Monitor.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        "md_p.h"
  27 #include        "md_u.h"
  28 #include        <sys/wait.h>
  29 #include        <signal.h>
  30 #include        <limits.h>
  31 #include        <syslog.h>
  32
  33 static void alert(char *event, char *dev, char *disc, char *mailaddr, char *mailfrom,
  34                   char *cmd, int dosyslog);
  35
  36 static char *percentalerts[] = {
  37         "RebuildStarted",
  38         "Rebuild20",
  39         "Rebuild40",
  40         "Rebuild60",
  41         "Rebuild80",
  42 };
  43
  44 /* The largest number of disks current arrays can manage is 384
  45  * This really should be dynamically, but that will have to wait
  46  * At least it isn't MD_SB_DISKS.
  47  */
  48 #define MaxDisks 384
  49 int Monitor(mddev_dev_t devlist,
  50             char *mailaddr, char *alert_cmd,
  51             int period, int daemonise, int scan, int oneshot,
  52             int dosyslog, int test, char* pidfile)
  53 {
  54         /*
  55          * Every few seconds, scan every md device looking for changes
  56          * When a change is found, log it, possibly run the alert command,
  57          * and possibly send Email
  58          *
  59          * For each array, we record:
  60          *   Update time
  61          *   active/working/failed/spare drives
  62          *   State of each device.
  63          *   %rebuilt if rebuilding
  64          *
  65          * If the update time changes, check out all the data again
  66          * It is possible that we cannot get the state of each device
  67          * due to bugs in the md kernel module.
  68          * We also read /proc/mdstat to get rebuild percent,
  69          * and to get state on all active devices incase of kernel bug.
  70          *
  71          * Events are:
  72          *    Fail
  73          *      An active device had Faulty set or Active/Sync removed
  74          *    FailSpare
  75          *      A spare device had Faulty set
  76          *    SpareActive
  77          *      An active device had a reverse transition
  78          *    RebuildStarted
  79          *      percent went from -1 to +ve
  80          *    Rebuild20 Rebuild40 Rebuild60 Rebuild80
  81          *      percent went from below to not-below that number
  82          *    DeviceDisappeared
  83          *      Couldn't access a device which was previously visible
  84          *
  85          * if we detect an array with active<raid and spare==0
  86          * we look at other arrays that have same spare-group
  87          * If we find one with active==raid and spare>0,
  88          *  and if we can get_disk_info and find a name
  89          *  Then we hot-remove and hot-add to the other array
  90          *
  91          * If devlist is NULL, then we can monitor everything because --scan
  92          * was given.  We get an initial list from config file and add anything
  93          * that appears in /proc/mdstat
  94          */
  95
  96         struct state {
  97                 char *devname;
  98                 int devnum;     /* to sync with mdstat info */
  99                 long utime;
 100                 int err;
 101                 char *spare_group;
 102                 int active, working, failed, spare, raid;
 103                 int expected_spares;
 104                 int devstate[MaxDisks];
 105                 int devid[MaxDisks];
 106                 int percent;
 107                 struct state *next;
 108         } *statelist = NULL;
 109         int finished = 0;
 110         struct mdstat_ent *mdstat = NULL;
 111         char *mailfrom = NULL;
 112
 113         if (!mailaddr) {
 114                 mailaddr = conf_get_mailaddr();
 115                 if (mailaddr && ! scan)
 116                         fprintf(stderr, Name ": Monitor using email address \"%s\" from config file\n",
 117                                mailaddr);
 118         }
 119         mailfrom = conf_get_mailfrom();
 120
 121         if (!alert_cmd) {
 122                 alert_cmd = conf_get_program();
 123                 if (alert_cmd && ! scan)
 124                         fprintf(stderr, Name ": Monitor using program \"%s\" from config file\n",
 125                                alert_cmd);
 126         }
 127         if (scan && !mailaddr && !alert_cmd) {
 128                 fprintf(stderr, Name ": No mail address or alert command - not monitoring.\n");
 129                 return 1;
 130         }
 131
 132         if (daemonise) {
 133                 int pid = fork();
 134                 if (pid > 0) {
 135                         if (!pidfile)
 136                                 printf("%d\n", pid);
 137                         else {
 138                                 FILE *pid_file;
 139                                 pid_file=fopen(pidfile, "w");
 140                                 if (!pid_file)
 141                                         perror("cannot create pid file");
 142                                 else {
 143                                         fprintf(pid_file,"%d\n", pid);
 144                                         fclose(pid_file);
 145                                 }
 146                         }
 147                         return 0;
 148                 }
 149                 if (pid < 0) {
 150                         perror("daemonise");
 151                         return 1;
 152                 }
 153                 close(0);
 154                 open("/dev/null", O_RDWR);
 155                 dup2(0,1);
 156                 dup2(0,2);
 157                 setsid();
 158         }
