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