/*
* Copyright (C) 2007 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 "recovery.h"
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <inttypes.h>
#include <limits.h>
#include <linux/fs.h>
#include <linux/input.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <algorithm>
#include <functional>
#include <memory>
#include <string>
#include <vector>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/properties.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <android-base/unique_fd.h>
#include <bootloader_message/bootloader_message.h>
#include <cutils/properties.h> /* for property_list */
#include <healthhalutils/HealthHalUtils.h>
#include <ziparchive/zip_archive.h>
#include "adb_install.h"
#include "common.h"
#include "device.h"
#include "fsck_unshare_blocks.h"
#include "fuse_sdcard_install.h"
#include "fuse_sideload.h"
#include "install.h"
#include "logging.h"
#include "otautil/dirutil.h"
#include "otautil/error_code.h"
#include "otautil/paths.h"
#include "otautil/sysutil.h"
#include "package.h"
#include "roots.h"
#include "screen_ui.h"
#include "ui.h"
static constexpr const char* CACHE_LOG_DIR = "/cache/recovery";
static constexpr const char* COMMAND_FILE = "/cache/recovery/command";
static constexpr const char* LAST_KMSG_FILE = "/cache/recovery/last_kmsg";
static constexpr const char* LAST_LOG_FILE = "/cache/recovery/last_log";
static constexpr const char* LOCALE_FILE = "/cache/recovery/last_locale";
static constexpr const char* CACHE_ROOT = "/cache";
static constexpr const char* DATA_ROOT = "/data";
static constexpr const char* METADATA_ROOT = "/metadata";
static constexpr const char* SDCARD_ROOT = "/sdcard";
// We define RECOVERY_API_VERSION in Android.mk, which will be picked up by build system and packed
// into target_files.zip. Assert the version defined in code and in Android.mk are consistent.
static_assert(kRecoveryApiVersion == RECOVERY_API_VERSION, "Mismatching recovery API versions.");
bool modified_flash = false;
std::string stage;
const char* reason = nullptr;
/*
* The recovery tool communicates with the main system through /cache files.
* /cache/recovery/command - INPUT - command line for tool, one arg per line
* /cache/recovery/log - OUTPUT - combined log file from recovery run(s)
*
* The arguments which may be supplied in the recovery.command file:
* --update_package=path - verify install an OTA package file
* --wipe_data - erase user data (and cache), then reboot
* --prompt_and_wipe_data - prompt the user that data is corrupt, with their consent erase user
* data (and cache), then reboot
* --wipe_cache - wipe cache (but not user data), then reboot
* --show_text - show the recovery text menu, used by some bootloader (e.g. http://b/36872519).
* --set_encrypted_filesystem=on|off - enables / diasables encrypted fs
* --just_exit - do nothing; exit and reboot
*
* After completing, we remove /cache/recovery/command and reboot.
* Arguments may also be supplied in the bootloader control block (BCB).
* These important scenarios must be safely restartable at any point:
*
* FACTORY RESET
* 1. user selects "factory reset"
* 2. main system writes "--wipe_data" to /cache/recovery/command
* 3. main system reboots into recovery
* 4. get_args() writes BCB with "boot-recovery" and "--wipe_data"
* -- after this, rebooting will restart the erase --
* 5. erase_volume() reformats /data
* 6. erase_volume() reformats /cache
* 7. finish_recovery() erases BCB
* -- after this, rebooting will restart the main system --
* 8. main() calls reboot() to boot main system
*
* OTA INSTALL
* 1. main system downloads OTA package to /cache/some-filename.zip
* 2. main system writes "--update_package=/cache/some-filename.zip"
* 3. main system reboots into recovery
* 4. get_args() writes BCB with "boot-recovery" and "--update_package=..."
* -- after this, rebooting will attempt to reinstall the update --
* 5. install_package() attempts to install the update
* NOTE: the package install must itself be restartable from any point
* 6. finish_recovery() erases BCB
* -- after this, rebooting will (try to) restart the main system --
* 7. ** if install failed **
* 7a. prompt_and_wait() shows an error icon and waits for the user
* 7b. the user reboots (pulling the battery, etc) into the main system
*/
bool is_ro_debuggable() {
return android::base::GetBoolProperty("ro.debuggable", false);
}
// Set the BCB to reboot back into recovery (it won't resume the install from
// sdcard though).
static void set_sdcard_update_bootloader_message() {
std::vector<std::string> options;
std::string err;
if (!update_bootloader_message(options, &err)) {
LOG(ERROR) << "Failed to set BCB message: " << err;
}
}
// Clear the recovery command and prepare to boot a (hopefully working) system,
// copy our log file to cache as well (for the system to read). This function is
// idempotent: call it as many times as you like.
static void finish_recovery() {
std::string locale = ui->GetLocale();
// Save the locale to cache, so if recovery is next started up without a '--locale' argument
// (e.g., directly from the bootloader) it will use the last-known locale.
if (!locale.empty() && has_cache) {
LOG(INFO) << "Saving locale \"" << locale << "\"";
if (ensure_path_mounted(LOCALE_FILE) != 0) {
LOG(ERROR) << "Failed to mount " << LOCALE_FILE;
} else if (!android::base::WriteStringToFile(locale, LOCALE_FILE)) {
PLOG(ERROR) << "Failed to save locale to " << LOCALE_FILE;
}
}
copy_logs(modified_flash, has_cache);
// Reset to normal system boot so recovery won't cycle indefinitely.
std::string err;
if (!clear_bootloader_message(&err)) {
LOG(ERROR) << "Failed to clear BCB message: " << err;
}
// Remove the command file, so recovery won't repeat indefinitely.
if (has_cache) {
if (ensure_path_mounted(COMMAND_FILE) != 0 || (unlink(COMMAND_FILE) && errno != ENOENT)) {
LOG(WARNING) << "Can't unlink " << COMMAND_FILE;
}
ensure_path_unmounted(CACHE_ROOT);
}
sync(); // For good measure.
