FreeBSD/Linux Kernel Cross Reference
sys/sys/sysctl.h
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: releng/6.4/sys/sys/sysctl.h 179979 2008-06-24 20:40:17Z jhb $
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_intptr(SYSCTL_HANDLER_ARGS);
174 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
175 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);
176
177 /*
178 * These functions are used to add/remove an oid from the mib.
179 */
180 void sysctl_register_oid(struct sysctl_oid *oidp);
181 void sysctl_unregister_oid(struct sysctl_oid *oidp);
182
183 /* Declare a static oid to allow child oids to be added to it. */
184 #define SYSCTL_DECL(name) \
185 extern struct sysctl_oid_list sysctl_##name##_children
186
187 /* Hide these in macros */
188 #define SYSCTL_CHILDREN(oid_ptr) (struct sysctl_oid_list *) \
189 (oid_ptr)->oid_arg1
190 #define SYSCTL_CHILDREN_SET(oid_ptr, val) \
191 (oid_ptr)->oid_arg1 = (val);
192 #define SYSCTL_STATIC_CHILDREN(oid_name) \
193 (&sysctl_##oid_name##_children)
194
195 /* === Structs and macros related to context handling === */
196
197 /* All dynamically created sysctls can be tracked in a context list. */
198 struct sysctl_ctx_entry {
199 struct sysctl_oid *entry;
200 TAILQ_ENTRY(sysctl_ctx_entry) link;
201 };
202
203 TAILQ_HEAD(sysctl_ctx_list, sysctl_ctx_entry);
204
205 #define SYSCTL_NODE_CHILDREN(parent, name) \
206 sysctl_##parent##_##name##_children
207
208 #ifndef NO_SYSCTL_DESCR
209 #define __DESCR(d) d
210 #else
211 #define __DESCR(d) ""
212 #endif
213
214 /* This constructs a "raw" MIB oid. */
215 #define SYSCTL_OID(parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
216 static struct sysctl_oid sysctl__##parent##_##name = { \
217 &sysctl_##parent##_children, { 0 }, \
218 nbr, kind, a1, a2, #name, handler, fmt, 0, __DESCR(descr) }; \
219 DATA_SET(sysctl_set, sysctl__##parent##_##name)
220
221 #define SYSCTL_ADD_OID(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, descr) \
222 sysctl_add_oid(ctx, parent, nbr, name, kind, a1, a2, handler, fmt, __DESCR(descr))
223
224 /* This constructs a node from which other oids can hang. */
225 #define SYSCTL_NODE(parent, nbr, name, access, handler, descr) \
226 struct sysctl_oid_list SYSCTL_NODE_CHILDREN(parent, name); \
227 SYSCTL_OID(parent, nbr, name, CTLTYPE_NODE|(access), \
228 (void*)&SYSCTL_NODE_CHILDREN(parent, name), 0, handler, \
229 "N", descr)
230
231 #define SYSCTL_ADD_NODE(ctx, parent, nbr, name, access, handler, descr) \
232 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_NODE|(access), \
233 0, 0, handler, "N", __DESCR(descr))
234
235 /* Oid for a string. len can be 0 to indicate '\0' termination. */
236 #define SYSCTL_STRING(parent, nbr, name, access, arg, len, descr) \
237 SYSCTL_OID(parent, nbr, name, CTLTYPE_STRING|(access), \
238 arg, len, sysctl_handle_string, "A", descr)
239
240 #define SYSCTL_ADD_STRING(ctx, parent, nbr, name, access, arg, len, descr) \
241 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_STRING|(access), \
242 arg, len, sysctl_handle_string, "A", __DESCR(descr))
243
244 /* Oid for an int. If ptr is NULL, val is returned. */
245 #define SYSCTL_INT(parent, nbr, name, access, ptr, val, descr) \
