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| author | Willem de Bruijn <willemb@google.com> | 2014-08-04 22:11:45 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-08-05 16:35:53 -0700 |
| commit | f24b9be5957b38bb420b838115040dc2031b7d0c (patch) | |
| tree | 9fdb50bbe86f08ff9c012137fa854d45e156b8f9 /include/linux/skbuff.h | |
| parent | a2b81b35f9e5ade210e4df2001f7a30ac390114d (diff) | |
| download | lwn-f24b9be5957b38bb420b838115040dc2031b7d0c.tar.gz lwn-f24b9be5957b38bb420b838115040dc2031b7d0c.zip | |
net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
Applications that request kernel tx timestamps with SO_TIMESTAMPING
read timestamps as recvmsg() ancillary data. The response is defined
implicitly as timespec[3].
1) define struct scm_timestamping explicitly and
2) add support for new tstamp types. On tx, scm_timestamping always
accompanies a sock_extended_err. Define previously unused field
ee_info to signal the type of ts[0]. Introduce SCM_TSTAMP_SND to
define the existing behavior.
The reception path is not modified. On rx, no struct similar to
sock_extended_err is passed along with SCM_TIMESTAMPING.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 281deced7469..477f0f60db45 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -249,6 +249,9 @@ enum { SKBTX_SHARED_FRAG = 1 << 5, }; +#define SKBTX_ANY_SW_TSTAMP SKBTX_SW_TSTAMP +#define SKBTX_ANY_TSTAMP (SKBTX_HW_TSTAMP | SKBTX_ANY_SW_TSTAMP) + /* * The callback notifies userspace to release buffers when skb DMA is done in * lower device, the skb last reference should be 0 when calling this. |