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diff --git a/brillo/udev/udev_device.h b/brillo/udev/udev_device.h
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+++ b/brillo/udev/udev_device.h
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+// Copyright (c) 2013 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef LIBBRILLO_BRILLO_UDEV_UDEV_DEVICE_H_
+#define LIBBRILLO_BRILLO_UDEV_UDEV_DEVICE_H_
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <memory>
+
+#include <base/macros.h>
+#include <brillo/brillo_export.h>
+#include <brillo/udev/udev_list_entry.h>
+
+struct udev_device;
+
+namespace brillo {
+
+// A udev device, which wraps a udev_device C struct from libudev and related
+// library functions into a C++ object.
+class BRILLO_EXPORT UdevDevice {
+ public:
+  // Constructs a UdevDevice object by taking a raw pointer to a udev_device
+  // struct as |device|. The ownership of |device| is not transferred, but its
+  // reference count is increased by one during the lifetime of this object.
+  explicit UdevDevice(udev_device* device);
+
+  // Destructs this UdevDevice object and decreases the reference count of the
+  // underlying udev_device struct by one.
+  virtual ~UdevDevice();
+
+  // Wraps udev_device_get_parent().
+  virtual std::unique_ptr<UdevDevice> GetParent() const;
+
+  // Wraps udev_device_get_parent_with_subsystem_devtype().
+  virtual std::unique_ptr<UdevDevice> GetParentWithSubsystemDeviceType(
+      const char* subsystem, const char* device_type) const;
+
+  // Wraps udev_device_get_is_initialized().
+  virtual bool IsInitialized() const;
+
+  // Wraps udev_device_get_usec_since_initialized().
+  virtual uint64_t GetMicrosecondsSinceInitialized() const;
+
+  // Wraps udev_device_get_seqnum().
+  virtual uint64_t GetSequenceNumber() const;
+
+  // Wraps udev_device_get_devpath().
+  virtual const char* GetDevicePath() const;
+
+  // Wraps udev_device_get_devnode().
+  virtual const char* GetDeviceNode() const;
+
+  // Wraps udev_device_get_devnum().
+  virtual dev_t GetDeviceNumber() const;
+
+  // Wraps udev_device_get_devtype().
+  virtual const char* GetDeviceType() const;
+
+  // Wraps udev_device_get_driver().
+  virtual const char* GetDriver() const;
+
+  // Wraps udev_device_get_subsystem().
+  virtual const char* GetSubsystem() const;
+
+  // Wraps udev_device_get_syspath().
+  virtual const char* GetSysPath() const;
+
+  // Wraps udev_device_get_sysname().
+  virtual const char* GetSysName() const;
+
+  // Wraps udev_device_get_sysnum().
+  virtual const char* GetSysNumber() const;
+
+  // Wraps udev_device_get_action().
+  virtual const char* GetAction() const;
+
+  // Wraps udev_device_get_devlinks_list_entry().
+  virtual std::unique_ptr<UdevListEntry> GetDeviceLinksListEntry() const;
+
+  // Wraps udev_device_get_properties_list_entry().
+  virtual std::unique_ptr<UdevListEntry> GetPropertiesListEntry() const;
+
+  // Wraps udev_device_get_property_value().
+  virtual const char* GetPropertyValue(const char* key) const;
+
+  // Wraps udev_device_get_tags_list_entry().
+  virtual std::unique_ptr<UdevListEntry> GetTagsListEntry() const;
+
+  // Wraps udev_device_get_sysattr_list_entry().
+  virtual std::unique_ptr<UdevListEntry> GetSysAttributeListEntry() const;
+
+  // Wraps udev_device_get_sysattr_value().
+  virtual const char* GetSysAttributeValue(const char* attribute) const;
+
+  // Creates a copy of this UdevDevice pointing to the same underlying
+  // struct udev_device* (increasing its libudev reference count by 1).
+  virtual std::unique_ptr<UdevDevice> Clone();
+
+ private:
+  // Allows MockUdevDevice to invoke the private default constructor below.
+  friend class MockUdevDevice;
+
+  // Constructs a UdevDevice object without referencing a udev_device struct,
+  // which is only allowed to be called by MockUdevDevice.
+  UdevDevice();
+
+  udev_device* device_;
+
+  DISALLOW_COPY_AND_ASSIGN(UdevDevice);
+};
+
+}  // namespace brillo
+
+#endif  // LIBBRILLO_BRILLO_UDEV_UDEV_DEVICE_H_