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| author | Soheil Hassas Yeganeh <soheil@google.com> | 2016-04-03 05:08:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-04 21:50:30 +0200 |
| commit | c14ac9451c34832554db33386a4393be8bba3a7b (patch) | |
| tree | 99f4d7c46d01732fcbfdf8de89e1d9846d56c3b3 /net/l2tp/l2tp_ip6.c | |
| parent | ipv6: process socket-level control messages in IPv6 (diff) | |
| download | linux-c14ac9451c34832554db33386a4393be8bba3a7b.tar.xz linux-c14ac9451c34832554db33386a4393be8bba3a7b.zip | |
sock: enable timestamping using control messages
Currently, SOL_TIMESTAMPING can only be enabled using setsockopt.
This is very costly when users want to sample writes to gather
tx timestamps.
Add support for enabling SO_TIMESTAMPING via control messages by
using tsflags added in `struct sockcm_cookie` (added in the previous
patches in this series) to set the tx_flags of the last skb created in
a sendmsg. With this patch, the timestamp recording bits in tx_flags
of the skbuff is overridden if SO_TIMESTAMPING is passed in a cmsg.
Please note that this is only effective for overriding the recording
timestamps flags. Users should enable timestamp reporting (e.g.,
SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_OPT_ID) using
socket options and then should ask for SOF_TIMESTAMPING_TX_*
using control messages per sendmsg to sample timestamps for each
write.
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/l2tp/l2tp_ip6.c')
| -rw-r--r-- | net/l2tp/l2tp_ip6.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/l2tp/l2tp_ip6.c b/net/l2tp/l2tp_ip6.c index 4f29a4a0f360..1a38f20b1ca6 100644 --- a/net/l2tp/l2tp_ip6.c +++ b/net/l2tp/l2tp_ip6.c @@ -627,7 +627,7 @@ back_from_confirm: err = ip6_append_data(sk, ip_generic_getfrag, msg, ulen, transhdrlen, hlimit, tclass, opt, &fl6, (struct rt6_info *)dst, - msg->msg_flags, dontfrag); + msg->msg_flags, dontfrag, &sockc_unused); if (err) ip6_flush_pending_frames(sk); else if (!(msg->msg_flags & MSG_MORE)) |