linux-kernel - Re: [PATCH v7 05/22] liveupdate: luo

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Message-ID: <aSMX_pnUShilO_sj@kernel.org>
Date: Sun, 23 Nov 2025 16:19:42 +0200
From: Mike Rapoport <rppt@...nel.org>
To: Pasha Tatashin <pasha.tatashin@...een.com>
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Subject: Re: [PATCH v7 05/22] liveupdate: luo_core: add user interface

On Sat, Nov 22, 2025 at 05:23:32PM -0500, Pasha Tatashin wrote:
> Introduce the user-space interface for the Live Update Orchestrator
> via ioctl commands, enabling external control over the live update
> process and management of preserved resources.
> 
> The idea is that there is going to be a single userspace agent driving
> the live update, therefore, only a single process can ever hold this
> device opened at a time.
> 
> The following ioctl commands are introduced:
> 
> LIVEUPDATE_IOCTL_CREATE_SESSION
> Provides a way for userspace to create a named session for grouping file
> descriptors that need to be preserved. It returns a new file descriptor
> representing the session.
> 
> LIVEUPDATE_IOCTL_RETRIEVE_SESSION
> Allows the userspace agent in the new kernel to reclaim a preserved
> session by its name, receiving a new file descriptor to manage the
> restored resources.
> 
> Signed-off-by: Pasha Tatashin <pasha.tatashin@...een.com>

Reviewed-by: Mike Rapoport (Microsoft) <rppt@...nel.org>

> ---
>  include/uapi/linux/liveupdate.h  |  64 +++++++++++
>  kernel/liveupdate/luo_core.c     | 179 ++++++++++++++++++++++++++++++-
>  kernel/liveupdate/luo_internal.h |  21 ++++
>  3 files changed, 263 insertions(+), 1 deletion(-)

-- 
Sincerely yours,
Mike.