246 SYSCTL_OID(parent, nbr, name, CTLTYPE_INT|(access), \
247 ptr, val, sysctl_handle_int, "I", descr)
248
249 #define SYSCTL_ADD_INT(ctx, parent, nbr, name, access, ptr, val, descr) \
250 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_INT|(access), \
251 ptr, val, sysctl_handle_int, "I", __DESCR(descr))
252
253 /* Oid for an unsigned int. If ptr is NULL, val is returned. */
254 #define SYSCTL_UINT(parent, nbr, name, access, ptr, val, descr) \
255 SYSCTL_OID(parent, nbr, name, CTLTYPE_UINT|(access), \
256 ptr, val, sysctl_handle_int, "IU", descr)
257
258 #define SYSCTL_ADD_UINT(ctx, parent, nbr, name, access, ptr, val, descr) \
259 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_UINT|(access), \
260 ptr, val, sysctl_handle_int, "IU", __DESCR(descr))
261
262 /* Oid for a long. The pointer must be non NULL. */
263 #define SYSCTL_LONG(parent, nbr, name, access, ptr, val, descr) \
264 SYSCTL_OID(parent, nbr, name, CTLTYPE_LONG|(access), \
265 ptr, val, sysctl_handle_long, "L", descr)
266
267 #define SYSCTL_ADD_LONG(ctx, parent, nbr, name, access, ptr, descr) \
268 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_LONG|(access), \
269 ptr, 0, sysctl_handle_long, "L", __DESCR(descr))
270
271 /* Oid for an unsigned long. The pointer must be non NULL. */
272 #define SYSCTL_ULONG(parent, nbr, name, access, ptr, val, descr) \
273 SYSCTL_OID(parent, nbr, name, CTLTYPE_ULONG|(access), \
274 ptr, val, sysctl_handle_long, "LU", __DESCR(descr))
275
276 #define SYSCTL_ADD_ULONG(ctx, parent, nbr, name, access, ptr, descr) \
277 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_ULONG|(access), \
278 ptr, 0, sysctl_handle_long, "LU", __DESCR(descr))
279
280 /* Oid for an opaque object. Specified by a pointer and a length. */
281 #define SYSCTL_OPAQUE(parent, nbr, name, access, ptr, len, fmt, descr) \
282 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
283 ptr, len, sysctl_handle_opaque, fmt, descr)
284
285 #define SYSCTL_ADD_OPAQUE(ctx, parent, nbr, name, access, ptr, len, fmt, descr)\
286 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
287 ptr, len, sysctl_handle_opaque, fmt, __DESCR(descr))
288
289 /* Oid for a struct. Specified by a pointer and a type. */
290 #define SYSCTL_STRUCT(parent, nbr, name, access, ptr, type, descr) \
291 SYSCTL_OID(parent, nbr, name, CTLTYPE_OPAQUE|(access), \
292 ptr, sizeof(struct type), sysctl_handle_opaque, \
293 "S," #type, descr)
294
295 #define SYSCTL_ADD_STRUCT(ctx, parent, nbr, name, access, ptr, type, descr) \
296 sysctl_add_oid(ctx, parent, nbr, name, CTLTYPE_OPAQUE|(access), \
297 ptr, sizeof(struct type), sysctl_handle_opaque, "S," #type, __DESCR(descr))
298
299 /* Oid for a procedure. Specified by a pointer and an arg. */
300 #define SYSCTL_PROC(parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
301 SYSCTL_OID(parent, nbr, name, (access), \
302 ptr, arg, handler, fmt, descr)
303
304 #define SYSCTL_ADD_PROC(ctx, parent, nbr, name, access, ptr, arg, handler, fmt, descr) \
305 sysctl_add_oid(ctx, parent, nbr, name, (access), \
306 ptr, arg, handler, fmt, __DESCR(descr))
307
308 /*
309 * A macro to generate a read-only sysctl to indicate the presense of optional
310 * kernel features.
