1 /*- 2 * Copyright (c) 1998 Michael Smith <msmith@freebsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 /* 31 * file/module function dispatcher, support, etc. 32 */ 33 34 #include <stand.h> 35 #include <string.h> 36 #include <sys/param.h> 37 #include <sys/linker.h> 38 #include <sys/module.h> 39 #include <sys/queue.h> 40 #include <sys/stdint.h> 41 42 #if defined(LOADER_FDT_SUPPORT) 43 #include <fdt_platform.h> 44 #endif 45 46 #include "bootstrap.h" 47 48 #define MDIR_REMOVED 0x0001 49 #define MDIR_NOHINTS 0x0002 50 51 struct moduledir { 52 char *d_path; /* path of modules directory */ 53 u_char *d_hints; /* content of linker.hints file */ 54 int d_hintsz; /* size of hints data */ 55 int d_flags; 56 STAILQ_ENTRY(moduledir) d_link; 57 }; 58 59 static int file_load(char *filename, vm_offset_t dest, struct preloaded_file **result); 60 static int file_load_dependencies(struct preloaded_file *base_mod); 61 static char * file_search(const char *name, char **extlist); 62 static struct kernel_module * file_findmodule(struct preloaded_file *fp, char *modname, struct mod_depend *verinfo); 63 static int file_havepath(const char *name); 64 static char *mod_searchmodule(char *name, struct mod_depend *verinfo); 65 static char * mod_searchmodule_pnpinfo(const char *bus, const char *pnpinfo); 66 static void file_insert_tail(struct preloaded_file *mp); 67 static void file_remove(struct preloaded_file *fp); 68 struct file_metadata* metadata_next(struct file_metadata *base_mp, int type); 69 static void moduledir_readhints(struct moduledir *mdp); 70 static void moduledir_rebuild(void); 71 72 /* load address should be tweaked by first module loaded (kernel) */ 73 static vm_offset_t loadaddr = 0; 74 75 #if defined(LOADER_FDT_SUPPORT) 76 static const char *default_searchpath = 77 "/boot/kernel;/boot/modules;/boot/dtb"; 78 #else 79 static const char *default_searchpath = "/boot/kernel;/boot/modules"; 80 #endif 81 82 static STAILQ_HEAD(, moduledir) moduledir_list = 83 STAILQ_HEAD_INITIALIZER(moduledir_list); 84 85 struct preloaded_file *preloaded_files = NULL; 86 87 static char *kld_ext_list[] = { 88 ".ko", 89 "", 90 ".debug", 91 NULL 92 }; 93 94 95 /* 96 * load an object, either a disk file or code module. 97 * 98 * To load a file, the syntax is: 99 * 100 * load -t <type> <path> 101 * 102 * code modules are loaded as: 103 * 104 * load <path> <options> 105 */ 106 107 COMMAND_SET(load, "load", "load a kernel or module", command_load); 108 109 static int 110 command_load(int argc, char *argv[]) 111 { 112 struct preloaded_file *fp; 113 char *typestr; 114 char *prefix; 115 char *skip; 116 int dflag, dofile, dokld, ch, error; 117 118 dflag = dokld = dofile = 0; 119 optind = 1; 120 optreset = 1; 121 typestr = NULL; 122 if (argc == 1) { 123 command_errmsg = "no filename specified"; 124 return (CMD_CRIT); 125 } 126 prefix = skip = NULL; 127 while ((ch = getopt(argc, argv, "dkp:s:t:")) != -1) { 128 switch(ch) { 129 case 'd': 130 dflag++; 131 break; 132 case 'k': 133 dokld = 1; 134 break; 135 case 'p': 136 prefix = optarg; 137 break; 138 case 's': 139 skip = optarg; 140 break; 141 case 't': 142 typestr = optarg; 143 dofile = 1; 144 break; 145 case '?': 146 default: 147 /* getopt has already reported an error */ 148 return (CMD_OK); 149 } 150 } 151 argv += (optind - 1); 152 argc -= (optind - 1); 153 154 /* 155 * Request to load a raw file? 156 */ 157 if (dofile) { 158 if ((argc != 2) || (typestr == NULL) || (*typestr == 0)) { 159 command_errmsg = "invalid load type"; 160 return (CMD_CRIT); 161 } 162 163 #ifdef LOADER_VERIEXEC 164 if (strncmp(typestr, "manifest", 8) == 0) { 165 if (dflag > 0) 166 ve_debug_set(dflag); 167 return (load_manifest(argv[1], prefix, skip, NULL)); 168 } 169 #ifdef LOADER_VERIEXEC_PASS_MANIFEST 170 if (strncmp(typestr, "pass_manifest", 13) == 0) { 171 if (dflag > 0) 172 ve_debug_set(dflag); 173 return (pass_manifest(argv[1], prefix)); 174 } 175 #endif 176 #endif 177 178 fp = file_findfile(argv[1], typestr); 179 if (fp) { 180 snprintf(command_errbuf, sizeof(command_errbuf), 181 "warning: file '%s' already loaded", argv[1]); 182 return (CMD_WARN); 183 } 184 185 if (file_loadraw(argv[1], typestr, 1) != NULL) 186 return (CMD_OK); 187 188 /* Failing to load mfs_root is never going to end well! */ 189 if (strcmp("mfs_root", typestr) == 0) 190 return (CMD_FATAL); 191 192 return (CMD_ERROR); 193 } 194 /* 195 * Do we have explicit KLD load ? 196 */ 197 if (dokld || file_havepath(argv[1])) { 198 error = mod_loadkld(argv[1], argc - 2, argv + 2); 199 if (error == EEXIST) { 200 snprintf(command_errbuf, sizeof(command_errbuf), 201 "warning: KLD '%s' already loaded", argv[1]); 202 return (CMD_WARN); 203 } 204 205 return (error == 0 ? CMD_OK : CMD_CRIT); 206 } 207 /* 208 * Looks like a request for a module. 