nfs41: destroy_session operation

Implement the destroy_session operation conforming to
http://tools.ietf.org/html/draft-ietf-nfsv4-minorversion1-26

Signed-off-by: Ricardo Labiaga <ricardo.labiaga@netapp.com>
Signed-off-by: Andy Adamson<andros@umich.edu>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: remove extraneous rpc_clnt pointer]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41; NFS_CS_READY required for DESTROY_SESSION]
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
[nfs41: pass *session in seq_args and seq_res]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
[nfs41: fix encode_destroy_session's xdr Xcoding pointer type]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4d7a8b9e1291..59e8bf5b10bb 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4532,6 +4532,36 @@ out:
         return status;
 }
 
+/*
+ * Issue the over-the-wire RPC DESTROY_SESSION.
+ * The caller must serialize access to this routine.
+ */
+int nfs4_proc_destroy_session(struct nfs4_session *session)
+{
+        int status = 0;
+        struct rpc_message msg;
+
+        dprintk("--> nfs4_proc_destroy_session\n");
+
+        /* session is still being setup */
+        if (session->clp->cl_cons_state != NFS_CS_READY)
+                return status;
+
+        msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
+        msg.rpc_argp = session;
+        msg.rpc_resp = NULL;
+        msg.rpc_cred = NULL;
+        status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
+
+        if (status)
+                printk(KERN_WARNING
+                        "Got error %d from the server on DESTROY_SESSION. "
+                        "Session has been destroyed regardless...\n", status);
+
+        dprintk("<-- nfs4_proc_destroy_session\n");
+        return status;
+}
+
 #endif /* CONFIG_NFS_V4_1 */
 
 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {