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 struct conf_dev {
 112         struct conf_dev *next;
 113         char *name;
 114 } *cdevlist = NULL;
 115
 116 struct mddev_dev *load_partitions(void)
 117 {
 118         FILE *f = fopen("/proc/partitions", "r");
 119         char buf[1024];
 120         struct mddev_dev *rv = NULL;
 121         if (f == NULL) {
 122                 pr_err("cannot open /proc/partitions\n");
 123                 return NULL;
 124         }
 125         while (fgets(buf, 1024, f)) {
 126                 int major, minor;
 127                 char *name, *mp;
 128                 struct mddev_dev *d;
 129
 130                 buf[1023] = '\0';
 131                 if (buf[0] != ' ')
 132                         continue;
 133                 major = strtoul(buf, &mp, 10);
 134                 if (mp == buf || *mp != ' ')
 135                         continue;
 136                 minor = strtoul(mp, NULL, 10);
 137
 138                 name = map_dev(major, minor, 1);
 139                 if (!name)
 140                         continue;
 141                 d = xmalloc(sizeof(*d));
 142                 memset(d, 0, sizeof(*d));
 143                 d->devname = xstrdup(name);
 144                 d->next = rv;
 145                 rv = d;
 146         }
 147         fclose(f);
 148         return rv;
 149 }
 150
 151 struct mddev_dev *load_containers(void)
 152 {
 153         struct mdstat_ent *mdstat = mdstat_read(0, 0);
 154         struct mdstat_ent *ent;
 155         struct mddev_dev *d;
 156         struct mddev_dev *rv = NULL;
 157         struct map_ent *map = NULL, *me;
 158
 159         if (!mdstat)
 160                 return NULL;
 161
 162         for (ent = mdstat; ent; ent = ent->next)
 163                 if (ent->metadata_version &&
 164                     strncmp(ent->metadata_version, "external:", 9) == 0 &&
 165                     !is_subarray(&ent->metadata_version[9])) {
 166                         d = xmalloc(sizeof(*d));
 167                         memset(d, 0, sizeof(*d));
 168                         me = map_by_devnm(&map, ent->dev);
 169                         if (me)
 170                                 d->devname = xstrdup(me->path);
 171                         else if (asprintf(&d->devname, "/dev/%s", ent->dev) < 0) {
 172                                 free(d);
 173                                 continue;
 174                         }
 175                         d->next = rv;
 176                         rv = d;
 177                 }
 178         free_mdstat(mdstat);
 179         map_free(map);
 180
 181         return rv;
 182 }
 183
 184 struct createinfo createinfo = {
 185         .autof = 2, /* by default, create devices with standard names */
 186         .symlinks = 1,
 187         .names = 0, /* By default, stick with numbered md devices. */
 188 #ifdef DEBIAN
 189         .gid = 6, /* disk */
 190         .mode = 0660,
 191 #else
 192         .mode = 0600,
 193 #endif
 194 };
 195
 196 int parse_auto(char *str, char *msg, int config)
 197 {
 198         int autof;
 199         if (str == NULL || *str == 0)
 200                 autof = 2;
 201         else if (strcasecmp(str,"no")==0)
 202                 autof = 1;
 203         else if (strcasecmp(str,"yes")==0)
 204                 autof = 2;
 205         else if (strcasecmp(str,"md")==0)
 206                 autof = config?5:3;
 207         else {
 208                 /* There might be digits, and maybe a hypen, at the end */
 209                 char *e = str + strlen(str);
 210                 int num = 4;
 211                 int len;
 212                 while (e > str && isdigit(e[-1]))
 213                         e--;
 214                 if (*e) {
 215                         num = atoi(e);
 216                         if (num <= 0) num = 1;
 217                 }
 218                 if (e > str && e[-1] == '-')
 219                         e--;
 220                 len = e - str;
 221                 if ((len == 2 && strncasecmp(str,"md",2)==0)) {
 222                         autof = config ? 5 : 3;
 223                 } else if ((len == 3 && strncasecmp(str,"yes",3)==0)) {
 224                         autof = 2;
 225                 } else if ((len == 3 && strncasecmp(str,"mdp",3)==0)) {
 226                         autof = config ? 6 : 4;
 227                 } else if ((len == 1 && strncasecmp(str,"p",1)==0) ||
 228                            (len >= 4 && strncasecmp(str,"part",4)==0)) {
 229                         autof = 6;
 230                 } else {
 231                         pr_err("%s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 232                                 "        optionally followed by a number.\n",
 233                                 msg, str);
 234                         exit(2);
 235                 }
 236                 autof |= num << 3;
 237         }
 238         return autof;
 239 }
 240
 241 static void createline(char *line)
 242 {
 243         char *w;
 244         char *ep;
 245
 246         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 247                 if (strncasecmp(w, "auto=", 5) == 0)
 248                         createinfo.autof = parse_auto(w+5, "auto=", 1);
 249                 else if (strncasecmp(w, "owner=", 6) == 0) {
 250                         if (w[6] == 0) {
