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 BlockDriverState *file; 1076 1077 nb_sectors = sectors_to_process(total_sectors, sector_num); 1078 if (nb_sectors <= 0) { 1079 break; 1080 } 1081 status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, 1082 total_sectors1 - sector_num, 1083 &pnum1, &file); 1084 if (status1 < 0) { 1085 ret = 3; 1086 error_report("Sector allocation test failed for %s", filename1); 1087 goto out; 1088 } 1089 allocated1 = status1 & BDRV_BLOCK_ALLOCATED; 1090 1091 status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, 1092 total_sectors2 - sector_num, 1093 &pnum2, &file); 1094 if (status2 < 0) { 1095 ret = 3; 1096 error_report("Sector allocation test failed for %s", filename2); 1097 goto out; 1098 } 1099 allocated2 = status2 & BDRV_BLOCK_ALLOCATED; 1100 if (pnum1) { 1101 nb_sectors = MIN(nb_sectors, pnum1); 1102 } 1103 if (pnum2) { 1104 nb_sectors = MIN(nb_sectors, pnum2); 1105 } 1106 1107 if (strict) { 1108 if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != 1109 (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { 1110 ret = 1; 1111 qprintf(quiet, "Strict mode: Offset %" PRId64 1112 " block status mismatch!\n", 1113 sectors_to_bytes(sector_num)); 1114 goto out; 1115 } 1116 } 1117 if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { 1118 nb_sectors = MIN(pnum1, pnum2); 1119 } else if (allocated1 == allocated2) { 1120 if (allocated1) { 1121 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1122 if (ret < 0) { 1123 error_report("Error while reading offset %" PRId64 " of %s:" 1124 " %s", sectors_to_bytes(sector_num), filename1, 1125 strerror(-ret)); 1126 ret = 4; 1127 goto out; 1128 } 1129 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1130 if (ret < 0) { 1131 error_report("Error while reading offset %" PRId64 1132 " of %s: %s", sectors_to_bytes(sector_num), 1133 filename2, strerror(-ret)); 1134 ret = 4; 1135 goto out; 1136 } 1137 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1138 if (ret || pnum != nb_sectors) { 1139 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1140 sectors_to_bytes( 1141 ret ? sector_num : sector_num + pnum)); 1142 ret = 1; 1143 goto out; 1144 } 1145 } 1146 } else { 1147 1148 if (allocated1) { 1149 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1150 filename1, buf1, quiet); 1151 } else { 1152 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1153 filename2, buf1, quiet); 1154 } 1155 if (ret) { 1156 if (ret < 0) { 1157 error_report("Error while reading offset %" PRId64 ": %s", 1158 sectors_to_bytes(sector_num), strerror(-ret)); 1159 ret = 4; 1160 } 1161 goto out; 1162 } 1163 } 1164 sector_num += nb_sectors; 1165 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1166 } 1167 1168 if (total_sectors1 != total_sectors2) { 1169 BlockBackend *blk_over; 1170 int64_t total_sectors_over; 1171 const char *filename_over; 1172 1173 qprintf(quiet, "Warning: Image size mismatch!\n"); 1174 if (total_sectors1 > total_sectors2) { 1175 total_sectors_over = total_sectors1; 1176 blk_over = blk1; 1177 filename_over = filename1; 1178 } else { 1179 total_sectors_over = total_sectors2; 1180 blk_over = blk2; 1181 filename_over = filename2; 1182 } 1183 1184 for (;;) { 1185 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1186 if (nb_sectors <= 0) { 1187 break; 1188 } 1189 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1190 nb_sectors, &pnum); 1191 if (ret < 0) { 1192 ret = 3; 1193 error_report("Sector allocation test failed for %s", 1194 filename_over); 1195 goto out; 1196 1197 } 1198 nb_sectors = pnum; 1199 if (ret) { 1200 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1201 filename_over, buf1, quiet); 1202 if (ret) { 1203 if (ret < 0) { 1204 error_report("Error while reading offset %" PRId64 1205 " of %s: %s", sectors_to_bytes(sector_num), 1206 filename_over, strerror(-ret)); 1207 ret = 4; 1208 } 1209 goto out; 1210 } 1211 } 1212 sector_num += nb_sectors; 1213 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1214 } 1215 } 1216 1217 qprintf(quiet, "Images are identical.\n"); 1218 ret = 0; 1219 1220 out: 1221 qemu_vfree(buf1); 1222 qemu_vfree(buf2); 1223 blk_unref(blk2); 1224 out2: 1225 blk_unref(blk1); 1226 out3: 1227 qemu_progress_end(); 1228 return ret; 1229 } 1230 1231 enum ImgConvertBlockStatus { 1232 BLK_DATA, 1233 BLK_ZERO, 1234 BLK_BACKING_FILE, 1235 }; 1236 1237 typedef struct ImgConvertState { 1238 BlockBackend **src; 1239 int64_t *src_sectors; 1240 int src_cur, src_num; 1241 int64_t src_cur_offset; 1242 int64_t total_sectors; 1243 int64_t allocated_sectors; 1244 enum ImgConvertBlockStatus status; 1245 int64_t sector_next_status; 1246 BlockBackend *target; 1247 bool has_zero_init; 1248 bool compressed; 1249 bool target_has_backing; 1250 int min_sparse; 1251 size_t cluster_sectors; 1252 size_t buf_sectors; 1253 } ImgConvertState; 1254 1255 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1256 { 1257 assert(sector_num >= s->src_cur_offset); 1258 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1259 s->src_cur_offset += s->src_sectors[s->src_cur]; 1260 s->src_cur++; 1261 assert(s->src_cur < s->src_num); 1262 } 1263 } 1264 1265 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1266 { 1267 int64_t ret; 1268 int n; 1269 1270 convert_select_part(s, sector_num); 1271 1272 assert(s->total_sectors > sector_num); 1273 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1274 1275 if (s->sector_next_status <= sector_num) { 1276 BlockDriverState *file; 1277 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1278 sector_num - s->src_cur_offset, 1279 n, &n, &file); 1280 if (ret < 0) { 1281 return ret; 1282 } 1283 1284 if (ret & BDRV_BLOCK_ZERO) { 1285 s->status = BLK_ZERO; 1286 } else if (ret & BDRV_BLOCK_DATA) { 1287 s->status = BLK_DATA; 1288 } else if (!s->target_has_backing) { 1289 /* Without a target backing file we must copy over the contents of 1290 * the backing file as well. */ 1291 /* TODO Check block status of the backing file chain to avoid 1292 * needlessly reading zeroes and limiting the iteration to the 1293 * buffer size */ 1294 s->status = BLK_DATA; 1295 } else { 1296 s->status = BLK_BACKING_FILE; 1297 } 1298 1299 s->sector_next_status = sector_num + n; 1300 } 1301 1302 n = MIN(n, s->sector_next_status - sector_num); 1303 if (s->status == BLK_DATA) { 1304 n = MIN(n, s->buf_sectors); 1305 } 1306 1307 /* We need to write complete clusters for compressed images, so if an 1308 * unallocated area is shorter than that, we must consider the whole 1309 * cluster allocated. */ 1310 if (s->compressed) { 1311 if (n < s->cluster_sectors) { 1312 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1313 s->status = BLK_DATA; 1314 } else { 1315 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1316 } 1317 } 1318 1319 return n; 1320 } 1321 1322 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1323 uint8_t *buf) 1324 { 1325 int n; 1326 int ret; 1327 1328 if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { 1329 return 0; 1330 } 1331 1332 assert(nb_sectors <= s->buf_sectors); 1333 while (nb_sectors > 0) { 1334 BlockBackend *blk; 1335 int64_t bs_sectors; 1336 1337 /* In the case of compression with multiple source files, we can get a 1338 * nb_sectors that spreads into the next part. So we must be able to 1339 * read across multiple BDSes for one convert_read() call. */ 1340 convert_select_part(s, sector_num); 1341 blk = s->src[s->src_cur]; 1342 bs_sectors = s->src_sectors[s->src_cur]; 1343 1344 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1345 ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); 1346 if (ret < 0) { 1347 return ret; 1348 } 1349 1350 sector_num += n; 1351 nb_sectors -= n; 1352 buf += n * BDRV_SECTOR_SIZE; 1353 } 1354 1355 return 0; 1356 } 1357 1358 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1359 const uint8_t *buf) 1360 { 1361 int ret; 1362 1363 while (nb_sectors > 0) { 1364 int n = nb_sectors; 1365 1366 switch (s->status) { 1367 case BLK_BACKING_FILE: 1368 /* If we have a backing file, leave clusters unallocated that are 1369 * unallocated in the source image, so that the backing file is 1370 * visible at the respective offset. */ 1371 assert(s->target_has_backing); 1372 break; 1373 1374 case BLK_DATA: 1375 /* We must always write compressed clusters as a whole, so don't 1376 * try to find zeroed parts in the buffer. We can only save the 1377 * write if the buffer is completely zeroed and we're allowed to 1378 * keep the target sparse. */ 1379 if (s->compressed) { 1380 if (s->has_zero_init && s->min_sparse && 1381 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1382 { 1383 assert(!s->target_has_backing); 1384 break; 1385 } 1386 1387 ret = blk_write_compressed(s->target, sector_num, buf, n); 1388 if (ret < 0) { 1389 return ret; 1390 } 1391 break; 1392 } 1393 1394 /* If there is real non-zero data or we're told to keep the target 1395 * fully allocated (-S 0), we must write it. Otherwise we can treat 1396 * it as zero sectors. */ 1397 if (!s->min_sparse || 1398 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1399 { 1400 ret = blk_write(s->target, sector_num, buf, n); 1401 if (ret < 0) { 1402 return ret; 1403 } 1404 break; 1405 } 1406 /* fall-through */ 1407 1408 case BLK_ZERO: 1409 if (s->has_zero_init) { 1410 break; 1411 } 1412 ret = blk_write_zeroes(s->target, sector_num, n, 0); 1413 if (ret < 0) { 1414 return ret; 1415 } 1416 break; 1417 } 1418 1419 sector_num += n; 1420 nb_sectors -= n; 1421 buf += n * BDRV_SECTOR_SIZE; 1422 } 1423 1424 return 0; 1425 } 1426 1427 static int convert_do_copy(ImgConvertState *s) 1428 { 1429 uint8_t *buf = NULL; 1430 int64_t sector_num, allocated_done; 1431 int ret; 1432 int n; 1433 1434 /* Check whether we have zero initialisation or can get it efficiently */ 1435 s->has_zero_init = s->min_sparse && !s->target_has_backing 1436 ? bdrv_has_zero_init(blk_bs(s->target)) 1437 : false; 1438 1439 if (!s->has_zero_init && !s->target_has_backing && 1440 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1441 { 1442 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1443 if (ret == 0) { 1444 s->has_zero_init = true; 1445 } 1446 } 1447 1448 /* Allocate buffer for copied data. For compressed images, only one cluster 1449 * can be copied at a time. */ 1450 if (s->compressed) { 1451 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1452 error_report("invalid cluster size"); 1453 ret = -EINVAL; 1454 goto fail; 1455 } 1456 s->buf_sectors = s->cluster_sectors; 1457 } 1458 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1459 1460 /* Calculate allocated sectors for progress */ 1461 s->allocated_sectors = 0; 1462 sector_num = 0; 1463 while (sector_num < s->total_sectors) { 1464 n = convert_iteration_sectors(s, sector_num); 1465 if (n < 0) { 1466 ret = n; 1467 goto fail; 1468 } 1469 if (s->status == BLK_DATA) { 1470 s->allocated_sectors += n; 1471 } 1472 sector_num += n; 1473 } 1474 1475 /* Do the copy */ 1476 s->src_cur = 0; 1477 s->src_cur_offset = 0; 1478 s->sector_next_status = 0; 1479 1480 sector_num = 0; 1481 allocated_done = 0; 1482 1483 while (sector_num < s->total_sectors) { 1484 n = convert_iteration_sectors(s, sector_num); 1485 if (n < 0) { 1486 ret = n; 1487 goto fail; 1488 } 1489 if (s->status == BLK_DATA) { 1490 allocated_done += n; 1491 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1492 0); 1493 } 1494 1495 ret = convert_read(s, sector_num, n, buf); 1496 if (ret < 0) { 1497 error_report("error while reading sector %" PRId64 1498 ": %s", sector_num, strerror(-ret)); 1499 goto fail; 1500 } 1501 1502 ret = convert_write(s, sector_num, n, buf); 1503 if (ret < 0) { 1504 error_report("error while writing sector %" PRId64 1505 ": %s", sector_num, strerror(-ret)); 1506 goto fail; 1507 } 1508 1509 sector_num += n; 1510 } 1511 1512 if (s->compressed) { 1513 /* signal EOF to align */ 1514 ret = blk_write_compressed(s->target, 0, NULL, 0); 1515 if (ret < 0) { 1516 goto fail; 1517 } 1518 } 1519 1520 ret = 0; 1521 fail: 1522 qemu_vfree(buf); 1523 return ret; 1524 } 1525 1526 static int img_convert(int argc, char **argv) 1527 { 1528 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1529 int64_t ret = 0; 1530 int progress = 0, flags, src_flags; 1531 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1532 BlockDriver *drv, *proto_drv; 1533 BlockBackend **blk = NULL, *out_blk = NULL; 1534 BlockDriverState **bs = NULL, *out_bs = NULL; 1535 int64_t total_sectors; 1536 int64_t *bs_sectors = NULL; 1537 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1538 BlockDriverInfo bdi; 1539 QemuOpts *opts = NULL; 1540 QemuOptsList *create_opts = NULL; 1541 const char *out_baseimg_param; 1542 char *options = NULL; 1543 const char *snapshot_name = NULL; 1544 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1545 bool quiet = false; 1546 Error *local_err = NULL; 1547 QemuOpts *sn_opts = NULL; 1548 ImgConvertState state; 1549 1550 fmt = NULL; 1551 out_fmt = "raw"; 1552 cache = "unsafe"; 1553 src_cache = BDRV_DEFAULT_CACHE; 1554 out_baseimg = NULL; 1555 compress = 0; 1556 skip_create = 0; 1557 for(;;) { 1558 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1559 if (c == -1) { 1560 break; 1561 } 1562 switch(c) { 1563 case '?': 1564 case 'h': 1565 help(); 1566 break; 1567 case 'f': 1568 fmt = optarg; 1569 break; 1570 case 'O': 1571 out_fmt = optarg; 1572 break; 1573 case 'B': 1574 out_baseimg = optarg; 1575 break; 1576 case 'c': 1577 compress = 1; 1578 break; 1579 case 'e': 1580 error_report("option -e is deprecated, please use \'-o " 1581 "encryption\' instead!"); 1582 ret = -1; 1583 goto fail_getopt; 1584 case '6': 1585 error_report("option -6 is deprecated, please use \'-o " 1586 "compat6\' instead!"); 1587 ret = -1; 1588 goto fail_getopt; 1589 case 'o': 1590 if (!is_valid_option_list(optarg)) { 1591 error_report("Invalid option list: %s", optarg); 1592 ret = -1; 1593 goto fail_getopt; 1594 } 1595 if (!options) { 1596 options = g_strdup(optarg); 1597 } else { 1598 char *old_options = options; 1599 options = g_strdup_printf("%s,%s", options, optarg); 1600 g_free(old_options); 1601 } 1602 break; 1603 case 's': 1604 snapshot_name = optarg; 1605 break; 1606 case 'l': 1607 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1608 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1609 optarg, false); 1610 if (!sn_opts) { 1611 error_report("Failed in parsing snapshot param '%s'", 1612 optarg); 1613 ret = -1; 1614 goto fail_getopt; 1615 } 1616 } else { 1617 snapshot_name = optarg; 1618 } 1619 break; 1620 case 'S': 1621 { 1622 int64_t sval; 1623 char *end; 1624 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 1625 if (sval < 0 || *end) { 1626 error_report("Invalid minimum zero buffer size for sparse output specified"); 1627 ret = -1; 1628 goto fail_getopt; 1629 } 1630 1631 min_sparse = sval / BDRV_SECTOR_SIZE; 1632 break; 1633 } 1634 case 'p': 1635 progress = 1; 1636 break; 1637 case 't': 1638 cache = optarg; 1639 break; 1640 case 'T': 1641 src_cache = optarg; 1642 break; 1643 case 'q': 1644 quiet = true; 1645 break; 1646 case 'n': 1647 skip_create = 1; 1648 break; 1649 } 1650 } 1651 1652 /* Initialize before goto out */ 1653 if (quiet) { 1654 progress = 0; 1655 } 1656 qemu_progress_init(progress, 1.0); 1657 1658 1659 bs_n = argc - optind - 1; 1660 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1661 1662 if (options && has_help_option(options)) { 1663 ret = print_block_option_help(out_filename, out_fmt); 1664 goto out; 1665 } 1666 1667 if (bs_n < 1) { 1668 error_exit("Must specify image file name"); 1669 } 1670 1671 1672 if (bs_n > 1 && out_baseimg) { 1673 error_report("-B makes no sense when concatenating multiple input " 1674 "images"); 1675 ret = -1; 1676 goto out; 1677 } 1678 1679 src_flags = BDRV_O_FLAGS; 1680 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1681 if (ret < 0) { 1682 error_report("Invalid source cache option: %s", src_cache); 1683 goto out; 1684 } 1685 1686 qemu_progress_print(0, 100); 1687 1688 blk = g_new0(BlockBackend *, bs_n); 1689 bs = g_new0(BlockDriverState *, bs_n); 1690 bs_sectors = g_new(int64_t, bs_n); 1691 1692 total_sectors = 0; 1693 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1694 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1695 : g_strdup("source"); 1696 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1697 true, quiet); 1698 g_free(id); 1699 if (!blk[bs_i]) { 1700 ret = -1; 1701 goto out; 1702 } 1703 bs[bs_i] = blk_bs(blk[bs_i]); 1704 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1705 if (bs_sectors[bs_i] < 0) { 1706 error_report("Could not get size of %s: %s", 1707 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1708 ret = -1; 1709 goto out; 1710 } 1711 total_sectors += bs_sectors[bs_i]; 1712 } 1713 1714 if (sn_opts) { 1715 ret = bdrv_snapshot_load_tmp(bs[0], 1716 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1717 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1718 &local_err); 1719 } else if (snapshot_name != NULL) { 1720 if (bs_n > 1) { 1721 error_report("No support for concatenating multiple snapshot"); 1722 ret = -1; 1723 goto out; 1724 } 1725 1726 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1727 } 1728 if (local_err) { 1729 error_reportf_err(local_err, "Failed to load snapshot: "); 1730 ret = -1; 1731 goto out; 1732 } 1733 1734 /* Find driver and parse its options */ 1735 drv = bdrv_find_format(out_fmt); 1736 if (!drv) { 1737 error_report("Unknown file format '%s'", out_fmt); 1738 ret = -1; 1739 goto out; 1740 } 1741 1742 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1743 if (!proto_drv) { 1744 error_report_err(local_err); 1745 ret = -1; 1746 goto out; 1747 } 1748 1749 if (!skip_create) { 1750 if (!drv->create_opts) { 1751 error_report("Format driver '%s' does not support image creation", 1752 drv->format_name); 1753 ret = -1; 1754 goto out; 1755 } 1756 1757 if (!proto_drv->create_opts) { 1758 error_report("Protocol driver '%s' does not support image creation", 1759 proto_drv->format_name); 1760 ret = -1; 1761 goto out; 1762 } 1763 1764 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1765 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1766 1767 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1768 if (options) { 1769 qemu_opts_do_parse(opts, options, NULL, &local_err); 1770 if (local_err) { 1771 error_report_err(local_err); 1772 ret = -1; 1773 goto out; 1774 } 1775 } 1776 1777 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1778 &error_abort); 1779 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1780 if (ret < 0) { 1781 goto out; 1782 } 1783 } 1784 1785 /* Get backing file name if -o backing_file was used */ 1786 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1787 if (out_baseimg_param) { 1788 out_baseimg = out_baseimg_param; 1789 } 1790 1791 /* Check if compression is supported */ 1792 if (compress) { 1793 bool encryption = 1794 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1795 const char *preallocation = 1796 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1797 1798 if (!drv->bdrv_write_compressed) { 1799 error_report("Compression not supported for this file format"); 1800 ret = -1; 1801 goto out; 1802 } 1803 1804 if (encryption) { 1805 error_report("Compression and encryption not supported at " 1806 "the same time"); 1807 ret = -1; 1808 goto out; 1809 } 1810 1811 if (preallocation 1812 && strcmp(preallocation, "off")) 1813 { 1814 error_report("Compression and preallocation not supported at " 1815 "the same time"); 1816 ret = -1; 1817 goto out; 1818 } 1819 } 1820 1821 if (!skip_create) { 1822 /* Create the new image */ 1823 ret = bdrv_create(drv, out_filename, opts, &local_err); 1824 if (ret < 0) { 1825 error_reportf_err(local_err, "%s: error while converting %s: ", 1826 out_filename, out_fmt); 1827 goto out; 1828 } 1829 } 1830 1831 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1832 ret = bdrv_parse_cache_flags(cache, &flags); 1833 if (ret < 0) { 1834 error_report("Invalid cache option: %s", cache); 1835 goto out; 1836 } 1837 1838 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1839 if (!out_blk) { 1840 ret = -1; 1841 goto out; 1842 } 1843 out_bs = blk_bs(out_blk); 1844 1845 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1846 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1847 * as maximum. */ 1848 bufsectors = MIN(32768, 1849 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1850 out_bs->bl.discard_alignment)) 1851 ); 1852 1853 if (skip_create) { 1854 int64_t output_sectors = blk_nb_sectors(out_blk); 1855 if (output_sectors < 0) { 1856 error_report("unable to get output image length: %s", 1857 strerror(-output_sectors)); 1858 ret = -1; 1859 goto out; 1860 } else if (output_sectors < total_sectors) { 1861 error_report("output file is smaller than input file"); 1862 ret = -1; 1863 goto out; 1864 } 1865 } 1866 1867 cluster_sectors = 0; 1868 ret = bdrv_get_info(out_bs, &bdi); 1869 if (ret < 0) { 1870 if (compress) { 1871 error_report("could not get block driver info"); 1872 goto out; 1873 } 1874 } else { 1875 compress = compress || bdi.needs_compressed_writes; 1876 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1877 } 1878 1879 state = (ImgConvertState) { 1880 .src = blk, 1881 .src_sectors = bs_sectors, 1882 .src_num = bs_n, 1883 .total_sectors = total_sectors, 1884 .target = out_blk, 1885 .compressed = compress, 1886 .target_has_backing = (bool) out_baseimg, 1887 .min_sparse = min_sparse, 1888 .cluster_sectors = cluster_sectors, 1889 .buf_sectors = bufsectors, 1890 }; 1891 ret = convert_do_copy(&state); 1892 1893 out: 1894 if (!ret) { 1895 qemu_progress_print(100, 0); 1896 } 1897 qemu_progress_end(); 1898 qemu_opts_del(opts); 1899 qemu_opts_free(create_opts); 1900 qemu_opts_del(sn_opts); 1901 blk_unref(out_blk); 1902 g_free(bs); 1903 if (blk) { 1904 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1905 blk_unref(blk[bs_i]); 1906 } 1907 g_free(blk); 1908 } 1909 g_free(bs_sectors); 1910 fail_getopt: 1911 g_free(options); 1912 1913 if (ret) { 1914 return 1; 1915 } 1916 return 0; 1917 } 1918 1919 1920 static void dump_snapshots(BlockDriverState *bs) 1921 { 1922 QEMUSnapshotInfo *sn_tab, *sn; 1923 int nb_sns, i; 1924 1925 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1926 if (nb_sns <= 0) 1927 return; 1928 printf("Snapshot list:\n"); 1929 bdrv_snapshot_dump(fprintf, stdout, NULL); 1930 printf("\n"); 1931 for(i = 0; i < nb_sns; i++) { 1932 sn = &sn_tab[i]; 1933 bdrv_snapshot_dump(fprintf, stdout, sn); 1934 printf("\n"); 1935 } 1936 g_free(sn_tab); 1937 } 1938 1939 static void dump_json_image_info_list(ImageInfoList *list) 1940 { 1941 Error *local_err = NULL; 1942 QString *str; 1943 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1944 QObject *obj; 1945 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1946 &list, NULL, &local_err); 1947 obj = qmp_output_get_qobject(ov); 1948 str = qobject_to_json_pretty(obj); 1949 assert(str != NULL); 1950 printf("%s\n", qstring_get_str(str)); 1951 qobject_decref(obj); 1952 qmp_output_visitor_cleanup(ov); 1953 QDECREF(str); 1954 } 1955 1956 static void dump_json_image_info(ImageInfo *info) 1957 { 1958 Error *local_err = NULL; 1959 QString *str; 1960 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1961 QObject *obj; 1962 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1963 &info, NULL, &local_err); 1964 obj = qmp_output_get_qobject(ov); 1965 str = qobject_to_json_pretty(obj); 1966 assert(str != NULL); 1967 printf("%s\n", qstring_get_str(str)); 1968 qobject_decref(obj); 1969 qmp_output_visitor_cleanup(ov); 1970 QDECREF(str); 1971 } 1972 1973 static void dump_human_image_info_list(ImageInfoList *list) 1974 { 1975 ImageInfoList *elem; 1976 bool delim = false; 1977 1978 for (elem = list; elem; elem = elem->next) { 1979 if (delim) { 1980 printf("\n"); 1981 } 1982 delim = true; 1983 1984 bdrv_image_info_dump(fprintf, stdout, elem->value); 1985 } 1986 } 1987 1988 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1989 { 1990 return strcmp(a, b) == 0; 1991 } 1992 1993 /** 1994 * Open an image file chain and return an ImageInfoList 1995 * 1996 * @filename: topmost image filename 1997 * @fmt: topmost image format (may be NULL to autodetect) 1998 * @chain: true - enumerate entire backing file chain 1999 * false - only topmost image file 2000 * 2001 * Returns a list of ImageInfo objects or NULL if there was an error opening an 2002 * image file. If there was an error a message will have been printed to 2003 * stderr. 2004 */ 2005 static ImageInfoList *collect_image_info_list(const char *filename, 2006 const char *fmt, 2007 bool chain) 2008 { 2009 ImageInfoList *head = NULL; 2010 ImageInfoList **last = &head; 2011 GHashTable *filenames; 2012 Error *err = NULL; 2013 2014 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2015 2016 while (filename) { 2017 BlockBackend *blk; 2018 BlockDriverState *bs; 2019 ImageInfo *info; 2020 ImageInfoList *elem; 2021 2022 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2023 error_report("Backing file '%s' creates an infinite loop.", 2024 filename); 2025 goto err; 2026 } 2027 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2028 2029 blk = img_open("image", filename, fmt, 2030 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2031 if (!blk) { 2032 goto err; 2033 } 2034 bs = blk_bs(blk); 2035 2036 bdrv_query_image_info(bs, &info, &err); 2037 if (err) { 2038 error_report_err(err); 2039 blk_unref(blk); 2040 goto err; 2041 } 2042 2043 elem = g_new0(ImageInfoList, 1); 2044 elem->value = info; 2045 *last = elem; 2046 last = &elem->next; 2047 2048 blk_unref(blk); 2049 2050 filename = fmt = NULL; 2051 if (chain) { 2052 if (info->has_full_backing_filename) { 2053 filename = info->full_backing_filename; 2054 } else if (info->has_backing_filename) { 2055 error_report("Could not determine absolute backing filename," 2056 " but backing filename '%s' present", 2057 info->backing_filename); 2058 goto err; 2059 } 2060 if (info->has_backing_filename_format) { 2061 fmt = info->backing_filename_format; 2062 } 2063 } 2064 } 2065 g_hash_table_destroy(filenames); 2066 return head; 2067 2068 err: 2069 qapi_free_ImageInfoList(head); 2070 g_hash_table_destroy(filenames); 2071 return NULL; 2072 } 2073 2074 static int img_info(int argc, char **argv) 2075 { 2076 int c; 2077 OutputFormat output_format = OFORMAT_HUMAN; 2078 bool chain = false; 2079 const char *filename, *fmt, *output; 2080 ImageInfoList *list; 2081 2082 fmt = NULL; 2083 output = NULL; 2084 for(;;) { 2085 int option_index = 0; 2086 static const struct option long_options[] = { 2087 {"help", no_argument, 0, 'h'}, 2088 {"format", required_argument, 0, 'f'}, 2089 {"output", required_argument, 0, OPTION_OUTPUT}, 2090 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2091 {0, 0, 0, 0} 2092 }; 2093 c = getopt_long(argc, argv, "f:h", 2094 long_options, &option_index); 2095 if (c == -1) { 2096 break; 2097 } 2098 switch(c) { 2099 case '?': 2100 case 'h': 2101 help(); 2102 break; 2103 case 'f': 2104 fmt = optarg; 2105 break; 2106 case OPTION_OUTPUT: 2107 output = optarg; 2108 break; 2109 case OPTION_BACKING_CHAIN: 2110 chain = true; 2111 break; 2112 } 2113 } 2114 if (optind != argc - 1) { 2115 error_exit("Expecting one image file name"); 2116 } 2117 filename = argv[optind++]; 2118 2119 if (output && !strcmp(output, "json")) { 2120 output_format = OFORMAT_JSON; 2121 } else if (output && !strcmp(output, "human")) { 2122 output_format = OFORMAT_HUMAN; 2123 } else if (output) { 2124 error_report("--output must be used with human or json as argument."); 2125 return 1; 2126 } 2127 2128 list = collect_image_info_list(filename, fmt, chain); 2129 if (!list) { 2130 return 1; 2131 } 2132 2133 switch (output_format) { 2134 case OFORMAT_HUMAN: 2135 dump_human_image_info_list(list); 2136 break; 2137 case OFORMAT_JSON: 2138 if (chain) { 2139 dump_json_image_info_list(list); 2140 } else { 2141 dump_json_image_info(list->value); 2142 } 2143 break; 2144 } 2145 2146 qapi_free_ImageInfoList(list); 2147 return 0; 2148 } 2149 2150 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2151 MapEntry *next) 2152 { 2153 switch (output_format) { 2154 case OFORMAT_HUMAN: 2155 if (e->data && !e->has_offset) { 2156 error_report("File contains external, encrypted or compressed clusters."); 2157 exit(1); 2158 } 2159 if (e->data && !e->zero) { 2160 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2161 e->start, e->length, 2162 e->has_offset ? e->offset : 0, 2163 e->has_filename ? e->filename : ""); 2164 } 2165 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2166 * Modify the flags here to allow more coalescing. 2167 */ 2168 if (next && (!next->data || next->zero)) { 2169 next->data = false; 2170 next->zero = true; 2171 } 2172 break; 2173 case OFORMAT_JSON: 2174 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," 2175 " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", 2176 (e->start == 0 ? "[" : ",\n"), 2177 e->start, e->length, e->depth, 2178 e->zero ? "true" : "false", 2179 e->data ? "true" : "false"); 2180 if (e->has_offset) { 2181 printf(", \"offset\": %"PRId64"", e->offset); 2182 } 2183 putchar('}'); 2184 2185 if (!next) { 2186 printf("]\n"); 2187 } 2188 break; 2189 } 2190 } 2191 2192 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2193 int nb_sectors, MapEntry *e) 2194 { 2195 int64_t ret; 2196 int depth; 2197 BlockDriverState *file; 2198 2199 /* As an optimization, we could cache the current range of unallocated 2200 * clusters in each file of the chain, and avoid querying the same 2201 * range repeatedly. 2202 */ 2203 2204 depth = 0; 2205 for (;;) { 2206 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors, 2207 &file); 2208 if (ret < 0) { 2209 return ret; 2210 } 2211 assert(nb_sectors); 2212 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2213 break; 2214 } 2215 bs = backing_bs(bs); 2216 if (bs == NULL) { 2217 ret = 0; 2218 break; 2219 } 2220 2221 depth++; 2222 } 2223 2224 e->start = sector_num * BDRV_SECTOR_SIZE; 2225 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2226 e->data = !!(ret & BDRV_BLOCK_DATA); 2227 e->zero = !!(ret & BDRV_BLOCK_ZERO); 2228 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2229 e->has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); 2230 e->depth = depth; 2231 if (file && e->has_offset) { 2232 e->has_filename = true; 2233 e->filename = file->filename; 2234 } 2235 return 0; 2236 } 2237 2238 static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) 2239 { 2240 if (curr->length == 0) { 2241 return false; 2242 } 2243 if (curr->zero != next->zero || 2244 curr->data != next->data || 2245 curr->depth != next->depth || 2246 curr->has_filename != next->has_filename || 2247 curr->has_offset != next->has_offset) { 2248 return false; 2249 } 2250 if (curr->has_filename && strcmp(curr->filename, next->filename)) { 2251 return false; 2252 } 2253 if (curr->has_offset && curr->offset + curr->length != next->offset) { 2254 return false; 2255 } 2256 return true; 2257 } 2258 2259 static int img_map(int argc, char **argv) 2260 { 2261 int c; 2262 OutputFormat output_format = OFORMAT_HUMAN; 2263 BlockBackend *blk; 2264 BlockDriverState *bs; 2265 const char *filename, *fmt, *output; 2266 int64_t length; 2267 MapEntry curr = { .length = 0 }, next; 2268 int ret = 0; 2269 2270 fmt = NULL; 2271 output = NULL; 2272 for (;;) { 2273 int option_index = 0; 2274 static const struct option long_options[] = { 2275 {"help", no_argument, 0, 'h'}, 2276 {"format", required_argument, 0, 'f'}, 2277 {"output", required_argument, 0, OPTION_OUTPUT}, 2278 {0, 0, 0, 0} 2279 }; 2280 c = getopt_long(argc, argv, "f:h", 2281 long_options, &option_index); 2282 if (c == -1) { 2283 break; 2284 } 2285 switch (c) { 2286 case '?': 2287 case 'h': 2288 help(); 2289 break; 2290 case 'f': 2291 fmt = optarg; 2292 break; 2293 case OPTION_OUTPUT: 2294 output = optarg; 2295 break; 2296 } 2297 } 2298 if (optind != argc - 1) { 2299 error_exit("Expecting one image file name"); 2300 } 2301 filename = argv[optind]; 2302 2303 if (output && !strcmp(output, "json")) { 2304 output_format = OFORMAT_JSON; 2305 } else if (output && !strcmp(output, "human")) { 2306 output_format = OFORMAT_HUMAN; 2307 } else if (output) { 2308 error_report("--output must be used with human or json as argument."); 2309 return 1; 2310 } 2311 2312 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2313 if (!blk) { 2314 return 1; 2315 } 2316 bs = blk_bs(blk); 2317 2318 if (output_format == OFORMAT_HUMAN) { 2319 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2320 } 2321 2322 length = blk_getlength(blk); 2323 while (curr.start + curr.length < length) { 2324 int64_t nsectors_left; 2325 int64_t sector_num; 2326 int n; 2327 2328 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2329 2330 /* Probe up to 1 GiB at a time. */ 2331 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2332 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2333 ret = get_block_status(bs, sector_num, n, &next); 2334 2335 if (ret < 0) { 2336 error_report("Could not read file metadata: %s", strerror(-ret)); 2337 goto out; 2338 } 2339 2340 if (entry_mergeable(&curr, &next)) { 2341 curr.length += next.length; 2342 continue; 2343 } 2344 2345 if (curr.length > 0) { 2346 dump_map_entry(output_format, &curr, &next); 2347 } 2348 curr = next; 2349 } 2350 2351 dump_map_entry(output_format, &curr, NULL); 2352 2353 out: 2354 blk_unref(blk); 2355 return ret < 0; 2356 } 2357 2358 #define SNAPSHOT_LIST 1 2359 #define SNAPSHOT_CREATE 2 2360 #define SNAPSHOT_APPLY 3 2361 #define SNAPSHOT_DELETE 4 2362 2363 static int img_snapshot(int argc, char **argv) 2364 { 2365 BlockBackend *blk; 2366 BlockDriverState *bs; 2367 QEMUSnapshotInfo sn; 2368 char *filename, *snapshot_name = NULL; 2369 int c, ret = 0, bdrv_oflags; 2370 int action = 0; 2371 qemu_timeval tv; 2372 bool quiet = false; 2373 Error *err = NULL; 2374 2375 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2376 /* Parse commandline parameters */ 2377 for(;;) { 2378 c = getopt(argc, argv, "la:c:d:hq"); 2379 if (c == -1) { 2380 break; 2381 } 2382 switch(c) { 2383 case '?': 2384 case 'h': 2385 help(); 2386 return 0; 2387 case 'l': 2388 if (action) { 2389 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2390 return 0; 2391 } 2392 action = SNAPSHOT_LIST; 2393 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2394 break; 2395 case 'a': 2396 if (action) { 2397 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2398 return 0; 2399 } 2400 action = SNAPSHOT_APPLY; 2401 snapshot_name = optarg; 2402 break; 2403 case 'c': 2404 if (action) { 2405 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2406 return 0; 2407 } 2408 action = SNAPSHOT_CREATE; 2409 snapshot_name = optarg; 2410 break; 2411 case 'd': 2412 if (action) { 2413 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2414 return 0; 2415 } 2416 action = SNAPSHOT_DELETE; 2417 snapshot_name = optarg; 2418 break; 2419 case 'q': 2420 quiet = true; 2421 break; 2422 } 2423 } 2424 2425 if (optind != argc - 1) { 2426 error_exit("Expecting one image file name"); 2427 } 2428 filename = argv[optind++]; 2429 2430 /* Open the image */ 2431 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2432 if (!blk) { 2433 return 1; 2434 } 2435 bs = blk_bs(blk); 2436 2437 /* Perform the requested action */ 2438 switch(action) { 2439 case SNAPSHOT_LIST: 2440 dump_snapshots(bs); 2441 break; 2442 2443 case SNAPSHOT_CREATE: 2444 memset(&sn, 0, sizeof(sn)); 2445 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2446 2447 qemu_gettimeofday(&tv); 2448 sn.date_sec = tv.tv_sec; 2449 sn.date_nsec = tv.tv_usec * 1000; 2450 2451 ret = bdrv_snapshot_create(bs, &sn); 2452 if (ret) { 2453 error_report("Could not create snapshot '%s': %d (%s)", 2454 snapshot_name, ret, strerror(-ret)); 2455 } 2456 break; 2457 2458 case SNAPSHOT_APPLY: 2459 ret = bdrv_snapshot_goto(bs, snapshot_name); 2460 if (ret) { 2461 error_report("Could not apply snapshot '%s': %d (%s)", 2462 snapshot_name, ret, strerror(-ret)); 2463 } 2464 break; 2465 2466 case SNAPSHOT_DELETE: 2467 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2468 if (err) { 2469 error_reportf_err(err, "Could not delete snapshot '%s': ", 2470 snapshot_name); 2471 ret = 1; 2472 } 2473 break; 2474 } 2475 2476 /* Cleanup */ 2477 blk_unref(blk); 2478 if (ret) { 2479 return 1; 2480 } 2481 return 0; 2482 } 2483 2484 static int img_rebase(int argc, char **argv) 2485 { 2486 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2487 BlockDriverState *bs = NULL; 2488 char *filename; 2489 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2490 int c, flags, src_flags, ret; 2491 int unsafe = 0; 2492 int progress = 0; 2493 bool quiet = false; 2494 Error *local_err = NULL; 2495 2496 /* Parse commandline parameters */ 2497 fmt = NULL; 2498 cache = BDRV_DEFAULT_CACHE; 2499 src_cache = BDRV_DEFAULT_CACHE; 2500 out_baseimg = NULL; 2501 out_basefmt = NULL; 2502 for(;;) { 2503 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2504 if (c == -1) { 2505 break; 2506 } 2507 switch(c) { 2508 case '?': 2509 case 'h': 2510 help(); 2511 return 0; 2512 case 'f': 2513 fmt = optarg; 2514 break; 2515 case 'F': 2516 out_basefmt = optarg; 2517 break; 2518 case 'b': 2519 out_baseimg = optarg; 2520 break; 2521 case 'u': 2522 unsafe = 1; 2523 break; 2524 case 'p': 2525 progress = 1; 2526 break; 2527 case 't': 2528 cache = optarg; 2529 break; 2530 case 'T': 2531 src_cache = optarg; 2532 break; 2533 case 'q': 2534 quiet = true; 2535 break; 2536 } 2537 } 2538 2539 if (quiet) { 2540 progress = 0; 2541 } 2542 2543 if (optind != argc - 1) { 2544 error_exit("Expecting one image file name"); 2545 } 2546 if (!unsafe && !out_baseimg) { 2547 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2548 } 2549 filename = argv[optind++]; 2550 2551 qemu_progress_init(progress, 2.0); 2552 qemu_progress_print(0, 100); 2553 2554 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2555 ret = bdrv_parse_cache_flags(cache, &flags); 2556 if (ret < 0) { 2557 error_report("Invalid cache option: %s", cache); 2558 goto out; 2559 } 2560 2561 src_flags = BDRV_O_FLAGS; 2562 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2563 if (ret < 0) { 2564 error_report("Invalid source cache option: %s", src_cache); 2565 goto out; 2566 } 2567 2568 /* 2569 * Open the images. 2570 * 2571 * Ignore the old backing file for unsafe rebase in case we want to correct 2572 * the reference to a renamed or moved backing file. 2573 */ 2574 blk = img_open("image", filename, fmt, flags, true, quiet); 2575 if (!blk) { 2576 ret = -1; 2577 goto out; 2578 } 2579 bs = blk_bs(blk); 2580 2581 if (out_basefmt != NULL) { 2582 if (bdrv_find_format(out_basefmt) == NULL) { 2583 error_report("Invalid format name: '%s'", out_basefmt); 2584 ret = -1; 2585 goto out; 2586 } 2587 } 2588 2589 /* For safe rebasing we need to compare old and new backing file */ 2590 if (!unsafe) { 2591 char backing_name[PATH_MAX]; 2592 QDict *options = NULL; 2593 2594 if (bs->backing_format[0] != '\0') { 2595 options = qdict_new(); 2596 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2597 } 2598 2599 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2600 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2601 options, src_flags, &local_err); 2602 if (!blk_old_backing) { 2603 error_reportf_err(local_err, 2604 "Could not open old backing file '%s': ", 2605 backing_name); 2606 goto out; 2607 } 2608 2609 if (out_baseimg[0]) { 2610 if (out_basefmt) { 2611 options = qdict_new(); 2612 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2613 } else { 2614 options = NULL; 2615 } 2616 2617 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2618 options, src_flags, &local_err); 2619 if (!blk_new_backing) { 2620 error_reportf_err(local_err, 2621 "Could not open new backing file '%s': ", 2622 out_baseimg); 2623 goto out; 2624 } 2625 } 2626 } 2627 2628 /* 2629 * Check each unallocated cluster in the COW file. If it is unallocated, 2630 * accesses go to the backing file. We must therefore compare this cluster 2631 * in the old and new backing file, and if they differ we need to copy it 2632 * from the old backing file into the COW file. 2633 * 2634 * If qemu-img crashes during this step, no harm is done. The content of 2635 * the image is the same as the original one at any time. 2636 */ 2637 if (!unsafe) { 2638 int64_t num_sectors; 2639 int64_t old_backing_num_sectors; 2640 int64_t new_backing_num_sectors = 0; 2641 uint64_t sector; 2642 int n; 2643 uint8_t * buf_old; 2644 uint8_t * buf_new; 2645 float local_progress = 0; 2646 2647 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2648 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2649 2650 num_sectors = blk_nb_sectors(blk); 2651 if (num_sectors < 0) { 2652 error_report("Could not get size of '%s': %s", 2653 filename, strerror(-num_sectors)); 2654 ret = -1; 2655 goto out; 2656 } 2657 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2658 if (old_backing_num_sectors < 0) { 2659 char backing_name[PATH_MAX]; 2660 2661 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2662 error_report("Could not get size of '%s': %s", 2663 backing_name, strerror(-old_backing_num_sectors)); 2664 ret = -1; 2665 goto out; 2666 } 2667 if (blk_new_backing) { 2668 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2669 if (new_backing_num_sectors < 0) { 2670 error_report("Could not get size of '%s': %s", 2671 out_baseimg, strerror(-new_backing_num_sectors)); 2672 ret = -1; 2673 goto out; 2674 } 2675 } 2676 2677 if (num_sectors != 0) { 2678 local_progress = (float)100 / 2679 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2680 } 2681 2682 for (sector = 0; sector < num_sectors; sector += n) { 2683 2684 /* How many sectors can we handle with the next read? */ 2685 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2686 n = (IO_BUF_SIZE / 512); 2687 } else { 2688 n = num_sectors - sector; 2689 } 2690 2691 /* If the cluster is allocated, we don't need to take action */ 2692 ret = bdrv_is_allocated(bs, sector, n, &n); 2693 if (ret < 0) { 2694 error_report("error while reading image metadata: %s", 2695 strerror(-ret)); 2696 goto out; 2697 } 2698 if (ret) { 2699 continue; 2700 } 2701 2702 /* 2703 * Read old and new backing file and take into consideration that 2704 * backing files may be smaller than the COW image. 2705 */ 2706 if (sector >= old_backing_num_sectors) { 2707 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2708 } else { 2709 if (sector + n > old_backing_num_sectors) { 2710 n = old_backing_num_sectors - sector; 2711 } 2712 2713 ret = blk_read(blk_old_backing, sector, buf_old, n); 2714 if (ret < 0) { 2715 error_report("error while reading from old backing file"); 2716 goto out; 2717 } 2718 } 2719 2720 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2721 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2722 } else { 2723 if (sector + n > new_backing_num_sectors) { 2724 n = new_backing_num_sectors - sector; 2725 } 2726 2727 ret = blk_read(blk_new_backing, sector, buf_new, n); 2728 if (ret < 0) { 2729 error_report("error while reading from new backing file"); 2730 goto out; 2731 } 2732 } 2733 2734 /* If they differ, we need to write to the COW file */ 2735 uint64_t written = 0; 2736 2737 while (written < n) { 2738 int pnum; 2739 2740 if (compare_sectors(buf_old + written * 512, 2741 buf_new + written * 512, n - written, &pnum)) 2742 { 2743 ret = blk_write(blk, sector + written, 2744 buf_old + written * 512, pnum); 2745 if (ret < 0) { 2746 error_report("Error while writing to COW image: %s", 2747 strerror(-ret)); 2748 goto out; 2749 } 2750 } 2751 2752 written += pnum; 2753 } 2754 qemu_progress_print(local_progress, 100); 2755 } 2756 2757 qemu_vfree(buf_old); 2758 qemu_vfree(buf_new); 2759 } 2760 2761 /* 2762 * Change the backing file. All clusters that are different from the old 2763 * backing file are overwritten in the COW file now, so the visible content 2764 * doesn't change when we switch the backing file. 2765 */ 2766 if (out_baseimg && *out_baseimg) { 2767 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2768 } else { 2769 ret = bdrv_change_backing_file(bs, NULL, NULL); 2770 } 2771 2772 if (ret == -ENOSPC) { 2773 error_report("Could not change the backing file to '%s': No " 2774 "space left in the file header", out_baseimg); 2775 } else if (ret < 0) { 2776 error_report("Could not change the backing file to '%s': %s", 2777 out_baseimg, strerror(-ret)); 2778 } 2779 2780 qemu_progress_print(100, 0); 2781 /* 2782 * TODO At this point it is possible to check if any clusters that are 2783 * allocated in the COW file are the same in the backing file. If so, they 2784 * could be dropped from the COW file. Don't do this before switching the 2785 * backing file, in case of a crash this would lead to corruption. 2786 */ 2787 out: 2788 qemu_progress_end(); 2789 /* Cleanup */ 2790 if (!unsafe) { 2791 blk_unref(blk_old_backing); 2792 blk_unref(blk_new_backing); 2793 } 2794 2795 blk_unref(blk); 2796 if (ret) { 2797 return 1; 2798 } 2799 return 0; 2800 } 2801 2802 static int img_resize(int argc, char **argv) 2803 { 2804 Error *err = NULL; 2805 int c, ret, relative; 2806 const char *filename, *fmt, *size; 2807 int64_t n, total_size; 2808 bool quiet = false; 2809 BlockBackend *blk = NULL; 2810 QemuOpts *param; 2811 static QemuOptsList resize_options = { 2812 .name = "resize_options", 2813 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2814 .desc = { 2815 { 2816 .name = BLOCK_OPT_SIZE, 2817 .type = QEMU_OPT_SIZE, 2818 .help = "Virtual disk size" 2819 }, { 2820 /* end of list */ 2821 } 2822 }, 2823 }; 2824 2825 /* Remove size from argv manually so that negative numbers are not treated 2826 * as options by getopt. */ 2827 if (argc < 3) { 2828 error_exit("Not enough arguments"); 2829 return 1; 2830 } 2831 2832 size = argv[--argc]; 2833 2834 /* Parse getopt arguments */ 2835 fmt = NULL; 2836 for(;;) { 2837 c = getopt(argc, argv, "f:hq"); 2838 if (c == -1) { 2839 break; 2840 } 2841 switch(c) { 2842 case '?': 2843 case 'h': 2844 help(); 2845 break; 2846 case 'f': 2847 fmt = optarg; 2848 break; 2849 case 'q': 2850 quiet = true; 2851 break; 2852 } 2853 } 2854 if (optind != argc - 1) { 2855 error_exit("Expecting one image file name"); 2856 } 2857 filename = argv[optind++]; 2858 2859 /* Choose grow, shrink, or absolute resize mode */ 2860 switch (size[0]) { 2861 case '+': 2862 relative = 1; 2863 size++; 2864 break; 2865 case '-': 2866 relative = -1; 2867 size++; 2868 break; 2869 default: 2870 relative = 0; 2871 break; 2872 } 2873 2874 /* Parse size */ 2875 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2876 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2877 if (err) { 2878 error_report_err(err); 2879 ret = -1; 2880 qemu_opts_del(param); 2881 goto out; 2882 } 2883 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2884 qemu_opts_del(param); 2885 2886 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2887 true, quiet); 2888 if (!blk) { 2889 ret = -1; 2890 goto out; 2891 } 2892 2893 if (relative) { 2894 total_size = blk_getlength(blk) + n * relative; 2895 } else { 2896 total_size = n; 2897 } 2898 if (total_size <= 0) { 2899 error_report("New image size must be positive"); 2900 ret = -1; 2901 goto out; 2902 } 2903 2904 ret = blk_truncate(blk, total_size); 2905 switch (ret) { 2906 case 0: 2907 qprintf(quiet, "Image resized.\n"); 2908 break; 2909 case -ENOTSUP: 2910 error_report("This image does not support resize"); 2911 break; 2912 case -EACCES: 2913 error_report("Image is read-only"); 2914 break; 2915 default: 2916 error_report("Error resizing image (%d)", -ret); 2917 break; 2918 } 2919 out: 2920 blk_unref(blk); 2921 if (ret) { 2922 return 1; 2923 } 2924 return 0; 2925 } 2926 2927 static void amend_status_cb(BlockDriverState *bs, 2928 int64_t offset, int64_t total_work_size, 2929 void *opaque) 2930 { 2931 qemu_progress_print(100.f * offset / total_work_size, 0); 2932 } 2933 2934 static int img_amend(int argc, char **argv) 2935 { 2936 Error *err = NULL; 2937 int c, ret = 0; 2938 char *options = NULL; 2939 QemuOptsList *create_opts = NULL; 2940 QemuOpts *opts = NULL; 2941 const char *fmt = NULL, *filename, *cache; 2942 int flags; 2943 bool quiet = false, progress = false; 2944 BlockBackend *blk = NULL; 2945 BlockDriverState *bs = NULL; 2946 2947 cache = BDRV_DEFAULT_CACHE; 2948 for (;;) { 2949 c = getopt(argc, argv, "ho:f:t:pq"); 2950 if (c == -1) { 2951 break; 2952 } 2953 2954 switch (c) { 2955 case 'h': 2956 case '?': 2957 help(); 2958 break; 2959 case 'o': 2960 if (!is_valid_option_list(optarg)) { 2961 error_report("Invalid option list: %s", optarg); 2962 ret = -1; 2963 goto out_no_progress; 2964 } 2965 if (!options) { 2966 options = g_strdup(optarg); 2967 } else { 2968 char *old_options = options; 2969 options = g_strdup_printf("%s,%s", options, optarg); 2970 g_free(old_options); 2971 } 2972 break; 2973 case 'f': 2974 fmt = optarg; 2975 break; 2976 case 't': 2977 cache = optarg; 2978 break; 2979 case 'p': 2980 progress = true; 2981 break; 2982 case 'q': 2983 quiet = true; 2984 break; 2985 } 2986 } 2987 2988 if (!options) { 2989 error_exit("Must specify options (-o)"); 2990 } 2991 2992 if (quiet) { 2993 progress = false; 2994 } 2995 qemu_progress_init(progress, 1.0); 2996 2997 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2998 if (fmt && has_help_option(options)) { 2999 /* If a format is explicitly specified (and possibly no filename is 3000 * given), print option help here */ 3001 ret = print_block_option_help(filename, fmt); 3002 goto out; 3003 } 3004 3005 if (optind != argc - 1) { 3006 error_report("Expecting one image file name"); 3007 ret = -1; 3008 goto out; 3009 } 3010 3011 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 3012 ret = bdrv_parse_cache_flags(cache, &flags); 3013 if (ret < 0) { 3014 error_report("Invalid cache option: %s", cache); 3015 goto out; 3016 } 3017 3018 blk = img_open("image", filename, fmt, flags, true, quiet); 3019 if (!blk) { 3020 ret = -1; 3021 goto out; 3022 } 3023 bs = blk_bs(blk); 3024 3025 fmt = bs->drv->format_name; 3026 3027 if (has_help_option(options)) { 3028 /* If the format was auto-detected, print option help here */ 3029 ret = print_block_option_help(filename, fmt); 3030 goto out; 3031 } 3032 3033 if (!bs->drv->create_opts) { 3034 error_report("Format driver '%s' does not support any options to amend", 3035 fmt); 3036 ret = -1; 3037 goto out; 3038 } 3039 3040 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3041 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3042 if (options) { 3043 qemu_opts_do_parse(opts, options, NULL, &err); 3044 if (err) { 3045 error_report_err(err); 3046 ret = -1; 3047 goto out; 3048 } 3049 } 3050 3051 /* In case the driver does not call amend_status_cb() */ 3052 qemu_progress_print(0.f, 0); 3053 ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); 3054 qemu_progress_print(100.f, 0); 3055 if (ret < 0) { 3056 error_report("Error while amending options: %s", strerror(-ret)); 3057 goto out; 3058 } 3059 3060 out: 3061 qemu_progress_end(); 3062 3063 out_no_progress: 3064 blk_unref(blk); 3065 qemu_opts_del(opts); 3066 qemu_opts_free(create_opts); 3067 g_free(options); 3068 3069 if (ret) { 3070 return 1; 3071 } 3072 return 0; 3073 } 3074 3075 static const img_cmd_t img_cmds[] = { 3076 #define DEF(option, callback, arg_string) \ 3077 { option, callback }, 3078 #include "qemu-img-cmds.h" 3079 #undef DEF 3080 #undef GEN_DOCS 3081 { NULL, NULL, }, 3082 }; 3083 3084 int main(int argc, char **argv) 3085 { 3086 const img_cmd_t *cmd; 3087 const char *cmdname; 3088 Error *local_error = NULL; 3089 int c; 3090 static const struct option long_options[] = { 3091 {"help", no_argument, 0, 'h'}, 3092 {"version", no_argument, 0, 'v'}, 3093 {0, 0, 0, 0} 3094 }; 3095 3096 #ifdef CONFIG_POSIX 3097 signal(SIGPIPE, SIG_IGN); 3098 #endif 3099 3100 error_set_progname(argv[0]); 3101 qemu_init_exec_dir(argv[0]); 3102 3103 if (qemu_init_main_loop(&local_error)) { 3104 error_report_err(local_error); 3105 exit(EXIT_FAILURE); 3106 } 3107 3108 bdrv_init(); 3109 if (argc < 2) { 3110 error_exit("Not enough arguments"); 3111 } 3112 cmdname = argv[1]; 3113 3114 /* find the command */ 3115 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3116 if (!strcmp(cmdname, cmd->name)) { 3117 return cmd->handler(argc - 1, argv + 1); 3118 } 3119 } 3120 3121 c = getopt_long(argc, argv, "h", long_options, NULL); 3122 3123 if (c == 'h') { 3124 help(); 3125 } 3126 if (c == 'v') { 3127 printf(QEMU_IMG_VERSION); 3128 return 0; 3129 } 3130 3131 /* not found */ 3132 error_exit("Command not found: %s", cmdname); 3133 } 3134