311 */
312 #define FEATURE(name, desc) \
313 SYSCTL_INT(_kern_features, OID_AUTO, name, CTLFLAG_RD, 0, 1, desc)
314
315 #endif /* _KERNEL */
316
317 /*
318 * Top-level identifiers
319 */
320 #define CTL_UNSPEC 0 /* unused */
321 #define CTL_KERN 1 /* "high kernel": proc, limits */
322 #define CTL_VM 2 /* virtual memory */
323 #define CTL_VFS 3 /* filesystem, mount type is next */
324 #define CTL_NET 4 /* network, see socket.h */
325 #define CTL_DEBUG 5 /* debugging parameters */
326 #define CTL_HW 6 /* generic cpu/io */
327 #define CTL_MACHDEP 7 /* machine dependent */
328 #define CTL_USER 8 /* user-level */
329 #define CTL_P1003_1B 9 /* POSIX 1003.1B */
330 #define CTL_MAXID 10 /* number of valid top-level ids */
331
332 #define CTL_NAMES { \
333 { 0, 0 }, \
334 { "kern", CTLTYPE_NODE }, \
335 { "vm", CTLTYPE_NODE }, \
336 { "vfs", CTLTYPE_NODE }, \
337 { "net", CTLTYPE_NODE }, \
338 { "debug", CTLTYPE_NODE }, \
339 { "hw", CTLTYPE_NODE }, \
340 { "machdep", CTLTYPE_NODE }, \
341 { "user", CTLTYPE_NODE }, \
342 { "p1003_1b", CTLTYPE_NODE }, \
343 }
344
345 /*
346 * CTL_KERN identifiers
347 */
348 #define KERN_OSTYPE 1 /* string: system version */
349 #define KERN_OSRELEASE 2 /* string: system release */
350 #define KERN_OSREV 3 /* int: system revision */
351 #define KERN_VERSION 4 /* string: compile time info */
352 #define KERN_MAXVNODES 5 /* int: max vnodes */
353 #define KERN_MAXPROC 6 /* int: max processes */
354 #define KERN_MAXFILES 7 /* int: max open files */
355 #define KERN_ARGMAX 8 /* int: max arguments to exec */
356 #define KERN_SECURELVL 9 /* int: system security level */
357 #define KERN_HOSTNAME 10 /* string: hostname */
358 #define KERN_HOSTID 11 /* int: host identifier */
359 #define KERN_CLOCKRATE 12 /* struct: struct clockrate */
360 #define KERN_VNODE 13 /* struct: vnode structures */
361 #define KERN_PROC 14 /* struct: process entries */
362 #define KERN_FILE 15 /* struct: file entries */
363 #define KERN_PROF 16 /* node: kernel profiling info */
364 #define KERN_POSIX1 17 /* int: POSIX.1 version */
365 #define KERN_NGROUPS 18 /* int: # of supplemental group ids */
366 #define KERN_JOB_CONTROL 19 /* int: is job control available */
367 #define KERN_SAVED_IDS 20 /* int: saved set-user/group-ID */
368 #define KERN_BOOTTIME 21 /* struct: time kernel was booted */
369 #define KERN_NISDOMAINNAME 22 /* string: YP domain name */
370 #define KERN_UPDATEINTERVAL 23 /* int: update process sleep time */
371 #define KERN_OSRELDATE 24 /* int: kernel release date */
372 #define KERN_NTP_PLL 25 /* node: NTP PLL control */
373 #define KERN_BOOTFILE 26 /* string: name of booted kernel */
374 #define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */
375 #define KERN_MAXPROCPERUID 28 /* int: max processes per uid */
376 #define KERN_DUMPDEV 29 /* struct cdev *: device to dump on */
377 #define KERN_IPC 30 /* node: anything related to IPC */
378 #define KERN_DUMMY 31 /* unused */
