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; 264 265 /* 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 if (!drv->create_opts) { 1535 error_report("Format driver '%s' does not support image creation", 1536 drv->format_name); 1537 ret = -1; 1538 goto out; 1539 } 1540 1541 if (!proto_drv->create_opts) { 1542 error_report("Protocol driver '%s' does not support image creation", 1543 proto_drv->format_name); 1544 ret = -1; 1545 goto out; 1546 } 1547 1548 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1549 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1550 1551 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1552 if (options && qemu_opts_do_parse(opts, options, NULL)) { 1553 error_report("Invalid options for file format '%s'", out_fmt); 1554 ret = -1; 1555 goto out; 1556 } 1557 1558 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512); 1559 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1560 if (ret < 0) { 1561 goto out; 1562 } 1563 1564 /* Get backing file name if -o backing_file was used */ 1565 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1566 if (out_baseimg_param) { 1567 out_baseimg = out_baseimg_param; 1568 } 1569 1570 /* Check if compression is supported */ 1571 if (compress) { 1572 bool encryption = 1573 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1574 const char *preallocation = 1575 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1576 1577 if (!drv->bdrv_write_compressed) { 1578 error_report("Compression not supported for this file format"); 1579 ret = -1; 1580 goto out; 1581 } 1582 1583 if (encryption) { 1584 error_report("Compression and encryption not supported at " 1585 "the same time"); 1586 ret = -1; 1587 goto out; 1588 } 1589 1590 if (preallocation 1591 && strcmp(preallocation, "off")) 1592 { 1593 error_report("Compression and preallocation not supported at " 1594 "the same time"); 1595 ret = -1; 1596 goto out; 1597 } 1598 } 1599 1600 if (!skip_create) { 1601 /* Create the new image */ 1602 ret = bdrv_create(drv, out_filename, opts, &local_err); 1603 if (ret < 0) { 1604 error_report("%s: error while converting %s: %s", 1605 out_filename, out_fmt, error_get_pretty(local_err)); 1606 error_free(local_err); 1607 goto out; 1608 } 1609 } 1610 1611 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1612 ret = bdrv_parse_cache_flags(cache, &flags); 1613 if (ret < 0) { 1614 error_report("Invalid cache option: %s", cache); 1615 goto out; 1616 } 1617 1618 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1619 if (!out_blk) { 1620 ret = -1; 1621 goto out; 1622 } 1623 out_bs = blk_bs(out_blk); 1624 1625 bs_i = 0; 1626 bs_offset = 0; 1627 1628 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1629 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1630 * as maximum. */ 1631 bufsectors = MIN(32768, 1632 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1633 out_bs->bl.discard_alignment)) 1634 ); 1635 1636 buf = qemu_blockalign(out_bs, bufsectors * BDRV_SECTOR_SIZE); 1637 1638 if (skip_create) { 1639 int64_t output_sectors = bdrv_nb_sectors(out_bs); 1640 if (output_sectors < 0) { 1641 error_report("unable to get output image length: %s\n", 1642 strerror(-output_sectors)); 1643 ret = -1; 1644 goto out; 1645 } else if (output_sectors < total_sectors) { 1646 error_report("output file is smaller than input file"); 1647 ret = -1; 1648 goto out; 1649 } 1650 } 1651 1652 cluster_sectors = 0; 1653 ret = bdrv_get_info(out_bs, &bdi); 1654 if (ret < 0) { 1655 if (compress) { 1656 error_report("could not get block driver info"); 1657 goto out; 1658 } 1659 } else { 1660 compress = compress || bdi.needs_compressed_writes; 1661 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1662 } 1663 1664 if (compress) { 1665 if (cluster_sectors <= 0 || cluster_sectors > bufsectors) { 1666 error_report("invalid cluster size"); 1667 ret = -1; 1668 goto out; 1669 } 1670 sector_num = 0; 1671 1672 nb_sectors = total_sectors; 1673 1674 for(;;) { 1675 int64_t bs_num; 1676 int remainder; 1677 uint8_t *buf2; 1678 1679 nb_sectors = total_sectors - sector_num; 1680 if (nb_sectors <= 0) 1681 break; 1682 if (nb_sectors >= cluster_sectors) 1683 n = cluster_sectors; 1684 else 1685 n = nb_sectors; 1686 1687 bs_num = sector_num - bs_offset; 1688 assert (bs_num >= 0); 1689 remainder = n; 1690 buf2 = buf; 1691 while (remainder > 0) { 1692 int nlow; 1693 while (bs_num == bs_sectors[bs_i]) { 1694 bs_offset += bs_sectors[bs_i]; 1695 bs_i++; 1696 assert (bs_i < bs_n); 1697 bs_num = 0; 1698 /* printf("changing part: sector_num=%" PRId64 ", " 1699 "bs_i=%d, bs_offset=%" PRId64 ", bs_sectors=%" PRId64 1700 "\n", sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */ 1701 } 1702 assert (bs_num < bs_sectors[bs_i]); 1703 1704 nlow = remainder > bs_sectors[bs_i] - bs_num 1705 ? bs_sectors[bs_i] - bs_num : remainder; 1706 1707 ret = bdrv_read(bs[bs_i], bs_num, buf2, nlow); 1708 if (ret < 0) { 1709 error_report("error while reading sector %" PRId64 ": %s", 1710 bs_num, strerror(-ret)); 1711 goto out; 1712 } 1713 1714 buf2 += nlow * 512; 1715 bs_num += nlow; 1716 1717 remainder -= nlow; 1718 } 1719 