2 * Block driver for the VMDK format
4 * Copyright (c) 2004 Fabrice Bellard
5 * Copyright (c) 2005 Filip Navara
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
26 #include "qemu-common.h"
27 #include "block/block_int.h"
28 #include "qemu/module.h"
29 #include "migration/migration.h"
32 #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
33 #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
34 #define VMDK4_COMPRESSION_DEFLATE 1
35 #define VMDK4_FLAG_NL_DETECT (1 << 0)
36 #define VMDK4_FLAG_RGD (1 << 1)
37 /* Zeroed-grain enable bit */
38 #define VMDK4_FLAG_ZERO_GRAIN (1 << 2)
39 #define VMDK4_FLAG_COMPRESS (1 << 16)
40 #define VMDK4_FLAG_MARKER (1 << 17)
41 #define VMDK4_GD_AT_END 0xffffffffffffffffULL
43 #define VMDK_GTE_ZEROED 0x1
45 /* VMDK internal error codes */
47 #define VMDK_ERROR (-1)
48 /* Cluster not allocated */
49 #define VMDK_UNALLOC (-2)
50 #define VMDK_ZEROED (-3)
52 #define BLOCK_OPT_ZEROED_GRAIN "zeroed_grain"
57 uint32_t disk_sectors
;
59 uint32_t l1dir_offset
;
61 uint32_t file_sectors
;
64 uint32_t sectors_per_track
;
74 int32_t num_gtes_per_gte
;
80 uint16_t compressAlgorithm
;
81 } QEMU_PACKED VMDK4Header
;
83 #define L2_CACHE_SIZE 16
85 typedef struct VmdkExtent
{
86 BlockDriverState
*file
;
94 int64_t flat_start_offset
;
95 int64_t l1_table_offset
;
96 int64_t l1_backup_table_offset
;
98 uint32_t *l1_backup_table
;
100 uint32_t l1_entry_sectors
;
102 unsigned int l2_size
;
104 uint32_t l2_cache_offsets
[L2_CACHE_SIZE
];
105 uint32_t l2_cache_counts
[L2_CACHE_SIZE
];
107 unsigned int cluster_sectors
;
110 typedef struct BDRVVmdkState
{
116 /* Extent array with num_extents entries, ascend ordered by address */
118 Error
*migration_blocker
;
121 typedef struct VmdkMetaData
{
123 unsigned int l1_index
;
124 unsigned int l2_index
;
125 unsigned int l2_offset
;
129 typedef struct VmdkGrainMarker
{
136 MARKER_END_OF_STREAM
= 0,
137 MARKER_GRAIN_TABLE
= 1,
138 MARKER_GRAIN_DIRECTORY
= 2,
142 static int vmdk_probe(const uint8_t *buf
, int buf_size
, const char *filename
)
149 magic
= be32_to_cpu(*(uint32_t *)buf
);
150 if (magic
== VMDK3_MAGIC
||
151 magic
== VMDK4_MAGIC
) {
154 const char *p
= (const char *)buf
;
155 const char *end
= p
+ buf_size
;
158 /* skip comment line */
159 while (p
< end
&& *p
!= '\n') {
166 while (p
< end
&& *p
== ' ') {
169 /* skip '\r' if windows line endings used. */
170 if (p
< end
&& *p
== '\r') {
173 /* only accept blank lines before 'version=' line */
174 if (p
== end
|| *p
!= '\n') {
180 if (end
- p
>= strlen("version=X\n")) {
181 if (strncmp("version=1\n", p
, strlen("version=1\n")) == 0 ||
182 strncmp("version=2\n", p
, strlen("version=2\n")) == 0) {
186 if (end
- p
>= strlen("version=X\r\n")) {
187 if (strncmp("version=1\r\n", p
, strlen("version=1\r\n")) == 0 ||
188 strncmp("version=2\r\n", p
, strlen("version=2\r\n")) == 0) {
200 #define SECTOR_SIZE 512
201 #define DESC_SIZE (20 * SECTOR_SIZE) /* 20 sectors of 512 bytes each */
202 #define BUF_SIZE 4096
203 #define HEADER_SIZE 512 /* first sector of 512 bytes */
205 static void vmdk_free_extents(BlockDriverState
*bs
)
208 BDRVVmdkState
*s
= bs
->opaque
;
211 for (i
= 0; i
< s
->num_extents
; i
++) {
215 g_free(e
->l1_backup_table
);
216 if (e
->file
!= bs
->file
) {
217 bdrv_delete(e
->file
);
223 static void vmdk_free_last_extent(BlockDriverState
*bs
)
225 BDRVVmdkState
*s
= bs
->opaque
;
227 if (s
->num_extents
== 0) {
231 s
->extents
= g_realloc(s
->extents
, s
->num_extents
* sizeof(VmdkExtent
));
234 static uint32_t vmdk_read_cid(BlockDriverState
*bs
, int parent
)
236 char desc
[DESC_SIZE
];
237 uint32_t cid
= 0xffffffff;
238 const char *p_name
, *cid_str
;
240 BDRVVmdkState
*s
= bs
->opaque
;
243 ret
= bdrv_pread(bs
->file
, s
->desc_offset
, desc
, DESC_SIZE
);
249 cid_str
= "parentCID";
250 cid_str_size
= sizeof("parentCID");
253 cid_str_size
= sizeof("CID");
256 desc
[DESC_SIZE
- 1] = '\0';
257 p_name
= strstr(desc
, cid_str
);
258 if (p_name
!= NULL
) {
259 p_name
+= cid_str_size
;
260 sscanf(p_name
, "%x", &cid
);
266 static int vmdk_write_cid(BlockDriverState
*bs
, uint32_t cid
)
268 char desc
[DESC_SIZE
], tmp_desc
[DESC_SIZE
];
269 char *p_name
, *tmp_str
;
270 BDRVVmdkState
*s
= bs
->opaque
;
273 ret
= bdrv_pread(bs
->file
, s
->desc_offset
, desc
, DESC_SIZE
);
278 desc
[DESC_SIZE
- 1] = '\0';
279 tmp_str
= strstr(desc
, "parentCID");
280 if (tmp_str
== NULL
) {
284 pstrcpy(tmp_desc
, sizeof(tmp_desc
), tmp_str
);
285 p_name
= strstr(desc
, "CID");
286 if (p_name
!= NULL
) {
