1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _SYS_PARAM_H 41 #define _SYS_PARAM_H 42 43 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 44 #include <sys/types.h> 45 #include <sys/isa_defs.h> 46 #endif /* _ASM */ 47 48 #include <sys/null.h> 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 /* 55 * Fundamental variables; don't change too often. 56 */ 57 58 /* 59 * _POSIX_VDISABLE has historically been defined in <sys/param.h> since 60 * an early merge with AT&T source. It has also historically been defined 61 * in <sys/termios.h>. The POSIX standard, IEEE Std. 1003.1-1988 initially 62 * required the existence of _POSIX_VDISABLE in <sys/termios.h>. 63 * Subsequent versions of the IEEE Standard as well as the X/Open 64 * specifications required that _POSIX_VDISABLE be defined in <unistd.h> 65 * while still allowing for it's existence in other headers. With the 66 * introduction of XPG6, _POSIX_VDISABLE can only be defined in <unistd.h>. 67 */ 68 #if !defined(_XPG6) || defined(__EXTENSIONS__) 69 #ifndef _POSIX_VDISABLE 70 #define _POSIX_VDISABLE 0 /* Disable special character functions */ 71 #endif 72 #endif /* !defined(_XPG6) || defined(__EXTENSIONS__) */ 73 74 /* The actual size of the TTY input queue */ 75 #define _TTY_BUFSIZ 2048 76 77 /* 78 * These defines all have their historical value. The actual size of the tty 79 * buffer both for the line-editor in ldterm, and in general, is above as 80 * _TTY_BUFSIZ. 81 * 82 * We leave these defines at their historical value to match the behaviour of 83 * BSD and Linux. 84 */ 85 #ifndef MAX_INPUT 86 #define MAX_INPUT 512 /* Maximum bytes stored in the input queue */ 87 #endif 88 #ifndef MAX_CANON 89 #define MAX_CANON 256 /* Maximum bytes for canonical processing */ 90 #endif 91 #define CANBSIZ 256 /* max size of typewriter line */ 92 93 94 #define UID_NOBODY 60001 /* user ID no body */ 95 #define GID_NOBODY UID_NOBODY 96 #define UID_UNKNOWN 96 97 #define GID_UNKNOWN UID_UNKNOWN 98 #define UID_DLADM 15 99 #define UID_NETADM 16 100 #define GID_NETADM 65 101 #define UID_NOACCESS 60002 /* user ID no access */ 102 103 #ifdef _KERNEL 104 #define MAX_TASKID 999999 105 #define MAX_MAXPID 999999 106 #define MAXEPHUID 0xfffffffcu /* max ephemeral user id */ 107 108 #define FAMOUS_PID_SCHED 0 109 #define FAMOUS_PID_INIT 1 110 #define FAMOUS_PID_PAGEOUT 2 111 #define FAMOUS_PID_FSFLUSH 3 112 #define FAMOUS_PIDS 4 113 #endif 114 115 #ifdef DEBUG 116 #define DEFAULT_MAXPID 999999 117 #define DEFAULT_JUMPPID 100000 118 #else 119 #define DEFAULT_MAXPID 30000 120 #define DEFAULT_JUMPPID 0 121 #endif 122 123 #define MAXUID 2147483647 /* max user id */ 124 125 #define MAXPROJID MAXUID /* max project id */ 126 #define MAXLINK 32767 /* max links */ 127 128 #define MINEPHUID 0x80000000u /* min ephemeral user id */ 129 130 #define NMOUNT 40 /* est. of # mountable fs for quota calc */ 131 132 #define NOFILE 20 /* this define is here for */ 133 /* compatibility purposes only */ 134 /* and will be removed in a */ 135 /* later release */ 136 137 /* 138 * These define the maximum and minimum allowable values of the 139 * configurable parameter NGROUPS_MAX. 140 */ 141 #define NGROUPS_UMIN 0 142 #define NGROUPS_UMAX 1024 143 #define NGROUPS_OLDMAX 32 144 145 /* 146 * NGROUPS_MAX_DEFAULT: *MUST* match NGROUPS_MAX value in limits.h. 147 */ 148 #define NGROUPS_MAX_DEFAULT 16 149 150 /* 151 * Default process priority. Keep it in sync with limits.h. 152 */ 153 #define NZERO 20 154 155 /* 156 * Fundamental constants of the implementation--cannot be changed easily. 