ovn: l3ha, ovn-northd gateway chassis propagation

The redirect-chassis option of logical router ports is now
translated to Gateway_Chassis entries for backwards compatibility.

Gateway_Chassis entries in nbdb are copied over to sbdb and
linked them to the Chassis entry.

Co-authored-by: Anil Venkata <vkommadi@redhat.com>
Signed-off-by: Miguel Angel Ajo <majopela@redhat.com>
Signed-off-by: Anil Venkata <vkommadi@redhat.com>
Signed-off-by: Russell Bryant <russell@ovn.org>

ovn/lib/automake.mk

@@ -5,6 +5,8 @@ ovn_lib_libovn_la_LDFLAGS = \
         $(AM_LDFLAGS)
 ovn_lib_libovn_la_SOURCES = \
 	ovn/lib/actions.c \
+	ovn/lib/chassis-index.c \
+	ovn/lib/chassis-index.h \
 	ovn/lib/expr.c \
 	ovn/lib/lex.c \
 	ovn/lib/ovn-dhcp.h \

ovn/lib/chassis-index.c

@@ -0,0 +1,77 @@
+/* Copyright (c) 2016, 2017 Red Hat, Inc.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include "openvswitch/hmap.h"
+#include "openvswitch/vlog.h"
+#include "ovn/actions.h"
+#include "ovn/lib/chassis-index.h"
+#include "ovn/lib/ovn-sb-idl.h"
+
+VLOG_DEFINE_THIS_MODULE(chassis_index);
+
+struct chassis {
+    struct hmap_node name_node;
+    const struct sbrec_chassis *db;
+};
+
+const struct sbrec_chassis *
+chassis_lookup_by_name(const struct chassis_index *chassis_index,
+                       const char *name)
+{
+    const struct chassis *chassis;
+    HMAP_FOR_EACH_WITH_HASH (chassis, name_node, hash_string(name, 0),
+                             &chassis_index->by_name) {
+        if (!strcmp(chassis->db->name, name)) {
+            return chassis->db;
+        }
+    }
+    return NULL;
+}
+
+void
+chassis_index_init(struct chassis_index *chassis_index,
+                   struct ovsdb_idl *sb_idl)
+{
+    hmap_init(&chassis_index->by_name);
+
+    const struct sbrec_chassis *chassis;
+    SBREC_CHASSIS_FOR_EACH (chassis, sb_idl) {
+        if (!chassis->name) {
+            continue;
+        }
+        struct chassis *c = xmalloc(sizeof *c);
+        hmap_insert(&chassis_index->by_name, &c->name_node,
+                    hash_string(chassis->name, 0));
+        c->db = chassis;
+    }
+}
+
+void
+chassis_index_destroy(struct chassis_index *chassis_index)
+{
+    if (!chassis_index) {
+        return;
+    }
+
+    /* Destroy all of the "struct chassis"s. */
+    struct chassis *chassis, *next;
+    HMAP_FOR_EACH_SAFE (chassis, next, name_node, &chassis_index->by_name) {
+        hmap_remove(&chassis_index->by_name, &chassis->name_node);
+        free(chassis);
+    }
+
+    hmap_destroy(&chassis_index->by_name);
+}

ovn/lib/chassis-index.h

@@ -0,0 +1,40 @@
+/* Copyright (c) 2017, Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef OVN_CHASSIS_INDEX_H
+#define OVN_CHASSIS_INDEX_H 1
+
+#include "openvswitch/hmap.h"
+
+struct chassis_index {
+    struct hmap by_name;
+};
+
+struct ovsdb_idl;
+
+/* Finds and returns the chassis with the given 'name', or NULL if no such
+ * chassis exists. */
+const struct sbrec_chassis *
+chassis_lookup_by_name(const struct chassis_index *chassis_index,
+                       const char *name);
+
+/* Initializes the chassis index out of the ovsdb_idl to SBDB */
+void chassis_index_init(struct chassis_index *chassis_index,
+                        struct ovsdb_idl *sb_idl);
+
+/* Free a chassis index from memory */
+void chassis_index_destroy(struct chassis_index *chassis_index);
+
+#endif /* ovn/lib/chassis-index.h */