xref: /freebsd/sys/sys/sysctl.h (revision 273c26a3c3bea87a241d6879abd4f991db180bf0)
1 /*-
2  * Copyright (c) 1989, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * This code is derived from software contributed to Berkeley by
6  * Mike Karels at Berkeley Software Design, Inc.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
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.
19  *
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
30  * SUCH DAMAGE.
31  *
32  *	@(#)sysctl.h	8.1 (Berkeley) 6/2/93
33  * $FreeBSD$
34  */
35 
36 #ifndef _SYS_SYSCTL_H_
37 #define	_SYS_SYSCTL_H_
38 
39 #include <sys/queue.h>
40 
41 struct thread;
42 /*
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.
49  */
50 
51 #define	CTL_MAXNAME	24	/* largest number of components supported */
52 
53 /*
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.
59  */
60 struct ctlname {
61 	char	*ctl_name;	/* subsystem name */
62 	int	 ctl_type;	/* type of name */
63 };
64 
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 */
76 #define	CTLTYPE_U8	0xa	/* name describes an unsigned 8-bit number */
77 #define	CTLTYPE_U16	0xb	/* name describes an unsigned 16-bit number */
78 #define	CTLTYPE_S8	0xc	/* name describes a signed 8-bit number */
79 #define	CTLTYPE_S16	0xd	/* name describes a signed 16-bit number */
80 #define	CTLTYPE_S32	0xe	/* name describes a signed 32-bit number */
81 #define	CTLTYPE_U32	0xf	/* name describes an unsigned 32-bit number */
82 
83 #define	CTLFLAG_RD	0x80000000	/* Allow reads of variable */
84 #define	CTLFLAG_WR	0x40000000	/* Allow writes to the variable */
85 #define	CTLFLAG_RW	(CTLFLAG_RD|CTLFLAG_WR)
86 #define	CTLFLAG_ANYBODY	0x10000000	/* All users can set this var */
87 #define	CTLFLAG_SECURE	0x08000000	/* Permit set only if securelevel<=0 */
88 #define	CTLFLAG_PRISON	0x04000000	/* Prisoned roots can fiddle */
89 #define	CTLFLAG_DYN	0x02000000	/* Dynamic oid - can be freed */
90 #define	CTLFLAG_SKIP	0x01000000	/* Skip this sysctl when listing */
91 #define	CTLMASK_SECURE	0x00F00000	/* Secure level */
92 #define	CTLFLAG_TUN	0x00080000	/* Default value is loaded from getenv() */
93 #define	CTLFLAG_RDTUN	(CTLFLAG_RD|CTLFLAG_TUN)
94 #define	CTLFLAG_RWTUN	(CTLFLAG_RW|CTLFLAG_TUN)
95 #define	CTLFLAG_MPSAFE	0x00040000	/* Handler is MP safe */
96 #define	CTLFLAG_VNET	0x00020000	/* Prisons with vnet can fiddle */
97 #define	CTLFLAG_DYING	0x00010000	/* Oid is being removed */
98 #define	CTLFLAG_CAPRD	0x00008000	/* Can be read in capability mode */
99 #define	CTLFLAG_CAPWR	0x00004000	/* Can be written in capability mode */
100 #define	CTLFLAG_STATS	0x00002000	/* Statistics, not a tuneable */
101 #define	CTLFLAG_NOFETCH	0x00001000	/* Don't fetch tunable from getenv() */
102 #define	CTLFLAG_CAPRW	(CTLFLAG_CAPRD|CTLFLAG_CAPWR)
103 
104 /*
105  * Secure level.   Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.
106  *
107  * Secure when the securelevel is raised to at least N.
108  */
109 #define	CTLSHIFT_SECURE	20
110 #define	CTLFLAG_SECURE1	(CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
111 #define	CTLFLAG_SECURE2	(CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
112 #define	CTLFLAG_SECURE3	(CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
113 
114 /*
115  * USE THIS instead of a hardwired number from the categories below
116  * to get dynamically assigned sysctl entries using the linker-set
117  * technology. This is the way nearly all new sysctl variables should
118  * be implemented.
119  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
120  */
121 #define	OID_AUTO	(-1)
122 
123 /*
124  * The starting number for dynamically-assigned entries.  WARNING!
125  * ALL static sysctl entries should have numbers LESS than this!
126  */
127 #define	CTL_AUTO_START	0x100
128 
129 #ifdef _KERNEL
130 #include <sys/linker_set.h>
131 
132 #ifdef KLD_MODULE
133 /* XXX allow overspecification of type in external kernel modules */
134 #define	SYSCTL_CT_ASSERT_MASK CTLTYPE
135 #else
136 #define	SYSCTL_CT_ASSERT_MASK 0
137 #endif
138 
139 #define	SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1,	\
140 	intmax_t arg2, struct sysctl_req *req
141 
142 /* definitions for sysctl_req 'lock' member */
143 #define	REQ_UNWIRED	1
144 #define	REQ_WIRED	2
145 
146 /* definitions for sysctl_req 'flags' member */
147 #if defined(__amd64__) || defined(__powerpc64__) ||\
148     (defined(__mips__) && defined(__mips_n64))
149 #define	SCTL_MASK32	1	/* 32 bit emulation */
150 #endif
151 
152 /*
153  * This describes the access space for a sysctl request.  This is needed
154  * so that we can use the interface from the kernel or from user-space.
155  */
156 struct sysctl_req {
157 	struct thread	*td;		/* used for access checking */
158 	int		 lock;		/* wiring state */
159 	void		*oldptr;
160 	size_t		 oldlen;
161 	size_t		 oldidx;
162 	int		(*oldfunc)(struct sysctl_req *, const void *, size_t);
163 	void		*newptr;
164 	size_t		 newlen;
165 	size_t		 newidx;
166 	int		(*newfunc)(struct sysctl_req *, void *, size_t);
167 	size_t		 validlen;
168 	int		 flags;
169 };
170 
171 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
172 
173 /*
174  * This describes one "oid" in the MIB tree.  Potentially more nodes can
175  * be hidden behind it, expanded by the handler.
