| Commit message (Collapse) | Author | Age | Files | Lines |
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number only creates needles extra hash entries.
Signed-off-by: Steve Dickson <steved@redhat.com>
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There were some problems with exportfs and rpc.mountd for long export
lists - see https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=76643
I do optimalization as my bachelors thesis (Facuulty of informatics,
Masaryk's university Brno, Czech Republic), under lead of Yenya
Kasprzak.
Both exportfs and rpc.mount build linked list of exports (shared
functions in export.c). Every time they are inserting new export into
list, they search for same export in list.
I replaced linked list by hash table and functions export_add and
export_lookup by functions hash_export_add and hash_export_lookup
(export.c).
Because some other functions required exportlist as linked list, hash
table has some implementation modification im comparison with ordinary
hash table. It also keeps exports in linked list and has pointer to
head of the list. So there's no need of implementation function
<for_all_in_hash_table>.
Signed-off-by: Tomas Richter <krik3t@gmail.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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support is missing in kernel.
Signed-off-by: Lukas Hejtmanek <xhejtman@ics.muni.cz>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Remove do_nfs_umount23() now that it is unused.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Replace existing mount option parser in nfsumount.c with the new pmap
stuffer
function nfs_options2pmap(). Mount option parsing for umount.nfs now
works
the same as it does for mount option rewriting in the text-based
mount.nfs
command.
This adds a number of new features:
1. The new logic supports resolving AF_INET6 server addresses
2. Support is added for the recently introduced "mountaddr" option.
3. Parsing numeric option values is much more careful
4. Option parsing no longer uses xmalloc/xstrdup, so it won't fail
silently if memory can't be allocated
5. Mount program number set in /etc/rpc is respected
6. Mount doesn't exit with EX_USAGE if the hostname lookup fails
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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We need an AF_INET6-capable version of nfs_call_unmount() to allow the
umount.nfs command to support unmounting NFS servers over IPv6. The
legacy
mount.nfs command still likes to use nfs_call_umount(), so we leave it
in
place and introduce a new API that can take a "struct sockaddr *".
The umount.nfs command will invoke this new API, but we'll leave the
legacy
mount.nfs command and the umount.nfs4 command alone. The umount.nfs4
command does not need this support because NFSv4 unmount operations are
entirely local.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Tell git to ignore cscope database files.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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nfs_extract_server_addresses() which causes the mount.nfs
command to segmentation fault when a NFS server only
supports UDP mounts.
Signed-off-by: Steve Dickson <steved@redhat.com>
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Recently commit 0dcb83a8 changed the po_rightmost() function to
distinguish among several possible mount options by taking a table
containing the alternatives, and returning the table index of the
entry which is rightmost in the mount option string.
If it didn't find any mount option that matches an entry from the
passed-in table, it returned zero. This was the same behavior it had
before, when it only checked for two options at a time. It returned
PO_NEITHER_FOUND, which was zero.
Since this is C, however, zero also happens to be a valid index into
the passed-in array of options.
Modify the po_rightmost() function to return -1 if the entry wasn't
found, and fix up the callers to look for a C-style array index that
starts at zero.
Thanks to Steve Dickson for troubleshooting the problem. His solution
was merely to bump the return value, as callers already expected an
ordinal index instead of a C-style index.
I prefer this equivalent but slightly more extensive change because it
makes the behavior of po_rightmost() more closely match how humans
understand C arrays to work. Let's address some of the confusion that
caused this bug, as well as fixing the run-time behavior.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Now that we have an AF_INET6-capable probe_bothports(), we can support
AF_INET6 when rewriting text-based NFS mount options. This should be
adequate to support NFS transport protocol and version negotiation with
AF_INET6 NFS servers.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Fix a bunch of corner cases in the text-based mount option rewriting logic.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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all nfs_options2pmap() in nfs_rewrite_mount_options() instead of
open-coding the logic to convert mount options to a pmap struct.
The new nfs_options2pmap() function is more careful about avoiding
invalid mount option values, and handles multiply-specified transport
protocol options correctly.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Both the text-based mount.nfs command and the umount.nfs command need
to fill in a pmap structure based on string mount options. Introduce
a shared function that can do this.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Sometimes we need to choose the rightmost option among multiple
different mount options. For example, we want to find the rightmost
of "proto," "tcp," and "udp". Or, the rightmost of "vers," "nfsvers,"
"v2," and "v3".
Update po_rightmost() to choose among N options instead of just two.
Signed-off-by: Steve Dickson <steved@redhat.com>
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Make sure nfs_sm_pgmtbl is not compiled if TI-RPC functions are not
available. This quiesces the following compiler warning:
showmount.c:53: warning: nfs_sm_pgmtbl defined but not used
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Allow easier testing of nfs-utils in legacy environments by providing
a "configure" option to force the build not to use libtirpc, even if
it's present on the build system. This can also be tried as a
fallback if problems are found with the new TI-RPC-based nfs-utils
code.
