linux-kernel - Re: [PATCH 12/15] habanalabs/gaudi: add debugfs entries for the NIC

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: <20200910133058.0fe0f5e3@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Thu, 10 Sep 2020 13:30:58 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Oded Gabbay <oded.gabbay@...il.com>
Cc:     "Linux-Kernel@...r. Kernel. Org" <linux-kernel@...r.kernel.org>,
        netdev@...r.kernel.org, SW_Drivers <SW_Drivers@...ana.ai>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "David S. Miller" <davem@...emloft.net>,
        Omer Shpigelman <oshpigelman@...ana.ai>
Subject: Re: [PATCH 12/15] habanalabs/gaudi: add debugfs entries for the NIC

On Thu, 10 Sep 2020 23:17:59 +0300 Oded Gabbay wrote:
> > Doesn't seem like this one shows any more information than can be
> > queried with ethtool, right?  
> correct, it just displays it in a format that is much more readable

You can cat /sys/class/net/$ifc/carrier if you want 0/1.

> > > nic_mac_loopback
> > > is to set a port to loopback mode and out of it. It's not really
> > > configuration but rather a mode change.  
> >
> > What is this loopback for? Testing?  
> 
> Correct.

Loopback test is commonly implemented via ethtool -t