 159
 160         if (devlist == NULL) {
 161                 mddev_ident_t mdlist = conf_get_ident(NULL);
 162                 for (; mdlist; mdlist=mdlist->next) {
 163                         struct state *st;
 164                         if (mdlist->devname == NULL)
 165                                 continue;
 166                         if (strcasecmp(mdlist->devname, "<ignore>") == 0)
 167                                 continue;
 168                         st = malloc(sizeof *st);
 169                         if (st == NULL)
 170                                 continue;
 171                         if (mdlist->devname[0] == '/')
 172                                 st->devname = strdup(mdlist->devname);
 173                         else {
 174                                 st->devname = malloc(8+strlen(mdlist->devname)+1);
 175                                 strcpy(strcpy(st->devname, "/dev/md/"),
 176                                        mdlist->devname);
 177                         }
 178                         st->utime = 0;
 179                         st->next = statelist;
 180                         st->err = 0;
 181                         st->devnum = INT_MAX;
 182                         st->percent = -2;
 183                         st->expected_spares = mdlist->spare_disks;
 184                         if (mdlist->spare_group)
 185                                 st->spare_group = strdup(mdlist->spare_group);
 186                         else
 187                                 st->spare_group = NULL;
 188                         statelist = st;
 189                 }
 190         } else {
 191                 mddev_dev_t dv;
 192                 for (dv=devlist ; dv; dv=dv->next) {
 193                         mddev_ident_t mdlist = conf_get_ident(dv->devname);
 194                         struct state *st = malloc(sizeof *st);
 195                         if (st == NULL)
 196                                 continue;
 197                         st->devname = strdup(dv->devname);
 198                         st->utime = 0;
 199                         st->next = statelist;
 200                         st->err = 0;
 201                         st->devnum = INT_MAX;
 202                         st->percent = -2;
 203                         st->expected_spares = -1;
 204                         st->spare_group = NULL;
 205                         if (mdlist) {
 206                                 st->expected_spares = mdlist->spare_disks;
 207                                 if (mdlist->spare_group)
 208                                         st->spare_group = strdup(mdlist->spare_group);
 209                         }
 210                         statelist = st;
 211                 }
 212         }
 213
 214
 215         while (! finished) {
 216                 int new_found = 0;
 217                 struct state *st;
 218
 219                 if (mdstat)
 220                         free_mdstat(mdstat);
 221                 mdstat = mdstat_read(oneshot?0:1, 0);
 222
 223                 for (st=statelist; st; st=st->next) {
 224                         struct { int state, major, minor; } info[MaxDisks];
 225                         mdu_array_info_t array;
 226                         struct mdstat_ent *mse = NULL, *mse2;
 227                         char *dev = st->devname;
 228                         int fd;
 229                         unsigned int i;
 230
 231                         if (test)
 232                                 alert("TestMessage", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 233                         fd = open(dev, O_RDONLY);
 234                         if (fd < 0) {
 235                                 if (!st->err)
 236                                         alert("DeviceDisappeared", dev, NULL,
 237                                               mailaddr, mailfrom, alert_cmd, dosyslog);
 238 /*                                      fprintf(stderr, Name ": cannot open %s: %s\n",
 239                                                 dev, strerror(errno));
 240 */                              st->err=1;
 241                                 continue;
 242                         }
 243                         fcntl(fd, F_SETFD, FD_CLOEXEC);
 244                         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
 245                                 if (!st->err)
 246                                         alert("DeviceDisappeared", dev, NULL,
 247                                               mailaddr, mailfrom, alert_cmd, dosyslog);
 248 /*                                      fprintf(stderr, Name ": cannot get array info for %s: %s\n",
 249                                                 dev, strerror(errno));
 250 */                              st->err=1;
 251                                 close(fd);
 252                                 continue;
 253                         }
 254                         /* It's much easier to list what array levels can't
 255                          * have a device disappear than all of them that can
 256                          */
 257                         if (array.level == 0 || array.level == -1) {
 258                                 if (!st->err)
 259                                         alert("DeviceDisappeared", dev, "Wrong-Level",
 260                                               mailaddr, mailfrom, alert_cmd, dosyslog);
 261                                 st->err = 1;
 262                                 close(fd);
 263                                 continue;
 264                         }
 265                         if (st->devnum == INT_MAX) {
