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
27 #include "block_int.h"
29 #define VMDK3_MAGIC (('C' << 24) | ('O' << 16) | ('W' << 8) | 'D')
30 #define VMDK4_MAGIC (('K' << 24) | ('D' << 16) | ('M' << 8) | 'V')
35 uint32_t disk_sectors
;
37 uint32_t l1dir_offset
;
39 uint32_t file_sectors
;
42 uint32_t sectors_per_track
;
52 int32_t num_gtes_per_gte
;
58 } __attribute__((packed
)) VMDK4Header
;
60 #define L2_CACHE_SIZE 16
62 typedef struct BDRVVmdkState
{
64 int64_t l1_table_offset
;
65 int64_t l1_backup_table_offset
;
67 uint32_t *l1_backup_table
;
69 uint32_t l1_entry_sectors
;
73 uint32_t l2_cache_offsets
[L2_CACHE_SIZE
];
74 uint32_t l2_cache_counts
[L2_CACHE_SIZE
];
76 unsigned int cluster_sectors
;
82 typedef struct VmdkMetaData
{
84 unsigned int l1_index
;
85 unsigned int l2_index
;
86 unsigned int l2_offset
;
90 typedef struct ActiveBDRVState
{
91 BlockDriverState
*hd
; // active image handler
92 uint64_t cluster_offset
; // current write offset
95 static ActiveBDRVState activeBDRV
;
97 DiskIOStatistics
vmdk_io_statistics(BlockDriverState
*bs
)
99 BDRVVmdkState
*s
= bs
->opaque
;
100 // return disk I/O counters
104 static int vmdk_probe(const uint8_t *buf
, int buf_size
, const char *filename
)
110 magic
= be32_to_cpu(*(uint32_t *)buf
);
111 if (magic
== VMDK3_MAGIC
||
112 magic
== VMDK4_MAGIC
)
120 #define SECTOR_SIZE 512
121 #define DESC_SIZE 20*SECTOR_SIZE // 20 sectors of 512 bytes each
122 #define HEADER_SIZE 512 // first sector of 512 bytes
124 static uint32_t vmdk_read_cid(BlockDriverState
*bs
, int parent
)
126 BDRVVmdkState
*s
= bs
->opaque
;
127 char desc
[DESC_SIZE
];
129 char *p_name
, *cid_str
;
132 /* the descriptor offset = 0x200 */
133 if (bdrv_pread(s
->hd
, 0x200, desc
, DESC_SIZE
) != DESC_SIZE
)
137 cid_str
= "parentCID";
138 cid_str_size
= sizeof("parentCID");
141 cid_str_size
= sizeof("CID");
144 if ((p_name
= strstr(desc
,cid_str
)) != 0) {
145 p_name
+= cid_str_size
;
146 sscanf(p_name
,"%x",&cid
);
152 static int vmdk_write_cid(BlockDriverState
*bs
, uint32_t cid
)
154 BDRVVmdkState
*s
= bs
->opaque
;
155 char desc
[DESC_SIZE
], tmp_desc
[DESC_SIZE
];
156 char *p_name
, *tmp_str
;
158 /* the descriptor offset = 0x200 */
159 if (bdrv_pread(s
->hd
, 0x200, desc
, DESC_SIZE
) != DESC_SIZE
)
162 tmp_str
= strstr(desc
,"parentCID");
163 strcpy(tmp_desc
, tmp_str
);
164 if ((p_name
= strstr(desc
,"CID")) != 0) {
165 p_name
+= sizeof("CID");
166 sprintf(p_name
,"%x\n",cid
);
167 strcat(desc
,tmp_desc
);
170 if (bdrv_pwrite(s
->hd
, 0x200, desc
, DESC_SIZE
) != DESC_SIZE
)
175 static int vmdk_is_cid_valid(BlockDriverState
