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linux/net/ipv4
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Eric Dumazet 54764bb647 ipv4: Restore old dst_free() behavior. 
commit 404e0a8b6a55 (net: ipv4: fix RCU races on dst refcounts) tried
to solve a race but added a problem at device/fib dismantle time :

We really want to call dst_free() as soon as possible, even if sockets
still have dst in their cache.
dst_release() calls in free_fib_info_rcu() are not welcomed.

Root of the problem was that now we also cache output routes (in
nh_rth_output), we must use call_rcu() instead of call_rcu_bh() in
rt_free(), because output route lookups are done in process context.

Based on feedback and initial patch from David Miller (adding another
call_rcu_bh() call in fib, but it appears it was not the right fix)

I left the inet_sk_rx_dst_set() helper and added __rcu attributes
to nh_rth_output and nh_rth_input to better document what is going on in
this code.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-07-31 14:41:38 -07:00
..
netfilter
ipv4: Adjust semantics of rt->rt_gateway.
2012-07-20 13:31:20 -07:00
af_inet.c
net-tcp: Fast Open client - sendmsg(MSG_FASTOPEN)
2012-07-19 11:02:03 -07:00
ah4.c
ipv4: Add redirect support to all protocol icmp error handlers.
2012-07-11 21:27:49 -07:00
arp.c
ipv4: Fix input route performance regression.
2012-07-26 15:50:39 -07:00
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: Add interface option to enable routing of 127.0.0.0/8
2012-06-12 15:25:46 -07:00
esp4.c
ipv4: Add redirect support to all protocol icmp error handlers.
2012-07-11 21:27:49 -07:00
fib_frontend.c
ipv4: Remove redundant assignment
2012-07-23 13:00:54 -07:00
fib_lookup.h
ipv4: Fix nexthop caching wrt. scoping.
2011-03-24 18:06:47 -07:00
fib_rules.c
ipv4: Don't store a rule pointer in fib_result.
2012-07-13 08:21:29 -07:00
fib_semantics.c
ipv4: Restore old dst_free() behavior.
2012-07-31 14:41:38 -07:00
fib_trie.c
ipv4: clean up put_child
2012-07-29 23:18:30 -07:00
gre.c
net: ipv4: Standardize prefixes for message logging
2012-03-12 17:05:21 -07:00
icmp.c
ipv4: Prepare for change of rt->rt_iif encoding.
2012-07-23 16:36:26 -07:00
igmp.c
ipv4: fix checkpatch errors
2012-04-15 12:37:19 -04:00
inet_connection_sock.c
ipv4: Kill FLOWI_FLAG_RT_NOCACHE and associated code.
2012-07-20 13:36:54 -07:00
inet_diag.c
net: make sock diag per-namespace
2012-07-16 22:31:34 -07:00
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
ipv4: Maintain redirect and PMTU info in struct rtable again.
2012-07-10 22:40:14 -07:00
ip_forward.c
snmp: fix OutOctets counter to include forwarded datagrams
2012-06-07 14:50:56 -07:00
ip_fragment.c
ipv4: Fix input route performance regression.
2012-07-26 15:50:39 -07:00
ip_gre.c
ipv4: Adjust semantics of rt->rt_gateway.
2012-07-20 13:31:20 -07:00
ip_input.c
net: TCP early demux cleanup
2012-07-30 14:53:21 -07:00
ip_options.c
ipv4: optimize fib_compute_spec_dst call in ip_options_echo
2012-07-19 08:30:49 -07:00
ip_output.c
Merge branch 'kill_rtcache'
2012-07-22 17:04:15 -07:00
ip_sockglue.c
ipv4: Prepare for change of rt->rt_iif encoding.
2012-07-23 16:36:26 -07:00
ip_vti.c
net/ipv4/ip_vti.c: Fix __rcu warnings detected by sparse.
2012-07-23 13:00:54 -07:00
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: neaten __setup placement
2012-05-20 04:06:16 -04:00
ipip.c
ipv4: Adjust semantics of rt->rt_gateway.
2012-07-20 13:31:20 -07:00
ipmr.c
ipv4: Kill rt->rt_oif
2012-07-20 13:38:34 -07:00
Kconfig
net/ipv4: VTI support new module for ip_vti.
2012-07-18 09:36:12 -07:00
Makefile
net-tcp: Fast Open base
2012-07-19 10:55:36 -07:00
netfilter.c
net: Delete all remaining instances of ctl_path
2012-04-20 21:22:30 -04:00
ping.c
ipv4: Add redirect support to all protocol icmp error handlers.
2012-07-11 21:27:49 -07:00
proc.c
net-tcp: Fast Open client - sending SYN-data
2012-07-19 11:02:03 -07:00
protocol.c
inet: Sanitize inet{,6} protocol demux.
2012-06-19 18:56:21 -07:00
raw.c
ipv4: Add redirect support to all protocol icmp error handlers.
2012-07-11 21:27:49 -07:00
route.c
ipv4: Restore old dst_free() behavior.
2012-07-31 14:41:38 -07:00
syncookies.c
net-tcp: Fast Open base
2012-07-19 10:55:36 -07:00
sysctl_net_ipv4.c
ipv4: remove rt_cache_rebuild_count
2012-07-30 14:53:22 -07:00
tcp_bic.c
tcp: fix undo after RTO for BIC
2012-01-20 14:17:26 -05:00
tcp_cong.c
tcp: fix ABC in tcp_slow_start()
2012-07-20 10:59:41 -07:00
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
net-tcp: Fast Open base
2012-07-19 10:55:36 -07:00
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
net: ipv4: fix RCU races on dst refcounts
2012-07-30 14:53:22 -07:00
tcp_ipv4.c
net: ipv4: fix RCU races on dst refcounts
2012-07-30 14:53:22 -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_metrics.c
tcp: avoid oops in tcp_metrics and reset tcpm_stamp
2012-07-23 00:57:12 -07:00
tcp_minisocks.c
net: ipv4: fix RCU races on dst refcounts
2012-07-30 14:53:22 -07:00
tcp_output.c
tcp: dont drop MTU reduction indications
2012-07-23 00:58:46 -07:00
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: improve latencies of timer triggered events
2012-07-20 10:59:41 -07:00
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
tcp: Add TCP_USER_TIMEOUT negative value check
2012-07-27 13:45:50 -07:00
tunnel4.c
net: Convert printks to pr_<level>
2012-03-11 23:42:51 -07:00
udp_diag.c
net: make sock diag per-namespace
2012-07-16 22:31:34 -07:00
udp_impl.h
ipv4: fix checkpatch errors
2012-04-15 12:37:19 -04:00
udp.c
ipv4: Add redirect support to all protocol icmp error handlers.
2012-07-11 21:27:49 -07:00
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
ipv4: Turn rt->rt_route_iif into rt->rt_is_input.
2012-07-20 13:40:02 -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