linux-kernel - RE: [PATCH net-next v5 10/10] ethtool: Veto some operations during firmware flashing process

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Date: Tue, 30 Apr 2024 17:48:17 +0000
From: Danielle Ratson <danieller@...dia.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "davem@...emloft.net"
	<davem@...emloft.net>, "edumazet@...gle.com" <edumazet@...gle.com>,
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	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, mlxsw
	<mlxsw@...dia.com>, Petr Machata <petrm@...dia.com>, Ido Schimmel
	<idosch@...dia.com>
Subject: RE: [PATCH net-next v5 10/10] ethtool: Veto some operations during
 firmware flashing process

> -----Original Message-----
> From: Jakub Kicinski <kuba@...nel.org>
> Sent: Tuesday, 30 April 2024 6:24
> To: Danielle Ratson <danieller@...dia.com>
> Cc: netdev@...r.kernel.org; davem@...emloft.net; edumazet@...gle.com;
> pabeni@...hat.com; corbet@....net; linux@...linux.org.uk;
> sdf@...gle.com; kory.maincent@...tlin.com;
> maxime.chevallier@...tlin.com; vladimir.oltean@....com;
> przemyslaw.kitszel@...el.com; ahmed.zaki@...el.com;
> richardcochran@...il.com; shayagr@...zon.com;
> paul.greenwalt@...el.com; jiri@...nulli.us; linux-doc@...r.kernel.org; linux-
> kernel@...r.kernel.org; mlxsw <mlxsw@...dia.com>; Petr Machata
> <petrm@...dia.com>; Ido Schimmel <idosch@...dia.com>
> Subject: Re: [PATCH net-next v5 10/10] ethtool: Veto some operations during
> firmware flashing process
> 
> On Wed, 24 Apr 2024 16:30:23 +0300 Danielle Ratson wrote:
> > Some operations cannot be performed during the firmware flashing process.
> >
> > For example:
> >
> > - Port must be down during the whole flashing process to avoid packet loss
> >   while committing reset for example.
> >
> > - Writing to EEPROM interrupts the flashing process, so operations like
> >   ethtool dump, module reset, get and set power mode should be vetoed.
> >
> > - Split port firmware flashing should be vetoed.
> >
> > - Flashing firmware on a device which is already in a flashing process
> >   should be forbidden.
> >
> > Use the 'module_fw_flashing_in_progress' flag introduced in a previous
> > patch to veto those operations and prevent interruptions while
> > preforming module firmware flash.
> 
> Feels a little out of order to add this check after the functionality.
> I'd merge this with patch 5.

Hi Jakub,

Some of this code is only presented in patch 9, so it will cause splitting some of the vetoes in patch 5 and some of it where the code around is presented.
Does it sound reasonable to you?

Thanks,
Danielle