176  */
177 struct sysctl_oid {
178 	struct sysctl_oid_list oid_children;
179 	struct sysctl_oid_list *oid_parent;
180 	SLIST_ENTRY(sysctl_oid) oid_link;
181 	int		 oid_number;
182 	u_int		 oid_kind;
183 	void		*oid_arg1;
184 	intmax_t	 oid_arg2;
185 	const char	*oid_name;
186 	int		(*oid_handler)(SYSCTL_HANDLER_ARGS);
187 	const char	*oid_fmt;
188 	int		 oid_refcnt;
189 	u_int		 oid_running;
190 	const char	*oid_descr;
191 };
192 
193 #define	SYSCTL_IN(r, p, l)	(r->newfunc)(r, p, l)
194 #define	SYSCTL_OUT(r, p, l)	(r->oldfunc)(r, p, l)
195 #define	SYSCTL_OUT_STR(r, p)	(r->oldfunc)(r, p, strlen(p) + 1)
196 
197 int sysctl_handle_bool(SYSCTL_HANDLER_ARGS);
198 int sysctl_handle_8(SYSCTL_HANDLER_ARGS);
199 int sysctl_handle_16(SYSCTL_HANDLER_ARGS);
200 int sysctl_handle_32(SYSCTL_HANDLER_ARGS);
201 int sysctl_handle_64(SYSCTL_HANDLER_ARGS);
202 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
203 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
204 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
205 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
206 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
207 int sysctl_handle_counter_u64(SYSCTL_HANDLER_ARGS);
208 int sysctl_handle_counter_u64_array(SYSCTL_HANDLER_ARGS);
209 
210 int sysctl_handle_uma_zone_max(SYSCTL_HANDLER_ARGS);
211 int sysctl_handle_uma_zone_cur(SYSCTL_HANDLER_ARGS);
212 
213 int sysctl_dpcpu_int(SYSCTL_HANDLER_ARGS);
214 int sysctl_dpcpu_long(SYSCTL_HANDLER_ARGS);
215 int sysctl_dpcpu_quad(SYSCTL_HANDLER_ARGS);
216 
217 /*
218  * These functions are used to add/remove an oid from the mib.
219  */
220 void sysctl_register_oid(struct sysctl_oid *oidp);
221 void sysctl_unregister_oid(struct sysctl_oid *oidp);
222 
223 /* Declare a static oid to allow child oids to be added to it. */
224 #define	SYSCTL_DECL(name)			\
225 	extern struct sysctl_oid sysctl__##name
226 
227 /* Hide these in macros. */
228 #define	SYSCTL_CHILDREN(oid_ptr)		(&(oid_ptr)->oid_children)
229 #define	SYSCTL_PARENT(oid_ptr)					\
230     (((oid_ptr)->oid_parent != &sysctl__children) ?		\
231 	__containerof((oid_ptr)->oid_parent, struct sysctl_oid,	\
232 	oid_children) : (struct sysctl_oid *)NULL)
233 #define	SYSCTL_STATIC_CHILDREN(oid_name)	(&sysctl__##oid_name.oid_children)
234 
235 /* === Structs and macros related to context handling. === */
236 
237 /* All dynamically created sysctls can be tracked in a context list. */
238 struct sysctl_ctx_entry {
239 	struct sysctl_oid *entry;
240 	TAILQ_ENTRY(sysctl_ctx_entry) link;
241 };
242 
243 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
244 
245 #define	SYSCTL_NODE_CHILDREN(parent, name) \
246 	sysctl__##parent##_##name.oid_children
247 
248 #ifndef NO_SYSCTL_DESCR
249 #define	__DESCR(d) d
250 #else
251 #define	__DESCR(d) ""
252 #endif
253 
254 /* This macro is only for internal use */
255 #define	SYSCTL_OID_RAW(id, parent_child_head, nbr, name, kind, a1, a2, handler, fmt, descr) \
256 	struct sysctl_oid id = {					\
257 		.oid_parent = (parent_child_head),			\
258 		.oid_children = SLIST_HEAD_INITIALIZER(&id.oid_children), \
259 		.oid_number = (nbr),					\
260 		.oid_kind = (kind),					\
261 		.oid_arg1 = (a1),					\
262 		.oid_arg2 = (a2),					\
263 		.oid_name = (name),					\
264 		.oid_handler = (handler),				\
265 		.oid_fmt = (fmt),					\
266 		.oid_descr = __DESCR(descr)				\
267 	};								\
268 	DATA_SET(sysctl_set, id)
269 
270 /* This constructs a static "raw" MIB oid. */
271 #define	SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
272     static SYSCTL_OID_RAW(sysctl__##parent##_##name, \
273 	SYSCTL_CHILDREN(&sysctl__##parent), \
274 	nbr, #name, kind, a1, a2, handler, fmt, descr)
275 
276 /* This constructs a global "raw" MIB oid. */
277 #define	SYSCTL_OID_GLOBAL(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
278     SYSCTL_OID_RAW(sysctl__##parent##_##name, \
279 	SYSCTL_CHILDREN(&sysctl__##parent),	\
280 	nbr, #name, kind, a1, a2, handler, fmt, descr)
281 
282 #define	SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
283 	sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
284 
285 /* This constructs a root node from which other nodes can hang. */
286 #define	SYSCTL_ROOT_NODE(nbr, name, access, handler, descr)	\
287 	SYSCTL_OID_RAW(sysctl___##name, &sysctl__children,	\
288 	    nbr, #name, CTLTYPE_NODE|(access), NULL, 0,		\
289 	    handler, "N", descr);				\
290 	CTASSERT(((access) & CTLTYPE) == 0 ||			\
291 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
292 
293 /* This constructs a node from which other oids can hang. */
294 #define	SYSCTL_NODE(parent, nbr, name, access, handler, descr)		\
295 	SYSCTL_OID_GLOBAL(parent, nbr, name, CTLTYPE_NODE|(access),	\
296 	    NULL, 0, handler, "N", descr);				\
297 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
298 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE)
299 
300 #define	SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)	\
301 ({									\
302 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
303 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE);	\
304 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access),	\
305 	    NULL, 0, handler, "N", __DESCR(descr));			\
306 })
307 
308 #define	SYSCTL_ADD_ROOT_NODE(ctx, nbr, name, access, handler, descr)	\
309 ({									\
310 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
311 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_NODE);	\
312 	sysctl_add_oid(ctx, &sysctl__children, nbr, name,		\
313 	    CTLTYPE_NODE|(access),					\
314 	    NULL, 0, handler, "N", __DESCR(descr));			\
315 })
316 
