From fe2923afc12490e92237d23fc0b29f31da72a4f9 Mon Sep 17 00:00:00 2001 From: Vlad Buslov Date: Mon, 11 Feb 2019 10:55:40 +0200 Subject: net: sched: traverse classifiers in chain with tcf_get_next_proto() All users of chain->filters_chain rely on rtnl lock and assume that no new classifier instances are added when traversing the list. Use tcf_get_next_proto() to traverse filters list without relying on rtnl mutex. This function iterates over classifiers by taking reference to current iterator classifier only and doesn't assume external synchronization of filters list. Signed-off-by: Vlad Buslov Acked-by: Jiri Pirko Signed-off-by: David S. Miller --- include/net/pkt_cls.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h index 38bee7dd21d1..e5dafa5ee1b2 100644 --- a/include/net/pkt_cls.h +++ b/include/net/pkt_cls.h @@ -46,6 +46,8 @@ struct tcf_chain *tcf_chain_get_by_act(struct tcf_block *block, void tcf_chain_put_by_act(struct tcf_chain *chain); struct tcf_chain *tcf_get_next_chain(struct tcf_block *block, struct tcf_chain *chain); +struct tcf_proto *tcf_get_next_proto(struct tcf_chain *chain, + struct tcf_proto *tp); void tcf_block_netif_keep_dst(struct tcf_block *block); int tcf_block_get(struct tcf_block **p_block, struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q, -- cgit v1.2.3