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