1 /* 2 * QEMU disk image utility 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qapi-visit.h" 25 #include "qapi/qmp-output-visitor.h" 26 #include "qapi/qmp/qjson.h" 27 #include "qemu-common.h" 28 #include "qemu/option.h" 29 #include "qemu/error-report.h" 30 #include "qemu/osdep.h" 31 #include "sysemu/sysemu.h" 32 #include "sysemu/block-backend.h" 33 #include "block/block_int.h" 34 #include "block/blockjob.h" 35 #include "block/qapi.h" 36 #include <getopt.h> 37 38 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 39 ", Copyright (c) 2004-2008 Fabrice Bellard\n" 40 41 typedef struct img_cmd_t { 42 const char *name; 43 int (*handler)(int argc, char **argv); 44 } img_cmd_t; 45 46 enum { 47 OPTION_OUTPUT = 256, 48 OPTION_BACKING_CHAIN = 257, 49 }; 50 51 typedef enum OutputFormat { 52 OFORMAT_JSON, 53 OFORMAT_HUMAN, 54 } OutputFormat; 55 56 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ 57 #define BDRV_O_FLAGS BDRV_O_CACHE_WB 58 #define BDRV_DEFAULT_CACHE "writeback" 59 60 static void format_print(void *opaque, const char *name) 61 { 62 printf(" %s", name); 63 } 64 65 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 66 { 67 va_list ap; 68 69 error_printf("qemu-img: "); 70 71 va_start(ap, fmt); 72 error_vprintf(fmt, ap); 73 va_end(ap); 74 75 error_printf("\nTry 'qemu-img --help' for more information\n"); 76 exit(EXIT_FAILURE); 77 } 78 79 /* Please keep in synch with qemu-img.texi */ 80 static void QEMU_NORETURN help(void) 81 { 82 const char *help_msg = 83 QEMU_IMG_VERSION 84 "usage: qemu-img command [command options]\n" 85 "QEMU disk image utility\n" 86 "\n" 87 "Command syntax:\n" 88 #define DEF(option, callback, arg_string) \ 89 " " arg_string "\n" 90 #include "qemu-img-cmds.h" 91 #undef DEF 92 #undef GEN_DOCS 93 "\n" 94 "Command parameters:\n" 95 " 'filename' is a disk image filename\n" 96 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 97 " 'cache' is the cache mode used to write the output disk image, the valid\n" 98 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 99 " 'directsync' and 'unsafe' (default for convert)\n" 100 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 101 " options are the same as for the 'cache' option\n" 102 " 'size' is the disk image size in bytes. Optional suffixes\n" 103 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 104 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 105 " supported. 'b' is ignored.\n" 106 " 'output_filename' is the destination disk image filename\n" 107 " 'output_fmt' is the destination format\n" 108 " 'options' is a comma separated list of format specific options in a\n" 109 " name=value format. Use -o ? for an overview of the options supported by the\n" 110 " used format\n" 111 " 'snapshot_param' is param used for internal snapshot, format\n" 112 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 113 " '[ID_OR_NAME]'\n" 114 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 115 " instead\n" 116 " '-c' indicates that target image must be compressed (qcow format only)\n" 117 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 118 " match exactly. The image doesn't need a working backing file before\n" 119 " rebasing in this case (useful for renaming the backing file)\n" 120 " '-h' with or without a command shows this help and lists the supported formats\n" 121 " '-p' show progress of command (only certain commands)\n" 122 " '-q' use Quiet mode - do not print any output (except errors)\n" 123 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 124 " contain only zeros for qemu-img to create a sparse image during\n" 125 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 126 " unallocated or zero sectors, and the destination image will always be\n" 127 " fully allocated\n" 128 " '--output' takes the format in which the output must be done (human or json)\n" 129 " '-n' skips the target volume creation (useful if the volume is created\n" 130 " prior to running qemu-img)\n" 131 "\n" 132 "Parameters to check subcommand:\n" 133 " '-r' tries to repair any inconsistencies that are found during the check.\n" 134 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 135 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 136 " hiding corruption that has already occurred.\n" 137 "\n" 138 "Parameters to snapshot subcommand:\n" 139 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 140 " '-a' applies a snapshot (revert disk to saved state)\n" 141 " '-c' creates a snapshot\n" 142 " '-d' deletes a snapshot\n" 143 " '-l' lists all snapshots in the given image\n" 144 "\n" 145 "Parameters to compare subcommand:\n" 146 " '-f' first image format\n" 147 " '-F' second image format\n" 148 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 149 150 printf("%s\nSupported formats:", help_msg); 151 bdrv_iterate_format(format_print, NULL); 152 printf("\n"); 153 exit(EXIT_SUCCESS); 154 } 155 156 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 157 { 158 int ret = 0; 159 if (!quiet) { 160 va_list args; 161 va_start(args, fmt); 162 ret = vprintf(fmt, args); 163 va_end(args); 164 } 165 return ret; 166 } 167 168 169 static int print_block_option_help(const char *filename, const char *fmt) 170 { 171 BlockDriver *drv, *proto_drv; 172 QemuOptsList *create_opts = NULL; 173 Error *local_err = NULL; 174 175 /* Find driver and parse its options */ 176 drv = bdrv_find_format(fmt); 177 if (!drv) { 178 error_report("Unknown file format '%s'", fmt); 179 return 1; 180 } 181 182 create_opts = qemu_opts_append(create_opts, drv->create_opts); 183 if (filename) { 184 proto_drv = bdrv_find_protocol(filename, true, &local_err); 185 if (!proto_drv) { 186 error_report_err(local_err); 187 qemu_opts_free(create_opts); 188 return 1; 189 } 190 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 191 } 192 193 qemu_opts_print_help(create_opts); 194 qemu_opts_free(create_opts); 195 return 0; 196 } 197 198 static BlockBackend *img_open(const char *id, const char *filename, 199 const char *fmt, int flags, 200 bool require_io, bool quiet) 201 { 202 BlockBackend *blk; 203 BlockDriverState *bs; 204 char password[256]; 205 Error *local_err = NULL; 206 QDict *options = NULL; 207 208 if (fmt) { 209 options = qdict_new(); 210 qdict_put(options, "driver", qstring_from_str(fmt)); 211 } 212 213 blk = blk_new_open(id, filename, NULL, options, flags, &local_err); 214 if (!blk) { 215 error_report("Could not open '%s': %s", filename, 216 error_get_pretty(local_err)); 217 error_free(local_err); 218 goto fail; 219 } 220 221 bs = blk_bs(blk); 222 if (bdrv_is_encrypted(bs) && require_io) { 223 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 224 if (qemu_read_password(password, sizeof(password)) < 0) { 225 error_report("No password given"); 226 goto fail; 227 } 228 if (bdrv_set_key(bs, password) < 0) { 229 error_report("invalid password"); 230 goto fail; 231 } 232 } 233 return blk; 234 fail: 235 blk_unref(blk); 236 return NULL; 237 } 238 239 static int add_old_style_options(const char *fmt, QemuOpts *opts, 240 const char *base_filename, 241 const char *base_fmt) 242 { 243 Error *err = NULL; 244 245 if (base_filename) { 246 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 247 if (err) { 248 error_report("Backing file not supported for file format '%s'", 249 fmt); 250 error_free(err); 251 return -1; 252 } 253 } 254 if (base_fmt) { 255 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 256 if (err) { 257 error_report("Backing file format not supported for file " 258 "format '%s'", fmt); 259 error_free(err); 260 return -1; 261 } 262 } 263 return 0; 264 } 265 266 static int img_create(int argc, char **argv) 267 { 268 int c; 269 uint64_t img_size = -1; 270 const char *fmt = "raw"; 271 const char *base_fmt = NULL; 272 const char *filename; 273 const char *base_filename = NULL; 274 char *options = NULL; 275 Error *local_err = NULL; 276 bool quiet = false; 277 278 for(;;) { 279 c = getopt(argc, argv, "F:b:f:he6o:q"); 280 if (c == -1) { 281 break; 282 } 283 switch(c) { 284 case '?': 285 case 'h': 286 help(); 287 break; 288 case 'F': 289 base_fmt = optarg; 290 break; 291 case 'b': 292 base_filename = optarg; 293 break; 294 case 'f': 295 fmt = optarg; 296 break; 297 case 'e': 298 error_report("option -e is deprecated, please use \'-o " 299 "encryption\' instead!"); 300 goto fail; 301 case '6': 302 error_report("option -6 is deprecated, please use \'-o " 303 "compat6\' instead!"); 304 goto fail; 305 case 'o': 306 if (!is_valid_option_list(optarg)) { 307 error_report("Invalid option list: %s", optarg); 308 goto fail; 309 } 310 if (!options) { 311 options = g_strdup(optarg); 312 } else { 313 char *old_options = options; 314 options = g_strdup_printf("%s,%s", options, optarg); 315 g_free(old_options); 316 } 317 break; 318 case 'q': 319 quiet = true; 320 break; 321 } 322 } 323 324 /* Get the filename */ 325 filename = (optind < argc) ? argv[optind] : NULL; 326 if (options && has_help_option(options)) { 327 g_free(options); 328 return print_block_option_help(filename, fmt); 329 } 330 331 if (optind >= argc) { 332 error_exit("Expecting image file name"); 333 } 334 optind++; 335 336 /* Get image size, if specified */ 337 if (optind < argc) { 338 int64_t sval; 339 char *end; 340 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); 341 if (sval < 0 || *end) { 342 if (sval == -ERANGE) { 343 error_report("Image size must be less than 8 EiB!"); 344 } else { 345 error_report("Invalid image size specified! You may use k, M, " 346 "G, T, P or E suffixes for "); 347 error_report("kilobytes, megabytes, gigabytes, terabytes, " 348 "petabytes and exabytes."); 349 } 350 goto fail; 351 } 352 img_size = (uint64_t)sval; 353 } 354 if (optind != argc) { 355 error_exit("Unexpected argument: %s", argv[optind]); 356 } 357 358 bdrv_img_create(filename, fmt, base_filename, base_fmt, 359 options, img_size, BDRV_O_FLAGS, &local_err, quiet); 360 if (local_err) { 361 error_report("%s: %s", filename, error_get_pretty(local_err)); 362 error_free(local_err); 363 goto fail; 364 } 365 366 g_free(options); 367 return 0; 368 369 fail: 370 g_free(options); 371 return 1; 372 } 373 374 static void dump_json_image_check(ImageCheck *check, bool quiet) 375 { 376 Error *local_err = NULL; 377 QString *str; 378 QmpOutputVisitor *ov = qmp_output_visitor_new(); 379 QObject *obj; 380 visit_type_ImageCheck(qmp_output_get_visitor(ov), 381 &check, NULL, &local_err); 382 obj = qmp_output_get_qobject(ov); 383 str = qobject_to_json_pretty(obj); 384 assert(str != NULL); 385 qprintf(quiet, "%s\n", qstring_get_str(str)); 386 qobject_decref(obj); 387 qmp_output_visitor_cleanup(ov); 388 QDECREF(str); 389 } 390 391 static void dump_human_image_check(ImageCheck *check, bool quiet) 392 { 393 if (!