qemu-img.c

   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-common.h"
  25 #include "block_int.h"
  26 #include <assert.h>
  27
  28 #ifdef _WIN32
  29 #define WIN32_LEAN_AND_MEAN
  30 #include <windows.h>
  31 #endif
  32
  33 void *get_mmap_addr(unsigned long size)
  34 {
  35     return NULL;
  36 }
  37
  38 void qemu_free(void *ptr)
  39 {
  40     free(ptr);
  41 }
  42
  43 void *qemu_malloc(size_t size)
  44 {
  45     return malloc(size);
  46 }
  47
  48 void *qemu_mallocz(size_t size)
  49 {
  50     void *ptr;
  51     ptr = qemu_malloc(size);
  52     if (!ptr)
  53         return NULL;
  54     memset(ptr, 0, size);
  55     return ptr;
  56 }
  57
  58 #ifdef _WIN32
  59
  60 void *qemu_memalign(size_t alignment, size_t size)
  61 {
  62     return VirtualAlloc(NULL, size, MEM_COMMIT, PAGE_READWRITE);
  63 }
  64
  65 #else
  66
  67 void *qemu_memalign(size_t alignment, size_t size)
  68 {
  69 #if defined(_POSIX_C_SOURCE)
  70     int ret;
  71     void *ptr;
  72     ret = posix_memalign(&ptr, alignment, size);
  73     if (ret != 0)
  74         return NULL;
  75     return ptr;
  76 #elif defined(_BSD)
  77     return valloc(size);
  78 #else
  79     return memalign(alignment, size);
  80 #endif
  81 }
  82
  83 #endif
  84
  85 char *qemu_strdup(const char *str)
  86 {
  87     char *ptr;
  88     ptr = qemu_malloc(strlen(str) + 1);
  89     if (!ptr)
  90         return NULL;
  91     strcpy(ptr, str);
  92     return ptr;
  93 }
  94
  95 static void __attribute__((noreturn)) error(const char *fmt, ...)
  96 {
  97     va_list ap;
  98     va_start(ap, fmt);
  99     fprintf(stderr, "qemu-img: ");
 100     vfprintf(stderr, fmt, ap);
 101     fprintf(stderr, "\n");
 102     exit(1);
 103     va_end(ap);
 104 }
 105
 106 static void format_print(void *opaque, const char *name)
 107 {
 108     printf(" %s", name);
 109 }
 110
 111 static void help(void)
 112 {
 113     printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2008 Fabrice Bellard\n"
 114            "usage: qemu-img command [command options]\n"
 115            "QEMU disk image utility\n"
 116            "\n"
 117            "Command syntax:\n"
 118            "  create [-e] [-6] [-b base_image] [-f fmt] filename [size]\n"
 119            "  commit [-f fmt] filename\n"
 120            "  convert [-c] [-e] [-6] [-f fmt] [-O output_fmt] filename [filename2 [...]] output_filename\n"
 121            "  info [-f fmt] filename\n"
 122            "\n"
 123            "Command parameters:\n"
 124            "  'filename' is a disk image filename\n"
 125            "  'base_image' is the read-only disk image which is used as base for a copy on\n"
 126            "    write image; the copy on write image only stores the modified data\n"
 127            "  'fmt' is the disk image format. It is guessed automatically in most cases\n"
 128            "  'size' is the disk image size in kilobytes. Optional suffixes 'M' (megabyte)\n"
 129            "    and 'G' (gigabyte) are supported\n"
 130            "  'output_filename' is the destination disk image filename\n"
 131            "  'output_fmt' is the destination format\n"
 132            "  '-c' indicates that target image must be compressed (qcow format only)\n"
 133            "  '-e' indicates that the target image must be encrypted (qcow format only)\n"
 134            "  '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n"
 135            );
 136     printf("\nSupported format:");
 137     bdrv_iterate_format(format_print, NULL);
 138     printf("\n");
 139     exit(1);
 140 }
 141
 142 #if defined(WIN32)
 143 /* XXX: put correct support for win32 */
 144 static int read_password(char *buf, int buf_size)
 145 {
 146     int c, i;
 147     printf("Password: ");
 148     fflush(stdout);
 149     i = 0;
 150     for(;;) {
 151         c = getchar();
 152         if (c == '\n')
 153             break;
 154         if (i < (buf_size - 1))
 155             buf[i++] = c;
