Commit 67a8fc27 authored by Patrick McHardy's avatar Patrick McHardy Committed by Pablo Neira Ayuso
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netfilter: nf_tables: add nft_dereference() macro 



Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
parent 0eb5db7a

include/net/netfilter/nf_tables.h

+4 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 


#include <linux/list.h>

#include <linux/netfilter.h>

#include <linux/netfilter/nfnetlink.h>

#include <linux/netfilter/x_tables.h>

#include <linux/netfilter/nf_tables.h>

#include <net/netlink.h>
@@ -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))

net/netfilter/nf_tables_api.c

+1 −2
Original line number Diff line number Diff line
@@ -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();

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