2 * Copyright (c) 1989, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Mike Karels at Berkeley Software Design, Inc.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 4. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * @(#)sysctl.h 8.1 (Berkeley) 6/2/93
36 #ifndef _SYS_SYSCTL_H_
37 #define _SYS_SYSCTL_H_
39 #include <sys/queue.h>
43 * Definitions for sysctl call. The sysctl call uses a hierarchical name
44 * for objects that can be examined or modified. The name is expressed as
45 * a sequence of integers. Like a file path name, the meaning of each
46 * component depends on its place in the hierarchy. The top-level and kern
47 * identifiers are defined here, and other identifiers are defined in the
48 * respective subsystem header files.
51 #define CTL_MAXNAME 24 /* largest number of components supported */
54 * Each subsystem defined by sysctl defines a list of variables
55 * for that subsystem. Each name is either a node with further
56 * levels defined below it, or it is a leaf of some particular
57 * type given below. Each sysctl level defines a set of name/type
58 * pairs to be used by sysctl(8) in manipulating the subsystem.
61 char *ctl_name; /* subsystem name */
62 int ctl_type; /* type of name */
65 #define CTLTYPE 0xf /* mask for the type */
66 #define CTLTYPE_NODE 1 /* name is a node */
67 #define CTLTYPE_INT 2 /* name describes an integer */
68 #define CTLTYPE_STRING 3 /* name describes a string */
69 #define CTLTYPE_S64 4 /* name describes a signed 64-bit number */
70 #define CTLTYPE_OPAQUE 5 /* name describes a structure */
71 #define CTLTYPE_STRUCT CTLTYPE_OPAQUE /* name describes a structure */
72 #define CTLTYPE_UINT 6 /* name describes an unsigned integer */
73 #define CTLTYPE_LONG 7 /* name describes a long */
74 #define CTLTYPE_ULONG 8 /* name describes an unsigned long */
75 #define CTLTYPE_U64 9 /* name describes an unsigned 64-bit number */
77 #define CTLFLAG_RD 0x80000000 /* Allow reads of variable */
78 #define CTLFLAG_WR 0x40000000 /* Allow writes to the variable */
79 #define CTLFLAG_RW (CTLFLAG_RD|CTLFLAG_WR)
80 #define CTLFLAG_ANYBODY 0x10000000 /* All users can set this var */
81 #define CTLFLAG_SECURE 0x08000000 /* Permit set only if securelevel<=0 */
82 #define CTLFLAG_PRISON 0x04000000 /* Prisoned roots can fiddle */
83 #define CTLFLAG_DYN 0x02000000 /* Dynamic oid - can be freed */
84 #define CTLFLAG_SKIP 0x01000000 /* Skip this sysctl when listing */
85 #define CTLMASK_SECURE 0x00F00000 /* Secure level */
86 #define CTLFLAG_TUN 0x00080000 /* Default value is loaded from getenv() */
87 #define CTLFLAG_RDTUN (CTLFLAG_RD|CTLFLAG_TUN)
88 #define CTLFLAG_RWTUN (CTLFLAG_RW|CTLFLAG_TUN)
89 #define CTLFLAG_MPSAFE 0x00040000 /* Handler is MP safe */
90 #define CTLFLAG_VNET 0x00020000 /* Prisons with vnet can fiddle */
91 #define CTLFLAG_DYING 0x00010000 /* Oid is being removed */
92 #define CTLFLAG_CAPRD 0x00008000 /* Can be read in capability mode */
93 #define CTLFLAG_CAPWR 0x00004000 /* Can be written in capability mode */
94 #define CTLFLAG_STATS 0x00002000 /* Statistics, not a tuneable */
95 #define CTLFLAG_NOFETCH 0x00001000 /* Don't fetch tunable from getenv() */
96 #define CTLFLAG_CAPRW (CTLFLAG_CAPRD|CTLFLAG_CAPWR)
99 * Secure level. Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.
101 * Secure when the securelevel is raised to at least N.
