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authorAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
committerAnton Arapov <anton@redhat.com>2012-04-16 10:05:28 +0200
commitb4b6116a13633898cf868f2f103c96a90c4c20f8 (patch)
tree93d1b7e2cfcdf473d8d4ff3ad141fa864f8491f6 /arch/um
parentedd4be777c953e5faafc80d091d3084b4343f5d3 (diff)
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fedora kernel: d9aad82f3319f3cfd1aebc01234254ef0c37ad84v3.3.2-1
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/um')
-rw-r--r--arch/um/Kconfig.char127
-rw-r--r--arch/um/Kconfig.common69
-rw-r--r--arch/um/Kconfig.debug40
-rw-r--r--arch/um/Kconfig.net202
-rw-r--r--arch/um/Kconfig.rest21
-rw-r--r--arch/um/Kconfig.um158
-rw-r--r--arch/um/Makefile162
-rw-r--r--arch/um/Makefile-ia641
-rw-r--r--arch/um/Makefile-os-Linux9
-rw-r--r--arch/um/Makefile-ppc9
-rw-r--r--arch/um/Makefile-skas12
-rw-r--r--arch/um/defconfig615
-rw-r--r--arch/um/drivers/Makefile67
-rw-r--r--arch/um/drivers/chan.h50
-rw-r--r--arch/um/drivers/chan_kern.c622
-rw-r--r--arch/um/drivers/chan_user.c301
-rw-r--r--arch/um/drivers/chan_user.h55
-rw-r--r--arch/um/drivers/cow.h67
-rw-r--r--arch/um/drivers/cow_sys.h40
-rw-r--r--arch/um/drivers/cow_user.c444
-rw-r--r--arch/um/drivers/daemon.h29
-rw-r--r--arch/um/drivers/daemon_kern.c95
-rw-r--r--arch/um/drivers/daemon_user.c193
-rw-r--r--arch/um/drivers/fd.c95
-rw-r--r--arch/um/drivers/harddog_kern.c201
-rw-r--r--arch/um/drivers/harddog_user.c127
-rw-r--r--arch/um/drivers/hostaudio_kern.c358
-rw-r--r--arch/um/drivers/line.c883
-rw-r--r--arch/um/drivers/line.h106
-rw-r--r--arch/um/drivers/mconsole.h98
-rw-r--r--arch/um/drivers/mconsole_kern.c917
-rw-r--r--arch/um/drivers/mconsole_kern.h52
-rw-r--r--arch/um/drivers/mconsole_user.c219
-rw-r--r--arch/um/drivers/mmapper_kern.c134
-rw-r--r--arch/um/drivers/net_kern.c914
-rw-r--r--arch/um/drivers/net_user.c269
-rw-r--r--arch/um/drivers/null.c51
-rw-r--r--arch/um/drivers/pcap_kern.c113
-rw-r--r--arch/um/drivers/pcap_user.c137
-rw-r--r--arch/um/drivers/pcap_user.h21
-rw-r--r--arch/um/drivers/port.h20
-rw-r--r--arch/um/drivers/port_kern.c306
-rw-r--r--arch/um/drivers/port_user.c201
-rw-r--r--arch/um/drivers/pty.c165
-rw-r--r--arch/um/drivers/random.c169
-rw-r--r--arch/um/drivers/slip.h20
-rw-r--r--arch/um/drivers/slip_common.c54
-rw-r--r--arch/um/drivers/slip_common.h105
-rw-r--r--arch/um/drivers/slip_kern.c93
-rw-r--r--arch/um/drivers/slip_user.c251
-rw-r--r--arch/um/drivers/slirp.h33
-rw-r--r--arch/um/drivers/slirp_kern.c120
-rw-r--r--arch/um/drivers/slirp_user.c125
-rw-r--r--arch/um/drivers/ssl.c229
-rw-r--r--arch/um/drivers/ssl.h13
-rw-r--r--arch/um/drivers/stderr_console.c62
-rw-r--r--arch/um/drivers/stdio_console.c203
-rw-r--r--arch/um/drivers/stdio_console.h11
-rw-r--r--arch/um/drivers/tty.c81
-rw-r--r--arch/um/drivers/ubd_kern.c1473
-rw-r--r--arch/um/drivers/ubd_user.c66
-rw-r--r--arch/um/drivers/ubd_user.h16
-rw-r--r--arch/um/drivers/umcast.h27
-rw-r--r--arch/um/drivers/umcast_kern.c188
-rw-r--r--arch/um/drivers/umcast_user.c184
-rw-r--r--arch/um/drivers/vde.h32
-rw-r--r--arch/um/drivers/vde_kern.c129
-rw-r--r--arch/um/drivers/vde_user.c125
-rw-r--r--arch/um/drivers/xterm.c223
-rw-r--r--arch/um/drivers/xterm.h12
-rw-r--r--arch/um/drivers/xterm_kern.c76
-rw-r--r--arch/um/include/asm/Kbuild3
-rw-r--r--arch/um/include/asm/a.out-core.h27
-rw-r--r--arch/um/include/asm/asm-offsets.h1
-rw-r--r--arch/um/include/asm/auxvec.h4
-rw-r--r--arch/um/include/asm/bugs.h6
-rw-r--r--arch/um/include/asm/cache.h17
-rw-r--r--arch/um/include/asm/common.lds.S108
-rw-r--r--arch/um/include/asm/current.h13
-rw-r--r--arch/um/include/asm/delay.h18
-rw-r--r--arch/um/include/asm/dma.h10
-rw-r--r--arch/um/include/asm/fixmap.h99
-rw-r--r--arch/um/include/asm/io.h57
-rw-r--r--arch/um/include/asm/irq.h23
-rw-r--r--arch/um/include/asm/irqflags.h42
-rw-r--r--arch/um/include/asm/kmap_types.h29
-rw-r--r--arch/um/include/asm/mmu.h24
-rw-r--r--arch/um/include/asm/mmu_context.h51
-rw-r--r--arch/um/include/asm/mutex.h9
-rw-r--r--arch/um/include/asm/page.h122
-rw-r--r--arch/um/include/asm/param.h20
-rw-r--r--arch/um/include/asm/pci.h6
-rw-r--r--arch/um/include/asm/pgalloc.h62
-rw-r--r--arch/um/include/asm/pgtable-2level.h53
-rw-r--r--arch/um/include/asm/pgtable-3level.h136
-rw-r--r--arch/um/include/asm/pgtable.h369
-rw-r--r--arch/um/include/asm/processor-generic.h138
-rw-r--r--arch/um/include/asm/ptrace-generic.h44
-rw-r--r--arch/um/include/asm/setup.h10
-rw-r--r--arch/um/include/asm/smp.h32
-rw-r--r--arch/um/include/asm/thread_info.h83
-rw-r--r--arch/um/include/asm/timex.h13
-rw-r--r--arch/um/include/asm/tlb.h120
-rw-r--r--arch/um/include/asm/tlbflush.h31
-rw-r--r--arch/um/include/asm/uaccess.h178
-rw-r--r--arch/um/include/shared/aio.h28
-rw-r--r--arch/um/include/shared/arch.h15
-rw-r--r--arch/um/include/shared/as-layout.h67
-rw-r--r--arch/um/include/shared/common-offsets.h53
-rw-r--r--arch/um/include/shared/elf_user.h19
-rw-r--r--arch/um/include/shared/frame_kern.h22
-rw-r--r--arch/um/include/shared/init.h151
-rw-r--r--arch/um/include/shared/irq_kern.h18
-rw-r--r--arch/um/include/shared/irq_user.h30
-rw-r--r--arch/um/include/shared/kern.h22
-rw-r--r--arch/um/include/shared/kern_util.h68
-rw-r--r--arch/um/include/shared/longjmp.h23
-rw-r--r--arch/um/include/shared/mem.h22
-rw-r--r--arch/um/include/shared/mem_user.h62
-rw-r--r--arch/um/include/shared/net_kern.h70
-rw-r--r--arch/um/include/shared/net_user.h53
-rw-r--r--arch/um/include/shared/os.h302
-rw-r--r--arch/um/include/shared/ptrace_user.h56
-rw-r--r--arch/um/include/shared/registers.h24
-rw-r--r--arch/um/include/shared/sigio.h14
-rw-r--r--arch/um/include/shared/skas/mm_id.h17
-rw-r--r--arch/um/include/shared/skas/proc_mm.h44
-rw-r--r--arch/um/include/shared/skas/skas.h22
-rw-r--r--arch/um/include/shared/skas/stub-data.h18
-rw-r--r--arch/um/include/shared/skas_ptrace.h14
-rw-r--r--arch/um/include/shared/sysrq.h7
-rw-r--r--arch/um/include/shared/um_malloc.h19
-rw-r--r--arch/um/include/shared/user.h46
-rw-r--r--arch/um/kernel/Makefile48
-rw-r--r--arch/um/kernel/asm-offsets.c1
-rw-r--r--arch/um/kernel/config.c.in26
-rw-r--r--arch/um/kernel/dyn.lds.S166
-rw-r--r--arch/um/kernel/early_printk.c33
-rw-r--r--arch/um/kernel/exec.c88
-rw-r--r--arch/um/kernel/exitcode.c78
-rw-r--r--arch/um/kernel/gmon_syms.c9
-rw-r--r--arch/um/kernel/gprof_syms.c9
-rw-r--r--arch/um/kernel/init_task.c38
-rw-r--r--arch/um/kernel/initrd.c85
-rw-r--r--arch/um/kernel/internal.h1
-rw-r--r--arch/um/kernel/irq.c464
-rw-r--r--arch/um/kernel/ksyms.c44
-rw-r--r--arch/um/kernel/mem.c322
-rw-r--r--arch/um/kernel/physmem.c215
-rw-r--r--arch/um/kernel/process.c468
-rw-r--r--arch/um/kernel/ptrace.c209
-rw-r--r--arch/um/kernel/reboot.c57
-rw-r--r--arch/um/kernel/sigio.c50
-rw-r--r--arch/um/kernel/signal.c181
-rw-r--r--arch/um/kernel/skas/Makefile15
-rw-r--r--arch/um/kernel/skas/clone.c56
-rw-r--r--arch/um/kernel/skas/mmu.c192
-rw-r--r--arch/um/kernel/skas/process.c81
-rw-r--r--arch/um/kernel/skas/syscall.c40
-rw-r--r--arch/um/kernel/skas/uaccess.c259
-rw-r--r--arch/um/kernel/smp.c239
-rw-r--r--arch/um/kernel/syscall.c68
-rw-r--r--arch/um/kernel/sysrq.c78
-rw-r--r--arch/um/kernel/time.c115
-rw-r--r--arch/um/kernel/tlb.c536
-rw-r--r--arch/um/kernel/trap.c276
-rw-r--r--arch/um/kernel/um_arch.c404
-rw-r--r--arch/um/kernel/umid.c38
-rw-r--r--arch/um/kernel/uml.lds.S108
-rw-r--r--arch/um/kernel/vmlinux.lds.S8
-rw-r--r--arch/um/os-Linux/Makefile22
-rw-r--r--arch/um/os-Linux/aio.c391
-rw-r--r--arch/um/os-Linux/drivers/Makefile13
-rw-r--r--arch/um/os-Linux/drivers/etap.h21
-rw-r--r--arch/um/os-Linux/drivers/ethertap_kern.c100
-rw-r--r--arch/um/os-Linux/drivers/ethertap_user.c248
-rw-r--r--arch/um/os-Linux/drivers/tuntap.h21
-rw-r--r--arch/um/os-Linux/drivers/tuntap_kern.c86
-rw-r--r--arch/um/os-Linux/drivers/tuntap_user.c215
-rw-r--r--arch/um/os-Linux/elf_aux.c73
-rw-r--r--arch/um/os-Linux/execvp.c149
-rw-r--r--arch/um/os-Linux/file.c576
-rw-r--r--arch/um/os-Linux/helper.c164
-rw-r--r--arch/um/os-Linux/internal.h1
-rw-r--r--arch/um/os-Linux/irq.c135
-rw-r--r--arch/um/os-Linux/main.c263
-rw-r--r--arch/um/os-Linux/mem.c279
-rw-r--r--arch/um/os-Linux/process.c259
-rw-r--r--arch/um/os-Linux/registers.c58
-rw-r--r--arch/um/os-Linux/sigio.c546
-rw-r--r--arch/um/os-Linux/signal.c302
-rw-r--r--arch/um/os-Linux/skas/Makefile10
-rw-r--r--arch/um/os-Linux/skas/mem.c293
-rw-r--r--arch/um/os-Linux/skas/process.c736
-rw-r--r--arch/um/os-Linux/start_up.c540
-rw-r--r--arch/um/os-Linux/time.c186
-rw-r--r--arch/um/os-Linux/tty.c60
-rw-r--r--arch/um/os-Linux/umid.c394
-rw-r--r--arch/um/os-Linux/user_syms.c120
-rw-r--r--arch/um/os-Linux/util.c144
-rw-r--r--arch/um/scripts/Makefile.rules27
-rw-r--r--arch/um/sys-ia64/Makefile11
-rw-r--r--arch/um/sys-ia64/sysdep/ptrace.h16
-rw-r--r--arch/um/sys-ia64/sysdep/sigcontext.h10
-rw-r--r--arch/um/sys-ia64/sysdep/skas_ptrace.h22
-rw-r--r--arch/um/sys-ia64/sysdep/syscalls.h10
-rw-r--r--arch/um/sys-ppc/Makefile65
-rw-r--r--arch/um/sys-ppc/asm/archparam.h8
-rw-r--r--arch/um/sys-ppc/asm/elf.h51
-rw-r--r--arch/um/sys-ppc/asm/processor.h15
-rw-r--r--arch/um/sys-ppc/misc.S111
-rw-r--r--arch/um/sys-ppc/miscthings.c42
-rw-r--r--arch/um/sys-ppc/ptrace.c58
-rw-r--r--arch/um/sys-ppc/ptrace_user.c29
-rw-r--r--arch/um/sys-ppc/shared/sysdep/ptrace.h93
-rw-r--r--arch/um/sys-ppc/shared/sysdep/sigcontext.h52
-rw-r--r--arch/um/sys-ppc/shared/sysdep/skas_ptrace.h22
-rw-r--r--arch/um/sys-ppc/shared/sysdep/syscalls.h43
-rw-r--r--arch/um/sys-ppc/sigcontext.c4
-rw-r--r--arch/um/sys-ppc/sysrq.c31
220 files changed, 28389 insertions, 0 deletions
diff --git a/arch/um/Kconfig.char b/arch/um/Kconfig.char
new file mode 100644
index 00000000000..b9d7c427668
--- /dev/null
+++ b/arch/um/Kconfig.char
@@ -0,0 +1,127 @@
+menu "UML Character Devices"
+
+config STDERR_CONSOLE
+ bool "stderr console"
+ default y
+ help
+ console driver which dumps all printk messages to stderr.
+
+config STDIO_CONSOLE
+ bool
+ default y
+
+config SSL
+ bool "Virtual serial line"
+ help
+ The User-Mode Linux environment allows you to create virtual serial
+ lines on the UML that are usually made to show up on the host as
+ ttys or ptys.
+
+ See <http://user-mode-linux.sourceforge.net/old/input.html> for more
+ information and command line examples of how to use this facility.
+
+ Unless you have a specific reason for disabling this, say Y.
+
+config NULL_CHAN
+ bool "null channel support"
+ help
+ This option enables support for attaching UML consoles and serial
+ lines to a device similar to /dev/null. Data written to it disappears
+ and there is never any data to be read.
+
+config PORT_CHAN
+ bool "port channel support"
+ help
+ This option enables support for attaching UML consoles and serial
+ lines to host portals. They may be accessed with 'telnet <host>
+ <port number>'. Any number of consoles and serial lines may be
+ attached to a single portal, although what UML device you get when
+ you telnet to that portal will be unpredictable.
+ It is safe to say 'Y' here.
+
+config PTY_CHAN
+ bool "pty channel support"
+ help
+ This option enables support for attaching UML consoles and serial
+ lines to host pseudo-terminals. Access to both traditional
+ pseudo-terminals (/dev/pty*) and pts pseudo-terminals are controlled
+ with this option. The assignment of UML devices to host devices
+ will be announced in the kernel message log.
+ It is safe to say 'Y' here.
+
+config TTY_CHAN
+ bool "tty channel support"
+ help
+ This option enables support for attaching UML consoles and serial
+ lines to host terminals. Access to both virtual consoles
+ (/dev/tty*) and the slave side of pseudo-terminals (/dev/ttyp* and
+ /dev/pts/*) are controlled by this option.
+ It is safe to say 'Y' here.
+
+config XTERM_CHAN
+ bool "xterm channel support"
+ help
+ This option enables support for attaching UML consoles and serial
+ lines to xterms. Each UML device so assigned will be brought up in
+ its own xterm.
+ It is safe to say 'Y' here.
+
+config NOCONFIG_CHAN
+ bool
+ default !(XTERM_CHAN && TTY_CHAN && PTY_CHAN && PORT_CHAN && NULL_CHAN)
+
+config CON_ZERO_CHAN
+ string "Default main console channel initialization"
+ default "fd:0,fd:1"
+ help
+ This is the string describing the channel to which the main console
+ will be attached by default. This value can be overridden from the
+ command line. The default value is "fd:0,fd:1", which attaches the
+ main console to stdin and stdout.
+ It is safe to leave this unchanged.
+
+config CON_CHAN
+ string "Default console channel initialization"
+ default "xterm"
+ help
+ This is the string describing the channel to which all consoles
+ except the main console will be attached by default. This value can
+ be overridden from the command line. The default value is "xterm",
+ which brings them up in xterms.
+ It is safe to leave this unchanged, although you may wish to change
+ this if you expect the UML that you build to be run in environments
+ which don't have X or xterm available.
+
+config SSL_CHAN
+ string "Default serial line channel initialization"
+ default "pty"
+ help
+ This is the string describing the channel to which the serial lines
+ will be attached by default. This value can be overridden from the
+ command line. The default value is "pty", which attaches them to
+ traditional pseudo-terminals.
+ It is safe to leave this unchanged, although you may wish to change
+ this if you expect the UML that you build to be run in environments
+ which don't have a set of /dev/pty* devices.
+
+config UML_SOUND
+ tristate "Sound support"
+ help
+ This option enables UML sound support. If enabled, it will pull in
+ soundcore and the UML hostaudio relay, which acts as a intermediary
+ between the host's dsp and mixer devices and the UML sound system.
+ It is safe to say 'Y' here.
+
+config SOUND
+ tristate
+ default UML_SOUND
+
+config SOUND_OSS_CORE
+ bool
+ default UML_SOUND
+
+config HOSTAUDIO
+ tristate
+ default UML_SOUND
+
+endmenu
diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common
new file mode 100644
index 00000000000..b37ae706af3
--- /dev/null
+++ b/arch/um/Kconfig.common
@@ -0,0 +1,69 @@
+config DEFCONFIG_LIST
+ string
+ option defconfig_list
+ default "arch/$ARCH/defconfig"
+
+config UML
+ bool
+ default y
+ select HAVE_GENERIC_HARDIRQS
+ select GENERIC_IRQ_SHOW
+ select GENERIC_CPU_DEVICES
+
+config MMU
+ bool
+ default y
+
+config NO_IOMEM
+ def_bool y
+
+config ISA
+ bool
+
+config SBUS
+ bool
+
+config PCI
+ bool
+
+config PCMCIA
+ bool
+
+# Yet to do!
+config TRACE_IRQFLAGS_SUPPORT
+ bool
+ default n
+
+config LOCKDEP_SUPPORT
+ bool
+ default y
+
+config STACKTRACE_SUPPORT
+ bool
+ default n
+
+config GENERIC_CALIBRATE_DELAY
+ bool
+ default y
+
+config GENERIC_BUG
+ bool
+ default y
+ depends on BUG
+
+config GENERIC_CLOCKEVENTS
+ bool
+ default y
+
+# Used in kernel/irq/manage.c and include/linux/irq.h
+config IRQ_RELEASE_METHOD
+ bool
+ default y
+
+config HZ
+ int
+ default 100
+
+config SUBARCH
+ string
+ option env="SUBARCH"
diff --git a/arch/um/Kconfig.debug b/arch/um/Kconfig.debug
new file mode 100644
index 00000000000..68205fd3b08
--- /dev/null
+++ b/arch/um/Kconfig.debug
@@ -0,0 +1,40 @@
+menu "Kernel hacking"
+
+source "lib/Kconfig.debug"
+
+config GPROF
+ bool "Enable gprof support"
+ depends on DEBUG_INFO && FRAME_POINTER
+ help
+ This allows profiling of a User-Mode Linux kernel with the gprof
+ utility.
+
+ See <http://user-mode-linux.sourceforge.net/old/gprof.html> for more
+ details.
+
+ If you're involved in UML kernel development and want to use gprof,
+ say Y. If you're unsure, say N.
+
+config GCOV
+ bool "Enable gcov support"
+ depends on DEBUG_INFO
+ help
+ This option allows developers to retrieve coverage data from a UML
+ session.
+
+ See <http://user-mode-linux.sourceforge.net/old/gprof.html> for more
+ details.
+
+ If you're involved in UML kernel development and want to use gcov,
+ say Y. If you're unsure, say N.
+
+config EARLY_PRINTK
+ bool "Early printk"
+ default y
+ ---help---
+ Write kernel log output directly to stdout.
+
+ This is useful for kernel debugging when your machine crashes very
+ early before the console code is initialized.
+
+endmenu
diff --git a/arch/um/Kconfig.net b/arch/um/Kconfig.net
new file mode 100644
index 00000000000..3160b1a5adb
--- /dev/null
+++ b/arch/um/Kconfig.net
@@ -0,0 +1,202 @@
+
+menu "UML Network Devices"
+ depends on NET
+
+# UML virtual driver
+config UML_NET
+ bool "Virtual network device"
+ help
+ While the User-Mode port cannot directly talk to any physical
+ hardware devices, this choice and the following transport options
+ provide one or more virtual network devices through which the UML
+ kernels can talk to each other, the host, and with the host's help,
+ machines on the outside world.
+
+ For more information, including explanations of the networking and
+ sample configurations, see
+ <http://user-mode-linux.sourceforge.net/old/networking.html>.
+
+ If you'd like to be able to enable networking in the User-Mode
+ linux environment, say Y; otherwise say N. Note that you must
+ enable at least one of the following transport options to actually
+ make use of UML networking.
+
+config UML_NET_ETHERTAP
+ bool "Ethertap transport"
+ depends on UML_NET
+ help
+ The Ethertap User-Mode Linux network transport allows a single
+ running UML to exchange packets with its host over one of the
+ host's Ethertap devices, such as /dev/tap0. Additional running
+ UMLs can use additional Ethertap devices, one per running UML.
+ While the UML believes it's on a (multi-device, broadcast) virtual
+ Ethernet network, it's in fact communicating over a point-to-point
+ link with the host.
+
+ To use this, your host kernel must have support for Ethertap
+ devices. Also, if your host kernel is 2.4.x, it must have
+ CONFIG_NETLINK_DEV configured as Y or M.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/old/networking.html> That site
+ has examples of the UML command line to use to enable Ethertap
+ networking.
+
+ If you'd like to set up an IP network with the host and/or the
+ outside world, say Y to this, the Daemon Transport and/or the
+ Slip Transport. You'll need at least one of them, but may choose
+ more than one without conflict. If you don't need UML networking,
+ say N.
+
+config UML_NET_TUNTAP
+ bool "TUN/TAP transport"
+ depends on UML_NET
+ help
+ The UML TUN/TAP network transport allows a UML instance to exchange
+ packets with the host over a TUN/TAP device. This option will only
+ work with a 2.4 host, unless you've applied the TUN/TAP patch to
+ your 2.2 host kernel.
+
+ To use this transport, your host kernel must have support for TUN/TAP
+ devices, either built-in or as a module.
+
+config UML_NET_SLIP
+ bool "SLIP transport"
+ depends on UML_NET
+ help
+ The slip User-Mode Linux network transport allows a running UML to
+ network with its host over a point-to-point link. Unlike Ethertap,
+ which can carry any Ethernet frame (and hence even non-IP packets),
+ the slip transport can only carry IP packets.
+
+ To use this, your host must support slip devices.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/old/networking.html>.
+ has examples of the UML command line to use to enable slip
+ networking, and details of a few quirks with it.
+
+ The Ethertap Transport is preferred over slip because of its
+ limitations. If you prefer slip, however, say Y here. Otherwise
+ choose the Multicast transport (to network multiple UMLs on
+ multiple hosts), Ethertap (to network with the host and the
+ outside world), and/or the Daemon transport (to network multiple
+ UMLs on a single host). You may choose more than one without
+ conflict. If you don't need UML networking, say N.
+
+config UML_NET_DAEMON
+ bool "Daemon transport"
+ depends on UML_NET
+ help
+ This User-Mode Linux network transport allows one or more running
+ UMLs on a single host to communicate with each other, but not to
+ the host.
+
+ To use this form of networking, you'll need to run the UML
+ networking daemon on the host.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/old/networking.html> That site
+ has examples of the UML command line to use to enable Daemon
+ networking.
+
+ If you'd like to set up a network with other UMLs on a single host,
+ say Y. If you need a network between UMLs on multiple physical
+ hosts, choose the Multicast Transport. To set up a network with
+ the host and/or other IP machines, say Y to the Ethertap or Slip
+ transports. You'll need at least one of them, but may choose
+ more than one without conflict. If you don't need UML networking,
+ say N.
+
+config UML_NET_VDE
+ bool "VDE transport"
+ depends on UML_NET
+ help
+ This User-Mode Linux network transport allows one or more running
+ UMLs on a single host to communicate with each other and also
+ with the rest of the world using Virtual Distributed Ethernet,
+ an improved fork of uml_switch.
+
+ You must have libvdeplug installed in order to build the vde
+ transport into UML.
+
+ To use this form of networking, you will need to run vde_switch
+ on the host.
+
+ For more information, see <http://wiki.virtualsquare.org/>
+ That site has a good overview of what VDE is and also examples
+ of the UML command line to use to enable VDE networking.
+
+ If you need UML networking with VDE,
+ say Y.
+
+config UML_NET_MCAST
+ bool "Multicast transport"
+ depends on UML_NET
+ help
+ This Multicast User-Mode Linux network transport allows multiple
+ UMLs (even ones running on different host machines!) to talk to
+ each other over a virtual ethernet network. However, it requires
+ at least one UML with one of the other transports to act as a
+ bridge if any of them need to be able to talk to their hosts or any
+ other IP machines.
+
+ To use this, your host kernel(s) must support IP Multicasting.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/old/networking.html> That site
+ has examples of the UML command line to use to enable Multicast
+ networking, and notes about the security of this approach.
+
+ If you need UMLs on multiple physical hosts to communicate as if
+ they shared an Ethernet network, say Y. If you need to communicate
+ with other IP machines, make sure you select one of the other
+ transports (possibly in addition to Multicast; they're not
+ exclusive). If you don't need to network UMLs say N to each of
+ the transports.
+
+config UML_NET_PCAP
+ bool "pcap transport"
+ depends on UML_NET && EXPERIMENTAL
+ help
+ The pcap transport makes a pcap packet stream on the host look
+ like an ethernet device inside UML. This is useful for making
+ UML act as a network monitor for the host. You must have libcap
+ installed in order to build the pcap transport into UML.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/old/networking.html> That site
+ has examples of the UML command line to use to enable this option.
+
+ If you intend to use UML as a network monitor for the host, say
+ Y here. Otherwise, say N.
+
+config UML_NET_SLIRP
+ bool "SLiRP transport"
+ depends on UML_NET
+ help
+ The SLiRP User-Mode Linux network transport allows a running UML
+ to network by invoking a program that can handle SLIP encapsulated
+ packets. This is commonly (but not limited to) the application
+ known as SLiRP, a program that can re-socket IP packets back onto
+ the host on which it is run. Only IP packets are supported,
+ unlike other network transports that can handle all Ethernet
+ frames. In general, slirp allows the UML the same IP connectivity
+ to the outside world that the host user is permitted, and unlike
+ other transports, SLiRP works without the need of root level
+ privleges, setuid binaries, or SLIP devices on the host. This
+ also means not every type of connection is possible, but most
+ situations can be accommodated with carefully crafted slirp
+ commands that can be passed along as part of the network device's
+ setup string. The effect of this transport on the UML is similar
+ that of a host behind a firewall that masquerades all network
+ connections passing through it (but is less secure).
+
+ To use this you should first have slirp compiled somewhere
+ accessible on the host, and have read its documentation. If you
+ don't need UML networking, say N.
+
+ Startup example: "eth0=slirp,FE:FD:01:02:03:04,/usr/local/bin/slirp"
+
+endmenu
+
diff --git a/arch/um/Kconfig.rest b/arch/um/Kconfig.rest
new file mode 100644
index 00000000000..567eb5fc21d
--- /dev/null
+++ b/arch/um/Kconfig.rest
@@ -0,0 +1,21 @@
+source "init/Kconfig"
+
+source "kernel/Kconfig.freezer"
+
+source "arch/um/Kconfig.char"
+
+source "drivers/Kconfig"
+
+source "net/Kconfig"
+
+source "arch/um/Kconfig.net"
+
+source "fs/Kconfig"
+
+source "security/Kconfig"
+
+source "crypto/Kconfig"
+
+source "lib/Kconfig"
+
+source "arch/um/Kconfig.debug"
diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um
new file mode 100644
index 00000000000..70fd690964e
--- /dev/null
+++ b/arch/um/Kconfig.um
@@ -0,0 +1,158 @@
+config STATIC_LINK
+ bool "Force a static link"
+ default n
+ help
+ This option gives you the ability to force a static link of UML.
+ Normally, UML is linked as a shared binary. This is inconvenient for
+ use in a chroot jail. So, if you intend to run UML inside a chroot,
+ you probably want to say Y here.
+ Additionally, this option enables using higher memory spaces (up to
+ 2.75G) for UML.
+
+source "mm/Kconfig"
+source "kernel/time/Kconfig"
+
+config LD_SCRIPT_STATIC
+ bool
+ default y
+ depends on STATIC_LINK
+
+config LD_SCRIPT_DYN
+ bool
+ default y
+ depends on !LD_SCRIPT_STATIC
+
+source "fs/Kconfig.binfmt"
+
+config HOSTFS
+ tristate "Host filesystem"
+ help
+ While the User-Mode Linux port uses its own root file system for
+ booting and normal file access, this module lets the UML user
+ access files stored on the host. It does not require any
+ network connection between the Host and UML. An example use of
+ this might be:
+
+ mount none /tmp/fromhost -t hostfs -o /tmp/umlshare
+
+ where /tmp/fromhost is an empty directory inside UML and
+ /tmp/umlshare is a directory on the host with files the UML user
+ wishes to access.
+
+ For more information, see
+ <http://user-mode-linux.sourceforge.net/hostfs.html>.
+
+ If you'd like to be able to work with files stored on the host,
+ say Y or M here; otherwise say N.
+
+config HPPFS
+ tristate "HoneyPot ProcFS (EXPERIMENTAL)"
+ depends on EXPERIMENTAL && PROC_FS
+ help
+ hppfs (HoneyPot ProcFS) is a filesystem which allows UML /proc
+ entries to be overridden, removed, or fabricated from the host.
+ Its purpose is to allow a UML to appear to be a physical machine
+ by removing or changing anything in /proc which gives away the
+ identity of a UML.
+
+ See <http://user-mode-linux.sf.net/old/hppfs.html> for more information.
+
+ You only need this if you are setting up a UML honeypot. Otherwise,
+ it is safe to say 'N' here.
+
+config MCONSOLE
+ bool "Management console"
+ default y
+ help
+ The user mode linux management console is a low-level interface to
+ the kernel, somewhat like the i386 SysRq interface. Since there is
+ a full-blown operating system running under every user mode linux
+ instance, there is much greater flexibility possible than with the
+ SysRq mechanism.
+
+ If you answer 'Y' to this option, to use this feature, you need the
+ mconsole client (called uml_mconsole) which is present in CVS in
+ 2.4.5-9um and later (path /tools/mconsole), and is also in the
+ distribution RPM package in 2.4.6 and later.
+
+ It is safe to say 'Y' here.
+
+config MAGIC_SYSRQ
+ bool "Magic SysRq key"
+ depends on MCONSOLE
+ help
+ If you say Y here, you will have some control over the system even
+ if the system crashes for example during kernel debugging (e.g., you
+ will be able to flush the buffer cache to disk, reboot the system
+ immediately or dump some status information). A key for each of the
+ possible requests is provided.
+
+ This is the feature normally accomplished by pressing a key
+ while holding SysRq (Alt+PrintScreen).
+
+ On UML, this is accomplished by sending a "sysrq" command with
+ mconsole, followed by the letter for the requested command.
+
+ The keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
+ unless you really know what this hack does.
+
+config SMP
+ bool "Symmetric multi-processing support (EXPERIMENTAL)"
+ default n
+ depends on BROKEN
+ help
+ This option enables UML SMP support.
+ It is NOT related to having a real SMP box. Not directly, at least.
+
+ UML implements virtual SMP by allowing as many processes to run
+ simultaneously on the host as there are virtual processors configured.
+
+ Obviously, if the host is a uniprocessor, those processes will
+ timeshare, but, inside UML, will appear to be running simultaneously.
+ If the host is a multiprocessor, then UML processes may run
+ simultaneously, depending on the host scheduler.
+
+ This, however, is supported only in TT mode. So, if you use the SKAS
+ patch on your host, switching to TT mode and enabling SMP usually
+ gives you worse performances.
+ Also, since the support for SMP has been under-developed, there could
+ be some bugs being exposed by enabling SMP.
+
+ If you don't know what to do, say N.
+
+config NR_CPUS
+ int "Maximum number of CPUs (2-32)"
+ range 2 32
+ depends on SMP
+ default "32"
+
+config HIGHMEM
+ bool "Highmem support (EXPERIMENTAL)"
+ depends on !64BIT && BROKEN
+ default n
+ help
+ This was used to allow UML to run with big amounts of memory.
+ Currently it is unstable, so if unsure say N.
+
+ To use big amounts of memory, it is recommended enable static
+ linking (i.e. CONFIG_STATIC_LINK) - this should allow the
+ guest to use up to 2.75G of memory.
+
+config KERNEL_STACK_ORDER
+ int "Kernel stack size order"
+ default 1 if 64BIT
+ range 1 10 if 64BIT
+ default 0 if !64BIT
+ help
+ This option determines the size of UML kernel stacks. They will
+ be 1 << order pages. The default is OK unless you're running Valgrind
+ on UML, in which case, set this to 3.
+
+config MMAPPER
+ tristate "iomem emulation driver"
+ help
+ This driver allows a host file to be used as emulated IO memory inside
+ UML.
+
+config NO_DMA
+ def_bool y
diff --git a/arch/um/Makefile b/arch/um/Makefile
new file mode 100644
index 00000000000..28688e6d96d
--- /dev/null
+++ b/arch/um/Makefile
@@ -0,0 +1,162 @@
+#
+# This file is included by the global makefile so that you can add your own
+# architecture-specific flags and dependencies.
+#
+# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+# Licensed under the GPL
+#
+
+ARCH_DIR := arch/um
+OS := $(shell uname -s)
+# We require bash because the vmlinux link and loader script cpp use bash
+# features.
+SHELL := /bin/bash
+
+filechk_gen_header = $<
+
+core-y += $(ARCH_DIR)/kernel/ \
+ $(ARCH_DIR)/drivers/ \
+ $(ARCH_DIR)/os-$(OS)/
+
+MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
+
+HEADER_ARCH := $(SUBARCH)
+
+# Additional ARCH settings for x86
+ifeq ($(SUBARCH),i386)
+ HEADER_ARCH := x86
+endif
+ifeq ($(SUBARCH),x86_64)
+ HEADER_ARCH := x86
+endif
+
+HOST_DIR := arch/$(HEADER_ARCH)
+
+include $(srctree)/$(ARCH_DIR)/Makefile-skas
+include $(srctree)/$(HOST_DIR)/Makefile.um
+
+core-y += $(HOST_DIR)/um/
+
+SHARED_HEADERS := $(ARCH_DIR)/include/shared
+ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
+ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
+KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
+
+# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
+# named - it's a common symbol in libpcap, so we get a binary which crashes.
+#
+# Same things for in6addr_loopback and mktime - found in libc. For these two we
+# only get link-time error, luckily.
+#
+# These apply to USER_CFLAGS to.
+
+KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
+ $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
+ -Din6addr_loopback=kernel_in6addr_loopback \
+ -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
+
+KBUILD_AFLAGS += $(ARCH_INCLUDE)
+
+USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
+ $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
+ $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
+
+#This will adjust *FLAGS accordingly to the platform.
+include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
+
+KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
+ -I$(HOST_DIR)/include/generated
+
+# -Derrno=kernel_errno - This turns all kernel references to errno into
+# kernel_errno to separate them from the libc errno. This allows -fno-common
+# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
+# errnos.
+# These apply to kernelspace only.
+#
+# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
+# defines more robust
+
+KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
+ -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
+KBUILD_CFLAGS += $(KERNEL_DEFINES)
+
+PHONY += linux
+
+all: linux
+
+linux: vmlinux
+ @echo ' LINK $@'
+ $(Q)ln -f $< $@
+
+define archhelp
+ echo '* linux - Binary kernel image (./linux) - for backward'
+ echo ' compatibility only, this creates a hard link to the'
+ echo ' real kernel binary, the "vmlinux" binary you'
+ echo ' find in the kernel root.'
+endef
+
+KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
+
+archheaders:
+ $(Q)$(MAKE) -C '$(srctree)' KBUILD_SRC= \
+ ARCH=$(SUBARCH) O='$(objtree)' archheaders
+
+archprepare: include/generated/user_constants.h
+
+LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
+LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
+
+CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
+ $(call cc-option, -fno-stack-protector,) \
+ $(call cc-option, -fno-stack-protector-all,)
+
+# Options used by linker script
+export LDS_START := $(START)
+export LDS_ELF_ARCH := $(ELF_ARCH)
+export LDS_ELF_FORMAT := $(ELF_FORMAT)
+
+# The wrappers will select whether using "malloc" or the kernel allocator.
+LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
+
+LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
+
+CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
+define cmd_vmlinux__
+ $(CC) $(CFLAGS_vmlinux) -o $@ \
+ -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
+ -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
+ -lutil \
+ $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
+ FORCE ,$^) ; rm -f linux
+endef
+
+# When cleaning we don't include .config, so we don't include
+# TT or skas makefiles and don't clean skas_ptregs.h.
+CLEAN_FILES += linux x.i gmon.out
+
+archclean:
+ @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
+ -o -name '*.gcov' \) -type f -print | xargs rm -f
+
+# Generated files
+
+$(HOST_DIR)/um/user-offsets.s: __headers FORCE
+ $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
+
+define filechk_gen-asm-offsets
+ (set -e; \
+ echo "/*"; \
+ echo " * DO NOT MODIFY."; \
+ echo " *"; \
+ echo " * This file was generated by arch/$(ARCH)/Makefile"; \
+ echo " *"; \
+ echo " */"; \
+ echo ""; \
+ sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
+ echo ""; )
+endef
+
+include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
+ $(call filechk,gen-asm-offsets)
+
+export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH
diff --git a/arch/um/Makefile-ia64 b/arch/um/Makefile-ia64
new file mode 100644
index 00000000000..f84dc23b0f6
--- /dev/null
+++ b/arch/um/Makefile-ia64
@@ -0,0 +1 @@
+START_ADDR = 0x1000000000000000
diff --git a/arch/um/Makefile-os-Linux b/arch/um/Makefile-os-Linux
new file mode 100644
index 00000000000..2c8a598ec14
--- /dev/null
+++ b/arch/um/Makefile-os-Linux
@@ -0,0 +1,9 @@
+#
+# Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+# To get a definition of F_SETSIG
+USER_CFLAGS += -D_GNU_SOURCE -D_LARGEFILE64_SOURCE
+KBUILD_CFLAGS += -D_LARGEFILE64_SOURCE
+DEV_NULL_PATH = \"/dev/null\"
diff --git a/arch/um/Makefile-ppc b/arch/um/Makefile-ppc
new file mode 100644
index 00000000000..66fd2003e16
--- /dev/null
+++ b/arch/um/Makefile-ppc
@@ -0,0 +1,9 @@
+ifeq ($(CONFIG_HOST_2G_2G), y)
+START_ADDR = 0x80000000
+else
+START_ADDR = 0xc0000000
+endif
+ARCH_CFLAGS = -U__powerpc__ -D__UM_PPC__
+
+# The arch is ppc, but the elf32 name is powerpc
+ELF_SUBARCH = powerpc
diff --git a/arch/um/Makefile-skas b/arch/um/Makefile-skas
new file mode 100644
index 00000000000..ac35de5316a
--- /dev/null
+++ b/arch/um/Makefile-skas
@@ -0,0 +1,12 @@
+#
+# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+GPROF_OPT += -pg
+GCOV_OPT += -fprofile-arcs -ftest-coverage
+
+CFLAGS-$(CONFIG_GCOV) += $(GCOV_OPT)
+CFLAGS-$(CONFIG_GPROF) += $(GPROF_OPT)
+LINK-$(CONFIG_GCOV) += $(GCOV_OPT)
+LINK-$(CONFIG_GPROF) += $(GPROF_OPT)
diff --git a/arch/um/defconfig b/arch/um/defconfig
new file mode 100644
index 00000000000..761f5e1a657
--- /dev/null
+++ b/arch/um/defconfig
@@ -0,0 +1,615 @@
+#
+# Automatically generated make config: don't edit
+# Linux kernel version: 2.6.24
+# Thu Feb 7 11:48:55 2008
+#
+CONFIG_DEFCONFIG_LIST="arch/$ARCH/defconfig"
+CONFIG_GENERIC_HARDIRQS=y
+CONFIG_UML=y
+CONFIG_MMU=y
+CONFIG_NO_IOMEM=y
+# CONFIG_TRACE_IRQFLAGS_SUPPORT is not set
+CONFIG_LOCKDEP_SUPPORT=y
+# CONFIG_STACKTRACE_SUPPORT is not set
+CONFIG_GENERIC_CALIBRATE_DELAY=y
+CONFIG_GENERIC_BUG=y
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_IRQ_RELEASE_METHOD=y
+CONFIG_HZ=100
+
+#
+# UML-specific options
+#
+# CONFIG_STATIC_LINK is not set
+
+#
+# Host processor type and features
+#
+# CONFIG_M386 is not set
+# CONFIG_M486 is not set
+# CONFIG_M586 is not set
+# CONFIG_M586TSC is not set
+# CONFIG_M586MMX is not set
+CONFIG_M686=y
+# CONFIG_MPENTIUMII is not set
+# CONFIG_MPENTIUMIII is not set
+# CONFIG_MPENTIUMM is not set
+# CONFIG_MPENTIUM4 is not set
+# CONFIG_MK6 is not set
+# CONFIG_MK7 is not set
+# CONFIG_MK8 is not set
+# CONFIG_MCRUSOE is not set
+# CONFIG_MEFFICEON is not set
+# CONFIG_MWINCHIPC6 is not set
+# CONFIG_MWINCHIP2 is not set
+# CONFIG_MWINCHIP3D is not set
+# CONFIG_MGEODEGX1 is not set
+# CONFIG_MGEODE_LX is not set
+# CONFIG_MCYRIXIII is not set
+# CONFIG_MVIAC3_2 is not set
+# CONFIG_MVIAC7 is not set
+# CONFIG_MPSC is not set
+# CONFIG_MCORE2 is not set
+# CONFIG_GENERIC_CPU is not set
+# CONFIG_X86_GENERIC is not set
+CONFIG_X86_CMPXCHG=y
+CONFIG_X86_L1_CACHE_SHIFT=5
+CONFIG_X86_XADD=y
+CONFIG_X86_PPRO_FENCE=y
+CONFIG_X86_WP_WORKS_OK=y
+CONFIG_X86_INVLPG=y
+CONFIG_X86_BSWAP=y
+CONFIG_X86_POPAD_OK=y
+CONFIG_X86_GOOD_APIC=y
+CONFIG_X86_USE_PPRO_CHECKSUM=y
+CONFIG_X86_TSC=y
+CONFIG_X86_CMOV=y
+CONFIG_X86_MINIMUM_CPU_FAMILY=4
+CONFIG_X86_DEBUGCTLMSR=y
+CONFIG_UML_X86=y
+CONFIG_X86_32=y
+CONFIG_RWSEM_XCHGADD_ALGORITHM=y
+# CONFIG_64BIT is not set
+CONFIG_SEMAPHORE_SLEEPERS=y
+# CONFIG_3_LEVEL_PGTABLES is not set
+CONFIG_ARCH_HAS_SC_SIGNALS=y
+CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA=y
+CONFIG_GENERIC_HWEIGHT=y
+CONFIG_SELECT_MEMORY_MODEL=y
+CONFIG_FLATMEM_MANUAL=y
+# CONFIG_DISCONTIGMEM_MANUAL is not set
+# CONFIG_SPARSEMEM_MANUAL is not set
+CONFIG_FLATMEM=y
+CONFIG_FLAT_NODE_MEM_MAP=y
+# CONFIG_SPARSEMEM_STATIC is not set
+# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
+CONFIG_SPLIT_PTLOCK_CPUS=4
+# CONFIG_RESOURCES_64BIT is not set
+CONFIG_ZONE_DMA_FLAG=0
+CONFIG_VIRT_TO_BUS=y
+CONFIG_TICK_ONESHOT=y
+CONFIG_NO_HZ=y
+CONFIG_HIGH_RES_TIMERS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_LD_SCRIPT_DYN=y
+CONFIG_BINFMT_ELF=y
+# CONFIG_BINFMT_AOUT is not set
+CONFIG_BINFMT_MISC=m
+CONFIG_HOSTFS=y
+# CONFIG_HPPFS is not set
+CONFIG_MCONSOLE=y
+CONFIG_MAGIC_SYSRQ=y
+# CONFIG_HIGHMEM is not set
+CONFIG_KERNEL_STACK_ORDER=0
+
+#
+# General setup
+#
+CONFIG_EXPERIMENTAL=y
+CONFIG_BROKEN_ON_SMP=y
+CONFIG_INIT_ENV_ARG_LIMIT=128
+CONFIG_LOCALVERSION=""
+CONFIG_LOCALVERSION_AUTO=y
+CONFIG_SWAP=y
+CONFIG_SYSVIPC=y
+CONFIG_SYSVIPC_SYSCTL=y
+CONFIG_POSIX_MQUEUE=y
+CONFIG_BSD_PROCESS_ACCT=y
+# CONFIG_BSD_PROCESS_ACCT_V3 is not set
+# CONFIG_TASKSTATS is not set
+# CONFIG_USER_NS is not set
+# CONFIG_PID_NS is not set
+# CONFIG_AUDIT is not set
+CONFIG_IKCONFIG=y
+CONFIG_IKCONFIG_PROC=y
+CONFIG_LOG_BUF_SHIFT=14
+# CONFIG_CGROUPS is not set
+CONFIG_FAIR_GROUP_SCHED=y
+CONFIG_FAIR_USER_SCHED=y
+# CONFIG_FAIR_CGROUP_SCHED is not set
+CONFIG_SYSFS_DEPRECATED=y
+# CONFIG_RELAY is not set
+# CONFIG_BLK_DEV_INITRD is not set
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
+CONFIG_SYSCTL=y
+# CONFIG_EXPERT is not set
+CONFIG_UID16=y
+CONFIG_SYSCTL_SYSCALL=y
+CONFIG_KALLSYMS=y
+# CONFIG_KALLSYMS_ALL is not set
+CONFIG_KALLSYMS_EXTRA_PASS=y
+CONFIG_HOTPLUG=y
+CONFIG_PRINTK=y
+CONFIG_BUG=y
+CONFIG_ELF_CORE=y
+CONFIG_BASE_FULL=y
+CONFIG_FUTEX=y
+CONFIG_ANON_INODES=y
+CONFIG_EPOLL=y
+CONFIG_SIGNALFD=y
+CONFIG_TIMERFD=y
+CONFIG_EVENTFD=y
+CONFIG_SHMEM=y
+CONFIG_VM_EVENT_COUNTERS=y
+CONFIG_SLAB=y
+# CONFIG_SLUB is not set
+# CONFIG_SLOB is not set
+# CONFIG_PROFILING is not set
+# CONFIG_MARKERS is not set
+# CONFIG_HAVE_OPROFILE is not set
+# CONFIG_HAVE_KPROBES is not set
+CONFIG_PROC_PAGE_MONITOR=y
+CONFIG_SLABINFO=y
+CONFIG_RT_MUTEXES=y
+# CONFIG_TINY_SHMEM is not set
+CONFIG_BASE_SMALL=0
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+# CONFIG_MODULE_FORCE_UNLOAD is not set
+# CONFIG_MODVERSIONS is not set
+# CONFIG_MODULE_SRCVERSION_ALL is not set
+CONFIG_KMOD=y
+CONFIG_BLOCK=y
+# CONFIG_LBD is not set
+# CONFIG_BLK_DEV_IO_TRACE is not set
+# CONFIG_LSF is not set
+# CONFIG_BLK_DEV_BSG is not set
+
+#
+# IO Schedulers
+#
+CONFIG_IOSCHED_NOOP=y
+CONFIG_IOSCHED_AS=y
+CONFIG_IOSCHED_DEADLINE=y
+CONFIG_IOSCHED_CFQ=y
+CONFIG_DEFAULT_AS=y
+# CONFIG_DEFAULT_DEADLINE is not set
+# CONFIG_DEFAULT_CFQ is not set
+# CONFIG_DEFAULT_NOOP is not set
+CONFIG_DEFAULT_IOSCHED="anticipatory"
+CONFIG_CLASSIC_RCU=y
+# CONFIG_PREEMPT_RCU is not set
+CONFIG_BLK_DEV=y
+CONFIG_BLK_DEV_UBD=y
+# CONFIG_BLK_DEV_UBD_SYNC is not set
+CONFIG_BLK_DEV_COW_COMMON=y
+CONFIG_BLK_DEV_LOOP=m
+# CONFIG_BLK_DEV_CRYPTOLOOP is not set
+CONFIG_BLK_DEV_NBD=m
+# CONFIG_BLK_DEV_RAM is not set
+# CONFIG_ATA_OVER_ETH is not set
+
+#
+# Character Devices
+#
+CONFIG_STDERR_CONSOLE=y
+CONFIG_STDIO_CONSOLE=y
+CONFIG_SSL=y
+CONFIG_NULL_CHAN=y
+CONFIG_PORT_CHAN=y
+CONFIG_PTY_CHAN=y
+CONFIG_TTY_CHAN=y
+CONFIG_XTERM_CHAN=y
+# CONFIG_NOCONFIG_CHAN is not set
+CONFIG_CON_ZERO_CHAN="fd:0,fd:1"
+CONFIG_CON_CHAN="xterm"
+CONFIG_SSL_CHAN="pts"
+CONFIG_UNIX98_PTYS=y
+CONFIG_LEGACY_PTYS=y
+# CONFIG_RAW_DRIVER is not set
+CONFIG_LEGACY_PTY_COUNT=32
+# CONFIG_WATCHDOG is not set
+CONFIG_UML_SOUND=m
+CONFIG_SOUND=m
+CONFIG_HOSTAUDIO=m
+# CONFIG_HW_RANDOM is not set
+CONFIG_UML_RANDOM=y
+# CONFIG_MMAPPER is not set
+
+#
+# Generic Driver Options
+#
+CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
+CONFIG_STANDALONE=y
+CONFIG_PREVENT_FIRMWARE_BUILD=y
+# CONFIG_FW_LOADER is not set
+# CONFIG_DEBUG_DRIVER is not set
+# CONFIG_DEBUG_DEVRES is not set
+# CONFIG_SYS_HYPERVISOR is not set
+
+#
+# Networking
+#
+CONFIG_NET=y
+
+#
+# Networking options
+#
+CONFIG_PACKET=y
+CONFIG_PACKET_MMAP=y
+CONFIG_UNIX=y
+CONFIG_XFRM=y
+# CONFIG_XFRM_USER is not set
+# CONFIG_XFRM_SUB_POLICY is not set
+# CONFIG_XFRM_MIGRATE is not set
+# CONFIG_XFRM_STATISTICS is not set
+# CONFIG_NET_KEY is not set
+CONFIG_INET=y
+# CONFIG_IP_MULTICAST is not set
+# CONFIG_IP_ADVANCED_ROUTER is not set
+CONFIG_IP_FIB_HASH=y
+# CONFIG_IP_PNP is not set
+# CONFIG_NET_IPIP is not set
+# CONFIG_NET_IPGRE is not set
+# CONFIG_ARPD is not set
+# CONFIG_SYN_COOKIES is not set
+# CONFIG_INET_AH is not set
+# CONFIG_INET_ESP is not set
+# CONFIG_INET_IPCOMP is not set
+# CONFIG_INET_XFRM_TUNNEL is not set
+# CONFIG_INET_TUNNEL is not set
+CONFIG_INET_XFRM_MODE_TRANSPORT=y
+CONFIG_INET_XFRM_MODE_TUNNEL=y
+CONFIG_INET_XFRM_MODE_BEET=y
+# CONFIG_INET_LRO is not set
+CONFIG_INET_DIAG=y
+CONFIG_INET_TCP_DIAG=y
+# CONFIG_TCP_CONG_ADVANCED is not set
+CONFIG_TCP_CONG_CUBIC=y
+CONFIG_DEFAULT_TCP_CONG="cubic"
+# CONFIG_TCP_MD5SIG is not set
+# CONFIG_IPV6 is not set
+# CONFIG_INET6_XFRM_TUNNEL is not set
+# CONFIG_INET6_TUNNEL is not set
+# CONFIG_NETWORK_SECMARK is not set
+# CONFIG_NETFILTER is not set
+# CONFIG_IP_DCCP is not set
+# CONFIG_IP_SCTP is not set
+# CONFIG_TIPC is not set
+# CONFIG_ATM is not set
+# CONFIG_BRIDGE is not set
+# CONFIG_VLAN_8021Q is not set
+# CONFIG_DECNET is not set
+# CONFIG_LLC2 is not set
+# CONFIG_IPX is not set
+# CONFIG_ATALK is not set
+# CONFIG_X25 is not set
+# CONFIG_LAPB is not set
+# CONFIG_ECONET is not set
+# CONFIG_WAN_ROUTER is not set
+# CONFIG_NET_SCHED is not set
+
+#
+# Network testing
+#
+# CONFIG_NET_PKTGEN is not set
+# CONFIG_HAMRADIO is not set
+# CONFIG_CAN is not set
+# CONFIG_IRDA is not set
+# CONFIG_BT is not set
+# CONFIG_AF_RXRPC is not set
+
+#
+# Wireless
+#
+# CONFIG_CFG80211 is not set
+# CONFIG_WIRELESS_EXT is not set
+# CONFIG_MAC80211 is not set
+# CONFIG_IEEE80211 is not set
+# CONFIG_RFKILL is not set
+# CONFIG_NET_9P is not set
+
+#
+# UML Network Devices
+#
+CONFIG_UML_NET=y
+CONFIG_UML_NET_ETHERTAP=y
+CONFIG_UML_NET_TUNTAP=y
+CONFIG_UML_NET_SLIP=y
+CONFIG_UML_NET_DAEMON=y
+# CONFIG_UML_NET_VDE is not set
+CONFIG_UML_NET_MCAST=y
+# CONFIG_UML_NET_PCAP is not set
+CONFIG_UML_NET_SLIRP=y
+CONFIG_NETDEVICES=y
+# CONFIG_NETDEVICES_MULTIQUEUE is not set
+CONFIG_DUMMY=m
+# CONFIG_BONDING is not set
+# CONFIG_MACVLAN is not set
+# CONFIG_EQUALIZER is not set
+CONFIG_TUN=m
+# CONFIG_VETH is not set
+
+#
+# Wireless LAN
+#
+# CONFIG_WLAN_PRE80211 is not set
+# CONFIG_WLAN_80211 is not set
+# CONFIG_WAN is not set
+CONFIG_PPP=m
+# CONFIG_PPP_MULTILINK is not set
+# CONFIG_PPP_FILTER is not set
+# CONFIG_PPP_ASYNC is not set
+# CONFIG_PPP_SYNC_TTY is not set
+# CONFIG_PPP_DEFLATE is not set
+# CONFIG_PPP_BSDCOMP is not set
+# CONFIG_PPP_MPPE is not set
+# CONFIG_PPPOE is not set
+# CONFIG_PPPOL2TP is not set
+CONFIG_SLIP=m
+# CONFIG_SLIP_COMPRESSED is not set
+CONFIG_SLHC=m
+# CONFIG_SLIP_SMART is not set
+# CONFIG_SLIP_MODE_SLIP6 is not set
+# CONFIG_NETCONSOLE is not set
+# CONFIG_NETPOLL is not set
+# CONFIG_NET_POLL_CONTROLLER is not set
+# CONFIG_CONNECTOR is not set
+
+#
+# File systems
+#
+CONFIG_EXT2_FS=y
+# CONFIG_EXT2_FS_XATTR is not set
+# CONFIG_EXT2_FS_XIP is not set
+CONFIG_EXT3_FS=y
+# CONFIG_EXT3_FS_XATTR is not set
+# CONFIG_EXT4DEV_FS is not set
+CONFIG_JBD=y
+CONFIG_REISERFS_FS=y
+# CONFIG_REISERFS_CHECK is not set
+# CONFIG_REISERFS_PROC_INFO is not set
+# CONFIG_REISERFS_FS_XATTR is not set
+# CONFIG_JFS_FS is not set
+# CONFIG_FS_POSIX_ACL is not set
+# CONFIG_XFS_FS is not set
+# CONFIG_GFS2_FS is not set
+# CONFIG_OCFS2_FS is not set
+# CONFIG_MINIX_FS is not set
+# CONFIG_ROMFS_FS is not set
+CONFIG_INOTIFY=y
+CONFIG_INOTIFY_USER=y
+CONFIG_QUOTA=y
+# CONFIG_QUOTA_NETLINK_INTERFACE is not set
+CONFIG_PRINT_QUOTA_WARNING=y
+# CONFIG_QFMT_V1 is not set
+# CONFIG_QFMT_V2 is not set
+CONFIG_QUOTACTL=y
+CONFIG_DNOTIFY=y
+CONFIG_AUTOFS_FS=m
+CONFIG_AUTOFS4_FS=m
+# CONFIG_FUSE_FS is not set
+
+#
+# CD-ROM/DVD Filesystems
+#
+CONFIG_ISO9660_FS=m
+CONFIG_JOLIET=y
+# CONFIG_ZISOFS is not set
+# CONFIG_UDF_FS is not set
+
+#
+# DOS/FAT/NT Filesystems
+#
+# CONFIG_MSDOS_FS is not set
+# CONFIG_VFAT_FS is not set
+# CONFIG_NTFS_FS is not set
+
+#
+# Pseudo filesystems
+#
+CONFIG_PROC_FS=y
+CONFIG_PROC_KCORE=y
+CONFIG_PROC_SYSCTL=y
+CONFIG_SYSFS=y
+CONFIG_TMPFS=y
+# CONFIG_TMPFS_POSIX_ACL is not set
+# CONFIG_HUGETLB_PAGE is not set
+# CONFIG_CONFIGFS_FS is not set
+
+#
+# Miscellaneous filesystems
+#
+# CONFIG_ADFS_FS is not set
+# CONFIG_AFFS_FS is not set
+# CONFIG_HFS_FS is not set
+# CONFIG_HFSPLUS_FS is not set
+# CONFIG_BEFS_FS is not set
+# CONFIG_BFS_FS is not set
+# CONFIG_EFS_FS is not set
+# CONFIG_CRAMFS is not set
+# CONFIG_VXFS_FS is not set
+# CONFIG_HPFS_FS is not set
+# CONFIG_QNX4FS_FS is not set
+# CONFIG_SYSV_FS is not set
+# CONFIG_UFS_FS is not set
+CONFIG_NETWORK_FILESYSTEMS=y
+# CONFIG_NFS_FS is not set
+# CONFIG_NFSD is not set
+# CONFIG_SMB_FS is not set
+# CONFIG_CIFS is not set
+# CONFIG_NCP_FS is not set
+# CONFIG_CODA_FS is not set
+# CONFIG_AFS_FS is not set
+
+#
+# Partition Types
+#
+# CONFIG_PARTITION_ADVANCED is not set
+CONFIG_MSDOS_PARTITION=y
+CONFIG_NLS=y
+CONFIG_NLS_DEFAULT="iso8859-1"
+# CONFIG_NLS_CODEPAGE_437 is not set
+# CONFIG_NLS_CODEPAGE_737 is not set
+# CONFIG_NLS_CODEPAGE_775 is not set
+# CONFIG_NLS_CODEPAGE_850 is not set
+# CONFIG_NLS_CODEPAGE_852 is not set
+# CONFIG_NLS_CODEPAGE_855 is not set
+# CONFIG_NLS_CODEPAGE_857 is not set
+# CONFIG_NLS_CODEPAGE_860 is not set
+# CONFIG_NLS_CODEPAGE_861 is not set
+# CONFIG_NLS_CODEPAGE_862 is not set
+# CONFIG_NLS_CODEPAGE_863 is not set
+# CONFIG_NLS_CODEPAGE_864 is not set
+# CONFIG_NLS_CODEPAGE_865 is not set
+# CONFIG_NLS_CODEPAGE_866 is not set
+# CONFIG_NLS_CODEPAGE_869 is not set
+# CONFIG_NLS_CODEPAGE_936 is not set
+# CONFIG_NLS_CODEPAGE_950 is not set
+# CONFIG_NLS_CODEPAGE_932 is not set
+# CONFIG_NLS_CODEPAGE_949 is not set
+# CONFIG_NLS_CODEPAGE_874 is not set
+# CONFIG_NLS_ISO8859_8 is not set
+# CONFIG_NLS_CODEPAGE_1250 is not set
+# CONFIG_NLS_CODEPAGE_1251 is not set
+# CONFIG_NLS_ASCII is not set
+# CONFIG_NLS_ISO8859_1 is not set
+# CONFIG_NLS_ISO8859_2 is not set
+# CONFIG_NLS_ISO8859_3 is not set
+# CONFIG_NLS_ISO8859_4 is not set
+# CONFIG_NLS_ISO8859_5 is not set
+# CONFIG_NLS_ISO8859_6 is not set
+# CONFIG_NLS_ISO8859_7 is not set
+# CONFIG_NLS_ISO8859_9 is not set
+# CONFIG_NLS_ISO8859_13 is not set
+# CONFIG_NLS_ISO8859_14 is not set
+# CONFIG_NLS_ISO8859_15 is not set
+# CONFIG_NLS_KOI8_R is not set
+# CONFIG_NLS_KOI8_U is not set
+# CONFIG_NLS_UTF8 is not set
+# CONFIG_DLM is not set
+
+#
+# Security options
+#
+# CONFIG_KEYS is not set
+# CONFIG_SECURITY is not set
+# CONFIG_SECURITY_FILE_CAPABILITIES is not set
+CONFIG_CRYPTO=y
+# CONFIG_CRYPTO_SEQIV is not set
+# CONFIG_CRYPTO_MANAGER is not set
+# CONFIG_CRYPTO_HMAC is not set
+# CONFIG_CRYPTO_XCBC is not set
+# CONFIG_CRYPTO_NULL is not set
+# CONFIG_CRYPTO_MD4 is not set
+# CONFIG_CRYPTO_MD5 is not set
+# CONFIG_CRYPTO_SHA1 is not set
+# CONFIG_CRYPTO_SHA256 is not set
+# CONFIG_CRYPTO_SHA512 is not set
+# CONFIG_CRYPTO_WP512 is not set
+# CONFIG_CRYPTO_TGR192 is not set
+# CONFIG_CRYPTO_GF128MUL is not set
+# CONFIG_CRYPTO_ECB is not set
+# CONFIG_CRYPTO_CBC is not set
+# CONFIG_CRYPTO_PCBC is not set
+# CONFIG_CRYPTO_LRW is not set
+# CONFIG_CRYPTO_XTS is not set
+# CONFIG_CRYPTO_CTR is not set
+# CONFIG_CRYPTO_GCM is not set
+# CONFIG_CRYPTO_CCM is not set
+# CONFIG_CRYPTO_CRYPTD is not set
+# CONFIG_CRYPTO_DES is not set
+# CONFIG_CRYPTO_FCRYPT is not set
+# CONFIG_CRYPTO_BLOWFISH is not set
+# CONFIG_CRYPTO_TWOFISH is not set
+# CONFIG_CRYPTO_TWOFISH_586 is not set
+# CONFIG_CRYPTO_SERPENT is not set
+# CONFIG_CRYPTO_AES is not set
+# CONFIG_CRYPTO_AES_586 is not set
+# CONFIG_CRYPTO_CAST5 is not set
+# CONFIG_CRYPTO_CAST6 is not set
+# CONFIG_CRYPTO_TEA is not set
+# CONFIG_CRYPTO_ARC4 is not set
+# CONFIG_CRYPTO_KHAZAD is not set
+# CONFIG_CRYPTO_ANUBIS is not set
+# CONFIG_CRYPTO_SEED is not set
+# CONFIG_CRYPTO_SALSA20 is not set
+# CONFIG_CRYPTO_SALSA20_586 is not set
+# CONFIG_CRYPTO_DEFLATE is not set
+# CONFIG_CRYPTO_MICHAEL_MIC is not set
+# CONFIG_CRYPTO_CRC32C is not set
+# CONFIG_CRYPTO_CAMELLIA is not set
+# CONFIG_CRYPTO_TEST is not set
+# CONFIG_CRYPTO_AUTHENC is not set
+# CONFIG_CRYPTO_LZO is not set
+CONFIG_CRYPTO_HW=y
+
+#
+# Library routines
+#
+CONFIG_BITREVERSE=m
+# CONFIG_CRC_CCITT is not set
+# CONFIG_CRC16 is not set
+# CONFIG_CRC_ITU_T is not set
+CONFIG_CRC32=m
+# CONFIG_CRC7 is not set
+# CONFIG_LIBCRC32C is not set
+CONFIG_PLIST=y
+
+#
+# SCSI device support
+#
+# CONFIG_RAID_ATTRS is not set
+# CONFIG_SCSI is not set
+# CONFIG_SCSI_DMA is not set
+# CONFIG_SCSI_NETLINK is not set
+# CONFIG_MD is not set
+# CONFIG_INPUT is not set
+
+#
+# Kernel hacking
+#
+# CONFIG_PRINTK_TIME is not set
+CONFIG_ENABLE_WARN_DEPRECATED=y
+CONFIG_ENABLE_MUST_CHECK=y
+# CONFIG_UNUSED_SYMBOLS is not set
+# CONFIG_DEBUG_FS is not set
+CONFIG_DEBUG_KERNEL=y
+# CONFIG_DEBUG_SHIRQ is not set
+CONFIG_DETECT_SOFTLOCKUP=y
+CONFIG_SCHED_DEBUG=y
+# CONFIG_SCHEDSTATS is not set
+# CONFIG_TIMER_STATS is not set
+# CONFIG_DEBUG_SLAB is not set
+# CONFIG_DEBUG_RT_MUTEXES is not set
+# CONFIG_RT_MUTEX_TESTER is not set
+# CONFIG_DEBUG_SPINLOCK is not set
+# CONFIG_DEBUG_MUTEXES is not set
+# CONFIG_DEBUG_SPINLOCK_SLEEP is not set
+# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
+# CONFIG_DEBUG_KOBJECT is not set
+CONFIG_DEBUG_BUGVERBOSE=y
+CONFIG_DEBUG_INFO=y
+# CONFIG_DEBUG_VM is not set
+# CONFIG_DEBUG_LIST is not set
+# CONFIG_DEBUG_SG is not set
+CONFIG_FRAME_POINTER=y
+CONFIG_FORCED_INLINING=y
+# CONFIG_BOOT_PRINTK_DELAY is not set
+# CONFIG_RCU_TORTURE_TEST is not set
+# CONFIG_BACKTRACE_SELF_TEST is not set
+# CONFIG_FAULT_INJECTION is not set
+# CONFIG_SAMPLES is not set
+# CONFIG_GPROF is not set
+# CONFIG_GCOV is not set
+# CONFIG_DEBUG_STACK_USAGE is not set
diff --git a/arch/um/drivers/Makefile b/arch/um/drivers/Makefile
new file mode 100644
index 00000000000..e7582e1d248
--- /dev/null
+++ b/arch/um/drivers/Makefile
@@ -0,0 +1,67 @@
+#
+# Copyright (C) 2000, 2002, 2003 Jeff Dike (jdike@karaya.com)
+# Licensed under the GPL
+#
+
+# pcap is broken in 2.5 because kbuild doesn't allow pcap.a to be linked
+# in to pcap.o
+
+slip-objs := slip_kern.o slip_user.o
+slirp-objs := slirp_kern.o slirp_user.o
+daemon-objs := daemon_kern.o daemon_user.o
+umcast-objs := umcast_kern.o umcast_user.o
+net-objs := net_kern.o net_user.o
+mconsole-objs := mconsole_kern.o mconsole_user.o
+hostaudio-objs := hostaudio_kern.o
+ubd-objs := ubd_kern.o ubd_user.o
+port-objs := port_kern.o port_user.o
+harddog-objs := harddog_kern.o harddog_user.o
+
+LDFLAGS_pcap.o := -r $(shell $(CC) $(KBUILD_CFLAGS) -print-file-name=libpcap.a)
+
+LDFLAGS_vde.o := -r $(shell $(CC) $(CFLAGS) -print-file-name=libvdeplug.a)
+
+targets := pcap_kern.o pcap_user.o vde_kern.o vde_user.o
+
+$(obj)/pcap.o: $(obj)/pcap_kern.o $(obj)/pcap_user.o
+ $(LD) -r -dp -o $@ $^ $(LDFLAGS) $(LDFLAGS_pcap.o)
+
+$(obj)/vde.o: $(obj)/vde_kern.o $(obj)/vde_user.o
+ $(LD) -r -dp -o $@ $^ $(LDFLAGS) $(LDFLAGS_vde.o)
+
+#XXX: The call below does not work because the flags are added before the
+# object name, so nothing from the library gets linked.
+#$(call if_changed,ld)
+
+# When the above is fixed, don't forget to add this too!
+#targets += $(obj)/pcap.o
+
+obj-y := stdio_console.o fd.o chan_kern.o chan_user.o line.o
+obj-$(CONFIG_SSL) += ssl.o
+obj-$(CONFIG_STDERR_CONSOLE) += stderr_console.o
+
+obj-$(CONFIG_UML_NET_SLIP) += slip.o slip_common.o
+obj-$(CONFIG_UML_NET_SLIRP) += slirp.o slip_common.o
+obj-$(CONFIG_UML_NET_DAEMON) += daemon.o
+obj-$(CONFIG_UML_NET_VDE) += vde.o
+obj-$(CONFIG_UML_NET_MCAST) += umcast.o
+obj-$(CONFIG_UML_NET_PCAP) += pcap.o
+obj-$(CONFIG_UML_NET) += net.o
+obj-$(CONFIG_MCONSOLE) += mconsole.o
+obj-$(CONFIG_MMAPPER) += mmapper_kern.o
+obj-$(CONFIG_BLK_DEV_UBD) += ubd.o
+obj-$(CONFIG_HOSTAUDIO) += hostaudio.o
+obj-$(CONFIG_NULL_CHAN) += null.o
+obj-$(CONFIG_PORT_CHAN) += port.o
+obj-$(CONFIG_PTY_CHAN) += pty.o
+obj-$(CONFIG_TTY_CHAN) += tty.o
+obj-$(CONFIG_XTERM_CHAN) += xterm.o xterm_kern.o
+obj-$(CONFIG_UML_WATCHDOG) += harddog.o
+obj-$(CONFIG_BLK_DEV_COW_COMMON) += cow_user.o
+obj-$(CONFIG_UML_RANDOM) += random.o
+
+# pcap_user.o must be added explicitly.
