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//
// Copyright (C) 2012 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.
//
#include "update_engine/dbus_service.h"
#include <set>
#include <string>
#include <base/location.h>
#include <base/logging.h>
#include <base/strings/stringprintf.h>
#include <brillo/bind_lambda.h>
#include <brillo/message_loops/message_loop.h>
#include <brillo/strings/string_utils.h>
#include <policy/device_policy.h>
#include <update_engine/dbus-constants.h>
#include "update_engine/clock_interface.h"
#include "update_engine/connection_manager_interface.h"
#include "update_engine/hardware_interface.h"
#include "update_engine/omaha_request_params.h"
#include "update_engine/p2p_manager.h"
#include "update_engine/prefs.h"
#include "update_engine/update_attempter.h"
#include "update_engine/utils.h"
using base::StringPrintf;
using brillo::ErrorPtr;
using brillo::string_utils::ToString;
using std::set;
using std::string;
using update_engine::AttemptUpdateFlags;
using update_engine::kAttemptUpdateFlagNonInteractive;
namespace {
// Log and set the error on the passed ErrorPtr.
void LogAndSetError(ErrorPtr *error,
const tracked_objects::Location& location,
const string& reason) {
brillo::Error::AddTo(
error, location,
brillo::errors::dbus::kDomain,
update_engine::kUpdateEngineServiceErrorFailed, reason);
LOG(ERROR) << "Sending DBus Failure: " << location.ToString() << ": "
<< reason;
}
} // namespace
namespace chromeos_update_engine {
UpdateEngineService::UpdateEngineService(SystemState* system_state)
: system_state_(system_state) {}
// org::chromium::UpdateEngineInterfaceInterface methods implementation.
bool UpdateEngineService::AttemptUpdate(ErrorPtr* error,
const string& in_app_version,
const string& in_omaha_url) {
return AttemptUpdateWithFlags(
error, in_app_version, in_omaha_url, 0 /* no flags */);
}
bool UpdateEngineService::AttemptUpdateWithFlags(ErrorPtr* /* error */,
const string& in_app_version,
const string& in_omaha_url,
int32_t in_flags_as_int) {
AttemptUpdateFlags flags = static_cast<AttemptUpdateFlags>(in_flags_as_int);
bool interactive = !(flags & kAttemptUpdateFlagNonInteractive);
LOG(INFO) << "Attempt update: app_version=\"" << in_app_version << "\" "
<< "omaha_url=\"" << in_omaha_url << "\" "
<< "flags=0x" << std::hex << flags << " "
<< "interactive=" << (interactive? "yes" : "no");
system_state_->update_attempter()->CheckForUpdate(
in_app_version, in_omaha_url, interactive);
return true;
}
bool UpdateEngineService::AttemptRollback(ErrorPtr* error,
bool in_powerwash) {
LOG(INFO) << "Attempting rollback to non-active partitions.";
if (!system_state_->update_attempter()->Rollback(in_powerwash)) {
// TODO(dgarrett): Give a more specific error code/reason.
LogAndSetError(error, FROM_HERE, "Rollback attempt failed.");
return false;
}
return true;
}
bool UpdateEngineService::CanRollback(ErrorPtr* /* error */,
bool* out_can_rollback) {
bool can_rollback = system_state_->update_attempter()->CanRollback();
LOG(INFO) << "Checking to see if we can rollback . Result: " << can_rollback;
*out_can_rollback = can_rollback;
return true;
}
bool UpdateEngineService::ResetStatus(ErrorPtr* error) {
if (!system_state_->update_attempter()->ResetStatus()) {
// TODO(dgarrett): Give a more specific error code/reason.
LogAndSetError(error, FROM_HERE, "ResetStatus failed.");
return false;
}
return true;
}
bool UpdateEngineService::GetStatus(ErrorPtr* error,
int64_t* out_last_checked_time,
double* out_progress,
string* out_current_operation,
string* out_new_version,
int64_t* out_new_size) {
if (!system_state_->update_attempter()->GetStatus(out_last_checked_time,
out_progress,
out_current_operation,
out_new_version,
out_new_size)) {
LogAndSetError(error, FROM_HERE, "GetStatus failed.");
return false;
}
return true;
}
bool UpdateEngineService::RebootIfNeeded(ErrorPtr* error) {
if (!system_state_->update_attempter()->RebootIfNeeded()) {
// TODO(dgarrett): Give a more specific error code/reason.
LogAndSetError(error, FROM_HERE, "Reboot not needed, or attempt failed.");
return false;
}
return true;
}
bool UpdateEngineService::SetChannel(ErrorPtr* error,
const string& in_target_channel,
bool in_is_powerwash_allowed) {
const policy::DevicePolicy* device_policy = system_state_->device_policy();
// The device_policy is loaded in a lazy way before an update check. Load it
// now from the libchromeos cache if it wasn't already loaded.
if (!device_policy) {
UpdateAttempter* update_attempter = system_state_->update_attempter();
if (update_attempter) {
update_attempter->RefreshDevicePolicy();
device_policy = system_state_->device_policy();
}
}
bool delegated = false;
if (device_policy &&
device_policy->GetReleaseChannelDelegated(&delegated) && !delegated) {
LogAndSetError(
error, FROM_HERE,
"Cannot set target channel explicitly when channel "
"policy/settings is not delegated");
return false;
}
LOG(INFO) << "Setting destination channel to: " << in_target_channel;
if (!system_state_->request_params()->SetTargetChannel(
in_target_channel, in_is_powerwash_allowed)) {
// TODO(dgarrett): Give a more specific error code/reason.
