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| 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 | |
| parent | fb31c9b9f6c85b1bad569ecedbde78d9e37cd87b (diff) | |
| download | linux-7e10b6554ff2ce7f86d5d3eec3af5db8db482caa.tar.gz linux-7e10b6554ff2ce7f86d5d3eec3af5db8db482caa.tar.bz2 linux-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 'net/ipv4')
| -rw-r--r-- | net/ipv4/tcp.c | 4 | ||||
| -rw-r--r-- | net/ipv4/tcp_input.c | 1 |
2 files changed, 5 insertions, 0 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 5ed1be88e922..d6232b598cae 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2596,6 +2596,7 @@ int tcp_disconnect(struct sock *sk, int flags) tp->compressed_ack = 0; tp->bytes_sent = 0; tp->bytes_retrans = 0; + tp->dsack_dups = 0; /* Clean up fastopen related fields */ tcp_free_fastopen_req(tp); @@ -3205,6 +3206,7 @@ void tcp_get_info(struct sock *sk, struct tcp_info *info) info->tcpi_delivered_ce = tp->delivered_ce; info->tcpi_bytes_sent = tp->bytes_sent; info->tcpi_bytes_retrans = tp->bytes_retrans; + info->tcpi_dsack_dups = tp->dsack_dups; unlock_sock_fast(sk, slow); } EXPORT_SYMBOL_GPL(tcp_get_info); @@ -3231,6 +3233,7 @@ static size_t tcp_opt_stats_get_size(void) nla_total_size(sizeof(u32)) + /* TCP_NLA_DELIVERED_CE */ nla_total_size_64bit(sizeof(u64)) + /* TCP_NLA_BYTES_SENT */ nla_total_size_64bit(sizeof(u64)) + /* TCP_NLA_BYTES_RETRANS */ + nla_total_size(sizeof(u32)) + /* TCP_NLA_DSACK_DUPS */ 0; } @@ -3282,6 +3285,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) TCP_NLA_PAD); nla_put_u64_64bit(stats, TCP_NLA_BYTES_RETRANS, tp->bytes_retrans, TCP_NLA_PAD); + nla_put_u32(stats, TCP_NLA_DSACK_DUPS, tp->dsack_dups); return stats; } 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 |