1 /* $NetBSD: sem.c,v 1.30 2008/07/07 16:10:27 cube 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(int, int); 87 static const char *major2name(int); 88 static int 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 = NODEV; 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, int n) 635 { 636 637 if (d != &errdev && d->d_major != NODEV) 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(int 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 int 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 (NODEV); 677 } 678 679 /* 680 * Make a string description of the device at maj/min. 681 */ 682 static const char * 683 makedevstr(int maj, int 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 int maj, min, i, l; 711 int unit; 712 char buf[NAMESIZE]; 713 714 if ((u_int)(part -= 'a') >= maxpartitions) 715 panic("resolve"); 716 if ((nv = *nvp) == NULL) { 717 dev_t d = NODEV; 718 /* 719 * Apply default. Easiest to do this by number. 720 * Make sure to retain NODEVness, if this is dflt's disposition. 721 */ 722 if (dflt->nv_int != NODEV) { 723 maj = major(dflt->nv_int); 724 min = ((minor(dflt->nv_int) / maxpartitions) * 725 maxpartitions) + part; 726 d = makedev(maj, min); 727 cp = makedevstr(maj, min); 728 } else 729 cp = NULL; 730 *nvp = nv = newnv(NULL, cp, NULL, d, NULL); 731 } 732 if (nv->nv_int != NODEV) { 733 /* 734 * By the numbers. Find the appropriate major number 735 * to make a name. 736 */ 737 maj = major(nv->nv_int); 738 min = minor(nv->nv_int); 739 nv->nv_str = makedevstr(maj, min); 740 return (0); 741 } 742 743 if (nv->nv_str == NULL || nv->nv_str == s_qmark) 744 /* 745 * Wildcarded or unspecified; leave it as NODEV. 746 */ 747 return (0); 748 749 /* 750 * The normal case: things like "ra2b". Check for partition 751 * suffix, remove it if there, and split into name ("ra") and 752 * unit (2). 753 */ 754 l = i = strlen(nv->nv_str); 755 cp = &nv->nv_str[l]; 756 if (l > 1 && *--cp >= 'a' && *cp < 'a' + maxpartitions && 757 isdigit((unsigned char)cp[-1])) { 758 l--; 759 part = *cp - 'a'; 760 } 761 cp = nv->nv_str; 762 if (split(cp, l, buf, sizeof buf, &unit)) { 763 cfgerror("%s: invalid %s device name `%s'", name, what, cp); 764 return (1); 765 } 766 dev = ht_lookup(devbasetab, intern(buf)); 767 if (dev == NULL) { 768 cfgerror("%s: device `%s' does not exist", name, buf); 769 return (1); 770 } 771 772 /* 773 * Check for the magic network interface attribute, and 774 * don't bother making a device number. 775 */ 776 if (has_attr(dev->d_attrs, s_ifnet)) { 777 nv->nv_int = NODEV; 778 nv->nv_ifunit = unit; /* XXX XXX XXX */ 779 } else { 780 maj = dev2major(dev); 781 if (maj == NODEV) { 782 cfgerror("%s: can't make %s device from `%s'", 783 name, what, nv->nv_str); 784 return (1); 785 } 786 nv->nv_int = makedev(maj, unit * maxpartitions + part); 787 } 788 789 nv->nv_name = dev->d_name; 790 return (0); 791 } 792 793 /* 794 * Add a completed configuration to the list. 795 */ 796 void 797 addconf(struct config *cf0) 798 { 799 struct config *cf; 800 const char *name; 801 802 name = cf0->cf_name; 803 cf = ecalloc(1, sizeof *cf); 804 if (ht_insert(cfhashtab, name, cf)) { 805 cfgerror("configuration `%s' already defined", name); 806 free(cf); 807 goto bad; 808 } 809 *cf = *cf0; 810 811 /* 812 * Resolve the root device. 813 */ 814 if (cf->cf_root == NULL) { 815 cfgerror("%s: no root device specified", name); 816 goto bad; 817 } 818 if (cf->cf_root && cf->cf_root->nv_str != s_qmark) { 819 struct nvlist *nv; 820 nv = cf->cf_root; 821 if (resolve(&cf->cf_root, name, "root", nv, 'a')) 822 goto bad; 823 } 824 825 /* 826 * Resolve the dump device. 