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1b038a5e60
commit 68144d350f4f6c348659c825cde6a82b34c27a91
Author: Patrick McHardy <kaber@trash.net>
Date: Thu Dec 3 12:05:25 2009 +0100
net: fib_rules: add oif classification
Support routing table lookup based on the flow's oif. This is useful to
classify packets originating from sockets bound to interfaces differently.
The route cache already includes the oif and needs no changes.
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
115 lines
2.9 KiB
C
115 lines
2.9 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/rtnetlink.h>
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struct fib_rule {
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struct list_head list;
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atomic_t refcnt;
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int iifindex;
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int oifindex;
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u32 mark;
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u32 mark_mask;
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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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u32 target;
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struct fib_rule * ctarget;
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char iifname[IFNAMSIZ];
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char oifname[IFNAMSIZ];
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struct rcu_head rcu;
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struct net * fr_net;
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};
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struct fib_lookup_arg {
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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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int family;
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struct list_head list;
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int rule_size;
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int addr_size;
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int unresolved_rules;
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int nr_goto_rules;
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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 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 fib_rule_hdr *);
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u32 (*default_pref)(struct fib_rules_ops *ops);
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size_t (*nlmsg_payload)(struct fib_rule *);
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/* Called after modifications to the rules set, must flush
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* the route cache if one exists. */
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void (*flush_cache)(struct fib_rules_ops *ops);
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int nlgroup;
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const struct nla_policy *policy;
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struct list_head rules_list;
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struct module *owner;
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struct net *fro_net;
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};
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#define FRA_GENERIC_POLICY \
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[FRA_IIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
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[FRA_OIFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \
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[FRA_PRIORITY] = { .type = NLA_U32 }, \
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[FRA_FWMARK] = { .type = NLA_U32 }, \
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[FRA_FWMASK] = { .type = NLA_U32 }, \
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[FRA_TABLE] = { .type = NLA_U32 }, \
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[FRA_GOTO] = { .type = NLA_U32 }
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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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release_net(rule->fr_net);
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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 void fib_rules_unregister(struct fib_rules_ops *);
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extern void fib_rules_cleanup_ops(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_default_rule_add(struct fib_rules_ops *,
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u32 pref, u32 table,
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u32 flags);
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#endif
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