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_report("Could not open '%s': %s", filename, 217 error_get_pretty(local_err)); 218 error_free(local_err); 219 goto fail; 220 } 221 222 bs = blk_bs(blk); 223 if (bdrv_is_encrypted(bs) && require_io) { 224 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 225 if (qemu_read_password(password, sizeof(password)) < 0) { 226 error_report("No password given"); 227 goto fail; 228 } 229 if (bdrv_set_key(bs, password) < 0) { 230 error_report("invalid password"); 231 goto fail; 232 } 233 } 234 return blk; 235 fail: 236 blk_unref(blk); 237 return NULL; 238 } 239 240 static int add_old_style_options(const char *fmt, QemuOpts *opts, 241 const char *base_filename, 242 const char *base_fmt) 243 { 244 Error *err = NULL; 245 246 if (base_filename) { 247 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 248 if (err) { 249 error_report("Backing file not supported for file format '%s'", 250 fmt); 251 error_free(err); 252 return -1; 253 } 254 } 255 if (base_fmt) { 256 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 257 if (err) { 258 error_report("Backing file format not supported for file " 259 "format '%s'", fmt); 260 error_free(err); 261 return -1; 262 } 263 } 264 return 0; 265 } 266 267 static int img_create(int argc, char **argv) 268 { 269 int c; 270 uint64_t img_size = -1; 271 const char *fmt = "raw"; 272 const char *base_fmt = NULL; 273 const char *filename; 274 const char *base_filename = NULL; 275 char *options = NULL; 276 Error *local_err = NULL; 277 bool quiet = false; 278 279 for(;;) { 280 c = getopt(argc, argv, "F:b:f:he6o:q"); 281 if (c == -1) { 282 break; 283 } 284 switch(c) { 285 case '?': 286 case 'h': 287 help(); 288 break; 289 case 'F': 290 base_fmt = optarg; 291 break; 292 case 'b': 293 base_filename = optarg; 294 break; 295 case 'f': 296 fmt = optarg; 297 break; 298 case 'e': 299 error_report("option -e is deprecated, please use \'-o " 300 "encryption\' instead!"); 301 goto fail; 302 case '6': 303 error_report("option -6 is deprecated, please use \'-o " 304 "compat6\' instead!"); 305 goto fail; 306 case 'o': 307 if (!is_valid_option_list(optarg)) { 308 error_report("Invalid option list: %s", optarg); 309 goto fail; 310 } 311 if (!options) { 312 options = g_strdup(optarg); 313 } else { 314 char *old_options = options; 315 options = g_strdup_printf("%s,%s", options, optarg); 316 g_free(old_options); 317 } 318 break; 319 case 'q': 320 quiet = true; 321 break; 322 } 323 } 324 325 /* Get the filename */ 326 filename = (optind < argc) ? argv[optind] : NULL; 327 if (options && has_help_option(options)) { 328 g_free(options); 329 return print_block_option_help(filename, fmt); 330 } 331 332 if (optind >= argc) { 333 error_exit("Expecting image file name"); 334 } 335 optind++; 336 337 /* Get image size, if specified */ 338 if (optind < argc) { 339 int64_t sval; 340 char *end; 341 sval = qemu_strtosz_suffix(argv[optind++], &end, 342 QEMU_STRTOSZ_DEFSUFFIX_B); 343 if (sval < 0 || *end) { 344 if (sval == -ERANGE) { 345 error_report("Image size must be less than 8 EiB!"); 346 } else { 347 error_report("Invalid image size specified! You may use k, M, " 348 "G, T, P or E suffixes for "); 349 error_report("kilobytes, megabytes, gigabytes, terabytes, " 350 "petabytes and exabytes."); 351 } 352 goto fail; 353 } 354 img_size = (uint64_t)sval; 355 } 356 if (optind != argc) { 357 error_exit("Unexpected argument: %s", argv[optind]); 358 } 359 360 bdrv_img_create(filename, fmt, base_filename, base_fmt, 361 options, img_size, BDRV_O_FLAGS, &local_err, quiet); 362 if (local_err) { 363 error_report("%s: %s", filename, error_get_pretty(local_err)); 364 error_free(local_err); 365 goto fail; 366 } 367 368 g_free(options); 369 return 0; 370 371 fail: 372 g_free(options); 373 return 1; 374 } 375 376 static void dump_json_image_check(ImageCheck *check, bool quiet) 377 { 378 Error *local_err = NULL; 379 QString *str; 380 QmpOutputVisitor *ov = qmp_output_visitor_new(); 381 QObject *obj; 382 visit_type_ImageCheck(qmp_output_get_visitor(ov), 383 &check, NULL, &local_err); 384 obj = qmp_output_get_qobject(ov); 385 str = qobject_to_json_pretty(obj); 386 assert(str != NULL); 387 qprintf(quiet, "%s\n", qstring_get_str(str)); 388 qobject_decref(obj); 389 qmp_output_visitor_cleanup(ov); 390 QDECREF(str); 391 } 392 393 static void dump_human_image_check(ImageCheck *check, bool quiet) 394 { 395 if (!(check->corruptions || check->leaks || check->check_errors)) { 396 qprintf(quiet, "No errors were found on the image.\n"); 397 } else { 398 if (check->corruptions) { 399 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 400 "Data may be corrupted, or further writes to the image " 401 "may corrupt it.\n", 402 check->corruptions); 403 } 404 405 if (check->leaks) { 406 qprintf(quiet, 407 "\n%" PRId64 " leaked clusters were found on the image.\n" 408 "This means waste of disk space, but no harm to data.\n", 409 check->leaks); 410 } 411 412 if (check->check_errors) { 413 qprintf(quiet, 414 "\n%" PRId64 415 " internal errors have occurred during the check.\n", 416 check->check_errors); 417 } 418 } 419 420 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 421 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 422 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 423 check->allocated_clusters, check->total_clusters, 424 check->allocated_clusters * 100.0 / check->total_clusters, 425 check->fragmented_clusters * 100.0 / check->allocated_clusters, 426 check->compressed_clusters * 100.0 / 427 check->allocated_clusters); 428 } 429 430 if (check->image_end_offset) { 431 qprintf(quiet, 432 "Image end offset: %" PRId64 "\n", check->image_end_offset); 433 } 434 } 435 436 static int collect_image_check(BlockDriverState *bs, 437 ImageCheck *check, 438 const char *filename, 439 const char *fmt, 440 int fix) 441 { 442 int ret; 443 BdrvCheckResult result; 444 445 ret = bdrv_check(bs, &result, fix); 446 if (ret < 0) { 447 return ret; 448 } 449 450 check->filename = g_strdup(filename); 451 check->format = g_strdup(bdrv_get_format_name(bs)); 452 check->check_errors = result.check_errors; 453 check->corruptions = result.corruptions; 454 check->has_corruptions = result.corruptions != 0; 455 check->leaks = result.leaks; 456 check->has_leaks = result.leaks != 0; 457 check->corruptions_fixed = result.corruptions_fixed; 458 check->has_corruptions_fixed = result.corruptions != 0; 459 check->leaks_fixed = result.leaks_fixed; 460 check->has_leaks_fixed = result.leaks != 0; 461 check->image_end_offset = result.image_end_offset; 462 check->has_image_end_offset = result.image_end_offset != 0; 463 check->total_clusters = result.bfi.total_clusters; 464 check->has_total_clusters = result.bfi.total_clusters != 0; 465 check->allocated_clusters = result.bfi.allocated_clusters; 466 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 467 check->fragmented_clusters = result.bfi.fragmented_clusters; 468 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 469 check->compressed_clusters = result.bfi.compressed_clusters; 470 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 471 472 return 0; 473 } 474 475 /* 476 * Checks an image for consistency. Exit codes: 477 * 478 * 0 - Check completed, image is good 479 * 1 - Check not completed because of internal errors 480 * 2 - Check completed, image is corrupted 481 * 3 - Check completed, image has leaked clusters, but is good otherwise 482 * 63 - Checks are not supported by the image format 483 */ 484 static int img_check(int argc, char **argv) 485 { 486 int c, ret; 487 OutputFormat output_format = OFORMAT_HUMAN; 488 const char *filename, *fmt, *output, *cache; 489 BlockBackend *blk; 490 BlockDriverState *bs; 491 int fix = 0; 492 int flags = BDRV_O_FLAGS | BDRV_O_CHECK; 493 ImageCheck *check; 494 bool quiet = false; 495 496 fmt = NULL; 497 output = NULL; 498 cache = BDRV_DEFAULT_CACHE; 499 for(;;) { 500 int option_index = 0; 501 static const struct option long_options[] = { 502 {"help", no_argument, 0, 'h'}, 503 {"format", required_argument, 0, 'f'}, 504 {"repair", required_argument, 0, 'r'}, 505 {"output", required_argument, 0, OPTION_OUTPUT}, 506 {0, 0, 0, 0} 507 }; 508 c = getopt_long(argc, argv, "hf:r:T:q", 509 long_options, &option_index); 510 if (c == -1) { 511 break; 512 } 513 switch(c) { 514 case '?': 515 case 'h': 516 help(); 517 break; 518 case 'f': 519 fmt = optarg; 520 break; 521 case 'r': 522 flags |= BDRV_O_RDWR; 523 524 if (!strcmp(optarg, "leaks")) { 525 fix = BDRV_FIX_LEAKS; 526 } else if (!strcmp(optarg, "all")) { 527 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 528 } else { 529 error_exit("Unknown option value for -r " 530 "(expecting 'leaks' or 'all'): %s", optarg); 531 } 532 break; 533 case OPTION_OUTPUT: 534 output = optarg; 535 break; 536 case 'T': 537 cache = optarg; 538 break; 539 case 'q': 540 quiet = true; 541 break; 542 } 543 } 544 if (optind != argc - 1) { 545 error_exit("Expecting one image file name"); 546 } 547 filename = argv[optind++]; 548 549 if (output && !strcmp(output, "json")) { 550 output_format = OFORMAT_JSON; 551 } else if (output && !strcmp(output, "human")) { 552 output_format = OFORMAT_HUMAN; 553 } else if (output) { 554 error_report("--output must be used with human or json as argument."); 555 return 1; 556 } 557 558 ret = bdrv_parse_cache_flags(cache, &flags); 559 if (ret < 0) { 560 error_report("Invalid source cache option: %s", cache); 561 return 1; 562 } 563 564 blk = img_open("image", filename, fmt, flags, true, quiet); 565 if (!blk) { 566 return 1; 567 } 568 bs = blk_bs(blk); 569 570 check = g_new0(ImageCheck, 1); 571 ret = collect_image_check(bs, check, filename, fmt, fix); 572 573 if (ret == -ENOTSUP) { 574 error_report("This image format does not support checks"); 575 ret = 63; 576 goto fail; 577 } 578 579 if (check->corruptions_fixed || check->leaks_fixed) { 580 int corruptions_fixed, leaks_fixed; 581 582 leaks_fixed = check->leaks_fixed; 583 corruptions_fixed = check->corruptions_fixed; 584 585 if (output_format == OFORMAT_HUMAN) { 586 qprintf(quiet, 587 "The following inconsistencies were found and repaired:\n\n" 588 " %" PRId64 " leaked clusters\n" 589 " %" PRId64 " corruptions\n\n" 590 "Double checking the fixed image now...