 251                                 pr_err("missing owner name\n");
 252                                 continue;
 253                         }
 254                         createinfo.uid = strtoul(w+6, &ep, 10);
 255                         if (*ep != 0) {
 256                                 struct passwd *pw;
 257                                 /* must be a name */
 258                                 pw = getpwnam(w+6);
 259                                 if (pw)
 260                                         createinfo.uid = pw->pw_uid;
 261                                 else
 262                                         pr_err("CREATE user %s not found\n", w+6);
 263                         }
 264                 } else if (strncasecmp(w, "group=", 6) == 0) {
 265                         if (w[6] == 0) {
 266                                 pr_err("missing group name\n");
 267                                 continue;
 268                         }
 269                         createinfo.gid = strtoul(w+6, &ep, 10);
 270                         if (*ep != 0) {
 271                                 struct group *gr;
 272                                 /* must be a name */
 273                                 gr = getgrnam(w+6);
 274                                 if (gr)
 275                                         createinfo.gid = gr->gr_gid;
 276                                 else
 277                                         pr_err("CREATE group %s not found\n", w+6);
 278                         }
 279                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 280                         if (w[5] == 0) {
 281                                 pr_err("missing CREATE mode\n");
 282                                 continue;
 283                         }
 284                         createinfo.mode = strtoul(w+5, &ep, 8);
 285                         if (*ep != 0) {
 286                                 createinfo.mode = 0600;
 287                                 pr_err("unrecognised CREATE mode %s\n",
 288                                         w+5);
 289                         }
 290                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 291                         /* style of metadata to use by default */
 292                         int i;
 293                         for (i=0; superlist[i] && !createinfo.supertype; i++)
 294                                 createinfo.supertype =
 295                                         superlist[i]->match_metadata_desc(w+9);
 296                         if (!createinfo.supertype)
 297                                 pr_err("metadata format %s unknown, ignoring\n",
 298                                         w+9);
 299                 } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
 300                         createinfo.symlinks = 1;
 301                 else if  (strncasecmp(w, "symlinks=no", 11) == 0)
 302                         createinfo.symlinks = 0;
 303                 else if (strncasecmp(w, "names=yes", 12) == 0)
 304                         createinfo.names = 1;
 305                 else if  (strncasecmp(w, "names=no", 11) == 0)
 306                         createinfo.names = 0;
 307                 else {
 308                         pr_err("unrecognised word on CREATE line: %s\n",
 309                                 w);
 310                 }
 311         }
 312 }
 313
 314 void devline(char *line)
 315 {
 316         char *w;
 317         struct conf_dev *cd;
 318
 319         for (w=dl_next(line); w != line; w=dl_next(w)) {
 320                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
 321                     strcasecmp(w, "containers") == 0) {
 322                         cd = xmalloc(sizeof(*cd));
 323                         cd->name = xstrdup(w);
 324                         cd->next = cdevlist;
 325                         cdevlist = cd;
 326                 } else {
 327                         pr_err("unreconised word on DEVICE line: %s\n",
 328                                 w);
 329                 }
 330         }
 331 }
 332
 333 struct mddev_ident *mddevlist = NULL;
 334 struct mddev_ident **mddevlp = &mddevlist;
 335
 336 static int is_number(char *w)
 337 {
 338         /* check if there are 1 or more digits and nothing else */
 339         int digits = 0;
 340         while (*w && isdigit(*w)) {
 341                 digits++;
 342                 w++;
 343         }
 344         return (digits && ! *w);
 345 }
 346
 347 void arrayline(char *line)
 348 {
 349         char *w;
 350
 351         struct mddev_ident mis;
 352         struct mddev_ident *mi;
 353
 354         mis.uuid_set = 0;
 355         mis.super_minor = UnSet;
 356         mis.level = UnSet;
 357         mis.raid_disks = UnSet;
 358         mis.spare_disks = 0;
 359         mis.devices = NULL;
 360         mis.devname = NULL;
 361         mis.spare_group = NULL;
 362         mis.autof = 0;
 363         mis.next = NULL;
 364         mis.st = NULL;
 365         mis.bitmap_fd = -1;
 366         mis.bitmap_file = NULL;
 367         mis.name[0] = 0;
 368         mis.container = NULL;
 369         mis.member = NULL;
 370
 371         for (w=dl_next(line); w!=line; w=dl_next(w)) {
 372                 if (w[0] == '/' || strchr(w, '=') == NULL) {
 373                         /* This names the device, or is '<ignore>'.
