| 1 | /* |
| 2 | * Block driver for the VMDK format |
| 3 | * |
| 4 | * Copyright (c) 2004 Fabrice Bellard |
| 5 | * Copyright (c) 2005 Filip Navara |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
| 25 | |
| 26 | #include "qemu/osdep.h" |
| 27 | #include "qapi/error.h" |
| 28 | #include "block/block_int.h" |
| 29 | #include "system/block-backend.h" |
| 30 | #include "qobject/qdict.h" |
| 31 | #include "qemu/error-report.h" |
| 32 | #include "qemu/module.h" |
| 33 | #include "qemu/option.h" |
| 34 | #include "qemu/bswap.h" |
| 35 | #include "qemu/memalign.h" |
| 36 | #include "migration/blocker.h" |
| 37 | #include "qemu/cutils.h" |
| 38 | #include <zlib.h> |
| 39 | |
| 40 | #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') |
| 41 | #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') |
| 42 | #define VMDK4_COMPRESSION_DEFLATE 1 |
| 43 | #define VMDK4_FLAG_NL_DETECT (1 << 0) |
| 44 | #define VMDK4_FLAG_RGD (1 << 1) |
| 45 | /* Zeroed-grain enable bit */ |
| 46 | #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) |
| 47 | #define VMDK4_FLAG_COMPRESS (1 << 16) |
| 48 | #define VMDK4_FLAG_MARKER (1 << 17) |
| 49 | #define VMDK4_GD_AT_END 0xffffffffffffffffULL |
| 50 | |
| 51 | #define VMDK_EXTENT_MAX_SECTORS (1ULL << 32) |
| 52 | |
| 53 | #define VMDK_GTE_ZEROED 0x1 |
| 54 | |
| 55 | /* VMDK internal error codes */ |
| 56 | #define VMDK_OK 0 |
| 57 | #define VMDK_ERROR (-1) |
| 58 | /* Cluster not allocated */ |
| 59 | #define VMDK_UNALLOC (-2) |
| 60 | #define VMDK_ZEROED (-3) |
| 61 | |
| 62 | #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" |
| 63 | #define BLOCK_OPT_TOOLSVERSION "toolsversion" |
| 64 | |
| 65 | typedef struct { |
| 66 | uint32_t version; |
| 67 | uint32_t flags; |
| 68 | uint32_t disk_sectors; |
| 69 | uint32_t granularity; |
| 70 | uint32_t l1dir_offset; |
| 71 | uint32_t l1dir_size; |
| 72 | uint32_t file_sectors; |
| 73 | uint32_t cylinders; |
| 74 | uint32_t heads; |
| 75 | uint32_t sectors_per_track; |
| 76 | } QEMU_PACKED VMDK3Header; |
| 77 | |
| 78 | typedef struct { |
| 79 | uint32_t version; |
| 80 | uint32_t flags; |
| 81 | uint64_t capacity; |
| 82 | uint64_t granularity; |
| 83 | uint64_t desc_offset; |
| 84 | uint64_t desc_size; |
| 85 | /* Number of GrainTableEntries per GrainTable */ |
| 86 | uint32_t num_gtes_per_gt; |
| 87 | uint64_t rgd_offset; |
| 88 | uint64_t gd_offset; |
| 89 | uint64_t grain_offset; |
| 90 | char filler[1]; |
| 91 | char check_bytes[4]; |
| 92 | uint16_t compressAlgorithm; |
| 93 | } QEMU_PACKED VMDK4Header; |
| 94 | |
| 95 | typedef struct VMDKSESparseConstHeader { |
| 96 | uint64_t magic; |
| 97 | uint64_t version; |
| 98 | uint64_t capacity; |
| 99 | uint64_t grain_size; |
| 100 | uint64_t grain_table_size; |
| 101 | uint64_t flags; |
| 102 | uint64_t reserved1; |
| 103 | uint64_t reserved2; |
| 104 | uint64_t reserved3; |
| 105 | uint64_t reserved4; |
| 106 | uint64_t volatile_header_offset; |
| 107 | uint64_t volatile_header_size; |
| 108 | uint64_t journal_header_offset; |
| 109 | uint64_t journal_header_size; |
| 110 | uint64_t journal_offset; |
| 111 | uint64_t journal_size; |
| 112 | uint64_t grain_dir_offset; |
| 113 | uint64_t grain_dir_size; |
| 114 | uint64_t grain_tables_offset; |
| 115 | uint64_t grain_tables_size; |
| 116 | uint64_t free_bitmap_offset; |
| 117 | uint64_t free_bitmap_size; |
| 118 | uint64_t backmap_offset; |
| 119 | uint64_t backmap_size; |
| 120 | uint64_t grains_offset; |
| 121 | uint64_t grains_size; |
| 122 | uint8_t pad[304]; |
| 123 | } QEMU_PACKED VMDKSESparseConstHeader; |
| 124 | |
| 125 | typedef struct VMDKSESparseVolatileHeader { |
| 126 | uint64_t magic; |
| 127 | uint64_t free_gt_number; |
| 128 | uint64_t next_txn_seq_number; |
| 129 | uint64_t replay_journal; |
| 130 | uint8_t pad[480]; |
| 131 | } QEMU_PACKED VMDKSESparseVolatileHeader; |
| 132 | |
| 133 | #define L2_CACHE_SIZE 16 |
| 134 | |
| 135 | typedef struct VmdkExtent { |
| 136 | BdrvChild *file; |
| 137 | bool flat; |
| 138 | bool compressed; |
| 139 | bool has_marker; |
| 140 | bool has_zero_grain; |
| 141 | bool sesparse; |
| 142 | uint64_t sesparse_l2_tables_offset; |
| 143 | uint64_t sesparse_clusters_offset; |
| 144 | int32_t entry_size; |
| 145 | int version; |
| 146 | int64_t sectors; |
| 147 | int64_t end_sector; |
| 148 | int64_t flat_start_offset; |
| 149 | int64_t l1_table_offset; |
| 150 | int64_t l1_backup_table_offset; |
| 151 | void *l1_table; |
| 152 | uint32_t *l1_backup_table; |
| 153 | unsigned int l1_size; |
| 154 | uint32_t l1_entry_sectors; |
| 155 | |
| 156 | unsigned int l2_size; |
| 157 | void *l2_cache; |
| 158 | uint32_t l2_cache_offsets[L2_CACHE_SIZE]; |
| 159 | uint32_t l2_cache_counts[L2_CACHE_SIZE]; |
| 160 | |
| 161 | int64_t cluster_sectors; |
| 162 | int64_t next_cluster_sector; |
| 163 | char *type; |
| 164 | } VmdkExtent; |
| 165 | |
| 166 | typedef struct BDRVVmdkState { |
| 167 | CoMutex lock; |
| 168 | uint64_t desc_offset; |
| 169 | bool cid_updated; |
| 170 | bool cid_checked; |
| 171 | uint32_t cid; |
| 172 | uint32_t parent_cid; |
| 173 | int num_extents; |
| 174 | /* Extent array with num_extents entries, ascend ordered by address */ |
| 175 | VmdkExtent *extents; |
| 176 | Error *migration_blocker; |
| 177 | char *create_type; |
| 178 | } BDRVVmdkState; |
| 179 | |
| 180 | typedef struct BDRVVmdkReopenState { |
| 181 | bool *extents_using_bs_file; |
| 182 | } BDRVVmdkReopenState; |
| 183 | |
| 184 | typedef struct VmdkMetaData { |
| 185 | unsigned int l1_index; |
| 186 | unsigned int l2_index; |
| 187 | unsigned int l2_offset; |
| 188 | bool new_allocation; |
| 189 | uint32_t *l2_cache_entry; |
| 190 | } VmdkMetaData; |
| 191 | |
| 192 | typedef struct VmdkGrainMarker { |
| 193 | uint64_t lba; |
| 194 | uint32_t size; |
| 195 | uint8_t data[]; |
| 196 | } QEMU_PACKED VmdkGrainMarker; |
| 197 | |
| 198 | enum { |
| 199 | MARKER_END_OF_STREAM = 0, |
| 200 | MARKER_GRAIN_TABLE = 1, |
| 201 | MARKER_GRAIN_DIRECTORY = 2, |
| 202 | MARKER_FOOTER = 3, |
| 203 | }; |
| 204 | |
| 205 | static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) |
| 206 | { |
| 207 | uint32_t magic; |
| 208 | |
| 209 | if (buf_size < 4) { |
| 210 | return 0; |
| 211 | } |
| 212 | magic = be32_to_cpu(*(uint32_t *)buf); |
| 213 | if (magic == VMDK3_MAGIC || |
| 214 | magic == VMDK4_MAGIC) { |
| 215 | return 100; |
| 216 | } else { |
| 217 | const char *p = (const char *)buf; |
| 218 | const char *end = p + buf_size; |
| 219 | while (p < end) { |
| 220 | if (*p == '#') { |
| 221 | /* skip comment line */ |
| 222 | while (p < end && *p != '\n') { |
| 223 | p++; |
| 224 | } |
| 225 | p++; |
| 226 | continue; |
| 227 | } |
| 228 | if (*p == ' ') { |
| 229 | while (p < end && *p == ' ') { |
| 230 | p++; |
| 231 | } |
| 232 | /* skip '\r' if windows line endings used. */ |
| 233 | if (p < end && *p == '\r') { |
| 234 | p++; |
| 235 | } |
| 236 | /* only accept blank lines before 'version=' line */ |
| 237 | if (p == end || *p != '\n') { |
| 238 | return 0; |
| 239 | } |
| 240 | p++; |
| 241 | continue; |
| 242 | } |
| 243 | if (end - p >= strlen("version=X\n")) { |
| 244 | if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || |
| 245 | strncmp("version=2\n", p, strlen("version=2\n")) == 0 || |
| 246 | strncmp("version=3\n", p, strlen("version=3\n")) == 0) { |
| 247 | return 100; |
| 248 | } |
| 249 | } |
| 250 | if (end - p >= strlen("version=X\r\n")) { |
| 251 | if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || |
| 252 | strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0 || |
| 253 | strncmp("version=3\r\n", p, strlen("version=3\r\n")) == 0) { |
| 254 | return 100; |
| 255 | } |
| 256 | } |
| 257 | return 0; |
| 258 | } |
| 259 | return 0; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | #define SECTOR_SIZE 512 |
| 264 | #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ |
| 265 | #define BUF_SIZE 4096 |
| 266 | #define HEADER_SIZE 512 /* first sector of 512 bytes */ |
| 267 | |
| 268 | static void vmdk_free_extents(BlockDriverState *bs) |
| 269 | { |
| 270 | int i; |
| 271 | BDRVVmdkState *s = bs->opaque; |
| 272 | VmdkExtent *e; |
| 273 | |
| 274 | bdrv_graph_wrlock_drained(); |
| 275 | for (i = 0; i < s->num_extents; i++) { |
| 276 | e = &s->extents[i]; |
| 277 | g_free(e->l1_table); |
| 278 | g_free(e->l2_cache); |
| 279 | g_free(e->l1_backup_table); |
| 280 | g_free(e->type); |
| 281 | if (e->file != bs->file) { |
| 282 | bdrv_unref_child(bs, e->file); |
| 283 | } |
| 284 | } |
| 285 | bdrv_graph_wrunlock(); |
| 286 | |
| 287 | g_free(s->extents); |
| 288 | } |
| 289 | |
| 290 | static void vmdk_free_last_extent(BlockDriverState *bs) |
| 291 | { |
| 292 | BDRVVmdkState *s = bs->opaque; |
| 293 | |
| 294 | if (s->num_extents == 0) { |
| 295 | return; |
| 296 | } |
| 297 | s->num_extents--; |
| 298 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents); |
| 299 | } |
| 300 | |
| 301 | /* Return -ve errno, or 0 on success and write CID into *pcid. */ |
| 302 | static int GRAPH_RDLOCK |
| 303 | vmdk_read_cid(BlockDriverState *bs, int parent, uint32_t *pcid) |
| 304 | { |
| 305 | char *desc; |
| 306 | uint32_t cid; |
| 307 | const char *p_name, *cid_str; |
| 308 | size_t cid_str_size; |
| 309 | BDRVVmdkState *s = bs->opaque; |
| 310 | int ret; |
| 311 | |
| 312 | desc = g_malloc0(DESC_SIZE); |
| 313 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
| 314 | if (ret < 0) { |
| 315 | goto out; |
| 316 | } |
| 317 | |
| 318 | if (parent) { |
| 319 | cid_str = "parentCID"; |
| 320 | cid_str_size = sizeof("parentCID"); |
| 321 | } else { |
| 322 | cid_str = "CID"; |
| 323 | cid_str_size = sizeof("CID"); |
| 324 | } |
| 325 | |
| 326 | desc[DESC_SIZE - 1] = '\0'; |
| 327 | p_name = strstr(desc, cid_str); |
| 328 | if (p_name == NULL) { |
| 329 | ret = -EINVAL; |
| 330 | goto out; |
| 331 | } |
| 332 | p_name += cid_str_size; |
| 333 | if (sscanf(p_name, "%" SCNx32, &cid) != 1) { |
| 334 | ret = -EINVAL; |
| 335 | goto out; |
| 336 | } |
| 337 | *pcid = cid; |
| 338 | ret = 0; |
| 339 | |
| 340 | out: |
| 341 | g_free(desc); |
| 342 | return ret; |
| 343 | } |
| 344 | |
| 345 | static int coroutine_fn GRAPH_RDLOCK |
| 346 | vmdk_write_cid(BlockDriverState *bs, uint32_t cid) |
| 347 | { |
| 348 | char *desc, *tmp_desc; |
| 349 | char *p_name, *tmp_str; |
| 350 | BDRVVmdkState *s = bs->opaque; |
| 351 | int ret = 0; |
| 352 | |
| 353 | size_t desc_buf_size; |
| 354 | |
| 355 | if (s->desc_offset == 0) { |
| 356 | desc_buf_size = bdrv_getlength(bs->file->bs); |
| 357 | if (desc_buf_size > 16ULL << 20) { |
| 358 | error_report("VMDK description file too big"); |
| 359 | return -EFBIG; |
| 360 | } |
| 361 | } else { |
| 362 | desc_buf_size = DESC_SIZE; |
| 363 | } |
| 364 | |
| 365 | desc = g_malloc0(desc_buf_size); |
| 366 | tmp_desc = g_malloc0(desc_buf_size); |
| 367 | ret = bdrv_co_pread(bs->file, s->desc_offset, desc_buf_size, desc, 0); |
| 368 | if (ret < 0) { |
| 369 | goto out; |
| 370 | } |
| 371 | |
| 372 | desc[desc_buf_size - 1] = '\0'; |
| 373 | tmp_str = strstr(desc, "parentCID"); |
| 374 | if (tmp_str == NULL) { |
| 375 | ret = -EINVAL; |
| 376 | goto out; |
| 377 | } |
| 378 | |
| 379 | pstrcpy(tmp_desc, desc_buf_size, tmp_str); |
| 380 | p_name = strstr(desc, "CID"); |
| 381 | if (p_name != NULL) { |
| 382 | p_name += sizeof("CID"); |
| 383 | snprintf(p_name, desc_buf_size - (p_name - desc), "%" PRIx32 "\n", cid); |
| 384 | pstrcat(desc, desc_buf_size, tmp_desc); |
| 385 | } |
| 386 | |
| 387 | ret = bdrv_co_pwrite_sync(bs->file, s->desc_offset, desc_buf_size, desc, 0); |
| 388 | |
| 389 | out: |
| 390 | g_free(desc); |
| 391 | g_free(tmp_desc); |
| 392 | return ret; |
| 393 | } |
| 394 | |
| 395 | static int coroutine_fn GRAPH_RDLOCK vmdk_is_cid_valid(BlockDriverState *bs) |
| 396 | { |
| 397 | BDRVVmdkState *s = bs->opaque; |
| 398 | uint32_t cur_pcid; |
| 399 | |
| 400 | if (!s->cid_checked && bs->backing) { |
| 401 | BlockDriverState *p_bs = bs->backing->bs; |
| 402 | |
| 403 | if (strcmp(p_bs->drv->format_name, "vmdk")) { |
| 404 | /* Backing file is not in vmdk format, so it does not have |
| 405 | * a CID, which makes the overlay's parent CID invalid */ |
| 406 | return 0; |
| 407 | } |
| 408 | |
| 409 | if (vmdk_read_cid(p_bs, 0, &cur_pcid) != 0) { |
| 410 | /* read failure: report as not valid */ |
| 411 | return 0; |
| 412 | } |
| 413 | if (s->parent_cid != cur_pcid) { |
| 414 | /* CID not valid */ |
| 415 | return 0; |
| 416 | } |
| 417 | } |
| 418 | s->cid_checked = true; |
| 419 | /* CID valid */ |
| 420 | return 1; |
| 421 | } |
| 422 | |
| 423 | static int vmdk_reopen_prepare(BDRVReopenState *state, |
| 424 | BlockReopenQueue *queue, Error **errp) |
| 425 | { |
| 426 | BDRVVmdkState *s; |
| 427 | BDRVVmdkReopenState *rs; |
| 428 | int i; |
| 429 | |
| 430 | GLOBAL_STATE_CODE(); |
| 431 | GRAPH_RDLOCK_GUARD_MAINLOOP(); |
| 432 | |
| 433 | assert(state != NULL); |
| 434 | assert(state->bs != NULL); |
| 435 | assert(state->opaque == NULL); |
| 436 | |
| 437 | s = state->bs->opaque; |
| 438 | |
| 439 | rs = g_new0(BDRVVmdkReopenState, 1); |
| 440 | state->opaque = rs; |
| 441 | |
| 442 | /* |
| 443 | * Check whether there are any extents stored in bs->file; if bs->file |
| 444 | * changes, we will need to update their .file pointers to follow suit |
| 445 | */ |
| 446 | rs->extents_using_bs_file = g_new(bool, s->num_extents); |
| 447 | for (i = 0; i < s->num_extents; i++) { |
| 448 | rs->extents_using_bs_file[i] = s->extents[i].file == state->bs->file; |
| 449 | } |
| 450 | |
| 451 | return 0; |
| 452 | } |
| 453 | |
| 454 | static void vmdk_reopen_clean(BDRVReopenState *state) |
| 455 | { |
| 456 | BDRVVmdkReopenState *rs = state->opaque; |
| 457 | |
| 458 | g_free(rs->extents_using_bs_file); |
| 459 | g_free(rs); |
| 460 | state->opaque = NULL; |
| 461 | } |
| 462 | |
