xref: /freebsd/sys/sys/sysctl.h (revision 6990ffd8a95caaba6858ad44ff1b3157d1efba8f)
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  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *	This product includes software developed by the University of
19  *	California, Berkeley and its contributors.
20  * 4. Neither the name of the University nor the names of its contributors
21  *    may be used to endorse or promote products derived from this software
22  *    without specific prior written permission.
23  *
24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34  * SUCH DAMAGE.
35  *
36  *	@(#)sysctl.h	8.1 (Berkeley) 6/2/93
37  * $FreeBSD$
38  */
39 
40 #ifndef _SYS_SYSCTL_H_
41 #define	_SYS_SYSCTL_H_
42 
43 #include <sys/_posix.h>
44 #include <sys/queue.h>
45 
46 struct thread;
47 /*
48  * Definitions for sysctl call.  The sysctl call uses a hierarchical name
49  * for objects that can be examined or modified.  The name is expressed as
50  * a sequence of integers.  Like a file path name, the meaning of each
51  * component depends on its place in the hierarchy.  The top-level and kern
52  * identifiers are defined here, and other identifiers are defined in the
53  * respective subsystem header files.
54  */
55 
56 #define CTL_MAXNAME	12	/* largest number of components supported */
57 
58 /*
59  * Each subsystem defined by sysctl defines a list of variables
60  * for that subsystem. Each name is either a node with further
61  * levels defined below it, or it is a leaf of some particular
62  * type given below. Each sysctl level defines a set of name/type
63  * pairs to be used by sysctl(1) in manipulating the subsystem.
64  */
65 struct ctlname {
66 	char	*ctl_name;	/* subsystem name */
67 	int	ctl_type;	/* type of name */
68 };
69 
70 #define CTLTYPE		0xf	/* Mask for the type */
71 #define	CTLTYPE_NODE	1	/* name is a node */
72 #define	CTLTYPE_INT	2	/* name describes an integer */
73 #define	CTLTYPE_STRING	3	/* name describes a string */
74 #define	CTLTYPE_QUAD	4	/* name describes a 64-bit number */
75 #define	CTLTYPE_OPAQUE	5	/* name describes a structure */
76 #define	CTLTYPE_STRUCT	CTLTYPE_OPAQUE	/* name describes a structure */
77 #define	CTLTYPE_UINT	6	/* name describes an unsigned integer */
78 #define	CTLTYPE_LONG	7	/* name describes a long */
79 #define	CTLTYPE_ULONG	8	/* name describes an unsigned long */
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_NOLOCK	0x20000000	/* XXX Don't Lock */
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 
90 /*
91  * USE THIS instead of a hardwired number from the categories below
92  * to get dynamically assigned sysctl entries using the linker-set
93  * technology. This is the way nearly all new sysctl variables should
94  * be implemented.
95  * e.g. SYSCTL_INT(_parent, OID_AUTO, name, CTLFLAG_RW, &variable, 0, "");
96  */
97 #define OID_AUTO	(-1)
98 
99 /*
100  * The starting number for dynamically-assigned entries.  WARNING!
101  * ALL static sysctl entries should have numbers LESS than this!
102  */
103 #define CTL_AUTO_START	0x100
104 
105 #ifdef _KERNEL
106 #define SYSCTL_HANDLER_ARGS struct sysctl_oid *oidp, void *arg1, int arg2, \
107 	struct sysctl_req *req
108 
109 /*
110  * This describes the access space for a sysctl request.  This is needed
111  * so that we can use the interface from the kernel or from user-space.
112  */
113 struct sysctl_req {
114 	struct proc	*p;		/* used for access checking */
115 	int		lock;
116 	void		*oldptr;
117 	size_t		oldlen;
118 	size_t		oldidx;
119 	int		(*oldfunc)(struct sysctl_req *, const void *, size_t);
120 	void		*newptr;
121 	size_t		newlen;
122 	size_t		newidx;
123 	int		(*newfunc)(struct sysctl_req *, void *, size_t);
124 };
125 
126 SLIST_HEAD(sysctl_oid_list, sysctl_oid);
127 
128 /*
129  * This describes one "oid" in the MIB tree.  Potentially more nodes can
130  * be hidden behind it, expanded by the handler.
