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Qu Wenruo
04e1a5e067
Commit a514d63882c3 ("btrfs: qgroup: Commit transaction in advance
to reduce early EDQUOT") is no longer forcing transaction commit to
reclaim space, and only commits transaction asynchronously in
advance to address it.
However the criteria used in async transaction commit is not
comprehensive, thus it doesn't reclaim space automatically.
This test case will check the behavior by:
1) Falloc a large padding file
This file will take 90% of the qgroup limit
2) Sync the fs
To reflect the qgroup changes
3) Delete the file
Qgroup won't reclaim the space until transaction committed.
4) Try to write a file
If kernel not fixed, qgroup will not automatically commit transaction
to reclaim the freed space and hit EDQUOT.
This bug is going to be fixed by a patch for kernel titled:
"btrfs: qgroup: Make qgroup async transaction commit more aggressive".
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
63 lines
1.3 KiB
Bash
Executable File
63 lines
1.3 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (C) 2019 SUSE Linux Products GmbH. All Rights Reserved.
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#
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# FS QA Test 180
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#
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# Test if btrfs hits EDQUOT without reclaiming already freed extents when quota
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# is enabled.
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#
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# This bug is going to be fxied by a patch for kernel titled
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# "btrfs: qgroup: Make qgroup async transaction commit more aggressive"
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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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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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# Modify as appropriate.
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_supported_fs btrfs
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_supported_os Linux
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_require_scratch
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_require_xfs_io_command falloc
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_scratch_mkfs > /dev/null
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_scratch_mount
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$BTRFS_UTIL_PROG quota enable "$SCRATCH_MNT" > /dev/null
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$BTRFS_UTIL_PROG quota rescan -w "$SCRATCH_MNT" > /dev/null
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$BTRFS_UTIL_PROG qgroup limit -e 1G "$SCRATCH_MNT"
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$XFS_IO_PROG -f -c "falloc 0 900M" "$SCRATCH_MNT/padding"
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# Commit transaction to reflect the quota usage
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sync
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rm -f "$SCRATCH_MNT/padding"
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# Without the kernel fix, this will trigger EDQUOT.
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_pwrite_byte 0xcd 0 512M "$SCRATCH_MNT/real_file" | _filter_xfs_io
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# success, all done
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status=0
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exit
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