/* 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[];}; #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 */