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platform_system_vold/VoldNativeService.cpp
Yurii Zubrytskyi 1d7acfddf7 Enable dynamic read logs buffer sizing for incfs 
Default buffer size of 4 pages causes many missed log records
because of ring buffer overflows. This change adds a dynamic
sizing, up to 32 pages, that has shown to decrease dropped
records pretty much to nil

Fallback code automatically decreases the buffer size in case
of kernel memory fragmentation - some logs are still much
better than no logs at all

Bug: 203551890
Test: manual, adb install <Apk>; checked for fallback by
  increasing max size to 1024 pages
Change-Id: I0ea46c1ad2534b1dbb5faaead52afab88b66747b
2021-10-28 14:41:48 -07:00

1086 lines
34 KiB
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/*
* Copyright (C) 2017 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.
*/
#define ATRACE_TAG ATRACE_TAG_PACKAGE_MANAGER
#include "VoldNativeService.h"
#include <android-base/logging.h>
#include <android-base/stringprintf.h>
#include <android-base/strings.h>
#include <fs_mgr.h>
#include <fscrypt/fscrypt.h>
#include <private/android_filesystem_config.h>
#include <utils/Trace.h>
#include <stdio.h>
#include <sys/vfs.h>
#include <fstream>
#include <thread>
#include "Benchmark.h"
#include "Checkpoint.h"
#include "FsCrypt.h"
#include "IdleMaint.h"
#include "KeyStorage.h"
#include "Keystore.h"
#include "MetadataCrypt.h"
#include "MoveStorage.h"
#include "Process.h"
#include "VoldNativeServiceValidation.h"
#include "VoldUtil.h"
#include "VolumeManager.h"
#include "cryptfs.h"
#include "incfs.h"
using android::base::StringPrintf;
using std::endl;
using namespace std::literals;
namespace android {
namespace vold {
namespace {
constexpr const char* kDump = "android.permission.DUMP";
constexpr auto kIncFsReadNoTimeoutMs = 100;
static binder::Status error(const std::string& msg) {
PLOG(ERROR) << msg;
return binder::Status::fromServiceSpecificError(errno, String8(msg.c_str()));
}
static binder::Status translate(int status) {
if (status == 0) {
return binder::Status::ok();
} else {
return binder::Status::fromServiceSpecificError(status);
}
}
static binder::Status translateBool(bool status) {
if (status) {
return binder::Status::ok();
} else {
return binder::Status::fromServiceSpecificError(status);
}
}
#define ENFORCE_SYSTEM_OR_ROOT \
{ \
binder::Status status = CheckUidOrRoot(AID_SYSTEM); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_ID(id) \
{ \
binder::Status status = CheckArgumentId((id)); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_PATH(path) \
{ \
binder::Status status = CheckArgumentPath((path)); \
if (!status.isOk()) { \
return status; \
} \
}
#define CHECK_ARGUMENT_HEX(hex) \
{ \
binder::Status status = CheckArgumentHex((hex)); \
if (!status.isOk()) { \
return status; \
} \
}
#define ACQUIRE_LOCK \
std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getLock()); \
ATRACE_CALL();
#define ACQUIRE_CRYPT_LOCK \
std::lock_guard<std::mutex> lock(VolumeManager::Instance()->getCryptLock()); \
ATRACE_CALL();
} // namespace
status_t VoldNativeService::start() {
IPCThreadState::self()->disableBackgroundScheduling(true);
status_t ret = BinderService<VoldNativeService>::publish();
if (ret != android::OK) {
return ret;
}
sp<ProcessState> ps(ProcessState::self());
ps->startThreadPool();
ps->giveThreadPoolName();
return android::OK;
}
status_t VoldNativeService::dump(int fd, const Vector<String16>& /* args */) {
const binder::Status dump_permission = CheckPermission(kDump);
if (!dump_permission.isOk()) {
dprintf(fd, "%s\n", dump_permission.toString8().c_str());
return PERMISSION_DENIED;
}
ACQUIRE_LOCK;
dprintf(fd, "vold is happy!\n");
return NO_ERROR;
}
binder::Status VoldNativeService::setListener(
const android::sp<android::os::IVoldListener>& listener) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
VolumeManager::Instance()->setListener(listener);
return Ok();
}
binder::Status VoldNativeService::monitor() {
ENFORCE_SYSTEM_OR_ROOT;
// Simply acquire/release each lock for watchdog
{ ACQUIRE_LOCK; }
{ ACQUIRE_CRYPT_LOCK; }
return Ok();
}
binder::Status VoldNativeService::reset() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->reset());
}
binder::Status VoldNativeService::shutdown() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->shutdown());
}
binder::Status VoldNativeService::abortFuse() {
ENFORCE_SYSTEM_OR_ROOT;
// if acquire lock, maybe lead to a deadlock if lock is held by a
// thread that is blocked on a FUSE operation.
