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/qerror.h" 27 #include "qapi/qmp/qjson.h" 28 #include "qemu-common.h" 29 #include "qemu/option.h" 30 #include "qemu/error-report.h" 31 #include "qemu/osdep.h" 32 #include "sysemu/sysemu.h" 33 #include "sysemu/block-backend.h" 34 #include "block/block_int.h" 35 #include "block/blockjob.h" 36 #include "block/qapi.h" 37 #include <getopt.h> 38 39 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 40 ", Copyright (c) 2004-2008 Fabrice Bellard\n" 41 42 typedef struct img_cmd_t { 43 const char *name; 44 int (*handler)(int argc, char **argv); 45 } img_cmd_t; 46 47 enum { 48 OPTION_OUTPUT = 256, 49 OPTION_BACKING_CHAIN = 257, 50 }; 51 52 typedef enum OutputFormat { 53 OFORMAT_JSON, 54 OFORMAT_HUMAN, 55 } OutputFormat; 56 57 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ 58 #define BDRV_O_FLAGS BDRV_O_CACHE_WB 59 #define BDRV_DEFAULT_CACHE "writeback" 60 61 static void format_print(void *opaque, const char *name) 62 { 63 printf(" %s", name); 64 } 65 66 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 67 { 68 va_list ap; 69 70 error_printf("qemu-img: "); 71 72 va_start(ap, fmt); 73 error_vprintf(fmt, ap); 74 va_end(ap); 75 76 error_printf("\nTry 'qemu-img --help' for more information\n"); 77 exit(EXIT_FAILURE); 78 } 79 80 /* Please keep in synch with qemu-img.texi */ 81 static void QEMU_NORETURN help(void) 82 { 83 const char *help_msg = 84 QEMU_IMG_VERSION 85 "usage: qemu-img command [command options]\n" 86 "QEMU disk image utility\n" 87 "\n" 88 "Command syntax:\n" 89 #define DEF(option, callback, arg_string) \ 90 " " arg_string "\n" 91 #include "qemu-img-cmds.h" 92 #undef DEF 93 #undef GEN_DOCS 94 "\n" 95 "Command parameters:\n" 96 " 'filename' is a disk image filename\n" 97 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 98 " 'cache' is the cache mode used to write the output disk image, the valid\n" 99 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 100 " 'directsync' and 'unsafe' (default for convert)\n" 101 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 102 " options are the same as for the 'cache' option\n" 103 " 'size' is the disk image size in bytes. Optional suffixes\n" 104 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 105 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 106 " supported. 'b' is ignored.\n" 107 " 'output_filename' is the destination disk image filename\n" 108 " 'output_fmt' is the destination format\n" 109 " 'options' is a comma separated list of format specific options in a\n" 110 " name=value format. Use -o ? for an overview of the options supported by the\n" 111 " used format\n" 112 " 'snapshot_param' is param used for internal snapshot, format\n" 113 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 114 " '[ID_OR_NAME]'\n" 115 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 116 " instead\n" 117 " '-c' indicates that target image must be compressed (qcow format only)\n" 118 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 119 " match exactly. The image doesn't need a working backing file before\n" 120 " rebasing in this case (useful for renaming the backing file)\n" 121 " '-h' with or without a command shows this help and lists the supported formats\n" 122 " '-p' show progress of command (only certain commands)\n" 123 " '-q' use Quiet mode - do not print any output (except errors)\n" 124 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 125 " contain only zeros for qemu-img to create a sparse image during\n" 126 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 127 " unallocated or zero sectors, and the destination image will always be\n" 128 " fully allocated\n" 129 " '--output' takes the format in which the output must be done (human or json)\n" 130 " '-n' skips the target volume creation (useful if the volume is created\n" 131 " prior to running qemu-img)\n" 132 "\n" 133 "Parameters to check subcommand:\n" 134 " '-r' tries to repair any inconsistencies that are found during the check.\n" 135 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 136 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 137 " hiding corruption that has already occurred.\n" 138 "\n" 139 "Parameters to snapshot subcommand:\n" 140 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 141 " '-a' applies a snapshot (revert disk to saved state)\n" 142 " '-c' creates a snapshot\n" 143 " '-d' deletes a snapshot\n" 144 " '-l' lists all snapshots in the given image\n" 145 "\n" 146 "Parameters to compare subcommand:\n" 147 " '-f' first image format\n" 148 " '-F' second image format\n" 149 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 150 151 printf("%s\nSupported formats:", help_msg); 152 bdrv_iterate_format(format_print, NULL); 153 printf("\n"); 154 exit(EXIT_SUCCESS); 155 } 156 157 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 158 { 159 int ret = 0; 160 if (!quiet) { 161 va_list args; 162 va_start(args, fmt); 163 ret = vprintf(fmt, args); 164 va_end(args); 165 } 166 return ret; 167 } 168 169 170 static int print_block_option_help(const char *filename, const char *fmt) 171 { 172 BlockDriver *drv, *proto_drv; 173 QemuOptsList *create_opts = NULL; 174 Error *local_err = NULL; 175 176 /* Find driver and parse its options */ 177 drv = bdrv_find_format(fmt); 178 if (!drv) { 179 error_report("Unknown file format '%s'", fmt); 180 return 1; 181 } 182 183 create_opts = qemu_opts_append(create_opts, drv->create_opts); 184 if (filename) { 185 proto_drv = bdrv_find_protocol(filename, true, &local_err); 186 if (!proto_drv) { 187 error_report_err(local_err); 188 qemu_opts_free(create_opts); 189 return 1; 190 } 191 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 192 } 193 194 qemu_opts_print_help(create_opts); 195 qemu_opts_free(create_opts); 196 return 0; 197 } 198 199 static BlockBackend *img_open(const char *id, const char *filename, 200 const char *fmt, int flags, 201 bool require_io, bool quiet) 202 { 203 BlockBackend *blk; 204 BlockDriverState *bs; 205 char password[256]; 206 Error *local_err = NULL; 207 QDict *options = NULL; 208 209 if (fmt) { 210 options = qdict_new(); 211 qdict_put(options, "driver", qstring_from_str(fmt)); 212 } 213 214 blk = blk_new_open(id, filename, NULL, options, flags, &local_err); 215 if (!blk) { 216 error_reportf_err(local_err, "Could not open '%s': ", filename); 217 goto fail; 218 } 219 220 bs = blk_bs(blk); 221 if (bdrv_is_encrypted(bs) && require_io) { 222 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 223 if (qemu_read_password(password, sizeof(password)) < 0) { 224 error_report("No password given"); 225 goto fail; 226 } 227 if (bdrv_set_key(bs, password) < 0) { 228 error_report("invalid password"); 229 goto fail; 230 } 231 } 232 return blk; 233 fail: 234 blk_unref(blk); 235 return NULL; 236 } 237 238 static int add_old_style_options(const char *fmt, QemuOpts *opts, 239 const char *base_filename, 240 const char *base_fmt) 241 { 242 Error *err = NULL; 243 244 if (base_filename) { 245 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 246 if (err) { 247 error_report("Backing file not supported for file format '%s'", 248 fmt); 249 error_free(err); 250 return -1; 251 } 252 } 253 if (base_fmt) { 254 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 255 if (err) { 256 error_report("Backing file format not supported for file " 257 "format '%s'", fmt); 258 error_free(err); 259 return -1; 260 } 261 } 262 return 0; 263 } 264 265 static int img_create(int argc, char **argv) 266 { 267 int c; 268 uint64_t img_size = -1; 269 const char *fmt = "raw"; 270 const char *base_fmt = NULL; 271 const char *filename; 272 const char *base_filename = NULL; 273 char *options = NULL; 274 Error *local_err = NULL; 275 bool quiet = false; 276 277 for(;;) { 278 c = getopt(argc, argv, "F:b:f:he6o:q"); 279 if (c == -1) { 280 break; 281 } 282 switch(c) { 283 case '?': 284 case 'h': 285 help(); 286 break; 287 case 'F': 288 base_fmt = optarg; 289 break; 290 case 'b': 291 base_filename = optarg; 292 break; 293 case 'f': 294 fmt = optarg; 295 break; 296 case 'e': 297 error_report("option -e is deprecated, please use \'-o " 298 "encryption\' instead!"); 299 goto fail; 300 case '6': 301 error_report("option -6 is deprecated, please use \'-o " 302 "compat6\' instead!"); 303 goto fail; 304 case 'o': 305 if (!is_valid_option_list(optarg)) { 306 error_report("Invalid option list: %s", optarg); 307 goto fail; 308 } 309 if (!options) { 310 options = g_strdup(optarg); 311 } else { 312 char *old_options = options; 313 options = g_strdup_printf("%s,%s", options, optarg); 314 g_free(old_options); 315 } 316 break; 317 case 'q': 318 quiet = true; 319 break; 320 } 321 } 322 323 /* Get the filename */ 324 filename = (optind < argc) ? argv[optind] : NULL; 325 if (options && has_help_option(options)) { 326 g_free(options); 327 return print_block_option_help(filename, fmt); 328 } 329 330 if (optind >= argc) { 331 error_exit("Expecting image file name"); 332 } 333 optind++; 334 335 /* Get image size, if specified */ 336 if (optind < argc) { 337 int64_t sval; 338 char *end; 339 sval = qemu_strtosz_suffix(argv[optind++], &end, 340 QEMU_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_reportf_err(local_err, "%s: ", filename); 362 goto fail; 363 } 364 365 g_free(options); 366 return 0; 367 368 fail: 369 g_free(options); 370 return 1; 371 } 372 373 static void dump_json_image_check(ImageCheck *check, bool quiet) 374 { 375 Error *local_err = NULL; 376 QString *str; 377 QmpOutputVisitor *ov = qmp_output_visitor_new(); 378 QObject *obj; 379 visit_type_ImageCheck(qmp_output_get_visitor(ov), 380 &check, NULL, &local_err); 381 obj = qmp_output_get_qobject(ov); 382 str = qobject_to_json_pretty(obj); 383 assert(str != NULL); 384 qprintf(quiet, "%s\n", qstring_get_str(str)); 385 qobject_decref(obj); 386 qmp_output_visitor_cleanup(ov); 387 QDECREF(str); 388 } 389 390 static void dump_human_image_check(ImageCheck *check, bool quiet) 391 { 392 if (!