[PATCH 09/11] xfs: test xfs-specific reflink pieces

Darrick J. Wong
2015-11-11T19:28:05Z

Check that growfs and xfs_fsr still work properly on reflinked fses.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
tests/xfs/800 | 79 ++++++++++++++++++++++++++++
tests/xfs/800.out | 6 ++
tests/xfs/801 | 148 +++++++++++++++++++++++++++++++++++++++++++++++++++++
tests/xfs/801.out | 27 ++++++++++
tests/xfs/802 | 87 +++++++++++++++++++++++++++++++
tests/xfs/802.out | 6 ++
tests/xfs/803 | 109 +++++++++++++++++++++++++++++++++++++++
tests/xfs/803.out | 13 +++++
tests/xfs/804 | 77 ++++++++++++++++++++++++++++
tests/xfs/804.out | 0
tests/xfs/group | 5 ++
11 files changed, 557 insertions(+)
create mode 100755 tests/xfs/800
create mode 100644 tests/xfs/800.out
create mode 100755 tests/xfs/801
create mode 100644 tests/xfs/801.out
create mode 100755 tests/xfs/802
create mode 100644 tests/xfs/802.out
create mode 100755 tests/xfs/803
create mode 100644 tests/xfs/803.out
create mode 100755 tests/xfs/804
create mode 100644 tests/xfs/804.out

diff --git a/tests/xfs/800 b/tests/xfs/800
new file mode 100755
index 0000000..d9fe5b4
--- /dev/null
+++ b/tests/xfs/800
@@ -0,0 +1,79 @@
+#! /bin/bash
+# FS QA Test No. 800
+#
+# Tests xfs_growfs on a reflinked filesystem
+#
+#-----------------------------------------------------------------------
+# 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 -f "$tmp".*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_cp_reflink
+
+echo "Format and mount"
+_scratch_mkfs -d size=$((2 * 4096 * 4096)) -l size=4194304 > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original file and reflink to copy1, copy2"
+BLKSZ="$(stat -f "$TESTDIR" -c '%S')"
+_pwrite_byte 0x61 0 $((BLKSZ * 14 + 71)) "$TESTDIR/original" >> "$seqres.full"
+_cp_reflink "$TESTDIR/original" "$TESTDIR/copy1"
+_cp_reflink "$TESTDIR/copy1" "$TESTDIR/copy2"
+
+echo "Grow fs"
+"$XFS_GROWFS_PROG" "$SCRATCH_MNT" 2>&1 | _filter_growfs >> "$seqres.full"
+_scratch_remount
+
+echo "Create more reflink copies"
+_cp_reflink "$TESTDIR/original" "$TESTDIR/copy3"
+
+xfs_info "$SCRATCH_MNT" >> "$seqres.full"
+
+echo "Check scratch fs"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/800.out b/tests/xfs/800.out
new file mode 100644
index 0000000..73d4f71
--- /dev/null
+++ b/tests/xfs/800.out
@@ -0,0 +1,6 @@
+QA output created by 800
+Format and mount
+Create the original file and reflink to copy1, copy2
+Grow fs
+Create more reflink copies
+Check scratch fs
diff --git a/tests/xfs/801 b/tests/xfs/801
new file mode 100755
index 0000000..172fb29
--- /dev/null
+++ b/tests/xfs/801
@@ -0,0 +1,148 @@
+#! /bin/bash
+# FS QA Test No. 801
+#
+# Ensure that xfs_fsr un-reflinks files while defragmenting
+#
+#-----------------------------------------------------------------------
+# 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 -f "$tmp".*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_cp_reflink
+
+echo "Format and mount"
+_scratch_mkfs > "$seqres.full" 2>&1
+_scratch_mount >> "$seqres.full" 2>&1
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+FREE_BLOCKS0=$(stat -f "$TESTDIR" -c '%f')
+
+echo "Create the original file and reflink to file2, file3"
+BLKS=2000
+MARGIN=100
+BLKSZ=65536
+REAL_BLKSZ="$(stat -f $TESTDIR -c '%S')"
+BLKSZ_FACTOR=$((BLKSZ / REAL_BLKSZ))
+_pwrite_byte 0x61 0 $((BLKS * BLKSZ)) "$TESTDIR/file1" >> "$seqres.full"
+_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2"
+_cp_reflink "$TESTDIR/file2" "$TESTDIR/file3"
+_cp_reflink "$TESTDIR/file3" "$TESTDIR/file4"
+_test_remount
+FREE_BLOCKS1=$(stat -f "$TESTDIR" -c '%f')
+
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file4" | _filter_scratch
+
+C01=$(_md5_checksum "$TESTDIR/file1")
+C02=$(_md5_checksum "$TESTDIR/file2")
+C03=$(_md5_checksum "$TESTDIR/file3")
+C04=$(_md5_checksum "$TESTDIR/file4")
+
+echo "CoW the reflink copies"
+_pwrite_byte 0x62 $BLKSZ $BLKSZ "$TESTDIR/file2" >> "$seqres.full"
+_pwrite_byte 0x63 $(( BLKSZ * (BLKS - 1) )) $BLKSZ "$TESTDIR/file3" >> "$seqres.full"
+_test_remount
+FREE_BLOCKS2=$(stat -f "$TESTDIR" -c '%f')
+