| 463 | static void vmdk_reopen_commit(BDRVReopenState *state) |
| 464 | { |
| 465 | BDRVVmdkState *s = state->bs->opaque; |
| 466 | BDRVVmdkReopenState *rs = state->opaque; |
| 467 | int i; |
| 468 | |
| 469 | GLOBAL_STATE_CODE(); |
| 470 | GRAPH_RDLOCK_GUARD_MAINLOOP(); |
| 471 | |
| 472 | for (i = 0; i < s->num_extents; i++) { |
| 473 | if (rs->extents_using_bs_file[i]) { |
| 474 | s->extents[i].file = state->bs->file; |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | vmdk_reopen_clean(state); |
| 479 | } |
| 480 | |
| 481 | static void vmdk_reopen_abort(BDRVReopenState *state) |
| 482 | { |
| 483 | vmdk_reopen_clean(state); |
| 484 | } |
| 485 | |
| 486 | static int GRAPH_RDLOCK vmdk_parent_open(BlockDriverState *bs) |
| 487 | { |
| 488 | char *p_name; |
| 489 | char *desc; |
| 490 | BDRVVmdkState *s = bs->opaque; |
| 491 | int ret; |
| 492 | |
| 493 | desc = g_malloc0(DESC_SIZE + 1); |
| 494 | ret = bdrv_pread(bs->file, s->desc_offset, DESC_SIZE, desc, 0); |
| 495 | if (ret < 0) { |
| 496 | goto out; |
| 497 | } |
| 498 | |
| 499 | p_name = strstr(desc, "parentFileNameHint"); |
| 500 | if (p_name != NULL) { |
| 501 | char *end_name; |
| 502 | |
| 503 | p_name += sizeof("parentFileNameHint") + 1; |
| 504 | end_name = strchr(p_name, '\"'); |
| 505 | if (end_name == NULL) { |
| 506 | ret = -EINVAL; |
| 507 | goto out; |
| 508 | } |
| 509 | if ((end_name - p_name) > sizeof(bs->auto_backing_file) - 1) { |
| 510 | ret = -EINVAL; |
| 511 | goto out; |
| 512 | } |
| 513 | |
| 514 | pstrcpy(bs->auto_backing_file, end_name - p_name + 1, p_name); |
| 515 | pstrcpy(bs->backing_file, sizeof(bs->backing_file), |
| 516 | bs->auto_backing_file); |
| 517 | pstrcpy(bs->backing_format, sizeof(bs->backing_format), |
| 518 | "vmdk"); |
| 519 | } |
| 520 | |
| 521 | out: |
| 522 | g_free(desc); |
| 523 | return ret; |
| 524 | } |
| 525 | |
| 526 | /* Create and append extent to the extent array. Return the added VmdkExtent |
| 527 | * address. return NULL if allocation failed. */ |
| 528 | static int vmdk_add_extent(BlockDriverState *bs, |
| 529 | BdrvChild *file, bool flat, int64_t sectors, |
| 530 | int64_t l1_offset, int64_t l1_backup_offset, |
| 531 | uint32_t l1_size, |
| 532 | int l2_size, uint64_t cluster_sectors, |
| 533 | VmdkExtent **new_extent, |
| 534 | Error **errp) |
| 535 | { |
| 536 | VmdkExtent *extent; |
| 537 | BDRVVmdkState *s = bs->opaque; |
| 538 | int64_t nb_sectors; |
| 539 | |
| 540 | if (cluster_sectors > 0x200000) { |
| 541 | /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ |
| 542 | error_setg(errp, "Invalid granularity, image may be corrupt"); |
| 543 | return -EFBIG; |
| 544 | } |
| 545 | if (l1_size > 32 * 1024 * 1024) { |
| 546 | /* |
| 547 | * Although with big capacity and small l1_entry_sectors, we can get a |
| 548 | * big l1_size, we don't want unbounded value to allocate the table. |
| 549 | * Limit it to 32M, which is enough to store: |
| 550 | * 8TB - for both VMDK3 & VMDK4 with |
| 551 | * minimal cluster size: 512B |
| 552 | * minimal L2 table size: 512 entries |
| 553 | * 8 TB is still more than the maximal value supported for |
| 554 | * VMDK3 & VMDK4 which is 2TB. |
| 555 | * 64TB - for "ESXi seSparse Extent" |
| 556 | * minimal cluster size: 512B (default is 4KB) |
| 557 | * L2 table size: 4096 entries (const). |
| 558 | * 64TB is more than the maximal value supported for |
| 559 | * seSparse VMDKs (which is slightly less than 64TB) |
| 560 | */ |
| 561 | error_setg(errp, "L1 size too big"); |
| 562 | return -EFBIG; |
| 563 | } |
| 564 | |
| 565 | nb_sectors = bdrv_nb_sectors(file->bs); |
| 566 | if (nb_sectors < 0) { |
| 567 | return nb_sectors; |
| 568 | } |
| 569 | |
| 570 | s->extents = g_renew(VmdkExtent, s->extents, s->num_extents + 1); |
| 571 | extent = &s->extents[s->num_extents]; |
| 572 | s->num_extents++; |
| 573 | |
| 574 | memset(extent, 0, sizeof(VmdkExtent)); |
| 575 | extent->file = file; |
| 576 | extent->flat = flat; |
| 577 | extent->sectors = sectors; |
| 578 | extent->l1_table_offset = l1_offset; |
| 579 | extent->l1_backup_table_offset = l1_backup_offset; |
| 580 | extent->l1_size = l1_size; |
| 581 | extent->l1_entry_sectors = l2_size * cluster_sectors; |
| 582 | extent->l2_size = l2_size; |
| 583 | extent->cluster_sectors = flat ? sectors : cluster_sectors; |
| 584 | extent->next_cluster_sector = ROUND_UP(nb_sectors, cluster_sectors); |
| 585 | extent->entry_size = sizeof(uint32_t); |
| 586 | |
| 587 | if (s->num_extents > 1) { |
| 588 | extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; |
| 589 | } else { |
| 590 | extent->end_sector = extent->sectors; |
| 591 | } |
| 592 | bs->total_sectors = extent->end_sector; |
| 593 | if (new_extent) { |
| 594 | *new_extent = extent; |
| 595 | } |
| 596 | return 0; |
| 597 | } |
| 598 | |
| 599 | static int GRAPH_RDLOCK |
| 600 | vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, Error **errp) |
| 601 | { |
| 602 | int ret; |
| 603 | size_t l1_size; |
| 604 | int i; |
| 605 | |
| 606 | /* read the L1 table */ |
| 607 | l1_size = extent->l1_size * extent->entry_size; |
| 608 | extent->l1_table = g_try_malloc(l1_size); |
| 609 | if (l1_size && extent->l1_table == NULL) { |
| 610 | return -ENOMEM; |
| 611 | } |
| 612 | |
| 613 | ret = bdrv_pread(extent->file, extent->l1_table_offset, l1_size, |
| 614 | extent->l1_table, 0); |
| 615 | if (ret < 0) { |
| 616 | bdrv_refresh_filename(extent->file->bs); |
| 617 | error_setg_errno(errp, -ret, |
| 618 | "Could not read l1 table from extent '%s'", |
| 619 | extent->file->bs->filename); |
| 620 | goto fail_l1; |
| 621 | } |
| 622 | for (i = 0; i < extent->l1_size; i++) { |
| 623 | if (extent->entry_size == sizeof(uint64_t)) { |
| 624 | le64_to_cpus((uint64_t *)extent->l1_table + i); |
| 625 | } else { |
| 626 | assert(extent->entry_size == sizeof(uint32_t)); |
| 627 | le32_to_cpus((uint32_t *)extent->l1_table + i); |
| 628 | } |
| 629 | } |
| 630 | |
| 631 | if (extent->l1_backup_table_offset) { |
| 632 | assert(!extent->sesparse); |
| 633 | extent->l1_backup_table = g_try_malloc(l1_size); |
| 634 | if (l1_size && extent->l1_backup_table == NULL) { |
| 635 | ret = -ENOMEM; |
| 636 | goto fail_l1; |
| 637 | } |
| 638 | ret = bdrv_pread(extent->file, extent->l1_backup_table_offset, |
| 639 | l1_size, extent->l1_backup_table, 0); |
| 640 | if (ret < 0) { |
| 641 | bdrv_refresh_filename(extent->file->bs); |
| 642 | error_setg_errno(errp, -ret, |
| 643 | "Could not read l1 backup table from extent '%s'", |
| 644 | extent->file->bs->filename); |
| 645 | goto fail_l1b; |
| 646 | } |
| 647 | for (i = 0; i < extent->l1_size; i++) { |
| 648 | le32_to_cpus(&extent->l1_backup_table[i]); |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | extent->l2_cache = |
| 653 | g_malloc(extent->entry_size * extent->l2_size * L2_CACHE_SIZE); |
| 654 | return 0; |
| 655 | fail_l1b: |
| 656 | g_free(extent->l1_backup_table); |
| 657 | fail_l1: |
| 658 | g_free(extent->l1_table); |
| 659 | return ret; |
| 660 | } |
| 661 | |
| 662 | static int GRAPH_RDLOCK |
| 663 | vmdk_open_vmfs_sparse(BlockDriverState *bs, BdrvChild *file, int flags, |
| 664 | Error **errp) |
| 665 | { |
| 666 | int ret; |
| 667 | uint32_t magic; |
| 668 | VMDK3Header header; |
| 669 | VmdkExtent *extent = NULL; |
| 670 | |
| 671 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
| 672 | if (ret < 0) { |
| 673 | bdrv_refresh_filename(file->bs); |
| 674 | error_setg_errno(errp, -ret, |
| 675 | "Could not read header from file '%s'", |
| 676 | file->bs->filename); |
| 677 | return ret; |
| 678 | } |
| 679 | ret = vmdk_add_extent(bs, file, false, |
| 680 | le32_to_cpu(header.disk_sectors), |
| 681 | (int64_t)le32_to_cpu(header.l1dir_offset) << 9, |
| 682 | 0, |
| 683 | le32_to_cpu(header.l1dir_size), |
| 684 | 4096, |
| 685 | le32_to_cpu(header.granularity), |
| 686 | &extent, |
| 687 | errp); |
| 688 | if (ret < 0) { |
| 689 | return ret; |
| 690 | } |
| 691 | ret = vmdk_init_tables(bs, extent, errp); |
| 692 | if (ret) { |
| 693 | /* free extent allocated by vmdk_add_extent */ |
| 694 | vmdk_free_last_extent(bs); |
| 695 | } |
| 696 | return ret; |
| 697 | } |
| 698 | |
| 699 | #define SESPARSE_CONST_HEADER_MAGIC UINT64_C(0x00000000cafebabe) |
| 700 | #define SESPARSE_VOLATILE_HEADER_MAGIC UINT64_C(0x00000000cafecafe) |
| 701 | |
| 702 | /* Strict checks - format not officially documented */ |
| 703 | static int check_se_sparse_const_header(VMDKSESparseConstHeader *header, |
| 704 | Error **errp) |
| 705 | { |
| 706 | header->magic = le64_to_cpu(header->magic); |
| 707 | header->version = le64_to_cpu(header->version); |
| 708 | header->grain_size = le64_to_cpu(header->grain_size); |
| 709 | header->grain_table_size = le64_to_cpu(header->grain_table_size); |
| 710 | header->flags = le64_to_cpu(header->flags); |
| 711 | header->reserved1 = le64_to_cpu(header->reserved1); |
| 712 | header->reserved2 = le64_to_cpu(header->reserved2); |
| 713 | header->reserved3 = le64_to_cpu(header->reserved3); |
| 714 | header->reserved4 = le64_to_cpu(header->reserved4); |
| 715 | |
| 716 | header->volatile_header_offset = |
| 717 | le64_to_cpu(header->volatile_header_offset); |
| 718 | header->volatile_header_size = le64_to_cpu(header->volatile_header_size); |
| 719 | |
| 720 | header->journal_header_offset = le64_to_cpu(header->journal_header_offset); |
| 721 | header->journal_header_size = le64_to_cpu(header->journal_header_size); |
| 722 | |
| 723 | header->journal_offset = le64_to_cpu(header->journal_offset); |
| 724 | header->journal_size = le64_to_cpu(header->journal_size); |
| 725 | |
| 726 | header->grain_dir_offset = le64_to_cpu(header->grain_dir_offset); |
| 727 | header->grain_dir_size = le64_to_cpu(header->grain_dir_size); |
| 728 | |
| 729 | header->grain_tables_offset = le64_to_cpu(header->grain_tables_offset); |
| 730 | header->grain_tables_size = le64_to_cpu(header->grain_tables_size); |
| 731 | |
| 732 | header->free_bitmap_offset = le64_to_cpu(header->free_bitmap_offset); |
| 733 | header->free_bitmap_size = le64_to_cpu(header->free_bitmap_size); |
| 734 | |
| 735 | header->backmap_offset = le64_to_cpu(header->backmap_offset); |
| 736 | header->backmap_size = le64_to_cpu(header->backmap_size); |
| 737 | |
| 738 | header->grains_offset = le64_to_cpu(header->grains_offset); |
| 739 | header->grains_size = le64_to_cpu(header->grains_size); |
| 740 | |
| 741 | if (header->magic != SESPARSE_CONST_HEADER_MAGIC) { |
| 742 | error_setg(errp, "Bad const header magic: 0x%016" PRIx64, |
| 743 | header->magic); |
| 744 | return -EINVAL; |
| 745 | } |
| 746 | |
| 747 | if (header->version != 0x0000000200000001) { |
| 748 | error_setg(errp, "Unsupported version: 0x%016" PRIx64, |
| 749 | header->version); |
| 750 | return -ENOTSUP; |
| 751 | } |
| 752 | |
| 753 | if (header->grain_size != 8) { |
| 754 | error_setg(errp, "Unsupported grain size: %" PRIu64, |
| 755 | header->grain_size); |
| 756 | return -ENOTSUP; |
| 757 | } |
| 758 | |
| 759 | if (header->grain_table_size != 64) { |
| 760 | error_setg(errp, "Unsupported grain table size: %" PRIu64, |
| 761 | header->grain_table_size); |
| 762 | return -ENOTSUP; |
| 763 | } |
| 764 | |
| 765 | if (header->flags != 0) { |
| 766 | error_setg(errp, "Unsupported flags: 0x%016" PRIx64, |
| 767 | header->flags); |
| 768 | return -ENOTSUP; |
| 769 | } |
| 770 | |
| 771 | if (header->reserved1 != 0 || header->reserved2 != 0 || |
| 772 | header->reserved3 != 0 || header->reserved4 != 0) { |
| 773 | error_setg(errp, "Unsupported reserved bits:" |
| 774 | " 0x%016" PRIx64 " 0x%016" PRIx64 |
| 775 | " 0x%016" PRIx64 " 0x%016" PRIx64, |
| 776 | header->reserved1, header->reserved2, |
| 777 | header->reserved3, header->reserved4); |
| 778 | return -ENOTSUP; |
| 779 | } |
| 780 | |
| 781 | /* check that padding is 0 */ |
| 782 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { |
| 783 | error_setg(errp, "Unsupported non-zero const header padding"); |
| 784 | return -ENOTSUP; |
| 785 | } |
| 786 | |
| 787 | return 0; |
| 788 | } |
| 789 | |
| 790 | static int check_se_sparse_volatile_header(VMDKSESparseVolatileHeader *header, |
| 791 | Error **errp) |
| 792 | { |
| 793 | header->magic = le64_to_cpu(header->magic); |
| 794 | header->free_gt_number = le64_to_cpu(header->free_gt_number); |
| 795 | header->next_txn_seq_number = le64_to_cpu(header->next_txn_seq_number); |
| 796 | header->replay_journal = le64_to_cpu(header->replay_journal); |
| 797 | |
| 798 | if (header->magic != SESPARSE_VOLATILE_HEADER_MAGIC) { |
| 799 | error_setg(errp, "Bad volatile header magic: 0x%016" PRIx64, |
| 800 | header->magic); |
| 801 | return -EINVAL; |
| 802 | } |
| 803 | |
| 804 | if (header->replay_journal) { |
| 805 | error_setg(errp, "Image is dirty, Replaying journal not supported"); |
| 806 | return -ENOTSUP; |
| 807 | } |
| 808 | |
| 809 | /* check that padding is 0 */ |
| 810 | if (!buffer_is_zero(header->pad, sizeof(header->pad))) { |
| 811 | error_setg(errp, "Unsupported non-zero volatile header padding"); |
| 812 | return -ENOTSUP; |
| 813 | } |
| 814 | |
| 815 | return 0; |
| 816 | } |
| 817 | |
| 818 | static int GRAPH_RDLOCK |
| 819 | vmdk_open_se_sparse(BlockDriverState *bs, BdrvChild *file, int flags, |
| 820 | Error **errp) |
| 821 | { |
| 822 | int ret; |
| 823 | VMDKSESparseConstHeader const_header; |
| 824 | VMDKSESparseVolatileHeader volatile_header; |
| 825 | VmdkExtent *extent = NULL; |
| 826 | |
| 827 | ret = bdrv_apply_auto_read_only(bs, |
| 828 | "No write support for seSparse images available", errp); |
| 829 | if (ret < 0) { |
| 830 | return ret; |
| 831 | } |
| 832 | |
| 833 | assert(sizeof(const_header) == SECTOR_SIZE); |
| 834 | |
| 835 | ret = bdrv_pread(file, 0, sizeof(const_header), &const_header, 0); |
| 836 | if (ret < 0) { |
| 837 | bdrv_refresh_filename(file->bs); |
| 838 | error_setg_errno(errp, -ret, |
