blob: 38262a92b42eec7919d10a1598d06724c3a05a59 [file] [log] [blame]
// Copyright (c) 2011 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.
#include "update_engine/omaha_request_params.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/utsname.h>
#include <map>
#include <string>
#include <vector>
#include <base/file_util.h>
#include <base/string_util.h>
#include <policy/device_policy.h>
#include "update_engine/constants.h"
#include "update_engine/simple_key_value_store.h"
#include "update_engine/system_state.h"
#include "update_engine/utils.h"
#define CALL_MEMBER_FN(object, member) ((object).*(member))
using std::map;
using std::string;
using std::vector;
namespace chromeos_update_engine {
const char* const OmahaRequestParams::kAppId(
"{87efface-864d-49a5-9bb3-4b050a7c227a}");
const char* const OmahaRequestParams::kOsPlatform("Chrome OS");
const char* const OmahaRequestParams::kOsVersion("Indy");
const char* const kProductionOmahaUrl(
"https://tools.google.com/service/update2");
const char* const OmahaRequestParams::kUpdateChannelKey(
"CHROMEOS_RELEASE_TRACK");
const char* const OmahaRequestParams::kIsPowerwashAllowedKey(
"CHROMEOS_IS_POWERWASH_ALLOWED");
const char* kChannelsByStability[] = {
// This list has to be sorted from least stable to most stable channel.
"canary-channel",
"dev-channel",
"beta-channel",
"stable-channel",
};
bool OmahaRequestParams::Init(const std::string& in_app_version,
const std::string& in_update_url,
bool in_interactive) {
LOG(INFO) << "Initializing parameters for this update attempt";
InitFromLsbValue();
bool stateful_override = !ShouldLockDown();
os_platform_ = OmahaRequestParams::kOsPlatform;
os_version_ = OmahaRequestParams::kOsVersion;
app_version_ = in_app_version.empty() ?
GetLsbValue("CHROMEOS_RELEASE_VERSION", "", NULL, stateful_override) :
in_app_version;
os_sp_ = app_version_ + "_" + GetMachineType();
os_board_ = GetLsbValue("CHROMEOS_RELEASE_BOARD",
"",
NULL,
stateful_override);
string release_app_id = GetLsbValue("CHROMEOS_RELEASE_APPID",
OmahaRequestParams::kAppId,
NULL,
stateful_override);
board_app_id_ = GetLsbValue("CHROMEOS_BOARD_APPID",
release_app_id,
NULL,
stateful_override);
canary_app_id_ = GetLsbValue("CHROMEOS_CANARY_APPID",
release_app_id,
NULL,
stateful_override);
app_lang_ = "en-US";
hwid_ = utils::GetHardwareClass();
if (CollectECFWVersions()) {
fw_version_ = utils::GetFirmwareVersion();
ec_version_ = utils::GetECVersion(NULL);
}
if (current_channel_ == target_channel_) {
// deltas are only okay if the /.nodelta file does not exist. if we don't
// know (i.e. stat() returns some unexpected error), then err on the side of
// caution and say deltas are not okay.
struct stat stbuf;
delta_okay_ = (stat((root_ + "/.nodelta").c_str(), &stbuf) < 0) &&
(errno == ENOENT);
} else {
LOG(INFO) << "Disabling deltas as a channel change is pending";
// For now, disable delta updates if the current channel is different from
// the channel that we're sending to the update server because such updates
// are destined to fail -- the current rootfs hash will be different than
// the expected hash due to the different channel in /etc/lsb-release.
delta_okay_ = false;
}
if (in_update_url.empty())
update_url_ = GetLsbValue("CHROMEOS_AUSERVER", kProductionOmahaUrl, NULL,
stateful_override);
else
update_url_ = in_update_url;
// Set the interactive flag accordingly.
interactive_ = in_interactive;
return true;
}
bool OmahaRequestParams::CollectECFWVersions() const {
return (
StartsWithASCII(hwid_, string("SAMS ALEX"), true) ||
StartsWithASCII(hwid_, string("BUTTERFLY"), true) ||
StartsWithASCII(hwid_, string("LUMPY"), true) ||
StartsWithASCII(hwid_, string("PARROT"), true) ||
StartsWithASCII(hwid_, string("SPRING"), true) ||
StartsWithASCII(hwid_, string("SNOW"), true)
);
}
bool OmahaRequestParams::SetTargetChannel(const std::string& new_target_channel,
bool is_powerwash_allowed) {
LOG(INFO) << "SetTargetChannel called with " << new_target_channel
<< ", Is Powerwash Allowed = "
<< utils::ToString(is_powerwash_allowed)
<< ". Current channel = " << current_channel_
<< ", existing target channel = " << target_channel_
<< ", download channel = " << download_channel_;
if (current_channel_ == "canary-channel") {
// TODO(jaysri): chromium-os:39751: We don't have the UI warnings yet. So,
// enable the powerwash-on-changing-to-more-stable-channel behavior for now
// only on canary-channel devices.
is_powerwash_allowed = true;
LOG(INFO) << "Is Powerwash Allowed set to true as we are in canary-channel";
} else if (!utils::IsOfficialBuild() &&
current_channel_ == "testimage-channel") {
// Also, allow test builds to have the powerwash behavior so we can always
// test channel changing behavior on them, without having to first get them
// on an official channel.
