NFS-GANESHA is an NFS version 2-4 server that runs in the user address space instead of as part of the operating system kernel. Filesystem in Userspace (FUSE) lets you run a filesystem in the user address space instead of as part of the Linux kernel, but the FUSE support in the Linux kernel from many Linux distributions does not allow you to export FUSE through NFS. NFS-GANESHA lets you expose FUSE through NFS without patching your kernel.