zebra: start dataplane layer work

Reduce or eliminate use of global zebra_ns structs in
a couple of netlink/kernel code paths, so that those paths
can potentially be made asynch eventually.

Slide netlink_talk_info into place to remove dependency on core
zebra structs; add accessors for dplane context block

Start init of route context from zebra core re and rn structs;
start queueing and event handling for incoming route updates.

Expose netlink apis that don't rely on zebra core structs;
add parallel route-update code path using the dplane ctx;
simplest possible event loop to process queued route'
updates.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/zebra/rt.h b/zebra/rt.h
index dbea298584..a4db8968a5 100644
--- a/zebra/rt.h
+++ b/zebra/rt.h
@@ -58,6 +58,12 @@ extern void kernel_route_rib_pass_fail(struct route_node *rn,
 				       struct route_entry *re,
 				       enum zebra_dplane_status res);
 
+/*
+ * Update or delete a prefix from the kernel,
+ * using info from a dataplane context.
+ */
+extern enum zebra_dplane_result kernel_route_update(dplane_ctx_h ctx);
+
 extern int kernel_address_add_ipv4(struct interface *, struct connected *);
 extern int kernel_address_delete_ipv4(struct interface *, struct connected *);
 extern int kernel_address_add_ipv6(struct interface *, struct connected *);