| 1 | /* $NetBSD: dm_ioctl.c,v 1.30 2015/05/10 14:08:54 christos 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 | |
| 32 | /* |
| 33 | * Locking is used to synchronise between ioctl calls and between dm_table's |
| 34 | * users. |
| 35 | * |
| 36 | * ioctl locking: |
| 37 | * Simple reference counting, to count users of device will be used routines |
| 38 | * dm_dev_busy/dm_dev_unbusy are used for that. |
| 39 | * dm_dev_lookup/dm_dev_rem call dm_dev_busy before return(caller is therefore |
| 40 | * holder of reference_counter last). |
| 41 | * |
| 42 | * ioctl routines which change/remove dm_dev parameters must wait on |
| 43 | * dm_dev::dev_cv and when last user will call dm_dev_unbusy they will wake |
| 44 | * up them. |
| 45 | * |
| 46 | * table_head locking: |
| 47 | * To access table entries dm_table_* routines must be used. |
| 48 | * |
| 49 | * dm_table_get_entry will increment table users reference |
| 50 | * counter. It will return active or inactive table depends |
| 51 | * on uint8_t argument. |
| 52 | * |
| 53 | * dm_table_release must be called for every table_entry from |
| 54 | * dm_table_get_entry. Between these to calls tables can'tbe switched |
| 55 | * or destroyed. |
| 56 | * |
| 57 | * dm_table_head_init initialize talbe_entries SLISTS and io_cv. |
| 58 | * |
| 59 | * dm_table_head_destroy destroy cv. |
| 60 | * |
| 61 | * There are two types of users for dm_table_head first type will |
| 62 | * only read list and try to do anything with it e.g. dmstrategy, |
| 63 | * dm_table_size etc. There is another user for table_head which wants |
| 64 | * to change table lists e.g. dm_dev_resume_ioctl, dm_dev_remove_ioctl, |
| 65 | * dm_table_clear_ioctl. |
| 66 | * |
| 67 | * NOTE: It is not allowed to call dm_table_destroy, dm_table_switch_tables |
| 68 | * with hold table reference counter. Table reference counter is hold |
| 69 | * after calling dm_table_get_entry routine. After calling this |
| 70 | * function user must call dm_table_release before any writer table |
| 71 | * operation. |
| 72 | * |
| 73 | * Example: dm_table_get_entry |
| 74 | * dm_table_destroy/dm_table_switch_tables |
| 75 | * This exaple will lead to deadlock situation because after dm_table_get_entry |
| 76 | * table reference counter is != 0 and dm_table_destroy have to wait on cv until |
| 77 | * reference counter is 0. |
| 78 | * |
| 79 | */ |
| 80 | |
| 81 | #include <sys/types.h> |
| 82 | #include <sys/param.h> |
| 83 | |
| 84 | #include <sys/device.h> |
| 85 | #include <sys/disk.h> |
| 86 | #include <sys/disklabel.h> |
| 87 | #include <sys/kmem.h> |
| 88 | #include <sys/malloc.h> |
| 89 | #include <sys/vnode.h> |
| 90 | |
| 91 | #include <machine/int_fmtio.h> |
| 92 | |
| 93 | #include "netbsd-dm.h" |
| 94 | #include "dm.h" |
| 95 | |
| 96 | static uint32_t sc_minor_num; |
| 97 | extern const struct dkdriver dmdkdriver; |
| 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 | |
| 121 | /* |
| 122 | * Print flags sent to the kernel from libevmapper. |
| 123 | */ |
| 124 | static int |
| 125 | dm_dbg_print_flags(int flags) |
| 126 | { |
| 127 | aprint_debug("dbg_print --- %d\n" , flags); |
| 128 | |
| 129 | if (flags & DM_READONLY_FLAG) |
| 130 | aprint_debug("dbg_flags: DM_READONLY_FLAG set In/Out\n" ); |
| 131 | |
| 132 | if (flags & DM_SUSPEND_FLAG) |
| 133 | aprint_debug("dbg_flags: DM_SUSPEND_FLAG set In/Out \n" ); |
| 134 | |
| 135 | if (flags & DM_PERSISTENT_DEV_FLAG) |
| 136 | aprint_debug("db_flags: DM_PERSISTENT_DEV_FLAG set In\n" ); |
| 137 | |
| 138 | if (flags & DM_STATUS_TABLE_FLAG) |
| 139 | aprint_debug("dbg_flags: DM_STATUS_TABLE_FLAG set In\n" ); |
| 140 | |
| 141 | if (flags & DM_ACTIVE_PRESENT_FLAG) |
| 142 | aprint_debug("dbg_flags: DM_ACTIVE_PRESENT_FLAG set Out\n" ); |
| 143 | |
| 144 | if (flags & DM_INACTIVE_PRESENT_FLAG) |
| 145 | aprint_debug("dbg_flags: DM_INACTIVE_PRESENT_FLAG set Out\n" ); |
