Message-ID: <413865B4.7080208@cs.aau.dk>
Date: Fri, 03 Sep 2004 14:38:12 +0200
From: =?ISO-8859-1?Q?Kristian_S=F8rensen?= <ks@cs.aau.dk>
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To: umbrella-devel@lists.sourceforge.net
CC: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [Umbrella-devel] Re: Getting full path from dentry in LSM hooks
References: <41385FA5.806@cs.aau.dk> <20040903133238.A4145@infradead.org>
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Hi Christoph!

Christoph Hellwig wrote:
> On Fri, Sep 03, 2004 at 02:12:21PM +0200, Kristian S?rensen wrote:
> 
>>I have a short question, concerning how to get the full path of a file 
>>from a LSM hook.
>>
>>- If the "file" of the dentry is located in the root filesystem: no
>>   problem - simply traverse the dentrys, to generate the path.
>>
>>- If the "file" is mounted from another partition, you do not get the
>>   full path by traversing the dentrys.
> 
> 
> There is no canonical full path for a given dentry.
Is there another way to get it? We also get an inodepointer from the LSM 
hook. As far as I know, the file struct has an entry called vfs_mount, 
which has an entry called root_mnt - could this be used? (and if so, how 
do I get from the Inode to the file struct? :-/ )


KS.
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