103 #define CTLSHIFT_SECURE 20
104 #define CTLFLAG_SECURE1 (CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
105 #define CTLFLAG_SECURE2 (CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
106 #define CTLFLAG_SECURE3 (CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
109 * USE THIS instead of a hardwired number from the categories below
110 * to get dynamically assigned sysctl entries using the linker-set
111 * technology. This is the way nearly all new sysctl variables should
113 * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
115 #define OID_AUTO (-1)
118 * The starting number for dynamically-assigned entries. WARNING!
119 * ALL static sysctl entries should have numbers LESS than this!
121 #define CTL_AUTO_START 0x100
124 #include <sys/linker_set.h>
126 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, \
127 intptr_t arg2, struct sysctl_req *req
129 /* definitions for sysctl_req 'lock' member */
130 #define REQ_UNWIRED 1
133 /* definitions for sysctl_req 'flags' member */
134 #if defined(__amd64__) || defined(__powerpc64__) ||\
135 (defined(__mips__) && defined(__mips_n64))
136 #define SCTL_MASK32 1 /* 32 bit emulation */
140 * This describes the access space for a sysctl request. This is needed
141 * so that we can use the interface from the kernel or from user-space.
144 struct thread *td; /* used for access checking */
145 int lock; /* wiring state */
149 int (*oldfunc)(struct sysctl_req *, const void *, size_t);
153 int (*newfunc)(struct sysctl_req *, void *, size_t);
158 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
161 * This describes one "oid" in the MIB tree. Potentially more nodes can
162 * be hidden behind it, expanded by the handler.
165 struct sysctl_oid_list oid_children;
166 struct sysctl_oid_list *oid_parent;
167 SLIST_ENTRY(sysctl_oid) oid_link;
172 const char *oid_name;
173 int (*oid_handler)(SYSCTL_HANDLER_ARGS);
177 const char *oid_descr;
180 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
181 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
183 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
184 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
185 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
186 int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
187 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
188 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
189 int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS);
191 int sysctl_handle_uma_zone_max(SYSCTL_HANDLER_ARGS);
192 int sysctl_handle_uma_zone_cur(SYSCTL_HANDLER_ARGS);
194 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
195 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
196 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS);
199 * These functions are used to add/remove an oid from the mib.
201 void sysctl_register_oid(struct sysctl_oid *oidp);
202 void sysctl_unregister_oid(struct sysctl_oid *oidp);
204 /* Declare a static oid to allow child oids to be added to it. */
205 #define SYSCTL_DECL(name) \
206 extern struct sysctl_oid sysctl__##name
208 /* Hide these in macros. */
209 #define SYSCTL_CHILDREN(oid_ptr) (&(oid_ptr)->oid_children)
210 #define SYSCTL_PARENT(oid_ptr) \
211 (((oid_ptr)->oid_parent != &sysctl__children) ? \
212 __containerof((oid_ptr)->oid_parent, struct sysctl_oid, \
213 oid_children) : (struct sysctl_oid *)NULL)
214 #define SYSCTL_STATIC_CHILDREN(oid_name) (&sysctl__##oid_name.oid_children)
216 /* === Structs and macros related to context handling. === */
218 /* All dynamically created sysctls can be tracked in a context list. */
219 struct sysctl_ctx_entry {
220 struct sysctl_oid *entry;
221 TAILQ_ENTRY(sysctl_ctx_entry) link;