+USER_OBJS := fd.o null.o pty.o tty.o xterm.o slip_common.o pcap_user.o vde_user.o
+CFLAGS_null.o = -DDEV_NULL=$(DEV_NULL_PATH)
+
+include arch/um/scripts/Makefile.rules
diff --git a/arch/um/drivers/chan.h b/arch/um/drivers/chan.h
new file mode 100644
index 00000000000..8df0fd9024d
--- /dev/null
+++ b/arch/um/drivers/chan.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __CHAN_KERN_H__
+#define __CHAN_KERN_H__
+
+#include <linux/tty.h>
+#include <linux/list.h>
+#include <linux/console.h>
+#include "chan_user.h"
+#include "line.h"
+
+struct chan {
+ struct list_head list;
+ struct list_head free_list;
+ struct line *line;
+ char *dev;
+ unsigned int primary:1;
+ unsigned int input:1;
+ unsigned int output:1;
+ unsigned int opened:1;
+ unsigned int enabled:1;
+ int fd;
+ const struct chan_ops *ops;
+ void *data;
+};
+
+extern void chan_interrupt(struct list_head *chans, struct delayed_work *task,
+ struct tty_struct *tty, int irq);
+extern int parse_chan_pair(char *str, struct line *line, int device,
+ const struct chan_opts *opts, char **error_out);
+extern int write_chan(struct list_head *chans, const char *buf, int len,
+ int write_irq);
+extern int console_write_chan(struct list_head *chans, const char *buf,
+ int len);
+extern int console_open_chan(struct line *line, struct console *co);
+extern void deactivate_chan(struct list_head *chans, int irq);
+extern void reactivate_chan(struct list_head *chans, int irq);
+extern void chan_enable_winch(struct list_head *chans, struct tty_struct *tty);
+extern int enable_chan(struct line *line);
+extern void close_chan(struct list_head *chans, int delay_free_irq);
+extern int chan_window_size(struct list_head *chans,
+ unsigned short *rows_out,
+ unsigned short *cols_out);
+extern int chan_config_string(struct list_head *chans, char *str, int size,
+ char **error_out);
+
+#endif
diff --git a/arch/um/drivers/chan_kern.c b/arch/um/drivers/chan_kern.c
new file mode 100644
index 00000000000..420e2c80079
--- /dev/null
+++ b/arch/um/drivers/chan_kern.c
@@ -0,0 +1,622 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include "chan.h"
+#include "os.h"
+
+#ifdef CONFIG_NOCONFIG_CHAN
+static void *not_configged_init(char *str, int device,
+ const struct chan_opts *opts)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+ return NULL;
+}
+
+static int not_configged_open(int input, int output, int primary, void *data,
+ char **dev_out)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+ return -ENODEV;
+}
+
+static void not_configged_close(int fd, void *data)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+}
+
+static int not_configged_read(int fd, char *c_out, void *data)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+ return -EIO;
+}
+
+static int not_configged_write(int fd, const char *buf, int len, void *data)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+ return -EIO;
+}
+
+static int not_configged_console_write(int fd, const char *buf, int len)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+ return -EIO;
+}
+
+static int not_configged_window_size(int fd, void *data, unsigned short *rows,
+ unsigned short *cols)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+ return -ENODEV;
+}
+
+static void not_configged_free(void *data)
+{
+ printk(KERN_ERR "Using a channel type which is configured out of "
+ "UML\n");
+}
+
+static const struct chan_ops not_configged_ops = {
+ .init = not_configged_init,
+ .open = not_configged_open,
+ .close = not_configged_close,
+ .read = not_configged_read,
+ .write = not_configged_write,
+ .console_write = not_configged_console_write,
+ .window_size = not_configged_window_size,
+ .free = not_configged_free,
+ .winch = 0,
+};
+#endif /* CONFIG_NOCONFIG_CHAN */
+
+static void tty_receive_char(struct tty_struct *tty, char ch)
+{
+ if (tty == NULL)
+ return;
+
+ if (I_IXON(tty) && !I_IXOFF(tty) && !tty->raw) {
+ if (ch == STOP_CHAR(tty)) {
+ stop_tty(tty);
+ return;
+ }
+ else if (ch == START_CHAR(tty)) {
+ start_tty(tty);
+ return;
+ }
+ }
+
+ tty_insert_flip_char(tty, ch, TTY_NORMAL);
+}
+
+static int open_one_chan(struct chan *chan)
+{
+ int fd, err;
+
+ if (chan->opened)
+ return 0;
+
+ if (chan->ops->open == NULL)
+ fd = 0;
+ else fd = (*chan->ops->open)(chan->input, chan->output, chan->primary,
+ chan->data, &chan->dev);
+ if (fd < 0)
+ return fd;
+
+ err = os_set_fd_block(fd, 0);
+ if (err) {
+ (*chan->ops->close)(fd, chan->data);
+ return err;
+ }
+
+ chan->fd = fd;
+
+ chan->opened = 1;
+ return 0;
+}
+
+static int open_chan(struct list_head *chans)
+{
+ struct list_head *ele;
+ struct chan *chan;
+ int ret, err = 0;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+ ret = open_one_chan(chan);
+ if (chan->primary)
+ err = ret;
+ }
+ return err;
+}
+
+void chan_enable_winch(struct list_head *chans, struct tty_struct *tty)
+{
+ struct list_head *ele;
+ struct chan *chan;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+ if (chan->primary && chan->output && chan->ops->winch) {
+ register_winch(chan->fd, tty);
+ return;
+ }
+ }
+}
+
+int enable_chan(struct line *line)
+{
+ struct list_head *ele;
+ struct chan *chan;
+ int err;
+
+ list_for_each(ele, &line->chan_list) {
+ chan = list_entry(ele, struct chan, list);
+ err = open_one_chan(chan);
+ if (err) {
+ if (chan->primary)
+ goto out_close;
+
+ continue;
+ }
+
+ if (chan->enabled)
+ continue;
+ err = line_setup_irq(chan->fd, chan->input, chan->output, line,
+ chan);
+ if (err)
+ goto out_close;
+
+ chan->enabled = 1;
+ }
+
+ return 0;
+
+ out_close:
+ close_chan(&line->chan_list, 0);
+ return err;
+}
+
+/* Items are added in IRQ context, when free_irq can't be called, and
+ * removed in process context, when it can.
+ * This handles interrupt sources which disappear, and which need to
+ * be permanently disabled. This is discovered in IRQ context, but
+ * the freeing of the IRQ must be done later.
+ */
+static DEFINE_SPINLOCK(irqs_to_free_lock);
+static LIST_HEAD(irqs_to_free);
+
+void free_irqs(void)
+{
+ struct chan *chan;
+ LIST_HEAD(list);
+ struct list_head *ele;
+ unsigned long flags;
+
+ spin_lock_irqsave(&irqs_to_free_lock, flags);
+ list_splice_init(&irqs_to_free, &list);
+ spin_unlock_irqrestore(&irqs_to_free_lock, flags);
+
+ list_for_each(ele, &list) {
+ chan = list_entry(ele, struct chan, free_list);
+
+ if (chan->input && chan->enabled)
+ free_irq(chan->line->driver->read_irq, chan);
+ if (chan->output && chan->enabled)
+ free_irq(chan->line->driver->write_irq, chan);
+ chan->enabled = 0;
+ }
+}
+
+static void close_one_chan(struct chan *chan, int delay_free_irq)
+{
+ unsigned long flags;
+
+ if (!chan->opened)
+ return;
+
+ if (delay_free_irq) {
+ spin_lock_irqsave(&irqs_to_free_lock, flags);
+ list_add(&chan->free_list, &irqs_to_free);
+ spin_unlock_irqrestore(&irqs_to_free_lock, flags);
+ }
+ else {
+ if (chan->input && chan->enabled)
+ free_irq(chan->line->driver->read_irq, chan);
+ if (chan->output && chan->enabled)
+ free_irq(chan->line->driver->write_irq, chan);
+ chan->enabled = 0;
+ }
+ if (chan->ops->close != NULL)
+ (*chan->ops->close)(chan->fd, chan->data);
+
+ chan->opened = 0;
+ chan->fd = -1;
+}
+
+void close_chan(struct list_head *chans, int delay_free_irq)
+{
+ struct chan *chan;
+
+ /* Close in reverse order as open in case more than one of them
+ * refers to the same device and they save and restore that device's
+ * state. Then, the first one opened will have the original state,
+ * so it must be the last closed.
+ */
+ list_for_each_entry_reverse(chan, chans, list) {
+ close_one_chan(chan, delay_free_irq);
+ }
+}
+
+void deactivate_chan(struct list_head *chans, int irq)
+{
+ struct list_head *ele;
+
+ struct chan *chan;
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+
+ if (chan->enabled && chan->input)
+ deactivate_fd(chan->fd, irq);
+ }
+}
+
+void reactivate_chan(struct list_head *chans, int irq)
+{
+ struct list_head *ele;
+ struct chan *chan;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+
+ if (chan->enabled && chan->input)
+ reactivate_fd(chan->fd, irq);
+ }
+}
+
+int write_chan(struct list_head *chans, const char *buf, int len,
+ int write_irq)
+{
+ struct list_head *ele;
+ struct chan *chan = NULL;
+ int n, ret = 0;
+
+ if (len == 0)
+ return 0;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+ if (!chan->output || (chan->ops->write == NULL))
+ continue;
+
+ n = chan->ops->write(chan->fd, buf, len, chan->data);
+ if (chan->primary) {
+ ret = n;
+ if ((ret == -EAGAIN) || ((ret >= 0) && (ret < len)))
+ reactivate_fd(chan->fd, write_irq);
+ }
+ }
+ return ret;
+}
+
+int console_write_chan(struct list_head *chans, const char *buf, int len)
+{
+ struct list_head *ele;
+ struct chan *chan;
+ int n, ret = 0;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+ if (!chan->output || (chan->ops->console_write == NULL))
+ continue;
+
+ n = chan->ops->console_write(chan->fd, buf, len);
+ if (chan->primary)
+ ret = n;
+ }
+ return ret;
+}
+
+int console_open_chan(struct line *line, struct console *co)
+{
+ int err;
+
+ err = open_chan(&line->chan_list);
+ if (err)
+ return err;
+
+ printk(KERN_INFO "Console initialized on /dev/%s%d\n", co->name,
+ co->index);
+ return 0;
+}
+
+int chan_window_size(struct list_head *chans, unsigned short *rows_out,
+ unsigned short *cols_out)
+{
+ struct list_head *ele;
+ struct chan *chan;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+ if (chan->primary) {
+ if (chan->ops->window_size == NULL)
+ return 0;
+ return chan->ops->window_size(chan->fd, chan->data,
+ rows_out, cols_out);
+ }
+ }
+ return 0;
+}
+
+static void free_one_chan(struct chan *chan)
+{
+ list_del(&chan->list);
+
+ close_one_chan(chan, 0);
+
+ if (chan->ops->free != NULL)
+ (*chan->ops->free)(chan->data);
+
+ if (chan->primary && chan->output)
+ ignore_sigio_fd(chan->fd);
+ kfree(chan);
+}
+
+static void free_chan(struct list_head *chans)
+{
+ struct list_head *ele, *next;
+ struct chan *chan;
+
+ list_for_each_safe(ele, next, chans) {
+ chan = list_entry(ele, struct chan, list);
+ free_one_chan(chan);
+ }
+}
+
+static int one_chan_config_string(struct chan *chan, char *str, int size,
+ char **error_out)
+{
+ int n = 0;
+
+ if (chan == NULL) {
+ CONFIG_CHUNK(str, size, n, "none", 1);
+ return n;
+ }
+
+ CONFIG_CHUNK(str, size, n, chan->ops->type, 0);
+
+ if (chan->dev == NULL) {
+ CONFIG_CHUNK(str, size, n, "", 1);
+ return n;
+ }
+
+ CONFIG_CHUNK(str, size, n, ":", 0);
+ CONFIG_CHUNK(str, size, n, chan->dev, 0);
+
+ return n;
+}
+
+static int chan_pair_config_string(struct chan *in, struct chan *out,
+ char *str, int size, char **error_out)
+{
+ int n;
+
+ n = one_chan_config_string(in, str, size, error_out);
+ str += n;
+ size -= n;
+
+ if (in == out) {
+ CONFIG_CHUNK(str, size, n, "", 1);
+ return n;
+ }
+
+ CONFIG_CHUNK(str, size, n, ",", 1);
+ n = one_chan_config_string(out, str, size, error_out);
+ str += n;
+ size -= n;
+ CONFIG_CHUNK(str, size, n, "", 1);
+
+ return n;
+}
+
+int chan_config_string(struct list_head *chans, char *str, int size,
+ char **error_out)
+{
+ struct list_head *ele;
+ struct chan *chan, *in = NULL, *out = NULL;
+
+ list_for_each(ele, chans) {
+ chan = list_entry(ele, struct chan, list);
+ if (!chan->primary)
+ continue;
+ if (chan->input)
+ in = chan;
+ if (chan->output)
+ out = chan;
+ }
+
+ return chan_pair_config_string(in, out, str, size, error_out);
+}
+
+struct chan_type {
+ char *key;
+ const struct chan_ops *ops;
+};
+
+static const struct chan_type chan_table[] = {
+ { "fd", &fd_ops },
+
+#ifdef CONFIG_NULL_CHAN
+ { "null", &null_ops },
+#else
+ { "null", &not_configged_ops },
+#endif
+
+#ifdef CONFIG_PORT_CHAN
+ { "port", &port_ops },
+#else
+ { "port", &not_configged_ops },
+#endif
+
+#ifdef CONFIG_PTY_CHAN
+ { "pty", &pty_ops },
+ { "pts", &pts_ops },
+#else
+ { "pty", &not_configged_ops },
+ { "pts", &not_configged_ops },
+#endif
+
+#ifdef CONFIG_TTY_CHAN
+ { "tty", &tty_ops },
+#else
+ { "tty", &not_configged_ops },
+#endif
+
+#ifdef CONFIG_XTERM_CHAN
+ { "xterm", &xterm_ops },
+#else
+ { "xterm", &not_configged_ops },
+#endif
+};
+
+static struct chan *parse_chan(struct line *line, char *str, int device,
+ const struct chan_opts *opts, char **error_out)
+{
+ const struct chan_type *entry;
+ const struct chan_ops *ops;
+ struct chan *chan;
+ void *data;
+ int i;
+
+ ops = NULL;
+ data = NULL;
+ for(i = 0; i < ARRAY_SIZE(chan_table); i++) {
+ entry = &chan_table[i];
+ if (!strncmp(str, entry->key, strlen(entry->key))) {
+ ops = entry->ops;
+ str += strlen(entry->key);
+ break;
+ }
+ }
+ if (ops == NULL) {
+ *error_out = "No match for configured backends";
+ return NULL;
+ }
+
+ data = (*ops->init)(str, device, opts);
+ if (data == NULL) {
+ *error_out = "Configuration failed";
+ return NULL;
+ }
+
+ chan = kmalloc(sizeof(*chan), GFP_ATOMIC);
+ if (chan == NULL) {
+ *error_out = "Memory allocation failed";
+ return NULL;
+ }
+ *chan = ((struct chan) { .list = LIST_HEAD_INIT(chan->list),
+ .free_list =
+ LIST_HEAD_INIT(chan->free_list),
+ .line = line,
+ .primary = 1,
+ .input = 0,
+ .output = 0,
+ .opened = 0,
+ .enabled = 0,
+ .fd = -1,
+ .ops = ops,
+ .data = data });
+ return chan;
+}
+
+int parse_chan_pair(char *str, struct line *line, int device,
+ const struct chan_opts *opts, char **error_out)
+{
+ struct list_head *chans = &line->chan_list;
+ struct chan *new;
+ char *in, *out;
+
+ if (!list_empty(chans)) {
+ free_chan(chans);
+ INIT_LIST_HEAD(chans);
+ }
+
+ out = strchr(str, ',');
+ if (out != NULL) {
+ in = str;
+ *out = '\0';
+ out++;
+ new = parse_chan(line, in, device, opts, error_out);
+ if (new == NULL)
+ return -1;
+
+ new->input = 1;
+ list_add(&new->list, chans);
+
+ new = parse_chan(line, out, device, opts, error_out);
+ if (new == NULL)
+ return -1;
+
+ list_add(&new->list, chans);
+ new->output = 1;
+ }
+ else {
+ new = parse_chan(line, str, device, opts, error_out);
+ if (new == NULL)
+ return -1;
+
+ list_add(&new->list, chans);
+ new->input = 1;
+ new->output = 1;
+ }
+ return 0;
+}
+
+void chan_interrupt(struct list_head *chans, struct delayed_work *task,
+ struct tty_struct *tty, int irq)
+{
+ struct list_head *ele, *next;
+ struct chan *chan;
+ int err;
+ char c;
+
+ list_for_each_safe(ele, next, chans) {
+ chan = list_entry(ele, struct chan, list);
+ if (!chan->input || (chan->ops->read == NULL))
+ continue;
+ do {
+ if (tty && !tty_buffer_request_room(tty, 1)) {
+ schedule_delayed_work(task, 1);
+ goto out;
+ }
+ err = chan->ops->read(chan->fd, &c, chan->data);
+ if (err > 0)
+ tty_receive_char(tty, c);
+ } while (err > 0);
+
+ if (err == 0)
+ reactivate_fd(chan->fd, irq);
+ if (err == -EIO) {
+ if (chan->primary) {
+ if (tty != NULL)
+ tty_hangup(tty);
+ close_chan(chans, 1);
+ return;
+ }
+ else close_one_chan(chan, 1);
+ }
+ }
+ out:
+ if (tty)
+ tty_flip_buffer_push(tty);
+}
diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c
new file mode 100644
index 00000000000..f180813ce2c
--- /dev/null
+++ b/arch/um/drivers/chan_user.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sched.h>
+#include <signal.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include "chan_user.h"
+#include "os.h"
+#include "um_malloc.h"
+
+void generic_close(int fd, void *unused)
+{
+ close(fd);
+}
+
+int generic_read(int fd, char *c_out, void *unused)
+{
+ int n;
+
+ n = read(fd, c_out, sizeof(*c_out));
+ if (n > 0)
+ return n;
+ else if (errno == EAGAIN)
+ return 0;
+ else if (n == 0)
+ return -EIO;
+ return -errno;
+}
+
+/* XXX Trivial wrapper around write */
+
+int generic_write(int fd, const char *buf, int n, void *unused)
+{
+ int err;
+
+ err = write(fd, buf, n);
+ if (err > 0)
+ return err;
+ else if (errno == EAGAIN)
+ return 0;
+ else if (err == 0)
+ return -EIO;
+ return -errno;
+}
+
+int generic_window_size(int fd, void *unused, unsigned short *rows_out,
+ unsigned short *cols_out)
+{
+ struct winsize size;
+ int ret;
+
+ if (ioctl(fd, TIOCGWINSZ, &size) < 0)
+ return -errno;
+
+ ret = ((*rows_out != size.ws_row) || (*cols_out != size.ws_col));
+
+ *rows_out = size.ws_row;
+ *cols_out = size.ws_col;
+
+ return ret;
+}
+
+void generic_free(void *data)
+{
+ kfree(data);
+}
+
+int generic_console_write(int fd, const char *buf, int n)
+{
+ sigset_t old, no_sigio;
+ struct termios save, new;
+ int err;
+
+ if (isatty(fd)) {
+ sigemptyset(&no_sigio);
+ sigaddset(&no_sigio, SIGIO);
+ if (sigprocmask(SIG_BLOCK, &no_sigio, &old))
+ goto error;
+
+ CATCH_EINTR(err = tcgetattr(fd, &save));
+ if (err)
+ goto error;
+ new = save;
+ /*
+ * The terminal becomes a bit less raw, to handle \n also as
+ * "Carriage Return", not only as "New Line". Otherwise, the new
+ * line won't start at the first column.
+ */
+ new.c_oflag |= OPOST;
+ CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &new));
+ if (err)
+ goto error;
+ }
+ err = generic_write(fd, buf, n, NULL);
+ /*
+ * Restore raw mode, in any case; we *must* ignore any error apart
+ * EINTR, except for debug.
+ */
+ if (isatty(fd)) {
+ CATCH_EINTR(tcsetattr(fd, TCSAFLUSH, &save));
+ sigprocmask(SIG_SETMASK, &old, NULL);
+ }
+
+ return err;
+error:
+ return -errno;
+}
+
+/*
+ * UML SIGWINCH handling
+ *
+ * The point of this is to handle SIGWINCH on consoles which have host
+ * ttys and relay them inside UML to whatever might be running on the
+ * console and cares about the window size (since SIGWINCH notifies
+ * about terminal size changes).
+ *
+ * So, we have a separate thread for each host tty attached to a UML
+ * device (side-issue - I'm annoyed that one thread can't have
+ * multiple controlling ttys for the purpose of handling SIGWINCH, but
+ * I imagine there are other reasons that doesn't make any sense).
+ *
+ * SIGWINCH can't be received synchronously, so you have to set up to
+ * receive it as a signal. That being the case, if you are going to
+ * wait for it, it is convenient to sit in sigsuspend() and wait for
+ * the signal to bounce you out of it (see below for how we make sure
+ * to exit only on SIGWINCH).
+ */
+
+static void winch_handler(int sig)
+{
+}
+
+struct winch_data {
+ int pty_fd;
+ int pipe_fd;
+};
+
+static int winch_thread(void *arg)
+{
+ struct winch_data *data = arg;
+ sigset_t sigs;
+ int pty_fd, pipe_fd;
+ int count;
+ char c = 1;
+
+ pty_fd = data->pty_fd;
+ pipe_fd = data->pipe_fd;
+ count = write(pipe_fd, &c, sizeof(c));
+ if (count != sizeof(c))
+ printk(UM_KERN_ERR "winch_thread : failed to write "
+ "synchronization byte, err = %d\n", -count);
+
+ /*
+ * We are not using SIG_IGN on purpose, so don't fix it as I thought to
+ * do! If using SIG_IGN, the sigsuspend() call below would not stop on
+ * SIGWINCH.
+ */
+
+ signal(SIGWINCH, winch_handler);
+ sigfillset(&sigs);
+ /* Block all signals possible. */
+ if (sigprocmask(SIG_SETMASK, &sigs, NULL) < 0) {
+ printk(UM_KERN_ERR "winch_thread : sigprocmask failed, "
+ "errno = %d\n", errno);
+ exit(1);
+ }
+ /* In sigsuspend(), block anything else than SIGWINCH. */
+ sigdelset(&sigs, SIGWINCH);
+
+ if (setsid() < 0) {
+ printk(UM_KERN_ERR "winch_thread : setsid failed, errno = %d\n",
+ errno);
+ exit(1);
+ }
+
+ if (ioctl(pty_fd, TIOCSCTTY, 0) < 0) {
+ printk(UM_KERN_ERR "winch_thread : TIOCSCTTY failed on "
+ "fd %d err = %d\n", pty_fd, errno);
+ exit(1);
+ }
+
+ if (tcsetpgrp(pty_fd, os_getpid()) < 0) {
+ printk(UM_KERN_ERR "winch_thread : tcsetpgrp failed on "
+ "fd %d err = %d\n", pty_fd, errno);
+ exit(1);
+ }
+
+ /*
+ * These are synchronization calls between various UML threads on the
+ * host - since they are not different kernel threads, we cannot use
+ * kernel semaphores. We don't use SysV semaphores because they are
+ * persistent.
+ */
+ count = read(pipe_fd, &c, sizeof(c));
+ if (count != sizeof(c))
+ printk(UM_KERN_ERR "winch_thread : failed to read "
+ "synchronization byte, err = %d\n", errno);
+
+ while(1) {
+ /*
+ * This will be interrupted by SIGWINCH only, since
+ * other signals are blocked.
+ */
+ sigsuspend(&sigs);
+
+ count = write(pipe_fd, &c, sizeof(c));
+ if (count != sizeof(c))
+ printk(UM_KERN_ERR "winch_thread : write failed, "
+ "err = %d\n", errno);
+ }
+}
+
+static int winch_tramp(int fd, struct tty_struct *tty, int *fd_out,
+ unsigned long *stack_out)
+{
+ struct winch_data data;
+ int fds[2], n, err;
+ char c;
+
+ err = os_pipe(fds, 1, 1);
+ if (err < 0) {
+ printk(UM_KERN_ERR "winch_tramp : os_pipe failed, err = %d\n",
+ -err);
+ goto out;
+ }
+
+ data = ((struct winch_data) { .pty_fd = fd,
+ .pipe_fd = fds[1] } );
+ /*
+ * CLONE_FILES so this thread doesn't hold open files which are open
+ * now, but later closed in a different thread. This is a
+ * problem with /dev/net/tun, which if held open by this
+ * thread, prevents the TUN/TAP device from being reused.
+ */
+ err = run_helper_thread(winch_thread, &data, CLONE_FILES, stack_out);
+ if (err < 0) {
+ printk(UM_KERN_ERR "fork of winch_thread failed - errno = %d\n",
+ -err);
+ goto out_close;
+ }
+
+ *fd_out = fds[0];
+ n = read(fds[0], &c, sizeof(c));
+ if (n != sizeof(c)) {
+ printk(UM_KERN_ERR "winch_tramp : failed to read "
+ "synchronization byte\n");
+ printk(UM_KERN_ERR "read failed, err = %d\n", errno);
+ printk(UM_KERN_ERR "fd %d will not support SIGWINCH\n", fd);
+ err = -EINVAL;
+ goto out_close;
+ }
+
+ if (os_set_fd_block(*fd_out, 0)) {
+ printk(UM_KERN_ERR "winch_tramp: failed to set thread_fd "
+ "non-blocking.\n");
+ goto out_close;
+ }
+
+ return err;
+
+ out_close:
+ close(fds[1]);
+ close(fds[0]);
+ out:
+ return err;
+}
+
+void register_winch(int fd, struct tty_struct *tty)
+{
+ unsigned long stack;
+ int pid, thread, count, thread_fd = -1;
+ char c = 1;
+
+ if (!isatty(fd))
+ return;
+
+ pid = tcgetpgrp(fd);
+ if (is_skas_winch(pid, fd, tty)) {
+ register_winch_irq(-1, fd, -1, tty, 0);
+ return;
+ }
+
+ if (pid == -1) {
+ thread = winch_tramp(fd, tty, &thread_fd, &stack);
+ if (thread < 0)
+ return;
+
+ register_winch_irq(thread_fd, fd, thread, tty, stack);
+
+ count = write(thread_fd, &c, sizeof(c));
+ if (count != sizeof(c))
+ printk(UM_KERN_ERR "register_winch : failed to write "
+ "synchronization byte, err = %d\n", errno);
+ }
+}
diff --git a/arch/um/drivers/chan_user.h b/arch/um/drivers/chan_user.h
new file mode 100644
index 00000000000..9b9ced85b70
--- /dev/null
+++ b/arch/um/drivers/chan_user.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __CHAN_USER_H__
+#define __CHAN_USER_H__
+
+#include "init.h"
+
+struct chan_opts {
+ void (*const announce)(char *dev_name, int dev);
+ char *xterm_title;
+ const int raw;
+};
+
+enum chan_init_pri { INIT_STATIC, INIT_ALL, INIT_ONE };
+
+struct chan_ops {
+ char *type;
+ void *(*init)(char *, int, const struct chan_opts *);
+ int (*open)(int, int, int, void *, char **);
+ void (*close)(int, void *);
+ int (*read)(int, char *, void *);
+ int (*write)(int, const char *, int, void *);
+ int (*console_write)(int, const char *, int);
+ int (*window_size)(int, void *, unsigned short *, unsigned short *);
+ void (*free)(void *);
+ int winch;
+};
+
+extern const struct chan_ops fd_ops, null_ops, port_ops, pts_ops, pty_ops,
+ tty_ops, xterm_ops;
+
+extern void generic_close(int fd, void *unused);
+extern int generic_read(int fd, char *c_out, void *unused);
+extern int generic_write(int fd, const char *buf, int n, void *unused);
+extern int generic_console_write(int fd, const char *buf, int n);
+extern int generic_window_size(int fd, void *unused, unsigned short *rows_out,
+ unsigned short *cols_out);
+extern void generic_free(void *data);
+
+struct tty_struct;
+extern void register_winch(int fd, struct tty_struct *tty);
+extern void register_winch_irq(int fd, int tty_fd, int pid,
+ struct tty_struct *tty, unsigned long stack);
+
+#define __channel_help(fn, prefix) \
+__uml_help(fn, prefix "[0-9]*=<channel description>\n" \
+" Attach a console or serial line to a host channel. See\n" \
+" http://user-mode-linux.sourceforge.net/old/input.html for a complete\n" \
+" description of this switch.\n\n" \
+);
+
+#endif
diff --git a/arch/um/drivers/cow.h b/arch/um/drivers/cow.h
new file mode 100644
index 00000000000..dc36b222100
--- /dev/null
+++ b/arch/um/drivers/cow.h
@@ -0,0 +1,67 @@
+#ifndef __COW_H__
+#define __COW_H__
+
+#include <asm/types.h>
+
+#if defined(__KERNEL__)
+
+# include <asm/byteorder.h>
+
+# if defined(__BIG_ENDIAN)
+# define ntohll(x) (x)
+# define htonll(x) (x)
+# elif defined(__LITTLE_ENDIAN)
+# define ntohll(x) be64_to_cpu(x)
+# define htonll(x) cpu_to_be64(x)
+# else
+# error "Could not determine byte order"
+# endif
+
+#else
+/* For the definition of ntohl, htonl and __BYTE_ORDER */
+#include <endian.h>
+#include <netinet/in.h>
+#if defined(__BYTE_ORDER)
+
+# if __BYTE_ORDER == __BIG_ENDIAN
+# define ntohll(x) (x)
+# define htonll(x) (x)
+# elif __BYTE_ORDER == __LITTLE_ENDIAN
+# define ntohll(x) bswap_64(x)
+# define htonll(x) bswap_64(x)
+# else
+# error "Could not determine byte order: __BYTE_ORDER uncorrectly defined"
+# endif
+
+#else /* ! defined(__BYTE_ORDER) */
+# error "Could not determine byte order: __BYTE_ORDER not defined"
+#endif
+#endif /* ! defined(__KERNEL__) */
+
+extern int init_cow_file(int fd, char *cow_file, char *backing_file,
+ int sectorsize, int alignment, int *bitmap_offset_out,
+ unsigned long *bitmap_len_out, int *data_offset_out);
+
+extern int file_reader(__u64 offset, char *buf, int len, void *arg);
+extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
+ void *arg, __u32 *version_out,
+ char **backing_file_out, time_t *mtime_out,
+ unsigned long long *size_out, int *sectorsize_out,
+ __u32 *align_out, int *bitmap_offset_out);
+
+extern int write_cow_header(char *cow_file, int fd, char *backing_file,
+ int sectorsize, int alignment,
+ unsigned long long *size);
+
+extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
+ int bitmap_offset, unsigned long *bitmap_len_out,
+ int *data_offset_out);
+
+#endif
+
+/*
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/drivers/cow_sys.h b/arch/um/drivers/cow_sys.h
new file mode 100644
index 00000000000..7f2ed0b8824
--- /dev/null
+++ b/arch/um/drivers/cow_sys.h
@@ -0,0 +1,40 @@
+#ifndef __COW_SYS_H__
+#define __COW_SYS_H__
+
+#include "kern_util.h"
+#include "os.h"
+#include "um_malloc.h"
+
+static inline void *cow_malloc(int size)
+{
+ return uml_kmalloc(size, UM_GFP_KERNEL);
+}
+
+static inline void cow_free(void *ptr)
+{
+ kfree(ptr);
+}
+
+#define cow_printf printk
+
+static inline char *cow_strdup(char *str)
+{
+ return uml_strdup(str);
+}
+
+static inline int cow_seek_file(int fd, __u64 offset)
+{
+ return os_seek_file(fd, offset);
+}
+
+static inline int cow_file_size(char *file, unsigned long long *size_out)
+{
+ return os_file_size(file, size_out);
+}
+
+static inline int cow_write_file(int fd, void *buf, int size)
+{
+ return os_write_file(fd, buf, size);
+}
+
+#endif
diff --git a/arch/um/drivers/cow_user.c b/arch/um/drivers/cow_user.c
new file mode 100644
index 00000000000..9cbb426c0b9
--- /dev/null
+++ b/arch/um/drivers/cow_user.c
@@ -0,0 +1,444 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+/*
+ * _XOPEN_SOURCE is needed for pread, but we define _GNU_SOURCE, which defines
+ * that.
+ */
+#include <unistd.h>
+#include <byteswap.h>
+#include <errno.h>
+#include <string.h>
+#include <arpa/inet.h>
+#include <asm/types.h>
+#include "cow.h"
+#include "cow_sys.h"
+
+#define PATH_LEN_V1 256
+
+typedef __u32 time32_t;
+
+struct cow_header_v1 {
+ __s32 magic;
+ __s32 version;
+ char backing_file[PATH_LEN_V1];
+ time32_t mtime;
+ __u64 size;
+ __s32 sectorsize;
+} __attribute__((packed));
+
+/*
+ * Define PATH_LEN_V3 as the usual value of MAXPATHLEN, just hard-code it in
+ * case other systems have different values for MAXPATHLEN.
+ *
+ * The same must hold for V2 - we want file format compatibility, not anything
+ * else.
+ */
+#define PATH_LEN_V3 4096
+#define PATH_LEN_V2 PATH_LEN_V3
+
+struct cow_header_v2 {
+ __u32 magic;
+ __u32 version;
+ char backing_file[PATH_LEN_V2];
+ time32_t mtime;
+ __u64 size;
+ __s32 sectorsize;
+} __attribute__((packed));
+
+/*
+ * Changes from V2 -
+ * PATH_LEN_V3 as described above
+ * Explicitly specify field bit lengths for systems with different
+ * lengths for the usual C types. Not sure whether char or
+ * time_t should be changed, this can be changed later without
+ * breaking compatibility
+ * Add alignment field so that different alignments can be used for the
+ * bitmap and data
+ * Add cow_format field to allow for the possibility of different ways
+ * of specifying the COW blocks. For now, the only value is 0,
+ * for the traditional COW bitmap.
+ * Move the backing_file field to the end of the header. This allows
+ * for the possibility of expanding it into the padding required
+ * by the bitmap alignment.
+ * The bitmap and data portions of the file will be aligned as specified
+ * by the alignment field. This is to allow COW files to be
+ * put on devices with restrictions on access alignments, such as
+ * /dev/raw, with a 512 byte alignment restriction. This also
+ * allows the data to be more aligned more strictly than on
+ * sector boundaries. This is needed for ubd-mmap, which needs
+ * the data to be page aligned.
+ * Fixed (finally!) the rounding bug
+ */
+
+/*
+ * Until Dec2005, __attribute__((packed)) was left out from the below
+ * definition, leading on 64-bit systems to 4 bytes of padding after mtime, to
+ * align size to 8-byte alignment. This shifted all fields above (no padding
+ * was present on 32-bit, no other padding was added).
+ *
+ * However, this _can be detected_: it means that cow_format (always 0 until
+ * now) is shifted onto the first 4 bytes of backing_file, where it is otherwise
+ * impossible to find 4 zeros. -bb */
+
+struct cow_header_v3 {
+ __u32 magic;
+ __u32 version;
+ __u32 mtime;
+ __u64 size;
+ __u32 sectorsize;
+ __u32 alignment;
+ __u32 cow_format;
+ char backing_file[PATH_LEN_V3];
+} __attribute__((packed));
+
+/* This is the broken layout used by some 64-bit binaries. */
+struct cow_header_v3_broken {
+ __u32 magic;
+ __u32 version;
+ __s64 mtime;
+ __u64 size;
+ __u32 sectorsize;
+ __u32 alignment;
+ __u32 cow_format;
+ char backing_file[PATH_LEN_V3];
+};
+
+/* COW format definitions - for now, we have only the usual COW bitmap */
+#define COW_BITMAP 0
+
+union cow_header {
+ struct cow_header_v1 v1;
+ struct cow_header_v2 v2;
+ struct cow_header_v3 v3;
+ struct cow_header_v3_broken v3_b;
+};
+
+#define COW_MAGIC 0x4f4f4f4d /* MOOO */
+#define COW_VERSION 3
+
+#define DIV_ROUND(x, len) (((x) + (len) - 1) / (len))
+#define ROUND_UP(x, align) DIV_ROUND(x, align) * (align)
+
+void cow_sizes(int version, __u64 size, int sectorsize, int align,
+ int bitmap_offset, unsigned long *bitmap_len_out,
+ int *data_offset_out)
+{
+ if (version < 3) {
+ *bitmap_len_out = (size + sectorsize - 1) / (8 * sectorsize);
+
+ *data_offset_out = bitmap_offset + *bitmap_len_out;
+ *data_offset_out = (*data_offset_out + sectorsize - 1) /
+ sectorsize;
+ *data_offset_out *= sectorsize;
+ }
+ else {
+ *bitmap_len_out = DIV_ROUND(size, sectorsize);
+ *bitmap_len_out = DIV_ROUND(*bitmap_len_out, 8);
+
+ *data_offset_out = bitmap_offset + *bitmap_len_out;
+ *data_offset_out = ROUND_UP(*data_offset_out, align);
+ }
+}
+
+static int absolutize(char *to, int size, char *from)
+{
+ char save_cwd[256], *slash;
+ int remaining;
+
+ if (getcwd(save_cwd, sizeof(save_cwd)) == NULL) {
+ cow_printf("absolutize : unable to get cwd - errno = %d\n",
+ errno);
+ return -1;
+ }
+ slash = strrchr(from, '/');
+ if (slash != NULL) {
+ *slash = '\0';
+ if (chdir(from)) {
+ *slash = '/';
+ cow_printf("absolutize : Can't cd to '%s' - "
+ "errno = %d\n", from, errno);
+ return -1;
+ }
+ *slash = '/';
+ if (getcwd(to, size) == NULL) {
+ cow_printf("absolutize : unable to get cwd of '%s' - "
+ "errno = %d\n", from, errno);
+ return -1;
+ }
+ remaining = size - strlen(to);
+ if (strlen(slash) + 1 > remaining) {
+ cow_printf("absolutize : unable to fit '%s' into %d "
+ "chars\n", from, size);
+ return -1;
+ }
+ strcat(to, slash);
+ }
+ else {
+ if (strlen(save_cwd) + 1 + strlen(from) + 1 > size) {
+ cow_printf("absolutize : unable to fit '%s' into %d "
+ "chars\n", from, size);
+ return -1;
+ }
+ strcpy(to, save_cwd);
+ strcat(to, "/");
+ strcat(to, from);
+ }
+ if (chdir(save_cwd)) {
+ cow_printf("absolutize : Can't cd to '%s' - "
+ "errno = %d\n", save_cwd, errno);
+ return -1;
+ }
+ return 0;
+}
+
+int write_cow_header(char *cow_file, int fd, char *backing_file,
+ int sectorsize, int alignment, unsigned long long *size)
+{
+ struct cow_header_v3 *header;
+ unsigned long modtime;
+ int err;
+
+ err = cow_seek_file(fd, 0);
+ if (err < 0) {
+ cow_printf("write_cow_header - lseek failed, err = %d\n", -err);
+ goto out;
+ }
+
+ err = -ENOMEM;
+ header = cow_malloc(sizeof(*header));
+ if (header == NULL) {
+ cow_printf("write_cow_header - failed to allocate COW V3 "
+ "header\n");
+ goto out;
+ }
+ header->magic = htonl(COW_MAGIC);
+ header->version = htonl(COW_VERSION);
+
+ err = -EINVAL;
+ if (strlen(backing_file) > sizeof(header->backing_file) - 1) {
+ /* Below, %zd is for a size_t value */
+ cow_printf("Backing file name \"%s\" is too long - names are "
+ "limited to %zd characters\n", backing_file,
+ sizeof(header->backing_file) - 1);
+ goto out_free;
+ }
+
+ if (absolutize(header->backing_file, sizeof(header->backing_file),
+ backing_file))
+ goto out_free;
+
+ err = os_file_modtime(header->backing_file, &modtime);
+ if (err < 0) {
+ cow_printf("write_cow_header - backing file '%s' mtime "
+ "request failed, err = %d\n", header->backing_file,
+ -err);
+ goto out_free;
+ }
+
+ err = cow_file_size(header->backing_file, size);
+ if (err < 0) {
+ cow_printf("write_cow_header - couldn't get size of "
+ "backing file '%s', err = %d\n",
+ header->backing_file, -err);
+ goto out_free;
+ }
+
+ header->mtime = htonl(modtime);
+ header->size = htonll(*size);
+ header->sectorsize = htonl(sectorsize);
+ header->alignment = htonl(alignment);
+ header->cow_format = COW_BITMAP;
+
+ err = cow_write_file(fd, header, sizeof(*header));
+ if (err != sizeof(*header)) {
+ cow_printf("write_cow_header - write of header to "
+ "new COW file '%s' failed, err = %d\n", cow_file,
+ -err);
+ goto out_free;
+ }
+ err = 0;
+ out_free:
+ cow_free(header);
+ out:
+ return err;
+}
+
+int file_reader(__u64 offset, char *buf, int len, void *arg)
+{
+ int fd = *((int *) arg);
+
+ return pread(fd, buf, len, offset);
+}
+
+/* XXX Need to sanity-check the values read from the header */
+
+int read_cow_header(int (*reader)(__u64, char *, int, void *), void *arg,
+ __u32 *version_out, char **backing_file_out,
+ time_t *mtime_out, unsigned long long *size_out,
+ int *sectorsize_out, __u32 *align_out,
+ int *bitmap_offset_out)
+{
+ union cow_header *header;
+ char *file;
+ int err, n;
+ unsigned long version, magic;
+
+ header = cow_malloc(sizeof(*header));
+ if (header == NULL) {
+ cow_printf("read_cow_header - Failed to allocate header\n");
+ return -ENOMEM;
+ }
+ err = -EINVAL;
+ n = (*reader)(0, (char *) header, sizeof(*header), arg);
+ if (n < offsetof(typeof(header->v1), backing_file)) {
+ cow_printf("read_cow_header - short header\n");
+ goto out;
+ }
+
+ magic = header->v1.magic;
+ if (magic == COW_MAGIC)
+ version = header->v1.version;
+ else if (magic == ntohl(COW_MAGIC))
+ version = ntohl(header->v1.version);
+ /* No error printed because the non-COW case comes through here */
+ else goto out;
+
+ *version_out = version;
+
+ if (version == 1) {
+ if (n < sizeof(header->v1)) {
+ cow_printf("read_cow_header - failed to read V1 "
+ "header\n");
+ goto out;
+ }
+ *mtime_out = header->v1.mtime;
+ *size_out = header->v1.size;
+ *sectorsize_out = header->v1.sectorsize;
+ *bitmap_offset_out = sizeof(header->v1);
+ *align_out = *sectorsize_out;
+ file = header->v1.backing_file;
+ }
+ else if (version == 2) {
+ if (n < sizeof(header->v2)) {
+ cow_printf("read_cow_header - failed to read V2 "
+ "header\n");
+ goto out;
+ }
+ *mtime_out = ntohl(header->v2.mtime);
+ *size_out = ntohll(header->v2.size);
+ *sectorsize_out = ntohl(header->v2.sectorsize);
+ *bitmap_offset_out = sizeof(header->v2);
+ *align_out = *sectorsize_out;
+ file = header->v2.backing_file;
+ }
+ /* This is very subtle - see above at union cow_header definition */
+ else if (version == 3 && (*((int*)header->v3.backing_file) != 0)) {
+ if (n < sizeof(header->v3)) {
+ cow_printf("read_cow_header - failed to read V3 "
+ "header\n");
+ goto out;
+ }
+ *mtime_out = ntohl(header->v3.mtime);
+ *size_out = ntohll(header->v3.size);
+ *sectorsize_out = ntohl(header->v3.sectorsize);
+ *align_out = ntohl(header->v3.alignment);
+ if (*align_out == 0) {
+ cow_printf("read_cow_header - invalid COW header, "
+ "align == 0\n");
+ }
+ *bitmap_offset_out = ROUND_UP(sizeof(header->v3), *align_out);
+ file = header->v3.backing_file;
+ }
+ else if (version == 3) {
+ cow_printf("read_cow_header - broken V3 file with"
+ " 64-bit layout - recovering content.\n");
+
+ if (n < sizeof(header->v3_b)) {
+ cow_printf("read_cow_header - failed to read V3 "
+ "header\n");
+ goto out;
+ }
+
+ /*
+ * this was used until Dec2005 - 64bits are needed to represent
+ * 2038+. I.e. we can safely do this truncating cast.
+ *
+ * Additionally, we must use ntohl() instead of ntohll(), since
+ * the program used to use the former (tested - I got mtime
+ * mismatch "0 vs whatever").
+ *
+ * Ever heard about bug-to-bug-compatibility ? ;-) */
+ *mtime_out = (time32_t) ntohl(header->v3_b.mtime);
+
+ *size_out = ntohll(header->v3_b.size);
+ *sectorsize_out = ntohl(header->v3_b.sectorsize);
+ *align_out = ntohl(header->v3_b.alignment);
+ if (*align_out == 0) {
+ cow_printf("read_cow_header - invalid COW header, "
+ "align == 0\n");
+ }
+ *bitmap_offset_out = ROUND_UP(sizeof(header->v3_b), *align_out);
+ file = header->v3_b.backing_file;
+ }
+ else {
+ cow_printf("read_cow_header - invalid COW version\n");
+ goto out;
+ }
+ err = -ENOMEM;
+ *backing_file_out = cow_strdup(file);
+ if (*backing_file_out == NULL) {
+ cow_printf("read_cow_header - failed to allocate backing "
+ "file\n");
+ goto out;
+ }
+ err = 0;
+ out:
+ cow_free(header);
+ return err;
+}
+
+int init_cow_file(int fd, char *cow_file, char *backing_file, int sectorsize,
+ int alignment, int *bitmap_offset_out,
+ unsigned long *bitmap_len_out, int *data_offset_out)
+{
+ unsigned long long size, offset;
+ char zero = 0;
+ int err;
+
+ err = write_cow_header(cow_file, fd, backing_file, sectorsize,
+ alignment, &size);
+ if (err)
+ goto out;
+
+ *bitmap_offset_out = ROUND_UP(sizeof(struct cow_header_v3), alignment);
+ cow_sizes(COW_VERSION, size, sectorsize, alignment, *bitmap_offset_out,
+ bitmap_len_out, data_offset_out);
+
+ offset = *data_offset_out + size - sizeof(zero);
+ err = cow_seek_file(fd, offset);
+ if (err < 0) {
+ cow_printf("cow bitmap lseek failed : err = %d\n", -err);
+ goto out;
+ }
+
+ /*
+ * does not really matter how much we write it is just to set EOF
+ * this also sets the entire COW bitmap
+ * to zero without having to allocate it
+ */
+ err = cow_write_file(fd, &zero, sizeof(zero));
+ if (err != sizeof(zero)) {
+ cow_printf("Write of bitmap to new COW file '%s' failed, "
+ "err = %d\n", cow_file, -err);
+ if (err >= 0)
+ err = -EINVAL;
+ goto out;
+ }
+
+ return 0;
+ out:
+ return err;
+}
diff --git a/arch/um/drivers/daemon.h b/arch/um/drivers/daemon.h
new file mode 100644
index 00000000000..6e0e891f8a0
--- /dev/null
+++ b/arch/um/drivers/daemon.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __DAEMON_H__
+#define __DAEMON_H__
+
+#include "net_user.h"
+
+#define SWITCH_VERSION 3
+
+struct daemon_data {
+ char *sock_type;
+ char *ctl_sock;
+ void *ctl_addr;
+ void *data_addr;
+ void *local_addr;
+ int fd;
+ int control;
+ void *dev;
+};
+
+extern const struct net_user_info daemon_user_info;
+
+extern int daemon_user_write(int fd, void *buf, int len,
+ struct daemon_data *pri);
+
+#endif
diff --git a/arch/um/drivers/daemon_kern.c b/arch/um/drivers/daemon_kern.c
new file mode 100644
index 00000000000..b4a1522f215
--- /dev/null
+++ b/arch/um/drivers/daemon_kern.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ * Licensed under the GPL.
+ */
+
+#include "linux/init.h"
+#include <linux/netdevice.h>
+#include "net_kern.h"
+#include "daemon.h"
+
+struct daemon_init {
+ char *sock_type;
+ char *ctl_sock;
+};
+
+static void daemon_init(struct net_device *dev, void *data)
+{
+ struct uml_net_private *pri;
+ struct daemon_data *dpri;
+ struct daemon_init *init = data;
+
+ pri = netdev_priv(dev);
+ dpri = (struct daemon_data *) pri->user;
+ dpri->sock_type = init->sock_type;
+ dpri->ctl_sock = init->ctl_sock;
+ dpri->fd = -1;
+ dpri->control = -1;
+ dpri->dev = dev;
+ /* We will free this pointer. If it contains crap we're burned. */
+ dpri->ctl_addr = NULL;
+ dpri->data_addr = NULL;
+ dpri->local_addr = NULL;
+
+ printk("daemon backend (uml_switch version %d) - %s:%s",
+ SWITCH_VERSION, dpri->sock_type, dpri->ctl_sock);
+ printk("\n");
+}
+
+static int daemon_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return net_recvfrom(fd, skb_mac_header(skb),
+ skb->dev->mtu + ETH_HEADER_OTHER);
+}
+
+static int daemon_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return daemon_user_write(fd, skb->data, skb->len,
+ (struct daemon_data *) &lp->user);
+}
+
+static const struct net_kern_info daemon_kern_info = {
+ .init = daemon_init,
+ .protocol = eth_protocol,
+ .read = daemon_read,
+ .write = daemon_write,
+};
+
+static int daemon_setup(char *str, char **mac_out, void *data)
+{
+ struct daemon_init *init = data;
+ char *remain;
+
+ *init = ((struct daemon_init)
+ { .sock_type = "unix",
+ .ctl_sock = "/tmp/uml.ctl" });
+
+ remain = split_if_spec(str, mac_out, &init->sock_type, &init->ctl_sock,
+ NULL);
+ if (remain != NULL)
+ printk(KERN_WARNING "daemon_setup : Ignoring data socket "
+ "specification\n");
+
+ return 1;
+}
+
+static struct transport daemon_transport = {
+ .list = LIST_HEAD_INIT(daemon_transport.list),
+ .name = "daemon",
+ .setup = daemon_setup,
+ .user = &daemon_user_info,
+ .kern = &daemon_kern_info,
+ .private_size = sizeof(struct daemon_data),
+ .setup_size = sizeof(struct daemon_init),
+};
+
+static int register_daemon(void)
+{
+ register_transport(&daemon_transport);
+ return 0;
+}
+
+late_initcall(register_daemon);
diff --git a/arch/um/drivers/daemon_user.c b/arch/um/drivers/daemon_user.c
new file mode 100644
index 00000000000..a4fd7bc14af
--- /dev/null
+++ b/arch/um/drivers/daemon_user.c
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ * Licensed under the GPL.
+ */
+
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/un.h>
+#include "daemon.h"
+#include "net_user.h"
+#include "os.h"
+#include "um_malloc.h"
+
+enum request_type { REQ_NEW_CONTROL };
+
+#define SWITCH_MAGIC 0xfeedface
+
+struct request_v3 {
+ uint32_t magic;
+ uint32_t version;
+ enum request_type type;
+ struct sockaddr_un sock;
+};
+
+static struct sockaddr_un *new_addr(void *name, int len)
+{
+ struct sockaddr_un *sun;
+
+ sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
+ if (sun == NULL) {
+ printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
+ "failed\n");
+ return NULL;
+ }
+ sun->sun_family = AF_UNIX;
+ memcpy(sun->sun_path, name, len);
+ return sun;
+}
+
+static int connect_to_switch(struct daemon_data *pri)
+{
+ struct sockaddr_un *ctl_addr = pri->ctl_addr;
+ struct sockaddr_un *local_addr = pri->local_addr;
+ struct sockaddr_un *sun;
+ struct request_v3 req;
+ int fd, n, err;
+
+ pri->control = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (pri->control < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "daemon_open : control socket failed, "
+ "errno = %d\n", -err);
+ return err;
+ }
+
+ if (connect(pri->control, (struct sockaddr *) ctl_addr,
+ sizeof(*ctl_addr)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "daemon_open : control connect failed, "
+ "errno = %d\n", -err);
+ goto out;
+ }
+
+ fd = socket(AF_UNIX, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "daemon_open : data socket failed, "
+ "errno = %d\n", -err);
+ goto out;
+ }
+ if (bind(fd, (struct sockaddr *) local_addr, sizeof(*local_addr)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "daemon_open : data bind failed, "
+ "errno = %d\n", -err);
+ goto out_close;
+ }
+
+ sun = uml_kmalloc(sizeof(struct sockaddr_un), UM_GFP_KERNEL);
+ if (sun == NULL) {
+ printk(UM_KERN_ERR "new_addr: allocation of sockaddr_un "
+ "failed\n");
+ err = -ENOMEM;
+ goto out_close;
+ }
+
+ req.magic = SWITCH_MAGIC;
+ req.version = SWITCH_VERSION;
+ req.type = REQ_NEW_CONTROL;
+ req.sock = *local_addr;
+ n = write(pri->control, &req, sizeof(req));
+ if (n != sizeof(req)) {
+ printk(UM_KERN_ERR "daemon_open : control setup request "
+ "failed, err = %d\n", -errno);
+ err = -ENOTCONN;
+ goto out_free;
+ }
+
+ n = read(pri->control, sun, sizeof(*sun));
+ if (n != sizeof(*sun)) {
+ printk(UM_KERN_ERR "daemon_open : read of data socket failed, "
+ "err = %d\n", -errno);
+ err = -ENOTCONN;
+ goto out_free;
+ }
+
+ pri->data_addr = sun;
+ return fd;
+
+ out_free:
+ kfree(sun);
+ out_close:
+ close(fd);
+ out:
+ close(pri->control);
+ return err;
+}
+
+static int daemon_user_init(void *data, void *dev)
+{
+ struct daemon_data *pri = data;
+ struct timeval tv;
+ struct {
+ char zero;
+ int pid;
+ int usecs;
+ } name;
+
+ if (!strcmp(pri->sock_type, "unix"))
+ pri->ctl_addr = new_addr(pri->ctl_sock,
+ strlen(pri->ctl_sock) + 1);
+ name.zero = 0;
+ name.pid = os_getpid();
+ gettimeofday(&tv, NULL);
+ name.usecs = tv.tv_usec;
+ pri->local_addr = new_addr(&name, sizeof(name));
+ pri->dev = dev;
+ pri->fd = connect_to_switch(pri);
+ if (pri->fd < 0) {
+ kfree(pri->local_addr);
+ pri->local_addr = NULL;
+ return pri->fd;
+ }
+
+ return 0;
+}
+
+static int daemon_open(void *data)
+{
+ struct daemon_data *pri = data;
+ return pri->fd;
+}
+
+static void daemon_remove(void *data)
+{
+ struct daemon_data *pri = data;
+
+ close(pri->fd);
+ pri->fd = -1;
+ close(pri->control);
+ pri->control = -1;
+
+ kfree(pri->data_addr);
+ pri->data_addr = NULL;
+ kfree(pri->ctl_addr);
+ pri->ctl_addr = NULL;
+ kfree(pri->local_addr);
+ pri->local_addr = NULL;
+}
+
+int daemon_user_write(int fd, void *buf, int len, struct daemon_data *pri)
+{
+ struct sockaddr_un *data_addr = pri->data_addr;
+
+ return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
+}
+
+const struct net_user_info daemon_user_info = {
+ .init = daemon_user_init,
+ .open = daemon_open,
+ .close = NULL,
+ .remove = daemon_remove,
+ .add_address = NULL,
+ .delete_address = NULL,
+ .mtu = ETH_MAX_PACKET,
+ .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
+};
diff --git a/arch/um/drivers/fd.c b/arch/um/drivers/fd.c
new file mode 100644
index 00000000000..5b81d257441
--- /dev/null
+++ b/arch/um/drivers/fd.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <termios.h>
+#include "chan_user.h"
+#include "os.h"
+#include "um_malloc.h"
+
+struct fd_chan {
+ int fd;
+ int raw;
+ struct termios tt;
+ char str[sizeof("1234567890\0")];
+};
+
+static void *fd_init(char *str, int device, const struct chan_opts *opts)
+{
+ struct fd_chan *data;
+ char *end;
+ int n;
+
+ if (*str != ':') {
+ printk(UM_KERN_ERR "fd_init : channel type 'fd' must specify a "
+ "file descriptor\n");
+ return NULL;
+ }
+ str++;
+ n = strtoul(str, &end, 0);
+ if ((*end != '\0') || (end == str)) {
+ printk(UM_KERN_ERR "fd_init : couldn't parse file descriptor "
+ "'%s'\n", str);
+ return NULL;
+ }
+
+ data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
+ if (data == NULL)
+ return NULL;
+
+ *data = ((struct fd_chan) { .fd = n,
+ .raw = opts->raw });
+ return data;
+}
+
+static int fd_open(int input, int output, int primary, void *d, char **dev_out)
+{
+ struct fd_chan *data = d;
+ int err;
+
+ if (data->raw && isatty(data->fd)) {
+ CATCH_EINTR(err = tcgetattr(data->fd, &data->tt));
+ if (err)
+ return err;
+
+ err = raw(data->fd);
+ if (err)
+ return err;
+ }
+ sprintf(data->str, "%d", data->fd);
+ *dev_out = data->str;
+ return data->fd;
+}
+
+static void fd_close(int fd, void *d)
+{
+ struct fd_chan *data = d;
+ int err;
+
+ if (!data->raw || !isatty(fd))
+ return;
+
+ CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt));
+ if (err)
+ printk(UM_KERN_ERR "Failed to restore terminal state - "
+ "errno = %d\n", -err);
+ data->raw = 0;
+}
+
+const struct chan_ops fd_ops = {
+ .type = "fd",
+ .init = fd_init,
+ .open = fd_open,
+ .close = fd_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = generic_free,
+ .winch = 1,
+};
diff --git a/arch/um/drivers/harddog_kern.c b/arch/um/drivers/harddog_kern.c
new file mode 100644
index 00000000000..2d0266d0254
--- /dev/null
+++ b/arch/um/drivers/harddog_kern.c
@@ -0,0 +1,201 @@
+/* UML hardware watchdog, shamelessly stolen from:
+ *
+ * SoftDog 0.05: A Software Watchdog Device
+ *
+ * (c) Copyright 1996 Alan Cox <alan@redhat.com>, All Rights Reserved.
+ * http://www.redhat.com
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * Neither Alan Cox nor CymruNet Ltd. admit liability nor provide
+ * warranty for any of this software. This material is provided
+ * "AS-IS" and at no charge.
+ *
+ * (c) Copyright 1995 Alan Cox <alan@lxorguk.ukuu.org.uk>
+ *
+ * Software only watchdog driver. Unlike its big brother the WDT501P
+ * driver this won't always recover a failed machine.
+ *
+ * 03/96: Angelo Haritsis <ah@doc.ic.ac.uk> :
+ * Modularised.
+ * Added soft_margin; use upon insmod to change the timer delay.
+ * NB: uses same minor as wdt (WATCHDOG_MINOR); we could use separate
+ * minors.
+ *
+ * 19980911 Alan Cox
+ * Made SMP safe for 2.3.x
+ *
+ * 20011127 Joel Becker (jlbec@evilplan.org>
+ * Added soft_noboot; Allows testing the softdog trigger without
+ * requiring a recompile.
+ * Added WDIOC_GETTIMEOUT and WDIOC_SETTIMOUT.
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/miscdevice.h>
+#include <linux/watchdog.h>
+#include <linux/reboot.h>
+#include <linux/mutex.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+#include "mconsole.h"
+
+MODULE_LICENSE("GPL");
+
+static DEFINE_MUTEX(harddog_mutex);
+static DEFINE_SPINLOCK(lock);
+static int timer_alive;
+static int harddog_in_fd = -1;
+static int harddog_out_fd = -1;
+
+/*
+ * Allow only one person to hold it open
+ */
+
+extern int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock);
+
+static int harddog_open(struct inode *inode, struct file *file)
+{
+ int err = -EBUSY;
+ char *sock = NULL;
+
+ mutex_lock(&harddog_mutex);
+ spin_lock(&lock);
+ if(timer_alive)
+ goto err;
+#ifdef CONFIG_WATCHDOG_NOWAYOUT
+ __module_get(THIS_MODULE);
+#endif
+
+#ifdef CONFIG_MCONSOLE
+ sock = mconsole_notify_socket();
+#endif
+ err = start_watchdog(&harddog_in_fd, &harddog_out_fd, sock);
+ if(err)
+ goto err;
+
+ timer_alive = 1;
+ spin_unlock(&lock);
+ mutex_unlock(&harddog_mutex);
+ return nonseekable_open(inode, file);
+err:
+ spin_unlock(&lock);
+ mutex_unlock(&harddog_mutex);
+ return err;
+}
+
+extern void stop_watchdog(int in_fd, int out_fd);
+
+static int harddog_release(struct inode *inode, struct file *file)
+{
+ /*
+ * Shut off the timer.
+ */
+
+ spin_lock(&lock);
+
+ stop_watchdog(harddog_in_fd, harddog_out_fd);
+ harddog_in_fd = -1;
+ harddog_out_fd = -1;
+
+ timer_alive=0;
+ spin_unlock(&lock);
+
+ return 0;
+}
+
+extern int ping_watchdog(int fd);
+
+static ssize_t harddog_write(struct file *file, const char __user *data, size_t len,
+ loff_t *ppos)
+{
+ /*
+ * Refresh the timer.
+ */
+ if(len)
+ return ping_watchdog(harddog_out_fd);
+ return 0;
+}
+
+static int harddog_ioctl_unlocked(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp= (void __user *)arg;
+ static struct watchdog_info ident = {
+ WDIOC_SETTIMEOUT,
+ 0,
+ "UML Hardware Watchdog"
+ };
+ switch (cmd) {
+ default:
+ return -ENOTTY;
+ case WDIOC_GETSUPPORT:
+ if(copy_to_user(argp, &ident, sizeof(ident)))
+ return -EFAULT;
+ return 0;
+ case WDIOC_GETSTATUS:
+ case WDIOC_GETBOOTSTATUS:
+ return put_user(0,(int __user *)argp);
+ case WDIOC_KEEPALIVE:
+ return ping_watchdog(harddog_out_fd);
+ }
+}
+
+static long harddog_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ long ret;
+
+ mutex_lock(&harddog_mutex);
+ ret = harddog_ioctl_unlocked(file, cmd, arg);
+ mutex_unlock(&harddog_mutex);
+
+ return ret;
+}
+
+static const struct file_operations harddog_fops = {
+ .owner = THIS_MODULE,
+ .write = harddog_write,
+ .unlocked_ioctl = harddog_ioctl,
+ .open = harddog_open,
+ .release = harddog_release,
+ .llseek = no_llseek,
+};
+
+static struct miscdevice harddog_miscdev = {
+ .minor = WATCHDOG_MINOR,
+ .name = "watchdog",
+ .fops = &harddog_fops,
+};
+
+static char banner[] __initdata = KERN_INFO "UML Watchdog Timer\n";
+
+static int __init harddog_init(void)
+{
+ int ret;
+
+ ret = misc_register(&harddog_miscdev);
+
+ if (ret)
+ return ret;
+
+ printk(banner);
+
+ return 0;
+}
+
+static void __exit harddog_exit(void)
+{
+ misc_deregister(&harddog_miscdev);
+}
+
+module_init(harddog_init);
+module_exit(harddog_exit);
diff --git a/arch/um/drivers/harddog_user.c b/arch/um/drivers/harddog_user.c
new file mode 100644
index 00000000000..0345d6206d4
--- /dev/null
+++ b/arch/um/drivers/harddog_user.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include "os.h"
+
+struct dog_data {
+ int stdin;
+ int stdout;
+ int close_me[2];
+};
+
+static void pre_exec(void *d)
+{
+ struct dog_data *data = d;
+
+ dup2(data->stdin, 0);
+ dup2(data->stdout, 1);
+ dup2(data->stdout, 2);
+ close(data->stdin);
+ close(data->stdout);
+ close(data->close_me[0]);
+ close(data->close_me[1]);
+}
+
+int start_watchdog(int *in_fd_ret, int *out_fd_ret, char *sock)
+{
+ struct dog_data data;
+ int in_fds[2], out_fds[2], pid, n, err;
+ char pid_buf[sizeof("nnnnnnn\0")], c;
+ char *pid_args[] = { "/usr/bin/uml_watchdog", "-pid", pid_buf, NULL };
+ char *mconsole_args[] = { "/usr/bin/uml_watchdog", "-mconsole", NULL,
+ NULL };
+ char **args = NULL;
+
+ err = os_pipe(in_fds, 1, 0);
+ if (err < 0) {
+ printk("harddog_open - os_pipe failed, err = %d\n", -err);
+ goto out;
+ }
+
+ err = os_pipe(out_fds, 1, 0);
+ if (err < 0) {
+ printk("harddog_open - os_pipe failed, err = %d\n", -err);
+ goto out_close_in;
+ }
+
+ data.stdin = out_fds[0];
+ data.stdout = in_fds[1];
+ data.close_me[0] = out_fds[1];
+ data.close_me[1] = in_fds[0];
+
+ if (sock != NULL) {
+ mconsole_args[2] = sock;
+ args = mconsole_args;
+ }
+ else {
+ /* XXX The os_getpid() is not SMP correct */
+ sprintf(pid_buf, "%d", os_getpid());
+ args = pid_args;
+ }
+
+ pid = run_helper(pre_exec, &data, args);
+
+ close(out_fds[0]);
+ close(in_fds[1]);
+
+ if (pid < 0) {
+ err = -pid;
+ printk("harddog_open - run_helper failed, errno = %d\n", -err);
+ goto out_close_out;
+ }
+
+ n = read(in_fds[0], &c, sizeof(c));
+ if (n == 0) {
+ printk("harddog_open - EOF on watchdog pipe\n");
+ helper_wait(pid);
+ err = -EIO;
+ goto out_close_out;
+ }
+ else if (n < 0) {
+ printk("harddog_open - read of watchdog pipe failed, "
+ "err = %d\n", errno);
+ helper_wait(pid);
+ err = n;
+ goto out_close_out;
+ }
+ *in_fd_ret = in_fds[0];
+ *out_fd_ret = out_fds[1];
+ return 0;
+
+ out_close_in:
+ close(in_fds[0]);
+ close(in_fds[1]);
+ out_close_out:
+ close(out_fds[0]);
+ close(out_fds[1]);
+ out:
+ return err;
+}
+
+void stop_watchdog(int in_fd, int out_fd)
+{
+ close(in_fd);
+ close(out_fd);
+}
+
+int ping_watchdog(int fd)
+{
+ int n;
+ char c = '\n';
+
+ n = write(fd, &c, sizeof(c));
+ if (n != sizeof(c)) {
+ printk("ping_watchdog - write failed, ret = %d, err = %d\n",
+ n, errno);
+ if (n < 0)
+ return n;
+ return -EIO;
+ }
+ return 1;
+
+}
diff --git a/arch/um/drivers/hostaudio_kern.c b/arch/um/drivers/hostaudio_kern.c
new file mode 100644
index 00000000000..f9f6a4e2059
--- /dev/null
+++ b/arch/um/drivers/hostaudio_kern.c
@@ -0,0 +1,358 @@
+/*
+ * Copyright (C) 2002 Steve Schmidtke
+ * Licensed under the GPL
+ */
+
+#include "linux/fs.h"
+#include "linux/module.h"
+#include "linux/slab.h"
+#include "linux/sound.h"
+#include "linux/soundcard.h"
+#include "linux/mutex.h"
+#include "asm/uaccess.h"
+#include "init.h"
+#include "os.h"
+
+struct hostaudio_state {
+ int fd;
+};
+
+struct hostmixer_state {
+ int fd;
+};
+
+#define HOSTAUDIO_DEV_DSP "/dev/sound/dsp"
+#define HOSTAUDIO_DEV_MIXER "/dev/sound/mixer"
+
+/*
+ * Changed either at boot time or module load time. At boot, this is
+ * single-threaded; at module load, multiple modules would each have
+ * their own copy of these variables.
+ */
+static char *dsp = HOSTAUDIO_DEV_DSP;
+static char *mixer = HOSTAUDIO_DEV_MIXER;
+
+#define DSP_HELP \
+" This is used to specify the host dsp device to the hostaudio driver.\n" \
+" The default is \"" HOSTAUDIO_DEV_DSP "\".\n\n"
+
+#define MIXER_HELP \
+" This is used to specify the host mixer device to the hostaudio driver.\n"\
+" The default is \"" HOSTAUDIO_DEV_MIXER "\".\n\n"
+
+module_param(dsp, charp, 0644);
+MODULE_PARM_DESC(dsp, DSP_HELP);
+module_param(mixer, charp, 0644);
+MODULE_PARM_DESC(mixer, MIXER_HELP);
+
+#ifndef MODULE
+static int set_dsp(char *name, int *add)
+{
+ dsp = name;
+ return 0;
+}
+
+__uml_setup("dsp=", set_dsp, "dsp=<dsp device>\n" DSP_HELP);
+
+static int set_mixer(char *name, int *add)
+{
+ mixer = name;
+ return 0;
+}
+
+__uml_setup("mixer=", set_mixer, "mixer=<mixer device>\n" MIXER_HELP);
+#endif
+
+static DEFINE_MUTEX(hostaudio_mutex);
+
+/* /dev/dsp file operations */
+
+static ssize_t hostaudio_read(struct file *file, char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct hostaudio_state *state = file->private_data;
+ void *kbuf;
+ int err;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostaudio: read called, count = %d\n", count);
+#endif
+
+ kbuf = kmalloc(count, GFP_KERNEL);
+ if (kbuf == NULL)
+ return -ENOMEM;
+
+ err = os_read_file(state->fd, kbuf, count);
+ if (err < 0)
+ goto out;
+
+ if (copy_to_user(buffer, kbuf, err))
+ err = -EFAULT;
+
+out:
+ kfree(kbuf);
+ return err;
+}
+
+static ssize_t hostaudio_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ struct hostaudio_state *state = file->private_data;
+ void *kbuf;
+ int err;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostaudio: write called, count = %d\n", count);
+#endif
+
+ kbuf = kmalloc(count, GFP_KERNEL);
+ if (kbuf == NULL)
+ return -ENOMEM;
+
+ err = -EFAULT;
+ if (copy_from_user(kbuf, buffer, count))
+ goto out;
+
+ err = os_write_file(state->fd, kbuf, count);
+ if (err < 0)
+ goto out;
+ *ppos += err;
+
+ out:
+ kfree(kbuf);
+ return err;
+}
+
+static unsigned int hostaudio_poll(struct file *file,
+ struct poll_table_struct *wait)
+{
+ unsigned int mask = 0;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostaudio: poll called (unimplemented)\n");
+#endif
+
+ return mask;
+}
+
+static long hostaudio_ioctl(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct hostaudio_state *state = file->private_data;
+ unsigned long data = 0;
+ int err;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostaudio: ioctl called, cmd = %u\n", cmd);
+#endif
+ switch(cmd){
+ case SNDCTL_DSP_SPEED:
+ case SNDCTL_DSP_STEREO:
+ case SNDCTL_DSP_GETBLKSIZE:
+ case SNDCTL_DSP_CHANNELS:
+ case SNDCTL_DSP_SUBDIVIDE:
+ case SNDCTL_DSP_SETFRAGMENT:
+ if (get_user(data, (int __user *) arg))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ err = os_ioctl_generic(state->fd, cmd, (unsigned long) &data);
+
+ switch(cmd){
+ case SNDCTL_DSP_SPEED:
+ case SNDCTL_DSP_STEREO:
+ case SNDCTL_DSP_GETBLKSIZE:
+ case SNDCTL_DSP_CHANNELS:
+ case SNDCTL_DSP_SUBDIVIDE:
+ case SNDCTL_DSP_SETFRAGMENT:
+ if (put_user(data, (int __user *) arg))
+ return -EFAULT;
+ break;
+ default:
+ break;
+ }
+
+ return err;
+}
+
+static int hostaudio_open(struct inode *inode, struct file *file)
+{
+ struct hostaudio_state *state;
+ int r = 0, w = 0;
+ int ret;
+
+#ifdef DEBUG
+ kparam_block_sysfs_write(dsp);
+ printk(KERN_DEBUG "hostaudio: open called (host: %s)\n", dsp);
+ kparam_unblock_sysfs_write(dsp);
+#endif
+
+ state = kmalloc(sizeof(struct hostaudio_state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+
+ if (file->f_mode & FMODE_READ)
+ r = 1;
+ if (file->f_mode & FMODE_WRITE)
+ w = 1;
+
+ kparam_block_sysfs_write(dsp);
+ mutex_lock(&hostaudio_mutex);
+ ret = os_open_file(dsp, of_set_rw(OPENFLAGS(), r, w), 0);
+ mutex_unlock(&hostaudio_mutex);
+ kparam_unblock_sysfs_write(dsp);
+
+ if (ret < 0) {
+ kfree(state);
+ return ret;
+ }
+ state->fd = ret;
+ file->private_data = state;
+ return 0;
+}
+
+static int hostaudio_release(struct inode *inode, struct file *file)
+{
+ struct hostaudio_state *state = file->private_data;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostaudio: release called\n");
+#endif
+ os_close_file(state->fd);
+ kfree(state);
+
+ return 0;
+}
+
+/* /dev/mixer file operations */
+
+static long hostmixer_ioctl_mixdev(struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct hostmixer_state *state = file->private_data;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostmixer: ioctl called\n");
+#endif
+
+ return os_ioctl_generic(state->fd, cmd, arg);
+}
+
+static int hostmixer_open_mixdev(struct inode *inode, struct file *file)
+{
+ struct hostmixer_state *state;
+ int r = 0, w = 0;
+ int ret;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostmixer: open called (host: %s)\n", mixer);
+#endif
+
+ state = kmalloc(sizeof(struct hostmixer_state), GFP_KERNEL);
+ if (state == NULL)
+ return -ENOMEM;
+
+ if (file->f_mode & FMODE_READ)
+ r = 1;
+ if (file->f_mode & FMODE_WRITE)
+ w = 1;
+
+ kparam_block_sysfs_write(mixer);
+ mutex_lock(&hostaudio_mutex);
+ ret = os_open_file(mixer, of_set_rw(OPENFLAGS(), r, w), 0);
+ mutex_unlock(&hostaudio_mutex);
+ kparam_unblock_sysfs_write(mixer);
+
+ if (ret < 0) {
+ kparam_block_sysfs_write(dsp);
+ printk(KERN_ERR "hostaudio_open_mixdev failed to open '%s', "
+ "err = %d\n", dsp, -ret);
+ kparam_unblock_sysfs_write(dsp);
+ kfree(state);
+ return ret;
+ }
+
+ file->private_data = state;
+ return 0;
+}
+
+static int hostmixer_release(struct inode *inode, struct file *file)
+{
+ struct hostmixer_state *state = file->private_data;
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "hostmixer: release called\n");
+#endif
+
+ os_close_file(state->fd);
+ kfree(state);
+
+ return 0;
+}
+
+/* kernel module operations */
+
+static const struct file_operations hostaudio_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = hostaudio_read,
+ .write = hostaudio_write,
+ .poll = hostaudio_poll,
+ .unlocked_ioctl = hostaudio_ioctl,
+ .mmap = NULL,
+ .open = hostaudio_open,
+ .release = hostaudio_release,
+};
+
+static const struct file_operations hostmixer_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .unlocked_ioctl = hostmixer_ioctl_mixdev,
+ .open = hostmixer_open_mixdev,
+ .release = hostmixer_release,
+};
+
+struct {
+ int dev_audio;
+ int dev_mixer;
+} module_data;
+
+MODULE_AUTHOR("Steve Schmidtke");
+MODULE_DESCRIPTION("UML Audio Relay");
+MODULE_LICENSE("GPL");
+
+static int __init hostaudio_init_module(void)
+{
+ __kernel_param_lock();
+ printk(KERN_INFO "UML Audio Relay (host dsp = %s, host mixer = %s)\n",
+ dsp, mixer);
+ __kernel_param_unlock();
+
+ module_data.dev_audio = register_sound_dsp(&hostaudio_fops, -1);
+ if (module_data.dev_audio < 0) {
+ printk(KERN_ERR "hostaudio: couldn't register DSP device!\n");
+ return -ENODEV;
+ }
+
+ module_data.dev_mixer = register_sound_mixer(&hostmixer_fops, -1);
+ if (module_data.dev_mixer < 0) {
+ printk(KERN_ERR "hostmixer: couldn't register mixer "
+ "device!\n");
+ unregister_sound_dsp(module_data.dev_audio);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit hostaudio_cleanup_module (void)
+{
+ unregister_sound_mixer(module_data.dev_mixer);
+ unregister_sound_dsp(module_data.dev_audio);
+}
+
+module_init(hostaudio_init_module);
+module_exit(hostaudio_cleanup_module);
diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
new file mode 100644
index 00000000000..c1cf2206b84
--- /dev/null
+++ b/arch/um/drivers/line.c
@@ -0,0 +1,883 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/irqreturn.h"
+#include "linux/kd.h"
+#include "linux/sched.h"
+#include "linux/slab.h"
+#include "chan.h"
+#include "irq_kern.h"
+#include "irq_user.h"
+#include "kern_util.h"
+#include "os.h"
+
+#define LINE_BUFSIZE 4096
+
+static irqreturn_t line_interrupt(int irq, void *data)
+{
+ struct chan *chan = data;
+ struct line *line = chan->line;
+
+ if (line)
+ chan_interrupt(&line->chan_list, &line->task, line->tty, irq);
+ return IRQ_HANDLED;
+}
+
+static void line_timer_cb(struct work_struct *work)
+{
+ struct line *line = container_of(work, struct line, task.work);
+
+ if (!line->throttled)
+ chan_interrupt(&line->chan_list, &line->task, line->tty,
+ line->driver->read_irq);
+}
+
+/*
+ * Returns the free space inside the ring buffer of this line.
