1 /* $NetBSD: libdm-nbsd-iface.c,v 1.6 2009/12/09 00:15:51 haad Exp $ */ 2 3 /* 4 * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved. 5 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved. 6 * Copyright (C) 2008 Adam Hamsik. All rights reserved. 7 * 8 * This file is part of the device-mapper userspace tools. 9 * 10 * This copyrighted material is made available to anyone wishing to use, 11 * modify, copy, or redistribute it subject to the terms and conditions 12 * of the GNU Lesser General Public License v.2.1. 13 * 14 * You should have received a copy of the GNU Lesser General Public License 15 * along with this program; if not, write to the Free Software Foundation, 16 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 17 */ 18 19 #include "dmlib.h" 20 #include "libdm-targets.h" 21 #include "libdm-common.h" 22 #include "libdm-netbsd.h" 23 24 #include <sys/ioctl.h> 25 #include <sys/sysctl.h> 26 27 #include <fcntl.h> 28 #include <dirent.h> 29 #include <limits.h> 30 31 #include <dev/dm/netbsd-dm.h> 32 33 #include <dm-ioctl.h> 34 35 #ifdef RUMP_ACTION 36 #include <rump/rump.h> 37 #include <rump/rump_syscalls.h> 38 #endif 39 40 /* 41 * Ensure build compatibility. 42 * The hard-coded versions here are the highest present 43 * in the _cmd_data arrays. 44 */ 45 46 #if !((DM_VERSION_MAJOR == 1 && DM_VERSION_MINOR >= 0) || \ 47 (DM_VERSION_MAJOR == 4 && DM_VERSION_MINOR >= 0)) 48 #error The version of dm-ioctl.h included is incompatible. 49 #endif 50 51 /* dm major version no for running kernel */ 52 static unsigned _dm_version_minor = 0; 53 static unsigned _dm_version_patchlevel = 0; 54 55 static int _control_fd = -1; 56 static int _version_checked = 0; 57 static int _version_ok = 1; 58 static unsigned _ioctl_buffer_double_factor = 0; 59 60 /* *INDENT-OFF* */ 61 62 /* 63 * XXX Remove this structure and write another own one 64 * I don't understand why ioctl calls has different 65 * names then dm task type 66 */ 67 static struct cmd_data _cmd_data_v4[] = { 68 {"create", DM_DEV_CREATE, {4, 0, 0}}, 69 {"reload", DM_TABLE_LOAD, {4, 0, 0}}, /* DM_DEVICE_RELOAD */ 70 {"remove", DM_DEV_REMOVE, {4, 0, 0}}, 71 {"remove_all", DM_REMOVE_ALL, {4, 0, 0}}, 72 {"suspend", DM_DEV_SUSPEND, {4, 0, 0}}, 73 {"resume", DM_DEV_SUSPEND, {4, 0, 0}}, 74 {"info", DM_DEV_STATUS, {4, 0, 0}}, 75 {"deps", DM_TABLE_DEPS, {4, 0, 0}}, /* DM_DEVICE_DEPS */ 76 {"rename", DM_DEV_RENAME, {4, 0, 0}}, 77 {"version", DM_VERSION, {4, 0, 0}}, 78 {"status", DM_TABLE_STATUS, {4, 0, 0}}, 79 {"table", DM_TABLE_STATUS, {4, 0, 0}}, /* DM_DEVICE_TABLE */ 80 {"waitevent", DM_DEV_WAIT, {4, 0, 0}}, 81 {"names", DM_LIST_DEVICES, {4, 0, 0}}, 82 {"clear", DM_TABLE_CLEAR, {4, 0, 0}}, 83 {"mknodes", DM_DEV_STATUS, {4, 0, 0}}, 84 #ifdef DM_LIST_VERSIONS 85 {"targets", DM_LIST_VERSIONS, {4, 1, 0}}, 86 #endif 87 #ifdef DM_TARGET_MSG 88 {"message", DM_TARGET_MSG, {4, 2, 0}}, 89 #endif 90 #ifdef DM_DEV_SET_GEOMETRY 91 {"setgeometry", DM_DEV_SET_GEOMETRY, {4, 6, 0}}, 92 #endif 93 }; 94 /* *INDENT-ON* */ 95 96 /* 97 * In NetBSD we use sysctl to get kernel drivers info. control device 98 * has predefined minor number 0 and major number = char major number 99 * of dm driver. First slot is therefore ocupied with control device 100 * and minor device starts from 1; 101 */ 102 103 static int _control_device_number(uint32_t *major, uint32_t *minor) 104 { 105 106 nbsd_get_dm_major(major, DM_CHAR_MAJOR); 107 108 *minor = 0; 109 110 return 1; 111 } 112 113 /* 114 * Returns 1 if exists; 0 if it doesn't; -1 if it's wrong 115 */ 116 static int _control_exists(const char *control, uint32_t major, uint32_t minor) 117 { 118 struct stat buf; 119 120 if (stat(control, &buf) < 0) { 121 if (errno != ENOENT) 122 log_sys_error("stat", control); 123 return 0; 124 } 125 126 if (!S_ISCHR(buf.st_mode)) { 127 log_verbose("%s: Wrong inode type", control); 128 if (!unlink(control)) 129 return 0; 130 log_sys_error("unlink", control); 131 return -1; 132 } 133 134 if (major && buf.st_rdev != MKDEV(major, minor)) { 135 log_verbose("%s: Wrong device number: (%u, %u) instead of " 136 "(%u, %u)", control, 137 MAJOR(buf.st_mode), MINOR(buf.st_mode), 138 major, minor); 139 if (!unlink(control)) 140 return 0; 141 log_sys_error("unlink", control); 142 return -1; 143 } 144 145 return 1; 146 } 147 148 static int _create_control(const char *control, uint32_t major, uint32_t minor) 149 { 150 int ret; 151 mode_t old_umask; 152 153 if (!major) 154 return 0; 155 156 old_umask = umask(0022); 157 ret = dm_create_dir(dm_dir()); 158 umask(old_umask); 159 160 if (!ret) 161 return 0; 162 163 log_verbose("Creating device %s (%u, %u)", control, major, minor); 164 165 if (mknod(control, S_IFCHR | S_IRUSR | S_IWUSR, 166 MKDEV(major, minor)) < 0) { 167 log_sys_error("mknod", control); 168 return 0; 169 } 170 171 172 return 1; 173 } 174 175 /* Check if major is device-mapper block device major number */ 176 int dm_is_dm_major(uint32_t major) 177 { 178 uint32_t dm_major; 179 180 nbsd_get_dm_major(&dm_major, DM_BLOCK_MAJOR); 181 182 if (major == dm_major) 183 return 1; 184 185 return 0; 186 } 187 188 /* Open control device if doesn't exist create it. */ 189 static int _open_control(void) 190 { 191 char control[PATH_MAX]; 192 uint32_t major = 0, minor = 0; 193 194 if (_control_fd != -1) 195 return 1; 196 197 #ifdef RUMP_ACTION 198 rump_init(); 199 #endif 200 snprintf(control, sizeof(control), "%s/control", dm_dir()); 201 202 if (!_control_device_number(&major, &minor)) 203 log_error("Is device-mapper driver missing from kernel?"); 204 205 if (!_control_exists(control, major, minor) && 206 !_create_control(control, major, minor)) 207 goto error; 208 209 if ((_control_fd = open(control, O_RDWR)) < 0) { 210 log_sys_error("open", control); 211 goto error; 212 } 213 214 return 1; 215 216 error: 217 log_error("Failure to communicate with kernel device-mapper driver."); 218 return 0; 219 } 220 221 /* 222 * Destroy dm task structure there are some dynamically alocated values there. 223 * name, uuid, head, tail list. 224 */ 225 void dm_task_destroy(struct dm_task *dmt) 226 { 227 struct target *t, *n; 228 229 for (t = dmt->head; t; t = n) { 230 n = t->next; 231 dm_free(t->params); 232 dm_free(t->type); 233 dm_free(t); 234 } 235 236 if (dmt->dev_name) 237 dm_free(dmt->dev_name); 238 239 if (dmt->newname) 240 dm_free(dmt->newname); 241 242 if (dmt->message) 243 dm_free(dmt->message); 244 245 if (dmt->dmi.v4) 246 dm_free(dmt->dmi.v4); 247 248 if (dmt->uuid) 249 dm_free(dmt->uuid); 250 251 dm_free(dmt); 252 253 } 254 255 /* Get kernel driver version from dm_ioctl structure. */ 256 int dm_task_get_driver_version(struct dm_task *dmt, char *version, size_t size) 257 { 258 unsigned *v; 259 260 if (!dmt->dmi.v4) { 261 version[0] = '\0'; 262 return 0; 263 } 264 265 v = dmt->dmi.v4->version; 266 snprintf(version, size, "%u.%u.%u", v[0], v[1], v[2]); 267 _dm_version_minor = v[1]; 268 _dm_version_patchlevel = v[2]; 269 270 return 1; 271 } 272 273 /* Get kernel driver protocol version and comapre it with library version. */ 274 static int _check_version(char *version, size_t size) 275 { 276 struct dm_task *task; 277 int r; 278 279 if (!