42 * 43 */ 44 45/* 46 * Analyze filesystem declarations 47 * 48 * Note: most of this is magic! 49 */ 50 51#ifdef HAVE_CONFIG_H 52# include <config.h> 53#endif /* HAVE_CONFIG_H */ 54#include <am_defs.h> 55#include <fsi_data.h> 56#include <fsinfo.h> 57 58char *disk_fs_strings[] = 59{ 60 "fstype", "opts", "dumpset", "passno", "freq", "mount", "log", 0, 61}; 62 63char *mount_strings[] = 64{ 65 "volname", "exportfs", 0, 66}; 67 68char *fsmount_strings[] = 69{ 70 "as", "volname", "fstype", "opts", "from", 0, 71}; 72 73char *host_strings[] = 74{ 75 "host", "netif", "config", "arch", "cluster", "os", 0, 76}; 77 78char *ether_if_strings[] = 79{ 80 "inaddr", "netmask", "hwaddr", 0, 81}; 82 83 84/* 85 * Strip off the trailing part of a domain 86 * to produce a short-form domain relative 87 * to the local host domain. 88 * Note that this has no effect if the domain 89 * names do not have the same number of 90 * components. If that restriction proves 91 * to be a problem then the loop needs recoding 92 * to skip from right to left and do partial 93 * matches along the way -- ie more expensive. 94 */ 95void 96domain_strip(char *otherdom, char *localdom) 97{ 98 char *p1, *p2; 99 100 if ((p1 = strchr(otherdom, '.')) && 101 (p2 = strchr(localdom, '.')) && 102 STREQ(p1 + 1, p2 + 1)) 103 *p1 = '\0'; 104} 105 106 107/* 108 * Take a little-endian domain name and 109 * transform into a big-endian Un*x pathname. 110 * For example: kiska.doc.ic -> ic/doc/kiska 111 */ 112static char * 113compute_hostpath(char *hn) 114{ 115 char *p = strdup(hn); 116 char *d; 117 char path[MAXPATHLEN]; 118 119 domain_strip(p, hostname); 120 path[0] = '\0'; 121 122 do { 123 d = strrchr(p, '.'); 124 if (d) { 125 *d = 0; 126 strcat(path, d + 1); 127 strcat(path, "/"); 128 } else { 129 strcat(path, p); 130 } 131 } while (d); 132 133 log("hostpath of '%s' is '%s'", hn, path); 134 135 strcpy(p, path); 136 return p; 137} 138 139 140static dict_ent * 141find_volname(char *nn) 142{ 143 dict_ent *de; 144 char *p = strdup(nn); 145 char *q; 146 147 do { 148 log("Searching for volname %s", p); 149 de = dict_locate(dict_of_volnames, p); 150 q = strrchr(p, '/'); 151 if (q) 152 *q = '\0'; 153 } while (!de && q); 154 155 XFREE(p); 156 return de; 157} 158 159 160static void 161show_required(ioloc *l, int mask, char *info, char *hostname, char *strings[]) 162{ 163 int i; 164 log("mask left for %s:%s is %#x", hostname, info, mask); 165 166 for (i = 0; strings[i]; i++) 167 if (ISSET(mask, i)) 168 lerror(l, "%s:%s needs field \"%s\"", hostname, info, strings[i]); 169} 170 171 172/* 173 * Check and fill in "exportfs" details. 174 * Make sure the m_exported field references 175 * the most local node with an "exportfs" entry. 