 266                                 struct stat stb;
 267                                 if (fstat(fd, &stb) == 0 &&
 268                                     (S_IFMT&stb.st_mode)==S_IFBLK) {
 269                                         if (major(stb.st_rdev) == MD_MAJOR)
 270                                                 st->devnum = minor(stb.st_rdev);
 271                                         else
 272                                                 st->devnum = -1- (minor(stb.st_rdev)>>6);
 273                                 }
 274                         }
 275
 276                         for (mse2 = mdstat ; mse2 ; mse2=mse2->next)
 277                                 if (mse2->devnum == st->devnum) {
 278                                         mse2->devnum = INT_MAX; /* flag it as "used" */
 279                                         mse = mse2;
 280                                 }
 281
 282                         if (array.utime == 0)
 283                                 /* external arrays don't update utime */
 284                                 array.utime = time(0);
 285
 286                         if (st->utime == array.utime &&
 287                             st->failed == array.failed_disks &&
 288                             st->working == array.working_disks &&
 289                             st->spare == array.spare_disks &&
 290                             (mse == NULL  || (
 291                                     mse->percent == st->percent
 292                                     ))) {
 293                                 close(fd);
 294                                 st->err = 0;
 295                                 continue;
 296                         }
 297                         if (st->utime == 0 && /* new array */
 298                             mse &&      /* is in /proc/mdstat */
 299                             mse->pattern && strchr(mse->pattern, '_') /* degraded */
 300                                 )
 301                                 alert("DegradedArray", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 302
 303                         if (st->utime == 0 && /* new array */
 304                             st->expected_spares > 0 &&
 305                             array.spare_disks < st->expected_spares)
 306                                 alert("SparesMissing", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 307                         if (mse &&
 308                             st->percent == -1 &&
 309                             mse->percent >= 0)
 310                                 alert("RebuildStarted", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 311                         if (mse &&
 312                             st->percent >= 0 &&
 313                             mse->percent >= 0 &&
 314                             (mse->percent / 20) > (st->percent / 20))
 315                                 alert(percentalerts[mse->percent/20],
 316                                       dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 317
 318                         if (mse &&
 319                             mse->percent == -1 &&
 320                             st->percent >= 0) {
 321                                 /* Rebuild/sync/whatever just finished.
 322                                  * If there is a number in /mismatch_cnt,
 323                                  * we should report that.
 324                                  */
 325                                 struct mdinfo *sra =
 326                                        sysfs_read(-1, st->devnum, GET_MISMATCH);
 327                                 if (sra && sra->mismatch_cnt > 0) {
 328                                         char cnt[40];
 329                                         sprintf(cnt, " mismatches found: %d", sra->mismatch_cnt);
 330                                         alert("RebuildFinished", dev, cnt, mailaddr, mailfrom, alert_cmd, dosyslog);
 331                                 } else
 332                                         alert("RebuildFinished", dev, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 333                                 if (sra)
 334                                         free(sra);
 335                         }
 336
 337                         if (mse)
 338                                 st->percent = mse->percent;
 339
 340
 341                         for (i=0; i<MaxDisks && i <= array.raid_disks + array.nr_disks;
 342                              i++) {
 343                                 mdu_disk_info_t disc;
 344                                 disc.number = i;
 345                                 if (ioctl(fd, GET_DISK_INFO, &disc) >= 0) {
 346                                         info[i].state = disc.state;
 347                                         info[i].major = disc.major;
 348                                         info[i].minor = disc.minor;
 349                                 } else
 350                                         info[i].major = info[i].minor = 0;
 351                         }
 352                         close(fd);
 353
 354                         for (i=0; i<MaxDisks; i++) {
 355                                 mdu_disk_info_t disc = {0};
 356                                 int newstate=0;
 357                                 int change;
 358                                 char *dv = NULL;
 359                                 disc.number = i;
 360                                 if (i > array.raid_disks + array.nr_disks) {
 361                                         newstate = 0;
