/* * INETPEER - A storage for permanent information about peers * * Version: $Id: inetpeer.h,v 1.2 2002/01/12 07:54:56 davem Exp $ * * Authors: Andrey V. Savochkin <saw@msu.ru> */ #ifndef _NET_INETPEER_H #define _NET_INETPEER_H #include <linux/types.h> #include <linux/init.h> #include <linux/jiffies.h> #include <linux/spinlock.h> #include <asm/atomic.h> struct inet_peer { struct inet_peer *avl_left, *avl_right; struct inet_peer *unused_next, **unused_prevp; unsigned long dtime; /* the time of last use of not * referenced entries */ atomic_t refcnt; __u32 v4daddr; /* peer's address */ __u16 avl_height; __u16 ip_id_count; /* IP ID for the next packet */ atomic_t rid; /* Frag reception counter */ __u32 tcp_ts; unsigned long tcp_ts_stamp; }; void inet_initpeers(void) __init; /* can be called with or without local BH being disabled */ struct inet_peer *inet_getpeer(__u32 daddr, int create); extern spinlock_t inet_peer_unused_lock; extern struct inet_peer **inet_peer_unused_tailp; /* can be called from BH context or outside */ static inline void inet_putpeer(struct inet_peer *p) { spin_lock_bh(&inet_peer_unused_lock); if (atomic_dec_and_test(&p->refcnt)) { p->unused_prevp = inet_peer_unused_tailp; p->unused_next = NULL; *inet_peer_unused_tailp = p; inet_peer_unused_tailp = &p->unused_next; p->dtime = jiffies; } spin_unlock_bh(&inet_peer_unused_lock); } extern spinlock_t inet_peer_idlock; /* can be called with or without local BH being disabled */ static inline __u16 inet_getid(struct inet_peer *p, int more) { __u16 id; spin_lock_bh(&inet_peer_idlock); id = p->ip_id_count; p->ip_id_count += 1 + more; spin_unlock_bh(&inet_peer_idlock); return id; } #endif /* _NET_INETPEER_H */