}
struct saved_log_file {
std::string name;
struct stat sb;
std::string data;
};
static bool erase_volume(const char* volume) {
bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
bool is_data = (strcmp(volume, DATA_ROOT) == 0);
ui->SetBackground(RecoveryUI::ERASING);
ui->SetProgressType(RecoveryUI::INDETERMINATE);
std::vector<saved_log_file> log_files;
if (is_cache) {
// If we're reformatting /cache, we load any past logs
// (i.e. "/cache/recovery/last_*") and the current log
// ("/cache/recovery/log") into memory, so we can restore them after
// the reformat.
ensure_path_mounted(volume);
struct dirent* de;
std::unique_ptr<DIR, decltype(&closedir)> d(opendir(CACHE_LOG_DIR), closedir);
if (d) {
while ((de = readdir(d.get())) != nullptr) {
if (strncmp(de->d_name, "last_", 5) == 0 || strcmp(de->d_name, "log") == 0) {
std::string path = android::base::StringPrintf("%s/%s", CACHE_LOG_DIR, de->d_name);
struct stat sb;
if (stat(path.c_str(), &sb) == 0) {
// truncate files to 512kb
if (sb.st_size > (1 << 19)) {
sb.st_size = 1 << 19;
}
std::string data(sb.st_size, '\0');
FILE* f = fopen(path.c_str(), "rbe");
fread(&data[0], 1, data.size(), f);
fclose(f);
log_files.emplace_back(saved_log_file{ path, sb, data });
}
}
}
} else {
if (errno != ENOENT) {
PLOG(ERROR) << "Failed to opendir " << CACHE_LOG_DIR;
}
}
}
ui->Print("Formatting %s...\n", volume);
ensure_path_unmounted(volume);
int result;
if (is_data && reason && strcmp(reason, "convert_fbe") == 0) {
static constexpr const char* CONVERT_FBE_DIR = "/tmp/convert_fbe";
static constexpr const char* CONVERT_FBE_FILE = "/tmp/convert_fbe/convert_fbe";
// Create convert_fbe breadcrumb file to signal init to convert to file based encryption, not
// full disk encryption.
if (mkdir(CONVERT_FBE_DIR, 0700) != 0) {
PLOG(ERROR) << "Failed to mkdir " << CONVERT_FBE_DIR;
return false;
}
FILE* f = fopen(CONVERT_FBE_FILE, "wbe");
if (!f) {
PLOG(ERROR) << "Failed to convert to file encryption";
return false;
}
fclose(f);
result = format_volume(volume, CONVERT_FBE_DIR);
remove(CONVERT_FBE_FILE);
rmdir(CONVERT_FBE_DIR);
} else {
result = format_volume(volume);
}
if (is_cache) {
// Re-create the log dir and write back the log entries.
if (ensure_path_mounted(CACHE_LOG_DIR) == 0 &&
mkdir_recursively(CACHE_LOG_DIR, 0777, false, sehandle) == 0) {
for (const auto& log : log_files) {
if (!android::base::WriteStringToFile(log.data, log.name, log.sb.st_mode, log.sb.st_uid,
log.sb.st_gid)) {
PLOG(ERROR) << "Failed to write to " << log.name;
}
}
} else {
PLOG(ERROR) << "Failed to mount / create " << CACHE_LOG_DIR;
}
// Any part of the log we'd copied to cache is now gone.
// Reset the pointer so we copy from the beginning of the temp
// log.
reset_tmplog_offset();
copy_logs(modified_flash, has_cache);
}
return (result == 0);
}
// Sets the usb config to 'state'
bool SetUsbConfig(const std::string& state) {
android::base::SetProperty("sys.usb.config", state);
return android::base::WaitForProperty("sys.usb.state", state);
}
// Returns the selected filename, or an empty string.
static std::string browse_directory(const std::string& path, Device* device) {
ensure_path_mounted(path);
std::unique_ptr<DIR, decltype(&closedir)> d(opendir(path.c_str()), closedir);
if (!d) {
PLOG(ERROR) << "error opening " << path;
return "";
}
std::vector<std::string> dirs;
std::vector<std::string> entries{ "../" }; // "../" is always the first entry.
dirent* de;
while ((de = readdir(d.get())) != nullptr) {
std::string name(de->d_name);
if (de->d_type == DT_DIR) {
// Skip "." and ".." entries.
if (name == "." || name == "..") continue;
dirs.push_back(name + "/");
} else if (de->d_type == DT_REG && android::base::EndsWithIgnoreCase(name, ".zip")) {
entries.push_back(name);
}
}
std::sort(dirs.begin(), dirs.end());
std::sort(entries.begin(), entries.end());
// Append dirs to the entries list.
entries.insert(entries.end(), dirs.begin(), dirs.end());
std::vector<std::string> headers{ "Choose a package to install:", path };
size_t chosen_item = 0;
while (true) {
chosen_item = ui->ShowMenu(
headers, entries, chosen_item, true,
std::bind(&Device::HandleMenuKey, device, std::placeholders::_1, std::placeholders::_2));
// Return if WaitKey() was interrupted.
if (chosen_item == static_cast<size_t>(RecoveryUI::KeyError::INTERRUPTED)) {
return "";
}
const std::string& item = entries[chosen_item];
if (chosen_item == 0) {
// Go up but continue browsing (if the caller is browse_directory).
return "";
}
std::string new_path = path + "/" + item;
if (new_path.back() == '/') {
// Recurse down into a subdirectory.
new_path.pop_back();
std::string result = browse_directory(new_path, device);
if (!result.empty()) return result;
} else {
// Selected a zip file: return the path to the caller.
return new_path;
}
}
// Unreachable.
