xref: /freebsd/sys/sys/sysctl.h (revision 282a3889ebf826db9839be296ff1dd903f6d6d6e)
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_QUAD	4	/* name describes a 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 
76 #define CTLFLAG_RD	0x80000000	/* Allow reads of variable */
77 #define CTLFLAG_WR	0x40000000	/* Allow writes to the variable */
78 #define CTLFLAG_RW	(CTLFLAG_RD|CTLFLAG_WR)
79 #define CTLFLAG_NOLOCK	0x20000000	/* XXX Don't Lock */
80 #define CTLFLAG_ANYBODY	0x10000000	/* All users can set this var */
81 #define CTLFLAG_SECURE	0x08000000	/* Permit set only if securelevel<=0 */
82 #define CTLFLAG_PRISON	0x04000000	/* Prisoned roots can fiddle */
83 #define CTLFLAG_DYN	0x02000000	/* Dynamic oid - can be freed */
84 #define CTLFLAG_SKIP	0x01000000	/* Skip this sysctl when listing */
85 #define CTLMASK_SECURE	0x00F00000	/* Secure level */
86 #define CTLFLAG_TUN	0x00080000	/* Tunable variable */
87 #define CTLFLAG_RDTUN	(CTLFLAG_RD|CTLFLAG_TUN)
88 
89 /*
90  * Secure level.   Note that CTLFLAG_SECURE == CTLFLAG_SECURE1.
91  *
92  * Secure when the securelevel is raised to at least N.
93  */
94 #define CTLSHIFT_SECURE	20
95 #define CTLFLAG_SECURE1	(CTLFLAG_SECURE | (0 << CTLSHIFT_SECURE))
96 #define CTLFLAG_SECURE2	(CTLFLAG_SECURE | (1 << CTLSHIFT_SECURE))
97 #define CTLFLAG_SECURE3	(CTLFLAG_SECURE | (2 << CTLSHIFT_SECURE))
98 
99 /*
100  * USE THIS instead of a hardwired number from the categories below
101  * to get dynamically assigned sysctl entries using the linker-set
102  * technology. This is the way nearly all new sysctl variables should
103  * be implemented.
104  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
105  */
106 #define OID_AUTO	(-1)
107 
108 /*
109  * The starting number for dynamically-assigned entries.  WARNING!
110  * ALL static sysctl entries should have numbers LESS than this!
111  */
112 #define CTL_AUTO_START	0x100
113 
114 #ifdef _KERNEL
115 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \
116 	struct sysctl_req *req
117 
118 /* definitions for sysctl_req 'lock' member */
119 #define REQ_UNLOCKED	0	/* not locked and not wired */
120 #define REQ_LOCKED	1	/* locked and not wired */
121 #define REQ_WIRED	2	/* locked and wired */
122 
123 /* definitions for sysctl_req 'flags' member */
124 #if defined(__amd64__) || defined(__ia64__)
125 #define	SCTL_MASK32	1	/* 32 bit emulation */
126 #endif
127 
128 /*
129  * This describes the access space for a sysctl request.  This is needed
130  * so that we can use the interface from the kernel or from user-space.
131  */
132 struct sysctl_req {
133 	struct thread	*td;		/* used for access checking */
134 	int		lock;		/* locking/wiring state */
135 	void		*oldptr;
136 	size_t		oldlen;
137 	size_t		oldidx;
138 	int		(*oldfunc)(struct sysctl_req *, const void *, size_t);
139 	void		*newptr;
140 	size_t		newlen;
141 	size_t		newidx;
142 	int		(*newfunc)(struct sysctl_req *, void *, size_t);
143 	size_t		validlen;
144 	int		flags;
145 };
146 
147 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
148 
149 /*
150  * This describes one "oid" in the MIB tree.  Potentially more nodes can
151  * be hidden behind it, expanded by the handler.
