projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * INETPEER - A storage for permanent information about peers | |
| 3 | * | |
| 4 | * Version: $Id: inetpeer.h,v 1.2 2002/01/12 07:54:56 davem Exp $ | |
| 5 | * | |
| 6 | * Authors: Andrey V. Savochkin <saw@msu.ru> | |
| 7 | */ | |
| 8 | ||
| 9 | #ifndef _NET_INETPEER_H | |
| 10 | #define _NET_INETPEER_H | |
| 11 | ||
| 12 | #include <linux/types.h> | |
| 13 | #include <linux/init.h> | |
| 14 | #include <linux/jiffies.h> | |
| 15 | #include <linux/spinlock.h> | |
| 16 | #include <asm/atomic.h> | |
| 17 | ||
| 18 | struct inet_peer | |
| 19 | { | |
| 20 | struct inet_peer *avl_left, *avl_right; | |
| 21 | struct inet_peer *unused_next, **unused_prevp; | |
| 22 | unsigned long dtime; /* the time of last use of not | |
| 23 | * referenced entries */ | |
| 24 | atomic_t refcnt; | |
| 25 | __u32 v4daddr; /* peer's address */ | |
| 26 | __u16 avl_height; | |
| 27 | __u16 ip_id_count; /* IP ID for the next packet */ | |
| 89cee8b1 | 28 | atomic_t rid; /* Frag reception counter */ |
| 1da177e4 LT |
29 | __u32 tcp_ts; |
| 30 | unsigned long tcp_ts_stamp; | |
| 31 | }; | |
| 32 | ||
| 33 | void inet_initpeers(void) __init; | |
| 34 | ||
| 35 | /* can be called with or without local BH being disabled */ | |
| 36 | struct inet_peer *inet_getpeer(__u32 daddr, int create); | |
| 37 | ||
| 38 | extern spinlock_t inet_peer_unused_lock; | |
| 39 | extern struct inet_peer **inet_peer_unused_tailp; | |
| 40 | /* can be called from BH context or outside */ | |
| 41 | static inline void inet_putpeer(struct inet_peer *p) | |
| 42 | { | |
| 43 | spin_lock_bh(&inet_peer_unused_lock); | |
| 44 | if (atomic_dec_and_test(&p->refcnt)) { | |
| 45 | p->unused_prevp = inet_peer_unused_tailp; | |
| 46 | p->unused_next = NULL; | |
| 47 | *inet_peer_unused_tailp = p; | |
| 48 | inet_peer_unused_tailp = &p->unused_next; | |
| 49 | p->dtime = jiffies; | |
| 50 | } | |
| 51 | spin_unlock_bh(&inet_peer_unused_lock); | |
| 52 | } | |
| 53 | ||
| 54 | extern spinlock_t inet_peer_idlock; | |
| 55 | /* can be called with or without local BH being disabled */ | |
| 56 | static inline __u16 inet_getid(struct inet_peer *p, int more) | |
| 57 | { | |
| 58 | __u16 id; | |
| 59 | ||
| 60 | spin_lock_bh(&inet_peer_idlock); | |
| 61 | id = p->ip_id_count; | |
| 62 | p->ip_id_count += 1 + more; | |
| 63 | spin_unlock_bh(&inet_peer_idlock); | |
| 64 | return id; | |
| 65 | } | |
| 66 | ||
| 67 | #endif /* _NET_INETPEER_H */ |