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 /* Tunable variable */
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>
127 /* XXX allow overspecification of type in external kernel modules */
128 #define SYSCTL_CT_ASSERT_MASK CTLTYPE
130 #define SYSCTL_CT_ASSERT_MASK 0
133 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, \
134 intptr_t arg2, struct sysctl_req *req
136 /* definitions for sysctl_req 'lock' member */
137 #define REQ_UNWIRED 1
140 /* definitions for sysctl_req 'flags' member */
141 #if defined(__amd64__) || defined(__ia64__) || defined(__powerpc64__) ||\
142 (defined(__mips__) && defined(__mips_n64))
143 #define SCTL_MASK32 1 /* 32 bit emulation */
147 * This describes the access space for a sysctl request. This is needed
148 * so that we can use the interface from the kernel or from user-space.
151 struct thread *td; /* used for access checking */
152 int lock; /* wiring state */
156 int (*oldfunc)(struct sysctl_req *, const void *, size_t);
160 int (*newfunc)(struct sysctl_req *, void *, size_t);
165 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
168 * This describes one "oid" in the MIB tree. Potentially more nodes can
169 * be hidden behind it, expanded by the handler.
172 struct sysctl_oid_list *oid_parent;
173 SLIST_ENTRY(sysctl_oid) oid_link;
178 const char *oid_name;
179 int (*oid_handler)(SYSCTL_HANDLER_ARGS);
183 const char *oid_descr;
186 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
187 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
189 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
190 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
191 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
192 int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
193 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
194 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
195 int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS);
197 int sysctl_handle_uma_zone_max(SYSCTL_HANDLER_ARGS);
198 int sysctl_handle_uma_zone_cur(SYSCTL_HANDLER_ARGS);
200 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
201 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
202 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS);
205 * These functions are used to add/remove an oid from the mib.
207 void sysctl_register_oid(struct sysctl_oid *oidp);
208 void sysctl_unregister_oid(struct sysctl_oid *oidp);
210 /* Declare a static oid to allow child oids to be added to it. */
211 #define SYSCTL_DECL(name) \
212 extern struct sysctl_oid_list sysctl_##name##_children
214 /* Hide these in macros. */
215 #define SYSCTL_CHILDREN(oid_ptr) \
216 (struct sysctl_oid_list *)(oid_ptr)->oid_arg1
217 #define SYSCTL_PARENT(oid_ptr) NULL /* not supported */
218 #define SYSCTL_CHILDREN_SET(oid_ptr, val) (oid_ptr)->oid_arg1 = (val)
219 #define SYSCTL_STATIC_CHILDREN(oid_name) (&sysctl_##oid_name##_children)
221 /* === Structs and macros related to context handling. === */
223 /* All dynamically created sysctls can be tracked in a context list. */
224 struct sysctl_ctx_entry {
225 struct sysctl_oid *entry;
226 TAILQ_ENTRY(sysctl_ctx_entry) link;
229 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
231 #define SYSCTL_NODE_CHILDREN(parent, name) \
232 sysctl_##parent##_##name##_children
234 #ifndef NO_SYSCTL_DESCR
237 #define __DESCR(d) ""
240 /* This constructs a "raw" MIB oid. */
241 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr)\
242 static struct sysctl_oid sysctl__##parent##_##name = { \
243 &sysctl_##parent##_children, \
256 DATA_SET(sysctl_set, sysctl__##parent##_##name)
258 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
259 sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
