kern_sysctl.c revision 12297
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 1.49 1995/11/14 09:42:22 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/vnode.h> 49#include <sys/unistd.h> 50#include <sys/conf.h> 51#include <sys/sysctl.h> 52 53extern struct linker_set sysctl_; 54 55/* BEGIN_MIB */ 56SYSCTL_NODE(, 0, sysctl, CTLFLAG_RW, 0, 57 "Sysctl internal magic"); 58SYSCTL_NODE(, CTL_KERN, kern, CTLFLAG_RW, 0, 59 "High kernel, proc, limits &c"); 60SYSCTL_NODE(, CTL_VM, vm, CTLFLAG_RW, 0, 61 "Virtual memory"); 62SYSCTL_NODE(, CTL_FS, fs, CTLFLAG_RW, 0, 63 "File system"); 64SYSCTL_NODE(, CTL_NET, net, CTLFLAG_RW, 0, 65 "Network, (see socket.h)"); 66SYSCTL_NODE(, CTL_DEBUG, debug, CTLFLAG_RW, 0, 67 "Debugging"); 68SYSCTL_NODE(, CTL_HW, hw, CTLFLAG_RW, 0, 69 "hardware"); 70SYSCTL_NODE(, CTL_MACHDEP, machdep, CTLFLAG_RW, 0, 71 "machine dependent"); 72SYSCTL_NODE(, CTL_USER, user, CTLFLAG_RW, 0, 73 "user-level"); 74 75SYSCTL_STRING(_kern, KERN_OSRELEASE, osrelease, CTLFLAG_RD, osrelease, 0, ""); 76 77SYSCTL_INT(_kern, KERN_OSREV, osrevision, CTLFLAG_RD, 0, BSD, ""); 78 79SYSCTL_STRING(_kern, KERN_VERSION, version, CTLFLAG_RD, version, 0, ""); 80 81SYSCTL_STRING(_kern, KERN_OSTYPE, ostype, CTLFLAG_RD, ostype, 0, ""); 82 83extern int osreldate; 84SYSCTL_INT(_kern, KERN_OSRELDATE, osreldate, CTLFLAG_RD, &osreldate, 0, ""); 85 86SYSCTL_INT(_kern, KERN_MAXVNODES, maxvnodes, CTLFLAG_RD, &desiredvnodes, 0, ""); 87 88SYSCTL_INT(_kern, KERN_MAXPROC, maxproc, CTLFLAG_RD, &maxproc, 0, ""); 89 90SYSCTL_INT(_kern, KERN_MAXPROCPERUID, maxprocperuid, 91 CTLFLAG_RD, &maxprocperuid, 0, ""); 92 93SYSCTL_INT(_kern, KERN_ARGMAX, argmax, CTLFLAG_RD, 0, ARG_MAX, ""); 94 95SYSCTL_INT(_kern, KERN_POSIX1, posix1version, CTLFLAG_RD, 0, _POSIX_VERSION, ""); 96 97SYSCTL_INT(_kern, KERN_NGROUPS, ngroups, CTLFLAG_RD, 0, NGROUPS_MAX, ""); 98 99SYSCTL_INT(_kern, KERN_JOB_CONTROL, job_control, CTLFLAG_RD, 0, 1, ""); 100 101#ifdef _POSIX_SAVED_IDS 102SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 0, 1, ""); 103#else 104SYSCTL_INT(_kern, KERN_SAVED_IDS, saved_ids, CTLFLAG_RD, 0, 0, ""); 105#endif 106 107char kernelname[MAXPATHLEN] = "/kernel"; /* XXX bloat */ 108 109SYSCTL_STRING(_kern, KERN_BOOTFILE, bootfile, 110 CTLFLAG_RW, kernelname, sizeof kernelname, ""); 111 112SYSCTL_STRUCT(_kern, KERN_BOOTTIME, boottime, 113 CTLFLAG_RW, &boottime, timeval, ""); 114 115SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, ""); 116 117SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, cpu_model, 0, ""); 118 119SYSCTL_INT(_hw, HW_NCPU, ncpu, CTLFLAG_RD, 0, 1, ""); 120 121SYSCTL_INT(_hw, HW_BYTEORDER, byteorder, CTLFLAG_RD, 0, BYTE_ORDER, ""); 122 123SYSCTL_INT(_hw, HW_PAGESIZE, pagesize, CTLFLAG_RD, 0, PAGE_SIZE, ""); 124 125/* END_MIB */ 126 127extern int vfs_update_wakeup; 128extern int vfs_update_interval; 129static int 130sysctl_kern_updateinterval SYSCTL_HANDLER_ARGS 131{ 132 int error = sysctl_handle_int(oidp, 133 oidp->oid_arg1, oidp->oid_arg2, req); 134 if (!error) 135 wakeup(&vfs_update_wakeup); 136 return error; 137} 138 139SYSCTL_PROC(_kern, KERN_UPDATEINTERVAL, update, CTLTYPE_INT|CTLFLAG_RW, 140 &vfs_update_interval, 