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1
/*
2
 * QEMU disk image utility
3
 *
4
 * Copyright (c) 2003-2007 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:
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 *
13
 * The above copyright notice and this permission notice shall be included in
14
 * all copies or substantial portions of the Software.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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 * 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,
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 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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 * THE SOFTWARE.
23
 */
24
#include "qemu-common.h"
25
#include "block_int.h"
26
#include <assert.h>
27

    
28
#ifdef _WIN32
29
#include <windows.h>
30
#endif
31

    
32
void *get_mmap_addr(unsigned long size)
33
{
34
    return NULL;
35
}
36

    
37
void qemu_free(void *ptr)
38
{
39
    free(ptr);
40
}
41

    
42
void *qemu_malloc(size_t size)
43
{
44
    return malloc(size);
45
}
46

    
47
void *qemu_mallocz(size_t size)
48
{
49
    void *ptr;
50
    ptr = qemu_malloc(size);
51
    if (!ptr)
52
        return NULL;
53
    memset(ptr, 0, size);
54
    return ptr;
55
}
56

    
57
char *qemu_strdup(const char *str)
58
{
59
    char *ptr;
60
    ptr = qemu_malloc(strlen(str) + 1);
61
    if (!ptr)
62
        return NULL;
63
    strcpy(ptr, str);
64
    return ptr;
65
}
66

    
67
static void __attribute__((noreturn)) error(const char *fmt, ...)
68
{
69
    va_list ap;
70
    va_start(ap, fmt);
71
    fprintf(stderr, "qemu-img: ");
72
    vfprintf(stderr, fmt, ap);
73
    fprintf(stderr, "\n");
74
    exit(1);
75
    va_end(ap);
76
}
77

    
78
static void format_print(void *opaque, const char *name)
79
{
80
    printf(" %s", name);
81
}
82

    
83
static void help(void)
84
{
85
    printf("qemu-img version " QEMU_VERSION ", Copyright (c) 2004-2007 Fabrice Bellard\n"
86
           "usage: qemu-img command [command options]\n"
87
           "QEMU disk image utility\n"
88
           "\n"
89
           "Command syntax:\n"
90
           "  create [-e] [-6] [-b base_image] [-f fmt] filename [size]\n"
91
           "  commit [-f fmt] filename\n"
92
           "  convert [-c] [-e] [-6] [-f fmt] filename [filename2 [...]] [-O output_fmt] output_filename\n"
93
           "  info [-f fmt] filename\n"
94
           "\n"
95
           "Command parameters:\n"
96
           "  'filename' is a disk image filename\n"
97
           "  'base_image' is the read-only disk image which is used as base for a copy on\n"
98
           "    write image; the copy on write image only stores the modified data\n"
99
           "  'fmt' is the disk image format. It is guessed automatically in most cases\n"
100
           "  'size' is the disk image size in kilobytes. Optional suffixes 'M' (megabyte)\n"
101
           "    and 'G' (gigabyte) are supported\n"
102
           "  'output_filename' is the destination disk image filename\n"
103
           "  'output_fmt' is the destination format\n"
104
           "  '-c' indicates that target image must be compressed (qcow format only)\n"
105
           "  '-e' indicates that the target image must be encrypted (qcow format only)\n"
106
           "  '-6' indicates that the target image must use compatibility level 6 (vmdk format only)\n"
107
           );
108
    printf("\nSupported format:");
109
    bdrv_iterate_format(format_print, NULL);
110
    printf("\n");
111
    exit(1);
112
}
113

    
114
#if defined(WIN32)
115
/* XXX: put correct support for win32 */
116
static int read_password(char *buf, int buf_size)
117
{
118
    int c, i;
119
    printf("Password: ");
120
    fflush(stdout);
121
    i = 0;
122
    for(;;) {
123
        c = getchar();
124
        if (c == '\n')
125
            break;
126
        if (i < (buf_size - 1))
127
            buf[i++] = c;
128
    }
129
    buf[i] = '\0';
130
    return 0;
131
}
132

    
133
#else
134

    
135
#include <termios.h>
136

    
137
static struct termios oldtty;
138

    
139
static void term_exit(void)
140
{
141
    tcsetattr (0, TCSANOW, &oldtty);
142
}
143

