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| author | Willem de Bruijn <willemb@google.com> | 2014-08-04 22:11:50 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-05 16:35:54 -0700 |
| commit | e1c8a607b28190cd09a271508aa3025d3c2f312e (patch) | |
| tree | 83f4b5e777a13535434be99bee2e764a6677e647 /net/socket.c | |
| parent | 4ed2d765dfaccff5ebdac68e2064b59125033a3b (diff) | |
| download | linux-e1c8a607b28190cd09a271508aa3025d3c2f312e.tar.gz linux-e1c8a607b28190cd09a271508aa3025d3c2f312e.tar.bz2 linux-e1c8a607b28190cd09a271508aa3025d3c2f312e.zip | |
net-timestamp: ACK timestamp for bytestreams
Add SOF_TIMESTAMPING_TX_ACK, a request for a tstamp when the last byte
in the send() call is acknowledged. It implements the feature for TCP.
The timestamp is generated when the TCP socket cumulative ACK is moved
beyond the tracked seqno for the first time. The feature ignores SACK
and FACK, because those acknowledge the specific byte, but not
necessarily the entire contents of the buffer up to that byte.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/socket.c b/net/socket.c index 3a2778d71631..ae89569a2db5 100644 --- a/net/socket.c +++ b/net/socket.c @@ -619,6 +619,8 @@ void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) *tx_flags |= SKBTX_SW_TSTAMP; if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_SCHED) *tx_flags |= SKBTX_SCHED_TSTAMP; + if (sk->sk_tsflags & SOF_TIMESTAMPING_TX_ACK) + *tx_flags |= SKBTX_ACK_TSTAMP; if (sock_flag(sk, SOCK_WIFI_STATUS)) *tx_flags |= SKBTX_WIFI_STATUS; |