mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
5943f1a781
with low nmbclusters, we tie up too many mbclusters in the NFS duplicate request cache. This change limits the size of the dupreq cache to 1/2 the nmbclusters (and flaots in a range of [64, 2048]). MFC after 2 weeks. Reported by: Steve Kargl, David O'Brien Tested by: Steve Kargl
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Rick Macklem at The University of Guelph.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)nfsrvcache.h 8.3 (Berkeley) 3/30/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _NFSSERVER_NFSRVCACHE_H_
|
|
#define _NFSSERVER_NFSRVCACHE_H_
|
|
|
|
#include <sys/queue.h>
|
|
|
|
/*
|
|
* Definitions for the server recent request cache
|
|
*/
|
|
#define NFSRVCACHE_MAX_SIZE 2048
|
|
#define NFSRVCACHE_MIN_SIZE 64
|
|
|
|
struct nfsrvcache {
|
|
TAILQ_ENTRY(nfsrvcache) rc_lru; /* LRU chain */
|
|
LIST_ENTRY(nfsrvcache) rc_hash; /* Hash chain */
|
|
u_int32_t rc_xid; /* rpc id number */
|
|
union {
|
|
struct mbuf *ru_repmb; /* Reply mbuf list OR */
|
|
int ru_repstat; /* Reply status */
|
|
} rc_un;
|
|
union nethostaddr rc_haddr; /* Host address */
|
|
u_int32_t rc_proc; /* rpc proc number */
|
|
u_char rc_state; /* Current state of request */
|
|
u_char rc_flag; /* Flag bits */
|
|
};
|
|
|
|
#define rc_reply rc_un.ru_repmb
|
|
#define rc_status rc_un.ru_repstat
|
|
#define rc_inetaddr rc_haddr.had_inetaddr
|
|
#define rc_nam rc_haddr.had_nam
|
|
|
|
/* Cache entry states */
|
|
#define RC_UNUSED 0
|
|
#define RC_INPROG 1
|
|
#define RC_DONE 2
|
|
|
|
/* Return values */
|
|
#define RC_DROPIT 0
|
|
#define RC_REPLY 1
|
|
#define RC_DOIT 2
|
|
|
|
/* Flag bits */
|
|
#define RC_LOCKED 0x01
|
|
#define RC_WANTED 0x02
|
|
#define RC_REPSTATUS 0x04
|
|
#define RC_REPMBUF 0x08
|
|
/* free 0x10 */
|
|
#define RC_INETADDR 0x20
|
|
#define RC_NAM 0x40
|
|
|
|
#endif
|