    
144
static void term_init(void)
145
{
146
    struct termios tty;
147

    
148
    tcgetattr (0, &tty);
149
    oldtty = tty;
150

    
151
    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
152
                          |INLCR|IGNCR|ICRNL|IXON);
153
    tty.c_oflag |= OPOST;
154
    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
155
    tty.c_cflag &= ~(CSIZE|PARENB);
156
    tty.c_cflag |= CS8;
157
    tty.c_cc[VMIN] = 1;
158
    tty.c_cc[VTIME] = 0;
159

    
160
    tcsetattr (0, TCSANOW, &tty);
161

    
162
    atexit(term_exit);
163
}
164

    
165
static int read_password(char *buf, int buf_size)
166
{
167
    uint8_t ch;
168
    int i, ret;
169

    
170
    printf("password: ");
171
    fflush(stdout);
172
    term_init();
173
    i = 0;
174
    for(;;) {
175
        ret = read(0, &ch, 1);
176
        if (ret == -1) {
177
            if (errno == EAGAIN || errno == EINTR) {
178
                continue;
179
            } else {
180
                ret = -1;
181
                break;
182
            }
183
        } else if (ret == 0) {
184
            ret = -1;
185
            break;
186
        } else {
187
            if (ch == '\r') {
188
                ret = 0;
189
                break;
190
            }
191
            if (i < (buf_size - 1))
192
                buf[i++] = ch;
193
        }
194
    }
195
    term_exit();
196
    buf[i] = '\0';
197
    printf("\n");
198
    return ret;
199
}
200
#endif
201

    
202
static BlockDriverState *bdrv_new_open(const char *filename,
203
                                       const char *fmt)
204
{
205
    BlockDriverState *bs;
206
    BlockDriver *drv;
207
    char password[256];
208

    
209
    bs = bdrv_new("");
210
    if (!bs)
211
        error("Not enough memory");
212
    if (fmt) {
213
        drv = bdrv_find_format(fmt);
214
        if (!drv)
215
            error("Unknown file format '%s'", fmt);
216
    } else {
217
        drv = NULL;
218
    }
219
    if (bdrv_open2(bs, filename, 0, drv) < 0) {
220
        error("Could not open '%s'", filename);
221
    }
222
    if (bdrv_is_encrypted(bs)) {
223
        printf("Disk image '%s' is encrypted.\n", filename);
224
        if (read_password(password, sizeof(password)) < 0)
225
            error("No password given");
226
        if (bdrv_set_key(bs, password) < 0)
227
            error("invalid password");
228
    }
229
    return bs;
230
}
231

    
232
static int img_create(int argc, char **argv)
233
{
234
    int c, ret, flags;
235
    const char *fmt = "raw";
236
    const char *filename;
237
    const char *base_filename = NULL;
238
    int64_t size;
239
    const char *p;
240
    BlockDriver *drv;
241

    
242
    flags = 0;
243
    for(;;) {
244
        c = getopt(argc, argv, "b:f:he6");
245
        if (c == -1)
246
            break;
247
        switch(c) {
248
        case 'h':
249
            help();
250
            break;
251
        case 'b':
252
            base_filename = optarg;
253
            break;
254
        case 'f':
255
            fmt = optarg;
256
            break;
257
        case 'e':
258
            flags |= BLOCK_FLAG_ENCRYPT;
259
            break;
260
        case '6':
261
            flags |= BLOCK_FLAG_COMPAT6;
262
            break;
263
        }
264
    }
265
    if (optind >= argc)
266
        help();
267
    filename = argv[optind++];
268
    size = 0;
269
    if (base_filename) {
270
        BlockDriverState *bs;
271
        bs = bdrv_new_open(base_filename, NULL);
272
        bdrv_get_geometry(bs, &size);
273
        size *= 512;
274
        bdrv_delete(bs);
275
    } else {
276
        if (optind >= argc)
277
            help();
278
        p = argv[optind];
279
        size = strtoul(p, (char **)&p, 0);
280
        if (*p == 'M') {
281
            size *= 1024 * 1024;
282
        } else if (*p == 'G') {
283
            size *= 1024 * 1024 * 1024;
284
        } else if (*p == 'k' || *p == 'K' || *p == '\0') {
285
            size *= 1024;
286
        } else {
287
            help();
288
        }
289
    }
290
    drv = bdrv_find_format(fmt);
291
    if (!drv)
292
        error("Unknown file format '%s'", fmt);
293
    printf("Formatting '%s', fmt=%s",
294
           filename, fmt);
295
    if (flags & BLOCK_FLAG_ENCRYPT)
296
        printf(", encrypted");
297
    if (flags & BLOCK_FLAG_COMPAT6)
298
        printf(", compatibility level=6");
299
    if (base_filename) {
300
        printf(", backing_file=%s",
301
               base_filename);
302
    }
303
    printf(", size=%" PRId64 " kB\n", (int64_t) (size / 1024));
304
    ret = bdrv_create(drv, filename, size / 512, base_filename, flags);
305
    if (ret < 0) {
306
        if (ret == -ENOTSUP) {
307
            error("Formatting or formatting option not supported for file format '%s'", fmt);
308
        } else {
309
            error("Error while formatting");
310
        }
311
    }
312
    return 0;
313
}
314