*bs
)
178 BDRVVmdkState
*s
= bs
->opaque
;
179 BlockDriverState
*p_bs
= s
->hd
->backing_hd
;
183 cur_pcid
= vmdk_read_cid(p_bs
,0);
184 if (s
->parent_cid
!= cur_pcid
)
193 static int vmdk_snapshot_create(const char *filename
, const char *backing_file
)
197 char *p_name
, *gd_buf
, *rgd_buf
;
198 const char *real_filename
, *temp_str
;
200 uint32_t gde_entries
, gd_size
;
201 int64_t gd_offset
, rgd_offset
, capacity
, gt_size
;
202 char p_desc
[DESC_SIZE
], s_desc
[DESC_SIZE
], hdr
[HEADER_SIZE
];
203 char *desc_template
=
204 "# Disk DescriptorFile\n"
208 "createType=\"monolithicSparse\"\n"
209 "parentFileNameHint=\"%s\"\n"
211 "# Extent description\n"
212 "RW %lu SPARSE \"%s\"\n"
214 "# The Disk Data Base \n"
218 snp_fd
= open(filename
, O_RDWR
| O_CREAT
| O_TRUNC
| O_BINARY
| O_LARGEFILE
, 0644);
221 p_fd
= open(backing_file
, O_RDONLY
| O_BINARY
| O_LARGEFILE
);
227 /* read the header */
228 if (lseek(p_fd
, 0x0, SEEK_SET
) == -1)
230 if (read(p_fd
, hdr
, HEADER_SIZE
) != HEADER_SIZE
)
233 /* write the header */
234 if (lseek(snp_fd
, 0x0, SEEK_SET
) == -1)
236 if (write(snp_fd
, hdr
, HEADER_SIZE
) == -1)
239 memset(&header
, 0, sizeof(header
));
240 memcpy(&header
,&hdr
[4], sizeof(header
)); // skip the VMDK4_MAGIC
242 ftruncate(snp_fd
, header
.grain_offset
<< 9);
243 /* the descriptor offset = 0x200 */
244 if (lseek(p_fd
, 0x200, SEEK_SET
) == -1)
246 if (read(p_fd
, p_desc
, DESC_SIZE
) != DESC_SIZE
)
249 if ((p_name
= strstr(p_desc
,"CID")) != 0) {
250 p_name
+= sizeof("CID");
251 sscanf(p_name
,"%x",&p_cid
);
254 real_filename
= filename
;
255 if ((temp_str
= strrchr(real_filename
, '\\')) != NULL
)
256 real_filename
= temp_str
+ 1;
257 if ((temp_str
= strrchr(real_filename
, '/')) != NULL
)
258 real_filename
= temp_str
+ 1;
259 if ((temp_str
= strrchr(real_filename
, ':')) != NULL
)
260 real_filename
= temp_str
+ 1;
262 sprintf(s_desc
, desc_template
, p_cid
, p_cid
, backing_file
263 , (uint32_t)header
.capacity
, real_filename
);
265 /* write the descriptor */
266 if (lseek(snp_fd
, 0x200, SEEK_SET
) == -1)
268 if (write(snp_fd
, s_desc
, strlen(s_desc
)) == -1)
271 gd_offset
= header
.gd_offset
* SECTOR_SIZE
; // offset of GD table
272 rgd_offset
= header
.rgd_offset
* SECTOR_SIZE
; // offset of RGD table
273 capacity
= header
.capacity
* SECTOR_SIZE
; // Extent size
275 * Each GDE span 32M disk, means:
276 * 512 GTE per GT, each GTE points to grain
278 gt_size
= (int64_t)header
.num_gtes_per_gte
* header
.granularity
* SECTOR_SIZE
;
281 gde_entries
= (uint32_t)(capacity
/ gt_size
); // number of gde/rgde
