Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_mib.c
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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/jail.h> 47 #include <sys/kernel.h> 48 #include <sys/limits.h> 49 #include <sys/lock.h> 50 #include <sys/mutex.h> 51 #include <sys/proc.h> 52 #include <sys/random.h> 53 #include <sys/sbuf.h> 54 #include <sys/smp.h> 55 #include <sys/sx.h> 56 #include <sys/vmmeter.h> 57 #include <sys/sysctl.h> 58 #include <sys/systm.h> 59 #include <sys/unistd.h> 60 61 SYSCTL_ROOT_NODE(0, sysctl, CTLFLAG_RW, 0, 62 "Sysctl internal magic"); 63 SYSCTL_ROOT_NODE(CTL_KERN, kern, CTLFLAG_RW|CTLFLAG_CAPRD, 0, 64 "High kernel, proc, limits &c"); 65 SYSCTL_ROOT_NODE(CTL_VM, vm, CTLFLAG_RW, 0, 66 "Virtual memory"); 67 SYSCTL_ROOT_NODE(CTL_VFS, vfs, CTLFLAG_RW, 0, 68 "File system"); 69 SYSCTL_ROOT_NODE(CTL_NET, net, CTLFLAG_RW, 0, 70 "Network, (see socket.h)"); 71 SYSCTL_ROOT_NODE(CTL_DEBUG, debug, CTLFLAG_RW, 0, 72 "Debugging"); 73 SYSCTL_NODE(_debug, OID_AUTO, sizeof, CTLFLAG_RW, 0, 74 "Sizeof various things"); 75 SYSCTL_ROOT_NODE(CTL_HW, hw, CTLFLAG_RW, 0, 76 "hardware"); 77 SYSCTL_ROOT_NODE(CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 78 "machine dependent"); 79 SYSCTL_NODE(_machdep, OID_AUTO, mitigations, CTLFLAG_RW, 0, 80 "Machine dependent platform mitigations."); 81 SYSCTL_ROOT_NODE(CTL_USER, user, CTLFLAG_RW, 0, 82 "user-level"); 83 SYSCTL_ROOT_NODE(CTL_P1003_1B, p1003_1b, CTLFLAG_RW, 0, 84 "p1003_1b, (see p1003_1b.h)"); 85 86 SYSCTL_ROOT_NODE(OID_AUTO, compat, CTLFLAG_RW, 0, 87 "Compatibility code"); 88 SYSCTL_ROOT_NODE(OID_AUTO, security, CTLFLAG_RW, 0, 89 "Security"); 90 #ifdef REGRESSION 91 SYSCTL_ROOT_NODE(OID_AUTO, regression, CTLFLAG_RW, 0, 92 "Regression test MIB"); 93 #endif 94 95 SYSCTL_STRING(_kern, OID_AUTO, ident, CTLFLAG_RD|CTLFLAG_MPSAFE, 96 kern_ident, 0, "Kernel identifier"); 97 98 SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD|CTLFLAG_CAPRD, 99 SYSCTL_NULL_INT_PTR, BSD, "Operating system revision"); 100 101 SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD|CTLFLAG_MPSAFE, 102 version, 0, "Kernel version"); 103 104 SYSCTL_STRING(_kern, OID_AUTO, compiler_version, CTLFLAG_RD|CTLFLAG_MPSAFE, 105 compiler_version, 0, "Version of compiler used to compile kernel"); 106 107 SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD|CTLFLAG_MPSAFE| 108 CTLFLAG_CAPRD, ostype, 0, "Operating system type"); 109 110 SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 111 &maxproc, 0, "Maximum number of processes"); 112 113 SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, CTLFLAG_RW, 114 &maxprocperuid, 0, "Maximum processes allowed per userid"); 115 116 SYSCTL_INT(_kern, OID_AUTO, maxusers, CTLFLAG_RDTUN | CTLFLAG_NOFETCH, 117 &maxusers, 0, "Hint for kernel tuning"); 118 119 SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD|CTLFLAG_CAPRD, 120 SYSCTL_NULL_INT_PTR, ARG_MAX, "Maximum bytes of argument to execve(2)"); 