xref: /freebsd/sys/sys/sysctl.h (revision 38a52bd3b5cac3da6f7f6eef3dd050e6aa08ebb3)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1989, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Mike Karels at Berkeley Software Design, Inc.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *	@(#)sysctl.h	8.1 (Berkeley) 6/2/93
35  * $FreeBSD$
36  */
37 
38 #ifndef _SYS_SYSCTL_H_
39 #define	_SYS_SYSCTL_H_
40 
41 #ifdef _KERNEL
42 #include <sys/tree.h>
43 #include <sys/systm.h>
44 #endif
45 
46 /*
47  * Definitions for sysctl call.  The sysctl call uses a hierarchical name
48  * for objects that can be examined or modified.  The name is expressed as
49  * a sequence of integers.  Like a file path name, the meaning of each
50  * component depends on its place in the hierarchy.  The top-level and kern
51  * identifiers are defined here, and other identifiers are defined in the
52  * respective subsystem header files.
53  *
54  * Each subsystem defined by sysctl defines a list of variables for that
55  * subsystem. Each name is either a node with further levels defined below it,
56  * or it is a leaf of some particular type given below. Each sysctl level
57  * defines a set of name/type pairs to be used by sysctl(8) in manipulating the
58  * subsystem.
59  */
60 
61 #define	CTL_MAXNAME	24	/* largest number of components supported */
62 
63 #define	CTLTYPE		0xf	/* mask for the type */
64 #define	CTLTYPE_NODE	1	/* name is a node */
65 #define	CTLTYPE_INT	2	/* name describes an integer */
66 #define	CTLTYPE_STRING	3	/* name describes a string */
67 #define	CTLTYPE_S64	4	/* name describes a signed 64-bit number */
68 #define	CTLTYPE_OPAQUE	5	/* name describes a structure */
69 #define	CTLTYPE_STRUCT	CTLTYPE_OPAQUE	/* name describes a structure */
70 #define	CTLTYPE_UINT	6	/* name describes an unsigned integer */
71 #define	CTLTYPE_LONG	7	/* name describes a long */
72 #define	CTLTYPE_ULONG	8	/* name describes an unsigned long */
73 #define	CTLTYPE_U64	9	/* name describes an unsigned 64-bit number */
74 #define	CTLTYPE_U8	0xa	/* name describes an unsigned 8-bit number */
75 #define	CTLTYPE_U16	0xb	/* name describes an unsigned 16-bit number */
76 #define	CTLTYPE_S8	0xc	/* name describes a signed 8-bit number */
77 #define	CTLTYPE_S16	0xd	/* name describes a signed 16-bit number */
78 #define	CTLTYPE_S32	0xe	/* name describes a signed 32-bit number */
79 #define	CTLTYPE_U32	0xf	/* name describes an unsigned 32-bit number */
80 
81 #define	CTLFLAG_RD	0x80000000	/* Allow reads of variable */
82 #define	CTLFLAG_WR	0x40000000	/* Allow writes to the variable */
83 #define	CTLFLAG_RW	(CTLFLAG_RD|CTLFLAG_WR)
84 #define	CTLFLAG_DORMANT	0x20000000	/* This sysctl is not active yet */
85 #define	CTLFLAG_ANYBODY	0x10000000	/* All users can set this var */
86 #define	CTLFLAG_SECURE	0x08000000	/* Permit set only if securelevel<=0 */
87 #define	CTLFLAG_PRISON	0x04000000	/* Prisoned roots can fiddle */
88 #define	CTLFLAG_DYN	0x02000000	/* Dynamic oid - can be freed */
89 #define	CTLFLAG_SKIP	0x01000000	/* Skip this sysctl when listing */
90 #define	CTLMASK_SECURE	0x00F00000	/* Secure level */
91 #define	CTLFLAG_TUN	0x00080000	/* Default value is loaded from getenv() */
92 #define	CTLFLAG_RDTUN	(CTLFLAG_RD|CTLFLAG_TUN)
93 #define	CTLFLAG_RWTUN	(CTLFLAG_RW|CTLFLAG_TUN)
94 #define	CTLFLAG_MPSAFE	0x00040000	/* Handler is MP safe */
95 #define	CTLFLAG_VNET	0x00020000	/* Prisons with vnet can fiddle */
96 #define	CTLFLAG_DYING	0x00010000	/* Oid is being removed */
97 #define	CTLFLAG_CAPRD	0x00008000	/* Can be read in capability mode */
98 #define	CTLFLAG_CAPWR	0x00004000	/* Can be written in capability mode */
99 #define	CTLFLAG_STATS	0x00002000	/* Statistics, not a tuneable */
100 #define	CTLFLAG_NOFETCH	0x00001000	/* Don't fetch tunable from getenv() */
101 #define	CTLFLAG_CAPRW	(CTLFLAG_CAPRD|CTLFLAG_CAPWR)
102 /*
103  * This is transient flag to be used until all sysctl handlers are converted
104  * to not lock Giant.
105  * One, and only one of CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT is required
106  * for SYSCTL_PROC and SYSCTL_NODE.
107  */
108 #define	CTLFLAG_NEEDGIANT 0x00000800	/* Handler require Giant */
109 
110 /*
111  * Secure level.   Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.
112  *
113  * Secure when the securelevel is raised to at least N.
114  */
115 #define	CTLSHIFT_SECURE	20
116 #define	CTLFLAG_SECURE1	(CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
117 #define	CTLFLAG_SECURE2	(CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
118 #define	CTLFLAG_SECURE3	(CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
119 
120 /*
121  * USE THIS instead of a hardwired number from the categories below
122  * to get dynamically assigned sysctl entries using the linker-set
123  * technology. This is the way nearly all new sysctl variables should
124  * be implemented.
125  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
126  */
127 #define	OID_AUTO	(-1)
128 
129 /*
130  * The starting number for dynamically-assigned entries.  WARNING!
131  * ALL static sysctl entries should have numbers LESS than this!
132  */
133 #define	CTL_AUTO_START	0x100
134 
135 #ifdef _KERNEL
136 #include <sys/linker_set.h>
137 
138 #ifdef KLD_MODULE
139 /* XXX allow overspecification of type in external kernel modules */
140 #define	SYSCTL_CT_ASSERT_MASK CTLTYPE
141 #else
142 #define	SYSCTL_CT_ASSERT_MASK 0
143 #endif
144 
145 #define	SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1,	\
146 	intmax_t arg2, struct sysctl_req *req
147 
148 /* definitions for sysctl_req 'lock' member */
149 #define	REQ_UNWIRED	1
150 #define	REQ_WIRED	2
151 
152 /* definitions for sysctl_req 'flags' member */
153 #ifdef COMPAT_FREEBSD32
154 #define	SCTL_MASK32	1	/* 32 bit emulation */
155 #endif
156 
157 /*
158  * This describes the access space for a sysctl request.  This is needed
159  * so that we can use the interface from the kernel or from user-space.
160  */
161 struct thread;
162 struct sysctl_req {
163 	struct thread	*td;		/* used for access checking */
164 	int		 lock;		/* wiring state */
165 	void		*oldptr;
166 	size_t		 oldlen;
167 	size_t		 oldidx;
168 	int		(*oldfunc)(struct sysctl_req *, const void *, size_t);
169 	const void		*newptr;
170 	size_t		 newlen;
171 	size_t		 newidx;
172 	int		(*newfunc)(struct sysctl_req *, void *, size_t);
173 	size_t		 validlen;
174 	int		 flags;
175 };
176 
177 struct sysctl_oid;
178 
179 /* RB Tree handling */
180 RB_HEAD(sysctl_oid_list, sysctl_oid);
181 
182 /*
183  * This describes one "oid" in the MIB tree.  Potentially more nodes can
184  * be hidden behind it, expanded by the handler.