| 839 | "Could not read const header from file '%s'", |
| 840 | file->bs->filename); |
| 841 | return ret; |
| 842 | } |
| 843 | |
| 844 | /* check const header */ |
| 845 | ret = check_se_sparse_const_header(&const_header, errp); |
| 846 | if (ret < 0) { |
| 847 | return ret; |
| 848 | } |
| 849 | |
| 850 | assert(sizeof(volatile_header) == SECTOR_SIZE); |
| 851 | |
| 852 | ret = bdrv_pread(file, const_header.volatile_header_offset * SECTOR_SIZE, |
| 853 | sizeof(volatile_header), &volatile_header, 0); |
| 854 | if (ret < 0) { |
| 855 | bdrv_refresh_filename(file->bs); |
| 856 | error_setg_errno(errp, -ret, |
| 857 | "Could not read volatile header from file '%s'", |
| 858 | file->bs->filename); |
| 859 | return ret; |
| 860 | } |
| 861 | |
| 862 | /* check volatile header */ |
| 863 | ret = check_se_sparse_volatile_header(&volatile_header, errp); |
| 864 | if (ret < 0) { |
| 865 | return ret; |
| 866 | } |
| 867 | |
| 868 | ret = vmdk_add_extent(bs, file, false, |
| 869 | const_header.capacity, |
| 870 | const_header.grain_dir_offset * SECTOR_SIZE, |
| 871 | 0, |
| 872 | const_header.grain_dir_size * |
| 873 | SECTOR_SIZE / sizeof(uint64_t), |
| 874 | const_header.grain_table_size * |
| 875 | SECTOR_SIZE / sizeof(uint64_t), |
| 876 | const_header.grain_size, |
| 877 | &extent, |
| 878 | errp); |
| 879 | if (ret < 0) { |
| 880 | return ret; |
| 881 | } |
| 882 | |
| 883 | extent->sesparse = true; |
| 884 | extent->sesparse_l2_tables_offset = const_header.grain_tables_offset; |
| 885 | extent->sesparse_clusters_offset = const_header.grains_offset; |
| 886 | extent->entry_size = sizeof(uint64_t); |
| 887 | |
| 888 | ret = vmdk_init_tables(bs, extent, errp); |
| 889 | if (ret) { |
| 890 | /* free extent allocated by vmdk_add_extent */ |
| 891 | vmdk_free_last_extent(bs); |
| 892 | } |
| 893 | |
| 894 | return ret; |
| 895 | } |
| 896 | |
| 897 | static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, |
| 898 | QDict *options, Error **errp); |
| 899 | |
| 900 | static char *vmdk_read_desc(BdrvChild *file, uint64_t desc_offset, Error **errp) |
| 901 | { |
| 902 | int64_t size; |
| 903 | char *buf; |
| 904 | int ret; |
| 905 | |
| 906 | size = bdrv_getlength(file->bs); |
| 907 | if (size < 0) { |
| 908 | error_setg_errno(errp, -size, "Could not access file"); |
| 909 | return NULL; |
| 910 | } |
| 911 | |
| 912 | if (size < 4) { |
| 913 | /* Both descriptor file and sparse image must be much larger than 4 |
| 914 | * bytes, also callers of vmdk_read_desc want to compare the first 4 |
| 915 | * bytes with VMDK4_MAGIC, let's error out if less is read. */ |
| 916 | error_setg(errp, "File is too small, not a valid image"); |
| 917 | return NULL; |
| 918 | } |
| 919 | |
| 920 | size = MIN(size, (1 << 20) - 1); /* avoid unbounded allocation */ |
| 921 | buf = g_malloc(size + 1); |
| 922 | |
| 923 | ret = bdrv_pread(file, desc_offset, size, buf, 0); |
| 924 | if (ret < 0) { |
| 925 | error_setg_errno(errp, -ret, "Could not read from file"); |
| 926 | g_free(buf); |
| 927 | return NULL; |
| 928 | } |
| 929 | buf[size] = 0; |
| 930 | |
| 931 | return buf; |
| 932 | } |
| 933 | |
| 934 | static int GRAPH_RDLOCK |
| 935 | vmdk_open_vmdk4(BlockDriverState *bs, BdrvChild *file, int flags, |
| 936 | QDict *options, Error **errp) |
| 937 | { |
| 938 | int ret; |
| 939 | uint32_t magic; |
| 940 | uint32_t l1_size, l1_entry_sectors; |
| 941 | VMDK4Header header; |
| 942 | VmdkExtent *extent = NULL; |
| 943 | BDRVVmdkState *s = bs->opaque; |
| 944 | int64_t l1_backup_offset = 0; |
| 945 | bool compressed; |
| 946 | |
| 947 | ret = bdrv_pread(file, sizeof(magic), sizeof(header), &header, 0); |
| 948 | if (ret < 0) { |
| 949 | bdrv_refresh_filename(file->bs); |
| 950 | error_setg_errno(errp, -ret, |
| 951 | "Could not read header from file '%s'", |
| 952 | file->bs->filename); |
| 953 | return -EINVAL; |
| 954 | } |
| 955 | if (header.capacity == 0) { |
| 956 | uint64_t desc_offset = le64_to_cpu(header.desc_offset); |
| 957 | if (desc_offset) { |
| 958 | char *buf = vmdk_read_desc(file, desc_offset << 9, errp); |
| 959 | if (!buf) { |
| 960 | return -EINVAL; |
| 961 | } |
| 962 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
| 963 | g_free(buf); |
| 964 | return ret; |
| 965 | } |
| 966 | } |
| 967 | |
| 968 | if (!s->create_type) { |
| 969 | s->create_type = g_strdup("monolithicSparse"); |
| 970 | } |
| 971 | |
| 972 | if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { |
| 973 | /* |
| 974 | * The footer takes precedence over the header, so read it in. The |
| 975 | * footer starts at offset -1024 from the end: One sector for the |
| 976 | * footer, and another one for the end-of-stream marker. |
| 977 | */ |
| 978 | struct { |
| 979 | struct { |
| 980 | uint64_t val; |
| 981 | uint32_t size; |
| 982 | uint32_t type; |
| 983 | uint8_t pad[512 - 16]; |
| 984 | } QEMU_PACKED footer_marker; |
| 985 | |
| 986 | uint32_t magic; |
| 987 | VMDK4Header header; |
| 988 | uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; |
| 989 | |
| 990 | struct { |
| 991 | uint64_t val; |
| 992 | uint32_t size; |
| 993 | uint32_t type; |
| 994 | uint8_t pad[512 - 16]; |
| 995 | } QEMU_PACKED eos_marker; |
| 996 | } QEMU_PACKED footer; |
| 997 | |
| 998 | ret = bdrv_pread(file, bs->file->bs->total_sectors * 512 - 1536, |
| 999 | sizeof(footer), &footer, 0); |
| 1000 | if (ret < 0) { |
| 1001 | error_setg_errno(errp, -ret, "Failed to read footer"); |
| 1002 | return ret; |
| 1003 | } |
| 1004 | |
| 1005 | /* Some sanity checks for the footer */ |
| 1006 | if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || |
| 1007 | le32_to_cpu(footer.footer_marker.size) != 0 || |
| 1008 | le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || |
| 1009 | le64_to_cpu(footer.eos_marker.val) != 0 || |
| 1010 | le32_to_cpu(footer.eos_marker.size) != 0 || |
| 1011 | le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) |
| 1012 | { |
| 1013 | error_setg(errp, "Invalid footer"); |
| 1014 | return -EINVAL; |
| 1015 | } |
| 1016 | |
| 1017 | header = footer.header; |
| 1018 | } |
| 1019 | |
| 1020 | compressed = |
| 1021 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; |
| 1022 | if (le32_to_cpu(header.version) > 3) { |
| 1023 | error_setg(errp, "Unsupported VMDK version %" PRIu32, |
| 1024 | le32_to_cpu(header.version)); |
| 1025 | return -ENOTSUP; |
| 1026 | } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR) && |
| 1027 | !compressed) { |
| 1028 | /* VMware KB 2064959 explains that version 3 added support for |
| 1029 | * persistent changed block tracking (CBT), and backup software can |
| 1030 | * read it as version=1 if it doesn't care about the changed area |
| 1031 | * information. So we are safe to enable read only. */ |
| 1032 | error_setg(errp, "VMDK version 3 must be read only"); |
| 1033 | return -EINVAL; |
| 1034 | } |
| 1035 | |
| 1036 | if (le32_to_cpu(header.num_gtes_per_gt) > 512) { |
| 1037 | error_setg(errp, "L2 table size too big"); |
| 1038 | return -EINVAL; |
| 1039 | } |
| 1040 | |
| 1041 | l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) |
| 1042 | * le64_to_cpu(header.granularity); |
| 1043 | if (l1_entry_sectors == 0) { |
| 1044 | error_setg(errp, "L1 entry size is invalid"); |
| 1045 | return -EINVAL; |
| 1046 | } |
| 1047 | l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) |
| 1048 | / l1_entry_sectors; |
| 1049 | if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { |
| 1050 | l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; |
| 1051 | } |
| 1052 | if (bdrv_nb_sectors(file->bs) < le64_to_cpu(header.grain_offset)) { |
| 1053 | error_setg(errp, "File truncated, expecting at least %" PRId64 " bytes", |
| 1054 | (int64_t)(le64_to_cpu(header.grain_offset) |
| 1055 | * BDRV_SECTOR_SIZE)); |
| 1056 | return -EINVAL; |
| 1057 | } |
| 1058 | |
| 1059 | ret = vmdk_add_extent(bs, file, false, |
| 1060 | le64_to_cpu(header.capacity), |
| 1061 | le64_to_cpu(header.gd_offset) << 9, |
| 1062 | l1_backup_offset, |
| 1063 | l1_size, |
| 1064 | le32_to_cpu(header.num_gtes_per_gt), |
| 1065 | le64_to_cpu(header.granularity), |
| 1066 | &extent, |
| 1067 | errp); |
| 1068 | if (ret < 0) { |
| 1069 | return ret; |
| 1070 | } |
| 1071 | extent->compressed = |
| 1072 | le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; |
| 1073 | if (extent->compressed) { |
| 1074 | g_free(s->create_type); |
| 1075 | s->create_type = g_strdup("streamOptimized"); |
| 1076 | } |
| 1077 | extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; |
| 1078 | extent->version = le32_to_cpu(header.version); |
| 1079 | extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; |
| 1080 | ret = vmdk_init_tables(bs, extent, errp); |
| 1081 | if (ret) { |
| 1082 | /* free extent allocated by vmdk_add_extent */ |
| 1083 | vmdk_free_last_extent(bs); |
| 1084 | } |
| 1085 | return ret; |
| 1086 | } |
| 1087 | |
| 1088 | /* find an option value out of descriptor file */ |
| 1089 | static int vmdk_parse_description(const char *desc, const char *opt_name, |
| 1090 | char *buf, int buf_size) |
| 1091 | { |
| 1092 | const char *opt_pos, *opt_end; |
| 1093 | const char *end = desc + strlen(desc); |
| 1094 | |
| 1095 | opt_pos = strstr(desc, opt_name); |
| 1096 | if (!opt_pos) { |
| 1097 | return VMDK_ERROR; |
| 1098 | } |
| 1099 | /* Skip "=\"" following opt_name */ |
| 1100 | opt_pos += strlen(opt_name) + 2; |
| 1101 | if (opt_pos >= end) { |
| 1102 | return VMDK_ERROR; |
| 1103 | } |
| 1104 | opt_end = opt_pos; |
| 1105 | while (opt_end < end && *opt_end != '"') { |
| 1106 | opt_end++; |
| 1107 | } |
| 1108 | if (opt_end == end || buf_size < opt_end - opt_pos + 1) { |
| 1109 | return VMDK_ERROR; |
| 1110 | } |
| 1111 | pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); |
| 1112 | return VMDK_OK; |
| 1113 | } |
| 1114 | |
| 1115 | /* Open an extent file and append to bs array */ |
| 1116 | static int GRAPH_RDLOCK |
| 1117 | vmdk_open_sparse(BlockDriverState *bs, BdrvChild *file, int flags, |
| 1118 | char *buf, QDict *options, Error **errp) |
| 1119 | { |
| 1120 | uint32_t magic; |
| 1121 | |
| 1122 | magic = ldl_be_p(buf); |
| 1123 | switch (magic) { |
| 1124 | case VMDK3_MAGIC: |
| 1125 | return vmdk_open_vmfs_sparse(bs, file, flags, errp); |
| 1126 | case VMDK4_MAGIC: |
| 1127 | return vmdk_open_vmdk4(bs, file, flags, options, errp); |
| 1128 | default: |
| 1129 | error_setg(errp, "Image not in VMDK format"); |
| 1130 | return -EINVAL; |
| 1131 | } |
| 1132 | } |
| 1133 | |
| 1134 | static const char *next_line(const char *s) |
| 1135 | { |
| 1136 | while (*s) { |
| 1137 | if (*s == '\n') { |
| 1138 | return s + 1; |
| 1139 | } |
| 1140 | s++; |
| 1141 | } |
| 1142 | return s; |
| 1143 | } |
| 1144 | |
| 1145 | static int GRAPH_RDLOCK |
| 1146 | vmdk_parse_extents(const char *desc, BlockDriverState *bs, QDict *options, |
| 1147 | Error **errp) |
| 1148 | { |
| 1149 | ERRP_GUARD(); |
| 1150 | int ret; |
| 1151 | int matches; |
| 1152 | char access[11]; |
| 1153 | char type[11]; |
| 1154 | char fname[512]; |
| 1155 | const char *p, *np; |
| 1156 | int64_t sectors = 0; |
| 1157 | int64_t flat_offset; |
| 1158 | char *desc_file_dir = NULL; |
| 1159 | char *extent_path; |
| 1160 | BdrvChild *extent_file; |
| 1161 | BdrvChildRole extent_role; |
| 1162 | BDRVVmdkState *s = bs->opaque; |
| 1163 | VmdkExtent *extent = NULL; |
| 1164 | char extent_opt_prefix[32]; |
| 1165 | Error *local_err = NULL; |
| 1166 | |
| 1167 | GLOBAL_STATE_CODE(); |
| 1168 | |
| 1169 | for (p = desc; *p; p = next_line(p)) { |
| 1170 | /* parse extent line in one of below formats: |
| 1171 | * |
| 1172 | * RW [size in sectors] FLAT "file-name.vmdk" OFFSET |
| 1173 | * RW [size in sectors] SPARSE "file-name.vmdk" |
| 1174 | * RW [size in sectors] VMFS "file-name.vmdk" |
| 1175 | * RW [size in sectors] VMFSSPARSE "file-name.vmdk" |
| 1176 | * RW [size in sectors] SESPARSE "file-name.vmdk" |
| 1177 | */ |
| 1178 | flat_offset = -1; |
| 1179 | matches = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, |
| 1180 | access, §ors, type, fname, &flat_offset); |
| 1181 | if (matches < 4 || strcmp(access, "RW")) { |
| 1182 | continue; |
| 1183 | } else if (!strcmp(type, "FLAT")) { |
| 1184 | if (matches != 5 || flat_offset < 0) { |
| 1185 | goto invalid; |
| 1186 | } |
| 1187 | } else if (!strcmp(type, "VMFS")) { |
| 1188 | if (matches == 4) { |
| 1189 | flat_offset = 0; |
| 1190 | } else { |
| 1191 | goto invalid; |
| 1192 | } |
| 1193 | } else if (matches != 4) { |
| 1194 | goto invalid; |
| 1195 | } |
| 1196 | |
| 1197 | if (sectors <= 0 || |
| 1198 | (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && |
| 1199 | strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE") && |
| 1200 | strcmp(type, "SESPARSE")) || |
| 1201 | (strcmp(access, "RW"))) { |
| 1202 | continue; |
| 1203 | } |
| 1204 | |
| 1205 | if (path_is_absolute(fname)) { |
| 1206 | extent_path = g_strdup(fname); |
| 1207 | } else { |
| 1208 | if (!desc_file_dir) { |
| 1209 | desc_file_dir = bdrv_dirname(bs->file->bs, errp); |
| 1210 | if (!desc_file_dir) { |
| 1211 | bdrv_refresh_filename(bs->file->bs); |
| 1212 | error_prepend(errp, "Cannot use relative paths with VMDK " |
| 1213 | "descriptor file '%s': ", |
| 1214 | bs->file->bs->filename); |
| 1215 | ret = -EINVAL; |
| 1216 | goto out; |
| 1217 | } |
| 1218 | } |
| 1219 | |
| 1220 | extent_path = g_strconcat(desc_file_dir, fname, NULL); |
| 1221 | } |
| 1222 | |
| 1223 | ret = snprintf(extent_opt_prefix, 32, "extents.%d", s->num_extents); |
| 1224 | assert(ret < 32); |
| 1225 | |
| 1226 | extent_role = BDRV_CHILD_DATA; |
| 1227 | if (strcmp(type, "FLAT") != 0 && strcmp(type, "VMFS") != 0) { |
| 1228 | /* non-flat extents have metadata */ |
| 1229 | extent_role |= BDRV_CHILD_METADATA; |
| 1230 | } |
| 1231 | |
| 1232 | bdrv_graph_rdunlock_main_loop(); |
