nfsd: clean up fh_auth usage
Use fh_fsid when reffering to the fsid part of the filehandle. The variable length auth field envisioned in nfsfh wasn't ever implemented. Also clean up some lose ends around this and document the file handle format better. Btw, why do we even export nfsfh.h to userspace? The file handle very much is kernel private, and nothing in nfs-utils include the header either. Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NJ. Bruce Fields <bfields@redhat.com>
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