Re: [Xen-devel] VM checkpoint image format

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Sun, 2013-12-22 at 15:29 +0000, Andrew Cooper wrote:
> On 21/12/2013 16:31, Prateek Sharma wrote:
> > Hello all,
> >     Is the VM-save image format specified anywhere? (the file written
> > to by xc_domain_save). I am looking for what fields are saved in what
> > order.
> >     Or is the xc_domain_save function itself the specification? Can I
> > change the order of fields saved (thus changing the on-disk image
> > format) and expect no breakages? Ofcourse, I will need to change the
> > xc_domain_restore function as well.
> >
> > Thanks!
> > --Prateek
> 
> There is no documentation that I am aware of, other than the code
> itself,

There is a big comment in tools/libxc/xg_save_restore.h which describes
the migration protocol. The save format is basically just a single pass
of that.

Ian


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