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 \ 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; 264 265 /* Find driver and parse its options */ 266 drv = bdrv_find_format(fmt); 267 if (!drv) { 268 error_report("Unknown file format '%s'", fmt); 269 return 1; 270 } 271 272 create_opts = qemu_opts_append(create_opts, drv->create_opts); 273 if (filename) { 274 proto_drv = bdrv_find_protocol(filename, true); 275 if (!proto_drv) { 276 error_report("Unknown protocol '%s'", filename); 277 qemu_opts_free(create_opts); 278 return 1; 279 } 280 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 281 } 282 283 qemu_opts_print_help(create_opts); 284 qemu_opts_free(create_opts); 285 return 0; 286 } 287 288 static BlockBackend *img_open(const char *id, const char *filename, 289 const char *fmt, int flags, 290 bool require_io, bool quiet) 291 { 292 BlockBackend *blk; 293 BlockDriverState *bs; 294 BlockDriver *drv; 295 char password[256]; 296 Error *local_err = NULL; 297 int ret; 298 299 blk = blk_new_with_bs(id, &error_abort); 300 bs = blk_bs(blk); 301 302 if (fmt) { 303 drv = bdrv_find_format(fmt); 304 if (!drv) { 305 error_report("Unknown file format '%s'", fmt); 306 goto fail; 307 } 308 } else { 309 drv = NULL; 310 } 311 312 ret = bdrv_open(&bs, filename, NULL, NULL, flags, drv, &local_err); 313 if (ret < 0) { 314 error_report("Could not open '%s': %s", filename, 315 error_get_pretty(local_err)); 316 error_free(local_err); 317 goto fail; 318 } 319 320 if (bdrv_is_encrypted(bs) && require_io) { 321 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 322 if (read_password(password, sizeof(password)) < 0) { 323 error_report("No password given"); 324 goto fail; 325 } 326 if (bdrv_set_key(bs, password) < 0) { 327 error_report("invalid password"); 328 goto fail; 329 } 330 } 331 return blk; 332 fail: 333 blk_unref(blk); 334 return NULL; 335 } 336 337 static int add_old_style_options(const char *fmt, QemuOpts *opts, 338 const char *base_filename, 339 const char *base_fmt) 340 { 341 if (base_filename) { 342 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename)) { 343 error_report("Backing file not supported for file format '%s'", 344 fmt); 345 return -1; 346 } 347 } 348 if (base_fmt) { 349 if (qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt)) { 350 error_report("Backing file format not supported for file " 351 "format '%s'", fmt); 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 qerror_report_err(local_err); 893 error_free(local_err); 894 return 1; 895 } 896 897 qprintf(quiet, "Image committed.\n"); 898 return 0; 899 } 900 901 /* 902 * Returns true iff the first sector pointed to by 'buf' contains at least 903 * a non-NUL byte. 904 * 905 * 'pnum' is set to the number of sectors (including and immediately following 906 * the first one) that are known to be in the same allocated/unallocated state. 907 */ 908 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 909 { 910 bool is_zero; 911 int i; 912 913 if (n <= 0) { 914 *pnum = 0; 915 return 0; 916 } 917 is_zero = buffer_is_zero(buf, 512); 918 for(i = 1; i < n; i++) { 919 buf += 512; 920 if (is_zero != buffer_is_zero(buf, 512)) { 921 break; 922 } 923 } 924 *pnum = i; 925 return !is_zero; 926 } 927 928 /* 929 * Like is_allocated_sectors, but if the buffer starts with a used sector, 930 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 931 * breaking up write requests for only small sparse areas. 932 */ 933 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 934 int min) 935 { 936 int ret; 937 int num_checked, num_used; 938 939 if (n < min) { 940 min = n; 941 } 942 943 ret = is_allocated_sectors(buf, n, pnum); 944 if (!ret) { 945 return ret; 946 } 947 948 num_used = *pnum; 949 buf += BDRV_SECTOR_SIZE * *pnum; 950 n -= *pnum; 951 num_checked = num_used; 952 953 while (n > 0) { 954 ret = is_allocated_sectors(buf, n, pnum); 955 956 buf += BDRV_SECTOR_SIZE * *pnum; 957 n -= *pnum; 958 num_checked += *pnum; 959 if (ret) { 960 num_used = num_checked; 961 } else if (*pnum >= min) { 962 break; 963 } 964 } 965 966 *pnum = num_used; 967 return 1; 968 } 969 970 /* 971 * Compares two buffers sector by sector. Returns 0 if the first sector of both 972 * buffers matches, non-zero otherwise. 973 * 974 * pnum is set to the number of sectors (including and immediately following 975 * the first one) that are known to have the same comparison result 976 */ 977 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 978 int *pnum) 979 { 980 int res, 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 bs: Driver used for accessing file 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(BlockDriverState *bs, 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 = bdrv_read(bs, 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 error_report("Can't open file %s", filename1); 1130 ret = 2; 1131 goto out3; 1132 } 1133 bs1 = blk_bs(blk1); 1134 1135 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1136 if (!blk2) { 1137 error_report("Can't open file %s", filename2); 1138 ret = 2; 1139 goto out2; 1140 } 1141 bs2 = blk_bs(blk2); 1142 1143 buf1 = qemu_blockalign(bs1, IO_BUF_SIZE); 1144 buf2 = qemu_blockalign(bs2, IO_BUF_SIZE); 1145 total_sectors1 = bdrv_nb_sectors(bs1); 1146 if (total_sectors1 < 0) { 1147 error_report("Can't get size of %s: %s", 1148 filename1, strerror(-total_sectors1)); 1149 ret = 4; 1150 goto out; 1151 } 1152 total_sectors2 = bdrv_nb_sectors(bs2); 1153 if (total_sectors2 < 0) { 1154 error_report("Can't get size of %s: %s", 1155 filename2, strerror(-total_sectors2)); 1156 ret = 4; 1157 goto out; 1158 } 1159 total_sectors = MIN(total_sectors1, total_sectors2); 1160 progress_base = MAX(total_sectors1, total_sectors2); 1161 1162 qemu_progress_print(0, 100); 1163 1164 if (strict && total_sectors1 != total_sectors2) { 1165 ret = 1; 1166 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1167 goto out; 1168 } 1169 1170 for (;;) { 1171 nb_sectors = sectors_to_process(total_sectors, sector_num); 1172 if (nb_sectors <= 0) { 1173 break; 1174 } 1175 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, 1176 &pnum1); 1177 if (allocated1 < 0) { 1178 ret = 3; 1179 error_report("Sector allocation test failed for %s", filename1); 1180 goto out; 1181 } 1182 1183 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, 1184 &pnum2); 1185 if (allocated2 < 0) { 1186 ret = 3; 1187 error_report("Sector allocation test failed for %s", filename2); 1188 goto out; 1189 } 1190 nb_sectors = MIN(pnum1, pnum2); 1191 1192 if (allocated1 == allocated2) { 1193 if (allocated1) { 1194 ret = bdrv_read(bs1, sector_num, buf1, nb_sectors); 1195 if (ret < 0) { 1196 error_report("Error while reading offset %" PRId64 " of %s:" 1197 " %s", sectors_to_bytes(sector_num), filename1, 1198 strerror(-ret)); 1199 ret = 4; 1200 goto out; 1201 } 1202 ret = bdrv_read(bs2, sector_num, buf2, nb_sectors); 1203 if (ret < 0) { 1204 error_report("Error while reading offset %" PRId64 1205 " of %s: %s", sectors_to_bytes(sector_num), 1206 filename2, strerror(-ret)); 1207 ret = 4; 1208 goto out; 1209 } 1210 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1211 if (ret || pnum != nb_sectors) { 1212 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1213 sectors_to_bytes( 1214 ret ? sector_num : sector_num + pnum)); 1215 ret = 1; 1216 goto out; 1217 } 1218 } 1219 } else { 1220 if (strict) { 1221 ret = 1; 1222 qprintf(quiet, "Strict mode: Offset %" PRId64 1223 " allocation mismatch!