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                 pr_err("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 = xmalloc(sizeof(*d));
 182                 d->devname = xstrdup(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 = xmalloc(sizeof(*d));
 206                         if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
 207                                 free(d);
 208                                 continue;
 209                         }
 210                         d->next = rv;
 211                         d->used = 0;
 212                         rv = d;
 213                 }
 214         free_mdstat(mdstat);
 215
 216         return rv;
 217 }
 218
 219 struct createinfo createinfo = {
 220         .autof = 2, /* by default, create devices with standard names */
 221         .symlinks = 1,
 222 #ifdef DEBIAN
 223         .gid = 6, /* disk */
 224         .mode = 0660,
 225 #else
 226         .mode = 0600,
 227 #endif
 228 };
 229
 230 int parse_auto(char *str, char *msg, int config)
 231 {
 232         int autof;
 233         if (str == NULL || *str == 0)
 234                 autof = 2;
 235         else if (strcasecmp(str,"no")==0)
 236                 autof = 1;
 237         else if (strcasecmp(str,"yes")==0)
 238                 autof = 2;
 239         else if (strcasecmp(str,"md")==0)
 240                 autof = config?5:3;
 241         else {
 242                 /* There might be digits, and maybe a hypen, at the end */
 243                 char *e = str + strlen(str);
 244                 int num = 4;
 245                 int len;
 246                 while (e > str && isdigit(e[-1]))
 247                         e--;
 248                 if (*e) {
 249                         num = atoi(e);
 250                         if (num <= 0) num = 1;
 251                 }
 252                 if (e > str && e[-1] == '-')
 253                         e--;
 254                 len = e - str;
 255                 if ((len == 2 && strncasecmp(str,"md",2)==0)) {
 256                         autof = config ? 5 : 3;
 257                 } else if ((len == 3 && strncasecmp(str,"yes",3)==0)) {
 258                         autof = 2;
 259                 } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
 260                         autof = config ? 6 : 4;
 261                 } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
 262                            (len >= 4 && strncasecmp(str,"part",4)==0)) {
 263                         autof = 6;
 264                 } else {
 265                         pr_err("%s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 266                                 "        optionally followed by a number.\n",
 267                                 msg, str);
 268                         exit(2);
 269                 }
 270                 autof |= num << 3;
 271         }
 272         return autof;
 273 }
 274
 275 static void createline(char *line)
 276 {
 277         char *w;
 278         char *ep;
 279
 280         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 281                 if (strncasecmp(w, "auto=", 5) == 0)
 282                         createinfo.autof = parse_auto(w+5, "auto=", 1);
 283                 else if (strncasecmp(w, "owner=", 6) == 0) {
 284                         if (w[6] == 0) {
 285                                 pr_err("missing owner name\n");
 286                                 continue;
 287                         }
 288                         createinfo.uid = strtoul(w+6, &ep, 10);
 289                         if (*ep != 0) {
 290                                 struct passwd *pw;
 291                                 /* must be a name */
 292                                 pw = getpwnam(w+6);
 293                                 if (pw)
 294                                         createinfo.uid = pw->pw_uid;
 295                                 else
 296                                         pr_err("CREATE user %s not found\n", w+6);
 297                         }
 298                 } else if (strncasecmp(w, "group=", 6) == 0) {
 299                         if (w[6] == 0) {
 300                                 pr_err("missing group name\n");
 301                                 continue;
 302                         }
 303                         createinfo.gid = strtoul(w+6, &ep, 10);
 304                         if (*ep != 0) {
 305                                 struct group *gr;
 306                                 /* must be a name */
 307                                 gr = getgrnam(w+6);
 308                                 if (gr)
 309                                         createinfo.gid = gr->gr_gid;
 310                                 else
 311                                         pr_err("CREATE group %s not found\n", w+6);
 312                         }
 313                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 314                         if (w[5] == 0) {
 315                                 pr_err("missing CREATE mode\n");
 316                                 continue;
 317                         }
 318                         createinfo.mode = strtoul(w+5, &ep, 8);
 319                         if (*ep != 0) {
 320                                 createinfo.mode = 0600;
 321                                 pr_err("unrecognised CREATE mode %s\n",
