gonfs

GONFS is a NFS version 3 filesystem written in golang as per RFC 1813 protocol specification.
The server consists of 4 modules : NFS3 FileSystem Backend, Portmapper client,
External Data Representation and ONC RemoteProcedureCall

Typical Usage

Start gonfs on a Linux server
go get github.com/storagXpert/gonfs
assuming GOPATH is set to /home/noroot/go, go get would fetch
gonfs project here: /home/noroot/go/src/github.com/storagXpert/gonfs
Switch to directory above and build gonfs binary by running go build .

Run rpcinfo -p to start rpcbind service.
Run gonfs as the default user.
Example : ./gonfs -allowAddr 192.168.109.0/24 -exportPath /home/noroot/storagXpert/mountDir
Other Configuration options : ./gonfs -h

Access from a Linux Client
Example : sudo mount -t nfs -o nfsvers=3,tcp,nolock,noacl,intr,soft,rw
192.168.109.101:/home/noroot/storagXpert/mountDir/home/noroot/localMnt
(gonfs server is running on 192.168.109.101)

Access from Windows10 Client
Goto Control Panel->Programs>Programs and Features->Turn Windows Feature on or off
Turn on Windows10 'Client for NFS' under 'Services for NFS' feature.
Run regedit and goto HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ClientForNFS\CurrentVersion\Default
Create a new DWORD(32-bit) Value 'AnonymousUid' and assign the UID shown by the gonfs server start message.
Create a new DWORD(32-bit) Value 'AnonymousGid ' and assign the GID shown by the gonfs server start message.

Now, you can mount NFS exported directory by gonfs from windows cmd prompt.
Example : mount -o anon -o nolock \192.168.109.101\home\noroot\storagXpert\mountDir Y:
(gonfs server is running on 192.168.109.101)

Testing

GONFS Passes Connectathon NFS tests.
There are 4 types of test : basic, general, special and lock.
gonfs does not support NLM protocol.

Steps to run test suite
Start gonfs on a linux server.
On a Linux Client,
git clone https://github.com/phdeniel/cthon04.git
sudo make all
Now, you can run basic, general and special tests.
Example :
./server -b -o "nfsvers=3,tcp,nolock,noacl,intr,soft,lookupcache=none,rw" -p "/home/noroot/storagXpert/mountDir" -m "/home/noroot/localMnt" 192.168.109.101
./server -g -o "nfsvers=3,tcp,nolock,noacl,intr,soft,lookupcache=none,rw" -p "/home/noroot/storagXpert/mountDir" -m "/home/noroot/localMnt" 192.168.109.101
./server -s -o "nfsvers=3,tcp,nolock,noacl,intr,soft,lookupcache=none,rw" -p "/home/noroot/storagXpert/mountDir" -m "/home/noroot/localMnt" 192.168.109.101
(gonfs server is running on 192.168.109.101)

Development Status

1. No exports file support for elaborate nfs configuration.
2. All access would be squashed to user running gonfs server.
3. Server would return ESTALE for old fileHandles after a crash/reboot.
4. No daemonization of gonfs server.
5. No ACL, NLM support.
6. Supported network is TCP only.
7. gonfs currently runs on Linux/Unix only.

Bug Report and Help

e-mail : storagxpert@gmail.com