<!DOCTYPE node PUBLIC "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd">
<node name="/org/chromium/SessionManager"
      xmlns:doc="http://www.freedesktop.org/dbus/1.0/doc.dtd">
<!--
  Copyright (c) 2012 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.

-->

  <!-- ********************************************************************* -->

  <!--
      org.chromium.SessionManagerInterface:
      @short_description: User session manager.

      Interface for user session manager. Also handles persisting and
      retrieving device and per-user enterprise policy blobs and
      brokering certain privileged operations on the browser's behalf.
  -->
  <interface name="org.chromium.SessionManagerInterface">

    <!--
        EmitLoginPromptVisible:

        Emits the "login-prompt-visible" upstart signal and LoginPromptVisible
        DBus signal on the browser's behalf.
    -->
    <method name="EmitLoginPromptVisible">
      <annotation name="org.chromium.DBus.Method.Kind" value="simple" />
    </method>

    <!--
        LoginPromptVisible:

        Emitted when the browser indicates that the sign in screen is visible.
    -->
    <signal name="LoginPromptVisible" />

    <!--
        EnableChromeTesting:
        @force_relaunch: Restart the browser no matter what.
        @extra_arguments: Extra command line arguments to pass on restart.
        @filepath: The named pipe to be used for testing communication.

        Restarts the browser, leaving it open for testing automation.
        Adds an argument to the chrome child job command line that causes it,
        upon restart, to open a testing channel. Next, kills and restarts
        chrome. The name of the pipe to be used for testing is returned in
        @filepath.
        If @force_relaunch is true, Chrome will be restarted with each
        invocation. Otherwise, it will only be restarted if
        automation is not yet enabled.  @extra_arguments can
        include any additional arguments that need to be passed to
        Chrome on subsequent launches.
    -->
    <method name="EnableChromeTesting">
      <arg type="b" name="force_relaunch" direction="in" />
      <arg type="as" name="extra_arguments" direction="in" />
      <arg type="s" name="filepath" direction="out" />
    </method>

    <!--
        StartSession:
        @account_id: Account ID of the user to start a session for.
        @unique_identifier: Unused.

        Updates bookkeeping to know about a session for @account_id. Also emits
        "start-user-session" upstart signal (asynchronously) and
        "SessionStateChanged:started" D-Bus signal.
    -->
    <method name="StartSession">
      <arg type="s" name="account_id" direction="in" />
      <arg type="s" name="unique_identifier" direction="in" />
    </method>

    <!--
        StopSession:
        @unique_identifier: Unused.

        Terminates all active user sessions, announces this over upstart
        ("stop-user-session") and DBus (SessionStateChanges:stopped).
    -->
    <method name="StopSession">
      <arg type="s" name="unique_identifier" direction="in" />
      <annotation name="org.chromium.DBus.Method.Kind" value="simple" />
    </method>

    <!--
        SessionStateChanged:
        @state: State the device has changed to.

        Signal emitted to announce session state changes. Supported values for
        @state include <quote>started</quote>, <quote>stopping</quote>, and
        <quote>stopped</quote>.
    -->
    <signal name="SessionStateChanged">
      <arg type="s" name="state" />
    </signal>

    <!--
        StorePolicy:
        @policy_blob: Serialized protobuf containing a device policy and a
                      signature over that policy.

        Stores a device policy. This method will verify the sig in @policy_blob
        and persist the blob to disk.
        The signature is a SHA1 with RSA signature over the policy,
        verifiable with the device-wide policy key.
    -->
    <method name="StorePolicy">
      <arg type="ay" name="policy_blob" direction="in" />
    </method>

    <!--
        StoreUnsignedPolicy:
        @policy_blob: Serialized protobuf containing device policy.

        Stores device policy without signature verification for AD managed
        devices. Locked down through busconfig to be only callable by
        authpolicyd and exits with an error if install attributes are not locked
        to enterprise_ad device mode.
    -->
    <method name="StoreUnsignedPolicy">
      <arg type="ay" name="policy_blob" direction="in" />
    </method>

    <!--
        RetrievePolicy:
        @policy_blob: Serialized protobuf containing a device policy and a
                      signature over that policy.

