Re: FS-specified FSID for non-device based filesystems?

[Greg KH <greg@kroah.com>]

On Mon, Apr 17, 2006 at 02:32:04PM +1000, Neil Brown wrote:
> On Sunday April 16, greg@kroah.com wrote:
> > On Mon, Apr 17, 2006 at 10:54:06AM +1000, Neil Brown wrote:
> > >  - filesystems don't have a place in /sys
> > 
> > Then what is /sys/fs/ for?  :)
> 
> good question!
> 
> adams # uname -a 
> Linux adams 2.6.17-rc1-mm1 #298 SMP Tue Apr 11 14:19:52 EST 2006 i686 GNU/Linux
> adams # ls -la /sys/fs
> total 0
> drwxr-xr-x   2 root root 0 Apr 17 14:23 .
> drwxr-xr-x  11 root root 0 Apr 17 14:23 ..
> 
> Doesn't look very useful yet, but I'm hopeful.
> 
> What naming scheme is expected?  i.e. If I want to look at the nfs
> client rpc stats for /import/warehouse,  where would I look?
>   /sys/fs/import/warehouse/nfs/stats
> seems unlikely.
> 
> The idea of putting filesystem stuff in /sys seem to come up on
> linux-kernel every so often and it never seems to get anywhere, often
> because Al Viro pokes obvious holes in the scheme.
> 
> I cannot find anything in Documentation/filesystems/sysfs.txt, so:
> How is /sys/fs supposed to work?

I don't know, as I didn't create it.  I think one of the FUSE developers
did.

thanks,

greg k-h