diff options
| author |   Wei Wang <weiwan@google.com> | 2018-07-31 17:46:23 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-08-01 09:56:10 -0700 |
| commit | 7e10b6554ff2ce7f86d5d3eec3af5db8db482caa (patch) | |
| tree | c0c8a9dff5449d56f2ff9adf24ab0618e06957aa /net/ipv4/tcp_input.c | |
| parent | tcp: add data bytes retransmitted stats (diff) | |
| download | linux-dev-7e10b6554ff2ce7f86d5d3eec3af5db8db482caa.tar.xz linux-dev-7e10b6554ff2ce7f86d5d3eec3af5db8db482caa.zip | |
tcp: add dsack blocks received stats
Introduce a new TCP stat to record the number of DSACK blocks received
(RFC4989 tcpEStatsStackDSACKDups) and expose it in both tcp_info
(TCP_INFO) and opt_stats (SOF_TIMESTAMPING_OPT_STATS).
Signed-off-by: Wei Wang <weiwan@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv4/tcp_input.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index d51fa358b2b1..fbc85ff7d71d 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -874,6 +874,7 @@ static void tcp_dsack_seen(struct tcp_sock *tp) { tp->rx_opt.sack_ok |= TCP_DSACK_SEEN; tp->rack.dsack_seen = 1; + tp->dsack_dups++; } /* It's reordering when higher sequence was delivered (i.e. sacked) before |