121 122 SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD|CTLFLAG_CAPRD, 123 SYSCTL_NULL_INT_PTR, _POSIX_VERSION, "Version of POSIX attempting to comply to"); 124 125 SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RDTUN | 126 CTLFLAG_NOFETCH | CTLFLAG_CAPRD, &ngroups_max, 0, 127 "Maximum number of supplemental groups a user can belong to"); 128 129 SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD|CTLFLAG_CAPRD, 130 SYSCTL_NULL_INT_PTR, 1, "Whether job control is available"); 131 132 #ifdef _POSIX_SAVED_IDS 133 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 134 SYSCTL_NULL_INT_PTR, 1, "Whether saved set-group/user ID is available"); 135 #else 136 SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD|CTLFLAG_CAPRD, 137 SYSCTL_NULL_INT_PTR, 0, "Whether saved set-group/user ID is available"); 138 #endif 139 140 char kernelname[MAXPATHLEN] = "/boot/kernel/kernel"; /* XXX bloat */ 141 142 SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, CTLFLAG_RW | CTLFLAG_MPSAFE, 143 kernelname, sizeof kernelname, "Name of kernel file booted"); 144 145 SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD|CTLFLAG_CAPRD, 146 &mp_ncpus, 0, "Number of active CPUs"); 147 148 SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD|CTLFLAG_CAPRD, 149 SYSCTL_NULL_INT_PTR, BYTE_ORDER, "System byte order"); 150 151 SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD|CTLFLAG_CAPRD, 152 SYSCTL_NULL_INT_PTR, PAGE_SIZE, "System memory page size"); 153 154 static int 155 sysctl_kern_arnd(SYSCTL_HANDLER_ARGS) 156 { 157 char buf[256]; 158 size_t len; 159 160 /*- 161 * This is one of the very few legitimate uses of read_random(9). 162 * Use of arc4random(9) is not recommended as that will ignore 163 * an unsafe (i.e. unseeded) random(4). 164 * 165 * If random(4) is not seeded, then this returns 0, so the 166 * sysctl will return a zero-length buffer. 167 */ 168 len = read_random(buf, MIN(req->oldlen, sizeof(buf))); 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, p; 180 181 p = SIZE_T_MAX >> PAGE_SHIFT; 182 if (physmem < p) 183 p = physmem; 184 val = ctob(p); 185 return (sysctl_handle_long(oidp, &val, 0, req)); 186 } 187 SYSCTL_PROC(_hw, HW_PHYSMEM, physmem, CTLTYPE_ULONG | CTLFLAG_RD, 188 0, 0, sysctl_hw_physmem, "LU", 189 "Amount of physical memory (in bytes)"); 190 191 static int 192 sysctl_hw_realmem(SYSCTL_HANDLER_ARGS) 193 { 194 u_long val, p; 195 196 p = SIZE_T_MAX >> PAGE_SHIFT; 197 if (realmem < p) 198 p = realmem; 199 val = ctob(p); 200 return (sysctl_handle_long(oidp, &val, 0, req)); 201 } 202 SYSCTL_PROC(_hw, HW_REALMEM, realmem, CTLTYPE_ULONG | CTLFLAG_RD, 203 0, 0, sysctl_hw_realmem, "LU", 204 "Amount of memory (in bytes) reported by the firmware"); 205 206 static int 207 sysctl_hw_usermem(SYSCTL_HANDLER_ARGS) 208 { 209 u_long val, p, p1; 210 211 p1 = physmem - vm_cnt.v_wire_count; 212 p = SIZE_T_MAX >> PAGE_SHIFT; 213 if (p1 < p) 214 p = p1; 215 val = ctob(p); 216 return (sysctl_handle_long(oidp, &val, 0, req)); 217 } 218 SYSCTL_PROC(_hw, HW_USERMEM, usermem, CTLTYPE_ULONG | CTLFLAG_RD, 219 0, 0, sysctl_hw_usermem, "LU", 220 "Amount of memory (in bytes) which is not wired"); 221 222 SYSCTL_LONG(_hw, OID_AUTO, availpages, CTLFLAG_RD, &physmem, 0, 223 "Amount of physical memory (in pages)"); 224 225 u_long pagesizes[MAXPAGESIZES] = { PAGE_SIZE }; 226 227 static int 228 sysctl_hw_pagesizes(SYSCTL_HANDLER_ARGS) 229 { 230 int error; 231 size_t len; 232 #ifdef SCTL_MASK32 233 int i; 234 uint32_t pagesizes32[MAXPAGESIZES]; 235 236 if (req->flags & SCTL_MASK32) { 237 /* 238 * Recreate the "pagesizes" array with 32-bit elements. 239 * Truncate any page size greater than UINT32_MAX to zero, 240 * which assumes that page sizes are powers of two. 241 */ 242 for (i = 0; i < MAXPAGESIZES; i++) 243 pagesizes32[i] = (uint32_t)pagesizes[i]; 244 245 len = sizeof(pagesizes32); 246 if (len > req->oldlen) 247 len = req->oldlen; 248 error = SYSCTL_OUT(req, pagesizes32, len); 249 } else 250 #endif 251 { 252 len = sizeof(pagesizes); 253 if (len > req->oldlen) 254 len = req->oldlen; 255 error = SYSCTL_OUT(req, pagesizes, len); 256 } 257 return (error); 258 } 259 SYSCTL_PROC(_hw, OID_AUTO, pagesizes, CTLTYPE_ULONG | CTLFLAG_RD, 260 NULL, 0, sysctl_hw_pagesizes, "LU", "Supported page sizes"); 261 262 #ifdef SCTL_MASK32 263 int adaptive_machine_arch = 1; 264 SYSCTL_INT(_debug, OID_AUTO, adaptive_machine_arch, CTLFLAG_RW, 265 &adaptive_machine_arch, 1, 266 "Adapt reported machine architecture to the ABI of the binary"); 267 #endif 268 269 static int 270 sysctl_hw_machine_arch(SYSCTL_HANDLER_ARGS) 271 { 272 int error; 273 static const char machine_arch[] = MACHINE_ARCH; 274 #ifdef SCTL_MASK32 275 static const char machine_arch32[] = MACHINE_ARCH32; 276 277 if ((req->flags & SCTL_MASK32) != 0 && adaptive_machine_arch) 278 error = SYSCTL_OUT(req, machine_arch32, sizeof(machine_arch32)); 279 else 280 #endif 281 error = SYSCTL_OUT(req, machine_arch, sizeof(machine_arch)); 282 return (error); 283 284 } 285 SYSCTL_PROC(_hw, HW_MACHINE_ARCH, machine_arch, CTLTYPE_STRING | CTLFLAG_RD | 286 CTLFLAG_MPSAFE, NULL, 0, sysctl_hw_machine_arch, "A", 287 "System architecture"); 288 289 SYSCTL_STRING(_kern, OID_AUTO, supported_archs, CTLFLAG_RD | CTLFLAG_MPSAFE, 290 #ifdef COMPAT_FREEBSD32 291 MACHINE_ARCH " " MACHINE_ARCH32, 0, "Supported architectures for binaries"); 292 #else 293 MACHINE_ARCH, 0, "Supported architectures for binaries"); 294 #endif 295 296 static int 297 sysctl_hostname(SYSCTL_HANDLER_ARGS) 298 { 299 struct prison *pr, *cpr; 300 size_t pr_offset; 301 char tmpname[MAXHOSTNAMELEN]; 302 int descend, error, len; 303 304 /* 305 * This function can set: hostname domainname hostuuid. 306 * Keep that in mind when comments say "hostname". 