netdev - Re: [PATCH v2 bpf-next 1/2] bpf: include sub program tags in bpf_prog

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Message-ID: <b2391ae1-171d-d972-c7e5-1c4b55c236c5@iogearbox.net>
Date:   Tue, 11 Dec 2018 16:54:04 +0100
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Song Liu <songliubraving@...com>, netdev@...r.kernel.org
Cc:     ast@...nel.org, kernel-team@...com, kafai@...com
Subject: Re: [PATCH v2 bpf-next 1/2] bpf: include sub program tags in
 bpf_prog_info

On 12/11/2018 09:18 AM, Song Liu wrote:
> Changes from v1:
> 1. Fix error path as Martin suggested.
> 
> This patch adds nr_prog_tags and prog_tags to bpf_prog_info. This is a
> reliable way for user space to get tags of all sub programs. Before this
> patch, user space need to find sub program tags via kallsyms.
> 
> This feature will be used in BPF introspection, where user space queries
> information about BPF programs via sys_bpf.

Should bpftool be updated as well to support this facility?

Thanks,
Daniel