+ *
+ * Should be called while holding line->lock (this does not modify data).
+ */
+static int write_room(struct line *line)
+{
+ int n;
+
+ if (line->buffer == NULL)
+ return LINE_BUFSIZE - 1;
+
+ /* This is for the case where the buffer is wrapped! */
+ n = line->head - line->tail;
+
+ if (n <= 0)
+ n += LINE_BUFSIZE; /* The other case */
+ return n - 1;
+}
+
+int line_write_room(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+ unsigned long flags;
+ int room;
+
+ spin_lock_irqsave(&line->lock, flags);
+ room = write_room(line);
+ spin_unlock_irqrestore(&line->lock, flags);
+
+ return room;
+}
+
+int line_chars_in_buffer(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+ unsigned long flags;
+ int ret;
+
+ spin_lock_irqsave(&line->lock, flags);
+ /* write_room subtracts 1 for the needed NULL, so we readd it.*/
+ ret = LINE_BUFSIZE - (write_room(line) + 1);
+ spin_unlock_irqrestore(&line->lock, flags);
+
+ return ret;
+}
+
+/*
+ * This copies the content of buf into the circular buffer associated with
+ * this line.
+ * The return value is the number of characters actually copied, i.e. the ones
+ * for which there was space: this function is not supposed to ever flush out
+ * the circular buffer.
+ *
+ * Must be called while holding line->lock!
+ */
+static int buffer_data(struct line *line, const char *buf, int len)
+{
+ int end, room;
+
+ if (line->buffer == NULL) {
+ line->buffer = kmalloc(LINE_BUFSIZE, GFP_ATOMIC);
+ if (line->buffer == NULL) {
+ printk(KERN_ERR "buffer_data - atomic allocation "
+ "failed\n");
+ return 0;
+ }
+ line->head = line->buffer;
+ line->tail = line->buffer;
+ }
+
+ room = write_room(line);
+ len = (len > room) ? room : len;
+
+ end = line->buffer + LINE_BUFSIZE - line->tail;
+
+ if (len < end) {
+ memcpy(line->tail, buf, len);
+ line->tail += len;
+ }
+ else {
+ /* The circular buffer is wrapping */
+ memcpy(line->tail, buf, end);
+ buf += end;
+ memcpy(line->buffer, buf, len - end);
+ line->tail = line->buffer + len - end;
+ }
+
+ return len;
+}
+
+/*
+ * Flushes the ring buffer to the output channels. That is, write_chan is
+ * called, passing it line->head as buffer, and an appropriate count.
+ *
+ * On exit, returns 1 when the buffer is empty,
+ * 0 when the buffer is not empty on exit,
+ * and -errno when an error occurred.
+ *
+ * Must be called while holding line->lock!*/
+static int flush_buffer(struct line *line)
+{
+ int n, count;
+
+ if ((line->buffer == NULL) || (line->head == line->tail))
+ return 1;
+
+ if (line->tail < line->head) {
+ /* line->buffer + LINE_BUFSIZE is the end of the buffer! */
+ count = line->buffer + LINE_BUFSIZE - line->head;
+
+ n = write_chan(&line->chan_list, line->head, count,
+ line->driver->write_irq);
+ if (n < 0)
+ return n;
+ if (n == count) {
+ /*
+ * We have flushed from ->head to buffer end, now we
+ * must flush only from the beginning to ->tail.
+ */
+ line->head = line->buffer;
+ } else {
+ line->head += n;
+ return 0;
+ }
+ }
+
+ count = line->tail - line->head;
+ n = write_chan(&line->chan_list, line->head, count,
+ line->driver->write_irq);
+
+ if (n < 0)
+ return n;
+
+ line->head += n;
+ return line->head == line->tail;
+}
+
+void line_flush_buffer(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&line->lock, flags);
+ flush_buffer(line);
+ spin_unlock_irqrestore(&line->lock, flags);
+}
+
+/*
+ * We map both ->flush_chars and ->put_char (which go in pair) onto
+ * ->flush_buffer and ->write. Hope it's not that bad.
+ */
+void line_flush_chars(struct tty_struct *tty)
+{
+ line_flush_buffer(tty);
+}
+
+int line_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ return line_write(tty, &ch, sizeof(ch));
+}
+
+int line_write(struct tty_struct *tty, const unsigned char *buf, int len)
+{
+ struct line *line = tty->driver_data;
+ unsigned long flags;
+ int n, ret = 0;
+
+ spin_lock_irqsave(&line->lock, flags);
+ if (line->head != line->tail)
+ ret = buffer_data(line, buf, len);
+ else {
+ n = write_chan(&line->chan_list, buf, len,
+ line->driver->write_irq);
+ if (n < 0) {
+ ret = n;
+ goto out_up;
+ }
+
+ len -= n;
+ ret += n;
+ if (len > 0)
+ ret += buffer_data(line, buf + n, len);
+ }
+out_up:
+ spin_unlock_irqrestore(&line->lock, flags);
+ return ret;
+}
+
+void line_set_termios(struct tty_struct *tty, struct ktermios * old)
+{
+ /* nothing */
+}
+
+static const struct {
+ int cmd;
+ char *level;
+ char *name;
+} tty_ioctls[] = {
+ /* don't print these, they flood the log ... */
+ { TCGETS, NULL, "TCGETS" },
+ { TCSETS, NULL, "TCSETS" },
+ { TCSETSW, NULL, "TCSETSW" },
+ { TCFLSH, NULL, "TCFLSH" },
+ { TCSBRK, NULL, "TCSBRK" },
+
+ /* general tty stuff */
+ { TCSETSF, KERN_DEBUG, "TCSETSF" },
+ { TCGETA, KERN_DEBUG, "TCGETA" },
+ { TIOCMGET, KERN_DEBUG, "TIOCMGET" },
+ { TCSBRKP, KERN_DEBUG, "TCSBRKP" },
+ { TIOCMSET, KERN_DEBUG, "TIOCMSET" },
+
+ /* linux-specific ones */
+ { TIOCLINUX, KERN_INFO, "TIOCLINUX" },
+ { KDGKBMODE, KERN_INFO, "KDGKBMODE" },
+ { KDGKBTYPE, KERN_INFO, "KDGKBTYPE" },
+ { KDSIGACCEPT, KERN_INFO, "KDSIGACCEPT" },
+};
+
+int line_ioctl(struct tty_struct *tty, unsigned int cmd,
+ unsigned long arg)
+{
+ int ret;
+ int i;
+
+ ret = 0;
+ switch(cmd) {
+#ifdef TIOCGETP
+ case TIOCGETP:
+ case TIOCSETP:
+ case TIOCSETN:
+#endif
+#ifdef TIOCGETC
+ case TIOCGETC:
+ case TIOCSETC:
+#endif
+#ifdef TIOCGLTC
+ case TIOCGLTC:
+ case TIOCSLTC:
+#endif
+ /* Note: these are out of date as we now have TCGETS2 etc but this
+ whole lot should probably go away */
+ case TCGETS:
+ case TCSETSF:
+ case TCSETSW:
+ case TCSETS:
+ case TCGETA:
+ case TCSETAF:
+ case TCSETAW:
+ case TCSETA:
+ case TCXONC:
+ case TCFLSH:
+ case TIOCOUTQ:
+ case TIOCINQ:
+ case TIOCGLCKTRMIOS:
+ case TIOCSLCKTRMIOS:
+ case TIOCPKT:
+ case TIOCGSOFTCAR:
+ case TIOCSSOFTCAR:
+ return -ENOIOCTLCMD;
+#if 0
+ case TCwhatever:
+ /* do something */
+ break;
+#endif
+ default:
+ for (i = 0; i < ARRAY_SIZE(tty_ioctls); i++)
+ if (cmd == tty_ioctls[i].cmd)
+ break;
+ if (i == ARRAY_SIZE(tty_ioctls)) {
+ printk(KERN_ERR "%s: %s: unknown ioctl: 0x%x\n",
+ __func__, tty->name, cmd);
+ }
+ ret = -ENOIOCTLCMD;
+ break;
+ }
+ return ret;
+}
+
+void line_throttle(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+
+ deactivate_chan(&line->chan_list, line->driver->read_irq);
+ line->throttled = 1;
+}
+
+void line_unthrottle(struct tty_struct *tty)
+{
+ struct line *line = tty->driver_data;
+
+ line->throttled = 0;
+ chan_interrupt(&line->chan_list, &line->task, tty,
+ line->driver->read_irq);
+
+ /*
+ * Maybe there is enough stuff pending that calling the interrupt
+ * throttles us again. In this case, line->throttled will be 1
+ * again and we shouldn't turn the interrupt back on.
+ */
+ if (!line->throttled)
+ reactivate_chan(&line->chan_list, line->driver->read_irq);
+}
+
+static irqreturn_t line_write_interrupt(int irq, void *data)
+{
+ struct chan *chan = data;
+ struct line *line = chan->line;
+ struct tty_struct *tty = line->tty;
+ int err;
+
+ /*
+ * Interrupts are disabled here because we registered the interrupt with
+ * IRQF_DISABLED (see line_setup_irq).
+ */
+
+ spin_lock(&line->lock);
+ err = flush_buffer(line);
+ if (err == 0) {
+ return IRQ_NONE;
+ } else if (err < 0) {
+ line->head = line->buffer;
+ line->tail = line->buffer;
+ }
+ spin_unlock(&line->lock);
+
+ if (tty == NULL)
+ return IRQ_NONE;
+
+ tty_wakeup(tty);
+ return IRQ_HANDLED;
+}
+
+int line_setup_irq(int fd, int input, int output, struct line *line, void *data)
+{
+ const struct line_driver *driver = line->driver;
+ int err = 0, flags = IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM;
+
+ if (input)
+ err = um_request_irq(driver->read_irq, fd, IRQ_READ,
+ line_interrupt, flags,
+ driver->read_irq_name, data);
+ if (err)
+ return err;
+ if (output)
+ err = um_request_irq(driver->write_irq, fd, IRQ_WRITE,
+ line_write_interrupt, flags,
+ driver->write_irq_name, data);
+ line->have_irq = 1;
+ return err;
+}
+
+/*
+ * Normally, a driver like this can rely mostly on the tty layer
+ * locking, particularly when it comes to the driver structure.
+ * However, in this case, mconsole requests can come in "from the
+ * side", and race with opens and closes.
+ *
+ * mconsole config requests will want to be sure the device isn't in
+ * use, and get_config, open, and close will want a stable
+ * configuration. The checking and modification of the configuration
+ * is done under a spinlock. Checking whether the device is in use is
+ * line->tty->count > 1, also under the spinlock.
+ *
+ * line->count serves to decide whether the device should be enabled or
+ * disabled on the host. If it's equal to 0, then we are doing the
+ * first open or last close. Otherwise, open and close just return.
+ */
+
+int line_open(struct line *lines, struct tty_struct *tty)
+{
+ struct line *line = &lines[tty->index];
+ int err = -ENODEV;
+
+ spin_lock(&line->count_lock);
+ if (!line->valid)
+ goto out_unlock;
+
+ err = 0;
+ if (line->count++)
+ goto out_unlock;
+
+ BUG_ON(tty->driver_data);
+ tty->driver_data = line;
+ line->tty = tty;
+
+ spin_unlock(&line->count_lock);
+ err = enable_chan(line);
+ if (err) /* line_close() will be called by our caller */
+ return err;
+
+ INIT_DELAYED_WORK(&line->task, line_timer_cb);
+
+ if (!line->sigio) {
+ chan_enable_winch(&line->chan_list, tty);
+ line->sigio = 1;
+ }
+
+ chan_window_size(&line->chan_list, &tty->winsize.ws_row,
+ &tty->winsize.ws_col);
+
+ return 0;
+
+out_unlock:
+ spin_unlock(&line->count_lock);
+ return err;
+}
+
+static void unregister_winch(struct tty_struct *tty);
+
+void line_close(struct tty_struct *tty, struct file * filp)
+{
+ struct line *line = tty->driver_data;
+
+ /*
+ * If line_open fails (and tty->driver_data is never set),
+ * tty_open will call line_close. So just return in this case.
+ */
+ if (line == NULL)
+ return;
+
+ /* We ignore the error anyway! */
+ flush_buffer(line);
+
+ spin_lock(&line->count_lock);
+ BUG_ON(!line->valid);
+
+ if (--line->count)
+ goto out_unlock;
+
+ line->tty = NULL;
+ tty->driver_data = NULL;
+
+ spin_unlock(&line->count_lock);
+
+ if (line->sigio) {
+ unregister_winch(tty);
+ line->sigio = 0;
+ }
+
+ return;
+
+out_unlock:
+ spin_unlock(&line->count_lock);
+}
+
+void close_lines(struct line *lines, int nlines)
+{
+ int i;
+
+ for(i = 0; i < nlines; i++)
+ close_chan(&lines[i].chan_list, 0);
+}
+
+static int setup_one_line(struct line *lines, int n, char *init, int init_prio,
+ char **error_out)
+{
+ struct line *line = &lines[n];
+ int err = -EINVAL;
+
+ spin_lock(&line->count_lock);
+
+ if (line->count) {
+ *error_out = "Device is already open";
+ goto out;
+ }
+
+ if (line->init_pri <= init_prio) {
+ line->init_pri = init_prio;
+ if (!strcmp(init, "none"))
+ line->valid = 0;
+ else {
+ line->init_str = init;
+ line->valid = 1;
+ }
+ }
+ err = 0;
+out:
+ spin_unlock(&line->count_lock);
+ return err;
+}
+
+/*
+ * Common setup code for both startup command line and mconsole initialization.
+ * @lines contains the array (of size @num) to modify;
+ * @init is the setup string;
+ * @error_out is an error string in the case of failure;
+ */
+
+int line_setup(struct line *lines, unsigned int num, char *init,
+ char **error_out)
+{
+ int i, n, err;
+ char *end;
+
+ if (*init == '=') {
+ /*
+ * We said con=/ssl= instead of con#=, so we are configuring all
+ * consoles at once.
+ */
+ n = -1;
+ }
+ else {
+ n = simple_strtoul(init, &end, 0);
+ if (*end != '=') {
+ *error_out = "Couldn't parse device number";
+ return -EINVAL;
+ }
+ init = end;
+ }
+ init++;
+
+ if (n >= (signed int) num) {
+ *error_out = "Device number out of range";
+ return -EINVAL;
+ }
+ else if (n >= 0) {
+ err = setup_one_line(lines, n, init, INIT_ONE, error_out);
+ if (err)
+ return err;
+ }
+ else {
+ for(i = 0; i < num; i++) {
+ err = setup_one_line(lines, i, init, INIT_ALL,
+ error_out);
+ if (err)
+ return err;
+ }
+ }
+ return n == -1 ? num : n;
+}
+
+int line_config(struct line *lines, unsigned int num, char *str,
+ const struct chan_opts *opts, char **error_out)
+{
+ struct line *line;
+ char *new;
+ int n;
+
+ if (*str == '=') {
+ *error_out = "Can't configure all devices from mconsole";
+ return -EINVAL;
+ }
+
+ new = kstrdup(str, GFP_KERNEL);
+ if (new == NULL) {
+ *error_out = "Failed to allocate memory";
+ return -ENOMEM;
+ }
+ n = line_setup(lines, num, new, error_out);
+ if (n < 0)
+ return n;
+
+ line = &lines[n];
+ return parse_chan_pair(line->init_str, line, n, opts, error_out);
+}
+
+int line_get_config(char *name, struct line *lines, unsigned int num, char *str,
+ int size, char **error_out)
+{
+ struct line *line;
+ char *end;
+ int dev, n = 0;
+
+ dev = simple_strtoul(name, &end, 0);
+ if ((*end != '\0') || (end == name)) {
+ *error_out = "line_get_config failed to parse device number";
+ return 0;
+ }
+
+ if ((dev < 0) || (dev >= num)) {
+ *error_out = "device number out of range";
+ return 0;
+ }
+
+ line = &lines[dev];
+
+ spin_lock(&line->count_lock);
+ if (!line->valid)
+ CONFIG_CHUNK(str, size, n, "none", 1);
+ else if (line->tty == NULL)
+ CONFIG_CHUNK(str, size, n, line->init_str, 1);
+ else n = chan_config_string(&line->chan_list, str, size, error_out);
+ spin_unlock(&line->count_lock);
+
+ return n;
+}
+
+int line_id(char **str, int *start_out, int *end_out)
+{
+ char *end;
+ int n;
+
+ n = simple_strtoul(*str, &end, 0);
+ if ((*end != '\0') || (end == *str))
+ return -1;
+
+ *str = end;
+ *start_out = n;
+ *end_out = n;
+ return n;
+}
+
+int line_remove(struct line *lines, unsigned int num, int n, char **error_out)
+{
+ int err;
+ char config[sizeof("conxxxx=none\0")];
+
+ sprintf(config, "%d=none", n);
+ err = line_setup(lines, num, config, error_out);
+ if (err >= 0)
+ err = 0;
+ return err;
+}
+
+struct tty_driver *register_lines(struct line_driver *line_driver,
+ const struct tty_operations *ops,
+ struct line *lines, int nlines)
+{
+ int i;
+ struct tty_driver *driver = alloc_tty_driver(nlines);
+
+ if (!driver)
+ return NULL;
+
+ driver->driver_name = line_driver->name;
+ driver->name = line_driver->device_name;
+ driver->major = line_driver->major;
+ driver->minor_start = line_driver->minor_start;
+ driver->type = line_driver->type;
+ driver->subtype = line_driver->subtype;
+ driver->flags = TTY_DRIVER_REAL_RAW;
+ driver->init_termios = tty_std_termios;
+ tty_set_operations(driver, ops);
+
+ if (tty_register_driver(driver)) {
+ printk(KERN_ERR "register_lines : can't register %s driver\n",
+ line_driver->name);
+ put_tty_driver(driver);
+ return NULL;
+ }
+
+ for(i = 0; i < nlines; i++) {
+ if (!lines[i].valid)
+ tty_unregister_device(driver, i);
+ }
+
+ mconsole_register_dev(&line_driver->mc);
+ return driver;
+}
+
+static DEFINE_SPINLOCK(winch_handler_lock);
+static LIST_HEAD(winch_handlers);
+
+void lines_init(struct line *lines, int nlines, struct chan_opts *opts)
+{
+ struct line *line;
+ char *error;
+ int i;
+
+ for(i = 0; i < nlines; i++) {
+ line = &lines[i];
+ INIT_LIST_HEAD(&line->chan_list);
+
+ if (line->init_str == NULL)
+ continue;
+
+ line->init_str = kstrdup(line->init_str, GFP_KERNEL);
+ if (line->init_str == NULL)
+ printk(KERN_ERR "lines_init - kstrdup returned NULL\n");
+
+ if (parse_chan_pair(line->init_str, line, i, opts, &error)) {
+ printk(KERN_ERR "parse_chan_pair failed for "
+ "device %d : %s\n", i, error);
+ line->valid = 0;
+ }
+ }
+}
+
+struct winch {
+ struct list_head list;
+ int fd;
+ int tty_fd;
+ int pid;
+ struct tty_struct *tty;
+ unsigned long stack;
+ struct work_struct work;
+};
+
+static void __free_winch(struct work_struct *work)
+{
+ struct winch *winch = container_of(work, struct winch, work);
+ free_irq(WINCH_IRQ, winch);
+
+ if (winch->pid != -1)
+ os_kill_process(winch->pid, 1);
+ if (winch->stack != 0)
+ free_stack(winch->stack, 0);
+ kfree(winch);
+}
+
+static void free_winch(struct winch *winch)
+{
+ int fd = winch->fd;
+ winch->fd = -1;
+ if (fd != -1)
+ os_close_file(fd);
+ list_del(&winch->list);
+ __free_winch(&winch->work);
+}
+
+static irqreturn_t winch_interrupt(int irq, void *data)
+{
+ struct winch *winch = data;
+ struct tty_struct *tty;
+ struct line *line;
+ int fd = winch->fd;
+ int err;
+ char c;
+
+ if (fd != -1) {
+ err = generic_read(fd, &c, NULL);
+ if (err < 0) {
+ if (err != -EAGAIN) {
+ winch->fd = -1;
+ list_del(&winch->list);
+ os_close_file(fd);
+ printk(KERN_ERR "winch_interrupt : "
+ "read failed, errno = %d\n", -err);
+ printk(KERN_ERR "fd %d is losing SIGWINCH "
+ "support\n", winch->tty_fd);
+ INIT_WORK(&winch->work, __free_winch);
+ schedule_work(&winch->work);
+ return IRQ_HANDLED;
+ }
+ goto out;
+ }
+ }
+ tty = winch->tty;
+ if (tty != NULL) {
+ line = tty->driver_data;
+ if (line != NULL) {
+ chan_window_size(&line->chan_list, &tty->winsize.ws_row,
+ &tty->winsize.ws_col);
+ kill_pgrp(tty->pgrp, SIGWINCH, 1);
+ }
+ }
+ out:
+ if (winch->fd != -1)
+ reactivate_fd(winch->fd, WINCH_IRQ);
+ return IRQ_HANDLED;
+}
+
+void register_winch_irq(int fd, int tty_fd, int pid, struct tty_struct *tty,
+ unsigned long stack)
+{
+ struct winch *winch;
+
+ winch = kmalloc(sizeof(*winch), GFP_KERNEL);
+ if (winch == NULL) {
+ printk(KERN_ERR "register_winch_irq - kmalloc failed\n");
+ goto cleanup;
+ }
+
+ *winch = ((struct winch) { .list = LIST_HEAD_INIT(winch->list),
+ .fd = fd,
+ .tty_fd = tty_fd,
+ .pid = pid,
+ .tty = tty,
+ .stack = stack });
+
+ if (um_request_irq(WINCH_IRQ, fd, IRQ_READ, winch_interrupt,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
+ "winch", winch) < 0) {
+ printk(KERN_ERR "register_winch_irq - failed to register "
+ "IRQ\n");
+ goto out_free;
+ }
+
+ spin_lock(&winch_handler_lock);
+ list_add(&winch->list, &winch_handlers);
+ spin_unlock(&winch_handler_lock);
+
+ return;
+
+ out_free:
+ kfree(winch);
+ cleanup:
+ os_kill_process(pid, 1);
+ os_close_file(fd);
+ if (stack != 0)
+ free_stack(stack, 0);
+}
+
+static void unregister_winch(struct tty_struct *tty)
+{
+ struct list_head *ele, *next;
+ struct winch *winch;
+
+ spin_lock(&winch_handler_lock);
+
+ list_for_each_safe(ele, next, &winch_handlers) {
+ winch = list_entry(ele, struct winch, list);
+ if (winch->tty == tty) {
+ free_winch(winch);
+ break;
+ }
+ }
+ spin_unlock(&winch_handler_lock);
+}
+
+static void winch_cleanup(void)
+{
+ struct list_head *ele, *next;
+ struct winch *winch;
+
+ spin_lock(&winch_handler_lock);
+
+ list_for_each_safe(ele, next, &winch_handlers) {
+ winch = list_entry(ele, struct winch, list);
+ free_winch(winch);
+ }
+
+ spin_unlock(&winch_handler_lock);
+}
+__uml_exitcall(winch_cleanup);
+
+char *add_xterm_umid(char *base)
+{
+ char *umid, *title;
+ int len;
+
+ umid = get_umid();
+ if (*umid == '\0')
+ return base;
+
+ len = strlen(base) + strlen(" ()") + strlen(umid) + 1;
+ title = kmalloc(len, GFP_KERNEL);
+ if (title == NULL) {
+ printk(KERN_ERR "Failed to allocate buffer for xterm title\n");
+ return base;
+ }
+
+ snprintf(title, len, "%s (%s)", base, umid);
+ return title;
+}
diff --git a/arch/um/drivers/line.h b/arch/um/drivers/line.h
new file mode 100644
index 00000000000..63df3ca02ac
--- /dev/null
+++ b/arch/um/drivers/line.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __LINE_H__
+#define __LINE_H__
+
+#include "linux/list.h"
+#include "linux/workqueue.h"
+#include "linux/tty.h"
+#include "linux/interrupt.h"
+#include "linux/spinlock.h"
+#include "linux/mutex.h"
+#include "chan_user.h"
+#include "mconsole_kern.h"
+
+/* There's only one modifiable field in this - .mc.list */
+struct line_driver {
+ const char *name;
+ const char *device_name;
+ const short major;
+ const short minor_start;
+ const short type;
+ const short subtype;
+ const int read_irq;
+ const char *read_irq_name;
+ const int write_irq;
+ const char *write_irq_name;
+ struct mc_device mc;
+};
+
+struct line {
+ struct tty_struct *tty;
+ spinlock_t count_lock;
+ unsigned long count;
+ int valid;
+
+ char *init_str;
+ int init_pri;
+ struct list_head chan_list;
+
+ /*This lock is actually, mostly, local to*/
+ spinlock_t lock;
+ int throttled;
+ /* Yes, this is a real circular buffer.
+ * XXX: And this should become a struct kfifo!
+ *
+ * buffer points to a buffer allocated on demand, of length
+ * LINE_BUFSIZE, head to the start of the ring, tail to the end.*/
+ char *buffer;
+ char *head;
+ char *tail;
+
+ int sigio;
+ struct delayed_work task;
+ const struct line_driver *driver;
+ int have_irq;
+};
+
+#define LINE_INIT(str, d) \
+ { .count_lock = __SPIN_LOCK_UNLOCKED((str).count_lock), \
+ .init_str = str, \
+ .init_pri = INIT_STATIC, \
+ .valid = 1, \
+ .lock = __SPIN_LOCK_UNLOCKED((str).lock), \
+ .driver = d }
+
+extern void line_close(struct tty_struct *tty, struct file * filp);
+extern int line_open(struct line *lines, struct tty_struct *tty);
+extern int line_setup(struct line *lines, unsigned int sizeof_lines,
+ char *init, char **error_out);
+extern int line_write(struct tty_struct *tty, const unsigned char *buf,
+ int len);
+extern int line_put_char(struct tty_struct *tty, unsigned char ch);
+extern void line_set_termios(struct tty_struct *tty, struct ktermios * old);
+extern int line_chars_in_buffer(struct tty_struct *tty);
+extern void line_flush_buffer(struct tty_struct *tty);
+extern void line_flush_chars(struct tty_struct *tty);
+extern int line_write_room(struct tty_struct *tty);
+extern int line_ioctl(struct tty_struct *tty, unsigned int cmd,
+ unsigned long arg);
+extern void line_throttle(struct tty_struct *tty);
+extern void line_unthrottle(struct tty_struct *tty);
+
+extern char *add_xterm_umid(char *base);
+extern int line_setup_irq(int fd, int input, int output, struct line *line,
+ void *data);
+extern void line_close_chan(struct line *line);
+extern struct tty_driver *register_lines(struct line_driver *line_driver,
+ const struct tty_operations *driver,
+ struct line *lines, int nlines);
+extern void lines_init(struct line *lines, int nlines, struct chan_opts *opts);
+extern void close_lines(struct line *lines, int nlines);
+
+extern int line_config(struct line *lines, unsigned int sizeof_lines,
+ char *str, const struct chan_opts *opts,
+ char **error_out);
+extern int line_id(char **str, int *start_out, int *end_out);
+extern int line_remove(struct line *lines, unsigned int sizeof_lines, int n,
+ char **error_out);
+extern int line_get_config(char *dev, struct line *lines,
+ unsigned int sizeof_lines, char *str,
+ int size, char **error_out);
+
+#endif
diff --git a/arch/um/drivers/mconsole.h b/arch/um/drivers/mconsole.h
new file mode 100644
index 00000000000..c139ae1d682
--- /dev/null
+++ b/arch/um/drivers/mconsole.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MCONSOLE_H__
+#define __MCONSOLE_H__
+
+#ifndef __KERNEL__
+#include <stdint.h>
+#define u32 uint32_t
+#endif
+
+#include "sysdep/ptrace.h"
+
+#define MCONSOLE_MAGIC (0xcafebabe)
+#define MCONSOLE_MAX_DATA (512)
+#define MCONSOLE_VERSION 2
+
+struct mconsole_request {
+ u32 magic;
+ u32 version;
+ u32 len;
+ char data[MCONSOLE_MAX_DATA];
+};
+
+struct mconsole_reply {
+ u32 err;
+ u32 more;
+ u32 len;
+ char data[MCONSOLE_MAX_DATA];
+};
+
+struct mconsole_notify {
+ u32 magic;
+ u32 version;
+ enum { MCONSOLE_SOCKET, MCONSOLE_PANIC, MCONSOLE_HANG,
+ MCONSOLE_USER_NOTIFY } type;
+ u32 len;
+ char data[MCONSOLE_MAX_DATA];
+};
+
+struct mc_request;
+
+enum mc_context { MCONSOLE_INTR, MCONSOLE_PROC };
+
+struct mconsole_command
+{
+ char *command;
+ void (*handler)(struct mc_request *req);
+ enum mc_context context;
+};
+
+struct mc_request
+{
+ int len;
+ int as_interrupt;
+
+ int originating_fd;
+ unsigned int originlen;
+ unsigned char origin[128]; /* sockaddr_un */
+
+ struct mconsole_request request;
+ struct mconsole_command *cmd;
+ struct uml_pt_regs regs;
+};
+
+extern char mconsole_socket_name[];
+
+extern int mconsole_unlink_socket(void);
+extern int mconsole_reply_len(struct mc_request *req, const char *reply,
+ int len, int err, int more);
+extern int mconsole_reply(struct mc_request *req, const char *str, int err,
+ int more);
+
+extern void mconsole_version(struct mc_request *req);
+extern void mconsole_help(struct mc_request *req);
+extern void mconsole_halt(struct mc_request *req);
+extern void mconsole_reboot(struct mc_request *req);
+extern void mconsole_config(struct mc_request *req);
+extern void mconsole_remove(struct mc_request *req);
+extern void mconsole_sysrq(struct mc_request *req);
+extern void mconsole_cad(struct mc_request *req);
+extern void mconsole_stop(struct mc_request *req);
+extern void mconsole_go(struct mc_request *req);
+extern void mconsole_log(struct mc_request *req);
+extern void mconsole_proc(struct mc_request *req);
+extern void mconsole_stack(struct mc_request *req);
+
+extern int mconsole_get_request(int fd, struct mc_request *req);
+extern int mconsole_notify(char *sock_name, int type, const void *data,
+ int len);
+extern char *mconsole_notify_socket(void);
+extern void lock_notify(void);
+extern void unlock_notify(void);
+
+#endif
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
new file mode 100644
index 00000000000..c70e047eed7
--- /dev/null
+++ b/arch/um/drivers/mconsole_kern.c
@@ -0,0 +1,917 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
+ * Copyright (C) 2001 - 2008 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/console.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/interrupt.h>
+#include <linux/list.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/proc_fs.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+#include <linux/utsname.h>
+#include <linux/socket.h>
+#include <linux/un.h>
+#include <linux/workqueue.h>
+#include <linux/mutex.h>
+#include <asm/uaccess.h>
+
+#include "init.h"
+#include "irq_kern.h"
+#include "irq_user.h"
+#include "kern_util.h"
+#include "mconsole.h"
+#include "mconsole_kern.h"
+#include "os.h"
+
+static int do_unlink_socket(struct notifier_block *notifier,
+ unsigned long what, void *data)
+{
+ return mconsole_unlink_socket();
+}
+
+
+static struct notifier_block reboot_notifier = {
+ .notifier_call = do_unlink_socket,
+ .priority = 0,
+};
+
+/* Safe without explicit locking for now. Tasklets provide their own
+ * locking, and the interrupt handler is safe because it can't interrupt
+ * itself and it can only happen on CPU 0.
+ */
+
+static LIST_HEAD(mc_requests);
+
+static void mc_work_proc(struct work_struct *unused)
+{
+ struct mconsole_entry *req;
+ unsigned long flags;
+
+ while (!list_empty(&mc_requests)) {
+ local_irq_save(flags);
+ req = list_entry(mc_requests.next, struct mconsole_entry, list);
+ list_del(&req->list);
+ local_irq_restore(flags);
+ req->request.cmd->handler(&req->request);
+ kfree(req);
+ }
+}
+
+static DECLARE_WORK(mconsole_work, mc_work_proc);
+
+static irqreturn_t mconsole_interrupt(int irq, void *dev_id)
+{
+ /* long to avoid size mismatch warnings from gcc */
+ long fd;
+ struct mconsole_entry *new;
+ static struct mc_request req; /* that's OK */
+
+ fd = (long) dev_id;
+ while (mconsole_get_request(fd, &req)) {
+ if (req.cmd->context == MCONSOLE_INTR)
+ (*req.cmd->handler)(&req);
+ else {
+ new = kmalloc(sizeof(*new), GFP_NOWAIT);
+ if (new == NULL)
+ mconsole_reply(&req, "Out of memory", 1, 0);
+ else {
+ new->request = req;
+ new->request.regs = get_irq_regs()->regs;
+ list_add(&new->list, &mc_requests);
+ }
+ }
+ }
+ if (!list_empty(&mc_requests))
+ schedule_work(&mconsole_work);
+ reactivate_fd(fd, MCONSOLE_IRQ);
+ return IRQ_HANDLED;
+}
+
+void mconsole_version(struct mc_request *req)
+{
+ char version[256];
+
+ sprintf(version, "%s %s %s %s %s", utsname()->sysname,
+ utsname()->nodename, utsname()->release, utsname()->version,
+ utsname()->machine);
+ mconsole_reply(req, version, 0, 0);
+}
+
+void mconsole_log(struct mc_request *req)
+{
+ int len;
+ char *ptr = req->request.data;
+
+ ptr += strlen("log ");
+
+ len = req->len - (ptr - req->request.data);
+ printk(KERN_WARNING "%.*s", len, ptr);
+ mconsole_reply(req, "", 0, 0);
+}
+
+/* This is a more convoluted version of mconsole_proc, which has some stability
+ * problems; however, we need it fixed, because it is expected that UML users
+ * mount HPPFS instead of procfs on /proc. And we want mconsole_proc to still
+ * show the real procfs content, not the ones from hppfs.*/
+#if 0
+void mconsole_proc(struct mc_request *req)
+{
+ struct vfsmount *mnt = current->nsproxy->pid_ns->proc_mnt;
+ struct file *file;
+ int n;
+ char *ptr = req->request.data, *buf;
+ mm_segment_t old_fs = get_fs();
+
+ ptr += strlen("proc");
+ ptr = skip_spaces(ptr);
+
+ file = file_open_root(mnt->mnt_root, mnt, ptr, O_RDONLY);
+ if (IS_ERR(file)) {
+ mconsole_reply(req, "Failed to open file", 1, 0);
+ goto out;
+ }
+
+ buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (buf == NULL) {
+ mconsole_reply(req, "Failed to allocate buffer", 1, 0);
+ goto out_fput;
+ }
+
+ if (file->f_op->read) {
+ do {
+ loff_t pos;
+ set_fs(KERNEL_DS);
+ n = vfs_read(file, buf, PAGE_SIZE - 1, &pos);
+ file_pos_write(file, pos);
+ set_fs(old_fs);
+ if (n >= 0) {
+ buf[n] = '\0';
+ mconsole_reply(req, buf, 0, (n > 0));
+ }
+ else {
+ mconsole_reply(req, "Read of file failed",
+ 1, 0);
+ goto out_free;
+ }
+ } while (n > 0);
+ }
+ else mconsole_reply(req, "", 0, 0);
+
+ out_free:
+ kfree(buf);
+ out_fput:
+ fput(file);
+ out: ;
+}
+#endif
+
+void mconsole_proc(struct mc_request *req)
+{
+ char path[64];
+ char *buf;
+ int len;
+ int fd;
+ int first_chunk = 1;
+ char *ptr = req->request.data;
+
+ ptr += strlen("proc");
+ ptr = skip_spaces(ptr);
+ snprintf(path, sizeof(path), "/proc/%s", ptr);
+
+ fd = sys_open(path, 0, 0);
+ if (fd < 0) {
+ mconsole_reply(req, "Failed to open file", 1, 0);
+ printk(KERN_ERR "open %s: %d\n",path,fd);
+ goto out;
+ }
+
+ buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (buf == NULL) {
+ mconsole_reply(req, "Failed to allocate buffer", 1, 0);
+ goto out_close;
+ }
+
+ for (;;) {
+ len = sys_read(fd, buf, PAGE_SIZE-1);
+ if (len < 0) {
+ mconsole_reply(req, "Read of file failed", 1, 0);
+ goto out_free;
+ }
+ /* Begin the file content on his own line. */
+ if (first_chunk) {
+ mconsole_reply(req, "\n", 0, 1);
+ first_chunk = 0;
+ }
+ if (len == PAGE_SIZE-1) {
+ buf[len] = '\0';
+ mconsole_reply(req, buf, 0, 1);
+ } else {
+ buf[len] = '\0';
+ mconsole_reply(req, buf, 0, 0);
+ break;
+ }
+ }
+
+ out_free:
+ kfree(buf);
+ out_close:
+ sys_close(fd);
+ out:
+ /* nothing */;
+}
+
+#define UML_MCONSOLE_HELPTEXT \
+"Commands: \n\
+ version - Get kernel version \n\
+ help - Print this message \n\
+ halt - Halt UML \n\
+ reboot - Reboot UML \n\
+ config <dev>=<config> - Add a new device to UML; \n\
+ same syntax as command line \n\
+ config <dev> - Query the configuration of a device \n\
+ remove <dev> - Remove a device from UML \n\
+ sysrq <letter> - Performs the SysRq action controlled by the letter \n\
+ cad - invoke the Ctrl-Alt-Del handler \n\
+ stop - pause the UML; it will do nothing until it receives a 'go' \n\
+ go - continue the UML after a 'stop' \n\
+ log <string> - make UML enter <string> into the kernel log\n\
+ proc <file> - returns the contents of the UML's /proc/<file>\n\
+ stack <pid> - returns the stack of the specified pid\n\
+"
+
+void mconsole_help(struct mc_request *req)
+{
+ mconsole_reply(req, UML_MCONSOLE_HELPTEXT, 0, 0);
+}
+
+void mconsole_halt(struct mc_request *req)
+{
+ mconsole_reply(req, "", 0, 0);
+ machine_halt();
+}
+
+void mconsole_reboot(struct mc_request *req)
+{
+ mconsole_reply(req, "", 0, 0);
+ machine_restart(NULL);
+}
+
+void mconsole_cad(struct mc_request *req)
+{
+ mconsole_reply(req, "", 0, 0);
+ ctrl_alt_del();
+}
+
+void mconsole_go(struct mc_request *req)
+{
+ mconsole_reply(req, "Not stopped", 1, 0);
+}
+
+void mconsole_stop(struct mc_request *req)
+{
+ deactivate_fd(req->originating_fd, MCONSOLE_IRQ);
+ os_set_fd_block(req->originating_fd, 1);
+ mconsole_reply(req, "stopped", 0, 0);
+ for (;;) {
+ if (!mconsole_get_request(req->originating_fd, req))
+ continue;
+ if (req->cmd->handler == mconsole_go)
+ break;
+ if (req->cmd->handler == mconsole_stop) {
+ mconsole_reply(req, "Already stopped", 1, 0);
+ continue;
+ }
+ if (req->cmd->handler == mconsole_sysrq) {
+ struct pt_regs *old_regs;
+ old_regs = set_irq_regs((struct pt_regs *)&req->regs);
+ mconsole_sysrq(req);
+ set_irq_regs(old_regs);
+ continue;
+ }
+ (*req->cmd->handler)(req);
+ }
+ os_set_fd_block(req->originating_fd, 0);
+ reactivate_fd(req->originating_fd, MCONSOLE_IRQ);
+ mconsole_reply(req, "", 0, 0);
+}
+
+static DEFINE_SPINLOCK(mc_devices_lock);
+static LIST_HEAD(mconsole_devices);
+
+void mconsole_register_dev(struct mc_device *new)
+{
+ spin_lock(&mc_devices_lock);
+ BUG_ON(!list_empty(&new->list));
+ list_add(&new->list, &mconsole_devices);
+ spin_unlock(&mc_devices_lock);
+}
+
+static struct mc_device *mconsole_find_dev(char *name)
+{
+ struct list_head *ele;
+ struct mc_device *dev;
+
+ list_for_each(ele, &mconsole_devices) {
+ dev = list_entry(ele, struct mc_device, list);
+ if (!strncmp(name, dev->name, strlen(dev->name)))
+ return dev;
+ }
+ return NULL;
+}
+
+#define UNPLUGGED_PER_PAGE \
+ ((PAGE_SIZE - sizeof(struct list_head)) / sizeof(unsigned long))
+
+struct unplugged_pages {
+ struct list_head list;
+ void *pages[UNPLUGGED_PER_PAGE];
+};
+
+static DEFINE_MUTEX(plug_mem_mutex);
+static unsigned long long unplugged_pages_count = 0;
+static LIST_HEAD(unplugged_pages);
+static int unplug_index = UNPLUGGED_PER_PAGE;
+
+static int mem_config(char *str, char **error_out)
+{
+ unsigned long long diff;
+ int err = -EINVAL, i, add;
+ char *ret;
+
+ if (str[0] != '=') {
+ *error_out = "Expected '=' after 'mem'";
+ goto out;
+ }
+
+ str++;
+ if (str[0] == '-')
+ add = 0;
+ else if (str[0] == '+') {
+ add = 1;
+ }
+ else {
+ *error_out = "Expected increment to start with '-' or '+'";
+ goto out;
+ }
+
+ str++;
+ diff = memparse(str, &ret);
+ if (*ret != '\0') {
+ *error_out = "Failed to parse memory increment";
+ goto out;
+ }
+
+ diff /= PAGE_SIZE;
+
+ mutex_lock(&plug_mem_mutex);
+ for (i = 0; i < diff; i++) {
+ struct unplugged_pages *unplugged;
+ void *addr;
+
+ if (add) {
+ if (list_empty(&unplugged_pages))
+ break;
+
+ unplugged = list_entry(unplugged_pages.next,
+ struct unplugged_pages, list);
+ if (unplug_index > 0)
+ addr = unplugged->pages[--unplug_index];
+ else {
+ list_del(&unplugged->list);
+ addr = unplugged;
+ unplug_index = UNPLUGGED_PER_PAGE;
+ }
+
+ free_page((unsigned long) addr);
+ unplugged_pages_count--;
+ }
+ else {
+ struct page *page;
+
+ page = alloc_page(GFP_ATOMIC);
+ if (page == NULL)
+ break;
+
+ unplugged = page_address(page);
+ if (unplug_index == UNPLUGGED_PER_PAGE) {
+ list_add(&unplugged->list, &unplugged_pages);
+ unplug_index = 0;
+ }
+ else {
+ struct list_head *entry = unplugged_pages.next;
+ addr = unplugged;
+
+ unplugged = list_entry(entry,
+ struct unplugged_pages,
+ list);
+ err = os_drop_memory(addr, PAGE_SIZE);
+ if (err) {
+ printk(KERN_ERR "Failed to release "
+ "memory - errno = %d\n", err);
+ *error_out = "Failed to release memory";
+ goto out_unlock;
+ }
+ unplugged->pages[unplug_index++] = addr;
+ }
+
+ unplugged_pages_count++;
+ }
+ }
+
+ err = 0;
+out_unlock:
+ mutex_unlock(&plug_mem_mutex);
+out:
+ return err;
+}
+
+static int mem_get_config(char *name, char *str, int size, char **error_out)
+{
+ char buf[sizeof("18446744073709551615")];
+ int len = 0;
+
+ sprintf(buf, "%ld", uml_physmem);
+ CONFIG_CHUNK(str, size, len, buf, 1);
+
+ return len;
+}
+
+static int mem_id(char **str, int *start_out, int *end_out)
+{
+ *start_out = 0;
+ *end_out = 0;
+
+ return 0;
+}
+
+static int mem_remove(int n, char **error_out)
+{
+ *error_out = "Memory doesn't support the remove operation";
+ return -EBUSY;
+}
+
+static struct mc_device mem_mc = {
+ .list = LIST_HEAD_INIT(mem_mc.list),
+ .name = "mem",
+ .config = mem_config,
+ .get_config = mem_get_config,
+ .id = mem_id,
+ .remove = mem_remove,
+};
+
+static int __init mem_mc_init(void)
+{
+ if (can_drop_memory())
+ mconsole_register_dev(&mem_mc);
+ else printk(KERN_ERR "Can't release memory to the host - memory "
+ "hotplug won't be supported\n");
+ return 0;
+}
+
+__initcall(mem_mc_init);
+
+#define CONFIG_BUF_SIZE 64
+
+static void mconsole_get_config(int (*get_config)(char *, char *, int,
+ char **),
+ struct mc_request *req, char *name)
+{
+ char default_buf[CONFIG_BUF_SIZE], *error, *buf;
+ int n, size;
+
+ if (get_config == NULL) {
+ mconsole_reply(req, "No get_config routine defined", 1, 0);
+ return;
+ }
+
+ error = NULL;
+ size = ARRAY_SIZE(default_buf);
+ buf = default_buf;
+
+ while (1) {
+ n = (*get_config)(name, buf, size, &error);
+ if (error != NULL) {
+ mconsole_reply(req, error, 1, 0);
+ goto out;
+ }
+
+ if (n <= size) {
+ mconsole_reply(req, buf, 0, 0);
+ goto out;
+ }
+
+ if (buf != default_buf)
+ kfree(buf);
+
+ size = n;
+ buf = kmalloc(size, GFP_KERNEL);
+ if (buf == NULL) {
+ mconsole_reply(req, "Failed to allocate buffer", 1, 0);
+ return;
+ }
+ }
+ out:
+ if (buf != default_buf)
+ kfree(buf);
+}
+
+void mconsole_config(struct mc_request *req)
+{
+ struct mc_device *dev;
+ char *ptr = req->request.data, *name, *error_string = "";
+ int err;
+
+ ptr += strlen("config");
+ ptr = skip_spaces(ptr);
+ dev = mconsole_find_dev(ptr);
+ if (dev == NULL) {
+ mconsole_reply(req, "Bad configuration option", 1, 0);
+ return;
+ }
+
+ name = &ptr[strlen(dev->name)];
+ ptr = name;
+ while ((*ptr != '=') && (*ptr != '\0'))
+ ptr++;
+
+ if (*ptr == '=') {
+ err = (*dev->config)(name, &error_string);
+ mconsole_reply(req, error_string, err, 0);
+ }
+ else mconsole_get_config(dev->get_config, req, name);
+}
+
+void mconsole_remove(struct mc_request *req)
+{
+ struct mc_device *dev;
+ char *ptr = req->request.data, *err_msg = "";
+ char error[256];
+ int err, start, end, n;
+
+ ptr += strlen("remove");
+ ptr = skip_spaces(ptr);
+ dev = mconsole_find_dev(ptr);
+ if (dev == NULL) {
+ mconsole_reply(req, "Bad remove option", 1, 0);
+ return;
+ }
+
+ ptr = &ptr[strlen(dev->name)];
+
+ err = 1;
+ n = (*dev->id)(&ptr, &start, &end);
+ if (n < 0) {
+ err_msg = "Couldn't parse device number";
+ goto out;
+ }
+ else if ((n < start) || (n > end)) {
+ sprintf(error, "Invalid device number - must be between "
+ "%d and %d", start, end);
+ err_msg = error;
+ goto out;
+ }
+
+ err_msg = NULL;
+ err = (*dev->remove)(n, &err_msg);
+ switch(err) {
+ case 0:
+ err_msg = "";
+ break;
+ case -ENODEV:
+ if (err_msg == NULL)
+ err_msg = "Device doesn't exist";
+ break;
+ case -EBUSY:
+ if (err_msg == NULL)
+ err_msg = "Device is currently open";
+ break;
+ default:
+ break;
+ }
+out:
+ mconsole_reply(req, err_msg, err, 0);
+}
+
+struct mconsole_output {
+ struct list_head list;
+ struct mc_request *req;
+};
+
+static DEFINE_SPINLOCK(client_lock);
+static LIST_HEAD(clients);
+static char console_buf[MCONSOLE_MAX_DATA];
+
+static void console_write(struct console *console, const char *string,
+ unsigned int len)
+{
+ struct list_head *ele;
+ int n;
+
+ if (list_empty(&clients))
+ return;
+
+ while (len > 0) {
+ n = min((size_t) len, ARRAY_SIZE(console_buf));
+ strncpy(console_buf, string, n);
+ string += n;
+ len -= n;
+
+ list_for_each(ele, &clients) {
+ struct mconsole_output *entry;
+
+ entry = list_entry(ele, struct mconsole_output, list);
+ mconsole_reply_len(entry->req, console_buf, n, 0, 1);
+ }
+ }
+}
+
+static struct console mc_console = { .name = "mc",
+ .write = console_write,
+ .flags = CON_ENABLED,
+ .index = -1 };
+
+static int mc_add_console(void)
+{
+ register_console(&mc_console);
+ return 0;
+}
+
+late_initcall(mc_add_console);
+
+static void with_console(struct mc_request *req, void (*proc)(void *),
+ void *arg)
+{
+ struct mconsole_output entry;
+ unsigned long flags;
+
+ entry.req = req;
+ spin_lock_irqsave(&client_lock, flags);
+ list_add(&entry.list, &clients);
+ spin_unlock_irqrestore(&client_lock, flags);
+
+ (*proc)(arg);
+
+ mconsole_reply_len(req, "", 0, 0, 0);
+
+ spin_lock_irqsave(&client_lock, flags);
+ list_del(&entry.list);
+ spin_unlock_irqrestore(&client_lock, flags);
+}
+
+#ifdef CONFIG_MAGIC_SYSRQ
+
+#include <linux/sysrq.h>
+
+static void sysrq_proc(void *arg)
+{
+ char *op = arg;
+ handle_sysrq(*op);
+}
+
+void mconsole_sysrq(struct mc_request *req)
+{
+ char *ptr = req->request.data;
+
+ ptr += strlen("sysrq");
+ ptr = skip_spaces(ptr);
+
+ /*
+ * With 'b', the system will shut down without a chance to reply,
+ * so in this case, we reply first.
+ */
+ if (*ptr == 'b')
+ mconsole_reply(req, "", 0, 0);
+
+ with_console(req, sysrq_proc, ptr);
+}
+#else
+void mconsole_sysrq(struct mc_request *req)
+{
+ mconsole_reply(req, "Sysrq not compiled in", 1, 0);
+}
+#endif
+
+static void stack_proc(void *arg)
+{
+ struct task_struct *from = current, *to = arg;
+
+ to->thread.saved_task = from;
+ switch_to(from, to, from);
+}
+
+/*
+ * Mconsole stack trace
+ * Added by Allan Graves, Jeff Dike
+ * Dumps a stacks registers to the linux console.
+ * Usage stack <pid>.
+ */
+void mconsole_stack(struct mc_request *req)
+{
+ char *ptr = req->request.data;
+ int pid_requested= -1;
+ struct task_struct *to = NULL;
+
+ /*
+ * Would be nice:
+ * 1) Send showregs output to mconsole.
+ * 2) Add a way to stack dump all pids.
+ */
+
+ ptr += strlen("stack");
+ ptr = skip_spaces(ptr);
+
+ /*
+ * Should really check for multiple pids or reject bad args here
+ */
+ /* What do the arguments in mconsole_reply mean? */
+ if (sscanf(ptr, "%d", &pid_requested) == 0) {
+ mconsole_reply(req, "Please specify a pid", 1, 0);
+ return;
+ }
+
+ to = find_task_by_pid_ns(pid_requested, &init_pid_ns);
+ if ((to == NULL) || (pid_requested == 0)) {
+ mconsole_reply(req, "Couldn't find that pid", 1, 0);
+ return;
+ }
+ with_console(req, stack_proc, to);
+}
+
+/*
+ * Changed by mconsole_setup, which is __setup, and called before SMP is
+ * active.
+ */
+static char *notify_socket = NULL;
+
+static int __init mconsole_init(void)
+{
+ /* long to avoid size mismatch warnings from gcc */
+ long sock;
+ int err;
+ char file[UNIX_PATH_MAX];
+
+ if (umid_file_name("mconsole", file, sizeof(file)))
+ return -1;
+ snprintf(mconsole_socket_name, sizeof(file), "%s", file);
+
+ sock = os_create_unix_socket(file, sizeof(file), 1);
+ if (sock < 0) {
+ printk(KERN_ERR "Failed to initialize management console\n");
+ return 1;
+ }
+ if (os_set_fd_block(sock, 0))
+ goto out;
+
+ register_reboot_notifier(&reboot_notifier);
+
+ err = um_request_irq(MCONSOLE_IRQ, sock, IRQ_READ, mconsole_interrupt,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
+ "mconsole", (void *)sock);
+ if (err) {
+ printk(KERN_ERR "Failed to get IRQ for management console\n");
+ goto out;
+ }
+
+ if (notify_socket != NULL) {
+ notify_socket = kstrdup(notify_socket, GFP_KERNEL);
+ if (notify_socket != NULL)
+ mconsole_notify(notify_socket, MCONSOLE_SOCKET,
+ mconsole_socket_name,
+ strlen(mconsole_socket_name) + 1);
+ else printk(KERN_ERR "mconsole_setup failed to strdup "
+ "string\n");
+ }
+
+ printk(KERN_INFO "mconsole (version %d) initialized on %s\n",
+ MCONSOLE_VERSION, mconsole_socket_name);
+ return 0;
+
+ out:
+ os_close_file(sock);
+ return 1;
+}
+
+__initcall(mconsole_init);
+
+static ssize_t mconsole_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
+{
+ char *buf;
+
+ buf = kmalloc(count + 1, GFP_KERNEL);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ if (copy_from_user(buf, buffer, count)) {
+ count = -EFAULT;
+ goto out;
+ }
+
+ buf[count] = '\0';
+
+ mconsole_notify(notify_socket, MCONSOLE_USER_NOTIFY, buf, count);
+ out:
+ kfree(buf);
+ return count;
+}
+
+static const struct file_operations mconsole_proc_fops = {
+ .owner = THIS_MODULE,
+ .write = mconsole_proc_write,
+ .llseek = noop_llseek,
+};
+
+static int create_proc_mconsole(void)
+{
+ struct proc_dir_entry *ent;
+
+ if (notify_socket == NULL)
+ return 0;
+
+ ent = proc_create("mconsole", 0200, NULL, &mconsole_proc_fops);
+ if (ent == NULL) {
+ printk(KERN_INFO "create_proc_mconsole : create_proc_entry "
+ "failed\n");
+ return 0;
+ }
+ return 0;
+}
+
+static DEFINE_SPINLOCK(notify_spinlock);
+
+void lock_notify(void)
+{
+ spin_lock(&notify_spinlock);
+}
+
+void unlock_notify(void)
+{
+ spin_unlock(&notify_spinlock);
+}
+
+__initcall(create_proc_mconsole);
+
+#define NOTIFY "notify:"
+
+static int mconsole_setup(char *str)
+{
+ if (!strncmp(str, NOTIFY, strlen(NOTIFY))) {
+ str += strlen(NOTIFY);
+ notify_socket = str;
+ }
+ else printk(KERN_ERR "mconsole_setup : Unknown option - '%s'\n", str);
+ return 1;
+}
+
+__setup("mconsole=", mconsole_setup);
+
+__uml_help(mconsole_setup,
+"mconsole=notify:<socket>\n"
+" Requests that the mconsole driver send a message to the named Unix\n"
+" socket containing the name of the mconsole socket. This also serves\n"
+" to notify outside processes when UML has booted far enough to respond\n"
+" to mconsole requests.\n\n"
+);
+
+static int notify_panic(struct notifier_block *self, unsigned long unused1,
+ void *ptr)
+{
+ char *message = ptr;
+
+ if (notify_socket == NULL)
+ return 0;
+
+ mconsole_notify(notify_socket, MCONSOLE_PANIC, message,
+ strlen(message) + 1);
+ return 0;
+}
+
+static struct notifier_block panic_exit_notifier = {
+ .notifier_call = notify_panic,
+ .next = NULL,
+ .priority = 1
+};
+
+static int add_notifier(void)
+{
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &panic_exit_notifier);
+ return 0;
+}
+
+__initcall(add_notifier);
+
+char *mconsole_notify_socket(void)
+{
+ return notify_socket;
+}
+
+EXPORT_SYMBOL(mconsole_notify_socket);
diff --git a/arch/um/drivers/mconsole_kern.h b/arch/um/drivers/mconsole_kern.h
new file mode 100644
index 00000000000..d2fe07e7895
--- /dev/null
+++ b/arch/um/drivers/mconsole_kern.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MCONSOLE_KERN_H__
+#define __MCONSOLE_KERN_H__
+
+#include "linux/list.h"
+#include "mconsole.h"
+
+struct mconsole_entry {
+ struct list_head list;
+ struct mc_request request;
+};
+
+/* All these methods are called in process context. */
+struct mc_device {
+ struct list_head list;
+ char *name;
+ int (*config)(char *, char **);
+ int (*get_config)(char *, char *, int, char **);
+ int (*id)(char **, int *, int *);
+ int (*remove)(int, char **);
+};
+
+#define CONFIG_CHUNK(str, size, current, chunk, end) \
+do { \
+ current += strlen(chunk); \
+ if(current >= size) \
+ str = NULL; \
+ if(str != NULL){ \
+ strcpy(str, chunk); \
+ str += strlen(chunk); \
+ } \
+ if(end) \
+ current++; \
+} while(0)
+
+#ifdef CONFIG_MCONSOLE
+
+extern void mconsole_register_dev(struct mc_device *new);
+
+#else
+
+static inline void mconsole_register_dev(struct mc_device *new)
+{
+}
+
+#endif
+
+#endif
diff --git a/arch/um/drivers/mconsole_user.c b/arch/um/drivers/mconsole_user.c
new file mode 100644
index 00000000000..99209826adb
--- /dev/null
+++ b/arch/um/drivers/mconsole_user.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org)
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <sys/un.h>
+#include "mconsole.h"
+
+static struct mconsole_command commands[] = {
+ /*
+ * With uts namespaces, uts information becomes process-specific, so
+ * we need a process context. If we try handling this in interrupt
+ * context, we may hit an exiting process without a valid uts
+ * namespace.
+ */
+ { "version", mconsole_version, MCONSOLE_PROC },
+ { "halt", mconsole_halt, MCONSOLE_PROC },
+ { "reboot", mconsole_reboot, MCONSOLE_PROC },
+ { "config", mconsole_config, MCONSOLE_PROC },
+ { "remove", mconsole_remove, MCONSOLE_PROC },
+ { "sysrq", mconsole_sysrq, MCONSOLE_INTR },
+ { "help", mconsole_help, MCONSOLE_INTR },
+ { "cad", mconsole_cad, MCONSOLE_INTR },
+ { "stop", mconsole_stop, MCONSOLE_PROC },
+ { "go", mconsole_go, MCONSOLE_INTR },
+ { "log", mconsole_log, MCONSOLE_INTR },
+ { "proc", mconsole_proc, MCONSOLE_PROC },
+ { "stack", mconsole_stack, MCONSOLE_INTR },
+};
+
+/* Initialized in mconsole_init, which is an initcall */
+char mconsole_socket_name[256];
+
+static int mconsole_reply_v0(struct mc_request *req, char *reply)
+{
+ struct iovec iov;
+ struct msghdr msg;
+
+ iov.iov_base = reply;
+ iov.iov_len = strlen(reply);
+
+ msg.msg_name = &(req->origin);
+ msg.msg_namelen = req->originlen;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ msg.msg_control = NULL;
+ msg.msg_controllen = 0;
+ msg.msg_flags = 0;
+
+ return sendmsg(req->originating_fd, &msg, 0);
+}
+
+static struct mconsole_command *mconsole_parse(struct mc_request *req)
+{
+ struct mconsole_command *cmd;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(commands); i++) {
+ cmd = &commands[i];
+ if (!strncmp(req->request.data, cmd->command,
+ strlen(cmd->command))) {
+ return cmd;
+ }
+ }
+ return NULL;
+}
+
+#define MIN(a,b) ((a)<(b) ? (a):(b))
+
+#define STRINGX(x) #x
+#define STRING(x) STRINGX(x)
+
+int mconsole_get_request(int fd, struct mc_request *req)
+{
+ int len;
+
+ req->originlen = sizeof(req->origin);
+ req->len = recvfrom(fd, &req->request, sizeof(req->request), 0,
+ (struct sockaddr *) req->origin, &req->originlen);
+ if (req->len < 0)
+ return 0;
+
+ req->originating_fd = fd;
+
+ if (req->request.magic != MCONSOLE_MAGIC) {
+ /* Unversioned request */
+ len = MIN(sizeof(req->request.data) - 1,
+ strlen((char *) &req->request));
+ memmove(req->request.data, &req->request, len);
+ req->request.data[len] = '\0';
+
+ req->request.magic = MCONSOLE_MAGIC;
+ req->request.version = 0;
+ req->request.len = len;
+
+ mconsole_reply_v0(req, "ERR Version 0 mconsole clients are "
+ "not supported by this driver");
+ return 0;
+ }
+
+ if (req->request.len >= MCONSOLE_MAX_DATA) {
+ mconsole_reply(req, "Request too large", 1, 0);
+ return 0;
+ }
+ if (req->request.version != MCONSOLE_VERSION) {
+ mconsole_reply(req, "This driver only supports version "
+ STRING(MCONSOLE_VERSION) " clients", 1, 0);
+ }
+
+ req->request.data[req->request.len] = '\0';
+ req->cmd = mconsole_parse(req);
+ if (req->cmd == NULL) {
+ mconsole_reply(req, "Unknown command", 1, 0);
+ return 0;
+ }
+
+ return 1;
+}
+
+int mconsole_reply_len(struct mc_request *req, const char *str, int total,
+ int err, int more)
+{
+ /*
+ * XXX This is a stack consumption problem. It'd be nice to
+ * make it global and serialize access to it, but there are a
+ * ton of callers to this function.
+ */
+ struct mconsole_reply reply;
+ int len, n;
+
+ do {
+ reply.err = err;
+
+ /* err can only be true on the first packet */
+ err = 0;
+
+ len = MIN(total, MCONSOLE_MAX_DATA - 1);
+
+ if (len == total) reply.more = more;
+ else reply.more = 1;
+
+ memcpy(reply.data, str, len);
+ reply.data[len] = '\0';
+ total -= len;
+ str += len;
+ reply.len = len + 1;
+
+ len = sizeof(reply) + reply.len - sizeof(reply.data);
+
+ n = sendto(req->originating_fd, &reply, len, 0,
+ (struct sockaddr *) req->origin, req->originlen);
+
+ if (n < 0)
+ return -errno;
+ } while (total > 0);
+ return 0;
+}
+
+int mconsole_reply(struct mc_request *req, const char *str, int err, int more)
+{
+ return mconsole_reply_len(req, str, strlen(str), err, more);
+}
+
+
+int mconsole_unlink_socket(void)
+{
+ unlink(mconsole_socket_name);
+ return 0;
+}
+
+static int notify_sock = -1;
+
+int mconsole_notify(char *sock_name, int type, const void *data, int len)
+{
+ struct sockaddr_un target;
+ struct mconsole_notify packet;
+ int n, err = 0;
+
+ lock_notify();
+ if (notify_sock < 0) {
+ notify_sock = socket(PF_UNIX, SOCK_DGRAM, 0);
+ if (notify_sock < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "mconsole_notify - socket failed, "
+ "errno = %d\n", errno);
+ }
+ }
+ unlock_notify();
+
+ if (err)
+ return err;
+
+ target.sun_family = AF_UNIX;
+ strcpy(target.sun_path, sock_name);
+
+ packet.magic = MCONSOLE_MAGIC;
+ packet.version = MCONSOLE_VERSION;
+ packet.type = type;
+ len = (len > sizeof(packet.data)) ? sizeof(packet.data) : len;
+ packet.len = len;
+ memcpy(packet.data, data, len);
+
+ err = 0;
+ len = sizeof(packet) + packet.len - sizeof(packet.data);
+ n = sendto(notify_sock, &packet, len, 0, (struct sockaddr *) &target,
+ sizeof(target));
+ if (n < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "mconsole_notify - sendto failed, "
+ "errno = %d\n", errno);
+ }
+ return err;
+}
diff --git a/arch/um/drivers/mmapper_kern.c b/arch/um/drivers/mmapper_kern.c
new file mode 100644
index 00000000000..c0ef803c7c7
--- /dev/null
+++ b/arch/um/drivers/mmapper_kern.c
@@ -0,0 +1,134 @@
+/*
+ * arch/um/drivers/mmapper_kern.c
+ *
+ * BRIEF MODULE DESCRIPTION
+ *
+ * Copyright (C) 2000 RidgeRun, Inc.
+ * Author: RidgeRun, Inc.
+ * Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
+ *
+ */
+
+#include <linux/stddef.h>
+#include <linux/types.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+
+#include <asm/uaccess.h>
+#include "mem_user.h"
+
+/* These are set in mmapper_init, which is called at boot time */
+static unsigned long mmapper_size;
+static unsigned long p_buf;
+static char *v_buf;
+
+static ssize_t mmapper_read(struct file *file, char __user *buf, size_t count,
+ loff_t *ppos)
+{
+ return simple_read_from_buffer(buf, count, ppos, v_buf, mmapper_size);
+}
+
+static ssize_t mmapper_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ if (*ppos > mmapper_size)
+ return -EINVAL;
+
+ return simple_write_to_buffer(v_buf, mmapper_size, ppos, buf, count);
+}
+
+static long mmapper_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ return -ENOIOCTLCMD;
+}
+
+static int mmapper_mmap(struct file *file, struct vm_area_struct *vma)
+{
+ int ret = -EINVAL;
+ int size;
+
+ if (vma->vm_pgoff != 0)
+ goto out;
+
+ size = vma->vm_end - vma->vm_start;
+ if (size > mmapper_size)
+ return -EFAULT;
+
+ /*
+ * XXX A comment above remap_pfn_range says it should only be
+ * called when the mm semaphore is held
+ */
+ if (remap_pfn_range(vma, vma->vm_start, p_buf >> PAGE_SHIFT, size,
+ vma->vm_page_prot))
+ goto out;
+ ret = 0;
+out:
+ return ret;
+}
+
+static int mmapper_open(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static int mmapper_release(struct inode *inode, struct file *file)
+{
+ return 0;
+}
+
+static const struct file_operations mmapper_fops = {
+ .owner = THIS_MODULE,
+ .read = mmapper_read,
+ .write = mmapper_write,
+ .unlocked_ioctl = mmapper_ioctl,
+ .mmap = mmapper_mmap,
+ .open = mmapper_open,
+ .release = mmapper_release,
+ .llseek = default_llseek,
+};
+
+/*
+ * No locking needed - only used (and modified) by below initcall and exitcall.
+ */
+static struct miscdevice mmapper_dev = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "mmapper",
+ .fops = &mmapper_fops
+};
+
+static int __init mmapper_init(void)
+{
+ int err;
+
+ printk(KERN_INFO "Mapper v0.1\n");
+
+ v_buf = (char *) find_iomem("mmapper", &mmapper_size);
+ if (mmapper_size == 0) {
+ printk(KERN_ERR "mmapper_init - find_iomem failed\n");
+ return -ENODEV;
+ }
+ p_buf = __pa(v_buf);
+
+ err = misc_register(&mmapper_dev);
+ if (err) {
+ printk(KERN_ERR "mmapper - misc_register failed, err = %d\n",
+ err);
+ return err;
+ }
+ return 0;
+}
+
+static void mmapper_exit(void)
+{
+ misc_deregister(&mmapper_dev);
+}
+
+module_init(mmapper_init);
+module_exit(mmapper_exit);
+
+MODULE_AUTHOR("Greg Lonnon <glonnon@ridgerun.com>");
+MODULE_DESCRIPTION("DSPLinux simulator mmapper driver");
+MODULE_LICENSE("GPL");
diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c
new file mode 100644
index 00000000000..a492e59883a
--- /dev/null
+++ b/arch/um/drivers/net_kern.c
@@ -0,0 +1,914 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ * Licensed under the GPL.
+ */
+
+#include <linux/bootmem.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/inetdevice.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include "init.h"
+#include "irq_kern.h"
+#include "irq_user.h"
+#include "mconsole_kern.h"
+#include "net_kern.h"
+#include "net_user.h"
+
+#define DRIVER_NAME "uml-netdev"
+
+static DEFINE_SPINLOCK(opened_lock);
+static LIST_HEAD(opened);
+
+/*
+ * The drop_skb is used when we can't allocate an skb. The
+ * packet is read into drop_skb in order to get the data off the
+ * connection to the host.
+ * It is reallocated whenever a maximum packet size is seen which is
+ * larger than any seen before. update_drop_skb is called from
+ * eth_configure when a new interface is added.