0, sysctl_kern_updateinterval, ""); 141 142 143char hostname[MAXHOSTNAMELEN]; 144 145SYSCTL_STRING(_kern, KERN_HOSTNAME, hostname, CTLFLAG_RW, 146 hostname, sizeof(hostname), ""); 147 148static int 149sysctl_order_cmp(const void *a, const void *b) 150{ 151 const struct sysctl_oid **pa, **pb; 152 153 pa = (const struct sysctl_oid **)a; 154 pb = (const struct sysctl_oid **)b; 155 if (*pa == NULL) 156 return (1); 157 if (*pb == NULL) 158 return (-1); 159 return ((*pa)->oid_number - (*pb)->oid_number); 160} 161 162static void 163sysctl_order(void *arg) 164{ 165 int j; 166 struct linker_set *l = (struct linker_set *) arg; 167 struct sysctl_oid **oidpp; 168 169 j = l->ls_length; 170 oidpp = (struct sysctl_oid **) l->ls_items; 171 for (; j--; oidpp++) { 172 if (!*oidpp) 173 continue; 174 if ((*oidpp)->oid_arg1 == arg) { 175 *oidpp = 0; 176 continue; 177 } 178 if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) 179 if (!(*oidpp)->oid_handler) 180 sysctl_order((*oidpp)->oid_arg1); 181 } 182 qsort(l->ls_items, l->ls_length, sizeof l->ls_items[0], 183 sysctl_order_cmp); 184} 185 186SYSINIT(sysctl, SI_SUB_KMEM, SI_ORDER_ANY, sysctl_order, &sysctl_); 187 188static void 189sysctl_sysctl_debug_dump_node(struct linker_set *l, int i) 190{ 191 int j, k; 192 struct sysctl_oid **oidpp; 193 194 j = l->ls_length; 195 oidpp = (struct sysctl_oid **) l->ls_items; 196 for (; j--; oidpp++) { 197 198 if (!*oidpp) 199 continue; 200 201 for (k=0; k<i; k++) 202 printf(" "); 203 204 if ((*oidpp)->oid_number > 100) { 205 printf("Junk! %p # %d %s k %x a1 %p a2 %x h %p\n", 206 *oidpp, 207 (*oidpp)->oid_number, (*oidpp)->oid_name, 208 (*oidpp)->oid_kind, (*oidpp)->oid_arg1, 209 (*oidpp)->oid_arg2, (*oidpp)->oid_handler); 210 continue; 211 } 212 printf("%d %s ", (*oidpp)->oid_number, (*oidpp)->oid_name); 213 214 printf("%c%c", 215 (*oidpp)->oid_kind & CTLFLAG_RD ? 'R':' ', 216 (*oidpp)->oid_kind & CTLFLAG_WR ? 'W':' '); 217 218 switch ((*oidpp)->oid_kind & CTLTYPE) { 219 case CTLTYPE_NODE: 220 if ((*oidpp)->oid_handler) { 221 printf(" Node(proc)\n"); 222 } else { 223 printf(" Node\n"); 224 sysctl_sysctl_debug_dump_node( 225 (*oidpp)->oid_arg1, i+2); 226 } 227 break; 228 case CTLTYPE_INT: printf(" Int\n"); break; 229 case CTLTYPE_STRING: printf(" String\n"); break; 230 case CTLTYPE_QUAD: printf(" Quad\n"); break; 231 case CTLTYPE_OPAQUE: printf(" Opaque/struct\n"); break; 232 default: printf("\n"); 233 } 234 235 } 236} 237 238 239static int 240sysctl_sysctl_debug SYSCTL_HANDLER_ARGS 241{ 242 sysctl_sysctl_debug_dump_node(&sysctl_, 0); 243 return ENOENT; 244} 245 246SYSCTL_PROC(_sysctl, 0, debug, CTLTYPE_STRING|CTLFLAG_RD, 247 0, 0, sysctl_sysctl_debug, ""); 248 249char domainname[MAXHOSTNAMELEN]; 250SYSCTL_STRING(_kern, KERN_DOMAINNAME, domainname, CTLFLAG_RW, 251 &domainname, sizeof(domainname), ""); 252 253long hostid; 254/* Some trouble here, if sizeof (int) != sizeof (long) */ 255SYSCTL_INT(_kern, KERN_HOSTID, hostid, CTLFLAG_RW, &hostid, 0, ""); 256 257/* 258 * Handle an integer, signed or unsigned. 259 * Two cases: 260 * a variable: point arg1 at it. 261 * a constant: pass it in arg2. 