zebra: add source plugin info to dplane context

Some updates may be the result of a plugin's actions - such
as an async notification. Add accessor so that we can
identify that an update was generated by a plugin.

Signed-off-by: Mark Stapp <mjs@voltanet.io>

zebra/zebra_dplane.c

@@ -172,6 +172,11 @@ struct zebra_dplane_ctx {
 	uint32_t zd_seq;
 	uint32_t zd_old_seq;
 
+	/* Some updates may be generated by notifications: allow the
+	 * plugin to notice and ignore results from its own notifications.
+	 */
+	uint32_t zd_notif_provider;
+
 	/* TODO -- internal/sub-operation status? */
 	enum zebra_dplane_result zd_remote_status;
 	enum zebra_dplane_result zd_kernel_status;
@@ -710,6 +715,20 @@ vrf_id_t dplane_ctx_get_vrf(const struct zebra_dplane_ctx *ctx)
 	return ctx->zd_vrf_id;
 }
 
+bool dplane_ctx_is_from_notif(const struct zebra_dplane_ctx *ctx)
+{
+	DPLANE_CTX_VALID(ctx);
+
+	return (ctx->zd_notif_provider != 0);
+}
+
+uint32_t dplane_ctx_get_notif_provider(const struct zebra_dplane_ctx *ctx)
+{
+	DPLANE_CTX_VALID(ctx);
+
+	return ctx->zd_notif_provider;
+}
+
 void dplane_ctx_set_type(struct zebra_dplane_ctx *ctx, int type)
 {
 	DPLANE_CTX_VALID(ctx);

zebra/zebra_dplane.h

@@ -201,6 +201,9 @@ uint32_t dplane_ctx_get_old_seq(const struct zebra_dplane_ctx *ctx);
 void dplane_ctx_set_vrf(struct zebra_dplane_ctx *ctx, vrf_id_t vrf);
 vrf_id_t dplane_ctx_get_vrf(const struct zebra_dplane_ctx *ctx);
 
+bool dplane_ctx_is_from_notif(const struct zebra_dplane_ctx *ctx);
+uint32_t dplane_ctx_get_notif_provider(const struct zebra_dplane_ctx *ctx);
+
 /* Accessors for route update information */
 void dplane_ctx_set_type(struct zebra_dplane_ctx *ctx, int type);
 int dplane_ctx_get_type(const struct zebra_dplane_ctx *ctx);