netdev - Re: [PATCH net-next] ethtool: add netlink support for rss set

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Message-ID: <20230315073732.jjcxv2ywkbw6vvuk@lion.mk-sys.cz>
Date:   Wed, 15 Mar 2023 08:37:32 +0100
From:   Michal Kubecek <mkubecek@...e.cz>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     "Mogilappagari, Sudheer" <sudheer.mogilappagari@...el.com>,
        Edward Cree <ecree.xilinx@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Samudrala, Sridhar" <sridhar.samudrala@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>
Subject: Re: [PATCH net-next] ethtool: add netlink support for rss set

On Tue, Mar 14, 2023 at 09:24:27PM -0700, Jakub Kicinski wrote:
> On Tue, 14 Mar 2023 23:51:00 +0000 Mogilappagari, Sudheer wrote:
> > How to get devname to be WILDCARD_DEVNAME ?
> 
> Isn't it just \* ?
> 
> $ ethtool \*

Yes, that's how it's supposed to work:

------------------------------------------------------------------------
mike@...n:~> /usr/sbin/ethtool -l '*'

Channel parameters for eth0:
Pre-set maximums:
RX:             n/a
TX:             n/a
Other:          1
Combined:       8
Current hardware settings:
RX:             n/a
TX:             n/a
Other:          1
Combined:       8

Channel parameters for eth1:
Pre-set maximums:
RX:             n/a
TX:             n/a
Other:          1
Combined:       8
Current hardware settings:
RX:             n/a
TX:             n/a
Other:          1
Combined:       8

Channel parameters for eth2:
Pre-set maximums:
RX:             n/a
TX:             n/a
Other:          1
Combined:       2
Current hardware settings:
RX:             n/a
TX:             n/a
Other:          1
Combined:       2
------------------------------------------------------------------------

In some cases where the output for a single device can consist of
many entries it may also make sense to iterate over something else.
Listing flow rules might be an example.

Michal