features/quota: Metadata cleanup

Quota and marker uses 'trusted.glusterfs.quota*' and 'trusted.pgfid*' xattrs to
store its configurations and accounting information and also to build the
parent inode chain in case of absense of path.

Problem:
After disabling and then enabling quota back, the xattrs may contain stale data
leading to impaired accounting and thus improper enforcement.

Solution:
Clean up all the quota related xattrs after quota disable.

Marker xlator implements a virtual xattr to cleanup quota and pgfid xattrs. In
this approach glusterd mounts an auxiliary mount and sends the below command to
all the files by crawling the mountpoint.

 #setfattr -n "glusterfs.quota-xattr-cleanup" -v 1 <path/to/file>

Credit:
Krishnan Parthasarathi <kparthas@redhat.com>
Varun Shastry          <vshastry@redhat.com>
Change-Id: I9380eca58a285dc27dd572de1767aac8f2cd8049
BUG: 969461
Signed-off-by: Varun Shastry <vshastry@redhat.com>
Reviewed-on: http://review.gluster.org/6369
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>

1 files changed, 0 insertions, 24 deletions

diff --git a/extras/quota-remove-xattr.sh b/extras/quota-remove-xattr.sh
deleted file mode 100755
index 7191f9bd4..000000000
--- a/extras/quota-remove-xattr.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/bin/bash
-
-# This script is used to remove xattrs set by quota translator on a path.
-# It is generally invoked from quota-metadata-cleanup.sh, but can
-# also be used stand-alone.
-
-usage ()
-{
-    echo >&2 "usage: $0 <path>"
-}
-
-main ()
-{
-    [ $# -ne 1 ] && usage $0
-
-    XATTR_KEY_VALUE_PAIRS=`getfattr -h -d -m 'trusted.glusterfs.quota' $1 2>/dev/null | sed -e '/^# file/d'`
-
-    for i in $XATTR_KEY_VALUE_PAIRS; do
-        XATTR_KEY=`echo $i | sed -e 's/\([^=]*\).*/\1/g'`
-        setfattr -h -x $XATTR_KEY $1
-    done
-}
-
-main $@