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 */