157 */ 158 159 #define NBPW sizeof (int) /* number of bytes in an integer */ 160 161 #define CMASK 022 /* default mask for file creation */ 162 #define CDLIMIT (1L<<11) /* default max write address */ 163 #define NBPS 0x20000 /* Number of bytes per segment */ 164 #define NBPSCTR 512 /* Bytes per disk sector. */ 165 #define UBSIZE 512 /* unix block size. */ 166 #define SCTRSHFT 9 /* Shift for BPSECT. */ 167 168 #ifdef _LITTLE_ENDIAN 169 #define lobyte(X) (((unsigned char *)&(X))[0]) 170 #define hibyte(X) (((unsigned char *)&(X))[1]) 171 #define loword(X) (((ushort_t *)&(X))[0]) 172 #define hiword(X) (((ushort_t *)&(X))[1]) 173 #endif 174 #ifdef _BIG_ENDIAN 175 #define lobyte(X) (((unsigned char *)&(X))[1]) 176 #define hibyte(X) (((unsigned char *)&(X))[0]) 177 #define loword(X) (((ushort_t *)&(X))[1]) 178 #define hiword(X) (((ushort_t *)&(X))[0]) 179 #endif 180 181 /* REMOTE -- whether machine is primary, secondary, or regular */ 182 #define SYSNAME 9 /* # chars in system name */ 183 #define PREMOTE 39 184 185 /* 186 * MAXPATHLEN defines the longest permissible path length, 187 * including the terminating null, after expanding symbolic links. 188 * TYPICALMAXPATHLEN is used in a few places as an optimization 189 * with a local buffer on the stack to avoid kmem_alloc(). 190 * MAXSYMLINKS defines the maximum number of symbolic links 191 * that may be expanded in a path name. It should be set high 192 * enough to allow all legitimate uses, but halt infinite loops 193 * reasonably quickly. 194 * MAXNAMELEN is the length (including the terminating null) of 195 * the longest permissible file (component) name. 196 */ 197 #define MAXPATHLEN 1024 198 #define TYPICALMAXPATHLEN 64 199 #define MAXSYMLINKS 20 200 #define MAXNAMELEN 256 201 202 /* 203 * MAXLINKNAMELEN defines the longest possible permitted datalink name, 204 * including the terminating NUL. Note that this must not be larger 205 * than related networking constants such as LIFNAMSIZ. 206 */ 207 #define MAXLINKNAMELEN 32 208 209 #ifndef NADDR 210 #define NADDR 13 211 #endif 212 213 /* 214 * The following are defined to be the same as 215 * defined in /usr/include/limits.h. They are 216 * needed for pipe and FIFO compatibility. 217 */ 218 #ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */ 219 #define PIPE_BUF 5120 220 #endif /* PIPE_BUF */ 221 222 #ifndef PIPE_MAX /* max # bytes written to a pipe in a write */ 223 #define PIPE_MAX 5120 224 #endif /* PIPE_MAX */ 225 226 #ifndef NBBY 227 #define NBBY 8 /* number of bits per byte */ 228 #endif 229 230 /* macros replacing interleaving functions */ 231 #define dkblock(bp) ((bp)->b_blkno) 232 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 233 234 /* 235 * File system parameters and macros. 236 * 237 * The file system is made out of blocks of at most MAXBSIZE units, 238 * with smaller units (fragments) only in the last direct block. 239 * MAXBSIZE primarily determines the size of buffers in the buffer 240 * pool. It may be made larger without any effect on existing 241 * file systems; however making it smaller make make some file 242 * systems unmountable. 243 * 244 * Note that the blocked devices are assumed to have DEV_BSIZE 245 * "sectors" and that fragments must be some multiple of this size. 246 */ 247 #define MAXBSIZE 8192 248 #define DEV_BSIZE 512 249 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 250 #define MAXFRAG 8 251 #ifdef _SYSCALL32 252 #define MAXOFF32_T 0x7fffffff 253 #endif 254 #ifdef _LP64 255 #define MAXOFF_T 0x7fffffffffffffffl 256 #define MAXOFFSET_T 0x7fffffffffffffffl 257 #else 258 #define MAXOFF_T 0x7fffffffl 259 #ifdef _LONGLONG_TYPE 260 #define MAXOFFSET_T 0x7fffffffffffffffLL 261 #else 262 #define MAXOFFSET_T 0x7fffffff 263 #endif 264 #endif /* _LP64 */ 265 266 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 267 ((unsigned