}
static bool yes_no(Device* device, const char* question1, const char* question2) {
std::vector<std::string> headers{ question1, question2 };
std::vector<std::string> items{ " No", " Yes" };
size_t chosen_item = ui->ShowMenu(
headers, items, 0, true,
std::bind(&Device::HandleMenuKey, device, std::placeholders::_1, std::placeholders::_2));
return (chosen_item == 1);
}
static bool ask_to_wipe_data(Device* device) {
std::vector<std::string> headers{ "Wipe all user data?", " THIS CAN NOT BE UNDONE!" };
std::vector<std::string> items{ " Cancel", " Factory data reset" };
size_t chosen_item = ui->ShowPromptWipeDataConfirmationMenu(
headers, items,
std::bind(&Device::HandleMenuKey, device, std::placeholders::_1, std::placeholders::_2));
return (chosen_item == 1);
}
// Return true on success.
static bool wipe_data(Device* device) {
modified_flash = true;
ui->Print("\n-- Wiping data...\n");
bool success = device->PreWipeData();
if (success) {
success &= erase_volume(DATA_ROOT);
if (has_cache) {
success &= erase_volume(CACHE_ROOT);
}
if (volume_for_mount_point(METADATA_ROOT) != nullptr) {
success &= erase_volume(METADATA_ROOT);
}
}
if (success) {
success &= device->PostWipeData();
}
ui->Print("Data wipe %s.\n", success ? "complete" : "failed");
return success;
}
static InstallResult prompt_and_wipe_data(Device* device) {
// Use a single string and let ScreenRecoveryUI handles the wrapping.
std::vector<std::string> wipe_data_menu_headers{
"Can't load Android system. Your data may be corrupt. "
"If you continue to get this message, you may need to "
"perform a factory data reset and erase all user data "
"stored on this device.",
};
// clang-format off
std::vector<std::string> wipe_data_menu_items {
"Try again",
"Factory data reset",
};
// clang-format on
for (;;) {
size_t chosen_item = ui->ShowPromptWipeDataMenu(
wipe_data_menu_headers, wipe_data_menu_items,
std::bind(&Device::HandleMenuKey, device, std::placeholders::_1, std::placeholders::_2));
// If ShowMenu() returned RecoveryUI::KeyError::INTERRUPTED, WaitKey() was interrupted.
if (chosen_item == static_cast<size_t>(RecoveryUI::KeyError::INTERRUPTED)) {
return INSTALL_KEY_INTERRUPTED;
}
if (chosen_item != 1) {
return INSTALL_SUCCESS; // Just reboot, no wipe; not a failure, user asked for it
}
if (ask_to_wipe_data(device)) {
if (wipe_data(device)) {
return INSTALL_SUCCESS;
} else {
return INSTALL_ERROR;
}
}
}
}
// Return true on success.
static bool wipe_cache(bool should_confirm, Device* device) {
if (!has_cache) {
ui->Print("No /cache partition found.\n");
return false;
}
if (should_confirm && !yes_no(device, "Wipe cache?", " THIS CAN NOT BE UNDONE!")) {
return false;
}
modified_flash = true;
ui->Print("\n-- Wiping cache...\n");
bool success = erase_volume("/cache");
ui->Print("Cache wipe %s.\n", success ? "complete" : "failed");
return success;
}
// Secure-wipe a given partition. It uses BLKSECDISCARD, if supported. Otherwise, it goes with
// BLKDISCARD (if device supports BLKDISCARDZEROES) or BLKZEROOUT.
static bool secure_wipe_partition(const std::string& partition) {
android::base::unique_fd fd(TEMP_FAILURE_RETRY(open(partition.c_str(), O_WRONLY)));
if (fd == -1) {
PLOG(ERROR) << "Failed to open \"" << partition << "\"";
return false;
}
uint64_t range[2] = { 0, 0 };
if (ioctl(fd, BLKGETSIZE64, &range[1]) == -1 || range[1] == 0) {
PLOG(ERROR) << "Failed to get partition size";
return false;
}
LOG(INFO) << "Secure-wiping \"" << partition << "\" from " << range[0] << " to " << range[1];
LOG(INFO) << " Trying BLKSECDISCARD...";
if (ioctl(fd, BLKSECDISCARD, &range) == -1) {
PLOG(WARNING) << " Failed";
// Use BLKDISCARD if it zeroes out blocks, otherwise use BLKZEROOUT.
unsigned int zeroes;
if (ioctl(fd, BLKDISCARDZEROES, &zeroes) == 0 && zeroes != 0) {
LOG(INFO) << " Trying BLKDISCARD...";
if (ioctl(fd, BLKDISCARD, &range) == -1) {
PLOG(ERROR) << " Failed";
return false;
}
} else {
LOG(INFO) << " Trying BLKZEROOUT...";
if (ioctl(fd, BLKZEROOUT, &range) == -1) {
PLOG(ERROR) << " Failed";
return false;
}
}
}
LOG(INFO) << " Done";
return true;
}
static std::unique_ptr<Package> ReadWipePackage(size_t wipe_package_size) {
if (wipe_package_size == 0) {
LOG(ERROR) << "wipe_package_size is zero";
return nullptr;
}
std::string wipe_package;
std::string err_str;
if (!read_wipe_package(&wipe_package, wipe_package_size, &err_str)) {
PLOG(ERROR) << "Failed to read wipe package" << err_str;
return nullptr;
}
return Package::CreateMemoryPackage(
std::vector<uint8_t>(wipe_package.begin(), wipe_package.end()), nullptr);
}
// Checks if the wipe package matches expectation. If the check passes, reads the list of
// partitions to wipe from the package. Checks include
// 1. verify the package.