| 1233 | extent_file = bdrv_open_child(extent_path, options, extent_opt_prefix, |
| 1234 | bs, &child_of_bds, extent_role, false, |
| 1235 | &local_err); |
| 1236 | bdrv_graph_rdlock_main_loop(); |
| 1237 | g_free(extent_path); |
| 1238 | if (!extent_file) { |
| 1239 | error_propagate(errp, local_err); |
| 1240 | ret = -EINVAL; |
| 1241 | goto out; |
| 1242 | } |
| 1243 | |
| 1244 | /* save to extents array */ |
| 1245 | if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { |
| 1246 | /* FLAT extent */ |
| 1247 | |
| 1248 | ret = vmdk_add_extent(bs, extent_file, true, sectors, |
| 1249 | 0, 0, 0, 0, 0, &extent, errp); |
| 1250 | if (ret < 0) { |
| 1251 | bdrv_graph_rdunlock_main_loop(); |
| 1252 | bdrv_graph_wrlock_drained(); |
| 1253 | bdrv_unref_child(bs, extent_file); |
| 1254 | bdrv_graph_wrunlock(); |
| 1255 | bdrv_graph_rdlock_main_loop(); |
| 1256 | goto out; |
| 1257 | } |
| 1258 | extent->flat_start_offset = flat_offset << 9; |
| 1259 | } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { |
| 1260 | /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ |
| 1261 | char *buf = vmdk_read_desc(extent_file, 0, errp); |
| 1262 | if (!buf) { |
| 1263 | ret = -EINVAL; |
| 1264 | } else { |
| 1265 | ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, |
| 1266 | options, errp); |
| 1267 | } |
| 1268 | g_free(buf); |
| 1269 | if (ret) { |
| 1270 | bdrv_graph_rdunlock_main_loop(); |
| 1271 | bdrv_graph_wrlock_drained(); |
| 1272 | bdrv_unref_child(bs, extent_file); |
| 1273 | bdrv_graph_wrunlock(); |
| 1274 | bdrv_graph_rdlock_main_loop(); |
| 1275 | goto out; |
| 1276 | } |
| 1277 | extent = &s->extents[s->num_extents - 1]; |
| 1278 | } else if (!strcmp(type, "SESPARSE")) { |
| 1279 | ret = vmdk_open_se_sparse(bs, extent_file, bs->open_flags, errp); |
| 1280 | if (ret) { |
| 1281 | bdrv_graph_rdunlock_main_loop(); |
| 1282 | bdrv_graph_wrlock_drained(); |
| 1283 | bdrv_unref_child(bs, extent_file); |
| 1284 | bdrv_graph_wrunlock(); |
| 1285 | bdrv_graph_rdlock_main_loop(); |
| 1286 | goto out; |
| 1287 | } |
| 1288 | extent = &s->extents[s->num_extents - 1]; |
| 1289 | } else { |
| 1290 | error_setg(errp, "Unsupported extent type '%s'", type); |
| 1291 | bdrv_graph_rdunlock_main_loop(); |
| 1292 | bdrv_graph_wrlock_drained(); |
| 1293 | bdrv_unref_child(bs, extent_file); |
| 1294 | bdrv_graph_wrunlock(); |
| 1295 | bdrv_graph_rdlock_main_loop(); |
| 1296 | ret = -ENOTSUP; |
| 1297 | goto out; |
| 1298 | } |
| 1299 | extent->type = g_strdup(type); |
| 1300 | } |
| 1301 | |
| 1302 | ret = 0; |
| 1303 | goto out; |
| 1304 | |
| 1305 | invalid: |
| 1306 | np = next_line(p); |
| 1307 | assert(np != p); |
| 1308 | if (np[-1] == '\n') { |
| 1309 | np--; |
| 1310 | } |
| 1311 | error_setg(errp, "Invalid extent line: %.*s", (int)(np - p), p); |
| 1312 | ret = -EINVAL; |
| 1313 | |
| 1314 | out: |
| 1315 | g_free(desc_file_dir); |
| 1316 | return ret; |
| 1317 | } |
| 1318 | |
| 1319 | static int GRAPH_RDLOCK |
| 1320 | vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, QDict *options, |
| 1321 | Error **errp) |
| 1322 | { |
| 1323 | int ret; |
| 1324 | char ct[128]; |
| 1325 | BDRVVmdkState *s = bs->opaque; |
| 1326 | |
| 1327 | if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { |
| 1328 | error_setg(errp, "invalid VMDK image descriptor"); |
| 1329 | ret = -EINVAL; |
| 1330 | goto exit; |
| 1331 | } |
| 1332 | if (strcmp(ct, "monolithicFlat") && |
| 1333 | strcmp(ct, "vmfs") && |
| 1334 | strcmp(ct, "vmfsSparse") && |
| 1335 | strcmp(ct, "seSparse") && |
| 1336 | strcmp(ct, "twoGbMaxExtentSparse") && |
| 1337 | strcmp(ct, "twoGbMaxExtentFlat")) { |
| 1338 | error_setg(errp, "Unsupported image type '%s'", ct); |
| 1339 | ret = -ENOTSUP; |
| 1340 | goto exit; |
| 1341 | } |
| 1342 | s->create_type = g_strdup(ct); |
| 1343 | s->desc_offset = 0; |
| 1344 | ret = vmdk_parse_extents(buf, bs, options, errp); |
| 1345 | exit: |
| 1346 | return ret; |
| 1347 | } |
| 1348 | |
| 1349 | static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, |
| 1350 | Error **errp) |
| 1351 | { |
| 1352 | char *buf; |
| 1353 | int ret; |
| 1354 | BDRVVmdkState *s = bs->opaque; |
| 1355 | uint32_t magic; |
| 1356 | |
| 1357 | ret = bdrv_open_file_child(NULL, options, "file", bs, errp); |
| 1358 | if (ret < 0) { |
| 1359 | return ret; |
| 1360 | } |
| 1361 | |
| 1362 | GRAPH_RDLOCK_GUARD_MAINLOOP(); |
| 1363 | |
| 1364 | buf = vmdk_read_desc(bs->file, 0, errp); |
| 1365 | if (!buf) { |
| 1366 | return -EINVAL; |
| 1367 | } |
| 1368 | |
| 1369 | magic = ldl_be_p(buf); |
| 1370 | switch (magic) { |
| 1371 | case VMDK3_MAGIC: |
| 1372 | case VMDK4_MAGIC: |
| 1373 | ret = vmdk_open_sparse(bs, bs->file, flags, buf, options, |
| 1374 | errp); |
| 1375 | s->desc_offset = 0x200; |
| 1376 | break; |
| 1377 | default: |
| 1378 | /* No data in the descriptor file */ |
| 1379 | bs->file->role &= ~BDRV_CHILD_DATA; |
| 1380 | |
| 1381 | /* Must succeed because we have given up permissions if anything */ |
| 1382 | bdrv_child_refresh_perms(bs, bs->file, &error_abort); |
| 1383 | |
| 1384 | ret = vmdk_open_desc_file(bs, flags, buf, options, errp); |
| 1385 | break; |
| 1386 | } |
| 1387 | if (ret) { |
| 1388 | goto fail; |
| 1389 | } |
| 1390 | |
| 1391 | /* try to open parent images, if exist */ |
| 1392 | ret = vmdk_parent_open(bs); |
| 1393 | if (ret) { |
| 1394 | goto fail; |
| 1395 | } |
| 1396 | ret = vmdk_read_cid(bs, 0, &s->cid); |
| 1397 | if (ret) { |
| 1398 | goto fail; |
| 1399 | } |
| 1400 | ret = vmdk_read_cid(bs, 1, &s->parent_cid); |
| 1401 | if (ret) { |
| 1402 | goto fail; |
| 1403 | } |
| 1404 | qemu_co_mutex_init(&s->lock); |
| 1405 | |
| 1406 | /* Disable migration when VMDK images are used */ |
| 1407 | error_setg(&s->migration_blocker, "The vmdk format used by node '%s' " |
| 1408 | "does not support live migration", |
| 1409 | bdrv_get_device_or_node_name(bs)); |
| 1410 | ret = migrate_add_blocker_normal(&s->migration_blocker, errp); |
| 1411 | if (ret < 0) { |
| 1412 | goto fail; |
| 1413 | } |
| 1414 | |
| 1415 | g_free(buf); |
| 1416 | return 0; |
| 1417 | |
| 1418 | fail: |
| 1419 | g_free(buf); |
| 1420 | g_free(s->create_type); |
| 1421 | s->create_type = NULL; |
| 1422 | vmdk_free_extents(bs); |
| 1423 | return ret; |
| 1424 | } |
| 1425 | |
| 1426 | |
| 1427 | static void vmdk_refresh_limits(BlockDriverState *bs, Error **errp) |
| 1428 | { |
| 1429 | BDRVVmdkState *s = bs->opaque; |
| 1430 | int i; |
| 1431 | |
| 1432 | for (i = 0; i < s->num_extents; i++) { |
| 1433 | if (!s->extents[i].flat) { |
| 1434 | bs->bl.pwrite_zeroes_alignment = |
| 1435 | MAX(bs->bl.pwrite_zeroes_alignment, |
| 1436 | s->extents[i].cluster_sectors << BDRV_SECTOR_BITS); |
| 1437 | } |
| 1438 | } |
| 1439 | } |
| 1440 | |
| 1441 | /** |
| 1442 | * get_whole_cluster |
| 1443 | * |
| 1444 | * Copy backing file's cluster that covers @sector_num, otherwise write zero, |
| 1445 | * to the cluster at @cluster_sector_num. If @zeroed is true, we're overwriting |
| 1446 | * a zeroed cluster in the current layer and must not copy data from the |
| 1447 | * backing file. |
| 1448 | * |
| 1449 | * If @skip_start_sector < @skip_end_sector, the relative range |
| 1450 | * [@skip_start_sector, @skip_end_sector) is not copied or written, and leave |
| 1451 | * it for call to write user data in the request. |
| 1452 | */ |
| 1453 | static int coroutine_fn GRAPH_RDLOCK |
| 1454 | get_whole_cluster(BlockDriverState *bs, VmdkExtent *extent, |
| 1455 | uint64_t cluster_offset, uint64_t offset, |
| 1456 | uint64_t skip_start_bytes, uint64_t skip_end_bytes, |
| 1457 | bool zeroed) |
| 1458 | { |
| 1459 | int ret = VMDK_OK; |
| 1460 | int64_t cluster_bytes; |
| 1461 | uint8_t *whole_grain; |
| 1462 | bool copy_from_backing; |
| 1463 | |
| 1464 | /* For COW, align request sector_num to cluster start */ |
| 1465 | cluster_bytes = extent->cluster_sectors << BDRV_SECTOR_BITS; |
| 1466 | offset = QEMU_ALIGN_DOWN(offset, cluster_bytes); |
| 1467 | whole_grain = qemu_blockalign(bs, cluster_bytes); |
| 1468 | copy_from_backing = bs->backing && !zeroed; |
| 1469 | |
| 1470 | if (!copy_from_backing) { |
| 1471 | memset(whole_grain, 0, skip_start_bytes); |
| 1472 | memset(whole_grain + skip_end_bytes, 0, cluster_bytes - skip_end_bytes); |
| 1473 | } |
| 1474 | |
| 1475 | assert(skip_end_bytes <= cluster_bytes); |
| 1476 | /* we will be here if it's first write on non-exist grain(cluster). |
| 1477 | * try to read from parent image, if exist */ |
| 1478 | if (bs->backing && !vmdk_is_cid_valid(bs)) { |
| 1479 | ret = VMDK_ERROR; |
| 1480 | goto exit; |
| 1481 | } |
| 1482 | |
| 1483 | /* Read backing data before skip range */ |
| 1484 | if (skip_start_bytes > 0) { |
| 1485 | if (copy_from_backing) { |
| 1486 | /* qcow2 emits this on bs->file instead of bs->backing */ |
| 1487 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_READ); |
| 1488 | ret = bdrv_co_pread(bs->backing, offset, skip_start_bytes, |
| 1489 | whole_grain, 0); |
| 1490 | if (ret < 0) { |
| 1491 | ret = VMDK_ERROR; |
| 1492 | goto exit; |
| 1493 | } |
| 1494 | } |
| 1495 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_WRITE); |
| 1496 | ret = bdrv_co_pwrite(extent->file, cluster_offset, skip_start_bytes, |
| 1497 | whole_grain, 0); |
| 1498 | if (ret < 0) { |
| 1499 | ret = VMDK_ERROR; |
| 1500 | goto exit; |
| 1501 | } |
| 1502 | } |
| 1503 | /* Read backing data after skip range */ |
| 1504 | if (skip_end_bytes < cluster_bytes) { |
| 1505 | if (copy_from_backing) { |
| 1506 | /* qcow2 emits this on bs->file instead of bs->backing */ |
| 1507 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_READ); |
| 1508 | ret = bdrv_co_pread(bs->backing, offset + skip_end_bytes, |
| 1509 | cluster_bytes - skip_end_bytes, |
| 1510 | whole_grain + skip_end_bytes, 0); |
| 1511 | if (ret < 0) { |
| 1512 | ret = VMDK_ERROR; |
| 1513 | goto exit; |
| 1514 | } |
| 1515 | } |
| 1516 | BLKDBG_CO_EVENT(extent->file, BLKDBG_COW_WRITE); |
| 1517 | ret = bdrv_co_pwrite(extent->file, cluster_offset + skip_end_bytes, |
| 1518 | cluster_bytes - skip_end_bytes, |
| 1519 | whole_grain + skip_end_bytes, 0); |
| 1520 | if (ret < 0) { |
| 1521 | ret = VMDK_ERROR; |
| 1522 | goto exit; |
| 1523 | } |
| 1524 | } |
| 1525 | |
| 1526 | ret = VMDK_OK; |
| 1527 | exit: |
| 1528 | qemu_vfree(whole_grain); |
| 1529 | return ret; |
| 1530 | } |
| 1531 | |
| 1532 | static int coroutine_fn GRAPH_RDLOCK |
| 1533 | vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data, uint32_t offset) |
| 1534 | { |
| 1535 | offset = cpu_to_le32(offset); |
| 1536 | /* update L2 table */ |
| 1537 | BLKDBG_CO_EVENT(extent->file, BLKDBG_L2_UPDATE); |
| 1538 | if (bdrv_co_pwrite(extent->file, |
| 1539 | ((int64_t)m_data->l2_offset * 512) |
| 1540 | + (m_data->l2_index * sizeof(offset)), |
| 1541 | sizeof(offset), &offset, 0) < 0) { |
| 1542 | return VMDK_ERROR; |
| 1543 | } |
| 1544 | /* update backup L2 table */ |
| 1545 | if (extent->l1_backup_table_offset != 0) { |
| 1546 | m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; |
| 1547 | if (bdrv_co_pwrite(extent->file, |
| 1548 | ((int64_t)m_data->l2_offset * 512) |
| 1549 | + (m_data->l2_index * sizeof(offset)), |
| 1550 | sizeof(offset), &offset, 0) < 0) { |
| 1551 | return VMDK_ERROR; |
| 1552 | } |
| 1553 | } |
| 1554 | if (bdrv_co_flush(extent->file->bs) < 0) { |
| 1555 | return VMDK_ERROR; |
| 1556 | } |
| 1557 | if (m_data->l2_cache_entry) { |
| 1558 | *m_data->l2_cache_entry = offset; |
| 1559 | } |
| 1560 | |
| 1561 | return VMDK_OK; |
| 1562 | } |
| 1563 | |
| 1564 | /** |
| 1565 | * get_cluster_offset |
| 1566 | * |
| 1567 | * Look up cluster offset in extent file by sector number, and store in |
| 1568 | * @cluster_offset. |
| 1569 | * |
| 1570 | * For flat extents, the start offset as parsed from the description file is |
| 1571 | * returned. |
| 1572 | * |
| 1573 | * For sparse extents, look up in L1, L2 table. If allocate is true, return an |
| 1574 | * offset for a new cluster and update L2 cache. If there is a backing file, |
| 1575 | * COW is done before returning; otherwise, zeroes are written to the allocated |
| 1576 | * cluster. Both COW and zero writing skips the sector range |
| 1577 | * [@skip_start_sector, @skip_end_sector) passed in by caller, because caller |
| 1578 | * has new data to write there. |
| 1579 | * |
| 1580 | * Returns: VMDK_OK if cluster exists and mapped in the image. |
| 1581 | * VMDK_UNALLOC if cluster is not mapped and @allocate is false. |
| 1582 | * VMDK_ERROR if failed. |
| 1583 | */ |
| 1584 | static int coroutine_fn GRAPH_RDLOCK |
| 1585 | get_cluster_offset(BlockDriverState *bs, VmdkExtent *extent, |
| 1586 | VmdkMetaData *m_data, uint64_t offset, bool allocate, |
| 1587 | uint64_t *cluster_offset, uint64_t skip_start_bytes, |
| 1588 | uint64_t skip_end_bytes) |
| 1589 | { |
| 1590 | unsigned int l1_index, l2_offset, l2_index; |
| 1591 | int min_index, i, j; |
| 1592 | uint32_t min_count; |
| 1593 | void *l2_table; |
| 1594 | bool zeroed = false; |
| 1595 | int64_t ret; |
| 1596 | int64_t cluster_sector; |
| 1597 | unsigned int l2_size_bytes = extent->l2_size * extent->entry_size; |
| 1598 | |
| 1599 | if (m_data) { |
| 1600 | m_data->new_allocation = false; |
| 1601 | } |
| 1602 | if (extent->flat) { |
| 1603 | *cluster_offset = extent->flat_start_offset; |
| 1604 | return VMDK_OK; |
| 1605 | } |
| 1606 | |
| 1607 | offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; |
| 1608 | l1_index = (offset >> 9) / extent->l1_entry_sectors; |
| 1609 | if (l1_index >= extent->l1_size) { |
| 1610 | return VMDK_ERROR; |
| 1611 | } |
| 1612 | if (extent->sesparse) { |
| 1613 | uint64_t l2_offset_u64; |
| 1614 | |
| 1615 | assert(extent->entry_size == sizeof(uint64_t)); |
| 1616 | |
| 1617 | l2_offset_u64 = ((uint64_t *)extent->l1_table)[l1_index]; |
