From: Darrick J. Wong <darrick.wong@oracle.com>
Date: Mon, 21 Dec 2015 07:27:04 +0000 (+1100)
Subject: reflink: more CoW tests for reflink and dedupe
X-Git-Tag: v2022.05.01~2697
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=c8a13e530349c76452243b55910708a02955f57a;p=xfstests-dev.git

reflink: more CoW tests for reflink and dedupe

These tests examine the behavior of advanced and tricky copy on write
situations.

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

diff --git a/tests/generic/183 b/tests/generic/183
new file mode 100755
index 00000000..5c65e9a6
--- /dev/null
+++ b/tests/generic/183
@@ -0,0 +1,101 @@
+#! /bin/bash
+# FS QA Test No. 183
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents.
+#   - Create two files
+#   - Reflink the odd blocks of the first file into a third file.
+#   - Reflink the even blocks of the second file into the third file.
+#   - directio CoW across the halfway mark.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file2" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+seq 1 2 $NR | while read f; do
+	_reflink_range "$TESTDIR/file2" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/183.out b/tests/generic/183.out
new file mode 100644
index 00000000..e5d03225
--- /dev/null
+++ b/tests/generic/183.out
@@ -0,0 +1,15 @@
+QA output created by 183
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-183/file1
+b83f9394092e15bdcda585cd8e776dc6  SCRATCH_MNT/test-183/file2
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-183/file3
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-183/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-183/file1
+b83f9394092e15bdcda585cd8e776dc6  SCRATCH_MNT/test-183/file2
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-183/file3
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-183/file3.chk
+Check for damage
diff --git a/tests/generic/185 b/tests/generic/185
new file mode 100755
index 00000000..384c9aa6
--- /dev/null
+++ b/tests/generic/185
@@ -0,0 +1,101 @@
+#! /bin/bash
+# FS QA Test No. 185
+#
+# Ensuring that copy on write in buffered mode works when the CoW
+# range originally covers multiple extents.
+#   - Create two files
+#   - Reflink the odd blocks of the first file into a third file.
+#   - Reflink the even blocks of the second file into the third file.
+#   - CoW across the halfway mark.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file2" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+seq 1 2 $NR | while read f; do
+	_reflink_range "$TESTDIR/file2" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW across the transition"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/185.out b/tests/generic/185.out
new file mode 100644
index 00000000..e505c901
--- /dev/null
+++ b/tests/generic/185.out
@@ -0,0 +1,15 @@
+QA output created by 185
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-185/file1
+b83f9394092e15bdcda585cd8e776dc6  SCRATCH_MNT/test-185/file2
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-185/file3
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-185/file3.chk
+CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-185/file1
+b83f9394092e15bdcda585cd8e776dc6  SCRATCH_MNT/test-185/file2
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-185/file3
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-185/file3.chk
+Check for damage
diff --git a/tests/generic/186 b/tests/generic/186
new file mode 100755
index 00000000..d84166df
--- /dev/null
+++ b/tests/generic/186
@@ -0,0 +1,146 @@
+#! /bin/bash
+# FS QA Test No. 186
+#
+# Ensuring that copy on write in buffered mode works when free space
+# is heavily fragmented.
+#   - Create two files
+#   - Reflink the odd blocks of the first file into a third file.
+#   - Reflink the even blocks of the second file into the third file.
+#   - Try to fragment the free space by allocating a huge file and
+#     punching out every other block.
+#   - CoW across the halfway mark.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_require_xfs_io_command "falloc"
+_require_xfs_io_command "fpunch"
+test "$FSTYP" = "btrfs" && _notrun "Can't fragment free space on btrfs."