// 2. check metadata (ota-type, pre-device and serial number if having one).
static bool CheckWipePackage(Package* wipe_package) {
if (!verify_package(wipe_package)) {
LOG(ERROR) << "Failed to verify package";
return false;
}
ZipArchiveHandle zip = wipe_package->GetZipArchiveHandle();
if (!zip) {
LOG(ERROR) << "Failed to get ZipArchiveHandle";
return false;
}
std::map<std::string, std::string> metadata;
if (!ReadMetadataFromPackage(zip, &metadata)) {
LOG(ERROR) << "Failed to parse metadata in the zip file";
return false;
}
return CheckPackageMetadata(metadata, OtaType::BRICK) == 0;
}
std::vector<std::string> GetWipePartitionList(Package* wipe_package) {
ZipArchiveHandle zip = wipe_package->GetZipArchiveHandle();
if (!zip) {
LOG(ERROR) << "Failed to get ZipArchiveHandle";
return {};
}
static constexpr const char* RECOVERY_WIPE_ENTRY_NAME = "recovery.wipe";
std::string partition_list_content;
ZipString path(RECOVERY_WIPE_ENTRY_NAME);
ZipEntry entry;
if (FindEntry(zip, path, &entry) == 0) {
uint32_t length = entry.uncompressed_length;
partition_list_content = std::string(length, '\0');
if (auto err = ExtractToMemory(
zip, &entry, reinterpret_cast<uint8_t*>(partition_list_content.data()), length);
err != 0) {
LOG(ERROR) << "Failed to extract " << RECOVERY_WIPE_ENTRY_NAME << ": "
<< ErrorCodeString(err);
return {};
}
} else {
LOG(INFO) << "Failed to find " << RECOVERY_WIPE_ENTRY_NAME
<< ", falling back to use the partition list on device.";
static constexpr const char* RECOVERY_WIPE_ON_DEVICE = "/etc/recovery.wipe";
if (!android::base::ReadFileToString(RECOVERY_WIPE_ON_DEVICE, &partition_list_content)) {
PLOG(ERROR) << "failed to read \"" << RECOVERY_WIPE_ON_DEVICE << "\"";
return {};
}
}
std::vector<std::string> result;
std::vector<std::string> lines = android::base::Split(partition_list_content, "\n");
for (const std::string& line : lines) {
std::string partition = android::base::Trim(line);
// Ignore '#' comment or empty lines.
if (android::base::StartsWith(partition, "#") || partition.empty()) {
continue;
}
result.push_back(line);
}
return result;
}
// Wipes the current A/B device, with a secure wipe of all the partitions in RECOVERY_WIPE.
static bool wipe_ab_device(size_t wipe_package_size) {
ui->SetBackground(RecoveryUI::ERASING);
ui->SetProgressType(RecoveryUI::INDETERMINATE);
auto wipe_package = ReadWipePackage(wipe_package_size);
if (!wipe_package) {
LOG(ERROR) << "Failed to open wipe package";
return false;
}
if (!CheckWipePackage(wipe_package.get())) {
LOG(ERROR) << "Failed to verify wipe package";
return false;
}
auto partition_list = GetWipePartitionList(wipe_package.get());
if (partition_list.empty()) {
LOG(ERROR) << "Empty wipe ab partition list";
return false;
}
for (const auto& partition : partition_list) {
// Proceed anyway even if it fails to wipe some partition.
secure_wipe_partition(partition);
}
return true;
}
static void choose_recovery_file(Device* device) {
std::vector<std::string> entries;
if (has_cache) {
for (int i = 0; i < KEEP_LOG_COUNT; i++) {
auto add_to_entries = [&](const char* filename) {
std::string log_file(filename);
if (i > 0) {
log_file += "." + std::to_string(i);
}
if (ensure_path_mounted(log_file) == 0 && access(log_file.c_str(), R_OK) == 0) {
entries.push_back(std::move(log_file));
}
};
// Add LAST_LOG_FILE + LAST_LOG_FILE.x
add_to_entries(LAST_LOG_FILE);
// Add LAST_KMSG_FILE + LAST_KMSG_FILE.x
add_to_entries(LAST_KMSG_FILE);
}
} else {
// If cache partition is not found, view /tmp/recovery.log instead.
if (access(Paths::Get().temporary_log_file().c_str(), R_OK) == -1) {
return;
} else {
entries.push_back(Paths::Get().temporary_log_file());
}
}
entries.push_back("Back");
std::vector<std::string> headers{ "Select file to view" };
size_t chosen_item = 0;
while (true) {
chosen_item = ui->ShowMenu(
headers, entries, chosen_item, true,
std::bind(&Device::HandleMenuKey, device, std::placeholders::_1, std::placeholders::_2));
// Handle WaitKey() interrupt.
