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https://github.com/torvalds/linux
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0ddcf43d5d
This patch is meant to collapse local and main into one by converting tb_data from an array to a pointer. Doing this allows us to point the local table into the main while maintaining the same variables in the table. As such the tb_data was converted from an array to a pointer, and a new array called data is added in order to still provide an object for tb_data to point to. In order to track the origin of the fib aliases a tb_id value was added in a hole that existed on 64b systems. Using this we can also reverse the merge in the event that custom FIB rules are enabled. With this patch I am seeing an improvement of 20ns to 30ns for routing lookups as long as custom rules are not enabled, with custom rules enabled we fall back to split tables and the original behavior. Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
#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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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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int fib_nh_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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}
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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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