netdev - Re: [PATCH bpf-next 4/5] bpftool: Add SEC name for xdp programs attached to device map

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Date:   Wed, 27 May 2020 17:01:10 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     David Ahern <dsahern@...il.com>, David Ahern <dsahern@...nel.org>,
        netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, brouer@...hat.com,
        daniel@...earbox.net, john.fastabend@...il.com, ast@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com, andriin@...com
Subject: Re: [PATCH bpf-next 4/5] bpftool: Add SEC name for xdp programs attached to device map

David Ahern <dsahern@...il.com> writes:

> On 5/27/20 4:02 AM, Toke Høiland-Jørgensen wrote:
>> David Ahern <dsahern@...nel.org> writes:
>> 
>>> Support SEC("xdp_dm*") as a short cut for loading the program with
>>> type BPF_PROG_TYPE_XDP and expected attach type BPF_XDP_DEVMAP.
>> 
>> You're not using this in the selftest; shouldn't you be? Also, the
>> prefix should be libbpf: not bpftool:, no?
>> 
>
> The selftest is exercising kernel APIs - what is allowed and what is
> not.

Sure, but they also de facto serve as example code for features that are
not documented anywhere else, so just seemed a bit odd to me that you
were not using this to mark the programs.

Anyway, not going to insist if you prefer explicitly setting
expected_attach_type...

-Toke