FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_mib.c
1 /*-
2 * Copyright (c) 1982, 1986, 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 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD
9 * project, to make these variables more userfriendly.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
36 */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD: releng/9.2/sys/kern/kern_mib.c 247874 2013-03-06 09:12:38Z avg $");
40
41 #include "opt_compat.h"
42 #include "opt_posix.h"
43 #include "opt_config.h"
44
45 #include <sys/param.h>
46 #include <sys/kernel.h>
47 #include <sys/sbuf.h>
48 #include <sys/systm.h>
49 #include <sys/sysctl.h>
50 #include <sys/proc.h>
51 #include <sys/lock.h>
52 #include <sys/mutex.h>
53 #include <sys/jail.h>
54 #include <sys/smp.h>
55 #include <sys/sx.h>
56 #include <sys/unistd.h>
57
58 SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0,
59 "Sysctl internal magic");
60 SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0,
61 "High kernel, proc, limits &c");
62 SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0,
63 "Virtual memory");
64 SYSCTL_NODE(, CTL_VFS, vfs, CTLFLAG_RW, 0,
65 "File system");
66 SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0,
67 "Network, (see socket.h)");
68 SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0,
69 "Debugging");
70 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0,
71 "Sizeof various things");
72 SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0,
73 "hardware");
74 SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0,
75 "machine dependent");
76 SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0,
77 "user-level");
78 SYSCTL_NODE(, CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0,
79 "p1003_1b, (see p1003_1b.h)");
80
81 SYSCTL_NODE(, OID_AUTO, compat, CTLFLAG_RW, 0,
82 "Compatibility code");
83 SYSCTL_NODE(, OID_AUTO, security, CTLFLAG_RW, 0,
84 "Security");
85 #ifdef REGRESSION
86 SYSCTL_NODE(, OID_AUTO, regression, CTLFLAG_RW, 0,
87 "Regression test MIB");
88 #endif
89
90 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE,
91 kern_ident, 0, "Kernel identifier");
92
93 SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD|CTLFLAG_MPSAFE|
94 CTLFLAG_CAPRD, osrelease, 0, "Operating system release");
95
96 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD,
97 0, BSD, "Operating system revision");
98
99 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE,
100 version, 0, "Kernel version");
101
102 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE,
103 compiler_version, 0, "Version of compiler used to compile kernel");
104
105 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE|
106 CTLFLAG_CAPRD, ostype, 0, "Operating system type");
107
108 /*
109 * NOTICE: The *userland* release date is available in
110 * /usr/include/osreldate.h
111 */
112 SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD|CTLFLAG_CAPRD,
113 &osreldate, 0, "Kernel release date");
114
115 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN,
116 &maxproc, 0, "Maximum number of processes");
117
118 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW,
119 &maxprocperuid, 0, "Maximum processes allowed per userid");
120
121 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN,
122 &maxusers, 0, "Hint for kernel tuning");
123
124 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD,
125 0, ARG_MAX, "Maximum bytes of argument to execve(2)");
126
127 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD,
128 0, _POSIX_VERSION, "Version of POSIX attempting to comply to");
129
130 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN|CTLFLAG_CAPRD,
131 &ngroups_max, 0,
132 "Maximum number of supplemental groups a user can belong to");
133
134 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD,
135 0, 1, "Whether job control is available");
136
137 #ifdef _POSIX_SAVED_IDS
138 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
139 0, 1, "Whether saved set-group/user ID is available");
140 #else
141 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD,
142 0, 0, "Whether saved set-group/user ID is available");
143 #endif
144
145 char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */
146
147 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW,
148 kernelname, sizeof kernelname, "Name of kernel file booted");
149
