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->bs) >> 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->bs, s->data_end, space, 0); 210 } else { 211 ret = bdrv_truncate(bs->file->bs, 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->bs, off, (uint8_t *)s->header + off, 248 to_write); 249 if (ret < 0) { 250 qemu_co_mutex_unlock(&s->lock); 251 return ret; 252 } 253 bit = find_next_bit(s->bat_dirty_bmap, size, bit + 1); 254 } 255 bitmap_zero(s->bat_dirty_bmap, size); 256 257 qemu_co_mutex_unlock(&s->lock); 258 return 0; 259 } 260 261 262 static int64_t coroutine_fn parallels_co_get_block_status(BlockDriverState *bs, 263 int64_t sector_num, int nb_sectors, int *pnum) 264 { 265 BDRVParallelsState *s = bs->opaque; 266 int64_t offset; 267 268 qemu_co_mutex_lock(&s->lock); 269 offset = block_status(s, sector_num, nb_sectors, pnum); 270 qemu_co_mutex_unlock(&s->lock); 271 272 if (offset < 0) { 273 return 0; 274 } 275 276 return (offset << BDRV_SECTOR_BITS) | 277 BDRV_BLOCK_DATA | BDRV_BLOCK_OFFSET_VALID; 278 } 279 280 static coroutine_fn int parallels_co_writev(BlockDriverState *bs, 281 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) 282 { 283 BDRVParallelsState *s = bs->opaque; 284 uint64_t bytes_done = 0; 285 QEMUIOVector hd_qiov; 286 int ret = 0; 287 288 qemu_iovec_init(&hd_qiov, qiov->niov); 289 290 while (nb_sectors > 0) { 291 int64_t position; 292 int n, nbytes; 293 294 qemu_co_mutex_lock(&s->lock); 295 position = allocate_clusters(bs, sector_num, nb_sectors, &n); 296 qemu_co_mutex_unlock(&s->lock); 297 if (position < 0) { 298 ret = (int)position; 299 break; 300 } 301 302 nbytes = n << BDRV_SECTOR_BITS; 303 304 qemu_iovec_reset(&hd_qiov); 305 qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 306 307 ret = bdrv_co_writev(bs->file->bs, position, n, &hd_qiov); 308 if (ret < 0) { 309 break; 310 } 311 312 nb_sectors -= n; 313 sector_num += n; 314 bytes_done += nbytes; 315 } 316 317 qemu_iovec_destroy(&hd_qiov); 318 return ret; 319 } 320 321 static coroutine_fn int parallels_co_readv(BlockDriverState *bs, 322 int64_t sector_num, int nb_sectors, QEMUIOVector *qiov) 323 { 324 BDRVParallelsState *s = bs->opaque; 325 uint64_t bytes_done = 0; 326 QEMUIOVector hd_qiov; 327 int ret = 0; 328 329 qemu_iovec_init(&hd_qiov, qiov->niov); 330 331 while (nb_sectors > 0) { 332 int64_t position; 333 int n, nbytes; 334 335 qemu_co_mutex_lock(&s->lock); 336 position = block_status(s, sector_num, nb_sectors, &n); 337 qemu_co_mutex_unlock(&s->lock); 338 339 nbytes = n << BDRV_SECTOR_BITS; 340 341 if (position < 0) { 342 qemu_iovec_memset(qiov, bytes_done, 0, nbytes); 343 } else { 344 qemu_iovec_reset(&hd_qiov); 345 qemu_iovec_concat(&hd_qiov, qiov, bytes_done, nbytes); 346 347 ret = bdrv_co_readv(bs->file->bs, position, n, &hd_qiov); 348 if (ret < 0) { 349 break; 350 } 351 } 352 353 nb_sectors -= n; 354 sector_num += n; 355 bytes_done += nbytes; 356 } 357 358 qemu_iovec_destroy(&hd_qiov); 359 return ret; 360 } 361 362 363 static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res, 364 BdrvCheckMode fix) 365 { 366 BDRVParallelsState *s = bs->opaque; 367 int64_t size, prev_off, high_off; 368 int ret; 369 uint32_t i; 370 bool flush_bat = false; 371 int cluster_size = s->tracks << BDRV_SECTOR_BITS; 372 373 size = bdrv_getlength(bs->file->bs); 374 if (size < 0) { 375 res->check_errors++; 376 return size; 377 } 378 379 if (s->header_unclean) { 380 fprintf(stderr, "%s image was not closed correctly\n", 381 fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR"); 382 res->corruptions++; 383 if (fix & BDRV_FIX_ERRORS) { 384 /* parallels_close will do the job right */ 385 res->corruptions_fixed++; 386 s->header_unclean = false; 387 } 388 } 389 390 res->bfi.total_clusters = s->bat_size; 391 res->bfi.compressed_clusters = 0; /* compression is not supported */ 392 393 high_off = 0; 394 prev_off = 0; 395 for (i = 0; i < s->bat_size; i++) { 396 int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS; 397 if (off == 0) { 398 prev_off = 0; 399 continue; 400 } 401 402 /* cluster outside the image */ 403 if (off > size) { 404 fprintf(stderr, "%s cluster %u is outside image\n", 405 fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i); 406 res->corruptions++; 407 if (fix & BDRV_FIX_ERRORS) { 408 prev_off = 0; 409 s->bat_bitmap[i] = 0; 410 res->corruptions_fixed++; 411 flush_bat = true; 412 continue; 413 } 414 } 415 416 res->bfi.allocated_clusters++; 417 if (off > high_off) { 418 high_off = off; 419 } 420 421 if (prev_off != 0 && (prev_off + cluster_size) != off) { 422 res->bfi.fragmented_clusters++; 423 } 424 prev_off = off; 425 } 426 427 if (flush_bat) { 428 ret = bdrv_pwrite_sync(bs->file->bs, 0, s->header, s->header_size); 429 if (ret < 0) { 430 res->check_errors++; 431 return ret; 432 } 433 } 434 435 res->image_end_offset = high_off + cluster_size; 436 if (size > res->image_end_offset) { 437 int64_t count; 438 count = DIV_ROUND_UP(size - res->image_end_offset, cluster_size); 439 fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n", 440 fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR", 441 size - res->image_end_offset); 442 res->leaks += count; 443 if (fix & BDRV_FIX_LEAKS) { 444 ret = bdrv_truncate(bs->file->bs, res->image_end_offset); 445 if (ret < 0) { 446 res->check_errors++; 447 return ret; 448 } 449 res->leaks_fixed += count; 450 } 451 } 452 453 return 0; 454 } 455 456 457 static int parallels_create(const char *filename, QemuOpts *opts, Error **errp) 458 { 459 int64_t total_size, cl_size; 460 uint8_t tmp[BDRV_SECTOR_SIZE]; 461 Error *local_err = NULL; 462 BlockDriverState *file; 463 uint32_t bat_entries, bat_sectors; 464 ParallelsHeader header; 465 int ret; 466 467 total_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0), 468 BDRV_SECTOR_SIZE); 469 cl_size = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_CLUSTER_SIZE, 470 DEFAULT_CLUSTER_SIZE), BDRV_SECTOR_SIZE); 471 472 ret = bdrv_create_file(filename, opts, &local_err); 473 if (ret < 0) { 474 error_propagate(errp, local_err); 475 return ret; 476 } 477 478 file = NULL; 479 ret = bdrv_open(&file, filename, NULL, NULL, 480 BDRV_O_RDWR | BDRV_O_PROTOCOL, &local_err); 481 if (ret < 0) { 482 error_propagate(errp, local_err); 483 return ret; 484 } 485 ret = bdrv_truncate(file, 0); 486 if (ret < 0) { 487 goto exit; 488 } 489 490 bat_entries = DIV_ROUND_UP(total_size, cl_size); 491 bat_sectors = DIV_ROUND_UP(bat_entry_off(bat_entries), cl_size); 492 bat_sectors = (bat_sectors * cl_size) >> BDRV_SECTOR_BITS; 493 494 memset(&header, 0, sizeof(header)); 495 memcpy(header.magic, HEADER_MAGIC2, sizeof(header.magic)); 496 header.version = cpu_to_le32(HEADER_VERSION); 497 /* don't care much about geometry, it is not used on image level */ 498 header.heads = cpu_to_le32(16); 499 header.cylinders = cpu_to_le32(total_size / BDRV_SECTOR_SIZE / 16 / 32); 500 header.tracks = cpu_to_le32(cl_size >> BDRV_SECTOR_BITS); 501 header.bat_entries = cpu_to_le32(bat_entries); 502 header.nb_sectors = cpu_to_le64(DIV_ROUND_UP(total_size, BDRV_SECTOR_SIZE)); 503 header.data_off = cpu_to_le32(bat_sectors); 504 505 /* write all the data */ 506 memset(tmp, 0, sizeof(tmp)); 507 memcpy(tmp, &header, sizeof(header)); 508 509 ret = bdrv_pwrite(file, 0, tmp, BDRV_SECTOR_SIZE); 510 if (ret < 0) { 511 goto exit; 512 } 513 ret = bdrv_write_zeroes(file, 1, bat_sectors - 1, 0); 514 if (ret < 0) { 515 goto exit; 516 } 517 ret = 0; 518 519 done: 520 bdrv_unref(file); 521 return ret; 522 523 exit: 524 error_setg_errno(errp, -ret, "Failed to create Parallels image"); 525 goto done; 526 } 527 528 529 static int parallels_probe(const uint8_t *buf, int buf_size, 530 const char *filename) 531 { 532 const ParallelsHeader *ph = (const void *)buf; 533 534 if (buf_size < sizeof(ParallelsHeader)) { 535 return 0; 536 } 537 538 if ((!memcmp(ph->magic, HEADER_MAGIC, 16) || 539 !memcmp(ph->magic, HEADER_MAGIC2, 16)) && 540 (le32_to_cpu(ph->version) == HEADER_VERSION)) { 541 return 100; 542 } 543 544 return 0; 545 } 546 547 static int parallels_update_header(BlockDriverState *bs) 548 { 549 BDRVParallelsState *s = bs->opaque; 550 unsigned size = MAX(bdrv_opt_mem_align(bs->file->bs), 551 sizeof(ParallelsHeader)); 552 553 if (size > s->header_size) { 554 size = s->header_size; 555 } 556 return bdrv_pwrite_sync(bs->file->bs, 0, s->header, size); 557 } 558 559 static int parallels_open(BlockDriverState *bs, QDict *options, int flags, 560 Error **errp) 561 { 562 BDRVParallelsState *s = bs->opaque; 563 ParallelsHeader ph; 564 int ret, size, i; 565 QemuOpts *opts = NULL; 566 Error *local_err = NULL; 567 char *buf; 568 569 ret = bdrv_pread(bs->file->bs, 0, &ph, sizeof(ph)); 570 if (ret < 0) { 571 goto fail; 572 } 573 574 bs->total_sectors = le64_to_cpu(ph.nb_sectors); 575 576 if (le32_to_cpu(ph.version) != HEADER_VERSION) { 577 goto fail_format; 578 } 579 if (!memcmp(ph.magic, HEADER_MAGIC, 16)) { 580 s->off_multiplier = 1; 581 bs->total_sectors = 0xffffffff & bs->total_sectors; 582 } else if (!memcmp(ph.magic, HEADER_MAGIC2, 16)) { 583 s->off_multiplier = le32_to_cpu(ph.tracks); 584 } else { 585 goto fail_format; 586 } 587 588 s->tracks = le32_to_cpu(ph.tracks); 589 if (s->tracks == 0) { 590 error_setg(errp, "Invalid image: Zero sectors per track"); 591 ret = -EINVAL; 592 goto fail; 593 } 594 if (s->tracks > INT32_MAX/513) { 595 error_setg(errp, "Invalid image: Too big cluster"); 596 ret = -EFBIG; 597 goto fail; 598 } 599 600 s->bat_size = le32_to_cpu(ph.bat_entries); 601 if (s->bat_size > INT_MAX / sizeof(uint32_t)) { 602 error_setg(errp, "Catalog too large"); 603 ret = -EFBIG; 604 goto fail; 605 } 606 607 size = bat_entry_off(s->bat_size); 608 s->header_size = ROUND_UP(size, bdrv_opt_mem_align(bs->file->bs)); 609 s->header = qemu_try_blockalign(bs->file->bs, s->header_size); 610 if (s->header == NULL) { 611 ret = -ENOMEM; 612 goto fail; 613 } 614 s->data_end = le32_to_cpu(ph.data_off); 615 if (s->data_end == 0) { 616 s->data_end = ROUND_UP(bat_entry_off(s->bat_size), BDRV_SECTOR_SIZE); 617 } 618 if (s->data_end < s->header_size) { 619 /* there is not enough unused space to fit to block align between BAT 620 and actual data. We can't avoid read-modify-write... */ 621 s->header_size = size; 622 } 623 624 ret = bdrv_pread(bs->file->bs, 0, s->header, s->header_size); 625 if (ret < 0) { 626 goto fail; 627 } 628 s->bat_bitmap = (uint32_t *)(s->header + 1); 629 630 for (i = 0; i < s->bat_size; i++) { 631 int64_t off = bat2sect(s, i); 632 if (off >= s->data_end) { 633 s->data_end = off + s->tracks; 634 } 635 } 636 637 if (le32_to_cpu(ph.inuse) == HEADER_INUSE_MAGIC) { 638 /* Image was not closed correctly. The check is mandatory */ 639 s->header_unclean = true; 640 if ((flags & BDRV_O_RDWR) && !