 374                          * The rules match those in create_mddev.
 375                          * 'w' must be:
 376                          *  /dev/md/{anything}
 377                          *  /dev/mdNN
 378                          *  /dev/md_dNN
 379                          *  <ignore>
 380                          *  or anything that doesn't start '/' or '<'
 381                          */
 382                         if (strcasecmp(w, "<ignore>") == 0 ||
 383                             strncmp(w, "/dev/md/", 8) == 0 ||
 384                             (w[0] != '/' && w[0] != '<') ||
 385                             (strncmp(w, "/dev/md", 7) == 0 &&
 386                              is_number(w+7)) ||
 387                             (strncmp(w, "/dev/md_d", 9) == 0 &&
 388                              is_number(w+9))
 389                                 ) {
 390                                 /* This is acceptable */;
 391                                 if (mis.devname)
 392                                         pr_err("only give one "
 393                                                 "device per ARRAY line: %s and %s\n",
 394                                                 mis.devname, w);
 395                                 else
 396                                         mis.devname = w;
 397                         }else {
 398                                 pr_err("%s is an invalid name for "
 399                                         "an md device - ignored.\n", w);
 400                         }
 401                 } else if (strncasecmp(w, "uuid=", 5)==0 ) {
 402                         if (mis.uuid_set)
 403                                 pr_err("only specify uuid once, %s ignored.\n",
 404                                         w);
 405                         else {
 406                                 if (parse_uuid(w+5, mis.uuid))
 407                                         mis.uuid_set = 1;
 408                                 else
 409                                         pr_err("bad uuid: %s\n", w);
 410                         }
 411                 } else if (strncasecmp(w, "super-minor=", 12)==0 ) {
 412                         if (mis.super_minor != UnSet)
 413                                 pr_err("only specify super-minor once, %s ignored.\n",
 414                                         w);
 415                         else {
 416                                 char *endptr;
 417                                 int minor = strtol(w+12, &endptr, 10);
 418
 419                                 if (w[12]==0 || endptr[0]!=0 || minor < 0)
 420                                         pr_err("invalid super-minor number: %s\n",
 421                                                 w);
 422                                 else
 423                                         mis.super_minor = minor;
 424                         }
 425                 } else if (strncasecmp(w, "name=", 5)==0) {
 426                         if (mis.name[0])
 427                                 pr_err("only specify name once, %s ignored.\n",
 428                                         w);
 429                         else if (strlen(w+5) > 32)
 430                                 pr_err("name too long, ignoring %s\n", w);
 431                         else
 432                                 strcpy(mis.name, w+5);
 433
 434                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 435                         if (mis.bitmap_file)
 436                                 pr_err("only specify bitmap file once. %s ignored\n",
 437                                         w);
 438                         else
 439                                 mis.bitmap_file = xstrdup(w+7);
 440
 441                 } else if (strncasecmp(w, "devices=", 8 ) == 0 ) {
 442                         if (mis.devices)
 443                                 pr_err("only specify devices once (use a comma separated list). %s ignored\n",
 444                                         w);
 445                         else
 446                                 mis.devices = xstrdup(w+8);
 447                 } else if (strncasecmp(w, "spare-group=", 12) == 0 ) {
 448                         if (mis.spare_group)
 449                                 pr_err("only specify one spare group per array. %s ignored.\n",
 450                                         w);
 451                         else
 452                                 mis.spare_group = xstrdup(w+12);
 453                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 454                         /* this is mainly for compatability with --brief output */
 455                         mis.level = map_name(pers, w+6);
 456                 } else if (strncasecmp(w, "disks=", 6) == 0 ) {
 457                         /* again, for compat */
 458                         mis.raid_disks = atoi(w+6);
 459                 } else if (strncasecmp(w, "num-devices=", 12) == 0 ) {
