/*- * 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. * * @(#)param.h 8.3 (Berkeley) 4/4/95 * $FreeBSD: src/sys/sys/param.h,v 1.61.2.38 2003/05/22 17:12:01 fjoe Exp $ */ #ifndef _SYS_PARAM_H_ #define _SYS_PARAM_H_ /* * Historic BSD #defines -- probably will remain untouched for all time. */ #define BSD 199506 /* System version (year & month). */ #define BSD4_3 1 #define BSD4_4 1 /* * __DragonFly_version number. The number doesn't really meaningfully * translate to a version number. * * 170000 - base development version after 1.6 branch * 170001 - base development version before 1.8 branch * 190000 - base development version after 1.8 branch * 195000 - base development version after 1.10 branch * 197500 - base development version before 1.12 branch * 197600 - 1.12 branch * 197700 - base development version after 1.12 branch * 199900 - base development version before 2.0 branch * 200000 - 2.0 branch * 200100 - base development version after 2.0 branch * 200101 - lchflags syscall * 200200 - 2.2 branch * 200201 - base development version after 2.2 branch * 200202 - major changes to libc * 200203 - introduce PCI domain * 200204 - suser() & suser_cred() removal * 200205 - devfs import * 200206 - *sleep() renames * 200400 - 2.4 release * 200500 - 2.5 master * 200600 - 2.6 release * 200700 - 2.7 master * 200800 - 2.8 release October 2010 * 200900 - 2.9 master * 200901 - prototype changes for alphasort(3) and scandir(3) * 200902 - Xerox NS protocol removal * 201000 - 2.10 release * 201100 - 2.11 master * 201200 - 2.12 release * 201300 - 2.13 master * 201301 - header rename: <vfs/gnu/ext2fs/...> -> <gnu/vfs/ext2fs/...> * 201302 - header <crypt.h> is gone * 201303 - <netatalk/...> and <netproto/atalk/...> are gone * 201304 - Added wcscasecmp, wcsncasecmp to libc * 201305 - Sync libm with NetBSD-current libm (new functions added) * 201306 - Sync libm with FreeBSD-current libm (~50 new functions) * 300000 - 3.0 release * 300100 - 3.1 master * 300101 - i4b (ISDN) removal * 300102 - <sys/ata.h> is now just a link of <sys/nata.h> * 300103 - if SIG_IGN is set on SIGCHLD, do not keep zombie children * 300200 - 3.2 release * 300300 - 3.3 master * 300301 - Add eaccess syscall * 300302 - fpsave changes - ucontext_t, mcontext_t, sigcontext, sigframe * 300303 - Demarcation of old m4/flex with new m4/flex * 300304 - Update to dialog-1.2-20121230 * 300400 - 3.4 release * 300500 - 3.5 master * 300501 - Convert libm to FreeBSD's version * 300502 - GEM and i915 KMS support in kernel * 300503 - Upgrade libiconv, locales, and associated libc functions * 300600 - 3.6 release * 300700 - 3.7 master * 300701 - Relocate bus/smbus/smb.h to dev/smbus/smb/smb.h * 300702 - drm/i915 update * 300703 - Make usb4bsd default * 300704 - Removal of IPX, NCP and NWFS support * 300705 - Removal of ATM support. * 300800 - 3.8 release * 300900 - 3.9 master * 300901 - drm/i915 hardware context support added * 400000 - 4.0 release * 400100 - 4.1 development * 400101 - Removal of SCTP support. * 400102 - Sound system update from FreeBSD * 400103 - Milestone - availability of gcc50 in base * 400104 - struct lwp_params (a public struct) members renaming * 400105 - Switch to gcc50 as the primary compiler * 400106 - Added pipe2() system call * 400107 - Add futimens() and utimensat() syscalls * 400200 - 4.2 release * 400300 - 4.3 development * 400301 - posix compliant iconv (no const qualifier) * 400302 - Replacement of libm with OpenBSD's libm * 400303 - environ and __progname are no longer linkable symbols * 400304 - Activate symbol versioning for libc.so (still on version 8) * 400305 - Add accept4() system call * 400306 - Add libexecinfo to base * 400307 - drm/i915 kernel module renamed to i915.ko * 400308 - <malloc.h> removal * 400309 - Add lwp_setname() system call * 400400 - 4.4 release * 400500 - 4.5 development * 400501 - unionfs removal * 400502 - private libraries: ssh ldns edit ncurses * 400503 - libarchive-3.0.2 import (add bsdcat) * 400600 - 4.6 release * 400700 - 4.7 development * 400701 - getline() visibility changes * 400702 - private library: libressl * 400703 - resolved conflicts of md, crypt and ressl libraries * 400704 - binutils update to 2.27 * 400705 - lwp_{set,get}affinity() * 400706 - sched_{set,get}affinity() * 400707 - pthread_{set,get}affinity_np() * 400708 - lwp_create2() * 400709 - pthread_attr_{set,get}affinity_np() * 400710 - sched_getcpu(); * 400711 - move lwp syscalls to sys/lwp.h * 400712 - restore lwp syscalls (except lwp_create*) declaration * 400713 - add sysctl kern.cp_times * 400800 - 4.8 release * 400900 - 4.9 development * 400901 - moved sigtramp, NX protection, sigtramp sysctl * 400902 - change CPU_SETSIZE to signed; allow proc to change self affinity * 400903 - malloc_type cleanup * 400904 - pad rtstatistics * 400905 - PTHREAD_STACK_MIN increase: 1024 => 16384 * 400906 - lwpid_t >=1, instead of >=0 * 400907 - pthread_getthreadid_np() * 400908 - {clock,pthread}_getcpuclockid() * 400909 - deleted ortentry, SIOC{ADD,DEL}RT, RTM_OLD{ADD,DEL} * 400910 - routing table is only available on netisr_ncpus * 500000 - 5.0 release * 500100 - 5.1 development * 500101 - kernel ppp removal * 500102 - <sys/sysref{,2}.h> inclusions removed from some public headers * 500103 - faith removal * 500104 - cfmakesane() * 500105 - _SC_LEVEL1_DCACHE_LINESIZE sysconf() * 500106 - %b and %r formats removal * 500107 - <machine/apm_bios.h> removal * 500200 - 5.2 release * 500300 - 5.3 development * 500301 - rename some public UFS constants * 500302 - move IOCTLTRIM to a better header and rename it to DAIOCTRIM * 500303 - get rid of sgtty (superseded by termios) * 500304 - remove IPSEC/FAST_IPSEC * 500305 - remove <sys/ioctl_compat.h> for good * 500306 - strsuftoll(), strsuftollx() * 500307 - tcsetsid() * 500308 - xdr_uint16_t() * 500309 - drop support for some ancient ioctls (OSIOCGIF*) * 500310 - remove more unimplemented ioctls * 500311 - add VIS_ALL to vis(3) * 500312 - OpenPAM Resedacea upgrade * 500313 - remove vmnet support from tap(4) (VMIO_* ioctls) * 500314 - add TAPGIFNAME to tap(4) * 500315 - add TUNGIFNAME to tun(4) * 500316 - add SIOC[ADG]IFGROUP, SIOCGIFGMEMB ioctl * 500317 - add wait6() and waitid() syscalls * 500400 - 5.4 release * 500500 - 5.5 development * 500501 - reallocarray() added to libc * 500502 - puffs etc. removed * 500503 - Lowered DATA rlimit supported by mmap(), libc sbrk() emulation * had to be rewritten. libc brk() removed entirely. These changes * are required to allow mmap hints to utilize lowered data rlimits. * 500504 - removed <sys/semaphore.h>, only <semaphore.h> remains * 500505 - rename <sys/termios.h> to <termios.h> * 500506 - LibreSSL, OpenSSH, XZ, libarchive update, libopie/libmd