(task = dm_task_create(DM_DEVICE_VERSION))) { 280 log_error("Failed to get device-mapper version"); 281 version[0] = '\0'; 282 return 0; 283 } 284 285 r = dm_task_run(task); 286 dm_task_get_driver_version(task, version, size); 287 dm_task_destroy(task); 288 289 return r; 290 } 291 292 /* 293 * Find out device-mapper's major version number the first time 294 * this is called and whether or not we support it. 295 */ 296 int dm_check_version(void) 297 { 298 char dmversion[64]; 299 300 if (_version_checked) 301 return _version_ok; 302 303 _version_checked = 1; 304 305 if (_check_version(dmversion, sizeof(dmversion))) 306 return 1; 307 308 309 return 0; 310 } 311 312 int dm_cookie_supported(void) 313 { 314 return (0); 315 } 316 317 /* Get next target(table description) from list pointed by dmt->head. */ 318 void *dm_get_next_target(struct dm_task *dmt, void *next, 319 uint64_t *start, uint64_t *length, 320 char **target_type, char **params) 321 { 322 struct target *t = (struct target *) next; 323 324 if (!t) 325 t = dmt->head; 326 327 if (!t) 328 return NULL; 329 330 *start = t->start; 331 *length = t->length; 332 *target_type = t->type; 333 *params = t->params; 334 335 return t->next; 336 } 337 338 /* Unmarshall the target info returned from a status call */ 339 static int _unmarshal_status(struct dm_task *dmt, struct dm_ioctl *dmi) 340 { 341 char *outbuf = (char *) dmi + dmi->data_start; 342 char *outptr = outbuf; 343 uint32_t i; 344 struct dm_target_spec *spec; 345 346 for (i = 0; i < dmi->target_count; i++) { 347 spec = (struct dm_target_spec *) outptr; 348 if (!dm_task_add_target(dmt, spec->sector_start, 349 spec->length, 350 spec->target_type, 351 outptr + sizeof(*spec))) { 352 return 0; 353 } 354 355 outptr = outbuf + spec->next; 356 } 357 358 return 1; 359 } 360 361 /* 362 * @dev_major is major number of char device 363 * 364 * I have to find it's block device number and lookup dev in 365 * device database to find device path. 366 * 367 */ 368 369 int dm_format_dev(char *buf, int bufsize, uint32_t dev_major, 370 uint32_t dev_minor) 371 { 372 int r; 373 uint32_t major, dm_major; 374 char *name; 375 mode_t mode; 376 dev_t dev; 377 size_t val_len,i; 378 struct kinfo_drivers *kd; 379 380 mode = 0; 381 382 nbsd_get_dm_major(&dm_major, DM_BLOCK_MAJOR); 383 384 if (bufsize < 8) 385 return 0; 386 387 if (sysctlbyname("kern.drivers",NULL,&val_len,NULL,0) < 0) { 388 printf("sysctlbyname failed"); 389 return 0; 390 } 391 392 if ((kd = malloc (val_len)) == NULL){ 393 printf("malloc kd info error\n"); 394 return 0; 395 } 396 397 if (sysctlbyname("kern.drivers", kd, &val_len, NULL, 0) < 0) { 398 printf("sysctlbyname failed kd"); 399 return 0; 400 } 401 402 for (i = 0, val_len /= sizeof(*kd); i < val_len; i++){ 403 if (kd[i].d_cmajor == dev_major) { 404 major = kd[i].d_bmajor; 405 break; 406 } 407 } 408 409 dev = MKDEV(major,dev_minor); 410 411 mode |= S_IFBLK; 412 413 name = devname(dev,mode); 414 415 r = snprintf(buf, (size_t) bufsize, "/dev/%s",name); 416 417 free(kd); 418 419 if (r < 0 || r > bufsize - 1 || name == NULL) 420 return 0; 421 422 return 1; 423 } 424 425 /* Fill info from dm_ioctl structure. Look at DM_EXISTS_FLAG*/ 426 int dm_task_get_info(struct dm_task *dmt, struct dm_info *info) 427 { 428 if (!dmt->dmi.v4) 429 return 0; 430 431 memset(info, 0, sizeof(*info)); 432 433 info->exists = dmt->dmi.v4->flags & DM_EXISTS_FLAG ? 1 : 0; 434 if (!info->exists) 435 return 1; 436 437 info->suspended = dmt->dmi.v4->flags & DM_SUSPEND_FLAG ? 1 : 0; 438 info->read_only = dmt->dmi.v4->flags & DM_READONLY_FLAG ? 1 : 0; 439 info->live_table = dmt->dmi.v4->flags & DM_ACTIVE_PRESENT_FLAG ? 1 : 0; 440 info->inactive_table = dmt->dmi.v4->flags & DM_INACTIVE_PRESENT_FLAG ? 