185  */
186 struct sysctl_oid {
187 	struct sysctl_oid_list	oid_children;
188 	struct sysctl_oid_list*	oid_parent;
189 	RB_ENTRY(sysctl_oid) oid_link;
190 	/* Sort key for all siblings, and lookup key for userland */
191 	int		 oid_number;
192 	u_int		 oid_kind;
193 	void		*oid_arg1;
194 	intmax_t	 oid_arg2;
195 	/* Must be unique amongst all siblings. */
196 	const char	*oid_name;
197 	int		(*oid_handler)(SYSCTL_HANDLER_ARGS);
198 	const char	*oid_fmt;
199 	int		 oid_refcnt;
200 	u_int		 oid_running;
201 	const char	*oid_descr;
202 	const char	*oid_label;
203 };
204 
205 static inline int
206 cmp_sysctl_oid(struct sysctl_oid *a, struct sysctl_oid *b)
207 {
208 	if (a->oid_number > b->oid_number)
209 		return (1);
210 	else if (a->oid_number < b->oid_number)
211 		return (-1);
212 	else
213 		return (0);
214 }
215 
216 RB_PROTOTYPE(sysctl_oid_list, sysctl_oid, oid_link, cmp_sysctl_oid);
217 
218 #define	SYSCTL_IN(r, p, l)	(r->newfunc)(r, p, l)
219 #define	SYSCTL_OUT(r, p, l)	(r->oldfunc)(r, p, l)
220 #define	SYSCTL_OUT_STR(r, p)	(r->oldfunc)(r, p, strlen(p) + 1)
221 
222 int sysctl_handle_bool(SYSCTL_HANDLER_ARGS);
223 int sysctl_handle_8(SYSCTL_HANDLER_ARGS);
224 int sysctl_handle_16(SYSCTL_HANDLER_ARGS);
225 int sysctl_handle_32(SYSCTL_HANDLER_ARGS);
226 int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
227 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
228 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
229 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
230 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
231 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
232 int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS);
233 int sysctl_handle_counter_u64_array(SYSCTL_HANDLER_ARGS);
234 
235 int sysctl_handle_uma_zone_max(SYSCTL_HANDLER_ARGS);
236 int sysctl_handle_uma_zone_cur(SYSCTL_HANDLER_ARGS);
237 
238 int sysctl_msec_to_sbintime(SYSCTL_HANDLER_ARGS);
239 int sysctl_usec_to_sbintime(SYSCTL_HANDLER_ARGS);
240 int sysctl_sec_to_timeval(SYSCTL_HANDLER_ARGS);
241 
242 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
243 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
244 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS);
245 
246 /*
247  * These functions are used to add/remove an oid from the mib.
248  */
249 void sysctl_register_oid(struct sysctl_oid *oidp);
250 void sysctl_register_disabled_oid(struct sysctl_oid *oidp);
251 void sysctl_enable_oid(struct sysctl_oid *oidp);
252 void sysctl_unregister_oid(struct sysctl_oid *oidp);
253 
254 /* Declare a static oid to allow child oids to be added to it. */
255 #define	SYSCTL_DECL(name)			\
256 	extern struct sysctl_oid sysctl__##name
257 
258 /* Hide these in macros. */
259 #define	SYSCTL_CHILDREN(oid_ptr)		(&(oid_ptr)->oid_children)
260 #define	SYSCTL_PARENT(oid_ptr)					\
261     (((oid_ptr)->oid_parent != &sysctl__children) ?		\
262 	__containerof((oid_ptr)->oid_parent, struct sysctl_oid,	\
263 	oid_children) : (struct sysctl_oid *)NULL)
264 #define	SYSCTL_STATIC_CHILDREN(oid_name)	(&sysctl__##oid_name.oid_children)
265 
266 /* === Structs and macros related to context handling. === */
267 
268 /* All dynamically created sysctls can be tracked in a context list. */
269 struct sysctl_ctx_entry {
270 	struct sysctl_oid *entry;
271 	TAILQ_ENTRY(sysctl_ctx_entry) link;
272 };
273 
274 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
275 
276 #define	SYSCTL_NODE_CHILDREN(parent, name) \
277 	sysctl__##parent##_##name.oid_children
278 
279 #ifndef NO_SYSCTL_DESCR
280 #define	__DESCR(d) d
281 #else
282 #define	__DESCR(d) ""
283 #endif
284 
285 #ifdef	notyet
286 #define	SYSCTL_ENFORCE_FLAGS(x)						\
287     _Static_assert((((x) & CTLFLAG_MPSAFE) != 0) ^ (((x) & CTLFLAG_NEEDGIANT) != 0), \
288         "Has to be either CTLFLAG_MPSAFE or CTLFLAG_NEEDGIANT")
289 #else
290 #define	SYSCTL_ENFORCE_FLAGS(x)
291 #endif
292 
293 /* This macro is only for internal use */
294 #define	SYSCTL_OID_RAW(id, parent_child_head, nbr, name, kind, a1, a2, handler, fmt, descr, label) \
295 	struct sysctl_oid id = {					\
296 		.oid_parent = (parent_child_head),			\
297 		.oid_children = RB_INITIALIZER(&id.oid_children), \
298 		.oid_number = (nbr),					\
299 		.oid_kind = (kind),					\
300 		.oid_arg1 = (a1),					\
301 		.oid_arg2 = (a2),					\
302 		.oid_name = (name),					\
303 		.oid_handler = (handler),				\
304 		.oid_fmt = (fmt),					\
305 		.oid_descr = __DESCR(descr),				\
306 		.oid_label = (label),					\
307 	};								\
308 	DATA_SET(sysctl_set, id);					\
309 	SYSCTL_ENFORCE_FLAGS(kind)
310 
311 /* This constructs a static "raw" MIB oid. */
312 #define	SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
313 	SYSCTL_OID_WITH_LABEL(parent, nbr, name, kind, a1, a2,		\
314 	    handler, fmt, descr, NULL)
315 
316 #define	SYSCTL_OID_WITH_LABEL(parent, nbr, name, kind, a1, a2, handler, fmt, descr, label) \
317     static SYSCTL_OID_RAW(sysctl__##parent##_##name,			\
318 	SYSCTL_CHILDREN(&sysctl__##parent),				\
319 	nbr, #name, kind, a1, a2, handler, fmt, descr, label)
320 
321 /* This constructs a global "raw" MIB oid. */
322 #define	SYSCTL_OID_GLOBAL(parent, nbr, name, kind, a1, a2, handler, fmt, descr, label) \
323     SYSCTL_OID_RAW(sysctl__##parent##_##name, \
324 	SYSCTL_CHILDREN(&sysctl__##parent),	\
325 	nbr, #name, kind, a1, a2, handler, fmt, descr, label)
326 
327 #define	SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
328 ({									\
329 	SYSCTL_ENFORCE_FLAGS(kind);					\
330 	sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2,handler,	\
331 	    fmt, __DESCR(descr), NULL);					\
332 })
333 
334 /* This constructs a root node from which other nodes can hang. */
335 #define	SYSCTL_ROOT_NODE(nbr, name, access, handler, descr)	\
336 	SYSCTL_OID_RAW(sysctl___##name, &sysctl__children,	\
337 	    nbr, #name, CTLTYPE_NODE|(access), NULL, 0,		\
338 	    handler, "N", descr, NULL);				\
339 	CTASSERT(((access) & CTLTYPE) == 0 ||			\
340 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
341 
342 /* This constructs a node from which other oids can hang. */
343 #define	SYSCTL_NODE(parent, nbr, name, access, handler, descr) \
344 	SYSCTL_NODE_WITH_LABEL(parent, nbr, name, access, handler, descr, NULL)
345 
346 #define	SYSCTL_NODE_WITH_LABEL(parent, nbr, name, access, handler, descr, label) \
347 	SYSCTL_OID_GLOBAL(parent, nbr, name, CTLTYPE_NODE|(access),	\
348 	    NULL, 0, handler, "N", descr, label);			\
349 	SYSCTL_ENFORCE_FLAGS(access);					\
350 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
351 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
352 
353 #define	SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)	\
354 	SYSCTL_ADD_NODE_WITH_LABEL(ctx, parent, nbr, name, access, \