deprecation * 500600 - 5.6 release * 500700 - 5.7 development * 500701 - libopie/libmd removal * 500702 - TCP_KEEP* milliseconds -> seconds * 500703 - Static TLS bindings support for late-loaded shared libraries * 500704 - Announce IP6 address flag changes via route(4) * 500705 - Move us to utmpx only, delete utmp * 500706 - Switch to the now common three argument versions of the * timespecadd() and timespecsub() macros in <sys/time.h> * Also: RTM_VERSION bump to 7; CMSG alignment raised from 4B to 8B * 500707 - libradius/libtacplus removal * 500708 - Handle SIOCSIFMTU directly in tap(4) to support MTU > 1500 * 500709 - Implement lwp_getname() and signal safety * 500710 - Implement getrandom() and __realpath() system calls * 500800 - 5.8 release * 500900 - 5.9 development * 500901 - fparseln() was moved from libutil to libc * 500902 - unlocked flavors of fflush(), fputc(), fputs(), fread(), fwrite() * 500903 - add SIOCGIFXMEDIA ioctl * 500904 - add IPPROTO_IP/IP_RECVTOS. * 500905 - add IPPROTO_IP/IP_SENDSRCADDR and IP_TOS control message. * 500906 - add struct ip_mreqn for IPPROTO_IP/IP_MULTICAST_IF, * IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP. * 500907 - add clock_nanosleep() * 500908 - add fexecve() (also byteswap.h exists as of this vers) * 500909 - add AF_ARP * 600000 - 6.0 release * 600100 - 6.1 development * 600101 - kernel_{map,pmap,object} and {buffer,clean,pager}_map globals * become pointers * 600102 - add nvmm(4) and libnvmm(3) * 600103 - remove the old vmm code * 600104 - add posix_fallocate() * 600105 - add fdatasync() * 600106 - msdosfs support in makefs(8) * 600107 - remove sys/gnu/vfs/ext2fs * 600200 - 6.2 release * 600300 - 6.3 development * 600301 - add strerror_l() * 600302 - change sysctl KERN_PROC behavior * 600400 - 6.4 release * 600500 - 6.5 development * 600501 - add fopencookie(3) * 600502 - WIFSIGNALED(x) excludes SIGCONT * 600503 - kldstat(2) supports module's full path * 600504 - change m_copyback(9) to forbid mbuf expansion * 600505 - add SO_USER_COOKIE to setsockopt(2)/getsockopt(2) * 600506 - add mbuf m_pkthdr.loop_cnt for loop detection * 600507 - remove mbuf m_pkthdr.loop_cnt and replace with * if_tunnel_check_nesting() * 600508 - add ND6_IFF_AUTO_LINKLOCAL and ND6_IFF_NO_DAD; * change ip6.accept_rtadv and ip6.auto_linklocal behavior * 600509 - add futimesat() (legacy function), add HAVE_FUTIMESAT * 600510 - add PROC_REAP_KILL to procctl(2) * 600511 - remove <timers.h> * 600512 - remove obsolete DSO_COMPATMBR from <sys/disk.h> * 600513 - add F_MAXFD and support POSIX O_CLOFORK * 600514 - libusb(3) added libusb_get_version(), libusb_get_port_number(), * and libusb_set_auto_detach_kernel_driver(). * 600515 - remove /dev/crypto pseudo-device / cryptodev(4) * 600516 - remove in-kernel crypto(9) framework, aesni(4) and * /usr/include/crypto * 600517 - add DSO_NOMBR to <sys/disk.h> * 600518 - remove DSO_NOMBR from <sys/disk.h> * 600519 - add cpuid member to 'struct u_rman' and 'struct devinfo_rman' * 600520 - remove DIOCGSLICEINFO and DIOCSYNCSLICEINFO */ #undef __DragonFly_version #define __DragonFly_version 600520 /* propagated to newvers */ #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>) */ #include <sys/syslimits.h> #define MAXCOMLEN 16 /* max command name remembered */ #define MAXINTERP 32 /* max interpreter file name length */ #define MAXLOGNAME 33 /* max login name length (incl. 