libmultipath/devmapper.c

   1 /*
   2  * snippets copied from device-mapper dmsetup.c
   3  * Copyright (c) 2004, 2005 Christophe Varoqui
   4  * Copyright (c) 2005 Kiyoshi Ueda, NEC
   5  * Copyright (c) 2005 Patrick Caulfield, Redhat
   6  */
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9 #include <stdarg.h>
  10 #include <string.h>
  11 #include <libdevmapper.h>
  12 #include <ctype.h>
  13 #include <unistd.h>
  14 #include <errno.h>
  15
  16 #include "checkers.h"
  17 #include "vector.h"
  18 #include "structs.h"
  19 #include "debug.h"
  20 #include "memory.h"
  21 #include "devmapper.h"
  22 #include "sysfs.h"
  23
  24 #include "log_pthread.h"
  25 #include <sys/types.h>
  26 #include <time.h>
  27
  28 #define MAX_WAIT 5
  29 #define LOOPS_PER_SEC 5
  30
  31 #define UUID_PREFIX "mpath-"
  32 #define UUID_PREFIX_LEN 6
  33
  34 static int dm_conf_verbosity;
  35
  36 #ifdef LIBDM_API_DEFERRED
  37 static int dm_cancel_remove_partmaps(const char * mapname);
  38 #endif
  39
  40 static int do_foreach_partmaps(const char * mapname,
  41                                int (*partmap_func)(const char *, void *),
  42                                void *data);
  43
  44 #ifndef LIBDM_API_COOKIE
  45 static inline int dm_task_set_cookie(struct dm_task *dmt, uint32_t *c, int a)
  46 {
  47         return 1;
  48 }
  49
  50 void dm_udev_wait(unsigned int c)
  51 {
  52 }
  53
  54 void dm_udev_set_sync_support(int c)
  55 {
  56 }
  57
  58 #endif
  59
  60 static void
  61 dm_write_log (int level, const char *file, int line, const char *f, ...)
  62 {
  63         va_list ap;
  64         int thres;
  65
  66         if (level > 6)
  67                 level = 6;
  68
  69         thres = dm_conf_verbosity;
  70         if (thres <= 3 || level > thres)
  71                 return;
  72
  73         va_start(ap, f);
  74         if (logsink < 1) {
  75                 if (logsink == 0) {
  76                         time_t t = time(NULL);
  77                         struct tm *tb = localtime(&t);
  78                         char buff[16];
  79
  80                         strftime(buff, sizeof(buff), "%b %d %H:%M:%S", tb);
  81                         buff[sizeof(buff)-1] = '\0';
  82
  83                         fprintf(stdout, "%s | ", buff);
  84                 }
  85                 fprintf(stdout, "libdevmapper: %s(%i): ", file, line);
  86                 vfprintf(stdout, f, ap);
  87                 fprintf(stdout, "\n");
  88         } else {
  89                 condlog(level, "libdevmapper: %s(%i): ", file, line);
  90                 log_safe(level + 3, f, ap);
  91         }
  92         va_end(ap);
  93
  94         return;
  95 }
  96
  97 extern void
  98 dm_init(int v) {
  99         dm_log_init(&dm_write_log);
 100         dm_log_init_verbose(v + 3);
 101 }
 102
 103 static int
 104 dm_lib_prereq (void)
 105 {
 106         char version[64];
 107         int v[3];
 108 #if defined(LIBDM_API_DEFERRED)
 109         int minv[3] = {1, 2, 89};
 110 #elif defined(DM_SUBSYSTEM_UDEV_FLAG0)
 111         int minv[3] = {1, 2, 82};
 112 #elif defined(LIBDM_API_COOKIE)
 113         int minv[3] = {1, 2, 38};
 114 #else
 115         int minv[3] = {1, 2, 8};
 116 #endif
 117
 118         dm_get_library_version(version, sizeof(version));
 119         condlog(3, "libdevmapper version %s", version);
 120         if (sscanf(version, "%d.%d.%d ", &v[0], &v[1], &v[2]) != 3) {
 121                 condlog(0, "invalid libdevmapper version %s", version);
 122                 return 1;
 123         }
 124
 125         if VERSION_GE(v, minv)
 126                 return 0;
 127         condlog(0, "libdevmapper version must be >= %d.%.2d.%.2d",
 128                 minv[0], minv[1], minv[2]);
 129         return 1;
 130 }
 131
 132 int
 133 dm_drv_version (unsigned int * version, char * str)
 134 {
 135         int r = 2;
 136         struct dm_task *dmt;
 137         struct dm_versions *target;
 138         struct dm_versions *last_target;
 139         unsigned int *v;
 140
 141         version[0] = 0;
 142         version[1] = 0;
 143         version[2] = 0;
 144
 145         if (!(dmt = dm_task_create(DM_DEVICE_LIST_VERSIONS)))
 146                 return 1;
 147
 148         dm_task_no_open_count(dmt);
 149
 150         if (!dm_task_run(dmt)) {
 151                 condlog(0, "Can not communicate with kernel DM");
 152                 goto out;
 153         }
 154         target = dm_task_get_versions(dmt);
 155
 156         do {
 157                 last_target = target;
 158                 if (!strncmp(str, target->name, strlen(str))) {
 159                         r = 1;
 160                         break;
 161                 }
 162                 target = (void *) target + target->next;
 163         } while (last_target != target);
 164
 165         if (r == 2) {
 166                 condlog(0, "DM %s kernel driver not loaded", str);
 167                 goto out;
 168         }
 169         v = target->version;
 170         version[0] = v[0];
 171         version[1] = v[1];
 172         version[2] = v[2];
 173         r = 0;
 174 out:
 175         dm_task_destroy(dmt);
 176         return r;
 177 }
 178
 179 static int
 180 dm_drv_prereq (void)
 181 {
 182         unsigned int minv[3] = {1, 0, 3};
 183         unsigned int version[3] = {0, 0, 0};
 184         unsigned int * v = version;
 185
 186         if (dm_drv_version(v, TGT_MPATH)) {
 187                 /* in doubt return not capable */
 188                 return 1;
 189         }
 190
 191         /* test request based multipath capability */
 192         condlog(3, "DM multipath kernel driver v%u.%u.%u",
 193                 v[0], v[1], v[2]);
 194
 195         if VERSION_GE(v, minv)