262 */ 263 264int 265sysctl_handle_int SYSCTL_HANDLER_ARGS 266{ 267 int error = 0; 268 269 if (arg1) 270 error = SYSCTL_OUT(req, arg1, sizeof(int)); 271 else if (arg2) 272 error = SYSCTL_OUT(req, &arg2, sizeof(int)); 273 274 if (error || !req->newptr) 275 return (error); 276 277 if (!arg1) 278 error = EPERM; 279 else 280 error = SYSCTL_IN(req, arg1, sizeof(int)); 281 return (error); 282} 283 284/* 285 * Handle our generic '\0' terminated 'C' string. 286 * Two cases: 287 * a variable string: point arg1 at it, arg2 is max length. 288 * a constant string: point arg1 at it, arg2 is zero. 289 */ 290 291int 292sysctl_handle_string SYSCTL_HANDLER_ARGS 293{ 294 int error=0; 295 296 error = SYSCTL_OUT(req, arg1, strlen((char *)arg1)+1); 297 298 if (error || !req->newptr || !arg2) 299 return (error); 300 301 if ((req->newlen - req->newidx) > arg2) { 302 error = E2BIG; 303 } else { 304 arg2 = (req->newlen - req->newidx); 305 error = SYSCTL_IN(req, arg1, arg2); 306 ((char *)arg1)[arg2] = '\0'; 307 } 308 309 return (error); 310} 311 312/* 313 * Handle any kind of opaque data. 314 * arg1 points to it, arg2 is the size. 315 */ 316 317int 318sysctl_handle_opaque SYSCTL_HANDLER_ARGS 319{ 320 int error; 321 322 error = SYSCTL_OUT(req, arg1, arg2); 323 324 if (error || !req->newptr) 325 return (error); 326 327 error = SYSCTL_IN(req, arg1, arg2); 328 329 return (error); 330} 331 332/* 333 * Transfer functions to/from kernel space. 334 * XXX: rather untested at this point 335 */ 336static int 337sysctl_old_kernel(struct sysctl_req *req, void *p, int l) 338{ 339 int i = 0; 340 341 if (req->oldptr) { 342 i = min(req->oldlen - req->oldidx, l); 343 if (i > 0) 344 bcopy(p, req->oldptr + req->oldidx, i); 345 } 346 req->oldidx += l; 347 if (i != l) 348 return (ENOMEM); 349 return (0); 350 351} 352 353static int 354sysctl_new_kernel(struct sysctl_req *req, void *p, int l) 355{ 356 if (!req->newptr) 357 return 0; 358 if (req->newlen - req->newidx < l) 359 return (EINVAL); 360 bcopy(req->newptr + req->newidx, p, l); 361 req->newidx += l; 362 return (0); 363} 364 365/* 366 * Transfer function to/from user space. 367 */ 368static int 369sysctl_old_user(struct sysctl_req *req, void *p, int l) 370{ 371 int error = 0, i = 0; 372 373 if (req->oldptr) { 374 i = min(req->oldlen - req->oldidx, l); 375 if (i > 0) 376 error = copyout(p, req->oldptr + req->oldidx, i); 377 } 378 req->oldidx += l; 379 if (error) 380 return (error); 381 if (req->oldptr && i < l) 382 return (ENOMEM); 383 return (0); 384} 385 386static int 387sysctl_new_user(struct sysctl_req *req, void *p, int l) 388{ 389 int error; 390 391 if (!req->newptr) 392 return 0; 393 if (req->newlen - req->newidx < l) 394 return (EINVAL); 395 error = copyin(req->newptr + req->newidx, p, l); 396 req->newidx += l; 397 return (error); 398} 399 400/* 401 * Locking and stats 402 */ 403static struct sysctl_lock { 404 int sl_lock; 405 int sl_want; 406 int sl_locked; 407} memlock; 408 409 410 411/* 412 * Traverse our tree, and find the right node, execute whatever it points 413 * at, and return the resulting error code. 414 * We work entirely in kernel-space at this time. 415 */ 416 417 418int 419sysctl_root SYSCTL_HANDLER_ARGS 420{ 421 int *name = (int *) arg1; 