linux-kernel - Re: [PATCH bpf-next] netkit: Add some ethtool ops to provide information to user

lists.openwall.net		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 linux-cve-announce 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]

Message-ID: <51dd35c9-ff5b-5b11-04d1-9a5ae9466780@blackwall.org>
Date:   Thu, 30 Nov 2023 11:06:27 +0200
From:   Nikolay Aleksandrov <razor@...ckwall.org>
To:     Feng zhou <zhoufeng.zf@...edance.com>, daniel@...earbox.net,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     bpf@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, yangzhenze@...edance.com,
        wangdongdong.6@...edance.com, tangchen.1@...edance.com
Subject: Re: [PATCH bpf-next] netkit: Add some ethtool ops to provide
 information to user

On 11/30/23 09:58, Feng zhou wrote:
> From: Feng Zhou <zhoufeng.zf@...edance.com>
> 
> Add get_strings, get_sset_count, get_ethtool_stats to get peer
> ifindex.
> ethtool -S nk1
> NIC statistics:
>       peer_ifindex: 36
> 
> Add get_link, get_link_ksettings to get link stat.
> ethtool nk1
> Settings for nk1:
> 	...
> 	Link detected: yes
> 
> Add get_ts_info.
> ethtool -T nk1
> Time stamping parameters for nk1:
> ...
> 
> Signed-off-by: Feng Zhou <zhoufeng.zf@...edance.com>
> ---
>   drivers/net/netkit.c | 53 ++++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 53 insertions(+)
> 

Hi,
I don't see any point in sending peer_ifindex through ethtool, even
worse through ethtool stats. That is definitely the wrong place for it.
You can already retrieve that through netlink. About the speed/duplex
this one makes more sense, but this is the wrong way to do it.
See how we did it for virtio_net (you are free to set speed/duplex
to anything to please bonding for example). Although I doubt anyone will 
use netkit with bonding, so even that is questionable. :)

Nacked-by: Nikolay Aleksandrov <razor@...ckwall.org>

Cheers,
  Nik