        Retrieve device policy stored by StorePolicy.
    -->
    <method name="RetrievePolicy">
      <arg type="ay" name="policy_blob" direction="out" />
    </method>

    <!--
        StorePolicyForUser:
        @account_id: Account ID of the user whose policy is to be stored.
        @policy_blob: A serialized PolicyFetchResponse protobuf.

        Similar to StorePolicy() above, but for user policy.
        @policy_blob should contain a serialized PolicyFetchResponse protobuf
        which wraps the actual policy data along with an SHA1-RSA signature
        over the policy data. The policy data is opaque to session_manager,
        the exact definition is only relevant to client code in Chrome.

        Calling this function attempts to persist the policy blob for
        a given user. Policy is stored in a root-owned location
        within the user's cryptohome (for privacy reasons). The
        first attempt to store policy also installs the signing
        key for user policy. This key is used later to verify policy
        updates pushed by Chrome.
    -->
    <method name="StorePolicyForUser">
      <arg type="s" name="account_id" direction="in" />
      <arg type="ay" name="policy_blob" direction="in" />
    </method>

    <!--
        StoreUnsignedPolicyForUser:
        @account_id: Account ID of the user whose policy is to be stored.
        @policy_blob: A serialized PolicyFetchResponse protobuf.

        Similar to StoreUnsignedPolicy() above, but for user policy.

        Stores user policy without signature verification for AD managed
        devices. Locked down through busconfig to be only callable by
        authpolicyd and exits with an error if install attributes are not locked
        to enterprise_ad device mode. The policy data is opaque to
        session_manager, the exact definition is only relevant to client code in
        Chrome.

        Calling this function attempts to persist the policy blob for a given
        user. Policy is stored in a root-owned location within the user's
        cryptohome (for privacy reasons and to prevent tampering by other system
        components).
    -->
    <method name="StoreUnsignedPolicyForUser">
      <arg type="s" name="account_id" direction="in" />
      <arg type="ay" name="policy_blob" direction="in" />
    </method>

    <!--
        RetrievePolicyForUser:
        @account_id: Account ID of the user whose policy the caller wants.
        @policy_blob: Serialized protobuf containing a PolicyFetchResponse and a
                      signature over that policy.

        Retrieves user policy for a given user.
    -->
    <method name="RetrievePolicyForUser">
      <arg type="s" name="account_id" direction="in" />
      <arg type="ay" name="policy_blob" direction="out" />
    </method>

    <!--
        StoreDeviceLocalAccountPolicy:
        @account_id: Account whose policy is to be stored.
        @policy_blob: A serialized PolicyFetchResponse protobuf.

        Similar to StorePolicyForUser() above, but for device-local
        accounts. @policy_blob should contain a serialized
        PolicyFetchResponse protobuf which wraps the actual policy
        data along with an SHA1-RSA signature over the policy
        data. The policy data is opaque to session manager, the exact
        definition is only relevant to client code in Chrome.

        Calling this function attempts to persist the policy blob for
        the device-local account specified in the method call. Policy
        is stored in the root-owned /var/lib/device_local_accounts
        directory in the stateful partition. Signatures are checked
        against the owner key, key rotation is not allowed.
    -->
    <method name="StoreDeviceLocalAccountPolicy">
      <arg type="s" name="account_id" direction="in" />
      <arg type="ay" name="policy_blob" direction="in" />
    </method>

    <!--
        RetrieveDeviceLocalAccountPolicy:
        @account_id: Account ID of the user whose policy is to be stored.
        @policy_blob: Serialized protobuf containing a PolicyFetchResponse and a
                      signature over that policy.

        Retrieves device-local account policy for the specified @account_id.
    -->
    <method name="RetrieveDeviceLocalAccountPolicy">
      <arg type="s" name="account_id" direction="in" />
      <arg type="ay" name="policy_blob" direction="out" />
    </method>

    <!--
        SetOwnerKeyComplete:
        Defined as login_manager::kOwnerKeySetSignal, broadcast when the request
        to persist the policy key was completed.
        @success: A string value with either "success" or "failure" indicating
                  whether the policy key was actually persisted.
    -->
    <signal name="SetOwnerKeyComplete">
      <arg type="s" name="success" />
    </signal>

    <!--
        PropertyChangeComplete:
        Broadcast when a request to persist the policy blob file on disk was
        completed.
        @success: A string value with either "success" or "failure" indicating
                  whether the policy blob was actually persisted.
    -->
    <signal name="PropertyChangeComplete">
      <arg type="s" name="success" />
    </signal>

    <!--
        RetrieveSessionState:
        @state: The current session state.

