2 # FS QA Test No. btrfs/055
4 # Regression test for the btrfs ioctl clone operation when the source range
5 # contains hole(s) and the FS has the NO_HOLES feature enabled (file holes
6 # don't need file extent items in the btree to represent them).
8 # This issue is fixed by the following linux kernel btrfs patch:
10 # Btrfs: fix clone to deal with holes when NO_HOLES feature is enabled
12 #-----------------------------------------------------------------------
13 # Copyright (c) 2014 Filipe Manana. All Rights Reserved.
15 # This program is free software; you can redistribute it and/or
16 # modify it under the terms of the GNU General Public License as
17 # published by the Free Software Foundation.
19 # This program is distributed in the hope that it would be useful,
20 # but WITHOUT ANY WARRANTY; without even the implied warranty of
21 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 # GNU General Public License for more details.
24 # You should have received a copy of the GNU General Public License
25 # along with this program; if not, write the Free Software Foundation,
26 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
27 #-----------------------------------------------------------------------
31 seqres=$RESULT_DIR/$seq
32 echo "QA output created by $seq"
35 status=1 # failure is the default!
36 trap "_cleanup; exit \$status" 0 1 2 3 15
43 # get standard environment, filters and checks
47 # real QA test starts here
52 _require_btrfs_fs_feature "no_holes"
53 _require_btrfs_mkfs_feature "no-holes"
57 test_btrfs_clone_with_holes()
59 _scratch_mkfs "$1" >/dev/null 2>&1
62 BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
64 EXTENT_SIZE=$((2 * $BLOCK_SIZE))
68 # Create a file with 4 extents and 1 hole, all with 2 blocks each.
69 # The hole is in the block range [4, 5[.
70 $XFS_IO_PROG -s -f -c "pwrite -S 0x01 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \
71 $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
73 OFFSET=$(($OFFSET + $EXTENT_SIZE))
74 $XFS_IO_PROG -s -f -c "pwrite -S 0x02 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \
75 $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
77 OFFSET=$(($OFFSET + 2 * $EXTENT_SIZE))
78 $XFS_IO_PROG -s -f -c "pwrite -S 0x04 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \
79 $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
81 OFFSET=$(($OFFSET + $EXTENT_SIZE))
82 $XFS_IO_PROG -s -f -c "pwrite -S 0x05 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \
83 $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
85 # Clone destination file, 1 extent of 24 blocks.
86 EXTENT_SIZE=$((24 * $BLOCK_SIZE))
87 $XFS_IO_PROG -s -f -c "pwrite -S 0xff -b $EXTENT_SIZE 0 $EXTENT_SIZE" \
88 $SCRATCH_MNT/bar | _filter_xfs_io_blocks_modified
90 # Clone 2nd extent, 2-blocks sized hole and 3rd extent of foo into bar.
91 $CLONER_PROG -s $((2 * $BLOCK_SIZE)) -d 0 -l $((6 * $BLOCK_SIZE)) \
92 $SCRATCH_MNT/foo $SCRATCH_MNT/bar
94 # Verify both extents and the hole were cloned.
95 echo "1) Check both extents and the hole were cloned"
96 od -t x1 $SCRATCH_MNT/bar | _filter_od
98 # Cloning range starts at the middle of a hole.
99 $CLONER_PROG -s $((5 * $BLOCK_SIZE)) -d $((8 * $BLOCK_SIZE)) \
100 -l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/bar
102 # Verify that half of the hole and the following 2 block extent were cloned.
103 echo "2) Check half hole and the following 2 block extent were cloned"
104 od -t x1 $SCRATCH_MNT/bar | _filter_od
106 # Cloning range ends at the middle of a hole.
107 $CLONER_PROG -s 0 -d $((16 * $BLOCK_SIZE)) -l $((5 * $BLOCK_SIZE)) \
108 $SCRATCH_MNT/foo $SCRATCH_MNT/bar
110 # Verify that 2 extents of 2 blocks size and a 1-block hole were cloned.
111 echo "3) Check that 2 extents of 2 blocks each and a hole of 1 block were cloned"
112 od -t x1 $SCRATCH_MNT/bar | _filter_od
114 # Create a 6-block hole at the end of the source file (foo).
115 $XFS_IO_PROG -c "truncate $((16 * $BLOCK_SIZE))" $SCRATCH_MNT/foo \
116 | _filter_xfs_io_blocks_modified
119 # Now clone a range that overlaps that hole at the end of the foo file.
120 # It should clone the 10th block and the first two blocks of the hole
122 $CLONER_PROG -s $((9 * $BLOCK_SIZE)) -d $((21 * $BLOCK_SIZE)) \
123 -l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/bar
125 # Verify that the 9th block of foo and the first 2 blocks of the
126 # 6-block hole of foo were cloned into bar.
127 echo "4) Check that a block of 1 extent and 2 blocks of a hole were cloned"
128 od -t x1 $SCRATCH_MNT/bar | _filter_od
130 # Clone the same range as before, but clone it into a different offset
131 # of the target (bar) such that it increases the size of the target
133 $CLONER_PROG -s $((9 * $BLOCK_SIZE)) -d $((23 * $BLOCK_SIZE)) \
134 -l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/bar
136 # Verify that the 9th block of foo and the first 2 blocks of the 6-block
137 # hole of foo were cloned into bar at bar's 23rd block and that bar's
138 # size increased by 2 blocks.
139 echo "5) Check that a block of 1 extent and 2 blocks of a hole were" \
140 "cloned and file size increased"
141 od -t x1 $SCRATCH_MNT/bar | _filter_od
143 # Create a new completely sparse file (no extents, it's a big hole).
144 $XFS_IO_PROG -f -c "truncate $((25 * $BLOCK_SIZE))" $SCRATCH_MNT/qwerty \
145 | _filter_xfs_io_blocks_modified
148 # Test cloning a range from the sparse file to the bar file without
149 # increasing bar's size.
150 $CLONER_PROG -s $((1 * $BLOCK_SIZE)) -d 0 -l $((2 * $BLOCK_SIZE)) \
151 $SCRATCH_MNT/qwerty $SCRATCH_MNT/bar
153 # First 2 blocks of bar should now be zeroes.
154 echo "6) Check that 2 blocks of the hole were cloned"
155 od -t x1 $SCRATCH_MNT/bar | _filter_od
157 # Test cloning a range from the sparse file to the end of the bar file.
158 # The bar file currently has 26 blocks.
159 $CLONER_PROG -s 0 -d $((26 * $BLOCK_SIZE)) -l $((8 * $BLOCK_SIZE)) $SCRATCH_MNT/qwerty \
162 # Verify bar's size increased to 26 + 8 blocks, and its
163 # last 8 blocks are all zeroes.
164 echo "7) Check that 8 blocks of the hole were cloned and the file size increased"
165 od -t x1 $SCRATCH_MNT/bar | _filter_od
167 # Verify that there are no consistency errors.
171 # Regardless of the NO_HOLES feature being enabled or not, the test results
172 # should be exactly the same for both cases.
174 echo "Testing without the NO_HOLES feature"
175 # As of btrfs-progs 3.14.x, the no-holes feature isn't enabled by default.
176 # But explicitly disable it at mkfs time as it might be enabled by default
177 # in future versions.
178 test_btrfs_clone_with_holes "-O ^no-holes"
182 echo "Testing with the NO_HOLES feature enabled"
183 test_btrfs_clone_with_holes "-O no-holes"