209 */ 210 error = mod_load(argv[1], NULL, argc - 2, argv + 2); 211 if (error == EEXIST) { 212 snprintf(command_errbuf, sizeof(command_errbuf), 213 "warning: module '%s' already loaded", argv[1]); 214 return (CMD_WARN); 215 } 216 217 return (error == 0 ? CMD_OK : CMD_CRIT); 218 } 219 220 #ifdef LOADER_GELI_SUPPORT 221 COMMAND_SET(load_geli, "load_geli", "load a geli key", command_load_geli); 222 223 static int 224 command_load_geli(int argc, char *argv[]) 225 { 226 char typestr[80]; 227 char *cp; 228 int ch, num; 229 230 if (argc < 3) { 231 command_errmsg = "usage is [-n key#] <prov> <file>"; 232 return(CMD_ERROR); 233 } 234 235 num = 0; 236 optind = 1; 237 optreset = 1; 238 while ((ch = getopt(argc, argv, "n:")) != -1) { 239 switch(ch) { 240 case 'n': 241 num = strtol(optarg, &cp, 0); 242 if (cp == optarg) { 243 snprintf(command_errbuf, sizeof(command_errbuf), 244 "bad key index '%s'", optarg); 245 return(CMD_ERROR); 246 } 247 break; 248 case '?': 249 default: 250 /* getopt has already reported an error */ 251 return(CMD_OK); 252 } 253 } 254 argv += (optind - 1); 255 argc -= (optind - 1); 256 sprintf(typestr, "%s:geli_keyfile%d", argv[1], num); 257 return (file_loadraw(argv[2], typestr, 1) ? CMD_OK : CMD_ERROR); 258 } 259 #endif 260 261 void 262 unload(void) 263 { 264 struct preloaded_file *fp; 265 266 while (preloaded_files != NULL) { 267 fp = preloaded_files; 268 preloaded_files = preloaded_files->f_next; 269 file_discard(fp); 270 } 271 loadaddr = 0; 272 unsetenv("kernelname"); 273 } 274 275 COMMAND_SET(unload, "unload", "unload all modules", command_unload); 276 277 static int 278 command_unload(int argc, char *argv[]) 279 { 280 unload(); 281 return(CMD_OK); 282 } 283 284 COMMAND_SET(lsmod, "lsmod", "list loaded modules", command_lsmod); 285 286 static int 287 command_lsmod(int argc, char *argv[]) 288 { 289 struct preloaded_file *fp; 290 struct kernel_module *mp; 291 struct file_metadata *md; 292 char lbuf[80]; 293 int ch, verbose, ret = 0; 294 295 verbose = 0; 296 optind = 1; 297 optreset = 1; 298 while ((ch = getopt(argc, argv, "v")) != -1) { 299 switch(ch) { 300 case 'v': 301 verbose = 1; 302 break; 303 case '?': 304 default: 305 /* getopt has already reported an error */ 306 return(CMD_OK); 307 } 308 } 309 310 pager_open(); 311 for (fp = preloaded_files; fp; fp = fp->f_next) { 312 snprintf(lbuf, sizeof(lbuf), " %p: ", (void *) fp->f_addr); 313 pager_output(lbuf); 314 pager_output(fp->f_name); 315 snprintf(lbuf, sizeof(lbuf), " (%s, 0x%lx)\n", fp->f_type, 316 (long)fp->f_size); 317 if (pager_output(lbuf)) 318 break; 319 if (fp->f_args != NULL) { 320 pager_output(" args: "); 321 pager_output(fp->f_args); 322 if (pager_output("\n")) 323 break; 324 } 325 if (fp->f_modules) { 326 pager_output(" modules: "); 327 for (mp = fp->f_modules; mp; mp = mp->m_next) { 328 snprintf(lbuf, sizeof(lbuf), "%s.%d ", mp->m_name, 329 mp->m_version); 330 pager_output(lbuf); 331 } 332 if (pager_output("\n")) 333 break; 334 } 335 if (verbose) { 336 /* XXX could add some formatting smarts here to display some better */ 337 for (md = fp->f_metadata; md != NULL; md = md->md_next) { 338 snprintf(lbuf, sizeof(lbuf), " 0x%04x, 0x%lx\n", 339 md->md_type, (long) md->md_size); 340 if (pager_output(lbuf)) 341 break; 342 } 343 } 344 if (ret) 345 break; 346 } 347 pager_close(); 348 return(CMD_OK); 349 } 350 351 COMMAND_SET(pnpmatch, "pnpmatch", "list matched modules based on pnpinfo", command_pnpmatch); 352 353 static int pnp_dump_flag = 0; 354 static int pnp_unbound_flag = 0; 355 static int pnp_verbose_flag = 0; 356 357 static int 358 command_pnpmatch(int argc, char *argv[]) 359 { 360 char *module; 361 int ch; 362 363 pnp_verbose_flag = 0; 364 pnp_dump_flag = 0; 365 optind = 1; 366 optreset = 1; 367 while ((ch = getopt(argc, argv, "vd")) != -1) { 368 switch(ch) { 369 case 'v': 370 pnp_verbose_flag = 1; 371 break; 372 case 'd': 373 pnp_dump_flag = 1; 374 break; 375 case '?': 376 default: 377 /* getopt has already reported an error */ 378 return(CMD_OK); 379 } 380 } 381 argv += (optind - 1); 382 argc -= (optind - 1); 383 384 module = mod_searchmodule_pnpinfo(argv[1], argv[2]); 385 if (module) 386 printf("Matched module: %s\n", module); 387 else if(argv[1]) 388 printf("No module matches %s\n", argv[1]); 389 390 return (CMD_OK); 391 } 392 393 COMMAND_SET(pnpload, "pnpload", "load matched modules based on pnpinfo", command_pnpload); 394 395 static int 396 command_pnpload(int argc, char *argv[]) 397 { 398 char *module; 399 int ch, error; 400 401 pnp_verbose_flag = 0; 402 pnp_dump_flag = 0; 403 optind = 1; 404 optreset = 1; 405 while ((ch = getopt(argc, argv, "vd")) != -1) { 406 switch(ch) { 407 case 'v': 408 pnp_verbose_flag = 1; 409 break; 410 case 'd': 411 pnp_dump_flag = 1; 412 break; 413 case '?': 414 default: 415 /* getopt has already reported an error */ 416 return(CMD_OK); 417 } 418 } 419 argv += (optind - 1); 420 argc -= (optind - 1); 421 422 if (argc != 2) 423 return (CMD_ERROR); 424 425 module = mod_searchmodule_pnpinfo(argv[1], argv[2]); 426 427 error = mod_load(module, NULL, 0, NULL); 428 if (error == EEXIST) { 429 snprintf(command_errbuf, sizeof(command_errbuf), 430 "warning: module '%s' already