1 /* $NetBSD: sem.c,v 1.33 2009/04/11 12:41:10 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * All advertising materials mentioning features or use of this software 12 * must display the following acknowledgement: 13 * This product includes software developed by the University of 14 * California, Lawrence Berkeley Laboratories. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 3. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: @(#)sem.c 8.1 (Berkeley) 6/6/93 41 */ 42 43 #if HAVE_NBTOOL_CONFIG_H 44 #include "nbtool_config.h" 45 #endif 46 47 #include <sys/param.h> 48 #include <ctype.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <util.h> 53 #include "defs.h" 54 #include "sem.h" 55 56 /* 57 * config semantics. 58 */ 59 60 #define NAMESIZE 100 /* local name buffers */ 61 62 const char *s_ifnet; /* magic attribute */ 63 const char *s_qmark; 64 const char *s_none; 65 66 static struct hashtab *cfhashtab; /* for config lookup */ 67 struct hashtab *devitab; /* etc */ 68 69 static struct attr errattr; 70 static struct devbase errdev; 71 static struct deva errdeva; 72 73 static int has_errobj(struct nvlist *, void *); 74 static struct nvlist *addtoattr(struct nvlist *, struct devbase *); 75 static int resolve(struct nvlist **, const char *, const char *, 76 struct nvlist *, int); 77 static struct pspec *getpspec(struct attr *, struct devbase *, int); 78 static struct devi *newdevi(const char *, int, struct devbase *d); 79 static struct devi *getdevi(const char *); 80 static void remove_devi(struct devi *); 81 static const char *concat(const char *, int); 82 static char *extend(char *, const char *); 83 static int split(const char *, size_t, char *, size_t, int *); 84 static void selectbase(struct devbase *, struct deva *); 85 static const char **fixloc(const char *, struct attr *, struct nvlist *); 86 static const char *makedevstr(devmajor_t, devminor_t); 87 static const char *major2name(devmajor_t); 88 static devmajor_t dev2major(struct devbase *); 89 90 extern const char *yyfile; 91 extern int vflag; 92 93 void 94 initsem(void) 95 { 96 97 attrtab = ht_new(); 98 errattr.a_name = "<internal>"; 99 100 TAILQ_INIT(&allbases); 101 102 TAILQ_INIT(&alldevas); 103 104 TAILQ_INIT(&allpspecs); 105 106 cfhashtab = ht_new(); 107 TAILQ_INIT(&allcf); 108 109 TAILQ_INIT(&alldevi); 110 errdev.d_name = "<internal>"; 111 112 TAILQ_INIT(&allpseudo); 113 114 TAILQ_INIT(&alldevms); 115 116 s_ifnet = intern("ifnet"); 117 s_qmark = intern("?"); 118 s_none = intern("none"); 119 } 120 121 /* Name of include file just ended (set in scan.l) */ 122 extern const char *lastfile; 123 124 void 125 enddefs(void) 126 { 127 struct devbase *dev; 128 129 TAILQ_FOREACH(dev, &allbases, d_next) { 130 if (!dev->d_isdef) { 131 (void)fprintf(stderr, 132 "%s: device `%s' used but not defined\n", 133 lastfile, dev->d_name); 134 errors++; 135 continue; 136 } 137 } 138 if (errors) { 139 (void)fprintf(stderr, "*** Stop.\n"); 140 exit(1); 141 } 142 } 143 144 void 145 setdefmaxusers(int min, int def, int max) 146 { 147 148 if (min < 1 || min > def || def > max) 149 cfgerror("maxusers must have 1 <= min (%d) <= default (%d) " 150 "<= max (%d)", min, def, max); 151 else { 152 minmaxusers = min; 153 defmaxusers = def; 154 maxmaxusers = max; 155 } 156 } 157 158 void 159 setmaxusers(int n) 160 { 161 162 if (maxusers == n) { 163 cfgerror("duplicate maxusers parameter"); 164 return; 165 } 166 if (vflag && maxusers != 0) 167 cfgwarn("warning: maxusers already defined"); 168 maxusers = n; 169 if (n < minmaxusers) { 170 cfgerror("warning: minimum of %d maxusers assumed", 171 minmaxusers); 172 errors--; /* take it away */ 173 maxusers = minmaxusers; 174 } else if (n > maxmaxusers) { 175 cfgerror("warning: maxusers (%d) > %d", n, maxmaxusers); 176 errors--; 177 } 178 } 179 180 void 181 setident(const char *i) 182 { 183 184 ident = intern(i); 185 } 186 187 /* 188 * Define an attribute, optionally with an interface (a locator list) 189 * and a set of attribute-dependencies. 190 * 191 * Attribute dependencies MAY NOT be interface attributes. 192 * 193 * Since an empty locator list is logically different from "no interface", 194 * all locator lists include a dummy head node, which we discard here. 195 */ 196 int 197 defattr(const char *name, struct nvlist *locs, struct nvlist *deps, 198 int devclass) 199 { 200 struct attr *a, *dep; 201 struct nvlist *nv; 202 int len; 203 204 if (locs != NULL && devclass) 205 panic("defattr(%s): locators and devclass", name); 206 207 if (deps != NULL && devclass) 208 panic("defattr(%s): dependencies and devclass", name); 209 210 /* 211 * If this attribute depends on any others, make sure none of 212 * the dependencies are interface attributes. 213 */ 214 for (nv = deps; nv != NULL; nv = nv->nv_next) { 215 dep = nv->nv_ptr; 216 if (dep->a_iattr) { 217 cfgerror("`%s' dependency `%s' is an interface " 218 "attribute", name, dep->a_name); 219 return (1); 220 } 221 } 222 223 a = ecalloc(1, sizeof *a); 224 if (ht_insert(attrtab, name, a)) { 225 free(a); 226 cfgerror("attribute `%s' already defined", name); 227 nvfreel(locs); 228 return (1); 229 } 230 231 a->a_name = name; 232 if (locs != NULL) { 233 a->a_iattr = 1; 234 a->a_locs = locs->nv_next; 235 nvfree(locs); 236 } else { 237 a->a_iattr = 0; 238 a->a_locs = NULL; 239 } 240 if (devclass) { 241 char classenum[256], *cp; 242 int errored = 0; 243 244 (void)snprintf(classenum, sizeof(classenum), "DV_%s", name); 245 for (cp = classenum + 3; *cp; cp++) { 246 if (!errored && 247 (!isalnum((unsigned char)*cp) || 248 (isalpha((unsigned char)*cp) && !islower((unsigned char)*cp)))) { 249 cfgerror("device class names must be " 250 "lower-case alphanumeric characters"); 251 errored = 1; 252 } 253 *cp = toupper((unsigned char)*cp); 254 } 255 a->a_devclass = intern(classenum); 256 } else 257 a->a_devclass = NULL; 258 len = 0; 259 for (nv = a->a_locs; nv != NULL; nv = nv->nv_next) 260 len++; 261 a->a_loclen = len; 262 a->a_devs = NULL; 263 a->a_refs = NULL; 264 a->a_deps = deps; 265 a->a_expanding = 0; 266 267 /* Expand the attribute to check for cycles in the graph. */ 268 expandattr(a, NULL); 269 270 return (0); 271 } 272 273 /* 274 * Return true if the given `error object' is embedded in the given 275 * pointer list. 276 */ 277 static int 278 has_errobj(struct nvlist *nv, void *obj) 279 { 280 281 for (; nv != NULL; nv = nv->nv_next) 282 if (nv->nv_ptr == obj) 283 return (1); 284 return (0); 285 } 286 287 /* 288 * Return true if the given attribute is embedded in the given 289 * pointer list. 290 */ 291 int 292 has_attr(struct nvlist *nv, const char *attr) 293 { 294 struct attr *a; 295 296 if ((a = getattr(attr)) == NULL) 297 return (0); 298 299 for (; nv != NULL; nv = nv->nv_next) 300 if (nv->nv_ptr == a) 301 return (1); 302 return (0); 303 } 304 305 /* 306 * Add a device base to a list in an attribute (actually, to any list). 307 * Note that this does not check for duplicates, and does reverse the 308 * list order, but no one cares anyway. 309 */ 310 static struct nvlist * 311 addtoattr(struct nvlist *l, struct devbase *dev) 312 { 313 struct nvlist *n; 314 315 n = newnv(NULL, NULL, dev, 0, l); 316 return (n); 317 } 318 319 /* 320 * Define a device. This may (or may not) also define an interface 321 * attribute and/or refer to existing attributes. 322 */ 323 void 324 defdev(struct devbase *dev, struct nvlist *loclist, struct nvlist *attrs, 325 int ispseudo) 326 { 327 struct nvlist *nv; 328 struct attr *a; 329 330 if (dev == &errdev) 331 goto bad; 332 if (dev->d_isdef) { 333 cfgerror("redefinition of `%s'", dev->d_name); 334 goto bad; 335 } 336 337 dev->d_isdef = 1; 338 if (has_errobj(attrs, &errattr)) 339 goto bad; 340 341 /* 342 * Handle implicit attribute definition from locator list. Do 343 * this before scanning the `at' list so that we can have, e.g.: 344 * device foo at other, foo { slot = -1 } 345 * (where you can plug in a foo-bus extender to a foo-bus). 346 */ 347 if (loclist != NULL) { 348 nv = loclist; 349 loclist = NULL; /* defattr disposes of them for us */ 350 if (defattr(dev->d_name, nv, NULL, 0)) 351 goto bad; 352 attrs = newnv(dev->d_name, NULL, getattr(dev->d_name), 0, 353 attrs); 354 355 } 356 357 /* 358 * Pseudo-devices can have children. Consider them as 359 * attaching at root. 360 */ 361 if (ispseudo) { 362 for (nv = attrs; nv != NULL; nv = nv->nv_next) 363 if (((struct attr *)(nv->nv_ptr))->a_iattr) 364 break; 365 if (nv != NULL) { 366 if (ispseudo < 2) { 367 if (version >= 20080610) 368 cfgerror("interface attribute on " 369 "non-device pseudo `%s'", dev->d_name); 370 else { 371 ispseudo = 2; 372 } 373 } 374 ht_insert(devroottab, dev->d_name, dev); 375 } 376 } 377 378 /* Committed! Set up fields. */ 379 dev->d_ispseudo = ispseudo; 380 dev->d_attrs = attrs; 381 dev->d_classattr = NULL; /* for now */ 382 383 /* 384 * For each interface attribute this device refers to, add this 385 * device to its reference list. This makes, e.g., finding all 386 * "scsi"s easier. 387 * 388 * While looking through the attributes, set up the device 389 * class if any are devclass attributes (and error out if the 390 * device has two classes). 391 */ 392 for (nv = attrs; nv != NULL; nv = nv->nv_next) { 393 a = nv->nv_ptr; 394 if (a->a_iattr) 395 a->a_refs = addtoattr(a->a_refs, dev); 396 if (a->a_devclass != NULL) { 397 if (dev->d_classattr != NULL) { 398 cfgerror("device `%s' has multiple classes " 399 "(`%s' and `%s')", 400 dev->d_name, dev->d_classattr->a_name, 401 a->a_name); 402 } 403 dev->d_classattr = a; 404 } 405 } 406 return; 407 bad: 408 nvfreel(loclist); 409 nvfreel(attrs); 410 } 411 412 /* 413 * Look up a devbase. Also makes sure it is a reasonable name, 414 * i.e., does not end in a digit or contain special characters. 415 */ 416 struct devbase * 417 getdevbase(const char *name) 418 { 419 const u_char *p; 420 struct devbase *dev; 421 422 p = (const u_char *)name; 423 if (!isalpha(*p)) 424 goto badname; 425 while (*++p) { 426 if (!isalnum(*p) && *p != '_') 427 goto badname; 428 } 429 if (isdigit(*--p)) { 430 badname: 431 cfgerror("bad device base name `%s'", name); 432 return (&errdev); 433 } 434 dev = ht_lookup(devbasetab, name); 435 if (dev == NULL) { 436 dev = ecalloc(1, sizeof *dev); 437 dev->d_name = name; 438 dev->d_isdef = 0; 439 dev->d_major = NODEVMAJOR; 440 dev->d_attrs = NULL; 441 dev->d_ihead = NULL; 442 dev->d_ipp = &dev->d_ihead; 443 dev->d_ahead = NULL; 444 dev->d_app = &dev->d_ahead; 445 dev->d_umax = 0; 446 TAILQ_INSERT_TAIL(&allbases, dev, d_next); 447 if (ht_insert(devbasetab, name, dev)) 448 panic("getdevbase(%s)", name); 449 } 450 return (dev); 451 } 452 453 /* 454 * Define some of a device's allowable parent attachments. 455 * There may be a list of (plain) attributes. 456 */ 457 void 458 defdevattach(struct deva *deva, struct devbase *dev, struct nvlist *atlist, 459 struct nvlist *attrs) 460 { 461 struct nvlist *nv; 462 struct attr *a; 463 struct deva *da; 464 465 if (dev == &errdev) 466 goto bad; 467 if (deva == NULL) 468 deva = getdevattach(dev->d_name); 469 if (deva == &errdeva) 470 goto bad; 471 if (!dev->d_isdef) { 472 cfgerror("attaching undefined device `%s'", dev->d_name); 473 goto bad; 474 } 475 if (deva->d_isdef) { 476 cfgerror("redefinition of `%s'", deva->d_name); 477 goto bad; 478 } 479 if (dev->d_ispseudo) { 480 cfgerror("pseudo-devices can't attach"); 481 goto bad; 482 } 483 484 deva->d_isdef = 1; 485 if (has_errobj(attrs, &errattr)) 486 goto bad; 487 for (nv = attrs; nv != NULL; nv = nv->nv_next) { 488 a = nv->nv_ptr; 489 if (a == &errattr) 490 continue; /* already complained */ 491 if (a->a_iattr || a->a_devclass != NULL) 492 cfgerror("`%s' is not a plain attribute", a->a_name); 493 } 494 495 /* Committed! Set up fields. */ 496 deva->d_attrs = attrs; 497 deva->d_atlist = atlist; 498 deva->d_devbase = dev; 499 500 /* 501 * Turn the `at' list into interface attributes (map each 502 * nv_name to an attribute, or to NULL for root), and add 503 * this device to those attributes, so that children can 504 * be listed at this particular device if they are supported 505 * by that attribute. 