NFSv4.1: data server connection

Introduce a data server set_client and init session following the
nfs4_set_client and  nfs4_init_session convention.

Once a new nfs_client is on the nfs_client_list, the nfs_client cl_cons_state
serializes access to creating an nfs_client struct with matching properties.

Use the new nfs_get_client() that initializes new clients.

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

1 files changed, 27 insertions, 2 deletions

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 55a8fc2f3df4..07d1a43f40f5 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1573,9 +1573,8 @@ static int _nfs4_proc_open(struct nfs4_opendata *data)
         return 0;
 }
 
-static int nfs4_recover_expired_lease(struct nfs_server *server)
+static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
 {
-        struct nfs_client *clp = server->nfs_client;
         unsigned int loop;
         int ret;
 
@@ -1592,6 +1591,11 @@ static int nfs4_recover_expired_lease(struct nfs_server *server)
         return ret;
 }
 
+static int nfs4_recover_expired_lease(struct nfs_server *server)
+{
+        return nfs4_client_recover_expired_lease(server->nfs_client);
+}
+
 /*
  * OPEN_EXPIRED:
  *      reclaim state on the server after a network partition.
@@ -5118,6 +5122,27 @@ int nfs4_init_session(struct nfs_server *server)
         return ret;
 }
 
+int nfs4_init_ds_session(struct nfs_client *clp)
+{
+        struct nfs4_session *session = clp->cl_session;
+        int ret;
+
+        if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
+                return 0;
+
+        ret = nfs4_client_recover_expired_lease(clp);
+        if (!ret)
+                /* Test for the DS role */
+                if (!is_ds_client(clp))
+                        ret = -ENODEV;
+        if (!ret)
+                ret = nfs4_check_client_ready(clp);
+        return ret;
+
+}
+EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
+
+
 /*
  * Renew the cl_session lease.
  */