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 #ifndef _POSIX_C_SOURCE
  67 #define _POSIX_C_SOURCE 200809L
  68 #endif
  69
  70 #ifndef CONFFILE
  71 #define CONFFILE "/etc/mdadm.conf"
  72 #endif
  73 #ifndef CONFFILE2
  74 /* for Debian compatibility .... */
  75 #define CONFFILE2 "/etc/mdadm/mdadm.conf"
  76 #endif
  77 char DefaultConfFile[] = CONFFILE;
  78 char DefaultConfDir[] = CONFFILE ".d";
  79 char DefaultAltConfFile[] = CONFFILE2;
  80 char DefaultAltConfDir[] = CONFFILE2 ".d";
  81
  82 enum linetype { Devices, Array, Mailaddr, Mailfrom, Program, CreateDev,
  83                 Homehost, HomeCluster, AutoMode, Policy, PartPolicy, Sysfs,
  84                 LTEnd };
  85 char *keywords[] = {
  86         [Devices]  = "devices",
  87         [Array]    = "array",
  88         [Mailaddr] = "mailaddr",
  89         [Mailfrom] = "mailfrom",
  90         [Program]  = "program",
  91         [CreateDev]= "create",
  92         [Homehost] = "homehost",
  93         [HomeCluster] = "homecluster",
  94         [AutoMode] = "auto",
  95         [Policy]   = "policy",
  96         [PartPolicy]="part-policy",
  97         [Sysfs]    = "sysfs",
  98         [LTEnd]    = NULL
  99 };
 100
 101 /*
 102  * match_keyword returns an index into the keywords array, or -1 for no match
 103  * case is ignored, and at least three characters must be given
 104  */
 105
 106 int match_keyword(char *word)
 107 {
 108         int len = strlen(word);
 109         int n;
 110
 111         if (len < 3)
 112                 return -1;
 113         for (n = 0; keywords[n]; n++) {
 114                 if (strncasecmp(word, keywords[n], len) == 0)
 115                         return n;
 116         }
 117
 118         return -1;
 119 }
 120
 121 struct conf_dev {
 122         struct conf_dev *next;
 123         char *name;
 124 } *cdevlist = NULL;
 125
 126 struct mddev_dev *load_partitions(void)
 127 {
 128         FILE *f = fopen("/proc/partitions", "r");
 129         char buf[1024];
 130         struct mddev_dev *rv = NULL;
 131
 132         if (f == NULL) {
 133                 pr_err("cannot open /proc/partitions\n");
 134                 return NULL;
 135         }
 136         while (fgets(buf, 1024, f)) {
 137                 int major, minor;
 138                 char *name, *mp;
 139                 struct mddev_dev *d;
 140
 141                 buf[1023] = '\0';
 142                 if (buf[0] != ' ')
 143                         continue;
 144                 major = strtoul(buf, &mp, 10);
 145                 if (mp == buf || *mp != ' ')
 146                         continue;
 147                 minor = strtoul(mp, NULL, 10);
 148
 149                 name = map_dev(major, minor, 1);
 150                 if (!name)
 151                         continue;
 152                 d = xcalloc(1, sizeof(*d));
 153                 d->devname = xstrdup(name);
 154                 d->next = rv;
 155                 rv = d;
 156         }
 157         fclose(f);
 158         return rv;
 159 }
 160
 161 struct mddev_dev *load_containers(void)
 162 {
 163         struct mdstat_ent *mdstat = mdstat_read(0, 0);
 164         struct mdstat_ent *ent;
 165         struct mddev_dev *d;
 166         struct mddev_dev *rv = NULL;
 167         struct map_ent *map = NULL, *me;
 168
 169         if (!mdstat)
 170                 return NULL;
 171
 172         for (ent = mdstat; ent; ent = ent->next)
 173                 if (ent->metadata_version &&
 174                     strncmp(ent->metadata_version, "external:", 9) == 0 &&
 175                     !is_subarray(&ent->metadata_version[9])) {
 176                         d = xcalloc(1, sizeof(*d));
 177                         me = map_by_devnm(&map, ent->devnm);
 178                         if (me)
 179                                 d->devname = xstrdup(me->path);
 180                         else if (asprintf(&d->devname, "/dev/%s", ent->devnm) < 0) {
 181                                 free(d);
 182                                 continue;
 183                         }
 184                         d->next = rv;
 185                         rv = d;
 186                         map_free(map);
 187                         map = NULL;
 188                 }
 189         free_mdstat(mdstat);
 190
 191         return rv;
 192 }
 193
 194 struct createinfo createinfo = {
 195         .autof = 2, /* by default, create devices with standard names */
 196         .symlinks = 1,
 197         .names = 0, /* By default, stick with numbered md devices. */
 198         .bblist = 1, /* Use a bad block list by default */
 199 #ifdef DEBIAN
 200         .gid = 6, /* disk */
 201         .mode = 0660,
 202 #else
 203         .mode = 0600,
 204 #endif
 205 };
 206
 207 int parse_auto(char *str, char *msg, int config)
 208 {
 209         int autof;
 210         if (str == NULL || *str == 0)
 211                 autof = 2;
 212         else if (strcasecmp(str, "no") == 0)
 213                 autof = 1;
 214         else if (strcasecmp(str, "yes") == 0)
 215                 autof = 2;
 216         else if (strcasecmp(str, "md") == 0)
 217                 autof = config ? 5:3;
 218         else {
 219                 /* There might be digits, and maybe a hypen, at the end */
 220                 char *e = str + strlen(str);
 221                 int num = 4;
 222                 int len;
 223                 while (e > str && isdigit(e[-1]))
 224                         e--;
 225                 if (*e) {
 226                         num = atoi(e);
 227                         if (num <= 0)
 228                                 num = 1;
 229                 }
 230                 if (e > str && e[-1] == '-')
 231                         e--;