827 */ 828 if (cf->cf_dump == NULL || cf->cf_dump->nv_str == s_qmark) { 829 /* 830 * Wildcarded dump device is equivalent to unspecified. 831 */ 832 cf->cf_dump = NULL; 833 } else if (cf->cf_dump->nv_str == s_none) { 834 /* 835 * Operator has requested that no dump device should be 836 * configured; do nothing. 837 */ 838 } else { 839 if (resolve(&cf->cf_dump, name, "dumps", cf->cf_dump, 'b')) 840 goto bad; 841 } 842 843 /* Wildcarded fstype is `unspecified'. */ 844 if (cf->cf_fstype == s_qmark) 845 cf->cf_fstype = NULL; 846 847 TAILQ_INSERT_TAIL(&allcf, cf, cf_next); 848 return; 849 bad: 850 nvfreel(cf0->cf_root); 851 nvfreel(cf0->cf_dump); 852 } 853 854 void 855 setconf(struct nvlist **npp, const char *what, struct nvlist *v) 856 { 857 858 if (*npp != NULL) { 859 cfgerror("duplicate %s specification", what); 860 nvfreel(v); 861 } else 862 *npp = v; 863 } 864 865 void 866 delconf(const char *name) 867 { 868 struct config *cf; 869 870 if (ht_lookup(cfhashtab, name) == NULL) { 871 cfgerror("configuration `%s' undefined", name); 872 return; 873 } 874 (void)ht_remove(cfhashtab, name); 875 876 TAILQ_FOREACH(cf, &allcf, cf_next) 877 if (!strcmp(cf->cf_name, name)) 878 break; 879 if (cf == NULL) 880 panic("lost configuration `%s'", name); 881 882 TAILQ_REMOVE(&allcf, cf, cf_next); 883 } 884 885 void 886 setfstype(const char **fstp, const char *v) 887 { 888 889 if (*fstp != NULL) { 890 cfgerror("multiple fstype specifications"); 891 return; 892 } 893 894 if (v != s_qmark && OPT_FSOPT(v)) { 895 cfgerror("\"%s\" is not a configured file system", v); 896 return; 897 } 898 899 *fstp = v; 900 } 901 902 static struct devi * 903 newdevi(const char *name, int unit, struct devbase *d) 904 { 905 struct devi *i; 906 907 i = ecalloc(1, sizeof *i); 908 i->i_name = name; 909 i->i_unit = unit; 910 i->i_base = d; 911 i->i_bsame = NULL; 912 i->i_asame = NULL; 913 i->i_alias = NULL; 914 i->i_at = NULL; 915 i->i_pspec = NULL; 916 i->i_atdeva = NULL; 917 i->i_locs = NULL; 918 i->i_cfflags = 0; 919 i->i_lineno = currentline(); 920 i->i_srcfile = yyfile; 921 i->i_active = DEVI_ORPHAN; /* Proper analysis comes later */ 922 i->i_level = devilevel; 923 if (unit >= d->d_umax) 924 d->d_umax = unit + 1; 925 return (i); 926 } 927 928 /* 929 * Add the named device as attaching to the named attribute (or perhaps 930 * another device instead) plus unit number. 931 */ 932 void 933 adddev(const char *name, const char *at, struct nvlist *loclist, int flags) 934 { 935 struct devi *i; /* the new instance */ 936 struct pspec *p; /* and its pspec */ 937 struct attr *attr; /* attribute that allows attach */ 938 struct devbase *ib; /* i->i_base */ 939 struct devbase *ab; /* not NULL => at another dev */ 940 struct nvlist *nv; 941 struct deva *iba; /* devbase attachment used */ 942 const char *cp; 943 int atunit; 944 char atbuf[NAMESIZE]; 945 int hit; 946 947 ab = NULL; 948 iba = NULL; 949 if (at == NULL) { 950 /* "at root" */ 951 p = NULL; 952 if ((i = getdevi(name)) == NULL) 953 goto bad; 954 /* 955 * Must warn about i_unit > 0 later, after taking care of 956 * the STAR cases (we could do non-star's here but why 957 * bother?). Make sure this device can be at root. 958 */ 959 ib = i->i_base; 960 hit = 0; 961 for (iba = ib->d_ahead; iba != NULL; iba = iba->d_bsame) 962 if (onlist(iba->d_atlist, NULL)) { 963 hit = 1; 964 break; 965 } 966 if (!hit) { 967 cfgerror("`%s' cannot attach to the root", ib->d_name); 968 i->i_active = DEVI_BROKEN; 969 goto bad; 970 } 971 attr = &errattr; /* a convenient "empty" attr */ 972 } else { 973 if (split(at, strlen(at), atbuf, sizeof atbuf, &atunit)) { 974 cfgerror("invalid attachment name `%s'", at); 975 /* (void)getdevi(name); -- ??? */ 976 goto bad; 977 } 978 if ((i = getdevi(name)) == NULL) 979 goto bad; 980 ib = i->i_base; 981 982 /* 983 * Devices can attach to two types of things: Attributes, 984 * and other devices (which have the appropriate attributes 985 * to allow attachment). 