kern_sysctl.c revision 12285
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 * 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94 37 * $Id: kern_sysctl.c,v 1.44 1995/11/14 09:22:15 phk Exp $ 38 */ 39 40/* 41 * sysctl system call. 42 */ 43 44#include <sys/param.h> 45#include <sys/systm.h> 46#include <sys/sysproto.h> 47#include <sys/kernel.h> 48#include <sys/malloc.h> 49#include <sys/proc.h> 50#include <sys/file.h> 51#include <sys/vnode.h> 52#include <sys/unistd.h> 53#include <sys/buf.h> 54#include <sys/ioctl.h> 55#include <sys/tty.h> 56#include <sys/conf.h> 57#include <vm/vm.h> 58#include <sys/sysctl.h> 59#include <sys/user.h> 60 61extern struct linker_set sysctl_; 62 63/* BEGIN_MIB */ 64SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 65 "Sysctl internal magic"); 66SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 67 "High kernel, proc, limits &c"); 68SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 69 "Virtual memory"); 70SYSCTL_NODE(, CTL_FS, fs, CTLFLAG_RW, 0, 71 "File system"); 72SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 73 "Network, (see socket.h)"); 74SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 75 "Debugging"); 76SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 77 "hardware"); 78SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 79 "machine dependent"); 80SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 81 "user-level"); 82 83SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, osrelease, 0, ""); 84 85SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 0, BSD, ""); 86 87SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, version, 0, ""); 88 89SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, ostype, 0, ""); 90 91extern int osreldate; 92SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, &osreldate, 0, ""); 93 94SYSCTL_INT(_kern, KERN_MAXVNODES, maxvnodes, CTLFLAG_RD, &desiredvnodes, 0, ""); 95 96SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, &maxproc, 0, ""); 97 98SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, 99 CTLFLAG_RD, &maxprocperuid, 0, ""); 100 101SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 0, ARG_MAX, ""); 102 103SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 0, _POSIX_VERSION, ""); 104 105SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 0, NGROUPS_MAX, ""); 106 107SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 0, 1, ""); 108 109#ifdef _POSIX_SAVED_IDS 110SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 0, 1, ""); 111#else 112SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 0, 0, ""); 113#endif 114 115char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 116 117SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, 118 CTLFLAG_RW, kernelname, sizeof kernelname, ""); 119 120SYSCTL_STRUCT(_kern, KERN_BOOTTIME, boottime, 121 CTLFLAG_RW, &boottime, timeval, ""); 122 123SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 124 125SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, cpu_model, 0, ""); 126 127SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 0, 1, ""); 128 129SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 0, BYTE_ORDER, ""); 130 131SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 0, PAGE_SIZE, ""); 132 133/* END_MIB */ 134 135extern int vfs_update_wakeup; 136extern int vfs_update_interval; 137static int 138sysctl_kern_updateinterval SYSCTL_HANDLER_ARGS 139{ 140 int error = sysctl_handle_int(oidp, 