287 p_name
+= sizeof("CID");
288 snprintf(p_name
, sizeof(desc
) - (p_name
- desc
), "%x\n", cid
);
289 pstrcat(desc
, sizeof(desc
), tmp_desc
);
292 ret
= bdrv_pwrite_sync(bs
->file
, s
->desc_offset
, desc
, DESC_SIZE
);
300 static int vmdk_is_cid_valid(BlockDriverState
*bs
)
303 BDRVVmdkState
*s
= bs
->opaque
;
304 BlockDriverState
*p_bs
= bs
->backing_hd
;
308 cur_pcid
= vmdk_read_cid(p_bs
, 0);
309 if (s
->parent_cid
!= cur_pcid
) {
319 /* Queue extents, if any, for reopen() */
320 static int vmdk_reopen_prepare(BDRVReopenState
*state
,
321 BlockReopenQueue
*queue
, Error
**errp
)
328 assert(state
!= NULL
);
329 assert(state
->bs
!= NULL
);
332 error_set(errp
, ERROR_CLASS_GENERIC_ERROR
,
333 "No reopen queue for VMDK extents");
337 s
= state
->bs
->opaque
;
341 for (i
= 0; i
< s
->num_extents
; i
++) {
343 if (e
->file
!= state
->bs
->file
) {
344 bdrv_reopen_queue(queue
, e
->file
, state
->flags
);
353 static int vmdk_parent_open(BlockDriverState
*bs
)
356 char desc
[DESC_SIZE
+ 1];
357 BDRVVmdkState
*s
= bs
->opaque
;
360 desc
[DESC_SIZE
] = '\0';
361 ret
= bdrv_pread(bs
->file
, s
->desc_offset
, desc
, DESC_SIZE
);
366 p_name
= strstr(desc
, "parentFileNameHint");
367 if (p_name
!= NULL
) {
370 p_name
+= sizeof("parentFileNameHint") + 1;
371 end_name
= strchr(p_name
, '\"');
372 if (end_name
== NULL
) {
375 if ((end_name
- p_name
) > sizeof(bs
->backing_file
) - 1) {
379 pstrcpy(bs
->backing_file
, end_name
- p_name
+ 1, p_name
);
385 /* Create and append extent to the extent array. Return the added VmdkExtent
386 * address. return NULL if allocation failed. */
387 static VmdkExtent
*vmdk_add_extent(BlockDriverState
*bs
,
388 BlockDriverState
*file
, bool flat
, int64_t sectors
,
389 int64_t l1_offset
, int64_t l1_backup_offset
,
391 int l2_size
, unsigned int cluster_sectors
)
394 BDRVVmdkState
*s
= bs
->opaque
;
396 s
->extents
= g_realloc(s
->extents
,
397 (s
->num_extents
+ 1) * sizeof(VmdkExtent
));
398 extent
= &s
->extents
[s
->num_extents
];
401 memset(extent
, 0, sizeof(VmdkExtent
));
404 extent
->sectors
= sectors
;
405 extent
->l1_table_offset
= l1_offset
;
406 extent
->l1_backup_table_offset
= l1_backup_offset
;
407 extent
->l1_size
= l1_size
;
408 extent
->l1_entry_sectors
= l2_size
* cluster_sectors
;
409 extent
->l2_size
= l2_size
;
410 extent
->cluster_sectors
= cluster_sectors
;
412 if (s
->num_extents
> 1) {
413 extent
->end_sector
= (*(extent
- 1)).end_sector
+ extent
->sectors
;
415 extent
->end_sector
= extent
->sectors
;
417 bs
->total_sectors
= extent
->end_sector
;
421 static int vmdk_init_tables(BlockDriverState
*bs
, VmdkExtent
*extent
)
426 /* read the L1 table */
427 l1_size
= extent
->l1_size
* sizeof(uint32_t);
428 extent
->l1_table
= g_malloc(l1_size
);
429 ret
= bdrv_pread(extent
->file
,
430 extent
->l1_table_offset
,
436 for (i
= 0; i
< extent
->l1_size
; i
++) {
437 le32_to_cpus(&extent
->l1_table
[i
]);
440 if (extent
->l1_backup_table_offset
) {
441 extent
->l1_backup_table
= g_malloc(l1_size
);
442 ret
= bdrv_pread(extent
->file
,
443 extent
->l1_backup_table_offset
,
444 extent
->l1_backup_table
,
449 for (i
= 0; i
< extent
->l1_size
; i
++) {
450 le32_to_cpus(&extent
->l1_backup_table
[i
]);
455 g_malloc(extent
->l2_size
* L2_CACHE_SIZE
* sizeof(uint32_t));
458 g_free(extent
->l1_backup_table
);
460 g_free(extent
->l1_table
);
464 static int vmdk_open_vmdk3(BlockDriverState
*bs
,
465 BlockDriverState
*file
,
473 ret
= bdrv_pread(file
, sizeof(magic
), &header
, sizeof(header
));
477 extent
= vmdk_add_extent(bs
,
479 le32_to_cpu(header
.disk_sectors
),
480 le32_to_cpu(header
.l1dir_offset
) << 9,
482 le32_to_cpu(header
.granularity
));
483 ret
= vmdk_init_tables(bs
, extent
);
485 /* free extent allocated by vmdk_add_extent */
486 vmdk_free_last_extent(bs
);
491 static int vmdk_open_desc_file(BlockDriverState
*bs
, int flags
,
492 int64_t desc_offset
);
494 static int vmdk_open_vmdk4(BlockDriverState
*bs
,
495 BlockDriverState
*file
,
500 uint32_t l1_size
, l1_entry_sectors
;
503 int64_t l1_backup_offset
= 0;
505 ret
= bdrv_pread(file
, sizeof(magic
), &header
, sizeof(header
));
509 if (header
.capacity
== 0 && header
.desc_offset
) {
510 return vmdk_open_desc_file(bs
, flags
, header
.desc_offset
<< 9);
513 if (le64_to_cpu(header
.gd_offset
) == VMDK4_GD_AT_END
) {
515 * The footer takes precedence over the header, so read it in. The
516 * footer starts at offset -1024 from the end: One sector for the
517 * footer, and another one for the end-of-stream marker.