loaded", argv[1]); 431 return (CMD_WARN); 432 } 433 434 return (error == 0 ? CMD_OK : CMD_CRIT); 435 } 436 437 #if defined(LOADER_FDT_SUPPORT) 438 static void 439 pnpautoload_simplebus(void) { 440 const char *pnpstring; 441 const char *compatstr; 442 char *pnpinfo = NULL; 443 char *module = NULL; 444 int tag = 0, len, pnplen; 445 int error; 446 447 while (1) { 448 pnpstring = fdt_devmatch_next(&tag, &len); 449 if (pnpstring == NULL) 450 return; 451 452 compatstr = pnpstring; 453 for (pnplen = 0; pnplen != len; compatstr = pnpstring + pnplen) { 454 pnplen += strlen(compatstr) + 1; 455 asprintf(&pnpinfo, "compat=%s", compatstr); 456 457 module = mod_searchmodule_pnpinfo("simplebus", pnpinfo); 458 if (module) { 459 error = mod_loadkld(module, 0, NULL); 460 if (error) 461 printf("Cannot load module %s\n", module); 462 break; 463 } 464 } 465 free(pnpinfo); 466 free(module); 467 } 468 } 469 #endif 470 471 struct pnp_bus { 472 const char *name; 473 void (*load)(void); 474 }; 475 476 struct pnp_bus pnp_buses[] = { 477 #if defined(LOADER_FDT_SUPPORT) 478 {"simplebus", pnpautoload_simplebus}, 479 #endif 480 }; 481 482 COMMAND_SET(pnpautoload, "pnpautoload", "auto load modules based on pnpinfo", command_pnpautoload); 483 484 static int 485 command_pnpautoload(int argc, char *argv[]) 486 { 487 int i; 488 int verbose; 489 int ch, match; 490 491 pnp_verbose_flag = 0; 492 pnp_dump_flag = 0; 493 verbose = 0; 494 optind = 1; 495 optreset = 1; 496 match = 0; 497 while ((ch = getopt(argc, argv, "v")) != -1) { 498 switch(ch) { 499 case 'v': 500 verbose = 1; 501 break; 502 case '?': 503 default: 504 /* getopt has already reported an error */ 505 return(CMD_OK); 506 } 507 } 508 argv += (optind - 1); 509 argc -= (optind - 1); 510 511 if (argc > 2) 512 return (CMD_ERROR); 513 514 for (i = 0; i < nitems(pnp_buses); i++) { 515 if (argc == 2 && strcmp(argv[1], pnp_buses[i].name) != 0) { 516 if (verbose) 517 printf("Skipping bus %s\n", pnp_buses[i].name); 518 continue; 519 } 520 if (verbose) 521 printf("Autoloading modules for simplebus\n"); 522 pnp_buses[i].load(); 523 match = 1; 524 } 525 if (match == 0) 526 printf("Unsupported bus %s\n", argv[1]); 527 528 return (CMD_OK); 529 } 530 531 /* 532 * File level interface, functions file_* 533 */ 534 int 535 file_load(char *filename, vm_offset_t dest, struct preloaded_file **result) 536 { 537 static int last_file_format = 0; 538 struct preloaded_file *fp; 539 int error; 540 int i; 541 542 if (archsw.arch_loadaddr != NULL) 543 dest = archsw.arch_loadaddr(LOAD_RAW, filename, dest); 544 545 error = EFTYPE; 546 for (i = last_file_format, fp = NULL; 547 file_formats[i] && fp == NULL; i++) { 548 error = (file_formats[i]->l_load)(filename, dest, &fp); 549 if (error == 0) { 550 fp->f_loader = last_file_format = i; /* remember the loader */ 551 *result = fp; 552 break; 553 } else if (last_file_format == i && i != 0) { 554 /* Restart from the beginning */ 555 i = -1; 556 last_file_format = 0; 557 fp = NULL; 558 continue; 559 } 560 if (error == EFTYPE) 561 continue; /* Unknown to this handler? */ 562 if (error) { 563 snprintf(command_errbuf, sizeof(command_errbuf), 564 "can't load file '%s': %s", filename, strerror(error)); 565 break; 566 } 567 } 568 return (error); 569 } 570 571 static int 572 file_load_dependencies(struct preloaded_file *base_file) 573 { 574 struct file_metadata *md; 575 struct preloaded_file *fp; 576 struct mod_depend *verinfo; 577 struct kernel_module *mp; 578 char *dmodname; 579 int error; 580 581 md = file_findmetadata(base_file, MODINFOMD_DEPLIST); 582 if (md == NULL) 583 return (0); 584 error = 0; 585 do { 586 verinfo = (struct mod_depend*)md->md_data; 587 dmodname = (char *)(verinfo + 1); 588 if (file_findmodule(NULL, dmodname, verinfo) == NULL) { 589 printf("loading required module '%s'\n", dmodname); 590 error = mod_load(dmodname, verinfo, 0, NULL); 591 if (error) 592 break; 593 /* 594 * If module loaded via kld name which isn't listed 595 * in the linker.hints file, we should check if it have 596 * required version. 597 */ 598 mp = file_findmodule(NULL, dmodname, verinfo); 599 if (mp == NULL) { 600 snprintf(command_errbuf, sizeof(command_errbuf), 601 "module '%s' exists but with wrong version", dmodname); 602 error = ENOENT; 603 break; 604 } 605 } 606 md = metadata_next(md, MODINFOMD_DEPLIST); 607 } while (md); 608 if (!error) 609 return (0); 610 /* Load failed; discard everything */ 611 while (base_file != NULL) { 612 fp = base_file; 613 base_file = base_file->f_next; 614 file_discard(fp); 615 } 616 return (error); 617 } 618 619 /* 620 * We've been asked to load (fname) as (type), so just suck it in, 621 * no arguments or anything. 