[07/16] pnfs: wave 3: add MDS mount DS only check
diff mbox

Message ID 1297711116-3139-8-git-send-email-andros@netapp.com
State Superseded, archived
Headers show

Commit Message

Andy Adamson Feb. 14, 2011, 7:18 p.m. UTC
None

Patch
diff mbox

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 4d15331..e48457a 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -1413,6 +1413,12 @@  static int nfs4_set_client(struct nfs_server *server,
 		goto error;
 	}
 
+	/* Cannot mount a DS only server */
+	if (is_ds_only_client(clp)) {
+		error = -ENODEV;
+		goto error;
+	}
+
 	/*
 	 * Query for the lease time on clientid setup or renewal
 	 *
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 7a74740..5d84642 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -259,6 +259,13 @@  extern int nfs4_proc_destroy_session(struct nfs4_session *);
 extern int nfs4_init_session(struct nfs_server *server);
 extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
 		struct nfs_fsinfo *fsinfo);
+
+static inline bool
+is_ds_only_client(struct nfs_client *clp)
+{
+	return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
+		EXCHGID4_FLAG_USE_PNFS_DS;
+}
 #else /* CONFIG_NFS_v4_1 */
 static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
 {
@@ -276,6 +283,12 @@  static inline int nfs4_init_session(struct nfs_server *server)
 {
 	return 0;
 }
+
+static inline bool
+is_ds_only_client(struct nfs_client *clp)
+{
+	return false;
+}
 #endif /* CONFIG_NFS_V4_1 */
 
 extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];