176 */ 177static int 178check_exportfs(qelem *q, fsi_mount *e) 179{ 180 fsi_mount *mp; 181 int errors = 0; 182 183 ITER(mp, fsi_mount, q) { 184 if (ISSET(mp->m_mask, DM_EXPORTFS)) { 185 if (e) 186 lwarning(mp->m_ioloc, "%s has duplicate exportfs data", mp->m_name); 187 mp->m_exported = mp; 188 if (!ISSET(mp->m_mask, DM_VOLNAME)) 189 set_mount(mp, DM_VOLNAME, strdup(mp->m_name)); 190 } else { 191 mp->m_exported = e; 192 } 193 194 /* 195 * Recursively descend the mount tree 196 */ 197 if (mp->m_mount) 198 errors += check_exportfs(mp->m_mount, mp->m_exported); 199 200 /* 201 * If a volume name has been specified, but this node and none 202 * of its parents has been exported, report an error. 203 */ 204 if (ISSET(mp->m_mask, DM_VOLNAME) && !mp->m_exported) { 205 lerror(mp->m_ioloc, "%s has a volname but no exportfs data", mp->m_name); 206 errors++; 207 } 208 } 209 210 return errors; 211} 212 213 214static int 215analyze_dkmount_tree(qelem *q, fsi_mount *parent, disk_fs *dk) 216{ 217 fsi_mount *mp; 218 int errors = 0; 219 220 ITER(mp, fsi_mount, q) { 221 log("Mount %s:", mp->m_name); 222 if (parent) { 223 char n[MAXPATHLEN]; 224 sprintf(n, "%s/%s", parent->m_name, mp->m_name); 225 if (*mp->m_name == '/') 226 lerror(mp->m_ioloc, "sub-directory %s of %s starts with '/'", mp->m_name, parent->m_name); 227 else if (STREQ(mp->m_name, "default")) 228 lwarning(mp->m_ioloc, "sub-directory of %s is named \"default\"", parent->m_name); 229 log("Changing name %s to %s", mp->m_name, n); 230 XFREE(mp->m_name); 231 mp->m_name = strdup(n); 232 } 233 234 mp->m_name_len = strlen(mp->m_name); 235 mp->m_parent = parent; 236 mp->m_dk = dk; 237 if (mp->m_mount) 238 analyze_dkmount_tree(mp->m_mount, mp, dk); 239 } 240 241 return errors; 242} 243 244 245/* 246 * The mount tree is a singleton list 247 * containing the top-level mount 248 * point for a disk. 249 */ 250static int 251analyze_dkmounts(disk_fs *dk, qelem *q) 252{ 253 int errors = 0; 254 fsi_mount *mp, *mp2 = 0; 255 int i = 0; 256 257 /* 258 * First scan the list of subdirs to make 259 * sure there is only one - and remember it 260 */ 261 if (q) { 262 ITER(mp, fsi_mount, q) { 263 mp2 = mp; 264 i++; 265 } 266 } 267 268 /* 269 * Check... 270 */ 271 if (i < 1) { 272 lerror(dk->d_ioloc, "%s:%s has no mount point", dk->d_host->h_hostname, dk->d_dev); 273 return 1; 274 } 275 276 if (i > 1) { 277 lerror(dk->d_ioloc, "%s:%s has more than one mount point", dk->d_host->h_hostname, dk->d_dev); 278 errors++; 279 } 280 281 /* 282 * Now see if a default mount point is required 283 */ 284 if (STREQ(mp2->m_name, "default")) { 285 if (ISSET(mp2->m_mask, DM_VOLNAME)) { 286 char nbuf[1024]; 287 compute_automount_point(nbuf, dk->d_host, mp2->m_volname); 288 XFREE(mp2->m_name); 289 mp2->m_name = strdup(nbuf); 290 log("%s:%s has default mount on %s", dk->d_host->h_hostname, dk->d_dev, mp2->m_name); 291 } else { 292 lerror(dk->d_ioloc, "no volname given for %s:%s", dk->d_host->h_hostname, dk->d_dev); 293 errors++; 294 } 295 } 296 297 /* 298 * Fill in