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| author | Eric Dumazet <edumazet@google.com> | 2015-01-30 06:35:05 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-02-02 08:06:19 +0100 |
| commit | bdbbb8527b6f6a358dbcb70dac247034d665b8e4 (patch) | |
| tree | d3c764600d9d7a18956943fcb5c0de8f2e0a6c43 /include/net/netns/ipv4.h | |
| parent | net: sched: fix panic in rate estimators (diff) | |
| download | linux-bdbbb8527b6f6a358dbcb70dac247034d665b8e4.tar.xz linux-bdbbb8527b6f6a358dbcb70dac247034d665b8e4.zip | |
ipv4: tcp: get rid of ugly unicast_sock
In commit be9f4a44e7d41 ("ipv4: tcp: remove per net tcp_sock")
I tried to address contention on a socket lock, but the solution
I chose was horrible :
commit 3a7c384ffd57e ("ipv4: tcp: unicast_sock should not land outside
of TCP stack") addressed a selinux regression.
commit 0980e56e506b ("ipv4: tcp: set unicast_sock uc_ttl to -1")
took care of another regression.
commit b5ec8eeac46 ("ipv4: fix ip_send_skb()") fixed another regression.
commit 811230cd85 ("tcp: ipv4: initialize unicast_sock sk_pacing_rate")
was another shot in the dark.
Really, just use a proper socket per cpu, and remove the skb_orphan()
call, to re-enable flow control.
This solves a serious problem with FQ packet scheduler when used in
hostile environments, as we do not want to allocate a flow structure
for every RST packet sent in response to a spoofed packet.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/netns/ipv4.h')
| -rw-r--r-- | include/net/netns/ipv4.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h index 24945cefc4fd..0ffef1a38efc 100644 --- a/include/net/netns/ipv4.h +++ b/include/net/netns/ipv4.h @@ -52,6 +52,7 @@ struct netns_ipv4 { struct inet_peer_base *peers; struct tcpm_hash_bucket *tcp_metrics_hash; unsigned int tcp_metrics_hash_log; + struct sock * __percpu *tcp_sk; struct netns_frags frags; #ifdef CONFIG_NETFILTER struct xt_table *iptable_filter; |