nexthop: Emit a notification when a nexthop is added
Emit a notification in the nexthop notification chain when a new nexthop
is added (not replaced). The nexthop can either be a new group or a
single nexthop.
The notification is sent after the nexthop is inserted into the
red-black tree, as listeners might need to callback into the nexthop
code with the nexthop ID in order to mark the nexthop as offloaded.
A 'REPLACE' notification is emitted instead of 'ADD' as the distinction
between the two is not important for in-kernel listeners. In case the
listener is not familiar with the encoded nexthop ID, it can simply
treat it as a new one. This is also consistent with the route offload
API.
Changes since RFC:
* Reword commit message
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
diff --git a/include/net/nexthop.h b/include/net/nexthop.h
index aa7ac12..9c85199 100644
--- a/include/net/nexthop.h
+++ b/include/net/nexthop.h
@@ -105,7 +105,8 @@ struct nexthop {
};
enum nexthop_event_type {
- NEXTHOP_EVENT_DEL
+ NEXTHOP_EVENT_DEL,
+ NEXTHOP_EVENT_REPLACE,
};
struct nh_notifier_single_info {