(check->corruptions || check->leaks || check->check_errors)) { 394 qprintf(quiet, "No errors were found on the image.\n"); 395 } else { 396 if (check->corruptions) { 397 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 398 "Data may be corrupted, or further writes to the image " 399 "may corrupt it.\n", 400 check->corruptions); 401 } 402 403 if (check->leaks) { 404 qprintf(quiet, 405 "\n%" PRId64 " leaked clusters were found on the image.\n" 406 "This means waste of disk space, but no harm to data.\n", 407 check->leaks); 408 } 409 410 if (check->check_errors) { 411 qprintf(quiet, 412 "\n%" PRId64 413 " internal errors have occurred during the check.\n", 414 check->check_errors); 415 } 416 } 417 418 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 419 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 420 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 421 check->allocated_clusters, check->total_clusters, 422 check->allocated_clusters * 100.0 / check->total_clusters, 423 check->fragmented_clusters * 100.0 / check->allocated_clusters, 424 check->compressed_clusters * 100.0 / 425 check->allocated_clusters); 426 } 427 428 if (check->image_end_offset) { 429 qprintf(quiet, 430 "Image end offset: %" PRId64 "\n", check->image_end_offset); 431 } 432 } 433 434 static int collect_image_check(BlockDriverState *bs, 435 ImageCheck *check, 436 const char *filename, 437 const char *fmt, 438 int fix) 439 { 440 int ret; 441 BdrvCheckResult result; 442 443 ret = bdrv_check(bs, &result, fix); 444 if (ret < 0) { 445 return ret; 446 } 447 448 check->filename = g_strdup(filename); 449 check->format = g_strdup(bdrv_get_format_name(bs)); 450 check->check_errors = result.check_errors; 451 check->corruptions = result.corruptions; 452 check->has_corruptions = result.corruptions != 0; 453 check->leaks = result.leaks; 454 check->has_leaks = result.leaks != 0; 455 check->corruptions_fixed = result.corruptions_fixed; 456 check->has_corruptions_fixed = result.corruptions != 0; 457 check->leaks_fixed = result.leaks_fixed; 458 check->has_leaks_fixed = result.leaks != 0; 459 check->image_end_offset = result.image_end_offset; 460 check->has_image_end_offset = result.image_end_offset != 0; 461 check->total_clusters = result.bfi.total_clusters; 462 check->has_total_clusters = result.bfi.total_clusters != 0; 463 check->allocated_clusters = result.bfi.allocated_clusters; 464 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 465 check->fragmented_clusters = result.bfi.fragmented_clusters; 466 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 467 check->compressed_clusters = result.bfi.compressed_clusters; 468 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 469 470 return 0; 471 } 472 473 /* 474 * Checks an image for consistency. Exit codes: 475 * 476 * 0 - Check completed, image is good 477 * 1 - Check not completed because of internal errors 478 * 2 - Check completed, image is corrupted 479 * 3 - Check completed, image has leaked clusters, but is good otherwise 480 * 63 - Checks are not supported by the image format 481 */ 482 static int img_check(int argc, char **argv) 483 { 484 int c, ret; 485 OutputFormat output_format = OFORMAT_HUMAN; 486 const char *filename, *fmt, *output, *cache; 487 BlockBackend *blk; 488 BlockDriverState *bs; 489 int fix = 0; 490 int flags = BDRV_O_FLAGS | BDRV_O_CHECK; 491 ImageCheck *check; 492 bool quiet = false; 493 494 fmt = NULL; 495 output = NULL; 496 cache = BDRV_DEFAULT_CACHE; 497 for(;;) { 498 int option_index = 0; 499 static const struct option long_options[] = { 500 {"help", no_argument, 0, 'h'}, 501 {"format", required_argument, 0, 'f'}, 502 {"repair", required_argument, 0, 'r'}, 503 {"output", required_argument, 0, OPTION_OUTPUT}, 504 {0, 0, 0, 0} 505 }; 506 c = getopt_long(argc, argv, "hf:r:T:q", 507 long_options, &option_index); 508 if (c == -1) { 509 break; 510 } 511 switch(c) { 512 case '?': 513 case 'h': 514 help(); 515 break; 516 case 'f': 517 fmt = optarg; 518 break; 519 case 'r': 520 flags |= BDRV_O_RDWR; 521 522 if (!strcmp(optarg, "leaks")) { 523 fix = BDRV_FIX_LEAKS; 524 } else if (!strcmp(optarg, "all")) { 525 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 526 } else { 527 error_exit("Unknown option value for -r " 528 "(expecting 'leaks' or 'all'): %s", optarg); 529 } 530 break; 531 case OPTION_OUTPUT: 532 output = optarg; 533 break; 534 case 'T': 535 cache = optarg; 536 break; 537 case 'q': 538 quiet = true; 539 break; 540 } 541 } 542 if (optind != argc - 1) { 543 error_exit("Expecting one image file name"); 544 } 545 filename = argv[optind++]; 546 547 if (output && !strcmp(output, "json")) { 548 output_format = OFORMAT_JSON; 549 } else if (output && !strcmp(output, "human")) { 550 output_format = OFORMAT_HUMAN; 551 } else if (output) { 552 error_report("--output must be used with human or json as argument."); 553 return 1; 554 } 555 556 ret = bdrv_parse_cache_flags(cache, &flags); 557 if (ret < 0) { 558 error_report("Invalid source cache option: %s", cache); 559 return 1; 560 } 561 562 blk = img_open("image", filename, fmt, flags, true, quiet); 563 if (!blk) { 564 return 1; 565 } 566 bs = blk_bs(blk); 567 568 check = g_new0(ImageCheck, 1); 569 ret = collect_image_check(bs, check, filename, fmt, fix); 570 571 if (ret == -ENOTSUP) { 572 error_report("This image format does not support checks"); 573 ret = 63; 574 goto fail; 575 } 576 577 if (check->corruptions_fixed || check->leaks_fixed) { 578 int corruptions_fixed, leaks_fixed; 579 580 leaks_fixed = check->leaks_fixed; 581 corruptions_fixed = check->corruptions_fixed; 582 583 if (output_format == OFORMAT_HUMAN) { 584 qprintf(quiet, 585 "The following inconsistencies were found and repaired:\n\n" 586 " %" PRId64 " leaked clusters\n" 587 " %" PRId64 " corruptions\n\n" 588 "Double checking the fixed image now...\n", 589 check->leaks_fixed, 590 check->corruptions_fixed); 591 } 592 593 ret = collect_image_check(bs, check, filename, fmt, 0); 594 595 check->leaks_fixed = leaks_fixed; 596 check->corruptions_fixed = corruptions_fixed; 597 } 598 599 if (!ret) { 600 switch (output_format) { 601 case OFORMAT_HUMAN: 602 dump_human_image_check(check, quiet); 603 break; 604 case OFORMAT_JSON: 605 dump_json_image_check(check, quiet); 606 break; 607 } 608 } 609 610 if (ret || check->check_errors) { 611 if (ret) { 612 error_report("Check failed: %s", strerror(-ret)); 613 } else { 614 error_report("Check failed"); 615 } 616 ret = 1; 617 goto fail; 618 } 619 620 if (check->corruptions) { 621 ret = 2; 622 } else if (check->leaks) { 623 ret = 3; 624 } else { 625 ret = 0; 626 } 627 628 fail: 629 qapi_free_ImageCheck(check); 630 blk_unref(blk); 631 return ret; 632 } 633 634 typedef struct CommonBlockJobCBInfo { 635 BlockDriverState *bs; 636 Error **errp; 637 } CommonBlockJobCBInfo; 638 639 static void common_block_job_cb(void *opaque, int ret) 640 { 641 CommonBlockJobCBInfo *cbi = opaque; 642 643 if (ret < 0) { 644 error_setg_errno(cbi->errp, -ret, "Block job failed"); 645 } 646 647 /* Drop this block job's reference */ 648 bdrv_unref(cbi->bs); 649 } 650 651 static void run_block_job(BlockJob *job, Error **errp) 652 { 653 AioContext *aio_context = bdrv_get_aio_context(job->bs); 654 655 do { 656 aio_poll(aio_context, true); 657 qemu_progress_print((float)job->offset / job->len * 100.f, 0); 658 } while (!job->ready); 659 660 block_job_complete_sync(job, errp); 661 662 /* A block job may finish instantaneously without publishing any progress, 663 * so just signal completion here */ 664 qemu_progress_print(100.f, 0); 665 } 666 667 static int img_commit(int argc, char **argv) 668 { 669 int c, ret, flags; 670 const char *filename, *fmt, *cache, *base; 671 BlockBackend *blk; 672 BlockDriverState *bs, *base_bs; 673 bool progress = false, quiet = false, drop = false; 674 Error *local_err = NULL; 675 CommonBlockJobCBInfo cbi; 676 677 fmt = NULL; 678 cache = BDRV_DEFAULT_CACHE; 679 base = NULL; 680 for(;;) { 681 c = getopt(argc, argv, "f:ht:b:dpq"); 682 if (c == -1) { 683 break; 684 } 685 switch(c) { 686 case '?': 687 case 'h': 688 help(); 689 break; 690 case 'f': 691 fmt = optarg; 692 break; 693 case 't': 694 cache = optarg; 695 break; 696 case 'b': 697 base = optarg; 698 /* -b implies -d */ 699 drop = true; 700 break; 701 case 'd': 702 drop = true; 703 break; 704 case 'p': 705 progress = true; 706 break; 707 case 'q': 708 quiet = true; 709 break; 710 } 711 } 712 713 /* Progress is not shown in Quiet mode */ 714 if (quiet) { 715 progress = false; 716 } 717 718 if (optind != argc - 1) { 719 error_exit("Expecting one image file name"); 720 } 721 filename = argv[optind++]; 722 723 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 724 ret = bdrv_parse_cache_flags(cache, &flags); 725 if (ret < 0) { 726 error_report("Invalid cache option: %s", cache); 727 return 1; 728 } 729 730 blk = img_open("image", filename, fmt, flags, true, quiet); 731 if (!blk) { 732 return 1; 733 } 734 bs = blk_bs(blk); 735 736 qemu_progress_init(progress, 1.f); 737 qemu_progress_print(0.f, 100); 738 739 if (base) { 740 base_bs = bdrv_find_backing_image(bs, base); 741 if (!base_bs) { 742 error_set(&local_err, QERR_BASE_NOT_FOUND, base); 743 goto done; 744 } 745 } else { 746 /* This is different from QMP, which by default uses the deepest file in 747 * the backing chain (i.e., the very base); however, the traditional 748 * behavior of qemu-img commit is using the immediate backing file. */ 749 base_bs = bs->backing_hd; 750 if (!base_bs) { 751 error_setg(&local_err, "Image does not have a backing file"); 752 goto done; 753 } 754 } 755 756 cbi = (CommonBlockJobCBInfo){ 757 .errp = &local_err, 758 .bs = bs, 759 }; 760 761 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 762 common_block_job_cb, &cbi, &local_err); 763 if (local_err) { 764 goto done; 765 } 766 767 /* The block job will swap base_bs and bs (which is not what we really want 768 * here, but okay) and unref base_bs (after the swap, i.e., the old top 769 * image). In order to still be able to empty that top image afterwards, 770 * increment the reference counter here preemptively. */ 771 if (!drop) { 772 bdrv_ref(base_bs); 773 } 774 775 run_block_job(bs->job, &local_err); 776 if (local_err) { 777 goto unref_backing; 778 } 779 780 if (!drop && base_bs->drv->bdrv_make_empty) { 781 ret = base_bs->drv->bdrv_make_empty(base_bs); 782 if (ret) { 783 error_setg_errno(&local_err, -ret, "Could not empty %s", 784 filename); 785 goto unref_backing; 786 } 787 } 788 789 unref_backing: 790 if (!drop) { 791 bdrv_unref(base_bs); 792 } 793 794 done: 795 qemu_progress_end(); 796 797 blk_unref(blk); 798 799 if (local_err) { 800 error_report_err(local_err); 801 return 1; 802 } 803 804 qprintf(quiet, "Image committed.\n"); 805 return 0; 806 } 807 808 /* 809 * Returns true iff the first sector pointed to by 'buf' contains at least 810 * a non-NUL byte. 811 * 812 * 'pnum' is set to the number of sectors (including and immediately following 813 * the first one) that are known to be in the same allocated/unallocated state. 814 */ 815 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 816 { 817 bool is_zero; 818 int i; 819 820 if (n <= 0) { 821 *pnum = 0; 822 return 0; 823 } 824 is_zero = buffer_is_zero(buf, 512); 825 for(i = 1; i < n; i++) { 826 buf += 512; 827 if (is_zero != buffer_is_zero(buf, 512)) { 828 break; 829 } 830 } 831 *pnum = i; 832 return !is_zero; 833 } 834 835 /* 836 * Like is_allocated_sectors, but if the buffer starts with a used sector, 837 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 838 * breaking up write requests for only small sparse areas. 839 */ 840 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 841 int min) 842 { 843 int ret; 844 int num_checked, num_used; 845 846 if (n < min) { 847 min = n; 848 } 849 850 ret = is_allocated_sectors(buf, n, pnum); 851 if (!ret) { 852 return ret; 853 } 854 855 num_used = *pnum; 856 buf += BDRV_SECTOR_SIZE * *pnum; 857 n -= *pnum; 858 num_checked = num_used; 859 860 while (n > 0) { 861 ret = is_allocated_sectors(buf, n, pnum); 862 863 buf += BDRV_SECTOR_SIZE * *pnum; 864 n -= *pnum; 865 num_checked += *pnum; 866 if (ret) { 867 num_used = num_checked; 868 } else if (*pnum >= min) { 869 break; 870 } 871 } 872 873 *pnum = num_used; 874 return 1; 875 } 876 877 /* 878 * Compares two buffers sector by sector. Returns 0 if the first sector of both 879 * buffers matches, non-zero otherwise. 880 * 881 * pnum is set to the number of sectors (including and immediately following 882 * the first one) that are known to have the same comparison result 883 */ 884 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 885 int *pnum) 886 { 887 bool res; 888 int i; 889 890 if (n <= 0) { 891 *pnum = 0; 892 return 0; 893 } 894 895 res = !!memcmp(buf1, buf2, 512); 896 for(i = 1; i < n; i++) { 897 buf1 += 512; 898 buf2 += 512; 899 900 if (!!memcmp(buf1, buf2, 512) != res) { 901 break; 902 } 903 } 904 905 *pnum = i; 906 return res; 907 } 908 909 #define IO_BUF_SIZE (2 * 1024 * 1024) 910 911 static int64_t sectors_to_bytes(int64_t sectors) 912 { 913 return sectors << BDRV_SECTOR_BITS; 914 } 915 916 static int64_t sectors_to_process(int64_t total, int64_t from) 917 { 918 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 919 } 920 921 /* 922 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 923 * 924 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 925 * data and negative value on error. 926 * 927 * @param blk: BlockBackend for the image 928 * @param sect_num: Number of first sector to check 929 * @param sect_count: Number of sectors to check 930 * @param filename: Name of disk file we are checking (logging purpose) 931 * @param buffer: Allocated buffer for storing read data 932 * @param quiet: Flag for quiet mode 933 */ 934 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 935 int sect_count, const char *filename, 936 uint8_t *buffer, bool quiet) 937 { 938 int pnum, ret = 0; 939 ret = blk_read(blk, sect_num, buffer, sect_count); 940 if (ret < 0) { 941 error_report("Error while reading offset %" PRId64 " of %s: %s", 942 sectors_to_bytes(sect_num), filename, strerror(-ret)); 943 return ret; 944 } 945 ret = is_allocated_sectors(buffer, sect_count, &pnum); 946 if (ret || pnum != sect_count) { 947 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 948 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 949 return 1; 950 } 951 952 return 0; 953 } 954 955 /* 956 * Compares two images. Exit codes: 957 * 958 * 0 - Images are identical 959 * 1 - Images differ 960 * >1 - Error occurred 961 */ 962 static int img_compare(int argc, char **argv) 963 { 964 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 965 BlockBackend *blk1, *blk2; 966 BlockDriverState *bs1, *bs2; 967 int64_t total_sectors1, total_sectors2; 968 uint8_t *buf1 = NULL, *buf2 = NULL; 969 int pnum1, pnum2; 970 int allocated1, allocated2; 971 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 972 bool progress = false, quiet = false, strict = false; 973 int flags; 974 int64_t total_sectors; 975 int64_t sector_num = 0; 976 int64_t nb_sectors; 977 int c, pnum; 978 uint64_t progress_base; 979 980 cache = BDRV_DEFAULT_CACHE; 981 for (;;) { 982 c = getopt(argc, argv, "hf:F:T:pqs"); 983 if (c == -1) { 984 break; 985 } 986 switch (c) { 987 case '?': 988 case 'h': 989 help(); 990 break; 991 case 'f': 992 fmt1 = optarg; 993 break; 994 case 'F': 995 fmt2 = optarg; 996 break; 997 case 'T': 998 cache = optarg; 999 break; 1000 case 'p': 1001 progress = true; 1002 break; 1003 case 'q': 1004 quiet = true; 1005 break; 1006 case 's': 1007 strict = true; 1008 break; 1009 } 1010 } 1011 1012 /* Progress is not shown in Quiet mode */ 1013 if (quiet) { 1014 progress = false; 1015 } 1016 1017 1018 if (optind != argc - 2) { 1019 error_exit("Expecting two image file names"); 1020 } 1021 filename1 = argv[optind++]; 1022 filename2 = argv[optind++]; 1023 1024 /* Initialize before goto out */ 1025 qemu_progress_init(progress, 2.0); 1026 1027 flags = BDRV_O_FLAGS; 1028 ret = bdrv_parse_cache_flags(cache, &flags); 1029 if (ret < 0) { 1030 error_report("Invalid source cache option: %s", cache); 1031 ret = 2; 1032 goto out3; 1033 } 1034 1035 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); 1036 if (!blk1) { 1037 ret = 2; 1038 goto out3; 1039 } 1040 bs1 = blk_bs(blk1); 1041 1042 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1043 if (!blk2) { 1044 ret = 2; 1045 goto out2; 1046 } 1047 bs2 = blk_bs(blk2); 1048 1049 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1050 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1051 total_sectors1 = blk_nb_sectors(blk1); 1052 if (total_sectors1 < 0) { 1053 error_report("Can't get size of %s: %s", 1054 filename1, strerror(-total_sectors1)); 1055 ret = 4; 1056 goto out; 1057 } 1058 total_sectors2 = blk_nb_sectors(blk2); 1059 if (total_sectors2 < 0) { 1060 error_report("Can't get size of %s: %s", 1061 filename2, strerror(-total_sectors2)); 1062 ret = 4; 1063 goto out; 1064 } 1065 total_sectors = MIN(total_sectors1, total_sectors2); 1066 progress_base = MAX(total_sectors1, total_sectors2); 1067 1068 qemu_progress_print(0, 100); 1069 1070 if (strict && total_sectors1 != total_sectors2) { 1071 ret = 1; 1072 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1073 goto out; 1074 } 1075 1076 for (;;) { 1077 nb_sectors = sectors_to_process(total_sectors, sector_num); 1078 if (nb_sectors <= 0) { 1079 break; 1080 } 1081 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, 1082 &pnum1); 1083 if (allocated1 < 0) { 1084 ret = 3; 1085 error_report("Sector allocation test failed for %s", filename1); 1086 goto out; 1087 } 1088 1089 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, 1090 &pnum2); 1091 if (allocated2 < 0) { 1092 ret = 3; 1093 error_report("Sector allocation test failed for %s", filename2); 1094 goto out; 1095 } 1096 nb_sectors = MIN(pnum1, pnum2); 1097 1098 if (allocated1 == allocated2) { 1099 if (allocated1) { 1100 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1101 if (ret < 0) { 1102 error_report("Error while reading offset %" PRId64 " of %s:" 1103 " %s", sectors_to_bytes(sector_num), filename1, 1104 strerror(-ret)); 1105 ret = 4; 1106 goto out; 1107 } 1108 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1109 if (ret < 0) { 1110 error_report("Error while reading offset %" PRId64 1111 " of %s: %s", sectors_to_bytes(sector_num), 1112 filename2, strerror(-ret)); 1113 ret = 4; 1114 goto out; 1115 } 1116 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1117 if (ret || pnum != nb_sectors) { 1118 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1119 sectors_to_bytes( 1120 ret ? sector_num : sector_num + pnum)); 1121 ret = 1; 1122 goto out; 1123 } 1124 } 1125 } else { 1126 if (strict) { 1127 ret = 1; 1128 qprintf(quiet, "Strict mode: Offset %" PRId64 1129 " allocation mismatch!