622 */ 623 struct preloaded_file * 624 file_loadraw(const char *fname, char *type, int insert) 625 { 626 struct preloaded_file *fp; 627 char *name; 628 int fd, got; 629 vm_offset_t laddr; 630 631 /* We can't load first */ 632 if ((file_findfile(NULL, NULL)) == NULL) { 633 command_errmsg = "can't load file before kernel"; 634 return(NULL); 635 } 636 637 /* locate the file on the load path */ 638 name = file_search(fname, NULL); 639 if (name == NULL) { 640 snprintf(command_errbuf, sizeof(command_errbuf), 641 "can't find '%s'", fname); 642 return(NULL); 643 } 644 645 if ((fd = open(name, O_RDONLY)) < 0) { 646 snprintf(command_errbuf, sizeof(command_errbuf), 647 "can't open '%s': %s", name, strerror(errno)); 648 free(name); 649 return(NULL); 650 } 651 652 #ifdef LOADER_VERIEXEC 653 if (verify_file(fd, name, 0, VE_MUST) < 0) { 654 sprintf(command_errbuf, "can't verify '%s'", name); 655 free(name); 656 close(fd); 657 return(NULL); 658 } 659 #endif 660 661 if (archsw.arch_loadaddr != NULL) 662 loadaddr = archsw.arch_loadaddr(LOAD_RAW, name, loadaddr); 663 664 printf("%s ", name); 665 666 laddr = loadaddr; 667 for (;;) { 668 /* read in 4k chunks; size is not really important */ 669 got = archsw.arch_readin(fd, laddr, 4096); 670 if (got == 0) /* end of file */ 671 break; 672 if (got < 0) { /* error */ 673 snprintf(command_errbuf, sizeof(command_errbuf), 674 "error reading '%s': %s", name, strerror(errno)); 675 free(name); 676 close(fd); 677 return(NULL); 678 } 679 laddr += got; 680 } 681 682 printf("size=%#jx\n", (uintmax_t)(laddr - loadaddr)); 683 684 /* Looks OK so far; create & populate control structure */ 685 fp = file_alloc(); 686 if (fp == NULL) { 687 snprintf(command_errbuf, sizeof (command_errbuf), 688 "no memory to load %s", name); 689 free(name); 690 close(fd); 691 return (NULL); 692 } 693 fp->f_name = name; 694 fp->f_type = strdup(type); 695 fp->f_args = NULL; 696 fp->f_metadata = NULL; 697 fp->f_loader = -1; 698 fp->f_addr = loadaddr; 699 fp->f_size = laddr - loadaddr; 700 701 if (fp->f_type == NULL) { 702 snprintf(command_errbuf, sizeof (command_errbuf), 703 "no memory to load %s", name); 704 free(name); 705 close(fd); 706 return (NULL); 707 } 708 /* recognise space consumption */ 709 loadaddr = laddr; 710 711 /* Add to the list of loaded files */ 712 if (insert != 0) 713 file_insert_tail(fp); 714 close(fd); 715 return(fp); 716 } 717 718 /* 719 * Load the module (name), pass it (argc),(argv), add container file 720 * to the list of loaded files. 721 * If module is already loaded just assign new argc/argv. 722 */ 723 int 724 mod_load(char *modname, struct mod_depend *verinfo, int argc, char *argv[]) 725 { 726 struct kernel_module *mp; 727 int err; 728 char *filename; 729 730 if (file_havepath(modname)) { 731 printf("Warning: mod_load() called instead of mod_loadkld() for module '%s'\n", modname); 732 return (mod_loadkld(modname, argc, argv)); 733 } 734 /* see if module is already loaded */ 735 mp = file_findmodule(NULL, modname, verinfo); 736 if (mp) { 737 #ifdef moduleargs 738 free(mp->m_args); 739 mp->m_args = unargv(argc, argv); 740 #endif 741 snprintf(command_errbuf, sizeof(command_errbuf), 742 "warning: module '%s' already loaded", mp->m_name); 743 return (0); 744 } 745 /* locate file with the module on the search path */ 746 filename = mod_searchmodule(modname, verinfo); 747 if (filename == NULL) { 748 snprintf(command_errbuf, sizeof(command_errbuf), 749 "can't find '%s'", modname); 750 return (ENOENT); 751 } 752 err = mod_loadkld(filename, argc, argv); 753 free(filename); 754 return (err); 755 } 756 757 /* 758 * Load specified KLD. If path is omitted, then try to locate it via 759 * search path. 760 */ 761 int 762 mod_loadkld(const char *kldname, int argc, char *argv[]) 763 { 764 struct preloaded_file *fp; 765 int err; 766 char *filename; 767 vm_offset_t loadaddr_saved; 768 769 /* 770 * Get fully qualified KLD name 771 */ 772 filename = file_search(kldname, kld_ext_list); 773 if (filename == NULL) { 774 snprintf(command_errbuf, sizeof(command_errbuf), 775 "can't find '%s'", kldname); 776 return (ENOENT); 777 } 778 /* 779 * Check if KLD already loaded 780 */ 781 fp = file_findfile(filename, NULL); 782 if (fp) { 783 snprintf(command_errbuf, sizeof(command_errbuf), 784 "warning: KLD '%s' already loaded", filename); 785 free(filename); 786 return (0); 787 } 788 789 do { 790 err = file_load(filename, loadaddr, &fp); 791 if (err) 792 break; 793 fp->f_args = unargv(argc, argv); 794 loadaddr_saved = loadaddr; 795 loadaddr = fp->f_addr + fp->f_size; 796 file_insert_tail(fp); /* Add to the list of loaded files */ 797 if (file_load_dependencies(fp) != 0) { 798 err = ENOENT; 799 file_remove(fp); 800 loadaddr = loadaddr_saved; 801 fp = NULL; 802 break; 803 } 804 } while(0); 805 if (err == EFTYPE) { 806 snprintf(command_errbuf, sizeof(command_errbuf), 807 "don't know how to load module '%s'", filename); 808 } 809 if (err) 810 file_discard(fp); 811 free(filename); 812 return (err); 813 } 814 815 /* 816 * Find a file matching (name) and (type). 817 * NULL may be passed as a wildcard to either. 