        Get information about the current session. Will be one of
        <quote>started</quote>, <quote>stopping</quote>, <quote>stopped</quote>.
    -->
    <method name="RetrieveSessionState">
      <arg type="s" name="state" direction="out" />
    </method>

    <!--
        RetrieveActiveSessions:
        @sessions: A map describing the currently active user sessions.

        Enumerate active user sessions.
        @sessions is a dictionary mapping { username: sanitized_user_name }.
    -->
    <method name="RetrieveActiveSessions">
      <arg type="a{ss}" name="sessions" direction="out" />
    </method>

    <!--
	HandleSupervisedUserCreationStarting:

        Handle notification from Chrome that creation of a supervised user is
        underway. Browser crashes will trigger session termination until
        someone calls HandleSupervisedUserCreationFinished.
    -->
    <method name="HandleSupervisedUserCreationStarting">
    </method>

    <!--
	HandleSupervisedUserCreationFinished:

        Handle notification from Chrome that creation of a supervised user is
        completed. Browser crashes will once again trigger a browser restart.
    -->
    <method name="HandleSupervisedUserCreationFinished">
    </method>

    <!--
        LockScreen:

        Allows other processes to request screen locking.
        Emits LockScreen signal to Chromium Browser to tell it to lock the
        screen. The browser should call the HandleScreenLocked
        method when the screen is actually locked.
    -->
    <method name="LockScreen">
    </method>

    <!--
        HandleLockScreenShown:

        Handle notification from Chrome that the lock screen is visible.
        Emits ScreenIsLocked.
    -->
    <method name="HandleLockScreenShown">
    </method>

    <!--
        HandleLockScreenDismissed:

        Handle notification from Chrome that the lock screen is hidden.
        Emits ScreenIsUnlocked.
    -->
    <method name="HandleLockScreenDismissed">
    </method>

    <!--
        ScreenIsLocked:
        Broadcast that the browser locked the screen.
    -->
    <signal name="ScreenIsLocked">
    </signal>
    <!--
        ScreenIsUnlocked:
        Broadcast that the browser unlocked the screen.
    -->
    <signal name="ScreenIsUnlocked">
    </signal>

    <!--
        RestartJob:
        @cred_fd: File descriptor that provides PID to be restarted.
        @argv: Command line arguments to restart the job with.

        Restarts job with pid returned when querying @cred_fd using
        SO_PEERCRED, replacing its command line arguments with those provided.
        Only works for the browser process managed by the SessionManager.
    -->
    <method name="RestartJob">
      <arg type="h" name="cred_fd" direction="in" />
      <arg type="as" name="argv" direction="in" />
    </method>

    <!--
        StartDeviceWipe:

        Sets the device up to "Powerwash" on reboot, and triggers a reboot.
    -->
    <method name="StartDeviceWipe" />

    <!--
        SetFlagsForUser:
        @account_id: Account ID of the user to set flags for.
        @flags: array of flags to be set for the user.

        Sets browser @flags to be applied on next in-session restart.
    -->
    <method name="SetFlagsForUser">
      <arg type="s" name="account_id" direction="in" />
      <arg type="as" name="flags" direction="in" />
    </method>

    <!--
        GetServerBackedStateKeys:
        @state_keys: The array of currently valid state keys.

