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android_kernel_motorola_sm6375/net/ipv6
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Repository files (latest commit first)
Filename Latest commit message Latest commit date
Eric Dumazet 719f835853 udp: add rehash on connect() 
commit 30fff923 introduced in linux-2.6.33 (udp: bind() optimisation)
added a secondary hash on UDP, hashed on (local addr, local port).

Problem is that following sequence :

fd = socket(...)
connect(fd, &remote, ...)

not only selects remote end point (address and port), but also sets
local address, while UDP stack stored in secondary hash table the socket
while its local address was INADDR_ANY (or ipv6 equivalent)

Sequence is :
 - autobind() : choose a random local port, insert socket in hash tables
              [while local address is INADDR_ANY]
 - connect() : set remote address and port, change local address to IP
              given by a route lookup.

When an incoming UDP frame comes, if more than 10 sockets are found in
primary hash table, we switch to secondary table, and fail to find
socket because its local address changed.

One solution to this problem is to rehash datagram socket if needed.

We add a new rehash(struct socket *) method in "struct proto", and
implement this method for UDP v4 & v6, using a common helper.

This rehashing only takes care of secondary hash table, since primary
hash (based on local port only) is not changed.

Reported-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-08 21:45:01 -07:00
..
netfilter netfilter: discard overlapping IPv6 fragment 2010-09-07 13:57:21 -07:00
addrconf.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-07-27 21:01:35 -07:00
addrconf_core.c ipv6: Remove IPV6_ADDR_RESERVED 2010-02-26 03:59:07 -08:00
addrlabel.c net: CONFIG_NET_NS reduction 2010-06-02 05:16:23 -07:00
af_inet6.c inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage() 2010-07-12 20:21:46 -07:00
ah6.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
anycast.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
datagram.c udp: add rehash on connect() 2010-09-08 21:45:01 -07:00
esp6.c xfrm: SA lookups signature with mark 2010-02-22 16:20:22 -08:00
exthdrs.c ipv6: avoid two atomics in ipv6_rthdr_rcv() 2010-06-14 23:13:06 -07:00
exthdrs_core.c
fib6_rules.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
icmp.c ipv6: fix ICMP6_MIB_OUTERRORS 2010-06-09 18:39:27 -07:00
inet6_connection_sock.c ipv6: Refactor update of IPv6 flowi destination address for srcrt (RH) option 2010-06-02 07:08:31 -07:00
inet6_hashtables.c
ip6_fib.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
ip6_flowlabel.c IPv6: Add dontfrag argument to relevant functions 2010-04-23 23:35:28 -07:00
ip6_input.c Merge branch 'master' of /repos/git/net-next-2.6 2010-04-20 16:02:01 +02:00
ip6_output.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
ip6_tunnel.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
ip6mr.c ipmr: dont corrupt lists 2010-06-07 02:57:14 -07:00
ipcomp6.c xfrm: SA lookups signature with mark 2010-02-22 16:20:22 -08:00
ipv6_sockglue.c ipv6: remove ipv6_statistics 2010-06-25 21:33:17 -07:00
Kconfig ipv6: ip6mr: support multiple tables 2010-05-11 14:40:55 +02:00
Makefile
mcast.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
mip6.c IPv6: fix CoA check in RH2 input handler (mip6_rthdr_input()) 2010-07-18 15:04:33 -07:00
ndisc.c Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2010-07-07 15:59:38 -07:00
netfilter.c netfilter: kill redundant check code in which setting ip_summed value 2010-06-14 16:20:02 +02:00
proc.c snmp: 64bit ipstats_mib for all arches 2010-06-30 13:31:19 -07:00
protocol.c
raw.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
reassembly.c ipv6: discard overlapping fragment 2010-09-07 13:57:21 -07:00
route.c ipv6: remove sysctl jiffies conversion on gc_elasticity and min_adv_mss 2010-08-14 22:42:51 -07:00
sit.c net-next: remove useless union keyword 2010-06-10 23:31:35 -07:00
syncookies.c syncookies: add support for ECN 2010-06-26 22:00:03 -07:00
sysctl_net_ipv6.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
tcp_ipv6.c inet, inet6: make tcp_sendmsg() and tcp_sendpage() through inet_sendmsg() and inet_sendpage() 2010-07-12 20:21:46 -07:00
tunnel6.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
udp.c udp: add rehash on connect() 2010-09-08 21:45:01 -07:00
udp_impl.h
udplite.c net: spread __net_init, __net_exit 2010-01-17 19:16:02 -08:00
xfrm6_input.c netfilter: ipv6: use NFPROTO values for NF_HOOK invocation 2010-03-25 16:00:49 +01:00
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
xfrm6_output.c netfilter: ipv6: use NFPROTO values for NF_HOOK invocation 2010-03-25 16:00:49 +01:00
xfrm6_policy.c xfrm: fix xfrm by MARK logic 2010-07-04 11:46:07 -07:00
xfrm6_state.c
xfrm6_tunnel.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00