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-common.h" 27 #include "block/block_int.h" 28 #include "qemu/module.h" 29 #include "migration/migration.h" 30 #include <zlib.h> 31 32 #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D') 33 #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V') 34 #define VMDK4_COMPRESSION_DEFLATE 1 35 #define VMDK4_FLAG_NL_DETECT (1 << 0) 36 #define VMDK4_FLAG_RGD (1 << 1) 37 /* Zeroed-grain enable bit */ 38 #define VMDK4_FLAG_ZERO_GRAIN (1 << 2) 39 #define VMDK4_FLAG_COMPRESS (1 << 16) 40 #define VMDK4_FLAG_MARKER (1 << 17) 41 #define VMDK4_GD_AT_END 0xffffffffffffffffULL 42 43 #define VMDK_GTE_ZEROED 0x1 44 45 /* VMDK internal error codes */ 46 #define VMDK_OK 0 47 #define VMDK_ERROR (-1) 48 /* Cluster not allocated */ 49 #define VMDK_UNALLOC (-2) 50 #define VMDK_ZEROED (-3) 51 52 #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain" 53 54 typedef struct { 55 uint32_t version; 56 uint32_t flags; 57 uint32_t disk_sectors; 58 uint32_t granularity; 59 uint32_t l1dir_offset; 60 uint32_t l1dir_size; 61 uint32_t file_sectors; 62 uint32_t cylinders; 63 uint32_t heads; 64 uint32_t sectors_per_track; 65 } QEMU_PACKED VMDK3Header; 66 67 typedef struct { 68 uint32_t version; 69 uint32_t flags; 70 uint64_t capacity; 71 uint64_t granularity; 72 uint64_t desc_offset; 73 uint64_t desc_size; 74 /* Number of GrainTableEntries per GrainTable */ 75 uint32_t num_gtes_per_gt; 76 uint64_t rgd_offset; 77 uint64_t gd_offset; 78 uint64_t grain_offset; 79 char filler[1]; 80 char check_bytes[4]; 81 uint16_t compressAlgorithm; 82 } QEMU_PACKED VMDK4Header; 83 84 #define L2_CACHE_SIZE 16 85 86 typedef struct VmdkExtent { 87 BlockDriverState *file; 88 bool flat; 89 bool compressed; 90 bool has_marker; 91 bool has_zero_grain; 92 int version; 93 int64_t sectors; 94 int64_t end_sector; 95 int64_t flat_start_offset; 96 int64_t l1_table_offset; 97 int64_t l1_backup_table_offset; 98 uint32_t *l1_table; 99 uint32_t *l1_backup_table; 100 unsigned int l1_size; 101 uint32_t l1_entry_sectors; 102 103 unsigned int l2_size; 104 uint32_t *l2_cache; 105 uint32_t l2_cache_offsets[L2_CACHE_SIZE]; 106 uint32_t l2_cache_counts[L2_CACHE_SIZE]; 107 108 int64_t cluster_sectors; 109 char *type; 110 } VmdkExtent; 111 112 typedef struct BDRVVmdkState { 113 CoMutex lock; 114 uint64_t desc_offset; 115 bool cid_updated; 116 bool cid_checked; 117 uint32_t cid; 118 uint32_t parent_cid; 119 int num_extents; 120 /* Extent array with num_extents entries, ascend ordered by address */ 121 VmdkExtent *extents; 122 Error *migration_blocker; 123 char *create_type; 124 } BDRVVmdkState; 125 126 typedef struct VmdkMetaData { 127 uint32_t offset; 128 unsigned int l1_index; 129 unsigned int l2_index; 130 unsigned int l2_offset; 131 int valid; 132 uint32_t *l2_cache_entry; 133 } VmdkMetaData; 134 135 typedef struct VmdkGrainMarker { 136 uint64_t lba; 137 uint32_t size; 138 uint8_t data[0]; 139 } QEMU_PACKED VmdkGrainMarker; 140 141 enum { 142 MARKER_END_OF_STREAM = 0, 143 MARKER_GRAIN_TABLE = 1, 144 MARKER_GRAIN_DIRECTORY = 2, 145 MARKER_FOOTER = 3, 146 }; 147 148 static int vmdk_probe(const uint8_t *buf, int buf_size, const char *filename) 149 { 150 uint32_t magic; 151 152 if (buf_size < 4) { 153 return 0; 154 } 155 magic = be32_to_cpu(*(uint32_t *)buf); 156 if (magic == VMDK3_MAGIC || 157 magic == VMDK4_MAGIC) { 158 return 100; 159 } else { 160 const char *p = (const char *)buf; 161 const char *end = p + buf_size; 162 while (p < end) { 163 if (*p == '#') { 164 /* skip comment line */ 165 while (p < end && *p != '\n') { 166 p++; 167 } 168 p++; 169 continue; 170 } 171 if (*p == ' ') { 172 while (p < end && *p == ' ') { 173 p++; 174 } 175 /* skip '\r' if windows line endings used. */ 176 if (p < end && *p == '\r') { 177 p++; 178 } 179 /* only accept blank lines before 'version=' line */ 180 if (p == end || *p != '\n') { 181 return 0; 182 } 183 p++; 184 continue; 185 } 186 if (end - p >= strlen("version=X\n")) { 187 if (strncmp("version=1\n", p, strlen("version=1\n")) == 0 || 188 strncmp("version=2\n", p, strlen("version=2\n")) == 0) { 189 return 100; 190 } 191 } 192 if (end - p >= strlen("version=X\r\n")) { 193 if (strncmp("version=1\r\n", p, strlen("version=1\r\n")) == 0 || 194 strncmp("version=2\r\n", p, strlen("version=2\r\n")) == 0) { 195 return 100; 196 } 197 } 198 return 0; 199 } 200 return 0; 201 } 202 } 203 204 #define SECTOR_SIZE 512 205 #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */ 206 #define BUF_SIZE 4096 207 #define HEADER_SIZE 512 /* first sector of 512 bytes */ 208 209 static void vmdk_free_extents(BlockDriverState *bs) 210 { 211 int i; 212 BDRVVmdkState *s = bs->opaque; 213 VmdkExtent *e; 214 215 for (i = 0; i < s->num_extents; i++) { 216 e = &s->extents[i]; 217 g_free(e->l1_table); 218 g_free(e->l2_cache); 219 g_free(e->l1_backup_table); 220 g_free(e->type); 221 if (e->file != bs->file) { 222 bdrv_unref(e->file); 223 } 224 } 225 g_free(s->extents); 226 } 227 228 static void vmdk_free_last_extent(BlockDriverState *bs) 229 { 230 BDRVVmdkState *s = bs->opaque; 231 232 if (s->num_extents == 0) { 233 return; 234 } 235 s->num_extents--; 236 s->extents = g_realloc(s->extents, s->num_extents * sizeof(VmdkExtent)); 237 } 238 239 static uint32_t vmdk_read_cid(BlockDriverState *bs, int parent) 240 { 241 char desc[DESC_SIZE]; 242 uint32_t cid = 0xffffffff; 243 const char *p_name, *cid_str; 244 size_t cid_str_size; 245 BDRVVmdkState *s = bs->opaque; 246 int ret; 247 248 ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); 249 if (ret < 0) { 250 return 0; 251 } 252 253 if (parent) { 254 cid_str = "parentCID"; 255 cid_str_size = sizeof("parentCID"); 256 } else { 257 cid_str = "CID"; 258 cid_str_size = sizeof("CID"); 259 } 260 261 desc[DESC_SIZE - 1] = '\0'; 262 p_name = strstr(desc, cid_str); 263 if (p_name != NULL) { 264 p_name += cid_str_size; 265 sscanf(p_name, "%x", &cid); 266 } 267 268 return cid; 269 } 270 271 static int vmdk_write_cid(BlockDriverState *bs, uint32_t cid) 272 { 273 char desc[DESC_SIZE], tmp_desc[DESC_SIZE]; 274 char *p_name, *tmp_str; 275 BDRVVmdkState *s = bs->opaque; 276 int ret; 277 278 ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); 279 if (ret < 0) { 280 return ret; 281 } 282 283 desc[DESC_SIZE - 1] = '\0'; 284 tmp_str = strstr(desc, "parentCID"); 285 if (tmp_str == NULL) { 286 return -EINVAL; 287 } 288 289 pstrcpy(tmp_desc, sizeof(tmp_desc), tmp_str); 290 p_name = strstr(desc, "CID"); 291 if (p_name != NULL) { 292 p_name += sizeof("CID"); 293 snprintf(p_name, sizeof(desc) - (p_name - desc), "%x\n", cid); 294 pstrcat(desc, sizeof(desc), tmp_desc); 295 } 296 297 ret = bdrv_pwrite_sync(bs->file, s->desc_offset, desc, DESC_SIZE); 298 if (ret < 0) { 299 return ret; 300 } 301 302 return 0; 303 } 304 305 static int vmdk_is_cid_valid(BlockDriverState *bs) 306 { 307 BDRVVmdkState *s = bs->opaque; 308 BlockDriverState *p_bs = bs->backing_hd; 309 uint32_t cur_pcid; 310 311 if (!s->cid_checked && p_bs) { 312 cur_pcid = vmdk_read_cid(p_bs, 0); 313 if (s->parent_cid != cur_pcid) { 314 /* CID not valid */ 315 return 0; 316 } 317 } 318 s->cid_checked = true; 319 /* CID valid */ 320 return 1; 321 } 322 323 /* Queue extents, if any, for reopen() */ 324 static