From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Mon, 21 Sep 2015 02:09:16 +0000 (+1000)
Subject: ext4: test block group metadata corruption checking and repair
X-Git-Tag: v2022.05.01~2813
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=e953517639c5a2957b50983498d08cffd2724d7a;p=xfstests-dev.git

ext4: test block group metadata corruption checking and repair

Targeted fuzzing tests which destroy various pieces of filesystem or
block group metadata; the tests look for (a) kernel detection of
corruption, (b) e2fsck repair of said corruption, and (c) post-repair
fs usability.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
---

diff --git a/common/rc b/common/rc
index 70d2fa87..f889103c 100644
--- a/common/rc
+++ b/common/rc
@@ -1398,6 +1398,17 @@ _require_xfs_crc()
 	umount $SCRATCH_MNT
 }
 
+# this test requires the ext4 kernel support crc feature on scratch device
+#
+_require_scratch_ext4_crc()
+{
+	_scratch_mkfs_ext4 >/dev/null 2>&1
+	dumpe2fs -h $SCRATCH_DEV 2> /dev/null | grep -q metadata_csum || _notrun "metadata_csum not supported by this filesystem"
+	_scratch_mount >/dev/null 2>&1 \
+	   || _notrun "Kernel doesn't support metadata_csum feature"
+	umount $SCRATCH_MNT
+}
+
 # this test requires the bigalloc feature to be available in mkfs.ext4
 #
 _require_ext4_mkfs_bigalloc()
diff --git a/tests/ext4/007 b/tests/ext4/007
new file mode 100755
index 00000000..5c2b9e2a
--- /dev/null
+++ b/tests/ext4/007
@@ -0,0 +1,122 @@
+#! /bin/bash
+# FS QA Test No. 007
+#
+# Create and populate an ext4 filesystem, corrupt the primary superblock, then
+# see how the kernel and e2fsck deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    #rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_supported_fs ext4
+_supported_os Linux
+
+_require_scratch
+test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
+_require_attrs
+
+rm -f $seqres.full
+TESTDIR="${SCRATCH_MNT}/scratchdir"
+TESTFILE="${TESTDIR}/testfile"
+
+echo "+ create scratch fs"
+_scratch_mkfs_ext4 > /dev/null 2>&1
+dumpe2fs -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"
+
+echo "+ mount fs image"
+_scratch_mount
+blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
+nr_groups="$(dumpe2fs -g "${SCRATCH_DEV}" 2> /dev/null | tail -n 1 | cut -d : -f 1)"
+test "${nr_groups}" -gt 0 || _notrun "scratch device not big enough for backup superblocks"
+backup_sb="$(dumpe2fs -g "${SCRATCH_DEV}" 2> /dev/null | awk -F ':' 'BEGIN {x = 0;} {if (x == 0 && int($3) > 1) {print $3; x++;}}')"
+
+echo "+ make some files"
+mkdir -p "${TESTDIR}"
+for x in `seq 1 128`; do
+	touch "${SCRATCH_MNT}/junk.${x}"
+	inode="$(stat -c '%i' "${SCRATCH_MNT}/junk.${x}")"
+	if [ "$x" -gt 64 ] && [ "$((inode % 64))" -eq 0 ]; then
+		mv "${SCRATCH_MNT}/junk.${x}" "${TESTFILE}.1"
+		break
+	fi
+done
+for x in `seq 2 64`; do
+	touch "${TESTFILE}.${x}"
+done
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+echo "+ corrupt image"
+dumpe2fs -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if ($1 == 0) {print $3}}' | while read blk; do
+	debugfs -w -R "zap_block ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "primary sb fuzz failed"
+done
+
+echo "+ mount image"
+_scratch_mount 2> /dev/null && _fail "mount should not succeed"
+
+echo "+ repair fs"
+# Have to specify backup sb and blocksize here so we don't pick up superblocks
+# scattered elsewhere on the scratch device.