 232                 len = e - str;
 233                 if ((len == 2 && strncasecmp(str, "md", 2) == 0)) {
 234                         autof = config ? 5 : 3;
 235                 } else if ((len == 3 && strncasecmp(str, "yes", 3) == 0)) {
 236                         autof = 2;
 237                 } else if ((len == 3 && strncasecmp(str, "mdp", 3) == 0)) {
 238                         autof = config ? 6 : 4;
 239                 } else if ((len == 1 && strncasecmp(str, "p", 1) == 0) ||
 240                            (len >= 4 && strncasecmp(str, "part", 4) == 0)) {
 241                         autof = 6;
 242                 } else {
 243                         pr_err("%s arg of \"%s\" unrecognised: use no,yes,md,mdp,part\n"
 244                                 "        optionally followed by a number.\n",
 245                                 msg, str);
 246                         exit(2);
 247                 }
 248                 autof |= num << 3;
 249         }
 250         return autof;
 251 }
 252
 253 static void createline(char *line)
 254 {
 255         char *w;
 256         char *ep;
 257
 258         for (w = dl_next(line); w != line; w = dl_next(w)) {
 259                 if (strncasecmp(w, "auto=", 5) == 0)
 260                         createinfo.autof = parse_auto(w + 5, "auto=", 1);
 261                 else if (strncasecmp(w, "owner=", 6) == 0) {
 262                         if (w[6] == 0) {
 263                                 pr_err("missing owner name\n");
 264                                 continue;
 265                         }
 266                         createinfo.uid = strtoul(w + 6, &ep, 10);
 267                         if (*ep != 0) {
 268                                 struct passwd *pw;
 269                                 /* must be a name */
 270                                 pw = getpwnam(w + 6);
 271                                 if (pw)
 272                                         createinfo.uid = pw->pw_uid;
 273                                 else
 274                                         pr_err("CREATE user %s not found\n",
 275                                                w + 6);
 276                         }
 277                 } else if (strncasecmp(w, "group=", 6) == 0) {
 278                         if (w[6] == 0) {
 279                                 pr_err("missing group name\n");
 280                                 continue;
 281                         }
 282                         createinfo.gid = strtoul(w + 6, &ep, 10);
 283                         if (*ep != 0) {
 284                                 struct group *gr;
 285                                 /* must be a name */
 286                                 gr = getgrnam(w + 6);
 287                                 if (gr)
 288                                         createinfo.gid = gr->gr_gid;
 289                                 else
 290                                         pr_err("CREATE group %s not found\n",
 291                                                w + 6);
 292                         }
 293                 } else if (strncasecmp(w, "mode=", 5) == 0) {
 294                         if (w[5] == 0) {
 295                                 pr_err("missing CREATE mode\n");
 296                                 continue;
 297                         }
 298                         createinfo.mode = strtoul(w + 5, &ep, 8);
 299                         if (*ep != 0) {
 300                                 createinfo.mode = 0600;
 301                                 pr_err("unrecognised CREATE mode %s\n",
 302                                         w + 5);
 303                         }
 304                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 305                         /* style of metadata to use by default */
 306                         int i;
 307                         for (i = 0; superlist[i] && !createinfo.supertype; i++)
 308                                 createinfo.supertype = superlist[i]->match_metadata_desc(w + 9);
 309                         if (!createinfo.supertype)
 310                                 pr_err("metadata format %s unknown, ignoring\n",
 311                                         w+9);
 312                 } else if (strncasecmp(w, "symlinks=yes", 12) == 0)
 313                         createinfo.symlinks = 1;
 314                 else if  (strncasecmp(w, "symlinks=no", 11) == 0)
 315                         createinfo.symlinks = 0;
 316                 else if (strncasecmp(w, "names=yes", 12) == 0)
 317                         createinfo.names = 1;
 318                 else if  (strncasecmp(w, "names=no", 11) == 0)
 319                         createinfo.names = 0;
 320                 else if  (strncasecmp(w, "bbl=no", 11) == 0)
 321                         createinfo.bblist = 0;
 322                 else if  (strncasecmp(w, "bbl=yes", 11) == 0)
 323                         createinfo.bblist = 1;
 324                 else {
 325                         pr_err("unrecognised word on CREATE line: %s\n",
 326                                 w);
 327                 }
 328         }
 329 }
 330
 331 void devline(char *line)
 332 {
 333         char *w;
 334         struct conf_dev *cd;
 335
 336         for (w = dl_next(line); w != line; w = dl_next(w)) {
 337                 if (w[0] == '/' || strcasecmp(w, "partitions") == 0 ||
 338                     strcasecmp(w, "containers") == 0) {
 339                         cd = xmalloc(sizeof(*cd));
 340                         cd->name = xstrdup(w);
 341                         cd->next = cdevlist;
 342                         cdevlist = cd;
 343                 } else {
 344                         pr_err("unreconised word on DEVICE line: %s\n", w);
