735499480d
For 16K dev options, we might need to reformat /data partition as ext4 before enabling the feature. Add necessary support to recovery. Test: Trigger reboot with --wipe_data --reformat_data=ext4, make sure /data is reformatted with ext4 on next boot Bug: 293313353 Change-Id: I3cb67a62635a2df578472cd48cf6d2f5e04b5f82
120 lines
3.8 KiB
C++
120 lines
3.8 KiB
C++
/*
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* Copyright (C) 2019 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 "install/wipe_data.h"
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#include <string.h>
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#include <functional>
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#include <vector>
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#include <android-base/file.h>
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#include <android-base/logging.h>
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#include <android-base/stringprintf.h>
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#include "bootloader_message/bootloader_message.h"
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#include "install/snapshot_utils.h"
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#include "recovery_ui/ui.h"
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#include "recovery_utils/logging.h"
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#include "recovery_utils/roots.h"
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constexpr const char* CACHE_ROOT = "/cache";
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constexpr const char* DATA_ROOT = "/data";
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constexpr const char* METADATA_ROOT = "/metadata";
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static bool EraseVolume(const char* volume, RecoveryUI* ui, std::string_view new_fstype) {
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LOG(INFO) << "Erasing volume " << volume << " with new filesystem type " << new_fstype;
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bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
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std::vector<saved_log_file> log_files;
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if (is_cache) {
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// If we're reformatting /cache, we load any past logs (i.e. "/cache/recovery/last_*") and the
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// current log ("/cache/recovery/log") into memory, so we can restore them after the reformat.
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log_files = ReadLogFilesToMemory();
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}
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ui->Print("Formatting %s...\n", volume);
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ensure_path_unmounted(volume);
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int result = format_volume(volume, "", new_fstype);
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if (is_cache) {
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RestoreLogFilesAfterFormat(log_files);
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}
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return (result == 0);
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}
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bool WipeCache(RecoveryUI* ui, const std::function<bool()>& confirm_func,
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std::string_view new_fstype) {
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bool has_cache = volume_for_mount_point("/cache") != nullptr;
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if (!has_cache) {
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ui->Print("No /cache partition found.\n");
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return false;
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}
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if (confirm_func && !confirm_func()) {
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return false;
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}
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ui->Print("\n-- Wiping cache...\n");
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ui->SetBackground(RecoveryUI::ERASING);
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ui->SetProgressType(RecoveryUI::INDETERMINATE);
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bool success = EraseVolume("/cache", ui, new_fstype);
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ui->Print("Cache wipe %s.\n", success ? "complete" : "failed");
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return success;
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}
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bool WipeData(Device* device, bool keep_memtag_mode, std::string_view data_fstype) {
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RecoveryUI* ui = device->GetUI();
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ui->Print("\n-- Wiping data %.*s...\n", static_cast<int>(data_fstype.size()), data_fstype.data());
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ui->SetBackground(RecoveryUI::ERASING);
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ui->SetProgressType(RecoveryUI::INDETERMINATE);
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if (!FinishPendingSnapshotMerges(device)) {
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ui->Print("Unable to check update status or complete merge, cannot wipe partitions.\n");
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return false;
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}
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bool success = device->PreWipeData();
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if (success) {
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success &= EraseVolume(DATA_ROOT, ui, data_fstype);
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bool has_cache = volume_for_mount_point("/cache") != nullptr;
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if (has_cache) {
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success &= EraseVolume(CACHE_ROOT, ui, data_fstype);
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}
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if (volume_for_mount_point(METADATA_ROOT) != nullptr) {
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success &= EraseVolume(METADATA_ROOT, ui, data_fstype);
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}
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}
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if (keep_memtag_mode) {
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ui->Print("NOT resetting memtag message as per request...\n");
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} else {
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ui->Print("Resetting memtag message...\n");
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std::string err;
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if (!WriteMiscMemtagMessage({}, &err)) {
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ui->Print("Failed to reset memtag message: %s\n", err.c_str());
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success = false;
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}
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}
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if (success) {
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success &= device->PostWipeData();
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}
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ui->Print("Data wipe %s.\n", success ? "complete" : "failed");
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return success;
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}
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