nexthop: Only emit a notification when nexthop is actually deleted
Currently, the in-kernel delete notification is emitted from the error path of nexthop_add() and replace_nexthop(), which can be confusing to in-kernel listeners as they are not familiar with the nexthop. Instead, only emit the notification when the nexthop is actually deleted. The following sub-cases are covered: 1. User space deletes the nexthop 2. The nexthop is deleted by the kernel due to a netdev event (e.g., nexthop device going down) 3. A group is deleted because its last nexthop is being deleted 4. The network namespace of the nexthop device is deleted Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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