dm_ioctl.c revision 1.42
1 /* $NetBSD: dm_ioctl.c,v 1.42 2019/12/14 11:20:51 tkusumi 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 1.42 2019/12/14 11:20:51 tkusumi 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 to calls tables can'tbe switched 57 * or destroyed. 58 * 59 * dm_table_head_init initialize talbe_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 exaple 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 86 #include <sys/device.h> 87 #include <sys/disk.h> 88 #include <sys/disklabel.h> 89 #include <sys/kmem.h> 90 #include <sys/malloc.h> 91 92 #include <machine/int_fmtio.h> 93 94 #include "netbsd-dm.h" 95 #include "dm.h" 96 97 static uint32_t sc_minor_num; 98 uint32_t dm_dev_counter; 99 100 /* Generic cf_data for device-mapper driver */ 101 static struct cfdata dm_cfdata = { 102 .cf_name = "dm", 103 .cf_atname = "dm", 104 .cf_fstate = FSTATE_STAR, 105 .cf_unit = 0 106 }; 107 #define DM_REMOVE_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 #define DM_ADD_FLAG(flag, name) do { \ 114 prop_dictionary_get_uint32(dm_dict,DM_IOCTL_FLAGS,&flag); \ 115 flag |= name; \ 116 prop_dictionary_set_uint32(dm_dict,DM_IOCTL_FLAGS,flag); \ 117 } while (/*CONSTCOND*/0) 118 119 static int dm_dbg_print_flags(int); 120 static int dm_table_init(dm_target_t *, dm_table_entry_t *, char *); 121 122 /* 123 * Print flags sent to the kernel from libevmapper. 124 */ 125 static int 126 dm_dbg_print_flags(int flags) 127 { 128 aprint_debug("dbg_print --- %d\n", flags); 129 130 if (flags & DM_READONLY_FLAG) 131 aprint_debug("dbg_flags: DM_READONLY_FLAG set In/Out\n"); 132 133 if (flags & DM_SUSPEND_FLAG) 134 aprint_debug("dbg_flags: DM_SUSPEND_FLAG set In/Out\n"); 135 136 if (flags & DM_PERSISTENT_DEV_FLAG) 137 aprint_debug("dbg_flags: DM_PERSISTENT_DEV_FLAG set In\n"); 138 139 if (flags & DM_STATUS_TABLE_FLAG) 140 aprint_debug("dbg_flags: DM_STATUS_TABLE_FLAG set In\n"); 141 142 if (flags & DM_ACTIVE_PRESENT_FLAG) 143 aprint_debug("dbg_flags: DM_ACTIVE_PRESENT_FLAG set Out\n"); 144 145 if (flags & DM_INACTIVE_PRESENT_FLAG) 146 aprint_debug("dbg_flags: DM_INACTIVE_PRESENT_FLAG set Out\n"); 147 148 if (flags & DM_BUFFER_FULL_FLAG) 149 aprint_debug("dbg_flags: DM_BUFFER_FULL_FLAG set Out\n"); 150 151 if (flags & DM_SKIP_BDGET_FLAG) 152 aprint_debug("dbg_flags: DM_SKIP_BDGET_FLAG set In\n"); 153 154 if (flags & DM_SKIP_LOCKFS_FLAG) 155 aprint_debug("dbg_flags: DM_SKIP_LOCKFS_FLAG set In\n"); 156 157 if (flags & DM_NOFLUSH_FLAG) 158 aprint_debug("dbg_flags: DM_NOFLUSH_FLAG set In\n"); 159 160 return 0; 161 } 162 163 /* 164 * Get list of all available targets from global 165 * target list and sent them back to libdevmapper. 166 */ 167 int 168 dm_list_versions_ioctl(prop_dictionary_t dm_dict) 169 { 170 prop_array_t target_list; 171 uint32_t flags; 172 173 flags = 0; 174 175 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 176 177 dm_dbg_print_flags(flags); 178 target_list = dm_target_prop_list(); 179 180 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, target_list); 181 prop_object_release(target_list); 182 183 return 0; 184 } 185 186 /* 187 * Create in-kernel entry for device. Device attributes such as name, uuid are 188 * taken from proplib dictionary. 189 * 190 */ 191 int 192 dm_dev_create_ioctl(prop_dictionary_t dm_dict) 193 { 194 dm_dev_t *dmv; 195 const char *name, *uuid; 196 int r; 197 uint32_t flags; 198 device_t devt; 199 200 r = 0; 201 flags = 0; 202 name = NULL; 203 uuid = NULL; 204 205 /* Get needed values from dictionary. */ 206 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 207 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 208 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 209 210 dm_dbg_print_flags(flags); 211 212 /* Lookup name and uuid if device already exist quit. */ 213 if ((dmv = dm_dev_lookup(name, uuid, -1)) != NULL) { 214 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); /* Device already exists */ 215 dm_dev_unbusy(dmv); 216 return EEXIST; 217 } 218 if ((devt = config_attach_pseudo(&dm_cfdata)) == NULL) { 219 aprint_error("Unable to attach pseudo device dm/%s\n", name); 220 return (ENOMEM); 221 } 222 if ((dmv = dm_dev_alloc()) == NULL) 223 return ENOMEM; 224 225 if (uuid) 226 strncpy(dmv->uuid, uuid, DM_UUID_LEN); 227 else 228 dmv->uuid[0] = '\0'; 229 230 if (name) 231 strlcpy(dmv->name, name, DM_NAME_LEN); 