1 /* $NetBSD: dm_ioctl.c,v 1.57 2024/01/14 07:56:53 mlelstv Exp $ */ 2 3 /* 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Adam Hamsik. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: dm_ioctl.c,v 1.57 2024/01/14 07:56:53 mlelstv Exp $"); 33 34 /* 35 * Locking is used to synchronise between ioctl calls and between dm_table's 36 * users. 37 * 38 * ioctl locking: 39 * Simple reference counting, to count users of device will be used routines 40 * dm_dev_busy/dm_dev_unbusy are used for that. 41 * dm_dev_lookup/dm_dev_rem call dm_dev_busy before return(caller is therefore 42 * holder of reference_counter last). 43 * 44 * ioctl routines which change/remove dm_dev parameters must wait on 45 * dm_dev::dev_cv and when last user will call dm_dev_unbusy they will wake 46 * up them. 47 * 48 * table_head locking: 49 * To access table entries dm_table_* routines must be used. 50 * 51 * dm_table_get_entry will increment table users reference 52 * counter. It will return active or inactive table depends 53 * on uint8_t argument. 54 * 55 * dm_table_release must be called for every table_entry from 56 * dm_table_get_entry. Between these two calls tables can't be switched 57 * or destroyed. 58 * 59 * dm_table_head_init initialize table_entries SLISTS and io_cv. 60 * 61 * dm_table_head_destroy destroy cv. 62 * 63 * There are two types of users for dm_table_head first type will 64 * only read list and try to do anything with it e.g. dmstrategy, 65 * dm_table_size etc. There is another user for table_head which wants 66 * to change table lists e.g. dm_dev_resume_ioctl, dm_dev_remove_ioctl, 67 * dm_table_clear_ioctl. 68 * 69 * NOTE: It is not allowed to call dm_table_destroy, dm_table_switch_tables 70 * with hold table reference counter. Table reference counter is hold 71 * after calling dm_table_get_entry routine. After calling this 72 * function user must call dm_table_release before any writer table 73 * operation. 74 * 75 * Example: dm_table_get_entry 76 * dm_table_destroy/dm_table_switch_tables 77 * This example will lead to deadlock situation because after dm_table_get_entry 78 * table reference counter is != 0 and dm_table_destroy have to wait on cv until 79 * reference counter is 0. 80 * 81 */ 82 83 #include <sys/types.h> 84 #include <sys/param.h> 85 #include <sys/device.h> 86 #include <sys/disk.h> 87 #include <sys/disklabel.h> 88 #include <sys/kmem.h> 89 #include <sys/malloc.h> 90 91 #include <machine/int_fmtio.h> 92 93 #include "netbsd-dm.h" 94 #include "dm.h" 95 #include "ioconf.h" 96 97 extern struct cfattach dm_ca; 98 static uint32_t sc_minor_num; 99 uint32_t dm_dev_counter; 100 101 #define DM_REMOVE_FLAG(flag, name) do { \ 102 prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \ 103 flag &= ~name; \ 104 prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \ 105 } while (/*CONSTCOND*/0) 106 107 #define DM_ADD_FLAG(flag, name) do { \ 108 prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \ 109 flag |= name; \ 110 prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \ 111 } while (/*CONSTCOND*/0) 112 113 static int dm_table_deps(dm_table_entry_t *, prop_array_t); 114 static int dm_table_init(dm_target_t *, dm_table_entry_t *, char *); 115 116 /* 117 * Print flags sent to the kernel from libdevmapper. 118 */ 119 static int 120 dm_dbg_print_flags(uint32_t flags) 121 { 122 123 aprint_debug("dbg_print --- %d\n", flags); 124 125 if (flags & DM_READONLY_FLAG) 126 aprint_debug("dbg_flags: DM_READONLY_FLAG set In/Out\n"); 127 128 if (flags & DM_SUSPEND_FLAG) 129 aprint_debug("dbg_flags: DM_SUSPEND_FLAG set In/Out\n"); 130 131 if (flags & DM_PERSISTENT_DEV_FLAG) 132 aprint_debug("dbg_flags: DM_PERSISTENT_DEV_FLAG set In\n"); 133 134 if (flags & DM_STATUS_TABLE_FLAG) 135 aprint_debug("dbg_flags: DM_STATUS_TABLE_FLAG set In\n"); 136 137 if (flags & DM_ACTIVE_PRESENT_FLAG) 138 aprint_debug("dbg_flags: DM_ACTIVE_PRESENT_FLAG set Out\n"); 139 140 if (flags & DM_INACTIVE_PRESENT_FLAG) 141 aprint_debug("dbg_flags: DM_INACTIVE_PRESENT_FLAG set Out\n"); 142 143 if (flags & DM_BUFFER_FULL_FLAG) 144 aprint_debug("dbg_flags: DM_BUFFER_FULL_FLAG set Out\n"); 145 146 if (flags & DM_SKIP_BDGET_FLAG) 147 aprint_debug("dbg_flags: DM_SKIP_BDGET_FLAG set In\n"); 148 149 if (flags & DM_SKIP_LOCKFS_FLAG) 150 aprint_debug("dbg_flags: DM_SKIP_LOCKFS_FLAG set In\n"); 151 152 if (flags & DM_NOFLUSH_FLAG) 153 aprint_debug("dbg_flags: DM_NOFLUSH_FLAG set In\n"); 154 155 return 0; 156 } 157 158 /* 159 * Get list of all available targets from global 160 * target list and sent them back to libdevmapper. 