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 "qemu/osdep.h" 25 #include "qapi-visit.h" 26 #include "qapi/qmp-output-visitor.h" 27 #include "qapi/qmp/qerror.h" 28 #include "qapi/qmp/qjson.h" 29 #include "qemu-common.h" 30 #include "qemu/option.h" 31 #include "qemu/error-report.h" 32 #include "sysemu/sysemu.h" 33 #include "sysemu/block-backend.h" 34 #include "block/block_int.h" 35 #include "block/blockjob.h" 36 #include "block/qapi.h" 37 #include <getopt.h> 38 39 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 40 ", Copyright (c) 2004-2008 Fabrice Bellard\n" 41 42 typedef struct img_cmd_t { 43 const char *name; 44 int (*handler)(int argc, char **argv); 45 } img_cmd_t; 46 47 enum { 48 OPTION_OUTPUT = 256, 49 OPTION_BACKING_CHAIN = 257, 50 }; 51 52 typedef enum OutputFormat { 53 OFORMAT_JSON, 54 OFORMAT_HUMAN, 55 } OutputFormat; 56 57 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ 58 #define BDRV_O_FLAGS BDRV_O_CACHE_WB 59 #define BDRV_DEFAULT_CACHE "writeback" 60 61 static void format_print(void *opaque, const char *name) 62 { 63 printf(" %s", name); 64 } 65 66 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 67 { 68 va_list ap; 69 70 error_printf("qemu-img: "); 71 72 va_start(ap, fmt); 73 error_vprintf(fmt, ap); 74 va_end(ap); 75 76 error_printf("\nTry 'qemu-img --help' for more information\n"); 77 exit(EXIT_FAILURE); 78 } 79 80 /* Please keep in synch with qemu-img.texi */ 81 static void QEMU_NORETURN help(void) 82 { 83 const char *help_msg = 84 QEMU_IMG_VERSION 85 "usage: qemu-img command [command options]\n" 86 "QEMU disk image utility\n" 87 "\n" 88 "Command syntax:\n" 89 #define DEF(option, callback, arg_string) \ 90 " " arg_string "\n" 91 #include "qemu-img-cmds.h" 92 #undef DEF 93 #undef GEN_DOCS 94 "\n" 95 "Command parameters:\n" 96 " 'filename' is a disk image filename\n" 97 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 98 " 'cache' is the cache mode used to write the output disk image, the valid\n" 99 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 100 " 'directsync' and 'unsafe' (default for convert)\n" 101 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 102 " options are the same as for the 'cache' option\n" 103 " 'size' is the disk image size in bytes. Optional suffixes\n" 104 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 105 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 106 " supported. 'b' is ignored.\n" 107 " 'output_filename' is the destination disk image filename\n" 108 " 'output_fmt' is the destination format\n" 109 " 'options' is a comma separated list of format specific options in a\n" 110 " name=value format. Use -o ? for an overview of the options supported by the\n" 111 " used format\n" 112 " 'snapshot_param' is param used for internal snapshot, format\n" 113 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 114 " '[ID_OR_NAME]'\n" 115 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 116 " instead\n" 117 " '-c' indicates that target image must be compressed (qcow format only)\n" 118 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 119 " match exactly. The image doesn't need a working backing file before\n" 120 " rebasing in this case (useful for renaming the backing file)\n" 121 " '-h' with or without a command shows this help and lists the supported formats\n" 122 " '-p' show progress of command (only certain commands)\n" 123 " '-q' use Quiet mode - do not print any output (except errors)\n" 124 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 125 " contain only zeros for qemu-img to create a sparse image during\n" 126 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 127 " unallocated or zero sectors, and the destination image will always be\n" 128 " fully allocated\n" 129 " '--output' takes the format in which the output must be done (human or json)\n" 130 " '-n' skips the target volume creation (useful if the volume is created\n" 131 " prior to running qemu-img)\n" 132 "\n" 133 "Parameters to check subcommand:\n" 134 " '-r' tries to repair any inconsistencies that are found during the check.\n" 135 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 136 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 137 " hiding corruption that has already occurred.\n" 138 "\n" 139 "Parameters to snapshot subcommand:\n" 140 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 141 " '-a' applies a snapshot (revert disk to saved state)\n" 142 " '-c' creates a snapshot\n" 143 " '-d' deletes a snapshot\n" 144 " '-l' lists all snapshots in the given image\n" 145 "\n" 146 "Parameters to compare subcommand:\n" 147 " '-f' first image format\n" 148 " '-F' second image format\n" 149 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 150 151 printf("%s\nSupported formats:", help_msg); 152 bdrv_iterate_format(format_print, NULL); 153 printf("\n"); 154 exit(EXIT_SUCCESS); 155 } 156 157 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 158 { 159 int ret = 0; 160 if (!quiet) { 161 va_list args; 162 va_start(args, fmt); 163 ret = vprintf(fmt, args); 164 va_end(args); 165 } 166 return ret; 167 } 168 169 170 static int print_block_option_help(const char *filename, const char *fmt) 171 { 172 BlockDriver *drv, *proto_drv; 173 QemuOptsList *create_opts = NULL; 174 Error *local_err = NULL; 175 176 /* Find driver and parse its options */ 177 drv = bdrv_find_format(fmt); 178 if (!drv) { 179 error_report("Unknown file format '%s'", fmt); 180 return 1; 181 } 182 183 create_opts = qemu_opts_append(create_opts, drv->create_opts); 184 if (filename) { 185 proto_drv = bdrv_find_protocol(filename, true, &local_err); 186 if (!proto_drv) { 187 error_report_err(local_err); 188 qemu_opts_free(create_opts); 189 return 1; 190 } 191 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 192 } 193 194 qemu_opts_print_help(create_opts); 195 qemu_opts_free(create_opts); 196 return 0; 197 } 198 199 static BlockBackend *img_open(const char *id, const char *filename, 200 const char *fmt, int flags, 201 bool require_io, bool quiet) 202 { 203 BlockBackend *blk; 204 BlockDriverState *bs; 205 char password[256]; 206 Error *local_err = NULL; 207 QDict *options = NULL; 208 209 if (fmt) { 210 options = qdict_new(); 211 qdict_put(options, "driver", qstring_from_str(fmt)); 212 } 213 214 blk = blk_new_open(id, filename, NULL, options, flags, &local_err); 215 if (!blk) { 216 error_reportf_err(local_err, "Could not open '%s': ", filename); 217 goto fail; 218 } 219 220 bs = blk_bs(blk); 221 if (bdrv_is_encrypted(bs) && require_io) { 222 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 223 if (qemu_read_password(password, sizeof(password)) < 0) { 224 error_report("No password given"); 225 goto fail; 226 } 227 if (bdrv_set_key(bs, password) < 0) { 228 error_report("invalid password"); 229 goto fail; 230 } 231 } 232 return blk; 233 fail: 234 blk_unref(blk); 235 return NULL; 236 } 237 238 static int add_old_style_options(const char *fmt, QemuOpts *opts, 239 const char *base_filename, 240 const char *base_fmt) 241 { 242 Error *err = NULL; 243 244 if (base_filename) { 245 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 246 if (err) { 247 error_report("Backing file not supported for file format '%s'", 248 fmt); 249 error_free(err); 250 return -1; 251 } 252 } 253 if (base_fmt) { 254 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 255 if (err) { 256 error_report("Backing file format not supported for file " 257 "format '%s'", fmt); 258 error_free(err); 259 return -1; 260 } 261 } 262 return 0; 263 } 264 265 static int img_create(int argc, char **argv) 266 { 267 int c; 268 uint64_t img_size = -1; 269 const char *fmt = "raw"; 270 const char *base_fmt = NULL; 271 const char *filename; 272 const char *base_filename = NULL; 273 char *options = NULL; 274 Error *local_err = NULL; 275 bool quiet = false; 276 277 for(;;) { 278 c = getopt(argc, argv, "F:b:f:he6o:q"); 279 if (c == -1) { 280 break; 281 } 282 switch(c) { 283 case '?': 284 case 'h': 285 help(); 286 break; 287 case 'F': 288 base_fmt = optarg; 289 break; 290 case 'b': 291 base_filename = optarg; 292 break; 293 case 'f': 294 fmt = optarg; 295 break; 296 case 'e': 297 error_report("option -e is deprecated, please use \'-o " 298 "encryption\' instead!"); 299 goto fail; 300 case '6': 301 error_report("option -6 is deprecated, please use \'-o " 302 "compat6\' instead!"); 303 goto fail; 304 case 'o': 305 if (!is_valid_option_list(optarg)) { 306 error_report("Invalid option list: %s", optarg); 307 goto fail; 308 } 309 if (!options) { 310 options = g_strdup(optarg); 311 } else { 312 char *old_options = options; 313 options = g_strdup_printf("%s,%s", options, optarg); 314 g_free(old_options); 315 } 316 break; 317 case 'q': 318 quiet = true; 319 break; 320 } 321 } 322 323 /* Get the filename */ 324 filename = (optind < argc) ? argv[optind] : NULL; 325 if (options && has_help_option(options)) { 326 g_free(options); 327 return print_block_option_help(filename, fmt); 328 } 329 330 if (optind >= argc) { 331 error_exit("Expecting image file name"); 332 } 333 optind++; 334 335 /* Get image size, if specified */ 336 if (optind < argc) { 337 int64_t sval; 338 char *end; 339 sval = qemu_strtosz_suffix(argv[optind++], &end, 340 QEMU_STRTOSZ_DEFSUFFIX_B); 341 if (sval < 0 || *end) { 342 if (sval == -ERANGE) { 343 error_report("Image size must be less than 8 EiB!"); 344 } else { 345 error_report("Invalid image size specified! You may use k, M, " 346 "G, T, P or E suffixes for "); 347 error_report("kilobytes, megabytes, gigabytes, terabytes, " 348 "petabytes and exabytes."); 349 } 350 goto fail; 351 } 352 img_size = (uint64_t)sval; 353 } 354 if (optind != argc) { 355 error_exit("Unexpected argument: %s", argv[optind]); 356 } 357 358 bdrv_img_create(filename, fmt, base_filename, base_fmt, 359 options, img_size, BDRV_O_FLAGS, &local_err, quiet); 360 if (local_err) { 361 error_reportf_err(local_err, "%s: ", filename); 362 goto fail; 363 } 364 365 g_free(options); 366 return 0; 367 368 fail: 369 g_free(options); 370 return 1; 371 } 372 373 static void dump_json_image_check(ImageCheck *check, bool quiet) 374 { 375 Error *local_err = NULL; 376 QString *str; 377 QmpOutputVisitor *ov = qmp_output_visitor_new(); 378 QObject *obj; 379 visit_type_ImageCheck(qmp_output_get_visitor(ov), 380 &check, NULL, &local_err); 381 obj = qmp_output_get_qobject(ov); 382 str = qobject_to_json_pretty(obj); 383 assert(str != NULL); 384 qprintf(quiet, "%s\n", qstring_get_str(str)); 385 qobject_decref(obj); 386 qmp_output_visitor_cleanup(ov); 387 QDECREF(str); 388 } 389 390 static void dump_human_image_check(ImageCheck *check, bool quiet) 391 { 392 if (!