 196                 return 0;
 197
 198         condlog(0, "DM multipath kernel driver must be >= v%u.%u.%u",
 199                 minv[0], minv[1], minv[2]);
 200         return 1;
 201 }
 202
 203 extern int
 204 dm_prereq (void)
 205 {
 206         if (dm_lib_prereq())
 207                 return 1;
 208         return dm_drv_prereq();
 209 }
 210
 211 #define do_deferred(x) ((x) == DEFERRED_REMOVE_ON || (x) == DEFERRED_REMOVE_IN_PROGRESS)
 212
 213 static int
 214 dm_simplecmd (int task, const char *name, int no_flush, int need_sync, uint16_t udev_flags, int deferred_remove) {
 215         int r = 0;
 216         int udev_wait_flag = ((need_sync || udev_flags) &&
 217                               (task == DM_DEVICE_RESUME ||
 218                                task == DM_DEVICE_REMOVE));
 219         uint32_t cookie = 0;
 220         struct dm_task *dmt;
 221
 222         if (!(dmt = dm_task_create (task)))
 223                 return 0;
 224
 225         if (!dm_task_set_name (dmt, name))
 226                 goto out;
 227
 228         dm_task_no_open_count(dmt);
 229         dm_task_skip_lockfs(dmt);       /* for DM_DEVICE_RESUME */
 230 #ifdef LIBDM_API_FLUSH
 231         if (no_flush)
 232                 dm_task_no_flush(dmt);          /* for DM_DEVICE_SUSPEND/RESUME */
 233 #endif
 234 #ifdef LIBDM_API_DEFERRED
 235         if (do_deferred(deferred_remove))
 236                 dm_task_deferred_remove(dmt);
 237 #endif
 238         if (udev_wait_flag &&
 239             !dm_task_set_cookie(dmt, &cookie,
 240                                 DM_UDEV_DISABLE_LIBRARY_FALLBACK | udev_flags))
 241                 goto out;
 242
 243         r = dm_task_run (dmt);
 244
 245         if (udev_wait_flag)
 246                         dm_udev_wait(cookie);
 247 out:
 248         dm_task_destroy (dmt);
 249         return r;
 250 }
 251
 252 extern int
 253 dm_simplecmd_flush (int task, const char *name, uint16_t udev_flags) {
 254         return dm_simplecmd(task, name, 0, 1, udev_flags, 0);
 255 }
 256
 257 extern int
 258 dm_simplecmd_noflush (int task, const char *name, uint16_t udev_flags) {
 259         return dm_simplecmd(task, name, 1, 1, udev_flags, 0);
 260 }
 261
 262 static int
 263 dm_device_remove (const char *name, int needsync, int deferred_remove) {
 264         return dm_simplecmd(DM_DEVICE_REMOVE, name, 0, needsync, 0,
 265                             deferred_remove);
 266 }
 267
 268 static int
 269 dm_addmap (int task, const char *target, struct multipath *mpp,
 270            char * params, int ro, int skip_kpartx) {
 271         int r = 0;
 272         struct dm_task *dmt;
 273         char *prefixed_uuid = NULL;
 274         uint32_t cookie = 0;
 275         uint16_t udev_flags = DM_UDEV_DISABLE_LIBRARY_FALLBACK | ((skip_kpartx == SKIP_KPARTX_ON)? MPATH_UDEV_NO_KPARTX_FLAG : 0);
 276
 277         if (!(dmt = dm_task_create (task)))
 278                 return 0;
 279
 280         if (!dm_task_set_name (dmt, mpp->alias))
 281                 goto addout;
 282
 283         if (!dm_task_add_target (dmt, 0, mpp->size, target, params))
 284                 goto addout;
 285
 286         if (ro)
 287                 dm_task_set_ro(dmt);
 288
 289         if (task == DM_DEVICE_CREATE) {
 290                 if (strlen(mpp->wwid) > 0) {
 291                         prefixed_uuid = MALLOC(UUID_PREFIX_LEN +
 292                                                strlen(mpp->wwid) + 1);
 293                         if (!prefixed_uuid) {
 294                                 condlog(0, "cannot create prefixed uuid : %s",
 295                                         strerror(errno));
 296                                 goto addout;
 297                         }
 298                         sprintf(prefixed_uuid, UUID_PREFIX "%s", mpp->wwid);
 299                         if (!dm_task_set_uuid(dmt, prefixed_uuid))
 300                                 goto freeout;
 301                 }
 302                 dm_task_skip_lockfs(dmt);
 303 #ifdef LIBDM_API_FLUSH
 304                 dm_task_no_flush(dmt);
 305 #endif
 306         }
 307
 308         if (mpp->attribute_flags & (1 << ATTR_MODE) &&
 309             !dm_task_set_mode(dmt, mpp->mode))
 310                 goto freeout;
 311         if (mpp->attribute_flags & (1 << ATTR_UID) &&
 312             !dm_task_set_uid(dmt, mpp->uid))
 313                 goto freeout;
 314         if (mpp->attribute_flags & (1 << ATTR_GID) &&
 315             !dm_task_set_gid(dmt, mpp->gid))
 316                 goto freeout;
 317         condlog(4, "%s: %s [0 %llu %s %s]", mpp->alias,
 318                 task == DM_DEVICE_RELOAD ? "reload" : "addmap", mpp->size,
 319                 target, params);
 320
 321         dm_task_no_open_count(dmt);
 322
 323         if (task == DM_DEVICE_CREATE &&
 324             !dm_task_set_cookie(dmt, &cookie, udev_flags))
 325                 goto freeout;
 326
 327         r = dm_task_run (dmt);
 328
 329         if (task == DM_DEVICE_CREATE)
 330                         dm_udev_wait(cookie);
 331 freeout:
 332         if (prefixed_uuid)
 333                 FREE(prefixed_uuid);
 334
 335 addout:
 336         dm_task_destroy (dmt);
 337
 338         return r;
 339 }
 340
 341 extern int
 342 dm_addmap_create (struct multipath *mpp, char * params) {
 343         int ro;
 344
 345         for (ro = 0; ro <= 1; ro++) {
 346                 int err;
 347
 348                 if (dm_addmap(DM_DEVICE_CREATE, TGT_MPATH, mpp, params, ro,
 349                               mpp->skip_kpartx))
 350                         return 1;
 351                 /*
 352                  * DM_DEVICE_CREATE is actually DM_DEV_CREATE + DM_TABLE_LOAD.
 353                  * Failing the second part leaves an empty map. Clean it up.
