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vmdk: Implement .bdrv_write_compressed

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Add a wrapper function to support "compressed" path in qemu-img convert.
Only support streamOptimized subformat case for now (num_extents == 1
and extent compression is true).

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2014-05-06 21:08:44 +08:00 committed by Stefan Hajnoczi
parent 85f49cad87
commit ba0ad89e2c
1 changed files with 14 additions and 0 deletions
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14
block/vmdk.c
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@ -1496,6 +1496,19 @@ static coroutine_fn int vmdk_co_write(BlockDriverState *bs, int64_t sector_num,
return ret;
}
static int vmdk_write_compressed(BlockDriverState *bs,
int64_t sector_num,
const uint8_t *buf,
int nb_sectors)
{
BDRVVmdkState *s = bs->opaque;
if (s->num_extents == 1 && s->extents[0].compressed) {
return vmdk_write(bs, sector_num, buf, nb_sectors, false, false);
} else {
return -ENOTSUP;
}
}
static int coroutine_fn vmdk_co_write_zeroes(BlockDriverState *bs,
int64_t sector_num,
int nb_sectors,
@ -2109,6 +2122,7 @@ static BlockDriver bdrv_vmdk = {
.bdrv_reopen_prepare = vmdk_reopen_prepare,
.bdrv_read = vmdk_co_read,
.bdrv_write = vmdk_co_write,
.bdrv_write_compressed = vmdk_write_compressed,
.bdrv_co_write_zeroes = vmdk_co_write_zeroes,
.bdrv_close = vmdk_close,
.bdrv_create = vmdk_create,