141 oidp->oid_arg1, oidp->oid_arg2, req); 142 if (!error) 143 wakeup(&vfs_update_wakeup); 144 return error; 145} 146 147SYSCTL_PROC(_kern, KERN_UPDATEINTERVAL, update, CTLTYPE_INT|CTLFLAG_RW, 148 &vfs_update_interval, 0, sysctl_kern_updateinterval, ""); 149 150 151char hostname[MAXHOSTNAMELEN]; 152int hostnamelen; 153static int 154sysctl_kern_hostname SYSCTL_HANDLER_ARGS 155{ 156 int error = sysctl_handle_string(oidp, 157 oidp->oid_arg1, oidp->oid_arg2, req); 158 if (req->newptr && (error == 0 || error == ENOMEM)) 159 hostnamelen = req->newlen; 160 return error; 161} 162 163SYSCTL_PROC(_kern, KERN_HOSTNAME, hostname, CTLTYPE_STRING|CTLFLAG_RW, 164 &hostname, sizeof(hostname), sysctl_kern_hostname, ""); 165 166static int 167sysctl_order_cmp(const void *a, const void *b) 168{ 169 const struct sysctl_oid **pa, **pb; 170 171 pa = (const struct sysctl_oid **)a; 172 pb = (const struct sysctl_oid **)b; 173 if (*pa == NULL) 174 return (1); 175 if (*pb == NULL) 176 return (-1); 177 return ((*pa)->oid_number - (*pb)->oid_number); 178} 179 180static void 181sysctl_order(void *arg) 182{ 183 int j; 184 struct linker_set *l = (struct linker_set *) arg; 185 struct sysctl_oid **oidpp; 186 187 j = l->ls_length; 188 oidpp = (struct sysctl_oid **) l->ls_items; 189 for (; j--; oidpp++) { 190 if (!*oidpp) 191 continue; 192 if ((*oidpp)->oid_arg1 == arg) { 193 *oidpp = 0; 194 continue; 195 } 196 if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) 197 if (!(*oidpp)->oid_handler) 198 sysctl_order((*oidpp)->oid_arg1); 199 } 200 qsort(l->ls_items, l->ls_length, sizeof l->ls_items[0], 201 sysctl_order_cmp); 202} 203 204SYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_order, &sysctl_); 205 206static void 207sysctl_sysctl_debug_dump_node(struct linker_set *l, int i) 208{ 209 int j, k; 210 struct sysctl_oid **oidpp; 211 212 j = l->ls_length; 213 oidpp = (struct sysctl_oid **) l->ls_items; 214 for (; j--; oidpp++) { 215 216 if (!*oidpp) 217 continue; 218 219 for (k=0; k<i; k++) 220 printf(" "); 221 222 if ((*oidpp)->oid_number > 100) { 223 printf("Junk! %p # %d %s k %x a1 %p a2 %x h %p\n", 224 *oidpp, 225 (*oidpp)->oid_number, (*oidpp)->oid_name, 226 (*oidpp)->oid_kind, (*oidpp)->oid_arg1, 227 (*oidpp)->oid_arg2, (*oidpp)->oid_handler); 228 continue; 229 } 230 printf("%d %s ", (*oidpp)->oid_number, (*oidpp)->oid_name); 231 232 printf("%c%c", 233 (*oidpp)->oid_kind & CTLFLAG_RD ? 'R':' ', 234 (*oidpp)->oid_kind & CTLFLAG_WR ? 'W':' '); 235 236 switch ((*oidpp)->oid_kind & CTLTYPE) { 237 case CTLTYPE_NODE: 238 if ((*oidpp)->oid_handler) { 239 printf(" Node(proc)\n"); 240 } else { 241 printf(" Node\n"); 242 sysctl_sysctl_debug_dump_node( 243 (*oidpp)->oid_arg1, i+2); 244 } 245 break; 246 case CTLTYPE_INT: printf(" Int\n"); break; 247 case CTLTYPE_STRING: printf(" String\n"); break; 248 case CTLTYPE_QUAD: printf(" Quad\n"); break; 249 case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break; 250 default: printf("\n"); 251 } 252 253 } 254} 255 256 257static int 258sysctl_sysctl_debug SYSCTL_HANDLER_ARGS 259{ 260 sysctl_sysctl_debug_dump_node(&sysctl_, 0); 261 return ENOENT; 262} 263 264SYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD, 265 0, 0, sysctl_sysctl_debug, ""); 266 267char domainname[MAXHOSTNAMELEN]; 268SYSCTL_STRING(_kern, KERN_DOMAINNAME, domainname, CTLFLAG_RW, 269 &domainname, sizeof(domainname), ""); 270 271long hostid; 272/* Some trouble here, if sizeof (int) != sizeof (long) */ 273SYSCTL_INT(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, ""); 274 275/* 276 * Handle an integer, signed or unsigned. 