 156     }
 157     buf[i] = '\0';
 158     return 0;
 159 }
 160
 161 #else
 162
 163 #include <termios.h>
 164
 165 static struct termios oldtty;
 166
 167 static void term_exit(void)
 168 {
 169     tcsetattr (0, TCSANOW, &oldtty);
 170 }
 171
 172 static void term_init(void)
 173 {
 174     struct termios tty;
 175
 176     tcgetattr (0, &tty);
 177     oldtty = tty;
 178
 179     tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
 180                           |INLCR|IGNCR|ICRNL|IXON);
 181     tty.c_oflag |= OPOST;
 182     tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
 183     tty.c_cflag &= ~(CSIZE|PARENB);
 184     tty.c_cflag |= CS8;
 185     tty.c_cc[VMIN] = 1;
 186     tty.c_cc[VTIME] = 0;
 187
 188     tcsetattr (0, TCSANOW, &tty);
 189
 190     atexit(term_exit);
 191 }
 192
 193 static int read_password(char *buf, int buf_size)
 194 {
 195     uint8_t ch;
 196     int i, ret;
 197
 198     printf("password: ");
 199     fflush(stdout);
 200     term_init();
 201     i = 0;
 202     for(;;) {
 203         ret = read(0, &ch, 1);
 204         if (ret == -1) {
 205             if (errno == EAGAIN || errno == EINTR) {
 206                 continue;
 207             } else {
 208                 ret = -1;
 209                 break;
 210             }
 211         } else if (ret == 0) {
 212             ret = -1;
 213             break;
 214         } else {
 215             if (ch == '\r') {
 216                 ret = 0;
 217                 break;
 218             }
 219             if (i < (buf_size - 1))
 220                 buf[i++] = ch;
 221         }
 222     }
 223     term_exit();
 224     buf[i] = '\0';
 225     printf("\n");
 226     return ret;
 227 }
 228 #endif
 229
 230 static BlockDriverState *bdrv_new_open(const char *filename,
 231                                        const char *fmt)
 232 {
 233     BlockDriverState *bs;
 234     BlockDriver *drv;
 235     char password[256];
 236
 237     bs = bdrv_new("");
 238     if (!bs)
 239         error("Not enough memory");
 240     if (fmt) {
 241         drv = bdrv_find_format(fmt);
 242         if (!drv)
 243             error("Unknown file format '%s'", fmt);
 244     } else {
 245         drv = NULL;
 246     }
 247     if (bdrv_open2(bs, filename, 0, drv) < 0) {
 248         error("Could not open '%s'", filename);
 249     }
 250     if (bdrv_is_encrypted(bs)) {
 251         printf("Disk image '%s' is encrypted.\n", filename);
 252         if (read_password(password, sizeof(password)) < 0)
 253             error("No password given");
 254         if (bdrv_set_key(bs, password) < 0)
 255             error("invalid password");
 256     }
 257     return bs;
 258 }
 259
 260 static int img_create(int argc, char **argv)
 261 {
 262     int c, ret, flags;
 263     const char *fmt = "raw";
 264     const char *filename;
 265     const char *base_filename = NULL;
 266     uint64_t size;
 267     const char *p;
 268     BlockDriver *drv;
 269
 270     flags = 0;
 271     for(;;) {
 272         c = getopt(argc, argv, "b:f:he6");
 273         if (c == -1)
 274             break;
 275         switch(c) {
 276         case 'h':
 277             help();
 278             break;
 279         case 'b':
 280             base_filename = optarg;
 281             break;
 282         case 'f':
 283             fmt = optarg;
 284             break;
 285         case 'e':
 286             flags |= BLOCK_FLAG_ENCRYPT;
 287             break;
 288         case '6':
 289             flags |= BLOCK_FLAG_COMPAT6;
 290             break;
 291         }
 292     }
 293     if (optind >= argc)
 294         help();
 295     filename = argv[optind++];
 296     size = 0;
 297     if (base_filename) {
 298         BlockDriverState *bs;
 299         bs = bdrv_new_open(base_filename, NULL);
 300         bdrv_get_geometry(bs, &size);
 301         size *= 512;
 302         bdrv_delete(bs);
 303     } else {
 304         if (optind >= argc)
