linux-kernel - Re: [PATCH v4 3/4] fat: add renameat2 RENAME

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Date:   Thu, 09 Jun 2022 02:10:25 +0900
From:   OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:     Javier Martinez Canillas <javierm@...hat.com>
Cc:     linux-kernel@...r.kernel.org,
        Lennart Poettering <lennart@...ttering.net>,
        Colin Walters <walters@...bum.org>,
        Peter Jones <pjones@...hat.com>,
        Alberto Ruiz <aruiz@...hat.com>,
        Christian Kellner <ckellner@...hat.com>,
        Chung-Chiang Cheng <cccheng@...ology.com>,
        Muhammad Usama Anjum <usama.anjum@...labora.com>,
        Alexander Larsson <alexl@...hat.com>
Subject: Re: [PATCH v4 3/4] fat: add renameat2 RENAME_EXCHANGE flag support

Javier Martinez Canillas <javierm@...hat.com> writes:

> On 6/8/22 16:33, OGAWA Hirofumi wrote:
>> Javier Martinez Canillas <javierm@...hat.com> writes:
>> 
>>> +	/* update ".." directory entry info */
>>> +	if (old_dotdot_de) {
>>> +		err = vfat_update_dotdot_de(new_dir, old_inode, old_dotdot_bh,
>>> +					    old_dotdot_de);
>>> +		if (err)
>>> +			goto error_old_dotdot;
>>> +		drop_nlink(old_dir);
>>> +		inc_nlink(new_dir);
>>> +	}
>>> +
>>> +	if (new_dotdot_de) {
>>> +		err = vfat_update_dotdot_de(old_dir, new_inode, new_dotdot_bh,
>>> +					    new_dotdot_de);
>>> +		if (err)
>>> +			goto error_new_dotdot;
>>> +		drop_nlink(new_dir);
>>> +		inc_nlink(old_dir);
>>> +	}
>> 
>> Probably, we should change the nlink only if both of dotdot update are
>> succeed and different file type. Otherwise, we would have to revert the
>> nlink change on error path (and can remove unnecessary update as bonus).
>> 
>
> Agreed. I'll wait a few days before posting v5 in case you have more
> comments on the other patches.

Ok. I have no comment other than this at least for now (reviewed all
patches). If I found more on re-review I will send email.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>