277 * Two cases: 278 * a variable: point arg1 at it. 279 * a constant: pass it in arg2. 280 */ 281 282int 283sysctl_handle_int SYSCTL_HANDLER_ARGS 284{ 285 int error = 0; 286 287 if (arg1) 288 error = SYSCTL_OUT(req, arg1, sizeof(int)); 289 else if (arg2) 290 error = SYSCTL_OUT(req, &arg2, sizeof(int)); 291 292 if (error || !req->newptr) 293 return (error); 294 295 if (!arg1) 296 error = EPERM; 297 else 298 error = SYSCTL_IN(req, arg1, sizeof(int)); 299 return (error); 300} 301 302/* 303 * Handle our generic '\0' terminated 'C' string. 304 * Two cases: 305 * a variable string: point arg1 at it, arg2 is max length. 306 * a constant string: point arg1 at it, arg2 is zero. 307 */ 308 309int 310sysctl_handle_string SYSCTL_HANDLER_ARGS 311{ 312 int error=0; 313 314 if (arg2) 315 error = SYSCTL_OUT(req, arg1, arg2); 316 else 317 error = SYSCTL_OUT(req, arg1, strlen((char *)arg1)+1); 318 319 if (error || !req->newptr || !arg2) 320 return (error); 321 322 if ((req->newlen - req->newidx) > arg2) { 323 error = E2BIG; 324 } else { 325 arg2 = (req->newlen - req->newidx); 326 error = SYSCTL_IN(req, arg1, arg2); 327 ((char *)arg1)[arg2] = '\0'; 328 } 329 330 return (error); 331} 332 333/* 334 * Handle any kind of opaque data. 335 * arg1 points to it, arg2 is the size. 336 */ 337 338int 339sysctl_handle_opaque SYSCTL_HANDLER_ARGS 340{ 341 int error; 342 343 error = SYSCTL_OUT(req, arg1, arg2); 344 345 if (error || !req->newptr) 346 return (error); 347 348 error = SYSCTL_IN(req, arg1, arg2); 349 350 return (error); 351} 352 353/* 354 * Transfer functions to/from kernel space. 355 * XXX: rather untested at this point 356 */ 357static int 358sysctl_old_kernel(struct sysctl_req *req, void *p, int l) 359{ 360 int i = 0; 361 362 if (req->oldptr) { 363 i = min(req->oldlen - req->oldidx, l); 364 if (i > 0) 365 bcopy(p, req->oldptr + req->oldidx, i); 366 } 367 req->oldidx += l; 368 if (i != l) 369 return (ENOMEM); 370 return (0); 371 372} 373 374static int 375sysctl_new_kernel(struct sysctl_req *req, void *p, int l) 376{ 377 if (!req->newptr) 378 return 0; 379 if (req->newlen - req->newidx < l) 380 return (EINVAL); 381 bcopy(req->newptr + req->newidx, p, l); 382 req->newidx += l; 383 return (0); 384} 385 386/* 387 * Transfer function to/from user space. 388 */ 389static int 390sysctl_old_user(struct sysctl_req *req, void *p, int l) 391{ 392 int error = 0, i = 0; 393 394 if (req->oldptr) { 395 i = min(req->oldlen - req->oldidx, l); 396 if (i > 0) 397 error = copyout(p, req->oldptr + req->oldidx, i); 398 } 399 req->oldidx += l; 400 if (error) 401 return (error); 402 if (req->oldptr && i < l) 403 return (ENOMEM); 404 return (0); 405} 406 407static int 408sysctl_new_user(struct sysctl_req *req, void *p, int l) 409{ 410 int error; 411 412 if (!req->newptr) 413 return 0; 414 if (req->newlen - req->newidx < l) 415 return (EINVAL); 416 error = copyin(req->newptr + req->newidx, p, l); 417 req->newidx += l; 418 return (error); 419} 420 421/* 422 * Locking and stats 423 */ 424static struct sysctl_lock { 425 int sl_lock; 426 int sl_want; 427 int sl_locked; 428} memlock; 429 430 431 432/* 433 * Traverse our tree, and find the right node, execute whatever it points 434 * at, and return the resulting error code. 435 * We work entirely in kernel-space at this time. 436 */ 437 438 439int 440sysctl_root SYSCTL_HANDLER_ARGS 