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 keylen); 19 void nf_conncount_destroy(struct net *net, struct nf_conncount_data *data); 20 21 unsigned int nf_conncount_count(struct net *net, 22 struct nf_conncount_data *data, 23 const u32 *key, 24 const struct nf_conntrack_tuple *tuple, 25 const struct nf_conntrack_zone *zone); 26 27 int nf_conncount_add(struct net *net, struct nf_conncount_list *list, 28 const struct nf_conntrack_tuple *tuple, 29 const struct nf_conntrack_zone *zone); 30 31 void nf_conncount_list_init(struct nf_conncount_list *list); 32 33 bool nf_conncount_gc_list(struct net *net, 34 struct nf_conncount_list *list); 35 36 void nf_conncount_cache_free(struct nf_conncount_list *list); 37 38 #endif 39