Re: [PATCH 0/1] liveupdate: Add internal APIs for file preservation

[Mike Rapoport <rppt@kernel.org>]

Hi Sami,

On Sat, Jun 13, 2026 at 01:25:19AM +0000, Samiullah Khawaja wrote:
> Live update orchestrator file handlers depend on the preservation of
> other files. To make sure that the dependency is preserved, the file
> handlers needs to fetch the preservation token of the preserved
> dependency. Similarly during restore, a file handler wants to fetch the
> restored file of the dependency.

This will have to wait until -rc1 is out.
I'm thinking about taking it to a branch in the liveupdate tree and keeping
there until a patchset that uses it, be it iommu or kvm matures.
 
> There are two known usecases of this,
> 
> - VFIO-Cdev preservation requires the preservation of iommufd. This is
>   required by the IOMMU preservation series:
>   https://lore.kernel.org/all/20260427175633.1978233-1-skhawaja@google.com/
> - guest_memfd preservation requires the preservation of kvmfd. This is
>   required by the guest_memfd preservation series:
>   https://lore.kernel.org/all/20ae20f9d1a198b289444ebb4c824314cbba1bcf.1780676742.git.tarunsahu@google.com/

-- 
Sincerely yours,
Mike.