317 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
318 #define	SYSCTL_STRING(parent, nbr, name, access, arg, len, descr)	\
319 	SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access),		\
320 	    arg, len, sysctl_handle_string, "A", descr);		\
321 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
322 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING)
323 
324 #define	SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \
325 ({									\
326 	char *__arg = (arg);						\
327 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
328 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_STRING);	\
329 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access),	\
330 	    __arg, len, sysctl_handle_string, "A", __DESCR(descr));	\
331 })
332 
333 /* Oid for a bool.  If ptr is NULL, val is returned. */
334 #define	SYSCTL_NULL_BOOL_PTR ((bool *)NULL)
335 #define	SYSCTL_BOOL(parent, nbr, name, access, ptr, val, descr)	\
336 	SYSCTL_OID(parent, nbr, name,				\
337 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),		\
338 	    ptr, val, sysctl_handle_bool, "CU", descr);		\
339 	CTASSERT(((access) & CTLTYPE) == 0 &&			\
340 	    sizeof(bool) == sizeof(*(ptr)))
341 
342 #define	SYSCTL_ADD_BOOL(ctx, parent, nbr, name, access, ptr, val, descr) \
343 ({									\
344 	bool *__ptr = (ptr);						\
345 	CTASSERT(((access) & CTLTYPE) == 0);				\
346 	sysctl_add_oid(ctx, parent, nbr, name,				\
347 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),			\
348 	    __ptr, val, sysctl_handle_bool, "CU", __DESCR(descr));	\
349 })
350 
351 /* Oid for a signed 8-bit int.  If ptr is NULL, val is returned. */
352 #define	SYSCTL_NULL_S8_PTR ((int8_t *)NULL)
353 #define	SYSCTL_S8(parent, nbr, name, access, ptr, val, descr)	\
354 	SYSCTL_OID(parent, nbr, name,				\
355 	    CTLTYPE_S8 | CTLFLAG_MPSAFE | (access),		\
356 	    ptr, val, sysctl_handle_8, "C", descr);		\
357 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
358 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S8) && \
359 	    sizeof(int8_t) == sizeof(*(ptr)))
360 
361 #define	SYSCTL_ADD_S8(ctx, parent, nbr, name, access, ptr, val, descr)	\
362 ({									\
363 	int8_t *__ptr = (ptr);						\
364 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
365 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S8);		\
366 	sysctl_add_oid(ctx, parent, nbr, name,				\
367 	    CTLTYPE_S8 | CTLFLAG_MPSAFE | (access),			\
368 	    __ptr, val, sysctl_handle_8, "C", __DESCR(descr));	\
369 })
370 
371 /* Oid for an unsigned 8-bit int.  If ptr is NULL, val is returned. */
372 #define	SYSCTL_NULL_U8_PTR ((uint8_t *)NULL)
373 #define	SYSCTL_U8(parent, nbr, name, access, ptr, val, descr)	\
374 	SYSCTL_OID(parent, nbr, name,				\
375 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),		\
376 	    ptr, val, sysctl_handle_8, "CU", descr);		\
377 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
378 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U8) && \
379 	    sizeof(uint8_t) == sizeof(*(ptr)))
380 
381 #define	SYSCTL_ADD_U8(ctx, parent, nbr, name, access, ptr, val, descr)	\
382 ({									\
383 	uint8_t *__ptr = (ptr);						\
384 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
385 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U8);		\
386 	sysctl_add_oid(ctx, parent, nbr, name,				\
387 	    CTLTYPE_U8 | CTLFLAG_MPSAFE | (access),			\
388 	    __ptr, val, sysctl_handle_8, "CU", __DESCR(descr));	\
389 })
390 
391 /* Oid for a signed 16-bit int.  If ptr is NULL, val is returned. */
392 #define	SYSCTL_NULL_S16_PTR ((int16_t *)NULL)
393 #define	SYSCTL_S16(parent, nbr, name, access, ptr, val, descr)	\
394 	SYSCTL_OID(parent, nbr, name,				\
395 	    CTLTYPE_S16 | CTLFLAG_MPSAFE | (access),		\
396 	    ptr, val, sysctl_handle_16, "S", descr);		\
397 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
398 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S16) && \
399 	    sizeof(int16_t) == sizeof(*(ptr)))
400 
401 #define	SYSCTL_ADD_S16(ctx, parent, nbr, name, access, ptr, val, descr)	\
402 ({									\
403 	int16_t *__ptr = (ptr);						\
404 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
405 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S16);		\
406 	sysctl_add_oid(ctx, parent, nbr, name,				\
407 	    CTLTYPE_S16 | CTLFLAG_MPSAFE | (access),			\
408 	    __ptr, val, sysctl_handle_16, "S", __DESCR(descr));	\
409 })
410 
411 /* Oid for an unsigned 16-bit int.  If ptr is NULL, val is returned. */
412 #define	SYSCTL_NULL_U16_PTR ((uint16_t *)NULL)
413 #define	SYSCTL_U16(parent, nbr, name, access, ptr, val, descr)	\
414 	SYSCTL_OID(parent, nbr, name,				\
415 	    CTLTYPE_U16 | CTLFLAG_MPSAFE | (access),		\
416 	    ptr, val, sysctl_handle_16, "SU", descr);		\
417 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
418 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U16) && \
419 	    sizeof(uint16_t) == sizeof(*(ptr)))
420 
421 #define	SYSCTL_ADD_U16(ctx, parent, nbr, name, access, ptr, val, descr)	\
422 ({									\
423 	uint16_t *__ptr = (ptr);					\
424 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
425 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U16);		\
426 	sysctl_add_oid(ctx, parent, nbr, name,				\
427 	    CTLTYPE_U16 | CTLFLAG_MPSAFE | (access),			\
428 	    __ptr, val, sysctl_handle_16, "SU", __DESCR(descr));	\
429 })
430 
431 /* Oid for a signed 32-bit int.  If ptr is NULL, val is returned. */
432 #define	SYSCTL_NULL_S32_PTR ((int32_t *)NULL)
433 #define	SYSCTL_S32(parent, nbr, name, access, ptr, val, descr)	\
434 	SYSCTL_OID(parent, nbr, name,				\
435 	    CTLTYPE_S32 | CTLFLAG_MPSAFE | (access),		\