| 146 | |
| 147 | if (flags & DM_BUFFER_FULL_FLAG) |
| 148 | aprint_debug("dbg_flags: DM_BUFFER_FULL_FLAG set Out\n" ); |
| 149 | |
| 150 | if (flags & DM_SKIP_BDGET_FLAG) |
| 151 | aprint_debug("dbg_flags: DM_SKIP_BDGET_FLAG set In\n" ); |
| 152 | |
| 153 | if (flags & DM_SKIP_LOCKFS_FLAG) |
| 154 | aprint_debug("dbg_flags: DM_SKIP_LOCKFS_FLAG set In\n" ); |
| 155 | |
| 156 | if (flags & DM_NOFLUSH_FLAG) |
| 157 | aprint_debug("dbg_flags: DM_NOFLUSH_FLAG set In\n" ); |
| 158 | |
| 159 | return 0; |
| 160 | } |
| 161 | /* |
| 162 | * Get version ioctl call I do it as default therefore this |
| 163 | * function is unused now. |
| 164 | */ |
| 165 | int |
| 166 | dm_get_version_ioctl(prop_dictionary_t dm_dict) |
| 167 | { |
| 168 | |
| 169 | return 0; |
| 170 | } |
| 171 | /* |
| 172 | * Get list of all available targets from global |
| 173 | * target list and sent them back to libdevmapper. |
| 174 | */ |
| 175 | int |
| 176 | dm_list_versions_ioctl(prop_dictionary_t dm_dict) |
| 177 | { |
| 178 | prop_array_t target_list; |
| 179 | uint32_t flags; |
| 180 | |
| 181 | flags = 0; |
| 182 | |
| 183 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 184 | |
| 185 | dm_dbg_print_flags(flags); |
| 186 | target_list = dm_target_prop_list(); |
| 187 | |
| 188 | prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, target_list); |
| 189 | prop_object_release(target_list); |
| 190 | |
| 191 | return 0; |
| 192 | } |
| 193 | /* |
| 194 | * Create in-kernel entry for device. Device attributes such as name, uuid are |
| 195 | * taken from proplib dictionary. |
| 196 | * |
| 197 | */ |
| 198 | int |
| 199 | dm_dev_create_ioctl(prop_dictionary_t dm_dict) |
| 200 | { |
| 201 | dm_dev_t *dmv; |
| 202 | const char *name, *uuid; |
| 203 | int r; |
| 204 | uint32_t flags; |
| 205 | device_t devt; |
| 206 | |
| 207 | r = 0; |
| 208 | flags = 0; |
| 209 | name = NULL; |
| 210 | uuid = NULL; |
| 211 | |
| 212 | /* Get needed values from dictionary. */ |
| 213 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 214 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 215 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 216 | |
| 217 | dm_dbg_print_flags(flags); |
| 218 | |
| 219 | /* Lookup name and uuid if device already exist quit. */ |
| 220 | if ((dmv = dm_dev_lookup(name, uuid, -1)) != NULL) { |
| 221 | DM_ADD_FLAG(flags, DM_EXISTS_FLAG); /* Device already exists */ |
| 222 | dm_dev_unbusy(dmv); |
| 223 | return EEXIST; |
| 224 | } |
| 225 | if ((devt = config_attach_pseudo(&dm_cfdata)) == NULL) { |
| 226 | aprint_error("Unable to attach pseudo device dm/%s\n" , name); |
| 227 | return (ENOMEM); |
| 228 | } |
| 229 | if ((dmv = dm_dev_alloc()) == NULL) |
| 230 | return ENOMEM; |
| 231 | |
| 232 | if (uuid) |
| 233 | strncpy(dmv->uuid, uuid, DM_UUID_LEN); |
| 234 | else |
| 235 | dmv->uuid[0] = '\0'; |
| 236 | |
| 237 | if (name) |
| 238 | strlcpy(dmv->name, name, DM_NAME_LEN); |
| 239 | |
| 240 | dmv->minor = (uint64_t)atomic_inc_32_nv(&sc_minor_num); |
| 241 | dmv->flags = 0; /* device flags are set when needed */ |
| 242 | dmv->ref_cnt = 0; |
| 243 | dmv->event_nr = 0; |
| 244 | dmv->dev_type = 0; |
| 245 | dmv->devt = devt; |
| 246 | |
| 247 | dm_table_head_init(&dmv->table_head); |
| 248 | |
| 249 | mutex_init(&dmv->dev_mtx, MUTEX_DEFAULT, IPL_NONE); |
| 250 | mutex_init(&dmv->diskp_mtx, MUTEX_DEFAULT, IPL_NONE); |
| 251 | cv_init(&dmv->dev_cv, "dm_dev" ); |
| 252 | |
| 253 | if (flags & DM_READONLY_FLAG) |
| 254 | dmv->flags |= DM_READONLY_FLAG; |
| 255 | |
| 256 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 257 | |
| 258 | disk_init(dmv->diskp, dmv->name, &dmdkdriver); |
| 259 | disk_attach(dmv->diskp); |
| 260 | |
| 261 | dmv->diskp->dk_info = NULL; |
| 262 | |
| 263 | if ((r = dm_dev_insert(dmv)) != 0) |
| 264 | dm_dev_free(dmv); |
| 265 | |