506 */ 507 for (nv = atlist; nv != NULL; nv = nv->nv_next) { 508 if (nv->nv_name == NULL) 509 nv->nv_ptr = a = NULL; /* at root */ 510 else 511 nv->nv_ptr = a = getattr(nv->nv_name); 512 if (a == &errattr) 513 continue; /* already complained */ 514 515 /* 516 * Make sure that an attachment spec doesn't 517 * already say how to attach to this attribute. 518 */ 519 for (da = dev->d_ahead; da != NULL; da = da->d_bsame) 520 if (onlist(da->d_atlist, a)) 521 cfgerror("attach at `%s' already done by `%s'", 522 a ? a->a_name : "root", da->d_name); 523 524 if (a == NULL) { 525 ht_insert(devroottab, dev->d_name, dev); 526 continue; /* at root; don't add */ 527 } 528 if (!a->a_iattr) 529 cfgerror("%s cannot be at plain attribute `%s'", 530 dev->d_name, a->a_name); 531 else 532 a->a_devs = addtoattr(a->a_devs, dev); 533 } 534 535 /* attach to parent */ 536 *dev->d_app = deva; 537 dev->d_app = &deva->d_bsame; 538 return; 539 bad: 540 nvfreel(atlist); 541 nvfreel(attrs); 542 } 543 544 /* 545 * Look up a device attachment. Also makes sure it is a reasonable 546 * name, i.e., does not contain digits or special characters. 547 */ 548 struct deva * 549 getdevattach(const char *name) 550 { 551 const u_char *p; 552 struct deva *deva; 553 554 p = (const u_char *)name; 555 if (!isalpha(*p)) 556 goto badname; 557 while (*++p) { 558 if (!isalnum(*p) && *p != '_') 559 goto badname; 560 } 561 if (isdigit(*--p)) { 562 badname: 563 cfgerror("bad device attachment name `%s'", name); 564 return (&errdeva); 565 } 566 deva = ht_lookup(devatab, name); 567 if (deva == NULL) { 568 deva = ecalloc(1, sizeof *deva); 569 deva->d_name = name; 570 deva->d_bsame = NULL; 571 deva->d_isdef = 0; 572 deva->d_devbase = NULL; 573 deva->d_atlist = NULL; 574 deva->d_attrs = NULL; 575 deva->d_ihead = NULL; 576 deva->d_ipp = &deva->d_ihead; 577 TAILQ_INSERT_TAIL(&alldevas, deva, d_next); 578 if (ht_insert(devatab, name, deva)) 579 panic("getdeva(%s)", name); 580 } 581 return (deva); 582 } 583 584 /* 585 * Look up an attribute. 586 */ 587 struct attr * 588 getattr(const char *name) 589 { 590 struct attr *a; 591 592 if ((a = ht_lookup(attrtab, name)) == NULL) { 593 cfgerror("undefined attribute `%s'", name); 594 a = &errattr; 595 } 596 return (a); 597 } 598 599 /* 600 * Recursively expand an attribute and its dependencies, checking for 601 * cycles, and invoking a callback for each attribute found. 602 */ 603 void 604 expandattr(struct attr *a, void (*callback)(struct attr *)) 605 { 606 struct nvlist *nv; 607 struct attr *dep; 608 609 if (a->a_expanding) { 610 cfgerror("circular dependency on attribute `%s'", a->a_name); 611 return; 612 } 613 614 a->a_expanding = 1; 615 616 /* First expand all of this attribute's dependencies. */ 617 for (nv = a->a_deps; nv != NULL; nv = nv->nv_next) { 618 dep = nv->nv_ptr; 619 expandattr(dep, callback); 620 } 621 622 /* ...and now invoke the callback for ourself. */ 623 if (callback != NULL) 624 (*callback)(a); 625 626 a->a_expanding = 0; 627 } 628 629 /* 630 * Set the major device number for a device, so that it can be used 631 * as a root/dumps "on" device in a configuration. 632 */ 633 void 634 setmajor(struct devbase *d, devmajor_t n) 635 { 636 637 if (d != &errdev && d->d_major != NODEVMAJOR) 638 cfgerror("device `%s' is already major %d", 639 d->d_name, d->d_major); 640 else 641 d->d_major = n; 642 } 643 644 const char * 645 major2name(devmajor_t maj) 646 { 647 struct devbase *dev; 648 struct devm *dm; 649 650 if (!do_devsw) { 651 TAILQ_FOREACH(dev, &allbases, d_next) { 652 if (dev->d_major == maj) 653 return (dev->d_name); 654 } 655 } else { 656 TAILQ_FOREACH(dm, &alldevms, dm_next) { 657 if (dm->dm_bmajor == maj) 658 return (dm->dm_name); 659 } 660 } 661 return (NULL); 662 } 663 664 devmajor_t 665 dev2major(struct devbase *dev) 666 { 667 struct devm *dm; 668 669 if (!do_devsw) 670 return (dev->d_major); 671 672 TAILQ_FOREACH(dm, &alldevms, dm_next) { 673 if (strcmp(dm->dm_name, dev->d_name) == 0) 674 return (dm->dm_bmajor); 675 } 676 return (NODEVMAJOR); 677 } 678 679 /* 680 * Make a string description of the device at maj/min. 681 */ 682 static const char * 683 makedevstr(devmajor_t maj, devminor_t min) 684 { 685 const char *devicename; 686 char buf[32]; 687 688 devicename = major2name(maj); 689 if (devicename == NULL) 690 (void)snprintf(buf, sizeof(buf), "<%d/%d>", maj, min); 691 else 692 (void)snprintf(buf, sizeof(buf), "%s%d%c", devicename, 693 min / maxpartitions, (min % maxpartitions) + 'a'); 694 695 return (intern(buf)); 696 } 697 698 /* 699 * Map things like "ra0b" => makedev(major("ra"), 0*maxpartitions + 'b'-'a'). 700 * Handle the case where the device number is given but there is no 701 * corresponding name, and map NULL to the default. 702 */ 703 static int 704 resolve(struct nvlist **nvp, const char *name, const char *what, 705 struct nvlist *dflt, int part) 706 { 707 struct nvlist *nv; 708 struct devbase *dev; 709 const char *cp; 710 devmajor_t maj; 711 devminor_t min; 712 int i, l; 713 int unit; 714 char buf[NAMESIZE]; 715 716 if ((part -= 'a') >= maxpartitions || part < 0) 717 panic("resolve"); 718 if ((nv = *nvp) == NULL) { 719 dev_t d = NODEV; 720 /* 721 * Apply default. Easiest to do this by number. 