 305             help();
 306         p = argv[optind];
 307         size = strtoul(p, (char **)&p, 0);
 308         if (*p == 'M') {
 309             size *= 1024 * 1024;
 310         } else if (*p == 'G') {
 311             size *= 1024 * 1024 * 1024;
 312         } else if (*p == 'k' || *p == 'K' || *p == '\0') {
 313             size *= 1024;
 314         } else {
 315             help();
 316         }
 317     }
 318     drv = bdrv_find_format(fmt);
 319     if (!drv)
 320         error("Unknown file format '%s'", fmt);
 321     printf("Formatting '%s', fmt=%s",
 322            filename, fmt);
 323     if (flags & BLOCK_FLAG_ENCRYPT)
 324         printf(", encrypted");
 325     if (flags & BLOCK_FLAG_COMPAT6)
 326         printf(", compatibility level=6");
 327     if (base_filename) {
 328         printf(", backing_file=%s",
 329                base_filename);
 330     }
 331     printf(", size=%" PRIu64 " kB\n", size / 1024);
 332     ret = bdrv_create(drv, filename, size / 512, base_filename, flags);
 333     if (ret < 0) {
 334         if (ret == -ENOTSUP) {
 335             error("Formatting or formatting option not supported for file format '%s'", fmt);
 336         } else {
 337             error("Error while formatting");
 338         }
 339     }
 340     return 0;
 341 }
 342
 343 static int img_commit(int argc, char **argv)
 344 {
 345     int c, ret;
 346     const char *filename, *fmt;
 347     BlockDriver *drv;
 348     BlockDriverState *bs;
 349
 350     fmt = NULL;
 351     for(;;) {
 352         c = getopt(argc, argv, "f:h");
 353         if (c == -1)
 354             break;
 355         switch(c) {
 356         case 'h':
 357             help();
 358             break;
 359         case 'f':
 360             fmt = optarg;
 361             break;
 362         }
 363     }
 364     if (optind >= argc)
 365         help();
 366     filename = argv[optind++];
 367
 368     bs = bdrv_new("");
 369     if (!bs)
 370         error("Not enough memory");
 371     if (fmt) {
 372         drv = bdrv_find_format(fmt);
 373         if (!drv)
 374             error("Unknown file format '%s'", fmt);
 375     } else {
 376         drv = NULL;
 377     }
 378     if (bdrv_open2(bs, filename, 0, drv) < 0) {
 379         error("Could not open '%s'", filename);
 380     }
 381     ret = bdrv_commit(bs);
 382     switch(ret) {
 383     case 0:
 384         printf("Image committed.\n");
 385         break;
 386     case -ENOENT:
 387         error("No disk inserted");
 388         break;
 389     case -EACCES:
 390         error("Image is read-only");
 391         break;
 392     case -ENOTSUP:
 393         error("Image is already committed");
 394         break;
 395     default:
 396         error("Error while committing image");
 397         break;
 398     }
 399
 400     bdrv_delete(bs);
 401     return 0;
 402 }
 403
 404 static int is_not_zero(const uint8_t *sector, int len)
 405 {
 406     int i;
 407     len >>= 2;
 408     for(i = 0;i < len; i++) {
 409         if (((uint32_t *)sector)[i] != 0)
 410             return 1;
 411     }
 412     return 0;
 413 }
 414
 415 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
 416 {
 417     int v, i;
 418
 419     if (n <= 0) {
 420         *pnum = 0;
 421         return 0;
 422     }
 423     v = is_not_zero(buf, 512);
 424     for(i = 1; i < n; i++) {
 425         buf += 512;
 426         if (v != is_not_zero(buf, 512))
 427             break;
 428     }
 429     *pnum = i;
 430     return v;
 431 }
 432
 433 #define IO_BUF_SIZE 65536
 434
 435 static int img_convert(int argc, char **argv)
 436 {
 437     int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
 438     const char *fmt, *out_fmt, *out_filename;
 439     BlockDriver *drv;
 440     BlockDriverState **bs, *out_bs;
 441     int64_t total_sectors, nb_sectors, sector_num, bs_offset;
 442     uint64_t bs_sectors;
 443     uint8_t buf[IO_BUF_SIZE];
 444     const uint8_t *buf1;
