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>
92 lines
2.3 KiB
Bash
Executable File
92 lines
2.3 KiB
Bash
Executable File
#! /bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# Copyright (c) 2015 Red Hat, Inc. All Rights Reserved.
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#
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# FS QA Test 074-extsz-hints-vs-maxextlen
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#
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# Check some extent size hint boundary conditions that can result in
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# MAXEXTLEN overflows.
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#
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# In xfs_bmap_extsize_align(), we had,
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# if ((temp = (align_alen % extsz))) {
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# align_alen += extsz - temp;
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# }
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# align_alen had the value of 2097151 (i.e. MAXEXTLEN) blocks. extsz had
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# the value of 4096 blocks.
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#
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# align_alen % extsz will be 4095. so align_alen will end up having
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# 2097151 + (4096 - 4095) = 2097152 i.e. (MAXEXTLEN + 1). Thus the length
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# of the new extent will be larger than MAXEXTLEN. This will later cause
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# the bmbt leaf to have an entry whose length is set to zero block count.
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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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_cleanup()
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{
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cd /
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_destroy_loop_device $LOOP_DEV
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rm -f $tmp.* $LOOP_FILE
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}
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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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# 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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rm -f $seqres.full
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_require_test
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_require_xfs_io_command "falloc"
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# we use loop devices for this so that we can create large files for prealloc
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# without having to care about the underlying device size.
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_require_loop
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LOOP_FILE=$TEST_DIR/$seq.img
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LOOP_MNT=$TEST_DIR/$seq.mnt
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mkdir -p $LOOP_MNT
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$XFS_IO_PROG -ft -c "truncate 1t" $LOOP_FILE >> $seqres.full
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LOOP_DEV=`_create_loop_device $LOOP_FILE`
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_mkfs_dev -d size=260g,agcount=2 $LOOP_DEV
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_mount $LOOP_DEV $LOOP_MNT
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BLOCK_SIZE=$(_get_file_block_size $LOOP_MNT)
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# Corrupt the BMBT by creating extents larger than MAXEXTLEN
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# For 4k blocksize, MAXEXTLEN * 4k = 2097151 * 4k = 8589930496 = ~8GiB
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$XFS_IO_PROG -ft \
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-c "extsize $(($BLOCK_SIZE * 4096))" \
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-c "falloc 0 $(($BLOCK_SIZE * 2097152))" \
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$LOOP_MNT/foo >> $seqres.full
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umount $LOOP_MNT
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_check_xfs_filesystem $LOOP_DEV none none
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_mkfs_dev -f $LOOP_DEV
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_mount $LOOP_DEV $LOOP_MNT
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# check we trim both ends of the extent approproiately; this will fail
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# on 1k block size filesystems without the correct fixes in place.
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$XFS_IO_PROG -ft \
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-c "extsize 1g" \
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-c "falloc 1023m 2g" \
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$LOOP_MNT/foo >> $seqres.full
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umount $LOOP_MNT
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_check_xfs_filesystem $LOOP_DEV none none
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# success, all done
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echo "Silence is golden"
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status=0
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exit
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