 345                 }
 346         }
 347 }
 348
 349 struct mddev_ident *mddevlist = NULL;
 350 struct mddev_ident **mddevlp = &mddevlist;
 351
 352 static int is_number(char *w)
 353 {
 354         /* check if there are 1 or more digits and nothing else */
 355         int digits = 0;
 356         while (*w && isdigit(*w)) {
 357                 digits++;
 358                 w++;
 359         }
 360         return (digits && ! *w);
 361 }
 362
 363 void arrayline(char *line)
 364 {
 365         char *w;
 366
 367         struct mddev_ident mis;
 368         struct mddev_ident *mi;
 369
 370         mis.uuid_set = 0;
 371         mis.super_minor = UnSet;
 372         mis.level = UnSet;
 373         mis.raid_disks = UnSet;
 374         mis.spare_disks = 0;
 375         mis.devices = NULL;
 376         mis.devname = NULL;
 377         mis.spare_group = NULL;
 378         mis.autof = 0;
 379         mis.next = NULL;
 380         mis.st = NULL;
 381         mis.bitmap_fd = -1;
 382         mis.bitmap_file = NULL;
 383         mis.name[0] = 0;
 384         mis.container = NULL;
 385         mis.member = NULL;
 386
 387         for (w = dl_next(line); w != line; w = dl_next(w)) {
 388                 if (w[0] == '/' || strchr(w, '=') == NULL) {
 389                         /* This names the device, or is '<ignore>'.
 390                          * The rules match those in create_mddev.
 391                          * 'w' must be:
 392                          *  /dev/md/{anything}
 393                          *  /dev/mdNN
 394                          *  /dev/md_dNN
 395                          *  <ignore>
 396                          *  or anything that doesn't start '/' or '<'
 397                          */
 398                         if (strcasecmp(w, "<ignore>") == 0 ||
 399                             strncmp(w, "/dev/md/", 8) == 0 ||
 400                             (w[0] != '/' && w[0] != '<') ||
 401                             (strncmp(w, "/dev/md", 7) == 0 &&
 402                              is_number(w + 7)) ||
 403                             (strncmp(w, "/dev/md_d", 9) == 0 &&
 404                              is_number(w + 9))) {
 405                                 /* This is acceptable */;
 406                                 if (mis.devname)
 407                                         pr_err("only give one device per ARRAY line: %s and %s\n",
 408                                                 mis.devname, w);
 409                                 else
 410                                         mis.devname = w;
 411                         }else {
 412                                 pr_err("%s is an invalid name for an md device - ignored.\n", w);
 413                         }
 414                 } else if (strncasecmp(w, "uuid=", 5) == 0) {
 415                         if (mis.uuid_set)
 416                                 pr_err("only specify uuid once, %s ignored.\n",
 417                                        w);
 418                         else {
 419                                 if (parse_uuid(w + 5, mis.uuid))
 420                                         mis.uuid_set = 1;
 421                                 else
 422                                         pr_err("bad uuid: %s\n", w);
 423                         }
 424                 } else if (strncasecmp(w, "super-minor=", 12) == 0) {
 425                         if (mis.super_minor != UnSet)
 426                                 pr_err("only specify super-minor once, %s ignored.\n",
 427                                         w);
 428                         else {
 429                                 char *endptr;
 430                                 int minor = strtol(w + 12, &endptr, 10);
 431
 432                                 if (w[12] == 0 || endptr[0] != 0 || minor < 0)
 433                                         pr_err("invalid super-minor number: %s\n",
 434                                                w);
 435                                 else
 436                                         mis.super_minor = minor;
 437                         }
 438                 } else if (strncasecmp(w, "name=", 5) == 0) {
 439                         if (mis.name[0])
 440                                 pr_err("only specify name once, %s ignored.\n",
 441                                         w);
 442                         else if (strlen(w + 5) > 32)
 443                                 pr_err("name too long, ignoring %s\n", w);
 444                         else
 445                                 strcpy(mis.name, w + 5);
 446
 447                 } else if (strncasecmp(w, "bitmap=", 7) == 0) {
 448                         if (mis.bitmap_file)
 449                                 pr_err("only specify bitmap file once. %s ignored\n",
 450                                         w);
 451                         else
 452                                 mis.bitmap_file = xstrdup(w + 7);
 453
 454                 } else if (strncasecmp(w, "devices=", 8 ) == 0) {
 455                         if (mis.devices)
 456                                 pr_err("only specify devices once (use a comma separated list). %s ignored\n",
 457                                         w);
 458                         else
 459                                 mis.devices = xstrdup(w + 8);
 460                 } else if (strncasecmp(w, "spare-group=", 12) == 0) {
 461                         if (mis.spare_group)
 462                                 pr_err("only specify one spare group per array. %s ignored.\n",
 463                                         w);
 464                         else
 465                                 mis.spare_group = xstrdup(w + 12);