355 	    handler, descr, NULL)
356 
357 #define	SYSCTL_ADD_NODE_WITH_LABEL(ctx, parent, nbr, name, access, handler, descr, label) \
358 ({									\
359 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
360 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE);	\
361 	SYSCTL_ENFORCE_FLAGS(access);					\
362 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access),	\
363 	    NULL, 0, handler, "N", __DESCR(descr), label);		\
364 })
365 
366 #define	SYSCTL_ADD_ROOT_NODE(ctx, nbr, name, access, handler, descr)	\
367 ({									\
368 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
369 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE);	\
370 	SYSCTL_ENFORCE_FLAGS(access);					\
371 	sysctl_add_oid(ctx, &sysctl__children, nbr, name,		\
372 	    CTLTYPE_NODE|(access),					\
373 	    NULL, 0, handler, "N", __DESCR(descr), NULL);		\
374 })
375 
376 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
377 #define	SYSCTL_STRING(parent, nbr, name, access, arg, len, descr)	\
378 	SYSCTL_OID(parent, nbr, name,					\
379 	    CTLTYPE_STRING | CTLFLAG_MPSAFE | (access),			\
380 	    arg, len, sysctl_handle_string, "A", descr);		\
381 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
382 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING)
383 
384 #define	SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \
385 ({									\
386 	char *__arg = (arg);						\
387 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
388 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING);	\
389 	sysctl_add_oid(ctx, parent, nbr, name,				\
390 	    CTLTYPE_STRING | CTLFLAG_MPSAFE | (access),			\
391 	    __arg, len, sysctl_handle_string, "A", __DESCR(descr),	\
392 	    NULL); \
393 })
394 
395 /* Oid for a constant '\0' terminated string. */
396 #define	SYSCTL_CONST_STRING(parent, nbr, name, access, arg, descr)	\
397 	SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING | CTLFLAG_MPSAFE | (access),\
398 	    __DECONST(char *, arg), 0, sysctl_handle_string, "A", descr); \
399 	CTASSERT(!(access & CTLFLAG_WR));				\
400 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
401 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING)
402 
403 #define	SYSCTL_ADD_CONST_STRING(ctx, parent, nbr, name, access, arg, descr) \
404 ({									\
405 	char *__arg = __DECONST(char *, arg);				\
406 	CTASSERT(!(access & CTLFLAG_WR));				\
407 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
408 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING);	\
409 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING | 	\
410 	    CTLFLAG_MPSAFE | (access), __arg, 0, sysctl_handle_string, "A",\
411 	    __DESCR(descr), NULL); 					\
412 })
413 
414 /* Oid for a bool.  If ptr is NULL, val is returned. */
415 #define	SYSCTL_NULL_BOOL_PTR ((bool *)NULL)
416 #define	SYSCTL_BOOL(parent, nbr, name, access, ptr, val, descr)	\
417 	SYSCTL_OID(parent, nbr, name,				\
418 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),		\
419 	    ptr, val, sysctl_handle_bool, "CU", descr);		\
420 	CTASSERT(((access) & CTLTYPE) == 0 &&			\
421 	    sizeof(bool) == sizeof(*(ptr)))
422 
423 #define	SYSCTL_ADD_BOOL(ctx, parent, nbr, name, access, ptr, val, descr) \
424 ({									\
425 	bool *__ptr = (ptr);						\
426 	CTASSERT(((access) & CTLTYPE) == 0);				\
427 	sysctl_add_oid(ctx, parent, nbr, name,				\
428 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),			\
429 	    __ptr, val, sysctl_handle_bool, "CU", __DESCR(descr),	\
430 	    NULL);							\
431 })
432 
433 /* Oid for a signed 8-bit int.  If ptr is NULL, val is returned. */
434 #define	SYSCTL_NULL_S8_PTR ((int8_t *)NULL)
435 #define	SYSCTL_S8(parent, nbr, name, access, ptr, val, descr)	\
436 	SYSCTL_OID(parent, nbr, name,				\
437 	    CTLTYPE_S8 | CTLFLAG_MPSAFE | (access),		\
438 	    ptr, val, sysctl_handle_8, "C", descr);		\
439 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
440 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S8) && \
441 	    sizeof(int8_t) == sizeof(*(ptr)))
442 
443 #define	SYSCTL_ADD_S8(ctx, parent, nbr, name, access, ptr, val, descr)	\
444 ({									\
445 	int8_t *__ptr = (ptr);						\
446 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
447 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S8);		\
448 	sysctl_add_oid(ctx, parent, nbr, name,				\
449 	    CTLTYPE_S8 | CTLFLAG_MPSAFE | (access),			\
450 	    __ptr, val, sysctl_handle_8, "C", __DESCR(descr), NULL);	\
451 })
452 
453 /* Oid for an unsigned 8-bit int.  If ptr is NULL, val is returned. */
454 #define	SYSCTL_NULL_U8_PTR ((uint8_t *)NULL)
455 #define	SYSCTL_U8(parent, nbr, name, access, ptr, val, descr)	\
456 	SYSCTL_OID(parent, nbr, name,				\
457 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),		\
458 	    ptr, val, sysctl_handle_8, "CU", descr);		\
459 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
460 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U8) && \
461 	    sizeof(uint8_t) == sizeof(*(ptr)))
462 
463 #define	SYSCTL_ADD_U8(ctx, parent, nbr, name, access, ptr, val, descr)	\
464 ({									\
465 	uint8_t *__ptr = (ptr);						\
466 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
467 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U8);		\
468 	sysctl_add_oid(ctx, parent, nbr, name,				\
469 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),			\
470 	    __ptr, val, sysctl_handle_8, "CU", __DESCR(descr), NULL);	\
471 })
472 
473 /* Oid for a signed 16-bit int.  If ptr is NULL, val is returned. */
474 #define	SYSCTL_NULL_S16_PTR ((int16_t *)NULL)
475 #define	SYSCTL_S16(parent, nbr, name, access, ptr, val, descr)	\
476 	SYSCTL_OID(parent, nbr, name,				\
477 	    CTLTYPE_S16 | CTLFLAG_MPSAFE | (access),		\
478 	    ptr, val, sysctl_handle_16, "S", descr);		\
479 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
480 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S16) && \
481 	    sizeof(int16_t) == sizeof(*(ptr)))
482 
483 #define	SYSCTL_ADD_S16(ctx, parent, nbr, name, access, ptr, val, descr)	\
484 ({									\
485 	int16_t *__ptr = (ptr);						\
486 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
487 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S16);		\
488 	sysctl_add_oid(ctx, parent, nbr, name,				\
489 	    CTLTYPE_S16 | CTLFLAG_MPSAFE | (access),			\
490 	    __ptr, val, sysctl_handle_16, "S", __DESCR(descr), NULL);	\
491 })
492 
493 /* Oid for an unsigned 16-bit int.  If ptr is NULL, val is returned. */
494 #define	SYSCTL_NULL_U16_PTR ((uint16_t *)NULL)
495 #define	SYSCTL_U16(parent, nbr, name, access, ptr, val, descr)	\
496 	SYSCTL_OID(parent, nbr, name,				\
497 	    CTLTYPE_U16 | CTLFLAG_MPSAFE | (access),		\
498 	    ptr, val, sysctl_handle_16, "SU", descr);		\