+ */
+static DEFINE_SPINLOCK(drop_lock);
+static struct sk_buff *drop_skb;
+static int drop_max;
+
+static int update_drop_skb(int max)
+{
+ struct sk_buff *new;
+ unsigned long flags;
+ int err = 0;
+
+ spin_lock_irqsave(&drop_lock, flags);
+
+ if (max <= drop_max)
+ goto out;
+
+ err = -ENOMEM;
+ new = dev_alloc_skb(max);
+ if (new == NULL)
+ goto out;
+
+ skb_put(new, max);
+
+ kfree_skb(drop_skb);
+ drop_skb = new;
+ drop_max = max;
+ err = 0;
+out:
+ spin_unlock_irqrestore(&drop_lock, flags);
+
+ return err;
+}
+
+static int uml_net_rx(struct net_device *dev)
+{
+ struct uml_net_private *lp = netdev_priv(dev);
+ int pkt_len;
+ struct sk_buff *skb;
+
+ /* If we can't allocate memory, try again next round. */
+ skb = dev_alloc_skb(lp->max_packet);
+ if (skb == NULL) {
+ drop_skb->dev = dev;
+ /* Read a packet into drop_skb and don't do anything with it. */
+ (*lp->read)(lp->fd, drop_skb, lp);
+ dev->stats.rx_dropped++;
+ return 0;
+ }
+
+ skb->dev = dev;
+ skb_put(skb, lp->max_packet);
+ skb_reset_mac_header(skb);
+ pkt_len = (*lp->read)(lp->fd, skb, lp);
+
+ if (pkt_len > 0) {
+ skb_trim(skb, pkt_len);
+ skb->protocol = (*lp->protocol)(skb);
+
+ dev->stats.rx_bytes += skb->len;
+ dev->stats.rx_packets++;
+ netif_rx(skb);
+ return pkt_len;
+ }
+
+ kfree_skb(skb);
+ return pkt_len;
+}
+
+static void uml_dev_close(struct work_struct *work)
+{
+ struct uml_net_private *lp =
+ container_of(work, struct uml_net_private, work);
+ dev_close(lp->dev);
+}
+
+static irqreturn_t uml_net_interrupt(int irq, void *dev_id)
+{
+ struct net_device *dev = dev_id;
+ struct uml_net_private *lp = netdev_priv(dev);
+ int err;
+
+ if (!netif_running(dev))
+ return IRQ_NONE;
+
+ spin_lock(&lp->lock);
+ while ((err = uml_net_rx(dev)) > 0) ;
+ if (err < 0) {
+ printk(KERN_ERR
+ "Device '%s' read returned %d, shutting it down\n",
+ dev->name, err);
+ /* dev_close can't be called in interrupt context, and takes
+ * again lp->lock.
+ * And dev_close() can be safely called multiple times on the
+ * same device, since it tests for (dev->flags & IFF_UP). So
+ * there's no harm in delaying the device shutdown.
+ * Furthermore, the workqueue will not re-enqueue an already
+ * enqueued work item. */
+ schedule_work(&lp->work);
+ goto out;
+ }
+ reactivate_fd(lp->fd, UM_ETH_IRQ);
+
+out:
+ spin_unlock(&lp->lock);
+ return IRQ_HANDLED;
+}
+
+static int uml_net_open(struct net_device *dev)
+{
+ struct uml_net_private *lp = netdev_priv(dev);
+ int err;
+
+ if (lp->fd >= 0) {
+ err = -ENXIO;
+ goto out;
+ }
+
+ lp->fd = (*lp->open)(&lp->user);
+ if (lp->fd < 0) {
+ err = lp->fd;
+ goto out;
+ }
+
+ err = um_request_irq(dev->irq, lp->fd, IRQ_READ, uml_net_interrupt,
+ IRQF_DISABLED | IRQF_SHARED, dev->name, dev);
+ if (err != 0) {
+ printk(KERN_ERR "uml_net_open: failed to get irq(%d)\n", err);
+ err = -ENETUNREACH;
+ goto out_close;
+ }
+
+ lp->tl.data = (unsigned long) &lp->user;
+ netif_start_queue(dev);
+
+ /* clear buffer - it can happen that the host side of the interface
+ * is full when we get here. In this case, new data is never queued,
+ * SIGIOs never arrive, and the net never works.
+ */
+ while ((err = uml_net_rx(dev)) > 0) ;
+
+ spin_lock(&opened_lock);
+ list_add(&lp->list, &opened);
+ spin_unlock(&opened_lock);
+
+ return 0;
+out_close:
+ if (lp->close != NULL) (*lp->close)(lp->fd, &lp->user);
+ lp->fd = -1;
+out:
+ return err;
+}
+
+static int uml_net_close(struct net_device *dev)
+{
+ struct uml_net_private *lp = netdev_priv(dev);
+
+ netif_stop_queue(dev);
+
+ free_irq(dev->irq, dev);
+ if (lp->close != NULL)
+ (*lp->close)(lp->fd, &lp->user);
+ lp->fd = -1;
+
+ spin_lock(&opened_lock);
+ list_del(&lp->list);
+ spin_unlock(&opened_lock);
+
+ return 0;
+}
+
+static int uml_net_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct uml_net_private *lp = netdev_priv(dev);
+ unsigned long flags;
+ int len;
+
+ netif_stop_queue(dev);
+
+ spin_lock_irqsave(&lp->lock, flags);
+
+ len = (*lp->write)(lp->fd, skb, lp);
+
+ if (len == skb->len) {
+ dev->stats.tx_packets++;
+ dev->stats.tx_bytes += skb->len;
+ dev->trans_start = jiffies;
+ netif_start_queue(dev);
+
+ /* this is normally done in the interrupt when tx finishes */
+ netif_wake_queue(dev);
+ }
+ else if (len == 0) {
+ netif_start_queue(dev);
+ dev->stats.tx_dropped++;
+ }
+ else {
+ netif_start_queue(dev);
+ printk(KERN_ERR "uml_net_start_xmit: failed(%d)\n", len);
+ }
+
+ spin_unlock_irqrestore(&lp->lock, flags);
+
+ dev_kfree_skb(skb);
+
+ return NETDEV_TX_OK;
+}
+
+static void uml_net_set_multicast_list(struct net_device *dev)
+{
+ return;
+}
+
+static void uml_net_tx_timeout(struct net_device *dev)
+{
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+}
+
+static int uml_net_change_mtu(struct net_device *dev, int new_mtu)
+{
+ dev->mtu = new_mtu;
+
+ return 0;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void uml_net_poll_controller(struct net_device *dev)
+{
+ disable_irq(dev->irq);
+ uml_net_interrupt(dev->irq, dev);
+ enable_irq(dev->irq);
+}
+#endif
+
+static void uml_net_get_drvinfo(struct net_device *dev,
+ struct ethtool_drvinfo *info)
+{
+ strcpy(info->driver, DRIVER_NAME);
+ strcpy(info->version, "42");
+}
+
+static const struct ethtool_ops uml_net_ethtool_ops = {
+ .get_drvinfo = uml_net_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+};
+
+static void uml_net_user_timer_expire(unsigned long _conn)
+{
+#ifdef undef
+ struct connection *conn = (struct connection *)_conn;
+
+ dprintk(KERN_INFO "uml_net_user_timer_expire [%p]\n", conn);
+ do_connect(conn);
+#endif
+}
+
+static void setup_etheraddr(char *str, unsigned char *addr, char *name)
+{
+ char *end;
+ int i;
+
+ if (str == NULL)
+ goto random;
+
+ for (i = 0; i < 6; i++) {
+ addr[i] = simple_strtoul(str, &end, 16);
+ if ((end == str) ||
+ ((*end != ':') && (*end != ',') && (*end != '\0'))) {
+ printk(KERN_ERR
+ "setup_etheraddr: failed to parse '%s' "
+ "as an ethernet address\n", str);
+ goto random;
+ }
+ str = end + 1;
+ }
+ if (is_multicast_ether_addr(addr)) {
+ printk(KERN_ERR
+ "Attempt to assign a multicast ethernet address to a "
+ "device disallowed\n");
+ goto random;
+ }
+ if (!is_valid_ether_addr(addr)) {
+ printk(KERN_ERR
+ "Attempt to assign an invalid ethernet address to a "
+ "device disallowed\n");
+ goto random;
+ }
+ if (!is_local_ether_addr(addr)) {
+ printk(KERN_WARNING
+ "Warning: Assigning a globally valid ethernet "
+ "address to a device\n");
+ printk(KERN_WARNING "You should set the 2nd rightmost bit in "
+ "the first byte of the MAC,\n");
+ printk(KERN_WARNING "i.e. %02x:%02x:%02x:%02x:%02x:%02x\n",
+ addr[0] | 0x02, addr[1], addr[2], addr[3], addr[4],
+ addr[5]);
+ }
+ return;
+
+random:
+ printk(KERN_INFO
+ "Choosing a random ethernet address for device %s\n", name);
+ random_ether_addr(addr);
+}
+
+static DEFINE_SPINLOCK(devices_lock);
+static LIST_HEAD(devices);
+
+static struct platform_driver uml_net_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static void net_device_release(struct device *dev)
+{
+ struct uml_net *device = dev_get_drvdata(dev);
+ struct net_device *netdev = device->dev;
+ struct uml_net_private *lp = netdev_priv(netdev);
+
+ if (lp->remove != NULL)
+ (*lp->remove)(&lp->user);
+ list_del(&device->list);
+ kfree(device);
+ free_netdev(netdev);
+}
+
+static const struct net_device_ops uml_netdev_ops = {
+ .ndo_open = uml_net_open,
+ .ndo_stop = uml_net_close,
+ .ndo_start_xmit = uml_net_start_xmit,
+ .ndo_set_rx_mode = uml_net_set_multicast_list,
+ .ndo_tx_timeout = uml_net_tx_timeout,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_change_mtu = uml_net_change_mtu,
+ .ndo_validate_addr = eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = uml_net_poll_controller,
+#endif
+};
+
+/*
+ * Ensures that platform_driver_register is called only once by
+ * eth_configure. Will be set in an initcall.
+ */
+static int driver_registered;
+
+static void eth_configure(int n, void *init, char *mac,
+ struct transport *transport)
+{
+ struct uml_net *device;
+ struct net_device *dev;
+ struct uml_net_private *lp;
+ int err, size;
+
+ size = transport->private_size + sizeof(struct uml_net_private);
+
+ device = kzalloc(sizeof(*device), GFP_KERNEL);
+ if (device == NULL) {
+ printk(KERN_ERR "eth_configure failed to allocate struct "
+ "uml_net\n");
+ return;
+ }
+
+ dev = alloc_etherdev(size);
+ if (dev == NULL) {
+ printk(KERN_ERR "eth_configure: failed to allocate struct "
+ "net_device for eth%d\n", n);
+ goto out_free_device;
+ }
+
+ INIT_LIST_HEAD(&device->list);
+ device->index = n;
+
+ /* If this name ends up conflicting with an existing registered
+ * netdevice, that is OK, register_netdev{,ice}() will notice this
+ * and fail.
+ */
+ snprintf(dev->name, sizeof(dev->name), "eth%d", n);
+
+ setup_etheraddr(mac, device->mac, dev->name);
+
+ printk(KERN_INFO "Netdevice %d (%pM) : ", n, device->mac);
+
+ lp = netdev_priv(dev);
+ /* This points to the transport private data. It's still clear, but we
+ * must memset it to 0 *now*. Let's help the drivers. */
+ memset(lp, 0, size);
+ INIT_WORK(&lp->work, uml_dev_close);
+
+ /* sysfs register */
+ if (!driver_registered) {
+ platform_driver_register(&uml_net_driver);
+ driver_registered = 1;
+ }
+ device->pdev.id = n;
+ device->pdev.name = DRIVER_NAME;
+ device->pdev.dev.release = net_device_release;
+ dev_set_drvdata(&device->pdev.dev, device);
+ if (platform_device_register(&device->pdev))
+ goto out_free_netdev;
+ SET_NETDEV_DEV(dev,&device->pdev.dev);
+
+ device->dev = dev;
+
+ /*
+ * These just fill in a data structure, so there's no failure
+ * to be worried about.
+ */
+ (*transport->kern->init)(dev, init);
+
+ *lp = ((struct uml_net_private)
+ { .list = LIST_HEAD_INIT(lp->list),
+ .dev = dev,
+ .fd = -1,
+ .mac = { 0xfe, 0xfd, 0x0, 0x0, 0x0, 0x0},
+ .max_packet = transport->user->max_packet,
+ .protocol = transport->kern->protocol,
+ .open = transport->user->open,
+ .close = transport->user->close,
+ .remove = transport->user->remove,
+ .read = transport->kern->read,
+ .write = transport->kern->write,
+ .add_address = transport->user->add_address,
+ .delete_address = transport->user->delete_address });
+
+ init_timer(&lp->tl);
+ spin_lock_init(&lp->lock);
+ lp->tl.function = uml_net_user_timer_expire;
+ memcpy(lp->mac, device->mac, sizeof(lp->mac));
+
+ if ((transport->user->init != NULL) &&
+ ((*transport->user->init)(&lp->user, dev) != 0))
+ goto out_unregister;
+
+ /* don't use eth_mac_addr, it will not work here */
+ memcpy(dev->dev_addr, device->mac, ETH_ALEN);
+ dev->mtu = transport->user->mtu;
+ dev->netdev_ops = &uml_netdev_ops;
+ dev->ethtool_ops = &uml_net_ethtool_ops;
+ dev->watchdog_timeo = (HZ >> 1);
+ dev->irq = UM_ETH_IRQ;
+
+ err = update_drop_skb(lp->max_packet);
+ if (err)
+ goto out_undo_user_init;
+
+ rtnl_lock();
+ err = register_netdevice(dev);
+ rtnl_unlock();
+ if (err)
+ goto out_undo_user_init;
+
+ spin_lock(&devices_lock);
+ list_add(&device->list, &devices);
+ spin_unlock(&devices_lock);
+
+ return;
+
+out_undo_user_init:
+ if (transport->user->remove != NULL)
+ (*transport->user->remove)(&lp->user);
+out_unregister:
+ platform_device_unregister(&device->pdev);
+ return; /* platform_device_unregister frees dev and device */
+out_free_netdev:
+ free_netdev(dev);
+out_free_device:
+ kfree(device);
+}
+
+static struct uml_net *find_device(int n)
+{
+ struct uml_net *device;
+ struct list_head *ele;
+
+ spin_lock(&devices_lock);
+ list_for_each(ele, &devices) {
+ device = list_entry(ele, struct uml_net, list);
+ if (device->index == n)
+ goto out;
+ }
+ device = NULL;
+ out:
+ spin_unlock(&devices_lock);
+ return device;
+}
+
+static int eth_parse(char *str, int *index_out, char **str_out,
+ char **error_out)
+{
+ char *end;
+ int n, err = -EINVAL;
+
+ n = simple_strtoul(str, &end, 0);
+ if (end == str) {
+ *error_out = "Bad device number";
+ return err;
+ }
+
+ str = end;
+ if (*str != '=') {
+ *error_out = "Expected '=' after device number";
+ return err;
+ }
+
+ str++;
+ if (find_device(n)) {
+ *error_out = "Device already configured";
+ return err;
+ }
+
+ *index_out = n;
+ *str_out = str;
+ return 0;
+}
+
+struct eth_init {
+ struct list_head list;
+ char *init;
+ int index;
+};
+
+static DEFINE_SPINLOCK(transports_lock);
+static LIST_HEAD(transports);
+
+/* Filled in during early boot */
+static LIST_HEAD(eth_cmd_line);
+
+static int check_transport(struct transport *transport, char *eth, int n,
+ void **init_out, char **mac_out)
+{
+ int len;
+
+ len = strlen(transport->name);
+ if (strncmp(eth, transport->name, len))
+ return 0;
+
+ eth += len;
+ if (*eth == ',')
+ eth++;
+ else if (*eth != '\0')
+ return 0;
+
+ *init_out = kmalloc(transport->setup_size, GFP_KERNEL);
+ if (*init_out == NULL)
+ return 1;
+
+ if (!transport->setup(eth, mac_out, *init_out)) {
+ kfree(*init_out);
+ *init_out = NULL;
+ }
+ return 1;
+}
+
+void register_transport(struct transport *new)
+{
+ struct list_head *ele, *next;
+ struct eth_init *eth;
+ void *init;
+ char *mac = NULL;
+ int match;
+
+ spin_lock(&transports_lock);
+ BUG_ON(!list_empty(&new->list));
+ list_add(&new->list, &transports);
+ spin_unlock(&transports_lock);
+
+ list_for_each_safe(ele, next, &eth_cmd_line) {
+ eth = list_entry(ele, struct eth_init, list);
+ match = check_transport(new, eth->init, eth->index, &init,
+ &mac);
+ if (!match)
+ continue;
+ else if (init != NULL) {
+ eth_configure(eth->index, init, mac, new);
+ kfree(init);
+ }
+ list_del(&eth->list);
+ }
+}
+
+static int eth_setup_common(char *str, int index)
+{
+ struct list_head *ele;
+ struct transport *transport;
+ void *init;
+ char *mac = NULL;
+ int found = 0;
+
+ spin_lock(&transports_lock);
+ list_for_each(ele, &transports) {
+ transport = list_entry(ele, struct transport, list);
+ if (!check_transport(transport, str, index, &init, &mac))
+ continue;
+ if (init != NULL) {
+ eth_configure(index, init, mac, transport);
+ kfree(init);
+ }
+ found = 1;
+ break;
+ }
+
+ spin_unlock(&transports_lock);
+ return found;
+}
+
+static int __init eth_setup(char *str)
+{
+ struct eth_init *new;
+ char *error;
+ int n, err;
+
+ err = eth_parse(str, &n, &str, &error);
+ if (err) {
+ printk(KERN_ERR "eth_setup - Couldn't parse '%s' : %s\n",
+ str, error);
+ return 1;
+ }
+
+ new = alloc_bootmem(sizeof(*new));
+ if (new == NULL) {
+ printk(KERN_ERR "eth_init : alloc_bootmem failed\n");
+ return 1;
+ }
+
+ INIT_LIST_HEAD(&new->list);
+ new->index = n;
+ new->init = str;
+
+ list_add_tail(&new->list, &eth_cmd_line);
+ return 1;
+}
+
+__setup("eth", eth_setup);
+__uml_help(eth_setup,
+"eth[0-9]+=<transport>,<options>\n"
+" Configure a network device.\n\n"
+);
+
+static int net_config(char *str, char **error_out)
+{
+ int n, err;
+
+ err = eth_parse(str, &n, &str, error_out);
+ if (err)
+ return err;
+
+ /* This string is broken up and the pieces used by the underlying
+ * driver. So, it is freed only if eth_setup_common fails.
+ */
+ str = kstrdup(str, GFP_KERNEL);
+ if (str == NULL) {
+ *error_out = "net_config failed to strdup string";
+ return -ENOMEM;
+ }
+ err = !eth_setup_common(str, n);
+ if (err)
+ kfree(str);
+ return err;
+}
+
+static int net_id(char **str, int *start_out, int *end_out)
+{
+ char *end;
+ int n;
+
+ n = simple_strtoul(*str, &end, 0);
+ if ((*end != '\0') || (end == *str))
+ return -1;
+
+ *start_out = n;
+ *end_out = n;
+ *str = end;
+ return n;
+}
+
+static int net_remove(int n, char **error_out)
+{
+ struct uml_net *device;
+ struct net_device *dev;
+ struct uml_net_private *lp;
+
+ device = find_device(n);
+ if (device == NULL)
+ return -ENODEV;
+
+ dev = device->dev;
+ lp = netdev_priv(dev);
+ if (lp->fd > 0)
+ return -EBUSY;
+ unregister_netdev(dev);
+ platform_device_unregister(&device->pdev);
+
+ return 0;
+}
+
+static struct mc_device net_mc = {
+ .list = LIST_HEAD_INIT(net_mc.list),
+ .name = "eth",
+ .config = net_config,
+ .get_config = NULL,
+ .id = net_id,
+ .remove = net_remove,
+};
+
+#ifdef CONFIG_INET
+static int uml_inetaddr_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ struct in_ifaddr *ifa = ptr;
+ struct net_device *dev = ifa->ifa_dev->dev;
+ struct uml_net_private *lp;
+ void (*proc)(unsigned char *, unsigned char *, void *);
+ unsigned char addr_buf[4], netmask_buf[4];
+
+ if (dev->netdev_ops->ndo_open != uml_net_open)
+ return NOTIFY_DONE;
+
+ lp = netdev_priv(dev);
+
+ proc = NULL;
+ switch (event) {
+ case NETDEV_UP:
+ proc = lp->add_address;
+ break;
+ case NETDEV_DOWN:
+ proc = lp->delete_address;
+ break;
+ }
+ if (proc != NULL) {
+ memcpy(addr_buf, &ifa->ifa_address, sizeof(addr_buf));
+ memcpy(netmask_buf, &ifa->ifa_mask, sizeof(netmask_buf));
+ (*proc)(addr_buf, netmask_buf, &lp->user);
+ }
+ return NOTIFY_DONE;
+}
+
+/* uml_net_init shouldn't be called twice on two CPUs at the same time */
+static struct notifier_block uml_inetaddr_notifier = {
+ .notifier_call = uml_inetaddr_event,
+};
+
+static void inet_register(void)
+{
+ struct list_head *ele;
+ struct uml_net_private *lp;
+ struct in_device *ip;
+ struct in_ifaddr *in;
+
+ register_inetaddr_notifier(&uml_inetaddr_notifier);
+
+ /* Devices may have been opened already, so the uml_inetaddr_notifier
+ * didn't get a chance to run for them. This fakes it so that
+ * addresses which have already been set up get handled properly.
+ */
+ spin_lock(&opened_lock);
+ list_for_each(ele, &opened) {
+ lp = list_entry(ele, struct uml_net_private, list);
+ ip = lp->dev->ip_ptr;
+ if (ip == NULL)
+ continue;
+ in = ip->ifa_list;
+ while (in != NULL) {
+ uml_inetaddr_event(NULL, NETDEV_UP, in);
+ in = in->ifa_next;
+ }
+ }
+ spin_unlock(&opened_lock);
+}
+#else
+static inline void inet_register(void)
+{
+}
+#endif
+
+static int uml_net_init(void)
+{
+ mconsole_register_dev(&net_mc);
+ inet_register();
+ return 0;
+}
+
+__initcall(uml_net_init);
+
+static void close_devices(void)
+{
+ struct list_head *ele;
+ struct uml_net_private *lp;
+
+ spin_lock(&opened_lock);
+ list_for_each(ele, &opened) {
+ lp = list_entry(ele, struct uml_net_private, list);
+ free_irq(lp->dev->irq, lp->dev);
+ if ((lp->close != NULL) && (lp->fd >= 0))
+ (*lp->close)(lp->fd, &lp->user);
+ if (lp->remove != NULL)
+ (*lp->remove)(&lp->user);
+ }
+ spin_unlock(&opened_lock);
+}
+
+__uml_exitcall(close_devices);
+
+void iter_addresses(void *d, void (*cb)(unsigned char *, unsigned char *,
+ void *),
+ void *arg)
+{
+ struct net_device *dev = d;
+ struct in_device *ip = dev->ip_ptr;
+ struct in_ifaddr *in;
+ unsigned char address[4], netmask[4];
+
+ if (ip == NULL) return;
+ in = ip->ifa_list;
+ while (in != NULL) {
+ memcpy(address, &in->ifa_address, sizeof(address));
+ memcpy(netmask, &in->ifa_mask, sizeof(netmask));
+ (*cb)(address, netmask, arg);
+ in = in->ifa_next;
+ }
+}
+
+int dev_netmask(void *d, void *m)
+{
+ struct net_device *dev = d;
+ struct in_device *ip = dev->ip_ptr;
+ struct in_ifaddr *in;
+ __be32 *mask_out = m;
+
+ if (ip == NULL)
+ return 1;
+
+ in = ip->ifa_list;
+ if (in == NULL)
+ return 1;
+
+ *mask_out = in->ifa_mask;
+ return 0;
+}
+
+void *get_output_buffer(int *len_out)
+{
+ void *ret;
+
+ ret = (void *) __get_free_pages(GFP_KERNEL, 0);
+ if (ret) *len_out = PAGE_SIZE;
+ else *len_out = 0;
+ return ret;
+}
+
+void free_output_buffer(void *buffer)
+{
+ free_pages((unsigned long) buffer, 0);
+}
+
+int tap_setup_common(char *str, char *type, char **dev_name, char **mac_out,
+ char **gate_addr)
+{
+ char *remain;
+
+ remain = split_if_spec(str, dev_name, mac_out, gate_addr, NULL);
+ if (remain != NULL) {
+ printk(KERN_ERR "tap_setup_common - Extra garbage on "
+ "specification : '%s'\n", remain);
+ return 1;
+ }
+
+ return 0;
+}
+
+unsigned short eth_protocol(struct sk_buff *skb)
+{
+ return eth_type_trans(skb, skb->dev);
+}
diff --git a/arch/um/drivers/net_user.c b/arch/um/drivers/net_user.c
new file mode 100644
index 00000000000..05090c37fa8
--- /dev/null
+++ b/arch/um/drivers/net_user.c
@@ -0,0 +1,269 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <stddef.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include "net_user.h"
+#include "os.h"
+#include "um_malloc.h"
+
+int tap_open_common(void *dev, char *gate_addr)
+{
+ int tap_addr[4];
+
+ if (gate_addr == NULL)
+ return 0;
+ if (sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0],
+ &tap_addr[1], &tap_addr[2], &tap_addr[3]) != 4) {
+ printk(UM_KERN_ERR "Invalid tap IP address - '%s'\n",
+ gate_addr);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+void tap_check_ips(char *gate_addr, unsigned char *eth_addr)
+{
+ int tap_addr[4];
+
+ if ((gate_addr != NULL) &&
+ (sscanf(gate_addr, "%d.%d.%d.%d", &tap_addr[0],
+ &tap_addr[1], &tap_addr[2], &tap_addr[3]) == 4) &&
+ (eth_addr[0] == tap_addr[0]) &&
+ (eth_addr[1] == tap_addr[1]) &&
+ (eth_addr[2] == tap_addr[2]) &&
+ (eth_addr[3] == tap_addr[3])) {
+ printk(UM_KERN_ERR "The tap IP address and the UML eth IP "
+ "address must be different\n");
+ }
+}
+
+/* Do reliable error handling as this fails frequently enough. */
+void read_output(int fd, char *output, int len)
+{
+ int remain, ret, expected;
+ char c;
+ char *str;
+
+ if (output == NULL) {
+ output = &c;
+ len = sizeof(c);
+ }
+
+ *output = '\0';
+ ret = read(fd, &remain, sizeof(remain));
+
+ if (ret != sizeof(remain)) {
+ if (ret < 0)
+ ret = -errno;
+ expected = sizeof(remain);
+ str = "length";
+ goto err;
+ }
+
+ while (remain != 0) {
+ expected = (remain < len) ? remain : len;
+ ret = read(fd, output, expected);
+ if (ret != expected) {
+ if (ret < 0)
+ ret = -errno;
+ str = "data";
+ goto err;
+ }
+ remain -= ret;
+ }
+
+ return;
+
+err:
+ if (ret < 0)
+ printk(UM_KERN_ERR "read_output - read of %s failed, "
+ "errno = %d\n", str, -ret);
+ else
+ printk(UM_KERN_ERR "read_output - read of %s failed, read only "
+ "%d of %d bytes\n", str, ret, expected);
+}
+
+int net_read(int fd, void *buf, int len)
+{
+ int n;
+
+ n = read(fd, buf, len);
+
+ if ((n < 0) && (errno == EAGAIN))
+ return 0;
+ else if (n == 0)
+ return -ENOTCONN;
+ return n;
+}
+
+int net_recvfrom(int fd, void *buf, int len)
+{
+ int n;
+
+ CATCH_EINTR(n = recvfrom(fd, buf, len, 0, NULL, NULL));
+ if (n < 0) {
+ if (errno == EAGAIN)
+ return 0;
+ return -errno;
+ }
+ else if (n == 0)
+ return -ENOTCONN;
+ return n;
+}
+
+int net_write(int fd, void *buf, int len)
+{
+ int n;
+
+ n = write(fd, buf, len);
+
+ if ((n < 0) && (errno == EAGAIN))
+ return 0;
+ else if (n == 0)
+ return -ENOTCONN;
+ return n;
+}
+
+int net_send(int fd, void *buf, int len)
+{
+ int n;
+
+ CATCH_EINTR(n = send(fd, buf, len, 0));
+ if (n < 0) {
+ if (errno == EAGAIN)
+ return 0;
+ return -errno;
+ }
+ else if (n == 0)
+ return -ENOTCONN;
+ return n;
+}
+
+int net_sendto(int fd, void *buf, int len, void *to, int sock_len)
+{
+ int n;
+
+ CATCH_EINTR(n = sendto(fd, buf, len, 0, (struct sockaddr *) to,
+ sock_len));
+ if (n < 0) {
+ if (errno == EAGAIN)
+ return 0;
+ return -errno;
+ }
+ else if (n == 0)
+ return -ENOTCONN;
+ return n;
+}
+
+struct change_pre_exec_data {
+ int close_me;
+ int stdout;
+};
+
+static void change_pre_exec(void *arg)
+{
+ struct change_pre_exec_data *data = arg;
+
+ close(data->close_me);
+ dup2(data->stdout, 1);
+}
+
+static int change_tramp(char **argv, char *output, int output_len)
+{
+ int pid, fds[2], err;
+ struct change_pre_exec_data pe_data;
+
+ err = os_pipe(fds, 1, 0);
+ if (err < 0) {
+ printk(UM_KERN_ERR "change_tramp - pipe failed, err = %d\n",
+ -err);
+ return err;
+ }
+ pe_data.close_me = fds[0];
+ pe_data.stdout = fds[1];
+ pid = run_helper(change_pre_exec, &pe_data, argv);
+
+ if (pid > 0) /* Avoid hang as we won't get data in failure case. */
+ read_output(fds[0], output, output_len);
+
+ close(fds[0]);
+ close(fds[1]);
+
+ if (pid > 0)
+ helper_wait(pid);
+ return pid;
+}
+
+static void change(char *dev, char *what, unsigned char *addr,
+ unsigned char *netmask)
+{
+ char addr_buf[sizeof("255.255.255.255\0")];
+ char netmask_buf[sizeof("255.255.255.255\0")];
+ char version[sizeof("nnnnn\0")];
+ char *argv[] = { "uml_net", version, what, dev, addr_buf,
+ netmask_buf, NULL };
+ char *output;
+ int output_len, pid;
+
+ sprintf(version, "%d", UML_NET_VERSION);
+ sprintf(addr_buf, "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);
+ sprintf(netmask_buf, "%d.%d.%d.%d", netmask[0], netmask[1],
+ netmask[2], netmask[3]);
+
+ output_len = UM_KERN_PAGE_SIZE;
+ output = uml_kmalloc(output_len, UM_GFP_KERNEL);
+ if (output == NULL)
+ printk(UM_KERN_ERR "change : failed to allocate output "
+ "buffer\n");
+
+ pid = change_tramp(argv, output, output_len);
+ if (pid < 0) {
+ kfree(output);
+ return;
+ }
+
+ if (output != NULL) {
+ printk("%s", output);
+ kfree(output);
+ }
+}
+
+void open_addr(unsigned char *addr, unsigned char *netmask, void *arg)
+{
+ change(arg, "add", addr, netmask);
+}
+
+void close_addr(unsigned char *addr, unsigned char *netmask, void *arg)
+{
+ change(arg, "del", addr, netmask);
+}
+
+char *split_if_spec(char *str, ...)
+{
+ char **arg, *end;
+ va_list ap;
+
+ va_start(ap, str);
+ while ((arg = va_arg(ap, char **)) != NULL) {
+ if (*str == '\0')
+ return NULL;
+ end = strchr(str, ',');
+ if (end != str)
+ *arg = str;
+ if (end == NULL)
+ return NULL;
+ *end++ = '\0';
+ str = end;
+ }
+ va_end(ap);
+ return str;
+}
diff --git a/arch/um/drivers/null.c b/arch/um/drivers/null.c
new file mode 100644
index 00000000000..2b45a1446c8
--- /dev/null
+++ b/arch/um/drivers/null.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <stddef.h>
+#include <errno.h>
+#include <fcntl.h>
+#include "chan_user.h"
+#include "os.h"
+
+/* This address is used only as a unique identifier */
+static int null_chan;
+
+static void *null_init(char *str, int device, const struct chan_opts *opts)
+{
+ return &null_chan;
+}
+
+static int null_open(int input, int output, int primary, void *d,
+ char **dev_out)
+{
+ int fd;
+
+ *dev_out = NULL;
+
+ fd = open(DEV_NULL, O_RDWR);
+ return (fd < 0) ? -errno : fd;
+}
+
+static int null_read(int fd, char *c_out, void *unused)
+{
+ return -ENODEV;
+}
+
+static void null_free(void *data)
+{
+}
+
+const struct chan_ops null_ops = {
+ .type = "null",
+ .init = null_init,
+ .open = null_open,
+ .close = generic_close,
+ .read = null_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = null_free,
+ .winch = 0,
+};
diff --git a/arch/um/drivers/pcap_kern.c b/arch/um/drivers/pcap_kern.c
new file mode 100644
index 00000000000..2860525f8ff
--- /dev/null
+++ b/arch/um/drivers/pcap_kern.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL.
+ */
+
+#include "linux/init.h"
+#include <linux/netdevice.h>
+#include "net_kern.h"
+#include "pcap_user.h"
+
+struct pcap_init {
+ char *host_if;
+ int promisc;
+ int optimize;
+ char *filter;
+};
+
+void pcap_init(struct net_device *dev, void *data)
+{
+ struct uml_net_private *pri;
+ struct pcap_data *ppri;
+ struct pcap_init *init = data;
+
+ pri = netdev_priv(dev);
+ ppri = (struct pcap_data *) pri->user;
+ ppri->host_if = init->host_if;
+ ppri->promisc = init->promisc;
+ ppri->optimize = init->optimize;
+ ppri->filter = init->filter;
+
+ printk("pcap backend, host interface %s\n", ppri->host_if);
+}
+
+static int pcap_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return pcap_user_read(fd, skb_mac_header(skb),
+ skb->dev->mtu + ETH_HEADER_OTHER,
+ (struct pcap_data *) &lp->user);
+}
+
+static int pcap_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return -EPERM;
+}
+
+static const struct net_kern_info pcap_kern_info = {
+ .init = pcap_init,
+ .protocol = eth_protocol,
+ .read = pcap_read,
+ .write = pcap_write,
+};
+
+int pcap_setup(char *str, char **mac_out, void *data)
+{
+ struct pcap_init *init = data;
+ char *remain, *host_if = NULL, *options[2] = { NULL, NULL };
+ int i;
+
+ *init = ((struct pcap_init)
+ { .host_if = "eth0",
+ .promisc = 1,
+ .optimize = 0,
+ .filter = NULL });
+
+ remain = split_if_spec(str, &host_if, &init->filter,
+ &options[0], &options[1], mac_out, NULL);
+ if (remain != NULL) {
+ printk(KERN_ERR "pcap_setup - Extra garbage on "
+ "specification : '%s'\n", remain);
+ return 0;
+ }
+
+ if (host_if != NULL)
+ init->host_if = host_if;
+
+ for (i = 0; i < ARRAY_SIZE(options); i++) {
+ if (options[i] == NULL)
+ continue;
+ if (!strcmp(options[i], "promisc"))
+ init->promisc = 1;
+ else if (!strcmp(options[i], "nopromisc"))
+ init->promisc = 0;
+ else if (!strcmp(options[i], "optimize"))
+ init->optimize = 1;
+ else if (!strcmp(options[i], "nooptimize"))
+ init->optimize = 0;
+ else {
+ printk(KERN_ERR "pcap_setup : bad option - '%s'\n",
+ options[i]);
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static struct transport pcap_transport = {
+ .list = LIST_HEAD_INIT(pcap_transport.list),
+ .name = "pcap",
+ .setup = pcap_setup,
+ .user = &pcap_user_info,
+ .kern = &pcap_kern_info,
+ .private_size = sizeof(struct pcap_data),
+ .setup_size = sizeof(struct pcap_init),
+};
+
+static int register_pcap(void)
+{
+ register_transport(&pcap_transport);
+ return 0;
+}
+
+late_initcall(register_pcap);
diff --git a/arch/um/drivers/pcap_user.c b/arch/um/drivers/pcap_user.c
new file mode 100644
index 00000000000..702a75b190e
--- /dev/null
+++ b/arch/um/drivers/pcap_user.c
@@ -0,0 +1,137 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL.
+ */
+
+#include <errno.h>
+#include <pcap.h>
+#include <string.h>
+#include <asm/types.h>
+#include "net_user.h"
+#include "pcap_user.h"
+#include "um_malloc.h"
+
+#define PCAP_FD(p) (*(int *)(p))
+
+static int pcap_user_init(void *data, void *dev)
+{
+ struct pcap_data *pri = data;
+ pcap_t *p;
+ char errors[PCAP_ERRBUF_SIZE];
+
+ p = pcap_open_live(pri->host_if, ETH_MAX_PACKET + ETH_HEADER_OTHER,
+ pri->promisc, 0, errors);
+ if (p == NULL) {
+ printk(UM_KERN_ERR "pcap_user_init : pcap_open_live failed - "
+ "'%s'\n", errors);
+ return -EINVAL;
+ }
+
+ pri->dev = dev;
+ pri->pcap = p;
+ return 0;
+}
+
+static int pcap_open(void *data)
+{
+ struct pcap_data *pri = data;
+ __u32 netmask;
+ int err;
+
+ if (pri->pcap == NULL)
+ return -ENODEV;
+
+ if (pri->filter != NULL) {
+ err = dev_netmask(pri->dev, &netmask);
+ if (err < 0) {
+ printk(UM_KERN_ERR "pcap_open : dev_netmask failed\n");
+ return -EIO;
+ }
+
+ pri->compiled = uml_kmalloc(sizeof(struct bpf_program),
+ UM_GFP_KERNEL);
+ if (pri->compiled == NULL) {
+ printk(UM_KERN_ERR "pcap_open : kmalloc failed\n");
+ return -ENOMEM;
+ }
+
+ err = pcap_compile(pri->pcap,
+ (struct bpf_program *) pri->compiled,
+ pri->filter, pri->optimize, netmask);
+ if (err < 0) {
+ printk(UM_KERN_ERR "pcap_open : pcap_compile failed - "
+ "'%s'\n", pcap_geterr(pri->pcap));
+ goto out;
+ }
+
+ err = pcap_setfilter(pri->pcap, pri->compiled);
+ if (err < 0) {
+ printk(UM_KERN_ERR "pcap_open : pcap_setfilter "
+ "failed - '%s'\n", pcap_geterr(pri->pcap));
+ goto out;
+ }
+ }
+
+ return PCAP_FD(pri->pcap);
+
+ out:
+ kfree(pri->compiled);
+ return -EIO;
+}
+
+static void pcap_remove(void *data)
+{
+ struct pcap_data *pri = data;
+
+ if (pri->compiled != NULL)
+ pcap_freecode(pri->compiled);
+
+ if (pri->pcap != NULL)
+ pcap_close(pri->pcap);
+}
+
+struct pcap_handler_data {
+ char *buffer;
+ int len;
+};
+
+static void handler(u_char *data, const struct pcap_pkthdr *header,
+ const u_char *packet)
+{
+ int len;
+
+ struct pcap_handler_data *hdata = (struct pcap_handler_data *) data;
+
+ len = hdata->len < header->caplen ? hdata->len : header->caplen;
+ memcpy(hdata->buffer, packet, len);
+ hdata->len = len;
+}
+
+int pcap_user_read(int fd, void *buffer, int len, struct pcap_data *pri)
+{
+ struct pcap_handler_data hdata = ((struct pcap_handler_data)
+ { .buffer = buffer,
+ .len = len });
+ int n;
+
+ n = pcap_dispatch(pri->pcap, 1, handler, (u_char *) &hdata);
+ if (n < 0) {
+ printk(UM_KERN_ERR "pcap_dispatch failed - %s\n",
+ pcap_geterr(pri->pcap));
+ return -EIO;
+ }
+ else if (n == 0)
+ return 0;
+ return hdata.len;
+}
+
+const struct net_user_info pcap_user_info = {
+ .init = pcap_user_init,
+ .open = pcap_open,
+ .close = NULL,
+ .remove = pcap_remove,
+ .add_address = NULL,
+ .delete_address = NULL,
+ .mtu = ETH_MAX_PACKET,
+ .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
+};
diff --git a/arch/um/drivers/pcap_user.h b/arch/um/drivers/pcap_user.h
new file mode 100644
index 00000000000..d8ba6153f91
--- /dev/null
+++ b/arch/um/drivers/pcap_user.h
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "net_user.h"
+
+struct pcap_data {
+ char *host_if;
+ int promisc;
+ int optimize;
+ char *filter;
+ void *compiled;
+ void *pcap;
+ void *dev;
+};
+
+extern const struct net_user_info pcap_user_info;
+
+extern int pcap_user_read(int fd, void *buf, int len, struct pcap_data *pri);
+
diff --git a/arch/um/drivers/port.h b/arch/um/drivers/port.h
new file mode 100644
index 00000000000..372a80c0556
--- /dev/null
+++ b/arch/um/drivers/port.h
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __PORT_H__
+#define __PORT_H__
+
+extern void *port_data(int port);
+extern int port_wait(void *data);
+extern void port_kern_close(void *d);
+extern int port_connection(int fd, int *socket_out, int *pid_out);
+extern int port_listen_fd(int port);
+extern void port_read(int fd, void *data);
+extern void port_kern_free(void *d);
+extern int port_rcv_fd(int fd);
+extern void port_remove_dev(void *d);
+
+#endif
+
diff --git a/arch/um/drivers/port_kern.c b/arch/um/drivers/port_kern.c
new file mode 100644
index 00000000000..a11573be096
--- /dev/null
+++ b/arch/um/drivers/port_kern.c
@@ -0,0 +1,306 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/completion.h"
+#include "linux/interrupt.h"
+#include "linux/list.h"
+#include "linux/mutex.h"
+#include "linux/slab.h"
+#include "linux/workqueue.h"
+#include "asm/atomic.h"
+#include "init.h"
+#include "irq_kern.h"
+#include "os.h"
+#include "port.h"
+
+struct port_list {
+ struct list_head list;
+ atomic_t wait_count;
+ int has_connection;
+ struct completion done;
+ int port;
+ int fd;
+ spinlock_t lock;
+ struct list_head pending;
+ struct list_head connections;
+};
+
+struct port_dev {
+ struct port_list *port;
+ int helper_pid;
+ int telnetd_pid;
+};
+
+struct connection {
+ struct list_head list;
+ int fd;
+ int helper_pid;
+ int socket[2];
+ int telnetd_pid;
+ struct port_list *port;
+};
+
+static irqreturn_t pipe_interrupt(int irq, void *data)
+{
+ struct connection *conn = data;
+ int fd;
+
+ fd = os_rcv_fd(conn->socket[0], &conn->helper_pid);
+ if (fd < 0) {
+ if (fd == -EAGAIN)
+ return IRQ_NONE;
+
+ printk(KERN_ERR "pipe_interrupt : os_rcv_fd returned %d\n",
+ -fd);
+ os_close_file(conn->fd);
+ }
+
+ list_del(&conn->list);
+
+ conn->fd = fd;
+ list_add(&conn->list, &conn->port->connections);
+
+ complete(&conn->port->done);
+ return IRQ_HANDLED;
+}
+
+#define NO_WAITER_MSG \
+ "****\n" \
+ "There are currently no UML consoles waiting for port connections.\n" \
+ "Either disconnect from one to make it available or activate some more\n" \
+ "by enabling more consoles in the UML /etc/inittab.\n" \
+ "****\n"
+
+static int port_accept(struct port_list *port)
+{
+ struct connection *conn;
+ int fd, socket[2], pid;
+
+ fd = port_connection(port->fd, socket, &pid);
+ if (fd < 0) {
+ if (fd != -EAGAIN)
+ printk(KERN_ERR "port_accept : port_connection "
+ "returned %d\n", -fd);
+ goto out;
+ }
+
+ conn = kmalloc(sizeof(*conn), GFP_ATOMIC);
+ if (conn == NULL) {
+ printk(KERN_ERR "port_accept : failed to allocate "
+ "connection\n");
+ goto out_close;
+ }
+ *conn = ((struct connection)
+ { .list = LIST_HEAD_INIT(conn->list),
+ .fd = fd,
+ .socket = { socket[0], socket[1] },
+ .telnetd_pid = pid,
+ .port = port });
+
+ if (um_request_irq(TELNETD_IRQ, socket[0], IRQ_READ, pipe_interrupt,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
+ "telnetd", conn)) {
+ printk(KERN_ERR "port_accept : failed to get IRQ for "
+ "telnetd\n");
+ goto out_free;
+ }
+
+ if (atomic_read(&port->wait_count) == 0) {
+ os_write_file(fd, NO_WAITER_MSG, sizeof(NO_WAITER_MSG));
+ printk(KERN_ERR "No one waiting for port\n");
+ }
+ list_add(&conn->list, &port->pending);
+ return 1;
+
+ out_free:
+ kfree(conn);
+ out_close:
+ os_close_file(fd);
+ os_kill_process(pid, 1);
+ out:
+ return 0;
+}
+
+static DEFINE_MUTEX(ports_mutex);
+static LIST_HEAD(ports);
+
+static void port_work_proc(struct work_struct *unused)
+{
+ struct port_list *port;
+ struct list_head *ele;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ list_for_each(ele, &ports) {
+ port = list_entry(ele, struct port_list, list);
+ if (!port->has_connection)
+ continue;
+
+ reactivate_fd(port->fd, ACCEPT_IRQ);
+ while (port_accept(port))
+ ;
+ port->has_connection = 0;
+ }
+ local_irq_restore(flags);
+}
+
+DECLARE_WORK(port_work, port_work_proc);
+
+static irqreturn_t port_interrupt(int irq, void *data)
+{
+ struct port_list *port = data;
+
+ port->has_connection = 1;
+ schedule_work(&port_work);
+ return IRQ_HANDLED;
+}
+
+void *port_data(int port_num)
+{
+ struct list_head *ele;
+ struct port_list *port;
+ struct port_dev *dev = NULL;
+ int fd;
+
+ mutex_lock(&ports_mutex);
+ list_for_each(ele, &ports) {
+ port = list_entry(ele, struct port_list, list);
+ if (port->port == port_num)
+ goto found;
+ }
+ port = kmalloc(sizeof(struct port_list), GFP_KERNEL);
+ if (port == NULL) {
+ printk(KERN_ERR "Allocation of port list failed\n");
+ goto out;
+ }
+
+ fd = port_listen_fd(port_num);
+ if (fd < 0) {
+ printk(KERN_ERR "binding to port %d failed, errno = %d\n",
+ port_num, -fd);
+ goto out_free;
+ }
+
+ if (um_request_irq(ACCEPT_IRQ, fd, IRQ_READ, port_interrupt,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
+ "port", port)) {
+ printk(KERN_ERR "Failed to get IRQ for port %d\n", port_num);
+ goto out_close;
+ }
+
+ *port = ((struct port_list)
+ { .list = LIST_HEAD_INIT(port->list),
+ .wait_count = ATOMIC_INIT(0),
+ .has_connection = 0,
+ .port = port_num,
+ .fd = fd,
+ .pending = LIST_HEAD_INIT(port->pending),
+ .connections = LIST_HEAD_INIT(port->connections) });
+ spin_lock_init(&port->lock);
+ init_completion(&port->done);
+ list_add(&port->list, &ports);
+
+ found:
+ dev = kmalloc(sizeof(struct port_dev), GFP_KERNEL);
+ if (dev == NULL) {
+ printk(KERN_ERR "Allocation of port device entry failed\n");
+ goto out;
+ }
+
+ *dev = ((struct port_dev) { .port = port,
+ .helper_pid = -1,
+ .telnetd_pid = -1 });
+ goto out;
+
+ out_close:
+ os_close_file(fd);
+ out_free:
+ kfree(port);
+ out:
+ mutex_unlock(&ports_mutex);
+ return dev;
+}
+
+int port_wait(void *data)
+{
+ struct port_dev *dev = data;
+ struct connection *conn;
+ struct port_list *port = dev->port;
+ int fd;
+
+ atomic_inc(&port->wait_count);
+ while (1) {
+ fd = -ERESTARTSYS;
+ if (wait_for_completion_interruptible(&port->done))
+ goto out;
+
+ spin_lock(&port->lock);
+
+ conn = list_entry(port->connections.next, struct connection,
+ list);
+ list_del(&conn->list);
+ spin_unlock(&port->lock);
+
+ os_shutdown_socket(conn->socket[0], 1, 1);
+ os_close_file(conn->socket[0]);
+ os_shutdown_socket(conn->socket[1], 1, 1);
+ os_close_file(conn->socket[1]);
+
+ /* This is done here because freeing an IRQ can't be done
+ * within the IRQ handler. So, pipe_interrupt always ups
+ * the semaphore regardless of whether it got a successful
+ * connection. Then we loop here throwing out failed
+ * connections until a good one is found.
+ */
+ free_irq(TELNETD_IRQ, conn);
+
+ if (conn->fd >= 0)
+ break;
+ os_close_file(conn->fd);
+ kfree(conn);
+ }
+
+ fd = conn->fd;
+ dev->helper_pid = conn->helper_pid;
+ dev->telnetd_pid = conn->telnetd_pid;
+ kfree(conn);
+ out:
+ atomic_dec(&port->wait_count);
+ return fd;
+}
+
+void port_remove_dev(void *d)
+{
+ struct port_dev *dev = d;
+
+ if (dev->helper_pid != -1)
+ os_kill_process(dev->helper_pid, 0);
+ if (dev->telnetd_pid != -1)
+ os_kill_process(dev->telnetd_pid, 1);
+ dev->helper_pid = -1;
+ dev->telnetd_pid = -1;
+}
+
+void port_kern_free(void *d)
+{
+ struct port_dev *dev = d;
+
+ port_remove_dev(dev);
+ kfree(dev);
+}
+
+static void free_port(void)
+{
+ struct list_head *ele;
+ struct port_list *port;
+
+ list_for_each(ele, &ports) {
+ port = list_entry(ele, struct port_list, list);
+ free_irq_by_fd(port->fd);
+ os_close_file(port->fd);
+ }
+}
+
+__uml_exitcall(free_port);
diff --git a/arch/um/drivers/port_user.c b/arch/um/drivers/port_user.c
new file mode 100644
index 00000000000..7b010b76ddf
--- /dev/null
+++ b/arch/um/drivers/port_user.c
@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <termios.h>
+#include <unistd.h>
+#include <netinet/in.h>
+#include "chan_user.h"
+#include "os.h"
+#include "port.h"
+#include "um_malloc.h"
+
+struct port_chan {
+ int raw;
+ struct termios tt;
+ void *kernel_data;
+ char dev[sizeof("32768\0")];
+};
+
+static void *port_init(char *str, int device, const struct chan_opts *opts)
+{
+ struct port_chan *data;
+ void *kern_data;
+ char *end;
+ int port;
+
+ if (*str != ':') {
+ printk(UM_KERN_ERR "port_init : channel type 'port' must "
+ "specify a port number\n");
+ return NULL;
+ }
+ str++;
+ port = strtoul(str, &end, 0);
+ if ((*end != '\0') || (end == str)) {
+ printk(UM_KERN_ERR "port_init : couldn't parse port '%s'\n",
+ str);
+ return NULL;
+ }
+
+ kern_data = port_data(port);
+ if (kern_data == NULL)
+ return NULL;
+
+ data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
+ if (data == NULL)
+ goto err;
+
+ *data = ((struct port_chan) { .raw = opts->raw,
+ .kernel_data = kern_data });
+ sprintf(data->dev, "%d", port);
+
+ return data;
+ err:
+ port_kern_free(kern_data);
+ return NULL;
+}
+
+static void port_free(void *d)
+{
+ struct port_chan *data = d;
+
+ port_kern_free(data->kernel_data);
+ kfree(data);
+}
+
+static int port_open(int input, int output, int primary, void *d,
+ char **dev_out)
+{
+ struct port_chan *data = d;
+ int fd, err;
+
+ fd = port_wait(data->kernel_data);
+ if ((fd >= 0) && data->raw) {
+ CATCH_EINTR(err = tcgetattr(fd, &data->tt));
+ if (err)
+ return err;
+
+ err = raw(fd);
+ if (err)
+ return err;
+ }
+ *dev_out = data->dev;
+ return fd;
+}
+
+static void port_close(int fd, void *d)
+{
+ struct port_chan *data = d;
+
+ port_remove_dev(data->kernel_data);
+ os_close_file(fd);
+}
+
+const struct chan_ops port_ops = {
+ .type = "port",
+ .init = port_init,
+ .open = port_open,
+ .close = port_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = port_free,
+ .winch = 1,
+};
+
+int port_listen_fd(int port)
+{
+ struct sockaddr_in addr;
+ int fd, err, arg;
+
+ fd = socket(PF_INET, SOCK_STREAM, 0);
+ if (fd == -1)
+ return -errno;
+
+ arg = 1;
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &arg, sizeof(arg)) < 0) {
+ err = -errno;
+ goto out;
+ }
+
+ addr.sin_family = AF_INET;
+ addr.sin_port = htons(port);
+ addr.sin_addr.s_addr = htonl(INADDR_ANY);
+ if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
+ err = -errno;
+ goto out;
+ }
+
+ if (listen(fd, 1) < 0) {
+ err = -errno;
+ goto out;
+ }
+
+ err = os_set_fd_block(fd, 0);
+ if (err < 0)
+ goto out;
+
+ return fd;
+ out:
+ close(fd);
+ return err;
+}
+
+struct port_pre_exec_data {
+ int sock_fd;
+ int pipe_fd;
+};
+
+static void port_pre_exec(void *arg)
+{
+ struct port_pre_exec_data *data = arg;
+
+ dup2(data->sock_fd, 0);
+ dup2(data->sock_fd, 1);
+ dup2(data->sock_fd, 2);
+ close(data->sock_fd);
+ dup2(data->pipe_fd, 3);
+ shutdown(3, SHUT_RD);
+ close(data->pipe_fd);
+}
+
+int port_connection(int fd, int *socket, int *pid_out)
+{
+ int new, err;
+ char *argv[] = { "/usr/sbin/in.telnetd", "-L",
+ "/usr/lib/uml/port-helper", NULL };
+ struct port_pre_exec_data data;
+
+ new = accept(fd, NULL, 0);
+ if (new < 0)
+ return -errno;
+
+ err = os_pipe(socket, 0, 0);
+ if (err < 0)
+ goto out_close;
+
+ data = ((struct port_pre_exec_data)
+ { .sock_fd = new,
+ .pipe_fd = socket[1] });
+
+ err = run_helper(port_pre_exec, &data, argv);
+ if (err < 0)
+ goto out_shutdown;
+
+ *pid_out = err;
+ return new;
+
+ out_shutdown:
+ shutdown(socket[0], SHUT_RDWR);
+ close(socket[0]);
+ shutdown(socket[1], SHUT_RDWR);
+ close(socket[1]);
+ out_close:
+ close(new);
+ return err;
+}
diff --git a/arch/um/drivers/pty.c b/arch/um/drivers/pty.c
new file mode 100644
index 00000000000..cff2b75d31f
--- /dev/null
+++ b/arch/um/drivers/pty.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <termios.h>
+#include <sys/stat.h>
+#include "chan_user.h"
+#include "os.h"
+#include "um_malloc.h"
+
+struct pty_chan {
+ void (*announce)(char *dev_name, int dev);
+ int dev;
+ int raw;
+ struct termios tt;
+ char dev_name[sizeof("/dev/pts/0123456\0")];
+};
+
+static void *pty_chan_init(char *str, int device, const struct chan_opts *opts)
+{
+ struct pty_chan *data;
+
+ data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
+ if (data == NULL)
+ return NULL;
+
+ *data = ((struct pty_chan) { .announce = opts->announce,
+ .dev = device,
+ .raw = opts->raw });
+ return data;
+}
+
+static int pts_open(int input, int output, int primary, void *d,
+ char **dev_out)
+{
+ struct pty_chan *data = d;
+ char *dev;
+ int fd, err;
+
+ fd = get_pty();
+ if (fd < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "open_pts : Failed to open pts\n");
+ return err;
+ }
+
+ if (data->raw) {
+ CATCH_EINTR(err = tcgetattr(fd, &data->tt));
+ if (err)
+ goto out_close;
+
+ err = raw(fd);
+ if (err)
+ goto out_close;
+ }
+
+ dev = ptsname(fd);
+ sprintf(data->dev_name, "%s", dev);
+ *dev_out = data->dev_name;
+
+ if (data->announce)
+ (*data->announce)(dev, data->dev);
+
+ return fd;
+
+out_close:
+ close(fd);
+ return err;
+}
+
+static int getmaster(char *line)
+{
+ struct stat buf;
+ char *pty, *bank, *cp;
+ int master, err;
+
+ pty = &line[strlen("/dev/ptyp")];
+ for (bank = "pqrs"; *bank; bank++) {
+ line[strlen("/dev/pty")] = *bank;
+ *pty = '0';
+ /* Did we hit the end ? */
+ if ((stat(line, &buf) < 0) && (errno == ENOENT))
+ break;
+
+ for (cp = "0123456789abcdef"; *cp; cp++) {
+ *pty = *cp;
+ master = open(line, O_RDWR);
+ if (master >= 0) {
+ char *tp = &line[strlen("/dev/")];
+
+ /* verify slave side is usable */
+ *tp = 't';
+ err = access(line, R_OK | W_OK);
+ *tp = 'p';
+ if (!err)
+ return master;
+ close(master);
+ }
+ }
+ }
+
+ printk(UM_KERN_ERR "getmaster - no usable host pty devices\n");
+ return -ENOENT;
+}
+
+static int pty_open(int input, int output, int primary, void *d,
+ char **dev_out)
+{
+ struct pty_chan *data = d;
+ int fd, err;
+ char dev[sizeof("/dev/ptyxx\0")] = "/dev/ptyxx";
+
+ fd = getmaster(dev);
+ if (fd < 0)
+ return fd;
+
+ if (data->raw) {
+ err = raw(fd);
+ if (err) {
+ close(fd);
+ return err;
+ }
+ }
+
+ if (data->announce)
+ (*data->announce)(dev, data->dev);
+
+ sprintf(data->dev_name, "%s", dev);
+ *dev_out = data->dev_name;
+
+ return fd;
+}
+
+const struct chan_ops pty_ops = {
+ .type = "pty",
+ .init = pty_chan_init,
+ .open = pty_open,
+ .close = generic_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = generic_free,
+ .winch = 0,
+};
+
+const struct chan_ops pts_ops = {
+ .type = "pts",
+ .init = pty_chan_init,
+ .open = pts_open,
+ .close = generic_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = generic_free,
+ .winch = 0,
+};
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
new file mode 100644
index 00000000000..981085a93f3
--- /dev/null
+++ b/arch/um/drivers/random.c
@@ -0,0 +1,169 @@
+/* Copyright (C) 2005 - 2008 Jeff Dike <jdike@{linux.intel,addtoit}.com> */
+
+/* Much of this ripped from drivers/char/hw_random.c, see there for other
+ * copyright.
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ */
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/delay.h>
+#include <asm/uaccess.h>
+#include "irq_kern.h"
+#include "os.h"
+
+/*
+ * core module and version information
+ */
+#define RNG_VERSION "1.0.0"
+#define RNG_MODULE_NAME "hw_random"
+
+#define RNG_MISCDEV_MINOR 183 /* official */
+
+/* Changed at init time, in the non-modular case, and at module load
+ * time, in the module case. Presumably, the module subsystem
+ * protects against a module being loaded twice at the same time.
+ */
+static int random_fd = -1;
+static DECLARE_WAIT_QUEUE_HEAD(host_read_wait);
+
+static int rng_dev_open (struct inode *inode, struct file *filp)
+{
+ /* enforce read-only access to this chrdev */
+ if ((filp->f_mode & FMODE_READ) == 0)
+ return -EINVAL;
+ if ((filp->f_mode & FMODE_WRITE) != 0)
+ return -EINVAL;
+
+ return 0;
+}
+
+static atomic_t host_sleep_count = ATOMIC_INIT(0);
+
+static ssize_t rng_dev_read (struct file *filp, char __user *buf, size_t size,
+ loff_t *offp)
+{
+ u32 data;
+ int n, ret = 0, have_data;
+
+ while (size) {
+ n = os_read_file(random_fd, &data, sizeof(data));
+ if (n > 0) {
+ have_data = n;
+ while (have_data && size) {
+ if (put_user((u8) data, buf++)) {
+ ret = ret ? : -EFAULT;
+ break;
+ }
+ size--;
+ ret++;
+ have_data--;
+ data >>= 8;
+ }
+ }
+ else if (n == -EAGAIN) {
+ DECLARE_WAITQUEUE(wait, current);
+
+ if (filp->f_flags & O_NONBLOCK)
+ return ret ? : -EAGAIN;
+
+ atomic_inc(&host_sleep_count);
+ reactivate_fd(random_fd, RANDOM_IRQ);
+ add_sigio_fd(random_fd);
+
+ add_wait_queue(&host_read_wait, &wait);
+ set_task_state(current, TASK_INTERRUPTIBLE);
+
+ schedule();
+ set_task_state(current, TASK_RUNNING);
+ remove_wait_queue(&host_read_wait, &wait);
+
+ if (atomic_dec_and_test(&host_sleep_count)) {
+ ignore_sigio_fd(random_fd);
+ deactivate_fd(random_fd, RANDOM_IRQ);
+ }
+ }
+ else
+ return n;
+
+ if (signal_pending (current))
+ return ret ? : -ERESTARTSYS;
+ }
+ return ret;
+}
+
+static const struct file_operations rng_chrdev_ops = {
+ .owner = THIS_MODULE,
+ .open = rng_dev_open,
+ .read = rng_dev_read,
+ .llseek = noop_llseek,
+};
+
+/* rng_init shouldn't be called more than once at boot time */
+static struct miscdevice rng_miscdev = {
+ RNG_MISCDEV_MINOR,
+ RNG_MODULE_NAME,
+ &rng_chrdev_ops,
+};
+
+static irqreturn_t random_interrupt(int irq, void *data)
+{
+ wake_up(&host_read_wait);
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * rng_init - initialize RNG module
+ */
+static int __init rng_init (void)
+{
+ int err;
+
+ err = os_open_file("/dev/random", of_read(OPENFLAGS()), 0);
+ if (err < 0)
+ goto out;
+
+ random_fd = err;
+
+ err = um_request_irq(RANDOM_IRQ, random_fd, IRQ_READ, random_interrupt,
+ IRQF_DISABLED | IRQF_SAMPLE_RANDOM, "random",
+ NULL);
+ if (err)
+ goto err_out_cleanup_hw;
+
+ sigio_broken(random_fd, 1);
+
+ err = misc_register (&rng_miscdev);
+ if (err) {
+ printk (KERN_ERR RNG_MODULE_NAME ": misc device register "
+ "failed\n");
+ goto err_out_cleanup_hw;
+ }
+out:
+ return err;
+
+err_out_cleanup_hw:
+ os_close_file(random_fd);
+ random_fd = -1;
+ goto out;
+}
+
+/*
+ * rng_cleanup - shutdown RNG module
+ */
+static void __exit rng_cleanup (void)
+{
+ os_close_file(random_fd);
+ misc_deregister (&rng_miscdev);
+}
+
+module_init (rng_init);
+module_exit (rng_cleanup);
+
+MODULE_DESCRIPTION("UML Host Random Number Generator (RNG) driver");
+MODULE_LICENSE("GPL");
diff --git a/arch/um/drivers/slip.h b/arch/um/drivers/slip.h
new file mode 100644
index 00000000000..c64f8c61d27
--- /dev/null
+++ b/arch/um/drivers/slip.h
@@ -0,0 +1,20 @@
+#ifndef __UM_SLIP_H
+#define __UM_SLIP_H
+
+#include "slip_common.h"
+
+struct slip_data {
+ void *dev;
+ char name[sizeof("slnnnnn\0")];
+ char *addr;
+ char *gate_addr;
+ int slave;
+ struct slip_proto slip;
+};
+
+extern const struct net_user_info slip_user_info;
+
+extern int slip_user_read(int fd, void *buf, int len, struct slip_data *pri);
+extern int slip_user_write(int fd, void *buf, int len, struct slip_data *pri);
+
+#endif
diff --git a/arch/um/drivers/slip_common.c b/arch/um/drivers/slip_common.c
new file mode 100644
index 00000000000..e89cfc68fc3
--- /dev/null
+++ b/arch/um/drivers/slip_common.c
@@ -0,0 +1,54 @@
+#include <string.h>
+#include "slip_common.h"
+#include "net_user.h"
+
+int slip_proto_read(int fd, void *buf, int len, struct slip_proto *slip)
+{
+ int i, n, size, start;
+
+ if(slip->more > 0){
+ i = 0;
+ while(i < slip->more){
+ size = slip_unesc(slip->ibuf[i++], slip->ibuf,
+ &slip->pos, &slip->esc);
+ if(size){
+ memcpy(buf, slip->ibuf, size);
+ memmove(slip->ibuf, &slip->ibuf[i],
+ slip->more - i);
+ slip->more = slip->more - i;
+ return size;
+ }
+ }
+ slip->more = 0;
+ }
+
+ n = net_read(fd, &slip->ibuf[slip->pos],
+ sizeof(slip->ibuf) - slip->pos);
+ if(n <= 0)
+ return n;
+
+ start = slip->pos;
+ for(i = 0; i < n; i++){
+ size = slip_unesc(slip->ibuf[start + i], slip->ibuf,&slip->pos,
+ &slip->esc);
+ if(size){
+ memcpy(buf, slip->ibuf, size);
+ memmove(slip->ibuf, &slip->ibuf[start+i+1],
+ n - (i + 1));
+ slip->more = n - (i + 1);
+ return size;
+ }
+ }
+ return 0;
+}
+
+int slip_proto_write(int fd, void *buf, int len, struct slip_proto *slip)
+{
+ int actual, n;
+
+ actual = slip_esc(buf, slip->obuf, len);
+ n = net_write(fd, slip->obuf, actual);
+ if(n < 0)
+ return n;
+ else return len;
+}
diff --git a/arch/um/drivers/slip_common.h b/arch/um/drivers/slip_common.h
new file mode 100644
index 00000000000..d574e0a9dc1
--- /dev/null
+++ b/arch/um/drivers/slip_common.h
@@ -0,0 +1,105 @@
+#ifndef __UM_SLIP_COMMON_H
+#define __UM_SLIP_COMMON_H
+
+#define BUF_SIZE 1500
+ /* two bytes each for a (pathological) max packet of escaped chars + *
+ * terminating END char + initial END char */
+#define ENC_BUF_SIZE (2 * BUF_SIZE + 2)
+
+/* SLIP protocol characters. */
+#define SLIP_END 0300 /* indicates end of frame */
+#define SLIP_ESC 0333 /* indicates byte stuffing */
+#define SLIP_ESC_END 0334 /* ESC ESC_END means END 'data' */
+#define SLIP_ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */
+
+static inline int slip_unesc(unsigned char c, unsigned char *buf, int *pos,
+ int *esc)
+{
+ int ret;
+
+ switch(c){
+ case SLIP_END:
+ *esc = 0;
+ ret=*pos;
+ *pos=0;
+ return(ret);
+ case SLIP_ESC:
+ *esc = 1;
+ return(0);
+ case SLIP_ESC_ESC:
+ if(*esc){
+ *esc = 0;
+ c = SLIP_ESC;
+ }
+ break;
+ case SLIP_ESC_END:
+ if(*esc){
+ *esc = 0;
+ c = SLIP_END;
+ }
+ break;
+ }
+ buf[(*pos)++] = c;
+ return(0);
+}
+
+static inline int slip_esc(unsigned char *s, unsigned char *d, int len)
+{
+ unsigned char *ptr = d;
+ unsigned char c;
+
+ /*
+ * Send an initial END character to flush out any
+ * data that may have accumulated in the receiver
+ * due to line noise.
+ */
+
+ *ptr++ = SLIP_END;
+
+ /*
+ * For each byte in the packet, send the appropriate
+ * character sequence, according to the SLIP protocol.
+ */
+
+ while (len-- > 0) {
+ switch(c = *s++) {
+ case SLIP_END:
+ *ptr++ = SLIP_ESC;
+ *ptr++ = SLIP_ESC_END;
+ break;
+ case SLIP_ESC:
+ *ptr++ = SLIP_ESC;
+ *ptr++ = SLIP_ESC_ESC;
+ break;
+ default:
+ *ptr++ = c;
+ break;
+ }
+ }
+ *ptr++ = SLIP_END;
+ return (ptr - d);
+}
+
+struct slip_proto {
+ unsigned char ibuf[ENC_BUF_SIZE];
+ unsigned char obuf[ENC_BUF_SIZE];
+ int more; /* more data: do not read fd until ibuf has been drained */
+ int pos;
+ int esc;
+};
+
+static inline void slip_proto_init(struct slip_proto * slip)
+{
+ memset(slip->ibuf, 0, sizeof(slip->ibuf));
+ memset(slip->obuf, 0, sizeof(slip->obuf));
+ slip->more = 0;
+ slip->pos = 0;
+ slip->esc = 0;
+}
+
+extern int slip_proto_read(int fd, void *buf, int len,
+ struct slip_proto *slip);
+extern int slip_proto_write(int fd, void *buf, int len,
+ struct slip_proto *slip);
+
+#endif
diff --git a/arch/um/drivers/slip_kern.c b/arch/um/drivers/slip_kern.c
new file mode 100644
index 00000000000..dd2aadc14af
--- /dev/null
+++ b/arch/um/drivers/slip_kern.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL.