the disk mount point 299 */ 300 if (!errors && mp2 && mp2->m_name) 301 dk->d_mountpt = strdup(mp2->m_name); 302 else 303 dk->d_mountpt = strdup("error"); 304 305 /* 306 * Analyze the mount tree 307 */ 308 errors += analyze_dkmount_tree(q, 0, dk); 309 310 /* 311 * Analyze the export tree 312 */ 313 errors += check_exportfs(q, 0); 314 315 return errors; 316} 317 318 319static void 320fixup_required_disk_info(disk_fs *dp) 321{ 322 /* 323 * "fstype" 324 */ 325 if (ISSET(dp->d_mask, DF_FSTYPE)) { 326 if (STREQ(dp->d_fstype, "swap")) { 327 328 /* 329 * Fixup for a swap device 330 */ 331 if (!ISSET(dp->d_mask, DF_PASSNO)) { 332 dp->d_passno = 0; 333 BITSET(dp->d_mask, DF_PASSNO); 334 } else if (dp->d_freq != 0) { 335 lwarning(dp->d_ioloc, 336 "Pass number for %s:%s is non-zero", 337 dp->d_host->h_hostname, dp->d_dev); 338 } 339 340 /* 341 * "freq" 342 */ 343 if (!ISSET(dp->d_mask, DF_FREQ)) { 344 dp->d_freq = 0; 345 BITSET(dp->d_mask, DF_FREQ); 346 } else if (dp->d_freq != 0) { 347 lwarning(dp->d_ioloc, 348 "dump frequency for %s:%s is non-zero", 349 dp->d_host->h_hostname, dp->d_dev); 350 } 351 352 /* 353 * "opts" 354 */ 355 if (!ISSET(dp->d_mask, DF_OPTS)) 356 set_disk_fs(dp, DF_OPTS, strdup("swap")); 357 358 /* 359 * "mount" 360 */ 361 if (!ISSET(dp->d_mask, DF_MOUNT)) { 362 qelem *q = new_que(); 363 fsi_mount *m = new_mount(); 364 365 m->m_name = strdup("swap"); 366 m->m_mount = new_que(); 367 ins_que(&m->m_q, q->q_back); 368 dp->d_mount = q; 369 BITSET(dp->d_mask, DF_MOUNT); 370 } else { 371 lerror(dp->d_ioloc, "%s: mount field specified for swap partition", dp->d_host->h_hostname); 372 } 373 } else if (STREQ(dp->d_fstype, "export")) { 374 375 /* 376 * "passno" 377 */ 378 if (!ISSET(dp->d_mask, DF_PASSNO)) { 379 dp->d_passno = 0; 380 BITSET(dp->d_mask, DF_PASSNO); 381 } else if (dp->d_passno != 0) { 382 lwarning(dp->d_ioloc, 383 "pass number for %s:%s is non-zero", 384 dp->d_host->h_hostname, dp->d_dev); 385 } 386 387 /* 388 * "freq" 389 */ 390 if (!ISSET(dp->d_mask, DF_FREQ)) { 391 dp->d_freq = 0; 392 BITSET(dp->d_mask, DF_FREQ); 393 } else if (dp->d_freq != 0) { 394 lwarning(dp->d_ioloc, 395 "dump frequency for %s:%s is non-zero", 396 dp->d_host->h_hostname, dp->d_dev); 397 } 398 399 /* 400 * "opts" 401 */ 402 if (!ISSET(dp->d_mask, DF_OPTS)) 403 set_disk_fs(dp, DF_OPTS, strdup("rw,defaults")); 404 405 } 406 } 407} 408 409 410static void 411fixup_required_mount_info(fsmount *fp, dict_ent *de) 412{ 413 if (!ISSET(fp->f_mask, FM_FROM)) { 414 if (de->de_count != 1) { 415 lerror(fp->f_ioloc, "ambiguous mount: %s is a replicated filesystem", fp->f_volname); 416 } else { 417 dict_data *dd; 418 fsi_mount *mp = 0; 419 dd = AM_FIRST(dict_data, &de->de_q); 420 mp = (fsi_mount *) dd->dd_data; 421 if (!mp) 422 abort(); 423 fp->f_ref = mp; 424 set_fsmount(fp, FM_FROM, mp->m_dk->d_host->h_hostname); 425 log("set: %s comes