Commit 6ebdcee2 authored by Committed by Kevin WolfBrowse files
block: add support functions for live commit, to find and delete images.
Add bdrv_find_overlay(), and bdrv_drop_intermediate(). bdrv_find_overlay(): given 'bs' and the active (topmost) BDS of an image chain, find the image that is the immediate top of 'bs' bdrv_drop_intermediate(): Given 3 BDS (active, top, base), drop images above base up to and including top, and set base to be the backing file of top's overlay node. E.g., this converts: bottom <- base <- intermediate <- top <- active to bottom <- base <- active Signed-off-by: Jeff Cody <firstname.lastname@example.org> Reviewed-by: Eric Blake <email@example.com> Signed-off-by: Kevin Wolf <firstname.lastname@example.org>