[ovs-dev] [PATCH ovn v8 8/8] ovn-controller: Handle sbrec_chassis changes incrementally.

numans at ovn.org numans at ovn.org
Tue May 26 12:29:07 UTC 2020


From: Numan Siddique <numans at ovn.org>

When ovn-controller updates the nb_cfg column of its chassis,
this results in full recomputation on all the nodes. This results
in wastage of CPU cycles. To address this, this patch handles
sbrec_chassis changes incrementally.

We don't need to handle any sbrec_chassis changes during runtime_data
stage, because before engine_run() is called, encaps_run() is called
which will handle any chassis/encap changes.

For new chassis addition and deletion, we need to add/delete flows for
the tunnel ports created/deleted. So physical_run() is called for this.

For any chassis updates, we can ignore this for flow computation.

This patch handles all these.

Acked-by: Mark Michelson <mmichels at redhat.com>
Signed-off-by: Numan Siddique <numans at ovn.org>
---
 controller/ovn-controller.c | 53 ++++++++++++++++++++++++++++++-------
 1 file changed, 43 insertions(+), 10 deletions(-)

diff --git a/controller/ovn-controller.c b/controller/ovn-controller.c
index 5e9e0c62b..50c4f684c 100644
--- a/controller/ovn-controller.c
+++ b/controller/ovn-controller.c
@@ -1443,7 +1443,8 @@ static void init_physical_ctx(struct engine_node *node,
 
     struct sbrec_chassis_table *chassis_table =
         (struct sbrec_chassis_table *)EN_OVSDB_GET(
-            engine_get_input("SB_chassis", node));
+            engine_get_input("SB_chassis",
+                engine_get_input("physical_flow_changes", node)));
 
     struct ed_type_mff_ovn_geneve *ed_mff_ovn_geneve =
         engine_get_input_data("mff_ovn_geneve", node);
@@ -1459,7 +1460,8 @@ static void init_physical_ctx(struct engine_node *node,
     const struct sbrec_chassis *chassis = NULL;
     struct ovsdb_idl_index *sbrec_chassis_by_name =
         engine_ovsdb_node_get_index(
-                engine_get_input("SB_chassis", node),
+                engine_get_input("SB_chassis",
+                    engine_get_input("physical_flow_changes", node)),
                 "name");
     if (chassis_id) {
         chassis = chassis_lookup_by_name(sbrec_chassis_by_name, chassis_id);
@@ -1536,7 +1538,8 @@ static void init_lflow_ctx(struct engine_node *node,
     const struct sbrec_chassis *chassis = NULL;
     struct ovsdb_idl_index *sbrec_chassis_by_name =
         engine_ovsdb_node_get_index(
-                engine_get_input("SB_chassis", node),
+            engine_get_input("SB_chassis",
+                engine_get_input("physical_flow_changes", node)),
                 "name");
     if (chassis_id) {
         chassis = chassis_lookup_by_name(sbrec_chassis_by_name, chassis_id);
@@ -1617,8 +1620,9 @@ en_flow_output_run(struct engine_node *node, void *data)
 
     struct ovsdb_idl_index *sbrec_chassis_by_name =
         engine_ovsdb_node_get_index(
-                engine_get_input("SB_chassis", node),
-                "name");
+            engine_get_input("SB_chassis",
+                engine_get_input("physical_flow_changes", node)),
+            "name");
 
     const struct sbrec_chassis *chassis = NULL;
     if (chassis_id) {
@@ -1783,8 +1787,9 @@ _flow_output_resource_ref_handler(struct engine_node *node, void *data,
 
     struct ovsdb_idl_index *sbrec_chassis_by_name =
         engine_ovsdb_node_get_index(
-                engine_get_input("SB_chassis", node),
-                "name");
+            engine_get_input("SB_chassis",
+                engine_get_input("physical_flow_changes", node)),
+            "name");
     const struct sbrec_chassis *chassis = NULL;
     if (chassis_id) {
         chassis = chassis_lookup_by_name(sbrec_chassis_by_name, chassis_id);
@@ -1956,6 +1961,31 @@ physical_flow_changes_ovs_iface_handler(struct engine_node *node,
     return true;
 }
 
+/* Handles sbrec_chassis changes.
+ * If a new chassis is added or removed return false, so that
+ * physical flows are programmed.
+ * For any updates, there is no need for any flow computation.
+ * Encap changes will also result in sbrec_chassis changes,
+ * but we handle encap changes separately.
+ */
+static bool
+physical_flow_changes_sb_chassis_handler(struct engine_node *node OVS_UNUSED,
+                                         void *data OVS_UNUSED)
+{
+    struct sbrec_chassis_table *chassis_table =
+        (struct sbrec_chassis_table *)EN_OVSDB_GET(
+            engine_get_input("SB_chassis", node));
+
+    const struct sbrec_chassis *ch;
+    SBREC_CHASSIS_TABLE_FOR_EACH_TRACKED (ch, chassis_table) {
+        if (sbrec_chassis_is_deleted(ch) || sbrec_chassis_is_new(ch)) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
 static bool
 flow_output_physical_flow_changes_handler(struct engine_node *node, void *data)
 {
@@ -2205,6 +2235,10 @@ main(int argc, char *argv[])
                      NULL);
     engine_add_input(&en_physical_flow_changes, &en_ovs_interface,
                      physical_flow_changes_ovs_iface_handler);
+    engine_add_input(&en_physical_flow_changes, &en_sb_chassis,
+                     physical_flow_changes_sb_chassis_handler);
+    engine_add_input(&en_physical_flow_changes, &en_sb_encap,
+                     NULL);
 
     engine_add_input(&en_flow_output, &en_addr_sets,
                      flow_output_addr_sets_handler);
@@ -2224,8 +2258,6 @@ main(int argc, char *argv[])
     engine_add_input(&en_flow_output, &en_ovs_open_vswitch, NULL);
     engine_add_input(&en_flow_output, &en_ovs_bridge, NULL);
 
-    engine_add_input(&en_flow_output, &en_sb_chassis, NULL);
-    engine_add_input(&en_flow_output, &en_sb_encap, NULL);
     engine_add_input(&en_flow_output, &en_sb_multicast_group,
                      flow_output_sb_multicast_group_handler);
     engine_add_input(&en_flow_output, &en_sb_port_binding,
@@ -2252,7 +2284,8 @@ main(int argc, char *argv[])
                      runtime_data_ovs_interface_handler);
     engine_add_input(&en_runtime_data, &en_ovs_qos, NULL);
 
-    engine_add_input(&en_runtime_data, &en_sb_chassis, NULL);
+    engine_add_input(&en_runtime_data, &en_sb_chassis,
+                     runtime_data_noop_handler);
     engine_add_input(&en_runtime_data, &en_sb_datapath_binding,
                      runtime_data_sb_datapath_binding_handler);
     engine_add_input(&en_runtime_data, &en_sb_port_binding,
-- 
2.26.2



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