tree f4bc73c2887e183bcb33c1187292fbb5072cd280
parent a5d371cda6de55234238d98556f7da6acac1d7b6
author Chenbo Feng <fengc@google.com> 1491444055 -0700
committer Chenbo Feng <fengc@google.com> 1496191984 +0000

BACKPORT [FROMLIST] New getsockopt option to get socket cookie

Cherry-pick from linux net-next branch commit
http://patchwork.ozlabs.org/patch/747590/

Introduce a new getsockopt operation to retrieve the socket cookie
for a specific socket based on the socket fd.  It returns a unique
non-decreasing cookie for each socket.
Tested: https://android-review.googlesource.com/#/c/358163/

Test: Unit test added in kernel/tests

Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Chenbo Feng <fengc@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>