Allow GFS2 to be used for NFS serving and local file access simultaneously

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At the present time a GFS2 mount can only be used either for local access or NFS file serving. Doing both can cause panics or file system corruption at present.  This would allow a filesystem to be shared to Windows (via Samba) and Linux clients via NFS.


There has been some work in this area I believe but isn't there yet. I think this bug


This would finally allow GFS2 to be a filesystem with *no surprises*, removing one of it's last areas where it is limited compared to single node filesystems.





FWIW: The local vs NFS access issues apply across all FSes, not just GFS.


I believe the real fix is to remove NFS from the kernel and put it back into userspace where it belongs (and is, on other non-Linux OSes)