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> 8 #include <net/netlink.h> 9 10 struct fib_rule 11 { 12 struct list_head list; 13 atomic_t refcnt; 14 int ifindex; 15 char ifname[IFNAMSIZ]; 16 u32 mark; 17 u32 mark_mask; 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; 37 38 int (*action)(struct fib_rule *, 39 struct flowi *, int, 40 struct fib_lookup_arg *); 41 int (*match)(struct fib_rule *, 42 struct flowi *, int); 43 int (*configure)(struct fib_rule *, 44 struct sk_buff *, 45 struct nlmsghdr *, 46 struct fib_rule_hdr *, 47 struct nlattr **); 48 int (*compare)(struct fib_rule *, 49 struct fib_rule_hdr *, 50 struct nlattr **); 51 int (*fill)(struct fib_rule *, struct sk_buff *, 52 struct nlmsghdr *, 53 struct fib_rule_hdr *); 54 u32 (*default_pref)(void); 55 size_t (*nlmsg_payload)(struct fib_rule *); 56 57 int nlgroup; 58 struct nla_policy *policy; 59 struct list_head *rules_list; 60 struct module *owner; 61 }; 62 63 #define FRA_GENERIC_POLICY \ 64 [FRA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ - 1 }, \ 65 [FRA_PRIORITY] = { .type = NLA_U32 }, \ 66 [FRA_FWMARK] = { .type = NLA_U32 }, \ 67 [FRA_FWMASK] = { .type = NLA_U32 }, \ 68 [FRA_TABLE] = { .type = NLA_U32 } 69 70 static inline void fib_rule_get(struct fib_rule *rule) 71 { 72 atomic_inc(&rule->refcnt); 73 } 74 75 static inline void fib_rule_put_rcu(struct rcu_head *head) 76 { 77 struct fib_rule *rule = container_of(head, struct fib_rule, rcu); 78 kfree(rule); 79 } 80 81 static inline void fib_rule_put(struct fib_rule *rule) 82 { 83 if (atomic_dec_and_test(&rule->refcnt)) 84 call_rcu(&rule->rcu, fib_rule_put_rcu); 85 } 86 87 static inline u32 frh_get_table(struct fib_rule_hdr *frh, struct nlattr **nla) 88 { 89 if (nla[FRA_TABLE]) 90 return nla_get_u32(nla[FRA_TABLE]); 91 return frh->table; 92 } 93 94 extern int fib_rules_register(struct fib_rules_ops *); 95 extern int fib_rules_unregister(struct fib_rules_ops *); 96 97 extern int fib_rules_lookup(struct fib_rules_ops *, 98 struct flowi *, int flags, 99 struct fib_lookup_arg *); 100 101 extern int fib_nl_newrule(struct sk_buff *, 102 struct nlmsghdr *, void *); 103 extern int fib_nl_delrule(struct sk_buff *, 104 struct nlmsghdr *, void *); 105 extern int fib_rules_dump(struct sk_buff *, 106 struct netlink_callback *, int); 107 #endif 108