[mirror_ubuntu-eoan-kernel.git] / include / net / dn_fib.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NET_DN_FIB_H
#define _NET_DN_FIB_H

#include <linux/netlink.h>
#include <linux/refcount.h>

extern const struct nla_policy rtm_dn_policy[];

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 int		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;
	refcount_t		fib_clntref;
	int			fib_dead;
	unsigned int		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 nlattr *attrs[], struct nlmsghdr *n,
			struct netlink_skb_parms *req);
	int (*delete)(struct dn_fib_table *t, struct rtmsg *r,
			struct nlattr *attrs[], 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
 */
void dn_fib_init(void);
void dn_fib_cleanup(void);

int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
struct dn_fib_info *dn_fib_create_info(const struct rtmsg *r,
				       struct nlattr *attrs[],
				       const struct nlmsghdr *nlh, int *errp);
int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
			  const struct flowidn *fld, struct dn_fib_res *res);
void dn_fib_release_info(struct dn_fib_info *fi);
void dn_fib_flush(void);
void dn_fib_select_multipath(const struct flowidn *fld, struct dn_fib_res *res);

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

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

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

void dn_fib_free_info(struct dn_fib_info *fi);

static inline void dn_fib_info_put(struct dn_fib_info *fi)
{
	if (refcount_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
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _NET_DN_FIB_H
	3	#define _NET_DN_FIB_H
	4
	5	#include <linux/netlink.h>
	6	#include <linux/refcount.h>
	7
	8	extern const struct nla_policy rtm_dn_policy[];
	9
	10	struct dn_fib_res {
	11	struct fib_rule *r;
	12	struct dn_fib_info *fi;
	13	unsigned char prefixlen;
	14	unsigned char nh_sel;
	15	unsigned char type;
	16	unsigned char scope;
	17	};
	18
	19	struct dn_fib_nh {
	20	struct net_device *nh_dev;
	21	unsigned int nh_flags;
	22	unsigned char nh_scope;
	23	int nh_weight;
	24	int nh_power;
	25	int nh_oif;
	26	__le16 nh_gw;
	27	};
	28
	29	struct dn_fib_info {
	30	struct dn_fib_info *fib_next;
	31	struct dn_fib_info *fib_prev;
	32	int fib_treeref;
	33	refcount_t fib_clntref;
	34	int fib_dead;
	35	unsigned int fib_flags;
	36	int fib_protocol;
	37	__le16 fib_prefsrc;
	38	__u32 fib_priority;
	39	__u32 fib_metrics[RTAX_MAX];
	40	int fib_nhs;
	41	int fib_power;
	42	struct dn_fib_nh fib_nh[0];
	43	#define dn_fib_dev fib_nh[0].nh_dev
	44	};
	45
	46
	47	#define DN_FIB_RES_RESET(res) ((res).nh_sel = 0)
	48	#define DN_FIB_RES_NH(res) ((res).fi->fib_nh[(res).nh_sel])
	49
	50	#define DN_FIB_RES_PREFSRC(res) ((res).fi->fib_prefsrc ? : __dn_fib_res_prefsrc(&res))
	51	#define DN_FIB_RES_GW(res) (DN_FIB_RES_NH(res).nh_gw)
	52	#define DN_FIB_RES_DEV(res) (DN_FIB_RES_NH(res).nh_dev)
	53	#define DN_FIB_RES_OIF(res) (DN_FIB_RES_NH(res).nh_oif)
	54
	55	typedef struct {
	56	__le16 datum;
	57	} dn_fib_key_t;
	58
	59	typedef struct {
	60	__le16 datum;
	61	} dn_fib_hash_t;
