1 /* 2 * Block driver for Parallels disk image format 3 * 4 * Copyright (c) 2007 Alex Beregszaszi 5 * Copyright (c) 2015 Denis V. Lunev <den@openvz.org> 6 * 7 * This code was originally based on comparing different disk images created 8 * by Parallels. Currently it is based on opened OpenVZ sources 9 * available at 10 * http://git.openvz.org/?p=ploop;a=summary 11 * 12 * Permission is hereby granted, free of charge, to any person obtaining a copy 13 * of this software and associated documentation files (the "Software"), to deal 14 * in the Software without restriction, including without limitation the rights 15 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 16 * copies of the Software, and to permit persons to whom the Software is 17 * furnished to do so, subject to the following conditions: 18 * 19 * The above copyright notice and this permission notice shall be included in 20 * all copies or substantial portions of the Software. 21 * 22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 28 * THE SOFTWARE. 29 */ 30 #include "qemu-common.h" 31 #include "block/block_int.h" 32 #include "qemu/module.h" 33 #include "qemu/bitmap.h" 34 #include "qapi/util.h" 35 36 /**************************************************************/ 37 38 #define HEADER_MAGIC "WithoutFreeSpace" 39 #define HEADER_MAGIC2 "WithouFreSpacExt" 40 #define HEADER_VERSION 2 41 #define HEADER_INUSE_MAGIC (0x746F6E59) 42 43 #define DEFAULT_CLUSTER_SIZE 1048576 /* 1 MiB */ 44 45 46 // always little-endian 47 typedef struct ParallelsHeader { 48 char magic[16]; // "WithoutFreeSpace" 49 uint32_t version; 50 uint32_t heads; 51 uint32_t cylinders; 52 uint32_t tracks; 53 uint32_t bat_entries; 54 uint64_t nb_sectors; 55 uint32_t inuse; 56 uint32_t data_off; 57 char padding[12]; 58 } QEMU_PACKED ParallelsHeader; 59 60 61 typedef enum ParallelsPreallocMode { 62 PRL_PREALLOC_MODE_FALLOCATE = 0, 63 PRL_PREALLOC_MODE_TRUNCATE = 1, 64 PRL_PREALLOC_MODE_MAX = 2, 65 } ParallelsPreallocMode; 66 67 static const char *prealloc_mode_lookup[] = { 68 "falloc", 69 "truncate", 70 NULL, 71 }; 72 73 74 typedef struct BDRVParallelsState { 75 /** Locking is conservative, the lock protects 76 * - image file extending (truncate, fallocate) 77 * - any access to block allocation table 78 */ 79 CoMutex lock; 80 81 ParallelsHeader *header; 82 uint32_t header_size; 83 bool header_unclean; 84 85 unsigned long *bat_dirty_bmap; 86 unsigned int bat_dirty_block; 87 88 uint32_t *bat_bitmap; 89 unsigned int bat_size; 90 91 int64_t data_end; 92 uint64_t prealloc_size; 93 ParallelsPreallocMode prealloc_mode; 94 95 unsigned int tracks; 96 97 unsigned int off_multiplier; 98 } BDRVParallelsState; 99 100 101 #define PARALLELS_OPT_PREALLOC_MODE "prealloc-mode" 102 #define PARALLELS_OPT_PREALLOC_SIZE "prealloc-size" 103 104 static QemuOptsList parallels_runtime_opts = { 105 .name = "parallels", 106 .head = QTAILQ_HEAD_INITIALIZER(parallels_runtime_opts.head), 107 .desc = { 108 { 109 .name = PARALLELS_OPT_PREALLOC_SIZE, 110 .type = QEMU_OPT_SIZE, 111 .help = "Preallocation size on image expansion", 112 .def_value_str = "128MiB", 113 }, 114 { 115 .name = PARALLELS_OPT_PREALLOC_MODE, 116 .type = QEMU_OPT_STRING, 117 .help = "Preallocation mode on image expansion " 118 "(allowed values: falloc, truncate)", 119 .def_value_str = "falloc", 120 }, 121 { /* end of list */ }, 122 }, 123 }; 124 125 126 static