224 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
226 #define SYSCTL_NODE_CHILDREN(parent, name) \
227 sysctl__##parent##_##name.oid_children
229 #ifndef NO_SYSCTL_DESCR
232 #define __DESCR(d) ""
235 /* This macro is only for internal use */
236 #define SYSCTL_OID_RAW(id, parent_child_head, nbr, name, kind, a1, a2, handler, fmt, descr) \
237 struct sysctl_oid id = { \
238 .oid_parent = (parent_child_head), \
239 .oid_children = SLIST_HEAD_INITIALIZER(&id.oid_children), \
240 .oid_number = (nbr), \
241 .oid_kind = (kind), \
244 .oid_name = (name), \
245 .oid_handler = (handler), \
247 .oid_descr = __DESCR(descr) \
249 DATA_SET(sysctl_set, id)
251 /* This constructs a static "raw" MIB oid. */
252 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
253 static SYSCTL_OID_RAW(sysctl__##parent##_##name, \
254 SYSCTL_CHILDREN(&sysctl__##parent), \
255 nbr, #name, kind, a1, a2, handler, fmt, descr)
257 /* This constructs a global "raw" MIB oid. */
258 #define SYSCTL_OID_GLOBAL(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
259 SYSCTL_OID_RAW(sysctl__##parent##_##name, \
260 SYSCTL_CHILDREN(&sysctl__##parent), \
261 nbr, #name, kind, a1, a2, handler, fmt, descr)
263 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
264 sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
266 /* This constructs a root node from which other nodes can hang. */
267 #define SYSCTL_ROOT_NODE(nbr, name, access, handler, descr) \
268 SYSCTL_OID_RAW(sysctl___##name, &sysctl__children, \
269 nbr, #name, CTLTYPE_NODE|(access), NULL, 0, \
270 handler, "N", descr); \
271 CTASSERT(((access) & CTLTYPE) == 0)
273 /* This constructs a node from which other oids can hang. */
274 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr) \
275 SYSCTL_OID_GLOBAL(parent, nbr, name, CTLTYPE_NODE|(access), \
276 NULL, 0, handler, "N", descr); \
277 CTASSERT(((access) & CTLTYPE) == 0)
279 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \
281 CTASSERT(((access) & CTLTYPE) == 0); \
282 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access), \
283 NULL, 0, handler, "N", __DESCR(descr)); \
286 #define SYSCTL_ADD_ROOT_NODE(ctx, nbr, name, access, handler, descr) \
288 CTASSERT(((access) & CTLTYPE) == 0); \
289 sysctl_add_oid(ctx, &sysctl__children, nbr, name, \
290 CTLTYPE_NODE|(access), \
291 NULL, 0, handler, "N", __DESCR(descr)); \
294 /* Oid for a string. len can be 0 to indicate '\0' termination. */
295 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
296 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \
297 arg, len, sysctl_handle_string, "A", descr); \
298 CTASSERT(((access) & CTLTYPE) == 0)
300 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \
302 char *__arg = (arg); \
303 CTASSERT(((access) & CTLTYPE) == 0); \
304 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \
305 __arg, len, sysctl_handle_string, "A", __DESCR(descr)); \
308 /* Oid for an int. If ptr is SYSCTL_NULL_INT_PTR, val is returned. */
309 #define SYSCTL_NULL_INT_PTR ((int *)NULL)
310 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
311 SYSCTL_OID(parent, nbr, name, \
312 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
313 ptr, val, sysctl_handle_int, "I", descr); \
314 CTASSERT(((access) & CTLTYPE) == 0); \
315 CTASSERT(sizeof(int) == sizeof(*(ptr)))
317 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \
319 int *__ptr = (ptr); \
320 CTASSERT(((access) & CTLTYPE) == 0); \
321 sysctl_add_oid(ctx, parent, nbr, name, \
322 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
323 __ptr, val, sysctl_handle_int, "I", __DESCR(descr)); \
326 /* Oid for an unsigned int. If ptr is NULL, val is returned. */
327 #define SYSCTL_NULL_UINT_PTR ((unsigned *)NULL)
328 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
