tree 5ca75f92bd5aa9629f30c21d6e0e8df8f0984235
parent 6b180f0b57af0295e8dc2602a7a4781241766340
author Jeff Layton <jlayton@primarydata.com> 1406684067 -0400
committer J. Bruce Fields <bfields@redhat.com> 1406830819 -0400

nfsd: Add a mutex to protect the NFSv4.0 open owner replay cache

We don't want to rely on the client_mutex for protection in the case of
NFSv4 open owners. Instead, we add a mutex that will only be taken for
NFSv4.0 state mutating operations, and that will be released once the
entire compound is done.

Also, ensure that nfsd4_cstate_assign_replay/nfsd4_cstate_clear_replay
take a reference to the stateowner when they are using it for NFSv4.0
open and lock replay caching.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>