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* [SOCK]: Introduce sk_receive_skbArnaldo Carvalho de Melo2006-01-031-16/+1
| | | | | | | | Its common enough to to justify that, TCP still can't use it as it has the prequeueing stuff, still to be made generic in the not so distant future :-) Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: move struct proto_ops to constEric Dumazet2006-01-031-2/+2
| | | | | | | | | | | | | | | | | | | | | | I noticed that some of 'struct proto_ops' used in the kernel may share a cache line used by locks or other heavily modified data. (default linker alignement is 32 bytes, and L1_CACHE_LINE is 64 or 128 at least) This patch makes sure a 'struct proto_ops' can be declared as const, so that all cpus can share all parts of it without false sharing. This is not mandatory : a driver can still use a read/write structure if it needs to (and eventually a __read_mostly) I made a global stubstitute to change all existing occurences to make them const. This should reduce the possibility of false sharing on SMP, and speedup some socket system calls. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: add memory buffer settings Steven Whitehouse2005-12-052-3/+55
| | | | | | | | The patch (originally from Steve) simply adds memory buffer settings to DECnet similar to those in TCP. Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: fix SIGPIPEPatrick Caulfield2005-11-111-7/+7
| | | | | | | | | | | Currently recvmsg generates SIGPIPE whereas sendmsg does not; for the other stacks it seems to be the other way round! It also fixes the bug where reading from a socket whose peer has shutdown returned -EINVAL rather than 0. Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: kfree cleanupJesper Juhl2005-11-081-8/+6
| | | | | | | | | | | | | | | From: Jesper Juhl <jesper.juhl@gmail.com> This is the net/ part of the big kfree cleanup patch. Remove pointless checks for NULL prior to calling kfree() in net/. Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br> Acked-by: Marcel Holtmann <marcel@holtmann.org> Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: Andrew Morton <akpm@osdl.org>
* [DECNET]: Remove some redundant ifdeffed codePatrick Caulfield2005-10-251-13/+0
| | | | | | | Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com> Signed-off-by: Steven Whitehouse <steve@chygwyn.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
* [PATCH] gfp flags annotations - part 1Al Viro2005-10-082-15/+11
| | | | | | | | | | | | - added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [DECNET]: fix sparse gfp nocast warningsRandy Dunlap2005-10-042-11/+18
| | | | | | | | | | Fix implicit nocast warnings in decnet code: net/decnet/af_decnet.c:458:40: warning: implicit cast to nocast type net/decnet/dn_nsp_out.c:125:35: warning: implicit cast to nocast type net/decnet/dn_nsp_out.c:219:29: warning: implicit cast to nocast type Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [PATCH] timer initialization cleanup: DEFINE_TIMERIngo Molnar2005-09-091-2/+1
| | | | | | | | | | Clean up timer initialization by introducing DEFINE_TIMER a'la DEFINE_SPINLOCK. Build and boot-tested on x86. A similar patch has been been in the -RT tree for some time. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [DECNET]: Tidy send side socket SKB allocation.Patrick Caulfield2005-09-012-70/+33
| | | | | | | | | | | Patch from Steve Whitehouse which I've vetted and tested: "This patch is really intended has a move towards fixing the sendmsg/recvmsg functions in various ways so that we will finally have working nagle. Also reduces code duplication." Signed-off-by: Patrick Caulfield <patrick@tykepenguin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: use __read_mostly on kmem_cache_t , DEFINE_SNMP_STAT pointersEric Dumazet2005-08-291-1/+1
| | | | | | | | | | | | | This patch puts mostly read only data in the right section (read_mostly), to help sharing of these data between CPUS without memory ping pongs. On one of my production machine, tcp_statistics was sitting in a heavily modified cache line, so *every* SNMP update had to force a reload. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: Fix build after netlink changes.Andrew Morton2005-08-291-2/+3
| | | | | Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: Add "groups" argument to netlink_kernel_createPatrick McHardy2005-08-291-2/+2
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: Convert netlink users to use group numbers instead of bitmasksPatrick McHardy2005-08-293-9/+9
| | | | | Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TCP]: Move the tcp sock states to net/tcp_states.hArnaldo Carvalho de Melo2005-08-292-2/+2
| | | | | | | | | | | Lots of places just needs the states, not even linux/tcp.h, where this enum was, needs it. This speeds up development of the refactorings as less sources are rebuilt when things get moved from net/tcp.h. Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: Add properly module refcounting for kernel netlink sockets.Harald Welte2005-08-291-1/+3
| | | | | | | | | | | - Remove bogus code for compiling netlink as module - Add module refcounting support for modules implementing a netlink protocol - Add support for autoloading modules that implement a netlink protocol as soon as someone opens a socket for that protocol Signed-off-by: Harald Welte <laforge@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Kill skb->real_devDavid S. Miller2005-08-292-2/+2
| | | | | | | | | | | Bonding just wants the device before the skb_bond() decapsulation occurs, so simply pass that original device into packet_type->func() as an argument. It remains to be seen whether we can use this same exact thing to get rid of skb->input_dev as well. Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Kill skb->listDavid S. Miller2005-08-292-2/+2