| 266 | DM_ADD_FLAG(flags, DM_EXISTS_FLAG); |
| 267 | DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); |
| 268 | |
| 269 | /* Increment device counter After creating device */ |
| 270 | atomic_inc_32(&dm_dev_counter); |
| 271 | |
| 272 | return r; |
| 273 | } |
| 274 | /* |
| 275 | * Get list of created device-mapper devices fromglobal list and |
| 276 | * send it to kernel. |
| 277 | * |
| 278 | * Output dictionary: |
| 279 | * |
| 280 | * <key>cmd_data</key> |
| 281 | * <array> |
| 282 | * <dict> |
| 283 | * <key>name<key> |
| 284 | * <string>...</string> |
| 285 | * |
| 286 | * <key>dev</key> |
| 287 | * <integer>...</integer> |
| 288 | * </dict> |
| 289 | * </array> |
| 290 | * |
| 291 | */ |
| 292 | int |
| 293 | dm_dev_list_ioctl(prop_dictionary_t dm_dict) |
| 294 | { |
| 295 | prop_array_t dev_list; |
| 296 | |
| 297 | uint32_t flags; |
| 298 | |
| 299 | flags = 0; |
| 300 | |
| 301 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 302 | |
| 303 | dm_dbg_print_flags(flags); |
| 304 | |
| 305 | dev_list = dm_dev_prop_list(); |
| 306 | |
| 307 | prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, dev_list); |
| 308 | prop_object_release(dev_list); |
| 309 | |
| 310 | return 0; |
| 311 | } |
| 312 | /* |
| 313 | * Rename selected devices old name is in struct dm_ioctl. |
| 314 | * newname is taken from dictionary |
| 315 | * |
| 316 | * <key>cmd_data</key> |
| 317 | * <array> |
| 318 | * <string>...</string> |
| 319 | * </array> |
| 320 | */ |
| 321 | int |
| 322 | dm_dev_rename_ioctl(prop_dictionary_t dm_dict) |
| 323 | { |
| 324 | prop_array_t cmd_array; |
| 325 | dm_dev_t *dmv; |
| 326 | |
| 327 | const char *name, *uuid, *n_name; |
| 328 | uint32_t flags, minor; |
| 329 | |
| 330 | name = NULL; |
| 331 | uuid = NULL; |
| 332 | minor = 0; |
| 333 | |
| 334 | /* Get needed values from dictionary. */ |
| 335 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 336 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 337 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 338 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 339 | |
| 340 | dm_dbg_print_flags(flags); |
| 341 | |
| 342 | cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA); |
| 343 | |
| 344 | prop_array_get_cstring_nocopy(cmd_array, 0, &n_name); |
| 345 | |
| 346 | if (strlen(n_name) + 1 > DM_NAME_LEN) |
| 347 | return EINVAL; |
| 348 | |
| 349 | if ((dmv = dm_dev_rem(name, uuid, minor)) == NULL) { |
| 350 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 351 | return ENOENT; |
| 352 | } |
| 353 | /* change device name */ |
| 354 | /* |
| 355 | * XXX How to deal with this change, name only used in |
| 356 | * dm_dev_routines, should I add dm_dev_change_name which will run |
| 357 | * under the dm_dev_list mutex ? |
| 358 | */ |
| 359 | strlcpy(dmv->name, n_name, DM_NAME_LEN); |
| 360 | |
| 361 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); |
| 362 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 363 | prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid); |
| 364 | |
| 365 | dm_dev_insert(dmv); |
| 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | /* |
| 370 | * Remove device from global list I have to remove active |
| 371 | * and inactive tables first. |
| 372 | */ |
| 373 | int |
| 374 | dm_dev_remove_ioctl(prop_dictionary_t dm_dict) |
| 375 | { |
| 376 | dm_dev_t *dmv; |
| 377 | const char *name, *uuid; |
| 378 | uint32_t flags, minor; |
| 379 | device_t devt; |
| 380 | |
| 381 | flags = 0; |
| 382 | name = NULL; |
| 383 | uuid = NULL; |
| 384 | |
| 385 | /* Get needed values from dictionary. */ |
| 386 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 387 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 388 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 389 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 390 | |
| 391 | dm_dbg_print_flags(flags); |
| 392 | |