307 */ 308 pr_offset = (size_t)arg1; 309 len = arg2; 310 KASSERT(len <= sizeof(tmpname), 311 ("length %d too long for %s", len, __func__)); 312 313 pr = req->td->td_ucred->cr_prison; 314 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 315 return (EPERM); 316 /* 317 * Make a local copy of hostname to get/set so we don't have to hold 318 * the jail mutex during the sysctl copyin/copyout activities. 319 */ 320 mtx_lock(&pr->pr_mtx); 321 bcopy((char *)pr + pr_offset, tmpname, len); 322 mtx_unlock(&pr->pr_mtx); 323 324 error = sysctl_handle_string(oidp, tmpname, len, req); 325 326 if (req->newptr != NULL && error == 0) { 327 /* 328 * Copy the locally set hostname to all jails that share 329 * this host info. 330 */ 331 sx_slock(&allprison_lock); 332 while (!(pr->pr_flags & PR_HOST)) 333 pr = pr->pr_parent; 334 mtx_lock(&pr->pr_mtx); 335 bcopy(tmpname, (char *)pr + pr_offset, len); 336 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 337 if (cpr->pr_flags & PR_HOST) 338 descend = 0; 339 else 340 bcopy(tmpname, (char *)cpr + pr_offset, len); 341 mtx_unlock(&pr->pr_mtx); 342 sx_sunlock(&allprison_lock); 343 } 344 return (error); 345 } 346 347 SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, 348 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 349 (void *)(offsetof(struct prison, pr_hostname)), MAXHOSTNAMELEN, 350 sysctl_hostname, "A", "Hostname"); 351 SYSCTL_PROC(_kern, KERN_NISDOMAINNAME, domainname, 352 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 353 (void *)(offsetof(struct prison, pr_domainname)), MAXHOSTNAMELEN, 354 sysctl_hostname, "A", "Name of the current YP/NIS domain"); 355 SYSCTL_PROC(_kern, KERN_HOSTUUID, hostuuid, 356 CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE, 357 (void *)(offsetof(struct prison, pr_hostuuid)), HOSTUUIDLEN, 358 sysctl_hostname, "A", "Host UUID"); 359 360 static int regression_securelevel_nonmonotonic = 0; 361 362 #ifdef REGRESSION 363 SYSCTL_INT(_regression, OID_AUTO, securelevel_nonmonotonic, CTLFLAG_RW, 364 ®ression_securelevel_nonmonotonic, 0, "securelevel may be lowered"); 365 #endif 366 367 static int 368 sysctl_kern_securelvl(SYSCTL_HANDLER_ARGS) 369 { 370 struct prison *pr, *cpr; 371 int descend, error, level; 372 373 pr = req->td->td_ucred->cr_prison; 374 375 /* 376 * Reading the securelevel is easy, since the current jail's level 377 * is known to be at least as secure as any higher levels. Perform 378 * a lockless read since the securelevel is an integer. 379 */ 380 level = pr->pr_securelevel; 381 error = sysctl_handle_int(oidp, &level, 0, req); 382 if (error || !req->newptr) 383 return (error); 384 /* Permit update only if the new securelevel exceeds the old. */ 385 sx_slock(&allprison_lock); 386 mtx_lock(&pr->pr_mtx); 387 if (!regression_securelevel_nonmonotonic && 388 level < pr->pr_securelevel) { 389 mtx_unlock(&pr->pr_mtx); 390 sx_sunlock(&allprison_lock); 391 return (EPERM); 392 } 393 pr->pr_securelevel = level; 394 /* 395 * Set all child jails to be at least this level, but do not lower 396 * them (even if regression_securelevel_nonmonotonic). 