To: Jan Kara <jack@suse.cz>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] 2.6.23: Filesystem capabilities 0.17
References: <871wbhc0zj.fsf@olafdietsche.de>
	<20071031170853.GD28809@atrey.karlin.mff.cuni.cz>
	<87tzo5925v.fsf@olafdietsche.de> <20071101215424.GA27788@duck.suse.cz>
From: Olaf Dietsche <olaf+list.linux-kernel@olafdietsche.de>
Date: Thu, 01 Nov 2007 23:22:51 +0100
In-Reply-To: <20071101215424.GA27788@duck.suse.cz> (Jan Kara's message of "Thu\, 1 Nov 2007 22\:54\:24 +0100")
Message-ID: <87fxzp8v2c.fsf@olafdietsche.de>
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Jan Kara <jack@suse.cz> writes:

> On Thu 01-11-07 20:49:32, Olaf Dietsche wrote:
>> Jan Kara <jack@suse.cz> writes:
>> 
>> >> This patch implements filesystem capabilities. It allows to
>> >> run privileged executables without the need for suid root.
>> >   Hmm, is there some "design document" so that one does not have to poke
>> > through the code and find out what it's actually trying to do?
>> 
>> What do you mean with "trying to do"? I thought this is obvious, it
>> provides executables with filesystem capabilities.
>   Well, yes, that was obvious but I rather meant "how is it doing it?".
> So where does it store these bits and such.

The bits are stored in a sparse file named /.capabilities in the
directory of the mount point, where the corresponding executable
lives. The inode number of the file is the index into this file.

Regards, Olaf.
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