 466                 } else if (strncasecmp(w, "level=", 6) == 0 ) {
 467                         /* this is mainly for compatability with --brief output */
 468                         mis.level = map_name(pers, w + 6);
 469                 } else if (strncasecmp(w, "disks=", 6) == 0) {
 470                         /* again, for compat */
 471                         mis.raid_disks = atoi(w + 6);
 472                 } else if (strncasecmp(w, "num-devices=", 12) == 0) {
 473                         /* again, for compat */
 474                         mis.raid_disks = atoi(w + 12);
 475                 } else if (strncasecmp(w, "spares=", 7) == 0) {
 476                         /* for warning if not all spares present */
 477                         mis.spare_disks = atoi(w + 7);
 478                 } else if (strncasecmp(w, "metadata=", 9) == 0) {
 479                         /* style of metadata on the devices. */
 480                         int i;
 481
 482                         for(i=0; superlist[i] && !mis.st; i++)
 483                                 mis.st = superlist[i]->
 484                                         match_metadata_desc(w + 9);
 485
 486                         if (!mis.st)
 487                                 pr_err("metadata format %s unknown, ignored.\n",
 488                                        w + 9);
 489                 } else if (strncasecmp(w, "auto=", 5) == 0 ) {
 490                         /* whether to create device special files as needed */
 491                         mis.autof = parse_auto(w + 5, "auto type", 0);
 492                 } else if (strncasecmp(w, "member=", 7) == 0) {
 493                         /* subarray within a container */
 494                         mis.member = xstrdup(w + 7);
 495                 } else if (strncasecmp(w, "container=", 10) == 0) {
 496                         /* The container holding this subarray.
 497                          * Either a device name or a uuid */
 498                         mis.container = xstrdup(w + 10);
 499                 } else {
 500                         pr_err("unrecognised word on ARRAY line: %s\n",
 501                                 w);
 502                 }
 503         }
 504         if (mis.uuid_set == 0 && mis.devices == NULL &&
 505             mis.super_minor == UnSet && mis.name[0] == 0 &&
 506             (mis.container == NULL || mis.member == NULL))
 507                 pr_err("ARRAY line %s has no identity information.\n",
 508                        mis.devname);
 509         else {
 510                 mi = xmalloc(sizeof(*mi));
 511                 *mi = mis;
 512                 mi->devname = mis.devname ? xstrdup(mis.devname) : NULL;
 513                 mi->next = NULL;
 514                 *mddevlp = mi;
 515                 mddevlp = &mi->next;
 516         }
 517 }
 518
 519 static char *alert_email = NULL;
 520 void mailline(char *line)
 521 {
 522         char *w;
 523
 524         for (w = dl_next(line); w != line; w = dl_next(w))
 525                 if (alert_email == NULL)
 526                         alert_email = xstrdup(w);
 527 }
 528
 529 static char *alert_mail_from = NULL;
 530 void mailfromline(char *line)
 531 {
 532         char *w;
 533
 534         for (w = dl_next(line); w != line; w = dl_next(w)) {
 535                 if (alert_mail_from == NULL)
 536                         alert_mail_from = xstrdup(w);
 537                 else {
 538                         char *t = NULL;
 539
 540                         if (xasprintf(&t, "%s %s", alert_mail_from, w) > 0) {
 541                                 free(alert_mail_from);
 542                                 alert_mail_from = t;
 543                         }
 544                 }
 545         }
 546 }
 547
 548 static char *alert_program = NULL;
 549 void programline(char *line)
 550 {
 551         char *w;
 552
 553         for (w = dl_next(line); w != line; w = dl_next(w))
 554                 if (alert_program == NULL)
 555                         alert_program = xstrdup(w);
 556 }
 557
 558 static char *home_host = NULL;
 559 static int require_homehost = 1;
 560 void homehostline(char *line)
 561 {
 562         char *w;
 563
 564         for (w = dl_next(line); w != line; w = dl_next(w)) {
 565                 if (strcasecmp(w, "<ignore>") == 0)
 566                         require_homehost = 0;
 567                 else if (home_host == NULL) {
 568                         if (strcasecmp(w, "<none>") == 0)
 569                                 home_host = xstrdup("");
 570                         else
 571                                 home_host = xstrdup(w);
 572                 }
 573         }
 574 }
 575
 576 static char *home_cluster = NULL;
 577 void homeclusterline(char *line)
 578 {
 579         char *w;
 580
 581         for (w = dl_next(line); w != line; w = dl_next(w)) {
 582                 if (home_cluster == NULL) {
 583                         if (strcasecmp(w, "<none>") == 0)
 584                                 home_cluster = xstrdup("");
 585                         else
 586                                 home_cluster = xstrdup(w);
 587                 }
 588         }
 589 }
 590
 591 char auto_yes[] = "yes";
 592 char auto_no[] = "no";
 593 char auto_homehost[] = "homehost";
 594
 595 static int auto_seen = 0;
 596 void autoline(char *line)
 597 {
 598         char *w;
 599         char *seen;
 600         int super_cnt;
 601         char *dflt = auto_yes;
 602         int homehost = 0;
 603         int i;
 604
 605         if (auto_seen)
 606                 return;
 607         auto_seen = 1;
 608
 609         /*
 610          * Parse the 'auto' line creating policy statements for the 'auto'
 611          * policy.