422 int namelen = arg2; 423 int indx, i, j; 424 struct sysctl_oid **oidpp; 425 struct linker_set *lsp = &sysctl_; 426 427 j = lsp->ls_length; 428 oidpp = (struct sysctl_oid **) lsp->ls_items; 429 430 indx = 0; 431 while (j-- && indx < CTL_MAXNAME) { 432 if (*oidpp && ((*oidpp)->oid_number == name[indx])) { 433 indx++; 434 if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 435 if ((*oidpp)->oid_handler) 436 goto found; 437 if (indx == namelen) 438 return ENOENT; 439 lsp = (struct linker_set*)(*oidpp)->oid_arg1; 440 j = lsp->ls_length; 441 oidpp = (struct sysctl_oid **)lsp->ls_items; 442 } else { 443 if (indx != namelen) 444 return EISDIR; 445 goto found; 446 } 447 } else { 448 oidpp++; 449 } 450 } 451 return ENOENT; 452found: 453 454 /* If writing isn't allowed */ 455 if (req->newptr && !((*oidpp)->oid_kind & CTLFLAG_WR)) 456 return (EPERM); 457 458 if (!(*oidpp)->oid_handler) 459 return EINVAL; 460 461 if (((*oidpp)->oid_kind & CTLTYPE) == CTLTYPE_NODE) { 462 i = ((*oidpp)->oid_handler) (*oidpp, 463 name + indx, namelen - indx, 464 req); 465 } else { 466 i = ((*oidpp)->oid_handler) (*oidpp, 467 (*oidpp)->oid_arg1, (*oidpp)->oid_arg2, 468 req); 469 } 470 return (i); 471} 472 473#ifndef _SYS_SYSPROTO_H_ 474struct sysctl_args { 475 int *name; 476 u_int namelen; 477 void *old; 478 size_t *oldlenp; 479 void *new; 480 size_t newlen; 481}; 482#endif 483 484int 485__sysctl(p, uap, retval) 486 struct proc *p; 487 register struct sysctl_args *uap; 488 int *retval; 489{ 490 int error, i, j, name[CTL_MAXNAME]; 491 492 if (uap->namelen > CTL_MAXNAME || uap->namelen < 2) 493 return (EINVAL); 494 495 error = copyin(uap->name, &name, uap->namelen * sizeof(int)); 496 if (error) 497 return (error); 498 499 error = userland_sysctl(p, name, uap->namelen, 500 uap->old, uap->oldlenp, 0, 501 uap->new, uap->newlen, &j); 502 if (error && error != ENOMEM) 503 return (error); 504 if (uap->oldlenp) { 505 i = copyout(&j, uap->oldlenp, sizeof(j)); 506 if (i) 507 return (i); 508 } 509 return (error); 510} 511 512static sysctlfn kern_sysctl; 513 514/* 515 * This is used from various compatibility syscalls too. That's why name 516 * must be in kernel space. 517 */ 518int 519userland_sysctl(struct proc *p, int *name, u_int namelen, void *old, size_t *oldlenp, int inkernel, void *new, size_t newlen, int *retval) 520{ 521 int error = 0, dolock = 1, oldlen = 0; 522 u_int savelen = 0; 523 sysctlfn *fn; 524 struct sysctl_req req; 525 526 bzero(&req, sizeof req); 527 528 req.p = p; 529 530 if (new != NULL && (error = suser(p->p_ucred, &p->p_acflag))) 531 return (error); 532 533 if (oldlenp) { 534 if (inkernel) { 535 req.oldlen = *oldlenp; 536 } else { 537 error = copyin(oldlenp, &req.oldlen, sizeof(*oldlenp)); 538 if (error) 539 return (error); 540 } 541 } 542 543 if (old) { 544 if (!useracc(old, req.oldlen, B_WRITE)) 545 return (EFAULT); 546 req.oldptr= old; 547 } 548 549 if (newlen) { 550 if (!useracc(new, req.newlen, B_READ)) 551 return (EFAULT); 552 req.newlen = newlen; 553 req.newptr = new; 554 } 555 556 req.oldfunc = sysctl_old_user; 557 req.newfunc = sysctl_new_user; 558 559 error = sysctl_root(0, name, namelen, &req); 560 561/* 562 