436 	    ptr, val, sysctl_handle_32, "I", descr);		\
437 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
438 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S32) && \
439 	    sizeof(int32_t) == sizeof(*(ptr)))
440 
441 #define	SYSCTL_ADD_S32(ctx, parent, nbr, name, access, ptr, val, descr)	\
442 ({									\
443 	int32_t *__ptr = (ptr);						\
444 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
445 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S32);		\
446 	sysctl_add_oid(ctx, parent, nbr, name,				\
447 	    CTLTYPE_S32 | CTLFLAG_MPSAFE | (access),			\
448 	    __ptr, val, sysctl_handle_32, "I", __DESCR(descr));	\
449 })
450 
451 /* Oid for an unsigned 32-bit int.  If ptr is NULL, val is returned. */
452 #define	SYSCTL_NULL_U32_PTR ((uint32_t *)NULL)
453 #define	SYSCTL_U32(parent, nbr, name, access, ptr, val, descr)	\
454 	SYSCTL_OID(parent, nbr, name,				\
455 	    CTLTYPE_U32 | CTLFLAG_MPSAFE | (access),		\
456 	    ptr, val, sysctl_handle_32, "IU", descr);		\
457 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
458 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U32) && \
459 	    sizeof(uint32_t) == sizeof(*(ptr)))
460 
461 #define	SYSCTL_ADD_U32(ctx, parent, nbr, name, access, ptr, val, descr)	\
462 ({									\
463 	uint32_t *__ptr = (ptr);					\
464 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
465 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U32);		\
466 	sysctl_add_oid(ctx, parent, nbr, name,				\
467 	    CTLTYPE_U32 | CTLFLAG_MPSAFE | (access),			\
468 	    __ptr, val, sysctl_handle_32, "IU", __DESCR(descr));	\
469 })
470 
471 /* Oid for a signed 64-bit int.  If ptr is NULL, val is returned. */
472 #define	SYSCTL_NULL_S64_PTR ((int64_t *)NULL)
473 #define	SYSCTL_S64(parent, nbr, name, access, ptr, val, descr)	\
474 	SYSCTL_OID(parent, nbr, name,				\
475 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),		\
476 	    ptr, val, sysctl_handle_64, "Q", descr);		\
477 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
478 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64) && \
479 	    sizeof(int64_t) == sizeof(*(ptr)))
480 
481 #define	SYSCTL_ADD_S64(ctx, parent, nbr, name, access, ptr, val, descr)	\
482 ({									\
483 	int64_t *__ptr = (ptr);						\
484 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
485 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);		\
486 	sysctl_add_oid(ctx, parent, nbr, name,				\
487 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),			\
488 	    __ptr, val, sysctl_handle_64, "Q", __DESCR(descr));	\
489 })
490 
491 /* Oid for an unsigned 64-bit int.  If ptr is NULL, val is returned. */
492 #define	SYSCTL_NULL_U64_PTR ((uint64_t *)NULL)
493 #define	SYSCTL_U64(parent, nbr, name, access, ptr, val, descr)	\
494 	SYSCTL_OID(parent, nbr, name,				\
495 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),		\
496 	    ptr, val, sysctl_handle_64, "QU", descr);		\
497 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
498 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) && \
499 	    sizeof(uint64_t) == sizeof(*(ptr)))
500 
501 #define	SYSCTL_ADD_U64(ctx, parent, nbr, name, access, ptr, val, descr)	\
502 ({									\
503 	uint64_t *__ptr = (ptr);					\
504 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
505 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);		\
506 	sysctl_add_oid(ctx, parent, nbr, name,				\
507 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
508 	    __ptr, val, sysctl_handle_64, "QU", __DESCR(descr));	\
509 })
510 
511 /* Oid for an int.  If ptr is SYSCTL_NULL_INT_PTR, val is returned. */
512 #define	SYSCTL_NULL_INT_PTR ((int *)NULL)
513 #define	SYSCTL_INT(parent, nbr, name, access, ptr, val, descr)	\
514 	SYSCTL_OID(parent, nbr, name,				\
515 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),		\
516 	    ptr, val, sysctl_handle_int, "I", descr);		\
517 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
518 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT) && \
519 	    sizeof(int) == sizeof(*(ptr)))
520 
521 #define	SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)	\
522 ({									\
523 	int *__ptr = (ptr);						\
524 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
525 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
526 	sysctl_add_oid(ctx, parent, nbr, name,				\
527 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),			\
528 	    __ptr, val, sysctl_handle_int, "I", __DESCR(descr));	\
529 })
530 
531 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
532 #define	SYSCTL_NULL_UINT_PTR ((unsigned *)NULL)
533 #define	SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr)	\
534 	SYSCTL_OID(parent, nbr, name,				\
535 	    CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),		\
536 	    ptr, val, sysctl_handle_int, "IU", descr);		\
537 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
538 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT) && \
539 	    sizeof(unsigned) == sizeof(*(ptr)))
540 
541 #define	SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \
542 ({									\
543 	unsigned *__ptr = (ptr);					\
544 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
545 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_UINT);	\
546 	sysctl_add_oid(ctx, parent, nbr, name,				\
547 	    CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),			\
548 	    __ptr, val, sysctl_handle_int, "IU", __DESCR(descr));	\
549 })
550 
551 /* Oid for a long.  The pointer must be non NULL. */
552 #define	SYSCTL_NULL_LONG_PTR ((long *)NULL)
553 #define	SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr)	\