986 * 987 * (1) If we're attached to an attribute, then we don't need 988 * look at the parent base device to see what attributes 989 * it has, and make sure that we can attach to them. 990 * 991 * (2) If we're attached to a real device (i.e. named in 992 * the config file), we want to remember that so that 993 * at cross-check time, if the device we're attached to 994 * is missing but other devices which also provide the 995 * attribute are present, we don't get a false "OK." 996 * 997 * (3) If the thing we're attached to is an attribute 998 * but is actually named in the config file, we still 999 * have to remember its devbase. 1000 */ 1001 cp = intern(atbuf); 1002 1003 /* Figure out parent's devbase, to satisfy case (3). */ 1004 ab = ht_lookup(devbasetab, cp); 1005 1006 /* Find out if it's an attribute. */ 1007 attr = ht_lookup(attrtab, cp); 1008 1009 /* Make sure we're _really_ attached to the attr. Case (1). */ 1010 if (attr != NULL && onlist(attr->a_devs, ib)) 1011 goto findattachment; 1012 1013 /* 1014 * Else a real device, and not just an attribute. Case (2). 1015 * 1016 * Have to work a bit harder to see whether we have 1017 * something like "tg0 at esp0" (where esp is merely 1018 * not an attribute) or "tg0 at nonesuch0" (where 1019 * nonesuch is not even a device). 1020 */ 1021 if (ab == NULL) { 1022 cfgerror("%s at %s: `%s' unknown", 1023 name, at, atbuf); 1024 i->i_active = DEVI_BROKEN; 1025 goto bad; 1026 } 1027 1028 /* 1029 * See if the named parent carries an attribute 1030 * that allows it to supervise device ib. 1031 */ 1032 for (nv = ab->d_attrs; nv != NULL; nv = nv->nv_next) { 1033 attr = nv->nv_ptr; 1034 if (onlist(attr->a_devs, ib)) 1035 goto findattachment; 1036 } 1037 cfgerror("`%s' cannot attach to `%s'", ib->d_name, atbuf); 1038 i->i_active = DEVI_BROKEN; 1039 goto bad; 1040 1041 findattachment: 1042 /* 1043 * Find the parent spec. If a matching one has not yet been 1044 * created, create one. 1045 */ 1046 p = getpspec(attr, ab, atunit); 1047 p->p_devs = newnv(NULL, NULL, i, 0, p->p_devs); 1048 1049 /* find out which attachment it uses */ 1050 hit = 0; 1051 for (iba = ib->d_ahead; iba != NULL; iba = iba->d_bsame) 1052 if (onlist(iba->d_atlist, attr)) { 1053 hit = 1; 1054 break; 1055 } 1056 if (!hit) 1057 panic("adddev: can't figure out attachment"); 1058 } 1059 if ((i->i_locs = fixloc(name, attr, loclist)) == NULL) { 1060 i->i_active = DEVI_BROKEN; 1061 goto bad; 1062 } 1063 i->i_at = at; 1064 i->i_pspec = p; 1065 i->i_atdeva = iba; 1066 i->i_cfflags = flags; 1067 1068 *iba->d_ipp = i; 1069 iba->d_ipp = &i->i_asame; 1070 1071 /* all done, fall into ... */ 1072 bad: 1073 nvfreel(loclist); 1074 return; 1075 } 1076 1077 void 1078 deldevi(const char *name, const char *at) 1079 { 1080 struct devi *firsti, *i; 1081 struct devbase *d; 1082 int unit; 1083 char base[NAMESIZE]; 1084 1085 if (split(name, strlen(name), base, sizeof base, &unit)) { 1086 cfgerror("invalid device name `%s'", name); 1087 return; 1088 } 1089 d = ht_lookup(devbasetab, intern(base)); 1090 if (d == NULL) { 1091 cfgerror("%s: unknown device `%s'", name, base); 1092 return; 1093 } 1094 if (d->d_ispseudo) { 1095 cfgerror("%s: %s is a pseudo-device", name, base); 1096 return; 1097 } 1098 if ((firsti = ht_lookup(devitab, name)) == NULL) { 1099 cfgerror("`%s' not defined", name); 1100 return; 1101 } 1102 if (at == NULL && firsti->i_at == NULL) { 1103 /* 'at root' */ 1104 remove_devi(firsti); 