tree 6e7eb831bbfe732044105f7f7a477fda5e912b6c
parent 65de872ed6501a68e918a49a5c2fa7fca9c6ce21
author Trond Myklebust <Trond.Myklebust@netapp.com> 1230063704 -0500
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1230063704 -0500

NFSv4: Ensure that file unlock requests don't conflict with state recovery

The unlock path is currently failing to take the nfs_client->cl_sem read
lock, and hence the recovery path may see locks disappear from underneath
it.
Also ensure that it takes the nfs_inode->rwsem read lock so that it there
is no conflict with delegation recalls.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>