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