152  */
153 struct sysctl_oid {
154 	struct sysctl_oid_list *oid_parent;
155 	SLIST_ENTRY(sysctl_oid) oid_link;
156 	int		oid_number;
157 	u_int		oid_kind;
158 	void		*oid_arg1;
159 	int		oid_arg2;
160 	const char	*oid_name;
161 	int 		(*oid_handler)(SYSCTL_HANDLER_ARGS);
162 	const char	*oid_fmt;
163 	int		oid_refcnt;
164 	const char	*oid_descr;
165 };
166 
167 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
168 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
169 
170 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
171 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
172 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
173 int sysctl_handle_quad(SYSCTL_HANDLER_ARGS);
174 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
175 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
176 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
177 
178 /*
179  * These functions are used to add/remove an oid from the mib.
180  */
181 void sysctl_register_oid(struct sysctl_oid *oidp);
182 void sysctl_unregister_oid(struct sysctl_oid *oidp);
183 
184 /* Declare a static oid to allow child oids to be added to it. */
185 #define SYSCTL_DECL(name)					\
186 	extern struct sysctl_oid_list sysctl_##name##_children
187 
188 /* Hide these in macros */
189 #define	SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
190 	(oid_ptr)->oid_arg1
191 #define	SYSCTL_CHILDREN_SET(oid_ptr, val) \
192 	(oid_ptr)->oid_arg1 = (val);
193 #define	SYSCTL_STATIC_CHILDREN(oid_name) \
194 	(&sysctl_##oid_name##_children)
195 
196 /* === Structs and macros related to context handling === */
197 
198 /* All dynamically created sysctls can be tracked in a context list. */
199 struct sysctl_ctx_entry {
200 	struct sysctl_oid *entry;
201 	TAILQ_ENTRY(sysctl_ctx_entry) link;
202 };
203 
204 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
205 
206 #define SYSCTL_NODE_CHILDREN(parent, name) \
207 	sysctl_##parent##_##name##_children
208 
209 #ifndef NO_SYSCTL_DESCR
210 #define __DESCR(d) d
211 #else
212 #define __DESCR(d) ""
213 #endif
214 
215 /* This constructs a "raw" MIB oid. */
216 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
217 	static struct sysctl_oid sysctl__##parent##_##name = {		 \
218 		&sysctl_##parent##_children, { 0 },			 \
219 		nbr, kind, a1, a2, #name, handler, fmt, 0, __DESCR(descr) }; \
220 	DATA_SET(sysctl_set, sysctl__##parent##_##name)
221 
222 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
223 	sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
224 
225 /* This constructs a node from which other oids can hang. */
226 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)		    \
227 	struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name);	    \
228 	SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access),		    \
229 		   (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, \
230 		   "N", descr)
231 
232 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)	    \
233 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access),	    \
234 	0, 0, handler, "N", __DESCR(descr))
235 
236 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
237 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
238 	SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \
239 		arg, len, sysctl_handle_string, "A", descr)
240 
241 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \
242 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access),	    \
243 	arg, len, sysctl_handle_string, "A", __DESCR(descr))
244 
245 /* Oid for an int.  If ptr is NULL, val is returned. */
246 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
247 	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|(access), \
248 		ptr, val, sysctl_handle_int, "I", descr)
249 
250 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)	    \
251 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|(access),	    \
252 	ptr, val, sysctl_handle_int, "I", __DESCR(descr))
253 
254 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
255 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
256 	SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|(access), \
257 		ptr, val, sysctl_handle_int, "IU", descr)
258 
259 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
260 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|(access),	    \
261 	ptr, val, sysctl_handle_int, "IU", __DESCR(descr))
262 
263 #define SYSCTL_XINT(parent, nbr, name, access, ptr, val, descr) \
264 	SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|(access), \
265 		ptr, val, sysctl_handle_int, "IX", descr)
266 
267 #define SYSCTL_ADD_XINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
268 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|(access),	    \
269 	ptr, val, sysctl_handle_int, "IX", __DESCR(descr))
270 
271 /* Oid for a long.  The pointer must be non NULL. */
272 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
273 	SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|(access), \
274 		ptr, val, sysctl_handle_long, "L", descr)
275 
276 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)	    \
277 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|(access),	    \
278 	ptr, 0, sysctl_handle_long, "L", __DESCR(descr))
279 
280 /* Oid for an unsigned long.  The pointer must be non NULL. */
281 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
282 	SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|(access), \
283 		ptr, val, sysctl_handle_long, "LU", __DESCR(descr))
284 
285 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)	    \
286 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|(access),	    \
287 	ptr, 0, sysctl_handle_long, "LU", __DESCR(descr))
288 
289 #define SYSCTL_XLONG(parent, nbr, name, access, ptr, val, descr) \
290 	SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|(access), \
291 		ptr, val, sysctl_handle_long, "LX", __DESCR(descr))
292 
293 #define SYSCTL_ADD_XLONG(ctx, parent, nbr, name, access, ptr, descr)	    \
294 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|(access),	    \
295 	ptr, 0, sysctl_handle_long, "LX", __DESCR(descr))
296 
297 /* Oid for an opaque object.  Specified by a pointer and a length. */
298 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
299 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
300 		ptr, len, sysctl_handle_opaque, fmt, descr)
301 
302 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\
303 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access),	    \
304 	ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr))