441{ 442 int *name = (int *) arg1; 443 int namelen = arg2; 444 int indx, i, j; 445 struct sysctl_oid **oidpp; 446 struct linker_set *lsp = &sysctl_; 447 448 j = lsp->ls_length; 449 oidpp = (struct sysctl_oid **) lsp->ls_items; 450 451 indx = 0; 452 while (j-- && indx < CTL_MAXNAME) { 453 if (*oidpp && ((*oidpp)->oid_number == name[indx])) { 454 indx++; 455 if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 456 if ((*oidpp)->oid_handler) 457 goto found; 458 if (indx == namelen) 459 return ENOENT; 460 lsp = (struct linker_set*)(*oidpp)->oid_arg1; 461 j = lsp->ls_length; 462 oidpp = (struct sysctl_oid **)lsp->ls_items; 463 } else { 464 if (indx != namelen) 465 return EISDIR; 466 goto found; 467 } 468 } else { 469 oidpp++; 470 } 471 } 472 return ENOENT; 473found: 474 475 /* If writing isn't allowed */ 476 if (req->newptr && !((*oidpp)->oid_kind & CTLFLAG_WR)) 477 return (EPERM); 478 479 if (!(*oidpp)->oid_handler) 480 return EINVAL; 481 482 if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 483 i = ((*oidpp)->oid_handler) (*oidpp, 484 name + indx, namelen - indx, 485 req); 486 } else { 487 i = ((*oidpp)->oid_handler) (*oidpp, 488 (*oidpp)->oid_arg1, (*oidpp)->oid_arg2, 489 req); 490 } 491 return (i); 492} 493 494#ifndef _SYS_SYSPROTO_H_ 495struct sysctl_args { 496 int *name; 497 u_int namelen; 498 void *old; 499 size_t *oldlenp; 500 void *new; 501 size_t newlen; 502}; 503#endif 504 505int 506__sysctl(p, uap, retval) 507 struct proc *p; 508 register struct sysctl_args *uap; 509 int *retval; 510{ 511 int error, i, j, name[CTL_MAXNAME]; 512 513 if (uap->namelen > CTL_MAXNAME || uap->namelen < 2) 514 return (EINVAL); 515 516 error = copyin(uap->name, &name, uap->namelen * sizeof(int)); 517 if (error) 518 return (error); 519 520 error = userland_sysctl(p, name, uap->namelen, 521 uap->old, uap->oldlenp, 0, 522 uap->new, uap->newlen, &j); 523 if (error && error != ENOMEM) 524 return (error); 525 if (uap->oldlenp) { 526 i = copyout(&j, uap->oldlenp, sizeof(j)); 527 if (i) 528 return (i); 529 } 530 return (error); 531} 532 533static sysctlfn kern_sysctl; 534 535/* 536 * This is used from various compatibility syscalls too. That's why name 537 * must be in kernel space. 538 */ 539int 540userland_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, int inkernel, void *new, size_t newlen, int *retval) 541{ 542 int error = 0, dolock = 1, oldlen = 0; 543 u_int savelen = 0; 544 sysctlfn *fn; 545 struct sysctl_req req; 546 547 bzero(&req, sizeof req); 548 549 req.p = p; 550 551 if (new != NULL && (error = suser(p->p_ucred, &p->p_acflag))) 552 return (error); 553 554 if (oldlenp) { 555 if (inkernel) { 556 req.oldlen = *oldlenp; 557 } else { 558 error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp)); 559 if (error) 560 return (error); 561 } 562 } 563 564 if (old) { 565 if (!useracc(old, req.oldlen, B_WRITE)) 566 return (EFAULT); 567 req.oldptr= old; 568 } 569 570 if (newlen) { 571 if (!useracc(new, req.newlen, B_READ)) 572 return (EFAULT); 573 req.newlen = newlen; 574 req.newptr = new; 575 } 576 577 req.oldfunc = sysctl_old_user; 578 req.newfunc = sysctl_new_user; 579 580 error = sysctl_root(0, name, namelen, &req); 581 582/* 583 if (error && error != ENOMEM) 584 return (error); 585*/ 586 if (error == ENOENT) 587 goto oldstuff; 588 589 if (retval) { 590 if (req.oldptr && req.oldidx > req.oldlen) 591 *retval = req.oldlen; 592 else 593 *retval = req.oldidx; 594 } 595 return (error); 596 597oldstuff: 598 