+ */
+
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/netdevice.h>
+#include "net_kern.h"
+#include "slip.h"
+
+struct slip_init {
+ char *gate_addr;
+};
+
+static void slip_init(struct net_device *dev, void *data)
+{
+ struct uml_net_private *private;
+ struct slip_data *spri;
+ struct slip_init *init = data;
+
+ private = netdev_priv(dev);
+ spri = (struct slip_data *) private->user;
+
+ memset(spri->name, 0, sizeof(spri->name));
+ spri->addr = NULL;
+ spri->gate_addr = init->gate_addr;
+ spri->slave = -1;
+ spri->dev = dev;
+
+ slip_proto_init(&spri->slip);
+
+ dev->hard_header_len = 0;
+ dev->header_ops = NULL;
+ dev->addr_len = 0;
+ dev->type = ARPHRD_SLIP;
+ dev->tx_queue_len = 256;
+ dev->flags = IFF_NOARP;
+ printk("SLIP backend - SLIP IP = %s\n", spri->gate_addr);
+}
+
+static unsigned short slip_protocol(struct sk_buff *skbuff)
+{
+ return htons(ETH_P_IP);
+}
+
+static int slip_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return slip_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
+ (struct slip_data *) &lp->user);
+}
+
+static int slip_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return slip_user_write(fd, skb->data, skb->len,
+ (struct slip_data *) &lp->user);
+}
+
+static const struct net_kern_info slip_kern_info = {
+ .init = slip_init,
+ .protocol = slip_protocol,
+ .read = slip_read,
+ .write = slip_write,
+};
+
+static int slip_setup(char *str, char **mac_out, void *data)
+{
+ struct slip_init *init = data;
+
+ *init = ((struct slip_init) { .gate_addr = NULL });
+
+ if (str[0] != '\0')
+ init->gate_addr = str;
+ return 1;
+}
+
+static struct transport slip_transport = {
+ .list = LIST_HEAD_INIT(slip_transport.list),
+ .name = "slip",
+ .setup = slip_setup,
+ .user = &slip_user_info,
+ .kern = &slip_kern_info,
+ .private_size = sizeof(struct slip_data),
+ .setup_size = sizeof(struct slip_init),
+};
+
+static int register_slip(void)
+{
+ register_transport(&slip_transport);
+ return 0;
+}
+
+late_initcall(register_slip);
diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
new file mode 100644
index 00000000000..932b4d69bec
--- /dev/null
+++ b/arch/um/drivers/slip_user.c
@@ -0,0 +1,251 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/termios.h>
+#include <sys/wait.h>
+#include "net_user.h"
+#include "os.h"
+#include "slip.h"
+#include "um_malloc.h"
+
+static int slip_user_init(void *data, void *dev)
+{
+ struct slip_data *pri = data;
+
+ pri->dev = dev;
+ return 0;
+}
+
+static int set_up_tty(int fd)
+{
+ int i;
+ struct termios tios;
+
+ if (tcgetattr(fd, &tios) < 0) {
+ printk(UM_KERN_ERR "could not get initial terminal "
+ "attributes\n");
+ return -1;
+ }
+
+ tios.c_cflag = CS8 | CREAD | HUPCL | CLOCAL;
+ tios.c_iflag = IGNBRK | IGNPAR;
+ tios.c_oflag = 0;
+ tios.c_lflag = 0;
+ for (i = 0; i < NCCS; i++)
+ tios.c_cc[i] = 0;
+ tios.c_cc[VMIN] = 1;
+ tios.c_cc[VTIME] = 0;
+
+ cfsetospeed(&tios, B38400);
+ cfsetispeed(&tios, B38400);
+
+ if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) {
+ printk(UM_KERN_ERR "failed to set terminal attributes\n");
+ return -1;
+ }
+ return 0;
+}
+
+struct slip_pre_exec_data {
+ int stdin;
+ int stdout;
+ int close_me;
+};
+
+static void slip_pre_exec(void *arg)
+{
+ struct slip_pre_exec_data *data = arg;
+
+ if (data->stdin >= 0)
+ dup2(data->stdin, 0);
+ dup2(data->stdout, 1);
+ if (data->close_me >= 0)
+ close(data->close_me);
+}
+
+static int slip_tramp(char **argv, int fd)
+{
+ struct slip_pre_exec_data pe_data;
+ char *output;
+ int pid, fds[2], err, output_len;
+
+ err = os_pipe(fds, 1, 0);
+ if (err < 0) {
+ printk(UM_KERN_ERR "slip_tramp : pipe failed, err = %d\n",
+ -err);
+ goto out;
+ }
+
+ err = 0;
+ pe_data.stdin = fd;
+ pe_data.stdout = fds[1];
+ pe_data.close_me = fds[0];
+ err = run_helper(slip_pre_exec, &pe_data, argv);
+ if (err < 0)
+ goto out_close;
+ pid = err;
+
+ output_len = UM_KERN_PAGE_SIZE;
+ output = uml_kmalloc(output_len, UM_GFP_KERNEL);
+ if (output == NULL) {
+ printk(UM_KERN_ERR "slip_tramp : failed to allocate output "
+ "buffer\n");
+ os_kill_process(pid, 1);
+ err = -ENOMEM;
+ goto out_close;
+ }
+
+ close(fds[1]);
+ read_output(fds[0], output, output_len);
+ printk("%s", output);
+
+ err = helper_wait(pid);
+ close(fds[0]);
+
+ kfree(output);
+ return err;
+
+out_close:
+ close(fds[0]);
+ close(fds[1]);
+out:
+ return err;
+}
+
+static int slip_open(void *data)
+{
+ struct slip_data *pri = data;
+ char version_buf[sizeof("nnnnn\0")];
+ char gate_buf[sizeof("nnn.nnn.nnn.nnn\0")];
+ char *argv[] = { "uml_net", version_buf, "slip", "up", gate_buf,
+ NULL };
+ int sfd, mfd, err;
+
+ err = get_pty();
+ if (err < 0) {
+ printk(UM_KERN_ERR "slip-open : Failed to open pty, err = %d\n",
+ -err);
+ goto out;
+ }
+ mfd = err;
+
+ err = open(ptsname(mfd), O_RDWR, 0);
+ if (err < 0) {
+ printk(UM_KERN_ERR "Couldn't open tty for slip line, "
+ "err = %d\n", -err);
+ goto out_close;
+ }
+ sfd = err;
+
+ if (set_up_tty(sfd))
+ goto out_close2;
+
+ pri->slave = sfd;
+ pri->slip.pos = 0;
+ pri->slip.esc = 0;
+ if (pri->gate_addr != NULL) {
+ sprintf(version_buf, "%d", UML_NET_VERSION);
+ strcpy(gate_buf, pri->gate_addr);
+
+ err = slip_tramp(argv, sfd);
+
+ if (err < 0) {
+ printk(UM_KERN_ERR "slip_tramp failed - err = %d\n",
+ -err);
+ goto out_close2;
+ }
+ err = os_get_ifname(pri->slave, pri->name);
+ if (err < 0) {
+ printk(UM_KERN_ERR "get_ifname failed, err = %d\n",
+ -err);
+ goto out_close2;
+ }
+ iter_addresses(pri->dev, open_addr, pri->name);
+ }
+ else {
+ err = os_set_slip(sfd);
+ if (err < 0) {
+ printk(UM_KERN_ERR "Failed to set slip discipline "
+ "encapsulation - err = %d\n", -err);
+ goto out_close2;
+ }
+ }
+ return mfd;
+out_close2:
+ close(sfd);
+out_close:
+ close(mfd);
+out:
+ return err;
+}
+
+static void slip_close(int fd, void *data)
+{
+ struct slip_data *pri = data;
+ char version_buf[sizeof("nnnnn\0")];
+ char *argv[] = { "uml_net", version_buf, "slip", "down", pri->name,
+ NULL };
+ int err;
+
+ if (pri->gate_addr != NULL)
+ iter_addresses(pri->dev, close_addr, pri->name);
+
+ sprintf(version_buf, "%d", UML_NET_VERSION);
+
+ err = slip_tramp(argv, pri->slave);
+
+ if (err != 0)
+ printk(UM_KERN_ERR "slip_tramp failed - errno = %d\n", -err);
+ close(fd);
+ close(pri->slave);
+ pri->slave = -1;
+}
+
+int slip_user_read(int fd, void *buf, int len, struct slip_data *pri)
+{
+ return slip_proto_read(fd, buf, len, &pri->slip);
+}
+
+int slip_user_write(int fd, void *buf, int len, struct slip_data *pri)
+{
+ return slip_proto_write(fd, buf, len, &pri->slip);
+}
+
+static void slip_add_addr(unsigned char *addr, unsigned char *netmask,
+ void *data)
+{
+ struct slip_data *pri = data;
+
+ if (pri->slave < 0)
+ return;
+ open_addr(addr, netmask, pri->name);
+}
+
+static void slip_del_addr(unsigned char *addr, unsigned char *netmask,
+ void *data)
+{
+ struct slip_data *pri = data;
+
+ if (pri->slave < 0)
+ return;
+ close_addr(addr, netmask, pri->name);
+}
+
+const struct net_user_info slip_user_info = {
+ .init = slip_user_init,
+ .open = slip_open,
+ .close = slip_close,
+ .remove = NULL,
+ .add_address = slip_add_addr,
+ .delete_address = slip_del_addr,
+ .mtu = BUF_SIZE,
+ .max_packet = BUF_SIZE,
+};
diff --git a/arch/um/drivers/slirp.h b/arch/um/drivers/slirp.h
new file mode 100644
index 00000000000..89ccf83b757
--- /dev/null
+++ b/arch/um/drivers/slirp.h
@@ -0,0 +1,33 @@
+#ifndef __UM_SLIRP_H
+#define __UM_SLIRP_H
+
+#include "slip_common.h"
+
+#define SLIRP_MAX_ARGS 100
+/*
+ * XXX this next definition is here because I don't understand why this
+ * initializer doesn't work in slirp_kern.c:
+ *
+ * argv : { init->argv[ 0 ... SLIRP_MAX_ARGS-1 ] },
+ *
+ * or why I can't typecast like this:
+ *
+ * argv : (char* [SLIRP_MAX_ARGS])(init->argv),
+ */
+struct arg_list_dummy_wrapper { char *argv[SLIRP_MAX_ARGS]; };
+
+struct slirp_data {
+ void *dev;
+ struct arg_list_dummy_wrapper argw;
+ int pid;
+ int slave;
+ struct slip_proto slip;
+};
+
+extern const struct net_user_info slirp_user_info;
+
+extern int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri);
+extern int slirp_user_write(int fd, void *buf, int len,
+ struct slirp_data *pri);
+
+#endif
diff --git a/arch/um/drivers/slirp_kern.c b/arch/um/drivers/slirp_kern.c
new file mode 100644
index 00000000000..e376284f0fb
--- /dev/null
+++ b/arch/um/drivers/slirp_kern.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL.
+ */
+
+#include <linux/if_arp.h>
+#include "linux/init.h"
+#include <linux/netdevice.h>
+#include <linux/string.h>
+#include "net_kern.h"
+#include "net_user.h"
+#include "slirp.h"
+
+struct slirp_init {
+ struct arg_list_dummy_wrapper argw; /* XXX should be simpler... */
+};
+
+void slirp_init(struct net_device *dev, void *data)
+{
+ struct uml_net_private *private;
+ struct slirp_data *spri;
+ struct slirp_init *init = data;
+ int i;
+
+ private = netdev_priv(dev);
+ spri = (struct slirp_data *) private->user;
+
+ spri->argw = init->argw;
+ spri->pid = -1;
+ spri->slave = -1;
+ spri->dev = dev;
+
+ slip_proto_init(&spri->slip);
+
+ dev->hard_header_len = 0;
+ dev->header_ops = NULL;
+ dev->addr_len = 0;
+ dev->type = ARPHRD_SLIP;
+ dev->tx_queue_len = 256;
+ dev->flags = IFF_NOARP;
+ printk("SLIRP backend - command line:");
+ for (i = 0; spri->argw.argv[i] != NULL; i++)
+ printk(" '%s'",spri->argw.argv[i]);
+ printk("\n");
+}
+
+static unsigned short slirp_protocol(struct sk_buff *skbuff)
+{
+ return htons(ETH_P_IP);
+}
+
+static int slirp_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return slirp_user_read(fd, skb_mac_header(skb), skb->dev->mtu,
+ (struct slirp_data *) &lp->user);
+}
+
+static int slirp_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return slirp_user_write(fd, skb->data, skb->len,
+ (struct slirp_data *) &lp->user);
+}
+
+const struct net_kern_info slirp_kern_info = {
+ .init = slirp_init,
+ .protocol = slirp_protocol,
+ .read = slirp_read,
+ .write = slirp_write,
+};
+
+static int slirp_setup(char *str, char **mac_out, void *data)
+{
+ struct slirp_init *init = data;
+ int i=0;
+
+ *init = ((struct slirp_init) { .argw = { { "slirp", NULL } } });
+
+ str = split_if_spec(str, mac_out, NULL);
+
+ if (str == NULL) /* no command line given after MAC addr */
+ return 1;
+
+ do {
+ if (i >= SLIRP_MAX_ARGS - 1) {
+ printk(KERN_WARNING "slirp_setup: truncating slirp "
+ "arguments\n");
+ break;
+ }
+ init->argw.argv[i++] = str;
+ while(*str && *str!=',') {
+ if (*str == '_')
+ *str=' ';
+ str++;
+ }
+ if (*str != ',')
+ break;
+ *str++ = '\0';
+ } while (1);
+
+ init->argw.argv[i] = NULL;
+ return 1;
+}
+
+static struct transport slirp_transport = {
+ .list = LIST_HEAD_INIT(slirp_transport.list),
+ .name = "slirp",
+ .setup = slirp_setup,
+ .user = &slirp_user_info,
+ .kern = &slirp_kern_info,
+ .private_size = sizeof(struct slirp_data),
+ .setup_size = sizeof(struct slirp_init),
+};
+
+static int register_slirp(void)
+{
+ register_transport(&slirp_transport);
+ return 0;
+}
+
+late_initcall(register_slirp);
diff --git a/arch/um/drivers/slirp_user.c b/arch/um/drivers/slirp_user.c
new file mode 100644
index 00000000000..db4adb639ff
--- /dev/null
+++ b/arch/um/drivers/slirp_user.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL.
+ */
+
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/wait.h>
+#include "net_user.h"
+#include "os.h"
+#include "slirp.h"
+
+static int slirp_user_init(void *data, void *dev)
+{
+ struct slirp_data *pri = data;
+
+ pri->dev = dev;
+ return 0;
+}
+
+struct slirp_pre_exec_data {
+ int stdin;
+ int stdout;
+};
+
+static void slirp_pre_exec(void *arg)
+{
+ struct slirp_pre_exec_data *data = arg;
+
+ if (data->stdin != -1)
+ dup2(data->stdin, 0);
+ if (data->stdout != -1)
+ dup2(data->stdout, 1);
+}
+
+static int slirp_tramp(char **argv, int fd)
+{
+ struct slirp_pre_exec_data pe_data;
+ int pid;
+
+ pe_data.stdin = fd;
+ pe_data.stdout = fd;
+ pid = run_helper(slirp_pre_exec, &pe_data, argv);
+
+ return pid;
+}
+
+static int slirp_open(void *data)
+{
+ struct slirp_data *pri = data;
+ int fds[2], pid, err;
+
+ err = os_pipe(fds, 1, 1);
+ if (err)
+ return err;
+
+ err = slirp_tramp(pri->argw.argv, fds[1]);
+ if (err < 0) {
+ printk(UM_KERN_ERR "slirp_tramp failed - errno = %d\n", -err);
+ goto out;
+ }
+ pid = err;
+
+ pri->slave = fds[1];
+ pri->slip.pos = 0;
+ pri->slip.esc = 0;
+ pri->pid = err;
+
+ return fds[0];
+out:
+ close(fds[0]);
+ close(fds[1]);
+ return err;
+}
+
+static void slirp_close(int fd, void *data)
+{
+ struct slirp_data *pri = data;
+ int err;
+
+ close(fd);
+ close(pri->slave);
+
+ pri->slave = -1;
+
+ if (pri->pid<1) {
+ printk(UM_KERN_ERR "slirp_close: no child process to shut "
+ "down\n");
+ return;
+ }
+
+#if 0
+ if (kill(pri->pid, SIGHUP)<0) {
+ printk(UM_KERN_ERR "slirp_close: sending hangup to %d failed "
+ "(%d)\n", pri->pid, errno);
+ }
+#endif
+ err = helper_wait(pri->pid);
+ if (err < 0)
+ return;
+
+ pri->pid = -1;
+}
+
+int slirp_user_read(int fd, void *buf, int len, struct slirp_data *pri)
+{
+ return slip_proto_read(fd, buf, len, &pri->slip);
+}
+
+int slirp_user_write(int fd, void *buf, int len, struct slirp_data *pri)
+{
+ return slip_proto_write(fd, buf, len, &pri->slip);
+}
+
+const struct net_user_info slirp_user_info = {
+ .init = slirp_user_init,
+ .open = slirp_open,
+ .close = slirp_close,
+ .remove = NULL,
+ .add_address = NULL,
+ .delete_address = NULL,
+ .mtu = BUF_SIZE,
+ .max_packet = BUF_SIZE,
+};
diff --git a/arch/um/drivers/ssl.c b/arch/um/drivers/ssl.c
new file mode 100644
index 00000000000..9d8c20af6f8
--- /dev/null
+++ b/arch/um/drivers/ssl.c
@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) 2000, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/fs.h"
+#include "linux/tty.h"
+#include "linux/tty_driver.h"
+#include "linux/major.h"
+#include "linux/mm.h"
+#include "linux/init.h"
+#include "linux/console.h"
+#include "asm/termbits.h"
+#include "asm/irq.h"
+#include "ssl.h"
+#include "chan.h"
+#include "init.h"
+#include "irq_user.h"
+#include "mconsole_kern.h"
+
+static const int ssl_version = 1;
+
+/* Referenced only by tty_driver below - presumably it's locked correctly
+ * by the tty driver.
+ */
+
+static struct tty_driver *ssl_driver;
+
+#define NR_PORTS 64
+
+static void ssl_announce(char *dev_name, int dev)
+{
+ printk(KERN_INFO "Serial line %d assigned device '%s'\n", dev,
+ dev_name);
+}
+
+/* Almost const, except that xterm_title may be changed in an initcall */
+static struct chan_opts opts = {
+ .announce = ssl_announce,
+ .xterm_title = "Serial Line #%d",
+ .raw = 1,
+};
+
+static int ssl_config(char *str, char **error_out);
+static int ssl_get_config(char *dev, char *str, int size, char **error_out);
+static int ssl_remove(int n, char **error_out);
+
+
+/* Const, except for .mc.list */
+static struct line_driver driver = {
+ .name = "UML serial line",
+ .device_name = "ttyS",
+ .major = TTY_MAJOR,
+ .minor_start = 64,
+ .type = TTY_DRIVER_TYPE_SERIAL,
+ .subtype = 0,
+ .read_irq = SSL_IRQ,
+ .read_irq_name = "ssl",
+ .write_irq = SSL_WRITE_IRQ,
+ .write_irq_name = "ssl-write",
+ .mc = {
+ .list = LIST_HEAD_INIT(driver.mc.list),
+ .name = "ssl",
+ .config = ssl_config,
+ .get_config = ssl_get_config,
+ .id = line_id,
+ .remove = ssl_remove,
+ },
+};
+
+/* The array is initialized by line_init, at initcall time. The
+ * elements are locked individually as needed.
+ */
+static struct line serial_lines[NR_PORTS] =
+ { [0 ... NR_PORTS - 1] = LINE_INIT(CONFIG_SSL_CHAN, &driver) };
+
+static int ssl_config(char *str, char **error_out)
+{
+ return line_config(serial_lines, ARRAY_SIZE(serial_lines), str, &opts,
+ error_out);
+}
+
+static int ssl_get_config(char *dev, char *str, int size, char **error_out)
+{
+ return line_get_config(dev, serial_lines, ARRAY_SIZE(serial_lines), str,
+ size, error_out);
+}
+
+static int ssl_remove(int n, char **error_out)
+{
+ return line_remove(serial_lines, ARRAY_SIZE(serial_lines), n,
+ error_out);
+}
+
+static int ssl_open(struct tty_struct *tty, struct file *filp)
+{
+ int err = line_open(serial_lines, tty);
+
+ if (err)
+ printk(KERN_ERR "Failed to open serial line %d, err = %d\n",
+ tty->index, err);
+
+ return err;
+}
+
+#if 0
+static void ssl_flush_buffer(struct tty_struct *tty)
+{
+ return;
+}
+
+static void ssl_stop(struct tty_struct *tty)
+{
+ printk(KERN_ERR "Someone should implement ssl_stop\n");
+}
+
+static void ssl_start(struct tty_struct *tty)
+{
+ printk(KERN_ERR "Someone should implement ssl_start\n");
+}
+
+void ssl_hangup(struct tty_struct *tty)
+{
+}
+#endif
+
+static const struct tty_operations ssl_ops = {
+ .open = ssl_open,
+ .close = line_close,
+ .write = line_write,
+ .put_char = line_put_char,
+ .write_room = line_write_room,
+ .chars_in_buffer = line_chars_in_buffer,
+ .flush_buffer = line_flush_buffer,
+ .flush_chars = line_flush_chars,
+ .set_termios = line_set_termios,
+ .ioctl = line_ioctl,
+ .throttle = line_throttle,
+ .unthrottle = line_unthrottle,
+#if 0
+ .stop = ssl_stop,
+ .start = ssl_start,
+ .hangup = ssl_hangup,
+#endif
+};
+
+/* Changed by ssl_init and referenced by ssl_exit, which are both serialized
+ * by being an initcall and exitcall, respectively.
+ */
+static int ssl_init_done = 0;
+
+static void ssl_console_write(struct console *c, const char *string,
+ unsigned len)
+{
+ struct line *line = &serial_lines[c->index];
+ unsigned long flags;
+
+ spin_lock_irqsave(&line->lock, flags);
+ console_write_chan(&line->chan_list, string, len);
+ spin_unlock_irqrestore(&line->lock, flags);
+}
+
+static struct tty_driver *ssl_console_device(struct console *c, int *index)
+{
+ *index = c->index;
+ return ssl_driver;
+}
+
+static int ssl_console_setup(struct console *co, char *options)
+{
+ struct line *line = &serial_lines[co->index];
+
+ return console_open_chan(line, co);
+}
+
+/* No locking for register_console call - relies on single-threaded initcalls */
+static struct console ssl_cons = {
+ .name = "ttyS",
+ .write = ssl_console_write,
+ .device = ssl_console_device,
+ .setup = ssl_console_setup,
+ .flags = CON_PRINTBUFFER|CON_ANYTIME,
+ .index = -1,
+};
+
+static int ssl_init(void)
+{
+ char *new_title;
+
+ printk(KERN_INFO "Initializing software serial port version %d\n",
+ ssl_version);
+ ssl_driver = register_lines(&driver, &ssl_ops, serial_lines,
+ ARRAY_SIZE(serial_lines));
+
+ new_title = add_xterm_umid(opts.xterm_title);
+ if (new_title != NULL)
+ opts.xterm_title = new_title;
+
+ lines_init(serial_lines, ARRAY_SIZE(serial_lines), &opts);
+
+ ssl_init_done = 1;
+ register_console(&ssl_cons);
+ return 0;
+}
+late_initcall(ssl_init);
+
+static void ssl_exit(void)
+{
+ if (!ssl_init_done)
+ return;
+ close_lines(serial_lines, ARRAY_SIZE(serial_lines));
+}
+__uml_exitcall(ssl_exit);
+
+static int ssl_chan_setup(char *str)
+{
+ char *error;
+ int ret;
+
+ ret = line_setup(serial_lines, ARRAY_SIZE(serial_lines), str, &error);
+ if(ret < 0)
+ printk(KERN_ERR "Failed to set up serial line with "
+ "configuration string \"%s\" : %s\n", str, error);
+
+ return 1;
+}
+
+__setup("ssl", ssl_chan_setup);
+__channel_help(ssl_chan_setup, "ssl");
diff --git a/arch/um/drivers/ssl.h b/arch/um/drivers/ssl.h
new file mode 100644
index 00000000000..314d17725ce
--- /dev/null
+++ b/arch/um/drivers/ssl.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SSL_H__
+#define __SSL_H__
+
+extern int ssl_read(int fd, int line);
+extern void ssl_receive_char(int line, char ch);
+
+#endif
+
diff --git a/arch/um/drivers/stderr_console.c b/arch/um/drivers/stderr_console.c
new file mode 100644
index 00000000000..d07a97f8b99
--- /dev/null
+++ b/arch/um/drivers/stderr_console.c
@@ -0,0 +1,62 @@
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/console.h>
+
+#include "chan_user.h"
+
+/* ----------------------------------------------------------------------------- */
+/* trivial console driver -- simply dump everything to stderr */
+
+/*
+ * Don't register by default -- as this registers very early in the
+ * boot process it becomes the default console.
+ *
+ * Initialized at init time.
+ */
+static int use_stderr_console = 0;
+
+static void stderr_console_write(struct console *console, const char *string,
+ unsigned len)
+{
+ generic_write(2 /* stderr */, string, len, NULL);
+}
+
+static struct console stderr_console = {
+ .name = "stderr",
+ .write = stderr_console_write,
+ .flags = CON_PRINTBUFFER,
+};
+
+static int __init stderr_console_init(void)
+{
+ if (use_stderr_console)
+ register_console(&stderr_console);
+ return 0;
+}
+console_initcall(stderr_console_init);
+
+static int stderr_setup(char *str)
+{
+ if (!str)
+ return 0;
+ use_stderr_console = simple_strtoul(str,&str,0);
+ return 1;
+}
+__setup("stderr=", stderr_setup);
+
+/* The previous behavior of not unregistering led to /dev/console being
+ * impossible to open. My FC5 filesystem started having init die, and the
+ * system panicing because of this. Unregistering causes the real
+ * console to become the default console, and /dev/console can then be
+ * opened. Making this an initcall makes this happen late enough that
+ * there is no added value in dumping everything to stderr, and the
+ * normal console is good enough to show you all available output.
+ */
+static int __init unregister_stderr(void)
+{
+ unregister_console(&stderr_console);
+
+ return 0;
+}
+
+__initcall(unregister_stderr);
diff --git a/arch/um/drivers/stdio_console.c b/arch/um/drivers/stdio_console.c
new file mode 100644
index 00000000000..088776f0190
--- /dev/null
+++ b/arch/um/drivers/stdio_console.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/posix_types.h"
+#include "linux/tty.h"
+#include "linux/tty_flip.h"
+#include "linux/types.h"
+#include "linux/major.h"
+#include "linux/kdev_t.h"
+#include "linux/console.h"
+#include "linux/string.h"
+#include "linux/sched.h"
+#include "linux/list.h"
+#include "linux/init.h"
+#include "linux/interrupt.h"
+#include "linux/slab.h"
+#include "linux/hardirq.h"
+#include "asm/current.h"
+#include "asm/irq.h"
+#include "stdio_console.h"
+#include "chan.h"
+#include "irq_user.h"
+#include "mconsole_kern.h"
+#include "init.h"
+
+#define MAX_TTYS (16)
+
+/* Referenced only by tty_driver below - presumably it's locked correctly
+ * by the tty driver.
+ */
+
+static struct tty_driver *console_driver;
+
+static void stdio_announce(char *dev_name, int dev)
+{
+ printk(KERN_INFO "Virtual console %d assigned device '%s'\n", dev,
+ dev_name);
+}
+
+/* Almost const, except that xterm_title may be changed in an initcall */
+static struct chan_opts opts = {
+ .announce = stdio_announce,
+ .xterm_title = "Virtual Console #%d",
+ .raw = 1,
+};
+
+static int con_config(char *str, char **error_out);
+static int con_get_config(char *dev, char *str, int size, char **error_out);
+static int con_remove(int n, char **con_remove);
+
+
+/* Const, except for .mc.list */
+static struct line_driver driver = {
+ .name = "UML console",
+ .device_name = "tty",
+ .major = TTY_MAJOR,
+ .minor_start = 0,
+ .type = TTY_DRIVER_TYPE_CONSOLE,
+ .subtype = SYSTEM_TYPE_CONSOLE,
+ .read_irq = CONSOLE_IRQ,
+ .read_irq_name = "console",
+ .write_irq = CONSOLE_WRITE_IRQ,
+ .write_irq_name = "console-write",
+ .mc = {
+ .list = LIST_HEAD_INIT(driver.mc.list),
+ .name = "con",
+ .config = con_config,
+ .get_config = con_get_config,
+ .id = line_id,
+ .remove = con_remove,
+ },
+};
+
+/* The array is initialized by line_init, at initcall time. The
+ * elements are locked individually as needed.
+ */
+static struct line vts[MAX_TTYS] = { LINE_INIT(CONFIG_CON_ZERO_CHAN, &driver),
+ [ 1 ... MAX_TTYS - 1 ] =
+ LINE_INIT(CONFIG_CON_CHAN, &driver) };
+
+static int con_config(char *str, char **error_out)
+{
+ return line_config(vts, ARRAY_SIZE(vts), str, &opts, error_out);
+}
+
+static int con_get_config(char *dev, char *str, int size, char **error_out)
+{
+ return line_get_config(dev, vts, ARRAY_SIZE(vts), str, size, error_out);
+}
+
+static int con_remove(int n, char **error_out)
+{
+ return line_remove(vts, ARRAY_SIZE(vts), n, error_out);
+}
+
+static int con_open(struct tty_struct *tty, struct file *filp)
+{
+ int err = line_open(vts, tty);
+ if (err)
+ printk(KERN_ERR "Failed to open console %d, err = %d\n",
+ tty->index, err);
+
+ return err;
+}
+
+/* Set in an initcall, checked in an exitcall */
+static int con_init_done = 0;
+
+static const struct tty_operations console_ops = {
+ .open = con_open,
+ .close = line_close,
+ .write = line_write,
+ .put_char = line_put_char,
+ .write_room = line_write_room,
+ .chars_in_buffer = line_chars_in_buffer,
+ .flush_buffer = line_flush_buffer,
+ .flush_chars = line_flush_chars,
+ .set_termios = line_set_termios,
+ .ioctl = line_ioctl,
+ .throttle = line_throttle,
+ .unthrottle = line_unthrottle,
+};
+
+static void uml_console_write(struct console *console, const char *string,
+ unsigned len)
+{
+ struct line *line = &vts[console->index];
+ unsigned long flags;
+
+ spin_lock_irqsave(&line->lock, flags);
+ console_write_chan(&line->chan_list, string, len);
+ spin_unlock_irqrestore(&line->lock, flags);
+}
+
+static struct tty_driver *uml_console_device(struct console *c, int *index)
+{
+ *index = c->index;
+ return console_driver;
+}
+
+static int uml_console_setup(struct console *co, char *options)
+{
+ struct line *line = &vts[co->index];
+
+ return console_open_chan(line, co);
+}
+
+/* No locking for register_console call - relies on single-threaded initcalls */
+static struct console stdiocons = {
+ .name = "tty",
+ .write = uml_console_write,
+ .device = uml_console_device,
+ .setup = uml_console_setup,
+ .flags = CON_PRINTBUFFER|CON_ANYTIME,
+ .index = -1,
+};
+
+static int stdio_init(void)
+{
+ char *new_title;
+
+ console_driver = register_lines(&driver, &console_ops, vts,
+ ARRAY_SIZE(vts));
+ if (console_driver == NULL)
+ return -1;
+ printk(KERN_INFO "Initialized stdio console driver\n");
+
+ new_title = add_xterm_umid(opts.xterm_title);
+ if(new_title != NULL)
+ opts.xterm_title = new_title;
+
+ lines_init(vts, ARRAY_SIZE(vts), &opts);
+
+ con_init_done = 1;
+ register_console(&stdiocons);
+ return 0;
+}
+late_initcall(stdio_init);
+
+static void console_exit(void)
+{
+ if (!con_init_done)
+ return;
+ close_lines(vts, ARRAY_SIZE(vts));
+}
+__uml_exitcall(console_exit);
+
+static int console_chan_setup(char *str)
+{
+ char *error;
+ int ret;
+
+ ret = line_setup(vts, ARRAY_SIZE(vts), str, &error);
+ if(ret < 0)
+ printk(KERN_ERR "Failed to set up console with "
+ "configuration string \"%s\" : %s\n", str, error);
+
+ return 1;
+}
+__setup("con", console_chan_setup);
+__channel_help(console_chan_setup, "con");
diff --git a/arch/um/drivers/stdio_console.h b/arch/um/drivers/stdio_console.h
new file mode 100644
index 00000000000..6d8275f71fd
--- /dev/null
+++ b/arch/um/drivers/stdio_console.h
@@ -0,0 +1,11 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __STDIO_CONSOLE_H
+#define __STDIO_CONSOLE_H
+
+extern void save_console_flags(void);
+#endif
+
diff --git a/arch/um/drivers/tty.c b/arch/um/drivers/tty.c
new file mode 100644
index 00000000000..a97391f9ec5
--- /dev/null
+++ b/arch/um/drivers/tty.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
+ * Licensed under the GPL
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <termios.h>
+#include "chan_user.h"
+#include "os.h"
+#include "um_malloc.h"
+
+struct tty_chan {
+ char *dev;
+ int raw;
+ struct termios tt;
+};
+
+static void *tty_chan_init(char *str, int device, const struct chan_opts *opts)
+{
+ struct tty_chan *data;
+
+ if (*str != ':') {
+ printk(UM_KERN_ERR "tty_init : channel type 'tty' must specify "
+ "a device\n");
+ return NULL;
+ }
+ str++;
+
+ data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
+ if (data == NULL)
+ return NULL;
+ *data = ((struct tty_chan) { .dev = str,
+ .raw = opts->raw });
+
+ return data;
+}
+
+static int tty_open(int input, int output, int primary, void *d,
+ char **dev_out)
+{
+ struct tty_chan *data = d;
+ int fd, err, mode = 0;
+
+ if (input && output)
+ mode = O_RDWR;
+ else if (input)
+ mode = O_RDONLY;
+ else if (output)
+ mode = O_WRONLY;
+
+ fd = open(data->dev, mode);
+ if (fd < 0)
+ return -errno;
+
+ if (data->raw) {
+ CATCH_EINTR(err = tcgetattr(fd, &data->tt));
+ if (err)
+ return err;
+
+ err = raw(fd);
+ if (err)
+ return err;
+ }
+
+ *dev_out = data->dev;
+ return fd;
+}
+
+const struct chan_ops tty_ops = {
+ .type = "tty",
+ .init = tty_chan_init,
+ .open = tty_open,
+ .close = generic_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = generic_free,
+ .winch = 0,
+};
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c
new file mode 100644
index 00000000000..944453a3ec9
--- /dev/null
+++ b/arch/um/drivers/ubd_kern.c
@@ -0,0 +1,1473 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+/* 2001-09-28...2002-04-17
+ * Partition stuff by James_McMechan@hotmail.com
+ * old style ubd by setting UBD_SHIFT to 0
+ * 2002-09-27...2002-10-18 massive tinkering for 2.5
+ * partitions have changed in 2.5
+ * 2003-01-29 more tinkering for 2.5.59-1
+ * This should now address the sysfs problems and has
+ * the symlink for devfs to allow for booting with
+ * the common /dev/ubd/discX/... names rather than
+ * only /dev/ubdN/discN this version also has lots of
+ * clean ups preparing for ubd-many.
+ * James McMechan
+ */
+
+#define UBD_SHIFT 4
+
+#include "linux/kernel.h"
+#include "linux/module.h"
+#include "linux/blkdev.h"
+#include "linux/ata.h"
+#include "linux/hdreg.h"
+#include "linux/init.h"
+#include "linux/cdrom.h"
+#include "linux/proc_fs.h"
+#include "linux/seq_file.h"
+#include "linux/ctype.h"
+#include "linux/capability.h"
+#include "linux/mm.h"
+#include "linux/slab.h"
+#include "linux/vmalloc.h"
+#include "linux/mutex.h"
+#include "linux/blkpg.h"
+#include "linux/genhd.h"
+#include "linux/spinlock.h"
+#include "linux/platform_device.h"
+#include "linux/scatterlist.h"
+#include "asm/segment.h"
+#include "asm/uaccess.h"
+#include "asm/irq.h"
+#include "asm/types.h"
+#include "asm/tlbflush.h"
+#include "mem_user.h"
+#include "kern_util.h"
+#include "mconsole_kern.h"
+#include "init.h"
+#include "irq_user.h"
+#include "irq_kern.h"
+#include "ubd_user.h"
+#include "os.h"
+#include "mem.h"
+#include "cow.h"
+
+enum ubd_req { UBD_READ, UBD_WRITE };
+
+struct io_thread_req {
+ struct request *req;
+ enum ubd_req op;
+ int fds[2];
+ unsigned long offsets[2];
+ unsigned long long offset;
+ unsigned long length;
+ char *buffer;
+ int sectorsize;
+ unsigned long sector_mask;
+ unsigned long long cow_offset;
+ unsigned long bitmap_words[2];
+ int error;
+};
+
+static inline int ubd_test_bit(__u64 bit, unsigned char *data)
+{
+ __u64 n;
+ int bits, off;
+
+ bits = sizeof(data[0]) * 8;
+ n = bit / bits;
+ off = bit % bits;
+ return (data[n] & (1 << off)) != 0;
+}
+
+static inline void ubd_set_bit(__u64 bit, unsigned char *data)
+{
+ __u64 n;
+ int bits, off;
+
+ bits = sizeof(data[0]) * 8;
+ n = bit / bits;
+ off = bit % bits;
+ data[n] |= (1 << off);
+}
+/*End stuff from ubd_user.h*/
+
+#define DRIVER_NAME "uml-blkdev"
+
+static DEFINE_MUTEX(ubd_lock);
+static DEFINE_MUTEX(ubd_mutex); /* replaces BKL, might not be needed */
+
+static int ubd_open(struct block_device *bdev, fmode_t mode);
+static int ubd_release(struct gendisk *disk, fmode_t mode);
+static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg);
+static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo);
+
+#define MAX_DEV (16)
+
+static const struct block_device_operations ubd_blops = {
+ .owner = THIS_MODULE,
+ .open = ubd_open,
+ .release = ubd_release,
+ .ioctl = ubd_ioctl,
+ .getgeo = ubd_getgeo,
+};
+
+/* Protected by ubd_lock */
+static int fake_major = UBD_MAJOR;
+static struct gendisk *ubd_gendisk[MAX_DEV];
+static struct gendisk *fake_gendisk[MAX_DEV];
+
+#ifdef CONFIG_BLK_DEV_UBD_SYNC
+#define OPEN_FLAGS ((struct openflags) { .r = 1, .w = 1, .s = 1, .c = 0, \
+ .cl = 1 })
+#else
+#define OPEN_FLAGS ((struct openflags) { .r = 1, .w = 1, .s = 0, .c = 0, \
+ .cl = 1 })
+#endif
+static struct openflags global_openflags = OPEN_FLAGS;
+
+struct cow {
+ /* backing file name */
+ char *file;
+ /* backing file fd */
+ int fd;
+ unsigned long *bitmap;
+ unsigned long bitmap_len;
+ int bitmap_offset;
+ int data_offset;
+};
+
+#define MAX_SG 64
+
+struct ubd {
+ struct list_head restart;
+ /* name (and fd, below) of the file opened for writing, either the
+ * backing or the cow file. */
+ char *file;
+ int count;
+ int fd;
+ __u64 size;
+ struct openflags boot_openflags;
+ struct openflags openflags;
+ unsigned shared:1;
+ unsigned no_cow:1;
+ struct cow cow;
+ struct platform_device pdev;
+ struct request_queue *queue;
+ spinlock_t lock;
+ struct scatterlist sg[MAX_SG];
+ struct request *request;
+ int start_sg, end_sg;
+ sector_t rq_pos;
+};
+
+#define DEFAULT_COW { \
+ .file = NULL, \
+ .fd = -1, \
+ .bitmap = NULL, \
+ .bitmap_offset = 0, \
+ .data_offset = 0, \
+}
+
+#define DEFAULT_UBD { \
+ .file = NULL, \
+ .count = 0, \
+ .fd = -1, \
+ .size = -1, \
+ .boot_openflags = OPEN_FLAGS, \
+ .openflags = OPEN_FLAGS, \
+ .no_cow = 0, \
+ .shared = 0, \
+ .cow = DEFAULT_COW, \
+ .lock = __SPIN_LOCK_UNLOCKED(ubd_devs.lock), \
+ .request = NULL, \
+ .start_sg = 0, \
+ .end_sg = 0, \
+ .rq_pos = 0, \
+}
+
+/* Protected by ubd_lock */
+static struct ubd ubd_devs[MAX_DEV] = { [0 ... MAX_DEV - 1] = DEFAULT_UBD };
+
+/* Only changed by fake_ide_setup which is a setup */
+static int fake_ide = 0;
+static struct proc_dir_entry *proc_ide_root = NULL;
+static struct proc_dir_entry *proc_ide = NULL;
+
+static void make_proc_ide(void)
+{
+ proc_ide_root = proc_mkdir("ide", NULL);
+ proc_ide = proc_mkdir("ide0", proc_ide_root);
+}
+
+static int fake_ide_media_proc_show(struct seq_file *m, void *v)
+{
+ seq_puts(m, "disk\n");
+ return 0;
+}
+
+static int fake_ide_media_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, fake_ide_media_proc_show, NULL);
+}
+
+static const struct file_operations fake_ide_media_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = fake_ide_media_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static void make_ide_entries(const char *dev_name)
+{
+ struct proc_dir_entry *dir, *ent;
+ char name[64];
+
+ if(proc_ide_root == NULL) make_proc_ide();
+
+ dir = proc_mkdir(dev_name, proc_ide);
+ if(!dir) return;
+
+ ent = proc_create("media", S_IRUGO, dir, &fake_ide_media_proc_fops);
+ if(!ent) return;
+ snprintf(name, sizeof(name), "ide0/%s", dev_name);
+ proc_symlink(dev_name, proc_ide_root, name);
+}
+
+static int fake_ide_setup(char *str)
+{
+ fake_ide = 1;
+ return 1;
+}
+
+__setup("fake_ide", fake_ide_setup);
+
+__uml_help(fake_ide_setup,
+"fake_ide\n"
+" Create ide0 entries that map onto ubd devices.\n\n"
+);
+
+static int parse_unit(char **ptr)
+{
+ char *str = *ptr, *end;
+ int n = -1;
+
+ if(isdigit(*str)) {
+ n = simple_strtoul(str, &end, 0);
+ if(end == str)
+ return -1;
+ *ptr = end;
+ }
+ else if (('a' <= *str) && (*str <= 'z')) {
+ n = *str - 'a';
+ str++;
+ *ptr = str;
+ }
+ return n;
+}
+
+/* If *index_out == -1 at exit, the passed option was a general one;
+ * otherwise, the str pointer is used (and owned) inside ubd_devs array, so it
+ * should not be freed on exit.
+ */
+static int ubd_setup_common(char *str, int *index_out, char **error_out)
+{
+ struct ubd *ubd_dev;
+ struct openflags flags = global_openflags;
+ char *backing_file;
+ int n, err = 0, i;
+
+ if(index_out) *index_out = -1;
+ n = *str;
+ if(n == '='){
+ char *end;
+ int major;
+
+ str++;
+ if(!strcmp(str, "sync")){
+ global_openflags = of_sync(global_openflags);
+ goto out1;
+ }
+
+ err = -EINVAL;
+ major = simple_strtoul(str, &end, 0);
+ if((*end != '\0') || (end == str)){
+ *error_out = "Didn't parse major number";
+ goto out1;
+ }
+
+ mutex_lock(&ubd_lock);
+ if (fake_major != UBD_MAJOR) {
+ *error_out = "Can't assign a fake major twice";
+ goto out1;
+ }
+
+ fake_major = major;
+
+ printk(KERN_INFO "Setting extra ubd major number to %d\n",
+ major);
+ err = 0;
+ out1:
+ mutex_unlock(&ubd_lock);
+ return err;
+ }
+
+ n = parse_unit(&str);
+ if(n < 0){
+ *error_out = "Couldn't parse device number";
+ return -EINVAL;
+ }
+ if(n >= MAX_DEV){
+ *error_out = "Device number out of range";
+ return 1;
+ }
+
+ err = -EBUSY;
+ mutex_lock(&ubd_lock);
+
+ ubd_dev = &ubd_devs[n];
+ if(ubd_dev->file != NULL){
+ *error_out = "Device is already configured";
+ goto out;
+ }
+
+ if (index_out)
+ *index_out = n;
+
+ err = -EINVAL;
+ for (i = 0; i < sizeof("rscd="); i++) {
+ switch (*str) {
+ case 'r':
+ flags.w = 0;
+ break;
+ case 's':
+ flags.s = 1;
+ break;
+ case 'd':
+ ubd_dev->no_cow = 1;
+ break;
+ case 'c':
+ ubd_dev->shared = 1;
+ break;
+ case '=':
+ str++;
+ goto break_loop;
+ default:
+ *error_out = "Expected '=' or flag letter "
+ "(r, s, c, or d)";
+ goto out;
+ }
+ str++;
+ }
+
+ if (*str == '=')
+ *error_out = "Too many flags specified";
+ else
+ *error_out = "Missing '='";
+ goto out;
+
+break_loop:
+ backing_file = strchr(str, ',');
+
+ if (backing_file == NULL)
+ backing_file = strchr(str, ':');
+
+ if(backing_file != NULL){
+ if(ubd_dev->no_cow){
+ *error_out = "Can't specify both 'd' and a cow file";
+ goto out;
+ }
+ else {
+ *backing_file = '\0';
+ backing_file++;
+ }
+ }
+ err = 0;
+ ubd_dev->file = str;
+ ubd_dev->cow.file = backing_file;
+ ubd_dev->boot_openflags = flags;
+out:
+ mutex_unlock(&ubd_lock);
+ return err;
+}
+
+static int ubd_setup(char *str)
+{
+ char *error;
+ int err;
+
+ err = ubd_setup_common(str, NULL, &error);
+ if(err)
+ printk(KERN_ERR "Failed to initialize device with \"%s\" : "
+ "%s\n", str, error);
+ return 1;
+}
+
+__setup("ubd", ubd_setup);
+__uml_help(ubd_setup,
+"ubd<n><flags>=<filename>[(:|,)<filename2>]\n"
+" This is used to associate a device with a file in the underlying\n"
+" filesystem. When specifying two filenames, the first one is the\n"
+" COW name and the second is the backing file name. As separator you can\n"
+" use either a ':' or a ',': the first one allows writing things like;\n"
+" ubd0=~/Uml/root_cow:~/Uml/root_backing_file\n"
+" while with a ',' the shell would not expand the 2nd '~'.\n"
+" When using only one filename, UML will detect whether to treat it like\n"
+" a COW file or a backing file. To override this detection, add the 'd'\n"
+" flag:\n"
+" ubd0d=BackingFile\n"
+" Usually, there is a filesystem in the file, but \n"
+" that's not required. Swap devices containing swap files can be\n"
+" specified like this. Also, a file which doesn't contain a\n"
+" filesystem can have its contents read in the virtual \n"
+" machine by running 'dd' on the device. <n> must be in the range\n"
+" 0 to 7. Appending an 'r' to the number will cause that device\n"
+" to be mounted read-only. For example ubd1r=./ext_fs. Appending\n"
+" an 's' will cause data to be written to disk on the host immediately.\n"
+" 'c' will cause the device to be treated as being shared between multiple\n"
+" UMLs and file locking will be turned off - this is appropriate for a\n"
+" cluster filesystem and inappropriate at almost all other times.\n\n"
+);
+
+static int udb_setup(char *str)
+{
+ printk("udb%s specified on command line is almost certainly a ubd -> "
+ "udb TYPO\n", str);
+ return 1;
+}
+
+__setup("udb", udb_setup);
+__uml_help(udb_setup,
+"udb\n"
+" This option is here solely to catch ubd -> udb typos, which can be\n"
+" to impossible to catch visually unless you specifically look for\n"
+" them. The only result of any option starting with 'udb' is an error\n"
+" in the boot output.\n\n"
+);
+
+static void do_ubd_request(struct request_queue * q);
+
+/* Only changed by ubd_init, which is an initcall. */
+static int thread_fd = -1;
+static LIST_HEAD(restart);
+
+/* XXX - move this inside ubd_intr. */
+/* Called without dev->lock held, and only in interrupt context. */
+static void ubd_handler(void)
+{
+ struct io_thread_req *req;
+ struct ubd *ubd;
+ struct list_head *list, *next_ele;
+ unsigned long flags;
+ int n;
+
+ while(1){
+ n = os_read_file(thread_fd, &req,
+ sizeof(struct io_thread_req *));
+ if(n != sizeof(req)){
+ if(n == -EAGAIN)
+ break;
+ printk(KERN_ERR "spurious interrupt in ubd_handler, "
+ "err = %d\n", -n);
+ return;
+ }
+
+ blk_end_request(req->req, 0, req->length);
+ kfree(req);
+ }
+ reactivate_fd(thread_fd, UBD_IRQ);
+
+ list_for_each_safe(list, next_ele, &restart){
+ ubd = container_of(list, struct ubd, restart);
+ list_del_init(&ubd->restart);
+ spin_lock_irqsave(&ubd->lock, flags);
+ do_ubd_request(ubd->queue);
+ spin_unlock_irqrestore(&ubd->lock, flags);
+ }
+}
+
+static irqreturn_t ubd_intr(int irq, void *dev)
+{
+ ubd_handler();
+ return IRQ_HANDLED;
+}
+
+/* Only changed by ubd_init, which is an initcall. */
+static int io_pid = -1;
+
+static void kill_io_thread(void)
+{
+ if(io_pid != -1)
+ os_kill_process(io_pid, 1);
+}
+
+__uml_exitcall(kill_io_thread);
+
+static inline int ubd_file_size(struct ubd *ubd_dev, __u64 *size_out)
+{
+ char *file;
+ int fd;
+ int err;
+
+ __u32 version;
+ __u32 align;
+ char *backing_file;
+ time_t mtime;
+ unsigned long long size;
+ int sector_size;
+ int bitmap_offset;
+
+ if (ubd_dev->file && ubd_dev->cow.file) {
+ file = ubd_dev->cow.file;
+
+ goto out;
+ }
+
+ fd = os_open_file(ubd_dev->file, global_openflags, 0);
+ if (fd < 0)
+ return fd;
+
+ err = read_cow_header(file_reader, &fd, &version, &backing_file, \
+ &mtime, &size, &sector_size, &align, &bitmap_offset);
+ os_close_file(fd);
+
+ if(err == -EINVAL)
+ file = ubd_dev->file;
+ else
+ file = backing_file;
+
+out:
+ return os_file_size(file, size_out);
+}
+
+static int read_cow_bitmap(int fd, void *buf, int offset, int len)
+{
+ int err;
+
+ err = os_seek_file(fd, offset);
+ if (err < 0)
+ return err;
+
+ err = os_read_file(fd, buf, len);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int backing_file_mismatch(char *file, __u64 size, time_t mtime)
+{
+ unsigned long modtime;
+ unsigned long long actual;
+ int err;
+
+ err = os_file_modtime(file, &modtime);
+ if (err < 0) {
+ printk(KERN_ERR "Failed to get modification time of backing "
+ "file \"%s\", err = %d\n", file, -err);
+ return err;
+ }
+
+ err = os_file_size(file, &actual);
+ if (err < 0) {
+ printk(KERN_ERR "Failed to get size of backing file \"%s\", "
+ "err = %d\n", file, -err);
+ return err;
+ }
+
+ if (actual != size) {
+ /*__u64 can be a long on AMD64 and with %lu GCC complains; so
+ * the typecast.*/
+ printk(KERN_ERR "Size mismatch (%llu vs %llu) of COW header "
+ "vs backing file\n", (unsigned long long) size, actual);
+ return -EINVAL;
+ }
+ if (modtime != mtime) {
+ printk(KERN_ERR "mtime mismatch (%ld vs %ld) of COW header vs "
+ "backing file\n", mtime, modtime);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static int path_requires_switch(char *from_cmdline, char *from_cow, char *cow)
+{
+ struct uml_stat buf1, buf2;
+ int err;
+
+ if (from_cmdline == NULL)
+ return 0;
+ if (!strcmp(from_cmdline, from_cow))
+ return 0;
+
+ err = os_stat_file(from_cmdline, &buf1);
+ if (err < 0) {
+ printk(KERN_ERR "Couldn't stat '%s', err = %d\n", from_cmdline,
+ -err);
+ return 0;
+ }
+ err = os_stat_file(from_cow, &buf2);
+ if (err < 0) {
+ printk(KERN_ERR "Couldn't stat '%s', err = %d\n", from_cow,
+ -err);
+ return 1;
+ }
+ if ((buf1.ust_dev == buf2.ust_dev) && (buf1.ust_ino == buf2.ust_ino))
+ return 0;
+
+ printk(KERN_ERR "Backing file mismatch - \"%s\" requested, "
+ "\"%s\" specified in COW header of \"%s\"\n",
+ from_cmdline, from_cow, cow);
+ return 1;
+}
+
+static int open_ubd_file(char *file, struct openflags *openflags, int shared,
+ char **backing_file_out, int *bitmap_offset_out,
+ unsigned long *bitmap_len_out, int *data_offset_out,
+ int *create_cow_out)
+{
+ time_t mtime;
+ unsigned long long size;
+ __u32 version, align;
+ char *backing_file;
+ int fd, err, sectorsize, asked_switch, mode = 0644;
+
+ fd = os_open_file(file, *openflags, mode);
+ if (fd < 0) {
+ if ((fd == -ENOENT) && (create_cow_out != NULL))
+ *create_cow_out = 1;
+ if (!openflags->w ||
+ ((fd != -EROFS) && (fd != -EACCES)))
+ return fd;
+ openflags->w = 0;
+ fd = os_open_file(file, *openflags, mode);
+ if (fd < 0)
+ return fd;
+ }
+
+ if (shared)
+ printk(KERN_INFO "Not locking \"%s\" on the host\n", file);
+ else {
+ err = os_lock_file(fd, openflags->w);
+ if (err < 0) {
+ printk(KERN_ERR "Failed to lock '%s', err = %d\n",
+ file, -err);
+ goto out_close;
+ }
+ }
+
+ /* Successful return case! */
+ if (backing_file_out == NULL)
+ return fd;
+
+ err = read_cow_header(file_reader, &fd, &version, &backing_file, &mtime,
+ &size, &sectorsize, &align, bitmap_offset_out);
+ if (err && (*backing_file_out != NULL)) {
+ printk(KERN_ERR "Failed to read COW header from COW file "
+ "\"%s\", errno = %d\n", file, -err);
+ goto out_close;
+ }
+ if (err)
+ return fd;
+
+ asked_switch = path_requires_switch(*backing_file_out, backing_file,
+ file);
+
+ /* Allow switching only if no mismatch. */
+ if (asked_switch && !backing_file_mismatch(*backing_file_out, size,
+ mtime)) {
+ printk(KERN_ERR "Switching backing file to '%s'\n",
+ *backing_file_out);
+ err = write_cow_header(file, fd, *backing_file_out,
+ sectorsize, align, &size);
+ if (err) {
+ printk(KERN_ERR "Switch failed, errno = %d\n", -err);
+ goto out_close;
+ }
+ } else {
+ *backing_file_out = backing_file;
+ err = backing_file_mismatch(*backing_file_out, size, mtime);
+ if (err)
+ goto out_close;
+ }
+
+ cow_sizes(version, size, sectorsize, align, *bitmap_offset_out,
+ bitmap_len_out, data_offset_out);
+
+ return fd;
+ out_close:
+ os_close_file(fd);
+ return err;
+}
+
+static int create_cow_file(char *cow_file, char *backing_file,
+ struct openflags flags,
+ int sectorsize, int alignment, int *bitmap_offset_out,
+ unsigned long *bitmap_len_out, int *data_offset_out)
+{
+ int err, fd;
+
+ flags.c = 1;
+ fd = open_ubd_file(cow_file, &flags, 0, NULL, NULL, NULL, NULL, NULL);
+ if (fd < 0) {
+ err = fd;
+ printk(KERN_ERR "Open of COW file '%s' failed, errno = %d\n",
+ cow_file, -err);
+ goto out;
+ }
+
+ err = init_cow_file(fd, cow_file, backing_file, sectorsize, alignment,
+ bitmap_offset_out, bitmap_len_out,
+ data_offset_out);
+ if (!err)
+ return fd;
+ os_close_file(fd);
+ out:
+ return err;
+}
+
+static void ubd_close_dev(struct ubd *ubd_dev)
+{
+ os_close_file(ubd_dev->fd);
+ if(ubd_dev->cow.file == NULL)
+ return;
+
+ os_close_file(ubd_dev->cow.fd);
+ vfree(ubd_dev->cow.bitmap);
+ ubd_dev->cow.bitmap = NULL;
+}
+
+static int ubd_open_dev(struct ubd *ubd_dev)
+{
+ struct openflags flags;
+ char **back_ptr;
+ int err, create_cow, *create_ptr;
+ int fd;
+
+ ubd_dev->openflags = ubd_dev->boot_openflags;
+ create_cow = 0;
+ create_ptr = (ubd_dev->cow.file != NULL) ? &create_cow : NULL;
+ back_ptr = ubd_dev->no_cow ? NULL : &ubd_dev->cow.file;
+
+ fd = open_ubd_file(ubd_dev->file, &ubd_dev->openflags, ubd_dev->shared,
+ back_ptr, &ubd_dev->cow.bitmap_offset,
+ &ubd_dev->cow.bitmap_len, &ubd_dev->cow.data_offset,
+ create_ptr);
+
+ if((fd == -ENOENT) && create_cow){
+ fd = create_cow_file(ubd_dev->file, ubd_dev->cow.file,
+ ubd_dev->openflags, 1 << 9, PAGE_SIZE,
+ &ubd_dev->cow.bitmap_offset,
+ &ubd_dev->cow.bitmap_len,
+ &ubd_dev->cow.data_offset);
+ if(fd >= 0){
+ printk(KERN_INFO "Creating \"%s\" as COW file for "
+ "\"%s\"\n", ubd_dev->file, ubd_dev->cow.file);
+ }
+ }
+
+ if(fd < 0){
+ printk("Failed to open '%s', errno = %d\n", ubd_dev->file,
+ -fd);
+ return fd;
+ }
+ ubd_dev->fd = fd;
+
+ if(ubd_dev->cow.file != NULL){
+ blk_queue_max_hw_sectors(ubd_dev->queue, 8 * sizeof(long));
+
+ err = -ENOMEM;
+ ubd_dev->cow.bitmap = vmalloc(ubd_dev->cow.bitmap_len);
+ if(ubd_dev->cow.bitmap == NULL){
+ printk(KERN_ERR "Failed to vmalloc COW bitmap\n");
+ goto error;
+ }
+ flush_tlb_kernel_vm();
+
+ err = read_cow_bitmap(ubd_dev->fd, ubd_dev->cow.bitmap,
+ ubd_dev->cow.bitmap_offset,
+ ubd_dev->cow.bitmap_len);
+ if(err < 0)
+ goto error;
+
+ flags = ubd_dev->openflags;
+ flags.w = 0;
+ err = open_ubd_file(ubd_dev->cow.file, &flags, ubd_dev->shared, NULL,
+ NULL, NULL, NULL, NULL);
+ if(err < 0) goto error;
+ ubd_dev->cow.fd = err;
+ }
+ return 0;
+ error:
+ os_close_file(ubd_dev->fd);
+ return err;
+}
+
+static void ubd_device_release(struct device *dev)
+{
+ struct ubd *ubd_dev = dev_get_drvdata(dev);
+
+ blk_cleanup_queue(ubd_dev->queue);
+ *ubd_dev = ((struct ubd) DEFAULT_UBD);
+}
+
+static int ubd_disk_register(int major, u64 size, int unit,
+ struct gendisk **disk_out)
+{
+ struct gendisk *disk;
+
+ disk = alloc_disk(1 << UBD_SHIFT);
+ if(disk == NULL)
+ return -ENOMEM;
+
+ disk->major = major;
+ disk->first_minor = unit << UBD_SHIFT;
+ disk->fops = &ubd_blops;
+ set_capacity(disk, size / 512);
+ if (major == UBD_MAJOR)
+ sprintf(disk->disk_name, "ubd%c", 'a' + unit);
+ else
+ sprintf(disk->disk_name, "ubd_fake%d", unit);
+
+ /* sysfs register (not for ide fake devices) */
+ if (major == UBD_MAJOR) {
+ ubd_devs[unit].pdev.id = unit;
+ ubd_devs[unit].pdev.name = DRIVER_NAME;
+ ubd_devs[unit].pdev.dev.release = ubd_device_release;
+ dev_set_drvdata(&ubd_devs[unit].pdev.dev, &ubd_devs[unit]);
+ platform_device_register(&ubd_devs[unit].pdev);
+ disk->driverfs_dev = &ubd_devs[unit].pdev.dev;
+ }
+
+ disk->private_data = &ubd_devs[unit];
+ disk->queue = ubd_devs[unit].queue;
+ add_disk(disk);
+
+ *disk_out = disk;
+ return 0;
+}
+
+#define ROUND_BLOCK(n) ((n + ((1 << 9) - 1)) & (-1 << 9))
+
+static int ubd_add(int n, char **error_out)
+{
+ struct ubd *ubd_dev = &ubd_devs[n];
+ int err = 0;
+
+ if(ubd_dev->file == NULL)
+ goto out;
+
+ err = ubd_file_size(ubd_dev, &ubd_dev->size);
+ if(err < 0){
+ *error_out = "Couldn't determine size of device's file";
+ goto out;
+ }
+
+ ubd_dev->size = ROUND_BLOCK(ubd_dev->size);
+
+ INIT_LIST_HEAD(&ubd_dev->restart);
+ sg_init_table(ubd_dev->sg, MAX_SG);
+
+ err = -ENOMEM;
+ ubd_dev->queue = blk_init_queue(do_ubd_request, &ubd_dev->lock);
+ if (ubd_dev->queue == NULL) {
+ *error_out = "Failed to initialize device queue";
+ goto out;
+ }
+ ubd_dev->queue->queuedata = ubd_dev;
+
+ blk_queue_max_segments(ubd_dev->queue, MAX_SG);
+ err = ubd_disk_register(UBD_MAJOR, ubd_dev->size, n, &ubd_gendisk[n]);
+ if(err){
+ *error_out = "Failed to register device";
+ goto out_cleanup;
+ }
+
+ if (fake_major != UBD_MAJOR)
+ ubd_disk_register(fake_major, ubd_dev->size, n,
+ &fake_gendisk[n]);
+
+ /*
+ * Perhaps this should also be under the "if (fake_major)" above
+ * using the fake_disk->disk_name
+ */
+ if (fake_ide)
+ make_ide_entries(ubd_gendisk[n]->disk_name);
+
+ err = 0;
+out:
+ return err;
+
+out_cleanup:
+ blk_cleanup_queue(ubd_dev->queue);
+ goto out;
+}
+
+static int ubd_config(char *str, char **error_out)
+{
+ int n, ret;
+
+ /* This string is possibly broken up and stored, so it's only
+ * freed if ubd_setup_common fails, or if only general options
+ * were set.
+ */
+ str = kstrdup(str, GFP_KERNEL);
+ if (str == NULL) {
+ *error_out = "Failed to allocate memory";
+ return -ENOMEM;
+ }
+
+ ret = ubd_setup_common(str, &n, error_out);
+ if (ret)
+ goto err_free;
+
+ if (n == -1) {
+ ret = 0;
+ goto err_free;
+ }
+
+ mutex_lock(&ubd_lock);
+ ret = ubd_add(n, error_out);
+ if (ret)
+ ubd_devs[n].file = NULL;
+ mutex_unlock(&ubd_lock);
+
+out:
+ return ret;
+
+err_free:
+ kfree(str);
+ goto out;
+}
+
+static int ubd_get_config(char *name, char *str, int size, char **error_out)
+{
+ struct ubd *ubd_dev;
+ int n, len = 0;
+
+ n = parse_unit(&name);
+ if((n >= MAX_DEV) || (n < 0)){
+ *error_out = "ubd_get_config : device number out of range";
+ return -1;
+ }
+
+ ubd_dev = &ubd_devs[n];
+ mutex_lock(&ubd_lock);
+
+ if(ubd_dev->file == NULL){
+ CONFIG_CHUNK(str, size, len, "", 1);
+ goto out;
+ }
+
+ CONFIG_CHUNK(str, size, len, ubd_dev->file, 0);
+
+ if(ubd_dev->cow.file != NULL){
+ CONFIG_CHUNK(str, size, len, ",", 0);
+ CONFIG_CHUNK(str, size, len, ubd_dev->cow.file, 1);
+ }
+ else CONFIG_CHUNK(str, size, len, "", 1);
+
+ out:
+ mutex_unlock(&ubd_lock);
+ return len;
+}
+
+static int ubd_id(char **str, int *start_out, int *end_out)
+{
+ int n;
+
+ n = parse_unit(str);
+ *start_out = 0;
+ *end_out = MAX_DEV - 1;
+ return n;
+}
+
+static int ubd_remove(int n, char **error_out)
+{
+ struct gendisk *disk = ubd_gendisk[n];
+ struct ubd *ubd_dev;
+ int err = -ENODEV;
+
+ mutex_lock(&ubd_lock);
+
+ ubd_dev = &ubd_devs[n];
+
+ if(ubd_dev->file == NULL)
+ goto out;
+
+ /* you cannot remove a open disk */
+ err = -EBUSY;
+ if(ubd_dev->count > 0)
+ goto out;
+
+ ubd_gendisk[n] = NULL;
+ if(disk != NULL){
+ del_gendisk(disk);
+ put_disk(disk);
+ }
+
+ if(fake_gendisk[n] != NULL){
+ del_gendisk(fake_gendisk[n]);
+ put_disk(fake_gendisk[n]);
+ fake_gendisk[n] = NULL;
+ }
+
+ err = 0;
+ platform_device_unregister(&ubd_dev->pdev);
+out:
+ mutex_unlock(&ubd_lock);
+ return err;
+}
+
+/* All these are called by mconsole in process context and without
+ * ubd-specific locks. The structure itself is const except for .list.
+ */
+static struct mc_device ubd_mc = {
+ .list = LIST_HEAD_INIT(ubd_mc.list),
+ .name = "ubd",
+ .config = ubd_config,
+ .get_config = ubd_get_config,
+ .id = ubd_id,
+ .remove = ubd_remove,
+};
+
+static int __init ubd_mc_init(void)
+{
+ mconsole_register_dev(&ubd_mc);
+ return 0;
+}
+
+__initcall(ubd_mc_init);
+
+static int __init ubd0_init(void)
+{
+ struct ubd *ubd_dev = &ubd_devs[0];
+
+ mutex_lock(&ubd_lock);
+ if(ubd_dev->file == NULL)
+ ubd_dev->file = "root_fs";
+ mutex_unlock(&ubd_lock);
+
+ return 0;
+}
+
+__initcall(ubd0_init);
+
+/* Used in ubd_init, which is an initcall */
+static struct platform_driver ubd_driver = {
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+
+static int __init ubd_init(void)
+{
+ char *error;
+ int i, err;
+
+ if (register_blkdev(UBD_MAJOR, "ubd"))
+ return -1;
+
+ if (fake_major != UBD_MAJOR) {
+ char name[sizeof("ubd_nnn\0")];
+
+ snprintf(name, sizeof(name), "ubd_%d", fake_major);
+ if (register_blkdev(fake_major, "ubd"))
+ return -1;
+ }
+ platform_driver_register(&ubd_driver);
+ mutex_lock(&ubd_lock);
+ for (i = 0; i < MAX_DEV; i++){
+ err = ubd_add(i, &error);
+ if(err)
+ printk(KERN_ERR "Failed to initialize ubd device %d :"
+ "%s\n", i, error);
+ }
+ mutex_unlock(&ubd_lock);
+ return 0;
+}
+
+late_initcall(ubd_init);
+
+static int __init ubd_driver_init(void){
+ unsigned long stack;
+ int err;
+
+ /* Set by CONFIG_BLK_DEV_UBD_SYNC or ubd=sync.*/
+ if(global_openflags.s){
+ printk(KERN_INFO "ubd: Synchronous mode\n");
+ /* Letting ubd=sync be like using ubd#s= instead of ubd#= is
+ * enough. So use anyway the io thread. */
+ }
+ stack = alloc_stack(0, 0);
+ io_pid = start_io_thread(stack + PAGE_SIZE - sizeof(void *),
+ &thread_fd);
+ if(io_pid < 0){
+ printk(KERN_ERR
+ "ubd : Failed to start I/O thread (errno = %d) - "
+ "falling back to synchronous I/O\n", -io_pid);
+ io_pid = -1;
+ return 0;
+ }
+ err = um_request_irq(UBD_IRQ, thread_fd, IRQ_READ, ubd_intr,
+ IRQF_DISABLED, "ubd", ubd_devs);
+ if(err != 0)
+ printk(KERN_ERR "um_request_irq failed - errno = %d\n", -err);
+ return 0;
+}
+
+device_initcall(ubd_driver_init);
+
+static int ubd_open(struct block_device *bdev, fmode_t mode)
+{
+ struct gendisk *disk = bdev->bd_disk;
+ struct ubd *ubd_dev = disk->private_data;
+ int err = 0;
+
+ mutex_lock(&ubd_mutex);
+ if(ubd_dev->count == 0){
+ err = ubd_open_dev(ubd_dev);
+ if(err){
+ printk(KERN_ERR "%s: Can't open \"%s\": errno = %d\n",
+ disk->disk_name, ubd_dev->file, -err);
+ goto out;
+ }
+ }
+ ubd_dev->count++;
+ set_disk_ro(disk, !ubd_dev->openflags.w);
+
+ /* This should no more be needed. And it didn't work anyway to exclude
+ * read-write remounting of filesystems.*/
+ /*if((mode & FMODE_WRITE) && !ubd_dev->openflags.w){
+ if(--ubd_dev->count == 0) ubd_close_dev(ubd_dev);
+ err = -EROFS;
+ }*/
+out:
+ mutex_unlock(&ubd_mutex);
+ return err;
+}
+
+static int ubd_release(struct gendisk *disk, fmode_t mode)
+{
+ struct ubd *ubd_dev = disk->private_data;
+
+ mutex_lock(&ubd_mutex);
+ if(--ubd_dev->count == 0)
+ ubd_close_dev(ubd_dev);
+ mutex_unlock(&ubd_mutex);
+ return 0;
+}
+
+static void cowify_bitmap(__u64 io_offset, int length, unsigned long *cow_mask,
+ __u64 *cow_offset, unsigned long *bitmap,
+ __u64 bitmap_offset, unsigned long *bitmap_words,
+ __u64 bitmap_len)
+{
+ __u64 sector = io_offset >> 9;
+ int i, update_bitmap = 0;
+
+ for(i = 0; i < length >> 9; i++){
+ if(cow_mask != NULL)
+ ubd_set_bit(i, (unsigned char *) cow_mask);
+ if(ubd_test_bit(sector + i, (unsigned char *) bitmap))
+ continue;
+
+ update_bitmap = 1;
+ ubd_set_bit(sector + i, (unsigned char *) bitmap);
+ }
+
+ if(!update_bitmap)
+ return;
+
+ *cow_offset = sector / (sizeof(unsigned long) * 8);
+
+ /* This takes care of the case where we're exactly at the end of the
+ * device, and *cow_offset + 1 is off the end. So, just back it up
+ * by one word. Thanks to Lynn Kerby for the fix and James McMechan
+ * for the original diagnosis.
+ */
+ if (*cow_offset == (DIV_ROUND_UP(bitmap_len,
+ sizeof(unsigned long)) - 1))
+ (*cow_offset)--;
+
+ bitmap_words[0] = bitmap[*cow_offset];
+ bitmap_words[1] = bitmap[*cow_offset + 1];
+
+ *cow_offset *= sizeof(unsigned long);
+ *cow_offset += bitmap_offset;
+}
+
+static void cowify_req(struct io_thread_req *req, unsigned long *bitmap,
+ __u64 bitmap_offset, __u64 bitmap_len)
+{
+ __u64 sector = req->offset >> 9;
+ int i;
+
+ if(req->length > (sizeof(req->sector_mask) * 8) << 9)
+ panic("Operation too long");
+
+ if(req->op == UBD_READ) {
+ for(i = 0; i < req->length >> 9; i++){
+ if(ubd_test_bit(sector + i, (unsigned char *) bitmap))
+ ubd_set_bit(i, (unsigned char *)
+ &req->sector_mask);
+ }
+ }
+ else cowify_bitmap(req->offset, req->length, &req->sector_mask,
+ &req->cow_offset, bitmap, bitmap_offset,
+ req->bitmap_words, bitmap_len);
+}
+
+/* Called with dev->lock held */
+static void prepare_request(struct request *req, struct io_thread_req *io_req,
+ unsigned long long offset, int page_offset,
+ int len, struct page *page)
+{
+ struct gendisk *disk = req->rq_disk;
+ struct ubd *ubd_dev = disk->private_data;
+
+ io_req->req = req;
+ io_req->fds[0] = (ubd_dev->cow.file != NULL) ? ubd_dev->cow.fd :
+ ubd_dev->fd;
+ io_req->fds[1] = ubd_dev->fd;
+ io_req->cow_offset = -1;
+ io_req->offset = offset;
+ io_req->length = len;
+ io_req->error = 0;
+ io_req->sector_mask = 0;
+
+ io_req->op = (rq_data_dir(req) == READ) ? UBD_READ : UBD_WRITE;
+ io_req->offsets[0] = 0;
+ io_req->offsets[1] = ubd_dev->cow.data_offset;
+ io_req->buffer = page_address(page) + page_offset;
+ io_req->sectorsize = 1 << 9;
+
+ if(ubd_dev->cow.file != NULL)
+ cowify_req(io_req, ubd_dev->cow.bitmap,
+ ubd_dev->cow.bitmap_offset, ubd_dev->cow.bitmap_len);
+
+}
+
+/* Called with dev->lock held */
+static void do_ubd_request(struct request_queue *q)
+{
+ struct io_thread_req *io_req;
+ struct request *req;
+ int n;
+
+ while(1){
+ struct ubd *dev = q->queuedata;
+ if(dev->end_sg == 0){
+ struct request *req = blk_fetch_request(q);
+ if(req == NULL)
+ return;
+
+ dev->request = req;
+ dev->rq_pos = blk_rq_pos(req);
+ dev->start_sg = 0;
+ dev->end_sg = blk_rq_map_sg(q, req, dev->sg);
+ }
+
+ req = dev->request;
+ while(dev->start_sg < dev->end_sg){
+ struct scatterlist *sg = &dev->sg[dev->start_sg];
+
+ io_req = kmalloc(sizeof(struct io_thread_req),
+ GFP_ATOMIC);
+ if(io_req == NULL){
+ if(list_empty(&dev->restart))
+ list_add(&dev->restart, &restart);
+ return;
+ }
+ prepare_request(req, io_req,
+ (unsigned long long)dev->rq_pos << 9,
+ sg->offset, sg->length, sg_page(sg));
+
+ n = os_write_file(thread_fd, &io_req,
+ sizeof(struct io_thread_req *));
+ if(n != sizeof(struct io_thread_req *)){
+ if(n != -EAGAIN)
+ printk("write to io thread failed, "
+ "errno = %d\n", -n);
+ else if(list_empty(&dev->restart))
+ list_add(&dev->restart, &restart);
+ kfree(io_req);
+ return;
+ }
+
+ dev->rq_pos += sg->length >> 9;
+ dev->start_sg++;
+ }
+ dev->end_sg = 0;
+ dev->request = NULL;
+ }
+}
+
+static int ubd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+ struct ubd *ubd_dev = bdev->bd_disk->private_data;
+
+ geo->heads = 128;
+ geo->sectors = 32;
+ geo->cylinders = ubd_dev->size / (128 * 32 * 512);
+ return 0;
+}
+
+static int ubd_ioctl(struct block_device *bdev, fmode_t mode,
+ unsigned int cmd, unsigned long arg)
+{
+ struct ubd *ubd_dev = bdev->bd_disk->private_data;
+ u16 ubd_id[ATA_ID_WORDS];
+
+ switch (cmd) {
+ struct cdrom_volctrl volume;
+ case HDIO_GET_IDENTITY:
+ memset(&ubd_id, 0, ATA_ID_WORDS * 2);
+ ubd_id[ATA_ID_CYLS] = ubd_dev->size / (128 * 32 * 512);
+ ubd_id[ATA_ID_HEADS] = 128;
+ ubd_id[ATA_ID_SECTORS] = 32;
+ if(copy_to_user((char __user *) arg, (char *) &ubd_id,
+ sizeof(ubd_id)))
+ return -EFAULT;
+ return 0;
+
+ case CDROMVOLREAD:
+ if(copy_from_user(&volume, (char __user *) arg, sizeof(volume)))
+ return -EFAULT;
+ volume.channel0 = 255;
+ volume.channel1 = 255;
+ volume.channel2 = 255;
+ volume.channel3 = 255;
+ if(copy_to_user((char __user *) arg, &volume, sizeof(volume)))
+ return -EFAULT;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int update_bitmap(struct io_thread_req *req)
+{
+ int n;
+
+ if(req->cow_offset == -1)
+ return 0;
+
+ n = os_seek_file(req->fds[1], req->cow_offset);
+ if(n < 0){
+ printk("do_io - bitmap lseek failed : err = %d\n", -n);
+ return 1;
+ }
+
+ n = os_write_file(req->fds[1], &req->bitmap_words,
+ sizeof(req->bitmap_words));
+ if(n != sizeof(req->bitmap_words)){
+ printk("do_io - bitmap update failed, err = %d fd = %d\n", -n,
+ req->fds[1]);
+ return 1;
+ }
+
+ return 0;
+}
+
+static void do_io(struct io_thread_req *req)
+{
+ char *buf;
+ unsigned long len;
+ int n, nsectors, start, end, bit;
+ int err;
+ __u64 off;
+
+ nsectors = req->length / req->sectorsize;
+ start = 0;
+ do {
+ bit = ubd_test_bit(start, (unsigned char *) &req->sector_mask);
+ end = start;
+ while((end < nsectors) &&
+ (ubd_test_bit(end, (unsigned char *)
+ &req->sector_mask) == bit))
+ end++;
+
+ off = req->offset + req->offsets[bit] +
+ start * req->sectorsize;
+ len = (end - start) * req->sectorsize;
+ buf = &req->buffer[start * req->sectorsize];
+
+ err = os_seek_file(req->fds[bit], off);
+ if(err < 0){
+ printk("do_io - lseek failed : err = %d\n", -err);
+ req->error = 1;
+ return;
+ }
+ if(req->op == UBD_READ){
+ n = 0;
+ do {
+ buf = &buf[n];
+ len -= n;
+ n = os_read_file(req->fds[bit], buf, len);
+ if (n < 0) {
+ printk("do_io - read failed, err = %d "
+ "fd = %d\n", -n, req->fds[bit]);
+ req->error = 1;
+ return;
+ }
+ } while((n < len) && (n != 0));
+ if (n < len) memset(&buf[n], 0, len - n);
+ } else {
+ n = os_write_file(req->fds[bit], buf, len);
+ if(n != len){
+ printk("do_io - write failed err = %d "
+ "fd = %d\n", -n, req->fds[bit]);
+ req->error = 1;
+ return;
+ }
+ }
+
+ start = end;
+ } while(start < nsectors);
+
+ req->error = update_bitmap(req);
+}
+
+/* Changed in start_io_thread, which is serialized by being called only
+ * from ubd_init, which is an initcall.
