linux/include/net/fib_rules.h
Patrick McHardy 9e762a4a89 [NET]: Introduce RTA_TABLE/FRA_TABLE attributes
Introduce RTA_TABLE route attribute and FRA_TABLE routing rule attribute
to hold 32 bit routing table IDs. Usespace compatibility is provided by
continuing to accept and send the rtm_table field, but because of its
limited size it can only carry the low 8 bits of the table ID. This
implies that if larger IDs are used, _all_ userspace programs using them
need to use RTA_TABLE.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-09-22 14:54:25 -07:00

98 lines
2.2 KiB
C

#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/netlink.h>
struct fib_rule
{
struct list_head list;
atomic_t refcnt;
int ifindex;
char ifname[IFNAMSIZ];
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 (*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);
int nlgroup;
struct nla_policy *policy;
struct list_head *rules_list;
struct module *owner;
};
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_nl_newrule(struct sk_buff *,
struct nlmsghdr *, void *);
extern int fib_nl_delrule(struct sk_buff *,
struct nlmsghdr *, void *);
extern int fib_rules_dump(struct sk_buff *,
struct netlink_callback *, int);
#endif