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authorManos Pitsidianakis <el13635@mail.ntua.gr>2017-07-13 18:30:28 +0300
committerKevin Wolf <kwolf@redhat.com>2017-09-04 18:31:13 +0200
commitf7cc69b326850c34db5dca2f9f74898cd181f43a (patch)
treead7fd5018f1a5f3c903ba3ada403fc230dab4a6b /block/io.c
parentd8e12cd3227f0cb3b5558563f094088cfefb8f21 (diff)
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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.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/block/io.c b/block/io.c
index 2600381..4378ae4 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