\n", 591 check->leaks_fixed, 592 check->corruptions_fixed); 593 } 594 595 ret = collect_image_check(bs, check, filename, fmt, 0); 596 597 check->leaks_fixed = leaks_fixed; 598 check->corruptions_fixed = corruptions_fixed; 599 } 600 601 if (!ret) { 602 switch (output_format) { 603 case OFORMAT_HUMAN: 604 dump_human_image_check(check, quiet); 605 break; 606 case OFORMAT_JSON: 607 dump_json_image_check(check, quiet); 608 break; 609 } 610 } 611 612 if (ret || check->check_errors) { 613 if (ret) { 614 error_report("Check failed: %s", strerror(-ret)); 615 } else { 616 error_report("Check failed"); 617 } 618 ret = 1; 619 goto fail; 620 } 621 622 if (check->corruptions) { 623 ret = 2; 624 } else if (check->leaks) { 625 ret = 3; 626 } else { 627 ret = 0; 628 } 629 630 fail: 631 qapi_free_ImageCheck(check); 632 blk_unref(blk); 633 return ret; 634 } 635 636 typedef struct CommonBlockJobCBInfo { 637 BlockDriverState *bs; 638 Error **errp; 639 } CommonBlockJobCBInfo; 640 641 static void common_block_job_cb(void *opaque, int ret) 642 { 643 CommonBlockJobCBInfo *cbi = opaque; 644 645 if (ret < 0) { 646 error_setg_errno(cbi->errp, -ret, "Block job failed"); 647 } 648 649 /* Drop this block job's reference */ 650 bdrv_unref(cbi->bs); 651 } 652 653 static void run_block_job(BlockJob *job, Error **errp) 654 { 655 AioContext *aio_context = bdrv_get_aio_context(job->bs); 656 657 do { 658 aio_poll(aio_context, true); 659 qemu_progress_print(job->len ? 660 ((float)job->offset / job->len * 100.f) : 0.0f, 0); 661 } while (!job->ready); 662 663 block_job_complete_sync(job, errp); 664 665 /* A block job may finish instantaneously without publishing any progress, 666 * so just signal completion here */ 667 qemu_progress_print(100.f, 0); 668 } 669 670 static int img_commit(int argc, char **argv) 671 { 672 int c, ret, flags; 673 const char *filename, *fmt, *cache, *base; 674 BlockBackend *blk; 675 BlockDriverState *bs, *base_bs; 676 bool progress = false, quiet = false, drop = false; 677 Error *local_err = NULL; 678 CommonBlockJobCBInfo cbi; 679 680 fmt = NULL; 681 cache = BDRV_DEFAULT_CACHE; 682 base = NULL; 683 for(;;) { 684 c = getopt(argc, argv, "f:ht:b:dpq"); 685 if (c == -1) { 686 break; 687 } 688 switch(c) { 689 case '?': 690 case 'h': 691 help(); 692 break; 693 case 'f': 694 fmt = optarg; 695 break; 696 case 't': 697 cache = optarg; 698 break; 699 case 'b': 700 base = optarg; 701 /* -b implies -d */ 702 drop = true; 703 break; 704 case 'd': 705 drop = true; 706 break; 707 case 'p': 708 progress = true; 709 break; 710 case 'q': 711 quiet = true; 712 break; 713 } 714 } 715 716 /* Progress is not shown in Quiet mode */ 717 if (quiet) { 718 progress = false; 719 } 720 721 if (optind != argc - 1) { 722 error_exit("Expecting one image file name"); 723 } 724 filename = argv[optind++]; 725 726 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 727 ret = bdrv_parse_cache_flags(cache, &flags); 728 if (ret < 0) { 729 error_report("Invalid cache option: %s", cache); 730 return 1; 731 } 732 733 blk = img_open("image", filename, fmt, flags, true, quiet); 734 if (!blk) { 735 return 1; 736 } 737 bs = blk_bs(blk); 738 739 qemu_progress_init(progress, 1.f); 740 qemu_progress_print(0.f, 100); 741 742 if (base) { 743 base_bs = bdrv_find_backing_image(bs, base); 744 if (!base_bs) { 745 error_setg(&local_err, QERR_BASE_NOT_FOUND, base); 746 goto done; 747 } 748 } else { 749 /* This is different from QMP, which by default uses the deepest file in 750 * the backing chain (i.e., the very base); however, the traditional 751 * behavior of qemu-img commit is using the immediate backing file. */ 752 base_bs = backing_bs(bs); 753 if (!base_bs) { 754 error_setg(&local_err, "Image does not have a backing file"); 755 goto done; 756 } 757 } 758 759 cbi = (CommonBlockJobCBInfo){ 760 .errp = &local_err, 761 .bs = bs, 762 }; 763 764 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 765 common_block_job_cb, &cbi, &local_err); 766 if (local_err) { 767 goto done; 768 } 769 770 /* When the block job completes, the BlockBackend reference will point to 771 * the old backing file. In order to avoid that the top image is already 772 * deleted, so we can still empty it afterwards, increment the reference 773 * counter here preemptively. */ 774 if (!drop) { 775 bdrv_ref(bs); 776 } 777 778 run_block_job(bs->job, &local_err); 779 if (local_err) { 780 goto unref_backing; 781 } 782 783 if (!drop && bs->drv->bdrv_make_empty) { 784 ret = bs->drv->bdrv_make_empty(bs); 785 if (ret) { 786 error_setg_errno(&local_err, -ret, "Could not empty %s", 787 filename); 788 goto unref_backing; 789 } 790 } 791 792 unref_backing: 793 if (!drop) { 794 bdrv_unref(bs); 795 } 796 797 done: 798 qemu_progress_end(); 799 800 blk_unref(blk); 801 802 if (local_err) { 803 error_report_err(local_err); 804 return 1; 805 } 806 807 qprintf(quiet, "Image committed.\n"); 808 return 0; 809 } 810 811 /* 812 * Returns true iff the first sector pointed to by 'buf' contains at least 813 * a non-NUL byte. 814 * 815 * 'pnum' is set to the number of sectors (including and immediately following 816 * the first one) that are known to be in the same allocated/unallocated state. 817 */ 818 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 819 { 820 bool is_zero; 821 int i; 822 823 if (n <= 0) { 824 *pnum = 0; 825 return 0; 826 } 827 is_zero = buffer_is_zero(buf, 512); 828 for(i = 1; i < n; i++) { 829 buf += 512; 830 if (is_zero != buffer_is_zero(buf, 512)) { 831 break; 832 } 833 } 834 *pnum = i; 835 return !is_zero; 836 } 837 838 /* 839 * Like is_allocated_sectors, but if the buffer starts with a used sector, 840 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 841 * breaking up write requests for only small sparse areas. 842 */ 843 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 844 int min) 845 { 846 int ret; 847 int num_checked, num_used; 848 849 if (n < min) { 850 min = n; 851 } 852 853 ret = is_allocated_sectors(buf, n, pnum); 854 if (!ret) { 855 return ret; 856 } 857 858 num_used = *pnum; 859 buf += BDRV_SECTOR_SIZE * *pnum; 860 n -= *pnum; 861 num_checked = num_used; 862 863 while (n > 0) { 864 ret = is_allocated_sectors(buf, n, pnum); 865 866 buf += BDRV_SECTOR_SIZE * *pnum; 867 n -= *pnum; 868 num_checked += *pnum; 869 if (ret) { 870 num_used = num_checked; 871 } else if (*pnum >= min) { 872 break; 873 } 874 } 875 876 *pnum = num_used; 877 return 1; 878 } 879 880 /* 881 * Compares two buffers sector by sector. Returns 0 if the first sector of both 882 * buffers matches, non-zero otherwise. 883 * 884 * pnum is set to the number of sectors (including and immediately following 885 * the first one) that are known to have the same comparison result 886 */ 887 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 888 int *pnum) 889 { 890 bool res; 891 int i; 892 893 if (n <= 0) { 894 *pnum = 0; 895 return 0; 896 } 897 898 res = !!memcmp(buf1, buf2, 512); 899 for(i = 1; i < n; i++) { 900 buf1 += 512; 901 buf2 += 512; 902 903 if (!!memcmp(buf1, buf2, 512) != res) { 904 break; 905 } 906 } 907 908 *pnum = i; 909 return res; 910 } 911 912 #define IO_BUF_SIZE (2 * 1024 * 1024) 913 914 static int64_t sectors_to_bytes(int64_t sectors) 915 { 916 return sectors << BDRV_SECTOR_BITS; 917 } 918 919 static int64_t sectors_to_process(int64_t total, int64_t from) 920 { 921 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 922 } 923 924 /* 925 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 926 * 927 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 928 * data and negative value on error. 