net/ipv4/fib_lookup.h

   1 #ifndef _FIB_LOOKUP_H
   2 #define _FIB_LOOKUP_H
   3
   4 #include <linux/types.h>
   5 #include <linux/list.h>
   6 #include <net/ip_fib.h>
   7
   8 struct fib_alias {
   9         struct list_head        fa_list;
  10         struct fib_info         *fa_info;
  11         u8                      fa_tos;
  12         u8                      fa_type;
  13         u8                      fa_scope;
  14         u8                      fa_state;
  15         struct rcu_head         rcu;
  16 };
  17
  18 #define FA_S_ACCESSED   0x01
  19
  20 /* Dont write on fa_state unless needed, to keep it shared on all cpus */
  21 static inline void fib_alias_accessed(struct fib_alias *fa)
  22 {
  23         if (!(fa->fa_state & FA_S_ACCESSED))
  24                 fa->fa_state |= FA_S_ACCESSED;
  25 }
  26
  27 /* Exported by fib_semantics.c */
  28 extern int fib_semantic_match(struct list_head *head,
  29                               const struct flowi *flp,
  30                               struct fib_result *res, int prefixlen, int fib_flags);
  31 extern void fib_release_info(struct fib_info *);
  32 extern struct fib_info *fib_create_info(struct fib_config *cfg);
  33 extern int fib_nh_match(struct fib_config *cfg, struct fib_info *fi);
  34 extern int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
  35                          u32 tb_id, u8 type, u8 scope, __be32 dst,
  36                          int dst_len, u8 tos, struct fib_info *fi,
  37                          unsigned int);
  38 extern void rtmsg_fib(int event, __be32 key, struct fib_alias *fa,
  39                       int dst_len, u32 tb_id, struct nl_info *info,
  40                       unsigned int nlm_flags);
  41 extern struct fib_alias *fib_find_alias(struct list_head *fah,
  42                                         u8 tos, u32 prio);
  43 extern int fib_detect_death(struct fib_info *fi, int order,
  44                             struct fib_info **last_resort,
  45                             int *last_idx, int dflt);
  46
  47 static inline void fib_result_assign(struct fib_result *res,
  48                                      struct fib_info *fi)
  49 {
  50         /* we used to play games with refcounts, but we now use RCU */
  51         res->fi = fi;
  52 }
  53
  54 #endif /* _FIB_LOOKUP_H */