282 gd_size
= gde_entries
* sizeof(uint32_t);
285 rgd_buf
= qemu_malloc(gd_size
);
288 if (lseek(p_fd
, rgd_offset
, SEEK_SET
) == -1)
290 if (read(p_fd
, rgd_buf
, gd_size
) != gd_size
)
292 if (lseek(snp_fd
, rgd_offset
, SEEK_SET
) == -1)
294 if (write(snp_fd
, rgd_buf
, gd_size
) == -1)
299 gd_buf
= qemu_malloc(gd_size
);
302 if (lseek(p_fd
, gd_offset
, SEEK_SET
) == -1)
304 if (read(p_fd
, gd_buf
, gd_size
) != gd_size
)
306 if (lseek(snp_fd
, gd_offset
, SEEK_SET
) == -1)
308 if (write(snp_fd
, gd_buf
, gd_size
) == -1)
326 static void vmdk_parent_close(BlockDriverState
*bs
)
329 bdrv_close(bs
->backing_hd
);
333 static int vmdk_parent_open(BlockDriverState
*bs
, const char * filename
)
335 BDRVVmdkState
*s
= bs
->opaque
;
337 char desc
[DESC_SIZE
];
338 char parent_img_name
[1024];
340 /* the descriptor offset = 0x200 */
341 if (bdrv_pread(s
->hd
, 0x200, desc
, DESC_SIZE
) != DESC_SIZE
)
344 if ((p_name
= strstr(desc
,"parentFileNameHint")) != 0) {
346 struct stat file_buf
;
348 p_name
+= sizeof("parentFileNameHint") + 1;
349 if ((end_name
= strchr(p_name
,'\"')) == 0)
352 strncpy(s
->hd
->backing_file
, p_name
, end_name
- p_name
);
353 if (stat(s
->hd
->backing_file
, &file_buf
) != 0) {
354 path_combine(parent_img_name
, sizeof(parent_img_name
),
355 filename
, s
->hd
->backing_file
);
357 strcpy(parent_img_name
, s
->hd
->backing_file
);
360 s
->hd
->backing_hd
= bdrv_new("");
361 if (!s
->hd
->backing_hd
) {
367 if (bdrv_open(s
->hd
->backing_hd
, parent_img_name
, BDRV_O_RDONLY
) < 0)
375 static int vmdk_open(BlockDriverState
*bs
, const char *filename
, int flags
)
377 BDRVVmdkState
*s
= bs
->opaque
;
382 // Parent must be opened as RO.
383 flags
= BDRV_O_RDONLY
;
384 fprintf(stderr
, "(VMDK) image open: flags=0x%x filename=%s\n", flags
, bs
->filename
);
386 ret
= bdrv_file_open(&s
->hd
, filename
, flags
);
389 if (bdrv_pread(s
->hd
, 0, &magic
, sizeof(magic
)) != sizeof(magic
))
392 magic
= be32_to_cpu(magic
);
393 if (magic
== VMDK3_MAGIC
) {
396 if (bdrv_pread(s
->hd
, sizeof(magic
), &header
, sizeof(header
)) != sizeof(header
))
398 s
->cluster_sectors
= le32_to_cpu(header
.granularity
);
401 bs
->total_sectors
= le32_to_cpu(header
.disk_sectors
);
402 s
->l1_table_offset
= le32_to_cpu(header
.l1dir_offset
) << 9;
403 s
->l1_backup_table_offset
= 0;
404 s
->l1_entry_sectors
= s
->l2_size
* s
->cluster_sectors
;
405 } else if (magic
== VMDK4_MAGIC
) {
408 if (bdrv_pread(s
->hd
, sizeof(magic
), &header
, sizeof(header
)) != sizeof(header
))
410 bs
->total_sectors
= le64_to_cpu(header
.capacity
);
411 s