from %s", fp->f_volname, fp->f_from); 426 } 427 } 428 429 if (!ISSET(fp->f_mask, FM_FSTYPE)) { 430 set_fsmount(fp, FM_FSTYPE, strdup("nfs")); 431 log("set: fstype is %s", fp->f_fstype); 432 } 433 434 if (!ISSET(fp->f_mask, FM_OPTS)) { 435 set_fsmount(fp, FM_OPTS, strdup("rw,nosuid,grpid,defaults")); 436 log("set: opts are %s", fp->f_opts); 437 } 438 439 if (!ISSET(fp->f_mask, FM_LOCALNAME)) { 440 if (fp->f_ref) { 441 set_fsmount(fp, FM_LOCALNAME, strdup(fp->f_volname)); 442 log("set: localname is %s", fp->f_localname); 443 } else { 444 lerror(fp->f_ioloc, "cannot determine localname since volname %s is not uniquely defined", fp->f_volname); 445 } 446 } 447} 448 449 450/* 451 * For each disk on a host 452 * analyze the mount information 453 * and fill in any derivable 454 * details. 455 */ 456static void 457analyze_drives(host *hp) 458{ 459 qelem *q = hp->h_disk_fs; 460 disk_fs *dp; 461 462 ITER(dp, disk_fs, q) { 463 int req; 464 log("Disk %s:", dp->d_dev); 465 dp->d_host = hp; 466 fixup_required_disk_info(dp); 467 req = ~dp->d_mask & DF_REQUIRED; 468 if (req) 469 show_required(dp->d_ioloc, req, dp->d_dev, hp->h_hostname, disk_fs_strings); 470 analyze_dkmounts(dp, dp->d_mount); 471 } 472} 473 474 475/* 476 * Check that all static mounts make sense and 477 * that the source volumes exist. 478 */ 479static void 480analyze_mounts(host *hp) 481{ 482 qelem *q = hp->h_mount; 483 fsmount *fp; 484 int netbootp = 0; 485 486 ITER(fp, fsmount, q) { 487 char *p; 488 char *nn = strdup(fp->f_volname); 489 int req; 490 dict_ent *de = (dict_ent *) NULL; 491 int found = 0; 492 int matched = 0; 493 494 if (ISSET(fp->f_mask, FM_DIRECT)) { 495 found = 1; 496 matched = 1; 497 } else 498 do { 499 p = 0; 500 de = find_volname(nn); 501 log("Mount: %s (trying %s)", fp->f_volname, nn); 502 503 if (de) { 504 found = 1; 505 506 /* 507 * Check that the from field is really exporting 508 * the filesystem requested. 509 * LBL: If fake mount, then don't care about 510 * consistency check. 511 */ 512 if (ISSET(fp->f_mask, FM_FROM) && !ISSET(fp->f_mask, FM_DIRECT)) { 513 dict_data *dd; 514 fsi_mount *mp2 = 0; 515 516 ITER(dd, dict_data, &de->de_q) { 517 fsi_mount *mp = (fsi_mount *) dd->dd_data; 518 519 if (STREQ(mp->m_dk->d_host->h_hostname, fp->f_from)) { 520 mp2 = mp; 521 break; 522 } 523 } 524 525 if (mp2) { 526 fp->f_ref = mp2; 527 matched = 1; 528 break; 529 } 530 } else { 531 matched = 1; 532 break; 533 } 534 } 535 p = strrchr(nn, '/'); 536 if (p) 537 *p = 0; 538 } while (de && p); 539 XFREE(nn); 540 541 if (!found) { 542 lerror(fp->f_ioloc, "volname %s unknown", fp->f_volname); 543 } else if (matched) { 544 545 fixup_required_mount_info(fp, de); 546 req = ~fp->f_mask & FM_REQUIRED; 547 if (req) { 548 show_required(fp->f_ioloc, req, fp->f_volname, hp->h_hostname, 549 fsmount_strings); 550 } else if (STREQ(fp->f_localname, "/")) { 551 