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