232 233 dmv->minor = (uint64_t)atomic_inc_32_nv(&sc_minor_num); 234 dmv->flags = 0; /* device flags are set when needed */ 235 dmv->ref_cnt = 0; 236 dmv->event_nr = 0; 237 dmv->devt = devt; 238 239 dm_table_head_init(&dmv->table_head); 240 241 mutex_init(&dmv->dev_mtx, MUTEX_DEFAULT, IPL_NONE); 242 mutex_init(&dmv->diskp_mtx, MUTEX_DEFAULT, IPL_NONE); 243 cv_init(&dmv->dev_cv, "dm_dev"); 244 245 if (flags & DM_READONLY_FLAG) 246 dmv->flags |= DM_READONLY_FLAG; 247 248 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 249 250 disk_init(dmv->diskp, dmv->name, &dmdkdriver); 251 disk_attach(dmv->diskp); 252 253 dmv->diskp->dk_info = NULL; 254 255 if ((r = dm_dev_insert(dmv)) != 0) 256 dm_dev_free(dmv); 257 258 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); 259 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 260 261 /* Increment device counter After creating device */ 262 atomic_inc_32(&dm_dev_counter); 263 264 return r; 265 } 266 267 /* 268 * Get list of created device-mapper devices fromglobal list and 269 * send it to kernel. 270 * 271 * Output dictionary: 272 * 273 * <key>cmd_data</key> 274 * <array> 275 * <dict> 276 * <key>name<key> 277 * <string>...</string> 278 * 279 * <key>dev</key> 280 * <integer>...</integer> 281 * </dict> 282 * </array> 283 * 284 */ 285 int 286 dm_dev_list_ioctl(prop_dictionary_t dm_dict) 287 { 288 prop_array_t dev_list; 289 uint32_t flags; 290 291 flags = 0; 292 293 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 294 295 dm_dbg_print_flags(flags); 296 297 dev_list = dm_dev_prop_list(); 298 299 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, dev_list); 300 prop_object_release(dev_list); 301 302 return 0; 303 } 304 305 /* 306 * Rename selected devices old name is in struct dm_ioctl. 307 * newname is taken from dictionary 308 * 309 * <key>cmd_data</key> 310 * <array> 311 * <string>...</string> 312 * </array> 313 */ 314 int 315 dm_dev_rename_ioctl(prop_dictionary_t dm_dict) 316 { 317 prop_array_t cmd_array; 318 dm_dev_t *dmv; 319 320 const char *name, *uuid, *n_name; 321 uint32_t flags, minor; 322 323 name = NULL; 324 uuid = NULL; 325 minor = 0; 326 327 /* Get needed values from dictionary. */ 328 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 329 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 330 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 331 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 332 333 dm_dbg_print_flags(flags); 334 335 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA); 336 337 prop_array_get_cstring_nocopy(cmd_array, 0, &n_name); 338 339 if (strlen(n_name) + 1 > DM_NAME_LEN) 340 return EINVAL; 341 342 if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL) { 343 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 344 return ENOENT; 345 } 346 /* change device name */ 347 /* 348 * XXX How to deal with this change, name only used in 349 * dm_dev_routines, should I add dm_dev_change_name which will run 350 * under the dm_dev_list mutex ? 351 */ 352 strlcpy(dmv->name, n_name, DM_NAME_LEN); 353 354 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 355 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 356 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid); 357 358 dm_dev_insert(dmv); 359 360 return 0; 361 } 362 363 /* 364 * Remove device from global list I have to remove active 365 * and inactive tables first. 366 */ 367 int 368 dm_dev_remove_ioctl(prop_dictionary_t dm_dict) 369 { 370 dm_dev_t *dmv; 371 const char *name, *uuid; 372 uint32_t flags, minor; 373 device_t devt; 374 375 flags = 0; 376 name = NULL; 377 uuid = NULL; 378 379 /* Get needed values from dictionary. */ 380 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 381 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 382 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 383 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 384 385 dm_dbg_print_flags(flags); 386 387 /* 388 * This seems as hack to me, probably use routine dm_dev_get_devt to 389 * atomicaly get devt from device. 390 */ 391 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 392 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 393 return ENOENT; 394 } 395 devt = dmv->devt; 396 397 dm_dev_unbusy(dmv); 398 399 /* 400 * This will call dm_detach routine which will actually removes 401 * device. 