Using SLES11 SP1, I’m sure other distro’s will have similar files.
/proc/fs/nfsfs/servers
/proc/fs/nfsfs/volumes
/var/lib/nfs/etab:
contains information about what filesystems should be exported to whom at the moment.
/var/lib/nfs/rmtab:
contains a list of which filesystems actually are mounted by certain clients at the moment.
/proc/fs/nfs/exports:
contains information about what filesystems are exported to actual client (individual, not subnet or whatever) at the moment.
/var/lib/nfs/xtab:
is the same information as /proc/fs/nfs/exports but is maintained by nfs-utils instead of directly by the kernel. It is only used if /proc isn’t mounted.
Some helpful URLS
http://www.novell.com/communities/node/3787/configuring-nfsv4-server-and-client-suse-linux-enterprise-server-10
http://www.softpanorama.org/Commercial_linuxes/Suse/Networking/suse_nfs.shtml