int64_t bat2sect(BDRVParallelsState *s, uint32_t idx) 127 { 128 return (uint64_t)le32_to_cpu(s->bat_bitmap[idx]) * s->off_multiplier; 129 } 130 131 static uint32_t bat_entry_off(uint32_t idx) 132 { 133 return sizeof(ParallelsHeader) + sizeof(uint32_t) * idx; 134 } 135 136 static int64_t seek_to_sector(BDRVParallelsState *s, int64_t sector_num) 137 { 138 uint32_t index, offset; 139 140 index = sector_num / s->tracks; 141 offset = sector_num % s->tracks; 142 143 /* not allocated */ 144 if ((index >= s->bat_size) || (s->bat_bitmap[index] == 0)) { 145 return -1; 146 } 147 return bat2sect(s, index) + offset; 148 } 149 150 static int cluster_remainder(BDRVParallelsState *s, int64_t sector_num, 151 int nb_sectors) 152 { 153 int ret = s->tracks - sector_num % s->tracks; 154 return MIN(nb_sectors, ret); 155 } 156 157 static int64_t block_status(BDRVParallelsState *s, int64_t sector_num, 158 int nb_sectors, int *pnum) 159 { 160 int64_t start_off = -2, prev_end_off = -2; 161 162 *pnum = 0; 163 while (nb_sectors > 0 || start_off == -2) { 164 int64_t offset = seek_to_sector(s, sector_num); 165 int to_end; 166 167 if (start_off == -2) { 168 start_off = offset; 169 prev_end_off = offset; 170 } else if (offset != prev_end_off) { 171 break; 172 } 173 174 to_end = cluster_remainder(s, sector_num, nb_sectors); 175 nb_sectors -= to_end; 176 sector_num += to_end; 177 *pnum += to_end; 178 179 if (offset > 0) { 180 prev_end_off += to_end; 181 } 182 } 183 return start_off; 184 } 185 186 static int64_t allocate_clusters(BlockDriverState *bs, int64_t sector_num, 187 int nb_sectors, int *pnum) 188 { 189 BDRVParallelsState *s = bs->opaque; 190 uint32_t idx, to_allocate, i; 191 int64_t pos, space; 192 193 pos = block_status(s, sector_num, nb_sectors, pnum); 194 if (pos > 0) { 195 return pos; 196 } 197 198 idx = sector_num / s->tracks; 199 if (idx >= s->bat_size) { 200 return -EINVAL; 201 } 202 203 to_allocate = (sector_num + *pnum + s->tracks - 1) / s->tracks - idx; 204 space = to_allocate * s->tracks; 205 if (s->data_end + space > bdrv_getlength(bs->file) >> BDRV_SECTOR_BITS) { 206 int ret; 207 space += s->prealloc_size; 208 if (s->prealloc_mode == PRL_PREALLOC_MODE_FALLOCATE) { 209 ret = bdrv_write_zeroes(bs->file, s->data_end, space, 0); 210 } else { 211 ret = bdrv_truncate(bs->file, 212 (s->data_end + space) << BDRV_SECTOR_BITS); 213 } 214 if (ret < 0) { 215 return ret; 216 } 217 } 218 219 for (i = 0; i < to_allocate; i++) { 220 s->bat_bitmap[idx + i] = cpu_to_le32(s->data_end / s->off_multiplier); 221 s->data_end += s->tracks; 222 bitmap_set(s->bat_dirty_bmap, 223 bat_entry_off(idx) / s->bat_dirty_block, 1); 224 } 225 226 return bat2sect(s, idx) + sector_num % s->tracks; 227 } 228 229 230 static coroutine_fn int parallels_co_flush_to_os(BlockDriverState *bs) 231 { 232 BDRVParallelsState *s = bs->opaque; 233 unsigned long size = DIV_ROUND_UP(s->header_size, s->bat_dirty_block); 234 unsigned long bit; 235 236 qemu_co_mutex_lock(&s->lock); 237 238 bit = find_first_bit(s->bat_dirty_bmap, size); 239 while (bit < size) { 240 uint32_t off = bit * s->bat_dirty_block; 241 uint32_t to_write = s->bat_dirty_block; 242 int ret; 243 244 if (off + to_write > s->header_size) { 245 to_write = s->header_size - off; 246 } 247 ret = bdrv_pwrite(bs->file, off, (uint8_t *)s->header + off, to_write); 248 if (ret < 0) { 249 qemu_co_mutex_unlock(&s->lock); 250 return