722 * Make sure to retain NODEVness, if this is dflt's disposition. 723 */ 724 if ((dev_t)dflt->nv_num != NODEV) { 725 maj = major(dflt->nv_num); 726 min = ((minor(dflt->nv_num) / maxpartitions) * 727 maxpartitions) + part; 728 d = makedev(maj, min); 729 cp = makedevstr(maj, min); 730 } else 731 cp = NULL; 732 *nvp = nv = newnv(NULL, cp, NULL, d, NULL); 733 } 734 if ((dev_t)nv->nv_num != NODEV) { 735 /* 736 * By the numbers. Find the appropriate major number 737 * to make a name. 738 */ 739 maj = major(nv->nv_num); 740 min = minor(nv->nv_num); 741 nv->nv_str = makedevstr(maj, min); 742 return (0); 743 } 744 745 if (nv->nv_str == NULL || nv->nv_str == s_qmark) 746 /* 747 * Wildcarded or unspecified; leave it as NODEV. 748 */ 749 return (0); 750 751 /* 752 * The normal case: things like "ra2b". Check for partition 753 * suffix, remove it if there, and split into name ("ra") and 754 * unit (2). 755 */ 756 l = i = strlen(nv->nv_str); 757 cp = &nv->nv_str[l]; 758 if (l > 1 && *--cp >= 'a' && *cp < 'a' + maxpartitions && 759 isdigit((unsigned char)cp[-1])) { 760 l--; 761 part = *cp - 'a'; 762 } 763 cp = nv->nv_str; 764 if (split(cp, l, buf, sizeof buf, &unit)) { 765 cfgerror("%s: invalid %s device name `%s'", name, what, cp); 766 return (1); 767 } 768 dev = ht_lookup(devbasetab, intern(buf)); 769 if (dev == NULL) { 770 cfgerror("%s: device `%s' does not exist", name, buf); 771 return (1); 772 } 773 774 /* 775 * Check for the magic network interface attribute, and 776 * don't bother making a device number. 777 */ 778 if (has_attr(dev->d_attrs, s_ifnet)) { 779 nv->nv_num = NODEV; 780 nv->nv_ifunit = unit; /* XXX XXX XXX */ 781 } else { 782 maj = dev2major(dev); 783 if (maj == NODEVMAJOR) { 784 cfgerror("%s: can't make %s device from `%s'", 785 name, what, nv->nv_str); 786 return (1); 787 } 788 nv->nv_num = makedev(maj, unit * maxpartitions + part); 789 } 790 791 nv->nv_name = dev->d_name; 792 return (0); 793 } 794 795 /* 796 * Add a completed configuration to the list. 797 */ 798 void 799 addconf(struct config *cf0) 800 { 801 struct config *cf; 802 const char *name; 803 804 name = cf0->cf_name; 805 cf = ecalloc(1, sizeof *cf); 806 if (ht_insert(cfhashtab, name, cf)) { 807 cfgerror("configuration `%s' already defined", name); 808 free(cf); 809 goto bad; 810 } 811 *cf = *cf0; 812 813 /* 814 * Resolve the root device. 815 */ 816 if (cf->cf_root == NULL) { 817 cfgerror("%s: no root device specified", name); 818 goto bad; 819 } 820 if (cf->cf_root && cf->cf_root->nv_str != s_qmark) { 821 struct nvlist *nv; 822 nv = cf->cf_root; 823 if (resolve(&cf->cf_root, name, "root", nv, 'a')) 824 goto bad; 825 } 826 827 /* 828 * Resolve the dump device. 829 */ 830 if (cf->cf_dump == NULL || cf->cf_dump->nv_str == s_qmark) { 831 /* 832 * Wildcarded dump device is equivalent to unspecified. 833 */ 834 cf->cf_dump = NULL; 835 } else if (cf->cf_dump->nv_str == s_none) { 836 /* 837 * Operator has requested that no dump device should be 838 * configured; do nothing. 839 */ 840 } else { 841 if (resolve(&cf->cf_dump, name, "dumps", cf->cf_dump, 'b')) 842 goto bad; 843 } 844 845 /* Wildcarded fstype is `unspecified'. */ 846 if (cf->cf_fstype == s_qmark) 847 cf->cf_fstype = NULL; 848 849 TAILQ_INSERT_TAIL(&allcf, cf, cf_next); 850 return; 851 bad: 852 nvfreel(cf0->cf_root); 853 nvfreel(cf0->cf_dump); 854 } 855 856 void 857 setconf(struct nvlist **npp, const char *what, struct nvlist *v) 858 { 859 860 if (*npp != NULL) { 861 cfgerror("duplicate %s specification", what); 862 nvfreel(v); 863 } else 864 *npp = v; 865 } 866 867 void 868 delconf(const char *name) 869 { 870 struct config *cf; 871 872 if (ht_lookup(cfhashtab, name) == NULL) { 873 cfgerror("configuration `%s' undefined", name); 874 return; 875 } 876 (void)ht_remove(cfhashtab, name); 877 878 TAILQ_FOREACH(cf, &allcf, cf_next) 879 if (!strcmp(cf->cf_name, name)) 880 break; 881 if (cf == NULL) 882 panic("lost configuration `%s'", name); 883 884 TAILQ_REMOVE(&allcf, cf, cf_next); 885 } 886 887 void 888 setfstype(const char **fstp, const char *v) 889 { 890 891 if (*fstp != NULL) { 892 cfgerror("multiple fstype specifications"); 893 return; 894 } 895 896 if (v != s_qmark && OPT_FSOPT(v)) { 897 cfgerror("\"%s\" is not a configured file system", v); 898 return; 899 } 900 901 *fstp = v; 902 } 903 904 static struct devi * 905 newdevi(const char *name, int unit, struct devbase *d) 906 { 907 struct devi *i; 908 909 i = ecalloc(1, sizeof *i); 910 i->i_name = name; 911 i->i_unit = unit; 912 i->i_base = d; 913 i->i_bsame = NULL; 914 i->i_asame = NULL; 915 i->i_alias = NULL; 916 i->i_at = NULL; 917 i->i_pspec = NULL; 918 i->i_atdeva = NULL; 919 i->i_locs = NULL; 920 i->i_cfflags = 0; 921 i->i_lineno = currentline(); 922 i->i_srcfile = yyfile; 923 i->i_active = DEVI_ORPHAN; /* Proper analysis comes later */ 924 i->i_level = devilevel; 925 if (unit >= d->d_umax) 926 d->d_umax = unit + 1; 927 return (i); 928 } 929 930 /* 931 * Add the named device as attaching to the named attribute (or perhaps 932 * another device instead) plus unit number. 