diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2015-09-17 13:01:50 +0200 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2015-10-16 15:34:29 +0200 |
| commit | a2d6190048d01c7012ab4fd6a2558f435b7b2fe8 (patch) | |
| tree | c6caee1d5c509be15b11eb031694f198aca809dc | |
| parent | 439db28cf9d4c29c9a97040bc8e08f047ba7e0af (diff) | |
block-backend: Add blk_set_bs()
It allows changing the BlockDriverState that a BlockBackend points to.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
| -rw-r--r-- | block/block-backend.c | 17 | ||||
| -rw-r--r-- | include/block/block_int.h | 2 |
2 files changed, 19 insertions, 0 deletions
diff --git a/block/block-backend.c b/block/block-backend.c index c2e873292a..225655126e 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -239,6 +239,23 @@ BlockDriverState *blk_bs(BlockBackend *blk) } /* + * Changes the BlockDriverState attached to @blk + */ +void blk_set_bs(BlockBackend *blk, BlockDriverState *bs) +{ + bdrv_ref(bs); + + if (blk->bs) { + blk->bs->blk = NULL; + bdrv_unref(blk->bs); + } + assert(bs->blk == NULL); + + blk->bs = bs; + bs->blk = blk; +} + +/* * Return @blk's DriveInfo if any, else null. */ DriveInfo *blk_legacy_dinfo(BlockBackend *blk) diff --git a/include/block/block_int.h b/include/block/block_int.h index 4598101086..cfcae52d7d 100644 --- a/include/block/block_int.h +++ b/include/block/block_int.h @@ -659,6 +659,8 @@ void backup_start(BlockDriverState *bs, BlockDriverState *target, BlockCompletionFunc *cb, void *opaque, Error **errp); +void blk_set_bs(BlockBackend *blk, BlockDriverState *bs); + void blk_dev_change_media_cb(BlockBackend *blk, bool load); bool blk_dev_has_removable_media(BlockBackend *blk); void blk_dev_eject_request(BlockBackend *blk, bool force); |