 460                         /* again, for compat */
 461                         mis.raid_disks = atoi(w+12);
 462                 } else if (strncasecmp(w, "spares=", 7) == 0 ) {
 463                         /* for warning if not all spares present */
 464                         mis.spare_disks = atoi(w+7);
 465                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 466                         /* style of metadata on the devices. */
 467                         int i;
 468
 469                         for(i=0; superlist[i] && !mis.st; i++)
 470                                 mis.st = superlist[i]->match_metadata_desc(w+9);
 471
 472                         if (!mis.st)
 473                                 pr_err("metadata format %s unknown, ignored.\n", w+9);
 474                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 475                         /* whether to create device special files as needed */
 476                         mis.autof = parse_auto(w+5, "auto type", 0);
 477                 } else if (strncasecmp(w, "member=", 7) == 0) {
 478                         /* subarray within a container */
 479                         mis.member = xstrdup(w+7);
 480                 } else if (strncasecmp(w, "container=", 10) == 0) {
 481                         /* the container holding this subarray.  Either a device name
 482                          * or a uuid */
 483                         mis.container = xstrdup(w+10);
 484                 } else {
 485                         pr_err("unrecognised word on ARRAY line: %s\n",
 486                                 w);
 487                 }
 488         }
 489         if (mis.uuid_set == 0 && mis.devices == NULL &&
 490             mis.super_minor == UnSet && mis.name[0] == 0 &&
 491             (mis.container == NULL || mis.member == NULL))
 492                 pr_err("ARRAY line %s has no identity information.\n", mis.devname);
 493         else {
 494                 mi = xmalloc(sizeof(*mi));
 495                 *mi = mis;
 496                 mi->devname = mis.devname ? xstrdup(mis.devname) : NULL;
 497                 mi->next = NULL;
 498                 *mddevlp = mi;
 499                 mddevlp = &mi->next;
 500         }
 501 }
 502
 503 static char *alert_email = NULL;
 504 void mailline(char *line)
 505 {
 506         char *w;
 507
 508         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 509                 if (alert_email == NULL)
 510                         alert_email = xstrdup(w);
 511                 else
 512                         pr_err("excess address on MAIL line: %s - ignored\n",
 513                                 w);
 514         }
 515 }
 516
 517 static char *alert_mail_from = NULL;
 518 void mailfromline(char *line)
 519 {
 520         char *w;
 521
 522         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 523                 if (alert_mail_from == NULL)
 524                         alert_mail_from = xstrdup(w);
 525                 else {
 526                         char *t = NULL;
 527
 528                         if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
 529                                 free(alert_mail_from);
 530                                 alert_mail_from = t;
 531                         }
 532                 }
 533         }
 534 }
 535
 536 static char *alert_program = NULL;
 537 void programline(char *line)
 538 {
 539         char *w;
 540
 541         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 542                 if (alert_program == NULL)
 543                         alert_program = xstrdup(w);
 544                 else
 545                         pr_err("excess program on PROGRAM line: %s - ignored\n",
 546                                 w);
 547         }
 548 }
 549
 550 static char *home_host = NULL;
 551 static int require_homehost = 1;
 552 void homehostline(char *line)
 553 {
 554         char *w;
 555
 556         for (w=dl_next(line); w != line ; w=dl_next(w)) {
 557                 if (strcasecmp(w, "<ignore>")==0)
 558                         require_homehost = 0;
 559                 else if (home_host == NULL) {
 560                         if (strcasecmp(w, "<none>")==0)
 561                                 home_host = xstrdup("");
 562                         else
 563                                 home_host = xstrdup(w);
 564                 }else
 565                         pr_err("excess host name on HOMEHOST line: %s - ignored\n",
 566                                 w);
 567         }
 568 }
 569
 570 char auto_yes[] = "yes";
 571 char auto_no[] = "no";
 572 char auto_homehost[] = "homehost";
 573
 574 static int auto_seen = 0;
 575 void autoline(char *line)
 576 {
 577         char *w;
 578         char *seen;
 579         int super_cnt;
 580         char *dflt = auto_yes;
 581         int homehost = 0;
 582         int i;
 583
 584         if (auto_seen) {
 585                 pr_err("AUTO line may only be give once."