524 uint8_t pad
[512 - 16];
525 } QEMU_PACKED footer_marker
;
529 uint8_t pad
[512 - 4 - sizeof(VMDK4Header
)];
535 uint8_t pad
[512 - 16];
536 } QEMU_PACKED eos_marker
;
537 } QEMU_PACKED footer
;
539 ret
= bdrv_pread(file
,
540 bs
->file
->total_sectors
* 512 - 1536,
541 &footer
, sizeof(footer
));
546 /* Some sanity checks for the footer */
547 if (be32_to_cpu(footer
.magic
) != VMDK4_MAGIC
||
548 le32_to_cpu(footer
.footer_marker
.size
) != 0 ||
549 le32_to_cpu(footer
.footer_marker
.type
) != MARKER_FOOTER
||
550 le64_to_cpu(footer
.eos_marker
.val
) != 0 ||
551 le32_to_cpu(footer
.eos_marker
.size
) != 0 ||
552 le32_to_cpu(footer
.eos_marker
.type
) != MARKER_END_OF_STREAM
)
557 header
= footer
.header
;
560 l1_entry_sectors
= le32_to_cpu(header
.num_gtes_per_gte
)
561 * le64_to_cpu(header
.granularity
);
562 if (l1_entry_sectors
== 0) {
565 l1_size
= (le64_to_cpu(header
.capacity
) + l1_entry_sectors
- 1)
567 if (le32_to_cpu(header
.flags
) & VMDK4_FLAG_RGD
) {
568 l1_backup_offset
= le64_to_cpu(header
.rgd_offset
) << 9;
570 extent
= vmdk_add_extent(bs
, file
, false,
571 le64_to_cpu(header
.capacity
),
572 le64_to_cpu(header
.gd_offset
) << 9,
575 le32_to_cpu(header
.num_gtes_per_gte
),
576 le64_to_cpu(header
.granularity
));
578 le16_to_cpu(header
.compressAlgorithm
) == VMDK4_COMPRESSION_DEFLATE
;
579 extent
->has_marker
= le32_to_cpu(header
.flags
) & VMDK4_FLAG_MARKER
;
580 extent
->version
= le32_to_cpu(header
.version
);
581 extent
->has_zero_grain
= le32_to_cpu(header
.flags
) & VMDK4_FLAG_ZERO_GRAIN
;
582 ret
= vmdk_init_tables(bs
, extent
);
584 /* free extent allocated by vmdk_add_extent */
585 vmdk_free_last_extent(bs
);
590 /* find an option value out of descriptor file */
591 static int vmdk_parse_description(const char *desc
, const char *opt_name
,
592 char *buf
, int buf_size
)
594 char *opt_pos
, *opt_end
;
595 const char *end
= desc
+ strlen(desc
);
597 opt_pos
= strstr(desc
, opt_name
);
601 /* Skip "=\"" following opt_name */
602 opt_pos
+= strlen(opt_name
) + 2;
603 if (opt_pos
>= end
) {
607 while (opt_end
< end
&& *opt_end
!= '"') {
610 if (opt_end
== end
|| buf_size
< opt_end
- opt_pos
+ 1) {
613 pstrcpy(buf
, opt_end
- opt_pos
+ 1, opt_pos
);
617 /* Open an extent file and append to bs array */
618 static int vmdk_open_sparse(BlockDriverState
*bs
,
619 BlockDriverState
*file
,
624 if (bdrv_pread(file
, 0, &magic
, sizeof(magic
)) != sizeof(magic
)) {
628 magic
= be32_to_cpu(magic
);
631 return vmdk_open_vmdk3(bs
, file
, flags
);
634 return vmdk_open_vmdk4(bs
, file
, flags
);
642 static int vmdk_parse_extents(const char *desc
, BlockDriverState
*bs
,
643 const char *desc_file_path
)
649 const char *p
= desc
;
652 char extent_path
[PATH_MAX
];
653 BlockDriverState
*extent_file
;
656 /* parse extent line:
657 * RW [size in sectors] FLAT "file-name.vmdk" OFFSET
659 * RW [size in sectors] SPARSE "file-name.vmdk"
662 ret
= sscanf(p
, "%10s %" SCNd64
" %10s \"%511[^\n\r\"]\" %" SCNd64
,
663 access
, §ors
, type
, fname
, &flat_offset
);
664 if (ret
< 4 || strcmp(access
, "RW")) {
666 } else if (!strcmp(type
, "FLAT")) {
667 if (ret
!= 5 || flat_offset
< 0) {
670 } else if (ret
!= 4) {
675 (strcmp(type
, "FLAT") && strcmp(type
, "SPARSE")) ||
676 (strcmp(access
, "RW"))) {
680 path_combine(extent_path
, sizeof(extent_path
),
681 desc_file_path
, fname
);
682 ret
= bdrv_file_open(&extent_file
, extent_path
, NULL
, bs
->open_flags
);
687 /* save to extents array */
688 if (!strcmp(type
, "FLAT")) {
692 extent
= vmdk_add_extent(bs
, extent_file
, true, sectors
,
693 0, 0, 0, 0, sectors
);
694 extent
->flat_start_offset
= flat_offset
<< 9;
695 } else if (!strcmp(type
, "SPARSE")) {
697 ret
= vmdk_open_sparse(bs
, extent_file
, bs
->open_flags
);
699 bdrv_delete(extent_file
);
704 "VMDK: Not supported extent type \"%s\""".\n", type
);
708 /* move to next line */
709 while (*p
&& *p
!= '\n') {
717 static int vmdk_open_desc_file(BlockDriverState
*bs
, int flags
,
723 BDRVVmdkState
*s
= bs
->opaque
;
725 ret
= bdrv_pread(bs
->file
, desc_offset
, buf
, sizeof(buf
));
730 if (vmdk_parse_description(buf
, "createType", ct
, sizeof(ct
))) {
733 if (strcmp(ct
, "monolithicFlat") &&
734 strcmp(ct
, "twoGbMaxExtentSparse") &&
735 strcmp(ct
, "twoGbMaxExtentFlat")) {
737 "VMDK: Not supported image type \"%s\""".\n", ct
);
741 return vmdk_parse_extents(buf
, bs
, bs
->file
->filename
);
744 static int vmdk_open(BlockDriverState
*bs
, QDict
*options
, int flags
)
747 BDRVVmdkState
*s
= bs
->opaque
;
749 if (vmdk_open_sparse(bs
, bs
->file
, flags
) == 0) {
750 s
->desc_offset
= 0x200;
752 ret
= vmdk_open_desc_file(bs
, flags
, 0);
757 /* try to open parent images, if exist */
758 ret
= vmdk_parent_open(bs
);
762 s
->parent_cid
= vmdk_read_cid(bs
, 1);
763 qemu_co_mutex_init(&s
->lock
);
765 /* Disable migration when VMDK images are used */
766 error_set(&s
->migration_blocker
,
767 QERR_BLOCK_FORMAT_FEATURE_NOT_SUPPORTED
,
768 "vmdk", bs
->device_name
, "live migration");
769 migrate_add_blocker(s
->migration_blocker
);
774 vmdk_free_extents(bs
);
778 static int get_whole_cluster(BlockDriverState
*bs
,
780 uint64_t cluster_offset
,
784 /* 128 sectors * 512 bytes each = grain size 64KB */
785 uint8_t whole_grain
[extent
->cluster_sectors
* 512];
787 /* we will be here if it's first write on non-exist grain(cluster).