402 */ 403 return config_detach(devt, DETACH_QUIET); 404 } 405 406 /* 407 * Return actual state of device to libdevmapper. 408 */ 409 int 410 dm_dev_status_ioctl(prop_dictionary_t dm_dict) 411 { 412 dm_dev_t *dmv; 413 const char *name, *uuid; 414 uint32_t flags, j, minor; 415 416 name = NULL; 417 uuid = NULL; 418 flags = 0; 419 j = 0; 420 421 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 422 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 423 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 424 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 425 426 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 427 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 428 return ENOENT; 429 } 430 dm_dbg_print_flags(dmv->flags); 431 432 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 433 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 434 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid); 435 436 if (dmv->flags & DM_SUSPEND_FLAG) 437 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG); 438 439 /* 440 * Add status flags for tables I have to check both active and 441 * inactive tables. 442 */ 443 if ((j = dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))) 444 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 445 else 446 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 447 448 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_TARGET_COUNT, j); 449 450 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE)) 451 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 452 else 453 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 454 455 dm_dev_unbusy(dmv); 456 457 return 0; 458 } 459 460 /* 461 * Set only flag to suggest that device is suspended. This call is 462 * not supported in NetBSD. 463 * 464 */ 465 int 466 dm_dev_suspend_ioctl(prop_dictionary_t dm_dict) 467 { 468 dm_dev_t *dmv; 469 const char *name, *uuid; 470 uint32_t flags, minor; 471 472 name = NULL; 473 uuid = NULL; 474 flags = 0; 475 476 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 477 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 478 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 479 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 480 481 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 482 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 483 return ENOENT; 484 } 485 atomic_or_32(&dmv->flags, DM_SUSPEND_FLAG); 486 487 dm_dbg_print_flags(dmv->flags); 488 489 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 490 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags); 491 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 492 493 dm_dev_unbusy(dmv); 494 495 /* Add flags to dictionary flag after dmv -> dict copy */ 496 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); 497 498 return 0; 499 } 500 501 /* 502 * Simulate Linux behaviour better and switch tables here and not in 503 * dm_table_load_ioctl. 504 */ 505 int 506 dm_dev_resume_ioctl(prop_dictionary_t dm_dict) 507 { 508 dm_dev_t *dmv; 509 const char *name, *uuid; 510 uint32_t flags, minor; 511 512 name = NULL; 513 uuid = NULL; 514 flags = 0; 515 516 /* 517 * char *xml; xml = prop_dictionary_externalize(dm_dict); 518 * printf("%s\n",xml); 519 */ 520 521 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 522 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 523 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 524 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 525 526 /* Remove device from global device list */ 527 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 528 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 529 return ENOENT; 530 } 531 532 /* Make inactive table active, if it exists */ 533 if (dmv->flags & DM_INACTIVE_PRESENT_FLAG) 534 dm_table_switch_tables(&dmv->table_head); 535 536 atomic_and_32(&dmv->flags, ~(DM_SUSPEND_FLAG | DM_INACTIVE_PRESENT_FLAG)); 537 atomic_or_32(&dmv->flags, DM_ACTIVE_PRESENT_FLAG); 538 539 DM_ADD_FLAG(flags, DM_EXISTS_FLAG); 540 541 dmgetproperties(dmv->diskp, &dmv->table_head); 542 543 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); 544 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags); 545 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 546 547 dm_dev_unbusy(dmv); 548 549 /* Destroy inactive table after resume. */ 550 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 551 552 return 0; 553 } 554 555 /* 556 * Table management routines 557 * lvm2tools doens't send name/uuid to kernel with table 558 * for lookup I have to use minor number. 