329 SYSCTL_OID(parent, nbr, name, \
330 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \
331 ptr, val, sysctl_handle_int, "IU", descr); \
332 CTASSERT(((access) & CTLTYPE) == 0); \
333 CTASSERT(sizeof(unsigned) == sizeof(*(ptr)))
335 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \
337 unsigned *__ptr = (ptr); \
338 CTASSERT(((access) & CTLTYPE) == 0); \
339 sysctl_add_oid(ctx, parent, nbr, name, \
340 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \
341 __ptr, val, sysctl_handle_int, "IU", __DESCR(descr)); \
344 /* Oid for a long. The pointer must be non NULL. */
345 #define SYSCTL_NULL_LONG_PTR ((long *)NULL)
346 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
347 SYSCTL_OID(parent, nbr, name, \
348 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \
349 ptr, val, sysctl_handle_long, "L", descr); \
350 CTASSERT(((access) & CTLTYPE) == 0); \
351 CTASSERT(sizeof(long) == sizeof(*(ptr)))
353 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr) \
355 long *__ptr = (ptr); \
356 CTASSERT(((access) & CTLTYPE) == 0); \
357 sysctl_add_oid(ctx, parent, nbr, name, \
358 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \
359 __ptr, 0, sysctl_handle_long, "L", __DESCR(descr)); \
362 /* Oid for an unsigned long. The pointer must be non NULL. */
363 #define SYSCTL_NULL_ULONG_PTR ((unsigned long *)NULL)
364 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
365 SYSCTL_OID(parent, nbr, name, \
366 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \
367 ptr, val, sysctl_handle_long, "LU", descr); \
368 CTASSERT(((access) & CTLTYPE) == 0); \
369 CTASSERT(sizeof(unsigned long) == sizeof(*(ptr)))
371 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr) \
373 unsigned long *__ptr = (ptr); \
374 CTASSERT(((access) & CTLTYPE) == 0); \
375 sysctl_add_oid(ctx, parent, nbr, name, \
376 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \
377 __ptr, 0, sysctl_handle_long, "LU", __DESCR(descr)); \
380 /* Oid for a quad. The pointer must be non NULL. */
381 #define SYSCTL_NULL_QUAD_PTR ((int64_t *)NULL)
382 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \
383 SYSCTL_OID(parent, nbr, name, \
384 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \
385 ptr, val, sysctl_handle_64, "Q", descr); \
386 CTASSERT(((access) & CTLTYPE) == 0); \
387 CTASSERT(sizeof(int64_t) == sizeof(*(ptr)))
389 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr) \
391 int64_t *__ptr = (ptr); \
392 CTASSERT(((access) & CTLTYPE) == 0); \
393 sysctl_add_oid(ctx, parent, nbr, name, \
394 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \
395 __ptr, 0, sysctl_handle_64, "Q", __DESCR(descr)); \
398 #define SYSCTL_NULL_UQUAD_PTR ((uint64_t *)NULL)
399 #define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr) \
400 SYSCTL_OID(parent, nbr, name, \
401 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
402 ptr, val, sysctl_handle_64, "QU", descr); \
403 CTASSERT(((access) & CTLTYPE) == 0); \
404 CTASSERT(sizeof(uint64_t) == sizeof(*(ptr)))
406 #define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr) \
408 uint64_t *__ptr = (ptr); \
409 CTASSERT(((access) & CTLTYPE) == 0); \
410 sysctl_add_oid(ctx, parent, nbr, name, \
411 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
412 __ptr, 0, sysctl_handle_64, "QU", __DESCR(descr)); \
415 /* Oid for a CPU dependant variable */
416 #define SYSCTL_ADD_UAUTO(ctx, parent, nbr, name, access, ptr, descr) \
418 struct sysctl_oid *__ret; \
419 CTASSERT(sizeof(uint64_t) == sizeof(*(ptr)) || \
420 sizeof(unsigned) == sizeof(*(ptr))); \
421 CTASSERT(((access) & CTLTYPE) == 0); \
422 if (sizeof(uint64_t) == sizeof(*(ptr))) { \
423 __ret = sysctl_add_oid(ctx, parent, nbr, name, \