 322                                         w+5);
 323                         }
 324                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 325                         /* style of metadata to use by default */
 326                         int i;
 327                         for (i=0; superlist[i] && !createinfo.supertype; i++)
 328                                 createinfo.supertype =
 329                                         superlist[i]->match_metadata_desc(w+9);
 330                         if (!createinfo.supertype)
 331                                 pr_err("metadata format %s unknown, ignoring\n",
 332                                         w+9);
 333                 } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
 334                         createinfo.symlinks = 1;
 335                 else if  (strncasecmp(w, "symlinks=no", 11) == 0)
 336                         createinfo.symlinks = 0;
 337                 else {
 338                         pr_err("unrecognised word on CREATE line: %s\n",
 339                                 w);
 340                 }
 341         }
 342 }
 343
 344 void devline(char *line)
 345 {
 346         char *w;
 347         struct conf_dev *cd;
 348
 349         for (w=dl_next(line); w != line; w=dl_next(w)) {
 350                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
 351                     strcasecmp(w, "containers") == 0) {
 352                         cd = xmalloc(sizeof(*cd));
 353                         cd->name = xstrdup(w);
 354                         cd->next = cdevlist;
 355                         cdevlist = cd;
 356                 } else {
 357                         pr_err("unreconised word on DEVICE line: %s\n",
 358                                 w);
 359                 }
 360         }
 361 }
 362
 363 struct mddev_ident *mddevlist = NULL;
 364 struct mddev_ident **mddevlp = &mddevlist;
 365
 366 static int is_number(char *w)
 367 {
 368         /* check if there are 1 or more digits and nothing else */
 369         int digits = 0;
 370         while (*w && isdigit(*w)) {
 371                 digits++;
 372                 w++;
 373         }
 374         return (digits && ! *w);
 375 }
 376
 377 void arrayline(char *line)
 378 {
 379         char *w;
 380
 381         struct mddev_ident mis;
 382         struct mddev_ident *mi;
 383
 384         mis.uuid_set = 0;
 385         mis.super_minor = UnSet;
 386         mis.level = UnSet;
 387         mis.raid_disks = UnSet;
 388         mis.spare_disks = 0;
 389         mis.devices = NULL;
 390         mis.devname = NULL;
 391         mis.spare_group = NULL;
 392         mis.autof = 0;
 393         mis.next = NULL;
 394         mis.st = NULL;
 395         mis.bitmap_fd = -1;
 396         mis.bitmap_file = NULL;
 397         mis.name[0] = 0;
 398         mis.container = NULL;
 399         mis.member = NULL;
 400
 401         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 402                 if (w[0] == '/' || strchr(w, '=') == NULL) {
 403                         /* This names the device, or is '<ignore>'.
 404                          * The rules match those in create_mddev.
 405                          * 'w' must be:
 406                          *  /dev/md/{anything}
 407                          *  /dev/mdNN
 408                          *  /dev/md_dNN
 409                          *  <ignore>
 410                          *  or anything that doesn't start '/' or '<'
 411                          */
 412                         if (strcasecmp(w, "<ignore>") == 0 ||
 413                             strncmp(w, "/dev/md/", 8) == 0 ||
 414                             (w[0] != '/' && w[0] != '<') ||
 415                             (strncmp(w, "/dev/md", 7) == 0 &&
 416                              is_number(w+7)) ||
 417                             (strncmp(w, "/dev/md_d", 9) == 0 &&
 418                              is_number(w+9))
 419                                 ) {
 420                                 /* This is acceptable */;
 421                                 if (mis.devname)
 422                                         pr_err("only give one "
 423                                                 "device per ARRAY line: %s and %s\n",
 424                                                 mis.devname, w);
 425                                 else
 426                                         mis.devname = w;
 427                         }else {
 428                                 pr_err("%s is an invalid name for "
 429                                         "an md device - ignored.\n", w);
 430                         }
 431                 } else if (strncasecmp(w, "uuid=", 5)==0 ) {
 432                         if (mis.uuid_set)
 433                                 pr_err("only specify uuid once, %s ignored.\n",
 434                                         w);
 435                         else {
 436                                 if (parse_uuid(w+5, mis.uuid))
 437                                         mis.uuid_set = 1;
 438                                 else
 439                                         pr_err("bad uuid: %s\n", w);
 440                         }
 441                 } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
 442                         if (mis.super_minor != UnSet)
