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xfstests 311: test fsync with dm flakey V3
This test sets up a dm flakey target and then runs my fsync tester I've been using to verify btrfs's fsync() is working properly. It will create a dm flakey device, mount it, run my test, make the flakey device start dropping writes, and then unmount the fs. Then we mount it back up and make sure the md5sums match and then run fsck on the device to make sure we got a consistent fs. I used the output from a run on BTRFS since it's the only one that passes this test properly. I verified each test manually to make sure they were in fact valid files. XFS and Ext4 both fail this test in one way or another. Signed-off-by: Josef Bacik <jbacik@fusionio.com> Acked-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Rich Johnston <rjohnston@sgi.com> [rjohnston@sgi.com changed syncfs() to sync() for older kernels] Signed-off-by: Rich Johnston <rjohnston@sgi.com>
This commit is contained in:
Josef Bacik
committed by
Rich Johnston
Rich Johnston
parent
120752942a
commit
2ca254dfdd
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#! /bin/bash
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# FS QA Test No. 311
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#
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# Run various fsync tests with dm flakey in freeze() mode and non freeze()
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# mode. The idea is that we do random writes and randomly fsync and verify that
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# after a fsync() followed by a freeze()+failure or just failure that the file
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# is correct. We remount the file system after the failure so that the file
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# system can do whatever cleanup it needs to and md5sum the file to make sure
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# it matches hat it was before the failure. We also fsck to make sure the file
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# system is consistent.
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#
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# The fsync tester just random writes into prealloc or not, and then fsync()s
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# randomly or sync()'s randomly and then fsync()'s before exit. There are a few
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# tests that were handcrafted to reproduce bugs in btrfs, so it's also a
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# regression test of sorts.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2013 Fusion IO. All Rights Reserved.
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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 $seq"
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here=`pwd`
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status=1 # failure is the default!
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_cleanup()
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{
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# If dmsetup load fails then we need to make sure to do resume here
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# otherwise the umount will hang
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$DMSETUP_PROG resume flakey-test > /dev/null 2>&1
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$UMOUNT_PROG $SCRATCH_MNT > /dev/null 2>&1
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$DMSETUP_PROG remove flakey-test > /dev/null 2>&1
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}
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trap "_cleanup; exit \$status" 0 1 2 3 15
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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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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_need_to_be_root
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_require_scratch
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_require_dm_flakey
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[ -x $here/src/fsync-tester ] || _notrun "fsync-tester not build"
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rm -f $seqres.full
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BLK_DEV_SIZE=`blockdev --getsz $SCRATCH_DEV`
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FLAKEY_DEV=/dev/mapper/flakey-test
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SEED=1
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testfile=$SCRATCH_MNT/$seq.fsync
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FLAKEY_TABLE="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 180 0"
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FLAKEY_TABLE_DROP="0 $BLK_DEV_SIZE flakey $SCRATCH_DEV 0 0 180 1 drop_writes"
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_TEST_OPTIONS=""
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_mount_flakey()
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{
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mount -t $FSTYP $MOUNT_OPTIONS $FLAKEY_DEV $SCRATCH_MNT
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}
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_unmount_flakey()
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{
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$UMOUNT_PROG $SCRATCH_MNT
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}
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_load_flakey_table()
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{
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# _load_flakey_table <table>
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table="$FLAKEY_TABLE"
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[ $1 -eq 1 ] && table="$FLAKEY_TABLE_DROP"
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suspend_opt=""
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[ $nolockfs -eq 1 ] && suspend_opt="--nolockfs"
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$DMSETUP_PROG suspend $suspend_opt flakey-test
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[ $? -ne 0 ] && _fatal "failed to suspend flakey-test"
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$DMSETUP_PROG load flakey-test --table "$table"
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[ $? -ne 0 ] && _fatal "failed to load table into flakey-test"
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$DMSETUP_PROG resume flakey-test
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[ $? -ne 0 ] && _fatal "failed to resumeflakey-test"
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}
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_run_test()
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{
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# _run_test <testnum> <0 - buffered | 1 - O_DIRECT>
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allow_writes=0
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drop_writes=1
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test_num=$1
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direct_opt=""
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[ $2 -eq 1 ] && direct_opt="-d"
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$here/src/fsync-tester -s $SEED -t $test_num $direct_opt $testfile
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[ $? -ne 0 ] && _fatal "fsync tester exited abnormally"
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_md5_checksum $testfile
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_load_flakey_table $drop_writes
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_unmount_flakey
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#Ok mount so that any recovery that needs to happen is done
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_load_flakey_table $allow_writes
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_mount_flakey
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_md5_checksum $testfile
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#Unmount and fsck to make sure we got a valid fs after replay
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_unmount_flakey
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_check_scratch_fs
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[ $? -ne 0 ] && _fatal "fsck failed"
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_mount_flakey
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}
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_scratch_mkfs >> $seqres.full 2>&1
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# Create a basic flakey device that will never error out
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$DMSETUP_PROG create flakey-test --table "$FLAKEY_TABLE"
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[ $? -ne 0 ] && _fatal "failed to create flakey device"
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_mount_flakey
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buffered=0
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direct=1
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for i in $(seq 1 20); do
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nolockfs=0
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SEED=$i
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echo "Running test $i buffered, normal suspend"
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_run_test $i $buffered
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echo "Running test $i direct, normal suspend"
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_run_test $i $direct
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nolockfs=1
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echo "Running test $i buffered, nolockfs"
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_run_test $i $buffered
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echo "Running test $i direct, nolockfs"
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_run_test $i $direct
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done
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status=0
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exit
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