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tcp: export packets delivery info

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Export data delivered and delivered with CE marks to
1) SNMP TCPDelivered and TCPDeliveredCE
2) getsockopt(TCP_INFO)
3) Timestamping API SOF_TIMESTAMPING_OPT_STATS

Note that for SCM_TSTAMP_ACK, the delivery info in
SOF_TIMESTAMPING_OPT_STATS is reported before the info
was fully updated on the ACK.

These stats help application monitor TCP delivery and ECN status
on per host, per connection, even per message level.

Signed-off-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Soheil Hassas Yeganeh <soheil@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuchung Cheng
2018-04-17 23:18:49 -07:00
committed by David S. Miller
parent e21db6f69a
commit feb5f2ec64
5 changed files with 20 additions and 2 deletions
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5
include/uapi/linux/tcp.h
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@@ -224,6 +224,9 @@ struct tcp_info {
__u64 tcpi_busy_time; /* Time (usec) busy sending data */
__u64 tcpi_rwnd_limited; /* Time (usec) limited by receive window */
__u64 tcpi_sndbuf_limited; /* Time (usec) limited by send buffer */
__u32 tcpi_delivered;
__u32 tcpi_delivered_ce;
};
/* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */
@@ -244,6 +247,8 @@ enum {
TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */
TCP_NLA_CA_STATE, /* ca_state of socket */
TCP_NLA_SND_SSTHRESH, /* Slow start size threshold */
TCP_NLA_DELIVERED, /* Data pkts delivered incl. out-of-order */
TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */
};