quota/marker: fix inode quota with rename

There are three problems with marker-rename which
is fixed in this patch

Problem 1)
1) mq_reduce_parent_size is not handling inode-quota contribution
2) When dest files exists and IO is happening
   Now renaming will overwrite existing file
   mq_reduce_parent_size called on dest file
   with saved contribution, this can be
   a problem is IO is still happening
   contribution might have changed

Problem 2)
There is a small race between rename and in-progress write
Consider below scenario
1) rename FOP invoked on file 'x'
2) write is still in progress for file 'x'
3) rename takes a lock on old-parent
4) write-update txn blocked on old-parent to acquire lock
5) in rename_cbk, contri xattrs are removed and contribution is deleted and
   lock is released
6) now write-update txn gets the lock and updates the wrong parent
   as it was holding lock on old parent
   so validate parent once the lock is acquired

Problem 3)
when a rename operation is performed, a lock is
held on old parent. This lock is release before
unwinding the rename operation.
This can be a problem if there are in-progress
writes happening during rename, where update txn
can take a lock and update the old parent
as inode table is not updated with new parent

Change-Id: Ic3316097c001c33533f98592e8fcf234b1ee2aa2
BUG: 1240991
Signed-off-by: vmallika <vmallika@redhat.com>
Reviewed-on: http://review.gluster.org/11578
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Tested-by: NetBSD Build System <jenkins@build.gluster.org>
Reviewed-by: Raghavendra G <rgowdapp@redhat.com>

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/bugs/quota/bug-1240991.t b/tests/bugs/quota/bug-1240991.t
new file mode 100644
index 00000000000..2a1a6d1868e
--- /dev/null
+++ b/tests/bugs/quota/bug-1240991.t
@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# This regression test tries to ensure renaming a directory with content, and
+# no limit set, is accounted properly, when moved into a directory with quota
+# limit set.
+
+. $(dirname $0)/../../include.rc
+. $(dirname $0)/../../volume.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd;
+TEST $CLI volume info;
+
+TEST $CLI volume create $V0 $H0:$B0/${V0}
+TEST $CLI volume start $V0;
+
+TEST $CLI volume quota $V0 enable;
+
+TEST glusterfs --volfile-id=$V0 --volfile-server=$H0 $M0;
+
+TEST $CLI volume quota $V0 hard-timeout 0
+TEST $CLI volume quota $V0 soft-timeout 0
+
+TEST mkdir -p $M0/dir/dir1
+TEST $CLI volume quota $V0 limit-objects /dir 20
+
+TEST mkdir $M0/dir/dir1/d{1..5}
+TEST touch $M0/dir/dir1/f{1..5}
+TEST mv $M0/dir/dir1 $M0/dir/dir2
+
+#Number of files under /dir is 5
+EXPECT_WITHIN $MARKER_UPDATE_TIMEOUT "5" quota_object_list_field "/dir" 4
+
+#Number of directories under /dir is 7
+EXPECT_WITHIN $MARKER_UPDATE_TIMEOUT "7" quota_object_list_field "/dir" 5
+
+TEST $CLI volume stop $V0
+TEST $CLI volume delete $V0
+EXPECT "1" get_aux
+
+cleanup;