| 393 | /* |
| 394 | * This seems as hack to me, probably use routine dm_dev_get_devt to |
| 395 | * atomicaly get devt from device. |
| 396 | */ |
| 397 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 398 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 399 | return ENOENT; |
| 400 | } |
| 401 | devt = dmv->devt; |
| 402 | |
| 403 | dm_dev_unbusy(dmv); |
| 404 | |
| 405 | /* |
| 406 | * This will call dm_detach routine which will actually removes |
| 407 | * device. |
| 408 | */ |
| 409 | return config_detach(devt, DETACH_QUIET); |
| 410 | } |
| 411 | /* |
| 412 | * Return actual state of device to libdevmapper. |
| 413 | */ |
| 414 | int |
| 415 | dm_dev_status_ioctl(prop_dictionary_t dm_dict) |
| 416 | { |
| 417 | dm_dev_t *dmv; |
| 418 | const char *name, *uuid; |
| 419 | uint32_t flags, j, minor; |
| 420 | |
| 421 | name = NULL; |
| 422 | uuid = NULL; |
| 423 | flags = 0; |
| 424 | j = 0; |
| 425 | |
| 426 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 427 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 428 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 429 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 430 | |
| 431 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 432 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 433 | return ENOENT; |
| 434 | } |
| 435 | dm_dbg_print_flags(dmv->flags); |
| 436 | |
| 437 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); |
| 438 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 439 | prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid); |
| 440 | |
| 441 | if (dmv->flags & DM_SUSPEND_FLAG) |
| 442 | DM_ADD_FLAG(flags, DM_SUSPEND_FLAG); |
| 443 | |
| 444 | /* |
| 445 | * Add status flags for tables I have to check both active and |
| 446 | * inactive tables. |
| 447 | */ |
| 448 | if ((j = dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE))) { |
| 449 | DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); |
| 450 | } else |
| 451 | DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); |
| 452 | |
| 453 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_TARGET_COUNT, j); |
| 454 | |
| 455 | if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE)) |
| 456 | DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); |
| 457 | else |
| 458 | DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); |
| 459 | |
| 460 | dm_dev_unbusy(dmv); |
| 461 | |
| 462 | return 0; |
| 463 | } |
| 464 | /* |
| 465 | * Set only flag to suggest that device is suspended. This call is |
| 466 | * not supported in NetBSD. |
| 467 | * |
| 468 | */ |
| 469 | int |
| 470 | dm_dev_suspend_ioctl(prop_dictionary_t dm_dict) |
| 471 | { |
| 472 | dm_dev_t *dmv; |
| 473 | const char *name, *uuid; |
| 474 | uint32_t flags, minor; |
| 475 | |
| 476 | name = NULL; |
| 477 | uuid = NULL; |
| 478 | flags = 0; |
| 479 | |
| 480 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 481 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 482 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 483 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 484 | |
| 485 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 486 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 487 | return ENOENT; |
| 488 | } |
| 489 | atomic_or_32(&dmv->flags, DM_SUSPEND_FLAG); |
| 490 | |
| 491 | dm_dbg_print_flags(dmv->flags); |
| 492 | |
| 493 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_OPEN, dmv->table_head.io_cnt); |
| 494 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, dmv->flags); |
| 495 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 496 | |
| 497 | dm_dev_unbusy(dmv); |
| 498 | |
| 499 | /* Add flags to dictionary flag after dmv -> dict copy */ |
| 500 | DM_ADD_FLAG(flags, DM_EXISTS_FLAG); |
| 501 | |
| 502 | return 0; |
| 503 | } |
| 504 | /* |
| 505 | * Simulate Linux behaviour better and switch tables here and not in |
