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("$FreeBSD$"); 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 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD, kernconfstring, 0, 384 "Kernel configuration file"); 385 #endif 386 387 static int 388 sysctl_hostid(SYSCTL_HANDLER_ARGS) 389 { 390 struct prison *pr, *cpr; 391 u_long tmpid; 392 int descend, error; 393 394 /* 395 * Like sysctl_hostname, except it operates on a u_long 396 * instead of a string, and is used only for hostid. 397 */ 398 pr = req->td->td_ucred->cr_prison; 399 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 400 return (EPERM); 401 tmpid = pr->pr_hostid; 402 error = sysctl_handle_long(oidp, &tmpid, 0, req); 403 404 if (req->newptr != NULL && error == 0) { 405 sx_slock(&allprison_lock); 406 while (!(pr->pr_flags & PR_HOST)) 407 pr = pr->pr_parent; 408 mtx_lock(&pr->pr_mtx); 409 pr->pr_hostid = tmpid; 410 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 411 if (cpr->pr_flags & PR_HOST) 412 descend = 0; 413 else 414 cpr->pr_hostid = tmpid; 415 mtx_unlock(&pr->pr_mtx); 416 sx_sunlock(&allprison_lock); 417 } 418 return (error); 419 } 420 421 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 422 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 423 NULL, 0, sysctl_hostid, "LU", "Host ID"); 424 425 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 426 427 #ifdef COMPAT_FREEBSD4 428 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 429 #endif 430 431 #ifdef COMPAT_FREEBSD5 432 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 433 #endif 434 435 #ifdef COMPAT_FREEBSD6 436 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 437 #endif 438 439 #ifdef COMPAT_FREEBSD7 440 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 441 #endif 442 443 /* 444 * This is really cheating. These actually live in the libc, something 445 * which I'm not quite sure is a good idea anyway, but in order for 446 * getnext and friends to actually work, we define dummies here. 447 * 448 * XXXRW: These probably should be CTLFLAG_CAPRD. 449 */ 450 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 451 "", 0, "PATH that finds all the standard utilities"); 452 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 453 0, 0, "Max ibase/obase values in bc(1)"); 454 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 455 0, 0, "Max array size in bc(1)"); 456 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 457 0, 0, "Max scale value in bc(1)"); 458 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 459 0, 0, "Max string length in bc(1)"); 460 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 461 0, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 462 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 0, 0, ""); 463 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 464 0, 0, "Max length (bytes) of a text-processing utility's input line"); 465 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 466 0, 0, "Maximum number of repeats of a regexp permitted"); 467 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 468 0, 0, 469 "The version of POSIX 1003.2 with which the system attempts to comply"); 470 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 471 0, 0, "Whether C development supports the C bindings option"); 472 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 473 0, 0, "Whether system supports the C development utilities option"); 474 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 475 0, 0, ""); 476 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 477 0, 0, "Whether system supports FORTRAN development utilities"); 478 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 479 0, 0, "Whether system supports FORTRAN runtime utilities"); 480 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 481 0, 0, "Whether system supports creation of locales"); 482 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 483 0, 0, "Whether system supports software development utilities"); 484 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 485 0, 0, "Whether system supports the user portability utilities"); 486 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 487 0, 0, "Min Maximum number of streams a process may have open at one time"); 488 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 489 0, 0, "Min Maximum number of types supported for timezone names"); 490 491 #include <sys/vnode.h> 492 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 493 0, sizeof(struct vnode), "sizeof(struct vnode)"); 494 495 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 496 0, sizeof(struct proc), "sizeof(struct proc)"); 497 498 static int 499 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 500 { 501 int error, pm; 502 503 pm = pid_max; 504 error = sysctl_handle_int(oidp, &pm, 0, req); 505 if (error || !req->newptr) 506 return (error); 507 sx_xlock(&proctree_lock); 508 sx_xlock(&allproc_lock); 509 510 /* 511 * Only permit the values less then PID_MAX. 512 * As a safety measure, do not allow to limit the pid_max too much. 513 */ 514 if (pm < 300 || pm > PID_MAX) 515 error = EINVAL; 516 else 517 pid_max = pm; 518 sx_xunlock(&allproc_lock); 519 sx_xunlock(&proctree_lock); 520 return (error); 521 } 522 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_TUN | 523 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_pid_max, "I", 524 "Maximum allowed pid"); 525 526 #include <sys/bio.h> 527 #include <sys/buf.h> 528 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 529 0, sizeof(struct bio), "sizeof(struct bio)"); 530 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 531 0, sizeof(struct buf), "sizeof(struct buf)"); 532 533 #include <sys/user.h> 534 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 535 0, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 536 537 /* XXX compatibility, remove for 6.0 */ 538 #include <sys/imgact.h> 539 #include <sys/imgact_elf.h> 540 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 541 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 542 "compatibility for kern.fallback_elf_brand"); 543