1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Mike Karels at Berkeley Software Design, Inc. 9 * 10 * Quite extensively rewritten by Poul-Henning Kamp of the FreeBSD 11 * project, to make these variables more userfriendly. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include "opt_posix.h" 44 #include "opt_config.h" 45 46 #include <sys/param.h> 47 #include <sys/jail.h> 48 #include <sys/kernel.h> 49 #include <sys/limits.h> 50 #include <sys/lock.h> 51 #include <sys/mutex.h> 52 #include <sys/proc.h> 53 #include <sys/random.h> 54 #include <sys/sbuf.h> 55 #include <sys/smp.h> 56 #include <sys/sx.h> 57 #include <sys/vmmeter.h> 58 #include <sys/sysctl.h> 59 #include <sys/systm.h> 60 #include <sys/unistd.h> 61 62 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 63 "Sysctl internal magic"); 64 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 65 "High kernel, proc, limits &c"); 66 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 67 "Virtual memory"); 68 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 69 "File system"); 70 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 71 "Network, (see socket.h)"); 72 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 73 "Debugging"); 74 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 75 "Sizeof various things"); 76 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 77 "hardware"); 78 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 79 "machine dependent"); 80 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 81 "user-level"); 82 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 83 "p1003_1b, (see p1003_1b.h)"); 84 85 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 86 "Compatibility code"); 87 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 88 "Security"); 89 #ifdef REGRESSION 90 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 91 "Regression test MIB"); 92 #endif 93 94 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 95 kern_ident, 0, "Kernel identifier"); 96 97 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 98 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 99 100 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 101 version, 0, "Kernel version"); 102 103 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 104 compiler_version, 0, "Version of compiler used to compile kernel"); 105 106 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 107 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 108 109 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 110 &maxproc, 0, "Maximum number of processes"); 111 112 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 113 &maxprocperuid, 0, "Maximum processes allowed per userid"); 114 115 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 116 &maxusers, 0, "Hint for kernel tuning"); 117 118 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 119 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 120 121 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 122 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 123 124 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 125 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 126 "Maximum number of supplemental groups a user can belong to"); 127 128 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 129 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 130 131 #ifdef _POSIX_SAVED_IDS 132 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 133 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 134 #else 135 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 136 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 137 #endif 138 139 char kernelname[MAXPATHLEN] = "/boot/kernel/kernel"; /* XXX bloat */ 140 141 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 142 kernelname, sizeof kernelname, "Name of kernel file booted"); 143 144 SYSCTL_INT(_kern, KERN_MAXPHYS, maxphys, CTLFLAG_RD | CTLFLAG_CAPRD, 145 SYSCTL_NULL_INT_PTR, MAXPHYS, "Maximum block I/O access size"); 146 147 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 148 &mp_ncpus, 0, "Number of active CPUs"); 149 150 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 151 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 152 153 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 154 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 155 156 static int 157 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 158 { 159 char buf[256]; 160 size_t len; 161 162 /*- 163 * This is one of the very few legitimate uses of read_random(9). 164 * Use of arc4random(9) is not recommended as that will ignore 165 * an unsafe (i.e. unseeded) random(4). 166 * 167 * If random(4) is not seeded, then this returns 0, so the 168 * sysctl will return a zero-length buffer. 169 */ 170 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 171 return (SYSCTL_OUT(req, buf, len)); 172 } 173 174 SYSCTL_PROC(_kern, KERN_ARND, arandom, 175 CTLTYPE_OPAQUE | CTLFLAG_RD | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, NULL, 0, 176 sysctl_kern_arnd, "", "arc4rand"); 177 178 static int 179 sysctl_hw_physmem(SYSCTL_HANDLER_ARGS) 180 { 181 u_long val, p; 182 183 p = SIZE_T_MAX >> PAGE_SHIFT; 184 if (physmem < p) 185 p = physmem; 186 val = ctob(p); 187 return (sysctl_handle_long(oidp, &val, 0, req)); 188 } 189 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 190 0, 0, sysctl_hw_physmem, "LU", 191 "Amount of physical memory (in bytes)"); 192 193 static int 194 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 195 { 196 u_long val, p; 197 198 p = SIZE_T_MAX >> PAGE_SHIFT; 199 if (realmem < p) 200 p = realmem; 201 val = ctob(p); 202 return (sysctl_handle_long(oidp, &val, 0, req)); 203 } 204 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 205 0, 0, sysctl_hw_realmem, "LU", 206 "Amount of memory (in bytes) reported by the firmware"); 207 208 static int 209 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 210 { 211 u_long val, p, p1; 212 213 p1 = physmem - vm_wire_count(); 214 p = SIZE_T_MAX >> PAGE_SHIFT; 215 if (p1 < p) 216 p = p1; 217 val = ctob(p); 218 return (sysctl_handle_long(oidp, &val, 0, req)); 219 } 220 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 221 0, 0, sysctl_hw_usermem, "LU", 222 "Amount of memory (in bytes) which is not wired"); 223 224 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, 225 "Amount of physical memory (in pages)"); 226 227 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 228 229 static int 230 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 