\n", 1224 sectors_to_bytes(sector_num)); 1225 goto out; 1226 } 1227 1228 if (allocated1) { 1229 ret = check_empty_sectors(bs1, sector_num, nb_sectors, 1230 filename1, buf1, quiet); 1231 } else { 1232 ret = check_empty_sectors(bs2, sector_num, nb_sectors, 1233 filename2, buf1, quiet); 1234 } 1235 if (ret) { 1236 if (ret < 0) { 1237 error_report("Error while reading offset %" PRId64 ": %s", 1238 sectors_to_bytes(sector_num), strerror(-ret)); 1239 ret = 4; 1240 } 1241 goto out; 1242 } 1243 } 1244 sector_num += nb_sectors; 1245 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1246 } 1247 1248 if (total_sectors1 != total_sectors2) { 1249 BlockDriverState *bs_over; 1250 int64_t total_sectors_over; 1251 const char *filename_over; 1252 1253 qprintf(quiet, "Warning: Image size mismatch!\n"); 1254 if (total_sectors1 > total_sectors2) { 1255 total_sectors_over = total_sectors1; 1256 bs_over = bs1; 1257 filename_over = filename1; 1258 } else { 1259 total_sectors_over = total_sectors2; 1260 bs_over = bs2; 1261 filename_over = filename2; 1262 } 1263 1264 for (;;) { 1265 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1266 if (nb_sectors <= 0) { 1267 break; 1268 } 1269 ret = bdrv_is_allocated_above(bs_over, NULL, sector_num, 1270 nb_sectors, &pnum); 1271 if (ret < 0) { 1272 ret = 3; 1273 error_report("Sector allocation test failed for %s", 1274 filename_over); 1275 goto out; 1276 1277 } 1278 nb_sectors = pnum; 1279 if (ret) { 1280 ret = check_empty_sectors(bs_over, sector_num, nb_sectors, 1281 filename_over, buf1, quiet); 1282 if (ret) { 1283 if (ret < 0) { 1284 error_report("Error while reading offset %" PRId64 1285 " of %s: %s", sectors_to_bytes(sector_num), 1286 filename_over, strerror(-ret)); 1287 ret = 4; 1288 } 1289 goto out; 1290 } 1291 } 1292 sector_num += nb_sectors; 1293 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1294 } 1295 } 1296 1297 qprintf(quiet, "Images are identical.\n"); 1298 ret = 0; 1299 1300 out: 1301 qemu_vfree(buf1); 1302 qemu_vfree(buf2); 1303 blk_unref(blk2); 1304 out2: 1305 blk_unref(blk1); 1306 out3: 1307 qemu_progress_end(); 1308 return ret; 1309 } 1310 1311 static int img_convert(int argc, char **argv) 1312 { 1313 int c, n, n1, bs_n, bs_i, compress, cluster_sectors, skip_create; 1314 int64_t ret = 0; 1315 int progress = 0, flags, src_flags; 1316 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1317 BlockDriver *drv, *proto_drv; 1318 BlockBackend **blk = NULL, *out_blk = NULL; 1319 BlockDriverState **bs = NULL, *out_bs = NULL; 1320 int64_t total_sectors, nb_sectors, sector_num, bs_offset; 1321 int64_t *bs_sectors = NULL; 1322 uint8_t * buf = NULL; 1323 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1324 const uint8_t *buf1; 1325 BlockDriverInfo bdi; 1326 QemuOpts *opts = NULL; 1327 QemuOptsList *create_opts = NULL; 1328 const char *out_baseimg_param; 1329 char *options = NULL; 1330 const char *snapshot_name = NULL; 1331 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1332 bool quiet = false; 1333 Error *local_err = NULL; 1334 QemuOpts *sn_opts = NULL; 1335 1336 fmt = NULL; 1337 out_fmt = "raw"; 1338 cache = "unsafe"; 1339 src_cache = BDRV_DEFAULT_CACHE; 1340 out_baseimg = NULL; 1341 compress = 0; 1342 skip_create = 0; 1343 for(;;) { 1344 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1345 if (c == -1) { 1346 break; 1347 } 1348 switch(c) { 1349 case '?': 1350 case 'h': 1351 help(); 1352 break; 1353 case 'f': 1354 fmt = optarg; 1355 break; 1356 case 'O': 1357 out_fmt = optarg; 1358 break; 1359 case 'B': 1360 out_baseimg = optarg; 1361 break; 1362 case 'c': 1363 compress = 1; 1364 break; 1365 case 'e': 1366 error_report("option -e is deprecated, please use \'-o " 1367 "encryption\' instead!"); 1368 ret = -1; 1369 goto fail_getopt; 1370 case '6': 1371 error_report("option -6 is deprecated, please use \'-o " 1372 "compat6\' instead!"); 1373 ret = -1; 1374 goto fail_getopt; 1375 case 'o': 1376 if (!is_valid_option_list(optarg)) { 1377 error_report("Invalid option list: %s", optarg); 1378 ret = -1; 1379 goto fail_getopt; 1380 } 1381 if (!options) { 1382 options = g_strdup(optarg); 1383 } else { 1384 char *old_options = options; 1385 options = g_strdup_printf("%s,%s", options, optarg); 1386 g_free(old_options); 1387 } 1388 break; 1389 case 's': 1390 snapshot_name = optarg; 1391 break; 1392 case 'l': 1393 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1394 sn_opts = qemu_opts_parse(&internal_snapshot_opts, optarg, 0); 1395 if (!sn_opts) { 1396 error_report("Failed in parsing snapshot param '%s'", 1397 optarg); 1398 ret = -1; 1399 goto fail_getopt; 1400 } 1401 } else { 1402 snapshot_name = optarg; 1403 } 1404 break; 1405 case 'S': 1406 { 1407 int64_t sval; 1408 char *end; 1409 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); 1410 if (sval < 0 || *end) { 1411 error_report("Invalid minimum zero buffer size for sparse output specified"); 1412 ret = -1; 1413 goto fail_getopt; 1414 } 1415 1416 min_sparse = sval / BDRV_SECTOR_SIZE; 1417 break; 1418 } 1419 case 'p': 1420 progress = 1; 1421 break; 1422 case 't': 1423 cache = optarg; 1424 break; 1425 case 'T': 1426 src_cache = optarg; 1427 break; 1428 case 'q': 1429 quiet = true; 1430 break; 1431 case 'n': 1432 skip_create = 1; 1433 break; 1434 } 1435 } 1436 1437 /* Initialize before goto out */ 1438 if (quiet) { 1439 progress = 0; 1440 } 1441 qemu_progress_init(progress, 1.0); 1442 1443 1444 bs_n = argc - optind - 1; 1445 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1446 1447 if (options && has_help_option(options)) { 1448 ret = print_block_option_help(out_filename, out_fmt); 1449 goto out; 1450 } 1451 1452 if (bs_n < 1) { 1453 error_exit("Must specify image file name"); 1454 } 1455 1456 1457 if (bs_n > 1 && out_baseimg) { 1458 error_report("-B makes no sense when concatenating multiple input " 1459 "images"); 1460 ret = -1; 1461 goto out; 1462 } 1463 1464 src_flags = BDRV_O_FLAGS; 1465 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1466 if (ret < 0) { 1467 error_report("Invalid source cache option: %s", src_cache); 1468 goto out; 1469 } 1470 1471 qemu_progress_print(0, 100); 1472 1473 blk = g_new0(BlockBackend *, bs_n); 1474 bs = g_new0(BlockDriverState *, bs_n); 1475 bs_sectors = g_new(int64_t, bs_n); 1476 1477 total_sectors = 0; 1478 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1479 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1480 : g_strdup("source"); 1481 