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file4" | _filter_scratch
+
+C11=$(_md5_checksum "$TESTDIR/file1")
+C12=$(_md5_checksum "$TESTDIR/file2")
+C13=$(_md5_checksum "$TESTDIR/file3")
+C14=$(_md5_checksum "$TESTDIR/file4")
+
+echo "Defragment"
+lsattr -l "$TESTDIR/" | _filter_scratch
+xfs_fsr -v -d "$TESTDIR/file1" >> "$seqres.full"
+xfs_fsr -v -d "$TESTDIR/file2" >> "$seqres.full" # fsr probably breaks the link
+xfs_fsr -v -d "$TESTDIR/file3" >> "$seqres.full" # fsr probably breaks the link
+xfs_fsr -v -d "$TESTDIR/file4" >> "$seqres.full" # fsr probably ignores this file
+_test_remount
+FREE_BLOCKS3=$(stat -f "$TESTDIR" -c '%f')
+
+md5sum "$TESTDIR/file1" | _filter_scratch
+md5sum "$TESTDIR/file2" | _filter_scratch
+md5sum "$TESTDIR/file3" | _filter_scratch
+md5sum "$TESTDIR/file4" | _filter_scratch
+
+C21=$(_md5_checksum "$TESTDIR/file1")
+C22=$(_md5_checksum "$TESTDIR/file2")
+C23=$(_md5_checksum "$TESTDIR/file3")
+C24=$(_md5_checksum "$TESTDIR/file4")
+
+echo "Check files"
+test $C01 = $C02 || echo "Files 1-2 do not match"
+test $C01 = $C03 || echo "Files 1-3 do not match"
+test $C01 = $C04 || echo "Files 1-4 do not match"
+test $C02 = $C03 || echo "Files 2-3 do not match"
+test $C02 = $C04 || echo "Files 2-4 do not match"
+test $C03 = $C04 || echo "Files 3-4 do not match"
+
+test $C01 = $C11 || echo "File1 should not be different after CoW"
+test $C02 != $C12 || echo "File2 should be different after CoW"
+test $C03 != $C13 || echo "File3 should be different after CoW"
+test $C04 = $C14 || echo "File4 should not be different after CoW"
+
+test $C11 = $C21 || echo "File1 changed by defrag"
+test $C12 = $C22 || echo "File2 changed by defrag"
+test $C13 = $C23 || echo "File3 changed by defrag"
+test $C14 = $C24 || echo "File4 changed by defrag"
+
+#echo $FREE_BLOCKS0 $FREE_BLOCKS1 $FREE_BLOCKS2 $FREE_BLOCKS3
+
+_within_tolerance "free blocks after creating some reflink copies" $FREE_BLOCKS1 $((FREE_BLOCKS0 - (BLKS * BLKSZ_FACTOR) )) $MARGIN -v
+_within_tolerance "free blocks after CoW some reflink copies" $FREE_BLOCKS2 $((FREE_BLOCKS1 - 2)) $MARGIN -v
+_within_tolerance "free blocks after defragging all reflink copies" $FREE_BLOCKS3 $((FREE_BLOCKS2 - (BLKS * 2 * BLKSZ_FACTOR))) $MARGIN -v
+_within_tolerance "free blocks after all tests" $FREE_BLOCKS3 $((FREE_BLOCKS0 - (BLKS * 3 * BLKSZ_FACTOR))) $MARGIN -v
+
+echo "Check scratch fs"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/801.out b/tests/xfs/801.out
new file mode 100644
index 0000000..4733f18
--- /dev/null
+++ b/tests/xfs/801.out
@@ -0,0 +1,27 @@
+QA output created by 801
+Format and mount
+Create the original file and reflink to file2, file3
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file1
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file2
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file3
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file4
+CoW the reflink copies
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file1
+c650f1cf6c9f07b22e3e21ec7d49ded5 SCRATCH_MNT/test-801/file2
+56ed2f712c91e035adeeb26ed105a982 SCRATCH_MNT/test-801/file3
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file4
+Defragment
+SCRATCH_MNT/test-801/file1 ---
+SCRATCH_MNT/test-801/file2 ---
+SCRATCH_MNT/test-801/file3 ---
+SCRATCH_MNT/test-801/file4 ---
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file1
+c650f1cf6c9f07b22e3e21ec7d49ded5 SCRATCH_MNT/test-801/file2
+56ed2f712c91e035adeeb26ed105a982 SCRATCH_MNT/test-801/file3
+b81534f439aac5c34ce3ed60a03eba70 SCRATCH_MNT/test-801/file4
+Check files
+free blocks after creating some reflink copies is in range
+free blocks after CoW some reflink copies is in range
+free blocks after defragging all reflink copies is in range
+free blocks after all tests is in range
+Check scratch fs
diff --git a/tests/xfs/802 b/tests/xfs/802
new file mode 100755
index 0000000..f63ef14
--- /dev/null
+++ b/tests/xfs/802
@@ -0,0 +1,87 @@
+#! /bin/bash
+# FS QA Test No. 802
+#
+# Ensure that we can create enough distinct reflink entries to force creation
+# of a multi-level refcount btree, and that metadump will successfully copy
+# said block.