assert (remainder == 0); 1720 1721 if (!buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) { 1722 ret = bdrv_write_compressed(out_bs, sector_num, buf, n); 1723 if (ret != 0) { 1724 error_report("error while compressing sector %" PRId64 1725 ": %s", sector_num, strerror(-ret)); 1726 goto out; 1727 } 1728 } 1729 sector_num += n; 1730 qemu_progress_print(100.0 * sector_num / total_sectors, 0); 1731 } 1732 /* signal EOF to align */ 1733 bdrv_write_compressed(out_bs, 0, NULL, 0); 1734 } else { 1735 int64_t sectors_to_read, sectors_read, sector_num_next_status; 1736 bool count_allocated_sectors; 1737 int has_zero_init = min_sparse ? bdrv_has_zero_init(out_bs) : 0; 1738 1739 if (!has_zero_init && bdrv_can_write_zeroes_with_unmap(out_bs)) { 1740 ret = bdrv_make_zero(out_bs, BDRV_REQ_MAY_UNMAP); 1741 if (ret < 0) { 1742 goto out; 1743 } 1744 has_zero_init = 1; 1745 } 1746 1747 sectors_to_read = total_sectors; 1748 count_allocated_sectors = progress && (out_baseimg || has_zero_init); 1749 restart: 1750 sector_num = 0; // total number of sectors converted so far 1751 sectors_read = 0; 1752 sector_num_next_status = 0; 1753 1754 for(;;) { 1755 nb_sectors = total_sectors - sector_num; 1756 if (nb_sectors <= 0) { 1757 if (count_allocated_sectors) { 1758 sectors_to_read = sectors_read; 1759 count_allocated_sectors = false; 1760 goto restart; 1761 } 1762 ret = 0; 1763 break; 1764 } 1765 1766 while (sector_num - bs_offset >= bs_sectors[bs_i]) { 1767 bs_offset += bs_sectors[bs_i]; 1768 bs_i ++; 1769 assert (bs_i < bs_n); 1770 /* printf("changing part: sector_num=%" PRId64 ", bs_i=%d, " 1771 "bs_offset=%" PRId64 ", bs_sectors=%" PRId64 "\n", 1772 sector_num, bs_i, bs_offset, bs_sectors[bs_i]); */ 1773 } 1774 1775 if ((out_baseimg || has_zero_init) && 1776 sector_num >= sector_num_next_status) { 1777 n = nb_sectors > INT_MAX ? INT_MAX : nb_sectors; 1778 ret = bdrv_get_block_status(bs[bs_i], sector_num - bs_offset, 1779 n, &n1); 1780 if (ret < 0) { 1781 error_report("error while reading block status of sector %" 1782 PRId64 ": %s", sector_num - bs_offset, 1783 strerror(-ret)); 1784 goto out; 1785 } 1786 /* If the output image is zero initialized, we are not working 1787 * on a shared base and the input is zero we can skip the next 1788 * n1 sectors */ 1789 if (has_zero_init && !out_baseimg && (ret & BDRV_BLOCK_ZERO)) { 1790 sector_num += n1; 1791 continue; 1792 } 1793 /* If the output image is being created as a copy on write 1794 * image, assume that sectors which are unallocated in the 1795 * input image are present in both the output's and input's 1796 * base images (no need to copy them). */ 1797 if (out_baseimg) { 1798 if (!(ret & BDRV_BLOCK_DATA)) { 1799 sector_num += n1; 1800 continue; 1801 } 1802 /* The next 'n1' sectors are allocated in the input image. 1803 * Copy only those as they may be followed by unallocated 1804 * sectors. */ 1805 nb_sectors = n1; 1806 } 1807 /* avoid redundant callouts to get_block_status */ 1808 sector_num_next_status = sector_num + n1; 1809 } 1810 1811 n = MIN(nb_sectors, bufsectors); 1812 1813 /* round down request length to an aligned sector, but 1814 * do not bother doing this on short requests. They happen 1815 * when we found an all-zero area, and the next sector to 1816 * write will not be sector_num + n. */ 1817 if (cluster_sectors > 0 && n >= cluster_sectors) { 1818 int64_t next_aligned_sector = (sector_num + n); 1819 next_aligned_sector -= next_aligned_sector % cluster_sectors; 1820 if (sector_num + n > next_aligned_sector) { 1821 n = next_aligned_sector - sector_num; 1822 } 1823 } 1824 1825 n = MIN(n, bs_sectors[bs_i] - (sector_num - bs_offset)); 1826 1827 sectors_read += n; 1828 if (count_allocated_sectors) { 1829 sector_num += n; 1830 continue; 1831 } 1832 1833 n1 = n; 1834 ret = bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n); 1835 if (ret < 0) { 1836 error_report("error while reading sector %" PRId64 ": %s", 1837 sector_num - bs_offset, strerror(-ret)); 1838 goto out; 1839 } 1840 /* NOTE: at the same time we convert, we do not write zero 1841 sectors to have a chance to compress the image. Ideally, we 1842 should add a specific call to have the info to go faster */ 1843 buf1 = buf; 1844 while (n > 0) { 1845 if (!has_zero_init || 1846 is_allocated_sectors_min(buf1, n, &n1, min_sparse)) { 1847 ret = bdrv_write(out_bs, sector_num, buf1, n1); 1848 if (ret < 0) { 1849 error_report("error while writing sector %" PRId64 1850 ": %s", sector_num, strerror(-ret)); 1851 goto out; 1852 } 1853 } 1854 sector_num += n1; 1855 n -= n1; 1856 buf1 += n1 * 512; 1857 } 1858 qemu_progress_print(100.0 * sectors_read / sectors_to_read, 0); 1859 } 1860 } 1861 out: 1862 if (!ret) { 1863 qemu_progress_print(100, 0); 1864 } 1865 qemu_progress_end(); 1866 qemu_opts_del(opts); 1867 qemu_opts_free(create_opts); 1868 qemu_vfree(buf); 1869 qemu_opts_del(sn_opts); 1870 blk_unref(out_blk); 1871 g_free(bs); 1872 if (blk) { 1873 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1874 blk_unref(blk[bs_i]); 1875 } 1876 g_free(blk); 1877 } 1878 g_free(bs_sectors); 1879 fail_getopt: 1880 g_free(options); 1881 1882 