\n", 1130 sectors_to_bytes(sector_num)); 1131 goto out; 1132 } 1133 1134 if (allocated1) { 1135 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1136 filename1, buf1, quiet); 1137 } else { 1138 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1139 filename2, buf1, quiet); 1140 } 1141 if (ret) { 1142 if (ret < 0) { 1143 error_report("Error while reading offset %" PRId64 ": %s", 1144 sectors_to_bytes(sector_num), strerror(-ret)); 1145 ret = 4; 1146 } 1147 goto out; 1148 } 1149 } 1150 sector_num += nb_sectors; 1151 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1152 } 1153 1154 if (total_sectors1 != total_sectors2) { 1155 BlockBackend *blk_over; 1156 int64_t total_sectors_over; 1157 const char *filename_over; 1158 1159 qprintf(quiet, "Warning: Image size mismatch!\n"); 1160 if (total_sectors1 > total_sectors2) { 1161 total_sectors_over = total_sectors1; 1162 blk_over = blk1; 1163 filename_over = filename1; 1164 } else { 1165 total_sectors_over = total_sectors2; 1166 blk_over = blk2; 1167 filename_over = filename2; 1168 } 1169 1170 for (;;) { 1171 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1172 if (nb_sectors <= 0) { 1173 break; 1174 } 1175 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1176 nb_sectors, &pnum); 1177 if (ret < 0) { 1178 ret = 3; 1179 error_report("Sector allocation test failed for %s", 1180 filename_over); 1181 goto out; 1182 1183 } 1184 nb_sectors = pnum; 1185 if (ret) { 1186 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1187 filename_over, buf1, quiet); 1188 if (ret) { 1189 if (ret < 0) { 1190 error_report("Error while reading offset %" PRId64 1191 " of %s: %s", sectors_to_bytes(sector_num), 1192 filename_over, strerror(-ret)); 1193 ret = 4; 1194 } 1195 goto out; 1196 } 1197 } 1198 sector_num += nb_sectors; 1199 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1200 } 1201 } 1202 1203 qprintf(quiet, "Images are identical.\n"); 1204 ret = 0; 1205 1206 out: 1207 qemu_vfree(buf1); 1208 qemu_vfree(buf2); 1209 blk_unref(blk2); 1210 out2: 1211 blk_unref(blk1); 1212 out3: 1213 qemu_progress_end(); 1214 return ret; 1215 } 1216 1217 enum ImgConvertBlockStatus { 1218 BLK_DATA, 1219 BLK_ZERO, 1220 BLK_BACKING_FILE, 1221 }; 1222 1223 typedef struct ImgConvertState { 1224 BlockBackend **src; 1225 int64_t *src_sectors; 1226 int src_cur, src_num; 1227 int64_t src_cur_offset; 1228 int64_t total_sectors; 1229 int64_t allocated_sectors; 1230 enum ImgConvertBlockStatus status; 1231 int64_t sector_next_status; 1232 BlockBackend *target; 1233 bool has_zero_init; 1234 bool compressed; 1235 bool target_has_backing; 1236 int min_sparse; 1237 size_t cluster_sectors; 1238 size_t buf_sectors; 1239 } ImgConvertState; 1240 1241 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1242 { 1243 assert(sector_num >= s->src_cur_offset); 1244 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1245 s->src_cur_offset += s->src_sectors[s->src_cur]; 1246 s->src_cur++; 1247 assert(s->src_cur < s->src_num); 1248 } 1249 } 1250 1251 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1252 { 1253 int64_t ret; 1254 int n; 1255 1256 convert_select_part(s, sector_num); 1257 1258 assert(s->total_sectors > sector_num); 1259 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1260 1261 if (s->sector_next_status <= sector_num) { 1262 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1263 sector_num - s->src_cur_offset, 1264 n, &n); 1265 if (ret < 0) { 1266 return ret; 1267 } 1268 1269 if (ret & BDRV_BLOCK_ZERO) { 1270 s->status = BLK_ZERO; 1271 } else if (ret & BDRV_BLOCK_DATA) { 1272 s->status = BLK_DATA; 1273 } else if (!s->target_has_backing) { 1274 /* Without a target backing file we must copy over the contents of 1275 * the backing file as well. */ 1276 /* TODO Check block status of the backing file chain to avoid 1277 * needlessly reading zeroes and limiting the iteration to the 1278 * buffer size */ 1279 s->status = BLK_DATA; 1280 } else { 1281 s->status = BLK_BACKING_FILE; 1282 } 1283 1284 s->sector_next_status = sector_num + n; 1285 } 1286 1287 n = MIN(n, s->sector_next_status - sector_num); 1288 if (s->status == BLK_DATA) { 1289 n = MIN(n, s->buf_sectors); 1290 } 1291 1292 /* We need to write complete clusters for compressed images, so if an 1293 * unallocated area is shorter than that, we must consider the whole 1294 * cluster allocated. */ 1295 if (s->compressed) { 1296 if (n < s->cluster_sectors) { 1297 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1298 s->status = BLK_DATA; 1299 } else { 1300 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1301 } 1302 } 1303 1304 return n; 1305 } 1306 1307 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1308 uint8_t *buf) 1309 { 1310 int n; 1311 int ret; 1312 1313 if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { 1314 return 0; 1315 } 1316 1317 assert(nb_sectors <= s->buf_sectors); 1318 while (nb_sectors > 0) { 1319 BlockBackend *blk; 1320 int64_t bs_sectors; 1321 1322 /* In the case of compression with multiple source files, we can get a 1323 * nb_sectors that spreads into the next part. So we must be able to 1324 * read across multiple BDSes for one convert_read() call. */ 1325 convert_select_part(s, sector_num); 1326 blk = s->src[s->src_cur]; 1327 bs_sectors = s->src_sectors[s->src_cur]; 1328 1329 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1330 ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); 1331 if (ret < 0) { 1332 return ret; 1333 } 1334 1335 sector_num += n; 1336 nb_sectors -= n; 1337 buf += n * BDRV_SECTOR_SIZE; 1338 } 1339 1340 return 0; 1341 } 1342 1343 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1344 const uint8_t *buf) 1345 { 1346 int ret; 1347 1348 while (nb_sectors > 0) { 1349 int n = nb_sectors; 1350 1351 switch (s->status) { 1352 case BLK_BACKING_FILE: 1353 /* If we have a backing file, leave clusters unallocated that are 1354 * unallocated in the source image, so that the backing file is 1355 * visible at the respective offset. */ 1356 assert(s->target_has_backing); 1357 break; 1358 1359 case BLK_DATA: 1360 /* We must always write compressed clusters as a whole, so don't 1361 * try to find zeroed parts in the buffer. We can only save the 1362 * write if the buffer is completely zeroed and we're allowed to 1363 * keep the target sparse. */ 1364 if (s->compressed) { 1365 if (s->has_zero_init && s->min_sparse && 1366 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1367 { 1368 assert(!s->target_has_backing); 1369 break; 1370 } 1371 1372 ret = blk_write_compressed(s->target, sector_num, buf, n); 1373 if (ret < 0) { 1374 return ret; 1375 } 1376 break; 1377 } 1378 1379 /* If there is real non-zero data or we're told to keep the target 1380 * fully allocated (-S 0), we must write it. Otherwise we can treat 1381 * it as zero sectors. */ 1382 if (!s->min_sparse || 1383 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1384 { 1385 ret = blk_write(s->target, sector_num, buf, n); 1386 if (ret < 0) { 1387 return ret; 1388 } 1389 break; 1390 } 1391 /* fall-through */ 1392 1393 case BLK_ZERO: 1394 if (s->has_zero_init) { 1395 break; 1396 } 1397 ret = blk_write_zeroes(s->target, sector_num, n, 0); 1398 if (ret < 0) { 1399 return ret; 1400 } 1401 break; 1402 } 1403 1404 sector_num += n; 1405 nb_sectors -= n; 1406 buf += n * BDRV_SECTOR_SIZE; 1407 } 1408 1409 return 0; 1410 } 1411 1412 static int convert_do_copy(ImgConvertState *s) 1413 { 1414 uint8_t *buf = NULL; 1415 int64_t sector_num, allocated_done; 1416 int ret; 1417 int n; 1418 1419 /* Check whether we have zero initialisation or can get it efficiently */ 1420 s->has_zero_init = s->min_sparse && !s->target_has_backing 1421 ? bdrv_has_zero_init(blk_bs(s->target)) 1422 : false; 1423 1424 if (!s->has_zero_init && !s->target_has_backing && 1425 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1426 { 1427 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1428 if (ret == 0) { 1429 s->has_zero_init = true; 1430 } 1431 } 1432 1433 /* Allocate buffer for copied data. For compressed images, only one cluster 1434 * can be copied at a time. */ 1435 if (s->compressed) { 1436 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1437 error_report("invalid cluster size"); 1438 ret = -EINVAL; 1439 goto fail; 1440 } 1441 s->buf_sectors = s->cluster_sectors; 1442 } 1443 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1444 1445 /* Calculate allocated sectors for progress */ 1446 s->allocated_sectors = 0; 1447 sector_num = 0; 1448 while (sector_num < s->total_sectors) { 1449 n = convert_iteration_sectors(s, sector_num); 1450 if (n < 0) { 1451 ret = n; 1452 goto fail; 1453 } 1454 if (s->status == BLK_DATA) { 1455 s->allocated_sectors += n; 1456 } 1457 sector_num += n; 1458 } 1459 1460 /* Do the copy */ 1461 s->src_cur = 0; 1462 s->src_cur_offset = 0; 1463 s->sector_next_status = 0; 1464 1465 sector_num = 0; 1466 allocated_done = 0; 1467 1468 while (sector_num < s->total_sectors) { 1469 n = convert_iteration_sectors(s, sector_num); 1470 if (n < 0) { 1471 ret = n; 1472 goto fail; 1473 } 1474 if (s->status == BLK_DATA) { 1475 allocated_done += n; 1476 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1477 0); 1478 } 1479 1480 ret = convert_read(s, sector_num, n, buf); 1481 if (ret < 0) { 1482 error_report("error while reading sector %" PRId64 1483 ": %s", sector_num, strerror(-ret)); 1484 goto fail; 1485 } 1486 1487 ret = convert_write(s, sector_num, n, buf); 1488 if (ret < 0) { 1489 error_report("error while writing sector %" PRId64 1490 ": %s", sector_num, strerror(-ret)); 1491 goto fail; 1492 } 1493 1494 sector_num += n; 1495 } 1496 1497 if (s->compressed) { 1498 /* signal EOF to align */ 1499 ret = blk_write_compressed(s->target, 0, NULL, 0); 1500 if (ret < 0) { 1501 goto fail; 1502 } 1503 } 1504 1505 ret = 0; 1506 fail: 1507 qemu_vfree(buf); 1508 return ret; 1509 } 1510 1511 static int img_convert(int argc, char **argv) 1512 { 1513 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1514 int64_t ret = 0; 1515 int progress = 0, flags, src_flags; 1516 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1517 BlockDriver *drv, *proto_drv; 1518 BlockBackend **blk = NULL, *out_blk = NULL; 1519 BlockDriverState **bs = NULL, *out_bs = NULL; 1520 int64_t total_sectors; 1521 int64_t *bs_sectors = NULL; 1522 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1523 BlockDriverInfo bdi; 1524 QemuOpts *opts = NULL; 1525 QemuOptsList *create_opts = NULL; 1526 const char *out_baseimg_param; 1527 char *options = NULL; 1528 const char *snapshot_name = NULL; 1529 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1530 bool quiet = false; 1531 Error *local_err = NULL; 1532 QemuOpts *sn_opts = NULL; 1533 ImgConvertState state; 1534 1535 fmt = NULL; 1536 out_fmt = "raw"; 1537 cache = "unsafe"; 1538 src_cache = BDRV_DEFAULT_CACHE; 1539 out_baseimg = NULL; 1540 compress = 0; 1541 skip_create = 0; 1542 for(;;) { 1543 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1544 if (c == -1) { 1545 break; 1546 } 1547 switch(c) { 1548 case '?': 1549 case 'h': 1550 help(); 1551 break; 1552 case 'f': 1553 fmt = optarg; 1554 break; 1555 case 'O': 1556 out_fmt = optarg; 1557 break; 1558 case 'B': 1559 out_baseimg = optarg; 1560 break; 1561 case 'c': 1562 compress = 1; 1563 break; 1564 case 'e': 1565 error_report("option -e is deprecated, please use \'-o " 1566 "encryption\' instead!"); 1567 ret = -1; 1568 goto fail_getopt; 1569 case '6': 1570 error_report("option -6 is deprecated, please use \'-o " 1571 "compat6\' instead!"); 1572 ret = -1; 1573 goto fail_getopt; 1574 case 'o': 1575 if (!is_valid_option_list(optarg)) { 1576 error_report("Invalid option list: %s", optarg); 1577 ret = -1; 1578 goto fail_getopt; 1579 } 1580 if (!options) { 1581 options = g_strdup(optarg); 1582 } else { 1583 char *old_options = options; 1584 options = g_strdup_printf("%s,%s", options, optarg); 1585 g_free(old_options); 1586 } 1587 break; 1588 case 's': 1589 snapshot_name = optarg; 1590 break; 1591 case 'l': 1592 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1593 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0); 1594 if (!sn_opts) { 1595 error_report("Failed in parsing snapshot param '%s'", 1596 optarg); 1597 ret = -1; 1598 goto fail_getopt; 1599 } 1600 } else { 1601 snapshot_name = optarg; 1602 } 1603 break; 1604 case 'S': 1605 { 1606 int64_t sval; 1607 char *end; 1608 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); 1609 if (sval < 0 || *end) { 1610 error_report("Invalid minimum zero buffer size for sparse output specified"); 1611 ret = -1; 1612 goto fail_getopt; 1613 } 1614 1615 min_sparse = sval / BDRV_SECTOR_SIZE; 1616 break; 1617 } 1618 case 'p': 1619 progress = 1; 1620 break; 1621 case 't': 1622 cache = optarg; 1623 break; 1624 case 'T': 1625 src_cache = optarg; 1626 break; 1627 case 'q': 1628 quiet = true; 1629 break; 1630 case 'n': 1631 skip_create = 1; 1632 break; 1633 } 1634 } 1635 1636 /* Initialize before goto out */ 1637 if (quiet) { 1638 progress = 0; 1639 } 1640 qemu_progress_init(progress, 1.0); 1641 1642 1643 bs_n = argc - optind - 1; 1644 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1645 1646 if (options && has_help_option(options)) { 1647 ret = print_block_option_help(out_filename, out_fmt); 1648 goto out; 1649 } 1650 1651 if (bs_n < 1) { 1652 error_exit("Must specify image file name"); 1653 } 1654 1655 1656 if (bs_n > 1 && out_baseimg) { 1657 error_report("-B makes no sense when concatenating multiple input " 1658 "images"); 1659 ret = -1; 1660 goto out; 1661 } 1662 1663 src_flags = BDRV_O_FLAGS; 1664 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1665 if (ret < 0) { 1666 error_report("Invalid source cache option: %s", src_cache); 1667 goto out; 1668 } 1669 1670 qemu_progress_print(0, 100); 1671 1672 blk = g_new0(BlockBackend *, bs_n); 1673 bs = g_new0(BlockDriverState *, bs_n); 1674 bs_sectors = g_new(int64_t, bs_n); 1675 1676 total_sectors = 0; 1677 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1678 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1679 : g_strdup("source"); 1680 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1681 true, quiet); 1682 g_free(id); 1683 if (!blk[bs_i]) { 1684 ret = -1; 1685 goto out; 1686 } 1687 bs[bs_i] = blk_bs(blk[bs_i]); 1688 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1689 if (bs_sectors[bs_i] < 0) { 1690 error_report("Could not get size of %s: %s", 1691 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1692 ret = -1; 1693 goto out; 1694 } 1695 total_sectors += bs_sectors[bs_i]; 1696 } 1697 1698 if (sn_opts) { 1699 ret = bdrv_snapshot_load_tmp(bs[0], 1700 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1701 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1702 &local_err); 1703 } else if (snapshot_name != NULL) { 1704 if (bs_n > 1) { 1705 error_report("No support for concatenating multiple snapshot"); 1706 ret = -1; 1707 goto out; 1708 } 1709 1710 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1711 } 1712 if (local_err) { 1713 error_report("Failed to load snapshot: %s", 1714 error_get_pretty(local_err)); 1715 error_free(local_err); 1716 ret = -1; 1717 goto out; 1718 } 1719 1720 /* Find driver and parse its options */ 1721 drv = bdrv_find_format(out_fmt); 1722 if (!drv) { 1723 error_report("Unknown file format '%s'", out_fmt); 1724 ret = -1; 1725 goto out; 1726 } 1727 1728 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1729 if (!proto_drv) { 1730 error_report_err(local_err); 1731 ret = -1; 1732 goto out; 1733 } 1734 1735 if (!skip_create) { 1736 if (!drv->create_opts) { 1737 error_report("Format driver '%s' does not support image creation", 1738 drv->format_name); 1739 ret = -1; 1740 goto out; 1741 } 1742 1743 if (!proto_drv->create_opts) { 1744 error_report("Protocol driver '%s' does not support image creation", 1745 proto_drv->format_name); 1746 ret = -1; 1747 goto out; 1748 } 1749 1750 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1751 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1752 1753 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1754 if (options) { 1755 qemu_opts_do_parse(opts, options, NULL, &local_err); 1756 if (local_err) { 1757 error_report_err(local_err); 1758 ret = -1; 1759 goto out; 1760 } 1761 } 1762 1763 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1764 &error_abort); 1765 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1766 if (ret < 0) { 1767 goto out; 1768 } 1769 } 1770 1771 /* Get backing file name if -o backing_file was used */ 1772 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1773 if (out_baseimg_param) { 1774 out_baseimg = out_baseimg_param; 1775 } 1776 1777 /* Check if compression is supported */ 1778 if (compress) { 1779 bool encryption = 1780 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1781 const char *preallocation = 1782 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1783 1784 if (!drv->bdrv_write_compressed) { 1785 error_report("Compression not supported for this file format"); 1786 ret = -1; 1787 goto out; 1788 } 1789 1790 if (encryption) { 1791 error_report("Compression and encryption not supported at " 1792 "the same time"); 1793 ret = -1; 1794 goto out; 1795 } 1796 1797 if (preallocation 1798 && strcmp(preallocation, "off")) 1799 { 1800 error_report("Compression and preallocation not supported at " 1801 "the same time"); 1802 ret = -1; 1803 goto out; 1804 } 1805 } 1806 1807 if (!skip_create) { 1808 /* Create the new image */ 1809 ret = bdrv_create(drv, out_filename, opts, &local_err); 1810 if (ret < 0) { 1811 error_report("%s: error while converting %s: %s", 1812 out_filename, out_fmt, error_get_pretty(local_err)); 1813 error_free(local_err); 1814 goto out; 1815 } 1816 } 1817 1818 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1819 ret = bdrv_parse_cache_flags(cache, &flags); 1820 if (ret < 0) { 1821 error_report("Invalid cache option: %s", cache); 1822 goto out; 1823 } 1824 1825 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1826 if (!out_blk) { 1827 ret = -1; 1828 goto out; 1829 } 1830 out_bs = blk_bs(out_blk); 1831 1832 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1833 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1834 * as maximum. */ 1835 bufsectors = MIN(32768, 1836 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1837 out_bs->bl.discard_alignment)) 1838 ); 1839 1840 if (skip_create) { 1841 int64_t output_sectors = blk_nb_sectors(out_blk); 1842 if (output_sectors < 0) { 1843 error_report("unable to get output image length: %s", 1844 strerror(-output_sectors)); 1845 ret = -1; 1846 goto out; 1847 } else if (output_sectors < total_sectors) { 1848 error_report("output file is smaller than input file"); 1849 ret = -1; 1850 goto out; 1851 } 1852 } 1853 1854 cluster_sectors = 0; 1855 ret = bdrv_get_info(out_bs, &bdi); 1856 if (ret < 0) { 1857 if (compress) { 1858 error_report("could not get block driver info"); 1859 goto out; 1860 } 1861 } else { 1862 compress = compress || bdi.needs_compressed_writes; 1863 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1864 } 1865 1866 state = (ImgConvertState) { 1867 .src = blk, 1868 .src_sectors = bs_sectors, 1869 .src_num = bs_n, 1870 .total_sectors = total_sectors, 1871 .target = out_blk, 1872 .compressed = compress, 1873 .target_has_backing = (bool) out_baseimg, 1874 .min_sparse = min_sparse, 1875 .cluster_sectors = cluster_sectors, 1876 .buf_sectors = bufsectors, 1877 }; 1878 ret = convert_do_copy(&state); 1879 1880 out: 1881 if (!ret) { 1882 qemu_progress_print(100, 0); 1883 } 1884 qemu_progress_end(); 1885 qemu_opts_del(opts); 1886 qemu_opts_free(create_opts); 1887 qemu_opts_del(sn_opts); 1888 blk_unref(out_blk); 1889 g_free(bs); 1890 if (blk) { 1891 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1892 blk_unref(blk[bs_i]); 1893 } 1894 g_free(blk); 1895 } 1896 g_free(bs_sectors); 1897 fail_getopt: 1898 g_free(options); 1899 1900 if (ret) { 1901 return 1; 1902 } 1903 return 0; 1904 } 1905 1906 1907 static void dump_snapshots(BlockDriverState *bs) 1908 { 1909 QEMUSnapshotInfo *sn_tab, *sn; 1910 int nb_sns, i; 1911 1912 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1913 if (nb_sns <= 0) 1914 return; 1915 printf("Snapshot list:\n"); 1916 