Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit dcdca2c4 authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

bridge: multicast router list manipulation 



I prefer that the hlist be only accessed through the hlist macro
objects. Explicit twiddling of links (especially with RCU) exposes
the code to future bugs.

Compile tested only.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 7180f775

net/bridge/br_multicast.c

+15 −15
Original line number Diff line number Diff line
@@ -1042,21 +1042,21 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br, 
static void br_multicast_add_router(struct net_bridge *br,

				    struct net_bridge_port *port)

{

	struct hlist_node *p;

	struct hlist_node **h;



	for (h = &br->router_list.first;

	     (p = *h) &&

	     (unsigned long)container_of(p, struct net_bridge_port, rlist) >

	     (unsigned long)port;

	     h = &p->next)

		;



	port->rlist.pprev = h;

	port->rlist.next = p;

	rcu_assign_pointer(*h, &port->rlist);

	if (p)

		p->pprev = &port->rlist.next;

	struct net_bridge_port *p;

	struct hlist_node *n, *last = NULL;



	hlist_for_each_entry(p, n, &br->router_list, rlist) {

		if ((unsigned long) port >= (unsigned long) p) {

			hlist_add_before_rcu(n, &port->rlist);

			return;

		}

		last = n;

	}



	if (last)

		hlist_add_after_rcu(last, &port->rlist);

	else

		hlist_add_head_rcu(&port->rlist, &br->router_list);

}



static void br_multicast_mark_router(struct net_bridge *br,