| 1618 | if (l2_offset_u64 == 0) { |
| 1619 | l2_offset = 0; |
| 1620 | } else if ((l2_offset_u64 & 0xffffffff00000000) != 0x1000000000000000) { |
| 1621 | /* |
| 1622 | * Top most nibble is 0x1 if grain table is allocated. |
| 1623 | * strict check - top most 4 bytes must be 0x10000000 since max |
| 1624 | * supported size is 64TB for disk - so no more than 64TB / 16MB |
| 1625 | * grain directories which is smaller than uint32, |
| 1626 | * where 16MB is the only supported default grain table coverage. |
| 1627 | */ |
| 1628 | return VMDK_ERROR; |
| 1629 | } else { |
| 1630 | l2_offset_u64 = l2_offset_u64 & 0x00000000ffffffff; |
| 1631 | l2_offset_u64 = extent->sesparse_l2_tables_offset + |
| 1632 | l2_offset_u64 * l2_size_bytes / SECTOR_SIZE; |
| 1633 | if (l2_offset_u64 > 0x00000000ffffffff) { |
| 1634 | return VMDK_ERROR; |
| 1635 | } |
| 1636 | l2_offset = (unsigned int)(l2_offset_u64); |
| 1637 | } |
| 1638 | } else { |
| 1639 | assert(extent->entry_size == sizeof(uint32_t)); |
| 1640 | l2_offset = ((uint32_t *)extent->l1_table)[l1_index]; |
| 1641 | } |
| 1642 | if (!l2_offset) { |
| 1643 | return VMDK_UNALLOC; |
| 1644 | } |
| 1645 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
| 1646 | if (l2_offset == extent->l2_cache_offsets[i]) { |
| 1647 | /* increment the hit count */ |
| 1648 | if (++extent->l2_cache_counts[i] == 0xffffffff) { |
| 1649 | for (j = 0; j < L2_CACHE_SIZE; j++) { |
| 1650 | extent->l2_cache_counts[j] >>= 1; |
| 1651 | } |
| 1652 | } |
| 1653 | l2_table = (char *)extent->l2_cache + (i * l2_size_bytes); |
| 1654 | goto found; |
| 1655 | } |
| 1656 | } |
| 1657 | /* not found: load a new entry in the least used one */ |
| 1658 | min_index = 0; |
| 1659 | min_count = 0xffffffff; |
| 1660 | for (i = 0; i < L2_CACHE_SIZE; i++) { |
| 1661 | if (extent->l2_cache_counts[i] < min_count) { |
| 1662 | min_count = extent->l2_cache_counts[i]; |
| 1663 | min_index = i; |
| 1664 | } |
| 1665 | } |
| 1666 | l2_table = (char *)extent->l2_cache + (min_index * l2_size_bytes); |
| 1667 | BLKDBG_CO_EVENT(extent->file, BLKDBG_L2_LOAD); |
| 1668 | if (bdrv_co_pread(extent->file, |
| 1669 | (int64_t)l2_offset * 512, |
| 1670 | l2_size_bytes, |
| 1671 | l2_table, 0 |
| 1672 | ) < 0) { |
| 1673 | return VMDK_ERROR; |
| 1674 | } |
| 1675 | |
| 1676 | extent->l2_cache_offsets[min_index] = l2_offset; |
| 1677 | extent->l2_cache_counts[min_index] = 1; |
| 1678 | found: |
| 1679 | l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; |
| 1680 | if (m_data) { |
| 1681 | m_data->l1_index = l1_index; |
| 1682 | m_data->l2_index = l2_index; |
| 1683 | m_data->l2_offset = l2_offset; |
| 1684 | m_data->l2_cache_entry = ((uint32_t *)l2_table) + l2_index; |
| 1685 | } |
| 1686 | |
| 1687 | if (extent->sesparse) { |
| 1688 | cluster_sector = le64_to_cpu(((uint64_t *)l2_table)[l2_index]); |
| 1689 | switch (cluster_sector & 0xf000000000000000) { |
| 1690 | case 0x0000000000000000: |
| 1691 | /* unallocated grain */ |
| 1692 | if (cluster_sector != 0) { |
| 1693 | return VMDK_ERROR; |
| 1694 | } |
| 1695 | break; |
| 1696 | case 0x1000000000000000: |
| 1697 | /* scsi-unmapped grain - fallthrough */ |
| 1698 | case 0x2000000000000000: |
| 1699 | /* zero grain */ |
| 1700 | zeroed = true; |
| 1701 | break; |
| 1702 | case 0x3000000000000000: |
| 1703 | /* allocated grain */ |
| 1704 | cluster_sector = (((cluster_sector & 0x0fff000000000000) >> 48) | |
| 1705 | ((cluster_sector & 0x0000ffffffffffff) << 12)); |
| 1706 | cluster_sector = extent->sesparse_clusters_offset + |
| 1707 | cluster_sector * extent->cluster_sectors; |
| 1708 | break; |
| 1709 | default: |
| 1710 | return VMDK_ERROR; |
| 1711 | } |
| 1712 | } else { |
| 1713 | cluster_sector = le32_to_cpu(((uint32_t *)l2_table)[l2_index]); |
| 1714 | |
| 1715 | if (extent->has_zero_grain && cluster_sector == VMDK_GTE_ZEROED) { |
| 1716 | zeroed = true; |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | if (!cluster_sector || zeroed) { |
| 1721 | if (!allocate) { |
| 1722 | return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; |
| 1723 | } |
| 1724 | assert(!extent->sesparse); |
| 1725 | |
| 1726 | if (extent->next_cluster_sector >= VMDK_EXTENT_MAX_SECTORS) { |
| 1727 | return VMDK_ERROR; |
| 1728 | } |
| 1729 | |
| 1730 | cluster_sector = extent->next_cluster_sector; |
| 1731 | extent->next_cluster_sector += extent->cluster_sectors; |
| 1732 | |
| 1733 | /* First of all we write grain itself, to avoid race condition |
| 1734 | * that may to corrupt the image. |
| 1735 | * This problem may occur because of insufficient space on host disk |
| 1736 | * or inappropriate VM shutdown. |
| 1737 | */ |
| 1738 | ret = get_whole_cluster(bs, extent, cluster_sector * BDRV_SECTOR_SIZE, |
| 1739 | offset, skip_start_bytes, skip_end_bytes, |
| 1740 | zeroed); |
| 1741 | if (ret) { |
| 1742 | return ret; |
| 1743 | } |
| 1744 | if (m_data) { |
| 1745 | m_data->new_allocation = true; |
| 1746 | } |
| 1747 | } |
| 1748 | *cluster_offset = cluster_sector << BDRV_SECTOR_BITS; |
| 1749 | return VMDK_OK; |
| 1750 | } |
| 1751 | |
| 1752 | static VmdkExtent *find_extent(BDRVVmdkState *s, |
| 1753 | int64_t sector_num, VmdkExtent *start_hint) |
| 1754 | { |
| 1755 | VmdkExtent *extent = start_hint; |
| 1756 | |
| 1757 | if (!extent) { |
| 1758 | extent = &s->extents[0]; |
| 1759 | } |
| 1760 | while (extent < &s->extents[s->num_extents]) { |
| 1761 | if (sector_num < extent->end_sector) { |
| 1762 | return extent; |
| 1763 | } |
| 1764 | extent++; |
| 1765 | } |
| 1766 | return NULL; |
| 1767 | } |
| 1768 | |
| 1769 | static inline uint64_t vmdk_find_offset_in_cluster(VmdkExtent *extent, |
| 1770 | int64_t offset) |
| 1771 | { |
| 1772 | uint64_t extent_begin_offset, extent_relative_offset; |
| 1773 | uint64_t cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
| 1774 | |
| 1775 | extent_begin_offset = |
| 1776 | (extent->end_sector - extent->sectors) * BDRV_SECTOR_SIZE; |
| 1777 | extent_relative_offset = offset - extent_begin_offset; |
| 1778 | return extent_relative_offset % cluster_size; |
| 1779 | } |
| 1780 | |
| 1781 | static int coroutine_fn GRAPH_RDLOCK |
| 1782 | vmdk_co_block_status(BlockDriverState *bs, unsigned int mode, |
| 1783 | int64_t offset, int64_t bytes, int64_t *pnum, |
| 1784 | int64_t *map, BlockDriverState **file) |
| 1785 | { |
| 1786 | BDRVVmdkState *s = bs->opaque; |
| 1787 | int64_t index_in_cluster, n, ret; |
| 1788 | uint64_t cluster_offset; |
| 1789 | VmdkExtent *extent; |
| 1790 | |
| 1791 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, NULL); |
| 1792 | if (!extent) { |
| 1793 | return -EIO; |
| 1794 | } |
| 1795 | qemu_co_mutex_lock(&s->lock); |
| 1796 | ret = get_cluster_offset(bs, extent, NULL, offset, false, &cluster_offset, |
| 1797 | 0, 0); |
| 1798 | qemu_co_mutex_unlock(&s->lock); |
| 1799 | |
| 1800 | index_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
| 1801 | switch (ret) { |
| 1802 | case VMDK_ERROR: |
| 1803 | ret = -EIO; |
| 1804 | break; |
| 1805 | case VMDK_UNALLOC: |
| 1806 | ret = 0; |
| 1807 | break; |
| 1808 | case VMDK_ZEROED: |
| 1809 | ret = BDRV_BLOCK_ZERO; |
| 1810 | break; |
| 1811 | case VMDK_OK: |
| 1812 | ret = BDRV_BLOCK_DATA; |
| 1813 | if (!extent->compressed) { |
| 1814 | ret |= BDRV_BLOCK_OFFSET_VALID; |
| 1815 | *map = cluster_offset + index_in_cluster; |
| 1816 | if (extent->flat) { |
| 1817 | ret |= BDRV_BLOCK_RECURSE; |
| 1818 | } |
| 1819 | } else { |
| 1820 | ret |= BDRV_BLOCK_COMPRESSED; |
| 1821 | } |
| 1822 | *file = extent->file->bs; |
| 1823 | break; |
| 1824 | } |
| 1825 | |
| 1826 | n = extent->cluster_sectors * BDRV_SECTOR_SIZE - index_in_cluster; |
| 1827 | *pnum = MIN(n, bytes); |
| 1828 | return ret; |
| 1829 | } |
| 1830 | |
| 1831 | static int coroutine_fn GRAPH_RDLOCK |
| 1832 | vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, |
| 1833 | int64_t offset_in_cluster, QEMUIOVector *qiov, |
| 1834 | uint64_t qiov_offset, uint64_t n_bytes, |
| 1835 | uint64_t offset) |
| 1836 | { |
| 1837 | int ret; |
| 1838 | VmdkGrainMarker *data = NULL; |
| 1839 | uLongf buf_len; |
| 1840 | QEMUIOVector local_qiov; |
| 1841 | int64_t write_offset; |
| 1842 | int64_t write_end_sector; |
| 1843 | |
| 1844 | if (extent->compressed) { |
| 1845 | void *compressed_data; |
| 1846 | |
| 1847 | /* Only whole clusters */ |
| 1848 | if (offset_in_cluster || |
| 1849 | n_bytes > (extent->cluster_sectors * SECTOR_SIZE) || |
| 1850 | (n_bytes < (extent->cluster_sectors * SECTOR_SIZE) && |
| 1851 | offset + n_bytes != extent->end_sector * SECTOR_SIZE)) |
| 1852 | { |
| 1853 | ret = -EINVAL; |
| 1854 | goto out; |
| 1855 | } |
| 1856 | |
| 1857 | if (!extent->has_marker) { |
| 1858 | ret = -EINVAL; |
| 1859 | goto out; |
| 1860 | } |
| 1861 | buf_len = (extent->cluster_sectors << 9) * 2; |
| 1862 | data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); |
| 1863 | |
| 1864 | compressed_data = g_malloc(n_bytes); |
| 1865 | qemu_iovec_to_buf(qiov, qiov_offset, compressed_data, n_bytes); |
| 1866 | ret = compress(data->data, &buf_len, compressed_data, n_bytes); |
| 1867 | g_free(compressed_data); |
| 1868 | |
| 1869 | if (ret != Z_OK || buf_len == 0) { |
| 1870 | ret = -EINVAL; |
| 1871 | goto out; |
| 1872 | } |
| 1873 | |
| 1874 | data->lba = cpu_to_le64(offset >> BDRV_SECTOR_BITS); |
| 1875 | data->size = cpu_to_le32(buf_len); |
| 1876 | |
| 1877 | n_bytes = buf_len + sizeof(VmdkGrainMarker); |
| 1878 | qemu_iovec_init_buf(&local_qiov, data, n_bytes); |
| 1879 | |
| 1880 | BLKDBG_CO_EVENT(extent->file, BLKDBG_WRITE_COMPRESSED); |
| 1881 | } else { |
| 1882 | qemu_iovec_init(&local_qiov, qiov->niov); |
| 1883 | qemu_iovec_concat(&local_qiov, qiov, qiov_offset, n_bytes); |
| 1884 | |
| 1885 | BLKDBG_CO_EVENT(extent->file, BLKDBG_WRITE_AIO); |
| 1886 | } |
| 1887 | |
| 1888 | write_offset = cluster_offset + offset_in_cluster; |
| 1889 | ret = bdrv_co_pwritev(extent->file, write_offset, n_bytes, |
| 1890 | &local_qiov, 0); |
| 1891 | |
| 1892 | write_end_sector = DIV_ROUND_UP(write_offset + n_bytes, BDRV_SECTOR_SIZE); |
| 1893 | |
| 1894 | if (extent->compressed) { |
| 1895 | extent->next_cluster_sector = write_end_sector; |
| 1896 | } else { |
| 1897 | extent->next_cluster_sector = MAX(extent->next_cluster_sector, |
| 1898 | write_end_sector); |
| 1899 | } |
| 1900 | |
| 1901 | if (ret < 0) { |
| 1902 | goto out; |
| 1903 | } |
| 1904 | ret = 0; |
| 1905 | out: |
| 1906 | g_free(data); |
| 1907 | if (!extent->compressed) { |
| 1908 | qemu_iovec_destroy(&local_qiov); |
| 1909 | } |
| 1910 | return ret; |
| 1911 | } |
| 1912 | |
| 1913 | static int coroutine_fn GRAPH_RDLOCK |
| 1914 | vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, |
| 1915 | int64_t offset_in_cluster, QEMUIOVector *qiov, int bytes) |
| 1916 | { |
| 1917 | int ret; |
| 1918 | int cluster_bytes, buf_bytes; |
| 1919 | uint8_t *cluster_buf, *compressed_data; |
| 1920 | uint8_t *uncomp_buf; |
| 1921 | uint32_t data_len; |
| 1922 | VmdkGrainMarker *marker; |
| 1923 | uLongf buf_len; |
| 1924 | |
| 1925 | |
| 1926 | if (!extent->compressed) { |
| 1927 | BLKDBG_CO_EVENT(extent->file, BLKDBG_READ_AIO); |
| 1928 | ret = bdrv_co_preadv(extent->file, |
| 1929 | cluster_offset + offset_in_cluster, bytes, |
| 1930 | qiov, 0); |
| 1931 | if (ret < 0) { |
| 1932 | return ret; |
| 1933 | } |
| 1934 | return 0; |
| 1935 | } |
| 1936 | cluster_bytes = extent->cluster_sectors * 512; |
| 1937 | /* Read two clusters in case GrainMarker + compressed data > one cluster */ |
| 1938 | buf_bytes = cluster_bytes * 2; |
| 1939 | cluster_buf = g_malloc(buf_bytes); |
| 1940 | uncomp_buf = g_malloc(cluster_bytes); |
| 1941 | BLKDBG_CO_EVENT(extent->file, BLKDBG_READ_COMPRESSED); |
| 1942 | ret = bdrv_co_pread(extent->file, cluster_offset, buf_bytes, cluster_buf, |
| 1943 | 0); |
| 1944 | if (ret < 0) { |
| 1945 | goto out; |
| 1946 | } |
| 1947 | compressed_data = cluster_buf; |
| 1948 | buf_len = cluster_bytes; |
| 1949 | data_len = cluster_bytes; |
| 1950 | if (extent->has_marker) { |
| 1951 | marker = (VmdkGrainMarker *)cluster_buf; |
| 1952 | compressed_data = marker->data; |
| 1953 | data_len = le32_to_cpu(marker->size); |
| 1954 | if (!data_len || data_len > buf_bytes - sizeof(VmdkGrainMarker)) { |
| 1955 | ret = -EINVAL; |
| 1956 | goto out; |
| 1957 | } |
| 1958 | } |
| 1959 | ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); |
| 1960 | if (ret != Z_OK) { |
| 1961 | ret = -EINVAL; |
| 1962 | goto out; |
| 1963 | |
| 1964 | } |
| 1965 | if (offset_in_cluster < 0 || |
| 1966 | offset_in_cluster + bytes > buf_len) { |
| 1967 | ret = -EINVAL; |
| 1968 | goto out; |
| 1969 | } |
| 1970 | qemu_iovec_from_buf(qiov, 0, uncomp_buf + offset_in_cluster, bytes); |
| 1971 | ret = 0; |
| 1972 | |
| 1973 | out: |
| 1974 | g_free(uncomp_buf); |
| 1975 | g_free(cluster_buf); |
| 1976 | return ret; |
| 1977 | } |
| 1978 | |
| 1979 | static int coroutine_fn GRAPH_RDLOCK |
| 1980 | vmdk_co_preadv(BlockDriverState *bs, int64_t offset, int64_t bytes, |
| 1981 | QEMUIOVector *qiov, BdrvRequestFlags flags) |
| 1982 | { |
| 1983 | BDRVVmdkState *s = bs->opaque; |
| 1984 | int ret; |
| 1985 | uint64_t n_bytes, offset_in_cluster; |
| 1986 | VmdkExtent *extent = NULL; |
| 1987 | QEMUIOVector local_qiov; |
| 1988 | uint64_t cluster_offset; |
| 1989 | uint64_t bytes_done = 0; |
| 1990 | |
| 1991 | qemu_iovec_init(&local_qiov, qiov->niov); |
| 1992 | qemu_co_mutex_lock(&s->lock); |
| 1993 | |
| 1994 | while (bytes > 0) { |
| 1995 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); |
| 1996 | if (!extent) { |
| 1997 | ret = -EIO; |
| 1998 | goto fail; |
| 1999 | } |
| 2000 | ret = get_cluster_offset(bs, extent, NULL, |
| 2001 | offset, false, &cluster_offset, 0, 0); |
| 2002 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
| 2003 | |
| 2004 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE |
| 2005 | - offset_in_cluster); |
| 2006 | |
| 2007 | if (ret != VMDK_OK) { |
| 2008 | /* if not allocated, try to read from parent image, if exist */ |
| 2009 | if (bs->backing && ret != VMDK_ZEROED) { |
| 2010 | if (!vmdk_is_cid_valid(bs)) { |
| 2011 | ret = -EINVAL; |
| 2012 | goto fail; |
| 2013 | } |
| 2014 | |
| 2015 | qemu_iovec_reset(&local_qiov); |
| 2016 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); |
| 2017 | |
| 2018 | /* qcow2 emits this on bs->file instead of bs->backing */ |
| 2019 | BLKDBG_CO_EVENT(bs->file, BLKDBG_READ_BACKING_AIO); |
| 2020 | ret = bdrv_co_preadv(bs->backing, offset, n_bytes, |
| 2021 | &local_qiov, 0); |
| 2022 | if (ret < 0) { |
| 2023 | goto fail; |
| 2024 | } |
| 2025 | } else { |
| 2026 | qemu_iovec_memset(qiov, bytes_done, 0, n_bytes); |
| 2027 | } |
| 2028 | } else { |
| 2029 | qemu_iovec_reset(&local_qiov); |
| 2030 | qemu_iovec_concat(&local_qiov, qiov, bytes_done, n_bytes); |
| 2031 | |
| 2032 | ret = vmdk_read_extent(extent, cluster_offset, offset_in_cluster, |
| 2033 | &local_qiov, n_bytes); |
| 2034 | if (ret) { |
| 2035 | goto fail; |
| 2036 | } |
| 2037 | } |
| 2038 | bytes -= n_bytes; |
| 2039 | offset += n_bytes; |
| 2040 | bytes_done += n_bytes; |
| 2041 | } |
| 2042 | |
| 2043 | ret = 0; |
| 2044 | fail: |
| 2045 | qemu_co_mutex_unlock(&s->lock); |
| 2046 | qemu_iovec_destroy(&local_qiov); |
| 2047 | |
| 2048 | return ret; |
| 2049 | } |
| 2050 | |
| 2051 | /** |
| 2052 | * vmdk_write: |
| 2053 | * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature |
| 2054 | * if possible, otherwise return -ENOTSUP. |
| 2055 | * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try |
| 2056 | * with each cluster. By dry run we can find if the zero write |
| 2057 | * is possible without modifying image data. |
| 2058 | * |
| 2059 | * Returns: error code with 0 for success. |
| 2060 | */ |
| 2061 | static int coroutine_fn GRAPH_RDLOCK |
| 2062 | vmdk_pwritev(BlockDriverState *bs, uint64_t offset, uint64_t bytes, |
| 2063 | QEMUIOVector *qiov, bool zeroed, bool zero_dry_run) |
| 2064 | { |
| 2065 | BDRVVmdkState *s = bs->opaque; |
| 2066 | VmdkExtent *extent = NULL; |
| 2067 | int ret; |
| 2068 | int64_t offset_in_cluster, n_bytes; |
| 2069 | uint64_t cluster_offset; |
| 2070 | uint64_t bytes_done = 0; |
| 2071 | VmdkMetaData m_data; |
| 2072 | |
| 2073 | if (DIV_ROUND_UP(offset, BDRV_SECTOR_SIZE) > bs->total_sectors) { |
| 2074 | error_report("Wrong offset: offset=0x%" PRIx64 |
| 2075 | " total_sectors=0x%" PRIx64, |
| 2076 | offset, bs->total_sectors); |
| 2077 | return -EIO; |
| 2078 | } |
| 2079 | |
| 2080 | while (bytes > 0) { |
| 2081 | extent = find_extent(s, offset >> BDRV_SECTOR_BITS, extent); |
| 2082 | if (!extent) { |
| 2083 | return -EIO; |
| 2084 | } |
| 2085 | if (extent->sesparse) { |
| 2086 | return -ENOTSUP; |
| 2087 | } |
| 2088 | offset_in_cluster = vmdk_find_offset_in_cluster(extent, offset); |
| 2089 | n_bytes = MIN(bytes, extent->cluster_sectors * BDRV_SECTOR_SIZE |
| 2090 | - offset_in_cluster); |
| 2091 | |
| 2092 | ret = get_cluster_offset(bs, extent, &m_data, offset, |
| 2093 | !(extent->compressed || zeroed), |
| 2094 | &cluster_offset, offset_in_cluster, |
| 2095 | offset_in_cluster + n_bytes); |
| 2096 | if (extent->compressed) { |
| 2097 | if (ret == VMDK_OK) { |
| 2098 | /* Refuse write to allocated cluster for streamOptimized */ |
| 2099 | error_report("Could not write to allocated cluster" |
| 2100 | " for streamOptimized"); |
| 2101 | return -EIO; |
| 2102 | } else if (!zeroed) { |
| 2103 | /* allocate */ |
| 2104 | ret = get_cluster_offset(bs, extent, &m_data, offset, |
| 2105 | true, &cluster_offset, 0, 0); |
| 2106 | } |
| 2107 | } |
| 2108 | if (ret == VMDK_ERROR) { |
| 2109 | return -EINVAL; |
| 2110 | } |
| 2111 | if (zeroed) { |
| 2112 | /* Do zeroed write, buf is ignored */ |
| 2113 | if (extent->has_zero_grain && |
| 2114 | offset_in_cluster == 0 && |
| 2115 | n_bytes >= extent->cluster_sectors * BDRV_SECTOR_SIZE) { |
| 2116 | n_bytes = extent->cluster_sectors * BDRV_SECTOR_SIZE; |
| 2117 | if (!zero_dry_run && ret != VMDK_ZEROED) { |
| 2118 | /* update L2 tables */ |
| 2119 | if (vmdk_L2update(extent, &m_data, VMDK_GTE_ZEROED) |
| 2120 | != VMDK_OK) { |
| 2121 | return -EIO; |
| 2122 | } |
| 2123 | } |
| 2124 | } else { |
| 2125 | return -ENOTSUP; |
| 2126 | } |
| 2127 | } else { |
| 2128 | ret = vmdk_write_extent(extent, cluster_offset, offset_in_cluster, |
| 2129 | qiov, bytes_done, n_bytes, offset); |
| 2130 | if (ret) { |
| 2131 | return ret; |
| 2132 | } |
| 2133 | if (m_data.new_allocation) { |
| 2134 | /* update L2 tables */ |
| 2135 | if (vmdk_L2update(extent, &m_data, |
| 2136 | cluster_offset >> BDRV_SECTOR_BITS) |
| 2137 | != VMDK_OK) { |
| 2138 | return -EIO; |
| 2139 | } |
| 2140 | } |
| 2141 | } |
| 2142 | bytes -= n_bytes; |
| 2143 | offset += n_bytes; |
| 2144 | bytes_done += n_bytes; |
| 2145 | |
| 2146 | /* update CID on the first write every time the virtual disk is |
| 2147 | * opened */ |
| 2148 | if (!s->cid_updated) { |
| 2149 | ret = vmdk_write_cid(bs, g_random_int()); |
| 2150 | if (ret < 0) { |
| 2151 | return ret; |
| 2152 | } |
| 2153 | s->cid_updated = true; |
| 2154 | } |
| 2155 | } |
| 2156 | return 0; |
| 2157 | } |
| 2158 | |
| 2159 | static int coroutine_fn GRAPH_RDLOCK |
| 2160 | vmdk_co_pwritev(BlockDriverState *bs, int64_t offset, int64_t bytes, |
| 2161 | QEMUIOVector *qiov, BdrvRequestFlags flags) |
| 2162 | { |
| 2163 | int ret; |
| 2164 | BDRVVmdkState *s = bs->opaque; |
| 2165 | qemu_co_mutex_lock(&s->lock); |
| 2166 | ret = vmdk_pwritev(bs, offset, bytes, qiov, false, false); |
| 2167 | qemu_co_mutex_unlock(&s->lock); |
| 2168 | return ret; |
| 2169 | } |
| 2170 | |
| 2171 | static int coroutine_fn GRAPH_RDLOCK |
| 2172 | vmdk_co_pwritev_compressed(BlockDriverState *bs, int64_t offset, int64_t bytes, |
| 2173 | QEMUIOVector *qiov) |
| 2174 | { |
| 2175 | if (bytes == 0) { |
| 2176 | /* The caller will write bytes 0 to signal EOF. |
| 2177 | * When receive it, we align EOF to a sector boundary. */ |
| 2178 | BDRVVmdkState *s = bs->opaque; |
| 2179 | int i, ret; |
| 2180 | int64_t length; |
| 2181 | |
| 2182 | for (i = 0; i < s->num_extents; i++) { |
| 2183 | length = bdrv_co_getlength(s->extents[i].file->bs); |
| 2184 | if (length < 0) { |
| 2185 | return length; |
| 2186 | } |
| 2187 | length = QEMU_ALIGN_UP(length, BDRV_SECTOR_SIZE); |
| 2188 | ret = bdrv_co_truncate(s->extents[i].file, length, false, |
| 2189 | PREALLOC_MODE_OFF, 0, NULL); |
| 2190 | if (ret < 0) { |
| 2191 | return ret; |
| 2192 | } |
| 2193 | } |
| 2194 | return 0; |
| 2195 | } |
| 2196 | return vmdk_co_pwritev(bs, offset, bytes, qiov, 0); |
| 2197 | } |
| 2198 | |
| 2199 | static int coroutine_fn GRAPH_RDLOCK |
| 2200 | vmdk_co_pwrite_zeroes(BlockDriverState *bs, int64_t offset, int64_t bytes, |
| 2201 | BdrvRequestFlags flags) |
| 2202 | { |
| 2203 | int ret; |
| 2204 | BDRVVmdkState *s = bs->opaque; |
| 2205 | |
| 2206 | qemu_co_mutex_lock(&s->lock); |
| 2207 | /* write zeroes could fail if sectors not aligned to cluster, test it with |
| 2208 | * dry_run == true before really updating image */ |
| 2209 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, true); |
| 2210 | if (!ret) { |
| 2211 | ret = vmdk_pwritev(bs, offset, bytes, NULL, true, false); |
| 2212 | } |
| 2213 | qemu_co_mutex_unlock(&s->lock); |
| 2214 | return ret; |
| 2215 | } |
| 2216 | |
| 2217 | static int coroutine_fn GRAPH_UNLOCKED |
| 2218 | vmdk_init_extent(BlockBackend *blk, int64_t filesize, bool flat, bool compress, |
| 2219 | bool zeroed_grain, Error **errp) |
| 2220 | { |
| 2221 | int ret, i; |
| 2222 | VMDK4Header header; |
| 2223 | uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; |
| 2224 | uint32_t *gd_buf = NULL; |
| 2225 | int gd_buf_size; |
| 2226 | |
| 2227 | if (flat) { |
| 2228 | ret = blk_co_truncate(blk, filesize, false, PREALLOC_MODE_OFF, 0, errp); |
| 2229 | goto exit; |
| 2230 | } |
| 2231 | magic = cpu_to_be32(VMDK4_MAGIC); |
| 2232 | memset(&header, 0, sizeof(header)); |
| 2233 | if (compress) { |
| 2234 | header.version = 3; |
| 2235 | } else if (zeroed_grain) { |
| 2236 | header.version = 2; |
| 2237 | } else { |
| 2238 | header.version = 1; |
| 2239 | } |
| 2240 | header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT |
| 2241 | | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) |
| 2242 | | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); |
| 2243 | header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; |
| 2244 | header.capacity = filesize / BDRV_SECTOR_SIZE; |
| 2245 | header.granularity = 128; |
| 2246 | header.num_gtes_per_gt = BDRV_SECTOR_SIZE; |
| 2247 | |
| 2248 | grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); |
| 2249 | gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), |
| 2250 | BDRV_SECTOR_SIZE); |
| 2251 | gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); |
| 2252 | gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); |
| 2253 | |
| 2254 | header.desc_offset = 1; |
| 2255 | header.desc_size = 20; |
| 2256 | header.rgd_offset = header.desc_offset + header.desc_size; |
| 2257 | header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); |
| 2258 | header.grain_offset = |
| 2259 | ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), |
| 2260 | header.granularity); |
| 2261 | /* swap endianness for all header fields */ |
| 2262 | header.version = cpu_to_le32(header.version); |
| 2263 | header.flags = cpu_to_le32(header.flags); |
| 2264 | header.capacity = cpu_to_le64(header.capacity); |
| 2265 | header.granularity = cpu_to_le64(header.granularity); |
| 2266 | header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); |
| 2267 | header.desc_offset = cpu_to_le64(header.desc_offset); |
| 2268 | header.desc_size = cpu_to_le64(header.desc_size); |
| 2269 | header.rgd_offset = cpu_to_le64(header.rgd_offset); |
| 2270 | header.gd_offset = cpu_to_le64(header.gd_offset); |
| 2271 | header.grain_offset = cpu_to_le64(header.grain_offset); |
| 2272 | header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); |
| 2273 | |
| 2274 | header.check_bytes[0] = 0xa; |
| 2275 | header.check_bytes[1] = 0x20; |
| 2276 | header.check_bytes[2] = 0xd; |
| 2277 | header.check_bytes[3] = 0xa; |
| 2278 | |
| 2279 | /* write all the data */ |
| 2280 | ret = blk_co_pwrite(blk, 0, sizeof(magic), &magic, 0); |
| 2281 | if (ret < 0) { |
| 2282 | error_setg_errno(errp, -ret, "failed to write VMDK magic"); |
| 2283 | goto exit; |
| 2284 | } |
| 2285 | ret = blk_co_pwrite(blk, sizeof(magic), sizeof(header), &header, 0); |
| 2286 | if (ret < 0) { |
| 2287 | error_setg_errno(errp, -ret, "failed to write VMDK header"); |
| 2288 | goto exit; |
| 2289 | } |
| 2290 | |
| 2291 | ret = blk_co_truncate(blk, le64_to_cpu(header.grain_offset) << 9, false, |
| 2292 | PREALLOC_MODE_OFF, 0, errp); |
| 2293 | if (ret < 0) { |
| 2294 | goto exit; |
| 2295 | } |
| 2296 | |
| 2297 | /* write grain directory */ |
| 2298 | gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; |
| 2299 | gd_buf = g_malloc0(gd_buf_size); |
| 2300 | for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; |
| 2301 | i < gt_count; i++, tmp += gt_size) { |
| 2302 | gd_buf[i] = cpu_to_le32(tmp); |
| 2303 | } |
| 2304 | ret = blk_co_pwrite(blk, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, |
| 2305 | gd_buf_size, gd_buf, 0); |
| 2306 | if (ret < 0) { |
| 2307 | error_setg_errno(errp, -ret, "failed to write VMDK grain directory"); |
| 2308 | goto exit; |
| 2309 | } |
| 2310 | |
| 2311 | /* write backup grain directory */ |
| 2312 | for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; |
| 2313 | i < gt_count; i++, tmp += gt_size) { |
| 2314 | gd_buf[i] = cpu_to_le32(tmp); |
| 2315 | } |
| 2316 | ret = blk_co_pwrite(blk, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, |
| 2317 | gd_buf_size, gd_buf, 0); |
| 2318 | if (ret < 0) { |
| 2319 | error_setg_errno(errp, -ret, |
| 2320 | "failed to write VMDK backup grain directory"); |
| 2321 | } |
| 2322 | |
| 2323 | ret = 0; |
| 2324 | exit: |
| 2325 | g_free(gd_buf); |
| 2326 | return ret; |
| 2327 | } |
| 2328 | |
| 2329 | static int coroutine_fn GRAPH_UNLOCKED |
| 2330 | vmdk_create_extent(const char *filename, int64_t filesize, bool flat, |
| 2331 | bool compress, bool zeroed_grain, BlockBackend **pbb, |
| 2332 | QemuOpts *opts, Error **errp) |
| 2333 | { |
| 2334 | int ret; |
| 2335 | BlockBackend *blk = NULL; |
| 2336 | |
| 2337 | ret = bdrv_co_create_file(filename, opts, false, errp); |
| 2338 | if (ret < 0) { |
| 2339 | goto exit; |
| 2340 | } |
| 2341 | |
| 2342 | blk = blk_co_new_open(filename, NULL, NULL, |
| 2343 | BDRV_O_RDWR | BDRV_O_RESIZE | BDRV_O_PROTOCOL, |
| 2344 | errp); |
| 2345 | if (blk == NULL) { |
| 2346 | ret = -EIO; |
| 2347 | goto exit; |
| 2348 | } |
| 2349 | |
| 2350 | blk_set_allow_write_beyond_eof(blk, true); |
| 2351 | |
| 2352 | ret = vmdk_init_extent(blk, filesize, flat, compress, zeroed_grain, errp); |
| 2353 | exit: |
| 2354 | if (blk) { |
| 2355 | if (pbb) { |
| 2356 | *pbb = blk; |
| 2357 | } else { |
| 2358 | blk_co_unref(blk); |
| 2359 | blk = NULL; |
| 2360 | } |
| 2361 | } |
| 2362 | return ret; |
| 2363 | } |
| 2364 | |
| 2365 | static int filename_decompose(const char *filename, char *path, char *prefix, |
| 2366 | char *postfix, size_t buf_len, Error **errp) |
| 2367 | { |
| 2368 | const char *p, *q; |
| 2369 | |
| 2370 | if (filename == NULL || !strlen(filename)) { |
| 2371 | error_setg(errp, "No filename provided"); |
| 2372 | return VMDK_ERROR; |
| 2373 | } |
| 2374 | p = strrchr(filename, '/'); |
| 2375 | if (p == NULL) { |
| 2376 | p = strrchr(filename, '\\'); |
| 2377 | } |
| 2378 | if (p == NULL) { |
| 2379 | p = strrchr(filename, ':'); |
| 2380 | } |
| 2381 | if (p != NULL) { |
| 2382 | p++; |
