linux-ext4 - Re: [PATCH 1/10] VFS: Fix error handling ofwrite_super

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Date:	Mon, 22 Sep 2008 21:52:09 +0900
From:	"Takashi Sato" <t-sato@...jp.nec.com>
To:	"Christoph Hellwig" <hch@...radead.org>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Christoph Hellwig" <hch@...radead.org>,
	<linux-fsdevel@...r.kernel.org>, <dm-devel@...hat.com>,
	<viro@...IV.linux.org.uk>, <linux-ext4@...r.kernel.org>,
	<xfs@....sgi.com>, <axboe@...nel.dk>,
	<mtk.manpages@...glemail.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/10] VFS: Fix error handling ofwrite_super_lockfs/unlockfs

Hi,

> On Mon, Sep 22, 2008 at 07:55:26PM +0900, Takashi Sato wrote:
>> I've changed the type of write_super_lockfs and unlockfs from "void" to
>> "int" so that they can return an error.
>
> Returning an error from the freeze operation makes sense, but for the
> unfreeze I don't see the point.  You must however change all existing
> instances to actually return a value (even if it's always 0 for now)
> to avoid breaking git bisect.

I thought unlockfs should return an error because ext3_unlockfs()
might cause I/O error in writing a super block.
But it is an internal error and the unfreezing succeeds.
So I will consider returning 0.

> If you touch all instances anyway, it would be nice to rename them
> to freeze / unfreze as the current names are more confusing.

I will consider renaming.

Cheers, Takashi
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