config.c

   1 /*
   2  * mdadm - manage Linux "md" devices aka RAID arrays.
   3  *
   4  * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
   5  *
   6  *
   7  *    This program is free software; you can redistribute it and/or modify
   8  *    it under the terms of the GNU General Public License as published by
   9  *    the Free Software Foundation; either version 2 of the License, or
  10  *    (at your option) any later version.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *    GNU General Public License for more details.
  16  *
  17  *    You should have received a copy of the GNU General Public License
  18  *    along with this program; if not, write to the Free Software
  19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  *
  21  *    Author: Neil Brown
  22  *    Email: <neilb@suse.de>
  23  */
  24
  25 #include        "mdadm.h"
  26 #include        "dlink.h"
  27 #include        <dirent.h>
  28 #include        <glob.h>
  29 #include        <fnmatch.h>
  30 #include        <ctype.h>
  31 #include        <pwd.h>
  32 #include        <grp.h>
  33
  34 /*
  35  * Read the config file
  36  *
  37  * conf_get_uuids gets a list of devicename+uuid pairs
  38  * conf_get_devs gets device names after expanding wildcards
  39  *
  40  * Each keeps the returned list and frees it when asked to make
  41  * a new list.
  42  *
  43  * The format of the config file needs to be fairly extensible.
  44  * Now, arrays only have names and uuids and devices merely are.
  45  * But later arrays might want names, and devices might want superblock
  46  * versions, and who knows what else.
  47  * I like free format, abhore backslash line continuation, adore
  48  *   indentation for structure and am ok about # comments.
  49  *
  50  * So, each line that isn't blank or a #comment must either start
  51  *  with a key word, and not be indented, or must start with a
  52  *  non-key-word and must be indented.
  53  *
  54  * Keywords are DEVICE and ARRAY ... and several others.
  55  * DEV{ICE} introduces some devices that might contain raid components.
  56  * e.g.
  57  *   DEV style=0 /dev/sda* /dev/hd*
  58  *   DEV style=1 /dev/sd[b-f]*
  59  * ARR{AY} describes an array giving md device and attributes like uuid=whatever
  60  * e.g.
  61  *   ARRAY /dev/md0 uuid=whatever name=something
  62  * Spaces separate words on each line.  Quoting, with "" or '' protects them,
  63  * but may not wrap over lines
  64  *
  65  */
  66
  67 #ifndef CONFFILE
  68 #define CONFFILE "/etc/mdadm.conf"
  69 #endif
  70 #ifndef CONFFILE2
  71 /* for Debian compatibility .... */
  72 #define CONFFILE2 "/etc/mdadm/mdadm.conf"
  73 #endif
  74 char DefaultConfFile[] = CONFFILE;
  75 char DefaultAltConfFile[] = CONFFILE2;
  76
  77 enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev,
  78                 Homehost, AutoMode, Policy, PartPolicy, LTEnd };
  79 char *keywords[] = {
  80         [Devices]  = "devices",
  81         [Array]    = "array",
  82         [Mailaddr] = "mailaddr",
  83         [Mailfrom] = "mailfrom",
  84         [Program]  = "program",
  85         [CreateDev]= "create",
  86         [Homehost] = "homehost",
  87         [AutoMode] = "auto",
  88         [Policy]   = "policy",
  89         [PartPolicy]="part-policy",
  90         [LTEnd]    = NULL
  91 };
  92
  93 /*
  94  * match_keyword returns an index into the keywords array, or -1 for no match
  95  * case is ignored, and at least three characters must be given
  96  */
  97
  98 int match_keyword(char *word)
  99 {
 100         int len = strlen(word);
 101         int n;
 102
 103         if (len < 3) return -1;
 104         for (n=0; keywords[n]; n++) {
 105                 if (strncasecmp(word, keywords[n], len)==0)
 106                         return n;
 107         }
 108         return -1;
 109 }
 110
 111 /*
 112  * conf_line reads one logical line from the conffile.
 113  * It skips comments and continues until it finds a line that starts
 114  * with a non blank/comment.  This character is pushed back for the next call
 115  * A doubly linked list of words is returned.
 116  * the first word will be a keyword.  Other words will have had quotes removed.