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1482 true, quiet); 1483 g_free(id); 1484 if (!blk[bs_i]) { 1485 error_report("Could not open '%s'", argv[optind + bs_i]); 1486 ret = -1; 1487 goto out; 1488 } 1489 bs[bs_i] = blk_bs(blk[bs_i]); 1490 bs_sectors[bs_i] = bdrv_nb_sectors(bs[bs_i]); 1491 if (bs_sectors[bs_i] < 0) { 1492 error_report("Could not get size of %s: %s", 1493 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1494 ret = -1; 1495 goto out; 1496 } 1497 total_sectors += bs_sectors[bs_i]; 1498 } 1499 1500 if (sn_opts) { 1501 ret = bdrv_snapshot_load_tmp(bs[0], 1502 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1503 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1504 &local_err); 1505 } else if (snapshot_name != NULL) { 1506 if (bs_n > 1) { 1507 error_report("No support for concatenating multiple snapshot"); 1508 ret = -1; 1509 goto out; 1510 } 1511 1512 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1513 } 1514 if (local_err) { 1515 error_report("Failed to load snapshot: %s", 1516 error_get_pretty(local_err)); 1517 error_free(local_err); 1518 ret = -1; 1519 goto out; 1520 } 1521 1522 /* Find driver and parse its options */ 1523 drv = bdrv_find_format(out_fmt); 1524 if (!drv) { 1525 error_report("Unknown file format '%s'", out_fmt); 1526 ret = -1; 1527 goto out; 1528 } 1529 1530 proto_drv = bdrv_find_protocol(out_filename, true); 1531 if (!proto_drv) { 1532 error_report("Unknown protocol '%s'", out_filename); 1533 ret = -1; 1534 goto out; 1535 } 1536 1537 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1538 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1539 1540 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1541 if (options && qemu_opts_do_parse(opts, options, NULL)) { 1542 error_report("Invalid options for file format '%s'", out_fmt); 1543 ret = -1; 1544 goto out; 1545 } 1546 1547 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512); 1548 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1549 if (ret < 0) { 1550 goto out; 1551 } 1552 1553 /* Get backing file name if -o backing_file was used */ 1554 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1555 if (out_baseimg_param) { 1556 out_baseimg = out_baseimg_param; 1557 } 1558 1559 /* Check if compression is supported */ 1560 if (compress) { 1561 bool encryption = 1562 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1563 const char *preallocation = 1564 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1565 1566 if (!drv->bdrv_write_compressed) { 1567 error_report("Compression not supported for this file format"); 1568 ret = -1; 1569 goto out; 1570 } 1571 1572 if (encryption) { 1573 error_report("Compression and encryption not supported at " 1574 "the same time"); 1575 ret = -1; 1576 goto out; 1577 } 1578 1579 if (preallocation 1580 && strcmp(preallocation, "off")) 1581 { 1582 error_report("Compression and preallocation not supported at " 1583 "the same time"); 1584 ret = -1; 1585 goto out; 1586 } 1587 } 1588 1589 if (!skip_create) { 1590 /* Create the new image */ 1591 ret = bdrv_create(drv, out_filename, opts, &local_err); 1592 if (ret < 0) { 1593 error_report("%s: error while converting %s: %s", 1594 out_filename, out_fmt, error_get_pretty(local_err)); 1595 error_free(local_err); 1596 goto out; 1597 } 1598 } 1599 1600 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1601 ret = bdrv_parse_cache_flags(cache, &flags); 1602 if (ret < 0) { 1603 error_report("Invalid cache option: %s", cache); 1604 goto out; 1605 } 1606 1607 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1608 if (!out_blk) { 1609 ret = -1; 1610 goto out; 1611 } 1612 out_bs = blk_bs(out_blk); 1613 1614 bs_i = 0; 1615 bs_offset = 0; 1616 1617 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1618 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1619 * as maximum. */ 1620 bufsectors = MIN(32768, 1621 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1622 out_bs->bl.discard_alignment)) 1623 ); 1624 1625 buf = qemu_blockalign(out_bs, bufsectors * BDRV_SECTOR_SIZE); 1626 1627 if (skip_create) { 1628 int64_t output_sectors = bdrv_nb_sectors(out_bs); 1629 if (output_sectors < 0) { 1630 error_report("unable to get output image length: %s\n", 1631 strerror(-output_sectors)); 1632 ret = -1; 1633 goto out; 1634 } else if (output_sectors < total_sectors) { 1635 error_report("output file is smaller than input file"); 1636 ret = -1; 1637 goto out; 1638 } 1639 } 1640 1641 cluster_sectors = 0; 1642 ret = bdrv_get_info(out_bs, &bdi); 1643 if (ret < 0) { 1644 if (compress) { 1645 error_report("could not get block driver info"); 1646 goto out; 1647 } 1648 } else { 1649 compress = compress || bdi.needs_compressed_writes; 1650 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1651 } 1652 1653 if (compress) { 1654 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) { 1655 error_report("invalid cluster size"); 1656 ret = -1; 1657 goto out; 1658 } 1659 sector_num = 0; 1660 1661 nb_sectors = total_sectors; 1662 1663 for(;;) { 1664 int64_t bs_num; 1665 int remainder; 1666 uint8_t *buf2; 1667 1668 nb_sectors = total_sectors - sector_num; 1669 if (nb_sectors <= 0) 1670 break; 1671 if (nb_sectors >= cluster_sectors) 1672 n = cluster_sectors; 1673 else 1674 n = nb_sectors; 1675 1676 bs_num = sector_num - bs_offset; 1677 assert (bs_num >= 0); 1678 remainder = n; 1679 buf2 = buf; 1680 while (remainder > 0) { 1681 int nlow; 1682 while (bs_num == bs_sectors[bs_i]) { 1683 bs_offset += bs_sectors[bs_i]; 1684 bs_i++; 1685 assert (bs_i < bs_n); 1686 bs_num = 0; 1687 /* printf("changing part: sector_num=%" PRId64 ", " 1688 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 1689 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */ 1690 } 1691 assert (bs_num < bs_sectors[bs_i]); 1692 1693 nlow = remainder > bs_sectors[bs_i] - bs_num 1694 ? bs_sectors[bs_i] - bs_num : remainder; 1695 1696 ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); 1697 if (ret < 0) { 1698 error_report("error while reading sector %" PRId64 ": %s", 1699 bs_num, strerror(-ret)); 1700 goto out; 1701 } 1702 1703 buf2 += nlow * 512; 1704 bs_num += nlow; 1705 1706 remainder -= nlow; 1707 } 1708 assert (remainder == 0); 1709 1710 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) { 1711 ret = bdrv_write_compressed(out_bs, sector_num, buf, n); 1712 if (ret != 0) { 1713 error_report("error while compressing sector %" PRId64 1714 ": %s", sector_num, strerror(-ret)); 1715 goto out; 1716 } 1717 } 1718 sector_num += n; 1719 qemu_progress_print(100.0 * sector_num / total_sectors, 0); 1720 } 1721 /* signal EOF to align */ 1722 bdrv_write_compressed(out_bs, 0, NULL, 0); 1723 } else { 1724 int64_t sectors_to_read, sectors_read, sector_num_next_status; 1725 bool count_allocated_sectors; 1726 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0; 1727 1728 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) { 1729 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP); 1730 if (ret < 0) { 1731 goto out; 1732 } 1733 has_zero_init = 1; 1734 } 1735 1736 sectors_to_read = total_sectors; 1737 count_allocated_sectors = progress && (out_baseimg || has_zero_init); 1738 restart: 1739 sector_num = 0; // total number of sectors converted so far 1740 sectors_read = 0; 1741 sector_num_next_status = 0; 1742 1743 for(;;) { 1744 nb_sectors = total_sectors - sector_num; 1745 if (nb_sectors <= 0) { 1746 if (count_allocated_sectors) { 1747 sectors_to_read = sectors_read; 1748 count_allocated_sectors = false; 1749 goto restart; 1750 } 1751 ret = 0; 1752 break; 1753 } 1754 1755 while (sector_num - bs_offset >= bs_sectors[bs_i]) { 1756 bs_offset += bs_sectors[bs_i]; 1757 bs_i ++; 1758 assert (bs_i < bs_n); 1759 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, " 1760 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n", 1761 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */ 1762 } 1763 1764 if ((out_baseimg || has_zero_init) && 1765 sector_num >= sector_num_next_status) { 1766 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors; 1767 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset, 1768 n, &n1); 1769 if (ret < 0) { 1770 error_report("error while reading block status of sector %" 1771 PRId64 ": %s", sector_num - bs_offset, 1772 strerror(-ret)); 1773 goto out; 1774 } 1775 /* If the output image is zero initialized, we are not working 1776 * on a shared base and the input is zero we can skip the next 1777 * n1 sectors */ 1778 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) { 1779 sector_num += n1; 1780 continue; 1781 } 1782 /* If the output image is being created as a copy on write 1783 * image, assume that sectors which are unallocated in the 1784 * input image are present in both the output's and input's 1785 * base images (no need to copy them). */ 1786 if (out_baseimg) { 1787 if (!(ret & BDRV_BLOCK_DATA)) { 1788 sector_num += n1; 1789 continue; 1790 } 1791 /* The next 'n1' sectors are allocated in the input image. 1792 * Copy only those as they may be followed by unallocated 1793 * sectors. */ 1794 nb_sectors = n1; 1795 } 1796 /* avoid redundant callouts to get_block_status */ 1797 sector_num_next_status = sector_num + n1; 1798 } 1799 1800 n = MIN(nb_sectors, bufsectors); 1801 1802 /* round down request length to an aligned sector, but 1803 * do not bother doing this on short requests. They happen 1804 * when we found an all-zero area, and the next sector to 1805 * write will not be sector_num + n. */ 1806 if (cluster_sectors > 0 && n >= cluster_sectors) { 1807 int64_t next_aligned_sector = (sector_num + n); 1808 next_aligned_sector -= next_aligned_sector % cluster_sectors; 1809 if (sector_num + n > next_aligned_sector) { 1810 n = next_aligned_sector - sector_num; 1811 } 1812 } 1813 1814 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset)); 1815 1816 sectors_read += n; 1817 if (count_allocated_sectors) { 1818 sector_num += n; 1819 continue; 1820 } 1821 1822 n1 = n; 1823 ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); 1824 if (ret < 0) { 1825 error_report("error while reading sector %" PRId64 ": %s", 1826 sector_num - bs_offset, strerror(-ret)); 1827 goto out; 1828 } 1829 /* NOTE: at the same time we convert, we do not write zero 1830 sectors to have a chance to compress the image. Ideally, we 1831 should add a specific call to have the info to go faster */ 1832 buf1 = buf; 1833 while (n > 0) { 1834 if (!has_zero_init || 1835 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { 1836 ret = bdrv_write(out_bs, sector_num, buf1, n1); 1837 if (ret < 0) { 1838 error_report("error while writing sector %" PRId64 1839 ": %s", sector_num, strerror(-ret)); 1840 goto out; 1841 } 1842 } 1843 sector_num += n1; 1844 n -= n1; 1845 buf1 += n1 * 512; 1846 } 1847 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0); 1848 } 1849 } 1850 out: 1851 if (!ret) { 1852 qemu_progress_print(100, 0); 1853 } 1854 qemu_progress_end(); 1855 qemu_opts_del(opts); 1856 qemu_opts_free(create_opts); 1857 qemu_vfree(buf); 1858 qemu_opts_del(sn_opts); 1859 blk_unref(out_blk); 1860 g_free(bs); 1861 if (blk) { 1862 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1863 blk_unref(blk[bs_i]); 1864 } 1865 g_free(blk); 1866 } 1867 g_free(bs_sectors); 1868 fail_getopt: 1869 g_free(options); 1870 1871 if (ret) { 1872 return 1; 1873 } 1874 return 0; 1875 } 1876 1877 1878 static void dump_snapshots(BlockDriverState *bs) 1879 { 1880 QEMUSnapshotInfo *sn_tab, *sn; 1881 int nb_sns, i; 1882 1883 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1884 if (nb_sns <= 0) 1885 return; 1886 printf("Snapshot list:\n"); 1887 bdrv_snapshot_dump(fprintf, stdout, NULL); 1888 printf("\n"); 1889 for(i = 0; i < nb_sns; i++) { 1890 sn = &sn_tab[i]; 1891 bdrv_snapshot_dump(fprintf, stdout, sn); 1892 printf("\n"); 1893 } 1894 g_free(sn_tab); 1895 } 1896 1897 static void dump_json_image_info_list(ImageInfoList *list) 1898 { 1899 Error *local_err = NULL; 1900 QString *str; 1901 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1902 QObject *obj; 1903 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1904 &list, NULL, &local_err); 1905 obj = qmp_output_get_qobject(ov); 1906 str = qobject_to_json_pretty(obj); 1907 assert(str != NULL); 1908 printf("%s\n", qstring_get_str(str)); 1909 qobject_decref(obj); 1910 qmp_output_visitor_cleanup(ov); 1911 QDECREF(str); 1912 } 1913 1914 static void dump_json_image_info(ImageInfo *info) 1915 { 1916 Error *local_err = NULL; 1917 QString *str; 1918 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1919 QObject *obj; 1920 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1921 &info, NULL, &local_err); 1922 obj = qmp_output_get_qobject(ov); 1923 str = qobject_to_json_pretty(obj); 1924 assert(str != NULL); 1925 printf("%s\n", qstring_get_str(str)); 1926 qobject_decref(obj); 1927 qmp_output_visitor_cleanup(ov); 1928 QDECREF(str); 1929 } 1930 1931 static void dump_human_image_info_list(ImageInfoList *list) 1932 { 1933 ImageInfoList *elem; 1934 bool delim = false; 1935 1936 for (elem = list; elem; elem = elem->next) { 1937 if (delim) { 1938 printf("\n"); 1939 } 1940 delim = true; 1941 1942 bdrv_image_info_dump(fprintf, stdout, elem->value); 1943 } 1944 } 1945 1946 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1947 { 1948 return strcmp(a, b) == 0; 1949 } 1950 1951 /** 1952 * Open an image file chain and return an ImageInfoList 1953 * 1954 * @filename: topmost image filename 1955 * @fmt: topmost image format (may be NULL to autodetect) 1956 * @chain: true - enumerate entire backing file chain 1957 * false - only topmost image file 1958 * 1959 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1960 * image file. If there was an error a message will have been printed to 1961 * stderr. 