788 * try to read from parent image, if exist */
789 if (bs
->backing_hd
) {
792 if (!vmdk_is_cid_valid(bs
)) {
796 /* floor offset to cluster */
797 offset
-= offset
% (extent
->cluster_sectors
* 512);
798 ret
= bdrv_read(bs
->backing_hd
, offset
>> 9, whole_grain
,
799 extent
->cluster_sectors
);
804 /* Write grain only into the active image */
805 ret
= bdrv_write(extent
->file
, cluster_offset
, whole_grain
,
806 extent
->cluster_sectors
);
814 static int vmdk_L2update(VmdkExtent
*extent
, VmdkMetaData
*m_data
)
817 QEMU_BUILD_BUG_ON(sizeof(offset
) != sizeof(m_data
->offset
));
818 offset
= cpu_to_le32(m_data
->offset
);
819 /* update L2 table */
820 if (bdrv_pwrite_sync(
822 ((int64_t)m_data
->l2_offset
* 512)
823 + (m_data
->l2_index
* sizeof(m_data
->offset
)),
824 &offset
, sizeof(offset
)) < 0) {
827 /* update backup L2 table */
828 if (extent
->l1_backup_table_offset
!= 0) {
829 m_data
->l2_offset
= extent
->l1_backup_table
[m_data
->l1_index
];
830 if (bdrv_pwrite_sync(
832 ((int64_t)m_data
->l2_offset
* 512)
833 + (m_data
->l2_index
* sizeof(m_data
->offset
)),
834 &offset
, sizeof(offset
)) < 0) {
842 static int get_cluster_offset(BlockDriverState
*bs
,
844 VmdkMetaData
*m_data
,
847 uint64_t *cluster_offset
)
849 unsigned int l1_index
, l2_offset
, l2_index
;
851 uint32_t min_count
, *l2_table
;
858 *cluster_offset
= extent
->flat_start_offset
;
862 offset
-= (extent
->end_sector
- extent
->sectors
) * SECTOR_SIZE
;
863 l1_index
= (offset
>> 9) / extent
->l1_entry_sectors
;
864 if (l1_index
>= extent
->l1_size
) {
867 l2_offset
= extent
->l1_table
[l1_index
];
871 for (i
= 0; i
< L2_CACHE_SIZE
; i
++) {
872 if (l2_offset
== extent
->l2_cache_offsets
[i
]) {
873 /* increment the hit count */
874 if (++extent
->l2_cache_counts
[i
] == 0xffffffff) {
875 for (j
= 0; j
< L2_CACHE_SIZE
; j
++) {
876 extent
->l2_cache_counts
[j
] >>= 1;
879 l2_table
= extent
->l2_cache
+ (i
* extent
->l2_size
);
883 /* not found: load a new entry in the least used one */
885 min_count
= 0xffffffff;
886 for (i
= 0; i
< L2_CACHE_SIZE
; i
++) {
887 if (extent
->l2_cache_counts
[i
] < min_count
) {
888 min_count
= extent
->l2_cache_counts
[i
];
892 l2_table
= extent
->l2_cache
+ (min_index
* extent
->l2_size
);
895 (int64_t)l2_offset
* 512,
897 extent
->l2_size
* sizeof(uint32_t)
898 ) != extent
->l2_size
* sizeof(uint32_t)) {
902 extent
->l2_cache_offsets
[min_index
] = l2_offset
;
903 extent
->l2_cache_counts
[min_index
] = 1;
905 l2_index
= ((offset
>> 9) / extent
->cluster_sectors
) % extent
->l2_size
;
906 *cluster_offset
= le32_to_cpu(l2_table
[l2_index
]);
908 if (extent
->has_zero_grain
&& *cluster_offset
== VMDK_GTE_ZEROED
) {
912 if (!*cluster_offset
|| zeroed
) {
914 return zeroed
? VMDK_ZEROED
: VMDK_UNALLOC
;
917 /* Avoid the L2 tables update for the images that have snapshots. */
918 *cluster_offset
= bdrv_getlength(extent
->file
);
919 if (!extent
->compressed
) {
922 *cluster_offset
+ (extent
->cluster_sectors
<< 9)
926 *cluster_offset
>>= 9;
927 l2_table
[l2_index
] = cpu_to_le32(*cluster_offset
);
929 /* First of all we write grain itself, to avoid race condition
930 * that may to corrupt the image.
931 * This problem may occur because of insufficient space on host disk
932 * or inappropriate VM shutdown.