 117  */
 118
 119 char *conf_line(FILE *file)
 120 {
 121         char *w;
 122         char *list;
 123
 124         w = conf_word(file, 1);
 125         if (w == NULL) return NULL;
 126
 127         list = dl_strdup(w);
 128         free(w);
 129         dl_init(list);
 130
 131         while ((w = conf_word(file,0))){
 132                 char *w2 = dl_strdup(w);
 133                 free(w);
 134                 dl_add(list, w2);
 135         }
 136 /*    printf("got a line\n");*/
 137         return list;
 138 }
 139
 140 void free_line(char *line)
 141 {
 142         char *w;
 143         for (w=dl_next(line); w != line; w=dl_next(line)) {
 144                 dl_del(w);
 145                 dl_free(w);
 146         }
 147         dl_free(line);
 148 }
 149
 150
 151 struct conf_dev {
 152     struct conf_dev *next;
 153     char *name;
 154 } *cdevlist = NULL;
 155
 156 struct mddev_dev *load_partitions(void)
 157 {
 158         FILE *f = fopen("/proc/partitions", "r");
 159         char buf[1024];
 160         struct mddev_dev *rv = NULL;
 161         if (f == NULL) {
 162                 fprintf(stderr, Name ": cannot open /proc/partitions\n");
 163                 return NULL;
 164         }
 165         while (fgets(buf, 1024, f)) {
 166                 int major, minor;
 167                 char *name, *mp;
 168                 struct mddev_dev *d;
 169
 170                 buf[1023] = '\0';
 171                 if (buf[0] != ' ')
 172                         continue;
 173                 major = strtoul(buf, &mp, 10);
 174                 if (mp == buf || *mp != ' ')
 175                         continue;
 176                 minor = strtoul(mp, NULL, 10);
 177
 178                 name = map_dev(major, minor, 1);
 179                 if (!name)
 180                         continue;
 181                 d = malloc(sizeof(*d));
 182                 d->devname = strdup(name);
 183                 d->next = rv;
 184                 d->used = 0;
 185                 rv = d;
 186         }
 187         fclose(f);
 188         return rv;
 189 }
 190
 191 struct mddev_dev *load_containers(void)
 192 {
 193         struct mdstat_ent *mdstat = mdstat_read(1, 0);
 194         struct mdstat_ent *ent;
 195         struct mddev_dev *d;
 196         struct mddev_dev *rv = NULL;
 197
 198         if (!mdstat)
 199                 return NULL;
 200
 201         for (ent = mdstat; ent; ent = ent->next)
 202                 if (ent->metadata_version &&
 203                     strncmp(ent->metadata_version, "external:", 9) == 0 &&
 204                     !is_subarray(&ent->metadata_version[9])) {
 205                         d = malloc(sizeof(*d));
 206                         if (!d)
 207                                 continue;
 208                         if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
 209                                 free(d);
 210                                 continue;
 211                         }
 212                         d->next = rv;
 213                         d->used = 0;
 214                         rv = d;
 215                 }
 216         free_mdstat(mdstat);
 217
 218         return rv;
 219 }
 220
 221 struct createinfo createinfo = {
 222         .autof = 2, /* by default, create devices with standard names */
 223         .symlinks = 1,
 224 #ifdef DEBIAN
 225         .gid = 6, /* disk */
 226         .mode = 0660,
 227 #else
 228         .mode = 0600,
 229 #endif
 230 };
 231
 232 int parse_auto(char *str, char *msg, int config)
 233 {
 234         int autof;
 235         if (str == NULL || *str == 0)
 236                 autof = 2;
 237         else if (strcasecmp(str,"no")==0)
 238                 autof = 1;
 239         else if (strcasecmp(str,"yes")==0)
 240                 autof = 2;
 241         else if (strcasecmp(str,"md")==0)
 242                 autof = config?5:3;
 243         else {
 244                 /* There might be digits, and maybe a hypen, at the end */
 245                 char *e = str + strlen(str);
 246                 int num = 4;
 247                 int len;
 248                 while (e > str && isdigit(e[-1]))
 249                         e--;
 250                 if (*e) {
 251                         num = atoi(e);
 252                         if (num <= 0) num = 1;
 253                 }
 254                 if (e > str && e[-1] == '-')
 255                         e--;
 256                 len = e - str;
 257                 if ((len == 2 && strncasecmp(str,"md",2)==0)) {
 258                         autof = config ? 5 : 3;
 259                 } else if ((len == 3 && strncasecmp(str,"yes",3)==0)) {
 260                         autof = 2;
 261                 } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
 262                         autof = config ? 6 : 4;
 263                 } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
 264                            (len >= 4 && strncasecmp(str,"part",4)==0)) {
 265                         autof = 6;
 266                 } else {
 267                         fprintf(stderr, Name ": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 268                                 "        optionally followed by a number.\n",
 269                                 msg, str);
 270                         exit(2);
 271                 }
 272                 autof |= num << 3;
 273         }
 274         return autof;
 275 }
 276
 277 static void createline(char *line)
 278 {
 279         char *w;
 280         char *ep;
 281