| | | | | | | | | | | | | | Remove the "list" member of struct sk_buff, as it is entirely redundant. All SKB list removal callers know which list the SKB is on, so storing this in sk_buff does nothing other than taking up some space. Two tricky bits were SCTP, which I took care of, and two ATM drivers which Francois Romieu <romieu@fr.zoreil.com> fixed up. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
* [DECNET]: Fix RCU race condition in dn_neigh_construct().Paul E. McKenney2005-08-171-1/+1
| | | | | | Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: Use sk_stream_error function rather than DECnet's ownSteven Whitehouse2005-08-101-10/+1
| | | | | Signed-off-by: Steven Whitehouse <steve@chygwyn.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: move config options out to individual protocolsSam Ravnborg2005-07-111-0/+23
| | | | | | | | | | | | | | | | | Move the protocol specific config options out to the specific protocols. With this change net/Kconfig now starts to become readable and serve as a good basis for further re-structuring. The menu structure is left almost intact, except that indention is fixed in most cases. Most visible are the INET changes where several "depends on INET" are replaced with a single ifdef INET / endif pair. Several new files were created to accomplish this change - they are small but serve the purpose that config options are now distributed out where they belongs. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NET]: Transform skb_queue_len() binary tests into skb_queue_empty()David S. Miller2005-07-082-6/+7
| | | | | | | | | | | | | This is part of the grand scheme to eliminate the qlen member of skb_queue_head, and subsequently remove the 'list' member of sk_buff. Most users of skb_queue_len() want to know if the queue is empty or not, and that's trivially done with skb_queue_empty() which doesn't use the skb_queue_head->qlen member and instead uses the queue list emptyness as the test. Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: Fix memset overflow on 64bit archs while dumping decnet routing rulesThomas Graf2005-07-051-1/+2
| | | | | Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: Remove unnecessary initilization of unused variable entriesThomas Graf2005-06-181-1/+0
| | | | | | | | This patch was supposed to be part of the neighbour tables related patchset but apparently got lost. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: Correctly set NLM_F_MULTI without checking the pidJamal Hadi Salim2005-06-184-16/+19
| | | | | | | | | | | This patch rectifies some rtnetlink message builders that derive the flags from the pid. It is now explicit like the other cases which get it right. Also fixes half a dozen dumpers which did not set NLM_F_MULTI at all. Signed-off-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DECNET]: Fix build after C99 netlink initializer change.Rafael J. Wysocki2005-05-051-1/+1
| | | | Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: Fix infinite loops in synchronous netlink changes.David S. Miller2005-05-031-1/+1
| | | | | | | The qlen should continue to decrement, even if we pop partially processed SKBs back onto the receive queue. Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETLINK]: Synchronous message processing.Herbert Xu2005-05-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let's recap the problem. The current asynchronous netlink kernel message processing is vulnerable to these attacks: 1) Hit and run: Attacker sends one or more messages and then exits before they're processed. This may confuse/disable the next netlink user that gets the netlink address of the attacker since it may receive the responses to the attacker's messages. Proposed solutions: a) Synchronous processing. b) Stream mode socket. c) Restrict/prohibit binding. 2) Starvation: Because various netlink rcv functions were written to not return until all messages have been processed on a socket, it is possible for these functions to execute for an arbitrarily long period of time. If this is successfully exploited it could also be used to hold rtnl forever. Proposed solutions: a) Synchronous processing. b) Stream mode socket. Firstly let's cross off solution c). It only solves the first problem and it has user-visible impacts. In particular, it'll break user space applications that expect to bind or communicate with specific netlink addresses (pid's). So we're left with a choice of synchronous processing versus SOCK_STREAM for netlink. For the moment I'm sticking with the synchronous approach as suggested by Alexey since it's simpler and I'd rather spend my time working on other things. However, it does have a number of deficiencies compared to the stream mode solution: 1) User-space to user-space netlink communication is still vulnerable. 2) Inefficient use of resources. This is especially true for rtnetlink since the lock is shared with other users such as networking drivers. The latter could hold the rtnl while communicating with hardware which causes the rtnetlink user to wait when it could be doing other things. 3) It is still possible to DoS all netlink users by flooding the kernel netlink receive queue. The attacker simply fills the receive socket with a single netlink message that fills up the entire queue. The attacker then continues to call sendmsg with the same message in a loop. Point 3) can be countered by retransmissions in user-space code, however it is pretty messy. In light of these problems (in particular, point 3), we should implement stream mode netlink at some point. In the mean time, here is a patch that implements synchronous processing. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
* [RTNETLINK] Cleanup rtnetlink_link tablesThomas Graf2005-05-031-12/+13
| | | | | | | | Converts remaining rtnetlink_link tables to use c99 designated initializers to make greping a little bit easier. Signed-off-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-1618-0/+10975
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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