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vmdk: Implement .bdrv_has_zero_init 

Depending on the subformat, has_zero_init queries underlying storage for
flat extent. If it has a flat extent and its underlying storage doesn't
have zero init, return 0. Otherwise return 1.

Aligns the operator assignments.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2013-07-01 11:33:17 +08:00 committed by Stefan Hajnoczi
parent ab8bf29078
commit da7a50f938
1 changed files with 32 additions and 14 deletions
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46
block/vmdk.c
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@ -1724,6 +1724,23 @@ static int64_t vmdk_get_allocated_file_size(BlockDriverState *bs)
return ret;
}
static int vmdk_has_zero_init(BlockDriverState *bs)
{
int i;
BDRVVmdkState *s = bs->opaque;
/* If has a flat extent and its underlying storage doesn't have zero init,
* return 0. */
for (i = 0; i < s->num_extents; i++) {
if (s->extents[i].flat) {
if (!bdrv_has_zero_init(s->extents[i].file)) {
return 0;
}
}
}
return 1;
}
static QEMUOptionParameter vmdk_create_options[] = {
{
.name = BLOCK_OPT_SIZE,
@ -1762,21 +1779,22 @@ static QEMUOptionParameter vmdk_create_options[] = {
};
static BlockDriver bdrv_vmdk = {
.format_name = "vmdk",
.instance_size = sizeof(BDRVVmdkState),
.bdrv_probe = vmdk_probe,
.bdrv_open = vmdk_open,
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_read = vmdk_co_read,
.bdrv_write = vmdk_co_write,
.bdrv_co_write_zeroes = vmdk_co_write_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
.bdrv_co_flush_to_disk = vmdk_co_flush,
.bdrv_co_is_allocated = vmdk_co_is_allocated,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.format_name = "vmdk",
.instance_size = sizeof(BDRVVmdkState),
.bdrv_probe = vmdk_probe,
.bdrv_open = vmdk_open,
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_read = vmdk_co_read,
.bdrv_write = vmdk_co_write,
.bdrv_co_write_zeroes = vmdk_co_write_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,
.bdrv_co_flush_to_disk = vmdk_co_flush,
.bdrv_co_is_allocated = vmdk_co_is_allocated,
.bdrv_get_allocated_file_size = vmdk_get_allocated_file_size,
.bdrv_has_zero_init = vmdk_has_zero_init,
.create_options = vmdk_create_options,
.create_options = vmdk_create_options,
};
static void bdrv_vmdk_init(void)