if (ret) { 1883 return 1; 1884 } 1885 return 0; 1886 } 1887 1888 1889 static void dump_snapshots(BlockDriverState *bs) 1890 { 1891 QEMUSnapshotInfo *sn_tab, *sn; 1892 int nb_sns, i; 1893 1894 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1895 if (nb_sns <= 0) 1896 return; 1897 printf("Snapshot list:\n"); 1898 bdrv_snapshot_dump(fprintf, stdout, NULL); 1899 printf("\n"); 1900 for(i = 0; i < nb_sns; i++) { 1901 sn = &sn_tab[i]; 1902 bdrv_snapshot_dump(fprintf, stdout, sn); 1903 printf("\n"); 1904 } 1905 g_free(sn_tab); 1906 } 1907 1908 static void dump_json_image_info_list(ImageInfoList *list) 1909 { 1910 Error *local_err = NULL; 1911 QString *str; 1912 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1913 QObject *obj; 1914 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1915 &list, NULL, &local_err); 1916 obj = qmp_output_get_qobject(ov); 1917 str = qobject_to_json_pretty(obj); 1918 assert(str != NULL); 1919 printf("%s\n", qstring_get_str(str)); 1920 qobject_decref(obj); 1921 qmp_output_visitor_cleanup(ov); 1922 QDECREF(str); 1923 } 1924 1925 static void dump_json_image_info(ImageInfo *info) 1926 { 1927 Error *local_err = NULL; 1928 QString *str; 1929 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1930 QObject *obj; 1931 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1932 &info, NULL, &local_err); 1933 obj = qmp_output_get_qobject(ov); 1934 str = qobject_to_json_pretty(obj); 1935 assert(str != NULL); 1936 printf("%s\n", qstring_get_str(str)); 1937 qobject_decref(obj); 1938 qmp_output_visitor_cleanup(ov); 1939 QDECREF(str); 1940 } 1941 1942 static void dump_human_image_info_list(ImageInfoList *list) 1943 { 1944 ImageInfoList *elem; 1945 bool delim = false; 1946 1947 for (elem = list; elem; elem = elem->next) { 1948 if (delim) { 1949 printf("\n"); 1950 } 1951 delim = true; 1952 1953 bdrv_image_info_dump(fprintf, stdout, elem->value); 1954 } 1955 } 1956 1957 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1958 { 1959 return strcmp(a, b) == 0; 1960 } 1961 1962 /** 1963 * Open an image file chain and return an ImageInfoList 1964 * 1965 * @filename: topmost image filename 1966 * @fmt: topmost image format (may be NULL to autodetect) 1967 * @chain: true - enumerate entire backing file chain 1968 * false - only topmost image file 1969 * 1970 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1971 * image file. If there was an error a message will have been printed to 1972 * stderr. 1973 */ 1974 static ImageInfoList *collect_image_info_list(const char *filename, 1975 const char *fmt, 1976 bool chain) 1977 { 1978 ImageInfoList *head = NULL; 1979 ImageInfoList **last = &head; 1980 GHashTable *filenames; 1981 Error *err = NULL; 1982 1983 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 1984 1985 while (filename) { 1986 BlockBackend *blk; 1987 BlockDriverState *bs; 1988 ImageInfo *info; 1989 ImageInfoList *elem; 1990 1991 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 1992 error_report("Backing file '%s' creates an infinite loop.", 1993 filename); 1994 goto err; 1995 } 1996 g_hash_table_insert(filenames, (gpointer)filename, NULL); 1997 1998 blk = img_open("image", filename, fmt, 1999 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2000 if (!blk) { 2001 goto err; 2002 } 2003 bs = blk_bs(blk); 2004 2005 bdrv_query_image_info(bs, &info, &err); 2006 if (err) { 2007 error_report("%s", error_get_pretty(err)); 2008 error_free(err); 2009 blk_unref(blk); 2010 goto err; 2011 } 2012 2013 elem = g_new0(ImageInfoList, 1); 2014 elem->value = info; 2015 *last = elem; 2016 last = &elem->next; 2017 2018 blk_unref(blk); 2019 2020 filename = fmt = NULL; 2021 if (chain) { 2022 if (info->has_full_backing_filename) { 2023 filename = info->full_backing_filename; 2024 } else if (info->has_backing_filename) { 2025 filename = info->backing_filename; 2026 } 2027 if (info->has_backing_filename_format) { 2028 fmt = info->backing_filename_format; 2029 } 2030 } 2031 } 2032 g_hash_table_destroy(filenames); 2033 return head; 2034 2035 err: 2036 qapi_free_ImageInfoList(head); 2037 g_hash_table_destroy(filenames); 2038 return NULL; 2039 } 2040 2041 static int img_info(int argc, char **argv) 2042 { 2043 int c; 2044 OutputFormat output_format = OFORMAT_HUMAN; 2045 bool chain = false; 2046 const char *filename, *fmt, *output; 2047 ImageInfoList *list; 2048 2049 fmt = NULL; 2050 output = NULL; 2051 for(;;) { 2052 int option_index = 0; 2053 static const struct option long_options[] = { 2054 {"help", no_argument, 0, 'h'}, 2055 {"format", required_argument, 0, 'f'}, 2056 {"output", required_argument, 0, OPTION_OUTPUT}, 2057 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2058 {0, 0, 0, 0} 2059 }; 2060 c = getopt_long(argc, argv, "f:h", 2061 long_options, &option_index); 2062 if (c == -1) { 2063 break; 2064 } 2065 switch(c) { 2066 case '?': 2067 case 'h': 2068 help(); 2069 break; 2070 case 'f': 2071 fmt = optarg; 2072 break; 2073 case OPTION_OUTPUT: 2074 output = optarg; 2075 break; 2076 case OPTION_BACKING_CHAIN: 2077 chain = true; 2078 break; 2079 } 2080 } 2081 if (optind != argc - 1) { 2082 error_exit("Expecting