Re: [Qemu-devel] [PATCH V6 3/3] Add backing drive while performing backup.

[Kevin Wolf]

Am 23.07.2013 um 00:09 hat Ian Main geschrieben:
> This patch adds the original source drive as a backing drive to our target
> image so that the target image will appear complete during backup.  This
> is especially useful for SYNC_MODE_NONE as it allows export via NBD to
> have a complete point-in-time snapshot available for export.
> 
> Signed-off-by: Ian Main <address@hidden>

This isn't directly usable, right?

Let's complettely leave it out for now, it's incomplete and most likely
wrong, and that's not easy to fix right. I expect that Fam's patches (at
which I have to take a look yet) offer a more complete solution for
this, but I wouldn't consider any change that allows users to access the
backup target for 1.6, because the user can do all sorts of interesting
things with it then, which we probably don't check for in most cases.

Kevin