1105 return; 1106 } else if (at != NULL) 1107 for (i = firsti; i != NULL; i = i->i_alias) 1108 if (i->i_active != DEVI_BROKEN && 1109 strcmp(at, i->i_at) == 0) { 1110 remove_devi(i); 1111 return; 1112 } 1113 cfgerror("`%s' at `%s' not found", name, at ? at : "root"); 1114 } 1115 1116 static void 1117 remove_devi(struct devi *i) 1118 { 1119 struct devbase *d = i->i_base; 1120 struct devi *f, *j, **ppi; 1121 struct deva *iba; 1122 1123 f = ht_lookup(devitab, i->i_name); 1124 if (f == NULL) 1125 panic("remove_devi(): instance %s disappeared from devitab", 1126 i->i_name); 1127 1128 if (i->i_active == DEVI_BROKEN) { 1129 cfgerror("not removing broken instance `%s'", i->i_name); 1130 return; 1131 } 1132 1133 /* 1134 * We have the device instance, i. 1135 * We have to: 1136 * - delete the alias 1137 * 1138 * If the devi was an alias of an already listed devi, all is 1139 * good we don't have to do more. 1140 * If it was the first alias, we have to replace i's entry in 1141 * d's list by its first alias. 1142 * If it was the only entry, we must remove i's entry from d's 1143 * list. 1144 */ 1145 if (i != f) { 1146 for (j = f; j->i_alias != i; j = j->i_alias); 1147 j->i_alias = i->i_alias; 1148 } else { 1149 if (i->i_alias == NULL) { 1150 /* No alias, must unlink the entry from devitab */ 1151 ht_remove(devitab, i->i_name); 1152 j = i->i_bsame; 1153 } else { 1154 /* Or have the first alias replace i in d's list */ 1155 i->i_alias->i_bsame = i->i_bsame; 1156 j = i->i_alias; 1157 if (i == f) 1158 ht_replace(devitab, i->i_name, i->i_alias); 1159 } 1160 1161 /* 1162 * - remove/replace the instance from the devbase's list 1163 * 1164 * A double-linked list would make this much easier. Oh, well, 1165 * what is done is done. 1166 */ 1167 for (ppi = &d->d_ihead; 1168 *ppi != NULL && *ppi != i && (*ppi)->i_bsame != i; 1169 ppi = &(*ppi)->i_bsame); 1170 if (*ppi == NULL) 1171 panic("deldev: dev (%s) doesn't list the devi" 1172 " (%s at %s)", d->d_name, i->i_name, i->i_at); 1173 f = *ppi; 1174 if (f == i) 1175 /* That implies d->d_ihead == i */ 1176 *ppi = j; 1177 else 1178 (*ppi)->i_bsame = j; 1179 if (d->d_ipp == &i->i_bsame) { 1180 if (i->i_alias == NULL) { 1181 if (f == i) 1182 d->d_ipp = &d->d_ihead; 1183 else 1184 d->d_ipp = &f->i_bsame; 1185 } else 1186 d->d_ipp = &i->i_alias->i_bsame; 1187 } 1188 } 1189 /* 1190 * - delete the attachment instance 1191 */ 1192 iba = i->i_atdeva; 1193 for (ppi = &iba->d_ihead; 1194 *ppi != NULL && *ppi != i && (*ppi)->i_asame != i; 1195 ppi = &(*ppi)->i_asame); 1196 if (*ppi == NULL) 1197 panic("deldev: deva (%s) doesn't list the devi (%s)", 1198 iba->d_name, i->i_name); 1199 f = *ppi; 1200 if (f == i) 1201 /* That implies iba->d_ihead == i */ 1202 *ppi = i->i_asame; 1203 else 1204 (*ppi)->i_asame = i->i_asame; 1205 if (iba->d_ipp == &i->i_asame) { 1206 if (f == i) 1207 iba->d_ipp = &iba->d_ihead; 1208 else 1209 iba->d_ipp = &f->i_asame; 1210 } 1211 /* 1212 * - delete the pspec 1213 */ 1214 if (i->i_pspec) { 1215 struct pspec *p = i->i_pspec; 1216 struct nvlist *nv, *onv; 1217 1218 /* Double-linked nvlist anyone? */ 1219 for (nv = p->p_devs; nv->nv_next != NULL; nv = nv->nv_next) { 1220 if (nv->nv_next && nv->nv_next->nv_ptr == i) { 1221 onv = nv->nv_next; 1222 nv->nv_next = onv->nv_next; 1223 nvfree(onv); 1224 break; 1225 } 1226 if (nv->nv_ptr == i) { 1227 /* nv is p->p_devs in that case */ 1228 p->p_devs = nv->nv_next; 1229 nvfree(nv); 1230 break; 1231 } 1232 } 1233 if (p->p_devs == NULL) 1234 TAILQ_REMOVE(&allpspecs, p, p_list); 1235 } 1236 /* 1237 * - delete the alldevi entry 1238 */ 1239 TAILQ_REMOVE(&alldevi, i, i_next); 1240 ndevi--; 1241 /* 1242 * Put it in deaddevitab 1243 * 1244 * Each time a devi is removed, devilevel is increased so that later on 1245 * it is possible to tell if an instance was added before or after the 1246 * removal of its parent. 