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https://github.com/linux-apfs/apfstests.git
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Dave Chinner
cf89aed924
Fully scripted conversion, see script in initial SPDX license commit message. Signed-off-by: Dave Chinner <dchinner@redhat.com>
70 lines
1.9 KiB
Bash
Executable File
70 lines
1.9 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2014 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test No. 033
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#
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# This test stresses indirect block reservation for delayed allocation extents.
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# XFS reserves extra blocks for deferred allocation of delalloc extents. These
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# reserved blocks can be divided among more extents than anticipated if the
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# original extent for which the blocks were reserved is split into multiple
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# delalloc extents. If this scenario repeats, eventually some extents are left
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# without any indirect block reservation whatsoever. This leads to assert
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# failures and possibly other problems in XFS.
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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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# real QA test starts here
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rm -f $seqres.full
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# Modify as appropriate.
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_supported_fs generic
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_supported_os Linux
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_require_scratch
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_require_xfs_io_command "fzero"
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_scratch_mkfs >/dev/null 2>&1
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_scratch_mount
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file=$SCRATCH_MNT/file.$seq
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bytes=$((64 * 1024))
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# create sequential delayed allocation
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$XFS_IO_PROG -f -c "pwrite 0 $bytes" $file >> $seqres.full 2>&1
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# Zero every other 4k range to split the larger delalloc extent into many more
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# smaller extents. Use zero instead of hole punch because the former does not
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# force writeback (and hence delalloc conversion). It can simply discard
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# delalloc blocks and convert the ranges to unwritten.
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endoff=$((bytes - 4096))
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for i in $(seq 0 8192 $endoff); do
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$XFS_IO_PROG -c "fzero -k $i 4k" $file >> $seqres.full 2>&1
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done
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# now zero the opposite set to remove remaining delalloc extents
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for i in $(seq 4096 8192 $endoff); do
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$XFS_IO_PROG -c "fzero -k $i 4k" $file >> $seqres.full 2>&1
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done
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_scratch_cycle_mount
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hexdump $file
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status=0
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exit
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