2 # SPDX-License-Identifier: GPL-2.0
3 # Copyright (c) 2015 Oracle, Inc. All Rights Reserved.
7 # Create and populate an ext4 filesystem, corrupt the MMP block, then
8 # see how the kernel and e2fsck deal with it.
11 seqres=$RESULT_DIR/$seq
12 echo "QA output created by $seq"
16 status=1 # failure is the default!
17 trap "_cleanup; exit \$status" 0 1 2 3 15
25 # get standard environment, filters and checks
30 # real QA test starts here
34 test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
38 TESTDIR="${SCRATCH_MNT}/scratchdir"
39 TESTFILE="${TESTDIR}/testfile"
41 echo "+ create scratch fs"
42 _scratch_mkfs_ext4 -O mmp -E mmp_update_interval=2 > /dev/null 2>&1
44 echo "+ mount fs image"
46 blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
48 echo "+ make some files"
49 echo moo > "${SCRATCH_MNT}/file0"
50 umount "${SCRATCH_MNT}"
53 e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
55 echo "+ corrupt image"
56 blk="$(dumpe2fs "${SCRATCH_DEV}" 2> /dev/null | grep 'MMP block number' | sed -e 's/^MMP block number: *\([0-9]*\)$/\1/g')"
57 $XFS_IO_PROG -f -c "pwrite -S 0x62 $((blk * blksz + 16)) 8" "${SCRATCH_DEV}" >> $seqres.full
60 _try_scratch_mount 2> /dev/null && _fail "mount should fail due to bad MMP"
63 e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
65 echo "+ mount image (2)"
66 _try_scratch_mount || _fail "mount should not fail; MMP has been fixed"
69 e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"