929 * 930 * @param blk: BlockBackend for the image 931 * @param sect_num: Number of first sector to check 932 * @param sect_count: Number of sectors to check 933 * @param filename: Name of disk file we are checking (logging purpose) 934 * @param buffer: Allocated buffer for storing read data 935 * @param quiet: Flag for quiet mode 936 */ 937 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 938 int sect_count, const char *filename, 939 uint8_t *buffer, bool quiet) 940 { 941 int pnum, ret = 0; 942 ret = blk_read(blk, sect_num, buffer, sect_count); 943 if (ret < 0) { 944 error_report("Error while reading offset %" PRId64 " of %s: %s", 945 sectors_to_bytes(sect_num), filename, strerror(-ret)); 946 return ret; 947 } 948 ret = is_allocated_sectors(buffer, sect_count, &pnum); 949 if (ret || pnum != sect_count) { 950 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 951 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 952 return 1; 953 } 954 955 return 0; 956 } 957 958 /* 959 * Compares two images. Exit codes: 960 * 961 * 0 - Images are identical 962 * 1 - Images differ 963 * >1 - Error occurred 964 */ 965 static int img_compare(int argc, char **argv) 966 { 967 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 968 BlockBackend *blk1, *blk2; 969 BlockDriverState *bs1, *bs2; 970 int64_t total_sectors1, total_sectors2; 971 uint8_t *buf1 = NULL, *buf2 = NULL; 972 int pnum1, pnum2; 973 int allocated1, allocated2; 974 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 975 bool progress = false, quiet = false, strict = false; 976 int flags; 977 int64_t total_sectors; 978 int64_t sector_num = 0; 979 int64_t nb_sectors; 980 int c, pnum; 981 uint64_t progress_base; 982 983 cache = BDRV_DEFAULT_CACHE; 984 for (;;) { 985 c = getopt(argc, argv, "hf:F:T:pqs"); 986 if (c == -1) { 987 break; 988 } 989 switch (c) { 990 case '?': 991 case 'h': 992 help(); 993 break; 994 case 'f': 995 fmt1 = optarg; 996 break; 997 case 'F': 998 fmt2 = optarg; 999 break; 1000 case 'T': 1001 cache = optarg; 1002 break; 1003 case 'p': 1004 progress = true; 1005 break; 1006 case 'q': 1007 quiet = true; 1008 break; 1009 case 's': 1010 strict = true; 1011 break; 1012 } 1013 } 1014 1015 /* Progress is not shown in Quiet mode */ 1016 if (quiet) { 1017 progress = false; 1018 } 1019 1020 1021 if (optind != argc - 2) { 1022 error_exit("Expecting two image file names"); 1023 } 1024 filename1 = argv[optind++]; 1025 filename2 = argv[optind++]; 1026 1027 /* Initialize before goto out */ 1028 qemu_progress_init(progress, 2.0); 1029 1030 flags = BDRV_O_FLAGS; 1031 ret = bdrv_parse_cache_flags(cache, &flags); 1032 if (ret < 0) { 1033 error_report("Invalid source cache option: %s", cache); 1034 ret = 2; 1035 goto out3; 1036 } 1037 1038 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); 1039 if (!blk1) { 1040 ret = 2; 1041 goto out3; 1042 } 1043 bs1 = blk_bs(blk1); 1044 1045 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1046 if (!blk2) { 1047 ret = 2; 1048 goto out2; 1049 } 1050 bs2 = blk_bs(blk2); 1051 1052 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1053 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1054 total_sectors1 = blk_nb_sectors(blk1); 1055 if (total_sectors1 < 0) { 1056 error_report("Can't get size of %s: %s", 1057 filename1, strerror(-total_sectors1)); 1058 ret = 4; 1059 goto out; 1060 } 1061 total_sectors2 = blk_nb_sectors(blk2); 1062 if (total_sectors2 < 0) { 1063 error_report("Can't get size of %s: %s", 1064 filename2, strerror(-total_sectors2)); 1065 ret = 4; 1066 goto out; 1067 } 1068 total_sectors = MIN(total_sectors1, total_sectors2); 1069 progress_base = MAX(total_sectors1, total_sectors2); 1070 1071 qemu_progress_print(0, 100); 1072 1073 if (strict && total_sectors1 != total_sectors2) { 1074 ret = 1; 1075 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1076 goto out; 1077 } 1078 1079 for (;;) { 1080 nb_sectors = sectors_to_process(total_sectors, sector_num); 1081 if (nb_sectors <= 0) { 1082 break; 1083 } 1084 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, 1085 &pnum1); 1086 if (allocated1 < 0) { 1087 ret = 3; 1088 error_report("Sector allocation test failed for %s", filename1); 1089 goto out; 1090 } 1091 1092 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, 1093 &pnum2); 1094 if (allocated2 < 0) { 1095 ret = 3; 1096 error_report("Sector allocation test failed for %s", filename2); 1097 goto out; 1098 } 1099 nb_sectors = MIN(pnum1, pnum2); 1100 1101 if (allocated1 == allocated2) { 1102 if (allocated1) { 1103 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1104 if (ret < 0) { 1105 error_report("Error while reading offset %" PRId64 " of %s:" 1106 " %s", sectors_to_bytes(sector_num), filename1, 1107 strerror(-ret)); 1108 ret = 4; 1109 goto out; 1110 } 1111 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1112 if (ret < 0) { 1113 error_report("Error while reading offset %" PRId64 1114 " of %s: %s", sectors_to_bytes(sector_num), 1115 filename2, strerror(-ret)); 1116 ret = 4; 1117 goto out; 1118 } 1119 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1120 if (ret || pnum != nb_sectors) { 1121 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1122 sectors_to_bytes( 1123 ret ? sector_num : sector_num + pnum)); 1124 ret = 1; 1125 goto out; 1126 } 1127 } 1128 } else { 1129 if (strict) { 1130 ret = 1; 1131 qprintf(quiet, "Strict mode: Offset %" PRId64 1132 " allocation mismatch!\n", 1133 sectors_to_bytes(sector_num)); 1134 goto out; 1135 } 1136 1137 if (allocated1) { 1138 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1139 filename1, buf1, quiet); 1140 } else { 1141 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1142 filename2, buf1, quiet); 1143 } 1144 if (ret) { 1145 if (ret < 0) { 1146 error_report("Error while reading offset %" PRId64 ": %s", 1147 sectors_to_bytes(sector_num), strerror(-ret)); 1148 ret = 4; 1149 } 1150 goto out; 1151 } 1152 } 1153 sector_num += nb_sectors; 1154 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1155 } 1156 1157 if (total_sectors1 != total_sectors2) { 1158 BlockBackend *blk_over; 1159 int64_t total_sectors_over; 1160 const char *filename_over; 1161 1162 qprintf(quiet, "Warning: Image size mismatch!\n"); 1163 if (total_sectors1 > total_sectors2) { 1164 total_sectors_over = total_sectors1; 1165 blk_over = blk1; 1166 filename_over = filename1; 1167 } else { 1168 total_sectors_over = total_sectors2; 1169 blk_over = blk2; 1170 filename_over = filename2; 1171 } 1172 1173 for (;;) { 1174 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1175 if (nb_sectors <= 0) { 1176 break; 1177 } 1178 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1179 nb_sectors, &pnum); 1180 if (ret < 0) { 1181 ret = 3; 1182 error_report("Sector allocation test failed for %s", 1183 filename_over); 1184 goto out; 1185 1186 } 1187 nb_sectors = pnum; 1188 if (ret) { 1189 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1190 filename_over, buf1, quiet); 1191 if (ret) { 1192 if (ret < 0) { 1193 error_report("Error while reading offset %" PRId64 1194 " of %s: %s", sectors_to_bytes(sector_num), 1195 filename_over, strerror(-ret)); 1196 ret = 4; 1197 } 1198 goto out; 1199 } 1200 } 1201 sector_num += nb_sectors; 1202 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1203 } 1204 } 1205 1206 qprintf(quiet, "Images are identical.\n"); 1207 ret = 0; 1208 1209 out: 1210 qemu_vfree(buf1); 1211 qemu_vfree(buf2); 1212 blk_unref(blk2); 1213 out2: 1214 blk_unref(blk1); 1215 out3: 1216 qemu_progress_end(); 1217 return ret; 1218 } 1219 1220 enum ImgConvertBlockStatus { 1221 BLK_DATA, 1222 BLK_ZERO, 1223 BLK_BACKING_FILE, 1224 }; 1225 1226 typedef struct ImgConvertState { 1227 BlockBackend **src; 1228 int64_t *src_sectors; 1229 int src_cur, src_num; 1230 int64_t src_cur_offset; 1231 int64_t total_sectors; 1232 int64_t allocated_sectors; 1233 enum ImgConvertBlockStatus status; 1234 int64_t sector_next_status; 1235 BlockBackend *target; 1236 bool has_zero_init; 1237 bool compressed; 1238 bool target_has_backing; 1239 int min_sparse; 1240 size_t cluster_sectors; 1241 size_t buf_sectors; 1242 } ImgConvertState; 1243 1244 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1245 { 1246 assert(sector_num >= s->src_cur_offset); 1247 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1248 s->src_cur_offset += s->src_sectors[s->src_cur]; 1249 s->src_cur++; 1250 assert(s->src_cur < s->src_num); 1251 } 1252 } 1253 1254 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1255 { 1256 int64_t ret; 1257 int n; 1258 1259 convert_select_part(s, sector_num); 1260 1261 assert(s->total_sectors > sector_num); 1262 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1263 1264 if (s->sector_next_status <= sector_num) { 1265 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1266 sector_num - s->src_cur_offset, 1267 n, &n); 1268 if (ret < 0) { 1269 return ret; 1270 } 1271 1272 if (ret & BDRV_BLOCK_ZERO) { 1273 s->status = BLK_ZERO; 1274 } else if (ret & BDRV_BLOCK_DATA) { 1275 s->status = BLK_DATA; 1276 } else if (!s->target_has_backing) { 1277 /* Without a target backing file we must copy over the contents of 1278 * the backing file as well. */ 1279 /* TODO Check block status of the backing file chain to avoid 1280 * needlessly reading zeroes and limiting the iteration to the 1281 * buffer size */ 1282 s->status = BLK_DATA; 1283 } else { 1284 s->status = BLK_BACKING_FILE; 1285 } 1286 1287 s->sector_next_status = sector_num + n; 1288 } 1289 1290 n = MIN(n, s->sector_next_status - sector_num); 1291 if (s->status == BLK_DATA) { 1292 n = MIN(n, s->buf_sectors); 1293 } 1294 1295 /* We need to write complete clusters for compressed images, so if an 1296 * unallocated area is shorter