Allow EC2 to list images based on owner

doc/topics/cloud/aws.rst

@@ -418,6 +418,36 @@ configuration file:
       rename_on_destroy: True
 
 
+Listing Images
+==============
+Normally, images can be queried on a cloud provider by passing the
+``--list-images`` argument to Salt Cloud. This still holds true for EC2:
+
+.. code-block:: bash
+
+    salt-cloud --list-images my-ec2-config
+
+However, the full list of images on EC2 is extremely large, and querying all of
+the available images may cause Salt Cloud to behave as if frozen. Therefore,
+the default behavior of this option may be modified, by adding an ``owner``
+argument to the provider configuration:
+
+.. code-block:: yaml
+
+    owner: aws-marketplace
+
+The possible values for this setting are ``amazon``, ``aws-marketplace``,
+``self``, ``<AWS account ID>`` or ``all``. The default setting is ``amazon``.
+
+It is also possible to perform this query using different settings without
+modifying the configuration files. To do this, call the ``avail_images``
+function directly:
+
+.. code-block:: bash
+
+    salt-cloud -f avail_images my-ec2-config owner=aws-marketplace
+
+
 EC2 Images
 ==========
 The following are lists of available AMI images, generally sorted by OS. These

salt/cloud/clouds/ec2.py

@@ -530,12 +530,25 @@ def avail_sizes():
     return sizes
 
 
-def avail_images():
+def avail_images(kwargs=None, call=None):
     '''
     Return a dict of all available VM images on the cloud provider.
     '''
+    if type(kwargs) is not dict:
+        kwargs = {}
+
+    if 'owner' in kwargs:
+        owner = kwargs['owner']
+    else:
+        provider = get_configured_provider()
+
+        owner = config.get_cloud_config_value(
+            'owner', provider, __opts__, default='amazon'
+        )
+
     ret = {}
-    params = {'Action': 'DescribeImages'}
+    params = {'Action': 'DescribeImages',
+              'Owner': owner}
     images = query(params)
     for image in images:
         ret[image['imageId']] = image