xfs: test getbmapx shared extent reporting

Test that getbmapx returns exact shared extents.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

tests/xfs/280

@@ -0,0 +1,93 @@
+#! /bin/bash
+# FS QA Test No. 280
+#
+# Check that GETBMAPX accurately report shared extents.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2016 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 7 15
+
+_cleanup()
+{
+	cd /
+	rm -rf $tmp.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# real QA test starts here
+_supported_os Linux
+_supported_fs xfs
+_require_scratch_reflink
+_require_xfs_io_command "bmap"
+
+echo "Format and mount"
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+testdir=$SCRATCH_MNT/test-$seq
+mkdir $testdir
+
+blocks=5
+blksz=65536
+sz=$((blocks * blksz))
+
+echo "Create the original files"
+$XFS_IO_PROG -f -c "falloc 0 $sz" $testdir/file1 >> $seqres.full
+_pwrite_byte 0x61 0 $sz $testdir/file1 >> $seqres.full
+_scratch_cycle_mount
+
+bmap() {
+	$XFS_IO_PROG -c 'bmap -v' $1 | grep '^[[:space:]]*[0-9]*:'
+}
+
+echo "file1 extents and holes"
+bmap $testdir/file1 | grep -v -c hole
+bmap $testdir/file1 | grep -c hole
+
+_reflink_range $testdir/file1 $blksz $testdir/file2 $((blksz * 3)) $blksz >> $seqres.full
+_reflink_range $testdir/file1 $((blksz * 3)) $testdir/file2 $blksz $blksz >> $seqres.full
+_scratch_cycle_mount
+
+echo "Compare files"
+md5sum $testdir/file1 | _filter_scratch
+md5sum $testdir/file2 | _filter_scratch
+
+echo "file1 extents and holes"
+bmap $testdir/file1 | grep -v -c hole
+bmap $testdir/file1 | grep -c hole
+echo "file2 extents and holes"
+bmap $testdir/file2 | grep -v -c hole
+bmap $testdir/file2 | grep -c hole
+echo "file1 shared extents"
+bmap $testdir/file1 | grep -c '1.....$'
+
+# success, all done
+status=0
+exit

tests/xfs/280.out

@@ -0,0 +1,17 @@
+QA output created by 280
+Format and mount
+Create the original files
+file1 extents and holes
+1
+0
+Compare files
+17af09af790a9b4c79cddf72f6b642cb  SCRATCH_MNT/test-280/file1
+79418df9c55ab7f58781cb7b9e7d5d91  SCRATCH_MNT/test-280/file2
+file1 extents and holes
+5
+0
+file2 extents and holes
+2
+2
+file1 shared extents
+2

tests/xfs/group

@@ -277,6 +277,7 @@
 277 auto quick rmap fsmap
 278 repair auto
 279 auto mkfs
+280 auto quick clone
 281 dump ioctl auto quick
 282 dump ioctl auto quick
 283 dump ioctl auto quick