config: Enable to configure VRF via config file

This patch enables to configure VRF tables by using config file. This
feature is useful when using VRF-Neighbor feature.

Example of Usage:

```toml
[[vrfs]]
  [vrfs.config]
    name = "vrf1"
    id = 1
    rd = "65000:100"
    both-rt-list = ["65000:100"]
```

Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>

1 files changed, 91 insertions, 2 deletions

diff --git a/tools/pyang_plugins/gobgp.yang b/tools/pyang_plugins/gobgp.yang
index 9022d680..053ef0a0 100644
--- a/tools/pyang_plugins/gobgp.yang
+++ b/tools/pyang_plugins/gobgp.yang
@@ -618,6 +618,90 @@ module gobgp {
       }
     }
   }
+  grouping gobgp-vrf-common {
+    description
+      "Common parameters for VRF configuration and state.";
+
+    leaf name {
+      description
+        "Unique name among all VRF instances.";
+      type string;
+    }
+
+    leaf id {
+      description
+        "Unique identifier among all VRF instances.";
+      type uint32;
+    }
+
+    leaf rd {
+      description
+        "Route Distinguisher for this VRF.";
+      type string;
+    }
+
+    leaf-list import-rt {
+      description
+        "List of import Route Targets for this VRF.";
+      type string;
+    }
+
+    leaf-list export-rt {
+      description
+        "List of export Route Targets for this VRF.";
+      type string;
+    }
+  }
+
+  grouping gobgp-vrf-config {
+    description
+      "Configuration parameters for VRF.";
+
+    leaf-list both-rt {
+      description
+        "List of both import and export Route Targets for this VRF. Each
+        configuration for import and export Route Targets will be preferred.";
+      type string;
+    }
+  }
+
+  grouping gobgp-vrf-set {
+    description "Set of VRF instance configuration and state";
+
+    container config {
+      description
+        "Configuration parameters for VRF.";
+      uses gobgp-vrf-common;
+      uses gobgp-vrf-config;
+    }
+
+    container state {
+      description
+        "Configured states of VRF.";
+      uses gobgp-vrf-common;
+    }
+  }
+
+  grouping gobgp-vrfs {
+    description
+      "Virtual Routing and Forwarding (VRF) instances.";
+
+    container vrfs {
+      list vrf {
+        description
+          "VRF instance configurations on the local system.";
+
+        key "name";
+        leaf name {
+          type leafref {
+            path "../config/name";
+          }
+        }
+
+        uses gobgp-vrf-set;
+      }
+    }
+  }
 
   grouping long-lived-graceful-restart {
       container long-lived-graceful-restart {
@@ -1025,15 +1109,20 @@ module gobgp {
   }
 
   augment "/bgp:bgp" {
-    description "additional rpki configuration and state";
+    description "Additional RPKI configuration and state";
     uses gobgp-rpki-servers;
   }
 
   augment "/bgp:bgp" {
-    description "additional bmp configuration";
+    description "Additional BMP configuration and state";
     uses gobgp-bmp-servers;
   }
 
+  augment "/bgp:bgp" {
+    description "Additional VRF configuration and state";
+    uses gobgp-vrfs;
+  }
+
   typedef mrt-type {
     type enumeration {
       enum UPDATES {