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block: Add blk_remove_bs()

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This function removes the BlockDriverState associated with the given
BlockBackend from that BB and sets the BDS pointer in the BB to NULL.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Max Reitz
2015-11-11 16:22:46 +01:00
committed by Kevin Wolf
parent 9f4ed6fbd2
commit 1c95f7e1af
2 changed files with 13 additions and 0 deletions
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block/block-backend.c
+12
View File
@@ -333,6 +333,18 @@ void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk)
}
}
/*
* Disassociates the currently associated BlockDriverState from @blk.
*/
void blk_remove_bs(BlockBackend *blk)
{
blk_update_root_state(blk);
blk->bs->blk = NULL;
bdrv_unref(blk->bs);
blk->bs = NULL;
}
/*
* Associates a new BlockDriverState with @blk.
*/
include/sysemu/block-backend.h
+1
View File
@@ -72,6 +72,7 @@ BlockBackend *blk_by_name(const char *name);
BlockBackend *blk_next(BlockBackend *blk);
BlockDriverState *blk_bs(BlockBackend *blk);
void blk_remove_bs(BlockBackend *blk);
void blk_insert_bs(BlockBackend *blk, BlockDriverState *bs);
void blk_hide_on_behalf_of_hmp_drive_del(BlockBackend *blk);