[3/4] qemu-iotest: add 310 testcase

diff --git a/tests/qemu-iotests/310 b/tests/qemu-iotests/310
new file mode 100755
index 0000000000..af9f03e91f
--- /dev/null
+++ b/tests/qemu-iotests/310
@@ -0,0 +1,104 @@ 
+#!/bin/bash
+#
+# Test falloc image creation, size and rw
+#
+# Copyright (C) 2020 Huawei, Inc
+#
+# 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=zhangshuai13@huawei.com
+
+seq=`basename $0`
+echo "QA output created by $seq"
+
+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 >/dev/null 2>&1
+. ./common.filter
+
+_supported_fmt qcow2
+_supported_proto file
+_supported_os Linux
+
+_img_info_tmp()
+{
+    if [[ "$1" == "--format-specific" ]]; then
+        local format_specific=1
+        shift
+    else
+        local format_specific=0
+    fi
+
+    discard=0
+    regex_json_spec_start='^ *"format-specific": \{'
+    $QEMU_IMG info "$@" "$TEST_IMG" 2>&1 | \
+        sed -e "s#$IMGPROTO:$TEST_DIR#TEST_DIR#g" \
+            -e "s#$TEST_DIR#TEST_DIR#g" \
+            -e "s#$IMGFMT#IMGFMT#g" \
+            -e "/actual-size/ D" | \
+        while IFS='' read line; do
+            if [[ $format_specific == 1 ]]; then
+                discard=0
+            elif [[ $line == "Format specific information:" ]]; then
+                discard=1
+            elif [[ $line =~ $regex_json_spec_start ]]; then
+                discard=2
+                regex_json_spec_end="^${line%%[^ ]*}\\},? *$"
+            fi
+            if [[ $discard == 0 ]]; then
+                echo "$line"
+            elif [[ $discard == 1 && ! $line ]]; then
+                echo
+                discard=0
+            elif [[ $discard == 2 && $line =~ $regex_json_spec_end ]]; then
+                discard=0
+            fi
+        done
+}
+
+IMGOPTS="preallocation=falloc"
+
+echo "=== Check qemu-img info output ==="
+echo
+size=64M
+
+_make_test_img $size
+_img_info_tmp | _filter_img_info
+
+echo
+echo "== reading whole image =="
+$QEMU_IO -c "read 0 $size" "$TEST_IMG" | _filter_qemu_io
+
+echo
+echo "== rewriting whole image =="
+$QEMU_IO -c "write -P 0xa 0 $size" "$TEST_IMG" | _filter_qemu_io
+
+echo
+echo "== verify pattern =="
+$QEMU_IO -c "read -P 0xa 0 $size" "$TEST_IMG" | _filter_qemu_io
+
+
+# success, all done
+echo "*** done"
+rm -f $seq.full
+status=0
diff --git a/tests/qemu-iotests/310.out b/tests/qemu-iotests/310.out
new file mode 100644
index 0000000000..dcca649360
--- /dev/null
+++ b/tests/qemu-iotests/310.out
@@ -0,0 +1,21 @@ 
+QA output created by 310
+=== Check qemu-img info output ===
+
+Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=67108864 preallocation=falloc
+image: TEST_DIR/t.IMGFMT
+file format: IMGFMT
+virtual size: 64 MiB (67108864 bytes)
+disk size: 64.3 MiB
+
+== reading whole image ==
+read 67108864/67108864 bytes at offset 0
+64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== rewriting whole image ==
+wrote 67108864/67108864 bytes at offset 0
+64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+
+== verify pattern ==
+read 67108864/67108864 bytes at offset 0
+64 MiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
+*** done
diff --git a/tests/qemu-iotests/group b/tests/qemu-iotests/group
index 632a05b25e..e8b6480890 100644
--- a/tests/qemu-iotests/group
+++ b/tests/qemu-iotests/group
@@ -317,3 +317,4 @@ 
 307 rw quick export
 308 rw auto quick
 309 rw auto quick
+310 rw auto quick