933 */ 934 void 935 adddev(const char *name, const char *at, struct nvlist *loclist, int flags) 936 { 937 struct devi *i; /* the new instance */ 938 struct pspec *p; /* and its pspec */ 939 struct attr *attr; /* attribute that allows attach */ 940 struct devbase *ib; /* i->i_base */ 941 struct devbase *ab; /* not NULL => at another dev */ 942 struct nvlist *nv; 943 struct deva *iba; /* devbase attachment used */ 944 const char *cp; 945 int atunit; 946 char atbuf[NAMESIZE]; 947 int hit; 948 949 ab = NULL; 950 iba = NULL; 951 if (at == NULL) { 952 /* "at root" */ 953 p = NULL; 954 if ((i = getdevi(name)) == NULL) 955 goto bad; 956 /* 957 * Must warn about i_unit > 0 later, after taking care of 958 * the STAR cases (we could do non-star's here but why 959 * bother?). Make sure this device can be at root. 960 */ 961 ib = i->i_base; 962 hit = 0; 963 for (iba = ib->d_ahead; iba != NULL; iba = iba->d_bsame) 964 if (onlist(iba->d_atlist, NULL)) { 965 hit = 1; 966 break; 967 } 968 if (!hit) { 969 cfgerror("`%s' cannot attach to the root", ib->d_name); 970 i->i_active = DEVI_BROKEN; 971 goto bad; 972 } 973 attr = &errattr; /* a convenient "empty" attr */ 974 } else { 975 if (split(at, strlen(at), atbuf, sizeof atbuf, &atunit)) { 976 cfgerror("invalid attachment name `%s'", at); 977 /* (void)getdevi(name); -- ??? */ 978 goto bad; 979 } 980 if ((i = getdevi(name)) == NULL) 981 goto bad; 982 ib = i->i_base; 983 984 /* 985 * Devices can attach to two types of things: Attributes, 986 * and other devices (which have the appropriate attributes 987 * to allow attachment). 988 * 989 * (1) If we're attached to an attribute, then we don't need 990 * look at the parent base device to see what attributes 991 * it has, and make sure that we can attach to them. 992 * 993 * (2) If we're attached to a real device (i.e. named in 994 * the config file), we want to remember that so that 995 * at cross-check time, if the device we're attached to 996 * is missing but other devices which also provide the 997 * attribute are present, we don't get a false "OK." 998 * 999 * (3) If the thing we're attached to is an attribute 1000 * but is actually named in the config file, we still 1001 * have to remember its devbase. 1002 */ 1003 cp = intern(atbuf); 1004 1005 /* Figure out parent's devbase, to satisfy case (3). */ 1006 ab = ht_lookup(devbasetab, cp); 1007 1008 /* Find out if it's an attribute. */ 1009 attr = ht_lookup(attrtab, cp); 1010 1011 /* Make sure we're _really_ attached to the attr. Case (1). */ 1012 if (attr != NULL && onlist(attr->a_devs, ib)) 1013 goto findattachment; 1014 1015 /* 1016 * Else a real device, and not just an attribute. Case (2). 1017 * 1018 * Have to work a bit harder to see whether we have 1019 * something like "tg0 at esp0" (where esp is merely 1020 * not an attribute) or "tg0 at nonesuch0" (where 1021 * nonesuch is not even a device). 1022 */ 1023 if (ab == NULL) { 1024 cfgerror("%s at %s: `%s' unknown", 1025 name, at, atbuf); 1026 i->i_active = DEVI_BROKEN; 1027 goto bad; 1028 } 1029 1030 /* 1031 * See if the named parent carries an attribute 1032 * that allows it to supervise device ib. 1033 */ 1034 for (nv = ab->d_attrs; nv != NULL; nv = nv->nv_next) { 1035 attr = nv->nv_ptr; 1036 if (onlist(attr->a_devs, ib)) 1037 goto findattachment; 1038 } 1039 cfgerror("`%s' cannot attach to `%s'", ib->d_name, atbuf); 1040 i->i_active = DEVI_BROKEN; 1041 goto bad; 1042 1043 findattachment: 1044 /* 1045 * Find the parent spec. If a matching one has not yet been 1046 * created, create one. 1047 */ 1048 p = getpspec(attr, ab, atunit); 1049 p->p_devs = newnv(NULL, NULL, i, 0, p->p_devs); 1050 1051 /* find out which attachment it uses */ 1052 hit = 0; 1053 for (iba = ib->d_ahead; iba != NULL; iba = iba->d_bsame) 1054 if (onlist(iba->d_atlist, attr)) { 1055 hit = 1; 1056 break; 1057 } 1058 if (!hit) 1059 panic("adddev: can't figure out attachment"); 1060 } 1061 if ((i->i_locs = fixloc(name, attr, loclist)) == NULL) { 1062 i->i_active = DEVI_BROKEN; 1063 goto bad; 1064 } 1065 i->i_at = at; 1066 i->i_pspec = p; 1067 i->i_atdeva = iba; 1068 i->i_cfflags = flags; 1069 1070 *iba->d_ipp = i; 1071 iba->d_ipp = &i->i_asame; 1072 1073 /* all done, fall into ... */ 1074 bad: 1075 nvfreel(loclist); 1076 return; 1077 } 1078 1079 void 1080 deldevi(const char *name, const char *at) 1081 { 1082 struct devi *firsti, *i; 1083 struct devbase *d; 1084 int unit; 1085 char base[NAMESIZE]; 1086 1087 if (split(name, strlen(name), base, sizeof base, &unit)) { 1088 cfgerror("invalid device name `%s'", name); 1089 return; 1090 } 1091 d = ht_lookup(devbasetab, intern(base)); 1092 if (d == NULL) { 1093 cfgerror("%s: unknown device `%s'", name, base); 1094 return; 1095 } 1096 if (d->d_ispseudo) { 1097 cfgerror("%s: %s is a pseudo-device", name, base); 1098 return; 1099 } 1100 if ((firsti = ht_lookup(devitab, name)) == NULL) { 1101 cfgerror("`%s' not defined", name); 1102 return; 1103 } 1104 if (at == NULL && firsti->i_at == NULL) { 1105 /* 'at root' */ 1106 remove_devi(firsti); 1107 return; 1108 } else if (at != NULL) 1109 for (i = firsti; i != NULL; i = i->i_alias) 1110 if (i->i_active != DEVI_BROKEN && 1111 strcmp(at, i->i_at) == 0) { 1112 remove_devi(i); 1113 return; 1114 } 1115 cfgerror("`%s' at `%s' not found", name, at ? at : "root"); 1116 } 1117 1118 static void 1119 remove_devi(struct devi *i) 1120 { 1121 struct devbase *d = i->i_base; 1122 struct devi *f, *j, **ppi; 1123 struct deva *iba; 1124 1125 f = ht_lookup(devitab, i->i_name); 1126 if (f == NULL) 1127 panic("remove_devi(): instance %s disappeared from devitab", 1128 i->i_name); 1129 1130 if (i->i_active == DEVI_BROKEN) { 1131 cfgerror("not removing broken instance `%s'", i->i_name); 1132 return; 1133 } 1134 1135 /* 1136 * We have the device instance, i. 1137 * We have to: 1138 * - delete the alias 1139 * 1140 * If the devi was an alias of an already listed devi, all is 1141 * good we don't have to do more. 1142 * If it was the first alias, we have to replace i's entry in 1143 * d's list by its first alias. 