 612          *
 613          * The default is 'yes' but the 'auto' line might over-ride that.
 614          * Words in the line are processed in order with the first
 615          * match winning.
 616          * word can be:
 617          *   +version   - that version can be assembled
 618          *   -version   - that version cannot be auto-assembled
 619          *   yes or +all - any other version can be assembled
 620          *   no or -all  - no other version can be assembled.
 621          *   homehost   - any array associated by 'homehost' to this
 622          *                host can be assembled.
 623          *
 624          * Thus:
 625          *   +ddf -0.90 homehost -all
 626          * will auto-assemble any ddf array, no 0.90 array, and
 627          * any other array (imsm, 1.x) if and only if it is identified
 628          * as belonging to this host.
 629          *
 630          * We translate that to policy by creating 'auto=yes' when we see
 631          * a '+version' line, 'auto=no' if we see '-version' before 'homehost',
 632          * or 'auto=homehost' if we see '-version' after 'homehost'.
 633          * When we see yes, no, +all or -all we stop and any version that hasn't
 634          * been seen gets an appropriate auto= entry.
 635          */
 636
 637         /*
 638          * If environment variable MDADM_CONF_AUTO is defined, then
 639          * it is prepended to the auto line.  This allow a script
 640          * to easily disable some metadata types.
 641          */
 642         w = getenv("MDADM_CONF_AUTO");
 643         if (w && *w) {
 644                 char *l = xstrdup(w);
 645                 char *head = line;
 646                 w = strtok(l, " \t");
 647                 while (w) {
 648                         char *nw = dl_strdup(w);
 649                         dl_insert(head, nw);
 650                         head = nw;
 651                         w = strtok(NULL, " \t");
 652                 }
 653                 free(l);
 654         }
 655
 656         for (super_cnt = 0; superlist[super_cnt]; super_cnt++)
 657                 ;
 658         seen = xcalloc(super_cnt, 1);
 659
 660         for (w = dl_next(line); w != line; w = dl_next(w)) {
 661                 char *val;
 662
 663                 if (strcasecmp(w, "yes") == 0) {
 664                         dflt = auto_yes;
 665                         break;
 666                 }
 667                 if (strcasecmp(w, "no") == 0) {
 668                         if (homehost)
 669                                 dflt = auto_homehost;
 670                         else
 671                                 dflt = auto_no;
 672                         break;
 673                 }
 674                 if (strcasecmp(w, "homehost") == 0) {
 675                         homehost = 1;
 676                         continue;
 677                 }
 678                 if (w[0] == '+')
 679                         val = auto_yes;
 680                 else if (w[0] == '-') {
 681                         if (homehost)
 682                                 val = auto_homehost;
 683                         else
 684                                 val = auto_no;
 685                 } else
 686                         continue;
 687
 688                 if (strcasecmp(w + 1, "all") == 0) {
 689                         dflt = val;
 690                         break;
 691                 }
 692                 for (i = 0; superlist[i]; i++) {
 693                         const char *version = superlist[i]->name;
 694                         if (strcasecmp(w + 1, version) == 0)
 695                                 break;
 696                         /* 1 matches 1.x, 0 matches 0.90 */
 697                         if (version[1] == '.' && strlen(w + 1) == 1 &&
 698                             w[1] == version[0])
 699                                 break;
 700                         /* 1.anything matches 1.x */
 701                         if (strcmp(version, "1.x") == 0 &&
 702                             strncmp(w + 1, "1.", 2) == 0)
 703                                 break;
 704                 }
 705                 if (superlist[i] == NULL)
 706                         /* ignore this word */
 707                         continue;
 708                 if (seen[i])
 709                         /* already know about this metadata */
 710                         continue;
 711                 policy_add(rule_policy, pol_auto, val, pol_metadata,
 712                            superlist[i]->name, NULL);
 713                 seen[i] = 1;
 714         }
 715         for (i = 0; i < super_cnt; i++)
 716                 if (!seen[i])
 717                         policy_add(rule_policy, pol_auto, dflt, pol_metadata,
 718                                    superlist[i]->name, NULL);
 719
 720         free(seen);
 721 }
 722
 723 int loaded = 0;
 724
 725 static char *conffile = NULL;
 726 void set_conffile(char *file)
 727 {
 728         conffile = file;
 729 }
 730
 731 void conf_file(FILE *f)
 732 {
 733         char *line;
 734         while ((line = conf_line(f))) {
 735                 switch(match_keyword(line)) {
 736                 case Devices:
 737                         devline(line);
 738                         break;
 739                 case Array:
 740                         arrayline(line);
 741                         break;
 742                 case Mailaddr:
 743                         mailline(line);
 744                         break;
 745                 case Mailfrom:
 746                         mailfromline(line);
 747                         break;
 748                 case Program:
 749                         programline(line);
 750                         break;
 751                 case CreateDev:
 752                         createline(line);
 753                         break;
 754                 case Homehost:
 755                         homehostline(line);
 756                         break;
 757                 case HomeCluster:
 758                         homeclusterline(line);
 759                         break;
 760                 case AutoMode:
 761                         autoline(line);
 762                         break;
 763                 case Policy:
 764                         policyline(line, rule_policy);
 765                         break;
 766                 case PartPolicy:
 767                         policyline(line, rule_part);
 768                         break;
 769                 case Sysfs:
 770                         sysfsline(line);
 771                         break;
 772                 default:
 773                         pr_err("Unknown keyword %s\n", line);
 774                 }
 775                 free_line(line);
 776         }
 777 }
 778
 779 struct fname {
 780         struct fname *next;
 781         char name[];
 782 };
 783
 784 void conf_file_or_dir(FILE *f)
 785 {
 786         struct stat st;
 787         DIR *dir;
 788         struct dirent *dp;
 789         struct fname *list = NULL;
 790
 791         fstat(fileno(f), &st);
 792         if (S_ISREG(st.st_mode))
 793                 conf_file(f);
 794         else if (!S_ISDIR(st.st_mode))
 795                 return;
 796 #if _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
 797         dir = fdopendir(fileno(f));
 798         if (!dir)
 799                 return;
 800         while ((dp = readdir(dir)) != NULL) {
 801                 int l;
 802                 struct fname *fn, **p;
 803                 if (dp->d_ino == 0)
 804                         continue;
 805                 if (dp->d_name[0] == '.')
