mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Dave Chinner
1ff4192932
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
104 lines
3.6 KiB
Bash
Executable File
104 lines
3.6 KiB
Bash
Executable File
#! /bin/bash
|
|
# SPDX-License-Identifier: GPL-2.0
|
|
# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
|
|
#
|
|
# FS QA Test No. btrfs/097
|
|
#
|
|
# Test that an incremental send works after a file gets one of its extents
|
|
# cloned/deduplicated into lower file offsets.
|
|
#
|
|
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 $send_files_dir
|
|
rm -f $tmp.*
|
|
}
|
|
|
|
# get standard environment, filters and checks
|
|
. ./common/rc
|
|
. ./common/filter
|
|
|
|
# real QA test starts here
|
|
_supported_fs btrfs
|
|
_supported_os Linux
|
|
_require_scratch
|
|
_require_cloner
|
|
|
|
send_files_dir=$TEST_DIR/btrfs-test-$seq
|
|
|
|
rm -f $seqres.full
|
|
rm -fr $send_files_dir
|
|
mkdir $send_files_dir
|
|
|
|
_scratch_mkfs >>$seqres.full 2>&1
|
|
_scratch_mount
|
|
|
|
BLOCK_SIZE=$(_get_block_size $SCRATCH_MNT)
|
|
|
|
# Create our test file with a single extent of 16 blocks starting at a file
|
|
# offset mapped by 32nd block.
|
|
$XFS_IO_PROG -f -c "pwrite -S 0xaa $((32 * $BLOCK_SIZE)) $((16 * $BLOCK_SIZE))" \
|
|
$SCRATCH_MNT/foo | _filter_xfs_io_blocks_modified
|
|
|
|
_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
|
|
|
|
# Now clone parts of the original extent into lower offsets of the file.
|
|
#
|
|
# The first clone operation adds a file extent item to file offset 0 that points
|
|
# to our initial extent with a data offset of 4 blocks. The corresponding data back
|
|
# reference in the extent tree has a large value for the 'offset' field, which is
|
|
# the result of file_offset - data_offset = 0 - (file offset of 4th block). For
|
|
# example in case of 4k block size, it will be 0 - 16k = 18446744073709535232.
|
|
|
|
# The second clone operation adds a file extent item to file offset mapped by
|
|
# 4th block that points to our initial extent with a data offset of 12
|
|
# blocks. The corresponding data back reference in the extent tree has a large
|
|
# value for the 'offset' field, which is the result of file_offset - data_offset
|
|
# = (file offset of 4th block) - (file offset of 12th block). For example in
|
|
# case of 4k block size, it will be 16K - 48K = 18446744073709518848.
|
|
#
|
|
# Those large back reference offsets (result of unsigned arithmetic underflow)
|
|
# confused the back reference walking code (used by an incremental send and
|
|
# the multiple inspect-internal ioctls) and made it miss the back references,
|
|
# which for the case of an incremental send it made it fail with -EIO and print
|
|
# a message like the following to dmesg:
|
|
#
|
|
# "BTRFS error (device sdc): did not find backref in send_root. inode=257, \
|
|
# offset=0, disk_byte=12845056 found extent=12845056"
|
|
#
|
|
$CLONER_PROG -s $(((32 + 4) * $BLOCK_SIZE)) -d 0 -l $((4 * $BLOCK_SIZE)) \
|
|
$SCRATCH_MNT/foo $SCRATCH_MNT/foo
|
|
$CLONER_PROG -s $(((32 + 12) * $BLOCK_SIZE)) -d $((4 * $BLOCK_SIZE)) \
|
|
-l $((4 * $BLOCK_SIZE)) $SCRATCH_MNT/foo $SCRATCH_MNT/foo
|
|
|
|
_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap2
|
|
|
|
_run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
|
|
_run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
|
|
$SCRATCH_MNT/mysnap2
|
|
|
|
echo "File contents in the original filesystem:"
|
|
od -t x1 $SCRATCH_MNT/mysnap2/foo | _filter_od
|
|
|
|
# Now recreate the filesystem by receiving both send streams and verify we get
|
|
# the same file contents that the original filesystem had.
|
|
_scratch_unmount
|
|
_scratch_mkfs >>$seqres.full 2>&1
|
|
_scratch_mount
|
|
|
|
_run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT
|
|
_run_btrfs_util_prog receive -f $send_files_dir/2.snap $SCRATCH_MNT
|
|
|
|
echo "File contents in the new filesystem:"
|
|
od -t x1 $SCRATCH_MNT/mysnap2/foo | _filter_od
|
|
|
|
status=0
|
|
exit
|