 282         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 283                 if (strncasecmp(w, "auto=", 5) == 0)
 284                         createinfo.autof = parse_auto(w+5, "auto=", 1);
 285                 else if (strncasecmp(w, "owner=", 6) == 0) {
 286                         if (w[6] == 0) {
 287                                 fprintf(stderr, Name ": missing owner name\n");
 288                                 continue;
 289                         }
 290                         createinfo.uid = strtoul(w+6, &ep, 10);
 291                         if (*ep != 0) {
 292                                 struct passwd *pw;
 293                                 /* must be a name */
 294                                 pw = getpwnam(w+6);
 295                                 if (pw)
 296                                         createinfo.uid = pw->pw_uid;
 297                                 else
 298                                         fprintf(stderr, Name ": CREATE user %s not found\n", w+6);
 299                         }
 300                 } else if (strncasecmp(w, "group=", 6) == 0) {
 301                         if (w[6] == 0) {
 302                                 fprintf(stderr, Name ": missing group name\n");
 303                                 continue;
 304                         }
 305                         createinfo.gid = strtoul(w+6, &ep, 10);
 306                         if (*ep != 0) {
 307                                 struct group *gr;
 308                                 /* must be a name */
 309                                 gr = getgrnam(w+6);
 310                                 if (gr)
 311                                         createinfo.gid = gr->gr_gid;
 312                                 else
 313                                         fprintf(stderr, Name ": CREATE group %s not found\n", w+6);
 314                         }
 315                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 316                         if (w[5] == 0) {
 317                                 fprintf(stderr, Name ": missing CREATE mode\n");
 318                                 continue;
 319                         }
 320                         createinfo.mode = strtoul(w+5, &ep, 8);
 321                         if (*ep != 0) {
 322                                 createinfo.mode = 0600;
 323                                 fprintf(stderr, Name ": unrecognised CREATE mode %s\n",
 324                                         w+5);
 325                         }
 326                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 327                         /* style of metadata to use by default */
 328                         int i;
 329                         for (i=0; superlist[i] && !createinfo.supertype; i++)
 330                                 createinfo.supertype =
 331                                         superlist[i]->match_metadata_desc(w+9);
 332                         if (!createinfo.supertype)
 333                                 fprintf(stderr, Name ": metadata format %s unknown, ignoring\n",
 334                                         w+9);
 335                 } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
 336                         createinfo.symlinks = 1;
 337                 else if  (strncasecmp(w, "symlinks=no", 11) == 0)
 338                         createinfo.symlinks = 0;
 339                 else {
 340                         fprintf(stderr, Name ": unrecognised word on CREATE line: %s\n",
 341                                 w);
 342                 }
 343         }
 344 }
 345
 346 void devline(char *line)
 347 {
 348         char *w;
 349         struct conf_dev *cd;
 350
 351         for (w=dl_next(line); w != line; w=dl_next(w)) {
 352                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
 353                     strcasecmp(w, "containers") == 0) {
 354                         cd = malloc(sizeof(*cd));
 355                         cd->name = strdup(w);
 356                         cd->next = cdevlist;
 357                         cdevlist = cd;
 358                 } else {
 359                         fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n",
 360                                 w);
 361                 }
 362         }
 363 }
 364
 365 struct mddev_ident *mddevlist = NULL;
 366 struct mddev_ident **mddevlp = &mddevlist;
 367
 368 static int is_number(char *w)
 369 {
 370         /* check if there are 1 or more digits and nothing else */
 371         int digits = 0;
 372         while (*w && isdigit(*w)) {
 373                 digits++;
 374                 w++;
 375         }
 376         return (digits && ! *w);
 377 }
 378
 379 void arrayline(char *line)
 380 {
 381         char *w;
 382
 383         struct mddev_ident mis;
 384         struct mddev_ident *mi;
 385
 386         mis.uuid_set = 0;
 387         mis.super_minor = UnSet;
 388         mis.level = UnSet;
 389         mis.raid_disks = UnSet;
 390         mis.spare_disks = 0;
 391         mis.devices = NULL;
 392         mis.devname = NULL;
 393         mis.spare_group = NULL;
 394         mis.autof = 0;
 395         mis.next = NULL;
 396         mis.st = NULL;
 397         mis.bitmap_fd = -1;
 398         mis.bitmap_file = NULL;
 399         mis.name[0] = 0;
 400         mis.container = NULL;
 401         mis.member = NULL;
 402
 403         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 404                 if (w[0] == '/' || strchr(w, '=') == NULL) {
 405                         /* This names the device, or is '<ignore>'.