 443                                 pr_err("only specify super-minor once, %s ignored.\n",
 444                                         w);
 445                         else {
 446                                 char *endptr;
 447                                 int minor = strtol(w+12, &endptr, 10);
 448
 449                                 if (w[12]==0 || endptr[0]!=0 || minor < 0)
 450                                         pr_err("invalid super-minor number: %s\n",
 451                                                 w);
 452                                 else
 453                                         mis.super_minor = minor;
 454                         }
 455                 } else if (strncasecmp(w, "name=", 5)==0) {
 456                         if (mis.name[0])
 457                                 pr_err("only specify name once, %s ignored.\n",
 458                                         w);
 459                         else if (strlen(w+5) > 32)
 460                                 pr_err("name too long, ignoring %s\n", w);
 461                         else
 462                                 strcpy(mis.name, w+5);
 463
 464                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 465                         if (mis.bitmap_file)
 466                                 pr_err("only specify bitmap file once. %s ignored\n",
 467                                         w);
 468                         else
 469                                 mis.bitmap_file = xstrdup(w+7);
 470
 471                 } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
 472                         if (mis.devices)
 473                                 pr_err("only specify devices once (use a comma separated list). %s ignored\n",
 474                                         w);
 475                         else
 476                                 mis.devices = xstrdup(w+8);
 477                 } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
 478                         if (mis.spare_group)
 479                                 pr_err("only specify one spare group per array. %s ignored.\n",
 480                                         w);
 481                         else
 482                                 mis.spare_group = xstrdup(w+12);
 483                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 484                         /* this is mainly for compatability with --brief output */
 485                         mis.level = map_name(pers, w+6);
 486                 } else if (strncasecmp(w, "disks=", 6) == 0 ) {
 487                         /* again, for compat */
 488                         mis.raid_disks = atoi(w+6);
 489                 } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
 490                         /* again, for compat */
 491                         mis.raid_disks = atoi(w+12);
 492                 } else if (strncasecmp(w, "spares=", 7) == 0 ) {
 493                         /* for warning if not all spares present */
 494                         mis.spare_disks = atoi(w+7);
 495                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 496                         /* style of metadata on the devices. */
 497                         int i;
 498
 499                         for(i=0; superlist[i] && !mis.st; i++)
 500                                 mis.st = superlist[i]->match_metadata_desc(w+9);
 501
 502                         if (!mis.st)
 503                                 pr_err("metadata format %s unknown, ignored.\n", w+9);
 504                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 505                         /* whether to create device special files as needed */
 506                         mis.autof = parse_auto(w+5, "auto type", 0);
 507                 } else if (strncasecmp(w, "member=", 7) == 0) {
 508                         /* subarray within a container */
 509                         mis.member = xstrdup(w+7);
 510                 } else if (strncasecmp(w, "container=", 10) == 0) {
 511                         /* the container holding this subarray.  Either a device name
 512                          * or a uuid */
 513                         mis.container = xstrdup(w+10);
 514                 } else {
 515                         pr_err("unrecognised word on ARRAY line: %s\n",
 516                                 w);
 517                 }
 518         }
 519         if (mis.uuid_set == 0 && mis.devices == NULL &&
 520             mis.super_minor == UnSet && mis.name[0] == 0 &&
 521             (mis.container == NULL || mis.member == NULL))
 522                 pr_err("ARRAY line %s has no identity information.\n", mis.devname);
 523         else {
 524                 mi = xmalloc(sizeof(*mi));
 525                 *mi = mis;
 526                 mi->devname = mis.devname ? xstrdup(mis.devname) : NULL;
 527                 mi->next = NULL;
 528                 *mddevlp = mi;
 529                 mddevlp = &mi->next;
 530         }
 531 }
 532
 533 static char *alert_email = NULL;
 534 void mailline(char *line)
 535 {
 536         char *w;
 537
 538         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 539                 if (alert_email == NULL)
 540                         alert_email = xstrdup(w);
 541                 else
 542                         pr_err("excess address on MAIL line: %s - ignored\n",
