linux-kernel - Re: [PATCH] sysfs: add filter function to groups

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Message-ID: <4726180E.5030909@garzik.org>
Date:	Mon, 29 Oct 2007 13:27:42 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	James Bottomley <James.Bottomley@...elEye.com>
CC:	Cornelia Huck <cornelia.huck@...ibm.com>,
	Kay Sievers <kay.sievers@...y.org>, Greg KH <greg@...ah.com>,
	linux-scsi <linux-scsi@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sysfs: add filter function to groups

James Bottomley wrote:
> visibility and creation are the same thing, aren't they?  An invisible
> attribute doesn't appear in the sysfs directory, so it's equivalent to
> the file for it not being created.


What about the case where it's visible at creation time, but then needs 
to be made selectively invisible later on?

That implies either a remove operation or dentry checks on each lookup?

	Jeff


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