From f4f4f606718497a2f660cdb737b812e035f55311 Mon Sep 17 00:00:00 2001
From: "Joe Richey joerichey@google.com" <joerichey@google.com>
Date: Tue, 23 May 2017 18:45:58 -0700
Subject: filesystem: creating the directories and files

This commit adds in the filesystem subpackage. The goal of this package
is to provide and interface for adding to and removing from the metadata
storage for a given filesystem. This is primarily done in filesystem.go.
To facilitate this functionality, mountpoint.go exposes an interface for
querying the system about the current mounted filesystems and their
information. Note that this operation is done with a lazy loading
mechanism.

To refer to other filesystems, we use link files that can be parsed by
libblkid. The README is also updated to account for this new dependancy.

This package uses the FSError type under the hood so that error messages
will include the filesystem name, but callers can still check for
specific error instances.

Change-Id: I74fe4e84b8e3a5b73f1337c35307ffe0bf7cdea9
---
 filesystem/mountpoint_test.go | 76 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 filesystem/mountpoint_test.go

(limited to 'filesystem/mountpoint_test.go')

diff --git a/filesystem/mountpoint_test.go b/filesystem/mountpoint_test.go
new file mode 100644
index 0000000..2840826
--- /dev/null
+++ b/filesystem/mountpoint_test.go
@@ -0,0 +1,76 @@
+/*
+ * mountpoint_test.go - Tests for reading information about all mountpoints.
+ *
+ * Copyright 2017 Google Inc.
+ * Author: Joe Richey (joerichey@google.com)
+ *
+ * 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 filesystem
+
+import (
+	"fmt"
+	"testing"
+)
+
+func printMountInfo() {
+	fmt.Println("\nBy Mountpoint:")
+	for _, mnt := range mountsByPath {
+		fmt.Println("\t" + mnt.Path)
+		fmt.Println("\t\tFilesystem: " + mnt.Filesystem)
+		fmt.Printf("\t\tOptions:    %v\n", mnt.Options)
+		fmt.Println("\t\tDevice:     " + mnt.Device)
+	}
+
+	fmt.Println("\nBy Device:")
+	for device, mnts := range mountsByDevice {
+		fmt.Println("\t" + device)
+		for _, mnt := range mnts {
+			fmt.Println("\t\tPath: " + mnt.Path)
+		}
+	}
+}
+
+func printSupportedMounts() {
+	fmt.Println("\nSupported Mountpoints:")
+	for _, mnt := range AllSupportedFilesystems() {
+		fmt.Println("\t" + mnt.Path)
+		fmt.Println("\t\tFilesystem: " + mnt.Filesystem)
+		fmt.Printf("\t\tOptions:    %v\n", mnt.Options)
+		fmt.Println("\t\tDevice:     " + mnt.Device)
+	}
+}
+
+func TestLoadMountInfo(t *testing.T) {
+	if err := UpdateMountInfo(); err != nil {
+		t.Error(err)
+	}
+}
+
+func TestPrintMountInfo(t *testing.T) {
+	// Uncomment to see the mount info in the tests
+	// printMountInfo()
+	// printSupportedMounts()
+	// t.Fail()
+}
+
+// Benchmarks how long it takes to update the mountpoint data
+func BenchmarkLoadFirst(b *testing.B) {
+	for n := 0; n < b.N; n++ {
+		err := UpdateMountInfo()
+		if err != nil {
+			b.Fatal(err)
+		}
+	}
+}
-- 
cgit v1.3