ret; 251 } 252 bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1); 253 } 254 bitmap_zero(s->bat_dirty_bmap, size); 255 256 qemu_co_mutex_unlock(&s->lock); 257 return 0; 258 } 259 260 261 static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs, 262 int64_t sector_num, int nb_sectors, int *pnum) 263 { 264 BDRVParallelsState *s = bs->opaque; 265 int64_t offset; 266 267 qemu_co_mutex_lock(&s->lock); 268 offset = block_status(s, sector_num, nb_sectors, pnum); 269 qemu_co_mutex_unlock(&s->lock); 270 271 if (offset < 0) { 272 return 0; 273 } 274 275 return (offset << BDRV_SECTOR_BITS) | 276 BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; 277 } 278 279 static coroutine_fn int parallels_co_writev(BlockDriverState *bs, 280 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) 281 { 282 BDRVParallelsState *s = bs->opaque; 283 uint64_t bytes_done = 0; 284 QEMUIOVector hd_qiov; 285 int ret = 0; 286 287 qemu_iovec_init(&hd_qiov, qiov->niov); 288 289 while (nb_sectors > 0) { 290 int64_t position; 291 int n, nbytes; 292 293 qemu_co_mutex_lock(&s->lock); 294 position = allocate_clusters(bs, sector_num, nb_sectors, &n); 295 qemu_co_mutex_unlock(&s->lock); 296 if (position < 0) { 297 ret = (int)position; 298 break; 299 } 300 301 nbytes = n << BDRV_SECTOR_BITS; 302 303 qemu_iovec_reset(&hd_qiov); 304 qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 305 306 ret = bdrv_co_writev(bs->file, position, n, &hd_qiov); 307 if (ret < 0) { 308 break; 309 } 310 311 nb_sectors -= n; 312 sector_num += n; 313 bytes_done += nbytes; 314 } 315 316 qemu_iovec_destroy(&hd_qiov); 317 return ret; 318 } 319 320 static coroutine_fn int parallels_co_readv(BlockDriverState *bs, 321 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) 322 { 323 BDRVParallelsState *s = bs->opaque; 324 uint64_t bytes_done = 0; 325 QEMUIOVector hd_qiov; 326 int ret = 0; 327 328 qemu_iovec_init(&hd_qiov, qiov->niov); 329 330 while (nb_sectors > 0) { 331 int64_t position; 332 int n, nbytes; 333 334 qemu_co_mutex_lock(&s->lock); 335 position = block_status(s, sector_num, nb_sectors, &n); 336 qemu_co_mutex_unlock(&s->lock); 337 338 nbytes = n << BDRV_SECTOR_BITS; 339 340 if (position < 0) { 341 qemu_iovec_memset(qiov, bytes_done, 0, nbytes); 342 } else { 343 qemu_iovec_reset(&hd_qiov); 344 qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 345 346 ret = bdrv_co_readv(bs->file, position, n, &hd_qiov); 347 if (ret < 0) { 348 break; 349 } 350 } 351 352 nb_sectors -= n; 353 sector_num += n; 354 bytes_done += nbytes; 355 } 356 357 qemu_iovec_destroy(&hd_qiov); 358 return ret; 359 } 360 361 362 static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res, 363 BdrvCheckMode fix) 364 { 365 BDRVParallelsState *s = bs->opaque; 366 int64_t size, prev_off, high_off; 367 int ret; 368 uint32_t i; 369 bool flush_bat = false; 370 int cluster_size = s->tracks << BDRV_SECTOR_BITS; 371 372 size = bdrv_getlength(bs->file); 373 if (size < 0) { 374 res->check_errors++; 375 return size; 376 } 377 378 if (s->header_unclean) { 379 fprintf(stderr, "%s image was not closed correctly\n", 380 fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR"); 381 res->corruptions++; 382 if (fix & BDRV_FIX_ERRORS) { 383 /* parallels_close will do the job right */ 384 res->corruptions_fixed++; 385 s->header_unclean = false; 386 } 387 } 388 389 res->bfi.total_clusters = s->bat_size; 390 