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| author | Yuchung Cheng | 2017-01-28 01:24:38 +0100 |
|---|---|---|
| committer | David S. Miller | 2017-01-30 01:17:23 +0100 |
| commit | 7e98102f489775d8c000884fca8a0d995ea688a9 (patch) | |
| tree | 40a40dc7f485407ab82f3851f8a50ba8337525c6 | |
| parent | Merge branch 'qcom-emac-misc' (diff) | |
| download | kernel-qcow2-linux-7e98102f489775d8c000884fca8a0d995ea688a9.tar.gz kernel-qcow2-linux-7e98102f489775d8c000884fca8a0d995ea688a9.tar.xz kernel-qcow2-linux-7e98102f489775d8c000884fca8a0d995ea688a9.zip | |
tcp: record pkts sent and retransmistted
Add two stats in SCM_TIMESTAMPING_OPT_STATS:
TCP_NLA_DATA_SEGS_OUT: total data packets sent including retransmission
TCP_NLA_TOTAL_RETRANS: total data packets retransmitted
The names are picked to be consistent with corresponding fields in
TCP_INFO. This allows applications that are using the timestamping
API to measure latency stats to also retrive retransmission rate
of application write.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/uapi/linux/tcp.h | 2 | ||||
| -rw-r--r-- | net/ipv4/tcp.c | 6 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index 6ff35eb48d10..38a2b07afdff 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -227,6 +227,8 @@ enum { TCP_NLA_BUSY, /* Time (usec) busy sending data */ TCP_NLA_RWND_LIMITED, /* Time (usec) limited by receive window */ TCP_NLA_SNDBUF_LIMITED, /* Time (usec) limited by send buffer */ + TCP_NLA_DATA_SEGS_OUT, /* Data pkts sent including retransmission */ + TCP_NLA_TOTAL_RETRANS, /* Data pkts retransmitted */ }; /* for TCP_MD5SIG socket option */ diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 2ed472ebf3b5..b751abc56935 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -2870,7 +2870,7 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) struct sk_buff *stats; struct tcp_info info; - stats = alloc_skb(3 * nla_total_size_64bit(sizeof(u64)), GFP_ATOMIC); + stats = alloc_skb(5 * nla_total_size_64bit(sizeof(u64)), GFP_ATOMIC); if (!stats) return NULL; @@ -2881,6 +2881,10 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk) info.tcpi_rwnd_limited, TCP_NLA_PAD); nla_put_u64_64bit(stats, TCP_NLA_SNDBUF_LIMITED, info.tcpi_sndbuf_limited, TCP_NLA_PAD); + nla_put_u64_64bit(stats, TCP_NLA_DATA_SEGS_OUT, + tp->data_segs_out, TCP_NLA_PAD); + nla_put_u64_64bit(stats, TCP_NLA_TOTAL_RETRANS, + tp->total_retrans, TCP_NLA_PAD); return stats; } |