Commit 5249dec7 authored Sep 25, 2013 by Veaceslav Falico Committed by David S. Miller Sep 26, 2013

net: add RCU variant to search for netdev_adjacent link



Currently we have only the RTNL flavour, however we can traverse it while
holding only RCU, so add the RCU search. Add an RCU variant that uses
list_head * as an argument, so that it can be universally used afterwards.

CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Cong Wang <amwang@redhat.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 2f268f12

net/core/dev.c

+13 −0

Original line number	Diff line number	Diff line
		@@ -4380,6 +4380,19 @@ struct netdev_adjacent {
		struct rcu_head rcu;
		};

		static struct netdev_adjacent __netdev_find_adj_rcu(struct net_device dev,
		struct net_device *adj_dev,
		struct list_head *adj_list)
		{
		struct netdev_adjacent *adj;

		list_for_each_entry_rcu(adj, adj_list, list) {
		if (adj->dev == adj_dev)
		return adj;
		}
		return NULL;
		}

		static struct netdev_adjacent __netdev_find_adj(struct net_device dev,
		struct net_device *adj_dev,
		struct list_head *adj_list)