(check->corruptions || check->leaks || check->check_errors)) { 393 qprintf(quiet, "No errors were found on the image.\n"); 394 } else { 395 if (check->corruptions) { 396 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 397 "Data may be corrupted, or further writes to the image " 398 "may corrupt it.\n", 399 check->corruptions); 400 } 401 402 if (check->leaks) { 403 qprintf(quiet, 404 "\n%" PRId64 " leaked clusters were found on the image.\n" 405 "This means waste of disk space, but no harm to data.\n", 406 check->leaks); 407 } 408 409 if (check->check_errors) { 410 qprintf(quiet, 411 "\n%" PRId64 412 " internal errors have occurred during the check.\n", 413 check->check_errors); 414 } 415 } 416 417 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 418 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 419 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 420 check->allocated_clusters, check->total_clusters, 421 check->allocated_clusters * 100.0 / check->total_clusters, 422 check->fragmented_clusters * 100.0 / check->allocated_clusters, 423 check->compressed_clusters * 100.0 / 424 check->allocated_clusters); 425 } 426 427 if (check->image_end_offset) { 428 qprintf(quiet, 429 "Image end offset: %" PRId64 "\n", check->image_end_offset); 430 } 431 } 432 433 static int collect_image_check(BlockDriverState *bs, 434 ImageCheck *check, 435 const char *filename, 436 const char *fmt, 437 int fix) 438 { 439 int ret; 440 BdrvCheckResult result; 441 442 ret = bdrv_check(bs, &result, fix); 443 if (ret < 0) { 444 return ret; 445 } 446 447 check->filename = g_strdup(filename); 448 check->format = g_strdup(bdrv_get_format_name(bs)); 449 check->check_errors = result.check_errors; 450 check->corruptions = result.corruptions; 451 check->has_corruptions = result.corruptions != 0; 452 check->leaks = result.leaks; 453 check->has_leaks = result.leaks != 0; 454 check->corruptions_fixed = result.corruptions_fixed; 455 check->has_corruptions_fixed = result.corruptions != 0; 456 check->leaks_fixed = result.leaks_fixed; 457 check->has_leaks_fixed = result.leaks != 0; 458 check->image_end_offset = result.image_end_offset; 459 check->has_image_end_offset = result.image_end_offset != 0; 460 check->total_clusters = result.bfi.total_clusters; 461 check->has_total_clusters = result.bfi.total_clusters != 0; 462 check->allocated_clusters = result.bfi.allocated_clusters; 463 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 464 check->fragmented_clusters = result.bfi.fragmented_clusters; 465 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 466 check->compressed_clusters = result.bfi.compressed_clusters; 467 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 468 469 return 0; 470 } 471 472 /* 473 * Checks an image for consistency. Exit codes: 474 * 475 * 0 - Check completed, image is good 476 * 1 - Check not completed because of internal errors 477 * 2 - Check completed, image is corrupted 478 * 3 - Check completed, image has leaked clusters, but is good otherwise 479 * 63 - Checks are not supported by the image format 480 */ 481 static int img_check(int argc, char **argv) 482 { 483 int c, ret; 484 OutputFormat output_format = OFORMAT_HUMAN; 485 const char *filename, *fmt, *output, *cache; 486 BlockBackend *blk; 487 BlockDriverState *bs; 488 int fix = 0; 489 int flags = BDRV_O_FLAGS | BDRV_O_CHECK; 490 ImageCheck *check; 491 bool quiet = false; 492 493 fmt = NULL; 494 output = NULL; 495 cache = BDRV_DEFAULT_CACHE; 496 for(;;) { 497 int option_index = 0; 498 static const struct option long_options[] = { 499 {"help", no_argument, 0, 'h'}, 500 {"format", required_argument, 0, 'f'}, 501 {"repair", required_argument, 0, 'r'}, 502 {"output", required_argument, 0, OPTION_OUTPUT}, 503 {0, 0, 0, 0} 504 }; 505 c = getopt_long(argc, argv, "hf:r:T:q", 506 long_options, &option_index); 507 if (c == -1) { 508 break; 509 } 510 switch(c) { 511 case '?': 512 case 'h': 513 help(); 514 break; 515 case 'f': 516 fmt = optarg; 517 break; 518 case 'r': 519 flags |= BDRV_O_RDWR; 520 521 if (!strcmp(optarg, "leaks")) { 522 fix = BDRV_FIX_LEAKS; 523 } else if (!strcmp(optarg, "all")) { 524 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 525 } else { 526 error_exit("Unknown option value for -r " 527 "(expecting 'leaks' or 'all'): %s", optarg); 528 } 529 break; 530 case OPTION_OUTPUT: 531 output = optarg; 532 break; 533 case 'T': 534 cache = optarg; 535 break; 536 case 'q': 537 quiet = true; 538 break; 539 } 540 } 541 if (optind != argc - 1) { 542 error_exit("Expecting one image file name"); 543 } 544 filename = argv[optind++]; 545 546 if (output && !strcmp(output, "json")) { 547 output_format = OFORMAT_JSON; 548 } else if (output && !strcmp(output, "human")) { 549 output_format = OFORMAT_HUMAN; 550 } else if (output) { 551 error_report("--output must be used with human or json as argument."); 552 return 1; 553 } 554 555 ret = bdrv_parse_cache_flags(cache, &flags); 556 if (ret < 0) { 557 error_report("Invalid source cache option: %s", cache); 558 return 1; 559 } 560 561 blk = img_open("image", filename, fmt, flags, true, quiet); 562 if (!blk) { 563 return 1; 564 } 565 bs = blk_bs(blk); 566 567 check = g_new0(ImageCheck, 1); 568 ret = collect_image_check(bs, check, filename, fmt, fix); 569 570 if (ret == -ENOTSUP) { 571 error_report("This image format does not support checks"); 572 ret = 63; 573 goto fail; 574 } 575 576 if (check->corruptions_fixed || check->leaks_fixed) { 577 int corruptions_fixed, leaks_fixed; 578 579 leaks_fixed = check->leaks_fixed; 580 corruptions_fixed = check->corruptions_fixed; 581 582 if (output_format == OFORMAT_HUMAN) { 583 qprintf(quiet, 584 "The following inconsistencies were found and repaired:\n\n" 585 " %" PRId64 " leaked clusters\n" 586 " %" PRId64 " corruptions\n\n" 587 "Double checking the fixed image now...\n", 588 check->leaks_fixed, 589 check->corruptions_fixed); 590 } 591 592 ret = collect_image_check(bs, check, filename, fmt, 0); 593 594 check->leaks_fixed = leaks_fixed; 595 check->corruptions_fixed = corruptions_fixed; 596 } 597 598 if (!ret) { 599 switch (output_format) { 600 case OFORMAT_HUMAN: 601 dump_human_image_check(check, quiet); 602 break; 603 case OFORMAT_JSON: 604 dump_json_image_check(check, quiet); 605 break; 606 } 607 } 608 609 if (ret || check->check_errors) { 610 if (ret) { 611 error_report("Check failed: %s", strerror(-ret)); 612 } else { 613 error_report("Check failed"); 614 } 615 ret = 1; 616 goto fail; 617 } 618 619 if (check->corruptions) { 620 ret = 2; 621 } else if (check->leaks) { 622 ret = 3; 623 } else { 624 ret = 0; 625 } 626 627 fail: 628 qapi_free_ImageCheck(check); 629 blk_unref(blk); 630 return ret; 631 } 632 633 typedef struct CommonBlockJobCBInfo { 634 BlockDriverState *bs; 635 Error **errp; 636 } CommonBlockJobCBInfo; 637 638 static void common_block_job_cb(void *opaque, int ret) 639 { 640 CommonBlockJobCBInfo *cbi = opaque; 641 642 if (ret < 0) { 643 error_setg_errno(cbi->errp, -ret, "Block job failed"); 644 } 645 } 646 647 static void run_block_job(BlockJob *job, Error **errp) 648 { 649 AioContext *aio_context = bdrv_get_aio_context(job->bs); 650 651 do { 652 aio_poll(aio_context, true); 653 qemu_progress_print(job->len ? 654 ((float)job->offset / job->len * 100.f) : 0.0f, 0); 655 } while (!job->ready); 656 657 block_job_complete_sync(job, errp); 658 659 /* A block job may finish instantaneously without publishing any progress, 660 * so just signal completion here */ 661 qemu_progress_print(100.f, 0); 662 } 663 664 static int img_commit(int argc, char **argv) 665 { 666 int c, ret, flags; 667 const char *filename, *fmt, *cache, *base; 668 BlockBackend *blk; 669 BlockDriverState *bs, *base_bs; 670 bool progress = false, quiet = false, drop = false; 671 Error *local_err = NULL; 672 CommonBlockJobCBInfo cbi; 673 674 fmt = NULL; 675 cache = BDRV_DEFAULT_CACHE; 676 base = NULL; 677 for(;;) { 678 c = getopt(argc, argv, "f:ht:b:dpq"); 679 if (c == -1) { 680 break; 681 } 682 switch(c) { 683 case '?': 684 case 'h': 685 help(); 686 break; 687 case 'f': 688 fmt = optarg; 689 break; 690 case 't': 691 cache = optarg; 692 break; 693 case 'b': 694 base = optarg; 695 /* -b implies -d */ 696 drop = true; 697 break; 698 case 'd': 699 drop = true; 700 break; 701 case 'p': 702 progress = true; 703 break; 704 case 'q': 705 quiet = true; 706 break; 707 } 708 } 709 710 /* Progress is not shown in Quiet mode */ 711 if (quiet) { 712 progress = false; 713 } 714 715 if (optind != argc - 1) { 716 error_exit("Expecting one image file name"); 717 } 718 filename = argv[optind++]; 719 720 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 721 ret = bdrv_parse_cache_flags(cache, &flags); 722 if (ret < 0) { 723 error_report("Invalid cache option: %s", cache); 724 return 1; 725 } 726 727 blk = img_open("image", filename, fmt, flags, true, quiet); 728 if (!blk) { 729 return 1; 730 } 731 bs = blk_bs(blk); 732 733 qemu_progress_init(progress, 1.f); 734 qemu_progress_print(0.f, 100); 735 736 if (base) { 737 base_bs = bdrv_find_backing_image(bs, base); 738 if (!base_bs) { 739 error_setg(&local_err, QERR_BASE_NOT_FOUND, base); 740 goto done; 741 } 742 } else { 743 /* This is different from QMP, which by default uses the deepest file in 744 * the backing chain (i.e., the very base); however, the traditional 745 * behavior of qemu-img commit is using the immediate backing file. */ 746 base_bs = backing_bs(bs); 747 if (!base_bs) { 748 error_setg(&local_err, "Image does not have a backing file"); 749 goto done; 750 } 751 } 752 753 cbi = (CommonBlockJobCBInfo){ 754 .errp = &local_err, 755 .bs = bs, 756 }; 757 758 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 759 common_block_job_cb, &cbi, &local_err); 760 if (local_err) { 761 goto done; 762 } 763 764 /* When the block job completes, the BlockBackend reference will point to 765 * the old backing file. In order to avoid that the top image is already 766 * deleted, so we can still empty it afterwards, increment the reference 767 * counter here preemptively. */ 768 if (!drop) { 769 bdrv_ref(bs); 770 } 771 772 run_block_job(bs->job, &local_err); 773 if (local_err) { 774 goto unref_backing; 775 } 776 777 if (!drop && bs->drv->bdrv_make_empty) { 778 ret = bs->drv->bdrv_make_empty(bs); 779 if (ret) { 780 error_setg_errno(&local_err, -ret, "Could not empty %s", 781 filename); 782 goto unref_backing; 783 } 784 } 785 786 unref_backing: 787 if (!drop) { 788 bdrv_unref(bs); 789 } 790 791 done: 792 qemu_progress_end(); 793 794 blk_unref(blk); 795 796 if (local_err) { 797 error_report_err(local_err); 798 return 1; 799 } 800 801 qprintf(quiet, "Image committed.