From 4ce786914b745a144a9eda1ea33f3ff98328c527 Mon Sep 17 00:00:00 2001 From: Peter Lieven Date: Thu, 24 Oct 2013 12:06:54 +0200 Subject: block: add wrappers for logical block provisioning information This adds 2 wrappers to read the unallocated_blocks_are_zero and can_write_zeroes_with_unmap info from the BDI. The wrappers are required to check for the existence of a backing_hd and if the devices are opened with the correct flags. Reviewed-by: Eric Blake Signed-off-by: Peter Lieven Signed-off-by: Stefan Hajnoczi --- include/block/block.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/block/block.h b/include/block/block.h index 9c76967104..803c5caceb 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -344,6 +344,8 @@ int bdrv_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); int bdrv_co_discard(BlockDriverState *bs, int64_t sector_num, int nb_sectors); int bdrv_has_zero_init_1(BlockDriverState *bs); int bdrv_has_zero_init(BlockDriverState *bs); +bool bdrv_unallocated_blocks_are_zero(BlockDriverState *bs); +bool bdrv_can_write_zeroes_with_unmap(BlockDriverState *bs); int64_t bdrv_get_block_status(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum); int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, -- cgit v1.2.3-55-g7522