1962 */ 1963 static ImageInfoList *collect_image_info_list(const char *filename, 1964 const char *fmt, 1965 bool chain) 1966 { 1967 ImageInfoList *head = NULL; 1968 ImageInfoList **last = &head; 1969 GHashTable *filenames; 1970 Error *err = NULL; 1971 1972 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 1973 1974 while (filename) { 1975 BlockBackend *blk; 1976 BlockDriverState *bs; 1977 ImageInfo *info; 1978 ImageInfoList *elem; 1979 1980 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 1981 error_report("Backing file '%s' creates an infinite loop.", 1982 filename); 1983 goto err; 1984 } 1985 g_hash_table_insert(filenames, (gpointer)filename, NULL); 1986 1987 blk = img_open("image", filename, fmt, 1988 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 1989 if (!blk) { 1990 goto err; 1991 } 1992 bs = blk_bs(blk); 1993 1994 bdrv_query_image_info(bs, &info, &err); 1995 if (err) { 1996 error_report("%s", error_get_pretty(err)); 1997 error_free(err); 1998 blk_unref(blk); 1999 goto err; 2000 } 2001 2002 elem = g_new0(ImageInfoList, 1); 2003 elem->value = info; 2004 *last = elem; 2005 last = &elem->next; 2006 2007 blk_unref(blk); 2008 2009 filename = fmt = NULL; 2010 if (chain) { 2011 if (info->has_full_backing_filename) { 2012 filename = info->full_backing_filename; 2013 } else if (info->has_backing_filename) { 2014 filename = info->backing_filename; 2015 } 2016 if (info->has_backing_filename_format) { 2017 fmt = info->backing_filename_format; 2018 } 2019 } 2020 } 2021 g_hash_table_destroy(filenames); 2022 return head; 2023 2024 err: 2025 qapi_free_ImageInfoList(head); 2026 g_hash_table_destroy(filenames); 2027 return NULL; 2028 } 2029 2030 static int img_info(int argc, char **argv) 2031 { 2032 int c; 2033 OutputFormat output_format = OFORMAT_HUMAN; 2034 bool chain = false; 2035 const char *filename, *fmt, *output; 2036 ImageInfoList *list; 2037 2038 fmt = NULL; 2039 output = NULL; 2040 for(;;) { 2041 int option_index = 0; 2042 static const struct option long_options[] = { 2043 {"help", no_argument, 0, 'h'}, 2044 {"format", required_argument, 0, 'f'}, 2045 {"output", required_argument, 0, OPTION_OUTPUT}, 2046 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2047 {0, 0, 0, 0} 2048 }; 2049 c = getopt_long(argc, argv, "f:h", 2050 long_options, &option_index); 2051 if (c == -1) { 2052 break; 2053 } 2054 switch(c) { 2055 case '?': 2056 case 'h': 2057 help(); 2058 break; 2059 case 'f': 2060 fmt = optarg; 2061 break; 2062 case OPTION_OUTPUT: 2063 output = optarg; 2064 break; 2065 case OPTION_BACKING_CHAIN: 2066 chain = true; 2067 break; 2068 } 2069 } 2070 if (optind != argc - 1) { 2071 error_exit("Expecting one image file name"); 2072 } 2073 filename = argv[optind++]; 2074 2075 if (output && !strcmp(output, "json")) { 2076 output_format = OFORMAT_JSON; 2077 } else if (output && !strcmp(output, "human")) { 2078 output_format = OFORMAT_HUMAN; 2079 } else if (output) { 2080 error_report("--output must be used with human or json as argument."); 2081 return 1; 2082 } 2083 2084 list = collect_image_info_list(filename, fmt, chain); 2085 if (!list) { 2086 return 1; 2087 } 2088 2089 switch (output_format) { 2090 case OFORMAT_HUMAN: 2091 dump_human_image_info_list(list); 2092 break; 2093 case OFORMAT_JSON: 2094 if (chain) { 2095 dump_json_image_info_list(list); 2096 } else { 2097 dump_json_image_info(list->value); 2098 } 2099 break; 2100 } 2101 2102 qapi_free_ImageInfoList(list); 2103 return 0; 2104 } 2105 2106 2107 typedef struct MapEntry { 2108 int flags; 2109 int depth; 2110 int64_t start; 2111 int64_t length; 2112 int64_t offset; 2113 BlockDriverState *bs; 2114 } MapEntry; 2115 2116 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2117 MapEntry *next) 2118 { 2119 switch (output_format) { 2120 case OFORMAT_HUMAN: 2121 if ((e->flags & BDRV_BLOCK_DATA) && 2122 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2123 error_report("File contains external, encrypted or compressed clusters."); 2124 exit(1); 2125 } 2126 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2127 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2128 e->start, e->length, e->offset, e->bs->filename); 2129 } 2130 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2131 * Modify the flags here to allow more coalescing. 2132 */ 2133 if (next && 2134 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2135 next->flags &= ~BDRV_BLOCK_DATA; 2136 next->flags |= BDRV_BLOCK_ZERO; 2137 } 2138 break; 2139 case OFORMAT_JSON: 2140 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2141 " \"zero\": %s, \"data\": %s", 2142 (e->start == 0 ? "[" : ",\n"), 2143 e->start, e->length, e->depth, 2144 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2145 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2146 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2147 printf(", \"offset\": %"PRId64"", e->offset); 2148 } 2149 putchar('}'); 2150 2151 if (!next) { 2152 printf("]\n"); 2153 } 2154 break; 2155 } 2156 } 2157 2158 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2159 int nb_sectors, MapEntry *e) 2160 { 2161 int64_t ret; 2162 int depth; 2163 2164 /* As an optimization, we could cache the current range of unallocated 2165 * clusters in each file of the chain, and avoid querying the same 2166 * range repeatedly. 2167 */ 2168 2169 depth = 0; 2170 for (;;) { 2171 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2172 if (ret < 0) { 2173 return ret; 2174 } 2175 assert(nb_sectors); 2176 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2177 break; 2178 } 2179 bs = bs->backing_hd; 2180 if (bs == NULL) { 2181 ret = 0; 2182 break; 2183 } 2184 2185 depth++; 2186 } 2187 2188 e->start = sector_num * BDRV_SECTOR_SIZE; 2189 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2190 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2191 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2192 e->depth = depth; 2193 e->bs = bs; 2194 return 0; 2195 } 2196 2197 static int img_map(int argc, char **argv) 2198 { 2199 int c; 2200 OutputFormat output_format = OFORMAT_HUMAN; 2201 BlockBackend *blk; 2202 BlockDriverState *bs; 2203 const char *filename, *fmt, *output; 2204 int64_t length; 2205 MapEntry curr = { .length = 0 }, next; 2206 int ret = 0; 2207 2208 fmt = NULL; 2209 output = NULL; 2210 for (;;) { 2211 int option_index = 0; 2212 static const struct option long_options[] = { 2213 {"help", no_argument, 0, 'h'}, 2214 {"format", required_argument, 0, 'f'}, 2215 {"output", required_argument, 0, OPTION_OUTPUT}, 2216 {0, 0, 0, 0} 2217 }; 2218 c = getopt_long(argc, argv, "f:h", 2219 long_options, &option_index); 2220 if (c == -1) { 2221 break; 2222 } 2223 switch (c) { 2224 case '?': 2225 case 'h': 2226 help(); 2227 break; 2228 case 'f': 2229 fmt = optarg; 2230 break; 2231 case OPTION_OUTPUT: 2232 output = optarg; 2233 break; 2234 } 2235 } 2236 if (optind != argc - 1) { 2237 error_exit("Expecting one image file name"); 2238 } 2239 filename = argv[optind]; 2240 2241 if (output && !strcmp(output, "json")) { 2242 output_format = OFORMAT_JSON; 2243 } else if (output && !strcmp(output, "human")) { 2244 output_format = OFORMAT_HUMAN; 