than that, we must consider the whole 1297 * cluster allocated. */ 1298 if (s->compressed) { 1299 if (n < s->cluster_sectors) { 1300 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1301 s->status = BLK_DATA; 1302 } else { 1303 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1304 } 1305 } 1306 1307 return n; 1308 } 1309 1310 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1311 uint8_t *buf) 1312 { 1313 int n; 1314 int ret; 1315 1316 if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { 1317 return 0; 1318 } 1319 1320 assert(nb_sectors <= s->buf_sectors); 1321 while (nb_sectors > 0) { 1322 BlockBackend *blk; 1323 int64_t bs_sectors; 1324 1325 /* In the case of compression with multiple source files, we can get a 1326 * nb_sectors that spreads into the next part. So we must be able to 1327 * read across multiple BDSes for one convert_read() call. */ 1328 convert_select_part(s, sector_num); 1329 blk = s->src[s->src_cur]; 1330 bs_sectors = s->src_sectors[s->src_cur]; 1331 1332 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1333 ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); 1334 if (ret < 0) { 1335 return ret; 1336 } 1337 1338 sector_num += n; 1339 nb_sectors -= n; 1340 buf += n * BDRV_SECTOR_SIZE; 1341 } 1342 1343 return 0; 1344 } 1345 1346 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1347 const uint8_t *buf) 1348 { 1349 int ret; 1350 1351 while (nb_sectors > 0) { 1352 int n = nb_sectors; 1353 1354 switch (s->status) { 1355 case BLK_BACKING_FILE: 1356 /* If we have a backing file, leave clusters unallocated that are 1357 * unallocated in the source image, so that the backing file is 1358 * visible at the respective offset. */ 1359 assert(s->target_has_backing); 1360 break; 1361 1362 case BLK_DATA: 1363 /* We must always write compressed clusters as a whole, so don't 1364 * try to find zeroed parts in the buffer. We can only save the 1365 * write if the buffer is completely zeroed and we're allowed to 1366 * keep the target sparse. */ 1367 if (s->compressed) { 1368 if (s->has_zero_init && s->min_sparse && 1369 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1370 { 1371 assert(!s->target_has_backing); 1372 break; 1373 } 1374 1375 ret = blk_write_compressed(s->target, sector_num, buf, n); 1376 if (ret < 0) { 1377 return ret; 1378 } 1379 break; 1380 } 1381 1382 /* If there is real non-zero data or we're told to keep the target 1383 * fully allocated (-S 0), we must write it. Otherwise we can treat 1384 * it as zero sectors. */ 1385 if (!s->min_sparse || 1386 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1387 { 1388 ret = blk_write(s->target, sector_num, buf, n); 1389 if (ret < 0) { 1390 return ret; 1391 } 1392 break; 1393 } 1394 /* fall-through */ 1395 1396 case BLK_ZERO: 1397 if (s->has_zero_init) { 1398 break; 1399 } 1400 ret = blk_write_zeroes(s->target, sector_num, n, 0); 1401 if (ret < 0) { 1402 return ret; 1403 } 1404 break; 1405 } 1406 1407 sector_num += n; 1408 nb_sectors -= n; 1409 buf += n * BDRV_SECTOR_SIZE; 1410 } 1411 1412 return 0; 1413 } 1414 1415 static int convert_do_copy(ImgConvertState *s) 1416 { 1417 uint8_t *buf = NULL; 1418 int64_t sector_num, allocated_done; 1419 int ret; 1420 int n; 1421 1422 /* Check whether we have zero initialisation or can get it efficiently */ 1423 s->has_zero_init = s->min_sparse && !s->target_has_backing 1424 ? bdrv_has_zero_init(blk_bs(s->target)) 1425 : false; 1426 1427 if (!s->has_zero_init && !s->target_has_backing && 1428 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1429 { 1430 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1431 if (ret == 0) { 1432 s->has_zero_init = true; 1433 } 1434 } 1435 1436 /* Allocate buffer for copied data. For compressed images, only one cluster 1437 * can be copied at a time. */ 1438 if (s->compressed) { 1439 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1440 error_report("invalid cluster size"); 1441 ret = -EINVAL; 1442 goto fail; 1443 } 1444 s->buf_sectors = s->cluster_sectors; 1445 } 1446 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1447 1448 /* Calculate allocated sectors for progress */ 1449 s->allocated_sectors = 0; 1450 sector_num = 0; 1451 while (sector_num < s->total_sectors) { 1452 n = convert_iteration_sectors(s, sector_num); 1453 if (n < 0) { 1454 ret = n; 1455 goto fail; 1456 } 1457 if (s->status == BLK_DATA) { 1458 s->allocated_sectors += n; 1459 } 1460 sector_num += n; 1461 } 1462 1463 /* Do the copy */ 1464 s->src_cur = 0; 1465 s->src_cur_offset = 0; 1466 s->sector_next_status = 0; 1467 1468 sector_num = 0; 1469 allocated_done = 0; 1470 1471 while (sector_num < s->total_sectors) { 1472 n = convert_iteration_sectors(s, sector_num); 1473 if (n < 0) { 1474 ret = n; 1475 goto fail; 1476 } 1477 if (s->status == BLK_DATA) { 1478 allocated_done += n; 1479 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1480 0); 1481 } 1482 1483 ret = convert_read(s, sector_num, n, buf); 1484 if (ret < 0) { 1485 error_report("error while reading sector %" PRId64 1486 ": %s", sector_num, strerror(-ret)); 1487 goto fail; 1488 } 1489 1490 ret = convert_write(s, sector_num, n, buf); 1491 if (ret < 0) { 1492 error_report("error while writing sector %" PRId64 1493 ": %s", sector_num, strerror(-ret)); 1494 goto fail; 1495 } 1496 1497 sector_num += n; 1498 } 1499 1500 if (s->compressed) { 1501 /* signal EOF to align */ 1502 ret = blk_write_compressed(s->target, 0, NULL, 0); 1503 if (ret < 0) { 1504 goto fail; 1505 } 1506 } 1507 1508 ret = 0; 1509 fail: 1510 qemu_vfree(buf); 1511 return ret; 1512 } 1513 1514 static int img_convert(int argc, char **argv) 1515 { 1516 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1517 int64_t ret = 0; 1518 int progress = 0, flags, src_flags; 1519 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1520 BlockDriver *drv, *proto_drv; 1521 BlockBackend **blk = NULL, *out_blk = NULL; 1522 BlockDriverState **bs = NULL, *out_bs = NULL; 1523 int64_t total_sectors; 1524 int64_t *bs_sectors = NULL; 1525 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1526 BlockDriverInfo bdi; 1527 QemuOpts *opts = NULL; 1528 QemuOptsList *create_opts = NULL; 1529 const char *out_baseimg_param; 1530 char *options = NULL; 1531 const char *snapshot_name = NULL; 1532 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1533 bool quiet = false; 1534 Error *local_err = NULL; 1535 QemuOpts *sn_opts = NULL; 1536 ImgConvertState state; 1537 1538 fmt = NULL; 1539 out_fmt = "raw"; 1540 cache = "unsafe"; 1541 src_cache = BDRV_DEFAULT_CACHE; 1542 out_baseimg = NULL; 1543 compress = 0; 1544 skip_create = 0; 1545 for(;;) { 1546 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1547 if (c == -1) { 1548 break; 1549 } 1550 switch(c) { 1551 case '?': 1552 case 'h': 1553 help(); 1554 break; 1555 case 'f': 1556 fmt = optarg; 1557 break; 1558 case 'O': 1559 out_fmt = optarg; 1560 break; 1561 case 'B': 1562 out_baseimg = optarg; 1563 break; 1564 case 'c': 1565 compress = 1; 1566 break; 1567 case 'e': 1568 error_report("option -e is deprecated, please use \'-o " 1569 "encryption\' instead!"); 1570 ret = -1; 1571 goto fail_getopt; 1572 case '6': 1573 error_report("option -6 is deprecated, please use \'-o " 1574 "compat6\' instead!"); 1575 ret = -1; 1576 goto fail_getopt; 1577 case 'o': 1578 if (!is_valid_option_list(optarg)) { 1579 error_report("Invalid option list: %s", optarg); 1580 ret = -1; 1581 goto fail_getopt; 1582 } 1583 if (!options) { 1584 options = g_strdup(optarg); 1585 } else { 1586 char *old_options = options; 1587 options = g_strdup_printf("%s,%s", options, optarg); 1588 g_free(old_options); 1589 } 1590 break; 1591 case 's': 1592 snapshot_name = optarg; 1593 break; 1594 case 'l': 1595 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1596 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1597 optarg, false); 1598 if (!sn_opts) { 1599 error_report("Failed in parsing snapshot param '%s'", 1600 optarg); 1601 ret = -1; 1602 goto fail_getopt; 1603 } 1604 } else { 1605 snapshot_name = optarg; 1606 } 1607 break; 1608 case 'S': 1609 { 1610 int64_t sval; 1611 char *end; 1612 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 1613 if (sval < 0 || *end) { 1614 error_report("Invalid minimum zero buffer size for sparse output specified"); 1615 ret = -1; 1616 goto fail_getopt; 1617 } 1618 1619 min_sparse = sval / BDRV_SECTOR_SIZE; 1620 break; 1621 } 1622 case 'p': 1623 progress = 1; 1624 break; 1625 case 't': 1626 cache = optarg; 1627 break; 1628 case 'T': 1629 src_cache = optarg; 1630 break; 1631 case 'q': 1632 quiet = true; 1633 break; 1634 case 'n': 1635 skip_create = 1; 1636 break; 1637 } 1638 } 1639 1640 /* Initialize before goto out */ 1641 if (quiet) { 1642 progress = 0; 1643 } 1644 qemu_progress_init(progress, 1.0); 1645 1646 1647 bs_n = argc - optind - 1; 1648 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1649 1650 if (options && has_help_option(options)) { 1651 ret = print_block_option_help(out_filename, out_fmt); 1652 goto out; 1653 } 1654 1655 if (bs_n < 1) { 1656 error_exit("Must specify image file name"); 1657 } 1658 1659 1660 if (bs_n > 1 && out_baseimg) { 1661 error_report("-B makes no sense when concatenating multiple input " 1662 "images"); 1663 ret = -1; 1664 goto out; 1665 } 1666 1667 src_flags = BDRV_O_FLAGS; 1668 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1669 if (ret < 0) { 1670 error_report("Invalid source cache option: %s", src_cache); 1671 goto out; 1672 } 1673 1674 qemu_progress_print(0, 100); 1675 1676 blk = g_new0(BlockBackend *, bs_n); 1677 bs = g_new0(BlockDriverState *, bs_n); 1678 bs_sectors = g_new(int64_t, bs_n); 1679 1680 total_sectors = 0; 1681 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1682 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1683 : g_strdup("source"); 1684 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1685 true, quiet); 1686 g_free(id); 1687 if (!blk[bs_i]) { 1688 ret = -1; 1689 goto out; 1690 } 1691 bs[bs_i] = blk_bs(blk[bs_i]); 1692 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1693 if (bs_sectors[bs_i] < 0) { 1694 error_report("Could not get size of %s: %s", 1695 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1696 ret = -1; 1697 goto out; 1698 } 1699 total_sectors += bs_sectors[bs_i]; 1700 } 1701 1702 if (sn_opts) { 1703 ret = bdrv_snapshot_load_tmp(bs[0], 1704 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1705 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1706 &local_err); 1707 } else if (snapshot_name != NULL) { 1708 if (bs_n > 1) { 1709 error_report("No support for concatenating multiple snapshot"); 1710 ret = -1; 1711 goto out; 1712 } 1713 1714 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1715 } 1716 if (local_err) { 1717 error_report("Failed to load snapshot: %s", 1718 error_get_pretty(local_err)); 1719 error_free(local_err); 1720 ret = -1; 1721 goto out; 1722 } 1723 1724 /* Find driver and parse its options */ 1725 drv = bdrv_find_format(out_fmt); 1726 if (!drv) { 1727 error_report("Unknown file format '%s'", out_fmt); 1728 ret = -1; 1729 goto out; 1730 } 1731 1732 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1733 if (!proto_drv) { 1734 error_report_err(local_err); 1735 ret = -1; 1736 goto out; 1737 } 1738 1739 if (!skip_create) { 1740 if (!drv->create_opts) { 1741 error_report("Format driver '%s' does not support image creation", 1742 drv->format_name); 1743 ret = -1; 1744 goto out; 1745 } 1746 1747 if (!proto_drv->create_opts) { 1748 error_report("Protocol driver '%s' does not support image creation", 1749 proto_drv->format_name); 1750 ret = -1; 1751 goto out; 1752 } 1753 1754 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1755 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1756 1757 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1758 if (options) { 1759 qemu_opts_do_parse(opts, options, NULL, &local_err); 1760 if (local_err) { 1761 error_report_err(local_err); 1762 ret = -1; 1763 goto out; 1764 } 1765 } 1766 1767 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1768 &error_abort); 1769 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1770 if (ret < 0) { 1771 goto out; 1772 } 1773 } 1774 1775 /* Get backing file name if -o backing_file was used */ 1776 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1777 if (out_baseimg_param) { 1778 out_baseimg = out_baseimg_param; 1779 } 1780 1781 /* Check if compression is supported */ 1782 if (compress) { 1783 bool encryption = 1784 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1785 const char *preallocation = 1786 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1787 1788 if (!drv->bdrv_write_compressed) { 1789 error_report("Compression not supported for this file format"); 1790 ret = -1; 1791 goto out; 1792 } 1793 1794 if (encryption) { 1795 error_report("Compression and encryption not supported at " 1796 "the same time"); 1797 ret = -1; 1798 goto out; 1799 } 1800 1801 if (preallocation 1802 && strcmp(preallocation, "off")) 1803 { 1804 error_report("Compression and preallocation not supported at " 1805 "the same time"); 1806 ret = -1; 1807 goto out; 1808 } 1809 } 1810 1811 if (!skip_create) { 1812 /* Create the new image */ 1813 ret = bdrv_create(drv, out_filename, opts, &local_err); 1814 if (ret < 0) { 1815 error_report("%s: error while converting %s: %s", 1816 out_filename, out_fmt, error_get_pretty(local_err)); 1817 error_free(local_err); 1818 goto out; 1819 } 1820 } 1821 1822 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1823 ret = bdrv_parse_cache_flags(cache, &flags); 1824 if (ret < 0) { 1825 error_report("Invalid cache option: %s", cache); 1826 goto out; 1827 } 1828 1829 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1830 if (!out_blk) { 1831 ret = -1; 1832 goto out; 1833 } 1834 out_bs = blk_bs(out_blk); 1835 1836 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1837 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1838 * as maximum. */ 1839 bufsectors = MIN(32768, 1840 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1841 out_bs->bl.discard_alignment)) 1842 ); 1843 1844 if (skip_create) { 1845 int64_t output_sectors = blk_nb_sectors(out_blk); 1846 if (output_sectors < 0) { 1847 error_report("unable to get output image length: %s", 1848 strerror(-output_sectors)); 1849 ret = -1; 1850 goto out; 1851 } else if (output_sectors < total_sectors) { 1852 error_report("output file is smaller than input file"); 1853 ret = -1; 1854 goto out; 1855 } 1856 } 1857 1858 cluster_sectors = 0; 1859 ret = bdrv_get_info(out_bs, &bdi); 1860 if (ret < 0) { 1861 if (compress) { 1862 error_report("could not get block driver info"); 1863 goto out; 1864 } 1865 } else { 1866 compress = compress || bdi.needs_compressed_writes; 1867 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1868 } 1869 1870 state = (ImgConvertState) { 1871 .src = blk, 1872 .src_sectors = bs_sectors, 1873 .src_num = bs_n, 1874 .total_sectors = total_sectors, 1875 .target = out_blk, 1876 .compressed = compress, 1877 .target_has_backing = (bool) out_baseimg, 1878 .min_sparse = min_sparse, 1879 .cluster_sectors = cluster_sectors, 1880 .buf_sectors = bufsectors, 1881 }; 1882 ret = convert_do_copy(&state); 1883 1884 out: 1885 if (!ret) { 1886 qemu_progress_print(100, 0); 1887 } 1888 qemu_progress_end(); 1889 qemu_opts_del(opts); 1890 qemu_opts_free(create_opts); 1891 qemu_opts_del(sn_opts); 1892 blk_unref(out_blk); 1893 g_free(bs); 1894 if (blk) { 1895 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1896 blk_unref(blk[bs_i]); 1897 } 1898 g_free(blk); 1899 } 1900 g_free(bs_sectors); 1901 fail_getopt: 1902 g_free(options); 1903 1904 if (ret) { 1905 return 1; 1906 } 1907 return 0; 1908 } 1909 1910 1911 static void dump_snapshots(BlockDriverState *bs) 1912 { 1913 QEMUSnapshotInfo *sn_tab, *sn; 1914 int nb_sns, i; 1915 1916 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1917 if (nb_sns <= 0) 1918 return; 1919 printf("Snapshot list:\n"); 1920 bdrv_snapshot_dump(fprintf, stdout, NULL); 1921 printf("\n"); 1922 for(i = 0; i < nb_sns; i++) { 1923 sn = &sn_tab[i]; 1924 bdrv_snapshot_dump(fprintf, stdout, sn); 1925 printf("\n"); 1926 } 1927 g_free(sn_tab); 1928 } 1929 1930 static void dump_json_image_info_list(ImageInfoList *list) 1931 { 1932 Error *local_err = NULL; 1933 QString *str; 1934 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1935 QObject *obj; 1936 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1937 &list, NULL, &local_err); 1938 obj = qmp_output_get_qobject(ov); 1939 str = qobject_to_json_pretty(obj); 1940 assert(str != NULL); 1941 printf("%s\n", qstring_get_str(str)); 1942 qobject_decref(obj); 1943 qmp_output_visitor_cleanup(ov); 1944 QDECREF(str); 1945 } 1946 1947 static void dump_json_image_info(ImageInfo *info) 1948 { 1949 Error *local_err = NULL; 1950 QString *str; 1951 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1952 QObject *obj; 1953 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1954 &info, NULL, &local_err); 1955 obj = qmp_output_get_qobject(ov); 1956 str = qobject_to_json_pretty(obj); 1957 assert(str != NULL); 1958 printf("%s\n", qstring_get_str(str)); 1959 qobject_decref(obj); 1960 qmp_output_visitor_cleanup(ov); 1961 QDECREF(str); 1962 } 1963 1964 static void dump_human_image_info_list(ImageInfoList *list) 1965 { 1966 ImageInfoList *elem; 1967 bool delim = false; 1968 1969 for (elem = list; elem; elem = elem->next) { 1970 if (delim) { 1971 printf("\n"); 1972 } 1973 delim = true; 1974 1975 bdrv_image_info_dump(fprintf, stdout, elem->value); 1976 } 1977 } 1978 1979 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1980 { 1981 return strcmp(a, b) == 0; 1982 } 1983 1984 /** 1985 * Open an image file chain and return an ImageInfoList 1986 * 1987 * @filename: topmost image filename 1988 * @fmt: topmost image format (may be NULL to autodetect) 1989 * @chain: true - enumerate entire backing file chain 1990 * false - only topmost image file 1991 * 1992 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1993 * image file. If there was an error a message will have been printed to 1994 * stderr. 