linux-kernel - Re: [PATCH 0/4] tracing: improve symbolic printing

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Message-ID: <46b5785866870e9c1aefbe222d69fbacb93c1cdd.camel@sipsolutions.net>
Date:   Wed, 04 Oct 2023 20:38:46 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: [PATCH 0/4] tracing: improve symbolic printing

On Wed, 2023-10-04 at 09:22 -0700, Jakub Kicinski wrote:
> 
> Potentially naive question - the trace point holds enum skb_drop_reason.
> The user space can get the names from BTF. Can we not teach user space
> to generically look up names of enums in BTF?

I'll note that, unrelated to the discussion about whether or not we
could use BTF, we couldn't do it in this case anyway since the whole
drop reasons aren't captured in enum skb_drop_reason, that contains only
the core ones, and now other subsystems are adding their own somewhat
dynamically later.

johannes