2245 } else if (output) { 2246 error_report("--output must be used with human or json as argument."); 2247 return 1; 2248 } 2249 2250 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2251 if (!blk) { 2252 return 1; 2253 } 2254 bs = blk_bs(blk); 2255 2256 if (output_format == OFORMAT_HUMAN) { 2257 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2258 } 2259 2260 length = bdrv_getlength(bs); 2261 while (curr.start + curr.length < length) { 2262 int64_t nsectors_left; 2263 int64_t sector_num; 2264 int n; 2265 2266 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2267 2268 /* Probe up to 1 GiB at a time. */ 2269 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2270 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2271 ret = get_block_status(bs, sector_num, n, &next); 2272 2273 if (ret < 0) { 2274 error_report("Could not read file metadata: %s", strerror(-ret)); 2275 goto out; 2276 } 2277 2278 if (curr.length != 0 && curr.flags == next.flags && 2279 curr.depth == next.depth && 2280 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2281 curr.offset + curr.length == next.offset)) { 2282 curr.length += next.length; 2283 continue; 2284 } 2285 2286 if (curr.length > 0) { 2287 dump_map_entry(output_format, &curr, &next); 2288 } 2289 curr = next; 2290 } 2291 2292 dump_map_entry(output_format, &curr, NULL); 2293 2294 out: 2295 blk_unref(blk); 2296 return ret < 0; 2297 } 2298 2299 #define SNAPSHOT_LIST 1 2300 #define SNAPSHOT_CREATE 2 2301 #define SNAPSHOT_APPLY 3 2302 #define SNAPSHOT_DELETE 4 2303 2304 static int img_snapshot(int argc, char **argv) 2305 { 2306 BlockBackend *blk; 2307 BlockDriverState *bs; 2308 QEMUSnapshotInfo sn; 2309 char *filename, *snapshot_name = NULL; 2310 int c, ret = 0, bdrv_oflags; 2311 int action = 0; 2312 qemu_timeval tv; 2313 bool quiet = false; 2314 Error *err = NULL; 2315 2316 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2317 /* Parse commandline parameters */ 2318 for(;;) { 2319 c = getopt(argc, argv, "la:c:d:hq"); 2320 if (c == -1) { 2321 break; 2322 } 2323 switch(c) { 2324 case '?': 2325 case 'h': 2326 help(); 2327 return 0; 2328 case 'l': 2329 if (action) { 2330 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2331 return 0; 2332 } 2333 action = SNAPSHOT_LIST; 2334 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2335 break; 2336 case 'a': 2337 if (action) { 2338 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2339 return 0; 2340 } 2341 action = SNAPSHOT_APPLY; 2342 snapshot_name = optarg; 2343 break; 2344 case 'c': 2345 if (action) { 2346 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2347 return 0; 2348 } 2349 action = SNAPSHOT_CREATE; 2350 snapshot_name = optarg; 2351 break; 2352 case 'd': 2353 if (action) { 2354 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2355 return 0; 2356 } 2357 action = SNAPSHOT_DELETE; 2358 snapshot_name = optarg; 2359 break; 2360 case 'q': 2361 quiet = true; 2362 break; 2363 } 2364 } 2365 2366 if (optind != argc - 1) { 2367 error_exit("Expecting one image file name"); 2368 } 2369 filename = argv[optind++]; 2370 2371 /* Open the image */ 2372 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2373 if (!blk) { 2374 return 1; 2375 } 2376 bs = blk_bs(blk); 2377 2378 /* Perform the requested action */ 2379 switch(action) { 2380 case SNAPSHOT_LIST: 2381 dump_snapshots(bs); 2382 break; 2383 2384 case SNAPSHOT_CREATE: 2385 memset(&sn, 0, sizeof(sn)); 2386 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2387 2388 qemu_gettimeofday(&tv); 2389 sn.date_sec = tv.tv_sec; 2390 sn.date_nsec = tv.tv_usec * 1000; 2391 2392 ret = bdrv_snapshot_create(bs, &sn); 2393 if (ret) { 2394 error_report("Could not create snapshot '%s': %d (%s)", 2395 snapshot_name, ret, strerror(-ret)); 2396 } 2397 break; 2398 2399 case SNAPSHOT_APPLY: 2400 ret = bdrv_snapshot_goto(bs, snapshot_name); 2401 if (ret) { 2402 error_report("Could not apply snapshot '%s': %d (%s)", 2403 snapshot_name, ret, strerror(-ret)); 2404 } 2405 break; 2406 2407 case SNAPSHOT_DELETE: 2408 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2409 if (err) { 2410 error_report("Could not delete snapshot '%s': (%s)", 2411 snapshot_name, error_get_pretty(err)); 2412 error_free(err); 2413 ret = 1; 2414 } 2415 break; 2416 } 2417 2418 /* Cleanup */ 2419 blk_unref(blk); 2420 if (ret) { 2421 return 1; 2422 } 2423 return 0; 2424 } 2425 2426 static int img_rebase(int argc, char **argv) 2427 { 2428 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2429 BlockDriverState *bs = NULL, *bs_old_backing = NULL, *bs_new_backing = NULL; 2430 BlockDriver *old_backing_drv, *new_backing_drv; 2431 char *filename; 2432 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2433 int c, flags, src_flags, ret; 2434 int unsafe = 0; 2435 int progress = 0; 2436 bool quiet = false; 2437 Error *local_err = NULL; 2438 2439 /* Parse commandline parameters */ 2440 fmt = NULL; 2441 cache = BDRV_DEFAULT_CACHE; 2442 src_cache = BDRV_DEFAULT_CACHE; 2443 out_baseimg = NULL; 2444 out_basefmt = NULL; 2445 for(;;) { 2446 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2447 if (c == -1) { 2448 break; 2449 } 2450 switch(c) { 2451 case '?': 2452 case 'h': 2453 help(); 2454 return 0; 2455 case 'f': 2456 fmt = optarg; 2457 break; 2458 case 'F': 2459 out_basefmt = optarg; 2460 break; 2461 case 'b': 2462 out_baseimg = optarg; 2463 break; 2464 case 'u': 2465 unsafe = 1; 2466 break; 2467 case 'p': 2468 progress = 1; 2469 break; 2470 case 't': 2471 cache = optarg; 2472 break; 2473 case 'T': 2474 src_cache = optarg; 2475 break; 2476 case 'q': 2477 quiet = true; 2478 break; 2479 } 2480 } 2481 2482 if (quiet) { 2483 progress = 0; 2484 } 2485 2486 if (optind != argc - 1) { 2487 error_exit("Expecting one image file name"); 2488 } 2489 if (!unsafe && !out_baseimg) { 2490 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2491 } 2492 filename = argv[optind++]; 2493 2494 qemu_progress_init(progress, 2.0); 2495 qemu_progress_print(0, 100); 2496 2497 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2498 ret = bdrv_parse_cache_flags(cache, &flags); 2499 if (ret < 0) { 2500 error_report("Invalid cache option: %s", cache); 2501 goto out; 2502 } 2503 2504 src_flags = BDRV_O_FLAGS; 2505 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2506 if (ret < 0) { 2507 error_report("Invalid source cache option: %s", src_cache); 2508 goto out; 2509 } 2510 2511 /* 2512 * Open the images. 