(check->corruptions || check->leaks || check->check_errors)) { 393 qprintf(quiet, "No errors were found on the image.\n"); 394 } else { 395 if (check->corruptions) { 396 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 397 "Data may be corrupted, or further writes to the image " 398 "may corrupt it.\n", 399 check->corruptions); 400 } 401 402 if (check->leaks) { 403 qprintf(quiet, 404 "\n%" PRId64 " leaked clusters were found on the image.\n" 405 "This means waste of disk space, but no harm to data.\n", 406 check->leaks); 407 } 408 409 if (check->check_errors) { 410 qprintf(quiet, 411 "\n%" PRId64 412 " internal errors have occurred during the check.\n", 413 check->check_errors); 414 } 415 } 416 417 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 418 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 419 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 420 check->allocated_clusters, check->total_clusters, 421 check->allocated_clusters * 100.0 / check->total_clusters, 422 check->fragmented_clusters * 100.0 / check->allocated_clusters, 423 check->compressed_clusters * 100.0 / 424 check->allocated_clusters); 425 } 426 427 if (check->image_end_offset) { 428 qprintf(quiet, 429 "Image end offset: %" PRId64 "\n", check->image_end_offset); 430 } 431 } 432 433 static int collect_image_check(BlockDriverState *bs, 434 ImageCheck *check, 435 const char *filename, 436 const char *fmt, 437 int fix) 438 { 439 int ret; 440 BdrvCheckResult result; 441 442 ret = bdrv_check(bs, &result, fix); 443 if (ret < 0) { 444 return ret; 445 } 446 447 check->filename = g_strdup(filename); 448 check->format = g_strdup(bdrv_get_format_name(bs)); 449 check->check_errors = result.check_errors; 450 check->corruptions = result.corruptions; 451 check->has_corruptions = result.corruptions != 0; 452 check->leaks = result.leaks; 453 check->has_leaks = result.leaks != 0; 454 check->corruptions_fixed = result.corruptions_fixed; 455 check->has_corruptions_fixed = result.corruptions != 0; 456 check->leaks_fixed = result.leaks_fixed; 457 check->has_leaks_fixed = result.leaks != 0; 458 check->image_end_offset = result.image_end_offset; 459 check->has_image_end_offset = result.image_end_offset != 0; 460 check->total_clusters = result.bfi.total_clusters; 461 check->has_total_clusters = result.bfi.total_clusters != 0; 462 check->allocated_clusters = result.bfi.allocated_clusters; 463 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 464 check->fragmented_clusters = result.bfi.fragmented_clusters; 465 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 466 check->compressed_clusters = result.bfi.compressed_clusters; 467 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 468 469 return 0; 470 } 471 472 /* 473 * Checks an image for consistency. Exit codes: 474 * 475 * 0 - Check completed, image is good 476 * 1 - Check not completed because of internal errors 477 * 2 - Check completed, image is corrupted 478 * 3 - Check completed, image has leaked clusters, but is good otherwise 479 * 63 - Checks are not supported by the image format 480 */ 481 static int img_check(int argc, char **argv) 482 { 483 int c, ret; 484 OutputFormat output_format = OFORMAT_HUMAN; 485 const char *filename, *fmt, *output, *cache; 486 BlockBackend *blk; 487 BlockDriverState *bs; 488 int fix = 0; 489 int flags = BDRV_O_FLAGS | BDRV_O_CHECK; 490 ImageCheck *check; 491 bool quiet = false; 492 493 fmt = NULL; 494 output = NULL; 495 cache = BDRV_DEFAULT_CACHE; 496 for(;;) { 497 int option_index = 0; 498 static const struct option long_options[] = { 499 {"help", no_argument, 0, 'h'}, 500 {"format", required_argument, 0, 'f'}, 501 {"repair", required_argument, 0, 'r'}, 502 {"output", required_argument, 0, OPTION_OUTPUT}, 503 {0, 0, 0, 0} 504 }; 505 c = getopt_long(argc, argv, "hf:r:T:q", 506 long_options, &option_index); 507 if (c == -1) { 508 break; 509 } 510 switch(c) { 511 case '?': 512 case 'h': 513 help(); 514 break; 515 case 'f': 516 fmt = optarg; 517 break; 518 case 'r': 519 flags |= BDRV_O_RDWR; 520 521 if (!strcmp(optarg, "leaks")) { 522 fix = BDRV_FIX_LEAKS; 523 } else if (!strcmp(optarg, "all")) { 524 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 525 } else { 526 error_exit("Unknown option value for -r " 527 "(expecting 'leaks' or 'all'): %s", optarg); 528 } 529 break; 530 case OPTION_OUTPUT: 531 output = optarg; 532 break; 533 case 'T': 534 cache = optarg; 535 break; 536 case 'q': 537 quiet = true; 538 break; 539 } 540 } 541 if (optind != argc - 1) { 542 error_exit("Expecting one image file name"); 543 } 544 filename = argv[optind++]; 545 546 if (output && !strcmp(output, "json")) { 547 output_format = OFORMAT_JSON; 548 } else if (output && !strcmp(output, "human")) { 549 output_format = OFORMAT_HUMAN; 550 } else if (output) { 551 error_report("--output must be used with human or json as argument."); 552 return 1; 553 } 554 555 ret = bdrv_parse_cache_flags(cache, &flags); 556 if (ret < 0) { 557 error_report("Invalid source cache option: %s", cache); 558 return 1; 559 } 560 561 blk = img_open("image", filename, fmt, flags, true, quiet); 562 if (!blk) { 563 return 1; 564 } 565 bs = blk_bs(blk); 566 567 check = g_new0(ImageCheck, 1); 568 ret = collect_image_check(bs, check, filename, fmt, fix); 569 570 if (ret == -ENOTSUP) { 571 error_report("This image format does not support checks"); 572 ret = 63; 573 goto fail; 574 } 575 576 if (check->corruptions_fixed || check->leaks_fixed) { 577 int corruptions_fixed, leaks_fixed; 578 579 leaks_fixed = check->leaks_fixed; 580 corruptions_fixed = check->corruptions_fixed; 581 582 if (output_format == OFORMAT_HUMAN) { 583 qprintf(quiet, 584 "The following inconsistencies were found and repaired:\n\n" 585 " %" PRId64 " leaked clusters\n" 586 " %" PRId64 " corruptions\n\n" 587 "Double checking the fixed image now...\n", 588 check->leaks_fixed, 589 check->corruptions_fixed); 590 } 591 592 ret = collect_image_check(bs, check, filename, fmt, 0); 593 594 check->leaks_fixed = leaks_fixed; 595 check->corruptions_fixed = corruptions_fixed; 596 } 597 598 if (!ret) { 599 switch (output_format) { 600 case OFORMAT_HUMAN: 601 dump_human_image_check(check, quiet); 602 break; 603 case OFORMAT_JSON: 604 dump_json_image_check(check, quiet); 605 break; 606 } 607 } 608 609 if (ret || check->check_errors) { 610 if (ret) { 611 error_report("Check failed: %s", strerror(-ret)); 612 } else { 613 error_report("Check failed"); 614 } 615 ret = 1; 616 goto fail; 617 } 618 619 if (check->corruptions) { 620 ret = 2; 621 } else if (check->leaks) { 622 ret = 3; 623 } else { 624 ret = 0; 625 } 626 627 fail: 628 qapi_free_ImageCheck(check); 629 blk_unref(blk); 630 return ret; 631 } 632 633 typedef struct CommonBlockJobCBInfo { 634 BlockDriverState *bs; 635 Error **errp; 636 } CommonBlockJobCBInfo; 637 638 static void common_block_job_cb(void *opaque, int ret) 639 { 640 CommonBlockJobCBInfo *cbi = opaque; 641 642 if (ret < 0) { 643 error_setg_errno(cbi->errp, -ret, "Block job failed"); 644 } 645 } 646 647 static void run_block_job(BlockJob *job, Error **errp) 648 { 649 AioContext *aio_context = bdrv_get_aio_context(job->bs); 650 651 do { 652 aio_poll(aio_context, true); 653 qemu_progress_print(job->len ? 654 ((float)job->offset / job->len * 100.f) : 0.0f, 0); 655 } while (!job->ready); 656 657 block_job_complete_sync(job, errp); 658 659 /* A block job may finish instantaneously without publishing any progress, 660 * so just signal completion here */ 661 qemu_progress_print(100.f, 0); 662 } 663 664 static int img_commit(int argc, char **argv) 665 { 666 int c, ret, flags; 667 const char *filename, *fmt, *cache, *base; 668 BlockBackend *blk; 669 BlockDriverState *bs, *base_bs; 670 bool progress = false, quiet = false, drop = false; 671 Error *local_err = NULL; 672 CommonBlockJobCBInfo cbi; 673 674 fmt = NULL; 675 cache = BDRV_DEFAULT_CACHE; 676 base = NULL; 677 for(;;) { 678 c = getopt(argc, argv, "f:ht:b:dpq"); 679 if (c == -1) { 680 break; 681 } 682 switch(c) { 683 case '?': 684 case 'h': 685 help(); 686 break; 687 case 'f': 688 fmt = optarg; 689 break; 690 case 't': 691 cache = optarg; 692 break; 693 case 'b': 694 base = optarg; 695 /* -b implies -d */ 696 drop = true; 697 break; 698 case 'd': 699 drop = true; 700 break; 701 case 'p': 702 progress = true; 703 break; 704 case 'q': 705 quiet = true; 706 break; 707 } 708 } 709 710 /* Progress is not shown in Quiet mode */ 711 if (quiet) { 712 progress = false; 713 } 714 715 if (optind != argc - 1) { 716 error_exit("Expecting one image file name"); 717 } 718 filename = argv[optind++]; 719 720 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 721 ret = bdrv_parse_cache_flags(cache, &flags); 722 if (ret < 0) { 723 error_report("Invalid cache option: %s", cache); 724 return 1; 725 } 726 727 blk = img_open("image", filename, fmt, flags, true, quiet); 728 if (!blk) { 729 return 1; 730 } 731 bs = blk_bs(blk); 732 733 qemu_progress_init(progress, 1.f); 734 qemu_progress_print(0.f, 100); 735 736 if (base) { 737 base_bs = bdrv_find_backing_image(bs, base); 738 if (!base_bs) { 739 error_setg(&local_err, QERR_BASE_NOT_FOUND, base); 740 goto done; 741 } 742 } else { 743 /* This is different from QMP, which by default uses the deepest file in 744 * the backing chain (i.e., the very base); however, the traditional 745 * behavior of qemu-img commit is using the immediate backing file. */ 746 base_bs = backing_bs(bs); 747 if (!base_bs) { 748 error_setg(&local_err, "Image does not have a backing file"); 749 goto done; 750 } 751 } 752 753 cbi = (CommonBlockJobCBInfo){ 754 .errp = &local_err, 755 .bs = bs, 756 }; 757 758 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 759 common_block_job_cb, &cbi, &local_err); 760 if (local_err) { 761 goto done; 762 } 763 764 /* When the block job completes, the BlockBackend reference will point to 765 * the old backing file. In order to avoid that the top image is already 766 * deleted, so we can still empty it afterwards, increment the reference 767 * counter here preemptively. */ 768 if (!drop) { 769 bdrv_ref(bs); 770 } 771 772 run_block_job(bs->job, &local_err); 773 if (local_err) { 774 goto unref_backing; 775 } 776 777 if (!drop && bs->drv->bdrv_make_empty) { 778 ret = bs->drv->bdrv_make_empty(bs); 779 if (ret) { 780 error_setg_errno(&local_err, -ret, "Could not empty %s", 781 filename); 782 goto unref_backing; 783 } 784 } 785 786 unref_backing: 787 if (!drop) { 788 bdrv_unref(bs); 789 } 790 791 done: 792 qemu_progress_end(); 793 794 blk_unref(blk); 795 796 if (local_err) { 797 error_report_err(local_err); 798 return 1; 799 } 800 801 qprintf(quiet, "Image committed.