// abort fuse doesn't need to access any state, so do not acquire lock
return translate(VolumeManager::Instance()->abortFuse());
}
binder::Status VoldNativeService::onUserAdded(int32_t userId, int32_t userSerial) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->onUserAdded(userId, userSerial));
}
binder::Status VoldNativeService::onUserRemoved(int32_t userId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->onUserRemoved(userId));
}
binder::Status VoldNativeService::onUserStarted(int32_t userId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->onUserStarted(userId));
}
binder::Status VoldNativeService::onUserStopped(int32_t userId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->onUserStopped(userId));
}
binder::Status VoldNativeService::addAppIds(const std::vector<std::string>& packageNames,
const std::vector<int32_t>& appIds) {
return Ok();
}
binder::Status VoldNativeService::addSandboxIds(const std::vector<int32_t>& appIds,
const std::vector<std::string>& sandboxIds) {
return Ok();
}
binder::Status VoldNativeService::onSecureKeyguardStateChanged(bool isShowing) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->onSecureKeyguardStateChanged(isShowing));
}
binder::Status VoldNativeService::partition(const std::string& diskId, int32_t partitionType,
int32_t ratio) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(diskId);
ACQUIRE_LOCK;
auto disk = VolumeManager::Instance()->findDisk(diskId);
if (disk == nullptr) {
return error("Failed to find disk " + diskId);
}
switch (partitionType) {
case PARTITION_TYPE_PUBLIC:
return translate(disk->partitionPublic());
case PARTITION_TYPE_PRIVATE:
return translate(disk->partitionPrivate());
case PARTITION_TYPE_MIXED:
return translate(disk->partitionMixed(ratio));
default:
return error("Unknown type " + std::to_string(partitionType));
}
}
binder::Status VoldNativeService::forgetPartition(const std::string& partGuid,
const std::string& fsUuid) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_HEX(partGuid);
CHECK_ARGUMENT_HEX(fsUuid);
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->forgetPartition(partGuid, fsUuid));
}
binder::Status VoldNativeService::mount(
const std::string& volId, int32_t mountFlags, int32_t mountUserId,
const android::sp<android::os::IVoldMountCallback>& callback) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
auto vol = VolumeManager::Instance()->findVolume(volId);
if (vol == nullptr) {
return error("Failed to find volume " + volId);
}
vol->setMountFlags(mountFlags);
vol->setMountUserId(mountUserId);
vol->setMountCallback(callback);
int res = vol->mount();
vol->setMountCallback(nullptr);
if (res != OK) {
return translate(res);
}
return translate(OK);
}
binder::Status VoldNativeService::unmount(const std::string& volId) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
auto vol = VolumeManager::Instance()->findVolume(volId);
if (vol == nullptr) {
return error("Failed to find volume " + volId);
}
return translate(vol->unmount());
}
binder::Status VoldNativeService::format(const std::string& volId, const std::string& fsType) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
auto vol = VolumeManager::Instance()->findVolume(volId);
if (vol == nullptr) {
return error("Failed to find volume " + volId);
}
return translate(vol->format(fsType));
}
static binder::Status pathForVolId(const std::string& volId, std::string* path) {
if (volId == "private" || volId == "null") {
*path = "/data";
} else {
auto vol = VolumeManager::Instance()->findVolume(volId);
if (vol == nullptr) {
return error("Failed to find volume " + volId);
}
if (vol->getType() != VolumeBase::Type::kPrivate) {
return error("Volume " + volId + " not private");
}
if (vol->getState() != VolumeBase::State::kMounted) {
return error("Volume " + volId + " not mounted");
}
*path = vol->getPath();
if (path->empty()) {
return error("Volume " + volId + " missing path");
}
}
return Ok();
}
binder::Status VoldNativeService::benchmark(
const std::string& volId, const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
std::string path;
auto status = pathForVolId(volId, &path);