int vmdk_reopen_prepare(BDRVReopenState *state, 325 BlockReopenQueue *queue, Error **errp) 326 { 327 BDRVVmdkState *s; 328 int ret = -1; 329 int i; 330 VmdkExtent *e; 331 332 assert(state != NULL); 333 assert(state->bs != NULL); 334 335 if (queue == NULL) { 336 error_setg(errp, "No reopen queue for VMDK extents"); 337 goto exit; 338 } 339 340 s = state->bs->opaque; 341 342 assert(s != NULL); 343 344 for (i = 0; i < s->num_extents; i++) { 345 e = &s->extents[i]; 346 if (e->file != state->bs->file) { 347 bdrv_reopen_queue(queue, e->file, state->flags); 348 } 349 } 350 ret = 0; 351 352 exit: 353 return ret; 354 } 355 356 static int vmdk_parent_open(BlockDriverState *bs) 357 { 358 char *p_name; 359 char desc[DESC_SIZE + 1]; 360 BDRVVmdkState *s = bs->opaque; 361 int ret; 362 363 desc[DESC_SIZE] = '\0'; 364 ret = bdrv_pread(bs->file, s->desc_offset, desc, DESC_SIZE); 365 if (ret < 0) { 366 return ret; 367 } 368 369 p_name = strstr(desc, "parentFileNameHint"); 370 if (p_name != NULL) { 371 char *end_name; 372 373 p_name += sizeof("parentFileNameHint") + 1; 374 end_name = strchr(p_name, '\"'); 375 if (end_name == NULL) { 376 return -EINVAL; 377 } 378 if ((end_name - p_name) > sizeof(bs->backing_file) - 1) { 379 return -EINVAL; 380 } 381 382 pstrcpy(bs->backing_file, end_name - p_name + 1, p_name); 383 } 384 385 return 0; 386 } 387 388 /* Create and append extent to the extent array. Return the added VmdkExtent 389 * address. return NULL if allocation failed. */ 390 static int vmdk_add_extent(BlockDriverState *bs, 391 BlockDriverState *file, bool flat, int64_t sectors, 392 int64_t l1_offset, int64_t l1_backup_offset, 393 uint32_t l1_size, 394 int l2_size, uint64_t cluster_sectors, 395 VmdkExtent **new_extent, 396 Error **errp) 397 { 398 VmdkExtent *extent; 399 BDRVVmdkState *s = bs->opaque; 400 401 if (cluster_sectors > 0x200000) { 402 /* 0x200000 * 512Bytes = 1GB for one cluster is unrealistic */ 403 error_setg(errp, "Invalid granularity, image may be corrupt"); 404 return -EFBIG; 405 } 406 if (l1_size > 512 * 1024 * 1024) { 407 /* Although with big capacity and small l1_entry_sectors, we can get a 408 * big l1_size, we don't want unbounded value to allocate the table. 409 * Limit it to 512M, which is 16PB for default cluster and L2 table 410 * size */ 411 error_setg(errp, "L1 size too big"); 412 return -EFBIG; 413 } 414 415 s->extents = g_realloc(s->extents, 416 (s->num_extents + 1) * sizeof(VmdkExtent)); 417 extent = &s->extents[s->num_extents]; 418 s->num_extents++; 419 420 memset(extent, 0, sizeof(VmdkExtent)); 421 extent->file = file; 422 extent->flat = flat; 423 extent->sectors = sectors; 424 extent->l1_table_offset = l1_offset; 425 extent->l1_backup_table_offset = l1_backup_offset; 426 extent->l1_size = l1_size; 427 extent->l1_entry_sectors = l2_size * cluster_sectors; 428 extent->l2_size = l2_size; 429 extent->cluster_sectors = flat ? sectors : cluster_sectors; 430 431 if (s->num_extents > 1) { 432 extent->end_sector = (*(extent - 1)).end_sector + extent->sectors; 433 } else { 434 extent->end_sector = extent->sectors; 435 } 436 bs->total_sectors = extent->end_sector; 437 if (new_extent) { 438 *new_extent = extent; 439 } 440 return 0; 441 } 442 443 static int vmdk_init_tables(BlockDriverState *bs, VmdkExtent *extent, 444 Error **errp) 445 { 446 int ret; 447 int l1_size, i; 448 449 /* read the L1 table */ 450 l1_size = extent->l1_size * sizeof(uint32_t); 451 extent->l1_table = g_malloc(l1_size); 452 ret = bdrv_pread(extent->file, 453 extent->l1_table_offset, 454 extent->l1_table, 455 l1_size); 456 if (ret < 0) { 457 error_setg_errno(errp, -ret, 458 "Could not read l1 table from extent '%s'", 459 extent->file->filename); 460 goto fail_l1; 461 } 462 for (i = 0; i < extent->l1_size; i++) { 463 le32_to_cpus(&extent->l1_table[i]); 464 } 465 466 if (extent->l1_backup_table_offset) { 467 extent->l1_backup_table = g_malloc(l1_size); 468 ret = bdrv_pread(extent->file, 469 extent->l1_backup_table_offset, 470 extent->l1_backup_table, 471 l1_size); 472 if (ret < 0) { 473 error_setg_errno(errp, -ret, 474 "Could not read l1 backup table from extent '%s'", 475 extent->file->filename); 476 goto fail_l1b; 477 } 478 for (i = 0; i < extent->l1_size; i++) { 479 le32_to_cpus(&extent->l1_backup_table[i]); 480 } 481 } 482 483 extent->l2_cache = 484 g_malloc(extent->l2_size * L2_CACHE_SIZE * sizeof(uint32_t)); 485 return 0; 486 fail_l1b: 487 g_free(extent->l1_backup_table); 488 fail_l1: 489 g_free(extent->l1_table); 490 return ret; 491 } 492 493 static int vmdk_open_vmfs_sparse(BlockDriverState *bs, 494 BlockDriverState *file, 495 int flags, Error **errp) 496 { 497 int ret; 498 uint32_t magic; 499 VMDK3Header header; 500 VmdkExtent *extent; 501 502 ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); 503 if (ret < 0) { 504 error_setg_errno(errp, -ret, 505 "Could not read header from file '%s'", 506 file->filename); 507 return ret; 508 } 509 ret = vmdk_add_extent(bs, file, false, 510 le32_to_cpu(header.disk_sectors), 511 le32_to_cpu(header.l1dir_offset) << 9, 512 0, 513 le32_to_cpu(header.l1dir_size), 514 4096, 515 le32_to_cpu(header.granularity), 516 &extent, 517 errp); 518 if (ret < 0) { 519 return ret; 520 } 521 ret = vmdk_init_tables(bs, extent, errp); 522 if (ret) { 523 /* free extent allocated by vmdk_add_extent */ 524 vmdk_free_last_extent(bs); 525 } 526 return ret; 527 } 528 529 static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, 530 Error **errp); 531 532 static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset, 533 Error **errp) 534 { 535 int64_t size; 536 char *buf; 537 int ret; 538 539 size = bdrv_getlength(file); 540 if (size < 0) { 541 error_setg_errno(errp, -size, "Could not access file"); 542 return NULL; 543 } 544 545 size = MIN(size, 1 << 20); /* avoid unbounded allocation */ 546 buf = g_malloc0(size + 1); 547 548 ret = bdrv_pread(file, desc_offset, buf, size); 549 if (ret < 0) { 550 error_setg_errno(errp, -ret, "Could not read from file"); 551 g_free(buf); 552 return NULL; 553 } 554 555 return buf; 556 } 557 558 static int vmdk_open_vmdk4(BlockDriverState *bs, 559 BlockDriverState *file, 560 int flags, Error **errp) 561 { 562 int ret; 563 uint32_t magic; 564 uint32_t l1_size, l1_entry_sectors; 565 VMDK4Header header; 566 VmdkExtent *extent; 567 BDRVVmdkState *s = bs->opaque; 568 int64_t l1_backup_offset = 0; 569 570 ret = bdrv_pread(file, sizeof(magic), &header, sizeof(header)); 571 if (ret < 0) { 572 error_setg_errno(errp, -ret, 573 "Could not read header from file '%s'", 574 file->filename); 575 return -EINVAL; 576 } 577 if (header.capacity == 0) { 578 uint64_t desc_offset = le64_to_cpu(header.desc_offset); 579 if (desc_offset) { 580 char *buf = vmdk_read_desc(file, desc_offset << 9, errp); 581 if (!buf) { 582 return -EINVAL; 583 } 584 ret = vmdk_open_desc_file(bs, flags, buf, errp); 585 g_free(buf); 586 return ret; 587 } 588 } 589 590 if (!s->create_type) { 591 s->create_type = g_strdup("monolithicSparse"); 592 } 593 594 if (le64_to_cpu(header.gd_offset) == VMDK4_GD_AT_END) { 595 /* 596 * The footer takes precedence over the header, so read it in. The 597 * footer starts at offset -1024 from the end: One sector for the 598 * footer, and another one for the end-of-stream marker. 