1// 2// Copyright (C) 2015 The Android Open Source Project 3// 4// Licensed under the Apache License, Version 2.0 (the "License"); 5// you may not use this file except in compliance with the License. 6// You may obtain a copy of the License at 7// 8// http://www.apache.org/licenses/LICENSE-2.0 9// 10// Unless required by applicable law or agreed to in writing, software 11// distributed under the License is distributed on an "AS IS" BASIS, 12// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13// See the License for the specific language governing permissions and 14// limitations under the License. 15// 16 17#include "update_engine/image_properties.h" 18 19#include <string> 20 21#include <base/logging.h> 22#include <brillo/osrelease_reader.h> 23 24#include "update_engine/common/boot_control_interface.h" 25#include "update_engine/common/constants.h" 26#include "update_engine/common/platform_constants.h" 27#include "update_engine/common/prefs_interface.h" 28#include "update_engine/system_state.h" 29 30namespace chromeos_update_engine { 31 32namespace { 33 34// Build time properties name used in Brillo. 35const char kProductId[] = "product_id"; 36const char kProductVersion[] = "product_version"; 37 38// Prefs used to store the target channel and powerwash settings. 39const char kPrefsImgPropChannelName[] = "img-prop-channel-name"; 40const char kPrefsImgPropPowerwashAllowed[] = "img-prop-powerwash-allowed"; 41 42std::string GetStringWithDefault(const brillo::OsReleaseReader& osrelease, 43 const std::string& key, 44 const std::string& default_value) { 45 std::string result; 46 if (osrelease.GetString(key, &result)) 47 return result; 48 LOG(INFO) << "Cannot load ImageProperty " << key << ", using default value " 49 << default_value; 50 return default_value; 51} 52 53} // namespace 54 55namespace test { 56void SetImagePropertiesRootPrefix(const char* /* test_root_prefix */) {} 57} // namespace test 58 59ImageProperties LoadImageProperties(SystemState* system_state) { 60 ImageProperties result; 61 62 brillo::OsReleaseReader osrelease; 63 osrelease.Load(); 64 result.product_id = GetStringWithDefault( 65 osrelease, kProductId, "developer-boards:brillo-starter-board"); 66 result.canary_product_id = result.product_id; 67 result.version = GetStringWithDefault(osrelease, kProductVersion, "0.0.0.0"); 68 69 result.board = "brillo"; 70 71 // Brillo images don't have a channel assigned. We stored the name of the 72 // channel where we got the image from in prefs at the time of the update, so 73 // we use that as the current channel if available. During provisioning, there 74 // is no value assigned, so we default to the "stable-channel". 75 std::string current_channel_key = 76 kPrefsChannelOnSlotPrefix + 77 std::to_string(system_state->boot_control()->GetCurrentSlot()); 78 std::string current_channel; 79 if (!system_state->prefs()->Exists(current_channel_key) || 80 !system_state->prefs()->GetString(current_channel_key, ¤t_channel)) 81 current_channel = "stable-channel"; 82 result.current_channel = current_channel; 83 84 // Brillo only supports the official omaha URL. 85 result.omaha_url = constants::kOmahaDefaultProductionURL; 86 87 return result; 88} 89 90MutableImageProperties LoadMutableImageProperties(SystemState* system_state) { 91 MutableImageProperties result; 92 PrefsInterface* const prefs = system_state->prefs(); 93 if (!prefs->GetString(kPrefsImgPropChannelName, &result.target_channel)) 94 result.target_channel.clear(); 95 if (!prefs->GetBoolean(kPrefsImgPropPowerwashAllowed, 96 &result.is_powerwash_allowed)) { 97 result.is_powerwash_allowed = false; 98 } 99 return result; 100} 101 102bool StoreMutableImageProperties(SystemState* system_state, 103 const MutableImageProperties& properties) { 104 PrefsInterface* const prefs = system_state->prefs(); 105 return ( 106 prefs->SetString(kPrefsImgPropChannelName, properties.target_channel) && 107 prefs->SetBoolean(kPrefsImgPropPowerwashAllowed, 108 properties.is_powerwash_allowed)); 109} 110 111} // namespace chromeos_update_engine 112