From: Ido Schimmel <ido...@nvidia.com> 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. Signed-off-by: Ido Schimmel <ido...@nvidia.com> --- include/net/nexthop.h | 3 ++- net/ipv4/nexthop.c | 6 +++++- 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/net/nexthop.h b/include/net/nexthop.h index 4147681e86d2..6431ff8cdb89 100644 --- a/include/net/nexthop.h +++ b/include/net/nexthop.h @@ -106,7 +106,8 @@ struct nexthop { enum nexthop_event_type { NEXTHOP_EVENT_ADD, - NEXTHOP_EVENT_DEL + NEXTHOP_EVENT_DEL, + NEXTHOP_EVENT_REPLACE, }; struct nh_notifier_single_info { diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c index 71605c612458..1fa249facd46 100644 --- a/net/ipv4/nexthop.c +++ b/net/ipv4/nexthop.c @@ -1277,7 +1277,11 @@ static int insert_nexthop(struct net *net, struct nexthop *new_nh, rb_link_node_rcu(&new_nh->rb_node, parent, pp); rb_insert_color(&new_nh->rb_node, root); - rc = 0; + + rc = call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, new_nh, extack); + if (rc) + rb_erase(&new_nh->rb_node, &net->nexthop.rb_root); + out: if (!rc) { nh_base_seq_inc(net); -- 2.26.2