818 */ 819 struct preloaded_file * 820 file_findfile(const char *name, const char *type) 821 { 822 struct preloaded_file *fp; 823 824 for (fp = preloaded_files; fp != NULL; fp = fp->f_next) { 825 if (((name == NULL) || !strcmp(name, fp->f_name)) && 826 ((type == NULL) || !strcmp(type, fp->f_type))) 827 break; 828 } 829 return (fp); 830 } 831 832 /* 833 * Find a module matching (name) inside of given file. 834 * NULL may be passed as a wildcard. 835 */ 836 struct kernel_module * 837 file_findmodule(struct preloaded_file *fp, char *modname, 838 struct mod_depend *verinfo) 839 { 840 struct kernel_module *mp, *best; 841 int bestver, mver; 842 843 if (fp == NULL) { 844 for (fp = preloaded_files; fp; fp = fp->f_next) { 845 mp = file_findmodule(fp, modname, verinfo); 846 if (mp) 847 return (mp); 848 } 849 return (NULL); 850 } 851 best = NULL; 852 bestver = 0; 853 for (mp = fp->f_modules; mp; mp = mp->m_next) { 854 if (strcmp(modname, mp->m_name) == 0) { 855 if (verinfo == NULL) 856 return (mp); 857 mver = mp->m_version; 858 if (mver == verinfo->md_ver_preferred) 859 return (mp); 860 if (mver >= verinfo->md_ver_minimum && 861 mver <= verinfo->md_ver_maximum && 862 mver > bestver) { 863 best = mp; 864 bestver = mver; 865 } 866 } 867 } 868 return (best); 869 } 870 /* 871 * Make a copy of (size) bytes of data from (p), and associate them as 872 * metadata of (type) to the module (mp). 873 */ 874 void 875 file_addmetadata(struct preloaded_file *fp, int type, size_t size, void *p) 876 { 877 struct file_metadata *md; 878 879 md = malloc(sizeof(struct file_metadata) - sizeof(md->md_data) + size); 880 if (md != NULL) { 881 md->md_size = size; 882 md->md_type = type; 883 bcopy(p, md->md_data, size); 884 md->md_next = fp->f_metadata; 885 } 886 fp->f_metadata = md; 887 } 888 889 /* 890 * Find a metadata object of (type) associated with the file (fp) 891 */ 892 struct file_metadata * 893 file_findmetadata(struct preloaded_file *fp, int type) 894 { 895 struct file_metadata *md; 896 897 for (md = fp->f_metadata; md != NULL; md = md->md_next) 898 if (md->md_type == type) 899 break; 900 return(md); 901 } 902 903 /* 904 * Remove all metadata from the file. 905 */ 906 void 907 file_removemetadata(struct preloaded_file *fp) 908 { 909 struct file_metadata *md, *next; 910 911 for (md = fp->f_metadata; md != NULL; md = next) 912 { 913 next = md->md_next; 914 free(md); 915 } 916 fp->f_metadata = NULL; 917 } 918 919 struct file_metadata * 920 metadata_next(struct file_metadata *md, int type) 921 { 922 923 if (md == NULL) 924 return (NULL); 925 while((md = md->md_next) != NULL) 926 if (md->md_type == type) 927 break; 928 return (md); 929 } 930 931 static char *emptyextlist[] = { "", NULL }; 932 933 /* 934 * Check if the given file is in place and return full path to it. 935 */ 936 static char * 937 file_lookup(const char *path, const char *name, int namelen, char **extlist) 938 { 939 struct stat st; 940 char *result, *cp, **cpp; 941 int pathlen, extlen, len; 942 943 pathlen = strlen(path); 944 extlen = 0; 945 if (extlist == NULL) 946 extlist = emptyextlist; 947 for (cpp = extlist; *cpp; cpp++) { 948 len = strlen(*cpp); 949 if (len > extlen) 950 extlen = len; 951 } 952 result = malloc(pathlen + namelen + extlen + 2); 953 if (result == NULL) 954 return (NULL); 955 bcopy(path, result, pathlen); 956 if (pathlen > 0 && result[pathlen - 1] != '/') 957 result[pathlen++] = '/'; 958 cp = result + pathlen; 959 bcopy(name, cp, namelen); 960 cp += namelen; 961 for (cpp = extlist; *cpp; cpp++) { 962 strcpy(cp, *cpp); 963 if (stat(result, &st) == 0 && S_ISREG(st.st_mode)) 964 return result; 965 } 966 free(result); 967 return NULL; 968 } 969 970 /* 971 * Check if file name have any qualifiers 972 */ 973 static int 974 file_havepath(const char *name) 975 { 976 const char *cp; 977 978 archsw.arch_getdev(NULL, name, &cp); 979 return (cp != name || strchr(name, '/') != NULL); 980 } 981 982 /* 983 * Attempt to find the file (name) on the module searchpath. 984 * If (name) is qualified in any way, we simply check it and 985 * return it or NULL. If it is not qualified, then we attempt 986 * to construct a path using entries in the environment variable 987 * module_path. 988 * 989 * The path we return a pointer to need never be freed, as we manage 990 * it internally. 991 */ 992 static char * 993 file_search(const char *name, char **extlist) 994 { 995 struct moduledir *mdp; 996 struct stat sb; 997 char *result; 998 int namelen; 999 1000 /* Don't look for nothing */ 1001 if (name == NULL) 1002 return(NULL); 1003 1004 if (*name == 0) 1005 return(strdup(name)); 1006 1007 if (file_havepath(name)) { 1008 /* Qualified, so just see if it exists */ 1009 if (stat(name, &sb) == 0) 1010 return(strdup(name)); 1011 return(NULL); 1012 } 1013 moduledir_rebuild(); 1014 result = NULL; 1015 namelen = strlen(name); 1016 STAILQ_FOREACH(mdp, &moduledir_list, d_link) { 1017 result = file_lookup(mdp->d_path, name, namelen, extlist); 1018 if (result) 1019 break; 1020 } 1021 return(result); 1022 } 1023 1024 #define INT_ALIGN(base, ptr) ptr = \ 1025 (base) + roundup2((ptr) - (base), sizeof(int)) 1026 1027 static char * 1028 mod_search_hints(struct moduledir *mdp, const