| 506 | * dm_table_load_ioctl. |
| 507 | */ |
| 508 | int |
| 509 | dm_dev_resume_ioctl(prop_dictionary_t dm_dict) |
| 510 | { |
| 511 | dm_dev_t *dmv; |
| 512 | const char *name, *uuid; |
| 513 | uint32_t flags, minor; |
| 514 | |
| 515 | name = NULL; |
| 516 | uuid = NULL; |
| 517 | flags = 0; |
| 518 | |
| 519 | /* |
| 520 | * char *xml; xml = prop_dictionary_externalize(dm_dict); |
| 521 | * printf("%s\n",xml); |
| 522 | */ |
| 523 | |
| 524 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 525 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 526 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 527 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 528 | |
| 529 | /* Remove device from global device list */ |
| 530 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 531 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 532 | return ENOENT; |
| 533 | } |
| 534 | atomic_and_32(&dmv->flags, ~(DM_SUSPEND_FLAG | DM_INACTIVE_PRESENT_FLAG)); |
| 535 | atomic_or_32(&dmv->flags, DM_ACTIVE_PRESENT_FLAG); |
| 536 | |
| 537 | dm_table_switch_tables(&dmv->table_head); |
| 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 | * Table management routines |
| 556 | * lvm2tools doens't send name/uuid to kernel with table |
| 557 | * for lookup I have to use minor number. |
| 558 | */ |
| 559 | |
| 560 | /* |
| 561 | * Remove inactive table from device. Routines which work's with inactive tables |
| 562 | * doesn't need to synchronise with dmstrategy. They can synchronise themselves with mutex?. |
| 563 | * |
| 564 | */ |
| 565 | int |
| 566 | dm_table_clear_ioctl(prop_dictionary_t dm_dict) |
| 567 | { |
| 568 | dm_dev_t *dmv; |
| 569 | const char *name, *uuid; |
| 570 | uint32_t flags, minor; |
| 571 | |
| 572 | dmv = NULL; |
| 573 | name = NULL; |
| 574 | uuid = NULL; |
| 575 | flags = 0; |
| 576 | minor = 0; |
| 577 | |
| 578 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 579 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 580 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 581 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 582 | |
| 583 | aprint_debug("Clearing inactive table from device: %s--%s\n" , |
| 584 | name, uuid); |
| 585 | |
| 586 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 587 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 588 | return ENOENT; |
| 589 | } |
| 590 | /* Select unused table */ |
| 591 | dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); |
| 592 | |
| 593 | atomic_and_32(&dmv->flags, ~DM_INACTIVE_PRESENT_FLAG); |
| 594 | |
| 595 | dm_dev_unbusy(dmv); |
| 596 | |
| 597 | return 0; |
| 598 | } |
| 599 | /* |
| 600 | * Get list of physical devices for active table. |
| 601 | * Get dev_t from pdev vnode and insert it into cmd_array. |
| 602 | * |
| 603 | * XXX. This function is called from lvm2tools to get information |
| 604 | * about physical devices, too e.g. during vgcreate. |
| 605 | */ |
| 606 | int |
| 607 | dm_table_deps_ioctl(prop_dictionary_t dm_dict) |
| 608 | { |
| 609 | dm_dev_t *dmv; |
| 610 | dm_table_t *tbl; |
| 611 | dm_table_entry_t *table_en; |
| 612 | |
| 613 | prop_array_t cmd_array; |
| 614 | const char *name, *uuid; |
| 615 | uint32_t flags, minor; |
| 616 | |
| 617 | int table_type; |
| 618 | |
| 619 | name = NULL; |
| 620 | uuid = NULL; |
| 621 | dmv = NULL; |
| 622 | flags = 0; |
| 623 | |
| 624 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 625 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 626 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 627 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 628 | |
| 629 | /* create array for dev_t's */ |
| 630 | cmd_array = prop_array_create(); |
| 631 | |
| 632 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 633 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 634 | return ENOENT; |
| 635 | } |
