linux-stable.git/include/net/tcp.h, branch v3.3.7

tcp: fix comment for tp->highest_sack

2012-02-28T20:06:33+00:00

There was an off-by-one error in the comments describing the
highest_sack field in struct tcp_sock. The comments previously claimed
that it was the "start sequence of the highest skb with SACKed
bit". This commit fixes the comments to note that it is the "start
sequence of the skb just *after* the highest skb with SACKed bit".

Signed-off-by: Neal Cardwell 
Acked-by: Ilpo Järvinen 
Signed-off-by: David S. Miller

net: Disambiguate kernel message

2012-02-01T19:41:50+00:00

Some of our machines were reporting:

TCP: too many of orphaned sockets

even when the number of orphaned sockets was well below the
limit.

We print a different message depending on whether we're out
of TCP memory or there are too many orphaned sockets.

Also move the check out of line and cleanup the messages
that were printed.

Signed-off-by: Arun Sharma 
Suggested-by: Mohan Srinivasan 
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: David Miller 
Cc: Glauber Costa 
Cc: Ingo Molnar 
Cc: Joe Perches 
Signed-off-by: David S. Miller

net/tcp: Fix tcp memory limits initialization when !CONFIG_SYSCTL

2012-01-30T17:41:06+00:00

sysctl_tcp_mem() initialization was moved to sysctl_tcp_ipv4.c
in commit 3dc43e3e4d0b52197d3205214fe8f162f9e0c334, since it
became a per-ns value.

That code, however, will never run when CONFIG_SYSCTL is
disabled, leading to bogus values on those fields - causing hung
TCP sockets.

This patch fixes it by keeping an initialization code in
tcp_init(). It will be overwritten by the first net namespace
init if CONFIG_SYSCTL is compiled in, and do the right thing if
it is compiled out.

It is also named properly as tcp_init_mem(), to properly signal
its non-sysctl side effect on TCP limits.

Reported-by: Ingo Molnar 
Signed-off-by: Glauber Costa 
Cc: David S. Miller 
Link: http://lkml.kernel.org/r/4F22D05A.8030604@parallels.com
[ renamed the function, tidied up the changelog a bit ]
Signed-off-by: Ingo Molnar 
Signed-off-by: David S. Miller

tcp: Replace constants with #define macros

2011-12-21T06:03:23+00:00

to record the state of SACK/FACK and DSACK for better readability and maintenance.

Signed-off-by: Vijay Subramanian 
Signed-off-by: David S. Miller

per-netns ipv4 sysctl_tcp_mem

2011-12-13T00:04:11+00:00

This patch allows each namespace to independently set up
its levels for tcp memory pressure thresholds. This patch
alone does not buy much: we need to make this values
per group of process somehow. This is achieved in the
patches that follows in this patchset.

Signed-off-by: Glauber Costa 
Reviewed-by: KAMEZAWA Hiroyuki 
CC: David S. Miller 
CC: Eric W. Biederman 
Signed-off-by: David S. Miller

foundations of per-cgroup memory pressure controlling.

2011-12-13T00:04:10+00:00

This patch replaces all uses of struct sock fields' memory_pressure,
memory_allocated, sockets_allocated, and sysctl_mem to acessor
macros. Those macros can either receive a socket argument, or a mem_cgroup
argument, depending on the context they live in.

Since we're only doing a macro wrapping here, no performance impact at all is
expected in the case where we don't have cgroups disabled.

Signed-off-by: Glauber Costa 
Reviewed-by: Hiroyouki Kamezawa 
CC: David S. Miller 
CC: Eric W. Biederman 
CC: Eric Dumazet 
Signed-off-by: David S. Miller

net: use IS_ENABLED(CONFIG_IPV6)

2011-12-11T23:25:16+00:00

Instead of testing defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)

Signed-off-by: Eric Dumazet 
Signed-off-by: David S. Miller

tcp: do not scale TSO segment size with reordering degree

2011-11-29T05:29:41+00:00

Since 2005 (c1b4a7e69576d65efc31a8cea0714173c2841244)
tcp_tso_should_defer has been using tcp_max_burst() as a target limit
for deciding how large to make outgoing TSO packets when not using
sysctl_tcp_tso_win_divisor. But since 2008
(dd9e0dda66ba38a2ddd1405ac279894260dc5c36) tcp_max_burst() returns the
reordering degree. We should not have tcp_tso_should_defer attempt to
build larger segments just because there is more reordering. This
commit splits the notion of deferral size used in TSO from the notion
of burst size used in cwnd moderation, and returns the TSO deferral
limit to its original value.

Signed-off-by: Neal Cardwell 
Signed-off-by: David S. Miller

net: introduce and use netdev_features_t for device features sets

2011-11-16T22:43:10+00:00

v2:	add couple missing conversions in drivers
	split unexporting netdev_fix_features()
	implemented %pNF
	convert sock::sk_route_(no?)caps

Signed-off-by: Michał Mirosław 
Signed-off-by: David S. Miller

net: make the tcp and udp file_operations for the /proc stuff const

2011-11-01T21:56:14+00:00

the tcp and udp code creates a set of struct file_operations at runtime
while it can also be done at compile time, with the added benefit of then
having these file operations be const.

the trickiest part was to get the "THIS_MODULE" reference right; the naive
method of declaring a struct in the place of registration would not work
for this reason.

Signed-off-by: Arjan van de Ven 
Signed-off-by: David S. Miller