1 #ifndef _NET_DN_FIB_H
2 #define _NET_DN_FIB_H
3
4 #include <linux/netlink.h>
5
6 extern const struct nla_policy rtm_dn_policy[];
7
8 struct dn_fib_res {
9 struct fib_rule *r;
10 struct dn_fib_info *fi;
11 unsigned char prefixlen;
12 unsigned char nh_sel;
13 unsigned char type;
14 unsigned char scope;
15 };
16
17 struct dn_fib_nh {
18 struct net_device *nh_dev;
19 unsigned int nh_flags;
20 unsigned char nh_scope;
21 int nh_weight;
22 int nh_power;
23 int nh_oif;
24 __le16 nh_gw;
25 };
26
27 struct dn_fib_info {
28 struct dn_fib_info *fib_next;
29 struct dn_fib_info *fib_prev;
30 int fib_treeref;
31 atomic_t fib_clntref;
32 int fib_dead;
33 unsigned int fib_flags;
34 int fib_protocol;
35 __le16 fib_prefsrc;
36 __u32 fib_priority;
37 __u32 fib_metrics[RTAX_MAX];
38 int fib_nhs;
39 int fib_power;
40 struct dn_fib_nh fib_nh[0];
41 #define dn_fib_dev fib_nh[0].nh_dev
42 };
43
44
45 #define DN_FIB_RES_RESET(res) ((res).nh_sel = 0)
46 #define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
47
48 #define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
49 #define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw)
50 #define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev)
51 #define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif)
52
53 typedef struct {
54 __le16 datum;
55 } dn_fib_key_t;
56
57 typedef struct {
58 __le16 datum;
59 } dn_fib_hash_t;
60
61 typedef struct {
62 __u16 datum;
63 } dn_fib_idx_t;
64
65 struct dn_fib_node {
66 struct dn_fib_node *fn_next;
67 struct dn_fib_info *fn_info;
68 #define DN_FIB_INFO(f) ((f)->fn_info)
69 dn_fib_key_t fn_key;
70 u8 fn_type;
71 u8 fn_scope;
72 u8 fn_state;
73 };
74
75
76 struct dn_fib_table {
77 struct hlist_node hlist;
78 u32 n;
79
80 int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
81 struct nlattr *attrs[], struct nlmsghdr *n,
82 struct netlink_skb_parms *req);
83 int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
84 struct nlattr *attrs[], struct nlmsghdr *n,
85 struct netlink_skb_parms *req);
86 int (*lookup)(struct dn_fib_table *t, const struct flowidn *fld,
87 struct dn_fib_res *res);
88 int (*flush)(struct dn_fib_table *t);
89 int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
90
91 unsigned char data[0];
92 };
93
94 #ifdef CONFIG_DECNET_ROUTER
95 /*
96 * dn_fib.c
97 */
98 void dn_fib_init(void);
99 void dn_fib_cleanup(void);
100
101 int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
102 struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
103 struct nlattr *attrs[],
104 const struct nlmsghdr *nlh, int *errp);
105 int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
106 const struct flowidn *fld, struct dn_fib_res *res);
107 void dn_fib_release_info(struct dn_fib_info *fi);
108 void dn_fib_flush(void);
109 void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
110
111 /*
112 * dn_tables.c
113 */
114 struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
115 struct dn_fib_table *dn_fib_empty_table(void);
116 void dn_fib_table_init(void);
117 void dn_fib_table_cleanup(void);
118
119 /*
120 * dn_rules.c
121 */
122 void dn_fib_rules_init(void);
123 void dn_fib_rules_cleanup(void);
124 unsigned int dnet_addr_type(__le16 addr);
125 int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
126
127 int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
128
129 void dn_fib_free_info(struct dn_fib_info *fi);
130
dn_fib_info_put(struct dn_fib_info * fi)131 static inline void dn_fib_info_put(struct dn_fib_info *fi)
132 {
133 if (atomic_dec_and_test(&fi->fib_clntref))
134 dn_fib_free_info(fi);
135 }
136
dn_fib_res_put(struct dn_fib_res * res)137 static inline void dn_fib_res_put(struct dn_fib_res *res)
138 {
139 if (res->fi)
140 dn_fib_info_put(res->fi);
141 if (res->r)
142 fib_rule_put(res->r);
143 }
144
145 #else /* Endnode */
146
147 #define dn_fib_init() do { } while(0)
148 #define dn_fib_cleanup() do { } while(0)
149
150 #define dn_fib_lookup(fl, res) (-ESRCH)
151 #define dn_fib_info_put(fi) do { } while(0)
152 #define dn_fib_select_multipath(fl, res) do { } while(0)
153 #define dn_fib_rules_policy(saddr,res,flags) (0)
154 #define dn_fib_res_put(res) do { } while(0)
155
156 #endif /* CONFIG_DECNET_ROUTER */
157
dnet_make_mask(int n)158 static inline __le16 dnet_make_mask(int n)
159 {
160 if (n)
161 return cpu_to_le16(~((1 << (16 - n)) - 1));
162 return cpu_to_le16(0);
163 }
164
165 #endif /* _NET_DN_FIB_H */
166