The new option is:
--enable-tirpc enable use of TI-RPC [default=no]
Build option matrix:
--disable-tirpc --disable-ipv6 Default; IPv4 only, glibc RPC
--disable-tirpc --enable-ipv6 'configure' will fail
--enable-tirpc --disable-ipv6 IPv4 only, TI-RPC
--enable-tirpc --enable-ipv6 IPv4 and IPv6, TI-RPC
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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nfs-utils no longer uses inet_ntop(3) so remove checks for it from
configure.ac.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Reported by Kevin Coffman and Jonathan Andrews. Apparently --without-uuid
doesn't work with some older versions of autoconf, so correct the help text
to document the option that actually does the trick.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Fix some documenting comments and an error message in configure.ac.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Older glibc versions have a getaddrinfo(3) that doesn't support
AI_ADDRCONFIG. Detect that case and build something else for
getport.c that will work adequately on those systems.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Glibc's getaddrinfo(3) implementation was added over time. Some old
versions support AI_ADDRCONFIG, but don't define it in header files.
Some older versions don't support AI_ADDRCONFIG at all.
Let's add specific checks to configure.ac to see that the local
getaddrinfo(3) implementation is complete. If it isn't, we will make
available a resolver that uses gethostbyname(3) and disable IPv6
entirely.
This patch should apply to 1.1.4 as well as the current nfs-utils repo.
The next patch has a fix for the getaddrinfo(3) call added since 1.1.4
in support/nfs/getport.c.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Revert the patch that added local definitions of AI_ADDRCONFIG and
friends to utils/mount/network.c. While old header versions don't
have those flags, even older versions of getaddrinfo(3) don't
support those flags at all.
The result is this error:
mount.nfs: DNS resolution failed for 10.10.10.10: Bad value for ai_flags
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Change the priority of "common" log messages so that syslog doesn't get
slammed/spammed when users' credentials expire, or there is another
common
problem which would cause error messages for all context creation
requests.
Note that this will now require that gssd or svcgssd option "-v" is used
to
debug these common cases.
Original patch from Andrew Pollock <apollock@google.com>.
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
CC: Andrew Pollock <apollock@google.com>
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be denied with misconfigured DNS configurations. Warnings
will be logged when these types of configurations are
detected.
Signed-off-by: Steve Dickson <steved@redhat.com>
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access rights, check the modification times on
both access files. If one of them have change,
update the hash entry instead of creating a
new entry.
Signed-off-by: Steve Dickson <steved@redhat.com>
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every RPC request, to both mountd and statd
when TCP wrappers are enabled. To help this
process scale better the access rights are stored
in a hash table, which are hashed per IP address,
RPC program and procudure numbers.
Signed-off-by: Steve Dickson <steved@redhat.com>
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access is allow due to misinterpreting the return value of
hosts_ctl(). This patch reworks that logic which closes
that hole.
Signed-off-by: Steve Dickson <steved@redhat.com>
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Statd is not unlinking host files during SM_UNMON and
SM_UNMON_ALL calls because the given host is still on the run-time
notify list (rtnl) and the check flag is set when xunlink() is
called. But the next thing the caller of xunlink() does is
remove the host from the rtnl list which means the
unlink will never happen.
So this patch removes the check flag from xunlink() since
its not needed and correctly allocates and frees memory
used by xunlink().
Signed-off-by: Steve Dickson <steved@redhat.com>
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The recv_reply() function was referencing host->ai in a freeaddrinfo(3)
call after it had freed @host.
This is not likely to be harmful in a single-threaded user context,
but it's still bad form, and it will get called out if testing
sm-notify with poisoned free memory. The less noise, the better we
are able to see real problems.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Replace the logic in nfs_parse_retry_option() with a call to the new
po_get_numeric() function.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Introduce a function that is especially for parsing keyword mount options
that take a numeric value.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Instead of sending down an infinite expiration value for the rsi(init) and
rsc(context) cache entries, use a reasonable value for the rsi cache, and
the actual context expiration value for the rsc cache.
Prompted by a proposal from Neil Brown as a result of a complaint of a
server running out of kernel memory when under heavy load of rpcsec_gss
traffic. Neil's original patch used one minute for the init cache and one
hour for the context cache. Using the actual expiration time prevents
unnecessary context re-negotiation.
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Add some plumbing so that the context expiration can be returned while
serializing the information. Later patch(es) will actually get the
expiration and pass it down to the kernel.
Signed-off-by: Kevin Coffman <kwc@citi.umich.edu>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Introduce an AF_INET6 capable probe_bothports() API. This means replacing
"struct sockaddr_in *" arguments with a "struct sockaddr *" and a socklen_t
arguments.