379 #define KERN_PS_STRINGS 32 /* int: address of PS_STRINGS */
380 #define KERN_USRSTACK 33 /* int: address of USRSTACK */
381 #define KERN_LOGSIGEXIT 34 /* int: do we log sigexit procs? */
382 #define KERN_IOV_MAX 35 /* int: value of UIO_MAXIOV */
383 #define KERN_MAXID 36 /* number of valid kern ids */
384
385 #define CTL_KERN_NAMES { \
386 { 0, 0 }, \
387 { "ostype", CTLTYPE_STRING }, \
388 { "osrelease", CTLTYPE_STRING }, \
389 { "osrevision", CTLTYPE_INT }, \
390 { "version", CTLTYPE_STRING }, \
391 { "maxvnodes", CTLTYPE_INT }, \
392 { "maxproc", CTLTYPE_INT }, \
393 { "maxfiles", CTLTYPE_INT }, \
394 { "argmax", CTLTYPE_INT }, \
395 { "securelevel", CTLTYPE_INT }, \
396 { "hostname", CTLTYPE_STRING }, \
397 { "hostid", CTLTYPE_UINT }, \
398 { "clockrate", CTLTYPE_STRUCT }, \
399 { "vnode", CTLTYPE_STRUCT }, \
400 { "proc", CTLTYPE_STRUCT }, \
401 { "file", CTLTYPE_STRUCT }, \
402 { "profiling", CTLTYPE_NODE }, \
403 { "posix1version", CTLTYPE_INT }, \
404 { "ngroups", CTLTYPE_INT }, \
405 { "job_control", CTLTYPE_INT }, \
406 { "saved_ids", CTLTYPE_INT }, \
407 { "boottime", CTLTYPE_STRUCT }, \
408 { "nisdomainname", CTLTYPE_STRING }, \
409 { "update", CTLTYPE_INT }, \
410 { "osreldate", CTLTYPE_INT }, \
411 { "ntp_pll", CTLTYPE_NODE }, \
412 { "bootfile", CTLTYPE_STRING }, \
413 { "maxfilesperproc", CTLTYPE_INT }, \
414 { "maxprocperuid", CTLTYPE_INT }, \
415 { "ipc", CTLTYPE_NODE }, \
416 { "dummy", CTLTYPE_INT }, \
417 { "ps_strings", CTLTYPE_INT }, \
418 { "usrstack", CTLTYPE_INT }, \
419 { "logsigexit", CTLTYPE_INT }, \
420 { "iov_max", CTLTYPE_INT }, \
421 }
422
423 /*
424 * CTL_VFS identifiers
425 */
426 #define CTL_VFS_NAMES { \
427 { "vfsconf", CTLTYPE_STRUCT }, \
428 }
429
430 /*
431 * KERN_PROC subtypes
432 */
433 #define KERN_PROC_ALL 0 /* everything */
434 #define KERN_PROC_PID 1 /* by process id */
435 #define KERN_PROC_PGRP 2 /* by process group id */
436 #define KERN_PROC_SESSION 3 /* by session of pid */
437 #define KERN_PROC_TTY 4 /* by controlling tty */
438 #define KERN_PROC_UID 5 /* by effective uid */
439 #define KERN_PROC_RUID 6 /* by real uid */
440 #define KERN_PROC_ARGS 7 /* get/set arguments/proctitle */
441 #define KERN_PROC_PROC 8 /* only return procs */
442 #define KERN_PROC_SV_NAME 9 /* get syscall vector name */
443 #define KERN_PROC_RGID 10 /* by real group id */
444 #define KERN_PROC_GID 11 /* by effective group id */
445 #define KERN_PROC_PATHNAME 12 /* path to executable */
446 #define KERN_PROC_INC_THREAD 0x10 /*
447 * modifier for pid, pgrp, tty,
448 * uid, ruid, gid, rgid and proc
449 */
450
451 /*
452 * KERN_IPC identifiers
453 */
454 #define KIPC_MAXSOCKBUF 1 /* int: max size of a socket buffer */
455 #define KIPC_SOCKBUF_WASTE 2 /* int: wastage factor in sockbuf */
456 #define KIPC_SOMAXCONN 3 /* int: max length of connection q */
457 #define KIPC_MAX_LINKHDR 4 /* int: max length of link header */
458 #define KIPC_MAX_PROTOHDR 5 /* int: max length of network header */