one image file name"); 2083 } 2084 filename = argv[optind++]; 2085 2086 if (output && !strcmp(output, "json")) { 2087 output_format = OFORMAT_JSON; 2088 } else if (output && !strcmp(output, "human")) { 2089 output_format = OFORMAT_HUMAN; 2090 } else if (output) { 2091 error_report("--output must be used with human or json as argument."); 2092 return 1; 2093 } 2094 2095 list = collect_image_info_list(filename, fmt, chain); 2096 if (!list) { 2097 return 1; 2098 } 2099 2100 switch (output_format) { 2101 case OFORMAT_HUMAN: 2102 dump_human_image_info_list(list); 2103 break; 2104 case OFORMAT_JSON: 2105 if (chain) { 2106 dump_json_image_info_list(list); 2107 } else { 2108 dump_json_image_info(list->value); 2109 } 2110 break; 2111 } 2112 2113 qapi_free_ImageInfoList(list); 2114 return 0; 2115 } 2116 2117 2118 typedef struct MapEntry { 2119 int flags; 2120 int depth; 2121 int64_t start; 2122 int64_t length; 2123 int64_t offset; 2124 BlockDriverState *bs; 2125 } MapEntry; 2126 2127 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2128 MapEntry *next) 2129 { 2130 switch (output_format) { 2131 case OFORMAT_HUMAN: 2132 if ((e->flags & BDRV_BLOCK_DATA) && 2133 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2134 error_report("File contains external, encrypted or compressed clusters."); 2135 exit(1); 2136 } 2137 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2138 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2139 e->start, e->length, e->offset, e->bs->filename); 2140 } 2141 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2142 * Modify the flags here to allow more coalescing. 2143 */ 2144 if (next && 2145 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2146 next->flags &= ~BDRV_BLOCK_DATA; 2147 next->flags |= BDRV_BLOCK_ZERO; 2148 } 2149 break; 2150 case OFORMAT_JSON: 2151 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2152 " \"zero\": %s, \"data\": %s", 2153 (e->start == 0 ? "[" : ",\n"), 2154 e->start, e->length, e->depth, 2155 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2156 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2157 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2158 printf(", \"offset\": %"PRId64"", e->offset); 2159 } 2160 putchar('}'); 2161 2162 if (!next) { 2163 printf("]\n"); 2164 } 2165 break; 2166 } 2167 } 2168 2169 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2170 int nb_sectors, MapEntry *e) 2171 { 2172 int64_t ret; 2173 int depth; 2174 2175 /* As an optimization, we could cache the current range of unallocated 2176 * clusters in each file of the chain, and avoid querying the same 2177 * range repeatedly. 2178 */ 2179 2180 depth = 0; 2181 for (;;) { 2182 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2183 if (ret < 0) { 2184 return ret; 2185 } 2186 assert(nb_sectors); 2187 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2188 break; 2189 } 2190 bs = bs->backing_hd; 2191 if (bs == NULL) { 2192 ret = 0; 2193 break; 2194 } 2195 2196 depth++; 2197 } 2198 2199 e->start = sector_num * BDRV_SECTOR_SIZE; 2200 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2201 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2202 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2203 e->depth = depth; 2204 e->bs = bs; 2205 return 0; 2206 } 2207 2208 static int img_map(int argc, char **argv) 2209 { 2210 int c; 2211 OutputFormat output_format = OFORMAT_HUMAN; 2212 BlockBackend *blk; 2213 BlockDriverState *bs; 2214 const char *filename, *fmt, *output; 2215 int64_t length; 2216 MapEntry curr = { .length = 0 }, next; 2217 int ret = 0; 2218 2219 fmt = NULL; 2220 output = NULL; 2221 for (;;) { 2222 int option_index = 0; 2223 static const struct option long_options[] = { 2224 {"help", no_argument, 0, 'h'}, 2225 {"format", required_argument, 0, 'f'}, 2226 {"output", required_argument, 0, OPTION_OUTPUT}, 2227 {0, 0, 0, 0} 2228 }; 2229 c = getopt_long(argc, argv, "f:h", 2230 long_options, &option_index); 2231 if (c == -1) { 2232 break; 2233 } 2234 switch (c) { 2235 case '?': 2236 case 'h': 2237 help(); 2238 break; 2239 case 'f': 2240 fmt = optarg; 2241 break; 2242 case OPTION_OUTPUT: 2243 output = optarg; 2244 break; 2245 } 2246 } 2247 if (optind != argc - 1) { 2248 error_exit("Expecting one image file name"); 2249 } 2250 filename = argv[optind]; 2251 2252 if (output && !strcmp(output, "json")) { 2253 output_format = OFORMAT_JSON; 2254 } else if (output && !strcmp(output, "human")) { 2255 output_format = OFORMAT_HUMAN; 2256 } else if (output) { 2257 error_report("--output must be used with human or json as argument."); 2258 return 1; 2259 } 2260 2261 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2262 if (!blk) { 2263 return 1; 2264 } 2265 bs = blk_bs(blk); 2266 2267 if (output_format == OFORMAT_HUMAN) { 2268 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2269 } 2270 2271 length = bdrv_getlength(bs); 2272 while (curr.start + curr.length < length) { 2273 int64_t nsectors_left; 2274 int64_t sector_num; 2275 int n; 2276 2277 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2278 2279 /* Probe up to 1 GiB at a time. */ 2280 