bdrv_snapshot_dump(fprintf, stdout, NULL); 1917 printf("\n"); 1918 for(i = 0; i < nb_sns; i++) { 1919 sn = &sn_tab[i]; 1920 bdrv_snapshot_dump(fprintf, stdout, sn); 1921 printf("\n"); 1922 } 1923 g_free(sn_tab); 1924 } 1925 1926 static void dump_json_image_info_list(ImageInfoList *list) 1927 { 1928 Error *local_err = NULL; 1929 QString *str; 1930 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1931 QObject *obj; 1932 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1933 &list, NULL, &local_err); 1934 obj = qmp_output_get_qobject(ov); 1935 str = qobject_to_json_pretty(obj); 1936 assert(str != NULL); 1937 printf("%s\n", qstring_get_str(str)); 1938 qobject_decref(obj); 1939 qmp_output_visitor_cleanup(ov); 1940 QDECREF(str); 1941 } 1942 1943 static void dump_json_image_info(ImageInfo *info) 1944 { 1945 Error *local_err = NULL; 1946 QString *str; 1947 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1948 QObject *obj; 1949 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1950 &info, NULL, &local_err); 1951 obj = qmp_output_get_qobject(ov); 1952 str = qobject_to_json_pretty(obj); 1953 assert(str != NULL); 1954 printf("%s\n", qstring_get_str(str)); 1955 qobject_decref(obj); 1956 qmp_output_visitor_cleanup(ov); 1957 QDECREF(str); 1958 } 1959 1960 static void dump_human_image_info_list(ImageInfoList *list) 1961 { 1962 ImageInfoList *elem; 1963 bool delim = false; 1964 1965 for (elem = list; elem; elem = elem->next) { 1966 if (delim) { 1967 printf("\n"); 1968 } 1969 delim = true; 1970 1971 bdrv_image_info_dump(fprintf, stdout, elem->value); 1972 } 1973 } 1974 1975 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1976 { 1977 return strcmp(a, b) == 0; 1978 } 1979 1980 /** 1981 * Open an image file chain and return an ImageInfoList 1982 * 1983 * @filename: topmost image filename 1984 * @fmt: topmost image format (may be NULL to autodetect) 1985 * @chain: true - enumerate entire backing file chain 1986 * false - only topmost image file 1987 * 1988 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1989 * image file. If there was an error a message will have been printed to 1990 * stderr. 1991 */ 1992 static ImageInfoList *collect_image_info_list(const char *filename, 1993 const char *fmt, 1994 bool chain) 1995 { 1996 ImageInfoList *head = NULL; 1997 ImageInfoList **last = &head; 1998 GHashTable *filenames; 1999 Error *err = NULL; 2000 2001 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2002 2003 while (filename) { 2004 BlockBackend *blk; 2005 BlockDriverState *bs; 2006 ImageInfo *info; 2007 ImageInfoList *elem; 2008 2009 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2010 error_report("Backing file '%s' creates an infinite loop.", 2011 filename); 2012 goto err; 2013 } 2014 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2015 2016 blk = img_open("image", filename, fmt, 2017 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2018 if (!blk) { 2019 goto err; 2020 } 2021 bs = blk_bs(blk); 2022 2023 bdrv_query_image_info(bs, &info, &err); 2024 if (err) { 2025 error_report_err(err); 2026 blk_unref(blk); 2027 goto err; 2028 } 2029 2030 elem = g_new0(ImageInfoList, 1); 2031 elem->value = info; 2032 *last = elem; 2033 last = &elem->next; 2034 2035 blk_unref(blk); 2036 2037 filename = fmt = NULL; 2038 if (chain) { 2039 if (info->has_full_backing_filename) { 2040 filename = info->full_backing_filename; 2041 } else if (info->has_backing_filename) { 2042 filename = info->backing_filename; 2043 } 2044 if (info->has_backing_filename_format) { 2045 fmt = info->backing_filename_format; 2046 } 2047 } 2048 } 2049 g_hash_table_destroy(filenames); 2050 return head; 2051 2052 err: 2053 qapi_free_ImageInfoList(head); 2054 g_hash_table_destroy(filenames); 2055 return NULL; 2056 } 2057 2058 static int img_info(int argc, char **argv) 2059 { 2060 int c; 2061 OutputFormat output_format = OFORMAT_HUMAN; 2062 bool chain = false; 2063 const char *filename, *fmt, *output; 2064 ImageInfoList *list; 2065 2066 fmt = NULL; 2067 output = NULL; 2068 for(;;) { 2069 int option_index = 0; 2070 static const struct option long_options[] = { 2071 {"help", no_argument, 0, 'h'}, 2072 {"format", required_argument, 0, 'f'}, 2073 {"output", required_argument, 0, OPTION_OUTPUT}, 2074 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2075 {0, 0, 0, 0} 2076 }; 2077 c = getopt_long(argc, argv, "f:h", 2078 long_options, &option_index); 2079 if (c == -1) { 2080 break; 2081 } 2082 switch(c) { 2083 case '?': 2084 case 'h': 2085 help(); 2086 break; 2087 case 'f': 2088 fmt = optarg; 2089 break; 2090 case OPTION_OUTPUT: 2091 output = optarg; 2092 break; 2093 case OPTION_BACKING_CHAIN: 2094 chain = true; 2095 break; 2096 } 2097 } 2098 if (optind != argc - 1) { 2099 error_exit("Expecting one image file name"); 2100 } 2101 filename = argv[optind++]; 2102 2103 if (output && !strcmp(output, "json")) { 2104 output_format = OFORMAT_JSON; 2105 } else if (output && !strcmp(output, "human")) { 2106 output_format = OFORMAT_HUMAN; 2107 } else if (output) { 2108 error_report("--output must be used with human or json as argument."); 2109 return 1; 2110 } 2111 2112 list = collect_image_info_list(filename, fmt, chain); 2113 if (!list) { 2114 return 1; 2115 } 2116 2117 switch (output_format) { 2118 case OFORMAT_HUMAN: 2119 dump_human_image_info_list(list); 2120 break; 2121 case OFORMAT_JSON: 2122 if (chain) { 2123 dump_json_image_info_list(list); 2124 } else { 2125 dump_json_image_info(list->value); 2126 } 2127 break; 2128 } 2129 2130 qapi_free_ImageInfoList(list); 2131 return 0; 2132 } 2133 2134 2135 typedef struct MapEntry { 2136 int flags; 2137 int depth; 2138 int64_t start; 2139 int64_t length; 2140 int64_t offset; 2141 BlockDriverState *bs; 2142 } MapEntry; 2143 2144 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2145 MapEntry *next) 2146 { 2147 switch (output_format) { 2148 case OFORMAT_HUMAN: 2149 if ((e->flags & BDRV_BLOCK_DATA) && 2150 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2151 error_report("File contains external, encrypted or compressed clusters."); 2152 exit(1); 2153 } 2154 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2155 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2156 e->start, e->length, e->offset, e->bs->filename); 2157 } 2158 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2159 * Modify the flags here to allow more coalescing. 2160 */ 2161 if (next && 2162 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2163 next->flags &= ~BDRV_BLOCK_DATA; 2164 next->flags |= BDRV_BLOCK_ZERO; 2165 } 2166 break; 2167 case OFORMAT_JSON: 2168 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2169 " \"zero\": %s, \"data\": %s", 2170 (e->start == 0 ? "[" : ",\n"), 2171 e->start, e->length, e->depth, 2172 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2173 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2174 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2175 printf(", \"offset\": %"PRId64"", e->offset); 2176 } 2177 putchar('}'); 2178 2179 if (!next) { 2180 printf("]\n"); 2181 } 2182 break; 2183 } 2184 } 2185 2186 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2187 int nb_sectors, MapEntry *e) 2188 { 2189 int64_t ret; 2190 int depth; 2191 2192 /* As an optimization, we could cache the current range of unallocated 2193 * clusters in each file of the chain, and avoid querying the same 2194 * range repeatedly. 2195 */ 2196 2197 depth = 0; 2198 for (;;) { 2199 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2200 if (ret < 0) { 2201 return ret; 2202 } 2203 assert(nb_sectors); 2204 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2205 break; 2206 } 2207 bs = bs->backing_hd; 2208 if (bs == NULL) { 2209 ret = 0; 2210 break; 2211 } 2212 2213 depth++; 2214 } 2215 2216 e->start = sector_num * BDRV_SECTOR_SIZE; 2217 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2218 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2219 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2220 e->depth = depth; 2221 e->bs = bs; 2222 return 0; 2223 } 2224 2225 static int img_map(int argc, char **argv) 2226 { 2227 int c; 2228 OutputFormat output_format = OFORMAT_HUMAN; 2229 BlockBackend *blk; 2230 BlockDriverState *bs; 2231 const char *filename, *fmt, *output; 2232 int64_t length; 2233 MapEntry curr = { .length = 0 }, next; 2234 int ret = 0; 2235 2236 fmt = NULL; 2237 output = NULL; 2238 for (;;) { 2239 int option_index = 0; 2240 static const struct option long_options[] = { 2241 {"help", no_argument, 0, 'h'}, 2242 {"format", required_argument, 0, 'f'}, 2243 {"output", required_argument, 0, OPTION_OUTPUT}, 2244 {0, 0, 0, 0} 2245 }; 2246 c = getopt_long(argc, argv, "f:h", 2247 long_options, &option_index); 2248 if (c == -1) { 2249 break; 2250 } 2251 switch (c) { 2252 case '?': 2253 case 'h': 2254 help(); 2255 break; 2256 case 'f': 2257 fmt = optarg; 2258 break; 2259 case OPTION_OUTPUT: 2260 output = optarg; 2261 break; 2262 } 2263 } 2264 if (optind != argc - 1) { 2265 error_exit("Expecting one image file name"); 2266 } 2267 filename = argv[optind]; 2268 2269 if (output && !strcmp(output, "json")) { 2270 output_format = OFORMAT_JSON; 2271 } else if (output && !strcmp(output, "human")) { 2272 output_format = OFORMAT_HUMAN; 2273 } else if (output) { 2274 error_report("--output must be used with human or json as argument."); 2275 return 1; 2276 } 2277 2278 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2279 if (!blk) { 2280 return 1; 2281 } 2282 bs = blk_bs(blk); 2283 2284 if (output_format == OFORMAT_HUMAN) { 2285 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2286 } 2287 2288 length = blk_getlength(blk); 2289 while (curr.start + curr.length < length) { 2290 int64_t nsectors_left; 2291 int64_t sector_num; 2292 int n; 2293 2294 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2295 2296 /* Probe up to 1 GiB at a time. */ 2297 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2298 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2299 