[CRIU] [PATCH 0/2] Introduce v1.1 image format

[Andrew Vagin]

On Wed, Apr 08, 2015 at 04:35:57PM +0300, Pavel Emelyanov wrote:
> Hi,
> 
> Right now we have too many criu-specific file types -- effectively
> every new image file we add is a new "type", we invent a new magic
> number for it and put only it into the header.
> 
> One of the difficulty with this approach is that we can't nicely
> teach the "file" utility to spot CRIU-specific files. Too many
> magic should be added and we would have to add new magic numbers
> for every new image type we introduce.
> 
> So the proposal is to turn all image files into one format. For
> compatibility reasons the inventory file will have to remain
> intact. But for the rest the common 4-bytes magic is introduced.
> The old-style magic follows one.
> 
> There are two more exceptions from this rule -- stats and irmap
> cache files. These two are not images, so these are not changed.
> (Maybe it's worth joining them under "criu service file" magic?)
> 
> Older versions of CRIU will not be able to restore from v1.1, but
> that's OK. If we will need it, converting formats would be quite
> easy. Newer CRIU will still understand v1 format, so no crit-based
> conversion required.
>

Acked-by: Andrew Vagin <avagin at odin.com>

Thanks
 
> -- Pavel
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