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 "qemu/osdep.h" 25 #include "qemu-version.h" 26 #include "qapi/error.h" 27 #include "qapi-visit.h" 28 #include "qapi/qmp-output-visitor.h" 29 #include "qapi/qmp/qerror.h" 30 #include "qapi/qmp/qjson.h" 31 #include "qemu/cutils.h" 32 #include "qemu/config-file.h" 33 #include "qemu/option.h" 34 #include "qemu/error-report.h" 35 #include "qemu/log.h" 36 #include "qom/object_interfaces.h" 37 #include "sysemu/sysemu.h" 38 #include "sysemu/block-backend.h" 39 #include "block/block_int.h" 40 #include "block/blockjob.h" 41 #include "block/qapi.h" 42 #include "crypto/init.h" 43 #include "trace/control.h" 44 #include <getopt.h> 45 46 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 47 ", " QEMU_COPYRIGHT "\n" 48 49 typedef struct img_cmd_t { 50 const char *name; 51 int (*handler)(int argc, char **argv); 52 } img_cmd_t; 53 54 enum { 55 OPTION_OUTPUT = 256, 56 OPTION_BACKING_CHAIN = 257, 57 OPTION_OBJECT = 258, 58 OPTION_IMAGE_OPTS = 259, 59 OPTION_PATTERN = 260, 60 OPTION_FLUSH_INTERVAL = 261, 61 OPTION_NO_DRAIN = 262, 62 }; 63 64 typedef enum OutputFormat { 65 OFORMAT_JSON, 66 OFORMAT_HUMAN, 67 } OutputFormat; 68 69 /* Default to cache=writeback as data integrity is not important for qemu-img */ 70 #define BDRV_DEFAULT_CACHE "writeback" 71 72 static void format_print(void *opaque, const char *name) 73 { 74 printf(" %s", name); 75 } 76 77 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 78 { 79 va_list ap; 80 81 error_printf("qemu-img: "); 82 83 va_start(ap, fmt); 84 error_vprintf(fmt, ap); 85 va_end(ap); 86 87 error_printf("\nTry 'qemu-img --help' for more information\n"); 88 exit(EXIT_FAILURE); 89 } 90 91 /* Please keep in synch with qemu-img.texi */ 92 static void QEMU_NORETURN help(void) 93 { 94 const char *help_msg = 95 QEMU_IMG_VERSION 96 "usage: qemu-img [standard options] command [command options]\n" 97 "QEMU disk image utility\n" 98 "\n" 99 " '-h', '--help' display this help and exit\n" 100 " '-V', '--version' output version information and exit\n" 101 " '-T', '--trace' [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 102 " specify tracing options\n" 103 "\n" 104 "Command syntax:\n" 105 #define DEF(option, callback, arg_string) \ 106 " " arg_string "\n" 107 #include "qemu-img-cmds.h" 108 #undef DEF 109 #undef GEN_DOCS 110 "\n" 111 "Command parameters:\n" 112 " 'filename' is a disk image filename\n" 113 " 'objectdef' is a QEMU user creatable object definition. See the qemu(1)\n" 114 " manual page for a description of the object properties. The most common\n" 115 " object type is a 'secret', which is used to supply passwords and/or\n" 116 " encryption keys.\n" 117 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 118 " 'cache' is the cache mode used to write the output disk image, the valid\n" 119 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 120 " 'directsync' and 'unsafe' (default for convert)\n" 121 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 122 " options are the same as for the 'cache' option\n" 123 " 'size' is the disk image size in bytes. Optional suffixes\n" 124 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 125 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 126 " supported. 'b' is ignored.\n" 127 " 'output_filename' is the destination disk image filename\n" 128 " 'output_fmt' is the destination format\n" 129 " 'options' is a comma separated list of format specific options in a\n" 130 " name=value format. Use -o ? for an overview of the options supported by the\n" 131 " used format\n" 132 " 'snapshot_param' is param used for internal snapshot, format\n" 133 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 134 " '[ID_OR_NAME]'\n" 135 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 136 " instead\n" 137 " '-c' indicates that target image must be compressed (qcow format only)\n" 138 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 139 " match exactly. The image doesn't need a working backing file before\n" 140 " rebasing in this case (useful for renaming the backing file)\n" 141 " '-h' with or without a command shows this help and lists the supported formats\n" 142 " '-p' show progress of command (only certain commands)\n" 143 " '-q' use Quiet mode - do not print any output (except errors)\n" 144 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 145 " contain only zeros for qemu-img to create a sparse image during\n" 146 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 147 " unallocated or zero sectors, and the destination image will always be\n" 148 " fully allocated\n" 149 " '--output' takes the format in which the output must be done (human or json)\n" 150 " '-n' skips the target volume creation (useful if the volume is created\n" 151 " prior to running qemu-img)\n" 152 "\n" 153 "Parameters to check subcommand:\n" 154 " '-r' tries to repair any inconsistencies that are found during the check.\n" 155 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 156 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 157 " hiding corruption that has already occurred.\n" 158 "\n" 159 "Parameters to snapshot subcommand:\n" 160 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 161 " '-a' applies a snapshot (revert disk to saved state)\n" 162 " '-c' creates a snapshot\n" 163 " '-d' deletes a snapshot\n" 164 " '-l' lists all snapshots in the given image\n" 165 "\n" 166 "Parameters to compare subcommand:\n" 167 " '-f' first image format\n" 168 " '-F' second image format\n" 169 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 170 171 printf("%s\nSupported formats:", help_msg); 172 bdrv_iterate_format(format_print, NULL); 173 printf("\n"); 174 exit(EXIT_SUCCESS); 175 } 176 177 static QemuOptsList qemu_object_opts = { 178 .name = "object", 179 .implied_opt_name = "qom-type", 180 .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head), 181 .desc = { 182 { } 183 }, 184 }; 185 186 static QemuOptsList qemu_source_opts = { 187 .name = "source", 188 .implied_opt_name = "file", 189 .head = QTAILQ_HEAD_INITIALIZER(qemu_source_opts.head), 190 .desc = { 191 { } 192 }, 193 }; 194 195 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 196 { 197 int ret = 0; 198 if (!quiet) { 199 va_list args; 200 va_start(args, fmt); 201 ret = vprintf(fmt, args); 202 va_end(args); 203 } 204 return ret; 205 } 206 207 208 static int print_block_option_help(const char *filename, const char *fmt) 209 { 210 BlockDriver *drv, *proto_drv; 211 QemuOptsList *create_opts = NULL; 212 Error *local_err = NULL; 213 214 /* Find driver and parse its options */ 215 drv = bdrv_find_format(fmt); 216 if (!drv) { 217 error_report("Unknown file format '%s'", fmt); 218 return 1; 219 } 220 221 create_opts = qemu_opts_append(create_opts, drv->create_opts); 222 if (filename) { 223 proto_drv = bdrv_find_protocol(filename, true, &local_err); 224 if (!proto_drv) { 225 error_report_err(local_err); 226 qemu_opts_free(create_opts); 227 return 1; 228 } 229 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 230 } 231 232 qemu_opts_print_help(create_opts); 233 qemu_opts_free(create_opts); 234 return 0; 235 } 236 237 238 static int img_open_password(BlockBackend *blk, const char *filename, 239 int flags, bool quiet) 240 { 241 BlockDriverState *bs; 242 char password[256]; 243 244 bs = blk_bs(blk); 245 if (bdrv_is_encrypted(bs) && bdrv_key_required(bs) && 246 !(flags & BDRV_O_NO_IO)) { 247 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 248 if (qemu_read_password(password, sizeof(password)) < 0) { 249 error_report("No password given"); 250 return -1; 251 } 252 if (bdrv_set_key(bs, password) < 0) { 253 error_report("invalid password"); 254 return -1; 255 } 256 } 257 return 0; 258 } 259 260 261 static BlockBackend *img_open_opts(const char *optstr, 262 QemuOpts *opts, int flags, bool writethrough, 263 bool quiet) 264 { 265 QDict *options; 266 Error *local_err = NULL; 267 BlockBackend *blk; 268 options = qemu_opts_to_qdict(opts, NULL); 269 blk = blk_new_open(NULL, NULL, options, flags, &local_err); 270 if (!blk) { 271 error_reportf_err(local_err, "Could not open '%s': ", optstr); 272 return NULL; 273 } 274 blk_set_enable_write_cache(blk, !writethrough); 275 276 if (img_open_password(blk, optstr, flags, quiet) < 0) { 277 blk_unref(blk); 278 return NULL; 279 } 280 return blk; 281 } 282 283 static BlockBackend *img_open_file(const char *filename, 284 const char *fmt, int flags, 285 bool writethrough, bool quiet) 286 { 287 BlockBackend *blk; 288 Error *local_err = NULL; 289 QDict *options = NULL; 290 291 if (fmt) { 292 options = qdict_new(); 293 qdict_put(options, "driver", qstring_from_str(fmt)); 294 } 295 296 blk = blk_new_open(filename, NULL, options, flags, &local_err); 297 if (!blk) { 298 error_reportf_err(local_err, "Could not open '%s': ", filename); 299 return NULL; 300 } 301 blk_set_enable_write_cache(blk, !writethrough); 302 303 if (img_open_password(blk, filename, flags, quiet) < 0) { 304 blk_unref(blk); 305 return NULL; 306 } 307 return blk; 308 } 309 310 311 static BlockBackend *img_open(bool image_opts, 312 const char *filename, 313 const char *fmt, int flags, bool writethrough, 314 bool quiet) 315 { 316 BlockBackend *blk; 317 if (image_opts) { 318 QemuOpts *opts; 319 if (fmt) { 320 error_report("--image-opts and --format are mutually exclusive"); 321 return NULL; 322 } 323 opts = qemu_opts_parse_noisily(qemu_find_opts("source"), 324 filename, true); 325 if (!opts) { 326 return NULL; 327 } 328 blk = img_open_opts(filename, opts, flags, writethrough, quiet); 329 } else { 330 blk = img_open_file(filename, fmt, flags, writethrough, quiet); 331 } 332 return blk; 333 } 334 335 336 static int add_old_style_options(const char *fmt, QemuOpts *opts, 337 const char *base_filename, 338 const char *base_fmt) 339 { 340 Error *err = NULL; 341 342 if (base_filename) { 343 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 344 if (err) { 345 error_report("Backing file not supported for file format '%s'", 346 fmt); 347 error_free(err); 348 return -1; 349 } 350 } 351 if (base_fmt) { 352 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 353 if (err) { 354 error_report("Backing file format not supported for file " 355 "format '%s'", fmt); 356 error_free(err); 357 return -1; 358 } 359 } 360 return 0; 361 } 362 363 static int img_create(int argc, char **argv) 364 { 365 int c; 366 uint64_t img_size = -1; 367 const char *fmt = "raw"; 368 const char *base_fmt = NULL; 369 const char *filename; 370 const char *base_filename = NULL; 371 char *options = NULL; 372 Error *local_err = NULL; 373 bool quiet = false; 374 375 for(;;) { 376 static const struct option long_options[] = { 377 {"help", no_argument, 0, 'h'}, 378 {"object", required_argument, 0, OPTION_OBJECT}, 379 {0, 0, 0, 0} 380 }; 381 c = getopt_long(argc, argv, "F:b:f:he6o:q", 382 long_options, NULL); 383 if (c == -1) { 384 break; 385 } 386 switch(c) { 387 case '?': 388 case 'h': 389 help(); 390 break; 391 case 'F': 392 base_fmt = optarg; 393 break; 394 case 'b': 395 base_filename = optarg; 396 break; 397 case 'f': 398 fmt = optarg; 399 break; 400 case 'e': 401 error_report("option -e is deprecated, please use \'-o " 402 "encryption\' instead!"); 403 goto fail; 404 case '6': 405 error_report("option -6 is deprecated, please use \'-o " 406 "compat6\' instead!"); 407 goto fail; 408 case 'o': 409 if (!is_valid_option_list(optarg)) { 410 error_report("Invalid option list: %s", optarg); 411 goto fail; 412 } 413 if (!options) { 414 options = g_strdup(optarg); 415 } else { 416 char *old_options = options; 417 options = g_strdup_printf("%s,%s", options, optarg); 418 g_free(old_options); 419 } 420 break; 421 case 'q': 422 quiet = true; 423 break; 424 case OPTION_OBJECT: { 425 QemuOpts *opts; 426 opts = qemu_opts_parse_noisily(&qemu_object_opts, 427 optarg, true); 428 if (!opts) { 429 goto fail; 430 } 431 } break; 432 } 433 } 434 435 /* Get the filename */ 436 filename = (optind < argc) ? argv[optind] : NULL; 437 if (options && has_help_option(options)) { 438 g_free(options); 439 return print_block_option_help(filename, fmt); 440 } 441 442 if (optind >= argc) { 443 error_exit("Expecting image file name"); 444 } 445 optind++; 446 447 if (qemu_opts_foreach(&qemu_object_opts, 448 user_creatable_add_opts_foreach, 449 NULL, NULL)) { 450 goto fail; 451 } 452 453 /* Get image size, if specified */ 454 if (optind < argc) { 455 int64_t sval; 456 char *end; 457 sval = qemu_strtosz_suffix(argv[optind++], &end, 458 QEMU_STRTOSZ_DEFSUFFIX_B); 459 if (sval < 0 || *end) { 460 if (sval == -ERANGE) { 461 error_report("Image size must be less than 8 EiB!"); 462 } else { 463 error_report("Invalid image size specified! You may use k, M, " 464 "G, T, P or E suffixes for "); 465 error_report("kilobytes, megabytes, gigabytes, terabytes, " 466 "petabytes and exabytes."); 467 } 468 goto fail; 469 } 470 img_size = (uint64_t)sval; 471 } 472 if (optind != argc) { 473 error_exit("Unexpected argument: %s", argv[optind]); 474 } 475 476 bdrv_img_create(filename, fmt, base_filename, base_fmt, 477 options, img_size, 0, &local_err, quiet); 478 if (local_err) { 479 error_reportf_err(local_err, "%s: ", filename); 480 goto fail; 481 } 482 483 g_free(options); 484 return 0; 485 486 fail: 487 g_free(options); 488 return 1; 489 } 490 491 static void dump_json_image_check(ImageCheck *check, bool quiet) 492 { 493 QString *str; 494 QObject *obj; 495 Visitor *v = qmp_output_visitor_new(&obj); 496 497 visit_type_ImageCheck(v, NULL, &check, &error_abort); 498 visit_complete(v, &obj); 499 str = qobject_to_json_pretty(obj); 500 assert(str != NULL); 501 qprintf(quiet, "%s\n", qstring_get_str(str)); 502 qobject_decref(obj); 503 visit_free(v); 504 QDECREF(str); 505 } 506 507 static void dump_human_image_check(ImageCheck *check, bool quiet) 508 { 509 if (!