131  */
132 struct sysctl_oid {
133 	struct sysctl_oid_list *oid_parent;
134 	SLIST_ENTRY(sysctl_oid) oid_link;
135 	int		oid_number;
136 	int		oid_kind;
137 	void		*oid_arg1;
138 	int		oid_arg2;
139 	const char	*oid_name;
140 	int 		(*oid_handler)(SYSCTL_HANDLER_ARGS);
141 	const char	*oid_fmt;
142 	int		oid_refcnt;
143 };
144 
145 #define SYSCTL_IN(r, p, l) (r->newfunc)(r, p, l)
146 #define SYSCTL_OUT(r, p, l) (r->oldfunc)(r, p, l)
147 
148 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
149 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
150 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
151 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
152 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
153 
154 /*
155  * These functions are used to add/remove an oid from the mib.
156  */
157 void sysctl_register_oid(struct sysctl_oid *oidp);
158 void sysctl_unregister_oid(struct sysctl_oid *oidp);
159 
160 /* Declare a static oid to allow child oids to be added to it. */
161 #define SYSCTL_DECL(name)					\
162 	extern struct sysctl_oid_list sysctl_##name##_children
163 
164 /* Hide these in macros */
165 #define	SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
166 	(oid_ptr)->oid_arg1
167 #define	SYSCTL_STATIC_CHILDREN(oid_name) \
168 	(&sysctl_##oid_name##_children)
169 
170 /* === Structs and macros related to context handling === */
171 
172 /* All dynamically created sysctls can be tracked in a context list. */
173 struct sysctl_ctx_entry {
174 	struct sysctl_oid *entry;
175 	TAILQ_ENTRY(sysctl_ctx_entry) link;
176 };
177 
178 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
179 
180 /* This constructs a "raw" MIB oid. */
181 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
182 	static struct sysctl_oid sysctl__##parent##_##name = {		 \
183 		&sysctl_##parent##_children, { 0 },			 \
184 		nbr, kind, a1, a2, #name, handler, fmt, 0 };		 \
185 	DATA_SET(sysctl_set, sysctl__##parent##_##name);
186 
187 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
188 	sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr);
189 
190 /* This constructs a node from which other oids can hang. */
191 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr)		    \
192 	struct sysctl_oid_list sysctl_##parent##_##name##_children;	    \
193 	SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|access,		    \
194 		   (void*)&sysctl_##parent##_##name##_children, 0, handler, \
195 		   "N", descr);
196 
197 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr)	    \
198 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|access,	    \
199 	0, 0, handler, "N", descr);
200 
201 /* Oid for a string.  len can be 0 to indicate '\0' termination. */
202 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
203 	SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|access, \
204 		arg, len, sysctl_handle_string, "A", descr)
205 
206 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr)  \
207 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|access,	    \
208 	arg, len, sysctl_handle_string, "A", descr);
209 
210 /* Oid for an int.  If ptr is NULL, val is returned. */
211 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
212 	SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|access, \
