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 { 18 /* group together avl_left,avl_right,v4daddr to speedup lookups */ 19 struct inet_peer *avl_left, *avl_right; 20 __be32 v4daddr; /* peer's address */ 21 __u16 avl_height; 22 __u16 ip_id_count; /* IP ID for the next packet */ 23 struct list_head unused; 24 __u32 dtime; /* the time of last use of not 25 * referenced entries */ 26 atomic_t refcnt; 27 atomic_t rid; /* Frag reception counter */ 28 __u32 tcp_ts; 29 unsigned long tcp_ts_stamp; 30 }; 31 32 void inet_initpeers(void) __init; 33 34 /* can be called with or without local BH being disabled */ 35 struct inet_peer *inet_getpeer(__be32 daddr, int create); 36 37 /* can be called from BH context or outside */ 38 extern void inet_putpeer(struct inet_peer *p); 39 40 extern spinlock_t inet_peer_idlock; 41 /* can be called with or without local BH being disabled */ 42 static inline __u16 inet_getid(struct inet_peer *p, int more) 43 { 44 __u16 id; 45 46 spin_lock_bh(&inet_peer_idlock); 47 id = p->ip_id_count; 48 p->ip_id_count += 1 + more; 49 spin_unlock_bh(&inet_peer_idlock); 50 return id; 51 } 52 53 #endif /* _NET_INETPEER_H */ 54