934 if (get_whole_cluster(
935 bs
, extent
, *cluster_offset
, offset
, allocate
) == -1) {
940 m_data
->offset
= *cluster_offset
;
941 m_data
->l1_index
= l1_index
;
942 m_data
->l2_index
= l2_index
;
943 m_data
->l2_offset
= l2_offset
;
947 *cluster_offset
<<= 9;
951 static VmdkExtent
*find_extent(BDRVVmdkState
*s
,
952 int64_t sector_num
, VmdkExtent
*start_hint
)
954 VmdkExtent
*extent
= start_hint
;
957 extent
= &s
->extents
[0];
959 while (extent
< &s
->extents
[s
->num_extents
]) {
960 if (sector_num
< extent
->end_sector
) {
968 static int coroutine_fn
vmdk_co_is_allocated(BlockDriverState
*bs
,
969 int64_t sector_num
, int nb_sectors
, int *pnum
)
971 BDRVVmdkState
*s
= bs
->opaque
;
972 int64_t index_in_cluster
, n
, ret
;
976 extent
= find_extent(s
, sector_num
, NULL
);
980 qemu_co_mutex_lock(&s
->lock
);
981 ret
= get_cluster_offset(bs
, extent
, NULL
,
982 sector_num
* 512, 0, &offset
);
983 qemu_co_mutex_unlock(&s
->lock
);
985 ret
= (ret
== VMDK_OK
|| ret
== VMDK_ZEROED
);
987 index_in_cluster
= sector_num
% extent
->cluster_sectors
;
988 n
= extent
->cluster_sectors
- index_in_cluster
;
989 if (n
> nb_sectors
) {
996 static int vmdk_write_extent(VmdkExtent
*extent
, int64_t cluster_offset
,
997 int64_t offset_in_cluster
, const uint8_t *buf
,
998 int nb_sectors
, int64_t sector_num
)
1001 VmdkGrainMarker
*data
= NULL
;
1003 const uint8_t *write_buf
= buf
;
1004 int write_len
= nb_sectors
* 512;
1006 if (extent
->compressed
) {
1007 if (!extent
->has_marker
) {
1011 buf_len
= (extent
->cluster_sectors
<< 9) * 2;
1012 data
= g_malloc(buf_len
+ sizeof(VmdkGrainMarker
));
1013 if (compress(data
->data
, &buf_len
, buf
, nb_sectors
<< 9) != Z_OK
||
1018 data
->lba
= sector_num
;
1019 data
->size
= buf_len
;
1020 write_buf
= (uint8_t *)data
;
1021 write_len
= buf_len
+ sizeof(VmdkGrainMarker
);
1023 ret
= bdrv_pwrite(extent
->file
,
1024 cluster_offset
+ offset_in_cluster
,
1027 if (ret
!= write_len
) {
1028 ret
= ret
< 0 ? ret
: -EIO
;
1037 static int vmdk_read_extent(VmdkExtent
*extent
, int64_t cluster_offset
,
1038 int64_t offset_in_cluster
, uint8_t *buf
,
1042 int cluster_bytes
, buf_bytes
;
1043 uint8_t *cluster_buf
, *compressed_data
;
1044 uint8_t *uncomp_buf
;
1046 VmdkGrainMarker
*marker
;
1050 if (!extent
->compressed
) {
1051 ret
= bdrv_pread(extent
->file
,
1052 cluster_offset
+ offset_in_cluster
,
1053 buf
, nb_sectors
* 512);
1054 if (ret
== nb_sectors
* 512) {
1060 cluster_bytes
= extent
->cluster_sectors
* 512;
1061 /* Read two clusters in case GrainMarker + compressed data > one cluster */
1062 buf_bytes
= cluster_bytes
* 2;
1063 cluster_buf
= g_malloc(buf_bytes
);
1064 uncomp_buf
= g_malloc(cluster_bytes
);
1065 ret
= bdrv_pread(extent
->file
,
1067 cluster_buf
, buf_bytes
);
1071 compressed_data
= cluster_buf
;
1072 buf_len
= cluster_bytes
;
1073 data_len
= cluster_bytes
;
1074 if (extent
->has_marker
) {
1075 marker
= (VmdkGrainMarker
*)cluster_buf
;
1076 compressed_data
= marker
->data
;
1077 data_len
= le32_to_cpu(marker
->size
);
1079 if (!data_len
|| data_len
> buf_bytes
) {
1083 ret
= uncompress(uncomp_buf
, &buf_len
, compressed_data
, data_len
);
1089 if (offset_in_cluster
< 0 ||
1090 offset_in_cluster
+ nb_sectors
* 512 > buf_len
) {
1094 memcpy(buf
, uncomp_buf
+ offset_in_cluster
, nb_sectors
* 512);
1099 g_free(cluster_buf
);
1103 static int vmdk_read(BlockDriverState
*bs
, int64_t sector_num
,
1104 uint8_t *buf
, int nb_sectors
)
1106 BDRVVmdkState
*s
= bs
->opaque
;
1108 uint64_t n
, index_in_cluster
;
1109 uint64_t extent_begin_sector
, extent_relative_sector_num
;
1110 VmdkExtent
*extent
= NULL
;
1111 uint64_t cluster_offset
;
1113 while (nb_sectors
> 0) {
1114 extent
= find_extent(s
, sector_num
, extent
);
1118 ret
= get_cluster_offset(
1120 sector_num
<< 9, 0, &cluster_offset
);
1121 extent_begin_sector
= extent
->end_sector
- extent
->sectors
;
1122 extent_relative_sector_num
= sector_num
- extent_begin_sector
;
1123 index_in_cluster
= extent_relative_sector_num
% extent
->cluster_sectors
;
1124 n
= extent
->cluster_sectors
- index_in_cluster
;
1125 if (n
> nb_sectors
) {
1128 if (ret
!= VMDK_OK
) {
1129 /* if not allocated, try to read from parent image, if exist */
1130 if (bs
->backing_hd
&& ret
!= VMDK_ZEROED
) {
1131 if (!vmdk_is_cid_valid(bs
)) {
1134 ret
= bdrv_read(bs
->backing_hd
, sector_num
, buf
, n
);
1139 memset(buf
, 0, 512 * n
);
1142 ret
= vmdk_read_extent(extent
,
1143 cluster_offset
, index_in_cluster
* 512,
1156 static coroutine_fn
int vmdk_co_read(BlockDriverState
