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#! /bin/bash
# SPDX-License-Identifier: GPL-2.0
# Copyright (c) 2014 Filipe Manana. All Rights Reserved.
#
# FS QA Test No. btrfs/052
#
# Verify that the btrfs ioctl clone operation can operate on the same
# file as a source and target. That is, clone extents within the same
# file.
#
. ./common/preamble
_begin_fstest auto quick clone compress
# Override the default cleanup function.
_cleanup()
{
rm -fr $tmp
}
. ./common/filter
_supported_fs btrfs
_require_scratch
_require_cloner
test_btrfs_clone_same_file()
{
if [ -z $1 ]; then
MOUNT_OPTIONS=""
else
MOUNT_OPTIONS="-O $1"
fi
_scratch_mkfs >/dev/null 2>&1
_scratch_mount $MOUNT_OPTIONS
BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
EXTENT_SIZE=$((2 * $BLOCK_SIZE))
# Create a file with 5 extents, 4 extents of 2 blocks each and 1 extent
# of 16 blocks.
OFFSET=0
$XFS_IO_PROG -f -c "pwrite -S 0x01 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" $SCRATCH_MNT/foo \
| _filter_xfs_io_blocks_modified
sync
OFFSET=$(($OFFSET + $EXTENT_SIZE))
$XFS_IO_PROG -c "pwrite -S 0x02 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" $SCRATCH_MNT/foo \
| _filter_xfs_io_blocks_modified
sync
OFFSET=$(($OFFSET + $EXTENT_SIZE))
$XFS_IO_PROG -c "pwrite -S 0x03 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" $SCRATCH_MNT/foo \
| _filter_xfs_io_blocks_modified
sync
OFFSET=$(($OFFSET + $EXTENT_SIZE))
$XFS_IO_PROG -c "pwrite -S 0x04 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" $SCRATCH_MNT/foo \
| _filter_xfs_io_blocks_modified
sync
OFFSET=$(($OFFSET + $EXTENT_SIZE))
EXTENT_SIZE=$((16 * $BLOCK_SIZE))
$XFS_IO_PROG -c "pwrite -S 0x05 -b $EXTENT_SIZE $OFFSET $EXTENT_SIZE" $SCRATCH_MNT/foo \
| _filter_xfs_io_blocks_modified
sync
# Initial file content.
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Same source and target ranges - must fail.
$CLONER_PROG -s $((2 * $BLOCK_SIZE)) -d $((2 * $BLOCK_SIZE)) \
-l $((2 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/foo
# Check file content didn't change.
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Intersection between source and target ranges - must fail too.
# $CLONER_PROG -s 4096 -d 8192 -l 8192 $SCRATCH_MNT/foo $SCRATCH_MNT/foo
$CLONER_PROG -s $((1 * $BLOCK_SIZE)) -d $((2 * $BLOCK_SIZE)) \
-l $((2 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/foo
# Check file content didn't change.
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Clone an entire extent from a higher range to a lower range.
$CLONER_PROG -s $((6 * $BLOCK_SIZE)) -d 0 -l $((2 * $BLOCK_SIZE)) \
$SCRATCH_MNT/foo $SCRATCH_MNT/foo
# Check entire file, 0th and 1st blocks now have the same content
# as the 6th and 7th blocks.
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Clone an entire extent from a lower range to a higher range.
$CLONER_PROG -s $((2 * $BLOCK_SIZE)) -d $((4 * $BLOCK_SIZE)) \
-l $((2 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/foo
# Check entire file, 0th and 1st blocks now have the same content
# as the 6th and 7th block, and 4th and 5th blocks now has the same
# content as the 2nd and 3rd blocks.
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Now clone 1 extent and an half into the file range starting
# at 16th block So we get the second half of the extent
# starting at 4th block and the whole extent starting at 6th
# block cloned into the middle of the 16 blocks extent that
# starts at 8th block. This makes the clone ioctl process more
# extent items from the b+tree and forces a split of the large
# 16-block extent at the end of the file.
$CLONER_PROG -s $((5 * $BLOCK_SIZE)) -d $((16 * $BLOCK_SIZE)) \
-l $((3 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/foo
# Check entire file. Besides the previous changes, we now
# should have 1 block with the value 0x02 at 16th block, and 2
# blocks with value 0x04 starting at the 17th block . The
# block ranges [8, 16[ and [19, 24[ should remain with all
# bytes having the value 0x05.
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Now update 2 blocks of data at offset 0. The extent at this
# position is a clone of the extent at 6th block. Check that
# writing to this offset doesn't change data at 6th block.
$XFS_IO_PROG -c "pwrite -S 0xff -b $((2 * $BLOCK_SIZE)) 0 $((2 * $BLOCK_SIZE))" \
$SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Check that after defragmenting the file and re-mounting, the file
# content remains exactly the same as before.
_btrfs filesystem defragment $SCRATCH_MNT/foo
_scratch_cycle_mount
od -t x1 $SCRATCH_MNT/foo | _filter_od
# Verify that there are no consistency errors.
_check_scratch_fs
}
# For any of the tests below, regardless of cow/nodatacow/compression, the
# results as observed by an application/user should be exactly the same.
echo "Testing with a cow file (default)"
test_btrfs_clone_same_file
_scratch_unmount
echo "Testing with a nocow file (-O nodatacow)"
test_btrfs_clone_same_file "nodatacow"
_scratch_unmount
echo "Testing with a cow file and lzo compression"
test_btrfs_clone_same_file "compress-force=lzo"
_scratch_unmount
echo "Testing with a cow file and zlib compression"
test_btrfs_clone_same_file "compress-force=zlib"
_scratch_unmount
echo "Testing with a nocow file and lzo compression"
test_btrfs_clone_same_file "nodatacow,compress-force=lzo"
_scratch_unmount
echo "Testing with a nocow file and zlib compression"
test_btrfs_clone_same_file "nodatacow,compress-force=zlib"
status=0
exit
|