599 */ 600 struct { 601 struct { 602 uint64_t val; 603 uint32_t size; 604 uint32_t type; 605 uint8_t pad[512 - 16]; 606 } QEMU_PACKED footer_marker; 607 608 uint32_t magic; 609 VMDK4Header header; 610 uint8_t pad[512 - 4 - sizeof(VMDK4Header)]; 611 612 struct { 613 uint64_t val; 614 uint32_t size; 615 uint32_t type; 616 uint8_t pad[512 - 16]; 617 } QEMU_PACKED eos_marker; 618 } QEMU_PACKED footer; 619 620 ret = bdrv_pread(file, 621 bs->file->total_sectors * 512 - 1536, 622 &footer, sizeof(footer)); 623 if (ret < 0) { 624 return ret; 625 } 626 627 /* Some sanity checks for the footer */ 628 if (be32_to_cpu(footer.magic) != VMDK4_MAGIC || 629 le32_to_cpu(footer.footer_marker.size) != 0 || 630 le32_to_cpu(footer.footer_marker.type) != MARKER_FOOTER || 631 le64_to_cpu(footer.eos_marker.val) != 0 || 632 le32_to_cpu(footer.eos_marker.size) != 0 || 633 le32_to_cpu(footer.eos_marker.type) != MARKER_END_OF_STREAM) 634 { 635 return -EINVAL; 636 } 637 638 header = footer.header; 639 } 640 641 if (le32_to_cpu(header.version) > 3) { 642 char buf[64]; 643 snprintf(buf, sizeof(buf), "VMDK version %d", 644 le32_to_cpu(header.version)); 645 error_set(errp, QERR_UNKNOWN_BLOCK_FORMAT_FEATURE, 646 bs->device_name, "vmdk", buf); 647 return -ENOTSUP; 648 } else if (le32_to_cpu(header.version) == 3 && (flags & BDRV_O_RDWR)) { 649 /* VMware KB 2064959 explains that version 3 added support for 650 * persistent changed block tracking (CBT), and backup software can 651 * read it as version=1 if it doesn't care about the changed area 652 * information. So we are safe to enable read only. */ 653 error_setg(errp, "VMDK version 3 must be read only"); 654 return -EINVAL; 655 } 656 657 if (le32_to_cpu(header.num_gtes_per_gt) > 512) { 658 error_setg(errp, "L2 table size too big"); 659 return -EINVAL; 660 } 661 662 l1_entry_sectors = le32_to_cpu(header.num_gtes_per_gt) 663 * le64_to_cpu(header.granularity); 664 if (l1_entry_sectors == 0) { 665 return -EINVAL; 666 } 667 l1_size = (le64_to_cpu(header.capacity) + l1_entry_sectors - 1) 668 / l1_entry_sectors; 669 if (le32_to_cpu(header.flags) & VMDK4_FLAG_RGD) { 670 l1_backup_offset = le64_to_cpu(header.rgd_offset) << 9; 671 } 672 if (bdrv_getlength(file) < 673 le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE) { 674 error_setg(errp, "File truncated, expecting at least %lld bytes", 675 le64_to_cpu(header.grain_offset) * BDRV_SECTOR_SIZE); 676 return -EINVAL; 677 } 678 679 ret = vmdk_add_extent(bs, file, false, 680 le64_to_cpu(header.capacity), 681 le64_to_cpu(header.gd_offset) << 9, 682 l1_backup_offset, 683 l1_size, 684 le32_to_cpu(header.num_gtes_per_gt), 685 le64_to_cpu(header.granularity), 686 &extent, 687 errp); 688 if (ret < 0) { 689 return ret; 690 } 691 extent->compressed = 692 le16_to_cpu(header.compressAlgorithm) == VMDK4_COMPRESSION_DEFLATE; 693 if (extent->compressed) { 694 g_free(s->create_type); 695 s->create_type = g_strdup("streamOptimized"); 696 } 697 extent->has_marker = le32_to_cpu(header.flags) & VMDK4_FLAG_MARKER; 698 extent->version = le32_to_cpu(header.version); 699 extent->has_zero_grain = le32_to_cpu(header.flags) & VMDK4_FLAG_ZERO_GRAIN; 700 ret = vmdk_init_tables(bs, extent, errp); 701 if (ret) { 702 /* free extent allocated by vmdk_add_extent */ 703 vmdk_free_last_extent(bs); 704 } 705 return ret; 706 } 707 708 /* find an option value out of descriptor file */ 709 static int vmdk_parse_description(const char *desc, const char *opt_name, 710 char *buf, int buf_size) 711 { 712 char *opt_pos, *opt_end; 713 const char *end = desc + strlen(desc); 714 715 opt_pos = strstr(desc, opt_name); 716 if (!opt_pos) { 717 return VMDK_ERROR; 718 } 719 /* Skip "=\"" following opt_name */ 720 opt_pos += strlen(opt_name) + 2; 721 if (opt_pos >= end) { 722 return VMDK_ERROR; 723 } 724 opt_end = opt_pos; 725 while (opt_end < end && *opt_end != '"') { 726 opt_end++; 727 } 728 if (opt_end == end || buf_size < opt_end - opt_pos + 1) { 729 return VMDK_ERROR; 730 } 731 pstrcpy(buf, opt_end - opt_pos + 1, opt_pos); 732 return VMDK_OK; 733 } 734 735 /* Open an extent file and append to bs array */ 736 static int vmdk_open_sparse(BlockDriverState *bs, 737 BlockDriverState *file, int flags, 738 char *buf, Error **errp) 739 { 740 uint32_t magic; 741 742 magic = ldl_be_p(buf); 743 switch (magic) { 744 case VMDK3_MAGIC: 745 return vmdk_open_vmfs_sparse(bs, file, flags, errp); 746 break; 747 case VMDK4_MAGIC: 748 return vmdk_open_vmdk4(bs, file, flags, errp); 749 break; 750 default: 751 error_setg(errp, "Image not in VMDK format"); 752 return -EINVAL; 753 break; 754 } 755 } 756 757 static int vmdk_parse_extents(const char *desc, BlockDriverState *bs, 758 const char *desc_file_path, Error **errp) 759 { 760 int ret; 761 char access[11]; 762 char type[11]; 763 char fname[512]; 764 const char *p = desc; 765 int64_t sectors = 0; 766 int64_t flat_offset; 767 char extent_path[PATH_MAX]; 768 BlockDriverState *extent_file; 769 BDRVVmdkState *s = bs->opaque; 770 VmdkExtent *extent; 771 772 while (*p) { 773 /* parse extent line: 774 * RW [size in sectors] FLAT "file-name.vmdk" OFFSET 775 * or 776 * RW [size in sectors] SPARSE "file-name.vmdk" 777 */ 778 flat_offset = -1; 779 ret = sscanf(p, "%10s %" SCNd64 " %10s \"%511[^\n\r\"]\" %" SCNd64, 780 access, §ors, type, fname, &flat_offset); 781 if (ret < 4 || strcmp(access, "RW")) { 782 goto next_line; 783 } else if (!strcmp(type, "FLAT")) { 784 if (ret != 5 || flat_offset < 0) { 785 error_setg(errp, "Invalid extent lines: \n%s", p); 786 return -EINVAL; 787 } 788 } else if (!strcmp(type, "VMFS")) { 789 if (ret == 4) { 790 flat_offset = 0; 791 } else { 792 error_setg(errp, "Invalid extent lines:\n%s", p); 793 return -EINVAL; 794 } 795 } else if (ret != 4) { 796 error_setg(errp, "Invalid extent lines:\n%s", p); 797 return -EINVAL; 798 } 799 800 if (sectors <= 0 || 801 (strcmp(type, "FLAT") && strcmp(type, "SPARSE") && 802 strcmp(type, "VMFS") && strcmp(type, "VMFSSPARSE")) || 803 (strcmp(access, "RW"))) { 804 goto next_line; 805 } 806 807 path_combine(extent_path, sizeof(extent_path), 808 desc_file_path, fname); 809 extent_file = NULL; 810 ret = bdrv_open(&extent_file, extent_path, NULL, NULL, 811 bs->open_flags | BDRV_O_PROTOCOL, NULL, errp); 812 if (ret) { 813 return ret; 814 } 815 816 /* save to extents array */ 817 if (!strcmp(type, "FLAT") || !strcmp(type, "VMFS")) { 818 /* FLAT extent */ 819 820 ret = vmdk_add_extent(bs, extent_file, true, sectors, 821 0, 0, 0, 0, 0, &extent, errp); 822 if (ret < 0) { 823 return ret; 824 } 825 extent->flat_start_offset = flat_offset << 9; 826 } else if (!strcmp(type, "SPARSE") || !strcmp(type, "VMFSSPARSE")) { 827 /* SPARSE extent and VMFSSPARSE extent are both "COWD" sparse file*/ 828 char *buf = vmdk_read_desc(extent_file, 0, errp); 829 if (!buf) { 830 ret = -EINVAL; 831 } else { 832 ret = vmdk_open_sparse(bs, extent_file, bs->open_flags, buf, errp); 833 } 834 if (ret) { 835 g_free(buf); 836 bdrv_unref(extent_file); 837 return ret; 838 } 839 extent = &s->extents[s->num_extents - 1]; 840 } else { 841 error_setg(errp, "Unsupported extent type '%s'", type); 842 return -ENOTSUP; 843 } 844 extent->type = g_strdup(type); 845 next_line: 846 /* move to next line */ 847 