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authorKevin Wolf <kwolf@redhat.com>2013-05-13 14:00:15 +0200
committerStefan Hajnoczi <stefanha@redhat.com>2013-05-24 16:17:55 +0200
commitc93331c9146719958a4b102435fcd0566da45ea2 (patch)
treec288336dec27bb40dc2af65e5d16ce02e1156de7 /tests
parenta00e81e98f71c91a35b96bcd8ae431a86f42378d (diff)
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qcow2.py: Subcommand for changing header fields
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'tests')
-rwxr-xr-xtests/qemu-iotests/qcow2.py17
1 files changed, 17 insertions, 0 deletions
diff --git a/tests/qemu-iotests/qcow2.py b/tests/qemu-iotests/qcow2.py
index fecf5b9..44a2b45 100755
--- a/tests/qemu-iotests/qcow2.py
+++ b/tests/qemu-iotests/qcow2.py
@@ -149,6 +149,22 @@ def cmd_dump_header(fd):
h.dump()
h.dump_extensions()
+def cmd_set_header(fd, name, value):
+ try:
+ value = int(value, 0)
+ except:
+ print "'%s' is not a valid number" % value
+ sys.exit(1)
+
+ fields = (field[2] for field in QcowHeader.fields)
+ if not name in fields:
+ print "'%s' is not a known header field" % name
+ sys.exit(1)
+
+ h = QcowHeader(fd)
+ h.__dict__[name] = value
+ h.update(fd)
+
def cmd_add_header_ext(fd, magic, data):
try:
magic = int(magic, 0)
@@ -205,6 +221,7 @@ def cmd_set_feature_bit(fd, group, bit):
cmds = [
[ 'dump-header', cmd_dump_header, 0, 'Dump image header and header extensions' ],
+ [ 'set-header', cmd_set_header, 2, 'Set a field in the header'],
[ 'add-header-ext', cmd_add_header_ext, 2, 'Add a header extension' ],
[ 'del-header-ext', cmd_del_header_ext, 1, 'Delete a header extension' ],
[ 'set-feature-bit', cmd_set_feature_bit, 2, 'Set a feature bit'],