From: Filipe Manana <fdmanana@xxxxxxxx>
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@xxxxxxxx>
---
tests/generic/479 | 112 ++++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/479.out | 2 +
tests/generic/group | 1 +
3 files changed, 115 insertions(+)
create mode 100644 tests/generic/479
create mode 100644 tests/generic/479.out
diff --git a/tests/generic/479 b/tests/generic/479
new file mode 100644
index 00000000..7e4ba7d0
--- /dev/null
+++ b/tests/generic/479
@@ -0,0 +1,112 @@
+#! /bin/bash
+# FSQA Test No. 479
+#
+# 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.
+#
+#-----------------------------------------------------------------------
+#
+# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
+# Author: Filipe Manana <fdmanana@xxxxxxxx>
+#
+# 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"
+tmp=/tmp/$$
+status=1 # failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+ _cleanup_flakey
+ cd /
+ rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/dmflakey
+
+# real QA test starts here
+_supported_fs generic
+_supported_os Linux
+_require_scratch
+_require_dm_target flakey
+
+rm -f $seqres.full
+
+run_test()
+{
+ local file_type=$1
+
+ _scratch_mkfs >>$seqres.full 2>&1
+ _require_metadata_journaling $SCRATCH_DEV
+ _init_flakey
+ _mount_flakey
+
+ mkdir $SCRATCH_MNT/testdir
+ case $file_type in
+ symlink)
+ ln -s xxx $SCRATCH_MNT/testdir/foo
+ ;;
+ fifo)
+ mkfifo $SCRATCH_MNT/testdir/foo
+ ;;
+ dev)
+ mknod $SCRATCH_MNT/testdir/foo c 0 0
+ ;;
+ *)
+ _fail "Invalid file type argument: $file_type"
+ esac
+ # Make sure everything done so far is durably persisted.
+ sync
+
+ # Create a file and fsync it just to create a journal/log. This file
+ # must be in the same directory as our special file "foo".
+ touch $SCRATCH_MNT/testdir/f1
+ $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/testdir/f1
+
+ # Rename our special file and then create link that has its old name.
+ mv $SCRATCH_MNT/testdir/foo $SCRATCH_MNT/testdir/bar
+ ln $SCRATCH_MNT/testdir/bar $SCRATCH_MNT/testdir/foo
+
+ # Create a second file and fsync it. This is just to durably persist the
+ # fsync journal/log which is typically modified by the previous rename
+ # and link operations. This file does not need to be placed in the same
+ # directory as our special file.
+ touch $SCRATCH_MNT/f2
+ $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/f2
+
+ # Simulate a power failure and mount the filesystem to check that
+ # replaying the fsync log/journal succeeds, that is the mount operation
+ # does not fail.
+ _flakey_drop_and_remount
+ _unmount_flakey
+ _cleanup_flakey
+}
+
+run_test symlink
+run_test fifo
+run_test dev
+
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/generic/479.out b/tests/generic/479.out
new file mode 100644
index 00000000..290f18b3
--- /dev/null
+++ b/tests/generic/479.out
@@ -0,0 +1,2 @@
+QA output created by 479
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index 1e808865..3b9b47e3 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -481,3 +481,4 @@
476 auto rw
477 auto quick exportfs
478 auto quick
+479 auto quick metadata
--
2.11.0
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