1 /* 2 * QEMU disk image utility 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qapi-visit.h" 25 #include "qapi/qmp-output-visitor.h" 26 #include "qapi/qmp/qjson.h" 27 #include "qemu-common.h" 28 #include "qemu/option.h" 29 #include "qemu/error-report.h" 30 #include "qemu/osdep.h" 31 #include "sysemu/sysemu.h" 32 #include "sysemu/block-backend.h" 33 #include "block/block_int.h" 34 #include "block/blockjob.h" 35 #include "block/qapi.h" 36 #include <getopt.h> 37 38 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 39 ", Copyright (c) 2004-2008 Fabrice Bellard\n" 40 41 typedef struct img_cmd_t { 42 const char *name; 43 int (*handler)(int argc, char **argv); 44 } img_cmd_t; 45 46 enum { 47 OPTION_OUTPUT = 256, 48 OPTION_BACKING_CHAIN = 257, 49 }; 50 51 typedef enum OutputFormat { 52 OFORMAT_JSON, 53 OFORMAT_HUMAN, 54 } OutputFormat; 55 56 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ 57 #define BDRV_O_FLAGS BDRV_O_CACHE_WB 58 #define BDRV_DEFAULT_CACHE "writeback" 59 60 static void format_print(void *opaque, const char *name) 61 { 62 printf(" %s", name); 63 } 64 65 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 66 { 67 va_list ap; 68 69 error_printf("qemu-img: "); 70 71 va_start(ap, fmt); 72 error_vprintf(fmt, ap); 73 va_end(ap); 74 75 error_printf("\nTry 'qemu-img --help' for more information\n"); 76 exit(EXIT_FAILURE); 77 } 78 79 /* Please keep in synch with qemu-img.texi */ 80 static void QEMU_NORETURN help(void) 81 { 82 const char *help_msg = 83 QEMU_IMG_VERSION 84 "usage: qemu-img command [command options]\n" 85 "QEMU disk image utility\n" 86 "\n" 87 "Command syntax:\n" 88 #define DEF(option, callback, arg_string) \ 89 " " arg_string "\n" 90 #include "qemu-img-cmds.h" 91 #undef DEF 92 #undef GEN_DOCS 93 "\n" 94 "Command parameters:\n" 95 " 'filename' is a disk image filename\n" 96 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 97 " 'cache' is the cache mode used to write the output disk image, the valid\n" 98 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 99 " 'directsync' and 'unsafe' (default for convert)\n" 100 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 101 " options are the same as for the 'cache' option\n" 102 " 'size' is the disk image size in bytes. Optional suffixes\n" 103 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 104 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 105 " supported. 'b' is ignored.\n" 106 " 'output_filename' is the destination disk image filename\n" 107 " 'output_fmt' is the destination format\n" 108 " 'options' is a comma separated list of format specific options in a\n" 109 " name=value format. Use -o ? for an overview of the options supported by the\n" 110 " used format\n" 111 " 'snapshot_param' is param used for internal snapshot, format\n" 112 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 113 " '[ID_OR_NAME]'\n" 114 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 115 " instead\n" 116 " '-c' indicates that target image must be compressed (qcow format only)\n" 117 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 118 " match exactly. The image doesn't need a working backing file before\n" 119 " rebasing in this case (useful for renaming the backing file)\n" 120 " '-h' with or without a command shows this help and lists the supported formats\n" 121 " '-p' show progress of command (only certain commands)\n" 122 " '-q' use Quiet mode - do not print any output (except errors)\n" 123 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 124 " contain only zeros for qemu-img to create a sparse image during\n" 125 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 126 " unallocated or zero sectors, and the destination image will always be\n" 127 " fully allocated\n" 128 " '--output' takes the format in which the output must be done (human or json)\n" 129 " '-n' skips the target volume creation (useful if the volume is created\n" 130 " prior to running qemu-img)\n" 131 "\n" 132 "Parameters to check subcommand:\n" 133 " '-r' tries to repair any inconsistencies that are found during the check.\n" 134 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 135 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 136 " hiding corruption that has already occurred.\n" 137 "\n" 138 "Parameters to snapshot subcommand:\n" 139 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 140 " '-a' applies a snapshot (revert disk to saved state)\n" 141 " '-c' creates a snapshot\n" 142 " '-d' deletes a snapshot\n" 143 " '-l' lists all snapshots in the given image\n" 144 "\n" 145 "Parameters to compare subcommand:\n" 146 " '-f' first image format\n" 147 " '-F' second image format\n" 148 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 149 150 printf("%s\nSupported formats:", help_msg); 151 bdrv_iterate_format(format_print, NULL); 152 printf("\n"); 153 exit(EXIT_SUCCESS); 154 } 155 156 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 157 { 158 int ret = 0; 159 if (!quiet) { 160 va_list args; 161 va_start(args, fmt); 162 ret = vprintf(fmt, args); 163 va_end(args); 164 } 165 return ret; 166 } 167 168 #if defined(WIN32) 169 /* XXX: put correct support for win32 */ 170 static int read_password(char *buf, int buf_size) 171 { 172 int c, i; 173 174 printf("Password: "); 175 fflush(stdout); 176 i = 0; 177 for(;;) { 178 c = getchar(); 179 if (c < 0) { 180 buf[i] = '\0'; 181 return -1; 182 } else if (c == '\n') { 183 break; 184 } else if (i < (buf_size - 1)) { 185 buf[i++] = c; 186 } 187 } 188 buf[i] = '\0'; 189 return 0; 190 } 191 192 #else 193 194 #include <termios.h> 195 196 static struct termios oldtty; 197 198 static void term_exit(void) 199 { 200 tcsetattr (0, TCSANOW, &oldtty); 201 } 202 203 static void term_init(void) 204 { 205 struct termios tty; 206 207 tcgetattr (0, &tty); 208 oldtty = tty; 209 210 tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP 211 |INLCR|IGNCR|ICRNL|IXON); 212 tty.c_oflag |= OPOST; 213 tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN); 214 tty.c_cflag &= ~(CSIZE|PARENB); 215 tty.c_cflag |= CS8; 216 tty.c_cc[VMIN] = 1; 217 tty.c_cc[VTIME] = 0; 218 219 tcsetattr (0, TCSANOW, &tty); 220 221 atexit(term_exit); 222 } 223 224 static int read_password(char *buf, int buf_size) 225 { 226 uint8_t ch; 227 int i, ret; 228 229 printf("password: "); 230 fflush(stdout); 231 term_init(); 232 i = 0; 233 for(;;) { 234 ret = read(0, &ch, 1); 235 if (ret == -1) { 236 if (errno == EAGAIN || errno == EINTR) { 237 continue; 238 } else { 239 break; 240 } 241 } else if (ret == 0) { 242 ret = -1; 243 break; 244 } else { 245 if (ch == '\r') { 246 ret = 0; 247 break; 248 } 249 if (i < (buf_size - 1)) 250 buf[i++] = ch; 251 } 252 } 253 term_exit(); 254 buf[i] = '\0'; 255 printf("\n"); 256 return ret; 257 } 258 #endif 259 260 static int print_block_option_help(const char *filename, const char *fmt) 261 { 262 BlockDriver *drv, *proto_drv; 263 QemuOptsList *create_opts = NULL; 264 Error *local_err = NULL; 265 266 /* Find driver and parse its options */ 267 drv = bdrv_find_format(fmt); 268 if (!drv) { 269 error_report("Unknown file format '%s'", fmt); 270 return 1; 271 } 272 273 create_opts = qemu_opts_append(create_opts, drv->create_opts); 274 if (filename) { 275 proto_drv = bdrv_find_protocol(filename, true, &local_err); 276 if (!proto_drv) { 277 qerror_report_err(local_err); 278 error_free(local_err); 279 qemu_opts_free(create_opts); 280 return 1; 281 } 282 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 283 } 284 285 qemu_opts_print_help(create_opts); 286 qemu_opts_free(create_opts); 287 return 0; 288 } 289 290 static BlockBackend *img_open(const char *id, const char *filename, 291 const char *fmt, int flags, 292 bool require_io, bool quiet) 293 { 294 BlockBackend *blk; 295 BlockDriverState *bs; 296 char password[256]; 297 Error *local_err = NULL; 298 QDict *options = NULL; 299 300 if (fmt) { 301 options = qdict_new(); 302 qdict_put(options, "driver", qstring_from_str(fmt)); 303 } 304 305 blk = blk_new_open(id, filename, NULL, options, flags, &local_err); 306 if (!blk) { 307 error_report("Could not open '%s': %s", filename, 308 error_get_pretty(local_err)); 309 error_free(local_err); 310 goto fail; 311 } 312 313 bs = blk_bs(blk); 314 if (bdrv_is_encrypted(bs) && require_io) { 315 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 316 if (read_password(password, sizeof(password)) < 0) { 317 error_report("No password given"); 318 goto fail; 319 } 320 if (bdrv_set_key(bs, password) < 0) { 321 error_report("invalid password"); 322 goto fail; 323 } 324 } 325 return blk; 326 fail: 327 blk_unref(blk); 328 return NULL; 329 } 330 331 static int add_old_style_options(const char *fmt, QemuOpts *opts, 332 const char *base_filename, 333 const char *base_fmt) 334 { 335 Error *err = NULL; 336 337 if (base_filename) { 338 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 339 if (err) { 340 error_report("Backing file not supported for file format '%s'", 341 fmt); 342 error_free(err); 343 return -1; 344 } 345 } 346 if (base_fmt) { 347 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 348 if (err) { 349 error_report("Backing file format not supported for file " 350 "format '%s'", fmt); 351 error_free(err); 352 return -1; 353 } 354 } 355 return 0; 356 } 357 358 static int img_create(int argc, char **argv) 359 { 360 int c; 361 uint64_t img_size = -1; 362 const char *fmt = "raw"; 363 const char *base_fmt = NULL; 364 const char *filename; 365 const char *base_filename = NULL; 366 char *options = NULL; 367 Error *local_err = NULL; 368 bool quiet = false; 369 370 for(;;) { 371 c = getopt(argc, argv, "F:b:f:he6o:q"); 372 if (c == -1) { 373 break; 374 } 375 switch(c) { 376 case '?': 377 case 'h': 378 help(); 379 break; 380 case 'F': 381 base_fmt = optarg; 382 break; 383 case 'b': 384 base_filename = optarg; 385 break; 386 case 'f': 387 fmt = optarg; 388 break; 389 case 'e': 390 error_report("option -e is deprecated, please use \'-o " 391 "encryption\' instead!"); 