Add pagination support to Qos specs

In Liberty release, we have added pagination to backups
and snapshot. There are still some work that hasn't been
done yet.
This patch add pagination support to Qos specs.

APIImpact
DocImpact

Implements: blueprint add-pagination-to-other-resource

Change-Id: I1965c8be6b4415ff99fb50e05e77f791f3ff5942

cinder/api/contrib/qos_specs_manage.py

@@ -20,6 +20,7 @@ from oslo_utils import strutils
 import six
 import webob
 
+from cinder.api import common
 from cinder.api import extensions
 from cinder.api.openstack import wsgi
 from cinder.api.views import qos_specs as view_qos_specs
@@ -115,7 +116,20 @@ class QoSSpecsController(wsgi.Controller):
         """Returns the list of qos_specs."""
         context = req.environ['cinder.context']
         authorize(context)
-        specs = qos_specs.get_all_specs(context)
+
+        params = req.params.copy()
+
+        marker, limit, offset = common.get_pagination_params(params)
+        sort_keys, sort_dirs = common.get_sort_params(params)
+        filters = params
+        allowed_search_options = ('id', 'name', 'consumer')
+        utils.remove_invalid_filter_options(context, filters,
+                                            allowed_search_options)
+
+        specs = qos_specs.get_all_specs(context, filters=filters,
+                                        marker=marker, limit=limit,
+                                        offset=offset, sort_keys=sort_keys,
+                                        sort_dirs=sort_dirs)
         return self._view_builder.summary_list(req, specs)
 
     @wsgi.serializers(xml=QoSSpecsTemplate)