From 67a8fc27cca06e185c1ab39baaccd2103f6f9f51 Mon Sep 17 00:00:00 2001 From: Patrick McHardy Date: Tue, 18 Feb 2014 18:06:49 +0000 Subject: [PATCH] netfilter: nf_tables: add nft_dereference() macro Signed-off-by: Patrick McHardy Signed-off-by: Pablo Neira Ayuso --- include/net/netfilter/nf_tables.h | 4 ++++ net/netfilter/nf_tables_api.c | 3 +-- 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h index e7e14ff..81abd61 100644 --- a/include/net/netfilter/nf_tables.h +++ b/include/net/netfilter/nf_tables.h @@ -3,6 +3,7 @@ #include #include +#include #include #include #include @@ -521,6 +522,9 @@ void nft_unregister_chain_type(const struct nf_chain_type *); int nft_register_expr(struct nft_expr_type *); void nft_unregister_expr(struct nft_expr_type *); +#define nft_dereference(p) \ + nfnl_dereference(p, NFNL_SUBSYS_NFTABLES) + #define MODULE_ALIAS_NFT_FAMILY(family) \ MODULE_ALIAS("nft-afinfo-" __stringify(family)) diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index adce01e..4b7e14d 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -794,9 +794,8 @@ nf_tables_counters(struct nft_base_chain *chain, const struct nlattr *attr) stats->pkts = be64_to_cpu(nla_get_be64(tb[NFTA_COUNTER_PACKETS])); if (chain->stats) { - /* nfnl_lock is held, add some nfnl function for this, later */ struct nft_stats __percpu *oldstats = - rcu_dereference_protected(chain->stats, 1); + nft_dereference(chain->stats); rcu_assign_pointer(chain->stats, newstats); synchronize_rcu(); -- 2.7.4