459 #define KIPC_MAX_HDR 6 /* int: max total length of headers */
460 #define KIPC_MAX_DATALEN 7 /* int: max length of data? */
461
462 /*
463 * CTL_HW identifiers
464 */
465 #define HW_MACHINE 1 /* string: machine class */
466 #define HW_MODEL 2 /* string: specific machine model */
467 #define HW_NCPU 3 /* int: number of cpus */
468 #define HW_BYTEORDER 4 /* int: machine byte order */
469 #define HW_PHYSMEM 5 /* int: total memory */
470 #define HW_USERMEM 6 /* int: non-kernel memory */
471 #define HW_PAGESIZE 7 /* int: software page size */
472 #define HW_DISKNAMES 8 /* strings: disk drive names */
473 #define HW_DISKSTATS 9 /* struct: diskstats[] */
474 #define HW_FLOATINGPT 10 /* int: has HW floating point? */
475 #define HW_MACHINE_ARCH 11 /* string: machine architecture */
476 #define HW_REALMEM 12 /* int: 'real' memory */
477 #define HW_MAXID 13 /* number of valid hw ids */
478
479 #define CTL_HW_NAMES { \
480 { 0, 0 }, \
481 { "machine", CTLTYPE_STRING }, \
482 { "model", CTLTYPE_STRING }, \
483 { "ncpu", CTLTYPE_INT }, \
484 { "byteorder", CTLTYPE_INT }, \
485 { "physmem", CTLTYPE_ULONG }, \
486 { "usermem", CTLTYPE_ULONG }, \
487 { "pagesize", CTLTYPE_INT }, \
488 { "disknames", CTLTYPE_STRUCT }, \
489 { "diskstats", CTLTYPE_STRUCT }, \
490 { "floatingpoint", CTLTYPE_INT }, \
491 { "realmem", CTLTYPE_ULONG }, \
492 }
493
494 /*
495 * CTL_USER definitions
496 */
497 #define USER_CS_PATH 1 /* string: _CS_PATH */
498 #define USER_BC_BASE_MAX 2 /* int: BC_BASE_MAX */
499 #define USER_BC_DIM_MAX 3 /* int: BC_DIM_MAX */
500 #define USER_BC_SCALE_MAX 4 /* int: BC_SCALE_MAX */
501 #define USER_BC_STRING_MAX 5 /* int: BC_STRING_MAX */
502 #define USER_COLL_WEIGHTS_MAX 6 /* int: COLL_WEIGHTS_MAX */
503 #define USER_EXPR_NEST_MAX 7 /* int: EXPR_NEST_MAX */
504 #define USER_LINE_MAX 8 /* int: LINE_MAX */
505 #define USER_RE_DUP_MAX 9 /* int: RE_DUP_MAX */
506 #define USER_POSIX2_VERSION 10 /* int: POSIX2_VERSION */
507 #define USER_POSIX2_C_BIND 11 /* int: POSIX2_C_BIND */
508 #define USER_POSIX2_C_DEV 12 /* int: POSIX2_C_DEV */
509 #define USER_POSIX2_CHAR_TERM 13 /* int: POSIX2_CHAR_TERM */
510 #define USER_POSIX2_FORT_DEV 14 /* int: POSIX2_FORT_DEV */
511 #define USER_POSIX2_FORT_RUN 15 /* int: POSIX2_FORT_RUN */
512 #define USER_POSIX2_LOCALEDEF 16 /* int: POSIX2_LOCALEDEF */
513 #define USER_POSIX2_SW_DEV 17 /* int: POSIX2_SW_DEV */
514 #define USER_POSIX2_UPE 18 /* int: POSIX2_UPE */
515 #define USER_STREAM_MAX 19 /* int: POSIX2_STREAM_MAX */
516 #define USER_TZNAME_MAX 20 /* int: POSIX2_TZNAME_MAX */
517 #define USER_MAXID 21 /* number of valid user ids */
518
519 #define CTL_USER_NAMES { \
520 { 0, 0 }, \
521 { "cs_path", CTLTYPE_STRING }, \
522 { "bc_base_max", CTLTYPE_INT }, \
523 { "bc_dim_max", CTLTYPE_INT }, \
524 { "bc_scale_max", CTLTYPE_INT }, \
525 { "bc_string_max", CTLTYPE_INT }, \
526 { "coll_weights_max", CTLTYPE_INT }, \
527 { "expr_nest_max", CTLTYPE_INT }, \
528 { "line_max", CTLTYPE_INT }, \
