[net-next-2.6.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];
#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 dn_htons(~((1<<(16-n))-1));
        return 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	*/
	7	struct 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
	24	struct dn_fib_res {
a8731cbf	25	struct fib_rule *r;
1da177e4 LT	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
	33	struct 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;
c4ea94ab	40	__le16 nh_gw;
1da177e4 LT	41	};
	42
	43	struct 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;
c4ea94ab	51	__le16 fib_prefsrc;
1da177e4 LT	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
	73	typedef struct {
c4ea94ab	74	__le16 datum;
1da177e4 LT	75	} dn_fib_key_t;
	76
	77	typedef struct {
c4ea94ab	78	__le16 datum;
1da177e4 LT	79	} dn_fib_hash_t;
	80
	81	typedef struct {
c4ea94ab	82	__u16 datum;
1da177e4 LT	83	} dn_fib_idx_t;
	84
	85	struct 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
	96	struct dn_fib_table {
abcab268	97	struct hlist_node hlist;
2dfe55b4	98	u32 n;
1da177e4 LT	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	*/
	118	extern void dn_fib_init(void);
	119	extern void dn_fib_cleanup(void);
	120
	121	extern int dn_fib_ioctl(struct socket *sock, unsigned int cmd,
	122	unsigned long arg);
	123	extern 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);
	126	extern int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
	127	const struct flowi *fl,
	128	struct dn_fib_res *res);
	129	extern void dn_fib_release_info(struct dn_fib_info *fi);
c4ea94ab	130	extern __le16 dn_fib_get_attr16(struct rtattr *attr, int attrlen, int type);
1da177e4 LT	131	extern void dn_fib_flush(void);
	132	extern void dn_fib_select_multipath(const struct flowi *fl,
	133	struct dn_fib_res *res);
1da177e4 LT	134
	135	/*
	136	* dn_tables.c
	137	*/
2dfe55b4	138	extern struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
1da177e4 LT	139	extern struct dn_fib_table *dn_fib_empty_table(void);
	140	extern void dn_fib_table_init(void);
	141	extern void dn_fib_table_cleanup(void);
	142
	143	/*
	144	* dn_rules.c
	145	*/
	146	extern void dn_fib_rules_init(void);
	147	extern void dn_fib_rules_cleanup(void);
c4ea94ab	148	extern unsigned dnet_addr_type(__le16 addr);
a8731cbf	149	extern int dn_fib_lookup(struct flowi fl, struct dn_fib_res res);
1da177e4	150
1da177e4 LT	151	extern int dn_fib_dump(struct sk_buff skb, struct netlink_callback cb);
1da177e4 LT	152
1da177e4 LT	153	extern void dn_fib_free_info(struct dn_fib_info *fi);
	154
	155	static 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
	161	static 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)
a8731cbf	166	fib_rule_put(res->r);
1da177e4 LT	167	}
1da177e4 LT	168
1da177e4 LT	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
c4ea94ab	182	static inline __le16 dnet_make_mask(int n)
1da177e4 LT	183	{
1da177e4 LT	184	if (n)
c4ea94ab	185	return dn_htons(~((1<<(16-n))-1));
1da177e4 LT	186	return 0;
	187	}
	188
	189	#endif /* _NET_DN_FIB_H */