[PATCH 07/23] reflink: test intersecting CoW and falloc/fpunch/fzero/fcollapse/finsert/ftrunc

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

Ensure that we correctly handle a CoW operation immediately followed
by a truncate, falloc, fpunch, fzero, fcollapse, and finsert operation
in the middle of the CoW'd region before any flush can occur.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 tests/generic/253     |   93 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/253.out |   13 +++++++
 tests/generic/254     |   93 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/254.out |   13 +++++++
 tests/generic/259     |   93 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/259.out |   13 +++++++
 tests/generic/261     |   93 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/261.out |   13 +++++++
 tests/generic/262     |   96 +++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/262.out |   13 +++++++
 tests/generic/264     |   93 +++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/264.out |   13 +++++++
 tests/generic/group   |    6 +++
 13 files changed, 645 insertions(+)
 create mode 100755 tests/generic/253
 create mode 100644 tests/generic/253.out
 create mode 100755 tests/generic/254
 create mode 100644 tests/generic/254.out
 create mode 100755 tests/generic/259
 create mode 100644 tests/generic/259.out
 create mode 100755 tests/generic/261
 create mode 100644 tests/generic/261.out
 create mode 100755 tests/generic/262
 create mode 100644 tests/generic/262.out
 create mode 100755 tests/generic/264
 create mode 100644 tests/generic/264.out


diff --git a/tests/generic/253 b/tests/generic/253
new file mode 100755
index 0000000..d8e0840
--- /dev/null
+++ b/tests/generic/253
@@ -0,0 +1,93 @@
+#! /bin/bash
+# FS QA Test No. 253
+#
+# Truncate a file at midway through a CoW region.
+#
+# This test is dependent on the system page size, so we cannot use md5 in
+# the golden output; we can only compare to a check file.
+#
+#-----------------------------------------------------------------------
+# 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".*
+}
+
+# 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 "truncate"
+
+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
+
+blksz=65536
+nr=4
+
+echo "Create the original files"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$testdir/file1" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$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 0x62 -b $((blksz * 2)) $blksz $((blksz * 2))" -c "truncate $((blksz * 2))" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+"$XFS_IO_PROG" -f -c "pwrite -S 0x62 -b $((blksz * 2)) $blksz $((blksz * 2))" -c "truncate $((blksz * 2))" "$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"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/253.out b/tests/generic/253.out
new file mode 100644
index 0000000..f7c07a0
--- /dev/null
+++ b/tests/generic/253.out
@@ -0,0 +1,13 @@
+QA output created by 253
+Format and mount
+Create the original files
+Compare files
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-253/file1
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-253/file2
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-253/file2.chk
+CoW and unmount
+Compare files
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-253/file1
+b5fc98f04b19fa7b2085ec1358c78760  SCRATCH_MNT/test-253/file2
+b5fc98f04b19fa7b2085ec1358c78760  SCRATCH_MNT/test-253/file2.chk
+Check for damage
diff --git a/tests/generic/254 b/tests/generic/254
new file mode 100755
index 0000000..c66b2f4
--- /dev/null
+++ b/tests/generic/254
@@ -0,0 +1,93 @@
+#! /bin/bash
+# FS QA Test No. 254
+#
+# Punch a file at midway through a CoW region.
+#
+# This test is dependent on the system page size, so we cannot use md5 in
+# the golden output; we can only compare to a check file.
