diff options
| author | Soheil Hassas Yeganeh <soheil@google.com> | 2016-04-02 23:08:12 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-04 15:50:30 -0400 |
| commit | c14ac9451c34832554db33386a4393be8bba3a7b (patch) | |
| tree | 99f4d7c46d01732fcbfdf8de89e1d9846d56c3b3 /net/ipv6/ping.c | |
| parent | ad1e46a837163a3e7160a1250825bcfafd2e714b (diff) | |
| download | linux-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/ipv6/ping.c')
| -rw-r--r-- | net/ipv6/ping.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c index c382db7a2e73..da1cff79e447 100644 --- a/net/ipv6/ping.c +++ b/net/ipv6/ping.c @@ -62,6 +62,7 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) struct dst_entry *dst; struct rt6_info *rt; struct pingfakehdr pfh; + struct sockcm_cookie junk = {0}; pr_debug("ping_v6_sendmsg(sk=%p,sk->num=%u)\n", inet, inet->inet_num); @@ -144,7 +145,7 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) err = ip6_append_data(sk, ping_getfrag, &pfh, len, 0, hlimit, np->tclass, NULL, &fl6, rt, - MSG_DONTWAIT, np->dontfrag); + MSG_DONTWAIT, np->dontfrag, &junk); if (err) { ICMP6_INC_STATS(sock_net(sk), rt->rt6i_idev, |