[PATCH 14/32] reflink: test CoW behavior with IO errors

["Darrick J. Wong" <darrick.wong@oracle.com>]

Test various scenarios (with dm-flakey) where we simulate write
failures during CoW, to see if the FS can get through it without
blowing up or corrupting data.  Plumb in a FS-generic method to
sort out repairing filesystems after they get hit by IO errors.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 tests/generic/265     |   99 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/265.out |   11 +++++
 tests/generic/266     |   97 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/266.out |   11 +++++
 tests/generic/267     |  100 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/267.out |   10 +++++
 tests/generic/268     |  103 +++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/268.out |   12 ++++++
 tests/generic/271     |  100 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/271.out |   11 +++++
 tests/generic/272     |   98 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/272.out |   11 +++++
 tests/generic/276     |  101 ++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/276.out |   11 +++++
 tests/generic/278     |  104 +++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/278.out |   12 ++++++
 tests/generic/279     |  100 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/279.out |   11 +++++
 tests/generic/281     |   98 ++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/281.out |   11 +++++
 tests/generic/282     |  101 ++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/282.out |   10 +++++
 tests/generic/283     |  104 +++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/283.out |   12 ++++++
 tests/generic/group   |   12 ++++++
 25 files changed, 1350 insertions(+)
 create mode 100755 tests/generic/265
 create mode 100644 tests/generic/265.out
 create mode 100755 tests/generic/266
 create mode 100644 tests/generic/266.out
 create mode 100755 tests/generic/267
 create mode 100644 tests/generic/267.out
 create mode 100755 tests/generic/268
 create mode 100644 tests/generic/268.out
 create mode 100755 tests/generic/271
 create mode 100644 tests/generic/271.out
 create mode 100755 tests/generic/272
 create mode 100644 tests/generic/272.out
 create mode 100755 tests/generic/276
 create mode 100644 tests/generic/276.out
 create mode 100755 tests/generic/278
 create mode 100644 tests/generic/278.out
 create mode 100755 tests/generic/279
 create mode 100644 tests/generic/279.out
 create mode 100755 tests/generic/281
 create mode 100644 tests/generic/281.out
 create mode 100755 tests/generic/282
 create mode 100644 tests/generic/282.out
 create mode 100755 tests/generic/283
 create mode 100644 tests/generic/283.out


diff --git a/tests/generic/265 b/tests/generic/265
new file mode 100755
index 0000000..607867d
--- /dev/null
+++ b/tests/generic/265
@@ -0,0 +1,99 @@
+#! /bin/bash
+# FS QA Test No. 265
+#
+# Test CoW behavior when the write temporarily fails.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" -c "fdatasync" $testdir/file2 >> $seqres.full
+_dmerror_load_working_table
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/265.out b/tests/generic/265.out
new file mode 100644
index 0000000..1b67114
--- /dev/null
+++ b/tests/generic/265.out
@@ -0,0 +1,11 @@
+QA output created by 265
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-265/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-265/file2
+CoW and unmount
+fdatasync: Input/output error
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-265/file1
+Check for damage
diff --git a/tests/generic/266 b/tests/generic/266
new file mode 100755
index 0000000..102df76
--- /dev/null
+++ b/tests/generic/266
@@ -0,0 +1,97 @@
+#! /bin/bash
+# FS QA Test No. 266
+#
+# Test CoW behavior when the write permanently fails.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" -c "fdatasync" $testdir/file2 >> $seqres.full
+
+echo "Clean up the mess"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+_scratch_mount >> $seqres.full 2>&1
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/266.out b/tests/generic/266.out
new file mode 100644
index 0000000..dd34ad3
--- /dev/null
+++ b/tests/generic/266.out
@@ -0,0 +1,11 @@
+QA output created by 266
