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