//
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// Copyright (C) 2011 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "update_engine/omaha_request_params.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/utsname.h>
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#include <map>
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#include <string>
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#include <vector>
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#include <base/files/file_util.h>
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#include <base/strings/string_util.h>
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#include <base/strings/stringprintf.h>
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#include <brillo/key_value_store.h>
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#include <brillo/strings/string_utils.h>
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#include <policy/device_policy.h>
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#include "update_engine/common/constants.h"
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#include "update_engine/common/hardware_interface.h"
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#include "update_engine/common/platform_constants.h"
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#include "update_engine/common/utils.h"
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#include "update_engine/system_state.h"
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#define CALL_MEMBER_FN(object, member) ((object).*(member))
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using std::map;
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using std::string;
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using std::vector;
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namespace chromeos_update_engine {
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const char OmahaRequestParams::kOsVersion[] = "Indy";
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const char* kChannelsByStability[] = {
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// This list has to be sorted from least stable to most stable channel.
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"canary-channel",
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"dev-channel",
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"beta-channel",
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"stable-channel",
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};
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OmahaRequestParams::~OmahaRequestParams() {
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if (!root_.empty())
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test::SetImagePropertiesRootPrefix(nullptr);
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}
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bool OmahaRequestParams::Init(const string& in_app_version,
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const string& in_update_url,
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bool in_interactive) {
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LOG(INFO) << "Initializing parameters for this update attempt";
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image_props_ = LoadImageProperties(system_state_);
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mutable_image_props_ = LoadMutableImageProperties(system_state_);
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// Sanity check the channel names.
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if (!IsValidChannel(image_props_.current_channel))
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image_props_.current_channel = "stable-channel";
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if (!IsValidChannel(mutable_image_props_.target_channel))
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mutable_image_props_.target_channel = image_props_.current_channel;
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UpdateDownloadChannel();
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LOG(INFO) << "Running from channel " << image_props_.current_channel;
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os_platform_ = constants::kOmahaPlatformName;
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if (!image_props_.system_version.empty()) {
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if (in_app_version == "ForcedUpdate") {
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image_props_.system_version = in_app_version;
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}
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os_version_ = image_props_.system_version;
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} else {
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os_version_ = OmahaRequestParams::kOsVersion;
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}
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if (!in_app_version.empty())
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image_props_.version = in_app_version;
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os_sp_ = image_props_.version + "_" + GetMachineType();
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app_lang_ = "en-US";
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hwid_ = system_state_->hardware()->GetHardwareClass();
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if (CollectECFWVersions()) {
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fw_version_ = system_state_->hardware()->GetFirmwareVersion();
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ec_version_ = system_state_->hardware()->GetECVersion();
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}
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if (image_props_.current_channel == mutable_image_props_.target_channel) {
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// deltas are only okay if the /.nodelta file does not exist. if we don't
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// know (i.e. stat() returns some unexpected error), then err on the side of
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// caution and say deltas are not okay.
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struct stat stbuf;
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delta_okay_ =
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(stat((root_ + "/.nodelta").c_str(), &stbuf) < 0) && (errno == ENOENT);
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} else {
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LOG(INFO) << "Disabling deltas as a channel change to "
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<< mutable_image_props_.target_channel
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<< " is pending, with is_powerwash_allowed="
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<< utils::ToString(mutable_image_props_.is_powerwash_allowed);
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// For now, disable delta updates if the current channel is different from
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// the channel that we're sending to the update server because such updates
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// are destined to fail -- the current rootfs hash will be different than
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// the expected hash due to the different channel in /etc/lsb-release.
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delta_okay_ = false;
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}
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if (in_update_url.empty())
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update_url_ = image_props_.omaha_url;
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else
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update_url_ = in_update_url;
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// Set the interactive flag accordingly.
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interactive_ = in_interactive;
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dlc_module_ids_.clear();
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// Set false so it will do update by default.