392 goto fail; 393 case '6': 394 error_report("option -6 is deprecated, please use \'-o " 395 "compat6\' instead!"); 396 goto fail; 397 case 'o': 398 if (!is_valid_option_list(optarg)) { 399 error_report("Invalid option list: %s", optarg); 400 goto fail; 401 } 402 if (!options) { 403 options = g_strdup(optarg); 404 } else { 405 char *old_options = options; 406 options = g_strdup_printf("%s,%s", options, optarg); 407 g_free(old_options); 408 } 409 break; 410 case 'q': 411 quiet = true; 412 break; 413 } 414 } 415 416 /* Get the filename */ 417 filename = (optind < argc) ? argv[optind] : NULL; 418 if (options && has_help_option(options)) { 419 g_free(options); 420 return print_block_option_help(filename, fmt); 421 } 422 423 if (optind >= argc) { 424 error_exit("Expecting image file name"); 425 } 426 optind++; 427 428 /* Get image size, if specified */ 429 if (optind < argc) { 430 int64_t sval; 431 char *end; 432 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); 433 if (sval < 0 || *end) { 434 if (sval == -ERANGE) { 435 error_report("Image size must be less than 8 EiB!"); 436 } else { 437 error_report("Invalid image size specified! You may use k, M, " 438 "G, T, P or E suffixes for "); 439 error_report("kilobytes, megabytes, gigabytes, terabytes, " 440 "petabytes and exabytes."); 441 } 442 goto fail; 443 } 444 img_size = (uint64_t)sval; 445 } 446 if (optind != argc) { 447 error_exit("Unexpected argument: %s", argv[optind]); 448 } 449 450 bdrv_img_create(filename, fmt, base_filename, base_fmt, 451 options, img_size, BDRV_O_FLAGS, &local_err, quiet); 452 if (local_err) { 453 error_report("%s: %s", filename, error_get_pretty(local_err)); 454 error_free(local_err); 455 goto fail; 456 } 457 458 g_free(options); 459 return 0; 460 461 fail: 462 g_free(options); 463 return 1; 464 } 465 466 static void dump_json_image_check(ImageCheck *check, bool quiet) 467 { 468 Error *local_err = NULL; 469 QString *str; 470 QmpOutputVisitor *ov = qmp_output_visitor_new(); 471 QObject *obj; 472 visit_type_ImageCheck(qmp_output_get_visitor(ov), 473 &check, NULL, &local_err); 474 obj = qmp_output_get_qobject(ov); 475 str = qobject_to_json_pretty(obj); 476 assert(str != NULL); 477 qprintf(quiet, "%s\n", qstring_get_str(str)); 478 qobject_decref(obj); 479 qmp_output_visitor_cleanup(ov); 480 QDECREF(str); 481 } 482 483 static void dump_human_image_check(ImageCheck *check, bool quiet) 484 { 485 if (!(check->corruptions || check->leaks || check->check_errors)) { 486 qprintf(quiet, "No errors were found on the image.\n"); 487 } else { 488 if (check->corruptions) { 489 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 490 "Data may be corrupted, or further writes to the image " 491 "may corrupt it.\n", 492 check->corruptions); 493 } 494 495 if (check->leaks) { 496 qprintf(quiet, 497 "\n%" PRId64 " leaked clusters were found on the image.\n" 498 "This means waste of disk space, but no harm to data.\n", 499 check->leaks); 500 } 501 502 if (check->check_errors) { 503 qprintf(quiet, 504 "\n%" PRId64 505 " internal errors have occurred during the check.\n", 506 check->check_errors); 507 } 508 } 509 510 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 511 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 512 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 513 check->allocated_clusters, check->total_clusters, 514 check->allocated_clusters * 100.0 / check->total_clusters, 515 check->fragmented_clusters * 100.0 / check->allocated_clusters, 516 check->compressed_clusters * 100.0 / 517 check->allocated_clusters); 518 } 519 520 if (check->image_end_offset) { 521 qprintf(quiet, 522 "Image end offset: %" PRId64 "\n", check->image_end_offset); 523 } 524 } 525 526 static int collect_image_check(BlockDriverState *bs, 527 ImageCheck *check, 528 const char *filename, 529 const char *fmt, 530 int fix) 531 { 532 int ret; 533 BdrvCheckResult result; 534 535 ret = bdrv_check(bs, &result, fix); 536 if (ret < 0) { 537 return ret; 538 } 539 540 check->filename = g_strdup(filename); 541 check->format = g_strdup(bdrv_get_format_name(bs)); 542 check->check_errors = result.check_errors; 543 check->corruptions = result.corruptions; 544 check->has_corruptions = result.corruptions != 0; 545 check->leaks = result.leaks; 546 check->has_leaks = result.leaks != 0; 547 check->corruptions_fixed = result.corruptions_fixed; 548 check->has_corruptions_fixed = result.corruptions != 0; 549 check->leaks_fixed = result.leaks_fixed; 550 check->has_leaks_fixed = result.leaks != 0; 551 check->image_end_offset = result.image_end_offset; 552 check->has_image_end_offset = result.image_end_offset != 0; 553 check->total_clusters = result.bfi.total_clusters; 554 check->has_total_clusters = result.bfi.total_clusters != 0; 555 check->allocated_clusters = result.bfi.allocated_clusters; 556 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 557 check->fragmented_clusters = result.bfi.fragmented_clusters; 558 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 559 check->compressed_clusters = result.bfi.compressed_clusters; 560 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 561 562 return 0; 563 } 564 565 /* 566 * Checks an image for consistency. Exit codes: 567 * 568 * 0 - Check completed, image is good 569 * 1 - Check not completed because of internal errors 570 * 2 - Check completed, image is corrupted 571 * 3 - Check completed, image has leaked clusters, but is good otherwise 572 * 63 - Checks are not supported by the image format 573 */ 574 static int img_check(int argc, char **argv) 575 { 576 int c, ret; 577 OutputFormat output_format = OFORMAT_HUMAN; 578 const char *filename, *fmt, *output, *cache; 579 BlockBackend *blk; 580 BlockDriverState *bs; 581 int fix = 0; 582 int flags = BDRV_O_FLAGS | BDRV_O_CHECK; 583 ImageCheck *check; 584 bool quiet = false; 585 586 fmt = NULL; 587 output = NULL; 588 cache = BDRV_DEFAULT_CACHE; 589 for(;;) { 590 int option_index = 0; 591 static const struct option long_options[] = { 592 {"help", no_argument, 0, 'h'}, 593 {"format", required_argument, 0, 'f'}, 594 {"repair", required_argument, 0, 'r'}, 595 {"output", required_argument, 0, OPTION_OUTPUT}, 596 {0, 0, 0, 0} 597 }; 598 c = getopt_long(argc, argv, "hf:r:T:q", 599 long_options, &option_index); 600 if (c == -1) { 601 break; 602 } 603 switch(c) { 604 case '?': 605 case 'h': 606 help(); 607 break; 608 case 'f': 609 fmt = optarg; 610 break; 611 case 'r': 612 flags |= BDRV_O_RDWR; 613 614 if (!strcmp(optarg, "leaks")) { 615 fix = BDRV_FIX_LEAKS; 616 } else if (!strcmp(optarg, "all")) { 617 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 618 } else { 619 error_exit("Unknown option value for -r " 620 "(expecting 'leaks' or 'all'): %s", optarg); 621 } 622 break; 623 case OPTION_OUTPUT: 624 output = optarg; 625 break; 626 case 'T': 627 cache = optarg; 628 break; 629 case 'q': 630 quiet = true; 631 break; 632 } 633 } 634 if (optind != argc - 1) { 635 error_exit("Expecting one image file name"); 636 } 637 filename = argv[optind++]; 638 639 if (output && !strcmp(output, "json")) { 640 output_format = OFORMAT_JSON; 641 } else if (output && !strcmp(output, "human")) { 642 output_format = OFORMAT_HUMAN; 643 } else if (output) { 644 error_report("--output must be used with human or json as argument."); 645 return 1; 646 } 647 648 ret = bdrv_parse_cache_flags(cache, &flags); 649 if (ret < 0) { 650 error_report("Invalid source cache option: %s", cache); 651 return 1; 652 } 653 654 blk = img_open("image", filename, fmt, flags, true, quiet); 655 if (!blk) { 656 return 1; 657 } 658 bs = blk_bs(blk); 659 660 check = g_new0(ImageCheck, 1); 661 ret = collect_image_check(bs, check, filename, fmt, fix); 662 663 if (ret == -ENOTSUP) { 664 error_report("This image format does not support checks"); 665 ret = 63; 666 goto fail; 667 } 668 669 if (check->corruptions_fixed || check->leaks_fixed) { 670 int corruptions_fixed, leaks_fixed; 671 672 leaks_fixed = check->leaks_fixed; 673 corruptions_fixed = check->corruptions_fixed; 674 675 if (output_format == OFORMAT_HUMAN) { 676 qprintf(quiet, 677 "The following inconsistencies were found and repaired:\n\n" 678 " %" PRId64 " leaked clusters\n" 679 " %" PRId64 " corruptions\n\n" 680 "Double checking the fixed image now...\n", 681 check->leaks_fixed, 682 check->corruptions_fixed); 683 } 684 685 ret = collect_image_check(bs, check, filename, fmt, 0); 686 687 check->leaks_fixed = leaks_fixed; 688 check->corruptions_fixed = corruptions_fixed; 689 } 690 691 if (!ret) { 692 switch (output_format) { 693 case OFORMAT_HUMAN: 694 dump_human_image_check(check, quiet); 695 break; 696 case OFORMAT_JSON: 697 dump_json_image_check(check, quiet); 698 break; 699 } 700 } 701 702 if (ret || check->check_errors) { 703 if (ret) { 704 error_report("Check failed: %s", strerror(-ret)); 705 } else { 706 error_report("Check failed"); 707 } 708 ret = 1; 709 goto fail; 710 } 711 712 if (check->corruptions) { 713 ret = 2; 714 } else if (check->leaks) { 715 ret = 3; 716 } else { 717 ret = 0; 718 } 719 720 fail: 721 qapi_free_ImageCheck(check); 722 blk_unref(blk); 723 return ret; 724 } 725 726 typedef struct CommonBlockJobCBInfo { 727 BlockDriverState *bs; 728 Error **errp; 729 } CommonBlockJobCBInfo; 730 731 static void common_block_job_cb(void *opaque, int ret) 732 { 733 CommonBlockJobCBInfo *cbi = opaque; 734 735 if (ret < 0) { 736 error_setg_errno(cbi->errp, -ret, "Block job failed"); 737 } 738 739 /* Drop this block job's reference */ 740 bdrv_unref(cbi->bs); 741 } 742 743 static void run_block_job(BlockJob *job, Error **errp) 744 { 745 AioContext *aio_context = bdrv_get_aio_context(job->bs); 746 747 do { 748 aio_poll(aio_context, true); 749 qemu_progress_print((float)job->offset / job->len * 100.f, 0); 750 } while (!job->ready); 751 752 block_job_complete_sync(job, errp); 753 754 /* A block job may finish instantaneously without publishing any progress, 755 * so just signal completion here */ 756 