1144 * If it was the only entry, we must remove i's entry from d's 1145 * list. 1146 */ 1147 if (i != f) { 1148 for (j = f; j->i_alias != i; j = j->i_alias); 1149 j->i_alias = i->i_alias; 1150 } else { 1151 if (i->i_alias == NULL) { 1152 /* No alias, must unlink the entry from devitab */ 1153 ht_remove(devitab, i->i_name); 1154 j = i->i_bsame; 1155 } else { 1156 /* Or have the first alias replace i in d's list */ 1157 i->i_alias->i_bsame = i->i_bsame; 1158 j = i->i_alias; 1159 if (i == f) 1160 ht_replace(devitab, i->i_name, i->i_alias); 1161 } 1162 1163 /* 1164 * - remove/replace the instance from the devbase's list 1165 * 1166 * A double-linked list would make this much easier. Oh, well, 1167 * what is done is done. 1168 */ 1169 for (ppi = &d->d_ihead; 1170 *ppi != NULL && *ppi != i && (*ppi)->i_bsame != i; 1171 ppi = &(*ppi)->i_bsame); 1172 if (*ppi == NULL) 1173 panic("deldev: dev (%s) doesn't list the devi" 1174 " (%s at %s)", d->d_name, i->i_name, i->i_at); 1175 f = *ppi; 1176 if (f == i) 1177 /* That implies d->d_ihead == i */ 1178 *ppi = j; 1179 else 1180 (*ppi)->i_bsame = j; 1181 if (d->d_ipp == &i->i_bsame) { 1182 if (i->i_alias == NULL) { 1183 if (f == i) 1184 d->d_ipp = &d->d_ihead; 1185 else 1186 d->d_ipp = &f->i_bsame; 1187 } else 1188 d->d_ipp = &i->i_alias->i_bsame; 1189 } 1190 } 1191 /* 1192 * - delete the attachment instance 1193 */ 1194 iba = i->i_atdeva; 1195 for (ppi = &iba->d_ihead; 1196 *ppi != NULL && *ppi != i && (*ppi)->i_asame != i; 1197 ppi = &(*ppi)->i_asame); 1198 if (*ppi == NULL) 1199 panic("deldev: deva (%s) doesn't list the devi (%s)", 1200 iba->d_name, i->i_name); 1201 f = *ppi; 1202 if (f == i) 1203 /* That implies iba->d_ihead == i */ 1204 *ppi = i->i_asame; 1205 else 1206 (*ppi)->i_asame = i->i_asame; 1207 if (iba->d_ipp == &i->i_asame) { 1208 if (f == i) 1209 iba->d_ipp = &iba->d_ihead; 1210 else 1211 iba->d_ipp = &f->i_asame; 1212 } 1213 /* 1214 * - delete the pspec 1215 */ 1216 if (i->i_pspec) { 1217 struct pspec *p = i->i_pspec; 1218 struct nvlist *nv, *onv; 1219 1220 /* Double-linked nvlist anyone? */ 1221 for (nv = p->p_devs; nv->nv_next != NULL; nv = nv->nv_next) { 1222 if (nv->nv_next && nv->nv_next->nv_ptr == i) { 1223 onv = nv->nv_next; 1224 nv->nv_next = onv->nv_next; 1225 nvfree(onv); 1226 break; 1227 } 1228 if (nv->nv_ptr == i) { 1229 /* nv is p->p_devs in that case */ 1230 p->p_devs = nv->nv_next; 1231 nvfree(nv); 1232 break; 1233 } 1234 } 1235 if (p->p_devs == NULL) 1236 TAILQ_REMOVE(&allpspecs, p, p_list); 1237 } 1238 /* 1239 * - delete the alldevi entry 1240 */ 1241 TAILQ_REMOVE(&alldevi, i, i_next); 1242 ndevi--; 1243 /* 1244 * Put it in deaddevitab 1245 * 1246 * Each time a devi is removed, devilevel is increased so that later on 1247 * it is possible to tell if an instance was added before or after the 1248 * removal of its parent. 1249 * 1250 * For active instances, i_level contains the number of devi removed so 1251 * far, and for dead devis, it contains its index. 1252 */ 1253 i->i_level = devilevel++; 1254 i->i_alias = NULL; 1255 f = ht_lookup(deaddevitab, i->i_name); 1256 if (f == NULL) { 1257 if (ht_insert(deaddevitab, i->i_name, i)) 1258 panic("remove_devi(%s) - can't add to deaddevitab", 1259 i->i_name); 1260 } else { 1261 for (j = f; j->i_alias != NULL; j = j->i_alias); 1262 j->i_alias = i; 1263 } 1264 /* 1265 * - reconstruct d->d_umax 1266 */ 1267 d->d_umax = 0; 1268 for (i = d->d_ihead; i != NULL; i = i->i_bsame) 1269 if (i->i_unit >= d->d_umax) 1270 d->d_umax = i->i_unit + 1; 1271 } 1272 1273 void 1274 deldeva(const char *at) 1275 { 1276 int unit; 1277 const char *cp; 1278 struct devbase *d, *ad; 1279 struct devi *i, *j; 1280 struct attr *a; 1281 struct pspec *p; 1282 struct nvlist *nv, *stack = NULL; 1283 1284 if (at == NULL) { 1285 TAILQ_FOREACH(i, &alldevi, i_next) 1286 if (i->i_at == NULL) 1287 stack = newnv(NULL, NULL, i, 0, stack); 1288 } else { 1289 int l; 1290 1291 l = strlen(at) - 1; 1292 if (at[l] == '?' || isdigit((unsigned char)at[l])) { 1293 char base[NAMESIZE]; 1294 1295 if (split(at, l+1, base, sizeof base, &unit)) { 1296 cfgerror("invalid attachment name `%s'", at); 1297 return; 1298 } 1299 cp = intern(base); 1300 } else { 1301 cp = intern(at); 1302 unit = STAR; 1303 } 1304 1305 ad = ht_lookup(devbasetab, cp); 1306 a = ht_lookup(attrtab, cp); 1307 if (a == NULL) { 1308 cfgerror("unknown attachment attribute or device `%s'", 1309 cp); 1310 return; 1311 } 1312 if (!a->a_iattr) { 1313 cfgerror("plain attribute `%s' cannot have children", 1314 a->a_name); 1315 return; 1316 } 1317 1318 /* 1319 * remove_devi() makes changes to the devbase's list and the 1320 * alias list, * so the actual deletion of the instances must 1321 * be delayed. 1322 */ 1323 for (nv = a->a_devs; nv != NULL; nv = nv->nv_next) { 1324 d = nv->nv_ptr; 1325 for (i = d->d_ihead; i != NULL; i = i->i_bsame) 1326 for (j = i; j != NULL; j = j->i_alias) { 1327 /* Ignore devices at root */ 1328 if (j->i_at == NULL) 1329 continue; 1330 p = j->i_pspec; 1331 /* 1332 * There are three cases: 1333 * 1334 * 1. unit is not STAR. Consider 'at' 1335 * to be explicit, even if it 1336 * references an interface 1337 * attribute. 1338 * 1339 * 2. unit is STAR and 'at' references 1340 * a real device. Look for pspec 1341 * that have a matching p_atdev 1342 * field. 1343 * 1344 * 3. unit is STAR and 'at' references 1345 * an interface attribute. Look 1346 * for pspec that have a matching 1347 * p_iattr field. 