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-266/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-266/file2
+CoW and unmount
+fdatasync: Input/output error
+Clean up the mess
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-266/file1
diff --git a/tests/generic/267 b/tests/generic/267
new file mode 100755
index 0000000..24b7b7c
--- /dev/null
+++ b/tests/generic/267
@@ -0,0 +1,100 @@
+#! /bin/bash
+# FS QA Test No. 267
+#
+# Test CoW behavior when the write temporarily fails and we unmount.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full
+_dmerror_load_working_table
+rm -rf $testdir/file2 >> $seqres.full 2>&1
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/267.out b/tests/generic/267.out
new file mode 100644
index 0000000..3c58e67
--- /dev/null
+++ b/tests/generic/267.out
@@ -0,0 +1,10 @@
+QA output created by 267
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-267/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-267/file2
+CoW and unmount
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-267/file1
+Check for damage
diff --git a/tests/generic/268 b/tests/generic/268
new file mode 100755
index 0000000..c17ea57
--- /dev/null
+++ b/tests/generic/268
@@ -0,0 +1,103 @@
+#! /bin/bash
+# FS QA Test No. 268
+#
+# Test CoW behavior when the write temporarily fails but the userspace
+# program writes again.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" -c "fdatasync" $testdir/file2 >> $seqres.full
+_dmerror_load_working_table
+
+echo "Rewrite"
+$XFS_IO_PROG -f -c "pwrite -S 0x64 -b $bufsize 0 $filesize" -c "fdatasync" $testdir/file2 >> $seqres.full 2>&1
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/268.out b/tests/generic/268.out
new file mode 100644
index 0000000..234e8be
--- /dev/null
+++ b/tests/generic/268.out
@@ -0,0 +1,12 @@
+QA output created by 268
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-268/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-268/file2
+CoW and unmount
+fdatasync: Input/output error
+Rewrite
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-268/file1
+Check for damage
diff --git a/tests/generic/271 b/tests/generic/271
new file mode 100755
index 0000000..955478e
--- /dev/null
+++ b/tests/generic/271
@@ -0,0 +1,100 @@
+#! /bin/bash
+# FS QA Test No. 271
+#
+# Test DIO CoW behavior when the write temporarily fails.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+_require_odirect
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -d -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full
+_dmerror_load_working_table
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/271.out b/tests/generic/271.out
new file mode 100644
index 0000000..f7ea004
--- /dev/null
+++ b/tests/generic/271.out
@@ -0,0 +1,11 @@
+QA output created by 271
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-271/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-271/file2
+CoW and unmount
+pwrite64: Input/output error
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-271/file1
+Check for damage
diff --git a/tests/generic/272 b/tests/generic/272
new file mode 100755
index 0000000..7560214
--- /dev/null
+++ b/tests/generic/272
@@ -0,0 +1,98 @@
+#! /bin/bash
+# FS QA Test No. 272
+#
+# Test DIO CoW behavior when the write permanently fails.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+_require_odirect
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -d -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full
+
+echo "Clean up the mess"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+_scratch_mount >> $seqres.full 2>&1
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/272.out b/tests/generic/272.out
new file mode 100644
index 0000000..e21e4a8
--- /dev/null
+++ b/tests/generic/272.out
@@ -0,0 +1,11 @@
+QA output created by 272
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-272/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-272/file2
+CoW and unmount
+pwrite64: Input/output error
+Clean up the mess
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-272/file1
diff --git a/tests/generic/276 b/tests/generic/276
new file mode 100755
index 0000000..560daba
--- /dev/null
+++ b/tests/generic/276
@@ -0,0 +1,101 @@
+#! /bin/bash
+# FS QA Test No. 276