qemu_progress_print(100.f, 0); 757 } 758 759 static int img_commit(int argc, char **argv) 760 { 761 int c, ret, flags; 762 const char *filename, *fmt, *cache, *base; 763 BlockBackend *blk; 764 BlockDriverState *bs, *base_bs; 765 bool progress = false, quiet = false, drop = false; 766 Error *local_err = NULL; 767 CommonBlockJobCBInfo cbi; 768 769 fmt = NULL; 770 cache = BDRV_DEFAULT_CACHE; 771 base = NULL; 772 for(;;) { 773 c = getopt(argc, argv, "f:ht:b:dpq"); 774 if (c == -1) { 775 break; 776 } 777 switch(c) { 778 case '?': 779 case 'h': 780 help(); 781 break; 782 case 'f': 783 fmt = optarg; 784 break; 785 case 't': 786 cache = optarg; 787 break; 788 case 'b': 789 base = optarg; 790 /* -b implies -d */ 791 drop = true; 792 break; 793 case 'd': 794 drop = true; 795 break; 796 case 'p': 797 progress = true; 798 break; 799 case 'q': 800 quiet = true; 801 break; 802 } 803 } 804 805 /* Progress is not shown in Quiet mode */ 806 if (quiet) { 807 progress = false; 808 } 809 810 if (optind != argc - 1) { 811 error_exit("Expecting one image file name"); 812 } 813 filename = argv[optind++]; 814 815 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 816 ret = bdrv_parse_cache_flags(cache, &flags); 817 if (ret < 0) { 818 error_report("Invalid cache option: %s", cache); 819 return 1; 820 } 821 822 blk = img_open("image", filename, fmt, flags, true, quiet); 823 if (!blk) { 824 return 1; 825 } 826 bs = blk_bs(blk); 827 828 qemu_progress_init(progress, 1.f); 829 qemu_progress_print(0.f, 100); 830 831 if (base) { 832 base_bs = bdrv_find_backing_image(bs, base); 833 if (!base_bs) { 834 error_set(&local_err, QERR_BASE_NOT_FOUND, base); 835 goto done; 836 } 837 } else { 838 /* This is different from QMP, which by default uses the deepest file in 839 * the backing chain (i.e., the very base); however, the traditional 840 * behavior of qemu-img commit is using the immediate backing file. */ 841 base_bs = bs->backing_hd; 842 if (!base_bs) { 843 error_setg(&local_err, "Image does not have a backing file"); 844 goto done; 845 } 846 } 847 848 cbi = (CommonBlockJobCBInfo){ 849 .errp = &local_err, 850 .bs = bs, 851 }; 852 853 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 854 common_block_job_cb, &cbi, &local_err); 855 if (local_err) { 856 goto done; 857 } 858 859 /* The block job will swap base_bs and bs (which is not what we really want 860 * here, but okay) and unref base_bs (after the swap, i.e., the old top 861 * image). In order to still be able to empty that top image afterwards, 862 * increment the reference counter here preemptively. */ 863 if (!drop) { 864 bdrv_ref(base_bs); 865 } 866 867 run_block_job(bs->job, &local_err); 868 if (local_err) { 869 goto unref_backing; 870 } 871 872 if (!drop && base_bs->drv->bdrv_make_empty) { 873 ret = base_bs->drv->bdrv_make_empty(base_bs); 874 if (ret) { 875 error_setg_errno(&local_err, -ret, "Could not empty %s", 876 filename); 877 goto unref_backing; 878 } 879 } 880 881 unref_backing: 882 if (!drop) { 883 bdrv_unref(base_bs); 884 } 885 886 done: 887 qemu_progress_end(); 888 889 blk_unref(blk); 890 891 if (local_err) { 892 error_report_err(local_err); 893 return 1; 894 } 895 896 qprintf(quiet, "Image committed.\n"); 897 return 0; 898 } 899 900 /* 901 * Returns true iff the first sector pointed to by 'buf' contains at least 902 * a non-NUL byte. 903 * 904 * 'pnum' is set to the number of sectors (including and immediately following 905 * the first one) that are known to be in the same allocated/unallocated state. 906 */ 907 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 908 { 909 bool is_zero; 910 int i; 911 912 if (n <= 0) { 913 *pnum = 0; 914 return 0; 915 } 916 is_zero = buffer_is_zero(buf, 512); 917 for(i = 1; i < n; i++) { 918 buf += 512; 919 if (is_zero != buffer_is_zero(buf, 512)) { 920 break; 921 } 922 } 923 *pnum = i; 924 return !is_zero; 925 } 926 927 /* 928 * Like is_allocated_sectors, but if the buffer starts with a used sector, 929 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 930 * breaking up write requests for only small sparse areas. 931 */ 932 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 933 int min) 934 { 935 int ret; 936 int num_checked, num_used; 937 938 if (n < min) { 939 min = n; 940 } 941 942 ret = is_allocated_sectors(buf, n, pnum); 943 if (!ret) { 944 return ret; 945 } 946 947 num_used = *pnum; 948 buf += BDRV_SECTOR_SIZE * *pnum; 949 n -= *pnum; 950 num_checked = num_used; 951 952 while (n > 0) { 953 ret = is_allocated_sectors(buf, n, pnum); 954 955 buf += BDRV_SECTOR_SIZE * *pnum; 956 n -= *pnum; 957 num_checked += *pnum; 958 if (ret) { 959 num_used = num_checked; 960 } else if (*pnum >= min) { 961 break; 962 } 963 } 964 965 *pnum = num_used; 966 return 1; 967 } 968 969 /* 970 * Compares two buffers sector by sector. Returns 0 if the first sector of both 971 * buffers matches, non-zero otherwise. 972 * 973 * pnum is set to the number of sectors (including and immediately following 974 * the first one) that are known to have the same comparison result 975 */ 976 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 977 int *pnum) 978 { 979 bool res; 980 int i; 981 982 if (n <= 0) { 983 *pnum = 0; 984 return 0; 985 } 986 987 res = !!memcmp(buf1, buf2, 512); 988 for(i = 1; i < n; i++) { 989 buf1 += 512; 990 buf2 += 512; 991 992 if (!!memcmp(buf1, buf2, 512) != res) { 993 break; 994 } 995 } 996 997 *pnum = i; 998 return res; 999 } 1000 1001 #define IO_BUF_SIZE (2 * 1024 * 1024) 1002 1003 static int64_t sectors_to_bytes(int64_t sectors) 1004 { 1005 return sectors << BDRV_SECTOR_BITS; 1006 } 1007 1008 static int64_t sectors_to_process(int64_t total, int64_t from) 1009 { 1010 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 1011 } 1012 1013 /* 1014 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 1015 * 1016 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 1017 * data and negative value on error. 1018 * 1019 * @param blk: BlockBackend for the image 1020 * @param sect_num: Number of first sector to check 1021 * @param sect_count: Number of sectors to check 1022 * @param filename: Name of disk file we are checking (logging purpose) 1023 * @param buffer: Allocated buffer for storing read data 1024 * @param quiet: Flag for quiet mode 1025 */ 1026 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 1027 int sect_count, const char *filename, 1028 uint8_t *buffer, bool quiet) 1029 { 1030 int pnum, ret = 0; 1031 ret = blk_read(blk, sect_num, buffer, sect_count); 1032 if (ret < 0) { 1033 error_report("Error while reading offset %" PRId64 " of %s: %s", 1034 sectors_to_bytes(sect_num), filename, strerror(-ret)); 1035 return ret; 1036 } 1037 ret = is_allocated_sectors(buffer, sect_count, &pnum); 1038 if (ret || pnum != sect_count) { 1039 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1040 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 1041 return 1; 1042 } 1043 1044 return 0; 1045 } 1046 1047 /* 1048 * Compares two images. Exit codes: 1049 * 1050 * 0 - Images are identical 1051 * 1 - Images differ 1052 * >1 - Error occurred 1053 */ 1054 static int img_compare(int argc, char **argv) 1055 { 1056 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 1057 BlockBackend *blk1, *blk2; 1058 BlockDriverState *bs1, *bs2; 1059 int64_t total_sectors1, total_sectors2; 1060 uint8_t *buf1 = NULL, *buf2 = NULL; 1061 int pnum1, pnum2; 1062 int allocated1, allocated2; 1063 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 1064 bool progress = false, quiet = false, strict = false; 1065 int flags; 1066 int64_t total_sectors; 1067 int64_t sector_num = 0; 1068 int64_t nb_sectors; 1069 int c, pnum; 1070 uint64_t progress_base; 1071 1072 cache = BDRV_DEFAULT_CACHE; 1073 for (;;) { 1074 c = getopt(argc, argv, "hf:F:T:pqs"); 1075 if (c == -1) { 1076 break; 1077 } 1078 switch (c) { 1079 case '?': 1080 case 'h': 1081 help(); 1082 break; 1083 case 'f': 1084 fmt1 = optarg; 1085 break; 1086 case 'F': 1087 fmt2 = optarg; 1088 break; 1089 case 'T': 1090 cache = optarg; 1091 break; 1092 case 'p': 1093 progress = true; 1094 break; 1095 case 'q': 1096 quiet = true; 1097 break; 1098 case 's': 1099 strict = true; 1100 break; 1101 } 1102 } 1103 1104 /* Progress is not shown in Quiet mode */ 1105 if (quiet) { 1106 progress = false; 1107 } 1108 1109 1110 if (optind != argc - 2) { 1111 error_exit("Expecting two image file names"); 1112 } 1113 filename1 = argv[optind++]; 1114 filename2 = argv[optind++]; 1115 1116 /* Initialize before goto out */ 1117 qemu_progress_init(progress, 2.0); 1118 1119 flags = BDRV_O_FLAGS; 1120 ret = bdrv_parse_cache_flags(cache, &flags); 1121 if (ret < 0) { 1122 error_report("Invalid source cache option: %s", cache); 1123 ret = 2; 1124 goto out3; 1125 } 1126 1127 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); 1128 if (!blk1) { 1129 ret = 2; 1130 goto out3; 1131 } 1132 bs1 = blk_bs(blk1); 1133 1134 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1135 if (!blk2) { 1136 ret = 2; 1137 goto out2; 1138 } 1139 bs2 = blk_bs(blk2); 1140 1141 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1142 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1143 total_sectors1 = blk_nb_sectors(blk1); 1144 if (total_sectors1 < 0) { 1145 error_report("Can't get size of %s: %s", 1146 filename1, strerror(-total_sectors1)); 1147 ret = 4; 1148 goto out; 1149 } 1150 total_sectors2 = blk_nb_sectors(blk2); 1151 if (total_sectors2 < 0) { 1152 error_report("Can't get size of %s: %s", 1153 filename2, strerror(-total_sectors2)); 1154 ret = 4; 1155 goto out; 1156 } 1157 total_sectors = MIN(total_sectors1, total_sectors2); 1158 progress_base = MAX(total_sectors1, total_sectors2); 1159 1160 qemu_progress_print(0, 100); 1161 1162 if (strict && total_sectors1 != total_sectors2) { 1163 ret = 1; 1164 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1165 goto out; 1166 } 1167 1168 for (;;) { 1169 nb_sectors = sectors_to_process(total_sectors, sector_num); 1170 if (nb_sectors <= 0) { 1171 break; 1172 } 1173 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, 1174 &pnum1); 1175 if (allocated1 < 0) { 1176 ret = 3; 1177 error_report("Sector allocation test failed for %s", filename1); 1178 goto out; 1179 } 1180 1181 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, 1182 &pnum2); 1183 if (allocated2 < 0) { 1184 ret = 3; 1185 error_report("Sector allocation test failed for %s", filename2); 1186 goto out; 1187 } 1188 nb_sectors = MIN(pnum1, pnum2); 1189 1190 if (allocated1 == allocated2) { 1191 if (allocated1) { 1192 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1193 if (ret < 0) { 1194 error_report("Error while reading offset %" PRId64 " of %s:" 1195 " %s", sectors_to_bytes(sector_num), filename1, 1196 strerror(-ret)); 1197 ret = 4; 1198 goto out; 1199 } 1200 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1201 if (ret < 0) { 1202 error_report("Error while reading offset %" PRId64 1203 " of %s: %s", sectors_to_bytes(sector_num), 1204 filename2, strerror(-ret)); 1205 ret = 4; 1206 goto out; 1207 } 1208 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1209 if (ret || pnum != nb_sectors) { 1210 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1211 sectors_to_bytes( 1212 ret ? sector_num : sector_num + pnum)); 1213 ret = 1; 1214 goto out; 1215 } 1216 } 1217 } else { 1218 if (strict) { 1219 ret = 1; 1220 qprintf(quiet, "Strict mode: Offset %" PRId64 1221 " allocation mismatch!