xl: Simplify reading metadata and add a new fileMetadata type. (#1346)

xl-v1-errors.go

@@ -0,0 +1,31 @@
+/*
+ * Minio Cloud Storage, (C) 2016 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package main
+
+import "errors"
+
+// errFileSize - returned for missing file size.
+var errFileSize = errors.New("Missing 'file.size' in metadata")
+
+// errMaxDisks - returned for reached maximum of disks.
+var errMaxDisks = errors.New("Total number of disks specified is higher than supported maximum of '16'")
+
+// errNumDisks - returned for odd numebr of disks.
+var errNumDisks = errors.New("Invalid number of disks provided, should be always multiples of '2'")
+
+// errModTime - returned for missing file modtime.
+var errModTime = errors.New("Missing 'file.modTime' in metadata")