554 	SYSCTL_OID(parent, nbr, name,				\
555 	    CTLTYPE_LONG | CTLFLAG_MPSAFE | (access),		\
556 	    ptr, val, sysctl_handle_long, "L", descr);		\
557 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
558 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG) && \
559 	    sizeof(long) == sizeof(*(ptr)))
560 
561 #define	SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)	\
562 ({									\
563 	long *__ptr = (ptr);						\
564 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
565 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_LONG);	\
566 	sysctl_add_oid(ctx, parent, nbr, name,				\
567 	    CTLTYPE_LONG | CTLFLAG_MPSAFE | (access),			\
568 	    __ptr, 0, sysctl_handle_long, "L", __DESCR(descr));		\
569 })
570 
571 /* Oid for an unsigned long.  The pointer must be non NULL. */
572 #define	SYSCTL_NULL_ULONG_PTR ((unsigned long *)NULL)
573 #define	SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr)	\
574 	SYSCTL_OID(parent, nbr, name,					\
575 	    CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access),			\
576 	    ptr, val, sysctl_handle_long, "LU", descr);			\
577 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
578 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG) &&	\
579 	    sizeof(unsigned long) == sizeof(*(ptr)))
580 
581 #define	SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)	\
582 ({									\
583 	unsigned long *__ptr = (ptr);					\
584 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
585 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_ULONG);	\
586 	sysctl_add_oid(ctx, parent, nbr, name,				\
587 	    CTLTYPE_ULONG | CTLFLAG_MPSAFE | (access),			\
588 	    __ptr, 0, sysctl_handle_long, "LU", __DESCR(descr));	\
589 })
590 
591 /* Oid for a quad.  The pointer must be non NULL. */
592 #define	SYSCTL_NULL_QUAD_PTR ((int64_t *)NULL)
593 #define	SYSCTL_QUAD(parent, nbr, name, access, ptr, val, descr)	\
594 	SYSCTL_OID(parent, nbr, name,				\
595 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),		\
596 	    ptr, val, sysctl_handle_64, "Q", descr);		\
597 	CTASSERT((((access) & CTLTYPE) == 0 ||			\
598 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64) && \
599 	    sizeof(int64_t) == sizeof(*(ptr)))
600 
601 #define	SYSCTL_ADD_QUAD(ctx, parent, nbr, name, access, ptr, descr)	\
602 ({									\
603 	int64_t *__ptr = (ptr);						\
604 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
605 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_S64);		\
606 	sysctl_add_oid(ctx, parent, nbr, name,				\
607 	    CTLTYPE_S64 | CTLFLAG_MPSAFE | (access),			\
608 	    __ptr, 0, sysctl_handle_64, "Q", __DESCR(descr));		\
609 })
610 
611 #define	SYSCTL_NULL_UQUAD_PTR ((uint64_t *)NULL)
612 #define	SYSCTL_UQUAD(parent, nbr, name, access, ptr, val, descr)	\
613 	SYSCTL_OID(parent, nbr, name,					\
614 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
615 	     ptr, val, sysctl_handle_64, "QU", descr);			\
616 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
617 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) &&	\
618 	    sizeof(uint64_t) == sizeof(*(ptr)))
619 
620 #define	SYSCTL_ADD_UQUAD(ctx, parent, nbr, name, access, ptr, descr)	\
621 ({									\
622 	uint64_t *__ptr = (ptr);					\
623 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
624 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);		\
625 	sysctl_add_oid(ctx, parent, nbr, name,				\
626 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
627 	    __ptr, 0, sysctl_handle_64, "QU", __DESCR(descr));		\
628 })
629 
630 /* Oid for a CPU dependent variable */
631 #define	SYSCTL_ADD_UAUTO(ctx, parent, nbr, name, access, ptr, descr)	\
632 ({									\
633 	struct sysctl_oid *__ret;					\
634 	CTASSERT((sizeof(uint64_t) == sizeof(*(ptr)) ||			\
635 	    sizeof(unsigned) == sizeof(*(ptr))) &&			\
636 	    ((access) & CTLTYPE) == 0);					\
637 	if (sizeof(uint64_t) == sizeof(*(ptr))) {			\
638 		__ret = sysctl_add_oid(ctx, parent, nbr, name,		\
639 		    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),		\
640 		    (ptr), 0, sysctl_handle_64, "QU",			\
641 		    __DESCR(descr));					\
642 	} else {							\
643 		__ret = sysctl_add_oid(ctx, parent, nbr, name,		\
644 		    CTLTYPE_UINT | CTLFLAG_MPSAFE | (access),		\
645 		    (ptr), 0, sysctl_handle_int, "IU",			\
646 		    __DESCR(descr));					\
647 	}								\
648 	__ret;								\
649 })
650 
651 /* Oid for a 64-bit unsigned counter(9).  The pointer must be non NULL. */
652 #define	SYSCTL_COUNTER_U64(parent, nbr, name, access, ptr, descr)	\
653 	SYSCTL_OID(parent, nbr, name,					\
654 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
655 	    (ptr), 0, sysctl_handle_counter_u64, "QU", descr);		\
656 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
657 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64) &&	\
658 	    sizeof(counter_u64_t) == sizeof(*(ptr)) &&			\
659 	    sizeof(uint64_t) == sizeof(**(ptr)))
660 
661 #define	SYSCTL_ADD_COUNTER_U64(ctx, parent, nbr, name, access, ptr, descr) \
662 ({									\
663 	counter_u64_t *__ptr = (ptr);					\
664 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
665 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_U64);		\
666 	sysctl_add_oid(ctx, parent, nbr, name,				\
667 	    CTLTYPE_U64 | CTLFLAG_MPSAFE | (access),			\
668 	    __ptr, 0, sysctl_handle_counter_u64, "QU", __DESCR(descr));	\
669 })
670 
671 /* Oid for an array of counter(9)s.  The pointer and length must be non zero. */
672 #define	SYSCTL_COUNTER_U64_ARRAY(parent, nbr, name, access, ptr, len, descr) \
673 	SYSCTL_OID(parent, nbr, name,					\