 406                          * The rules match those in create_mddev.
 407                          * 'w' must be:
 408                          *  /dev/md/{anything}
 409                          *  /dev/mdNN
 410                          *  /dev/md_dNN
 411                          *  <ignore>
 412                          *  or anything that doesn't start '/' or '<'
 413                          */
 414                         if (strcasecmp(w, "<ignore>") == 0 ||
 415                             strncmp(w, "/dev/md/", 8) == 0 ||
 416                             (w[0] != '/' && w[0] != '<') ||
 417                             (strncmp(w, "/dev/md", 7) == 0 &&
 418                              is_number(w+7)) ||
 419                             (strncmp(w, "/dev/md_d", 9) == 0 &&
 420                              is_number(w+9))
 421                                 ) {
 422                                 /* This is acceptable */;
 423                                 if (mis.devname)
 424                                         fprintf(stderr, Name ": only give one "
 425                                                 "device per ARRAY line: %s and %s\n",
 426                                                 mis.devname, w);
 427                                 else
 428                                         mis.devname = w;
 429                         }else {
 430                                 fprintf(stderr, Name ": %s is an invalid name for "
 431                                         "an md device - ignored.\n", w);
 432                         }
 433                 } else if (strncasecmp(w, "uuid=", 5)==0 ) {
 434                         if (mis.uuid_set)
 435                                 fprintf(stderr, Name ": only specify uuid once, %s ignored.\n",
 436                                         w);
 437                         else {
 438                                 if (parse_uuid(w+5, mis.uuid))
 439                                         mis.uuid_set = 1;
 440                                 else
 441                                         fprintf(stderr, Name ": bad uuid: %s\n", w);
 442                         }
 443                 } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
 444                         if (mis.super_minor != UnSet)
 445                                 fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
 446                                         w);
 447                         else {
 448                                 char *endptr;
 449                                 int minor = strtol(w+12, &endptr, 10);
 450
 451                                 if (w[12]==0 || endptr[0]!=0 || minor < 0)
 452                                         fprintf(stderr, Name ": invalid super-minor number: %s\n",
 453                                                 w);
 454                                 else
 455                                         mis.super_minor = minor;
 456                         }
 457                 } else if (strncasecmp(w, "name=", 5)==0) {
 458                         if (mis.name[0])
 459                                 fprintf(stderr, Name ": only specify name once, %s ignored.\n",
 460                                         w);
 461                         else if (strlen(w+5) > 32)
 462                                 fprintf(stderr, Name ": name too long, ignoring %s\n", w);
 463                         else
 464                                 strcpy(mis.name, w+5);
 465
 466                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 467                         if (mis.bitmap_file)
 468                                 fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n",
 469                                         w);
 470                         else
 471                                 mis.bitmap_file = strdup(w+7);
 472
 473                 } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
 474                         if (mis.devices)
 475                                 fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n",
 476                                         w);
 477                         else
 478                                 mis.devices = strdup(w+8);
 479                 } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
 480                         if (mis.spare_group)
 481                                 fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n",
 482                                         w);
 483                         else
 484                                 mis.spare_group = strdup(w+12);
 485                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 486                         /* this is mainly for compatability with --brief output */
 487                         mis.level = map_name(pers, w+6);
 488                 } else if (strncasecmp(w, "disks=", 6) == 0 ) {
 489                         /* again, for compat */
 490                         mis.raid_disks = atoi(w+6);
 491                 } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
 492                         /* again, for compat */
 493                         mis.raid_disks = atoi(w+12);
 494                 } else if (strncasecmp(w, "spares=", 7) == 0 ) {
 495                         /* for warning if not all spares present */
 496                         mis.spare_disks = atoi(w+7);
 497                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 498                         /* style of metadata on the devices. */
 499                         int i;
 500
 501                         for(i=0; superlist[i] && !mis.st; i++)
 502                                 mis.st = superlist[i]->match_metadata_desc(w+9);