->cluster_sectors
= le64_to_cpu(header
.granularity
);
412 s
->l2_size
= le32_to_cpu(header
.num_gtes_per_gte
);
413 s
->l1_entry_sectors
= s
->l2_size
* s
->cluster_sectors
;
414 if (s
->l1_entry_sectors
<= 0)
416 s
->l1_size
= (bs
->total_sectors
+ s
->l1_entry_sectors
- 1)
417 / s
->l1_entry_sectors
;
418 s
->l1_table_offset
= le64_to_cpu(header
.rgd_offset
) << 9;
419 s
->l1_backup_table_offset
= le64_to_cpu(header
.gd_offset
) << 9;
426 // try to open parent images, if exist
427 if (vmdk_parent_open(bs
, filename
) != 0)
429 // write the CID once after the image creation
430 s
->parent_cid
= vmdk_read_cid(bs
,1);
435 /* read the L1 table */
436 l1_size
= s
->l1_size
* sizeof(uint32_t);
437 s
->l1_table
= qemu_malloc(l1_size
);
440 if (bdrv_pread(s
->hd
, s
->l1_table_offset
, s
->l1_table
, l1_size
) != l1_size
)
442 for(i
= 0; i
< s
->l1_size
; i
++) {
443 le32_to_cpus(&s
->l1_table
[i
]);
446 if (s
->l1_backup_table_offset
) {
447 s
->l1_backup_table
= qemu_malloc(l1_size
);
448 if (!s
->l1_backup_table
)
450 if (bdrv_pread(s
->hd
, s
->l1_backup_table_offset
, s
->l1_backup_table
, l1_size
) != l1_size
)
452 for(i
= 0; i
< s
->l1_size
; i
++) {
453 le32_to_cpus(&s
->l1_backup_table
[i
]);
457 s
->l2_cache
= qemu_malloc(s
->l2_size
* L2_CACHE_SIZE
* sizeof(uint32_t));
462 qemu_free(s
->l1_backup_table
);
463 qemu_free(s
->l1_table
);
464 qemu_free(s
->l2_cache
);
469 static uint64_t get_cluster_offset(BlockDriverState
*bs
, VmdkMetaData
*m_data
,
470 uint64_t offset
, int allocate
);
472 static int get_whole_cluster(BlockDriverState
*bs
, uint64_t cluster_offset
,
473 uint64_t offset
, int allocate
)
475 uint64_t parent_cluster_offset
;
476 BDRVVmdkState
*s
= bs
->opaque
;
477 uint8_t whole_grain
[s
->cluster_sectors
*512]; // 128 sectors * 512 bytes each = grain size 64KB
479 // we will be here if it's first write on non-exist grain(cluster).
480 // try to read from parent image, if exist
481 if (s
->hd
->backing_hd
) {
482 BDRVVmdkState
*ps
= s
->hd
->backing_hd
->opaque
;
484 if (!vmdk_is_cid_valid(bs
))
487 parent_cluster_offset
= get_cluster_offset(s
->hd
->backing_hd
, NULL
, offset
, allocate
);
489 if (parent_cluster_offset
) {
490 BDRVVmdkState
*act_s
= activeBDRV
.hd
->opaque
;
492 if (bdrv_pread(ps
->hd
, parent_cluster_offset
, whole_grain
, ps
->cluster_sectors
*512) != ps
->cluster_sectors
*512)
495 //Write grain only into the active image
496 if (bdrv_pwrite(act_s
->hd
, activeBDRV
.cluster_offset
<< 9, whole_grain
, sizeof(whole_grain
)) != sizeof(whole_grain
))
503 static int vmdk_L2update(BlockDriverState
*bs
, VmdkMetaData
