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 /* conf_word gets one word from the conf file.
 112  * if "allow_key", then accept words at the start of a line,
 113  * otherwise stop when such a word is found.
 114  * We assume that the file pointer is at the end of a word, so the
 115  * next character is a space, or a newline.  If not, it is the start of a line.
 116  */
 117
 118 char *conf_word(FILE *file, int allow_key)
 119 {
 120         int wsize = 100;
 121         int len = 0;
 122         int c;
 123         int quote;
 124         int wordfound = 0;
 125         char *word = malloc(wsize);
 126
 127         if (!word) abort();
 128
 129         while (wordfound==0) {
 130                 /* at the end of a word.. */
 131                 c = getc(file);
 132                 if (c == '#')
 133                         while (c != EOF && c != '\n')
 134                                 c = getc(file);
 135                 if (c == EOF) break;
 136                 if (c == '\n') continue;
 137
 138                 if (c != ' ' && c != '\t' && ! allow_key) {
 139                         ungetc(c, file);
 140                         break;
 141                 }
 142                 /* looks like it is safe to get a word here, if there is one */
 143                 quote = 0;
 144                 /* first, skip any spaces */
 145                 while (c == ' ' || c == '\t')
 146                         c = getc(file);
 147                 if (c != EOF && c != '\n' && c != '#') {
 148                         /* we really have a character of a word, so start saving it */
 149                         while (c != EOF && c != '\n' && (quote || (c!=' ' && c != '\t'))) {
 150                                 wordfound = 1;
 151                                 if (quote && c == quote) quote = 0;
 152                                 else if (quote == 0 && (c == '\'' || c == '"'))
 153                                         quote = c;
 154                                 else {
 155                                         if (len == wsize-1) {
 156                                                 wsize += 100;
 157                                                 word = realloc(word, wsize);
 158                                                 if (!word) abort();
 159                                         }
 160                                         word[len++] = c;
 161                                 }
 162                                 c = getc(file);
 163                                 /* Hack for broken kernels (2.6.14-.24) that put
 164                                  *        "active(auto-read-only)"
 165                                  * in /proc/mdstat instead of
 166                                  *        "active (auto-read-only)"
 167                                  */
 168                                 if (c == '(' && len >= 6
 169                                     && strncmp(word+len-6, "active", 6) == 0)
 170                                         c = ' ';
 171                         }
 172                 }
 173                 if (c != EOF) ungetc(c, file);
 174         }
 175         word[len] = 0;
 176
 177         /* Further HACK for broken kernels.. 2.6.14-2.6.24 */
 178         if (strcmp(word, "auto-read-only)") == 0)
 179                 strcpy(word, "(auto-read-only)");
 180
 181 /*    printf("word is <%s>\n", word); */
 182         if (!wordfound) {
 183                 free(word);
 184                 word = NULL;
 185         }
 186         return word;
 187 }
 188
 189 /*
 190  * conf_line reads one logical line from the conffile.
 191  * It skips comments and continues until it finds a line that starts
 192  * with a non blank/comment.  This character is pushed back for the next call
 193  * A doubly linked list of words is returned.
 194  * the first word will be a keyword.  Other words will have had quotes removed.
