[IPV6]: ROUTE: Eliminate lock for default route pointer.
[linux-2.6.git] / include / net / ip6_route.h
1 #ifndef _NET_IP6_ROUTE_H
2 #define _NET_IP6_ROUTE_H
3
4 #define IP6_RT_PRIO_FW          16
5 #define IP6_RT_PRIO_USER        1024
6 #define IP6_RT_PRIO_ADDRCONF    256
7 #define IP6_RT_PRIO_KERN        512
8 #define IP6_RT_FLOW_MASK        0x00ff
9
10 #ifdef __KERNEL__
11
12 #include <net/flow.h>
13 #include <net/ip6_fib.h>
14 #include <net/sock.h>
15 #include <linux/ip.h>
16 #include <linux/ipv6.h>
17
18 struct pol_chain {
19         int                     type;
20         int                     priority;
21         struct fib6_node        *rules;
22         struct pol_chain        *next;
23 };
24
25 extern struct rt6_info  ip6_null_entry;
26
27 extern int ip6_rt_gc_interval;
28
29 extern void                     ip6_route_input(struct sk_buff *skb);
30
31 extern struct dst_entry *       ip6_route_output(struct sock *sk,
32                                                  struct flowi *fl);
33
34 extern int                      ip6_route_me_harder(struct sk_buff *skb);
35
36 extern void                     ip6_route_init(void);
37 extern void                     ip6_route_cleanup(void);
38
39 extern int                      ipv6_route_ioctl(unsigned int cmd, void __user *arg);
40
41 extern int                      ip6_route_add(struct in6_rtmsg *rtmsg,
42                                               struct nlmsghdr *,
43                                               void *rtattr,
44                                               struct netlink_skb_parms *req);
45 extern int                      ip6_ins_rt(struct rt6_info *,
46                                            struct nlmsghdr *,
47                                            void *rtattr,
48                                            struct netlink_skb_parms *req);
49 extern int                      ip6_del_rt(struct rt6_info *,
50                                            struct nlmsghdr *,
51                                            void *rtattr,
52                                            struct netlink_skb_parms *req);
53
54 extern int                      ip6_rt_addr_add(struct in6_addr *addr,
55                                                 struct net_device *dev,
56                                                 int anycast);
57
58 extern int                      ip6_rt_addr_del(struct in6_addr *addr,
59                                                 struct net_device *dev);
60
61 extern void                     rt6_sndmsg(int type, struct in6_addr *dst,
62                                            struct in6_addr *src,
63                                            struct in6_addr *gw,
64                                            struct net_device *dev, 
65                                            int dstlen, int srclen,
66                                            int metric, __u32 flags);
67
68 extern struct rt6_info          *rt6_lookup(struct in6_addr *daddr,
69                                             struct in6_addr *saddr,
70                                             int oif, int flags);
71
72 extern struct dst_entry *ndisc_dst_alloc(struct net_device *dev,
73                                          struct neighbour *neigh,
74                                          struct in6_addr *addr,
75                                          int (*output)(struct sk_buff *));
76 extern int ndisc_dst_gc(int *more);
77 extern void fib6_force_start_gc(void);
78
79 extern struct rt6_info *addrconf_dst_alloc(struct inet6_dev *idev,
80                                            const struct in6_addr *addr,
81                                            int anycast);
82
83 /*
84  *      support functions for ND
85  *
86  */
87 extern struct rt6_info *        rt6_get_dflt_router(struct in6_addr *addr,
88                                                     struct net_device *dev);
89 extern struct rt6_info *        rt6_add_dflt_router(struct in6_addr *gwaddr,
90                                                     struct net_device *dev);
91
92 extern void                     rt6_purge_dflt_routers(void);
93
94 extern void                     rt6_redirect(struct in6_addr *dest,
95                                              struct in6_addr *saddr,
96                                              struct neighbour *neigh,
97                                              u8 *lladdr,
98                                              int on_link);
99
100 extern void                     rt6_pmtu_discovery(struct in6_addr *daddr,
101                                                    struct in6_addr *saddr,
102                                                    struct net_device *dev,
103                                                    u32 pmtu);
104
105 struct nlmsghdr;
106 struct netlink_callback;
107 extern int inet6_dump_fib(struct sk_buff *skb, struct netlink_callback *cb);
108 extern int inet6_rtm_newroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
109 extern int inet6_rtm_delroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
110 extern int inet6_rtm_getroute(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg);
111
112 extern void rt6_ifdown(struct net_device *dev);
113 extern void rt6_mtu_change(struct net_device *dev, unsigned mtu);
114
115 extern rwlock_t rt6_lock;
116
117 /*
118  *      Store a destination cache entry in a socket
119  */
120 static inline void ip6_dst_store(struct sock *sk, struct dst_entry *dst,
121                                      struct in6_addr *daddr)
122 {
123         struct ipv6_pinfo *np = inet6_sk(sk);
124         struct rt6_info *rt = (struct rt6_info *) dst;
125
126         write_lock(&sk->sk_dst_lock);
127         __sk_dst_set(sk, dst);
128         np->daddr_cache = daddr;
129         np->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
130         write_unlock(&sk->sk_dst_lock);
131 }
132
133 static inline int ipv6_unicast_destination(struct sk_buff *skb)
134 {
135         struct rt6_info *rt = (struct rt6_info *) skb->dst;
136
137         return rt->rt6i_flags & RTF_LOCAL;
138 }
139
140 #endif
141 #endif