res->bfi.compressed_clusters = 0; /* compression is not supported */ 391 392 high_off = 0; 393 prev_off = 0; 394 for (i = 0; i < s->bat_size; i++) { 395 int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS; 396 if (off == 0) { 397 prev_off = 0; 398 continue; 399 } 400 401 /* cluster outside the image */ 402 if (off > size) { 403 fprintf(stderr, "%s cluster %u is outside image\n", 404 fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); 405 res->corruptions++; 406 if (fix & BDRV_FIX_ERRORS) { 407 prev_off = 0; 408 s->bat_bitmap[i] = 0; 409 res->corruptions_fixed++; 410 flush_bat = true; 411 continue; 412 } 413 } 414 415 res->bfi.allocated_clusters++; 416 if (off > high_off) { 417 high_off = off; 418 } 419 420 if (prev_off != 0 && (prev_off + cluster_size) != off) { 421 res->bfi.fragmented_clusters++; 422 } 423 prev_off = off; 424 } 425 426 if (flush_bat) { 427 ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size); 428 if (ret < 0) { 429 res->check_errors++; 430 return ret; 431 } 432 } 433 434 res->image_end_offset = high_off + cluster_size; 435 if (size > res->image_end_offset) { 436 int64_t count; 437 count = DIV_ROUND_UP(size - res->image_end_offset, cluster_size); 438 fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n", 439 fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR", 440 size - res->image_end_offset); 441 res->leaks += count; 442 if (fix & BDRV_FIX_LEAKS) { 443 ret = bdrv_truncate(bs->file, res->image_end_offset); 444 if (ret < 0) { 445 res->check_errors++; 446 return ret; 447 } 448 res->leaks_fixed += count; 449 } 450 } 451 452 return 0; 453 } 454 455 456 static int parallels_create(const char *filename, QemuOpts *opts, Error **errp) 457 { 458 int64_t total_size, cl_size; 459 uint8_t tmp[BDRV_SECTOR_SIZE]; 460 Error *local_err = NULL; 461 BlockDriverState *file; 462 uint32_t bat_entries, bat_sectors; 463 ParallelsHeader header; 464 int ret; 465 466 total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), 467 BDRV_SECTOR_SIZE); 468 cl_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 469 DEFAULT_CLUSTER_SIZE), BDRV_SECTOR_SIZE); 470 471 ret = bdrv_create_file(filename, opts, &local_err); 472 if (ret < 0) { 473 error_propagate(errp, local_err); 474 return ret; 475 } 476 477 file = NULL; 478 ret = bdrv_open(&file, filename, NULL, NULL, 479 BDRV_O_RDWR | BDRV_O_PROTOCOL, NULL, &local_err); 480 if (ret < 0) { 481 error_propagate(errp, local_err); 482 return ret; 483 } 484 ret = bdrv_truncate(file, 0); 485 if (ret < 0) { 486 goto exit; 487 } 488 489 bat_entries = DIV_ROUND_UP(total_size, cl_size); 490 bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); 491 bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; 492 493 memset(&header, 0, sizeof(header)); 494 memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); 495 header.version = cpu_to_le32(HEADER_VERSION); 496 /* don't care much about geometry, it is not used on image level */ 497 header.heads = cpu_to_le32(16); 498 header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE / 16 / 32); 499 header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); 500 header.bat_entries = cpu_to_le32(bat_entries); 501 header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); 502 header.data_off = cpu_to_le32(bat_sectors); 503 504 /* write all the data */ 505 memset(tmp, 0, sizeof(tmp)); 506 memcpy(tmp, &header, sizeof(header)); 507 