From: Willem de Bruijn <willemb@google.com>
Date: Tue, 5 Aug 2014 02:11:45 +0000 (-0400)
Subject: net-timestamp: extend SCM_TIMESTAMPING ancillary data struct
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~149^2~8^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f24b9be5957b38bb420b838115040dc2031b7d0c;p=pandora-kernel.git

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>
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