dht/md-cache: Filter invalidate if the file is made a linkto file

Backport of http://review.gluster.org/15789

Upcall as a part of setattr, sends an invalidation and the
invalidation carries the resulting stat value. When a file
is converted to linkto files, even then an invalidation
is set and as a result the mountpoint shows the sticky
bit in the stat of the file.
eg: ---------T. 945 root root 0 Nov  8 10:14 hardlink.999

Fix:
When dht recieves a notification of sticky bit change, it updates
the flag, to indicate md-cache to send the subsequent lookup.

>Reviewed-on: http://review.gluster.org/15789
>Smoke: Gluster Build System <jenkins@build.gluster.org>
>NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
>Reviewed-by: Niels de Vos <ndevos@redhat.com>
>CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
>Reviewed-by: Susant Palai <spalai@redhat.com>
>Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
>(cherry picked from commit 4536f7bdf16f8286d67598eda9a46c029f0c0bf4)

Change-Id: Ic2fd7a5b196db0754f9b97072e644e6bf69da606
BUG: 1401376
Signed-off-by: Poornima G <pgurusid@redhat.com>
Reviewed-on: http://review.gluster.org/16022
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

0 files changed, 0 insertions, 0 deletions