(check->corruptions || check->leaks || check->check_errors)) { 510 qprintf(quiet, "No errors were found on the image.\n"); 511 } else { 512 if (check->corruptions) { 513 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 514 "Data may be corrupted, or further writes to the image " 515 "may corrupt it.\n", 516 check->corruptions); 517 } 518 519 if (check->leaks) { 520 qprintf(quiet, 521 "\n%" PRId64 " leaked clusters were found on the image.\n" 522 "This means waste of disk space, but no harm to data.\n", 523 check->leaks); 524 } 525 526 if (check->check_errors) { 527 qprintf(quiet, 528 "\n%" PRId64 529 " internal errors have occurred during the check.\n", 530 check->check_errors); 531 } 532 } 533 534 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 535 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 536 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 537 check->allocated_clusters, check->total_clusters, 538 check->allocated_clusters * 100.0 / check->total_clusters, 539 check->fragmented_clusters * 100.0 / check->allocated_clusters, 540 check->compressed_clusters * 100.0 / 541 check->allocated_clusters); 542 } 543 544 if (check->image_end_offset) { 545 qprintf(quiet, 546 "Image end offset: %" PRId64 "\n", check->image_end_offset); 547 } 548 } 549 550 static int collect_image_check(BlockDriverState *bs, 551 ImageCheck *check, 552 const char *filename, 553 const char *fmt, 554 int fix) 555 { 556 int ret; 557 BdrvCheckResult result; 558 559 ret = bdrv_check(bs, &result, fix); 560 if (ret < 0) { 561 return ret; 562 } 563 564 check->filename = g_strdup(filename); 565 check->format = g_strdup(bdrv_get_format_name(bs)); 566 check->check_errors = result.check_errors; 567 check->corruptions = result.corruptions; 568 check->has_corruptions = result.corruptions != 0; 569 check->leaks = result.leaks; 570 check->has_leaks = result.leaks != 0; 571 check->corruptions_fixed = result.corruptions_fixed; 572 check->has_corruptions_fixed = result.corruptions != 0; 573 check->leaks_fixed = result.leaks_fixed; 574 check->has_leaks_fixed = result.leaks != 0; 575 check->image_end_offset = result.image_end_offset; 576 check->has_image_end_offset = result.image_end_offset != 0; 577 check->total_clusters = result.bfi.total_clusters; 578 check->has_total_clusters = result.bfi.total_clusters != 0; 579 check->allocated_clusters = result.bfi.allocated_clusters; 580 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 581 check->fragmented_clusters = result.bfi.fragmented_clusters; 582 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 583 check->compressed_clusters = result.bfi.compressed_clusters; 584 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 585 586 return 0; 587 } 588 589 /* 590 * Checks an image for consistency. Exit codes: 591 * 592 * 0 - Check completed, image is good 593 * 1 - Check not completed because of internal errors 594 * 2 - Check completed, image is corrupted 595 * 3 - Check completed, image has leaked clusters, but is good otherwise 596 * 63 - Checks are not supported by the image format 597 */ 598 static int img_check(int argc, char **argv) 599 { 600 int c, ret; 601 OutputFormat output_format = OFORMAT_HUMAN; 602 const char *filename, *fmt, *output, *cache; 603 BlockBackend *blk; 604 BlockDriverState *bs; 605 int fix = 0; 606 int flags = BDRV_O_CHECK; 607 bool writethrough; 608 ImageCheck *check; 609 bool quiet = false; 610 bool image_opts = false; 611 612 fmt = NULL; 613 output = NULL; 614 cache = BDRV_DEFAULT_CACHE; 615 616 for(;;) { 617 int option_index = 0; 618 static const struct option long_options[] = { 619 {"help", no_argument, 0, 'h'}, 620 {"format", required_argument, 0, 'f'}, 621 {"repair", required_argument, 0, 'r'}, 622 {"output", required_argument, 0, OPTION_OUTPUT}, 623 {"object", required_argument, 0, OPTION_OBJECT}, 624 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 625 {0, 0, 0, 0} 626 }; 627 c = getopt_long(argc, argv, "hf:r:T:q", 628 long_options, &option_index); 629 if (c == -1) { 630 break; 631 } 632 switch(c) { 633 case '?': 634 case 'h': 635 help(); 636 break; 637 case 'f': 638 fmt = optarg; 639 break; 640 case 'r': 641 flags |= BDRV_O_RDWR; 642 643 if (!strcmp(optarg, "leaks")) { 644 fix = BDRV_FIX_LEAKS; 645 } else if (!strcmp(optarg, "all")) { 646 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 647 } else { 648 error_exit("Unknown option value for -r " 649 "(expecting 'leaks' or 'all'): %s", optarg); 650 } 651 break; 652 case OPTION_OUTPUT: 653 output = optarg; 654 break; 655 case 'T': 656 cache = optarg; 657 break; 658 case 'q': 659 quiet = true; 660 break; 661 case OPTION_OBJECT: { 662 QemuOpts *opts; 663 opts = qemu_opts_parse_noisily(&qemu_object_opts, 664 optarg, true); 665 if (!opts) { 666 return 1; 667 } 668 } break; 669 case OPTION_IMAGE_OPTS: 670 image_opts = true; 671 break; 672 } 673 } 674 if (optind != argc - 1) { 675 error_exit("Expecting one image file name"); 676 } 677 filename = argv[optind++]; 678 679 if (output && !strcmp(output, "json")) { 680 output_format = OFORMAT_JSON; 681 } else if (output && !strcmp(output, "human")) { 682 output_format = OFORMAT_HUMAN; 683 } else if (output) { 684 error_report("--output must be used with human or json as argument."); 685 return 1; 686 } 687 688 if (qemu_opts_foreach(&qemu_object_opts, 689 user_creatable_add_opts_foreach, 690 NULL, NULL)) { 691 return 1; 692 } 693 694 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 695 if (ret < 0) { 696 error_report("Invalid source cache option: %s", cache); 697 return 1; 698 } 699 700 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 701 if (!blk) { 702 return 1; 703 } 704 bs = blk_bs(blk); 705 706 check = g_new0(ImageCheck, 1); 707 ret = collect_image_check(bs, check, filename, fmt, fix); 708 709 if (ret == -ENOTSUP) { 710 error_report("This image format does not support checks"); 711 ret = 63; 712 goto fail; 713 } 714 715 if (check->corruptions_fixed || check->leaks_fixed) { 716 int corruptions_fixed, leaks_fixed; 717 718 leaks_fixed = check->leaks_fixed; 719 corruptions_fixed = check->corruptions_fixed; 720 721 if (output_format == OFORMAT_HUMAN) { 722 qprintf(quiet, 723 "The following inconsistencies were found and repaired:\n\n" 724 " %" PRId64 " leaked clusters\n" 725 " %" PRId64 " corruptions\n\n" 726 "Double checking the fixed image now...\n", 727 check->leaks_fixed, 728 check->corruptions_fixed); 729 } 730 731 ret = collect_image_check(bs, check, filename, fmt, 0); 732 733 check->leaks_fixed = leaks_fixed; 734 check->corruptions_fixed = corruptions_fixed; 735 } 736 737 if (!ret) { 738 switch (output_format) { 739 case OFORMAT_HUMAN: 740 dump_human_image_check(check, quiet); 741 break; 742 case OFORMAT_JSON: 743 dump_json_image_check(check, quiet); 744 break; 745 } 746 } 747 748 if (ret || check->check_errors) { 749 if (ret) { 750 error_report("Check failed: %s", strerror(-ret)); 751 } else { 752 error_report("Check failed"); 753 } 754 ret = 1; 755 goto fail; 756 } 757 758 if (check->corruptions) { 759 ret = 2; 760 } else if (check->leaks) { 761 ret = 3; 762 } else { 763 ret = 0; 764 } 765 766 fail: 767 qapi_free_ImageCheck(check); 768 blk_unref(blk); 769 return ret; 770 } 771 772 typedef struct CommonBlockJobCBInfo { 773 BlockDriverState *bs; 774 Error **errp; 775 } CommonBlockJobCBInfo; 776 777 static void common_block_job_cb(void *opaque, int ret) 778 { 779 CommonBlockJobCBInfo *cbi = opaque; 780 781 if (ret < 0) { 782 error_setg_errno(cbi->errp, -ret, "Block job failed"); 783 } 784 } 785 786 static void run_block_job(BlockJob *job, Error **errp) 787 { 788 AioContext *aio_context = blk_get_aio_context(job->blk); 789 790 do { 791 aio_poll(aio_context, true); 792 qemu_progress_print(job->len ? 793 ((float)job->offset / job->len * 100.f) : 0.0f, 0); 794 } while (!job->ready); 795 796 block_job_complete_sync(job, errp); 797 798 /* A block job may finish instantaneously without publishing any progress, 799 * so just signal completion here */ 800 qemu_progress_print(100.f, 0); 801 } 802 803 static int img_commit(int argc, char **argv) 804 { 805 int c, ret, flags; 806 const char *filename, *fmt, *cache, *base; 807 BlockBackend *blk; 808 BlockDriverState *bs, *base_bs; 809 bool progress = false, quiet = false, drop = false; 810 bool writethrough; 811 Error *local_err = NULL; 812 CommonBlockJobCBInfo cbi; 813 bool image_opts = false; 814 815 fmt = NULL; 816 cache = BDRV_DEFAULT_CACHE; 817 base = NULL; 818 for(;;) { 819 static const struct option long_options[] = { 820 {"help", no_argument, 0, 'h'}, 821 {"object", required_argument, 0, OPTION_OBJECT}, 822 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 823 {0, 0, 0, 0} 824 }; 825 c = getopt_long(argc, argv, "f:ht:b:dpq", 826 long_options, NULL); 827 if (c == -1) { 828 break; 829 } 830 switch(c) { 831 case '?': 832 case 'h': 833 help(); 834 break; 835 case 'f': 836 fmt = optarg; 837 break; 838 case 't': 839 cache = optarg; 840 break; 841 case 'b': 842 base = optarg; 843 /* -b implies -d */ 844 drop = true; 845 break; 846 case 'd': 847 drop = true; 848 break; 849 case 'p': 850 progress = true; 851 break; 852 case 'q': 853 quiet = true; 854 break; 855 case OPTION_OBJECT: { 856 QemuOpts *opts; 857 opts = qemu_opts_parse_noisily(&qemu_object_opts, 858 optarg, true); 859 if (!opts) { 860 return 1; 861 } 862 } break; 863 case OPTION_IMAGE_OPTS: 864 image_opts = true; 865 break; 866 } 867 } 868 869 /* Progress is not shown in Quiet mode */ 870 if (quiet) { 871 progress = false; 872 } 873 874 if (optind != argc - 1) { 875 error_exit("Expecting one image file name"); 876 } 877 filename = argv[optind++]; 878 879 if (qemu_opts_foreach(&qemu_object_opts, 880 user_creatable_add_opts_foreach, 881 NULL, NULL)) { 882 return 1; 883 } 884 885 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 886 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 887 if (ret < 0) { 888 error_report("Invalid cache option: %s", cache); 889 return 1; 890 } 891 892 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 893 if (!blk) { 894 return 1; 895 } 896 bs = blk_bs(blk); 897 898 qemu_progress_init(progress, 1.f); 899 qemu_progress_print(0.f, 100); 900 901 if (base) { 902 base_bs = bdrv_find_backing_image(bs, base); 903 if (!base_bs) { 904 error_setg(&local_err, QERR_BASE_NOT_FOUND, base); 905 goto done; 906 } 907 } else { 908 /* This is different from QMP, which by default uses the deepest file in 909 * the backing chain (i.e., the very base); however, the traditional 910 * behavior of qemu-img commit is using the immediate backing file. */ 911 base_bs = backing_bs(bs); 912 if (!base_bs) { 913 error_setg(&local_err, "Image does not have a backing file"); 914 goto done; 915 } 916 } 917 918 cbi = (CommonBlockJobCBInfo){ 919 .errp = &local_err, 920 .bs = bs, 921 }; 922 923 commit_active_start("commit", bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 924 common_block_job_cb, &cbi, &local_err); 925 if (local_err) { 926 goto done; 927 } 928 929 /* When the block job completes, the BlockBackend reference will point to 930 * the old backing file. In order to avoid that the top image is already 931 * deleted, so we can still empty it afterwards, increment the reference 932 * counter here preemptively. */ 933 if (!drop) { 934 bdrv_ref(bs); 935 } 936 937 run_block_job(bs->job, &local_err); 938 if (local_err) { 939 goto unref_backing; 940 } 941 942 if (!drop && bs->drv->bdrv_make_empty) { 943 ret = bs->drv->bdrv_make_empty(bs); 944 if (ret) { 945 error_setg_errno(&local_err, -ret, "Could not empty %s", 946 filename); 947 goto unref_backing; 948 } 949 } 950 951 unref_backing: 952 if (!drop) { 953 bdrv_unref(bs); 954 } 955 956 done: 957 qemu_progress_end(); 958 959 blk_unref(blk); 960 961 if (local_err) { 962 error_report_err(local_err); 963 return 1; 964 } 965 966 qprintf(quiet, "Image committed.