213 		ptr, val, sysctl_handle_int, "I", descr)
214 
215 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr)	    \
216 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|access,	    \
217 	ptr, val, sysctl_handle_int, "I", descr);
218 
219 /* Oid for an unsigned int.  If ptr is NULL, val is returned. */
220 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
221 	SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|access, \
222 		ptr, val, sysctl_handle_int, "IU", descr)
223 
224 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr)    \
225 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|access,	    \
226 	ptr, val, sysctl_handle_int, "IU", descr);
227 
228 /* Oid for a long.  The pointer must be non NULL. */
229 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
230 	SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|access, \
231 		ptr, val, sysctl_handle_long, "L", descr)
232 
233 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr)	    \
234 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|access,	    \
235 	ptr, 0, sysctl_handle_long, "L", descr);
236 
237 /* Oid for a long.  The pointer must be non NULL. */
238 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
239 	SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|access, \
240 		ptr, val, sysctl_handle_long, "LU", descr)
241 
242 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr)	    \
243 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|access,	    \
244 	ptr, 0, sysctl_handle_long, "LU", descr);
245 
246 /* Oid for an opaque object.  Specified by a pointer and a length. */
247 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
248 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
249 		ptr, len, sysctl_handle_opaque, fmt, descr)
250 
251 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\
252 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|access,	    \
253 	ptr, len, sysctl_handle_opaque, fmt, descr);
254 
255 /* Oid for a struct.  Specified by a pointer and a type. */
256 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
257 	SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|access, \
258 		ptr, sizeof(struct type), sysctl_handle_opaque, \
259 		"S," #type, descr)
260 
261 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
262 	sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|access,	    \
263 	ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, descr);
264 
265 /* Oid for a procedure.  Specified by a pointer and an arg. */
266 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
267 	SYSCTL_OID(parent, nbr, name, access, \
268 		ptr, arg, handler, fmt, descr)
269 
270 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
271 	sysctl_add_oid(ctx, parent, nbr, name, access,			    \
272 	ptr, arg, handler, fmt, descr);
273 
274 #endif /* _KERNEL */
275 
276 /*
277  * Top-level identifiers
278  */
279 #define	CTL_UNSPEC	0		/* unused */
280 #define	CTL_KERN	1		/* "high kernel": proc, limits */
281 #define	CTL_VM		2		/* virtual memory */
282 #define	CTL_VFS		3		/* file system, mount type is next */
283 #define	CTL_NET		4		/* network, see socket.h */
284 #define	CTL_DEBUG	5		/* debugging parameters */
285 #define	CTL_HW		6		/* generic cpu/io */
286 #define	CTL_MACHDEP	7		/* machine dependent */