if (error && error != ENOMEM) 563 return (error); 564*/ 565 if (error == ENOENT) 566 goto oldstuff; 567 568 if (retval) { 569 if (req.oldptr && req.oldidx > req.oldlen) 570 *retval = req.oldlen; 571 else 572 *retval = req.oldidx; 573 } 574 return (error); 575 576oldstuff: 577 oldlen = req.oldlen; 578 579 switch (name[0]) { 580 case CTL_KERN: 581 fn = kern_sysctl; 582 if (name[1] != KERN_VNODE) /* XXX */ 583 dolock = 0; 584 break; 585 case CTL_HW: 586 fn = hw_sysctl; 587 break; 588 case CTL_NET: 589 fn = net_sysctl; 590 break; 591 case CTL_FS: 592 fn = fs_sysctl; 593 break; 594 default: 595 return (EOPNOTSUPP); 596 } 597 if (old != NULL) { 598 if (!useracc(old, oldlen, B_WRITE)) 599 return (EFAULT); 600 while (memlock.sl_lock) { 601 memlock.sl_want = 1; 602 (void) tsleep((caddr_t)&memlock, PRIBIO+1, "sysctl", 0); 603 memlock.sl_locked++; 604 } 605 memlock.sl_lock = 1; 606 if (dolock) 607 vslock(old, oldlen); 608 savelen = oldlen; 609 } 610 611 612 error = (*fn)(name + 1, namelen - 1, old, &oldlen, 613 new, newlen, p); 614 615 616 if (old != NULL) { 617 if (dolock) 618 vsunlock(old, savelen, B_WRITE); 619 memlock.sl_lock = 0; 620 if (memlock.sl_want) { 621 memlock.sl_want = 0; 622 wakeup((caddr_t)&memlock); 623 } 624 } 625#if 0 626 if (error) { 627 printf("SYSCTL_ERROR: "); 628 for(i=0;i<namelen;i++) 629 printf("%d ", name[i]); 630 printf("= %d\n", error); 631 } 632#endif 633 if (error) 634 return (error); 635 if (retval) 636 *retval = oldlen; 637 return (error); 638} 639 640/* 641 * Attributes stored in the kernel. 642 */ 643int securelevel = -1; 644 645/* 646 * kernel related system variables. 647 */ 648static int 649kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 650 int *name; 651 u_int namelen; 652 void *oldp; 653 size_t *oldlenp; 654 void *newp; 655 size_t newlen; 656 struct proc *p; 657{ 658 659 /* all sysctl names at this level are terminal */ 660 if (namelen != 1 && !(name[0] == KERN_PROC || name[0] == KERN_PROF 661 || name[0] == KERN_NTP_PLL)) 662 return (ENOTDIR); /* overloaded */ 663 664 switch (name[0]) { 665 666 case KERN_VNODE: 667 return (sysctl_vnode(oldp, oldlenp)); 668#ifdef GPROF 669 case KERN_PROF: 670 return (sysctl_doprof(name + 1, namelen - 1, oldp, oldlenp, 671 newp, newlen)); 672#endif 673 default: 674 return (EOPNOTSUPP); 675 } 676 /* NOTREACHED */ 677} 678 679static int 680sysctl_kern_securelvl SYSCTL_HANDLER_ARGS 681{ 682 int error, level; 683 684 level = securelevel; 685 error = sysctl_handle_int(oidp, &level, 0, req); 686 if (error || !req->newptr) 687 return (error); 688 if (level < securelevel && req->p->p_pid != 1) 689 return (EPERM); 690 securelevel = level; 691 return (error); 692} 693 694SYSCTL_PROC(_kern, KERN_SECURELVL, securelevel, CTLTYPE_INT|CTLFLAG_RW, 695 0, 0, sysctl_kern_securelvl, ""); 696 697static int 698sysctl_kern_dumpdev SYSCTL_HANDLER_ARGS 699{ 700 int error; 701 dev_t ndumpdev; 702 703 ndumpdev = dumpdev; 704 error = sysctl_handle_opaque(oidp, &ndumpdev, sizeof ndumpdev, req); 705 if (!error && ndumpdev != dumpdev) { 706 error = setdumpdev(ndumpdev); 707 } 708 return (error); 709} 710 711SYSCTL_PROC(_kern, KERN_DUMPDEV, dumpdev, CTLTYPE_OPAQUE|CTLFLAG_RW, 712 0, sizeof dumpdev, sysctl_kern_dumpdev, ""); 713/* 714 * hardware related system variables. 