674 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),			\
675 	    (ptr), (len), sysctl_handle_counter_u64_array, "S", descr);	\
676 	CTASSERT((((access) & CTLTYPE) == 0 ||				\
677 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE) &&	\
678 	    sizeof(counter_u64_t) == sizeof(*(ptr)) &&			\
679 	    sizeof(uint64_t) == sizeof(**(ptr)))
680 
681 #define	SYSCTL_ADD_COUNTER_U64_ARRAY(ctx, parent, nbr, name, access,	\
682     ptr, len, descr)							\
683 ({									\
684 	counter_u64_t *__ptr = (ptr);					\
685 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
686 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);	\
687 	sysctl_add_oid(ctx, parent, nbr, name,				\
688 	    CTLTYPE_OPAQUE | CTLFLAG_MPSAFE | (access),			\
689 	    __ptr, len, sysctl_handle_counter_u64_array, "S",		\
690 	    __DESCR(descr));						\
691 })
692 
693 /* Oid for an opaque object.  Specified by a pointer and a length. */
694 #define	SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr)	\
695 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access),		\
696 	    ptr, len, sysctl_handle_opaque, fmt, descr);		\
697 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
698 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
699 
700 #define	SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)	\
701 ({									\
702 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
703 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);	\
704 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access),	\
705 	    ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr));	\
706 })
707 
708 /* Oid for a struct.  Specified by a pointer and a type. */
709 #define	SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr)	\
710 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access),		\
711 	    ptr, sizeof(struct type), sysctl_handle_opaque,		\
712 	    "S," #type, descr);						\
713 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
714 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE)
715 
716 #define	SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
717 ({									\
718 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
719 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_OPAQUE);	\
720 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access),	\
721 	    (ptr), sizeof(struct type),					\
722 	    sysctl_handle_opaque, "S," #type, __DESCR(descr));		\
723 })
724 
725 /* Oid for a procedure.  Specified by a pointer and an arg. */
726 #define	SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
727 	SYSCTL_OID(parent, nbr, name, (access),				\
728 	    ptr, arg, handler, fmt, descr);				\
729 	CTASSERT(((access) & CTLTYPE) != 0)
730 
731 #define	SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
732 ({									\
733 	CTASSERT(((access) & CTLTYPE) != 0);				\
734 	sysctl_add_oid(ctx, parent, nbr, name, (access),		\
735 	    (ptr), (arg), (handler), (fmt), __DESCR(descr));		\
736 })
737 
738 /* Oid to handle limits on uma(9) zone specified by pointer. */
739 #define	SYSCTL_UMA_MAX(parent, nbr, name, access, ptr, descr)	\
740 	SYSCTL_OID(parent, nbr, name,				\
741 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),		\
742 	    (ptr), 0, sysctl_handle_uma_zone_max, "I", descr);	\
743 	CTASSERT(((access) & CTLTYPE) == 0 ||			\
744 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
745 
746 #define	SYSCTL_ADD_UMA_MAX(ctx, parent, nbr, name, access, ptr, descr)	\
747 ({									\
748 	uma_zone_t __ptr = (ptr);					\
749 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
750 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
751 	sysctl_add_oid(ctx, parent, nbr, name,				\
752 	    CTLTYPE_INT | CTLFLAG_MPSAFE | (access),			\
753 	    __ptr, 0, sysctl_handle_uma_zone_max, "I", __DESCR(descr));	\
754 })
755 
756 /* Oid to obtain current use of uma(9) zone specified by pointer. */
757 #define	SYSCTL_UMA_CUR(parent, nbr, name, access, ptr, descr)		\
758 	SYSCTL_OID(parent, nbr, name,					\
759 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
760 	    (ptr), 0, sysctl_handle_uma_zone_cur, "I", descr);		\
761 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
762 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT)
763 
764 #define	SYSCTL_ADD_UMA_CUR(ctx, parent, nbr, name, access, ptr, descr)	\
765 ({									\
766 	uma_zone_t __ptr = (ptr);					\
767 	CTASSERT(((access) & CTLTYPE) == 0 ||				\
768 	    ((access) & SYSCTL_CT_ASSERT_MASK) == CTLTYPE_INT);		\
769 	sysctl_add_oid(ctx, parent, nbr, name,				\
770 	    CTLTYPE_INT | CTLFLAG_MPSAFE | CTLFLAG_RD | (access),	\
771 	    __ptr, 0, sysctl_handle_uma_zone_cur, "I", __DESCR(descr));	\
772 })
773 
774 /*
775  * A macro to generate a read-only sysctl to indicate the presence of optional
776  * kernel features.
777  */
778 #define	FEATURE(name, desc)						\
779 	SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD | CTLFLAG_CAPRD, \
780 	    SYSCTL_NULL_INT_PTR, 1, desc)
781 
782 #endif /* _KERNEL */
783 
784 /*
785  * Top-level identifiers
786  */
787 #define	CTL_UNSPEC	0		/* unused */
788 #define	CTL_KERN	1		/* "high kernel": proc, limits */
789 #define	CTL_VM		2		/* virtual memory */
790 #define	CTL_VFS		3		/* filesystem, mount type is next */
791 #define	CTL_NET		4		/* network, see socket.h */
792 #define	CTL_DEBUG	5		/* debugging parameters */
793 #define	CTL_HW		6		/* generic cpu/io */
794 #define	CTL_MACHDEP	7		/* machine dependent */
795 #define	CTL_USER	8		/* user-level */
796 #define	CTL_P1003_1B	9		/* POSIX 1003.1B */
797 
798 /*
799  * CTL_KERN identifiers
800  */
801 #define	KERN_OSTYPE		 1	/* string: system version */
