On Wed, Sep 10, 2014 at 7:20 AM, Miklos Szeredi <[email protected]> wrote: > > >> This would be a challenge with any FUSE based filesystem which has > >> persistent filehandles larger than 64bit. > > Fuse does provide a total of 128bits of file handle identification > with nodeID + generation, with some of that number-space reserved for > special uses, unfortunately. > > Would be nice to provide for arbitrary file handle lengths. Will > look into that, at least for the libfuse-3.0 API. >
This is something beyond the libfuse API. Unless the kernel/user ABI is modified to present the entire 128bits with each call (i.e, both nodeID + generation instead of just nodeID) we are still bound to provide unique 64bit nodeID (and persistent for anything living across umount/mount). This is perhaps the biggest reason why GlusterFS implemented its own NFS server for v3 and uses NFS-Ganesha for v4, instead of using kNFSd. Thanks
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