| #! /bin/bash |
| # FS QA Test No. btrfs/055 |
| # |
| # Regression test for the btrfs ioctl clone operation when the source range |
| # contains hole(s) and the FS has the NO_HOLES feature enabled (file holes |
| # don't need file extent items in the btree to represent them). |
| # |
| # This issue is fixed by the following linux kernel btrfs patch: |
| # |
| # Btrfs: fix clone to deal with holes when NO_HOLES feature is enabled |
| # |
| #----------------------------------------------------------------------- |
| # 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() |
| { |
| rm -fr $tmp |
| } |
| |
| # get standard environment, filters and checks |
| . ./common/rc |
| . ./common/filter |
| |
| # 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" |
| |
| rm -f $seqres.full |
| |
| test_btrfs_clone_with_holes() |
| { |
| _scratch_mkfs "$1" >/dev/null 2>&1 |
| _scratch_mount |
| |
| BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT) |
| |
| EXTENT_SIZE=$((2 * $BLOCK_SIZE)) |
| |
| OFFSET=0 |
| |
| # Create a file with 4 extents and 1 hole, all with 2 blocks each. |
| # The hole is in the block range [4, 5[. |
| $XFS_IO_PROG -s -f -c "pwrite -S 0x01 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified |
| |
| OFFSET=$(($OFFSET + $EXTENT_SIZE)) |
| $XFS_IO_PROG -s -f -c "pwrite -S 0x02 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified |
| |
| OFFSET=$(($OFFSET + 2 * $EXTENT_SIZE)) |
| $XFS_IO_PROG -s -f -c "pwrite -S 0x04 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified |
| |
| OFFSET=$(($OFFSET + $EXTENT_SIZE)) |
| $XFS_IO_PROG -s -f -c "pwrite -S 0x05 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" \ |
| $SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified |
| |
| # Clone destination file, 1 extent of 24 blocks. |
| EXTENT_SIZE=$((24 * $BLOCK_SIZE)) |
| $XFS_IO_PROG -s -f -c "pwrite -S 0xff -b $EXTENT_SIZE 0 $EXTENT_SIZE" \ |
| $SCRATCH_MNT/bar | _filter_xfs_io_blocks_modified |
| |
| # Clone 2nd extent, 2-blocks sized hole and 3rd extent of foo into bar. |
| $CLONER_PROG -s $((2 * $BLOCK_SIZE)) -d 0 -l $((6 * $BLOCK_SIZE)) \ |
| $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| |
| # Verify both extents and the hole were cloned. |
| echo "1) Check both extents and the hole were cloned" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Cloning range starts at the middle of a hole. |
| $CLONER_PROG -s $((5 * $BLOCK_SIZE)) -d $((8 * $BLOCK_SIZE)) \ |
| -l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| |
| # Verify that half of the hole and the following 2 block extent were cloned. |
| echo "2) Check half hole and the following 2 block extent were cloned" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Cloning range ends at the middle of a hole. |
| $CLONER_PROG -s 0 -d $((16 * $BLOCK_SIZE)) -l $((5 * $BLOCK_SIZE)) \ |
| $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| |
| # Verify that 2 extents of 2 blocks size and a 1-block hole were cloned. |
| echo "3) Check that 2 extents of 2 blocks each and a hole of 1 block were cloned" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Create a 6-block hole at the end of the source file (foo). |
| $XFS_IO_PROG -c "truncate $((16 * $BLOCK_SIZE))" $SCRATCH_MNT/foo \ |
| | _filter_xfs_io_blocks_modified |
| sync |
| |
| # Now clone a range that overlaps that hole at the end of the foo file. |
| # It should clone the 10th block and the first two blocks of the hole |
| # at the end of foo. |
| $CLONER_PROG -s $((9 * $BLOCK_SIZE)) -d $((21 * $BLOCK_SIZE)) \ |
| -l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| |
| # Verify that the 9th block of foo and the first 2 blocks of the |
| # 6-block hole of foo were cloned into bar. |
| echo "4) Check that a block of 1 extent and 2 blocks of a hole were cloned" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Clone the same range as before, but clone it into a different offset |
| # of the target (bar) such that it increases the size of the target |
| # by 2 blocks. |
| $CLONER_PROG -s $((9 * $BLOCK_SIZE)) -d $((23 * $BLOCK_SIZE)) \ |
| -l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/bar |
| |
| # Verify that the 9th block of foo and the first 2 blocks of the 6-block |
| # hole of foo were cloned into bar at bar's 23rd block and that bar's |
| # size increased by 2 blocks. |
| echo "5) Check that a block of 1 extent and 2 blocks of a hole were" \ |
| "cloned and file size increased" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Create a new completely sparse file (no extents, it's a big hole). |
| $XFS_IO_PROG -f -c "truncate $((25 * $BLOCK_SIZE))" $SCRATCH_MNT/qwerty \ |
| | _filter_xfs_io_blocks_modified |
| sync |
| |
| # Test cloning a range from the sparse file to the bar file without |
| # increasing bar's size. |
| $CLONER_PROG -s $((1 * $BLOCK_SIZE)) -d 0 -l $((2 * $BLOCK_SIZE)) \ |
| $SCRATCH_MNT/qwerty $SCRATCH_MNT/bar |
| |
| # First 2 blocks of bar should now be zeroes. |
| echo "6) Check that 2 blocks of the hole were cloned" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Test cloning a range from the sparse file to the end of the bar file. |
| # The bar file currently has 26 blocks. |
| $CLONER_PROG -s 0 -d $((26 * $BLOCK_SIZE)) -l $((8 * $BLOCK_SIZE)) $SCRATCH_MNT/qwerty \ |
| $SCRATCH_MNT/bar |
| |
| # Verify bar's size increased to 26 + 8 blocks, and its |
| # last 8 blocks are all zeroes. |
| echo "7) Check that 8 blocks of the hole were cloned and the file size increased" |
| od -t x1 $SCRATCH_MNT/bar | _filter_od |
| |
| # Verify that there are no consistency errors. |
| _check_scratch_fs |
| } |
| |
| # 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_with_holes "-O ^no-holes" |
| |
| _scratch_unmount |
| |
| echo "Testing with the NO_HOLES feature enabled" |
| test_btrfs_clone_with_holes "-O no-holes" |
| |
| status=0 |
| exit |