231 { 232 int error; 233 #ifdef SCTL_MASK32 234 int i; 235 uint32_t pagesizes32[MAXPAGESIZES]; 236 237 if (req->flags & SCTL_MASK32) { 238 /* 239 * Recreate the "pagesizes" array with 32-bit elements. Truncate 240 * any page size greater than UINT32_MAX to zero. 241 */ 242 for (i = 0; i < MAXPAGESIZES; i++) 243 pagesizes32[i] = (uint32_t)pagesizes[i]; 244 245 error = SYSCTL_OUT(req, pagesizes32, sizeof(pagesizes32)); 246 } else 247 #endif 248 error = SYSCTL_OUT(req, pagesizes, sizeof(pagesizes)); 249 return (error); 250 } 251 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 252 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 253 254 #ifdef SCTL_MASK32 255 int adaptive_machine_arch = 1; 256 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 257 &adaptive_machine_arch, 1, 258 "Adapt reported machine architecture to the ABI of the binary"); 259 #endif 260 261 static int 262 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 263 { 264 int error; 265 static const char machine_arch[] = MACHINE_ARCH; 266 #ifdef SCTL_MASK32 267 static const char machine_arch32[] = MACHINE_ARCH32; 268 269 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 270 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 271 else 272 #endif 273 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 274 return (error); 275 276 } 277 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 278 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 279 "System architecture"); 280 281 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 282 #ifdef COMPAT_FREEBSD32 283 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 284 #else 285 MACHINE_ARCH, 0, "Supported architectures for binaries"); 286 #endif 287 288 static int 289 sysctl_hostname(SYSCTL_HANDLER_ARGS) 290 { 291 struct prison *pr, *cpr; 292 size_t pr_offset; 293 char tmpname[MAXHOSTNAMELEN]; 294 int descend, error, len; 295 296 /* 297 * This function can set: hostname domainname hostuuid. 298 * Keep that in mind when comments say "hostname". 299 */ 300 pr_offset = (size_t)arg1; 301 len = arg2; 302 KASSERT(len <= sizeof(tmpname), 303 ("length %d too long for %s", len, __func__)); 304 305 pr = req->td->td_ucred->cr_prison; 306 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 307 return (EPERM); 308 /* 309 * Make a local copy of hostname to get/set so we don't have to hold 310 * the jail mutex during the sysctl copyin/copyout activities. 311 */ 312 mtx_lock(&pr->pr_mtx); 313 bcopy((char *)pr + pr_offset, tmpname, len); 314 mtx_unlock(&pr->pr_mtx); 315 316 error = sysctl_handle_string(oidp, tmpname, len, req); 317 318 if (req->newptr != NULL && error == 0) { 319 /* 320 * Copy the locally set hostname to all jails that share 321 * this host info. 322 */ 323 sx_slock(&allprison_lock); 324 while (!(pr->pr_flags & PR_HOST)) 325 pr = pr->pr_parent; 326 mtx_lock(&pr->pr_mtx); 327 bcopy(tmpname, (char *)pr + pr_offset, len); 328 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 329 if (cpr->pr_flags & PR_HOST) 330 descend = 0; 331 else 332 bcopy(tmpname, (char *)cpr + pr_offset, len); 333 mtx_unlock(&pr->pr_mtx); 334 sx_sunlock(&allprison_lock); 335 } 336 return (error); 337 } 338 339 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 340 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 341 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 342 sysctl_hostname, "A", "Hostname"); 343 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 344 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 345 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 346 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 347 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 348 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_CAPRD | CTLFLAG_MPSAFE, 349 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 350 sysctl_hostname, "A", "Host UUID"); 351 352 static int regression_securelevel_nonmonotonic = 0; 353 354 #ifdef REGRESSION 355 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 356 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 357 #endif 358 359 static int 360 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 361 { 362 struct prison *pr, *cpr; 363 int descend, error, level; 364 365 pr = req->td->td_ucred->cr_prison; 366 367 /* 368 * Reading the securelevel is easy, since the current jail's level 369 * is known to be at least as secure as any higher levels. Perform 370 * a lockless read since the securelevel is an integer. 371 */ 372 level = pr->pr_securelevel; 373 error = sysctl_handle_int(oidp, &level, 0, req); 374 if (error || !req->newptr) 375 return (error); 376 /* Permit update only if the new securelevel exceeds the old. */ 377 sx_slock(&allprison_lock); 378 mtx_lock(&pr->pr_mtx); 379 if (!regression_securelevel_nonmonotonic && 380 level < pr->pr_securelevel) { 381 mtx_unlock(&pr->pr_mtx); 382 sx_sunlock(&allprison_lock); 383 return (EPERM); 384 } 385 pr->pr_securelevel = level; 386 /* 387 * Set all child jails to be at least this level, but do not lower 388 * them (even if regression_securelevel_nonmonotonic). 389 */ 390 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 391 if (cpr->pr_securelevel < level) 392 cpr->pr_securelevel = level; 393 } 394 mtx_unlock(&pr->pr_mtx); 395 sx_sunlock(&allprison_lock); 396 return (error); 397 } 398 399 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 400 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 401 "I", "Current secure level"); 402 403 #ifdef INCLUDE_CONFIG_FILE 404 /* Actual kernel configuration options. */ 405 extern char kernconfstring[]; 406 407 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 408 kernconfstring, 0, "Kernel configuration file"); 409 #endif 410 411 static int 412 sysctl_hostid(SYSCTL_HANDLER_ARGS) 413 { 414 struct prison *pr, *cpr; 415 u_long tmpid; 416 int descend, error; 417 418 /* 419 * Like sysctl_hostname, except it operates on a u_long 420 * instead of a string, and is used only for hostid. 421 */ 422 pr = req->td->td_ucred->cr_prison; 423 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 424 return (EPERM); 425 tmpid = pr->pr_hostid; 426 error = sysctl_handle_long(oidp, &tmpid, 0, req); 427 428 if (req->newptr != NULL && error == 0) { 429 sx_slock(&allprison_lock); 430 while (!