linux-kernel - Re: [RESEND PATCH] bpftool: Support use full prog name in prog subcommand

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Message-ID: <6927ffa1-e7f5-6691-dc86-da6c0d628c4f@isovalent.com>
Date:   Wed, 2 Nov 2022 11:56:55 +0000
From:   Quentin Monnet <quentin@...valent.com>
To:     Tao Chen <chentao.kernel@...ux.alibaba.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>
Cc:     bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RESEND PATCH] bpftool: Support use full prog name in prog
 subcommand

2022-11-02 10:35 UTC+0800 ~ Tao Chen <chentao.kernel@...ux.alibaba.com>
> Now that the commit: <b662000aff84> ("bpftool: Adding support for BTF
> program names") supported show the full prog name, we can also use
> the full prog name more than 16 (BPF_OBJ_NAME_LEN) chars in prog
> subcommand, such as "bpftool prog show name PROG_NAME".
> 
> Signed-off-by: Tao Chen <chentao.kernel@...ux.alibaba.com>

Thanks! But you mean you want something like this, correct?

	# ./bpftool prog pin \
		name prog_with_a_very_long_name /sys/fs/bpf/foo

This is already possible since commit d55dfe587bc0 ("bpftool: Remove
BPF_OBJ_NAME_LEN restriction when looking up bpf program by name"). Your
first version of the patch was based on a version that didn't have this
commit, but bpftool from bpf-next already supports this.

Quentin