 362                                         disc.major = disc.minor = 0;
 363                                 } else if (info[i].major || info[i].minor) {
 364                                         newstate = info[i].state;
 365                                         dv = map_dev(info[i].major, info[i].minor, 1);
 366                                         disc.state = newstate;
 367                                         disc.major = info[i].major;
 368                                         disc.minor = info[i].minor;
 369                                 } else if (mse &&  mse->pattern && i < strlen(mse->pattern)) {
 370                                         switch(mse->pattern[i]) {
 371                                         case 'U': newstate = 6 /* ACTIVE/SYNC */; break;
 372                                         case '_': newstate = 0; break;
 373                                         }
 374                                         disc.major = disc.minor = 0;
 375                                 }
 376                                 if (dv == NULL && st->devid[i])
 377                                         dv = map_dev(major(st->devid[i]),
 378                                                      minor(st->devid[i]), 1);
 379                                 change = newstate ^ st->devstate[i];
 380                                 if (st->utime && change && !st->err) {
 381                                         if (i < (unsigned)array.raid_disks &&
 382                                             (((newstate&change)&(1<<MD_DISK_FAULTY)) ||
 383                                              ((st->devstate[i]&change)&(1<<MD_DISK_ACTIVE)) ||
 384                                              ((st->devstate[i]&change)&(1<<MD_DISK_SYNC)))
 385                                                 )
 386                                                 alert("Fail", dev, dv, mailaddr, mailfrom, alert_cmd, dosyslog);
 387                                         else if (i >= (unsigned)array.raid_disks &&
 388                                                  (disc.major || disc.minor) &&
 389                                                  st->devid[i] == makedev(disc.major, disc.minor) &&
 390                                                  ((newstate&change)&(1<<MD_DISK_FAULTY))
 391                                                 )
 392                                                 alert("FailSpare", dev, dv, mailaddr, mailfrom, alert_cmd, dosyslog);
 393                                         else if (i < (unsigned)array.raid_disks &&
 394                                                  (((st->devstate[i]&change)&(1<<MD_DISK_FAULTY)) ||
 395                                                   ((newstate&change)&(1<<MD_DISK_ACTIVE)) ||
 396                                                   ((newstate&change)&(1<<MD_DISK_SYNC)))
 397                                                 )
 398                                                 alert("SpareActive", dev, dv, mailaddr, mailfrom, alert_cmd, dosyslog);
 399                                 }
 400                                 st->devstate[i] = newstate;
 401                                 st->devid[i] = makedev(disc.major, disc.minor);
 402                         }
 403                         st->active = array.active_disks;
 404                         st->working = array.working_disks;
 405                         st->spare = array.spare_disks;
 406                         st->failed = array.failed_disks;
 407                         st->utime = array.utime;
 408                         st->raid = array.raid_disks;
 409                         st->err = 0;
 410                 }
 411                 /* now check if there are any new devices found in mdstat */
 412                 if (scan) {
 413                         struct mdstat_ent *mse;
 414                         for (mse=mdstat; mse; mse=mse->next)
 415                                 if (mse->devnum != INT_MAX &&
 416                                     mse->level &&
 417                                     (strcmp(mse->level, "raid0")!=0 &&
 418                                      strcmp(mse->level, "linear")!=0)
 419                                         ) {
 420                                         struct state *st = malloc(sizeof *st);
 421                                         mdu_array_info_t array;
 422                                         int fd;
 423                                         if (st == NULL)
 424                                                 continue;
 425                                         st->devname = strdup(get_md_name(mse->devnum));
 426                                         if ((fd = open(st->devname, O_RDONLY)) < 0 ||
 427                                             ioctl(fd, GET_ARRAY_INFO, &array)< 0) {
 428                                                 /* no such array */
 429                                                 if (fd >=0) close(fd);
 430                                                 put_md_name(st->devname);
 431                                                 free(st->devname);
 432                                                 free(st);
 433                                                 continue;
 434                                         }
 435                                         close(fd);
 436                                         st->utime = 0;
 437                                         st->next = statelist;
 438                                         st->err = 1;
 439                                         st->devnum = mse->devnum;
 440                                         st->percent = -2;