*m_data
)
505 BDRVVmdkState
*s
= bs
->opaque
;
507 /* update L2 table */
508 if (bdrv_pwrite(s
->hd
, ((int64_t)m_data
->l2_offset
* 512) + (m_data
->l2_index
* sizeof(m_data
->offset
)),
509 &(m_data
->offset
), sizeof(m_data
->offset
)) != sizeof(m_data
->offset
))
511 /* update backup L2 table */
512 if (s
->l1_backup_table_offset
!= 0) {
513 m_data
->l2_offset
= s
->l1_backup_table
[m_data
->l1_index
];
514 if (bdrv_pwrite(s
->hd
, ((int64_t)m_data
->l2_offset
* 512) + (m_data
->l2_index
* sizeof(m_data
->offset
)),
515 &(m_data
->offset
), sizeof(m_data
->offset
)) != sizeof(m_data
->offset
))
522 static uint64_t get_cluster_offset(BlockDriverState
*bs
, VmdkMetaData
*m_data
,
523 uint64_t offset
, int allocate
)
525 BDRVVmdkState
*s
= bs
->opaque
;
526 unsigned int l1_index
, l2_offset
, l2_index
;
528 uint32_t min_count
, *l2_table
, tmp
= 0;
529 uint64_t cluster_offset
;
534 l1_index
= (offset
>> 9) / s
->l1_entry_sectors
;
535 if (l1_index
>= s
->l1_size
)
537 l2_offset
= s
->l1_table
[l1_index
];
540 for(i
= 0; i
< L2_CACHE_SIZE
; i
++) {
541 if (l2_offset
== s
->l2_cache_offsets
[i
]) {
542 /* increment the hit count */
543 if (++s
->l2_cache_counts
[i
] == 0xffffffff) {
544 for(j
= 0; j
< L2_CACHE_SIZE
; j
++) {
545 s
->l2_cache_counts
[j
] >>= 1;
548 l2_table
= s
->l2_cache
+ (i
* s
->l2_size
);
552 /* not found: load a new entry in the least used one */
554 min_count
= 0xffffffff;
555 for(i
= 0; i
< L2_CACHE_SIZE
; i
++) {
556 if (s
->l2_cache_counts
[i
] < min_count
) {
557 min_count
= s
->l2_cache_counts
[i
];
561 l2_table
= s
->l2_cache
+ (min_index
* s
->l2_size
);
562 if (bdrv_pread(s
->hd
, (int64_t)l2_offset
* 512, l2_table
, s
->l2_size
* sizeof(uint32_t)) !=
563 s
->l2_size
* sizeof(uint32_t))
566 s
->l2_cache_offsets
[min_index
] = l2_offset
;
567 s
->l2_cache_counts
[min_index
] = 1;
569 l2_index
= ((offset
>> 9) / s
->cluster_sectors
) % s
->l2_size
;
570 cluster_offset
= le32_to_cpu(l2_table
[l2_index
]);
572 if (!cluster_offset
) {
575 // Avoid the L2 tables update for the images that have snapshots.
577 cluster_offset
= bdrv_getlength(s
->hd
);
578 bdrv_truncate(s
->hd
, cluster_offset
+ (s
->cluster_sectors
<< 9));
580 cluster_offset
>>= 9;
581 tmp
= cpu_to_le32(cluster_offset
);
582 l2_table
[l2_index
] = tmp
;
583 // Save the active image state
584 activeBDRV
.cluster_offset
= cluster_offset
;
587 /* First of all we write grain itself, to avoid race condition
588 * that may to corrupt the image.
589 * This problem may occur because of insufficient space on host disk
590 * or inappropriate VM shutdown.
