diff options
Diffstat (limited to 'include/block/block_int.h')
| -rw-r--r-- | include/block/block_int.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/block/block_int.h b/include/block/block_int.h index 6c0927bce3..888b7f7bff 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -204,6 +204,37 @@ struct BlockDriver { int coroutine_fn (*bdrv_co_pdiscard)(BlockDriverState *bs, int64_t offset, int bytes); + /* Map [offset, offset + nbytes) range onto a child of @bs to copy from, + * and invoke bdrv_co_copy_range_from(child, ...), or invoke + * bdrv_co_copy_range_to() if @bs is the leaf child to copy data from. + * + * See the comment of bdrv_co_copy_range for the parameter and return value + * semantics. + */ + int coroutine_fn (*bdrv_co_copy_range_from)(BlockDriverState *bs, + BdrvChild *src, + uint64_t offset, + BdrvChild *dst, + uint64_t dst_offset, + uint64_t bytes, + BdrvRequestFlags flags); + + /* Map [offset, offset + nbytes) range onto a child of bs to copy data to, + * and invoke bdrv_co_copy_range_to(child, src, ...), or perform the copy + * operation if @bs is the leaf and @src has the same BlockDriver. Return + * -ENOTSUP if @bs is the leaf but @src has a different BlockDriver. + * + * See the comment of bdrv_co_copy_range for the parameter and return value + * semantics. + */ + int coroutine_fn (*bdrv_co_copy_range_to)(BlockDriverState *bs, + BdrvChild *src, + uint64_t src_offset, + BdrvChild *dst, + uint64_t dst_offset, + uint64_t bytes, + BdrvRequestFlags flags); + /* * Building block for bdrv_block_status[_above] and * bdrv_is_allocated[_above]. The driver should answer only @@ -1102,4 +1133,11 @@ void bdrv_dec_in_flight(BlockDriverState *bs); void blockdev_close_all_bdrv_states(void); +int coroutine_fn bdrv_co_copy_range_from(BdrvChild *src, uint64_t src_offset, + BdrvChild *dst, uint64_t dst_offset, + uint64_t bytes, BdrvRequestFlags flags); +int coroutine_fn bdrv_co_copy_range_to(BdrvChild *src, uint64_t src_offset, + BdrvChild *dst, uint64_t dst_offset, + uint64_t bytes, BdrvRequestFlags flags); + #endif /* BLOCK_INT_H */ |