ret = get_block_status(bs, sector_num, n, &next); 2300 2301 if (ret < 0) { 2302 error_report("Could not read file metadata: %s", strerror(-ret)); 2303 goto out; 2304 } 2305 2306 if (curr.length != 0 && curr.flags == next.flags && 2307 curr.depth == next.depth && 2308 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2309 curr.offset + curr.length == next.offset)) { 2310 curr.length += next.length; 2311 continue; 2312 } 2313 2314 if (curr.length > 0) { 2315 dump_map_entry(output_format, &curr, &next); 2316 } 2317 curr = next; 2318 } 2319 2320 dump_map_entry(output_format, &curr, NULL); 2321 2322 out: 2323 blk_unref(blk); 2324 return ret < 0; 2325 } 2326 2327 #define SNAPSHOT_LIST 1 2328 #define SNAPSHOT_CREATE 2 2329 #define SNAPSHOT_APPLY 3 2330 #define SNAPSHOT_DELETE 4 2331 2332 static int img_snapshot(int argc, char **argv) 2333 { 2334 BlockBackend *blk; 2335 BlockDriverState *bs; 2336 QEMUSnapshotInfo sn; 2337 char *filename, *snapshot_name = NULL; 2338 int c, ret = 0, bdrv_oflags; 2339 int action = 0; 2340 qemu_timeval tv; 2341 bool quiet = false; 2342 Error *err = NULL; 2343 2344 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2345 /* Parse commandline parameters */ 2346 for(;;) { 2347 c = getopt(argc, argv, "la:c:d:hq"); 2348 if (c == -1) { 2349 break; 2350 } 2351 switch(c) { 2352 case '?': 2353 case 'h': 2354 help(); 2355 return 0; 2356 case 'l': 2357 if (action) { 2358 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2359 return 0; 2360 } 2361 action = SNAPSHOT_LIST; 2362 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2363 break; 2364 case 'a': 2365 if (action) { 2366 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2367 return 0; 2368 } 2369 action = SNAPSHOT_APPLY; 2370 snapshot_name = optarg; 2371 break; 2372 case 'c': 2373 if (action) { 2374 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2375 return 0; 2376 } 2377 action = SNAPSHOT_CREATE; 2378 snapshot_name = optarg; 2379 break; 2380 case 'd': 2381 if (action) { 2382 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2383 return 0; 2384 } 2385 action = SNAPSHOT_DELETE; 2386 snapshot_name = optarg; 2387 break; 2388 case 'q': 2389 quiet = true; 2390 break; 2391 } 2392 } 2393 2394 if (optind != argc - 1) { 2395 error_exit("Expecting one image file name"); 2396 } 2397 filename = argv[optind++]; 2398 2399 /* Open the image */ 2400 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2401 if (!blk) { 2402 return 1; 2403 } 2404 bs = blk_bs(blk); 2405 2406 /* Perform the requested action */ 2407 switch(action) { 2408 case SNAPSHOT_LIST: 2409 dump_snapshots(bs); 2410 break; 2411 2412 case SNAPSHOT_CREATE: 2413 memset(&sn, 0, sizeof(sn)); 2414 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2415 2416 qemu_gettimeofday(&tv); 2417 sn.date_sec = tv.tv_sec; 2418 sn.date_nsec = tv.tv_usec * 1000; 2419 2420 ret = bdrv_snapshot_create(bs, &sn); 2421 if (ret) { 2422 error_report("Could not create snapshot '%s': %d (%s)", 2423 snapshot_name, ret, strerror(-ret)); 2424 } 2425 break; 2426 2427 case SNAPSHOT_APPLY: 2428 ret = bdrv_snapshot_goto(bs, snapshot_name); 2429 if (ret) { 2430 error_report("Could not apply snapshot '%s': %d (%s)", 2431 snapshot_name, ret, strerror(-ret)); 2432 } 2433 break; 2434 2435 case SNAPSHOT_DELETE: 2436 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2437 if (err) { 2438 error_report("Could not delete snapshot '%s': (%s)", 2439 snapshot_name, error_get_pretty(err)); 2440 error_free(err); 2441 ret = 1; 2442 } 2443 break; 2444 } 2445 2446 /* Cleanup */ 2447 blk_unref(blk); 2448 if (ret) { 2449 return 1; 2450 } 2451 return 0; 2452 } 2453 2454 static int img_rebase(int argc, char **argv) 2455 { 2456 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2457 BlockDriverState *bs = NULL; 2458 char *filename; 2459 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2460 int c, flags, src_flags, ret; 2461 int unsafe = 0; 2462 int progress = 0; 2463 bool quiet = false; 2464 Error *local_err = NULL; 2465 2466 /* Parse commandline parameters */ 2467 fmt = NULL; 2468 cache = BDRV_DEFAULT_CACHE; 2469 src_cache = BDRV_DEFAULT_CACHE; 2470 out_baseimg = NULL; 2471 out_basefmt = NULL; 2472 for(;;) { 2473 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2474 if (c == -1) { 2475 break; 2476 } 2477 switch(c) { 2478 case '?': 2479 case 'h': 2480 help(); 2481 return 0; 2482 case 'f': 2483 fmt = optarg; 2484 break; 2485 case 'F': 2486 out_basefmt = optarg; 2487 break; 2488 case 'b': 2489 out_baseimg = optarg; 2490 break; 2491 case 'u': 2492 unsafe = 1; 2493 break; 2494 case 'p': 2495 progress = 1; 2496 break; 2497 case 't': 2498 cache = optarg; 2499 break; 2500 case 'T': 2501 src_cache = optarg; 2502 break; 2503 case 'q': 2504 quiet = true; 2505 break; 2506 } 2507 } 2508 2509 if (quiet) { 2510 progress = 0; 2511 } 2512 2513 if (optind != argc - 1) { 2514 error_exit("Expecting one image file name"); 2515 } 2516 if (!unsafe && !out_baseimg) { 2517 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2518 } 2519 filename = argv[optind++]; 2520 2521 qemu_progress_init(progress, 2.0); 2522 qemu_progress_print(0, 100); 2523 2524 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2525 ret = bdrv_parse_cache_flags(cache, &flags); 2526 if (ret < 0) { 2527 error_report("Invalid cache option: %s", cache); 2528 goto out; 2529 } 2530 2531 src_flags = BDRV_O_FLAGS; 2532 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2533 if (ret < 0) { 2534 error_report("Invalid source cache option: %s", src_cache); 2535 goto out; 2536 } 2537 2538 /* 2539 * Open the images. 2540 * 2541 * Ignore the old backing file for unsafe rebase in case we want to correct 2542 * the reference to a renamed or moved backing file. 2543 */ 2544 blk = img_open("image", filename, fmt, flags, true, quiet); 2545 if (!blk) { 2546 ret = -1; 2547 goto out; 2548 } 2549 bs = blk_bs(blk); 2550 2551 if (out_basefmt != NULL) { 2552 if (bdrv_find_format(out_basefmt) == NULL) { 2553 error_report("Invalid format name: '%s'", out_basefmt); 2554 ret = -1; 2555 goto out; 2556 } 2557 } 2558 2559 /* For safe rebasing we need to compare old and new backing file */ 2560 if (!unsafe) { 2561 char backing_name[PATH_MAX]; 2562 QDict *options = NULL; 2563 2564 if (bs->backing_format[0] != '\0') { 2565 options = qdict_new(); 2566 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2567 } 2568 2569 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2570 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2571 options, src_flags, &local_err); 2572 if (!blk_old_backing) { 2573 error_report("Could not open old backing file '%s': %s", 2574 backing_name, error_get_pretty(local_err)); 2575 error_free(local_err); 2576 goto out; 2577 } 2578 2579 if (out_baseimg[0]) { 2580 if (out_basefmt) { 2581 options = qdict_new(); 2582 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2583 } else { 2584 options = NULL; 2585 } 2586 2587 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2588 options, src_flags, &local_err); 2589 if (!blk_new_backing) { 2590 error_report("Could not open new backing file '%s': %s", 2591 out_baseimg, error_get_pretty(local_err)); 2592 error_free(local_err); 2593 goto out; 2594 } 2595 } 2596 } 2597 2598 /* 2599 * Check each unallocated cluster in the COW file. If it is unallocated, 2600 * accesses go to the backing file. We must therefore compare this cluster 2601 * in the old and new backing file, and if they differ we need to copy it 2602 * from the old backing file into the COW file. 2603 * 2604 * If qemu-img crashes during this step, no harm is done. The content of 2605 * the image is the same as the original one at any time. 2606 */ 2607 if (!unsafe) { 2608 int64_t num_sectors; 2609 int64_t old_backing_num_sectors; 2610 int64_t new_backing_num_sectors = 0; 2611 uint64_t sector; 2612 int n; 2613 uint8_t * buf_old; 2614 uint8_t * buf_new; 2615 float local_progress = 0; 2616 2617 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2618 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2619 2620 num_sectors = blk_nb_sectors(blk); 2621 if (num_sectors < 0) { 2622 error_report("Could not get size of '%s': %s", 2623 filename, strerror(-num_sectors)); 2624 ret = -1; 2625 goto out; 2626 } 2627 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2628 if (old_backing_num_sectors < 0) { 2629 char backing_name[PATH_MAX]; 2630 2631 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2632 error_report("Could not get size of '%s': %s", 2633 backing_name, strerror(-old_backing_num_sectors)); 2634 ret = -1; 2635 goto out; 2636 } 2637 if (blk_new_backing) { 2638 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2639 if (new_backing_num_sectors < 0) { 2640 error_report("Could not get size of '%s': %s", 2641 out_baseimg, strerror(-new_backing_num_sectors)); 2642 ret = -1; 2643 goto out; 2644 } 2645 } 2646 2647 if (num_sectors != 0) { 2648 local_progress = (float)100 / 2649 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2650 } 2651 2652 for (sector = 0; sector < num_sectors; sector += n) { 2653 2654 /* How many sectors can we handle with the next read? */ 2655 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2656 n = (IO_BUF_SIZE / 512); 2657 } else { 2658 n = num_sectors - sector; 2659 } 2660 2661 /* If the cluster is allocated, we don't need to take action */ 2662 ret = bdrv_is_allocated(bs, sector, n, &n); 2663 if (ret < 0) { 2664 error_report("error while reading image metadata: %s", 2665 strerror(-ret)); 2666 goto out; 2667 } 2668 if (ret) { 2669 continue; 2670 } 2671 2672 /* 2673 * Read old and new backing file and take into consideration that 2674 * backing files may be smaller than the COW image. 