161 */ 162 int 163 dm_list_versions_ioctl(prop_dictionary_t dm_dict) 164 { 165 prop_array_t target_list; 166 uint32_t flags; 167 168 flags = 0; 169 170 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 171 172 dm_dbg_print_flags(flags); 173 target_list = dm_target_prop_list(); 174 175 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, target_list); 176 prop_object_release(target_list); 177 178 return 0; 179 } 180 181 /* 182 * Create in-kernel entry for device. Device attributes such as name, uuid are 183 * taken from proplib dictionary. 184 */ 185 int 186 dm_dev_create_ioctl(prop_dictionary_t dm_dict) 187 { 188 dm_dev_t *dmv; 189 const char *name, *uuid; 190 int r; 191 uint32_t flags; 192 device_t devt; 193 cfdata_t cf; 194 195 flags = 0; 196 name = NULL; 197 uuid = NULL; 198 199 /* Get needed values from dictionary. */ 200 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 201 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 202 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 203 204 dm_dbg_print_flags(flags); 205 206 /* Lookup name and uuid if device already exist quit. */ 207 if ((dmv = dm_dev_lookup(name, uuid, -1)) != NULL) { 208 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); /* Device already exists */ 209 dm_dev_unbusy(dmv); 210 return EEXIST; 211 } 212 213 if ((dmv = dm_dev_alloc()) == NULL) 214 return ENOMEM; 215 216 cf = kmem_alloc(sizeof(*cf), KM_SLEEP); 217 cf->cf_name = dm_cd.cd_name; 218 cf->cf_atname = dm_ca.ca_name; 219 cf->cf_unit = atomic_inc_32_nv(&sc_minor_num); 220 cf->cf_fstate = FSTATE_NOTFOUND; 221 if ((devt = config_attach_pseudo(cf)) == NULL) { 222 dm_dev_free(dmv); 223 kmem_free(cf, sizeof(*cf)); 224 aprint_error("Unable to attach pseudo device dm/%s\n", name); 225 return (ENOMEM); 226 } 227 228 if (uuid) 229 strncpy(dmv->uuid, uuid, DM_UUID_LEN); 230 else 231 dmv->uuid[0] = '\0'; 232 233 if (name) 234 strlcpy(dmv->name, name, DM_NAME_LEN); 235 236 dmv->minor = cf->cf_unit; 237 dmv->flags = 0; /* device flags are set when needed */ 238 dmv->ref_cnt = 0; 239 dmv->event_nr = 0; 240 dmv->devt = devt; 241 242 dm_table_head_init(&dmv->table_head); 243 244 mutex_init(&dmv->dev_mtx, MUTEX_DEFAULT, IPL_NONE); 245 mutex_init(&dmv->diskp_mtx, MUTEX_DEFAULT, IPL_NONE); 246 cv_init(&dmv->dev_cv, "dm_dev"); 247 248 if (flags & DM_READONLY_FLAG) 249 dmv->flags |= DM_READONLY_FLAG; 250 251 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 252 253 disk_init(dmv->diskp, device_xname(devt), &dmdkdriver); 254 disk_attach(dmv->diskp); 255 256 dmv->diskp->dk_info = NULL; 257 258 if ((r = dm_dev_insert(dmv)) != 0) 259 dm_dev_free(dmv); 260 261 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); 262 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 263 264 /* Increment device counter After creating device */ 265 atomic_inc_32(&dm_dev_counter); 266 267 return r; 268 } 269 270 /* 271 * Get list of created device-mapper devices from global list and 272 * send it to kernel. 273 * 274 * Output dictionary: 275 * 276 * <key>cmd_data</key> 277 * <array> 278 * <dict> 279 * <key>name<key> 280 * <string>...</string> 281 * 282 * <key>dev</key> 283 * <integer>...</integer> 284 * </dict> 285 * </array> 286 */ 287 int 288 dm_dev_list_ioctl(prop_dictionary_t dm_dict) 289 { 290 prop_array_t dev_list; 291 uint32_t flags; 292 293 flags = 0; 294 295 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 296 297 dm_dbg_print_flags(flags); 298 299 dev_list = dm_dev_prop_list(); 300 301 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, dev_list); 302 prop_object_release(dev_list); 303 304 return 0; 305 } 306 307 /* 308 * Rename selected devices old name is in struct dm_ioctl. 309 * newname is taken from dictionary 310 * 311 * <key>cmd_data</key> 312 * <array> 313 * <string>...