150 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD,
151 &mp_ncpus, 0, "Number of active CPUs");
152
153 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD,
154 0, BYTE_ORDER, "System byte order");
155
156 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD,
157 0, PAGE_SIZE, "System memory page size");
158
159 static int
160 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS)
161 {
162 char buf[256];
163 size_t len;
164
165 len = req->oldlen;
166 if (len > sizeof(buf))
167 len = sizeof(buf);
168 arc4rand(buf, len, 0);
169 return (SYSCTL_OUT(req, buf, len));
170 }
171
172 SYSCTL_PROC(_kern, KERN_ARND, arandom,
173 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0,
174 sysctl_kern_arnd, "", "arc4rand");
175
176 static int
177 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS)
178 {
179 u_long val;
180
181 val = ctob(physmem);
182 return (sysctl_handle_long(oidp, &val, 0, req));
183 }
184
185 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD,
186 0, 0, sysctl_hw_physmem, "LU", "");
187
188 static int
189 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS)
190 {
191 u_long val;
192 val = ctob(realmem);
193 return (sysctl_handle_long(oidp, &val, 0, req));
194 }
195 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD,
196 0, 0, sysctl_hw_realmem, "LU", "");
197 static int
198 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS)
199 {
200 u_long val;
201
202 val = ctob(physmem - cnt.v_wire_count);
203 return (sysctl_handle_long(oidp, &val, 0, req));
204 }
205
206 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD,
207 0, 0, sysctl_hw_usermem, "LU", "");
208
209 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, "");
210
211 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE };
212
213 static int
214 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS)
215 {
216 int error;
217 #ifdef SCTL_MASK32
218 int i;
219 uint32_t pagesizes32[MAXPAGESIZES];
220
221 if (req->flags & SCTL_MASK32) {
222 /*
223 * Recreate the "pagesizes" array with 32-bit elements. Truncate
224 * any page size greater than UINT32_MAX to zero.
225 */
226 for (i = 0; i < MAXPAGESIZES; i++)
227 pagesizes32[i] = (uint32_t)pagesizes[i];
228
229 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32));
230 } else
231 #endif
232 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes));
233 return (error);
234 }
235 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD,
236 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes");
237
238 #ifdef SCTL_MASK32
239 int adaptive_machine_arch = 1;
240 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW,
241 &adaptive_machine_arch, 1,
242 "Adapt reported machine architecture to the ABI of the binary");
243 #endif
244
245 static int
246 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS)
247 {
248 int error;
249 static const char machine_arch[] = MACHINE_ARCH;
250 #ifdef SCTL_MASK32
251 static const char machine_arch32[] = MACHINE_ARCH32;
252
253 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch)
254 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32));
255 else
256 #endif
257 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch));
258 return (error);
259
260 }
261 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD,
262 NULL, 0, sysctl_hw_machine_arch, "A", "System architecture");
263
264 static int
265 sysctl_hostname(SYSCTL_HANDLER_ARGS)
266 {
267 struct prison *pr, *cpr;
268 size_t pr_offset;
269 char tmpname[MAXHOSTNAMELEN];
270 int descend, error, len;
271
272 /*
273 * This function can set: hostname domainname hostuuid.
274 * Keep that in mind when comments say "hostname".
275 */
276 pr_offset = (size_t)arg1;
277 len = arg2;
278 KASSERT(len <= sizeof(tmpname),
279 ("length %d too long for %s", len, __func__));
280
281 pr = req->td->td_ucred->cr_prison;
282 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
283 return (EPERM);
284 /*
285 * Make a local copy of hostname to get/set so we don't have to hold
286 * the jail mutex during the sysctl copyin/copyout activities.
287 */
288 mtx_lock(&pr->pr_mtx);
289 bcopy((char *)pr + pr_offset, tmpname, len);
290 mtx_unlock(&pr->pr_mtx);
291
292 error = sysctl_handle_string(oidp, tmpname, len, req);
293
294 if (req->newptr != NULL && error == 0) {
295 /*
296 * Copy the locally set hostname to all jails that share
297 * this host info.