508 ret = bdrv_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE); 509 if (ret < 0) { 510 goto exit; 511 } 512 ret = bdrv_write_zeroes(file, 1, bat_sectors - 1, 0); 513 if (ret < 0) { 514 goto exit; 515 } 516 ret = 0; 517 518 done: 519 bdrv_unref(file); 520 return ret; 521 522 exit: 523 error_setg_errno(errp, -ret, "Failed to create Parallels image"); 524 goto done; 525 } 526 527 528 static int parallels_probe(const uint8_t *buf, int buf_size, 529 const char *filename) 530 { 531 const ParallelsHeader *ph = (const void *)buf; 532 533 if (buf_size < sizeof(ParallelsHeader)) { 534 return 0; 535 } 536 537 if ((!memcmp(ph->magic, HEADER_MAGIC, 16) || 538 !memcmp(ph->magic, HEADER_MAGIC2, 16)) && 539 (le32_to_cpu(ph->version) == HEADER_VERSION)) { 540 return 100; 541 } 542 543 return 0; 544 } 545 546 static int parallels_update_header(BlockDriverState *bs) 547 { 548 BDRVParallelsState *s = bs->opaque; 549 unsigned size = MAX(bdrv_opt_mem_align(bs->file), sizeof(ParallelsHeader)); 550 551 if (size > s->header_size) { 552 size = s->header_size; 553 } 554 return bdrv_pwrite_sync(bs->file, 0, s->header, size); 555 } 556 557 static int parallels_open(BlockDriverState *bs, QDict *options, int flags, 558 Error **errp) 559 { 560 BDRVParallelsState *s = bs->opaque; 561 ParallelsHeader ph; 562 int ret, size, i; 563 QemuOpts *opts = NULL; 564 Error *local_err = NULL; 565 char *buf; 566 567 ret = bdrv_pread(bs->file, 0, &ph, sizeof(ph)); 568 if (ret < 0) { 569 goto fail; 570 } 571 572 bs->total_sectors = le64_to_cpu(ph.nb_sectors); 573 574 if (le32_to_cpu(ph.version) != HEADER_VERSION) { 575 goto fail_format; 576 } 577 if (!memcmp(ph.magic, HEADER_MAGIC, 16)) { 578 s->off_multiplier = 1; 579 bs->total_sectors = 0xffffffff & bs->total_sectors; 580 } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) { 581 s->off_multiplier = le32_to_cpu(ph.tracks); 582 } else { 583 goto fail_format; 584 } 585 586 s->tracks = le32_to_cpu(ph.tracks); 587 if (s->tracks == 0) { 588 error_setg(errp, "Invalid image: Zero sectors per track"); 589 ret = -EINVAL; 590 goto fail; 591 } 592 if (s->tracks > INT32_MAX/513) { 593 error_setg(errp, "Invalid image: Too big cluster"); 594 ret = -EFBIG; 595 goto fail; 596 } 597 598 s->bat_size = le32_to_cpu(ph.bat_entries); 599 if (s->bat_size > INT_MAX / sizeof(uint32_t)) { 600 error_setg(errp, "Catalog too large"); 601 ret = -EFBIG; 602 goto fail; 603 } 604 605 size = bat_entry_off(s->bat_size); 606 s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file)); 607 s->header = qemu_try_blockalign(bs->file, s->header_size); 608 if (s->header == NULL) { 609 ret = -ENOMEM; 610 goto fail; 611 } 612 s->data_end = le32_to_cpu(ph.data_off); 613 if (s->data_end == 0) { 614 s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE); 615 } 616 if (s->data_end < s->header_size) { 617 /* there is not enough unused space to fit to block align between BAT 618 and actual data. We can't avoid read-modify-write... */ 619 s->header_size = size; 620 } 621 622 ret = bdrv_pread(bs->file, 0, s->header, s->header_size); 623 if (ret < 0) { 624 goto fail; 625 } 626 s->bat_bitmap = (uint32_t *)(s->header + 1); 627 628 for (i = 0; i < s->bat_size; i++) { 629 int64_t off = bat2sect(s, i); 630 if (off >= s->data_end) { 631 s->data_end = off + s->tracks; 632 } 633 } 634 635 if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) { 636 /* Image