305 
306 /* Oid for a struct.  Specified by a pointer and a type. */
307 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
308 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
309 		ptr, sizeof(struct type), sysctl_handle_opaque, \
310 		"S," #type, descr)
311 
312 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
313 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access),	    \
314 	ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, __DESCR(descr))
315 
316 /* Oid for a procedure.  Specified by a pointer and an arg. */
317 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
318 	SYSCTL_OID(parent, nbr, name, (access), \
319 		ptr, arg, handler, fmt, descr)
320 
321 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
322 	sysctl_add_oid(ctx, parent, nbr, name, (access),			    \
323 	ptr, arg, handler, fmt, __DESCR(descr))
324 
325 #endif /* _KERNEL */
326 
327 /*
328  * Top-level identifiers
329  */
330 #define	CTL_UNSPEC	0		/* unused */
331 #define	CTL_KERN	1		/* "high kernel": proc, limits */
332 #define	CTL_VM		2		/* virtual memory */
333 #define	CTL_VFS		3		/* filesystem, mount type is next */
334 #define	CTL_NET		4		/* network, see socket.h */
335 #define	CTL_DEBUG	5		/* debugging parameters */
336 #define	CTL_HW		6		/* generic cpu/io */
337 #define	CTL_MACHDEP	7		/* machine dependent */
338 #define	CTL_USER	8		/* user-level */
339 #define	CTL_P1003_1B	9		/* POSIX 1003.1B */
340 #define	CTL_MAXID	10		/* number of valid top-level ids */
341 
342 #define CTL_NAMES { \
343 	{ 0, 0 }, \
344 	{ "kern", CTLTYPE_NODE }, \
345 	{ "vm", CTLTYPE_NODE }, \
346 	{ "vfs", CTLTYPE_NODE }, \
347 	{ "net", CTLTYPE_NODE }, \
348 	{ "debug", CTLTYPE_NODE }, \
349 	{ "hw", CTLTYPE_NODE }, \
350 	{ "machdep", CTLTYPE_NODE }, \
351 	{ "user", CTLTYPE_NODE }, \
352 	{ "p1003_1b", CTLTYPE_NODE }, \
353 }
354 
355 /*
356  * CTL_KERN identifiers
357  */
358 #define	KERN_OSTYPE	 	 1	/* string: system version */
359 #define	KERN_OSRELEASE	 	 2	/* string: system release */
360 #define	KERN_OSREV	 	 3	/* int: system revision */
361 #define	KERN_VERSION	 	 4	/* string: compile time info */
362 #define	KERN_MAXVNODES	 	 5	/* int: max vnodes */
363 #define	KERN_MAXPROC	 	 6	/* int: max processes */
364 #define	KERN_MAXFILES	 	 7	/* int: max open files */
365 #define	KERN_ARGMAX	 	 8	/* int: max arguments to exec */
366 #define	KERN_SECURELVL	 	 9	/* int: system security level */
367 #define	KERN_HOSTNAME		10	/* string: hostname */
368 #define	KERN_HOSTID		11	/* int: host identifier */
369 #define	KERN_CLOCKRATE		12	/* struct: struct clockrate */
370 #define	KERN_VNODE		13	/* struct: vnode structures */
371 #define	KERN_PROC		14	/* struct: process entries */
372 #define	KERN_FILE		15	/* struct: file entries */
373 #define	KERN_PROF		16	/* node: kernel profiling info */
374 #define	KERN_POSIX1		17	/* int: POSIX.1 version */
375 #define	KERN_NGROUPS		18	/* int: # of supplemental group ids */
376 #define	KERN_JOB_CONTROL	19	/* int: is job control available */
377 #define	KERN_SAVED_IDS		20	/* int: saved set-user/group-ID */
378 #define	KERN_BOOTTIME		21	/* struct: time kernel was booted */
379 #define KERN_NISDOMAINNAME	22	/* string: YP domain name */
380 #define KERN_UPDATEINTERVAL	23	/* int: update process sleep time */
