The regression is introduced to btrfs in linux v4.4 and it refuses to create
new files after log replay by returning -EEXIST.
Although the problem is on btrfs only, there is no btrfs stuff in terms of
test, so this makes it generic.
The kernel fix is
Btrfs: fix unexpected -EEXIST when creating new inode
Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
---
tests/generic/481 | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/481.out | 5 ++++
tests/generic/group | 1 +
3 files changed, 81 insertions(+)
create mode 100755 tests/generic/481
create mode 100644 tests/generic/481.out
diff --git a/tests/generic/481 b/tests/generic/481
new file mode 100755
index 0000000..8d8bb2b
--- /dev/null
+++ b/tests/generic/481
@@ -0,0 +1,75 @@
+#! /bin/bash
+# FSQA Test No. 481
+#
+# Reproduce a regression of btrfs that leads to -EEXIST on creating new files
+# after log replay.
+#
+# The kernel fix is
+# Btrfs: fix unexpected -EEXIST when creating new inode
+#
+#-----------------------------------------------------------------------
+#
+# Copyright (C) 2018 Oracle. All Rights Reserved.
+# Author: Bo Liu <bo.li.liu@xxxxxxxxxx>
+#
+# 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 $seqres.full
+
+_scratch_mkfs >>$seqres.full 2>&1
+_init_flakey
+_mount_flakey
+
+# create a file and keep it in write ahead log
+$XFS_IO_PROG -f -c "pwrite 0 4k" -c "fsync" $SCRATCH_MNT/foo | _filter_xfs_io
+
+# fail this filesystem so that remount can replay the write ahead log
+_flakey_drop_and_remount
+
+# see if we can create a new file successfully
+touch $SCRATCH_MNT/bar
+
+_unmount_flakey
+
+echo "Silence is golden"
+
+status=0
+exit
diff --git a/tests/generic/481.out b/tests/generic/481.out
new file mode 100644
index 0000000..66a6345
--- /dev/null
+++ b/tests/generic/481.out
@@ -0,0 +1,5 @@
+QA output created by 481
+wrote 4096/4096 bytes at offset 0
+XXX Bytes, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+touch: cannot touch '/mnt/scratch/bar': File exists
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index ea2056b..05f60f2 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -483,3 +483,4 @@
478 auto quick
479 auto quick metadata
480 auto quick metadata
+481 auto quick
--
2.5.0
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