| #! /bin/bash |
| # FSQA Test No. 101 |
| # |
| # Test that if we truncate a file to a smaller size, then truncate it to its |
| # original size or a larger size, then fsyncing it and a power failure happens, |
| # the file will have the range [first_truncate_size, last_size[ with all bytes |
| # having a value of 0x00 if we read it the next time the filesystem is mounted. |
| # |
| # This test is motivated by a bug found in btrfs. |
| # |
| #----------------------------------------------------------------------- |
| # |
| # Copyright (C) 2015 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" |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| _cleanup_flakey |
| 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 |
| |
| # This test was motivated by an issue found in btrfs when the btrfs no-holes |
| # feature is enabled (introduced in kernel 3.14). So enable the feature if the |
| # fs being tested is btrfs. |
| if [ $FSTYP == "btrfs" ]; then |
| _require_btrfs_fs_feature "no_holes" |
| _require_btrfs_mkfs_feature "no-holes" |
| MKFS_OPTIONS="$MKFS_OPTIONS -O no-holes" |
| fi |
| |
| rm -f $seqres.full |
| |
| _scratch_mkfs >>$seqres.full 2>&1 |
| _require_metadata_journaling $SCRATCH_DEV |
| _init_flakey |
| _mount_flakey |
| |
| # Create our test files and make sure everything is durably persisted. |
| $XFS_IO_PROG -f -c "pwrite -S 0xaa 0 64K" \ |
| -c "pwrite -S 0xbb 64K 61K" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io |
| $XFS_IO_PROG -f -c "pwrite -S 0xee 0 64K" \ |
| -c "pwrite -S 0xff 64K 61K" \ |
| $SCRATCH_MNT/bar | _filter_xfs_io |
| sync |
| |
| # Now truncate our file foo to a smaller size (64Kb) and then truncate it to the |
| # size it had before the shrinking truncate (125Kb). Then fsync our file. If a |
| # power failure happens after the fsync, we expect our file to have a size of |
| # 125Kb, with the first 64Kb of data having the value 0xaa and the second 61Kb |
| # of data having the value 0x00. |
| $XFS_IO_PROG -c "truncate 64K" \ |
| -c "truncate 125K" \ |
| -c "fsync" \ |
| $SCRATCH_MNT/foo |
| |
| # Do something similar to our file bar, but the first truncation sets the file |
| # size to 0 and the second truncation expands the size to the double of what it |
| # was initially. |
| $XFS_IO_PROG -c "truncate 0" \ |
| -c "truncate 253K" \ |
| -c "fsync" \ |
| $SCRATCH_MNT/bar |
| |
| _flakey_drop_and_remount |
| |
| # We expect foo to have a size of 125Kb, the first 64Kb of data all having the |
| # value 0xaa and the remaining 61Kb to be a hole (all bytes with value 0x00). |
| echo "File foo content after log replay:" |
| od -t x1 $SCRATCH_MNT/foo |
| |
| # We expect bar to have a size of 253Kb and no extents (any byte read from bar |
| # has the value 0x00). |
| echo "File bar content after log replay:" |
| od -t x1 $SCRATCH_MNT/bar |
| |
| status=0 |
| exit |