441 1 : 0; 442 info->target_count = dmt->dmi.v4->target_count; 443 info->open_count = dmt->dmi.v4->open_count; 444 info->event_nr = dmt->dmi.v4->event_nr; 445 446 nbsd_get_dm_major(&info->major, DM_BLOCK_MAJOR); /* get netbsd dm device major number */ 447 info->minor = MINOR(dmt->dmi.v4->dev); 448 449 return 1; 450 } 451 452 /* Unsupported on NetBSD */ 453 uint32_t dm_task_get_read_ahead(const struct dm_task *dmt, uint32_t *read_ahead) 454 { 455 *read_ahead = DM_READ_AHEAD_NONE; 456 return 1; 457 } 458 459 const char *dm_task_get_name(const struct dm_task *dmt) 460 { 461 462 return (dmt->dmi.v4->name); 463 } 464 465 const char *dm_task_get_uuid(const struct dm_task *dmt) 466 { 467 468 return (dmt->dmi.v4->uuid); 469 } 470 471 struct dm_deps *dm_task_get_deps(struct dm_task *dmt) 472 { 473 return (struct dm_deps *) (((void *) dmt->dmi.v4) + 474 dmt->dmi.v4->data_start); 475 } 476 477 struct dm_names *dm_task_get_names(struct dm_task *dmt) 478 { 479 return (struct dm_names *) (((void *) dmt->dmi.v4) + 480 dmt->dmi.v4->data_start); 481 } 482 483 struct dm_versions *dm_task_get_versions(struct dm_task *dmt) 484 { 485 return (struct dm_versions *) (((void *) dmt->dmi.v4) + 486 dmt->dmi.v4->data_start); 487 } 488 489 int dm_task_set_ro(struct dm_task *dmt) 490 { 491 dmt->read_only = 1; 492 return 1; 493 } 494 495 /* Unsupported on NetBSD */ 496 int dm_task_set_read_ahead(struct dm_task *dmt, uint32_t read_ahead, 497 uint32_t read_ahead_flags) 498 { 499 return 1; 500 } 501 502 int dm_task_suppress_identical_reload(struct dm_task *dmt) 503 { 504 dmt->suppress_identical_reload = 1; 505 return 1; 506 } 507 508 int dm_task_set_newname(struct dm_task *dmt, const char *newname) 509 { 510 if (!(dmt->newname = dm_strdup(newname))) { 511 log_error("dm_task_set_newname: strdup(%s) failed", newname); 512 return 0; 513 } 514 515 return 1; 516 } 517 518 int dm_task_set_message(struct dm_task *dmt, const char *message) 519 { 520 if (!(dmt->message = dm_strdup(message))) { 521 log_error("dm_task_set_message: strdup(%s) failed", message); 522 return 0; 523 } 524 525 return 1; 526 } 527 528 int dm_task_set_sector(struct dm_task *dmt, uint64_t sector) 529 { 530 dmt->sector = sector; 531 532 return 1; 533 } 534 535 /* Unsupported in NetBSD */ 536 int dm_task_set_geometry(struct dm_task *dmt, const char *cylinders, 537 const char *heads, const char *sectors, const char *start) 538 { 539 return 0; 540 } 541 542 int dm_task_no_flush(struct dm_task *dmt) 543 { 544 dmt->no_flush = 1; 545 546 return 1; 547 } 548 549 int dm_task_no_open_count(struct dm_task *dmt) 550 { 551 dmt->no_open_count = 1; 552 553 return 1; 554 } 555 556 int dm_task_skip_lockfs(struct dm_task *dmt) 557 { 558 dmt->skip_lockfs = 1; 559 560 return 1; 561 } 562 563 int dm_task_query_inactive_table(struct dm_task *dmt) 564 { 565 dmt->query_inactive_table = 1; 566 567 return 1; 568 } 569 570 int dm_task_set_event_nr(struct dm_task *dmt, uint32_t event_nr) 571 { 572 dmt->event_nr = event_nr; 573 574 return 1; 575 } 576 577 /* Allocate one target(table description) entry. */ 578 struct target *create_target(uint64_t start, uint64_t len, const char *type, 579 const char *params) 580 { 581 struct target *t = dm_malloc(sizeof(*t)); 582 583 if (!t) { 584 log_error("create_target: malloc(%" PRIsize_t ") failed", 585 sizeof(*t)); 586 return NULL; 587 } 588 589 memset(t, 0, sizeof(*t)); 590 591 if (!(t->params = dm_strdup(params))) { 592 log_error("create_target: strdup(params) failed"); 593 goto bad; 594 } 595 596 if (!