+echo e2fsck -f -y -B "${blksz}" -b "${backup_sb}" "${SCRATCH_DEV}" >> $seqres.full 2>&1
+e2fsck -f -y -B "${blksz}" -b "${backup_sb}" "${SCRATCH_DEV}" >> $seqres.full 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount
+
+echo "+ chattr -R -i"
+chattr -R -f -i "${SCRATCH_MNT}/"
+
+echo "+ modify files (2)"
+broken=0
+for x in `seq 1 64`; do
+	test -e "${TESTFILE}.${x}" || continue
+	stat "${TESTFILE}.${x}" >> /dev/null 2>&1
+	test $? -ne 0 && broken=1
+	echo moo | dd oflag=append of="${TESTFILE}.${x}" 2>/dev/null
+	test $? -ne 0 && broken=1
+done
+echo "broken: ${broken}"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs (2)"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+status=0
+exit
diff --git a/tests/ext4/007.out b/tests/ext4/007.out
new file mode 100644
index 00000000..f6ce22e0
--- /dev/null
+++ b/tests/ext4/007.out
@@ -0,0 +1,13 @@
+QA output created by 007
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ repair fs
++ mount image (2)
++ chattr -R -i
++ modify files (2)
+broken: 0
++ check fs (2)
diff --git a/tests/ext4/008 b/tests/ext4/008
new file mode 100755
index 00000000..7264f372
--- /dev/null
+++ b/tests/ext4/008
@@ -0,0 +1,103 @@
+#! /bin/bash
+# FS QA Test No. 008
+#
+# Create and populate an ext4 filesystem, corrupt a group descriptor, then
+# see how the kernel and e2fsck deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    #rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_supported_fs ext4
+_supported_os Linux
+
+_require_scratch
+test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
+_require_attrs
+
+rm -f $seqres.full
+TESTDIR="${SCRATCH_MNT}/scratchdir"
+TESTFILE="${TESTDIR}/testfile"
+
+echo "+ create scratch fs"
+_scratch_mkfs_ext4 > /dev/null 2>&1
+dumpe2fs -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"
+
+echo "+ mount fs image"
+_scratch_mount
+
+echo "+ make some files"
+mkdir -p "${TESTDIR}"
+for x in `seq 1 128`; do
+	touch "${SCRATCH_MNT}/junk.${x}"
+	inode="$(stat -c '%i' "${SCRATCH_MNT}/junk.${x}")"
+	if [ "$x" -gt 64 ] && [ "$((inode % 64))" -eq 0 ]; then
+		mv "${SCRATCH_MNT}/junk.${x}" "${TESTFILE}.1"
+		break
+	fi
+done
+for x in `seq 2 64`; do
+	echo moo >> "${TESTFILE}.${x}"
+done
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+echo "+ corrupt image"
+dumpe2fs -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if (int($4) != -1) {print $4}}' | sed -e 's/-.*$//g' | awk '{if (int($1) > 0) {print $1}}' | while read blk; do
+	debugfs -w -R "zap_block ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "group descriptor fuzz failed"
+done
+
+echo "+ mount image"
+_scratch_mount 2> /dev/null && _fail "mount should not succeed"
+
+echo "+ repair fs"
+e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
+e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount
+
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs (2)"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+status=0
+exit
diff --git a/tests/ext4/008.out b/tests/ext4/008.out
new file mode 100644
index 00000000..b4e16809
--- /dev/null
+++ b/tests/ext4/008.out
@@ -0,0 +1,10 @@
+QA output created by 008
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ repair fs
++ mount image (2)
++ check fs (2)
diff --git a/tests/ext4/009 b/tests/ext4/009
new file mode 100755
index 00000000..9e4ac761
--- /dev/null
+++ b/tests/ext4/009
@@ -0,0 +1,113 @@
+#! /bin/bash
+# FS QA Test No. 009
+#
+# Create and populate an ext4 filesystem, corrupt a block bitmap, then
+# see how the kernel and e2fsck deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    #rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_supported_fs ext4
+_supported_os Linux
+
+_require_xfs_io_command "falloc"
+_require_scratch
+test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
+_require_attrs
+
+rm -f $seqres.full
+TESTDIR="${SCRATCH_MNT}/scratchdir"
+TESTFILE="${TESTDIR}/testfile"
+
+echo "+ create scratch fs"
+_scratch_mkfs_ext4 > /dev/null 2>&1
+dumpe2fs -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"