</string> 314 * </array> 315 */ 316 int 317 dm_dev_rename_ioctl(prop_dictionary_t dm_dict) 318 { 319 prop_array_t cmd_array; 320 dm_dev_t *dmv; 321 322 const char *name, *uuid, *n_name; 323 uint32_t flags, minor; 324 325 name = NULL; 326 uuid = NULL; 327 minor = 0; 328 329 /* Get needed values from dictionary. */ 330 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 331 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 332 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 333 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 334 335 dm_dbg_print_flags(flags); 336 337 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA); 338 339 prop_array_get_string(cmd_array, 0, &n_name); 340 341 if (strlen(n_name) + 1 > DM_NAME_LEN) 342 return EINVAL; 343 344 if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL) { 345 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 346 return ENOENT; 347 } 348 /* change device name */ 349 /* 350 * XXX How to deal with this change, name only used in 351 * dm_dev_routines, should I add dm_dev_change_name which will run 352 * under the dm_dev_list mutex ? 353 */ 354 strlcpy(dmv->name, n_name, DM_NAME_LEN); 355 356 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 357 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 358 prop_dictionary_set_string(dm_dict, DM_IOCTL_UUID, dmv->uuid); 359 360 dm_dev_insert(dmv); 361 362 return 0; 363 } 364 365 /* 366 * Remove device from global list I have to remove active 367 * and inactive tables first. 368 */ 369 int 370 dm_dev_remove_ioctl(prop_dictionary_t dm_dict) 371 { 372 int error; 373 cfdata_t cf; 374 dm_dev_t *dmv; 375 const char *name, *uuid; 376 uint32_t flags, minor; 377 device_t devt; 378 379 flags = 0; 380 name = NULL; 381 uuid = NULL; 382 383 /* Get needed values from dictionary. */ 384 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 385 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 386 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 387 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 388 389 dm_dbg_print_flags(flags); 390 391 /* 392 * This seems as hack to me, probably use routine dm_dev_get_devt to 393 * atomically get devt from device. 394 */ 395 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 396 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 397 return ENOENT; 398 } 399 devt = dmv->devt; 400 401 dm_dev_unbusy(dmv); 402 403 /* 404 * This will call dm_detach routine which will actually removes 405 * device. 406 */ 407 cf = device_cfdata(devt); 408 error = config_detach(devt, DETACH_QUIET); 409 if (error == 0) 410 kmem_free(cf, sizeof(*cf)); 411 return error; 412 } 413 414 /* 415 * Return actual state of device to libdevmapper. 416 */ 417 int 418 dm_dev_status_ioctl(prop_dictionary_t dm_dict) 419 { 420 dm_dev_t *dmv; 421 const char *name, *uuid; 422 uint32_t flags, j, minor; 423 424 name = NULL; 425 uuid = NULL; 426 flags = 0; 427 428 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 429 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 430 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 431 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 432 433 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 434 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 435 return ENOENT; 436 } 437 dm_dbg_print_flags(dmv->flags); 438 439 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 440 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 441 prop_dictionary_set_string(dm_dict, DM_IOCTL_UUID, dmv->uuid); 442 443 if (dmv->flags & DM_SUSPEND_FLAG) 444 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG); 445 446 /* 447 * Add status flags for tables I have to check both active and 448 * inactive tables. 449 */ 450 if ((j = dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))) 451 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 452 else 453 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 454 455 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_TARGET_COUNT, j); 456 457 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE)) 458 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 459 else 460 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 461 462 dm_dev_unbusy(dmv); 463 464 return 0; 465 } 466 467 /* 468 * Set only flag to suggest that device is suspended. This call is 469 * not supported in NetBSD. 