oldlen = req.oldlen; 599 600 switch (name[0]) { 601 case CTL_KERN: 602 fn = kern_sysctl; 603 if (name[1] != KERN_VNODE) /* XXX */ 604 dolock = 0; 605 break; 606 case CTL_HW: 607 fn = hw_sysctl; 608 break; 609 case CTL_VM: 610 fn = vm_sysctl; 611 break; 612 case CTL_NET: 613 fn = net_sysctl; 614 break; 615 case CTL_FS: 616 fn = fs_sysctl; 617 break; 618#ifdef DEBUG 619 case CTL_DEBUG: 620 fn = debug_sysctl; 621 break; 622#endif 623 default: 624 return (EOPNOTSUPP); 625 } 626 if (old != NULL) { 627 if (!useracc(old, oldlen, B_WRITE)) 628 return (EFAULT); 629 while (memlock.sl_lock) { 630 memlock.sl_want = 1; 631 (void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0); 632 memlock.sl_locked++; 633 } 634 memlock.sl_lock = 1; 635 if (dolock) 636 vslock(old, oldlen); 637 savelen = oldlen; 638 } 639 640 641 error = (*fn)(name + 1, namelen - 1, old, &oldlen, 642 new, newlen, p); 643 644 645 if (old != NULL) { 646 if (dolock) 647 vsunlock(old, savelen, B_WRITE); 648 memlock.sl_lock = 0; 649 if (memlock.sl_want) { 650 memlock.sl_want = 0; 651 wakeup((caddr_t)&memlock); 652 } 653 } 654#if 0 655 if (error) { 656 printf("SYSCTL_ERROR: "); 657 for(i=0;i<namelen;i++) 658 printf("%d ", name[i]); 659 printf("= %d\n", error); 660 } 661#endif 662 if (error) 663 return (error); 664 if (retval) 665 *retval = oldlen; 666 return (error); 667} 668 669/* 670 * Attributes stored in the kernel. 671 */ 672int securelevel = -1; 673 674/* 675 * kernel related system variables. 676 */ 677static int 678kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 679 int *name; 680 u_int namelen; 681 void *oldp; 682 size_t *oldlenp; 683 void *newp; 684 size_t newlen; 685 struct proc *p; 686{ 687 688 /* all sysctl names at this level are terminal */ 689 if (namelen != 1 && !(name[0] == KERN_PROC || name[0] == KERN_PROF 690 || name[0] == KERN_NTP_PLL)) 691 return (ENOTDIR); /* overloaded */ 692 693 switch (name[0]) { 694 695 case KERN_VNODE: 696 return (sysctl_vnode(oldp, oldlenp)); 697#ifdef GPROF 698 case KERN_PROF: 699 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 700 newp, newlen)); 701#endif 702 default: 703 return (EOPNOTSUPP); 704 } 705 /* NOTREACHED */ 706} 707 708static int 709sysctl_kern_securelvl SYSCTL_HANDLER_ARGS 710{ 711 int error, level; 712 713 level = securelevel; 714 error = sysctl_handle_int(oidp, &level, 0, req); 715 if (error || !req->newptr) 716 return (error); 717 if (level < securelevel && req->p->p_pid != 1) 718 return (EPERM); 719 securelevel = level; 720 return (error); 721} 722 723SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW, 724 0, 0, sysctl_kern_securelvl, ""); 725 726static int 727sysctl_kern_dumpdev SYSCTL_HANDLER_ARGS 728{ 729 int error; 730 dev_t ndumpdev; 731 732 ndumpdev = dumpdev; 733 error = sysctl_handle_opaque(oidp, &ndumpdev, sizeof ndumpdev, req); 734 if (!error && ndumpdev != dumpdev) { 735 error = setdumpdev(ndumpdev); 736 } 737 return (error); 738} 739 740SYSCTL_PROC(_kern, KERN_DUMPDEV, dumpdev, CTLTYPE_OPAQUE|CTLFLAG_RW, 741 0, sizeof dumpdev, sysctl_kern_dumpdev, ""); 742/* 743 * hardware related system variables. 