(pr->pr_flags & PR_HOST)) 431 pr = pr->pr_parent; 432 mtx_lock(&pr->pr_mtx); 433 pr->pr_hostid = tmpid; 434 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 435 if (cpr->pr_flags & PR_HOST) 436 descend = 0; 437 else 438 cpr->pr_hostid = tmpid; 439 mtx_unlock(&pr->pr_mtx); 440 sx_sunlock(&allprison_lock); 441 } 442 return (error); 443 } 444 445 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 446 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 447 NULL, 0, sysctl_hostid, "LU", "Host ID"); 448 449 /* 450 * The osrelease string is copied from the global (osrelease in vers.c) into 451 * prison0 by a sysinit and is inherited by child jails if not changed at jail 452 * creation, so we always return the copy from the current prison data. 453 */ 454 static int 455 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 456 { 457 struct prison *pr; 458 459 pr = req->td->td_ucred->cr_prison; 460 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 461 462 } 463 464 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 465 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 466 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 467 468 /* 469 * The osreldate number is copied from the global (osreldate in vers.c) into 470 * prison0 by a sysinit and is inherited by child jails if not changed at jail 471 * creation, so we always return the value from the current prison data. 472 */ 473 static int 474 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 475 { 476 struct prison *pr; 477 478 pr = req->td->td_ucred->cr_prison; 479 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 480 481 } 482 483 /* 484 * NOTICE: The *userland* release date is available in 485 * /usr/include/osreldate.h 486 */ 487 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 488 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 489 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 490 491 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 492 493 #ifdef COMPAT_FREEBSD4 494 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 495 #endif 496 497 #ifdef COMPAT_FREEBSD5 498 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 499 #endif 500 501 #ifdef COMPAT_FREEBSD6 502 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 503 #endif 504 505 #ifdef COMPAT_FREEBSD7 506 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 507 #endif 508 509 /* 510 * This is really cheating. These actually live in the libc, something 511 * which I'm not quite sure is a good idea anyway, but in order for 512 * getnext and friends to actually work, we define dummies here. 513 * 514 * XXXRW: These probably should be CTLFLAG_CAPRD. 515 */ 516 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 517 "", 0, "PATH that finds all the standard utilities"); 518 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 519 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 520 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 521 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 522 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 523 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 524 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 525 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 526 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 527 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 528 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, ""); 530 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 532 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 534 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, 536 "The version of POSIX 1003.2 with which the system attempts to comply"); 537 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 538 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 539 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 540 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 541 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 542 SYSCTL_NULL_INT_PTR, 0, ""); 543 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 544 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 545 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 546 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 547 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 548 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 549 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 550 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 551 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 552 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 553 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 554 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 555 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 556 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 557 558 #include <sys/vnode.h> 559 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 560 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 561 562 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 563 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 564 565 static int 566 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 567 { 568 int error, pm; 569 570 pm = pid_max; 571 error = sysctl_handle_int(oidp, &pm, 0, req); 572 if (error || !req->newptr) 573 return (error); 574 sx_xlock(&proctree_lock); 575 sx_xlock(&allproc_lock); 576 577 /* 578 * Only permit the values less then PID_MAX. 579 * As a safety measure, do not allow to limit the pid_max too much. 580 */ 581 if (pm < 300 || pm > PID_MAX) 582 error = EINVAL; 583 else 584 pid_max = pm; 585 sx_xunlock(&allproc_lock); 586 sx_xunlock(&proctree_lock); 587 return (error); 588 } 589 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 590 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 591 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 592 593 #include <sys/bio.h> 594 #include <sys/buf.h> 595 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 596 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 597 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 598 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 599 600 #include <sys/user.h> 601 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 602 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 603 604 /* Used by kernel debuggers. */ 605 const int pcb_size = sizeof(struct pcb); 606 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 607 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 608 609 /* XXX compatibility, remove for 6.0 */ 610 #include <sys/imgact.h> 611 #include <sys/imgact_elf.h> 612 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 613 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 614 "compatibility for kern.fallback_elf_brand"); 615