1995 */ 1996 static ImageInfoList *collect_image_info_list(const char *filename, 1997 const char *fmt, 1998 bool chain) 1999 { 2000 ImageInfoList *head = NULL; 2001 ImageInfoList **last = &head; 2002 GHashTable *filenames; 2003 Error *err = NULL; 2004 2005 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2006 2007 while (filename) { 2008 BlockBackend *blk; 2009 BlockDriverState *bs; 2010 ImageInfo *info; 2011 ImageInfoList *elem; 2012 2013 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2014 error_report("Backing file '%s' creates an infinite loop.", 2015 filename); 2016 goto err; 2017 } 2018 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2019 2020 blk = img_open("image", filename, fmt, 2021 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2022 if (!blk) { 2023 goto err; 2024 } 2025 bs = blk_bs(blk); 2026 2027 bdrv_query_image_info(bs, &info, &err); 2028 if (err) { 2029 error_report_err(err); 2030 blk_unref(blk); 2031 goto err; 2032 } 2033 2034 elem = g_new0(ImageInfoList, 1); 2035 elem->value = info; 2036 *last = elem; 2037 last = &elem->next; 2038 2039 blk_unref(blk); 2040 2041 filename = fmt = NULL; 2042 if (chain) { 2043 if (info->has_full_backing_filename) { 2044 filename = info->full_backing_filename; 2045 } else if (info->has_backing_filename) { 2046 filename = info->backing_filename; 2047 } 2048 if (info->has_backing_filename_format) { 2049 fmt = info->backing_filename_format; 2050 } 2051 } 2052 } 2053 g_hash_table_destroy(filenames); 2054 return head; 2055 2056 err: 2057 qapi_free_ImageInfoList(head); 2058 g_hash_table_destroy(filenames); 2059 return NULL; 2060 } 2061 2062 static int img_info(int argc, char **argv) 2063 { 2064 int c; 2065 OutputFormat output_format = OFORMAT_HUMAN; 2066 bool chain = false; 2067 const char *filename, *fmt, *output; 2068 ImageInfoList *list; 2069 2070 fmt = NULL; 2071 output = NULL; 2072 for(;;) { 2073 int option_index = 0; 2074 static const struct option long_options[] = { 2075 {"help", no_argument, 0, 'h'}, 2076 {"format", required_argument, 0, 'f'}, 2077 {"output", required_argument, 0, OPTION_OUTPUT}, 2078 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2079 {0, 0, 0, 0} 2080 }; 2081 c = getopt_long(argc, argv, "f:h", 2082 long_options, &option_index); 2083 if (c == -1) { 2084 break; 2085 } 2086 switch(c) { 2087 case '?': 2088 case 'h': 2089 help(); 2090 break; 2091 case 'f': 2092 fmt = optarg; 2093 break; 2094 case OPTION_OUTPUT: 2095 output = optarg; 2096 break; 2097 case OPTION_BACKING_CHAIN: 2098 chain = true; 2099 break; 2100 } 2101 } 2102 if (optind != argc - 1) { 2103 error_exit("Expecting one image file name"); 2104 } 2105 filename = argv[optind++]; 2106 2107 if (output && !strcmp(output, "json")) { 2108 output_format = OFORMAT_JSON; 2109 } else if (output && !strcmp(output, "human")) { 2110 output_format = OFORMAT_HUMAN; 2111 } else if (output) { 2112 error_report("--output must be used with human or json as argument."); 2113 return 1; 2114 } 2115 2116 list = collect_image_info_list(filename, fmt, chain); 2117 if (!list) { 2118 return 1; 2119 } 2120 2121 switch (output_format) { 2122 case OFORMAT_HUMAN: 2123 dump_human_image_info_list(list); 2124 break; 2125 case OFORMAT_JSON: 2126 if (chain) { 2127 dump_json_image_info_list(list); 2128 } else { 2129 dump_json_image_info(list->value); 2130 } 2131 break; 2132 } 2133 2134 qapi_free_ImageInfoList(list); 2135 return 0; 2136 } 2137 2138 2139 typedef struct MapEntry { 2140 int flags; 2141 int depth; 2142 int64_t start; 2143 int64_t length; 2144 int64_t offset; 2145 BlockDriverState *bs; 2146 } MapEntry; 2147 2148 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2149 MapEntry *next) 2150 { 2151 switch (output_format) { 2152 case OFORMAT_HUMAN: 2153 if ((e->flags & BDRV_BLOCK_DATA) && 2154 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2155 error_report("File contains external, encrypted or compressed clusters."); 2156 exit(1); 2157 } 2158 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2159 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2160 e->start, e->length, e->offset, e->bs->filename); 2161 } 2162 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2163 * Modify the flags here to allow more coalescing. 2164 */ 2165 if (next && 2166 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2167 next->flags &= ~BDRV_BLOCK_DATA; 2168 next->flags |= BDRV_BLOCK_ZERO; 2169 } 2170 break; 2171 case OFORMAT_JSON: 2172 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2173 " \"zero\": %s, \"data\": %s", 2174 (e->start == 0 ? "[" : ",\n"), 2175 e->start, e->length, e->depth, 2176 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2177 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2178 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2179 printf(", \"offset\": %"PRId64"", e->offset); 2180 } 2181 putchar('}'); 2182 2183 if (!next) { 2184 printf("]\n"); 2185 } 2186 break; 2187 } 2188 } 2189 2190 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2191 int nb_sectors, MapEntry *e) 2192 { 2193 int64_t ret; 2194 int depth; 2195 2196 /* As an optimization, we could cache the current range of unallocated 2197 * clusters in each file of the chain, and avoid querying the same 2198 * range repeatedly. 2199 */ 2200 2201 depth = 0; 2202 for (;;) { 2203 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2204 if (ret < 0) { 2205 return ret; 2206 } 2207 assert(nb_sectors); 2208 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2209 break; 2210 } 2211 bs = backing_bs(bs); 2212 if (bs == NULL) { 2213 ret = 0; 2214 break; 2215 } 2216 2217 depth++; 2218 } 2219 2220 e->start = sector_num * BDRV_SECTOR_SIZE; 2221 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2222 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2223 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2224 e->depth = depth; 2225 e->bs = bs; 2226 return 0; 2227 } 2228 2229 static int img_map(int argc, char **argv) 2230 { 2231 int c; 2232 OutputFormat output_format = OFORMAT_HUMAN; 2233 BlockBackend *blk; 2234 BlockDriverState *bs; 2235 const char *filename, *fmt, *output; 2236 int64_t length; 2237 MapEntry curr = { .length = 0 }, next; 2238 int ret = 0; 2239 2240 fmt = NULL; 2241 output = NULL; 2242 for (;;) { 2243 int option_index = 0; 2244 static const struct option long_options[] = { 2245 {"help", no_argument, 0, 'h'}, 2246 {"format", required_argument, 0, 'f'}, 2247 {"output", required_argument, 0, OPTION_OUTPUT}, 2248 {0, 0, 0, 0} 2249 }; 2250 c = getopt_long(argc, argv, "f:h", 2251 long_options, &option_index); 2252 if (c == -1) { 2253 break; 2254 } 2255 switch (c) { 2256 case '?': 2257 case 'h': 2258 help(); 2259 break; 2260 case 'f': 2261 fmt = optarg; 2262 break; 2263 case OPTION_OUTPUT: 2264 output = optarg; 2265 break; 2266 } 2267 } 2268 if (optind != argc - 1) { 2269 error_exit("Expecting one image file name"); 2270 } 2271 filename = argv[optind]; 2272 2273 if (output && !strcmp(output, "json")) { 2274 output_format = OFORMAT_JSON; 2275 } else if (output && !strcmp(output, "human")) { 2276 output_format = OFORMAT_HUMAN; 2277 } else if (output) { 2278 error_report("--output must be used with human or json as argument."); 2279 return 1; 2280 } 2281 2282 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2283 if (!blk) { 2284 return 1; 2285 } 2286 bs = blk_bs(blk); 2287 2288 if (output_format == OFORMAT_HUMAN) { 2289 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2290 } 2291 2292 length = blk_getlength(blk); 2293 while (curr.start + curr.length < length) { 2294 int64_t nsectors_left; 2295 int64_t sector_num; 2296 int n; 2297 2298 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2299 2300 /* Probe up to 1 GiB at a time. */ 2301 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2302 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2303 ret = get_block_status(bs, sector_num, n, &next); 2304 2305 if (ret < 0) { 2306 error_report("Could not read file metadata: %s", strerror(-ret)); 2307 goto out; 2308 } 2309 2310 if (curr.length != 0 && curr.flags == next.flags && 2311 curr.depth == next.depth && 2312 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2313 curr.offset + curr.length == next.offset)) { 2314 curr.length += next.length; 2315 continue; 2316 } 2317 2318 if (curr.length > 0) { 2319 dump_map_entry(output_format, &curr, &next); 2320 } 2321 curr = next; 2322 } 2323 2324 dump_map_entry(output_format, &curr, NULL); 2325 2326 out: 2327 blk_unref(blk); 2328 return ret < 0; 2329 } 2330 2331 #define SNAPSHOT_LIST 1 2332 #define SNAPSHOT_CREATE 2 2333 #define SNAPSHOT_APPLY 3 2334 #define SNAPSHOT_DELETE 4 2335 2336 static int img_snapshot(int argc, char **argv) 2337 { 2338 BlockBackend *blk; 2339 BlockDriverState *bs; 2340 QEMUSnapshotInfo sn; 2341 char *filename, *snapshot_name = NULL; 2342 int c, ret = 0, bdrv_oflags; 2343 int action = 0; 2344 qemu_timeval tv; 2345 bool quiet = false; 2346 Error *err = NULL; 2347 2348 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2349 /* Parse commandline parameters */ 2350 for(;;) { 2351 c = getopt(argc, argv, "la:c:d:hq"); 2352 if (c == -1) { 2353 break; 2354 } 2355 switch(c) { 2356 case '?': 2357 case 'h': 2358 help(); 2359 return 0; 2360 case 'l': 2361 if (action) { 2362 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2363 return 0; 2364 } 2365 action = SNAPSHOT_LIST; 2366 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2367 break; 2368 