linux-kernel - Re: [PATCH v2 2/2] net: socket: implement SO

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Date:   Sat, 22 Aug 2020 12:36:50 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     kalou@....net
Cc:     linux-kernel@...r.kernel.org, linux-api@...r.kernel.org,
        netdev@...r.kernel.org, kuba@...nel.org, akpm@...ux-foundation.org,
        adobriyan@...il.com, viro@...iv.linux.org.uk
Subject: Re: [PATCH v2 2/2] net: socket: implement SO_DESCRIPTION

From: Pascal Bouchareine <kalou@....net>
Date: Fri, 21 Aug 2020 20:28:27 -0700

> This command attaches the zero terminated string in optval to the
> socket for troubleshooting purposes. The free string is displayed in the
> process fdinfo file for that fd (/proc/<pid>/fdinfo/<fd>).
> 
> One intended usage is to allow processes to self-document sockets
> for netstat and friends to report
> 
> We ignore optlen and constrain the string to a static max size
> 
> Signed-off-by: Pascal Bouchareine <kalou@....net>

This change is really a non-starter unless the information gets
published somewhere where people actually look at dumped sockets, and
that's inet_diag and friends.