LXR linux/net/ipv4/fib

   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
  10struct 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;
  20        u8                      trap;
  21        u8                      offload_failed;
  22        struct rcu_head         rcu;
  23};
  24
  25#define FA_S_ACCESSED   0x01
  26
  27/* Don't write on fa_state unless needed, to keep it shared on all cpus */
  28static 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 */
  35void fib_release_info(struct fib_info *);
  36struct fib_info *fib_create_info(struct fib_config *cfg,
  37                                 struct netlink_ext_ack *extack);
  38int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi,
  39                 struct netlink_ext_ack *extack);
  40bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
  41int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event,
  42                  const struct fib_rt_info *fri, unsigned int flags);
  43void 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);
  45size_t fib_nlmsg_size(struct fib_info *fi);
  46
  47static 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        res->nhc = fib_info_nhc(fi, 0);
  53}
  54
  55struct fib_prop {
  56        int     error;
  57        u8      scope;
  58};
  59
  60extern const struct fib_prop fib_props[RTN_MAX + 1];
  61
  62#endif /* _FIB_LOOKUP_H */
  63