linux-kernel - Re: [PATCH] fat: remove redundent call to fat_detach in vfat

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Message-ID: <CAKYAXd-JApY3-4eBn5mDv_fB8JweHDUqdUX7y6ChTkuYbJNjVQ@mail.gmail.com>
Date:	Mon, 3 Sep 2012 15:08:38 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	Al Viro <viro@...iv.linux.org.uk>
Cc:	hirofumi@...l.parknet.co.jp, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org,
	Amit Sahrawat <amit.sahrawat83@...il.com>
Subject: Re: [PATCH] fat: remove redundent call to fat_detach in vfat_unlink

2012/9/1, Al Viro <viro@...iv.linux.org.uk>:
> On Fri, Aug 31, 2012 at 12:48:07PM -0400, Namjae Jeon wrote:
>> As after file is removed fat_evict_inode will be called and fat_detach
>> will be called from that place. So, fat_detach can be removed from
>> vfat_unlink
>
> NAK.  Please, realize that unlink and destruction of file are separate
> operations.  ->evict_inode() may be called long after ->unlink(); moreover,
> during that time you might have another file created, getting the
> same directory entry our file used to have.
>
> This is Unix, damnit.  You *can* open file, then unlink it and that file
> will keep existing (i.e. you can write to that descriptor, read, etc.)
> until it's closed.
>
Hi Al.
Sorry for noise. I understand what you said.
There was some confusing to me while checking fat's estale issue.:)
I will re-post patch-set about fat estale issue soon.(fix side-effect
informed by you and ogawa)
I am grateful that you review these patches also if you have time.
Thanks.
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