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Mark Johnston
7a17566770
We have a problem in UMA where creating new zones requires a traversal
of all existing zones (in order to find a unique name for the vm.uma
sysctl subtree). This means that per-VNET UMA zones can be expensive to
create if one creates many VNET jails in a row. This itself is a
problem, but I don't see a quick solution.
Ideally we would avoid creating per-VNET zones in the first place
(except when the desire to impose per-VNET limits necessitates this),
and it turns out that the TCP fastopen and SACK code create several of
these for no apparent reason.
So: make fastopen and SACK zones global. Move some fastopen structure
definitions into tcp_fastopen.c, as they don't need to be public.
Reported by: bapt ("creating many VNET jails in a row is slow")
Reviewed by: tuexen, glebius
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D59708
114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/*-
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* Copyright (c) 2015-2017 Patrick Kelsey
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _TCP_FASTOPEN_H_
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#define _TCP_FASTOPEN_H_
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#ifdef _KERNEL
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#include "opt_inet.h"
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#define TCP_FASTOPEN_COOKIE_LEN 8 /* SipHash24 64-bit output */
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#ifdef TCP_RFC7413
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VNET_DECLARE(unsigned int, tcp_fastopen_client_enable);
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#define V_tcp_fastopen_client_enable VNET(tcp_fastopen_client_enable)
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VNET_DECLARE(unsigned int, tcp_fastopen_server_enable);
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#define V_tcp_fastopen_server_enable VNET(tcp_fastopen_server_enable)
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#else
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#define V_tcp_fastopen_client_enable 0
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#define V_tcp_fastopen_server_enable 0
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#endif /* TCP_RFC7413 */
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struct tcpcb;
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#ifdef TCP_RFC7413
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void tcp_fastopen_init(void);
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void tcp_fastopen_vnet_init(void);
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void tcp_fastopen_vnet_destroy(void);
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unsigned int *tcp_fastopen_alloc_counter(void);
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void tcp_fastopen_decrement_counter(unsigned int *);
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int tcp_fastopen_check_cookie(struct in_conninfo *, uint8_t *, unsigned int,
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uint64_t *);
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void tcp_fastopen_connect(struct tcpcb *);
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void tcp_fastopen_disable_path(struct tcpcb *);
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void tcp_fastopen_update_cache(struct tcpcb *, uint16_t, uint8_t,
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uint8_t *);
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#else
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static __inline void
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tcp_fastopen_init(void)
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{
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}
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static __inline void
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tcp_fastopen_vnet_init(void)
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{
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}
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static __inline void
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tcp_fastopen_vnet_destroy(void)
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{
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}
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static __inline unsigned int *
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tcp_fastopen_alloc_counter(void)
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{
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return (NULL);
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}
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static __inline void
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tcp_fastopen_decrement_counter(unsigned int *_counter)
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{
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}
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static __inline int
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tcp_fastopen_check_cookie(struct in_conninfo *_inc, uint8_t *_cookie,
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unsigned int _len, uint64_t *_latest_cookie)
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{
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return (-1);
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}
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static __inline void
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tcp_fastopen_connect(struct tcpcb *_tp)
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{
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}
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static __inline void
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tcp_fastopen_disable_path(struct tcpcb *_tp)
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{
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}
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static __inline void
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tcp_fastopen_update_cache(struct tcpcb *_tp, uint16_t _mss, uint8_t _cookie_len,
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uint8_t *_cookie)
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{
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}
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#endif /* TCP_RFC7413 */
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#endif /* _KERNEL */
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#endif /* _TCP_FASTOPEN_H_ */
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