if (chosen_item == static_cast<size_t>(RecoveryUI::KeyError::INTERRUPTED)) {
break;
}
if (entries[chosen_item] == "Back") break;
ui->ShowFile(entries[chosen_item]);
}
}
static void run_graphics_test() {
// Switch to graphics screen.
ui->ShowText(false);
ui->SetProgressType(RecoveryUI::INDETERMINATE);
ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
sleep(1);
ui->SetBackground(RecoveryUI::ERROR);
sleep(1);
ui->SetBackground(RecoveryUI::NO_COMMAND);
sleep(1);
ui->SetBackground(RecoveryUI::ERASING);
sleep(1);
// Calling SetBackground() after SetStage() to trigger a redraw.
ui->SetStage(1, 3);
ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
sleep(1);
ui->SetStage(2, 3);
ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
sleep(1);
ui->SetStage(3, 3);
ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
sleep(1);
ui->SetStage(-1, -1);
ui->SetBackground(RecoveryUI::INSTALLING_UPDATE);
ui->SetProgressType(RecoveryUI::DETERMINATE);
ui->ShowProgress(1.0, 10.0);
float fraction = 0.0;
for (size_t i = 0; i < 100; ++i) {
fraction += .01;
ui->SetProgress(fraction);
usleep(100000);
}
ui->ShowText(true);
}
// TODO(xunchang) move apply_from_sdcard() to fuse_sdcard_install.cpp
// How long (in seconds) we wait for the fuse-provided package file to
// appear, before timing out.
#define SDCARD_INSTALL_TIMEOUT 10
static int apply_from_sdcard(Device* device, bool* wipe_cache) {
modified_flash = true;
if (ensure_path_mounted(SDCARD_ROOT) != 0) {
ui->Print("\n-- Couldn't mount %s.\n", SDCARD_ROOT);
return INSTALL_ERROR;
}
std::string path = browse_directory(SDCARD_ROOT, device);
if (path.empty()) {
ui->Print("\n-- No package file selected.\n");
ensure_path_unmounted(SDCARD_ROOT);
return INSTALL_ERROR;
}
ui->Print("\n-- Install %s ...\n", path.c_str());
set_sdcard_update_bootloader_message();
// We used to use fuse in a thread as opposed to a process. Since accessing
// through fuse involves going from kernel to userspace to kernel, it leads
// to deadlock when a page fault occurs. (Bug: 26313124)
pid_t child;
if ((child = fork()) == 0) {
bool status = start_sdcard_fuse(path.c_str());
_exit(status ? EXIT_SUCCESS : EXIT_FAILURE);
}
// FUSE_SIDELOAD_HOST_PATHNAME will start to exist once the fuse in child
// process is ready.
int result = INSTALL_ERROR;
int status;
bool waited = false;
for (int i = 0; i < SDCARD_INSTALL_TIMEOUT; ++i) {
if (waitpid(child, &status, WNOHANG) == -1) {
result = INSTALL_ERROR;
waited = true;
break;
}
struct stat sb;
if (stat(FUSE_SIDELOAD_HOST_PATHNAME, &sb) == -1) {
if (errno == ENOENT && i < SDCARD_INSTALL_TIMEOUT-1) {
sleep(1);
continue;
} else {
LOG(ERROR) << "Timed out waiting for the fuse-provided package.";
result = INSTALL_ERROR;
kill(child, SIGKILL);
break;
}
}
result = install_package(FUSE_SIDELOAD_HOST_PATHNAME, wipe_cache, false, 0 /*retry_count*/);
break;
}
if (!waited) {
// Calling stat() on this magic filename signals the fuse
// filesystem to shut down.
struct stat sb;
stat(FUSE_SIDELOAD_HOST_EXIT_PATHNAME, &sb);
waitpid(child, &status, 0);
}
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
LOG(ERROR) << "Error exit from the fuse process: " << WEXITSTATUS(status);
}
ensure_path_unmounted(SDCARD_ROOT);
return result;
}
// Returns REBOOT, SHUTDOWN, or REBOOT_BOOTLOADER. Returning NO_ACTION means to take the default,
// which is to reboot or shutdown depending on if the --shutdown_after flag was passed to recovery.
static Device::BuiltinAction prompt_and_wait(Device* device, int status) {
for (;;) {
finish_recovery();
switch (status) {
case INSTALL_SUCCESS:
case INSTALL_NONE:
ui->SetBackground(RecoveryUI::NO_COMMAND);
break;
case INSTALL_ERROR:
case INSTALL_CORRUPT:
ui->SetBackground(RecoveryUI::ERROR);
break;
}
ui->SetProgressType(RecoveryUI::EMPTY);
size_t chosen_item = ui->ShowMenu(
{}, device->GetMenuItems(), 0, false,
std::bind(&Device::HandleMenuKey, device, std::placeholders::_1, std::placeholders::_2));
// Handle Interrupt key
if (chosen_item == static_cast<size_t>(RecoveryUI::KeyError::INTERRUPTED)) {
return Device::KEY_INTERRUPTED;
}
// Device-specific code may take some action here. It may return one of the core actions
// handled in the switch statement below.