1247 * 1248 * For active instances, i_level contains the number of devi removed so 1249 * far, and for dead devis, it contains its index. 1250 */ 1251 i->i_level = devilevel++; 1252 i->i_alias = NULL; 1253 f = ht_lookup(deaddevitab, i->i_name); 1254 if (f == NULL) { 1255 if (ht_insert(deaddevitab, i->i_name, i)) 1256 panic("remove_devi(%s) - can't add to deaddevitab", 1257 i->i_name); 1258 } else { 1259 for (j = f; j->i_alias != NULL; j = j->i_alias); 1260 j->i_alias = i; 1261 } 1262 /* 1263 * - reconstruct d->d_umax 1264 */ 1265 d->d_umax = 0; 1266 for (i = d->d_ihead; i != NULL; i = i->i_bsame) 1267 if (i->i_unit >= d->d_umax) 1268 d->d_umax = i->i_unit + 1; 1269 } 1270 1271 void 1272 deldeva(const char *at) 1273 { 1274 int unit; 1275 const char *cp; 1276 struct devbase *d, *ad; 1277 struct devi *i, *j; 1278 struct attr *a; 1279 struct pspec *p; 1280 struct nvlist *nv, *stack = NULL; 1281 1282 if (at == NULL) { 1283 TAILQ_FOREACH(i, &alldevi, i_next) 1284 if (i->i_at == NULL) 1285 stack = newnv(NULL, NULL, i, 0, stack); 1286 } else { 1287 int l; 1288 1289 l = strlen(at) - 1; 1290 if (at[l] == '?' || isdigit((unsigned char)at[l])) { 1291 char base[NAMESIZE]; 1292 1293 if (split(at, l+1, base, sizeof base, &unit)) { 1294 cfgerror("invalid attachment name `%s'", at); 1295 return; 1296 } 1297 cp = intern(base); 1298 } else { 1299 cp = intern(at); 1300 unit = STAR; 1301 } 1302 1303 ad = ht_lookup(devbasetab, cp); 1304 a = ht_lookup(attrtab, cp); 1305 if (a == NULL) { 1306 cfgerror("unknown attachment attribute or device `%s'", 1307 cp); 1308 return; 1309 } 1310 if (!a->a_iattr) { 1311 cfgerror("plain attribute `%s' cannot have children", 1312 a->a_name); 1313 return; 1314 } 1315 1316 /* 1317 * remove_devi() makes changes to the devbase's list and the 1318 * alias list, * so the actual deletion of the instances must 1319 * be delayed. 1320 */ 1321 for (nv = a->a_devs; nv != NULL; nv = nv->nv_next) { 1322 d = nv->nv_ptr; 1323 for (i = d->d_ihead; i != NULL; i = i->i_bsame) 1324 for (j = i; j != NULL; j = j->i_alias) { 1325 /* Ignore devices at root */ 1326 if (j->i_at == NULL) 1327 continue; 1328 p = j->i_pspec; 1329 /* 1330 * There are three cases: 1331 * 1332 * 1. unit is not STAR. Consider 'at' 1333 * to be explicit, even if it 1334 * references an interface 1335 * attribute. 1336 * 1337 * 2. unit is STAR and 'at' references 1338 * a real device. Look for pspec 1339 * that have a matching p_atdev 1340 * field. 1341 * 1342 * 3. unit is STAR and 'at' references 1343 * an interface attribute. Look 1344 * for pspec that have a matching 1345 * p_iattr field. 1346 */ 1347 if ((unit != STAR && /* Case */ 1348 !strcmp(j->i_at, at)) || /* 1 */ 1349 (unit == STAR && 1350 ((ad != NULL && /* Case */ 1351 p->p_atdev == ad) || /* 2 */ 1352 (ad == NULL && /* Case */ 1353 p->p_iattr == a)))) /* 3 */ 1354 stack = newnv(NULL, NULL, j, 0, 1355 stack); 1356 } 1357 } 1358 } 1359 1360 for (nv = stack; nv != NULL; nv = nv->nv_next) 1361 remove_devi(nv->nv_ptr); 1362 nvfreel(stack); 1363 } 1364 1365 void 1366 deldev(const char *name) 1367 { 1368 int l; 1369 struct devi *firsti, *i; 1370 struct nvlist *nv, *stack = NULL; 1371 1372 l = strlen(name) - 1; 1373 if (name[l] == '*' || isdigit((unsigned char)name[l])) { 1374 /* `no mydev0' or `no mydev*' */ 1375 firsti = ht_lookup(devitab, name); 1376 if (firsti == NULL) { 1377 cfgerror("unknown instance %s", name); 1378 return; 1379 } 1380 for (i = firsti; i != NULL; i = i->i_alias) 1381 stack = newnv(NULL, NULL, i, 0, stack); 1382 } else { 1383 struct devbase *d = ht_lookup(devbasetab, name); 1384 1385 if (d == NULL) { 1386 cfgerror("unknown device %s", name); 1387 return; 1388 } 1389 if (d->d_ispseudo) { 1390 cfgerror("%s is a pseudo-device; " 1391 "use \"no pseudo-device %s\" instead", name, 1392 name); 1393 return; 1394 } 1395 1396 for (firsti = d->d_ihead; firsti != NULL; 1397 firsti = firsti->i_bsame) 1398 for (i = firsti; i != NULL; i = i->i_alias) 1399 stack = newnv(NULL, NULL, i, 0, stack); 1400 } 1401 1402 for (nv = stack; nv != NULL; nv = nv->nv_next) 1403 remove_devi(nv->nv_ptr); 1404 nvfreel(stack); 1405 } 1406 1407 void 1408 addpseudo(const char *name, int number) 1409 { 1410 struct devbase *d; 1411 struct devi *i; 1412 1413 d = ht_lookup(devbasetab, name); 1414 if (d == NULL) { 1415 cfgerror("undefined pseudo-device %s", name); 1416 return; 1417 } 1418 if (!d->d_ispseudo) { 1419 cfgerror("%s is a real device, not a pseudo-device", name); 1420 return; 1421 } 1422 if (ht_lookup(devitab, name) != NULL) { 1423 cfgerror("`%s' already defined", name); 1424 return; 1425 } 1426 i = newdevi(name, number - 1, d); /* foo 16 => "foo0..foo15" */ 1427 if (ht_insert(devitab, name, i)) 1428 panic("addpseudo(%s)", name); 1429 /* Useful to retrieve the instance from the devbase */ 1430 d->d_ihead = i; 1431 i->i_active = DEVI_ACTIVE; 1432 TAILQ_INSERT_TAIL(&allpseudo, i, i_next); 1433 } 1434 1435 void 1436 delpseudo(const char *name) 1437 { 1438 struct devbase *d; 1439 struct devi *i; 1440 1441 d = ht_lookup(devbasetab, name); 1442 if (d == NULL) { 1443 cfgerror("undefined pseudo-device %s", name); 1444 return; 1445 } 1446 if (!d->d_ispseudo) { 1447 cfgerror("%s is a real device, not a pseudo-device", name); 1448 return; 1449 } 1450 if ((i = ht_lookup(devitab, name)) == NULL) { 1451 cfgerror("`%s' not defined", name); 1452 return; 1453 } 1454 d->d_umax = 0; /* clear neads-count entries */ 1455 d->d_ihead = NULL; /* make sure it won't be considered active */ 1456 TAILQ_REMOVE(&allpseudo, i, i_next); 1457 if (ht_remove(devitab, name)) 1458 panic("delpseudo(%s) - can't remove from devitab", name); 1459 if (ht_insert(deaddevitab, name, i)) 1460 panic("delpseudo(%s) - can't add to deaddevitab", name); 1461 } 1462 1463 void 1464 adddevm(const char *name, int cmajor, int bmajor, struct nvlist *options) 1465 { 1466 struct devm *dm; 1467 1468 if (cmajor < -1 || cmajor >= 4096) { 1469 cfgerror("character major %d is invalid", cmajor); 1470 nvfreel(options); 1471 return; 1472 } 1473 1474 if (bmajor < -1 || bmajor >= 4096) { 1475 cfgerror("block major %d is invalid", bmajor); 1476 nvfreel(options); 1477 return; 1478 } 1479 if (cmajor == -1 && bmajor == -1) { 1480 cfgerror("both character/block majors are not specified"); 1481 nvfreel(options); 1482 return; 1483 } 1484 1485 dm = ecalloc(1, sizeof(*dm)); 1486 dm->dm_srcfile = yyfile; 1487 dm->dm_srcline = currentline(); 1488 dm->dm_name = name; 1489 dm->dm_cmajor = cmajor; 1490 dm->dm_bmajor = bmajor; 1491 dm->dm_opts = options; 1492 1493 TAILQ_INSERT_TAIL(&alldevms, dm, dm_next); 1494 1495 maxcdevm = MAX(maxcdevm, dm->dm_cmajor); 1496 maxbdevm = MAX(maxbdevm, dm->dm_bmajor); 1497 } 1498 1499 int 1500 fixdevis(void) 1501 { 1502 struct devi *i; 1503 int error = 0; 1504 1505 TAILQ_FOREACH(i, &alldevi, i_next) 1506 if (i->i_active == DEVI_ACTIVE) 1507 selectbase(i->i_base, i->i_atdeva); 1508 else if (i->i_active == DEVI_ORPHAN) { 1509 /* 1510 * At this point, we can't have instances for which 1511 * i_at or i_pspec are NULL. 1512 */ 1513 ++error; 1514 cfgxerror(i->i_srcfile, i->i_lineno, 1515 "`%s at %s' is orphaned (%s `%s' found)", 1516 i->i_name, i->i_at, i->i_pspec->p_atunit == WILD ? 