diff mbox

[03/11] reflink: basic tests of the reflink and dedupe ioctls

Message ID 20151111192648.15056.40329.stgit@birch.djwong.org (mailing list archive)
State Not Applicable
Headers show

Commit Message

Darrick J. Wong Nov. 11, 2015, 7:26 p.m. UTC 
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@oracle.com>
---
 tests/generic/803     |   92 +++++++++++++++++++++++++++
 tests/generic/803.out |    8 ++
 tests/generic/804     |   93 +++++++++++++++++++++++++++
 tests/generic/804.out |   11 +++
 tests/generic/805     |  170 +++++++++++++++++++++++++++++++++++++++++++++++++
 tests/generic/805.out |   30 +++++++++
 tests/generic/806     |   92 +++++++++++++++++++++++++++
 tests/generic/806.out |    8 ++
 tests/generic/807     |   92 +++++++++++++++++++++++++++
 tests/generic/807.out |   12 +++
 tests/generic/817     |  128 +++++++++++++++++++++++++++++++++++++
 tests/generic/817.out |   16 +++++
 tests/generic/818     |  128 +++++++++++++++++++++++++++++++++++++
 tests/generic/818.out |   17 +++++
 tests/generic/819     |  131 ++++++++++++++++++++++++++++++++++++++
 tests/generic/819.out |    8 ++
 tests/generic/group   |    8 ++
 17 files changed, 1044 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