261 /* This constructs a root node from which other nodes can hang. */
262 #define SYSCTL_ROOT_NODE(nbr, name, access, handler, descr) \
263 SYSCTL_NODE(, nbr, name, access, handler, descr); \
264 CTASSERT(((access) & CTLTYPE) == 0 || \
265 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
267 /* This constructs a node from which other oids can hang. */
268 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr) \
269 struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name); \
270 SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access), \
271 (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, "N", descr); \
272 CTASSERT(((access) & CTLTYPE) == 0 || \
273 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
275 #define SYSCTL_ADD_ROOT_NODE(ctx, nbr, name, access, handler, descr) \
276 SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(), nbr, name, access, handler, descr)
278 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \
280 CTASSERT(((access) & CTLTYPE) == 0 || \
281 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE); \
282 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access), \
283 NULL, 0, handler, "N", __DESCR(descr)); \
286 /* Oid for a string. len can be 0 to indicate '\0' termination. */
287 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
288 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \
289 arg, len, sysctl_handle_string, "A", descr); \
290 CTASSERT(((access) & CTLTYPE) == 0 || \
291 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING)
293 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \
295 char *__arg = (arg); \
296 CTASSERT(((access) & CTLTYPE) == 0 || \
297 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING); \
298 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \
299 __arg, len, sysctl_handle_string, "A", __DESCR(descr)); \
302 /* Oid for an int. If ptr is SYSCTL_NULL_INT_PTR, val is returned. */
303 #define SYSCTL_NULL_INT_PTR ((int *)NULL)
304 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
305 SYSCTL_OID(parent, nbr, name, \
306 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
307 ptr, val, sysctl_handle_int, "I", descr); \
308 CTASSERT(((access) & CTLTYPE) == 0 || \
309 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT); \
310 CTASSERT(sizeof(int) == sizeof(*(ptr)))
312 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \
314 int *__ptr = (ptr); \
315 CTASSERT(((access) & CTLTYPE) == 0 || \
316 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT); \
317 sysctl_add_oid(ctx, parent, nbr, name, \
318 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
319 __ptr, val, sysctl_handle_int, "I", __DESCR(descr)); \
322 /* Oid for an unsigned int. If ptr is NULL, val is returned. */
323 #define SYSCTL_NULL_UINT_PTR ((unsigned *)NULL)
324 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
325 SYSCTL_OID(parent, nbr, name, \
326 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \
327 ptr, val, sysctl_handle_int, "IU", descr); \
328 CTASSERT(((access) & CTLTYPE) == 0 || \
329 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT);\
330 CTASSERT(sizeof(unsigned) == sizeof(*(ptr)))
332 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \
334 unsigned *__ptr = (ptr); \
335 CTASSERT(((access) & CTLTYPE) == 0 || \
336 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT); \
337 sysctl_add_oid(ctx, parent, nbr, name, \
338 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \
339 __ptr, val, sysctl_handle_int, "IU", __DESCR(descr)); \
342 /* Oid for a long. The pointer must be non NULL. */
343 #define SYSCTL_NULL_LONG_PTR ((long *)NULL)
344 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
345 SYSCTL_OID(parent, nbr, name, \
346 CTLTYPE_LONG | CTLFLAG_MPSAFE | (access), \