+ */
+int kernel_fd = -1;
+
+/* Only changed by the io thread. XXX: currently unused. */
+static int io_count = 0;
+
+int io_thread(void *arg)
+{
+ struct io_thread_req *req;
+ int n;
+
+ ignore_sigwinch_sig();
+ while(1){
+ n = os_read_file(kernel_fd, &req,
+ sizeof(struct io_thread_req *));
+ if(n != sizeof(struct io_thread_req *)){
+ if(n < 0)
+ printk("io_thread - read failed, fd = %d, "
+ "err = %d\n", kernel_fd, -n);
+ else {
+ printk("io_thread - short read, fd = %d, "
+ "length = %d\n", kernel_fd, n);
+ }
+ continue;
+ }
+ io_count++;
+ do_io(req);
+ n = os_write_file(kernel_fd, &req,
+ sizeof(struct io_thread_req *));
+ if(n != sizeof(struct io_thread_req *))
+ printk("io_thread - write failed, fd = %d, err = %d\n",
+ kernel_fd, -n);
+ }
+
+ return 0;
+}
diff --git a/arch/um/drivers/ubd_user.c b/arch/um/drivers/ubd_user.c
new file mode 100644
index 00000000000..007b94d9772
--- /dev/null
+++ b/arch/um/drivers/ubd_user.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 Ridgerun,Inc (glonnon@ridgerun.com)
+ * Licensed under the GPL
+ */
+
+#include <stddef.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sched.h>
+#include <signal.h>
+#include <string.h>
+#include <netinet/in.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+#include "asm/types.h"
+#include "ubd_user.h"
+#include "os.h"
+#include "cow.h"
+
+#include <endian.h>
+#include <byteswap.h>
+
+void ignore_sigwinch_sig(void)
+{
+ signal(SIGWINCH, SIG_IGN);
+}
+
+int start_io_thread(unsigned long sp, int *fd_out)
+{
+ int pid, fds[2], err;
+
+ err = os_pipe(fds, 1, 1);
+ if(err < 0){
+ printk("start_io_thread - os_pipe failed, err = %d\n", -err);
+ goto out;
+ }
+
+ kernel_fd = fds[0];
+ *fd_out = fds[1];
+
+ err = os_set_fd_block(*fd_out, 0);
+ if (err) {
+ printk("start_io_thread - failed to set nonblocking I/O.\n");
+ goto out_close;
+ }
+
+ pid = clone(io_thread, (void *) sp, CLONE_FILES | CLONE_VM, NULL);
+ if(pid < 0){
+ err = -errno;
+ printk("start_io_thread - clone failed : errno = %d\n", errno);
+ goto out_close;
+ }
+
+ return(pid);
+
+ out_close:
+ os_close_file(fds[0]);
+ os_close_file(fds[1]);
+ kernel_fd = -1;
+ *fd_out = -1;
+ out:
+ return err;
+}
diff --git a/arch/um/drivers/ubd_user.h b/arch/um/drivers/ubd_user.h
new file mode 100644
index 00000000000..3845051f1b1
--- /dev/null
+++ b/arch/um/drivers/ubd_user.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Copyright (C) 2001 RidgeRun, Inc (glonnon@ridgerun.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_UBD_USER_H
+#define __UM_UBD_USER_H
+
+extern void ignore_sigwinch_sig(void);
+extern int start_io_thread(unsigned long sp, int *fds_out);
+extern int io_thread(void *arg);
+extern int kernel_fd;
+
+#endif
+
diff --git a/arch/um/drivers/umcast.h b/arch/um/drivers/umcast.h
new file mode 100644
index 00000000000..6f8c0fe890f
--- /dev/null
+++ b/arch/um/drivers/umcast.h
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __DRIVERS_UMCAST_H
+#define __DRIVERS_UMCAST_H
+
+#include "net_user.h"
+
+struct umcast_data {
+ char *addr;
+ unsigned short lport;
+ unsigned short rport;
+ void *listen_addr;
+ void *remote_addr;
+ int ttl;
+ int unicast;
+ void *dev;
+};
+
+extern const struct net_user_info umcast_user_info;
+
+extern int umcast_user_write(int fd, void *buf, int len,
+ struct umcast_data *pri);
+
+#endif
diff --git a/arch/um/drivers/umcast_kern.c b/arch/um/drivers/umcast_kern.c
new file mode 100644
index 00000000000..42dab11d2ec
--- /dev/null
+++ b/arch/um/drivers/umcast_kern.c
@@ -0,0 +1,188 @@
+/*
+ * user-mode-linux networking multicast transport
+ * Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ *
+ * based on the existing uml-networking code, which is
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ *
+ * Licensed under the GPL.
+ */
+
+#include "linux/init.h"
+#include <linux/netdevice.h>
+#include "umcast.h"
+#include "net_kern.h"
+
+struct umcast_init {
+ char *addr;
+ int lport;
+ int rport;
+ int ttl;
+ bool unicast;
+};
+
+static void umcast_init(struct net_device *dev, void *data)
+{
+ struct uml_net_private *pri;
+ struct umcast_data *dpri;
+ struct umcast_init *init = data;
+
+ pri = netdev_priv(dev);
+ dpri = (struct umcast_data *) pri->user;
+ dpri->addr = init->addr;
+ dpri->lport = init->lport;
+ dpri->rport = init->rport;
+ dpri->unicast = init->unicast;
+ dpri->ttl = init->ttl;
+ dpri->dev = dev;
+
+ if (dpri->unicast) {
+ printk(KERN_INFO "ucast backend address: %s:%u listen port: "
+ "%u\n", dpri->addr, dpri->rport, dpri->lport);
+ } else {
+ printk(KERN_INFO "mcast backend multicast address: %s:%u, "
+ "TTL:%u\n", dpri->addr, dpri->lport, dpri->ttl);
+ }
+}
+
+static int umcast_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return net_recvfrom(fd, skb_mac_header(skb),
+ skb->dev->mtu + ETH_HEADER_OTHER);
+}
+
+static int umcast_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ return umcast_user_write(fd, skb->data, skb->len,
+ (struct umcast_data *) &lp->user);
+}
+
+static const struct net_kern_info umcast_kern_info = {
+ .init = umcast_init,
+ .protocol = eth_protocol,
+ .read = umcast_read,
+ .write = umcast_write,
+};
+
+static int mcast_setup(char *str, char **mac_out, void *data)
+{
+ struct umcast_init *init = data;
+ char *port_str = NULL, *ttl_str = NULL, *remain;
+ char *last;
+
+ *init = ((struct umcast_init)
+ { .addr = "239.192.168.1",
+ .lport = 1102,
+ .ttl = 1 });
+
+ remain = split_if_spec(str, mac_out, &init->addr, &port_str, &ttl_str,
+ NULL);
+ if (remain != NULL) {
+ printk(KERN_ERR "mcast_setup - Extra garbage on "
+ "specification : '%s'\n", remain);
+ return 0;
+ }
+
+ if (port_str != NULL) {
+ init->lport = simple_strtoul(port_str, &last, 10);
+ if ((*last != '\0') || (last == port_str)) {
+ printk(KERN_ERR "mcast_setup - Bad port : '%s'\n",
+ port_str);
+ return 0;
+ }
+ }
+
+ if (ttl_str != NULL) {
+ init->ttl = simple_strtoul(ttl_str, &last, 10);
+ if ((*last != '\0') || (last == ttl_str)) {
+ printk(KERN_ERR "mcast_setup - Bad ttl : '%s'\n",
+ ttl_str);
+ return 0;
+ }
+ }
+
+ init->unicast = false;
+ init->rport = init->lport;
+
+ printk(KERN_INFO "Configured mcast device: %s:%u-%u\n", init->addr,
+ init->lport, init->ttl);
+
+ return 1;
+}
+
+static int ucast_setup(char *str, char **mac_out, void *data)
+{
+ struct umcast_init *init = data;
+ char *lport_str = NULL, *rport_str = NULL, *remain;
+ char *last;
+
+ *init = ((struct umcast_init)
+ { .addr = "",
+ .lport = 1102,
+ .rport = 1102 });
+
+ remain = split_if_spec(str, mac_out, &init->addr,
+ &lport_str, &rport_str, NULL);
+ if (remain != NULL) {
+ printk(KERN_ERR "ucast_setup - Extra garbage on "
+ "specification : '%s'\n", remain);
+ return 0;
+ }
+
+ if (lport_str != NULL) {
+ init->lport = simple_strtoul(lport_str, &last, 10);
+ if ((*last != '\0') || (last == lport_str)) {
+ printk(KERN_ERR "ucast_setup - Bad listen port : "
+ "'%s'\n", lport_str);
+ return 0;
+ }
+ }
+
+ if (rport_str != NULL) {
+ init->rport = simple_strtoul(rport_str, &last, 10);
+ if ((*last != '\0') || (last == rport_str)) {
+ printk(KERN_ERR "ucast_setup - Bad remote port : "
+ "'%s'\n", rport_str);
+ return 0;
+ }
+ }
+
+ init->unicast = true;
+
+ printk(KERN_INFO "Configured ucast device: :%u -> %s:%u\n",
+ init->lport, init->addr, init->rport);
+
+ return 1;
+}
+
+static struct transport mcast_transport = {
+ .list = LIST_HEAD_INIT(mcast_transport.list),
+ .name = "mcast",
+ .setup = mcast_setup,
+ .user = &umcast_user_info,
+ .kern = &umcast_kern_info,
+ .private_size = sizeof(struct umcast_data),
+ .setup_size = sizeof(struct umcast_init),
+};
+
+static struct transport ucast_transport = {
+ .list = LIST_HEAD_INIT(ucast_transport.list),
+ .name = "ucast",
+ .setup = ucast_setup,
+ .user = &umcast_user_info,
+ .kern = &umcast_kern_info,
+ .private_size = sizeof(struct umcast_data),
+ .setup_size = sizeof(struct umcast_init),
+};
+
+static int register_umcast(void)
+{
+ register_transport(&mcast_transport);
+ register_transport(&ucast_transport);
+ return 0;
+}
+
+late_initcall(register_umcast);
diff --git a/arch/um/drivers/umcast_user.c b/arch/um/drivers/umcast_user.c
new file mode 100644
index 00000000000..010fa2d849e
--- /dev/null
+++ b/arch/um/drivers/umcast_user.c
@@ -0,0 +1,184 @@
+/*
+ * user-mode-linux networking multicast transport
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright (C) 2001 by Harald Welte <laforge@gnumonks.org>
+ *
+ * based on the existing uml-networking code, which is
+ * Copyright (C) 2001 Lennert Buytenhek (buytenh@gnu.org) and
+ * James Leu (jleu@mindspring.net).
+ * Copyright (C) 2001 by various other people who didn't put their name here.
+ *
+ * Licensed under the GPL.
+ *
+ */
+
+#include <unistd.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include "umcast.h"
+#include "net_user.h"
+#include "um_malloc.h"
+
+static struct sockaddr_in *new_addr(char *addr, unsigned short port)
+{
+ struct sockaddr_in *sin;
+
+ sin = uml_kmalloc(sizeof(struct sockaddr_in), UM_GFP_KERNEL);
+ if (sin == NULL) {
+ printk(UM_KERN_ERR "new_addr: allocation of sockaddr_in "
+ "failed\n");
+ return NULL;
+ }
+ sin->sin_family = AF_INET;
+ if (addr)
+ sin->sin_addr.s_addr = in_aton(addr);
+ else
+ sin->sin_addr.s_addr = INADDR_ANY;
+ sin->sin_port = htons(port);
+ return sin;
+}
+
+static int umcast_user_init(void *data, void *dev)
+{
+ struct umcast_data *pri = data;
+
+ pri->remote_addr = new_addr(pri->addr, pri->rport);
+ if (pri->unicast)
+ pri->listen_addr = new_addr(NULL, pri->lport);
+ else
+ pri->listen_addr = pri->remote_addr;
+ pri->dev = dev;
+ return 0;
+}
+
+static void umcast_remove(void *data)
+{
+ struct umcast_data *pri = data;
+
+ kfree(pri->listen_addr);
+ if (pri->unicast)
+ kfree(pri->remote_addr);
+ pri->listen_addr = pri->remote_addr = NULL;
+}
+
+static int umcast_open(void *data)
+{
+ struct umcast_data *pri = data;
+ struct sockaddr_in *lsin = pri->listen_addr;
+ struct sockaddr_in *rsin = pri->remote_addr;
+ struct ip_mreq mreq;
+ int fd, yes = 1, err = -EINVAL;
+
+
+ if ((!pri->unicast && lsin->sin_addr.s_addr == 0) ||
+ (rsin->sin_addr.s_addr == 0) ||
+ (lsin->sin_port == 0) || (rsin->sin_port == 0))
+ goto out;
+
+ fd = socket(AF_INET, SOCK_DGRAM, 0);
+
+ if (fd < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "umcast_open : data socket failed, "
+ "errno = %d\n", errno);
+ goto out;
+ }
+
+ if (setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "umcast_open: SO_REUSEADDR failed, "
+ "errno = %d\n", errno);
+ goto out_close;
+ }
+
+ if (!pri->unicast) {
+ /* set ttl according to config */
+ if (setsockopt(fd, SOL_IP, IP_MULTICAST_TTL, &pri->ttl,
+ sizeof(pri->ttl)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "umcast_open: IP_MULTICAST_TTL "
+ "failed, error = %d\n", errno);
+ goto out_close;
+ }
+
+ /* set LOOP, so data does get fed back to local sockets */
+ if (setsockopt(fd, SOL_IP, IP_MULTICAST_LOOP,
+ &yes, sizeof(yes)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "umcast_open: IP_MULTICAST_LOOP "
+ "failed, error = %d\n", errno);
+ goto out_close;
+ }
+ }
+
+ /* bind socket to the address */
+ if (bind(fd, (struct sockaddr *) lsin, sizeof(*lsin)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "umcast_open : data bind failed, "
+ "errno = %d\n", errno);
+ goto out_close;
+ }
+
+ if (!pri->unicast) {
+ /* subscribe to the multicast group */
+ mreq.imr_multiaddr.s_addr = lsin->sin_addr.s_addr;
+ mreq.imr_interface.s_addr = 0;
+ if (setsockopt(fd, SOL_IP, IP_ADD_MEMBERSHIP,
+ &mreq, sizeof(mreq)) < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "umcast_open: IP_ADD_MEMBERSHIP "
+ "failed, error = %d\n", errno);
+ printk(UM_KERN_ERR "There appears not to be a "
+ "multicast-capable network interface on the "
+ "host.\n");
+ printk(UM_KERN_ERR "eth0 should be configured in order "
+ "to use the multicast transport.\n");
+ goto out_close;
+ }
+ }
+
+ return fd;
+
+ out_close:
+ close(fd);
+ out:
+ return err;
+}
+
+static void umcast_close(int fd, void *data)
+{
+ struct umcast_data *pri = data;
+
+ if (!pri->unicast) {
+ struct ip_mreq mreq;
+ struct sockaddr_in *lsin = pri->listen_addr;
+
+ mreq.imr_multiaddr.s_addr = lsin->sin_addr.s_addr;
+ mreq.imr_interface.s_addr = 0;
+ if (setsockopt(fd, SOL_IP, IP_DROP_MEMBERSHIP,
+ &mreq, sizeof(mreq)) < 0) {
+ printk(UM_KERN_ERR "umcast_close: IP_DROP_MEMBERSHIP "
+ "failed, error = %d\n", errno);
+ }
+ }
+
+ close(fd);
+}
+
+int umcast_user_write(int fd, void *buf, int len, struct umcast_data *pri)
+{
+ struct sockaddr_in *data_addr = pri->remote_addr;
+
+ return net_sendto(fd, buf, len, data_addr, sizeof(*data_addr));
+}
+
+const struct net_user_info umcast_user_info = {
+ .init = umcast_user_init,
+ .open = umcast_open,
+ .close = umcast_close,
+ .remove = umcast_remove,
+ .add_address = NULL,
+ .delete_address = NULL,
+ .mtu = ETH_MAX_PACKET,
+ .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
+};
diff --git a/arch/um/drivers/vde.h b/arch/um/drivers/vde.h
new file mode 100644
index 00000000000..fc3a05902ba
--- /dev/null
+++ b/arch/um/drivers/vde.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
+ * Licensed under the GPL.
+ */
+
+#ifndef __UM_VDE_H__
+#define __UM_VDE_H__
+
+struct vde_data {
+ char *vde_switch;
+ char *descr;
+ void *args;
+ void *conn;
+ void *dev;
+};
+
+struct vde_init {
+ char *vde_switch;
+ char *descr;
+ int port;
+ char *group;
+ int mode;
+};
+
+extern const struct net_user_info vde_user_info;
+
+extern void vde_init_libstuff(struct vde_data *vpri, struct vde_init *init);
+
+extern int vde_user_read(void *conn, void *buf, int len);
+extern int vde_user_write(void *conn, void *buf, int len);
+
+#endif
diff --git a/arch/um/drivers/vde_kern.c b/arch/um/drivers/vde_kern.c
new file mode 100644
index 00000000000..1b852bffdeb
--- /dev/null
+++ b/arch/um/drivers/vde_kern.c
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
+ * Licensed under the GPL.
+ *
+ * Transport usage:
+ * ethN=vde,<vde_switch>,<mac addr>,<port>,<group>,<mode>,<description>
+ *
+ */
+
+#include "linux/init.h"
+#include <linux/netdevice.h>
+#include "net_kern.h"
+#include "net_user.h"
+#include "vde.h"
+
+static void vde_init(struct net_device *dev, void *data)
+{
+ struct vde_init *init = data;
+ struct uml_net_private *pri;
+ struct vde_data *vpri;
+
+ pri = netdev_priv(dev);
+ vpri = (struct vde_data *) pri->user;
+
+ vpri->vde_switch = init->vde_switch;
+ vpri->descr = init->descr ? init->descr : "UML vde_transport";
+ vpri->args = NULL;
+ vpri->conn = NULL;
+ vpri->dev = dev;
+
+ printk("vde backend - %s, ", vpri->vde_switch ?
+ vpri->vde_switch : "(default socket)");
+
+ vde_init_libstuff(vpri, init);
+
+ printk("\n");
+}
+
+static int vde_read(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ struct vde_data *pri = (struct vde_data *) &lp->user;
+
+ if (pri->conn != NULL)
+ return vde_user_read(pri->conn, skb_mac_header(skb),
+ skb->dev->mtu + ETH_HEADER_OTHER);
+
+ printk(KERN_ERR "vde_read - we have no VDECONN to read from");
+ return -EBADF;
+}
+
+static int vde_write(int fd, struct sk_buff *skb, struct uml_net_private *lp)
+{
+ struct vde_data *pri = (struct vde_data *) &lp->user;
+
+ if (pri->conn != NULL)
+ return vde_user_write((void *)pri->conn, skb->data,
+ skb->len);
+
+ printk(KERN_ERR "vde_write - we have no VDECONN to write to");
+ return -EBADF;
+}
+
+static const struct net_kern_info vde_kern_info = {
+ .init = vde_init,
+ .protocol = eth_protocol,
+ .read = vde_read,
+ .write = vde_write,
+};
+
+static int vde_setup(char *str, char **mac_out, void *data)
+{
+ struct vde_init *init = data;
+ char *remain, *port_str = NULL, *mode_str = NULL, *last;
+
+ *init = ((struct vde_init)
+ { .vde_switch = NULL,
+ .descr = NULL,
+ .port = 0,
+ .group = NULL,
+ .mode = 0 });
+
+ remain = split_if_spec(str, &init->vde_switch, mac_out, &port_str,
+ &init->group, &mode_str, &init->descr, NULL);
+
+ if (remain != NULL)
+ printk(KERN_WARNING "vde_setup - Ignoring extra data :"
+ "'%s'\n", remain);
+
+ if (port_str != NULL) {
+ init->port = simple_strtoul(port_str, &last, 10);
+ if ((*last != '\0') || (last == port_str)) {
+ printk(KERN_ERR "vde_setup - Bad port : '%s'\n",
+ port_str);
+ return 0;
+ }
+ }
+
+ if (mode_str != NULL) {
+ init->mode = simple_strtoul(mode_str, &last, 8);
+ if ((*last != '\0') || (last == mode_str)) {
+ printk(KERN_ERR "vde_setup - Bad mode : '%s'\n",
+ mode_str);
+ return 0;
+ }
+ }
+
+ printk(KERN_INFO "Configured vde device: %s\n", init->vde_switch ?
+ init->vde_switch : "(default socket)");
+
+ return 1;
+}
+
+static struct transport vde_transport = {
+ .list = LIST_HEAD_INIT(vde_transport.list),
+ .name = "vde",
+ .setup = vde_setup,
+ .user = &vde_user_info,
+ .kern = &vde_kern_info,
+ .private_size = sizeof(struct vde_data),
+ .setup_size = sizeof(struct vde_init),
+};
+
+static int register_vde(void)
+{
+ register_transport(&vde_transport);
+ return 0;
+}
+
+late_initcall(register_vde);
diff --git a/arch/um/drivers/vde_user.c b/arch/um/drivers/vde_user.c
new file mode 100644
index 00000000000..b8c286748d3
--- /dev/null
+++ b/arch/um/drivers/vde_user.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2007 Luca Bigliardi (shammash@artha.org).
+ * Licensed under the GPL.
+ */
+
+#include <stddef.h>
+#include <errno.h>
+#include <libvdeplug.h>
+#include "net_user.h"
+#include "um_malloc.h"
+#include "vde.h"
+
+static int vde_user_init(void *data, void *dev)
+{
+ struct vde_data *pri = data;
+ VDECONN *conn = NULL;
+ int err = -EINVAL;
+
+ pri->dev = dev;
+
+ conn = vde_open(pri->vde_switch, pri->descr, pri->args);
+
+ if (conn == NULL) {
+ err = -errno;
+ printk(UM_KERN_ERR "vde_user_init: vde_open failed, "
+ "errno = %d\n", errno);
+ return err;
+ }
+
+ printk(UM_KERN_INFO "vde backend - connection opened\n");
+
+ pri->conn = conn;
+
+ return 0;
+}
+
+static int vde_user_open(void *data)
+{
+ struct vde_data *pri = data;
+
+ if (pri->conn != NULL)
+ return vde_datafd(pri->conn);
+
+ printk(UM_KERN_WARNING "vde_open - we have no VDECONN to open");
+ return -EINVAL;
+}
+
+static void vde_remove(void *data)
+{
+ struct vde_data *pri = data;
+
+ if (pri->conn != NULL) {
+ printk(UM_KERN_INFO "vde backend - closing connection\n");
+ vde_close(pri->conn);
+ pri->conn = NULL;
+ kfree(pri->args);
+ pri->args = NULL;
+ return;
+ }
+
+ printk(UM_KERN_WARNING "vde_remove - we have no VDECONN to remove");
+}
+
+const struct net_user_info vde_user_info = {
+ .init = vde_user_init,
+ .open = vde_user_open,
+ .close = NULL,
+ .remove = vde_remove,
+ .add_address = NULL,
+ .delete_address = NULL,
+ .mtu = ETH_MAX_PACKET,
+ .max_packet = ETH_MAX_PACKET + ETH_HEADER_OTHER,
+};
+
+void vde_init_libstuff(struct vde_data *vpri, struct vde_init *init)
+{
+ struct vde_open_args *args;
+
+ vpri->args = uml_kmalloc(sizeof(struct vde_open_args), UM_GFP_KERNEL);
+ if (vpri->args == NULL) {
+ printk(UM_KERN_ERR "vde_init_libstuff - vde_open_args "
+ "allocation failed");
+ return;
+ }
+
+ args = vpri->args;
+
+ args->port = init->port;
+ args->group = init->group;
+ args->mode = init->mode ? init->mode : 0700;
+
+ args->port ? printk("port %d", args->port) :
+ printk("undefined port");
+}
+
+int vde_user_read(void *conn, void *buf, int len)
+{
+ VDECONN *vconn = conn;
+ int rv;
+
+ if (vconn == NULL)
+ return 0;
+
+ rv = vde_recv(vconn, buf, len, 0);
+ if (rv < 0) {
+ if (errno == EAGAIN)
+ return 0;
+ return -errno;
+ }
+ else if (rv == 0)
+ return -ENOTCONN;
+
+ return rv;
+}
+
+int vde_user_write(void *conn, void *buf, int len)
+{
+ VDECONN *vconn = conn;
+
+ if (vconn == NULL)
+ return 0;
+
+ return vde_send(vconn, buf, len, 0);
+}
+
diff --git a/arch/um/drivers/xterm.c b/arch/um/drivers/xterm.c
new file mode 100644
index 00000000000..969110e5648
--- /dev/null
+++ b/arch/um/drivers/xterm.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <termios.h>
+#include "chan_user.h"
+#include "os.h"
+#include "um_malloc.h"
+#include "xterm.h"
+
+struct xterm_chan {
+ int pid;
+ int helper_pid;
+ char *title;
+ int device;
+ int raw;
+ struct termios tt;
+};
+
+static void *xterm_init(char *str, int device, const struct chan_opts *opts)
+{
+ struct xterm_chan *data;
+
+ data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
+ if (data == NULL)
+ return NULL;
+ *data = ((struct xterm_chan) { .pid = -1,
+ .helper_pid = -1,
+ .device = device,
+ .title = opts->xterm_title,
+ .raw = opts->raw } );
+ return data;
+}
+
+/* Only changed by xterm_setup, which is a setup */
+static char *terminal_emulator = "xterm";
+static char *title_switch = "-T";
+static char *exec_switch = "-e";
+
+static int __init xterm_setup(char *line, int *add)
+{
+ *add = 0;
+ terminal_emulator = line;
+
+ line = strchr(line, ',');
+ if (line == NULL)
+ return 0;
+
+ *line++ = '\0';
+ if (*line)
+ title_switch = line;
+
+ line = strchr(line, ',');
+ if (line == NULL)
+ return 0;
+
+ *line++ = '\0';
+ if (*line)
+ exec_switch = line;
+
+ return 0;
+}
+
+__uml_setup("xterm=", xterm_setup,
+"xterm=<terminal emulator>,<title switch>,<exec switch>\n"
+" Specifies an alternate terminal emulator to use for the debugger,\n"
+" consoles, and serial lines when they are attached to the xterm channel.\n"
+" The values are the terminal emulator binary, the switch it uses to set\n"
+" its title, and the switch it uses to execute a subprocess,\n"
+" respectively. The title switch must have the form '<switch> title',\n"
+" not '<switch>=title'. Similarly, the exec switch must have the form\n"
+" '<switch> command arg1 arg2 ...'.\n"
+" The default values are 'xterm=xterm,-T,-e'. Values for gnome-terminal\n"
+" are 'xterm=gnome-terminal,-t,-x'.\n\n"
+);
+
+static int xterm_open(int input, int output, int primary, void *d,
+ char **dev_out)
+{
+ struct xterm_chan *data = d;
+ int pid, fd, new, err;
+ char title[256], file[] = "/tmp/xterm-pipeXXXXXX";
+ char *argv[] = { terminal_emulator, title_switch, title, exec_switch,
+ OS_LIB_PATH "/uml/port-helper", "-uml-socket",
+ file, NULL };
+
+ if (access(argv[4], X_OK) < 0)
+ argv[4] = "port-helper";
+
+ /*
+ * Check that DISPLAY is set, this doesn't guarantee the xterm
+ * will work but w/o it we can be pretty sure it won't.
+ */
+ if (getenv("DISPLAY") == NULL) {
+ printk(UM_KERN_ERR "xterm_open: $DISPLAY not set.\n");
+ return -ENODEV;
+ }
+
+ /*
+ * This business of getting a descriptor to a temp file,
+ * deleting the file and closing the descriptor is just to get
+ * a known-unused name for the Unix socket that we really
+ * want.
+ */
+ fd = mkstemp(file);
+ if (fd < 0) {
+ err = -errno;
+ printk(UM_KERN_ERR "xterm_open : mkstemp failed, errno = %d\n",
+ errno);
+ return err;
+ }
+
+ if (unlink(file)) {
+ err = -errno;
+ printk(UM_KERN_ERR "xterm_open : unlink failed, errno = %d\n",
+ errno);
+ close(fd);
+ return err;
+ }
+ close(fd);
+
+ fd = os_create_unix_socket(file, sizeof(file), 1);
+ if (fd < 0) {
+ printk(UM_KERN_ERR "xterm_open : create_unix_socket failed, "
+ "errno = %d\n", -fd);
+ return fd;
+ }
+
+ sprintf(title, data->title, data->device);
+ pid = run_helper(NULL, NULL, argv);
+ if (pid < 0) {
+ err = pid;
+ printk(UM_KERN_ERR "xterm_open : run_helper failed, "
+ "errno = %d\n", -err);
+ goto out_close1;
+ }
+
+ err = os_set_fd_block(fd, 0);
+ if (err < 0) {
+ printk(UM_KERN_ERR "xterm_open : failed to set descriptor "
+ "non-blocking, err = %d\n", -err);
+ goto out_kill;
+ }
+
+ new = xterm_fd(fd, &data->helper_pid);
+ if (new < 0) {
+ err = new;
+ printk(UM_KERN_ERR "xterm_open : os_rcv_fd failed, err = %d\n",
+ -err);
+ goto out_kill;
+ }
+
+ err = os_set_fd_block(new, 0);
+ if (err) {
+ printk(UM_KERN_ERR "xterm_open : failed to set xterm "
+ "descriptor non-blocking, err = %d\n", -err);
+ goto out_close2;
+ }
+
+ CATCH_EINTR(err = tcgetattr(new, &data->tt));
+ if (err) {
+ new = err;
+ goto out_close2;
+ }
+
+ if (data->raw) {
+ err = raw(new);
+ if (err) {
+ new = err;
+ goto out_close2;
+ }
+ }
+
+ unlink(file);
+ data->pid = pid;
+ *dev_out = NULL;
+
+ return new;
+
+ out_close2:
+ close(new);
+ out_kill:
+ os_kill_process(pid, 1);
+ out_close1:
+ close(fd);
+
+ return err;
+}
+
+static void xterm_close(int fd, void *d)
+{
+ struct xterm_chan *data = d;
+
+ if (data->pid != -1)
+ os_kill_process(data->pid, 1);
+ data->pid = -1;
+
+ if (data->helper_pid != -1)
+ os_kill_process(data->helper_pid, 0);
+ data->helper_pid = -1;
+
+ os_close_file(fd);
+}
+
+const struct chan_ops xterm_ops = {
+ .type = "xterm",
+ .init = xterm_init,
+ .open = xterm_open,
+ .close = xterm_close,
+ .read = generic_read,
+ .write = generic_write,
+ .console_write = generic_console_write,
+ .window_size = generic_window_size,
+ .free = generic_free,
+ .winch = 1,
+};
diff --git a/arch/um/drivers/xterm.h b/arch/um/drivers/xterm.h
new file mode 100644
index 00000000000..56b9c4aba42
--- /dev/null
+++ b/arch/um/drivers/xterm.h
@@ -0,0 +1,12 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __XTERM_H__
+#define __XTERM_H__
+
+extern int xterm_fd(int socket, int *pid_out);
+
+#endif
+
diff --git a/arch/um/drivers/xterm_kern.c b/arch/um/drivers/xterm_kern.c
new file mode 100644
index 00000000000..b646bccef37
--- /dev/null
+++ b/arch/um/drivers/xterm_kern.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <linux/irqreturn.h>
+#include <asm/irq.h>
+#include "irq_kern.h"
+#include "os.h"
+
+struct xterm_wait {
+ struct completion ready;
+ int fd;
+ int pid;
+ int new_fd;
+};
+
+static irqreturn_t xterm_interrupt(int irq, void *data)
+{
+ struct xterm_wait *xterm = data;
+ int fd;
+
+ fd = os_rcv_fd(xterm->fd, &xterm->pid);
+ if (fd == -EAGAIN)
+ return IRQ_NONE;
+
+ xterm->new_fd = fd;
+ complete(&xterm->ready);
+
+ return IRQ_HANDLED;
+}
+
+int xterm_fd(int socket, int *pid_out)
+{
+ struct xterm_wait *data;
+ int err, ret;
+
+ data = kmalloc(sizeof(*data), GFP_KERNEL);
+ if (data == NULL) {
+ printk(KERN_ERR "xterm_fd : failed to allocate xterm_wait\n");
+ return -ENOMEM;
+ }
+
+ /* This is a locked semaphore... */
+ *data = ((struct xterm_wait) { .fd = socket,
+ .pid = -1,
+ .new_fd = -1 });
+ init_completion(&data->ready);
+
+ err = um_request_irq(XTERM_IRQ, socket, IRQ_READ, xterm_interrupt,
+ IRQF_DISABLED | IRQF_SHARED | IRQF_SAMPLE_RANDOM,
+ "xterm", data);
+ if (err) {
+ printk(KERN_ERR "xterm_fd : failed to get IRQ for xterm, "
+ "err = %d\n", err);
+ ret = err;
+ goto out;
+ }
+
+ /* ... so here we wait for an xterm interrupt.
+ *
+ * XXX Note, if the xterm doesn't work for some reason (eg. DISPLAY
+ * isn't set) this will hang... */
+ wait_for_completion(&data->ready);
+
+ free_irq(XTERM_IRQ, data);
+
+ ret = data->new_fd;
+ *pid_out = data->pid;
+ out:
+ kfree(data);
+
+ return ret;
+}
diff --git a/arch/um/include/asm/Kbuild b/arch/um/include/asm/Kbuild
new file mode 100644
index 00000000000..451f4517b33
--- /dev/null
+++ b/arch/um/include/asm/Kbuild
@@ -0,0 +1,3 @@
+generic-y += bug.h cputime.h device.h emergency-restart.h futex.h hardirq.h
+generic-y += hw_irq.h irq_regs.h kdebug.h percpu.h sections.h topology.h xor.h
+generic-y += ftrace.h
diff --git a/arch/um/include/asm/a.out-core.h b/arch/um/include/asm/a.out-core.h
new file mode 100644
index 00000000000..995643b1830
--- /dev/null
+++ b/arch/um/include/asm/a.out-core.h
@@ -0,0 +1,27 @@
+/* a.out coredump register dumper
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public Licence
+ * as published by the Free Software Foundation; either version
+ * 2 of the Licence, or (at your option) any later version.
+ */
+
+#ifndef __UM_A_OUT_CORE_H
+#define __UM_A_OUT_CORE_H
+
+#ifdef __KERNEL__
+
+#include <linux/user.h>
+
+/*
+ * fill in the user structure for an a.out core dump
+ */
+static inline void aout_dump_thread(struct pt_regs *regs, struct user *u)
+{
+}
+
+#endif /* __KERNEL__ */
+#endif /* __UM_A_OUT_CORE_H */
diff --git a/arch/um/include/asm/asm-offsets.h b/arch/um/include/asm/asm-offsets.h
new file mode 100644
index 00000000000..d370ee36a18
--- /dev/null
+++ b/arch/um/include/asm/asm-offsets.h
@@ -0,0 +1 @@
+#include <generated/asm-offsets.h>
diff --git a/arch/um/include/asm/auxvec.h b/arch/um/include/asm/auxvec.h
new file mode 100644
index 00000000000..1e5e1c2fc9b
--- /dev/null
+++ b/arch/um/include/asm/auxvec.h
@@ -0,0 +1,4 @@
+#ifndef __UM_AUXVEC_H
+#define __UM_AUXVEC_H
+
+#endif
diff --git a/arch/um/include/asm/bugs.h b/arch/um/include/asm/bugs.h
new file mode 100644
index 00000000000..6a72e240d5f
--- /dev/null
+++ b/arch/um/include/asm/bugs.h
@@ -0,0 +1,6 @@
+#ifndef __UM_BUGS_H
+#define __UM_BUGS_H
+
+void check_bugs(void);
+
+#endif
diff --git a/arch/um/include/asm/cache.h b/arch/um/include/asm/cache.h
new file mode 100644
index 00000000000..19e1bdd6741
--- /dev/null
+++ b/arch/um/include/asm/cache.h
@@ -0,0 +1,17 @@
+#ifndef __UM_CACHE_H
+#define __UM_CACHE_H
+
+
+#if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
+# define L1_CACHE_SHIFT (CONFIG_X86_L1_CACHE_SHIFT)
+#elif defined(CONFIG_UML_X86) /* 64-bit */
+# define L1_CACHE_SHIFT 6 /* Should be 7 on Intel */
+#else
+/* XXX: this was taken from x86, now it's completely random. Luckily only
+ * affects SMP padding. */
+# define L1_CACHE_SHIFT 5
+#endif
+
+#define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
+
+#endif
diff --git a/arch/um/include/asm/common.lds.S b/arch/um/include/asm/common.lds.S
new file mode 100644
index 00000000000..4938de5512d
--- /dev/null
+++ b/arch/um/include/asm/common.lds.S
@@ -0,0 +1,108 @@
+#include <asm-generic/vmlinux.lds.h>
+
+ .fini : { *(.fini) } =0x9090
+ _etext = .;
+ PROVIDE (etext = .);
+
+ . = ALIGN(4096);
+ _sdata = .;
+ PROVIDE (sdata = .);
+
+ RODATA
+
+ .unprotected : { *(.unprotected) }
+ . = ALIGN(4096);
+ PROVIDE (_unprotected_end = .);
+
+ . = ALIGN(4096);
+ .note : { *(.note.*) }
+ EXCEPTION_TABLE(0)
+
+ BUG_TABLE
+
+ .uml.setup.init : {
+ __uml_setup_start = .;
+ *(.uml.setup.init)
+ __uml_setup_end = .;
+ }
+
+ .uml.help.init : {
+ __uml_help_start = .;
+ *(.uml.help.init)
+ __uml_help_end = .;
+ }
+
+ .uml.postsetup.init : {
+ __uml_postsetup_start = .;
+ *(.uml.postsetup.init)
+ __uml_postsetup_end = .;
+ }
+
+ .init.setup : {
+ INIT_SETUP(0)
+ }
+
+ PERCPU_SECTION(32)
+
+ .initcall.init : {
+ INIT_CALLS
+ }
+
+ .con_initcall.init : {
+ CON_INITCALL
+ }
+
+ .uml.initcall.init : {
+ __uml_initcall_start = .;
+ *(.uml.initcall.init)
+ __uml_initcall_end = .;
+ }
+ __init_end = .;
+
+ SECURITY_INIT
+
+ .exitcall : {
+ __exitcall_begin = .;
+ *(.exitcall.exit)
+ __exitcall_end = .;
+ }
+
+ .uml.exitcall : {
+ __uml_exitcall_begin = .;
+ *(.uml.exitcall.exit)
+ __uml_exitcall_end = .;
+ }
+
+ . = ALIGN(4);
+ .altinstructions : {
+ __alt_instructions = .;
+ *(.altinstructions)
+ __alt_instructions_end = .;
+ }
+ .altinstr_replacement : { *(.altinstr_replacement) }
+ /* .exit.text is discard at runtime, not link time, to deal with references
+ from .altinstructions and .eh_frame */
+ .exit.text : { *(.exit.text) }
+ .exit.data : { *(.exit.data) }
+
+ .preinit_array : {
+ __preinit_array_start = .;
+ *(.preinit_array)
+ __preinit_array_end = .;
+ }
+ .init_array : {
+ __init_array_start = .;
+ *(.init_array)
+ __init_array_end = .;
+ }
+ .fini_array : {
+ __fini_array_start = .;
+ *(.fini_array)
+ __fini_array_end = .;
+ }
+
+ . = ALIGN(4096);
+ .init.ramfs : {
+ INIT_RAM_FS
+ }
+
diff --git a/arch/um/include/asm/current.h b/arch/um/include/asm/current.h
new file mode 100644
index 00000000000..c2191d9aa03
--- /dev/null
+++ b/arch/um/include/asm/current.h
@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_CURRENT_H
+#define __UM_CURRENT_H
+
+#include "linux/thread_info.h"
+
+#define current (current_thread_info()->task)
+
+#endif
diff --git a/arch/um/include/asm/delay.h b/arch/um/include/asm/delay.h
new file mode 100644
index 00000000000..8a5576d8eda
--- /dev/null
+++ b/arch/um/include/asm/delay.h
@@ -0,0 +1,18 @@
+#ifndef __UM_DELAY_H
+#define __UM_DELAY_H
+
+/* Undefined on purpose */
+extern void __bad_udelay(void);
+extern void __bad_ndelay(void);
+
+extern void __udelay(unsigned long usecs);
+extern void __ndelay(unsigned long usecs);
+extern void __delay(unsigned long loops);
+
+#define udelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
+ __bad_udelay() : __udelay(n))
+
+#define ndelay(n) ((__builtin_constant_p(n) && (n) > 20000) ? \
+ __bad_ndelay() : __ndelay(n))
+
+#endif
diff --git a/arch/um/include/asm/dma.h b/arch/um/include/asm/dma.h
new file mode 100644
index 00000000000..9f6139a8a52
--- /dev/null
+++ b/arch/um/include/asm/dma.h
@@ -0,0 +1,10 @@
+#ifndef __UM_DMA_H
+#define __UM_DMA_H
+
+#include "asm/io.h"
+
+extern unsigned long uml_physmem;
+
+#define MAX_DMA_ADDRESS (uml_physmem)
+
+#endif
diff --git a/arch/um/include/asm/fixmap.h b/arch/um/include/asm/fixmap.h
new file mode 100644
index 00000000000..69c0252345f
--- /dev/null
+++ b/arch/um/include/asm/fixmap.h
@@ -0,0 +1,99 @@
+#ifndef __UM_FIXMAP_H
+#define __UM_FIXMAP_H
+
+#include <asm/processor.h>
+#include <asm/system.h>
+#include <asm/kmap_types.h>
+#include <asm/archparam.h>
+#include <asm/page.h>
+#include <linux/threads.h>
+
+/*
+ * Here we define all the compile-time 'special' virtual
+ * addresses. The point is to have a constant address at
+ * compile time, but to set the physical address only
+ * in the boot process. We allocate these special addresses
+ * from the end of virtual memory (0xfffff000) backwards.
+ * Also this lets us do fail-safe vmalloc(), we
+ * can guarantee that these special addresses and
+ * vmalloc()-ed addresses never overlap.
+ *
+ * these 'compile-time allocated' memory buffers are
+ * fixed-size 4k pages. (or larger if used with an increment
+ * highger than 1) use fixmap_set(idx,phys) to associate
+ * physical memory with fixmap indices.
+ *
+ * TLB entries of such buffers will not be flushed across
+ * task switches.
+ */
+
+/*
+ * on UP currently we will have no trace of the fixmap mechanizm,
+ * no page table allocations, etc. This might change in the
+ * future, say framebuffers for the console driver(s) could be
+ * fix-mapped?
+ */
+enum fixed_addresses {
+#ifdef CONFIG_HIGHMEM
+ FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */
+ FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
+#endif
+ __end_of_fixed_addresses
+};
+
+extern void __set_fixmap (enum fixed_addresses idx,
+ unsigned long phys, pgprot_t flags);
+
+#define set_fixmap(idx, phys) \
+ __set_fixmap(idx, phys, PAGE_KERNEL)
+/*
+ * Some hardware wants to get fixmapped without caching.
+ */
+#define set_fixmap_nocache(idx, phys) \
+ __set_fixmap(idx, phys, PAGE_KERNEL_NOCACHE)
+/*
+ * used by vmalloc.c.
+ *
+ * Leave one empty page between vmalloc'ed areas and
+ * the start of the fixmap, and leave one page empty
+ * at the top of mem..
+ */
+
+#define FIXADDR_TOP (TASK_SIZE - 2 * PAGE_SIZE)
+#define FIXADDR_SIZE (__end_of_fixed_addresses << PAGE_SHIFT)
+#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)
+
+#define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT))
+#define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT)
+
+extern void __this_fixmap_does_not_exist(void);
+
+/*
+ * 'index to address' translation. If anyone tries to use the idx
+ * directly without tranlation, we catch the bug with a NULL-deference
+ * kernel oops. Illegal ranges of incoming indices are caught too.
+ */
+static inline unsigned long fix_to_virt(const unsigned int idx)
+{
+ /*
+ * this branch gets completely eliminated after inlining,
+ * except when someone tries to use fixaddr indices in an
+ * illegal way. (such as mixing up address types or using
+ * out-of-range indices).
+ *
+ * If it doesn't get removed, the linker will complain
+ * loudly with a reasonably clear error message..
+ */
+ if (idx >= __end_of_fixed_addresses)
+ __this_fixmap_does_not_exist();
+
+ return __fix_to_virt(idx);
+}
+
+static inline unsigned long virt_to_fix(const unsigned long vaddr)
+{
+ BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START);
+ return __virt_to_fix(vaddr);
+}
+
+#endif
diff --git a/arch/um/include/asm/io.h b/arch/um/include/asm/io.h
new file mode 100644
index 00000000000..44e8b8c772a
--- /dev/null
+++ b/arch/um/include/asm/io.h
@@ -0,0 +1,57 @@
+#ifndef __UM_IO_H
+#define __UM_IO_H
+
+#include "asm/page.h"
+
+#define IO_SPACE_LIMIT 0xdeadbeef /* Sure hope nothing uses this */
+
+static inline int inb(unsigned long i) { return(0); }
+static inline void outb(char c, unsigned long i) { }
+
+/*
+ * Change virtual addresses to physical addresses and vv.
+ * These are pretty trivial
+ */
+static inline unsigned long virt_to_phys(volatile void * address)
+{
+ return __pa((void *) address);
+}
+
+static inline void * phys_to_virt(unsigned long address)
+{
+ return __va(address);
+}
+
+/*
+ * Convert a physical pointer to a virtual kernel pointer for /dev/mem
+ * access
+ */
+#define xlate_dev_mem_ptr(p) __va(p)
+
+/*
+ * Convert a virtual cached pointer to an uncached pointer
+ */
+#define xlate_dev_kmem_ptr(p) p
+
+static inline void writeb(unsigned char b, volatile void __iomem *addr)
+{
+ *(volatile unsigned char __force *) addr = b;
+}
+static inline void writew(unsigned short b, volatile void __iomem *addr)
+{
+ *(volatile unsigned short __force *) addr = b;
+}
+static inline void writel(unsigned int b, volatile void __iomem *addr)
+{
+ *(volatile unsigned int __force *) addr = b;
+}
+static inline void writeq(unsigned int b, volatile void __iomem *addr)
+{
+ *(volatile unsigned long long __force *) addr = b;
+}
+#define __raw_writeb writeb
+#define __raw_writew writew
+#define __raw_writel writel
+#define __raw_writeq writeq
+
+#endif
diff --git a/arch/um/include/asm/irq.h b/arch/um/include/asm/irq.h
new file mode 100644
index 00000000000..4a2037f8204
--- /dev/null
+++ b/arch/um/include/asm/irq.h
@@ -0,0 +1,23 @@
+#ifndef __UM_IRQ_H
+#define __UM_IRQ_H
+
+#define TIMER_IRQ 0
+#define UMN_IRQ 1
+#define CONSOLE_IRQ 2
+#define CONSOLE_WRITE_IRQ 3
+#define UBD_IRQ 4
+#define UM_ETH_IRQ 5
+#define SSL_IRQ 6
+#define SSL_WRITE_IRQ 7
+#define ACCEPT_IRQ 8
+#define MCONSOLE_IRQ 9
+#define WINCH_IRQ 10
+#define SIGIO_WRITE_IRQ 11
+#define TELNETD_IRQ 12
+#define XTERM_IRQ 13
+#define RANDOM_IRQ 14
+
+#define LAST_IRQ RANDOM_IRQ
+#define NR_IRQS (LAST_IRQ + 1)
+
+#endif
diff --git a/arch/um/include/asm/irqflags.h b/arch/um/include/asm/irqflags.h
new file mode 100644
index 00000000000..c780d8a1677
--- /dev/null
+++ b/arch/um/include/asm/irqflags.h
@@ -0,0 +1,42 @@
+#ifndef __UM_IRQFLAGS_H
+#define __UM_IRQFLAGS_H
+
+extern int get_signals(void);
+extern int set_signals(int enable);
+extern void block_signals(void);
+extern void unblock_signals(void);
+
+static inline unsigned long arch_local_save_flags(void)
+{
+ return get_signals();
+}
+
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+ set_signals(flags);
+}
+
+static inline void arch_local_irq_enable(void)
+{
+ unblock_signals();
+}
+
+static inline void arch_local_irq_disable(void)
+{
+ block_signals();
+}
+
+static inline unsigned long arch_local_irq_save(void)
+{
+ unsigned long flags;
+ flags = arch_local_save_flags();
+ arch_local_irq_disable();
+ return flags;
+}
+
+static inline bool arch_irqs_disabled(void)
+{
+ return arch_local_save_flags() == 0;
+}
+
+#endif
diff --git a/arch/um/include/asm/kmap_types.h b/arch/um/include/asm/kmap_types.h
new file mode 100644
index 00000000000..6c03acdb440
--- /dev/null
+++ b/arch/um/include/asm/kmap_types.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_KMAP_TYPES_H
+#define __UM_KMAP_TYPES_H
+
+/* No more #include "asm/arch/kmap_types.h" ! */
+
+enum km_type {
+ KM_BOUNCE_READ,
+ KM_SKB_SUNRPC_DATA,
+ KM_SKB_DATA_SOFTIRQ,
+ KM_USER0,
+ KM_USER1,
+ KM_UML_USERCOPY, /* UML specific, for copy_*_user - used in do_op_one_page */
+ KM_BIO_SRC_IRQ,
+ KM_BIO_DST_IRQ,
+ KM_PTE0,
+ KM_PTE1,
+ KM_IRQ0,
+ KM_IRQ1,
+ KM_SOFTIRQ0,
+ KM_SOFTIRQ1,
+ KM_TYPE_NR
+};
+
+#endif
diff --git a/arch/um/include/asm/mmu.h b/arch/um/include/asm/mmu.h
new file mode 100644
index 00000000000..30509b9f37f
--- /dev/null
+++ b/arch/um/include/asm/mmu.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __ARCH_UM_MMU_H
+#define __ARCH_UM_MMU_H
+
+#include "mm_id.h"
+#include <asm/mm_context.h>
+
+typedef struct mm_context {
+ struct mm_id id;
+ struct uml_arch_mm_context arch;
+ struct page **stub_pages;
+} mm_context_t;
+
+extern void __switch_mm(struct mm_id * mm_idp);
+
+/* Avoid tangled inclusion with asm/ldt.h */
+extern long init_new_ldt(struct mm_context *to_mm, struct mm_context *from_mm);
+extern void free_ldt(struct mm_context *mm);
+
+#endif
diff --git a/arch/um/include/asm/mmu_context.h b/arch/um/include/asm/mmu_context.h
new file mode 100644
index 00000000000..591b3d8d761
--- /dev/null
+++ b/arch/um/include/asm/mmu_context.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_MMU_CONTEXT_H
+#define __UM_MMU_CONTEXT_H
+
+#include <linux/sched.h>
+#include <asm/mmu.h>
+
+extern void arch_dup_mmap(struct mm_struct *oldmm, struct mm_struct *mm);
+extern void arch_exit_mmap(struct mm_struct *mm);
+
+#define deactivate_mm(tsk,mm) do { } while (0)
+
+extern void force_flush_all(void);
+
+static inline void activate_mm(struct mm_struct *old, struct mm_struct *new)
+{
+ /*
+ * This is called by fs/exec.c and sys_unshare()
+ * when the new ->mm is used for the first time.
+ */
+ __switch_mm(&new->context.id);
+ arch_dup_mmap(old, new);
+}
+
+static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
+ struct task_struct *tsk)
+{
+ unsigned cpu = smp_processor_id();
+
+ if(prev != next){
+ cpumask_clear_cpu(cpu, mm_cpumask(prev));
+ cpumask_set_cpu(cpu, mm_cpumask(next));
+ if(next != &init_mm)
+ __switch_mm(&next->context.id);
+ }
+}
+
+static inline void enter_lazy_tlb(struct mm_struct *mm,
+ struct task_struct *tsk)
+{
+}
+
+extern int init_new_context(struct task_struct *task, struct mm_struct *mm);
+
+extern void destroy_context(struct mm_struct *mm);
+
+#endif
diff --git a/arch/um/include/asm/mutex.h b/arch/um/include/asm/mutex.h
new file mode 100644
index 00000000000..458c1f7fbc1
--- /dev/null
+++ b/arch/um/include/asm/mutex.h
@@ -0,0 +1,9 @@
+/*
+ * Pull in the generic implementation for the mutex fastpath.
+ *
+ * TODO: implement optimized primitives instead, or leave the generic
+ * implementation in place, or pick the atomic_xchg() based generic
+ * implementation. (see asm-generic/mutex-xchg.h for details)
+ */
+
+#include <asm-generic/mutex-dec.h>
diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h
new file mode 100644
index 00000000000..7cfc3cedce8
--- /dev/null
+++ b/arch/um/include/asm/page.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright 2003 PathScale, Inc.
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PAGE_H
+#define __UM_PAGE_H
+
+#include <linux/const.h>
+
+/* PAGE_SHIFT determines the page size */
+#define PAGE_SHIFT 12
+#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+#ifndef __ASSEMBLY__
+
+struct page;
+
+#include <linux/types.h>
+#include <asm/vm-flags.h>
+
+/*
+ * These are used to make use of C type-checking..
+ */
+
+#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
+#define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE)
+
+#define clear_user_page(page, vaddr, pg) clear_page(page)
+#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
+
+#if defined(CONFIG_3_LEVEL_PGTABLES) && !defined(CONFIG_64BIT)
+
+typedef struct { unsigned long pte_low, pte_high; } pte_t;
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+#define pte_val(x) ((x).pte_low | ((unsigned long long) (x).pte_high << 32))
+
+#define pte_get_bits(pte, bits) ((pte).pte_low & (bits))
+#define pte_set_bits(pte, bits) ((pte).pte_low |= (bits))
+#define pte_clear_bits(pte, bits) ((pte).pte_low &= ~(bits))
+#define pte_copy(to, from) ({ (to).pte_high = (from).pte_high; \
+ smp_wmb(); \
+ (to).pte_low = (from).pte_low; })
+#define pte_is_zero(pte) (!((pte).pte_low & ~_PAGE_NEWPAGE) && !(pte).pte_high)
+#define pte_set_val(pte, phys, prot) \
+ ({ (pte).pte_high = (phys) >> 32; \
+ (pte).pte_low = (phys) | pgprot_val(prot); })
+
+#define pmd_val(x) ((x).pmd)
+#define __pmd(x) ((pmd_t) { (x) } )
+
+typedef unsigned long long pfn_t;
+typedef unsigned long long phys_t;
+
+#else
+
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pgd; } pgd_t;
+
+#ifdef CONFIG_3_LEVEL_PGTABLES
+typedef struct { unsigned long pmd; } pmd_t;
+#define pmd_val(x) ((x).pmd)
+#define __pmd(x) ((pmd_t) { (x) } )
+#endif
+
+#define pte_val(x) ((x).pte)
+
+
+#define pte_get_bits(p, bits) ((p).pte & (bits))
+#define pte_set_bits(p, bits) ((p).pte |= (bits))
+#define pte_clear_bits(p, bits) ((p).pte &= ~(bits))
+#define pte_copy(to, from) ((to).pte = (from).pte)
+#define pte_is_zero(p) (!((p).pte & ~_PAGE_NEWPAGE))
+#define pte_set_val(p, phys, prot) (p).pte = (phys | pgprot_val(prot))
+
+typedef unsigned long pfn_t;
+typedef unsigned long phys_t;
+
+#endif
+
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+typedef struct page *pgtable_t;
+
+#define pgd_val(x) ((x).pgd)
+#define pgprot_val(x) ((x).pgprot)
+
+#define __pte(x) ((pte_t) { (x) } )
+#define __pgd(x) ((pgd_t) { (x) } )
+#define __pgprot(x) ((pgprot_t) { (x) } )
+
+extern unsigned long uml_physmem;
+
+#define PAGE_OFFSET (uml_physmem)
+#define KERNELBASE PAGE_OFFSET
+
+#define __va_space (8*1024*1024)
+
+#include "mem.h"
+
+/* Cast to unsigned long before casting to void * to avoid a warning from
+ * mmap_kmem about cutting a long long down to a void *. Not sure that
+ * casting is the right thing, but 32-bit UML can't have 64-bit virtual
+ * addresses
+ */
+#define __pa(virt) to_phys((void *) (unsigned long) (virt))
+#define __va(phys) to_virt((unsigned long) (phys))
+
+#define phys_to_pfn(p) ((pfn_t) ((p) >> PAGE_SHIFT))
+#define pfn_to_phys(pfn) ((phys_t) ((pfn) << PAGE_SHIFT))
+
+#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#define virt_addr_valid(v) pfn_valid(phys_to_pfn(__pa(v)))
+
+#include <asm-generic/memory_model.h>
+#include <asm-generic/getorder.h>
+
+#endif /* __ASSEMBLY__ */
+#endif /* __UM_PAGE_H */
diff --git a/arch/um/include/asm/param.h b/arch/um/include/asm/param.h
new file mode 100644
index 00000000000..e44f4e60d16
--- /dev/null
+++ b/arch/um/include/asm/param.h
@@ -0,0 +1,20 @@
+#ifndef _UM_PARAM_H
+#define _UM_PARAM_H
+
+#define EXEC_PAGESIZE 4096
+
+#ifndef NOGROUP
+#define NOGROUP (-1)
+#endif
+
+#define MAXHOSTNAMELEN 64 /* max length of hostname */
+
+#ifdef __KERNEL__
+#define HZ CONFIG_HZ
+#define USER_HZ 100 /* .. some user interfaces are in "ticks" */
+#define CLOCKS_PER_SEC (USER_HZ) /* frequency at which times() counts */
+#else
+#define HZ 100
+#endif
+
+#endif
diff --git a/arch/um/include/asm/pci.h b/arch/um/include/asm/pci.h
new file mode 100644
index 00000000000..b44cf59ede1
--- /dev/null
+++ b/arch/um/include/asm/pci.h
@@ -0,0 +1,6 @@
+#ifndef __UM_PCI_H
+#define __UM_PCI_H
+
+#define PCI_DMA_BUS_IS_PHYS (1)
+
+#endif
diff --git a/arch/um/include/asm/pgalloc.h b/arch/um/include/asm/pgalloc.h
new file mode 100644
index 00000000000..32c8ce4e151
--- /dev/null
+++ b/arch/um/include/asm/pgalloc.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright 2003 PathScale, Inc.
+ * Derived from include/asm-i386/pgalloc.h and include/asm-i386/pgtable.h
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PGALLOC_H
+#define __UM_PGALLOC_H
+
+#include "linux/mm.h"
+#include "asm/fixmap.h"
+
+#define pmd_populate_kernel(mm, pmd, pte) \
+ set_pmd(pmd, __pmd(_PAGE_TABLE + (unsigned long) __pa(pte)))
+
+#define pmd_populate(mm, pmd, pte) \
+ set_pmd(pmd, __pmd(_PAGE_TABLE + \
+ ((unsigned long long)page_to_pfn(pte) << \
+ (unsigned long long) PAGE_SHIFT)))
+#define pmd_pgtable(pmd) pmd_page(pmd)
+
+/*
+ * Allocate and free page tables.
+ */
+extern pgd_t *pgd_alloc(struct mm_struct *);
+extern void pgd_free(struct mm_struct *mm, pgd_t *pgd);
+
+extern pte_t *pte_alloc_one_kernel(struct mm_struct *, unsigned long);
+extern pgtable_t pte_alloc_one(struct mm_struct *, unsigned long);
+
+static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
+{
+ free_page((unsigned long) pte);
+}
+
+static inline void pte_free(struct mm_struct *mm, pgtable_t pte)
+{
+ pgtable_page_dtor(pte);
+ __free_page(pte);
+}
+
+#define __pte_free_tlb(tlb,pte, address) \
+do { \
+ pgtable_page_dtor(pte); \
+ tlb_remove_page((tlb),(pte)); \
+} while (0)
+
+#ifdef CONFIG_3_LEVEL_PGTABLES
+
+static inline void pmd_free(struct mm_struct *mm, pmd_t *pmd)
+{
+ free_page((unsigned long)pmd);
+}
+
+#define __pmd_free_tlb(tlb,x, address) tlb_remove_page((tlb),virt_to_page(x))
+#endif
+
+#define check_pgt_cache() do { } while (0)
+
+#endif
+
diff --git a/arch/um/include/asm/pgtable-2level.h b/arch/um/include/asm/pgtable-2level.h
new file mode 100644
index 00000000000..f534b73e753
--- /dev/null
+++ b/arch/um/include/asm/pgtable-2level.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Copyright 2003 PathScale, Inc.
+ * Derived from include/asm-i386/pgtable.h
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PGTABLE_2LEVEL_H
+#define __UM_PGTABLE_2LEVEL_H
+
+#include <asm-generic/pgtable-nopmd.h>
+
+/* PGDIR_SHIFT determines what a third-level page table entry can map */
+
+#define PGDIR_SHIFT 22
+#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+/*
+ * entries per page directory level: the i386 is two-level, so
+ * we don't really have any PMD directory physically.
+ */
+#define PTRS_PER_PTE 1024
+#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
+#define PTRS_PER_PGD 1024
+#define FIRST_USER_ADDRESS 0
+
+#define pte_ERROR(e) \
+ printk("%s:%d: bad pte %p(%08lx).\n", __FILE__, __LINE__, &(e), \
+ pte_val(e))
+#define pgd_ERROR(e) \
+ printk("%s:%d: bad pgd %p(%08lx).\n", __FILE__, __LINE__, &(e), \
+ pgd_val(e))
+
+static inline int pgd_newpage(pgd_t pgd) { return 0; }
+static inline void pgd_mkuptodate(pgd_t pgd) { }
+
+#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
+
+#define pte_pfn(x) phys_to_pfn(pte_val(x))
+#define pfn_pte(pfn, prot) __pte(pfn_to_phys(pfn) | pgprot_val(prot))
+#define pfn_pmd(pfn, prot) __pmd(pfn_to_phys(pfn) | pgprot_val(prot))
+
+/*
+ * Bits 0 through 4 are taken
+ */
+#define PTE_FILE_MAX_BITS 27
+
+#define pte_to_pgoff(pte) (pte_val(pte) >> 5)
+
+#define pgoff_to_pte(off) ((pte_t) { ((off) << 5) + _PAGE_FILE })
+
+#endif
diff --git a/arch/um/include/asm/pgtable-3level.h b/arch/um/include/asm/pgtable-3level.h
new file mode 100644
index 00000000000..0032f9212e7
--- /dev/null
+++ b/arch/um/include/asm/pgtable-3level.h
@@ -0,0 +1,136 @@
+/*
+ * Copyright 2003 PathScale Inc
+ * Derived from include/asm-i386/pgtable.h
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PGTABLE_3LEVEL_H
+#define __UM_PGTABLE_3LEVEL_H
+
+#include <asm-generic/pgtable-nopud.h>
+
+/* PGDIR_SHIFT determines what a third-level page table entry can map */
+
+#ifdef CONFIG_64BIT
+#define PGDIR_SHIFT 30
+#else
+#define PGDIR_SHIFT 31
+#endif
+#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+/* PMD_SHIFT determines the size of the area a second-level page table can
+ * map
+ */
+
+#define PMD_SHIFT 21
+#define PMD_SIZE (1UL << PMD_SHIFT)
+#define PMD_MASK (~(PMD_SIZE-1))
+
+/*
+ * entries per page directory level
+ */
+
+#define PTRS_PER_PTE 512
+#ifdef CONFIG_64BIT
+#define PTRS_PER_PMD 512
+#define PTRS_PER_PGD 512
+#else
+#define PTRS_PER_PMD 1024
+#define PTRS_PER_PGD 1024
+#endif
+
+#define USER_PTRS_PER_PGD ((TASK_SIZE + (PGDIR_SIZE - 1)) / PGDIR_SIZE)
+#define FIRST_USER_ADDRESS 0
+
+#define pte_ERROR(e) \
+ printk("%s:%d: bad pte %p(%016lx).\n", __FILE__, __LINE__, &(e), \
+ pte_val(e))
+#define pmd_ERROR(e) \
+ printk("%s:%d: bad pmd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
+ pmd_val(e))
+#define pgd_ERROR(e) \
+ printk("%s:%d: bad pgd %p(%016lx).\n", __FILE__, __LINE__, &(e), \
+ pgd_val(e))
+
+#define pud_none(x) (!(pud_val(x) & ~_PAGE_NEWPAGE))
+#define pud_bad(x) ((pud_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
+#define pud_present(x) (pud_val(x) & _PAGE_PRESENT)
+#define pud_populate(mm, pud, pmd) \
+ set_pud(pud, __pud(_PAGE_TABLE + __pa(pmd)))
+
+#ifdef CONFIG_64BIT
+#define set_pud(pudptr, pudval) set_64bit((u64 *) (pudptr), pud_val(pudval))
+#else
+#define set_pud(pudptr, pudval) (*(pudptr) = (pudval))
+#endif
+
+static inline int pgd_newpage(pgd_t pgd)
+{
+ return(pgd_val(pgd) & _PAGE_NEWPAGE);
+}
+
+static inline void pgd_mkuptodate(pgd_t pgd) { pgd_val(pgd) &= ~_PAGE_NEWPAGE; }
+
+#ifdef CONFIG_64BIT
+#define set_pmd(pmdptr, pmdval) set_64bit((u64 *) (pmdptr), pmd_val(pmdval))
+#else
+#define set_pmd(pmdptr, pmdval) (*(pmdptr) = (pmdval))
+#endif
+
+struct mm_struct;
+extern pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address);
+
+static inline void pud_clear (pud_t *pud)
+{
+ set_pud(pud, __pud(_PAGE_NEWPAGE));
+}
+
+#define pud_page(pud) phys_to_page(pud_val(pud) & PAGE_MASK)
+#define pud_page_vaddr(pud) ((unsigned long) __va(pud_val(pud) & PAGE_MASK))
+
+/* Find an entry in the second-level page table.. */
+#define pmd_offset(pud, address) ((pmd_t *) pud_page_vaddr(*(pud)) + \
+ pmd_index(address))
+
+static inline unsigned long pte_pfn(pte_t pte)
+{
+ return phys_to_pfn(pte_val(pte));
+}
+
+static inline pte_t pfn_pte(pfn_t page_nr, pgprot_t pgprot)
+{
+ pte_t pte;
+ phys_t phys = pfn_to_phys(page_nr);
+
+ pte_set_val(pte, phys, pgprot);
+ return pte;
+}
+
+static inline pmd_t pfn_pmd(pfn_t page_nr, pgprot_t pgprot)
+{
+ return __pmd((page_nr << PAGE_SHIFT) | pgprot_val(pgprot));
+}
+
+/*
+ * Bits 0 through 3 are taken in the low part of the pte,
+ * put the 32 bits of offset into the high part.
+ */
+#define PTE_FILE_MAX_BITS 32
+
+#ifdef CONFIG_64BIT
+
+#define pte_to_pgoff(p) ((p).pte >> 32)
+
+#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE })
+
+#else
+
+#define pte_to_pgoff(pte) ((pte).pte_high)
+
+#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
+
+#endif
+
+#endif
+
diff --git a/arch/um/include/asm/pgtable.h b/arch/um/include/asm/pgtable.h
new file mode 100644
index 00000000000..41474fb5eee
--- /dev/null
+++ b/arch/um/include/asm/pgtable.h
@@ -0,0 +1,369 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright 2003 PathScale, Inc.
+ * Derived from include/asm-i386/pgtable.h
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PGTABLE_H
+#define __UM_PGTABLE_H
+
+#include <asm/fixmap.h>
+
+#define _PAGE_PRESENT 0x001
+#define _PAGE_NEWPAGE 0x002
+#define _PAGE_NEWPROT 0x004
+#define _PAGE_RW 0x020
+#define _PAGE_USER 0x040
+#define _PAGE_ACCESSED 0x080
+#define _PAGE_DIRTY 0x100
+/* If _PAGE_PRESENT is clear, we use these: */
+#define _PAGE_FILE 0x008 /* nonlinear file mapping, saved PTE; unset:swap */
+#define _PAGE_PROTNONE 0x010 /* if the user mapped it with PROT_NONE;
+ pte_present gives true */
+
+#ifdef CONFIG_3_LEVEL_PGTABLES
+#include "asm/pgtable-3level.h"
+#else
+#include "asm/pgtable-2level.h"
+#endif
+
+extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
+/* zero page used for uninitialized stuff */
+extern unsigned long *empty_zero_page;
+
+#define pgtable_cache_init() do ; while (0)
+
+/* Just any arbitrary offset to the start of the vmalloc VM area: the
+ * current 8MB value just means that there will be a 8MB "hole" after the
+ * physical memory until the kernel virtual memory starts. That means that
+ * any out-of-bounds memory accesses will hopefully be caught.
+ * The vmalloc() routines leaves a hole of 4kB between each vmalloced
+ * area for the same reason. ;)
+ */
+
+extern unsigned long end_iomem;
+
+#define VMALLOC_OFFSET (__va_space)
+#define VMALLOC_START ((end_iomem + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
+#define PKMAP_BASE ((FIXADDR_START - LAST_PKMAP * PAGE_SIZE) & PMD_MASK)
+#ifdef CONFIG_HIGHMEM
+# define VMALLOC_END (PKMAP_BASE-2*PAGE_SIZE)
+#else
+# define VMALLOC_END (FIXADDR_START-2*PAGE_SIZE)
+#endif
+#define MODULES_VADDR VMALLOC_START
+#define MODULES_END VMALLOC_END
+#define MODULES_LEN (MODULES_VADDR - MODULES_END)
+
+#define _PAGE_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _KERNPG_TABLE (_PAGE_PRESENT | _PAGE_RW | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define _PAGE_CHG_MASK (PAGE_MASK | _PAGE_ACCESSED | _PAGE_DIRTY)
+#define __PAGE_KERNEL_EXEC \
+ (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
+#define PAGE_NONE __pgprot(_PAGE_PROTNONE | _PAGE_ACCESSED)
+#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_USER | _PAGE_ACCESSED)
+#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED)
+#define PAGE_KERNEL_EXEC __pgprot(__PAGE_KERNEL_EXEC)
+
+/*
+ * The i386 can't do page protection for execute, and considers that the same
+ * are read.
