qemu-img: Add tests for raw image preallocation

Add tests for creating raw image with and without the preallocation
option.

Signed-off-by: Nir Soffer <nirsof@gmail.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

tests/qemu-iotests/175

@@ -0,0 +1,61 @@
+#!/bin/bash
+#
+# Test creating raw image preallocation mode
+#
+# Copyright (C) 2017 Nir Soffer <nirsof@gmail.com>
+#
+# 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; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will 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, see <http://www.gnu.org/licenses/>.
+#
+
+# creator
+owner=nirsof@gmail.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+here=`pwd`
+status=1	# failure is the default!
+
+_cleanup()
+{
+	_cleanup_test_img
+}
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+# get standard environment, filters and checks
+. ./common.rc
+. ./common.filter
+
+_supported_fmt raw
+_supported_proto file
+_supported_os Linux
+
+size=1m
+
+echo
+echo "== creating image with default preallocation =="
+_make_test_img $size | _filter_imgfmt
+stat -c "size=%s, blocks=%b" $TEST_IMG
+
+for mode in off full falloc; do
+    echo
+    echo "== creating image with preallocation $mode =="
+    IMGOPTS=preallocation=$mode _make_test_img $size | _filter_imgfmt
+    stat -c "size=%s, blocks=%b" $TEST_IMG
+done
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0

tests/qemu-iotests/175.out

@@ -0,0 +1,18 @@
+QA output created by 175
+
+== creating image with default preallocation ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
+size=1048576, blocks=0
+
+== creating image with preallocation off ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=off
+size=1048576, blocks=0
+
+== creating image with preallocation full ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=full
+size=1048576, blocks=2048
+
+== creating image with preallocation falloc ==
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576 preallocation=falloc
+size=1048576, blocks=2048
+ *** done

tests/qemu-iotests/group

@@ -167,3 +167,4 @@
 172 auto
 173 rw auto
 174 auto
+175 auto quick