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Date:	Tue, 06 Oct 2015 22:13:30 -0700
From:	"Darrick J. Wong" <darrick.wong@...cle.com>
To:	david@...morbit.com, darrick.wong@...cle.com
Cc:	Anna.Schumaker@...app.com, linux-ext4@...r.kernel.org,
	linux-btrfs@...r.kernel.org, fstests@...r.kernel.org,
	xfs@....sgi.com
Subject: [PATCH 04/12] reflink: basic tests of the reflink and dedupe ioctls

Test the operation of the btrfs (and now xfs) reflink and dedupe
ioctls at various file offsets and with matching and nonmatching
files.

Signed-off-by: Darrick J. Wong <darrick.wong@...cle.com>
---
 common/rc             |    9 +++
 tests/generic/803     |   89 ++++++++++++++++++++++++++
 tests/generic/803.out |    4 +
 tests/generic/804     |   90 ++++++++++++++++++++++++++
 tests/generic/804.out |    7 ++
 tests/generic/805     |  171 +++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/805.out |   18 +++++
 tests/generic/806     |   89 ++++++++++++++++++++++++++
 tests/generic/806.out |    4 +
 tests/generic/807     |   89 ++++++++++++++++++++++++++
 tests/generic/807.out |    8 ++
 tests/generic/817     |  125 ++++++++++++++++++++++++++++++++++++
 tests/generic/817.out |    8 ++
 tests/generic/818     |  125 ++++++++++++++++++++++++++++++++++++
 tests/generic/818.out |    9 +++
 tests/generic/819     |  128 +++++++++++++++++++++++++++++++++++++
 tests/generic/819.out |    7 ++
 tests/generic/group   |    8 ++
 18 files changed, 988 insertions(+)
 create mode 100755 tests/generic/803
 create mode 100644 tests/generic/803.out
 create mode 100755 tests/generic/804
 create mode 100644 tests/generic/804.out
 create mode 100755 tests/generic/805
 create mode 100644 tests/generic/805.out
 create mode 100755 tests/generic/806
 create mode 100644 tests/generic/806.out
 create mode 100755 tests/generic/807
 create mode 100644 tests/generic/807.out
 create mode 100755 tests/generic/817
 create mode 100644 tests/generic/817.out
 create mode 100755 tests/generic/818
 create mode 100644 tests/generic/818.out
 create mode 100755 tests/generic/819
 create mode 100644 tests/generic/819.out


diff --git a/common/rc b/common/rc
index 7e2f140..639f355 100644
--- a/common/rc
+++ b/common/rc
@@ -82,6 +82,15 @@ _md5_checksum()
 	md5sum $1 | cut -d ' ' -f1
 }
 
+# Prints the md5 checksum of a part of a given file
+_md5_range_checksum() {
+	file="$1"
+	offset="$2"
+	len="$3"
+
+	md5sum <($XFS_IO_PROG -f -c "pread -q -v $offset $len" "$file" | sed -e 's/^.*:  //g') | cut -d ' ' -f 1
+}
+
 
 # ls -l w/ selinux sometimes puts a dot at the end:
 # -rwxrw-r--. id1 id2 file1
diff --git a/tests/generic/803 b/tests/generic/803
new file mode 100755
index 0000000..d5595ed
--- /dev/null
+++ b/tests/generic/803
@@ -0,0 +1,89 @@
+#! /bin/bash
+# FS QA Test No. 803
+#
+# Ensure that we can reflink parts of two identical files:
+#   - Reflink identical parts of two identical files
+#   - Check that we still have identical contents
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(( $(stat -f $TESTDIR -c '%S') * 64))"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x61 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file2 >> $seqres.full
+sync
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file2) \
+       || echo "Files do not match"
+
+echo "Reflink the middle blocks together"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 $((BLKSZ * 4)) $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2 >> $seqres.full
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> $seqres.full
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file2) \
+       || echo "Start sections do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Middle sections do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "End sections do not match"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/803.out b/tests/generic/803.out
new file mode 100644
index 0000000..1108990
--- /dev/null
+++ b/tests/generic/803.out
@@ -0,0 +1,4 @@
+QA output created by 803
+Create the original files
+Reflink the middle blocks together
+Compare sections
diff --git a/tests/generic/804 b/tests/generic/804
new file mode 100755
index 0000000..cc39e4d
--- /dev/null
+++ b/tests/generic/804
@@ -0,0 +1,90 @@
+#! /bin/bash
+# FS QA Test No. 804
+#
+# Ensuring that we can reflink non-matching parts of files:
+#   - Reflink identical ranges of two different files
+#   - Check that the non-linked ranges still do not match
+#   - Check that we end up with identical contents in the linked ranges
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(( $(stat -f $TESTDIR -c '%S') * 64))"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file2 >> $seqres.full
+sync
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file2) \