 543                                 w);
 544         }
 545 }
 546
 547 static char *alert_mail_from = NULL;
 548 void mailfromline(char *line)
 549 {
 550         char *w;
 551
 552         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 553                 if (alert_mail_from == NULL)
 554                         alert_mail_from = xstrdup(w);
 555                 else {
 556                         char *t = NULL;
 557
 558                         if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
 559                                 free(alert_mail_from);
 560                                 alert_mail_from = t;
 561                         }
 562                 }
 563         }
 564 }
 565
 566
 567 static char *alert_program = NULL;
 568 void programline(char *line)
 569 {
 570         char *w;
 571
 572         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 573                 if (alert_program == NULL)
 574                         alert_program = xstrdup(w);
 575                 else
 576                         pr_err("excess program on PROGRAM line: %s - ignored\n",
 577                                 w);
 578         }
 579 }
 580
 581 static char *home_host = NULL;
 582 static int require_homehost = 1;
 583 void homehostline(char *line)
 584 {
 585         char *w;
 586
 587         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 588                 if (strcasecmp(w, "<ignore>")==0)
 589                         require_homehost = 0;
 590                 else if (home_host == NULL) {
 591                         if (strcasecmp(w, "<none>")==0)
 592                                 home_host = xstrdup("");
 593                         else
 594                                 home_host = xstrdup(w);
 595                 }else
 596                         pr_err("excess host name on HOMEHOST line: %s - ignored\n",
 597                                 w);
 598         }
 599 }
 600
 601 char auto_yes[] = "yes";
 602 char auto_no[] = "no";
 603 char auto_homehost[] = "homehost";
 604
 605 static int auto_seen = 0;
 606 void autoline(char *line)
 607 {
 608         char *w;
 609         char *seen;
 610         int super_cnt;
 611         char *dflt = auto_yes;
 612         int homehost = 0;
 613         int i;
 614
 615         if (auto_seen) {
 616                 pr_err("AUTO line may only be give once."
 617                         "  Subsequent lines ignored\n");
 618                 return;
 619         }
 620         /* Parse the 'auto' line creating policy statements for the 'auto' policy.
 621          *
 622          * The default is 'yes' but the 'auto' line might over-ride that.
 623          * Words in the line are processed in order with the first
 624          * match winning.
 625          * word can be:
 626          *   +version   - that version can be assembled
 627          *   -version   - that version cannot be auto-assembled
 628          *   yes or +all - any other version can be assembled
 629          *   no or -all  - no other version can be assembled.
 630          *   homehost   - any array associated by 'homehost' to this
 631          *                host can be assembled.
 632          *
 633          * Thus:
 634          *   +ddf -0.90 homehost -all
 635          * will auto-assemble any ddf array, no 0.90 array, and
 636          * any other array (imsm, 1.x) if and only if it is identified
 637          * as belonging to this host.
 638          *
 639          * We translate that to policy by creating 'auto=yes' when we see
 640          * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
 641          * or 'auto=homehost' if we see '-version' after 'homehost'.
 642          * When we see yes, no, +all or -all we stop and any version that hasn't
 643          * been seen gets an appropriate auto= entry.
 644          */
 645
 646         for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
 647                 ;
 648         seen = xcalloc(super_cnt, 1);
 649
 650         for (w = dl_next(line); w != line ; w = dl_next(w)) {
 651                 char *val;
 652
 653                 if (strcasecmp(w, "yes") == 0) {
 654                         dflt = auto_yes;
 655                         break;
 656                 }
 657                 if (strcasecmp(w, "no") == 0) {
 658                         if (homehost)
 659                                 dflt = auto_homehost;
 660                         else
 661                                 dflt = auto_no;
 662                         break;
 663                 }
 664                 if (strcasecmp(w, "homehost") == 0) {
 665                         homehost = 1;
 666                         continue;
 667                 }
 668                 if (w[0] == '+')
 669                         val = auto_yes;
 670                 else if (w[0] == '-') {
 671                         if (homehost)
 672                                 val = auto_homehost;
 673                         else
 674                                 val = auto_no;
 675                 } else
 676                         continue;
 677
 678                 if (strcasecmp(w+1, "all") == 0) {
 679                         dflt = val;
 680                         break;
 681                 }
 682                 for (i = 0; superlist[i]; i++) {