| 636 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 637 | prop_dictionary_set_cstring(dm_dict, DM_IOCTL_NAME, dmv->name); |
| 638 | prop_dictionary_set_cstring(dm_dict, DM_IOCTL_UUID, dmv->uuid); |
| 639 | |
| 640 | aprint_debug("Getting table deps for device: %s\n" , dmv->name); |
| 641 | |
| 642 | /* |
| 643 | * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query |
| 644 | * INACTIVE TABLE |
| 645 | */ |
| 646 | if (flags & DM_QUERY_INACTIVE_TABLE_FLAG) |
| 647 | table_type = DM_TABLE_INACTIVE; |
| 648 | else |
| 649 | table_type = DM_TABLE_ACTIVE; |
| 650 | |
| 651 | tbl = dm_table_get_entry(&dmv->table_head, table_type); |
| 652 | |
| 653 | SLIST_FOREACH(table_en, tbl, next) |
| 654 | table_en->target->deps(table_en, cmd_array); |
| 655 | |
| 656 | dm_table_release(&dmv->table_head, table_type); |
| 657 | dm_dev_unbusy(dmv); |
| 658 | |
| 659 | prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); |
| 660 | prop_object_release(cmd_array); |
| 661 | |
| 662 | return 0; |
| 663 | } |
| 664 | /* |
| 665 | * Load new table/tables to device. |
| 666 | * Call apropriate target init routine open all physical pdev's and |
| 667 | * link them to device. For other targets mirror, strip, snapshot |
| 668 | * etc. also add dependency devices to upcalls list. |
| 669 | * |
| 670 | * Load table to inactive slot table are switched in dm_device_resume_ioctl. |
| 671 | * This simulates Linux behaviour better there should not be any difference. |
| 672 | * |
| 673 | */ |
| 674 | int |
| 675 | dm_table_load_ioctl(prop_dictionary_t dm_dict) |
| 676 | { |
| 677 | dm_dev_t *dmv; |
| 678 | dm_table_entry_t *table_en, *last_table; |
| 679 | dm_table_t *tbl; |
| 680 | dm_target_t *target; |
| 681 | |
| 682 | prop_object_iterator_t iter; |
| 683 | prop_array_t cmd_array; |
| 684 | prop_dictionary_t target_dict; |
| 685 | |
| 686 | const char *name, *uuid, *type; |
| 687 | |
| 688 | uint32_t flags, ret, minor; |
| 689 | |
| 690 | char *str; |
| 691 | |
| 692 | ret = 0; |
| 693 | flags = 0; |
| 694 | name = NULL; |
| 695 | uuid = NULL; |
| 696 | dmv = NULL; |
| 697 | last_table = NULL; |
| 698 | str = NULL; |
| 699 | |
| 700 | /* |
| 701 | * char *xml; xml = prop_dictionary_externalize(dm_dict); |
| 702 | * printf("%s\n",xml); |
| 703 | */ |
| 704 | |
| 705 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 706 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 707 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 708 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 709 | |
| 710 | cmd_array = prop_dictionary_get(dm_dict, DM_IOCTL_CMD_DATA); |
| 711 | iter = prop_array_iterator(cmd_array); |
| 712 | dm_dbg_print_flags(flags); |
| 713 | |
| 714 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 715 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 716 | prop_object_iterator_release(iter); |
| 717 | return ENOENT; |
| 718 | } |
| 719 | aprint_debug("Loading table to device: %s--%d\n" , name, |
| 720 | dmv->table_head.cur_active_table); |
| 721 | |
| 722 | /* |
| 723 | * I have to check if this table slot is not used by another table list. |
| 724 | * if it is used I should free them. |
| 725 | */ |
| 726 | if (dmv->flags & DM_INACTIVE_PRESENT_FLAG) |
| 727 | dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); |
| 728 | |
| 729 | dm_dbg_print_flags(dmv->flags); |
| 730 | tbl = dm_table_get_entry(&dmv->table_head, DM_TABLE_INACTIVE); |
| 731 | |
| 732 | aprint_debug("dmv->name = %s\n" , dmv->name); |
| 733 | |
| 734 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 735 | |
| 736 | while ((target_dict = prop_object_iterator_next(iter)) != NULL) { |
| 737 | |
| 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 | if ((table_en = kmem_alloc(sizeof(dm_table_entry_t), |
| 752 | KM_SLEEP)) == NULL) { |
| 753 | dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); |
