From: Chuck Lever <chuck.lever@oracle.com>
Subject: [PATCH 00/17] RFC: mount.nfs support for NFSv4 over IPv6
Date: Mon, 18 Feb 2008 13:35:20 -0500
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Here's a proposal for adding support in mount.nfs for mounting NFSv4
servers over IPv6.  It provides mount.nfs4 with the ability to resolve a
hostname to an IPv6 address and pass it to the kernel.  It can also pass an
IPv6 local address via clientaddr=.

Kernel level sunrpc support rpcbind protocol versions 3 and 4 must be
enabled via Kconfig.  Support for user-space rpcbind operations for IPv6
addresses is not needed with NFSv4, since the kernel handles rpcbind
operations for NFS version 4.

To support NFS version 2 and 3 mounts over IPv6, user level support for
rpcbind versions 3 and 4 will be required.  That is currently under
development.

Unmount support in umount.nfs4 for IPv6 is not needed for NFSv4 since
unmounting an nfs4 file system is a local client operation only.

This code is untested; it is posted for review only.

-- 
corporate:    <chuck dot lever at oracle dot com>