 586                         "  Subsequent lines ignored\n");
 587                 return;
 588         }
 589         /* Parse the 'auto' line creating policy statements for the 'auto' policy.
 590          *
 591          * The default is 'yes' but the 'auto' line might over-ride that.
 592          * Words in the line are processed in order with the first
 593          * match winning.
 594          * word can be:
 595          *   +version   - that version can be assembled
 596          *   -version   - that version cannot be auto-assembled
 597          *   yes or +all - any other version can be assembled
 598          *   no or -all  - no other version can be assembled.
 599          *   homehost   - any array associated by 'homehost' to this
 600          *                host can be assembled.
 601          *
 602          * Thus:
 603          *   +ddf -0.90 homehost -all
 604          * will auto-assemble any ddf array, no 0.90 array, and
 605          * any other array (imsm, 1.x) if and only if it is identified
 606          * as belonging to this host.
 607          *
 608          * We translate that to policy by creating 'auto=yes' when we see
 609          * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
 610          * or 'auto=homehost' if we see '-version' after 'homehost'.
 611          * When we see yes, no, +all or -all we stop and any version that hasn't
 612          * been seen gets an appropriate auto= entry.
 613          */
 614
 615         for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
 616                 ;
 617         seen = xcalloc(super_cnt, 1);
 618
 619         for (w = dl_next(line); w != line ; w = dl_next(w)) {
 620                 char *val;
 621
 622                 if (strcasecmp(w, "yes") == 0) {
 623                         dflt = auto_yes;
 624                         break;
 625                 }
 626                 if (strcasecmp(w, "no") == 0) {
 627                         if (homehost)
 628                                 dflt = auto_homehost;
 629                         else
 630                                 dflt = auto_no;
 631                         break;
 632                 }
 633                 if (strcasecmp(w, "homehost") == 0) {
 634                         homehost = 1;
 635                         continue;
 636                 }
 637                 if (w[0] == '+')
 638                         val = auto_yes;
 639                 else if (w[0] == '-') {
 640                         if (homehost)
 641                                 val = auto_homehost;
 642                         else
 643                                 val = auto_no;
 644                 } else
 645                         continue;
 646
 647                 if (strcasecmp(w+1, "all") == 0) {
 648                         dflt = val;
 649                         break;
 650                 }
 651                 for (i = 0; superlist[i]; i++) {
 652                         const char *version = superlist[i]->name;
 653                         if (strcasecmp(w+1, version) == 0)
 654                                 break;
 655                         /* 1 matches 1.x, 0 matches 0.90 */
 656                         if (version[1] == '.' &&
 657                             strlen(w+1) == 1 &&
 658                             w[1] == version[0])
 659                                 break;
 660                         /* 1.anything matches 1.x */
 661                         if (strcmp(version, "1.x") == 0 &&
 662                             strncmp(w+1, "1.", 2) == 0)
 663                                 break;
 664                 }
 665                 if (superlist[i] == NULL)
 666                         /* ignore this word */
 667                         continue;
 668                 if (seen[i])
 669                         /* already know about this metadata */
 670                         continue;
 671                 policy_add(rule_policy, pol_auto, val, pol_metadata, superlist[i]->name, NULL);
 672                 seen[i] = 1;
 673         }
 674         for (i = 0; i < super_cnt; i++)
 675                 if (!seen[i])
 676                         policy_add(rule_policy, pol_auto, dflt, pol_metadata, superlist[i]->name, NULL);
 677
 678         free(seen);
 679 }
 680
 681 int loaded = 0;
 682
 683 static char *conffile = NULL;
 684 void set_conffile(char *file)
 685 {
 686         conffile = file;
 687 }
 688
 689 void load_conffile(void)
 690 {
 691         FILE *f;
 692         char *line;
 693
 694         if (loaded) return;
 695         if (conffile == NULL)
 696                 conffile = DefaultConfFile;