 445     BlockDriverInfo bdi;
 446
 447     fmt = NULL;
 448     out_fmt = "raw";
 449     flags = 0;
 450     for(;;) {
 451         c = getopt(argc, argv, "f:O:hce6");
 452         if (c == -1)
 453             break;
 454         switch(c) {
 455         case 'h':
 456             help();
 457             break;
 458         case 'f':
 459             fmt = optarg;
 460             break;
 461         case 'O':
 462             out_fmt = optarg;
 463             break;
 464         case 'c':
 465             flags |= BLOCK_FLAG_COMPRESS;
 466             break;
 467         case 'e':
 468             flags |= BLOCK_FLAG_ENCRYPT;
 469             break;
 470         case '6':
 471             flags |= BLOCK_FLAG_COMPAT6;
 472             break;
 473         }
 474     }
 475
 476     bs_n = argc - optind - 1;
 477     if (bs_n < 1) help();
 478
 479     out_filename = argv[argc - 1];
 480
 481     bs = calloc(bs_n, sizeof(BlockDriverState *));
 482     if (!bs)
 483         error("Out of memory");
 484
 485     total_sectors = 0;
 486     for (bs_i = 0; bs_i < bs_n; bs_i++) {
 487         bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt);
 488         if (!bs[bs_i])
 489             error("Could not open '%s'", argv[optind + bs_i]);
 490         bdrv_get_geometry(bs[bs_i], &bs_sectors);
 491         total_sectors += bs_sectors;
 492     }
 493
 494     drv = bdrv_find_format(out_fmt);
 495     if (!drv)
 496         error("Unknown file format '%s'", out_fmt);
 497     if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_qcow && drv != &bdrv_qcow2)
 498         error("Compression not supported for this file format");
 499     if (flags & BLOCK_FLAG_ENCRYPT && drv != &bdrv_qcow && drv != &bdrv_qcow2)
 500         error("Encryption not supported for this file format");
 501     if (flags & BLOCK_FLAG_COMPAT6 && drv != &bdrv_vmdk)
 502         error("Alternative compatibility level not supported for this file format");
 503     if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
 504         error("Compression and encryption not supported at the same time");
 505
 506     ret = bdrv_create(drv, out_filename, total_sectors, NULL, flags);
 507     if (ret < 0) {
 508         if (ret == -ENOTSUP) {
 509             error("Formatting not supported for file format '%s'", fmt);
 510         } else {
 511             error("Error while formatting '%s'", out_filename);
 512         }
 513     }
 514
 515     out_bs = bdrv_new_open(out_filename, out_fmt);
 516
 517     bs_i = 0;
 518     bs_offset = 0;
 519     bdrv_get_geometry(bs[0], &bs_sectors);
 520
 521     if (flags & BLOCK_FLAG_COMPRESS) {
 522         if (bdrv_get_info(out_bs, &bdi) < 0)
 523             error("could not get block driver info");
 524         cluster_size = bdi.cluster_size;
 525         if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE)
 526             error("invalid cluster size");
 527         cluster_sectors = cluster_size >> 9;
 528         sector_num = 0;
 529         for(;;) {
 530             int64_t bs_num;
 531             int remainder;
 532             uint8_t *buf2;
 533
 534             nb_sectors = total_sectors - sector_num;
 535             if (nb_sectors <= 0)
 536                 break;
 537             if (nb_sectors >= cluster_sectors)
 538                 n = cluster_sectors;
 539             else
 540                 n = nb_sectors;
 541
 542             bs_num = sector_num - bs_offset;
 543             assert (bs_num >= 0);
 544             remainder = n;
 545             buf2 = buf;
 546             while (remainder > 0) {
 547                 int nlow;
 548                 while (bs_num == bs_sectors) {
 549                     bs_i++;
 550                     assert (bs_i < bs_n);
 551                     bs_offset += bs_sectors;
 552                     bdrv_get_geometry(bs[bs_i], &bs_sectors);
 553                     bs_num = 0;
 554                     /* printf("changing part: sector_num=%lld, "