+
+rm -f "$seqres.full"
+
+_fragment_freesp()
+{
+	file="$1"
+
+	# consume nearly all available space (leave ~1MB)
+	avail=`_get_available_space $SCRATCH_MNT`
+	echo "$avail bytes left"
+	filesize=$((avail - 1048576))
+	$XFS_IO_PROG -fc "truncate $filesize" "$file"
+
+	chunks=20
+	chunksizemb=$((filesize / chunks / 1048576))
+	seq 1 $chunks | while read f; do
+		echo "$((f * chunksizemb)) file size $f / 20"
+		$XFS_IO_PROG -fc "falloc -k $(( (f - 1) * chunksizemb))m ${chunksizemb}m" "$file"
+	done
+
+	chunks=100
+	chunksizemb=$((filesize / chunks / 1048576))
+	seq 80 $chunks | while read f; do
+		echo "$((f * chunksizemb)) file size $f / $chunks"
+		$XFS_IO_PROG -fc "falloc -k $(( (f - 1) * chunksizemb))m ${chunksizemb}m" "$file"
+	done
+
+	filesizemb=$((filesize / 1048576))
+	$XFS_IO_PROG -fc "falloc -k 0 ${filesizemb}m" "$file"
+
+	# Try again anyway
+	avail=`_get_available_space $SCRATCH_MNT`
+	$XFS_IO_PROG -fc "pwrite -S 0x65 0 $avail" "${file}.${i}"
+
+	# Punch out whatever we need
+	seq 1 $((NR * 4)) | while read f; do
+		$XFS_IO_PROG -f -c "fpunch $((f * 2 * BLKSZ)) $BLKSZ" "$file"
+	done
+}
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=1024
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file2" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+seq 1 2 $NR | while read f; do
+	_reflink_range "$TESTDIR/file2" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+_fragment_freesp "$TESTDIR/bigfile" >> "$seqres.full" 2>&1
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW with multiple extents?"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/186.out b/tests/generic/186.out
new file mode 100644
index 00000000..adfae9c9
--- /dev/null
+++ b/tests/generic/186.out
@@ -0,0 +1,15 @@
+QA output created by 186
+Format and mount
+Create the original files
+Compare files
+6488f52f2d2351fa5ca1f6410df8684d  SCRATCH_MNT/test-186/file1
+35219c511215d00a857243965ea5ed9c  SCRATCH_MNT/test-186/file2
+8d9ea4925db533da10a45d2919d8d2d9  SCRATCH_MNT/test-186/file3
+8d9ea4925db533da10a45d2919d8d2d9  SCRATCH_MNT/test-186/file3.chk
+CoW with multiple extents?
+Compare files
+6488f52f2d2351fa5ca1f6410df8684d  SCRATCH_MNT/test-186/file1
+35219c511215d00a857243965ea5ed9c  SCRATCH_MNT/test-186/file2
+1801718b8daeb8d3ad4900bd9137b3e8  SCRATCH_MNT/test-186/file3
+1801718b8daeb8d3ad4900bd9137b3e8  SCRATCH_MNT/test-186/file3.chk
+Check for damage
diff --git a/tests/generic/187 b/tests/generic/187
new file mode 100755
index 00000000..c85a0a99
--- /dev/null
+++ b/tests/generic/187
@@ -0,0 +1,146 @@
+#! /bin/bash
+# FS QA Test No. 187
+#
+# Ensuring that copy on write in directio mode works when free space
+# is heavily fragmented.
+#   - Create two files
+#   - Reflink the odd blocks of the first file into a third file.
+#   - Reflink the even blocks of the second file into the third file.
+#   - Try to fragment the free space by allocating a huge file and
+#     punching out every other block.
+#   - CoW across the halfway mark.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_require_xfs_io_command "falloc"
+_require_xfs_io_command "fpunch"
+test "$FSTYP" = "btrfs" && _notrun "Can't fragment free space on btrfs."
+
+rm -f "$seqres.full"
+
+_fragment_freesp()
+{
+	file="$1"
+
+	# consume nearly all available space (leave ~1MB)
+	avail=`_get_available_space $SCRATCH_MNT`
+	echo "$avail bytes left"
+	filesize=$((avail - 1048576))
+	$XFS_IO_PROG -fc "truncate $filesize" "$file"
+
+	chunks=20
+	chunksizemb=$((filesize / chunks / 1048576))
+	seq 1 $chunks | while read f; do
+		echo "$((f * chunksizemb)) file size $f / 20"
+		$XFS_IO_PROG -fc "falloc -k $(( (f - 1) * chunksizemb))m ${chunksizemb}m" "$file"
+	done
+
+	chunks=100
+	chunksizemb=$((filesize / chunks / 1048576))
+	seq 80 $chunks | while read f; do
+		echo "$((f * chunksizemb)) file size $f / $chunks"
+		$XFS_IO_PROG -fc "falloc -k $(( (f - 1) * chunksizemb))m ${chunksizemb}m" "$file"
+	done
+
+	filesizemb=$((filesize / 1048576))
+	$XFS_IO_PROG -fc "falloc -k 0 ${filesizemb}m" "$file"
+
+	# Try again anyway
+	avail=`_get_available_space $SCRATCH_MNT`
+	$XFS_IO_PROG -fc "pwrite -S 0x65 0 $avail" "${file}.${i}"
+
+	# Punch out whatever we need
+	seq 1 $((NR * 4)) | while read f; do
+		$XFS_IO_PROG -f -c "fpunch $((f * 2 * BLKSZ)) $BLKSZ" "$file"
+	done
+}
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=1024
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file2" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+seq 1 2 $NR | while read f; do
+	_reflink_range "$TESTDIR/file2" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+_fragment_freesp "$TESTDIR/bigfile" >> "$seqres.full" 2>&1
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW with multiple extents?"
