/* SPDX-License-Identifier: GPL-2.0 */#ifndef __NET_FIB_RULES_H#define __NET_FIB_RULES_H #include <linux/types.h>#include <linux/slab.h>#include <linux/netdevice.h>#include <linux/fib_rules.h>#include <linux/refcount.h>#include <net/flow.h>#include <net/rtnetlink.h>#include <net/fib_notifier.h>#include <linux/indirect_call_wrapper.h> struct fib_kuid_range {	kuid_t start;	kuid_t end;}; struct fib_rule {	struct list_head	list;	int			iifindex;	int			oifindex;	u32			mark;	u32			mark_mask;	u32			flags;	u32			table;	u8			action;	u8			l3mdev;	u8                      proto;	u8			ip_proto;	u32			target;	__be64			tun_id;	struct fib_rule __rcu	*ctarget;	struct net		*fr_net; 	refcount_t		refcnt;	u32			pref;	int			suppress_ifgroup;	int			suppress_prefixlen;	char			iifname[IFNAMSIZ];	char			oifname[IFNAMSIZ];	struct fib_kuid_range	uid_range;	struct fib_rule_port_range	sport_range;	struct fib_rule_port_range	dport_range;	struct rcu_head		rcu;}; struct fib_lookup_arg {	void			*lookup_ptr;	const void		*lookup_data;	void			*result;	struct fib_rule		*rule;	u32			table;	int			flags;#define FIB_LOOKUP_NOREF		1#define FIB_LOOKUP_IGNORE_LINKSTATE	2}; struct fib_rules_ops {	int			family;	struct list_head	list;	int			rule_size;	int			addr_size;	int			unresolved_rules;	int			nr_goto_rules;	unsigned int		fib_rules_seq; 	int			(*action)(struct fib_rule *,					  struct flowi *, int,					  struct fib_lookup_arg *);	bool			(*suppress)(struct fib_rule *,					    struct fib_lookup_arg *);	int			(*match)(struct fib_rule *,					 struct flowi *, int);	int			(*configure)(struct fib_rule *,					     struct sk_buff *,					     struct fib_rule_hdr *,					     struct nlattr **,					     struct netlink_ext_ack *);	int			(*delete)(struct fib_rule *);	int			(*compare)(struct fib_rule *,					   struct fib_rule_hdr *,					   struct nlattr **);	int			(*fill)(struct fib_rule *, struct sk_buff *,					struct fib_rule_hdr *);	size_t			(*nlmsg_payload)(struct fib_rule *); 	/* Called after modifications to the rules set, must flush	 * the route cache if one exists. */	void			(*flush_cache)(struct fib_rules_ops *ops); 	int			nlgroup;	const struct nla_policy	*policy;	struct list_head	rules_list;	struct module		*owner;	struct net		*fro_net;	struct rcu_head		rcu;}; struct fib_rule_notifier_info {	struct fib_notifier_info info; /* must be first */	struct fib_rule *rule;}; #define FRA_GENERIC_POLICY \	[FRA_UNSPEC]	= { .strict_start_type = FRA_DPORT_RANGE + 1 }, \	[FRA_IIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \	[FRA_OIFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \	[FRA_PRIORITY]	= { .type = NLA_U32 }, \	[FRA_FWMARK]	= { .type = NLA_U32 }, \	[FRA_TUN_ID]	= { .type = NLA_U64 }, \	[FRA_FWMASK]	= { .type = NLA_U32 }, \	[FRA_TABLE]     = { .type = NLA_U32 }, \	[FRA_SUPPRESS_PREFIXLEN] = { .type = NLA_U32 }, \	[FRA_SUPPRESS_IFGROUP] = { .type = NLA_U32 }, \	[FRA_GOTO]	= { .type = NLA_U32 }, \	[FRA_L3MDEV]	= { .type = NLA_U8 }, \	[FRA_UID_RANGE]	= { .len = sizeof(struct fib_rule_uid_range) }, \	[FRA_PROTOCOL]  = { .type = NLA_U8 }, \	[FRA_IP_PROTO]  = { .type = NLA_U8 }, \	[FRA_SPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }, \	[FRA_DPORT_RANGE] = { .len = sizeof(struct fib_rule_port_range) }  static inline void fib_rule_get(struct fib_rule *rule){	refcount_inc(&rule->refcnt);} static inline void fib_rule_put(struct fib_rule *rule){	if (refcount_dec_and_test(&rule->refcnt))		kfree_rcu(rule, rcu);} #ifdef CONFIG_NET_L3_MASTER_DEVstatic inline u32 fib_rule_get_table(struct fib_rule *rule,				     struct fib_lookup_arg *arg){	return rule->l3mdev ? arg->table : rule->table;}#elsestatic inline u32 fib_rule_get_table(struct fib_rule *rule,				     struct fib_lookup_arg *arg){	return rule->table;}#endif static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla){	if (nla[FRA_TABLE])		return nla_get_u32(nla[FRA_TABLE]);	return frh->table;} static inline bool fib_rule_port_range_set(const struct fib_rule_port_range *range){	return range->start != 0 && range->end != 0;} static inline bool fib_rule_port_inrange(const struct fib_rule_port_range *a,					 __be16 port){	return ntohs(port) >= a->start &&		ntohs(port) <= a->end;} static inline bool fib_rule_port_range_valid(const struct fib_rule_port_range *a){	return a->start != 0 && a->end != 0 && a->end < 0xffff &&		a->start <= a->end;} static inline bool fib_rule_port_range_compare(struct fib_rule_port_range *a,					       struct fib_rule_port_range *b){	return a->start == b->start &&		a->end == b->end;} static inline bool fib_rule_requires_fldissect(struct fib_rule *rule){	return rule->iifindex != LOOPBACK_IFINDEX && (rule->ip_proto ||		fib_rule_port_range_set(&rule->sport_range) ||		fib_rule_port_range_set(&rule->dport_range));} struct fib_rules_ops *fib_rules_register(const struct fib_rules_ops *,					 struct net *);void fib_rules_unregister(struct fib_rules_ops *); int fib_rules_lookup(struct fib_rules_ops *, struct flowi *, int flags,		     struct fib_lookup_arg *);int fib_default_rule_add(struct fib_rules_ops *, u32 pref, u32 table,			 u32 flags);bool fib_rule_matchall(const struct fib_rule *rule);int fib_rules_dump(struct net *net, struct notifier_block *nb, int family,		   struct netlink_ext_ack *extack);unsigned int fib_rules_seq_read(struct net *net, int family); int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr *nlh,		   struct netlink_ext_ack *extack);int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr *nlh,		   struct netlink_ext_ack *extack); INDIRECT_CALLABLE_DECLARE(int fib6_rule_match(struct fib_rule *rule,					    struct flowi *fl, int flags));INDIRECT_CALLABLE_DECLARE(int fib4_rule_match(struct fib_rule *rule,					    struct flowi *fl, int flags)); INDIRECT_CALLABLE_DECLARE(int fib6_rule_action(struct fib_rule *rule,			    struct flowi *flp, int flags,			    struct fib_lookup_arg *arg));INDIRECT_CALLABLE_DECLARE(int fib4_rule_action(struct fib_rule *rule,			    struct flowi *flp, int flags,			    struct fib_lookup_arg *arg)); INDIRECT_CALLABLE_DECLARE(bool fib6_rule_suppress(struct fib_rule *rule,						struct fib_lookup_arg *arg));INDIRECT_CALLABLE_DECLARE(bool fib4_rule_suppress(struct fib_rule *rule,						struct fib_lookup_arg *arg));#endif