499 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
500 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U16) && \
501 	    sizeof(uint16_t) == sizeof(*(ptr)))
502 
503 #define	SYSCTL_ADD_U16(ctx, parent, nbr, name, access, ptr, val, descr)	\
504 ({									\
505 	uint16_t *__ptr = (ptr);					\
506 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
507 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U16);		\
508 	sysctl_add_oid(ctx, parent, nbr, name,				\
509 	    CTLTYPE_U16 | CTLFLAG_MPSAFE | (access),			\
510 	    __ptr, val, sysctl_handle_16, "SU", __DESCR(descr), NULL);	\
511 })
512 
513 /* Oid for a signed 32-bit int.  If ptr is NULL, val is returned. */
514 #define	SYSCTL_NULL_S32_PTR ((int32_t *)NULL)
515 #define	SYSCTL_S32(parent, nbr, name, access, ptr, val, descr)	\
516 	SYSCTL_OID(parent, nbr, name,				\
517 	    CTLTYPE_S32 | CTLFLAG_MPSAFE | (access),		\
518 	    ptr, val, sysctl_handle_32, "I", descr);		\
519 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
520 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S32) && \
521 	    sizeof(int32_t) == sizeof(*(ptr)))
522 
523 #define	SYSCTL_ADD_S32(ctx, parent, nbr, name, access, ptr, val, descr)	\
524 ({									\
525 	int32_t *__ptr = (ptr);						\
526 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
527 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S32);		\
528 	sysctl_add_oid(ctx, parent, nbr, name,				\
529 	    CTLTYPE_S32 | CTLFLAG_MPSAFE | (access),			\
530 	    __ptr, val, sysctl_handle_32, "I", __DESCR(descr), NULL);	\
531 })
532 
533 /* Oid for an unsigned 32-bit int.  If ptr is NULL, val is returned. */
534 #define	SYSCTL_NULL_U32_PTR ((uint32_t *)NULL)
535 #define	SYSCTL_U32(parent, nbr, name, access, ptr, val, descr)	\
536 	SYSCTL_OID(parent, nbr, name,				\
537 	    CTLTYPE_U32 | CTLFLAG_MPSAFE | (access),		\
538 	    ptr, val, sysctl_handle_32, "IU", descr);		\
539 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
540 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U32) && \
541 	    sizeof(uint32_t) == sizeof(*(ptr)))
542 
543 #define	SYSCTL_ADD_U32(ctx, parent, nbr, name, access, ptr, val, descr)	\
544 ({									\
545 	uint32_t *__ptr = (ptr);					\
546 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
547 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U32);		\
548 	sysctl_add_oid(ctx, parent, nbr, name,				\
549 	    CTLTYPE_U32 | CTLFLAG_MPSAFE | (access),			\
550 	    __ptr, val, sysctl_handle_32, "IU", __DESCR(descr), NULL);	\
551 })
552 
553 /* Oid for a signed 64-bit int.  If ptr is NULL, val is returned. */
554 #define	SYSCTL_NULL_S64_PTR ((int64_t *)NULL)
555 #define	SYSCTL_S64(parent, nbr, name, access, ptr, val, descr)	\
556 	SYSCTL_OID(parent, nbr, name,				\
557 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),		\
558 	    ptr, val, sysctl_handle_64, "Q", descr);		\
559 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
560 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64) && \
561 	    sizeof(int64_t) == sizeof(*(ptr)))
562 
563 #define	SYSCTL_ADD_S64(ctx, parent, nbr, name, access, ptr, val, descr)	\
564 ({									\
565 	int64_t *__ptr = (ptr);						\
566 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
567 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);		\
568 	sysctl_add_oid(ctx, parent, nbr, name,				\
569 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),			\
570 	    __ptr, val, sysctl_handle_64, "Q", __DESCR(descr), NULL);	\
571 })
572 
573 /* Oid for an unsigned 64-bit int.  If ptr is NULL, val is returned. */
574 #define	SYSCTL_NULL_U64_PTR ((uint64_t *)NULL)
575 #define	SYSCTL_U64(parent, nbr, name, access, ptr, val, descr)	\
576 	SYSCTL_OID(parent, nbr, name,				\
577 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),		\
578 	    ptr, val, sysctl_handle_64, "QU", descr);		\
579 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
580 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) && \
581 	    sizeof(uint64_t) == sizeof(*(ptr)))
582 
583 #define	SYSCTL_ADD_U64(ctx, parent, nbr, name, access, ptr, val, descr)	\
584 ({									\
585 	uint64_t *__ptr = (ptr);					\
586 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
587 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);		\
588 	sysctl_add_oid(ctx, parent, nbr, name,				\
589 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
590 	    __ptr, val, sysctl_handle_64, "QU", __DESCR(descr), NULL);	\
591 })
592 
593 /* Oid for an int.  If ptr is SYSCTL_NULL_INT_PTR, val is returned. */
594 #define	SYSCTL_NULL_INT_PTR ((int *)NULL)
595 #define	SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
596 	SYSCTL_INT_WITH_LABEL(parent, nbr, name, access, ptr, val, descr, NULL)
597 
598 #define	SYSCTL_INT_WITH_LABEL(parent, nbr, name, access, ptr, val, descr, label) \
599 	SYSCTL_OID_WITH_LABEL(parent, nbr, name,			\
600 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),			\
601 	    ptr, val, sysctl_handle_int, "I", descr, label);		\
602 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
603 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT) && \
604 	    sizeof(int) == sizeof(*(ptr)))
605 
606 #define	SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)	\
607 ({									\
608 	int *__ptr = (ptr);						\
609 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
610 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
611 	sysctl_add_oid(ctx, parent, nbr, name,				\
612 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),			\
613 	    __ptr, val, sysctl_handle_int, "I", __DESCR(descr), NULL);	\
614 })
615 
616 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
617 #define	SYSCTL_NULL_UINT_PTR ((unsigned *)NULL)
618 #define	SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr)	\
619 	SYSCTL_OID(parent, nbr, name,				\
620 	    CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),		\
621 	    ptr, val, sysctl_handle_int, "IU", descr);		\
622 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
623 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT) && \
624 	    sizeof(unsigned) == sizeof(*(ptr)))
625 
626 #define	SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \
627 ({									\
628 	unsigned *__ptr = (ptr);					\
629 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
630 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT);	\
631 	sysctl_add_oid(ctx, parent, nbr, name,				\
632 	    CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),			\
633 	    __ptr, val, sysctl_handle_int, "IU", __DESCR(descr), NULL);	\
634 })
635 
636 /* Oid for a long.  The pointer must be non NULL. */
637 #define	SYSCTL_NULL_LONG_PTR ((long *)NULL)
638 #define	SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr)	\
639 	SYSCTL_OID(parent, nbr, name,				\
