/* $OpenBSD: param.h,v 1.146 2026/03/11 02:27:20 deraadt Exp $ */ /*- * Copyright (c) 1982, 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. 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. */ #ifndef _SYS_PARAM_H_ #define _SYS_PARAM_H_ #define BSD 199306 /* System version (year & month). */ #define BSD4_3 1 #define BSD4_4 1 #define OpenBSD 202605 /* OpenBSD version (year & month). */ #define OpenBSD7_9 1 /* OpenBSD 7.9 */ #include <sys/_null.h> #ifndef _LOCORE #include <sys/types.h> #endif /* * Machine-independent constants (some used in following include files). * Redefined constants are from POSIX 1003.1 limits file. * * MAXCOMLEN should be >= sizeof(ac_comm) (see <acct.h>) * MAXLOGNAME should be >= UT_NAMESIZE (see <utmp.h>) */ #include <sys/syslimits.h> #define MAXCOMLEN _MAXCOMLEN-1 /* max command name remembered, without NUL */ #define MAXINTERP 128 /* max interpreter file name length */ #define MAXLOGNAME LOGIN_NAME_MAX /* max login name length w/ NUL */ #define MAXUPRC CHILD_MAX /* max simultaneous processes */ #define NCARGS ARG_MAX /* max bytes for an exec function */ #define NGROUPS NGROUPS_MAX /* max number groups */ #define NOFILE OPEN_MAX /* max open files per process (soft) */ #define NOFILE_MAX 1024 /* max open files per process (hard) */ #define NOGROUP 65535 /* marker for empty group set member */ #define MAXHOSTNAMELEN 256 /* max hostname length w/ NUL */ /* More types and definitions used throughout the kernel. */ #ifdef _KERNEL #include <sys/errno.h> #include <sys/time.h> #include <sys/resource.h> #include <sys/ucred.h> #include <sys/uio.h> #include <sys/srp.h> #endif /* Signals. */ #include <sys/signal.h> /* Machine type dependent parameters. */ #include <sys/limits.h> #include <machine/param.h> #ifdef _KERNEL /* * Priorities. Note that with 32 run queues, differences less than 4 are * insignificant. */ #define PSWP 0 #define PVM 4 #define PINOD 8 #define PRIBIO 16 #define PVFS 20 #endif /* _KERNEL */ #define PZERO 22 /* No longer magic, shouldn't be here. XXX */ #ifdef _KERNEL #define PSOCK 24 #define PWAIT 32 #define PLOCK 36 #define PPAUSE 40 #define PUSER 50 #define MAXPRI 127 /* Priorities range from 0 through MAXPRI. */ #define PRIMASK 0x0ff #define PCATCH 0x100 /* OR'd with pri for tsleep to check signals */ #define PNORELOCK 0x200 /* OR'd with pri for msleep to not reacquire the mutex */ #endif /* _KERNEL */ #define NODEV (dev_t)(-1) /* non-existent device */ #define ALIGNBYTES _ALIGNBYTES #define ALIGN(p) _ALIGN(p) #define ALIGNED_POINTER(p,t) _ALIGNED_POINTER(p,t) /* * File system parameters and macros. * * The file system is made out of blocks of at most MAXBSIZE units, with * smaller units (fragments) only in the last direct block. MAXBSIZE * primarily determines the size of buffers in the buffer pool. It may be * made larger without any effect on existing file systems; however making * it smaller makes some file systems unmountable. */ #ifdef _KERNEL #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */ #endif /* _KERNEL */ #define MAXBSIZE (64 * 1024) #define _DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ #define DEV_BSIZE (1 << _DEV_BSHIFT) #ifdef _KERNEL #define DEV_BSHIFT _DEV_BSHIFT #define BLKDEV_IOSIZE PAGE_SIZE #endif /* _KERNEL */ /* pages to disk blocks */ #ifndef ctod #define ctod(x) ((x) << (PAGE_SHIFT - _DEV_BSHIFT)) #endif #ifndef dtoc #define dtoc(x) ((x) >> (PAGE_SHIFT - _DEV_BSHIFT)) #endif /* bytes to disk blocks */ #ifndef btodb #define btodb(x) ((x) >> _DEV_BSHIFT) #endif #ifndef dbtob #define dbtob(x) ((x) << _DEV_BSHIFT) #endif /* * MAXPATHLEN defines the longest permissible path length after expanding * symbolic links. It is used to allocate a temporary buffer from the buffer * pool in which to do the name expansion, hence should be a power of two, * and must be less than or equal to MAXBSIZE. MAXSYMLINKS defines the * maximum number of symbolic links that may be expanded in a path name. * It should be set high enough to allow all legitimate uses, but halt * infinite loops reasonably quickly. */ #define MAXPATHLEN PATH_MAX #define MAXSYMLINKS SYMLOOP_MAX /* Macros to set/clear/test flags. */ #ifdef _KERNEL #define SET(t, f) ((t) |= (f)) #define CLR(t, f) ((t) &= ~(f)) #define ISSET(t, f) ((t) & (f)) #endif /* _KERNEL */ /* Bit map related macros. */ #define setbit(a,i) ((a)[(i)>>3] |= 1<<((i)&(NBBY-1))) #define clrbit(a,i) ((a)[(i)>>3] &= ~(1<<((i)&(NBBY-1)))) #define isset(a,i) ((a)[(i)>>3] & (1<<((i)&(NBBY-1)))) #define isclr(a,i) (((a)[(i)>>3] & (1<<((i)&(NBBY-1)))) == 0) /* Macros for counting and rounding. */ #ifndef howmany #define howmany(x, y) (((x)+((y)-1))/(y)) #endif #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) #define powerof2(x) ((((x)-1)&(x))==0) /* Macros for min/max. */ #define MIN(a,b) (((a)<(b))?(a):(b)) #define MAX(a,b) (((a)>(b))?(a):(b)) /* Macros for calculating the offset of a field */ #if !defined(offsetof) && defined(_KERNEL) #if __GNUC_PREREQ__(4, 0) #define offsetof(s, e) __builtin_offsetof(s, e) #else #define offsetof(s, e) ((size_t)&((s *)0)->e) #endif #endif /* !defined(offsetof) && defined(_KERNEL) */ #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0])) /* * Scale factor for scaled integers used to count %cpu time and load avgs. * * The number of CPU `tick's that map to a unique `%age' can be expressed * by the formula (1 / (2 ^ (FSHIFT - 11))). The maximum load average that * can be calculated (assuming 32 bits) can be closely approximated using * the formula (2 ^ (2 * (16 - FSHIFT))) for (FSHIFT < 15). * * For the scheduler to maintain a 1:1 mapping of CPU `tick' to `%age', * FSHIFT must be at least 11; this gives us a maximum load avg of ~1024. */ #define _FSHIFT 11 /* bits to right of fixed binary point */ #ifdef _KERNEL #define FSHIFT _FSHIFT #endif #define FSCALE (1<<_FSHIFT) #endif /* !_SYS_PARAM_H_ */