287 #define	CTL_USER	8		/* user-level */
288 #define	CTL_P1003_1B	9		/* POSIX 1003.1B */
289 #define	CTL_MAXID	10		/* number of valid top-level ids */
290 
291 #define CTL_NAMES { \
292 	{ 0, 0 }, \
293 	{ "kern", CTLTYPE_NODE }, \
294 	{ "vm", CTLTYPE_NODE }, \
295 	{ "vfs", CTLTYPE_NODE }, \
296 	{ "net", CTLTYPE_NODE }, \
297 	{ "debug", CTLTYPE_NODE }, \
298 	{ "hw", CTLTYPE_NODE }, \
299 	{ "machdep", CTLTYPE_NODE }, \
300 	{ "user", CTLTYPE_NODE }, \
301 	{ "p1003_1b", CTLTYPE_NODE }, \
302 }
303 
304 /*
305  * CTL_KERN identifiers
306  */
307 #define	KERN_OSTYPE	 	 1	/* string: system version */
308 #define	KERN_OSRELEASE	 	 2	/* string: system release */
309 #define	KERN_OSREV	 	 3	/* int: system revision */
310 #define	KERN_VERSION	 	 4	/* string: compile time info */
311 #define	KERN_MAXVNODES	 	 5	/* int: max vnodes */
312 #define	KERN_MAXPROC	 	 6	/* int: max processes */
313 #define	KERN_MAXFILES	 	 7	/* int: max open files */
314 #define	KERN_ARGMAX	 	 8	/* int: max arguments to exec */
315 #define	KERN_SECURELVL	 	 9	/* int: system security level */
316 #define	KERN_HOSTNAME		10	/* string: hostname */
317 #define	KERN_HOSTID		11	/* int: host identifier */
318 #define	KERN_CLOCKRATE		12	/* struct: struct clockrate */
319 #define	KERN_VNODE		13	/* struct: vnode structures */
320 #define	KERN_PROC		14	/* struct: process entries */
321 #define	KERN_FILE		15	/* struct: file entries */
322 #define	KERN_PROF		16	/* node: kernel profiling info */
323 #define	KERN_POSIX1		17	/* int: POSIX.1 version */
324 #define	KERN_NGROUPS		18	/* int: # of supplemental group ids */
325 #define	KERN_JOB_CONTROL	19	/* int: is job control available */
326 #define	KERN_SAVED_IDS		20	/* int: saved set-user/group-ID */
327 #define	KERN_BOOTTIME		21	/* struct: time kernel was booted */
328 #define KERN_NISDOMAINNAME	22	/* string: YP domain name */
329 #define KERN_UPDATEINTERVAL	23	/* int: update process sleep time */
330 #define KERN_OSRELDATE		24	/* int: OS release date */
331 #define KERN_NTP_PLL		25	/* node: NTP PLL control */
332 #define	KERN_BOOTFILE		26	/* string: name of booted kernel */
333 #define	KERN_MAXFILESPERPROC	27	/* int: max open files per proc */
334 #define	KERN_MAXPROCPERUID 	28	/* int: max processes per uid */
335 #define KERN_DUMPDEV		29	/* dev_t: device to dump on */
336 #define	KERN_IPC		30	/* node: anything related to IPC */
337 #define	KERN_DUMMY		31	/* unused */
338 #define	KERN_PS_STRINGS		32	/* int: address of PS_STRINGS */
339 #define	KERN_USRSTACK		33	/* int: address of USRSTACK */
340 #define	KERN_LOGSIGEXIT		34	/* int: do we log sigexit procs? */
341 #define	KERN_IOV_MAX		35	/* int: value of UIO_MAXIOV */
342 #define KERN_MAXID		36      /* number of valid kern ids */
343 
344 #define CTL_KERN_NAMES { \
345 	{ 0, 0 }, \
346 	{ "ostype", CTLTYPE_STRING }, \
347 	{ "osrelease", CTLTYPE_STRING }, \
348 	{ "osrevision", CTLTYPE_INT }, \
349 	{ "version", CTLTYPE_STRING }, \
350 	{ "maxvnodes", CTLTYPE_INT }, \
351 	{ "maxproc", CTLTYPE_INT }, \
352 	{ "maxfiles", CTLTYPE_INT }, \
353 	{ "argmax", CTLTYPE_INT }, \
354 	{ "securelevel", CTLTYPE_INT }, \
355 	{ "hostname", CTLTYPE_STRING }, \
356 	{ "hostid", CTLTYPE_UINT }, \
357 	{ "clockrate", CTLTYPE_STRUCT }, \
358 	{ "vnode", CTLTYPE_STRUCT }, \
359 	{ "proc", CTLTYPE_STRUCT }, \
