diff options
| author |   Octavian Purdila <octavian.purdila@intel.com> | 2014-06-25 17:09:51 +0300 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-06-27 15:53:35 -0700 |
| commit | aa27fc501850030fb5d1ee705feb836ee6a21f2a (patch) | |
| tree | b91842d21980aa13fb980dcf0891ced53a342738 /net/ipv6 | |
| parent | tcp: cookie_v4_init_sequence: skb should be const (diff) | |
| download | linux-dev-aa27fc501850030fb5d1ee705feb836ee6a21f2a.tar.xz linux-dev-aa27fc501850030fb5d1ee705feb836ee6a21f2a.zip | |
tcp: tcp_v[46]_conn_request: fix snt_synack initialization
Commit 016818d07 (tcp: TCP Fast Open Server - take SYNACK RTT after
completing 3WHS) changes the code to only take a snt_synack timestamp
when a SYNACK transmit or retransmit succeeds. This behaviour is later
broken by commit 843f4a55e (tcp: use tcp_v4_send_synack on first
SYN-ACK), as snt_synack is now updated even if tcp_v4_send_synack
fails.
Also, commit 3a19ce0ee (tcp: IPv6 support for fastopen server) misses
the required IPv6 updates for 016818d07.
This patch makes sure that snt_synack is updated only when the SYNACK
trasnmit/retransmit succeeds, for both IPv4 and IPv6.
Cc: Cardwell <ncardwell@google.com>
Cc: Daniel Lee <longinus00@gmail.com>
Cc: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Octavian Purdila <octavian.purdila@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
| -rw-r--r-- | net/ipv6/tcp_ipv6.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index 08ae3da0db4a..a962455471ba 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -497,6 +497,8 @@ static int tcp_v6_send_synack(struct sock *sk, struct dst_entry *dst, skb_set_queue_mapping(skb, queue_mapping); err = ip6_xmit(sk, skb, fl6, np->opt, np->tclass); err = net_xmit_eval(err); + if (!tcp_rsk(req)->snt_synack && !err) + tcp_rsk(req)->snt_synack = tcp_time_stamp; } done: @@ -1100,7 +1102,6 @@ have_isn: goto drop_and_free; tcp_rsk(req)->snt_isn = isn; - tcp_rsk(req)->snt_synack = tcp_time_stamp; tcp_openreq_init_rwin(req, sk, dst); fastopen = !want_cookie && tcp_try_fastopen(sk, skb, req, &foc, dst); |