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diff mbox

Patch

diff --git a/tests/generic/803 b/tests/generic/803
new file mode 100755
index 0000000..14c9e98
--- /dev/null
+++ b/tests/generic/803
@@ -0,0 +1,92 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_reflink
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x61 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file2" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 8)) \
+       || echo "Files do not match"
+
+echo "Reflink the middle blocks together"
+free_before="$(stat -f -c '%a' "$TESTDIR")"
+_reflink_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) >> "$seqres.full"
+_test_remount
+free_after="$(stat -f -c '%a' "$TESTDIR")"
+echo "freesp changed by $free_before -> $free_after" >> "$seqres.full"
+
+echo "Compare sections"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 4)) \
+       || echo "Start sections do not match"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) \
+       || echo "Middle sections do not match"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 6)) "$TESTDIR/file2" \
+		$((BLKSZ * 6)) $((BLKSZ * 2)) \
+       || 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..09099aa
--- /dev/null
+++ b/tests/generic/803.out
@@ -0,0 +1,8 @@ 
+QA output created by 803
+Create the original files
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-803/file1
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-803/file2
+Reflink the middle blocks together
+Compare sections
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-803/file1
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-803/file2
diff --git a/tests/generic/804 b/tests/generic/804
new file mode 100755
index 0000000..611ad51
--- /dev/null
+++ b/tests/generic/804
@@ -0,0 +1,93 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_reflink
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file2" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 8)) \
+       || echo "Files do not match (intentional)"
+
+echo "Reflink the middle blocks together"
+free_before="$(stat -f -c '%a' "$TESTDIR")"
+_reflink_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) >> "$seqres.full"
+_test_remount
+free_after="$(stat -f -c '%a' "$TESTDIR")"
+echo "freesp changed by $free_before -> $free_after" >> "$seqres.full"
+
+echo "Compare sections"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 4)) \
+       || echo "Start sections do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) \
+       || echo "Middle sections do not match"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 6)) "$TESTDIR/file2" \
+		$((BLKSZ * 6)) $((BLKSZ * 2)) \
+       || 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..ad40ca2
--- /dev/null
+++ b/tests/generic/804.out
@@ -0,0 +1,11 @@ 
+QA output created by 804
+Create the original files
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-804/file1
+5e3501f97fd2669babfcbd3e1972e833  TEST_DIR/test-804/file2
+Files do not match (intentional)
+Reflink the middle blocks together
+Compare sections
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-804/file1
+f7f9e44d37909868014e9151f5293ab0  TEST_DIR/test-804/file2
+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..41ef722
--- /dev/null
+++ b/tests/generic/805
@@ -0,0 +1,170 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_reflink
+
+rm -f "$seqres.full"
+
+TESTDIR=$TEST_DIR/test-$seq
+rm -rf $TESTDIR
+mkdir $TESTDIR
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 0 $((BLKSZ * 8)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ * 8)) "$TESTDIR/file2" >> "$seqres.full"
+_pwrite_byte 0x63 0 $((BLKSZ * 8)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x64 0 $((BLKSZ * 8)) "$TESTDIR/file4" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 8)) \
+       || echo "Files 1-2 do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file3" 0 $((BLKSZ * 8)) \
+       || echo "Files 1-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file4" 0 $((BLKSZ * 8)) \
+       || echo "Files 1-4 do not match (intentional)"
+
+echo "Reflink the first four blocks together, 1-2 3-4"
+free_before="$(stat -f -c '%a' "$TESTDIR")"
+_reflink_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 4)) >> "$seqres.full"
+_reflink_range "$TESTDIR/file3" 0 "$TESTDIR/file4" 0 $((BLKSZ * 4)) >> "$seqres.full"
+_test_remount
+free_after="$(stat -f -c '%a' "$TESTDIR")"
+echo "freesp changed by $free_before -> $free_after" >> "$seqres.full"
+
+echo "Compare sections"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 4)) \
+       || echo "Sections of file 1-2 do not match"
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file3" 0 $((BLKSZ * 4)) \
+       || echo "Sections of file 1-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file4" 0 $((BLKSZ * 4)) \
+       || echo "Sections of file 1-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" 0 "$TESTDIR/file3" 0 $((BLKSZ * 4)) \
+       || echo "Sections of file 2-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" 0 "$TESTDIR/file4" 0 $((BLKSZ * 4)) \
+       || echo "Sections of file 2-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file3" 0 "$TESTDIR/file4" 0 $((BLKSZ * 4)) \
+       || echo "Sections of file 3-4 do not match"
+
+echo "Reflink the first two blocks together, 1-3 1-4"
+free_before="$(stat -f -c '%a' $TESTDIR)"
+_reflink_range "$TESTDIR/file1" 0 "$TESTDIR/file3" 0 $((BLKSZ * 2)) >> "$seqres.full"
+_reflink_range "$TESTDIR/file1" 0 "$TESTDIR/file4" 0 $((BLKSZ * 2)) >> "$seqres.full"
+_test_remount
+free_after="$(stat -f -c '%a' $TESTDIR)"
+echo "freesp changed by $free_before -> $free_after" >> "$seqres.full"
+
+echo "Compare sections"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 2)) \
+       || echo "Sections of files 1-2 do not match"
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file3" 0 $((BLKSZ * 2)) \
+       || echo "Sections of files 1-3 do not match"
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file4" 0 $((BLKSZ * 2)) \
+       || echo "Sections of files 1-4 do not match"
+
+_compare_range "$TESTDIR/file2" 0 "$TESTDIR/file3" 0 $((BLKSZ * 2)) \
+       || echo "Sections of files 2-3 do not match"
+
+_compare_range "$TESTDIR/file2" 0 "$TESTDIR/file4" 0 $((BLKSZ * 2)) \
