1#ifndef _NET_DN_FIB_H
  2#define _NET_DN_FIB_H
  3
  4#include <linux/netlink.h>
  5
  6extern const struct nla_policy rtm_dn_policy[];
  7
  8struct 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
 17struct 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
 27struct 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
 53typedef struct {
 54	__le16	datum;
 55} dn_fib_key_t;
 56
 57typedef struct {
 58	__le16	datum;
 59} dn_fib_hash_t;
 60
 61typedef struct {
 62	__u16	datum;
 63} dn_fib_idx_t;
 64
 65struct 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
 76struct 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 */
 98void dn_fib_init(void);
 99void dn_fib_cleanup(void);
100
101int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
102struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
103				       struct nlattr *attrs[],
104				       const struct nlmsghdr *nlh, int *errp);
105int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
106			  const struct flowidn *fld, struct dn_fib_res *res);
107void dn_fib_release_info(struct dn_fib_info *fi);
108void dn_fib_flush(void);
109void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);
110
111/*
112 * dn_tables.c
113 */
114struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
115struct dn_fib_table *dn_fib_empty_table(void);
116void dn_fib_table_init(void);
117void dn_fib_table_cleanup(void);
118
119/*
120 * dn_rules.c
121 */
122void dn_fib_rules_init(void);
123void dn_fib_rules_cleanup(void);
124unsigned int dnet_addr_type(__le16 addr);
125int dn_fib_lookup(struct flowidn *fld, struct dn_fib_res *res);
126
127int dn_fib_dump(struct sk_buff *skb, struct netlink_callback *cb);
128
129void dn_fib_free_info(struct dn_fib_info *fi);
130
131static 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
137static 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
158static 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 */