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