640 	    CTLTYPE_LONG | CTLFLAG_MPSAFE | (access),		\
641 	    ptr, val, sysctl_handle_long, "L", descr);		\
642 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
643 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG) && \
644 	    sizeof(long) == sizeof(*(ptr)))
645 
646 #define	SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)	\
647 ({									\
648 	long *__ptr = (ptr);						\
649 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
650 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG);	\
651 	sysctl_add_oid(ctx, parent, nbr, name,				\
652 	    CTLTYPE_LONG | CTLFLAG_MPSAFE | (access),			\
653 	    __ptr, 0, sysctl_handle_long, "L", __DESCR(descr), NULL);	\
654 })
655 
656 /* Oid for an unsigned long.  The pointer must be non NULL. */
657 #define	SYSCTL_NULL_ULONG_PTR ((unsigned long *)NULL)
658 #define	SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr)	\
659 	SYSCTL_OID(parent, nbr, name,					\
660 	    CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access),			\
661 	    ptr, val, sysctl_handle_long, "LU", descr);			\
662 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
663 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG) &&	\
664 	    sizeof(unsigned long) == sizeof(*(ptr)))
665 
666 #define	SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)	\
667 ({									\
668 	unsigned long *__ptr = (ptr);					\
669 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
670 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG);	\
671 	sysctl_add_oid(ctx, parent, nbr, name,				\
672 	    CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access),			\
673 	    __ptr, 0, sysctl_handle_long, "LU", __DESCR(descr), NULL);	\
674 })
675 
676 /* Oid for a quad.  The pointer must be non NULL. */
677 #define	SYSCTL_NULL_QUAD_PTR ((int64_t *)NULL)
678 #define	SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr)	\
679 	SYSCTL_OID(parent, nbr, name,				\
680 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),		\
681 	    ptr, val, sysctl_handle_64, "Q", descr);		\
682 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
683 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64) && \
684 	    sizeof(int64_t) == sizeof(*(ptr)))
685 
686 #define	SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr)	\
687 ({									\
688 	int64_t *__ptr = (ptr);						\
689 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
690 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);		\
691 	sysctl_add_oid(ctx, parent, nbr, name,				\
692 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),			\
693 	    __ptr, 0, sysctl_handle_64, "Q", __DESCR(descr), NULL);	\
694 })
695 
696 #define	SYSCTL_NULL_UQUAD_PTR ((uint64_t *)NULL)
697 #define	SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr)	\
698 	SYSCTL_OID(parent, nbr, name,					\
699 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
700 	     ptr, val, sysctl_handle_64, "QU", descr);			\
701 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
702 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) &&	\
703 	    sizeof(uint64_t) == sizeof(*(ptr)))
704 
705 #define	SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr)	\
706 ({									\
707 	uint64_t *__ptr = (ptr);					\
708 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
709 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);		\
710 	sysctl_add_oid(ctx, parent, nbr, name,				\
711 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
712 	    __ptr, 0, sysctl_handle_64, "QU", __DESCR(descr), NULL);	\
713 })
714 
715 /* Oid for a CPU dependent variable */
716 #define	SYSCTL_ADD_UAUTO(ctx, parent, nbr, name, access, ptr, descr)	\
717 ({									\
718 	struct sysctl_oid *__ret;					\
719 	CTASSERT((sizeof(uint64_t) == sizeof(*(ptr)) ||			\
720 	    sizeof(unsigned) == sizeof(*(ptr))) &&			\
721 	    ((access) & CTLTYPE) == 0);					\
722 	if (sizeof(uint64_t) == sizeof(*(ptr))) {			\
723 		__ret = sysctl_add_oid(ctx, parent, nbr, name,		\
724 		    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),		\
725 		    (ptr), 0, sysctl_handle_64, "QU",			\
726 		    __DESCR(descr), NULL);				\
727 	} else {							\
728 		__ret = sysctl_add_oid(ctx, parent, nbr, name,		\
729 		    CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),		\
730 		    (ptr), 0, sysctl_handle_int, "IU",			\
731 		    __DESCR(descr), NULL);				\
732 	}								\
733 	__ret;								\
734 })
735 
736 /* Oid for a 64-bit unsigned counter(9).  The pointer must be non NULL. */
737 #define	SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, descr)	\
738 	SYSCTL_OID(parent, nbr, name,					\
739 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_STATS | (access),	\
740 	    (ptr), 0, sysctl_handle_counter_u64, "QU", descr);		\
741 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
742 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) &&	\
743 	    sizeof(counter_u64_t) == sizeof(*(ptr)) &&			\
744 	    sizeof(uint64_t) == sizeof(**(ptr)))
745 
746 #define	SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr) \
747 ({									\
748 	counter_u64_t *__ptr = (ptr);					\
749 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
750 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);		\
751 	sysctl_add_oid(ctx, parent, nbr, name,				\
752 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | CTLFLAG_STATS | (access),	\
753 	    __ptr, 0, sysctl_handle_counter_u64, "QU", __DESCR(descr),	\
754 	    NULL);							\
755 })
756 
757 /* Oid for an array of counter(9)s.  The pointer and length must be non zero. */
758 #define	SYSCTL_COUNTER_U64_ARRAY(parent, nbr, name, access, ptr, len, descr) \
759 	SYSCTL_OID(parent, nbr, name,					\
760 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | CTLFLAG_STATS | (access),	\
761 	    (ptr), (len), sysctl_handle_counter_u64_array, "S", descr);	\
762 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
763 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE) &&	\
764 	    sizeof(counter_u64_t) == sizeof(*(ptr)) &&			\
765 	    sizeof(uint64_t) == sizeof(**(ptr)))
766 
767 #define	SYSCTL_ADD_COUNTER_U64_ARRAY(ctx, parent, nbr, name, access,	\
768     ptr, len, descr)							\
769 ({									\
770 	counter_u64_t *__ptr = (ptr);					\
771 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
772 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);	\
773 	sysctl_add_oid(ctx, parent, nbr, name,				\
774 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | CTLFLAG_STATS | (access),	\
775 	    __ptr, len, sysctl_handle_counter_u64_array, "S",		\
776 	    __DESCR(descr), NULL);					\
777 })
778 
779 /* Oid for an opaque object.  Specified by a pointer and a length. */
780 #define	SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr)	\