360 	{ "file", CTLTYPE_STRUCT }, \
361 	{ "profiling", CTLTYPE_NODE }, \
362 	{ "posix1version", CTLTYPE_INT }, \
363 	{ "ngroups", CTLTYPE_INT }, \
364 	{ "job_control", CTLTYPE_INT }, \
365 	{ "saved_ids", CTLTYPE_INT }, \
366 	{ "boottime", CTLTYPE_STRUCT }, \
367 	{ "nisdomainname", CTLTYPE_STRING }, \
368 	{ "update", CTLTYPE_INT }, \
369 	{ "osreldate", CTLTYPE_INT }, \
370 	{ "ntp_pll", CTLTYPE_NODE }, \
371 	{ "bootfile", CTLTYPE_STRING }, \
372 	{ "maxfilesperproc", CTLTYPE_INT }, \
373 	{ "maxprocperuid", CTLTYPE_INT }, \
374 	{ "dumpdev", CTLTYPE_STRUCT }, /* we lie; don't print as int */ \
375 	{ "ipc", CTLTYPE_NODE }, \
376 	{ "dummy", CTLTYPE_INT }, \
377 	{ "ps_strings", CTLTYPE_INT }, \
378 	{ "usrstack", CTLTYPE_INT }, \
379 	{ "logsigexit", CTLTYPE_INT }, \
380 	{ "iov_max", CTLTYPE_INT }, \
381 }
382 
383 /*
384  * CTL_VFS identifiers
385  */
386 #define CTL_VFS_NAMES { \
387 	{ "vfsconf", CTLTYPE_STRUCT }, \
388 }
389 
390 /*
391  * KERN_PROC subtypes
392  */
393 #define KERN_PROC_ALL		0	/* everything */
394 #define	KERN_PROC_PID		1	/* by process id */
395 #define	KERN_PROC_PGRP		2	/* by process group id */
396 #define	KERN_PROC_SESSION	3	/* by session of pid */
397 #define	KERN_PROC_TTY		4	/* by controlling tty */
398 #define	KERN_PROC_UID		5	/* by effective uid */
399 #define	KERN_PROC_RUID		6	/* by real uid */
400 #define	KERN_PROC_ARGS		7	/* get/set arguments/proctitle */
401 
402 /*
403  * KERN_IPC identifiers
404  */
405 #define KIPC_MAXSOCKBUF		1	/* int: max size of a socket buffer */
406 #define	KIPC_SOCKBUF_WASTE	2	/* int: wastage factor in sockbuf */
407 #define	KIPC_SOMAXCONN		3	/* int: max length of connection q */
408 #define	KIPC_MAX_LINKHDR	4	/* int: max length of link header */
409 #define	KIPC_MAX_PROTOHDR	5	/* int: max length of network header */
410 #define	KIPC_MAX_HDR		6	/* int: max total length of headers */
411 #define	KIPC_MAX_DATALEN	7	/* int: max length of data? */
412 
413 /*
414  * CTL_HW identifiers
415  */
416 #define	HW_MACHINE	 1		/* string: machine class */
417 #define	HW_MODEL	 2		/* string: specific machine model */
418 #define	HW_NCPU		 3		/* int: number of cpus */
419 #define	HW_BYTEORDER	 4		/* int: machine byte order */
420 #define	HW_PHYSMEM	 5		/* int: total memory */
421 #define	HW_USERMEM	 6		/* int: non-kernel memory */
422 #define	HW_PAGESIZE	 7		/* int: software page size */
423 #define	HW_DISKNAMES	 8		/* strings: disk drive names */
424 #define	HW_DISKSTATS	 9		/* struct: diskstats[] */
425 #define HW_FLOATINGPT	10		/* int: has HW floating point? */
426 #define HW_MACHINE_ARCH	11		/* string: machine architecture */
427 #define	HW_MAXID	12		/* number of valid hw ids */
428 
429 #define CTL_HW_NAMES { \
430 	{ 0, 0 }, \
431 	{ "machine", CTLTYPE_STRING }, \
432 	{ "model", CTLTYPE_STRING }, \
433 	{ "ncpu", CTLTYPE_INT }, \
434 	{ "byteorder", CTLTYPE_INT }, \
435 	{ "physmem", CTLTYPE_ULONG }, \
436 	{ "usermem", CTLTYPE_ULONG }, \
437 	{ "pagesize", CTLTYPE_INT }, \
438 	{ "disknames", CTLTYPE_STRUCT }, \
439 	{ "diskstats", CTLTYPE_STRUCT }, \
440 	{ "floatingpoint", CTLTYPE_INT }, \
441 }
442 
443 /*
444  * CTL_USER definitions
445  */
446 #define	USER_CS_PATH		 1	/* string: _CS_PATH */
447 #define	USER_BC_BASE_MAX	 2	/* int: BC_BASE_MAX */
448 #define	USER_BC_DIM_MAX		 3	/* int: BC_DIM_MAX */