 441                                         st->spare_group = NULL;
 442                                         st->expected_spares = -1;
 443                                         statelist = st;
 444                                         if (test)
 445                                                 alert("TestMessage", st->devname, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 446                                         alert("NewArray", st->devname, NULL, mailaddr, mailfrom, alert_cmd, dosyslog);
 447                                         new_found = 1;
 448                                 }
 449                 }
 450                 /* If an array has active < raid && spare == 0 && spare_group != NULL
 451                  * Look for another array with spare > 0 and active == raid and same spare_group
 452                  *  if found, choose a device and hotremove/hotadd
 453                  */
 454                 for (st = statelist; st; st=st->next)
 455                         if (st->active < st->raid &&
 456                             st->spare == 0 &&
 457                             st->spare_group != NULL) {
 458                                 struct state *st2;
 459                                 for (st2=statelist ; st2 ; st2=st2->next)
 460                                         if (st2 != st &&
 461                                             st2->spare > 0 &&
 462                                             st2->active == st2->raid &&
 463                                             st2->spare_group != NULL &&
 464                                             strcmp(st->spare_group, st2->spare_group) == 0) {
 465                                                 /* try to remove and add */
 466                                                 int fd1 = open(st->devname, O_RDONLY);
 467                                                 int fd2 = open(st2->devname, O_RDONLY);
 468                                                 int dev = -1;
 469                                                 int d;
 470                                                 if (fd1 < 0 || fd2 < 0) {
 471                                                         if (fd1>=0) close(fd1);
 472                                                         if (fd2>=0) close(fd2);
 473                                                         continue;
 474                                                 }
 475                                                 for (d=st2->raid; d < MaxDisks; d++) {
 476                                                         if (st2->devid[d] > 0 &&
 477                                                             st2->devstate[d] == 0) {
 478                                                                 dev = st2->devid[d];
 479                                                                 break;
 480                                                         }
 481                                                 }
 482                                                 if (dev > 0) {
 483                                                         struct mddev_dev_s devlist;
 484                                                         char devname[20];
 485                                                         devlist.next = NULL;
 486                                                         devlist.used = 0;
 487                                                         devlist.re_add = 0;
 488                                                         devlist.writemostly = 0;
 489                                                         devlist.devname = devname;
 490                                                         sprintf(devname, "%d:%d", major(dev), minor(dev));
 491
 492                                                         devlist.disposition = 'r';
 493                                                         if (Manage_subdevs(st2->devname, fd2, &devlist, -1) == 0) {
 494                                                                 devlist.disposition = 'a';
 495                                                                 if (Manage_subdevs(st->devname, fd1, &devlist, -1) == 0) {
 496                                                                         alert("MoveSpare", st->devname, st2->devname, mailaddr, mailfrom, alert_cmd, dosyslog);
 497                                                                         close(fd1);
 498                                                                         close(fd2);
 499                                                                         break;
 500                                                                 }
 501                                                                 else Manage_subdevs(st2->devname, fd2, &devlist, -1);
 502                                                         }
 503                                                 }
 504                                                 close(fd1);
 505                                                 close(fd2);
 506                                         }
 507                         }
 508                 if (!new_found) {
 509                         if (oneshot)
 510                                 break;
 511                         else
 512                                 mdstat_wait(period);
 513                 }
 514                 test = 0;
 515         }
 516         if (pidfile)
 517                 unlink(pidfile);
 518         return 0;
 519 }
 520
 521
 522 static void alert(char *event, char *dev, char *disc, char *mailaddr, char *mailfrom, char *cmd,
 523                   int dosyslog)
