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 #include <net/nexthop.h>
   9
  10 struct fib_alias {
  11         struct hlist_node       fa_list;
  12         struct fib_info         *fa_info;
  13         u8                      fa_tos;
  14         u8                      fa_type;
  15         u8                      fa_state;
  16         u8                      fa_slen;
  17         u32                     tb_id;
  18         s16                     fa_default;
  19         u8                      offload:1,
  20                                 trap:1,
  21                                 unused:6;
  22         struct rcu_head         rcu;
  23 };
  24
  25 #define FA_S_ACCESSED   0x01
  26
  27 /* Dont write on fa_state unless needed, to keep it shared on all cpus */
  28 static inline void fib_alias_accessed(struct fib_alias *fa)
  29 {
  30         if (!(fa->fa_state & FA_S_ACCESSED))
  31                 fa->fa_state |= FA_S_ACCESSED;
  32 }
  33
  34 /* Exported by fib_semantics.c */
  35 void fib_release_info(struct fib_info *);
  36 struct fib_info *fib_create_info(struct fib_config *cfg,
  37                                  struct netlink_ext_ack *extack);
  38 int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
  39                  struct netlink_ext_ack *extack);
  40 bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
  41 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
  42                   struct fib_rt_info *fri, unsigned int flags);
  43 void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len,
  44                u32 tb_id, const struct nl_info *info, unsigned int nlm_flags);
  45
  46 static inline void fib_result_assign(struct fib_result *res,
  47                                      struct fib_info *fi)
  48 {
  49         /* we used to play games with refcounts, but we now use RCU */
  50         res->fi = fi;
  51         res->nhc = fib_info_nhc(fi, 0);
  52 }
  53
  54 struct fib_prop {
  55         int     error;
  56         u8      scope;
  57 };
  58
  59 extern const struct fib_prop fib_props[RTN_MAX + 1];
  60
  61 #endif /* _FIB_LOOKUP_H */