1 #ifndef _NF_CONNTRACK_COUNT_H
2 #define _NF_CONNTRACK_COUNT_H
3 
4 #include <linux/list.h>
5 #include <linux/spinlock.h>
6 #include <net/netfilter/nf_conntrack_tuple.h>
7 #include <net/netfilter/nf_conntrack_zones.h>
8 
9 struct nf_conncount_data;
10 
11 struct nf_conncount_list {
12 	spinlock_t list_lock;
13 	u32 last_gc;		/* jiffies at most recent gc */
14 	struct list_head head;	/* connections with the same filtering key */
15 	unsigned int count;	/* length of list */
16 };
17 
18 struct nf_conncount_data *nf_conncount_init(struct net *net, unsigned int family,
19 					    unsigned int keylen);
20 void nf_conncount_destroy(struct net *net, unsigned int family,
21 			  struct nf_conncount_data *data);
22 
23 unsigned int nf_conncount_count(struct net *net,
24 				struct nf_conncount_data *data,
25 				const u32 *key,
26 				const struct nf_conntrack_tuple *tuple,
27 				const struct nf_conntrack_zone *zone);
28 
29 int nf_conncount_add(struct net *net, struct nf_conncount_list *list,
30 		     const struct nf_conntrack_tuple *tuple,
31 		     const struct nf_conntrack_zone *zone);
32 
33 void nf_conncount_list_init(struct nf_conncount_list *list);
34 
35 bool nf_conncount_gc_list(struct net *net,
36 			  struct nf_conncount_list *list);
37 
38 void nf_conncount_cache_free(struct nf_conncount_list *list);
39 
40 #endif
41