 503
 504                         if (!mis.st)
 505                                 fprintf(stderr, Name ": metadata format %s unknown, ignored.\n", w+9);
 506                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 507                         /* whether to create device special files as needed */
 508                         mis.autof = parse_auto(w+5, "auto type", 0);
 509                 } else if (strncasecmp(w, "member=", 7) == 0) {
 510                         /* subarray within a container */
 511                         mis.member = strdup(w+7);
 512                 } else if (strncasecmp(w, "container=", 10) == 0) {
 513                         /* the container holding this subarray.  Either a device name
 514                          * or a uuid */
 515                         mis.container = strdup(w+10);
 516                 } else {
 517                         fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
 518                                 w);
 519                 }
 520         }
 521         if (mis.uuid_set == 0 && mis.devices == NULL &&
 522             mis.super_minor == UnSet && mis.name[0] == 0 &&
 523             (mis.container == NULL || mis.member == NULL))
 524                 fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
 525         else {
 526                 mi = malloc(sizeof(*mi));
 527                 *mi = mis;
 528                 mi->devname = mis.devname ? strdup(mis.devname) : NULL;
 529                 mi->next = NULL;
 530                 *mddevlp = mi;
 531                 mddevlp = &mi->next;
 532         }
 533 }
 534
 535 static char *alert_email = NULL;
 536 void mailline(char *line)
 537 {
 538         char *w;
 539
 540         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 541                 if (alert_email == NULL)
 542                         alert_email = strdup(w);
 543                 else
 544                         fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n",
 545                                 w);
 546         }
 547 }
 548
 549 static char *alert_mail_from = NULL;
 550 void mailfromline(char *line)
 551 {
 552         char *w;
 553
 554         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 555                 if (alert_mail_from == NULL)
 556                         alert_mail_from = strdup(w);
 557                 else {
 558                         char *t = NULL;
 559
 560                         if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
 561                                 free(alert_mail_from);
 562                                 alert_mail_from = t;
 563                         }
 564                 }
 565         }
 566 }
 567
 568
 569 static char *alert_program = NULL;
 570 void programline(char *line)
 571 {
 572         char *w;
 573
 574         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 575                 if (alert_program == NULL)
 576                         alert_program = strdup(w);
 577                 else
 578                         fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n",
 579                                 w);
 580         }
 581 }
 582
 583 static char *home_host = NULL;
 584 static int require_homehost = 1;
 585 void homehostline(char *line)
 586 {
 587         char *w;
 588
 589         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 590                 if (strcasecmp(w, "<ignore>")==0)
 591                         require_homehost = 0;
 592                 else if (home_host == NULL)
 593                         home_host = strdup(w);
 594                 else
 595                         fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n",
 596                                 w);
 597         }
 598 }
 599
 600 char auto_yes[] = "yes";
 601 char auto_no[] = "no";
 602 char auto_homehost[] = "homehost";
 603
 604 static int auto_seen = 0;
 605 void autoline(char *line)
 606 {
 607         char *w;
 608         char *seen;
 609         int super_cnt;
 610         char *dflt = auto_yes;
 611         int homehost = 0;
 612         int i;
 613
 614         if (auto_seen) {
 615                 fprintf(stderr, Name ": AUTO line may only be give once."
 616                         "  Subsequent lines ignored\n");
 617                 return;
 618         }
 619         /* Parse the 'auto' line creating policy statements for the 'auto' policy.
 620          *
 621          * The default is 'yes' but the 'auto' line might over-ride that.
 622          * Words in the line are processed in order with the first
 623          * match winning.
 624          * word can be:
 625          *   +version   - that version can be assembled
 626          *   -version   - that version cannot be auto-assembled
 627          *   yes or +all - any other version can be assembled
 628          *   no or -all  - no other version can be assembled.
 629          *   homehost   - any array associated by 'homehost' to this
 630          *                host can be assembled.
 631          *
 632          * Thus:
 633          *   +ddf -0.90 homehost -all
 634          * will auto-assemble any ddf array, no 0.90 array, and
 635          * any other array (imsm, 1.x) if and only if it is identified
 636          * as belonging to this host.
 637          *
 638          * We translate that to policy by creating 'auto=yes' when we see
 639          * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
 640          * or 'auto=homehost' if we see '-version' after 'homehost'.
 641          * When we see yes, no, +all or -all we stop an any version that hasn't
 642          * been seen gets an appropriate auto= entry.