\n"); 802 return 0; 803 } 804 805 /* 806 * Returns true iff the first sector pointed to by 'buf' contains at least 807 * a non-NUL byte. 808 * 809 * 'pnum' is set to the number of sectors (including and immediately following 810 * the first one) that are known to be in the same allocated/unallocated state. 811 */ 812 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 813 { 814 bool is_zero; 815 int i; 816 817 if (n <= 0) { 818 *pnum = 0; 819 return 0; 820 } 821 is_zero = buffer_is_zero(buf, 512); 822 for(i = 1; i < n; i++) { 823 buf += 512; 824 if (is_zero != buffer_is_zero(buf, 512)) { 825 break; 826 } 827 } 828 *pnum = i; 829 return !is_zero; 830 } 831 832 /* 833 * Like is_allocated_sectors, but if the buffer starts with a used sector, 834 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 835 * breaking up write requests for only small sparse areas. 836 */ 837 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 838 int min) 839 { 840 int ret; 841 int num_checked, num_used; 842 843 if (n < min) { 844 min = n; 845 } 846 847 ret = is_allocated_sectors(buf, n, pnum); 848 if (!ret) { 849 return ret; 850 } 851 852 num_used = *pnum; 853 buf += BDRV_SECTOR_SIZE * *pnum; 854 n -= *pnum; 855 num_checked = num_used; 856 857 while (n > 0) { 858 ret = is_allocated_sectors(buf, n, pnum); 859 860 buf += BDRV_SECTOR_SIZE * *pnum; 861 n -= *pnum; 862 num_checked += *pnum; 863 if (ret) { 864 num_used = num_checked; 865 } else if (*pnum >= min) { 866 break; 867 } 868 } 869 870 *pnum = num_used; 871 return 1; 872 } 873 874 /* 875 * Compares two buffers sector by sector. Returns 0 if the first sector of both 876 * buffers matches, non-zero otherwise. 877 * 878 * pnum is set to the number of sectors (including and immediately following 879 * the first one) that are known to have the same comparison result 880 */ 881 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 882 int *pnum) 883 { 884 bool res; 885 int i; 886 887 if (n <= 0) { 888 *pnum = 0; 889 return 0; 890 } 891 892 res = !!memcmp(buf1, buf2, 512); 893 for(i = 1; i < n; i++) { 894 buf1 += 512; 895 buf2 += 512; 896 897 if (!!memcmp(buf1, buf2, 512) != res) { 898 break; 899 } 900 } 901 902 *pnum = i; 903 return res; 904 } 905 906 #define IO_BUF_SIZE (2 * 1024 * 1024) 907 908 static int64_t sectors_to_bytes(int64_t sectors) 909 { 910 return sectors << BDRV_SECTOR_BITS; 911 } 912 913 static int64_t sectors_to_process(int64_t total, int64_t from) 914 { 915 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 916 } 917 918 /* 919 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 920 * 921 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 922 * data and negative value on error. 923 * 924 * @param blk: BlockBackend for the image 925 * @param sect_num: Number of first sector to check 926 * @param sect_count: Number of sectors to check 927 * @param filename: Name of disk file we are checking (logging purpose) 928 * @param buffer: Allocated buffer for storing read data 929 * @param quiet: Flag for quiet mode 930 */ 931 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 932 int sect_count, const char *filename, 933 uint8_t *buffer, bool quiet) 934 { 935 int pnum, ret = 0; 936 ret = blk_read(blk, sect_num, buffer, sect_count); 937 if (ret < 0) { 938 error_report("Error while reading offset %" PRId64 " of %s: %s", 939 sectors_to_bytes(sect_num), filename, strerror(-ret)); 940 return ret; 941 } 942 ret = is_allocated_sectors(buffer, sect_count, &pnum); 943 if (ret || pnum != sect_count) { 944 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 945 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 946 return 1; 947 } 948 949 return 0; 950 } 951 952 /* 953 * Compares two images. Exit codes: 954 * 955 * 0 - Images are identical 956 * 1 - Images differ 957 * >1 - Error occurred 958 */ 959 static int img_compare(int argc, char **argv) 960 { 961 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 962 BlockBackend *blk1, *blk2; 963 BlockDriverState *bs1, *bs2; 964 int64_t total_sectors1, total_sectors2; 965 uint8_t *buf1 = NULL, *buf2 = NULL; 966 int pnum1, pnum2; 967 int allocated1, allocated2; 968 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 969 bool progress = false, quiet = false, strict = false; 970 int flags; 971 int64_t total_sectors; 972 int64_t sector_num = 0; 973 int64_t nb_sectors; 974 int c, pnum; 975 uint64_t progress_base; 976 977 cache = BDRV_DEFAULT_CACHE; 978 for (;;) { 979 c = getopt(argc, argv, "hf:F:T:pqs"); 980 if (c == -1) { 981 break; 982 } 983 switch (c) { 984 case '?': 985 case 'h': 986 help(); 987 break; 988 case 'f': 989 fmt1 = optarg; 990 break; 991 case 'F': 992 fmt2 = optarg; 993 break; 994 case 'T': 995 cache = optarg; 996 break; 997 case 'p': 998 progress = true; 999 break; 1000 case 'q': 1001 quiet = true; 1002 break; 1003 case 's': 1004 strict = true; 1005 break; 1006 } 1007 } 1008 1009 /* Progress is not shown in Quiet mode */ 1010 if (quiet) { 1011 progress = false; 1012 } 1013 1014 1015 if (optind != argc - 2) { 1016 error_exit("Expecting two image file names"); 1017 } 1018 filename1 = argv[optind++]; 1019 filename2 = argv[optind++]; 1020 1021 /* Initialize before goto out */ 1022 qemu_progress_init(progress, 2.0); 1023 1024 flags = BDRV_O_FLAGS; 1025 ret = bdrv_parse_cache_flags(cache, &flags); 1026 if (ret < 0) { 1027 error_report("Invalid source cache option: %s", cache); 1028 ret = 2; 1029 goto out3; 1030 } 1031 1032 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); 1033 if (!blk1) { 1034 ret = 2; 1035 goto out3; 1036 } 1037 bs1 = blk_bs(blk1); 1038 1039 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1040 if (!blk2) { 1041 ret = 2; 1042 goto out2; 1043 } 1044 bs2 = blk_bs(blk2); 1045 1046 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1047 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1048 total_sectors1 = blk_nb_sectors(blk1); 1049 if (total_sectors1 < 0) { 1050 error_report("Can't get size of %s: %s", 1051 filename1, strerror(-total_sectors1)); 1052 ret = 4; 1053 goto out; 1054 } 1055 total_sectors2 = blk_nb_sectors(blk2); 1056 if (total_sectors2 < 0) { 1057 error_report("Can't get size of %s: %s", 1058 filename2, strerror(-total_sectors2)); 1059 ret = 4; 1060 goto out; 1061 } 1062 total_sectors = MIN(total_sectors1, total_sectors2); 1063 progress_base = MAX(total_sectors1, total_sectors2); 1064 1065 qemu_progress_print(0, 100); 1066 1067 if (strict && total_sectors1 != total_sectors2) { 1068 ret = 1; 1069 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1070 goto out; 1071 } 1072 1073 for (;;) { 1074 nb_sectors = sectors_to_process(total_sectors, sector_num); 1075 if (nb_sectors <= 0) { 1076 break; 1077 } 1078 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, 1079 &pnum1); 1080 if (allocated1 < 0) { 1081 ret = 3; 1082 error_report("Sector allocation test failed for %s", filename1); 1083 goto out; 1084 } 1085 1086 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, 1087 &pnum2); 1088 if (allocated2 < 0) { 1089 ret = 3; 1090 error_report("Sector allocation test failed for %s", filename2); 1091 goto out; 1092 } 1093 nb_sectors = MIN(pnum1, pnum2); 1094 1095 if (allocated1 == allocated2) { 1096 if (allocated1) { 1097 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1098 if (ret < 0) { 1099 error_report("Error while reading offset %" PRId64 " of %s:" 1100 " %s", sectors_to_bytes(sector_num), filename1, 1101 strerror(-ret)); 1102 ret = 4; 1103 goto out; 1104 } 1105 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1106 if (ret < 0) { 1107 error_report("Error while reading offset %" PRId64 1108 " of %s: %s", sectors_to_bytes(sector_num), 1109 filename2, strerror(-ret)); 1110 ret = 4; 1111 goto out; 1112 } 1113 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1114 if (ret || pnum != nb_sectors) { 1115 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1116 sectors_to_bytes( 1117 ret ? sector_num : sector_num + pnum)); 1118 ret = 1; 1119 goto out; 1120 } 1121 } 1122 } else { 1123 if (strict) { 1124 ret = 1; 1125 qprintf(quiet, "Strict mode: Offset %" PRId64 1126 " allocation mismatch!\n", 1127 sectors_to_bytes(sector_num)); 1128 goto out; 1129 } 1130 1131 if (allocated1) { 1132 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1133 filename1, buf1, quiet); 1134 } else { 1135 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1136 filename2, buf1, quiet); 1137 } 1138 if (ret) { 1139 if (ret < 0) { 1140 error_report("Error while reading offset %" PRId64 ": %s", 1141 sectors_to_bytes(sector_num), strerror(-ret)); 1142 ret = 4; 1143 } 1144 goto out; 1145 } 1146 } 1147 sector_num += nb_sectors; 1148 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1149 } 1150 1151 if (total_sectors1 != total_sectors2) { 1152 BlockBackend *blk_over; 1153 int64_t total_sectors_over; 1154 const char *filename_over; 1155 1156 qprintf(quiet, "Warning: Image size mismatch!