/*
* Copyright ( C ) 2019 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 "install/wipe_data.h"
#include <string.h>
#include <functional>
#include <vector>
#include <android-base/file.h>
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include "bootloader_message/bootloader_message.h"
#include "install/snapshot_utils.h"
#include "recovery_ui/ui.h"
#include "recovery_utils/logging.h"
#include "recovery_utils/roots.h"
constexpr const char * CACHE_ROOT = "/cache" ;
constexpr const char * DATA_ROOT = "/data" ;
constexpr const char * METADATA_ROOT = "/metadata" ;
static bool EraseVolume(const char * volume, RecoveryUI* ui, std::string_view new_fstype) {
LOG(INFO) << "Erasing volume " << volume << " with new filesystem type " << new_fstype;
bool is_cache = (strcmp(volume, CACHE_ROOT) == 0 );
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.
log_files = ReadLogFilesToMemory();
}
ui->Print("Formatting %s...\n" , volume);
ensure_path_unmounted(volume);
int result = format_volume(volume, "" , new_fstype);
if (is_cache) {
RestoreLogFilesAfterFormat(log_files);
}
return (result == 0 );
}
bool WipeCache(RecoveryUI* ui, const std::function<bool ()>& confirm_func,
std::string_view new_fstype) {
bool has_cache = volume_for_mount_point("/cache" ) != nullptr;
if (!has_cache) {
ui->Print("No /cache partition found.\n" );
return false ;
}
if (confirm_func && !confirm_func()) {
return false ;
}
ui->Print("\n-- Wiping cache...\n" );
ui->SetBackground(RecoveryUI::ERASING);
ui->SetProgressType(RecoveryUI::INDETERMINATE);
bool success = EraseVolume("/cache" , ui, new_fstype);
ui->Print("Cache wipe %s.\n" , success ? "complete" : "failed" );
return success;
}
bool WipeData(Device* device, bool keep_memtag_mode, std::string_view data_fstype) {
RecoveryUI* ui = device->GetUI();
ui->Print("\n-- Wiping data %.*s...\n" , static_cast <int >(data_fstype.size()), data_fstype.data());
ui->SetBackground(RecoveryUI::ERASING);
ui->SetProgressType(RecoveryUI::INDETERMINATE);
if (!FinishPendingSnapshotMerges(device)) {
ui->Print("Unable to check update status or complete merge, cannot wipe partitions.\n" );
return false ;
}
bool success = device->PreWipeData();
if (success) {
success &= EraseVolume(DATA_ROOT, ui, data_fstype);
bool has_cache = volume_for_mount_point("/cache" ) != nullptr;
if (has_cache) {
success &= EraseVolume(CACHE_ROOT, ui, data_fstype);
}
if (volume_for_mount_point(METADATA_ROOT) != nullptr) {
success &= EraseVolume(METADATA_ROOT, ui, data_fstype);
}
}
if (keep_memtag_mode) {
ui->Print("NOT resetting memtag message as per request...\n" );
} else {
ui->Print("Resetting memtag message...\n" );
std::string err;
if (!WriteMiscMemtagMessage({}, &err)) {
ui->Print("Failed to reset memtag message: %s\n" , err.c_str());
success = false ;
}
}
if (success) {
success &= device->PostWipeData();
}
ui->Print("Data wipe %s.\n" , success ? "complete" : "failed" );
return success;
}
Messung V0.5 in Prozent C=92 H=94 G=92
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-07-01)
¤
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