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/187.out b/tests/generic/187.out
new file mode 100644
index 00000000..a3c05a5a
--- /dev/null
+++ b/tests/generic/187.out
@@ -0,0 +1,15 @@
+QA output created by 187
+Format and mount
+Create the original files
+Compare files
+6488f52f2d2351fa5ca1f6410df8684d  SCRATCH_MNT/test-187/file1
+35219c511215d00a857243965ea5ed9c  SCRATCH_MNT/test-187/file2
+8d9ea4925db533da10a45d2919d8d2d9  SCRATCH_MNT/test-187/file3
+8d9ea4925db533da10a45d2919d8d2d9  SCRATCH_MNT/test-187/file3.chk
+CoW with multiple extents?
+Compare files
+6488f52f2d2351fa5ca1f6410df8684d  SCRATCH_MNT/test-187/file1
+35219c511215d00a857243965ea5ed9c  SCRATCH_MNT/test-187/file2
+1801718b8daeb8d3ad4900bd9137b3e8  SCRATCH_MNT/test-187/file3
+1801718b8daeb8d3ad4900bd9137b3e8  SCRATCH_MNT/test-187/file3.chk
+Check for damage
diff --git a/tests/generic/188 b/tests/generic/188
new file mode 100755
index 00000000..8e715ecf
--- /dev/null
+++ b/tests/generic/188
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 188
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents, some unwritten, some not.
+#   - Create a file and fallocate a second file.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - directio CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "falloc 0 $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x00 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/188.out b/tests/generic/188.out
new file mode 100644
index 00000000..135e69cc
--- /dev/null
+++ b/tests/generic/188.out
@@ -0,0 +1,13 @@
+QA output created by 188
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-188/file1
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-188/file3
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-188/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-188/file1
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-188/file3
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-188/file3.chk
+Check for damage
diff --git a/tests/generic/189 b/tests/generic/189
new file mode 100755
index 00000000..a4b984fb
--- /dev/null
+++ b/tests/generic/189
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 189
+#
+# Ensuring that copy on write in buffered mode works when the CoW
+# range originally covers multiple extents, some unwritten, some not.
+#   - Create a file and fallocate a second file.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "falloc 0 $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x00 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW across the transition"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/189.out b/tests/generic/189.out
new file mode 100644
index 00000000..ce868bd3
--- /dev/null
+++ b/tests/generic/189.out
@@ -0,0 +1,13 @@
+QA output created by 189
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-189/file1
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-189/file3
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-189/file3.chk
+CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-189/file1
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-189/file3
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-189/file3.chk
+Check for damage
diff --git a/tests/generic/190 b/tests/generic/190
new file mode 100755
index 00000000..ee53bfdd
--- /dev/null
+++ b/tests/generic/190
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 190
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents, some holes, some not.
+#   - Create a file and truncate a second file.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - directio CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x00 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/190.out b/tests/generic/190.out
new file mode 100644
index 00000000..abe5d89a
--- /dev/null
+++ b/tests/generic/190.out
@@ -0,0 +1,13 @@
+QA output created by 190
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-190/file1
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-190/file3
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-190/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-190/file1
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-190/file3
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-190/file3.chk
+Check for damage
diff --git a/tests/generic/191 b/tests/generic/191
new file mode 100755
index 00000000..6174a79a
--- /dev/null
+++ b/tests/generic/191
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 191
+#
+# Ensuring that copy on write in buffered mode works when the CoW
+# range originally covers multiple extents, some holes, some not.
+#   - Create a file and truncate a second file.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x00 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW across the transition"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/191.out b/tests/generic/191.out
new file mode 100644
index 00000000..8116eab3
--- /dev/null
+++ b/tests/generic/191.out
@@ -0,0 +1,13 @@
+QA output created by 191
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-191/file1
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-191/file3
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-191/file3.chk
+CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-191/file1
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-191/file3
+09101629908f9bdd5d178e7ce20bb1bb  SCRATCH_MNT/test-191/file3.chk
+Check for damage
diff --git a/tests/generic/194 b/tests/generic/194
new file mode 100755
index 00000000..a441aeec
--- /dev/null
+++ b/tests/generic/194
@@ -0,0 +1,101 @@
+#! /bin/bash
+# FS QA Test No. 194
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents, some delalloc, some not.
