Use the child access functions in the block status inquiry functions as appropriate.
Signed-off-by: Max Reitz <mre...@redhat.com> --- block/io.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/block/io.c b/block/io.c index 73ade04834..53aabf86b5 100644 --- a/block/io.c +++ b/block/io.c @@ -2150,11 +2150,12 @@ static int coroutine_fn bdrv_co_block_status(BlockDriverState *bs, if (ret & (BDRV_BLOCK_DATA | BDRV_BLOCK_ZERO)) { ret |= BDRV_BLOCK_ALLOCATED; } else if (want_zero) { + BlockDriverState *cow_bs = bdrv_filtered_cow_bs(bs); + if (bdrv_unallocated_blocks_are_zero(bs)) { ret |= BDRV_BLOCK_ZERO; - } else if (bs->backing) { - BlockDriverState *bs2 = bs->backing->bs; - int64_t size2 = bdrv_getlength(bs2); + } else if (cow_bs) { + int64_t size2 = bdrv_getlength(cow_bs); if (size2 >= 0 && offset >= size2) { ret |= BDRV_BLOCK_ZERO; @@ -2220,7 +2221,7 @@ static int coroutine_fn bdrv_co_block_status_above(BlockDriverState *bs, bool first = true; assert(bs != base); - for (p = bs; p != base; p = backing_bs(p)) { + for (p = bs; p != base; p = bdrv_filtered_bs(p)) { ret = bdrv_co_block_status(p, want_zero, offset, bytes, pnum, map, file); if (ret < 0) { @@ -2306,7 +2307,7 @@ int bdrv_block_status_above(BlockDriverState *bs, BlockDriverState *base, int bdrv_block_status(BlockDriverState *bs, int64_t offset, int64_t bytes, int64_t *pnum, int64_t *map, BlockDriverState **file) { - return bdrv_block_status_above(bs, backing_bs(bs), + return bdrv_block_status_above(bs, bdrv_filtered_bs(bs), offset, bytes, pnum, map, file); } @@ -2316,9 +2317,9 @@ int coroutine_fn bdrv_is_allocated(BlockDriverState *bs, int64_t offset, int ret; int64_t dummy; - ret = bdrv_common_block_status_above(bs, backing_bs(bs), false, offset, - bytes, pnum ? pnum : &dummy, NULL, - NULL); + ret = bdrv_common_block_status_above(bs, bdrv_filtered_bs(bs), false, + offset, bytes, pnum ? pnum : &dummy, + NULL, NULL); if (ret < 0) { return ret; } @@ -2372,7 +2373,7 @@ int bdrv_is_allocated_above(BlockDriverState *top, n = pnum_inter; } - intermediate = backing_bs(intermediate); + intermediate = bdrv_filtered_bs(intermediate); } *pnum = n; -- 2.21.0