mirror of
https://github.com/linux-apfs/apfstests.git
synced 2026-05-01 15:01:44 -07:00
Darrick J. Wong
0828657542
The blocktrash fuzz tests for xfs will try to mount and write to the filesystem after corrupting it. However, the mount may not necessarily succeed, in which case we must not write junk to the root filesystem. Use the new _try_scratch_mount to guard against that. 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>
108 lines
3.2 KiB
Bash
Executable File
108 lines
3.2 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 337
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#
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# Corrupt the realtime rmapbt and see how the kernel and xfs_repair deal.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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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 -rf "$tmp".*
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}
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# get standard environment, filters and checks
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. ./common/rc
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. ./common/filter
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# real QA test starts here
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_supported_os Linux
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_supported_fs xfs
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_require_realtime
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_require_xfs_scratch_rmapbt
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_require_test_program "punch-alternating"
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_require_xfs_io_command "falloc"
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_disable_dmesg_check
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rm -f "$seqres.full"
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echo "+ create scratch fs"
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_scratch_mkfs | _filter_mkfs 2>$tmp.mkfs >/dev/null
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. $tmp.mkfs
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cat $tmp.mkfs > "$seqres.full" 2>&1
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echo "+ mount fs image"
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_scratch_mount
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blksz="$(_get_block_size $SCRATCH_MNT)"
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# inode core size is at least 176 bytes; btree header is 56 bytes;
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# rtrmap record is 32 bytes; and rtrmap key/pointer are 56 bytes.
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i_ptrs=$(( (isize - 176) / 56 ))
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bt_ptrs=$(( (blksz - 56) / 56 ))
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bt_recs=$(( (blksz - 56) / 32 ))
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blocks=$((i_ptrs * bt_ptrs * bt_recs + 1))
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_require_fs_space $SCRATCH_MNT $(( (2 * blocks * blksz) * 5 / 4096 ))
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len=$((blocks * blksz))
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echo "+ make some files"
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$XFS_IO_PROG -f -R -c "falloc 0 $len" -c "pwrite -S 0x68 -b 1048576 0 $len" $SCRATCH_MNT/f1 >> $seqres.full
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$XFS_IO_PROG -f -R -c "falloc 0 $len" -c "pwrite -S 0x68 -b 1048576 0 $len" $SCRATCH_MNT/f2 >> $seqres.full
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./src/punch-alternating $SCRATCH_MNT/f1 >> "$seqres.full"
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./src/punch-alternating $SCRATCH_MNT/f2 >> "$seqres.full"
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_scratch_unmount
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echo "+ check fs"
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_scratch_xfs_repair -n >> $seqres.full 2>&1 || echo "xfs_repair should not fail"
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echo "+ corrupt image"
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_scratch_xfs_db -x -c "sb" -c "addr rrmapino" -c "addr u3.rtrmapbt.ptrs[1]" \
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-c "stack" -c "blocktrash -x 4096 -y 4096 -n 8 -3 -z" \
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>> $seqres.full 2>&1
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echo "+ mount image"
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if _try_scratch_mount >> $seqres.full 2>&1; then
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echo "+ copy more"
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$XFS_IO_PROG -f -R -c "pwrite -S 0x68 0 1" $SCRATCH_MNT/e3 >> $seqres.full 2>&1
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test -s ${SCRATCH_MNT}/f3 && echo "should not be able to copy with busted rtrmap btree"
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_scratch_unmount
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fi
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echo "+ repair fs"
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_repair_scratch_fs >> $seqres.full 2>&1
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echo "+ mount image (2)"
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_scratch_mount
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echo "+ copy more (2)"
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$XFS_IO_PROG -f -R -c "pwrite -S 0x68 0 1" $SCRATCH_MNT/e4 >> $seqres.full
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# success, all done
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status=0
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exit
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