470 */ 471 int 472 dm_dev_suspend_ioctl(prop_dictionary_t dm_dict) 473 { 474 dm_dev_t *dmv; 475 const char *name, *uuid; 476 uint32_t flags, minor; 477 478 name = NULL; 479 uuid = NULL; 480 flags = 0; 481 482 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 483 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 484 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 485 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 486 487 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 488 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 489 return ENOENT; 490 } 491 atomic_or_32(&dmv->flags, DM_SUSPEND_FLAG); 492 493 dm_dbg_print_flags(dmv->flags); 494 495 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 496 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags); 497 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 498 499 dm_dev_unbusy(dmv); 500 501 /* Add flags to dictionary flag after dmv -> dict copy */ 502 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); 503 504 return 0; 505 } 506 507 /* 508 * Simulate Linux behaviour better and switch tables here and not in 509 * dm_table_load_ioctl. 510 */ 511 int 512 dm_dev_resume_ioctl(prop_dictionary_t dm_dict) 513 { 514 dm_dev_t *dmv; 515 const char *name, *uuid; 516 uint32_t flags, minor; 517 518 name = NULL; 519 uuid = NULL; 520 flags = 0; 521 522 /* 523 * char *xml; xml = prop_dictionary_externalize(dm_dict); 524 * printf("%s\n",xml); 525 */ 526 527 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 528 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 529 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 530 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 531 532 /* Remove device from global device list */ 533 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 534 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 535 return ENOENT; 536 } 537 538 /* Make inactive table active, if it exists */ 539 if (dmv->flags & DM_INACTIVE_PRESENT_FLAG) 540 dm_table_switch_tables(&dmv->table_head); 541 542 atomic_and_32(&dmv->flags, ~(DM_SUSPEND_FLAG | DM_INACTIVE_PRESENT_FLAG)); 543 atomic_or_32(&dmv->flags, DM_ACTIVE_PRESENT_FLAG); 544 545 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); 546 547 dmgetproperties(dmv->diskp, &dmv->table_head); 548 549 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 550 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags); 551 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 552 553 dm_dev_unbusy(dmv); 554 555 /* Destroy inactive table after resume. */ 556 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 557 558 return 0; 559 } 560 561 /* 562 * Table management routines 563 * lvm2tools doesn't send name/uuid to kernel with table 564 * for lookup I have to use minor number. 565 */ 566 567 /* 568 * Remove inactive table from device. Routines which work's with inactive tables 569 * doesn't need to synchronise with dmstrategy. They can synchronise themselves with mutex?. 570 */ 571 int 572 dm_table_clear_ioctl(prop_dictionary_t dm_dict) 573 { 574 dm_dev_t *dmv; 575 const char *name, *uuid; 576 uint32_t flags, minor; 577 578 name = NULL; 579 uuid = NULL; 580 flags = 0; 581 minor = 0; 582 583 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 584 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 585 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 586 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 587 588 aprint_debug("Clearing inactive table from device: %s--%s\n", 589 name, uuid); 590 591 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 592 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 593 return ENOENT; 594 } 595 /* Select unused table */ 596 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 597 598 atomic_and_32(&dmv->flags, ~DM_INACTIVE_PRESENT_FLAG); 599 600 dm_dev_unbusy(dmv); 601 602 return 0; 603 } 604 605 /* 606 * Get list of physical devices for active table. 607 * Get dev_t from pdev vnode and insert it into cmd_array. 