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 */ #define NOGROUP 65535 /* marker for empty group set member */ #define MAXHOSTNAMELEN 256 /* max hostname size */ #define SPECNAMELEN 63 /* max length of devicename */ /* More types and definitions used throughout the kernel. */ #ifdef _KERNEL #include <sys/cdefs.h> #include <sys/errno.h> #include <sys/time.h> #define FALSE 0 #define TRUE 1 #endif #ifndef _KERNEL /* Signals. */ #include <sys/select.h> #include <sys/signal.h> #endif /* Machine type dependent parameters. */ #include <machine/alignbytes.h> #include <machine/param.h> #ifndef _KERNEL #include <machine/limits.h> #endif /* * WARNING! Max supported cpu's due to PWAKEUP_CPUMASK is 16384. */ #define PCATCH 0x00000100 /* tsleep checks signals */ #define PUSRFLAG1 0x00000200 /* Subsystem specific flag */ #define PINTERLOCKED 0x00000400 /* Interlocked tsleep */ #define PWAKEUP_CPUMASK 0x00003FFF /* start cpu for chained wakeups */ #define PWAKEUP_MYCPU 0x00004000 /* wakeup on current cpu only */ #define PWAKEUP_ONE 0x00008000 /* argument to wakeup: only one */ #define PDOMAIN_MASK 0xFFFF0000 /* address domains for wakeup */ #define PDOMAIN_UMTX 0x00010000 /* independant domain for UMTX */ #define PDOMAIN_XLOCK 0x00020000 /* independant domain for fifo_lock */ #define PDOMAIN_FBSD0 0x01000000 /* freebsd sleepq queues */ #define PDOMAIN_FBSDINC 0x00010000 /* freebsd sleepq queue 1 */ #define PWAKEUP_ENCODE(domain, cpu) ((domain) | (cpu)) #define PWAKEUP_DECODE(domain) ((domain) & PWAKEUP_CPUMASK) #define NZERO 0 /* default "nice" */ #define NBBY 8 /* number of bits in a byte */ #define NBPW sizeof(int) /* number of bytes per word (integer) */ #define CMASK 022 /* default file mask: S_IWGRP|S_IWOTH */ #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) #define NOUDEV (dev_t)(-1) /* non-existent device */ #define NOMAJ 256 /* non-existent device */ #endif #ifndef _KERNEL #define NODEV (dev_t)(-1) /* non-existent device */ #endif /* * cpu_mi_feature bits */ #define CPU_MI_BZERONT 0x00000001 #define CPU_MI_MONITOR 0x00000010 /* * File system parameters and macros. * * MAXBSIZE - Filesystems are made out of blocks of at most MAXBSIZE bytes * per block. MAXBSIZE may be made larger without effecting * any existing filesystems as long as it does not exceed MAXPHYS, * and may be made smaller at the risk of not being able to use * filesystems which require a block size exceeding MAXBSIZE. * * NBUFCALCSIZE - Calculate sufficient buffer cache buffers for the memory * desired as if each buffer were sized to this value (actual * real memory use). Hysteresis works both ways. */ #define MAXBSIZE 65536 /* must be power of 2 */ #define NBUFCALCSIZE 16384 /* for nbuf calculation only */ #define MAXFRAG 8 /* * 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 32 /* Bit map related macros. */ #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) /* Macros for counting and rounding. */ #ifndef howmany #define howmany(x, y) (((x)+((y)-1))/(y)) #endif #define nitems(x) NELEM(x) #define rounddown(x, y) (((x)/(y))*(y)) #define rounddown2(x, y) ((x) & ~((y) - 1)) /* y power of two */ #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */ #define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */ #define powerof2(x) ((((x)-1)&(x))==0) /* * VM objects