715 */ 716int 717hw_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p) 718 int *name; 719 u_int namelen; 720 void *oldp; 721 size_t *oldlenp; 722 void *newp; 723 size_t newlen; 724 struct proc *p; 725{ 726 /* almost all sysctl names at this level are terminal */ 727 if (namelen != 1 && name[0] != HW_DEVCONF) 728 return (ENOTDIR); /* overloaded */ 729 730 switch (name[0]) { 731 case HW_PHYSMEM: 732 return (sysctl_rdint(oldp, oldlenp, newp, ctob(physmem))); 733 case HW_USERMEM: 734 return (sysctl_rdint(oldp, oldlenp, newp, 735 ctob(physmem - cnt.v_wire_count))); 736 case HW_DEVCONF: 737 return (dev_sysctl(name + 1, namelen - 1, oldp, oldlenp, 738 newp, newlen, p)); 739 default: 740 return (EOPNOTSUPP); 741 } 742 /* NOTREACHED */ 743} 744 745/* 746 * Validate parameters and get old / set new parameters 747 * for an integer-valued sysctl function. 748 */ 749int 750sysctl_int(oldp, oldlenp, newp, newlen, valp) 751 void *oldp; 752 size_t *oldlenp; 753 void *newp; 754 size_t newlen; 755 int *valp; 756{ 757 int error = 0; 758 759 if (oldp && *oldlenp < sizeof(int)) 760 return (ENOMEM); 761 if (newp && newlen != sizeof(int)) 762 return (EINVAL); 763 *oldlenp = sizeof(int); 764 if (oldp) 765 error = copyout(valp, oldp, sizeof(int)); 766 if (error == 0 && newp) 767 error = copyin(newp, valp, sizeof(int)); 768 return (error); 769} 770 771/* 772 * As above, but read-only. 773 */ 774int 775sysctl_rdint(oldp, oldlenp, newp, val) 776 void *oldp; 777 size_t *oldlenp; 778 void *newp; 779 int val; 780{ 781 int error = 0; 782 783 if (oldp && *oldlenp < sizeof(int)) 784 return (ENOMEM); 785 if (newp) 786 return (EPERM); 787 *oldlenp = sizeof(int); 788 if (oldp) 789 error = copyout((caddr_t)&val, oldp, sizeof(int)); 790 return (error); 791} 792 793/* 794 * Validate parameters and get old / set new parameters 795 * for a string-valued sysctl function. 796 */ 797int 798sysctl_string(oldp, oldlenp, newp, newlen, str, maxlen) 799 void *oldp; 800 size_t *oldlenp; 801 void *newp; 802 size_t newlen; 803 char *str; 804 int maxlen; 805{ 806 int len, error = 0, rval = 0; 807 808 len = strlen(str) + 1; 809 if (oldp && *oldlenp < len) { 810 len = *oldlenp; 811 rval = ENOMEM; 812 } 813 if (newp && newlen >= maxlen) 814 return (EINVAL); 815 if (oldp) { 816 *oldlenp = len; 817 error = copyout(str, oldp, len); 818 if (error) 819 rval = error; 820 } 821 if ((error == 0 || error == ENOMEM) && newp) { 822 error = copyin(newp, str, newlen); 823 if (error) 824 rval = error; 825 str[newlen] = 0; 826 } 827 return (rval); 828} 829 830/* 831 * As above, but read-only. 832 */ 833int 834sysctl_rdstring(oldp, oldlenp, newp, str) 835 void *oldp; 836 size_t *oldlenp; 837 void *newp; 838 char *str; 839{ 840 int len, error = 0, rval = 0; 841 842 len = strlen(str) + 1; 843 if (oldp && *oldlenp < len) { 844 len = *oldlenp; 845 rval = ENOMEM; 846 } 847 if (newp) 848 return (EPERM); 849 *oldlenp = len; 850 if (oldp) 851 error = copyout(str, oldp, len); 852 if (error) 853 rval = error; 854 return (rval); 855} 856 857/* 858 * Validate parameters and get old / set new parameters 859 * for a structure oriented sysctl function. 