This case tests truncate/collapse range race. If the race occurs, it
will trigger a BUG_ON(). And this kernel patch has fixed this race:
commit 23fffa925ea2c9a2bcb1a4453e2c542635aa3545
Author: Lukas Czerner <lczerner@xxxxxxxxxx>
Date: Sat Apr 12 09:56:41 2014 -0400
fs: move falloc collapse range check into the filesystem methods
Signed-off-by: Xiaoguang Wang <wangxg.fnst@xxxxxxxxxxxxxx>
Signed-off-by: Xing Gu <gux.fnst@xxxxxxxxxxxxxx>
---
tests/generic/067 | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++
tests/generic/067.out | 2 ++
tests/generic/group | 1 +
3 files changed, 78 insertions(+)
create mode 100755 tests/generic/067
create mode 100644 tests/generic/067.out
diff --git a/tests/generic/067 b/tests/generic/067
new file mode 100755
index 0000000..75d4354
--- /dev/null
+++ b/tests/generic/067
@@ -0,0 +1,75 @@
+#! /bin/bash
+# FS QA Test No. 067
+#
+# Test truncate/collapse range race.
+# And this test is also a regression test for kernel commit 23fffa9,
+# fs: move falloc collapse range check into the filesystem methods
+# If the race occurs, it will trigger a BUG_ON().
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Fujitsu. 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!
+
+_cleanup()
+{
+ rm -f $tmp.*
+}
+
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs generic
+_require_scratch
+_require_xfs_io_command "fcollapse"
+
+_scratch_mkfs > /dev/null 2>&1
+_scratch_mount
+
+testfile=$SCRATCH_MNT/file.$seq
+NCPUS=`$here/src/feature -o`
+OUTER_LOOPS=$((10 * $NCPUS * $LOAD_FACTOR))
+INNER_LOOPS=$((50 * $NCPUS * $LOAD_FACTOR))
+# fcollapse/truncate continuously and simultaneously a same file
+for ((i=1; i <= OUTER_LOOPS; i++)); do
+ for ((i=1; i <= INNER_LOOPS; i++)); do
+ $XFS_IO_PROG -f -c 'truncate 100k' \
+ -c 'fcollapse 0 16k' $testfile > /dev/null 2>&1
+ done &
+ for ((i=1; i <= INNER_LOOPS; i++)); do
+ $XFS_IO_PROG -f -c 'truncate 0' $testfile > /dev/null 2>&1
+ done &
+done
+wait
+
+_scratch_unmount
+
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/generic/067.out b/tests/generic/067.out
new file mode 100644
index 0000000..daa1545
--- /dev/null
+++ b/tests/generic/067.out
@@ -0,0 +1,2 @@
+QA output created by 067
+Silence is golden
diff --git a/tests/generic/group b/tests/generic/group
index d56d3ce..b2f0680 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -69,6 +69,7 @@
064 auto quick prealloc
065 metadata auto quick
066 metadata auto quick
+067 auto metadata stress
068 other auto freeze dangerous stress
069 rw udf auto quick
070 attr udf auto quick stress
--
1.8.2.1
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