Device::BuiltinAction chosen_action =
(chosen_item == static_cast<size_t>(RecoveryUI::KeyError::TIMED_OUT))
? Device::REBOOT
: device->InvokeMenuItem(chosen_item);
bool should_wipe_cache = false;
switch (chosen_action) {
case Device::NO_ACTION:
break;
case Device::REBOOT:
case Device::SHUTDOWN:
case Device::REBOOT_BOOTLOADER:
case Device::ENTER_FASTBOOT:
case Device::ENTER_RECOVERY:
return chosen_action;
case Device::WIPE_DATA:
if (ui->IsTextVisible()) {
if (ask_to_wipe_data(device)) {
wipe_data(device);
}
} else {
wipe_data(device);
return Device::NO_ACTION;
}
break;
case Device::WIPE_CACHE:
wipe_cache(ui->IsTextVisible(), device);
if (!ui->IsTextVisible()) return Device::NO_ACTION;
break;
case Device::APPLY_ADB_SIDELOAD:
case Device::APPLY_SDCARD:
{
bool adb = (chosen_action == Device::APPLY_ADB_SIDELOAD);
if (adb) {
status = apply_from_adb(&should_wipe_cache);
} else {
status = apply_from_sdcard(device, &should_wipe_cache);
}
if (status == INSTALL_SUCCESS && should_wipe_cache) {
if (!wipe_cache(false, device)) {
status = INSTALL_ERROR;
}
}
if (status != INSTALL_SUCCESS) {
ui->SetBackground(RecoveryUI::ERROR);
ui->Print("Installation aborted.\n");
copy_logs(modified_flash, has_cache);
} else if (!ui->IsTextVisible()) {
return Device::NO_ACTION; // reboot if logs aren't visible
} else {
ui->Print("\nInstall from %s complete.\n", adb ? "ADB" : "SD card");
}
}
break;
case Device::VIEW_RECOVERY_LOGS:
choose_recovery_file(device);
break;
case Device::RUN_GRAPHICS_TEST:
run_graphics_test();
break;
case Device::RUN_LOCALE_TEST: {
ScreenRecoveryUI* screen_ui = static_cast<ScreenRecoveryUI*>(ui);
screen_ui->CheckBackgroundTextImages();
break;
}
case Device::MOUNT_SYSTEM:
// the system partition is mounted at /mnt/system
if (ensure_path_mounted_at(get_system_root(), "/mnt/system") != -1) {
ui->Print("Mounted /system.\n");
}
break;
case Device::KEY_INTERRUPTED:
return Device::KEY_INTERRUPTED;
}
}
}
static void print_property(const char* key, const char* name, void* /* cookie */) {
printf("%s=%s\n", key, name);
}
void ui_print(const char* format, ...) {
std::string buffer;
va_list ap;
va_start(ap, format);
android::base::StringAppendV(&buffer, format, ap);
va_end(ap);
if (ui != nullptr) {
ui->Print("%s", buffer.c_str());
} else {
fputs(buffer.c_str(), stdout);
}
}
static bool is_battery_ok(int* required_battery_level) {
using android::hardware::health::V1_0::BatteryStatus;
using android::hardware::health::V2_0::get_health_service;
using android::hardware::health::V2_0::IHealth;
using android::hardware::health::V2_0::Result;
using android::hardware::health::V2_0::toString;
android::sp<IHealth> health = get_health_service();
static constexpr int BATTERY_READ_TIMEOUT_IN_SEC = 10;
int wait_second = 0;
while (true) {
auto charge_status = BatteryStatus::UNKNOWN;
if (health == nullptr) {
LOG(WARNING) << "no health implementation is found, assuming defaults";
} else {
health
->getChargeStatus([&charge_status](auto res, auto out_status) {
if (res == Result::SUCCESS) {
charge_status = out_status;
}
})
.isOk(); // should not have transport error
}
// Treat unknown status as charged.
bool charged = (charge_status != BatteryStatus::DISCHARGING &&
charge_status != BatteryStatus::NOT_CHARGING);
Result res = Result::UNKNOWN;
int32_t capacity = INT32_MIN;
if (health != nullptr) {
health
->getCapacity([&res, &capacity](auto out_res, auto out_capacity) {
res = out_res;
capacity = out_capacity;
})
.isOk(); // should not have transport error
}
LOG(INFO) << "charge_status " << toString(charge_status) << ", charged " << charged
<< ", status " << toString(res) << ", capacity " << capacity;
// At startup, the battery drivers in devices like N5X/N6P take some time to load
// the battery profile. Before the load finishes, it reports value 50 as a fake
// capacity. BATTERY_READ_TIMEOUT_IN_SEC is set that the battery drivers are expected
// to finish loading the battery profile earlier than 10 seconds after kernel startup.
if (res == Result::SUCCESS && capacity == 50) {
if (wait_second < BATTERY_READ_TIMEOUT_IN_SEC) {
sleep(1);
wait_second++;
continue;
}
}
// If we can't read battery percentage, it may be a device without battery. In this
// situation, use 100 as a fake battery percentage.
if (res != Result::SUCCESS) {
capacity = 100;
}
// GmsCore enters recovery mode to install package when having enough battery percentage.