 683                         const char *version = superlist[i]->name;
 684                         if (strcasecmp(w+1, version) == 0)
 685                                 break;
 686                         /* 1 matches 1.x, 0 matches 0.90 */
 687                         if (version[1] == '.' &&
 688                             strlen(w+1) == 1 &&
 689                             w[1] == version[0])
 690                                 break;
 691                         /* 1.anything matches 1.x */
 692                         if (strcmp(version, "1.x") == 0 &&
 693                             strncmp(w+1, "1.", 2) == 0)
 694                                 break;
 695                 }
 696                 if (superlist[i] == NULL)
 697                         /* ignore this word */
 698                         continue;
 699                 if (seen[i])
 700                         /* already know about this metadata */
 701                         continue;
 702                 policy_add(rule_policy, pol_auto, val, pol_metadata, superlist[i]->name, NULL);
 703                 seen[i] = 1;
 704         }
 705         for (i = 0; i < super_cnt; i++)
 706                 if (!seen[i])
 707                         policy_add(rule_policy, pol_auto, dflt, pol_metadata, superlist[i]->name, NULL);
 708
 709         free(seen);
 710 }
 711
 712 int loaded = 0;
 713
 714 static char *conffile = NULL;
 715 void set_conffile(char *file)
 716 {
 717         conffile = file;
 718 }
 719
 720 void load_conffile(void)
 721 {
 722         FILE *f;
 723         char *line;
 724
 725         if (loaded) return;
 726         if (conffile == NULL)
 727                 conffile = DefaultConfFile;
 728
 729         if (strcmp(conffile, "none") == 0) {
 730                 loaded = 1;
 731                 return;
 732         }
 733         if (strcmp(conffile, "partitions")==0) {
 734                 char *list = dl_strdup("DEV");
 735                 dl_init(list);
 736                 dl_add(list, dl_strdup("partitions"));
 737                 devline(list);
 738                 free_line(list);
 739                 loaded = 1;
 740                 return;
 741         }
 742         f = fopen(conffile, "r");
 743         /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 744          * To allow Debian users to compile from clean source and still
 745          * have a working mdadm, we read /etc/mdadm/mdadm.conf
 746          * if /etc/mdadm.conf doesn't exist
 747          */
 748         if (f == NULL &&
 749             conffile == DefaultConfFile) {
 750                 f = fopen(DefaultAltConfFile, "r");
 751                 if (f)
 752                         conffile = DefaultAltConfFile;
 753         }
 754         if (f == NULL)
 755                 return;
 756
 757         loaded = 1;
 758         while ((line=conf_line(f))) {
 759                 switch(match_keyword(line)) {
 760                 case Devices:
 761                         devline(line);
 762                         break;
 763                 case Array:
 764                         arrayline(line);
 765                         break;
 766                 case Mailaddr:
 767                         mailline(line);
 768                         break;
 769                 case Mailfrom:
 770                         mailfromline(line);
 771                         break;
 772                 case Program:
 773                         programline(line);
 774                         break;
 775                 case CreateDev:
 776                         createline(line);
 777                         break;
 778                 case Homehost:
 779                         homehostline(line);
 780                         break;
 781                 case AutoMode:
 782                         autoline(line);
 783                         break;
 784                 case Policy:
 785                         policyline(line, rule_policy);
 786                         break;
 787                 case PartPolicy:
 788                         policyline(line, rule_part);
 789                         break;
 790                 default:
 791                         pr_err("Unknown keyword %s\n", line);
 792                 }
 793                 free_line(line);
 794         }
 795
 796         fclose(f);
 797
 798 /*    printf("got file\n"); */
 799 }
 800
 801 char *conf_get_mailaddr(void)
 802 {
 803         load_conffile();
 804         return alert_email;
 805 }
 806
 807 char *conf_get_mailfrom(void)
 808 {
 809         load_conffile();
 810         return alert_mail_from;
 811 }
 812
 813 char *conf_get_program(void)
 814 {
 815         load_conffile();
 816         return alert_program;
 817 }
 818
 819 char *conf_get_homehost(int *require_homehostp)
 820 {
 821         load_conffile();
 822         if (require_homehostp)
 823                 *require_homehostp = require_homehost;
 824         return home_host;
 825 }
 826
 827 struct createinfo *conf_get_create_info(void)
 828 {
 829         load_conffile();
 830         return &createinfo;
 831 }
 832
 833 struct mddev_ident *conf_get_ident(char *dev)
 834 {
 835         struct mddev_ident *rv;
 836         load_conffile();
 837         rv = mddevlist;
 838         while (dev && rv && (rv->devname == NULL
 839                              || !devname_matches(dev, rv->devname)))