while (*p) { 848 if (*p == '\n') { 849 p++; 850 break; 851 } 852 p++; 853 } 854 } 855 return 0; 856 } 857 858 static int vmdk_open_desc_file(BlockDriverState *bs, int flags, char *buf, 859 Error **errp) 860 { 861 int ret; 862 char ct[128]; 863 BDRVVmdkState *s = bs->opaque; 864 865 if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) { 866 error_setg(errp, "invalid VMDK image descriptor"); 867 ret = -EINVAL; 868 goto exit; 869 } 870 if (strcmp(ct, "monolithicFlat") && 871 strcmp(ct, "vmfs") && 872 strcmp(ct, "vmfsSparse") && 873 strcmp(ct, "twoGbMaxExtentSparse") && 874 strcmp(ct, "twoGbMaxExtentFlat")) { 875 error_setg(errp, "Unsupported image type '%s'", ct); 876 ret = -ENOTSUP; 877 goto exit; 878 } 879 s->create_type = g_strdup(ct); 880 s->desc_offset = 0; 881 ret = vmdk_parse_extents(buf, bs, bs->file->filename, errp); 882 exit: 883 return ret; 884 } 885 886 static int vmdk_open(BlockDriverState *bs, QDict *options, int flags, 887 Error **errp) 888 { 889 char *buf = NULL; 890 int ret; 891 BDRVVmdkState *s = bs->opaque; 892 uint32_t magic; 893 894 buf = vmdk_read_desc(bs->file, 0, errp); 895 if (!buf) { 896 return -EINVAL; 897 } 898 899 magic = ldl_be_p(buf); 900 switch (magic) { 901 case VMDK3_MAGIC: 902 case VMDK4_MAGIC: 903 ret = vmdk_open_sparse(bs, bs->file, flags, buf, errp); 904 s->desc_offset = 0x200; 905 break; 906 default: 907 ret = vmdk_open_desc_file(bs, flags, buf, errp); 908 break; 909 } 910 if (ret) { 911 goto fail; 912 } 913 914 /* try to open parent images, if exist */ 915 ret = vmdk_parent_open(bs); 916 if (ret) { 917 goto fail; 918 } 919 s->cid = vmdk_read_cid(bs, 0); 920 s->parent_cid = vmdk_read_cid(bs, 1); 921 qemu_co_mutex_init(&s->lock); 922 923 /* Disable migration when VMDK images are used */ 924 error_set(&s->migration_blocker, 925 QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED, 926 "vmdk", bs->device_name, "live migration"); 927 migrate_add_blocker(s->migration_blocker); 928 g_free(buf); 929 return 0; 930 931 fail: 932 g_free(buf); 933 g_free(s->create_type); 934 s->create_type = NULL; 935 vmdk_free_extents(bs); 936 return ret; 937 } 938 939 940 static int vmdk_refresh_limits(BlockDriverState *bs) 941 { 942 BDRVVmdkState *s = bs->opaque; 943 int i; 944 945 for (i = 0; i < s->num_extents; i++) { 946 if (!s->extents[i].flat) { 947 bs->bl.write_zeroes_alignment = 948 MAX(bs->bl.write_zeroes_alignment, 949 s->extents[i].cluster_sectors); 950 } 951 } 952 953 return 0; 954 } 955 956 static int get_whole_cluster(BlockDriverState *bs, 957 VmdkExtent *extent, 958 uint64_t cluster_offset, 959 uint64_t offset, 960 bool allocate) 961 { 962 int ret = VMDK_OK; 963 uint8_t *whole_grain = NULL; 964 965 /* we will be here if it's first write on non-exist grain(cluster). 966 * try to read from parent image, if exist */ 967 if (bs->backing_hd) { 968 whole_grain = 969 qemu_blockalign(bs, extent->cluster_sectors << BDRV_SECTOR_BITS); 970 if (!vmdk_is_cid_valid(bs)) { 971 ret = VMDK_ERROR; 972 goto exit; 973 } 974 975 /* floor offset to cluster */ 976 offset -= offset % (extent->cluster_sectors * 512); 977 ret = bdrv_read(bs->backing_hd, offset >> 9, whole_grain, 978 extent->cluster_sectors); 979 if (ret < 0) { 980 ret = VMDK_ERROR; 981 goto exit; 982 } 983 984 /* Write grain only into the active image */ 985 ret = bdrv_write(extent->file, cluster_offset, whole_grain, 986 extent->cluster_sectors); 987 if (ret < 0) { 988 ret = VMDK_ERROR; 989 goto exit; 990 } 991 } 992 exit: 993 qemu_vfree(whole_grain); 994 return ret; 995 } 996 997 static int vmdk_L2update(VmdkExtent *extent, VmdkMetaData *m_data) 998 { 999 uint32_t offset; 1000 QEMU_BUILD_BUG_ON(sizeof(offset) != sizeof(m_data->offset)); 1001 offset = cpu_to_le32(m_data->offset); 1002 /* update L2 table */ 1003 if (bdrv_pwrite_sync( 1004 extent->file, 1005 ((int64_t)m_data->l2_offset * 512) 1006 + (m_data->l2_index * sizeof(m_data->offset)), 1007 &offset, sizeof(offset)) < 0) { 1008 return VMDK_ERROR; 1009 } 1010 /* update backup L2 table */ 1011 if (extent->l1_backup_table_offset != 0) { 1012 m_data->l2_offset = extent->l1_backup_table[m_data->l1_index]; 1013 if (bdrv_pwrite_sync( 1014 extent->file, 1015 ((int64_t)m_data->l2_offset * 512) 1016 + (m_data->l2_index * sizeof(m_data->offset)), 1017 &offset, sizeof(offset)) < 0) { 1018 return VMDK_ERROR; 1019 } 1020 } 1021 if (m_data->l2_cache_entry) { 1022 *m_data->l2_cache_entry = offset; 1023 } 1024 1025 return VMDK_OK; 1026 } 1027 1028 static int get_cluster_offset(BlockDriverState *bs, 1029 VmdkExtent *extent, 1030 VmdkMetaData *m_data, 1031 uint64_t offset, 1032 int allocate, 1033 uint64_t *cluster_offset) 1034 { 1035 unsigned int l1_index, l2_offset, l2_index; 1036 int min_index, i, j; 1037 uint32_t min_count, *l2_table; 1038 bool zeroed = false; 1039 1040 if (m_data) { 1041 m_data->valid = 0; 1042 } 1043 if (extent->flat) { 1044 *cluster_offset = extent->flat_start_offset; 1045 return VMDK_OK; 1046 } 1047 1048 offset -= (extent->end_sector - extent->sectors) * SECTOR_SIZE; 1049 l1_index = (offset >> 9) / extent->l1_entry_sectors; 1050 if (l1_index >= extent->l1_size) { 1051 return VMDK_ERROR; 1052 } 1053 l2_offset = extent->l1_table[l1_index]; 1054 if (!l2_offset) { 1055 return VMDK_UNALLOC; 1056 } 1057 for (i = 0; i < L2_CACHE_SIZE; i++) { 1058 if (l2_offset == extent->l2_cache_offsets[i]) { 1059 /* increment the hit count */ 1060 if (++extent->l2_cache_counts[i] == 0xffffffff) { 1061 for (j = 0; j < L2_CACHE_SIZE; j++) { 1062 extent->l2_cache_counts[j] >>= 1; 1063 } 1064 } 1065 l2_table = extent->l2_cache + (i * extent->l2_size); 1066 goto found; 1067 } 1068 } 1069 /* not found: load a new entry in the least used one */ 1070 min_index = 0; 1071 min_count = 0xffffffff; 1072 for (i = 0; i < L2_CACHE_SIZE; i++) { 1073 if (extent->l2_cache_counts[i] < min_count) { 1074 min_count = extent->l2_cache_counts[i]; 1075 min_index = i; 1076 } 1077 } 1078 l2_table = extent->l2_cache + (min_index * extent->l2_size); 1079 if (bdrv_pread( 1080 extent->file, 1081 (int64_t)l2_offset * 512, 1082 l2_table, 1083 extent->l2_size * sizeof(uint32_t) 1084 ) != extent->l2_size * sizeof(uint32_t)) { 1085 return VMDK_ERROR; 1086 } 1087 1088 extent->l2_cache_offsets[min_index] = l2_offset; 1089 extent->l2_cache_counts[min_index] = 1; 1090 found: 1091 l2_index = ((offset >> 9) / extent->cluster_sectors) % extent->l2_size; 1092 *cluster_offset = le32_to_cpu(l2_table[l2_index]); 1093 1094 if (m_data) { 1095 m_data->valid = 1; 1096 m_data->l1_index = l1_index; 1097 m_data->l2_index = l2_index; 1098 m_data->offset = *cluster_offset; 1099 m_data->l2_offset = l2_offset; 1100 m_data->l2_cache_entry = &l2_table[l2_index]; 1101 } 1102 if (extent->has_zero_grain && *cluster_offset == VMDK_GTE_ZEROED) { 1103 zeroed = true; 1104 } 1105 1106 if (!*cluster_offset || zeroed) { 1107 if (!allocate) { 1108 return zeroed ? VMDK_ZEROED : VMDK_UNALLOC; 1109 } 1110 1111 /* Avoid the L2 tables update for the images that have snapshots. */ 1112 *cluster_offset = bdrv_getlength(extent->file); 1113 if (!extent->compressed) { 1114 bdrv_truncate( 1115 extent->file, 1116 *cluster_offset + (extent->cluster_sectors << 9) 1117 ); 1118 } 1119 1120 *cluster_offset >>= 9; 1121 l2_table[l2_index] = cpu_to_le32(*cluster_offset); 1122 1123 /* First of all we write grain itself, to avoid race condition 1124 * that may to corrupt the image. 