tree 2b92c0f41ef7e303dd26f976a8afcdae467b08f0
parent 24956804349ca0eadcdde032d65e8c00b4214096
author Trond Myklebust <Trond.Myklebust@netapp.com> 1363800213 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1363876281 -0400

NFSv4.1: Add a helper pnfs_commit_and_return_layout

In order to be able to safely return the layout in nfs4_proc_setattr,
we need to block new uses of the layout, wait for all outstanding
users of the layout to complete, commit the layout and then return it.

This patch adds a helper in order to do all this safely.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: Boaz Harrosh <bharrosh@panasas.com>