424 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
425 (ptr), 0, sysctl_handle_64, "QU", \
428 __ret = sysctl_add_oid(ctx, parent, nbr, name, \
429 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \
430 (ptr), 0, sysctl_handle_int, "IU", \
436 /* Oid for a 64-bit unsigned counter(9). The pointer must be non NULL. */
437 #define SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, descr) \
438 SYSCTL_OID(parent, nbr, name, \
439 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
440 (ptr), 0, sysctl_handle_counter_u64, "QU", descr); \
441 CTASSERT(((access) & CTLTYPE) == 0); \
442 CTASSERT(sizeof(counter_u64_t) == sizeof(*(ptr))); \
443 CTASSERT(sizeof(uint64_t) == sizeof(**(ptr)))
445 #define SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr) \
447 counter_u64_t *__ptr = (ptr); \
448 CTASSERT(((access) & CTLTYPE) == 0); \
449 sysctl_add_oid(ctx, parent, nbr, name, \
450 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
451 __ptr, 0, sysctl_handle_counter_u64, "QU", __DESCR(descr)); \
454 /* Oid for an opaque object. Specified by a pointer and a length. */
455 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
456 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
457 ptr, len, sysctl_handle_opaque, fmt, descr); \
458 CTASSERT(((access) & CTLTYPE) == 0)
460 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr) \
462 CTASSERT(((access) & CTLTYPE) == 0); \
463 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
464 ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr)); \
467 /* Oid for a struct. Specified by a pointer and a type. */
468 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
469 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
470 ptr, sizeof(struct type), sysctl_handle_opaque, \
471 "S," #type, descr); \
472 CTASSERT(((access) & CTLTYPE) == 0)
474 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
476 CTASSERT(((access) & CTLTYPE) == 0); \
477 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
478 (ptr), sizeof(struct type), \
479 sysctl_handle_opaque, "S," #type, __DESCR(descr)); \
482 /* Oid for a procedure. Specified by a pointer and an arg. */
483 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
484 SYSCTL_OID(parent, nbr, name, (access), \
485 ptr, arg, handler, fmt, descr); \
486 CTASSERT(((access) & CTLTYPE) != 0)
488 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
490 CTASSERT(((access) & CTLTYPE) != 0); \
491 sysctl_add_oid(ctx, parent, nbr, name, (access), \
492 (ptr), (arg), (handler), (fmt), __DESCR(descr)); \
495 /* Oid to handle limits on uma(9) zone specified by pointer. */
496 #define SYSCTL_UMA_MAX(parent, nbr, name, access, ptr, descr) \
497 SYSCTL_OID(parent, nbr, name, \
498 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
499 (ptr), 0, sysctl_handle_uma_zone_max, "I", descr); \
500 CTASSERT(((access) & CTLTYPE) == 0)
502 #define SYSCTL_ADD_UMA_MAX(ctx, parent, nbr, name, access, ptr, descr) \
504 uma_zone_t __ptr = (ptr); \
505 CTASSERT(((access) & CTLTYPE) == 0); \
506 sysctl_add_oid(ctx, parent, nbr, name, \
507 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
508 __ptr, 0, sysctl_handle_uma_zone_max, "I", __DESCR(descr)); \
511 /* Oid to obtain current use of uma(9) zone specified by pointer. */
512 #define SYSCTL_UMA_CUR(parent, nbr, name, access, ptr, descr) \
513 SYSCTL_OID(parent, nbr, name, \
514 CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access), \
515 (ptr), 0, sysctl_handle_uma_zone_cur, "I", descr); \
516 CTASSERT(((access) & CTLTYPE) == 0)
518 #define SYSCTL_ADD_UMA_CUR(ctx, parent, nbr, name, access, ptr, descr) \
520 uma_zone_t __ptr = (ptr); \
521 CTASSERT(((access) & CTLTYPE) == 0); \
522 sysctl_add_oid(ctx, parent, nbr, name, \
