aacd9289af
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:
8d238b25b1
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>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
/*
|
|
* 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>
|
|
|
|
struct in6_addr;
|
|
struct inet_bind_bucket;
|
|
struct request_sock;
|
|
struct sk_buff;
|
|
struct sock;
|
|
struct sockaddr;
|
|
|
|
extern int inet6_csk_bind_conflict(const struct sock *sk,
|
|
const struct inet_bind_bucket *tb, bool relax);
|
|
|
|
extern struct dst_entry* inet6_csk_route_req(struct sock *sk,
|
|
const struct request_sock *req);
|
|
|
|
extern struct request_sock *inet6_csk_search_req(const struct sock *sk,
|
|
struct request_sock ***prevp,
|
|
const __be16 rport,
|
|
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);
|
|
|
|
extern void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);
|
|
|
|
extern int inet6_csk_xmit(struct sk_buff *skb, struct flowi *fl);
|
|
#endif /* _INET6_CONNECTION_SOCK_H */
|