1125 * This problem may occur because of insufficient space on host disk 1126 * or inappropriate VM shutdown. 1127 */ 1128 if (get_whole_cluster( 1129 bs, extent, *cluster_offset, offset, allocate) == -1) { 1130 return VMDK_ERROR; 1131 } 1132 1133 if (m_data) { 1134 m_data->offset = *cluster_offset; 1135 } 1136 } 1137 *cluster_offset <<= 9; 1138 return VMDK_OK; 1139 } 1140 1141 static VmdkExtent *find_extent(BDRVVmdkState *s, 1142 int64_t sector_num, VmdkExtent *start_hint) 1143 { 1144 VmdkExtent *extent = start_hint; 1145 1146 if (!extent) { 1147 extent = &s->extents[0]; 1148 } 1149 while (extent < &s->extents[s->num_extents]) { 1150 if (sector_num < extent->end_sector) { 1151 return extent; 1152 } 1153 extent++; 1154 } 1155 return NULL; 1156 } 1157 1158 static int64_t coroutine_fn vmdk_co_get_block_status(BlockDriverState *bs, 1159 int64_t sector_num, int nb_sectors, int *pnum) 1160 { 1161 BDRVVmdkState *s = bs->opaque; 1162 int64_t index_in_cluster, n, ret; 1163 uint64_t offset; 1164 VmdkExtent *extent; 1165 1166 extent = find_extent(s, sector_num, NULL); 1167 if (!extent) { 1168 return 0; 1169 } 1170 qemu_co_mutex_lock(&s->lock); 1171 ret = get_cluster_offset(bs, extent, NULL, 1172 sector_num * 512, 0, &offset); 1173 qemu_co_mutex_unlock(&s->lock); 1174 1175 switch (ret) { 1176 case VMDK_ERROR: 1177 ret = -EIO; 1178 break; 1179 case VMDK_UNALLOC: 1180 ret = 0; 1181 break; 1182 case VMDK_ZEROED: 1183 ret = BDRV_BLOCK_ZERO; 1184 break; 1185 case VMDK_OK: 1186 ret = BDRV_BLOCK_DATA; 1187 if (extent->file == bs->file && !extent->compressed) { 1188 ret |= BDRV_BLOCK_OFFSET_VALID | offset; 1189 } 1190 1191 break; 1192 } 1193 1194 index_in_cluster = sector_num % extent->cluster_sectors; 1195 n = extent->cluster_sectors - index_in_cluster; 1196 if (n > nb_sectors) { 1197 n = nb_sectors; 1198 } 1199 *pnum = n; 1200 return ret; 1201 } 1202 1203 static int vmdk_write_extent(VmdkExtent *extent, int64_t cluster_offset, 1204 int64_t offset_in_cluster, const uint8_t *buf, 1205 int nb_sectors, int64_t sector_num) 1206 { 1207 int ret; 1208 VmdkGrainMarker *data = NULL; 1209 uLongf buf_len; 1210 const uint8_t *write_buf = buf; 1211 int write_len = nb_sectors * 512; 1212 1213 if (extent->compressed) { 1214 if (!extent->has_marker) { 1215 ret = -EINVAL; 1216 goto out; 1217 } 1218 buf_len = (extent->cluster_sectors << 9) * 2; 1219 data = g_malloc(buf_len + sizeof(VmdkGrainMarker)); 1220 if (compress(data->data, &buf_len, buf, nb_sectors << 9) != Z_OK || 1221 buf_len == 0) { 1222 ret = -EINVAL; 1223 goto out; 1224 } 1225 data->lba = sector_num; 1226 data->size = buf_len; 1227 write_buf = (uint8_t *)data; 1228 write_len = buf_len + sizeof(VmdkGrainMarker); 1229 } 1230 ret = bdrv_pwrite(extent->file, 1231 cluster_offset + offset_in_cluster, 1232 write_buf, 1233 write_len); 1234 if (ret != write_len) { 1235 ret = ret < 0 ? ret : -EIO; 1236 goto out; 1237 } 1238 ret = 0; 1239 out: 1240 g_free(data); 1241 return ret; 1242 } 1243 1244 static int vmdk_read_extent(VmdkExtent *extent, int64_t cluster_offset, 1245 int64_t offset_in_cluster, uint8_t *buf, 1246 int nb_sectors) 1247 { 1248 int ret; 1249 int cluster_bytes, buf_bytes; 1250 uint8_t *cluster_buf, *compressed_data; 1251 uint8_t *uncomp_buf; 1252 uint32_t data_len; 1253 VmdkGrainMarker *marker; 1254 uLongf buf_len; 1255 1256 1257 if (!extent->compressed) { 1258 ret = bdrv_pread(extent->file, 1259 cluster_offset + offset_in_cluster, 1260 buf, nb_sectors * 512); 1261 if (ret == nb_sectors * 512) { 1262 return 0; 1263 } else { 1264 return -EIO; 1265 } 1266 } 1267 cluster_bytes = extent->cluster_sectors * 512; 1268 /* Read two clusters in case GrainMarker + compressed data > one cluster */ 1269 buf_bytes = cluster_bytes * 2; 1270 cluster_buf = g_malloc(buf_bytes); 1271 uncomp_buf = g_malloc(cluster_bytes); 1272 ret = bdrv_pread(extent->file, 1273 cluster_offset, 1274 cluster_buf, buf_bytes); 1275 if (ret < 0) { 1276 goto out; 1277 } 1278 compressed_data = cluster_buf; 1279 buf_len = cluster_bytes; 1280 data_len = cluster_bytes; 1281 if (extent->has_marker) { 1282 marker = (VmdkGrainMarker *)cluster_buf; 1283 compressed_data = marker->data; 1284 data_len = le32_to_cpu(marker->size); 1285 } 1286 if (!data_len || data_len > buf_bytes) { 1287 ret = -EINVAL; 1288 goto out; 1289 } 1290 ret = uncompress(uncomp_buf, &buf_len, compressed_data, data_len); 1291 if (ret != Z_OK) { 1292 ret = -EINVAL; 1293 goto out; 1294 1295 } 1296 if (offset_in_cluster < 0 || 1297 offset_in_cluster + nb_sectors * 512 > buf_len) { 1298 ret = -EINVAL; 1299 goto out; 1300 } 1301 memcpy(buf, uncomp_buf + offset_in_cluster, nb_sectors * 512); 1302 ret = 0; 1303 1304 out: 1305 g_free(uncomp_buf); 1306 g_free(cluster_buf); 1307 return ret; 1308 } 1309 1310 static int vmdk_read(BlockDriverState *bs, int64_t sector_num, 1311 uint8_t *buf, int nb_sectors) 1312 { 1313 BDRVVmdkState *s = bs->opaque; 1314 int ret; 1315 uint64_t n, index_in_cluster; 1316 uint64_t extent_begin_sector, extent_relative_sector_num; 1317 VmdkExtent *extent = NULL; 1318 uint64_t cluster_offset; 1319 1320 while (nb_sectors > 0) { 1321 extent = find_extent(s, sector_num, extent); 1322 if (!extent) { 1323 return -EIO; 1324 } 1325 ret = get_cluster_offset( 1326 bs, extent, NULL, 1327 sector_num << 9, 0, &cluster_offset); 1328 extent_begin_sector = extent->end_sector - extent->sectors; 1329 extent_relative_sector_num = sector_num - extent_begin_sector; 1330 index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; 1331 n = extent->cluster_sectors - index_in_cluster; 1332 if (n > nb_sectors) { 1333 n = nb_sectors; 1334 } 1335 if (ret != VMDK_OK) { 1336 /* if not allocated, try to read from parent image, if exist */ 1337 if (bs->backing_hd && ret != VMDK_ZEROED) { 1338 if (!vmdk_is_cid_valid(bs)) { 1339 return -EINVAL; 1340 } 1341 ret = bdrv_read(bs->backing_hd, sector_num, buf, n); 1342 if (ret < 0) { 1343 return ret; 1344 } 1345 } else { 1346 memset(buf, 0, 512 * n); 1347 } 1348 } else { 1349 ret = vmdk_read_extent(extent, 1350 cluster_offset, index_in_cluster * 512, 1351 buf, n); 1352 if (ret) { 1353 return ret; 1354 } 1355 } 1356 nb_sectors -= n; 1357 sector_num += n; 1358 buf += n * 512; 1359 } 1360 return 0; 1361 } 1362 1363 static coroutine_fn int vmdk_co_read(BlockDriverState *bs, int64_t sector_num, 1364 uint8_t *buf, int nb_sectors) 1365 { 1366 int ret; 1367 BDRVVmdkState *s = bs->opaque; 1368 qemu_co_mutex_lock(&s->lock); 1369 ret = vmdk_read(bs, sector_num, buf, nb_sectors); 1370 qemu_co_mutex_unlock(&s->lock); 1371 return ret; 1372 } 1373 1374 /** 1375 * vmdk_write: 1376 * @zeroed: buf is ignored (data is zero), use zeroed_grain GTE feature 1377 * if possible, otherwise return -ENOTSUP. 1378 * @zero_dry_run: used for zeroed == true only, don't update L2 table, just try 1379 * with each cluster. By dry run we can find if the zero write 1380 * is possible without modifying image data. 1381 * 1382 * Returns: error code with 0 for success. 