hp->h_netroot = fp; 552 netbootp |= FM_NETROOT; 553 } else if (STREQ(fp->f_localname, "swap")) { 554 hp->h_netswap = fp; 555 netbootp |= FM_NETSWAP; 556 } 557 558 } else { 559 lerror(fp->f_ioloc, "volname %s not exported from %s", fp->f_volname, 560 fp->f_from ? fp->f_from : "anywhere"); 561 } 562 } 563 564 if (netbootp && (netbootp != FM_NETBOOT)) 565 lerror(hp->h_ioloc, "network booting requires both root and swap areas"); 566} 567 568 569void 570analyze_hosts(qelem *q) 571{ 572 host *hp; 573 574 show_area_being_processed("analyze hosts", 5); 575 576 /* 577 * Check all drives 578 */ 579 ITER(hp, host, q) { 580 log("disks on host %s", hp->h_hostname); 581 show_new("ana-host"); 582 hp->h_hostpath = compute_hostpath(hp->h_hostname); 583 584 if (hp->h_disk_fs) 585 analyze_drives(hp); 586 587 } 588 589 show_area_being_processed("analyze mounts", 5); 590 591 /* 592 * Check static mounts 593 */ 594 ITER(hp, host, q) { 595 log("mounts on host %s", hp->h_hostname); 596 show_new("ana-mount"); 597 if (hp->h_mount) 598 analyze_mounts(hp); 599 600 } 601} 602 603 604/* 605 * Check an automount request 606 */ 607static void 608analyze_automount(automount *ap) 609{ 610 dict_ent *de = find_volname(ap->a_volname); 611 612 if (de) { 613 ap->a_mounted = de; 614 } else { 615 if (STREQ(ap->a_volname, ap->a_name)) 616 lerror(ap->a_ioloc, "unknown volname %s automounted", ap->a_volname); 617 else 618 lerror(ap->a_ioloc, "unknown volname %s automounted on %s", ap->a_volname, ap->a_name); 619 } 620} 621 622 623static void 624analyze_automount_tree(qelem *q, char *pref, int lvl) 625{ 626 automount *ap; 627 628 ITER(ap, automount, q) { 629 char nname[1024]; 630 631 if (lvl > 0 || ap->a_mount) 632 if (ap->a_name[1] && strchr(ap->a_name + 1, '/')) 633 lerror(ap->a_ioloc, "not allowed '/' in a directory name"); 634 sprintf(nname, "%s/%s", pref, ap->a_name); 635 XFREE(ap->a_name); 636 ap->a_name = strdup(nname[1] == '/' ? nname + 1 : nname); 637 log("automount point %s:", ap->a_name); 638 show_new("ana-automount"); 639 640 if (ap->a_mount) { 641 analyze_automount_tree(ap->a_mount, ap->a_name, lvl + 1); 642 } else if (ap->a_hardwiredfs) { 643 log("\thardwired from %s to %s", ap->a_volname, ap->a_hardwiredfs); 644 } else if (ap->a_volname) { 645 log("\tautomount from %s", ap->a_volname); 646 analyze_automount(ap); 647 } else if (ap->a_symlink) { 648 log("\tsymlink to %s", ap->a_symlink); 649 } else { 650 ap->a_volname = strdup(ap->a_name); 651 log("\timplicit automount from %s", ap->a_volname); 652 analyze_automount(ap); 653 } 654 } 655} 656 657 658void 659analyze_automounts(qelem *q) 660{ 661 auto_tree *tp; 662 663 show_area_being_processed("analyze automount", 5); 664 665 /* 666 * q is a list of automounts 667 */ 668 ITER(tp, auto_tree, q) 669 analyze_automount_tree(tp->t_mount, "", 0); 670}
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