\n"); 967 return 0; 968 } 969 970 /* 971 * Returns true iff the first sector pointed to by 'buf' contains at least 972 * a non-NUL byte. 973 * 974 * 'pnum' is set to the number of sectors (including and immediately following 975 * the first one) that are known to be in the same allocated/unallocated state. 976 */ 977 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 978 { 979 bool is_zero; 980 int i; 981 982 if (n <= 0) { 983 *pnum = 0; 984 return 0; 985 } 986 is_zero = buffer_is_zero(buf, 512); 987 for(i = 1; i < n; i++) { 988 buf += 512; 989 if (is_zero != buffer_is_zero(buf, 512)) { 990 break; 991 } 992 } 993 *pnum = i; 994 return !is_zero; 995 } 996 997 /* 998 * Like is_allocated_sectors, but if the buffer starts with a used sector, 999 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 1000 * breaking up write requests for only small sparse areas. 1001 */ 1002 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 1003 int min) 1004 { 1005 int ret; 1006 int num_checked, num_used; 1007 1008 if (n < min) { 1009 min = n; 1010 } 1011 1012 ret = is_allocated_sectors(buf, n, pnum); 1013 if (!ret) { 1014 return ret; 1015 } 1016 1017 num_used = *pnum; 1018 buf += BDRV_SECTOR_SIZE * *pnum; 1019 n -= *pnum; 1020 num_checked = num_used; 1021 1022 while (n > 0) { 1023 ret = is_allocated_sectors(buf, n, pnum); 1024 1025 buf += BDRV_SECTOR_SIZE * *pnum; 1026 n -= *pnum; 1027 num_checked += *pnum; 1028 if (ret) { 1029 num_used = num_checked; 1030 } else if (*pnum >= min) { 1031 break; 1032 } 1033 } 1034 1035 *pnum = num_used; 1036 return 1; 1037 } 1038 1039 /* 1040 * Compares two buffers sector by sector. Returns 0 if the first sector of both 1041 * buffers matches, non-zero otherwise. 1042 * 1043 * pnum is set to the number of sectors (including and immediately following 1044 * the first one) that are known to have the same comparison result 1045 */ 1046 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 1047 int *pnum) 1048 { 1049 bool res; 1050 int i; 1051 1052 if (n <= 0) { 1053 *pnum = 0; 1054 return 0; 1055 } 1056 1057 res = !!memcmp(buf1, buf2, 512); 1058 for(i = 1; i < n; i++) { 1059 buf1 += 512; 1060 buf2 += 512; 1061 1062 if (!!memcmp(buf1, buf2, 512) != res) { 1063 break; 1064 } 1065 } 1066 1067 *pnum = i; 1068 return res; 1069 } 1070 1071 #define IO_BUF_SIZE (2 * 1024 * 1024) 1072 1073 static int64_t sectors_to_bytes(int64_t sectors) 1074 { 1075 return sectors << BDRV_SECTOR_BITS; 1076 } 1077 1078 static int64_t sectors_to_process(int64_t total, int64_t from) 1079 { 1080 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 1081 } 1082 1083 /* 1084 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 1085 * 1086 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 1087 * data and negative value on error. 1088 * 1089 * @param blk: BlockBackend for the image 1090 * @param sect_num: Number of first sector to check 1091 * @param sect_count: Number of sectors to check 1092 * @param filename: Name of disk file we are checking (logging purpose) 1093 * @param buffer: Allocated buffer for storing read data 1094 * @param quiet: Flag for quiet mode 1095 */ 1096 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 1097 int sect_count, const char *filename, 1098 uint8_t *buffer, bool quiet) 1099 { 1100 int pnum, ret = 0; 1101 ret = blk_pread(blk, sect_num << BDRV_SECTOR_BITS, buffer, 1102 sect_count << BDRV_SECTOR_BITS); 1103 if (ret < 0) { 1104 error_report("Error while reading offset %" PRId64 " of %s: %s", 1105 sectors_to_bytes(sect_num), filename, strerror(-ret)); 1106 return ret; 1107 } 1108 ret = is_allocated_sectors(buffer, sect_count, &pnum); 1109 if (ret || pnum != sect_count) { 1110 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1111 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 1112 return 1; 1113 } 1114 1115 return 0; 1116 } 1117 1118 /* 1119 * Compares two images. Exit codes: 1120 * 1121 * 0 - Images are identical 1122 * 1 - Images differ 1123 * >1 - Error occurred 1124 */ 1125 static int img_compare(int argc, char **argv) 1126 { 1127 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 1128 BlockBackend *blk1, *blk2; 1129 BlockDriverState *bs1, *bs2; 1130 int64_t total_sectors1, total_sectors2; 1131 uint8_t *buf1 = NULL, *buf2 = NULL; 1132 int pnum1, pnum2; 1133 int allocated1, allocated2; 1134 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 1135 bool progress = false, quiet = false, strict = false; 1136 int flags; 1137 bool writethrough; 1138 int64_t total_sectors; 1139 int64_t sector_num = 0; 1140 int64_t nb_sectors; 1141 int c, pnum; 1142 uint64_t progress_base; 1143 bool image_opts = false; 1144 1145 cache = BDRV_DEFAULT_CACHE; 1146 for (;;) { 1147 static const struct option long_options[] = { 1148 {"help", no_argument, 0, 'h'}, 1149 {"object", required_argument, 0, OPTION_OBJECT}, 1150 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 1151 {0, 0, 0, 0} 1152 }; 1153 c = getopt_long(argc, argv, "hf:F:T:pqs", 1154 long_options, NULL); 1155 if (c == -1) { 1156 break; 1157 } 1158 switch (c) { 1159 case '?': 1160 case 'h': 1161 help(); 1162 break; 1163 case 'f': 1164 fmt1 = optarg; 1165 break; 1166 case 'F': 1167 fmt2 = optarg; 1168 break; 1169 case 'T': 1170 cache = optarg; 1171 break; 1172 case 'p': 1173 progress = true; 1174 break; 1175 case 'q': 1176 quiet = true; 1177 break; 1178 case 's': 1179 strict = true; 1180 break; 1181 case OPTION_OBJECT: { 1182 QemuOpts *opts; 1183 opts = qemu_opts_parse_noisily(&qemu_object_opts, 1184 optarg, true); 1185 if (!opts) { 1186 ret = 2; 1187 goto out4; 1188 } 1189 } break; 1190 case OPTION_IMAGE_OPTS: 1191 image_opts = true; 1192 break; 1193 } 1194 } 1195 1196 /* Progress is not shown in Quiet mode */ 1197 if (quiet) { 1198 progress = false; 1199 } 1200 1201 1202 if (optind != argc - 2) { 1203 error_exit("Expecting two image file names"); 1204 } 1205 filename1 = argv[optind++]; 1206 filename2 = argv[optind++]; 1207 1208 if (qemu_opts_foreach(&qemu_object_opts, 1209 user_creatable_add_opts_foreach, 1210 NULL, NULL)) { 1211 ret = 2; 1212 goto out4; 1213 } 1214 1215 /* Initialize before goto out */ 1216 qemu_progress_init(progress, 2.0); 1217 1218 flags = 0; 1219 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 1220 if (ret < 0) { 1221 error_report("Invalid source cache option: %s", cache); 1222 ret = 2; 1223 goto out3; 1224 } 1225 1226 blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet); 1227 if (!blk1) { 1228 ret = 2; 1229 goto out3; 1230 } 1231 1232 blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet); 1233 if (!blk2) { 1234 ret = 2; 1235 goto out2; 1236 } 1237 bs1 = blk_bs(blk1); 1238 bs2 = blk_bs(blk2); 1239 1240 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1241 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1242 total_sectors1 = blk_nb_sectors(blk1); 1243 if (total_sectors1 < 0) { 1244 error_report("Can't get size of %s: %s", 1245 filename1, strerror(-total_sectors1)); 1246 ret = 4; 1247 goto out; 1248 } 1249 total_sectors2 = blk_nb_sectors(blk2); 1250 if (total_sectors2 < 0) { 1251 error_report("Can't get size of %s: %s", 1252 filename2, strerror(-total_sectors2)); 1253 ret = 4; 1254 goto out; 1255 } 1256 total_sectors = MIN(total_sectors1, total_sectors2); 1257 progress_base = MAX(total_sectors1, total_sectors2); 1258 1259 qemu_progress_print(0, 100); 1260 1261 if (strict && total_sectors1 != total_sectors2) { 1262 ret = 1; 1263 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1264 goto out; 1265 } 1266 1267 for (;;) { 1268 int64_t status1, status2; 1269 BlockDriverState *file; 1270 1271 nb_sectors = sectors_to_process(total_sectors, sector_num); 1272 if (nb_sectors <= 0) { 1273 break; 1274 } 1275 status1 = bdrv_get_block_status_above(bs1, NULL, sector_num, 1276 total_sectors1 - sector_num, 1277 &pnum1, &file); 1278 if (status1 < 0) { 1279 ret = 3; 1280 error_report("Sector allocation test failed for %s", filename1); 1281 goto out; 1282 } 1283 allocated1 = status1 & BDRV_BLOCK_ALLOCATED; 1284 1285 status2 = bdrv_get_block_status_above(bs2, NULL, sector_num, 1286 total_sectors2 - sector_num, 1287 &pnum2, &file); 1288 if (status2 < 0) { 1289 ret = 3; 1290 error_report("Sector allocation test failed for %s", filename2); 1291 goto out; 1292 } 1293 allocated2 = status2 & BDRV_BLOCK_ALLOCATED; 1294 if (pnum1) { 1295 nb_sectors = MIN(nb_sectors, pnum1); 1296 } 1297 if (pnum2) { 1298 nb_sectors = MIN(nb_sectors, pnum2); 1299 } 1300 1301 if (strict) { 1302 if ((status1 & ~BDRV_BLOCK_OFFSET_MASK) != 1303 (status2 & ~BDRV_BLOCK_OFFSET_MASK)) { 1304 ret = 1; 1305 qprintf(quiet, "Strict mode: Offset %" PRId64 1306 " block status mismatch!\n", 1307 sectors_to_bytes(sector_num)); 1308 goto out; 1309 } 1310 } 1311 if ((status1 & BDRV_BLOCK_ZERO) && (status2 & BDRV_BLOCK_ZERO)) { 1312 nb_sectors = MIN(pnum1, pnum2); 1313 } else if (allocated1 == allocated2) { 1314 if (allocated1) { 1315 ret = blk_pread(blk1, sector_num << BDRV_SECTOR_BITS, buf1, 1316 nb_sectors << BDRV_SECTOR_BITS); 1317 if (ret < 0) { 1318 error_report("Error while reading offset %" PRId64 " of %s:" 1319 " %s", sectors_to_bytes(sector_num), filename1, 1320 strerror(-ret)); 1321 ret = 4; 1322 goto out; 1323 } 1324 ret = blk_pread(blk2, sector_num << BDRV_SECTOR_BITS, buf2, 1325 nb_sectors << BDRV_SECTOR_BITS); 1326 if (ret < 0) { 1327 error_report("Error while reading offset %" PRId64 1328 " of %s: %s", sectors_to_bytes(sector_num), 1329 filename2, strerror(-ret)); 1330 ret = 4; 1331 goto out; 1332 } 1333 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1334 if (ret || pnum != nb_sectors) { 1335 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1336 sectors_to_bytes( 1337 ret ? sector_num : sector_num + pnum)); 1338 ret = 1; 1339 goto out; 1340 } 1341 } 1342 } else { 1343 1344 if (allocated1) { 1345 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1346 filename1, buf1, quiet); 1347 } else { 1348 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1349 filename2, buf1, quiet); 1350 } 1351 if (ret) { 1352 if (ret < 0) { 1353 error_report("Error while reading offset %" PRId64 ": %s", 1354 sectors_to_bytes(sector_num), strerror(-ret)); 1355 ret = 4; 1356 } 1357 goto out; 1358 } 1359 } 1360 sector_num += nb_sectors; 1361 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1362 } 1363 1364 if (total_sectors1 != total_sectors2) { 1365 BlockBackend *blk_over; 1366 int64_t total_sectors_over; 1367 const char *filename_over; 1368 1369 qprintf(quiet, "Warning: Image size mismatch!\n"); 1370 if (total_sectors1 > total_sectors2) { 1371 total_sectors_over = total_sectors1; 1372 blk_over = blk1; 1373 filename_over = filename1; 1374 } else { 1375 total_sectors_over = total_sectors2; 1376 blk_over = blk2; 1377 filename_over = filename2; 1378 } 1379 1380 for (;;) { 1381 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1382 if (nb_sectors <= 0) { 1383 break; 1384 } 1385 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1386 nb_sectors, &pnum); 1387 if (ret < 0) { 1388 ret = 3; 1389 error_report("Sector allocation test failed for %s", 1390 filename_over); 1391 goto out; 1392 1393 } 1394 nb_sectors = pnum; 1395 if (ret) { 1396 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1397 filename_over, buf1, quiet); 1398 if (ret) { 1399 if (ret < 0) { 1400 error_report("Error while reading offset %" PRId64 1401 " of %s: %s", sectors_to_bytes(sector_num), 1402 filename_over, strerror(-ret)); 1403 ret = 4; 1404 } 1405 goto out; 1406 } 1407 } 1408 sector_num += nb_sectors; 1409 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1410 } 1411 } 1412 1413 qprintf(quiet, "Images are identical.