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 #define INETPEER_MAXKEYSZ (sizeof(struct in6_addr) / sizeof(u32))
20 struct inetpeer_addr {
24 u32 key[INETPEER_MAXKEYSZ];
30 /* group together avl_left,avl_right,v4daddr to speedup lookups */
31 struct inet_peer __rcu *avl_left, *avl_right;
32 struct inetpeer_addr daddr;
35 u32 metrics[RTAX_MAX];
36 u32 rate_tokens; /* rate limiting for ICMP */
37 unsigned long rate_last;
39 struct list_head gc_list;
40 struct rcu_head gc_rcu;
43 * Once inet_peer is queued for deletion (refcnt == -1), following field
44 * is not available: rid
45 * We can share memory with rcu_head to help keep inet_peer small.
49 atomic_t rid; /* Frag reception counter */
52 struct inet_peer *gc_next;
55 /* following fields might be frequently dirtied */
56 __u32 dtime; /* the time of last use of not referenced entries */
60 struct inet_peer_base {
61 struct inet_peer __rcu *root;
66 void inet_peer_base_init(struct inet_peer_base *);
68 void inet_initpeers(void) __init;
70 #define INETPEER_METRICS_NEW (~(u32) 0)
72 static inline void inetpeer_set_addr_v4(struct inetpeer_addr *iaddr, __be32 ip)
75 iaddr->family = AF_INET;
78 static inline __be32 inetpeer_get_addr_v4(struct inetpeer_addr *iaddr)
83 static inline void inetpeer_set_addr_v6(struct inetpeer_addr *iaddr,
87 iaddr->family = AF_INET6;
90 static inline struct in6_addr *inetpeer_get_addr_v6(struct inetpeer_addr *iaddr)
95 /* can be called with or without local BH being disabled */
96 struct inet_peer *inet_getpeer(struct inet_peer_base *base,
97 const struct inetpeer_addr *daddr,
100 static inline struct inet_peer *inet_getpeer_v4(struct inet_peer_base *base,
104 struct inetpeer_addr daddr;
107 daddr.family = AF_INET;
108 return inet_getpeer(base, &daddr, create);
111 static inline struct inet_peer *inet_getpeer_v6(struct inet_peer_base *base,
112 const struct in6_addr *v6daddr,
115 struct inetpeer_addr daddr;
118 daddr.family = AF_INET6;
119 return inet_getpeer(base, &daddr, create);
122 static inline int inetpeer_addr_cmp(const struct inetpeer_addr *a,
123 const struct inetpeer_addr *b)
127 if (a->family == AF_INET)
128 n = sizeof(a->a4) / sizeof(u32);
130 n = sizeof(a->a6) / sizeof(u32);
132 for (i = 0; i < n; i++) {
133 if (a->key[i] == b->key[i])
135 if (a->key[i] < b->key[i])
143 /* can be called from BH context or outside */
144 void inet_putpeer(struct inet_peer *p);
145 bool inet_peer_xrlim_allow(struct inet_peer *peer, int timeout);
147 void inetpeer_invalidate_tree(struct inet_peer_base *);
149 #endif /* _NET_INETPEER_H */