[NET]: Protocol Independant Policy Routing Rules Framework
Derived from net/ipv/fib_rules.c
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/fib_rules.h b/include/net/fib_rules.h
new file mode 100644
index 0000000..61375d9
--- /dev/null
+++ b/include/net/fib_rules.h
@@ -0,0 +1,90 @@
+#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);
+}
+
+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