 354                  */
 355                 err = errno;
 356                 if (dm_map_present(mpp->alias)) {
 357                         condlog(3, "%s: failed to load map (a path might be in use)", mpp->alias);
 358                         dm_flush_map_nosync(mpp->alias);
 359                 }
 360                 if (err != EROFS) {
 361                         condlog(3, "%s: failed to load map, error %d",
 362                                 mpp->alias, err);
 363                         break;
 364                 }
 365         }
 366         return 0;
 367 }
 368
 369 #define ADDMAP_RW 0
 370 #define ADDMAP_RO 1
 371
 372 extern int
 373 dm_addmap_reload (struct multipath *mpp, char *params, int flush)
 374 {
 375         int r;
 376         uint16_t udev_flags = (flush ? 0 : MPATH_UDEV_RELOAD_FLAG) |
 377                               ((mpp->skip_kpartx == SKIP_KPARTX_ON)?
 378                                MPATH_UDEV_NO_KPARTX_FLAG : 0);
 379
 380         /*
 381          * DM_DEVICE_RELOAD cannot wait on a cookie, as
 382          * the cookie will only ever be released after an
 383          * DM_DEVICE_RESUME. So call DM_DEVICE_RESUME
 384          * after each successful call to DM_DEVICE_RELOAD.
 385          */
 386         r = dm_addmap(DM_DEVICE_RELOAD, TGT_MPATH, mpp, params, ADDMAP_RW,
 387                       SKIP_KPARTX_OFF);
 388         if (!r) {
 389                 if (errno != EROFS)
 390                         return 0;
 391                 r = dm_addmap(DM_DEVICE_RELOAD, TGT_MPATH, mpp,
 392                               params, ADDMAP_RO, SKIP_KPARTX_OFF);
 393         }
 394         if (r)
 395                 r = dm_simplecmd(DM_DEVICE_RESUME, mpp->alias, flush,
 396                                  1, udev_flags, 0);
 397         return r;
 398 }
 399
 400 extern int
 401 dm_map_present (const char * str)
 402 {
 403         int r = 0;
 404         struct dm_task *dmt;
 405         struct dm_info info;
 406
 407         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
 408                 return 0;
 409
 410         if (!dm_task_set_name(dmt, str))
 411                 goto out;
 412
 413         dm_task_no_open_count(dmt);
 414
 415         if (!dm_task_run(dmt))
 416                 goto out;
 417
 418         if (!dm_task_get_info(dmt, &info))
 419                 goto out;
 420
 421         if (info.exists)
 422                 r = 1;
 423 out:
 424         dm_task_destroy(dmt);
 425         return r;
 426 }
 427
 428 extern int
 429 dm_get_map(const char * name, unsigned long long * size, char * outparams)
 430 {
 431         int r = 1;
 432         struct dm_task *dmt;
 433         uint64_t start, length;
 434         char *target_type = NULL;
 435         char *params = NULL;
 436
 437         if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
 438                 return 1;
 439
 440         if (!dm_task_set_name(dmt, name))
 441                 goto out;
 442
 443         dm_task_no_open_count(dmt);
 444
 445         if (!dm_task_run(dmt))
 446                 goto out;
 447
 448         /* Fetch 1st target */
 449         dm_get_next_target(dmt, NULL, &start, &length,
 450                            &target_type, &params);
 451
 452         if (size)
 453                 *size = length;
 454
 455         if (!outparams) {
 456                 r = 0;
 457                 goto out;
 458         }
 459         if (snprintf(outparams, PARAMS_SIZE, "%s", params) <= PARAMS_SIZE)
 460                 r = 0;
 461 out:
 462         dm_task_destroy(dmt);
 463         return r;
 464 }
 465
 466 static int
 467 dm_get_prefixed_uuid(const char *name, char *uuid)
 468 {
 469         struct dm_task *dmt;
 470         const char *uuidtmp;
 471         int r = 1;
 472
 473         dmt = dm_task_create(DM_DEVICE_INFO);
 474         if (!dmt)
 475                 return 1;
 476
 477         if (!dm_task_set_name (dmt, name))
 478                 goto uuidout;
 479
 480         if (!dm_task_run(dmt))
 481                 goto uuidout;
 482
 483         uuidtmp = dm_task_get_uuid(dmt);
 484         if (uuidtmp)
 485                 strcpy(uuid, uuidtmp);
 486         else
 487                 uuid[0] = '\0';
 488
 489         r = 0;
 490 uuidout:
 491         dm_task_destroy(dmt);
 492         return r;
 493 }
 494
 495 extern int
 496 dm_get_uuid(char *name, char *uuid)
 497 {
 498         char uuidtmp[WWID_SIZE];
 499
 500         if (dm_get_prefixed_uuid(name, uuidtmp))
 501                 return 1;
 502
 503         if (!strncmp(uuidtmp, UUID_PREFIX, UUID_PREFIX_LEN))
 504                 strcpy(uuid, uuidtmp + UUID_PREFIX_LEN);
 505         else
 506                 strcpy(uuid, uuidtmp);
 507
 508         return 0;
 509 }
 510
 511 /*
 512  * returns:
 513  *    0 : if both uuids end with same suffix which starts with UUID_PREFIX
 514  *    1 : otherwise
 515  */
 516 int
 517 dm_compare_uuid(const char* mapname1, const char* mapname2)
 518 {
 519         char *p1, *p2;
 520         char uuid1[WWID_SIZE], uuid2[WWID_SIZE];
 521
 522         if (dm_get_prefixed_uuid(mapname1, uuid1))
 523                 return 1;
 524
 525         if (dm_get_prefixed_uuid(mapname2, uuid2))
 526                 return 1;
 527
 528         p1 = strstr(uuid1, UUID_PREFIX);
 529         p2 = strstr(uuid2, UUID_PREFIX);
 530         if (p1 && p2 && !strcmp(p1, p2))
 531                 return 0;
 532
 533         return 1;
 534 }
 535
 536 extern int
 537 dm_get_status(char * name, char * outstatus)
 538 {
 539         int r = 1;
 540         struct dm_task *dmt;
 541         uint64_t start, length;
 542         char *target_type = NULL;
 543         char *status = NULL;
 544
 545         if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
 546                 return 1;
 547
 548         if (!dm_task_set_name(dmt, name))
 549                 goto out;
 550
 551         dm_task_no_open_count(dmt);
 552
 553         if (!dm_task_run(dmt))
 554                 goto out;
 555
 556         /* Fetch 1st target */
 557         dm_get_next_target(dmt, NULL, &start, &length,
 558                            &target_type, &status);
 559         if (!status) {
 560                 condlog(2, "get null status.");