(t->type = dm_strdup(type))) { 597 log_error("create_target: strdup(type) failed"); 598 goto bad; 599 } 600 601 t->start = start; 602 t->length = len; 603 return t; 604 605 bad: 606 dm_free(t->params); 607 dm_free(t->type); 608 dm_free(t); 609 return NULL; 610 } 611 612 /* Parse given dm task structure to proplib dictionary. */ 613 static int _flatten(struct dm_task *dmt, prop_dictionary_t dm_dict) 614 { 615 prop_array_t cmd_array; 616 prop_dictionary_t target_spec; 617 618 struct target *t; 619 620 size_t len; 621 char type[DM_MAX_TYPE_NAME]; 622 623 uint32_t major, flags; 624 int count = 0; 625 const int (*version)[3]; 626 627 flags = 0; 628 version = &_cmd_data_v4[dmt->type].version; 629 630 cmd_array = prop_array_create(); 631 632 for (t = dmt->head; t; t = t->next) { 633 target_spec = prop_dictionary_create(); 634 635 prop_dictionary_set_uint64(target_spec,DM_TABLE_START,t->start); 636 prop_dictionary_set_uint64(target_spec,DM_TABLE_LENGTH,t->length); 637 638 strlcpy(type,t->type,DM_MAX_TYPE_NAME); 639 640 prop_dictionary_set_cstring(target_spec,DM_TABLE_TYPE,type); 641 prop_dictionary_set_cstring(target_spec,DM_TABLE_PARAMS,t->params); 642 643 prop_array_set(cmd_array,count,target_spec); 644 645 prop_object_release(target_spec); 646 647 count++; 648 } 649 650 651 if (count && (dmt->sector || dmt->message)) { 652 log_error("targets and message are incompatible"); 653 return -1; 654 } 655 656 if (count && dmt->newname) { 657 log_error("targets and newname are incompatible"); 658 return -1; 659 } 660 661 if (count && dmt->geometry) { 662 log_error("targets and geometry are incompatible"); 663 return -1; 664 } 665 666 if (dmt->newname && (dmt->sector || dmt->message)) { 667 log_error("message and newname are incompatible"); 668 return -1; 669 } 670 671 if (dmt->newname && dmt->geometry) { 672 log_error("geometry and newname are incompatible"); 673 return -1; 674 } 675 676 if (dmt->geometry && (dmt->sector || dmt->message)) { 677 log_error("geometry and message are incompatible"); 678 return -1; 679 } 680 681 if (dmt->sector && !dmt->message) { 682 log_error("message is required with sector"); 683 return -1; 684 } 685 686 if (dmt->newname) 687 len += strlen(dmt->newname) + 1; 688 689 if (dmt->message) 690 len += sizeof(struct dm_target_msg) + strlen(dmt->message) + 1; 691 692 if (dmt->geometry) 693 len += strlen(dmt->geometry) + 1; 694 695 nbsd_dmi_add_version((*version), dm_dict); 696 697 nbsd_get_dm_major(&major, DM_BLOCK_MAJOR); 698 /* 699 * Only devices with major which is equal to netbsd dm major 700 * dm devices in NetBSD can't have more majors then one assigned to dm. 701 */ 702 if (dmt->major != major && dmt->major != -1) 703 return -1; 704 705 if (dmt->minor >= 0) { 706 flags |= DM_PERSISTENT_DEV_FLAG; 707 708 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmt->minor); 709 } 710 711 /* Set values to dictionary. */ 712 if (dmt->dev_name) 713 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmt->dev_name); 714 715 if (dmt->uuid) 716 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmt->uuid); 717 718 if (dmt->type == DM_DEVICE_SUSPEND) 719 flags |= DM_SUSPEND_FLAG; 720 if (dmt->no_flush) 721 flags |= DM_NOFLUSH_FLAG; 722 if (dmt->read_only) 723 flags |= DM_READONLY_FLAG; 724 if (dmt->skip_lockfs) 725 flags |= DM_SKIP_LOCKFS_FLAG; 726 727 if (dmt->query_inactive_table) { 728 if (_dm_version_minor < 16) 729 log_warn("WARNING: Inactive table query unsupported " 730 "by kernel. It will use live table."); 731 flags |= DM_QUERY_INACTIVE_TABLE_FLAG; 732 } 733 734 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags); 735 736 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_EVENT, dmt->event_nr); 737 738 if (dmt->newname) 739 prop_array_set_cstring(cmd_array, 0, dmt->newname); 740 741 /* Add array for all COMMAND specific data. */ 742 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); 743 prop_object_release(cmd_array); 744 745 return 0; 746 } 747 748 static int _process_mapper_dir(struct dm_task *dmt) 749 { 750 struct dirent *dirent; 751 DIR *d; 752 const char *dir; 753 int r = 1; 754 755 dir = dm_dir(); 756 if (!