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https://github.com/linux-apfs/apfstests.git
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Filipe Manana
df949b94f0
Test that an incremental send operation produces correct results if a file that has a prealloc (unwritten) extent beyond its EOF gets a hole punched in a section of that prealloc extent. This test is motivated by a bug found in btrfs which is fixed by a patch for the linux kernel titled: "Btrfs: send, fix incorrect file layout after hole punching beyond eof" Signed-off-by: Filipe Manana <fdmanana@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
84 lines
2.3 KiB
Bash
Executable File
84 lines
2.3 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2018 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test No. 169
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#
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# Test that an incremental send operation produces correct results if a file
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# that has a prealloc (unwritten) extent beyond its EOF gets a hole punched
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# in a section of that prealloc extent.
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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rm -fr $send_files_dir
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_test
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_require_scratch
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_require_xfs_io_command "fpunch"
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_require_xfs_io_command "falloc" "-k"
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send_files_dir=$TEST_DIR/btrfs-test-$seq
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rm -f $seqres.full
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rm -fr $send_files_dir
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mkdir $send_files_dir
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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# Create our test file with a prealloc extent of 4Mb starting at offset 0,
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# then write 1Mb of data into offset 0.
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$XFS_IO_PROG -f -c "falloc -k 0 4M" \
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-c "pwrite -S 0xea 0 1M" \
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$SCRATCH_MNT/foobar | _filter_xfs_io
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/snap1 2>&1 \
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| _filter_scratch
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$BTRFS_UTIL_PROG send -f $send_files_dir/1.snap $SCRATCH_MNT/snap1 2>&1 \
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| _filter_scratch
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# Now punch a hole starting at an offset that corresponds to the file's current
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# size (1Mb) and ends at an offset smaller then the end offset of the prealloc
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# extent we allocated earlier (3Mb < 4Mb).
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$XFS_IO_PROG -c "fpunch 1M 2M" $SCRATCH_MNT/foobar
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$BTRFS_UTIL_PROG subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/snap2 2>&1 \
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| _filter_scratch
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$BTRFS_UTIL_PROG send -p $SCRATCH_MNT/snap1 -f $send_files_dir/2.snap \
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$SCRATCH_MNT/snap2 2>&1 | _filter_scratch
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echo "File digest in the original filesystem:"
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md5sum $SCRATCH_MNT/snap2/foobar | _filter_scratch
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# Now recreate the filesystem by receiving both send streams and verify we get
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# the same file content that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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$BTRFS_UTIL_PROG receive -f $send_files_dir/1.snap $SCRATCH_MNT
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$BTRFS_UTIL_PROG receive -f $send_files_dir/2.snap $SCRATCH_MNT
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echo "File digest in the new filesystem:"
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md5sum $SCRATCH_MNT/snap2/foobar | _filter_scratch
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status=0
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exit
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