features/index: Delete parent dir indices when heal on it is complete

        Backport of: http://review.gluster.org/#/c/14781

In this patch, the state information about whether a directory
gfid index is present or not is stored in the inode ctx with
values IN and NOTIN. This saves index xl the need to perform
stat() everytime an index_entry_create() is called.

When a brick is restarted these in-memory inode ctx records will
be gone. So when granular entry heal happens after a brick is restarted,
and a post-op is done on the parent, if the state gotten from inode ctx
is UNKNOWN, then index xl does a stat to initialize the state as IN or
NOTIN. Note that this is a one-time operation for the lifetime of the
brick. Such a change also helps avoid calling index_del() in
xattrop_index_action() periodically even when granular self-heal is
disabled or when the volume type is disperse.

Change-Id: I037d0a8936381fbe3105e2e78489bfa571e5bdb0
BUG: 1355609
Signed-off-by: Krutika Dhananjay <kdhananj@redhat.com>
Reviewed-on: http://review.gluster.org/14896
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>

0 files changed, 0 insertions, 0 deletions