 643          */
 644
 645         for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
 646                 ;
 647         seen = calloc(super_cnt, 1);
 648
 649         for (w = dl_next(line); w != line ; w = dl_next(w)) {
 650                 char *val;
 651
 652                 if (strcasecmp(w, "yes") == 0) {
 653                         dflt = auto_yes;
 654                         break;
 655                 }
 656                 if (strcasecmp(w, "no") == 0) {
 657                         if (homehost)
 658                                 dflt = auto_homehost;
 659                         else
 660                                 dflt = auto_no;
 661                         break;
 662                 }
 663                 if (strcasecmp(w, "homehost") == 0) {
 664                         homehost = 1;
 665                         continue;
 666                 }
 667                 if (w[0] == '+')
 668                         val = auto_yes;
 669                 else if (w[0] == '-') {
 670                         if (homehost)
 671                                 val = auto_homehost;
 672                         else
 673                                 val = auto_no;
 674                 } else
 675                         continue;
 676
 677                 if (strcasecmp(w+1, "all") == 0) {
 678                         dflt = val;
 679                         break;
 680                 }
 681                 for (i = 0; superlist[i]; i++) {
 682                         const char *version = superlist[i]->name;
 683                         if (strcasecmp(w+1, version) == 0)
 684                                 break;
 685                         /* 1 matches 1.x, 0 matches 0.90 */
 686                         if (version[1] == '.' &&
 687                             strlen(w+1) == 1 &&
 688                             w[1] == version[0])
 689                                 break;
 690                         /* 1.anything matches 1.x */
 691                         if (strcmp(version, "1.x") == 0 &&
 692                             strncmp(w+1, "1.", 2) == 0)
 693                                 break;
 694                 }
 695                 if (superlist[i] == NULL)
 696                         /* ignore this word */
 697                         continue;
 698                 if (seen[i])
 699                         /* already know about this metadata */
 700                         continue;
 701                 policy_add(rule_policy, pol_auto, val, pol_metadata, superlist[i]->name, NULL);
 702                 seen[i] = 1;
 703         }
 704         for (i = 0; i < super_cnt; i++)
 705                 if (!seen[i])
 706                         policy_add(rule_policy, pol_auto, dflt, pol_metadata, superlist[i]->name, NULL);
 707 }
 708
 709 int loaded = 0;
 710
 711 static char *conffile = NULL;
 712 void set_conffile(char *file)
 713 {
 714         conffile = file;
 715 }
 716
 717 void load_conffile(void)
 718 {
 719         FILE *f;
 720         char *line;
 721
 722         if (loaded) return;
 723         if (conffile == NULL)
 724                 conffile = DefaultConfFile;
 725
 726         if (strcmp(conffile, "none") == 0) {
 727                 loaded = 1;
 728                 return;
 729         }
 730         if (strcmp(conffile, "partitions")==0) {
 731                 char *list = dl_strdup("DEV");
 732                 dl_init(list);
 733                 dl_add(list, dl_strdup("partitions"));
 734                 devline(list);
 735                 free_line(list);
 736                 loaded = 1;
 737                 return;
 738         }
 739         f = fopen(conffile, "r");
 740         /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 741          * To allow Debian users to compile from clean source and still
 742          * have a working mdadm, we read /etc/mdadm/mdadm.conf
 743          * if /etc/mdadm.conf doesn't exist
 744          */
 745         if (f == NULL &&
 746             conffile == DefaultConfFile) {
 747                 f = fopen(DefaultAltConfFile, "r");
 748                 if (f)
 749                         conffile = DefaultAltConfFile;
 750         }
 751         if (f == NULL)
 752                 return;
 753
 754         loaded = 1;
 755         while ((line=conf_line(f))) {
 756                 switch(match_keyword(line)) {
 757                 case Devices:
 758                         devline(line);
 759                         break;
 760                 case Array:
 761                         arrayline(line);
 762                         break;
 763                 case Mailaddr:
 764                         mailline(line);
 765                         break;
 766                 case Mailfrom:
 767                         mailfromline(line);
 768                         break;
 769                 case Program:
 770                         programline(line);
 771                         break;
 772                 case CreateDev:
 773                         createline(line);
 774                         break;
 775                 case Homehost:
 776                         homehostline(line);
 777                         break;
 778                 case AutoMode:
 779                         autoline(line);
 780                         break;
 781                 case Policy:
 782                         policyline(line, rule_policy);
 783                         break;
 784                 case PartPolicy:
 785                         policyline(line, rule_part);
 786                         break;
 787                 default:
 788                         fprintf(stderr, Name ": Unknown keyword %s\n", line);
 789                 }
 790                 free_line(line);
 791         }
 792
 793         fclose(f);
 794
 795 /*    printf("got file\n"); */
 796 }
 797
 798 char *conf_get_mailaddr(void)
 799 {
 800         load_conffile();
 801         return alert_email;
 802 }
 803
 804 char *conf_get_mailfrom(void)
 805 {
 806         load_conffile();
 807         return alert_mail_from;
 808 }
 809
 810 char *conf_get_program(void)
 811 {
 812         load_conffile();
 813         return alert_program;
 814 }
 815
 816 char *conf_get_homehost(int *require_homehostp)
 817 {
 818         load_conffile();
 819         if (require_homehostp)
 820                 *require_homehostp = require_homehost;
 821         return home_host;
 822 }
 823
 824 struct createinfo *conf_get_create_info(void)
 825 {
 826         load_conffile();
 827         return &createinfo;
 828 }
 829
 830 struct mddev_ident *conf_get_ident(char *dev)
 831 {
 832         struct mddev_ident *rv;
 833         load_conffile();
 834         rv = mddevlist;
 835         while (dev && rv && (rv->devname == NULL
 836                              || !devname_matches(dev, rv->devname)))
 837                 rv = rv->next;
 838         return rv;
 839 }
 840
 841 static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
 842 {
 843         while (*dlp)
 844                 dlp = &(*dlp)->next;
 845         *dlp = list;
 846 }
 847
 848 struct mddev_dev *conf_get_devs()
 849 {
 850         glob_t globbuf;
 851         struct conf_dev *cd;
 852         int flags = 0;
 853         static struct mddev_dev *dlist = NULL;
 854         unsigned int i;
 855
 856         while (dlist) {
 857                 struct mddev_dev *t = dlist;
 858                 dlist = dlist->next;
 859                 free(t->devname);
 860                 free(t);
 861         }
 862
 863         load_conffile();
 864
 865         if (cdevlist == NULL) {
 866                 /* default to 'partitions' and 'containers' */
 867                 dlist = load_partitions();
 868                 append_dlist(&dlist, load_containers());
 869         }
 870
 871         for (cd=cdevlist; cd; cd=cd->next) {
 872                 if (strcasecmp(cd->name, "partitions")==0)
 873                         append_dlist(&dlist, load_partitions());
 874                 else if (strcasecmp(cd->name, "containers")==0)
 875                         append_dlist(&dlist, load_containers());
 876                 else {
 877                         glob(cd->name, flags, NULL, &globbuf);
 878                         flags |= GLOB_APPEND;
 879                 }
 880         }
 881         if (flags & GLOB_APPEND) {
 882                 for (i=0; i<globbuf.gl_pathc; i++) {
 883                         struct mddev_dev *t = malloc(sizeof(*t));
 884                         t->devname = strdup(globbuf.gl_pathv[i]);
 885                         t->next = dlist;
 886                         t->used = 0;
 887                         dlist = t;
 888 /*      printf("one dev is %s\n", t->devname);*/
 889                 }
 890                 globfree(&globbuf);
 891         }
 892
 893         return dlist;
 894 }
 895
 896 int conf_test_dev(char *devname)
 897 {
 898         struct conf_dev *cd;
 899         if (cdevlist == NULL)
 900                 /* allow anything by default */
 901                 return 1;
 902         for (cd = cdevlist ; cd ; cd = cd->next) {
 903                 if (strcasecmp(cd->name, "partitions") == 0)
 904                         return 1;
 905                 if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
 906                         return 1;
 907         }
 908         return 0;
 909 }
 910
 911 int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
 912 {
 913         /* If anyone said 'yes', that sticks.
 914          * else if homehost applies, use that
 915          * else if there is a 'no', say 'no'.
 916          * else 'yes'.
 917          */
 918         struct dev_policy *p;
 919         int no=0, found_auto=0;
 920         load_conffile();
 921
 922         pol = pol_find(pol, pol_auto);
 923         pol_for_each(p, pol, version) {
 924                 if (strcmp(p->value, "yes") == 0)
 925                         return 1;
 926                 if (strcmp(p->value, "auto") == 0)
 927                         found_auto = 1;
 928                 if (strcmp(p->value, "no") == 0)
 929                         no = 1;
 930         }
 931         if (is_homehost && found_auto)
 932                 return 1;
 933         if (no)
 934                 return 0;
 935         return 1;
 936 }
 937
 938 int match_oneof(char *devices, char *devname)
 939 {
 940     /* check if one of the comma separated patterns in devices
 941      * matches devname
 942      */
 943
 944     while (devices && *devices) {
 945         char patn[1024];
 946         char *p = devices;
 947         devices = strchr(devices, ',');
 948         if (!devices)
 949             devices = p + strlen(p);
 950         if (devices-p < 1024) {
 951                 strncpy(patn, p, devices-p);
 952                 patn[devices-p] = 0;
 953                 if (fnmatch(patn, devname, FNM_PATHNAME)==0)
 954                         return 1;
 955         }
 956         if (*devices == ',')
 957                 devices++;
 958     }
 959     return 0;
 960 }
 961
 962 int devname_matches(char *name, char *match)
 963 {
 964         /* See if the given array name matches the
 965          * given match from config file.