381 #define KERN_OSRELDATE		24	/* int: kernel release date */
382 #define KERN_NTP_PLL		25	/* node: NTP PLL control */
383 #define	KERN_BOOTFILE		26	/* string: name of booted kernel */
384 #define	KERN_MAXFILESPERPROC	27	/* int: max open files per proc */
385 #define	KERN_MAXPROCPERUID 	28	/* int: max processes per uid */
386 #define KERN_DUMPDEV		29	/* struct cdev *: device to dump on */
387 #define	KERN_IPC		30	/* node: anything related to IPC */
388 #define	KERN_DUMMY		31	/* unused */
389 #define	KERN_PS_STRINGS		32	/* int: address of PS_STRINGS */
390 #define	KERN_USRSTACK		33	/* int: address of USRSTACK */
391 #define	KERN_LOGSIGEXIT		34	/* int: do we log sigexit procs? */
392 #define	KERN_IOV_MAX		35	/* int: value of UIO_MAXIOV */
393 #define	KERN_HOSTUUID		36	/* string: host UUID identifier */
394 #define	KERN_ARND		37	/* int: from arc4rand() */
395 #define	KERN_MAXID		38	/* number of valid kern ids */
396 
397 #define CTL_KERN_NAMES { \
398 	{ 0, 0 }, \
399 	{ "ostype", CTLTYPE_STRING }, \
400 	{ "osrelease", CTLTYPE_STRING }, \
401 	{ "osrevision", CTLTYPE_INT }, \
402 	{ "version", CTLTYPE_STRING }, \
403 	{ "maxvnodes", CTLTYPE_INT }, \
404 	{ "maxproc", CTLTYPE_INT }, \
405 	{ "maxfiles", CTLTYPE_INT }, \
406 	{ "argmax", CTLTYPE_INT }, \
407 	{ "securelevel", CTLTYPE_INT }, \
408 	{ "hostname", CTLTYPE_STRING }, \
409 	{ "hostid", CTLTYPE_UINT }, \
410 	{ "clockrate", CTLTYPE_STRUCT }, \
411 	{ "vnode", CTLTYPE_STRUCT }, \
412 	{ "proc", CTLTYPE_STRUCT }, \
413 	{ "file", CTLTYPE_STRUCT }, \
414 	{ "profiling", CTLTYPE_NODE }, \
415 	{ "posix1version", CTLTYPE_INT }, \
416 	{ "ngroups", CTLTYPE_INT }, \
417 	{ "job_control", CTLTYPE_INT }, \
418 	{ "saved_ids", CTLTYPE_INT }, \
419 	{ "boottime", CTLTYPE_STRUCT }, \
420 	{ "nisdomainname", CTLTYPE_STRING }, \
421 	{ "update", CTLTYPE_INT }, \
422 	{ "osreldate", CTLTYPE_INT }, \
423 	{ "ntp_pll", CTLTYPE_NODE }, \
424 	{ "bootfile", CTLTYPE_STRING }, \
425 	{ "maxfilesperproc", CTLTYPE_INT }, \
426 	{ "maxprocperuid", CTLTYPE_INT }, \
427 	{ "ipc", CTLTYPE_NODE }, \
428 	{ "dummy", CTLTYPE_INT }, \
429 	{ "ps_strings", CTLTYPE_INT }, \
430 	{ "usrstack", CTLTYPE_INT }, \
431 	{ "logsigexit", CTLTYPE_INT }, \
432 	{ "iov_max", CTLTYPE_INT }, \
433 	{ "hostuuid", CTLTYPE_STRING }, \
434 }
435 
436 /*
437  * CTL_VFS identifiers
438  */
439 #define CTL_VFS_NAMES { \
440 	{ "vfsconf", CTLTYPE_STRUCT }, \
441 }
442 
443 /*
444  * KERN_PROC subtypes
445  */
446 #define KERN_PROC_ALL		0	/* everything */
447 #define	KERN_PROC_PID		1	/* by process id */
448 #define	KERN_PROC_PGRP		2	/* by process group id */
449 #define	KERN_PROC_SESSION	3	/* by session of pid */
450 #define	KERN_PROC_TTY		4	/* by controlling tty */
451 #define	KERN_PROC_UID		5	/* by effective uid */
452 #define	KERN_PROC_RUID		6	/* by real uid */
453 #define	KERN_PROC_ARGS		7	/* get/set arguments/proctitle */
454 #define	KERN_PROC_PROC		8	/* only return procs */
455 #define	KERN_PROC_SV_NAME	9	/* get syscall vector name */
456 #define	KERN_PROC_RGID		10	/* by real group id */
457 #define	KERN_PROC_GID		11	/* by effective group id */
458 #define	KERN_PROC_PATHNAME	12	/* path to executable */
459 #define	KERN_PROC_INC_THREAD	0x10	/*
460 					 * modifier for pid, pgrp, tty,
