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linux/net/ipv4
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Tom Herbert ba418fa357 soreuseport: UDP/IPv4 implementation 
Allow multiple UDP sockets to bind to the same port.

Motivation soreuseport would be something like a DNS server.  An
alternative would be to recv on the same socket from multiple threads.
As in the case of TCP, the load across these threads tends to be
disproportionate and we also see a lot of contection on the socketlock.
Note that SO_REUSEADDR already allows multiple UDP sockets to bind to
the same port, however there is no provision to prevent hijacking and
nothing to distribute packets across all the sockets sharing the same
bound port.  This patch does not change the semantics of SO_REUSEADDR,
but provides usable functionality of it for unicast.

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-01-23 13:44:01 -05:00
..
netfilter netfilter: Use IS_ERR_OR_NULL(). 2013-01-22 14:28:29 -05:00
af_inet.c ipv4: Use IS_ERR_OR_NULL(). 2013-01-22 14:28:28 -05:00
ah4.c ipv4: Add redirect support to all protocol icmp error handlers. 2012-07-11 21:27:49 -07:00
arp.c arp: fix a regression in arp_solicit() 2012-12-24 18:42:58 -08:00
cipso_ipv4.c cipso: don't follow a NULL pointer when setsockopt() is called 2012-07-18 09:01:12 -07:00
datagram.c ipv4: Lock socket and use cork flow in ip4_datagram_connect(). 2011-05-08 13:48:57 -07:00
devinet.c ipv4: fix NULL checking in devinet_ioctl() 2013-01-06 21:11:18 -08:00
esp4.c ipv4: Add redirect support to all protocol icmp error handlers. 2012-07-11 21:27:49 -07:00
fib_frontend.c ipv4: fib: fix a comment. 2013-01-11 15:58:08 -08:00
fib_lookup.h
fib_rules.c sections: fix section conflicts in net 2012-10-06 03:04:45 +09:00
fib_semantics.c ipv4: 16 slots in initial fib_info hash table 2012-10-22 14:29:06 -04:00
fib_trie.c ipv4/route: arg delay is useless in rt_cache_flush() 2012-09-18 15:44:34 -04:00
gre.c net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
icmp.c ipv4: avoid passing NULL to inet_putpeer() in icmpv4_xrlim_allow() 2012-11-26 17:24:41 -05:00
igmp.c igmp: export symbol ip_mc_leave_group 2012-10-01 18:39:44 -04:00
inet_connection_sock.c soreuseport: TCP/IPv4 implementation 2013-01-23 13:44:01 -05:00
inet_diag.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-12-12 18:07:07 -08:00
inet_fragment.c ipv6: unify fragment thresh handling code 2012-09-19 17:23:28 -04:00
inet_hashtables.c soreuseport: TCP/IPv4 implementation 2013-01-23 13:44:01 -05:00
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 Merge branch 'for-3.7' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq 2012-10-02 09:54:49 -07:00
ip_forward.c ipv4: introduce rt_uses_gateway 2012-10-08 17:42:36 -04:00
ip_fragment.c net: increase fragment memory usage limits 2013-01-17 14:29:53 -05:00
ip_gre.c ipv4/ip_gre: set transport header correctly to gre header 2012-12-26 15:19:56 -08:00
ip_input.c net: TCP early demux cleanup 2012-07-30 14:53:21 -07:00
ip_options.c net: Allow userns root to control ipv4 2012-11-18 20:32:45 -05:00
ip_output.c net: Handle encapsulated offloads before fragmentation or handing to lower dev 2012-12-09 00:20:28 -05:00
ip_sockglue.c net: prevent setting ttl=0 via IP_TTL 2013-01-08 17:57:10 -08:00
ip_vti.c net: Allow userns root to control ipv4 2012-11-18 20:32:45 -05:00
ipcomp.c ipv4: Add redirect support to all protocol icmp error handlers. 2012-07-11 21:27:49 -07:00
ipconfig.c net/ipv4/ipconfig: really display the BOOTP/DHCP server's address. 2013-01-04 15:14:14 -08:00
ipip.c net: Allow userns root to control ipv4 2012-11-18 20:32:45 -05:00
ipmr.c ipmr: fix sparse warning when testing origin or group 2013-01-22 14:24:29 -05:00
Kconfig net/ipv4: VTI support new module for ip_vti. 2012-07-18 09:36:12 -07:00
Makefile memcg: rename config variables 2012-07-31 18:42:43 -07:00
netfilter.c netfilter: properly annotate ipv4_netfilter_{init,fini}() 2012-09-03 13:56:04 +02:00
ping.c userns: Use kgids for sysctl_ping_group_range 2012-08-14 21:49:10 -07:00
proc.c tcp: TCP Fast Open Server - header & support functions 2012-08-31 20:02:18 -04:00
protocol.c net: Add net protocol offload registration infrustructure 2012-11-15 17:36:17 -05:00
raw.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2012-10-02 11:11:09 -07:00
route.c ipv4/route/rtnl: get mcast attributes when dst is multicast 2012-12-07 12:24:33 -05:00
syncookies.c tcp: make sysctl_tcp_ecn namespace aware 2013-01-06 21:09:56 -08:00
sysctl_net_ipv4.c tcp: make sysctl_tcp_ecn namespace aware 2013-01-06 21:09:56 -08:00
tcp_bic.c tcp: fix undo after RTO for BIC 2012-01-20 14:17:26 -05:00
tcp_cong.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2012-12-13 12:00:02 -08:00
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_fastopen.c tcp: TCP Fast Open Server - header & support functions 2012-08-31 20:02:18 -04:00
tcp_highspeed.c
tcp_htcp.c
tcp_hybla.c tcp: bool conversions 2012-05-17 14:59:59 -04:00
tcp_illinois.c net: fix divide by zero in tcp algorithm illinois 2012-11-01 11:55:59 -04:00
tcp_input.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-01-15 15:05:59 -05:00
tcp_ipv4.c soreuseport: TCP/IPv4 implementation 2013-01-23 13:44:01 -05:00
tcp_lp.c
tcp_memcontrol.c memcg: decrement static keys at real destroy time 2012-05-29 16:22:28 -07:00
tcp_metrics.c tcp: handle tcp_net_metrics_init() order-5 memory allocation failures 2012-11-16 13:36:27 -05:00
tcp_minisocks.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-11-10 18:32:51 -05:00
tcp_output.c tcp: make sysctl_tcp_ecn namespace aware 2013-01-06 21:09:56 -08:00
tcp_probe.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
tcp_scalable.c
tcp_timer.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-11-10 18:32:51 -05:00
tcp_vegas.c
tcp_vegas.h
tcp_veno.c
tcp_westwood.c
tcp_yeah.c
tcp.c ipv4: Use IS_ERR_OR_NULL(). 2013-01-22 14:28:28 -05:00
tunnel4.c net: Convert printks to pr_<level> 2012-03-11 23:42:51 -07:00
udp_diag.c netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
udp_impl.h ipv4: fix checkpatch errors 2012-04-15 12:37:19 -04:00
udp.c soreuseport: UDP/IPv4 implementation 2013-01-23 13:44:01 -05:00
udplite.c net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
xfrm4_input.c ipv4: Fix input route performance regression. 2012-07-26 15:50:39 -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 net/ipv4: VTI support rx-path hook in xfrm4_mode_tunnel. 2012-07-18 09:36:12 -07:00
xfrm4_output.c xfrm4: Don't call icmp_send on local error 2011-07-01 17:33:19 -07:00
xfrm4_policy.c xfrm: Fix the gc threshold value for ipv4 2012-11-13 09:15:07 +01:00
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