523 CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access), \
524 __ptr, 0, sysctl_handle_uma_zone_cur, "I", __DESCR(descr)); \
528 * A macro to generate a read-only sysctl to indicate the presense of optional
531 #define FEATURE(name, desc) \
532 SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
533 SYSCTL_NULL_INT_PTR, 1, desc)
538 * Top-level identifiers
540 #define CTL_UNSPEC 0 /* unused */
541 #define CTL_KERN 1 /* "high kernel": proc, limits */
542 #define CTL_VM 2 /* virtual memory */
543 #define CTL_VFS 3 /* filesystem, mount type is next */
544 #define CTL_NET 4 /* network, see socket.h */
545 #define CTL_DEBUG 5 /* debugging parameters */
546 #define CTL_HW 6 /* generic cpu/io */
547 #define CTL_MACHDEP 7 /* machine dependent */
548 #define CTL_USER 8 /* user-level */
549 #define CTL_P1003_1B 9 /* POSIX 1003.1B */
552 * CTL_KERN identifiers
554 #define KERN_OSTYPE 1 /* string: system version */
555 #define KERN_OSRELEASE 2 /* string: system release */
556 #define KERN_OSREV 3 /* int: system revision */
557 #define KERN_VERSION 4 /* string: compile time info */
558 #define KERN_MAXVNODES 5 /* int: max vnodes */
559 #define KERN_MAXPROC 6 /* int: max processes */
560 #define KERN_MAXFILES 7 /* int: max open files */
561 #define KERN_ARGMAX 8 /* int: max arguments to exec */
562 #define KERN_SECURELVL 9 /* int: system security level */
563 #define KERN_HOSTNAME 10 /* string: hostname */
564 #define KERN_HOSTID 11 /* int: host identifier */
565 #define KERN_CLOCKRATE 12 /* struct: struct clockrate */
566 #define KERN_VNODE 13 /* struct: vnode structures */
567 #define KERN_PROC 14 /* struct: process entries */
568 #define KERN_FILE 15 /* struct: file entries */
569 #define KERN_PROF 16 /* node: kernel profiling info */
570 #define KERN_POSIX1 17 /* int: POSIX.1 version */
571 #define KERN_NGROUPS 18 /* int: # of supplemental group ids */
572 #define KERN_JOB_CONTROL 19 /* int: is job control available */
573 #define KERN_SAVED_IDS 20 /* int: saved set-user/group-ID */
574 #define KERN_BOOTTIME 21 /* struct: time kernel was booted */
575 #define KERN_NISDOMAINNAME 22 /* string: YP domain name */
576 #define KERN_UPDATEINTERVAL 23 /* int: update process sleep time */
577 #define KERN_OSRELDATE 24 /* int: kernel release date */
578 #define KERN_NTP_PLL 25 /* node: NTP PLL control */
579 #define KERN_BOOTFILE 26 /* string: name of booted kernel */
580 #define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */
581 #define KERN_MAXPROCPERUID 28 /* int: max processes per uid */
582 #define KERN_DUMPDEV 29 /* struct cdev *: device to dump on */
583 #define KERN_IPC 30 /* node: anything related to IPC */
584 #define KERN_DUMMY 31 /* unused */
585 #define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */
586 #define KERN_USRSTACK 33 /* int: address of USRSTACK */
587 #define KERN_LOGSIGEXIT 34 /* int: do we log sigexit procs? */
588 #define KERN_IOV_MAX 35 /* int: value of UIO_MAXIOV */
589 #define KERN_HOSTUUID 36 /* string: host UUID identifier */
590 #define KERN_ARND 37 /* int: from arc4rand() */
594 #define KERN_PROC_ALL 0 /* everything */
595 #define KERN_PROC_PID 1 /* by process id */
596 #define KERN_PROC_PGRP 2 /* by process group id */
597 #define KERN_PROC_SESSION 3 /* by session of pid */
598 #define KERN_PROC_TTY 4 /* by controlling tty */
599 #define KERN_PROC_UID 5 /* by effective uid */
600 #define KERN_PROC_RUID 6 /* by real uid */
601 #define KERN_PROC_ARGS 7 /* get/set arguments/proctitle */
602 #define KERN_PROC_PROC 8 /* only return procs */
603 #define KERN_PROC_SV_NAME 9 /* get syscall vector name */
604 #define KERN_PROC_RGID 10 /* by real group id */
605 #define KERN_PROC_GID 11 /* by effective group id */
