| #! /bin/bash |
| # FS QA Test No. btrfs/056 |
| # |
| # Regression test for btrfs ioctl clone operation + fsync + log recovery. |
| # The issue was that doing an fsync after cloning into a file didn't gave any |
| # persistence guarantees as it should. What happened was that the in memory |
| # metadata (extent maps) weren't updated, which made the fsync code not able |
| # to detect that file data has been changed. |
| # |
| # This issue is fixed by the following linux kernel btrfs patch: |
| # |
| # Btrfs: make fsync work after cloning into a file |
| # |
| #----------------------------------------------------------------------- |
| # Copyright (c) 2014 Filipe Manana. 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" |
| |
| tmp=/tmp/$$ |
| status=1 # failure is the default! |
| trap "_cleanup; exit \$status" 0 1 2 3 15 |
| |
| _cleanup() |
| { |
| _cleanup_flakey |
| rm -fr $tmp |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| . ./common/dmflakey |
| |
| # real QA test starts here |
| _supported_fs btrfs |
| _supported_os Linux |
| _require_scratch |
| _require_cloner |
| _require_btrfs_fs_feature "no_holes" |
| _require_btrfs_mkfs_feature "no-holes" |
| _require_dm_target flakey |
| |
| rm -f $seqres.full |
| |
| test_btrfs_clone_fsync_log_recover() |
| { |
| _scratch_mkfs "$1" >/dev/null 2>&1 |
| _init_flakey |
| SAVE_MOUNT_OPTIONS="$MOUNT_OPTIONS" |
| MOUNT_OPTIONS="$MOUNT_OPTIONS $2" |
| _mount_flakey |
| |
| BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT) |
| |
| EXTENT_SIZE=$((2 * $BLOCK_SIZE)) |
| |
| # Create a file with 4 extents and 1 hole, all with a size of |
| # 2 blocks each. |
| # The hole is in the block range [4, 5]. |
| $XFS_IO_PROG -s -f -c "pwrite -S 0x01 -b $EXTENT_SIZE 0 $EXTENT_SIZE" \ |
| -c "pwrite -S 0x02 -b $EXTENT_SIZE $((2 * $BLOCK_SIZE)) $EXTENT_SIZE" \ |
| -c "pwrite -S 0x04 -b $EXTENT_SIZE $((6 * $BLOCK_SIZE)) $EXTENT_SIZE" \ |
| -c "pwrite -S 0x05 -b $EXTENT_SIZE $((8 * $BLOCK_SIZE)) $EXTENT_SIZE" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified |
| |
| # Clone destination file, 1 extent of 24 blocks. |
| $XFS_IO_PROG -f -c "pwrite -S 0xff -b $((24 * $BLOCK_SIZE)) 0 $((24 * $BLOCK_SIZE))" \ |
| -c "fsync" $SCRATCH_MNT/bar | _filter_xfs_io_blocks_modified |
| |
| # Clone second half of the 2nd extent, the 2 block hole, the 3rd extent |
| # and the first half of the 4th extent into file bar. |
| $CLONER_PROG -s $((3 * $BLOCK_SIZE)) -d 0 -l $((6 * $BLOCK_SIZE)) \ |
| $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/bar |
| |
| # Test small files too consisting of 1 inline extent |
| EXTENT_SIZE=$(($BLOCK_SIZE - 48)) |
| $XFS_IO_PROG -f -c "pwrite -S 0x00 -b $EXTENT_SIZE 0 $EXTENT_SIZE" -c "fsync" \ |
| $SCRATCH_MNT/foo2 | _filter_xfs_io_blocks_modified |
| |
| EXTENT_SIZE=$(($BLOCK_SIZE - 1048)) |
| $XFS_IO_PROG -f -c "pwrite -S 0xcc -b $EXTENT_SIZE 0 $EXTENT_SIZE" -c "fsync" \ |
| $SCRATCH_MNT/bar2 | _filter_xfs_io_blocks_modified |
| |
| # Clone the entire foo2 file into bar2, overwriting all data in bar2 |
| # and increasing its size. |
| EXTENT_SIZE=$(($BLOCK_SIZE - 48)) |
| $CLONER_PROG -s 0 -d 0 -l $EXTENT_SIZE $SCRATCH_MNT/foo2 $SCRATCH_MNT/bar2 |
| $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/bar2 |
| |
| _flakey_drop_and_remount yes |
| |
| # Verify the cloned range was persisted by fsync and the log recovery |
| # code did its work well. |
| echo "Verifying file bar content" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| echo "Verifying file bar2 content" |
| od -t x1 $SCRATCH_MNT/bar2 | _filter_od |
| |
| _unmount_flakey |
| |
| # Verify that there are no consistency errors. |
| _check_scratch_fs $FLAKEY_DEV |
| |
| _cleanup_flakey |
| MOUNT_OPTIONS="$SAVE_MOUNT_OPTIONS" |
| } |
| |
| # Regardless of the NO_HOLES feature being enabled or not, the test results |
| # should be exactly the same for both cases. |
| |
| echo "Testing without the NO_HOLES feature" |
| # As of btrfs-progs 3.14.x, the no-holes feature isn't enabled by default. |
| # But explicitly disable it at mkfs time as it might be enabled by default |
| # in future versions. |
| test_btrfs_clone_fsync_log_recover "-O ^no-holes" |
| |
| echo "Testing without the NO_HOLES feature and compression (lzo)" |
| test_btrfs_clone_fsync_log_recover "-O ^no-holes" "-o compress-force=lzo" |
| |
| echo "Testing with the NO_HOLES feature enabled" |
| test_btrfs_clone_fsync_log_recover "-O no-holes" |
| |
| echo "Testing with the NO_HOLES feature enabled and compression (lzo)" |
| test_btrfs_clone_fsync_log_recover "-O no-holes" "-o compress-force=lzo" |
| |
| status=0 |
| exit |