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 #if !defined(_ASM) 160 #define NBPW sizeof (int) /* number of bytes in an integer */ 161 #endif /* _ASM */ 162 163 #define CMASK 022 /* default mask for file creation */ 164 #define CDLIMIT (1L<<11) /* default max write address */ 165 #define NBPS 0x20000 /* Number of bytes per segment */ 166 #define NBPSCTR 512 /* Bytes per disk sector. */ 167 #define UBSIZE 512 /* unix block size. */ 168 #define SCTRSHFT 9 /* Shift for BPSECT. */ 169 170 #ifdef _LITTLE_ENDIAN 171 #define lobyte(X) (((unsigned char *)&(X))[0]) 172 #define hibyte(X) (((unsigned char *)&(X))[1]) 173 #define loword(X) (((ushort_t *)&(X))[0]) 174 #define hiword(X) (((ushort_t *)&(X))[1]) 175 #endif 176 #ifdef _BIG_ENDIAN 177 #define lobyte(X) (((unsigned char *)&(X))[1]) 178 #define hibyte(X) (((unsigned char *)&(X))[0]) 179 #define loword(X) (((ushort_t *)&(X))[1]) 180 #define hiword(X) (((ushort_t *)&(X))[0]) 181 #endif 182 183 /* REMOTE -- whether machine is primary, secondary, or regular */ 184 #define SYSNAME 9 /* # chars in system name */ 185 #define PREMOTE 39 186 187 /* 188 * MAXPATHLEN defines the longest permissible path length, 189 * including the terminating null, after expanding symbolic links. 190 * TYPICALMAXPATHLEN is used in a few places as an optimization 191 * with a local buffer on the stack to avoid kmem_alloc(). 192 * MAXSYMLINKS defines the maximum number of symbolic links 193 * that may be expanded in a path name. It should be set high 194 * enough to allow all legitimate uses, but halt infinite loops 195 * reasonably quickly. 196 * MAXNAMELEN is the length (including the terminating null) of 197 * the longest permissible file (component) name. 198 */ 199 #define MAXPATHLEN 1024 200 #define TYPICALMAXPATHLEN 64 201 #define MAXSYMLINKS 20 202 #define MAXNAMELEN 256 203 204 /* 205 * MAXLINKNAMELEN defines the longest possible permitted datalink name, 206 * including the terminating NUL. Note that this must not be larger 207 * than related networking constants such as LIFNAMSIZ. 208 */ 209 #define MAXLINKNAMELEN 32 210 211 #ifndef NADDR 212 #define NADDR 13 213 #endif 214 215 /* 216 * The following are defined to be the same as 217 * defined in /usr/include/limits.h. They are 218 * needed for pipe and FIFO compatibility. 219 */ 220 #ifndef PIPE_BUF /* max # bytes atomic in write to a pipe */ 221 #define PIPE_BUF 5120 222 #endif /* PIPE_BUF */ 223 224 #ifndef PIPE_MAX /* max # bytes written to a pipe in a write */ 225 #define PIPE_MAX 5120 226 #endif /* PIPE_MAX */ 227 228 #ifndef NBBY 229 #define NBBY 8 /* number of bits per byte */ 230 #endif 231 232 /* macros replacing interleaving functions */ 233 #define dkblock(bp) ((bp)->b_blkno) 234 #define dkunit(bp) (minor((bp)->b_dev) >> 3) 235 236 /* 237 * File system parameters and macros. 238 * 239 * The file system is made out of blocks of at most MAXBSIZE units, 240 * with smaller units (fragments) only in the last direct block. 241 * MAXBSIZE primarily determines the size of buffers in the buffer 242 * pool. It may be made larger without any effect on existing 243 * file systems; however making it smaller make make some file 244 * systems unmountable. 245 * 246 * Note that the blocked devices are assumed to have DEV_BSIZE 247 * "sectors" and that fragments must be some multiple of this size. 248 */ 249 #define MAXBSIZE 8192 250 #define DEV_BSIZE 512 251 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */ 252 #define MAXFRAG 8 253 #ifdef _SYSCALL32 254 #define MAXOFF32_T 0x7fffffff 255 #endif 256 #ifdef _LP64 257 #define MAXOFF_T 0x7fffffffffffffffl 258 #define MAXOFFSET_T 0x7fffffffffffffffl 259 #else 260 #define MAXOFF_T 0x7fffffffl 261 #ifdef _LONGLONG_TYPE 262 #define MAXOFFSET_T 0x7fffffffffffffffLL 263 #else 264 #define MAXOFFSET_T 0x7fffffff 265 #endif 266 #endif /* _LP64 */ 267 268 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 269 ((unsigned long)(bytes) >> DEV_BSHIFT) 270 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \ 271 ((unsigned long)(db) << DEV_BSHIFT) 272 273 /* 64 bit versions of btodb and dbtob */ 274 #define lbtodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \ 275 ((u_offset_t)(bytes) >> DEV_BSHIFT) 276 #define ldbtob(db) /* calculates (db * DEV_BSIZE) */ \ 277 ((u_offset_t)(db) << DEV_BSHIFT) 278 279 #ifndef _ASM /* Avoid typedef headaches for assembly files */ 280 #ifndef NODEV 281 #define NODEV (dev_t)(-1l) 282 #ifdef _SYSCALL32 283 #define NODEV32 (dev32_t)(-1) 284 #endif /* _SYSCALL32 */ 285 #endif /* NODEV */ 286 #endif /* _ASM */ 287 288 /* 289 * Size of arg list passed in by user. 290 */ 291 #define NCARGS32 0x100000 292 #define NCARGS64 0x200000 293 #ifdef _LP64 294 #define NCARGS NCARGS64 295 #else /* _LP64 */ 296 #define NCARGS NCARGS32 297 #endif /* _LP64 */ 298 299 /* 300 * Scale factor for scaled integers used to count 301 * %cpu time and load averages. 302 */ 303 #define FSHIFT 8 /* bits to right of fixed binary point */ 304 #define FSCALE (1<<FSHIFT) 305 306 /* 307 * Delay units are in microseconds. 308 * 309 * XXX These macros are not part of the DDI! 310 */ 311 #if defined(_KERNEL) && !defined(_ASM) 312 extern void drv_usecwait(clock_t); 313 #define DELAY(n) drv_usecwait(n) 314 #define CDELAY(c, n) \ 315 { \ 316 register int N = n; \ 317 while (--N > 0) { \ 318 if (c) \ 319 break; \ 320 drv_usecwait(1); \ 321 } \ 322 } 323 #endif /* defined(_KERNEL) && !defined(_ASM) */ 324 325 #ifdef __cplusplus 326 } 327 #endif 328 329 /* 330 * The following is to free utilities from machine dependencies within 331 * an architecture. Must be included after definition of DEV_BSIZE. 332 */ 333 334 #if defined(_KERNEL) || defined(_KMEMUSER) || defined(_BOOT) 335 336 #if defined(_MACHDEP) 337 #include <sys/machparam.h> 338 #endif 339 340 #ifdef __cplusplus 341 extern "C" { 342 #endif 343 344 #if defined(_KERNEL) && !defined(_ASM) 345 extern int cpu_decay_factor; 346 extern pid_t maxpid; 347 extern pid_t jump_pid; 348 349 extern uintptr_t _kernelbase; 350 extern uintptr_t _userlimit; 351 extern uintptr_t _userlimit32; 352 #endif /* defined(_KERNEL) && !defined(_ASM) */ 353 354 /* 355 * These three variables have been added within the #if defined(lint) 356 * below to ensure visibility to lint. This is a short term workaround 357 * to handle poor interaction between SS12 lint and these variables. 358 * CR 6742611 has been logged to address these issues. 359 */ 360 #if defined(lint) 361 extern int snooping; 362 extern uint_t snoop_interval; 363 extern const unsigned int _pageshift; 364 #endif /* lint */ 365 366 #if !defined(_MACHDEP) 367 368 /* 369 * Implementation architecture independent sections of the kernel use 370 * this section. 371 */ 372 #if defined(_KERNEL) && !defined(_ASM) 373 extern int hz; 374 extern int snooping; 375 extern uint_t snoop_interval; 376 extern const unsigned long _pagesize; 377 extern const unsigned int _pageshift; 378 extern const unsigned long _pageoffset; 379 extern const unsigned long long _pagemask; 380 extern const unsigned long _mmu_pagesize; 381 extern const unsigned int _mmu_pageshift; 382 extern const unsigned long _mmu_pageoffset; 383 extern const unsigned long _mmu_pagemask; 384 extern const uintptr_t _argsbase; 385 extern const unsigned long _defaultstksz; 386 extern const unsigned int _nbpg; 387 extern const int _ncpu; 388 extern const int _ncpu_log2; 389 extern const int _ncpu_p2; 390 extern const int _clsize; 391 #endif /* defined(_KERNEL) && !defined(_ASM) */ 392 393 /* Any additions to these #defines must be reflected in mdb_param.h+mdb_ks.c */ 394 #define PAGESIZE _pagesize 395 #define PAGESHIFT _pageshift 396 #define PAGEOFFSET _pageoffset 397 #define PAGEMASK _pagemask 398 #define MMU_PAGESIZE _mmu_pagesize 399 #define MMU_PAGESHIFT _mmu_pageshift 400 #define MMU_PAGEOFFSET _mmu_pageoffset 401 #define MMU_PAGEMASK _mmu_pagemask 402 403 #define KERNELBASE _kernelbase 404 #define USERLIMIT _userlimit 405 #define USERLIMIT32 _userlimit32 406 #define ARGSBASE _argsbase 407 #define DEFAULTSTKSZ _defaultstksz 408 #define NCPU _ncpu 409 #define NCPU_LOG2 _ncpu_log2 410 #define NCPU_P2 _ncpu_p2 411 412 #endif /* defined(_MACHDEP) */ 413 414 /* 415 * Some random macros for units conversion. 416 * 417 * These are machine independent but contain constants (*PAGESHIFT) which 418 * are only defined in the machine dependent file. 419 */ 420 421 /* 422 * MMU pages to bytes, and back (with and without rounding) 423 */ 424 #define mmu_ptob(x) ((x) << MMU_PAGESHIFT) 425 #define mmu_btop(x) (((x)) >> MMU_PAGESHIFT) 426 #define mmu_btopr(x) ((((x) + MMU_PAGEOFFSET) >> MMU_PAGESHIFT)) 427 428 /* 429 * 2 versions of pages to disk blocks 430 */ 431 #define mmu_ptod(x) ((x) << (MMU_PAGESHIFT - DEV_BSHIFT)) 432 #define ptod(x) ((x) << (PAGESHIFT - DEV_BSHIFT)) 433 434 /* 435 * pages to bytes, and back (with and without rounding) 436 * Large Files: The explicit cast of x to unsigned int is deliberately 437 * removed as part of large files work. We pass longlong values to 438 * theses macros. 439 * 440 * Cast the input to ptob() to be a page count. This enforces 64-bit 441 * math on 64-bit kernels. For 32-bit kernels, callers must explicitly 442 * cast the input to be a 64-bit type if values greater than 4GB/PAGESIZE 443 * are possible. 444 */ 445 446 #ifdef _LP64 447 #define ptob(x) (((pgcnt_t)(x)) << PAGESHIFT) 448 #else 449 #define ptob(x) ((x) << PAGESHIFT) 450 #endif /* _LP64 */ 451 #define btop(x) (((x) >> PAGESHIFT)) 452 #define btopr(x) ((((x) + PAGEOFFSET) >> PAGESHIFT)) 453 454 /* 455 * disk blocks to pages, rounded and truncated 456 */ 457 #define NDPP (PAGESIZE/DEV_BSIZE) /* # of disk blocks per page */ 458 #define dtop(DD) (((DD) + NDPP - 1) >> (PAGESHIFT - DEV_BSHIFT)) 459 #define dtopt(DD) ((DD) >> (PAGESHIFT - DEV_BSHIFT)) 460 461 /* 462 * kB to pages and back 463 */ 464 #define kbtop(x) ((x) >> (PAGESHIFT - 10)) 465 #define ptokb(x) ((x) << (PAGESHIFT - 10)) 466 467 /* 468 * POSIX.4 related configuration parameters 469 */ 470 #define _AIO_LISTIO_MAX (4096) 471 #define _AIO_MAX (-1) 472 #define _MQ_OPEN_MAX (-1) 473 #define _MQ_PRIO_MAX (32) 474 #define _SEM_NSEMS_MAX INT_MAX 475 #define _SEM_VALUE_MAX INT_MAX 476 477 #ifdef __cplusplus 478 } 479 #endif 480 481 #else /* defined(_KERNEL) || defined(_KMEMUSER) || defined(_BOOT) */ 482 483 /* 484 * The following are assorted machine dependent values which can be 485 * obtained in a machine independent manner through sysconf(2) or 486 * sysinfo(2). In order to guarantee that these provide the expected 487 * value at all times, the System Private interface (leading underscore) 488 * is used. 489 */ 490 491 #include <sys/unistd.h> 492 493 #ifdef __cplusplus 494 extern "C" { 495 #endif 496 497 #if !defined(_ASM) 498 extern long _sysconf(int); /* System Private interface to sysconf() */ 499 #endif /* !defined(_ASM) */ 500 501 #define HZ ((clock_t)_sysconf(_SC_CLK_TCK)) 502 #define TICK (1000000000/((clock_t)_sysconf(_SC_CLK_TCK))) 503 #define PAGESIZE (_sysconf(_SC_PAGESIZE)) 504 #define PAGEOFFSET (PAGESIZE - 1) 505 #define PAGEMASK (~PAGEOFFSET) 506 #define MAXPID ((pid_t)_sysconf(_SC_MAXPID)) 507 #define MAXEPHUID ((uid_t)_sysconf(_SC_EPHID_MAX)) 508 509 #ifdef __cplusplus 510 } 511 #endif 512 513 #endif /* defined(_KERNEL) || defined(_KMEMUSER) || defined(_BOOT) */ 514 515 #endif /* _SYS_PARAM_H */ 516