\n"); 1414 ret = 0; 1415 1416 out: 1417 qemu_vfree(buf1); 1418 qemu_vfree(buf2); 1419 blk_unref(blk2); 1420 out2: 1421 blk_unref(blk1); 1422 out3: 1423 qemu_progress_end(); 1424 out4: 1425 return ret; 1426 } 1427 1428 enum ImgConvertBlockStatus { 1429 BLK_DATA, 1430 BLK_ZERO, 1431 BLK_BACKING_FILE, 1432 }; 1433 1434 typedef struct ImgConvertState { 1435 BlockBackend **src; 1436 int64_t *src_sectors; 1437 int src_cur, src_num; 1438 int64_t src_cur_offset; 1439 int64_t total_sectors; 1440 int64_t allocated_sectors; 1441 enum ImgConvertBlockStatus status; 1442 int64_t sector_next_status; 1443 BlockBackend *target; 1444 bool has_zero_init; 1445 bool compressed; 1446 bool target_has_backing; 1447 int min_sparse; 1448 size_t cluster_sectors; 1449 size_t buf_sectors; 1450 } ImgConvertState; 1451 1452 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1453 { 1454 assert(sector_num >= s->src_cur_offset); 1455 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1456 s->src_cur_offset += s->src_sectors[s->src_cur]; 1457 s->src_cur++; 1458 assert(s->src_cur < s->src_num); 1459 } 1460 } 1461 1462 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1463 { 1464 int64_t ret; 1465 int n; 1466 1467 convert_select_part(s, sector_num); 1468 1469 assert(s->total_sectors > sector_num); 1470 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1471 1472 if (s->sector_next_status <= sector_num) { 1473 BlockDriverState *file; 1474 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1475 sector_num - s->src_cur_offset, 1476 n, &n, &file); 1477 if (ret < 0) { 1478 return ret; 1479 } 1480 1481 if (ret & BDRV_BLOCK_ZERO) { 1482 s->status = BLK_ZERO; 1483 } else if (ret & BDRV_BLOCK_DATA) { 1484 s->status = BLK_DATA; 1485 } else if (!s->target_has_backing) { 1486 /* Without a target backing file we must copy over the contents of 1487 * the backing file as well. */ 1488 /* Check block status of the backing file chain to avoid 1489 * needlessly reading zeroes and limiting the iteration to the 1490 * buffer size */ 1491 ret = bdrv_get_block_status_above(blk_bs(s->src[s->src_cur]), NULL, 1492 sector_num - s->src_cur_offset, 1493 n, &n, &file); 1494 if (ret < 0) { 1495 return ret; 1496 } 1497 1498 if (ret & BDRV_BLOCK_ZERO) { 1499 s->status = BLK_ZERO; 1500 } else { 1501 s->status = BLK_DATA; 1502 } 1503 } else { 1504 s->status = BLK_BACKING_FILE; 1505 } 1506 1507 s->sector_next_status = sector_num + n; 1508 } 1509 1510 n = MIN(n, s->sector_next_status - sector_num); 1511 if (s->status == BLK_DATA) { 1512 n = MIN(n, s->buf_sectors); 1513 } 1514 1515 /* We need to write complete clusters for compressed images, so if an 1516 * unallocated area is shorter than that, we must consider the whole 1517 * cluster allocated. */ 1518 if (s->compressed) { 1519 if (n < s->cluster_sectors) { 1520 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1521 s->status = BLK_DATA; 1522 } else { 1523 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1524 } 1525 } 1526 1527 return n; 1528 } 1529 1530 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1531 uint8_t *buf) 1532 { 1533 int n; 1534 int ret; 1535 1536 assert(nb_sectors <= s->buf_sectors); 1537 while (nb_sectors > 0) { 1538 BlockBackend *blk; 1539 int64_t bs_sectors; 1540 1541 /* In the case of compression with multiple source files, we can get a 1542 * nb_sectors that spreads into the next part. So we must be able to 1543 * read across multiple BDSes for one convert_read() call. */ 1544 convert_select_part(s, sector_num); 1545 blk = s->src[s->src_cur]; 1546 bs_sectors = s->src_sectors[s->src_cur]; 1547 1548 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1549 ret = blk_pread(blk, 1550 (sector_num - s->src_cur_offset) << BDRV_SECTOR_BITS, 1551 buf, n << BDRV_SECTOR_BITS); 1552 if (ret < 0) { 1553 return ret; 1554 } 1555 1556 sector_num += n; 1557 nb_sectors -= n; 1558 buf += n * BDRV_SECTOR_SIZE; 1559 } 1560 1561 return 0; 1562 } 1563 1564 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1565 const uint8_t *buf) 1566 { 1567 int ret; 1568 1569 while (nb_sectors > 0) { 1570 int n = nb_sectors; 1571 1572 switch (s->status) { 1573 case BLK_BACKING_FILE: 1574 /* If we have a backing file, leave clusters unallocated that are 1575 * unallocated in the source image, so that the backing file is 1576 * visible at the respective offset. */ 1577 assert(s->target_has_backing); 1578 break; 1579 1580 case BLK_DATA: 1581 /* We must always write compressed clusters as a whole, so don't 1582 * try to find zeroed parts in the buffer. We can only save the 1583 * write if the buffer is completely zeroed and we're allowed to 1584 * keep the target sparse. */ 1585 if (s->compressed) { 1586 if (s->has_zero_init && s->min_sparse && 1587 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1588 { 1589 assert(!s->target_has_backing); 1590 break; 1591 } 1592 1593 ret = blk_pwrite_compressed(s->target, 1594 sector_num << BDRV_SECTOR_BITS, 1595 buf, n << BDRV_SECTOR_BITS); 1596 if (ret < 0) { 1597 return ret; 1598 } 1599 break; 1600 } 1601 1602 /* If there is real non-zero data or we're told to keep the target 1603 * fully allocated (-S 0), we must write it. Otherwise we can treat 1604 * it as zero sectors. */ 1605 if (!s->min_sparse || 1606 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1607 { 1608 ret = blk_pwrite(s->target, sector_num << BDRV_SECTOR_BITS, 1609 buf, n << BDRV_SECTOR_BITS, 0); 1610 if (ret < 0) { 1611 return ret; 1612 } 1613 break; 1614 } 1615 /* fall-through */ 1616 1617 case BLK_ZERO: 1618 if (s->has_zero_init) { 1619 break; 1620 } 1621 ret = blk_pwrite_zeroes(s->target, sector_num << BDRV_SECTOR_BITS, 1622 n << BDRV_SECTOR_BITS, 0); 1623 if (ret < 0) { 1624 return ret; 1625 } 1626 break; 1627 } 1628 1629 sector_num += n; 1630 nb_sectors -= n; 1631 buf += n * BDRV_SECTOR_SIZE; 1632 } 1633 1634 return 0; 1635 } 1636 1637 static int convert_do_copy(ImgConvertState *s) 1638 { 1639 uint8_t *buf = NULL; 1640 int64_t sector_num, allocated_done; 1641 int ret; 1642 int n; 1643 1644 /* Check whether we have zero initialisation or can get it efficiently */ 1645 s->has_zero_init = s->min_sparse && !s->target_has_backing 1646 ? bdrv_has_zero_init(blk_bs(s->target)) 1647 : false; 1648 1649 if (!s->has_zero_init && !s->target_has_backing && 1650 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1651 { 1652 ret = blk_make_zero(s->target, BDRV_REQ_MAY_UNMAP); 1653 if (ret == 0) { 1654 s->has_zero_init = true; 1655 } 1656 } 1657 1658 /* Allocate buffer for copied data. For compressed images, only one cluster 1659 * can be copied at a time. */ 1660 if (s->compressed) { 1661 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1662 error_report("invalid cluster size"); 1663 ret = -EINVAL; 1664 goto fail; 1665 } 1666 s->buf_sectors = s->cluster_sectors; 1667 } 1668 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1669 1670 /* Calculate allocated sectors for progress */ 1671 s->allocated_sectors = 0; 1672 sector_num = 0; 1673 while (sector_num < s->total_sectors) { 1674 n = convert_iteration_sectors(s, sector_num); 1675 if (n < 0) { 1676 ret = n; 1677 goto fail; 1678 } 1679 if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) 1680 { 1681 s->allocated_sectors += n; 1682 } 1683 sector_num += n; 1684 } 1685 1686 /* Do the copy */ 1687 s->src_cur = 0; 1688 s->src_cur_offset = 0; 1689 s->sector_next_status = 0; 1690 1691 sector_num = 0; 1692 allocated_done = 0; 1693 1694 while (sector_num < s->total_sectors) { 1695 n = convert_iteration_sectors(s, sector_num); 1696 if (n < 0) { 1697 ret = n; 1698 goto fail; 1699 } 1700 if (s->status == BLK_DATA || (!s->min_sparse && s->status == BLK_ZERO)) 1701 { 1702 allocated_done += n; 1703 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1704 0); 1705 } 1706 1707 if (s->status == BLK_DATA) { 1708 ret = convert_read(s, sector_num, n, buf); 1709 if (ret < 0) { 1710 error_report("error while reading sector %" PRId64 1711 ": %s", sector_num, strerror(-ret)); 1712 goto fail; 1713 } 1714 } else if (!s->min_sparse && s->status == BLK_ZERO) { 1715 n = MIN(n, s->buf_sectors); 1716 memset(buf, 0, n * BDRV_SECTOR_SIZE); 1717 s->status = BLK_DATA; 1718 } 1719 1720 ret = convert_write(s, sector_num, n, buf); 1721 if (ret < 0) { 1722 error_report("error while writing sector %" PRId64 1723 ": %s", sector_num, strerror(-ret)); 1724 goto fail; 1725 } 1726 1727 sector_num += n; 1728 } 1729 1730 if (s->compressed) { 1731 /* signal EOF to align */ 1732 ret = blk_pwrite_compressed(s->target, 0, NULL, 0); 1733 if (ret < 0) { 1734 goto fail; 1735 } 1736 } 1737 1738 ret = 0; 1739 fail: 1740 qemu_vfree(buf); 1741 return ret; 1742 } 1743 1744 static int img_convert(int argc, char **argv) 1745 { 1746 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1747 int64_t ret = 0; 1748 int progress = 0, flags, src_flags; 1749 bool writethrough, src_writethrough; 1750 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1751 BlockDriver *drv, *proto_drv; 1752 BlockBackend **blk = NULL, *out_blk = NULL; 1753 BlockDriverState **bs = NULL, *out_bs = NULL; 1754 int64_t total_sectors; 1755 int64_t *bs_sectors = NULL; 1756 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1757 BlockDriverInfo bdi; 1758 QemuOpts *opts = NULL; 1759 QemuOptsList *create_opts = NULL; 1760 const char *out_baseimg_param; 1761 char *options = NULL; 1762 const char *snapshot_name = NULL; 1763 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1764 bool quiet = false; 1765 Error *local_err = NULL; 1766 QemuOpts *sn_opts = NULL; 1767 ImgConvertState state; 1768 bool image_opts = false; 1769 1770 fmt = NULL; 1771 out_fmt = "raw"; 1772 cache = "unsafe"; 1773 src_cache = BDRV_DEFAULT_CACHE; 1774 out_baseimg = NULL; 1775 compress = 0; 1776 skip_create = 0; 1777 for(;;) { 1778 static const struct option long_options[] = { 1779 {"help", no_argument, 0, 'h'}, 1780 {"object", required_argument, 0, OPTION_OBJECT}, 1781 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 1782 {0, 0, 0, 0} 1783 }; 1784 c = getopt_long(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn", 1785 long_options, NULL); 1786 if (c == -1) { 1787 break; 1788 } 1789 switch(c) { 1790 case '?': 1791 case 'h': 1792 help(); 1793 break; 1794 case 'f': 1795 fmt = optarg; 1796 break; 1797 case 'O': 1798 out_fmt = optarg; 1799 break; 1800 case 'B': 1801 out_baseimg = optarg; 1802 break; 1803 case 'c': 1804 compress = 1; 1805 break; 1806 case 'e': 1807 error_report("option -e is deprecated, please use \'-o " 1808 "encryption\' instead!"); 1809 ret = -1; 1810 goto fail_getopt; 1811 case '6': 1812 error_report("option -6 is deprecated, please use \'-o " 1813 "compat6\' instead!"); 1814 ret = -1; 1815 goto fail_getopt; 1816 case 'o': 1817 if (!is_valid_option_list(optarg)) { 1818 error_report("Invalid option list: %s", optarg); 1819 ret = -1; 1820 goto fail_getopt; 1821 } 1822 if (!options) { 1823 options = g_strdup(optarg); 1824 } else { 1825 char *old_options = options; 1826 options = g_strdup_printf("%s,%s", options, optarg); 1827 g_free(old_options); 1828 } 1829 break; 1830 case 's': 1831 snapshot_name = optarg; 1832 break; 1833 case 'l': 1834 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1835 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1836 optarg, false); 1837 if (!sn_opts) { 1838 error_report("Failed in parsing snapshot param '%s'", 1839 optarg); 1840 ret = -1; 1841 goto fail_getopt; 1842 } 1843 } else { 1844 snapshot_name = optarg; 1845 } 1846 break; 1847 case 'S': 1848 { 1849 int64_t sval; 1850 char *end; 1851 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 1852 if (sval < 0 || *end) { 1853 error_report("Invalid minimum zero buffer size for sparse output specified"); 1854 ret = -1; 1855 goto fail_getopt; 1856 } 1857 1858 min_sparse = sval / BDRV_SECTOR_SIZE; 1859 break; 1860 } 1861 case 'p': 1862 progress = 1; 1863 break; 1864 case 't': 1865 cache = optarg; 1866 break; 1867 case 'T': 1868 src_cache = optarg; 1869 break; 1870 case 'q': 1871 quiet = true; 1872 break; 1873 case 'n': 1874 skip_create = 1; 1875 break; 1876 case OPTION_OBJECT: 1877 opts = qemu_opts_parse_noisily(&qemu_object_opts, 1878 optarg, true); 1879 if (!opts) { 1880 goto fail_getopt; 1881 } 1882 break; 1883 case OPTION_IMAGE_OPTS: 1884 image_opts = true; 1885 break; 1886 } 1887 } 1888 1889 if (qemu_opts_foreach(&qemu_object_opts, 1890 user_creatable_add_opts_foreach, 1891 NULL, NULL)) { 1892 goto fail_getopt; 1893 } 1894 1895 /* Initialize before goto out */ 1896 if (quiet) { 1897 progress = 0; 1898 } 1899 qemu_progress_init(progress, 1.0); 1900 1901 bs_n = argc - optind - 1; 1902 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1903 1904 