606 #define KERN_PROC_PATHNAME 12 /* path to executable */
607 #define KERN_PROC_OVMMAP 13 /* Old VM map entries for process */
608 #define KERN_PROC_OFILEDESC 14 /* Old file descriptors for process */
609 #define KERN_PROC_KSTACK 15 /* Kernel stacks for process */
610 #define KERN_PROC_INC_THREAD 0x10 /*
611 * modifier for pid, pgrp, tty,
612 * uid, ruid, gid, rgid and proc
613 * This effectively uses 16-31
615 #define KERN_PROC_VMMAP 32 /* VM map entries for process */
616 #define KERN_PROC_FILEDESC 33 /* File descriptors for process */
617 #define KERN_PROC_GROUPS 34 /* process groups */
618 #define KERN_PROC_ENV 35 /* get environment */
619 #define KERN_PROC_AUXV 36 /* get ELF auxiliary vector */
620 #define KERN_PROC_RLIMIT 37 /* process resource limits */
621 #define KERN_PROC_PS_STRINGS 38 /* get ps_strings location */
622 #define KERN_PROC_UMASK 39 /* process umask */
623 #define KERN_PROC_OSREL 40 /* osreldate for process binary */
624 #define KERN_PROC_SIGTRAMP 41 /* signal trampoline location */
627 * KERN_IPC identifiers
629 #define KIPC_MAXSOCKBUF 1 /* int: max size of a socket buffer */
630 #define KIPC_SOCKBUF_WASTE 2 /* int: wastage factor in sockbuf */
631 #define KIPC_SOMAXCONN 3 /* int: max length of connection q */
632 #define KIPC_MAX_LINKHDR 4 /* int: max length of link header */
633 #define KIPC_MAX_PROTOHDR 5 /* int: max length of network header */
634 #define KIPC_MAX_HDR 6 /* int: max total length of headers */
635 #define KIPC_MAX_DATALEN 7 /* int: max length of data? */
640 #define HW_MACHINE 1 /* string: machine class */
641 #define HW_MODEL 2 /* string: specific machine model */
642 #define HW_NCPU 3 /* int: number of cpus */
643 #define HW_BYTEORDER 4 /* int: machine byte order */
644 #define HW_PHYSMEM 5 /* int: total memory */
645 #define HW_USERMEM 6 /* int: non-kernel memory */
646 #define HW_PAGESIZE 7 /* int: software page size */
647 #define HW_DISKNAMES 8 /* strings: disk drive names */
648 #define HW_DISKSTATS 9 /* struct: diskstats[] */
649 #define HW_FLOATINGPT 10 /* int: has HW floating point? */
650 #define HW_MACHINE_ARCH 11 /* string: machine architecture */
651 #define HW_REALMEM 12 /* int: 'real' memory */
654 * CTL_USER definitions
656 #define USER_CS_PATH 1 /* string: _CS_PATH */
657 #define USER_BC_BASE_MAX 2 /* int: BC_BASE_MAX */
658 #define USER_BC_DIM_MAX 3 /* int: BC_DIM_MAX */
659 #define USER_BC_SCALE_MAX 4 /* int: BC_SCALE_MAX */
660 #define USER_BC_STRING_MAX 5 /* int: BC_STRING_MAX */
661 #define USER_COLL_WEIGHTS_MAX 6 /* int: COLL_WEIGHTS_MAX */
662 #define USER_EXPR_NEST_MAX 7 /* int: EXPR_NEST_MAX */
663 #define USER_LINE_MAX 8 /* int: LINE_MAX */
664 #define USER_RE_DUP_MAX 9 /* int: RE_DUP_MAX */
665 #define USER_POSIX2_VERSION 10 /* int: POSIX2_VERSION */
666 #define USER_POSIX2_C_BIND 11 /* int: POSIX2_C_BIND */
667 #define USER_POSIX2_C_DEV 12 /* int: POSIX2_C_DEV */
668 #define USER_POSIX2_CHAR_TERM 13 /* int: POSIX2_CHAR_TERM */
669 #define USER_POSIX2_FORT_DEV 14 /* int: POSIX2_FORT_DEV */
670 #define USER_POSIX2_FORT_RUN 15 /* int: POSIX2_FORT_RUN */
671 #define USER_POSIX2_LOCALEDEF 16 /* int: POSIX2_LOCALEDEF */
672 #define USER_POSIX2_SW_DEV 17 /* int: POSIX2_SW_DEV */
673 #define USER_POSIX2_UPE 18 /* int: POSIX2_UPE */
674 #define USER_STREAM_MAX 19 /* int: POSIX2_STREAM_MAX */
675 #define USER_TZNAME_MAX 20 /* int: POSIX2_TZNAME_MAX */
677 #define CTL_P1003_1B_ASYNCHRONOUS_IO 1 /* boolean */
678 #define CTL_P1003_1B_MAPPED_FILES 2 /* boolean */
679 #define CTL_P1003_1B_MEMLOCK 3 /* boolean */
680 #define CTL_P1003_1B_MEMLOCK_RANGE 4 /* boolean */
681 #define CTL_P1003_1B_MEMORY_PROTECTION 5 /* boolean */
682 #define CTL_P1003_1B_MESSAGE_PASSING 6 /* boolean */
