aboutsummaryrefslogtreecommitdiffstats
path: root/include/net/dn_fib.h
blob: c378be7bf96002118edcd65d2aa2be87ba842e7d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
#ifndef _NET_DN_FIB_H
#define _NET_DN_FIB_H

/* WARNING: The ordering of these elements must match ordering
 *          of RTA_* rtnetlink attribute numbers.
 */
struct dn_kern_rta
{
        void            *rta_dst;
        void            *rta_src;
        int             *rta_iif;
        int             *rta_oif;
        void            *rta_gw;
        u32             *rta_priority;
        void            *rta_prefsrc;
        struct rtattr   *rta_mx;
        struct rtattr   *rta_mp;
        unsigned char   *rta_protoinfo;
        u32             *rta_flow;
        struct rta_cacheinfo *rta_ci;
	struct rta_session *rta_sess;
};

struct dn_fib_res {
	struct fib_rule *r;
	struct dn_fib_info *fi;
	unsigned char prefixlen;
	unsigned char nh_sel;
	unsigned char type;
	unsigned char scope;
};

struct dn_fib_nh {
	struct net_device	*nh_dev;
	unsigned		nh_flags;
	unsigned char		nh_scope;
	int			nh_weight;
	int			nh_power;
	int			nh_oif;
	__le16			nh_gw;
};

struct dn_fib_info {
	struct dn_fib_info	*fib_next;
	struct dn_fib_info	*fib_prev;
	int 			fib_treeref;
	atomic_t		fib_clntref;
	int			fib_dead;
	unsigned		fib_flags;
	int			fib_protocol;
	__le16			fib_prefsrc;
	__u32			fib_priority;
	__u32			fib_metrics[RTAX_MAX];
#define dn_fib_mtu  fib_metrics[RTAX_MTU-1]
#define dn_fib_window fib_metrics[RTAX_WINDOW-1]
#define dn_fib_rtt fib_metrics[RTAX_RTT-1]
#define dn_fib_advmss fib_metrics[RTAX_ADVMSS-1]
	int			fib_nhs;
	int			fib_power;
	struct dn_fib_nh	fib_nh[0];
#define dn_fib_dev		fib_nh[0].nh_dev
};


#define DN_FIB_RES_RESET(res)	((res).nh_sel = 0)
#define DN_FIB_RES_NH(res)	((res).fi->fib_nh[(res).nh_sel])

#define DN_FIB_RES_PREFSRC(res)	((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
#define DN_FIB_RES_GW(res)	(DN_FIB_RES_NH(res).nh_gw)
#define DN_FIB_RES_DEV(res)	(DN_FIB_RES_NH(res).nh_dev)
#define DN_FIB_RES_OIF(res)	(DN_FIB_RES_NH(res).nh_oif)

typedef struct {
	__le16	datum;
} dn_fib_key_t;

typedef struct {
	__le16	datum;
} dn_fib_hash_t;

typedef struct {
	__u16	datum;
} dn_fib_idx_t;

struct dn_fib_node {
	struct dn_fib_node *fn_next;
	struct dn_fib_info *fn_info;
#define DN_FIB_INFO(f) ((f)->fn_info)
	dn_fib_key_t	fn_key;
	u8		fn_type;
	u8		fn_scope;
	u8		fn_state;
};


struct dn_fib_table {
	struct hlist_node hlist;
	u32 n;

	int (*insert)(struct dn_fib_table *t, struct rtmsg *r, 
			struct dn_kern_rta *rta, struct nlmsghdr *n, 
			struct netlink_skb_parms *req);
	int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
			struct dn_kern_rta *rta, struct nlmsghdr *n,
			struct netlink_skb_parms *req);
	int (*lookup)(struct dn_fib_table *t, const struct flowi *fl,
			struct dn_fib_res *res);
	int (*flush)(struct dn_fib_table *t);
	int (*dump)(struct dn_fib_table *t, struct sk_buff *skb, struct netlink_callback *cb);

	unsigned char data[0];
};

#ifdef CONFIG_DECNET_ROUTER
/*
 * dn_fib.c
 */
extern void dn_fib_init(void);
extern void dn_fib_cleanup(void);

extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd, 
			unsigned long arg);
extern struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r, 
				struct dn_kern_rta *rta, 
				const struct nlmsghdr *nlh, int *errp);
extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi, 
			const struct flowi *fl,
			struct dn_fib_res *res);
extern void dn_fib_release_info(struct dn_fib_info *fi);
extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
extern void dn_fib_flush(void);
extern void dn_fib_select_multipath(const struct flowi *fl,
					struct dn_fib_res *res);

/*
 * dn_tables.c
 */
extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
extern struct dn_fib_table *dn_fib_empty_table(void);
extern void dn_fib_table_init(void);
extern void dn_fib_table_cleanup(void);

/*
 * dn_rules.c
 */
extern void dn_fib_rules_init(void);
extern void dn_fib_rules_cleanup(void);
extern unsigned dnet_addr_type(__le16 addr);
extern int dn_fib_lookup(struct flowi *fl, struct dn_fib_res *res);

extern int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);

extern void dn_fib_free_info(struct dn_fib_info *fi);

static inline void dn_fib_info_put(struct dn_fib_info *fi)
{
	if (atomic_dec_and_test(&fi->fib_clntref))
		dn_fib_free_info(fi);
}

static inline void dn_fib_res_put(struct dn_fib_res *res)
{
	if (res->fi)
		dn_fib_info_put(res->fi);
	if (res->r)
		fib_rule_put(res->r);
}

#else /* Endnode */

#define dn_fib_init()  do { } while(0)
#define dn_fib_cleanup() do { } while(0)

#define dn_fib_lookup(fl, res) (-ESRCH)
#define dn_fib_info_put(fi) do { } while(0)
#define dn_fib_select_multipath(fl, res) do { } while(0)
#define dn_fib_rules_policy(saddr,res,flags) (0)
#define dn_fib_res_put(res) do { } while(0)

#endif /* CONFIG_DECNET_ROUTER */

static inline __le16 dnet_make_mask(int n)
{
	if (n)
		return cpu_to_le16(~((1 << (16 - n)) - 1));
	return cpu_to_le16(0);
}

#endif /* _NET_DN_FIB_H */