Merge "Add traffic control constants"

neutron_lib/constants.py

@@ -12,7 +12,6 @@
 # implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
 # TODO(salv-orlando): Verify if a single set of operational
 # status constants is achievable
 NET_STATUS_ACTIVE = 'ACTIVE'
@@ -334,6 +333,17 @@ VALID_DIRECTIONS = (INGRESS_DIRECTION, EGRESS_DIRECTION)
 
 PROVISIONAL_IPV6_PD_PREFIX = '::/64'
 
+# Traffic control
+TC_QDISC_TYPE_HTB = 'htb'
+TC_QDISC_TYPE_TBF = 'tbf'
+TC_QDISC_TYPE_INGRESS = 'ingress'
+TC_QDISC_TYPES = (TC_QDISC_TYPE_HTB, TC_QDISC_TYPE_TBF, TC_QDISC_TYPE_INGRESS)
+
+TC_QDISC_INGRESS_ID = 'ffff:'
+
+TC_QDISC_PARENTS = {'root': 0xffffffff,
+                    'ingress': 0xfffffff1}
+
 
 class Sentinel(object):
     """A constant object that does not change even when copied."""

releasenotes/notes/traffic-control-constants-b8120d1bea0681bf.yaml

@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    Adds traffic control related constants:
+
+    * Qdisc types: ``htb``, ``tbf`` and ``ingress``, used in Neutron ``tc_lib``
+    * Qdisc ID: for ``ingress`` type, because this one is specific only for
+      ingress traffic.
+    * Qdisc parents: for ``root`` and ``ingress`` types.