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linux/net/ipv4
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David S. Miller 41063e9dd1 ipv4: Early TCP socket demux. 
Input packet processing for local sockets involves two major demuxes.
One for the route and one for the socket.

But we can optimize this down to one demux for certain kinds of local
sockets.

Currently we only do this for established TCP sockets, but it could
at least in theory be expanded to other kinds of connections.

If a TCP socket is established then it's identity is fully specified.

This means that whatever input route was used during the three-way
handshake must work equally well for the rest of the connection since
the keys will not change.

Once we move to established state, we cache the receive packet's input
route to use later.

Like the existing cached route in sk->sk_dst_cache used for output
packets, we have to check for route invalidations using dst->obsolete
and dst->ops->check().

Early demux occurs outside of a socket locked section, so when a route
invalidation occurs we defer the fixup of sk->sk_rx_dst until we are
actually inside of established state packet processing and thus have
the socket locked.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-06-19 21:22:05 -07:00
..
netfilter netfilter: add user-space connection tracking helper infrastructure 2012-06-16 15:40:02 +02:00
af_inet.c ipv4: Early TCP socket demux. 2012-06-19 21:22:05 -07:00
ah4.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
arp.c ipv4: Add interface option to enable routing of 127.0.0.0/8 2012-06-12 15:25:46 -07:00
cipso_ipv4.c ipv4: Convert call_rcu() to kfree_rcu(), drop opt_kfree_rcu() 2012-02-21 09:03:31 -08:00
datagram.c ipv4: Lock socket and use cork flow in ip4_datagram_connect(). 2011-05-08 13:48:57 -07:00
devinet.c ipv4: Add interface option to enable routing of 127.0.0.0/8 2012-06-12 15:25:46 -07:00
esp4.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
fib_frontend.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
fib_lookup.h ipv4: Fix nexthop caching wrt. scoping. 2011-03-24 18:06:47 -07:00
fib_rules.c ipv4: Stop using NLA_PUT*(). 2012-04-02 04:33:43 -04:00
fib_semantics.c ipv4: Cap ADVMSS metric in the FIB rather than the routing cache. 2012-06-17 19:47:34 -07:00
fib_trie.c inet: Add inetpeer tree roots to the FIB tables. 2012-06-11 02:09:16 -07:00
gre.c net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
icmp.c inet: Sanitize inet{,6} protocol demux. 2012-06-19 18:56:21 -07:00
igmp.c ipv4: fix checkpatch errors 2012-04-15 12:37:19 -04:00
inet_connection_sock.c tcp: do not create inetpeer on SYNACK message 2012-06-01 14:22:11 -04:00
inet_diag.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-07 23:35:40 -04:00
inet_fragment.c inetpeer: add parameter net for inet_getpeer_v4,v6 2012-06-08 14:27:23 -07:00
inet_hashtables.c ipv4: fix checkpatch errors 2012-04-15 12:37:19 -04:00
inet_lro.c net: add skb frag size accessors 2011-10-19 03:10:46 -04:00
inet_timewait_sock.c net: ipv4 and ipv6: Convert printk(KERN_DEBUG to pr_debug 2012-05-16 01:01:03 -04:00
inetpeer.c inet: Add family scope inetpeer flushes. 2012-06-11 02:09:10 -07:00
ip_forward.c snmp: fix OutOctets counter to include forwarded datagrams 2012-06-07 14:50:56 -07:00
ip_fragment.c inet: Pass inetpeer root into inet_getpeer*() interfaces. 2012-06-09 19:12:36 -07:00
ip_gre.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
ip_input.c ipv4: Early TCP socket demux. 2012-06-19 21:22:05 -07:00
ip_options.c net: Convert net_ratelimit uses to net_<level>_ratelimited 2012-05-15 13:45:03 -04:00
ip_output.c net-next: add dev_loopback_xmit() to avoid duplicate code 2012-06-12 18:51:09 -07:00