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2281 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2282 ret = get_block_status(bs, sector_num, n, &next); 2283 2284 if (ret < 0) { 2285 error_report("Could not read file metadata: %s", strerror(-ret)); 2286 goto out; 2287 } 2288 2289 if (curr.length != 0 && curr.flags == next.flags && 2290 curr.depth == next.depth && 2291 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2292 curr.offset + curr.length == next.offset)) { 2293 curr.length += next.length; 2294 continue; 2295 } 2296 2297 if (curr.length > 0) { 2298 dump_map_entry(output_format, &curr, &next); 2299 } 2300 curr = next; 2301 } 2302 2303 dump_map_entry(output_format, &curr, NULL); 2304 2305 out: 2306 blk_unref(blk); 2307 return ret < 0; 2308 } 2309 2310 #define SNAPSHOT_LIST 1 2311 #define SNAPSHOT_CREATE 2 2312 #define SNAPSHOT_APPLY 3 2313 #define SNAPSHOT_DELETE 4 2314 2315 static int img_snapshot(int argc, char **argv) 2316 { 2317 BlockBackend *blk; 2318 BlockDriverState *bs; 2319 QEMUSnapshotInfo sn; 2320 char *filename, *snapshot_name = NULL; 2321 int c, ret = 0, bdrv_oflags; 2322 int action = 0; 2323 qemu_timeval tv; 2324 bool quiet = false; 2325 Error *err = NULL; 2326 2327 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2328 /* Parse commandline parameters */ 2329 for(;;) { 2330 c = getopt(argc, argv, "la:c:d:hq"); 2331 if (c == -1) { 2332 break; 2333 } 2334 switch(c) { 2335 case '?': 2336 case 'h': 2337 help(); 2338 return 0; 2339 case 'l': 2340 if (action) { 2341 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2342 return 0; 2343 } 2344 action = SNAPSHOT_LIST; 2345 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2346 break; 2347 case 'a': 2348 if (action) { 2349 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2350 return 0; 2351 } 2352 action = SNAPSHOT_APPLY; 2353 snapshot_name = optarg; 2354 break; 2355 case 'c': 2356 if (action) { 2357 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2358 return 0; 2359 } 2360 action = SNAPSHOT_CREATE; 2361 snapshot_name = optarg; 2362 break; 2363 case 'd': 2364 if (action) { 2365 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2366 return 0; 2367 } 2368 action = SNAPSHOT_DELETE; 2369 snapshot_name = optarg; 2370 break; 2371 case 'q': 2372 quiet = true; 2373 break; 2374 } 2375 } 2376 2377 if (optind != argc - 1) { 2378 error_exit("Expecting one image file name"); 2379 } 2380 filename = argv[optind++]; 2381 2382 /* Open the image */ 2383 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2384 if (!blk) { 2385 return 1; 2386 } 2387 bs = blk_bs(blk); 2388 2389 /* Perform the requested action */ 2390 switch(action) { 2391 case SNAPSHOT_LIST: 2392 dump_snapshots(bs); 2393 break; 2394 2395 case SNAPSHOT_CREATE: 2396 memset(&sn, 0, sizeof(sn)); 2397 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2398 2399 qemu_gettimeofday(&tv); 2400 sn.date_sec = tv.tv_sec; 2401 sn.date_nsec = tv.tv_usec * 1000; 2402 2403 ret = bdrv_snapshot_create(bs, &sn); 2404 if (ret) { 2405 error_report("Could not create snapshot '%s': %d (%s)", 2406 snapshot_name, ret, strerror(-ret)); 2407 } 2408 break; 2409 2410 case SNAPSHOT_APPLY: 2411 ret = bdrv_snapshot_goto(bs, snapshot_name); 2412 if (ret) { 2413 error_report("Could not apply snapshot '%s': %d (%s)", 2414 snapshot_name, ret, strerror(-ret)); 2415 } 2416 break; 2417 2418 case SNAPSHOT_DELETE: 2419 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2420 if (err) { 2421 error_report("Could not delete snapshot '%s': (%s)", 2422 snapshot_name, error_get_pretty(err)); 2423 error_free(err); 2424 ret = 1; 2425 } 2426 break; 2427 } 2428 2429 /* Cleanup */ 2430 blk_unref(blk); 2431 if (ret) { 2432 return 1; 2433 } 2434 return 0; 2435 } 2436 2437 static int img_rebase(int argc, char **argv) 2438 { 2439 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2440 BlockDriverState *bs = NULL, *bs_old_backing = NULL, *bs_new_backing = NULL; 2441 BlockDriver *old_backing_drv, *new_backing_drv; 2442 char *filename; 2443 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2444 int c, flags, src_flags, ret; 2445 int unsafe = 0; 2446 int progress = 0; 2447 bool quiet = false; 2448 Error *local_err = NULL; 2449 2450 /* Parse commandline parameters */ 2451 fmt = NULL; 2452 cache = BDRV_DEFAULT_CACHE; 2453 src_cache = BDRV_DEFAULT_CACHE; 2454 out_baseimg = NULL; 2455 out_basefmt = NULL; 2456 for(;;) { 2457 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2458 if (c == -1) { 2459 break; 2460 } 2461 switch(c) { 2462 case '?': 2463 case 'h': 2464 help(); 2465 return 0; 2466 case 'f': 2467 fmt = optarg; 2468 break; 2469 case 'F': 2470 out_basefmt = optarg; 2471 break; 2472 case 'b': 2473 out_baseimg = optarg; 2474 break; 2475 case 'u': 2476 unsafe = 1; 2477 break; 2478 case 'p': 2479 progress = 1; 2480 break; 2481 case 't': 2482 cache = optarg; 2483 break; 2484 case 'T': 2485 src_cache = optarg; 2486 break; 2487 case 'q': 2488 quiet = true; 2489 break; 2490 } 2491 } 2492 2493 if (quiet) { 2494 progress = 0; 2495 } 2496 2497 if (optind != argc - 1) { 2498 error_exit("Expecting one image file name"); 2499 } 2500 if (!unsafe && !out_baseimg) { 2501 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2502 } 2503 filename = argv[optind++]; 2504 2505 qemu_progress_init(progress, 2.0); 2506 qemu_progress_print(0, 100); 2507 2508 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2509 ret = bdrv_parse_cache_flags(cache, &flags); 2510 if (ret < 0) { 2511 error_report("Invalid cache option: %s", cache); 2512 goto out; 2513 } 2514 2515 src_flags = BDRV_O_FLAGS; 2516 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2517 if (ret < 0) { 2518 error_report("Invalid source cache option: %s", src_cache); 2519 goto out; 2520 } 2521 2522 /* 2523 * Open the images. 