\n"); 1157 if (total_sectors1 > total_sectors2) { 1158 total_sectors_over = total_sectors1; 1159 blk_over = blk1; 1160 filename_over = filename1; 1161 } else { 1162 total_sectors_over = total_sectors2; 1163 blk_over = blk2; 1164 filename_over = filename2; 1165 } 1166 1167 for (;;) { 1168 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1169 if (nb_sectors <= 0) { 1170 break; 1171 } 1172 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1173 nb_sectors, &pnum); 1174 if (ret < 0) { 1175 ret = 3; 1176 error_report("Sector allocation test failed for %s", 1177 filename_over); 1178 goto out; 1179 1180 } 1181 nb_sectors = pnum; 1182 if (ret) { 1183 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1184 filename_over, buf1, quiet); 1185 if (ret) { 1186 if (ret < 0) { 1187 error_report("Error while reading offset %" PRId64 1188 " of %s: %s", sectors_to_bytes(sector_num), 1189 filename_over, strerror(-ret)); 1190 ret = 4; 1191 } 1192 goto out; 1193 } 1194 } 1195 sector_num += nb_sectors; 1196 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1197 } 1198 } 1199 1200 qprintf(quiet, "Images are identical.\n"); 1201 ret = 0; 1202 1203 out: 1204 qemu_vfree(buf1); 1205 qemu_vfree(buf2); 1206 blk_unref(blk2); 1207 out2: 1208 blk_unref(blk1); 1209 out3: 1210 qemu_progress_end(); 1211 return ret; 1212 } 1213 1214 enum ImgConvertBlockStatus { 1215 BLK_DATA, 1216 BLK_ZERO, 1217 BLK_BACKING_FILE, 1218 }; 1219 1220 typedef struct ImgConvertState { 1221 BlockBackend **src; 1222 int64_t *src_sectors; 1223 int src_cur, src_num; 1224 int64_t src_cur_offset; 1225 int64_t total_sectors; 1226 int64_t allocated_sectors; 1227 enum ImgConvertBlockStatus status; 1228 int64_t sector_next_status; 1229 BlockBackend *target; 1230 bool has_zero_init; 1231 bool compressed; 1232 bool target_has_backing; 1233 int min_sparse; 1234 size_t cluster_sectors; 1235 size_t buf_sectors; 1236 } ImgConvertState; 1237 1238 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1239 { 1240 assert(sector_num >= s->src_cur_offset); 1241 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1242 s->src_cur_offset += s->src_sectors[s->src_cur]; 1243 s->src_cur++; 1244 assert(s->src_cur < s->src_num); 1245 } 1246 } 1247 1248 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1249 { 1250 int64_t ret; 1251 int n; 1252 1253 convert_select_part(s, sector_num); 1254 1255 assert(s->total_sectors > sector_num); 1256 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1257 1258 if (s->sector_next_status <= sector_num) { 1259 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1260 sector_num - s->src_cur_offset, 1261 n, &n); 1262 if (ret < 0) { 1263 return ret; 1264 } 1265 1266 if (ret & BDRV_BLOCK_ZERO) { 1267 s->status = BLK_ZERO; 1268 } else if (ret & BDRV_BLOCK_DATA) { 1269 s->status = BLK_DATA; 1270 } else if (!s->target_has_backing) { 1271 /* Without a target backing file we must copy over the contents of 1272 * the backing file as well. */ 1273 /* TODO Check block status of the backing file chain to avoid 1274 * needlessly reading zeroes and limiting the iteration to the 1275 * buffer size */ 1276 s->status = BLK_DATA; 1277 } else { 1278 s->status = BLK_BACKING_FILE; 1279 } 1280 1281 s->sector_next_status = sector_num + n; 1282 } 1283 1284 n = MIN(n, s->sector_next_status - sector_num); 1285 if (s->status == BLK_DATA) { 1286 n = MIN(n, s->buf_sectors); 1287 } 1288 1289 /* We need to write complete clusters for compressed images, so if an 1290 * unallocated area is shorter than that, we must consider the whole 1291 * cluster allocated. */ 1292 if (s->compressed) { 1293 if (n < s->cluster_sectors) { 1294 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1295 s->status = BLK_DATA; 1296 } else { 1297 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1298 } 1299 } 1300 1301 return n; 1302 } 1303 1304 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1305 uint8_t *buf) 1306 { 1307 int n; 1308 int ret; 1309 1310 if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { 1311 return 0; 1312 } 1313 1314 assert(nb_sectors <= s->buf_sectors); 1315 while (nb_sectors > 0) { 1316 BlockBackend *blk; 1317 int64_t bs_sectors; 1318 1319 /* In the case of compression with multiple source files, we can get a 1320 * nb_sectors that spreads into the next part. So we must be able to 1321 * read across multiple BDSes for one convert_read() call. */ 1322 convert_select_part(s, sector_num); 1323 blk = s->src[s->src_cur]; 1324 bs_sectors = s->src_sectors[s->src_cur]; 1325 1326 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1327 ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); 1328 if (ret < 0) { 1329 return ret; 1330 } 1331 1332 sector_num += n; 1333 nb_sectors -= n; 1334 buf += n * BDRV_SECTOR_SIZE; 1335 } 1336 1337 return 0; 1338 } 1339 1340 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1341 const uint8_t *buf) 1342 { 1343 int ret; 1344 1345 while (nb_sectors > 0) { 1346 int n = nb_sectors; 1347 1348 switch (s->status) { 1349 case BLK_BACKING_FILE: 1350 /* If we have a backing file, leave clusters unallocated that are 1351 * unallocated in the source image, so that the backing file is 1352 * visible at the respective offset. */ 1353 assert(s->target_has_backing); 1354 break; 1355 1356 case BLK_DATA: 1357 /* We must always write compressed clusters as a whole, so don't 1358 * try to find zeroed parts in the buffer. We can only save the 1359 * write if the buffer is completely zeroed and we're allowed to 1360 * keep the target sparse. */ 1361 if (s->compressed) { 1362 if (s->has_zero_init && s->min_sparse && 1363 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1364 { 1365 assert(!s->target_has_backing); 1366 break; 1367 } 1368 1369 ret = blk_write_compressed(s->target, sector_num, buf, n); 1370 if (ret < 0) { 1371 return ret; 1372 } 1373 break; 1374 } 1375 1376 /* If there is real non-zero data or we're told to keep the target 1377 * fully allocated (-S 0), we must write it. Otherwise we can treat 1378 * it as zero sectors. */ 1379 if (!s->min_sparse || 1380 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1381 { 1382 ret = blk_write(s->target, sector_num, buf, n); 1383 if (ret < 0) { 1384 return ret; 1385 } 1386 break; 1387 } 1388 /* fall-through */ 1389 1390 case BLK_ZERO: 1391 if (s->has_zero_init) { 1392 break; 1393 } 1394 ret = blk_write_zeroes(s->target, sector_num, n, 0); 1395 if (ret < 0) { 1396 return ret; 1397 } 1398 break; 1399 } 1400 1401 sector_num += n; 1402 nb_sectors -= n; 1403 buf += n * BDRV_SECTOR_SIZE; 1404 } 1405 1406 return 0; 1407 } 1408 1409 static int convert_do_copy(ImgConvertState *s) 1410 { 1411 uint8_t *buf = NULL; 1412 int64_t sector_num, allocated_done; 1413 int ret; 1414 int n; 1415 1416 /* Check whether we have zero initialisation or can get it efficiently */ 1417 s->has_zero_init = s->min_sparse && !s->target_has_backing 1418 ? bdrv_has_zero_init(blk_bs(s->target)) 1419 : false; 1420 1421 if (!s->has_zero_init && !s->target_has_backing && 1422 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1423 { 1424 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1425 if (ret == 0) { 1426 s->has_zero_init = true; 1427 } 1428 } 1429 1430 /* Allocate buffer for copied data. For compressed images, only one cluster 1431 * can be copied at a time. */ 1432 if (s->compressed) { 1433 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1434 error_report("invalid cluster size"); 1435 ret = -EINVAL; 1436 goto fail; 1437 } 1438 s->buf_sectors = s->cluster_sectors; 1439 } 1440 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1441 1442 /* Calculate allocated sectors for progress */ 1443 s->allocated_sectors = 0; 1444 sector_num = 0; 1445 while (sector_num < s->total_sectors) { 1446 n = convert_iteration_sectors(s, sector_num); 1447 if (n < 0) { 1448 ret = n; 1449 goto fail; 1450 } 1451 if (s->status == BLK_DATA) { 1452 s->allocated_sectors += n; 1453 } 1454 sector_num += n; 1455 } 1456 1457 /* Do the copy */ 1458 s->src_cur = 0; 1459 s->src_cur_offset = 0; 1460 s->sector_next_status = 0; 1461 1462 sector_num = 0; 1463 allocated_done = 0; 1464 1465 while (sector_num < s->total_sectors) { 1466 n = convert_iteration_sectors(s, sector_num); 1467 if (n < 0) { 1468 ret = n; 1469 goto fail; 1470 } 1471 if (s->status == BLK_DATA) { 1472 allocated_done += n; 1473 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1474 0); 1475 } 1476 1477 ret = convert_read(s, sector_num, n, buf); 1478 if (ret < 0) { 1479 error_report("error while reading sector %" PRId64 1480 ": %s", sector_num, strerror(-ret)); 1481 goto fail; 1482 } 1483 1484 ret = convert_write(s, sector_num, n, buf); 1485 if (ret < 0) { 1486 error_report("error while writing sector %" PRId64 1487 ": %s", sector_num, strerror(-ret)); 1488 goto fail; 1489 } 1490 1491 sector_num += n; 1492 } 1493 1494 if (s->compressed) { 1495 /* signal EOF to align */ 1496 ret = blk_write_compressed(s->target, 0, NULL, 0); 1497 if (ret < 0) { 1498 goto fail; 1499 } 1500 } 1501 1502 ret = 0; 1503 fail: 1504 qemu_vfree(buf); 1505 return ret; 1506 } 1507 1508 static int img_convert(int argc, char **argv) 1509 { 1510 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1511 int64_t ret = 0; 1512 int progress = 0, flags, src_flags; 1513 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1514 BlockDriver *drv, *proto_drv; 1515 BlockBackend **blk = NULL, *out_blk = NULL; 1516 BlockDriverState **bs = NULL, *out_bs = NULL; 1517 int64_t total_sectors; 1518 int64_t *bs_sectors = NULL; 1519 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1520 BlockDriverInfo bdi; 1521 QemuOpts *opts = NULL; 1522 QemuOptsList *create_opts = NULL; 1523 const char *out_baseimg_param; 1524 char *options = NULL; 1525 const char *snapshot_name = NULL; 1526 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1527 bool quiet = false; 1528 Error *local_err = NULL; 1529 QemuOpts *sn_opts = NULL; 