461 					 * uid, ruid, gid, rgid and proc
462 					 */
463 
464 /*
465  * KERN_IPC identifiers
466  */
467 #define KIPC_MAXSOCKBUF		1	/* int: max size of a socket buffer */
468 #define	KIPC_SOCKBUF_WASTE	2	/* int: wastage factor in sockbuf */
469 #define	KIPC_SOMAXCONN		3	/* int: max length of connection q */
470 #define	KIPC_MAX_LINKHDR	4	/* int: max length of link header */
471 #define	KIPC_MAX_PROTOHDR	5	/* int: max length of network header */
472 #define	KIPC_MAX_HDR		6	/* int: max total length of headers */
473 #define	KIPC_MAX_DATALEN	7	/* int: max length of data? */
474 
475 /*
476  * CTL_HW identifiers
477  */
478 #define	HW_MACHINE	 1		/* string: machine class */
479 #define	HW_MODEL	 2		/* string: specific machine model */
480 #define	HW_NCPU		 3		/* int: number of cpus */
481 #define	HW_BYTEORDER	 4		/* int: machine byte order */
482 #define	HW_PHYSMEM	 5		/* int: total memory */
483 #define	HW_USERMEM	 6		/* int: non-kernel memory */
484 #define	HW_PAGESIZE	 7		/* int: software page size */
485 #define	HW_DISKNAMES	 8		/* strings: disk drive names */
486 #define	HW_DISKSTATS	 9		/* struct: diskstats[] */
487 #define HW_FLOATINGPT	10		/* int: has HW floating point? */
488 #define HW_MACHINE_ARCH	11		/* string: machine architecture */
489 #define	HW_REALMEM	12		/* int: 'real' memory */
490 #define	HW_MAXID	13		/* number of valid hw ids */
491 
492 #define CTL_HW_NAMES { \
493 	{ 0, 0 }, \
494 	{ "machine", CTLTYPE_STRING }, \
495 	{ "model", CTLTYPE_STRING }, \
496 	{ "ncpu", CTLTYPE_INT }, \
497 	{ "byteorder", CTLTYPE_INT }, \
498 	{ "physmem", CTLTYPE_ULONG }, \
499 	{ "usermem", CTLTYPE_ULONG }, \
500 	{ "pagesize", CTLTYPE_INT }, \
501 	{ "disknames", CTLTYPE_STRUCT }, \
502 	{ "diskstats", CTLTYPE_STRUCT }, \
503 	{ "floatingpoint", CTLTYPE_INT }, \
504 	{ "realmem", CTLTYPE_ULONG }, \
505 }
506 
507 /*
508  * CTL_USER definitions
509  */
510 #define	USER_CS_PATH		 1	/* string: _CS_PATH */
511 #define	USER_BC_BASE_MAX	 2	/* int: BC_BASE_MAX */
512 #define	USER_BC_DIM_MAX		 3	/* int: BC_DIM_MAX */
513 #define	USER_BC_SCALE_MAX	 4	/* int: BC_SCALE_MAX */
514 #define	USER_BC_STRING_MAX	 5	/* int: BC_STRING_MAX */
515 #define	USER_COLL_WEIGHTS_MAX	 6	/* int: COLL_WEIGHTS_MAX */
516 #define	USER_EXPR_NEST_MAX	 7	/* int: EXPR_NEST_MAX */
517 #define	USER_LINE_MAX		 8	/* int: LINE_MAX */
518 #define	USER_RE_DUP_MAX		 9	/* int: RE_DUP_MAX */
519 #define	USER_POSIX2_VERSION	10	/* int: POSIX2_VERSION */
520 #define	USER_POSIX2_C_BIND	11	/* int: POSIX2_C_BIND */
521 #define	USER_POSIX2_C_DEV	12	/* int: POSIX2_C_DEV */
522 #define	USER_POSIX2_CHAR_TERM	13	/* int: POSIX2_CHAR_TERM */
523 #define	USER_POSIX2_FORT_DEV	14	/* int: POSIX2_FORT_DEV */
524 #define	USER_POSIX2_FORT_RUN	15	/* int: POSIX2_FORT_RUN */
525 #define	USER_POSIX2_LOCALEDEF	16	/* int: POSIX2_LOCALEDEF */
526 #define	USER_POSIX2_SW_DEV	17	/* int: POSIX2_SW_DEV */
527 #define	USER_POSIX2_UPE		18	/* int: POSIX2_UPE */
528 #define	USER_STREAM_MAX		19	/* int: POSIX2_STREAM_MAX */
529 #define	USER_TZNAME_MAX		20	/* int: POSIX2_TZNAME_MAX */
530 #define	USER_MAXID		21	/* number of valid user ids */
531 
532 #define	CTL_USER_NAMES { \
533 	{ 0, 0 }, \
534 	{ "cs_path", CTLTYPE_STRING }, \
535 	{ "bc_base_max", CTLTYPE_INT }, \
536 	{ "bc_dim_max", CTLTYPE_INT }, \
