linux-kernel - Re: [PATCH] fs: fix sysctls.c built

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Date:   Fri, 14 Apr 2023 09:19:07 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Luis Chamberlain <mcgrof@...nel.org>,
        Christian Brauner <brauner@...nel.org>
CC:     <linux-fsdevel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        <linux-kernel@...r.kernel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH] fs: fix sysctls.c built



On 2023/4/14 3:43, Luis Chamberlain wrote:
> On Thu, Apr 13, 2023 at 11:46:24AM -0700, Luis Chamberlain wrote:
>> On Thu, Apr 13, 2023 at 10:06:35AM -0700, Luis Chamberlain wrote:
>>> On Wed, Apr 12, 2023 at 11:19:56AM +0200, Christian Brauner wrote:
>>>> On Tue, Apr 11, 2023 at 12:14:44PM +0800, Kefeng Wang wrote:
>>>>> /proc/sys/fs/overflowuid and overflowgid  will be lost without
>>>>> building this file, kindly ping, any comments, thanks.
>>>>>
>>>>>
...
>>>>
>>>> Given the description in
>>>> ab171b952c6e ("fs: move namespace sysctls and declare fs base directory")
>>>> you probably want to move this earlier.
>>>
>>> I was being *way* too cautious and I was wrong, so I'll take Kefang's patch as
>>> I can verify now that order does not matter and his patch is correct.
>>> I've corrected the documentation and clarified this on sysctl-next and
>>> so reflected on linux-next too with these two patches:
>>>
>>> sysctl: clarify register_sysctl_init() base directory order
>>> https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?h=sysctl-next-20230413&id=8ae59580f2b0529b6dd1a1cda6b838cfb268cb87
>>>
>>> proc_sysctl: move helper which creates required subdirectories
>>> https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?h=sysctl-next-20230413&id=f4c09b14073513efd581459520a01c4c88cb24d7
>>>
>>> proc_sysctl: update docs for __register_sysctl_table()
>>> https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?h=sysctl-next-20230413&id=d59d91edd67ec4cef62f26249510fe08b291ae72
>>>
>>> proc_sysctl: enhance documentation
>>> https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux.git/commit/?h=sysctl-next-20230413&id=eb472aa0678fd03321093bffeb9c7fd7f5035844
>>>
>>> And so something we can do eventually is do away with all the base stuff.
>>> For now it's fine, it's not creating an issue.
>>
>> Come to think of it all the above patches except the one that moves code
>> ("proc_sysctl: move helper which creates required subdirectories") are
>> stable fix candidates prior to Kefeng's patch. I'll also update Kefeng's
>> patch to mention stable down to v5.17 and update the other patches with
>> the respective stable tag as well.

Thanks for your detail explanation.

> 
> OK pushed to sysctl-next and updated the patches above also to refer to
> stable and Cc you guys. Finally, a good reason or value to having Cc on
> the commit log. It just tmeans you (Christian and Kefeng) will be be CC'd
> once this trickles to stable kernel trees too.
> 
>    Luis