Revision a8842e6d block/vmdk.c
| b/block/vmdk.c | ||
|---|---|---|
| 529 | 529 |
static int vmdk_open_desc_file(BlockDriverState *bs, int flags, |
| 530 | 530 |
uint64_t desc_offset, Error **errp); |
| 531 | 531 |
|
| 532 |
static char *vmdk_read_desc(BlockDriverState *file, uint64_t desc_offset, |
|
| 533 |
Error **errp) |
|
| 534 |
{
|
|
| 535 |
int64_t size; |
|
| 536 |
char *buf; |
|
| 537 |
int ret; |
|
| 538 |
|
|
| 539 |
size = bdrv_getlength(file); |
|
| 540 |
if (size < 0) {
|
|
| 541 |
error_setg_errno(errp, -size, "Could not access file"); |
|
| 542 |
return NULL; |
|
| 543 |
} |
|
| 544 |
|
|
| 545 |
size = MIN(size, 1 << 20); /* avoid unbounded allocation */ |
|
| 546 |
buf = g_malloc0(size + 1); |
|
| 547 |
|
|
| 548 |
ret = bdrv_pread(file, desc_offset, buf, size); |
|
| 549 |
if (ret < 0) {
|
|
| 550 |
error_setg_errno(errp, -ret, "Could not read from file"); |
|
| 551 |
g_free(buf); |
|
| 552 |
return NULL; |
|
| 553 |
} |
|
| 554 |
|
|
| 555 |
return buf; |
|
| 556 |
} |
|
| 557 |
|
|
| 532 | 558 |
static int vmdk_open_vmdk4(BlockDriverState *bs, |
| 533 | 559 |
BlockDriverState *file, |
| 534 | 560 |
int flags, Error **errp) |
| ... | ... | |
| 823 | 849 |
uint64_t desc_offset, Error **errp) |
| 824 | 850 |
{
|
| 825 | 851 |
int ret; |
| 826 |
char *buf = NULL;
|
|
| 852 |
char *buf; |
|
| 827 | 853 |
char ct[128]; |
| 828 | 854 |
BDRVVmdkState *s = bs->opaque; |
| 829 |
int64_t size; |
|
| 830 | 855 |
|
| 831 |
size = bdrv_getlength(bs->file);
|
|
| 832 |
if (size < 0) {
|
|
| 856 |
buf = vmdk_read_desc(bs->file, desc_offset, errp);
|
|
| 857 |
if (!buf) {
|
|
| 833 | 858 |
return -EINVAL; |
| 834 |
} |
|
| 835 |
|
|
| 836 |
size = MIN(size, 1 << 20); /* avoid unbounded allocation */ |
|
| 837 |
buf = g_malloc0(size + 1); |
|
| 838 |
|
|
| 839 |
ret = bdrv_pread(bs->file, desc_offset, buf, size); |
|
| 840 |
if (ret < 0) {
|
|
| 841 | 859 |
goto exit; |
| 842 | 860 |
} |
| 861 |
|
|
| 843 | 862 |
if (vmdk_parse_description(buf, "createType", ct, sizeof(ct))) {
|
| 844 | 863 |
ret = -EMEDIUMTYPE; |
| 845 | 864 |
goto exit; |
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