559 */ 560 561 /* 562 * Remove inactive table from device. Routines which work's with inactive tables 563 * doesn't need to synchronise with dmstrategy. They can synchronise themselves with mutex?. 564 * 565 */ 566 int 567 dm_table_clear_ioctl(prop_dictionary_t dm_dict) 568 { 569 dm_dev_t *dmv; 570 const char *name, *uuid; 571 uint32_t flags, minor; 572 573 dmv = NULL; 574 name = NULL; 575 uuid = NULL; 576 flags = 0; 577 minor = 0; 578 579 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 580 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 581 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 582 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 583 584 aprint_debug("Clearing inactive table from device: %s--%s\n", 585 name, uuid); 586 587 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 588 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 589 return ENOENT; 590 } 591 /* Select unused table */ 592 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 593 594 atomic_and_32(&dmv->flags, ~DM_INACTIVE_PRESENT_FLAG); 595 596 dm_dev_unbusy(dmv); 597 598 return 0; 599 } 600 601 /* 602 * Get list of physical devices for active table. 603 * Get dev_t from pdev vnode and insert it into cmd_array. 604 * 605 * XXX. This function is called from lvm2tools to get information 606 * about physical devices, too e.g. during vgcreate. 607 */ 608 int 609 dm_table_deps_ioctl(prop_dictionary_t dm_dict) 610 { 611 dm_dev_t *dmv; 612 dm_table_t *tbl; 613 dm_table_entry_t *table_en; 614 615 prop_array_t cmd_array; 616 const char *name, *uuid; 617 uint32_t flags, minor; 618 619 int table_type; 620 621 name = NULL; 622 uuid = NULL; 623 dmv = NULL; 624 flags = 0; 625 626 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 627 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 628 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 629 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 630 631 /* create array for dev_t's */ 632 cmd_array = prop_array_create(); 633 634 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 635 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 636 return ENOENT; 637 } 638 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 639 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmv->name); 640 prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid); 641 642 aprint_debug("Getting table deps for device: %s\n", dmv->name); 643 644 /* 645 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query 646 * INACTIVE TABLE 647 */ 648 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG) 649 table_type = DM_TABLE_INACTIVE; 650 else 651 table_type = DM_TABLE_ACTIVE; 652 653 tbl = dm_table_get_entry(&dmv->table_head, table_type); 654 655 SLIST_FOREACH(table_en, tbl, next) 656 table_en->target->deps(table_en, cmd_array); 657 658 dm_table_release(&dmv->table_head, table_type); 659 dm_dev_unbusy(dmv); 660 661 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); 662 prop_object_release(cmd_array); 663 664 return 0; 665 } 666 667 /* 668 * Load new table/tables to device. 669 * Call apropriate target init routine open all physical pdev's and 670 * link them to device. For other targets mirror, strip, snapshot 671 * etc. also add dependency devices to upcalls list. 672 * 673 * Load table to inactive slot table are switched in dm_device_resume_ioctl. 674 * This simulates Linux behaviour better there should not be any difference. 675 * 676 */ 677 int 678 dm_table_load_ioctl(prop_dictionary_t dm_dict) 679 { 680 dm_dev_t *dmv; 681 dm_table_entry_t *table_en, *last_table; 682 dm_table_t *tbl; 683 dm_target_t *target; 684 685 prop_object_iterator_t iter; 686 prop_array_t cmd_array; 687 prop_dictionary_t target_dict; 688 689 const char *name, *uuid, *type; 690 uint32_t flags, ret, minor; 691 char *str; 692 693 ret = 0; 694 flags = 0; 695 name = NULL; 696 uuid = NULL; 697 dmv = NULL; 698 last_table = NULL; 699 str = NULL; 700 701 /* 702 * char *xml; xml = prop_dictionary_externalize(dm_dict); 703 * printf("%s\n",xml); 704 */ 705 706 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 707 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 