mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Qu Wenruo
55566e7f7c
This bug is exposed by populating a high level qgroup, and then make it childless with old qgroup numbers, and finally do rescan. Normally rescan should zero out all qgroups' accounting number, but due to a kernel bug which won't mark childless qgroups dirty, their on-disk data is never updated, thus old numbers remain and cause qgroup corruption. Fixed by the following kernel patch: "btrfs: qgroup: Dirty all qgroups before rescan" [Eryu: removed useless _filter_xfs_io] Reported-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
86 lines
2.2 KiB
Bash
Executable File
86 lines
2.2 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 171
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#
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# Test if btrfs can clear high level childless qgroup's accounting numbers
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# during rescan.
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#
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# Fixed by the following kernel patch:
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# "btrfs: qgroup: Dirty all qgroups before rescan"
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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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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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. ./common/filter.btrfs
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_scratch_mkfs > /dev/null 2>&1
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_scratch_mount
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# Populate the fs
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$BTRFS_UTIL_PROG subvolume create "$SCRATCH_MNT/subvol" > /dev/null
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_pwrite_byte 0xcdcd 0 1M "$SCRATCH_MNT/subvol/file1" > /dev/null
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# Ensure that buffered file data is persisted, so we won't have an
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# empty file in the snapshot.
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sync
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$BTRFS_UTIL_PROG subvolume snapshot "$SCRATCH_MNT/subvol" \
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"$SCRATCH_MNT/snapshot" > /dev/null
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$BTRFS_UTIL_PROG quota enable "$SCRATCH_MNT" > /dev/null
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$BTRFS_UTIL_PROG quota rescan -w "$SCRATCH_MNT" > /dev/null
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# Create high level qgroup
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$BTRFS_UTIL_PROG qgroup create 1/0 "$SCRATCH_MNT"
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$BTRFS_UTIL_PROG qgroup assign "$SCRATCH_MNT/snapshot" 1/0 "$SCRATCH_MNT" \
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2>&1 | _filter_btrfs_qgroup_assign_warnings
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# Above assignment will mark qgroup inconsistent due to the shared extents
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# between subvol/snapshot/high level qgroup, do rescan here.
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$BTRFS_UTIL_PROG quota rescan -w "$SCRATCH_MNT" > /dev/null
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# Now remove the qgroup relationship and make 1/0 childless
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# Due to the shared extent outside of 1/0, we will mark qgroup inconsistent
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# and keep the number of qgroup 1/0.
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$BTRFS_UTIL_PROG qgroup remove "$SCRATCH_MNT/snapshot" 1/0 "$SCRATCH_MNT" \
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2>&1 | _filter_btrfs_qgroup_assign_warnings
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# Above removal also marks qgroup inconsistent, rescan again
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$BTRFS_UTIL_PROG quota rescan -w "$SCRATCH_MNT" > /dev/null
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# After the test, btrfs check will verify qgroup numbers to catch any
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# corruption.
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echo "Silence is golden"
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# success, all done
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status=0
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exit
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