 555                        "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
 556                        sector_num, bs_i, bs_offset, bs_sectors); */
 557                 }
 558                 assert (bs_num < bs_sectors);
 559
 560                 nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;
 561
 562                 if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0)
 563                     error("error while reading");
 564
 565                 buf2 += nlow * 512;
 566                 bs_num += nlow;
 567
 568                 remainder -= nlow;
 569             }
 570             assert (remainder == 0);
 571
 572             if (n < cluster_sectors)
 573                 memset(buf + n * 512, 0, cluster_size - n * 512);
 574             if (is_not_zero(buf, cluster_size)) {
 575                 if (bdrv_write_compressed(out_bs, sector_num, buf,
 576                                           cluster_sectors) != 0)
 577                     error("error while compressing sector %" PRId64,
 578                           sector_num);
 579             }
 580             sector_num += n;
 581         }
 582         /* signal EOF to align */
 583         bdrv_write_compressed(out_bs, 0, NULL, 0);
 584     } else {
 585         sector_num = 0;
 586         for(;;) {
 587             nb_sectors = total_sectors - sector_num;
 588             if (nb_sectors <= 0)
 589                 break;
 590             if (nb_sectors >= (IO_BUF_SIZE / 512))
 591                 n = (IO_BUF_SIZE / 512);
 592             else
 593                 n = nb_sectors;
 594
 595             while (sector_num - bs_offset >= bs_sectors) {
 596                 bs_i ++;
 597                 assert (bs_i < bs_n);
 598                 bs_offset += bs_sectors;
 599                 bdrv_get_geometry(bs[bs_i], &bs_sectors);
 600                 /* printf("changing part: sector_num=%lld, bs_i=%d, "
 601                   "bs_offset=%lld, bs_sectors=%lld\n",
 602                    sector_num, bs_i, bs_offset, bs_sectors); */
 603             }
 604
 605             if (n > bs_offset + bs_sectors - sector_num)
 606                 n = bs_offset + bs_sectors - sector_num;
 607
 608             if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0)
 609                 error("error while reading");
 610             /* NOTE: at the same time we convert, we do not write zero
 611                sectors to have a chance to compress the image. Ideally, we
 612                should add a specific call to have the info to go faster */
 613             buf1 = buf;
 614             while (n > 0) {
 615                 if (is_allocated_sectors(buf1, n, &n1)) {
 616                     if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
 617                         error("error while writing");
 618                 }
 619                 sector_num += n1;
 620                 n -= n1;
 621                 buf1 += n1 * 512;
 622             }
 623         }
 624     }
 625     bdrv_delete(out_bs);
 626     for (bs_i = 0; bs_i < bs_n; bs_i++)
 627         bdrv_delete(bs[bs_i]);
 628     free(bs);
 629     return 0;
 630 }
 631
 632 #ifdef _WIN32
 633 static int64_t get_allocated_file_size(const char *filename)
 634 {
 635     typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high);
 636     get_compressed_t get_compressed;
 637     struct _stati64 st;
 638
 639     /* WinNT support GetCompressedFileSize to determine allocate size */
 640     get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
 641     if (get_compressed) {
 642         DWORD high, low;
 643         low = get_compressed(filename, &high);
 644         if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR)
 645             return (((int64_t) high) << 32) + low;
 646     }
 647
 648     if (_stati64(filename, &st) < 0)
 649         return -1;
 650     return st.st_size;
 651 }
 652 #else
 653 static int64_t get_allocated_file_size(const char *filename)
