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