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Commit ebee3cad authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
Browse files

ipv6: Add IPv6 multipath notifications for add / replace 



Emit a notification when a multipath routes is added or replace.

Note that unlike the replace notifications sent from fib6_add_rt2node(),
it is possible we are sending a 'FIB_EVENT_ENTRY_REPLACE' when a route
was merely added and not replaced.

Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Reviewed-by: default avatarDavid Ahern <dsahern@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d133e4f1

net/ipv6/route.c

+15 −0
Original line number Diff line number Diff line
@@ -4965,6 +4965,7 @@ static int ip6_route_multipath_add(struct fib6_config *cfg, 
{

	struct fib6_info *rt_notif = NULL, *rt_last = NULL;

	struct nl_info *info = &cfg->fc_nlinfo;

	enum fib_event_type event_type;

	struct fib6_config r_cfg;

	struct rtnexthop *rtnh;

	struct fib6_info *rt;
@@ -5042,6 +5043,11 @@ static int ip6_route_multipath_add(struct fib6_config *cfg, 
	 */

	info->skip_notify = 1;



	/* For add and replace, send one notification with all nexthops. For

	 * append, send one notification with all appended nexthops.

	 */

	info->skip_notify_kernel = 1;



	err_nh = NULL;

	list_for_each_entry(nh, &rt6_nh_list, next) {

		err = __ip6_ins_rt(nh->fib6_info, info, extack);
@@ -5078,6 +5084,15 @@ static int ip6_route_multipath_add(struct fib6_config *cfg, 
		nhn++;

	}



	event_type = replace ? FIB_EVENT_ENTRY_REPLACE : FIB_EVENT_ENTRY_ADD;

	err = call_fib6_multipath_entry_notifiers(info->nl_net, event_type,

						  rt_notif, nhn - 1, extack);

	if (err) {

		/* Delete all the siblings that were just added */

		err_nh = NULL;

		goto add_errout;

	}



	/* success ... tell user about new route */

	ip6_route_mpath_notify(rt_notif, rt_last, info, nlflags);

	goto cleanup;