is_powerwash_allowed = true;
LOG(INFO) << "Is Powerwash Allowed set to true as we are running an "
"unofficial build";
}
TEST_AND_RETURN_FALSE(IsValidChannel(new_target_channel));
FilePath kFile(root_ + kStatefulPartition + "/etc/lsb-release");
string file_data;
map<string, string> data;
if (file_util::ReadFileToString(kFile, &file_data)) {
data = simple_key_value_store::ParseString(file_data);
}
data[kUpdateChannelKey] = new_target_channel;
data[kIsPowerwashAllowedKey] = is_powerwash_allowed ? "true" : "false";
file_data = simple_key_value_store::AssembleString(data);
TEST_AND_RETURN_FALSE(file_util::CreateDirectory(kFile.DirName()));
TEST_AND_RETURN_FALSE(
file_util::WriteFile(kFile, file_data.data(), file_data.size()) ==
static_cast<int>(file_data.size()));
target_channel_ = new_target_channel;
is_powerwash_allowed_ = is_powerwash_allowed;
return true;
}
void OmahaRequestParams::SetTargetChannelFromLsbValue() {
string target_channel_new_value = GetLsbValue(
kUpdateChannelKey,
current_channel_,
&chromeos_update_engine::OmahaRequestParams::IsValidChannel,
true); // stateful_override
if (target_channel_ != target_channel_new_value) {
target_channel_ = target_channel_new_value;
LOG(INFO) << "Target Channel set to " << target_channel_
<< " from LSB file";
}
}
void OmahaRequestParams::SetCurrentChannelFromLsbValue() {
string current_channel_new_value = GetLsbValue(
kUpdateChannelKey,
current_channel_,
NULL, // No need to validate the read-only rootfs channel.
false); // stateful_override is false so we get the current channel.
if (current_channel_ != current_channel_new_value) {
current_channel_ = current_channel_new_value;
LOG(INFO) << "Current Channel set to " << current_channel_
<< " from LSB file in rootfs";
}
}
void OmahaRequestParams::SetIsPowerwashAllowedFromLsbValue() {
string is_powerwash_allowed_str = GetLsbValue(
kIsPowerwashAllowedKey,
"false",
NULL, // no need to validate
true); // always get it from stateful, as that's the only place it'll be
bool is_powerwash_allowed_new_value = (is_powerwash_allowed_str == "true");
if (is_powerwash_allowed_ != is_powerwash_allowed_new_value) {
is_powerwash_allowed_ = is_powerwash_allowed_new_value;
LOG(INFO) << "Powerwash Allowed set to "
<< utils::ToString(is_powerwash_allowed_)
<< " from LSB file in stateful";
}
}
void OmahaRequestParams::UpdateDownloadChannel() {
if (download_channel_ != target_channel_) {
download_channel_ = target_channel_;
LOG(INFO) << "Download channel for this attempt = " << download_channel_;
}
}
void OmahaRequestParams::InitFromLsbValue() {
SetCurrentChannelFromLsbValue();
SetTargetChannelFromLsbValue();
SetIsPowerwashAllowedFromLsbValue();
UpdateDownloadChannel();
}
string OmahaRequestParams::GetLsbValue(const string& key,
const string& default_value,
ValueValidator validator,
bool stateful_override) const {
vector<string> files;
if (stateful_override) {
files.push_back(string(kStatefulPartition) + "/etc/lsb-release");
}
files.push_back("/etc/lsb-release");
for (vector<string>::const_iterator it = files.begin();
it != files.end(); ++it) {
// TODO(adlr): make sure files checked are owned as root (and all their
// parents are recursively, too).
string file_data;
if (!utils::ReadFile(root_ + *it, &file_data))
continue;
map<string, string> data = simple_key_value_store::ParseString(file_data);
if (utils::MapContainsKey(data, key)) {
const string& value = data[key];
if (validator && !CALL_MEMBER_FN(*this, validator)(value)) {
continue;
}
return value;
}
}
// not found
return default_value;
}
string OmahaRequestParams::GetMachineType() const {
struct utsname buf;
string ret;
if (uname(&buf) == 0)
ret = buf.machine;
return ret;
}
bool OmahaRequestParams::ShouldLockDown() const {
if (force_lock_down_) {
return forced_lock_down_;
}
return utils::IsOfficialBuild() && utils::IsNormalBootMode();
}
bool OmahaRequestParams::IsValidChannel(const std::string& channel) const {
return GetChannelIndex(channel) >= 0;
}
void OmahaRequestParams::set_root(const std::string& root) {
root_ = root;
InitFromLsbValue();
}
void OmahaRequestParams::SetLockDown(bool lock) {
force_lock_down_ = true;
forced_lock_down_ = lock;
}
int OmahaRequestParams::GetChannelIndex(const std::string& channel) const {
for (size_t t = 0; t < arraysize(kChannelsByStability); ++t)
if (channel == kChannelsByStability[t])
return t;
return -1;
}
bool OmahaRequestParams::to_more_stable_channel() const {
int current_channel_index = GetChannelIndex(current_channel_);
int download_channel_index = GetChannelIndex(download_channel_);
return download_channel_index > current_channel_index;
}
string OmahaRequestParams::GetAppId() const {
return download_channel_ == "canary-channel" ? canary_app_id_ : board_app_id_;
}
} // namespace chromeos_update_engine