1 /* 2 * INETPEER - A storage for permanent information about peers 3 * 4 * Authors: Andrey V. Savochkin <saw@msu.ru> 5 */ 6 7 #ifndef _NET_INETPEER_H 8 #define _NET_INETPEER_H 9 10 #include <linux/types.h> 11 #include <linux/init.h> 12 #include <linux/jiffies.h> 13 #include <linux/spinlock.h> 14 #include <asm/atomic.h> 15 16 struct inet_peer { 17 /* group together avl_left,avl_right,v4daddr to speedup lookups */ 18 struct inet_peer *avl_left, *avl_right; 19 __be32 v4daddr; /* peer's address */ 20 __u32 avl_height; 21 struct list_head unused; 22 __u32 dtime; /* the time of last use of not 23 * referenced entries */ 24 atomic_t refcnt; 25 atomic_t rid; /* Frag reception counter */ 26 atomic_t ip_id_count; /* IP ID for the next packet */ 27 __u32 tcp_ts; 28 __u32 tcp_ts_stamp; 29 }; 30 31 void inet_initpeers(void) __init; 32 33 /* can be called with or without local BH being disabled */ 34 struct inet_peer *inet_getpeer(__be32 daddr, int create); 35 36 /* can be called from BH context or outside */ 37 extern void inet_putpeer(struct inet_peer *p); 38 39 /* can be called with or without local BH being disabled */ 40 static inline __u16 inet_getid(struct inet_peer *p, int more) 41 { 42 more++; 43 return atomic_add_return(more, &p->ip_id_count) - more; 44 } 45 46 #endif /* _NET_INETPEER_H */ 47