net/ipv4/fib_lookup.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _FIB_LOOKUP_H
   3 #define _FIB_LOOKUP_H
   4
   5 #include <linux/types.h>
   6 #include <linux/list.h>
   7 #include <net/ip_fib.h>
   8
   9 struct fib_alias {
  10         struct hlist_node       fa_list;
  11         struct fib_info         *fa_info;
  12         u8                      fa_tos;
  13         u8                      fa_type;
  14         u8                      fa_state;
  15         u8                      fa_slen;
  16         u32                     tb_id;
  17         s16                     fa_default;
  18         struct rcu_head         rcu;
  19 };
  20
  21 #define FA_S_ACCESSED   0x01
  22
  23 /* Dont write on fa_state unless needed, to keep it shared on all cpus */
  24 static inline void fib_alias_accessed(struct fib_alias *fa)
  25 {
  26         if (!(fa->fa_state & FA_S_ACCESSED))
  27                 fa->fa_state |= FA_S_ACCESSED;
  28 }
  29
  30 /* Exported by fib_semantics.c */
  31 void fib_release_info(struct fib_info *);
  32 struct fib_info *fib_create_info(struct fib_config *cfg,
  33                                  struct netlink_ext_ack *extack);
  34 int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
  35                  struct netlink_ext_ack *extack);
  36 bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
  37 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, u32 tb_id,
  38                   u8 type, __be32 dst, int dst_len, u8 tos, struct fib_info *fi,
  39                   unsigned int);
  40 void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len,
  41                u32 tb_id, const struct nl_info *info, unsigned int nlm_flags);
  42
  43 static inline void fib_result_assign(struct fib_result *res,
  44                                      struct fib_info *fi)
  45 {
  46         /* we used to play games with refcounts, but we now use RCU */
  47         res->fi = fi;
  48 }
  49
  50 struct fib_prop {
  51         int     error;
  52         u8      scope;
  53 };
  54
  55 extern const struct fib_prop fib_props[RTN_MAX + 1];
  56
  57 #endif /* _FIB_LOOKUP_H */