 561                 goto out;
 562         }
 563
 564         if (snprintf(outstatus, PARAMS_SIZE, "%s", status) <= PARAMS_SIZE)
 565                 r = 0;
 566 out:
 567         if (r)
 568                 condlog(0, "%s: error getting map status string", name);
 569
 570         dm_task_destroy(dmt);
 571         return r;
 572 }
 573
 574 /*
 575  * returns:
 576  *    1 : match
 577  *    0 : no match
 578  *   -1 : empty map
 579  */
 580 extern int
 581 dm_type(const char * name, char * type)
 582 {
 583         int r = 0;
 584         struct dm_task *dmt;
 585         uint64_t start, length;
 586         char *target_type = NULL;
 587         char *params;
 588
 589         if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
 590                 return 0;
 591
 592         if (!dm_task_set_name(dmt, name))
 593                 goto out;
 594
 595         dm_task_no_open_count(dmt);
 596
 597         if (!dm_task_run(dmt))
 598                 goto out;
 599
 600         /* Fetch 1st target */
 601         dm_get_next_target(dmt, NULL, &start, &length,
 602                            &target_type, &params);
 603
 604         if (!target_type)
 605                 r = -1;
 606         else if (!strcmp(target_type, type))
 607                 r = 1;
 608
 609 out:
 610         dm_task_destroy(dmt);
 611         return r;
 612 }
 613
 614 extern int
 615 dm_is_mpath(const char * name)
 616 {
 617         int r = 0;
 618         struct dm_task *dmt;
 619         struct dm_info info;
 620         uint64_t start, length;
 621         char *target_type = NULL;
 622         char *params;
 623         const char *uuid;
 624
 625         if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
 626                 return 0;
 627
 628         if (!dm_task_set_name(dmt, name))
 629                 goto out;
 630
 631         dm_task_no_open_count(dmt);
 632
 633         if (!dm_task_run(dmt))
 634                 goto out;
 635
 636         if (!dm_task_get_info(dmt, &info) || !info.exists)
 637                 goto out;
 638
 639         uuid = dm_task_get_uuid(dmt);
 640
 641         if (!uuid || strncmp(uuid, UUID_PREFIX, UUID_PREFIX_LEN) != 0)
 642                 goto out;
 643
 644         /* Fetch 1st target */
 645         dm_get_next_target(dmt, NULL, &start, &length, &target_type, &params);
 646
 647         if (!target_type || strcmp(target_type, TGT_MPATH) != 0)
 648                 goto out;
 649
 650         r = 1;
 651 out:
 652         dm_task_destroy(dmt);
 653         return r;
 654 }
 655
 656 static int
 657 dm_dev_t (const char * mapname, char * dev_t, int len)
 658 {
 659         int r = 1;
 660         struct dm_task *dmt;
 661         struct dm_info info;
 662
 663         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
 664                 return 0;
 665
 666         if (!dm_task_set_name(dmt, mapname))
 667                 goto out;
 668
 669         if (!dm_task_run(dmt))
 670                 goto out;
 671
 672         if (!dm_task_get_info(dmt, &info) || !info.exists)
 673                 goto out;
 674
 675         if (snprintf(dev_t, len, "%i:%i", info.major, info.minor) > len)
 676                 goto out;
 677
 678         r = 0;
 679 out:
 680         dm_task_destroy(dmt);
 681         return r;
 682 }
 683
 684 int
 685 dm_get_opencount (const char * mapname)
 686 {
 687         int r = -1;
 688         struct dm_task *dmt;
 689         struct dm_info info;
 690
 691         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
 692                 return 0;
 693
 694         if (!dm_task_set_name(dmt, mapname))
 695                 goto out;
 696
 697         if (!dm_task_run(dmt))
 698                 goto out;
 699
 700         if (!dm_task_get_info(dmt, &info))
 701                 goto out;
 702
 703         if (!info.exists)
 704                 goto out;
 705
 706         r = info.open_count;
 707 out:
 708         dm_task_destroy(dmt);
 709         return r;
 710 }
 711
 712 int
 713 dm_get_major (char * mapname)
 714 {
 715         int r = -1;
 716         struct dm_task *dmt;
 717         struct dm_info info;
 718
 719         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
 720                 return 0;
 721
 722         if (!dm_task_set_name(dmt, mapname))
 723                 goto out;
 724
 725         if (!dm_task_run(dmt))
 726                 goto out;
 727
 728         if (!dm_task_get_info(dmt, &info))
 729                 goto out;
 730
 731         if (!info.exists)
 732                 goto out;
 733
 734         r = info.major;
 735 out:
 736         dm_task_destroy(dmt);
 737         return r;
 738 }
 739
 740 int
 741 dm_get_minor (char * mapname)
 742 {
 743         int r = -1;
 744         struct dm_task *dmt;
 745         struct dm_info info;
 746
 747         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
 748                 return 0;
 749
 750         if (!dm_task_set_name(dmt, mapname))
 751                 goto out;
 752
 753         if (!dm_task_run(dmt))
 754                 goto out;
 755
 756         if (!dm_task_get_info(dmt, &info))
 757                 goto out;
 758
 759         if (!info.exists)
 760                 goto out;
 761
 762         r = info.minor;
 763 out:
 764         dm_task_destroy(dmt);
 765         return r;
 766 }
 767
 768 static int
 769 has_partmap(const char *name, void *data)
 770 {
 771         return 1;
 772 }
 773
 774 static int
 775 partmap_in_use(const char *name, void *data)
 776 {
 777         int part_count, *ret_count = (int *)data;
 778         int open_count = dm_get_opencount(name);
 779
 780         if (ret_count)
 781                 (*ret_count)++;
 782         part_count = 0;
 783         if (open_count) {
 784                 if (do_foreach_partmaps(name, partmap_in_use, &part_count))
 785                         return 1;
 786                 if (open_count != part_count) {
 787                         condlog(2, "%s: map in use", name);
 788                         return 1;
 789                 }
 790         }
 791         return 0;
 792 }
 793
 794 extern int
 795 _dm_flush_map (const char * mapname, int need_sync, int deferred_remove)
 796 {
 797         int r;
 798
 799         if (!dm_is_mpath(mapname))