 806                         continue;
 807                 l = strlen(dp->d_name);
 808                 if (l < 6 || strcmp(dp->d_name + l - 5, ".conf") != 0)
 809                         continue;
 810                 fn = xmalloc(sizeof(*fn) + l + 1);
 811                 strcpy(fn->name, dp->d_name);
 812                 for (p = &list;
 813                      *p && strcmp((*p)->name, fn->name) < 0;
 814                      p = & (*p)->next)
 815                         ;
 816                 fn->next = *p;
 817                 *p = fn;
 818         }
 819         while (list) {
 820                 int fd;
 821                 FILE *f2;
 822                 struct fname *fn = list;
 823                 list = list->next;
 824                 fd = openat(fileno(f), fn->name, O_RDONLY);
 825                 free(fn);
 826                 if (fd < 0)
 827                         continue;
 828                 f2 = fdopen(fd, "r");
 829                 if (!f2) {
 830                         close(fd);
 831                         continue;
 832                 }
 833                 conf_file(f2);
 834                 fclose(f2);
 835         }
 836         closedir(dir);
 837 #endif
 838 }
 839
 840 void load_conffile(void)
 841 {
 842         FILE *f;
 843         char *confdir = NULL;
 844         char *head;
 845
 846         if (loaded)
 847                 return;
 848         if (conffile == NULL) {
 849                 conffile = DefaultConfFile;
 850                 confdir = DefaultConfDir;
 851         }
 852
 853         if (strcmp(conffile, "partitions") == 0) {
 854                 char *list = dl_strdup("DEV");
 855                 dl_init(list);
 856                 dl_add(list, dl_strdup("partitions"));
 857                 devline(list);
 858                 free_line(list);
 859         } else if (strcmp(conffile, "none") != 0) {
 860                 f = fopen(conffile, "r");
 861                 /* Debian chose to relocate mdadm.conf into /etc/mdadm/.
 862                  * To allow Debian users to compile from clean source and still
 863                  * have a working mdadm, we read /etc/mdadm/mdadm.conf
 864                  * if /etc/mdadm.conf doesn't exist
 865                  */
 866                 if (f == NULL && conffile == DefaultConfFile) {
 867                         f = fopen(DefaultAltConfFile, "r");
 868                         if (f) {
 869                                 conffile = DefaultAltConfFile;
 870                                 confdir = DefaultAltConfDir;
 871                         }
 872                 }
 873                 if (f) {
 874                         conf_file_or_dir(f);
 875                         fclose(f);
 876                 }
 877                 if (confdir) {
 878                         f = fopen(confdir, "r");
 879                         if (f) {
 880                                 conf_file_or_dir(f);
 881                                 fclose(f);
 882                         }
 883                 }
 884         }
 885         /* If there was no AUTO line, process an empty line
 886          * now so that the MDADM_CONF_AUTO env var gets processed.