    
315
static int img_commit(int argc, char **argv)
316
{
317
    int c, ret;
318
    const char *filename, *fmt;
319
    BlockDriver *drv;
320
    BlockDriverState *bs;
321

    
322
    fmt = NULL;
323
    for(;;) {
324
        c = getopt(argc, argv, "f:h");
325
        if (c == -1)
326
            break;
327
        switch(c) {
328
        case 'h':
329
            help();
330
            break;
331
        case 'f':
332
            fmt = optarg;
333
            break;
334
        }
335
    }
336
    if (optind >= argc)
337
        help();
338
    filename = argv[optind++];
339

    
340
    bs = bdrv_new("");
341
    if (!bs)
342
        error("Not enough memory");
343
    if (fmt) {
344
        drv = bdrv_find_format(fmt);
345
        if (!drv)
346
            error("Unknown file format '%s'", fmt);
347
    } else {
348
        drv = NULL;
349
    }
350
    if (bdrv_open2(bs, filename, 0, drv) < 0) {
351
        error("Could not open '%s'", filename);
352
    }
353
    ret = bdrv_commit(bs);
354
    switch(ret) {
355
    case 0:
356
        printf("Image committed.\n");
357
        break;
358
    case -ENOENT:
359
        error("No disk inserted");
360
        break;
361
    case -EACCES:
362
        error("Image is read-only");
363
        break;
364
    case -ENOTSUP:
365
        error("Image is already committed");
366
        break;
367
    default:
368
        error("Error while committing image");
369
        break;
370
    }
371

    
372
    bdrv_delete(bs);
373
    return 0;
374
}
375

    
376
static int is_not_zero(const uint8_t *sector, int len)
377
{
378
    int i;
379
    len >>= 2;
380
    for(i = 0;i < len; i++) {
381
        if (((uint32_t *)sector)[i] != 0)
382
            return 1;
383
    }
384
    return 0;
385
}
386

    
387
static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum)
388
{
389
    int v, i;
390

    
391
    if (n <= 0) {
392
        *pnum = 0;
393
        return 0;
394
    }
395
    v = is_not_zero(buf, 512);
396
    for(i = 1; i < n; i++) {
397
        buf += 512;
398
        if (v != is_not_zero(buf, 512))
399
            break;
400
    }
401
    *pnum = i;
402
    return v;
403
}
404

    
405
#define IO_BUF_SIZE 65536
406

    
407
static int img_convert(int argc, char **argv)
408
{
409
    int c, ret, n, n1, bs_n, bs_i, flags, cluster_size, cluster_sectors;
410
    const char *fmt, *out_fmt, *out_filename;
411
    BlockDriver *drv;
412
    BlockDriverState **bs, *out_bs;
413
    int64_t total_sectors, nb_sectors, sector_num, bs_offset, bs_sectors;
414
    uint8_t buf[IO_BUF_SIZE];
415
    const uint8_t *buf1;
416
    BlockDriverInfo bdi;
417

