9e762a4a89
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>
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
#ifndef __NET_FIB_RULES_H
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#define __NET_FIB_RULES_H
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#include <linux/types.h>
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#include <linux/netdevice.h>
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#include <linux/fib_rules.h>
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#include <net/flow.h>
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#include <net/netlink.h>
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struct fib_rule
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{
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struct list_head list;
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atomic_t refcnt;
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int ifindex;
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char ifname[IFNAMSIZ];
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u32 pref;
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u32 flags;
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u32 table;
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u8 action;
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struct rcu_head rcu;
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};
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struct fib_lookup_arg
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{
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void *lookup_ptr;
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void *result;
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struct fib_rule *rule;
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};
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struct fib_rules_ops
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{
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int family;
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struct list_head list;
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int rule_size;
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int (*action)(struct fib_rule *,
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struct flowi *, int,
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struct fib_lookup_arg *);
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int (*match)(struct fib_rule *,
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struct flowi *, int);
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int (*configure)(struct fib_rule *,
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struct sk_buff *,
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struct nlmsghdr *,
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struct fib_rule_hdr *,
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struct nlattr **);
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int (*compare)(struct fib_rule *,
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struct fib_rule_hdr *,
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struct nlattr **);
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int (*fill)(struct fib_rule *, struct sk_buff *,
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struct nlmsghdr *,
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struct fib_rule_hdr *);
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u32 (*default_pref)(void);
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int nlgroup;
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struct nla_policy *policy;
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struct list_head *rules_list;
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struct module *owner;
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};
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static inline void fib_rule_get(struct fib_rule *rule)
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{
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atomic_inc(&rule->refcnt);
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}
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static inline void fib_rule_put_rcu(struct rcu_head *head)
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{
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struct fib_rule *rule = container_of(head, struct fib_rule, rcu);
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kfree(rule);
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}
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static inline void fib_rule_put(struct fib_rule *rule)
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{
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if (atomic_dec_and_test(&rule->refcnt))
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call_rcu(&rule->rcu, fib_rule_put_rcu);
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}
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static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla)
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{
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if (nla[FRA_TABLE])
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return nla_get_u32(nla[FRA_TABLE]);
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return frh->table;
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}
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extern int fib_rules_register(struct fib_rules_ops *);
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extern int fib_rules_unregister(struct fib_rules_ops *);
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extern int fib_rules_lookup(struct fib_rules_ops *,
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struct flowi *, int flags,
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struct fib_lookup_arg *);
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extern int fib_nl_newrule(struct sk_buff *,
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struct nlmsghdr *, void *);
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extern int fib_nl_delrule(struct sk_buff *,
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struct nlmsghdr *, void *);
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extern int fib_rules_dump(struct sk_buff *,
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struct netlink_callback *, int);
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#endif
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