2675 */ 2676 if (sector >= old_backing_num_sectors) { 2677 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2678 } else { 2679 if (sector + n > old_backing_num_sectors) { 2680 n = old_backing_num_sectors - sector; 2681 } 2682 2683 ret = blk_read(blk_old_backing, sector, buf_old, n); 2684 if (ret < 0) { 2685 error_report("error while reading from old backing file"); 2686 goto out; 2687 } 2688 } 2689 2690 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2691 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2692 } else { 2693 if (sector + n > new_backing_num_sectors) { 2694 n = new_backing_num_sectors - sector; 2695 } 2696 2697 ret = blk_read(blk_new_backing, sector, buf_new, n); 2698 if (ret < 0) { 2699 error_report("error while reading from new backing file"); 2700 goto out; 2701 } 2702 } 2703 2704 /* If they differ, we need to write to the COW file */ 2705 uint64_t written = 0; 2706 2707 while (written < n) { 2708 int pnum; 2709 2710 if (compare_sectors(buf_old + written * 512, 2711 buf_new + written * 512, n - written, &pnum)) 2712 { 2713 ret = blk_write(blk, sector + written, 2714 buf_old + written * 512, pnum); 2715 if (ret < 0) { 2716 error_report("Error while writing to COW image: %s", 2717 strerror(-ret)); 2718 goto out; 2719 } 2720 } 2721 2722 written += pnum; 2723 } 2724 qemu_progress_print(local_progress, 100); 2725 } 2726 2727 qemu_vfree(buf_old); 2728 qemu_vfree(buf_new); 2729 } 2730 2731 /* 2732 * Change the backing file. All clusters that are different from the old 2733 * backing file are overwritten in the COW file now, so the visible content 2734 * doesn't change when we switch the backing file. 2735 */ 2736 if (out_baseimg && *out_baseimg) { 2737 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2738 } else { 2739 ret = bdrv_change_backing_file(bs, NULL, NULL); 2740 } 2741 2742 if (ret == -ENOSPC) { 2743 error_report("Could not change the backing file to '%s': No " 2744 "space left in the file header", out_baseimg); 2745 } else if (ret < 0) { 2746 error_report("Could not change the backing file to '%s': %s", 2747 out_baseimg, strerror(-ret)); 2748 } 2749 2750 qemu_progress_print(100, 0); 2751 /* 2752 * TODO At this point it is possible to check if any clusters that are 2753 * allocated in the COW file are the same in the backing file. If so, they 2754 * could be dropped from the COW file. Don't do this before switching the 2755 * backing file, in case of a crash this would lead to corruption. 2756 */ 2757 out: 2758 qemu_progress_end(); 2759 /* Cleanup */ 2760 if (!unsafe) { 2761 blk_unref(blk_old_backing); 2762 blk_unref(blk_new_backing); 2763 } 2764 2765 blk_unref(blk); 2766 if (ret) { 2767 return 1; 2768 } 2769 return 0; 2770 } 2771 2772 static int img_resize(int argc, char **argv) 2773 { 2774 Error *err = NULL; 2775 int c, ret, relative; 2776 const char *filename, *fmt, *size; 2777 int64_t n, total_size; 2778 bool quiet = false; 2779 BlockBackend *blk = NULL; 2780 QemuOpts *param; 2781 static QemuOptsList resize_options = { 2782 .name = "resize_options", 2783 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2784 .desc = { 2785 { 2786 .name = BLOCK_OPT_SIZE, 2787 .type = QEMU_OPT_SIZE, 2788 .help = "Virtual disk size" 2789 }, { 2790 /* end of list */ 2791 } 2792 }, 2793 }; 2794 2795 /* Remove size from argv manually so that negative numbers are not treated 2796 * as options by getopt. */ 2797 if (argc < 3) { 2798 error_exit("Not enough arguments"); 2799 return 1; 2800 } 2801 2802 size = argv[--argc]; 2803 2804 /* Parse getopt arguments */ 2805 fmt = NULL; 2806 for(;;) { 2807 c = getopt(argc, argv, "f:hq"); 2808 if (c == -1) { 2809 break; 2810 } 2811 switch(c) { 2812 case '?': 2813 case 'h': 2814 help(); 2815 break; 2816 case 'f': 2817 fmt = optarg; 2818 break; 2819 case 'q': 2820 quiet = true; 2821 break; 2822 } 2823 } 2824 if (optind != argc - 1) { 2825 error_exit("Expecting one image file name"); 2826 } 2827 filename = argv[optind++]; 2828 2829 /* Choose grow, shrink, or absolute resize mode */ 2830 switch (size[0]) { 2831 case '+': 2832 relative = 1; 2833 size++; 2834 break; 2835 case '-': 2836 relative = -1; 2837 size++; 2838 break; 2839 default: 2840 relative = 0; 2841 break; 2842 } 2843 2844 /* Parse size */ 2845 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2846 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2847 if (err) { 2848 error_report_err(err); 2849 ret = -1; 2850 qemu_opts_del(param); 2851 goto out; 2852 } 2853 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2854 qemu_opts_del(param); 2855 2856 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2857 true, quiet); 2858 if (!blk) { 2859 ret = -1; 2860 goto out; 2861 } 2862 2863 if (relative) { 2864 total_size = blk_getlength(blk) + n * relative; 2865 } else { 2866 total_size = n; 2867 } 2868 if (total_size <= 0) { 2869 error_report("New image size must be positive"); 2870 ret = -1; 2871 goto out; 2872 } 2873 2874 ret = blk_truncate(blk, total_size); 2875 switch (ret) { 2876 case 0: 2877 qprintf(quiet, "Image resized.\n"); 2878 break; 2879 case -ENOTSUP: 2880 error_report("This image does not support resize"); 2881 break; 2882 case -EACCES: 2883 error_report("Image is read-only"); 2884 break; 2885 default: 2886 error_report("Error resizing image (%d)", -ret); 2887 break; 2888 } 2889 out: 2890 blk_unref(blk); 2891 if (ret) { 2892 return 1; 2893 } 2894 return 0; 2895 } 2896 2897 static void amend_status_cb(BlockDriverState *bs, 2898 int64_t offset, int64_t total_work_size) 2899 { 2900 qemu_progress_print(100.f * offset / total_work_size, 0); 2901 } 2902 2903 static int img_amend(int argc, char **argv) 2904 { 2905 Error *err = NULL; 2906 int c, ret = 0; 2907 char *options = NULL; 2908 QemuOptsList *create_opts = NULL; 2909 QemuOpts *opts = NULL; 2910 const char *fmt = NULL, *filename, *cache; 2911 int flags; 2912 bool quiet = false, progress = false; 2913 BlockBackend *blk = NULL; 2914 BlockDriverState *bs = NULL; 2915 2916 cache = BDRV_DEFAULT_CACHE; 2917 for (;;) { 2918 c = getopt(argc, argv, "ho:f:t:pq"); 2919 if (c == -1) { 2920 break; 2921 } 2922 2923 switch (c) { 2924 case 'h': 2925 case '?': 2926 help(); 2927 break; 2928 case 'o': 2929 if (!is_valid_option_list(optarg)) { 2930 error_report("Invalid option list: %s", optarg); 2931 ret = -1; 2932 goto out; 2933 } 2934 if (!options) { 2935 options = g_strdup(optarg); 2936 } else { 2937 char *old_options = options; 2938 options = g_strdup_printf("%s,%s", options, optarg); 2939 g_free(old_options); 2940 } 2941 break; 2942 case 'f': 2943 fmt = optarg; 2944 break; 2945 case 't': 2946 cache = optarg; 2947 break; 2948 case 'p': 2949 progress = true; 2950 break; 2951 case 'q': 2952 quiet = true; 2953 break; 2954 } 2955 } 2956 2957 if (!options) { 2958 error_exit("Must specify options (-o)"); 2959 } 2960 2961 if (quiet) { 2962 progress = false; 2963 } 2964 qemu_progress_init(progress, 1.0); 2965 2966 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2967 if (fmt && has_help_option(options)) { 2968 /* If a format is explicitly specified (and possibly no filename is 2969 * given), print option help here */ 2970 ret = print_block_option_help(filename, fmt); 2971 goto out; 2972 } 2973 2974 if (optind != argc - 1) { 2975 error_report("Expecting one image file name"); 2976 ret = -1; 2977 goto out; 2978 } 2979 2980 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2981 ret = bdrv_parse_cache_flags(cache, &flags); 2982 if (ret < 0) { 2983 error_report("Invalid cache option: %s", cache); 2984 goto out; 2985 } 2986 2987 blk = img_open("image", filename, fmt, flags, true, quiet); 2988 if (!blk) { 2989 ret = -1; 2990 goto out; 2991 } 2992 bs = blk_bs(blk); 2993 2994 fmt = bs->drv->format_name; 2995 2996 if (has_help_option(options)) { 2997 /* If the format was auto-detected, print option help here */ 2998 ret = print_block_option_help(filename, fmt); 2999 goto out; 3000 } 3001 3002 if (!bs->drv->create_opts) { 3003 error_report("Format driver '%s' does not support any options to amend", 3004 fmt); 3005 ret = -1; 3006 goto out; 3007 } 3008 3009 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3010 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3011 if (options) { 3012 qemu_opts_do_parse(opts, options, NULL, &err); 3013 if (err) { 3014 error_report_err(err); 3015 ret = -1; 3016 goto out; 3017 } 3018 } 3019 3020 /* In case the driver does not call amend_status_cb() */ 3021 qemu_progress_print(0.f, 0); 3022 ret = bdrv_amend_options(bs, opts, &amend_status_cb); 3023 qemu_progress_print(100.f, 0); 3024 if (ret < 0) { 3025 error_report("Error while amending options: %s", strerror(-ret)); 3026 goto out; 3027 } 3028 3029 out: 3030 qemu_progress_end(); 3031 3032 blk_unref(blk); 3033 qemu_opts_del(opts); 3034 qemu_opts_free(create_opts); 3035 g_free(options); 3036 3037 if (ret) { 3038 return 1; 3039 } 3040 return 0; 3041 } 3042 3043 static const img_cmd_t img_cmds[] = { 3044 #define DEF(option, callback, arg_string) \ 3045 { option, callback }, 3046 #include "qemu-img-cmds.h" 3047 #undef DEF 3048 #undef GEN_DOCS 3049 { NULL, NULL, }, 3050 }; 3051 3052 int main(int argc, char **argv) 3053 { 3054 const img_cmd_t *cmd; 3055 const char *cmdname; 3056 Error *local_error = NULL; 3057 int c; 3058 static const struct option long_options[] = { 3059 {"help", no_argument, 0, 'h'}, 3060 {"version", no_argument, 0, 'v'}, 3061 {0, 0, 0, 0} 3062 }; 3063 3064 #ifdef CONFIG_POSIX 3065 signal(SIGPIPE, SIG_IGN); 3066 #endif 3067 3068 error_set_progname(argv[0]); 3069 qemu_init_exec_dir(argv[0]); 3070 3071 if (qemu_init_main_loop(&local_error)) { 3072 error_report_err(local_error); 3073 exit(EXIT_FAILURE); 3074 } 3075 3076 bdrv_init(); 3077 if (argc < 2) { 3078 error_exit("Not enough arguments"); 3079 } 3080 cmdname = argv[1]; 3081 3082 /* find the command */ 3083 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3084 if (!strcmp(cmdname, cmd->name)) { 3085 return cmd->handler(argc - 1, argv + 1); 3086 } 3087 } 3088 3089 c = getopt_long(argc, argv, "h", long_options, NULL); 3090 3091 if (c == 'h') { 3092 help(); 3093 } 3094 if (c == 'v') { 3095 printf(QEMU_IMG_VERSION); 3096 return 0; 3097 } 3098 3099 /* not found */ 3100 error_exit("Command not found: %s", cmdname); 3101 } 3102