537 	{ "bc_scale_max", CTLTYPE_INT }, \
538 	{ "bc_string_max", CTLTYPE_INT }, \
539 	{ "coll_weights_max", CTLTYPE_INT }, \
540 	{ "expr_nest_max", CTLTYPE_INT }, \
541 	{ "line_max", CTLTYPE_INT }, \
542 	{ "re_dup_max", CTLTYPE_INT }, \
543 	{ "posix2_version", CTLTYPE_INT }, \
544 	{ "posix2_c_bind", CTLTYPE_INT }, \
545 	{ "posix2_c_dev", CTLTYPE_INT }, \
546 	{ "posix2_char_term", CTLTYPE_INT }, \
547 	{ "posix2_fort_dev", CTLTYPE_INT }, \
548 	{ "posix2_fort_run", CTLTYPE_INT }, \
549 	{ "posix2_localedef", CTLTYPE_INT }, \
550 	{ "posix2_sw_dev", CTLTYPE_INT }, \
551 	{ "posix2_upe", CTLTYPE_INT }, \
552 	{ "stream_max", CTLTYPE_INT }, \
553 	{ "tzname_max", CTLTYPE_INT }, \
554 }
555 
556 #define CTL_P1003_1B_ASYNCHRONOUS_IO		1	/* boolean */
557 #define CTL_P1003_1B_MAPPED_FILES		2	/* boolean */
558 #define CTL_P1003_1B_MEMLOCK			3	/* boolean */
559 #define CTL_P1003_1B_MEMLOCK_RANGE		4	/* boolean */
560 #define CTL_P1003_1B_MEMORY_PROTECTION		5	/* boolean */
561 #define CTL_P1003_1B_MESSAGE_PASSING		6	/* boolean */
562 #define CTL_P1003_1B_PRIORITIZED_IO		7	/* boolean */
563 #define CTL_P1003_1B_PRIORITY_SCHEDULING	8	/* boolean */
564 #define CTL_P1003_1B_REALTIME_SIGNALS		9	/* boolean */
565 #define CTL_P1003_1B_SEMAPHORES			10	/* boolean */
566 #define CTL_P1003_1B_FSYNC			11	/* boolean */
567 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS	12	/* boolean */
568 #define CTL_P1003_1B_SYNCHRONIZED_IO		13	/* boolean */
569 #define CTL_P1003_1B_TIMERS			14	/* boolean */
570 #define CTL_P1003_1B_AIO_LISTIO_MAX		15	/* int */
571 #define CTL_P1003_1B_AIO_MAX			16	/* int */
572 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX		17	/* int */
573 #define CTL_P1003_1B_DELAYTIMER_MAX		18	/* int */
574 #define CTL_P1003_1B_MQ_OPEN_MAX		19	/* int */
575 #define CTL_P1003_1B_PAGESIZE			20	/* int */
576 #define CTL_P1003_1B_RTSIG_MAX			21	/* int */
577 #define CTL_P1003_1B_SEM_NSEMS_MAX		22	/* int */
578 #define CTL_P1003_1B_SEM_VALUE_MAX		23	/* int */
579 #define CTL_P1003_1B_SIGQUEUE_MAX		24	/* int */
580 #define CTL_P1003_1B_TIMER_MAX			25	/* int */
581 
582 #define CTL_P1003_1B_MAXID		26
583 
584 #define	CTL_P1003_1B_NAMES { \
585 	{ 0, 0 }, \
586 	{ "asynchronous_io", CTLTYPE_INT }, \
587 	{ "mapped_files", CTLTYPE_INT }, \
588 	{ "memlock", CTLTYPE_INT }, \
589 	{ "memlock_range", CTLTYPE_INT }, \
590 	{ "memory_protection", CTLTYPE_INT }, \
591 	{ "message_passing", CTLTYPE_INT }, \
592 	{ "prioritized_io", CTLTYPE_INT }, \
593 	{ "priority_scheduling", CTLTYPE_INT }, \
594 	{ "realtime_signals", CTLTYPE_INT }, \
595 	{ "semaphores", CTLTYPE_INT }, \
596 	{ "fsync", CTLTYPE_INT }, \
597 	{ "shared_memory_objects", CTLTYPE_INT }, \
598 	{ "synchronized_io", CTLTYPE_INT }, \
599 	{ "timers", CTLTYPE_INT }, \
600 	{ "aio_listio_max", CTLTYPE_INT }, \
601 	{ "aio_max", CTLTYPE_INT }, \
602 	{ "aio_prio_delta_max", CTLTYPE_INT }, \
603 	{ "delaytimer_max", CTLTYPE_INT }, \
604 	{ "mq_open_max", CTLTYPE_INT }, \
605 	{ "pagesize", CTLTYPE_INT }, \
606 	{ "rtsig_max", CTLTYPE_INT }, \
607 	{ "nsems_max", CTLTYPE_INT }, \
608 	{ "sem_value_max", CTLTYPE_INT }, \
609 	{ "sigqueue_max", CTLTYPE_INT }, \
610 	{ "timer_max", CTLTYPE_INT }, \
611 }
612 
613 #ifdef _KERNEL
614 
615 /*
616  * Declare some common oids.
