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https://github.com/linux-apfs/apfstests.git
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Dave Chinner
1ff4192932
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
96 lines
3.2 KiB
Bash
Executable File
96 lines
3.2 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2015 SUSE Linux Products GmbH. All Rights Reserved.
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# Copyright (C) 2015 Martin Raiber <martin@urbackup.org>
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#
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# FS QA Test No. btrfs/105
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#
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# Test that an incremental send works after a file from the parent snapshot
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# gets replaced in the send snapshot by another one at the same exact location,
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# with the same name and with the same inode number.
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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 -fr $send_files_dir
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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send_files_dir=$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 single extent of 64K.
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mkdir -p $SCRATCH_MNT/foo
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$XFS_IO_PROG -f -c "pwrite -S 0xaa 0 64K" $SCRATCH_MNT/foo/bar | _filter_xfs_io
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_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT $SCRATCH_MNT/mysnap1
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_run_btrfs_util_prog subvolume snapshot $SCRATCH_MNT $SCRATCH_MNT/mysnap2
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echo "File digest before being replaced:"
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md5sum $SCRATCH_MNT/mysnap1/foo/bar | _filter_scratch
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# Remove the file and then create a new one in the same location with the same
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# name but with different content. This new file ends up getting the same inode
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# number as the previous one, because that inode number was the highest inode
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# number used by the snapshot's root and therefore when attempting to find the
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# a new inode number for the new file, we end up reusing the same inode number.
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# This happens because currently btrfs uses the highest inode number summed by 1
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# for the first inode created once a snapshot's root is loaded (done at
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# fs/btrfs/inode-map.c:btrfs_find_free_objectid in the linux kernel tree).
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# Having these two different files in the snapshots with the same inode number
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# (but different generation numbers) caused the btrfs send code to emit an
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# incorrect path for the file when issuing an unlink operation because it failed
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# to realize they were different files.
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rm -f $SCRATCH_MNT/mysnap2/foo/bar
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$XFS_IO_PROG -f -c "pwrite -S 0xbb 0 96K" \
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$SCRATCH_MNT/mysnap2/foo/bar | _filter_xfs_io
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_run_btrfs_util_prog subvolume snapshot -r $SCRATCH_MNT/mysnap2 \
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$SCRATCH_MNT/mysnap2_ro
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_run_btrfs_util_prog send -f $send_files_dir/1.snap $SCRATCH_MNT/mysnap1
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_run_btrfs_util_prog send -p $SCRATCH_MNT/mysnap1 -f $send_files_dir/2.snap \
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$SCRATCH_MNT/mysnap2_ro
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echo "File digest in the original filesystem after being replaced:"
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md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch
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# Now recreate the filesystem by receiving both send streams and verify we get
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# the same file contents that the original filesystem had.
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_scratch_unmount
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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_run_btrfs_util_prog receive -f $send_files_dir/1.snap $SCRATCH_MNT
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_run_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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# Must match the digest from the new file.
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md5sum $SCRATCH_MNT/mysnap2_ro/foo/bar | _filter_scratch
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status=0
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exit
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