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/*
* NET Generic infrastructure for INET6 connection oriented protocols .
*
* Authors : Many people , see the TCPv6 sources
*
* From code originally in TCPv6
*
* This program is free software ; you can redistribute it and / or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation ; either version
* 2 of the License , or ( at your option ) any later version .
*/
# ifndef _INET6_CONNECTION_SOCK_H
# define _INET6_CONNECTION_SOCK_H
# include <linux/types.h>
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struct in6_addr ;
struct inet_bind_bucket ;
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struct request_sock ;
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struct sk_buff ;
struct sock ;
struct sockaddr ;
extern int inet6_csk_bind_conflict ( const struct sock * sk ,
tcp: bind() use stronger condition for bind_conflict
We must try harder to get unique (addr, port) pairs when
doing port autoselection for sockets with SO_REUSEADDR
option set.
We achieve this by adding a relaxation parameter to
inet_csk_bind_conflict. When 'relax' parameter is off
we return a conflict whenever the current searched
pair (addr, port) is not unique.
This tries to address the problems reported in patch:
8d238b25b1ec22a73b1c2206f111df2faaff8285
Revert "tcp: bind() fix when many ports are bound"
Tests where ran for creating and binding(0) many sockets
on 100 IPs. The results are, on average:
* 60000 sockets, 600 ports / IP:
* 0.210 s, 620 (IP, port) duplicates without patch
* 0.219 s, no duplicates with patch
* 100000 sockets, 1000 ports / IP:
* 0.371 s, 1720 duplicates without patch
* 0.373 s, no duplicates with patch
* 200000 sockets, 2000 ports / IP:
* 0.766 s, 6900 duplicates without patch
* 0.768 s, no duplicates with patch
* 500000 sockets, 5000 ports / IP:
* 2.227 s, 41500 duplicates without patch
* 2.284 s, no duplicates with patch
Signed-off-by: Alex Copot <alex.mihai.c@gmail.com>
Signed-off-by: Daniel Baluta <dbaluta@ixiacom.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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const struct inet_bind_bucket * tb , bool relax ) ;
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extern struct dst_entry * inet6_csk_route_req ( struct sock * sk ,
const struct request_sock * req ) ;
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extern struct request_sock * inet6_csk_search_req ( const struct sock * sk ,
struct request_sock * * * prevp ,
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const __be16 rport ,
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const struct in6_addr * raddr ,
const struct in6_addr * laddr ,
const int iif ) ;
extern void inet6_csk_reqsk_queue_hash_add ( struct sock * sk ,
struct request_sock * req ,
const unsigned long timeout ) ;
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extern void inet6_csk_addr2sockaddr ( struct sock * sk , struct sockaddr * uaddr ) ;
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extern int inet6_csk_xmit ( struct sk_buff * skb , struct flowi * fl ) ;
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# endif /* _INET6_CONNECTION_SOCK_H */