+ * Also, write permissions imply read permissions. This is the closest we can
+ * get..
+ */
+#define __P000 PAGE_NONE
+#define __P001 PAGE_READONLY
+#define __P010 PAGE_COPY
+#define __P011 PAGE_COPY
+#define __P100 PAGE_READONLY
+#define __P101 PAGE_READONLY
+#define __P110 PAGE_COPY
+#define __P111 PAGE_COPY
+
+#define __S000 PAGE_NONE
+#define __S001 PAGE_READONLY
+#define __S010 PAGE_SHARED
+#define __S011 PAGE_SHARED
+#define __S100 PAGE_READONLY
+#define __S101 PAGE_READONLY
+#define __S110 PAGE_SHARED
+#define __S111 PAGE_SHARED
+
+/*
+ * ZERO_PAGE is a global shared page that is always zero: used
+ * for zero-mapped memory areas etc..
+ */
+#define ZERO_PAGE(vaddr) virt_to_page(empty_zero_page)
+
+#define pte_clear(mm,addr,xp) pte_set_val(*(xp), (phys_t) 0, __pgprot(_PAGE_NEWPAGE))
+
+#define pmd_none(x) (!((unsigned long)pmd_val(x) & ~_PAGE_NEWPAGE))
+#define pmd_bad(x) ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
+
+#define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
+#define pmd_clear(xp) do { pmd_val(*(xp)) = _PAGE_NEWPAGE; } while (0)
+
+#define pmd_newpage(x) (pmd_val(x) & _PAGE_NEWPAGE)
+#define pmd_mkuptodate(x) (pmd_val(x) &= ~_PAGE_NEWPAGE)
+
+#define pud_newpage(x) (pud_val(x) & _PAGE_NEWPAGE)
+#define pud_mkuptodate(x) (pud_val(x) &= ~_PAGE_NEWPAGE)
+
+#define pmd_page(pmd) phys_to_page(pmd_val(pmd) & PAGE_MASK)
+
+#define pte_page(x) pfn_to_page(pte_pfn(x))
+
+#define pte_present(x) pte_get_bits(x, (_PAGE_PRESENT | _PAGE_PROTNONE))
+
+/*
+ * =================================
+ * Flags checking section.
+ * =================================
+ */
+
+static inline int pte_none(pte_t pte)
+{
+ return pte_is_zero(pte);
+}
+
+/*
+ * The following only work if pte_present() is true.
+ * Undefined behaviour if not..
+ */
+static inline int pte_read(pte_t pte)
+{
+ return((pte_get_bits(pte, _PAGE_USER)) &&
+ !(pte_get_bits(pte, _PAGE_PROTNONE)));
+}
+
+static inline int pte_exec(pte_t pte){
+ return((pte_get_bits(pte, _PAGE_USER)) &&
+ !(pte_get_bits(pte, _PAGE_PROTNONE)));
+}
+
+static inline int pte_write(pte_t pte)
+{
+ return((pte_get_bits(pte, _PAGE_RW)) &&
+ !(pte_get_bits(pte, _PAGE_PROTNONE)));
+}
+
+/*
+ * The following only works if pte_present() is not true.
+ */
+static inline int pte_file(pte_t pte)
+{
+ return pte_get_bits(pte, _PAGE_FILE);
+}
+
+static inline int pte_dirty(pte_t pte)
+{
+ return pte_get_bits(pte, _PAGE_DIRTY);
+}
+
+static inline int pte_young(pte_t pte)
+{
+ return pte_get_bits(pte, _PAGE_ACCESSED);
+}
+
+static inline int pte_newpage(pte_t pte)
+{
+ return pte_get_bits(pte, _PAGE_NEWPAGE);
+}
+
+static inline int pte_newprot(pte_t pte)
+{
+ return(pte_present(pte) && (pte_get_bits(pte, _PAGE_NEWPROT)));
+}
+
+static inline int pte_special(pte_t pte)
+{
+ return 0;
+}
+
+/*
+ * =================================
+ * Flags setting section.
+ * =================================
+ */
+
+static inline pte_t pte_mknewprot(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_NEWPROT);
+ return(pte);
+}
+
+static inline pte_t pte_mkclean(pte_t pte)
+{
+ pte_clear_bits(pte, _PAGE_DIRTY);
+ return(pte);
+}
+
+static inline pte_t pte_mkold(pte_t pte)
+{
+ pte_clear_bits(pte, _PAGE_ACCESSED);
+ return(pte);
+}
+
+static inline pte_t pte_wrprotect(pte_t pte)
+{
+ pte_clear_bits(pte, _PAGE_RW);
+ return(pte_mknewprot(pte));
+}
+
+static inline pte_t pte_mkread(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_USER);
+ return(pte_mknewprot(pte));
+}
+
+static inline pte_t pte_mkdirty(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_DIRTY);
+ return(pte);
+}
+
+static inline pte_t pte_mkyoung(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_ACCESSED);
+ return(pte);
+}
+
+static inline pte_t pte_mkwrite(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_RW);
+ return(pte_mknewprot(pte));
+}
+
+static inline pte_t pte_mkuptodate(pte_t pte)
+{
+ pte_clear_bits(pte, _PAGE_NEWPAGE);
+ if(pte_present(pte))
+ pte_clear_bits(pte, _PAGE_NEWPROT);
+ return(pte);
+}
+
+static inline pte_t pte_mknewpage(pte_t pte)
+{
+ pte_set_bits(pte, _PAGE_NEWPAGE);
+ return(pte);
+}
+
+static inline pte_t pte_mkspecial(pte_t pte)
+{
+ return(pte);
+}
+
+static inline void set_pte(pte_t *pteptr, pte_t pteval)
+{
+ pte_copy(*pteptr, pteval);
+
+ /* If it's a swap entry, it needs to be marked _PAGE_NEWPAGE so
+ * fix_range knows to unmap it. _PAGE_NEWPROT is specific to
+ * mapped pages.
+ */
+
+ *pteptr = pte_mknewpage(*pteptr);
+ if(pte_present(*pteptr)) *pteptr = pte_mknewprot(*pteptr);
+}
+#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
+
+/*
+ * Conversion functions: convert a page and protection to a page entry,
+ * and a page entry and page directory to the page they refer to.
+ */
+
+#define phys_to_page(phys) pfn_to_page(phys_to_pfn(phys))
+#define __virt_to_page(virt) phys_to_page(__pa(virt))
+#define page_to_phys(page) pfn_to_phys((pfn_t) page_to_pfn(page))
+#define virt_to_page(addr) __virt_to_page((const unsigned long) addr)
+
+#define mk_pte(page, pgprot) \
+ ({ pte_t pte; \
+ \
+ pte_set_val(pte, page_to_phys(page), (pgprot)); \
+ if (pte_present(pte)) \
+ pte_mknewprot(pte_mknewpage(pte)); \
+ pte;})
+
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+ pte_set_val(pte, (pte_val(pte) & _PAGE_CHG_MASK), newprot);
+ return pte;
+}
+
+/*
+ * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
+ *
+ * this macro returns the index of the entry in the pgd page which would
+ * control the given virtual address
+ */
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD-1))
+
+/*
+ * pgd_offset() returns a (pgd_t *)
+ * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
+ */
+#define pgd_offset(mm, address) ((mm)->pgd+pgd_index(address))
+
+/*
+ * a shortcut which implies the use of the kernel's pgd, instead
+ * of a process's
+ */
+#define pgd_offset_k(address) pgd_offset(&init_mm, address)
+
+/*
+ * the pmd page can be thought of an array like this: pmd_t[PTRS_PER_PMD]
+ *
+ * this macro returns the index of the entry in the pmd page which would
+ * control the given virtual address
+ */
+#define pmd_page_vaddr(pmd) ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+#define pmd_index(address) (((address) >> PMD_SHIFT) & (PTRS_PER_PMD-1))
+
+#define pmd_page_vaddr(pmd) \
+ ((unsigned long) __va(pmd_val(pmd) & PAGE_MASK))
+
+/*
+ * the pte page can be thought of an array like this: pte_t[PTRS_PER_PTE]
+ *
+ * this macro returns the index of the entry in the pte page which would
+ * control the given virtual address
+ */
+#define pte_index(address) (((address) >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
+#define pte_offset_kernel(dir, address) \
+ ((pte_t *) pmd_page_vaddr(*(dir)) + pte_index(address))
+#define pte_offset_map(dir, address) \
+ ((pte_t *)page_address(pmd_page(*(dir))) + pte_index(address))
+#define pte_unmap(pte) do { } while (0)
+
+struct mm_struct;
+extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
+
+#define update_mmu_cache(vma,address,ptep) do ; while (0)
+
+/* Encode and de-code a swap entry */
+#define __swp_type(x) (((x).val >> 4) & 0x3f)
+#define __swp_offset(x) ((x).val >> 11)
+
+#define __swp_entry(type, offset) \
+ ((swp_entry_t) { ((type) << 4) | ((offset) << 11) })
+#define __pte_to_swp_entry(pte) \
+ ((swp_entry_t) { pte_val(pte_mkuptodate(pte)) })
+#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
+
+#define kern_addr_valid(addr) (1)
+
+#include <asm-generic/pgtable.h>
+
+/* Clear a kernel PTE and flush it from the TLB */
+#define kpte_clear_flush(ptep, vaddr) \
+do { \
+ pte_clear(&init_mm, (vaddr), (ptep)); \
+ __flush_tlb_one((vaddr)); \
+} while (0)
+
+#endif
diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h
new file mode 100644
index 00000000000..98d01bc4fa9
--- /dev/null
+++ b/arch/um/include/asm/processor-generic.h
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PROCESSOR_GENERIC_H
+#define __UM_PROCESSOR_GENERIC_H
+
+struct pt_regs;
+
+struct task_struct;
+
+#include "asm/ptrace.h"
+#include "registers.h"
+#include "sysdep/archsetjmp.h"
+
+#include <linux/prefetch.h>
+
+struct mm_struct;
+
+struct thread_struct {
+ struct task_struct *saved_task;
+ /*
+ * This flag is set to 1 before calling do_fork (and analyzed in
+ * copy_thread) to mark that we are begin called from userspace (fork /
+ * vfork / clone), and reset to 0 after. It is left to 0 when called
+ * from kernelspace (i.e. kernel_thread() or fork_idle(),
+ * as of 2.6.11).
+ */
+ int forking;
+ struct pt_regs regs;
+ int singlestep_syscall;
+ void *fault_addr;
+ jmp_buf *fault_catcher;
+ struct task_struct *prev_sched;
+ unsigned long temp_stack;
+ jmp_buf *exec_buf;
+ struct arch_thread arch;
+ jmp_buf switch_buf;
+ int mm_count;
+ struct {
+ int op;
+ union {
+ struct {
+ int pid;
+ } fork, exec;
+ struct {
+ int (*proc)(void *);
+ void *arg;
+ } thread;
+ struct {
+ void (*proc)(void *);
+ void *arg;
+ } cb;
+ } u;
+ } request;
+};
+
+#define INIT_THREAD \
+{ \
+ .forking = 0, \
+ .regs = EMPTY_REGS, \
+ .fault_addr = NULL, \
+ .prev_sched = NULL, \
+ .temp_stack = 0, \
+ .exec_buf = NULL, \
+ .arch = INIT_ARCH_THREAD, \
+ .request = { 0 } \
+}
+
+extern struct task_struct *alloc_task_struct_node(int node);
+
+static inline void release_thread(struct task_struct *task)
+{
+}
+
+extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
+
+static inline void prepare_to_copy(struct task_struct *tsk)
+{
+}
+
+
+extern unsigned long thread_saved_pc(struct task_struct *t);
+
+static inline void mm_copy_segments(struct mm_struct *from_mm,
+ struct mm_struct *new_mm)
+{
+}
+
+#define init_stack (init_thread_union.stack)
+
+/*
+ * User space process size: 3GB (default).
+ */
+extern unsigned long task_size;
+
+#define TASK_SIZE (task_size)
+
+#undef STACK_TOP
+#undef STACK_TOP_MAX
+
+extern unsigned long stacksizelim;
+
+#define STACK_ROOM (stacksizelim)
+#define STACK_TOP (TASK_SIZE - 2 * PAGE_SIZE)
+#define STACK_TOP_MAX STACK_TOP
+
+/* This decides where the kernel will search for a free chunk of vm
+ * space during mmap's.
+ */
+#define TASK_UNMAPPED_BASE (0x40000000)
+
+extern void start_thread(struct pt_regs *regs, unsigned long entry,
+ unsigned long stack);
+
+struct cpuinfo_um {
+ unsigned long loops_per_jiffy;
+ int ipi_pipe[2];
+};
+
+extern struct cpuinfo_um boot_cpu_data;
+
+#define my_cpu_data cpu_data[smp_processor_id()]
+
+#ifdef CONFIG_SMP
+extern struct cpuinfo_um cpu_data[];
+#define current_cpu_data cpu_data[smp_processor_id()]
+#else
+#define cpu_data (&boot_cpu_data)
+#define current_cpu_data boot_cpu_data
+#endif
+
+
+#define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf)
+extern unsigned long get_wchan(struct task_struct *p);
+
+#endif
diff --git a/arch/um/include/asm/ptrace-generic.h b/arch/um/include/asm/ptrace-generic.h
new file mode 100644
index 00000000000..f605d3c4844
--- /dev/null
+++ b/arch/um/include/asm/ptrace-generic.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_PTRACE_GENERIC_H
+#define __UM_PTRACE_GENERIC_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/ptrace-abi.h>
+#include <asm/user.h>
+#include "sysdep/ptrace.h"
+
+struct pt_regs {
+ struct uml_pt_regs regs;
+};
+
+#define arch_has_single_step() (1)
+
+#define EMPTY_REGS { .regs = EMPTY_UML_PT_REGS }
+
+#define PT_REGS_IP(r) UPT_IP(&(r)->regs)
+#define PT_REGS_SP(r) UPT_SP(&(r)->regs)
+
+#define PT_REGS_RESTART_SYSCALL(r) UPT_RESTART_SYSCALL(&(r)->regs)
+
+#define PT_REGS_SYSCALL_NR(r) UPT_SYSCALL_NR(&(r)->regs)
+
+#define instruction_pointer(regs) PT_REGS_IP(regs)
+
+struct task_struct;
+
+extern long subarch_ptrace(struct task_struct *child, long request,
+ unsigned long addr, unsigned long data);
+extern unsigned long getreg(struct task_struct *child, int regno);
+extern int putreg(struct task_struct *child, int regno, unsigned long value);
+
+extern int arch_copy_tls(struct task_struct *new);
+extern void clear_flushed_tls(struct task_struct *task);
+
+#endif
+
+#endif
diff --git a/arch/um/include/asm/setup.h b/arch/um/include/asm/setup.h
new file mode 100644
index 00000000000..99f086301f4
--- /dev/null
+++ b/arch/um/include/asm/setup.h
@@ -0,0 +1,10 @@
+#ifndef SETUP_H_INCLUDED
+#define SETUP_H_INCLUDED
+
+/* POSIX mandated with _POSIX_ARG_MAX that we can rely on 4096 chars in the
+ * command line, so this choice is ok.
+ */
+
+#define COMMAND_LINE_SIZE 4096
+
+#endif /* SETUP_H_INCLUDED */
diff --git a/arch/um/include/asm/smp.h b/arch/um/include/asm/smp.h
new file mode 100644
index 00000000000..4a4b09d4f36
--- /dev/null
+++ b/arch/um/include/asm/smp.h
@@ -0,0 +1,32 @@
+#ifndef __UM_SMP_H
+#define __UM_SMP_H
+
+#ifdef CONFIG_SMP
+
+#include "linux/bitops.h"
+#include "asm/current.h"
+#include "linux/cpumask.h"
+
+#define raw_smp_processor_id() (current_thread->cpu)
+
+#define cpu_logical_map(n) (n)
+#define cpu_number_map(n) (n)
+extern int hard_smp_processor_id(void);
+#define NO_PROC_ID -1
+
+extern int ncpus;
+
+
+static inline void smp_cpus_done(unsigned int maxcpus)
+{
+}
+
+extern struct task_struct *idle_threads[NR_CPUS];
+
+#else
+
+#define hard_smp_processor_id() 0
+
+#endif
+
+#endif
diff --git a/arch/um/include/asm/thread_info.h b/arch/um/include/asm/thread_info.h
new file mode 100644
index 00000000000..200c4ab1240
--- /dev/null
+++ b/arch/um/include/asm/thread_info.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_THREAD_INFO_H
+#define __UM_THREAD_INFO_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/types.h>
+#include <asm/page.h>
+#include <asm/uaccess.h>
+
+struct thread_info {
+ struct task_struct *task; /* main task structure */
+ struct exec_domain *exec_domain; /* execution domain */
+ unsigned long flags; /* low level flags */
+ __u32 cpu; /* current CPU */
+ int preempt_count; /* 0 => preemptable,
+ <0 => BUG */
+ mm_segment_t addr_limit; /* thread address space:
+ 0-0xBFFFFFFF for user
+ 0-0xFFFFFFFF for kernel */
+ struct restart_block restart_block;
+ struct thread_info *real_thread; /* Points to non-IRQ stack */
+};
+
+#define INIT_THREAD_INFO(tsk) \
+{ \
+ .task = &tsk, \
+ .exec_domain = &default_exec_domain, \
+ .flags = 0, \
+ .cpu = 0, \
+ .preempt_count = INIT_PREEMPT_COUNT, \
+ .addr_limit = KERNEL_DS, \
+ .restart_block = { \
+ .fn = do_no_restart_syscall, \
+ }, \
+ .real_thread = NULL, \
+}
+
+#define init_thread_info (init_thread_union.thread_info)
+#define init_stack (init_thread_union.stack)
+
+#define THREAD_SIZE ((1 << CONFIG_KERNEL_STACK_ORDER) * PAGE_SIZE)
+/* how to get the thread information struct from C */
+static inline struct thread_info *current_thread_info(void)
+{
+ struct thread_info *ti;
+ unsigned long mask = THREAD_SIZE - 1;
+ void *p;
+
+ asm volatile ("" : "=r" (p) : "0" (&ti));
+ ti = (struct thread_info *) (((unsigned long)p) & ~mask);
+ return ti;
+}
+
+#define THREAD_SIZE_ORDER CONFIG_KERNEL_STACK_ORDER
+
+#endif
+
+#define PREEMPT_ACTIVE 0x10000000
+
+#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
+#define TIF_SIGPENDING 1 /* signal pending */
+#define TIF_NEED_RESCHED 2 /* rescheduling necessary */
+#define TIF_POLLING_NRFLAG 3 /* true if poll_idle() is polling
+ * TIF_NEED_RESCHED */
+#define TIF_RESTART_BLOCK 4
+#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
+#define TIF_SYSCALL_AUDIT 6
+#define TIF_RESTORE_SIGMASK 7
+
+#define _TIF_SYSCALL_TRACE (1 << TIF_SYSCALL_TRACE)
+#define _TIF_SIGPENDING (1 << TIF_SIGPENDING)
+#define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED)
+#define _TIF_POLLING_NRFLAG (1 << TIF_POLLING_NRFLAG)
+#define _TIF_MEMDIE (1 << TIF_MEMDIE)
+#define _TIF_SYSCALL_AUDIT (1 << TIF_SYSCALL_AUDIT)
+#define _TIF_RESTORE_SIGMASK (1 << TIF_RESTORE_SIGMASK)
+
+#endif
diff --git a/arch/um/include/asm/timex.h b/arch/um/include/asm/timex.h
new file mode 100644
index 00000000000..0f4ada08f74
--- /dev/null
+++ b/arch/um/include/asm/timex.h
@@ -0,0 +1,13 @@
+#ifndef __UM_TIMEX_H
+#define __UM_TIMEX_H
+
+typedef unsigned long cycles_t;
+
+static inline cycles_t get_cycles (void)
+{
+ return 0;
+}
+
+#define CLOCK_TICK_RATE (HZ)
+
+#endif
diff --git a/arch/um/include/asm/tlb.h b/arch/um/include/asm/tlb.h
new file mode 100644
index 00000000000..4febacd1a8a
--- /dev/null
+++ b/arch/um/include/asm/tlb.h
@@ -0,0 +1,120 @@
+#ifndef __UM_TLB_H
+#define __UM_TLB_H
+
+#include <linux/pagemap.h>
+#include <linux/swap.h>
+#include <asm/percpu.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+
+#define tlb_start_vma(tlb, vma) do { } while (0)
+#define tlb_end_vma(tlb, vma) do { } while (0)
+#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
+
+/* struct mmu_gather is an opaque type used by the mm code for passing around
+ * any data needed by arch specific code for tlb_remove_page.
+ */
+struct mmu_gather {
+ struct mm_struct *mm;
+ unsigned int need_flush; /* Really unmapped some ptes? */
+ unsigned long start;
+ unsigned long end;
+ unsigned int fullmm; /* non-zero means full mm flush */
+};
+
+static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
+ unsigned long address)
+{
+ if (tlb->start > address)
+ tlb->start = address;
+ if (tlb->end < address + PAGE_SIZE)
+ tlb->end = address + PAGE_SIZE;
+}
+
+static inline void init_tlb_gather(struct mmu_gather *tlb)
+{
+ tlb->need_flush = 0;
+
+ tlb->start = TASK_SIZE;
+ tlb->end = 0;
+
+ if (tlb->fullmm) {
+ tlb->start = 0;
+ tlb->end = TASK_SIZE;
+ }
+}
+
+static inline void
+tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned int full_mm_flush)
+{
+ tlb->mm = mm;
+ tlb->fullmm = full_mm_flush;
+
+ init_tlb_gather(tlb);
+}
+
+extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
+ unsigned long end);
+
+static inline void
+tlb_flush_mmu(struct mmu_gather *tlb)
+{
+ if (!tlb->need_flush)
+ return;
+
+ flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end);
+ init_tlb_gather(tlb);
+}
+
+/* tlb_finish_mmu
+ * Called at the end of the shootdown operation to free up any resources
+ * that were required.
+ */
+static inline void
+tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
+{
+ tlb_flush_mmu(tlb);
+
+ /* keep the page table cache within bounds */
+ check_pgt_cache();
+}
+
+/* tlb_remove_page
+ * Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)),
+ * while handling the additional races in SMP caused by other CPUs
+ * caching valid mappings in their TLBs.
+ */
+static inline int __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
+{
+ tlb->need_flush = 1;
+ free_page_and_swap_cache(page);
+ return 1; /* avoid calling tlb_flush_mmu */
+}
+
+static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
+{
+ __tlb_remove_page(tlb, page);
+}
+
+/**
+ * tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.
+ *
+ * Record the fact that pte's were really umapped in ->need_flush, so we can
+ * later optimise away the tlb invalidate. This helps when userspace is
+ * unmapping already-unmapped pages, which happens quite a lot.
+ */
+#define tlb_remove_tlb_entry(tlb, ptep, address) \
+ do { \
+ tlb->need_flush = 1; \
+ __tlb_remove_tlb_entry(tlb, ptep, address); \
+ } while (0)
+
+#define pte_free_tlb(tlb, ptep, addr) __pte_free_tlb(tlb, ptep, addr)
+
+#define pud_free_tlb(tlb, pudp, addr) __pud_free_tlb(tlb, pudp, addr)
+
+#define pmd_free_tlb(tlb, pmdp, addr) __pmd_free_tlb(tlb, pmdp, addr)
+
+#define tlb_migrate_finish(mm) do {} while (0)
+
+#endif
diff --git a/arch/um/include/asm/tlbflush.h b/arch/um/include/asm/tlbflush.h
new file mode 100644
index 00000000000..614f2c09117
--- /dev/null
+++ b/arch/um/include/asm/tlbflush.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_TLBFLUSH_H
+#define __UM_TLBFLUSH_H
+
+#include <linux/mm.h>
+
+/*
+ * TLB flushing:
+ *
+ * - flush_tlb() flushes the current mm struct TLBs
+ * - flush_tlb_all() flushes all processes TLBs
+ * - flush_tlb_mm(mm) flushes the specified mm context TLB's
+ * - flush_tlb_page(vma, vmaddr) flushes one page
+ * - flush_tlb_kernel_vm() flushes the kernel vm area
+ * - flush_tlb_range(vma, start, end) flushes a range of pages
+ */
+
+extern void flush_tlb_all(void);
+extern void flush_tlb_mm(struct mm_struct *mm);
+extern void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+ unsigned long end);
+extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long address);
+extern void flush_tlb_kernel_vm(void);
+extern void flush_tlb_kernel_range(unsigned long start, unsigned long end);
+extern void __flush_tlb_one(unsigned long addr);
+
+#endif
diff --git a/arch/um/include/asm/uaccess.h b/arch/um/include/asm/uaccess.h
new file mode 100644
index 00000000000..3f22fbf7ca1
--- /dev/null
+++ b/arch/um/include/asm/uaccess.h
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_UACCESS_H
+#define __UM_UACCESS_H
+
+/* thread_info has a mm_segment_t in it, so put the definition up here */
+typedef struct {
+ unsigned long seg;
+} mm_segment_t;
+
+#include <linux/thread_info.h>
+#include <linux/errno.h>
+#include <asm/processor.h>
+#include <asm/elf.h>
+
+#define VERIFY_READ 0
+#define VERIFY_WRITE 1
+
+/*
+ * The fs value determines whether argument validity checking should be
+ * performed or not. If get_fs() == USER_DS, checking is performed, with
+ * get_fs() == KERNEL_DS, checking is bypassed.
+ *
+ * For historical reasons, these macros are grossly misnamed.
+ */
+
+#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
+
+#define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
+#define USER_DS MAKE_MM_SEG(TASK_SIZE)
+
+#define get_ds() (KERNEL_DS)
+#define get_fs() (current_thread_info()->addr_limit)
+#define set_fs(x) (current_thread_info()->addr_limit = (x))
+
+#define segment_eq(a, b) ((a).seg == (b).seg)
+
+#define __under_task_size(addr, size) \
+ (((unsigned long) (addr) < TASK_SIZE) && \
+ (((unsigned long) (addr) + (size)) < TASK_SIZE))
+
+#define __access_ok_vsyscall(type, addr, size) \
+ ((type == VERIFY_READ) && \
+ ((unsigned long) (addr) >= FIXADDR_USER_START) && \
+ ((unsigned long) (addr) + (size) <= FIXADDR_USER_END) && \
+ ((unsigned long) (addr) + (size) >= (unsigned long)(addr)))
+
+#define __addr_range_nowrap(addr, size) \
+ ((unsigned long) (addr) <= ((unsigned long) (addr) + (size)))
+
+#define access_ok(type, addr, size) \
+ (__addr_range_nowrap(addr, size) && \
+ (__under_task_size(addr, size) || \
+ __access_ok_vsyscall(type, addr, size) || \
+ segment_eq(get_fs(), KERNEL_DS)))
+
+extern int copy_from_user(void *to, const void __user *from, int n);
+extern int copy_to_user(void __user *to, const void *from, int n);
+
+/*
+ * strncpy_from_user: - Copy a NUL terminated string from userspace.
+ * @dst: Destination address, in kernel space. This buffer must be at
+ * least @count bytes long.
+ * @src: Source address, in user space.
+ * @count: Maximum number of bytes to copy, including the trailing NUL.
+ *
+ * Copies a NUL-terminated string from userspace to kernel space.
+ *
+ * On success, returns the length of the string (not including the trailing
+ * NUL).
+ *
+ * If access to userspace fails, returns -EFAULT (some data may have been
+ * copied).
+ *
+ * If @count is smaller than the length of the string, copies @count bytes
+ * and returns @count.
+ */
+
+extern int strncpy_from_user(char *dst, const char __user *src, int count);
+
+/*
+ * __clear_user: - Zero a block of memory in user space, with less checking.
+ * @to: Destination address, in user space.
+ * @n: Number of bytes to zero.
+ *
+ * Zero a block of memory in user space. Caller must check
+ * the specified block with access_ok() before calling this function.
+ *
+ * Returns number of bytes that could not be cleared.
+ * On success, this will be zero.
+ */
+extern int __clear_user(void __user *mem, int len);
+
+/*
+ * clear_user: - Zero a block of memory in user space.
+ * @to: Destination address, in user space.
+ * @n: Number of bytes to zero.
+ *
+ * Zero a block of memory in user space.
+ *
+ * Returns number of bytes that could not be cleared.
+ * On success, this will be zero.
+ */
+extern int clear_user(void __user *mem, int len);
+
+/*
+ * strlen_user: - Get the size of a string in user space.
+ * @str: The string to measure.
+ * @n: The maximum valid length
+ *
+ * Get the size of a NUL-terminated string in user space.
+ *
+ * Returns the size of the string INCLUDING the terminating NUL.
+ * On exception, returns 0.
+ * If the string is too long, returns a value greater than @n.
+ */
+extern int strnlen_user(const void __user *str, int len);
+
+#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
+
+#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
+
+#define __copy_to_user_inatomic __copy_to_user
+#define __copy_from_user_inatomic __copy_from_user
+
+#define __get_user(x, ptr) \
+({ \
+ const __typeof__(*(ptr)) __user *__private_ptr = (ptr); \
+ __typeof__(x) __private_val; \
+ int __private_ret = -EFAULT; \
+ (x) = (__typeof__(*(__private_ptr)))0; \
+ if (__copy_from_user((__force void *)&__private_val, (__private_ptr),\
+ sizeof(*(__private_ptr))) == 0) { \
+ (x) = (__typeof__(*(__private_ptr))) __private_val; \
+ __private_ret = 0; \
+ } \
+ __private_ret; \
+})
+
+#define get_user(x, ptr) \
+({ \
+ const __typeof__((*(ptr))) __user *private_ptr = (ptr); \
+ (access_ok(VERIFY_READ, private_ptr, sizeof(*private_ptr)) ? \
+ __get_user(x, private_ptr) : ((x) = (__typeof__(*ptr))0, -EFAULT)); \
+})
+
+#define __put_user(x, ptr) \
+({ \
+ __typeof__(*(ptr)) __user *__private_ptr = ptr; \
+ __typeof__(*(__private_ptr)) __private_val; \
+ int __private_ret = -EFAULT; \
+ __private_val = (__typeof__(*(__private_ptr))) (x); \
+ if (__copy_to_user((__private_ptr), &__private_val, \
+ sizeof(*(__private_ptr))) == 0) { \
+ __private_ret = 0; \
+ } \
+ __private_ret; \
+})
+
+#define put_user(x, ptr) \
+({ \
+ __typeof__(*(ptr)) __user *private_ptr = (ptr); \
+ (access_ok(VERIFY_WRITE, private_ptr, sizeof(*private_ptr)) ? \
+ __put_user(x, private_ptr) : -EFAULT); \
+})
+
+#define strlen_user(str) strnlen_user(str, ~0U >> 1)
+
+struct exception_table_entry
+{
+ unsigned long insn;
+ unsigned long fixup;
+};
+
+#endif
diff --git a/arch/um/include/shared/aio.h b/arch/um/include/shared/aio.h
new file mode 100644
index 00000000000..423bae9153f
--- /dev/null
+++ b/arch/um/include/shared/aio.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2004 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef AIO_H__
+#define AIO_H__
+
+enum aio_type { AIO_READ, AIO_WRITE, AIO_MMAP };
+
+struct aio_thread_reply {
+ void *data;
+ int err;
+};
+
+struct aio_context {
+ int reply_fd;
+ struct aio_context *next;
+};
+
+#define INIT_AIO_CONTEXT { .reply_fd = -1, \
+ .next = NULL }
+
+extern int submit_aio(enum aio_type type, int fd, char *buf, int len,
+ unsigned long long offset, int reply_fd,
+ struct aio_context *aio);
+
+#endif
diff --git a/arch/um/include/shared/arch.h b/arch/um/include/shared/arch.h
new file mode 100644
index 00000000000..2de92a08a76
--- /dev/null
+++ b/arch/um/include/shared/arch.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __ARCH_H__
+#define __ARCH_H__
+
+#include "sysdep/ptrace.h"
+
+extern void arch_check_bugs(void);
+extern int arch_fixup(unsigned long address, struct uml_pt_regs *regs);
+extern void arch_examine_signal(int sig, struct uml_pt_regs *regs);
+
+#endif
diff --git a/arch/um/include/shared/as-layout.h b/arch/um/include/shared/as-layout.h
new file mode 100644
index 00000000000..896e1660217
--- /dev/null
+++ b/arch/um/include/shared/as-layout.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __START_H__
+#define __START_H__
+
+#include <generated/asm-offsets.h>
+
+/*
+ * Stolen from linux/const.h, which can't be directly included since
+ * this is used in userspace code, which has no access to the kernel
+ * headers. Changed to be suitable for adding casts to the start,
+ * rather than "UL" to the end.
+ */
+
+/* Some constant macros are used in both assembler and
+ * C code. Therefore we cannot annotate them always with
+ * 'UL' and other type specifiers unilaterally. We
+ * use the following macros to deal with this.
+ */
+
+#ifdef __ASSEMBLY__
+#define _UML_AC(X, Y) (Y)
+#else
+#define __UML_AC(X, Y) (X(Y))
+#define _UML_AC(X, Y) __UML_AC(X, Y)
+#endif
+
+#define STUB_START _UML_AC(, 0x100000)
+#define STUB_CODE _UML_AC((unsigned long), STUB_START)
+#define STUB_DATA _UML_AC((unsigned long), STUB_CODE + UM_KERN_PAGE_SIZE)
+#define STUB_END _UML_AC((unsigned long), STUB_DATA + UM_KERN_PAGE_SIZE)
+
+#ifndef __ASSEMBLY__
+
+#include "sysdep/ptrace.h"
+
+struct cpu_task {
+ int pid;
+ void *task;
+};
+
+extern struct cpu_task cpu_tasks[];
+
+extern unsigned long low_physmem;
+extern unsigned long high_physmem;
+extern unsigned long uml_physmem;
+extern unsigned long uml_reserved;
+extern unsigned long end_vm;
+extern unsigned long start_vm;
+extern unsigned long long highmem;
+
+extern unsigned long _stext, _etext, _sdata, _edata, __bss_start, _end;
+extern unsigned long _unprotected_end;
+extern unsigned long brk_start;
+
+extern unsigned long host_task_size;
+
+extern int linux_main(int argc, char **argv);
+
+extern void (*sig_info[])(int, struct uml_pt_regs *);
+
+#endif
+
+#endif
diff --git a/arch/um/include/shared/common-offsets.h b/arch/um/include/shared/common-offsets.h
new file mode 100644
index 00000000000..d7fe563aa7e
--- /dev/null
+++ b/arch/um/include/shared/common-offsets.h
@@ -0,0 +1,53 @@
+/* for use by sys-$SUBARCH/kernel-offsets.c */
+
+DEFINE(KERNEL_MADV_REMOVE, MADV_REMOVE);
+
+OFFSET(HOST_TASK_PID, task_struct, pid);
+
+DEFINE(UM_KERN_PAGE_SIZE, PAGE_SIZE);
+DEFINE(UM_KERN_PAGE_MASK, PAGE_MASK);
+DEFINE(UM_KERN_PAGE_SHIFT, PAGE_SHIFT);
+DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
+
+DEFINE_STR(UM_KERN_EMERG, KERN_EMERG);
+DEFINE_STR(UM_KERN_ALERT, KERN_ALERT);
+DEFINE_STR(UM_KERN_CRIT, KERN_CRIT);
+DEFINE_STR(UM_KERN_ERR, KERN_ERR);
+DEFINE_STR(UM_KERN_WARNING, KERN_WARNING);
+DEFINE_STR(UM_KERN_NOTICE, KERN_NOTICE);
+DEFINE_STR(UM_KERN_INFO, KERN_INFO);
+DEFINE_STR(UM_KERN_DEBUG, KERN_DEBUG);
+DEFINE_STR(UM_KERN_CONT, KERN_CONT);
+
+DEFINE(UM_ELF_CLASS, ELF_CLASS);
+DEFINE(UM_ELFCLASS32, ELFCLASS32);
+DEFINE(UM_ELFCLASS64, ELFCLASS64);
+
+DEFINE(UM_NR_CPUS, NR_CPUS);
+
+DEFINE(UM_GFP_KERNEL, GFP_KERNEL);
+DEFINE(UM_GFP_ATOMIC, GFP_ATOMIC);
+
+/* For crypto assembler code. */
+DEFINE(crypto_tfm_ctx_offset, offsetof(struct crypto_tfm, __crt_ctx));
+
+DEFINE(UM_THREAD_SIZE, THREAD_SIZE);
+
+DEFINE(UM_HZ, HZ);
+
+DEFINE(UM_USEC_PER_SEC, USEC_PER_SEC);
+DEFINE(UM_NSEC_PER_SEC, NSEC_PER_SEC);
+DEFINE(UM_NSEC_PER_USEC, NSEC_PER_USEC);
+
+#ifdef CONFIG_PRINTK
+DEFINE(UML_CONFIG_PRINTK, CONFIG_PRINTK);
+#endif
+#ifdef CONFIG_NO_HZ
+DEFINE(UML_CONFIG_NO_HZ, CONFIG_NO_HZ);
+#endif
+#ifdef CONFIG_UML_X86
+DEFINE(UML_CONFIG_UML_X86, CONFIG_UML_X86);
+#endif
+#ifdef CONFIG_64BIT
+DEFINE(UML_CONFIG_64BIT, CONFIG_64BIT);
+#endif
diff --git a/arch/um/include/shared/elf_user.h b/arch/um/include/shared/elf_user.h
new file mode 100644
index 00000000000..53516b63727
--- /dev/null
+++ b/arch/um/include/shared/elf_user.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2004 Fujitsu Siemens Computers GmbH
+ * Author: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
+ * Licensed under the GPL
+ */
+
+#ifndef __ELF_USER_H__
+#define __ELF_USER_H__
+
+/* For compilation on a host that doesn't support AT_SYSINFO (Linux 2.4) */
+
+#ifndef AT_SYSINFO
+#define AT_SYSINFO 32
+#endif
+#ifndef AT_SYSINFO_EHDR
+#define AT_SYSINFO_EHDR 33
+#endif
+
+#endif
diff --git a/arch/um/include/shared/frame_kern.h b/arch/um/include/shared/frame_kern.h
new file mode 100644
index 00000000000..76078490c25
--- /dev/null
+++ b/arch/um/include/shared/frame_kern.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __FRAME_KERN_H_
+#define __FRAME_KERN_H_
+
+#define _S(nr) (1<<((nr)-1))
+#define _BLOCKABLE (~(_S(SIGKILL) | _S(SIGSTOP)))
+
+extern int setup_signal_stack_sc(unsigned long stack_top, int sig,
+ struct k_sigaction *ka,
+ struct pt_regs *regs,
+ sigset_t *mask);
+extern int setup_signal_stack_si(unsigned long stack_top, int sig,
+ struct k_sigaction *ka,
+ struct pt_regs *regs, siginfo_t *info,
+ sigset_t *mask);
+
+#endif
+
diff --git a/arch/um/include/shared/init.h b/arch/um/include/shared/init.h
new file mode 100644
index 00000000000..b3906f860a8
--- /dev/null
+++ b/arch/um/include/shared/init.h
@@ -0,0 +1,151 @@
+#ifndef _LINUX_UML_INIT_H
+#define _LINUX_UML_INIT_H
+
+/* These macros are used to mark some functions or
+ * initialized data (doesn't apply to uninitialized data)
+ * as `initialization' functions. The kernel can take this
+ * as hint that the function is used only during the initialization
+ * phase and free up used memory resources after
+ *
+ * Usage:
+ * For functions:
+ *
+ * You should add __init immediately before the function name, like:
+ *
+ * static void __init initme(int x, int y)
+ * {
+ * extern int z; z = x * y;
+ * }
+ *
+ * If the function has a prototype somewhere, you can also add
+ * __init between closing brace of the prototype and semicolon:
+ *
+ * extern int initialize_foobar_device(int, int, int) __init;
+ *
+ * For initialized data:
+ * You should insert __initdata between the variable name and equal
+ * sign followed by value, e.g.:
+ *
+ * static int init_variable __initdata = 0;
+ * static const char linux_logo[] __initconst = { 0x32, 0x36, ... };
+ *
+ * Don't forget to initialize data not at file scope, i.e. within a function,
+ * as gcc otherwise puts the data into the bss section and not into the init
+ * section.
+ *
+ * Also note, that this data cannot be "const".
+ */
+
+#ifndef _LINUX_INIT_H
+typedef int (*initcall_t)(void);
+typedef void (*exitcall_t)(void);
+
+#ifndef __KERNEL__
+#ifndef __section
+# define __section(S) __attribute__ ((__section__(#S)))
+#endif
+
+#if __GNUC__ == 3
+
+#if __GNUC_MINOR__ >= 3
+# define __used __attribute__((__used__))
+#else
+# define __used __attribute__((__unused__))
+#endif
+
+#else
+#if __GNUC__ == 4
+# define __used __attribute__((__used__))
+#endif
+#endif
+
+#else
+#include <linux/compiler.h>
+#endif
+/* These are for everybody (although not all archs will actually
+ discard it in modules) */
+#define __init __section(.init.text)
+#define __initdata __section(.init.data)
+#define __exitdata __section(.exit.data)
+#define __exit_call __used __section(.exitcall.exit)
+
+#ifdef MODULE
+#define __exit __section(.exit.text)
+#else
+#define __exit __used __section(.exit.text)
+#endif
+
+#endif
+
+#ifndef MODULE
+struct uml_param {
+ const char *str;
+ int (*setup_func)(char *, int *);
+};
+
+extern initcall_t __uml_initcall_start, __uml_initcall_end;
+extern initcall_t __uml_postsetup_start, __uml_postsetup_end;
+extern const char *__uml_help_start, *__uml_help_end;
+#endif
+
+#define __uml_initcall(fn) \
+ static initcall_t __uml_initcall_##fn __uml_init_call = fn
+
+#define __uml_exitcall(fn) \
+ static exitcall_t __uml_exitcall_##fn __uml_exit_call = fn
+
+extern struct uml_param __uml_setup_start, __uml_setup_end;
+
+#define __uml_postsetup(fn) \
+ static initcall_t __uml_postsetup_##fn __uml_postsetup_call = fn
+
+#define __non_empty_string(dummyname,string) \
+ struct __uml_non_empty_string_struct_##dummyname \
+ { \
+ char _string[sizeof(string)-2]; \
+ }
+
+#ifndef MODULE
+#define __uml_setup(str, fn, help...) \
+ __non_empty_string(fn ##_setup, str); \
+ __uml_help(fn, help); \
+ static char __uml_setup_str_##fn[] __initdata = str; \
+ static struct uml_param __uml_setup_##fn __uml_init_setup = { __uml_setup_str_##fn, fn }
+#else
+#define __uml_setup(str, fn, help...) \
+
+#endif
+
+#define __uml_help(fn, help...) \
+ __non_empty_string(fn ##__help, help); \
+ static char __uml_help_str_##fn[] __initdata = help; \
+ static const char *__uml_help_##fn __uml_setup_help = __uml_help_str_##fn
+
+/*
+ * Mark functions and data as being only used at initialization
+ * or exit time.
+ */
+#define __uml_init_setup __used __section(.uml.setup.init)
+#define __uml_setup_help __used __section(.uml.help.init)
+#define __uml_init_call __used __section(.uml.initcall.init)
+#define __uml_postsetup_call __used __section(.uml.postsetup.init)
+#define __uml_exit_call __used __section(.uml.exitcall.exit)
+
+#ifndef __KERNEL__
+
+#define __define_initcall(level,fn) \
+ static initcall_t __initcall_##fn __used \
+ __attribute__((__section__(".initcall" level ".init"))) = fn
+
+/* Userspace initcalls shouldn't depend on anything in the kernel, so we'll
+ * make them run first.
+ */
+#define __initcall(fn) __define_initcall("1", fn)
+
+#define __exitcall(fn) static exitcall_t __exitcall_##fn __exit_call = fn
+
+#define __init_call __used __section(.initcall.init)
+
+#endif
+
+#endif /* _LINUX_UML_INIT_H */
diff --git a/arch/um/include/shared/irq_kern.h b/arch/um/include/shared/irq_kern.h
new file mode 100644
index 00000000000..b05d22f3d84
--- /dev/null
+++ b/arch/um/include/shared/irq_kern.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __IRQ_KERN_H__
+#define __IRQ_KERN_H__
+
+#include "linux/interrupt.h"
+#include "asm/ptrace.h"
+
+extern int um_request_irq(unsigned int irq, int fd, int type,
+ irq_handler_t handler,
+ unsigned long irqflags, const char * devname,
+ void *dev_id);
+
+#endif
+
diff --git a/arch/um/include/shared/irq_user.h b/arch/um/include/shared/irq_user.h
new file mode 100644
index 00000000000..c6c784df267
--- /dev/null
+++ b/arch/um/include/shared/irq_user.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __IRQ_USER_H__
+#define __IRQ_USER_H__
+
+#include "sysdep/ptrace.h"
+
+struct irq_fd {
+ struct irq_fd *next;
+ void *id;
+ int fd;
+ int type;
+ int irq;
+ int events;
+ int current_events;
+};
+
+enum { IRQ_READ, IRQ_WRITE };
+
+extern void sigio_handler(int sig, struct uml_pt_regs *regs);
+extern void free_irq_by_fd(int fd);
+extern void reactivate_fd(int fd, int irqnum);
+extern void deactivate_fd(int fd, int irqnum);
+extern int deactivate_all_fds(void);
+extern int activate_ipi(int fd, int pid);
+
+#endif
diff --git a/arch/um/include/shared/kern.h b/arch/um/include/shared/kern.h
new file mode 100644
index 00000000000..6cd01240bbf
--- /dev/null
+++ b/arch/um/include/shared/kern.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2000 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __KERN_H__
+#define __KERN_H__
+
+/* These are all user-mode things which are convenient to call directly
+ * from kernel code and for which writing a wrapper is too much of a pain.
+ * The regular include files can't be included because this file is included
+ * only into kernel code, and user-space includes conflict with kernel
+ * includes.
+ */
+
+extern int printf(const char *fmt, ...);
+extern void *sbrk(int increment);
+extern int pause(void);
+extern void exit(int);
+
+#endif
+
diff --git a/arch/um/include/shared/kern_util.h b/arch/um/include/shared/kern_util.h
new file mode 100644
index 00000000000..0f148385246
--- /dev/null
+++ b/arch/um/include/shared/kern_util.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __KERN_UTIL_H__
+#define __KERN_UTIL_H__
+
+#include "sysdep/ptrace.h"
+#include "sysdep/faultinfo.h"
+
+extern int uml_exitcode;
+
+extern int ncpus;
+extern int kmalloc_ok;
+
+#define UML_ROUND_UP(addr) \
+ ((((unsigned long) addr) + PAGE_SIZE - 1) & PAGE_MASK)
+
+extern unsigned long alloc_stack(int order, int atomic);
+extern void free_stack(unsigned long stack, int order);
+
+extern int do_signal(void);
+extern void interrupt_end(void);
+extern void relay_signal(int sig, struct uml_pt_regs *regs);
+
+extern unsigned long segv(struct faultinfo fi, unsigned long ip,
+ int is_user, struct uml_pt_regs *regs);
+extern int handle_page_fault(unsigned long address, unsigned long ip,
+ int is_write, int is_user, int *code_out);
+
+extern unsigned int do_IRQ(int irq, struct uml_pt_regs *regs);
+extern int smp_sigio_handler(void);
+extern void initial_thread_cb(void (*proc)(void *), void *arg);
+extern int is_syscall(unsigned long addr);
+extern void timer_handler(int sig, struct uml_pt_regs *regs);
+
+extern void timer_handler(int sig, struct uml_pt_regs *regs);
+
+extern int start_uml(void);
+extern void paging_init(void);
+
+extern void uml_cleanup(void);
+extern void do_uml_exitcalls(void);
+
+/*
+ * Are we disallowed to sleep? Used to choose between GFP_KERNEL and
+ * GFP_ATOMIC.
+ */
+extern int __cant_sleep(void);
+extern void *get_current(void);
+extern int copy_from_user_proc(void *to, void *from, int size);
+extern int cpu(void);
+extern char *uml_strdup(const char *string);
+
+extern unsigned long to_irq_stack(unsigned long *mask_out);
+extern unsigned long from_irq_stack(int nested);
+
+extern void syscall_trace(struct uml_pt_regs *regs, int entryexit);
+extern int singlestepping(void *t);
+
+extern void segv_handler(int sig, struct uml_pt_regs *regs);
+extern void bus_handler(int sig, struct uml_pt_regs *regs);
+extern void winch(int sig, struct uml_pt_regs *regs);
+extern void fatal_sigsegv(void) __attribute__ ((noreturn));
+
+
+#endif
diff --git a/arch/um/include/shared/longjmp.h b/arch/um/include/shared/longjmp.h
new file mode 100644
index 00000000000..e860bc5848e
--- /dev/null
+++ b/arch/um/include/shared/longjmp.h
@@ -0,0 +1,23 @@
+#ifndef __UML_LONGJMP_H
+#define __UML_LONGJMP_H
+
+#include "sysdep/archsetjmp.h"
+#include "os.h"
+
+extern int setjmp(jmp_buf);
+extern void longjmp(jmp_buf, int);
+
+#define UML_LONGJMP(buf, val) do { \
+ longjmp(*buf, val); \
+} while(0)
+
+#define UML_SETJMP(buf) ({ \
+ int n; \
+ volatile int enable; \
+ enable = get_signals(); \
+ n = setjmp(*buf); \
+ if(n != 0) \
+ set_signals(enable); \
+ n; })
+
+#endif
diff --git a/arch/um/include/shared/mem.h b/arch/um/include/shared/mem.h
new file mode 100644
index 00000000000..5cd40e99e8d
--- /dev/null
+++ b/arch/um/include/shared/mem.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MEM_H__
+#define __MEM_H__
+
+extern int phys_mapping(unsigned long phys, unsigned long long *offset_out);
+
+extern unsigned long uml_physmem;
+static inline unsigned long to_phys(void *virt)
+{
+ return(((unsigned long) virt) - uml_physmem);
+}
+
+static inline void *to_virt(unsigned long phys)
+{
+ return((void *) uml_physmem + phys);
+}
+
+#endif
diff --git a/arch/um/include/shared/mem_user.h b/arch/um/include/shared/mem_user.h
new file mode 100644
index 00000000000..46384acd547
--- /dev/null
+++ b/arch/um/include/shared/mem_user.h
@@ -0,0 +1,62 @@
+/*
+ * arch/um/include/mem_user.h
+ *
+ * BRIEF MODULE DESCRIPTION
+ * user side memory interface for support IO memory inside user mode linux
+ *
+ * Copyright (C) 2001 RidgeRun, Inc.
+ * Author: RidgeRun, Inc.
+ * Greg Lonnon glonnon@ridgerun.com or info@ridgerun.com
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _MEM_USER_H
+#define _MEM_USER_H
+
+struct iomem_region {
+ struct iomem_region *next;
+ char *driver;
+ int fd;
+ int size;
+ unsigned long phys;
+ unsigned long virt;
+};
+
+extern struct iomem_region *iomem_regions;
+extern int iomem_size;
+
+#define ROUND_4M(n) ((((unsigned long) (n)) + (1 << 22)) & ~((1 << 22) - 1))
+
+extern int init_mem_user(void);
+extern void setup_memory(void *entry);
+extern unsigned long find_iomem(char *driver, unsigned long *len_out);
+extern int init_maps(unsigned long physmem, unsigned long iomem,
+ unsigned long highmem);
+extern unsigned long get_vm(unsigned long len);
+extern void setup_physmem(unsigned long start, unsigned long usable,
+ unsigned long len, unsigned long long highmem);
+extern void add_iomem(char *name, int fd, unsigned long size);
+extern unsigned long phys_offset(unsigned long phys);
+extern void map_memory(unsigned long virt, unsigned long phys,
+ unsigned long len, int r, int w, int x);
+
+#endif
diff --git a/arch/um/include/shared/net_kern.h b/arch/um/include/shared/net_kern.h
new file mode 100644
index 00000000000..5c367f22595
--- /dev/null
+++ b/arch/um/include/shared/net_kern.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2002 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_NET_KERN_H
+#define __UM_NET_KERN_H
+
+#include <linux/netdevice.h>
+#include <linux/platform_device.h>
+#include <linux/skbuff.h>
+#include <linux/socket.h>
+#include <linux/list.h>
+#include <linux/workqueue.h>
+
+struct uml_net {
+ struct list_head list;
+ struct net_device *dev;
+ struct platform_device pdev;
+ int index;
+ unsigned char mac[ETH_ALEN];
+};
+
+struct uml_net_private {
+ struct list_head list;
+ spinlock_t lock;
+ struct net_device *dev;
+ struct timer_list tl;
+
+ struct work_struct work;
+ int fd;
+ unsigned char mac[ETH_ALEN];
+ int max_packet;
+ unsigned short (*protocol)(struct sk_buff *);
+ int (*open)(void *);
+ void (*close)(int, void *);
+ void (*remove)(void *);
+ int (*read)(int, struct sk_buff *skb, struct uml_net_private *);
+ int (*write)(int, struct sk_buff *skb, struct uml_net_private *);
+
+ void (*add_address)(unsigned char *, unsigned char *, void *);
+ void (*delete_address)(unsigned char *, unsigned char *, void *);
+ char user[0];
+};
+
+struct net_kern_info {
+ void (*init)(struct net_device *, void *);
+ unsigned short (*protocol)(struct sk_buff *);
+ int (*read)(int, struct sk_buff *skb, struct uml_net_private *);
+ int (*write)(int, struct sk_buff *skb, struct uml_net_private *);
+};
+
+struct transport {
+ struct list_head list;
+ const char *name;
+ int (* const setup)(char *, char **, void *);
+ const struct net_user_info *user;
+ const struct net_kern_info *kern;
+ const int private_size;
+ const int setup_size;
+};
+
+extern struct net_device *ether_init(int);
+extern unsigned short ether_protocol(struct sk_buff *);
+extern int tap_setup_common(char *str, char *type, char **dev_name,
+ char **mac_out, char **gate_addr);
+extern void register_transport(struct transport *new);
+extern unsigned short eth_protocol(struct sk_buff *skb);
+
+#endif
diff --git a/arch/um/include/shared/net_user.h b/arch/um/include/shared/net_user.h
new file mode 100644
index 00000000000..3dabbe128e4
--- /dev/null
+++ b/arch/um/include/shared/net_user.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_NET_USER_H__
+#define __UM_NET_USER_H__
+
+#define ETH_ADDR_LEN (6)
+#define ETH_HEADER_ETHERTAP (16)
+#define ETH_HEADER_OTHER (26) /* 14 for ethernet + VLAN + MPLS for crazy people */
+#define ETH_MAX_PACKET (1500)
+
+#define UML_NET_VERSION (4)
+
+struct net_user_info {
+ int (*init)(void *, void *);
+ int (*open)(void *);
+ void (*close)(int, void *);
+ void (*remove)(void *);
+ void (*add_address)(unsigned char *, unsigned char *, void *);
+ void (*delete_address)(unsigned char *, unsigned char *, void *);
+ int max_packet;
+ int mtu;
+};
+
+extern void ether_user_init(void *data, void *dev);
+extern void iter_addresses(void *d, void (*cb)(unsigned char *,
+ unsigned char *, void *),
+ void *arg);
+
+extern void *get_output_buffer(int *len_out);
+extern void free_output_buffer(void *buffer);
+
+extern int tap_open_common(void *dev, char *gate_addr);
+extern void tap_check_ips(char *gate_addr, unsigned char *eth_addr);
+
+extern void read_output(int fd, char *output_out, int len);
+
+extern int net_read(int fd, void *buf, int len);
+extern int net_recvfrom(int fd, void *buf, int len);
+extern int net_write(int fd, void *buf, int len);
+extern int net_send(int fd, void *buf, int len);
+extern int net_sendto(int fd, void *buf, int len, void *to, int sock_len);
+
+extern void open_addr(unsigned char *addr, unsigned char *netmask, void *arg);
+extern void close_addr(unsigned char *addr, unsigned char *netmask, void *arg);
+
+extern char *split_if_spec(char *str, ...);
+
+extern int dev_netmask(void *d, void *m);
+
+#endif
diff --git a/arch/um/include/shared/os.h b/arch/um/include/shared/os.h
new file mode 100644
index 00000000000..89b686c1a3e
--- /dev/null
+++ b/arch/um/include/shared/os.h
@@ -0,0 +1,302 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __OS_H__
+#define __OS_H__
+
+#include <stdarg.h>
+#include "irq_user.h"
+#include "longjmp.h"
+#include "mm_id.h"
+
+#define CATCH_EINTR(expr) while ((errno = 0, ((expr) < 0)) && (errno == EINTR))
+
+#define OS_TYPE_FILE 1
+#define OS_TYPE_DIR 2
+#define OS_TYPE_SYMLINK 3
+#define OS_TYPE_CHARDEV 4
+#define OS_TYPE_BLOCKDEV 5
+#define OS_TYPE_FIFO 6
+#define OS_TYPE_SOCK 7
+
+/* os_access() flags */
+#define OS_ACC_F_OK 0 /* Test for existence. */
+#define OS_ACC_X_OK 1 /* Test for execute permission. */
+#define OS_ACC_W_OK 2 /* Test for write permission. */
+#define OS_ACC_R_OK 4 /* Test for read permission. */
+#define OS_ACC_RW_OK (OS_ACC_W_OK | OS_ACC_R_OK) /* Test for RW permission */
+
+#ifdef CONFIG_64BIT
+#define OS_LIB_PATH "/usr/lib64/"
+#else
+#define OS_LIB_PATH "/usr/lib/"
+#endif
+
+/*
+ * types taken from stat_file() in hostfs_user.c
+ * (if they are wrong here, they are wrong there...).
+ */
+struct uml_stat {
+ int ust_dev; /* device */
+ unsigned long long ust_ino; /* inode */
+ int ust_mode; /* protection */
+ int ust_nlink; /* number of hard links */
+ int ust_uid; /* user ID of owner */
+ int ust_gid; /* group ID of owner */
+ unsigned long long ust_size; /* total size, in bytes */
+ int ust_blksize; /* blocksize for filesystem I/O */
+ unsigned long long ust_blocks; /* number of blocks allocated */
+ unsigned long ust_atime; /* time of last access */
+ unsigned long ust_mtime; /* time of last modification */
+ unsigned long ust_ctime; /* time of last change */
+};
+
+struct openflags {
+ unsigned int r : 1;
+ unsigned int w : 1;
+ unsigned int s : 1; /* O_SYNC */
+ unsigned int c : 1; /* O_CREAT */
+ unsigned int t : 1; /* O_TRUNC */
+ unsigned int a : 1; /* O_APPEND */
+ unsigned int e : 1; /* O_EXCL */
+ unsigned int cl : 1; /* FD_CLOEXEC */
+};
+
+#define OPENFLAGS() ((struct openflags) { .r = 0, .w = 0, .s = 0, .c = 0, \
+ .t = 0, .a = 0, .e = 0, .cl = 0 })
+
+static inline struct openflags of_read(struct openflags flags)
+{
+ flags.r = 1;
+ return flags;
+}
+
+static inline struct openflags of_write(struct openflags flags)
+{
+ flags.w = 1;
+ return flags;
+}
+
+static inline struct openflags of_rdwr(struct openflags flags)
+{
+ return of_read(of_write(flags));
+}
+
+static inline struct openflags of_set_rw(struct openflags flags, int r, int w)
+{
+ flags.r = r;
+ flags.w = w;
+ return flags;
+}
+
+static inline struct openflags of_sync(struct openflags flags)
+{
+ flags.s = 1;
+ return flags;
+}
+
+static inline struct openflags of_create(struct openflags flags)
+{
+ flags.c = 1;
+ return flags;
+}
+
+static inline struct openflags of_trunc(struct openflags flags)
+{
+ flags.t = 1;
+ return flags;
+}
+
+static inline struct openflags of_append(struct openflags flags)
+{
+ flags.a = 1;
+ return flags;
+}
+
+static inline struct openflags of_excl(struct openflags flags)
+{
+ flags.e = 1;
+ return flags;
+}
+
+static inline struct openflags of_cloexec(struct openflags flags)
+{
+ flags.cl = 1;
+ return flags;
+}
+
+/* file.c */
+extern int os_stat_file(const char *file_name, struct uml_stat *buf);
+extern int os_stat_fd(const int fd, struct uml_stat *buf);
+extern int os_access(const char *file, int mode);
+extern int os_set_exec_close(int fd);
+extern int os_ioctl_generic(int fd, unsigned int cmd, unsigned long arg);
+extern int os_get_ifname(int fd, char *namebuf);
+extern int os_set_slip(int fd);
+extern int os_mode_fd(int fd, int mode);
+
+extern int os_seek_file(int fd, unsigned long long offset);
+extern int os_open_file(const char *file, struct openflags flags, int mode);
+extern int os_read_file(int fd, void *buf, int len);
+extern int os_write_file(int fd, const void *buf, int count);
+extern int os_file_size(const char *file, unsigned long long *size_out);
+extern int os_file_modtime(const char *file, unsigned long *modtime);
+extern int os_pipe(int *fd, int stream, int close_on_exec);
+extern int os_set_fd_async(int fd);
+extern int os_clear_fd_async(int fd);
+extern int os_set_fd_block(int fd, int blocking);
+extern int os_accept_connection(int fd);
+extern int os_create_unix_socket(const char *file, int len, int close_on_exec);
+extern int os_shutdown_socket(int fd, int r, int w);
+extern void os_close_file(int fd);
+extern int os_rcv_fd(int fd, int *helper_pid_out);
+extern int create_unix_socket(char *file, int len, int close_on_exec);
+extern int os_connect_socket(const char *name);
+extern int os_file_type(char *file);
+extern int os_file_mode(const char *file, struct openflags *mode_out);
+extern int os_lock_file(int fd, int excl);
+extern void os_flush_stdout(void);
+extern int os_stat_filesystem(char *path, long *bsize_out,
+ long long *blocks_out, long long *bfree_out,
+ long long *bavail_out, long long *files_out,
+ long long *ffree_out, void *fsid_out,
+ int fsid_size, long *namelen_out,
+ long *spare_out);
+extern int os_change_dir(char *dir);
+extern int os_fchange_dir(int fd);
+extern unsigned os_major(unsigned long long dev);
+extern unsigned os_minor(unsigned long long dev);
+extern unsigned long long os_makedev(unsigned major, unsigned minor);
+
+/* start_up.c */
+extern void os_early_checks(void);
+extern void can_do_skas(void);
+extern void os_check_bugs(void);
+extern void check_host_supports_tls(int *supports_tls, int *tls_min);
+
+/* mem.c */
+extern int create_mem_file(unsigned long long len);
+
+/* process.c */
+extern unsigned long os_process_pc(int pid);
+extern int os_process_parent(int pid);
+extern void os_stop_process(int pid);
+extern void os_kill_process(int pid, int reap_child);
+extern void os_kill_ptraced_process(int pid, int reap_child);
+extern long os_ptrace_ldt(long pid, long addr, long data);
+
+extern int os_getpid(void);
+extern int os_getpgrp(void);
+
+extern void init_new_thread_signals(void);
+extern int run_kernel_thread(int (*fn)(void *), void *arg, jmp_buf **jmp_ptr);
+
+extern int os_map_memory(void *virt, int fd, unsigned long long off,
+ unsigned long len, int r, int w, int x);
+extern int os_protect_memory(void *addr, unsigned long len,
+ int r, int w, int x);
+extern int os_unmap_memory(void *addr, int len);
+extern int os_drop_memory(void *addr, int length);
+extern int can_drop_memory(void);
+extern void os_flush_stdout(void);
+
+/* execvp.c */
+extern int execvp_noalloc(char *buf, const char *file, char *const argv[]);
+/* helper.c */
+extern int run_helper(void (*pre_exec)(void *), void *pre_data, char **argv);
+extern int run_helper_thread(int (*proc)(void *), void *arg,
+ unsigned int flags, unsigned long *stack_out);
+extern int helper_wait(int pid);
+
+
+/* umid.c */
+extern int umid_file_name(char *name, char *buf, int len);
+extern int set_umid(char *name);
+extern char *get_umid(void);
+
+/* signal.c */
+extern void timer_init(void);
+extern void set_sigstack(void *sig_stack, int size);
+extern void remove_sigstack(void);
+extern void set_handler(int sig);
+extern int change_sig(int signal, int on);
+extern void block_signals(void);
+extern void unblock_signals(void);
+extern int get_signals(void);
+extern int set_signals(int enable);
+
+/* util.c */
+extern void stack_protections(unsigned long address);
+extern int raw(int fd);
+extern void setup_machinename(char *machine_out);
+extern void setup_hostinfo(char *buf, int len);
+extern void os_dump_core(void) __attribute__ ((noreturn));
+extern void um_early_printk(const char *s, unsigned int n);
+
+/* time.c */
+extern void idle_sleep(unsigned long long nsecs);
+extern int set_interval(void);
+extern int timer_one_shot(int ticks);
+extern long long disable_timer(void);
+extern void uml_idle_timer(void);
+extern long long os_nsecs(void);
+
+/* skas/mem.c */
+extern long run_syscall_stub(struct mm_id * mm_idp,
+ int syscall, unsigned long *args, long expected,
+ void **addr, int done);
+extern long syscall_stub_data(struct mm_id * mm_idp,
+ unsigned long *data, int data_count,
+ void **addr, void **stub_addr);
+extern int map(struct mm_id * mm_idp, unsigned long virt,
+ unsigned long len, int prot, int phys_fd,
+ unsigned long long offset, int done, void **data);
+extern int unmap(struct mm_id * mm_idp, unsigned long addr, unsigned long len,
+ int done, void **data);
+extern int protect(struct mm_id * mm_idp, unsigned long addr,
+ unsigned long len, unsigned int prot, int done, void **data);
+
+/* skas/process.c */
+extern int is_skas_winch(int pid, int fd, void *data);
+extern int start_userspace(unsigned long stub_stack);
+extern int copy_context_skas0(unsigned long stack, int pid);
+extern void userspace(struct uml_pt_regs *regs);
+extern int map_stub_pages(int fd, unsigned long code, unsigned long data,
+ unsigned long stack);
+extern void new_thread(void *stack, jmp_buf *buf, void (*handler)(void));
+extern void switch_threads(jmp_buf *me, jmp_buf *you);
+extern int start_idle_thread(void *stack, jmp_buf *switch_buf);
+extern void initial_thread_cb_skas(void (*proc)(void *),
+ void *arg);
+extern void halt_skas(void);
+extern void reboot_skas(void);
+
+/* irq.c */
+extern int os_waiting_for_events(struct irq_fd *active_fds);
+extern int os_create_pollfd(int fd, int events, void *tmp_pfd, int size_tmpfds);
+extern void os_free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg,
+ struct irq_fd *active_fds, struct irq_fd ***last_irq_ptr2);
+extern void os_free_irq_later(struct irq_fd *active_fds,
+ int irq, void *dev_id);
+extern int os_get_pollfd(int i);
+extern void os_set_pollfd(int i, int fd);
+extern void os_set_ioignore(void);
+
+/* sigio.c */
+extern int add_sigio_fd(int fd);
+extern int ignore_sigio_fd(int fd);
+extern void maybe_sigio_broken(int fd, int read);
+extern void sigio_broken(int fd, int read);
+
+/* sys-x86_64/prctl.c */
+extern int os_arch_prctl(int pid, int code, unsigned long *addr);
+
+/* tty.c */
+extern int get_pty(void);
+
+/* sys-$ARCH/task_size.c */
+extern unsigned long os_get_top_address(void);
+
+#endif
diff --git a/arch/um/include/shared/ptrace_user.h b/arch/um/include/shared/ptrace_user.h
new file mode 100644
index 00000000000..56b2f284b10
--- /dev/null
+++ b/arch/um/include/shared/ptrace_user.h
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __PTRACE_USER_H__
+#define __PTRACE_USER_H__
+
+#include <sys/ptrace.h>
+#include <sysdep/ptrace_user.h>
+
+extern int ptrace_getregs(long pid, unsigned long *regs_out);
+extern int ptrace_setregs(long pid, unsigned long *regs_in);
+
+/* syscall emulation path in ptrace */
+
+#ifndef PTRACE_SYSEMU
+#define PTRACE_SYSEMU 31
+#endif
+#ifndef PTRACE_SYSEMU_SINGLESTEP
+#define PTRACE_SYSEMU_SINGLESTEP 32
+#endif
+
+/* On architectures, that started to support PTRACE_O_TRACESYSGOOD
+ * in linux 2.4, there are two different definitions of
+ * PTRACE_SETOPTIONS: linux 2.4 uses 21 while linux 2.6 uses 0x4200.
+ * For binary compatibility, 2.6 also supports the old "21", named
+ * PTRACE_OLDSETOPTION. On these architectures, UML always must use
+ * "21", to ensure the kernel runs on 2.4 and 2.6 host without
+ * recompilation. So, we use PTRACE_OLDSETOPTIONS in UML.
+ * We also want to be able to build the kernel on 2.4, which doesn't
+ * have PTRACE_OLDSETOPTIONS. So, if it is missing, we declare
+ * PTRACE_OLDSETOPTIONS to be the same as PTRACE_SETOPTIONS.
+ *
+ * On architectures, that start to support PTRACE_O_TRACESYSGOOD on
+ * linux 2.6, PTRACE_OLDSETOPTIONS never is defined, and also isn't
+ * supported by the host kernel. In that case, our trick lets us use
+ * the new 0x4200 with the name PTRACE_OLDSETOPTIONS.