+       || echo "Sections of files 2-4 do not match"
+
+_compare_range "$TESTDIR/file3" 0 "$TESTDIR/file4" 0 $((BLKSZ * 2)) \
+       || echo "Sections of files 3-4 do not match"
+
+echo "Compare previously reflinked sections"
+_compare_range "$TESTDIR/file1" $((BLKSZ * 2)) "$TESTDIR/file2" \
+		$((BLKSZ * 2)) $((BLKSZ * 2)) \
+       || echo "Sections of file 1-2 do not match"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 2)) "$TESTDIR/file3" \
+		$((BLKSZ * 2)) $((BLKSZ * 2)) \
+       || echo "Sections of file 1-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 2)) "$TESTDIR/file4" \
+		$((BLKSZ * 2)) $((BLKSZ * 2)) \
+       || echo "Sections of file 1-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" $((BLKSZ * 2)) "$TESTDIR/file3" \
+		$((BLKSZ * 2)) $((BLKSZ * 2)) \
+       || echo "Sections of file 2-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" $((BLKSZ * 2)) "$TESTDIR/file4" \
+		$((BLKSZ * 2)) $((BLKSZ * 2)) \
+       || echo "Sections of file 2-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file3" $((BLKSZ * 2)) "$TESTDIR/file4" \
+		$((BLKSZ * 2)) $((BLKSZ * 2)) \
+       || 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..82f9658
--- /dev/null
+++ b/tests/generic/805.out
@@ -0,0 +1,30 @@ 
+QA output created by 805
+Create the original files
+30c2557e8302a5beb290c71520d87f42  TEST_DIR/test-805/file1
+efb787f7990e43c7dc30565d8cc344d4  TEST_DIR/test-805/file2
+c83f38d4622a78b74e3480634194b08f  TEST_DIR/test-805/file3
+1c11fd3151d2229f5cf43903386aa432  TEST_DIR/test-805/file4
+Files 1-2 do not match (intentional)
+Files 1-3 do not match (intentional)
+Files 1-4 do not match (intentional)
+Reflink the first four blocks together, 1-2 3-4
+Compare sections
+30c2557e8302a5beb290c71520d87f42  TEST_DIR/test-805/file1
+63bdb182cdf03a8a19e83234d869d00a  TEST_DIR/test-805/file2
+c83f38d4622a78b74e3480634194b08f  TEST_DIR/test-805/file3
+dc2ae3db14e97fad93faf939170b085c  TEST_DIR/test-805/file4
+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 first two blocks together, 1-3 1-4
+Compare sections
+30c2557e8302a5beb290c71520d87f42  TEST_DIR/test-805/file1
+63bdb182cdf03a8a19e83234d869d00a  TEST_DIR/test-805/file2
+89a444ff9d6af60ba487e9a0ca2161e2  TEST_DIR/test-805/file3
+0c263058794a54c5e197ece52386f5be  TEST_DIR/test-805/file4
+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..ab973e3
--- /dev/null
+++ b/tests/generic/806
@@ -0,0 +1,92 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_reflink
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x61 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file2" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 8)) \
+       || echo "Files 1-2 do not match (intentional)"
+
+echo "Dedupe the middle blocks together"
+free_before="$(stat -f -c '%a' "$TESTDIR")"
+_dedupe_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) >> "$seqres.full"
+_test_remount
+free_after="$(stat -f -c '%a' "$TESTDIR")"
+echo "freesp changed by $free_before -> $free_after" >> "$seqres.full"
+
+echo "Compare sections"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 4)) \
+       || echo "Start sections do not match"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) \
+       || echo "Middle sections do not match"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 6)) "$TESTDIR/file2" \
+		$((BLKSZ * 6)) $((BLKSZ * 2)) \
+       || 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..781b545
--- /dev/null
+++ b/tests/generic/806.out
@@ -0,0 +1,8 @@ 
+QA output created by 806
+Create the original files
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-806/file1
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-806/file2
+Dedupe the middle blocks together
+Compare sections
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-806/file1
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-806/file2
diff --git a/tests/generic/807 b/tests/generic/807
new file mode 100755
index 0000000..6f5168a
--- /dev/null
+++ b/tests/generic/807
@@ -0,0 +1,92 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_dedupe
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x62 $((BLKSZ * 2)) $((BLKSZ * 6)) "$TESTDIR/file2" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 "$((BLKSZ * 8))" \
+       || echo "Files 1-2 do not match (intentional)"
+
+echo "(Fail to) dedupe the middle blocks together"
+free_before="$(stat -f -c '%a' "$TESTDIR")"
+_dedupe_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) >> "$seqres.full"
+_test_remount
+free_after="$(stat -f -c '%a' "$TESTDIR")"
+echo "freesp changed by $free_before -> $free_after" >> "$seqres.full"
+
+echo "Compare sections"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+
+_compare_range "$TESTDIR/file1" 0 "$TESTDIR/file2" 0 $((BLKSZ * 4)) \
+       || echo "Start sections do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 4)) "$TESTDIR/file2" \
+		$((BLKSZ * 4)) $((BLKSZ * 2)) \
+       || echo "Middle sections do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" $((BLKSZ * 6)) "$TESTDIR/file2" \
+		$((BLKSZ * 6)) $((BLKSZ * 2)) \
+       || 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..424d039
--- /dev/null
+++ b/tests/generic/807.out
@@ -0,0 +1,12 @@ 
+QA output created by 807
+Create the original files
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-807/file1
+5e3501f97fd2669babfcbd3e1972e833  TEST_DIR/test-807/file2
+Files 1-2 do not match (intentional)
+(Fail to) dedupe the middle blocks together
+Compare sections
+35ac8d7917305c385c30f3d82c30a8f6  TEST_DIR/test-807/file1
+5e3501f97fd2669babfcbd3e1972e833  TEST_DIR/test-807/file2
+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..667a79e
--- /dev/null
+++ b/tests/generic/817
@@ -0,0 +1,128 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_reflink
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 0 $((BLKSZ + 37)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((BLKSZ + 37)) "$TESTDIR/file2" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ + 37)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ + 37)) "$TESTDIR/file4" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+C1="$(_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}" = "${C4}" || echo "file3 and file4 should match"