529 { "re_dup_max", CTLTYPE_INT }, \
530 { "posix2_version", CTLTYPE_INT }, \
531 { "posix2_c_bind", CTLTYPE_INT }, \
532 { "posix2_c_dev", CTLTYPE_INT }, \
533 { "posix2_char_term", CTLTYPE_INT }, \
534 { "posix2_fort_dev", CTLTYPE_INT }, \
535 { "posix2_fort_run", CTLTYPE_INT }, \
536 { "posix2_localedef", CTLTYPE_INT }, \
537 { "posix2_sw_dev", CTLTYPE_INT }, \
538 { "posix2_upe", CTLTYPE_INT }, \
539 { "stream_max", CTLTYPE_INT }, \
540 { "tzname_max", CTLTYPE_INT }, \
541 }
542
543 #define CTL_P1003_1B_ASYNCHRONOUS_IO 1 /* boolean */
544 #define CTL_P1003_1B_MAPPED_FILES 2 /* boolean */
545 #define CTL_P1003_1B_MEMLOCK 3 /* boolean */
546 #define CTL_P1003_1B_MEMLOCK_RANGE 4 /* boolean */
547 #define CTL_P1003_1B_MEMORY_PROTECTION 5 /* boolean */
548 #define CTL_P1003_1B_MESSAGE_PASSING 6 /* boolean */
549 #define CTL_P1003_1B_PRIORITIZED_IO 7 /* boolean */
550 #define CTL_P1003_1B_PRIORITY_SCHEDULING 8 /* boolean */
551 #define CTL_P1003_1B_REALTIME_SIGNALS 9 /* boolean */
552 #define CTL_P1003_1B_SEMAPHORES 10 /* boolean */
553 #define CTL_P1003_1B_FSYNC 11 /* boolean */
554 #define CTL_P1003_1B_SHARED_MEMORY_OBJECTS 12 /* boolean */
555 #define CTL_P1003_1B_SYNCHRONIZED_IO 13 /* boolean */
556 #define CTL_P1003_1B_TIMERS 14 /* boolean */
557 #define CTL_P1003_1B_AIO_LISTIO_MAX 15 /* int */
558 #define CTL_P1003_1B_AIO_MAX 16 /* int */
559 #define CTL_P1003_1B_AIO_PRIO_DELTA_MAX 17 /* int */
560 #define CTL_P1003_1B_DELAYTIMER_MAX 18 /* int */
561 #define CTL_P1003_1B_MQ_OPEN_MAX 19 /* int */
562 #define CTL_P1003_1B_PAGESIZE 20 /* int */
563 #define CTL_P1003_1B_RTSIG_MAX 21 /* int */
564 #define CTL_P1003_1B_SEM_NSEMS_MAX 22 /* int */
565 #define CTL_P1003_1B_SEM_VALUE_MAX 23 /* int */
566 #define CTL_P1003_1B_SIGQUEUE_MAX 24 /* int */
567 #define CTL_P1003_1B_TIMER_MAX 25 /* int */
568
569 #define CTL_P1003_1B_MAXID 26
570
571 #define CTL_P1003_1B_NAMES { \
572 { 0, 0 }, \
573 { "asynchronous_io", CTLTYPE_INT }, \
574 { "mapped_files", CTLTYPE_INT }, \
575 { "memlock", CTLTYPE_INT }, \
576 { "memlock_range", CTLTYPE_INT }, \
577 { "memory_protection", CTLTYPE_INT }, \
578 { "message_passing", CTLTYPE_INT }, \
579 { "prioritized_io", CTLTYPE_INT }, \
580 { "priority_scheduling", CTLTYPE_INT }, \
581 { "realtime_signals", CTLTYPE_INT }, \
582 { "semaphores", CTLTYPE_INT }, \
583 { "fsync", CTLTYPE_INT }, \
584 { "shared_memory_objects", CTLTYPE_INT }, \
585 { "synchronized_io", CTLTYPE_INT }, \
586 { "timers", CTLTYPE_INT }, \
587 { "aio_listio_max", CTLTYPE_INT }, \
588 { "aio_max", CTLTYPE_INT }, \
589 { "aio_prio_delta_max", CTLTYPE_INT }, \
590 { "delaytimer_max", CTLTYPE_INT }, \
591 { "mq_open_max", CTLTYPE_INT }, \
592 { "pagesize", CTLTYPE_INT }, \
593 { "rtsig_max", CTLTYPE_INT }, \
594 { "nsems_max", CTLTYPE_INT }, \
595 { "sem_value_max", CTLTYPE_INT }, \
596 { "sigqueue_max", CTLTYPE_INT }, \
597 { "timer_max", CTLTYPE_INT }, \
598 }
599
600 #ifdef _KERNEL
601
602 /*
603 * Declare some common oids.