1530 ImgConvertState state; 1531 1532 fmt = NULL; 1533 out_fmt = "raw"; 1534 cache = "unsafe"; 1535 src_cache = BDRV_DEFAULT_CACHE; 1536 out_baseimg = NULL; 1537 compress = 0; 1538 skip_create = 0; 1539 for(;;) { 1540 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1541 if (c == -1) { 1542 break; 1543 } 1544 switch(c) { 1545 case '?': 1546 case 'h': 1547 help(); 1548 break; 1549 case 'f': 1550 fmt = optarg; 1551 break; 1552 case 'O': 1553 out_fmt = optarg; 1554 break; 1555 case 'B': 1556 out_baseimg = optarg; 1557 break; 1558 case 'c': 1559 compress = 1; 1560 break; 1561 case 'e': 1562 error_report("option -e is deprecated, please use \'-o " 1563 "encryption\' instead!"); 1564 ret = -1; 1565 goto fail_getopt; 1566 case '6': 1567 error_report("option -6 is deprecated, please use \'-o " 1568 "compat6\' instead!"); 1569 ret = -1; 1570 goto fail_getopt; 1571 case 'o': 1572 if (!is_valid_option_list(optarg)) { 1573 error_report("Invalid option list: %s", optarg); 1574 ret = -1; 1575 goto fail_getopt; 1576 } 1577 if (!options) { 1578 options = g_strdup(optarg); 1579 } else { 1580 char *old_options = options; 1581 options = g_strdup_printf("%s,%s", options, optarg); 1582 g_free(old_options); 1583 } 1584 break; 1585 case 's': 1586 snapshot_name = optarg; 1587 break; 1588 case 'l': 1589 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1590 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1591 optarg, false); 1592 if (!sn_opts) { 1593 error_report("Failed in parsing snapshot param '%s'", 1594 optarg); 1595 ret = -1; 1596 goto fail_getopt; 1597 } 1598 } else { 1599 snapshot_name = optarg; 1600 } 1601 break; 1602 case 'S': 1603 { 1604 int64_t sval; 1605 char *end; 1606 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 1607 if (sval < 0 || *end) { 1608 error_report("Invalid minimum zero buffer size for sparse output specified"); 1609 ret = -1; 1610 goto fail_getopt; 1611 } 1612 1613 min_sparse = sval / BDRV_SECTOR_SIZE; 1614 break; 1615 } 1616 case 'p': 1617 progress = 1; 1618 break; 1619 case 't': 1620 cache = optarg; 1621 break; 1622 case 'T': 1623 src_cache = optarg; 1624 break; 1625 case 'q': 1626 quiet = true; 1627 break; 1628 case 'n': 1629 skip_create = 1; 1630 break; 1631 } 1632 } 1633 1634 /* Initialize before goto out */ 1635 if (quiet) { 1636 progress = 0; 1637 } 1638 qemu_progress_init(progress, 1.0); 1639 1640 1641 bs_n = argc - optind - 1; 1642 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1643 1644 if (options && has_help_option(options)) { 1645 ret = print_block_option_help(out_filename, out_fmt); 1646 goto out; 1647 } 1648 1649 if (bs_n < 1) { 1650 error_exit("Must specify image file name"); 1651 } 1652 1653 1654 if (bs_n > 1 && out_baseimg) { 1655 error_report("-B makes no sense when concatenating multiple input " 1656 "images"); 1657 ret = -1; 1658 goto out; 1659 } 1660 1661 src_flags = BDRV_O_FLAGS; 1662 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1663 if (ret < 0) { 1664 error_report("Invalid source cache option: %s", src_cache); 1665 goto out; 1666 } 1667 1668 qemu_progress_print(0, 100); 1669 1670 blk = g_new0(BlockBackend *, bs_n); 1671 bs = g_new0(BlockDriverState *, bs_n); 1672 bs_sectors = g_new(int64_t, bs_n); 1673 1674 total_sectors = 0; 1675 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1676 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1677 : g_strdup("source"); 1678 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1679 true, quiet); 1680 g_free(id); 1681 if (!blk[bs_i]) { 1682 ret = -1; 1683 goto out; 1684 } 1685 bs[bs_i] = blk_bs(blk[bs_i]); 1686 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1687 if (bs_sectors[bs_i] < 0) { 1688 error_report("Could not get size of %s: %s", 1689 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1690 ret = -1; 1691 goto out; 1692 } 1693 total_sectors += bs_sectors[bs_i]; 1694 } 1695 1696 if (sn_opts) { 1697 ret = bdrv_snapshot_load_tmp(bs[0], 1698 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1699 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1700 &local_err); 1701 } else if (snapshot_name != NULL) { 1702 if (bs_n > 1) { 1703 error_report("No support for concatenating multiple snapshot"); 1704 ret = -1; 1705 goto out; 1706 } 1707 1708 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1709 } 1710 if (local_err) { 1711 error_reportf_err(local_err, "Failed to load snapshot: "); 1712 ret = -1; 1713 goto out; 1714 } 1715 1716 /* Find driver and parse its options */ 1717 drv = bdrv_find_format(out_fmt); 1718 if (!drv) { 1719 error_report("Unknown file format '%s'", out_fmt); 1720 ret = -1; 1721 goto out; 1722 } 1723 1724 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1725 if (!proto_drv) { 1726 error_report_err(local_err); 1727 ret = -1; 1728 goto out; 1729 } 1730 1731 if (!skip_create) { 1732 if (!drv->create_opts) { 1733 error_report("Format driver '%s' does not support image creation", 1734 drv->format_name); 1735 ret = -1; 1736 goto out; 1737 } 1738 1739 if (!proto_drv->create_opts) { 1740 error_report("Protocol driver '%s' does not support image creation", 1741 proto_drv->format_name); 1742 ret = -1; 1743 goto out; 1744 } 1745 1746 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1747 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1748 1749 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1750 if (options) { 1751 qemu_opts_do_parse(opts, options, NULL, &local_err); 1752 if (local_err) { 1753 error_report_err(local_err); 1754 ret = -1; 1755 goto out; 1756 } 1757 } 1758 1759 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1760 &error_abort); 1761 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1762 if (ret < 0) { 1763 goto out; 1764 } 1765 } 1766 1767 /* Get backing file name if -o backing_file was used */ 1768 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1769 if (out_baseimg_param) { 1770 out_baseimg = out_baseimg_param; 1771 } 1772 1773 /* Check if compression is supported */ 1774 if (compress) { 1775 bool encryption = 1776 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1777 const char *preallocation = 1778 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1779 1780 if (!drv->bdrv_write_compressed) { 1781 error_report("Compression not supported for this file format"); 1782 ret = -1; 1783 goto out; 1784 } 1785 1786 if (encryption) { 1787 error_report("Compression and encryption not supported at " 1788 "the same time"); 1789 ret = -1; 1790 goto out; 1791 } 1792 1793 if (preallocation 1794 && strcmp(preallocation, "off")) 1795 { 1796 error_report("Compression and preallocation not supported at " 1797 "the same time"); 1798 ret = -1; 1799 goto out; 1800 } 1801 } 1802 1803 if (!skip_create) { 1804 /* Create the new image */ 1805 ret = bdrv_create(drv, out_filename, opts, &local_err); 1806 if (ret < 0) { 1807 error_reportf_err(local_err, "%s: error while converting %s: ", 1808 out_filename, out_fmt); 1809 goto out; 1810 } 1811 } 1812 1813 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1814 ret = bdrv_parse_cache_flags(cache, &flags); 1815 if (ret < 0) { 1816 error_report("Invalid cache option: %s", cache); 1817 goto out; 1818 } 1819 1820 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1821 if (!out_blk) { 1822 ret = -1; 1823 goto out; 1824 } 1825 out_bs = blk_bs(out_blk); 1826 1827 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1828 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1829 * as maximum. */ 1830 bufsectors = MIN(32768, 1831 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1832 out_bs->bl.discard_alignment)) 1833 ); 1834 1835 if (skip_create) { 1836 int64_t output_sectors = blk_nb_sectors(out_blk); 1837 if (output_sectors < 0) { 1838 error_report("unable to get output image length: %s", 1839 strerror(-output_sectors)); 1840 ret = -1; 1841 goto out; 1842 } else if (output_sectors < total_sectors) { 1843 error_report("output file is smaller than input file"); 1844 ret = -1; 1845 goto out; 1846 } 1847 } 1848 1849 cluster_sectors = 0; 1850 ret = bdrv_get_info(out_bs, &bdi); 1851 if (ret < 0) { 1852 if (compress) { 1853 error_report("could not get block driver info"); 1854 goto out; 1855 } 1856 } else { 1857 compress = compress || bdi.needs_compressed_writes; 1858 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1859 } 1860 1861 state = (ImgConvertState) { 1862 .src = blk, 1863 .src_sectors = bs_sectors, 1864 .src_num = bs_n, 1865 .total_sectors = total_sectors, 1866 .target = out_blk, 1867 .compressed = compress, 1868 .target_has_backing = (bool) out_baseimg, 1869 .min_sparse = min_sparse, 1870 .cluster_sectors = cluster_sectors, 1871 .buf_sectors = bufsectors, 1872 }; 1873 ret = convert_do_copy(&state); 1874 1875 out: 1876 if (!ret) { 1877 qemu_progress_print(100, 0); 1878 } 1879 qemu_progress_end(); 1880 qemu_opts_del(opts); 1881 qemu_opts_free(create_opts); 1882 qemu_opts_del(sn_opts); 1883 blk_unref(out_blk); 1884 g_free(bs); 1885 if (blk) { 1886 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1887 blk_unref(blk[bs_i]); 1888 } 1889 g_free(blk); 1890 } 1891 g_free(bs_sectors); 1892 fail_getopt: 1893 g_free(options); 1894 1895 if (ret) { 1896 return 1; 1897 } 1898 return 0; 1899 } 1900 1901 1902 static void dump_snapshots(BlockDriverState *bs) 1903 { 1904 QEMUSnapshotInfo *sn_tab, *sn; 1905 int nb_sns, i; 1906 1907 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1908 if (nb_sns <= 0) 1909 return; 1910 printf("Snapshot list:\n"); 1911 bdrv_snapshot_dump(fprintf, stdout, NULL); 1912 printf("\n"); 1913 for(i = 0; i < nb_sns; i++) { 1914 sn = &sn_tab[i]; 1915 bdrv_snapshot_dump(fprintf, stdout, sn); 1916 printf("\n"); 1917 } 1918 g_free(sn_tab); 1919 } 1920 1921 static void dump_json_image_info_list(ImageInfoList *list) 1922 { 1923 Error *local_err = NULL; 1924 QString *str; 1925 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1926 