\n"); 802 return 0; 803 } 804 805 /* 806 * Returns true iff the first sector pointed to by 'buf' contains at least 807 * a non-NUL byte. 808 * 809 * 'pnum' is set to the number of sectors (including and immediately following 810 * the first one) that are known to be in the same allocated/unallocated state. 811 */ 812 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 813 { 814 bool is_zero; 815 int i; 816 817 if (n <= 0) { 818 *pnum = 0; 819 return 0; 820 } 821 is_zero = buffer_is_zero(buf, 512); 822 for(i = 1; i < n; i++) { 823 buf += 512; 824 if (is_zero != buffer_is_zero(buf, 512)) { 825 break; 826 } 827 } 828 *pnum = i; 829 return !is_zero; 830 } 831 832 /* 833 * Like is_allocated_sectors, but if the buffer starts with a used sector, 834 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 835 * breaking up write requests for only small sparse areas. 836 */ 837 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 838 int min) 839 { 840 int ret; 841 int num_checked, num_used; 842 843 if (n < min) { 844 min = n; 845 } 846 847 ret = is_allocated_sectors(buf, n, pnum); 848 if (!ret) { 849 return ret; 850 } 851 852 num_used = *pnum; 853 buf += BDRV_SECTOR_SIZE * *pnum; 854 n -= *pnum; 855 num_checked = num_used; 856 857 while (n > 0) { 858 ret = is_allocated_sectors(buf, n, pnum); 859 860 buf += BDRV_SECTOR_SIZE * *pnum; 861 n -= *pnum; 862 num_checked += *pnum; 863 if (ret) { 864 num_used = num_checked; 865 } else if (*pnum >= min) { 866 break; 867 } 868 } 869 870 *pnum = num_used; 871 return 1; 872 } 873 874 /* 875 * Compares two buffers sector by sector. Returns 0 if the first sector of both 876 * buffers matches, non-zero otherwise. 877 * 878 * pnum is set to the number of sectors (including and immediately following 879 * the first one) that are known to have the same comparison result 880 */ 881 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 882 int *pnum) 883 { 884 bool res; 885 int i; 886 887 if (n <= 0) { 888 *pnum = 0; 889 return 0; 890 } 891 892 res = !!memcmp(buf1, buf2, 512); 893 for(i = 1; i < n; i++) { 894 buf1 += 512; 895 buf2 += 512; 896 897 if (!!memcmp(buf1, buf2, 512) != res) { 898 break; 899 } 900 } 901 902 *pnum = i; 903 return res; 904 } 905 906 #define IO_BUF_SIZE (2 * 1024 * 1024) 907 908 static int64_t sectors_to_bytes(int64_t sectors) 909 { 910 return sectors << BDRV_SECTOR_BITS; 911 } 912 913 static int64_t sectors_to_process(int64_t total, int64_t from) 914 { 915 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 916 } 917 918 /* 919 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 920 * 921 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 922 * data and negative value on error. 923 * 924 * @param blk: BlockBackend for the image 925 * @param sect_num: Number of first sector to check 926 * @param sect_count: Number of sectors to check 927 * @param filename: Name of disk file we are checking (logging purpose) 928 * @param buffer: Allocated buffer for storing read data 929 * @param quiet: Flag for quiet mode 930 */ 931 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 932 int sect_count, const char *filename, 933 uint8_t *buffer, bool quiet) 934 { 935 int pnum, ret = 0; 936 ret = blk_read(blk, sect_num, buffer, sect_count); 937 if (ret < 0) { 938 error_report("Error while reading offset %" PRId64 " of %s: %s", 939 sectors_to_bytes(sect_num), filename, strerror(-ret)); 940 return ret; 941 } 942 ret = is_allocated_sectors(buffer, sect_count, &pnum); 943 if (ret || pnum != sect_count) { 944 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 945 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 946 return 1; 947 } 948 949 return 0; 950 } 951 952 /* 953 * Compares two images. Exit codes: 954 * 955 * 0 - Images are identical 956 * 1 - Images differ 957 * >1 - Error occurred 958 */ 959 static int img_compare(int argc, char **argv) 960 { 961 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 962 BlockBackend *blk1, *blk2; 963 BlockDriverState *bs1, *bs2; 964 int64_t total_sectors1, total_sectors2; 965 uint8_t *buf1 = NULL, *buf2 = NULL; 966 int pnum1, pnum2; 967 int allocated1, allocated2; 968 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 969 bool progress = false, quiet = false, strict = false; 970 int flags; 971 int64_t total_sectors; 972 int64_t sector_num = 0; 973 int64_t nb_sectors; 974 int c, pnum; 975 uint64_t progress_base; 976 977 cache = BDRV_DEFAULT_CACHE; 978 for (;;) { 979 c = getopt(argc, argv, "hf:F:T:pqs"); 980 if (c == -1) { 981 break; 982 } 983 switch (c) { 984 case '?': 985 case 'h': 986 help(); 987 break; 988 case 'f': 989 fmt1 = optarg; 990 break; 991 case 'F': 992 fmt2 = optarg; 993 break; 994 case 'T': 995 cache = optarg; 996 break; 997 case 'p': 998 progress = true; 999 break; 1000 case 'q': 1001 quiet = true; 1002 break; 1003 case 's': 1004 strict = true; 1005 break; 1006 } 1007 } 1008 1009 /* Progress is not shown in Quiet mode */ 1010 if (quiet) { 1011 progress = false; 1012 } 1013 1014 1015 if (optind != argc - 2) { 1016 error_exit("Expecting two image file names"); 1017 } 1018 filename1 = argv[optind++]; 1019 filename2 = argv[optind++]; 1020 1021 /* Initialize before goto out */ 1022 qemu_progress_init(progress, 2.0); 1023 1024 flags = BDRV_O_FLAGS; 1025 ret = bdrv_parse_cache_flags(cache, &flags); 1026 if (ret < 0) { 1027 error_report("Invalid source cache option: %s", cache); 1028 ret = 2; 1029 goto out3; 1030 } 1031 1032 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); 1033 if (!blk1) { 1034 ret = 2; 1035 goto out3; 1036 } 1037 bs1 = blk_bs(blk1); 1038 1039 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1040 if (!blk2) { 1041 ret = 2; 1042 goto out2; 1043 } 1044 bs2 = blk_bs(blk2); 1045 1046 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1047 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1048 total_sectors1 = blk_nb_sectors(blk1); 1049 if (total_sectors1 < 0) { 1050 error_report("Can't get size of %s: %s", 1051 filename1, strerror(-total_sectors1)); 1052 ret = 4; 1053 goto out; 1054 } 1055 total_sectors2 = blk_nb_sectors(blk2); 1056 if (total_sectors2 < 0) { 1057 error_report("Can't get size of %s: %s", 1058 filename2, strerror(-total_sectors2)); 1059 ret = 4; 1060 goto out; 1061 } 1062 total_sectors = MIN(total_sectors1, total_sectors2); 1063 progress_base = MAX(total_sectors1, total_sectors2); 1064 1065 qemu_progress_print(0, 100); 1066 1067 if (strict && total_sectors1 != total_sectors2) { 1068 ret = 1; 1069 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1070 goto out; 1071 } 1072 1073 for (;;) { 1074 int64_t status1, status2; 1075 nb_sectors = sectors_to_process(total_sectors, sector_num); 1076 if (nb_sectors <= 0) { 1077 break; 1078 } 1079 status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, 1080 total_sectors1 - sector_num, 1081 &pnum1); 1082 if (status1 < 0) { 1083 ret = 3; 1084 error_report("Sector allocation test failed for %s", filename1); 1085 goto out; 1086 } 1087 allocated1 = status1 & BDRV_BLOCK_ALLOCATED; 1088 1089 status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, 1090 total_sectors2 - sector_num, 1091 &pnum2); 1092 if (status2 < 0) { 1093 ret = 3; 1094 error_report("Sector allocation test failed for %s", filename2); 1095 goto out; 1096 } 1097 allocated2 = status2 & BDRV_BLOCK_ALLOCATED; 1098 if (pnum1) { 1099 nb_sectors = MIN(nb_sectors, pnum1); 1100 } 1101 if (pnum2) { 1102 nb_sectors = MIN(nb_sectors, pnum2); 1103 } 1104 1105 if (strict) { 1106 if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != 1107 (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { 1108 ret = 1; 1109 qprintf(quiet, "Strict mode: Offset %" PRId64 1110 " block status mismatch!\n", 1111 sectors_to_bytes(sector_num)); 1112 goto out; 1113 } 1114 } 1115 if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { 1116 nb_sectors = MIN(pnum1, pnum2); 1117 } else if (allocated1 == allocated2) { 1118 if (allocated1) { 1119 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1120 if (ret < 0) { 1121 error_report("Error while reading offset %" PRId64 " of %s:" 1122 " %s", sectors_to_bytes(sector_num), filename1, 1123 strerror(-ret)); 1124 ret = 4; 1125 goto out; 1126 } 1127 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1128 if (ret < 0) { 1129 error_report("Error while reading offset %" PRId64 1130 " of %s: %s", sectors_to_bytes(sector_num), 1131 filename2, strerror(-ret)); 1132 ret = 4; 1133 goto out; 1134 } 1135 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1136 if (ret || pnum != nb_sectors) { 1137 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1138 sectors_to_bytes( 1139 ret ? sector_num : sector_num + pnum)); 1140 ret = 1; 1141 goto out; 1142 } 1143 } 1144 } else { 1145 1146 if (allocated1) { 1147 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1148 filename1, buf1, quiet); 1149 } else { 1150 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1151 filename2, buf1, quiet); 1152 } 1153 if (ret) { 1154 if (ret < 0) { 1155 error_report("Error while reading offset %" PRId64 ": %s", 1156 sectors_to_bytes(sector_num), strerror(-ret)); 1157 ret = 4; 1158 } 1159 goto out; 1160 } 1161 } 1162 sector_num += nb_sectors; 1163 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1164 } 1165 1166 if (total_sectors1 != total_sectors2) { 1167 BlockBackend *blk_over; 1168 int64_t total_sectors_over; 1169 const char *filename_over; 1170 1171 qprintf(quiet, "Warning: Image size mismatch!\n"); 1172 if (total_sectors1 > total_sectors2) { 1173 total_sectors_over = total_sectors1; 1174 blk_over = blk1; 1175 filename_over = filename1; 1176 } else { 1177 total_sectors_over = total_sectors2; 1178 blk_over = blk2; 1179 filename_over = filename2; 1180 } 1181 1182 for (;;) { 1183 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1184 if (nb_sectors <= 0) { 1185 break; 1186 } 1187 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1188 nb_sectors, &pnum); 1189 if (ret < 0) { 1190 ret = 3; 1191 error_report("Sector allocation test failed for %s", 1192 filename_over); 1193 goto out; 1194 1195 } 1196 nb_sectors = pnum; 1197 if (ret) { 1198 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1199 filename_over, buf1, quiet); 1200 if (ret) { 1201 if (ret < 0) { 1202 error_report("Error while reading offset %" PRId64 1203 " of %s: %s", sectors_to_bytes(sector_num), 1204 filename_over, strerror(-ret)); 1205 ret = 4; 1206 } 1207 goto out; 1208 } 1209 } 1210 sector_num += nb_sectors; 1211 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1212 } 1213 } 1214 1215 qprintf(quiet, "Images are identical.\n"); 1216 ret = 0; 1217 1218 out: 1219 qemu_vfree(buf1); 1220 qemu_vfree(buf2); 1221 blk_unref(blk2); 1222 out2: 1223 blk_unref(blk1); 1224 out3: 1225 qemu_progress_end(); 1226 return ret; 1227 } 1228 1229 enum ImgConvertBlockStatus { 1230 BLK_DATA, 1231 BLK_ZERO, 1232 BLK_BACKING_FILE, 1233 }; 1234 1235 typedef struct ImgConvertState { 1236 BlockBackend **src; 1237 int64_t *src_sectors; 1238 int src_cur, src_num; 1239 int64_t src_cur_offset; 1240 int64_t total_sectors; 1241 int64_t allocated_sectors; 1242 enum ImgConvertBlockStatus status; 1243 int64_t sector_next_status; 1244 BlockBackend *target; 1245 bool has_zero_init; 1246 bool compressed; 1247 bool target_has_backing; 1248 int min_sparse; 1249 size_t cluster_sectors; 1250 size_t buf_sectors; 1251 } ImgConvertState; 1252 1253 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1254 { 1255 assert(sector_num >= s->src_cur_offset); 1256 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1257 s->src_cur_offset += s->src_sectors[s->src_cur]; 1258 s->src_cur++; 1259 assert(s->src_cur < s->src_num); 1260 } 1261 } 1262 1263 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1264 { 1265 int64_t ret; 1266 int n; 1267 1268 convert_select_part(s, sector_num); 1269 1270 assert(s->total_sectors > sector_num); 1271 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1272 1273 if (s->sector_next_status <= sector_num) { 1274 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1275 sector_num - s->src_cur_offset, 1276 n, &n); 1277 if (ret < 0) { 1278 return ret; 1279 } 1280 1281 if (ret & BDRV_BLOCK_ZERO) { 1282 s->status = BLK_ZERO; 1283 } else if (ret & BDRV_BLOCK_DATA) { 1284 s->status = BLK_DATA; 1285 } else if (!s->target_has_backing) { 1286 /* Without a target backing file we must copy over the contents of 1287 * the backing file as well. */ 1288 /* TODO Check block status of the backing file chain to avoid 1289 * needlessly reading zeroes and limiting the iteration to the 1290 * buffer size */ 1291 s->status = BLK_DATA; 1292 } else { 1293 s->status = BLK_BACKING_FILE; 1294 } 1295 1296 s->sector_next_status = sector_num + n; 1297 } 1298 1299 n = MIN(n, s->sector_next_status - sector_num); 1300 if (s->status == BLK_DATA) { 1301 n = MIN(n, s->buf_sectors); 1302 } 1303 1304 /* We need to write complete clusters for compressed images, so if an 1305 * unallocated area is shorter than that, we must consider the whole 1306 * cluster allocated. */ 1307 if (s->compressed) { 1308 if (n < s->cluster_sectors) { 1309 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1310 s->status = BLK_DATA; 1311 } else { 1312 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1313 } 1314 } 1315 1316 return n; 1317 } 1318 1319 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1320 uint8_t *buf) 1321 { 1322 int n; 1323 int ret; 1324 1325 if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { 1326 return 0; 1327 } 1328 1329 assert(nb_sectors <= s->buf_sectors); 1330 while (nb_sectors > 0) { 1331 BlockBackend *blk; 1332 int64_t bs_sectors; 1333 1334 /* In the case of compression with multiple source files, we can get a 1335 * nb_sectors that spreads into the next part. So we must be able to 1336 * read across multiple BDSes for one convert_read() call. */ 1337 convert_select_part(s, sector_num); 1338 blk = s->src[s->src_cur]; 1339 bs_sectors = s->src_sectors[s->src_cur]; 1340 1341 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1342 ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); 1343 if (ret < 0) { 1344 return ret; 1345 } 1346 1347 sector_num += n; 1348 nb_sectors -= n; 1349 buf += n * BDRV_SECTOR_SIZE; 1350 } 1351 1352 return 0; 1353 } 1354 1355 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1356 const uint8_t *buf) 1357 { 1358 int ret; 1359 1360 while (nb_sectors > 0) { 1361 int n = nb_sectors; 1362 1363 switch (s->status) { 1364 case BLK_BACKING_FILE: 1365 /* If we have a backing file, leave clusters unallocated that are 1366 * unallocated in the source image, so that the backing file is 1367 * visible at the respective offset. */ 1368 assert(s->target_has_backing); 1369 break; 1370 1371 case BLK_DATA: 1372 /* We must always write compressed clusters as a whole, so don't 1373 * try to find zeroed parts in the buffer. We can only save the 1374 * write if the buffer is completely zeroed and we're allowed to 1375 * keep the target sparse. */ 1376 if (s->compressed) { 1377 if (s->has_zero_init && s->min_sparse && 1378 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1379 { 1380 assert(!s->target_has_backing); 1381 break; 1382 } 1383 1384 ret = blk_write_compressed(s->target, sector_num, buf, n); 1385 if (ret < 0) { 1386 return ret; 1387 } 1388 break; 1389 } 1390 1391 /* If there is real non-zero data or we're told to keep the target 1392 * fully allocated (-S 0), we must write it. Otherwise we can treat 1393 * it as zero sectors. */ 1394 if (!s->min_sparse || 1395 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1396 { 1397 ret = blk_write(s->target, sector_num, buf, n); 1398 if (ret < 0) { 1399 return ret; 1400 } 1401 break; 1402 } 1403 /* fall-through */ 1404 1405 case BLK_ZERO: 1406 if (s->has_zero_init) { 1407 break; 1408 } 1409 ret = blk_write_zeroes(s->target, sector_num, n, 0); 1410 if (ret < 0) { 1411 return ret; 1412 } 1413 break; 1414 } 1415 1416 sector_num += n; 1417 nb_sectors -= n; 1418 buf += n * BDRV_SECTOR_SIZE; 1419 } 1420 1421 return 0; 1422 } 1423 1424 static int convert_do_copy(ImgConvertState *s) 1425 { 1426 uint8_t *buf = NULL; 1427 int64_t sector_num, allocated_done; 1428 int ret; 1429 int n; 1430 1431 /* Check whether we have zero initialisation or can get it efficiently */ 1432 s->has_zero_init = s->min_sparse && !s->target_has_backing 1433 ? bdrv_has_zero_init(blk_bs(s->target)) 1434 : false; 1435 1436 if (!s->has_zero_init && !s->target_has_backing && 1437 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1438 { 1439 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1440 if (ret == 0) { 1441 s->has_zero_init = true; 1442 } 1443 } 1444 1445 /* Allocate buffer for copied data. For compressed images, only one cluster 1446 * can be copied at a time. */ 1447 if (s->compressed) { 1448 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1449 error_report("invalid cluster size"); 1450 ret = -EINVAL; 1451 goto fail; 1452 } 1453 s->buf_sectors = s->cluster_sectors; 1454 } 1455 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1456 1457 /* Calculate allocated sectors for progress */ 1458 s->allocated_sectors = 0; 1459 sector_num = 0; 1460 while (sector_num < s->total_sectors) { 1461 n = convert_iteration_sectors(s, sector_num); 1462 if (n < 0) { 1463 ret = n; 1464 goto fail; 1465 } 1466 if (s->status == BLK_DATA) { 1467 s->allocated_sectors += n; 1468 } 1469 sector_num += n; 1470 } 1471 1472 /* Do the copy */ 1473 s->src_cur = 0; 1474 s->src_cur_offset = 0; 1475 s->sector_next_status = 0; 1476 1477 sector_num = 0; 1478 allocated_done = 0; 1479 1480 while (sector_num < s->total_sectors) { 1481 n = convert_iteration_sectors(s, sector_num); 1482 if (n < 0) { 1483 ret = n; 1484 goto fail; 1485 } 1486 if (s->status == BLK_DATA) { 1487 allocated_done += n; 1488 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1489 0); 1490 } 1491 1492 ret = convert_read(s, sector_num, n, buf); 1493 if (ret < 0) { 1494 error_report("error while reading sector %" PRId64 1495 ": %s", sector_num, strerror(-ret)); 1496 goto fail; 1497 } 1498 1499 ret = convert_write(s, sector_num, n, buf); 1500 if (ret < 0) { 1501 error_report("error while writing sector %" PRId64 1502 ": %s", sector_num, strerror(-ret)); 1503 goto fail; 1504 } 1505 1506 sector_num += n; 1507 } 1508 1509 if (s->compressed) { 1510 /* signal EOF to align */ 1511 ret = blk_write_compressed(s->target, 0, NULL, 0); 1512 if (ret < 0) { 1513 goto fail; 1514 } 1515 } 1516 1517 ret = 0; 1518 fail: 1519 qemu_vfree(buf); 1520 return ret; 1521 } 1522 1523 static int img_convert(int argc, char **argv) 1524 { 1525 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1526 int64_t ret = 0; 1527 int progress = 0, flags, src_flags; 1528 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1529 BlockDriver *drv, *proto_drv; 1530 BlockBackend **blk = NULL, *out_blk = NULL; 1531 BlockDriverState **bs = NULL, *out_bs = NULL; 1532 int64_t total_sectors; 1533 int64_t *bs_sectors = NULL; 1534 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1535 BlockDriverInfo bdi; 1536 QemuOpts *opts = NULL; 1537 QemuOptsList *create_opts = NULL; 1538 const char *out_baseimg_param; 1539 char *options = NULL; 1540 const char *snapshot_name = NULL; 1541 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1542 bool quiet = false; 1543 Error *local_err = NULL; 1544 QemuOpts *sn_opts = NULL; 1545 ImgConvertState state; 1546 1547 fmt = NULL; 1548 out_fmt = "raw"; 1549 cache = "unsafe"; 1550 src_cache = BDRV_DEFAULT_CACHE; 1551 out_baseimg = NULL; 1552 compress = 0; 1553 skip_create = 0; 1554 for(;;) { 1555 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1556 if (c == -1) { 1557 break; 1558 } 1559 switch(c) { 1560 case '?': 1561 case 'h': 1562 help(); 1563 break; 1564 case 'f': 1565 fmt = optarg; 1566 break; 1567 case 'O': 1568 out_fmt = optarg; 1569 break; 1570 case 'B': 1571 out_baseimg = optarg; 1572 break; 1573 case 'c': 1574 compress = 1; 1575 break; 1576 case 'e': 1577 error_report("option -e is deprecated, please use \'-o " 1578 "encryption\' instead!"); 1579 ret = -1; 1580 goto fail_getopt; 1581 case '6': 1582 error_report("option -6 is deprecated, please use \'-o " 1583 "compat6\' instead!"); 1584 ret = -1; 1585 goto fail_getopt; 1586 case 'o': 1587 if (!is_valid_option_list(optarg)) { 1588 error_report("Invalid option list: %s", optarg); 1589 ret = -1; 1590 goto fail_getopt; 1591 } 1592 if (!options) { 1593 options = g_strdup(optarg); 1594 } else { 1595 char *old_options = options; 1596 options = g_strdup_printf("%s,%s", options, optarg); 1597 g_free(old_options); 1598 } 1599 break; 1600 case 's': 1601 snapshot_name = optarg; 1602 break; 1603 case 'l': 1604 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1605 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1606 optarg, false); 1607 if (!sn_opts) { 1608 error_report("Failed in parsing snapshot param '%s'", 1609 optarg); 1610 ret = -1; 1611 goto fail_getopt; 1612 } 1613 } else { 1614 snapshot_name = optarg; 1615 } 1616 break; 1617 case 'S': 1618 { 1619 int64_t sval; 1620 char *end; 1621 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 1622 if (sval < 0 || *end) { 1623 error_report("Invalid minimum zero buffer size for sparse output specified"); 1624 ret = -1; 1625 goto fail_getopt; 1626 } 1627 1628 min_sparse = sval / BDRV_SECTOR_SIZE; 1629 break; 1630 } 1631 case 'p': 1632 progress = 1; 1633 break; 1634 case 't': 1635 cache = optarg; 1636 break; 1637 case 'T': 1638 src_cache = optarg; 1639 break; 1640 case 'q': 1641 quiet = true; 1642 break; 1643 case 'n': 1644 skip_create = 1; 1645 break; 1646 } 1647 } 1648 1649 /* Initialize before goto out */ 1650 if (quiet) { 1651 progress = 0; 1652 } 1653 qemu_progress_init(progress, 1.0); 1654 1655 1656 bs_n = argc - optind - 1; 1657 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1658 1659 if (options && has_help_option(options)) { 1660 ret = print_block_option_help(out_filename, out_fmt); 1661 goto out; 1662 } 1663 1664 if (bs_n < 1) { 1665 error_exit("Must specify image file name"); 1666 } 1667 1668 1669 if (bs_n > 1 && out_baseimg) { 1670 error_report("-B makes no sense when concatenating multiple input " 1671 "images"); 1672 ret = -1; 1673 goto out; 1674 } 1675 1676 src_flags = BDRV_O_FLAGS; 1677 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1678 if (ret < 0) { 1679 error_report("Invalid source cache option: %s", src_cache); 1680 goto out; 1681 } 1682 1683 qemu_progress_print(0, 100); 1684 1685 blk = g_new0(BlockBackend *, bs_n); 1686 bs = g_new0(BlockDriverState *, bs_n); 1687 bs_sectors = g_new(int64_t, bs_n); 1688 1689 total_sectors = 0; 1690 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1691 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1692 : g_strdup("source"); 1693 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1694 true, quiet); 1695 g_free(id); 1696 if (!blk[bs_i]) { 1697 ret = -1; 1698 goto out; 1699 } 1700 bs[bs_i] = blk_bs(blk[bs_i]); 1701 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1702 if (bs_sectors[bs_i] < 0) { 1703 error_report("Could not get size of %s: %s", 1704 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1705 ret = -1; 1706 goto out; 1707 } 1708 total_sectors += bs_sectors[bs_i]; 1709 } 1710 1711 if (sn_opts) { 1712 ret = bdrv_snapshot_load_tmp(bs[0], 1713 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1714 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1715 &local_err); 1716 } else if (snapshot_name != NULL) { 1717 if (bs_n > 1) { 1718 error_report("No support for concatenating multiple snapshot"); 1719 ret = -1; 1720 goto out; 1721 } 1722 1723 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1724 } 1725 if (local_err) { 1726 error_reportf_err(local_err, "Failed to load snapshot: "); 1727 ret = -1; 1728 goto out; 1729 } 1730 1731 /* Find driver and parse its options */ 1732 drv = bdrv_find_format(out_fmt); 1733 if (!drv) { 1734 error_report("Unknown file format '%s'", out_fmt); 1735 ret = -1; 1736 goto out; 1737 } 1738 1739 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1740 if (!proto_drv) { 1741 error_report_err(local_err); 1742 ret = -1; 1743 goto out; 1744 } 1745 1746 if (!skip_create) { 1747 if (!drv->create_opts) { 1748 error_report("Format driver '%s' does not support image creation", 1749 drv->format_name); 1750 ret = -1; 1751 goto out; 1752 } 1753 1754 if (!proto_drv->create_opts) { 1755 error_report("Protocol driver '%s' does not support image creation", 1756 proto_drv->format_name); 1757 ret = -1; 1758 goto out; 1759 } 1760 1761 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1762 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1763 1764 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1765 if (options) { 1766 qemu_opts_do_parse(opts, options, NULL, &local_err); 1767 if (local_err) { 1768 error_report_err(local_err); 1769 ret = -1; 1770 goto out; 1771 } 1772 } 1773 1774 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1775 &error_abort); 1776 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1777 if (ret < 0) { 1778 goto out; 1779 } 1780 } 1781 1782 /* Get backing file name if -o backing_file was used */ 1783 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1784 if (out_baseimg_param) { 1785 out_baseimg = out_baseimg_param; 1786 } 1787 1788 /* Check if compression is supported */ 1789 if (compress) { 1790 bool encryption = 1791 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1792 const char *preallocation = 1793 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1794 1795 if (!drv->bdrv_write_compressed) { 1796 error_report("Compression not supported for this file format"); 1797 ret = -1; 1798 goto out; 1799 } 1800 1801 if (encryption) { 1802 error_report("Compression and encryption not supported at " 1803 "the same time"); 1804 ret = -1; 1805 goto out; 1806 } 1807 1808 if (preallocation 1809 && strcmp(preallocation, "off")) 1810 { 1811 error_report("Compression and preallocation not supported at " 1812 "the same time"); 1813 ret = -1; 1814 goto out; 1815 } 1816 } 1817 1818 if (!skip_create) { 1819 /* Create the new image */ 1820 ret = bdrv_create(drv, out_filename, opts, &local_err); 1821 if (ret < 0) { 1822 error_reportf_err(local_err, "%s: error while converting %s: ", 1823 out_filename, out_fmt); 1824 goto out; 1825 } 1826 } 1827 1828 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1829 ret = bdrv_parse_cache_flags(cache, &flags); 1830 if (ret < 0) { 1831 error_report("Invalid cache option: %s", cache); 1832 goto out; 1833 } 1834 1835 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1836 if (!out_blk) { 1837 ret = -1; 1838 goto out; 1839 } 1840 out_bs = blk_bs(out_blk); 1841 1842 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1843 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1844 * as maximum. */ 1845 bufsectors = MIN(32768, 1846 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1847 out_bs->bl.discard_alignment)) 1848 ); 1849 1850 if (skip_create) { 1851 int64_t output_sectors = blk_nb_sectors(out_blk); 1852 if (output_sectors < 0) { 1853 error_report("unable to get output image length: %s", 1854 strerror(-output_sectors)); 1855 ret = -1; 1856 goto out; 1857 } else if (output_sectors < total_sectors) { 1858 error_report("output file is smaller than input file"); 1859 ret = -1; 1860 goto out; 1861 } 1862 } 1863 1864 cluster_sectors = 0; 1865 ret = bdrv_get_info(out_bs, &bdi); 1866 if (ret < 0) { 1867 if (compress) { 1868 error_report("could not get block driver info"); 1869 goto out; 1870 } 1871 } else { 1872 compress = compress || bdi.needs_compressed_writes; 1873 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1874 } 1875 1876 state = (ImgConvertState) { 1877 .src = blk, 1878 .src_sectors = bs_sectors, 1879 .src_num = bs_n, 1880 .total_sectors = total_sectors, 1881 .target = out_blk, 1882 .compressed = compress, 1883 .target_has_backing = (bool) out_baseimg, 1884 .min_sparse = min_sparse, 1885 .cluster_sectors = cluster_sectors, 1886 .buf_sectors = bufsectors, 1887 }; 1888 ret = convert_do_copy(&state); 1889 1890 out: 1891 if (!ret) { 1892 qemu_progress_print(100, 0); 1893 } 1894 qemu_progress_end(); 1895 qemu_opts_del(opts); 1896 qemu_opts_free(create_opts); 1897 qemu_opts_del(sn_opts); 1898 blk_unref(out_blk); 1899 g_free(bs); 1900 if (blk) { 1901 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1902 blk_unref(blk[bs_i]); 1903 } 1904 g_free(blk); 1905 } 1906 g_free(bs_sectors); 1907 fail_getopt: 1908 g_free(options); 1909 1910 if (ret) { 1911 return 1; 1912 } 1913 return 0; 1914 } 1915 1916 1917 static void dump_snapshots(BlockDriverState *bs) 1918 { 1919 QEMUSnapshotInfo *sn_tab, *sn; 1920 int nb_sns, i; 1921 1922 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1923 if (nb_sns <= 0) 1924 return; 1925 printf("Snapshot list:\n"); 1926 bdrv_snapshot_dump(fprintf, stdout, NULL); 1927 printf("\n"); 1928 for(i = 0; i < nb_sns; i++) { 1929 sn = &sn_tab[i]; 1930 bdrv_snapshot_dump(fprintf, stdout, sn); 1931 printf("\n"); 1932 } 1933 g_free(sn_tab); 1934 } 1935 1936 static void dump_json_image_info_list(ImageInfoList *list) 1937 { 1938 Error *local_err = NULL; 1939 QString *str; 1940 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1941 QObject *obj; 1942 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1943 &list, NULL, &local_err); 1944 obj = qmp_output_get_qobject(ov); 1945 str = qobject_to_json_pretty(obj); 1946 assert(str != NULL); 1947 printf("%s\n", qstring_get_str(str)); 1948 qobject_decref(obj); 1949 qmp_output_visitor_cleanup(ov); 1950 QDECREF(str); 1951 } 1952 1953 static void dump_json_image_info(ImageInfo *info) 1954 { 1955 Error *local_err = NULL; 1956 QString *str; 1957 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1958 QObject *obj; 1959 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1960 &info, NULL, &local_err); 1961 obj = qmp_output_get_qobject(ov); 1962 str = qobject_to_json_pretty(obj); 1963 assert(str != NULL); 1964 printf("%s\n", qstring_get_str(str)); 1965 qobject_decref(obj); 1966 qmp_output_visitor_cleanup(ov); 1967 QDECREF(str); 1968 } 1969 1970 static void dump_human_image_info_list(ImageInfoList *list) 1971 { 1972 ImageInfoList *elem; 1973 bool delim = false; 1974 1975 for (elem = list; elem; elem = elem->next) { 1976 if (delim) { 1977 printf("\n"); 1978 } 1979 delim = true; 1980 1981 bdrv_image_info_dump(fprintf, stdout, elem->value); 1982 } 1983 } 1984 1985 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1986 { 1987 return strcmp(a, b) == 0; 1988 } 1989 1990 /** 1991 * Open an image file chain and return an ImageInfoList 1992 * 1993 * @filename: topmost image filename 1994 * @fmt: topmost image format (may be NULL to autodetect) 1995 * @chain: true - enumerate entire backing file chain 1996 * false - only topmost image file 1997 * 1998 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1999 * image file. If there was an error a message will have been printed to 2000 * stderr. 2001 */ 2002 static ImageInfoList *collect_image_info_list(const char *filename, 2003 const char *fmt, 2004 bool chain) 2005 { 2006 ImageInfoList *head = NULL; 2007 ImageInfoList **last = &head; 2008 GHashTable *filenames; 2009 Error *err = NULL; 2010 2011 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2012 2013 while (filename) { 2014 BlockBackend *blk; 2015 BlockDriverState *bs; 2016 ImageInfo *info; 2017 ImageInfoList *elem; 2018 2019 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2020 error_report("Backing file '%s' creates an infinite loop.", 2021 filename); 2022 goto err; 2023 } 2024 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2025 2026 blk = img_open("image", filename, fmt, 2027 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2028 if (!blk) { 2029 goto err; 2030 } 2031 bs = blk_bs(blk); 2032 2033 bdrv_query_image_info(bs, &info, &err); 2034 if (err) { 2035 error_report_err(err); 2036 blk_unref(blk); 2037 goto err; 2038 } 2039 2040 elem = g_new0(ImageInfoList, 1); 2041 elem->value = info; 2042 *last = elem; 2043 last = &elem->next; 2044 2045 blk_unref(blk); 2046 2047 filename = fmt = NULL; 2048 if (chain) { 2049 if (info->has_full_backing_filename) { 2050 filename = info->full_backing_filename; 2051 } else if (info->has_backing_filename) { 2052 error_report("Could not determine absolute backing filename," 2053 " but backing filename '%s' present", 2054 info->backing_filename); 2055 goto err; 2056 } 2057 if (info->has_backing_filename_format) { 2058 fmt = info->backing_filename_format; 2059 } 2060 } 2061 } 2062 g_hash_table_destroy(filenames); 2063 return head; 2064 2065 err: 2066 qapi_free_ImageInfoList(head); 2067 g_hash_table_destroy(filenames); 2068 return NULL; 2069 } 2070 2071 static int img_info(int argc, char **argv) 2072 { 2073 int c; 2074 OutputFormat output_format = OFORMAT_HUMAN; 2075 bool chain = false; 2076 const char *filename, *fmt, *output; 2077 ImageInfoList *list; 2078 2079 fmt = NULL; 2080 output = NULL; 2081 for(;;) { 2082 int option_index = 0; 2083 static const struct option long_options[] = { 2084 {"help", no_argument, 0, 'h'}, 2085 {"format", required_argument, 0, 'f'}, 2086 {"output", required_argument, 0, OPTION_OUTPUT}, 2087 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2088 {0, 0, 0, 0} 2089 }; 2090 c = getopt_long(argc, argv, "f:h", 2091 long_options, &option_index); 2092 if (c == -1) { 2093 break; 2094 } 2095 switch(c) { 2096 case '?': 2097 case 'h': 2098 help(); 2099 break; 2100 case 'f': 2101 fmt = optarg; 2102 break; 2103 case OPTION_OUTPUT: 2104 output = optarg; 2105 break; 2106 case OPTION_BACKING_CHAIN: 2107 chain = true; 2108 break; 2109 } 2110 } 2111 if (optind != argc - 1) { 2112 error_exit("Expecting one image file name"); 2113 } 2114 filename = argv[optind++]; 2115 2116 if (output && !strcmp(output, "json")) { 2117 output_format = OFORMAT_JSON; 2118 } else if (output && !strcmp(output, "human")) { 2119 output_format = OFORMAT_HUMAN; 2120 } else if (output) { 2121 error_report("--output must be used with human or json as argument."); 2122 return 1; 2123 } 2124 2125 list = collect_image_info_list(filename, fmt, chain); 2126 if (!list) { 2127 return 1; 2128 } 2129 2130 switch (output_format) { 2131 case OFORMAT_HUMAN: 2132 dump_human_image_info_list(list); 2133 break; 2134 case OFORMAT_JSON: 2135 if (chain) { 2136 dump_json_image_info_list(list); 2137 } else { 2138 dump_json_image_info(list->value); 2139 } 2140 break; 2141 } 2142 2143 qapi_free_ImageInfoList(list); 2144 return 0; 2145 } 2146 2147 2148 typedef struct MapEntry { 2149 int flags; 2150 int depth; 2151 int64_t start; 2152 int64_t length; 2153 int64_t offset; 2154 BlockDriverState *bs; 2155 } MapEntry; 2156 2157 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2158 MapEntry *next) 2159 { 2160 switch (output_format) { 2161 case OFORMAT_HUMAN: 2162 if ((e->flags & BDRV_BLOCK_DATA) && 2163 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2164 error_report("File contains external, encrypted or compressed clusters."); 2165 exit(1); 2166 } 2167 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2168 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2169 e->start, e->length, e->offset, e->bs->filename); 2170 } 2171 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2172 * Modify the flags here to allow more coalescing. 2173 */ 2174 if (next && 2175 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2176 next->flags &= ~BDRV_BLOCK_DATA; 2177 next->flags |= BDRV_BLOCK_ZERO; 2178 } 2179 break; 2180 case OFORMAT_JSON: 2181 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2182 " \"zero\": %s, \"data\": %s", 2183 (e->start == 0 ? "[" : ",\n"), 2184 e->start, e->length, e->depth, 2185 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2186 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2187 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2188 printf(", \"offset\": %"PRId64"", e->offset); 2189 } 2190 putchar('}'); 2191 2192 if (!next) { 2193 printf("]\n"); 2194 } 2195 break; 2196 } 2197 } 2198 2199 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2200 int nb_sectors, MapEntry *e) 2201 { 2202 int64_t ret; 2203 int depth; 2204 2205 /* As an optimization, we could cache the current range of unallocated 2206 * clusters in each file of the chain, and avoid querying the same 2207 * range repeatedly. 2208 */ 2209 2210 depth = 0; 2211 for (;;) { 2212 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2213 if (ret < 0) { 2214 return ret; 2215 } 2216 assert(nb_sectors); 2217 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2218 break; 2219 } 2220 bs = backing_bs(bs); 2221 if (bs == NULL) { 2222 ret = 0; 2223 break; 2224 } 2225 2226 depth++; 2227 } 2228 2229 e->start = sector_num * BDRV_SECTOR_SIZE; 2230 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2231 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2232 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2233 e->depth = depth; 2234 e->bs = bs; 2235 return 0; 2236 } 2237 2238 static int img_map(int argc, char **argv) 2239 { 2240 int c; 2241 OutputFormat output_format = OFORMAT_HUMAN; 2242 BlockBackend *blk; 2243 BlockDriverState *bs; 2244 const char *filename, *fmt, *output; 2245 int64_t length; 2246 MapEntry curr = { .length = 0 }, next; 2247 int ret = 0; 2248 2249 fmt = NULL; 2250 output = NULL; 2251 for (;;) { 2252 int option_index = 0; 2253 static const struct option long_options[] = { 2254 {"help", no_argument, 0, 'h'}, 2255 {"format", required_argument, 0, 'f'}, 2256 {"output", required_argument, 0, OPTION_OUTPUT}, 2257 {0, 0, 0, 0} 2258 }; 2259 c = getopt_long(argc, argv, "f:h", 2260 long_options, &option_index); 2261 if (c == -1) { 2262 break; 2263 } 2264 switch (c) { 2265 case '?': 2266 case 'h': 2267 help(); 2268 break; 2269 case 'f': 2270 fmt = optarg; 2271 break; 2272 case OPTION_OUTPUT: 2273 output = optarg; 2274 break; 2275 } 2276 } 2277 if (optind != argc - 1) { 2278 error_exit("Expecting one image file name"); 2279 } 2280 filename = argv[optind]; 2281 2282 if (output && !strcmp(output, "json")) { 2283 output_format = OFORMAT_JSON; 2284 } else if (output && !strcmp(output, "human")) { 2285 output_format = OFORMAT_HUMAN; 2286 } else if (output) { 2287 error_report("--output must be used with human or json as argument."); 2288 return 1; 2289 } 2290 2291 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2292 if (!blk) { 2293 return 1; 2294 } 2295 bs = blk_bs(blk); 2296 2297 if (output_format == OFORMAT_HUMAN) { 2298 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2299 } 2300 2301 length = blk_getlength(blk); 2302 while (curr.start + curr.length < length) { 2303 int64_t nsectors_left; 2304 int64_t sector_num; 2305 int n; 2306 2307 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2308 2309 /* Probe up to 1 GiB at a time. */ 2310 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2311 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2312 ret = get_block_status(bs, sector_num, n, &next); 2313 2314 if (ret < 0) { 2315 error_report("Could not read file metadata: %s", strerror(-ret)); 2316 goto out; 2317 } 2318 2319 if (curr.length != 0 && curr.flags == next.flags && 2320 curr.depth == next.depth && 2321 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2322 curr.offset + curr.length == next.offset)) { 2323 curr.length += next.length; 2324 continue; 2325 } 2326 2327 if (curr.length > 0) { 2328 dump_map_entry(output_format, &curr, &next); 2329 } 2330 curr = next; 2331 } 2332 2333 dump_map_entry(output_format, &curr, NULL); 2334 2335 out: 2336 blk_unref(blk); 2337 return ret < 0; 2338 } 2339 2340 #define SNAPSHOT_LIST 1 2341 #define SNAPSHOT_CREATE 2 2342 #define SNAPSHOT_APPLY 3 2343 #define SNAPSHOT_DELETE 4 2344 2345 static int img_snapshot(int argc, char **argv) 2346 { 2347 BlockBackend *blk; 2348 BlockDriverState *bs; 2349 QEMUSnapshotInfo sn; 2350 char *filename, *snapshot_name = NULL; 2351 int c, ret = 0, bdrv_oflags; 2352 int action = 0; 2353 qemu_timeval tv; 2354 bool quiet = false; 2355 Error *err = NULL; 2356 2357 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2358 /* Parse commandline parameters */ 2359 for(;;) { 2360 c = getopt(argc, argv, "la:c:d:hq"); 2361 if (c == -1) { 2362 break; 2363 } 2364 switch(c) { 2365 case '?': 2366 case 'h': 2367 help(); 2368 return 0; 2369 case 'l': 2370 if (action) { 2371 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2372 return 0; 2373 } 2374 action = SNAPSHOT_LIST; 2375 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2376 break; 2377 case 'a': 2378 if (action) { 2379 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2380 return 0; 2381 } 2382 action = SNAPSHOT_APPLY; 2383 snapshot_name = optarg; 2384 break; 2385 case 'c': 2386 if (action) { 2387 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2388 return 0; 2389 } 2390 action = SNAPSHOT_CREATE; 2391 snapshot_name = optarg; 2392 break; 2393 case 'd': 2394 if (action) { 2395 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2396 return 0; 2397 } 2398 action = SNAPSHOT_DELETE; 2399 snapshot_name = optarg; 2400 break; 2401 case 'q': 2402 quiet = true; 2403 break; 2404 } 2405 } 2406 2407 if (optind != argc - 1) { 2408 error_exit("Expecting one image file name"); 2409 } 2410 filename = argv[optind++]; 2411 2412 /* Open the image */ 2413 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2414 if (!blk) { 2415 return 1; 2416 } 2417 bs = blk_bs(blk); 2418 2419 /* Perform the requested action */ 2420 switch(action) { 2421 case SNAPSHOT_LIST: 2422 dump_snapshots(bs); 2423 break; 2424 2425 case SNAPSHOT_CREATE: 2426 memset(&sn, 0, sizeof(sn)); 2427 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2428 2429 qemu_gettimeofday(&tv); 2430 sn.date_sec = tv.tv_sec; 2431 sn.date_nsec = tv.tv_usec * 1000; 2432 2433 ret = bdrv_snapshot_create(bs, &sn); 2434 if (ret) { 2435 error_report("Could not create snapshot '%s': %d (%s)", 2436 snapshot_name, ret, strerror(-ret)); 2437 } 2438 break; 2439 2440 case SNAPSHOT_APPLY: 2441 ret = bdrv_snapshot_goto(bs, snapshot_name); 2442 if (ret) { 2443 error_report("Could not apply snapshot '%s': %d (%s)", 2444 snapshot_name, ret, strerror(-ret)); 2445 } 2446 break; 2447 2448 case SNAPSHOT_DELETE: 2449 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2450 if (err) { 2451 error_reportf_err(err, "Could not delete snapshot '%s': ", 2452 snapshot_name); 2453 ret = 1; 2454 } 2455 break; 2456 } 2457 2458 /* Cleanup */ 2459 blk_unref(blk); 2460 if (ret) { 2461 return 1; 2462 } 2463 return 0; 2464 } 2465 2466 static int img_rebase(int argc, char **argv) 2467 { 2468 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2469 BlockDriverState *bs = NULL; 2470 char *filename; 2471 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2472 int c, flags, src_flags, ret; 2473 int unsafe = 0; 2474 int progress = 0; 2475 bool quiet = false; 2476 Error *local_err = NULL; 2477 2478 /* Parse commandline parameters */ 2479 fmt = NULL; 2480 cache = BDRV_DEFAULT_CACHE; 2481 src_cache = BDRV_DEFAULT_CACHE; 2482 out_baseimg = NULL; 2483 out_basefmt = NULL; 2484 for(;;) { 2485 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2486 if (c == -1) { 2487 break; 2488 } 2489 switch(c) { 2490 case '?': 2491 case 'h': 2492 help(); 2493 return 0; 2494 case 'f': 2495 fmt = optarg; 2496 break; 2497 case 'F': 2498 out_basefmt = optarg; 2499 break; 2500 case 'b': 2501 out_baseimg = optarg; 2502 break; 2503 case 'u': 2504 unsafe = 1; 2505 break; 2506 case 'p': 2507 progress = 1; 2508 break; 2509 case 't': 2510 cache = optarg; 2511 break; 2512 case 'T': 2513 src_cache = optarg; 2514 break; 2515 case 'q': 2516 quiet = true; 2517 break; 2518 } 2519 } 2520 2521 if (quiet) { 2522 progress = 0; 2523 } 2524 2525 if (optind != argc - 1) { 2526 error_exit("Expecting one image file name"); 2527 } 2528 if (!unsafe && !out_baseimg) { 2529 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2530 } 2531 filename = argv[optind++]; 2532 2533 qemu_progress_init(progress, 2.0); 2534 qemu_progress_print(0, 100); 2535 2536 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2537 ret = bdrv_parse_cache_flags(cache, &flags); 2538 if (ret < 0) { 2539 error_report("Invalid cache option: %s", cache); 2540 goto out; 2541 } 2542 2543 src_flags = BDRV_O_FLAGS; 2544 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2545 if (ret < 0) { 2546 error_report("Invalid source cache option: %s", src_cache); 2547 goto out; 2548 } 2549 2550 /* 2551 * Open the images. 2552 * 2553 * Ignore the old backing file for unsafe rebase in case we want to correct 2554 * the reference to a renamed or moved backing file. 2555 */ 2556 blk = img_open("image", filename, fmt, flags, true, quiet); 2557 if (!blk) { 2558 ret = -1; 2559 goto out; 2560 } 2561 bs = blk_bs(blk); 2562 2563 if (out_basefmt != NULL) { 2564 if (bdrv_find_format(out_basefmt) == NULL) { 2565 error_report("Invalid format name: '%s'", out_basefmt); 2566 ret = -1; 2567 goto out; 2568 } 2569 } 2570 2571 /* For safe rebasing we need to compare old and new backing file */ 2572 if (!unsafe) { 2573 char backing_name[PATH_MAX]; 2574 QDict *options = NULL; 2575 2576 if (bs->backing_format[0] != '\0') { 2577 options = qdict_new(); 2578 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2579 } 2580 2581 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2582 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2583 options, src_flags, &local_err); 2584 if (!blk_old_backing) { 2585 error_reportf_err(local_err, 2586 "Could not open old backing file '%s': ", 2587 backing_name); 2588 goto out; 2589 } 2590 2591 if (out_baseimg[0]) { 2592 if (out_basefmt) { 2593 options = qdict_new(); 2594 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2595 } else { 2596 options = NULL; 2597 } 2598 2599 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2600 options, src_flags, &local_err); 2601 if (!blk_new_backing) { 2602 error_reportf_err(local_err, 2603 "Could not open new backing file '%s': ", 2604 out_baseimg); 2605 goto out; 2606 } 2607 } 2608 } 2609 2610 /* 2611 * Check each unallocated cluster in the COW file. If it is unallocated, 2612 * accesses go to the backing file. We must therefore compare this cluster 2613 * in the old and new backing file, and if they differ we need to copy it 2614 * from the old backing file into the COW file. 2615 * 2616 * If qemu-img crashes during this step, no harm is done. The content of 2617 * the image is the same as the original one at any time. 2618 */ 2619 if (!unsafe) { 2620 int64_t num_sectors; 2621 int64_t old_backing_num_sectors; 2622 int64_t new_backing_num_sectors = 0; 2623 uint64_t sector; 2624 int n; 2625 uint8_t * buf_old; 2626 uint8_t * buf_new; 2627 float local_progress = 0; 2628 2629 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2630 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2631 2632 num_sectors = blk_nb_sectors(blk); 2633 if (num_sectors < 0) { 2634 error_report("Could not get size of '%s': %s", 2635 filename, strerror(-num_sectors)); 2636 ret = -1; 2637 goto out; 2638 } 2639 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2640 if (old_backing_num_sectors < 0) { 2641 char backing_name[PATH_MAX]; 2642 2643 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2644 error_report("Could not get size of '%s': %s", 2645 backing_name, strerror(-old_backing_num_sectors)); 2646 ret = -1; 2647 goto out; 2648 } 2649 if (blk_new_backing) { 2650 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2651 if (new_backing_num_sectors < 0) { 2652 error_report("Could not get size of '%s': %s", 2653 out_baseimg, strerror(-new_backing_num_sectors)); 2654 ret = -1; 2655 goto out; 2656 } 2657 } 2658 2659 if (num_sectors != 0) { 2660 local_progress = (float)100 / 2661 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2662 } 2663 2664 for (sector = 0; sector < num_sectors; sector += n) { 2665 2666 /* How many sectors can we handle with the next read? */ 2667 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2668 n = (IO_BUF_SIZE / 512); 2669 } else { 2670 n = num_sectors - sector; 2671 } 2672 2673 /* If the cluster is allocated, we don't need to take action */ 2674 ret = bdrv_is_allocated(bs, sector, n, &n); 2675 if (ret < 0) { 2676 error_report("error while reading image metadata: %s", 2677 strerror(-ret)); 2678 goto out; 2679 } 2680 if (ret) { 2681 continue; 2682 } 2683 2684 /* 2685 * Read old and new backing file and take into consideration that 2686 * backing files may be smaller than the COW image. 2687 */ 2688 if (sector >= old_backing_num_sectors) { 2689 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2690 } else { 2691 if (sector + n > old_backing_num_sectors) { 2692 n = old_backing_num_sectors - sector; 2693 } 2694 2695 ret = blk_read(blk_old_backing, sector, buf_old, n); 2696 if (ret < 0) { 2697 error_report("error while reading from old backing file"); 2698 goto out; 2699 } 2700 } 2701 2702 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2703 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2704 } else { 2705 if (sector + n > new_backing_num_sectors) { 2706 n = new_backing_num_sectors - sector; 2707 } 2708 2709 ret = blk_read(blk_new_backing, sector, buf_new, n); 2710 if (ret < 0) { 2711 error_report("error while reading from new backing file"); 2712 goto out; 2713 } 2714 } 2715 2716 /* If they differ, we need to write to the COW file */ 2717 uint64_t written = 0; 2718 2719 while (written < n) { 2720 int pnum; 2721 2722 if (compare_sectors(buf_old + written * 512, 2723 buf_new + written * 512, n - written, &pnum)) 2724 { 2725 ret = blk_write(blk, sector + written, 2726 buf_old + written * 512, pnum); 2727 if (ret < 0) { 2728 error_report("Error while writing to COW image: %s", 2729 strerror(-ret)); 2730 goto out; 2731 } 2732 } 2733 2734 written += pnum; 2735 } 2736 qemu_progress_print(local_progress, 100); 2737 } 2738 2739 qemu_vfree(buf_old); 2740 qemu_vfree(buf_new); 2741 } 2742 2743 /* 2744 * Change the backing file. All clusters that are different from the old 2745 * backing file are overwritten in the COW file now, so the visible content 2746 * doesn't change when we switch the backing file. 2747 */ 2748 if (out_baseimg && *out_baseimg) { 2749 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2750 } else { 2751 ret = bdrv_change_backing_file(bs, NULL, NULL); 2752 } 2753 2754 if (ret == -ENOSPC) { 2755 error_report("Could not change the backing file to '%s': No " 2756 "space left in the file header", out_baseimg); 2757 } else if (ret < 0) { 2758 error_report("Could not change the backing file to '%s': %s", 2759 out_baseimg, strerror(-ret)); 2760 } 2761 2762 qemu_progress_print(100, 0); 2763 /* 2764 * TODO At this point it is possible to check if any clusters that are 2765 * allocated in the COW file are the same in the backing file. If so, they 2766 * could be dropped from the COW file. Don't do this before switching the 2767 * backing file, in case of a crash this would lead to corruption. 2768 */ 2769 out: 2770 qemu_progress_end(); 2771 /* Cleanup */ 2772 if (!unsafe) { 2773 blk_unref(blk_old_backing); 2774 blk_unref(blk_new_backing); 2775 } 2776 2777 blk_unref(blk); 2778 if (ret) { 2779 return 1; 2780 } 2781 return 0; 2782 } 2783 2784 static int img_resize(int argc, char **argv) 2785 { 2786 Error *err = NULL; 2787 int c, ret, relative; 2788 const char *filename, *fmt, *size; 2789 int64_t n, total_size; 2790 bool quiet = false; 2791 BlockBackend *blk = NULL; 2792 QemuOpts *param; 2793 static QemuOptsList resize_options = { 2794 .name = "resize_options", 2795 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2796 .desc = { 2797 { 2798 .name = BLOCK_OPT_SIZE, 2799 .type = QEMU_OPT_SIZE, 2800 .help = "Virtual disk size" 2801 }, { 2802 /* end of list */ 2803 } 2804 }, 2805 }; 2806 2807 /* Remove size from argv manually so that negative numbers are not treated 2808 * as options by getopt. */ 2809 if (argc < 3) { 2810 error_exit("Not enough arguments"); 2811 return 1; 2812 } 2813 2814 size = argv[--argc]; 2815 2816 /* Parse getopt arguments */ 2817 fmt = NULL; 2818 for(;;) { 2819 c = getopt(argc, argv, "f:hq"); 2820 if (c == -1) { 2821 break; 2822 } 2823 switch(c) { 2824 case '?': 2825 case 'h': 2826 help(); 2827 break; 2828 case 'f': 2829 fmt = optarg; 2830 break; 2831 case 'q': 2832 quiet = true; 2833 break; 2834 } 2835 } 2836 if (optind != argc - 1) { 2837 error_exit("Expecting one image file name"); 2838 } 2839 filename = argv[optind++]; 2840 2841 /* Choose grow, shrink, or absolute resize mode */ 2842 switch (size[0]) { 2843 case '+': 2844 relative = 1; 2845 size++; 2846 break; 2847 case '-': 2848 relative = -1; 2849 size++; 2850 break; 2851 default: 2852 relative = 0; 2853 break; 2854 } 2855 2856 /* Parse size */ 2857 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2858 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2859 if (err) { 2860 error_report_err(err); 2861 ret = -1; 2862 qemu_opts_del(param); 2863 goto out; 2864 } 2865 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2866 qemu_opts_del(param); 2867 2868 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2869 true, quiet); 2870 if (!blk) { 2871 ret = -1; 2872 goto out; 2873 } 2874 2875 if (relative) { 2876 total_size = blk_getlength(blk) + n * relative; 2877 } else { 2878 total_size = n; 2879 } 2880 if (total_size <= 0) { 2881 error_report("New image size must be positive"); 2882 ret = -1; 2883 goto out; 2884 } 2885 2886 ret = blk_truncate(blk, total_size); 2887 switch (ret) { 2888 case 0: 2889 qprintf(quiet, "Image resized.\n"); 2890 break; 2891 case -ENOTSUP: 2892 error_report("This image does not support resize"); 2893 break; 2894 case -EACCES: 2895 error_report("Image is read-only"); 2896 break; 2897 default: 2898 error_report("Error resizing image (%d)", -ret); 2899 break; 2900 } 2901 out: 2902 blk_unref(blk); 2903 if (ret) { 2904 return 1; 2905 } 2906 return 0; 2907 } 2908 2909 static void amend_status_cb(BlockDriverState *bs, 2910 int64_t offset, int64_t total_work_size, 2911 void *opaque) 2912 { 2913 qemu_progress_print(100.f * offset / total_work_size, 0); 2914 } 2915 2916 static int img_amend(int argc, char **argv) 2917 { 2918 Error *err = NULL; 2919 int c, ret = 0; 2920 char *options = NULL; 2921 QemuOptsList *create_opts = NULL; 2922 QemuOpts *opts = NULL; 2923 const char *fmt = NULL, *filename, *cache; 2924 int flags; 2925 bool quiet = false, progress = false; 2926 BlockBackend *blk = NULL; 2927 BlockDriverState *bs = NULL; 2928 2929 cache = BDRV_DEFAULT_CACHE; 2930 for (;;) { 2931 c = getopt(argc, argv, "ho:f:t:pq"); 2932 if (c == -1) { 2933 break; 2934 } 2935 2936 switch (c) { 2937 case 'h': 2938 case '?': 2939 help(); 2940 break; 2941 case 'o': 2942 if (!is_valid_option_list(optarg)) { 2943 error_report("Invalid option list: %s", optarg); 2944 ret = -1; 2945 goto out_no_progress; 2946 } 2947 if (!options) { 2948 options = g_strdup(optarg); 2949 } else { 2950 char *old_options = options; 2951 options = g_strdup_printf("%s,%s", options, optarg); 2952 g_free(old_options); 2953 } 2954 break; 2955 case 'f': 2956 fmt = optarg; 2957 break; 2958 case 't': 2959 cache = optarg; 2960 break; 2961 case 'p': 2962 progress = true; 2963 break; 2964 case 'q': 2965 quiet = true; 2966 break; 2967 } 2968 } 2969 2970 if (!options) { 2971 error_exit("Must specify options (-o)"); 2972 } 2973 2974 if (quiet) { 2975 progress = false; 2976 } 2977 qemu_progress_init(progress, 1.0); 2978 2979 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2980 if (fmt && has_help_option(options)) { 2981 /* If a format is explicitly specified (and possibly no filename is 2982 * given), print option help here */ 2983 ret = print_block_option_help(filename, fmt); 2984 goto out; 2985 } 2986 2987 if (optind != argc - 1) { 2988 error_report("Expecting one image file name"); 2989 ret = -1; 2990 goto out; 2991 } 2992 2993 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2994 ret = bdrv_parse_cache_flags(cache, &flags); 2995 if (ret < 0) { 2996 error_report("Invalid cache option: %s", cache); 2997 goto out; 2998 } 2999 3000 blk = img_open("image", filename, fmt, flags, true, quiet); 3001 if (!blk) { 3002 ret = -1; 3003 goto out; 3004 } 3005 bs = blk_bs(blk); 3006 3007 fmt = bs->drv->format_name; 3008 3009 if (has_help_option(options)) { 3010 /* If the format was auto-detected, print option help here */ 3011 ret = print_block_option_help(filename, fmt); 3012 goto out; 3013 } 3014 3015 if (!bs->drv->create_opts) { 3016 error_report("Format driver '%s' does not support any options to amend", 3017 fmt); 3018 ret = -1; 3019 goto out; 3020 } 3021 3022 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3023 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3024 if (options) { 3025 qemu_opts_do_parse(opts, options, NULL, &err); 3026 if (err) { 3027 error_report_err(err); 3028 ret = -1; 3029 goto out; 3030 } 3031 } 3032 3033 /* In case the driver does not call amend_status_cb() */ 3034 qemu_progress_print(0.f, 0); 3035 ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); 3036 qemu_progress_print(100.f, 0); 3037 if (ret < 0) { 3038 error_report("Error while amending options: %s", strerror(-ret)); 3039 goto out; 3040 } 3041 3042 out: 3043 qemu_progress_end(); 3044 3045 out_no_progress: 3046 blk_unref(blk); 3047 qemu_opts_del(opts); 3048 qemu_opts_free(create_opts); 3049 g_free(options); 3050 3051 if (ret) { 3052 return 1; 3053 } 3054 return 0; 3055 } 3056 3057 static const img_cmd_t img_cmds[] = { 3058 #define DEF(option, callback, arg_string) \ 3059 { option, callback }, 3060 #include "qemu-img-cmds.h" 3061 #undef DEF 3062 #undef GEN_DOCS 3063 { NULL, NULL, }, 3064 }; 3065 3066 int main(int argc, char **argv) 3067 { 3068 const img_cmd_t *cmd; 3069 const char *cmdname; 3070 Error *local_error = NULL; 3071 int c; 3072 static const struct option long_options[] = { 3073 {"help", no_argument, 0, 'h'}, 3074 {"version", no_argument, 0, 'v'}, 3075 {0, 0, 0, 0} 3076 }; 3077 3078 #ifdef CONFIG_POSIX 3079 signal(SIGPIPE, SIG_IGN); 3080 #endif 3081 3082 error_set_progname(argv[0]); 3083 qemu_init_exec_dir(argv[0]); 3084 3085 if (qemu_init_main_loop(&local_error)) { 3086 error_report_err(local_error); 3087 exit(EXIT_FAILURE); 3088 } 3089 3090 bdrv_init(); 3091 if (argc < 2) { 3092 error_exit("Not enough arguments"); 3093 } 3094 cmdname = argv[1]; 3095 3096 /* find the command */ 3097 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3098 if (!strcmp(cmdname, cmd->name)) { 3099 return cmd->handler(argc - 1, argv + 1); 3100 } 3101 } 3102 3103 c = getopt_long(argc, argv, "h", long_options, NULL); 3104 3105 if (c == 'h') { 3106 help(); 3107 } 3108 if (c == 'v') { 3109 printf(QEMU_IMG_VERSION); 3110 return 0; 3111 } 3112 3113 /* not found */ 3114 error_exit("Command not found: %s", cmdname); 3115 } 3116