 840                 rv = rv->next;
 841         return rv;
 842 }
 843
 844 static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
 845 {
 846         while (*dlp)
 847                 dlp = &(*dlp)->next;
 848         *dlp = list;
 849 }
 850
 851 struct mddev_dev *conf_get_devs()
 852 {
 853         glob_t globbuf;
 854         struct conf_dev *cd;
 855         int flags = 0;
 856         static struct mddev_dev *dlist = NULL;
 857         unsigned int i;
 858
 859         while (dlist) {
 860                 struct mddev_dev *t = dlist;
 861                 dlist = dlist->next;
 862                 free(t->devname);
 863                 free(t);
 864         }
 865
 866         load_conffile();
 867
 868         if (cdevlist == NULL) {
 869                 /* default to 'partitions' and 'containers' */
 870                 dlist = load_partitions();
 871                 append_dlist(&dlist, load_containers());
 872         }
 873
 874         for (cd=cdevlist; cd; cd=cd->next) {
 875                 if (strcasecmp(cd->name, "partitions")==0)
 876                         append_dlist(&dlist, load_partitions());
 877                 else if (strcasecmp(cd->name, "containers")==0)
 878                         append_dlist(&dlist, load_containers());
 879                 else {
 880                         glob(cd->name, flags, NULL, &globbuf);
 881                         flags |= GLOB_APPEND;
 882                 }
 883         }
 884         if (flags & GLOB_APPEND) {
 885                 for (i=0; i<globbuf.gl_pathc; i++) {
 886                         struct mddev_dev *t = xmalloc(sizeof(*t));
 887                         t->devname = xstrdup(globbuf.gl_pathv[i]);
 888                         t->next = dlist;
 889                         t->used = 0;
 890                         dlist = t;
 891 /*      printf("one dev is %s\n", t->devname);*/
 892                 }
 893                 globfree(&globbuf);
 894         }
 895
 896         return dlist;
 897 }
 898
 899 int conf_test_dev(char *devname)
 900 {
 901         struct conf_dev *cd;
 902         if (cdevlist == NULL)
 903                 /* allow anything by default */
 904                 return 1;
 905         for (cd = cdevlist ; cd ; cd = cd->next) {
 906                 if (strcasecmp(cd->name, "partitions") == 0)
 907                         return 1;
 908                 if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
 909                         return 1;
 910         }
 911         return 0;
 912 }
 913
 914 int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
 915 {
 916         /* If anyone said 'yes', that sticks.
 917          * else if homehost applies, use that
 918          * else if there is a 'no', say 'no'.
 919          * else 'yes'.
 920          */
 921         struct dev_policy *p;
 922         int no=0, found_homehost=0;
 923         load_conffile();
 924
 925         pol = pol_find(pol, pol_auto);
 926         pol_for_each(p, pol, version) {
 927                 if (strcmp(p->value, "yes") == 0)
 928                         return 1;
 929                 if (strcmp(p->value, "homehost") == 0)
 930                         found_homehost = 1;
 931                 if (strcmp(p->value, "no") == 0)
 932                         no = 1;
 933         }
 934         if (is_homehost && found_homehost)
 935                 return 1;
 936         if (no)
 937                 return 0;
 938         return 1;
 939 }
 940
 941 int match_oneof(char *devices, char *devname)
 942 {
 943     /* check if one of the comma separated patterns in devices
 944      * matches devname
 945      */
 946
 947     while (devices && *devices) {
 948         char patn[1024];
 949         char *p = devices;
 950         devices = strchr(devices, ',');
 951         if (!devices)
 952             devices = p + strlen(p);
 953         if (devices-p < 1024) {
 954                 strncpy(patn, p, devices-p);
 955                 patn[devices-p] = 0;
 956                 if (fnmatch(patn, devname, FNM_PATHNAME)==0)
 957                         return 1;
 958         }
 959         if (*devices == ',')
 960                 devices++;
 961     }
 962     return 0;
 963 }
 964
 965 int devname_matches(char *name, char *match)
 966 {
 967         /* See if the given array name matches the
 968          * given match from config file.
 969          *
 970          * First strip and /dev/md/ or /dev/, then
 971          * see if there might be a numeric match of
 972          *  mdNN with NN
 973          * then just strcmp
 974          */
 975         if (strncmp(name, "/dev/md/", 8) == 0)
 976                 name += 8;
 977         else if (strncmp(name, "/dev/", 5) == 0)
 978                 name += 5;
 979
 980         if (strncmp(match, "/dev/md/", 8) == 0)
 981                 match += 8;
 982         else if (strncmp(match, "/dev/", 5) == 0)
 983                 match += 5;
 984
 985
 986         if (strncmp(name, "md", 2) == 0 &&
 987             isdigit(name[2]))
 988                 name += 2;
 989         if (strncmp(match, "md", 2) == 0 &&
 990             isdigit(match[2]))
 991                 match += 2;
 992
 993         return (strcmp(name, match) == 0);
 994 }
 995
 996 int conf_name_is_free(char *name)
 997 {
 998         /* Check if this name is already take by an ARRAY entry in
 999          * the config file.