*bs
, int64_t sector_num
,
1157 uint8_t *buf
, int nb_sectors
)
1160 BDRVVmdkState
*s
= bs
->opaque
;
1161 qemu_co_mutex_lock(&s
->lock
);
1162 ret
= vmdk_read(bs
, sector_num
, buf
, nb_sectors
);
1163 qemu_co_mutex_unlock(&s
->lock
);
1167 static int vmdk_write(BlockDriverState
*bs
, int64_t sector_num
,
1168 const uint8_t *buf
, int nb_sectors
)
1170 BDRVVmdkState
*s
= bs
->opaque
;
1171 VmdkExtent
*extent
= NULL
;
1173 int64_t index_in_cluster
;
1174 uint64_t extent_begin_sector
, extent_relative_sector_num
;
1175 uint64_t cluster_offset
;
1176 VmdkMetaData m_data
;
1178 if (sector_num
> bs
->total_sectors
) {
1180 "(VMDK) Wrong offset: sector_num=0x%" PRIx64
1181 " total_sectors=0x%" PRIx64
"\n",
1182 sector_num
, bs
->total_sectors
);
1186 while (nb_sectors
> 0) {
1187 extent
= find_extent(s
, sector_num
, extent
);
1191 ret
= get_cluster_offset(
1195 sector_num
<< 9, !extent
->compressed
,
1197 if (extent
->compressed
) {
1198 if (ret
== VMDK_OK
) {
1199 /* Refuse write to allocated cluster for streamOptimized */
1201 "VMDK: can't write to allocated cluster"
1202 " for streamOptimized\n");
1206 ret
= get_cluster_offset(
1217 extent_begin_sector
= extent
->end_sector
- extent
->sectors
;
1218 extent_relative_sector_num
= sector_num
- extent_begin_sector
;
1219 index_in_cluster
= extent_relative_sector_num
% extent
->cluster_sectors
;
1220 n
= extent
->cluster_sectors
- index_in_cluster
;
1221 if (n
> nb_sectors
) {
1225 ret
= vmdk_write_extent(extent
,
1226 cluster_offset
, index_in_cluster
* 512,
1227 buf
, n
, sector_num
);
1232 /* update L2 tables */
1233 if (vmdk_L2update(extent
, &m_data
) == -1) {
1241 /* update CID on the first write every time the virtual disk is
1243 if (!s
->cid_updated
) {
1244 ret
= vmdk_write_cid(bs
, time(NULL
));
1248 s
->cid_updated
= true;
1254 static coroutine_fn
int vmdk_co_write(BlockDriverState
*bs
, int64_t sector_num
,
1255 const uint8_t *buf
, int nb_sectors
)
1258 BDRVVmdkState
*s
= bs
->opaque
;
1259 qemu_co_mutex_lock(&s
->lock
);
1260 ret
= vmdk_write(bs
, sector_num
, buf
, nb_sectors
);
1261 qemu_co_mutex_unlock(&s
->lock
);
1266 static int vmdk_create_extent(const char *filename
, int64_t filesize
,
1267 bool flat
, bool compress
, bool zeroed_grain
)
1272 uint32_t tmp
, magic
, grains
, gd_size
, gt_size
, gt_count
;
1274 fd
= qemu_open(filename
,
1275 O_WRONLY
| O_CREAT
| O_TRUNC
| O_BINARY
| O_LARGEFILE
,
1281 ret
= ftruncate(fd
, filesize
);
1287 magic
= cpu_to_be32(VMDK4_MAGIC
);
1288 memset(&header
, 0, sizeof(header
));
1289 header
.version
= zeroed_grain
? 2 : 1;
1290 header
.flags
= VMDK4_FLAG_RGD
| VMDK4_FLAG_NL_DETECT
1291 | (compress
? VMDK4_FLAG_COMPRESS
| VMDK4_FLAG_MARKER
: 0)
1292 | (zeroed_grain
? VMDK4_FLAG_ZERO_GRAIN
: 0);
1293 header
.compressAlgorithm
= compress
? VMDK4_COMPRESSION_DEFLATE
: 0;
1294 header
.capacity
= filesize
/ 512;
1295 header
.granularity
= 128;
1296 header
.num_gtes_per_gte
= 512;
1298 grains
= (filesize
/ 512 + header
.granularity
- 1) / header
.granularity
;
1299 gt_size
= ((header
.num_gtes_per_gte
* sizeof(uint32_t)) + 511) >> 9;
1301 (grains
+ header
.num_gtes_per_gte
- 1) / header
.num_gtes_per_gte
;
1302 gd_size
= (gt_count
* sizeof(uint32_t) + 511) >> 9;
1304 header
.desc_offset
= 1;
1305 header
.desc_size
= 20;
1306 header
.rgd_offset
= header
.desc_offset
+ header
.desc_size
;
1307 header
.gd_offset
= header
.rgd_offset
+ gd_size
+ (gt_size
* gt_count
);
1308 header
.grain_offset
=
1309 ((header
.gd_offset
+ gd_size
+ (gt_size
* gt_count
) +
1310 header
.granularity
- 1) / header
.granularity
) *
1312 /* swap endianness for all header fields */
1313 header
.version
= cpu_to_le32(header
.version
);
1314 header
.flags
= cpu_to_le32(header
.flags
);
1315 header
.capacity
= cpu_to_le64(header
.capacity
);
1316 header
.granularity
= cpu_to_le64(header
.granularity
);
1317 header
.num_gtes_per_gte
= cpu_to_le32(header
.num_gtes_per_gte
);
1318 header
.desc_offset
= cpu_to_le64(header
.desc_offset
);
1319 header
.desc_size
= cpu_to_le64(header
.desc_size
);
1320 header
.rgd_offset
= cpu_to_le64(header
.rgd_offset
);
1321 header
.gd_offset
= cpu_to_le64(header
.gd_offset
);
1322 header
.grain_offset
= cpu_to_le64(header
.grain_offset
);
1323 header
.compressAlgorithm
= cpu_to_le16(header
.compressAlgorithm
);
1325 header
.check_bytes
[0] = 0xa;
1326 header
.check_bytes
[1] = 0x20;
1327 header
.check_bytes
[2] = 0xd;
1328 header
.check_bytes
[3] = 0xa;
1330 /* write all the data */
1331 ret
= qemu_write_full(fd
, &magic
