diff options
| author | Fam Zheng <famz@redhat.com> | 2015-06-08 13:56:07 +0800 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2015-07-02 10:03:50 +0100 |
| commit | ba3f0e2545c365ebe1dbddb0e53058710d41881e (patch) | |
| tree | 39315c57080955d17bb4be1ec3053faec12a842c /include/block | |
| parent | e0cf11f31c24cfb17f44ed46c254d84c78e7f6e9 (diff) | |
block: Add bdrv_get_block_status_above
Like bdrv_is_allocated_above, this function follows the backing chain until seeing
BDRV_BLOCK_ALLOCATED. Base is not included.
Reimplement bdrv_is_allocated on top.
[Initialized bdrv_co_get_block_status_above() ret to 0 to silence
mingw64 compiler warning about the unitialized variable. assert(bs !=
base) prevents that case but I suppose the program could be compiled
with -DNDEBUG.
--Stefan]
Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include/block')
| -rw-r--r-- | include/block/block.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/block/block.h b/include/block/block.h index 07bb724f7d..06e4137008 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -372,6 +372,10 @@ 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); +int64_t bdrv_get_block_status_above(BlockDriverState *bs, + BlockDriverState *base, + int64_t sector_num, + int nb_sectors, int *pnum); int bdrv_is_allocated(BlockDriverState *bs, int64_t sector_num, int nb_sectors, int *pnum); int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base, |