(flags & BDRV_O_CHECK)) { 641 error_setg(errp, "parallels: Image was not closed correctly; " 642 "cannot be opened read/write"); 643 ret = -EACCES; 644 goto fail; 645 } 646 } 647 648 opts = qemu_opts_create(¶llels_runtime_opts, NULL, 0, &local_err); 649 if (local_err != NULL) { 650 goto fail_options; 651 } 652 653 qemu_opts_absorb_qdict(opts, options, &local_err); 654 if (local_err != NULL) { 655 goto fail_options; 656 } 657 658 s->prealloc_size = 659 qemu_opt_get_size_del(opts, PARALLELS_OPT_PREALLOC_SIZE, 0); 660 s->prealloc_size = MAX(s->tracks, s->prealloc_size >> BDRV_SECTOR_BITS); 661 buf = qemu_opt_get_del(opts, PARALLELS_OPT_PREALLOC_MODE); 662 s->prealloc_mode = qapi_enum_parse(prealloc_mode_lookup, buf, 663 PRL_PREALLOC_MODE_MAX, PRL_PREALLOC_MODE_FALLOCATE, &local_err); 664 g_free(buf); 665 if (local_err != NULL) { 666 goto fail_options; 667 } 668 if (!bdrv_has_zero_init(bs->file->bs) || 669 bdrv_truncate(bs->file->bs, bdrv_getlength(bs->file->bs)) != 0) { 670 s->prealloc_mode = PRL_PREALLOC_MODE_FALLOCATE; 671 } 672 673 if (flags & BDRV_O_RDWR) { 674 s->header->inuse = cpu_to_le32(HEADER_INUSE_MAGIC); 675 ret = parallels_update_header(bs); 676 if (ret < 0) { 677 goto fail; 678 } 679 } 680 681 s->bat_dirty_block = 4 * getpagesize(); 682 s->bat_dirty_bmap = 683 bitmap_new(DIV_ROUND_UP(s->header_size, s->bat_dirty_block)); 684 685 qemu_co_mutex_init(&s->lock); 686 return 0; 687 688 fail_format: 689 error_setg(errp, "Image not in Parallels format"); 690 ret = -EINVAL; 691 fail: 692 qemu_vfree(s->header); 693 return ret; 694 695 fail_options: 696 error_propagate(errp, local_err); 697 ret = -EINVAL; 698 goto fail; 699 } 700 701 702 static void parallels_close(BlockDriverState *bs) 703 { 704 BDRVParallelsState *s = bs->opaque; 705 706 if (bs->open_flags & BDRV_O_RDWR) { 707 s->header->inuse = 0; 708 parallels_update_header(bs); 709 } 710 711 if (bs->open_flags & BDRV_O_RDWR) { 712 bdrv_truncate(bs->file->bs, s->data_end << BDRV_SECTOR_BITS); 713 } 714 715 g_free(s->bat_dirty_bmap); 716 qemu_vfree(s->header); 717 } 718 719 static QemuOptsList parallels_create_opts = { 720 .name = "parallels-create-opts", 721 .head = QTAILQ_HEAD_INITIALIZER(parallels_create_opts.head), 722 .desc = { 723 { 724 .name = BLOCK_OPT_SIZE, 725 .type = QEMU_OPT_SIZE, 726 .help = "Virtual disk size", 727 }, 728 { 729 .name = BLOCK_OPT_CLUSTER_SIZE, 730 .type = QEMU_OPT_SIZE, 731 .help = "Parallels image cluster size", 732 .def_value_str = stringify(DEFAULT_CLUSTER_SIZE), 733 }, 734 { /* end of list */ } 735 } 736 }; 737 738 static BlockDriver bdrv_parallels = { 739 .format_name = "parallels", 740 .instance_size = sizeof(BDRVParallelsState), 741 .bdrv_probe = parallels_probe, 742 .bdrv_open = parallels_open, 743 .bdrv_close = parallels_close, 744 .bdrv_co_get_block_status = parallels_co_get_block_status, 745 .bdrv_has_zero_init = bdrv_has_zero_init_1, 746 .bdrv_co_flush_to_os = parallels_co_flush_to_os, 747 .bdrv_co_readv = parallels_co_readv, 748 .bdrv_co_writev = parallels_co_writev, 749 750 .bdrv_create = parallels_create, 751 .bdrv_check = parallels_check, 752 .create_opts = ¶llels_create_opts, 753 }; 754 755 static void bdrv_parallels_init(void) 756 { 757 bdrv_register(&bdrv_parallels); 758 } 759 760 block_init(bdrv_parallels_init); 761