| 2383 | if (p - filename >= buf_len) { |
| 2384 | return VMDK_ERROR; |
| 2385 | } |
| 2386 | pstrcpy(path, p - filename + 1, filename); |
| 2387 | } else { |
| 2388 | p = filename; |
| 2389 | path[0] = '\0'; |
| 2390 | } |
| 2391 | q = strrchr(p, '.'); |
| 2392 | if (q == NULL) { |
| 2393 | pstrcpy(prefix, buf_len, p); |
| 2394 | postfix[0] = '\0'; |
| 2395 | } else { |
| 2396 | if (q - p >= buf_len) { |
| 2397 | return VMDK_ERROR; |
| 2398 | } |
| 2399 | pstrcpy(prefix, q - p + 1, p); |
| 2400 | pstrcpy(postfix, buf_len, q); |
| 2401 | } |
| 2402 | return VMDK_OK; |
| 2403 | } |
| 2404 | |
| 2405 | /* |
| 2406 | * idx == 0: get or create the descriptor file (also the image file if in a |
| 2407 | * non-split format. |
| 2408 | * idx >= 1: get the n-th extent if in a split subformat |
| 2409 | */ |
| 2410 | typedef BlockBackend * coroutine_fn GRAPH_UNLOCKED_PTR |
| 2411 | (*vmdk_create_extent_fn)(int64_t size, int idx, bool flat, bool split, |
| 2412 | bool compress, bool zeroed_grain, void *opaque, |
| 2413 | Error **errp); |
| 2414 | |
| 2415 | static void vmdk_desc_add_extent(GString *desc, |
| 2416 | const char *extent_line_fmt, |
| 2417 | int64_t size, const char *filename) |
| 2418 | { |
| 2419 | char *basename = g_path_get_basename(filename); |
| 2420 | |
| 2421 | g_string_append_printf(desc, extent_line_fmt, |
| 2422 | DIV_ROUND_UP(size, BDRV_SECTOR_SIZE), basename); |
| 2423 | g_free(basename); |
| 2424 | } |
| 2425 | |
| 2426 | static int coroutine_fn GRAPH_UNLOCKED |
| 2427 | vmdk_co_do_create(int64_t size, |
| 2428 | BlockdevVmdkSubformat subformat, |
| 2429 | BlockdevVmdkAdapterType adapter_type, |
| 2430 | const char *backing_file, |
| 2431 | const char *hw_version, |
| 2432 | const char *toolsversion, |
| 2433 | bool compat6, |
| 2434 | bool zeroed_grain, |
| 2435 | vmdk_create_extent_fn extent_fn, |
| 2436 | void *opaque, |
| 2437 | Error **errp) |
| 2438 | { |
| 2439 | int extent_idx; |
| 2440 | BlockBackend *blk = NULL; |
| 2441 | BlockBackend *extent_blk; |
| 2442 | Error *local_err = NULL; |
| 2443 | char *desc = NULL; |
| 2444 | int ret = 0; |
| 2445 | bool flat, split, compress; |
| 2446 | GString *ext_desc_lines; |
| 2447 | const int64_t split_size = 0x80000000; /* VMDK has constant split size */ |
| 2448 | int64_t extent_size; |
| 2449 | int64_t created_size = 0; |
| 2450 | const char *extent_line_fmt; |
| 2451 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
| 2452 | uint32_t parent_cid = 0xffffffff; |
| 2453 | uint32_t number_heads = 16; |
| 2454 | uint32_t desc_offset = 0, desc_len; |
| 2455 | const char desc_template[] = |
| 2456 | "# Disk DescriptorFile\n" |
| 2457 | "version=1\n" |
| 2458 | "CID=%" PRIx32 "\n" |
| 2459 | "parentCID=%" PRIx32 "\n" |
| 2460 | "createType=\"%s\"\n" |
| 2461 | "%s" |
| 2462 | "\n" |
| 2463 | "# Extent description\n" |
| 2464 | "%s" |
| 2465 | "\n" |
| 2466 | "# The Disk Data Base\n" |
| 2467 | "#DDB\n" |
| 2468 | "\n" |
| 2469 | "ddb.virtualHWVersion = \"%s\"\n" |
| 2470 | "ddb.geometry.cylinders = \"%" PRId64 "\"\n" |
| 2471 | "ddb.geometry.heads = \"%" PRIu32 "\"\n" |
| 2472 | "ddb.geometry.sectors = \"63\"\n" |
| 2473 | "ddb.adapterType = \"%s\"\n" |
| 2474 | "ddb.toolsVersion = \"%s\"\n"; |
| 2475 | |
| 2476 | ext_desc_lines = g_string_new(NULL); |
| 2477 | |
| 2478 | /* Read out options */ |
| 2479 | if (compat6) { |
| 2480 | if (hw_version) { |
| 2481 | error_setg(errp, |
| 2482 | "compat6 cannot be enabled with hwversion set"); |
| 2483 | ret = -EINVAL; |
| 2484 | goto exit; |
| 2485 | } |
| 2486 | hw_version = "6"; |
| 2487 | } |
| 2488 | if (!hw_version) { |
| 2489 | hw_version = "4"; |
| 2490 | } |
| 2491 | if (!toolsversion) { |
| 2492 | toolsversion = "2147483647"; |
| 2493 | } |
| 2494 | |
| 2495 | if (adapter_type != BLOCKDEV_VMDK_ADAPTER_TYPE_IDE) { |
| 2496 | /* that's the number of heads with which vmware operates when |
| 2497 | creating, exporting, etc. vmdk files with a non-ide adapter type */ |
| 2498 | number_heads = 255; |
| 2499 | } |
| 2500 | split = (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT) || |
| 2501 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTSPARSE); |
| 2502 | flat = (subformat == BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICFLAT) || |
| 2503 | (subformat == BLOCKDEV_VMDK_SUBFORMAT_TWOGBMAXEXTENTFLAT); |
| 2504 | compress = subformat == BLOCKDEV_VMDK_SUBFORMAT_STREAMOPTIMIZED; |
| 2505 | |
| 2506 | if (flat) { |
| 2507 | extent_line_fmt = "RW %" PRId64 " FLAT \"%s\" 0\n"; |
| 2508 | } else { |
| 2509 | extent_line_fmt = "RW %" PRId64 " SPARSE \"%s\"\n"; |
| 2510 | } |
| 2511 | if (flat && backing_file) { |
| 2512 | error_setg(errp, "Flat image can't have backing file"); |
| 2513 | ret = -ENOTSUP; |
| 2514 | goto exit; |
| 2515 | } |
| 2516 | if (flat && zeroed_grain) { |
| 2517 | error_setg(errp, "Flat image can't enable zeroed grain"); |
| 2518 | ret = -ENOTSUP; |
| 2519 | goto exit; |
| 2520 | } |
| 2521 | |
| 2522 | /* Create extents */ |
| 2523 | if (split) { |
| 2524 | extent_size = split_size; |
| 2525 | } else { |
| 2526 | extent_size = size; |
| 2527 | } |
| 2528 | if (!split && !flat) { |
| 2529 | created_size = extent_size; |
| 2530 | } else { |
| 2531 | created_size = 0; |
| 2532 | } |
| 2533 | /* Get the descriptor file BDS */ |
| 2534 | blk = extent_fn(created_size, 0, flat, split, compress, zeroed_grain, |
| 2535 | opaque, errp); |
| 2536 | if (!blk) { |
| 2537 | ret = -EIO; |
| 2538 | goto exit; |
| 2539 | } |
| 2540 | if (!split && !flat) { |
| 2541 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, created_size, |
| 2542 | blk_bs(blk)->filename); |
| 2543 | } |
| 2544 | |
| 2545 | if (backing_file) { |
| 2546 | BlockBackend *backing; |
| 2547 | char *full_backing = |
| 2548 | bdrv_get_full_backing_filename_from_filename(blk_bs(blk)->filename, |
| 2549 | backing_file, |
| 2550 | &local_err); |
| 2551 | if (local_err) { |
| 2552 | error_propagate(errp, local_err); |
| 2553 | ret = -ENOENT; |
| 2554 | goto exit; |
| 2555 | } |
| 2556 | assert(full_backing); |
| 2557 | |
| 2558 | backing = blk_co_new_open(full_backing, NULL, NULL, |
| 2559 | BDRV_O_NO_BACKING, errp); |
| 2560 | g_free(full_backing); |
| 2561 | if (backing == NULL) { |
| 2562 | ret = -EIO; |
| 2563 | goto exit; |
| 2564 | } |
| 2565 | if (strcmp(blk_bs(backing)->drv->format_name, "vmdk")) { |
| 2566 | error_setg(errp, "Invalid backing file format: %s. Must be vmdk", |
| 2567 | blk_bs(backing)->drv->format_name); |
| 2568 | blk_co_unref(backing); |
| 2569 | ret = -EINVAL; |
| 2570 | goto exit; |
| 2571 | } |
| 2572 | |
| 2573 | bdrv_graph_co_rdlock(); |
| 2574 | ret = vmdk_read_cid(blk_bs(backing), 0, &parent_cid); |
| 2575 | bdrv_graph_co_rdunlock(); |
| 2576 | blk_co_unref(backing); |
| 2577 | if (ret) { |
| 2578 | error_setg(errp, "Failed to read parent CID"); |
| 2579 | goto exit; |
| 2580 | } |
| 2581 | snprintf(parent_desc_line, BUF_SIZE, |
| 2582 | "parentFileNameHint=\"%s\"", backing_file); |
| 2583 | } |
| 2584 | extent_idx = 1; |
| 2585 | while (created_size < size) { |
| 2586 | int64_t cur_size = MIN(size - created_size, extent_size); |
| 2587 | extent_blk = extent_fn(cur_size, extent_idx, flat, split, compress, |
| 2588 | zeroed_grain, opaque, errp); |
| 2589 | if (!extent_blk) { |
| 2590 | ret = -EINVAL; |
| 2591 | goto exit; |
| 2592 | } |
| 2593 | vmdk_desc_add_extent(ext_desc_lines, extent_line_fmt, cur_size, |
| 2594 | blk_bs(extent_blk)->filename); |
| 2595 | created_size += cur_size; |
| 2596 | extent_idx++; |
| 2597 | blk_co_unref(extent_blk); |
| 2598 | } |
| 2599 | |
| 2600 | /* Check whether we got excess extents */ |
| 2601 | extent_blk = extent_fn(-1, extent_idx, flat, split, compress, zeroed_grain, |
| 2602 | opaque, NULL); |
| 2603 | if (extent_blk) { |
| 2604 | blk_co_unref(extent_blk); |
| 2605 | error_setg(errp, "List of extents contains unused extents"); |
| 2606 | ret = -EINVAL; |
| 2607 | goto exit; |
| 2608 | } |
| 2609 | |
| 2610 | /* generate descriptor file */ |
| 2611 | desc = g_strdup_printf(desc_template, |
| 2612 | g_random_int(), |
| 2613 | parent_cid, |
| 2614 | BlockdevVmdkSubformat_str(subformat), |
| 2615 | parent_desc_line, |
| 2616 | ext_desc_lines->str, |
| 2617 | hw_version, |
| 2618 | size / |
| 2619 | (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), |
| 2620 | number_heads, |
| 2621 | BlockdevVmdkAdapterType_str(adapter_type), |
| 2622 | toolsversion); |
| 2623 | desc_len = strlen(desc); |
| 2624 | /* the descriptor offset = 0x200 */ |
| 2625 | if (!split && !flat) { |
| 2626 | desc_offset = 0x200; |
| 2627 | } |
| 2628 | |
| 2629 | ret = blk_co_pwrite(blk, desc_offset, desc_len, desc, 0); |
| 2630 | if (ret < 0) { |
| 2631 | error_setg_errno(errp, -ret, "Could not write description"); |
| 2632 | goto exit; |
| 2633 | } |
| 2634 | /* bdrv_pwrite write padding zeros to align to sector, we don't need that |
| 2635 | * for description file */ |
| 2636 | if (desc_offset == 0) { |
| 2637 | ret = blk_co_truncate(blk, desc_len, false, PREALLOC_MODE_OFF, 0, errp); |
| 2638 | if (ret < 0) { |
| 2639 | goto exit; |
| 2640 | } |
| 2641 | } |
| 2642 | ret = 0; |
| 2643 | exit: |
| 2644 | if (blk) { |
| 2645 | blk_co_unref(blk); |
| 2646 | } |
| 2647 | g_free(desc); |
| 2648 | g_free(parent_desc_line); |
| 2649 | g_string_free(ext_desc_lines, true); |
| 2650 | return ret; |
| 2651 | } |
| 2652 | |
| 2653 | typedef struct { |
| 2654 | char *path; |
| 2655 | char *prefix; |
| 2656 | char *postfix; |
| 2657 | QemuOpts *opts; |
| 2658 | } VMDKCreateOptsData; |
| 2659 | |
| 2660 | static BlockBackend * coroutine_fn GRAPH_UNLOCKED |
| 2661 | vmdk_co_create_opts_cb(int64_t size, int idx, bool flat, bool split, |
| 2662 | bool compress, bool zeroed_grain, void *opaque, |
| 2663 | Error **errp) |
| 2664 | { |
| 2665 | BlockBackend *blk = NULL; |
| 2666 | BlockDriverState *bs = NULL; |
| 2667 | VMDKCreateOptsData *data = opaque; |
| 2668 | char *ext_filename = NULL; |
| 2669 | char *rel_filename = NULL; |
| 2670 | |
| 2671 | /* We're done, don't create excess extents. */ |
| 2672 | if (size == -1) { |
| 2673 | assert(errp == NULL); |
| 2674 | return NULL; |
| 2675 | } |
| 2676 | |
| 2677 | if (idx == 0) { |
| 2678 | rel_filename = g_strdup_printf("%s%s", data->prefix, data->postfix); |
| 2679 | } else if (split) { |
| 2680 | rel_filename = g_strdup_printf("%s-%c%03d%s", |
| 2681 | data->prefix, |
| 2682 | flat ? 'f' : 's', idx, data->postfix); |
| 2683 | } else { |
| 2684 | assert(idx == 1); |
| 2685 | rel_filename = g_strdup_printf("%s-flat%s", data->prefix, data->postfix); |
| 2686 | } |
| 2687 | |
| 2688 | ext_filename = g_strdup_printf("%s%s", data->path, rel_filename); |
| 2689 | g_free(rel_filename); |
| 2690 | |
| 2691 | if (vmdk_create_extent(ext_filename, size, |
| 2692 | flat, compress, zeroed_grain, &blk, data->opts, |
| 2693 | errp)) { |
| 2694 | goto exit; |
| 2695 | } |
| 2696 | bdrv_co_unref(bs); |
| 2697 | exit: |
| 2698 | g_free(ext_filename); |
| 2699 | return blk; |
| 2700 | } |
| 2701 | |
| 2702 | static int coroutine_fn GRAPH_UNLOCKED |
| 2703 | vmdk_co_create_opts(BlockDriver *drv, const char *filename, |
| 2704 | QemuOpts *opts, Error **errp) |
| 2705 | { |
| 2706 | Error *local_err = NULL; |
| 2707 | char *desc = NULL; |
| 2708 | int64_t total_size = 0; |
| 2709 | char *adapter_type = NULL; |
| 2710 | BlockdevVmdkAdapterType adapter_type_enum; |
| 2711 | char *backing_file = NULL; |
| 2712 | char *hw_version = NULL; |
| 2713 | char *toolsversion = NULL; |
| 2714 | char *fmt = NULL; |
| 2715 | BlockdevVmdkSubformat subformat; |
| 2716 | int ret = 0; |
| 2717 | char *path = g_malloc0(PATH_MAX); |
| 2718 | char *prefix = g_malloc0(PATH_MAX); |
| 2719 | char *postfix = g_malloc0(PATH_MAX); |
| 2720 | char *desc_line = g_malloc0(BUF_SIZE); |
| 2721 | char *ext_filename = g_malloc0(PATH_MAX); |
| 2722 | char *desc_filename = g_malloc0(PATH_MAX); |
| 2723 | char *parent_desc_line = g_malloc0(BUF_SIZE); |
| 2724 | bool zeroed_grain; |
| 2725 | bool compat6; |
| 2726 | VMDKCreateOptsData data; |
| 2727 | char *backing_fmt = NULL; |
| 2728 | |
| 2729 | backing_fmt = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FMT); |
| 2730 | if (backing_fmt && strcmp(backing_fmt, "vmdk") != 0) { |
| 2731 | error_setg(errp, "backing_file must be a vmdk image"); |
| 2732 | ret = -EINVAL; |
| 2733 | goto exit; |
| 2734 | } |
| 2735 | |
| 2736 | if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { |
| 2737 | ret = -EINVAL; |
| 2738 | goto exit; |
| 2739 | } |
| 2740 | /* Read out options */ |
| 2741 | total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), |
| 2742 | BDRV_SECTOR_SIZE); |
| 2743 | adapter_type = qemu_opt_get_del(opts, BLOCK_OPT_ADAPTER_TYPE); |
| 2744 | backing_file = qemu_opt_get_del(opts, BLOCK_OPT_BACKING_FILE); |
| 2745 | hw_version = qemu_opt_get_del(opts, BLOCK_OPT_HWVERSION); |
| 2746 | toolsversion = qemu_opt_get_del(opts, BLOCK_OPT_TOOLSVERSION); |
| 2747 | compat6 = qemu_opt_get_bool_del(opts, BLOCK_OPT_COMPAT6, false); |
| 2748 | if (strcmp(hw_version, "undefined") == 0) { |
| 2749 | g_free(hw_version); |
| 2750 | hw_version = NULL; |
| 2751 | } |
| 2752 | fmt = qemu_opt_get_del(opts, BLOCK_OPT_SUBFMT); |
| 2753 | zeroed_grain = qemu_opt_get_bool_del(opts, BLOCK_OPT_ZEROED_GRAIN, false); |
| 2754 | |
| 2755 | if (adapter_type) { |
| 2756 | adapter_type_enum = qapi_enum_parse(&BlockdevVmdkAdapterType_lookup, |
| 2757 | adapter_type, |
| 2758 | BLOCKDEV_VMDK_ADAPTER_TYPE_IDE, |
| 2759 | &local_err); |
| 2760 | if (local_err) { |
| 2761 | error_propagate(errp, local_err); |
| 2762 | ret = -EINVAL; |
| 2763 | goto exit; |
| 2764 | } |
| 2765 | } else { |
| 2766 | adapter_type_enum = BLOCKDEV_VMDK_ADAPTER_TYPE_IDE; |
| 2767 | } |
| 2768 | |
| 2769 | if (!fmt) { |
| 2770 | /* Default format to monolithicSparse */ |
| 2771 | subformat = BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE; |
