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Hannes Frederic Sowa 5a3da1fe95 inet: limit length of fragment queue hash table bucket lists 
This patch introduces a constant limit of the fragment queue hash
table bucket list lengths. Currently the limit 128 is choosen somewhat
arbitrary and just ensures that we can fill up the fragment cache with
empty packets up to the default ip_frag_high_thresh limits. It should
just protect from list iteration eating considerable amounts of cpu.

If we reach the maximum length in one hash bucket a warning is printed.
This is implemented on the caller side of inet_frag_find to distinguish
between the different users of inet_fragment.c.

I dropped the out of memory warning in the ipv4 fragment lookup path,
because we already get a warning by the slab allocator.

Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jesper Dangaard Brouer <jbrouer@redhat.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2013-03-19 10:28:36 -04:00
..
netfilter Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2013-02-26 20:16:07 -08:00
Kconfig net/ipv4: remove depends on CONFIG_EXPERIMENTAL 2013-01-11 11:40:00 -08:00
Makefile
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af_inet.c IP_GRE: Fix IP-Identification. 2013-02-25 15:47:41 -05:00
ah4.c net: Add skb_unclone() helper function. 2013-02-15 15:10:37 -05:00
arp.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
cipso_ipv4.c
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datagram.c ipv4: Add a socket release callback for datagram sockets 2013-01-21 14:17:05 -05:00
devinet.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
esp4.c xfrm4: Invalidate all ipv4 routes on IPsec pmtu events 2013-01-21 12:43:54 +01:00
fib_frontend.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
fib_lookup.h
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fib_rules.c
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fib_semantics.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
fib_trie.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
gre.c v4 GRE: Add TCP segmentation offload for GRE 2013-02-15 15:17:11 -05:00
icmp.c ipv4: fix error handling in icmp_protocol. 2013-02-22 15:10:18 -05:00
igmp.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
inet_connection_sock.c Fix: sparse warning in inet_csk_prepare_forced_close 2013-03-07 16:31:29 -05:00
inet_diag.c
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inet_fragment.c inet: limit length of fragment queue hash table bucket lists 2013-03-19 10:28:36 -04:00
inet_hashtables.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
inet_lro.c
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inet_timewait_sock.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
inetpeer.c
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ip_forward.c
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ip_fragment.c inet: limit length of fragment queue hash table bucket lists 2013-03-19 10:28:36 -04:00
ip_gre.c Revert "ip_gre: make ipgre_tunnel_xmit() not parse network header as IP unconditionally" 2013-03-16 23:00:41 -04:00
ip_input.c ipv[4|6]: correct dropwatch false positive in local_deliver_finish 2013-03-01 15:56:29 -05:00
ip_options.c net/ipv4: Ensure that location of timestamp option is stored 2013-03-12 05:35:39 -04:00
ip_output.c net: Fix possible wrong checksum generation. 2013-02-13 13:30:10 -05:00
ip_sockglue.c net: prevent setting ttl=0 via IP_TTL 2013-01-08 17:57:10 -08:00
ip_vti.c
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ipcomp.c ipcomp: Mark as netns_ok. 2013-02-04 15:46:15 -05:00
ipconfig.c net: proc: change proc_net_fops_create to proc_create 2013-02-18 14:53:08 -05:00
ipip.c net: fix possible wrong checksum generation 2013-01-28 00:27:15 -05:00
ipmr.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
netfilter.c
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ping.c ipv4: fix a bug in ping_err(). 2013-02-21 15:25:00 -05:00
proc.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
protocol.c ipv4: Disallow non-namespace aware protocols to register. 2013-02-05 14:42:23 -05:00
raw.c hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
route.c net: ipv4: fix waring -Wunused-variable 2013-02-19 13:18:13 -05:00
syncookies.c tcp: make sysctl_tcp_ecn namespace aware 2013-01-06 21:09:56 -08:00
sysctl_net_ipv4.c tcp: remove Appropriate Byte Count support 2013-02-05 14:51:16 -05:00
tcp.c tcp: fix skb_availroom() 2013-03-14 11:49:45 -04:00
tcp_bic.c
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tcp_cong.c tcp: remove Appropriate Byte Count support 2013-02-05 14:51:16 -05:00
tcp_cubic.c
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tcp_diag.c
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tcp_fastopen.c
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tcp_highspeed.c
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tcp_htcp.c
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tcp_hybla.c
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tcp_illinois.c
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tcp_input.c tcp: fix double-counted receiver RTT when leaving receiver fast path 2013-03-04 14:12:07 -05:00
tcp_ipv4.c tcp: dont handle MTU reduction on LISTEN socket 2013-03-18 13:31:28 -04:00
tcp_lp.c
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tcp_memcontrol.c
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tcp_metrics.c
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tcp_minisocks.c tcp: send packets with a socket timestamp 2013-02-13 13:22:16 -05:00
tcp_output.c tcp: fix skb_availroom() 2013-03-14 11:49:45 -04:00
tcp_probe.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
tcp_scalable.c
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tcp_timer.c
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tcp_vegas.c
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tcp_vegas.h
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tcp_veno.c
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tcp_westwood.c
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tcp_yeah.c
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tunnel4.c
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udp.c net: proc: change proc_net_remove to remove_proc_entry 2013-02-18 14:53:08 -05:00
udp_diag.c
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udp_impl.h
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udplite.c
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xfrm4_input.c net: Add skb_unclone() helper function. 2013-02-15 15:10:37 -05:00
xfrm4_mode_beet.c
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xfrm4_mode_transport.c
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xfrm4_mode_tunnel.c ip: fix warning in xfrm4_mode_tunnel_input 2013-02-18 12:42:48 -05:00
xfrm4_output.c
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xfrm4_policy.c xfrm: make gc_thresh configurable in all namespaces 2013-02-06 11:36:29 +01:00
xfrm4_state.c
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xfrm4_tunnel.c
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