 195  */
 196
 197 char *conf_line(FILE *file)
 198 {
 199         char *w;
 200         char *list;
 201
 202         w = conf_word(file, 1);
 203         if (w == NULL) return NULL;
 204
 205         list = dl_strdup(w);
 206         free(w);
 207         dl_init(list);
 208
 209         while ((w = conf_word(file,0))){
 210                 char *w2 = dl_strdup(w);
 211                 free(w);
 212                 dl_add(list, w2);
 213         }
 214 /*    printf("got a line\n");*/
 215         return list;
 216 }
 217
 218 void free_line(char *line)
 219 {
 220         char *w;
 221         for (w=dl_next(line); w != line; w=dl_next(line)) {
 222                 dl_del(w);
 223                 dl_free(w);
 224         }
 225         dl_free(line);
 226 }
 227
 228
 229 struct conf_dev {
 230     struct conf_dev *next;
 231     char *name;
 232 } *cdevlist = NULL;
 233
 234 struct mddev_dev *load_partitions(void)
 235 {
 236         FILE *f = fopen("/proc/partitions", "r");
 237         char buf[1024];
 238         struct mddev_dev *rv = NULL;
 239         if (f == NULL) {
 240                 fprintf(stderr, Name ": cannot open /proc/partitions\n");
 241                 return NULL;
 242         }
 243         while (fgets(buf, 1024, f)) {
 244                 int major, minor;
 245                 char *name, *mp;
 246                 struct mddev_dev *d;
 247
 248                 buf[1023] = '\0';
 249                 if (buf[0] != ' ')
 250                         continue;
 251                 major = strtoul(buf, &mp, 10);
 252                 if (mp == buf || *mp != ' ')
 253                         continue;
 254                 minor = strtoul(mp, NULL, 10);
 255
 256                 name = map_dev(major, minor, 1);
 257                 if (!name)
 258                         continue;
 259                 d = malloc(sizeof(*d));
 260                 d->devname = strdup(name);
 261                 d->next = rv;
 262                 d->used = 0;
 263                 rv = d;
 264         }
 265         fclose(f);
 266         return rv;
 267 }
 268
 269 struct mddev_dev *load_containers(void)
 270 {
 271         struct mdstat_ent *mdstat = mdstat_read(1, 0);
 272         struct mdstat_ent *ent;
 273         struct mddev_dev *d;
 274         struct mddev_dev *rv = NULL;
 275
 276         if (!mdstat)
 277                 return NULL;
 278
 279         for (ent = mdstat; ent; ent = ent->next)
 280                 if (ent->metadata_version &&
 281                     strncmp(ent->metadata_version, "external:", 9) == 0 &&
 282                     !is_subarray(&ent->metadata_version[9])) {
 283                         d = malloc(sizeof(*d));
 284                         if (!d)
 285                                 continue;
 286                         if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
 287                                 free(d);
 288                                 continue;
 289                         }
 290                         d->next = rv;
 291                         d->used = 0;
 292                         rv = d;
 293                 }
 294         free_mdstat(mdstat);
 295
 296         return rv;
 297 }
 298
 299 struct createinfo createinfo = {
 300         .autof = 2, /* by default, create devices with standard names */
 301         .symlinks = 1,
 302 #ifdef DEBIAN
 303         .gid = 6, /* disk */
 304         .mode = 0660,
 305 #else
 306         .mode = 0600,
 307 #endif
 308 };
 309
 310 int parse_auto(char *str, char *msg, int config)
 311 {
 312         int autof;
 313         if (str == NULL || *str == 0)
 314                 autof = 2;
 315         else if (strcasecmp(str,"no")==0)
 316                 autof = 1;
 317         else if (strcasecmp(str,"yes")==0)
 318                 autof = 2;
 319         else if (strcasecmp(str,"md")==0)
 320                 autof = config?5:3;
 321         else {
 322                 /* There might be digits, and maybe a hypen, at the end */
 323                 char *e = str + strlen(str);
 324                 int num = 4;
 325                 int len;
 326                 while (e > str && isdigit(e[-1]))
 327                         e--;
 328                 if (*e) {
 329                         num = atoi(e);
 330                         if (num <= 0) num = 1;
 331                 }
 332                 if (e > str && e[-1] == '-')
 333                         e--;
 334                 len = e - str;
 335                 if ((len == 2 && strncasecmp(str,"md",2)==0)) {
 336                         autof = config ? 5 : 3;
 337                 } else if ((len == 3 && strncasecmp(str,"yes",3)==0)) {
 338                         autof = 2;
 339                 } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
 340                         autof = config ? 6 : 4;
 341                 } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
 342                            (len >= 4 && strncasecmp(str,"part",4)==0)) {
 343                         autof = 6;
 344                 } else {
 345                         fprintf(stderr, Name ": %s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 346                                 "        optionally followed by a number.\n",
 347                                 msg, str);
 348                         exit(2);
 349                 }
 350                 autof |= num << 3;
 351         }
 352         return autof;
 353 }
 354
 355 static void createline(char *line)
 356 {
 357         char *w;
 358         char *ep;
 359
 360         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 361                 if (strncasecmp(w, "auto=", 5) == 0)