1383 */ 1384 static int vmdk_write(BlockDriverState *bs, int64_t sector_num, 1385 const uint8_t *buf, int nb_sectors, 1386 bool zeroed, bool zero_dry_run) 1387 { 1388 BDRVVmdkState *s = bs->opaque; 1389 VmdkExtent *extent = NULL; 1390 int ret; 1391 int64_t index_in_cluster, n; 1392 uint64_t extent_begin_sector, extent_relative_sector_num; 1393 uint64_t cluster_offset; 1394 VmdkMetaData m_data; 1395 1396 if (sector_num > bs->total_sectors) { 1397 error_report("Wrong offset: sector_num=0x%" PRIx64 1398 " total_sectors=0x%" PRIx64 "\n", 1399 sector_num, bs->total_sectors); 1400 return -EIO; 1401 } 1402 1403 while (nb_sectors > 0) { 1404 extent = find_extent(s, sector_num, extent); 1405 if (!extent) { 1406 return -EIO; 1407 } 1408 ret = get_cluster_offset( 1409 bs, 1410 extent, 1411 &m_data, 1412 sector_num << 9, !extent->compressed, 1413 &cluster_offset); 1414 if (extent->compressed) { 1415 if (ret == VMDK_OK) { 1416 /* Refuse write to allocated cluster for streamOptimized */ 1417 error_report("Could not write to allocated cluster" 1418 " for streamOptimized"); 1419 return -EIO; 1420 } else { 1421 /* allocate */ 1422 ret = get_cluster_offset( 1423 bs, 1424 extent, 1425 &m_data, 1426 sector_num << 9, 1, 1427 &cluster_offset); 1428 } 1429 } 1430 if (ret == VMDK_ERROR) { 1431 return -EINVAL; 1432 } 1433 extent_begin_sector = extent->end_sector - extent->sectors; 1434 extent_relative_sector_num = sector_num - extent_begin_sector; 1435 index_in_cluster = extent_relative_sector_num % extent->cluster_sectors; 1436 n = extent->cluster_sectors - index_in_cluster; 1437 if (n > nb_sectors) { 1438 n = nb_sectors; 1439 } 1440 if (zeroed) { 1441 /* Do zeroed write, buf is ignored */ 1442 if (extent->has_zero_grain && 1443 index_in_cluster == 0 && 1444 n >= extent->cluster_sectors) { 1445 n = extent->cluster_sectors; 1446 if (!zero_dry_run) { 1447 m_data.offset = VMDK_GTE_ZEROED; 1448 /* update L2 tables */ 1449 if (vmdk_L2update(extent, &m_data) != VMDK_OK) { 1450 return -EIO; 1451 } 1452 } 1453 } else { 1454 return -ENOTSUP; 1455 } 1456 } else { 1457 ret = vmdk_write_extent(extent, 1458 cluster_offset, index_in_cluster * 512, 1459 buf, n, sector_num); 1460 if (ret) { 1461 return ret; 1462 } 1463 if (m_data.valid) { 1464 /* update L2 tables */ 1465 if (vmdk_L2update(extent, &m_data) != VMDK_OK) { 1466 return -EIO; 1467 } 1468 } 1469 } 1470 nb_sectors -= n; 1471 sector_num += n; 1472 buf += n * 512; 1473 1474 /* update CID on the first write every time the virtual disk is 1475 * opened */ 1476 if (!s->cid_updated) { 1477 ret = vmdk_write_cid(bs, time(NULL)); 1478 if (ret < 0) { 1479 return ret; 1480 } 1481 s->cid_updated = true; 1482 } 1483 } 1484 return 0; 1485 } 1486 1487 static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num, 1488 const uint8_t *buf, int nb_sectors) 1489 { 1490 int ret; 1491 BDRVVmdkState *s = bs->opaque; 1492 qemu_co_mutex_lock(&s->lock); 1493 ret = vmdk_write(bs, sector_num, buf, nb_sectors, false, false); 1494 qemu_co_mutex_unlock(&s->lock); 1495 return ret; 1496 } 1497 1498 static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs, 1499 int64_t sector_num, 1500 int nb_sectors, 1501 BdrvRequestFlags flags) 1502 { 1503 int ret; 1504 BDRVVmdkState *s = bs->opaque; 1505 qemu_co_mutex_lock(&s->lock); 1506 /* write zeroes could fail if sectors not aligned to cluster, test it with 1507 * dry_run == true before really updating image */ 1508 ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, true); 1509 if (!ret) { 1510 ret = vmdk_write(bs, sector_num, NULL, nb_sectors, true, false); 1511 } 1512 qemu_co_mutex_unlock(&s->lock); 1513 return ret; 1514 } 1515 1516 static int vmdk_create_extent(const char *filename, int64_t filesize, 1517 bool flat, bool compress, bool zeroed_grain, 1518 Error **errp) 1519 { 1520 int ret, i; 1521 BlockDriverState *bs = NULL; 1522 VMDK4Header header; 1523 Error *local_err; 1524 uint32_t tmp, magic, grains, gd_sectors, gt_size, gt_count; 1525 uint32_t *gd_buf = NULL; 1526 int gd_buf_size; 1527 1528 ret = bdrv_create_file(filename, NULL, &local_err); 1529 if (ret < 0) { 1530 error_propagate(errp, local_err); 1531 goto exit; 1532 } 1533 1534 assert(bs == NULL); 1535 ret = bdrv_open(&bs, filename, NULL, NULL, BDRV_O_RDWR | BDRV_O_PROTOCOL, 1536 NULL, &local_err); 1537 if (ret < 0) { 1538 error_propagate(errp, local_err); 1539 goto exit; 1540 } 1541 1542 if (flat) { 1543 ret = bdrv_truncate(bs, filesize); 1544 if (ret < 0) { 1545 error_setg_errno(errp, -ret, "Could not truncate file"); 1546 } 1547 goto exit; 1548 } 1549 magic = cpu_to_be32(VMDK4_MAGIC); 1550 memset(&header, 0, sizeof(header)); 1551 header.version = zeroed_grain ? 2 : 1; 1552 header.flags = VMDK4_FLAG_RGD | VMDK4_FLAG_NL_DETECT 1553 | (compress ? VMDK4_FLAG_COMPRESS | VMDK4_FLAG_MARKER : 0) 1554 | (zeroed_grain ? VMDK4_FLAG_ZERO_GRAIN : 0); 1555 header.compressAlgorithm = compress ? VMDK4_COMPRESSION_DEFLATE : 0; 1556 header.capacity = filesize / BDRV_SECTOR_SIZE; 1557 header.granularity = 128; 1558 header.num_gtes_per_gt = BDRV_SECTOR_SIZE; 1559 1560 grains = DIV_ROUND_UP(filesize / BDRV_SECTOR_SIZE, header.granularity); 1561 gt_size = DIV_ROUND_UP(header.num_gtes_per_gt * sizeof(uint32_t), 1562 BDRV_SECTOR_SIZE); 1563 gt_count = DIV_ROUND_UP(grains, header.num_gtes_per_gt); 1564 gd_sectors = DIV_ROUND_UP(gt_count * sizeof(uint32_t), BDRV_SECTOR_SIZE); 1565 1566 header.desc_offset = 1; 1567 header.desc_size = 20; 1568 header.rgd_offset = header.desc_offset + header.desc_size; 1569 header.gd_offset = header.rgd_offset + gd_sectors + (gt_size * gt_count); 1570 header.grain_offset = 1571 ROUND_UP(header.gd_offset + gd_sectors + (gt_size * gt_count), 1572 header.granularity); 1573 /* swap endianness for all header fields */ 1574 header.version = cpu_to_le32(header.version); 1575 header.flags = cpu_to_le32(header.flags); 1576 header.capacity = cpu_to_le64(header.capacity); 1577 header.granularity = cpu_to_le64(header.granularity); 1578 header.num_gtes_per_gt = cpu_to_le32(header.num_gtes_per_gt); 1579 header.desc_offset = cpu_to_le64(header.desc_offset); 1580 header.desc_size = cpu_to_le64(header.desc_size); 1581 header.rgd_offset = cpu_to_le64(header.rgd_offset); 1582 header.gd_offset = cpu_to_le64(header.gd_offset); 1583 header.grain_offset = cpu_to_le64(header.grain_offset); 1584 header.compressAlgorithm = cpu_to_le16(header.compressAlgorithm); 1585 1586 header.check_bytes[0] = 0xa; 1587 header.check_bytes[1] = 0x20; 1588 header.check_bytes[2] = 0xd; 1589 header.check_bytes[3] = 0xa; 1590 1591 /* write all the data */ 1592 ret = bdrv_pwrite(bs, 0, &magic, sizeof(magic)); 1593 if (ret < 0) { 1594 error_set(errp, QERR_IO_ERROR); 1595 goto exit; 1596 } 1597 ret = bdrv_pwrite(bs, sizeof(magic), &header, sizeof(header)); 1598 if (ret < 0) { 1599 error_set(errp, QERR_IO_ERROR); 1600 goto exit; 1601 } 1602 1603 ret = bdrv_truncate(bs, le64_to_cpu(header.grain_offset) << 9); 1604 if (ret < 0) { 1605 error_setg_errno(errp, -ret, "Could not truncate file"); 1606 goto exit; 1607 } 1608 1609 /* write grain directory */ 1610 gd_buf_size = gd_sectors * BDRV_SECTOR_SIZE; 1611 gd_buf = g_malloc0(gd_buf_size); 1612 for (i = 0, tmp = le64_to_cpu(header.rgd_offset) + gd_sectors; 1613 i < gt_count; i++, tmp += gt_size) { 1614 gd_buf[i] = cpu_to_le32(tmp); 1615 } 1616 ret = bdrv_pwrite(bs, le64_to_cpu(header.rgd_offset) * BDRV_SECTOR_SIZE, 