 697
 698         if (strcmp(conffile, "none") == 0) {
 699                 loaded = 1;
 700                 return;
 701         }
 702         if (strcmp(conffile, "partitions")==0) {
 703                 char *list = dl_strdup("DEV");
 704                 dl_init(list);
 705                 dl_add(list, dl_strdup("partitions"));
 706                 devline(list);
 707                 free_line(list);
 708                 loaded = 1;
 709                 return;
 710         }
 711         f = fopen(conffile, "r");
 712         /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 713          * To allow Debian users to compile from clean source and still
 714          * have a working mdadm, we read /etc/mdadm/mdadm.conf
 715          * if /etc/mdadm.conf doesn't exist
 716          */
 717         if (f == NULL &&
 718             conffile == DefaultConfFile) {
 719                 f = fopen(DefaultAltConfFile, "r");
 720                 if (f)
 721                         conffile = DefaultAltConfFile;
 722         }
 723         if (f == NULL)
 724                 return;
 725
 726         loaded = 1;
 727         while ((line=conf_line(f))) {
 728                 switch(match_keyword(line)) {
 729                 case Devices:
 730                         devline(line);
 731                         break;
 732                 case Array:
 733                         arrayline(line);
 734                         break;
 735                 case Mailaddr:
 736                         mailline(line);
 737                         break;
 738                 case Mailfrom:
 739                         mailfromline(line);
 740                         break;
 741                 case Program:
 742                         programline(line);
 743                         break;
 744                 case CreateDev:
 745                         createline(line);
 746                         break;
 747                 case Homehost:
 748                         homehostline(line);
 749                         break;
 750                 case AutoMode:
 751                         autoline(line);
 752                         break;
 753                 case Policy:
 754                         policyline(line, rule_policy);
 755                         break;
 756                 case PartPolicy:
 757                         policyline(line, rule_part);
 758                         break;
 759                 default:
 760                         pr_err("Unknown keyword %s\n", line);
 761                 }
 762                 free_line(line);
 763         }
 764
 765         fclose(f);
 766
 767 /*    printf("got file\n"); */
 768 }
 769
 770 char *conf_get_mailaddr(void)
 771 {
 772         load_conffile();
 773         return alert_email;
 774 }
 775
 776 char *conf_get_mailfrom(void)
 777 {
 778         load_conffile();
 779         return alert_mail_from;
 780 }
 781
 782 char *conf_get_program(void)
 783 {
 784         load_conffile();
 785         return alert_program;
 786 }
 787
 788 char *conf_get_homehost(int *require_homehostp)
 789 {
 790         load_conffile();
 791         if (require_homehostp)
 792                 *require_homehostp = require_homehost;
 793         return home_host;
 794 }
 795
 796 struct createinfo *conf_get_create_info(void)
 797 {
 798         load_conffile();
 799         return &createinfo;
 800 }
 801
 802 struct mddev_ident *conf_get_ident(char *dev)
 803 {
 804         struct mddev_ident *rv;
 805         load_conffile();
 806         rv = mddevlist;
 807         while (dev && rv && (rv->devname == NULL
 808                              || !devname_matches(dev, rv->devname)))
 809                 rv = rv->next;
 810         return rv;
 811 }
 812
 813 static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
 814 {
 815         while (*dlp)
 816                 dlp = &(*dlp)->next;
 817         *dlp = list;
 818 }
 819
 820 struct mddev_dev *conf_get_devs()
 821 {
 822         glob_t globbuf;
 823         struct conf_dev *cd;
 824         int flags = 0;
 825         static struct mddev_dev *dlist = NULL;
 826         unsigned int i;
 827
 828         while (dlist) {
 829                 struct mddev_dev *t = dlist;
 830                 dlist = dlist->next;
 831                 free(t->devname);
 832                 free(t);
 833         }
 834
 835         load_conffile();
 836
 837         if (cdevlist == NULL) {
 838                 /* default to 'partitions' and 'containers' */
 839                 dlist = load_partitions();
 840                 append_dlist(&dlist, load_containers());
 841         }
 842
 843         for (cd=cdevlist; cd; cd=cd->next) {