449 #define	USER_BC_SCALE_MAX	 4	/* int: BC_SCALE_MAX */
450 #define	USER_BC_STRING_MAX	 5	/* int: BC_STRING_MAX */
451 #define	USER_COLL_WEIGHTS_MAX	 6	/* int: COLL_WEIGHTS_MAX */
452 #define	USER_EXPR_NEST_MAX	 7	/* int: EXPR_NEST_MAX */
453 #define	USER_LINE_MAX		 8	/* int: LINE_MAX */
454 #define	USER_RE_DUP_MAX		 9	/* int: RE_DUP_MAX */
455 #define	USER_POSIX2_VERSION	10	/* int: POSIX2_VERSION */
456 #define	USER_POSIX2_C_BIND	11	/* int: POSIX2_C_BIND */
457 #define	USER_POSIX2_C_DEV	12	/* int: POSIX2_C_DEV */
458 #define	USER_POSIX2_CHAR_TERM	13	/* int: POSIX2_CHAR_TERM */
459 #define	USER_POSIX2_FORT_DEV	14	/* int: POSIX2_FORT_DEV */
460 #define	USER_POSIX2_FORT_RUN	15	/* int: POSIX2_FORT_RUN */
461 #define	USER_POSIX2_LOCALEDEF	16	/* int: POSIX2_LOCALEDEF */
462 #define	USER_POSIX2_SW_DEV	17	/* int: POSIX2_SW_DEV */
463 #define	USER_POSIX2_UPE		18	/* int: POSIX2_UPE */
464 #define	USER_STREAM_MAX		19	/* int: POSIX2_STREAM_MAX */
465 #define	USER_TZNAME_MAX		20	/* int: POSIX2_TZNAME_MAX */
466 #define	USER_MAXID		21	/* number of valid user ids */
467 
468 #define	CTL_USER_NAMES { \
469 	{ 0, 0 }, \
470 	{ "cs_path", CTLTYPE_STRING }, \
471 	{ "bc_base_max", CTLTYPE_INT }, \
472 	{ "bc_dim_max", CTLTYPE_INT }, \
473 	{ "bc_scale_max", CTLTYPE_INT }, \
474 	{ "bc_string_max", CTLTYPE_INT }, \
475 	{ "coll_weights_max", CTLTYPE_INT }, \
476 	{ "expr_nest_max", CTLTYPE_INT }, \
477 	{ "line_max", CTLTYPE_INT }, \
478 	{ "re_dup_max", CTLTYPE_INT }, \
479 	{ "posix2_version", CTLTYPE_INT }, \
480 	{ "posix2_c_bind", CTLTYPE_INT }, \
481 	{ "posix2_c_dev", CTLTYPE_INT }, \
482 	{ "posix2_char_term", CTLTYPE_INT }, \
483 	{ "posix2_fort_dev", CTLTYPE_INT }, \
484 	{ "posix2_fort_run", CTLTYPE_INT }, \
485 	{ "posix2_localedef", CTLTYPE_INT }, \
486 	{ "posix2_sw_dev", CTLTYPE_INT }, \
487 	{ "posix2_upe", CTLTYPE_INT }, \
488 	{ "stream_max", CTLTYPE_INT }, \
489 	{ "tzname_max", CTLTYPE_INT }, \
490 }
491 
492 #define CTL_P1003_1B_ASYNCHRONOUS_IO		1	/* boolean */
493 #define CTL_P1003_1B_MAPPED_FILES		2	/* boolean */
494 #define CTL_P1003_1B_MEMLOCK			3	/* boolean */
495 #define CTL_P1003_1B_MEMLOCK_RANGE		4	/* boolean */
496 #define CTL_P1003_1B_MEMORY_PROTECTION		5	/* boolean */
497 #define CTL_P1003_1B_MESSAGE_PASSING		6	/* boolean */
498 #define CTL_P1003_1B_PRIORITIZED_IO		7	/* boolean */
499 #define CTL_P1003_1B_PRIORITY_SCHEDULING	8	/* boolean */
500 #define CTL_P1003_1B_REALTIME_SIGNALS		9	/* boolean */
501 #define CTL_P1003_1B_SEMAPHORES			10	/* boolean */
502 #define CTL_P1003_1B_FSYNC			11	/* boolean */
503 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS	12	/* boolean */
504 #define CTL_P1003_1B_SYNCHRONIZED_IO		13	/* boolean */
505 #define CTL_P1003_1B_TIMERS			14	/* boolean */
506 #define CTL_P1003_1B_AIO_LISTIO_MAX		15	/* int */
507 #define CTL_P1003_1B_AIO_MAX			16	/* int */
508 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX		17	/* int */
509 #define CTL_P1003_1B_DELAYTIMER_MAX		18	/* int */
510 #define CTL_P1003_1B_MQ_OPEN_MAX		19	/* int */
511 #define CTL_P1003_1B_PAGESIZE			20	/* int */
512 #define CTL_P1003_1B_RTSIG_MAX			21	/* int */
513 #define CTL_P1003_1B_SEM_NSEMS_MAX		22	/* int */
514 #define CTL_P1003_1B_SEM_VALUE_MAX		23	/* int */
515 #define CTL_P1003_1B_SIGQUEUE_MAX		24	/* int */
