[Qemu-devel] Fate of the read-only block drivers?

[Christoph Hellwig <hch@lst.de>]

Currently we have four very simple, read-only block drivers in the
tree:

 - cloop:
	This one is known buggy for non-trivial use and didn't get
	any chance but the usual API changes and cleanup sweeps
	since it was commited in 2004.

 - dmg:
	This one is really grotty and by auditing the code and comparing
	it to dmg2img completely buggy for non-compressed chunks.  It's
	also missing lots of the features in modern dmg image.  Also
	there's no creation tool for Linux.  No non-trivial commits
	since the initial import in 2004.

 - bochs:
	There is an bximage tools to actually create images for it,
	but not to actually add any content to them.  It had one
	non-trivial commit in 2007 to add support for growable formats
	since it's initial commit in 2004.

 - parallels:
	I can't find any way to actually create the image except with
	the parallels image tool which seems to require a commercial
	parallels license.
	No non-trivial commits since the initial import in 2007.

At this point I'm not sure if it's worth bothering to fix these up,
as they're bitrotted and except for cloop there's no reasy way to
actually create test images for them.

Any good reason to keep them, and if yes any good idea for a test plan
to keep them working?