NetBSD/sys/conf/param.c

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/* $NetBSD: param.c,v 1.38 2001/08/20 04:51:17 mrg Exp $ */
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/*
* Copyright (c) 1980, 1986, 1989 Regents of the University of California.
* All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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.
*
* @(#)param.c 7.20 (Berkeley) 6/27/91
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*/
#include "opt_rtc_offset.h"
#include "opt_sb_max.h"
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#include "opt_sysv.h"
#include "opt_sysvparam.h"
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#include <sys/param.h>
#include <sys/systm.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
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#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/file.h>
#include <sys/callout.h>
#include <sys/mbuf.h>
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#include <ufs/ufs/quota.h>
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#include <sys/kernel.h>
#include <sys/utsname.h>
#ifdef SYSVSHM
#include <machine/vmparam.h>
#include <sys/shm.h>
#endif
#ifdef SYSVSEM
#include <sys/sem.h>
#endif
#ifdef SYSVMSG
#include <sys/msg.h>
#endif
/*
* System parameter formulae.
*
* This file is copied into each directory where we compile
* the kernel; it should be modified there to suit local taste
* if necessary.
*
* Compiled with -DHZ=xx -DRTC_OFFSET=x -DMAXUSERS=xx
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*/
#ifdef TIMEZONE
#error TIMEZONE is an obsolete kernel option.
#endif
#ifdef DST
#error DST is an obsolete kernel option.
#endif
#ifndef RTC_OFFSET
#define RTC_OFFSET 0
#endif
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#ifndef HZ
#define HZ 100
#endif
#ifndef MAXFILES
#define MAXFILES (3 * (NPROC + MAXUSERS) + 80)
#endif
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int hz = HZ;
int tick = 1000000 / HZ;
int tickadj = 240000 / (60 * HZ); /* can adjust 240ms in 60s */
int rtc_offset = RTC_OFFSET;
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int maxproc = NPROC;
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int desiredvnodes = NVNODE;
int maxfiles = MAXFILES;
int ncallout = 16 + NPROC; /* size of callwheel (rounded to ^2) */
u_long sb_max = SB_MAX; /* maximum socket buffer size */
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int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
/*
* Various mbuf-related parameters. These can also be changed at run-time
* with sysctl.
*/
int nmbclusters = NMBCLUSTERS;
#ifndef MBLOWAT
#define MBLOWAT 16
#endif
int mblowat = MBLOWAT;
#ifndef MCLLOWAT
#define MCLLOWAT 8
#endif
int mcllowat = MCLLOWAT;
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/*
* Values in support of System V compatible shared memory. XXX
*/
#ifdef SYSVSHM
#ifndef SHMMAX
#define SHMMAX SHMMAXPGS /* shminit() performs a `*= NBPG' */
#endif
#ifndef SHMMIN
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#define SHMMIN 1
#endif
#ifndef SHMMNI
#define SHMMNI 128 /* <= SHMMMNI in shm.h */
#endif
#ifndef SHMSEG
#define SHMSEG 128
#endif
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#define SHMALL SHMMAXPGS
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struct shminfo shminfo = {
SHMMAX,
SHMMIN,
SHMMNI,
SHMSEG,
SHMALL
};
#endif
/*
* Values in support of System V compatible semaphores.
*/
#ifdef SYSVSEM
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struct seminfo seminfo = {
SEMMAP, /* # of entries in semaphore map */
SEMMNI, /* # of semaphore identifiers */
SEMMNS, /* # of semaphores in system */
SEMMNU, /* # of undo structures in system */
SEMMSL, /* max # of semaphores per id */
SEMOPM, /* max # of operations per semop call */
SEMUME, /* max # of undo entries per process */
SEMUSZ, /* size in bytes of undo structure */
SEMVMX, /* semaphore maximum value */
SEMAEM /* adjust on exit max value */
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};
#endif
/*
* Values in support of System V compatible messages.
*/
#ifdef SYSVMSG
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struct msginfo msginfo = {
MSGMAX, /* max chars in a message */
MSGMNI, /* # of message queue identifiers */
MSGMNB, /* max chars in a queue */
MSGTQL, /* max messages in system */
MSGSSZ, /* size of a message segment */
/* (must be small power of 2 greater than 4) */
MSGSEG /* number of message segments */
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};
#endif
/*
* These have to be allocated somewhere; allocating
* them here forces loader errors if this file is omitted
* (if they've been externed everywhere else; hah!).
*/
struct buf *buf;
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char *buffers;
/*
* These control when and to what priority a process gets after a certain
* amount of CPU time expires. AUTONICETIME is in seconds.
* AUTONICEVAL is NOT offset by NZERO, i.e. it's between PRIO_MIN and PRIO_MAX.
*/
#ifndef AUTONICETIME
#define AUTONICETIME (60 * 10) /* 10 minutes */
#endif
#ifndef AUTONICEVAL
#define AUTONICEVAL 4 /* default + 4 */
#endif
int autonicetime = AUTONICETIME;
int autoniceval = AUTONICEVAL;
/*
* Actual network mbuf sizes (read-only), for netstat.
*/
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const int msize = MSIZE;
const int mclbytes = MCLBYTES;