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