upload android base code part6

android/system/vold/PrivateVolume.h

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ANDROID_VOLD_PRIVATE_VOLUME_H
+#define ANDROID_VOLD_PRIVATE_VOLUME_H
+
+#include "VolumeBase.h"
+
+#include <cutils/multiuser.h>
+
+namespace android {
+namespace vold {
+
+/*
+ * Private storage provided by an encrypted partition.
+ *
+ * Given a raw block device, it knows how to wrap it in dm-crypt and
+ * format as ext4/f2fs.  EmulatedVolume can be stacked above it.
+ *
+ * This volume is designed to behave much like the internal /data
+ * partition, both in layout and function.  For example, apps and
+ * private app data can be safely stored on this volume because the
+ * keys are tightly tied to this device.
+ */
+class PrivateVolume : public VolumeBase {
+public:
+    PrivateVolume(dev_t device, const std::string& keyRaw);
+    virtual ~PrivateVolume();
+
+protected:
+    status_t doCreate() override;
+    status_t doDestroy() override;
+    status_t doMount() override;
+    status_t doUnmount() override;
+    status_t doFormat(const std::string& fsType) override;
+
+    status_t readMetadata();
+
+private:
+    /* Kernel device of raw, encrypted partition */
+    dev_t mRawDevice;
+    /* Path to raw, encrypted block device */
+    std::string mRawDevPath;
+    /* Path to decrypted block device */
+    std::string mDmDevPath;
+    /* Path where decrypted device is mounted */
+    std::string mPath;
+
+    /* Encryption key as raw bytes */
+    std::string mKeyRaw;
+
+    /* Filesystem type */
+    std::string mFsType;
+    /* Filesystem UUID */
+    std::string mFsUuid;
+    /* User-visible filesystem label */
+    std::string mFsLabel;
+
+    DISALLOW_COPY_AND_ASSIGN(PrivateVolume);
+};
+
+}  // namespace vold
+}  // namespace android
+
+#endif