quota/marker: dir_count accounting is not atomic

Consider below scenario:

Quota enabled on pre-existing data
Now quota-crawl process will start healing xattrs
Now if write is performed where healing is not complete, there is a
possibility that 'update txn' is started before 'create xattr txn', in
this case dir count can be missed on a dir where quota size xattr is not
yet created.

Solution is to get size xattr and if xattr is missing, add 1 for
dir_count, this requires one additional fop if done in marker during
each update iteration
Better solution is to us xattrop GF_XATTROP_ADD_ARRAY64_WITH_DEFAULT

Change-Id: Idc8978860a3914e70c98f96effeff52e9a24e6ba
BUG: 1243798
Signed-off-by: vmallika <vmallika@redhat.com>
Reviewed-on: http://review.gluster.org/11694
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

0 files changed, 0 insertions, 0 deletions