2 * INETPEER - A storage for permanent information about peers
4 * Authors: Andrey V. Savochkin <saw@msu.ru>
7 #ifndef _NET_INETPEER_H
8 #define _NET_INETPEER_H
10 #include <linux/types.h>
11 #include <linux/init.h>
12 #include <linux/jiffies.h>
13 #include <linux/spinlock.h>
14 #include <linux/rtnetlink.h>
16 #include <linux/atomic.h>
18 struct inetpeer_addr_base {
26 struct inetpeer_addr {
27 struct inetpeer_addr_base addr;
32 /* group together avl_left,avl_right,v4daddr to speedup lookups */
33 struct inet_peer __rcu *avl_left, *avl_right;
34 struct inetpeer_addr daddr;
37 u32 metrics[RTAX_MAX];
38 u32 rate_tokens; /* rate limiting for ICMP */
39 unsigned long rate_last;
41 struct list_head gc_list;
42 struct rcu_head gc_rcu;
45 * Once inet_peer is queued for deletion (refcnt == -1), following field
46 * is not available: rid
47 * We can share memory with rcu_head to help keep inet_peer small.
51 atomic_t rid; /* Frag reception counter */
54 struct inet_peer *gc_next;
57 /* following fields might be frequently dirtied */
58 __u32 dtime; /* the time of last use of not referenced entries */
62 struct inet_peer_base {
63 struct inet_peer __rcu *root;
68 void inet_peer_base_init(struct inet_peer_base *);
70 void inet_initpeers(void) __init;
72 #define INETPEER_METRICS_NEW (~(u32) 0)
74 static inline void inetpeer_set_addr_v4(struct inetpeer_addr *iaddr, __be32 ip)
77 iaddr->family = AF_INET;
80 static inline __be32 inetpeer_get_addr_v4(struct inetpeer_addr *iaddr)
82 return iaddr->addr.a4;
85 static inline void inetpeer_set_addr_v6(struct inetpeer_addr *iaddr,
88 iaddr->addr.in6 = *in6;
89 iaddr->family = AF_INET6;
92 static inline struct in6_addr *inetpeer_get_addr_v6(struct inetpeer_addr *iaddr)
94 return &iaddr->addr.in6;
97 /* can be called with or without local BH being disabled */
98 struct inet_peer *inet_getpeer(struct inet_peer_base *base,
99 const struct inetpeer_addr *daddr,
102 static inline struct inet_peer *inet_getpeer_v4(struct inet_peer_base *base,
106 struct inetpeer_addr daddr;
108 daddr.addr.a4 = v4daddr;
109 daddr.family = AF_INET;
110 return inet_getpeer(base, &daddr, create);
113 static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base,
114 const struct in6_addr *v6daddr,
117 struct inetpeer_addr daddr;
119 daddr.addr.in6 = *v6daddr;
120 daddr.family = AF_INET6;
121 return inet_getpeer(base, &daddr, create);
124 static inline int inetpeer_addr_cmp(const struct inetpeer_addr *a,
125 const struct inetpeer_addr *b)
127 int i, n = (a->family == AF_INET ? 1 : 4);
129 for (i = 0; i < n; i++) {
130 if (a->addr.a6[i] == b->addr.a6[i])
132 if ((__force u32)a->addr.a6[i] < (__force u32)b->addr.a6[i])
140 /* can be called from BH context or outside */
141 void inet_putpeer(struct inet_peer *p);
142 bool inet_peer_xrlim_allow(struct inet_peer *peer, int timeout);
144 void inetpeer_invalidate_tree(struct inet_peer_base *);
146 #endif /* _NET_INETPEER_H */