2239b9e4dd
We perform these steps to perserve the recovery logs when wiping /cache partition. Move them to logging.cpp to keep the actually EraseVolume function concise. Bug: 130166585 Test: unit tests pass, mount cache and check last log after cache Change-Id: Idc52833817a446f3a0148a3dd2112f911c9ef48d
123 lines
No EOL
3.7 KiB
C++
123 lines
No EOL
3.7 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 <stdio.h>
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#include <string.h>
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#include <sys/stat.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 "otautil/dirutil.h"
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#include "otautil/logging.h"
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#include "otautil/roots.h"
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#include "recovery_ui/ui.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, bool convert_fbe) {
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bool is_cache = (strcmp(volume, CACHE_ROOT) == 0);
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bool is_data = (strcmp(volume, DATA_ROOT) == 0);
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ui->SetBackground(RecoveryUI::ERASING);
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ui->SetProgressType(RecoveryUI::INDETERMINATE);
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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;
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if (is_data && convert_fbe) {
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constexpr const char* CONVERT_FBE_DIR = "/tmp/convert_fbe";
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constexpr const char* CONVERT_FBE_FILE = "/tmp/convert_fbe/convert_fbe";
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// Create convert_fbe breadcrumb file to signal init to convert to file based encryption, not
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// full disk encryption.
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if (mkdir(CONVERT_FBE_DIR, 0700) != 0) {
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PLOG(ERROR) << "Failed to mkdir " << CONVERT_FBE_DIR;
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return false;
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}
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FILE* f = fopen(CONVERT_FBE_FILE, "wbe");
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if (!f) {
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PLOG(ERROR) << "Failed to convert to file encryption";
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return false;
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}
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fclose(f);
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result = format_volume(volume, CONVERT_FBE_DIR);
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remove(CONVERT_FBE_FILE);
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rmdir(CONVERT_FBE_DIR);
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} else {
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result = format_volume(volume);
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}
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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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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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bool success = EraseVolume("/cache", ui, false);
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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 convert_fbe) {
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RecoveryUI* ui = device->GetUI();
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ui->Print("\n-- Wiping data...\n");
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bool success = device->PreWipeData();
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if (success) {
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success &= EraseVolume(DATA_ROOT, ui, convert_fbe);
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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, false);
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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, 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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} |