char *modname, 1029 struct mod_depend *verinfo) 1030 { 1031 u_char *cp, *recptr, *bufend, *best; 1032 char *result; 1033 int *intp, bestver, blen, clen, found, ival, modnamelen, reclen; 1034 1035 moduledir_readhints(mdp); 1036 modnamelen = strlen(modname); 1037 found = 0; 1038 result = NULL; 1039 bestver = 0; 1040 if (mdp->d_hints == NULL) 1041 goto bad; 1042 recptr = mdp->d_hints; 1043 bufend = recptr + mdp->d_hintsz; 1044 clen = blen = 0; 1045 best = cp = NULL; 1046 while (recptr < bufend && !found) { 1047 intp = (int*)recptr; 1048 reclen = *intp++; 1049 ival = *intp++; 1050 cp = (u_char*)intp; 1051 switch (ival) { 1052 case MDT_VERSION: 1053 clen = *cp++; 1054 if (clen != modnamelen || bcmp(cp, modname, clen) != 0) 1055 break; 1056 cp += clen; 1057 INT_ALIGN(mdp->d_hints, cp); 1058 ival = *(int*)cp; 1059 cp += sizeof(int); 1060 clen = *cp++; 1061 if (verinfo == NULL || ival == verinfo->md_ver_preferred) { 1062 found = 1; 1063 break; 1064 } 1065 if (ival >= verinfo->md_ver_minimum && 1066 ival <= verinfo->md_ver_maximum && 1067 ival > bestver) { 1068 bestver = ival; 1069 best = cp; 1070 blen = clen; 1071 } 1072 break; 1073 default: 1074 break; 1075 } 1076 recptr += reclen + sizeof(int); 1077 } 1078 /* 1079 * Finally check if KLD is in the place 1080 */ 1081 if (found) 1082 result = file_lookup(mdp->d_path, (const char *)cp, clen, NULL); 1083 else if (best) 1084 result = file_lookup(mdp->d_path, (const char *)best, blen, NULL); 1085 bad: 1086 /* 1087 * If nothing found or hints is absent - fallback to the old way 1088 * by using "kldname[.ko]" as module name. 1089 */ 1090 if (!found && !bestver && result == NULL) 1091 result = file_lookup(mdp->d_path, modname, modnamelen, kld_ext_list); 1092 return result; 1093 } 1094 1095 static int 1096 getint(void **ptr) 1097 { 1098 int *p = *ptr; 1099 int rv; 1100 1101 p = (int *)roundup2((intptr_t)p, sizeof(int)); 1102 rv = *p++; 1103 *ptr = p; 1104 return rv; 1105 } 1106 1107 static void 1108 getstr(void **ptr, char *val) 1109 { 1110 int *p = *ptr; 1111 char *c = (char *)p; 1112 int len = *(uint8_t *)c; 1113 1114 memcpy(val, c + 1, len); 1115 val[len] = 0; 1116 c += len + 1; 1117 *ptr = (void *)c; 1118 } 1119 1120 static int 1121 pnpval_as_int(const char *val, const char *pnpinfo) 1122 { 1123 int rv; 1124 char key[256]; 1125 char *cp; 1126 1127 if (pnpinfo == NULL) 1128 return -1; 1129 1130 cp = strchr(val, ';'); 1131 key[0] = ' '; 1132 if (cp == NULL) 1133 strlcpy(key + 1, val, sizeof(key) - 1); 1134 else { 1135 memcpy(key + 1, val, cp - val); 1136 key[cp - val + 1] = '\0'; 1137 } 1138 strlcat(key, "=", sizeof(key)); 1139 if (strncmp(key + 1, pnpinfo, strlen(key + 1)) == 0) 1140 rv = strtol(pnpinfo + strlen(key + 1), NULL, 0); 1141 else { 1142 cp = strstr(pnpinfo, key); 1143 if (cp == NULL) 1144 rv = -1; 1145 else 1146 rv = strtol(cp + strlen(key), NULL, 0); 1147 } 1148 return rv; 1149 } 1150 1151 static void 1152 quoted_strcpy(char *dst, const char *src) 1153 { 1154 char q = ' '; 1155 1156 if (*src == '\'' || *src == '"') 1157 q = *src++; 1158 while (*src && *src != q) 1159 *dst++ = *src++; // XXX backtick quoting 1160 *dst++ = '\0'; 1161 // XXX overflow 1162 } 1163 1164 static char * 1165 pnpval_as_str(const char *val, const char *pnpinfo) 1166 { 1167 static char retval[256]; 1168 char key[256]; 1169 char *cp; 1170 1171 if (pnpinfo == NULL) { 1172 *retval = '\0'; 1173 return retval; 1174 } 1175 1176 cp = strchr(val, ';'); 1177 key[0] = ' '; 1178 if (cp == NULL) 1179 strlcpy(key + 1, val, sizeof(key) - 1); 1180 else { 1181 memcpy(key + 1, val, cp - val); 1182 key[cp - val + 1] = '\0'; 1183 } 1184 strlcat(key, "=", sizeof(key)); 1185 if (strncmp(key + 1, pnpinfo, strlen(key + 1)) == 0) 1186 quoted_strcpy(retval, pnpinfo + strlen(key + 1)); 1187 else { 1188 cp = strstr(pnpinfo, key); 1189 if (cp == NULL) 1190 strcpy(retval, "MISSING"); 1191 else 1192 quoted_strcpy(retval, cp + strlen(key)); 1193 } 1194 return retval; 1195 } 1196 1197 static char * 1198 devmatch_search_hints(struct moduledir *mdp, const char *bus, const char *dev, const char *pnpinfo) 1199 { 1200 char val1[256], val2[256]; 1201 int ival, len, ents, i, notme, mask, bit, v, found; 1202 void *ptr, *walker, *hints_end; 1203 char *lastmod = NULL, *cp, *s; 1204 1205 moduledir_readhints(mdp); 1206 found = 0; 1207 if (mdp->d_hints == NULL) 1208 goto bad; 1209 walker = mdp->d_hints; 1210 hints_end = walker + mdp->d_hintsz; 1211 while (walker < hints_end && !found) { 1212 len = getint(&walker); 1213 ival = getint(&walker); 1214 ptr = walker; 1215 switch (ival) { 1216 case MDT_VERSION: 1217 getstr(&ptr, val1); 1218 ival = getint(&ptr); 1219 getstr(&ptr, val2); 1220 if (pnp_dump_flag || pnp_verbose_flag) 1221 printf("Version: if %s.