 800                 return 0; /* nothing to do */
 801
 802         /* If you aren't doing a deferred remove, make sure that no
 803          * devices are in use */
 804         if (!do_deferred(deferred_remove) && partmap_in_use(mapname, NULL))
 805                         return 1;
 806
 807         if (dm_remove_partmaps(mapname, need_sync, deferred_remove))
 808                 return 1;
 809
 810         if (!do_deferred(deferred_remove) && dm_get_opencount(mapname)) {
 811                 condlog(2, "%s: map in use", mapname);
 812                 return 1;
 813         }
 814
 815         r = dm_device_remove(mapname, need_sync, deferred_remove);
 816
 817         if (r) {
 818                 if (do_deferred(deferred_remove) && dm_map_present(mapname)) {
 819                         condlog(4, "multipath map %s remove deferred",
 820                                 mapname);
 821                         return 2;
 822                 }
 823                 condlog(4, "multipath map %s removed", mapname);
 824                 return 0;
 825         }
 826         return 1;
 827 }
 828
 829 #ifdef LIBDM_API_DEFERRED
 830
 831 int
 832 dm_flush_map_nopaths(const char * mapname, int deferred_remove)
 833 {
 834         return _dm_flush_map(mapname, 1, deferred_remove);
 835 }
 836
 837 #else
 838
 839 int
 840 dm_flush_map_nopaths(const char * mapname, int deferred_remove)
 841 {
 842         return _dm_flush_map(mapname, 1, 0);
 843 }
 844
 845 #endif
 846
 847 extern int
 848 dm_suspend_and_flush_map (const char * mapname)
 849 {
 850         int s = 0, queue_if_no_path = 0;
 851         unsigned long long mapsize;
 852         char params[PARAMS_SIZE] = {0};
 853         int udev_flags = 0;
 854
 855         if (!dm_is_mpath(mapname))
 856                 return 0; /* nothing to do */
 857
 858         /* if the device currently has no partitions, do not
 859            run kpartx on it if you fail to delete it */
 860         if (do_foreach_partmaps(mapname, has_partmap, NULL) == 0)
 861                 udev_flags |= MPATH_UDEV_NO_KPARTX_FLAG;
 862
 863         if (!dm_get_map(mapname, &mapsize, params)) {
 864                 if (strstr(params, "queue_if_no_path"))
 865                         queue_if_no_path = 1;
 866         }
 867
 868         if (queue_if_no_path)
 869                 s = dm_queue_if_no_path((char *)mapname, 0);
 870         /* Leave queue_if_no_path alone if unset failed */
 871         if (s)
 872                 queue_if_no_path = 0;
 873         else
 874                 s = dm_simplecmd_flush(DM_DEVICE_SUSPEND, mapname, 0);
 875
 876         if (!dm_flush_map(mapname)) {
 877                 condlog(4, "multipath map %s removed", mapname);
 878                 return 0;
 879         }
 880         condlog(2, "failed to remove multipath map %s", mapname);
 881         dm_simplecmd_noflush(DM_DEVICE_RESUME, mapname, udev_flags);
 882         if (queue_if_no_path)
 883                 s = dm_queue_if_no_path((char *)mapname, 1);
 884         return 1;
 885 }
 886
 887 extern int
 888 dm_flush_maps (void)
 889 {
 890         int r = 0;
 891         struct dm_task *dmt;
 892         struct dm_names *names;
 893         unsigned next = 0;
 894
 895         if (!(dmt = dm_task_create (DM_DEVICE_LIST)))
 896                 return 0;
 897
 898         dm_task_no_open_count(dmt);
 899
 900         if (!dm_task_run (dmt))
 901                 goto out;
 902
 903         if (!(names = dm_task_get_names (dmt)))
 904                 goto out;
 905
 906         if (!names->dev)
 907                 goto out;
 908
 909         do {
 910                 r |= dm_suspend_and_flush_map(names->name);
 911                 next = names->next;
 912                 names = (void *) names + next;
 913         } while (next);
 914
 915 out:
 916         dm_task_destroy (dmt);
 917         return r;
 918 }
 919
 920 int
 921 dm_message(const char * mapname, char * message)
 922 {
 923         int r = 1;
 924         struct dm_task *dmt;
 925
 926         if (!(dmt = dm_task_create(DM_DEVICE_TARGET_MSG)))
 927                 return 1;
 928
 929         if (!dm_task_set_name(dmt, mapname))
 930                 goto out;
 931
 932         if (!dm_task_set_sector(dmt, 0))
 933                 goto out;
 934
 935         if (!dm_task_set_message(dmt, message))
 936                 goto out;
 937
 938         dm_task_no_open_count(dmt);
 939
 940         if (!dm_task_run(dmt))
 941                 goto out;
 942
 943         r = 0;
 944 out:
 945         if (r)
 946                 condlog(0, "DM message failed [%s]", message);
 947
 948         dm_task_destroy(dmt);
 949         return r;
 950 }
 951
 952 int
 953 dm_fail_path(char * mapname, char * path)
 954 {
 955         char message[32];
 956
 957         if (snprintf(message, 32, "fail_path %s", path) > 32)
 958                 return 1;
 959
 960         return dm_message(mapname, message);
 961 }
 962
 963 int
 964 dm_reinstate_path(char * mapname, char * path)
 965 {
 966         char message[32];
 967
 968         if (snprintf(message, 32, "reinstate_path %s", path) > 32)
 969                 return 1;
 970
 971         return dm_message(mapname, message);
 972 }
 973
 974 int
 975 dm_queue_if_no_path(char *mapname, int enable)
 976 {
 977         char *message;
 978
 979         if (enable)
 980                 message = "queue_if_no_path";
 981         else
 982                 message = "fail_if_no_path";
 983
 984         return dm_message(mapname, message);
 985 }
 986
 987 static int
 988 dm_groupmsg (char * msg, char * mapname, int index)
 989 {
 990         char message[32];
 991
 992         if (snprintf(message, 32, "%s_group %i", msg, index) > 32)
 993                 return 1;
 994
 995         return dm_message(mapname, message);
 996 }
 997
 998 int
 999 dm_switchgroup(char * mapname, int index)
1000 {
1001         return dm_groupmsg("switch", mapname, index);
1002 }
1003
1004 int
1005 dm_enablegroup(char * mapname, int index)
1006 {
1007         return dm_groupmsg("enable", mapname, index);
1008 }
1009
1010 int
1011 dm_disablegroup(char * mapname, int index)
1012 {
1013         return dm_groupmsg("disable", mapname, index);
1014 }
1015
1016 int