| 754 | dm_dev_unbusy(dmv); |
| 755 | prop_object_iterator_release(iter); |
| 756 | return ENOMEM; |
| 757 | } |
| 758 | prop_dictionary_get_uint64(target_dict, DM_TABLE_START, |
| 759 | &table_en->start); |
| 760 | prop_dictionary_get_uint64(target_dict, DM_TABLE_LENGTH, |
| 761 | &table_en->length); |
| 762 | |
| 763 | table_en->target = target; |
| 764 | table_en->dm_dev = dmv; |
| 765 | table_en->target_config = NULL; |
| 766 | |
| 767 | /* |
| 768 | * There is a parameter string after dm_target_spec |
| 769 | * structure which points to /dev/wd0a 284 part of |
| 770 | * table. String str points to this text. This can be |
| 771 | * null and therefore it should be checked before we try to |
| 772 | * use it. |
| 773 | */ |
| 774 | prop_dictionary_get_cstring(target_dict, |
| 775 | DM_TABLE_PARAMS, (char **) &str); |
| 776 | |
| 777 | if (SLIST_EMPTY(tbl) || last_table == NULL) |
| 778 | /* insert this table to head */ |
| 779 | SLIST_INSERT_HEAD(tbl, table_en, next); |
| 780 | else |
| 781 | SLIST_INSERT_AFTER(last_table, table_en, next); |
| 782 | |
| 783 | /* |
| 784 | * Params string is different for every target, |
| 785 | * therfore I have to pass it to target init |
| 786 | * routine and parse parameters there. |
| 787 | */ |
| 788 | |
| 789 | if ((ret = target->init(dmv, &table_en->target_config, |
| 790 | str)) != 0) { |
| 791 | |
| 792 | dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); |
| 793 | dm_table_destroy(&dmv->table_head, DM_TABLE_INACTIVE); |
| 794 | free(str, M_TEMP); |
| 795 | |
| 796 | dm_dev_unbusy(dmv); |
| 797 | dm_target_unbusy(target); |
| 798 | prop_object_iterator_release(iter); |
| 799 | return ret; |
| 800 | } |
| 801 | last_table = table_en; |
| 802 | free(str, M_TEMP); |
| 803 | } |
| 804 | prop_object_iterator_release(iter); |
| 805 | |
| 806 | DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); |
| 807 | atomic_or_32(&dmv->flags, DM_INACTIVE_PRESENT_FLAG); |
| 808 | |
| 809 | dm_table_release(&dmv->table_head, DM_TABLE_INACTIVE); |
| 810 | dm_dev_unbusy(dmv); |
| 811 | return 0; |
| 812 | } |
| 813 | /* |
| 814 | * Get description of all tables loaded to device from kernel |
| 815 | * and send it to libdevmapper. |
| 816 | * |
| 817 | * Output dictionary for every table: |
| 818 | * |
| 819 | * <key>cmd_data</key> |
| 820 | * <array> |
| 821 | * <dict> |
| 822 | * <key>type<key> |
| 823 | * <string>...</string> |
| 824 | * |
| 825 | * <key>start</key> |
| 826 | * <integer>...</integer> |
| 827 | * |
| 828 | * <key>length</key> |
| 829 | * <integer>...</integer> |
| 830 | * |
| 831 | * <key>params</key> |
| 832 | * <string>...</string> |
| 833 | * </dict> |
| 834 | * </array> |
| 835 | * |
| 836 | */ |
| 837 | int |
| 838 | dm_table_status_ioctl(prop_dictionary_t dm_dict) |
| 839 | { |
| 840 | dm_dev_t *dmv; |
| 841 | dm_table_t *tbl; |
| 842 | dm_table_entry_t *table_en; |
| 843 | |
| 844 | prop_array_t cmd_array; |
| 845 | prop_dictionary_t target_dict; |
| 846 | |
| 847 | uint32_t minor, flags; |
| 848 | |
| 849 | const char *name, *uuid; |
| 850 | char *params; |
| 851 | int table_type; |
| 852 | |
| 853 | dmv = NULL; |
| 854 | uuid = NULL; |
| 855 | name = NULL; |
| 856 | params = NULL; |
| 857 | flags = 0; |
| 858 | |
| 859 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_NAME, &name); |
| 860 | prop_dictionary_get_cstring_nocopy(dm_dict, DM_IOCTL_UUID, &uuid); |
| 861 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_FLAGS, &flags); |
| 862 | prop_dictionary_get_uint32(dm_dict, DM_IOCTL_MINOR, &minor); |
| 863 | |
| 864 | cmd_array = prop_array_create(); |
| 865 | |
| 866 | if ((dmv = dm_dev_lookup(name, uuid, minor)) == NULL) { |
| 867 | DM_REMOVE_FLAG(flags, DM_EXISTS_FLAG); |
| 868 | return ENOENT; |
| 869 | } |
| 870 | /* |
| 871 | * if DM_QUERY_INACTIVE_TABLE_FLAG is passed we need to query |
| 872 | * INACTIVE TABLE |
| 873 | */ |