+       || echo "Files do not match (intentional)"
+
+echo "Reflink the middle blocks together"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 $((BLKSZ * 4)) $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2 >> $seqres.full
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> $seqres.full
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file2) \
+       || echo "Start sections do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Middle sections do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "End sections do not match (intentional)"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/804.out b/tests/generic/804.out
new file mode 100644
index 0000000..df0a551
--- /dev/null
+++ b/tests/generic/804.out
@@ -0,0 +1,7 @@
+QA output created by 804
+Create the original files
+Files do not match (intentional)
+Reflink the middle blocks together
+Compare sections
+Start sections do not match (intentional)
+End sections do not match (intentional)
diff --git a/tests/generic/805 b/tests/generic/805
new file mode 100755
index 0000000..f926fb7
--- /dev/null
+++ b/tests/generic/805
@@ -0,0 +1,171 @@
+#! /bin/bash
+# FS QA Test No. 805
+#
+# Reflinking two sets of files together:
+#   - Reflink identical parts of two identical files
+#   - Reflink identical parts of two other identical files
+#   - Reflink identical parts of all four files
+#   - Check that we end up with identical contents
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(( $(stat -f $TESTDIR -c '%S') * 64))"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((BLKSZ * 8))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKSZ * 8))" $TESTDIR/file2 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x63 0 $((BLKSZ * 8))" $TESTDIR/file3 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x64 0 $((BLKSZ * 8))" $TESTDIR/file4 >> $seqres.full
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file2) \
+       || echo "Files 1-2 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file3) \
+       || echo "Files 1-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file4) \
+       || echo "Files 1-4 do not match (intentional)"
+
+echo "Reflink the first blocks together"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 0 0 $((BLKSZ * 4))" $TESTDIR/file2 >> $seqres.full
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file3 0 0 $((BLKSZ * 4))" $TESTDIR/file4 >> $seqres.full
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> $seqres.full
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file2) \
+       || echo "Sections of file 1-2 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file3) \
+       || echo "Sections of file 1-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file3) \
+       || echo "Sections of file 1-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file3) \
+       || echo "Sections of file 2-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file3) \
+       || echo "Sections of file 2-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file3) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 4))" $TESTDIR/file4) \
+       || echo "Sections of file 3-4 do not match"
+
+echo "Reflink the middle blocks together"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 0 0 $((BLKSZ * 2))" $TESTDIR/file3 >> $seqres.full
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 0 0 $((BLKSZ * 2))" $TESTDIR/file4 >> $seqres.full
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> $seqres.full
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Sections of files 1-2 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file3) \
+       || echo "Sections of files 1-3 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file4) \
+       || echo "Sections of files 1-4 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Sections of files 2-3 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file3) \
+       || echo "Sections of files 2-4 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file3) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 2))" $TESTDIR/file4) \
+       || echo "Sections of files 3-4 do not match"
+
+echo "Compare previously reflinked sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Sections of file 1-2 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file3) \
+       || echo "Sections of file 1-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file3) \
+       || echo "Sections of file 1-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file3) \
+       || echo "Sections of file 2-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file3) \
+       || echo "Sections of file 2-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file3) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 2)) $((BLKSZ * 2))" $TESTDIR/file4) \
