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udp: bind() optimisation

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UDP bind() can be O(N^2) in some pathological cases.

Thanks to secondary hash tables, we can make it O(N)

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2009-11-09 05:26:33 +00:00
committed by David S. Miller
parent 0ab365f463
commit 30fff9231f
4 changed files with 80 additions and 16 deletions
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3
include/net/udp.h
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@@ -158,7 +158,8 @@ static inline void udp_lib_close(struct sock *sk, long timeout)
}
extern int udp_lib_get_port(struct sock *sk, unsigned short snum,
int (*)(const struct sock*,const struct sock*));
int (*)(const struct sock *,const struct sock *),
unsigned int hash2_nulladdr);
/* net/ipv4/udp.c */
extern int udp_get_port(struct sock *sk, unsigned short snum,