\n", 1222 sectors_to_bytes(sector_num)); 1223 goto out; 1224 } 1225 1226 if (allocated1) { 1227 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1228 filename1, buf1, quiet); 1229 } else { 1230 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1231 filename2, buf1, quiet); 1232 } 1233 if (ret) { 1234 if (ret < 0) { 1235 error_report("Error while reading offset %" PRId64 ": %s", 1236 sectors_to_bytes(sector_num), strerror(-ret)); 1237 ret = 4; 1238 } 1239 goto out; 1240 } 1241 } 1242 sector_num += nb_sectors; 1243 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1244 } 1245 1246 if (total_sectors1 != total_sectors2) { 1247 BlockBackend *blk_over; 1248 int64_t total_sectors_over; 1249 const char *filename_over; 1250 1251 qprintf(quiet, "Warning: Image size mismatch!\n"); 1252 if (total_sectors1 > total_sectors2) { 1253 total_sectors_over = total_sectors1; 1254 blk_over = blk1; 1255 filename_over = filename1; 1256 } else { 1257 total_sectors_over = total_sectors2; 1258 blk_over = blk2; 1259 filename_over = filename2; 1260 } 1261 1262 for (;;) { 1263 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1264 if (nb_sectors <= 0) { 1265 break; 1266 } 1267 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1268 nb_sectors, &pnum); 1269 if (ret < 0) { 1270 ret = 3; 1271 error_report("Sector allocation test failed for %s", 1272 filename_over); 1273 goto out; 1274 1275 } 1276 nb_sectors = pnum; 1277 if (ret) { 1278 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1279 filename_over, buf1, quiet); 1280 if (ret) { 1281 if (ret < 0) { 1282 error_report("Error while reading offset %" PRId64 1283 " of %s: %s", sectors_to_bytes(sector_num), 1284 filename_over, strerror(-ret)); 1285 ret = 4; 1286 } 1287 goto out; 1288 } 1289 } 1290 sector_num += nb_sectors; 1291 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1292 } 1293 } 1294 1295 qprintf(quiet, "Images are identical.\n"); 1296 ret = 0; 1297 1298 out: 1299 qemu_vfree(buf1); 1300 qemu_vfree(buf2); 1301 blk_unref(blk2); 1302 out2: 1303 blk_unref(blk1); 1304 out3: 1305 qemu_progress_end(); 1306 return ret; 1307 } 1308 1309 static int img_convert(int argc, char **argv) 1310 { 1311 int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create; 1312 int64_t ret = 0; 1313 int progress = 0, flags, src_flags; 1314 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1315 BlockDriver *drv, *proto_drv; 1316 BlockBackend **blk = NULL, *out_blk = NULL; 1317 BlockDriverState **bs = NULL, *out_bs = NULL; 1318 int64_t total_sectors, nb_sectors, sector_num, bs_offset; 1319 int64_t *bs_sectors = NULL; 1320 uint8_t * buf = NULL; 1321 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1322 const uint8_t *buf1; 1323 BlockDriverInfo bdi; 1324 QemuOpts *opts = NULL; 1325 QemuOptsList *create_opts = NULL; 1326 const char *out_baseimg_param; 1327 char *options = NULL; 1328 const char *snapshot_name = NULL; 1329 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1330 bool quiet = false; 1331 Error *local_err = NULL; 1332 QemuOpts *sn_opts = NULL; 1333 1334 fmt = NULL; 1335 out_fmt = "raw"; 1336 cache = "unsafe"; 1337 src_cache = BDRV_DEFAULT_CACHE; 1338 out_baseimg = NULL; 1339 compress = 0; 1340 skip_create = 0; 1341 for(;;) { 1342 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1343 if (c == -1) { 1344 break; 1345 } 1346 switch(c) { 1347 case '?': 1348 case 'h': 1349 help(); 1350 break; 1351 case 'f': 1352 fmt = optarg; 1353 break; 1354 case 'O': 1355 out_fmt = optarg; 1356 break; 1357 case 'B': 1358 out_baseimg = optarg; 1359 break; 1360 case 'c': 1361 compress = 1; 1362 break; 1363 case 'e': 1364 error_report("option -e is deprecated, please use \'-o " 1365 "encryption\' instead!"); 1366 ret = -1; 1367 goto fail_getopt; 1368 case '6': 1369 error_report("option -6 is deprecated, please use \'-o " 1370 "compat6\' instead!"); 1371 ret = -1; 1372 goto fail_getopt; 1373 case 'o': 1374 if (!is_valid_option_list(optarg)) { 1375 error_report("Invalid option list: %s", optarg); 1376 ret = -1; 1377 goto fail_getopt; 1378 } 1379 if (!options) { 1380 options = g_strdup(optarg); 1381 } else { 1382 char *old_options = options; 1383 options = g_strdup_printf("%s,%s", options, optarg); 1384 g_free(old_options); 1385 } 1386 break; 1387 case 's': 1388 snapshot_name = optarg; 1389 break; 1390 case 'l': 1391 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1392 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0); 1393 if (!sn_opts) { 1394 error_report("Failed in parsing snapshot param '%s'", 1395 optarg); 1396 ret = -1; 1397 goto fail_getopt; 1398 } 1399 } else { 1400 snapshot_name = optarg; 1401 } 1402 break; 1403 case 'S': 1404 { 1405 int64_t sval; 1406 char *end; 1407 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); 1408 if (sval < 0 || *end) { 1409 error_report("Invalid minimum zero buffer size for sparse output specified"); 1410 ret = -1; 1411 goto fail_getopt; 1412 } 1413 1414 min_sparse = sval / BDRV_SECTOR_SIZE; 1415 break; 1416 } 1417 case 'p': 1418 progress = 1; 1419 break; 1420 case 't': 1421 cache = optarg; 1422 break; 1423 case 'T': 1424 src_cache = optarg; 1425 break; 1426 case 'q': 1427 quiet = true; 1428 break; 1429 case 'n': 1430 skip_create = 1; 1431 break; 1432 } 1433 } 1434 1435 /* Initialize before goto out */ 1436 if (quiet) { 1437 progress = 0; 1438 } 1439 qemu_progress_init(progress, 1.0); 1440 1441 1442 bs_n = argc - optind - 1; 1443 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1444 1445 if (options && has_help_option(options)) { 1446 ret = print_block_option_help(out_filename, out_fmt); 1447 goto out; 1448 } 1449 1450 if (bs_n < 1) { 1451 error_exit("Must specify image file name"); 1452 } 1453 1454 1455 if (bs_n > 1 && out_baseimg) { 1456 error_report("-B makes no sense when concatenating multiple input " 1457 "images"); 1458 ret = -1; 1459 goto out; 1460 } 1461 1462 src_flags = BDRV_O_FLAGS; 1463 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1464 if (ret < 0) { 1465 error_report("Invalid source cache option: %s", src_cache); 1466 goto out; 1467 } 1468 1469 qemu_progress_print(0, 100); 1470 1471 blk = g_new0(BlockBackend *, bs_n); 1472 bs = g_new0(BlockDriverState *, bs_n); 1473 bs_sectors = g_new(int64_t, bs_n); 1474 1475 total_sectors = 0; 1476 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1477 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1478 : g_strdup("source"); 1479 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1480 true, quiet); 1481 g_free(id); 1482 if (!blk[bs_i]) { 1483 ret = -1; 1484 goto out; 1485 } 1486 bs[bs_i] = blk_bs(blk[bs_i]); 1487 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1488 if (bs_sectors[bs_i] < 0) { 1489 error_report("Could not get size of %s: %s", 1490 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1491 ret = -1; 1492 goto out; 1493 } 1494 total_sectors += bs_sectors[bs_i]; 1495 } 1496 1497 if (sn_opts) { 1498 ret = bdrv_snapshot_load_tmp(bs[0], 1499 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1500 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1501 &local_err); 1502 } else if (snapshot_name != NULL) { 1503 if (bs_n > 1) { 1504 error_report("No support for concatenating multiple snapshot"); 1505 ret = -1; 1506 goto out; 1507 } 1508 1509 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1510 } 1511 if (local_err) { 1512 error_report("Failed to load snapshot: %s", 1513 error_get_pretty(local_err)); 1514 error_free(local_err); 1515 ret = -1; 1516 goto out; 1517 } 1518 1519 /* Find driver and parse its options */ 1520 drv = bdrv_find_format(out_fmt); 1521 if (!drv) { 1522 error_report("Unknown file format '%s'", out_fmt); 1523 ret = -1; 1524 goto out; 1525 } 1526 1527 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1528 if (!proto_drv) { 1529 qerror_report_err(local_err); 1530 error_free(local_err); 1531 ret = -1; 1532 goto out; 1533 } 1534 1535 if (!skip_create) { 1536 if (!drv->create_opts) { 1537 error_report("Format driver '%s' does not support image creation", 1538 drv->format_name); 1539 ret = -1; 1540 goto out; 1541 } 1542 1543 if (!proto_drv->create_opts) { 1544 error_report("Protocol driver '%s' does not support image creation", 1545 proto_drv->format_name); 1546 ret = -1; 1547 goto out; 1548 } 1549 1550 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1551 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1552 1553 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1554 if (options) { 1555 qemu_opts_do_parse(opts, options, NULL, &local_err); 1556 if (local_err) { 1557 error_report("Invalid options for file format '%s'", out_fmt); 1558 error_free(local_err); 1559 ret = -1; 1560 goto out; 1561 } 1562 } 1563 1564 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1565 &error_abort); 1566 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1567 if (ret < 0) { 1568 goto out; 1569 } 1570 } 1571 1572 /* Get backing file name if -o backing_file was used */ 1573 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1574 if (out_baseimg_param) { 1575 out_baseimg = out_baseimg_param; 1576 } 1577 1578 /* Check if compression is supported */ 1579 if (compress) { 1580 bool encryption = 1581 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1582 const char *preallocation = 1583 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1584 1585 if (!drv->bdrv_write_compressed) { 1586 error_report("Compression not supported for this file format"); 1587 ret = -1; 1588 goto out; 1589 } 1590 1591 if (encryption) { 1592 error_report("Compression and encryption not supported at " 1593 "the same time"); 1594 ret = -1; 1595 goto out; 1596 } 1597 1598 if (preallocation 1599 && strcmp(preallocation, "off")) 1600 { 1601 error_report("Compression and preallocation not supported at " 1602 "the same time"); 1603 ret = -1; 1604 goto out; 1605 } 1606 } 1607 1608 if (!skip_create) { 1609 /* Create the new image */ 1610 ret = bdrv_create(drv, out_filename, opts, &local_err); 1611 if (ret < 0) { 1612 error_report("%s: error while converting %s: %s", 1613 out_filename, out_fmt, error_get_pretty(local_err)); 1614 error_free(local_err); 1615 goto out; 1616 } 1617 } 1618 1619 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1620 ret = bdrv_parse_cache_flags(cache, &flags); 1621 if (ret < 0) { 1622 error_report("Invalid cache option: %s", cache); 1623 goto out; 1624 } 1625 1626 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1627 if (!out_blk) { 1628 ret = -1; 1629 goto out; 1630 } 1631 out_bs = blk_bs(out_blk); 1632 1633 bs_i = 0; 1634 bs_offset = 0; 1635 1636 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1637 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1638 * as maximum. */ 1639 bufsectors = MIN(32768, 1640 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1641 out_bs->bl.discard_alignment)) 1642 ); 1643 1644 buf = blk_blockalign(out_blk, bufsectors * BDRV_SECTOR_SIZE); 1645 1646 if (skip_create) { 1647 int64_t output_sectors = blk_nb_sectors(out_blk); 1648 if (output_sectors < 0) { 1649 error_report("unable to get output image length: %s", 1650 strerror(-output_sectors)); 1651 ret = -1; 1652 goto out; 1653 } else if (output_sectors < total_sectors) { 1654 error_report("output file is smaller than input file"); 1655 ret = -1; 1656 goto out; 1657 } 1658 } 1659 1660 cluster_sectors = 0; 1661 ret = bdrv_get_info(out_bs, &bdi); 1662 if (ret < 0) { 1663 if (compress) { 1664 error_report("could not get block driver info"); 1665 goto out; 1666 } 1667 } else { 1668 compress = compress || bdi.needs_compressed_writes; 1669 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1670 } 1671 1672 if (compress) { 1673 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) { 1674 error_report("invalid cluster size"); 1675 ret = -1; 1676 goto out; 1677 } 1678 sector_num = 0; 1679 1680 nb_sectors = total_sectors; 1681 1682 for(;;) { 1683 int64_t bs_num; 1684 int remainder; 1685 uint8_t *buf2; 1686 1687 nb_sectors = total_sectors - sector_num; 1688 if (nb_sectors <= 0) 1689 break; 1690 if (nb_sectors >= cluster_sectors) 1691 n = cluster_sectors; 1692 else 1693 n = nb_sectors; 1694 1695 bs_num = sector_num - bs_offset; 1696 assert (bs_num >= 0); 1697 remainder = n; 1698 buf2 = buf; 1699 while (remainder > 0) { 1700 int nlow; 1701 while (bs_num == bs_sectors[bs_i]) { 1702 bs_offset += bs_sectors[bs_i]; 1703 bs_i++; 1704 assert (bs_i < bs_n); 1705 bs_num = 0; 1706 /* printf("changing part: sector_num=%" PRId64 ", " 1707 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 1708 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */ 1709 } 1710 assert (bs_num < bs_sectors[bs_i]); 1711 1712 nlow = remainder > bs_sectors[bs_i] - bs_num 1713 ? bs_sectors[bs_i] - bs_num : remainder; 1714 1715 ret = blk_read(blk[bs_i], bs_num, buf2, nlow); 1716 if (ret < 0) { 1717 error_report("error while reading sector %" PRId64 ": %s", 1718 bs_num, strerror(-ret)); 1719 goto out; 1720 } 1721 1722 buf2 += nlow * 512; 1723 bs_num += nlow; 1724 1725 remainder -= nlow; 1726 } 1727 assert (remainder == 0); 1728 1729 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) { 1730 ret = blk_write_compressed(out_blk, sector_num, buf, n); 1731 if (ret != 0) { 1732 error_report("error while compressing sector %" PRId64 1733 ": %s", sector_num, strerror(-ret)); 1734 goto out; 1735 } 1736 } 1737 sector_num += n; 1738 qemu_progress_print(100.0 * sector_num / total_sectors, 0); 1739 } 1740 /* signal EOF to align */ 1741 blk_write_compressed(out_blk, 0, NULL, 0); 1742 } else { 1743 int64_t sectors_to_read, sectors_read, sector_num_next_status; 1744 bool count_allocated_sectors; 1745 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0; 1746 1747 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) { 1748 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP); 1749 if (ret < 0) { 1750 goto out; 1751 } 1752 has_zero_init = 1; 1753 } 1754 1755 sectors_to_read = total_sectors; 1756 count_allocated_sectors = progress && (out_baseimg || has_zero_init); 1757 restart: 1758 sector_num = 0; // total number of sectors converted so far 1759 sectors_read = 0; 1760 sector_num_next_status = 0; 1761 1762 for(;;) { 1763 nb_sectors = total_sectors - sector_num; 1764 if (nb_sectors <= 0) { 1765 if (count_allocated_sectors) { 1766 sectors_to_read = sectors_read; 1767 count_allocated_sectors = false; 1768 goto restart; 1769 } 1770 ret = 0; 1771 break; 1772 } 1773 1774 while (sector_num - bs_offset >= bs_sectors[bs_i]) { 1775 bs_offset += bs_sectors[bs_i]; 1776 bs_i ++; 1777 assert (bs_i < bs_n); 1778 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, " 1779 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n", 1780 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */ 1781 } 1782 1783 if ((out_baseimg || has_zero_init) && 1784 sector_num >= sector_num_next_status) { 1785 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors; 1786 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset, 1787 n, &n1); 1788 if (ret < 0) { 1789 error_report("error while reading block status of sector %" 1790 PRId64 ": %s", sector_num - bs_offset, 1791 strerror(-ret)); 1792 goto out; 1793 } 1794 /* If the output image is zero initialized, we are not working 1795 * on a shared base and the input is zero we can skip the next 1796 * n1 sectors */ 1797 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) { 1798 sector_num += n1; 1799 continue; 1800 } 1801 /* If the output image is being created as a copy on write 1802 * image, assume that sectors which are unallocated in the 1803 * input image are present in both the output's and input's 1804 * base images (no need to copy them). */ 1805 if (out_baseimg) { 1806 if (!(ret & BDRV_BLOCK_DATA)) { 1807 sector_num += n1; 1808 continue; 1809 } 1810 /* The next 'n1' sectors are allocated in the input image. 1811 * Copy only those as they may be followed by unallocated 1812 * sectors. */ 1813 nb_sectors = n1; 1814 } 1815 /* avoid redundant callouts to get_block_status */ 1816 sector_num_next_status = sector_num + n1; 1817 } 1818 1819 n = MIN(nb_sectors, bufsectors); 1820 1821 /* round down request length to an aligned sector, but 1822 * do not bother doing this on short requests. They happen 1823 * when we found an all-zero area, and the next sector to 1824 * write will not be sector_num + n. */ 1825 if (cluster_sectors > 0 && n >= cluster_sectors) { 1826 int64_t next_aligned_sector = (sector_num + n); 1827 next_aligned_sector -= next_aligned_sector % cluster_sectors; 1828 if (sector_num + n > next_aligned_sector) { 1829 n = next_aligned_sector - sector_num; 1830 } 1831 } 1832 1833 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset)); 1834 1835 sectors_read += n; 1836 if (count_allocated_sectors) { 1837 sector_num += n; 1838 continue; 1839 } 1840 1841 n1 = n; 1842 ret = blk_read(blk[bs_i], sector_num - bs_offset, buf, n); 1843 if (ret < 0) { 1844 error_report("error while reading sector %" PRId64 ": %s", 1845 sector_num - bs_offset, strerror(-ret)); 1846 goto out; 1847 } 1848 /* NOTE: at the same time we convert, we do not write zero 1849 sectors to have a chance to compress the image. Ideally, we 1850 should add a specific call to have the info to go faster */ 1851 buf1 = buf; 1852 while (n > 0) { 1853 if (!has_zero_init || 1854 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { 1855 ret = blk_write(out_blk, sector_num, buf1, n1); 1856 if (ret < 0) { 1857 error_report("error while writing sector %" PRId64 1858 ": %s", sector_num, strerror(-ret)); 1859 goto out; 1860 } 1861 } 1862 sector_num += n1; 1863 n -= n1; 1864 buf1 += n1 * 512; 1865 } 1866 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0); 1867 } 1868 } 1869 out: 1870 if (!ret) { 1871 qemu_progress_print(100, 0); 1872 } 1873 qemu_progress_end(); 1874 qemu_opts_del(opts); 1875 qemu_opts_free(create_opts); 1876 qemu_vfree(buf); 1877 qemu_opts_del(sn_opts); 1878 blk_unref(out_blk); 1879 g_free(bs); 1880 if (blk) { 1881 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1882 blk_unref(blk[bs_i]); 1883 } 1884 g_free(blk); 1885 } 1886 g_free(bs_sectors); 1887 fail_getopt: 1888 g_free(options); 1889 1890 if (ret) { 1891 return 1; 1892 } 1893 return 0; 1894 } 1895 1896 1897 static void dump_snapshots(BlockDriverState *bs) 1898 { 1899 QEMUSnapshotInfo *sn_tab, *sn; 1900 int nb_sns, i; 1901 1902 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1903 if (nb_sns <= 0) 1904 return; 1905 printf("Snapshot list:\n"); 1906 bdrv_snapshot_dump(fprintf, stdout, NULL); 1907 printf("\n"); 