[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;
	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			(*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 *);

	int			nlgroup;
	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 }

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 *);

extern int			fib_rules_dump(struct sk_buff *,
					       struct netlink_callback *, int);
#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;
	22	struct rcu_head rcu;
	23	};
	24
	25	struct fib_lookup_arg
	26	{
	27	void *lookup_ptr;
	28	void *result;
	29	struct fib_rule *rule;
	30	};
	31
	32	struct fib_rules_ops
	33	{
	34	int family;
	35	struct list_head list;
	36	int rule_size;
e1701c68	37	int addr_size;
14c0b97d TG	38
	39	int (action)(struct fib_rule ,
	40	struct flowi *, int,
	41	struct fib_lookup_arg *);
	42	int (match)(struct fib_rule ,
	43	struct flowi *, int);
	44	int (configure)(struct fib_rule ,
	45	struct sk_buff *,
	46	struct nlmsghdr *,
	47	struct fib_rule_hdr *,
	48	struct nlattr **);
	49	int (compare)(struct fib_rule ,
	50	struct fib_rule_hdr *,
	51	struct nlattr **);
	52	int (fill)(struct fib_rule , struct sk_buff *,
	53	struct nlmsghdr *,
	54	struct fib_rule_hdr *);
	55	u32 (*default_pref)(void);
339bf98f	56	size_t (nlmsg_payload)(struct fib_rule );
14c0b97d TG	57
	58	int nlgroup;
	59	struct nla_policy *policy;
	60	struct list_head *rules_list;
	61	struct module *owner;
	62	};
	63
1f6c9557 TG	64	#define FRA_GENERIC_POLICY \
	65	[FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
	66	[FRA_PRIORITY] = { .type = NLA_U32 }, \
	67	[FRA_FWMARK] = { .type = NLA_U32 }, \
	68	[FRA_FWMASK] = { .type = NLA_U32 }, \
	69	[FRA_TABLE] = { .type = NLA_U32 }
	70
14c0b97d TG	71	static inline void fib_rule_get(struct fib_rule *rule)
	72	{
	73	atomic_inc(&rule->refcnt);
	74	}
	75
	76	static inline void fib_rule_put_rcu(struct rcu_head *head)
	77	{
	78	struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
	79	kfree(rule);
	80	}
	81
	82	static inline void fib_rule_put(struct fib_rule *rule)
	83	{
	84	if (atomic_dec_and_test(&rule->refcnt))
	85	call_rcu(&rule->rcu, fib_rule_put_rcu);
	86	}
	87
9e762a4a PM	88	static inline u32 frh_get_table(struct fib_rule_hdr frh, struct nlattr *nla)
	89	{
	90	if (nla[FRA_TABLE])
	91	return nla_get_u32(nla[FRA_TABLE]);
	92	return frh->table;
	93	}
	94
14c0b97d TG	95	extern int fib_rules_register(struct fib_rules_ops *);
	96	extern int fib_rules_unregister(struct fib_rules_ops *);
	97
	98	extern int fib_rules_lookup(struct fib_rules_ops *,
	99	struct flowi *, int flags,
	100	struct fib_lookup_arg *);
	101
14c0b97d TG	102	extern int fib_rules_dump(struct sk_buff *,
	103	struct netlink_callback *, int);
	104	#endif