781 	SYSCTL_OID(parent, nbr, name,					\
782 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),			\
783 	    ptr, len, sysctl_handle_opaque, fmt, descr);		\
784 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
785 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
786 
787 #define	SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)	\
788 ({									\
789 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
790 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);	\
791 	sysctl_add_oid(ctx, parent, nbr, name,				\
792 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),			\
793 	    ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr), NULL);	\
794 })
795 
796 /* Oid for a struct.  Specified by a pointer and a type. */
797 #define	SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr)	\
798 	SYSCTL_OID(parent, nbr, name,					\
799 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),			\
800 	    ptr, sizeof(struct type), sysctl_handle_opaque,		\
801 	    "S," #type, descr);						\
802 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
803 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
804 
805 #define	SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
806 ({									\
807 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
808 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);	\
809 	sysctl_add_oid(ctx, parent, nbr, name,				\
810 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),			\
811 	    (ptr), sizeof(struct type),					\
812 	    sysctl_handle_opaque, "S," #type, __DESCR(descr), NULL);	\
813 })
814 
815 /* Oid for a procedure.  Specified by a pointer and an arg. */
816 #define	SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
817 	SYSCTL_OID(parent, nbr, name, (access),				\
818 	    ptr, arg, handler, fmt, descr);				\
819 	CTASSERT(((access) & CTLTYPE) != 0)
820 
821 #define	SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
822 ({									\
823 	CTASSERT(((access) & CTLTYPE) != 0);				\
824 	SYSCTL_ENFORCE_FLAGS(access);					\
825 	sysctl_add_oid(ctx, parent, nbr, name, (access),		\
826 	    (ptr), (arg), (handler), (fmt), __DESCR(descr), NULL);	\
827 })
828 
829 /* Oid to handle limits on uma(9) zone specified by pointer. */
830 #define	SYSCTL_UMA_MAX(parent, nbr, name, access, ptr, descr)	\
831 	SYSCTL_OID(parent, nbr, name,				\
832 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),		\
833 	    (ptr), 0, sysctl_handle_uma_zone_max, "I", descr);	\
834 	CTASSERT(((access) & CTLTYPE) == 0 ||			\
835 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
836 
837 #define	SYSCTL_ADD_UMA_MAX(ctx, parent, nbr, name, access, ptr, descr)	\
838 ({									\
839 	uma_zone_t __ptr = (ptr);					\
840 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
841 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
842 	sysctl_add_oid(ctx, parent, nbr, name,				\
843 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),			\
844 	    __ptr, 0, sysctl_handle_uma_zone_max, "I", __DESCR(descr),	\
845 	    NULL);							\
846 })
847 
848 /* Oid to obtain current use of uma(9) zone specified by pointer. */
849 #define	SYSCTL_UMA_CUR(parent, nbr, name, access, ptr, descr)		\
850 	SYSCTL_OID(parent, nbr, name,					\
851 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
852 	    (ptr), 0, sysctl_handle_uma_zone_cur, "I", descr);		\
853 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
854 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
855 
856 #define	SYSCTL_ADD_UMA_CUR(ctx, parent, nbr, name, access, ptr, descr)	\
857 ({									\
858 	uma_zone_t __ptr = (ptr);					\
859 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
860 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
861 	sysctl_add_oid(ctx, parent, nbr, name,				\
862 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
863 	    __ptr, 0, sysctl_handle_uma_zone_cur, "I", __DESCR(descr),	\
864 	    NULL);							\
865 })
866 
867 /* OID expressing a sbintime_t as microseconds */
868 #define	SYSCTL_SBINTIME_USEC(parent, nbr, name, access, ptr, descr)	\
869 	SYSCTL_OID(parent, nbr, name,					\
870 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
871 	    (ptr), 0, sysctl_usec_to_sbintime, "Q", descr);		\
872 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
873 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64)
874 #define	SYSCTL_ADD_SBINTIME_USEC(ctx, parent, nbr, name, access, ptr, descr) \
875 ({									\
876 	sbintime_t *__ptr = (ptr);					\
877 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
878 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);		\
879 	sysctl_add_oid(ctx, parent, nbr, name,				\
880 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
881 	    __ptr, 0, sysctl_usec_to_sbintime, "Q", __DESCR(descr),	\
882 	    NULL);							\
883 })
884 
885 /* OID expressing a sbintime_t as milliseconds */
886 #define	SYSCTL_SBINTIME_MSEC(parent, nbr, name, access, ptr, descr)	\
887 	SYSCTL_OID(parent, nbr, name,					\
888 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
889 	    (ptr), 0, sysctl_msec_to_sbintime, "Q", descr);		\
890 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
891 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64)
892 #define	SYSCTL_ADD_SBINTIME_MSEC(ctx, parent, nbr, name, access, ptr, descr) \
893 ({									\
894 	sbintime_t *__ptr = (ptr);					\
895 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
896 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);		\
897 	sysctl_add_oid(ctx, parent, nbr, name,				\
898 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
899 	    __ptr, 0, sysctl_msec_to_sbintime, "Q", __DESCR(descr),	\
900 	    NULL);							\
901 })
902 
903 /* OID expressing a struct timeval as seconds */
904 #define	SYSCTL_TIMEVAL_SEC(parent, nbr, name, access, ptr, descr)	\
905 	SYSCTL_OID(parent, nbr, name,					\
906 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
907 	    (ptr), 0, sysctl_sec_to_timeval, "I", descr);		\
908 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
909 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
910 #define	SYSCTL_ADD_TIMEVAL_SEC(ctx, parent, nbr, name, access, ptr, descr) \
911 ({									\
912 	struct timeval *__ptr = (ptr);					\
913 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
914 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
915 	sysctl_add_oid(ctx, parent, nbr, name,				\
916 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
917 	    __ptr, 0, sysctl_sec_to_timeval, "I", __DESCR(descr),	\
918 	    NULL);							\
919 })
920 
921 #define	SYSCTL_FOREACH(oidp, list) \
922 	RB_FOREACH(oidp, sysctl_oid_list, list)
923 
924 /*
925  * A macro to generate a read-only sysctl to indicate the presence of optional