 887          */
 888         head = dl_strdup("AUTO");
 889         dl_init(head);
 890         autoline(head);
 891         free_line(head);
 892
 893         loaded = 1;
 894 }
 895
 896 char *conf_get_mailaddr(void)
 897 {
 898         load_conffile();
 899         return alert_email;
 900 }
 901
 902 char *conf_get_mailfrom(void)
 903 {
 904         load_conffile();
 905         return alert_mail_from;
 906 }
 907
 908 char *conf_get_program(void)
 909 {
 910         load_conffile();
 911         return alert_program;
 912 }
 913
 914 char *conf_get_homehost(int *require_homehostp)
 915 {
 916         load_conffile();
 917         if (require_homehostp)
 918                 *require_homehostp = require_homehost;
 919         return home_host;
 920 }
 921
 922 char *conf_get_homecluster(void)
 923 {
 924         load_conffile();
 925         return home_cluster;
 926 }
 927
 928 struct createinfo *conf_get_create_info(void)
 929 {
 930         load_conffile();
 931         return &createinfo;
 932 }
 933
 934 struct mddev_ident *conf_get_ident(char *dev)
 935 {
 936         struct mddev_ident *rv;
 937         load_conffile();
 938         rv = mddevlist;
 939         while (dev && rv && (rv->devname == NULL ||
 940                              !devname_matches(dev, rv->devname)))
 941                 rv = rv->next;
 942         return rv;
 943 }
 944
 945 static void append_dlist(struct mddev_dev **dlp, struct mddev_dev *list)
 946 {
 947         while (*dlp)
 948                 dlp = &(*dlp)->next;
 949         *dlp = list;
 950 }
 951
 952 struct mddev_dev *conf_get_devs()
 953 {
 954         glob_t globbuf;
 955         struct conf_dev *cd;
 956         int flags = 0;
 957         static struct mddev_dev *dlist = NULL;
 958         unsigned int i;
 959
 960         while (dlist) {
 961                 struct mddev_dev *t = dlist;
 962                 dlist = dlist->next;
 963                 free(t->devname);
 964                 free(t);
 965         }
 966
 967         load_conffile();
 968
 969         if (cdevlist == NULL) {
 970                 /* default to 'partitions' and 'containers' */
 971                 dlist = load_partitions();
 972                 append_dlist(&dlist, load_containers());
 973         }
 974
 975         for (cd = cdevlist; cd; cd = cd->next) {
 976                 if (strcasecmp(cd->name, "partitions") == 0)
 977                         append_dlist(&dlist, load_partitions());
 978                 else if (strcasecmp(cd->name, "containers") == 0)
 979                         append_dlist(&dlist, load_containers());
 980                 else {
 981                         glob(cd->name, flags, NULL, &globbuf);
 982                         flags |= GLOB_APPEND;
 983                 }
 984         }
 985         if (flags & GLOB_APPEND) {
 986                 for (i = 0; i < globbuf.gl_pathc; i++) {
 987                         struct mddev_dev *t;
 988                         t = xcalloc(1, sizeof(*t));
 989                         t->devname = xstrdup(globbuf.gl_pathv[i]);
 990                         t->next = dlist;
 991                         dlist = t;
 992 /*      printf("one dev is %s\n", t->devname);*/
 993                 }
 994                 globfree(&globbuf);
 995         }
 996
 997         return dlist;
 998 }
 999
1000 int conf_test_dev(char *devname)
1001 {
1002         struct conf_dev *cd;
1003         if (cdevlist == NULL)
1004                 /* allow anything by default */
1005                 return 1;
1006         for (cd = cdevlist; cd; cd = cd->next) {
1007                 if (strcasecmp(cd->name, "partitions") == 0)
1008                         return 1;
1009                 if (fnmatch(cd->name, devname, FNM_PATHNAME) == 0)
1010                         return 1;
1011         }
1012         return 0;
1013 }
1014
1015 int conf_test_metadata(const char *version, struct dev_policy *pol, int is_homehost)
1016 {
1017         /* If anyone said 'yes', that sticks.
1018          * else if homehost applies, use that
1019          * else if there is a 'no', say 'no'.
1020          * else 'yes'.
1021          */
1022         struct dev_policy *p;
1023         int no = 0, found_homehost = 0;
1024         load_conffile();
1025
1026         pol = pol_find(pol, pol_auto);
1027         pol_for_each(p, pol, version) {
1028                 if (strcmp(p->value, "yes") == 0)
1029                         return 1;
1030                 if (strcmp(p->value, "homehost") == 0)
1031                         found_homehost = 1;
1032                 if (strcmp(p->value, "no") == 0)
1033                         no = 1;
1034         }
1035         if (is_homehost && found_homehost)
1036                 return 1;
1037         if (no)
1038                 return 0;
1039         return 1;
1040 }
1041
1042 int match_oneof(char *devices, char *devname)
1043 {
1044         /* check if one of the comma separated patterns in devices
1045          * matches devname
1046          */
1047
1048         while (devices && *devices) {
1049                 char patn[1024];
1050                 char *p = devices;
1051                 devices = strchr(devices, ',');
1052                 if (!devices)
1053                         devices = p + strlen(p);
1054                 if (devices-p < 1024) {
1055                         strncpy(patn, p, devices - p);
1056                         patn[devices-p] = 0;
1057                         if (fnmatch(patn, devname, FNM_PATHNAME) == 0)
1058                                 return 1;
1059                 }
1060                 if (*devices == ',')
1061                         devices++;
1062         }
1063         return 0;
1064 }
1065
1066 int devname_matches(char *name, char *match)
1067 {
1068         /* See if the given array name matches the
1069          * given match from config file.