// Normally, the threshold is 40% without charger and 20% with charger. So we should check
// battery with a slightly lower limitation.
static constexpr int BATTERY_OK_PERCENTAGE = 20;
static constexpr int BATTERY_WITH_CHARGER_OK_PERCENTAGE = 15;
*required_battery_level = charged ? BATTERY_WITH_CHARGER_OK_PERCENTAGE : BATTERY_OK_PERCENTAGE;
return capacity >= *required_battery_level;
}
}
// Set the retry count to |retry_count| in BCB.
static void set_retry_bootloader_message(int retry_count, const std::vector<std::string>& args) {
std::vector<std::string> options;
for (const auto& arg : args) {
if (!android::base::StartsWith(arg, "--retry_count")) {
options.push_back(arg);
}
}
// Update the retry counter in BCB.
options.push_back(android::base::StringPrintf("--retry_count=%d", retry_count));
std::string err;
if (!update_bootloader_message(options, &err)) {
LOG(ERROR) << err;
}
}
static bool bootreason_in_blacklist() {
std::string bootreason = android::base::GetProperty("ro.boot.bootreason", "");
if (!bootreason.empty()) {
// More bootreasons can be found in "system/core/bootstat/bootstat.cpp".
static const std::vector<std::string> kBootreasonBlacklist{
"kernel_panic",
"Panic",
};
for (const auto& str : kBootreasonBlacklist) {
if (android::base::EqualsIgnoreCase(str, bootreason)) return true;
}
}
return false;
}
static void log_failure_code(ErrorCode code, const std::string& update_package) {
std::vector<std::string> log_buffer = {
update_package,
"0", // install result
"error: " + std::to_string(code),
};
std::string log_content = android::base::Join(log_buffer, "\n");
const std::string& install_file = Paths::Get().temporary_install_file();
if (!android::base::WriteStringToFile(log_content, install_file)) {
PLOG(ERROR) << "Failed to write " << install_file;
}
// Also write the info into last_log.
LOG(INFO) << log_content;
}
Device::BuiltinAction start_recovery(Device* device, const std::vector<std::string>& args) {
static constexpr struct option OPTIONS[] = {
{ "fastboot", no_argument, nullptr, 0 },
{ "fsck_unshare_blocks", no_argument, nullptr, 0 },
{ "just_exit", no_argument, nullptr, 'x' },
{ "locale", required_argument, nullptr, 0 },
{ "prompt_and_wipe_data", no_argument, nullptr, 0 },
{ "reason", required_argument, nullptr, 0 },
{ "retry_count", required_argument, nullptr, 0 },
{ "security", no_argument, nullptr, 0 },
{ "show_text", no_argument, nullptr, 't' },
{ "shutdown_after", no_argument, nullptr, 0 },
{ "sideload", no_argument, nullptr, 0 },
{ "sideload_auto_reboot", no_argument, nullptr, 0 },
{ "update_package", required_argument, nullptr, 0 },
{ "wipe_ab", no_argument, nullptr, 0 },
{ "wipe_cache", no_argument, nullptr, 0 },
{ "wipe_data", no_argument, nullptr, 0 },
{ "wipe_package_size", required_argument, nullptr, 0 },
{ nullptr, 0, nullptr, 0 },
};
const char* update_package = nullptr;
bool should_wipe_data = false;
bool should_prompt_and_wipe_data = false;
bool should_wipe_cache = false;
bool should_wipe_ab = false;
size_t wipe_package_size = 0;
bool sideload = false;
bool sideload_auto_reboot = false;
bool just_exit = false;
bool shutdown_after = false;
bool fsck_unshare_blocks = false;
int retry_count = 0;
bool security_update = false;
std::string locale;
auto args_to_parse = StringVectorToNullTerminatedArray(args);
int arg;
int option_index;
// Parse everything before the last element (which must be a nullptr). getopt_long(3) expects a
// null-terminated char* array, but without counting null as an arg (i.e. argv[argc] should be
// nullptr).
while ((arg = getopt_long(args_to_parse.size() - 1, args_to_parse.data(), "", OPTIONS,
&option_index)) != -1) {
switch (arg) {
case 't':
// Handled in recovery_main.cpp
break;
case 'x':
just_exit = true;
break;
case 0: {
std::string option = OPTIONS[option_index].name;
if (option == "fsck_unshare_blocks") {
fsck_unshare_blocks = true;
} else if (option == "locale" || option == "fastboot") {
// Handled in recovery_main.cpp
} else if (option == "prompt_and_wipe_data") {
should_prompt_and_wipe_data = true;
} else if (option == "reason") {
reason = optarg;
} else if (option == "retry_count") {
android::base::ParseInt(optarg, &retry_count, 0);
} else if (option == "security") {
security_update = true;
} else if (option == "sideload") {
sideload = true;
} else if (option == "sideload_auto_reboot") {
sideload = true;
sideload_auto_reboot = true;
} else if (option == "shutdown_after") {
shutdown_after = true;
} else if (option == "update_package") {
update_package = optarg;
} else if (option == "wipe_ab") {
should_wipe_ab = true;
} else if (option == "wipe_cache") {
should_wipe_cache = true;
} else if (option == "wipe_data") {
should_wipe_data = true;
} else if (option == "wipe_package_size") {
android::base::ParseUint(optarg, &wipe_package_size);
}
break;
}
case '?':
LOG(ERROR) << "Invalid command argument";
continue;
}
}
optind = 1;
printf("stage is [%s]\n", stage.c_str());
printf("reason is [%s]\n", reason);
// Set background string to "installing security update" for security update,
// otherwise set it to "installing system update".
ui->SetSystemUpdateText(security_update);
int st_cur, st_max;
if (!stage.empty() && sscanf(stage.c_str(), "%d/%d", &st_cur, &st_max) == 2) {
ui->SetStage(st_cur, st_max);
}
std::vector<std::string> title_lines =
android::base::Split(android::base::GetProperty("ro.bootimage.build.fingerprint", ""), ":");
title_lines.insert(std::begin(title_lines), "Android Recovery");
ui->SetTitle(title_lines);
ui->ResetKeyInterruptStatus();
device->StartRecovery();
printf("Command:");
for (const auto& arg : args) {
printf(" \"%s\"", arg.c_str());
}
printf("\n\n");
property_list(print_property, nullptr);
printf("\n");
ui->Print("Supported API: %d\n", kRecoveryApiVersion);
int status = INSTALL_SUCCESS;
if (update_package != nullptr) {
// It's not entirely true that we will modify the flash. But we want
// to log the update attempt since update_package is non-NULL.