802 #define	KERN_OSRELEASE		 2	/* string: system release */
803 #define	KERN_OSREV		 3	/* int: system revision */
804 #define	KERN_VERSION		 4	/* string: compile time info */
805 #define	KERN_MAXVNODES		 5	/* int: max vnodes */
806 #define	KERN_MAXPROC		 6	/* int: max processes */
807 #define	KERN_MAXFILES		 7	/* int: max open files */
808 #define	KERN_ARGMAX		 8	/* int: max arguments to exec */
809 #define	KERN_SECURELVL		 9	/* int: system security level */
810 #define	KERN_HOSTNAME		10	/* string: hostname */
811 #define	KERN_HOSTID		11	/* int: host identifier */
812 #define	KERN_CLOCKRATE		12	/* struct: struct clockrate */
813 #define	KERN_VNODE		13	/* struct: vnode structures */
814 #define	KERN_PROC		14	/* struct: process entries */
815 #define	KERN_FILE		15	/* struct: file entries */
816 #define	KERN_PROF		16	/* node: kernel profiling info */
817 #define	KERN_POSIX1		17	/* int: POSIX.1 version */
818 #define	KERN_NGROUPS		18	/* int: # of supplemental group ids */
819 #define	KERN_JOB_CONTROL	19	/* int: is job control available */
820 #define	KERN_SAVED_IDS		20	/* int: saved set-user/group-ID */
821 #define	KERN_BOOTTIME		21	/* struct: time kernel was booted */
822 #define	KERN_NISDOMAINNAME	22	/* string: YP domain name */
823 #define	KERN_UPDATEINTERVAL	23	/* int: update process sleep time */
824 #define	KERN_OSRELDATE		24	/* int: kernel release date */
825 #define	KERN_NTP_PLL		25	/* node: NTP PLL control */
826 #define	KERN_BOOTFILE		26	/* string: name of booted kernel */
827 #define	KERN_MAXFILESPERPROC	27	/* int: max open files per proc */
828 #define	KERN_MAXPROCPERUID	28	/* int: max processes per uid */
829 #define	KERN_DUMPDEV		29	/* struct cdev *: device to dump on */
830 #define	KERN_IPC		30	/* node: anything related to IPC */
831 #define	KERN_DUMMY		31	/* unused */
832 #define	KERN_PS_STRINGS		32	/* int: address of PS_STRINGS */
833 #define	KERN_USRSTACK		33	/* int: address of USRSTACK */
834 #define	KERN_LOGSIGEXIT		34	/* int: do we log sigexit procs? */
835 #define	KERN_IOV_MAX		35	/* int: value of UIO_MAXIOV */
836 #define	KERN_HOSTUUID		36	/* string: host UUID identifier */
837 #define	KERN_ARND		37	/* int: from arc4rand() */
838 #define	KERN_MAXPHYS		38	/* int: MAXPHYS value */
839 /*
840  * KERN_PROC subtypes
841  */
842 #define	KERN_PROC_ALL		0	/* everything */
843 #define	KERN_PROC_PID		1	/* by process id */
844 #define	KERN_PROC_PGRP		2	/* by process group id */
845 #define	KERN_PROC_SESSION	3	/* by session of pid */
846 #define	KERN_PROC_TTY		4	/* by controlling tty */
847 #define	KERN_PROC_UID		5	/* by effective uid */
848 #define	KERN_PROC_RUID		6	/* by real uid */
849 #define	KERN_PROC_ARGS		7	/* get/set arguments/proctitle */
850 #define	KERN_PROC_PROC		8	/* only return procs */
851 #define	KERN_PROC_SV_NAME	9	/* get syscall vector name */
852 #define	KERN_PROC_RGID		10	/* by real group id */
853 #define	KERN_PROC_GID		11	/* by effective group id */
854 #define	KERN_PROC_PATHNAME	12	/* path to executable */
855 #define	KERN_PROC_OVMMAP	13	/* Old VM map entries for process */
856 #define	KERN_PROC_OFILEDESC	14	/* Old file descriptors for process */
857 #define	KERN_PROC_KSTACK	15	/* Kernel stacks for process */
858 #define	KERN_PROC_INC_THREAD	0x10	/*
859 					 * modifier for pid, pgrp, tty,
860 					 * uid, ruid, gid, rgid and proc
861 					 * This effectively uses 16-31
862 					 */
863 #define	KERN_PROC_VMMAP		32	/* VM map entries for process */
864 #define	KERN_PROC_FILEDESC	33	/* File descriptors for process */
865 #define	KERN_PROC_GROUPS	34	/* process groups */
866 #define	KERN_PROC_ENV		35	/* get environment */
867 #define	KERN_PROC_AUXV		36	/* get ELF auxiliary vector */
868 #define	KERN_PROC_RLIMIT	37	/* process resource limits */
869 #define	KERN_PROC_PS_STRINGS	38	/* get ps_strings location */
870 #define	KERN_PROC_UMASK		39	/* process umask */
871 #define	KERN_PROC_OSREL		40	/* osreldate for process binary */
872 #define	KERN_PROC_SIGTRAMP	41	/* signal trampoline location */
873 #define	KERN_PROC_CWD		42	/* process current working directory */
874 #define	KERN_PROC_NFDS		43	/* number of open file descriptors */
875 
876 /*
877  * KERN_IPC identifiers
878  */
879 #define	KIPC_MAXSOCKBUF		1	/* int: max size of a socket buffer */
880 #define	KIPC_SOCKBUF_WASTE	2	/* int: wastage factor in sockbuf */
881 #define	KIPC_SOMAXCONN		3	/* int: max length of connection q */
882 #define	KIPC_MAX_LINKHDR	4	/* int: max length of link header */
883 #define	KIPC_MAX_PROTOHDR	5	/* int: max length of network header */
884 #define	KIPC_MAX_HDR		6	/* int: max total length of headers */
885 #define	KIPC_MAX_DATALEN	7	/* int: max length of data? */
886 
887 /*
888  * CTL_HW identifiers
889  */
890 #define	HW_MACHINE	 1		/* string: machine class */
891 #define	HW_MODEL	 2		/* string: specific machine model */
892 #define	HW_NCPU		 3		/* int: number of cpus */
893 #define	HW_BYTEORDER	 4		/* int: machine byte order */
894 #define	HW_PHYSMEM	 5		/* int: total memory */
895 #define	HW_USERMEM	 6		/* int: non-kernel memory */
896 #define	HW_PAGESIZE	 7		/* int: software page size */
897 #define	HW_DISKNAMES	 8		/* strings: disk drive names */
898 #define	HW_DISKSTATS	 9		/* struct: diskstats[] */
899 #define	HW_FLOATINGPT	10		/* int: has HW floating point? */
900 #define	HW_MACHINE_ARCH	11		/* string: machine architecture */
901 #define	HW_REALMEM	12		/* int: 'real' memory */
902 
903 /*
904  * CTL_USER definitions
905  */
906 #define	USER_CS_PATH		 1	/* string: _CS_PATH */
907 #define	USER_BC_BASE_MAX	 2	/* int: BC_BASE_MAX */
908 #define	USER_BC_DIM_MAX		 3	/* int: BC_DIM_MAX */
