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