modified_flash = true;
int required_battery_level;
if (retry_count == 0 && !is_battery_ok(&required_battery_level)) {
ui->Print("battery capacity is not enough for installing package: %d%% needed\n",
required_battery_level);
// Log the error code to last_install when installation skips due to
// low battery.
log_failure_code(kLowBattery, update_package);
status = INSTALL_SKIPPED;
} else if (retry_count == 0 && bootreason_in_blacklist()) {
// Skip update-on-reboot when bootreason is kernel_panic or similar
ui->Print("bootreason is in the blacklist; skip OTA installation\n");
log_failure_code(kBootreasonInBlacklist, update_package);
status = INSTALL_SKIPPED;
} else {
// It's a fresh update. Initialize the retry_count in the BCB to 1; therefore we can later
// identify the interrupted update due to unexpected reboots.
if (retry_count == 0) {
set_retry_bootloader_message(retry_count + 1, args);
}
status = install_package(update_package, &should_wipe_cache, true, retry_count);
if (status == INSTALL_SUCCESS && should_wipe_cache) {
wipe_cache(false, device);
}
if (status != INSTALL_SUCCESS) {
ui->Print("Installation aborted.\n");
// When I/O error or bspatch/imgpatch error happens, reboot and retry installation
// RETRY_LIMIT times before we abandon this OTA update.
static constexpr int RETRY_LIMIT = 4;
if (status == INSTALL_RETRY && retry_count < RETRY_LIMIT) {
copy_logs(modified_flash, has_cache);
retry_count += 1;
set_retry_bootloader_message(retry_count, args);
// Print retry count on screen.
ui->Print("Retry attempt %d\n", retry_count);
// Reboot and retry the update
if (!reboot("reboot,recovery")) {
ui->Print("Reboot failed\n");
} else {
while (true) {
pause();
}
}
}
// If this is an eng or userdebug build, then automatically
// turn the text display on if the script fails so the error
// message is visible.
if (is_ro_debuggable()) {
ui->ShowText(true);
}
}
}
} else if (should_wipe_data) {
if (!wipe_data(device)) {
status = INSTALL_ERROR;
}
} else if (should_prompt_and_wipe_data) {
// Trigger the logging to capture the cause, even if user chooses to not wipe data.
modified_flash = true;
ui->ShowText(true);
ui->SetBackground(RecoveryUI::ERROR);
status = prompt_and_wipe_data(device);
if (status != INSTALL_KEY_INTERRUPTED) {
ui->ShowText(false);
}
} else if (should_wipe_cache) {
if (!wipe_cache(false, device)) {
status = INSTALL_ERROR;
}
} else if (should_wipe_ab) {
if (!wipe_ab_device(wipe_package_size)) {
status = INSTALL_ERROR;
}
} else if (sideload) {
// 'adb reboot sideload' acts the same as user presses key combinations
// to enter the sideload mode. When 'sideload-auto-reboot' is used, text
// display will NOT be turned on by default. And it will reboot after
// sideload finishes even if there are errors. Unless one turns on the
// text display during the installation. This is to enable automated
// testing.
if (!sideload_auto_reboot) {
ui->ShowText(true);
}
status = apply_from_adb(&should_wipe_cache);
if (status == INSTALL_SUCCESS && should_wipe_cache) {
if (!wipe_cache(false, device)) {
status = INSTALL_ERROR;
}
}
ui->Print("\nInstall from ADB complete (status: %d).\n", status);
if (sideload_auto_reboot) {
ui->Print("Rebooting automatically.\n");
}
} else if (fsck_unshare_blocks) {
if (!do_fsck_unshare_blocks()) {
status = INSTALL_ERROR;
}
} else if (!just_exit) {
// If this is an eng or userdebug build, automatically turn on the text display if no command
// is specified. Note that this should be called before setting the background to avoid
// flickering the background image.
if (is_ro_debuggable()) {
ui->ShowText(true);
}
status = INSTALL_NONE; // No command specified
ui->SetBackground(RecoveryUI::NO_COMMAND);
}
if (status == INSTALL_ERROR || status == INSTALL_CORRUPT) {
ui->SetBackground(RecoveryUI::ERROR);
if (!ui->IsTextVisible()) {
sleep(5);
}
}
Device::BuiltinAction after = shutdown_after ? Device::SHUTDOWN : Device::REBOOT;
// 1. If the recovery menu is visible, prompt and wait for commands.
// 2. If the state is INSTALL_NONE, wait for commands. (i.e. In user build, manually reboot into
// recovery to sideload a package.)
// 3. sideload_auto_reboot is an option only available in user-debug build, reboot the device
// without waiting.
// 4. In all other cases, reboot the device. Therefore, normal users will observe the device
// reboot after it shows the "error" screen for 5s.
if ((status == INSTALL_NONE && !sideload_auto_reboot) || ui->IsTextVisible()) {
Device::BuiltinAction temp = prompt_and_wait(device, status);
if (temp != Device::NO_ACTION) {
after = temp;
}
}
// Save logs and clean up before rebooting or shutting down.
finish_recovery();
return after;
}