can be larger than the virtual address space, make sure * we don't cut-off the mask. */ #define trunc_page64(x) ((x) & ~(int64_t)PAGE_MASK) #define round_page64(x) (((x) + PAGE_MASK) & ~(int64_t)PAGE_MASK) /* * Round p (pointer or byte index) up to a correctly-aligned value * for all data types (int, long, ...). The result is unsigned int * and must be cast to any desired pointer type. Single underscore * versions are for FreeBSD/OpenBSD compat. */ #define _ALIGNBYTES __ALIGNBYTES #define _ALIGN(p) __ALIGNPTR(p) #ifndef ALIGNBYTES #define ALIGNBYTES __ALIGNBYTES #endif #ifndef ALIGN #define ALIGN(p) __ALIGNPTR(p) #endif /* Macros for min/max. */ #define MIN(a,b) (((a)<(b))?(a):(b)) #define MAX(a,b) (((a)>(b))?(a):(b)) /* Macro for array size */ #define NELEM(ary) (sizeof(ary) / sizeof((ary)[0])) /* * Constants for setting the parameters of the kernel memory allocator. * * 2 ** MINBUCKET is the smallest unit of memory that will be * allocated. It must be at least large enough to hold a pointer. * * Units of memory less or equal to MAXALLOCSAVE will permanently * allocate physical memory; requests for these size pieces of * memory are quite fast. Allocations greater than MAXALLOCSAVE must * always allocate and free physical memory; requests for these * size allocations should be done infrequently as they will be slow. * * Constraints: PAGE_SIZE <= MAXALLOCSAVE <= 2 ** (MINBUCKET + 14), and * MAXALLOCSIZE must be a power of two. */ #define MINBUCKET 4 /* 4 => min allocation of 16 bytes */ #define MAXALLOCSAVE (2 * PAGE_SIZE) /* * 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 */ #define FSCALE (1<<FSHIFT) #define dbtoc(db) /* calculates devblks to pages */ \ ((db + (ctodb(1) - 1)) >> (PAGE_SHIFT - DEV_BSHIFT)) #define ctodb(db) /* calculates pages to devblks */ \ ((db) << (PAGE_SHIFT - DEV_BSHIFT)) #define MJUMPAGESIZE PAGE_SIZE /* jumbo cluster 4k */ #define MJUM9BYTES (9 * 1024) /* jumbo cluster 9k */ #define MJUM16BYTES (16 * 1024) /* jumbo cluster 16k */ /* * MBUF Management. * * Because many drivers can't deal with multiple DMA segments all mbufs * must avoid crossing a page boundary. While we can accomodate mbufs * which are not a power-of-2 sized kmalloc() will only guarantee * non-crossing alignment if we use a power-of-2. 256 is no longer large * enough due to m_hdr and m_pkthdr bloat. * * MCLBYTES must be a power of 2 and is typically significantly larger * than MSIZE, sufficient to hold a standard-mtu packet. 2K is considered * reasonable. */ #ifndef MSIZE #define MSIZE 512 /* size of an mbuf */ #endif #ifndef MCLSHIFT #define MCLSHIFT 11 /* convert bytes to m_buf clusters */ #endif #define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */ #define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */ /* * Make this available for most of the kernel. There were too many * things that included sys/systm.h just for panic(). */ #ifdef _KERNEL void panic (const char *, ...) __dead2 __printflike(1, 2); #endif #ifndef _BYTEORDER_FUNC_DEFINED #define _BYTEORDER_FUNC_DEFINED #define htonl(x) __htonl(x) #define htons(x) __htons(x) #define ntohl(x) __ntohl(x) #define ntohs(x) __ntohs(x) #endif /* * Access a variable length array that has been declared as a fixed * length array. */ #define __PAST_END(array, offset) (((__typeof__(*(array)) *)(array))[offset]) #endif /* _SYS_PARAM_H_ */