1617 gd_buf, gd_buf_size); 1618 if (ret < 0) { 1619 error_set(errp, QERR_IO_ERROR); 1620 goto exit; 1621 } 1622 1623 /* write backup grain directory */ 1624 for (i = 0, tmp = le64_to_cpu(header.gd_offset) + gd_sectors; 1625 i < gt_count; i++, tmp += gt_size) { 1626 gd_buf[i] = cpu_to_le32(tmp); 1627 } 1628 ret = bdrv_pwrite(bs, le64_to_cpu(header.gd_offset) * BDRV_SECTOR_SIZE, 1629 gd_buf, gd_buf_size); 1630 if (ret < 0) { 1631 error_set(errp, QERR_IO_ERROR); 1632 goto exit; 1633 } 1634 1635 ret = 0; 1636 exit: 1637 if (bs) { 1638 bdrv_unref(bs); 1639 } 1640 g_free(gd_buf); 1641 return ret; 1642 } 1643 1644 static int filename_decompose(const char *filename, char *path, char *prefix, 1645 char *postfix, size_t buf_len, Error **errp) 1646 { 1647 const char *p, *q; 1648 1649 if (filename == NULL || !strlen(filename)) { 1650 error_setg(errp, "No filename provided"); 1651 return VMDK_ERROR; 1652 } 1653 p = strrchr(filename, '/'); 1654 if (p == NULL) { 1655 p = strrchr(filename, '\\'); 1656 } 1657 if (p == NULL) { 1658 p = strrchr(filename, ':'); 1659 } 1660 if (p != NULL) { 1661 p++; 1662 if (p - filename >= buf_len) { 1663 return VMDK_ERROR; 1664 } 1665 pstrcpy(path, p - filename + 1, filename); 1666 } else { 1667 p = filename; 1668 path[0] = '\0'; 1669 } 1670 q = strrchr(p, '.'); 1671 if (q == NULL) { 1672 pstrcpy(prefix, buf_len, p); 1673 postfix[0] = '\0'; 1674 } else { 1675 if (q - p >= buf_len) { 1676 return VMDK_ERROR; 1677 } 1678 pstrcpy(prefix, q - p + 1, p); 1679 pstrcpy(postfix, buf_len, q); 1680 } 1681 return VMDK_OK; 1682 } 1683 1684 static int vmdk_create(const char *filename, QEMUOptionParameter *options, 1685 Error **errp) 1686 { 1687 int idx = 0; 1688 BlockDriverState *new_bs = NULL; 1689 Error *local_err; 1690 char *desc = NULL; 1691 int64_t total_size = 0, filesize; 1692 const char *adapter_type = NULL; 1693 const char *backing_file = NULL; 1694 const char *fmt = NULL; 1695 int flags = 0; 1696 int ret = 0; 1697 bool flat, split, compress; 1698 GString *ext_desc_lines; 1699 char path[PATH_MAX], prefix[PATH_MAX], postfix[PATH_MAX]; 1700 const int64_t split_size = 0x80000000; /* VMDK has constant split size */ 1701 const char *desc_extent_line; 1702 char parent_desc_line[BUF_SIZE] = ""; 1703 uint32_t parent_cid = 0xffffffff; 1704 uint32_t number_heads = 16; 1705 bool zeroed_grain = false; 1706 uint32_t desc_offset = 0, desc_len; 1707 const char desc_template[] = 1708 "# Disk DescriptorFile\n" 1709 "version=1\n" 1710 "CID=%x\n" 1711 "parentCID=%x\n" 1712 "createType=\"%s\"\n" 1713 "%s" 1714 "\n" 1715 "# Extent description\n" 1716 "%s" 1717 "\n" 1718 "# The Disk Data Base\n" 1719 "#DDB\n" 1720 "\n" 1721 "ddb.virtualHWVersion = \"%d\"\n" 1722 "ddb.geometry.cylinders = \"%" PRId64 "\"\n" 1723 "ddb.geometry.heads = \"%d\"\n" 1724 "ddb.geometry.sectors = \"63\"\n" 1725 "ddb.adapterType = \"%s\"\n"; 1726 1727 ext_desc_lines = g_string_new(NULL); 1728 1729 if (filename_decompose(filename, path, prefix, postfix, PATH_MAX, errp)) { 1730 ret = -EINVAL; 1731 goto exit; 1732 } 1733 /* Read out options */ 1734 while (options && options->name) { 1735 if (!strcmp(options->name, BLOCK_OPT_SIZE)) { 1736 total_size = options->value.n; 1737 } else if (!strcmp(options->name, BLOCK_OPT_ADAPTER_TYPE)) { 1738 adapter_type = options->value.s; 1739 } else if (!strcmp(options->name, BLOCK_OPT_BACKING_FILE)) { 1740 backing_file = options->value.s; 1741 } else if (!strcmp(options->name, BLOCK_OPT_COMPAT6)) { 1742 flags |= options->value.n ? BLOCK_FLAG_COMPAT6 : 0; 1743 } else if (!strcmp(options->name, BLOCK_OPT_SUBFMT)) { 1744 fmt = options->value.s; 1745 } else if (!strcmp(options->name, BLOCK_OPT_ZEROED_GRAIN)) { 1746 zeroed_grain |= options->value.n; 1747 } 1748 options++; 1749 } 1750 if (!adapter_type) { 1751 adapter_type = "ide"; 1752 } else if (strcmp(adapter_type, "ide") && 1753 strcmp(adapter_type, "buslogic") && 1754 strcmp(adapter_type, "lsilogic") && 1755 strcmp(adapter_type, "legacyESX")) { 1756 error_setg(errp, "Unknown adapter type: '%s'", adapter_type); 1757 ret = -EINVAL; 1758 goto exit; 1759 } 1760 if (strcmp(adapter_type, "ide") != 0) { 1761 /* that's the number of heads with which vmware operates when 1762 creating, exporting, etc. vmdk files with a non-ide adapter type */ 1763 number_heads = 255; 1764 } 1765 if (!fmt) { 1766 /* Default format to monolithicSparse */ 1767 fmt = "monolithicSparse"; 1768 } else if (strcmp(fmt, "monolithicFlat") && 1769 strcmp(fmt, "monolithicSparse") && 1770 strcmp(fmt, "twoGbMaxExtentSparse") && 1771 strcmp(fmt, "twoGbMaxExtentFlat") && 1772 strcmp(fmt, "streamOptimized")) { 1773 error_setg(errp, "Unknown subformat: '%s'", fmt); 1774 ret = -EINVAL; 1775 goto exit; 1776 } 1777 split = !(strcmp(fmt, "twoGbMaxExtentFlat") && 1778 strcmp(fmt, "twoGbMaxExtentSparse")); 1779 flat = !(strcmp(fmt, "monolithicFlat") && 1780 strcmp(fmt, "twoGbMaxExtentFlat")); 1781 compress = !strcmp(fmt, "streamOptimized"); 1782 if (flat) { 1783 desc_extent_line = "RW %lld FLAT \"%s\" 0\n"; 1784 } else { 1785 desc_extent_line = "RW %lld SPARSE \"%s\"\n"; 1786 } 1787 if (flat && backing_file) { 1788 error_setg(errp, "Flat image can't have backing file"); 1789 ret = -ENOTSUP; 1790 goto exit; 1791 } 1792 if (flat && zeroed_grain) { 1793 error_setg(errp, "Flat image can't enable zeroed grain"); 1794 ret = -ENOTSUP; 1795 goto exit; 1796 } 1797 if (backing_file) { 1798 BlockDriverState *bs = NULL; 1799 ret = bdrv_open(&bs, backing_file, NULL, NULL, BDRV_O_NO_BACKING, NULL, 1800 errp); 1801 if (ret != 0) { 1802 goto exit; 1803 } 1804 if (strcmp(bs->drv->format_name, "vmdk")) { 1805 bdrv_unref(bs); 1806 ret = -EINVAL; 1807 goto exit; 1808 } 1809 parent_cid = vmdk_read_cid(bs, 0); 1810 bdrv_unref(bs); 1811 snprintf(parent_desc_line, sizeof(parent_desc_line), 1812 "parentFileNameHint=\"%s\"", backing_file); 1813 } 1814 1815 /* Create extents */ 1816 filesize = total_size; 1817 while (filesize > 0) { 1818 char desc_line[BUF_SIZE]; 1819 char ext_filename[PATH_MAX]; 1820 char desc_filename[PATH_MAX]; 1821 int64_t size = filesize; 1822 1823 if (split && size > split_size) { 1824 size = split_size; 1825 } 1826 if (split) { 1827 snprintf(desc_filename, sizeof(desc_filename), "%s-%c%03d%s", 1828 prefix, flat ? 'f' : 's', ++idx, postfix); 1829 } else if (flat) { 1830 snprintf(desc_filename, sizeof(desc_filename), "%s-flat%s", 1831 prefix, postfix); 1832 } else { 1833 snprintf(desc_filename, sizeof(desc_filename), "%s%s", 1834 prefix, postfix); 1835 } 1836 snprintf(ext_filename, sizeof(ext_filename), "%s%s", 1837 path, desc_filename); 1838 1839 if (vmdk_create_extent(ext_filename, size, 1840 flat, compress, zeroed_grain, errp)) { 1841 ret = -EINVAL; 1842 goto exit; 1843 } 1844 filesize -= size; 1845 1846 /* Format description line */ 1847 snprintf(desc_line, sizeof(desc_line), 1848 desc_extent_line, size / BDRV_SECTOR_SIZE, desc_filename); 1849 g_string_append(ext_desc_lines, desc_line); 1850 } 1851 /* generate descriptor file */ 1852 desc = g_strdup_printf(desc_template, 1853 (unsigned int)time(NULL), 1854 parent_cid, 1855 fmt, 1856 parent_desc_line, 1857 ext_desc_lines->str, 1858 (flags & BLOCK_FLAG_COMPAT6 ? 