linux-kernel - Re: [2.6.18-rc* PATCH RFC]: Correct ambiguous errno of aio

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Date:	Tue, 29 Aug 2006 15:04:11 -0400
From:	Benjamin LaHaise <bcrl@...ck.org>
To:	Zach Brown <zab@...bo.net>
Cc:	Yi Yang <yang.y.yi@...il.com>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...l.org>, linux-aio <linux-aio@...ck.org>
Subject: Re: [2.6.18-rc* PATCH RFC]: Correct ambiguous errno of aio

On Tue, Aug 29, 2006 at 11:32:05AM -0700, Zach Brown wrote:
> Like it or not, the sys_io_submit() interface returns -EINVAL when the
> file descriptor doesn't support the requested command.  Changing the
> binary interface is a big deal and should not be done lightly.  What is
> the motivation for making this change?

-EOPNOTSUPP also gives the wrong error message, as it is a networking 
error.  Any program which knows that it is submitting a correctly filled 
in set of parameters can deduce the reason for the -EINVAL.  Changing it 
otherwise would result in behaviour outside of that specified in the man 
page (which lists reasons for the -EINVAL result).

		-ben
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