QObject *obj; 1927 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1928 &list, NULL, &local_err); 1929 obj = qmp_output_get_qobject(ov); 1930 str = qobject_to_json_pretty(obj); 1931 assert(str != NULL); 1932 printf("%s\n", qstring_get_str(str)); 1933 qobject_decref(obj); 1934 qmp_output_visitor_cleanup(ov); 1935 QDECREF(str); 1936 } 1937 1938 static void dump_json_image_info(ImageInfo *info) 1939 { 1940 Error *local_err = NULL; 1941 QString *str; 1942 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1943 QObject *obj; 1944 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1945 &info, NULL, &local_err); 1946 obj = qmp_output_get_qobject(ov); 1947 str = qobject_to_json_pretty(obj); 1948 assert(str != NULL); 1949 printf("%s\n", qstring_get_str(str)); 1950 qobject_decref(obj); 1951 qmp_output_visitor_cleanup(ov); 1952 QDECREF(str); 1953 } 1954 1955 static void dump_human_image_info_list(ImageInfoList *list) 1956 { 1957 ImageInfoList *elem; 1958 bool delim = false; 1959 1960 for (elem = list; elem; elem = elem->next) { 1961 if (delim) { 1962 printf("\n"); 1963 } 1964 delim = true; 1965 1966 bdrv_image_info_dump(fprintf, stdout, elem->value); 1967 } 1968 } 1969 1970 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1971 { 1972 return strcmp(a, b) == 0; 1973 } 1974 1975 /** 1976 * Open an image file chain and return an ImageInfoList 1977 * 1978 * @filename: topmost image filename 1979 * @fmt: topmost image format (may be NULL to autodetect) 1980 * @chain: true - enumerate entire backing file chain 1981 * false - only topmost image file 1982 * 1983 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1984 * image file. If there was an error a message will have been printed to 1985 * stderr. 1986 */ 1987 static ImageInfoList *collect_image_info_list(const char *filename, 1988 const char *fmt, 1989 bool chain) 1990 { 1991 ImageInfoList *head = NULL; 1992 ImageInfoList **last = &head; 1993 GHashTable *filenames; 1994 Error *err = NULL; 1995 1996 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 1997 1998 while (filename) { 1999 BlockBackend *blk; 2000 BlockDriverState *bs; 2001 ImageInfo *info; 2002 ImageInfoList *elem; 2003 2004 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2005 error_report("Backing file '%s' creates an infinite loop.", 2006 filename); 2007 goto err; 2008 } 2009 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2010 2011 blk = img_open("image", filename, fmt, 2012 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2013 if (!blk) { 2014 goto err; 2015 } 2016 bs = blk_bs(blk); 2017 2018 bdrv_query_image_info(bs, &info, &err); 2019 if (err) { 2020 error_report_err(err); 2021 blk_unref(blk); 2022 goto err; 2023 } 2024 2025 elem = g_new0(ImageInfoList, 1); 2026 elem->value = info; 2027 *last = elem; 2028 last = &elem->next; 2029 2030 blk_unref(blk); 2031 2032 filename = fmt = NULL; 2033 if (chain) { 2034 if (info->has_full_backing_filename) { 2035 filename = info->full_backing_filename; 2036 } else if (info->has_backing_filename) { 2037 error_report("Could not determine absolute backing filename," 2038 " but backing filename '%s' present", 2039 info->backing_filename); 2040 goto err; 2041 } 2042 if (info->has_backing_filename_format) { 2043 fmt = info->backing_filename_format; 2044 } 2045 } 2046 } 2047 g_hash_table_destroy(filenames); 2048 return head; 2049 2050 err: 2051 qapi_free_ImageInfoList(head); 2052 g_hash_table_destroy(filenames); 2053 return NULL; 2054 } 2055 2056 static int img_info(int argc, char **argv) 2057 { 2058 int c; 2059 OutputFormat output_format = OFORMAT_HUMAN; 2060 bool chain = false; 2061 const char *filename, *fmt, *output; 2062 ImageInfoList *list; 2063 2064 fmt = NULL; 2065 output = NULL; 2066 for(;;) { 2067 int option_index = 0; 2068 static const struct option long_options[] = { 2069 {"help", no_argument, 0, 'h'}, 2070 {"format", required_argument, 0, 'f'}, 2071 {"output", required_argument, 0, OPTION_OUTPUT}, 2072 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2073 {0, 0, 0, 0} 2074 }; 2075 c = getopt_long(argc, argv, "f:h", 2076 long_options, &option_index); 2077 if (c == -1) { 2078 break; 2079 } 2080 switch(c) { 2081 case '?': 2082 case 'h': 2083 help(); 2084 break; 2085 case 'f': 2086 fmt = optarg; 2087 break; 2088 case OPTION_OUTPUT: 2089 output = optarg; 2090 break; 2091 case OPTION_BACKING_CHAIN: 2092 chain = true; 2093 break; 2094 } 2095 } 2096 if (optind != argc - 1) { 2097 error_exit("Expecting one image file name"); 2098 } 2099 filename = argv[optind++]; 2100 2101 if (output && !strcmp(output, "json")) { 2102 output_format = OFORMAT_JSON; 2103 } else if (output && !strcmp(output, "human")) { 2104 output_format = OFORMAT_HUMAN; 2105 } else if (output) { 2106 error_report("--output must be used with human or json as argument."); 2107 return 1; 2108 } 2109 2110 list = collect_image_info_list(filename, fmt, chain); 2111 if (!list) { 2112 return 1; 2113 } 2114 2115 switch (output_format) { 2116 case OFORMAT_HUMAN: 2117 dump_human_image_info_list(list); 2118 break; 2119 case OFORMAT_JSON: 2120 if (chain) { 2121 dump_json_image_info_list(list); 2122 } else { 2123 dump_json_image_info(list->value); 2124 } 2125 break; 2126 } 2127 2128 qapi_free_ImageInfoList(list); 2129 return 0; 2130 } 2131 2132 2133 typedef struct MapEntry { 2134 int flags; 2135 int depth; 2136 int64_t start; 2137 int64_t length; 2138 int64_t offset; 2139 BlockDriverState *bs; 2140 } MapEntry; 2141 2142 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2143 MapEntry *next) 2144 { 2145 switch (output_format) { 2146 case OFORMAT_HUMAN: 2147 if ((e->flags & BDRV_BLOCK_DATA) && 2148 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2149 error_report("File contains external, encrypted or compressed clusters."); 2150 exit(1); 2151 } 2152 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2153 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2154 e->start, e->length, e->offset, e->bs->filename); 2155 } 2156 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2157 * Modify the flags here to allow more coalescing. 2158 */ 2159 if (next && 2160 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2161 next->flags &= ~BDRV_BLOCK_DATA; 2162 next->flags |= BDRV_BLOCK_ZERO; 2163 } 2164 break; 2165 case OFORMAT_JSON: 2166 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2167 " \"zero\": %s, \"data\": %s", 2168 (e->start == 0 ? "[" : ",\n"), 2169 e->start, e->length, e->depth, 2170 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2171 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2172 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2173 printf(", \"offset\": %"PRId64"", e->offset); 2174 } 2175 putchar('}'); 2176 2177 if (!next) { 2178 printf("]\n"); 2179 } 2180 break; 2181 } 2182 } 2183 2184 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2185 int nb_sectors, MapEntry *e) 2186 { 2187 int64_t ret; 2188 int depth; 2189 2190 /* As an optimization, we could cache the current range of unallocated 2191 * clusters in each file of the chain, and avoid querying the same 2192 * range repeatedly. 2193 */ 2194 2195 depth = 0; 2196 for (;;) { 2197 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2198 if (ret < 0) { 2199 return ret; 2200 } 2201 assert(nb_sectors); 2202 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2203 break; 2204 } 2205 bs = backing_bs(bs); 2206 if (bs == NULL) { 2207 ret = 0; 2208 break; 2209 } 2210 2211 depth++; 2212 } 2213 2214 e->start = sector_num * BDRV_SECTOR_SIZE; 2215 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2216 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2217 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2218 e->depth = depth; 2219 e->bs = bs; 2220 return 0; 2221 } 2222 2223 static int img_map(int argc, char **argv) 2224 { 2225 int c; 2226 OutputFormat output_format = OFORMAT_HUMAN; 2227 BlockBackend *blk; 2228 BlockDriverState *bs; 2229 const char *filename, *fmt, *output; 2230 int64_t length; 2231 MapEntry curr = { .length = 0 }, next; 2232 int ret = 0; 2233 2234 fmt = NULL; 2235 output = NULL; 2236 for (;;) { 2237 int option_index = 0; 2238 static const struct option long_options[] = { 2239 {"help", no_argument, 0, 'h'}, 2240 {"format", required_argument, 0, 'f'}, 2241 {"output", required_argument, 0, OPTION_OUTPUT}, 2242 {0, 0, 0, 0} 2243 }; 2244 c = getopt_long(argc, argv, "f:h", 2245 long_options, &option_index); 2246 if (c == -1) { 2247 break; 2248 } 2249 switch (c) { 2250 case '?': 2251 case 'h': 2252 help(); 2253 break; 2254 case 'f': 2255 fmt = optarg; 2256 break; 2257 case OPTION_OUTPUT: 2258 output = optarg; 2259 break; 2260 } 2261 } 2262 if (optind != argc - 1) { 2263 error_exit("Expecting one image file name"); 2264 } 2265 filename = argv[optind]; 2266 2267 if (output && !strcmp(output, "json")) { 2268 output_format = OFORMAT_JSON; 2269 } else if (output && !strcmp(output, "human")) { 2270 output_format = OFORMAT_HUMAN; 2271 } else if (output) { 2272 error_report("--output must be used with human or json as argument."); 2273 return 1; 2274 } 2275 2276 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2277 if (!blk) { 2278 return 1; 2279 } 2280 bs = blk_bs(blk); 2281 2282 if (output_format == OFORMAT_HUMAN) { 2283 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2284 } 2285 2286 length = blk_getlength(blk); 2287 while (curr.start + curr.length < length) { 2288 int64_t nsectors_left; 2289 int64_t sector_num; 2290 int n; 2291 2292 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2293 2294 /* Probe up to 1 GiB at a time. */ 2295 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2296 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2297 ret = get_block_status(bs, sector_num, n, &next); 2298 2299 if (ret < 0) { 2300 error_report("Could not read file metadata: %s", strerror(-ret)); 