was not closed correctly. The check is mandatory */ 637 s->header_unclean = true; 638 if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) { 639 error_setg(errp, "parallels: Image was not closed correctly; " 640 "cannot be opened read/write"); 641 ret = -EACCES; 642 goto fail; 643 } 644 } 645 646 opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, &local_err); 647 if (local_err != NULL) { 648 goto fail_options; 649 } 650 651 qemu_opts_absorb_qdict(opts, options, &local_err); 652 if (local_err != NULL) { 653 goto fail_options; 654 } 655 656 s->prealloc_size = 657 qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0); 658 s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS); 659 buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); 660 s->prealloc_mode = qapi_enum_parse(prealloc_mode_lookup, buf, 661 PRL_PREALLOC_MODE_MAX, PRL_PREALLOC_MODE_FALLOCATE, &local_err); 662 g_free(buf); 663 if (local_err != NULL) { 664 goto fail_options; 665 } 666 if (!bdrv_has_zero_init(bs->file) || 667 bdrv_truncate(bs->file, bdrv_getlength(bs->file)) != 0) { 668 s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE; 669 } 670 671 if (flags & BDRV_O_RDWR) { 672 s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC); 673 ret = parallels_update_header(bs); 674 if (ret < 0) { 675 goto fail; 676 } 677 } 678 679 s->bat_dirty_block = 4 * getpagesize(); 680 s->bat_dirty_bmap = 681 bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block)); 682 683 qemu_co_mutex_init(&s->lock); 684 return 0; 685 686 fail_format: 687 error_setg(errp, "Image not in Parallels format"); 688 ret = -EINVAL; 689 fail: 690 qemu_vfree(s->header); 691 return ret; 692 693 fail_options: 694 error_propagate(errp, local_err); 695 ret = -EINVAL; 696 goto fail; 697 } 698 699 700 static void parallels_close(BlockDriverState *bs) 701 { 702 BDRVParallelsState *s = bs->opaque; 703 704 if (bs->open_flags & BDRV_O_RDWR) { 705 s->header->inuse = 0; 706 parallels_update_header(bs); 707 } 708 709 if (bs->open_flags & BDRV_O_RDWR) { 710 bdrv_truncate(bs->file, s->data_end << BDRV_SECTOR_BITS); 711 } 712 713 g_free(s->bat_dirty_bmap); 714 qemu_vfree(s->header); 715 } 716 717 static QemuOptsList parallels_create_opts = { 718 .name = "parallels-create-opts", 719 .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head), 720 .desc = { 721 { 722 .name = BLOCK_OPT_SIZE, 723 .type = QEMU_OPT_SIZE, 724 .help = "Virtual disk size", 725 }, 726 { 727 .name = BLOCK_OPT_CLUSTER_SIZE, 728 .type = QEMU_OPT_SIZE, 729 .help = "Parallels image cluster size", 730 .def_value_str = stringify(DEFAULT_CLUSTER_SIZE), 731 }, 732 { /* end of list */ } 733 } 734 }; 735 736 static BlockDriver bdrv_parallels = { 737 .format_name = "parallels", 738 .instance_size = sizeof(BDRVParallelsState), 739 .bdrv_probe = parallels_probe, 740 .bdrv_open = parallels_open, 741 .bdrv_close = parallels_close, 742 .bdrv_co_get_block_status = parallels_co_get_block_status, 743 .bdrv_has_zero_init = bdrv_has_zero_init_1, 744 .bdrv_co_flush_to_os = parallels_co_flush_to_os, 745 .bdrv_co_readv = parallels_co_readv, 746 .bdrv_co_writev = parallels_co_writev, 747 748 .bdrv_create = parallels_create, 749 .bdrv_check = parallels_check, 750 .create_opts = ¶llels_create_opts, 751 }; 752 753 static void bdrv_parallels_init(void) 754 { 755 bdrv_register(&bdrv_parallels); 756 } 757 758 block_init(bdrv_parallels_init); 759