+#
+#-----------------------------------------------------------------------
+# 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 "$tmp".*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_require_xfs_io_command "fpunch"
+
+rm -f "$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
+
+blksz=65536
+nr=5
+
+echo "Create the original files"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$testdir/file1" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$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 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" -c "fpunch $((blksz * 2)) $blksz" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+"$XFS_IO_PROG" -f -c "pwrite -S 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" -c "pwrite -S 0x00 $((blksz * 2)) $blksz" "$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"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/254.out b/tests/generic/254.out
new file mode 100644
index 0000000..00d2121
--- /dev/null
+++ b/tests/generic/254.out
@@ -0,0 +1,13 @@
+QA output created by 254
+Format and mount
+Create the original files
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-254/file1
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-254/file2
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-254/file2.chk
+CoW and unmount
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-254/file1
+b9f7a56c2ab90569cb19d8597583c6a6  SCRATCH_MNT/test-254/file2
+b9f7a56c2ab90569cb19d8597583c6a6  SCRATCH_MNT/test-254/file2.chk
+Check for damage
diff --git a/tests/generic/259 b/tests/generic/259
new file mode 100755
index 0000000..3307144
--- /dev/null
+++ b/tests/generic/259
@@ -0,0 +1,93 @@
+#! /bin/bash
+# FS QA Test No. 259
+#
+# fzero a file at midway through a CoW region.
+#
+# This test is dependent on the system page size, so we cannot use md5 in
+# the golden output; we can only compare to a check file.
+#
+#-----------------------------------------------------------------------
+# 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".*
+}
+
+# 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 "fzero"
+
+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
+
+blksz=65536
+nr=5
+
+echo "Create the original files"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$testdir/file1" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$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 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" -c "fzero $((blksz * 2)) $blksz" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+"$XFS_IO_PROG" -f -c "pwrite -S 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" -c "pwrite -S 0x00 $((blksz * 2)) $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"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/259.out b/tests/generic/259.out
new file mode 100644
index 0000000..ebe1020
--- /dev/null
+++ b/tests/generic/259.out
@@ -0,0 +1,13 @@
+QA output created by 259
+Format and mount
+Create the original files
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-259/file1
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-259/file2
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-259/file2.chk
+CoW and unmount
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-259/file1
+b9f7a56c2ab90569cb19d8597583c6a6  SCRATCH_MNT/test-259/file2
+b9f7a56c2ab90569cb19d8597583c6a6  SCRATCH_MNT/test-259/file2.chk
+Check for damage
diff --git a/tests/generic/261 b/tests/generic/261
new file mode 100755
index 0000000..3027a63
--- /dev/null
+++ b/tests/generic/261
@@ -0,0 +1,93 @@
+#! /bin/bash
+# FS QA Test No. 261
+#
+# fcollapse a file at midway through a CoW region.
+#
+# This test is dependent on the system page size, so we cannot use md5 in
+# the golden output; we can only compare to a check file.
+#
+#-----------------------------------------------------------------------
+# 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 "$tmp".*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_require_xfs_io_command "fcollapse"
+
+rm -f "$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
+
+blksz=65536
+nr=5
+
+echo "Create the original files"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$testdir/file1" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$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 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" -c "fcollapse $((blksz * 2)) $blksz" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+"$XFS_IO_PROG" -f -c "pwrite -S 0x62 -b $((blksz * 2)) $blksz $((blksz * 2))" -c "truncate $((blksz * (nr - 1)))" "$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"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/261.out b/tests/generic/261.out
new file mode 100644
index 0000000..7e0e562
--- /dev/null
+++ b/tests/generic/261.out
@@ -0,0 +1,13 @@
+QA output created by 261
+Format and mount
+Create the original files
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-261/file1
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-261/file2
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-261/file2.chk
+CoW and unmount
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-261/file1
+91b31bb8bffa8c3d3374445039287226  SCRATCH_MNT/test-261/file2
+91b31bb8bffa8c3d3374445039287226  SCRATCH_MNT/test-261/file2.chk
+Check for damage
diff --git a/tests/generic/262 b/tests/generic/262
new file mode 100755
index 0000000..4050f34
--- /dev/null
+++ b/tests/generic/262
@@ -0,0 +1,96 @@
+#! /bin/bash
+# FS QA Test No. 262
+#
+# finsert a file at midway through a CoW region.
