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>

3 files changed, 4 insertions, 54 deletions

diff --git a/extras/Makefile.am b/extras/Makefile.am
index cf619329b75..2633e20a571 100644
--- a/extras/Makefile.am
+++ b/extras/Makefile.am
@@ -1,4 +1,3 @@
-
 EditorModedir = $(docdir)
 EditorMode_DATA = glusterfs-mode.el glusterfs.vim
 
@@ -13,8 +12,7 @@ vol_DATA = glusterd.vol
 
 EXTRA_DIST = specgen.scm MacOSX/Portfile glusterfs-mode.el glusterfs.vim  \
 	migrate-unify-to-distribute.sh backend-xattr-sanitize.sh          \
-	backend-cleanup.sh disk_usage_sync.sh quota-remove-xattr.sh       \
-	quota-metadata-cleanup.sh glusterfs-logrotate clear_xattrs.sh     \
-	group-virt.example glusterd-sysconfig gluster-rsyslog-7.2.conf    \
-	gluster-rsyslog-5.8.conf logger.conf.example glusterd.vol         \
-	glusterfs-georep-logrotate
+	backend-cleanup.sh disk_usage_sync.sh glusterfs-logrotate         \
+        clear_xattrs.sh group-virt.example glusterd-sysconfig             \
+        gluster-rsyslog-7.2.conf gluster-rsyslog-5.8.conf                 \
+        logger.conf.example glusterd.vol glusterfs-georep-logrotate
diff --git a/extras/quota-metadata-cleanup.sh b/extras/quota-metadata-cleanup.sh
deleted file mode 100755
index 37ad8bc3137..00000000000
--- a/extras/quota-metadata-cleanup.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/bin/bash
-
-# This script is used to cleanup xattrs setup by quota-translator in (a)
-# backend directory(ies). It takes a single or list of backend directories
-# as argument(s).
-
-usage ()
-{
-    echo >&2 "usage: $0 <list-of-backend-directories>"
-}
-
-main ()
-{
-    [ $# -lt 1 ] && usage
-
-    INSTALL_DIR=`dirname $0`
-
-    for i in $@; do
-        find $i -exec $INSTALL_DIR/quota-remove-xattr.sh '{}' \;
-    done
-    
-}
-
-main $@
diff --git a/extras/quota-remove-xattr.sh b/extras/quota-remove-xattr.sh
deleted file mode 100755
index 7191f9bd443..00000000000
--- 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 $@