1017 dm_get_maps (vector mp)
1018 {
1019         struct multipath * mpp;
1020         int r = 1;
1021         struct dm_task *dmt;
1022         struct dm_names *names;
1023         unsigned next = 0;
1024
1025         if (!mp)
1026                 return 1;
1027
1028         if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
1029                 return 1;
1030
1031         dm_task_no_open_count(dmt);
1032
1033         if (!dm_task_run(dmt))
1034                 goto out;
1035
1036         if (!(names = dm_task_get_names(dmt)))
1037                 goto out;
1038
1039         if (!names->dev) {
1040                 r = 0; /* this is perfectly valid */
1041                 goto out;
1042         }
1043
1044         do {
1045                 if (!dm_is_mpath(names->name))
1046                         goto next;
1047
1048                 mpp = alloc_multipath();
1049
1050                 if (!mpp)
1051                         goto out;
1052
1053                 mpp->alias = STRDUP(names->name);
1054
1055                 if (!mpp->alias)
1056                         goto out1;
1057
1058                 if (dm_get_map(names->name, &mpp->size, NULL))
1059                         goto out1;
1060
1061                 dm_get_uuid(names->name, mpp->wwid);
1062                 dm_get_info(names->name, &mpp->dmi);
1063
1064                 if (!vector_alloc_slot(mp))
1065                         goto out1;
1066
1067                 vector_set_slot(mp, mpp);
1068                 mpp = NULL;
1069 next:
1070                 next = names->next;
1071                 names = (void *) names + next;
1072         } while (next);
1073
1074         r = 0;
1075         goto out;
1076 out1:
1077         free_multipath(mpp, KEEP_PATHS);
1078 out:
1079         dm_task_destroy (dmt);
1080         return r;
1081 }
1082
1083 int
1084 dm_geteventnr (char *name)
1085 {
1086         struct dm_task *dmt;
1087         struct dm_info info;
1088         int event = -1;
1089
1090         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
1091                 return -1;
1092
1093         if (!dm_task_set_name(dmt, name))
1094                 goto out;
1095
1096         dm_task_no_open_count(dmt);
1097
1098         if (!dm_task_run(dmt))
1099                 goto out;
1100
1101         if (!dm_task_get_info(dmt, &info))
1102                 goto out;
1103
1104         if (info.exists)
1105                 event = info.event_nr;
1106
1107 out:
1108         dm_task_destroy(dmt);
1109
1110         return event;
1111 }
1112
1113 char *
1114 dm_mapname(int major, int minor)
1115 {
1116         char * response = NULL;
1117         const char *map;
1118         struct dm_task *dmt;
1119         int r;
1120         int loop = MAX_WAIT * LOOPS_PER_SEC;
1121
1122         if (!(dmt = dm_task_create(DM_DEVICE_STATUS)))
1123                 return NULL;
1124
1125         if (!dm_task_set_major(dmt, major) ||
1126             !dm_task_set_minor(dmt, minor))
1127                 goto bad;
1128
1129         dm_task_no_open_count(dmt);
1130
1131         /*
1132          * device map might not be ready when we get here from
1133          * daemon uev_trigger -> uev_add_map
1134          */
1135         while (--loop) {
1136                 r = dm_task_run(dmt);
1137
1138                 if (r)
1139                         break;
1140
1141                 usleep(1000 * 1000 / LOOPS_PER_SEC);
1142         }
1143
1144         if (!r) {
1145                 condlog(0, "%i:%i: timeout fetching map name", major, minor);
1146                 goto bad;
1147         }
1148
1149         map = dm_task_get_name(dmt);
1150         if (map && strlen(map))
1151                 response = STRDUP((char *)dm_task_get_name(dmt));
1152
1153         dm_task_destroy(dmt);
1154         return response;
1155 bad:
1156         dm_task_destroy(dmt);
1157         condlog(0, "%i:%i: error fetching map name", major, minor);
1158         return NULL;
1159 }
1160
1161 static int
1162 do_foreach_partmaps (const char * mapname,
1163                      int (*partmap_func)(const char *, void *),
1164                      void *data)
1165 {
1166         struct dm_task *dmt;
1167         struct dm_names *names;
1168         unsigned next = 0;
1169         char params[PARAMS_SIZE];
1170         unsigned long long size;
1171         char dev_t[32];
1172         int r = 1;
1173
1174         if (!(dmt = dm_task_create(DM_DEVICE_LIST)))
1175                 return 1;
1176
1177         dm_task_no_open_count(dmt);
1178
1179         if (!dm_task_run(dmt))
1180                 goto out;
1181
1182         if (!(names = dm_task_get_names(dmt)))
1183                 goto out;
1184
1185         if (!names->dev) {
1186                 r = 0; /* this is perfectly valid */
1187                 goto out;
1188         }
1189
1190         if (dm_dev_t(mapname, &dev_t[0], 32))
1191                 goto out;
1192
1193         do {
1194                 if (
1195                     /*
1196                      * if devmap target is "linear"
1197                      */
1198                     (dm_type(names->name, TGT_PART) > 0) &&
1199
1200                     /*
1201                      * and both uuid end with same suffix starting
1202                      * at UUID_PREFIX
1203                      */
1204                     (!dm_compare_uuid(names->name, mapname)) &&
1205
1206                     /*
1207                      * and we can fetch the map table from the kernel
1208                      */
1209                     !dm_get_map(names->name, &size, &params[0]) &&
1210
1211                     /*
1212                      * and the table maps over the multipath map
1213                      */
1214                     strstr(params, dev_t)
1215                    ) {
1216                         if (partmap_func(names->name, data) != 0)
1217                                 goto out;
1218                 }
1219
1220                 next = names->next;
1221                 names = (void *) names + next;
1222         } while (next);
1223
1224         r = 0;
1225 out:
1226         dm_task_destroy (dmt);
1227         return r;
1228 }
1229
1230 struct remove_data {
1231         int need_sync;
1232         int deferred_remove;
1233 };
1234
