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 */