if (options && has_help_option(options)) { 1905 ret = print_block_option_help(out_filename, out_fmt); 1906 goto out; 1907 } 1908 1909 if (bs_n < 1) { 1910 error_exit("Must specify image file name"); 1911 } 1912 1913 1914 if (bs_n > 1 && out_baseimg) { 1915 error_report("-B makes no sense when concatenating multiple input " 1916 "images"); 1917 ret = -1; 1918 goto out; 1919 } 1920 1921 src_flags = 0; 1922 ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); 1923 if (ret < 0) { 1924 error_report("Invalid source cache option: %s", src_cache); 1925 goto out; 1926 } 1927 1928 qemu_progress_print(0, 100); 1929 1930 blk = g_new0(BlockBackend *, bs_n); 1931 bs = g_new0(BlockDriverState *, bs_n); 1932 bs_sectors = g_new(int64_t, bs_n); 1933 1934 total_sectors = 0; 1935 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1936 blk[bs_i] = img_open(image_opts, argv[optind + bs_i], 1937 fmt, src_flags, src_writethrough, quiet); 1938 if (!blk[bs_i]) { 1939 ret = -1; 1940 goto out; 1941 } 1942 bs[bs_i] = blk_bs(blk[bs_i]); 1943 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1944 if (bs_sectors[bs_i] < 0) { 1945 error_report("Could not get size of %s: %s", 1946 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1947 ret = -1; 1948 goto out; 1949 } 1950 total_sectors += bs_sectors[bs_i]; 1951 } 1952 1953 if (sn_opts) { 1954 ret = bdrv_snapshot_load_tmp(bs[0], 1955 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1956 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1957 &local_err); 1958 } else if (snapshot_name != NULL) { 1959 if (bs_n > 1) { 1960 error_report("No support for concatenating multiple snapshot"); 1961 ret = -1; 1962 goto out; 1963 } 1964 1965 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1966 } 1967 if (local_err) { 1968 error_reportf_err(local_err, "Failed to load snapshot: "); 1969 ret = -1; 1970 goto out; 1971 } 1972 1973 /* Find driver and parse its options */ 1974 drv = bdrv_find_format(out_fmt); 1975 if (!drv) { 1976 error_report("Unknown file format '%s'", out_fmt); 1977 ret = -1; 1978 goto out; 1979 } 1980 1981 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1982 if (!proto_drv) { 1983 error_report_err(local_err); 1984 ret = -1; 1985 goto out; 1986 } 1987 1988 if (!skip_create) { 1989 if (!drv->create_opts) { 1990 error_report("Format driver '%s' does not support image creation", 1991 drv->format_name); 1992 ret = -1; 1993 goto out; 1994 } 1995 1996 if (!proto_drv->create_opts) { 1997 error_report("Protocol driver '%s' does not support image creation", 1998 proto_drv->format_name); 1999 ret = -1; 2000 goto out; 2001 } 2002 2003 create_opts = qemu_opts_append(create_opts, drv->create_opts); 2004 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 2005 2006 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 2007 if (options) { 2008 qemu_opts_do_parse(opts, options, NULL, &local_err); 2009 if (local_err) { 2010 error_report_err(local_err); 2011 ret = -1; 2012 goto out; 2013 } 2014 } 2015 2016 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 2017 &error_abort); 2018 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 2019 if (ret < 0) { 2020 goto out; 2021 } 2022 } 2023 2024 /* Get backing file name if -o backing_file was used */ 2025 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 2026 if (out_baseimg_param) { 2027 out_baseimg = out_baseimg_param; 2028 } 2029 2030 /* Check if compression is supported */ 2031 if (compress) { 2032 bool encryption = 2033 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 2034 const char *preallocation = 2035 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 2036 2037 if (!drv->bdrv_co_pwritev_compressed) { 2038 error_report("Compression not supported for this file format"); 2039 ret = -1; 2040 goto out; 2041 } 2042 2043 if (encryption) { 2044 error_report("Compression and encryption not supported at " 2045 "the same time"); 2046 ret = -1; 2047 goto out; 2048 } 2049 2050 if (preallocation 2051 && strcmp(preallocation, "off")) 2052 { 2053 error_report("Compression and preallocation not supported at " 2054 "the same time"); 2055 ret = -1; 2056 goto out; 2057 } 2058 } 2059 2060 if (!skip_create) { 2061 /* Create the new image */ 2062 ret = bdrv_create(drv, out_filename, opts, &local_err); 2063 if (ret < 0) { 2064 error_reportf_err(local_err, "%s: error while converting %s: ", 2065 out_filename, out_fmt); 2066 goto out; 2067 } 2068 } 2069 2070 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 2071 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 2072 if (ret < 0) { 2073 error_report("Invalid cache option: %s", cache); 2074 goto out; 2075 } 2076 2077 /* XXX we should allow --image-opts to trigger use of 2078 * img_open() here, but then we have trouble with 2079 * the bdrv_create() call which takes different params. 2080 * Not critical right now, so fix can wait... 2081 */ 2082 out_blk = img_open_file(out_filename, out_fmt, flags, writethrough, quiet); 2083 if (!out_blk) { 2084 ret = -1; 2085 goto out; 2086 } 2087 out_bs = blk_bs(out_blk); 2088 2089 /* increase bufsectors from the default 4096 (2M) if opt_transfer 2090 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 2091 * as maximum. */ 2092 bufsectors = MIN(32768, 2093 MAX(bufsectors, 2094 MAX(out_bs->bl.opt_transfer >> BDRV_SECTOR_BITS, 2095 out_bs->bl.pdiscard_alignment >> 2096 BDRV_SECTOR_BITS))); 2097 2098 if (skip_create) { 2099 int64_t output_sectors = blk_nb_sectors(out_blk); 2100 if (output_sectors < 0) { 2101 error_report("unable to get output image length: %s", 2102 strerror(-output_sectors)); 2103 ret = -1; 2104 goto out; 2105 } else if (output_sectors < total_sectors) { 2106 error_report("output file is smaller than input file"); 2107 ret = -1; 2108 goto out; 2109 } 2110 } 2111 2112 cluster_sectors = 0; 2113 ret = bdrv_get_info(out_bs, &bdi); 2114 if (ret < 0) { 2115 if (compress) { 2116 error_report("could not get block driver info"); 2117 goto out; 2118 } 2119 } else { 2120 compress = compress || bdi.needs_compressed_writes; 2121 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 2122 } 2123 2124 state = (ImgConvertState) { 2125 .src = blk, 2126 .src_sectors = bs_sectors, 2127 .src_num = bs_n, 2128 .total_sectors = total_sectors, 2129 .target = out_blk, 2130 .compressed = compress, 2131 .target_has_backing = (bool) out_baseimg, 2132 .min_sparse = min_sparse, 2133 .cluster_sectors = cluster_sectors, 2134 .buf_sectors = bufsectors, 2135 }; 2136 ret = convert_do_copy(&state); 2137 2138 out: 2139 if (!ret) { 2140 qemu_progress_print(100, 0); 2141 } 2142 qemu_progress_end(); 2143 qemu_opts_del(opts); 2144 qemu_opts_free(create_opts); 2145 qemu_opts_del(sn_opts); 2146 blk_unref(out_blk); 2147 g_free(bs); 2148 if (blk) { 2149 for (bs_i = 0; bs_i < bs_n; bs_i++) { 2150 blk_unref(blk[bs_i]); 2151 } 2152 g_free(blk); 2153 } 2154 g_free(bs_sectors); 2155 fail_getopt: 2156 g_free(options); 2157 2158 if (ret) { 2159 return 1; 2160 } 2161 return 0; 2162 } 2163 2164 2165 static void dump_snapshots(BlockDriverState *bs) 2166 { 2167 QEMUSnapshotInfo *sn_tab, *sn; 2168 int nb_sns, i; 2169 2170 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 2171 if (nb_sns <= 0) 2172 return; 2173 printf("Snapshot list:\n"); 2174 bdrv_snapshot_dump(fprintf, stdout, NULL); 2175 printf("\n"); 2176 for(i = 0; i < nb_sns; i++) { 2177 sn = &sn_tab[i]; 2178 bdrv_snapshot_dump(fprintf, stdout, sn); 2179 printf("\n"); 2180 } 2181 g_free(sn_tab); 2182 } 2183 2184 static void dump_json_image_info_list(ImageInfoList *list) 2185 { 2186 QString *str; 2187 QObject *obj; 2188 Visitor *v = qmp_output_visitor_new(&obj); 2189 2190 visit_type_ImageInfoList(v, NULL, &list, &error_abort); 2191 visit_complete(v, &obj); 2192 str = qobject_to_json_pretty(obj); 2193 assert(str != NULL); 2194 printf("%s\n", qstring_get_str(str)); 2195 qobject_decref(obj); 2196 visit_free(v); 2197 QDECREF(str); 2198 } 2199 2200 static void dump_json_image_info(ImageInfo *info) 2201 { 2202 QString *str; 2203 QObject *obj; 2204 Visitor *v = qmp_output_visitor_new(&obj); 2205 2206 visit_type_ImageInfo(v, NULL, &info, &error_abort); 2207 visit_complete(v, &obj); 2208 str = qobject_to_json_pretty(obj); 2209 assert(str != NULL); 2210 printf("%s\n", qstring_get_str(str)); 2211 qobject_decref(obj); 2212 visit_free(v); 2213 QDECREF(str); 2214 } 2215 2216 static void dump_human_image_info_list(ImageInfoList *list) 2217 { 2218 ImageInfoList *elem; 2219 bool delim = false; 2220 2221 for (elem = list; elem; elem = elem->next) { 2222 if (delim) { 2223 printf("\n"); 2224 } 2225 delim = true; 2226 2227 bdrv_image_info_dump(fprintf, stdout, elem->value); 2228 } 2229 } 2230 2231 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 2232 { 2233 return strcmp(a, b) == 0; 2234 } 2235 2236 /** 2237 * Open an image file chain and return an ImageInfoList 2238 * 2239 * @filename: topmost image filename 2240 * @fmt: topmost image format (may be NULL to autodetect) 2241 * @chain: true - enumerate entire backing file chain 2242 * false - only topmost image file 2243 * 2244 * Returns a list of ImageInfo objects or NULL if there was an error opening an 2245 * image file. If there was an error a message will have been printed to 2246 * stderr. 2247 */ 2248 static ImageInfoList *collect_image_info_list(bool image_opts, 2249 const char *filename, 2250 const char *fmt, 2251 bool chain) 2252 { 2253 ImageInfoList *head = NULL; 2254 ImageInfoList **last = &head; 2255 GHashTable *filenames; 2256 Error *err = NULL; 2257 2258 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2259 2260 while (filename) { 2261 BlockBackend *blk; 2262 BlockDriverState *bs; 2263 ImageInfo *info; 2264 ImageInfoList *elem; 2265 2266 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2267 error_report("Backing file '%s' creates an infinite loop.", 2268 filename); 2269 goto err; 2270 } 2271 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2272 2273 blk = img_open(image_opts, filename, fmt, 2274 BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false); 2275 if (!blk) { 2276 goto err; 2277 } 2278 bs = blk_bs(blk); 2279 2280 bdrv_query_image_info(bs, &info, &err); 2281 if (err) { 2282 error_report_err(err); 2283 blk_unref(blk); 2284 goto err; 2285 } 2286 2287 elem = g_new0(ImageInfoList, 1); 2288 elem->value = info; 2289 *last = elem; 2290 last = &elem->next; 2291 2292 blk_unref(blk); 2293 2294 filename = fmt = NULL; 2295 if (chain) { 2296 if (info->has_full_backing_filename) { 2297 filename = info->full_backing_filename; 2298 } else if (info->has_backing_filename) { 2299 error_report("Could not determine absolute backing filename," 2300 " but backing filename '%s' present", 2301 info->backing_filename); 2302 goto err; 2303 } 2304 if (info->has_backing_filename_format) { 2305 fmt = info->backing_filename_format; 2306 } 2307 } 2308 } 2309 g_hash_table_destroy(filenames); 2310 return head; 2311 2312 err: 2313 qapi_free_ImageInfoList(head); 2314 g_hash_table_destroy(filenames); 2315 return NULL; 2316 } 2317 2318 static int img_info(int argc, char **argv) 2319 { 2320 int c; 2321 OutputFormat output_format = OFORMAT_HUMAN; 2322 bool chain = false; 2323 const char *filename, *fmt, *output; 2324 ImageInfoList *list; 2325 bool image_opts = false; 2326 2327 fmt = NULL; 2328 output = NULL; 2329 for(;;) { 2330 int option_index = 0; 2331 static const struct option long_options[] = { 2332 {"help", no_argument, 0, 'h'}, 2333 {"format", required_argument, 0, 'f'}, 2334 {"output", required_argument, 0, OPTION_OUTPUT}, 2335 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2336 {"object", required_argument, 0, OPTION_OBJECT}, 2337 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2338 {0, 0, 0, 0} 2339 }; 2340 c = getopt_long(argc, argv, "f:h", 2341 long_options, &option_index); 2342 if (c == -1) { 2343 break; 2344 } 2345 switch(c) { 2346 case '?': 2347 case 'h': 2348 help(); 2349 break; 2350 case 'f': 2351 fmt = optarg; 2352 break; 2353 case OPTION_OUTPUT: 2354 output = optarg; 2355 break; 2356 case OPTION_BACKING_CHAIN: 2357 chain = true; 2358 break; 2359 case OPTION_OBJECT: { 2360 QemuOpts *opts; 2361 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2362 optarg, true); 2363 if (!opts) { 2364 return 1; 2365 } 2366 } break; 2367 case OPTION_IMAGE_OPTS: 2368 image_opts = true; 2369 break; 2370 } 2371 } 2372 if (optind != argc - 1) { 2373 error_exit("Expecting one image file name"); 2374 } 2375 filename = argv[optind++]; 2376 2377 if (output && !strcmp(output, "json")) { 2378 output_format = OFORMAT_JSON; 2379 } else if (output && !strcmp(output, "human")) { 2380 output_format = OFORMAT_HUMAN; 2381 } else if (output) { 2382 error_report("--output must be used with human or json as argument."); 2383 return 1; 2384 } 2385 2386 if (qemu_opts_foreach(&qemu_object_opts, 2387 user_creatable_add_opts_foreach, 2388 NULL, NULL)) { 2389 return 1; 2390 } 2391 2392 list = collect_image_info_list(image_opts, filename, fmt, chain); 2393 if (!list) { 2394 return 1; 2395 } 2396 2397 switch (output_format) { 2398 case OFORMAT_HUMAN: 2399 dump_human_image_info_list(list); 2400 break; 2401 case OFORMAT_JSON: 2402 if (chain) { 2403 dump_json_image_info_list(list); 2404 } else { 2405 dump_json_image_info(list->value); 2406 } 2407 break; 2408 } 2409 2410 qapi_free_ImageInfoList(list); 2411 return 0; 2412 } 2413 2414 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2415 MapEntry *next) 2416 { 2417 switch (output_format) { 2418 case OFORMAT_HUMAN: 2419 if (e->data && !e->has_offset) { 2420 error_report("File contains external, encrypted or compressed clusters."); 2421 exit(1); 2422 } 2423 if (e->data && !e->zero) { 2424 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2425 e->start, e->length, 2426 e->has_offset ? e->offset : 0, 2427 e->has_filename ? e->filename : ""); 2428 } 2429 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2430 * Modify the flags here to allow more coalescing. 