| #! /bin/bash |
| # FS QA Test No. 325 |
| # |
| # Make some pages/extents of a file dirty, do a ranged fsync that covers |
| # only some of the dirty pages/extents, and then do a regular fsync (or |
| # another ranged fsync that covers the remaining dirty pages/extents). |
| # Verify after that all extents were persisted. |
| # |
| # This test is motivated by a btrfs issue where the first ranged fsync |
| # would prevent the following fsync from persisting the remaining dirty |
| # pages/extents. This was fixed by the following btrfs kernel patch: |
| # |
| # Btrfs: fix fsync data loss after a ranged fsync |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (C) 2014 SUSE Linux Products GmbH. All Rights Reserved. |
| # Author: Filipe Manana <fdmanana@suse.com> |
| # |
| # 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` |
| status=1 # failure is the default! |
| |
| _cleanup() |
| { |
| _cleanup_flakey |
| } |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| # 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 |
| _require_metadata_journaling $SCRATCH_DEV |
| _init_flakey |
| _mount_flakey |
| |
| # Create the file first. |
| $XFS_IO_PROG -f -c "pwrite -S 0xff 0 256K" $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| # Now sync the file data to disk using 'sync' and not an fsync. This is because |
| # in btrfs the first fsync clears the btrfs inode full fsync flag, which must |
| # be set when the first msync below happens in order to trigger the bug. |
| sync |
| |
| # Now update the first 4Kb and the last 4Kb of the file, using memory mapped IO |
| # because an msync(), since the linux kernel commit |
| # 7fc34a62ca4434a79c68e23e70ed26111b7a4cf8, invokes a ranged fsync. |
| # |
| # After those writes, msync a range covering the first 4Kb and then after |
| # perform a msync with a range covering the last 4Kb of the file. |
| # This second msync() used to be a no-op for that btrfs bug (and the first fsync |
| # didn't log the last 4Kb extent as expected too). |
| $XFS_IO_PROG \ |
| -c "mmap -w 0 256K" \ |
| -c "mwrite -S 0xaa 0 4K" \ |
| -c "mwrite -S 0xbb 252K 4K" \ |
| -c "msync -s 0K 64K" \ |
| -c "msync -s 192K 64K" \ |
| -c "munmap" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io |
| |
| echo "File content before crash/reboot:" |
| od -t x1 $SCRATCH_MNT/foo |
| |
| _flakey_drop_and_remount |
| |
| echo "File content after crash/reboot and fs mount:" |
| od -t x1 $SCRATCH_MNT/foo |
| |
| _unmount_flakey |
| |
| status=0 |
| exit |