+nr_groups="$(dumpe2fs -g "${SCRATCH_DEV}" 2> /dev/null | tail -n 1 | cut -d : -f 1)"
+
+echo "+ mount fs image"
+_scratch_mount
+# abuse orlov allocator in the hopes that each bg ends up with some inodes
+for i in `seq 1 $((nr_groups * 8))`; do
+	mkdir -p "${SCRATCH_MNT}/d_${i}"
+done
+blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
+freeblks="$(stat -f -c '%a' "${SCRATCH_MNT}")"
+$XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile2" >> $seqres.full
+umount "${SCRATCH_MNT}"
+
+echo "+ make some files"
+_scratch_mount
+rm -rf "${SCRATCH_MNT}/bigfile2"
+touch "${SCRATCH_MNT}/bigfile"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+echo "+ corrupt image"
+dumpe2fs -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if (int($5) > 0) {print $5}}' | while read blk; do
+	debugfs -w -n -R "zap_block -p 0xff ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "block bitmap fuzz failed"
+done
+
+echo "+ mount image"
+_scratch_mount
+
+echo "+ modify files"
+b_bytes="$(stat -c '%B' "${SCRATCH_MNT}/bigfile")"
+$XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile" >> $seqres.full 2> /dev/null
+after="$(stat -c '%b' "${SCRATCH_MNT}/bigfile")"
+echo "$((after * b_bytes))" lt "$((blksz * freeblks / 4))" >> $seqres.full
+test "$((after * b_bytes))" -lt "$((blksz * freeblks / 4))" || _fail "falloc should fail"
+umount "${SCRATCH_MNT}"
+
+echo "+ repair fs"
+e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount
+
+echo "+ modify files (2)"
+$XFS_IO_PROG -f -c "falloc 0 $((blksz * freeblks))" "${SCRATCH_MNT}/bigfile" >> $seqres.full
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs (2)"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+status=0
+exit
diff --git a/tests/ext4/009.out b/tests/ext4/009.out
new file mode 100644
index 00000000..814a9835
--- /dev/null
+++ b/tests/ext4/009.out
@@ -0,0 +1,12 @@
+QA output created by 009
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ modify files
++ repair fs
++ mount image (2)
++ modify files (2)
++ check fs (2)
diff --git a/tests/ext4/010 b/tests/ext4/010
new file mode 100755
index 00000000..c877bd7a
--- /dev/null
+++ b/tests/ext4/010
@@ -0,0 +1,102 @@
+#! /bin/bash
+# FS QA Test No. 010
+#
+# Create and populate an ext4 filesystem, corrupt an inode bitmap, then
+# see how the kernel and e2fsck deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    #rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_supported_fs ext4
+_supported_os Linux
+
+_require_scratch
+test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
+_require_attrs
+
+rm -f $seqres.full
+TESTDIR="${SCRATCH_MNT}/scratchdir"
+TESTFILE="${TESTDIR}/testfile"
+
+echo "+ create scratch fs"
+_scratch_mkfs_ext4 > /dev/null 2>&1
+dumpe2fs -g "${SCRATCH_DEV}" > /dev/null 2>&1 || _notrun "dumpe2fs -g not supported"
+resize2fs -M "${SCRATCH_DEV}" >> $seqres.full 2>&1
+nr_groups="$(dumpe2fs -g "${SCRATCH_DEV}" 2> /dev/null | tail -n 1 | cut -d : -f 1)"
+
+echo "+ mount fs image"
+_scratch_mount
+
+echo "+ make some files"
+# abuse orlov allocator in the hopes that each bg ends up with some inodes
+for i in `seq 1 $((nr_groups * 8))`; do
+	mkdir -p "${SCRATCH_MNT}/d_${i}"
+done
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+echo "+ corrupt image"
+dumpe2fs -g "${SCRATCH_DEV}" 2>/dev/null | awk -F ':' '{if (int($6) > 0) {print $6}}' | while read blk; do
+	debugfs -w -n -R "zap_block ${blk}" "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "inode bitmap fuzz failed"
+done
+
+echo "+ mount image"
+_scratch_mount
+
+echo "+ modify files"
+touch "${SCRATCH_MNT}/file0" > /dev/null 2>&1 && _fail "touch should fail"
+umount "${SCRATCH_MNT}"
+
+echo "+ repair fs"
+e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount
+
+echo "+ modify files (2)"
+touch "${SCRATCH_MNT}/file1"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs (2)"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+status=0
+exit
diff --git a/tests/ext4/010.out b/tests/ext4/010.out
new file mode 100644
index 00000000..e8f99549
--- /dev/null
+++ b/tests/ext4/010.out
@@ -0,0 +1,12 @@
+QA output created by 010