 362                         createinfo.autof = parse_auto(w+5, "auto=", 1);
 363                 else if (strncasecmp(w, "owner=", 6) == 0) {
 364                         if (w[6] == 0) {
 365                                 fprintf(stderr, Name ": missing owner name\n");
 366                                 continue;
 367                         }
 368                         createinfo.uid = strtoul(w+6, &ep, 10);
 369                         if (*ep != 0) {
 370                                 struct passwd *pw;
 371                                 /* must be a name */
 372                                 pw = getpwnam(w+6);
 373                                 if (pw)
 374                                         createinfo.uid = pw->pw_uid;
 375                                 else
 376                                         fprintf(stderr, Name ": CREATE user %s not found\n", w+6);
 377                         }
 378                 } else if (strncasecmp(w, "group=", 6) == 0) {
 379                         if (w[6] == 0) {
 380                                 fprintf(stderr, Name ": missing group name\n");
 381                                 continue;
 382                         }
 383                         createinfo.gid = strtoul(w+6, &ep, 10);
 384                         if (*ep != 0) {
 385                                 struct group *gr;
 386                                 /* must be a name */
 387                                 gr = getgrnam(w+6);
 388                                 if (gr)
 389                                         createinfo.gid = gr->gr_gid;
 390                                 else
 391                                         fprintf(stderr, Name ": CREATE group %s not found\n", w+6);
 392                         }
 393                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 394                         if (w[5] == 0) {
 395                                 fprintf(stderr, Name ": missing CREATE mode\n");
 396                                 continue;
 397                         }
 398                         createinfo.mode = strtoul(w+5, &ep, 8);
 399                         if (*ep != 0) {
 400                                 createinfo.mode = 0600;
 401                                 fprintf(stderr, Name ": unrecognised CREATE mode %s\n",
 402                                         w+5);
 403                         }
 404                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 405                         /* style of metadata to use by default */
 406                         int i;
 407                         for (i=0; superlist[i] && !createinfo.supertype; i++)
 408                                 createinfo.supertype =
 409                                         superlist[i]->match_metadata_desc(w+9);
 410                         if (!createinfo.supertype)
 411                                 fprintf(stderr, Name ": metadata format %s unknown, ignoring\n",
 412                                         w+9);
 413                 } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
 414                         createinfo.symlinks = 1;
 415                 else if  (strncasecmp(w, "symlinks=no", 11) == 0)
 416                         createinfo.symlinks = 0;
 417                 else {
 418                         fprintf(stderr, Name ": unrecognised word on CREATE line: %s\n",
 419                                 w);
 420                 }
 421         }
 422 }
 423
 424 void devline(char *line)
 425 {
 426         char *w;
 427         struct conf_dev *cd;
 428
 429         for (w=dl_next(line); w != line; w=dl_next(w)) {
 430                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
 431                     strcasecmp(w, "containers") == 0) {
 432                         cd = malloc(sizeof(*cd));
 433                         cd->name = strdup(w);
 434                         cd->next = cdevlist;
 435                         cdevlist = cd;
 436                 } else {
 437                         fprintf(stderr, Name ": unreconised word on DEVICE line: %s\n",
 438                                 w);
 439                 }
 440         }
 441 }
 442
 443 struct mddev_ident *mddevlist = NULL;
 444 struct mddev_ident **mddevlp = &mddevlist;
 445
 446 static int is_number(char *w)
 447 {
 448         /* check if there are 1 or more digits and nothing else */
 449         int digits = 0;
 450         while (*w && isdigit(*w)) {
 451                 digits++;
 452                 w++;
 453         }
 454         return (digits && ! *w);
 455 }
 456
 457 void arrayline(char *line)
 458 {
 459         char *w;
 460
 461         struct mddev_ident mis;
 462         struct mddev_ident *mi;
 463
 464         mis.uuid_set = 0;
 465         mis.super_minor = UnSet;
 466         mis.level = UnSet;
 467         mis.raid_disks = UnSet;
 468         mis.spare_disks = 0;
 469         mis.devices = NULL;
 470         mis.devname = NULL;
 471         mis.spare_group = NULL;
 472         mis.autof = 0;
 473         mis.next = NULL;
 474         mis.st = NULL;
 475         mis.bitmap_fd = -1;
 476         mis.bitmap_file = NULL;
 477         mis.name[0] = 0;
 478         mis.container = NULL;
 479         mis.member = NULL;
 480
 481         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 482                 if (w[0] == '/' || strchr(w, '=') == NULL) {
 483                         /* This names the device, or is '<ignore>'.
 484                          * The rules match those in create_mddev.
