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raw: Implement copy offloading 

Just pass down to ->file.

Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20180601092648.24614-4-famz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Fam Zheng 2018-06-01 17:26:41 +08:00 committed by Stefan Hajnoczi
parent 3844553852
commit 72d219e2f9
1 changed files with 32 additions and 0 deletions
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32
block/raw-format.c
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@ -497,6 +497,36 @@ static int raw_probe_geometry(BlockDriverState *bs, HDGeometry *geo)
return bdrv_probe_geometry(bs->file->bs, geo);
}
static int coroutine_fn raw_co_copy_range_from(BlockDriverState *bs,
BdrvChild *src, uint64_t src_offset,
BdrvChild *dst, uint64_t dst_offset,
uint64_t bytes, BdrvRequestFlags flags)
{
int ret;
ret = raw_adjust_offset(bs, &src_offset, bytes, false);
if (ret) {
return ret;
}
return bdrv_co_copy_range_from(bs->file, src_offset, dst, dst_offset,
bytes, flags);
}
static int coroutine_fn raw_co_copy_range_to(BlockDriverState *bs,
BdrvChild *src, uint64_t src_offset,
BdrvChild *dst, uint64_t dst_offset,
uint64_t bytes, BdrvRequestFlags flags)
{
int ret;
ret = raw_adjust_offset(bs, &dst_offset, bytes, true);
if (ret) {
return ret;
}
return bdrv_co_copy_range_to(src, src_offset, bs->file, dst_offset, bytes,
flags);
}
BlockDriver bdrv_raw = {
.format_name = "raw",
.instance_size = sizeof(BDRVRawState),
@ -513,6 +543,8 @@ BlockDriver bdrv_raw = {
.bdrv_co_pwrite_zeroes = &raw_co_pwrite_zeroes,
.bdrv_co_pdiscard = &raw_co_pdiscard,
.bdrv_co_block_status = &raw_co_block_status,
.bdrv_co_copy_range_from = &raw_co_copy_range_from,
.bdrv_co_copy_range_to = &raw_co_copy_range_to,
.bdrv_truncate = &raw_truncate,
.bdrv_getlength = &raw_getlength,
.has_variable_length = true,