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 */
7struct dn_kern_rta
8{
9        void            *rta_dst;
10        void            *rta_src;
11        int             *rta_iif;
12        int             *rta_oif;
13        void            *rta_gw;
14        u32             *rta_priority;
15        void            *rta_prefsrc;
16        struct rtattr   *rta_mx;
17        struct rtattr   *rta_mp;
18        unsigned char   *rta_protoinfo;
19        u32             *rta_flow;
20        struct rta_cacheinfo *rta_ci;
21	struct rta_session *rta_sess;
22};
23
24struct dn_fib_res {
25	struct fib_rule *r;
26	struct dn_fib_info *fi;
27	unsigned char prefixlen;
28	unsigned char nh_sel;
29	unsigned char type;
30	unsigned char scope;
31};
32
33struct dn_fib_nh {
34	struct net_device	*nh_dev;
35	unsigned		nh_flags;
36	unsigned char		nh_scope;
37	int			nh_weight;
38	int			nh_power;
39	int			nh_oif;
40	__le16			nh_gw;
41};
42
43struct dn_fib_info {
44	struct dn_fib_info	*fib_next;
45	struct dn_fib_info	*fib_prev;
46	int 			fib_treeref;
47	atomic_t		fib_clntref;
48	int			fib_dead;
49	unsigned		fib_flags;
50	int			fib_protocol;
51	__le16			fib_prefsrc;
52	__u32			fib_priority;
53	__u32			fib_metrics[RTAX_MAX];
54#define dn_fib_mtu  fib_metrics[RTAX_MTU-1]
55#define dn_fib_window fib_metrics[RTAX_WINDOW-1]
56#define dn_fib_rtt fib_metrics[RTAX_RTT-1]
57#define dn_fib_advmss fib_metrics[RTAX_ADVMSS-1]
58	int			fib_nhs;
59	int			fib_power;
60	struct dn_fib_nh	fib_nh[0];
61#define dn_fib_dev		fib_nh[0].nh_dev
62};
63
64
65#define DN_FIB_RES_RESET(res)	((res).nh_sel = 0)
66#define DN_FIB_RES_NH(res)	((res).fi->fib_nh[(res).nh_sel])
67
68#define DN_FIB_RES_PREFSRC(res)	((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
69#define DN_FIB_RES_GW(res)	(DN_FIB_RES_NH(res).nh_gw)
70#define DN_FIB_RES_DEV(res)	(DN_FIB_RES_NH(res).nh_dev)
71#define DN_FIB_RES_OIF(res)	(DN_FIB_RES_NH(res).nh_oif)
72
73typedef struct {
74	__le16	datum;
75} dn_fib_key_t;
76
77typedef struct {
78	__le16	datum;
79} dn_fib_hash_t;
80
81typedef struct {
82	__u16	datum;
83} dn_fib_idx_t;
84
85struct dn_fib_node {
86	struct dn_fib_node *fn_next;
87	struct dn_fib_info *fn_info;
88#define DN_FIB_INFO(f) ((f)->fn_info)
89	dn_fib_key_t	fn_key;
90	u8		fn_type;
91	u8		fn_scope;
92	u8		fn_state;
93};
94
95
96struct dn_fib_table {
97	struct hlist_node hlist;
98	u32 n;
99
100	int (*insert)(struct dn_fib_table *t, struct rtmsg *r,
101			struct dn_kern_rta *rta, struct nlmsghdr *n,
102			struct netlink_skb_parms *req);
103	int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
104			struct dn_kern_rta *rta, struct nlmsghdr *n,
105			struct netlink_skb_parms *req);
106	int (*lookup)(struct dn_fib_table *t, const struct flowi *fl,
107			struct dn_fib_res *res);
108	int (*flush)(struct dn_fib_table *t);
109	int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);
110
111	unsigned char data[0];
112};
113
114#ifdef CONFIG_DECNET_ROUTER
115/*
116 * dn_fib.c
117 */
118extern void dn_fib_init(void);
119extern void dn_fib_cleanup(void);
120
121extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd,
122			unsigned long arg);
123extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
124				struct dn_kern_rta *rta,
125				const struct nlmsghdr *nlh, int *errp);
126extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
127			const struct flowi *fl,
128			struct dn_fib_res *res);
129extern void dn_fib_release_info(struct dn_fib_info *fi);
130extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
131extern void dn_fib_flush(void);
132extern void dn_fib_select_multipath(const struct flowi *fl,
133					struct dn_fib_res *res);
134
135/*
136 * dn_tables.c
137 */
138extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
139extern struct dn_fib_table *dn_fib_empty_table(void);
140extern void dn_fib_table_init(void);
141extern void dn_fib_table_cleanup(void);
142
143/*
144 * dn_rules.c
145 */
146extern void dn_fib_rules_init(void);
147extern void dn_fib_rules_cleanup(void);
148extern unsigned dnet_addr_type(__le16 addr);
149extern int dn_fib_lookup(struct flowi *fl, struct dn_fib_res *res);
150
151extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
152
153extern void dn_fib_free_info(struct dn_fib_info *fi);
154
155static inline void dn_fib_info_put(struct dn_fib_info *fi)
156{
157	if (atomic_dec_and_test(&fi->fib_clntref))
158		dn_fib_free_info(fi);
159}
160
161static inline void dn_fib_res_put(struct dn_fib_res *res)
162{
163	if (res->fi)
164		dn_fib_info_put(res->fi);
165	if (res->r)
166		fib_rule_put(res->r);
167}
168
169#else /* Endnode */
170
171#define dn_fib_init()  do { } while(0)
172#define dn_fib_cleanup() do { } while(0)
173
174#define dn_fib_lookup(fl, res) (-ESRCH)
175#define dn_fib_info_put(fi) do { } while(0)
176#define dn_fib_select_multipath(fl, res) do { } while(0)
177#define dn_fib_rules_policy(saddr,res,flags) (0)
178#define dn_fib_res_put(res) do { } while(0)
179
180#endif /* CONFIG_DECNET_ROUTER */
181
182static inline __le16 dnet_make_mask(int n)
183{
184        if (n)
185                return dn_htons(~((1<<(16-n))-1));
186        return 0;
187}
188
189#endif /* _NET_DN_FIB_H */
190