mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
494b07e340
In "xfs: fix fdblocks accounting w/ RMAPBT per-AG reservation", we fixed the per-ag reservation code so that we always decrease fdblocks by the reserved size because rmapbt blocks are counted as free space. The primary symptom of this bug is that if the rmapbt has expanded since mount time, the disk block counters reported via statfs will change across a remount. Therefore, we exercise this as a regression test. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Eryu Guan <guaneryu@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
65 lines
1.5 KiB
Bash
Executable File
65 lines
1.5 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2018 Oracle, Inc. All rights reserved.
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#
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# FS QA Test No. 450
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#
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# Make sure that the statfs b_avail counter doesn't change across remount
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# after the rmapbt has grown in size.
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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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_supported_os Linux
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_supported_fs xfs
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_require_test_program "punch-alternating"
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_require_xfs_scratch_rmapbt
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_scratch_mkfs >> $seqres.full
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_scratch_mount
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# Make sure we allocate a big enough file such that punching out every other
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# block will cause the rmapbt to expand by at least one block.
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blksz=$(_get_file_block_size $SCRATCH_MNT)
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nr_rmap_per_rmapbt=$(( (blksz - 56) / 24))
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blks=$(( (nr_rmap_per_rmapbt + 2) * 2))
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$XFS_IO_PROG -f -c "falloc 0 $((blks * blksz))" $SCRATCH_MNT/a >> $seqres.full
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$here/src/punch-alternating $SCRATCH_MNT/a
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# Do the stat counters change across the remount?
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before=$(stat -f -c '%b %f' $SCRATCH_MNT)
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_scratch_cycle_mount
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after=$(stat -f -c '%b %f' $SCRATCH_MNT)
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if [ "${before}" != "${after}" ]; then
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echo "counters changed: ${before} ${after}"
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echo "before: ${before}" >> $seqres.full
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echo "after: ${after}" >> $seqres.full
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fi
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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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