+#   - Create a file.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - Buffered write the even blocks of the second file.
+#   - directio CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x00 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+seq 1 2 $NR | while read f; do
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/194.out b/tests/generic/194.out
new file mode 100644
index 00000000..fdfda231
--- /dev/null
+++ b/tests/generic/194.out
@@ -0,0 +1,13 @@
+QA output created by 194
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-194/file1
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-194/file3
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-194/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-194/file1
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-194/file3
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-194/file3.chk
+Check for damage
diff --git a/tests/generic/195 b/tests/generic/195
new file mode 100755
index 00000000..83e7b238
--- /dev/null
+++ b/tests/generic/195
@@ -0,0 +1,101 @@
+#! /bin/bash
+# FS QA Test No. 195
+#
+# Ensuring that copy on write in buffered mode works when the CoW
+# range originally covers multiple extents, some delalloc, some not.
+#   - Create a file.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - Buffered write the even blocks of the second file.
+#   - CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x00 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW across the transition"
+seq 1 2 $NR | while read f; do
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/195.out b/tests/generic/195.out
new file mode 100644
index 00000000..94950587
--- /dev/null
+++ b/tests/generic/195.out
@@ -0,0 +1,13 @@
+QA output created by 195
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-195/file1
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-195/file3
+fa50dba51826899c372464a153cb2117  SCRATCH_MNT/test-195/file3.chk
+CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-195/file1
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-195/file3
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-195/file3.chk
+Check for damage
diff --git a/tests/generic/196 b/tests/generic/196
new file mode 100755
index 00000000..48be50c3
--- /dev/null
+++ b/tests/generic/196
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 196
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents, some unwritten, some not.
+#   - Create two files.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - directio CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/196.out b/tests/generic/196.out
new file mode 100644
index 00000000..6ee052bd
--- /dev/null
+++ b/tests/generic/196.out
@@ -0,0 +1,13 @@
+QA output created by 196
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-196/file1
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-196/file3
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-196/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-196/file1
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-196/file3
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-196/file3.chk
+Check for damage
diff --git a/tests/generic/197 b/tests/generic/197
new file mode 100755
index 00000000..9bffffee
--- /dev/null
+++ b/tests/generic/197
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 197
+#
+# Ensuring that copy on write in buffered mode works when the CoW
+# range originally covers multiple extents, some unwritten, some not.
+#   - Create two files.
+#   - Reflink the odd blocks of the first file into the second file.
+#   - CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW across the transition"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/197.out b/tests/generic/197.out
new file mode 100644
index 00000000..bec294b9
--- /dev/null
+++ b/tests/generic/197.out
@@ -0,0 +1,13 @@
+QA output created by 197
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-197/file1
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-197/file3
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-197/file3.chk
+CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-197/file1
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-197/file3
+55968a95dfc0120df4e8485576514320  SCRATCH_MNT/test-197/file3.chk
+Check for damage
diff --git a/tests/generic/199 b/tests/generic/199
new file mode 100755
index 00000000..a67c04ac
--- /dev/null
+++ b/tests/generic/199
@@ -0,0 +1,125 @@
+#! /bin/bash
+# FS QA Test No. 199
+#
+# Ensuring that copy on write in direct-io mode works when the CoW
+# range originally covers multiple extents, some unwritten, some not.