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is_install_ = false;
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return true;
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}
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bool OmahaRequestParams::IsUpdateUrlOfficial() const {
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return (update_url_ == constants::kOmahaDefaultAUTestURL ||
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update_url_ == image_props_.omaha_url);
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}
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bool OmahaRequestParams::CollectECFWVersions() const {
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return base::StartsWith(
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hwid_, string("PARROT"), base::CompareCase::SENSITIVE) ||
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base::StartsWith(
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hwid_, string("SPRING"), base::CompareCase::SENSITIVE) ||
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base::StartsWith(hwid_, string("SNOW"), base::CompareCase::SENSITIVE);
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}
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bool OmahaRequestParams::SetTargetChannel(const string& new_target_channel,
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bool is_powerwash_allowed,
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string* error_message) {
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LOG(INFO) << "SetTargetChannel called with " << new_target_channel
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<< ", Is Powerwash Allowed = "
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<< utils::ToString(is_powerwash_allowed)
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<< ". Current channel = " << image_props_.current_channel
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<< ", existing target channel = "
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<< mutable_image_props_.target_channel
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<< ", download channel = " << download_channel_;
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if (!IsValidChannel(new_target_channel, error_message)) {
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return false;
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}
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MutableImageProperties new_props;
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new_props.target_channel = new_target_channel;
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new_props.is_powerwash_allowed = is_powerwash_allowed;
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if (!StoreMutableImageProperties(system_state_, new_props)) {
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if (error_message)
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*error_message = "Error storing the new channel value.";
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return false;
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}
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mutable_image_props_ = new_props;
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return true;
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}
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void OmahaRequestParams::UpdateDownloadChannel() {
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if (download_channel_ != mutable_image_props_.target_channel) {
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download_channel_ = mutable_image_props_.target_channel;
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LOG(INFO) << "Download channel for this attempt = " << download_channel_;
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}
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}
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string OmahaRequestParams::GetMachineType() const {
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struct utsname buf;
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string ret;
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if (uname(&buf) == 0)
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ret = buf.machine;
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return ret;
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}
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bool OmahaRequestParams::IsValidChannel(const string& channel,
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string* error_message) const {
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if (image_props_.allow_arbitrary_channels) {
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if (!base::EndsWith(channel, "-channel", base::CompareCase::SENSITIVE)) {
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if (error_message) {
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*error_message = base::StringPrintf(
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"Invalid channel name \"%s\", must ends with -channel.",
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channel.c_str());
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}
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return false;
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}
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return true;
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}
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if (GetChannelIndex(channel) < 0) {
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string valid_channels = brillo::string_utils::JoinRange(
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", ", std::begin(kChannelsByStability), std::end(kChannelsByStability));
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if (error_message) {
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*error_message =
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base::StringPrintf("Invalid channel name \"%s\", valid names are: %s",
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channel.c_str(),
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valid_channels.c_str());
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}
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return false;
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}
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return true;
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}
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void OmahaRequestParams::set_root(const string& root) {
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root_ = root;
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test::SetImagePropertiesRootPrefix(root_.c_str());
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}
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int OmahaRequestParams::GetChannelIndex(const string& channel) const {
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for (size_t t = 0; t < arraysize(kChannelsByStability); ++t)
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if (channel == kChannelsByStability[t])
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return t;
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return -1;
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}
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bool OmahaRequestParams::ToMoreStableChannel() const {
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int current_channel_index = GetChannelIndex(image_props_.current_channel);
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int download_channel_index = GetChannelIndex(download_channel_);
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return download_channel_index > current_channel_index;
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}
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bool OmahaRequestParams::ShouldPowerwash() const {
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if (!mutable_image_props_.is_powerwash_allowed)
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return false;
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// If arbitrary channels are allowed, always powerwash on channel change.
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if (image_props_.allow_arbitrary_channels)
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return image_props_.current_channel != download_channel_;
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// Otherwise only powerwash if we are moving from less stable (higher version)
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// to more stable channel (lower version).
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return ToMoreStableChannel();
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}
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string OmahaRequestParams::GetAppId() const {
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return download_channel_ == "canary-channel" ? image_props_.canary_product_id
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: image_props_.product_id;
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}
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} // namespace chromeos_update_engine
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