2513 * 2514 * Ignore the old backing file for unsafe rebase in case we want to correct 2515 * the reference to a renamed or moved backing file. 2516 */ 2517 blk = img_open("image", filename, fmt, flags, true, quiet); 2518 if (!blk) { 2519 ret = -1; 2520 goto out; 2521 } 2522 bs = blk_bs(blk); 2523 2524 /* Find the right drivers for the backing files */ 2525 old_backing_drv = NULL; 2526 new_backing_drv = NULL; 2527 2528 if (!unsafe && bs->backing_format[0] != '\0') { 2529 old_backing_drv = bdrv_find_format(bs->backing_format); 2530 if (old_backing_drv == NULL) { 2531 error_report("Invalid format name: '%s'", bs->backing_format); 2532 ret = -1; 2533 goto out; 2534 } 2535 } 2536 2537 if (out_basefmt != NULL) { 2538 new_backing_drv = bdrv_find_format(out_basefmt); 2539 if (new_backing_drv == 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[1024]; 2549 2550 blk_old_backing = blk_new_with_bs("old_backing", &error_abort); 2551 bs_old_backing = blk_bs(blk_old_backing); 2552 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2553 ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags, 2554 old_backing_drv, &local_err); 2555 if (ret) { 2556 error_report("Could not open old backing file '%s': %s", 2557 backing_name, error_get_pretty(local_err)); 2558 error_free(local_err); 2559 goto out; 2560 } 2561 if (out_baseimg[0]) { 2562 blk_new_backing = blk_new_with_bs("new_backing", &error_abort); 2563 bs_new_backing = blk_bs(blk_new_backing); 2564 ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags, 2565 new_backing_drv, &local_err); 2566 if (ret) { 2567 error_report("Could not open new backing file '%s': %s", 2568 out_baseimg, error_get_pretty(local_err)); 2569 error_free(local_err); 2570 goto out; 2571 } 2572 } 2573 } 2574 2575 /* 2576 * Check each unallocated cluster in the COW file. If it is unallocated, 2577 * accesses go to the backing file. We must therefore compare this cluster 2578 * in the old and new backing file, and if they differ we need to copy it 2579 * from the old backing file into the COW file. 2580 * 2581 * If qemu-img crashes during this step, no harm is done. The content of 2582 * the image is the same as the original one at any time. 2583 */ 2584 if (!unsafe) { 2585 int64_t num_sectors; 2586 int64_t old_backing_num_sectors; 2587 int64_t new_backing_num_sectors = 0; 2588 uint64_t sector; 2589 int n; 2590 uint8_t * buf_old; 2591 uint8_t * buf_new; 2592 float local_progress = 0; 2593 2594 buf_old = qemu_blockalign(bs, IO_BUF_SIZE); 2595 buf_new = qemu_blockalign(bs, IO_BUF_SIZE); 2596 2597 num_sectors = bdrv_nb_sectors(bs); 2598 if (num_sectors < 0) { 2599 error_report("Could not get size of '%s': %s", 2600 filename, strerror(-num_sectors)); 2601 ret = -1; 2602 goto out; 2603 } 2604 old_backing_num_sectors = bdrv_nb_sectors(bs_old_backing); 2605 if (old_backing_num_sectors < 0) { 2606 char backing_name[1024]; 2607 2608 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2609 error_report("Could not get size of '%s': %s", 2610 backing_name, strerror(-old_backing_num_sectors)); 2611 ret = -1; 2612 goto out; 2613 } 2614 if (bs_new_backing) { 2615 new_backing_num_sectors = bdrv_nb_sectors(bs_new_backing); 2616 if (new_backing_num_sectors < 0) { 2617 error_report("Could not get size of '%s': %s", 2618 out_baseimg, strerror(-new_backing_num_sectors)); 2619 ret = -1; 2620 goto out; 2621 } 2622 } 2623 2624 if (num_sectors != 0) { 2625 local_progress = (float)100 / 2626 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2627 } 2628 2629 for (sector = 0; sector < num_sectors; sector += n) { 2630 2631 /* How many sectors can we handle with the next read? */ 2632 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2633 n = (IO_BUF_SIZE / 512); 2634 } else { 2635 n = num_sectors - sector; 2636 } 2637 2638 /* If the cluster is allocated, we don't need to take action */ 2639 ret = bdrv_is_allocated(bs, sector, n, &n); 2640 if (ret < 0) { 2641 error_report("error while reading image metadata: %s", 2642 strerror(-ret)); 2643 goto out; 2644 } 2645 if (ret) { 2646 continue; 2647 } 2648 2649 /* 2650 * Read old and new backing file and take into consideration that 2651 * backing files may be smaller than the COW image. 2652 */ 2653 if (sector >= old_backing_num_sectors) { 2654 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2655 } else { 2656 if (sector + n > old_backing_num_sectors) { 2657 n = old_backing_num_sectors - sector; 2658 } 2659 2660 ret = bdrv_read(bs_old_backing, sector, buf_old, n); 2661 if (ret < 0) { 2662 error_report("error while reading from old backing file"); 2663 goto out; 2664 } 2665 } 2666 2667 if (sector >= new_backing_num_sectors || !bs_new_backing) { 2668 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2669 } else { 2670 if (sector + n > new_backing_num_sectors) { 2671 n = new_backing_num_sectors - sector; 2672 } 2673 2674 ret = bdrv_read(bs_new_backing, sector, buf_new, n); 2675 if (ret < 0) { 2676 error_report("error while reading from new backing file"); 2677 goto out; 2678 } 2679 } 2680 2681 /* If they differ, we need to write to the COW file */ 2682 uint64_t written = 0; 2683 2684 while (written < n) { 2685 int pnum; 2686 2687 if (compare_sectors(buf_old + written * 512, 2688 buf_new + written * 512, n - written, &pnum)) 2689 { 2690 ret = bdrv_write(bs, sector + written, 2691 buf_old + written * 512, pnum); 2692 if (ret < 0) { 2693 error_report("Error while writing to COW image: %s", 2694 strerror(-ret)); 2695 goto out; 2696 } 2697 } 2698 2699 written += pnum; 2700 } 2701 qemu_progress_print(local_progress, 100); 2702 } 2703 2704 qemu_vfree(buf_old); 2705 qemu_vfree(buf_new); 2706 } 2707 2708 /* 2709 * Change the backing file. All clusters that are different from the old 2710 * backing file are overwritten in the COW file now, so the visible content 2711 * doesn't change when we switch the backing file. 2712 */ 2713 if (out_baseimg && *out_baseimg) { 2714 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2715 } else { 2716 ret = bdrv_change_backing_file(bs, NULL, NULL); 2717 } 2718 2719 if (ret == -ENOSPC) { 2720 error_report("Could not change the backing file to '%s': No " 2721 "space left in the file header", out_baseimg); 2722 } else if (ret < 0) { 2723 error_report("Could not change the backing file to '%s': %s", 2724 out_baseimg, strerror(-ret)); 2725 } 2726 2727 qemu_progress_print(100, 0); 2728 /* 2729 * TODO At this point it is possible to check if any clusters that are 2730 * allocated in the COW file are the same in the backing file. If so, they 2731 * could be dropped from the COW file. Don't do this before switching the 2732 * backing file, in case of a crash this would lead to corruption. 