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/inet_dscp.h> 8 #include <net/ip_fib.h> 9 #include <net/nexthop.h> 10 11 struct fib_alias { 12 struct hlist_node fa_list; 13 struct fib_info *fa_info; 14 dscp_t fa_dscp; 15 u8 fa_type; 16 u8 fa_state; 17 u8 fa_slen; 18 u32 tb_id; 19 s16 fa_default; 20 u8 offload; 21 u8 trap; 22 u8 offload_failed; 23 struct rcu_head rcu; 24 }; 25 26 #define FA_S_ACCESSED 0x01 27 28 /* Don't write on fa_state unless needed, to keep it shared on all cpus */ 29 static inline void fib_alias_accessed(struct fib_alias *fa) 30 { 31 u8 fa_state = READ_ONCE(fa->fa_state); 32 33 if (!(fa_state & FA_S_ACCESSED)) 34 WRITE_ONCE(fa->fa_state, fa_state | FA_S_ACCESSED); 35 } 36 37 /* Exported by fib_semantics.c */ 38 void fib_release_info(struct fib_info *); 39 struct fib_info *fib_create_info(struct fib_config *cfg, 40 struct netlink_ext_ack *extack); 41 int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi, 42 struct netlink_ext_ack *extack); 43 bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi); 44 int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, 45 const struct fib_rt_info *fri, unsigned int flags); 46 void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len, 47 u32 tb_id, const struct nl_info *info, unsigned int nlm_flags); 48 size_t fib_nlmsg_size(struct fib_info *fi); 49 50 static inline void fib_result_assign(struct fib_result *res, 51 struct fib_info *fi) 52 { 53 /* we used to play games with refcounts, but we now use RCU */ 54 res->fi = fi; 55 res->nhc = fib_info_nhc(fi, 0); 56 } 57 58 struct fib_prop { 59 int error; 60 u8 scope; 61 }; 62 63 extern const struct fib_prop fib_props[RTN_MAX + 1]; 64 65 #endif /* _FIB_LOOKUP_H */ 66