, sizeof(magic
));
1332 if (ret
!= sizeof(magic
)) {
1336 ret
= qemu_write_full(fd
, &header
, sizeof(header
));
1337 if (ret
!= sizeof(header
)) {
1342 ret
= ftruncate(fd
, le64_to_cpu(header
.grain_offset
) << 9);
1348 /* write grain directory */
1349 lseek(fd
, le64_to_cpu(header
.rgd_offset
) << 9, SEEK_SET
);
1350 for (i
= 0, tmp
= le64_to_cpu(header
.rgd_offset
) + gd_size
;
1351 i
< gt_count
; i
++, tmp
+= gt_size
) {
1352 ret
= qemu_write_full(fd
, &tmp
, sizeof(tmp
));
1353 if (ret
!= sizeof(tmp
)) {
1359 /* write backup grain directory */
1360 lseek(fd
, le64_to_cpu(header
.gd_offset
) << 9, SEEK_SET
);
1361 for (i
= 0, tmp
= le64_to_cpu(header
.gd_offset
) + gd_size
;
1362 i
< gt_count
; i
++, tmp
+= gt_size
) {
1363 ret
= qemu_write_full(fd
, &tmp
, sizeof(tmp
));
1364 if (ret
!= sizeof(tmp
)) {
1376 static int filename_decompose(const char *filename
, char *path
, char *prefix
,
1377 char *postfix
, size_t buf_len
)
1381 if (filename
== NULL
|| !strlen(filename
)) {
1382 fprintf(stderr
, "Vmdk: no filename provided.\n");
1385 p
= strrchr(filename
, '/');
1387 p
= strrchr(filename
, '\\');
1390 p
= strrchr(filename
, ':');
1394 if (p
- filename
>= buf_len
) {
1397 pstrcpy(path
, p
- filename
+ 1, filename
);
1402 q
= strrchr(p
, '.');
1404 pstrcpy(prefix
, buf_len
, p
);
1407 if (q
- p
>= buf_len
) {
1410 pstrcpy(prefix
, q
- p
+ 1, p
);
1411 pstrcpy(postfix
, buf_len
, q
);
1416 static int relative_path(char *dest
, int dest_size
,
1417 const char *base
, const char *target
)
1423 const char *sep
= "\\";
1425 const char *sep
= "/";
1428 if (!(dest
&& base
&& target
)) {
1431 if (path_is_absolute(target
)) {
1432 pstrcpy(dest
, dest_size
, target
);
1435 while (base
[i
] == target
[i
]) {
1448 pstrcat(dest
, dest_size
, "..");
1449 pstrcat(dest
, dest_size
, sep
);
1451 pstrcat(dest
, dest_size
, q
);
1455 static int vmdk_create(const char *filename
, QEMUOptionParameter
*options
)
1458 char desc
[BUF_SIZE
];
1459 int64_t total_size
= 0, filesize
;
1460 const char *adapter_type
= NULL
;
1461 const char *backing_file
= NULL
;
1462 const char *fmt
= NULL
;
1465 bool flat
, split
, compress
;
1466 char ext_desc_lines
[BUF_SIZE
] = "";
1467 char path
[PATH_MAX
], prefix
[PATH_MAX
], postfix
[PATH_MAX
];
1468 const int64_t split_size
= 0x80000000; /* VMDK has constant split size */
1469 const char *desc_extent_line
;
1470 char parent_desc_line
[BUF_SIZE
] = "";
1471 uint32_t parent_cid
= 0xffffffff;
1472 uint32_t number_heads
= 16;
1473 bool zeroed_grain
= false;
1474 const char desc_template
[] =
1475 "# Disk DescriptorFile\n"
1479 "createType=\"%s\"\n"
1482 "# Extent description\n"
1485 "# The Disk Data Base\n"
1488 "ddb.virtualHWVersion = \"%d\"\n"
1489 "ddb.geometry.cylinders = \"%" PRId64
"\"\n"
1490 "ddb.geometry.heads = \"%d\"\n"
1491 "ddb.geometry.sectors = \"63\"\n"
1492 "ddb.adapterType = \"%s\"\n";
1494 if (filename_decompose(filename
, path
, prefix
, postfix
, PATH_MAX
)) {
1497 /* Read out options */
1498 while (options
&& options
->name
) {
1499 if (!strcmp(options
->name
, BLOCK_OPT_SIZE
)) {
1500 total_size
= options
->value
.n
;
1501 } else if (!strcmp(options
->name
, BLOCK_OPT_ADAPTER_TYPE
)) {
1502 adapter_type
= options
->value
.s
;
1503 } else if (!strcmp(options
->name
, BLOCK_OPT_BACKING_FILE
)) {
1504 backing_file
= options
->value
.s
;
1505 } else if (!strcmp(options
->name
, BLOCK_OPT_COMPAT6
)) {
1506 flags
|= options
->value
.n
? BLOCK_FLAG_COMPAT6
: 0;
1507 } else if (!strcmp(options
->name
, BLOCK_OPT_SUBFMT
)) {
1508 fmt
= options
->value
.s
;
1509 } else if (!strcmp(options
->name
, BLOCK_OPT_ZEROED_GRAIN
)) {
1510 zeroed_grain
|= options
->value
.n
;
1514 if (!adapter_type
) {
1515 adapter_type
= "ide";
1516 } else if (strcmp(adapter_type
, "ide") &&
1517 strcmp(adapter_type
, "buslogic") &&
1518 strcmp(adapter_type
, "lsilogic") &&
1519 strcmp(adapter_type
, "legacyESX")) {
1520 fprintf(stderr
, "VMDK: Unknown adapter type: '%s'.\n", adapter_type
);
1523 if (strcmp(adapter_type
, "ide") != 0) {
1524 /* that's the number of heads with which vmware operates when
1525 creating, exporting, etc. vmdk files with a non-ide adapter type */
1529 /* Default format to monolithicSparse */
1530 fmt
= "monolithicSparse";
1531 } else if (strcmp(fmt
, "monolithicFlat") &&
1532 strcmp(fmt
, "monolithicSparse") &&
1533 strcmp(fmt
, "twoGbMaxExtentSparse") &&
1534 strcmp(fmt
, "twoGbMaxExtentFlat") &&
1535 strcmp(fmt
, "streamOptimized")) {
1536 fprintf(stderr
, "VMDK: Unknown subformat: %s\n", fmt
);