2431 */ 2432 if (next && (!next->data || next->zero)) { 2433 next->data = false; 2434 next->zero = true; 2435 } 2436 break; 2437 case OFORMAT_JSON: 2438 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64"," 2439 " \"depth\": %"PRId64", \"zero\": %s, \"data\": %s", 2440 (e->start == 0 ? "[" : ",\n"), 2441 e->start, e->length, e->depth, 2442 e->zero ? "true" : "false", 2443 e->data ? "true" : "false"); 2444 if (e->has_offset) { 2445 printf(", \"offset\": %"PRId64"", e->offset); 2446 } 2447 putchar('}'); 2448 2449 if (!next) { 2450 printf("]\n"); 2451 } 2452 break; 2453 } 2454 } 2455 2456 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2457 int nb_sectors, MapEntry *e) 2458 { 2459 int64_t ret; 2460 int depth; 2461 BlockDriverState *file; 2462 bool has_offset; 2463 2464 /* As an optimization, we could cache the current range of unallocated 2465 * clusters in each file of the chain, and avoid querying the same 2466 * range repeatedly. 2467 */ 2468 2469 depth = 0; 2470 for (;;) { 2471 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors, 2472 &file); 2473 if (ret < 0) { 2474 return ret; 2475 } 2476 assert(nb_sectors); 2477 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2478 break; 2479 } 2480 bs = backing_bs(bs); 2481 if (bs == NULL) { 2482 ret = 0; 2483 break; 2484 } 2485 2486 depth++; 2487 } 2488 2489 has_offset = !!(ret & BDRV_BLOCK_OFFSET_VALID); 2490 2491 *e = (MapEntry) { 2492 .start = sector_num * BDRV_SECTOR_SIZE, 2493 .length = nb_sectors * BDRV_SECTOR_SIZE, 2494 .data = !!(ret & BDRV_BLOCK_DATA), 2495 .zero = !!(ret & BDRV_BLOCK_ZERO), 2496 .offset = ret & BDRV_BLOCK_OFFSET_MASK, 2497 .has_offset = has_offset, 2498 .depth = depth, 2499 .has_filename = file && has_offset, 2500 .filename = file && has_offset ? file->filename : NULL, 2501 }; 2502 2503 return 0; 2504 } 2505 2506 static inline bool entry_mergeable(const MapEntry *curr, const MapEntry *next) 2507 { 2508 if (curr->length == 0) { 2509 return false; 2510 } 2511 if (curr->zero != next->zero || 2512 curr->data != next->data || 2513 curr->depth != next->depth || 2514 curr->has_filename != next->has_filename || 2515 curr->has_offset != next->has_offset) { 2516 return false; 2517 } 2518 if (curr->has_filename && strcmp(curr->filename, next->filename)) { 2519 return false; 2520 } 2521 if (curr->has_offset && curr->offset + curr->length != next->offset) { 2522 return false; 2523 } 2524 return true; 2525 } 2526 2527 static int img_map(int argc, char **argv) 2528 { 2529 int c; 2530 OutputFormat output_format = OFORMAT_HUMAN; 2531 BlockBackend *blk; 2532 BlockDriverState *bs; 2533 const char *filename, *fmt, *output; 2534 int64_t length; 2535 MapEntry curr = { .length = 0 }, next; 2536 int ret = 0; 2537 bool image_opts = false; 2538 2539 fmt = NULL; 2540 output = NULL; 2541 for (;;) { 2542 int option_index = 0; 2543 static const struct option long_options[] = { 2544 {"help", no_argument, 0, 'h'}, 2545 {"format", required_argument, 0, 'f'}, 2546 {"output", required_argument, 0, OPTION_OUTPUT}, 2547 {"object", required_argument, 0, OPTION_OBJECT}, 2548 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2549 {0, 0, 0, 0} 2550 }; 2551 c = getopt_long(argc, argv, "f:h", 2552 long_options, &option_index); 2553 if (c == -1) { 2554 break; 2555 } 2556 switch (c) { 2557 case '?': 2558 case 'h': 2559 help(); 2560 break; 2561 case 'f': 2562 fmt = optarg; 2563 break; 2564 case OPTION_OUTPUT: 2565 output = optarg; 2566 break; 2567 case OPTION_OBJECT: { 2568 QemuOpts *opts; 2569 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2570 optarg, true); 2571 if (!opts) { 2572 return 1; 2573 } 2574 } break; 2575 case OPTION_IMAGE_OPTS: 2576 image_opts = true; 2577 break; 2578 } 2579 } 2580 if (optind != argc - 1) { 2581 error_exit("Expecting one image file name"); 2582 } 2583 filename = argv[optind]; 2584 2585 if (output && !strcmp(output, "json")) { 2586 output_format = OFORMAT_JSON; 2587 } else if (output && !strcmp(output, "human")) { 2588 output_format = OFORMAT_HUMAN; 2589 } else if (output) { 2590 error_report("--output must be used with human or json as argument."); 2591 return 1; 2592 } 2593 2594 if (qemu_opts_foreach(&qemu_object_opts, 2595 user_creatable_add_opts_foreach, 2596 NULL, NULL)) { 2597 return 1; 2598 } 2599 2600 blk = img_open(image_opts, filename, fmt, 0, false, false); 2601 if (!blk) { 2602 return 1; 2603 } 2604 bs = blk_bs(blk); 2605 2606 if (output_format == OFORMAT_HUMAN) { 2607 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2608 } 2609 2610 length = blk_getlength(blk); 2611 while (curr.start + curr.length < length) { 2612 int64_t nsectors_left; 2613 int64_t sector_num; 2614 int n; 2615 2616 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2617 2618 /* Probe up to 1 GiB at a time. */ 2619 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2620 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2621 ret = get_block_status(bs, sector_num, n, &next); 2622 2623 if (ret < 0) { 2624 error_report("Could not read file metadata: %s", strerror(-ret)); 2625 goto out; 2626 } 2627 2628 if (entry_mergeable(&curr, &next)) { 2629 curr.length += next.length; 2630 continue; 2631 } 2632 2633 if (curr.length > 0) { 2634 dump_map_entry(output_format, &curr, &next); 2635 } 2636 curr = next; 2637 } 2638 2639 dump_map_entry(output_format, &curr, NULL); 2640 2641 out: 2642 blk_unref(blk); 2643 return ret < 0; 2644 } 2645 2646 #define SNAPSHOT_LIST 1 2647 #define SNAPSHOT_CREATE 2 2648 #define SNAPSHOT_APPLY 3 2649 #define SNAPSHOT_DELETE 4 2650 2651 static int img_snapshot(int argc, char **argv) 2652 { 2653 BlockBackend *blk; 2654 BlockDriverState *bs; 2655 QEMUSnapshotInfo sn; 2656 char *filename, *snapshot_name = NULL; 2657 int c, ret = 0, bdrv_oflags; 2658 int action = 0; 2659 qemu_timeval tv; 2660 bool quiet = false; 2661 Error *err = NULL; 2662 bool image_opts = false; 2663 2664 bdrv_oflags = BDRV_O_RDWR; 2665 /* Parse commandline parameters */ 2666 for(;;) { 2667 static const struct option long_options[] = { 2668 {"help", no_argument, 0, 'h'}, 2669 {"object", required_argument, 0, OPTION_OBJECT}, 2670 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2671 {0, 0, 0, 0} 2672 }; 2673 c = getopt_long(argc, argv, "la:c:d:hq", 2674 long_options, NULL); 2675 if (c == -1) { 2676 break; 2677 } 2678 switch(c) { 2679 case '?': 2680 case 'h': 2681 help(); 2682 return 0; 2683 case 'l': 2684 if (action) { 2685 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2686 return 0; 2687 } 2688 action = SNAPSHOT_LIST; 2689 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2690 break; 2691 case 'a': 2692 if (action) { 2693 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2694 return 0; 2695 } 2696 action = SNAPSHOT_APPLY; 2697 snapshot_name = optarg; 2698 break; 2699 case 'c': 2700 if (action) { 2701 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2702 return 0; 2703 } 2704 action = SNAPSHOT_CREATE; 2705 snapshot_name = optarg; 2706 break; 2707 case 'd': 2708 if (action) { 2709 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2710 return 0; 2711 } 2712 action = SNAPSHOT_DELETE; 2713 snapshot_name = optarg; 2714 break; 2715 case 'q': 2716 quiet = true; 2717 break; 2718 case OPTION_OBJECT: { 2719 QemuOpts *opts; 2720 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2721 optarg, true); 2722 if (!opts) { 2723 return 1; 2724 } 2725 } break; 2726 case OPTION_IMAGE_OPTS: 2727 image_opts = true; 2728 break; 2729 } 2730 } 2731 2732 if (optind != argc - 1) { 2733 error_exit("Expecting one image file name"); 2734 } 2735 filename = argv[optind++]; 2736 2737 if (qemu_opts_foreach(&qemu_object_opts, 2738 user_creatable_add_opts_foreach, 2739 NULL, NULL)) { 2740 return 1; 2741 } 2742 2743 /* Open the image */ 2744 blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet); 2745 if (!blk) { 2746 return 1; 2747 } 2748 bs = blk_bs(blk); 2749 2750 /* Perform the requested action */ 2751 switch(action) { 2752 case SNAPSHOT_LIST: 2753 dump_snapshots(bs); 2754 break; 2755 2756 case SNAPSHOT_CREATE: 2757 memset(&sn, 0, sizeof(sn)); 2758 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2759 2760 qemu_gettimeofday(&tv); 2761 sn.date_sec = tv.tv_sec; 2762 sn.date_nsec = tv.tv_usec * 1000; 2763 2764 ret = bdrv_snapshot_create(bs, &sn); 2765 if (ret) { 2766 error_report("Could not create snapshot '%s': %d (%s)", 2767 snapshot_name, ret, strerror(-ret)); 2768 } 2769 break; 2770 2771 case SNAPSHOT_APPLY: 2772 ret = bdrv_snapshot_goto(bs, snapshot_name); 2773 if (ret) { 2774 error_report("Could not apply snapshot '%s': %d (%s)", 2775 snapshot_name, ret, strerror(-ret)); 2776 } 2777 break; 2778 2779 case SNAPSHOT_DELETE: 2780 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2781 if (err) { 2782 error_reportf_err(err, "Could not delete snapshot '%s': ", 2783 snapshot_name); 2784 ret = 1; 2785 } 2786 break; 2787 } 2788 2789 /* Cleanup */ 2790 blk_unref(blk); 2791 if (ret) { 2792 return 1; 2793 } 2794 return 0; 2795 } 2796 2797 static int img_rebase(int argc, char **argv) 2798 { 2799 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2800 uint8_t *buf_old = NULL; 2801 uint8_t *buf_new = NULL; 2802 BlockDriverState *bs = NULL; 2803 char *filename; 2804 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2805 int c, flags, src_flags, ret; 2806 bool writethrough, src_writethrough; 2807 int unsafe = 0; 2808 int progress = 0; 2809 bool quiet = false; 2810 Error *local_err = NULL; 2811 bool image_opts = false; 2812 2813 /* Parse commandline parameters */ 2814 fmt = NULL; 2815 cache = BDRV_DEFAULT_CACHE; 2816 src_cache = BDRV_DEFAULT_CACHE; 2817 out_baseimg = NULL; 2818 out_basefmt = NULL; 2819 for(;;) { 2820 static const struct option long_options[] = { 2821 {"help", no_argument, 0, 'h'}, 2822 {"object", required_argument, 0, OPTION_OBJECT}, 2823 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 2824 {0, 0, 0, 0} 2825 }; 2826 c = getopt_long(argc, argv, "hf:F:b:upt:T:q", 2827 long_options, NULL); 2828 if (c == -1) { 2829 break; 2830 } 2831 switch(c) { 2832 case '?': 2833 case 'h': 2834 help(); 2835 return 0; 2836 case 'f': 2837 fmt = optarg; 2838 break; 2839 case 'F': 2840 out_basefmt = optarg; 2841 break; 2842 case 'b': 2843 out_baseimg = optarg; 2844 break; 2845 case 'u': 2846 unsafe = 1; 2847 break; 2848 case 'p': 2849 progress = 1; 2850 break; 2851 case 't': 2852 cache = optarg; 2853 break; 2854 case 'T': 2855 src_cache = optarg; 2856 break; 2857 case 'q': 2858 quiet = true; 2859 break; 2860 case OPTION_OBJECT: { 2861 QemuOpts *opts; 2862 opts = qemu_opts_parse_noisily(&qemu_object_opts, 2863 optarg, true); 2864 if (!opts) { 2865 return 1; 2866 } 2867 } break; 2868 case OPTION_IMAGE_OPTS: 2869 image_opts = true; 2870 break; 2871 } 2872 } 2873 2874 if (quiet) { 2875 progress = 0; 2876 } 2877 2878 if (optind != argc - 1) { 2879 error_exit("Expecting one image file name"); 2880 } 2881 if (!unsafe && !out_baseimg) { 2882 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2883 } 2884 filename = argv[optind++]; 2885 2886 if (qemu_opts_foreach(&qemu_object_opts, 2887 user_creatable_add_opts_foreach, 2888 NULL, NULL)) { 2889 return 1; 2890 } 2891 2892 qemu_progress_init(progress, 2.0); 2893 qemu_progress_print(0, 100); 2894 2895 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2896 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 2897 if (ret < 0) { 2898 error_report("Invalid cache option: %s", cache); 2899 goto out; 2900 } 2901 2902 src_flags = 0; 2903 ret = bdrv_parse_cache_mode(src_cache, &src_flags, &src_writethrough); 2904 if (ret < 0) { 2905 error_report("Invalid source cache option: %s", src_cache); 2906 goto out; 2907 } 2908 2909 /* The source files are opened read-only, don't care about WCE */ 2910 assert((src_flags & BDRV_O_RDWR) == 0); 2911 (void) src_writethrough; 2912 2913 /* 2914 * Open the images. 