347 ptr, val, sysctl_handle_long, "L", descr); \
348 CTASSERT(((access) & CTLTYPE) == 0 || \
349 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG);\
350 CTASSERT(sizeof(long) == sizeof(*(ptr)))
352 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr) \
354 long *__ptr = (ptr); \
355 CTASSERT(((access) & CTLTYPE) == 0 || \
356 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG); \
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 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG); \
370 CTASSERT(sizeof(unsigned long) == sizeof(*(ptr)))
372 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr) \
374 unsigned long *__ptr = (ptr); \
375 CTASSERT(((access) & CTLTYPE) == 0 || \
376 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG); \
377 sysctl_add_oid(ctx, parent, nbr, name, \
378 CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access), \
379 __ptr, 0, sysctl_handle_long, "LU", __DESCR(descr)); \
382 /* Oid for a quad. The pointer must be non NULL. */
383 #define SYSCTL_NULL_QUAD_PTR ((int64_t *)NULL)
384 #define SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr) \
385 SYSCTL_OID(parent, nbr, name, \
386 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \
387 ptr, val, sysctl_handle_64, "Q", descr); \
388 CTASSERT(((access) & CTLTYPE) == 0 || \
389 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64); \
390 CTASSERT(sizeof(int64_t) == sizeof(*(ptr)))
392 #define SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr) \
394 int64_t *__ptr = (ptr); \
395 CTASSERT(((access) & CTLTYPE) == 0 || \
396 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64); \
397 sysctl_add_oid(ctx, parent, nbr, name, \
398 CTLTYPE_S64 | CTLFLAG_MPSAFE | (access), \
399 __ptr, 0, sysctl_handle_64, "Q", __DESCR(descr)); \
402 #define SYSCTL_NULL_UQUAD_PTR ((uint64_t *)NULL)
403 #define SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr) \
404 SYSCTL_OID(parent, nbr, name, \
405 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
406 ptr, val, sysctl_handle_64, "QU", descr); \
407 CTASSERT(((access) & CTLTYPE) == 0 || \
408 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64); \
409 CTASSERT(sizeof(uint64_t) == sizeof(*(ptr)))
411 #define SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr) \
413 uint64_t *__ptr = (ptr); \
414 CTASSERT(((access) & CTLTYPE) == 0 || \
415 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64); \
416 sysctl_add_oid(ctx, parent, nbr, name, \
417 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
418 __ptr, 0, sysctl_handle_64, "QU", __DESCR(descr)); \
421 /* Oid for a CPU dependent variable */
422 #define SYSCTL_ADD_UAUTO(ctx, parent, nbr, name, access, ptr, descr) \
424 struct sysctl_oid *__ret; \
425 CTASSERT(sizeof(uint64_t) == sizeof(*(ptr)) || \
426 sizeof(unsigned) == sizeof(*(ptr))); \
427 CTASSERT(((access) & CTLTYPE) == 0); \
428 if (sizeof(uint64_t) == sizeof(*(ptr))) { \
429 __ret = sysctl_add_oid(ctx, parent, nbr, name, \
430 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
431 (ptr), 0, sysctl_handle_64, "QU", \
434 __ret = sysctl_add_oid(ctx, parent, nbr, name, \
435 CTLTYPE_UINT | CTLFLAG_MPSAFE | (access), \
436 (ptr), 0, sysctl_handle_int, "IU", \
442 /* Oid for a 64-bit unsigned counter(9). The pointer must be non NULL. */
443 #define SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, descr) \
444 SYSCTL_OID(parent, nbr, name, \
445 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
446 (ptr), 0, sysctl_handle_counter_u64, "QU", descr); \
447 CTASSERT(((access) & CTLTYPE) == 0 || \
448 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64); \
449 CTASSERT(sizeof(counter_u64_t) == sizeof(*(ptr))); \
450 CTASSERT(sizeof(uint64_t) == sizeof(**(ptr)))