2524 * 2525 * Ignore the old backing file for unsafe rebase in case we want to correct 2526 * the reference to a renamed or moved backing file. 2527 */ 2528 blk = img_open("image", filename, fmt, flags, true, quiet); 2529 if (!blk) { 2530 ret = -1; 2531 goto out; 2532 } 2533 bs = blk_bs(blk); 2534 2535 /* Find the right drivers for the backing files */ 2536 old_backing_drv = NULL; 2537 new_backing_drv = NULL; 2538 2539 if (!unsafe && bs->backing_format[0] != '\0') { 2540 old_backing_drv = bdrv_find_format(bs->backing_format); 2541 if (old_backing_drv == NULL) { 2542 error_report("Invalid format name: '%s'", bs->backing_format); 2543 ret = -1; 2544 goto out; 2545 } 2546 } 2547 2548 if (out_basefmt != NULL) { 2549 new_backing_drv = bdrv_find_format(out_basefmt); 2550 if (new_backing_drv == NULL) { 2551 error_report("Invalid format name: '%s'", out_basefmt); 2552 ret = -1; 2553 goto out; 2554 } 2555 } 2556 2557 /* For safe rebasing we need to compare old and new backing file */ 2558 if (!unsafe) { 2559 char backing_name[PATH_MAX]; 2560 2561 blk_old_backing = blk_new_with_bs("old_backing", &error_abort); 2562 bs_old_backing = blk_bs(blk_old_backing); 2563 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2564 ret = bdrv_open(&bs_old_backing, backing_name, NULL, NULL, src_flags, 2565 old_backing_drv, &local_err); 2566 if (ret) { 2567 error_report("Could not open old backing file '%s': %s", 2568 backing_name, error_get_pretty(local_err)); 2569 error_free(local_err); 2570 goto out; 2571 } 2572 if (out_baseimg[0]) { 2573 blk_new_backing = blk_new_with_bs("new_backing", &error_abort); 2574 bs_new_backing = blk_bs(blk_new_backing); 2575 ret = bdrv_open(&bs_new_backing, out_baseimg, NULL, NULL, src_flags, 2576 new_backing_drv, &local_err); 2577 if (ret) { 2578 error_report("Could not open new backing file '%s': %s", 2579 out_baseimg, error_get_pretty(local_err)); 2580 error_free(local_err); 2581 goto out; 2582 } 2583 } 2584 } 2585 2586 /* 2587 * Check each unallocated cluster in the COW file. If it is unallocated, 2588 * accesses go to the backing file. We must therefore compare this cluster 2589 * in the old and new backing file, and if they differ we need to copy it 2590 * from the old backing file into the COW file. 2591 * 2592 * If qemu-img crashes during this step, no harm is done. The content of 2593 * the image is the same as the original one at any time. 2594 */ 2595 if (!unsafe) { 2596 int64_t num_sectors; 2597 int64_t old_backing_num_sectors; 2598 int64_t new_backing_num_sectors = 0; 2599 uint64_t sector; 2600 int n; 2601 uint8_t * buf_old; 2602 uint8_t * buf_new; 2603 float local_progress = 0; 2604 2605 buf_old = qemu_blockalign(bs, IO_BUF_SIZE); 2606 buf_new = qemu_blockalign(bs, IO_BUF_SIZE); 2607 2608 num_sectors = bdrv_nb_sectors(bs); 2609 if (num_sectors < 0) { 2610 error_report("Could not get size of '%s': %s", 2611 filename, strerror(-num_sectors)); 2612 ret = -1; 2613 goto out; 2614 } 2615 old_backing_num_sectors = bdrv_nb_sectors(bs_old_backing); 2616 if (old_backing_num_sectors < 0) { 2617 char backing_name[PATH_MAX]; 2618 2619 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2620 error_report("Could not get size of '%s': %s", 2621 backing_name, strerror(-old_backing_num_sectors)); 2622 ret = -1; 2623 goto out; 2624 } 2625 if (bs_new_backing) { 2626 new_backing_num_sectors = bdrv_nb_sectors(bs_new_backing); 2627 if (new_backing_num_sectors < 0) { 2628 error_report("Could not get size of '%s': %s", 2629 out_baseimg, strerror(-new_backing_num_sectors)); 2630 ret = -1; 2631 goto out; 2632 } 2633 } 2634 2635 if (num_sectors != 0) { 2636 local_progress = (float)100 / 2637 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2638 } 2639 2640 for (sector = 0; sector < num_sectors; sector += n) { 2641 2642 /* How many sectors can we handle with the next read? */ 2643 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2644 n = (IO_BUF_SIZE / 512); 2645 } else { 2646 n = num_sectors - sector; 2647 } 2648 2649 /* If the cluster is allocated, we don't need to take action */ 2650 ret = bdrv_is_allocated(bs, sector, n, &n); 2651 if (ret < 0) { 2652 error_report("error while reading image metadata: %s", 2653 strerror(-ret)); 2654 goto out; 2655 } 2656 if (ret) { 2657 continue; 2658 } 2659 2660 /* 2661 * Read old and new backing file and take into consideration that 2662 * backing files may be smaller than the COW image. 