ip_sockglue.c net: IP_MULTICAST_IF setsockopt now recognizes struct mreq 2012-05-07 23:03:22 -04:00
ipcomp.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
ipconfig.c net/ipv4/ipconfig: neaten __setup placement 2012-05-20 04:06:16 -04:00
ipip.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
ipmr.c snmp: fix OutOctets counter to include forwarded datagrams 2012-06-07 14:50:56 -07:00
Kconfig net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
Makefile tcp memory pressure controls 2011-12-12 19:04:10 -05:00
netfilter.c net: Delete all remaining instances of ctl_path 2012-04-20 21:22:30 -04:00
ping.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
proc.c tcp: reduce out_of_order memory use 2012-03-19 16:53:08 -04:00
protocol.c inet: Sanitize inet{,6} protocol demux. 2012-06-19 18:56:21 -07:00
raw.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
route.c ipv4: Cap ADVMSS metric in the FIB rather than the routing cache. 2012-06-17 19:47:34 -07:00
syncookies.c tcp: fix syncookie regression 2012-03-11 15:52:12 -07:00
sysctl_net_ipv4.c tcp: early retransmit 2012-05-02 20:56:10 -04:00
tcp_bic.c tcp: fix undo after RTO for BIC 2012-01-20 14:17:26 -05:00
tcp_cong.c tcp: bool conversions 2012-05-17 14:59:59 -04:00
tcp_cubic.c tcp: fix undo after RTO for CUBIC 2012-01-20 14:17:26 -05:00
tcp_diag.c inet_diag: Rename inet_diag_req into inet_diag_req_v2 2012-01-11 12:56:06 -08:00
tcp_highspeed.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_htcp.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_hybla.c tcp: bool conversions 2012-05-17 14:59:59 -04:00
tcp_illinois.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_input.c ipv4: Early TCP socket demux. 2012-06-19 21:22:05 -07:00
tcp_ipv4.c ipv4: Early TCP socket demux. 2012-06-19 21:22:05 -07:00
tcp_lp.c Fix common misspellings 2011-03-31 11:26:23 -03:00
tcp_memcontrol.c memcg: decrement static keys at real destroy time 2012-05-29 16:22:28 -07:00
tcp_minisocks.c ipv4: Early TCP socket demux. 2012-06-19 21:22:05 -07:00
tcp_output.c tcp: tcp_make_synack() consumes dst parameter 2012-06-04 11:27:39 -04:00
tcp_probe.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
tcp_scalable.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_timer.c tcp: early retransmit: delayed fast retransmit 2012-05-02 20:56:10 -04:00
tcp_vegas.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_vegas.h
tcp_veno.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_westwood.c tcp: mark tcp_congestion_ops read_mostly 2011-03-10 00:40:17 -08:00
tcp_yeah.c Fix common misspellings 2011-03-31 11:26:23 -03:00
tcp.c mm: add a low limit to alloc_large_system_hash 2012-05-24 00:28:21 -04:00
tunnel4.c net: Convert printks to pr_<level> 2012-03-11 23:42:51 -07:00
udp_diag.c udp_diag: implement idiag_get_info for udp/udplite to get queue information 2012-04-25 20:43:01 -04:00
udp_impl.h ipv4: fix checkpatch errors 2012-04-15 12:37:19 -04:00
udp.c ipv4: Handle PMTU in all ICMP error handlers. 2012-06-14 22:22:07 -07:00
udplite.c net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
xfrm4_input.c net/ipv4: EXPORT_SYMBOL cleanups 2010-07-12 12:57:54 -07:00
xfrm4_mode_beet.c ipsec: be careful of non existing mac headers 2012-02-23 16:50:45 -05:00
xfrm4_mode_transport.c
xfrm4_mode_tunnel.c ipsec: be careful of non existing mac headers 2012-02-23 16:50:45 -05:00
xfrm4_output.c xfrm4: Don't call icmp_send on local error 2011-07-01 17:33:19 -07:00
xfrm4_policy.c inet: Hide route peer accesses behind helpers. 2012-06-11 02:08:47 -07:00
xfrm4_state.c net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modules 2011-10-31 19:30:30 -04:00
xfrm4_tunnel.c net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00