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authorSoheil Hassas Yeganeh <soheil@google.com>2016-04-02 23:08:12 -0400
committerDavid S. Miller <davem@davemloft.net>2016-04-04 15:50:30 -0400
commitc14ac9451c34832554db33386a4393be8bba3a7b (patch)
tree99f4d7c46d01732fcbfdf8de89e1d9846d56c3b3 /net/l2tp
parentad1e46a837163a3e7160a1250825bcfafd2e714b (diff)
downloadlinux-c14ac9451c34832554db33386a4393be8bba3a7b.tar.bz2
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')
-rw-r--r--net/l2tp/l2tp_ip6.c2
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))