+#
+# This test is dependent on the system page size, so we cannot use md5 in
+# the golden output; we can only compare to a check file.
+#
+#-----------------------------------------------------------------------
+# 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".*
+}
+
+# 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 "finsert"
+
+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
+
+blksz=65536
+nr=4
+
+echo "Create the original files"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$testdir/file1" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$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 0x62 -b $((blksz * 2)) $blksz $((blksz * 2))" -c "finsert $((blksz * 2)) $blksz" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+_pwrite_byte 0x62 $blksz $blksz "$testdir/file2.chk" >> "$seqres.full"
+_pwrite_byte 0x00 $((blksz * 2)) $blksz "$testdir/file2.chk" >> "$seqres.full"
+_pwrite_byte 0x62 $((blksz * 3)) $blksz "$testdir/file2.chk" >> "$seqres.full"
+_pwrite_byte 0x61 $((blksz * 4)) $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"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/262.out b/tests/generic/262.out
new file mode 100644
index 0000000..cc582ba
--- /dev/null
+++ b/tests/generic/262.out
@@ -0,0 +1,13 @@
+QA output created by 262
+Format and mount
+Create the original files
+Compare files
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-262/file1
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-262/file2
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-262/file2.chk
+CoW and unmount
+Compare files
+c946b71bb69c07daf25470742c967e7c  SCRATCH_MNT/test-262/file1
+b9f7a56c2ab90569cb19d8597583c6a6  SCRATCH_MNT/test-262/file2
+b9f7a56c2ab90569cb19d8597583c6a6  SCRATCH_MNT/test-262/file2.chk
+Check for damage
diff --git a/tests/generic/264 b/tests/generic/264
new file mode 100755
index 0000000..7a81fa7
--- /dev/null
+++ b/tests/generic/264
@@ -0,0 +1,93 @@
+#! /bin/bash
+# FS QA Test No. 264
+#
+# fallocate a file at midway through a CoW region.
+#
+# This test is dependent on the system page size, so we cannot use md5 in
+# the golden output; we can only compare to a check file.
+#
+#-----------------------------------------------------------------------
+# 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 "$tmp".*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_scratch_reflink
+_require_cp_reflink
+_require_xfs_io_command "falloc"
+
+rm -f "$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
+
+blksz=65536
+nr=5
+
+echo "Create the original files"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$testdir/file1" >> "$seqres.full"
+_cp_reflink "$testdir/file1" "$testdir/file2" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * nr)) "$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 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" -c "falloc $((blksz * 2)) $blksz" "$testdir/file2" >> "$seqres.full"
+_scratch_remount
+"$XFS_IO_PROG" -f -c "pwrite -S 0x62 -b $((blksz * 3)) $blksz $((blksz * 3))" "$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"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/264.out b/tests/generic/264.out
new file mode 100644
index 0000000..de175f9
--- /dev/null
+++ b/tests/generic/264.out
@@ -0,0 +1,13 @@
+QA output created by 264
+Format and mount
+Create the original files
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-264/file1
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-264/file2
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-264/file2.chk
+CoW and unmount
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-264/file1
+3383b9c17e643acd1a9a249cf041e183  SCRATCH_MNT/test-264/file2
+3383b9c17e643acd1a9a249cf041e183  SCRATCH_MNT/test-264/file2.chk
+Check for damage
diff --git a/tests/generic/group b/tests/generic/group
index 1767484..0b584d9 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -255,12 +255,18 @@
 250 auto quick
 251 ioctl trim
 252 auto quick
+253 auto quick clone
+254 auto quick clone
 255 auto quick prealloc
 256 auto quick
 257 dir auto quick
 258 auto quick
+259 auto quick clone
 260 auto quick trim
+261 auto quick clone
+262 auto quick clone
 263 rw auto quick
+264 auto quick clone
 269 auto rw prealloc ioctl enospc stress
 270 auto quota rw prealloc ioctl enospc stress
 273 auto rw