1235 static int
1236 remove_partmap(const char *name, void *data)
1237 {
1238         struct remove_data *rd = (struct remove_data *)data;
1239
1240         if (dm_get_opencount(name)) {
1241                 dm_remove_partmaps(name, rd->need_sync, rd->deferred_remove);
1242                 if (!do_deferred(rd->deferred_remove) &&
1243                     dm_get_opencount(name)) {
1244                         condlog(2, "%s: map in use", name);
1245                         return 1;
1246                 }
1247         }
1248         condlog(4, "partition map %s removed", name);
1249         dm_device_remove(name, rd->need_sync, rd->deferred_remove);
1250         return 0;
1251 }
1252
1253 int
1254 dm_remove_partmaps (const char * mapname, int need_sync, int deferred_remove)
1255 {
1256         struct remove_data rd = { need_sync, deferred_remove };
1257         return do_foreach_partmaps(mapname, remove_partmap, &rd);
1258 }
1259
1260 #ifdef LIBDM_API_DEFERRED
1261
1262 static int
1263 cancel_remove_partmap (const char *name, void *unused)
1264 {
1265         if (dm_get_opencount(name))
1266                 dm_cancel_remove_partmaps(name);
1267         if (dm_message(name, "@cancel_deferred_remove") != 0)
1268                 condlog(0, "%s: can't cancel deferred remove: %s", name,
1269                         strerror(errno));
1270         return 0;
1271 }
1272
1273 static int
1274 dm_get_deferred_remove (char * mapname)
1275 {
1276         int r = -1;
1277         struct dm_task *dmt;
1278         struct dm_info info;
1279
1280         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
1281                 return -1;
1282
1283         if (!dm_task_set_name(dmt, mapname))
1284                 goto out;
1285
1286         if (!dm_task_run(dmt))
1287                 goto out;
1288
1289         if (!dm_task_get_info(dmt, &info))
1290                 goto out;
1291
1292         r = info.deferred_remove;
1293 out:
1294         dm_task_destroy(dmt);
1295         return r;
1296 }
1297
1298 static int
1299 dm_cancel_remove_partmaps(const char * mapname) {
1300         return do_foreach_partmaps(mapname, cancel_remove_partmap, NULL);
1301 }
1302
1303 int
1304 dm_cancel_deferred_remove (struct multipath *mpp)
1305 {
1306         int r = 0;
1307
1308         if (!dm_get_deferred_remove(mpp->alias))
1309                 return 0;
1310         if (mpp->deferred_remove == DEFERRED_REMOVE_IN_PROGRESS)
1311                 mpp->deferred_remove = DEFERRED_REMOVE_ON;
1312
1313         dm_cancel_remove_partmaps(mpp->alias);
1314         r = dm_message(mpp->alias, "@cancel_deferred_remove");
1315         if (r)
1316                 condlog(0, "%s: can't cancel deferred remove: %s", mpp->alias,
1317                                 strerror(errno));
1318         else
1319                 condlog(2, "%s: canceled deferred remove", mpp->alias);
1320         return r;
1321 }
1322
1323 #else
1324
1325 int
1326 dm_cancel_deferred_remove (struct multipath *mpp)
1327 {
1328         return 0;
1329 }
1330
1331 #endif
1332
1333 static struct dm_info *
1334 alloc_dminfo (void)
1335 {
1336         return MALLOC(sizeof(struct dm_info));
1337 }
1338
1339 int
1340 dm_get_info (char * mapname, struct dm_info ** dmi)
1341 {
1342         int r = 1;
1343         struct dm_task *dmt = NULL;
1344
1345         if (!mapname)
1346                 return 1;
1347
1348         if (!*dmi)
1349                 *dmi = alloc_dminfo();
1350
1351         if (!*dmi)
1352                 return 1;
1353
1354         if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
1355                 goto out;
1356
1357         if (!dm_task_set_name(dmt, mapname))
1358                 goto out;
1359
1360         dm_task_no_open_count(dmt);
1361
1362         if (!dm_task_run(dmt))
1363                 goto out;
1364
1365         if (!dm_task_get_info(dmt, *dmi))
1366                 goto out;
1367
1368         r = 0;
1369 out:
1370         if (r) {
1371                 memset(*dmi, 0, sizeof(struct dm_info));
1372                 FREE(*dmi);
1373                 *dmi = NULL;
1374         }
1375
1376         if (dmt)
1377                 dm_task_destroy(dmt);
1378
1379         return r;
1380 }
1381
1382 struct rename_data {
1383         const char *old;
1384         char *new;
1385         char *delim;
1386 };
1387
1388 static int
1389 rename_partmap (const char *name, void *data)
1390 {
1391         char buff[PARAMS_SIZE];
1392         int offset;
1393         struct rename_data *rd = (struct rename_data *)data;
1394
1395         if (strncmp(name, rd->old, strlen(rd->old)) != 0)
1396                 return 0;
1397         for (offset = strlen(rd->old); name[offset] && !(isdigit(name[offset])); offset++); /* do nothing */
1398         snprintf(buff, PARAMS_SIZE, "%s%s%s", rd->new, rd->delim,
1399                  name + offset);
1400         dm_rename(name, buff, rd->delim, SKIP_KPARTX_OFF);
1401         condlog(4, "partition map %s renamed", name);
1402         return 0;
1403 }
1404
1405 int
1406 dm_rename_partmaps (const char * old, char * new, char *delim)
1407 {
1408         struct rename_data rd;
1409
1410         rd.old = old;
1411         rd.new = new;
1412
1413         if (delim)
1414                 rd.delim = delim;
1415         if (isdigit(new[strlen(new)-1]))
1416                 rd.delim = "p";
1417         else
1418                 rd.delim = "";
1419         return do_foreach_partmaps(old, rename_partmap, &rd);
1420 }
1421
1422 int
1423 dm_rename (const char * old, char * new, char *delim, int skip_kpartx)
1424 {
1425         int r = 0;
1426         struct dm_task *dmt;
1427         uint32_t cookie = 0;
1428         uint16_t udev_flags = DM_UDEV_DISABLE_LIBRARY_FALLBACK | ((skip_kpartx == SKIP_KPARTX_ON)? MPATH_UDEV_NO_KPARTX_FLAG : 0);
1429
1430         if (dm_rename_partmaps(old, new, delim))
1431                 return r;
1432
1433         if (!(dmt = dm_task_create(DM_DEVICE_RENAME)))
1434                 return r;
1435
1436         if (!dm_task_set_name(dmt, old))
1437                 goto out;
1438
1439         if (!dm_task_set_newname(dmt, new))
1440                 goto out;
1441
1442         dm_task_no_open_count(dmt);
1443
1444         if (!dm_task_set_cookie(dmt, &cookie, udev_flags))