2301 goto out; 2302 } 2303 2304 if (curr.length != 0 && curr.flags == next.flags && 2305 curr.depth == next.depth && 2306 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2307 curr.offset + curr.length == next.offset)) { 2308 curr.length += next.length; 2309 continue; 2310 } 2311 2312 if (curr.length > 0) { 2313 dump_map_entry(output_format, &curr, &next); 2314 } 2315 curr = next; 2316 } 2317 2318 dump_map_entry(output_format, &curr, NULL); 2319 2320 out: 2321 blk_unref(blk); 2322 return ret < 0; 2323 } 2324 2325 #define SNAPSHOT_LIST 1 2326 #define SNAPSHOT_CREATE 2 2327 #define SNAPSHOT_APPLY 3 2328 #define SNAPSHOT_DELETE 4 2329 2330 static int img_snapshot(int argc, char **argv) 2331 { 2332 BlockBackend *blk; 2333 BlockDriverState *bs; 2334 QEMUSnapshotInfo sn; 2335 char *filename, *snapshot_name = NULL; 2336 int c, ret = 0, bdrv_oflags; 2337 int action = 0; 2338 qemu_timeval tv; 2339 bool quiet = false; 2340 Error *err = NULL; 2341 2342 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2343 /* Parse commandline parameters */ 2344 for(;;) { 2345 c = getopt(argc, argv, "la:c:d:hq"); 2346 if (c == -1) { 2347 break; 2348 } 2349 switch(c) { 2350 case '?': 2351 case 'h': 2352 help(); 2353 return 0; 2354 case 'l': 2355 if (action) { 2356 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2357 return 0; 2358 } 2359 action = SNAPSHOT_LIST; 2360 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2361 break; 2362 case 'a': 2363 if (action) { 2364 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2365 return 0; 2366 } 2367 action = SNAPSHOT_APPLY; 2368 snapshot_name = optarg; 2369 break; 2370 case 'c': 2371 if (action) { 2372 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2373 return 0; 2374 } 2375 action = SNAPSHOT_CREATE; 2376 snapshot_name = optarg; 2377 break; 2378 case 'd': 2379 if (action) { 2380 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2381 return 0; 2382 } 2383 action = SNAPSHOT_DELETE; 2384 snapshot_name = optarg; 2385 break; 2386 case 'q': 2387 quiet = true; 2388 break; 2389 } 2390 } 2391 2392 if (optind != argc - 1) { 2393 error_exit("Expecting one image file name"); 2394 } 2395 filename = argv[optind++]; 2396 2397 /* Open the image */ 2398 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2399 if (!blk) { 2400 return 1; 2401 } 2402 bs = blk_bs(blk); 2403 2404 /* Perform the requested action */ 2405 switch(action) { 2406 case SNAPSHOT_LIST: 2407 dump_snapshots(bs); 2408 break; 2409 2410 case SNAPSHOT_CREATE: 2411 memset(&sn, 0, sizeof(sn)); 2412 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2413 2414 qemu_gettimeofday(&tv); 2415 sn.date_sec = tv.tv_sec; 2416 sn.date_nsec = tv.tv_usec * 1000; 2417 2418 ret = bdrv_snapshot_create(bs, &sn); 2419 if (ret) { 2420 error_report("Could not create snapshot '%s': %d (%s)", 2421 snapshot_name, ret, strerror(-ret)); 2422 } 2423 break; 2424 2425 case SNAPSHOT_APPLY: 2426 ret = bdrv_snapshot_goto(bs, snapshot_name); 2427 if (ret) { 2428 error_report("Could not apply snapshot '%s': %d (%s)", 2429 snapshot_name, ret, strerror(-ret)); 2430 } 2431 break; 2432 2433 case SNAPSHOT_DELETE: 2434 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2435 if (err) { 2436 error_reportf_err(err, "Could not delete snapshot '%s': ", 2437 snapshot_name); 2438 ret = 1; 2439 } 2440 break; 2441 } 2442 2443 /* Cleanup */ 2444 blk_unref(blk); 2445 if (ret) { 2446 return 1; 2447 } 2448 return 0; 2449 } 2450 2451 static int img_rebase(int argc, char **argv) 2452 { 2453 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2454 BlockDriverState *bs = NULL; 2455 char *filename; 2456 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2457 int c, flags, src_flags, ret; 2458 int unsafe = 0; 2459 int progress = 0; 2460 bool quiet = false; 2461 Error *local_err = NULL; 2462 2463 /* Parse commandline parameters */ 2464 fmt = NULL; 2465 cache = BDRV_DEFAULT_CACHE; 2466 src_cache = BDRV_DEFAULT_CACHE; 2467 out_baseimg = NULL; 2468 out_basefmt = NULL; 2469 for(;;) { 2470 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2471 if (c == -1) { 2472 break; 2473 } 2474 switch(c) { 2475 case '?': 2476 case 'h': 2477 help(); 2478 return 0; 2479 case 'f': 2480 fmt = optarg; 2481 break; 2482 case 'F': 2483 out_basefmt = optarg; 2484 break; 2485 case 'b': 2486 out_baseimg = optarg; 2487 break; 2488 case 'u': 2489 unsafe = 1; 2490 break; 2491 case 'p': 2492 progress = 1; 2493 break; 2494 case 't': 2495 cache = optarg; 2496 break; 2497 case 'T': 2498 src_cache = optarg; 2499 break; 2500 case 'q': 2501 quiet = true; 2502 break; 2503 } 2504 } 2505 2506 if (quiet) { 2507 progress = 0; 2508 } 2509 2510 if (optind != argc - 1) { 2511 error_exit("Expecting one image file name"); 2512 } 2513 if (!unsafe && !out_baseimg) { 2514 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2515 } 2516 filename = argv[optind++]; 2517 2518 qemu_progress_init(progress, 2.0); 2519 qemu_progress_print(0, 100); 2520 2521 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2522 ret = bdrv_parse_cache_flags(cache, &flags); 2523 if (ret < 0) { 2524 error_report("Invalid cache option: %s", cache); 2525 goto out; 2526 } 2527 2528 src_flags = BDRV_O_FLAGS; 2529 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2530 if (ret < 0) { 2531 error_report("Invalid source cache option: %s", src_cache); 2532 goto out; 2533 } 2534 2535 /* 2536 * Open the images. 2537 * 2538 * Ignore the old backing file for unsafe rebase in case we want to correct 2539 * the reference to a renamed or moved backing file. 2540 */ 2541 blk = img_open("image", filename, fmt, flags, true, quiet); 2542 if (!blk) { 2543 ret = -1; 2544 goto out; 2545 } 2546 bs = blk_bs(blk); 2547 2548 if (out_basefmt != NULL) { 2549 if (bdrv_find_format(out_basefmt) == NULL) { 2550 error_report("Invalid format name: '%s'", out_basefmt); 2551 ret = -1; 2552 goto out; 2553 } 2554 } 2555 2556 /* For safe rebasing we need to compare old and new backing file */ 2557 if (!unsafe) { 2558 char backing_name[PATH_MAX]; 2559 QDict *options = NULL; 2560 2561 if (bs->backing_format[0] != '\0') { 2562 options = qdict_new(); 2563 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2564 } 2565 2566 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2567 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2568 options, src_flags, &local_err); 2569 if (!blk_old_backing) { 2570 error_reportf_err(local_err, 2571 "Could not open old backing file '%s': ", 2572 backing_name); 2573 goto out; 2574 } 2575 2576 if (out_baseimg[0]) { 2577 if (out_basefmt) { 2578 options = qdict_new(); 2579 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2580 } else { 2581 options = NULL; 2582 } 2583 2584 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2585 options, src_flags, &local_err); 2586 if (!blk_new_backing) { 2587 error_reportf_err(local_err, 2588 "Could not open new backing file '%s': ", 2589 out_baseimg); 2590 goto out; 2591 } 2592 } 2593 } 2594 2595 /* 2596 * Check each unallocated cluster in the COW file. If it is unallocated, 2597 * accesses go to the backing file. We must therefore compare this cluster 2598 * in the old and new backing file, and if they differ we need to copy it 2599 * from the old backing file into the COW file. 2600 * 2601 * If qemu-img crashes during this step, no harm is done. The content of 2602 * the image is the same as the original one at any time. 2603 */ 2604 if (!unsafe) { 2605 int64_t num_sectors; 2606 int64_t old_backing_num_sectors; 2607 int64_t new_backing_num_sectors = 0; 2608 uint64_t sector; 2609 int n; 2610 uint8_t * buf_old; 2611 uint8_t * buf_new; 2612 float local_progress = 0; 2613 2614 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2615 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2616 2617 num_sectors = blk_nb_sectors(blk); 2618 if (num_sectors < 0) { 2619 error_report("Could not get size of '%s': %s", 2620 filename, strerror(-num_sectors)); 2621 ret = -1; 2622 goto out; 2623 } 2624 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2625 if (old_backing_num_sectors < 0) { 2626 char backing_name[PATH_MAX]; 2627 2628 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2629 error_report("Could not get size of '%s': %s", 2630 backing_name, strerror(-old_backing_num_sectors)); 2631 ret = -1; 2632 goto out; 2633 } 2634 if (blk_new_backing) { 2635 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2636 if (new_backing_num_sectors < 0) { 2637 error_report("Could not get size of '%s': %s", 2638 out_baseimg, strerror(-new_backing_num_sectors)); 2639 ret = -1; 2640 goto out; 2641 } 2642 } 2643 2644 if (num_sectors != 0) { 2645 local_progress = (float)100 / 2646 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2647 } 2648 2649 for (sector = 0; sector < num_sectors; sector += n) { 2650 2651 /* How many sectors can we handle with the next read? */ 2652 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2653 n = (IO_BUF_SIZE / 512); 2654 } else { 2655 n = num_sectors - sector; 2656 } 2657 2658 /* If the cluster is allocated, we don't need to take action */ 2659 ret = bdrv_is_allocated(bs, sector, n, &n); 2660 if (ret < 0) { 2661 error_report("error while reading image metadata: %s", 2662 strerror(-ret)); 2663 goto out; 2664 } 2665 if (ret) { 2666 continue; 2667 } 2668 2669 /* 2670 * Read old and new backing file and take into consideration that 2671 * backing files may be smaller than the COW image. 