1908 for(i = 0; i < nb_sns; i++) { 1909 sn = &sn_tab[i]; 1910 bdrv_snapshot_dump(fprintf, stdout, sn); 1911 printf("\n"); 1912 } 1913 g_free(sn_tab); 1914 } 1915 1916 static void dump_json_image_info_list(ImageInfoList *list) 1917 { 1918 Error *local_err = NULL; 1919 QString *str; 1920 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1921 QObject *obj; 1922 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1923 &list, NULL, &local_err); 1924 obj = qmp_output_get_qobject(ov); 1925 str = qobject_to_json_pretty(obj); 1926 assert(str != NULL); 1927 printf("%s\n", qstring_get_str(str)); 1928 qobject_decref(obj); 1929 qmp_output_visitor_cleanup(ov); 1930 QDECREF(str); 1931 } 1932 1933 static void dump_json_image_info(ImageInfo *info) 1934 { 1935 Error *local_err = NULL; 1936 QString *str; 1937 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1938 QObject *obj; 1939 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1940 &info, NULL, &local_err); 1941 obj = qmp_output_get_qobject(ov); 1942 str = qobject_to_json_pretty(obj); 1943 assert(str != NULL); 1944 printf("%s\n", qstring_get_str(str)); 1945 qobject_decref(obj); 1946 qmp_output_visitor_cleanup(ov); 1947 QDECREF(str); 1948 } 1949 1950 static void dump_human_image_info_list(ImageInfoList *list) 1951 { 1952 ImageInfoList *elem; 1953 bool delim = false; 1954 1955 for (elem = list; elem; elem = elem->next) { 1956 if (delim) { 1957 printf("\n"); 1958 } 1959 delim = true; 1960 1961 bdrv_image_info_dump(fprintf, stdout, elem->value); 1962 } 1963 } 1964 1965 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1966 { 1967 return strcmp(a, b) == 0; 1968 } 1969 1970 /** 1971 * Open an image file chain and return an ImageInfoList 1972 * 1973 * @filename: topmost image filename 1974 * @fmt: topmost image format (may be NULL to autodetect) 1975 * @chain: true - enumerate entire backing file chain 1976 * false - only topmost image file 1977 * 1978 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1979 * image file. If there was an error a message will have been printed to 1980 * stderr. 1981 */ 1982 static ImageInfoList *collect_image_info_list(const char *filename, 1983 const char *fmt, 1984 bool chain) 1985 { 1986 ImageInfoList *head = NULL; 1987 ImageInfoList **last = &head; 1988 GHashTable *filenames; 1989 Error *err = NULL; 1990 1991 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 1992 1993 while (filename) { 1994 BlockBackend *blk; 1995 BlockDriverState *bs; 1996 ImageInfo *info; 1997 ImageInfoList *elem; 1998 1999 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2000 error_report("Backing file '%s' creates an infinite loop.", 2001 filename); 2002 goto err; 2003 } 2004 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2005 2006 blk = img_open("image", filename, fmt, 2007 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2008 if (!blk) { 2009 goto err; 2010 } 2011 bs = blk_bs(blk); 2012 2013 bdrv_query_image_info(bs, &info, &err); 2014 if (err) { 2015 error_report_err(err); 2016 blk_unref(blk); 2017 goto err; 2018 } 2019 2020 elem = g_new0(ImageInfoList, 1); 2021 elem->value = info; 2022 *last = elem; 2023 last = &elem->next; 2024 2025 blk_unref(blk); 2026 2027 filename = fmt = NULL; 2028 if (chain) { 2029 if (info->has_full_backing_filename) { 2030 filename = info->full_backing_filename; 2031 } else if (info->has_backing_filename) { 2032 filename = info->backing_filename; 2033 } 2034 if (info->has_backing_filename_format) { 2035 fmt = info->backing_filename_format; 2036 } 2037 } 2038 } 2039 g_hash_table_destroy(filenames); 2040 return head; 2041 2042 err: 2043 qapi_free_ImageInfoList(head); 2044 g_hash_table_destroy(filenames); 2045 return NULL; 2046 } 2047 2048 static int img_info(int argc, char **argv) 2049 { 2050 int c; 2051 OutputFormat output_format = OFORMAT_HUMAN; 2052 bool chain = false; 2053 const char *filename, *fmt, *output; 2054 ImageInfoList *list; 2055 2056 fmt = NULL; 2057 output = NULL; 2058 for(;;) { 2059 int option_index = 0; 2060 static const struct option long_options[] = { 2061 {"help", no_argument, 0, 'h'}, 2062 {"format", required_argument, 0, 'f'}, 2063 {"output", required_argument, 0, OPTION_OUTPUT}, 2064 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2065 {0, 0, 0, 0} 2066 }; 2067 c = getopt_long(argc, argv, "f:h", 2068 long_options, &option_index); 2069 if (c == -1) { 2070 break; 2071 } 2072 switch(c) { 2073 case '?': 2074 case 'h': 2075 help(); 2076 break; 2077 case 'f': 2078 fmt = optarg; 2079 break; 2080 case OPTION_OUTPUT: 2081 output = optarg; 2082 break; 2083 case OPTION_BACKING_CHAIN: 2084 chain = true; 2085 break; 2086 } 2087 } 2088 if (optind != argc - 1) { 2089 error_exit("Expecting one image file name"); 2090 } 2091 filename = argv[optind++]; 2092 2093 if (output && !strcmp(output, "json")) { 2094 output_format = OFORMAT_JSON; 2095 } else if (output && !strcmp(output, "human")) { 2096 output_format = OFORMAT_HUMAN; 2097 } else if (output) { 2098 error_report("--output must be used with human or json as argument."); 2099 return 1; 2100 } 2101 2102 list = collect_image_info_list(filename, fmt, chain); 2103 if (!list) { 2104 return 1; 2105 } 2106 2107 switch (output_format) { 2108 case OFORMAT_HUMAN: 2109 dump_human_image_info_list(list); 2110 break; 2111 case OFORMAT_JSON: 2112 if (chain) { 2113 dump_json_image_info_list(list); 2114 } else { 2115 dump_json_image_info(list->value); 2116 } 2117 break; 2118 } 2119 2120 qapi_free_ImageInfoList(list); 2121 return 0; 2122 } 2123 2124 2125 typedef struct MapEntry { 2126 int flags; 2127 int depth; 2128 int64_t start; 2129 int64_t length; 2130 int64_t offset; 2131 BlockDriverState *bs; 2132 } MapEntry; 2133 2134 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2135 MapEntry *next) 2136 { 2137 switch (output_format) { 2138 case OFORMAT_HUMAN: 2139 if ((e->flags & BDRV_BLOCK_DATA) && 2140 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2141 error_report("File contains external, encrypted or compressed clusters."); 2142 exit(1); 2143 } 2144 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2145 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2146 e->start, e->length, e->offset, e->bs->filename); 2147 } 2148 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2149 * Modify the flags here to allow more coalescing. 2150 */ 2151 if (next && 2152 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2153 next->flags &= ~BDRV_BLOCK_DATA; 2154 next->flags |= BDRV_BLOCK_ZERO; 2155 } 2156 break; 2157 case OFORMAT_JSON: 2158 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2159 " \"zero\": %s, \"data\": %s", 2160 (e->start == 0 ? "[" : ",\n"), 2161 e->start, e->length, e->depth, 2162 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2163 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2164 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2165 printf(", \"offset\": %"PRId64"", e->offset); 2166 } 2167 putchar('}'); 2168 2169 if (!next) { 2170 printf("]\n"); 2171 } 2172 break; 2173 } 2174 } 2175 2176 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2177 int nb_sectors, MapEntry *e) 2178 { 2179 int64_t ret; 2180 int depth; 2181 2182 /* As an optimization, we could cache the current range of unallocated 2183 * clusters in each file of the chain, and avoid querying the same 2184 * range repeatedly. 2185 */ 2186 2187 depth = 0; 2188 for (;;) { 2189 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2190 if (ret < 0) { 2191 return ret; 2192 } 2193 assert(nb_sectors); 2194 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2195 break; 2196 } 2197 bs = bs->backing_hd; 2198 if (bs == NULL) { 2199 ret = 0; 2200 break; 2201 } 2202 2203 depth++; 2204 } 2205 2206 e->start = sector_num * BDRV_SECTOR_SIZE; 2207 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2208 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2209 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2210 e->depth = depth; 2211 e->bs = bs; 2212 return 0; 2213 } 2214 2215 static int img_map(int argc, char **argv) 2216 { 2217 int c; 2218 OutputFormat output_format = OFORMAT_HUMAN; 2219 BlockBackend *blk; 2220 BlockDriverState *bs; 2221 const char *filename, *fmt, *output; 2222 int64_t length; 2223 MapEntry curr = { .length = 0 }, next; 2224 int ret = 0; 2225 2226 fmt = NULL; 2227 output = NULL; 2228 for (;;) { 2229 int option_index = 0; 2230 static const struct option long_options[] = { 2231 {"help", no_argument, 0, 'h'}, 2232 {"format", required_argument, 0, 'f'}, 2233 {"output", required_argument, 0, OPTION_OUTPUT}, 2234 {0, 0, 0, 0} 2235 }; 2236 c = getopt_long(argc, argv, "f:h", 2237 long_options, &option_index); 2238 if (c == -1) { 2239 break; 2240 } 2241 switch (c) { 2242 case '?': 2243 case 'h': 2244 help(); 2245 break; 2246 case 'f': 2247 fmt = optarg; 2248 break; 2249 case OPTION_OUTPUT: 2250 output = optarg; 2251 break; 2252 } 2253 } 2254 if (optind != argc - 1) { 2255 error_exit("Expecting one image file name"); 2256 } 2257 filename = argv[optind]; 2258 2259 if (output && !strcmp(output, "json")) { 2260 output_format = OFORMAT_JSON; 2261 } else if (output && !strcmp(output, "human")) { 2262 output_format = OFORMAT_HUMAN; 2263 } else if (output) { 2264 error_report("--output must be used with human or json as argument."); 2265 return 1; 2266 } 2267 2268 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2269 if (!blk) { 2270 return 1; 2271 } 2272 bs = blk_bs(blk); 2273 2274 if (output_format == OFORMAT_HUMAN) { 2275 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2276 } 2277 2278 length = blk_getlength(blk); 2279 while (curr.start + curr.length < length) { 2280 int64_t nsectors_left; 2281 int64_t sector_num; 2282 int n; 2283 2284 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2285 2286 /* Probe up to 1 GiB at a time. */ 2287 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2288 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2289 ret = get_block_status(bs, sector_num, n, &next); 