1348 */ 1349 if ((unit != STAR && /* Case */ 1350 !strcmp(j->i_at, at)) || /* 1 */ 1351 (unit == STAR && 1352 ((ad != NULL && /* Case */ 1353 p->p_atdev == ad) || /* 2 */ 1354 (ad == NULL && /* Case */ 1355 p->p_iattr == a)))) /* 3 */ 1356 stack = newnv(NULL, NULL, j, 0, 1357 stack); 1358 } 1359 } 1360 } 1361 1362 for (nv = stack; nv != NULL; nv = nv->nv_next) 1363 remove_devi(nv->nv_ptr); 1364 nvfreel(stack); 1365 } 1366 1367 void 1368 deldev(const char *name) 1369 { 1370 int l; 1371 struct devi *firsti, *i; 1372 struct nvlist *nv, *stack = NULL; 1373 1374 l = strlen(name) - 1; 1375 if (name[l] == '*' || isdigit((unsigned char)name[l])) { 1376 /* `no mydev0' or `no mydev*' */ 1377 firsti = ht_lookup(devitab, name); 1378 if (firsti == NULL) { 1379 cfgerror("unknown instance %s", name); 1380 return; 1381 } 1382 for (i = firsti; i != NULL; i = i->i_alias) 1383 stack = newnv(NULL, NULL, i, 0, stack); 1384 } else { 1385 struct devbase *d = ht_lookup(devbasetab, name); 1386 1387 if (d == NULL) { 1388 cfgerror("unknown device %s", name); 1389 return; 1390 } 1391 if (d->d_ispseudo) { 1392 cfgerror("%s is a pseudo-device; " 1393 "use \"no pseudo-device %s\" instead", name, 1394 name); 1395 return; 1396 } 1397 1398 for (firsti = d->d_ihead; firsti != NULL; 1399 firsti = firsti->i_bsame) 1400 for (i = firsti; i != NULL; i = i->i_alias) 1401 stack = newnv(NULL, NULL, i, 0, stack); 1402 } 1403 1404 for (nv = stack; nv != NULL; nv = nv->nv_next) 1405 remove_devi(nv->nv_ptr); 1406 nvfreel(stack); 1407 } 1408 1409 void 1410 addpseudo(const char *name, int number) 1411 { 1412 struct devbase *d; 1413 struct devi *i; 1414 1415 d = ht_lookup(devbasetab, name); 1416 if (d == NULL) { 1417 cfgerror("undefined pseudo-device %s", name); 1418 return; 1419 } 1420 if (!d->d_ispseudo) { 1421 cfgerror("%s is a real device, not a pseudo-device", name); 1422 return; 1423 } 1424 if (ht_lookup(devitab, name) != NULL) { 1425 cfgerror("`%s' already defined", name); 1426 return; 1427 } 1428 i = newdevi(name, number - 1, d); /* foo 16 => "foo0..foo15" */ 1429 if (ht_insert(devitab, name, i)) 1430 panic("addpseudo(%s)", name); 1431 /* Useful to retrieve the instance from the devbase */ 1432 d->d_ihead = i; 1433 i->i_active = DEVI_ACTIVE; 1434 TAILQ_INSERT_TAIL(&allpseudo, i, i_next); 1435 } 1436 1437 void 1438 delpseudo(const char *name) 1439 { 1440 struct devbase *d; 1441 struct devi *i; 1442 1443 d = ht_lookup(devbasetab, name); 1444 if (d == NULL) { 1445 cfgerror("undefined pseudo-device %s", name); 1446 return; 1447 } 1448 if (!d->d_ispseudo) { 1449 cfgerror("%s is a real device, not a pseudo-device", name); 1450 return; 1451 } 1452 if ((i = ht_lookup(devitab, name)) == NULL) { 1453 cfgerror("`%s' not defined", name); 1454 return; 1455 } 1456 d->d_umax = 0; /* clear neads-count entries */ 1457 d->d_ihead = NULL; /* make sure it won't be considered active */ 1458 TAILQ_REMOVE(&allpseudo, i, i_next); 1459 if (ht_remove(devitab, name)) 1460 panic("delpseudo(%s) - can't remove from devitab", name); 1461 if (ht_insert(deaddevitab, name, i)) 1462 panic("delpseudo(%s) - can't add to deaddevitab", name); 1463 } 1464 1465 void 1466 adddevm(const char *name, devmajor_t cmajor, devmajor_t bmajor, 1467 struct nvlist *nv) 1468 { 1469 struct devm *dm; 1470 1471 if (cmajor != NODEVMAJOR && (cmajor < 0 || cmajor >= 4096)) { 1472 cfgerror("character major %d is invalid", cmajor); 1473 nvfreel(nv); 1474 return; 1475 } 1476 1477 if (bmajor != NODEVMAJOR && (bmajor < 0 || bmajor >= 4096)) { 1478 cfgerror("block major %d is invalid", bmajor); 1479 nvfreel(nv); 1480 return; 1481 } 1482 if (cmajor == NODEVMAJOR && bmajor == NODEVMAJOR) { 1483 cfgerror("both character/block majors are not specified"); 1484 nvfreel(nv); 1485 return; 1486 } 1487 1488 dm = ecalloc(1, sizeof(*dm)); 1489 dm->dm_srcfile = yyfile; 1490 dm->dm_srcline = currentline(); 1491 dm->dm_name = name; 1492 dm->dm_cmajor = cmajor; 1493 dm->dm_bmajor = bmajor; 1494 dm->dm_opts = nv; 1495 1496 TAILQ_INSERT_TAIL(&alldevms, dm, dm_next); 1497 1498 maxcdevm = MAX(maxcdevm, dm->dm_cmajor); 1499 maxbdevm = MAX(maxbdevm, dm->dm_bmajor); 1500 } 1501 1502 int 1503 fixdevis(void) 1504 { 1505 struct devi *i; 1506 int error = 0; 1507 1508 TAILQ_FOREACH(i, &alldevi, i_next) 1509 if (i->i_active == DEVI_ACTIVE) 1510 selectbase(i->i_base, i->i_atdeva); 1511 else if (i->i_active == DEVI_ORPHAN) { 1512 /* 1513 * At this point, we can't have instances for which 1514 * i_at or i_pspec are NULL. 1515 */ 1516 ++error; 1517 cfgxerror(i->i_srcfile, i->i_lineno, 1518 "`%s at %s' is orphaned (%s `%s' found)", 1519 i->i_name, i->i_at, i->i_pspec->p_atunit == WILD ? 1520 "nothing matching" : "no", i->i_at); 1521 } else if (vflag && i->i_active == DEVI_IGNORED) 1522 cfgxwarn(i->i_srcfile, i->i_lineno, "ignoring " 1523 "explicitly orphaned instance `%s at %s'", 1524 i->i_name, i->i_at); 1525 1526 if (error) 1527 return error; 1528 1529 TAILQ_FOREACH(i, &allpseudo, i_next) 1530 if (i->i_active == DEVI_ACTIVE) 1531 selectbase(i->i_base, NULL); 1532 return 0; 1533 } 1534 1535 /* 1536 * Look up a parent spec, creating a new one if it does not exist. 1537 */ 1538 static struct pspec * 1539 getpspec(struct attr *attr, struct devbase *ab, int atunit) 1540 { 1541 struct pspec *p; 1542 1543 TAILQ_FOREACH(p, &allpspecs, p_list) { 1544 if (p->p_iattr == attr && 1545 p->p_atdev == ab && 1546 p->p_atunit == atunit) 1547 return (p); 1548 } 1549 1550 p = ecalloc(1, sizeof(*p)); 1551 1552 p->p_iattr = attr; 1553 p->p_atdev = ab; 1554 p->p_atunit = atunit; 1555 p->p_inst = npspecs++; 1556 p->p_active = 0; 1557 1558 TAILQ_INSERT_TAIL(&allpspecs, p, p_list); 1559 1560 return (p); 1561 } 1562 1563 /* 1564 * Define a new instance of a specific device. 