909 #define	USER_BC_SCALE_MAX	 4	/* int: BC_SCALE_MAX */
910 #define	USER_BC_STRING_MAX	 5	/* int: BC_STRING_MAX */
911 #define	USER_COLL_WEIGHTS_MAX	 6	/* int: COLL_WEIGHTS_MAX */
912 #define	USER_EXPR_NEST_MAX	 7	/* int: EXPR_NEST_MAX */
913 #define	USER_LINE_MAX		 8	/* int: LINE_MAX */
914 #define	USER_RE_DUP_MAX		 9	/* int: RE_DUP_MAX */
915 #define	USER_POSIX2_VERSION	10	/* int: POSIX2_VERSION */
916 #define	USER_POSIX2_C_BIND	11	/* int: POSIX2_C_BIND */
917 #define	USER_POSIX2_C_DEV	12	/* int: POSIX2_C_DEV */
918 #define	USER_POSIX2_CHAR_TERM	13	/* int: POSIX2_CHAR_TERM */
919 #define	USER_POSIX2_FORT_DEV	14	/* int: POSIX2_FORT_DEV */
920 #define	USER_POSIX2_FORT_RUN	15	/* int: POSIX2_FORT_RUN */
921 #define	USER_POSIX2_LOCALEDEF	16	/* int: POSIX2_LOCALEDEF */
922 #define	USER_POSIX2_SW_DEV	17	/* int: POSIX2_SW_DEV */
923 #define	USER_POSIX2_UPE		18	/* int: POSIX2_UPE */
924 #define	USER_STREAM_MAX		19	/* int: POSIX2_STREAM_MAX */
925 #define	USER_TZNAME_MAX		20	/* int: POSIX2_TZNAME_MAX */
926 
927 #define	CTL_P1003_1B_ASYNCHRONOUS_IO		1	/* boolean */
928 #define	CTL_P1003_1B_MAPPED_FILES		2	/* boolean */
929 #define	CTL_P1003_1B_MEMLOCK			3	/* boolean */
930 #define	CTL_P1003_1B_MEMLOCK_RANGE		4	/* boolean */
931 #define	CTL_P1003_1B_MEMORY_PROTECTION		5	/* boolean */
932 #define	CTL_P1003_1B_MESSAGE_PASSING		6	/* boolean */
933 #define	CTL_P1003_1B_PRIORITIZED_IO		7	/* boolean */
934 #define	CTL_P1003_1B_PRIORITY_SCHEDULING	8	/* boolean */
935 #define	CTL_P1003_1B_REALTIME_SIGNALS		9	/* boolean */
936 #define	CTL_P1003_1B_SEMAPHORES			10	/* boolean */
937 #define	CTL_P1003_1B_FSYNC			11	/* boolean */
938 #define	CTL_P1003_1B_SHARED_MEMORY_OBJECTS	12	/* boolean */
939 #define	CTL_P1003_1B_SYNCHRONIZED_IO		13	/* boolean */
940 #define	CTL_P1003_1B_TIMERS			14	/* boolean */
941 #define	CTL_P1003_1B_AIO_LISTIO_MAX		15	/* int */
942 #define	CTL_P1003_1B_AIO_MAX			16	/* int */
943 #define	CTL_P1003_1B_AIO_PRIO_DELTA_MAX		17	/* int */
944 #define	CTL_P1003_1B_DELAYTIMER_MAX		18	/* int */
945 #define	CTL_P1003_1B_MQ_OPEN_MAX		19	/* int */
946 #define	CTL_P1003_1B_PAGESIZE			20	/* int */
947 #define	CTL_P1003_1B_RTSIG_MAX			21	/* int */
948 #define	CTL_P1003_1B_SEM_NSEMS_MAX		22	/* int */
949 #define	CTL_P1003_1B_SEM_VALUE_MAX		23	/* int */
950 #define	CTL_P1003_1B_SIGQUEUE_MAX		24	/* int */
951 #define	CTL_P1003_1B_TIMER_MAX			25	/* int */
952 
953 #define	CTL_P1003_1B_MAXID		26
954 
955 #ifdef _KERNEL
956 
957 /*
958  * Declare some common oids.
959  */
960 extern struct sysctl_oid_list sysctl__children;
961 SYSCTL_DECL(_kern);
962 SYSCTL_DECL(_kern_features);
963 SYSCTL_DECL(_kern_ipc);
964 SYSCTL_DECL(_kern_proc);
965 SYSCTL_DECL(_kern_sched);
966 SYSCTL_DECL(_kern_sched_stats);
967 SYSCTL_DECL(_sysctl);
968 SYSCTL_DECL(_vm);
969 SYSCTL_DECL(_vm_stats);
970 SYSCTL_DECL(_vm_stats_misc);
971 SYSCTL_DECL(_vfs);
972 SYSCTL_DECL(_net);
973 SYSCTL_DECL(_debug);
974 SYSCTL_DECL(_debug_sizeof);
975 SYSCTL_DECL(_dev);
976 SYSCTL_DECL(_hw);
977 SYSCTL_DECL(_hw_bus);
978 SYSCTL_DECL(_hw_bus_devices);
979 SYSCTL_DECL(_hw_bus_info);
980 SYSCTL_DECL(_machdep);
981 SYSCTL_DECL(_user);
982 SYSCTL_DECL(_compat);
983 SYSCTL_DECL(_regression);
984 SYSCTL_DECL(_security);
985 SYSCTL_DECL(_security_bsd);
986 
987 extern char	machine[];
988 extern char	osrelease[];
989 extern char	ostype[];
990 extern char	kern_ident[];
991 
992 /* Dynamic oid handling */
993 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
994 	    struct sysctl_oid_list *parent, int nbr, const char *name, int kind,
995 	    void *arg1, intmax_t arg2, int (*handler)(SYSCTL_HANDLER_ARGS),
996 	    const char *fmt, const char *descr);
997 int	sysctl_remove_name(struct sysctl_oid *parent, const char *name, int del,
998 	    int recurse);
999 void	sysctl_rename_oid(struct sysctl_oid *oidp, const char *name);
1000 int	sysctl_move_oid(struct sysctl_oid *oidp,
1001 	    struct sysctl_oid_list *parent);
1002 int	sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
1003 int	sysctl_ctx_init(struct sysctl_ctx_list *clist);
1004 int	sysctl_ctx_free(struct sysctl_ctx_list *clist);
1005 struct	sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
1006 	    struct sysctl_oid *oidp);
1007 struct	sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
1008 	    struct sysctl_oid *oidp);
1009 int	sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
1010 	    struct sysctl_oid *oidp);
1011 
1012 int	kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
1013 	    size_t *oldlenp, void *new, size_t newlen, size_t *retval,
1014 	    int flags);
1015 int	kernel_sysctlbyname(struct thread *td, char *name, void *old,
1016 	    size_t *oldlenp, void *new, size_t newlen, size_t *retval,
1017 	    int flags);
1018 int	userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
1019 	    size_t *oldlenp, int inkernel, void *new, size_t newlen,
1020 	    size_t *retval, int flags);
1021 int	sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
1022 	    int *nindx, struct sysctl_req *req);
1023 void	sysctl_wlock(void);
1024 void	sysctl_wunlock(void);
1025 int	sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
1026 
1027 struct sbuf;
1028 struct sbuf *sbuf_new_for_sysctl(struct sbuf *, char *, int,
1029 	    struct sysctl_req *);
1030 #else	/* !_KERNEL */
1031 #include <sys/cdefs.h>
1032 
1033 __BEGIN_DECLS
1034 int	sysctl(const int *, u_int, void *, size_t *, const void *, size_t);
1035 int	sysctlbyname(const char *, void *, size_t *, const void *, size_t);
1036 int	sysctlnametomib(const char *, int *, size_t *);
1037 __END_DECLS
1038 #endif	/* _KERNEL */
1039 
1040 #endif	/* !_SYS_SYSCTL_H_ */
1041