Re: Checking FS type

[Diyab <diyab@xxxxxxxxxxxx>]

Christoph Hellwig wrote:
> On Sat, Jan 10, 2004 at 05:18:49PM -0500, Diyab wrote:
>
> > on.  With ext2/3 the EA attribute name is different from what it will be 
> > on an XFS file system
>
> This sounds like an incredibly bad idea.  We have a common xattr API and
> common namespaces to avoid exactly that kind of mess.  Would you mind to
> elborate why you are doign this?
Ext2/3 does not seem to have root/non-root namespace like XFS does. I 
have not been able to find any specific information about the design of 
Ext2/3 in this manner but the SELinux attribute name on this file system 
is security.selinux. Operating on security.selinux is fine but when you 
try to operate on user.security.selinux the operations fail with 
EOPNOTSUPP.  On XFS it is just the opposite, but I can see how stripping 
the namespace prefix from the attribute can make it fail. Basically what 
I am doing is putting a check in the SELinux API to look and see what 
the attribute name it should be using is.  If it's on XFS it operates on 
user.security.selinux, otherwise it operates on security.selinux.
Timothy,