return vrf;
}
+/* Update a VRF. If not found, create one.
+ * Arg:
+ * name - The name of the vrf.
+ * vrf_id - The vrf_id of the vrf.
+ * Description: This function first finds the vrf using its name. If the vrf is
+ * found and the vrf-id of the existing vrf does not match the new vrf id, it
+ * will disable the existing vrf and update it with new vrf-id. If the vrf is
+ * not found, it will create the vrf with given name and the new vrf id.
+ */
+struct vrf *vrf_update(vrf_id_t new_vrf_id, const char *name)
+{
+ struct vrf *vrf = NULL;
+
+ /*Treat VRF add for existing vrf as update
+ * Update VRF ID and also update in VRF ID table
+ */
+ if (name)
+ vrf = vrf_lookup_by_name(name);
+ if (vrf && new_vrf_id != VRF_UNKNOWN && vrf->vrf_id != VRF_UNKNOWN
+ && vrf->vrf_id != new_vrf_id) {
+ if (debug_vrf) {
+ zlog_debug(
+ "Vrf Update event: %s old id: %u, new id: %u",
+ name, vrf->vrf_id, new_vrf_id);
+ }
+
+ /*Disable the vrf to simulate implicit delete
+ * so that all stale routes are deleted
+ * This vrf will be enabled down the line
+ */
+ vrf_disable(vrf);
+
+
+ RB_REMOVE(vrf_id_head, &vrfs_by_id, vrf);
+ vrf->vrf_id = new_vrf_id;
+ RB_INSERT(vrf_id_head, &vrfs_by_id, vrf);
+
+ } else {
+
+ /*
+ * vrf_get is implied creation if it does not exist
+ */
+ vrf = vrf_get(new_vrf_id, name);
+ }
+ return vrf;
+}
+
/* Delete a VRF. This is called when the underlying VRF goes away, a
* pre-configured VRF is deleted or when shutting down (vrf_terminate()).
*/
extern struct vrf *vrf_lookup_by_id(vrf_id_t);
extern struct vrf *vrf_lookup_by_name(const char *);
extern struct vrf *vrf_get(vrf_id_t, const char *);
+extern struct vrf *vrf_update(vrf_id_t new_vrf_id, const char *name);
extern const char *vrf_id_to_name(vrf_id_t vrf_id);
extern vrf_id_t vrf_name_to_id(const char *);
struct ifinfomsg *ifi;
struct rtattr *linkinfo[IFLA_INFO_MAX + 1];
struct rtattr *attr[IFLA_VRF_MAX + 1];
- struct vrf *vrf;
+ struct vrf *vrf = NULL;
struct zebra_vrf *zvrf;
uint32_t nl_table_id;
}
}
- /*
- * vrf_get is implied creation if it does not exist
- */
- vrf = vrf_get((vrf_id_t)ifi->ifi_index,
- name); // It would create vrf
+ vrf = vrf_update((vrf_id_t)ifi->ifi_index, name);
if (!vrf) {
flog_err(EC_LIB_INTERFACE, "VRF %s id %u not created",
name, ifi->ifi_index);