 524 {
 525         int priority;
 526
 527         if (!cmd && !mailaddr) {
 528                 time_t now = time(0);
 529
 530                 printf("%1.15s: %s on %s %s\n", ctime(&now)+4, event, dev, disc?disc:"unknown device");
 531         }
 532         if (cmd) {
 533                 int pid = fork();
 534                 switch(pid) {
 535                 default:
 536                         waitpid(pid, NULL, 0);
 537                         break;
 538                 case -1:
 539                         break;
 540                 case 0:
 541                         execl(cmd, cmd, event, dev, disc, NULL);
 542                         exit(2);
 543                 }
 544         }
 545         if (mailaddr &&
 546             (strncmp(event, "Fail", 4)==0 ||
 547              strncmp(event, "Test", 4)==0 ||
 548              strncmp(event, "Spares", 6)==0 ||
 549              strncmp(event, "Degrade", 7)==0)) {
 550                 FILE *mp = popen(Sendmail, "w");
 551                 if (mp) {
 552                         FILE *mdstat;
 553                         char hname[256];
 554                         gethostname(hname, sizeof(hname));
 555                         signal(SIGPIPE, SIG_IGN);
 556                         if (mailfrom)
 557                                 fprintf(mp, "From: %s\n", mailfrom);
 558                         else
 559                                 fprintf(mp, "From: " Name " monitoring <root>\n");
 560                         fprintf(mp, "To: %s\n", mailaddr);
 561                         fprintf(mp, "Subject: %s event on %s:%s\n\n", event, dev, hname);
 562
 563                         fprintf(mp, "This is an automatically generated mail message from " Name "\n");
 564                         fprintf(mp, "running on %s\n\n", hname);
 565
 566                         fprintf(mp, "A %s event had been detected on md device %s.\n\n", event, dev);
 567
 568                         if (disc && disc[0] != ' ')
 569                                 fprintf(mp, "It could be related to component device %s.\n\n", disc);
 570                         if (disc && disc[0] == ' ')
 571                                 fprintf(mp, "Extra information:%s.\n\n", disc);
 572
 573                         fprintf(mp, "Faithfully yours, etc.\n");
 574
 575                         mdstat = fopen("/proc/mdstat", "r");
 576                         if (mdstat) {
 577                                 char buf[8192];
 578                                 int n;
 579                                 fprintf(mp, "\nP.S. The /proc/mdstat file currently contains the following:\n\n");
 580                                 while ( (n=fread(buf, 1, sizeof(buf), mdstat)) > 0)
 581                                         n=fwrite(buf, 1, n, mp); /* yes, i don't care about the result */
 582                                 fclose(mdstat);
 583                         }
 584                         fclose(mp);
 585                 }
 586
 587         }
 588
 589         /* log the event to syslog maybe */
 590         if (dosyslog) {
 591                 /* Log at a different severity depending on the event.
 592                  *
 593                  * These are the critical events:  */
 594                 if (strncmp(event, "Fail", 4)==0 ||
 595                     strncmp(event, "Degrade", 7)==0 ||
 596                     strncmp(event, "DeviceDisappeared", 17)==0)
 597                         priority = LOG_CRIT;
 598                 /* Good to know about, but are not failures: */
 599                 else if (strncmp(event, "Rebuild", 7)==0 ||
 600                          strncmp(event, "MoveSpare", 9)==0 ||
 601                          strncmp(event, "Spares", 6) != 0)
 602                         priority = LOG_WARNING;
 603                 /* Everything else: */
 604                 else
 605                         priority = LOG_INFO;
 606
 607                 if (disc)
 608                         syslog(priority, "%s event detected on md device %s, component device %s", event, dev, disc);
 609                 else
 610                         syslog(priority, "%s event detected on md device %s", event, dev);
 611         }
 612 }
 613
 614 /* Not really Monitor but ... */
 615 int Wait(char *dev)
 616 {
 617         struct stat stb;
 618         int devnum;
 619         int rv = 1;
 620
 621         if (stat(dev, &stb) != 0) {
 622                 fprintf(stderr, Name ": Cannot find %s: %s\n", dev,
 623                         strerror(errno));
 624                 return 2;
 625         }
 626         devnum = stat2devnum(&stb);
 627
 628         while(1) {
 629                 struct mdstat_ent *ms = mdstat_read(1, 0);
 630                 struct mdstat_ent *e;
 631
 632                 for (e=ms ; e; e=e->next)
 633                         if (e->devnum == devnum)
 634                                 break;
 635
 636                 if (!e || e->percent < 0) {
 637                         if (e && e->metadata_version &&
 638                             strncmp(e->metadata_version, "external:", 9) == 0) {
 639                                 if (is_subarray(&e->metadata_version[9]))
 640                                         ping_monitor(&e->metadata_version[9]);
 641                                 else
 642                                         ping_monitor(devnum2devname(devnum));
 643                         }
 644                         free_mdstat(ms);
 645                         return rv;
 646                 }
 647                 free_mdstat(ms);
 648                 rv = 0;
 649                 mdstat_wait(5);
 650         }
 651 }