 654 {
 655     struct stat st;
 656     if (stat(filename, &st) < 0)
 657         return -1;
 658     return (int64_t)st.st_blocks * 512;
 659 }
 660 #endif
 661
 662 static void dump_snapshots(BlockDriverState *bs)
 663 {
 664     QEMUSnapshotInfo *sn_tab, *sn;
 665     int nb_sns, i;
 666     char buf[256];
 667
 668     nb_sns = bdrv_snapshot_list(bs, &sn_tab);
 669     if (nb_sns <= 0)
 670         return;
 671     printf("Snapshot list:\n");
 672     printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
 673     for(i = 0; i < nb_sns; i++) {
 674         sn = &sn_tab[i];
 675         printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
 676     }
 677     qemu_free(sn_tab);
 678 }
 679
 680 static int img_info(int argc, char **argv)
 681 {
 682     int c;
 683     const char *filename, *fmt;
 684     BlockDriver *drv;
 685     BlockDriverState *bs;
 686     char fmt_name[128], size_buf[128], dsize_buf[128];
 687     uint64_t total_sectors;
 688     int64_t allocated_size;
 689     char backing_filename[1024];
 690     char backing_filename2[1024];
 691     BlockDriverInfo bdi;
 692
 693     fmt = NULL;
 694     for(;;) {
 695         c = getopt(argc, argv, "f:h");
 696         if (c == -1)
 697             break;
 698         switch(c) {
 699         case 'h':
 700             help();
 701             break;
 702         case 'f':
 703             fmt = optarg;
 704             break;
 705         }
 706     }
 707     if (optind >= argc)
 708         help();
 709     filename = argv[optind++];
 710
 711     bs = bdrv_new("");
 712     if (!bs)
 713         error("Not enough memory");
 714     if (fmt) {
 715         drv = bdrv_find_format(fmt);
 716         if (!drv)
 717             error("Unknown file format '%s'", fmt);
 718     } else {
 719         drv = NULL;
 720     }
 721     if (bdrv_open2(bs, filename, 0, drv) < 0) {
 722         error("Could not open '%s'", filename);
 723     }
 724     bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
 725     bdrv_get_geometry(bs, &total_sectors);
 726     get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
 727     allocated_size = get_allocated_file_size(filename);
 728     if (allocated_size < 0)
 729         sprintf(dsize_buf, "unavailable");
 730     else
 731         get_human_readable_size(dsize_buf, sizeof(dsize_buf),
 732                                 allocated_size);
 733     printf("image: %s\n"
 734            "file format: %s\n"
 735            "virtual size: %s (%" PRId64 " bytes)\n"
 736            "disk size: %s\n",
 737            filename, fmt_name, size_buf,
 738            (total_sectors * 512),
 739            dsize_buf);
 740     if (bdrv_is_encrypted(bs))
 741         printf("encrypted: yes\n");
 742     if (bdrv_get_info(bs, &bdi) >= 0) {
 743         if (bdi.cluster_size != 0)
 744             printf("cluster_size: %d\n", bdi.cluster_size);
 745     }
 746     bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
 747     if (backing_filename[0] != '\0') {
 748         path_combine(backing_filename2, sizeof(backing_filename2),
 749                      filename, backing_filename);
 750         printf("backing file: %s (actual path: %s)\n",
 751                backing_filename,
 752                backing_filename2);
 753     }
 754     dump_snapshots(bs);
 755     bdrv_delete(bs);
 756     return 0;
 757 }
 758
 759 int main(int argc, char **argv)
 760 {
 761     const char *cmd;
 762
 763     bdrv_init();
 764     if (argc < 2)
 765         help();
 766     cmd = argv[1];
 767     optind++;
 768     if (!strcmp(cmd, "create")) {
 769         img_create(argc, argv);
 770     } else if (!strcmp(cmd, "commit")) {
 771         img_commit(argc, argv);
 772     } else if (!strcmp(cmd, "convert")) {
 773         img_convert(argc, argv);
 774     } else if (!strcmp(cmd, "info")) {
 775         img_info(argc, argv);
 776     } else {
 777         help();
 778     }
 779     return 0;
 780 }