+
+echo "Reflink the last blocks together, 1-2 1-3"
+_reflink_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file2" $BLKSZ 37 >> "$seqres.full"
+_reflink_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file3" $BLKSZ 37 >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+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}" != "${C4}" || echo "file3 and file4 should match"
+
+echo "Compare sections"
+_compare_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file2" $BLKSZ 37 \
+       || echo "End sections of files 1-2 do not match"
+
+_compare_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file3" $BLKSZ 37 \
+       || echo "End sections of files 1-3 do not match"
+
+_compare_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file4" $BLKSZ 37 \
+       || echo "End sections of files 1-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" $BLKSZ "$TESTDIR/file3" $BLKSZ 37 \
+       || echo "End sections of files 2-3 do not match"
+
+_compare_range "$TESTDIR/file2" $BLKSZ "$TESTDIR/file4" $BLKSZ 37 \
+       || echo "End sections of files 2-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file3" $BLKSZ "$TESTDIR/file4" $BLKSZ 37 \
+       || 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..dd6b1ee
--- /dev/null
+++ b/tests/generic/817.out
@@ -0,0 +1,16 @@ 
+QA output created by 817
+Create the original files
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-817/file1
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-817/file2
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-817/file3
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-817/file4
+Reflink the last blocks together, 1-2 1-3
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-817/file1
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-817/file2
+e236f2fe789f0aa34b50e981a2f0243a  TEST_DIR/test-817/file3
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-817/file4
+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..fba097d
--- /dev/null
+++ b/tests/generic/818
@@ -0,0 +1,128 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_dedupe
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original files"
+BLKSZ=65536
+_pwrite_byte 0x61 0 $((BLKSZ + 37)) "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((BLKSZ + 37)) "$TESTDIR/file2" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ + 37)) "$TESTDIR/file3" >> "$seqres.full"
+_pwrite_byte 0x62 0 $((BLKSZ + 37)) "$TESTDIR/file4" >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+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"
+_dedupe_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file2" $BLKSZ 37 >> "$seqres.full"
+_dedupe_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file3" $BLKSZ 37 >> "$seqres.full"
+_test_remount
+
+md5sum "$TESTDIR/file1" | _filter_test_dir
+md5sum "$TESTDIR/file2" | _filter_test_dir
+md5sum "$TESTDIR/file3" | _filter_test_dir
+md5sum "$TESTDIR/file4" | _filter_test_dir
+
+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"
+_compare_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file2" $BLKSZ 37 \
+       || echo "End sections of files 1-2 do not match"
+
+_compare_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file3" $BLKSZ 37 \
+       || echo "End sections of files 1-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file4" $BLKSZ 37 \
+       || echo "End sections of files 1-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" $BLKSZ "$TESTDIR/file3" $BLKSZ 37 \
+       || echo "End sections of files 2-3 do not match (intentional)"
+
+_compare_range "$TESTDIR/file2" $BLKSZ "$TESTDIR/file4" $BLKSZ 37 \
+       || echo "End sections of files 2-4 do not match (intentional)"
+
+_compare_range "$TESTDIR/file3" $BLKSZ "$TESTDIR/file4" $BLKSZ 37 \
+       || 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..f7e30bf
--- /dev/null
+++ b/tests/generic/818.out
@@ -0,0 +1,17 @@ 
+QA output created by 818
+Create the original files
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-818/file1
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-818/file2
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-818/file3
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-818/file4
+Dedupe the last blocks together
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-818/file1
+c4fd505be25a0c91bcca9f502b9a8156  TEST_DIR/test-818/file2
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-818/file3
+07ac67bf7f271195442509e79cde4cee  TEST_DIR/test-818/file4
+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..918868a
--- /dev/null
+++ b/tests/generic/819
@@ -0,0 +1,131 @@ 
+#! /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
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_require_test_reflink
+_require_test_dedupe
+_require_xfs_io_command "falloc"
+
+rm -f "$seqres.full"
+
+TESTDIR="$TEST_DIR/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original file blocks"
+BLKSZ=65536
+_pwrite_byte 0x61 0 $BLKSZ "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 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 $((NR_BLKS / 3)) | while read nr; do
+	_reflink_range "$TESTDIR/file1" 0 "$TESTDIR/file1" $((nr * 3 * BLKSZ)) \
+			$BLKSZ >> "$seqres.full"
+done
+
+echo "Reflink block one to the fives"
+seq 1 $((NR_BLKS / 5)) | while read nr; do
+	_reflink_range "$TESTDIR/file1" $BLKSZ "$TESTDIR/file1" \
+			$((nr * 5 * BLKSZ)) $BLKSZ >> "$seqres.full"
+done
+
+echo "Dedupe block two to the sevens"
+seq 1 $((NR_BLKS / 7)) | while read nr; do
+	_dedupe_range "$TESTDIR/file1" $((BLKSZ * 2)) "$TESTDIR/file1" \
+			$((nr * 7 * BLKSZ)) $BLKSZ >> "$seqres.full"
+done
+
+_test_remount
+
+echo "Check block mappings"
+md5sum "$TESTDIR/file1" | _filter_test_dir
+
+crcZ=$(_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..203275d
--- /dev/null
+++ b/tests/generic/819.out
@@ -0,0 +1,8 @@ 
+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
+2ea37912bdbd71b9ed4734d3141cbe9c  TEST_DIR/test-819/file1
diff --git a/tests/generic/group b/tests/generic/group
index d9421c5..7f25037 100644
--- a/tests/generic/group
+++ b/tests/generic/group
@@ -211,3 +211,11 @@ 
 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