860 */ 861int 862sysctl_struct(oldp, oldlenp, newp, newlen, sp, len) 863 void *oldp; 864 size_t *oldlenp; 865 void *newp; 866 size_t newlen; 867 void *sp; 868 int len; 869{ 870 int error = 0; 871 872 if (oldp && *oldlenp < len) 873 return (ENOMEM); 874 if (newp && newlen > len) 875 return (EINVAL); 876 if (oldp) { 877 *oldlenp = len; 878 error = copyout(sp, oldp, len); 879 } 880 if (error == 0 && newp) 881 error = copyin(newp, sp, len); 882 return (error); 883} 884 885/* 886 * Validate parameters and get old parameters 887 * for a structure oriented sysctl function. 888 */ 889int 890sysctl_rdstruct(oldp, oldlenp, newp, sp, len) 891 void *oldp; 892 size_t *oldlenp; 893 void *newp, *sp; 894 int len; 895{ 896 int error = 0; 897 898 if (oldp && *oldlenp < len) 899 return (ENOMEM); 900 if (newp) 901 return (EPERM); 902 *oldlenp = len; 903 if (oldp) 904 error = copyout(sp, oldp, len); 905 return (error); 906} 907 908#ifdef COMPAT_43 909#include <sys/socket.h> 910#define KINFO_PROC (0<<8) 911#define KINFO_RT (1<<8) 912#define KINFO_VNODE (2<<8) 913#define KINFO_FILE (3<<8) 914#define KINFO_METER (4<<8) 915#define KINFO_LOADAVG (5<<8) 916#define KINFO_CLOCKRATE (6<<8) 917 918/* Non-standard BSDI extension - only present on their 4.3 net-2 releases */ 919#define KINFO_BSDI_SYSINFO (101<<8) 920 921/* 922 * XXX this is bloat, but I hope it's better here than on the potentially 923 * limited kernel stack... -Peter 924 */ 925 926struct { 927 int bsdi_machine; /* "i386" on BSD/386 */ 928/* ^^^ this is an offset to the string, relative to the struct start */ 929 char *pad0; 930 long pad1; 931 long pad2; 932 long pad3; 933 u_long pad4; 934 u_long pad5; 935 u_long pad6; 936 937 int bsdi_ostype; /* "BSD/386" on BSD/386 */ 938 int bsdi_osrelease; /* "1.1" on BSD/386 */ 939 long pad7; 940 long pad8; 941 char *pad9; 942 943 long pad10; 944 long pad11; 945 int pad12; 946 long pad13; 947 quad_t pad14; 948 long pad15; 949 950 struct timeval pad16; 951 /* we dont set this, because BSDI's uname used gethostname() instead */ 952 int bsdi_hostname; /* hostname on BSD/386 */ 953 954 /* the actual string data is appended here */ 955 956} bsdi_si; 957/* 958 * this data is appended to the end of the bsdi_si structure during copyout. 959 * The "char *" offsets are relative to the base of the bsdi_si struct. 960 * This contains "FreeBSD\02.0-BUILT-nnnnnn\0i386\0", and these strings 961 * should not exceed the length of the buffer here... (or else!! :-) 962 */ 963char bsdi_strings[80]; /* It had better be less than this! */ 964 965#ifndef _SYS_SYSPROTO_H_ 966struct getkerninfo_args { 967 int op; 968 char *where; 969 int *size; 970 int arg; 971}; 972#endif 973 974int 975ogetkerninfo(p, uap, retval) 976 struct proc *p; 977 register struct getkerninfo_args *uap; 978 int *retval; 979{ 980 int error, name[6]; 981 u_int size; 982 983 switch (uap->op & 0xff00) { 984 985 case KINFO_RT: 986 name[0] = CTL_NET; 987 name[1] = PF_ROUTE; 988 name[2] = 0; 989 name[3] = (uap->op & 0xff0000) >> 16; 990 name[4] = uap->op & 0xff; 991 name[5] = uap->arg; 992 error = userland_sysctl(p, name, 6, uap->where, uap->size, 