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eba618abac
Most of the ipv4 code only needs data from fib_nh_common. Add
fib_nh_common selection to fib_result and update users to use it.
Right now, fib_nh_common in fib_result will point to a fib_nh struct
that is embedded within a fib_info:
fib_info --> fib_nh
fib_nh
...
fib_nh
^
fib_result->nhc ----+
Later, nhc can point to a fib_nh within a nexthop struct:
fib_info --> nexthop --> fib_nh
^
fib_result->nhc ---------------+
or for a nexthop group:
fib_info --> nexthop --> nexthop --> fib_nh
nexthop --> fib_nh
...
nexthop --> fib_nh
^
fib_result->nhc ---------------------------+
In all cases nhsel within fib_result will point to which leg in the
multipath route is used.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _FIB_LOOKUP_H
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#define _FIB_LOOKUP_H
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#include <linux/types.h>
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#include <linux/list.h>
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#include <net/ip_fib.h>
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struct fib_alias {
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struct hlist_node fa_list;
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struct fib_info *fa_info;
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u8 fa_tos;
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u8 fa_type;
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u8 fa_state;
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u8 fa_slen;
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u32 tb_id;
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s16 fa_default;
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struct rcu_head rcu;
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};
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#define FA_S_ACCESSED 0x01
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/* Dont write on fa_state unless needed, to keep it shared on all cpus */
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static inline void fib_alias_accessed(struct fib_alias *fa)
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{
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if (!(fa->fa_state & FA_S_ACCESSED))
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fa->fa_state |= FA_S_ACCESSED;
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}
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/* Exported by fib_semantics.c */
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void fib_release_info(struct fib_info *);
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struct fib_info *fib_create_info(struct fib_config *cfg,
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struct netlink_ext_ack *extack);
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int fib_nh_match(struct fib_config *cfg, struct fib_info *fi,
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struct netlink_ext_ack *extack);
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bool fib_metrics_match(struct fib_config *cfg, struct fib_info *fi);
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int fib_dump_info(struct sk_buff *skb, u32 pid, u32 seq, int event, u32 tb_id,
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u8 type, __be32 dst, int dst_len, u8 tos, struct fib_info *fi,
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unsigned int);
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void rtmsg_fib(int event, __be32 key, struct fib_alias *fa, int dst_len,
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u32 tb_id, const struct nl_info *info, unsigned int nlm_flags);
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static inline void fib_result_assign(struct fib_result *res,
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struct fib_info *fi)
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{
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/* we used to play games with refcounts, but we now use RCU */
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res->fi = fi;
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res->nhc = fib_info_nhc(fi, 0);
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}
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struct fib_prop {
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int error;
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u8 scope;
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};
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extern const struct fib_prop fib_props[RTN_MAX + 1];
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#endif /* _FIB_LOOKUP_H */
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