298 */
299 sx_slock(&allprison_lock);
300 while (!(pr->pr_flags & PR_HOST))
301 pr = pr->pr_parent;
302 mtx_lock(&pr->pr_mtx);
303 bcopy(tmpname, (char *)pr + pr_offset, len);
304 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
305 if (cpr->pr_flags & PR_HOST)
306 descend = 0;
307 else
308 bcopy(tmpname, (char *)cpr + pr_offset, len);
309 mtx_unlock(&pr->pr_mtx);
310 sx_sunlock(&allprison_lock);
311 }
312 return (error);
313 }
314
315 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname,
316 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
317 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN,
318 sysctl_hostname, "A", "Hostname");
319 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname,
320 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
321 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN,
322 sysctl_hostname, "A", "Name of the current YP/NIS domain");
323 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid,
324 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
325 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN,
326 sysctl_hostname, "A", "Host UUID");
327
328 static int regression_securelevel_nonmonotonic = 0;
329
330 #ifdef REGRESSION
331 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW,
332 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered");
333 #endif
334
335 static int
336 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS)
337 {
338 struct prison *pr, *cpr;
339 int descend, error, level;
340
341 pr = req->td->td_ucred->cr_prison;
342
343 /*
344 * Reading the securelevel is easy, since the current jail's level
345 * is known to be at least as secure as any higher levels. Perform
346 * a lockless read since the securelevel is an integer.
347 */
348 level = pr->pr_securelevel;
349 error = sysctl_handle_int(oidp, &level, 0, req);
350 if (error || !req->newptr)
351 return (error);
352 /* Permit update only if the new securelevel exceeds the old. */
353 sx_slock(&allprison_lock);
354 mtx_lock(&pr->pr_mtx);
355 if (!regression_securelevel_nonmonotonic &&
356 level < pr->pr_securelevel) {
357 mtx_unlock(&pr->pr_mtx);
358 sx_sunlock(&allprison_lock);
359 return (EPERM);
360 }
361 pr->pr_securelevel = level;
362 /*
363 * Set all child jails to be at least this level, but do not lower
364 * them (even if regression_securelevel_nonmonotonic).
365 */
366 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) {
367 if (cpr->pr_securelevel < level)
368 cpr->pr_securelevel = level;
369 }
370 mtx_unlock(&pr->pr_mtx);
371 sx_sunlock(&allprison_lock);
372 return (error);
373 }
374
375 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel,
376 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl,
377 "I", "Current secure level");
378
379 #ifdef INCLUDE_CONFIG_FILE
380 /* Actual kernel configuration options. */
381 extern char kernconfstring[];
382
383 static int
384 sysctl_kern_config(SYSCTL_HANDLER_ARGS)
385 {
386 return (sysctl_handle_string(oidp, kernconfstring,
387 strlen(kernconfstring), req));
388 }
389
390 SYSCTL_PROC(_kern, OID_AUTO, conftxt, CTLTYPE_STRING|CTLFLAG_RW,
391 0, 0, sysctl_kern_config, "", "Kernel configuration file");
392 #endif
393
394 static int
395 sysctl_hostid(SYSCTL_HANDLER_ARGS)
396 {
397 struct prison *pr, *cpr;
398 u_long tmpid;
399 int descend, error;
400
401 /*
402 * Like sysctl_hostname, except it operates on a u_long
403 * instead of a string, and is used only for hostid.