1070          *
1071          * First strip and /dev/md/ or /dev/, then
1072          * see if there might be a numeric match of
1073          *  mdNN with NN
1074          * then just strcmp
1075          */
1076         if (strncmp(name, "/dev/md/", 8) == 0)
1077                 name += 8;
1078         else if (strncmp(name, "/dev/", 5) == 0)
1079                 name += 5;
1080
1081         if (strncmp(match, "/dev/md/", 8) == 0)
1082                 match += 8;
1083         else if (strncmp(match, "/dev/", 5) == 0)
1084                 match += 5;
1085
1086         if (strncmp(name, "md", 2) == 0 && isdigit(name[2]))
1087                 name += 2;
1088         if (strncmp(match, "md", 2) == 0 && isdigit(match[2]))
1089                 match += 2;
1090
1091         return (strcmp(name, match) == 0);
1092 }
1093
1094 int conf_name_is_free(char *name)
1095 {
1096         /* Check if this name is already taken by an ARRAY entry in
1097          * the config file.
1098          * It can be taken either by a match on devname, name, or
1099          * even super-minor.
1100          */
1101         struct mddev_ident *dev;
1102
1103         load_conffile();
1104         for (dev = mddevlist; dev; dev = dev->next) {
1105                 char nbuf[100];
1106                 if (dev->devname && devname_matches(name, dev->devname))
1107                         return 0;
1108                 if (dev->name[0] && devname_matches(name, dev->name))
1109                         return 0;
1110                 sprintf(nbuf, "%d", dev->super_minor);
1111                 if (dev->super_minor != UnSet && devname_matches(name, nbuf))
1112                         return 0;
1113         }
1114         return 1;
1115 }
1116
1117 struct mddev_ident *conf_match(struct supertype *st,
1118                                struct mdinfo *info,
1119                                char *devname,
1120                                int verbose, int *rvp)
1121 {
1122         struct mddev_ident *array_list, *match;
1123         array_list = conf_get_ident(NULL);
1124         match = NULL;
1125         for (; array_list; array_list = array_list->next) {
1126                 if (array_list->uuid_set &&
1127                     same_uuid(array_list->uuid, info->uuid,
1128                               st->ss->swapuuid) == 0) {
1129                         if (verbose >= 2 && array_list->devname)
1130                                 pr_err("UUID differs from %s.\n",
1131                                        array_list->devname);
1132                         continue;
1133                 }
1134                 if (array_list->name[0] &&
1135                     strcasecmp(array_list->name, info->name) != 0) {
1136                         if (verbose >= 2 && array_list->devname)
1137                                 pr_err("Name differs from %s.\n",
1138                                        array_list->devname);
1139                         continue;
1140                 }
1141                 if (array_list->devices && devname &&
1142                     !match_oneof(array_list->devices, devname)) {
1143                         if (verbose >= 2 && array_list->devname)
1144                                 pr_err("Not a listed device for %s.\n",
1145                                        array_list->devname);
1146                         continue;
1147                 }
1148                 if (array_list->super_minor != UnSet &&
1149                     array_list->super_minor != info->array.md_minor) {
1150                         if (verbose >= 2 && array_list->devname)
1151                                 pr_err("Different super-minor to %s.\n",
1152                                        array_list->devname);
1153                         continue;
1154                 }
1155                 if (!array_list->uuid_set && !array_list->name[0] &&
1156                     !array_list->devices && array_list->super_minor == UnSet) {
1157                         if (verbose >= 2 && array_list->devname)
1158                                 pr_err("%s doesn't have any identifying information.\n",
1159                                        array_list->devname);
1160                         continue;
1161                 }
1162                 /* FIXME, should I check raid_disks and level too?? */
1163
1164                 if (match) {
1165                         if (verbose >= 0) {
1166                                 if (match->devname && array_list->devname)
1167                                         pr_err("we match both %s and %s - cannot decide which to use.\n",
1168                                                match->devname,
1169                                                array_list->devname);
1170                                 else
1171                                         pr_err("multiple lines in mdadm.conf match\n");
1172                         }
1173                         if (rvp)
1174                                 *rvp = 2;
1175                         match = NULL;
1176                         break;
1177                 }
1178                 match = array_list;
1179         }
1180         return match;
1181 }
1182
1183 int conf_verify_devnames(struct mddev_ident *array_list)
1184 {
1185         struct mddev_ident *a1, *a2;
1186
1187         for (a1 = array_list; a1; a1 = a1->next) {
1188                 if (!a1->devname)
1189                         continue;
1190                 if (strcmp(a1->devname, "<ignore>") == 0)
1191                         continue;
1192                 for (a2 = a1->next; a2; a2 = a2->next) {
1193                         if (!a2->devname)
1194                                 continue;
1195                         if (strcmp(a1->devname, a2->devname) != 0)
1196                                 continue;
1197
1198                         if (a1->uuid_set && a2->uuid_set) {
1199                                 char nbuf[64];
1200                                 __fname_from_uuid(a1->uuid, 0, nbuf, ':');
1201                                 pr_err("Devices %s and ",
1202                                        nbuf);
1203                                 __fname_from_uuid(a2->uuid, 0, nbuf, ':');
1204                                 fprintf(stderr,
1205                                         "%s have the same name: %s\n",
1206                                         nbuf, a1->devname);
1207                         } else
1208                                 pr_err("Device %s given twice in config file\n", a1->devname);
1209                         return 1;
1210                 }
1211         }
1212
1213         return 0;
1214 }