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// Copyright (C) 2016 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
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
#include <inttypes.h>
#include <string>
#include <base/memory/ref_counted.h>
#include <brillo/errors/error.h>
#include "update_engine/system_state.h"
namespace chromeos_update_engine {
class UpdateEngineService {
// Flags used in the AttemptUpdateWithFlags() D-Bus method.
typedef enum {
kAttemptUpdateFlagNonInteractive = (1<<0)
} AttemptUpdateFlags;
// Error domain for all the service errors.
static const char* const kErrorDomain;
// Generic service error.
static const char* const kErrorFailed;
explicit UpdateEngineService(SystemState* system_state);
virtual ~UpdateEngineService() = default;
bool AttemptUpdate(brillo::ErrorPtr* error,
const std::string& in_app_version,
const std::string& in_omaha_url,
int32_t in_flags_as_int);
bool AttemptRollback(brillo::ErrorPtr* error, bool in_powerwash);
// Checks if the system rollback is available by verifying if the secondary
// system partition is valid and bootable.
bool CanRollback(brillo::ErrorPtr* error, bool* out_can_rollback);
// Resets the status of the update_engine to idle, ignoring any applied
// update. This is used for development only.
bool ResetStatus(brillo::ErrorPtr* error);
// Returns the current status of the Update Engine. If an update is in
// progress, the number of operations, size to download and overall progress
// is reported.
bool GetStatus(brillo::ErrorPtr* error,
int64_t* out_last_checked_time,
double* out_progress,
std::string* out_current_operation,
std::string* out_new_version,
int64_t* out_new_size);
// Reboots the device if an update is applied and a reboot is required.
bool RebootIfNeeded(brillo::ErrorPtr* error);
// Changes the current channel of the device to the target channel. If the
// target channel is a less stable channel than the current channel, then the
// channel change happens immediately (at the next update check). If the
// target channel is a more stable channel, then if is_powerwash_allowed is
// set to true, then also the change happens immediately but with a powerwash
// if required. Otherwise, the change takes effect eventually (when the
// version on the target channel goes above the version number of what the
// device currently has).
bool SetChannel(brillo::ErrorPtr* error,
const std::string& in_target_channel,
bool in_is_powerwash_allowed);
// If get_current_channel is set to true, populates |channel| with the name of
// the channel that the device is currently on. Otherwise, it populates it
// with the name of the channel the device is supposed to be (in case of a
// pending channel change).
bool GetChannel(brillo::ErrorPtr* error,
bool in_get_current_channel,
std::string* out_channel);
// Sets the current "cohort hint" value to |in_cohort_hint|. The cohort hint
// is sent back to Omaha on every request and can be used as a hint of what
// cohort should we be put on.
bool SetCohortHint(brillo::ErrorPtr* error, std::string in_cohort_hint);
// Return the current cohort hint. This value can be set with SetCohortHint()
// and can also be updated from Omaha on every update check request.
bool GetCohortHint(brillo::ErrorPtr* error, std::string* out_cohort_hint);
// Enables or disables the sharing and consuming updates over P2P feature
// according to the |enabled| argument passed.
bool SetP2PUpdatePermission(brillo::ErrorPtr* error, bool in_enabled);
// Returns the current value for the P2P enabled setting. This involves both
// sharing and consuming updates over P2P.
bool GetP2PUpdatePermission(brillo::ErrorPtr* error, bool* out_enabled);
// If there's no device policy installed, sets the update over cellular
// networks permission to the |allowed| value. Otherwise, this method returns
// with an error since this setting is overridden by the applied policy.
bool SetUpdateOverCellularPermission(brillo::ErrorPtr* error,
bool in_allowed);
// If there's no device policy installed, sets the update over cellular
// target. Otherwise, this method returns with an error.
bool SetUpdateOverCellularTarget(brillo::ErrorPtr* error,
const std::string& target_version,
int64_t target_size);
// Returns the current value of the update over cellular network setting,
// either forced by the device policy if the device is enrolled or the current
// user preference otherwise.
bool GetUpdateOverCellularPermission(brillo::ErrorPtr* error,
bool* out_allowed);
// Returns the duration since the last successful update, as the
// duration on the wallclock. Returns an error if the device has not
// updated.
bool GetDurationSinceUpdate(brillo::ErrorPtr* error,
int64_t* out_usec_wallclock);
// Returns the version string of OS that was used before the last reboot
// into an updated version. This is available only when rebooting into an
// update from previous version, otherwise an empty string is returned.
bool GetPrevVersion(brillo::ErrorPtr* error, std::string* out_prev_version);
// Returns the name of kernel partition that can be rolled back into.
bool GetRollbackPartition(brillo::ErrorPtr* error,
std::string* out_rollback_partition_name);
// Returns the last UpdateAttempt error.
bool GetLastAttemptError(brillo::ErrorPtr* error,
int32_t* out_last_attempt_error);
// Returns the current end-of-life status of the device. This value is updated
// on every update check and persisted on disk across reboots.
bool GetEolStatus(brillo::ErrorPtr* error, int32_t* out_eol_status);
SystemState* system_state_;
} // namespace chromeos_update_engine