long)(bytes) >> DEV_BSHIFT) 268 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 269 ((unsigned long)(db) << DEV_BSHIFT) 270 271 /* 64 bit versions of btodb and dbtob */ 272 #define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 273 ((u_offset_t)(bytes) >> DEV_BSHIFT) 274 #define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \ 275 ((u_offset_t)(db) << DEV_BSHIFT) 276 277 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 278 #ifndef NODEV 279 #define NODEV (dev_t)(-1l) 280 #ifdef _SYSCALL32 281 #define NODEV32 (dev32_t)(-1) 282 #endif /* _SYSCALL32 */ 283 #endif /* NODEV */ 284 #endif /* _ASM */ 285 286 /* 287 * Size of arg list passed in by user. 288 */ 289 #define NCARGS32 0x100000 290 #define NCARGS64 0x200000 291 #ifdef _LP64 292 #define NCARGS NCARGS64 293 #else /* _LP64 */ 294 #define NCARGS NCARGS32 295 #endif /* _LP64 */ 296 297 /* 298 * Scale factor for scaled integers used to count 299 * %cpu time and load averages. 300 */ 301 #define FSHIFT 8 /* bits to right of fixed binary point */ 302 #define FSCALE (1<<FSHIFT) 303 304 /* 305 * Delay units are in microseconds. 306 * 307 * XXX These macros are not part of the DDI! 308 */ 309 #if defined(_KERNEL) && !defined(_ASM) 310 extern void drv_usecwait(clock_t); 311 #define DELAY(n) drv_usecwait(n) 312 #define CDELAY(c, n) \ 313 { \ 314 register int N = n; \ 315 while (--N > 0) { \ 316 if (c) \ 317 break; \ 318 drv_usecwait(1); \ 319 } \ 320 } 321 #endif /* defined(_KERNEL) && !defined(_ASM) */ 322 323 #ifdef __cplusplus 324 } 325 #endif 326 327 /* 328 * The following is to free utilities from machine dependencies within 329 * an architecture. Must be included after definition of DEV_BSIZE. 330 */ 331 332 #if (defined(_KERNEL) || defined(_KMEMUSER)) 333 334 #if defined(_MACHDEP) 335 #include <sys/machparam.h> 336 #endif 337 338 #ifdef __cplusplus 339 extern "C" { 340 #endif 341 342 #if defined(_KERNEL) && !defined(_ASM) 343 extern int cpu_decay_factor; 344 extern pid_t maxpid; 345 extern pid_t jump_pid; 346 347 extern uintptr_t _kernelbase; 348 extern uintptr_t _userlimit; 349 extern uintptr_t _userlimit32; 350 #endif /* defined(_KERNEL) && !defined(_ASM) */ 351 352 /* 353 * These three variables have been added within the #if defined(lint) 354 * below to ensure visibility to lint. This is a short term workaround 355 * to handle poor interaction between SS12 lint and these variables. 356 * CR 6742611 has been logged to address these issues. 357 */ 358 #if defined(lint) 359 extern int snooping; 360 extern uint_t snoop_interval; 361 extern const unsigned int _pageshift; 362 #endif /* lint */ 363 364 #if !defined(_MACHDEP) 365 366 /* 367 * Implementation architecture independent sections of the kernel use 368 * this section. 369 */ 370 #if defined(_KERNEL) && !defined(_ASM) 371 extern int hz; 372 extern int snooping; 373 extern uint_t snoop_interval; 374 extern const unsigned long _pagesize; 375 extern const unsigned int _pageshift; 376 extern const unsigned long _pageoffset; 377 extern const unsigned long long _pagemask; 378 extern const unsigned long _mmu_pagesize; 379 extern const unsigned int _mmu_pageshift; 380 extern const unsigned long _mmu_pageoffset; 381 extern const unsigned long _mmu_pagemask; 382 extern const uintptr_t _argsbase; 383 extern const unsigned long _defaultstksz; 384 extern const unsigned int _nbpg; 385 extern const int _ncpu; 386 extern const int _ncpu_log2; 387 extern const int _ncpu_p2; 388 extern const int _clsize; 389 #endif /* defined(_KERNEL) && !defined(_ASM) */ 390 391 /* Any additions to these #defines must be reflected in mdb_param.h+mdb_ks.c */ 392 #define PAGESIZE _pagesize 393 #define PAGESHIFT _pageshift 394 #define PAGEOFFSET _pageoffset 395 #define PAGEMASK _pagemask 396 #define MMU_PAGESIZE _mmu_pagesize 397 #define MMU_PAGESHIFT _mmu_pageshift 398 #define MMU_PAGEOFFSET _mmu_pageoffset 399 #define MMU_PAGEMASK _mmu_pagemask 400 401 #define KERNELBASE _kernelbase 402 #define USERLIMIT _userlimit 403 #define USERLIMIT32 _userlimit32 404 #define ARGSBASE _argsbase 405 #define DEFAULTSTKSZ _defaultstksz 406 #define NCPU _ncpu 407 #define NCPU_LOG2 _ncpu_log2 408 #define NCPU_P2 _ncpu_p2 409 410 #endif /* defined(_MACHDEP) */ 411 412 /* 413 * Some random macros for units conversion. 