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block: introduce blk_replace_bs

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Add function to change bs inside blk.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20210824083856.17408-3-vsementsov@virtuozzo.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
This commit is contained in:
Vladimir Sementsov-Ogievskiy 2021-08-24 11:38:24 +03:00 committed by Hanna Reitz
parent bd8f4c42c8
commit ed089506ee
2 changed files with 9 additions and 0 deletions
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8
block/block-backend.c
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@ -869,6 +869,14 @@ int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp)
return 0;
}
/*
* Change BlockDriverState associated with @blk.
*/
int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp)
{
return bdrv_replace_child_bs(blk->root, new_bs, errp);
}
/*
* Sets the permission bitmasks that the user of the BlockBackend needs.
*/

1
include/sysemu/block-backend.h
View File

@ -102,6 +102,7 @@ BlockBackend *blk_by_public(BlockBackendPublic *public);
BlockDriverState *blk_bs(BlockBackend *blk);
void blk_remove_bs(BlockBackend *blk);
int blk_insert_bs(BlockBackend *blk, BlockDriverState *bs, Error **errp);
int blk_replace_bs(BlockBackend *blk, BlockDriverState *new_bs, Error **errp);
bool bdrv_has_blk(BlockDriverState *bs);
bool bdrv_is_root_node(BlockDriverState *bs);
int blk_set_perm(BlockBackend *blk, uint64_t perm, uint64_t shared_perm,