+       || echo "Sections of file 3-4 do not match"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/805.out b/tests/generic/805.out
new file mode 100644
index 0000000..5c9629e
--- /dev/null
+++ b/tests/generic/805.out
@@ -0,0 +1,18 @@
+QA output created by 805
+Create the original files
+Files 1-2 do not match (intentional)
+Files 1-3 do not match (intentional)
+Files 1-4 do not match (intentional)
+Reflink the first blocks together
+Compare sections
+Sections of file 1-3 do not match (intentional)
+Sections of file 1-4 do not match (intentional)
+Sections of file 2-3 do not match (intentional)
+Sections of file 2-4 do not match (intentional)
+Reflink the middle blocks together
+Compare sections
+Compare previously reflinked sections
+Sections of file 1-3 do not match (intentional)
+Sections of file 1-4 do not match (intentional)
+Sections of file 2-3 do not match (intentional)
+Sections of file 2-4 do not match (intentional)
diff --git a/tests/generic/806 b/tests/generic/806
new file mode 100755
index 0000000..defcc20
--- /dev/null
+++ b/tests/generic/806
@@ -0,0 +1,89 @@
+#! /bin/bash
+# FS QA Test No. 806
+#
+# Ensure that we can dedupe parts of two files:
+#   - Dedupe identical parts of two identical files
+#   - Check that still have identical contents
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "dedupe"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x61 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file2 >> $seqres.full
+sync
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file2) \
+       || echo "Files do not match"
+
+echo "Dedupe the middle blocks together"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+$XFS_IO_PROG -f -c "dedupe $TESTDIR/file1 $((BLKSZ * 4)) $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2 >> $seqres.full
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> $seqres.full
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file2) \
+       || echo "Start sections do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Middle sections do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "End sections do not match"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/806.out b/tests/generic/806.out
new file mode 100644
index 0000000..7c0fbf2
--- /dev/null
+++ b/tests/generic/806.out
@@ -0,0 +1,4 @@
+QA output created by 806
+Create the original files
+Dedupe the middle blocks together
+Compare sections
diff --git a/tests/generic/807 b/tests/generic/807
new file mode 100755
index 0000000..e86339d
--- /dev/null
+++ b/tests/generic/807
@@ -0,0 +1,89 @@
+#! /bin/bash
+# FS QA Test No. 807
+#
+# Ensuring that we cannot dedupe non-matching parts of files:
+#   - Fail to dedupe non-identical parts of two different files
+#   - Check that nothing changes in either 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "dedupe"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 $((BLKSZ * 2)) $((BLKSZ * 6))" $TESTDIR/file2 >> $seqres.full
+sync
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v 0 $((BLKSZ * 8))" $TESTDIR/file2) \
+       || echo "Files do not match (intentional)"
+
+echo "(Fail to) dedupe the middle blocks together"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+$XFS_IO_PROG -f -c "dedupe $TESTDIR/file1 $((BLKSZ * 4)) $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2 >> $seqres.full
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> $seqres.full
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 0)) $((BLKSZ * 4))" $TESTDIR/file2) \
+       || echo "Start sections do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 4)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "Middle sections do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $((BLKSZ * 6)) $((BLKSZ * 2))" $TESTDIR/file2) \
+       || echo "End sections do not match (intentional)"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/807.out b/tests/generic/807.out
new file mode 100644
index 0000000..9422bc1
--- /dev/null
+++ b/tests/generic/807.out
@@ -0,0 +1,8 @@
+QA output created by 807
+Create the original files
+Files do not match (intentional)
+(Fail to) dedupe the middle blocks together
+Compare sections
+Start sections do not match (intentional)
+Middle sections do not match (intentional)
+End sections do not match (intentional)
diff --git a/tests/generic/817 b/tests/generic/817
new file mode 100755
index 0000000..109a9d8
--- /dev/null
+++ b/tests/generic/817
@@ -0,0 +1,125 @@
+#! /bin/bash
+# FS QA Test No. 817
+#
+# Ensure that we can reflink the last block of a file whose size isn't
+# block-aligned.
+#   - Create two 'a' files file whose size isn't block-aligned.
+#   - Create two 'b' files file whose size isn't block-aligned.
+#   - Reflink the last block of file1 to the last block in file2 and file3.