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ modify files
++ repair fs
++ mount image (2)
++ modify files (2)
++ check fs (2)
diff --git a/tests/ext4/011 b/tests/ext4/011
new file mode 100755
index 00000000..03e4cd65
--- /dev/null
+++ b/tests/ext4/011
@@ -0,0 +1,88 @@
+#! /bin/bash
+# FS QA Test No. 011
+#
+# Create and populate an ext4 filesystem, corrupt the MMP block, then
+# see how the kernel and e2fsck deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    #rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_supported_fs ext4
+_supported_os Linux
+
+_require_scratch
+test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
+_require_attrs
+
+rm -f $seqres.full
+TESTDIR="${SCRATCH_MNT}/scratchdir"
+TESTFILE="${TESTDIR}/testfile"
+
+echo "+ create scratch fs"
+_scratch_mkfs_ext4 -O mmp -E mmp_update_interval=2 > /dev/null 2>&1
+
+echo "+ mount fs image"
+_scratch_mount
+blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
+
+echo "+ make some files"
+echo moo > "${SCRATCH_MNT}/file0"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+echo "+ corrupt image"
+blk="$(dumpe2fs "${SCRATCH_DEV}" 2> /dev/null | grep 'MMP block number' | sed -e 's/^MMP block number: *\([0-9]*\)$/\1/g')"
+$XFS_IO_PROG -f -c "pwrite -S 0x62 $((blk * blksz + 16)) 8" "${SCRATCH_DEV}" >> $seqres.full
+
+echo "+ mount image"
+_scratch_mount 2> /dev/null && _fail "mount should fail due to bad MMP"
+
+echo "+ repair fs"
+e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount || _fail "mount should not fail; MMP has been fixed"
+
+echo "+ check fs (2)"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+status=0
+exit
diff --git a/tests/ext4/011.out b/tests/ext4/011.out
new file mode 100644
index 00000000..717189eb
--- /dev/null
+++ b/tests/ext4/011.out
@@ -0,0 +1,10 @@
+QA output created by 011
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ repair fs
++ mount image (2)
++ check fs (2)
diff --git a/tests/ext4/012 b/tests/ext4/012
new file mode 100755
index 00000000..85880faf
--- /dev/null
+++ b/tests/ext4/012
@@ -0,0 +1,87 @@
+#! /bin/bash
+# FS QA Test No. 012
+#
+# Create and populate an ext4 filesystem, corrupt the journal, then
+# see how the kernel and e2fsck deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+    cd /
+    #rm -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+
+# real QA test starts here
+_supported_fs ext4
+_supported_os Linux
+
+_require_scratch
+test -n "${FORCE_FUZZ}" || _require_scratch_ext4_crc
+_require_attrs
+
+rm -f $seqres.full
+TESTDIR="${SCRATCH_MNT}/scratchdir"
+TESTFILE="${TESTDIR}/testfile"
+
+echo "+ create scratch fs"
+_scratch_mkfs_ext4 -O journal > /dev/null 2>&1
+
+echo "+ mount fs image"
+_scratch_mount
+blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
+
+echo "+ make some files"
+echo moo > "${SCRATCH_MNT}/file0"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+echo "+ corrupt image"
+debugfs -w -R 'zap -f <8> 0' "${SCRATCH_DEV}" 2> /dev/null
+
+echo "+ mount image"
+_scratch_mount 2> /dev/null && _fail "mount should fail due to bad journal"
+
+echo "+ repair fs"
+e2fsck -fy "${SCRATCH_DEV}" >> $seqres.full 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount || _fail "mount should not fail; journal has been fixed"
+
+echo "+ check fs (2)"
+e2fsck -fn "${SCRATCH_DEV}" >> $seqres.full 2>&1 || _fail "fsck should not fail"
+
+status=0
+exit
diff --git a/tests/ext4/012.out b/tests/ext4/012.out
new file mode 100644
index 00000000..61437cd6
--- /dev/null
+++ b/tests/ext4/012.out
@@ -0,0 +1,10 @@
+QA output created by 012
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ repair fs
++ mount image (2)
++ check fs (2)
diff --git a/tests/ext4/group b/tests/ext4/group
index 90ef898b..b2c01c63 100644
--- a/tests/ext4/group
+++ b/tests/ext4/group
@@ -9,6 +9,12 @@
 004 auto dump
 005 auto quick metadata ioctl rw
 006 dangerous_fuzzers
+007 fuzzers
+008 fuzzers
+009 fuzzers
+010 fuzzers
+011 fuzzers
+012 fuzzers
 271 auto rw quick
 301 aio dangerous ioctl rw stress
 302 aio dangerous ioctl rw stress