lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 21 Sep 2020 00:23:18 +0000
From:   Vladimir Oltean <>
To:     Andrew Lunn <>
CC:     netdev <>,
        Florian Fainelli <>,
        Jakub Kicinski <>, Jiri Pirko <>,
        Chris Healy <>
Subject: Re: [PATCH net-next RFC v1 1/4] net: devlink: Add support for port

On Mon, Sep 21, 2020 at 02:45:39AM +0300, Vladimir Oltean wrote:
> This looks like a simple enough solution, but am I right that old
> kernels, which ignore this new DEVLINK_ATTR_PORT_INDEX netlink
> attribute, will consequently interpret any devlink command for a port as
> being for a global region? Sure, in the end, that kernel will probably
> fail anyway, due to the region name mismatch. And at the moment there
> isn't any driver that registers a global and a port region with the same
> name. But when that will happen, the user space tools of the future will
> trigger incorrect behavior into the kernel of today, instead of it
> reporting an unsupported operation as it should. Or am I
> misunderstanding?

Thinking about this more, I believe that the only conditions that need
to be avoided are:
- mlx4 should never create a port region called "cr-space" or "fw-health"
- ice should never create a port region called "nvm-flash" or
- netdevsim should never create a port region called "dummy"
- mv88e6xxx should never create a port region called "global1",
  "global2" or "atu"

Because these are the only region names supported by kernels that don't
parse DEVLINK_ATTR_PORT_INDEX, I think we don't need to complicate the
solution, and go with DEVLINK_ATTR_PORT_INDEX.


Powered by blists - more mailing lists