Building an NFSv4-enabled kernel.

• Recent 2.6 kernels have NFSv4 support. However, if you wish to report bugs, we'd prefer you test our latest code. So, apply the CITI_NFS4_ALL patch to the kernel

  tar -xjvf linux-2.6.??-rc?.tar.bz2
  cd linux-2.6.??-rc?
  patch -p1 <../linux-2.6.??-rc?-CITI_NFS4_ALL-?.diff
  

• Configure the kernel, making sure to select, at a minimum,
  • Code maturity options->Prompt for development and/or incomplete code/drivers
  • File systems->Network File Systems->NFS file system support
  • File systems->Network File Systems->Provide NFSv3 client support
  • File systems->Network File Systems->Provide NFSv4 client support
  • File systems->Network File Systems->NFS server support
  • File systems->Network File Systems->Provide NFSv3 server support
  • File systems->Network File Systems->Provide NFSv4 server support
  • File systems->Network File Systems->Provide NFS server over TCP support
  • Cryptographic options->Cryptographic API
  • Cryptographic options->MD5 digest algorithm
  • Cryptographic options->DES and Triple DES EDE cipher algorithms

  Note that "Secure RPC: Kerberos V mechanism" will also be selected for you in the "Network File Systems" menu if you select the above.

• Assuming your server's filesystem is ext3 (recommended), you should also select
  • File systems->Ext3 extended attributes
  • File systems->Ext3 POSIX Access Control Lists
  (Whatever filesystem you use, the point is to that if you wish to use NFSv4's extended attribute and ACL features, then the corresponding features must first be exported by the filesystem you export.
• Build and install the new kernel, update your bootloader as necessary, and boot to the new kernel.