netdev - Re: [PATCH bpf-next] bpf: change eBPF helper doc parsing script to allow for smaller indent

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Date:   Thu, 17 May 2018 17:05:12 +0100
From:   Quentin Monnet <quentin.monnet@...ronome.com>
To:     Daniel Borkmann <daniel@...earbox.net>, ast@...nel.org
Cc:     netdev@...r.kernel.org, oss-drivers@...ronome.com
Subject: Re: [PATCH bpf-next] bpf: change eBPF helper doc parsing script to
 allow for smaller indent

2018-05-17 17:38 UTC+0200 ~ Daniel Borkmann <daniel@...earbox.net>
> On 05/17/2018 02:43 PM, Quentin Monnet wrote:
>> Documentation for eBPF helpers can be parsed from bpf.h and eventually
>> turned into a man page. Commit 6f96674dbd8c ("bpf: relax constraints on
>> formatting for eBPF helper documentation") changed the script used to
>> parse it, in order to allow for different indent style and to ease the
>> work for writing documentation for future helpers.
>>
>> The script currently considers that the first tab can be replaced by 6
>> to 8 spaces. But the documentation for bpf_fib_lookup() uses a mix of
>> tabs (for the "Description" part) and of spaces ("Return" part), and
>> only has 5 space long indent for the latter.
>>
>> We probably do not want to change the values accepted by the script each
>> time a new helper gets a new indent style. However, it is worth noting
>> that with those 5 spaces, the "Description" and "Return" part *look*
>> aligned in the generated patch and in `git show`, so it is likely other
>> helper authors will use the same length. Therefore, allow for helper
>> documentation to use 5 spaces only for the first indent level.
>>
>> Signed-off-by: Quentin Monnet <quentin.monnet@...ronome.com>
> 
> Applied to bpf-next, thanks Quentin! Btw in the current uapi description
> some of the helpers have a new line before 'Return' and most have not. I
> presume it doesn't really matter though we might want to do a one-time
> cleanup on these cases at some point in time.

Thanks Daniel!

I did notice those new lines as well. The script was failing on the
5-space indent, but not on the new lines, so I let them as they are. I
agree for the cleanup, I can send a patch when the various helpers
currently being discussed on the list are merged.

Best,
Quentin