1539 split
= !(strcmp(fmt
, "twoGbMaxExtentFlat") &&
1540 strcmp(fmt
, "twoGbMaxExtentSparse"));
1541 flat
= !(strcmp(fmt
, "monolithicFlat") &&
1542 strcmp(fmt
, "twoGbMaxExtentFlat"));
1543 compress
= !strcmp(fmt
, "streamOptimized");
1545 desc_extent_line
= "RW %lld FLAT \"%s\" 0\n";
1547 desc_extent_line
= "RW %lld SPARSE \"%s\"\n";
1549 if (flat
&& backing_file
) {
1550 /* not supporting backing file for flat image */
1554 char parent_filename
[PATH_MAX
];
1555 BlockDriverState
*bs
= bdrv_new("");
1556 ret
= bdrv_open(bs
, backing_file
, NULL
, 0, NULL
);
1561 if (strcmp(bs
->drv
->format_name
, "vmdk")) {
1565 parent_cid
= vmdk_read_cid(bs
, 0);
1567 relative_path(parent_filename
, sizeof(parent_filename
),
1568 filename
, backing_file
);
1569 snprintf(parent_desc_line
, sizeof(parent_desc_line
),
1570 "parentFileNameHint=\"%s\"", parent_filename
);
1573 /* Create extents */
1574 filesize
= total_size
;
1575 while (filesize
> 0) {
1576 char desc_line
[BUF_SIZE
];
1577 char ext_filename
[PATH_MAX
];
1578 char desc_filename
[PATH_MAX
];
1579 int64_t size
= filesize
;
1581 if (split
&& size
> split_size
) {
1585 snprintf(desc_filename
, sizeof(desc_filename
), "%s-%c%03d%s",
1586 prefix
, flat
? 'f' : 's', ++idx
, postfix
);
1588 snprintf(desc_filename
, sizeof(desc_filename
), "%s-flat%s",
1591 snprintf(desc_filename
, sizeof(desc_filename
), "%s%s",
1594 snprintf(ext_filename
, sizeof(ext_filename
), "%s%s",
1595 path
, desc_filename
);
1597 if (vmdk_create_extent(ext_filename
, size
,
1598 flat
, compress
, zeroed_grain
)) {
1603 /* Format description line */
1604 snprintf(desc_line
, sizeof(desc_line
),
1605 desc_extent_line
, size
/ 512, desc_filename
);
1606 pstrcat(ext_desc_lines
, sizeof(ext_desc_lines
), desc_line
);
1608 /* generate descriptor file */
1609 snprintf(desc
, sizeof(desc
), desc_template
,
1610 (unsigned int)time(NULL
),
1615 (flags
& BLOCK_FLAG_COMPAT6
? 6 : 4),
1616 total_size
/ (int64_t)(63 * number_heads
* 512), number_heads
,
1618 if (split
|| flat
) {
1619 fd
= qemu_open(filename
,
1620 O_WRONLY
| O_CREAT
| O_TRUNC
| O_BINARY
| O_LARGEFILE
,
1623 fd
= qemu_open(filename
,
1624 O_WRONLY
| O_BINARY
| O_LARGEFILE
,
1630 /* the descriptor offset = 0x200 */
1631 if (!split
&& !flat
&& 0x200 != lseek(fd
, 0x200, SEEK_SET
)) {
1635 ret
= qemu_write_full(fd
, desc
, strlen(desc
));
1636 if (ret
!= strlen(desc
)) {
1646 static void vmdk_close(BlockDriverState
*bs
)
1648 BDRVVmdkState
*s
= bs
->opaque
;
1650 vmdk_free_extents(bs
);
1652 migrate_del_blocker(s
->migration_blocker
);
1653 error_free(s
->migration_blocker
);
1656 static coroutine_fn
int vmdk_co_flush(BlockDriverState
*bs
)
1658 BDRVVmdkState
*s
= bs
->opaque
;
1662 for (i
= 0; i
< s
->num_extents
; i
++) {
1663 err
= bdrv_co_flush(s
->extents
[i
].file
);
1671 static int64_t vmdk_get_allocated_file_size(BlockDriverState
*bs
)
1676 BDRVVmdkState
*s
= bs
->opaque
;
1678 ret
= bdrv_get_allocated_file_size(bs
->file
);
1682 for (i
= 0; i
< s
->num_extents
; i
++) {
1683 if (s
->extents
[i
].file
== bs
->file
) {
1686 r
= bdrv_get_allocated_file_size(s
->extents
[i
].file
);
1695 static QEMUOptionParameter vmdk_create_options
[] = {
1697 .name
= BLOCK_OPT_SIZE
,
1699 .help
= "Virtual disk size"
1702 .name
= BLOCK_OPT_ADAPTER_TYPE
,
1704 .help
= "Virtual adapter type, can be one of "
1705 "ide (default), lsilogic, buslogic or legacyESX"
1708 .name
= BLOCK_OPT_BACKING_FILE
,
1710 .help
= "File name of a base image"
1713 .name
= BLOCK_OPT_COMPAT6
,
1715 .help
= "VMDK version 6 image"
1718 .name
= BLOCK_OPT_SUBFMT
,
1721 "VMDK flat extent format, can be one of "
1722 "{monolithicSparse (default) | monolithicFlat | twoGbMaxExtentSparse | twoGbMaxExtentFlat | streamOptimized} "
1725 .name
= BLOCK_OPT_ZEROED_GRAIN
,
1727 .help
= "Enable efficient zero writes using the zeroed-grain GTE feature"
1732 static BlockDriver bdrv_vmdk
= {
1733 .format_name
= "vmdk",
1734 .instance_size
= sizeof(BDRVVmdkState
),
1735 .bdrv_probe
= vmdk_probe
,
1736 .bdrv_open
= vmdk_open
,
1737 .bdrv_reopen_prepare
= vmdk_reopen_prepare
,
1738 .bdrv_read
= vmdk_co_read
,
1739 .bdrv_write
= vmdk_co_write
,
1740 .bdrv_close
= vmdk_close
,
1741 .bdrv_create
= vmdk_create
,
1742 .bdrv_co_flush_to_disk
= vmdk_co_flush
,
1743 .bdrv_co_is_allocated
= vmdk_co_is_allocated
,
1744 .bdrv_get_allocated_file_size
= vmdk_get_allocated_file_size
,
1746 .create_options
= vmdk_create_options
,
1749 static void bdrv_vmdk_init(void)
1751 bdrv_register(&bdrv_vmdk
);
1754 block_init(bdrv_vmdk_init
);