452 #define SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr) \
454 counter_u64_t *__ptr = (ptr); \
455 CTASSERT(((access) & CTLTYPE) == 0 || \
456 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64); \
457 sysctl_add_oid(ctx, parent, nbr, name, \
458 CTLTYPE_U64 | CTLFLAG_MPSAFE | (access), \
459 __ptr, 0, sysctl_handle_counter_u64, "QU", __DESCR(descr)); \
462 /* Oid for an opaque object. Specified by a pointer and a length. */
463 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
464 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
465 ptr, len, sysctl_handle_opaque, fmt, descr); \
466 CTASSERT(((access) & CTLTYPE) == 0 || \
467 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
469 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr) \
471 CTASSERT(((access) & CTLTYPE) == 0 || \
472 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE); \
473 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
474 ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr)); \
477 /* Oid for a struct. Specified by a pointer and a type. */
478 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
479 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
480 ptr, sizeof(struct type), sysctl_handle_opaque, \
481 "S," #type, descr); \
482 CTASSERT(((access) & CTLTYPE) == 0 || \
483 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
485 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
487 CTASSERT(((access) & CTLTYPE) == 0 || \
488 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE); \
489 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
490 (ptr), sizeof(struct type), \
491 sysctl_handle_opaque, "S," #type, __DESCR(descr)); \
494 /* Oid for a procedure. Specified by a pointer and an arg. */
495 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
496 SYSCTL_OID(parent, nbr, name, (access), \
497 ptr, arg, handler, fmt, descr); \
498 CTASSERT(((access) & CTLTYPE) != 0)
500 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
502 CTASSERT(((access) & CTLTYPE) != 0); \
503 sysctl_add_oid(ctx, parent, nbr, name, (access), \
504 (ptr), (arg), (handler), (fmt), __DESCR(descr)); \
507 /* Oid to handle limits on uma(9) zone specified by pointer. */
508 #define SYSCTL_UMA_MAX(parent, nbr, name, access, ptr, descr) \
509 SYSCTL_OID(parent, nbr, name, \
510 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
511 (ptr), 0, sysctl_handle_uma_zone_max, "I", descr); \
512 CTASSERT(((access) & CTLTYPE) == 0 || \
513 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
515 #define SYSCTL_ADD_UMA_MAX(ctx, parent, nbr, name, access, ptr, descr) \
517 uma_zone_t __ptr = (ptr); \
518 CTASSERT(((access) & CTLTYPE) == 0 || \
519 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT); \
520 sysctl_add_oid(ctx, parent, nbr, name, \
521 CTLTYPE_INT | CTLFLAG_MPSAFE | (access), \
522 __ptr, 0, sysctl_handle_uma_zone_max, "I", __DESCR(descr)); \
525 /* Oid to obtain current use of uma(9) zone specified by pointer. */
526 #define SYSCTL_UMA_CUR(parent, nbr, name, access, ptr, descr) \
527 SYSCTL_OID(parent, nbr, name, \
528 CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access), \
529 (ptr), 0, sysctl_handle_uma_zone_cur, "I", descr); \
530 CTASSERT(((access) & CTLTYPE) == 0 || \
531 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
533 #define SYSCTL_ADD_UMA_CUR(ctx, parent, nbr, name, access, ptr, descr) \
535 uma_zone_t __ptr = (ptr); \
536 CTASSERT(((access) & CTLTYPE) == 0 || \
537 ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT); \
538 sysctl_add_oid(ctx, parent, nbr, name, \
539 CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access), \
540 __ptr, 0, sysctl_handle_uma_zone_cur, "I", __DESCR(descr)); \
544 * A macro to generate a read-only sysctl to indicate the presence of optional
