iotests: Add iotests.image_size

This retrieves the virtual size of the image out of qemu-img info. Signed-off-by: Fam Zheng <[email protected]> Reviewed-by: Max Reitz <[email protected]> Reviewed-by: Jeff Cody <[email protected]> Signed-off-by: Kevin Wolf <[email protected]>
xDIMOx · Apr 20, 2016 · 74f6905 · 74f6905
1 parent 4150ae6
commit 74f6905
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/tests/qemu-iotests/iotests.py b/tests/qemu-iotests/iotests.py
@@ -28,6 +28,7 @@
 import qmp
 import qtest
 import struct
+import json
 
 
 # This will not work if arguments contain spaces but is necessary if we
@@ -103,6 +104,11 @@ def create_image(name, size):
         i = i + 512
     file.close()
 
+def image_size(img):
+    '''Return image's virtual size'''
+    r = qemu_img_pipe('info', '--output=json', '-f', imgfmt, img)
+    return json.loads(r)['virtual-size']
+
 test_dir_re = re.compile(r"%s" % test_dir)
 def filter_test_dir(msg):
     return test_dir_re.sub("TEST_DIR", msg)