[linux.git] / include / net / dn_fib.h

#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];
	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 flowidn *fld,
			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 flowidn *fld,
			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 flowidn *fld,
					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 flowidn *fld, 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 */
Commit	Line	Data
1da177e4 LT	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	*/
fd2c3ef7	7	struct dn_kern_rta {
1da177e4 LT	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 {
a8731cbf	24	struct fib_rule *r;
1da177e4 LT	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;
c4ea94ab	39	__le16 nh_gw;
1da177e4 LT	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;
c4ea94ab	50	__le16 fib_prefsrc;
1da177e4 LT	51	__u32 fib_priority;
1da177e4 LT	52	__u32 fib_metrics[RTAX_MAX];
1da177e4 LT	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 {
c4ea94ab	69	__le16 datum;
1da177e4 LT	70	} dn_fib_key_t;
	71
	72	typedef struct {
c4ea94ab	73	__le16 datum;
1da177e4 LT	74	} dn_fib_hash_t;
	75
	76	typedef struct {
c4ea94ab	77	__u16 datum;
1da177e4 LT	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 {
abcab268	92	struct hlist_node hlist;
2dfe55b4	93	u32 n;
1da177e4 LT	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);
bef55aeb	101	int (lookup)(struct dn_fib_table t, const struct flowidn *fld,
1da177e4 LT	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,
bef55aeb	122	const struct flowidn *fld,
1da177e4 LT	123	struct dn_fib_res *res);
1da177e4 LT	124	extern void dn_fib_release_info(struct dn_fib_info *fi);
c4ea94ab	125	extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
1da177e4	126	extern void dn_fib_flush(void);
bef55aeb	127	extern void dn_fib_select_multipath(const struct flowidn *fld,
1da177e4	128	struct dn_fib_res *res);
1da177e4 LT	129
	130	/*
	131	* dn_tables.c
	132	*/
2dfe55b4	133	extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
1da177e4 LT	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);
c4ea94ab	143	extern unsigned dnet_addr_type(__le16 addr);
bef55aeb	144	extern int dn_fib_lookup(struct flowidn fld, struct dn_fib_res res);
1da177e4	145
1da177e4 LT	146	extern int dn_fib_dump(struct sk_buff skb, struct netlink_callback cb);
1da177e4 LT	147
1da177e4 LT	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)
a8731cbf	161	fib_rule_put(res->r);
1da177e4 LT	162	}
1da177e4 LT	163
1da177e4 LT	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
c4ea94ab	177	static inline __le16 dnet_make_mask(int n)
1da177e4	178	{
c4106aa8 HH	179	if (n)
	180	return cpu_to_le16(~((1 << (16 - n)) - 1));
	181	return cpu_to_le16(0);
1da177e4 LT	182	}
	183
	184	#endif /* _NET_DN_FIB_H */