547 #define FEATURE(name, desc) \
548 SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
549 SYSCTL_NULL_INT_PTR, 1, desc)
554 * Top-level identifiers
556 #define CTL_UNSPEC 0 /* unused */
557 #define CTL_KERN 1 /* "high kernel": proc, limits */
558 #define CTL_VM 2 /* virtual memory */
559 #define CTL_VFS 3 /* filesystem, mount type is next */
560 #define CTL_NET 4 /* network, see socket.h */
561 #define CTL_DEBUG 5 /* debugging parameters */
562 #define CTL_HW 6 /* generic cpu/io */
563 #define CTL_MACHDEP 7 /* machine dependent */
564 #define CTL_USER 8 /* user-level */
565 #define CTL_P1003_1B 9 /* POSIX 1003.1B */
566 #define CTL_MAXID 10 /* number of valid top-level ids */
569 * CTL_KERN identifiers
571 #define KERN_OSTYPE 1 /* string: system version */
572 #define KERN_OSRELEASE 2 /* string: system release */
573 #define KERN_OSREV 3 /* int: system revision */
574 #define KERN_VERSION 4 /* string: compile time info */
575 #define KERN_MAXVNODES 5 /* int: max vnodes */
576 #define KERN_MAXPROC 6 /* int: max processes */
577 #define KERN_MAXFILES 7 /* int: max open files */
578 #define KERN_ARGMAX 8 /* int: max arguments to exec */
579 #define KERN_SECURELVL 9 /* int: system security level */
580 #define KERN_HOSTNAME 10 /* string: hostname */
581 #define KERN_HOSTID 11 /* int: host identifier */
582 #define KERN_CLOCKRATE 12 /* struct: struct clockrate */
583 #define KERN_VNODE 13 /* struct: vnode structures */
584 #define KERN_PROC 14 /* struct: process entries */
585 #define KERN_FILE 15 /* struct: file entries */
586 #define KERN_PROF 16 /* node: kernel profiling info */
587 #define KERN_POSIX1 17 /* int: POSIX.1 version */
588 #define KERN_NGROUPS 18 /* int: # of supplemental group ids */
589 #define KERN_JOB_CONTROL 19 /* int: is job control available */
590 #define KERN_SAVED_IDS 20 /* int: saved set-user/group-ID */
591 #define KERN_BOOTTIME 21 /* struct: time kernel was booted */
592 #define KERN_NISDOMAINNAME 22 /* string: YP domain name */
593 #define KERN_UPDATEINTERVAL 23 /* int: update process sleep time */
594 #define KERN_OSRELDATE 24 /* int: kernel release date */
595 #define KERN_NTP_PLL 25 /* node: NTP PLL control */
596 #define KERN_BOOTFILE 26 /* string: name of booted kernel */
597 #define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */
598 #define KERN_MAXPROCPERUID 28 /* int: max processes per uid */
599 #define KERN_DUMPDEV 29 /* struct cdev *: device to dump on */
600 #define KERN_IPC 30 /* node: anything related to IPC */
601 #define KERN_DUMMY 31 /* unused */
602 #define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */
603 #define KERN_USRSTACK 33 /* int: address of USRSTACK */
604 #define KERN_LOGSIGEXIT 34 /* int: do we log sigexit procs? */
605 #define KERN_IOV_MAX 35 /* int: value of UIO_MAXIOV */
606 #define KERN_HOSTUUID 36 /* string: host UUID identifier */
607 #define KERN_ARND 37 /* int: from arc4rand() */
608 #define KERN_MAXID 38 /* number of valid kern ids */
612 #define KERN_PROC_ALL 0 /* everything */
613 #define KERN_PROC_PID 1 /* by process id */
614 #define KERN_PROC_PGRP 2 /* by process group id */
615 #define KERN_PROC_SESSION 3 /* by session of pid */
616 #define KERN_PROC_TTY 4 /* by controlling tty */
617 #define KERN_PROC_UID 5 /* by effective uid */
618 #define KERN_PROC_RUID 6 /* by real uid */
619 #define KERN_PROC_ARGS 7 /* get/set arguments/proctitle */
620 #define KERN_PROC_PROC 8 /* only return procs */
621 #define KERN_PROC_SV_NAME 9 /* get syscall vector name */
622 #define KERN_PROC_RGID 10 /* by real group id */
623 #define KERN_PROC_GID 11 /* by effective group id */
624 #define KERN_PROC_PATHNAME 12 /* path to executable */