(d = opendir(dir))) { 757 log_sys_error("opendir", dir); 758 return 0; 759 } 760 761 while ((dirent = readdir(d))) { 762 if (!strcmp(dirent->d_name, ".") || 763 !strcmp(dirent->d_name, "..") || 764 !strcmp(dirent->d_name, "control")) 765 continue; 766 dm_task_set_name(dmt, dirent->d_name); 767 dm_task_run(dmt); 768 } 769 770 if (closedir(d)) 771 log_sys_error("closedir", dir); 772 773 return r; 774 } 775 776 /* Get list of all devices. */ 777 static int _process_all_v4(struct dm_task *dmt) 778 { 779 struct dm_task *task; 780 struct dm_names *names; 781 unsigned next = 0; 782 int r = 1; 783 784 if (!(task = dm_task_create(DM_DEVICE_LIST))) 785 return 0; 786 787 if (!dm_task_run(task)) { 788 r = 0; 789 goto out; 790 } 791 792 if (!(names = dm_task_get_names(task))) { 793 r = 0; 794 goto out; 795 } 796 797 if (!names->dev) 798 goto out; 799 800 do { 801 names = (void *) names + next; 802 if (!dm_task_set_name(dmt, names->name)) { 803 r = 0; 804 goto out; 805 } 806 if (!dm_task_run(dmt)) 807 r = 0; 808 next = names->next; 809 } while (next); 810 811 out: 812 dm_task_destroy(task); 813 return r; 814 } 815 816 static int _mknodes_v4(struct dm_task *dmt) 817 { 818 (void) _process_mapper_dir(dmt); 819 820 return _process_all_v4(dmt); 821 } 822 823 /* Create new device and load table to it. */ 824 static int _create_and_load_v4(struct dm_task *dmt) 825 { 826 struct dm_task *task; 827 int r; 828 829 printf("create and load called \n"); 830 831 /* Use new task struct to create the device */ 832 if (!(task = dm_task_create(DM_DEVICE_CREATE))) { 833 log_error("Failed to create device-mapper task struct"); 834 return 0; 835 } 836 837 /* Copy across relevant fields */ 838 if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) { 839 dm_task_destroy(task); 840 return 0; 841 } 842 843 if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) { 844 dm_task_destroy(task); 845 return 0; 846 } 847 848 task->major = dmt->major; 849 task->minor = dmt->minor; 850 task->uid = dmt->uid; 851 task->gid = dmt->gid; 852 task->mode = dmt->mode; 853 854 r = dm_task_run(task); 855 dm_task_destroy(task); 856 if (!r) 857 return r; 858 859 /* Next load the table */ 860 if (!(task = dm_task_create(DM_DEVICE_RELOAD))) { 861 log_error("Failed to create device-mapper task struct"); 862 return 0; 863 } 864 865 /* Copy across relevant fields */ 866 if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) { 867 dm_task_destroy(task); 868 return 0; 869 } 870 871 task->read_only = dmt->read_only; 872 task->head = dmt->head; 873 task->tail = dmt->tail; 874 875 r = dm_task_run(task); 876 877 task->head = NULL; 878 task->tail = NULL; 879 dm_task_destroy(task); 880 if (!r) 881 goto revert; 882 883 /* Use the original structure last so the info will be correct */ 884 dmt->type = DM_DEVICE_RESUME; 885 dm_free(dmt->uuid); 886 dmt->uuid = NULL; 887 888 r = dm_task_run(dmt); 889 890 if (r) 891 return r; 892 893 revert: 894 dmt->type = DM_DEVICE_REMOVE; 895 dm_free(dmt->uuid); 896 dmt->uuid = NULL; 897 898 if (!dm_task_run(dmt)) 899 log_error("Failed to revert device creation."); 900 901 return r; 902 } 903 904 uint64_t dm_task_get_existing_table_size(struct dm_task *dmt) 905 { 906 return dmt->existing_table_size; 907 } 908 909 static int _reload_with_suppression_v4(struct dm_task *dmt) 910 { 911 struct dm_task *task; 912 struct target *t1, *t2; 913 int r; 914 915 /* New task to get existing table information */ 916 if (!