1517 "nothing matching" : "no", i->i_at); 1518 } else if (vflag && i->i_active == DEVI_IGNORED) 1519 cfgxwarn(i->i_srcfile, i->i_lineno, "ignoring " 1520 "explicitly orphaned instance `%s at %s'", 1521 i->i_name, i->i_at); 1522 1523 if (error) 1524 return error; 1525 1526 TAILQ_FOREACH(i, &allpseudo, i_next) 1527 if (i->i_active == DEVI_ACTIVE) 1528 selectbase(i->i_base, NULL); 1529 return 0; 1530 } 1531 1532 /* 1533 * Look up a parent spec, creating a new one if it does not exist. 1534 */ 1535 static struct pspec * 1536 getpspec(struct attr *attr, struct devbase *ab, int atunit) 1537 { 1538 struct pspec *p; 1539 1540 TAILQ_FOREACH(p, &allpspecs, p_list) { 1541 if (p->p_iattr == attr && 1542 p->p_atdev == ab && 1543 p->p_atunit == atunit) 1544 return (p); 1545 } 1546 1547 p = ecalloc(1, sizeof(*p)); 1548 1549 p->p_iattr = attr; 1550 p->p_atdev = ab; 1551 p->p_atunit = atunit; 1552 p->p_inst = npspecs++; 1553 p->p_active = 0; 1554 1555 TAILQ_INSERT_TAIL(&allpspecs, p, p_list); 1556 1557 return (p); 1558 } 1559 1560 /* 1561 * Define a new instance of a specific device. 1562 */ 1563 static struct devi * 1564 getdevi(const char *name) 1565 { 1566 struct devi *i, *firsti; 1567 struct devbase *d; 1568 int unit; 1569 char base[NAMESIZE]; 1570 1571 if (split(name, strlen(name), base, sizeof base, &unit)) { 1572 cfgerror("invalid device name `%s'", name); 1573 return (NULL); 1574 } 1575 d = ht_lookup(devbasetab, intern(base)); 1576 if (d == NULL) { 1577 cfgerror("%s: unknown device `%s'", name, base); 1578 return (NULL); 1579 } 1580 if (d->d_ispseudo) { 1581 cfgerror("%s: %s is a pseudo-device", name, base); 1582 return (NULL); 1583 } 1584 firsti = ht_lookup(devitab, name); 1585 i = newdevi(name, unit, d); 1586 if (firsti == NULL) { 1587 if (ht_insert(devitab, name, i)) 1588 panic("getdevi(%s)", name); 1589 *d->d_ipp = i; 1590 d->d_ipp = &i->i_bsame; 1591 } else { 1592 while (firsti->i_alias) 1593 firsti = firsti->i_alias; 1594 firsti->i_alias = i; 1595 } 1596 TAILQ_INSERT_TAIL(&alldevi, i, i_next); 1597 ndevi++; 1598 return (i); 1599 } 1600 1601 static const char * 1602 concat(const char *name, int c) 1603 { 1604 size_t len; 1605 char buf[NAMESIZE]; 1606 1607 len = strlen(name); 1608 if (len + 2 > sizeof(buf)) { 1609 cfgerror("device name `%s%c' too long", name, c); 1610 len = sizeof(buf) - 2; 1611 } 1612 memmove(buf, name, len); 1613 buf[len] = c; 1614 buf[len + 1] = 0; 1615 return (intern(buf)); 1616 } 1617 1618 const char * 1619 starref(const char *name) 1620 { 1621 1622 return (concat(name, '*')); 1623 } 1624 1625 const char * 1626 wildref(const char *name) 1627 { 1628 1629 return (concat(name, '?')); 1630 } 1631 1632 /* 1633 * Split a name like "foo0" into base name (foo) and unit number (0). 1634 * Return 0 on success. To make this useful for names like "foo0a", 1635 * the length of the "foo0" part is one of the arguments. 1636 */ 1637 static int 1638 split(const char *name, size_t nlen, char *base, size_t bsize, int *aunit) 1639 { 1640 const char *cp; 1641 int c; 1642 size_t l; 1643 1644 l = nlen; 1645 if (l < 2 || l >= bsize || isdigit((unsigned char)*name)) 1646 return (1); 1647 c = (u_char)name[--l]; 1648 if (!isdigit(c)) { 1649 if (c == '*') 1650 *aunit = STAR; 1651 else if (c == '?') 1652 *aunit = WILD; 1653 else 1654 return (1); 1655 } else { 1656 cp = &name[l]; 1657 while (isdigit((unsigned char)cp[-1])) 1658 l--, cp--; 1659 *aunit = atoi(cp); 1660 } 1661 memmove(base, name, l); 1662 base[l] = 0; 1663 return (0); 1664 } 1665 1666 void 1667 selectattr(struct attr *a) 1668 { 1669 1670 (void)ht_insert(selecttab, a->a_name, __UNCONST(a->a_name)); 1671 } 1672 1673 /* 1674 * We have an instance of the base foo, so select it and all its 1675 * attributes for "optional foo". 