mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Josef Bacik
6458922bb5
Test removal of a subvolume via rmdir after it has been renamed into a snapshot of the volume that originally contained the subvolume reference. This currently fails on btrfs but is fixed by the patch with the title "btrfs: fix invalid removal of root ref" Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
58 lines
1.4 KiB
Bash
Executable File
58 lines
1.4 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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#
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# FS QA Test 201
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#
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# Regression test for fix "btrfs: fix invalid removal of root ref"
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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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here=`pwd`
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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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}
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. ./common/rc
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. ./common/filter
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rm -f $seqres.full
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_supported_fs btrfs
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_supported_os Linux
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_scratch_mkfs >> $seqres.full 2>&1
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_scratch_mount
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# Create a subvol b under a and then snapshot a into c. This create's a stub
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# entry in c for b because c doesn't have a reference for b.
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#
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# But when we rename b c/foo it creates a ref for b in c. However if we go to
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# remove c/b btrfs used to depend on not finding the root ref to handle the
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# unlink properly, but we now have a ref for that root. We also had a bug that
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# would allow us to remove mis-matched refs if the keys matched, so we'd end up
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# removing too many entries which would cause a transaction abort.
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$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/a | _filter_scratch
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$BTRFS_UTIL_PROG subvolume create $SCRATCH_MNT/a/b | _filter_scratch
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$BTRFS_UTIL_PROG subvolume snapshot $SCRATCH_MNT/a $SCRATCH_MNT/c \
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| _filter_scratch
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# Need the dummy entry created so that we get the invalid removal when we rmdir
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ls $SCRATCH_MNT/c/b
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mkdir $SCRATCH_MNT/c/foo
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mv $SCRATCH_MNT/a/b $SCRATCH_MNT/c/foo
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rm -rf $SCRATCH_MNT/*
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touch $SCRATCH_MNT/blah
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status=0
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exit
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