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, 12 insertions, 0 deletions

diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index d4cfacc40003..7058a9f75e7f 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -266,6 +266,12 @@ is_ds_only_client(struct nfs_client *clp)
         return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
                 EXCHGID4_FLAG_USE_PNFS_DS;
 }
+
+static inline bool
+is_ds_client(struct nfs_client *clp)
+{
+        return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
+}
 #else /* CONFIG_NFS_v4_1 */
 static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
 {
@@ -289,6 +295,12 @@ is_ds_only_client(struct nfs_client *clp)
 {
         return false;
 }
+
+static inline bool
+is_ds_client(struct nfs_client *clp)
+{
+        return false;
+}
 #endif /* CONFIG_NFS_V4_1 */
 
 extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];