2290 2291 if (ret < 0) { 2292 error_report("Could not read file metadata: %s", strerror(-ret)); 2293 goto out; 2294 } 2295 2296 if (curr.length != 0 && curr.flags == next.flags && 2297 curr.depth == next.depth && 2298 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2299 curr.offset + curr.length == next.offset)) { 2300 curr.length += next.length; 2301 continue; 2302 } 2303 2304 if (curr.length > 0) { 2305 dump_map_entry(output_format, &curr, &next); 2306 } 2307 curr = next; 2308 } 2309 2310 dump_map_entry(output_format, &curr, NULL); 2311 2312 out: 2313 blk_unref(blk); 2314 return ret < 0; 2315 } 2316 2317 #define SNAPSHOT_LIST 1 2318 #define SNAPSHOT_CREATE 2 2319 #define SNAPSHOT_APPLY 3 2320 #define SNAPSHOT_DELETE 4 2321 2322 static int img_snapshot(int argc, char **argv) 2323 { 2324 BlockBackend *blk; 2325 BlockDriverState *bs; 2326 QEMUSnapshotInfo sn; 2327 char *filename, *snapshot_name = NULL; 2328 int c, ret = 0, bdrv_oflags; 2329 int action = 0; 2330 qemu_timeval tv; 2331 bool quiet = false; 2332 Error *err = NULL; 2333 2334 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2335 /* Parse commandline parameters */ 2336 for(;;) { 2337 c = getopt(argc, argv, "la:c:d:hq"); 2338 if (c == -1) { 2339 break; 2340 } 2341 switch(c) { 2342 case '?': 2343 case 'h': 2344 help(); 2345 return 0; 2346 case 'l': 2347 if (action) { 2348 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2349 return 0; 2350 } 2351 action = SNAPSHOT_LIST; 2352 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2353 break; 2354 case 'a': 2355 if (action) { 2356 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2357 return 0; 2358 } 2359 action = SNAPSHOT_APPLY; 2360 snapshot_name = optarg; 2361 break; 2362 case 'c': 2363 if (action) { 2364 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2365 return 0; 2366 } 2367 action = SNAPSHOT_CREATE; 2368 snapshot_name = optarg; 2369 break; 2370 case 'd': 2371 if (action) { 2372 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2373 return 0; 2374 } 2375 action = SNAPSHOT_DELETE; 2376 snapshot_name = optarg; 2377 break; 2378 case 'q': 2379 quiet = true; 2380 break; 2381 } 2382 } 2383 2384 if (optind != argc - 1) { 2385 error_exit("Expecting one image file name"); 2386 } 2387 filename = argv[optind++]; 2388 2389 /* Open the image */ 2390 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2391 if (!blk) { 2392 return 1; 2393 } 2394 bs = blk_bs(blk); 2395 2396 /* Perform the requested action */ 2397 switch(action) { 2398 case SNAPSHOT_LIST: 2399 dump_snapshots(bs); 2400 break; 2401 2402 case SNAPSHOT_CREATE: 2403 memset(&sn, 0, sizeof(sn)); 2404 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2405 2406 qemu_gettimeofday(&tv); 2407 sn.date_sec = tv.tv_sec; 2408 sn.date_nsec = tv.tv_usec * 1000; 2409 2410 ret = bdrv_snapshot_create(bs, &sn); 2411 if (ret) { 2412 error_report("Could not create snapshot '%s': %d (%s)", 2413 snapshot_name, ret, strerror(-ret)); 2414 } 2415 break; 2416 2417 case SNAPSHOT_APPLY: 2418 ret = bdrv_snapshot_goto(bs, snapshot_name); 2419 if (ret) { 2420 error_report("Could not apply snapshot '%s': %d (%s)", 2421 snapshot_name, ret, strerror(-ret)); 2422 } 2423 break; 2424 2425 case SNAPSHOT_DELETE: 2426 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2427 if (err) { 2428 error_report("Could not delete snapshot '%s': (%s)", 2429 snapshot_name, error_get_pretty(err)); 2430 error_free(err); 2431 ret = 1; 2432 } 2433 break; 2434 } 2435 2436 /* Cleanup */ 2437 blk_unref(blk); 2438 if (ret) { 2439 return 1; 2440 } 2441 return 0; 2442 } 2443 2444 static int img_rebase(int argc, char **argv) 2445 { 2446 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2447 BlockDriverState *bs = NULL; 2448 char *filename; 2449 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2450 int c, flags, src_flags, ret; 2451 int unsafe = 0; 2452 int progress = 0; 2453 bool quiet = false; 2454 Error *local_err = NULL; 2455 2456 /* Parse commandline parameters */ 2457 fmt = NULL; 2458 cache = BDRV_DEFAULT_CACHE; 2459 src_cache = BDRV_DEFAULT_CACHE; 2460 out_baseimg = NULL; 2461 out_basefmt = NULL; 2462 for(;;) { 2463 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2464 if (c == -1) { 2465 break; 2466 } 2467 switch(c) { 2468 case '?': 2469 case 'h': 2470 help(); 2471 return 0; 2472 case 'f': 2473 fmt = optarg; 2474 break; 2475 case 'F': 2476 out_basefmt = optarg; 2477 break; 2478 case 'b': 2479 out_baseimg = optarg; 2480 break; 2481 case 'u': 2482 unsafe = 1; 2483 break; 2484 case 'p': 2485 progress = 1; 2486 break; 2487 case 't': 2488 cache = optarg; 2489 break; 2490 case 'T': 2491 src_cache = optarg; 2492 break; 2493 case 'q': 2494 quiet = true; 2495 break; 2496 } 2497 } 2498 2499 if (quiet) { 2500 progress = 0; 2501 } 2502 2503 if (optind != argc - 1) { 2504 error_exit("Expecting one image file name"); 2505 } 2506 if (!unsafe && !out_baseimg) { 2507 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2508 } 2509 filename = argv[optind++]; 2510 2511 qemu_progress_init(progress, 2.0); 2512 qemu_progress_print(0, 100); 2513 2514 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2515 ret = bdrv_parse_cache_flags(cache, &flags); 2516 if (ret < 0) { 2517 error_report("Invalid cache option: %s", cache); 2518 goto out; 2519 } 2520 2521 src_flags = BDRV_O_FLAGS; 2522 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2523 if (ret < 0) { 2524 error_report("Invalid source cache option: %s", src_cache); 2525 goto out; 2526 } 2527 2528 /* 2529 * Open the images. 2530 * 2531 * Ignore the old backing file for unsafe rebase in case we want to correct 2532 * the reference to a renamed or moved backing file. 2533 */ 2534 blk = img_open("image", filename, fmt, flags, true, quiet); 2535 if (!blk) { 2536 ret = -1; 2537 goto out; 2538 } 2539 bs = blk_bs(blk); 2540 2541 if (out_basefmt != NULL) { 2542 if (bdrv_find_format(out_basefmt) == NULL) { 2543 error_report("Invalid format name: '%s'", out_basefmt); 2544 ret = -1; 2545 goto out; 2546 } 2547 } 2548 2549 /* For safe rebasing we need to compare old and new backing file */ 2550 if (!unsafe) { 2551 char backing_name[PATH_MAX]; 2552 QDict *options = NULL; 2553 2554 if (bs->backing_format[0] != '\0') { 2555 options = qdict_new(); 2556 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2557 } 2558 2559 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2560 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2561 options, src_flags, &local_err); 2562 if (!blk_old_backing) { 2563 error_report("Could not open old backing file '%s': %s", 2564 backing_name, error_get_pretty(local_err)); 2565 error_free(local_err); 2566 goto out; 2567 } 2568 2569 if (out_baseimg[0]) { 2570 if (out_basefmt) { 2571 options = qdict_new(); 2572 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2573 } else { 2574 options = NULL; 2575 } 2576 2577 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2578 options, src_flags, &local_err); 2579 if (!blk_new_backing) { 2580 error_report("Could not open new backing file '%s': %s", 2581 out_baseimg, error_get_pretty(local_err)); 2582 error_free(local_err); 2583 goto out; 2584 } 2585 } 2586 } 2587 2588 /* 2589 * Check each unallocated cluster in the COW file. If it is unallocated, 2590 * accesses go to the backing file. We must therefore compare this cluster 2591 * in the old and new backing file, and if they differ we need to copy it 2592 * from the old backing file into the COW file. 2593 * 2594 * If qemu-img crashes during this step, no harm is done. The content of 2595 * the image is the same as the original one at any time. 2596 */ 2597 if (!unsafe) { 2598 int64_t num_sectors; 2599 int64_t old_backing_num_sectors; 2600 int64_t new_backing_num_sectors = 0; 2601 uint64_t sector; 2602 int n; 2603 uint8_t * buf_old; 2604 uint8_t * buf_new; 2605 float local_progress = 0; 2606 2607 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2608 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2609 2610 num_sectors = blk_nb_sectors(blk); 2611 if (num_sectors < 0) { 2612 error_report("Could not get size of '%s': %s", 2613 filename, strerror(-num_sectors)); 2614 ret = -1; 2615 goto out; 2616 } 2617 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2618 if (old_backing_num_sectors < 0) { 2619 char backing_name[PATH_MAX]; 2620 2621 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2622 error_report("Could not get size of '%s': %s", 2623 backing_name, strerror(-old_backing_num_sectors)); 2624 ret = -1; 2625 goto out; 2626 } 2627 if (blk_new_backing) { 2628 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2629 if (new_backing_num_sectors < 0) { 2630 error_report("Could not get size of '%s': %s", 2631 out_baseimg, strerror(-new_backing_num_sectors)); 2632 ret = -1; 2633 goto out; 2634 } 2635 } 2636 2637 if (num_sectors != 0) { 2638 local_progress = (float)100 / 2639 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2640 } 2641 2642 for (sector = 0; sector < num_sectors; sector += n) { 2643 2644 /* How many sectors can we handle with the next read? */ 2645 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2646 n = (IO_BUF_SIZE / 512); 2647 } else { 2648 n = num_sectors - sector; 2649 } 2650 2651 /* If the cluster is allocated, we don't need to take action */ 2652 ret = bdrv_is_allocated(bs, sector, n, &n); 2653 if (ret < 0) { 2654 error_report("error while reading image metadata: %s", 2655 strerror(-ret)); 2656 goto out; 2657 } 2658 if (ret) { 2659 continue; 2660 } 2661 2662 /* 2663 * Read old and new backing file and take into consideration that 2664 * backing files may be smaller than the COW image. 