683 #define CTL_P1003_1B_PRIORITIZED_IO 7 /* boolean */
684 #define CTL_P1003_1B_PRIORITY_SCHEDULING 8 /* boolean */
685 #define CTL_P1003_1B_REALTIME_SIGNALS 9 /* boolean */
686 #define CTL_P1003_1B_SEMAPHORES 10 /* boolean */
687 #define CTL_P1003_1B_FSYNC 11 /* boolean */
688 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS 12 /* boolean */
689 #define CTL_P1003_1B_SYNCHRONIZED_IO 13 /* boolean */
690 #define CTL_P1003_1B_TIMERS 14 /* boolean */
691 #define CTL_P1003_1B_AIO_LISTIO_MAX 15 /* int */
692 #define CTL_P1003_1B_AIO_MAX 16 /* int */
693 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX 17 /* int */
694 #define CTL_P1003_1B_DELAYTIMER_MAX 18 /* int */
695 #define CTL_P1003_1B_MQ_OPEN_MAX 19 /* int */
696 #define CTL_P1003_1B_PAGESIZE 20 /* int */
697 #define CTL_P1003_1B_RTSIG_MAX 21 /* int */
698 #define CTL_P1003_1B_SEM_NSEMS_MAX 22 /* int */
699 #define CTL_P1003_1B_SEM_VALUE_MAX 23 /* int */
700 #define CTL_P1003_1B_SIGQUEUE_MAX 24 /* int */
701 #define CTL_P1003_1B_TIMER_MAX 25 /* int */
703 #define CTL_P1003_1B_MAXID 26
708 * Declare some common oids.
710 extern struct sysctl_oid_list sysctl__children;
712 SYSCTL_DECL(_kern_features);
713 SYSCTL_DECL(_kern_ipc);
714 SYSCTL_DECL(_kern_proc);
715 SYSCTL_DECL(_kern_sched);
716 SYSCTL_DECL(_kern_sched_stats);
717 SYSCTL_DECL(_sysctl);
719 SYSCTL_DECL(_vm_stats);
720 SYSCTL_DECL(_vm_stats_misc);
724 SYSCTL_DECL(_debug_sizeof);
727 SYSCTL_DECL(_hw_bus);
728 SYSCTL_DECL(_hw_bus_devices);
729 SYSCTL_DECL(_hw_bus_info);
730 SYSCTL_DECL(_machdep);
732 SYSCTL_DECL(_compat);
733 SYSCTL_DECL(_regression);
734 SYSCTL_DECL(_security);
735 SYSCTL_DECL(_security_bsd);
737 extern char machine[];
738 extern char osrelease[];
739 extern char ostype[];
740 extern char kern_ident[];
742 /* Dynamic oid handling */
743 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
744 struct sysctl_oid_list *parent, int nbr, const char *name, int kind,
745 void *arg1, intptr_t arg2, int (*handler)(SYSCTL_HANDLER_ARGS),
746 const char *fmt, const char *descr);
747 int sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del,
749 void sysctl_rename_oid(struct sysctl_oid *oidp, const char *name);
750 int sysctl_move_oid(struct sysctl_oid *oidp,
751 struct sysctl_oid_list *parent);
752 int sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
753 int sysctl_ctx_init(struct sysctl_ctx_list *clist);
754 int sysctl_ctx_free(struct sysctl_ctx_list *clist);
755 struct sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
756 struct sysctl_oid *oidp);
757 struct sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
758 struct sysctl_oid *oidp);
759 int sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
760 struct sysctl_oid *oidp);
762 int kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
763 size_t *oldlenp, void *new, size_t newlen, size_t *retval,
765 int kernel_sysctlbyname(struct thread *td, char *name, void *old,
766 size_t *oldlenp, void *new, size_t newlen, size_t *retval,
768 int userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
769 size_t *oldlenp, int inkernel, void *new, size_t newlen,
770 size_t *retval, int flags);
771 int sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
772 int *nindx, struct sysctl_req *req);
773 void sysctl_xlock(void);
774 void sysctl_xunlock(void);
775 int sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
778 struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int,
779 struct sysctl_req *);
781 #include <sys/cdefs.h>
784 int sysctl(const int *, u_int, void *, size_t *, const void *, size_t);
785 int sysctlbyname(const char *, void *, size_t *, const void *, size_t);
786 int sysctlnametomib(const char *, int *, size_t *);
790 #endif /* !_SYS_SYSCTL_H_ */