From f8b63272ff00d09cde40ee86f3357308cab53e00 Mon Sep 17 00:00:00 2001
From: Rodolfo Alonso Hernandez <ralonsoh@redhat.com>
Date: Wed, 30 Jan 2019 14:02:43 +0000
Subject: [PATCH] Add traffic control constants

Change-Id: If1902521086341f1f3786241509a000eaffe72b2
Related-Bug: #1560963
---
 neutron_lib/constants.py                             | 12 +++++++++++-
 .../traffic-control-constants-b8120d1bea0681bf.yaml  |  9 +++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100644 releasenotes/notes/traffic-control-constants-b8120d1bea0681bf.yaml

diff --git a/neutron_lib/constants.py b/neutron_lib/constants.py
index 50e3d9277..612cb6665 100644
--- a/neutron_lib/constants.py
+++ b/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'
@@ -333,6 +332,17 @@ 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."""
diff --git a/releasenotes/notes/traffic-control-constants-b8120d1bea0681bf.yaml b/releasenotes/notes/traffic-control-constants-b8120d1bea0681bf.yaml
new file mode 100644
index 000000000..0736af328
--- /dev/null
+++ b/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.