+#
+# Test DIO CoW behavior when the write temporarily fails and we unmount.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+_require_odirect
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -d -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full
+_dmerror_load_working_table
+rm -rf $testdir/file2 >> $seqres.full 2>&1
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/276.out b/tests/generic/276.out
new file mode 100644
index 0000000..e2aeacf
--- /dev/null
+++ b/tests/generic/276.out
@@ -0,0 +1,11 @@
+QA output created by 276
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-276/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-276/file2
+CoW and unmount
+pwrite64: Input/output error
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-276/file1
+Check for damage
diff --git a/tests/generic/278 b/tests/generic/278
new file mode 100755
index 0000000..6d0c828
--- /dev/null
+++ b/tests/generic/278
@@ -0,0 +1,104 @@
+#! /bin/bash
+# FS QA Test No. 278
+#
+# Test DIO CoW behavior when the write temporarily fails but the userspace
+# program writes again.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.*
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+_require_odirect
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+filesize=$((blksz * nr))
+bufnr=128
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+$XFS_IO_PROG -d -f -c "pwrite -S 0x63 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full
+_dmerror_load_working_table
+
+echo "Rewrite"
+$XFS_IO_PROG -d -f -c "pwrite -S 0x64 -b $bufsize 0 $filesize" $testdir/file2 >> $seqres.full 2>&1
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/278.out b/tests/generic/278.out
new file mode 100644
index 0000000..6723b73
--- /dev/null
+++ b/tests/generic/278.out
@@ -0,0 +1,12 @@
+QA output created by 278
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-278/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-278/file2
+CoW and unmount
+pwrite64: Input/output error
+Rewrite
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-278/file1
+Check for damage
diff --git a/tests/generic/279 b/tests/generic/279
new file mode 100755
index 0000000..67da34b
--- /dev/null
+++ b/tests/generic/279
@@ -0,0 +1,100 @@
+#! /bin/bash
+# FS QA Test No. 279
+#
+# Test mmap CoW behavior when the write temporarily fails.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.* $TEST_DIR/mwrite.out
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+urk=$($XFS_IO_PROG -f -c "mmap -rw 0 $filesize" -c "mwrite -S 0x63 0 $filesize" -c "msync -s 0 $filesize" $testdir/file2 > $TEST_DIR/mwrite.out 2>&1)
+cat $TEST_DIR/mwrite.out | tee -a $seqres.full
+_dmerror_load_working_table
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/279.out b/tests/generic/279.out
new file mode 100644
index 0000000..f34c2b2
--- /dev/null
+++ b/tests/generic/279.out
@@ -0,0 +1,11 @@
+QA output created by 279
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-279/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-279/file2
+CoW and unmount
+msync: Input/output error
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-279/file1
+Check for damage
diff --git a/tests/generic/281 b/tests/generic/281
new file mode 100755
index 0000000..71e3dd7
--- /dev/null
+++ b/tests/generic/281
@@ -0,0 +1,98 @@
+#! /bin/bash
+# FS QA Test No. 281
+#
+# Test mmap CoW behavior when the write permanently fails.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.* $TEST_DIR/mwrite.out
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+urk=$($XFS_IO_PROG -f -c "mmap -rw 0 $filesize" -c "mwrite -S 0x63 0 $filesize" -c "msync -s 0 $filesize" $testdir/file2 > $TEST_DIR/mwrite.out 2>&1)
+cat $TEST_DIR/mwrite.out | tee -a $seqres.full
+
+echo "Clean up the mess"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+_scratch_mount >> $seqres.full 2>&1
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/281.out b/tests/generic/281.out
new file mode 100644
index 0000000..a2d8e3f
--- /dev/null
+++ b/tests/generic/281.out
@@ -0,0 +1,11 @@
+QA output created by 281
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-281/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-281/file2
+CoW and unmount
+msync: Input/output error