    
418
    fmt = NULL;
419
    out_fmt = "raw";
420
    flags = 0;
421
    for(;;) {
422
        c = getopt(argc, argv, "f:O:hce6");
423
        if (c == -1)
424
            break;
425
        switch(c) {
426
        case 'h':
427
            help();
428
            break;
429
        case 'f':
430
            fmt = optarg;
431
            break;
432
        case 'O':
433
            out_fmt = optarg;
434
            break;
435
        case 'c':
436
            flags |= BLOCK_FLAG_COMPRESS;
437
            break;
438
        case 'e':
439
            flags |= BLOCK_FLAG_ENCRYPT;
440
            break;
441
        case '6':
442
            flags |= BLOCK_FLAG_COMPAT6;
443
            break;
444
        }
445
    }
446

    
447
    bs_n = argc - optind - 1;
448
    if (bs_n < 1) help();
449

    
450
    out_filename = argv[argc - 1];
451
        
452
    bs = calloc(bs_n, sizeof(BlockDriverState *));
453
    if (!bs)
454
        error("Out of memory");
455

    
456
    total_sectors = 0;
457
    for (bs_i = 0; bs_i < bs_n; bs_i++) {
458
        bs[bs_i] = bdrv_new_open(argv[optind + bs_i], fmt);
459
        if (!bs[bs_i])
460
            error("Could not open '%s'", argv[optind + bs_i]);
461
        bdrv_get_geometry(bs[bs_i], &bs_sectors);
462
        total_sectors += bs_sectors;
463
    }
464

    
465
    drv = bdrv_find_format(out_fmt);
466
    if (!drv)
467
        error("Unknown file format '%s'", out_fmt);
468
    if (flags & BLOCK_FLAG_COMPRESS && drv != &bdrv_qcow && drv != &bdrv_qcow2)
469
        error("Compression not supported for this file format");
470
    if (flags & BLOCK_FLAG_ENCRYPT && drv != &bdrv_qcow && drv != &bdrv_qcow2)
471
        error("Encryption not supported for this file format");
472
    if (flags & BLOCK_FLAG_COMPAT6 && drv != &bdrv_vmdk)
473
        error("Alternative compatibility level not supported for this file format");
474
    if (flags & BLOCK_FLAG_ENCRYPT && flags & BLOCK_FLAG_COMPRESS)
475
        error("Compression and encryption not supported at the same time");
476

    
477
    ret = bdrv_create(drv, out_filename, total_sectors, NULL, flags);
478
    if (ret < 0) {
479
        if (ret == -ENOTSUP) {
480
            error("Formatting not supported for file format '%s'", fmt);
481
        } else {
482
            error("Error while formatting '%s'", out_filename);
483
        }
484
    }
485

    
486
    out_bs = bdrv_new_open(out_filename, out_fmt);
487

    
488
    bs_i = 0;
489
    bs_offset = 0;
490
    bdrv_get_geometry(bs[0], &bs_sectors);
491

    
492
    if (flags & BLOCK_FLAG_COMPRESS) {
493
        if (bdrv_get_info(out_bs, &bdi) < 0)
494
            error("could not get block driver info");
495
        cluster_size = bdi.cluster_size;
496
        if (cluster_size <= 0 || cluster_size > IO_BUF_SIZE)
497
            error("invalid cluster size");
498
        cluster_sectors = cluster_size >> 9;
499
        sector_num = 0;
500
        for(;;) {
501
            int64_t bs_num;
502
            int remainder;
503
            uint8_t *buf2;
504

    
505
            nb_sectors = total_sectors - sector_num;
506
            if (nb_sectors <= 0)
507
                break;
508
            if (nb_sectors >= cluster_sectors)
509
                n = cluster_sectors;
510
            else
511
                n = nb_sectors;
512

    
513
            bs_num = sector_num - bs_offset;
514
            assert (bs_num >= 0);
515
            remainder = n;
516
            buf2 = buf;
517
            while (remainder > 0) {
518
                int nlow;
519
                while (bs_num == bs_sectors) {
520
                    bs_i++;
521
                    assert (bs_i < bs_n);
522
                    bs_offset += bs_sectors;
523
                    bdrv_get_geometry(bs[bs_i], &bs_sectors);
524
                    bs_num = 0;
525
                    /* printf("changing part: sector_num=%lld, "
526
                       "bs_i=%d, bs_offset=%lld, bs_sectors=%lld\n",
527
                       sector_num, bs_i, bs_offset, bs_sectors); */
528
                }
529
                assert (bs_num < bs_sectors);
530

