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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>
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Fix various warnings in kernel-doc:
Warning(linux-2614-rc4//include/linux/net.h:89): Enum value 'SOCK_DCCP' not described in enum 'sock_type'
usercopy.c: should use !E instead of !I for exported symbols:
Warning(linux-2614-rc4//arch/i386/lib/usercopy.c): no structured comments found
fs.h does not need to use !E since it has no exported symbols:
Warning(linux-2614-rc4//include/linux/fs.h:1182): No description found for parameter 'find_exported_dentry'
Warning(linux-2614-rc4//include/linux/fs.h): no structured comments found
irq/manage.c should use !E for its exported symbols:
Warning(linux-2614-rc4//kernel/irq/manage.c): no structured comments found
macmodes.c should use !E for its exported symbols:
Warning(linux-2614-rc4//drivers/video/macmodes.c): no structured comments found
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Of this type, mostly:
CHECK net/ipv6/netfilter.c
net/ipv6/netfilter.c:96:12: warning: symbol 'ipv6_netfilter_init' was not declared. Should it be static?
net/ipv6/netfilter.c:101:6: warning: symbol 'ipv6_netfilter_fini' was not declared. Should it be static?
Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Development to this point was done on a subversion repository at:
http://oops.ghostprotocols.net:81/cgi-bin/viewcvs.cgi/dccp-2.6/
This repository will be kept at this site for the foreseable future,
so that interested parties can see the history of this code,
attributions, etc.
If I ever decide to take this offline I'll provide the full history at
some other suitable place.
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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- 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>
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That struct member was deleted, but a comment
was not updated to reflect this.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Ross moved. Remove the bad email address so people will find the correct
one in ./CREDITS.
Signed-off-by: Jesper Juhl <juhl-lkml@dif.dk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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I have recompiled Linux kernel 2.6.11.5 documentation for me and our
university students again. The documentation could be extended for more
sources which are equipped by structured comments for recent 2.6 kernels. I
have tried to proceed with that task. I have done that more times from 2.6.0
time and it gets boring to do same changes again and again. Linux kernel
compiles after changes for i386 and ARM targets. I have added references to
some more files into kernel-api book, I have added some section names as well.
So please, check that changes do not break something and that categories are
not too much skewed.
I have changed kernel-doc to accept "fastcall" and "asmlinkage" words reserved
by kernel convention. Most of the other changes are modifications in the
comments to make kernel-doc happy, accept some parameters description and do
not bail out on errors. Changed <pid> to @pid in the description, moved some
#ifdef before comments to correct function to comments bindings, etc.
You can see result of the modified documentation build at
http://cmp.felk.cvut.cz/~pisa/linux/lkdb-2.6.11.tar.gz
Some more sources are ready to be included into kernel-doc generated
documentation. Sources has been added into kernel-api for now. Some more
section names added and probably some more chaos introduced as result of quick
cleanup work.
Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Martin Waitz <tali@admingilde.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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struct socket uses a 'bool' (unsigned char) to
'flag' the pass-credential option for sockets
(which can be easily replaced by a flag)
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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To cope with MIPS, that has SOCK_STREAM and SOCK_DGRAM values swapped
to deal with binary compat.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@redhat.com>
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Every arch defines them the same without exception
and with this we only need to update one spot when
adding new socket types.
Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Here is another alternative, using tansworthe generator. It uses percpu
state. The one small semantic change is the net_srandom() only affects
the current cpu's seed. The problem was that having it change all cpu's
seed would mean adding locking and the only user's today are a couple of
places that feed in mac address to try make sure address resolution to
collide.
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>
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Beginning of iovec cleanups - added two helpers (kernel_{send,recv}msg)
that do sock_sendmsg/sock_recvmsg with kvec instead of iovec; basically,
they were abstracted from earlier afs patch. They take kvec/length of
kvec as separate arguments, do set_fs(), stick kvec into msghdr and call
sock_...msg().
The next group of patches will switch network filesystems to use of kvec
for kernel data + use of these helpers. Basically, the same thing we'd
done for afs.
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Here's the tail of setsockopt I've missed - for old protocol families we
have wrappers around those methods.
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The purpose of this is to allow sockets created by the kernel in this way
to be passed through the LSM socket creation hooks and be labeled and
mediated in the same manner as other sockets.
This patches addresses a class of potential issues with LSMs, where such
sockets will not be labeled correctly (if at all), or mediated during
creation. Under SELinux, it fixes a specific bug where RPC sockets
created by the kernel during TCP NFS serving are unlabeled.
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Under SELinux, and potentially other LSMs, we need to be able to
distinguish between user sockets and kernel sockets. For SELinux
specifically, kernel sockets need to be specially labeled during creation,
then bypass access control checks (they are controlled by the kernel
itself and not subject to SELinux mediation).
This addresses a class of potential issues in SELinux where, for example,
a TCP NFS session times out, then the kernel re-establishes an RPC
connection upon further user activity. We do not want such kernel
created sockets to be labeled with user security contexts.
sock_create() and sock_create_kern() are wrapper functions, which seems
semantically clearer to me than e.g. adding a flag to sock_create(). If
you prefer the latter, then let me know.
The patch also adds an argument to the LSM socket creation functions
indicating whether the socket being created is a kernel socket or not.
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Previously, default aliases were hardwired into modutils. Now they
should be inside the modules, using MODULE_ALIAS() (they will be overridden
by any user alias).
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handling.
This pointed out a bug in x86 sys_rt_sigreturn(), btw.
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As per discussions in netdev we'll probably be moving to a brand new scheme, but this
set of changesets have been discussed and are an improvement to the current situation
and were already done prior to this thread happening.
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I had to move the rtnetlink_init and init_netlink calls to af_netlink init time, so that
the sk_alloc called down the rtnetlink_init callchain is done after the PF_NETLINK
net_proto_family is sock_registered, and because of that the af_netlink init function
call had to be moved to earlier by means of subsys_initcall (DaveM's suggestion).
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Next batch of changesets will fix the legacy protocols (IPX, LLC, etc).
Tested with LLC and IPX already.
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Use struct forward declaration and fix irda.h and netlink.h to include what
uses (only sa_family_t).
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struct net_proto is not anymore needed, as the protocols
have their init functions marked as __init, not needing
explicit calling.
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compat syscalls.
1) Pull scm argument from sendmsg/recvmsg, it is available
from I/O control block
2) Consolidate networking syscall compat call into net/compat.c
3) Change ops->{sendmsg,recvmsg}() code sequences into sock_{sendmsg,recvmsg}()
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more inode->u trimming - socket_i is killed.
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- Hui-Fen Hsu: sis900 driver update
- NIIBE Yutaka: Super-H update
- Alan Cox: more resyncs (ARM down, but more to go)
- David Miller: network zerocopy, Sparc sync, qlogic,FC fix, etc.
- David Miller/me: get rid of various drivers hacks to do mmap
alignment behind the back of the VM layer. Create a real
protocol for it.
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