1676 */ 1677 static void 1678 selectbase(struct devbase *d, struct deva *da) 1679 { 1680 struct attr *a; 1681 struct nvlist *nv; 1682 1683 (void)ht_insert(selecttab, d->d_name, __UNCONST(d->d_name)); 1684 for (nv = d->d_attrs; nv != NULL; nv = nv->nv_next) { 1685 a = nv->nv_ptr; 1686 expandattr(a, selectattr); 1687 } 1688 if (da != NULL) { 1689 (void)ht_insert(selecttab, da->d_name, __UNCONST(da->d_name)); 1690 for (nv = da->d_attrs; nv != NULL; nv = nv->nv_next) { 1691 a = nv->nv_ptr; 1692 expandattr(a, selectattr); 1693 } 1694 } 1695 } 1696 1697 /* 1698 * Is the given pointer on the given list of pointers? 1699 */ 1700 int 1701 onlist(struct nvlist *nv, void *ptr) 1702 { 1703 for (; nv != NULL; nv = nv->nv_next) 1704 if (nv->nv_ptr == ptr) 1705 return (1); 1706 return (0); 1707 } 1708 1709 static char * 1710 extend(char *p, const char *name) 1711 { 1712 size_t l; 1713 1714 l = strlen(name); 1715 memmove(p, name, l); 1716 p += l; 1717 *p++ = ','; 1718 *p++ = ' '; 1719 return (p); 1720 } 1721 1722 /* 1723 * Check that we got all required locators, and default any that are 1724 * given as "?" and have defaults. Return 0 on success. 1725 */ 1726 static const char ** 1727 fixloc(const char *name, struct attr *attr, struct nvlist *got) 1728 { 1729 struct nvlist *m, *n; 1730 int ord; 1731 const char **lp; 1732 int nmissing, nextra, nnodefault; 1733 char *mp, *ep, *ndp; 1734 char missing[1000], extra[1000], nodefault[1000]; 1735 static const char *nullvec[1]; 1736 1737 /* 1738 * Look for all required locators, and number the given ones 1739 * according to the required order. While we are numbering, 1740 * set default values for defaulted locators. 1741 */ 1742 if (attr->a_loclen == 0) /* e.g., "at root" */ 1743 lp = nullvec; 1744 else 1745 lp = emalloc((attr->a_loclen + 1) * sizeof(const char *)); 1746 for (n = got; n != NULL; n = n->nv_next) 1747 n->nv_int = -1; 1748 nmissing = 0; 1749 mp = missing; 1750 /* yes, this is O(mn), but m and n should be small */ 1751 for (ord = 0, m = attr->a_locs; m != NULL; m = m->nv_next, ord++) { 1752 for (n = got; n != NULL; n = n->nv_next) { 1753 if (n->nv_name == m->nv_name) { 1754 n->nv_int = ord; 1755 break; 1756 } 1757 } 1758 if (n == NULL && m->nv_int == 0) { 1759 nmissing++; 1760 mp = extend(mp, m->nv_name); 1761 } 1762 lp[ord] = m->nv_str; 1763 } 1764 if (ord != attr->a_loclen) 1765 panic("fixloc"); 1766 lp[ord] = NULL; 1767 nextra = 0; 1768 ep = extra; 1769 nnodefault = 0; 1770 ndp = nodefault; 1771 for (n = got; n != NULL; n = n->nv_next) { 1772 if (n->nv_int >= 0) { 1773 if (n->nv_str != NULL) 1774 lp[n->nv_int] = n->nv_str; 1775 else if (lp[n->nv_int] == NULL) { 1776 nnodefault++; 1777 ndp = extend(ndp, n->nv_name); 1778 } 1779 } else { 1780 nextra++; 1781 ep = extend(ep, n->nv_name); 1782 } 1783 } 1784 if (nextra) { 1785 ep[-2] = 0; /* kill ", " */ 1786 cfgerror("%s: extraneous locator%s: %s", 1787 name, nextra > 1 ? "s" : "", extra); 1788 } 1789 if (nmissing) { 1790 mp[-2] = 0; 1791 cfgerror("%s: must specify %s", name, missing); 1792 } 1793 if (nnodefault) { 1794 ndp[-2] = 0; 1795 cfgerror("%s: cannot wildcard %s", name, nodefault); 1796 } 1797 if (nmissing || nnodefault) { 1798 free(lp); 1799 lp = NULL; 1800 } 1801 return (lp); 1802 } 1803 1804 void 1805 setversion(int newver) 1806 { 1807 if (newver > CONFIG_VERSION) 1808 cfgerror("your sources require a newer version of config(1) " 1809 "-- please rebuild it."); 1810 else if (newver < CONFIG_MINVERSION) 1811 cfgerror("your sources are out of date -- please update."); 1812 else 1813 version = newver; 1814 } 1815