2663 */ 2664 if (sector >= old_backing_num_sectors) { 2665 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2666 } else { 2667 if (sector + n > old_backing_num_sectors) { 2668 n = old_backing_num_sectors - sector; 2669 } 2670 2671 ret = bdrv_read(bs_old_backing, sector, buf_old, n); 2672 if (ret < 0) { 2673 error_report("error while reading from old backing file"); 2674 goto out; 2675 } 2676 } 2677 2678 if (sector >= new_backing_num_sectors || !bs_new_backing) { 2679 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2680 } else { 2681 if (sector + n > new_backing_num_sectors) { 2682 n = new_backing_num_sectors - sector; 2683 } 2684 2685 ret = bdrv_read(bs_new_backing, sector, buf_new, n); 2686 if (ret < 0) { 2687 error_report("error while reading from new backing file"); 2688 goto out; 2689 } 2690 } 2691 2692 /* If they differ, we need to write to the COW file */ 2693 uint64_t written = 0; 2694 2695 while (written < n) { 2696 int pnum; 2697 2698 if (compare_sectors(buf_old + written * 512, 2699 buf_new + written * 512, n - written, &pnum)) 2700 { 2701 ret = bdrv_write(bs, sector + written, 2702 buf_old + written * 512, pnum); 2703 if (ret < 0) { 2704 error_report("Error while writing to COW image: %s", 2705 strerror(-ret)); 2706 goto out; 2707 } 2708 } 2709 2710 written += pnum; 2711 } 2712 qemu_progress_print(local_progress, 100); 2713 } 2714 2715 qemu_vfree(buf_old); 2716 qemu_vfree(buf_new); 2717 } 2718 2719 /* 2720 * Change the backing file. All clusters that are different from the old 2721 * backing file are overwritten in the COW file now, so the visible content 2722 * doesn't change when we switch the backing file. 2723 */ 2724 if (out_baseimg && *out_baseimg) { 2725 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2726 } else { 2727 ret = bdrv_change_backing_file(bs, NULL, NULL); 2728 } 2729 2730 if (ret == -ENOSPC) { 2731 error_report("Could not change the backing file to '%s': No " 2732 "space left in the file header", out_baseimg); 2733 } else if (ret < 0) { 2734 error_report("Could not change the backing file to '%s': %s", 2735 out_baseimg, strerror(-ret)); 2736 } 2737 2738 qemu_progress_print(100, 0); 2739 /* 2740 * TODO At this point it is possible to check if any clusters that are 2741 * allocated in the COW file are the same in the backing file. If so, they 2742 * could be dropped from the COW file. Don't do this before switching the 2743 * backing file, in case of a crash this would lead to corruption. 2744 */ 2745 out: 2746 qemu_progress_end(); 2747 /* Cleanup */ 2748 if (!unsafe) { 2749 blk_unref(blk_old_backing); 2750 blk_unref(blk_new_backing); 2751 } 2752 2753 blk_unref(blk); 2754 if (ret) { 2755 return 1; 2756 } 2757 return 0; 2758 } 2759 2760 static int img_resize(int argc, char **argv) 2761 { 2762 int c, ret, relative; 2763 const char *filename, *fmt, *size; 2764 int64_t n, total_size; 2765 bool quiet = false; 2766 BlockBackend *blk = NULL; 2767 BlockDriverState *bs = NULL; 2768 QemuOpts *param; 2769 static QemuOptsList resize_options = { 2770 .name = "resize_options", 2771 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2772 .desc = { 2773 { 2774 .name = BLOCK_OPT_SIZE, 2775 .type = QEMU_OPT_SIZE, 2776 .help = "Virtual disk size" 2777 }, { 2778 /* end of list */ 2779 } 2780 }, 2781 }; 2782 2783 /* Remove size from argv manually so that negative numbers are not treated 2784 * as options by getopt. */ 2785 if (argc < 3) { 2786 error_exit("Not enough arguments"); 2787 return 1; 2788 } 2789 2790 size = argv[--argc]; 2791 2792 /* Parse getopt arguments */ 2793 fmt = NULL; 2794 for(;;) { 2795 c = getopt(argc, argv, "f:hq"); 2796 if (c == -1) { 2797 break; 2798 } 2799 switch(c) { 2800 case '?': 2801 case 'h': 2802 help(); 2803 break; 2804 case 'f': 2805 fmt = optarg; 2806 break; 2807 case 'q': 2808 quiet = true; 2809 break; 2810 } 2811 } 2812 if (optind != argc - 1) { 2813 error_exit("Expecting one image file name"); 2814 } 2815 filename = argv[optind++]; 2816 2817 /* Choose grow, shrink, or absolute resize mode */ 2818 switch (size[0]) { 2819 case '+': 2820 relative = 1; 2821 size++; 2822 break; 2823 case '-': 2824 relative = -1; 2825 size++; 2826 break; 2827 default: 2828 relative = 0; 2829 break; 2830 } 2831 2832 /* Parse size */ 2833 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2834 if (qemu_opt_set(param, BLOCK_OPT_SIZE, size)) { 2835 /* Error message already printed when size parsing fails */ 2836 ret = -1; 2837 qemu_opts_del(param); 2838 goto out; 2839 } 2840 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2841 qemu_opts_del(param); 2842 2843 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2844 true, quiet); 2845 if (!blk) { 2846 ret = -1; 2847 goto out; 2848 } 2849 bs = blk_bs(blk); 2850 2851 if (relative) { 2852 total_size = bdrv_getlength(bs) + n * relative; 2853 } else { 2854 total_size = n; 2855 } 2856 if (total_size <= 0) { 2857 error_report("New image size must be positive"); 2858 ret = -1; 2859 goto out; 2860 } 2861 2862 ret = bdrv_truncate(bs, total_size); 2863 switch (ret) { 2864 case 0: 2865 qprintf(quiet, "Image resized.