forgetful client

This set of patches (2.6.35-rc2) includes a first attempt to implement the forgetful client model for the pNFS client. The model is explained is patch 6.
It also includes some minor cleanups in the layout management code that help to improve the maintanability of the current code.

Passed cthon tests against the pyNFS server, and against a modified version of pyNFS server that randomly issues layout recalls after opens.

Alexandros Batsakis (7):
pnfs-submit: clean struct nfs_inode
pnfs-submit: remove lgetcount, lretcount
pnfs-submit: change stateid to be a union
pnfs-submit: request whole-file layouts only
pnfs-submit: change layout list to be similar to other state lists
pnfs-submit: forgetful client (layouts)
pnfs-submit: support for CB_RECALL_ANY (layouts)

 fs/nfs/callback.h         |    7 ++
 fs/nfs/callback_proc.c    |  231 ++++++++++++++++++++++++++++++++++-----------
 fs/nfs/callback_xdr.c     |    2 +-
 fs/nfs/client.c           |    2 +-
 fs/nfs/delegation.c       |   19 ++--
 fs/nfs/inode.c            |   12 +-
 fs/nfs/nfs4_fs.h          |    1 +
 fs/nfs/nfs4proc.c         |   46 +++++----
 fs/nfs/nfs4state.c        |    4 +-
 fs/nfs/nfs4xdr.c          |   38 ++++----
 fs/nfs/pnfs.c             |  214 +++++++++++++++++------------------------
 fs/nfs/pnfs.h             |    3 +-
 fs/nfsd/nfs4callback.c    |    1 -
 include/linux/nfs4.h      |   16 +++-
 include/linux/nfs4_pnfs.h |    2 +-
 include/linux/nfs_fs.h    |   28 +++---
 include/linux/nfs_fs_sb.h |    2 +-
 17 files changed, 372 insertions(+), 256 deletions(-)