2915 * 2916 * Ignore the old backing file for unsafe rebase in case we want to correct 2917 * the reference to a renamed or moved backing file. 2918 */ 2919 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 2920 if (!blk) { 2921 ret = -1; 2922 goto out; 2923 } 2924 bs = blk_bs(blk); 2925 2926 if (out_basefmt != NULL) { 2927 if (bdrv_find_format(out_basefmt) == NULL) { 2928 error_report("Invalid format name: '%s'", out_basefmt); 2929 ret = -1; 2930 goto out; 2931 } 2932 } 2933 2934 /* For safe rebasing we need to compare old and new backing file */ 2935 if (!unsafe) { 2936 char backing_name[PATH_MAX]; 2937 QDict *options = NULL; 2938 2939 if (bs->backing_format[0] != '\0') { 2940 options = qdict_new(); 2941 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2942 } 2943 2944 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2945 blk_old_backing = blk_new_open(backing_name, NULL, 2946 options, src_flags, &local_err); 2947 if (!blk_old_backing) { 2948 error_reportf_err(local_err, 2949 "Could not open old backing file '%s': ", 2950 backing_name); 2951 goto out; 2952 } 2953 2954 if (out_baseimg[0]) { 2955 if (out_basefmt) { 2956 options = qdict_new(); 2957 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2958 } else { 2959 options = NULL; 2960 } 2961 2962 blk_new_backing = blk_new_open(out_baseimg, NULL, 2963 options, src_flags, &local_err); 2964 if (!blk_new_backing) { 2965 error_reportf_err(local_err, 2966 "Could not open new backing file '%s': ", 2967 out_baseimg); 2968 goto out; 2969 } 2970 } 2971 } 2972 2973 /* 2974 * Check each unallocated cluster in the COW file. If it is unallocated, 2975 * accesses go to the backing file. We must therefore compare this cluster 2976 * in the old and new backing file, and if they differ we need to copy it 2977 * from the old backing file into the COW file. 2978 * 2979 * If qemu-img crashes during this step, no harm is done. The content of 2980 * the image is the same as the original one at any time. 2981 */ 2982 if (!unsafe) { 2983 int64_t num_sectors; 2984 int64_t old_backing_num_sectors; 2985 int64_t new_backing_num_sectors = 0; 2986 uint64_t sector; 2987 int n; 2988 float local_progress = 0; 2989 2990 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2991 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2992 2993 num_sectors = blk_nb_sectors(blk); 2994 if (num_sectors < 0) { 2995 error_report("Could not get size of '%s': %s", 2996 filename, strerror(-num_sectors)); 2997 ret = -1; 2998 goto out; 2999 } 3000 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 3001 if (old_backing_num_sectors < 0) { 3002 char backing_name[PATH_MAX]; 3003 3004 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 3005 error_report("Could not get size of '%s': %s", 3006 backing_name, strerror(-old_backing_num_sectors)); 3007 ret = -1; 3008 goto out; 3009 } 3010 if (blk_new_backing) { 3011 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 3012 if (new_backing_num_sectors < 0) { 3013 error_report("Could not get size of '%s': %s", 3014 out_baseimg, strerror(-new_backing_num_sectors)); 3015 ret = -1; 3016 goto out; 3017 } 3018 } 3019 3020 if (num_sectors != 0) { 3021 local_progress = (float)100 / 3022 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 3023 } 3024 3025 for (sector = 0; sector < num_sectors; sector += n) { 3026 3027 /* How many sectors can we handle with the next read? */ 3028 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 3029 n = (IO_BUF_SIZE / 512); 3030 } else { 3031 n = num_sectors - sector; 3032 } 3033 3034 /* If the cluster is allocated, we don't need to take action */ 3035 ret = bdrv_is_allocated(bs, sector, n, &n); 3036 if (ret < 0) { 3037 error_report("error while reading image metadata: %s", 3038 strerror(-ret)); 3039 goto out; 3040 } 3041 if (ret) { 3042 continue; 3043 } 3044 3045 /* 3046 * Read old and new backing file and take into consideration that 3047 * backing files may be smaller than the COW image. 3048 */ 3049 if (sector >= old_backing_num_sectors) { 3050 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 3051 } else { 3052 if (sector + n > old_backing_num_sectors) { 3053 n = old_backing_num_sectors - sector; 3054 } 3055 3056 ret = blk_pread(blk_old_backing, sector << BDRV_SECTOR_BITS, 3057 buf_old, n << BDRV_SECTOR_BITS); 3058 if (ret < 0) { 3059 error_report("error while reading from old backing file"); 3060 goto out; 3061 } 3062 } 3063 3064 if (sector >= new_backing_num_sectors || !blk_new_backing) { 3065 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 3066 } else { 3067 if (sector + n > new_backing_num_sectors) { 3068 n = new_backing_num_sectors - sector; 3069 } 3070 3071 ret = blk_pread(blk_new_backing, sector << BDRV_SECTOR_BITS, 3072 buf_new, n << BDRV_SECTOR_BITS); 3073 if (ret < 0) { 3074 error_report("error while reading from new backing file"); 3075 goto out; 3076 } 3077 } 3078 3079 /* If they differ, we need to write to the COW file */ 3080 uint64_t written = 0; 3081 3082 while (written < n) { 3083 int pnum; 3084 3085 if (compare_sectors(buf_old + written * 512, 3086 buf_new + written * 512, n - written, &pnum)) 3087 { 3088 ret = blk_pwrite(blk, 3089 (sector + written) << BDRV_SECTOR_BITS, 3090 buf_old + written * 512, 3091 pnum << BDRV_SECTOR_BITS, 0); 3092 if (ret < 0) { 3093 error_report("Error while writing to COW image: %s", 3094 strerror(-ret)); 3095 goto out; 3096 } 3097 } 3098 3099 written += pnum; 3100 } 3101 qemu_progress_print(local_progress, 100); 3102 } 3103 } 3104 3105 /* 3106 * Change the backing file. All clusters that are different from the old 3107 * backing file are overwritten in the COW file now, so the visible content 3108 * doesn't change when we switch the backing file. 3109 */ 3110 if (out_baseimg && *out_baseimg) { 3111 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 3112 } else { 3113 ret = bdrv_change_backing_file(bs, NULL, NULL); 3114 } 3115 3116 if (ret == -ENOSPC) { 3117 error_report("Could not change the backing file to '%s': No " 3118 "space left in the file header", out_baseimg); 3119 } else if (ret < 0) { 3120 error_report("Could not change the backing file to '%s': %s", 3121 out_baseimg, strerror(-ret)); 3122 } 3123 3124 qemu_progress_print(100, 0); 3125 /* 3126 * TODO At this point it is possible to check if any clusters that are 3127 * allocated in the COW file are the same in the backing file. If so, they 3128 * could be dropped from the COW file. Don't do this before switching the 3129 * backing file, in case of a crash this would lead to corruption. 3130 */ 3131 out: 3132 qemu_progress_end(); 3133 /* Cleanup */ 3134 if (!unsafe) { 3135 blk_unref(blk_old_backing); 3136 blk_unref(blk_new_backing); 3137 } 3138 qemu_vfree(buf_old); 3139 qemu_vfree(buf_new); 3140 3141 blk_unref(blk); 3142 if (ret) { 3143 return 1; 3144 } 3145 return 0; 3146 } 3147 3148 static int img_resize(int argc, char **argv) 3149 { 3150 Error *err = NULL; 3151 int c, ret, relative; 3152 const char *filename, *fmt, *size; 3153 int64_t n, total_size; 3154 bool quiet = false; 3155 BlockBackend *blk = NULL; 3156 QemuOpts *param; 3157 3158 static QemuOptsList resize_options = { 3159 .name = "resize_options", 3160 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 3161 .desc = { 3162 { 3163 .name = BLOCK_OPT_SIZE, 3164 .type = QEMU_OPT_SIZE, 3165 .help = "Virtual disk size" 3166 }, { 3167 /* end of list */ 3168 } 3169 }, 3170 }; 3171 bool image_opts = false; 3172 3173 /* Remove size from argv manually so that negative numbers are not treated 3174 * as options by getopt. */ 3175 if (argc < 3) { 3176 error_exit("Not enough arguments"); 3177 return 1; 3178 } 3179 3180 size = argv[--argc]; 3181 3182 /* Parse getopt arguments */ 3183 fmt = NULL; 3184 for(;;) { 3185 static const struct option long_options[] = { 3186 {"help", no_argument, 0, 'h'}, 3187 {"object", required_argument, 0, OPTION_OBJECT}, 3188 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 3189 {0, 0, 0, 0} 3190 }; 3191 c = getopt_long(argc, argv, "f:hq", 3192 long_options, NULL); 3193 if (c == -1) { 3194 break; 3195 } 3196 switch(c) { 3197 case '?': 3198 case 'h': 3199 help(); 3200 break; 3201 case 'f': 3202 fmt = optarg; 3203 break; 3204 case 'q': 3205 quiet = true; 3206 break; 3207 case OPTION_OBJECT: { 3208 QemuOpts *opts; 3209 opts = qemu_opts_parse_noisily(&qemu_object_opts, 3210 optarg, true); 3211 if (!opts) { 3212 return 1; 3213 } 3214 } break; 3215 case OPTION_IMAGE_OPTS: 3216 image_opts = true; 3217 break; 3218 } 3219 } 3220 if (optind != argc - 1) { 3221 error_exit("Expecting one image file name"); 3222 } 3223 filename = argv[optind++]; 3224 3225 if (qemu_opts_foreach(&qemu_object_opts, 3226 user_creatable_add_opts_foreach, 3227 NULL, NULL)) { 3228 return 1; 3229 } 3230 3231 /* Choose grow, shrink, or absolute resize mode */ 3232 switch (size[0]) { 3233 case '+': 3234 relative = 1; 3235 size++; 3236 break; 3237 case '-': 3238 relative = -1; 3239 size++; 3240 break; 3241 default: 3242 relative = 0; 3243 break; 3244 } 3245 3246 /* Parse size */ 3247 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 3248 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 3249 if (err) { 3250 error_report_err(err); 3251 ret = -1; 3252 qemu_opts_del(param); 3253 goto out; 3254 } 3255 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 3256 qemu_opts_del(param); 3257 3258 blk = img_open(image_opts, filename, fmt, 3259 BDRV_O_RDWR, false, quiet); 3260 if (!blk) { 3261 ret = -1; 3262 goto out; 3263 } 3264 3265 if (relative) { 3266 total_size = blk_getlength(blk) + n * relative; 3267 } else { 3268 total_size = n; 3269 } 3270 if (total_size <= 0) { 3271 error_report("New image size must be positive"); 3272 ret = -1; 3273 goto out; 3274 } 3275 3276 ret = blk_truncate(blk, total_size); 3277 switch (ret) { 3278 case 0: 3279 qprintf(quiet, "Image resized.