608 * 609 * XXX. This function is called from lvm2tools to get information 610 * about physical devices, too e.g. during vgcreate. 611 */ 612 int 613 dm_table_deps_ioctl(prop_dictionary_t dm_dict) 614 { 615 dm_dev_t *dmv; 616 dm_table_t *tbl; 617 dm_table_entry_t *table_en; 618 619 prop_array_t cmd_array; 620 const char *name, *uuid; 621 uint32_t flags, minor; 622 int table_type; 623 624 name = NULL; 625 uuid = NULL; 626 flags = 0; 627 628 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 629 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 630 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 631 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 632 633 /* create array for dev_t's */ 634 cmd_array = prop_array_create(); 635 636 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 637 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 638 return ENOENT; 639 } 640 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 641 prop_dictionary_set_string(dm_dict, DM_IOCTL_NAME, dmv->name); 642 prop_dictionary_set_string(dm_dict, DM_IOCTL_UUID, dmv->uuid); 643 644 aprint_debug("Getting table deps for device: %s\n", dmv->name); 645 646 /* 647 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query 648 * INACTIVE TABLE 649 */ 650 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG) 651 table_type = DM_TABLE_INACTIVE; 652 else 653 table_type = DM_TABLE_ACTIVE; 654 655 tbl = dm_table_get_entry(&dmv->table_head, table_type); 656 657 SLIST_FOREACH(table_en, tbl, next) 658 dm_table_deps(table_en, cmd_array); 659 660 dm_table_release(&dmv->table_head, table_type); 661 dm_dev_unbusy(dmv); 662 663 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); 664 prop_object_release(cmd_array); 665 666 return 0; 667 } 668 669 static int 670 dm_table_deps(dm_table_entry_t *table_en, prop_array_t array) 671 { 672 dm_mapping_t *map; 673 int i, size; 674 uint64_t rdev, tmp; 675 676 size = prop_array_count(array); 677 678 TAILQ_FOREACH(map, &table_en->pdev_maps, next) { 679 rdev = map->data.pdev->pdev_vnode->v_rdev; 680 for (i = 0; i < size; i++) { 681 if (prop_array_get_uint64(array, i, &tmp) == true) 682 if (rdev == tmp) 683 break; /* exists */ 684 } 685 /* 686 * Ignore if the device has already been added by 687 * other tables. 688 */ 689 if (i == size) { 690 prop_array_add_uint64(array, rdev); 691 aprint_debug("%s: %d:%d\n", __func__, major(rdev), 692 minor(rdev)); 693 } 694 } 695 696 return 0; 697 } 698 699 /* 700 * Load new table/tables to device. 701 * Call appropriate target init routine to open all physical pdev's and 702 * link them to device. For other targets mirror, strip, snapshot 703 * etc. also add dependency devices to upcalls list. 704 * 705 * Load table to inactive slot table are switched in dm_device_resume_ioctl. 706 * This simulates Linux behaviour better there should not be any difference. 707 */ 708 int 709 dm_table_load_ioctl(prop_dictionary_t dm_dict) 710 { 711 dm_dev_t *dmv; 712 dm_table_entry_t *table_en, *last_table; 713 dm_table_t *tbl; 714 dm_target_t *target; 715 716 prop_object_iterator_t iter; 717 prop_array_t cmd_array; 718 prop_dictionary_t target_dict; 719 720 const char *name, *uuid, *type; 721 uint32_t flags, minor; 722 723 flags = 0; 724 name = NULL; 725 uuid = NULL; 726 last_table = NULL; 727 728 /* 729 * char *xml; xml = prop_dictionary_externalize(dm_dict); 730 * printf("%s\n",xml); 731 */ 732 733 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 734 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 735 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 736 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 737 738 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA); 739 iter = prop_array_iterator(cmd_array); 740 dm_dbg_print_flags(flags); 741 742 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 743 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 744 prop_object_iterator_release(iter); 745 return ENOENT; 746 } 747 aprint_debug("Loading table to device: %s--%d\n", name, 748 dmv->table_head.cur_active_table); 749 750 /* 751 * I have to check if this table slot is not used by another table list. 752 * if it is used I should free them. 753 */ 754 if (dmv->flags & DM_INACTIVE_PRESENT_FLAG) 755 