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| author | Eric Dumazet <edumazet@google.com> | 2012-07-26 12:18:11 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-26 15:50:39 -0700 |
| commit | c7109986db3c945f50ceed884a30e0fd8af3b89b (patch) | |
| tree | c0852e90a7d06bdc95a54d6adad19d2a9e3d7d5e /net | |
| parent | c6cffba4ffa26a8ffacd0bb9f3144e34f20da7de (diff) | |
| download | linux-stable-c7109986db3c945f50ceed884a30e0fd8af3b89b.tar.gz linux-stable-c7109986db3c945f50ceed884a30e0fd8af3b89b.tar.bz2 linux-stable-c7109986db3c945f50ceed884a30e0fd8af3b89b.zip | |
ipv6: Early TCP socket demux
This is the IPv6 missing bits for infrastructure added in commit
41063e9dd1195 (ipv4: Early TCP socket demux.)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_input.c | 1 | ||||
| -rw-r--r-- | net/ipv6/ip6_input.c | 13 | ||||
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 38 |
3 files changed, 50 insertions, 2 deletions
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c index bda8cac2ae91..981ff1eef28c 100644 --- a/net/ipv4/ip_input.c +++ b/net/ipv4/ip_input.c @@ -314,6 +314,7 @@ drop: } int sysctl_ip_early_demux __read_mostly = 1; +EXPORT_SYMBOL(sysctl_ip_early_demux); static int ip_rcv_finish(struct sk_buff *skb) { diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c index 5ab923e51af3..47975e363fcd 100644 --- a/net/ipv6/ip6_input.c +++ b/net/ipv6/ip6_input.c @@ -47,9 +47,18 @@ -inline int ip6_rcv_finish( struct sk_buff *skb) +int ip6_rcv_finish(struct sk_buff *skb) { - if (skb_dst(skb) == NULL) + if (sysctl_ip_early_demux && !skb_dst(skb)) { + const struct inet6_protocol *ipprot; + + rcu_read_lock(); + ipprot = rcu_dereference(inet6_protos[ipv6_hdr(skb)->nexthdr]); + if (ipprot && ipprot->early_demux) + ipprot->early_demux(skb); + rcu_read_unlock(); + } + if (!skb_dst(skb)) ip6_route_input(skb); return dst_input(skb); diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index f49476e2d884..221224e72507 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1674,6 +1674,43 @@ do_time_wait: goto discard_it; } +static void tcp_v6_early_demux(struct sk_buff *skb) +{ + const struct ipv6hdr *hdr; + const struct tcphdr *th; + struct sock *sk; + + if (skb->pkt_type != PACKET_HOST) + return; + + if (!pskb_may_pull(skb, skb_transport_offset(skb) + sizeof(struct tcphdr))) + return; + + hdr = ipv6_hdr(skb); + th = tcp_hdr(skb); + + if (th->doff < sizeof(struct tcphdr) / 4) + return; + + sk = __inet6_lookup_established(dev_net(skb->dev), &tcp_hashinfo, + &hdr->saddr, th->source, + &hdr->daddr, ntohs(th->dest), + inet6_iif(skb)); + if (sk) { + skb->sk = sk; + skb->destructor = sock_edemux; + if (sk->sk_state != TCP_TIME_WAIT) { + struct dst_entry *dst = sk->sk_rx_dst; + struct inet_sock *icsk = inet_sk(sk); + if (dst) + dst = dst_check(dst, 0); + if (dst && + icsk->rx_dst_ifindex == inet6_iif(skb)) + skb_dst_set_noref(skb, dst); + } + } +} + static struct timewait_sock_ops tcp6_timewait_sock_ops = { .twsk_obj_size = sizeof(struct tcp6_timewait_sock), .twsk_unique = tcp_twsk_unique, @@ -1984,6 +2021,7 @@ struct proto tcpv6_prot = { }; static const struct inet6_protocol tcpv6_protocol = { + .early_demux = tcp_v6_early_demux, .handler = tcp_v6_rcv, .err_handler = tcp_v6_err, .gso_send_check = tcp_v6_gso_send_check, |