1000          * It can be taken either by a match on devname, name, or
1001          * even super-minor.
1002          */
1003         struct mddev_ident *dev;
1004
1005         load_conffile();
1006         for (dev = mddevlist; dev; dev = dev->next) {
1007                 char nbuf[100];
1008                 if (dev->devname && devname_matches(name, dev->devname))
1009                         return 0;
1010                 if (dev->name[0] && devname_matches(name, dev->name))
1011                         return 0;
1012                 sprintf(nbuf, "%d", dev->super_minor);
1013                 if (dev->super_minor != UnSet &&
1014                     devname_matches(name, nbuf))
1015                         return 0;
1016         }
1017         return 1;
1018 }
1019
1020 struct mddev_ident *conf_match(struct supertype *st,
1021                                struct mdinfo *info,
1022                                char *devname,
1023                                int verbose, int *rvp)
1024 {
1025         struct mddev_ident *array_list, *match;
1026         array_list = conf_get_ident(NULL);
1027         match = NULL;
1028         for (; array_list; array_list = array_list->next) {
1029                 if (array_list->uuid_set &&
1030                     same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid)
1031                     == 0) {
1032                         if (verbose >= 2 && array_list->devname)
1033                                 pr_err("UUID differs from %s.\n",
1034                                        array_list->devname);
1035                         continue;
1036                 }
1037                 if (array_list->name[0] &&
1038                     strcasecmp(array_list->name, info->name) != 0) {
1039                         if (verbose >= 2 && array_list->devname)
1040                                 pr_err("Name differs from %s.\n",
1041                                        array_list->devname);
1042                         continue;
1043                 }
1044                 if (array_list->devices && devname &&
1045                     !match_oneof(array_list->devices, devname)) {
1046                         if (verbose >= 2 && array_list->devname)
1047                                 pr_err("Not a listed device for %s.\n",
1048                                        array_list->devname);
1049                         continue;
1050                 }
1051                 if (array_list->super_minor != UnSet &&
1052                     array_list->super_minor != info->array.md_minor) {
1053                         if (verbose >= 2 && array_list->devname)
1054                                 pr_err("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                                 pr_err("%s doesn't have any identifying"
1064                                        " 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                                         pr_err("we match both %s and %s - "
1074                                                "cannot decide which to use.\n",
1075                                                match->devname,
1076                                                array_list->devname);
1077                                 else
1078                                         pr_err("multiple lines in mdadm.conf"
1079                                                " match\n");
1080                         }
1081                         if (rvp)
1082                                 *rvp = 2;
1083                         match = NULL;
1084                         break;
1085                 }
1086                 match = array_list;
1087         }
1088         return match;
1089 }
1090
1091 int conf_verify_devnames(struct mddev_ident *array_list)
1092 {
1093         struct mddev_ident *a1, *a2;
1094
1095         for (a1 = array_list; a1; a1 = a1->next) {
1096                 if (!a1->devname)
1097                         continue;
1098                 for (a2 = a1->next; a2; a2 = a2->next) {
1099                         if (!a2->devname)
1100                                 continue;
1101                         if (strcmp(a1->devname, a2->devname) != 0)
1102                                 continue;
1103
1104                         if (a1->uuid_set && a2->uuid_set) {
1105                                 char nbuf[64];
1106                                 __fname_from_uuid(a1->uuid, 0, nbuf, ':');
1107                                 pr_err("Devices %s and ",
1108                                        nbuf);
1109                                 __fname_from_uuid(a2->uuid, 0, nbuf, ':');
1110                                 fprintf(stderr,
1111                                         "%s have the same name: %s\n",
1112                                         nbuf, a1->devname);
1113                         } else
1114                                 pr_err("Device %s given twice"
1115                                         " in config file\n", a1->devname);
1116                         return 1;
1117                 }
1118         }
1119
1120         return 0;
1121 }