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 756 757 dm_dbg_print_flags(dmv->flags); 758 tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_INACTIVE); 759 760 aprint_debug("dmv->name = %s\n", dmv->name); 761 762 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 763 764 while ((target_dict = prop_object_iterator_next(iter)) != NULL) { 765 int ret; 766 const char *cp; 767 char *str; 768 size_t strsz; 769 770 prop_dictionary_get_string(target_dict, 771 DM_TABLE_TYPE, &type); 772 /* 773 * If we want to deny table with 2 or more different 774 * target we should do it here 775 */ 776 if (((target = dm_target_lookup(type)) == NULL) && 777 ((target = dm_target_autoload(type)) == NULL)) { 778 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); 779 dm_dev_unbusy(dmv); 780 prop_object_iterator_release(iter); 781 return ENOENT; 782 } 783 table_en = kmem_alloc(sizeof(dm_table_entry_t), KM_SLEEP); 784 prop_dictionary_get_uint64(target_dict, DM_TABLE_START, 785 &table_en->start); 786 prop_dictionary_get_uint64(target_dict, DM_TABLE_LENGTH, 787 &table_en->length); 788 789 table_en->target = target; 790 table_en->dm_dev = dmv; 791 table_en->target_config = NULL; 792 TAILQ_INIT(&table_en->pdev_maps); 793 794 /* 795 * There is a parameter string after dm_target_spec 796 * structure which points to /dev/wd0a 284 part of 797 * table. String str points to this text. This can be 798 * null and therefore it should be checked before we try to 799 * use it. 800 */ 801 cp = NULL; 802 prop_dictionary_get_string(target_dict, 803 DM_TABLE_PARAMS, &cp); 804 if (cp == NULL) 805 str = NULL; 806 else 807 str = kmem_strdupsize(cp, &strsz, KM_SLEEP); 808 809 if (SLIST_EMPTY(tbl) || last_table == NULL) 810 /* insert this table to head */ 811 SLIST_INSERT_HEAD(tbl, table_en, next); 812 else 813 SLIST_INSERT_AFTER(last_table, table_en, next); 814 815 if ((ret = dm_table_init(target, table_en, str)) != 0) { 816 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); 817 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 818 819 if (str != NULL) 820 kmem_free(str, strsz); 821 822 dm_dev_unbusy(dmv); 823 prop_object_iterator_release(iter); 824 return ret; 825 } 826 last_table = table_en; 827 if (str != NULL) 828 kmem_free(str, strsz); 829 } 830 prop_object_iterator_release(iter); 831 832 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 833 atomic_or_32(&dmv->flags, DM_INACTIVE_PRESENT_FLAG); 834 835 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); 836 dm_dev_unbusy(dmv); 837 return 0; 838 } 839 840 static int 841 dm_table_init(dm_target_t *target, dm_table_entry_t *table_en, char *params) 842 { 843 int i, n, ret, argc; 844 char **ap, **argv; 845 846 if (params == NULL) 847 return EINVAL; 848 849 n = target->max_argc; 850 if (n) 851 aprint_debug("Max argc %d for %s target\n", n, target->name); 852 else 853 n = 32; /* large enough for most targets */ 854 855 argv = kmem_alloc(sizeof(*argv) * n, KM_SLEEP); 856 857 for (ap = argv; 858 ap < &argv[n] && (*ap = strsep(¶ms, " \t")) != NULL;) { 859 if (**ap != '\0') 860 ap++; 861 } 862 argc = ap - argv; 863 864 for (i = 0; i < argc; i++) 865 aprint_debug("DM: argv[%d] = \"%s\"\n", i, argv[i]); 866 867 KASSERT(target->init); 868 ret = target->init(table_en, argc, argv); 869 870 kmem_free(argv, sizeof(*argv) * n); 871 872 return ret; 873 } 874 875 /* 876 * Get description of all tables loaded to device from kernel 877 * and send it to libdevmapper. 878 * 879 * Output dictionary for every table: 880 * 881 * <key>cmd_data</key> 882 * <array> 883 * <dict> 884 * <key>type<key> 885 * <string>...</string> 886 * 887 * <key>start</key> 888 * <integer>...</integer> 889 * 890 * <key>length</key> 891 * <integer>...</integer> 892 * 893 * <key>params</key> 894 * <string>...