Allow parsing vers=3.11 on cifs mount

Parses and recognizes "vers=3.1.1" on cifs mount and allows sending
0x0311 as a new CIFS/SMB3 dialect. Subsequent patches will add
the new negotiate contexts and updated session setup

Reviewed-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: Steve French <steve.french@primarydata.com>
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 8383d5e..9300b98 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -280,6 +280,10 @@
 	{ Smb_21, SMB21_VERSION_STRING },
 	{ Smb_30, SMB30_VERSION_STRING },
 	{ Smb_302, SMB302_VERSION_STRING },
+#ifdef CONFIG_CIFS_SMB311
+	{ Smb_311, SMB311_VERSION_STRING },
+#endif /* SMB311 */
+	{ Smb_version_err, NULL }
 };
 
 static int ip_connect(struct TCP_Server_Info *server);
@@ -1133,6 +1137,12 @@
 		vol->ops = &smb30_operations; /* currently identical with 3.0 */
 		vol->vals = &smb302_values;
 		break;
+#ifdef CONFIG_CIFS_SMB311
+	case Smb_311:
+		vol->ops = &smb30_operations; /* currently identical with 3.0 */
+		vol->vals = &smb311_values;
+		break;
+#endif /* SMB311 */
 #endif
 	default:
 		cifs_dbg(VFS, "Unknown vers= option specified: %s\n", value);