397 */ 398 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) { 399 if (cpr->pr_securelevel < level) 400 cpr->pr_securelevel = level; 401 } 402 mtx_unlock(&pr->pr_mtx); 403 sx_sunlock(&allprison_lock); 404 return (error); 405 } 406 407 SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, 408 CTLTYPE_INT|CTLFLAG_RW|CTLFLAG_PRISON, 0, 0, sysctl_kern_securelvl, 409 "I", "Current secure level"); 410 411 #ifdef INCLUDE_CONFIG_FILE 412 /* Actual kernel configuration options. */ 413 extern char kernconfstring[]; 414 415 SYSCTL_STRING(_kern, OID_AUTO, conftxt, CTLFLAG_RD | CTLFLAG_MPSAFE, 416 kernconfstring, 0, "Kernel configuration file"); 417 #endif 418 419 static int 420 sysctl_hostid(SYSCTL_HANDLER_ARGS) 421 { 422 struct prison *pr, *cpr; 423 u_long tmpid; 424 int descend, error; 425 426 /* 427 * Like sysctl_hostname, except it operates on a u_long 428 * instead of a string, and is used only for hostid. 429 */ 430 pr = req->td->td_ucred->cr_prison; 431 if (!(pr->pr_allow & PR_ALLOW_SET_HOSTNAME) && req->newptr) 432 return (EPERM); 433 tmpid = pr->pr_hostid; 434 error = sysctl_handle_long(oidp, &tmpid, 0, req); 435 436 if (req->newptr != NULL && error == 0) { 437 sx_slock(&allprison_lock); 438 while (!(pr->pr_flags & PR_HOST)) 439 pr = pr->pr_parent; 440 mtx_lock(&pr->pr_mtx); 441 pr->pr_hostid = tmpid; 442 FOREACH_PRISON_DESCENDANT_LOCKED(pr, cpr, descend) 443 if (cpr->pr_flags & PR_HOST) 444 descend = 0; 445 else 446 cpr->pr_hostid = tmpid; 447 mtx_unlock(&pr->pr_mtx); 448 sx_sunlock(&allprison_lock); 449 } 450 return (error); 451 } 452 453 SYSCTL_PROC(_kern, KERN_HOSTID, hostid, 454 CTLTYPE_ULONG | CTLFLAG_RW | CTLFLAG_PRISON | CTLFLAG_MPSAFE | CTLFLAG_CAPRD, 455 NULL, 0, sysctl_hostid, "LU", "Host ID"); 456 457 /* 458 * The osrelease string is copied from the global (osrelease in vers.c) into 459 * prison0 by a sysinit and is inherited by child jails if not changed at jail 460 * creation, so we always return the copy from the current prison data. 461 */ 462 static int 463 sysctl_osrelease(SYSCTL_HANDLER_ARGS) 464 { 465 struct prison *pr; 466 467 pr = req->td->td_ucred->cr_prison; 468 return (SYSCTL_OUT(req, pr->pr_osrelease, strlen(pr->pr_osrelease) + 1)); 469 470 } 471 472 SYSCTL_PROC(_kern, KERN_OSRELEASE, osrelease, 473 CTLTYPE_STRING | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 474 NULL, 0, sysctl_osrelease, "A", "Operating system release"); 475 476 /* 477 * The osreldate number is copied from the global (osreldate in vers.c) into 478 * prison0 by a sysinit and is inherited by child jails if not changed at jail 479 * creation, so we always return the value from the current prison data. 480 */ 481 static int 482 sysctl_osreldate(SYSCTL_HANDLER_ARGS) 483 { 484 struct prison *pr; 485 486 pr = req->td->td_ucred->cr_prison; 487 return (SYSCTL_OUT(req, &pr->pr_osreldate, sizeof(pr->pr_osreldate))); 488 489 } 490 491 /* 492 * NOTICE: The *userland* release date is available in 493 * /usr/include/osreldate.h 494 */ 495 SYSCTL_PROC(_kern, KERN_OSRELDATE, osreldate, 496 CTLTYPE_INT | CTLFLAG_CAPRD | CTLFLAG_RD | CTLFLAG_MPSAFE, 497 NULL, 0, sysctl_osreldate, "I", "Kernel release date"); 498 499 SYSCTL_NODE(_kern, OID_AUTO, features, CTLFLAG_RD, 0, "Kernel Features"); 500 501 #ifdef COMPAT_FREEBSD4 502 FEATURE(compat_freebsd4, "Compatible with FreeBSD 4"); 503 #endif 504 505 #ifdef COMPAT_FREEBSD5 506 FEATURE(compat_freebsd5, "Compatible with FreeBSD 5"); 507 #endif 508 509 #ifdef COMPAT_FREEBSD6 510 FEATURE(compat_freebsd6, "Compatible with FreeBSD 6"); 511 #endif 512 513 #ifdef COMPAT_FREEBSD7 514 FEATURE(compat_freebsd7, "Compatible with FreeBSD 7"); 515 #endif 516 517 /* 518 * This is really cheating. These actually live in the libc, something 519 * which I'm not quite sure is a good idea anyway, but in order for 520 * getnext and friends to actually work, we define dummies here. 521 * 522 * XXXRW: These probably should be CTLFLAG_CAPRD. 523 */ 524 SYSCTL_STRING(_user, USER_CS_PATH, cs_path, CTLFLAG_RD, 525 "", 0, "PATH that finds all the standard utilities"); 526 SYSCTL_INT(_user, USER_BC_BASE_MAX, bc_base_max, CTLFLAG_RD, 527 SYSCTL_NULL_INT_PTR, 0, "Max ibase/obase values in bc(1)"); 528 SYSCTL_INT(_user, USER_BC_DIM_MAX, bc_dim_max, CTLFLAG_RD, 529 SYSCTL_NULL_INT_PTR, 0, "Max array size in bc(1)"); 530 SYSCTL_INT(_user, USER_BC_SCALE_MAX, bc_scale_max, CTLFLAG_RD, 531 SYSCTL_NULL_INT_PTR, 0, "Max scale value in bc(1)"); 532 SYSCTL_INT(_user, USER_BC_STRING_MAX, bc_string_max, CTLFLAG_RD, 533 SYSCTL_NULL_INT_PTR, 0, "Max string length in bc(1)"); 534 SYSCTL_INT(_user, USER_COLL_WEIGHTS_MAX, coll_weights_max, CTLFLAG_RD, 535 SYSCTL_NULL_INT_PTR, 0, "Maximum number of weights assigned to an LC_COLLATE locale entry"); 536 SYSCTL_INT(_user, USER_EXPR_NEST_MAX, expr_nest_max, CTLFLAG_RD, 537 SYSCTL_NULL_INT_PTR, 0, ""); 538 SYSCTL_INT(_user, USER_LINE_MAX, line_max, CTLFLAG_RD, 539 SYSCTL_NULL_INT_PTR, 0, "Max length (bytes) of a text-processing utility's input line"); 540 SYSCTL_INT(_user, USER_RE_DUP_MAX, re_dup_max, CTLFLAG_RD, 541 SYSCTL_NULL_INT_PTR, 0, "Maximum number of repeats of a regexp permitted"); 542 SYSCTL_INT(_user, USER_POSIX2_VERSION, posix2_version, CTLFLAG_RD, 543 SYSCTL_NULL_INT_PTR, 0, 544 "The version of POSIX 1003.2 with which the system attempts to comply"); 545 SYSCTL_INT(_user, USER_POSIX2_C_BIND, posix2_c_bind, CTLFLAG_RD, 546 SYSCTL_NULL_INT_PTR, 0, "Whether C development supports the C bindings option"); 547 SYSCTL_INT(_user, USER_POSIX2_C_DEV, posix2_c_dev, CTLFLAG_RD, 548 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the C development utilities option"); 549 SYSCTL_INT(_user, USER_POSIX2_CHAR_TERM, posix2_char_term, CTLFLAG_RD, 550 SYSCTL_NULL_INT_PTR, 0, ""); 551 SYSCTL_INT(_user, USER_POSIX2_FORT_DEV, posix2_fort_dev, CTLFLAG_RD, 552 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN development utilities"); 553 SYSCTL_INT(_user, USER_POSIX2_FORT_RUN, posix2_fort_run, CTLFLAG_RD, 