mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Eryu Guan
d00a869c2e
This is a test that performs simple I/O on dm error device, which returns EIO on all I/O request. This is motivated by an ext4 bug that crashes kernel on error path when trying to update atime. Following kernel patch should fix the issue ext4: fix NULL pointer dereference in ext4_mark_inode_dirty() Signed-off-by: Eryu Guan <eguan@redhat.com> Reviewed-by: Dave Chinner <dchinner@redhat.com> Signed-off-by: Dave Chinner <david@fromorbit.com>
81 lines
2.2 KiB
Bash
Executable File
81 lines
2.2 KiB
Bash
Executable File
#! /bin/bash
|
|
# FS QA Test 338
|
|
#
|
|
# Test I/O on dm error device.
|
|
#
|
|
# Motivated by an ext4 bug that crashes kernel on error path when trying to
|
|
# update atime.
|
|
#
|
|
#-----------------------------------------------------------------------
|
|
# Copyright (c) 2016 Red Hat Inc., 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 -f $tmp.*
|
|
_dmerror_cleanup
|
|
}
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common/rc
|
|
. ./common/filter
|
|
. ./common/dmerror
|
|
|
|
# remove previous $seqres.full before test
|
|
rm -f $seqres.full
|
|
|
|
# real QA test starts here
|
|
_supported_fs generic
|
|
_supported_os Linux
|
|
_require_scratch
|
|
_require_dm_target error
|
|
# If SCRATCH_DEV is not a valid block device, FSTYP cannot be mkfs'ed either
|
|
_require_block_device $SCRATCH_DEV
|
|
|
|
echo "Silence is golden"
|
|
|
|
_scratch_mkfs >>$seqres.full 2>&1
|
|
_dmerror_init
|
|
|
|
# Use strictatime mount option here to force atime updates, which could help
|
|
# trigger the NULL pointer dereference on ext4 more easily
|
|
_dmerror_mount "-o strictatime"
|
|
_dmerror_load_error_table
|
|
|
|
# flush dmerror block device buffers and drop all caches, force reading from
|
|
# error device
|
|
blockdev --flushbufs $DMERROR_DEV
|
|
echo 3 > /proc/sys/vm/drop_caches
|
|
|
|
# do some test I/O
|
|
ls -l $SCRATCH_MNT >>$seqres.full 2>&1
|
|
$XFS_IO_PROG -fc "pwrite 0 1M" $SCRATCH_MNT/testfile >>$seqres.full 2>&1
|
|
|
|
# no panic no hang, success, all done
|
|
status=0
|
|
exit
|