 844                 if (strcasecmp(cd->name, "partitions")==0)
 845                         append_dlist(&dlist, load_partitions());
 846                 else if (strcasecmp(cd->name, "containers")==0)
 847                         append_dlist(&dlist, load_containers());
 848                 else {
 849                         glob(cd->name, flags, NULL, &globbuf);
 850                         flags |= GLOB_APPEND;
 851                 }
 852         }
 853         if (flags & GLOB_APPEND) {
 854                 for (i=0; i<globbuf.gl_pathc; i++) {
 855                         struct mddev_dev *t = xmalloc(sizeof(*t));
 856                         memset(t, 0, sizeof(*t));
 857                         t->devname = xstrdup(globbuf.gl_pathv[i]);
 858                         t->next = dlist;
 859                         dlist = t;
 860 /*      printf("one dev is %s\n", t->devname);*/
 861                 }
 862                 globfree(&globbuf);
 863         }
 864
 865         return dlist;
 866 }
 867
 868 int conf_test_dev(char *devname)
 869 {
 870         struct conf_dev *cd;
 871         if (cdevlist == NULL)
 872                 /* allow anything by default */
 873                 return 1;
 874         for (cd = cdevlist ; cd ; cd = cd->next) {
 875                 if (strcasecmp(cd->name, "partitions") == 0)
 876                         return 1;
 877                 if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
 878                         return 1;
 879         }
 880         return 0;
 881 }
 882
 883 int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
 884 {
 885         /* If anyone said 'yes', that sticks.
 886          * else if homehost applies, use that
 887          * else if there is a 'no', say 'no'.
 888          * else 'yes'.
 889          */
 890         struct dev_policy *p;
 891         int no=0, found_homehost=0;
 892         load_conffile();
 893
 894         pol = pol_find(pol, pol_auto);
 895         pol_for_each(p, pol, version) {
 896                 if (strcmp(p->value, "yes") == 0)
 897                         return 1;
 898                 if (strcmp(p->value, "homehost") == 0)
 899                         found_homehost = 1;
 900                 if (strcmp(p->value, "no") == 0)
 901                         no = 1;
 902         }
 903         if (is_homehost && found_homehost)
 904                 return 1;
 905         if (no)
 906                 return 0;
 907         return 1;
 908 }
 909
 910 int match_oneof(char *devices, char *devname)
 911 {
 912         /* check if one of the comma separated patterns in devices
 913          * matches devname
 914          */
 915
 916         while (devices && *devices) {
 917                 char patn[1024];
 918                 char *p = devices;
 919                 devices = strchr(devices, ',');
 920                 if (!devices)
 921                         devices = p + strlen(p);
 922                 if (devices-p < 1024) {
 923                         strncpy(patn, p, devices-p);
 924                         patn[devices-p] = 0;
 925                         if (fnmatch(patn, devname, FNM_PATHNAME)==0)
 926                                 return 1;
 927                 }
 928                 if (*devices == ',')
 929                         devices++;
 930         }
 931         return 0;
 932 }
 933
 934 int devname_matches(char *name, char *match)
 935 {
 936         /* See if the given array name matches the
 937          * given match from config file.
 938          *
 939          * First strip and /dev/md/ or /dev/, then
 940          * see if there might be a numeric match of
 941          *  mdNN with NN
 942          * then just strcmp
 943          */
 944         if (strncmp(name, "/dev/md/", 8) == 0)
 945                 name += 8;
 946         else if (strncmp(name, "/dev/", 5) == 0)
 947                 name += 5;
 948
 949         if (strncmp(match, "/dev/md/", 8) == 0)
 950                 match += 8;
 951         else if (strncmp(match, "/dev/", 5) == 0)
 952                 match += 5;
 953
 954         if (strncmp(name, "md", 2) == 0 &&
 955             isdigit(name[2]))
 956                 name += 2;
 957         if (strncmp(match, "md", 2) == 0 &&
 958             isdigit(match[2]))
 959                 match += 2;
 960
 961         return (strcmp(name, match) == 0);
 962 }
 963
 964 int conf_name_is_free(char *name)
 965 {
 966         /* Check if this name is already taken by an ARRAY entry in
 967          * the config file.
 968          * It can be taken either by a match on devname, name, or
 969          * even super-minor.