%d kmod %s\n", val1, ival, val2); 1222 break; 1223 case MDT_MODULE: 1224 getstr(&ptr, val1); 1225 getstr(&ptr, val2); 1226 if (lastmod) 1227 free(lastmod); 1228 lastmod = strdup(val2); 1229 if (pnp_dump_flag || pnp_verbose_flag) 1230 printf("module %s in %s\n", val1, val1); 1231 break; 1232 case MDT_PNP_INFO: 1233 if (!pnp_dump_flag && !pnp_unbound_flag && lastmod && strcmp(lastmod, "kernel") == 0) 1234 break; 1235 getstr(&ptr, val1); 1236 getstr(&ptr, val2); 1237 ents = getint(&ptr); 1238 if (pnp_dump_flag || pnp_verbose_flag) 1239 printf("PNP info for bus %s format %s %d entries (%s)\n", 1240 val1, val2, ents, lastmod); 1241 if (strcmp(val1, "usb") == 0) { 1242 if (pnp_verbose_flag) 1243 printf("Treating usb as uhub -- bug in source table still?\n"); 1244 strcpy(val1, "uhub"); 1245 } 1246 if (bus && strcmp(val1, bus) != 0) { 1247 if (pnp_verbose_flag) 1248 printf("Skipped because table for bus %s, looking for %s\n", 1249 val1, bus); 1250 break; 1251 } 1252 for (i = 0; i < ents; i++) { 1253 if (pnp_verbose_flag) 1254 printf("---------- Entry %d ----------\n", i); 1255 if (pnp_dump_flag) 1256 printf(" "); 1257 cp = val2; 1258 notme = 0; 1259 mask = -1; 1260 bit = -1; 1261 do { 1262 switch (*cp) { 1263 /* All integer fields */ 1264 case 'I': 1265 case 'J': 1266 case 'G': 1267 case 'L': 1268 case 'M': 1269 ival = getint(&ptr); 1270 if (pnp_dump_flag) { 1271 printf("%#x:", ival); 1272 break; 1273 } 1274 if (bit >= 0 && ((1 << bit) & mask) == 0) 1275 break; 1276 v = pnpval_as_int(cp + 2, pnpinfo); 1277 if (pnp_verbose_flag) 1278 printf("Matching %s (%c) table=%#x tomatch=%#x\n", 1279 cp + 2, *cp, v, ival); 1280 switch (*cp) { 1281 case 'J': 1282 if (ival == -1) 1283 break; 1284 /*FALLTHROUGH*/ 1285 case 'I': 1286 if (v != ival) 1287 notme++; 1288 break; 1289 case 'G': 1290 if (v < ival) 1291 notme++; 1292 break; 1293 case 'L': 1294 if (v > ival) 1295 notme++; 1296 break; 1297 case 'M': 1298 mask = ival; 1299 break; 1300 } 1301 break; 1302 /* String fields */ 1303 case 'D': 1304 case 'Z': 1305 getstr(&ptr, val1); 1306 if (pnp_dump_flag) { 1307 printf("'%s':", val1); 1308 break; 1309 } 1310 if (*cp == 'D') 1311 break; 1312 s = pnpval_as_str(cp + 2, pnpinfo); 1313 if (strcmp(s, val1) != 0) 1314 notme++; 1315 break; 1316 /* Key override fields, required to be last in the string */ 1317 case 'T': 1318 /* 1319 * This is imperfect and only does one key and will be redone 1320 * to be more general for multiple keys. Currently, nothing 1321 * does that. 1322 */ 1323 if (pnp_dump_flag) /* No per-row data stored */ 1324 break; 1325 if (cp[strlen(cp) - 1] == ';') /* Skip required ; at end */ 1326 cp[strlen(cp) - 1] = '\0'; /* in case it's not there */ 1327 if ((s = strstr(pnpinfo, cp + 2)) == NULL) 1328 notme++; 1329 else if (s > pnpinfo && s[-1] != ' ') 1330 notme++; 1331 break; 1332 default: 1333 printf("Unknown field type %c\n:", *cp); 1334 break; 1335 } 1336 bit++; 1337 cp = strchr(cp, ';'); 1338 if (cp) 1339 cp++; 1340 } while (cp && *cp); 1341 if (pnp_dump_flag) 1342 printf("\n"); 1343 else if (!notme) { 1344 if (!pnp_unbound_flag) { 1345 if (pnp_verbose_flag) 1346 printf("Matches --- %s ---\n", lastmod); 1347 } 1348 found++; 1349 } 1350 } 1351 break; 1352 default: 1353 break; 1354 } 1355 walker = (void *)(len - sizeof(int) + (intptr_t)walker); 1356 } 1357 if (pnp_unbound_flag && found == 0 && *pnpinfo) { 1358 if (pnp_verbose_flag) 1359 printf("------------------------- "); 1360 printf("%s on %s pnpinfo %s", *dev ? dev : "unattached", bus, pnpinfo); 1361 if (pnp_verbose_flag) 1362 printf(" -------------------------"); 1363 printf("\n"); 1364 } 1365 if (found != 0) 1366 return (lastmod); 1367 free(lastmod); 1368 1369 bad: 1370 return (NULL); 1371 } 1372 1373 /* 1374 * Attempt to locate the file containing the module (name) 1375 */ 1376 static char * 1377 mod_searchmodule(char *name, struct mod_depend *verinfo) 1378 { 1379 struct moduledir *mdp; 1380 char *result; 1381 1382 moduledir_rebuild(); 1383 /* 1384 * Now we ready to lookup module in the given directories 1385 */ 1386 result = NULL; 1387 STAILQ_FOREACH(mdp, &moduledir_list, d_link) { 1388 result = mod_search_hints(mdp, name, verinfo); 1389 if (result) 1390 break; 1391 } 1392 1393 return(result); 1394 } 1395 1396 static char * 1397 mod_searchmodule_pnpinfo(const char *bus, const char *pnpinfo) 1398 { 1399 struct moduledir *mdp; 1400 char *result; 1401 1402 moduledir_rebuild(); 1403 /* 1404 * Now we ready to lookup module in the given directories 1405 */ 1406 result = NULL; 1407 STAILQ_FOREACH(mdp, &moduledir_list, d_link) { 1408 result = devmatch_search_hints(mdp, bus, NULL, pnpinfo); 1409 if (result) 1410 break; 1411 } 1412 1413 return(result); 1414 } 1415 1416 int 1417 file_addmodule(struct preloaded_file *fp, char *modname, int version, 1418 struct kernel_module **newmp) 1419 { 1420 struct kernel_module *mp; 1421 struct mod_depend mdepend; 1422 1423 bzero(&mdepend, sizeof(mdepend)); 1424 mdepend.md_ver_preferred = version; 1425 mp = file_findmodule(fp, modname, &mdepend); 1426 if (mp) 1427 return (EEXIST); 1428 mp = calloc(1, sizeof(struct kernel_module)); 1429 if (mp == NULL) 1430 return (ENOMEM); 1431 mp->m_name = strdup(modname); 1432 if (mp->m_name == NULL) { 1433 free(mp); 1434 