2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2015 Oracle, Inc. All Rights Reserved.
7 # Create and populate an ext4 filesystem, corrupt an extent tree block, then
8 # see how the kernel and e2fsck deal with it.
11 seqres=$RESULT_DIR/$seq
12 echo "QA output created by $seq"
16 status=1 # failure is the default!
17 trap "_cleanup; exit \$status" 0 1 2 3 15
25 # get standard environment, filters and checks
30 # real QA test starts here
33 _require_xfs_io_command "falloc"
34 _require_xfs_io_command "fpunch"
36 test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
40 TESTDIR="${SCRATCH_MNT}/scratchdir"
41 TESTFILE="${TESTDIR}/testfile"
43 echo "+ create scratch fs"
44 _scratch_mkfs_ext4 > /dev/null 2>&1
46 echo "+ mount fs image"
48 blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
49 freeblks="$((3 * blksz / 12))"
51 echo "+ make some files"
52 $XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile" >> $seqres.full
53 seq 1 2 ${freeblks} | while read lblk; do
54 $XFS_IO_PROG -f -c "fpunch $((lblk * blksz)) ${blksz}" "${SCRATCH_MNT}/bigfile" >> $seqres.full
56 umount "${SCRATCH_MNT}"
59 e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
61 echo "+ corrupt image"
62 debugfs "${SCRATCH_DEV}" -R 'ex /bigfile' 2> /dev/null | grep '^ 0' | awk '{print $8}' | while read blk; do
63 $XFS_IO_PROG -f -c "pwrite -S 0x62 $((blk * blksz + 8)) 8" "${SCRATCH_DEV}" >> $seqres.full
70 echo moo >> "${SCRATCH_MNT}/bigfile" 2> /dev/null && _fail "extent tree should be corrupt"
71 umount "${SCRATCH_MNT}"
74 e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
76 echo "+ mount image (2)"
79 echo "+ modify files (2)"
80 $XFS_IO_PROG -f -c "pwrite ${blksz} ${blksz}" "${SCRATCH_MNT}/bigfile" >> $seqres.full
81 umount "${SCRATCH_MNT}"
84 e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"