604 */
605 extern struct sysctl_oid_list sysctl__children;
606 SYSCTL_DECL(_kern);
607 SYSCTL_DECL(_kern_features);
608 SYSCTL_DECL(_sysctl);
609 SYSCTL_DECL(_vm);
610 SYSCTL_DECL(_vfs);
611 SYSCTL_DECL(_net);
612 SYSCTL_DECL(_debug);
613 SYSCTL_DECL(_debug_sizeof);
614 SYSCTL_DECL(_hw);
615 SYSCTL_DECL(_hw_bus);
616 SYSCTL_DECL(_machdep);
617 SYSCTL_DECL(_user);
618 SYSCTL_DECL(_compat);
619 SYSCTL_DECL(_regression);
620
621 extern char machine[];
622 extern char osrelease[];
623 extern char ostype[];
624 extern char kern_ident[];
625
626 /* Dynamic oid handling */
627 struct sysctl_oid *sysctl_add_oid(struct sysctl_ctx_list *clist,
628 struct sysctl_oid_list *parent, int nbr, const char *name,
629 int kind, void *arg1, int arg2,
630 int (*handler) (SYSCTL_HANDLER_ARGS),
631 const char *fmt, const char *descr);
632 int sysctl_move_oid(struct sysctl_oid *oidp,
633 struct sysctl_oid_list *parent);
634 int sysctl_remove_oid(struct sysctl_oid *oidp, int del, int recurse);
635 int sysctl_ctx_init(struct sysctl_ctx_list *clist);
636 int sysctl_ctx_free(struct sysctl_ctx_list *clist);
637 struct sysctl_ctx_entry *sysctl_ctx_entry_add(struct sysctl_ctx_list *clist,
638 struct sysctl_oid *oidp);
639 struct sysctl_ctx_entry *sysctl_ctx_entry_find(struct sysctl_ctx_list *clist,
640 struct sysctl_oid *oidp);
641 int sysctl_ctx_entry_del(struct sysctl_ctx_list *clist,
642 struct sysctl_oid *oidp);
643
644 int kernel_sysctl(struct thread *td, int *name, u_int namelen, void *old,
645 size_t *oldlenp, void *new, size_t newlen,
646 size_t *retval, int flags);
647 int kernel_sysctlbyname(struct thread *td, char *name,
648 void *old, size_t *oldlenp, void *new, size_t newlen,
649 size_t *retval, int flags);
650 int userland_sysctl(struct thread *td, int *name, u_int namelen, void *old,
651 size_t *oldlenp, int inkernel, void *new, size_t newlen,
652 size_t *retval, int flags);
653 int sysctl_find_oid(int *name, u_int namelen, struct sysctl_oid **noid,
654 int *nindx, struct sysctl_req *req);
655 int sysctl_wire_old_buffer(struct sysctl_req *req, size_t len);
656
657 #else /* !_KERNEL */
658 #include <sys/cdefs.h>
659
660 __BEGIN_DECLS
661 int sysctl(int *, u_int, void *, size_t *, void *, size_t);
662 int sysctlbyname(const char *, void *, size_t *, void *, size_t);
663 int sysctlnametomib(const char *, int *, size_t *);
664 __END_DECLS
665 #endif /* _KERNEL */
666
667 #endif /* !_SYS_SYSCTL_H_ */
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