mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
a860a167d8
fstests only supports Linux, so get rid of this unnecessary predicate. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Eryu Guan <guaneryu@gmail.com>
98 lines
2.6 KiB
Bash
Executable File
98 lines
2.6 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2017 Red Hat Inc. All Rights Reserved.
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#
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# FS QA Test 460
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#
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# Test that XFS reserves reasonable indirect blocks for delalloc and
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# speculative allocation, and doesn't cause any fdblocks corruption.
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#
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# This was inspired by an XFS but that too large 'indlen' was returned by
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# xfs_bmap_worst_indlen() which can't fit in a 17 bits value (STARTBLOCKVALBITS
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# is defined as 17), then leaked 1 << 17 blocks in sb_fdblocks.
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#
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# This was only seen on XFS with rmapbt feature enabled, but nothing prevents
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# the test from being a generic test.
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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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testfile=$SCRATCH_MNT/1G_file.$seq
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file_size=$((1024 * 1024 * 1024))
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trap "_cleanup; exit \$status" 0 1 2 3 15
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saved_dirty_background_ratio=0
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saved_dirty_ratio=0
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save_dirty_ratio()
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{
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saved_dirty_background_ratio=`cat /proc/sys/vm/dirty_background_ratio`
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saved_dirty_ratio=`cat /proc/sys/vm/dirty_ratio`
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}
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set_dirty_ratio()
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{
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echo 100 > /proc/sys/vm/dirty_background_ratio
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echo 100 > /proc/sys/vm/dirty_ratio
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}
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restore_dirty_ratio()
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{
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if [ $saved_dirty_background_ratio -ne 0 ]; then
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echo $saved_dirty_background_ratio > /proc/sys/vm/dirty_background_ratio
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fi
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if [ $saved_dirty_ratio -ne 0 ]; then
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echo $saved_dirty_ratio > /proc/sys/vm/dirty_ratio
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fi
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}
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_cleanup()
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{
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cd /
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restore_dirty_ratio
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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 $seqres.full
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# real QA test starts here
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_supported_fs generic
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# test with scratch device, because test is known to corrupt fs, we don't want
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# the corruption affect subsequent tests
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_require_scratch
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_scratch_mkfs >>$seqres.full 2>&1
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_scratch_mount
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# need at least 1G free space
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_require_fs_space $SCRATCH_MNT $((1024 * 1024))
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# To reproduce the bug, we need to keep enough dirty data in memory (1G at
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# least), so that a large enough delay allocated extent is kept in memory, then
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# speculative preallocation could allocate large number of blocks based on the
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# existing extent size.
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# So we set dirty_background_ratio and dirty_ratio to 100% uncontitionally,
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# even if the total memory is less than 1G, there's no harm to run a test on a
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# such host.
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save_dirty_ratio
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set_dirty_ratio
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# buffer write a 1G file, which is enough to trigger the bug,
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# _check_filesystems will complain about fs corruption after test
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$XFS_IO_PROG -fc "pwrite -b 1m 0 $file_size" $testfile >/dev/null 2>&1
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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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