tests/xfs/435

#! /bin/bash
# FS QA Test No. 435
#
# Ensure that we don't leak dquots when CoW recovery fails.
#
# Corrupt the refcount btree to ensure that the CoW garbage collection
# (and therefore the mount) fail.
#
# On a subsequent mount attempt, we should be able to release the quota
# inodes when we're aborting the mount.  We also should not leak dquots.
#
#-----------------------------------------------------------------------
# Copyright (c) 2017, Oracle and/or its affiliates.  All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
#-----------------------------------------------------------------------

seq=`basename "$0"`
seqres="$RESULT_DIR/$seq"
echo "QA output created by $seq"

here=`pwd`
tmp=/tmp/$$
status=1    # failure is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15

_cleanup()
{
	cd /
	rm -rf "$tmp".*
}

# get standard environment, filters and checks
. ./common/rc
. ./common/filter
. ./common/attr
. ./common/reflink
. ./common/quota
. ./common/module

# real QA test starts here
_supported_os Linux
_supported_fs xfs
_require_loadable_fs_module "xfs"
_require_quota
_require_scratch_reflink
_require_cp_reflink

rm -f "$seqres.full"

echo "Format and mount"
_scratch_mkfs > "$seqres.full" 2>&1
_scratch_mount -o quota >> "$seqres.full" 2>&1

testdir="$SCRATCH_MNT/test-$seq"
blksz=65536
blks=3
mkdir "$testdir"

echo "Create a many-block file"
_pwrite_byte 0x62 0 $((blksz * blks)) $testdir/file1 >> $seqres.full
_pwrite_byte 0x63 0 $blksz $testdir/file2 >> $seqres.full
_reflink_range $testdir/file2 0 $testdir/file1 $blksz $blksz >> $seqres.full

echo "Remount to check recovery" | tee /dev/ttyprintk
_scratch_unmount
_scratch_xfs_db -x -c 'agf 0' -c 'addr refcntroot' -c 'fuzz -d recs[1].startblock ones' >> $seqres.full
_scratch_xfs_db -x -c 'agf 0' -c 'addr refcntroot' -c p >> $seqres.full
_try_scratch_mount -o quota >> $seqres.full 2>&1
_scratch_unmount 2> /dev/null
rm -f ${RESULT_DIR}/require_scratch

echo "See if we leak"
_reload_fs_module "xfs"

# success, all done
status=0
exit