]> err.no Git - linux-2.6/commit
[INET]: Generalise tcp_tw_bucket, aka TIME_WAIT sockets
authorArnaldo Carvalho de Melo <acme@ghostprotocols.net>
Wed, 10 Aug 2005 03:09:30 +0000 (20:09 -0700)
committerDavid S. Miller <davem@sunset.davemloft.net>
Mon, 29 Aug 2005 22:42:13 +0000 (15:42 -0700)
commit8feaf0c0a5488b3d898a9c207eb6678f44ba3f26
treeddd004afe2f7c8295f6fdb94d34f78a42b5961cb
parent33b62231908c58ae04185e4f1063d1e35a7c8576
[INET]: Generalise tcp_tw_bucket, aka TIME_WAIT sockets

This paves the way to generalise the rest of the sock ID lookup
routines and saves some bytes in TCPv4 TIME_WAIT sockets on distro
kernels (where IPv6 is always built as a module):

[root@qemu ~]# grep tw_sock /proc/slabinfo
tw_sock_TCPv6  0  0  128  31  1
tw_sock_TCP    0  0   96  41  1
[root@qemu ~]#

Now if a protocol wants to use the TIME_WAIT generic infrastructure it
only has to set the sk_prot->twsk_obj_size field with the size of its
inet_timewait_sock derived sock and proto_register will create
sk_prot->twsk_slab, for now its only for INET sockets, but we can
introduce timewait_sock later if some non INET transport protocolo
wants to use this stuff.

Next changesets will take advantage of this new infrastructure to
generalise even more TCP code.

[acme@toy net-2.6.14]$ grep built-in /tmp/before.size /tmp/after.size
/tmp/before.size: 188646   11764    5068  205478   322a6 net/ipv4/built-in.o
/tmp/after.size:  188144   11764    5068  204976   320b0 net/ipv4/built-in.o
[acme@toy net-2.6.14]$

Tested with both IPv4 & IPv6 (::1 (localhost) & ::ffff:172.20.0.1
(qemu host)).

Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
13 files changed:
include/linux/ipv6.h
include/linux/tcp.h
include/net/inet_hashtables.h
include/net/inet_timewait_sock.h [new file with mode: 0644]
include/net/sock.h
include/net/tcp.h
net/core/sock.c
net/ipv4/tcp.c
net/ipv4/tcp_diag.c
net/ipv4/tcp_ipv4.c
net/ipv4/tcp_minisocks.c
net/ipv6/addrconf.c
net/ipv6/tcp_ipv6.c