926  * kernel features.
927  */
928 #define	FEATURE(name, desc)						\
929 	SYSCTL_INT_WITH_LABEL(_kern_features, OID_AUTO, name,		\
930 	    CTLFLAG_RD | CTLFLAG_CAPRD, SYSCTL_NULL_INT_PTR, 1, desc, "feature")
931 
932 #endif /* _KERNEL */
933 
934 /*
935  * Top-level identifiers
936  */
937 #define	CTL_SYSCTL	0		/* "magic" numbers */
938 #define	CTL_KERN	1		/* "high kernel": proc, limits */
939 #define	CTL_VM		2		/* virtual memory */
940 #define	CTL_VFS		3		/* filesystem, mount type is next */
941 #define	CTL_NET		4		/* network, see socket.h */
942 #define	CTL_DEBUG	5		/* debugging parameters */
943 #define	CTL_HW		6		/* generic cpu/io */
944 #define	CTL_MACHDEP	7		/* machine dependent */
945 #define	CTL_USER	8		/* user-level */
946 #define	CTL_P1003_1B	9		/* POSIX 1003.1B */
947 
948 /*
949  * CTL_SYSCTL identifiers
950  */
951 #define	CTL_SYSCTL_DEBUG	0	/* printf all nodes */
952 #define	CTL_SYSCTL_NAME		1	/* string name of OID */
953 #define	CTL_SYSCTL_NEXT		2	/* next OID, honoring CTLFLAG_SKIP */
954 #define	CTL_SYSCTL_NAME2OID	3	/* int array of name */
955 #define	CTL_SYSCTL_OIDFMT	4	/* OID's kind and format */
956 #define	CTL_SYSCTL_OIDDESCR	5	/* OID's description */
957 #define	CTL_SYSCTL_OIDLABEL	6	/* aggregation label */
958 #define	CTL_SYSCTL_NEXTNOSKIP	7	/* next OID, ignoring CTLFLAG_SKIP */
959 
960 /*
961  * CTL_KERN identifiers
962  */
963 #define	KERN_OSTYPE		 1	/* string: system version */
964 #define	KERN_OSRELEASE		 2	/* string: system release */
965 #define	KERN_OSREV		 3	/* int: system revision */
966 #define	KERN_VERSION		 4	/* string: compile time info */
967 #define	KERN_MAXVNODES		 5	/* int: max vnodes */
968 #define	KERN_MAXPROC		 6	/* int: max processes */
969 #define	KERN_MAXFILES		 7	/* int: max open files */
970 #define	KERN_ARGMAX		 8	/* int: max arguments to exec */
971 #define	KERN_SECURELVL		 9	/* int: system security level */
972 #define	KERN_HOSTNAME		10	/* string: hostname */
973 #define	KERN_HOSTID		11	/* int: host identifier */
974 #define	KERN_CLOCKRATE		12	/* struct: struct clockrate */
975 #define	KERN_VNODE		13	/* struct: vnode structures */
976 #define	KERN_PROC		14	/* struct: process entries */
977 #define	KERN_FILE		15	/* struct: file entries */
978 #define	KERN_PROF		16	/* node: kernel profiling info */
979 #define	KERN_POSIX1		17	/* int: POSIX.1 version */
980 #define	KERN_NGROUPS		18	/* int: # of supplemental group ids */
981 #define	KERN_JOB_CONTROL	19	/* int: is job control available */
982 #define	KERN_SAVED_IDS		20	/* int: saved set-user/group-ID */
983 #define	KERN_BOOTTIME		21	/* struct: time kernel was booted */
984 #define	KERN_NISDOMAINNAME	22	/* string: YP domain name */
985 #define	KERN_UPDATEINTERVAL	23	/* int: update process sleep time */
986 #define	KERN_OSRELDATE		24	/* int: kernel release date */
987 #define	KERN_NTP_PLL		25	/* node: NTP PLL control */
988 #define	KERN_BOOTFILE		26	/* string: name of booted kernel */
989 #define	KERN_MAXFILESPERPROC	27	/* int: max open files per proc */
990 #define	KERN_MAXPROCPERUID	28	/* int: max processes per uid */
991 #define	KERN_DUMPDEV		29	/* struct cdev *: device to dump on */
992 #define	KERN_IPC		30	/* node: anything related to IPC */
993 #define	KERN_DUMMY		31	/* unused */
994 #define	KERN_PS_STRINGS		32	/* int: address of PS_STRINGS */
995 #define	KERN_USRSTACK		33	/* int: address of USRSTACK */
996 #define	KERN_LOGSIGEXIT		34	/* int: do we log sigexit procs? */
997 #define	KERN_IOV_MAX		35	/* int: value of UIO_MAXIOV */
998 #define	KERN_HOSTUUID		36	/* string: host UUID identifier */
999 #define	KERN_ARND		37	/* int: from arc4rand() */
1000 #define	KERN_MAXPHYS		38	/* int: MAXPHYS value */
1001 #define	KERN_LOCKF		39	/* struct: lockf reports */
1002 /*
1003  * KERN_PROC subtypes
1004  */
1005 #define	KERN_PROC_ALL		0	/* everything */
1006 #define	KERN_PROC_PID		1	/* by process id */
1007 #define	KERN_PROC_PGRP		2	/* by process group id */
1008 #define	KERN_PROC_SESSION	3	/* by session of pid */
1009 #define	KERN_PROC_TTY		4	/* by controlling tty */
1010 #define	KERN_PROC_UID		5	/* by effective uid */
1011 #define	KERN_PROC_RUID		6	/* by real uid */
1012 #define	KERN_PROC_ARGS		7	/* get/set arguments/proctitle */
1013 #define	KERN_PROC_PROC		8	/* only return procs */
1014 #define	KERN_PROC_SV_NAME	9	/* get syscall vector name */
1015 #define	KERN_PROC_RGID		10	/* by real group id */
1016 #define	KERN_PROC_GID		11	/* by effective group id */
1017 #define	KERN_PROC_PATHNAME	12	/* path to executable */
1018 #define	KERN_PROC_OVMMAP	13	/* Old VM map entries for process */
1019 #define	KERN_PROC_OFILEDESC	14	/* Old file descriptors for process */
1020 #define	KERN_PROC_KSTACK	15	/* Kernel stacks for process */
1021 #define	KERN_PROC_INC_THREAD	0x10	/*
1022 					 * modifier for pid, pgrp, tty,
1023 					 * uid, ruid, gid, rgid and proc
1024 					 * This effectively uses 16-31
1025 					 */
1026 #define	KERN_PROC_VMMAP		32	/* VM map entries for process */
1027 #define	KERN_PROC_FILEDESC	33	/* File descriptors for process */
1028 #define	KERN_PROC_GROUPS	34	/* process groups */
1029 #define	KERN_PROC_ENV		35	/* get environment */
1030 #define	KERN_PROC_AUXV		36	/* get ELF auxiliary vector */
1031 #define	KERN_PROC_RLIMIT	37	/* process resource limits */
1032 #define	KERN_PROC_PS_STRINGS	38	/* get ps_strings location */
1033 #define	KERN_PROC_UMASK		39	/* process umask */
1034 #define	KERN_PROC_OSREL		40	/* osreldate for process binary */
1035 #define	KERN_PROC_SIGTRAMP	41	/* signal trampoline location */
1036 #define	KERN_PROC_CWD		42	/* process current working directory */
1037 #define	KERN_PROC_NFDS		43	/* number of open file descriptors */
1038 #define	KERN_PROC_SIGFASTBLK	44	/* address of fastsigblk magic word */
1039 #define	KERN_PROC_VM_LAYOUT	45	/* virtual address space layout info */
1040 
1041 /*
1042  * KERN_IPC identifiers
1043  */
1044 #define	KIPC_MAXSOCKBUF		1	/* int: max size of a socket buffer */
1045 #define	KIPC_SOCKBUF_WASTE	2	/* int: wastage factor in sockbuf */
1046 #define	KIPC_SOMAXCONN		3	/* int: max length of connection q */
1047 #define	KIPC_MAX_LINKHDR	4	/* int: max length of link header */
1048 #define	KIPC_MAX_PROTOHDR	5	/* int: max length of network header */
1049 #define	KIPC_MAX_HDR		6	/* int: max total length of headers */
1050 #define	KIPC_MAX_DATALEN	7	/* int: max length of data? */
1051 
1052 /*
1053  * CTL_HW identifiers
1054  */
1055 #define	HW_MACHINE	 1		/* string: machine class */
1056 #define	HW_MODEL	 2		/* string: specific machine model */
1057 #define	HW_NCPU		 3		/* int: number of cpus */
1058 #define	HW_BYTEORDER	 4		/* int: machine byte order */
1059 #define	HW_PHYSMEM	 5		/* int: total memory */
1060 #define	HW_USERMEM	 6		/* int: non-kernel memory */
