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| 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 /include/net/ipv6.h | |
| parent | ipv6: process socket-level control messages in IPv6 (diff) | |
| download | linux-dev-c14ac9451c34832554db33386a4393be8bba3a7b.tar.xz linux-dev-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 'include/net/ipv6.h')
| -rw-r--r-- | include/net/ipv6.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/net/ipv6.h b/include/net/ipv6.h index d0aeb97aec5d..55ee1eb7d026 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -867,7 +867,8 @@ int ip6_append_data(struct sock *sk, int odd, struct sk_buff *skb), void *from, int length, int transhdrlen, int hlimit, int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6, - struct rt6_info *rt, unsigned int flags, int dontfrag); + struct rt6_info *rt, unsigned int flags, int dontfrag, + const struct sockcm_cookie *sockc); int ip6_push_pending_frames(struct sock *sk); @@ -884,7 +885,8 @@ struct sk_buff *ip6_make_skb(struct sock *sk, void *from, int length, int transhdrlen, int hlimit, int tclass, struct ipv6_txoptions *opt, struct flowi6 *fl6, struct rt6_info *rt, - unsigned int flags, int dontfrag); + unsigned int flags, int dontfrag, + const struct sockcm_cookie *sockc); static inline struct sk_buff *ip6_finish_skb(struct sock *sk) { |