\n"); 3280 break; 3281 case -ENOTSUP: 3282 error_report("This image does not support resize"); 3283 break; 3284 case -EACCES: 3285 error_report("Image is read-only"); 3286 break; 3287 default: 3288 error_report("Error resizing image: %s", strerror(-ret)); 3289 break; 3290 } 3291 out: 3292 blk_unref(blk); 3293 if (ret) { 3294 return 1; 3295 } 3296 return 0; 3297 } 3298 3299 static void amend_status_cb(BlockDriverState *bs, 3300 int64_t offset, int64_t total_work_size, 3301 void *opaque) 3302 { 3303 qemu_progress_print(100.f * offset / total_work_size, 0); 3304 } 3305 3306 static int img_amend(int argc, char **argv) 3307 { 3308 Error *err = NULL; 3309 int c, ret = 0; 3310 char *options = NULL; 3311 QemuOptsList *create_opts = NULL; 3312 QemuOpts *opts = NULL; 3313 const char *fmt = NULL, *filename, *cache; 3314 int flags; 3315 bool writethrough; 3316 bool quiet = false, progress = false; 3317 BlockBackend *blk = NULL; 3318 BlockDriverState *bs = NULL; 3319 bool image_opts = false; 3320 3321 cache = BDRV_DEFAULT_CACHE; 3322 for (;;) { 3323 static const struct option long_options[] = { 3324 {"help", no_argument, 0, 'h'}, 3325 {"object", required_argument, 0, OPTION_OBJECT}, 3326 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 3327 {0, 0, 0, 0} 3328 }; 3329 c = getopt_long(argc, argv, "ho:f:t:pq", 3330 long_options, NULL); 3331 if (c == -1) { 3332 break; 3333 } 3334 3335 switch (c) { 3336 case 'h': 3337 case '?': 3338 help(); 3339 break; 3340 case 'o': 3341 if (!is_valid_option_list(optarg)) { 3342 error_report("Invalid option list: %s", optarg); 3343 ret = -1; 3344 goto out_no_progress; 3345 } 3346 if (!options) { 3347 options = g_strdup(optarg); 3348 } else { 3349 char *old_options = options; 3350 options = g_strdup_printf("%s,%s", options, optarg); 3351 g_free(old_options); 3352 } 3353 break; 3354 case 'f': 3355 fmt = optarg; 3356 break; 3357 case 't': 3358 cache = optarg; 3359 break; 3360 case 'p': 3361 progress = true; 3362 break; 3363 case 'q': 3364 quiet = true; 3365 break; 3366 case OPTION_OBJECT: 3367 opts = qemu_opts_parse_noisily(&qemu_object_opts, 3368 optarg, true); 3369 if (!opts) { 3370 ret = -1; 3371 goto out_no_progress; 3372 } 3373 break; 3374 case OPTION_IMAGE_OPTS: 3375 image_opts = true; 3376 break; 3377 } 3378 } 3379 3380 if (!options) { 3381 error_exit("Must specify options (-o)"); 3382 } 3383 3384 if (qemu_opts_foreach(&qemu_object_opts, 3385 user_creatable_add_opts_foreach, 3386 NULL, NULL)) { 3387 ret = -1; 3388 goto out_no_progress; 3389 } 3390 3391 if (quiet) { 3392 progress = false; 3393 } 3394 qemu_progress_init(progress, 1.0); 3395 3396 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 3397 if (fmt && has_help_option(options)) { 3398 /* If a format is explicitly specified (and possibly no filename is 3399 * given), print option help here */ 3400 ret = print_block_option_help(filename, fmt); 3401 goto out; 3402 } 3403 3404 if (optind != argc - 1) { 3405 error_report("Expecting one image file name"); 3406 ret = -1; 3407 goto out; 3408 } 3409 3410 flags = BDRV_O_RDWR; 3411 ret = bdrv_parse_cache_mode(cache, &flags, &writethrough); 3412 if (ret < 0) { 3413 error_report("Invalid cache option: %s", cache); 3414 goto out; 3415 } 3416 3417 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 3418 if (!blk) { 3419 ret = -1; 3420 goto out; 3421 } 3422 bs = blk_bs(blk); 3423 3424 fmt = bs->drv->format_name; 3425 3426 if (has_help_option(options)) { 3427 /* If the format was auto-detected, print option help here */ 3428 ret = print_block_option_help(filename, fmt); 3429 goto out; 3430 } 3431 3432 if (!bs->drv->create_opts) { 3433 error_report("Format driver '%s' does not support any options to amend", 3434 fmt); 3435 ret = -1; 3436 goto out; 3437 } 3438 3439 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3440 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3441 if (options) { 3442 qemu_opts_do_parse(opts, options, NULL, &err); 3443 if (err) { 3444 error_report_err(err); 3445 ret = -1; 3446 goto out; 3447 } 3448 } 3449 3450 /* In case the driver does not call amend_status_cb() */ 3451 qemu_progress_print(0.f, 0); 3452 ret = bdrv_amend_options(bs, opts, &amend_status_cb, NULL); 3453 qemu_progress_print(100.f, 0); 3454 if (ret < 0) { 3455 error_report("Error while amending options: %s", strerror(-ret)); 3456 goto out; 3457 } 3458 3459 out: 3460 qemu_progress_end(); 3461 3462 out_no_progress: 3463 blk_unref(blk); 3464 qemu_opts_del(opts); 3465 qemu_opts_free(create_opts); 3466 g_free(options); 3467 3468 if (ret) { 3469 return 1; 3470 } 3471 return 0; 3472 } 3473 3474 typedef struct BenchData { 3475 BlockBackend *blk; 3476 uint64_t image_size; 3477 bool write; 3478 int bufsize; 3479 int step; 3480 int nrreq; 3481 int n; 3482 int flush_interval; 3483 bool drain_on_flush; 3484 uint8_t *buf; 3485 QEMUIOVector *qiov; 3486 3487 int in_flight; 3488 bool in_flush; 3489 uint64_t offset; 3490 } BenchData; 3491 3492 static void bench_undrained_flush_cb(void *opaque, int ret) 3493 { 3494 if (ret < 0) { 3495 error_report("Failed flush request: %s", strerror(-ret)); 3496 exit(EXIT_FAILURE); 3497 } 3498 } 3499 3500 static void bench_cb(void *opaque, int ret) 3501 { 3502 BenchData *b = opaque; 3503 BlockAIOCB *acb; 3504 3505 if (ret < 0) { 3506 error_report("Failed request: %s", strerror(-ret)); 3507 exit(EXIT_FAILURE); 3508 } 3509 3510 if (b->in_flush) { 3511 /* Just finished a flush with drained queue: Start next requests */ 3512 assert(b->in_flight == 0); 3513 b->in_flush = false; 3514 } else if (b->in_flight > 0) { 3515 int remaining = b->n - b->in_flight; 3516 3517 b->n--; 3518 b->in_flight--; 3519 3520 /* Time for flush? Drain queue if requested, then flush */ 3521 if (b->flush_interval && remaining % b->flush_interval == 0) { 3522 if (!b->in_flight || !b->drain_on_flush) { 3523 BlockCompletionFunc *cb; 3524 3525 if (b->drain_on_flush) { 3526 b->in_flush = true; 3527 cb = bench_cb; 3528 } else { 3529 cb = bench_undrained_flush_cb; 3530 } 3531 3532 acb = blk_aio_flush(b->blk, cb, b); 3533 if (!acb) { 3534 error_report("Failed to issue flush request"); 3535 exit(EXIT_FAILURE); 3536 } 3537 } 3538 if (b->drain_on_flush) { 3539 return; 3540 } 3541 } 3542 } 3543 3544 while (b->n > b->in_flight && b->in_flight < b->nrreq) { 3545 if (b->write) { 3546 acb = blk_aio_pwritev(b->blk, b->offset, b->qiov, 0, 3547 bench_cb, b); 3548 } else { 3549 acb = blk_aio_preadv(b->blk, b->offset, b->qiov, 0, 3550 bench_cb, b); 3551 } 3552 if (!acb) { 3553 error_report("Failed to issue request"); 3554 exit(EXIT_FAILURE); 3555 } 3556 b->in_flight++; 3557 b->offset += b->step; 3558 b->offset %= b->image_size; 3559 } 3560 } 3561 3562 static int img_bench(int argc, char **argv) 3563 { 3564 int c, ret = 0; 3565 const char *fmt = NULL, *filename; 3566 bool quiet = false; 3567 bool image_opts = false; 3568 bool is_write = false; 3569 int count = 75000; 3570 int depth = 64; 3571 int64_t offset = 0; 3572 size_t bufsize = 4096; 3573 int pattern = 0; 3574 size_t step = 0; 3575 int flush_interval = 0; 3576 bool drain_on_flush = true; 3577 int64_t image_size; 3578 BlockBackend *blk = NULL; 3579 BenchData data = {}; 3580 int flags = 0; 3581 bool writethrough = false; 3582 struct timeval t1, t2; 3583 int i; 3584 3585 for (;;) { 3586 static const struct option long_options[] = { 3587 {"help", no_argument, 0, 'h'}, 3588 {"flush-interval", required_argument, 0, OPTION_FLUSH_INTERVAL}, 3589 {"image-opts", no_argument, 0, OPTION_IMAGE_OPTS}, 3590 {"pattern", required_argument, 0, OPTION_PATTERN}, 3591 {"no-drain", no_argument, 0, OPTION_NO_DRAIN}, 3592 {0, 0, 0, 0} 3593 }; 3594 c = getopt_long(argc, argv, "hc:d:f:no:qs:S:t:w", long_options, NULL); 3595 if (c == -1) { 3596 break; 3597 } 3598 3599 switch (c) { 3600 case 'h': 3601 case '?': 3602 help(); 3603 break; 3604 case 'c': 3605 { 3606 char *end; 3607 errno = 0; 3608 count = strtoul(optarg, &end, 0); 3609 if (errno || *end || count > INT_MAX) { 3610 error_report("Invalid request count specified"); 3611 return 1; 3612 } 3613 break; 3614 } 3615 case 'd': 3616 { 3617 char *end; 3618 errno = 0; 3619 depth = strtoul(optarg, &end, 0); 3620 if (errno || *end || depth > INT_MAX) { 3621 error_report("Invalid queue depth specified"); 3622 return 1; 3623 } 3624 break; 3625 } 3626 case 'f': 3627 fmt = optarg; 3628 break; 3629 case 'n': 3630 flags |= BDRV_O_NATIVE_AIO; 3631 break; 3632 case 'o': 3633 { 3634 char *end; 3635 errno = 0; 3636 offset = qemu_strtosz_suffix(optarg, &end, 3637 QEMU_STRTOSZ_DEFSUFFIX_B); 3638 if (offset < 0|| *end) { 3639 error_report("Invalid offset specified"); 3640 return 1; 3641 } 3642 break; 3643 } 3644 break; 3645 case 'q': 3646 quiet = true; 3647 break; 3648 case 's': 3649 { 3650 int64_t sval; 3651 char *end; 3652 3653 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 3654 if (sval < 0 || sval > INT_MAX || *end) { 3655 error_report("Invalid buffer size specified"); 3656 return 1; 3657 } 3658 3659 bufsize = sval; 3660 break; 3661 } 3662 case 'S': 3663 { 3664 int64_t sval; 3665 char *end; 3666 3667 sval = qemu_strtosz_suffix(optarg, &end, QEMU_STRTOSZ_DEFSUFFIX_B); 3668 if (sval < 0 || sval > INT_MAX || *end) { 3669 error_report("Invalid step size specified"); 3670 return 1; 3671 } 3672 3673 step = sval; 3674 break; 3675 } 3676 case 't': 3677 ret = bdrv_parse_cache_mode(optarg, &flags, &writethrough); 3678 if (ret < 0) { 3679 error_report("Invalid cache mode"); 3680 ret = -1; 3681 goto out; 3682 } 3683 break; 3684 case 'w': 3685 flags |= BDRV_O_RDWR; 3686 is_write = true; 3687 break; 3688 case OPTION_PATTERN: 3689 { 3690 char *end; 3691 errno = 0; 3692 pattern = strtoul(optarg, &end, 0); 3693 if (errno || *end || pattern > 0xff) { 3694 error_report("Invalid pattern byte specified"); 3695 return 1; 3696 } 3697 break; 3698 } 3699 case OPTION_FLUSH_INTERVAL: 3700 { 3701 char *end; 3702 errno = 0; 3703 flush_interval = strtoul(optarg, &end, 0); 3704 if (errno || *end || flush_interval > INT_MAX) { 3705 error_report("Invalid flush interval specified"); 3706 return 1; 3707 } 3708 break; 3709 } 3710 case OPTION_NO_DRAIN: 3711 drain_on_flush = false; 3712 break; 3713 case OPTION_IMAGE_OPTS: 3714 image_opts = true; 3715 break; 3716 } 3717 } 3718 3719 if (optind != argc - 1) { 3720 error_exit("Expecting one image file name"); 3721 } 3722 filename = argv[argc - 1]; 3723 3724 if (!is_write && flush_interval) { 3725 error_report("--flush-interval is only available in write tests"); 3726 ret = -1; 3727 goto out; 3728 } 3729 if (flush_interval && flush_interval < depth) { 3730 error_report("Flush interval can't be smaller than depth"); 3731 ret = -1; 3732 goto out; 3733 } 3734 3735 blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet); 3736 if (!blk) { 3737 ret = -1; 3738 goto out; 3739 } 3740 3741 image_size = blk_getlength(blk); 3742 if (image_size < 0) { 3743 ret = image_size; 3744 goto out; 3745 } 3746 3747 data = (BenchData) { 3748 .blk = blk, 3749 .image_size = image_size, 3750 .bufsize = bufsize, 3751 .step = step ?: bufsize, 3752 .nrreq = depth, 3753 .n = count, 3754 .offset = offset, 3755 .write = is_write, 3756 .flush_interval = flush_interval, 3757 .drain_on_flush = drain_on_flush, 3758 }; 3759 printf("Sending %d %s requests, %d bytes each, %d in parallel " 3760 "(starting at offset %" PRId64 ", step size %d)\n", 3761 data.n, data.write ? "write" : "read", data.bufsize, data.nrreq, 3762 data.offset, data.step); 3763 if (flush_interval) { 3764 printf("Sending flush every %d requests\n", flush_interval); 3765 } 3766 3767 data.buf = blk_blockalign(blk, data.nrreq * data.bufsize); 3768 memset(data.buf, pattern, data.nrreq * data.bufsize); 3769 3770 data.qiov = g_new(QEMUIOVector, data.nrreq); 3771 for (i = 0; i < data.nrreq; i++) { 3772 qemu_iovec_init(&data.qiov[i], 1); 3773 qemu_iovec_add(&data.qiov[i], 3774 data.buf + i * data.bufsize, data.bufsize); 3775 } 3776 3777 gettimeofday(&t1, NULL); 3778 bench_cb(&data, 0); 3779 3780 while (data.n > 0) { 3781 main_loop_wait(false); 3782 } 3783 gettimeofday(&t2, NULL); 3784 3785 printf("Run completed in %3.3f seconds.\n", 3786 (t2.tv_sec - t1.tv_sec) 3787 + ((double)(t2.tv_usec - t1.tv_usec) / 1000000)); 3788 3789 out: 3790 qemu_vfree(data.buf); 3791 blk_unref(blk); 3792 3793 if (ret) { 3794 return 1; 3795 } 3796 return 0; 3797 } 3798 3799 3800 static const img_cmd_t img_cmds[] = { 3801 #define DEF(option, callback, arg_string) \ 3802 { option, callback }, 3803 #include "qemu-img-cmds.h" 3804 #undef DEF 3805 #undef GEN_DOCS 3806 { NULL, NULL, }, 3807 }; 3808 3809 int main(int argc, char **argv) 3810 { 3811 const img_cmd_t *cmd; 3812 const char *cmdname; 3813 Error *local_error = NULL; 3814 char *trace_file = NULL; 3815 int c; 3816 static const struct option long_options[] = { 3817 {"help", no_argument, 0, 'h'}, 3818 {"version", no_argument, 0, 'V'}, 3819 {"trace", required_argument, NULL, 'T'}, 3820 {0, 0, 0, 0} 3821 }; 3822 3823 #ifdef CONFIG_POSIX 3824 signal(SIGPIPE, SIG_IGN); 3825 #endif 3826 3827 error_set_progname(argv[0]); 3828 qemu_init_exec_dir(argv[0]); 3829 3830 if (qemu_init_main_loop(&local_error)) { 3831 error_report_err(local_error); 3832 exit(EXIT_FAILURE); 3833 } 3834 3835 qcrypto_init(&error_fatal); 3836 3837 module_call_init(MODULE_INIT_QOM); 3838 bdrv_init(); 3839 if (argc < 2) { 3840 error_exit("Not enough arguments"); 3841 } 3842 3843 qemu_add_opts(&qemu_object_opts); 3844 qemu_add_opts(&qemu_source_opts); 3845 qemu_add_opts(&qemu_trace_opts); 3846 3847 while ((c = getopt_long(argc, argv, "+hVT:", long_options, NULL)) != -1) { 3848 switch (c) { 3849 case 'h': 3850 help(); 3851 return 0; 3852 case 'V': 3853 printf(QEMU_IMG_VERSION); 3854 return 0; 3855 case 'T': 3856 g_free(trace_file); 3857 trace_file = trace_opt_parse(optarg); 3858 break; 3859 } 3860 } 3861 3862 cmdname = argv[optind]; 3863 3864 /* reset getopt_long scanning */ 3865 argc -= optind; 3866 if (argc < 1) { 3867 return 0; 3868 } 3869 argv += optind; 3870 optind = 0; 3871 3872 if (!trace_init_backends()) { 3873 exit(1); 3874 } 3875 trace_init_file(trace_file); 3876 qemu_set_log(LOG_TRACE); 3877 3878 /* find the command */ 3879 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3880 if (!strcmp(cmdname, cmd->name)) { 3881 return cmd->handler(argc, argv); 3882 } 3883 } 3884 3885 /* not found */ 3886 error_exit("Command not found: %s", cmdname); 3887 } 3888