LogAndSetError(error, FROM_HERE, "Setting channel failed.");
return false;
}
return true;
}
bool UpdateEngineService::GetChannel(ErrorPtr* /* error */,
bool in_get_current_channel,
string* out_channel) {
OmahaRequestParams* rp = system_state_->request_params();
*out_channel = (in_get_current_channel ?
rp->current_channel() : rp->target_channel());
return true;
}
bool UpdateEngineService::SetP2PUpdatePermission(ErrorPtr* error,
bool in_enabled) {
PrefsInterface* prefs = system_state_->prefs();
if (!prefs->SetBoolean(kPrefsP2PEnabled, in_enabled)) {
LogAndSetError(
error, FROM_HERE,
StringPrintf("Error setting the update via p2p permission to %s.",
ToString(in_enabled).c_str()));
return false;
}
return true;
}
bool UpdateEngineService::GetP2PUpdatePermission(ErrorPtr* error,
bool* out_enabled) {
PrefsInterface* prefs = system_state_->prefs();
bool p2p_pref = false; // Default if no setting is present.
if (prefs->Exists(kPrefsP2PEnabled) &&
!prefs->GetBoolean(kPrefsP2PEnabled, &p2p_pref)) {
LogAndSetError(error, FROM_HERE, "Error getting the P2PEnabled setting.");
return false;
}
*out_enabled = p2p_pref;
return true;
}
bool UpdateEngineService::SetUpdateOverCellularPermission(ErrorPtr* error,
bool in_allowed) {
set<string> allowed_types;
const policy::DevicePolicy* device_policy = system_state_->device_policy();
// The device_policy is loaded in a lazy way before an update check. Load it
// now from the libchromeos cache if it wasn't already loaded.
if (!device_policy) {
UpdateAttempter* update_attempter = system_state_->update_attempter();
if (update_attempter) {
update_attempter->RefreshDevicePolicy();
device_policy = system_state_->device_policy();
}
}
// Check if this setting is allowed by the device policy.
if (device_policy &&
device_policy->GetAllowedConnectionTypesForUpdate(&allowed_types)) {
LogAndSetError(error, FROM_HERE,
"Ignoring the update over cellular setting since there's "
"a device policy enforcing this setting.");
return false;
}
// If the policy wasn't loaded yet, then it is still OK to change the local
// setting because the policy will be checked again during the update check.
PrefsInterface* prefs = system_state_->prefs();
if (!prefs->SetBoolean(kPrefsUpdateOverCellularPermission, in_allowed)) {
LogAndSetError(error, FROM_HERE,
string("Error setting the update over cellular to ") +
(in_allowed ? "true" : "false"));
return false;
}
return true;
}
bool UpdateEngineService::GetUpdateOverCellularPermission(ErrorPtr* /* error */,
bool* out_allowed) {
ConnectionManagerInterface* cm = system_state_->connection_manager();
// The device_policy is loaded in a lazy way before an update check and is
// used to determine if an update is allowed over cellular. Load the device
// policy now from the libchromeos cache if it wasn't already loaded.
if (!system_state_->device_policy()) {
UpdateAttempter* update_attempter = system_state_->update_attempter();
if (update_attempter)
update_attempter->RefreshDevicePolicy();
}
// Return the current setting based on the same logic used while checking for
// updates. A log message could be printed as the result of this test.
LOG(INFO) << "Checking if updates over cellular networks are allowed:";
*out_allowed = cm->IsUpdateAllowedOver(
chromeos_update_engine::NetworkConnectionType::kCellular,
chromeos_update_engine::NetworkTethering::kUnknown);
return true;
}
bool UpdateEngineService::GetDurationSinceUpdate(ErrorPtr* error,
int64_t* out_usec_wallclock) {
base::Time time;
if (!system_state_->update_attempter()->GetBootTimeAtUpdate(&time)) {
LogAndSetError(error, FROM_HERE, "No pending update.");
return false;
}
ClockInterface* clock = system_state_->clock();
*out_usec_wallclock = (clock->GetBootTime() - time).InMicroseconds();
return true;
}
bool UpdateEngineService::GetPrevVersion(ErrorPtr* /* error */,
string* out_prev_version) {
*out_prev_version = system_state_->update_attempter()->GetPrevVersion();
return true;
}
bool UpdateEngineService::GetRollbackPartition(
ErrorPtr* /* error */,
string* out_rollback_partition_name) {
BootControlInterface::Slot rollback_slot =
system_state_->update_attempter()->GetRollbackSlot();
if (rollback_slot == BootControlInterface::kInvalidSlot) {
out_rollback_partition_name->clear();
return true;
}
string name;
if (!system_state_->boot_control()->GetPartitionDevice(
"KERNEL", rollback_slot, &name)) {
LOG(ERROR) << "Invalid rollback device";
return false;
}
LOG(INFO) << "Getting rollback partition name. Result: " << name;
*out_rollback_partition_name = name;
return true;
}
UpdateEngineAdaptor::UpdateEngineAdaptor(SystemState* system_state,
const scoped_refptr<dbus::Bus>& bus)
: org::chromium::UpdateEngineInterfaceAdaptor(&dbus_service_),
bus_(bus),
dbus_service_(system_state),
dbus_object_(nullptr,
bus,
dbus::ObjectPath(update_engine::kUpdateEngineServicePath)) {}
void UpdateEngineAdaptor::RegisterAsync(
const base::Callback<void(bool)>& completion_callback) {
RegisterWithDBusObject(&dbus_object_);
dbus_object_.RegisterAsync(completion_callback);
}
bool UpdateEngineAdaptor::RequestOwnership() {
return bus_->RequestOwnershipAndBlock(update_engine::kUpdateEngineServiceName,
dbus::Bus::REQUIRE_PRIMARY);
}
} // namespace chromeos_update_engine