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2010 Jun 02
2
NFS exporting btrfs subvolumes.
NFS needs a unique identifier for a filesystem to be able to export it. This can be set by the admin (fsid= in /etc/exports) but that is a hassle and it is best to set it automatically. nfs-utils currently uses the UUID returned by libblkid if that works, or the fsid returned by statfs64 if libblkid finds nothings and fsid is non-zero. Otherwise it uses device major/minor. This