    
531
                nlow = (remainder > bs_sectors - bs_num) ? bs_sectors - bs_num : remainder;
532

    
533
                if (bdrv_read(bs[bs_i], bs_num, buf2, nlow) < 0) 
534
                    error("error while reading");
535

    
536
                buf2 += nlow * 512;
537
                bs_num += nlow;
538

    
539
                remainder -= nlow;
540
            }
541
            assert (remainder == 0);
542

    
543
            if (n < cluster_sectors)
544
                memset(buf + n * 512, 0, cluster_size - n * 512);
545
            if (is_not_zero(buf, cluster_size)) {
546
                if (bdrv_write_compressed(out_bs, sector_num, buf,
547
                                          cluster_sectors) != 0)
548
                    error("error while compressing sector %" PRId64,
549
                          sector_num);
550
            }
551
            sector_num += n;
552
        }
553
        /* signal EOF to align */
554
        bdrv_write_compressed(out_bs, 0, NULL, 0);
555
    } else {
556
        sector_num = 0;
557
        for(;;) {
558
            nb_sectors = total_sectors - sector_num;
559
            if (nb_sectors <= 0)
560
                break;
561
            if (nb_sectors >= (IO_BUF_SIZE / 512))
562
                n = (IO_BUF_SIZE / 512);
563
            else
564
                n = nb_sectors;
565

    
566
            while (sector_num - bs_offset >= bs_sectors) {
567
                bs_i ++;
568
                assert (bs_i < bs_n);
569
                bs_offset += bs_sectors;
570
                bdrv_get_geometry(bs[bs_i], &bs_sectors);
571
                /* printf("changing part: sector_num=%lld, bs_i=%d, "
572
                  "bs_offset=%lld, bs_sectors=%lld\n",
573
                   sector_num, bs_i, bs_offset, bs_sectors); */
574
            }
575

    
576
            if (n > bs_offset + bs_sectors - sector_num)
577
                n = bs_offset + bs_sectors - sector_num;
578

    
579
            if (bdrv_read(bs[bs_i], sector_num - bs_offset, buf, n) < 0) 
580
                error("error while reading");
581
            /* NOTE: at the same time we convert, we do not write zero
582
               sectors to have a chance to compress the image. Ideally, we
583
               should add a specific call to have the info to go faster */
584
            buf1 = buf;
585
            while (n > 0) {
586
                if (is_allocated_sectors(buf1, n, &n1)) {
587
                    if (bdrv_write(out_bs, sector_num, buf1, n1) < 0)
588
                        error("error while writing");
589
                }
590
                sector_num += n1;
591
                n -= n1;
592
                buf1 += n1 * 512;
593
            }
594
        }
595
    }
596
    bdrv_delete(out_bs);
597
    for (bs_i = 0; bs_i < bs_n; bs_i++)
598
        bdrv_delete(bs[bs_i]);
599
    free(bs);
600
    return 0;
601
}
602

    
603
#ifdef _WIN32
604
static int64_t get_allocated_file_size(const char *filename)
605
{
606
    typedef DWORD (WINAPI * get_compressed_t)(const char *filename, DWORD *high);
607
    get_compressed_t get_compressed;
608
    struct _stati64 st;
609

    
610
    /* WinNT support GetCompressedFileSize to determine allocate size */
611
    get_compressed = (get_compressed_t) GetProcAddress(GetModuleHandle("kernel32"), "GetCompressedFileSizeA");
612
    if (get_compressed) {
613
            DWORD high, low;
614
            low = get_compressed(filename, &high);
615
            if (low != 0xFFFFFFFFlu || GetLastError() == NO_ERROR)
616
            return (((int64_t) high) << 32) + low;
617
    }
618

    
619
    if (_stati64(filename, &st) < 0)
620
        return -1;
621
    return st.st_size;
622
}
623
#else
624
static int64_t get_allocated_file_size(const char *filename)
625
{
626
    struct stat st;
627
    if (stat(filename, &st) < 0)
628
        return -1;
629
    return (int64_t)st.st_blocks * 512;
630
}
631
#endif
632

