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1 | #ifndef _NET_DN_FIB_H |
2 | #define _NET_DN_FIB_H |
3 | |
4 | /* WARNING: The ordering of these elements must match ordering |
5 | * of RTA_* rtnetlink attribute numbers. |
6 | */ |
7 | struct dn_kern_rta { |
8 | void *rta_dst; |
9 | void *rta_src; |
10 | int *rta_iif; |
11 | int *rta_oif; |
12 | void *rta_gw; |
13 | u32 *rta_priority; |
14 | void *rta_prefsrc; |
15 | struct rtattr *rta_mx; |
16 | struct rtattr *rta_mp; |
17 | unsigned char *rta_protoinfo; |
18 | u32 *rta_flow; |
19 | struct rta_cacheinfo *rta_ci; |
20 | struct rta_session *rta_sess; |
21 | }; |
22 | |
23 | struct dn_fib_res { |
24 | struct fib_rule *r; |
25 | struct dn_fib_info *fi; |
26 | unsigned char prefixlen; |
27 | unsigned char nh_sel; |
28 | unsigned char type; |
29 | unsigned char scope; |
30 | }; |
31 | |
32 | struct dn_fib_nh { |
33 | struct net_device *nh_dev; |
34 | unsigned nh_flags; |
35 | unsigned char nh_scope; |
36 | int nh_weight; |
37 | int nh_power; |
38 | int nh_oif; |
39 | __le16 nh_gw; |
40 | }; |
41 | |
42 | struct dn_fib_info { |
43 | struct dn_fib_info *fib_next; |
44 | struct dn_fib_info *fib_prev; |
45 | int fib_treeref; |
46 | atomic_t fib_clntref; |
47 | int fib_dead; |
48 | unsigned fib_flags; |
49 | int fib_protocol; |
50 | __le16 fib_prefsrc; |
51 | __u32 fib_priority; |
52 | __u32 fib_metrics[RTAX_MAX]; |
53 | int fib_nhs; |
54 | int fib_power; |
55 | struct dn_fib_nh fib_nh[0]; |
56 | #define dn_fib_dev fib_nh[0].nh_dev |
57 | }; |
58 | |
59 | |
60 | #define DN_FIB_RES_RESET(res) ((res).nh_sel = 0) |
61 | #define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel]) |
62 | |
63 | #define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res)) |
64 | #define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw) |
65 | #define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev) |
66 | #define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif) |
67 | |
68 | typedef struct { |
69 | __le16 datum; |
70 | } dn_fib_key_t; |
71 | |
72 | typedef struct { |
73 | __le16 datum; |
74 | } dn_fib_hash_t; |
75 | |
76 | typedef struct { |
77 | __u16 datum; |
78 | } dn_fib_idx_t; |
79 | |
80 | struct dn_fib_node { |
81 | struct dn_fib_node *fn_next; |
82 | struct dn_fib_info *fn_info; |
83 | #define DN_FIB_INFO(f) ((f)->fn_info) |
84 | dn_fib_key_t fn_key; |
85 | u8 fn_type; |
86 | u8 fn_scope; |
87 | u8 fn_state; |
88 | }; |
89 | |
90 | |
91 | struct dn_fib_table { |
92 | struct hlist_node hlist; |
93 | u32 n; |
94 | |
95 | int (*insert)(struct dn_fib_table *t, struct rtmsg *r, |
96 | struct dn_kern_rta *rta, struct nlmsghdr *n, |
97 | struct netlink_skb_parms *req); |
98 | int (*delete)(struct dn_fib_table *t, struct rtmsg *r, |
99 | struct dn_kern_rta *rta, struct nlmsghdr *n, |
100 | struct netlink_skb_parms *req); |
101 | int (*lookup)(struct dn_fib_table *t, const struct flowi *fl, |
102 | struct dn_fib_res *res); |
103 | int (*flush)(struct dn_fib_table *t); |
104 | int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb); |
105 | |
106 | unsigned char data[0]; |
107 | }; |
108 | |
109 | #ifdef CONFIG_DECNET_ROUTER |
110 | /* |
111 | * dn_fib.c |
112 | */ |
113 | extern void dn_fib_init(void); |
114 | extern void dn_fib_cleanup(void); |
115 | |
116 | extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd, |
117 | unsigned long arg); |
118 | extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, |
119 | struct dn_kern_rta *rta, |
120 | const struct nlmsghdr *nlh, int *errp); |
121 | extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi, |
122 | const struct flowi *fl, |
123 | struct dn_fib_res *res); |
124 | extern void dn_fib_release_info(struct dn_fib_info *fi); |
125 | extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type); |
126 | extern void dn_fib_flush(void); |
127 | extern void dn_fib_select_multipath(const struct flowi *fl, |
128 | struct dn_fib_res *res); |
129 | |
130 | /* |
131 | * dn_tables.c |
132 | */ |
133 | extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat); |
134 | extern struct dn_fib_table *dn_fib_empty_table(void); |
135 | extern void dn_fib_table_init(void); |
136 | extern void dn_fib_table_cleanup(void); |
137 | |
138 | /* |
139 | * dn_rules.c |
140 | */ |
141 | extern void dn_fib_rules_init(void); |
142 | extern void dn_fib_rules_cleanup(void); |
143 | extern unsigned dnet_addr_type(__le16 addr); |
144 | extern int dn_fib_lookup(struct flowi *fl, struct dn_fib_res *res); |
145 | |
146 | extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb); |
147 | |
148 | extern void dn_fib_free_info(struct dn_fib_info *fi); |
149 | |
150 | static inline void dn_fib_info_put(struct dn_fib_info *fi) |
151 | { |
152 | if (atomic_dec_and_test(&fi->fib_clntref)) |
153 | dn_fib_free_info(fi); |
154 | } |
155 | |
156 | static inline void dn_fib_res_put(struct dn_fib_res *res) |
157 | { |
158 | if (res->fi) |
159 | dn_fib_info_put(res->fi); |
160 | if (res->r) |
161 | fib_rule_put(res->r); |
162 | } |
163 | |
164 | #else /* Endnode */ |
165 | |
166 | #define dn_fib_init() do { } while(0) |
167 | #define dn_fib_cleanup() do { } while(0) |
168 | |
169 | #define dn_fib_lookup(fl, res) (-ESRCH) |
170 | #define dn_fib_info_put(fi) do { } while(0) |
171 | #define dn_fib_select_multipath(fl, res) do { } while(0) |
172 | #define dn_fib_rules_policy(saddr,res,flags) (0) |
173 | #define dn_fib_res_put(res) do { } while(0) |
174 | |
175 | #endif /* CONFIG_DECNET_ROUTER */ |
176 | |
177 | static inline __le16 dnet_make_mask(int n) |
178 | { |
179 | if (n) |
180 | return cpu_to_le16(~((1 << (16 - n)) - 1)); |
181 | return cpu_to_le16(0); |
182 | } |
183 | |
184 | #endif /* _NET_DN_FIB_H */ |
185 |
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