Re: NFS and non-blkdev-backed FS?

[Christoph Hellwig <hch@xxxxxxxxxxxxx>]

On Fri, Aug 15, 2008 at 11:55:59AM +0300, Artem Bityutskiy wrote:
> UBIFS (as e.g. XFS) has a 16-byte UUID in superblock which is
> supposed to uniquely identify the file-system. I'd like to use
> this UUID as NFS FSID instead, however, I failed to find how
> to do this. Any hints how could I do this?

You would need a new export operations method for initializating the
the fsid part of the file handle.  This method would be calked from
fh_compose or rather the new fsid generating factored out from that.

Note that it would be good to use this for block bases filesystems, too
so there should be some way to override the default fsids for those,
too.
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