md-cache: Invalidate cache entry for open() with O_TRUNC

When a file is opened with O_TRUNC flag set, its size gets
set to '0'. This case needs to be handled in md-cache to
avoid sending incorrect cached stat.

This is backport of below mainline patch -
http://review.gluster.org/#/c/15618/

> Change-Id: I95d1f8a6634734898883ede010c3e7b0b7eb97d9
> BUG: 1382266
> Signed-off-by: Soumya Koduri <skoduri@redhat.com>
> Reviewed-on: http://review.gluster.org/15618
> Smoke: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: jiffin tony Thottan <jthottan@redhat.com>
> Tested-by: jiffin tony Thottan <jthottan@redhat.com>
> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
> CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
> (cherry picked from commit 6ca5d6382f03685b31b12accb095093cf1486603)

Change-Id: I00d2b0a6dbafa690235bbc7cd714ec7cc8a13808
BUG: 1391451
Signed-off-by: Soumya Koduri <skoduri@redhat.com>
Reviewed-on: http://review.gluster.org/15772
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

0 files changed, 0 insertions, 0 deletions