linux-kernel - Re: [PATCH bpf-next v2 2/3] bpftool: Add bpftool-token manpage

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Message-ID: <368d27ec-0102-4ccc-909c-7174a096c9fd@linux.dev>
Date: Wed, 23 Jul 2025 00:14:03 +0800
From: Tao Chen <chen.dylane@...ux.dev>
To: Quentin Monnet <qmo@...nel.org>, ast@...nel.org, daniel@...earbox.net,
 andrii@...nel.org, martin.lau@...ux.dev, eddyz87@...il.com, song@...nel.org,
 yonghong.song@...ux.dev, john.fastabend@...il.com, kpsingh@...nel.org,
 sdf@...ichev.me, haoluo@...gle.com, jolsa@...nel.org, davem@...emloft.net,
 kuba@...nel.org, hawk@...nel.org
Cc: linux-kernel@...r.kernel.org, bpf@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH bpf-next v2 2/3] bpftool: Add bpftool-token manpage

在 2025/7/22 23:01, Quentin Monnet 写道:
> 2025-07-22 20:09 UTC+0800 ~ Tao Chen <chen.dylane@...ux.dev>
>> Add bpftool-token manpage with information and examples of token-related
>> commands.
>>
>> Signed-off-by: Tao Chen <chen.dylane@...ux.dev>
>> ---
>>   .../bpftool/Documentation/bpftool-token.rst   | 63 +++++++++++++++++++
>>   1 file changed, 63 insertions(+)
>>   create mode 100644 tools/bpf/bpftool/Documentation/bpftool-token.rst
>>
>> diff --git a/tools/bpf/bpftool/Documentation/bpftool-token.rst b/tools/bpf/bpftool/Documentation/bpftool-token.rst
>> new file mode 100644
>> index 00000000000..c5fe9292258
>> --- /dev/null
>> +++ b/tools/bpf/bpftool/Documentation/bpftool-token.rst
>> @@ -0,0 +1,63 @@
>> +.. SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +
>> +================
>> +bpftool-token
>> +================
>> +-------------------------------------------------------------------------------
>> +tool for inspection and simple manipulation of eBPF tokens
>> +-------------------------------------------------------------------------------
>> +
>> +:Manual section: 8
>> +
>> +.. include:: substitutions.rst
>> +
>> +SYNOPSIS
>> +========
>> +
>> +**bpftool** [*OPTIONS*] **token** *COMMAND*
>> +
>> +*OPTIONS* := { |COMMON_OPTIONS| }
>> +
>> +*COMMANDS* := { **show** | **list** | **help** }
>> +
>> +TOKEN COMMANDS
>> +===============
>> +
>> +| **bpftool** **token** { **show** | **list** }
>> +| **bpftool** **token help**
>> +|
>> +
>> +DESCRIPTION
>> +===========
>> +bpftool token { show | list }
>> +    List all the speciafic allowed types for **bpf**\ () system call
> 
> 
> Typo: "speciafic".
> 

will fix it, thanks.

> 
>> +    commands, maps, programs, and attach types, as well as the
>> +    *bpffs* mount point used to set the token information.
> 
> 
> This sentence needs to be adjusted now that you can print info for
> several mountpoints.
> 
> How about:
> 
>      List BPF token information for each *bpffs* mount point containing token
>      information on the system. Information include mount point path, allowed
>      **bpf**\ () system call commands, maps, programs, and attach types for the
>      token.
> 

This really looks better, thank you for your help.

> 
>> +
>> +bpftool prog help
>> +    Print short help message.
>> +
>> +OPTIONS
>> +========
>> +.. include:: common_options.rst
>> +
>> +EXAMPLES
>> +========
>> +|
>> +| **# mkdir -p /sys/fs/bpf/token**
>> +| **# mount -t bpf bpffs /sys/fs/bpf/token** \
>> +|         **-o delegate_cmds=prog_load:map_create** \
>> +|         **-o delegate_progs=kprobe** \
>> +|         **-o delegate_attachs=xdp**
>> +| **# bpftool token list**
>> +
>> +::
>> +
>> +    token_info  /sys/fs/bpf/token
>> +            allowed_cmds:
>> +              map_create          prog_load
>> +            allowed_maps:
>> +            allowed_progs:
>> +              kprobe
>> +            allowed_attachs:
>> +              xdp
> 


-- 
Best Regards
Tao Chen