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