blob: 3407ab8ea8c61eb6ebfebd781496ead82aa35d23 [file] [log] [blame]
// Copyright 2020 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 <string>
#include <vector>
#include <base/files/file_path.h>
#include <base/files/file_util.h>
#include <brillo/process/process.h>
#include <vboot/crossystem.h>
#include "installer/inst_util.h"
#include "installer/slow_boot_notify.h"
using std::string;
using std::vector;
void ExtractFspm(const string& partition, const base::FilePath& fspm_path) {
if (partition != "A" && partition != "B") {
printf("%s - unsupported partition %s\n", __func__, partition.c_str());
base::FilePath fw_bin_path;
if (!CreateTemporaryFile(&fw_bin_path))
vector<string> cmd = {"/usr/sbin/flashrom",
"FW_MAIN_" + partition + ":" + fw_bin_path.value()};
int result;
if ((result = RunCommand(cmd))) {
printf("%s: Error reading FW_MAIN_%s %d\n", __func__, partition.c_str(),
cmd = {"/usr/bin/cbfstool", fw_bin_path.value(),
"extract", "-n",
"fspm.bin", "-f",
if ((result = RunCommand(cmd)))
printf("%s: Error extracting FSPM from FW_MAIN_%s - %d\n", __func__,
partition.c_str(), result);
void SlowBootNotifyPreFwUpdate(const base::FilePath& fspm_main) {
char partition[VB_MAX_STRING_PROPERTY];
if (!VbGetSystemPropertyString("mainfw_act", partition, sizeof(partition)))
ExtractFspm(partition, fspm_main);
void SlowBootNotifyPostFwUpdate(const base::FilePath& fspm_next) {
// After firmware update, get the ID of the new partition/region. If there is
// no firmware update, region returned by fw_try_next is the same as
// mainfw_act.
const char* partition = VbGetSystemPropertyString("fw_try_next", NULL, 0);
ExtractFspm(partition, fspm_next);
bool SlowBootNotifyRequired(const base::FilePath& fspm_main,
const base::FilePath& fspm_next) {
// Enable slow boot notification only if FSPMs are different. Reduce
// notification noise if one/both of the FSPMs don't exist (due to unforeseen
// errors).
if (base::PathExists(fspm_main) && base::PathExists(fspm_next) &&
!ContentsEqual(fspm_main, fspm_next)) {
printf("%s: Slow boot notification enabled\n", __func__);
return true;
printf("%s: Slow boot notification disabled\n", __func__);
return false;