return (ENOMEM); 1435 } 1436 mp->m_version = version; 1437 mp->m_fp = fp; 1438 mp->m_next = fp->f_modules; 1439 fp->f_modules = mp; 1440 if (newmp) 1441 *newmp = mp; 1442 return (0); 1443 } 1444 1445 /* 1446 * Throw a file away 1447 */ 1448 void 1449 file_discard(struct preloaded_file *fp) 1450 { 1451 struct file_metadata *md, *md1; 1452 struct kernel_module *mp, *mp1; 1453 if (fp == NULL) 1454 return; 1455 md = fp->f_metadata; 1456 while (md) { 1457 md1 = md; 1458 md = md->md_next; 1459 free(md1); 1460 } 1461 mp = fp->f_modules; 1462 while (mp) { 1463 free(mp->m_name); 1464 mp1 = mp; 1465 mp = mp->m_next; 1466 free(mp1); 1467 } 1468 free(fp->f_name); 1469 free(fp->f_type); 1470 free(fp->f_args); 1471 free(fp); 1472 } 1473 1474 /* 1475 * Allocate a new file; must be used instead of malloc() 1476 * to ensure safe initialisation. 1477 */ 1478 struct preloaded_file * 1479 file_alloc(void) 1480 { 1481 1482 return (calloc(1, sizeof(struct preloaded_file))); 1483 } 1484 1485 /* 1486 * Add a module to the chain 1487 */ 1488 static void 1489 file_insert_tail(struct preloaded_file *fp) 1490 { 1491 struct preloaded_file *cm; 1492 1493 /* Append to list of loaded file */ 1494 fp->f_next = NULL; 1495 if (preloaded_files == NULL) { 1496 preloaded_files = fp; 1497 } else { 1498 for (cm = preloaded_files; cm->f_next != NULL; cm = cm->f_next) 1499 ; 1500 cm->f_next = fp; 1501 } 1502 } 1503 1504 /* 1505 * Remove module from the chain 1506 */ 1507 static void 1508 file_remove(struct preloaded_file *fp) 1509 { 1510 struct preloaded_file *cm; 1511 1512 if (preloaded_files == NULL) 1513 return; 1514 1515 if (preloaded_files == fp) { 1516 preloaded_files = fp->f_next; 1517 return; 1518 } 1519 for (cm = preloaded_files; cm->f_next != NULL; cm = cm->f_next) { 1520 if (cm->f_next == fp) { 1521 cm->f_next = fp->f_next; 1522 return; 1523 } 1524 } 1525 } 1526 1527 static char * 1528 moduledir_fullpath(struct moduledir *mdp, const char *fname) 1529 { 1530 char *cp; 1531 1532 cp = malloc(strlen(mdp->d_path) + strlen(fname) + 2); 1533 if (cp == NULL) 1534 return NULL; 1535 strcpy(cp, mdp->d_path); 1536 strcat(cp, "/"); 1537 strcat(cp, fname); 1538 return (cp); 1539 } 1540 1541 /* 1542 * Read linker.hints file into memory performing some sanity checks. 1543 */ 1544 static void 1545 moduledir_readhints(struct moduledir *mdp) 1546 { 1547 struct stat st; 1548 char *path; 1549 int fd, size, version; 1550 1551 if (mdp->d_hints != NULL || (mdp->d_flags & MDIR_NOHINTS)) 1552 return; 1553 path = moduledir_fullpath(mdp, "linker.hints"); 1554 if (stat(path, &st) != 0 || 1555 st.st_size < (ssize_t)(sizeof(version) + sizeof(int)) || 1556 st.st_size > LINKER_HINTS_MAX || (fd = open(path, O_RDONLY)) < 0) { 1557 free(path); 1558 mdp->d_flags |= MDIR_NOHINTS; 1559 return; 1560 } 1561 free(path); 1562 size = read(fd, &version, sizeof(version)); 1563 if (size != sizeof(version) || version != LINKER_HINTS_VERSION) 1564 goto bad; 1565 size = st.st_size - size; 1566 mdp->d_hints = malloc(size); 1567 if (mdp->d_hints == NULL) 1568 goto bad; 1569 if (read(fd, mdp->d_hints, size) != size) 1570 goto bad; 1571 mdp->d_hintsz = size; 1572 close(fd); 1573 return; 1574 bad: 1575 close(fd); 1576 free(mdp->d_hints); 1577 mdp->d_hints = NULL; 1578 mdp->d_flags |= MDIR_NOHINTS; 1579 return; 1580 } 1581 1582 /* 1583 * Extract directories from the ';' separated list, remove duplicates. 1584 */ 1585 static void 1586 moduledir_rebuild(void) 1587 { 1588 struct moduledir *mdp, *mtmp; 1589 const char *path, *cp, *ep; 1590 size_t cplen; 1591 1592 path = getenv("module_path"); 1593 if (path == NULL) 1594 path = default_searchpath; 1595 /* 1596 * Rebuild list of module directories if it changed 1597 */ 1598 STAILQ_FOREACH(mdp, &moduledir_list, d_link) 1599 mdp->d_flags |= MDIR_REMOVED; 1600 1601 for (ep = path; *ep != 0; ep++) { 1602 cp = ep; 1603 for (; *ep != 0 && *ep != ';'; ep++) 1604 ; 1605 /* 1606 * Ignore trailing slashes 1607 */ 1608 for (cplen = ep - cp; cplen > 1 && cp[cplen - 1] == '/'; cplen--) 1609 ; 1610 STAILQ_FOREACH(mdp, &moduledir_list, d_link) { 1611 if (strlen(mdp->d_path) != cplen || bcmp(cp, mdp->d_path, cplen) != 0) 1612 continue; 1613 mdp->d_flags &= ~MDIR_REMOVED; 1614 break; 1615 } 1616 if (mdp == NULL) { 1617 mdp = malloc(sizeof(*mdp) + cplen + 1); 1618 if (mdp == NULL) 1619 return; 1620 mdp->d_path = (char*)(mdp + 1); 1621 bcopy(cp, mdp->d_path, cplen); 1622 mdp->d_path[cplen] = 0; 1623 mdp->d_hints = NULL; 1624 mdp->d_flags = 0; 1625 STAILQ_INSERT_TAIL(&moduledir_list, mdp, d_link); 1626 } 1627 if (*ep == 0) 1628 break; 1629 } 1630 /* 1631 * Delete unused directories if any 1632 */ 1633 mdp = STAILQ_FIRST(&moduledir_list); 1634 while (mdp) { 1635 if ((mdp->d_flags & MDIR_REMOVED) == 0) { 1636 mdp = STAILQ_NEXT(mdp, d_link); 1637 } else { 1638 free(mdp->d_hints); 1639 mtmp = mdp; 1640 mdp = STAILQ_NEXT(mdp, d_link); 1641 STAILQ_REMOVE(&moduledir_list, mtmp, moduledir, d_link); 1642 free(mtmp); 1643 } 1644 } 1645 return; 1646 } 1647