592 if (get_whole_cluster(bs
, cluster_offset
, offset
, allocate
) == -1)
596 m_data
->offset
= tmp
;
597 m_data
->l1_index
= l1_index
;
598 m_data
->l2_index
= l2_index
;
599 m_data
->l2_offset
= l2_offset
;
603 cluster_offset
<<= 9;
604 return cluster_offset
;
607 static int vmdk_is_allocated(BlockDriverState
*bs
, int64_t sector_num
,
608 int nb_sectors
, int *pnum
)
610 BDRVVmdkState
*s
= bs
->opaque
;
611 int index_in_cluster
, n
;
612 uint64_t cluster_offset
;
614 cluster_offset
= get_cluster_offset(bs
, NULL
, sector_num
<< 9, 0);
615 index_in_cluster
= sector_num
% s
->cluster_sectors
;
616 n
= s
->cluster_sectors
- index_in_cluster
;
620 return (cluster_offset
!= 0);
623 static int vmdk_read(BlockDriverState
*bs
, int64_t sector_num
,
624 uint8_t *buf
, int nb_sectors
)
626 BDRVVmdkState
*s
= bs
->opaque
;
627 int index_in_cluster
, n
, ret
;
628 uint64_t cluster_offset
;
630 while (nb_sectors
> 0) {
631 cluster_offset
= get_cluster_offset(bs
, NULL
, sector_num
<< 9, 0);
632 index_in_cluster
= sector_num
% s
->cluster_sectors
;
633 n
= s
->cluster_sectors
- index_in_cluster
;
636 if (!cluster_offset
) {
637 // try to read from parent image, if exist
638 if (s
->hd
->backing_hd
) {
639 if (!vmdk_is_cid_valid(bs
))
641 ret
= bdrv_read(s
->hd
->backing_hd
, sector_num
, buf
, n
);
645 memset(buf
, 0, 512 * n
);
648 if(bdrv_pread(s
->hd
, cluster_offset
+ index_in_cluster
* 512, buf
, n
* 512) != n
* 512)
654 s
->io
.read_byte_counter
+= (uint64_t)(n
*512);
659 static int vmdk_write(BlockDriverState
*bs
, int64_t sector_num
,
660 const uint8_t *buf
, int nb_sectors
)
662 BDRVVmdkState
*s
= bs
->opaque
;
664 int index_in_cluster
, n
;
665 uint64_t cluster_offset
;
666 static int cid_update
= 0;
668 if (sector_num
> bs
->total_sectors
) {
670 "(VMDK) Wrong offset: sector_num=0x%" PRIx64
671 " total_sectors=0x%" PRIx64
"\n",
672 sector_num
, bs
->total_sectors
);
676 while (nb_sectors
> 0) {
677 index_in_cluster
= sector_num
& (s
->cluster_sectors
- 1);
678 n
= s
->cluster_sectors
- index_in_cluster
;
681 cluster_offset
= get_cluster_offset(bs
, &m_data
, sector_num
<< 9, 1);
685 if (bdrv_pwrite(s
->hd
, cluster_offset
+ index_in_cluster
* 512, buf
, n
* 512) != n
* 512)
688 /* update L2 tables */
689 if (vmdk_L2update(bs
, &m_data
) == -1)
695 s
->io
.write_byte_counter
+= (uint64_t)(n
*512);
697 // update CID on the first write every time the virtual disk is opened
699 vmdk_write_cid(bs
, time(NULL
));
706 static int vmdk_create(const char *filename
, int64_t total_size
,
707 const char *backing_file
, int flags
)
711 uint32_t tmp
, magic
, grains
, gd_size
, gt_size
, gt_count
;
712 char *desc_template
=
713 "# Disk DescriptorFile\n"
716 "parentCID=ffffffff\n"
717 "createType=\"monolithicSparse\"\n"
719 "# Extent description\n"
720 "RW %lu SPARSE \"%s\"\n"
722 "# The Disk Data Base \n"
725 "ddb.virtualHWVersion = \"%d\"\n"
726 "ddb.geometry.cylinders = \"%lu\"\n"
727 "ddb.geometry.heads = \"16\"\n"
728 "ddb.geometry.sectors = \"63\"\n"
729 "ddb.adapterType = \"ide\"\n";
731 const char *real_filename
, *temp_str
;
733 /* XXX: add support for backing file */
