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Filipe Manana
5db58785e6
Test that when a fsync journal/log exists, if we rename a special file (fifo, symbolic link or device), create a hard link for it with its old name and then commit the journal/log, if a power loss happens the filesystem will not fail to replay the journal/log when it is mounted the next time. This test is motivated by a bug found in btrfs, which is fixed by the following patch for the linux kernel: "Btrfs: fix log replay failure after linking special file and fsync" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
113 lines
3.1 KiB
Bash
113 lines
3.1 KiB
Bash
#! /bin/bash
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# FSQA Test No. 479
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#
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# Test that when a fsync journal/log exists, if we rename a special file (fifo,
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# symbolic link or device), create a hard link for it with its old name and then
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# commit the journal/log, if a power loss happens the filesystem will not fail
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# to replay the journal/log when it is mounted the next time.
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#
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#-----------------------------------------------------------------------
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#
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# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
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# Author: Filipe Manana <fdmanana@suse.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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_cleanup_flakey
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/dmflakey
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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_require_dm_target flakey
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rm -f $seqres.full
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run_test()
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{
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local file_type=$1
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_scratch_mkfs >>$seqres.full 2>&1
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_require_metadata_journaling $SCRATCH_DEV
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_init_flakey
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_mount_flakey
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mkdir $SCRATCH_MNT/testdir
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case $file_type in
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symlink)
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ln -s xxx $SCRATCH_MNT/testdir/foo
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;;
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fifo)
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mkfifo $SCRATCH_MNT/testdir/foo
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;;
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dev)
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mknod $SCRATCH_MNT/testdir/foo c 0 0
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;;
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*)
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_fail "Invalid file type argument: $file_type"
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esac
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# Make sure everything done so far is durably persisted.
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sync
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# Create a file and fsync it just to create a journal/log. This file
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# must be in the same directory as our special file "foo".
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touch $SCRATCH_MNT/testdir/f1
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/f1
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# Rename our special file and then create link that has its old name.
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mv $SCRATCH_MNT/testdir/foo $SCRATCH_MNT/testdir/bar
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ln $SCRATCH_MNT/testdir/bar $SCRATCH_MNT/testdir/foo
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# Create a second file and fsync it. This is just to durably persist the
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# fsync journal/log which is typically modified by the previous rename
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# and link operations. This file does not need to be placed in the same
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# directory as our special file.
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touch $SCRATCH_MNT/f2
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$XFS_IO_PROG -c "fsync" $SCRATCH_MNT/f2
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# Simulate a power failure and mount the filesystem to check that
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# replaying the fsync log/journal succeeds, that is the mount operation
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# does not fail.
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_flakey_drop_and_remount
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_unmount_flakey
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_cleanup_flakey
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}
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run_test symlink
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run_test fifo
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run_test dev
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echo "Silence is golden"
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status=0
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exit
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