617  */
618 extern struct sysctl_oid_list sysctl__children;
619 SYSCTL_DECL(_kern);
620 SYSCTL_DECL(_kern_ipc);
621 SYSCTL_DECL(_sysctl);
622 SYSCTL_DECL(_vm);
623 SYSCTL_DECL(_vm_stats);
624 SYSCTL_DECL(_vm_stats_misc);
625 SYSCTL_DECL(_vfs);
626 SYSCTL_DECL(_net);
627 SYSCTL_DECL(_debug);
628 SYSCTL_DECL(_debug_sizeof);
629 SYSCTL_DECL(_hw);
630 SYSCTL_DECL(_hw_bus);
631 SYSCTL_DECL(_machdep);
632 SYSCTL_DECL(_user);
633 SYSCTL_DECL(_compat);
634 SYSCTL_DECL(_regression);
635 SYSCTL_DECL(_security);
636 SYSCTL_DECL(_security_bsd);
637 
638 extern char	machine[];
639 extern char	osrelease[];
640 extern char	ostype[];
641 extern char	kern_ident[];
642 
643 /* Dynamic oid handling */
644 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
645 		struct sysctl_oid_list *parent, int nbr, const char *name,
646 		int kind, void *arg1, int arg2,
647 		int (*handler) (SYSCTL_HANDLER_ARGS),
648 		const char *fmt, const char *descr);
649 int	sysctl_move_oid(struct sysctl_oid *oidp,
650 		struct sysctl_oid_list *parent);
651 int	sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
652 int	sysctl_ctx_init(struct sysctl_ctx_list *clist);
653 int	sysctl_ctx_free(struct sysctl_ctx_list *clist);
654 struct	sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
655 		struct sysctl_oid *oidp);
656 struct	sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
657 		struct sysctl_oid *oidp);
658 int	sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
659 		struct sysctl_oid *oidp);
660 
661 int	kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
662 		      size_t *oldlenp, void *new, size_t newlen,
663 		      size_t *retval, int flags);
664 int	kernel_sysctlbyname(struct thread *td, char *name,
665 		void *old, size_t *oldlenp, void *new, size_t newlen,
666 		size_t *retval, int flags);
667 int	userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
668 			size_t *oldlenp, int inkernel, void *new, size_t newlen,
669 			size_t *retval, int flags);
670 int	sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
671 			int *nindx, struct sysctl_req *req);
672 int	sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
673 
674 #else	/* !_KERNEL */
675 #include <sys/cdefs.h>
676 
677 __BEGIN_DECLS
678 int	sysctl(int *, u_int, void *, size_t *, void *, size_t);
679 int	sysctlbyname(const char *, void *, size_t *, void *, size_t);
680 int	sysctlnametomib(const char *, int *, size_t *);
681 __END_DECLS
682 #endif	/* _KERNEL */
683 
684 #endif	/* !_SYS_SYSCTL_H_ */
685