 485                          * 'w' must be:
 486                          *  /dev/md/{anything}
 487                          *  /dev/mdNN
 488                          *  /dev/md_dNN
 489                          *  <ignore>
 490                          *  or anything that doesn't start '/' or '<'
 491                          */
 492                         if (strcasecmp(w, "<ignore>") == 0 ||
 493                             strncmp(w, "/dev/md/", 8) == 0 ||
 494                             (w[0] != '/' && w[0] != '<') ||
 495                             (strncmp(w, "/dev/md", 7) == 0 &&
 496                              is_number(w+7)) ||
 497                             (strncmp(w, "/dev/md_d", 9) == 0 &&
 498                              is_number(w+9))
 499                                 ) {
 500                                 /* This is acceptable */;
 501                                 if (mis.devname)
 502                                         fprintf(stderr, Name ": only give one "
 503                                                 "device per ARRAY line: %s and %s\n",
 504                                                 mis.devname, w);
 505                                 else
 506                                         mis.devname = w;
 507                         }else {
 508                                 fprintf(stderr, Name ": %s is an invalid name for "
 509                                         "an md device - ignored.\n", w);
 510                         }
 511                 } else if (strncasecmp(w, "uuid=", 5)==0 ) {
 512                         if (mis.uuid_set)
 513                                 fprintf(stderr, Name ": only specify uuid once, %s ignored.\n",
 514                                         w);
 515                         else {
 516                                 if (parse_uuid(w+5, mis.uuid))
 517                                         mis.uuid_set = 1;
 518                                 else
 519                                         fprintf(stderr, Name ": bad uuid: %s\n", w);
 520                         }
 521                 } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
 522                         if (mis.super_minor != UnSet)
 523                                 fprintf(stderr, Name ": only specify super-minor once, %s ignored.\n",
 524                                         w);
 525                         else {
 526                                 char *endptr;
 527                                 int minor = strtol(w+12, &endptr, 10);
 528
 529                                 if (w[12]==0 || endptr[0]!=0 || minor < 0)
 530                                         fprintf(stderr, Name ": invalid super-minor number: %s\n",
 531                                                 w);
 532                                 else
 533                                         mis.super_minor = minor;
 534                         }
 535                 } else if (strncasecmp(w, "name=", 5)==0) {
 536                         if (mis.name[0])
 537                                 fprintf(stderr, Name ": only specify name once, %s ignored.\n",
 538                                         w);
 539                         else if (strlen(w+5) > 32)
 540                                 fprintf(stderr, Name ": name too long, ignoring %s\n", w);
 541                         else
 542                                 strcpy(mis.name, w+5);
 543
 544                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 545                         if (mis.bitmap_file)
 546                                 fprintf(stderr, Name ": only specify bitmap file once. %s ignored\n",
 547                                         w);
 548                         else
 549                                 mis.bitmap_file = strdup(w+7);
 550
 551                 } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
 552                         if (mis.devices)
 553                                 fprintf(stderr, Name ": only specify devices once (use a comma separated list). %s ignored\n",
 554                                         w);
 555                         else
 556                                 mis.devices = strdup(w+8);
 557                 } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
 558                         if (mis.spare_group)
 559                                 fprintf(stderr, Name ": only specify one spare group per array. %s ignored.\n",
 560                                         w);
 561                         else
 562                                 mis.spare_group = strdup(w+12);
 563                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 564                         /* this is mainly for compatability with --brief output */
 565                         mis.level = map_name(pers, w+6);
 566                 } else if (strncasecmp(w, "disks=", 6) == 0 ) {
 567                         /* again, for compat */
 568                         mis.raid_disks = atoi(w+6);
 569                 } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
 570                         /* again, for compat */
 571                         mis.raid_disks = atoi(w+12);
 572                 } else if (strncasecmp(w, "spares=", 7) == 0 ) {
 573                         /* for warning if not all spares present */
 574                         mis.spare_disks = atoi(w+7);
 575                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 576                         /* style of metadata on the devices. */
 577                         int i;
 578
 579                         for(i=0; superlist[i] && !mis.st; i++)
 580                                 mis.st = superlist[i]->match_metadata_desc(w+9);