case 'a': 2369 if (action) { 2370 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2371 return 0; 2372 } 2373 action = SNAPSHOT_APPLY; 2374 snapshot_name = optarg; 2375 break; 2376 case 'c': 2377 if (action) { 2378 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2379 return 0; 2380 } 2381 action = SNAPSHOT_CREATE; 2382 snapshot_name = optarg; 2383 break; 2384 case 'd': 2385 if (action) { 2386 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2387 return 0; 2388 } 2389 action = SNAPSHOT_DELETE; 2390 snapshot_name = optarg; 2391 break; 2392 case 'q': 2393 quiet = true; 2394 break; 2395 } 2396 } 2397 2398 if (optind != argc - 1) { 2399 error_exit("Expecting one image file name"); 2400 } 2401 filename = argv[optind++]; 2402 2403 /* Open the image */ 2404 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2405 if (!blk) { 2406 return 1; 2407 } 2408 bs = blk_bs(blk); 2409 2410 /* Perform the requested action */ 2411 switch(action) { 2412 case SNAPSHOT_LIST: 2413 dump_snapshots(bs); 2414 break; 2415 2416 case SNAPSHOT_CREATE: 2417 memset(&sn, 0, sizeof(sn)); 2418 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2419 2420 qemu_gettimeofday(&tv); 2421 sn.date_sec = tv.tv_sec; 2422 sn.date_nsec = tv.tv_usec * 1000; 2423 2424 ret = bdrv_snapshot_create(bs, &sn); 2425 if (ret) { 2426 error_report("Could not create snapshot '%s': %d (%s)", 2427 snapshot_name, ret, strerror(-ret)); 2428 } 2429 break; 2430 2431 case SNAPSHOT_APPLY: 2432 ret = bdrv_snapshot_goto(bs, snapshot_name); 2433 if (ret) { 2434 error_report("Could not apply snapshot '%s': %d (%s)", 2435 snapshot_name, ret, strerror(-ret)); 2436 } 2437 break; 2438 2439 case SNAPSHOT_DELETE: 2440 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2441 if (err) { 2442 error_report("Could not delete snapshot '%s': (%s)", 2443 snapshot_name, error_get_pretty(err)); 2444 error_free(err); 2445 ret = 1; 2446 } 2447 break; 2448 } 2449 2450 /* Cleanup */ 2451 blk_unref(blk); 2452 if (ret) { 2453 return 1; 2454 } 2455 return 0; 2456 } 2457 2458 static int img_rebase(int argc, char **argv) 2459 { 2460 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2461 BlockDriverState *bs = NULL; 2462 char *filename; 2463 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2464 int c, flags, src_flags, ret; 2465 int unsafe = 0; 2466 int progress = 0; 2467 bool quiet = false; 2468 Error *local_err = NULL; 2469 2470 /* Parse commandline parameters */ 2471 fmt = NULL; 2472 cache = BDRV_DEFAULT_CACHE; 2473 src_cache = BDRV_DEFAULT_CACHE; 2474 out_baseimg = NULL; 2475 out_basefmt = NULL; 2476 for(;;) { 2477 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2478 if (c == -1) { 2479 break; 2480 } 2481 switch(c) { 2482 case '?': 2483 case 'h': 2484 help(); 2485 return 0; 2486 case 'f': 2487 fmt = optarg; 2488 break; 2489 case 'F': 2490 out_basefmt = optarg; 2491 break; 2492 case 'b': 2493 out_baseimg = optarg; 2494 break; 2495 case 'u': 2496 unsafe = 1; 2497 break; 2498 case 'p': 2499 progress = 1; 2500 break; 2501 case 't': 2502 cache = optarg; 2503 break; 2504 case 'T': 2505 src_cache = optarg; 2506 break; 2507 case 'q': 2508 quiet = true; 2509 break; 2510 } 2511 } 2512 2513 if (quiet) { 2514 progress = 0; 2515 } 2516 2517 if (optind != argc - 1) { 2518 error_exit("Expecting one image file name"); 2519 } 2520 if (!unsafe && !out_baseimg) { 2521 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2522 } 2523 filename = argv[optind++]; 2524 2525 qemu_progress_init(progress, 2.0); 2526 qemu_progress_print(0, 100); 2527 2528 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2529 ret = bdrv_parse_cache_flags(cache, &flags); 2530 if (ret < 0) { 2531 error_report("Invalid cache option: %s", cache); 2532 goto out; 2533 } 2534 2535 src_flags = BDRV_O_FLAGS; 2536 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2537 if (ret < 0) { 2538 error_report("Invalid source cache option: %s", src_cache); 2539 goto out; 2540 } 2541 2542 /* 2543 * Open the images. 2544 * 2545 * Ignore the old backing file for unsafe rebase in case we want to correct 2546 * the reference to a renamed or moved backing file. 2547 */ 2548 blk = img_open("image", filename, fmt, flags, true, quiet); 2549 if (!blk) { 2550 ret = -1; 2551 goto out; 2552 } 2553 bs = blk_bs(blk); 2554 2555 if (out_basefmt != NULL) { 2556 if (bdrv_find_format(out_basefmt) == NULL) { 2557 error_report("Invalid format name: '%s'", out_basefmt); 2558 ret = -1; 2559 goto out; 2560 } 2561 } 2562 2563 /* For safe rebasing we need to compare old and new backing file */ 2564 if (!unsafe) { 2565 char backing_name[PATH_MAX]; 2566 QDict *options = NULL; 2567 2568 if (bs->backing_format[0] != '\0') { 2569 options = qdict_new(); 2570 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2571 } 2572 2573 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2574 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2575 options, src_flags, &local_err); 2576 if (!blk_old_backing) { 2577 error_report("Could not open old backing file '%s': %s", 2578 backing_name, error_get_pretty(local_err)); 2579 error_free(local_err); 2580 goto out; 2581 } 2582 2583 if (out_baseimg[0]) { 2584 if (out_basefmt) { 2585 options = qdict_new(); 2586 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2587 } else { 2588 options = NULL; 2589 } 2590 2591 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2592 options, src_flags, &local_err); 2593 if (!blk_new_backing) { 2594 error_report("Could not open new backing file '%s': %s", 2595 out_baseimg, error_get_pretty(local_err)); 2596 error_free(local_err); 2597 goto out; 2598 } 2599 } 2600 } 2601 2602 /* 2603 * Check each unallocated cluster in the COW file. If it is unallocated, 2604 * accesses go to the backing file. We must therefore compare this cluster 2605 * in the old and new backing file, and if they differ we need to copy it 2606 * from the old backing file into the COW file. 2607 * 2608 * If qemu-img crashes during this step, no harm is done. The content of 2609 * the image is the same as the original one at any time. 2610 */ 2611 if (!unsafe) { 2612 int64_t num_sectors; 2613 int64_t old_backing_num_sectors; 2614 int64_t new_backing_num_sectors = 0; 2615 uint64_t sector; 2616 int n; 2617 uint8_t * buf_old; 2618 uint8_t * buf_new; 2619 float local_progress = 0; 2620 2621 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2622 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2623 2624 num_sectors = blk_nb_sectors(blk); 2625 if (num_sectors < 0) { 2626 error_report("Could not get size of '%s': %s", 2627 filename, strerror(-num_sectors)); 2628 ret = -1; 2629 goto out; 2630 } 2631 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2632 if (old_backing_num_sectors < 0) { 2633 char backing_name[PATH_MAX]; 2634 2635 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2636 error_report("Could not get size of '%s': %s", 2637 backing_name, strerror(-old_backing_num_sectors)); 2638 ret = -1; 2639 goto out; 2640 } 2641 if (blk_new_backing) { 2642 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2643 if (new_backing_num_sectors < 0) { 2644 error_report("Could not get size of '%s': %s", 2645 out_baseimg, strerror(-new_backing_num_sectors)); 2646 ret = -1; 2647 goto out; 2648 } 2649 } 2650 2651 if (num_sectors != 0) { 2652 local_progress = (float)100 / 2653 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2654 } 2655 2656 for (sector = 0; sector < num_sectors; sector += n) { 2657 2658 /* How many sectors can we handle with the next read? */ 2659 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2660 n = (IO_BUF_SIZE / 512); 2661 } else { 2662 n = num_sectors - sector; 2663 } 2664 2665 /* If the cluster is allocated, we don't need to take action */ 2666 ret = bdrv_is_allocated(bs, sector, n, &n); 2667 if (ret < 0) { 2668 error_report("error while reading image metadata: %s", 2669 strerror(-ret)); 2670 goto out; 2671 } 2672 if (ret) { 2673 continue; 2674 } 2675 2676 /* 2677 * Read old and new backing file and take into consideration that 2678 * backing files may be smaller than the COW image. 