1445                 goto out;
1446         r = dm_task_run(dmt);
1447
1448         dm_udev_wait(cookie);
1449
1450 out:
1451         dm_task_destroy(dmt);
1452
1453         return r;
1454 }
1455
1456 void dm_reassign_deps(char *table, char *dep, char *newdep)
1457 {
1458         char *p, *n;
1459         char *newtable;
1460
1461         newtable = strdup(table);
1462         if (!newtable)
1463                 return;
1464         p = strstr(newtable, dep);
1465         n = table + (p - newtable);
1466         strcpy(n, newdep);
1467         n += strlen(newdep);
1468         p += strlen(dep);
1469         strcat(n, p);
1470         free(newtable);
1471 }
1472
1473 int dm_reassign_table(const char *name, char *old, char *new)
1474 {
1475         int r = 0, modified = 0;
1476         uint64_t start, length;
1477         struct dm_task *dmt, *reload_dmt;
1478         char *target, *params = NULL;
1479         char *buff;
1480         void *next = NULL;
1481
1482         if (!(dmt = dm_task_create(DM_DEVICE_TABLE)))
1483                 return 0;
1484
1485         if (!dm_task_set_name(dmt, name))
1486                 goto out;
1487
1488         dm_task_no_open_count(dmt);
1489
1490         if (!dm_task_run(dmt))
1491                 goto out;
1492         if (!(reload_dmt = dm_task_create(DM_DEVICE_RELOAD)))
1493                 goto out;
1494         if (!dm_task_set_name(reload_dmt, name))
1495                 goto out_reload;
1496
1497         do {
1498                 next = dm_get_next_target(dmt, next, &start, &length,
1499                                           &target, &params);
1500                 buff = strdup(params);
1501                 if (!buff) {
1502                         condlog(3, "%s: failed to replace target %s, "
1503                                 "out of memory", name, target);
1504                         goto out_reload;
1505                 }
1506                 if (strcmp(target, TGT_MPATH) && strstr(params, old)) {
1507                         condlog(3, "%s: replace target %s %s",
1508                                 name, target, buff);
1509                         dm_reassign_deps(buff, old, new);
1510                         condlog(3, "%s: with target %s %s",
1511                                 name, target, buff);
1512                         modified++;
1513                 }
1514                 dm_task_add_target(reload_dmt, start, length, target, buff);
1515                 free(buff);
1516         } while (next);
1517
1518         if (modified) {
1519                 dm_task_no_open_count(reload_dmt);
1520
1521                 if (!dm_task_run(reload_dmt)) {
1522                         condlog(3, "%s: failed to reassign targets", name);
1523                         goto out_reload;
1524                 }
1525                 dm_simplecmd_noflush(DM_DEVICE_RESUME, name,
1526                                      MPATH_UDEV_RELOAD_FLAG);
1527         }
1528         r = 1;
1529
1530 out_reload:
1531         dm_task_destroy(reload_dmt);
1532 out:
1533         dm_task_destroy(dmt);
1534         return r;
1535 }
1536
1537
1538 /*
1539  * Reassign existing device-mapper table(s) to not use
1540  * the block devices but point to the multipathed
1541  * device instead
1542  */
1543 int dm_reassign(const char *mapname)
1544 {
1545         struct dm_deps *deps;
1546         struct dm_task *dmt;
1547         struct dm_info info;
1548         char dev_t[32], dm_dep[32];
1549         int r = 0, i;
1550
1551         if (dm_dev_t(mapname, &dev_t[0], 32)) {
1552                 condlog(3, "%s: failed to get device number", mapname);
1553                 return 1;
1554         }
1555
1556         if (!(dmt = dm_task_create(DM_DEVICE_DEPS))) {
1557                 condlog(3, "%s: couldn't make dm task", mapname);
1558                 return 0;
1559         }
1560
1561         if (!dm_task_set_name(dmt, mapname))
1562                 goto out;
1563
1564         dm_task_no_open_count(dmt);
1565
1566         if (!dm_task_run(dmt))
1567                 goto out;
1568
1569         if (!dm_task_get_info(dmt, &info))
1570                 goto out;
1571
1572         if (!(deps = dm_task_get_deps(dmt)))
1573                 goto out;
1574
1575         if (!info.exists)
1576                 goto out;
1577
1578         for (i = 0; i < deps->count; i++) {
1579                 sprintf(dm_dep, "%d:%d",
1580                         major(deps->device[i]),
1581                         minor(deps->device[i]));
1582                 sysfs_check_holders(dm_dep, dev_t);
1583         }
1584
1585         dm_task_destroy (dmt);
1586
1587         r = 1;
1588 out:
1589         return r;
1590 }
1591
1592 int dm_setgeometry(struct multipath *mpp)
1593 {
1594         struct dm_task *dmt;
1595         struct path *pp;
1596         char heads[4], sectors[4];
1597         char cylinders[10], start[32];
1598         int r = 0;
1599
1600         if (!mpp)
1601                 return 1;
1602
1603         pp = first_path(mpp);
1604         if (!pp) {
1605                 condlog(3, "%s: no path for geometry", mpp->alias);
1606                 return 1;
1607         }
1608         if (pp->geom.cylinders == 0 ||
1609             pp->geom.heads == 0 ||
1610             pp->geom.sectors == 0) {
1611                 condlog(3, "%s: invalid geometry on %s", mpp->alias, pp->dev);
1612                 return 1;
1613         }
1614
1615         if (!(dmt = dm_task_create(DM_DEVICE_SET_GEOMETRY)))
1616                 return 0;
1617
1618         if (!dm_task_set_name(dmt, mpp->alias))
1619                 goto out;
1620
1621         dm_task_no_open_count(dmt);
1622
1623         /* What a sick interface ... */
1624         snprintf(heads, 4, "%u", pp->geom.heads);
1625         snprintf(sectors, 4, "%u", pp->geom.sectors);
1626         snprintf(cylinders, 10, "%u", pp->geom.cylinders);
1627         snprintf(start, 32, "%lu", pp->geom.start);
1628         if (!dm_task_set_geometry(dmt, cylinders, heads, sectors, start)) {
1629                 condlog(3, "%s: Failed to set geometry", mpp->alias);
1630                 goto out;
1631         }
1632
1633         r = dm_task_run(dmt);
1634 out:
1635         dm_task_destroy(dmt);
1636
1637         return r;
1638 }