 966          *
 967          * First strip and /dev/md/ or /dev/, then
 968          * see if there might be a numeric match of
 969          *  mdNN with NN
 970          * then just strcmp
 971          */
 972         if (strncmp(name, "/dev/md/", 8) == 0)
 973                 name += 8;
 974         else if (strncmp(name, "/dev/", 5) == 0)
 975                 name += 5;
 976
 977         if (strncmp(match, "/dev/md/", 8) == 0)
 978                 match += 8;
 979         else if (strncmp(match, "/dev/", 5) == 0)
 980                 match += 5;
 981
 982
 983         if (strncmp(name, "md", 2) == 0 &&
 984             isdigit(name[2]))
 985                 name += 2;
 986         if (strncmp(match, "md", 2) == 0 &&
 987             isdigit(match[2]))
 988                 match += 2;
 989
 990         return (strcmp(name, match) == 0);
 991 }
 992
 993 int conf_name_is_free(char *name)
 994 {
 995         /* Check if this name is already take by an ARRAY entry in
 996          * the config file.
 997          * It can be taken either by a match on devname, name, or
 998          * even super-minor.
 999          */
1000         struct mddev_ident *dev;
1001
1002         load_conffile();
1003         for (dev = mddevlist; dev; dev = dev->next) {
1004                 char nbuf[100];
1005                 if (dev->devname && devname_matches(name, dev->devname))
1006                         return 0;
1007                 if (dev->name[0] && devname_matches(name, dev->name))
1008                         return 0;
1009                 sprintf(nbuf, "%d", dev->super_minor);
1010                 if (dev->super_minor != UnSet &&
1011                     devname_matches(name, nbuf))
1012                         return 0;
1013         }
1014         return 1;
1015 }
1016
1017 struct mddev_ident *conf_match(struct mdinfo *info, struct supertype *st)
1018 {
1019         struct mddev_ident *array_list, *match;
1020         int verbose = 0;
1021         char *devname = NULL;
1022         array_list = conf_get_ident(NULL);
1023         match = NULL;
1024         for (; array_list; array_list = array_list->next) {
1025                 if (array_list->uuid_set &&
1026                     same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid)
1027                     == 0) {
1028                         if (verbose >= 2 && array_list->devname)
1029                                 fprintf(stderr, Name
1030                                         ": UUID differs from %s.\n",
1031                                         array_list->devname);
1032                         continue;
1033                 }
1034                 if (array_list->name[0] &&
1035                     strcasecmp(array_list->name, info->name) != 0) {
1036                         if (verbose >= 2 && array_list->devname)
1037                                 fprintf(stderr, Name
1038                                         ": Name differs from %s.\n",
1039                                         array_list->devname);
1040                         continue;
1041                 }
1042                 if (array_list->devices && devname &&
1043                     !match_oneof(array_list->devices, devname)) {
1044                         if (verbose >= 2 && array_list->devname)
1045                                 fprintf(stderr, Name
1046                                         ": Not a listed device for %s.\n",
1047                                         array_list->devname);
1048                         continue;
1049                 }
1050                 if (array_list->super_minor != UnSet &&
1051                     array_list->super_minor != info->array.md_minor) {
1052                         if (verbose >= 2 && array_list->devname)
1053                                 fprintf(stderr, Name
1054                                         ": Different super-minor to %s.\n",
1055                                         array_list->devname);
1056                         continue;
1057                 }
1058                 if (!array_list->uuid_set &&
1059                     !array_list->name[0] &&
1060                     !array_list->devices &&
1061                     array_list->super_minor == UnSet) {
1062                         if (verbose >= 2 && array_list->devname)
1063                                 fprintf(stderr, Name
1064                              ": %s doesn't have any identifying information.\n",
1065                                         array_list->devname);
1066                         continue;
1067                 }
1068                 /* FIXME, should I check raid_disks and level too?? */
1069
1070                 if (match) {
1071                         if (verbose >= 0) {
1072                                 if (match->devname && array_list->devname)
1073                                         fprintf(stderr, Name
1074                    ": we match both %s and %s - cannot decide which to use.\n",
1075                                                 match->devname, array_list->devname);
1076                                 else
1077                                         fprintf(stderr, Name
1078                                                 ": multiple lines in mdadm.conf match\n");
1079                         }
1080                         return NULL;
1081                 }
1082                 match = array_list;
1083         }
1084         return match;
1085 }