744 */ 745int 746hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 747 int *name; 748 u_int namelen; 749 void *oldp; 750 size_t *oldlenp; 751 void *newp; 752 size_t newlen; 753 struct proc *p; 754{ 755 /* almost all sysctl names at this level are terminal */ 756 if (namelen != 1 && name[0] != HW_DEVCONF) 757 return (ENOTDIR); /* overloaded */ 758 759 switch (name[0]) { 760 case HW_PHYSMEM: 761 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 762 case HW_USERMEM: 763 return (sysctl_rdint(oldp, oldlenp, newp, 764 ctob(physmem - cnt.v_wire_count))); 765 case HW_DEVCONF: 766 return (dev_sysctl(name + 1, namelen - 1, oldp, oldlenp, 767 newp, newlen, p)); 768 default: 769 return (EOPNOTSUPP); 770 } 771 /* NOTREACHED */ 772} 773 774#ifdef DEBUG 775/* 776 * Debugging related system variables. 777 */ 778struct ctldebug debug0, debug1, debug2, debug3, debug4; 779struct ctldebug debug5, debug6, debug7, debug8, debug9; 780struct ctldebug debug10, debug11, debug12, debug13, debug14; 781struct ctldebug debug15, debug16, debug17, debug18, debug19; 782static struct ctldebug *debugvars[CTL_DEBUG_MAXID] = { 783 &debug0, &debug1, &debug2, &debug3, &debug4, 784 &debug5, &debug6, &debug7, &debug8, &debug9, 785 &debug10, &debug11, &debug12, &debug13, &debug14, 786 &debug15, &debug16, &debug17, &debug18, &debug19, 787}; 788static int 789debug_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 790 int *name; 791 u_int namelen; 792 void *oldp; 793 size_t *oldlenp; 794 void *newp; 795 size_t newlen; 796 struct proc *p; 797{ 798 struct ctldebug *cdp; 799 800 /* all sysctl names at this level are name and field */ 801 if (namelen != 2) 802 return (ENOTDIR); /* overloaded */ 803 cdp = debugvars[name[0]]; 804 if (cdp->debugname == 0) 805 return (EOPNOTSUPP); 806 switch (name[1]) { 807 case CTL_DEBUG_NAME: 808 return (sysctl_rdstring(oldp, oldlenp, newp, cdp->debugname)); 809 case CTL_DEBUG_VALUE: 810 return (sysctl_int(oldp, oldlenp, newp, newlen, cdp->debugvar)); 811 default: 812 return (EOPNOTSUPP); 813 } 814 /* NOTREACHED */ 815} 816#endif /* DEBUG */ 817 818/* 819 * Validate parameters and get old / set new parameters 820 * for an integer-valued sysctl function. 821 */ 822int 823sysctl_int(oldp, oldlenp, newp, newlen, valp) 824 void *oldp; 825 size_t *oldlenp; 826 void *newp; 827 size_t newlen; 828 int *valp; 829{ 830 int error = 0; 831 832 if (oldp && *oldlenp < sizeof(int)) 833 return (ENOMEM); 834 if (newp && newlen != sizeof(int)) 835 return (EINVAL); 836 *oldlenp = sizeof(int); 837 if (oldp) 838 error = copyout(valp, oldp, sizeof(int)); 839 if (error == 0 && newp) 840 error = copyin(newp, valp, sizeof(int)); 841 return (error); 842} 843 844/* 845 * As above, but read-only. 846 */ 847int 848sysctl_rdint(oldp, oldlenp, newp, val) 849 void *oldp; 850 size_t *oldlenp; 851 void *newp; 852 int val; 853{ 854 int error = 0; 855 856 if (oldp && *oldlenp < sizeof(int)) 857 return (ENOMEM); 858 if (newp) 859 return (EPERM); 860 *oldlenp = sizeof(int); 861 if (oldp) 862 error = copyout((caddr_t)&val, oldp, sizeof(int)); 863 return (error); 864} 865 866/* 867 * Validate parameters and get old / set new parameters 868 * for a string-valued sysctl function. 869 */ 870int 871sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 872 void *oldp; 873 size_t *oldlenp; 874 void *newp; 875 size_t newlen; 876 char *str; 877 int maxlen; 878{ 879 int len, error = 0, rval = 0; 880 881 len = strlen(str) + 1; 882 if (oldp && *oldlenp < len) { 883 len = *oldlenp; 884 rval = ENOMEM; 885 } 886 if (newp && newlen >= maxlen) 887 return (EINVAL); 888 if (oldp) { 889 *oldlenp = len; 890 error = copyout(str, oldp, len); 891 if (error) 892 rval = error; 893 } 894 if ((error == 0 || error == ENOMEM) && newp) { 895 error = copyin(newp, str, newlen); 896 if (error) 897 rval = error; 898 