625 #define KERN_PROC_OVMMAP 13 /* Old VM map entries for process */
626 #define KERN_PROC_OFILEDESC 14 /* Old file descriptors for process */
627 #define KERN_PROC_KSTACK 15 /* Kernel stacks for process */
628 #define KERN_PROC_INC_THREAD 0x10 /*
629 * modifier for pid, pgrp, tty,
630 * uid, ruid, gid, rgid and proc
631 * This effectively uses 16-31
633 #define KERN_PROC_VMMAP 32 /* VM map entries for process */
634 #define KERN_PROC_FILEDESC 33 /* File descriptors for process */
635 #define KERN_PROC_GROUPS 34 /* process groups */
636 #define KERN_PROC_ENV 35 /* get environment */
637 #define KERN_PROC_AUXV 36 /* get ELF auxiliary vector */
638 #define KERN_PROC_RLIMIT 37 /* process resource limits */
639 #define KERN_PROC_PS_STRINGS 38 /* get ps_strings location */
640 #define KERN_PROC_UMASK 39 /* process umask */
641 #define KERN_PROC_OSREL 40 /* osreldate for process binary */
642 #define KERN_PROC_SIGTRAMP 41 /* signal trampoline location */
645 * KERN_IPC identifiers
647 #define KIPC_MAXSOCKBUF 1 /* int: max size of a socket buffer */
648 #define KIPC_SOCKBUF_WASTE 2 /* int: wastage factor in sockbuf */
649 #define KIPC_SOMAXCONN 3 /* int: max length of connection q */
650 #define KIPC_MAX_LINKHDR 4 /* int: max length of link header */
651 #define KIPC_MAX_PROTOHDR 5 /* int: max length of network header */
652 #define KIPC_MAX_HDR 6 /* int: max total length of headers */
653 #define KIPC_MAX_DATALEN 7 /* int: max length of data? */
658 #define HW_MACHINE 1 /* string: machine class */
659 #define HW_MODEL 2 /* string: specific machine model */
660 #define HW_NCPU 3 /* int: number of cpus */
661 #define HW_BYTEORDER 4 /* int: machine byte order */
662 #define HW_PHYSMEM 5 /* int: total memory */
663 #define HW_USERMEM 6 /* int: non-kernel memory */
664 #define HW_PAGESIZE 7 /* int: software page size */
665 #define HW_DISKNAMES 8 /* strings: disk drive names */
666 #define HW_DISKSTATS 9 /* struct: diskstats[] */
667 #define HW_FLOATINGPT 10 /* int: has HW floating point? */
668 #define HW_MACHINE_ARCH 11 /* string: machine architecture */
669 #define HW_REALMEM 12 /* int: 'real' memory */
670 #define HW_MAXID 13 /* number of valid hw ids */
673 * CTL_USER definitions
675 #define USER_CS_PATH 1 /* string: _CS_PATH */
676 #define USER_BC_BASE_MAX 2 /* int: BC_BASE_MAX */
677 #define USER_BC_DIM_MAX 3 /* int: BC_DIM_MAX */
678 #define USER_BC_SCALE_MAX 4 /* int: BC_SCALE_MAX */
679 #define USER_BC_STRING_MAX 5 /* int: BC_STRING_MAX */
680 #define USER_COLL_WEIGHTS_MAX 6 /* int: COLL_WEIGHTS_MAX */
681 #define USER_EXPR_NEST_MAX 7 /* int: EXPR_NEST_MAX */
682 #define USER_LINE_MAX 8 /* int: LINE_MAX */
683 #define USER_RE_DUP_MAX 9 /* int: RE_DUP_MAX */
684 #define USER_POSIX2_VERSION 10 /* int: POSIX2_VERSION */
685 #define USER_POSIX2_C_BIND 11 /* int: POSIX2_C_BIND */
686 #define USER_POSIX2_C_DEV 12 /* int: POSIX2_C_DEV */
687 #define USER_POSIX2_CHAR_TERM 13 /* int: POSIX2_CHAR_TERM */
688 #define USER_POSIX2_FORT_DEV 14 /* int: POSIX2_FORT_DEV */
689 #define USER_POSIX2_FORT_RUN 15 /* int: POSIX2_FORT_RUN */
690 #define USER_POSIX2_LOCALEDEF 16 /* int: POSIX2_LOCALEDEF */
691 #define USER_POSIX2_SW_DEV 17 /* int: POSIX2_SW_DEV */
692 #define USER_POSIX2_UPE 18 /* int: POSIX2_UPE */
693 #define USER_STREAM_MAX 19 /* int: POSIX2_STREAM_MAX */
694 #define USER_TZNAME_MAX 20 /* int: POSIX2_TZNAME_MAX */
695 #define USER_MAXID 21 /* number of valid user ids */
697 #define CTL_P1003_1B_ASYNCHRONOUS_IO 1 /* boolean */
698 #define CTL_P1003_1B_MAPPED_FILES 2 /* boolean */
699 #define CTL_P1003_1B_MEMLOCK 3 /* boolean */
700 #define CTL_P1003_1B_MEMLOCK_RANGE 4 /* boolean */
701 #define CTL_P1003_1B_MEMORY_PROTECTION 5 /* boolean */
702 #define CTL_P1003_1B_MESSAGE_PASSING 6 /* boolean */