2672 */ 2673 if (sector >= old_backing_num_sectors) { 2674 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2675 } else { 2676 if (sector + n > old_backing_num_sectors) { 2677 n = old_backing_num_sectors - sector; 2678 } 2679 2680 ret = blk_read(blk_old_backing, sector, buf_old, n); 2681 if (ret < 0) { 2682 error_report("error while reading from old backing file"); 2683 goto out; 2684 } 2685 } 2686 2687 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2688 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2689 } else { 2690 if (sector + n > new_backing_num_sectors) { 2691 n = new_backing_num_sectors - sector; 2692 } 2693 2694 ret = blk_read(blk_new_backing, sector, buf_new, n); 2695 if (ret < 0) { 2696 error_report("error while reading from new backing file"); 2697 goto out; 2698 } 2699 } 2700 2701 /* If they differ, we need to write to the COW file */ 2702 uint64_t written = 0; 2703 2704 while (written < n) { 2705 int pnum; 2706 2707 if (compare_sectors(buf_old + written * 512, 2708 buf_new + written * 512, n - written, &pnum)) 2709 { 2710 ret = blk_write(blk, sector + written, 2711 buf_old + written * 512, pnum); 2712 if (ret < 0) { 2713 error_report("Error while writing to COW image: %s", 2714 strerror(-ret)); 2715 goto out; 2716 } 2717 } 2718 2719 written += pnum; 2720 } 2721 qemu_progress_print(local_progress, 100); 2722 } 2723 2724 qemu_vfree(buf_old); 2725 qemu_vfree(buf_new); 2726 } 2727 2728 /* 2729 * Change the backing file. All clusters that are different from the old 2730 * backing file are overwritten in the COW file now, so the visible content 2731 * doesn't change when we switch the backing file. 2732 */ 2733 if (out_baseimg && *out_baseimg) { 2734 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2735 } else { 2736 ret = bdrv_change_backing_file(bs, NULL, NULL); 2737 } 2738 2739 if (ret == -ENOSPC) { 2740 error_report("Could not change the backing file to '%s': No " 2741 "space left in the file header", out_baseimg); 2742 } else if (ret < 0) { 2743 error_report("Could not change the backing file to '%s': %s", 2744 out_baseimg, strerror(-ret)); 2745 } 2746 2747 qemu_progress_print(100, 0); 2748 /* 2749 * TODO At this point it is possible to check if any clusters that are 2750 * allocated in the COW file are the same in the backing file. If so, they 2751 * could be dropped from the COW file. Don't do this before switching the 2752 * backing file, in case of a crash this would lead to corruption. 2753 */ 2754 out: 2755 qemu_progress_end(); 2756 /* Cleanup */ 2757 if (!unsafe) { 2758 blk_unref(blk_old_backing); 2759 blk_unref(blk_new_backing); 2760 } 2761 2762 blk_unref(blk); 2763 if (ret) { 2764 return 1; 2765 } 2766 return 0; 2767 } 2768 2769 static int img_resize(int argc, char **argv) 2770 { 2771 Error *err = NULL; 2772 int c, ret, relative; 2773 const char *filename, *fmt, *size; 2774 int64_t n, total_size; 2775 bool quiet = false; 2776 BlockBackend *blk = NULL; 2777 QemuOpts *param; 2778 static QemuOptsList resize_options = { 2779 .name = "resize_options", 2780 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2781 .desc = { 2782 { 2783 .name = BLOCK_OPT_SIZE, 2784 .type = QEMU_OPT_SIZE, 2785 .help = "Virtual disk size" 2786 }, { 2787 /* end of list */ 2788 } 2789 }, 2790 }; 2791 2792 /* Remove size from argv manually so that negative numbers are not treated 2793 * as options by getopt. */ 2794 if (argc < 3) { 2795 error_exit("Not enough arguments"); 2796 return 1; 2797 } 2798 2799 size = argv[--argc]; 2800 2801 /* Parse getopt arguments */ 2802 fmt = NULL; 2803 for(;;) { 2804 c = getopt(argc, argv, "f:hq"); 2805 if (c == -1) { 2806 break; 2807 } 2808 switch(c) { 2809 case '?': 2810 case 'h': 2811 help(); 2812 break; 2813 case 'f': 2814 fmt = optarg; 2815 break; 2816 case 'q': 2817 quiet = true; 2818 break; 2819 } 2820 } 2821 if (optind != argc - 1) { 2822 error_exit("Expecting one image file name"); 2823 } 2824 filename = argv[optind++]; 2825 2826 /* Choose grow, shrink, or absolute resize mode */ 2827 switch (size[0]) { 2828 case '+': 2829 relative = 1; 2830 size++; 2831 break; 2832 case '-': 2833 relative = -1; 2834 size++; 2835 break; 2836 default: 2837 relative = 0; 2838 break; 2839 } 2840 2841 /* Parse size */ 2842 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2843 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2844 if (err) { 2845 error_report_err(err); 2846 ret = -1; 2847 qemu_opts_del(param); 2848 goto out; 2849 } 2850 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2851 qemu_opts_del(param); 2852 2853 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2854 true, quiet); 2855 if (!blk) { 2856 ret = -1; 2857 goto out; 2858 } 2859 2860 if (relative) { 2861 total_size = blk_getlength(blk) + n * relative; 2862 } else { 2863 total_size = n; 2864 } 2865 if (total_size <= 0) { 2866 error_report("New image size must be positive"); 2867 ret = -1; 2868 goto out; 2869 } 2870 2871 ret = blk_truncate(blk, total_size); 2872 switch (ret) { 2873 case 0: 2874 qprintf(quiet, "Image resized.\n"); 2875 break; 2876 case -ENOTSUP: 2877 error_report("This image does not support resize"); 2878 break; 2879 case -EACCES: 2880 error_report("Image is read-only"); 2881 break; 2882 default: 2883 error_report("Error resizing image (%d)", -ret); 2884 break; 2885 } 2886 out: 2887 blk_unref(blk); 2888 if (ret) { 2889 return 1; 2890 } 2891 return 0; 2892 } 2893 2894 static void amend_status_cb(BlockDriverState *bs, 2895 int64_t offset, int64_t total_work_size, 2896 void *opaque) 2897 { 2898 qemu_progress_print(100.f * offset / total_work_size, 0); 2899 } 2900 2901 static int img_amend(int argc, char **argv) 2902 { 2903 Error *err = NULL; 2904 int c, ret = 0; 2905 char *options = NULL; 2906 QemuOptsList *create_opts = NULL; 2907 QemuOpts *opts = NULL; 2908 const char *fmt = NULL, *filename, *cache; 2909 int flags; 2910 bool quiet = false, progress = false; 2911 BlockBackend *blk = NULL; 2912 BlockDriverState *bs = NULL; 2913 2914 cache = BDRV_DEFAULT_CACHE; 2915 for (;;) { 2916 c = getopt(argc, argv, "ho:f:t:pq"); 2917 if (c == -1) { 2918 break; 2919 } 2920 2921 switch (c) { 2922 case 'h': 2923 case '?': 2924 help(); 2925 break; 2926 case 'o': 2927 if (!is_valid_option_list(optarg)) { 2928 error_report("Invalid option list: %s", optarg); 2929 ret = -1; 2930 goto out_no_progress; 2931 } 2932 if (!options) { 2933 options = g_strdup(optarg); 2934 } else { 2935 char *old_options = options; 2936 options = g_strdup_printf("%s,%s", options, optarg); 2937 g_free(old_options); 2938 } 2939 break; 2940 case 'f': 2941 fmt = optarg; 2942 break; 2943 case 't': 2944 cache = optarg; 2945 break; 2946 case 'p': 2947 progress = true; 2948 break; 2949 case 'q': 2950 quiet = true; 2951 break; 2952 } 2953 } 2954 2955 if (!options) { 2956 error_exit("Must specify options (-o)"); 2957 } 2958 2959 if (quiet) { 2960 progress = false; 2961 } 2962 qemu_progress_init(progress, 1.0); 2963 2964 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2965 if (fmt && has_help_option(options)) { 2966 /* If a format is explicitly specified (and possibly no filename is 2967 * given), print option help here */ 2968 ret = print_block_option_help(filename, fmt); 2969 goto out; 2970 } 2971 2972 if (optind != argc - 1) { 2973 error_report("Expecting one image file name"); 2974 ret = -1; 2975 goto out; 2976 } 2977 2978 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2979 ret = bdrv_parse_cache_flags(cache, &flags); 2980 if (ret < 0) { 2981 error_report("Invalid cache option: %s", cache); 2982 goto out; 2983 } 2984 2985 blk = img_open("image", filename, fmt, flags, true, quiet); 2986 if (!blk) { 2987 ret = -1; 2988 goto out; 2989 } 2990 bs = blk_bs(blk); 2991 2992 fmt = bs->drv->format_name; 2993 2994 if (has_help_option(options)) { 2995 /* If the format was auto-detected, print option help here */ 2996 ret = print_block_option_help(filename, fmt); 2997 goto out; 2998 } 2999 3000 if (!bs->drv->create_opts) { 3001 error_report("Format driver '%s' does not support any options to amend", 3002 fmt); 3003 ret = -1; 3004 goto out; 3005 } 3006 3007 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3008 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3009 if (options) { 3010 qemu_opts_do_parse(opts, options, NULL, &err); 3011 if (err) { 3012 error_report_err(err); 3013 ret = -1; 3014 goto out; 3015 } 3016 } 3017 3018 /* In case the driver does not call amend_status_cb() */ 3019 qemu_progress_print(0.f, 0); 3020 ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); 3021 qemu_progress_print(100.f, 0); 3022 if (ret < 0) { 3023 error_report("Error while amending options: %s", strerror(-ret)); 3024 goto out; 3025 } 3026 3027 out: 3028 qemu_progress_end(); 3029 3030 out_no_progress: 3031 blk_unref(blk); 3032 qemu_opts_del(opts); 3033 qemu_opts_free(create_opts); 3034 g_free(options); 3035 3036 if (ret) { 3037 return 1; 3038 } 3039 return 0; 3040 } 3041 3042 static const img_cmd_t img_cmds[] = { 3043 #define DEF(option, callback, arg_string) \ 3044 { option, callback }, 3045 #include "qemu-img-cmds.h" 3046 #undef DEF 3047 #undef GEN_DOCS 3048 { NULL, NULL, }, 3049 }; 3050 3051 int main(int argc, char **argv) 3052 { 3053 const img_cmd_t *cmd; 3054 const char *cmdname; 3055 Error *local_error = NULL; 3056 int c; 3057 static const struct option long_options[] = { 3058 {"help", no_argument, 0, 'h'}, 3059 {"version", no_argument, 0, 'v'}, 3060 {0, 0, 0, 0} 3061 }; 3062 3063 #ifdef CONFIG_POSIX 3064 signal(SIGPIPE, SIG_IGN); 3065 #endif 3066 3067 error_set_progname(argv[0]); 3068 qemu_init_exec_dir(argv[0]); 3069 3070 if (qemu_init_main_loop(&local_error)) { 3071 error_report_err(local_error); 3072 exit(EXIT_FAILURE); 3073 } 3074 3075 bdrv_init(); 3076 if (argc < 2) { 3077 error_exit("Not enough arguments"); 3078 } 3079 cmdname = argv[1]; 3080 3081 /* find the command */ 3082 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3083 if (!strcmp(cmdname, cmd->name)) { 3084 return cmd->handler(argc - 1, argv + 1); 3085 } 3086 } 3087 3088 c = getopt_long(argc, argv, "h", long_options, NULL); 3089 3090 if (c == 'h') { 3091 help(); 3092 } 3093 if (c == 'v') { 3094 printf(QEMU_IMG_VERSION); 3095 return 0; 3096 } 3097 3098 /* not found */ 3099 error_exit("Command not found: %s", cmdname); 3100 } 3101