str[newlen] = 0; 899 } 900 return (rval); 901} 902 903/* 904 * As above, but read-only. 905 */ 906int 907sysctl_rdstring(oldp, oldlenp, newp, str) 908 void *oldp; 909 size_t *oldlenp; 910 void *newp; 911 char *str; 912{ 913 int len, error = 0, rval = 0; 914 915 len = strlen(str) + 1; 916 if (oldp && *oldlenp < len) { 917 len = *oldlenp; 918 rval = ENOMEM; 919 } 920 if (newp) 921 return (EPERM); 922 *oldlenp = len; 923 if (oldp) 924 error = copyout(str, oldp, len); 925 if (error) 926 rval = error; 927 return (rval); 928} 929 930/* 931 * Validate parameters and get old / set new parameters 932 * for a structure oriented sysctl function. 933 */ 934int 935sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 936 void *oldp; 937 size_t *oldlenp; 938 void *newp; 939 size_t newlen; 940 void *sp; 941 int len; 942{ 943 int error = 0; 944 945 if (oldp && *oldlenp < len) 946 return (ENOMEM); 947 if (newp && newlen > len) 948 return (EINVAL); 949 if (oldp) { 950 *oldlenp = len; 951 error = copyout(sp, oldp, len); 952 } 953 if (error == 0 && newp) 954 error = copyin(newp, sp, len); 955 return (error); 956} 957 958/* 959 * Validate parameters and get old parameters 960 * for a structure oriented sysctl function. 961 */ 962int 963sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 964 void *oldp; 965 size_t *oldlenp; 966 void *newp, *sp; 967 int len; 968{ 969 int error = 0; 970 971 if (oldp && *oldlenp < len) 972 return (ENOMEM); 973 if (newp) 974 return (EPERM); 975 *oldlenp = len; 976 if (oldp) 977 error = copyout(sp, oldp, len); 978 return (error); 979} 980 981#ifdef COMPAT_43 982#include <sys/socket.h> 983#define KINFO_PROC (0<<8) 984#define KINFO_RT (1<<8) 985#define KINFO_VNODE (2<<8) 986#define KINFO_FILE (3<<8) 987#define KINFO_METER (4<<8) 988#define KINFO_LOADAVG (5<<8) 989#define KINFO_CLOCKRATE (6<<8) 990 991/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 992#define KINFO_BSDI_SYSINFO (101<<8) 993 994/* 995 * XXX this is bloat, but I hope it's better here than on the potentially 996 * limited kernel stack... -Peter 997 */ 998 999struct { 1000 int bsdi_machine; /* "i386" on BSD/386 */ 1001/* ^^^ this is an offset to the string, relative to the struct start */ 1002 char *pad0; 1003 long pad1; 1004 long pad2; 1005 long pad3; 1006 u_long pad4; 1007 u_long pad5; 1008 u_long pad6; 1009 1010 int bsdi_ostype; /* "BSD/386" on BSD/386 */ 1011 int bsdi_osrelease; /* "1.1" on BSD/386 */ 1012 long pad7; 1013 long pad8; 1014 char *pad9; 1015 1016 long pad10; 1017 long pad11; 1018 int pad12; 1019 long pad13; 1020 quad_t pad14; 1021 long pad15; 1022 1023 struct timeval pad16; 1024 /* we dont set this, because BSDI's uname used gethostname() instead */ 1025 int bsdi_hostname; /* hostname on BSD/386 */ 1026 1027 /* the actual string data is appended here */ 1028 1029} bsdi_si; 1030/* 1031 * this data is appended to the end of the bsdi_si structure during copyout. 1032 * The "char *" offsets are relative to the base of the bsdi_si struct. 