[PATCH] x86: error_code is not safe for kprobes
[linux-2.6] / include / net / inetpeer.h
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 */
28         atomic_t                rid;            /* Frag reception counter */
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 */