+#
+#-----------------------------------------------------------------------
+# 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 /
+ umount "$SCRATCH_MNT" > /dev/null 2>&1
+ rm -rf "$tmp".* "$TESTDIR" "$METADUMP_FILE"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+
+rm -f "$seqres.full"
+
+_scratch_mkfs >/dev/null 2>&1
+_scratch_mount
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+METADUMP_FILE="$TEST_DIR/${seq}_metadump"
+
+echo "Create the original file blocks"
+BLKSZ="$(stat -f "$TESTDIR" -c '%S')"
+NR_BLKS=$((4 * BLKSZ / 12))
+_pwrite_byte 0x61 0 $((BLKSZ * NR_BLKS)) "$TESTDIR/file1" >> "$seqres.full"
+
+echo "Reflink every other block"
+seq 1 $((NR_BLKS / 2)) | while read nr; do
+ _reflink_range "$TESTDIR/file1" $((nr * 2 * BLKSZ)) \
+ "$TESTDIR/file2" $((nr * 2 * BLKSZ)) $BLKSZ >> "$seqres.full"
+done
+
+echo "Create metadump file"
+_scratch_unmount
+_scratch_metadump "$METADUMP_FILE"
+
+# Now restore the obfuscated one back and take a look around
+echo "Restore metadump"
+xfs_mdrestore "$METADUMP_FILE" "$TEST_DIR/image"
+_mount -t $FSTYP "$TEST_DIR/image" "$SCRATCH_MNT"
+umount "$SCRATCH_MNT"
+
+echo "Check restored fs"
+_check_generic_filesystem "$METADUMP_FILE"
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/802.out b/tests/xfs/802.out
new file mode 100644
index 0000000..ad2ef03
--- /dev/null
+++ b/tests/xfs/802.out
@@ -0,0 +1,6 @@
+QA output created by 802
+Create the original file blocks
+Reflink every other block
+Create metadump file
+Restore metadump
+Check restored fs
diff --git a/tests/xfs/803 b/tests/xfs/803
new file mode 100755
index 0000000..4aed2e1
--- /dev/null
+++ b/tests/xfs/803
@@ -0,0 +1,109 @@
+#! /bin/bash
+# FS QA Test No. 803
+#
+# Create and populate an XFS filesystem, corrupt the refcount btree,
+# then see how the kernel and xfs_repair deal with it.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2015 Oracle, Inc. 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 -f $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/attr
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_cp_reflink
+test -n "${FORCE_FUZZ}" || _require_scratch_xfs_crc
+
+rm -f "$seqres.full"
+
+echo "+ create scratch fs"
+_scratch_mkfs_xfs > /dev/null
+
+echo "+ mount fs image"
+_scratch_mount
+blksz="$(stat -f -c '%s' "${SCRATCH_MNT}")"
+agcount="$(xfs_info "${SCRATCH_MNT}" | grep agcount= | sed -e 's/^.*agcount=\([0-9]*\),.*$/\1/g')"
+
+echo "+ make some files"
+_pwrite_byte 0x62 0 $((blksz * 64)) "${SCRATCH_MNT}/file0" >> "$seqres.full"
+_pwrite_byte 0x61 0 $((blksz * 64)) "${SCRATCH_MNT}/file1" >> "$seqres.full"
+_cp_reflink "${SCRATCH_MNT}/file0" "${SCRATCH_MNT}/file2"
+_cp_reflink "${SCRATCH_MNT}/file1" "${SCRATCH_MNT}/file3"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs"
+_scratch_xfs_repair -n >> "$seqres.full" 2>&1 || \
+ _fail "xfs_repair should not fail"
+
+echo "+ corrupt image"
+seq 0 $((agcount - 1)) | while read ag; do