| 2772 | } else { |
| 2773 | subformat = qapi_enum_parse(&BlockdevVmdkSubformat_lookup, |
| 2774 | fmt, |
| 2775 | BLOCKDEV_VMDK_SUBFORMAT_MONOLITHICSPARSE, |
| 2776 | &local_err); |
| 2777 | if (local_err) { |
| 2778 | error_propagate(errp, local_err); |
| 2779 | ret = -EINVAL; |
| 2780 | goto exit; |
| 2781 | } |
| 2782 | } |
| 2783 | data = (VMDKCreateOptsData){ |
| 2784 | .prefix = prefix, |
| 2785 | .postfix = postfix, |
| 2786 | .path = path, |
| 2787 | .opts = opts, |
| 2788 | }; |
| 2789 | ret = vmdk_co_do_create(total_size, subformat, adapter_type_enum, |
| 2790 | backing_file, hw_version, toolsversion, compat6, |
| 2791 | zeroed_grain, vmdk_co_create_opts_cb, &data, errp); |
| 2792 | |
| 2793 | exit: |
| 2794 | g_free(backing_fmt); |
| 2795 | g_free(adapter_type); |
| 2796 | g_free(backing_file); |
| 2797 | g_free(hw_version); |
| 2798 | g_free(toolsversion); |
| 2799 | g_free(fmt); |
| 2800 | g_free(desc); |
| 2801 | g_free(path); |
| 2802 | g_free(prefix); |
| 2803 | g_free(postfix); |
| 2804 | g_free(desc_line); |
| 2805 | g_free(ext_filename); |
| 2806 | g_free(desc_filename); |
| 2807 | g_free(parent_desc_line); |
| 2808 | return ret; |
| 2809 | } |
| 2810 | |
| 2811 | static BlockBackend * coroutine_fn GRAPH_UNLOCKED |
| 2812 | vmdk_co_create_cb(int64_t size, int idx, bool flat, bool split, bool compress, |
| 2813 | bool zeroed_grain, void *opaque, Error **errp) |
| 2814 | { |
| 2815 | int ret; |
| 2816 | BlockDriverState *bs; |
| 2817 | BlockBackend *blk; |
| 2818 | BlockdevCreateOptionsVmdk *opts = opaque; |
| 2819 | |
| 2820 | if (idx == 0) { |
| 2821 | bs = bdrv_co_open_blockdev_ref(opts->file, errp); |
| 2822 | } else { |
| 2823 | int i; |
| 2824 | BlockdevRefList *list = opts->extents; |
| 2825 | for (i = 1; i < idx; i++) { |
| 2826 | if (!list || !list->next) { |
| 2827 | error_setg(errp, "Extent [%d] not specified", i); |
| 2828 | return NULL; |
| 2829 | } |
| 2830 | list = list->next; |
| 2831 | } |
| 2832 | if (!list) { |
| 2833 | error_setg(errp, "Extent [%d] not specified", idx - 1); |
| 2834 | return NULL; |
| 2835 | } |
| 2836 | bs = bdrv_co_open_blockdev_ref(list->value, errp); |
| 2837 | } |
| 2838 | if (!bs) { |
| 2839 | return NULL; |
| 2840 | } |
| 2841 | blk = blk_co_new_with_bs(bs, |
| 2842 | BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE | |
| 2843 | BLK_PERM_RESIZE, |
| 2844 | BLK_PERM_ALL, |
| 2845 | errp); |
| 2846 | if (!blk) { |
| 2847 | return NULL; |
| 2848 | } |
| 2849 | blk_set_allow_write_beyond_eof(blk, true); |
| 2850 | bdrv_co_unref(bs); |
| 2851 | |
| 2852 | if (size != -1) { |
| 2853 | ret = vmdk_init_extent(blk, size, flat, compress, zeroed_grain, errp); |
| 2854 | if (ret) { |
| 2855 | blk_co_unref(blk); |
| 2856 | blk = NULL; |
| 2857 | } |
| 2858 | } |
| 2859 | return blk; |
| 2860 | } |
| 2861 | |
| 2862 | static int coroutine_fn GRAPH_UNLOCKED |
| 2863 | vmdk_co_create(BlockdevCreateOptions *create_options, Error **errp) |
| 2864 | { |
| 2865 | BlockdevCreateOptionsVmdk *opts; |
| 2866 | |
| 2867 | opts = &create_options->u.vmdk; |
| 2868 | |
| 2869 | /* Validate options */ |
| 2870 | if (!QEMU_IS_ALIGNED(opts->size, BDRV_SECTOR_SIZE)) { |
| 2871 | error_setg(errp, "Image size must be a multiple of 512 bytes"); |
| 2872 | return -EINVAL; |
| 2873 | } |
| 2874 | |
| 2875 | return vmdk_co_do_create(opts->size, |
| 2876 | opts->subformat, |
| 2877 | opts->adapter_type, |
| 2878 | opts->backing_file, |
| 2879 | opts->hwversion, |
| 2880 | opts->toolsversion, |
| 2881 | false, |
| 2882 | opts->zeroed_grain, |
| 2883 | vmdk_co_create_cb, |
| 2884 | opts, errp); |
| 2885 | } |
| 2886 | |
| 2887 | static void vmdk_close(BlockDriverState *bs) |
| 2888 | { |
| 2889 | BDRVVmdkState *s = bs->opaque; |
| 2890 | |
| 2891 | vmdk_free_extents(bs); |
| 2892 | g_free(s->create_type); |
| 2893 | |
| 2894 | migrate_del_blocker(&s->migration_blocker); |
| 2895 | } |
| 2896 | |
| 2897 | static int64_t coroutine_fn GRAPH_RDLOCK |
| 2898 | vmdk_co_get_allocated_file_size(BlockDriverState *bs) |
| 2899 | { |
| 2900 | int i; |
| 2901 | int64_t ret = 0; |
| 2902 | int64_t r; |
| 2903 | BDRVVmdkState *s = bs->opaque; |
| 2904 | |
| 2905 | ret = bdrv_co_get_allocated_file_size(bs->file->bs); |
| 2906 | if (ret < 0) { |
| 2907 | return ret; |
| 2908 | } |
| 2909 | for (i = 0; i < s->num_extents; i++) { |
| 2910 | if (s->extents[i].file == bs->file) { |
| 2911 | continue; |
| 2912 | } |
| 2913 | r = bdrv_co_get_allocated_file_size(s->extents[i].file->bs); |
| 2914 | if (r < 0) { |
| 2915 | return r; |
| 2916 | } |
| 2917 | ret += r; |
| 2918 | } |
| 2919 | return ret; |
| 2920 | } |
| 2921 | |
| 2922 | static int GRAPH_RDLOCK vmdk_has_zero_init(BlockDriverState *bs) |
| 2923 | { |
| 2924 | int i; |
| 2925 | BDRVVmdkState *s = bs->opaque; |
| 2926 | |
| 2927 | /* If has a flat extent and its underlying storage doesn't have zero init, |
| 2928 | * return 0. */ |
| 2929 | for (i = 0; i < s->num_extents; i++) { |
| 2930 | if (s->extents[i].flat) { |
| 2931 | if (!bdrv_has_zero_init(s->extents[i].file->bs)) { |
| 2932 | return 0; |
| 2933 | } |
| 2934 | } |
| 2935 | } |
| 2936 | return 1; |
| 2937 | } |
| 2938 | |
| 2939 | static VmdkExtentInfo * GRAPH_RDLOCK vmdk_get_extent_info(VmdkExtent *extent) |
| 2940 | { |
| 2941 | VmdkExtentInfo *info = g_new0(VmdkExtentInfo, 1); |
| 2942 | |
| 2943 | bdrv_refresh_filename(extent->file->bs); |
| 2944 | *info = (VmdkExtentInfo){ |
| 2945 | .filename = g_strdup(extent->file->bs->filename), |
| 2946 | .format = g_strdup(extent->type), |
| 2947 | .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, |
| 2948 | .compressed = extent->compressed, |
| 2949 | .has_compressed = extent->compressed, |
| 2950 | .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, |
| 2951 | .has_cluster_size = !extent->flat, |
| 2952 | }; |
| 2953 | |
| 2954 | return info; |
| 2955 | } |
| 2956 | |
| 2957 | static int coroutine_fn GRAPH_RDLOCK |
| 2958 | vmdk_co_check(BlockDriverState *bs, BdrvCheckResult *result, BdrvCheckMode fix) |
| 2959 | { |
| 2960 | BDRVVmdkState *s = bs->opaque; |
| 2961 | VmdkExtent *extent = NULL; |
| 2962 | int64_t sector_num = 0; |
| 2963 | int64_t total_sectors = bdrv_co_nb_sectors(bs); |
| 2964 | int ret; |
| 2965 | uint64_t cluster_offset; |
| 2966 | |
| 2967 | if (fix) { |
| 2968 | return -ENOTSUP; |
| 2969 | } |
| 2970 | |
| 2971 | for (;;) { |
| 2972 | if (sector_num >= total_sectors) { |
| 2973 | return 0; |
| 2974 | } |
| 2975 | extent = find_extent(s, sector_num, extent); |
| 2976 | if (!extent) { |
| 2977 | fprintf(stderr, |
| 2978 | "ERROR: could not find extent for sector %" PRId64 "\n", |
| 2979 | sector_num); |
| 2980 | ret = -EINVAL; |
| 2981 | break; |
| 2982 | } |
| 2983 | ret = get_cluster_offset(bs, extent, NULL, |
| 2984 | sector_num << BDRV_SECTOR_BITS, |
| 2985 | false, &cluster_offset, 0, 0); |
| 2986 | if (ret == VMDK_ERROR) { |
| 2987 | fprintf(stderr, |
| 2988 | "ERROR: could not get cluster_offset for sector %" |
| 2989 | PRId64 "\n", sector_num); |
| 2990 | break; |
| 2991 | } |
| 2992 | if (ret == VMDK_OK) { |
| 2993 | int64_t extent_len = bdrv_co_getlength(extent->file->bs); |
| 2994 | if (extent_len < 0) { |
| 2995 | fprintf(stderr, |
| 2996 | "ERROR: could not get extent file length for sector %" |
| 2997 | PRId64 "\n", sector_num); |
| 2998 | ret = extent_len; |
| 2999 | break; |
| 3000 | } |
| 3001 | if (cluster_offset >= extent_len) { |
| 3002 | fprintf(stderr, |
| 3003 | "ERROR: cluster offset for sector %" |
| 3004 | PRId64 " points after EOF\n", sector_num); |
| 3005 | ret = -EINVAL; |
| 3006 | break; |
| 3007 | } |
| 3008 | } |
| 3009 | sector_num += extent->cluster_sectors; |
| 3010 | } |
| 3011 | |
| 3012 | result->corruptions++; |
| 3013 | return ret; |
| 3014 | } |
| 3015 | |
| 3016 | static ImageInfoSpecific * GRAPH_RDLOCK |
| 3017 | vmdk_get_specific_info(BlockDriverState *bs, Error **errp) |
| 3018 | { |
| 3019 | int i; |
| 3020 | BDRVVmdkState *s = bs->opaque; |
| 3021 | ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); |
| 3022 | VmdkExtentInfoList **tail; |
| 3023 | |
| 3024 | *spec_info = (ImageInfoSpecific){ |
| 3025 | .type = IMAGE_INFO_SPECIFIC_KIND_VMDK, |
| 3026 | .u = { |
| 3027 | .vmdk.data = g_new0(ImageInfoSpecificVmdk, 1), |
| 3028 | }, |
| 3029 | }; |
| 3030 | |
| 3031 | *spec_info->u.vmdk.data = (ImageInfoSpecificVmdk) { |
| 3032 | .create_type = g_strdup(s->create_type), |
| 3033 | .cid = s->cid, |
| 3034 | .parent_cid = s->parent_cid, |
| 3035 | }; |
| 3036 | |
| 3037 | tail = &spec_info->u.vmdk.data->extents; |
| 3038 | for (i = 0; i < s->num_extents; i++) { |
| 3039 | QAPI_LIST_APPEND(tail, vmdk_get_extent_info(&s->extents[i])); |
| 3040 | } |
| 3041 | |
| 3042 | return spec_info; |
| 3043 | } |
| 3044 | |
| 3045 | static bool vmdk_extents_type_eq(const VmdkExtent *a, const VmdkExtent *b) |
| 3046 | { |
| 3047 | return a->flat == b->flat && |
| 3048 | a->compressed == b->compressed && |
| 3049 | (a->flat || a->cluster_sectors == b->cluster_sectors); |
| 3050 | } |
| 3051 | |
| 3052 | static int coroutine_fn |
| 3053 | vmdk_co_get_info(BlockDriverState *bs, BlockDriverInfo *bdi) |
| 3054 | { |
| 3055 | int i; |
| 3056 | BDRVVmdkState *s = bs->opaque; |
| 3057 | assert(s->num_extents); |
| 3058 | |
| 3059 | /* See if we have multiple extents but they have different cases */ |
| 3060 | for (i = 1; i < s->num_extents; i++) { |
| 3061 | if (!vmdk_extents_type_eq(&s->extents[0], &s->extents[i])) { |
| 3062 | return -ENOTSUP; |
| 3063 | } |
| 3064 | } |
| 3065 | bdi->needs_compressed_writes = s->extents[0].compressed; |
| 3066 | if (!s->extents[0].flat) { |
| 3067 | bdi->cluster_size = s->extents[0].cluster_sectors << BDRV_SECTOR_BITS; |
| 3068 | } |
| 3069 | return 0; |
| 3070 | } |
| 3071 | |
| 3072 | static void GRAPH_RDLOCK |
| 3073 | vmdk_gather_child_options(BlockDriverState *bs, QDict *target, |
| 3074 | bool backing_overridden) |
| 3075 | { |
| 3076 | /* No children but file and backing can be explicitly specified (TODO) */ |
| 3077 | qdict_put(target, "file", |
| 3078 | qobject_ref(bs->file->bs->full_open_options)); |
| 3079 | |
| 3080 | if (backing_overridden) { |
| 3081 | if (bs->backing) { |
| 3082 | qdict_put(target, "backing", |
| 3083 | qobject_ref(bs->backing->bs->full_open_options)); |
| 3084 | } else { |
| 3085 | qdict_put_null(target, "backing"); |
| 3086 | } |
| 3087 | } |
| 3088 | } |
| 3089 | |
| 3090 | static QemuOptsList vmdk_create_opts = { |
| 3091 | .name = "vmdk-create-opts", |
| 3092 | .head = QTAILQ_HEAD_INITIALIZER(vmdk_create_opts.head), |
| 3093 | .desc = { |
| 3094 | { |
| 3095 | .name = BLOCK_OPT_SIZE, |
| 3096 | .type = QEMU_OPT_SIZE, |
| 3097 | .help = "Virtual disk size" |
| 3098 | }, |
| 3099 | { |
| 3100 | .name = BLOCK_OPT_ADAPTER_TYPE, |
| 3101 | .type = QEMU_OPT_STRING, |
| 3102 | .help = "Virtual adapter type, can be one of " |
| 3103 | "ide (default), lsilogic, buslogic or legacyESX" |
| 3104 | }, |
| 3105 | { |
| 3106 | .name = BLOCK_OPT_BACKING_FILE, |
| 3107 | .type = QEMU_OPT_STRING, |
| 3108 | .help = "File name of a base image" |
| 3109 | }, |
| 3110 | { |
| 3111 | .name = BLOCK_OPT_BACKING_FMT, |
| 3112 | .type = QEMU_OPT_STRING, |
| 3113 | .help = "Must be 'vmdk' if present", |
| 3114 | }, |
| 3115 | { |
| 3116 | .name = BLOCK_OPT_COMPAT6, |
| 3117 | .type = QEMU_OPT_BOOL, |
| 3118 | .help = "VMDK version 6 image", |
| 3119 | .def_value_str = "off" |
| 3120 | }, |
| 3121 | { |
| 3122 | .name = BLOCK_OPT_HWVERSION, |
| 3123 | .type = QEMU_OPT_STRING, |
| 3124 | .help = "VMDK hardware version", |
| 3125 | .def_value_str = "undefined" |
| 3126 | }, |
| 3127 | { |
| 3128 | .name = BLOCK_OPT_TOOLSVERSION, |
| 3129 | .type = QEMU_OPT_STRING, |
| 3130 | .help = "VMware guest tools version", |
| 3131 | }, |
| 3132 | { |
| 3133 | .name = BLOCK_OPT_SUBFMT, |
| 3134 | .type = QEMU_OPT_STRING, |
| 3135 | .help = |
| 3136 | "VMDK flat extent format, can be one of " |
| 3137 | "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " |
| 3138 | }, |
| 3139 | { |
| 3140 | .name = BLOCK_OPT_ZEROED_GRAIN, |
| 3141 | .type = QEMU_OPT_BOOL, |
| 3142 | .help = "Enable efficient zero writes " |
| 3143 | "using the zeroed-grain GTE feature" |
| 3144 | }, |
| 3145 | { /* end of list */ } |
| 3146 | } |
| 3147 | }; |
| 3148 | |
| 3149 | static BlockDriver bdrv_vmdk = { |
| 3150 | .format_name = "vmdk", |
| 3151 | .instance_size = sizeof(BDRVVmdkState), |
| 3152 | .bdrv_probe = vmdk_probe, |
| 3153 | .bdrv_open = vmdk_open, |
| 3154 | .bdrv_co_check = vmdk_co_check, |
| 3155 | .bdrv_reopen_prepare = vmdk_reopen_prepare, |
| 3156 | .bdrv_reopen_commit = vmdk_reopen_commit, |
| 3157 | .bdrv_reopen_abort = vmdk_reopen_abort, |
| 3158 | .bdrv_child_perm = bdrv_default_perms, |
| 3159 | .bdrv_co_preadv = vmdk_co_preadv, |
| 3160 | .bdrv_co_pwritev = vmdk_co_pwritev, |
| 3161 | .bdrv_co_pwritev_compressed = vmdk_co_pwritev_compressed, |
| 3162 | .bdrv_co_pwrite_zeroes = vmdk_co_pwrite_zeroes, |
| 3163 | .bdrv_close = vmdk_close, |
| 3164 | .bdrv_co_create_opts = vmdk_co_create_opts, |
| 3165 | .bdrv_co_create = vmdk_co_create, |
| 3166 | .bdrv_co_block_status = vmdk_co_block_status, |
| 3167 | .bdrv_co_get_allocated_file_size = vmdk_co_get_allocated_file_size, |
| 3168 | .bdrv_has_zero_init = vmdk_has_zero_init, |
| 3169 | .bdrv_get_specific_info = vmdk_get_specific_info, |
| 3170 | .bdrv_refresh_limits = vmdk_refresh_limits, |
| 3171 | .bdrv_co_get_info = vmdk_co_get_info, |
| 3172 | .bdrv_gather_child_options = vmdk_gather_child_options, |
| 3173 | |
| 3174 | .is_format = true, |
| 3175 | .supports_backing = true, |
| 3176 | .create_opts = &vmdk_create_opts, |
| 3177 | }; |
| 3178 | |
| 3179 | static void bdrv_vmdk_init(void) |
| 3180 | { |
| 3181 | bdrv_register(&bdrv_vmdk); |
| 3182 | } |
| 3183 | |
| 3184 | block_init(bdrv_vmdk_init); |