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| author |   Yousuk Seung <ysseung@google.com> | 2020-07-30 15:44:40 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2020-07-31 17:00:44 -0700 |
| commit | 48040793fa6003d211f021c6ad273477bcd90d91 (patch) | |
| tree | 7a37d2d4390b9aa54bc87465b94ab358b4dedfcd /include/uapi/linux/tcp.h | |
| parent | Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queue (diff) | |
| download | linux-48040793fa6003d211f021c6ad273477bcd90d91.tar.xz linux-48040793fa6003d211f021c6ad273477bcd90d91.zip | |
tcp: add earliest departure time to SCM_TIMESTAMPING_OPT_STATS
This change adds TCP_NLA_EDT to SCM_TIMESTAMPING_OPT_STATS that reports
the earliest departure time(EDT) of the timestamped skb. By tracking EDT
values of the skb from different timestamps, we can observe when and how
much the value changed. This allows to measure the precise delay
injected on the sender host e.g. by a bpf-base throttler.
Signed-off-by: Yousuk Seung <ysseung@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/uapi/linux/tcp.h')
| -rw-r--r-- | include/uapi/linux/tcp.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index f2acb2566333..cfcb10b75483 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -313,6 +313,7 @@ enum { TCP_NLA_SRTT, /* smoothed RTT in usecs */ TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */ TCP_NLA_BYTES_NOTSENT, /* Bytes in write queue not yet sent */ + TCP_NLA_EDT, /* Earliest departure time (CLOCK_MONOTONIC) */ }; /* for TCP_MD5SIG socket option */ |