linux-kernel - Re: [PATCH 1/1] vmgenid: emit uevent when VMGENID updates

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Message-ID: <00d6172f-e291-4e96-9d3e-63ee8e60d556@amazon.com>
Date:   Tue, 14 Nov 2023 13:51:59 +0100
From:   Alexander Graf <graf@...zon.com>
To:     Lennart Poettering <mzxreary@...inter.de>,
        "Jason A. Donenfeld" <Jason@...c4.com>
CC:     Babis Chalios <bchalios@...zon.es>, Theodore Ts'o <tytso@....edu>,
        <linux-kernel@...r.kernel.org>, <graf@...zon.de>,
        <xmarcalx@...zon.co.uk>, Arnd Bergmann <arnd@...db.de>,
        "rostedt@...dmis.org" <rostedt@...dmis.org>,
        Ted Tso <tytso@....edu>, Christian Brauner <brauner@...nel.org>
Subject: Re: [PATCH 1/1] vmgenid: emit uevent when VMGENID updates

Hi Jason,

On 20.06.23 13:28, Lennart Poettering wrote:
> On Mo, 19.06.23 22:30, Jason A. Donenfeld (Jason@...c4.com) wrote:
>
>> Like the other patch, and as discussed before too, I don't think this
>> has any business being part of (virtual) hardware drivers, and instead
>> belongs in random.c, which might receive these notifications from a
>> variety of devices, and can thus synchronize things accordingly.
>> Please stop posting more of these same approaches. Same nack as the
>> other ones.
> Note the intended usecase for this in userspace really has nothing to
> do with RNGs. We just want an event that is generated when a machine
> is duplicated so that we can request a new DHCP lease, and similar. I
> don't see any relationship to random.c for that.


Checking up on this conversation. The intended use case has nothing to 
do with RNG - we merely need a notification for system level user space 
that a system clone operation happened so it can act on it.

Please consider taking the patch as is or advise on how to proceed to 
address this non-RNG use case.


Thanks,

Alex




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