+#   - Create a file with the following repeating sequence of blocks:
+#     1. reflinked
+#     2. unwritten
+#     3. hole
+#     4. regular block
+#     5. delalloc
+#   - directio CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+_require_xfs_io_command "fpunch"
+_require_cp_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+# 0 blocks are reflinked
+seq 0 5 $NR | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+sync
+# 1 blocks are unwritten
+seq 1 5 $NR | while read f; do
+	$XFS_IO_PROG -f -c "falloc $((BLKSZ * f)) $BLKSZ" "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x00 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+sync
+# 2 blocks are holes
+seq 2 5 $NR | while read f; do
+	_pwrite_byte 0x00 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+# 3 blocks are regular
+seq 3 5 $NR | while read f; do
+	_pwrite_byte 0x71 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x71 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+sync
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+# 4 blocks are delalloc (do later)
+seq 4 5 $NR | while read f; do
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+# now cow
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/199.out b/tests/generic/199.out
new file mode 100644
index 00000000..752742db
--- /dev/null
+++ b/tests/generic/199.out
@@ -0,0 +1,13 @@
+QA output created by 199
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-199/file1
+6366fd359371414186688a0ef6988893  SCRATCH_MNT/test-199/file3
+6366fd359371414186688a0ef6988893  SCRATCH_MNT/test-199/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-199/file1
+36f6b5317a9a921fc91175390ccf7f69  SCRATCH_MNT/test-199/file3
+36f6b5317a9a921fc91175390ccf7f69  SCRATCH_MNT/test-199/file3.chk
+Check for damage
diff --git a/tests/generic/200 b/tests/generic/200
new file mode 100755
index 00000000..9ef533e2
--- /dev/null
+++ b/tests/generic/200
@@ -0,0 +1,125 @@
+#! /bin/bash
+# FS QA Test No. 200
+#
+# Ensuring that copy on write in buffered mode works when the CoW
+# range originally covers multiple extents, some unwritten, some not.
+#   - Create a file with the following repeating sequence of blocks:
+#     1. reflinked
+#     2. unwritten
+#     3. hole
+#     4. regular block
+#     5. delalloc
+#   - CoW across the halfway mark, starting with the unwritten extent.
+#   - Check that the files are now different where we say they're different.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+_require_xfs_io_command "fpunch"
+_require_cp_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+$XFS_IO_PROG -f -c "truncate $((BLKSZ * NR))" "$TESTDIR/file3" >> "$seqres.full"
+# 0 blocks are reflinked
+seq 0 5 $NR | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+sync
+# 1 blocks are unwritten
+seq 1 5 $NR | while read f; do
+	$XFS_IO_PROG -f -c "falloc $((BLKSZ * f)) $BLKSZ" "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x00 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+sync
+# 2 blocks are holes
+seq 2 5 $NR | while read f; do
+	_pwrite_byte 0x00 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+# 3 blocks are regular
+seq 3 5 $NR | while read f; do
+	_pwrite_byte 0x71 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x71 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+sync
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "directio CoW across the transition"
+# 4 blocks are delalloc (do later)
+seq 4 5 $NR | while read f; do
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+	_pwrite_byte 0x62 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+# now cow
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x63 $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2)) "$TESTDIR/file3.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/200.out b/tests/generic/200.out
new file mode 100644
index 00000000..e4ab7e0a
--- /dev/null
+++ b/tests/generic/200.out
@@ -0,0 +1,13 @@
+QA output created by 200
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-200/file1
+6366fd359371414186688a0ef6988893  SCRATCH_MNT/test-200/file3
+6366fd359371414186688a0ef6988893  SCRATCH_MNT/test-200/file3.chk
+directio CoW across the transition
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-200/file1
+36f6b5317a9a921fc91175390ccf7f69  SCRATCH_MNT/test-200/file3
+36f6b5317a9a921fc91175390ccf7f69  SCRATCH_MNT/test-200/file3.chk
+Check for damage
diff --git a/tests/generic/201 b/tests/generic/201
new file mode 100755
index 00000000..fa81b5a4
--- /dev/null
+++ b/tests/generic/201
@@ -0,0 +1,86 @@
+#! /bin/bash
+# FS QA Test No. 201
+#
+# See what happens if we dirty a lot of pages via CoW and immediately
+# unlink the file.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+NR=64
+_pwrite_byte 0x61 0 $((BLKSZ * NR)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * NR)) "$TESTDIR/file3.chk" >> "$seqres.full"
+seq 0 2 $((NR-1)) | while read f; do
+	_reflink_range "$TESTDIR/file1" $((BLKSZ * f)) "$TESTDIR/file3" $((BLKSZ * f)) $BLKSZ >> "$seqres.full"
