From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dan Carpenter <dan.carpenter@oracle.com>
Subject: Re: SIOCGIFCONF and AF_AX25
Date: Mon, 17 Jan 2022 16:51:06 +0300
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To: Roland Schwarz <roland.schwarz@blackspace.at>
Cc: linux-hams@vger.kernel.org

On Sun, Jan 16, 2022 at 05:54:53PM +0100, Roland Schwarz wrote:
> Using ioctl SIOCGIFCONF one was able to list all interfaces, including
> AF_AX25.
> 
> This seems to be not be the case any more. I discovered it by trying to find
> out why N1UROs axdigi stopped working.
> 
> Is this a bug, or is there some other means how the interfaces can be
> enumerated?

In the kernel, the rule is "you're not allowed to break userspace".
What that means is that you can change the User facing API so long as
people don't notice and/or complain.  Since you are complaining that
means it is a bug.

Can you use git bisect to find out which patch broke this?

regards,
dan carpenter