6 : 4), 1859 total_size / 1860 (int64_t)(63 * number_heads * BDRV_SECTOR_SIZE), 1861 number_heads, 1862 adapter_type); 1863 desc_len = strlen(desc); 1864 /* the descriptor offset = 0x200 */ 1865 if (!split && !flat) { 1866 desc_offset = 0x200; 1867 } else { 1868 ret = bdrv_create_file(filename, options, &local_err); 1869 if (ret < 0) { 1870 error_setg_errno(errp, -ret, "Could not create image file"); 1871 goto exit; 1872 } 1873 } 1874 assert(new_bs == NULL); 1875 ret = bdrv_open(&new_bs, filename, NULL, NULL, 1876 BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err); 1877 if (ret < 0) { 1878 error_setg_errno(errp, -ret, "Could not write description"); 1879 goto exit; 1880 } 1881 ret = bdrv_pwrite(new_bs, desc_offset, desc, desc_len); 1882 if (ret < 0) { 1883 error_setg_errno(errp, -ret, "Could not write description"); 1884 goto exit; 1885 } 1886 /* bdrv_pwrite write padding zeros to align to sector, we don't need that 1887 * for description file */ 1888 if (desc_offset == 0) { 1889 ret = bdrv_truncate(new_bs, desc_len); 1890 if (ret < 0) { 1891 error_setg_errno(errp, -ret, "Could not truncate file"); 1892 } 1893 } 1894 exit: 1895 if (new_bs) { 1896 bdrv_unref(new_bs); 1897 } 1898 g_free(desc); 1899 g_string_free(ext_desc_lines, true); 1900 return ret; 1901 } 1902 1903 static void vmdk_close(BlockDriverState *bs) 1904 { 1905 BDRVVmdkState *s = bs->opaque; 1906 1907 vmdk_free_extents(bs); 1908 g_free(s->create_type); 1909 1910 migrate_del_blocker(s->migration_blocker); 1911 error_free(s->migration_blocker); 1912 } 1913 1914 static coroutine_fn int vmdk_co_flush(BlockDriverState *bs) 1915 { 1916 BDRVVmdkState *s = bs->opaque; 1917 int i, err; 1918 int ret = 0; 1919 1920 for (i = 0; i < s->num_extents; i++) { 1921 err = bdrv_co_flush(s->extents[i].file); 1922 if (err < 0) { 1923 ret = err; 1924 } 1925 } 1926 return ret; 1927 } 1928 1929 static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs) 1930 { 1931 int i; 1932 int64_t ret = 0; 1933 int64_t r; 1934 BDRVVmdkState *s = bs->opaque; 1935 1936 ret = bdrv_get_allocated_file_size(bs->file); 1937 if (ret < 0) { 1938 return ret; 1939 } 1940 for (i = 0; i < s->num_extents; i++) { 1941 if (s->extents[i].file == bs->file) { 1942 continue; 1943 } 1944 r = bdrv_get_allocated_file_size(s->extents[i].file); 1945 if (r < 0) { 1946 return r; 1947 } 1948 ret += r; 1949 } 1950 return ret; 1951 } 1952 1953 static int vmdk_has_zero_init(BlockDriverState *bs) 1954 { 1955 int i; 1956 BDRVVmdkState *s = bs->opaque; 1957 1958 /* If has a flat extent and its underlying storage doesn't have zero init, 1959 * return 0. */ 1960 for (i = 0; i < s->num_extents; i++) { 1961 if (s->extents[i].flat) { 1962 if (!bdrv_has_zero_init(s->extents[i].file)) { 1963 return 0; 1964 } 1965 } 1966 } 1967 return 1; 1968 } 1969 1970 static ImageInfo *vmdk_get_extent_info(VmdkExtent *extent) 1971 { 1972 ImageInfo *info = g_new0(ImageInfo, 1); 1973 1974 *info = (ImageInfo){ 1975 .filename = g_strdup(extent->file->filename), 1976 .format = g_strdup(extent->type), 1977 .virtual_size = extent->sectors * BDRV_SECTOR_SIZE, 1978 .compressed = extent->compressed, 1979 .has_compressed = extent->compressed, 1980 .cluster_size = extent->cluster_sectors * BDRV_SECTOR_SIZE, 1981 .has_cluster_size = !extent->flat, 1982 }; 1983 1984 return info; 1985 } 1986 1987 static int vmdk_check(BlockDriverState *bs, BdrvCheckResult *result, 1988 BdrvCheckMode fix) 1989 { 1990 BDRVVmdkState *s = bs->opaque; 1991 VmdkExtent *extent = NULL; 1992 int64_t sector_num = 0; 1993 int64_t total_sectors = bdrv_getlength(bs) / BDRV_SECTOR_SIZE; 1994 int ret; 1995 uint64_t cluster_offset; 1996 1997 if (fix) { 1998 return -ENOTSUP; 1999 } 2000 2001 for (;;) { 2002 if (sector_num >= total_sectors) { 2003 return 0; 2004 } 2005 extent = find_extent(s, sector_num, extent); 2006 if (!extent) { 2007 fprintf(stderr, 2008 "ERROR: could not find extent for sector %" PRId64 "\n", 2009 sector_num); 2010 break; 2011 } 2012 ret = get_cluster_offset(bs, extent, NULL, 2013 sector_num << BDRV_SECTOR_BITS, 2014 0, &cluster_offset); 2015 if (ret == VMDK_ERROR) { 2016 fprintf(stderr, 2017 "ERROR: could not get cluster_offset for sector %" 2018 PRId64 "\n", sector_num); 2019 break; 2020 } 2021 if (ret == VMDK_OK && cluster_offset >= bdrv_getlength(extent->file)) { 2022 fprintf(stderr, 2023 "ERROR: cluster offset for sector %" 2024 PRId64 " points after EOF\n", sector_num); 2025 break; 2026 } 2027 sector_num += extent->cluster_sectors; 2028 } 2029 2030 result->corruptions++; 2031 return 0; 2032 } 2033 2034 static ImageInfoSpecific *vmdk_get_specific_info(BlockDriverState *bs) 2035 { 2036 int i; 2037 BDRVVmdkState *s = bs->opaque; 2038 ImageInfoSpecific *spec_info = g_new0(ImageInfoSpecific, 1); 2039 ImageInfoList **next; 2040 2041 *spec_info = (ImageInfoSpecific){ 2042 .kind = IMAGE_INFO_SPECIFIC_KIND_VMDK, 2043 { 2044 .vmdk = g_new0(ImageInfoSpecificVmdk, 1), 2045 }, 2046 }; 2047 2048 *spec_info->vmdk = (ImageInfoSpecificVmdk) { 2049 .create_type = g_strdup(s->create_type), 2050 .cid = s->cid, 2051 .parent_cid = s->parent_cid, 2052 }; 2053 2054 next = &spec_info->vmdk->extents; 2055 for (i = 0; i < s->num_extents; i++) { 2056 *next = g_new0(ImageInfoList, 1); 2057 (*next)->value = vmdk_get_extent_info(&s->extents[i]); 2058 (*next)->next = NULL; 2059 next = &(*next)->next; 2060 } 2061 2062 return spec_info; 2063 } 2064 2065 static QEMUOptionParameter vmdk_create_options[] = { 2066 { 2067 .name = BLOCK_OPT_SIZE, 2068 .type = OPT_SIZE, 2069 .help = "Virtual disk size" 2070 }, 2071 { 2072 .name = BLOCK_OPT_ADAPTER_TYPE, 2073 .type = OPT_STRING, 2074 .help = "Virtual adapter type, can be one of " 2075 "ide (default), lsilogic, buslogic or legacyESX" 2076 }, 2077 { 2078 .name = BLOCK_OPT_BACKING_FILE, 2079 .type = OPT_STRING, 2080 .help = "File name of a base image" 2081 }, 2082 { 2083 .name = BLOCK_OPT_COMPAT6, 2084 .type = OPT_FLAG, 2085 .help = "VMDK version 6 image" 2086 }, 2087 { 2088 .name = BLOCK_OPT_SUBFMT, 2089 .type = OPT_STRING, 2090 .help = 2091 "VMDK flat extent format, can be one of " 2092 "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} " 2093 }, 2094 { 2095 .name = BLOCK_OPT_ZEROED_GRAIN, 2096 .type = OPT_FLAG, 2097 .help = "Enable efficient zero writes using the zeroed-grain GTE feature" 2098 }, 2099 { NULL } 2100 }; 2101 2102 static BlockDriver bdrv_vmdk = { 2103 .format_name = "vmdk", 2104 .instance_size = sizeof(BDRVVmdkState), 2105 .bdrv_probe = vmdk_probe, 2106 .bdrv_open = vmdk_open, 2107 .bdrv_check = vmdk_check, 2108 .bdrv_reopen_prepare = vmdk_reopen_prepare, 2109 .bdrv_read = vmdk_co_read, 2110 .bdrv_write = vmdk_co_write, 2111 .bdrv_co_write_zeroes = vmdk_co_write_zeroes, 2112 .bdrv_close = vmdk_close, 2113 .bdrv_create = vmdk_create, 2114 .bdrv_co_flush_to_disk = vmdk_co_flush, 2115 .bdrv_co_get_block_status = vmdk_co_get_block_status, 2116 .bdrv_get_allocated_file_size = vmdk_get_allocated_file_size, 2117 .bdrv_has_zero_init = vmdk_has_zero_init, 2118 .bdrv_get_specific_info = vmdk_get_specific_info, 2119 .bdrv_refresh_limits = vmdk_refresh_limits, 2120 2121 .create_options = vmdk_create_options, 2122 }; 2123 2124 static void bdrv_vmdk_init(void) 2125 { 2126 bdrv_register(&bdrv_vmdk); 2127 } 2128 2129 block_init(bdrv_vmdk_init); 2130