708 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 709 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 710 711 cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA); 712 iter = prop_array_iterator(cmd_array); 713 dm_dbg_print_flags(flags); 714 715 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 716 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 717 prop_object_iterator_release(iter); 718 return ENOENT; 719 } 720 aprint_debug("Loading table to device: %s--%d\n", name, 721 dmv->table_head.cur_active_table); 722 723 /* 724 * I have to check if this table slot is not used by another table list. 725 * if it is used I should free them. 726 */ 727 if (dmv->flags & DM_INACTIVE_PRESENT_FLAG) 728 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 729 730 dm_dbg_print_flags(dmv->flags); 731 tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_INACTIVE); 732 733 aprint_debug("dmv->name = %s\n", dmv->name); 734 735 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 736 737 while ((target_dict = prop_object_iterator_next(iter)) != NULL) { 738 prop_dictionary_get_cstring_nocopy(target_dict, 739 DM_TABLE_TYPE, &type); 740 /* 741 * If we want to deny table with 2 or more different 742 * target we should do it here 743 */ 744 if (((target = dm_target_lookup(type)) == NULL) && 745 ((target = dm_target_autoload(type)) == NULL)) { 746 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); 747 dm_dev_unbusy(dmv); 748 prop_object_iterator_release(iter); 749 return ENOENT; 750 } 751 table_en = kmem_alloc(sizeof(dm_table_entry_t), KM_SLEEP); 752 prop_dictionary_get_uint64(target_dict, DM_TABLE_START, 753 &table_en->start); 754 prop_dictionary_get_uint64(target_dict, DM_TABLE_LENGTH, 755 &table_en->length); 756 757 table_en->target = target; 758 table_en->dm_dev = dmv; 759 table_en->target_config = NULL; 760 761 /* 762 * There is a parameter string after dm_target_spec 763 * structure which points to /dev/wd0a 284 part of 764 * table. String str points to this text. This can be 765 * null and therefore it should be checked before we try to 766 * use it. 767 */ 768 prop_dictionary_get_cstring(target_dict, 769 DM_TABLE_PARAMS, (char **) &str); 770 771 if (SLIST_EMPTY(tbl) || last_table == NULL) 772 /* insert this table to head */ 773 SLIST_INSERT_HEAD(tbl, table_en, next); 774 else 775 SLIST_INSERT_AFTER(last_table, table_en, next); 776 777 if ((ret = dm_table_init(target, table_en, str)) != 0) { 778 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); 779 dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); 780 free(str, M_TEMP); 781 782 dm_dev_unbusy(dmv); 783 prop_object_iterator_release(iter); 784 return ret; 785 } 786 last_table = table_en; 787 free(str, M_TEMP); 788 } 789 prop_object_iterator_release(iter); 790 791 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 792 atomic_or_32(&dmv->flags, DM_INACTIVE_PRESENT_FLAG); 793 794 dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); 795 dm_dev_unbusy(dmv); 796 return 0; 797 } 798 799 static int 800 dm_table_init(dm_target_t *target, dm_table_entry_t *table_en, char *params) 801 { 802 int i, n, ret, argc; 803 char **ap, **argv; 804 805 if (params == NULL) 806 return EINVAL; 807 808 n = target->max_argc; 809 if (n) 810 aprint_debug("Max argc %d for %s target\n", n, target->name); 811 else 812 n = 32; /* large enough for most targets */ 813 814 argv = kmem_alloc(sizeof(*argv) * n, KM_SLEEP); 815 816 for (ap = argv; 817 ap < &argv[n] && (*ap = strsep(¶ms, " \t")) != NULL;) { 818 if (**ap != '\0') 819 ap++; 820 } 821 argc = ap - argv; 822 823 for (i = 0; i < argc; i++) 824 aprint_debug("DM: argv[%d] = \"%s\"\n", i, argv[i]); 825 826 KASSERT(target->init); 827 ret = target->init(table_en, argc, argv); 828 829 kmem_free(argv, sizeof(*argv) * n); 830 831 return ret; 832 } 833 834 /* 835 * Get description of all tables loaded to device from kernel 836 * and send it to libdevmapper. 837 * 838 * Output dictionary for every table: 839 * 840 * <key>cmd_data</key> 841 * <array> 842 * <dict> 843 * <key>type<key> 844 * <string>...</string> 845 * 846 * <key>start</key> 847 * <integer>...</integer> 848 * 849 * <key>length</key> 850 * <integer>...</integer> 851 * 852 * <key>params</key> 853 * <string>...