414 * 415 * These are machine independent but contain constants (*PAGESHIFT) which 416 * are only defined in the machine dependent file. 417 */ 418 419 /* 420 * MMU pages to bytes, and back (with and without rounding) 421 */ 422 #define mmu_ptob(x) ((x) << MMU_PAGESHIFT) 423 #define mmu_btop(x) (((x)) >> MMU_PAGESHIFT) 424 #define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT)) 425 426 /* 427 * 2 versions of pages to disk blocks 428 */ 429 #define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT)) 430 #define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT)) 431 432 /* 433 * pages to bytes, and back (with and without rounding) 434 * Large Files: The explicit cast of x to unsigned int is deliberately 435 * removed as part of large files work. We pass longlong values to 436 * theses macros. 437 * 438 * Cast the input to ptob() to be a page count. This enforces 64-bit 439 * math on 64-bit kernels. For 32-bit kernels, callers must explicitly 440 * cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE 441 * are possible. 442 */ 443 444 #ifdef _LP64 445 #define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT) 446 #else 447 #define ptob(x) ((x) << PAGESHIFT) 448 #endif /* _LP64 */ 449 #define btop(x) (((x) >> PAGESHIFT)) 450 #define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT)) 451 452 /* 453 * disk blocks to pages, rounded and truncated 454 */ 455 #define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */ 456 #define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT)) 457 #define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT)) 458 459 /* 460 * kB to pages and back 461 */ 462 #define kbtop(x) ((x) >> (PAGESHIFT - 10)) 463 #define ptokb(x) ((x) << (PAGESHIFT - 10)) 464 465 /* 466 * POSIX.4 related configuration parameters 467 */ 468 #define _AIO_LISTIO_MAX (4096) 469 #define _AIO_MAX (-1) 470 #define _MQ_OPEN_MAX (-1) 471 #define _MQ_PRIO_MAX (32) 472 #define _SEM_NSEMS_MAX INT_MAX 473 #define _SEM_VALUE_MAX INT_MAX 474 475 #ifdef __cplusplus 476 } 477 #endif 478 479 #else /* (defined(_KERNEL) || defined(_KMEMUSER)) */ 480 481 /* 482 * The following are assorted machine dependent values which can be 483 * obtained in a machine independent manner through sysconf(2) or 484 * sysinfo(2). In order to guarantee that these provide the expected 485 * value at all times, the System Private interface (leading underscore) 486 * is used. 487 */ 488 489 #include <sys/unistd.h> 490 491 #ifdef __cplusplus 492 extern "C" { 493 #endif 494 495 #if !defined(_ASM) 496 extern long _sysconf(int); /* System Private interface to sysconf() */ 497 #endif /* !defined(_ASM) */ 498 499 #define HZ ((clock_t)_sysconf(_SC_CLK_TCK)) 500 #define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK))) 501 #define PAGESIZE (_sysconf(_SC_PAGESIZE)) 502 #define PAGEOFFSET (PAGESIZE - 1) 503 #define PAGEMASK (~PAGEOFFSET) 504 #define MAXPID ((pid_t)_sysconf(_SC_MAXPID)) 505 #define MAXEPHUID ((uid_t)_sysconf(_SC_EPHID_MAX)) 506 507 #ifdef __cplusplus 508 } 509 #endif 510 511 #endif /* (defined(_KERNEL) || defined(_KMEMUSER)) && defined(_MACHDEP) */ 512 513 #endif /* _SYS_PARAM_H */ 514