storage/posix: Look for file in "unlink" dir IFF open on real-path fails with ENOENT

        Backport of: http://review.gluster.org/#/c/15039/

PROBLEM:
In some of our users' setups, open() on the anon fd failed for
a reason other than ENOENT. But this error code is getting masked
by a subsequent open() under posix's hidden "unlink" directory, which
will fail with ENOENT because the gfid handle still exists under .glusterfs.
And the log message following the two open()s ends up logging ENOENT,
causing much confusion.

FIX:
Look for the presence of the file under "unlink" ONLY if the open()
on the real_path failed with ENOENT.

Change-Id: Id68bbe98740eea9889b17f8ea3126ed45970d26f
BUG: 1360785
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/15041
Smoke: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>

0 files changed, 0 insertions, 0 deletions