404 */
405 pr = req->td->td_ucred->cr_prison;
406 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr)
407 return (EPERM);
408 tmpid = pr->pr_hostid;
409 error = sysctl_handle_long(oidp, &tmpid, 0, req);
410
411 if (req->newptr != NULL && error == 0) {
412 sx_slock(&allprison_lock);
413 while (!(pr->pr_flags & PR_HOST))
414 pr = pr->pr_parent;
415 mtx_lock(&pr->pr_mtx);
416 pr->pr_hostid = tmpid;
417 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend)
418 if (cpr->pr_flags & PR_HOST)
419 descend = 0;
420 else
421 cpr->pr_hostid = tmpid;
422 mtx_unlock(&pr->pr_mtx);
423 sx_sunlock(&allprison_lock);
424 }
425 return (error);
426 }
427
428 SYSCTL_PROC(_kern, KERN_HOSTID, hostid,
429 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE,
430 NULL, 0, sysctl_hostid, "LU", "Host ID");
431
432 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features");
433
434 #ifdef COMPAT_FREEBSD4
435 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4");
436 #endif
437
438 #ifdef COMPAT_FREEBSD5
439 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5");
440 #endif
441
442 #ifdef COMPAT_FREEBSD6
443 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6");
444 #endif
445
446 #ifdef COMPAT_FREEBSD7
447 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7");
448 #endif
449
450 /*
451 * This is really cheating. These actually live in the libc, something
452 * which I'm not quite sure is a good idea anyway, but in order for
453 * getnext and friends to actually work, we define dummies here.
454 *
455 * XXXRW: These probably should be CTLFLAG_CAPRD.
456 */
457 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD,
458 "", 0, "PATH that finds all the standard utilities");
459 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD,
460 0, 0, "Max ibase/obase values in bc(1)");
461 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD,
462 0, 0, "Max array size in bc(1)");
463 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD,
464 0, 0, "Max scale value in bc(1)");
465 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD,
466 0, 0, "Max string length in bc(1)");
467 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD,
468 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry");
469 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, "");
470 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD,
471 0, 0, "Max length (bytes) of a text-processing utility's input line");
472 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD,
473 0, 0, "Maximum number of repeats of a regexp permitted");
474 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD,
475 0, 0,
476 "The version of POSIX 1003.2 with which the system attempts to comply");
477 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD,
478 0, 0, "Whether C development supports the C bindings option");
479 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD,
480 0, 0, "Whether system supports the C development utilities option");
481 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD,
482 0, 0, "");
483 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD,
484 0, 0, "Whether system supports FORTRAN development utilities");
485 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD,
486 0, 0, "Whether system supports FORTRAN runtime utilities");
487 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD,
488 0, 0, "Whether system supports creation of locales");
489 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD,
490 0, 0, "Whether system supports software development utilities");
491 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD,
492 0, 0, "Whether system supports the user portability utilities");
493 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD,
494 0, 0, "Min Maximum number of streams a process may have open at one time");
495 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD,
496 0, 0, "Min Maximum number of types supported for timezone names");
497
498 #include <sys/vnode.h>
499 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD,
500 0, sizeof(struct vnode), "sizeof(struct vnode)");
501
502 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD,
503 0, sizeof(struct proc), "sizeof(struct proc)");
504
505 static int
506 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS)
507 {
508 int error, pm;
509
510 pm = pid_max;
511 error = sysctl_handle_int(oidp, &pm, 0, req);
512 if (error || !req->newptr)
513 return (error);
514 sx_xlock(&proctree_lock);
515 sx_xlock(&allproc_lock);
516
517 /*
518 * Only permit the values less then PID_MAX.
519 * As a safety measure, do not allow to limit the pid_max too much.
520 */
521 if (pm < 300 || pm > PID_MAX)
522 error = EINVAL;
523 else
524 pid_max = pm;
525 sx_xunlock(&allproc_lock);
526 sx_xunlock(&proctree_lock);
527 return (error);
528 }
529 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_TUN |
530 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_pid_max, "I",
531 "Maximum allowed pid");
532
533 #include <sys/bio.h>
534 #include <sys/buf.h>
535 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD,
536 0, sizeof(struct bio), "sizeof(struct bio)");
537 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD,
538 0, sizeof(struct buf), "sizeof(struct buf)");
539
540 #include <sys/user.h>
541 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD,
542 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)");
543
544 /* XXX compatibility, remove for 6.0 */
545 #include <sys/imgact.h>
546 #include <sys/imgact_elf.h>
547 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW,
548 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)),
549 "compatibility for kern.fallback_elf_brand");
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