1061 #define	HW_PAGESIZE	 7		/* int: software page size */
1062 #define	HW_DISKNAMES	 8		/* strings: disk drive names */
1063 #define	HW_DISKSTATS	 9		/* struct: diskstats[] */
1064 #define	HW_FLOATINGPT	10		/* int: has HW floating point? */
1065 #define	HW_MACHINE_ARCH	11		/* string: machine architecture */
1066 #define	HW_REALMEM	12		/* int: 'real' memory */
1067 
1068 /*
1069  * CTL_USER definitions
1070  */
1071 #define	USER_CS_PATH		 1	/* string: _CS_PATH */
1072 #define	USER_BC_BASE_MAX	 2	/* int: BC_BASE_MAX */
1073 #define	USER_BC_DIM_MAX		 3	/* int: BC_DIM_MAX */
1074 #define	USER_BC_SCALE_MAX	 4	/* int: BC_SCALE_MAX */
1075 #define	USER_BC_STRING_MAX	 5	/* int: BC_STRING_MAX */
1076 #define	USER_COLL_WEIGHTS_MAX	 6	/* int: COLL_WEIGHTS_MAX */
1077 #define	USER_EXPR_NEST_MAX	 7	/* int: EXPR_NEST_MAX */
1078 #define	USER_LINE_MAX		 8	/* int: LINE_MAX */
1079 #define	USER_RE_DUP_MAX		 9	/* int: RE_DUP_MAX */
1080 #define	USER_POSIX2_VERSION	10	/* int: POSIX2_VERSION */
1081 #define	USER_POSIX2_C_BIND	11	/* int: POSIX2_C_BIND */
1082 #define	USER_POSIX2_C_DEV	12	/* int: POSIX2_C_DEV */
1083 #define	USER_POSIX2_CHAR_TERM	13	/* int: POSIX2_CHAR_TERM */
1084 #define	USER_POSIX2_FORT_DEV	14	/* int: POSIX2_FORT_DEV */
1085 #define	USER_POSIX2_FORT_RUN	15	/* int: POSIX2_FORT_RUN */
1086 #define	USER_POSIX2_LOCALEDEF	16	/* int: POSIX2_LOCALEDEF */
1087 #define	USER_POSIX2_SW_DEV	17	/* int: POSIX2_SW_DEV */
1088 #define	USER_POSIX2_UPE		18	/* int: POSIX2_UPE */
1089 #define	USER_STREAM_MAX		19	/* int: POSIX2_STREAM_MAX */
1090 #define	USER_TZNAME_MAX		20	/* int: POSIX2_TZNAME_MAX */
1091 #define	USER_LOCALBASE		21	/* string: _PATH_LOCALBASE */
1092 
1093 #define	CTL_P1003_1B_ASYNCHRONOUS_IO		1	/* boolean */
1094 #define	CTL_P1003_1B_MAPPED_FILES		2	/* boolean */
1095 #define	CTL_P1003_1B_MEMLOCK			3	/* boolean */
1096 #define	CTL_P1003_1B_MEMLOCK_RANGE		4	/* boolean */
1097 #define	CTL_P1003_1B_MEMORY_PROTECTION		5	/* boolean */
1098 #define	CTL_P1003_1B_MESSAGE_PASSING		6	/* boolean */
1099 #define	CTL_P1003_1B_PRIORITIZED_IO		7	/* boolean */
1100 #define	CTL_P1003_1B_PRIORITY_SCHEDULING	8	/* boolean */
1101 #define	CTL_P1003_1B_REALTIME_SIGNALS		9	/* boolean */
1102 #define	CTL_P1003_1B_SEMAPHORES			10	/* boolean */
1103 #define	CTL_P1003_1B_FSYNC			11	/* boolean */
1104 #define	CTL_P1003_1B_SHARED_MEMORY_OBJECTS	12	/* boolean */
1105 #define	CTL_P1003_1B_SYNCHRONIZED_IO		13	/* boolean */
1106 #define	CTL_P1003_1B_TIMERS			14	/* boolean */
1107 #define	CTL_P1003_1B_AIO_LISTIO_MAX		15	/* int */
1108 #define	CTL_P1003_1B_AIO_MAX			16	/* int */
1109 #define	CTL_P1003_1B_AIO_PRIO_DELTA_MAX		17	/* int */
1110 #define	CTL_P1003_1B_DELAYTIMER_MAX		18	/* int */
1111 #define	CTL_P1003_1B_MQ_OPEN_MAX		19	/* int */
1112 #define	CTL_P1003_1B_PAGESIZE			20	/* int */
1113 #define	CTL_P1003_1B_RTSIG_MAX			21	/* int */
1114 #define	CTL_P1003_1B_SEM_NSEMS_MAX		22	/* int */
1115 #define	CTL_P1003_1B_SEM_VALUE_MAX		23	/* int */
1116 #define	CTL_P1003_1B_SIGQUEUE_MAX		24	/* int */
1117 #define	CTL_P1003_1B_TIMER_MAX			25	/* int */
1118 
1119 #ifdef _KERNEL
1120 
1121 #define	CTL_P1003_1B_MAXID		26
1122 
1123 /*
1124  * Declare some common oids.
1125  */
1126 extern struct sysctl_oid_list sysctl__children;
1127 SYSCTL_DECL(_kern);
1128 SYSCTL_DECL(_kern_features);
1129 SYSCTL_DECL(_kern_ipc);
1130 SYSCTL_DECL(_kern_proc);
1131 SYSCTL_DECL(_kern_sched);
1132 SYSCTL_DECL(_kern_sched_stats);
1133 SYSCTL_DECL(_sysctl);
1134 SYSCTL_DECL(_vm);
1135 SYSCTL_DECL(_vm_stats);
1136 SYSCTL_DECL(_vm_stats_misc);
1137 SYSCTL_DECL(_vfs);
1138 SYSCTL_DECL(_net);
1139 SYSCTL_DECL(_debug);
1140 SYSCTL_DECL(_debug_sizeof);
1141 SYSCTL_DECL(_dev);
1142 SYSCTL_DECL(_hw);
1143 SYSCTL_DECL(_hw_bus);
1144 SYSCTL_DECL(_hw_bus_devices);
1145 SYSCTL_DECL(_machdep);
1146 SYSCTL_DECL(_machdep_mitigations);
1147 SYSCTL_DECL(_user);
1148 SYSCTL_DECL(_compat);
1149 SYSCTL_DECL(_regression);
1150 SYSCTL_DECL(_security);
1151 SYSCTL_DECL(_security_bsd);
1152 
1153 extern char	machine[];
1154 extern char	osrelease[];
1155 extern char	ostype[];
1156 extern char	kern_ident[];
1157 
1158 /* Dynamic oid handling */
1159 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
1160 	    struct sysctl_oid_list *parent, int nbr, const char *name, int kind,
1161 	    void *arg1, intmax_t arg2, int (*handler)(SYSCTL_HANDLER_ARGS),
1162 	    const char *fmt, const char *descr, const char *label);
1163 int	sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del,
1164 	    int recurse);
1165 void	sysctl_rename_oid(struct sysctl_oid *oidp, const char *name);
1166 int	sysctl_move_oid(struct sysctl_oid *oidp,
1167 	    struct sysctl_oid_list *parent);
1168 int	sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
1169 int	sysctl_ctx_init(struct sysctl_ctx_list *clist);
1170 int	sysctl_ctx_free(struct sysctl_ctx_list *clist);
1171 struct	sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
1172 	    struct sysctl_oid *oidp);
1173 struct	sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
1174 	    struct sysctl_oid *oidp);
1175 int	sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
1176 	    struct sysctl_oid *oidp);
1177 
1178 int	kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
1179 	    size_t *oldlenp, void *new, size_t newlen, size_t *retval,
1180 	    int flags);
1181 int	kernel_sysctlbyname(struct thread *td, char *name, void *old,
1182 	    size_t *oldlenp, void *new, size_t newlen, size_t *retval,
1183 	    int flags);
1184 int	userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
1185 	    size_t *oldlenp, int inkernel, const void *new, size_t newlen,
1186 	    size_t *retval, int flags);
1187 int	sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
1188 	    int *nindx, struct sysctl_req *req);
1189 void	sysctl_wlock(void);
1190 void	sysctl_wunlock(void);
1191 int	sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
1192 int	kern___sysctlbyname(struct thread *td, const char *name,
1193 	    size_t namelen, void *old, size_t *oldlenp, void *new,
1194 	    size_t newlen, size_t *retval, int flags, bool inkernel);
1195 
1196 struct sbuf;
1197 struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int,
1198 	    struct sysctl_req *);
1199 #else	/* !_KERNEL */
1200 #include <sys/cdefs.h>
1201 #include <sys/_types.h>
1202 #ifndef _SIZE_T_DECLARED
1203 typedef	__size_t	size_t;
1204 #define	_SIZE_T_DECLARED
1205 #endif
1206 
1207 __BEGIN_DECLS
1208 int	sysctl(const int *, unsigned int, void *, size_t *, const void *, size_t);
1209 int	sysctlbyname(const char *, void *, size_t *, const void *, size_t);
1210 int	sysctlnametomib(const char *, int *, size_t *);
1211 __END_DECLS
1212 #endif	/* _KERNEL */
1213 
1214 #endif	/* !_SYS_SYSCTL_H_ */
1215