+#   - Check that files 1-2 match, 3-4 don't match, and that nothing matches 3.
+#   - Check that the ends of 1-3 match, and 1-3 do not match the end of file4.
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((BLKSZ + 37))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((BLKSZ + 37))" $TESTDIR/file2 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKSZ + 37))" $TESTDIR/file3 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKSZ + 37))" $TESTDIR/file4 >> $seqres.full
+
+C1="$(_md5_checksum $TESTDIR/file1)"
+C2="$(_md5_checksum $TESTDIR/file2)"
+C3="$(_md5_checksum $TESTDIR/file3)"
+C4="$(_md5_checksum $TESTDIR/file4)"
+
+test "${C1}" = "${C2}" || echo "file1 and file2 should match"
+test "${C1}" != "${C3}" || echo "file1 and file3 should not match"
+test "${C1}" != "${C4}" || echo "file1 and file4 should not match"
+test "${C2}" != "${C3}" || echo "file2 and file3 should not match"
+test "${C2}" != "${C4}" || echo "file2 and file4 should not match"
+test "${C3}" = "${C4}" || echo "file3 and file4 should match"
+
+echo "Reflink the last blocks together"
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 $BLKSZ $BLKSZ 37" $TESTDIR/file2 >> $seqres.full
+$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 $BLKSZ $BLKSZ 37" $TESTDIR/file3 >> $seqres.full
+_test_remount
+
+C1="$(_md5_checksum $TESTDIR/file1)"
+C2="$(_md5_checksum $TESTDIR/file2)"
+C3="$(_md5_checksum $TESTDIR/file3)"
+C4="$(_md5_checksum $TESTDIR/file4)"
+
+echo "Compare files"
+test "${C1}" = "${C2}" || echo "file1 and file2 should match"
+test "${C1}" != "${C3}" || echo "file1 and file3 should not match"
+test "${C1}" != "${C4}" || echo "file1 and file4 should not match"
+test "${C2}" != "${C3}" || echo "file2 and file3 should not match"
+test "${C2}" != "${C4}" || echo "file2 and file4 should not match"
+test "${C3}" != "${C4}" || echo "file3 and file4 should match"
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file2) \
+       || echo "End sections of files 1-2 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file3) \
+       || echo "End sections of files 1-3 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file4) \
+       || echo "End sections of files 1-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file2) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file3) \
+       || echo "End sections of files 2-3 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file2) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file4) \
+       || echo "End sections of files 2-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file3) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file4) \
+       || echo "End sections of files 3-4 do not match (intentional)"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/817.out b/tests/generic/817.out
new file mode 100644
index 0000000..3574727
--- /dev/null
+++ b/tests/generic/817.out
@@ -0,0 +1,8 @@
+QA output created by 817
+Create the original files
+Reflink the last blocks together
+Compare files
+Compare sections
+End sections of files 1-4 do not match (intentional)
+End sections of files 2-4 do not match (intentional)
+End sections of files 3-4 do not match (intentional)
diff --git a/tests/generic/818 b/tests/generic/818
new file mode 100755
index 0000000..0a99768
--- /dev/null
+++ b/tests/generic/818
@@ -0,0 +1,125 @@
+#! /bin/bash
+# FS QA Test No. 818
+#
+# Ensure that we can dedupe the last block of a file whose size isn't
+# block-aligned.
+#   - Create two 'a' files file whose size isn't block-aligned.
+#   - Create two 'b' files file whose size isn't block-aligned.
+#   - Dedupe the last block of file1 to the last block in file2 and file3.
+#   - Check that files 1-2 match, and that 3-4 match.
+#   - Check that the ends of 1-2 and 3-4 match, and that 1-3 don't match.