+ */
+#ifndef PTRACE_OLDSETOPTIONS
+#define PTRACE_OLDSETOPTIONS PTRACE_SETOPTIONS
+#endif
+
+void set_using_sysemu(int value);
+int get_using_sysemu(void);
+extern int sysemu_supported;
+
+#define SELECT_PTRACE_OPERATION(sysemu_mode, singlestep_mode) \
+ (((int[3][3] ) { \
+ { PTRACE_SYSCALL, PTRACE_SYSCALL, PTRACE_SINGLESTEP }, \
+ { PTRACE_SYSEMU, PTRACE_SYSEMU, PTRACE_SINGLESTEP }, \
+ { PTRACE_SYSEMU, PTRACE_SYSEMU_SINGLESTEP, \
+ PTRACE_SYSEMU_SINGLESTEP } }) \
+ [sysemu_mode][singlestep_mode])
+
+#endif
diff --git a/arch/um/include/shared/registers.h b/arch/um/include/shared/registers.h
new file mode 100644
index 00000000000..f1e0aa56c52
--- /dev/null
+++ b/arch/um/include/shared/registers.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2004 PathScale, Inc
+ * Licensed under the GPL
+ */
+
+#ifndef __REGISTERS_H
+#define __REGISTERS_H
+
+#include "sysdep/ptrace.h"
+#include "sysdep/archsetjmp.h"
+
+extern int save_fp_registers(int pid, unsigned long *fp_regs);
+extern int restore_fp_registers(int pid, unsigned long *fp_regs);
+extern int save_fpx_registers(int pid, unsigned long *fp_regs);
+extern int restore_fpx_registers(int pid, unsigned long *fp_regs);
+extern int save_registers(int pid, struct uml_pt_regs *regs);
+extern int restore_registers(int pid, struct uml_pt_regs *regs);
+extern int init_registers(int pid);
+extern void get_safe_registers(unsigned long *regs, unsigned long *fp_regs);
+extern unsigned long get_thread_reg(int reg, jmp_buf *buf);
+extern int get_fp_registers(int pid, unsigned long *regs);
+extern int put_fp_registers(int pid, unsigned long *regs);
+
+#endif
diff --git a/arch/um/include/shared/sigio.h b/arch/um/include/shared/sigio.h
new file mode 100644
index 00000000000..434f1a9ae4b
--- /dev/null
+++ b/arch/um/include/shared/sigio.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SIGIO_H__
+#define __SIGIO_H__
+
+extern int write_sigio_irq(int fd);
+extern int register_sigio_fd(int fd);
+extern void sigio_lock(void);
+extern void sigio_unlock(void);
+
+#endif
diff --git a/arch/um/include/shared/skas/mm_id.h b/arch/um/include/shared/skas/mm_id.h
new file mode 100644
index 00000000000..48dd0989dda
--- /dev/null
+++ b/arch/um/include/shared/skas/mm_id.h
@@ -0,0 +1,17 @@
+/*
+ * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __MM_ID_H
+#define __MM_ID_H
+
+struct mm_id {
+ union {
+ int mm_fd;
+ int pid;
+ } u;
+ unsigned long stack;
+};
+
+#endif
diff --git a/arch/um/include/shared/skas/proc_mm.h b/arch/um/include/shared/skas/proc_mm.h
new file mode 100644
index 00000000000..90280920960
--- /dev/null
+++ b/arch/um/include/shared/skas/proc_mm.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SKAS_PROC_MM_H
+#define __SKAS_PROC_MM_H
+
+#define MM_MMAP 54
+#define MM_MUNMAP 55
+#define MM_MPROTECT 56
+#define MM_COPY_SEGMENTS 57
+
+struct mm_mmap {
+ unsigned long addr;
+ unsigned long len;
+ unsigned long prot;
+ unsigned long flags;
+ unsigned long fd;
+ unsigned long offset;
+};
+
+struct mm_munmap {
+ unsigned long addr;
+ unsigned long len;
+};
+
+struct mm_mprotect {
+ unsigned long addr;
+ unsigned long len;
+ unsigned int prot;
+};
+
+struct proc_mm_op {
+ int op;
+ union {
+ struct mm_mmap mmap;
+ struct mm_munmap munmap;
+ struct mm_mprotect mprotect;
+ int copy_segments;
+ } u;
+};
+
+#endif
diff --git a/arch/um/include/shared/skas/skas.h b/arch/um/include/shared/skas/skas.h
new file mode 100644
index 00000000000..64d2c744330
--- /dev/null
+++ b/arch/um/include/shared/skas/skas.h
@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SKAS_H
+#define __SKAS_H
+
+#include "sysdep/ptrace.h"
+
+extern int userspace_pid[];
+extern int proc_mm, ptrace_faultinfo, ptrace_ldt;
+extern int skas_needs_stub;
+
+extern int user_thread(unsigned long stack, int flags);
+extern void new_thread_handler(void);
+extern void handle_syscall(struct uml_pt_regs *regs);
+extern int new_mm(unsigned long stack);
+extern long execute_syscall_skas(void *r);
+extern unsigned long current_stub_stack(void);
+
+#endif
diff --git a/arch/um/include/shared/skas/stub-data.h b/arch/um/include/shared/skas/stub-data.h
new file mode 100644
index 00000000000..f6ed92c3727
--- /dev/null
+++ b/arch/um/include/shared/skas/stub-data.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright (C) 2005 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __STUB_DATA_H
+#define __STUB_DATA_H
+
+#include <sys/time.h>
+
+struct stub_data {
+ long offset;
+ int fd;
+ struct itimerval timer;
+ long err;
+};
+
+#endif
diff --git a/arch/um/include/shared/skas_ptrace.h b/arch/um/include/shared/skas_ptrace.h
new file mode 100644
index 00000000000..3d31bbacd01
--- /dev/null
+++ b/arch/um/include/shared/skas_ptrace.h
@@ -0,0 +1,14 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __SKAS_PTRACE_H
+#define __SKAS_PTRACE_H
+
+#define PTRACE_FAULTINFO 52
+#define PTRACE_SWITCH_MM 55
+
+#include "sysdep/skas_ptrace.h"
+
+#endif
diff --git a/arch/um/include/shared/sysrq.h b/arch/um/include/shared/sysrq.h
new file mode 100644
index 00000000000..c8d332b56b9
--- /dev/null
+++ b/arch/um/include/shared/sysrq.h
@@ -0,0 +1,7 @@
+#ifndef __UM_SYSRQ_H
+#define __UM_SYSRQ_H
+
+struct task_struct;
+extern void show_trace(struct task_struct* task, unsigned long *stack);
+
+#endif
diff --git a/arch/um/include/shared/um_malloc.h b/arch/um/include/shared/um_malloc.h
new file mode 100644
index 00000000000..6395fef6b69
--- /dev/null
+++ b/arch/um/include/shared/um_malloc.h
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2005 Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
+ * Licensed under the GPL
+ */
+
+#ifndef __UM_MALLOC_H__
+#define __UM_MALLOC_H__
+
+#include <generated/asm-offsets.h>
+
+extern void *uml_kmalloc(int size, int flags);
+extern void kfree(const void *ptr);
+
+extern void *vmalloc(unsigned long size);
+extern void vfree(void *ptr);
+
+#endif /* __UM_MALLOC_H__ */
+
+
diff --git a/arch/um/include/shared/user.h b/arch/um/include/shared/user.h
new file mode 100644
index 00000000000..4fa82c055aa
--- /dev/null
+++ b/arch/um/include/shared/user.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#ifndef __USER_H__
+#define __USER_H__
+
+#include <generated/asm-offsets.h>
+
+/*
+ * The usual definition - copied here because the kernel provides its own,
+ * fancier, type-safe, definition. Using that one would require
+ * copying too much infrastructure for my taste, so userspace files
+ * get less checking than kernel files.
+ */
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+/* This is to get size_t */
+#ifdef __KERNEL__
+#include <linux/types.h>
+#else
+#include <stddef.h>
+#endif
+
+extern void panic(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
+
+#ifdef UML_CONFIG_PRINTK
+extern int printk(const char *fmt, ...)
+ __attribute__ ((format (printf, 1, 2)));
+#else
+static inline int printk(const char *fmt, ...)
+{
+ return 0;
+}
+#endif
+
+extern int in_aton(char *str);
+extern size_t strlcpy(char *, const char *, size_t);
+extern size_t strlcat(char *, const char *, size_t);
+
+/* Copied from linux/compiler-gcc.h since we can't include it directly */
+#define barrier() __asm__ __volatile__("": : :"memory")
+
+#endif
diff --git a/arch/um/kernel/Makefile b/arch/um/kernel/Makefile
new file mode 100644
index 00000000000..bc494741b1f
--- /dev/null
+++ b/arch/um/kernel/Makefile
@@ -0,0 +1,48 @@
+#
+# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux,intel}.com)
+# Licensed under the GPL
+#
+
+CPPFLAGS_vmlinux.lds := -U$(SUBARCH) -DSTART=$(LDS_START) \
+ -DELF_ARCH=$(LDS_ELF_ARCH) \
+ -DELF_FORMAT=$(LDS_ELF_FORMAT)
+extra-y := vmlinux.lds
+clean-files :=
+
+obj-y = config.o exec.o exitcode.o init_task.o irq.o ksyms.o mem.o \
+ physmem.o process.o ptrace.o reboot.o sigio.o \
+ signal.o smp.o syscall.o sysrq.o time.o tlb.o trap.o \
+ um_arch.o umid.o skas/
+
+obj-$(CONFIG_BLK_DEV_INITRD) += initrd.o
+obj-$(CONFIG_GPROF) += gprof_syms.o
+obj-$(CONFIG_GCOV) += gmon_syms.o
+obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
+
+USER_OBJS := config.o
+
+include arch/um/scripts/Makefile.rules
+
+targets := config.c config.tmp
+
+# Be careful with the below Sed code - sed is pitfall-rich!
+# We use sed to lower build requirements, for "embedded" builders for instance.
+
+$(obj)/config.tmp: $(objtree)/.config FORCE
+ $(call if_changed,quote1)
+
+quiet_cmd_quote1 = QUOTE $@
+ cmd_quote1 = sed -e 's/"/\\"/g' -e 's/^/"/' -e 's/$$/\\n",/' \
+ $< > $@
+
+$(obj)/config.c: $(src)/config.c.in $(obj)/config.tmp FORCE
+ $(call if_changed,quote2)
+
+quiet_cmd_quote2 = QUOTE $@
+ cmd_quote2 = sed -e '/CONFIG/{' \
+ -e 's/"CONFIG"//' \
+ -e 'r $(obj)/config.tmp' \
+ -e 'a \' \
+ -e '""' \
+ -e '}' \
+ $< > $@
diff --git a/arch/um/kernel/asm-offsets.c b/arch/um/kernel/asm-offsets.c
new file mode 100644
index 00000000000..91ea538e161
--- /dev/null
+++ b/arch/um/kernel/asm-offsets.c
@@ -0,0 +1 @@
+#include "sysdep/kernel-offsets.h"
diff --git a/arch/um/kernel/config.c.in b/arch/um/kernel/config.c.in
new file mode 100644
index 00000000000..b7a43feafde
--- /dev/null
+++ b/arch/um/kernel/config.c.in
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "init.h"
+
+static __initdata const char *config[] = {
+"CONFIG"
+};
+
+static int __init print_config(char *line, int *add)
+{
+ int i;
+ for (i = 0; i < sizeof(config)/sizeof(config[0]); i++)
+ printf("%s", config[i]);
+ exit(0);
+}
+
+__uml_setup("--showconfig", print_config,
+"--showconfig\n"
+" Prints the config file that this UML binary was generated from.\n\n"
+);
+
diff --git a/arch/um/kernel/dyn.lds.S b/arch/um/kernel/dyn.lds.S
new file mode 100644
index 00000000000..a3cab6d3ae0
--- /dev/null
+++ b/arch/um/kernel/dyn.lds.S
@@ -0,0 +1,166 @@
+#include <asm-generic/vmlinux.lds.h>
+#include <asm/page.h>
+
+OUTPUT_FORMAT(ELF_FORMAT)
+OUTPUT_ARCH(ELF_ARCH)
+ENTRY(_start)
+jiffies = jiffies_64;
+
+SECTIONS
+{
+ PROVIDE (__executable_start = START);
+ . = START + SIZEOF_HEADERS;
+ .interp : { *(.interp) }
+ __binary_start = .;
+ . = ALIGN(4096); /* Init code and data */
+ _text = .;
+ _stext = .;
+ __init_begin = .;
+ INIT_TEXT_SECTION(PAGE_SIZE)
+
+ . = ALIGN(PAGE_SIZE);
+
+ /* Read-only sections, merged into text segment: */
+ .hash : { *(.hash) }
+ .gnu.hash : { *(.gnu.hash) }
+ .dynsym : { *(.dynsym) }
+ .dynstr : { *(.dynstr) }
+ .gnu.version : { *(.gnu.version) }
+ .gnu.version_d : { *(.gnu.version_d) }
+ .gnu.version_r : { *(.gnu.version_r) }
+ .rel.init : { *(.rel.init) }
+ .rela.init : { *(.rela.init) }
+ .rel.text : { *(.rel.text .rel.text.* .rel.gnu.linkonce.t.*) }
+ .rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) }
+ .rel.fini : { *(.rel.fini) }
+ .rela.fini : { *(.rela.fini) }
+ .rel.rodata : { *(.rel.rodata .rel.rodata.* .rel.gnu.linkonce.r.*) }
+ .rela.rodata : { *(.rela.rodata .rela.rodata.* .rela.gnu.linkonce.r.*) }
+ .rel.data : { *(.rel.data .rel.data.* .rel.gnu.linkonce.d.*) }
+ .rela.data : { *(.rela.data .rela.data.* .rela.gnu.linkonce.d.*) }
+ .rel.tdata : { *(.rel.tdata .rel.tdata.* .rel.gnu.linkonce.td.*) }
+ .rela.tdata : { *(.rela.tdata .rela.tdata.* .rela.gnu.linkonce.td.*) }
+ .rel.tbss : { *(.rel.tbss .rel.tbss.* .rel.gnu.linkonce.tb.*) }
+ .rela.tbss : { *(.rela.tbss .rela.tbss.* .rela.gnu.linkonce.tb.*) }
+ .rel.ctors : { *(.rel.ctors) }
+ .rela.ctors : { *(.rela.ctors) }
+ .rel.dtors : { *(.rel.dtors) }
+ .rela.dtors : { *(.rela.dtors) }
+ .rel.got : { *(.rel.got) }
+ .rela.got : { *(.rela.got) }
+ .rel.bss : { *(.rel.bss .rel.bss.* .rel.gnu.linkonce.b.*) }
+ .rela.bss : { *(.rela.bss .rela.bss.* .rela.gnu.linkonce.b.*) }
+ .rel.plt : {
+ *(.rel.plt)
+ PROVIDE_HIDDEN(__rel_iplt_start = .);
+ *(.rel.iplt)
+ PROVIDE_HIDDEN(__rel_iplt_end = .);
+ }
+ .rela.plt : {
+ *(.rela.plt)
+ PROVIDE_HIDDEN(__rela_iplt_start = .);
+ *(.rela.iplt)
+ PROVIDE_HIDDEN(__rela_iplt_end = .);
+ }
+ .init : {
+ KEEP (*(.init))
+ } =0x90909090
+ .plt : { *(.plt) }
+ .text : {
+ TEXT_TEXT
+ SCHED_TEXT
+ LOCK_TEXT
+ *(.fixup)
+ *(.stub .text.* .gnu.linkonce.t.*)
+ /* .gnu.warning sections are handled specially by elf32.em. */
+ *(.gnu.warning)
+
+ . = ALIGN(PAGE_SIZE);
+ } =0x90909090
+ . = ALIGN(PAGE_SIZE);
+ .syscall_stub : {
+ __syscall_stub_start = .;
+ *(.__syscall_stub*)
+ __syscall_stub_end = .;
+ }
+ .fini : {
+ KEEP (*(.fini))
+ } =0x90909090
+
+ .kstrtab : { *(.kstrtab) }
+
+ #include "asm/common.lds.S"
+
+ init.data : { INIT_DATA }
+
+ /* Ensure the __preinit_array_start label is properly aligned. We
+ could instead move the label definition inside the section, but
+ the linker would then create the section even if it turns out to
+ be empty, which isn't pretty. */
+ . = ALIGN(32 / 8);
+ .preinit_array : { *(.preinit_array) }
+ .init_array : { *(.init_array) }
+ .fini_array : { *(.fini_array) }
+ .data : {
+ INIT_TASK_DATA(KERNEL_STACK_SIZE)
+ . = ALIGN(KERNEL_STACK_SIZE);
+ *(.data..init_irqstack)
+ DATA_DATA
+ *(.data.* .gnu.linkonce.d.*)
+ SORT(CONSTRUCTORS)
+ }
+ .data1 : { *(.data1) }
+ .tdata : { *(.tdata .tdata.* .gnu.linkonce.td.*) }
+ .tbss : { *(.tbss .tbss.* .gnu.linkonce.tb.*) *(.tcommon) }
+ .eh_frame : { KEEP (*(.eh_frame)) }
+ .gcc_except_table : { *(.gcc_except_table) }
+ .dynamic : { *(.dynamic) }
+ .ctors : {
+ /* gcc uses crtbegin.o to find the start of
+ the constructors, so we make sure it is
+ first. Because this is a wildcard, it
+ doesn't matter if the user does not
+ actually link against crtbegin.o; the
+ linker won't look for a file to match a
+ wildcard. The wildcard also means that it
+ doesn't matter which directory crtbegin.o
+ is in. */
+ KEEP (*crtbegin.o(.ctors))
+ /* We don't want to include the .ctor section from
+ from the crtend.o file until after the sorted ctors.
+ The .ctor section from the crtend file contains the
+ end of ctors marker and it must be last */
+ KEEP (*(EXCLUDE_FILE (*crtend.o ) .ctors))
+ KEEP (*(SORT(.ctors.*)))
+ KEEP (*(.ctors))
+ }
+ .dtors : {
+ KEEP (*crtbegin.o(.dtors))
+ KEEP (*(EXCLUDE_FILE (*crtend.o ) .dtors))
+ KEEP (*(SORT(.dtors.*)))
+ KEEP (*(.dtors))
+ }
+ .jcr : { KEEP (*(.jcr)) }
+ .got : { *(.got.plt) *(.got) }
+ _edata = .;
+ PROVIDE (edata = .);
+ .bss : {
+ __bss_start = .;
+ *(.dynbss)
+ *(.bss .bss.* .gnu.linkonce.b.*)
+ *(COMMON)
+ /* Align here to ensure that the .bss section occupies space up to
+ _end. Align after .bss to ensure correct alignment even if the
+ .bss section disappears because there are no input sections. */
+ . = ALIGN(32 / 8);
+ . = ALIGN(32 / 8);
+ }
+ _end = .;
+ PROVIDE (end = .);
+
+ STABS_DEBUG
+
+ DWARF_DEBUG
+
+ DISCARDS
+}
diff --git a/arch/um/kernel/early_printk.c b/arch/um/kernel/early_printk.c
new file mode 100644
index 00000000000..ec649bf72f6
--- /dev/null
+++ b/arch/um/kernel/early_printk.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2011 Richard Weinberger <richrd@nod.at>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/console.h>
+#include <linux/init.h>
+#include "os.h"
+
+static void early_console_write(struct console *con, const char *s, unsigned int n)
+{
+ um_early_printk(s, n);
+}
+
+static struct console early_console = {
+ .name = "earlycon",
+ .write = early_console_write,
+ .flags = CON_BOOT,
+ .index = -1,
+};
+
+static int __init setup_early_printk(char *buf)
+{
+ register_console(&early_console);
+
+ return 0;
+}
+
+early_param("earlyprintk", setup_early_printk);
diff --git a/arch/um/kernel/exec.c b/arch/um/kernel/exec.c
new file mode 100644
index 00000000000..6cade936636
--- /dev/null
+++ b/arch/um/kernel/exec.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/fs.h>
+#include <linux/ptrace.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <asm/current.h>
+#include <asm/processor.h>
+#include <asm/uaccess.h>
+#include "as-layout.h"
+#include "mem_user.h"
+#include "skas.h"
+#include "os.h"
+#include "internal.h"
+
+void flush_thread(void)
+{
+ void *data = NULL;
+ int ret;
+
+ arch_flush_thread(&current->thread.arch);
+
+ ret = unmap(&current->mm->context.id, 0, STUB_START, 0, &data);
+ ret = ret || unmap(&current->mm->context.id, STUB_END,
+ host_task_size - STUB_END, 1, &data);
+ if (ret) {
+ printk(KERN_ERR "flush_thread - clearing address space failed, "
+ "err = %d\n", ret);
+ force_sig(SIGKILL, current);
+ }
+
+ __switch_mm(&current->mm->context.id);
+}
+
+void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
+{
+ PT_REGS_IP(regs) = eip;
+ PT_REGS_SP(regs) = esp;
+}
+EXPORT_SYMBOL(start_thread);
+
+static long execve1(const char *file,
+ const char __user *const __user *argv,
+ const char __user *const __user *env)
+{
+ long error;
+
+ error = do_execve(file, argv, env, &current->thread.regs);
+ if (error == 0) {
+ task_lock(current);
+ current->ptrace &= ~PT_DTRACE;
+#ifdef SUBARCH_EXECVE1
+ SUBARCH_EXECVE1(&current->thread.regs.regs);
+#endif
+ task_unlock(current);
+ }
+ return error;
+}
+
+long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env)
+{
+ long err;
+
+ err = execve1(file, argv, env);
+ if (!err)
+ UML_LONGJMP(current->thread.exec_buf, 1);
+ return err;
+}
+
+long sys_execve(const char __user *file, const char __user *const __user *argv,
+ const char __user *const __user *env)
+{
+ long error;
+ char *filename;
+
+ filename = getname(file);
+ error = PTR_ERR(filename);
+ if (IS_ERR(filename)) goto out;
+ error = execve1(filename, argv, env);
+ putname(filename);
+ out:
+ return error;
+}
diff --git a/arch/um/kernel/exitcode.c b/arch/um/kernel/exitcode.c
new file mode 100644
index 00000000000..829df49dee9
--- /dev/null
+++ b/arch/um/kernel/exitcode.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/ctype.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
+
+/*
+ * If read and write race, the read will still atomically read a valid
+ * value.
+ */
+int uml_exitcode = 0;
+
+static int exitcode_proc_show(struct seq_file *m, void *v)
+{
+ int val;
+
+ /*
+ * Save uml_exitcode in a local so that we don't need to guarantee
+ * that sprintf accesses it atomically.
+ */
+ val = uml_exitcode;
+ seq_printf(m, "%d\n", val);
+ return 0;
+}
+
+static int exitcode_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, exitcode_proc_show, NULL);
+}
+
+static ssize_t exitcode_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
+{
+ char *end, buf[sizeof("nnnnn\0")];
+ int tmp;
+
+ if (copy_from_user(buf, buffer, count))
+ return -EFAULT;
+
+ tmp = simple_strtol(buf, &end, 0);
+ if ((*end != '\0') && !isspace(*end))
+ return -EINVAL;
+
+ uml_exitcode = tmp;
+ return count;
+}
+
+static const struct file_operations exitcode_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = exitcode_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = exitcode_proc_write,
+};
+
+static int make_proc_exitcode(void)
+{
+ struct proc_dir_entry *ent;
+
+ ent = proc_create("exitcode", 0600, NULL, &exitcode_proc_fops);
+ if (ent == NULL) {
+ printk(KERN_WARNING "make_proc_exitcode : Failed to register "
+ "/proc/exitcode\n");
+ return 0;
+ }
+ return 0;
+}
+
+__initcall(make_proc_exitcode);
diff --git a/arch/um/kernel/gmon_syms.c b/arch/um/kernel/gmon_syms.c
new file mode 100644
index 00000000000..e9bcf247bce
--- /dev/null
+++ b/arch/um/kernel/gmon_syms.c
@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/module.h"
+
+extern void __bb_init_func(void *) __attribute__((weak));
+EXPORT_SYMBOL(__bb_init_func);
diff --git a/arch/um/kernel/gprof_syms.c b/arch/um/kernel/gprof_syms.c
new file mode 100644
index 00000000000..e2f043d0de6
--- /dev/null
+++ b/arch/um/kernel/gprof_syms.c
@@ -0,0 +1,9 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/module.h"
+
+extern void mcount(void);
+EXPORT_SYMBOL(mcount);
diff --git a/arch/um/kernel/init_task.c b/arch/um/kernel/init_task.c
new file mode 100644
index 00000000000..ddc9698b66e
--- /dev/null
+++ b/arch/um/kernel/init_task.c
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,intel.linux}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/sched.h"
+#include "linux/init_task.h"
+#include "linux/fs.h"
+#include "linux/module.h"
+#include "linux/mqueue.h"
+#include "asm/uaccess.h"
+
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
+static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
+/*
+ * Initial task structure.
+ *
+ * All other task structs will be allocated on slabs in fork.c
+ */
+
+struct task_struct init_task = INIT_TASK(init_task);
+
+EXPORT_SYMBOL(init_task);
+
+/*
+ * Initial thread structure.
+ *
+ * We need to make sure that this is aligned due to the
+ * way process stacks are handled. This is done by having a special
+ * "init_task" linker map entry..
+ */
+
+union thread_union init_thread_union __init_task_data =
+ { INIT_THREAD_INFO(init_task) };
+
+union thread_union cpu0_irqstack
+ __attribute__((__section__(".data..init_irqstack"))) =
+ { INIT_THREAD_INFO(init_task) };
diff --git a/arch/um/kernel/initrd.c b/arch/um/kernel/initrd.c
new file mode 100644
index 00000000000..10cc18f729f
--- /dev/null
+++ b/arch/um/kernel/initrd.c
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/init.h"
+#include "linux/bootmem.h"
+#include "linux/initrd.h"
+#include "asm/types.h"
+#include "init.h"
+#include "os.h"
+
+/* Changed by uml_initrd_setup, which is a setup */
+static char *initrd __initdata = NULL;
+static int load_initrd(char *filename, void *buf, int size);
+
+static int __init read_initrd(void)
+{
+ void *area;
+ long long size;
+ int err;
+
+ if (initrd == NULL)
+ return 0;
+
+ err = os_file_size(initrd, &size);
+ if (err)
+ return 0;
+
+ /*
+ * This is necessary because alloc_bootmem craps out if you
+ * ask for no memory.
+ */
+ if (size == 0) {
+ printk(KERN_ERR "\"%s\" is a zero-size initrd\n", initrd);
+ return 0;
+ }
+
+ area = alloc_bootmem(size);
+ if (area == NULL)
+ return 0;
+
+ if (load_initrd(initrd, area, size) == -1)
+ return 0;
+
+ initrd_start = (unsigned long) area;
+ initrd_end = initrd_start + size;
+ return 0;
+}
+
+__uml_postsetup(read_initrd);
+
+static int __init uml_initrd_setup(char *line, int *add)
+{
+ initrd = line;
+ return 0;
+}
+
+__uml_setup("initrd=", uml_initrd_setup,
+"initrd=<initrd image>\n"
+" This is used to boot UML from an initrd image. The argument is the\n"
+" name of the file containing the image.\n\n"
+);
+
+static int load_initrd(char *filename, void *buf, int size)
+{
+ int fd, n;
+
+ fd = os_open_file(filename, of_read(OPENFLAGS()), 0);
+ if (fd < 0) {
+ printk(KERN_ERR "Opening '%s' failed - err = %d\n", filename,
+ -fd);
+ return -1;
+ }
+ n = os_read_file(fd, buf, size);
+ if (n != size) {
+ printk(KERN_ERR "Read of %d bytes from '%s' failed, "
+ "err = %d\n", size,
+ filename, -n);
+ return -1;
+ }
+
+ os_close_file(fd);
+ return 0;
+}
diff --git a/arch/um/kernel/internal.h b/arch/um/kernel/internal.h
new file mode 100644
index 00000000000..5bf97db24a0
--- /dev/null
+++ b/arch/um/kernel/internal.h
@@ -0,0 +1 @@
+extern long um_execve(const char *file, const char __user *const __user *argv, const char __user *const __user *env);
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
new file mode 100644
index 00000000000..71b8c947e5e
--- /dev/null
+++ b/arch/um/kernel/irq.c
@@ -0,0 +1,464 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ * Derived (i.e. mostly copied) from arch/i386/kernel/irq.c:
+ * Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
+ */
+
+#include "linux/cpumask.h"
+#include "linux/hardirq.h"
+#include "linux/interrupt.h"
+#include "linux/kernel_stat.h"
+#include "linux/module.h"
+#include "linux/sched.h"
+#include "linux/seq_file.h"
+#include "linux/slab.h"
+#include "as-layout.h"
+#include "kern_util.h"
+#include "os.h"
+
+/*
+ * This list is accessed under irq_lock, except in sigio_handler,
+ * where it is safe from being modified. IRQ handlers won't change it -
+ * if an IRQ source has vanished, it will be freed by free_irqs just
+ * before returning from sigio_handler. That will process a separate
+ * list of irqs to free, with its own locking, coming back here to
+ * remove list elements, taking the irq_lock to do so.
+ */
+static struct irq_fd *active_fds = NULL;
+static struct irq_fd **last_irq_ptr = &active_fds;
+
+extern void free_irqs(void);
+
+void sigio_handler(int sig, struct uml_pt_regs *regs)
+{
+ struct irq_fd *irq_fd;
+ int n;
+
+ if (smp_sigio_handler())
+ return;
+
+ while (1) {
+ n = os_waiting_for_events(active_fds);
+ if (n <= 0) {
+ if (n == -EINTR)
+ continue;
+ else break;
+ }
+
+ for (irq_fd = active_fds; irq_fd != NULL;
+ irq_fd = irq_fd->next) {
+ if (irq_fd->current_events != 0) {
+ irq_fd->current_events = 0;
+ do_IRQ(irq_fd->irq, regs);
+ }
+ }
+ }
+
+ free_irqs();
+}
+
+static DEFINE_SPINLOCK(irq_lock);
+
+static int activate_fd(int irq, int fd, int type, void *dev_id)
+{
+ struct pollfd *tmp_pfd;
+ struct irq_fd *new_fd, *irq_fd;
+ unsigned long flags;
+ int events, err, n;
+
+ err = os_set_fd_async(fd);
+ if (err < 0)
+ goto out;
+
+ err = -ENOMEM;
+ new_fd = kmalloc(sizeof(struct irq_fd), GFP_KERNEL);
+ if (new_fd == NULL)
+ goto out;
+
+ if (type == IRQ_READ)
+ events = UM_POLLIN | UM_POLLPRI;
+ else events = UM_POLLOUT;
+ *new_fd = ((struct irq_fd) { .next = NULL,
+ .id = dev_id,
+ .fd = fd,
+ .type = type,
+ .irq = irq,
+ .events = events,
+ .current_events = 0 } );
+
+ err = -EBUSY;
+ spin_lock_irqsave(&irq_lock, flags);
+ for (irq_fd = active_fds; irq_fd != NULL; irq_fd = irq_fd->next) {
+ if ((irq_fd->fd == fd) && (irq_fd->type == type)) {
+ printk(KERN_ERR "Registering fd %d twice\n", fd);
+ printk(KERN_ERR "Irqs : %d, %d\n", irq_fd->irq, irq);
+ printk(KERN_ERR "Ids : 0x%p, 0x%p\n", irq_fd->id,
+ dev_id);
+ goto out_unlock;
+ }
+ }
+
+ if (type == IRQ_WRITE)
+ fd = -1;
+
+ tmp_pfd = NULL;
+ n = 0;
+
+ while (1) {
+ n = os_create_pollfd(fd, events, tmp_pfd, n);
+ if (n == 0)
+ break;
+
+ /*
+ * n > 0
+ * It means we couldn't put new pollfd to current pollfds
+ * and tmp_fds is NULL or too small for new pollfds array.
+ * Needed size is equal to n as minimum.
+ *
+ * Here we have to drop the lock in order to call
+ * kmalloc, which might sleep.
+ * If something else came in and changed the pollfds array
+ * so we will not be able to put new pollfd struct to pollfds
+ * then we free the buffer tmp_fds and try again.
+ */
+ spin_unlock_irqrestore(&irq_lock, flags);
+ kfree(tmp_pfd);
+
+ tmp_pfd = kmalloc(n, GFP_KERNEL);
+ if (tmp_pfd == NULL)
+ goto out_kfree;
+
+ spin_lock_irqsave(&irq_lock, flags);
+ }
+
+ *last_irq_ptr = new_fd;
+ last_irq_ptr = &new_fd->next;
+
+ spin_unlock_irqrestore(&irq_lock, flags);
+
+ /*
+ * This calls activate_fd, so it has to be outside the critical
+ * section.
+ */
+ maybe_sigio_broken(fd, (type == IRQ_READ));
+
+ return 0;
+
+ out_unlock:
+ spin_unlock_irqrestore(&irq_lock, flags);
+ out_kfree:
+ kfree(new_fd);
+ out:
+ return err;
+}
+
+static void free_irq_by_cb(int (*test)(struct irq_fd *, void *), void *arg)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&irq_lock, flags);
+ os_free_irq_by_cb(test, arg, active_fds, &last_irq_ptr);
+ spin_unlock_irqrestore(&irq_lock, flags);
+}
+
+struct irq_and_dev {
+ int irq;
+ void *dev;
+};
+
+static int same_irq_and_dev(struct irq_fd *irq, void *d)
+{
+ struct irq_and_dev *data = d;
+
+ return ((irq->irq == data->irq) && (irq->id == data->dev));
+}
+
+static void free_irq_by_irq_and_dev(unsigned int irq, void *dev)
+{
+ struct irq_and_dev data = ((struct irq_and_dev) { .irq = irq,
+ .dev = dev });
+
+ free_irq_by_cb(same_irq_and_dev, &data);
+}
+
+static int same_fd(struct irq_fd *irq, void *fd)
+{
+ return (irq->fd == *((int *)fd));
+}
+
+void free_irq_by_fd(int fd)
+{
+ free_irq_by_cb(same_fd, &fd);
+}
+
+/* Must be called with irq_lock held */
+static struct irq_fd *find_irq_by_fd(int fd, int irqnum, int *index_out)
+{
+ struct irq_fd *irq;
+ int i = 0;
+ int fdi;
+
+ for (irq = active_fds; irq != NULL; irq = irq->next) {
+ if ((irq->fd == fd) && (irq->irq == irqnum))
+ break;
+ i++;
+ }
+ if (irq == NULL) {
+ printk(KERN_ERR "find_irq_by_fd doesn't have descriptor %d\n",
+ fd);
+ goto out;
+ }
+ fdi = os_get_pollfd(i);
+ if ((fdi != -1) && (fdi != fd)) {
+ printk(KERN_ERR "find_irq_by_fd - mismatch between active_fds "
+ "and pollfds, fd %d vs %d, need %d\n", irq->fd,
+ fdi, fd);
+ irq = NULL;
+ goto out;
+ }
+ *index_out = i;
+ out:
+ return irq;
+}
+
+void reactivate_fd(int fd, int irqnum)
+{
+ struct irq_fd *irq;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&irq_lock, flags);
+ irq = find_irq_by_fd(fd, irqnum, &i);
+ if (irq == NULL) {
+ spin_unlock_irqrestore(&irq_lock, flags);
+ return;
+ }
+ os_set_pollfd(i, irq->fd);
+ spin_unlock_irqrestore(&irq_lock, flags);
+
+ add_sigio_fd(fd);
+}
+
+void deactivate_fd(int fd, int irqnum)
+{
+ struct irq_fd *irq;
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&irq_lock, flags);
+ irq = find_irq_by_fd(fd, irqnum, &i);
+ if (irq == NULL) {
+ spin_unlock_irqrestore(&irq_lock, flags);
+ return;
+ }
+
+ os_set_pollfd(i, -1);
+ spin_unlock_irqrestore(&irq_lock, flags);
+
+ ignore_sigio_fd(fd);
+}
+EXPORT_SYMBOL(deactivate_fd);
+
+/*
+ * Called just before shutdown in order to provide a clean exec
+ * environment in case the system is rebooting. No locking because
+ * that would cause a pointless shutdown hang if something hadn't
+ * released the lock.
+ */
+int deactivate_all_fds(void)
+{
+ struct irq_fd *irq;
+ int err;
+
+ for (irq = active_fds; irq != NULL; irq = irq->next) {
+ err = os_clear_fd_async(irq->fd);
+ if (err)
+ return err;
+ }
+ /* If there is a signal already queued, after unblocking ignore it */
+ os_set_ioignore();
+
+ return 0;
+}
+
+/*
+ * do_IRQ handles all normal device IRQs (the special
+ * SMP cross-CPU interrupts have their own specific
+ * handlers).
+ */
+unsigned int do_IRQ(int irq, struct uml_pt_regs *regs)
+{
+ struct pt_regs *old_regs = set_irq_regs((struct pt_regs *)regs);
+ irq_enter();
+ generic_handle_irq(irq);
+ irq_exit();
+ set_irq_regs(old_regs);
+ return 1;
+}
+
+int um_request_irq(unsigned int irq, int fd, int type,
+ irq_handler_t handler,
+ unsigned long irqflags, const char * devname,
+ void *dev_id)
+{
+ int err;
+
+ if (fd != -1) {
+ err = activate_fd(irq, fd, type, dev_id);
+ if (err)
+ return err;
+ }
+
+ return request_irq(irq, handler, irqflags, devname, dev_id);
+}
+
+EXPORT_SYMBOL(um_request_irq);
+EXPORT_SYMBOL(reactivate_fd);
+
+/*
+ * irq_chip must define at least enable/disable and ack when
+ * the edge handler is used.
+ */
+static void dummy(struct irq_data *d)
+{
+}
+
+/* This is used for everything else than the timer. */
+static struct irq_chip normal_irq_type = {
+ .name = "SIGIO",
+ .release = free_irq_by_irq_and_dev,
+ .irq_disable = dummy,
+ .irq_enable = dummy,
+ .irq_ack = dummy,
+};
+
+static struct irq_chip SIGVTALRM_irq_type = {
+ .name = "SIGVTALRM",
+ .release = free_irq_by_irq_and_dev,
+ .irq_disable = dummy,
+ .irq_enable = dummy,
+ .irq_ack = dummy,
+};
+
+void __init init_IRQ(void)
+{
+ int i;
+
+ irq_set_chip_and_handler(TIMER_IRQ, &SIGVTALRM_irq_type, handle_edge_irq);
+
+ for (i = 1; i < NR_IRQS; i++)
+ irq_set_chip_and_handler(i, &normal_irq_type, handle_edge_irq);
+}
+
+/*
+ * IRQ stack entry and exit:
+ *
+ * Unlike i386, UML doesn't receive IRQs on the normal kernel stack
+ * and switch over to the IRQ stack after some preparation. We use
+ * sigaltstack to receive signals on a separate stack from the start.
+ * These two functions make sure the rest of the kernel won't be too
+ * upset by being on a different stack. The IRQ stack has a
+ * thread_info structure at the bottom so that current et al continue
+ * to work.
+ *
+ * to_irq_stack copies the current task's thread_info to the IRQ stack
+ * thread_info and sets the tasks's stack to point to the IRQ stack.
+ *
+ * from_irq_stack copies the thread_info struct back (flags may have
+ * been modified) and resets the task's stack pointer.
+ *
+ * Tricky bits -
+ *
+ * What happens when two signals race each other? UML doesn't block
+ * signals with sigprocmask, SA_DEFER, or sa_mask, so a second signal
+ * could arrive while a previous one is still setting up the
+ * thread_info.
+ *
+ * There are three cases -
+ * The first interrupt on the stack - sets up the thread_info and
+ * handles the interrupt
+ * A nested interrupt interrupting the copying of the thread_info -
+ * can't handle the interrupt, as the stack is in an unknown state
+ * A nested interrupt not interrupting the copying of the
+ * thread_info - doesn't do any setup, just handles the interrupt
+ *
+ * The first job is to figure out whether we interrupted stack setup.
+ * This is done by xchging the signal mask with thread_info->pending.
+ * If the value that comes back is zero, then there is no setup in
+ * progress, and the interrupt can be handled. If the value is
+ * non-zero, then there is stack setup in progress. In order to have
+ * the interrupt handled, we leave our signal in the mask, and it will
+ * be handled by the upper handler after it has set up the stack.
+ *
+ * Next is to figure out whether we are the outer handler or a nested
+ * one. As part of setting up the stack, thread_info->real_thread is
+ * set to non-NULL (and is reset to NULL on exit). This is the
+ * nesting indicator. If it is non-NULL, then the stack is already
+ * set up and the handler can run.
+ */
+
+static unsigned long pending_mask;
+
+unsigned long to_irq_stack(unsigned long *mask_out)
+{
+ struct thread_info *ti;
+ unsigned long mask, old;
+ int nested;
+
+ mask = xchg(&pending_mask, *mask_out);
+ if (mask != 0) {
+ /*
+ * If any interrupts come in at this point, we want to
+ * make sure that their bits aren't lost by our
+ * putting our bit in. So, this loop accumulates bits
+ * until xchg returns the same value that we put in.
+ * When that happens, there were no new interrupts,
+ * and pending_mask contains a bit for each interrupt
+ * that came in.
+ */
+ old = *mask_out;
+ do {
+ old |= mask;
+ mask = xchg(&pending_mask, old);
+ } while (mask != old);
+ return 1;
+ }
+
+ ti = current_thread_info();
+ nested = (ti->real_thread != NULL);
+ if (!nested) {
+ struct task_struct *task;
+ struct thread_info *tti;
+
+ task = cpu_tasks[ti->cpu].task;
+ tti = task_thread_info(task);
+
+ *ti = *tti;
+ ti->real_thread = tti;
+ task->stack = ti;
+ }
+
+ mask = xchg(&pending_mask, 0);
+ *mask_out |= mask | nested;
+ return 0;
+}
+
+unsigned long from_irq_stack(int nested)
+{
+ struct thread_info *ti, *to;
+ unsigned long mask;
+
+ ti = current_thread_info();
+
+ pending_mask = 1;
+
+ to = ti->real_thread;
+ current->stack = to;
+ ti->real_thread = NULL;
+ *to = *ti;
+
+ mask = xchg(&pending_mask, 0);
+ return mask & ~1;
+}
+
diff --git a/arch/um/kernel/ksyms.c b/arch/um/kernel/ksyms.c
new file mode 100644
index 00000000000..e17bea0b22e
--- /dev/null
+++ b/arch/um/kernel/ksyms.c
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/module.h>
+#include "os.h"
+
+EXPORT_SYMBOL(set_signals);
+EXPORT_SYMBOL(get_signals);
+
+EXPORT_SYMBOL(os_stat_fd);
+EXPORT_SYMBOL(os_stat_file);
+EXPORT_SYMBOL(os_access);
+EXPORT_SYMBOL(os_set_exec_close);
+EXPORT_SYMBOL(os_getpid);
+EXPORT_SYMBOL(os_open_file);
+EXPORT_SYMBOL(os_read_file);
+EXPORT_SYMBOL(os_write_file);
+EXPORT_SYMBOL(os_seek_file);
+EXPORT_SYMBOL(os_lock_file);
+EXPORT_SYMBOL(os_ioctl_generic);
+EXPORT_SYMBOL(os_pipe);
+EXPORT_SYMBOL(os_file_type);
+EXPORT_SYMBOL(os_file_mode);
+EXPORT_SYMBOL(os_file_size);
+EXPORT_SYMBOL(os_flush_stdout);
+EXPORT_SYMBOL(os_close_file);
+EXPORT_SYMBOL(os_set_fd_async);
+EXPORT_SYMBOL(os_set_fd_block);
+EXPORT_SYMBOL(helper_wait);
+EXPORT_SYMBOL(os_shutdown_socket);
+EXPORT_SYMBOL(os_create_unix_socket);
+EXPORT_SYMBOL(os_connect_socket);
+EXPORT_SYMBOL(os_accept_connection);
+EXPORT_SYMBOL(os_rcv_fd);
+EXPORT_SYMBOL(run_helper);
+EXPORT_SYMBOL(os_major);
+EXPORT_SYMBOL(os_minor);
+EXPORT_SYMBOL(os_makedev);
+
+EXPORT_SYMBOL(add_sigio_fd);
+EXPORT_SYMBOL(ignore_sigio_fd);
+EXPORT_SYMBOL(sigio_broken);
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
new file mode 100644
index 00000000000..ebb86b21844
--- /dev/null
+++ b/arch/um/kernel/mem.c
@@ -0,0 +1,322 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/stddef.h>
+#include <linux/module.h>
+#include <linux/bootmem.h>
+#include <linux/highmem.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <asm/fixmap.h>
+#include <asm/page.h>
+#include "as-layout.h"
+#include "init.h"
+#include "kern.h"
+#include "kern_util.h"
+#include "mem_user.h"
+#include "os.h"
+
+/* allocated in paging_init, zeroed in mem_init, and unchanged thereafter */
+unsigned long *empty_zero_page = NULL;
+EXPORT_SYMBOL(empty_zero_page);
+/* allocated in paging_init and unchanged thereafter */
+static unsigned long *empty_bad_page = NULL;
+
+/*
+ * Initialized during boot, and readonly for initializing page tables
+ * afterwards
+ */
+pgd_t swapper_pg_dir[PTRS_PER_PGD];
+
+/* Initialized at boot time, and readonly after that */
+unsigned long long highmem;
+int kmalloc_ok = 0;
+
+/* Used during early boot */
+static unsigned long brk_end;
+
+#ifdef CONFIG_HIGHMEM
+static void setup_highmem(unsigned long highmem_start,
+ unsigned long highmem_len)
+{
+ struct page *page;
+ unsigned long highmem_pfn;
+ int i;
+
+ highmem_pfn = __pa(highmem_start) >> PAGE_SHIFT;
+ for (i = 0; i < highmem_len >> PAGE_SHIFT; i++) {
+ page = &mem_map[highmem_pfn + i];
+ ClearPageReserved(page);
+ init_page_count(page);
+ __free_page(page);
+ }
+}
+#endif
+
+void __init mem_init(void)
+{
+ /* clear the zero-page */
+ memset(empty_zero_page, 0, PAGE_SIZE);
+
+ /* Map in the area just after the brk now that kmalloc is about
+ * to be turned on.
+ */
+ brk_end = (unsigned long) UML_ROUND_UP(sbrk(0));
+ map_memory(brk_end, __pa(brk_end), uml_reserved - brk_end, 1, 1, 0);
+ free_bootmem(__pa(brk_end), uml_reserved - brk_end);
+ uml_reserved = brk_end;
+
+ /* this will put all low memory onto the freelists */
+ totalram_pages = free_all_bootmem();
+ max_low_pfn = totalram_pages;
+#ifdef CONFIG_HIGHMEM
+ totalhigh_pages = highmem >> PAGE_SHIFT;
+ totalram_pages += totalhigh_pages;
+#endif
+ num_physpages = totalram_pages;
+ max_pfn = totalram_pages;
+ printk(KERN_INFO "Memory: %luk available\n",
+ nr_free_pages() << (PAGE_SHIFT-10));
+ kmalloc_ok = 1;
+
+#ifdef CONFIG_HIGHMEM
+ setup_highmem(end_iomem, highmem);
+#endif
+}
+
+/*
+ * Create a page table and place a pointer to it in a middle page
+ * directory entry.
+ */
+static void __init one_page_table_init(pmd_t *pmd)
+{
+ if (pmd_none(*pmd)) {
+ pte_t *pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ set_pmd(pmd, __pmd(_KERNPG_TABLE +
+ (unsigned long) __pa(pte)));
+ if (pte != pte_offset_kernel(pmd, 0))
+ BUG();
+ }
+}
+
+static void __init one_md_table_init(pud_t *pud)
+{
+#ifdef CONFIG_3_LEVEL_PGTABLES
+ pmd_t *pmd_table = (pmd_t *) alloc_bootmem_low_pages(PAGE_SIZE);
+ set_pud(pud, __pud(_KERNPG_TABLE + (unsigned long) __pa(pmd_table)));
+ if (pmd_table != pmd_offset(pud, 0))
+ BUG();
+#endif
+}
+
+static void __init fixrange_init(unsigned long start, unsigned long end,
+ pgd_t *pgd_base)
+{
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ int i, j;
+ unsigned long vaddr;
+
+ vaddr = start;
+ i = pgd_index(vaddr);
+ j = pmd_index(vaddr);
+ pgd = pgd_base + i;
+
+ for ( ; (i < PTRS_PER_PGD) && (vaddr < end); pgd++, i++) {
+ pud = pud_offset(pgd, vaddr);
+ if (pud_none(*pud))
+ one_md_table_init(pud);
+ pmd = pmd_offset(pud, vaddr);
+ for (; (j < PTRS_PER_PMD) && (vaddr < end); pmd++, j++) {
+ one_page_table_init(pmd);
+ vaddr += PMD_SIZE;
+ }
+ j = 0;
+ }
+}
+
+#ifdef CONFIG_HIGHMEM
+pte_t *kmap_pte;
+pgprot_t kmap_prot;
+
+#define kmap_get_fixmap_pte(vaddr) \
+ pte_offset_kernel(pmd_offset(pud_offset(pgd_offset_k(vaddr), (vaddr)),\
+ (vaddr)), (vaddr))
+
+static void __init kmap_init(void)
+{
+ unsigned long kmap_vstart;
+
+ /* cache the first kmap pte */
+ kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN);
+ kmap_pte = kmap_get_fixmap_pte(kmap_vstart);
+
+ kmap_prot = PAGE_KERNEL;
+}
+
+static void __init init_highmem(void)
+{
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ unsigned long vaddr;
+
+ /*
+ * Permanent kmaps:
+ */
+ vaddr = PKMAP_BASE;
+ fixrange_init(vaddr, vaddr + PAGE_SIZE*LAST_PKMAP, swapper_pg_dir);
+
+ pgd = swapper_pg_dir + pgd_index(vaddr);
+ pud = pud_offset(pgd, vaddr);
+ pmd = pmd_offset(pud, vaddr);
+ pte = pte_offset_kernel(pmd, vaddr);
+ pkmap_page_table = pte;
+
+ kmap_init();
+}
+#endif /* CONFIG_HIGHMEM */
+
+static void __init fixaddr_user_init( void)
+{
+#ifdef CONFIG_ARCH_REUSE_HOST_VSYSCALL_AREA
+ long size = FIXADDR_USER_END - FIXADDR_USER_START;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ pte_t *pte;
+ phys_t p;
+ unsigned long v, vaddr = FIXADDR_USER_START;
+
+ if (!size)
+ return;
+
+ fixrange_init( FIXADDR_USER_START, FIXADDR_USER_END, swapper_pg_dir);
+ v = (unsigned long) alloc_bootmem_low_pages(size);
+ memcpy((void *) v , (void *) FIXADDR_USER_START, size);
+ p = __pa(v);
+ for ( ; size > 0; size -= PAGE_SIZE, vaddr += PAGE_SIZE,
+ p += PAGE_SIZE) {
+ pgd = swapper_pg_dir + pgd_index(vaddr);
+ pud = pud_offset(pgd, vaddr);
+ pmd = pmd_offset(pud, vaddr);
+ pte = pte_offset_kernel(pmd, vaddr);
+ pte_set_val(*pte, p, PAGE_READONLY);
+ }
+#endif
+}
+
+void __init paging_init(void)
+{
+ unsigned long zones_size[MAX_NR_ZONES], vaddr;
+ int i;
+
+ empty_zero_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
+ empty_bad_page = (unsigned long *) alloc_bootmem_low_pages(PAGE_SIZE);
+ for (i = 0; i < ARRAY_SIZE(zones_size); i++)
+ zones_size[i] = 0;
+
+ zones_size[ZONE_NORMAL] = (end_iomem >> PAGE_SHIFT) -
+ (uml_physmem >> PAGE_SHIFT);
+#ifdef CONFIG_HIGHMEM
+ zones_size[ZONE_HIGHMEM] = highmem >> PAGE_SHIFT;
+#endif
+ free_area_init(zones_size);
+
+ /*
+ * Fixed mappings, only the page table structure has to be
+ * created - mappings will be set by set_fixmap():
+ */
+ vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK;
+ fixrange_init(vaddr, FIXADDR_TOP, swapper_pg_dir);
+
+ fixaddr_user_init();
+
+#ifdef CONFIG_HIGHMEM
+ init_highmem();
+#endif
+}
+
+/*
+ * This can't do anything because nothing in the kernel image can be freed
+ * since it's not in kernel physical memory.
+ */
+
+void free_initmem(void)
+{
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+ if (start < end)
+ printk(KERN_INFO "Freeing initrd memory: %ldk freed\n",
+ (end - start) >> 10);
+ for (; start < end; start += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(start));
+ init_page_count(virt_to_page(start));
+ free_page(start);
+ totalram_pages++;
+ }
+}
+#endif
+
+/* Allocate and free page tables. */
+
+pgd_t *pgd_alloc(struct mm_struct *mm)
+{
+ pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL);
+
+ if (pgd) {
+ memset(pgd, 0, USER_PTRS_PER_PGD * sizeof(pgd_t));
+ memcpy(pgd + USER_PTRS_PER_PGD,
+ swapper_pg_dir + USER_PTRS_PER_PGD,
+ (PTRS_PER_PGD - USER_PTRS_PER_PGD) * sizeof(pgd_t));
+ }
+ return pgd;
+}
+
+void pgd_free(struct mm_struct *mm, pgd_t *pgd)
+{
+ free_page((unsigned long) pgd);
+}
+
+pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
+{
+ pte_t *pte;
+
+ pte = (pte_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+ return pte;
+}
+
+pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ struct page *pte;
+
+ pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
+ if (pte)
+ pgtable_page_ctor(pte);
+ return pte;
+}
+
+#ifdef CONFIG_3_LEVEL_PGTABLES
+pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address)
+{
+ pmd_t *pmd = (pmd_t *) __get_free_page(GFP_KERNEL);
+
+ if (pmd)
+ memset(pmd, 0, PAGE_SIZE);
+
+ return pmd;
+}
+#endif
+
+void *uml_kmalloc(int size, int flags)
+{
+ return kmalloc(size, flags);
+}
diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
new file mode 100644
index 00000000000..f116db15d40
--- /dev/null
+++ b/arch/um/kernel/physmem.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include <linux/module.h>
+#include <linux/bootmem.h>
+#include <linux/mm.h>
+#include <linux/pfn.h>
+#include <asm/page.h>
+#include <as-layout.h>
+#include <init.h>
+#include <kern.h>
+#include <mem_user.h>
+#include <os.h>
+
+static int physmem_fd = -1;
+
+/* Changed during early boot */
+unsigned long high_physmem;
+EXPORT_SYMBOL(high_physmem);
+
+extern unsigned long long physmem_size;
+
+int __init init_maps(unsigned long physmem, unsigned long iomem,
+ unsigned long highmem)
+{
+ struct page *p, *map;
+ unsigned long phys_len, phys_pages, highmem_len, highmem_pages;
+ unsigned long iomem_len, iomem_pages, total_len, total_pages;
+ int i;
+
+ phys_pages = physmem >> PAGE_SHIFT;
+ phys_len = phys_pages * sizeof(struct page);
+
+ iomem_pages = iomem >> PAGE_SHIFT;
+ iomem_len = iomem_pages * sizeof(struct page);
+
+ highmem_pages = highmem >> PAGE_SHIFT;
+ highmem_len = highmem_pages * sizeof(struct page);
+
+ total_pages = phys_pages + iomem_pages + highmem_pages;
+ total_len = phys_len + iomem_len + highmem_len;
+
+ map = alloc_bootmem_low_pages(total_len);
+ if (map == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < total_pages; i++) {
+ p = &map[i];
+ memset(p, 0, sizeof(struct page));
+ SetPageReserved(p);
+ INIT_LIST_HEAD(&p->lru);
+ }
+
+ max_mapnr = total_pages;
+ return 0;
+}
+
+void map_memory(unsigned long virt, unsigned long phys, unsigned long len,
+ int r, int w, int x)
+{
+ __u64 offset;
+ int fd, err;
+
+ fd = phys_mapping(phys, &offset);
+ err = os_map_memory((void *) virt, fd, offset, len, r, w, x);
+ if (err) {
+ if (err == -ENOMEM)
+ printk(KERN_ERR "try increasing the host's "
+ "/proc/sys/vm/max_map_count to <physical "
+ "memory size>/4096\n");
+ panic("map_memory(0x%lx, %d, 0x%llx, %ld, %d, %d, %d) failed, "
+ "err = %d\n", virt, fd, offset, len, r, w, x, err);
+ }
+}
+
+extern int __syscall_stub_start;
+
+void __init setup_physmem(unsigned long start, unsigned long reserve_end,
+ unsigned long len, unsigned long long highmem)
+{
+ unsigned long reserve = reserve_end - start;
+ int pfn = PFN_UP(__pa(reserve_end));
+ int delta = (len - reserve) >> PAGE_SHIFT;
+ int err, offset, bootmap_size;
+
+ physmem_fd = create_mem_file(len + highmem);
+
+ offset = uml_reserved - uml_physmem;
+ err = os_map_memory((void *) uml_reserved, physmem_fd, offset,
+ len - offset, 1, 1, 1);
+ if (err < 0) {
+ printf("setup_physmem - mapping %ld bytes of memory at 0x%p "
+ "failed - errno = %d\n", len - offset,
+ (void *) uml_reserved, err);
+ exit(1);
+ }
+
+ /*
+ * Special kludge - This page will be mapped in to userspace processes
+ * from physmem_fd, so it needs to be written out there.
+ */
+ os_seek_file(physmem_fd, __pa(&__syscall_stub_start));
+ os_write_file(physmem_fd, &__syscall_stub_start, PAGE_SIZE);
+
+ bootmap_size = init_bootmem(pfn, pfn + delta);
+ free_bootmem(__pa(reserve_end) + bootmap_size,
+ len - bootmap_size - reserve);
+}
+
+int phys_mapping(unsigned long phys, unsigned long long *offset_out)
+{
+ int fd = -1;
+
+ if (phys < physmem_size) {
+ fd = physmem_fd;
+ *offset_out = phys;
+ }
+ else if (phys < __pa(end_iomem)) {
+ struct iomem_region *region = iomem_regions;
+
+ while (region != NULL) {
+ if ((phys >= region->phys) &&
+ (phys < region->phys + region->size)) {
+ fd = region->fd;
+ *offset_out = phys - region->phys;
+ break;
+ }
+ region = region->next;
+ }
+ }
+ else if (phys < __pa(end_iomem) + highmem) {
+ fd = physmem_fd;
+ *offset_out = phys - iomem_size;
+ }
+
+ return fd;
+}
+
+static int __init uml_mem_setup(char *line, int *add)
+{
+ char *retptr;
+ physmem_size = memparse(line,&retptr);
+ return 0;
+}
+__uml_setup("mem=", uml_mem_setup,
+"mem=<Amount of desired ram>\n"
+" This controls how much \"physical\" memory the kernel allocates\n"
+" for the system. The size is specified as a number followed by\n"
+" one of 'k', 'K', 'm', 'M', which have the obvious meanings.\n"
+" This is not related to the amount of memory in the host. It can\n"
+" be more, and the excess, if it's ever used, will just be swapped out.\n"
+" Example: mem=64M\n\n"
+);
+
+extern int __init parse_iomem(char *str, int *add);
+
+__uml_setup("iomem=", parse_iomem,
+"iomem=<name>,<file>\n"
+" Configure <file> as an IO memory region named <name>.\n\n"
+);
+
+/*
+ * This list is constructed in parse_iomem and addresses filled in in
+ * setup_iomem, both of which run during early boot. Afterwards, it's
+ * unchanged.
+ */
+struct iomem_region *iomem_regions;
+
+/* Initialized in parse_iomem and unchanged thereafter */
+int iomem_size;
+
+unsigned long find_iomem(char *driver, unsigned long *len_out)
+{
+ struct iomem_region *region = iomem_regions;
+
+ while (region != NULL) {
+ if (!strcmp(region->driver, driver)) {
+ *len_out = region->size;
+ return region->virt;
+ }
+
+ region = region->next;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(find_iomem);
+
+static int setup_iomem(void)
+{
+ struct iomem_region *region = iomem_regions;
+ unsigned long iomem_start = high_physmem + PAGE_SIZE;
+ int err;
+
+ while (region != NULL) {
+ err = os_map_memory((void *) iomem_start, region->fd, 0,
+ region->size, 1, 1, 0);
+ if (err)
+ printk(KERN_ERR "Mapping iomem region for driver '%s' "
+ "failed, errno = %d\n", region->driver, -err);
+ else {
+ region->virt = iomem_start;
+ region->phys = __pa(region->virt);
+ }
+
+ iomem_start += region->size + PAGE_SIZE;
+ region = region->next;
+ }
+
+ return 0;
+}
+
+__initcall(setup_iomem);
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
new file mode 100644
index 00000000000..69f24905abd
--- /dev/null
+++ b/arch/um/kernel/process.c
@@ -0,0 +1,468 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Copyright 2003 PathScale, Inc.
+ * Licensed under the GPL
+ */
+
+#include <linux/stddef.h>
+#include <linux/err.h>
+#include <linux/hardirq.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/personality.h>
+#include <linux/proc_fs.h>
+#include <linux/ptrace.h>
+#include <linux/random.h>
+#include <linux/slab.h>
+#include <linux/sched.h>
+#include <linux/seq_file.h>
+#include <linux/tick.h>
+#include <linux/threads.h>
+#include <asm/current.h>
+#include <asm/pgtable.h>
+#include <asm/mmu_context.h>
+#include <asm/uaccess.h>
+#include "as-layout.h"
+#include "kern_util.h"
+#include "os.h"
+#include "skas.h"
+
+/*
+ * This is a per-cpu array. A processor only modifies its entry and it only
+ * cares about its entry, so it's OK if another processor is modifying its
+ * entry.
+ */
+struct cpu_task cpu_tasks[NR_CPUS] = { [0 ... NR_CPUS - 1] = { -1, NULL } };
+
+static inline int external_pid(void)
+{
+ /* FIXME: Need to look up userspace_pid by cpu */
+ return userspace_pid[0];
+}
+
+int pid_to_processor_id(int pid)
+{
+ int i;
+
+ for (i = 0; i < ncpus; i++) {
+ if (cpu_tasks[i].pid == pid)
+ return i;
+ }
+ return -1;
+}
+
+void free_stack(unsigned long stack, int order)
+{
+ free_pages(stack, order);
+}
+
+unsigned long alloc_stack(int order, int atomic)
+{
+ unsigned long page;
+ gfp_t flags = GFP_KERNEL;
+
+ if (atomic)
+ flags = GFP_ATOMIC;
+ page = __get_free_pages(flags, order);
+
+ return page;
+}
+
+int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
+{
+ int pid;
+
+ current->thread.request.u.thread.proc = fn;
+ current->thread.request.u.thread.arg = arg;
+ pid = do_fork(CLONE_VM | CLONE_UNTRACED | flags, 0,
+ &current->thread.regs, 0, NULL, NULL);
+ return pid;
+}
+EXPORT_SYMBOL(kernel_thread);
+
+static inline void set_current(struct task_struct *task)
+{
+ cpu_tasks[task_thread_info(task)->cpu] = ((struct cpu_task)
+ { external_pid(), task });
+}
+
+extern void arch_switch_to(struct task_struct *to);
+
+void *_switch_to(void *prev, void *next, void *last)
+{
+ struct task_struct *from = prev;
+ struct task_struct *to = next;
+
+ to->thread.prev_sched = from;
+ set_current(to);
+
+ do {
+ current->thread.saved_task = NULL;
+
+ switch_threads(&from->thread.switch_buf,
+ &to->thread.switch_buf);
+
+ arch_switch_to(current);
+
+ if (current->thread.saved_task)
+ show_regs(&(current->thread.regs));
+ to = current->thread.saved_task;
+ from = current;
+ } while (current->thread.saved_task);
+
+ return current->thread.prev_sched;
+
+}
+
+void interrupt_end(void)
+{
+ if (need_resched())
+ schedule();
+ if (test_tsk_thread_flag(current, TIF_SIGPENDING))
+ do_signal();
+}
+
+void exit_thread(void)
+{
+}
+
+void *get_current(void)
+{
+ return current;
+}
+
+/*
+ * This is called magically, by its address being stuffed in a jmp_buf
+ * and being longjmp-d to.
+ */
+void new_thread_handler(void)
+{
+ int (*fn)(void *), n;
+ void *arg;
+
+ if (current->thread.prev_sched != NULL)
+ schedule_tail(current->thread.prev_sched);
+ current->thread.prev_sched = NULL;
+
+ fn = current->thread.request.u.thread.proc;
+ arg = current->thread.request.u.thread.arg;
+
+ /*
+ * The return value is 1 if the kernel thread execs a process,
+ * 0 if it just exits
+ */
+ n = run_kernel_thread(fn, arg, &current->thread.exec_buf);
+ if (n == 1) {
+ /* Handle any immediate reschedules or signals */
+ interrupt_end();
+ userspace(&current->thread.regs.regs);
+ }
+ else do_exit(0);
+}
+
+/* Called magically, see new_thread_handler above */
+void fork_handler(void)
+{
+ force_flush_all();
+
+ schedule_tail(current->thread.prev_sched);
+
+ /*
+ * XXX: if interrupt_end() calls schedule, this call to
+ * arch_switch_to isn't needed. We could want to apply this to
+ * improve performance. -bb
+ */
+ arch_switch_to(current);
+
+ current->thread.prev_sched = NULL;
+
+ /* Handle any immediate reschedules or signals */
+ interrupt_end();
+
+ userspace(&current->thread.regs.regs);
+}
+
+int copy_thread(unsigned long clone_flags, unsigned long sp,
+ unsigned long stack_top, struct task_struct * p,
+ struct pt_regs *regs)
+{
+ void (*handler)(void);
+ int ret = 0;
+
+ p->thread = (struct thread_struct) INIT_THREAD;
+
+ if (current->thread.forking) {
+ memcpy(&p->thread.regs.regs, &regs->regs,
+ sizeof(p->thread.regs.regs));
+ REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.gp, 0);
+ if (sp != 0)
+ REGS_SP(p->thread.regs.regs.gp) = sp;
+
+ handler = fork_handler;
+
+ arch_copy_thread(&current->thread.arch, &p->thread.arch);
+ }
+ else {
+ get_safe_registers(p->thread.regs.regs.gp, p->thread.regs.regs.fp);
+ p->thread.request.u.thread = current->thread.request.u.thread;
+ handler = new_thread_handler;
+ }
+
+ new_thread(task_stack_page(p), &p->thread.switch_buf, handler);
+
+ if (current->thread.forking) {
+ clear_flushed_tls(p);
+
+ /*
+ * Set a new TLS for the child thread?
+ */
+ if (clone_flags & CLONE_SETTLS)
+ ret = arch_copy_tls(p);
+ }
+
+ return ret;
+}
+
+void initial_thread_cb(void (*proc)(void *), void *arg)
+{
+ int save_kmalloc_ok = kmalloc_ok;
+
+ kmalloc_ok = 0;
+ initial_thread_cb_skas(proc, arg);
+ kmalloc_ok = save_kmalloc_ok;
+}
+
+void default_idle(void)
+{
+ unsigned long long nsecs;
+
+ while (1) {
+ /* endless idle loop with no priority at all */
+
+ /*
+ * although we are an idle CPU, we do not want to
+ * get into the scheduler unnecessarily.
+ */
+ if (need_resched())
+ schedule();
+
+ tick_nohz_idle_enter();
+ rcu_idle_enter();
+ nsecs = disable_timer();
+ idle_sleep(nsecs);
+ rcu_idle_exit();
+ tick_nohz_idle_exit();
+ }
+}
+
+void cpu_idle(void)
+{
+ cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
+ default_idle();
+}
+
+int __cant_sleep(void) {
+ return in_atomic() || irqs_disabled() || in_interrupt();
+ /* Is in_interrupt() really needed? */
+}
+
+int user_context(unsigned long sp)
+{
+ unsigned long stack;
+
+ stack = sp & (PAGE_MASK << CONFIG_KERNEL_STACK_ORDER);
+ return stack != (unsigned long) current_thread_info();
+}
+
+extern exitcall_t __uml_exitcall_begin, __uml_exitcall_end;
+
+void do_uml_exitcalls(void)
+{
+ exitcall_t *call;
+
+ call = &__uml_exitcall_end;
+ while (--call >= &__uml_exitcall_begin)
+ (*call)();
+}
+
+char *uml_strdup(const char *string)
+{
+ return kstrdup(string, GFP_KERNEL);
+}
+EXPORT_SYMBOL(uml_strdup);
+
+int copy_to_user_proc(void __user *to, void *from, int size)
+{
+ return copy_to_user(to, from, size);
+}
+
+int copy_from_user_proc(void *to, void __user *from, int size)
+{
+ return copy_from_user(to, from, size);
+}
+
+int clear_user_proc(void __user *buf, int size)
+{
+ return clear_user(buf, size);
+}
+
+int strlen_user_proc(char __user *str)
+{
+ return strlen_user(str);
+}
+
+int smp_sigio_handler(void)
+{
+#ifdef CONFIG_SMP
+ int cpu = current_thread_info()->cpu;
+ IPI_handler(cpu);
+ if (cpu != 0)
+ return 1;
+#endif
+ return 0;
+}
+
+int cpu(void)
+{
+ return current_thread_info()->cpu;
+}
+
+static atomic_t using_sysemu = ATOMIC_INIT(0);
+int sysemu_supported;
+
+void set_using_sysemu(int value)
+{
+ if (value > sysemu_supported)
+ return;
+ atomic_set(&using_sysemu, value);
+}
+
+int get_using_sysemu(void)
+{
+ return atomic_read(&using_sysemu);
+}
+
+static int sysemu_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", get_using_sysemu());
+ return 0;
+}
+
+static int sysemu_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, sysemu_proc_show, NULL);
+}
+
+static ssize_t sysemu_proc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ char tmp[2];
+
+ if (copy_from_user(tmp, buf, 1))
+ return -EFAULT;
+
+ if (tmp[0] >= '0' && tmp[0] <= '2')
+ set_using_sysemu(tmp[0] - '0');
+ /* We use the first char, but pretend to write everything */
+ return count;
+}
+
+static const struct file_operations sysemu_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = sysemu_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = sysemu_proc_write,
+};
+
+int __init make_proc_sysemu(void)
+{
+ struct proc_dir_entry *ent;
+ if (!sysemu_supported)
+ return 0;
+
+ ent = proc_create("sysemu", 0600, NULL, &sysemu_proc_fops);
+
+ if (ent == NULL)
+ {
+ printk(KERN_WARNING "Failed to register /proc/sysemu\n");
+ return 0;
+ }
+
+ return 0;
+}
+
+late_initcall(make_proc_sysemu);
+
+int singlestepping(void * t)
+{
+ struct task_struct *task = t ? t : current;
+
+ if (!(task->ptrace & PT_DTRACE))
+ return 0;
+
+ if (task->thread.singlestep_syscall)
+ return 1;
+
+ return 2;
+}
+
+/*
+ * Only x86 and x86_64 have an arch_align_stack().
+ * All other arches have "#define arch_align_stack(x) (x)"
+ * in their asm/system.h
+ * As this is included in UML from asm-um/system-generic.h,
+ * we can use it to behave as the subarch does.
+ */
+#ifndef arch_align_stack
+unsigned long arch_align_stack(unsigned long sp)
+{
+ if (!(current->personality & ADDR_NO_RANDOMIZE) && randomize_va_space)
+ sp -= get_random_int() % 8192;
+ return sp & ~0xf;
+}
+#endif
+
+unsigned long get_wchan(struct task_struct *p)
+{
+ unsigned long stack_page, sp, ip;
+ bool seen_sched = 0;
+
+ if ((p == NULL) || (p == current) || (p->state == TASK_RUNNING))
+ return 0;
+
+ stack_page = (unsigned long) task_stack_page(p);
+ /* Bail if the process has no kernel stack for some reason */
+ if (stack_page == 0)
+ return 0;
+
+ sp = p->thread.switch_buf->JB_SP;
+ /*
+ * Bail if the stack pointer is below the bottom of the kernel
+ * stack for some reason
+ */
+ if (sp < stack_page)
+ return 0;
+
+ while (sp < stack_page + THREAD_SIZE) {
+ ip = *((unsigned long *) sp);
+ if (in_sched_functions(ip))
+ /* Ignore everything until we're above the scheduler */
+ seen_sched = 1;
+ else if (kernel_text_address(ip) && seen_sched)
+ return ip;
+
+ sp += sizeof(unsigned long);
+ }
+
+ return 0;
+}
+
+int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu)
+{
+ int cpu = current_thread_info()->cpu;
+
+ return save_fp_registers(userspace_pid[cpu], (unsigned long *) fpu);
+}
+
diff --git a/arch/um/kernel/ptrace.c b/arch/um/kernel/ptrace.c
new file mode 100644
index 00000000000..06b19039050
--- /dev/null
+++ b/arch/um/kernel/ptrace.c
@@ -0,0 +1,209 @@
+/*
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
+ * Licensed under the GPL
+ */
+
+#include "linux/audit.h"
+#include "linux/ptrace.h"
+#include "linux/sched.h"
+#include "asm/uaccess.h"
+#include "skas_ptrace.h"
+
+
+
+void user_enable_single_step(struct task_struct *child)
+{
+ child->ptrace |= PT_DTRACE;
+ child->thread.singlestep_syscall = 0;
+
+#ifdef SUBARCH_SET_SINGLESTEPPING
+ SUBARCH_SET_SINGLESTEPPING(child, 1);
+#endif
+}
+
+void user_disable_single_step(struct task_struct *child)
+{
+ child->ptrace &= ~PT_DTRACE;
+ child->thread.singlestep_syscall = 0;
+
+#ifdef SUBARCH_SET_SINGLESTEPPING
+ SUBARCH_SET_SINGLESTEPPING(child, 0);
+#endif
+}
+
+/*
+ * Called by kernel/ptrace.c when detaching..
+ */
+void ptrace_disable(struct task_struct *child)
+{
+ user_disable_single_step(child);
+}
+
+extern int peek_user(struct task_struct * child, long addr, long data);
+extern int poke_user(struct task_struct * child, long addr, long data);
+
+long arch_ptrace(struct task_struct *child, long request,
+ unsigned long addr, unsigned long data)
+{
+ int i, ret;
+ unsigned long __user *p = (void __user *)data;
+ void __user *vp = p;
+
+ switch (request) {
+ /* read the word at location addr in the USER area. */
+ case PTRACE_PEEKUSR:
+ ret = peek_user(child, addr, data);
+ break;
+
+ /* write the word at location addr in the USER area */
+ case PTRACE_POKEUSR:
+ ret = poke_user(child, addr, data);
+ break;
+
+ case PTRACE_SYSEMU:
+ case PTRACE_SYSEMU_SINGLESTEP:
+ ret = -EIO;
+ break;
+
+#ifdef PTRACE_GETREGS
+ case PTRACE_GETREGS: { /* Get all gp regs from the child. */
+ if (!access_ok(VERIFY_WRITE, p, MAX_REG_OFFSET)) {
+ ret = -EIO;
+ break;
+ }
+ for ( i = 0; i < MAX_REG_OFFSET; i += sizeof(long) ) {
+ __put_user(getreg(child, i), p);
+ p++;
+ }
+ ret = 0;
+ break;
+ }
+#endif
+#ifdef PTRACE_SETREGS
+ case PTRACE_SETREGS: { /* Set all gp regs in the child. */
+ unsigned long tmp = 0;
+ if (!access_ok(VERIFY_READ, p, MAX_REG_OFFSET)) {
+ ret = -EIO;
+ break;
+ }
+ for ( i = 0; i < MAX_REG_OFFSET; i += sizeof(long) ) {
+ __get_user(tmp, p);
+ putreg(child, i, tmp);
+ p++;
+ }
+ ret = 0;
+ break;
+ }
+#endif
+ case PTRACE_GET_THREAD_AREA:
+ ret = ptrace_get_thread_area(child, addr, vp);
+ break;
+
+ case PTRACE_SET_THREAD_AREA:
+ ret = ptrace_set_thread_area(child, addr, vp);
+ break;
+
+ case PTRACE_FAULTINFO: {
+ /*
+ * Take the info from thread->arch->faultinfo,
+ * but transfer max. sizeof(struct ptrace_faultinfo).
+ * On i386, ptrace_faultinfo is smaller!
+ */
+ ret = copy_to_user(p, &child->thread.arch.faultinfo,
+ sizeof(struct ptrace_faultinfo)) ?
+ -EIO : 0;