[net-next-2.6.git] / include / net / fib_rules.h

#ifndef __NET_FIB_RULES_H
#define __NET_FIB_RULES_H

#include <linux/types.h>
#include <linux/netdevice.h>
#include <linux/fib_rules.h>
#include <net/flow.h>
#include <net/rtnetlink.h>

struct fib_rule
{
	struct list_head	list;
	atomic_t		refcnt;
	int			ifindex;
	char			ifname[IFNAMSIZ];
	u32			mark;
	u32			mark_mask;
	u32			pref;
	u32			flags;
	u32			table;
	u8			action;
	u32			target;
	struct fib_rule *	ctarget;
	struct rcu_head		rcu;
};

struct fib_lookup_arg
{
	void			*lookup_ptr;
	void			*result;
	struct fib_rule		*rule;
};

struct fib_rules_ops
{
	int			family;
	struct list_head	list;
	int			rule_size;
	int			addr_size;
	int			unresolved_rules;
	int			nr_goto_rules;

	int			(*action)(struct fib_rule *,
					  struct flowi *, int,
					  struct fib_lookup_arg *);
	int			(*match)(struct fib_rule *,
					 struct flowi *, int);
	int			(*configure)(struct fib_rule *,
					     struct sk_buff *,
					     struct nlmsghdr *,
					     struct fib_rule_hdr *,
					     struct nlattr **);
	int			(*compare)(struct fib_rule *,
					   struct fib_rule_hdr *,
					   struct nlattr **);
	int			(*fill)(struct fib_rule *, struct sk_buff *,
					struct nlmsghdr *,
					struct fib_rule_hdr *);
	u32			(*default_pref)(void);
	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)(void);

	int			nlgroup;
	const struct nla_policy	*policy;
	struct list_head	*rules_list;
	struct module		*owner;
};

#define FRA_GENERIC_POLICY \
	[FRA_IFNAME]	= { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
	[FRA_PRIORITY]	= { .type = NLA_U32 }, \
	[FRA_FWMARK]	= { .type = NLA_U32 }, \
	[FRA_FWMASK]	= { .type = NLA_U32 }, \
	[FRA_TABLE]     = { .type = NLA_U32 }, \
	[FRA_GOTO]	= { .type = NLA_U32 }

static inline void fib_rule_get(struct fib_rule *rule)
{
	atomic_inc(&rule->refcnt);
}

static inline void fib_rule_put_rcu(struct rcu_head *head)
{
	struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
	kfree(rule);
}

static inline void fib_rule_put(struct fib_rule *rule)
{
	if (atomic_dec_and_test(&rule->refcnt))
		call_rcu(&rule->rcu, fib_rule_put_rcu);
}

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;
}

extern int			fib_rules_register(struct fib_rules_ops *);
extern int			fib_rules_unregister(struct fib_rules_ops *);

extern int			fib_rules_lookup(struct fib_rules_ops *,
						 struct flowi *, int flags,
						 struct fib_lookup_arg *);
#endif
Commit	Line	Data
14c0b97d TG	1	#ifndef __NET_FIB_RULES_H
	2	#define __NET_FIB_RULES_H
	3
	4	#include <linux/types.h>
	5	#include <linux/netdevice.h>
	6	#include <linux/fib_rules.h>
	7	#include <net/flow.h>
9d9e6a58	8	#include <net/rtnetlink.h>
14c0b97d TG	9
	10	struct fib_rule
	11	{
	12	struct list_head list;
	13	atomic_t refcnt;
	14	int ifindex;
	15	char ifname[IFNAMSIZ];
b8964ed9 TG	16	u32 mark;
b8964ed9 TG	17	u32 mark_mask;
14c0b97d TG	18	u32 pref;
	19	u32 flags;
	20	u32 table;
	21	u8 action;
0947c9fe TG	22	u32 target;
0947c9fe TG	23	struct fib_rule * ctarget;
14c0b97d TG	24	struct rcu_head rcu;
	25	};
	26
	27	struct fib_lookup_arg
	28	{
	29	void *lookup_ptr;
	30	void *result;
	31	struct fib_rule *rule;
	32	};
	33
	34	struct fib_rules_ops
	35	{
	36	int family;
	37	struct list_head list;
	38	int rule_size;
e1701c68	39	int addr_size;
0947c9fe TG	40	int unresolved_rules;
0947c9fe TG	41	int nr_goto_rules;
14c0b97d TG	42
	43	int (action)(struct fib_rule ,
	44	struct flowi *, int,
	45	struct fib_lookup_arg *);
	46	int (match)(struct fib_rule ,
	47	struct flowi *, int);
	48	int (configure)(struct fib_rule ,
	49	struct sk_buff *,
	50	struct nlmsghdr *,
	51	struct fib_rule_hdr *,
	52	struct nlattr **);
	53	int (compare)(struct fib_rule ,
	54	struct fib_rule_hdr *,
	55	struct nlattr **);
	56	int (fill)(struct fib_rule , struct sk_buff *,
	57	struct nlmsghdr *,
	58	struct fib_rule_hdr *);
	59	u32 (*default_pref)(void);
339bf98f	60	size_t (nlmsg_payload)(struct fib_rule );
14c0b97d	61
73417f61 TG	62	/* Called after modifications to the rules set, must flush
	63	* the route cache if one exists. */
	64	void (*flush_cache)(void);
	65
14c0b97d	66	int nlgroup;
ef7c79ed	67	const struct nla_policy *policy;
14c0b97d TG	68	struct list_head *rules_list;
	69	struct module *owner;
	70	};
	71
1f6c9557 TG	72	#define FRA_GENERIC_POLICY \
	73	[FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
	74	[FRA_PRIORITY] = { .type = NLA_U32 }, \
	75	[FRA_FWMARK] = { .type = NLA_U32 }, \
	76	[FRA_FWMASK] = { .type = NLA_U32 }, \
0947c9fe TG	77	[FRA_TABLE] = { .type = NLA_U32 }, \
0947c9fe TG	78	[FRA_GOTO] = { .type = NLA_U32 }
1f6c9557	79
14c0b97d TG	80	static inline void fib_rule_get(struct fib_rule *rule)
	81	{
	82	atomic_inc(&rule->refcnt);
	83	}
	84
	85	static inline void fib_rule_put_rcu(struct rcu_head *head)
	86	{
	87	struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
	88	kfree(rule);
	89	}
	90
	91	static inline void fib_rule_put(struct fib_rule *rule)
	92	{
	93	if (atomic_dec_and_test(&rule->refcnt))
	94	call_rcu(&rule->rcu, fib_rule_put_rcu);
	95	}
	96
9e762a4a PM	97	static inline u32 frh_get_table(struct fib_rule_hdr frh, struct nlattr *nla)
	98	{
	99	if (nla[FRA_TABLE])
	100	return nla_get_u32(nla[FRA_TABLE]);
	101	return frh->table;
	102	}
	103
14c0b97d TG	104	extern int fib_rules_register(struct fib_rules_ops *);
	105	extern int fib_rules_unregister(struct fib_rules_ops *);
	106
	107	extern int fib_rules_lookup(struct fib_rules_ops *,
	108	struct flowi *, int flags,
	109	struct fib_lookup_arg *);
14c0b97d	110	#endif