1033 * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 1034 * should not exceed the length of the buffer here... (or else!! :-) 1035 */ 1036char bsdi_strings[80]; /* It had better be less than this! */ 1037 1038#ifndef _SYS_SYSPROTO_H_ 1039struct getkerninfo_args { 1040 int op; 1041 char *where; 1042 int *size; 1043 int arg; 1044}; 1045#endif 1046 1047int 1048ogetkerninfo(p, uap, retval) 1049 struct proc *p; 1050 register struct getkerninfo_args *uap; 1051 int *retval; 1052{ 1053 int error, name[6]; 1054 u_int size; 1055 1056 switch (uap->op & 0xff00) { 1057 1058 case KINFO_RT: 1059 name[0] = CTL_NET; 1060 name[1] = PF_ROUTE; 1061 name[2] = 0; 1062 name[3] = (uap->op & 0xff0000) >> 16; 1063 name[4] = uap->op & 0xff; 1064 name[5] = uap->arg; 1065 error = userland_sysctl(p, name, 6, uap->where, uap->size, 1066 0, 0, 0, 0); 1067 break; 1068 1069 case KINFO_VNODE: 1070 name[0] = CTL_KERN; 1071 name[1] = KERN_VNODE; 1072 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1073 0, 0, 0, 0); 1074 break; 1075 1076 case KINFO_PROC: 1077 name[0] = CTL_KERN; 1078 name[1] = KERN_PROC; 1079 name[2] = uap->op & 0xff; 1080 name[3] = uap->arg; 1081 error = userland_sysctl(p, name, 4, uap->where, uap->size, 1082 0, 0, 0, 0); 1083 break; 1084 1085 case KINFO_FILE: 1086 name[0] = CTL_KERN; 1087 name[1] = KERN_FILE; 1088 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1089 0, 0, 0, 0); 1090 break; 1091 1092 case KINFO_METER: 1093 name[0] = CTL_VM; 1094 name[1] = VM_METER; 1095 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1096 0, 0, 0, 0); 1097 break; 1098 1099 case KINFO_LOADAVG: 1100 name[0] = CTL_VM; 1101 name[1] = VM_LOADAVG; 1102 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1103 0, 0, 0, 0); 1104 break; 1105 1106 case KINFO_CLOCKRATE: 1107 name[0] = CTL_KERN; 1108 name[1] = KERN_CLOCKRATE; 1109 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1110 0, 0, 0, 0); 1111 break; 1112 1113 case KINFO_BSDI_SYSINFO: { 1114 /* 1115 * this is pretty crude, but it's just enough for uname() 1116 * from BSDI's 1.x libc to work. 1117 * 1118 * In particular, it doesn't return the same results when 1119 * the supplied buffer is too small. BSDI's version apparently 1120 * will return the amount copied, and set the *size to how 1121 * much was needed. The emulation framework here isn't capable 1122 * of that, so we just set both to the amount copied. 1123 * BSDI's 2.x product apparently fails with ENOMEM in this 1124 * scenario. 1125 */ 1126 1127 u_int needed; 1128 u_int left; 1129 char *s; 1130 1131 bzero((char *)&bsdi_si, sizeof(bsdi_si)); 1132 bzero(bsdi_strings, sizeof(bsdi_strings)); 1133 1134 s = bsdi_strings; 1135 1136 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 1137 strcpy(s, ostype); 1138 s += strlen(s) + 1; 1139 1140 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 1141 strcpy(s, osrelease); 1142 s += strlen(s) + 1; 1143 1144 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 1145 strcpy(s, machine); 1146 s += strlen(s) + 1; 1147 1148 needed = sizeof(bsdi_si) + (s - bsdi_strings); 1149 1150 if (uap->where == NULL) { 1151 /* process is asking how much buffer to supply.. */ 1152 size = needed; 1153 error = 0; 1154 break; 1155 } 1156 1157 1158 /* if too much buffer supplied, trim it down */ 1159 if (size > needed) 1160 size = needed; 1161 1162 /* how much of the buffer is remaining */ 1163 left = size; 1164 1165 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 1166 break; 1167 1168 /* is there any point in continuing? */ 1169 if (left > sizeof(bsdi_si)) { 1170 left -= sizeof(bsdi_si); 1171 error = copyout(&bsdi_strings, 1172 uap->where + sizeof(bsdi_si), left); 1173 } 1174 break; 1175 } 1176 1177 default: 1178 return (EOPNOTSUPP); 1179 } 1180 if (error) 1181 return (error); 1182 *retval = size; 1183 if (uap->size) 1184 error = copyout((caddr_t)&size, (caddr_t)uap->size, 1185 sizeof(size)); 1186 return (error); 1187} 1188#endif /* COMPAT_43 */ 1189