1565 */ 1566 static struct devi * 1567 getdevi(const char *name) 1568 { 1569 struct devi *i, *firsti; 1570 struct devbase *d; 1571 int unit; 1572 char base[NAMESIZE]; 1573 1574 if (split(name, strlen(name), base, sizeof base, &unit)) { 1575 cfgerror("invalid device name `%s'", name); 1576 return (NULL); 1577 } 1578 d = ht_lookup(devbasetab, intern(base)); 1579 if (d == NULL) { 1580 cfgerror("%s: unknown device `%s'", name, base); 1581 return (NULL); 1582 } 1583 if (d->d_ispseudo) { 1584 cfgerror("%s: %s is a pseudo-device", name, base); 1585 return (NULL); 1586 } 1587 firsti = ht_lookup(devitab, name); 1588 i = newdevi(name, unit, d); 1589 if (firsti == NULL) { 1590 if (ht_insert(devitab, name, i)) 1591 panic("getdevi(%s)", name); 1592 *d->d_ipp = i; 1593 d->d_ipp = &i->i_bsame; 1594 } else { 1595 while (firsti->i_alias) 1596 firsti = firsti->i_alias; 1597 firsti->i_alias = i; 1598 } 1599 TAILQ_INSERT_TAIL(&alldevi, i, i_next); 1600 ndevi++; 1601 return (i); 1602 } 1603 1604 static const char * 1605 concat(const char *name, int c) 1606 { 1607 size_t len; 1608 char buf[NAMESIZE]; 1609 1610 len = strlen(name); 1611 if (len + 2 > sizeof(buf)) { 1612 cfgerror("device name `%s%c' too long", name, c); 1613 len = sizeof(buf) - 2; 1614 } 1615 memmove(buf, name, len); 1616 buf[len] = c; 1617 buf[len + 1] = 0; 1618 return (intern(buf)); 1619 } 1620 1621 const char * 1622 starref(const char *name) 1623 { 1624 1625 return (concat(name, '*')); 1626 } 1627 1628 const char * 1629 wildref(const char *name) 1630 { 1631 1632 return (concat(name, '?')); 1633 } 1634 1635 /* 1636 * Split a name like "foo0" into base name (foo) and unit number (0). 1637 * Return 0 on success. To make this useful for names like "foo0a", 1638 * the length of the "foo0" part is one of the arguments. 1639 */ 1640 static int 1641 split(const char *name, size_t nlen, char *base, size_t bsize, int *aunit) 1642 { 1643 const char *cp; 1644 int c; 1645 size_t l; 1646 1647 l = nlen; 1648 if (l < 2 || l >= bsize || isdigit((unsigned char)*name)) 1649 return (1); 1650 c = (u_char)name[--l]; 1651 if (!isdigit(c)) { 1652 if (c == '*') 1653 *aunit = STAR; 1654 else if (c == '?') 1655 *aunit = WILD; 1656 else 1657 return (1); 1658 } else { 1659 cp = &name[l]; 1660 while (isdigit((unsigned char)cp[-1])) 1661 l--, cp--; 1662 *aunit = atoi(cp); 1663 } 1664 memmove(base, name, l); 1665 base[l] = 0; 1666 return (0); 1667 } 1668 1669 void 1670 selectattr(struct attr *a) 1671 { 1672 1673 (void)ht_insert(selecttab, a->a_name, __UNCONST(a->a_name)); 1674 } 1675 1676 /* 1677 * We have an instance of the base foo, so select it and all its 1678 * attributes for "optional foo". 1679 */ 1680 static void 1681 selectbase(struct devbase *d, struct deva *da) 1682 { 1683 struct attr *a; 1684 struct nvlist *nv; 1685 1686 (void)ht_insert(selecttab, d->d_name, __UNCONST(d->d_name)); 1687 for (nv = d->d_attrs; nv != NULL; nv = nv->nv_next) { 1688 a = nv->nv_ptr; 1689 expandattr(a, selectattr); 1690 } 1691 if (da != NULL) { 1692 (void)ht_insert(selecttab, da->d_name, __UNCONST(da->d_name)); 1693 for (nv = da->d_attrs; nv != NULL; nv = nv->nv_next) { 1694 a = nv->nv_ptr; 1695 expandattr(a, selectattr); 1696 } 1697 } 1698 } 1699 1700 /* 1701 * Is the given pointer on the given list of pointers? 1702 */ 1703 int 1704 onlist(struct nvlist *nv, void *ptr) 1705 { 1706 for (; nv != NULL; nv = nv->nv_next) 1707 if (nv->nv_ptr == ptr) 1708 return (1); 1709 return (0); 1710 } 1711 1712 static char * 1713 extend(char *p, const char *name) 1714 { 1715 size_t l; 1716 1717 l = strlen(name); 1718 memmove(p, name, l); 1719 p += l; 1720 *p++ = ','; 1721 *p++ = ' '; 1722 return (p); 1723 } 1724 1725 /* 1726 * Check that we got all required locators, and default any that are 1727 * given as "?" and have defaults. Return 0 on success. 1728 */ 1729 static const char ** 1730 fixloc(const char *name, struct attr *attr, struct nvlist *got) 1731 { 1732 struct nvlist *m, *n; 1733 int ord; 1734 const char **lp; 1735 int nmissing, nextra, nnodefault; 1736 char *mp, *ep, *ndp; 1737 char missing[1000], extra[1000], nodefault[1000]; 1738 static const char *nullvec[1]; 1739 1740 /* 1741 * Look for all required locators, and number the given ones 1742 * according to the required order. While we are numbering, 1743 * set default values for defaulted locators. 1744 */ 1745 if (attr->a_loclen == 0) /* e.g., "at root" */ 1746 lp = nullvec; 1747 else 1748 lp = emalloc((attr->a_loclen + 1) * sizeof(const char *)); 1749 for (n = got; n != NULL; n = n->nv_next) 1750 n->nv_num = -1; 1751 nmissing = 0; 1752 mp = missing; 1753 /* yes, this is O(mn), but m and n should be small */ 1754 for (ord = 0, m = attr->a_locs; m != NULL; m = m->nv_next, ord++) { 1755 for (n = got; n != NULL; n = n->nv_next) { 1756 if (n->nv_name == m->nv_name) { 1757 n->nv_num = ord; 1758 break; 1759 } 1760 } 1761 if (n == NULL && m->nv_num == 0) { 1762 nmissing++; 1763 mp = extend(mp, m->nv_name); 1764 } 1765 lp[ord] = m->nv_str; 1766 } 1767 if (ord != attr->a_loclen) 1768 panic("fixloc"); 1769 lp[ord] = NULL; 1770 nextra = 0; 1771 ep = extra; 1772 nnodefault = 0; 1773 ndp = nodefault; 1774 for (n = got; n != NULL; n = n->nv_next) { 1775 if (n->nv_num >= 0) { 1776 if (n->nv_str != NULL) 1777 lp[n->nv_num] = n->nv_str; 1778 else if (lp[n->nv_num] == NULL) { 1779 nnodefault++; 1780 ndp = extend(ndp, n->nv_name); 1781 } 1782 } else { 1783 nextra++; 1784 ep = extend(ep, n->nv_name); 1785 } 1786 } 1787 if (nextra) { 1788 ep[-2] = 0; /* kill ", " */ 1789 cfgerror("%s: extraneous locator%s: %s", 1790 name, nextra > 1 ? "s" : "", extra); 1791 } 1792 if (nmissing) { 1793 mp[-2] = 0; 1794 cfgerror("%s: must specify %s", name, missing); 1795 } 1796 if (nnodefault) { 1797 ndp[-2] = 0; 1798 cfgerror("%s: cannot wildcard %s", name, nodefault); 1799 } 1800 if (nmissing || nnodefault) { 1801 free(lp); 1802 lp = NULL; 1803 } 1804 return (lp); 1805 } 1806 1807 void 1808 setversion(int newver) 1809 { 1810 if (newver > CONFIG_VERSION) 1811 cfgerror("your sources require a newer version of config(1) " 1812 "-- please rebuild it."); 1813 else if (newver < CONFIG_MINVERSION) 1814 cfgerror("your sources are out of date -- please update."); 1815 else 1816 version = newver; 1817 } 1818