 581
 582                         if (!mis.st)
 583                                 fprintf(stderr, Name ": metadata format %s unknown, ignored.\n", w+9);
 584                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 585                         /* whether to create device special files as needed */
 586                         mis.autof = parse_auto(w+5, "auto type", 0);
 587                 } else if (strncasecmp(w, "member=", 7) == 0) {
 588                         /* subarray within a container */
 589                         mis.member = strdup(w+7);
 590                 } else if (strncasecmp(w, "container=", 10) == 0) {
 591                         /* the container holding this subarray.  Either a device name
 592                          * or a uuid */
 593                         mis.container = strdup(w+10);
 594                 } else {
 595                         fprintf(stderr, Name ": unrecognised word on ARRAY line: %s\n",
 596                                 w);
 597                 }
 598         }
 599         if (mis.uuid_set == 0 && mis.devices == NULL &&
 600             mis.super_minor == UnSet && mis.name[0] == 0 &&
 601             (mis.container == NULL || mis.member == NULL))
 602                 fprintf(stderr, Name ": ARRAY line %s has no identity information.\n", mis.devname);
 603         else {
 604                 mi = malloc(sizeof(*mi));
 605                 *mi = mis;
 606                 mi->devname = mis.devname ? strdup(mis.devname) : NULL;
 607                 mi->next = NULL;
 608                 *mddevlp = mi;
 609                 mddevlp = &mi->next;
 610         }
 611 }
 612
 613 static char *alert_email = NULL;
 614 void mailline(char *line)
 615 {
 616         char *w;
 617
 618         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 619                 if (alert_email == NULL)
 620                         alert_email = strdup(w);
 621                 else
 622                         fprintf(stderr, Name ": excess address on MAIL line: %s - ignored\n",
 623                                 w);
 624         }
 625 }
 626
 627 static char *alert_mail_from = NULL;
 628 void mailfromline(char *line)
 629 {
 630         char *w;
 631
 632         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 633                 if (alert_mail_from == NULL)
 634                         alert_mail_from = strdup(w);
 635                 else {
 636                         char *t = NULL;
 637
 638                         if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
 639                                 free(alert_mail_from);
 640                                 alert_mail_from = t;
 641                         }
 642                 }
 643         }
 644 }
 645
 646
 647 static char *alert_program = NULL;
 648 void programline(char *line)
 649 {
 650         char *w;
 651
 652         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 653                 if (alert_program == NULL)
 654                         alert_program = strdup(w);
 655                 else
 656                         fprintf(stderr, Name ": excess program on PROGRAM line: %s - ignored\n",
 657                                 w);
 658         }
 659 }
 660
 661 static char *home_host = NULL;
 662 static int require_homehost = 1;
 663 void homehostline(char *line)
 664 {
 665         char *w;
 666
 667         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 668                 if (strcasecmp(w, "<ignore>")==0)
 669                         require_homehost = 0;
 670                 else if (home_host == NULL)
 671                         home_host = strdup(w);
 672                 else
 673                         fprintf(stderr, Name ": excess host name on HOMEHOST line: %s - ignored\n",
 674                                 w);
 675         }
 676 }
 677
 678 char auto_yes[] = "yes";
 679 char auto_no[] = "no";
 680 char auto_homehost[] = "homehost";
 681
 682 static int auto_seen = 0;
 683 void autoline(char *line)
 684 {
 685         char *w;
 686         char *seen;
 687         int super_cnt;
 688         char *dflt = auto_yes;
 689         int homehost = 0;
 690         int i;
 691
 692         if (auto_seen) {
 693                 fprintf(stderr, Name ": AUTO line may only be give once."
 694                         "  Subsequent lines ignored\n");
 695                 return;
 696         }
 697         /* Parse the 'auto' line creating policy statements for the 'auto' policy.
 698          *
 699          * The default is 'yes' but the 'auto' line might over-ride that.
 700          * Words in the line are processed in order with the first
 701          * match winning.
 702          * word can be:
 703          *   +version   - that version can be assembled
 704          *   -version   - that version cannot be auto-assembled
 705          *   yes or +all - any other version can be assembled
 706          *   no or -all  - no other version can be assembled.
 707          *   homehost   - any array associated by 'homehost' to this
 708          *                host can be assembled.
 709          *
 710          * Thus:
 711          *   +ddf -0.90 homehost -all
 712          * will auto-assemble any ddf array, no 0.90 array, and
 713          * any other array (imsm, 1.x) if and only if it is identified
 714          * as belonging to this host.
 715          *
 716          * We translate that to policy by creating 'auto=yes' when we see
 717          * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
 718          * or 'auto=homehost' if we see '-version' after 'homehost'.
 719          * When we see yes, no, +all or -all we stop an any version that hasn't
 720          * been seen gets an appropriate auto= entry.