| 874 | if (flags & DM_QUERY_INACTIVE_TABLE_FLAG) |
| 875 | table_type = DM_TABLE_INACTIVE; |
| 876 | else |
| 877 | table_type = DM_TABLE_ACTIVE; |
| 878 | |
| 879 | if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_ACTIVE)) |
| 880 | DM_ADD_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); |
| 881 | else { |
| 882 | DM_REMOVE_FLAG(flags, DM_ACTIVE_PRESENT_FLAG); |
| 883 | |
| 884 | if (dm_table_get_target_count(&dmv->table_head, DM_TABLE_INACTIVE)) |
| 885 | DM_ADD_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); |
| 886 | else { |
| 887 | DM_REMOVE_FLAG(flags, DM_INACTIVE_PRESENT_FLAG); |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | if (dmv->flags & DM_SUSPEND_FLAG) |
| 892 | DM_ADD_FLAG(flags, DM_SUSPEND_FLAG); |
| 893 | |
| 894 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_MINOR, dmv->minor); |
| 895 | |
| 896 | aprint_debug("Status of device tables: %s--%d\n" , |
| 897 | name, dmv->table_head.cur_active_table); |
| 898 | |
| 899 | tbl = dm_table_get_entry(&dmv->table_head, table_type); |
| 900 | |
| 901 | SLIST_FOREACH(table_en, tbl, next) { |
| 902 | target_dict = prop_dictionary_create(); |
| 903 | aprint_debug("%016" PRIu64 ", length %016" PRIu64 |
| 904 | ", target %s\n" , table_en->start, table_en->length, |
| 905 | table_en->target->name); |
| 906 | |
| 907 | prop_dictionary_set_uint64(target_dict, DM_TABLE_START, |
| 908 | table_en->start); |
| 909 | prop_dictionary_set_uint64(target_dict, DM_TABLE_LENGTH, |
| 910 | table_en->length); |
| 911 | |
| 912 | prop_dictionary_set_cstring(target_dict, DM_TABLE_TYPE, |
| 913 | table_en->target->name); |
| 914 | |
| 915 | /* dm_table_get_cur_actv.table ?? */ |
| 916 | prop_dictionary_set_int32(target_dict, DM_TABLE_STAT, |
| 917 | dmv->table_head.cur_active_table); |
| 918 | |
| 919 | if (flags & DM_STATUS_TABLE_FLAG) { |
| 920 | params = table_en->target->status |
| 921 | (table_en->target_config); |
| 922 | |
| 923 | if (params != NULL) { |
| 924 | prop_dictionary_set_cstring(target_dict, |
| 925 | DM_TABLE_PARAMS, params); |
| 926 | |
| 927 | kmem_free(params, DM_MAX_PARAMS_SIZE); |
| 928 | } |
| 929 | } |
| 930 | prop_array_add(cmd_array, target_dict); |
| 931 | prop_object_release(target_dict); |
| 932 | } |
| 933 | |
| 934 | dm_table_release(&dmv->table_head, table_type); |
| 935 | dm_dev_unbusy(dmv); |
| 936 | |
| 937 | prop_dictionary_set_uint32(dm_dict, DM_IOCTL_FLAGS, flags); |
| 938 | prop_dictionary_set(dm_dict, DM_IOCTL_CMD_DATA, cmd_array); |
| 939 | prop_object_release(cmd_array); |
| 940 | |
| 941 | return 0; |
| 942 | } |
| 943 | |
| 944 | |
| 945 | /* |
| 946 | * For every call I have to set kernel driver version. |
| 947 | * Because I can have commands supported only in other |
| 948 | * newer/later version. This routine is called for every |
| 949 | * ioctl command. |
| 950 | */ |
| 951 | int |
| 952 | dm_check_version(prop_dictionary_t dm_dict) |
| 953 | { |
| 954 | size_t i; |
| 955 | uint32_t dm_version[3]; |
| 956 | prop_array_t ver; |
| 957 | |
| 958 | ver = prop_dictionary_get(dm_dict, DM_IOCTL_VERSION); |
| 959 | |
| 960 | for (i = 0; i < 3; i++) |
| 961 | prop_array_get_uint32(ver, i, &dm_version[i]); |
| 962 | |
| 963 | if (DM_VERSION_MAJOR != dm_version[0] || DM_VERSION_MINOR < dm_version[1]) { |
| 964 | aprint_debug("libdevmapper/kernel version mismatch " |
| 965 | "kernel: %d.%d.%d libdevmapper: %d.%d.%d\n" , |
| 966 | DM_VERSION_MAJOR, DM_VERSION_MINOR, DM_VERSION_PATCHLEVEL, |
| 967 | dm_version[0], dm_version[1], dm_version[2]); |
| 968 | |
| 969 | return EIO; |
| 970 | } |
| 971 | prop_array_set_uint32(ver, 0, DM_VERSION_MAJOR); |
| 972 | prop_array_set_uint32(ver, 1, DM_VERSION_MINOR); |
| 973 | prop_array_set_uint32(ver, 2, DM_VERSION_PATCHLEVEL); |
| 974 | |
| 975 | prop_dictionary_set(dm_dict, DM_IOCTL_VERSION, ver); |
| 976 | |
| 977 | return 0; |
| 978 | } |
| 979 | |