</string> 854 * </dict> 855 * </array> 856 * 857 */ 858 int 859 dm_table_status_ioctl(prop_dictionary_t dm_dict) 860 { 861 dm_dev_t *dmv; 862 dm_table_t *tbl; 863 dm_table_entry_t *table_en; 864 865 prop_array_t cmd_array; 866 prop_dictionary_t target_dict; 867 868 uint32_t minor, flags; 869 870 const char *name, *uuid; 871 char *params; 872 int table_type; 873 874 dmv = NULL; 875 uuid = NULL; 876 name = NULL; 877 params = NULL; 878 flags = 0; 879 880 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); 881 prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); 882 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); 883 prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); 884 885 cmd_array = prop_array_create(); 886 887 if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { 888 DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); 889 return ENOENT; 890 } 891 /* 892 * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query 893 * INACTIVE TABLE 894 */ 895 if (flags & DM_QUERY_INACTIVE_TABLE_FLAG) 896 table_type = DM_TABLE_INACTIVE; 897 else 898 table_type = DM_TABLE_ACTIVE; 899 900 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE)) { 901 DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 902 } else { 903 DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); 904 905 if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE)) 906 DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 907 else 908 DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); 909 } 910 911 if (dmv->flags & DM_SUSPEND_FLAG) 912 DM_ADD_FLAG(flags, DM_SUSPEND_FLAG); 913 914 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); 915 916 aprint_debug("Status of device tables: %s--%d\n", 917 name, dmv->table_head.cur_active_table); 918 919 tbl = dm_table_get_entry(&dmv->table_head, table_type); 920 921 SLIST_FOREACH(table_en, tbl, next) { 922 target_dict = prop_dictionary_create(); 923 aprint_debug("%016" PRIu64 ", length %016" PRIu64 924 ", target %s\n", table_en->start, table_en->length, 925 table_en->target->name); 926 927 prop_dictionary_set_uint64(target_dict, DM_TABLE_START, 928 table_en->start); 929 prop_dictionary_set_uint64(target_dict, DM_TABLE_LENGTH, 930 table_en->length); 931 932 prop_dictionary_set_cstring(target_dict, DM_TABLE_TYPE, 933 table_en->target->name); 934 935 /* dm_table_get_cur_actv.table ?? */ 936 prop_dictionary_set_int32(target_dict, DM_TABLE_STAT, 937 dmv->table_head.cur_active_table); 938 939 /* 940 * Explicitly clear DM_TABLE_PARAMS to prevent dmsetup(8) from 941 * printing junk when DM_TABLE_PARAMS was never initialized. 942 */ 943 prop_dictionary_set_cstring(target_dict, DM_TABLE_PARAMS, ""); 944 945 if (flags & DM_STATUS_TABLE_FLAG) { 946 params = table_en->target->status 947 (table_en->target_config); 948 949 if (params != NULL) { 950 prop_dictionary_set_cstring(target_dict, 951 DM_TABLE_PARAMS, params); 952 953 kmem_free(params, DM_MAX_PARAMS_SIZE); 954 } 955 } 956 prop_array_add(cmd_array, target_dict); 957 prop_object_release(target_dict); 958 } 959 960 dm_table_release(&dmv->table_head, table_type); 961 dm_dev_unbusy(dmv); 962 963 prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags); 964 prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); 965 prop_object_release(cmd_array); 966 967 return 0; 968 } 969 970 /* 971 * For every call I have to set kernel driver version. 972 * Because I can have commands supported only in other 973 * newer/later version. This routine is called for every 974 * ioctl command. 975 */ 976 int 977 dm_check_version(prop_dictionary_t dm_dict) 978 { 979 size_t i; 980 uint32_t dm_version[3]; 981 prop_array_t ver; 982 983 ver = prop_dictionary_get(dm_dict, DM_IOCTL_VERSION); 984 985 for (i = 0; i < 3; i++) 986 prop_array_get_uint32(ver, i, &dm_version[i]); 987 988 if (DM_VERSION_MAJOR != dm_version[0] || DM_VERSION_MINOR < dm_version[1]) { 989 aprint_debug("libdevmapper/kernel version mismatch " 990 "kernel: %d.%d.%d libdevmapper: %d.%d.%d\n", 991 DM_VERSION_MAJOR, DM_VERSION_MINOR, DM_VERSION_PATCHLEVEL, 992 dm_version[0], dm_version[1], dm_version[2]); 993 994 return EIO; 995 } 996 prop_array_set_uint32(ver, 0, DM_VERSION_MAJOR); 997 prop_array_set_uint32(ver, 1, DM_VERSION_MINOR); 998 prop_array_set_uint32(ver, 2, DM_VERSION_PATCHLEVEL); 999 1000 prop_dictionary_set(dm_dict, DM_IOCTL_VERSION, ver); 1001 1002 return 0; 1003 } 1004
Indexes created Tue Sep 30 20:09:53 GMT 2025