        Requests server-backed state keys to be computed and returned. A
        server-backed state key is an opaque client-determined identifier that's
        used to stage state in a server to be retrieved after device
        recovery. These are used to figure out device state such as previous
        enrollment domain and whether the device got marked as stolen by its
        owner. The keys are time-dependent, with each key being valid only for a
        window of time, and based on system time this call returns the currently
        valid state key plus a number of subsequent state keys (all sorted by
        time in ascending order) that span approximately a year of time in
        coverage. It is the responsibility of the caller to ensure that the
        system time is accurate before starting the request!
    -->
    <method name="GetServerBackedStateKeys">
      <arg type="aay" name="state_keys" direction="out" />
    </method>

    <!--
        InitMachineInfo:
        @data: A string containing newline-separated key=value pairs.

        Initializes supplemental machine information for use by session manager
        that has be asynchronously determined in the boot process after
        starting session_manager. This method gets invoked by the ui-init-late
        init job; nothing else should call this method.
    -->
    <method name="InitMachineInfo">
      <arg type="s" name="data" direction="in" />
    </method>

    <!--
        StartContainer:
        @name: A string containing the name of the container to start.

        Starts a container.  Containers must be bundled with the rootfs so they
        are signed.
    -->
    <method name="StartContainer">
      <arg type="s" name="name" direction="in" />
    </method>

    <!--
        StopContainer:
        @name: A string containing the name of the container to stop.

        Stops a currently running container.
    -->
    <method name="StopContainer">
      <arg type="s" name="name" direction="in" />
    </method>

    <!--
        StartArcInstance:
        @request: Serialized StartArcInstanceRequest proto message containing
                  ARC startup options.
        @container_instance_id: Output parameter containing an opaque
                  identifier for the container instance. The
                  ArcInstanceStopped signal will contain the same identifier.

        Starts an ARC instance. Only one instance of ARC can be executing at a
        given point in time. This method is only available if the board
        supports ARC. This method gets invoked by Chrome.
    -->
    <method name="StartArcInstance">
      <arg type="ay" name="request" direction="in" />
      <arg type="s" name="container_instance_id" direction="out" />
    </method>

    <!--
        StopArcInstance:

        Stops the currently running ARC instance. Used to manually stop the ARC
        instance. If the instance is not running, this will result in a no-op.
        If this method is not called, session_manager will still stop the
        instance when the user's session ends. This method is only available if
        the board supports ARC. This method gets invoked by Chrome.
    -->
    <method name="StopArcInstance">
    </method>

    <!--
        SetArcCpuRestriction:
        @restriction_state: State used to set the level of CPU allowed specified
        as foreground or background with the
        |login_manager::ContainerCpuRestrictionState| enum.

        Adjusts the amount of CPU the ARC instance is allowed to use by setting
        the cpu.shares value of ARC's cpu cgroup.  When restriction_state is
        CONTAINER_CPU_RESTRICTION_FOREGROUND the limit is adjusted so ARC can
        use all the system's CPU if needed.  When restriction_state is
        CONTAINER_CPU_RESTRICTION_BACKGROUND, cpu.shares is set back to a
        tightly restricted level.  The ARC container is started in a state that
        is more restricted than CONTAINER_CPU_RESTRICTION_BACKGROUND.  This
        startup state is to allow Chrome to restore during login and can't be
        re-entered after startup is complete.
        Calling the method while the instance is not running *is* okay as long
        as the cgroups exist.
    -->
    <method name="SetArcCpuRestriction">
      <arg type="u" name="restriction_state" direction="in" />
    </method>

    <!--
        EmitArcBooted:

        Emits the "arc-booted" upstart signal on the browser's behalf.
    -->
    <method name="EmitArcBooted">
      <arg type="s" name="account_id" direction="in" />
    </method>

    <!--
        GetArcStartTimeTicks:

        Returns the value of start time (base::TimeTicks::ToInternalValue()) of
        the ARC instance if exists, otherwise an error will be returned
        accordingly i.e. ARC is not available on the platform or ARC is not
        started.
    -->
    <method name="GetArcStartTimeTicks">
      <arg type="x" name="start_time" direction="out" />
    </method>
    <!--
         RemoveArcData:
         @account_id: Account ID of the user whose ARC data is removed.

         Removes ARC data from the user's profile.  This does not remove ARC
         system data such as root images.
    -->
    <method name="RemoveArcData">
      <arg type="s" name="account_id" direction="in" />
    </method>
  </interface>
  <!-- ********************************************************************* -->
</node>