2733 */ 2734 out: 2735 qemu_progress_end(); 2736 /* Cleanup */ 2737 if (!unsafe) { 2738 blk_unref(blk_old_backing); 2739 blk_unref(blk_new_backing); 2740 } 2741 2742 blk_unref(blk); 2743 if (ret) { 2744 return 1; 2745 } 2746 return 0; 2747 } 2748 2749 static int img_resize(int argc, char **argv) 2750 { 2751 int c, ret, relative; 2752 const char *filename, *fmt, *size; 2753 int64_t n, total_size; 2754 bool quiet = false; 2755 BlockBackend *blk = NULL; 2756 BlockDriverState *bs = NULL; 2757 QemuOpts *param; 2758 static QemuOptsList resize_options = { 2759 .name = "resize_options", 2760 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2761 .desc = { 2762 { 2763 .name = BLOCK_OPT_SIZE, 2764 .type = QEMU_OPT_SIZE, 2765 .help = "Virtual disk size" 2766 }, { 2767 /* end of list */ 2768 } 2769 }, 2770 }; 2771 2772 /* Remove size from argv manually so that negative numbers are not treated 2773 * as options by getopt. */ 2774 if (argc < 3) { 2775 error_exit("Not enough arguments"); 2776 return 1; 2777 } 2778 2779 size = argv[--argc]; 2780 2781 /* Parse getopt arguments */ 2782 fmt = NULL; 2783 for(;;) { 2784 c = getopt(argc, argv, "f:hq"); 2785 if (c == -1) { 2786 break; 2787 } 2788 switch(c) { 2789 case '?': 2790 case 'h': 2791 help(); 2792 break; 2793 case 'f': 2794 fmt = optarg; 2795 break; 2796 case 'q': 2797 quiet = true; 2798 break; 2799 } 2800 } 2801 if (optind != argc - 1) { 2802 error_exit("Expecting one image file name"); 2803 } 2804 filename = argv[optind++]; 2805 2806 /* Choose grow, shrink, or absolute resize mode */ 2807 switch (size[0]) { 2808 case '+': 2809 relative = 1; 2810 size++; 2811 break; 2812 case '-': 2813 relative = -1; 2814 size++; 2815 break; 2816 default: 2817 relative = 0; 2818 break; 2819 } 2820 2821 /* Parse size */ 2822 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2823 if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) { 2824 /* Error message already printed when size parsing fails */ 2825 ret = -1; 2826 qemu_opts_del(param); 2827 goto out; 2828 } 2829 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2830 qemu_opts_del(param); 2831 2832 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2833 true, quiet); 2834 if (!blk) { 2835 ret = -1; 2836 goto out; 2837 } 2838 bs = blk_bs(blk); 2839 2840 if (relative) { 2841 total_size = bdrv_getlength(bs) + n * relative; 2842 } else { 2843 total_size = n; 2844 } 2845 if (total_size <= 0) { 2846 error_report("New image size must be positive"); 2847 ret = -1; 2848 goto out; 2849 } 2850 2851 ret = bdrv_truncate(bs, total_size); 2852 switch (ret) { 2853 case 0: 2854 qprintf(quiet, "Image resized.\n"); 2855 break; 2856 case -ENOTSUP: 2857 error_report("This image does not support resize"); 2858 break; 2859 case -EACCES: 2860 error_report("Image is read-only"); 2861 break; 2862 default: 2863 error_report("Error resizing image (%d)", -ret); 2864 break; 2865 } 2866 out: 2867 blk_unref(blk); 2868 if (ret) { 2869 return 1; 2870 } 2871 return 0; 2872 } 2873 2874 static void amend_status_cb(BlockDriverState *bs, 2875 int64_t offset, int64_t total_work_size) 2876 { 2877 qemu_progress_print(100.f * offset / total_work_size, 0); 2878 } 2879 2880 static int img_amend(int argc, char **argv) 2881 { 2882 int c, ret = 0; 2883 char *options = NULL; 2884 QemuOptsList *create_opts = NULL; 2885 QemuOpts *opts = NULL; 2886 const char *fmt = NULL, *filename, *cache; 2887 int flags; 2888 bool quiet = false, progress = false; 2889 BlockBackend *blk = NULL; 2890 BlockDriverState *bs = NULL; 2891 2892 cache = BDRV_DEFAULT_CACHE; 2893 for (;;) { 2894 c = getopt(argc, argv, "ho:f:t:pq"); 2895 if (c == -1) { 2896 break; 2897 } 2898 2899 switch (c) { 2900 case 'h': 2901 case '?': 2902 help(); 2903 break; 2904 case 'o': 2905 if (!is_valid_option_list(optarg)) { 2906 error_report("Invalid option list: %s", optarg); 2907 ret = -1; 2908 goto out; 2909 } 2910 if (!options) { 2911 options = g_strdup(optarg); 2912 } else { 2913 char *old_options = options; 2914 options = g_strdup_printf("%s,%s", options, optarg); 2915 g_free(old_options); 2916 } 2917 break; 2918 case 'f': 2919 fmt = optarg; 2920 break; 2921 case 't': 2922 cache = optarg; 2923 break; 2924 case 'p': 2925 progress = true; 2926 break; 2927 case 'q': 2928 quiet = true; 2929 break; 2930 } 2931 } 2932 2933 if (!options) { 2934 error_exit("Must specify options (-o)"); 2935 } 2936 2937 if (quiet) { 2938 progress = false; 2939 } 2940 qemu_progress_init(progress, 1.0); 2941 2942 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2943 if (fmt && has_help_option(options)) { 2944 /* If a format is explicitly specified (and possibly no filename is 2945 * given), print option help here */ 2946 ret = print_block_option_help(filename, fmt); 2947 goto out; 2948 } 2949 2950 if (optind != argc - 1) { 2951 error_report("Expecting one image file name"); 2952 ret = -1; 2953 goto out; 2954 } 2955 2956 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2957 ret = bdrv_parse_cache_flags(cache, &flags); 2958 if (ret < 0) { 2959 error_report("Invalid cache option: %s", cache); 2960 goto out; 2961 } 2962 2963 blk = img_open("image", filename, fmt, flags, true, quiet); 2964 if (!blk) { 2965 error_report("Could not open image '%s'", filename); 2966 ret = -1; 2967 goto out; 2968 } 2969 bs = blk_bs(blk); 2970 2971 fmt = bs->drv->format_name; 2972 2973 if (has_help_option(options)) { 2974 /* If the format was auto-detected, print option help here */ 2975 ret = print_block_option_help(filename, fmt); 2976 goto out; 2977 } 2978 2979 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 2980 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 2981 if (options && qemu_opts_do_parse(opts, options, NULL)) { 2982 error_report("Invalid options for file format '%s'", fmt); 2983 ret = -1; 2984 goto out; 2985 } 2986 2987 /* In case the driver does not call amend_status_cb() */ 2988 qemu_progress_print(0.f, 0); 2989 ret = bdrv_amend_options(bs, opts, &amend_status_cb); 2990 qemu_progress_print(100.f, 0); 2991 if (ret < 0) { 2992 error_report("Error while amending options: %s", strerror(-ret)); 2993 goto out; 2994 } 2995 2996 out: 2997 qemu_progress_end(); 2998 2999 blk_unref(blk); 3000 qemu_opts_del(opts); 3001 qemu_opts_free(create_opts); 3002 g_free(options); 3003 3004 if (ret) { 3005 return 1; 3006 } 3007 return 0; 3008 } 3009 3010 static const img_cmd_t img_cmds[] = { 3011 #define DEF(option, callback, arg_string) \ 3012 { option, callback }, 3013 #include "qemu-img-cmds.h" 3014 #undef DEF 3015 #undef GEN_DOCS 3016 { NULL, NULL, }, 3017 }; 3018 3019 int main(int argc, char **argv) 3020 { 3021 const img_cmd_t *cmd; 3022 const char *cmdname; 3023 Error *local_error = NULL; 3024 int c; 3025 static const struct option long_options[] = { 3026 {"help", no_argument, 0, 'h'}, 3027 {"version", no_argument, 0, 'v'}, 3028 {0, 0, 0, 0} 3029 }; 3030 3031 #ifdef CONFIG_POSIX 3032 signal(SIGPIPE, SIG_IGN); 3033 #endif 3034 3035 error_set_progname(argv[0]); 3036 qemu_init_exec_dir(argv[0]); 3037 3038 if (qemu_init_main_loop(&local_error)) { 3039 error_report("%s", error_get_pretty(local_error)); 3040 error_free(local_error); 3041 exit(EXIT_FAILURE); 3042 } 3043 3044 bdrv_init(); 3045 if (argc < 2) { 3046 error_exit("Not enough arguments"); 3047 } 3048 cmdname = argv[1]; 3049 3050 /* find the command */ 3051 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3052 if (!strcmp(cmdname, cmd->name)) { 3053 return cmd->handler(argc - 1, argv + 1); 3054 } 3055 } 3056 3057 c = getopt_long(argc, argv, "h", long_options, NULL); 3058 3059 if (c == 'h') { 3060 help(); 3061 } 3062 if (c == 'v') { 3063 printf(QEMU_IMG_VERSION); 3064 return 0; 3065 } 3066 3067 /* not found */ 3068 error_exit("Command not found: %s", cmdname); 3069 } 3070