 970          */
 971         struct mddev_ident *dev;
 972
 973         load_conffile();
 974         for (dev = mddevlist; dev; dev = dev->next) {
 975                 char nbuf[100];
 976                 if (dev->devname && devname_matches(name, dev->devname))
 977                         return 0;
 978                 if (dev->name[0] && devname_matches(name, dev->name))
 979                         return 0;
 980                 sprintf(nbuf, "%d", dev->super_minor);
 981                 if (dev->super_minor != UnSet &&
 982                     devname_matches(name, nbuf))
 983                         return 0;
 984         }
 985         return 1;
 986 }
 987
 988 struct mddev_ident *conf_match(struct supertype *st,
 989                                struct mdinfo *info,
 990                                char *devname,
 991                                int verbose, int *rvp)
 992 {
 993         struct mddev_ident *array_list, *match;
 994         array_list = conf_get_ident(NULL);
 995         match = NULL;
 996         for (; array_list; array_list = array_list->next) {
 997                 if (array_list->uuid_set &&
 998                     same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid)
 999                     == 0) {
1000                         if (verbose >= 2 && array_list->devname)
1001                                 pr_err("UUID differs from %s.\n",
1002                                        array_list->devname);
1003                         continue;
1004                 }
1005                 if (array_list->name[0] &&
1006                     strcasecmp(array_list->name, info->name) != 0) {
1007                         if (verbose >= 2 && array_list->devname)
1008                                 pr_err("Name differs from %s.\n",
1009                                        array_list->devname);
1010                         continue;
1011                 }
1012                 if (array_list->devices && devname &&
1013                     !match_oneof(array_list->devices, devname)) {
1014                         if (verbose >= 2 && array_list->devname)
1015                                 pr_err("Not a listed device for %s.\n",
1016                                        array_list->devname);
1017                         continue;
1018                 }
1019                 if (array_list->super_minor != UnSet &&
1020                     array_list->super_minor != info->array.md_minor) {
1021                         if (verbose >= 2 && array_list->devname)
1022                                 pr_err("Different super-minor to %s.\n",
1023                                        array_list->devname);
1024                         continue;
1025                 }
1026                 if (!array_list->uuid_set &&
1027                     !array_list->name[0] &&
1028                     !array_list->devices &&
1029                     array_list->super_minor == UnSet) {
1030                         if (verbose >= 2 && array_list->devname)
1031                                 pr_err("%s doesn't have any identifying"
1032                                        " information.\n",
1033                                        array_list->devname);
1034                         continue;
1035                 }
1036                 /* FIXME, should I check raid_disks and level too?? */
1037
1038                 if (match) {
1039                         if (verbose >= 0) {
1040                                 if (match->devname && array_list->devname)
1041                                         pr_err("we match both %s and %s - "
1042                                                "cannot decide which to use.\n",
1043                                                match->devname,
1044                                                array_list->devname);
1045                                 else
1046                                         pr_err("multiple lines in mdadm.conf"
1047                                                " match\n");
1048                         }
1049                         if (rvp)
1050                                 *rvp = 2;
1051                         match = NULL;
1052                         break;
1053                 }
1054                 match = array_list;
1055         }
1056         return match;
1057 }
1058
1059 int conf_verify_devnames(struct mddev_ident *array_list)
1060 {
1061         struct mddev_ident *a1, *a2;
1062
1063         for (a1 = array_list; a1; a1 = a1->next) {
1064                 if (!a1->devname)
1065                         continue;
1066                 if (strcmp(a1->devname, "<ignore>") == 0)
1067                         continue;
1068                 for (a2 = a1->next; a2; a2 = a2->next) {
1069                         if (!a2->devname)
1070                                 continue;
1071                         if (strcmp(a1->devname, a2->devname) != 0)
1072                                 continue;
1073
1074                         if (a1->uuid_set && a2->uuid_set) {
1075                                 char nbuf[64];
1076                                 __fname_from_uuid(a1->uuid, 0, nbuf, ':');
1077                                 pr_err("Devices %s and ",
1078                                        nbuf);
1079                                 __fname_from_uuid(a2->uuid, 0, nbuf, ':');
1080                                 fprintf(stderr,
1081                                         "%s have the same name: %s\n",
1082                                         nbuf, a1->devname);
1083                         } else
1084                                 pr_err("Device %s given twice"
1085                                         " in config file\n", a1->devname);
1086                         return 1;
1087                 }
1088         }
1089
1090         return 0;
1091 }