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Diffstat (limited to 'sys/kern/subr_param.c')
| -rw-r--r-- | sys/kern/subr_param.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/sys/kern/subr_param.c b/sys/kern/subr_param.c new file mode 100644 index 0000000..0a03cd6 --- /dev/null +++ b/sys/kern/subr_param.c @@ -0,0 +1,208 @@ +/* + * Copyright (c) 1980, 1986, 1989, 1993 + * The 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 8.2 (Berkeley) 1/21/94 + * $Id: param.c,v 1.11 1995/06/29 08:21:32 davidg Exp $ + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/socket.h> +#include <sys/proc.h> +#include <sys/vnode.h> +#include <sys/file.h> +#include <sys/callout.h> +#include <sys/clist.h> +#include <sys/mbuf.h> +#include <sys/kernel.h> + +#include <ufs/ufs/quota.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 -DMAXUSERS=xx + */ + +#ifndef HZ +#define HZ 100 +#endif +int hz = HZ; +int tick = 1000000 / HZ; +int tickadj = 30000 / (60 * HZ); /* can adjust 30ms in 60s */ +#define NPROC (20 + 16 * MAXUSERS) +int maxproc = NPROC; /* maximum # of processes */ +int maxprocperuid = NPROC-1; /* maximum # of processes per user */ +int maxfiles = NPROC*2; /* system wide open files limit */ +int maxfilesperproc = NPROC*2; /* per-process open files limit */ +int ncallout = 16 + NPROC; /* maximum # of timer events */ + +/* maximum # of mbuf clusters */ +#ifndef NMBCLUSTERS +int nmbclusters = 512 + MAXUSERS * 16; +#else +int nmbclusters = NMBCLUSTERS; +#endif + +int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */ + +/* + * Values in support of System V compatible shared memory. XXX + */ +#ifdef SYSVSHM +#ifndef SHMMAX +#define SHMMAX (SHMMAXPGS*NBPG) +#endif +#ifndef SHMMIN +#define SHMMIN 1 +#endif +#ifndef SHMMNI +#define SHMMNI 32 /* <= SHMMMNI in shm.h */ +#endif +#ifndef SHMSEG +#define SHMSEG 8 +#endif +#ifndef SHMALL +#define SHMALL (SHMMAXPGS/CLSIZE) +#endif + +struct shminfo shminfo = { + SHMMAX, + SHMMIN, + SHMMNI, + SHMSEG, + SHMALL +}; +#endif + +/* + * Values in support of System V compatible semaphores. + */ + +#ifdef SYSVSEM + +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 */ +}; +#endif + +/* + * Values in support of System V compatible messages. + */ + +#ifdef SYSVMSG + +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 */ +}; +#endif + +/* + * These may be set to nonzero here or by patching. + * If they are nonzero at bootstrap time then they are + * initialized to values dependent on the memory size. + */ +#ifdef NBUF +int nbuf = NBUF; +#else +int nbuf = 0; +#endif +int nswbuf = 0; + +/* + * 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 cblock *cfree; +struct buf *swbuf; +char *buffers; + +/* + * Proc/pgrp hashing. + * Here so that hash table sizes can depend on MAXUSERS/NPROC. + * Hash size must be a power of two. + * NOW omission of this file will cause loader errors! + */ + +#if NPROC > 1024 +#define PIDHSZ 512 +#else +#if NPROC > 512 +#define PIDHSZ 256 +#else +#if NPROC > 256 +#define PIDHSZ 128 +#else +#define PIDHSZ 64 +#endif +#endif +#endif + +struct proc *pidhash[PIDHSZ]; +struct pgrp *pgrphash[PIDHSZ]; +int pidhashmask = PIDHSZ - 1; |