2679 */ 2680 if (sector >= old_backing_num_sectors) { 2681 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2682 } else { 2683 if (sector + n > old_backing_num_sectors) { 2684 n = old_backing_num_sectors - sector; 2685 } 2686 2687 ret = blk_read(blk_old_backing, sector, buf_old, n); 2688 if (ret < 0) { 2689 error_report("error while reading from old backing file"); 2690 goto out; 2691 } 2692 } 2693 2694 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2695 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2696 } else { 2697 if (sector + n > new_backing_num_sectors) { 2698 n = new_backing_num_sectors - sector; 2699 } 2700 2701 ret = blk_read(blk_new_backing, sector, buf_new, n); 2702 if (ret < 0) { 2703 error_report("error while reading from new backing file"); 2704 goto out; 2705 } 2706 } 2707 2708 /* If they differ, we need to write to the COW file */ 2709 uint64_t written = 0; 2710 2711 while (written < n) { 2712 int pnum; 2713 2714 if (compare_sectors(buf_old + written * 512, 2715 buf_new + written * 512, n - written, &pnum)) 2716 { 2717 ret = blk_write(blk, sector + written, 2718 buf_old + written * 512, pnum); 2719 if (ret < 0) { 2720 error_report("Error while writing to COW image: %s", 2721 strerror(-ret)); 2722 goto out; 2723 } 2724 } 2725 2726 written += pnum; 2727 } 2728 qemu_progress_print(local_progress, 100); 2729 } 2730 2731 qemu_vfree(buf_old); 2732 qemu_vfree(buf_new); 2733 } 2734 2735 /* 2736 * Change the backing file. All clusters that are different from the old 2737 * backing file are overwritten in the COW file now, so the visible content 2738 * doesn't change when we switch the backing file. 2739 */ 2740 if (out_baseimg && *out_baseimg) { 2741 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2742 } else { 2743 ret = bdrv_change_backing_file(bs, NULL, NULL); 2744 } 2745 2746 if (ret == -ENOSPC) { 2747 error_report("Could not change the backing file to '%s': No " 2748 "space left in the file header", out_baseimg); 2749 } else if (ret < 0) { 2750 error_report("Could not change the backing file to '%s': %s", 2751 out_baseimg, strerror(-ret)); 2752 } 2753 2754 qemu_progress_print(100, 0); 2755 /* 2756 * TODO At this point it is possible to check if any clusters that are 2757 * allocated in the COW file are the same in the backing file. If so, they 2758 * could be dropped from the COW file. Don't do this before switching the 2759 * backing file, in case of a crash this would lead to corruption. 2760 */ 2761 out: 2762 qemu_progress_end(); 2763 /* Cleanup */ 2764 if (!unsafe) { 2765 blk_unref(blk_old_backing); 2766 blk_unref(blk_new_backing); 2767 } 2768 2769 blk_unref(blk); 2770 if (ret) { 2771 return 1; 2772 } 2773 return 0; 2774 } 2775 2776 static int img_resize(int argc, char **argv) 2777 { 2778 Error *err = NULL; 2779 int c, ret, relative; 2780 const char *filename, *fmt, *size; 2781 int64_t n, total_size; 2782 bool quiet = false; 2783 BlockBackend *blk = NULL; 2784 QemuOpts *param; 2785 static QemuOptsList resize_options = { 2786 .name = "resize_options", 2787 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2788 .desc = { 2789 { 2790 .name = BLOCK_OPT_SIZE, 2791 .type = QEMU_OPT_SIZE, 2792 .help = "Virtual disk size" 2793 }, { 2794 /* end of list */ 2795 } 2796 }, 2797 }; 2798 2799 /* Remove size from argv manually so that negative numbers are not treated 2800 * as options by getopt. */ 2801 if (argc < 3) { 2802 error_exit("Not enough arguments"); 2803 return 1; 2804 } 2805 2806 size = argv[--argc]; 2807 2808 /* Parse getopt arguments */ 2809 fmt = NULL; 2810 for(;;) { 2811 c = getopt(argc, argv, "f:hq"); 2812 if (c == -1) { 2813 break; 2814 } 2815 switch(c) { 2816 case '?': 2817 case 'h': 2818 help(); 2819 break; 2820 case 'f': 2821 fmt = optarg; 2822 break; 2823 case 'q': 2824 quiet = true; 2825 break; 2826 } 2827 } 2828 if (optind != argc - 1) { 2829 error_exit("Expecting one image file name"); 2830 } 2831 filename = argv[optind++]; 2832 2833 /* Choose grow, shrink, or absolute resize mode */ 2834 switch (size[0]) { 2835 case '+': 2836 relative = 1; 2837 size++; 2838 break; 2839 case '-': 2840 relative = -1; 2841 size++; 2842 break; 2843 default: 2844 relative = 0; 2845 break; 2846 } 2847 2848 /* Parse size */ 2849 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2850 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2851 if (err) { 2852 error_report_err(err); 2853 ret = -1; 2854 qemu_opts_del(param); 2855 goto out; 2856 } 2857 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2858 qemu_opts_del(param); 2859 2860 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2861 true, quiet); 2862 if (!blk) { 2863 ret = -1; 2864 goto out; 2865 } 2866 2867 if (relative) { 2868 total_size = blk_getlength(blk) + n * relative; 2869 } else { 2870 total_size = n; 2871 } 2872 if (total_size <= 0) { 2873 error_report("New image size must be positive"); 2874 ret = -1; 2875 goto out; 2876 } 2877 2878 ret = blk_truncate(blk, total_size); 2879 switch (ret) { 2880 case 0: 2881 qprintf(quiet, "Image resized.\n"); 2882 break; 2883 case -ENOTSUP: 2884 error_report("This image does not support resize"); 2885 break; 2886 case -EACCES: 2887 error_report("Image is read-only"); 2888 break; 2889 default: 2890 error_report("Error resizing image (%d)", -ret); 2891 break; 2892 } 2893 out: 2894 blk_unref(blk); 2895 if (ret) { 2896 return 1; 2897 } 2898 return 0; 2899 } 2900 2901 static void amend_status_cb(BlockDriverState *bs, 2902 int64_t offset, int64_t total_work_size) 2903 { 2904 qemu_progress_print(100.f * offset / total_work_size, 0); 2905 } 2906 2907 static int img_amend(int argc, char **argv) 2908 { 2909 Error *err = NULL; 2910 int c, ret = 0; 2911 char *options = NULL; 2912 QemuOptsList *create_opts = NULL; 2913 QemuOpts *opts = NULL; 2914 const char *fmt = NULL, *filename, *cache; 2915 int flags; 2916 bool quiet = false, progress = false; 2917 BlockBackend *blk = NULL; 2918 BlockDriverState *bs = NULL; 2919 2920 cache = BDRV_DEFAULT_CACHE; 2921 for (;;) { 2922 c = getopt(argc, argv, "ho:f:t:pq"); 2923 if (c == -1) { 2924 break; 2925 } 2926 2927 switch (c) { 2928 case 'h': 2929 case '?': 2930 help(); 2931 break; 2932 case 'o': 2933 if (!is_valid_option_list(optarg)) { 2934 error_report("Invalid option list: %s", optarg); 2935 ret = -1; 2936 goto out_no_progress; 2937 } 2938 if (!options) { 2939 options = g_strdup(optarg); 2940 } else { 2941 char *old_options = options; 2942 options = g_strdup_printf("%s,%s", options, optarg); 2943 g_free(old_options); 2944 } 2945 break; 2946 case 'f': 2947 fmt = optarg; 2948 break; 2949 case 't': 2950 cache = optarg; 2951 break; 2952 case 'p': 2953 progress = true; 2954 break; 2955 case 'q': 2956 quiet = true; 2957 break; 2958 } 2959 } 2960 2961 if (!options) { 2962 error_exit("Must specify options (-o)"); 2963 } 2964 2965 if (quiet) { 2966 progress = false; 2967 } 2968 qemu_progress_init(progress, 1.0); 2969 2970 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2971 if (fmt && has_help_option(options)) { 2972 /* If a format is explicitly specified (and possibly no filename is 2973 * given), print option help here */ 2974 ret = print_block_option_help(filename, fmt); 2975 goto out; 2976 } 2977 2978 if (optind != argc - 1) { 2979 error_report("Expecting one image file name"); 2980 ret = -1; 2981 goto out; 2982 } 2983 2984 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2985 ret = bdrv_parse_cache_flags(cache, &flags); 2986 if (ret < 0) { 2987 error_report("Invalid cache option: %s", cache); 2988 goto out; 2989 } 2990 2991 blk = img_open("image", filename, fmt, flags, true, quiet); 2992 if (!blk) { 2993 ret = -1; 2994 goto out; 2995 } 2996 bs = blk_bs(blk); 2997 2998 fmt = bs->drv->format_name; 2999 3000 if (has_help_option(options)) { 3001 /* If the format was auto-detected, print option help here */ 3002 ret = print_block_option_help(filename, fmt); 3003 goto out; 3004 } 3005 3006 if (!bs->drv->create_opts) { 3007 error_report("Format driver '%s' does not support any options to amend", 3008 fmt); 3009 ret = -1; 3010 goto out; 3011 } 3012 3013 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3014 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3015 if (options) { 3016 qemu_opts_do_parse(opts, options, NULL, &err); 3017 if (err) { 3018 error_report_err(err); 3019 ret = -1; 3020 goto out; 3021 } 3022 } 3023 3024 /* In case the driver does not call amend_status_cb() */ 3025 qemu_progress_print(0.f, 0); 3026 ret = bdrv_amend_options(bs, opts, &amend_status_cb); 3027 qemu_progress_print(100.f, 0); 3028 if (ret < 0) { 3029 error_report("Error while amending options: %s", strerror(-ret)); 3030 goto out; 3031 } 3032 3033 out: 3034 qemu_progress_end(); 3035 3036 out_no_progress: 3037 blk_unref(blk); 3038 qemu_opts_del(opts); 3039 qemu_opts_free(create_opts); 3040 g_free(options); 3041 3042 if (ret) { 3043 return 1; 3044 } 3045 return 0; 3046 } 3047 3048 static const img_cmd_t img_cmds[] = { 3049 #define DEF(option, callback, arg_string) \ 3050 { option, callback }, 3051 #include "qemu-img-cmds.h" 3052 #undef DEF 3053 #undef GEN_DOCS 3054 { NULL, NULL, }, 3055 }; 3056 3057 int main(int argc, char **argv) 3058 { 3059 const img_cmd_t *cmd; 3060 const char *cmdname; 3061 Error *local_error = NULL; 3062 int c; 3063 static const struct option long_options[] = { 3064 {"help", no_argument, 0, 'h'}, 3065 {"version", no_argument, 0, 'v'}, 3066 {0, 0, 0, 0} 3067 }; 3068 3069 #ifdef CONFIG_POSIX 3070 signal(SIGPIPE, SIG_IGN); 3071 #endif 3072 3073 error_set_progname(argv[0]); 3074 qemu_init_exec_dir(argv[0]); 3075 3076 if (qemu_init_main_loop(&local_error)) { 3077 error_report_err(local_error); 3078 exit(EXIT_FAILURE); 3079 } 3080 3081 bdrv_init(); 3082 if (argc < 2) { 3083 error_exit("Not enough arguments"); 3084 } 3085 cmdname = argv[1]; 3086 3087 /* find the command */ 3088 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3089 if (!strcmp(cmdname, cmd->name)) { 3090 return cmd->handler(argc - 1, argv + 1); 3091 } 3092 } 3093 3094 c = getopt_long(argc, argv, "h", long_options, NULL); 3095 3096 if (c == 'h') { 3097 help(); 3098 } 3099 if (c == 'v') { 3100 printf(QEMU_IMG_VERSION); 3101 return 0; 3102 } 3103 3104 /* not found */ 3105 error_exit("Command not found: %s", cmdname); 3106 } 3107