+	_pwrite_byte 0x61 $((BLKSZ * f)) $BLKSZ "$TESTDIR/file3.chk" >> "$seqres.full"
+done
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file3.chk" | _filter_scratch
+
+echo "CoW and unmount"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 -b $((BLKSZ * NR / 2)) $((BLKSZ * NR / 4)) $((BLKSZ * NR / 2))" "$TESTDIR/file3" >> "$seqres.full"
+rm "$TESTDIR/file3"
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/201.out b/tests/generic/201.out
new file mode 100644
index 00000000..80629b67
--- /dev/null
+++ b/tests/generic/201.out
@@ -0,0 +1,9 @@
+QA output created by 201
+Format and mount
+Create the original files
+Compare files
+bdbcf02ee0aa977795a79d25fcfdccb1  SCRATCH_MNT/test-201/file1
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-201/file3
+d3959a68638c50af07f0258e032cb554  SCRATCH_MNT/test-201/file3.chk
+CoW and unmount
+Check for damage
diff --git a/tests/generic/202 b/tests/generic/202
new file mode 100755
index 00000000..2d03b553
--- /dev/null
+++ b/tests/generic/202
@@ -0,0 +1,86 @@
+#! /bin/bash
+# FS QA Test No. 202
+#
+# See what happens if we CoW across not-block-aligned EOF.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 0 $((BLKSZ + 17)) "$TESTDIR/file1" >> "$seqres.full"
+_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2"
+_pwrite_byte 0x61 0 $((BLKSZ + 17)) "$TESTDIR/file2.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file2.chk" | _filter_scratch
+
+echo "CoW and unmount"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((BLKSZ + 17)) 17" "$TESTDIR/file2" >> "$seqres.full"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 $((BLKSZ + 17)) 17" "$TESTDIR/file2.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file2.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/202.out b/tests/generic/202.out
new file mode 100644
index 00000000..8973abec
--- /dev/null
+++ b/tests/generic/202.out
@@ -0,0 +1,13 @@
+QA output created by 202
+Format and mount
+Create the original files
+Compare files
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-202/file1
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-202/file2
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-202/file2.chk
+CoW and unmount
+Compare files
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-202/file1
+7cd112044b63b2c979f45e7c1e7cc85f  SCRATCH_MNT/test-202/file2
+7cd112044b63b2c979f45e7c1e7cc85f  SCRATCH_MNT/test-202/file2.chk
+Check for damage
diff --git a/tests/generic/203 b/tests/generic/203
new file mode 100755
index 00000000..8ed765e8
--- /dev/null
+++ b/tests/generic/203
@@ -0,0 +1,86 @@
+#! /bin/bash
+# FS QA Test No. 203
+#
+# See what happens if we DIO CoW across not-block-aligned EOF.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015, 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 "$tmp".* "$TESTDIR"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+
+rm -f "$seqres.full"
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 0 $((BLKSZ + 17)) "$TESTDIR/file1" >> "$seqres.full"
+_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2"
+_pwrite_byte 0x61 0 $((BLKSZ + 17)) "$TESTDIR/file2.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file2.chk" | _filter_scratch
+
+echo "CoW and unmount"
+"$XFS_IO_PROG" -d -f -c "pwrite -S 0x63 $BLKSZ $BLKSZ" "$TESTDIR/file2" >> "$seqres.full"
+"$XFS_IO_PROG" -f -c "pwrite -S 0x63 $BLKSZ $BLKSZ" "$TESTDIR/file2.chk" >> "$seqres.full"
+_scratch_remount
+
+echo "Compare files"
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file2.chk" | _filter_scratch
+
+echo "Check for damage"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/203.out b/tests/generic/203.out
new file mode 100644
index 00000000..84ac0e87
--- /dev/null
+++ b/tests/generic/203.out
@@ -0,0 +1,13 @@
+QA output created by 203
+Format and mount
+Create the original files
+Compare files
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-203/file1
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-203/file2
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-203/file2.chk
+CoW and unmount
+Compare files
+75f550706b7d54e6ae59a8220b532285  SCRATCH_MNT/test-203/file1
+227f44bb2dcf251ebf0217edaeb1e365  SCRATCH_MNT/test-203/file2
+227f44bb2dcf251ebf0217edaeb1e365  SCRATCH_MNT/test-203/file2.chk
+Check for damage
diff --git a/tests/generic/group b/tests/generic/group
index b37d0633..ee296b41 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -185,10 +185,27 @@
 180 auto quick clone
 181 auto quick clone
 182 auto quick clone
+183 auto quick clone
 184 metadata auto quick
+185 auto quick clone
+186 auto quick clone
+187 auto quick clone
+188 auto quick clone
+189 auto quick clone
+190 auto quick clone
+191 auto quick clone
 192 atime auto
 193 metadata auto quick
+194 auto quick clone
+195 auto quick clone
+196 auto quick clone
+197 auto quick clone
 198 auto aio quick
+199 auto quick clone
+200 auto quick clone
+201 auto quick clone
+202 auto quick clone
+203 auto quick clone
 204 metadata rw auto
 207 auto aio quick
 208 auto aio