735 return vmdk_snapshot_create(filename
, backing_file
);
738 fd
= open(filename
, O_WRONLY
| O_CREAT
| O_TRUNC
| O_BINARY
| O_LARGEFILE
,
742 magic
= cpu_to_be32(VMDK4_MAGIC
);
743 memset(&header
, 0, sizeof(header
));
744 header
.version
= cpu_to_le32(1);
745 header
.flags
= cpu_to_le32(3); /* ?? */
746 header
.capacity
= cpu_to_le64(total_size
);
747 header
.granularity
= cpu_to_le64(128);
748 header
.num_gtes_per_gte
= cpu_to_le32(512);
750 grains
= (total_size
+ header
.granularity
- 1) / header
.granularity
;
751 gt_size
= ((header
.num_gtes_per_gte
* sizeof(uint32_t)) + 511) >> 9;
752 gt_count
= (grains
+ header
.num_gtes_per_gte
- 1) / header
.num_gtes_per_gte
;
753 gd_size
= (gt_count
* sizeof(uint32_t) + 511) >> 9;
755 header
.desc_offset
= 1;
756 header
.desc_size
= 20;
757 header
.rgd_offset
= header
.desc_offset
+ header
.desc_size
;
758 header
.gd_offset
= header
.rgd_offset
+ gd_size
+ (gt_size
* gt_count
);
759 header
.grain_offset
=
760 ((header
.gd_offset
+ gd_size
+ (gt_size
* gt_count
) +
761 header
.granularity
- 1) / header
.granularity
) *
764 header
.desc_offset
= cpu_to_le64(header
.desc_offset
);
765 header
.desc_size
= cpu_to_le64(header
.desc_size
);
766 header
.rgd_offset
= cpu_to_le64(header
.rgd_offset
);
767 header
.gd_offset
= cpu_to_le64(header
.gd_offset
);
768 header
.grain_offset
= cpu_to_le64(header
.grain_offset
);
770 header
.check_bytes
[0] = 0xa;
771 header
.check_bytes
[1] = 0x20;
772 header
.check_bytes
[2] = 0xd;
773 header
.check_bytes
[3] = 0xa;
775 /* write all the data */
776 write(fd
, &magic
, sizeof(magic
));
777 write(fd
, &header
, sizeof(header
));
779 ftruncate(fd
, header
.grain_offset
<< 9);
781 /* write grain directory */
782 lseek(fd
, le64_to_cpu(header
.rgd_offset
) << 9, SEEK_SET
);
783 for (i
= 0, tmp
= header
.rgd_offset
+ gd_size
;
784 i
< gt_count
; i
++, tmp
+= gt_size
)
785 write(fd
, &tmp
, sizeof(tmp
));
787 /* write backup grain directory */
788 lseek(fd
, le64_to_cpu(header
.gd_offset
) << 9, SEEK_SET
);
789 for (i
= 0, tmp
= header
.gd_offset
+ gd_size
;
790 i
< gt_count
; i
++, tmp
+= gt_size
)
791 write(fd
, &tmp
, sizeof(tmp
));
793 /* compose the descriptor */
794 real_filename
= filename
;
795 if ((temp_str
= strrchr(real_filename
, '\\')) != NULL
)
796 real_filename
= temp_str
+ 1;
797 if ((temp_str
= strrchr(real_filename
, '/')) != NULL
)
798 real_filename
= temp_str
+ 1;
799 if ((temp_str
= strrchr(real_filename
, ':')) != NULL
)
800 real_filename
= temp_str
+ 1;
801 sprintf(desc
, desc_template
, time(NULL
), (unsigned long)total_size
,
802 real_filename
, (flags
& BLOCK_FLAG_COMPAT6
? 6 : 4), total_size
/ (63 * 16));
804 /* write the descriptor */
805 lseek(fd
, le64_to_cpu(header
.desc_offset
) << 9, SEEK_SET
);
806 write(fd
, desc
, strlen(desc
));
812 static void vmdk_close(BlockDriverState
*bs
)
814 BDRVVmdkState
*s
= bs
->opaque
;
816 qemu_free(s
->l1_table
);
817 qemu_free(s
->l2_cache
);
819 // try to close parent image, if exist
820 vmdk_parent_close(s
->hd
);
823 static void vmdk_flush(BlockDriverState
*bs
)
825 BDRVVmdkState
*s
= bs
->opaque
;
829 BlockDriver bdrv_vmdk
= {
831 sizeof(BDRVVmdkState
),