+Clean up the mess
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-281/file1
diff --git a/tests/generic/282 b/tests/generic/282
new file mode 100755
index 0000000..38714e0
--- /dev/null
+++ b/tests/generic/282
@@ -0,0 +1,101 @@
+#! /bin/bash
+# FS QA Test No. 282
+#
+# Test mmap CoW behavior when the write temporarily fails and we unmount.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.* $TEST_DIR/mwrite.out
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+urk=$($XFS_IO_PROG -f -c "mmap -rw 0 $filesize" -c "mwrite -S 0x63 0 $filesize" $testdir/file2 > $TEST_DIR/mwrite.out 2>&1)
+cat $TEST_DIR/mwrite.out | tee -a $seqres.full
+_dmerror_load_working_table
+rm -rf $testdir/file2 >> $seqres.full 2>&1
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/282.out b/tests/generic/282.out
new file mode 100644
index 0000000..624dbfa
--- /dev/null
+++ b/tests/generic/282.out
@@ -0,0 +1,10 @@
+QA output created by 282
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-282/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-282/file2
+CoW and unmount
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-282/file1
+Check for damage
diff --git a/tests/generic/283 b/tests/generic/283
new file mode 100755
index 0000000..6d8701f
--- /dev/null
+++ b/tests/generic/283
@@ -0,0 +1,104 @@
+#! /bin/bash
+# FS QA Test No. 283
+#
+# Test mmap CoW behavior when the write temporarily fails but the userspace
+# program writes again.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016, Oracle and/or its affiliates.  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 -rf $tmp.* $TEST_DIR/mwrite.out
+    _dmerror_cleanup
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+. ./common/dmerror
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_need_to_be_root
+_require_dm_target error
+
+rm -f $seqres.full
+
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_dmerror_init
+_dmerror_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blksz=65536
+nr=640
+bufnr=128
+filesize=$((blksz * nr))
+bufsize=$((blksz * bufnr))
+
+_require_fs_space $SCRATCH_MNT $((filesize / 1024 * 3 * 5 / 4))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 -b $bufsize 0 $filesize" $testdir/file1 >> $seqres.full
+_cp_reflink $testdir/file1 $testdir/file2 >> $seqres.full
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "CoW and unmount"
+sync
+_dmerror_load_error_table
+urk=$($XFS_IO_PROG -f -c "mmap -rw 0 $filesize" -c "mwrite -S 0x63 0 $filesize" -c "msync -s 0 $filesize" $testdir/file2 > $TEST_DIR/mwrite.out 2>&1)
+cat $TEST_DIR/mwrite.out | tee -a $seqres.full
+_dmerror_load_working_table
+
+echo "Rewrite"
+$XFS_IO_PROG -f -c "mmap -rw 0 $filesize" -c "mwrite -S 0x63 0 $filesize" -c "msync 0 $filesize" $testdir/file2 >> $seqres.full 2>&1
+_dmerror_unmount
+_dmerror_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+
+echo "Check for damage"
+_dmerror_unmount
+_dmerror_cleanup
+_repair_scratch_fs >> $seqres.full
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/283.out b/tests/generic/283.out
new file mode 100644
index 0000000..f9fd5c8
--- /dev/null
+++ b/tests/generic/283.out
@@ -0,0 +1,12 @@
+QA output created by 283
+Format and mount
+Create the original files
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-283/file1
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-283/file2
+CoW and unmount
+msync: Input/output error
+Rewrite
+Compare files
+1886e67cf8783e89ce6ddc5bb09a3944  SCRATCH_MNT/test-283/file1
+Check for damage
diff --git a/tests/generic/group b/tests/generic/group
index b768882..b4a180e 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -267,13 +267,25 @@
 262 auto quick clone
 263 rw auto quick
 264 auto quick clone
+265 auto quick clone
+266 auto quick clone
+267 auto quick clone
+268 auto quick clone
 269 auto rw prealloc ioctl enospc stress
 270 auto quota rw prealloc ioctl enospc stress
+271 auto quick clone
+272 auto quick clone
 273 auto rw
 274 auto rw prealloc
 275 auto rw enospc
+276 auto quick clone
 277 auto ioctl quick metadata
+278 auto quick clone
+279 auto quick clone
 280 auto quota freeze dangerous
+281 auto quick clone
+282 auto quick clone
+283 auto quick clone
 285 auto rw
 286 auto quick other
 288 auto quick ioctl trim