516 #define CTL_P1003_1B_TIMER_MAX			25	/* int */
517 
518 #define CTL_P1003_1B_MAXID		26
519 
520 #define	CTL_P1003_1B_NAMES { \
521 	{ 0, 0 }, \
522 	{ "asynchronous_io", CTLTYPE_INT }, \
523 	{ "mapped_files", CTLTYPE_INT }, \
524 	{ "memlock", CTLTYPE_INT }, \
525 	{ "memlock_range", CTLTYPE_INT }, \
526 	{ "memory_protection", CTLTYPE_INT }, \
527 	{ "message_passing", CTLTYPE_INT }, \
528 	{ "prioritized_io", CTLTYPE_INT }, \
529 	{ "priority_scheduling", CTLTYPE_INT }, \
530 	{ "realtime_signals", CTLTYPE_INT }, \
531 	{ "semaphores", CTLTYPE_INT }, \
532 	{ "fsync", CTLTYPE_INT }, \
533 	{ "shared_memory_objects", CTLTYPE_INT }, \
534 	{ "synchronized_io", CTLTYPE_INT }, \
535 	{ "timers", CTLTYPE_INT }, \
536 	{ "aio_listio_max", CTLTYPE_INT }, \
537 	{ "aio_max", CTLTYPE_INT }, \
538 	{ "aio_prio_delta_max", CTLTYPE_INT }, \
539 	{ "delaytimer_max", CTLTYPE_INT }, \
540 	{ "mq_open_max", CTLTYPE_INT }, \
541 	{ "pagesize", CTLTYPE_INT }, \
542 	{ "rtsig_max", CTLTYPE_INT }, \
543 	{ "nsems_max", CTLTYPE_INT }, \
544 	{ "sem_value_max", CTLTYPE_INT }, \
545 	{ "sigqueue_max", CTLTYPE_INT }, \
546 	{ "timer_max", CTLTYPE_INT }, \
547 }
548 
549 #ifdef _KERNEL
550 
551 /*
552  * Declare some common oids.
553  */
554 extern struct sysctl_oid_list sysctl__children;
555 SYSCTL_DECL(_kern);
556 SYSCTL_DECL(_sysctl);
557 SYSCTL_DECL(_vm);
558 SYSCTL_DECL(_vfs);
559 SYSCTL_DECL(_net);
560 SYSCTL_DECL(_debug);
561 SYSCTL_DECL(_hw);
562 SYSCTL_DECL(_machdep);
563 SYSCTL_DECL(_user);
564 SYSCTL_DECL(_compat);
565 
566 extern char	machine[];
567 extern char	osrelease[];
568 extern char	ostype[];
569 
570 /* Dynamic oid handling */
571 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
572 		struct sysctl_oid_list *parent, int nbr, const char *name,
573 		int kind, void *arg1, int arg2,
574 		int (*handler) (SYSCTL_HANDLER_ARGS),
575 		const char *fmt, const char *descr);
576 int	sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
577 int	sysctl_ctx_init(struct sysctl_ctx_list *clist);
578 int	sysctl_ctx_free(struct sysctl_ctx_list *clist);
579 struct	sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
580 		struct sysctl_oid *oidp);
581 struct	sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
582 		struct sysctl_oid *oidp);
583 int	sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
584 		struct sysctl_oid *oidp);
585 
586 int	kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
587 		      size_t *oldlenp, void *new, size_t newlen,
588 		      size_t *retval);
589 int	kernel_sysctlbyname(struct thread *td, char *name,
590 		void *old, size_t *oldlenp, void *new, size_t newlen,
591 		size_t *retval);
592 int	userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
593 			size_t *oldlenp, int inkernel, void *new, size_t newlen,
594 			size_t *retval);
595 int	sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
596 			int *nindx, struct sysctl_req *req);
597 
598 #else	/* !_KERNEL */
599 #include <sys/cdefs.h>
600 
601 __BEGIN_DECLS
602 int	sysctl __P((int *, u_int, void *, size_t *, void *, size_t));
603 int	sysctlbyname __P((const char *, void *, size_t *, void *, size_t));
604 int	sysctlnametomib __P((const char *, int *, size_t *));
605 __END_DECLS
606 #endif	/* _KERNEL */
607 
608 #endif	/* !_SYS_SYSCTL_H_ */
609