993 0, 0, 0, 0); 994 break; 995 996 case KINFO_VNODE: 997 name[0] = CTL_KERN; 998 name[1] = KERN_VNODE; 999 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1000 0, 0, 0, 0); 1001 break; 1002 1003 case KINFO_PROC: 1004 name[0] = CTL_KERN; 1005 name[1] = KERN_PROC; 1006 name[2] = uap->op & 0xff; 1007 name[3] = uap->arg; 1008 error = userland_sysctl(p, name, 4, uap->where, uap->size, 1009 0, 0, 0, 0); 1010 break; 1011 1012 case KINFO_FILE: 1013 name[0] = CTL_KERN; 1014 name[1] = KERN_FILE; 1015 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1016 0, 0, 0, 0); 1017 break; 1018 1019 case KINFO_METER: 1020 name[0] = CTL_VM; 1021 name[1] = VM_METER; 1022 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1023 0, 0, 0, 0); 1024 break; 1025 1026 case KINFO_LOADAVG: 1027 name[0] = CTL_VM; 1028 name[1] = VM_LOADAVG; 1029 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1030 0, 0, 0, 0); 1031 break; 1032 1033 case KINFO_CLOCKRATE: 1034 name[0] = CTL_KERN; 1035 name[1] = KERN_CLOCKRATE; 1036 error = userland_sysctl(p, name, 2, uap->where, uap->size, 1037 0, 0, 0, 0); 1038 break; 1039 1040 case KINFO_BSDI_SYSINFO: { 1041 /* 1042 * this is pretty crude, but it's just enough for uname() 1043 * from BSDI's 1.x libc to work. 1044 * 1045 * In particular, it doesn't return the same results when 1046 * the supplied buffer is too small. BSDI's version apparently 1047 * will return the amount copied, and set the *size to how 1048 * much was needed. The emulation framework here isn't capable 1049 * of that, so we just set both to the amount copied. 1050 * BSDI's 2.x product apparently fails with ENOMEM in this 1051 * scenario. 1052 */ 1053 1054 u_int needed; 1055 u_int left; 1056 char *s; 1057 1058 bzero((char *)&bsdi_si, sizeof(bsdi_si)); 1059 bzero(bsdi_strings, sizeof(bsdi_strings)); 1060 1061 s = bsdi_strings; 1062 1063 bsdi_si.bsdi_ostype = (s - bsdi_strings) + sizeof(bsdi_si); 1064 strcpy(s, ostype); 1065 s += strlen(s) + 1; 1066 1067 bsdi_si.bsdi_osrelease = (s - bsdi_strings) + sizeof(bsdi_si); 1068 strcpy(s, osrelease); 1069 s += strlen(s) + 1; 1070 1071 bsdi_si.bsdi_machine = (s - bsdi_strings) + sizeof(bsdi_si); 1072 strcpy(s, machine); 1073 s += strlen(s) + 1; 1074 1075 needed = sizeof(bsdi_si) + (s - bsdi_strings); 1076 1077 if (uap->where == NULL) { 1078 /* process is asking how much buffer to supply.. */ 1079 size = needed; 1080 error = 0; 1081 break; 1082 } 1083 1084 1085 /* if too much buffer supplied, trim it down */ 1086 if (size > needed) 1087 size = needed; 1088 1089 /* how much of the buffer is remaining */ 1090 left = size; 1091 1092 if ((error = copyout((char *)&bsdi_si, uap->where, left)) != 0) 1093 break; 1094 1095 /* is there any point in continuing? */ 1096 if (left > sizeof(bsdi_si)) { 1097 left -= sizeof(bsdi_si); 1098 error = copyout(&bsdi_strings, 1099 uap->where + sizeof(bsdi_si), left); 1100 } 1101 break; 1102 } 1103 1104 default: 1105 return (EOPNOTSUPP); 1106 } 1107 if (error) 1108 return (error); 1109 *retval = size; 1110 if (uap->size) 1111 error = copyout((caddr_t)&size, (caddr_t)uap->size, 1112 sizeof(size)); 1113 return (error); 1114} 1115#endif /* COMPAT_43 */ 1116