	62
	63	typedef struct {
	64	__u16 datum;
	65	} dn_fib_idx_t;
	66
	67	struct dn_fib_node {
	68	struct dn_fib_node *fn_next;
	69	struct dn_fib_info *fn_info;
	70	#define DN_FIB_INFO(f) ((f)->fn_info)
	71	dn_fib_key_t fn_key;
	72	u8 fn_type;
	73	u8 fn_scope;
	74	u8 fn_state;
	75	};
	76
	77
	78	struct dn_fib_table {
	79	struct hlist_node hlist;
	80	u32 n;
	81
	82	int (insert)(struct dn_fib_table t, struct rtmsg *r,
	83	struct nlattr attrs[], struct nlmsghdr n,
	84	struct netlink_skb_parms *req);
	85	int (delete)(struct dn_fib_table t, struct rtmsg *r,
	86	struct nlattr attrs[], struct nlmsghdr n,
	87	struct netlink_skb_parms *req);
	88	int (lookup)(struct dn_fib_table t, const struct flowidn *fld,
	89	struct dn_fib_res *res);
	90	int (flush)(struct dn_fib_table t);
	91	int (dump)(struct dn_fib_table t, struct sk_buff skb, struct netlink_callback cb);
	92
	93	unsigned char data[0];
	94	};
	95
	96	#ifdef CONFIG_DECNET_ROUTER
	97	/*
	98	* dn_fib.c
	99	*/
	100	void dn_fib_init(void);
	101	void dn_fib_cleanup(void);
	102
	103	int dn_fib_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg);
	104	struct dn_fib_info dn_fib_create_info(const struct rtmsg r,
	105	struct nlattr *attrs[],
	106	const struct nlmsghdr nlh, int errp);
	107	int dn_fib_semantic_match(int type, struct dn_fib_info *fi,
	108	const struct flowidn fld, struct dn_fib_res res);
	109	void dn_fib_release_info(struct dn_fib_info *fi);
	110	void dn_fib_flush(void);
	111	void dn_fib_select_multipath(const struct flowidn fld, struct dn_fib_res res);
	112
	113	/*
	114	* dn_tables.c
	115	*/
	116	struct dn_fib_table *dn_fib_get_table(u32 n, int creat);
	117	struct dn_fib_table *dn_fib_empty_table(void);
	118	void dn_fib_table_init(void);
	119	void dn_fib_table_cleanup(void);
	120
	121	/*
	122	* dn_rules.c
	123	*/
	124	void dn_fib_rules_init(void);
	125	void dn_fib_rules_cleanup(void);
	126	unsigned int dnet_addr_type(__le16 addr);
	127	int dn_fib_lookup(struct flowidn fld, struct dn_fib_res res);
	128
	129	int dn_fib_dump(struct sk_buff skb, struct netlink_callback cb);
	130
	131	void dn_fib_free_info(struct dn_fib_info *fi);
	132
	133	static inline void dn_fib_info_put(struct dn_fib_info *fi)
	134	{
	135	if (refcount_dec_and_test(&fi->fib_clntref))
	136	dn_fib_free_info(fi);
	137	}
	138
	139	static inline void dn_fib_res_put(struct dn_fib_res *res)
	140	{
	141	if (res->fi)
	142	dn_fib_info_put(res->fi);
	143	if (res->r)
	144	fib_rule_put(res->r);
	145	}
	146
	147	#else /* Endnode */
	148
	149	#define dn_fib_init() do { } while(0)
	150	#define dn_fib_cleanup() do { } while(0)
	151
	152	#define dn_fib_lookup(fl, res) (-ESRCH)
	153	#define dn_fib_info_put(fi) do { } while(0)
	154	#define dn_fib_select_multipath(fl, res) do { } while(0)
	155	#define dn_fib_rules_policy(saddr,res,flags) (0)
	156	#define dn_fib_res_put(res) do { } while(0)
	157
	158	#endif /* CONFIG_DECNET_ROUTER */
	159
	160	static inline __le16 dnet_make_mask(int n)
	161	{
	162	if (n)
	163	return cpu_to_le16(~((1 << (16 - n)) - 1));
	164	return cpu_to_le16(0);
	165	}
	166
	167	#endif /* _NET_DN_FIB_H */