</string> 895 * </dict> 896 * </array> 897 */ 898 int 899 dm_table_status_ioctl(prop_dictionary_t dm_dict) 900 { 901 dm_dev_t *dmv; 902 dm_table_t *tbl; 903 dm_table_entry_t *table_en; 904 905 prop_array_t cmd_array; 906 prop_dictionary_t target_dict; 907 908 uint32_t minor, flags; 909 const char *name, *uuid; 910 int table_type; 911 912 uuid = NULL; 913 name = NULL; 914 flags = 0; 915 916 prop_dictionary_get_string(dm_dict, DM_IOCTL_NAME, &name); 917 prop_dictionary_get_string(dm_dict, DM_IOCTL_UUID, &uuid); 918 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 919 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 920 921 cmd_array = prop_array_create(); 922 923 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 924 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 925 return ENOENT; 926 } 927 /* 928 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query 929 * INACTIVE TABLE 930 */ 931 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG) 932 table_type = DM_TABLE_INACTIVE; 933 else 934 table_type = DM_TABLE_ACTIVE; 935 936 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE)) { 937 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 938 } else { 939 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 940 941 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE)) 942 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 943 else 944 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 945 } 946 947 if (dmv->flags & DM_SUSPEND_FLAG) 948 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG); 949 950 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 951 952 aprint_debug("Status of device tables: %s--%d\n", 953 name, dmv->table_head.cur_active_table); 954 955 tbl = dm_table_get_entry(&dmv->table_head, table_type); 956 957 SLIST_FOREACH(table_en, tbl, next) { 958 char *params; 959 int is_table; 960 961 target_dict = prop_dictionary_create(); 962 aprint_debug("%016" PRIu64 ", length %016" PRIu64 963 ", target %s\n", table_en->start, table_en->length, 964 table_en->target->name); 965 966 prop_dictionary_set_uint64(target_dict, DM_TABLE_START, 967 table_en->start); 968 prop_dictionary_set_uint64(target_dict, DM_TABLE_LENGTH, 969 table_en->length); 970 971 prop_dictionary_set_string(target_dict, DM_TABLE_TYPE, 972 table_en->target->name); 973 974 /* dm_table_get_cur_actv.table ?? */ 975 prop_dictionary_set_int32(target_dict, DM_TABLE_STAT, 976 dmv->table_head.cur_active_table); 977 978 /* 979 * Explicitly clear DM_TABLE_PARAMS to prevent dmsetup(8) from 980 * printing junk when DM_TABLE_PARAMS was never initialized. 981 */ 982 prop_dictionary_set_string(target_dict, DM_TABLE_PARAMS, ""); 983 984 is_table = (flags & DM_STATUS_TABLE_FLAG) ? 1 : 0; 985 if (is_table && table_en->target->table) 986 params = table_en->target->table( 987 table_en->target_config); 988 else if (!is_table && table_en->target->info) 989 params = table_en->target->info( 990 table_en->target_config); 991 else 992 params = NULL; 993 994 if (params != NULL) { 995 prop_dictionary_set_string(target_dict, 996 DM_TABLE_PARAMS, params); 997 kmem_free(params, DM_MAX_PARAMS_SIZE); 998 } 999 1000 prop_array_add(cmd_array, target_dict); 1001 prop_object_release(target_dict); 1002 } 1003 1004 dm_table_release(&dmv->table_head, table_type); 1005 dm_dev_unbusy(dmv); 1006 1007 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags); 1008 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); 1009 prop_object_release(cmd_array); 1010 1011 return 0; 1012 } 1013 1014 /* 1015 * For every call I have to set kernel driver version. 1016 * Because I can have commands supported only in other 1017 * newer/later version. This routine is called for every 1018 * ioctl command. 1019 */ 1020 int 1021 dm_check_version(prop_dictionary_t dm_dict) 1022 { 1023 int i; 1024 uint32_t dm_version[3]; 1025 prop_array_t ver; 1026 1027 ver = prop_dictionary_get(dm_dict, DM_IOCTL_VERSION); 1028 1029 for (i = 0; i < 3; i++) 1030 prop_array_get_uint32(ver, i, &dm_version[i]); 1031 1032 if (DM_VERSION_MAJOR != dm_version[0] || DM_VERSION_MINOR < dm_version[1]) { 1033 aprint_debug("libdevmapper/kernel version mismatch " 1034 "kernel: %d.%d.%d libdevmapper: %d.%d.%d\n", 1035 DM_VERSION_MAJOR, DM_VERSION_MINOR, DM_VERSION_PATCHLEVEL, 1036 dm_version[0], dm_version[1], dm_version[2]); 1037 1038 return EIO; 1039 } 1040 prop_array_set_uint32(ver, 0, DM_VERSION_MAJOR); 1041 prop_array_set_uint32(ver, 1, DM_VERSION_MINOR); 1042 prop_array_set_uint32(ver, 2, DM_VERSION_PATCHLEVEL); 1043 1044 prop_dictionary_set(dm_dict, DM_IOCTL_VERSION, ver); 1045 1046 return 0; 1047 } 1048