\n"); 2866 break; 2867 case -ENOTSUP: 2868 error_report("This image does not support resize"); 2869 break; 2870 case -EACCES: 2871 error_report("Image is read-only"); 2872 break; 2873 default: 2874 error_report("Error resizing image (%d)", -ret); 2875 break; 2876 } 2877 out: 2878 blk_unref(blk); 2879 if (ret) { 2880 return 1; 2881 } 2882 return 0; 2883 } 2884 2885 static void amend_status_cb(BlockDriverState *bs, 2886 int64_t offset, int64_t total_work_size) 2887 { 2888 qemu_progress_print(100.f * offset / total_work_size, 0); 2889 } 2890 2891 static int img_amend(int argc, char **argv) 2892 { 2893 int c, ret = 0; 2894 char *options = NULL; 2895 QemuOptsList *create_opts = NULL; 2896 QemuOpts *opts = NULL; 2897 const char *fmt = NULL, *filename, *cache; 2898 int flags; 2899 bool quiet = false, progress = false; 2900 BlockBackend *blk = NULL; 2901 BlockDriverState *bs = NULL; 2902 2903 cache = BDRV_DEFAULT_CACHE; 2904 for (;;) { 2905 c = getopt(argc, argv, "ho:f:t:pq"); 2906 if (c == -1) { 2907 break; 2908 } 2909 2910 switch (c) { 2911 case 'h': 2912 case '?': 2913 help(); 2914 break; 2915 case 'o': 2916 if (!is_valid_option_list(optarg)) { 2917 error_report("Invalid option list: %s", optarg); 2918 ret = -1; 2919 goto out; 2920 } 2921 if (!options) { 2922 options = g_strdup(optarg); 2923 } else { 2924 char *old_options = options; 2925 options = g_strdup_printf("%s,%s", options, optarg); 2926 g_free(old_options); 2927 } 2928 break; 2929 case 'f': 2930 fmt = optarg; 2931 break; 2932 case 't': 2933 cache = optarg; 2934 break; 2935 case 'p': 2936 progress = true; 2937 break; 2938 case 'q': 2939 quiet = true; 2940 break; 2941 } 2942 } 2943 2944 if (!options) { 2945 error_exit("Must specify options (-o)"); 2946 } 2947 2948 if (quiet) { 2949 progress = false; 2950 } 2951 qemu_progress_init(progress, 1.0); 2952 2953 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2954 if (fmt && has_help_option(options)) { 2955 /* If a format is explicitly specified (and possibly no filename is 2956 * given), print option help here */ 2957 ret = print_block_option_help(filename, fmt); 2958 goto out; 2959 } 2960 2961 if (optind != argc - 1) { 2962 error_report("Expecting one image file name"); 2963 ret = -1; 2964 goto out; 2965 } 2966 2967 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2968 ret = bdrv_parse_cache_flags(cache, &flags); 2969 if (ret < 0) { 2970 error_report("Invalid cache option: %s", cache); 2971 goto out; 2972 } 2973 2974 blk = img_open("image", filename, fmt, flags, true, quiet); 2975 if (!blk) { 2976 ret = -1; 2977 goto out; 2978 } 2979 bs = blk_bs(blk); 2980 2981 fmt = bs->drv->format_name; 2982 2983 if (has_help_option(options)) { 2984 /* If the format was auto-detected, print option help here */ 2985 ret = print_block_option_help(filename, fmt); 2986 goto out; 2987 } 2988 2989 if (!bs->drv->create_opts) { 2990 error_report("Format driver '%s' does not support any options to amend", 2991 fmt); 2992 ret = -1; 2993 goto out; 2994 } 2995 2996 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 2997 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 2998 if (options && qemu_opts_do_parse(opts, options, NULL)) { 2999 error_report("Invalid options for file format '%s'", fmt); 3000 ret = -1; 3001 goto out; 3002 } 3003 3004 /* In case the driver does not call amend_status_cb() */ 3005 qemu_progress_print(0.f, 0); 3006 ret = bdrv_amend_options(bs, opts, &amend_status_cb); 3007 qemu_progress_print(100.f, 0); 3008 if (ret < 0) { 3009 error_report("Error while amending options: %s", strerror(-ret)); 3010 goto out; 3011 } 3012 3013 out: 3014 qemu_progress_end(); 3015 3016 blk_unref(blk); 3017 qemu_opts_del(opts); 3018 qemu_opts_free(create_opts); 3019 g_free(options); 3020 3021 if (ret) { 3022 return 1; 3023 } 3024 return 0; 3025 } 3026 3027 static const img_cmd_t img_cmds[] = { 3028 #define DEF(option, callback, arg_string) \ 3029 { option, callback }, 3030 #include "qemu-img-cmds.h" 3031 #undef DEF 3032 #undef GEN_DOCS 3033 { NULL, NULL, }, 3034 }; 3035 3036 int main(int argc, char **argv) 3037 { 3038 const img_cmd_t *cmd; 3039 const char *cmdname; 3040 Error *local_error = NULL; 3041 int c; 3042 static const struct option long_options[] = { 3043 {"help", no_argument, 0, 'h'}, 3044 {"version", no_argument, 0, 'v'}, 3045 {0, 0, 0, 0} 3046 }; 3047 3048 #ifdef CONFIG_POSIX 3049 signal(SIGPIPE, SIG_IGN); 3050 #endif 3051 3052 error_set_progname(argv[0]); 3053 qemu_init_exec_dir(argv[0]); 3054 3055 if (qemu_init_main_loop(&local_error)) { 3056 error_report("%s", error_get_pretty(local_error)); 3057 error_free(local_error); 3058 exit(EXIT_FAILURE); 3059 } 3060 3061 bdrv_init(); 3062 if (argc < 2) { 3063 error_exit("Not enough arguments"); 3064 } 3065 cmdname = argv[1]; 3066 3067 /* find the command */ 3068 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3069 if (!strcmp(cmdname, cmd->name)) { 3070 return cmd->handler(argc - 1, argv + 1); 3071 } 3072 } 3073 3074 c = getopt_long(argc, argv, "h", long_options, NULL); 3075 3076 if (c == 'h') { 3077 help(); 3078 } 3079 if (c == 'v') { 3080 printf(QEMU_IMG_VERSION); 3081 return 0; 3082 } 3083 3084 /* not found */ 3085 error_exit("Command not found: %s", cmdname); 3086 } 3087