 721          */
 722
 723         for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
 724                 ;
 725         seen = calloc(super_cnt, 1);
 726
 727         for (w = dl_next(line); w != line ; w = dl_next(w)) {
 728                 char *val;
 729
 730                 if (strcasecmp(w, "yes") == 0) {
 731                         dflt = auto_yes;
 732                         break;
 733                 }
 734                 if (strcasecmp(w, "no") == 0) {
 735                         if (homehost)
 736                                 dflt = auto_homehost;
 737                         else
 738                                 dflt = auto_no;
 739                         break;
 740                 }
 741                 if (strcasecmp(w, "homehost") == 0) {
 742                         homehost = 1;
 743                         continue;
 744                 }
 745                 if (w[0] == '+')
 746                         val = auto_yes;
 747                 else if (w[0] == '-') {
 748                         if (homehost)
 749                                 val = auto_homehost;
 750                         else
 751                                 val = auto_no;
 752                 } else
 753                         continue;
 754
 755                 if (strcasecmp(w+1, "all") == 0) {
 756                         dflt = val;
 757                         break;
 758                 }
 759                 for (i = 0; superlist[i]; i++) {
 760                         const char *version = superlist[i]->name;
 761                         if (strcasecmp(w+1, version) == 0)
 762                                 break;
 763                         /* 1 matches 1.x, 0 matches 0.90 */
 764                         if (version[1] == '.' &&
 765                             strlen(w+1) == 1 &&
 766                             w[1] == version[0])
 767                                 break;
 768                         /* 1.anything matches 1.x */
 769                         if (strcmp(version, "1.x") == 0 &&
 770                             strncmp(w+1, "1.", 2) == 0)
 771                                 break;
 772                 }
 773                 if (superlist[i] == NULL)
 774                         /* ignore this word */
 775                         continue;
 776                 if (seen[i])
 777                         /* already know about this metadata */
 778                         continue;
 779                 policy_add(rule_policy, pol_auto, val, pol_metadata, superlist[i]->name, NULL);
 780                 seen[i] = 1;
 781         }
 782         for (i = 0; i < super_cnt; i++)
 783                 if (!seen[i])
 784                         policy_add(rule_policy, pol_auto, dflt, pol_metadata, superlist[i]->name, NULL);
 785 }
 786
 787 int loaded = 0;
 788
 789 static char *conffile = NULL;
 790 void set_conffile(char *file)
 791 {
 792         conffile = file;
 793 }
 794
 795 void load_conffile(void)
 796 {
 797         FILE *f;
 798         char *line;
 799
 800         if (loaded) return;
 801         if (conffile == NULL)
 802                 conffile = DefaultConfFile;
 803
 804         if (strcmp(conffile, "none") == 0) {
 805                 loaded = 1;
 806                 return;
 807         }
 808         if (strcmp(conffile, "partitions")==0) {
 809                 char *list = dl_strdup("DEV");
 810                 dl_init(list);
 811                 dl_add(list, dl_strdup("partitions"));
 812                 devline(list);
 813                 free_line(list);
 814                 loaded = 1;
 815                 return;
 816         }
 817         f = fopen(conffile, "r");
 818         /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 819          * To allow Debian users to compile from clean source and still
 820          * have a working mdadm, we read /etc/mdadm/mdadm.conf
 821          * if /etc/mdadm.conf doesn't exist
 822          */
 823         if (f == NULL &&
 824             conffile == DefaultConfFile) {
 825                 f = fopen(DefaultAltConfFile, "r");
 826                 if (f)
 827                         conffile = DefaultAltConfFile;
 828         }
 829         if (f == NULL)
 830                 return;
 831
 832         loaded = 1;
 833         while ((line=conf_line(f))) {
 834                 switch(match_keyword(line)) {
 835                 case Devices:
 836                         devline(line);
 837                         break;
 838                 case Array:
 839                         arrayline(line);
 840                         break;
 841                 case Mailaddr:
 842                         mailline(line);
 843                         break;
 844                 case Mailfrom:
 845                         mailfromline(line);
 846                         break;
 847                 case Program:
 848                         programline(line);
 849                         break;
 850                 case CreateDev:
 851                         createline(line);
 852                         break;
 853                 case Homehost:
 854                         homehostline(line);
 855                         break;
 856                 case AutoMode:
 857                         autoline(line);
 858                         break;
 859                 case Policy:
 860                         policyline(line, rule_policy);
 861                         break;
 862                 case PartPolicy:
 863                         policyline(line, rule_part);
 864                         break;
 865                 default:
 866                         fprintf(stderr, Name ": Unknown keyword %s\n", line);
 867                 }
 868                 free_line(line);
 869         }
 870
 871         fclose(f);
 872
 873 /*    printf("got file\n"); */
 874 }
 875
 876 char *conf_get_mailaddr(void)
 877 {
 878         load_conffile();
 879         return alert_email;
 880 }
 881
 882 char *conf_get_mailfrom(void)
 883 {
 884         load_conffile();
 885         return alert_mail_from;
 886 }
 887
 888 char *conf_get_program(void)
 889 {
 890         load_conffile();
 891         return alert_program;
 892 }
 893
 894 char *conf_get_homehost(int *require_homehostp)
 895 {
 896         load_conffile();
 897         if (require_homehostp)
 898                 *require_homehostp = require_homehost;
 899         return home_host;
 900 }
 901
 902 struct createinfo *conf_get_create_info(void)
 903 {
 904         load_conffile();
 905         return &createinfo;
 906 }
 907
 908 struct mddev_ident *conf_get_ident(char *dev)
 909 {
 910         struct mddev_ident *rv;
 911         load_conffile();
 912         rv = mddevlist;
 913         while (dev && rv && (rv->devname == NULL
 914                              || !devname_matches(dev, rv->devname)))
 915                 rv = rv->next;
 916         return rv;
 917 }
 918
 919 static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
 920 {
 921         while (*dlp)
 922                 dlp = &(*dlp)->next;
 923         *dlp = list;
 924 }
 925
 926 struct mddev_dev *conf_get_devs()
 927 {
 928         glob_t globbuf;
 929         struct conf_dev *cd;
 930         int flags = 0;
 931         static struct mddev_dev *dlist = NULL;
 932         unsigned int i;
 933
 934         while (dlist) {
 935                 struct mddev_dev *t = dlist;
 936                 dlist = dlist->next;
 937                 free(t->devname);
 938                 free(t);
 939         }
 940
 941         load_conffile();
 942
 943         if (cdevlist == NULL) {
 944                 /* default to 'partitions' and 'containers' */
 945                 dlist = load_partitions();
 946                 append_dlist(&dlist, load_containers());
 947         }
 948
 949         for (cd=cdevlist; cd; cd=cd->next) {
 950                 if (strcasecmp(cd->name, "partitions")==0)
 951                         append_dlist(&dlist, load_partitions());
 952                 else if (strcasecmp(cd->name, "containers")==0)
 953                         append_dlist(&dlist, load_containers());
 954                 else {
 955                         glob(cd->name, flags, NULL, &globbuf);
 956                         flags |= GLOB_APPEND;
 957                 }
 958         }
 959         if (flags & GLOB_APPEND) {
 960                 for (i=0; i<globbuf.gl_pathc; i++) {
 961                         struct mddev_dev *t = malloc(sizeof(*t));
 962                         t->devname = strdup(globbuf.gl_pathv[i]);
 963                         t->next = dlist;
 964                         t->used = 0;
 965                         dlist = t;
 966 /*      printf("one dev is %s\n", t->devname);*/
 967                 }
 968                 globfree(&globbuf);
 969         }
 970
 971         return dlist;
 972 }
 973
 974 int conf_test_dev(char *devname)
 975 {
 976         struct conf_dev *cd;
 977         if (cdevlist == NULL)
 978                 /* allow anything by default */
 979                 return 1;
 980         for (cd = cdevlist ; cd ; cd = cd->next) {
 981                 if (strcasecmp(cd->name, "partitions") == 0)
 982                         return 1;
 983                 if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
 984                         return 1;
 985         }
 986         return 0;
 987 }
 988
 989 int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
 990 {
 991         /* If anyone said 'yes', that sticks.
 992          * else if homehost applies, use that
 993          * else if there is a 'no', say 'no'.
 994          * else 'yes'.
 995          */
 996         struct dev_policy *p;
 997         int no=0, found_auto=0;
 998         load_conffile();
 999
1000         pol = pol_find(pol, pol_auto);
1001         pol_for_each(p, pol, version) {
1002                 if (strcmp(p->value, "yes") == 0)
1003                         return 1;
1004                 if (strcmp(p->value, "auto") == 0)
1005                         found_auto = 1;
1006                 if (strcmp(p->value, "no") == 0)
1007                         no = 1;
1008         }
1009         if (is_homehost && found_auto)
1010                 return 1;
1011         if (no)
1012                 return 0;
1013         return 1;
1014 }
1015
1016 int match_oneof(char *devices, char *devname)
1017 {
1018     /* check if one of the comma separated patterns in devices
1019      * matches devname
1020      */
1021
1022     while (devices && *devices) {
1023         char patn[1024];
1024         char *p = devices;
1025         devices = strchr(devices, ',');
1026         if (!devices)
1027             devices = p + strlen(p);
1028         if (devices-p < 1024) {
1029                 strncpy(patn, p, devices-p);
1030                 patn[devices-p] = 0;
1031                 if (fnmatch(patn, devname, FNM_PATHNAME)==0)
1032                         return 1;
1033         }
1034         if (*devices == ',')
1035                 devices++;
1036     }
1037     return 0;
1038 }
1039
1040 int devname_matches(char *name, char *match)
1041 {
1042         /* See if the given array name matches the
1043          * given match from config file.