(task = dm_task_create(DM_DEVICE_TABLE))) { 917 log_error("Failed to create device-mapper task struct"); 918 return 0; 919 } 920 921 /* Copy across relevant fields */ 922 if (dmt->dev_name && !dm_task_set_name(task, dmt->dev_name)) { 923 dm_task_destroy(task); 924 return 0; 925 } 926 927 if (dmt->uuid && !dm_task_set_uuid(task, dmt->uuid)) { 928 dm_task_destroy(task); 929 return 0; 930 } 931 932 task->major = dmt->major; 933 task->minor = dmt->minor; 934 935 r = dm_task_run(task); 936 937 if (!r) { 938 dm_task_destroy(task); 939 return r; 940 } 941 942 /* Store existing table size */ 943 t2 = task->head; 944 while (t2 && t2->next) 945 t2 = t2->next; 946 dmt->existing_table_size = t2 ? t2->start + t2->length : 0; 947 948 if ((task->dmi.v4->flags & DM_READONLY_FLAG) ? 1 : 0 != dmt->read_only) 949 goto no_match; 950 951 t1 = dmt->head; 952 t2 = task->head; 953 954 while (t1 && t2) { 955 while (t2->params[strlen(t2->params) - 1] == ' ') 956 t2->params[strlen(t2->params) - 1] = '\0'; 957 if ((t1->start != t2->start) || 958 (t1->length != t2->length) || 959 (strcmp(t1->type, t2->type)) || 960 (strcmp(t1->params, t2->params))) 961 goto no_match; 962 t1 = t1->next; 963 t2 = t2->next; 964 } 965 966 if (!t1 && !t2) { 967 dmt->dmi.v4 = task->dmi.v4; 968 task->dmi.v4 = NULL; 969 dm_task_destroy(task); 970 return 1; 971 } 972 973 no_match: 974 dm_task_destroy(task); 975 976 /* Now do the original reload */ 977 dmt->suppress_identical_reload = 0; 978 r = dm_task_run(dmt); 979 980 return r; 981 } 982 983 /* 984 * This function is heart of NetBSD libdevmapper-> device-mapper kernel protocol 985 * It creates proplib_dictionary from dm task structure and sends it to NetBSD 986 * kernel driver. After succesfull ioctl it create dmi structure from returned 987 * proplib dictionary. This way I keep number of changes in NetBSD version of 988 * libdevmapper as small as posible. 989 */ 990 static struct dm_ioctl *_do_dm_ioctl(struct dm_task *dmt, unsigned command) 991 { 992 struct dm_ioctl *dmi; 993 prop_dictionary_t dm_dict_in, dm_dict_out; 994 995 uint32_t flags; 996 997 dm_dict_in = NULL; 998 999 dm_dict_in = prop_dictionary_create(); /* Dictionary send to kernel */ 1000 dm_dict_out = prop_dictionary_create(); /* Dictionary received from kernel */ 1001 1002 /* Set command name to dictionary */ 1003 prop_dictionary_set_cstring(dm_dict_in, DM_IOCTL_COMMAND, 1004 _cmd_data_v4[dmt->type].name); 1005 1006 /* Parse dmi from libdevmapper to dictionary */ 1007 if (_flatten(dmt, dm_dict_in) < 0) 1008 goto bad; 1009 1010 prop_dictionary_get_uint32(dm_dict_in, DM_IOCTL_FLAGS, &flags); 1011 1012 if (dmt->type == DM_DEVICE_TABLE) 1013 flags |= DM_STATUS_TABLE_FLAG; 1014 1015 if (dmt->no_open_count) 1016 flags |= DM_SKIP_BDGET_FLAG; 1017 1018 flags |= DM_EXISTS_FLAG; 1019 1020 /* Set flags to dictionary. */ 1021 prop_dictionary_set_uint32(dm_dict_in,DM_IOCTL_FLAGS,flags); 1022 1023 prop_dictionary_externalize_to_file(dm_dict_in,"/tmp/test_in"); 1024 1025 log_very_verbose("Ioctl type %s --- flags %d",_cmd_data_v4[dmt->type].name,flags); 1026 //printf("name %s, major %d minor %d\n uuid %s\n", 1027 //dm_task_get_name(dmt), dmt->minor, dmt->major, dm_task_get_uuid(dmt)); 1028 /* Send dictionary to kernel and wait for reply. */ 1029 #ifdef RUMP_ACTION 1030 struct plistref prefp; 1031 int err; 1032 prop_dictionary_externalize_to_pref(dm_dict_in, &prefp); 1033 1034 if (rump_sys_ioctl(_control_fd, NETBSD_DM_IOCTL, &prefp) != 0) { 1035 1036 dm_dict_out = prop_dictionary_internalize(prefp.pref_plist); 1037 #else 1038 if (prop_dictionary_sendrecv_ioctl(dm_dict_in,_control_fd, 1039 NETBSD_DM_IOCTL,&dm_dict_out) != 0) { 1040 #endif 1041 if (errno == ENOENT && 1042 ((dmt->type == DM_DEVICE_INFO) || 1043 (dmt->type == DM_DEVICE_MKNODES) || 1044 (dmt->type == DM_DEVICE_STATUS))) { 1045 1046 /* 1047 * Linux version doesn't fail when ENOENT is returned 1048 * for nonexisting device after