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "dedupe"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((BLKSZ + 37))" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $((BLKSZ + 37))" $TESTDIR/file2 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKSZ + 37))" $TESTDIR/file3 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 0 $((BLKSZ + 37))" $TESTDIR/file4 >> $seqres.full
+
+C1="$(_md5_checksum $TESTDIR/file1)"
+C2="$(_md5_checksum $TESTDIR/file2)"
+C3="$(_md5_checksum $TESTDIR/file3)"
+C4="$(_md5_checksum $TESTDIR/file4)"
+
+test "${C1}" = "${C2}" || echo "file1 and file2 should match"
+test "${C1}" != "${C3}" || echo "file1 and file3 should not match"
+test "${C1}" != "${C4}" || echo "file1 and file4 should not match"
+test "${C2}" != "${C3}" || echo "file2 and file3 should not match"
+test "${C2}" != "${C4}" || echo "file2 and file4 should not match"
+test "${C3}" = "${C4}" || echo "file3 and file4 should match"
+
+echo "Dedupe the last blocks together"
+$XFS_IO_PROG -f -c "dedupe $TESTDIR/file1 $BLKSZ $BLKSZ 37" $TESTDIR/file2 >> $seqres.full
+$XFS_IO_PROG -f -c "dedupe $TESTDIR/file1 $BLKSZ $BLKSZ 37" $TESTDIR/file3 >> $seqres.full
+_test_remount
+
+C1="$(_md5_checksum $TESTDIR/file1)"
+C2="$(_md5_checksum $TESTDIR/file2)"
+C3="$(_md5_checksum $TESTDIR/file3)"
+C4="$(_md5_checksum $TESTDIR/file4)"
+
+echo "Compare files"
+test "${C1}" = "${C2}" || echo "file1 and file2 should match"
+test "${C1}" != "${C3}" || echo "file1 and file3 should not match"
+test "${C1}" != "${C4}" || echo "file1 and file4 should not match"
+test "${C2}" != "${C3}" || echo "file2 and file3 should not match"
+test "${C2}" != "${C4}" || echo "file2 and file4 should not match"
+test "${C3}" = "${C4}" || echo "file3 and file4 should match"
+
+echo "Compare sections"
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file2) \
+       || echo "End sections of files 1-2 do not match"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file3) \
+       || echo "End sections of files 1-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file1) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file4) \
+       || echo "End sections of files 1-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file2) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file3) \
+       || echo "End sections of files 2-3 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file2) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file4) \
+       || echo "End sections of files 2-4 do not match (intentional)"
+
+cmp -s <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file3) \
+       <($XFS_IO_PROG -f -c "pread -q -v $BLKSZ 37" $TESTDIR/file4) \
+       || echo "End sections of files 3-4 do not match"
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/818.out b/tests/generic/818.out
new file mode 100644
index 0000000..242dc8c
--- /dev/null
+++ b/tests/generic/818.out
@@ -0,0 +1,9 @@
+QA output created by 818
+Create the original files
+Dedupe the last blocks together
+Compare files
+Compare sections
+End sections of files 1-3 do not match (intentional)
+End sections of files 1-4 do not match (intentional)
+End sections of files 2-3 do not match (intentional)
+End sections of files 2-4 do not match (intentional)
diff --git a/tests/generic/819 b/tests/generic/819
new file mode 100755
index 0000000..08bc374
--- /dev/null
+++ b/tests/generic/819
@@ -0,0 +1,128 @@
+#! /bin/bash
+# FS QA Test No. 819
+#
+# Ensure that we can reflink and dedupe blocks within the same file...
+#   - Create a file with three distinct blocks ABB
+#   - Reflink block zero to the multiple-of-three blocks
+#   - Reflink block one to the multiple-of-five blocks
+#   - Dedupe block two to the multiple-of-seven blocks
+#   - Check that we successfully avoid deduping with holes, unwritten
+#     extents, and non-matches; but actually dedupe real matches.