1044          *
1045          * First strip and /dev/md/ or /dev/, then
1046          * see if there might be a numeric match of
1047          *  mdNN with NN
1048          * then just strcmp
1049          */
1050         if (strncmp(name, "/dev/md/", 8) == 0)
1051                 name += 8;
1052         else if (strncmp(name, "/dev/", 5) == 0)
1053                 name += 5;
1054
1055         if (strncmp(match, "/dev/md/", 8) == 0)
1056                 match += 8;
1057         else if (strncmp(match, "/dev/", 5) == 0)
1058                 match += 5;
1059
1060
1061         if (strncmp(name, "md", 2) == 0 &&
1062             isdigit(name[2]))
1063                 name += 2;
1064         if (strncmp(match, "md", 2) == 0 &&
1065             isdigit(match[2]))
1066                 match += 2;
1067
1068         return (strcmp(name, match) == 0);
1069 }
1070
1071 int conf_name_is_free(char *name)
1072 {
1073         /* Check if this name is already take by an ARRAY entry in
1074          * the config file.
1075          * It can be taken either by a match on devname, name, or
1076          * even super-minor.
1077          */
1078         struct mddev_ident *dev;
1079
1080         load_conffile();
1081         for (dev = mddevlist; dev; dev = dev->next) {
1082                 char nbuf[100];
1083                 if (dev->devname && devname_matches(name, dev->devname))
1084                         return 0;
1085                 if (dev->name[0] && devname_matches(name, dev->name))
1086                         return 0;
1087                 sprintf(nbuf, "%d", dev->super_minor);
1088                 if (dev->super_minor != UnSet &&
1089                     devname_matches(name, nbuf))
1090                         return 0;
1091         }
1092         return 1;
1093 }
1094
1095 struct mddev_ident *conf_match(struct mdinfo *info, struct supertype *st)
1096 {
1097         struct mddev_ident *array_list, *match;
1098         int verbose = 0;
1099         char *devname = NULL;
1100         array_list = conf_get_ident(NULL);
1101         match = NULL;
1102         for (; array_list; array_list = array_list->next) {
1103                 if (array_list->uuid_set &&
1104                     same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid)
1105                     == 0) {
1106                         if (verbose >= 2 && array_list->devname)
1107                                 fprintf(stderr, Name
1108                                         ": UUID differs from %s.\n",
1109                                         array_list->devname);
1110                         continue;
1111                 }
1112                 if (array_list->name[0] &&
1113                     strcasecmp(array_list->name, info->name) != 0) {
1114                         if (verbose >= 2 && array_list->devname)
1115                                 fprintf(stderr, Name
1116                                         ": Name differs from %s.\n",
1117                                         array_list->devname);
1118                         continue;
1119                 }
1120                 if (array_list->devices && devname &&
1121                     !match_oneof(array_list->devices, devname)) {
1122                         if (verbose >= 2 && array_list->devname)
1123                                 fprintf(stderr, Name
1124                                         ": Not a listed device for %s.\n",
1125                                         array_list->devname);
1126                         continue;
1127                 }
1128                 if (array_list->super_minor != UnSet &&
1129                     array_list->super_minor != info->array.md_minor) {
1130                         if (verbose >= 2 && array_list->devname)
1131                                 fprintf(stderr, Name
1132                                         ": Different super-minor to %s.\n",
1133                                         array_list->devname);
1134                         continue;
1135                 }
1136                 if (!array_list->uuid_set &&
1137                     !array_list->name[0] &&
1138                     !array_list->devices &&
1139                     array_list->super_minor == UnSet) {
1140                         if (verbose >= 2 && array_list->devname)
1141                                 fprintf(stderr, Name
1142                              ": %s doesn't have any identifying information.\n",
1143                                         array_list->devname);
1144                         continue;
1145                 }
1146                 /* FIXME, should I check raid_disks and level too?? */
1147
1148                 if (match) {
1149                         if (verbose >= 0) {
1150                                 if (match->devname && array_list->devname)
1151                                         fprintf(stderr, Name
1152                    ": we match both %s and %s - cannot decide which to use.\n",
1153                                                 match->devname, array_list->devname);
1154                                 else
1155                                         fprintf(stderr, Name
1156                                                 ": multiple lines in mdadm.conf match\n");
1157                         }
1158                         return NULL;
1159                 }
1160                 match = array_list;
1161         }
1162         return match;
1163 }