lib, zebra: move ns context intialization to zebra

vrf->ns_ctxt is only ever used in zebra, so move its initialization to
zebra's callback. Ideally this pointer shouldn't even be a part of
library's vrf struct, and moved to zebra-specific struct, but this is
the first step.

Signed-off-by: Igor Ryzhov <idryzhov@gmail.com>

lib/vrf.c

@@ -539,15 +539,6 @@ void vrf_init(int (*create)(struct vrf *), int (*enable)(struct vrf *),
 			 "vrf_init: failed to create the default VRF!");
 		exit(1);
 	}
-	if (vrf_is_backend_netns()) {
-		struct ns *ns;
-
-		strlcpy(default_vrf->data.l.netns_name,
-			VRF_DEFAULT_NAME, NS_NAMSIZ);
-		ns = ns_lookup(NS_DEFAULT);
-		ns->vrf_ctxt = default_vrf;
-		default_vrf->ns_ctxt = ns;
-	}
 
 	/* Enable the default VRF. */
 	if (!vrf_enable(default_vrf)) {

zebra/zebra_vrf.c

@@ -98,6 +98,15 @@ static int zebra_vrf_new(struct vrf *vrf)
 	zvrf = zebra_vrf_alloc(vrf);
 	if (!vrf_is_backend_netns())
 		zvrf->zns = zebra_ns_lookup(NS_DEFAULT);
+	else if (vrf->vrf_id == VRF_DEFAULT) {
+		struct ns *ns;
+
+		strlcpy(vrf->data.l.netns_name,
+			VRF_DEFAULT_NAME, NS_NAMSIZ);
+		ns = ns_lookup(NS_DEFAULT);
+		ns->vrf_ctxt = vrf;
+		vrf->ns_ctxt = ns;
+	}
 
 	otable_init(&zvrf->other_tables);