2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2014 Filipe Manana. All Rights Reserved.
5 # FS QA Test No. btrfs/056
7 # Regression test for btrfs ioctl clone operation + fsync + log recovery.
8 # The issue was that doing an fsync after cloning into a file didn't gave any
9 # persistence guarantees as it should. What happened was that the in memory
10 # metadata (extent maps) weren't updated, which made the fsync code not able
11 # to detect that file data has been changed.
13 # This issue is fixed by the following linux kernel btrfs patch:
15 # Btrfs: make fsync work after cloning into a file
18 seqres=$RESULT_DIR/$seq
19 echo "QA output created by $seq"
22 status=1 # failure is the default!
23 trap "_cleanup; exit \$status" 0 1 2 3 15
31 # get standard environment, filters and checks
36 # real QA test starts here
40 _require_btrfs_fs_feature "no_holes"
41 _require_btrfs_mkfs_feature "no-holes"
42 _require_dm_target flakey
46 test_btrfs_clone_fsync_log_recover()
48 _scratch_mkfs "$1" >/dev/null 2>&1
50 SAVE_MOUNT_OPTIONS="$MOUNT_OPTIONS"
51 MOUNT_OPTIONS="$MOUNT_OPTIONS $2"
54 BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
56 EXTENT_SIZE=$((2 * $BLOCK_SIZE))
58 # Create a file with 4 extents and 1 hole, all with a size of
60 # The hole is in the block range [4, 5].
61 $XFS_IO_PROG -s -f -c "pwrite -S 0x01 -b $EXTENT_SIZE 0 $EXTENT_SIZE" \
62 -c "pwrite -S 0x02 -b $EXTENT_SIZE $((2 * $BLOCK_SIZE)) $EXTENT_SIZE" \
63 -c "pwrite -S 0x04 -b $EXTENT_SIZE $((6 * $BLOCK_SIZE)) $EXTENT_SIZE" \
64 -c "pwrite -S 0x05 -b $EXTENT_SIZE $((8 * $BLOCK_SIZE)) $EXTENT_SIZE" \
65 $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
67 # Clone destination file, 1 extent of 24 blocks.
68 $XFS_IO_PROG -f -c "pwrite -S 0xff -b $((24 * $BLOCK_SIZE)) 0 $((24 * $BLOCK_SIZE))" \
69 -c "fsync" $SCRATCH_MNT/bar | _filter_xfs_io_blocks_modified
71 # Clone second half of the 2nd extent, the 2 block hole, the 3rd extent
72 # and the first half of the 4th extent into file bar.
73 $CLONER_PROG -s $((3 * $BLOCK_SIZE)) -d 0 -l $((6 * $BLOCK_SIZE)) \
74 $SCRATCH_MNT/foo $SCRATCH_MNT/bar
75 $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/bar
77 # Test small files too consisting of 1 inline extent
78 EXTENT_SIZE=$(($BLOCK_SIZE - 48))
79 $XFS_IO_PROG -f -c "pwrite -S 0x00 -b $EXTENT_SIZE 0 $EXTENT_SIZE" -c "fsync" \
80 $SCRATCH_MNT/foo2 | _filter_xfs_io_blocks_modified
82 EXTENT_SIZE=$(($BLOCK_SIZE - 1048))
83 $XFS_IO_PROG -f -c "pwrite -S 0xcc -b $EXTENT_SIZE 0 $EXTENT_SIZE" -c "fsync" \
84 $SCRATCH_MNT/bar2 | _filter_xfs_io_blocks_modified
86 # Clone the entire foo2 file into bar2, overwriting all data in bar2
87 # and increasing its size.
88 EXTENT_SIZE=$(($BLOCK_SIZE - 48))
89 $CLONER_PROG -s 0 -d 0 -l $EXTENT_SIZE $SCRATCH_MNT/foo2 $SCRATCH_MNT/bar2
90 $XFS_IO_PROG -c "fsync" $SCRATCH_MNT/bar2
92 _flakey_drop_and_remount yes
94 # Verify the cloned range was persisted by fsync and the log recovery
95 # code did its work well.
96 echo "Verifying file bar content"
97 od -t x1 $SCRATCH_MNT/bar | _filter_od
99 echo "Verifying file bar2 content"
100 od -t x1 $SCRATCH_MNT/bar2 | _filter_od
104 # Verify that there are no consistency errors.
105 _check_scratch_fs $FLAKEY_DEV
108 MOUNT_OPTIONS="$SAVE_MOUNT_OPTIONS"
111 # Regardless of the NO_HOLES feature being enabled or not, the test results
112 # should be exactly the same for both cases.
114 echo "Testing without the NO_HOLES feature"
115 # As of btrfs-progs 3.14.x, the no-holes feature isn't enabled by default.
116 # But explicitly disable it at mkfs time as it might be enabled by default
117 # in future versions.
118 test_btrfs_clone_fsync_log_recover "-O ^no-holes"
120 echo "Testing without the NO_HOLES feature and compression (lzo)"
121 test_btrfs_clone_fsync_log_recover "-O ^no-holes" "-o compress-force=lzo"
123 echo "Testing with the NO_HOLES feature enabled"
124 test_btrfs_clone_fsync_log_recover "-O no-holes"
126 echo "Testing with the NO_HOLES feature enabled and compression (lzo)"
127 test_btrfs_clone_fsync_log_recover "-O no-holes" "-o compress-force=lzo"