These functions often combine a "struct sockaddr_in" and a "struct pmap" into
a single "clnt_addr_t" argument. Instead of modifying "clnt_addr_t" and all
the legacy code that uses it, I'm going to create a new probe_bothports() API
for the text-based mount command that takes a "struct sockaddr *" and
sockaddr length, and leave the existing probe_bothports() interface, which
takes "clnt_addr_t" arguments, for legacy use.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Flesh out support for AF_INET6 in the intermediate helper functions
probe_nfsport() and probe_mntport().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Now that probe_port() uses an AF_INET6-capable rpcbind query and RPC ping,
finish updating probe_port() to support AF_INET6 addresses fully.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Added curly brackets around the record_pid() check which
stop sm-notify from exiting when a pid file does not
exist.
Signed-off-by: Steve Dickson <steved@redhat.com>
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Eliminate local getport() implementation from utils/mount/network.c, as
it is no longer used.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Update the mount command's probe_port() function to call the new shared
rpcbind query and RPC ping functions. This provides immediate support
for
rpcbind v3/v4 queries, and paves the way for supporting AF_INET6 in the
probe_bothports() path.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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So we can ensure that error output is directed appropriately, use
nfs_error() instead of perror() in start_statd().
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Repace the getport() and clnt_ping() calls in probe_statd() with their
new shared equivalents.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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user mounts an NFS filesystem.
The first time an NFS filesystem is mounted, we start statd from
/sbin/mount.nfs. If this first time is a non-root user doing the
mount, (thanks to e.g. the 'users' option in /etc/fstab)
then we need to be sure that the 'setuid' status from mount.nfs
is inherited through to rpc.statd so that it runs as root.
There are two places where we loose our setuid status due to the shell
(/bin/sh) discarding.
1/ mount.nfs uses "system" to run /usr/sbin/start-statd. This runs a
shell which is likely to drop privileges. So change that code to use
'fork' and 'execl' explicitly.
2/ start-statd is a shell script. To convince the shell to allow the
program to run in privileged mode, we need to add a "-p" flag.
We could just call setuid(getuid()) at some appropriate time, and it
might be worth doing that as well, however I think that getting
rid of 'system()' is a good idea and once that is done, the
adding of '-p' is trivial and sufficient.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Steve Dickson <steved@redhat.com>
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I have a situation where rpc.gssd appears to not be working.
Mount attempts which need to communicate with it block.
I've narrowed down the problem to that fact that all realtime signals
have been blocked. This means that DNOTIFY_SIGNAL (which is a
realtime signal) is never delivered, so gssd never rescans the
rpc_pipe/nfs directory.
It seems start_kde (or whatever it is called) and all descendants have
these
signals blocked. xfce seems to do the same thing. gnome doesn't.
So if you start rpc.gssd from a terminal window while logged in via
KDE, it doesn't behave as expected.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Introduce a version of nfs_get_mount_client() that supports AF_INET6 and
AF_INET server addresses. If the TI-RPC library is not available when
the showmount command is built, fall back to the legacy RPC user-space
API.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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In preparation to support IPv6 in the showmount command, extract the
logic that parses/acquires the target hostname and converts it into an RPC
client handle to contact the remote mountd service, and move it into its
own function.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Clean up: remove showmount.c's local getport() implementation, now that
the showmount command uses the shared one.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Have the showmount command invoke the shared nfs_getport() function
instead of its own local version. This gives the showmount command
immediate support for querying via rpcbindv3/v4 in addition to
portmapper, and sets the stage for AF_INET6 support in showmount.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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Signed-off-by: Steve Dickson <steved@redhat.com>
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It turns out that at least the mount command and the showmount command
need to query a server's rpcbind daemon. They need to query over
AF_INET6 as well as AF_INET.
libtirpc provides an rpcbind query capability with the rpcb_getaddr(3)
interface, but it takes a hostname and netconfig entry rather than a
sockaddr and a protocol type, and always uses a lengthy timeout. The
former is important to the mount command because it sometimes must
operate using a specific port and IP address rather than depending on
rpcbind and DNS to convert a [hostname, RPC program, netconfig] tuple
to a [socket address, port number, transport protocol] tuple.
The rpcb_getaddr(3) API also always uses a privileged port (at least
for setuid root executables like mount.nfs), which is not required for
an rpcbind query. This can exhaust the local system's reserved port
space quickly.
This patch provides a reserved-port-friendly AF_INET6-capable rpcbind
query C API that can be shared among commands and tools in nfs-utils,
and allows a query to a specified socket address and port rather than
a hostname.
In addition to an rpcbind query interface, this patch also provides a
facility to ping the remote RPC service to ensure that it is operating
as advertised by rpcbind. It's useful to combine an RPC ping with an
rpcbind query because in many cases, components of nfs-utils already
ping an RPC service immediately after receiving a successful GETPORT
result.
There are also a handful of utility routines provided, such as a
functions that can map between [sockaddr, port] and a universal
address.
I've made an attempt to make these new functions build and operate on
systems that do not have libtirpc.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Steve Dickson <steved@redhat.com>
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