+#
+#-----------------------------------------------------------------------
+# 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
+
+# real QA test starts here
+_require_test_reflink
+_supported_os Linux
+
+_require_xfs_io_command "reflink"
+_require_xfs_io_command "dedupe"
+_require_xfs_io_command "falloc"
+_require_test
+
+rm -f $seqres.full
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f $TESTDIR -c '%S')"
+$XFS_IO_PROG -f -c "pwrite -S 0x61 0 $BLKSZ" $TESTDIR/file1 >> $seqres.full
+$XFS_IO_PROG -f -c "pwrite -S 0x62 $BLKSZ $((BLKSZ * 2))" $TESTDIR/file1 >> $seqres.full
+
+NR_BLKS=1024
+
+echo "fallocate half the file"
+$XFS_IO_PROG -f -c "falloc $((NR_BLKS * BLKSZ / 2)) $((NR_BLKS * BLKSZ / 2))" $TESTDIR/file1 >> $seqres.full
+
+echo "Reflink block zero to the threes"
+seq 1 $((NR_BLKS / 3)) | while read nr; do
+	$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 0 $((nr * 3 * BLKSZ)) $BLKSZ" $TESTDIR/file1 >> $seqres.full
+done
+
+echo "Reflink block one to the fives"
+seq 1 $((NR_BLKS / 5)) | while read nr; do
+	$XFS_IO_PROG -f -c "reflink $TESTDIR/file1 $BLKSZ $((nr * 5 * BLKSZ)) $BLKSZ" $TESTDIR/file1 >> $seqres.full
+done
+
+echo "Dedupe block two to the sevens"
+seq 1 $((NR_BLKS / 7)) | while read nr; do
+	$XFS_IO_PROG -f -c "dedupe $TESTDIR/file1 $((BLKSZ * 2)) $((nr * 7 * BLKSZ)) $BLKSZ" $TESTDIR/file1 >> $seqres.full
+done
+
+_test_remount
+
+echo "Check block mappings"
+crcZ=$(_md5_range_checksum /dev/zero 0 $BLKSZ)
+crc0=$(_md5_range_checksum $TESTDIR/file1 0 $BLKSZ)
+crc1=$(_md5_range_checksum $TESTDIR/file1 $BLKSZ $BLKSZ)
+crc2=$(_md5_range_checksum $TESTDIR/file1 $((BLKSZ * 2)) $BLKSZ)
+
+check_block() {
+	lblk="$1"
+	rem7=$((lblk % 7))
+	rem5=$((lblk % 5))
+	rem3=$((lblk % 3))
+
+	crc=$(_md5_range_checksum $TESTDIR/file1 $((lblk * BLKSZ)) $BLKSZ)
+
+	if [ $rem7 -eq 0 ]; then
+		if [ $rem5 -eq 0 ]; then
+			test $crc2 = $crc || echo "lblk $lblk doesn't match block 2"
+		elif [ $rem3 -eq 0 ]; then
+			test $crc0 = $crc || echo "lblk $lblk doesn't match block 0"
+		elif [ $lblk -lt $((NR_BLKS / 2)) ]; then
+			test $crcZ = $crc || echo "lblk $lblk isn't zeroed"
+		fi
+	elif [ $rem5 -eq 0 ]; then
+		test $crc1 = $crc || echo "lblk $lblk doesn't match block 1"
+	elif [ $rem3 -eq 0 ]; then
+		test $crc0 = $crc || echo "lblk $lblk doesn't match block 0"
+	elif [ $lblk -lt $((NR_BLKS / 2)) ]; then
+		test $crcZ = $crc || echo "lblk $lblk isn't zeroed"
+	fi
+}
+
+seq 3 $((NR_BLKS - 1)) | while read lblk; do
+	err="$(check_block $lblk)"
+	test -n "$err" && echo "$lblk: $err"
+done
+
+# success, all done
+status=0
+exit
diff --git a/tests/generic/819.out b/tests/generic/819.out
new file mode 100644
index 0000000..0ee5b14
--- /dev/null
+++ b/tests/generic/819.out
@@ -0,0 +1,7 @@
+QA output created by 819
+Create the original file blocks
+fallocate half the file
+Reflink block zero to the threes
+Reflink block one to the fives
+Dedupe block two to the sevens
+Check block mappings
diff --git a/tests/generic/group b/tests/generic/group
index d8b21ce..25cffa7 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -210,3 +210,11 @@
 800 auto quick clone
 801 auto quick clone
 802 auto quick clone
+803 auto quick clone
+804 auto quick clone
+805 auto quick clone
+806 auto quick clone
+807 auto quick clone
+817 auto quick clone
+818 auto quick clone
+819 auto quick clone

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