linux-ext4 - Re: [PATCH 04/10] xfstets: fsstress add replace file operation

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Message-ID: <5130CCAE.2060108@sgi.com>
Date:	Fri, 1 Mar 2013 09:43:42 -0600
From:	Rich Johnston <rjohnston@....com>
To:	Dmitry Monakhov <dmonakhov@...nvz.org>
CC:	<xfs@....sgi.com>, <linux-fsdevel@...r.kernel.org>,
	<linux-ext4@...r.kernel.org>, <dchinner@...hat.com>
Subject: Re: [PATCH 04/10] xfstets: fsstress add replace file operation

On 02/20/2013 04:42 AM, Dmitry Monakhov wrote:
> The most common usecase for rename(2) syscall is an atomic replacement
> of existing file with newer version. But rename_f() rename some existing
> filename to newly generated (non existing) filename. As result the most
> important usecase is not covered.

Good catch.

> Since rename_f() is already exist in fsstress and it has known behavior,
> some tests already depends on that behaviour, let's add another operation
> (replace_f) which invoke rename(2) for two existing entries.

>
> OUT_OF_COMMIT_DISCUSSION:
> Off course replace_f() break naming convention where fun_name == syscall_f(),
> but this is the only way I see to introduce new feature and not break
> other tests. May be it is reasonable to call it rename2_f() ?
>

I think this possible exposes a bug which was not exposed by before when 
running for example test 076 and test 083 on both ext4 and xfs.

Suggest this new function is called rename2_() so that we don't change 
the existing known tests.

Regards
--Rich
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