    
633
static void dump_snapshots(BlockDriverState *bs)
634
{
635
    QEMUSnapshotInfo *sn_tab, *sn;
636
    int nb_sns, i;
637
    char buf[256];
638

    
639
    nb_sns = bdrv_snapshot_list(bs, &sn_tab);
640
    if (nb_sns <= 0)
641
        return;
642
    printf("Snapshot list:\n");
643
    printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), NULL));
644
    for(i = 0; i < nb_sns; i++) {
645
        sn = &sn_tab[i];
646
        printf("%s\n", bdrv_snapshot_dump(buf, sizeof(buf), sn));
647
    }
648
    qemu_free(sn_tab);
649
}
650

    
651
static int img_info(int argc, char **argv)
652
{
653
    int c;
654
    const char *filename, *fmt;
655
    BlockDriver *drv;
656
    BlockDriverState *bs;
657
    char fmt_name[128], size_buf[128], dsize_buf[128];
658
    int64_t total_sectors, allocated_size;
659
    char backing_filename[1024];
660
    char backing_filename2[1024];
661
    BlockDriverInfo bdi;
662

    
663
    fmt = NULL;
664
    for(;;) {
665
        c = getopt(argc, argv, "f:h");
666
        if (c == -1)
667
            break;
668
        switch(c) {
669
        case 'h':
670
            help();
671
            break;
672
        case 'f':
673
            fmt = optarg;
674
            break;
675
        }
676
    }
677
    if (optind >= argc)
678
        help();
679
    filename = argv[optind++];
680

    
681
    bs = bdrv_new("");
682
    if (!bs)
683
        error("Not enough memory");
684
    if (fmt) {
685
        drv = bdrv_find_format(fmt);
686
        if (!drv)
687
            error("Unknown file format '%s'", fmt);
688
    } else {
689
        drv = NULL;
690
    }
691
    if (bdrv_open2(bs, filename, 0, drv) < 0) {
692
        error("Could not open '%s'", filename);
693
    }
694
    bdrv_get_format(bs, fmt_name, sizeof(fmt_name));
695
    bdrv_get_geometry(bs, &total_sectors);
696
    get_human_readable_size(size_buf, sizeof(size_buf), total_sectors * 512);
697
    allocated_size = get_allocated_file_size(filename);
698
    if (allocated_size < 0)
699
        sprintf(dsize_buf, "unavailable");
700
    else
701
        get_human_readable_size(dsize_buf, sizeof(dsize_buf),
702
                                allocated_size);
703
    printf("image: %s\n"
704
           "file format: %s\n"
705
           "virtual size: %s (%" PRId64 " bytes)\n"
706
           "disk size: %s\n",
707
           filename, fmt_name, size_buf,
708
           (total_sectors * 512),
709
           dsize_buf);
710
    if (bdrv_is_encrypted(bs))
711
        printf("encrypted: yes\n");
712
    if (bdrv_get_info(bs, &bdi) >= 0) {
713
        if (bdi.cluster_size != 0)
714
            printf("cluster_size: %d\n", bdi.cluster_size);
715
    }
716
    bdrv_get_backing_filename(bs, backing_filename, sizeof(backing_filename));
717
    if (backing_filename[0] != '\0') {
718
        path_combine(backing_filename2, sizeof(backing_filename2),
719
                     filename, backing_filename);
720
        printf("backing file: %s (actual path: %s)\n",
721
               backing_filename,
722
               backing_filename2);
723
    }
724
    dump_snapshots(bs);
725
    bdrv_delete(bs);
726
    return 0;
727
}
728

    
729
int main(int argc, char **argv)
730
{
731
    const char *cmd;
732

    
733
    bdrv_init();
734
    if (argc < 2)
735
        help();
736
    cmd = argv[1];
737
    optind++;
738
    if (!strcmp(cmd, "create")) {
739
        img_create(argc, argv);
740
    } else if (!strcmp(cmd, "commit")) {
741
        img_commit(argc, argv);
742
    } else if (!strcmp(cmd, "convert")) {
743
        img_convert(argc, argv);
744
    } else if (!strcmp(cmd, "info")) {
745
        img_info(argc, argv);
746
    } else {
747
        help();
748
    }
749
    return 0;
750
}