2665 */ 2666 if (sector >= old_backing_num_sectors) { 2667 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2668 } else { 2669 if (sector + n > old_backing_num_sectors) { 2670 n = old_backing_num_sectors - sector; 2671 } 2672 2673 ret = blk_read(blk_old_backing, sector, buf_old, n); 2674 if (ret < 0) { 2675 error_report("error while reading from old backing file"); 2676 goto out; 2677 } 2678 } 2679 2680 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2681 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2682 } else { 2683 if (sector + n > new_backing_num_sectors) { 2684 n = new_backing_num_sectors - sector; 2685 } 2686 2687 ret = blk_read(blk_new_backing, sector, buf_new, n); 2688 if (ret < 0) { 2689 error_report("error while reading from new backing file"); 2690 goto out; 2691 } 2692 } 2693 2694 /* If they differ, we need to write to the COW file */ 2695 uint64_t written = 0; 2696 2697 while (written < n) { 2698 int pnum; 2699 2700 if (compare_sectors(buf_old + written * 512, 2701 buf_new + written * 512, n - written, &pnum)) 2702 { 2703 ret = blk_write(blk, sector + written, 2704 buf_old + written * 512, pnum); 2705 if (ret < 0) { 2706 error_report("Error while writing to COW image: %s", 2707 strerror(-ret)); 2708 goto out; 2709 } 2710 } 2711 2712 written += pnum; 2713 } 2714 qemu_progress_print(local_progress, 100); 2715 } 2716 2717 qemu_vfree(buf_old); 2718 qemu_vfree(buf_new); 2719 } 2720 2721 /* 2722 * Change the backing file. All clusters that are different from the old 2723 * backing file are overwritten in the COW file now, so the visible content 2724 * doesn't change when we switch the backing file. 2725 */ 2726 if (out_baseimg && *out_baseimg) { 2727 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2728 } else { 2729 ret = bdrv_change_backing_file(bs, NULL, NULL); 2730 } 2731 2732 if (ret == -ENOSPC) { 2733 error_report("Could not change the backing file to '%s': No " 2734 "space left in the file header", out_baseimg); 2735 } else if (ret < 0) { 2736 error_report("Could not change the backing file to '%s': %s", 2737 out_baseimg, strerror(-ret)); 2738 } 2739 2740 qemu_progress_print(100, 0); 2741 /* 2742 * TODO At this point it is possible to check if any clusters that are 2743 * allocated in the COW file are the same in the backing file. If so, they 2744 * could be dropped from the COW file. Don't do this before switching the 2745 * backing file, in case of a crash this would lead to corruption. 2746 */ 2747 out: 2748 qemu_progress_end(); 2749 /* Cleanup */ 2750 if (!unsafe) { 2751 blk_unref(blk_old_backing); 2752 blk_unref(blk_new_backing); 2753 } 2754 2755 blk_unref(blk); 2756 if (ret) { 2757 return 1; 2758 } 2759 return 0; 2760 } 2761 2762 static int img_resize(int argc, char **argv) 2763 { 2764 Error *err = NULL; 2765 int c, ret, relative; 2766 const char *filename, *fmt, *size; 2767 int64_t n, total_size; 2768 bool quiet = false; 2769 BlockBackend *blk = NULL; 2770 QemuOpts *param; 2771 static QemuOptsList resize_options = { 2772 .name = "resize_options", 2773 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2774 .desc = { 2775 { 2776 .name = BLOCK_OPT_SIZE, 2777 .type = QEMU_OPT_SIZE, 2778 .help = "Virtual disk size" 2779 }, { 2780 /* end of list */ 2781 } 2782 }, 2783 }; 2784 2785 /* Remove size from argv manually so that negative numbers are not treated 2786 * as options by getopt. */ 2787 if (argc < 3) { 2788 error_exit("Not enough arguments"); 2789 return 1; 2790 } 2791 2792 size = argv[--argc]; 2793 2794 /* Parse getopt arguments */ 2795 fmt = NULL; 2796 for(;;) { 2797 c = getopt(argc, argv, "f:hq"); 2798 if (c == -1) { 2799 break; 2800 } 2801 switch(c) { 2802 case '?': 2803 case 'h': 2804 help(); 2805 break; 2806 case 'f': 2807 fmt = optarg; 2808 break; 2809 case 'q': 2810 quiet = true; 2811 break; 2812 } 2813 } 2814 if (optind != argc - 1) { 2815 error_exit("Expecting one image file name"); 2816 } 2817 filename = argv[optind++]; 2818 2819 /* Choose grow, shrink, or absolute resize mode */ 2820 switch (size[0]) { 2821 case '+': 2822 relative = 1; 2823 size++; 2824 break; 2825 case '-': 2826 relative = -1; 2827 size++; 2828 break; 2829 default: 2830 relative = 0; 2831 break; 2832 } 2833 2834 /* Parse size */ 2835 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2836 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2837 if (err) { 2838 error_report_err(err); 2839 ret = -1; 2840 qemu_opts_del(param); 2841 goto out; 2842 } 2843 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2844 qemu_opts_del(param); 2845 2846 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2847 true, quiet); 2848 if (!blk) { 2849 ret = -1; 2850 goto out; 2851 } 2852 2853 if (relative) { 2854 total_size = blk_getlength(blk) + n * relative; 2855 } else { 2856 total_size = n; 2857 } 2858 if (total_size <= 0) { 2859 error_report("New image size must be positive"); 2860 ret = -1; 2861 goto out; 2862 } 2863 2864 ret = blk_truncate(blk, total_size); 2865 switch (ret) { 2866 case 0: 2867 qprintf(quiet, "Image resized.\n"); 2868 break; 2869 case -ENOTSUP: 2870 error_report("This image does not support resize"); 2871 break; 2872 case -EACCES: 2873 error_report("Image is read-only"); 2874 break; 2875 default: 2876 error_report("Error resizing image (%d)", -ret); 2877 break; 2878 } 2879 out: 2880 blk_unref(blk); 2881 if (ret) { 2882 return 1; 2883 } 2884 return 0; 2885 } 2886 2887 static void amend_status_cb(BlockDriverState *bs, 2888 int64_t offset, int64_t total_work_size) 2889 { 2890 qemu_progress_print(100.f * offset / total_work_size, 0); 2891 } 2892 2893 static int img_amend(int argc, char **argv) 2894 { 2895 Error *err = NULL; 2896 int c, ret = 0; 2897 char *options = NULL; 2898 QemuOptsList *create_opts = NULL; 2899 QemuOpts *opts = NULL; 2900 const char *fmt = NULL, *filename, *cache; 2901 int flags; 2902 bool quiet = false, progress = false; 2903 BlockBackend *blk = NULL; 2904 BlockDriverState *bs = NULL; 2905 2906 cache = BDRV_DEFAULT_CACHE; 2907 for (;;) { 2908 c = getopt(argc, argv, "ho:f:t:pq"); 2909 if (c == -1) { 2910 break; 2911 } 2912 2913 switch (c) { 2914 case 'h': 2915 case '?': 2916 help(); 2917 break; 2918 case 'o': 2919 if (!is_valid_option_list(optarg)) { 2920 error_report("Invalid option list: %s", optarg); 2921 ret = -1; 2922 goto out; 2923 } 2924 if (!options) { 2925 options = g_strdup(optarg); 2926 } else { 2927 char *old_options = options; 2928 options = g_strdup_printf("%s,%s", options, optarg); 2929 g_free(old_options); 2930 } 2931 break; 2932 case 'f': 2933 fmt = optarg; 2934 break; 2935 case 't': 2936 cache = optarg; 2937 break; 2938 case 'p': 2939 progress = true; 2940 break; 2941 case 'q': 2942 quiet = true; 2943 break; 2944 } 2945 } 2946 2947 if (!options) { 2948 error_exit("Must specify options (-o)"); 2949 } 2950 2951 if (quiet) { 2952 progress = false; 2953 } 2954 qemu_progress_init(progress, 1.0); 2955 2956 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2957 if (fmt && has_help_option(options)) { 2958 /* If a format is explicitly specified (and possibly no filename is 2959 * given), print option help here */ 2960 ret = print_block_option_help(filename, fmt); 2961 goto out; 2962 } 2963 2964 if (optind != argc - 1) { 2965 error_report("Expecting one image file name"); 2966 ret = -1; 2967 goto out; 2968 } 2969 2970 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2971 ret = bdrv_parse_cache_flags(cache, &flags); 2972 if (ret < 0) { 2973 error_report("Invalid cache option: %s", cache); 2974 goto out; 2975 } 2976 2977 blk = img_open("image", filename, fmt, flags, true, quiet); 2978 if (!blk) { 2979 ret = -1; 2980 goto out; 2981 } 2982 bs = blk_bs(blk); 2983 2984 fmt = bs->drv->format_name; 2985 2986 if (has_help_option(options)) { 2987 /* If the format was auto-detected, print option help here */ 2988 ret = print_block_option_help(filename, fmt); 2989 goto out; 2990 } 2991 2992 if (!bs->drv->create_opts) { 2993 error_report("Format driver '%s' does not support any options to amend", 2994 fmt); 2995 ret = -1; 2996 goto out; 2997 } 2998 2999 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3000 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3001 if (options) { 3002 qemu_opts_do_parse(opts, options, NULL, &err); 3003 if (err) { 3004 error_report("Invalid options for file format '%s'", fmt); 3005 error_free(err); 3006 ret = -1; 3007 goto out; 3008 } 3009 } 3010 3011 /* In case the driver does not call amend_status_cb() */ 3012 qemu_progress_print(0.f, 0); 3013 ret = bdrv_amend_options(bs, opts, &amend_status_cb); 3014 qemu_progress_print(100.f, 0); 3015 if (ret < 0) { 3016 error_report("Error while amending options: %s", strerror(-ret)); 3017 goto out; 3018 } 3019 3020 out: 3021 qemu_progress_end(); 3022 3023 blk_unref(blk); 3024 qemu_opts_del(opts); 3025 qemu_opts_free(create_opts); 3026 g_free(options); 3027 3028 if (ret) { 3029 return 1; 3030 } 3031 return 0; 3032 } 3033 3034 static const img_cmd_t img_cmds[] = { 3035 #define DEF(option, callback, arg_string) \ 3036 { option, callback }, 3037 #include "qemu-img-cmds.h" 3038 #undef DEF 3039 #undef GEN_DOCS 3040 { NULL, NULL, }, 3041 }; 3042 3043 int main(int argc, char **argv) 3044 { 3045 const img_cmd_t *cmd; 3046 const char *cmdname; 3047 Error *local_error = NULL; 3048 int c; 3049 static const struct option long_options[] = { 3050 {"help", no_argument, 0, 'h'}, 3051 {"version", no_argument, 0, 'v'}, 3052 {0, 0, 0, 0} 3053 }; 3054 3055 #ifdef CONFIG_POSIX 3056 signal(SIGPIPE, SIG_IGN); 3057 #endif 3058 3059 error_set_progname(argv[0]); 3060 qemu_init_exec_dir(argv[0]); 3061 3062 if (qemu_init_main_loop(&local_error)) { 3063 error_report_err(local_error); 3064 exit(EXIT_FAILURE); 3065 } 3066 3067 bdrv_init(); 3068 if (argc < 2) { 3069 error_exit("Not enough arguments"); 3070 } 3071 cmdname = argv[1]; 3072 3073 /* find the command */ 3074 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3075 if (!strcmp(cmdname, cmd->name)) { 3076 return cmd->handler(argc - 1, argv + 1); 3077 } 3078 } 3079 3080 c = getopt_long(argc, argv, "h", long_options, NULL); 3081 3082 if (c == 'h') { 3083 help(); 3084 } 3085 if (c == 'v') { 3086 printf(QEMU_IMG_VERSION); 3087 return 0; 3088 } 3089 3090 /* not found */ 3091 error_exit("Command not found: %s", cmdname); 3092 } 3093