mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
4acd3ddd8e
Add a couple of regression tests for "xfs: make sure the rt allocator doesn't run off the end" and "xfs: ensure that fpunch, fcollapse, and finsert operations are aligned to rt extent size". Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
103 lines
3.3 KiB
Bash
Executable File
103 lines
3.3 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Copyright (c) 2021 Oracle. All Rights Reserved.
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#
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# FS QA Test No. 146
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#
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# This is a regression test for commit 2a6ca4baed62 ("xfs: make sure the rt
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# allocator doesn't run off the end") which fixes an overflow error in the
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# _near realtime allocator. If the rt bitmap ends exactly at the end of a
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# block and the number of rt extents is large enough to allow an allocation
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# request larger than the maximum extent size, it's possible that during a
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# large allocation request, the allocator will fail to constrain maxlen on the
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# second run through the loop, and the rt bitmap range check will run right off
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# the end of the rtbitmap file. When this happens, xfs triggers a verifier
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# error and returns EFSCORRUPTED.
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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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# real QA test starts here
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_supported_fs xfs
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_require_scratch
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_require_realtime
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_require_test_program "punch-alternating"
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rm -f $seqres.full
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# Format filesystem to get the block size
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_scratch_mkfs > $seqres.full
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_scratch_mount >> $seqres.full
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blksz=$(_get_block_size $SCRATCH_MNT)
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rextsize=$($XFS_INFO_PROG $SCRATCH_MNT | grep realtime.*extsz | sed -e 's/^.*extsz=\([0-9]*\).*$/\1/g')
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rextblks=$((rextsize / blksz))
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echo "blksz $blksz rextsize $rextsize rextblks $rextblks" >> $seqres.full
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_scratch_unmount
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# Format filesystem with a realtime volume whose size fits the following:
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# 1. Longer than (XFS MAXEXTLEN * blocksize) bytes so that a large fallocate
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# request can create a maximally sized data fork extent mapping and then
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# ask the allocator for even more blocks.
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# 2. Exactly a multiple of (NBBY * blksz * rextsize) bytes.
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rtsize1=$((2097151 * blksz))
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rtsize2=$((8 * blksz * rextsize))
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rtsize=$(( $(blockdev --getsz $SCRATCH_RTDEV) * 512 ))
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echo "rtsize1 $rtsize1 rtsize2 $rtsize2 rtsize $rtsize" >> $seqres.full
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test $rtsize -gt $rtsize1 || \
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_notrun "scratch rt device too small, need $rtsize1 bytes"
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test $rtsize -gt $rtsize2 || \
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_notrun "scratch rt device too small, need $rtsize2 bytes"
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rtsize=$((rtsize - (rtsize % rtsize2)))
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echo "rt size will be $rtsize" >> $seqres.full
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_scratch_mkfs -r size=$rtsize >> $seqres.full
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_scratch_mount >> $seqres.full
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# Make sure the root directory has rtinherit set so our test file will too
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$XFS_IO_PROG -c 'chattr +t' $SCRATCH_MNT
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# Allocate some stuff at the start, to force the first falloc of the ouch file
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# to happen somewhere in the middle of the rt volume
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$XFS_IO_PROG -f -c 'falloc 0 64m' "$SCRATCH_MNT/b"
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$here/src/punch-alternating -i $((rextblks * 2)) -s $((rextblks)) "$SCRATCH_MNT/b"
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avail="$(df -P "$SCRATCH_MNT" | awk 'END {print $4}')"1
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toobig="$((avail * 2))"
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# falloc the ouch file in the middle of the rt extent to exercise the near
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# allocator in the last step.
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$XFS_IO_PROG -f -c 'falloc 0 1g' "$SCRATCH_MNT/ouch"
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# Try to get the near allocator to overflow on an allocation that matches
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# exactly one of the rtsummary size levels. This should return ENOSPC and
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# not EFSCORRUPTED.
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$XFS_IO_PROG -f -c "falloc 0 ${toobig}k" "$SCRATCH_MNT/ouch"
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# success, all done
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status=0
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exit
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