703 #define CTL_P1003_1B_PRIORITIZED_IO 7 /* boolean */
704 #define CTL_P1003_1B_PRIORITY_SCHEDULING 8 /* boolean */
705 #define CTL_P1003_1B_REALTIME_SIGNALS 9 /* boolean */
706 #define CTL_P1003_1B_SEMAPHORES 10 /* boolean */
707 #define CTL_P1003_1B_FSYNC 11 /* boolean */
708 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS 12 /* boolean */
709 #define CTL_P1003_1B_SYNCHRONIZED_IO 13 /* boolean */
710 #define CTL_P1003_1B_TIMERS 14 /* boolean */
711 #define CTL_P1003_1B_AIO_LISTIO_MAX 15 /* int */
712 #define CTL_P1003_1B_AIO_MAX 16 /* int */
713 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX 17 /* int */
714 #define CTL_P1003_1B_DELAYTIMER_MAX 18 /* int */
715 #define CTL_P1003_1B_MQ_OPEN_MAX 19 /* int */
716 #define CTL_P1003_1B_PAGESIZE 20 /* int */
717 #define CTL_P1003_1B_RTSIG_MAX 21 /* int */
718 #define CTL_P1003_1B_SEM_NSEMS_MAX 22 /* int */
719 #define CTL_P1003_1B_SEM_VALUE_MAX 23 /* int */
720 #define CTL_P1003_1B_SIGQUEUE_MAX 24 /* int */
721 #define CTL_P1003_1B_TIMER_MAX 25 /* int */
723 #define CTL_P1003_1B_MAXID 26
728 * Declare some common oids.
730 extern struct sysctl_oid_list sysctl__children;
732 SYSCTL_DECL(_kern_features);
733 SYSCTL_DECL(_kern_ipc);
734 SYSCTL_DECL(_kern_proc);
735 SYSCTL_DECL(_kern_sched);
736 SYSCTL_DECL(_kern_sched_stats);
737 SYSCTL_DECL(_sysctl);
739 SYSCTL_DECL(_vm_stats);
740 SYSCTL_DECL(_vm_stats_misc);
744 SYSCTL_DECL(_debug_sizeof);
747 SYSCTL_DECL(_hw_bus);
748 SYSCTL_DECL(_hw_bus_devices);
749 SYSCTL_DECL(_hw_bus_info);
750 SYSCTL_DECL(_machdep);
752 SYSCTL_DECL(_compat);
753 SYSCTL_DECL(_regression);
754 SYSCTL_DECL(_security);
755 SYSCTL_DECL(_security_bsd);
757 extern char machine[];
758 extern char osrelease[];
759 extern char ostype[];
760 extern char kern_ident[];
762 /* Dynamic oid handling */
763 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
764 struct sysctl_oid_list *parent, int nbr, const char *name, int kind,
765 void *arg1, intptr_t arg2, int (*handler)(SYSCTL_HANDLER_ARGS),
766 const char *fmt, const char *descr);
767 int sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del,
769 void sysctl_rename_oid(struct sysctl_oid *oidp, const char *name);
770 int sysctl_move_oid(struct sysctl_oid *oidp,
771 struct sysctl_oid_list *parent);
772 int sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
773 int sysctl_ctx_init(struct sysctl_ctx_list *clist);
774 int sysctl_ctx_free(struct sysctl_ctx_list *clist);
775 struct sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
776 struct sysctl_oid *oidp);
777 struct sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
778 struct sysctl_oid *oidp);
779 int sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
780 struct sysctl_oid *oidp);
782 int kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
783 size_t *oldlenp, void *new, size_t newlen, size_t *retval,
785 int kernel_sysctlbyname(struct thread *td, char *name, void *old,
786 size_t *oldlenp, void *new, size_t newlen, size_t *retval,
788 int userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
789 size_t *oldlenp, int inkernel, void *new, size_t newlen,
790 size_t *retval, int flags);
791 int sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
792 int *nindx, struct sysctl_req *req);
793 void sysctl_lock(void);
794 void sysctl_unlock(void);
795 int sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
798 struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int,
799 struct sysctl_req *);
801 #include <sys/cdefs.h>
804 int sysctl(const int *, u_int, void *, size_t *, const void *, size_t);
805 int sysctlbyname(const char *, void *, size_t *, const void *, size_t);
806 int sysctlnametomib(const char *, int *, size_t *);
810 #endif /* !_SYS_SYSCTL_H_ */