+ $XFS_DB_PROG -x -c "agf ${ag}" -c "agf ${ag}" -c "addr refcntroot" \
+ -c "stack" -c "blocktrash -x 4096 -y 4096 -z -n 8 -3" \
+ "${SCRATCH_DEV}" >> "$seqres.full" 2>&1
+done
+
+echo "+ mount image"
+_scratch_mount
+
+echo "+ reflink more"
+_cp_reflink "${SCRATCH_MNT}/file1" "${SCRATCH_MNT}/file4" 2> /dev/null && \
+ _fail "should not be able to reflink with busted refcount btree"
+umount "${SCRATCH_MNT}"
+
+echo "+ repair fs"
+_scratch_xfs_repair >> "$seqres.full" 2>&1
+_scratch_xfs_repair >> "$seqres.full" 2>&1
+
+echo "+ mount image (2)"
+_scratch_mount
+
+echo "+ chattr -R -i"
+chattr -R -f -i "${SCRATCH_MNT}/"
+
+echo "+ reflink more (2)"
+_cp_reflink "${SCRATCH_MNT}/file1" "${SCRATCH_MNT}/file5" || \
+ _fail "modified refcount tree"
+umount "${SCRATCH_MNT}"
+
+echo "+ check fs (2)"
+_scratch_xfs_repair -n >> "$seqres.full" 2>&1 || \
+ _fail "xfs_repair should not fail"
+
+status=0
+exit
diff --git a/tests/xfs/803.out b/tests/xfs/803.out
new file mode 100644
index 0000000..582682d
--- /dev/null
+++ b/tests/xfs/803.out
@@ -0,0 +1,13 @@
+QA output created by 803
++ create scratch fs
++ mount fs image
++ make some files
++ check fs
++ corrupt image
++ mount image
++ reflink more
++ repair fs
++ mount image (2)
++ chattr -R -i
++ reflink more (2)
++ check fs (2)
diff --git a/tests/xfs/804 b/tests/xfs/804
new file mode 100755
index 0000000..c46a7a0
--- /dev/null
+++ b/tests/xfs/804
@@ -0,0 +1,77 @@
+#! /bin/bash
+# FS QA Test No. 804
+#
+# Ensure that we can't reflink realtime files.
+#
+#-----------------------------------------------------------------------
+# 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 /
+ umount "$SCRATCH_MNT" > /dev/null 2>&1
+ rm -rf "$tmp".* "$TESTDIR" "$METADUMP_FILE"
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+test -b "$TEST_RTDEV" || _notrun "Need TEST_RTDEV to run this test."
+_require_scratch_reflink
+_require_cp_reflink
+
+rm -f "$seqres.full"
+
+_scratch_mkfs -r rtdev=$TEST_RTDEV >/dev/null 2>&1
+_scratch_mount -o rtdev=$TEST_RTDEV
+
+TESTDIR="$SCRATCH_MNT/test-$seq"
+rm -rf "$TESTDIR"
+mkdir "$TESTDIR"
+
+echo "Create the original file blocks"
+BLKSZ=65536
+touch "$TESTDIR/file1"
+$XFS_IO_PROG -c 'chattr +r' "$TESTDIR/file1" >> "$seqres.full"
+_pwrite_byte 0x61 0 $BLKSZ "$TESTDIR/file1" >> "$seqres.full"
+
+echo "Reflink every other block"
+_cp_reflink "$TESTDIR/file1" "$TESTDIR/file2"
+
+test -s "$TESTDIR/file2" && _fail "Should not be able to reflink a realtime file."
+
+echo "Check restored fs"
+umount "$SCRATCH_MNT"
+_check_scratch_fs
+
+# success, all done
+status=0
+exit
diff --git a/tests/xfs/804.out b/tests/xfs/804.out
new file mode 100644
index 0000000..e69de29
diff --git a/tests/xfs/group b/tests/xfs/group
index 8261f86..eccfb73 100644
--- a/tests/xfs/group
+++ b/tests/xfs/group
@@ -220,3 +220,8 @@
303 auto quick quota
304 auto quick quota
305 auto quota
+800 auto quick clone
+801 auto quick clone
+802 auto quick clone
+803 fuzzers
+804 auto quick clone