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