554 SYSCTL_NULL_INT_PTR, 0, "Whether system supports FORTRAN runtime utilities"); 555 SYSCTL_INT(_user, USER_POSIX2_LOCALEDEF, posix2_localedef, CTLFLAG_RD, 556 SYSCTL_NULL_INT_PTR, 0, "Whether system supports creation of locales"); 557 SYSCTL_INT(_user, USER_POSIX2_SW_DEV, posix2_sw_dev, CTLFLAG_RD, 558 SYSCTL_NULL_INT_PTR, 0, "Whether system supports software development utilities"); 559 SYSCTL_INT(_user, USER_POSIX2_UPE, posix2_upe, CTLFLAG_RD, 560 SYSCTL_NULL_INT_PTR, 0, "Whether system supports the user portability utilities"); 561 SYSCTL_INT(_user, USER_STREAM_MAX, stream_max, CTLFLAG_RD, 562 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of streams a process may have open at one time"); 563 SYSCTL_INT(_user, USER_TZNAME_MAX, tzname_max, CTLFLAG_RD, 564 SYSCTL_NULL_INT_PTR, 0, "Min Maximum number of types supported for timezone names"); 565 566 #include <sys/vnode.h> 567 SYSCTL_INT(_debug_sizeof, OID_AUTO, vnode, CTLFLAG_RD, 568 SYSCTL_NULL_INT_PTR, sizeof(struct vnode), "sizeof(struct vnode)"); 569 570 SYSCTL_INT(_debug_sizeof, OID_AUTO, proc, CTLFLAG_RD, 571 SYSCTL_NULL_INT_PTR, sizeof(struct proc), "sizeof(struct proc)"); 572 573 static int 574 sysctl_kern_pid_max(SYSCTL_HANDLER_ARGS) 575 { 576 int error, pm; 577 578 pm = pid_max; 579 error = sysctl_handle_int(oidp, &pm, 0, req); 580 if (error || !req->newptr) 581 return (error); 582 sx_xlock(&proctree_lock); 583 sx_xlock(&allproc_lock); 584 585 /* 586 * Only permit the values less then PID_MAX. 587 * As a safety measure, do not allow to limit the pid_max too much. 588 */ 589 if (pm < 300 || pm > PID_MAX) 590 error = EINVAL; 591 else 592 pid_max = pm; 593 sx_xunlock(&allproc_lock); 594 sx_xunlock(&proctree_lock); 595 return (error); 596 } 597 SYSCTL_PROC(_kern, OID_AUTO, pid_max, CTLTYPE_INT | 598 CTLFLAG_RWTUN | CTLFLAG_NOFETCH | CTLFLAG_MPSAFE, 599 0, 0, sysctl_kern_pid_max, "I", "Maximum allowed pid"); 600 601 #include <sys/bio.h> 602 #include <sys/buf.h> 603 SYSCTL_INT(_debug_sizeof, OID_AUTO, bio, CTLFLAG_RD, 604 SYSCTL_NULL_INT_PTR, sizeof(struct bio), "sizeof(struct bio)"); 605 SYSCTL_INT(_debug_sizeof, OID_AUTO, buf, CTLFLAG_RD, 606 SYSCTL_NULL_INT_PTR, sizeof(struct buf), "sizeof(struct buf)"); 607 608 #include <sys/user.h> 609 SYSCTL_INT(_debug_sizeof, OID_AUTO, kinfo_proc, CTLFLAG_RD, 610 SYSCTL_NULL_INT_PTR, sizeof(struct kinfo_proc), "sizeof(struct kinfo_proc)"); 611 612 /* Used by kernel debuggers. */ 613 const int pcb_size = sizeof(struct pcb); 614 SYSCTL_INT(_debug_sizeof, OID_AUTO, pcb, CTLFLAG_RD, 615 SYSCTL_NULL_INT_PTR, sizeof(struct pcb), "sizeof(struct pcb)"); 616 617 /* XXX compatibility, remove for 6.0 */ 618 #include <sys/imgact.h> 619 #include <sys/imgact_elf.h> 620 SYSCTL_INT(_kern, OID_AUTO, fallback_elf_brand, CTLFLAG_RW, 621 &__elfN(fallback_brand), sizeof(__elfN(fallback_brand)), 622 "compatibility for kern.fallback_elf_brand");
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