net/ipv4/nexthop.c

1559 static int fib6_check_nh_list(struct nexthop *old, struct nexthop *new,
1564 	if (list_empty(&old->f6i_list))
1567 	list_for_each_entry(f6i, &old->f6i_list, nh_list) {
1635 static int fib_check_nh_list(struct nexthop *old, struct nexthop *new,
1640 	list_for_each_entry(fi, &old->fi_list, nh_list) {
2009 	/* copy old entries to new except the one getting removed */
2166 	/* if an IPv6 group was replaced, we have to release all old
2182 static int replace_nexthop_grp(struct net *net, struct nexthop *old,
2197 	oldg = rtnl_dereference(old->nh_grp);
2249 		newg->nh_entries[i].nh_parent = old;
2251 	rcu_assign_pointer(old->nh_grp, newg);
2288 					     struct nexthop *old,
2302 		if (nhge->nh == old) {
2320 		if (nhge->nh == old)
2330 					 struct nexthop *old,
2344 							 old, oldi, newi,
2351 static int replace_nexthop_single(struct net *net, struct nexthop *old,
2369 	/* Hardware flags were set on 'old' as 'new' is not in the red-black
2370 	 * tree. Therefore, inherit the flags from 'old' to 'new'.
2372 	new->nh_flags |= old->nh_flags & (RTNH_F_OFFLOAD | RTNH_F_TRAP);
2374 	oldi = rtnl_dereference(old->nh_info);
2377 	newi->nh_parent = old;
2380 	old_protocol = old->protocol;
2381 	old_nh_flags = old->nh_flags;
2383 	old->protocol = new->protocol;
2384 	old->nh_flags = new->nh_flags;
2386 	rcu_assign_pointer(old->nh_info, newi);
2390 	list_for_each_entry(nhge, &old->grp_list, nh_list) {
2393 		err = replace_nexthop_single_notify(net, nhp, old, oldi, newi,
2403 		list_for_each_entry(nhge, &old->grp_list, nh_list) {
2416 	rcu_assign_pointer(old->nh_info, oldi);
2417 	old->nh_flags = old_nh_flags;
2418 	old->protocol = old_protocol;
2419 	oldi->nh_parent = old;
2421 	list_for_each_entry_continue_reverse(nhge, &old->grp_list, nh_list) {
2424 		replace_nexthop_single_notify(net, nhp, old, newi, oldi, NULL);
2426 	call_nexthop_notifiers(net, NEXTHOP_EVENT_REPLACE, old, extack);
2470 static int replace_nexthop(struct net *net, struct nexthop *old,
2481 	err = fib_check_nh_list(old, new, extack);
2485 	err = fib6_check_nh_list(old, new, extack);
2495 	list_for_each_entry(nhge, &old->grp_list, nh_list) {
2514 	if (old->is_group)
2515 		err = replace_nexthop_grp(net, old, new, cfg, extack);
2517 		err = replace_nexthop_single(net, old, new, extack);
2520 		nh_rt_cache_flush(net, old, new);
2559 				new_nh = nh; /* send notification with old nh */