info, deps, mknodes call. 1049 * It returns dmi sent to kernel with DM_EXISTS_FLAG = 0; 1050 */ 1051 1052 dmi = nbsd_dm_dict_to_dmi(dm_dict_in,_cmd_data_v4[dmt->type].cmd); 1053 1054 dmi->flags &= ~DM_EXISTS_FLAG; 1055 1056 prop_object_release(dm_dict_in); 1057 prop_object_release(dm_dict_out); 1058 1059 goto out; 1060 } else { 1061 log_error("ioctl %s call failed with errno %d\n", 1062 _cmd_data_v4[dmt->type].name, errno); 1063 1064 prop_object_release(dm_dict_in); 1065 prop_object_release(dm_dict_out); 1066 1067 goto bad; 1068 } 1069 } 1070 1071 #ifdef RUMP_ACTION 1072 dm_dict_out = prop_dictionary_internalize(prefp.pref_plist); 1073 #endif 1074 prop_dictionary_externalize_to_file(dm_dict_out,"/tmp/test_out"); 1075 1076 /* Parse kernel dictionary to dmi structure and return it to libdevmapper. */ 1077 dmi = nbsd_dm_dict_to_dmi(dm_dict_out,_cmd_data_v4[dmt->type].cmd); 1078 1079 prop_object_release(dm_dict_in); 1080 prop_object_release(dm_dict_out); 1081 out: 1082 return dmi; 1083 bad: 1084 return NULL; 1085 } 1086 1087 /* Create new edvice nodes in mapper/ dir. */ 1088 void dm_task_update_nodes(void) 1089 { 1090 update_devs(); 1091 } 1092 1093 /* Run dm command which is descirbed in dm_task structure. */ 1094 int dm_task_run(struct dm_task *dmt) 1095 { 1096 struct dm_ioctl *dmi; 1097 unsigned command; 1098 1099 if ((unsigned) dmt->type >= 1100 (sizeof(_cmd_data_v4) / sizeof(*_cmd_data_v4))) { 1101 log_error("Internal error: unknown device-mapper task %d", 1102 dmt->type); 1103 return 0; 1104 } 1105 1106 command = _cmd_data_v4[dmt->type].cmd; 1107 1108 /* Old-style creation had a table supplied */ 1109 if (dmt->type == DM_DEVICE_CREATE && dmt->head) 1110 return _create_and_load_v4(dmt); 1111 1112 if (dmt->type == DM_DEVICE_MKNODES && !dmt->dev_name && 1113 !dmt->uuid && dmt->major <= 0) 1114 return _mknodes_v4(dmt); 1115 1116 if ((dmt->type == DM_DEVICE_RELOAD) && dmt->suppress_identical_reload) 1117 return _reload_with_suppression_v4(dmt); 1118 1119 if (!_open_control()) 1120 return 0; 1121 1122 if (!(dmi = _do_dm_ioctl(dmt, command))) 1123 return 0; 1124 1125 switch (dmt->type) { 1126 case DM_DEVICE_CREATE: 1127 add_dev_node(dmt->dev_name, MAJOR(dmi->dev), MINOR(dmi->dev), 1128 dmt->uid, dmt->gid, dmt->mode, 0); 1129 break; 1130 1131 case DM_DEVICE_REMOVE: 1132 /* FIXME Kernel needs to fill in dmi->name */ 1133 if (dmt->dev_name) 1134 rm_dev_node(dmt->dev_name, 0); 1135 break; 1136 1137 case DM_DEVICE_RENAME: 1138 /* FIXME Kernel needs to fill in dmi->name */ 1139 if (dmt->dev_name) 1140 rename_dev_node(dmt->dev_name, dmt->newname, 0); 1141 break; 1142 1143 case DM_DEVICE_RESUME: 1144 /* FIXME Kernel needs to fill in dmi->name */ 1145 set_dev_node_read_ahead(dmt->dev_name, dmt->read_ahead, 1146 dmt->read_ahead_flags); 1147 break; 1148 1149 case DM_DEVICE_MKNODES: 1150 if (dmi->flags & DM_EXISTS_FLAG) 1151 add_dev_node(dmi->name, MAJOR(dmi->dev), 1152 MINOR(dmi->dev), 1153 dmt->uid, dmt->gid, dmt->mode, 0); 1154 else if (dmt->dev_name) 1155 rm_dev_node(dmt->dev_name, 0); 1156 break; 1157 1158 case DM_DEVICE_STATUS: 1159 case DM_DEVICE_TABLE: 1160 case DM_DEVICE_WAITEVENT: 1161 if (!_unmarshal_status(dmt, dmi)) 1162 goto bad; 1163 break; 1164 } 1165 1166 /* Was structure reused? */ 1167 if (dmt->dmi.v4) 1168 dm_free(dmt->dmi.v4); 1169 1170 dmt->dmi.v4 = dmi; 1171 return 1; 1172 1173 bad: 1174 dm_free(dmi); 1175 return 0; 1176 } 1177 1178 void dm_lib_release(void) 1179 { 1180 if (_control_fd != -1) { 1181 close(_control_fd); 1182 _control_fd = -1; 1183 } 1184 update_devs(); 1185 } 1186 1187 void dm_lib_exit(void) 1188 { 1189 dm_lib_release(); 1190 dm_dump_memory(); 1191 _version_ok = 1; 1192 _version_checked = 0; 1193 } 1194