diff options
| author | Manos Pitsidianakis <el13635@mail.ntua.gr> | 2017-07-13 18:30:28 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-09-04 18:31:13 +0200 |
| commit | f7cc69b326850c34db5dca2f9f74898cd181f43a (patch) | |
| tree | ad7fd5018f1a5f3c903ba3ada403fc230dab4a6b /block/io.c | |
| parent | d8e12cd3227f0cb3b5558563f094088cfefb8f21 (diff) | |
| download | qemu-f7cc69b326850c34db5dca2f9f74898cd181f43a.tar.gz | |
block: add default implementations for bdrv_co_get_block_status()
bdrv_co_get_block_status_from_file() and
bdrv_co_get_block_status_from_backing() set *file to bs->file and
bs->backing respectively, so that bdrv_co_get_block_status() can recurse
to them. Future block drivers won't have to duplicate code to implement
this.
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Manos Pitsidianakis <el13635@mail.ntua.gr>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'block/io.c')
| -rw-r--r-- | block/io.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/block/io.c b/block/io.c index 26003814eb..4378ae4c7d 100644 --- a/block/io.c +++ b/block/io.c @@ -1714,6 +1714,32 @@ typedef struct BdrvCoGetBlockStatusData { bool done; } BdrvCoGetBlockStatusData; +int64_t coroutine_fn bdrv_co_get_block_status_from_file(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, + int *pnum, + BlockDriverState **file) +{ + assert(bs->file && bs->file->bs); + *pnum = nb_sectors; + *file = bs->file->bs; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | + (sector_num << BDRV_SECTOR_BITS); +} + +int64_t coroutine_fn bdrv_co_get_block_status_from_backing(BlockDriverState *bs, + int64_t sector_num, + int nb_sectors, + int *pnum, + BlockDriverState **file) +{ + assert(bs->backing && bs->backing->bs); + *pnum = nb_sectors; + *file = bs->backing->bs; + return BDRV_BLOCK_RAW | BDRV_BLOCK_OFFSET_VALID | + (sector_num << BDRV_SECTOR_BITS); +} + /* * Returns the allocation status of the specified sectors. * Drivers not implementing the functionality are assumed to not support |