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 /include | |
| parent | fb31c9b9f6c85b1bad569ecedbde78d9e37cd87b (diff) | |
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 'include')
| -rw-r--r-- | include/linux/tcp.h | 3 | ||||
| -rw-r--r-- | include/uapi/linux/tcp.h | 2 |
2 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/tcp.h b/include/linux/tcp.h index fb67f9a51b95..da6281c549a5 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -188,6 +188,9 @@ struct tcp_sock { * sum(delta(snd_una)), or how many bytes * were acked. */ + u32 dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups + * total number of DSACK blocks received + */ u32 snd_una; /* First byte we want an ack for */ u32 snd_sml; /* Last byte of the most recently transmitted small packet */ u32 rcv_tstamp; /* timestamp of last received ACK (for keepalives) */ diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index c31f5100b744..0e1c0aec0153 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -238,6 +238,7 @@ struct tcp_info { __u64 tcpi_bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut */ __u64 tcpi_bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans */ + __u32 tcpi_dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups */ }; /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ @@ -262,6 +263,7 @@ enum { TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */ TCP_NLA_BYTES_SENT, /* Data bytes sent including retransmission */ TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */ + TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ }; /* for TCP_MD5SIG socket option */ |