if (!status.isOk()) return status;
std::thread([=]() { android::vold::Benchmark(path, listener); }).detach();
return Ok();
}
binder::Status VoldNativeService::moveStorage(
const std::string& fromVolId, const std::string& toVolId,
const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(fromVolId);
CHECK_ARGUMENT_ID(toVolId);
ACQUIRE_LOCK;
auto fromVol = VolumeManager::Instance()->findVolume(fromVolId);
auto toVol = VolumeManager::Instance()->findVolume(toVolId);
if (fromVol == nullptr) {
return error("Failed to find volume " + fromVolId);
} else if (toVol == nullptr) {
return error("Failed to find volume " + toVolId);
}
std::thread([=]() { android::vold::MoveStorage(fromVol, toVol, listener); }).detach();
return Ok();
}
binder::Status VoldNativeService::remountUid(int32_t uid, int32_t remountMode) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->remountUid(uid, remountMode));
}
binder::Status VoldNativeService::remountAppStorageDirs(int uid, int pid,
const std::vector<std::string>& packageNames) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->handleAppStorageDirs(uid, pid,
false /* doUnmount */, packageNames));
}
binder::Status VoldNativeService::unmountAppStorageDirs(int uid, int pid,
const std::vector<std::string>& packageNames) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->handleAppStorageDirs(uid, pid,
true /* doUnmount */, packageNames));
}
binder::Status VoldNativeService::setupAppDir(const std::string& path, int32_t appUid) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(path);
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->setupAppDir(path, appUid));
}
binder::Status VoldNativeService::ensureAppDirsCreated(const std::vector<std::string>& paths,
int32_t appUid) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->ensureAppDirsCreated(paths, appUid));
}
binder::Status VoldNativeService::fixupAppDir(const std::string& path, int32_t appUid) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(path);
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->fixupAppDir(path, appUid));
}
binder::Status VoldNativeService::createObb(const std::string& sourcePath,
const std::string& sourceKey, int32_t ownerGid,
std::string* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(sourcePath);
CHECK_ARGUMENT_HEX(sourceKey);
ACQUIRE_LOCK;
return translate(
VolumeManager::Instance()->createObb(sourcePath, sourceKey, ownerGid, _aidl_return));
}
binder::Status VoldNativeService::destroyObb(const std::string& volId) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->destroyObb(volId));
}
binder::Status VoldNativeService::createStubVolume(const std::string& sourcePath,
const std::string& mountPath,
const std::string& fsType,
const std::string& fsUuid,
const std::string& fsLabel, int32_t flags,
std::string* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(sourcePath);
CHECK_ARGUMENT_PATH(mountPath);
CHECK_ARGUMENT_HEX(fsUuid);
// Label limitation seems to be different between fs (including allowed characters), so checking
// is quite meaningless.
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->createStubVolume(
sourcePath, mountPath, fsType, fsUuid, fsLabel, flags, _aidl_return));
}
binder::Status VoldNativeService::destroyStubVolume(const std::string& volId) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_ID(volId);
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->destroyStubVolume(volId));
}
binder::Status VoldNativeService::fstrim(
int32_t fstrimFlags, const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
std::thread([=]() { android::vold::Trim(listener); }).detach();
return Ok();
}
binder::Status VoldNativeService::runIdleMaint(
const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
std::thread([=]() { android::vold::RunIdleMaint(listener); }).detach();
return Ok();
}
binder::Status VoldNativeService::abortIdleMaint(
const android::sp<android::os::IVoldTaskListener>& listener) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
std::thread([=]() { android::vold::AbortIdleMaint(listener); }).detach();
return Ok();
}
binder::Status VoldNativeService::mountAppFuse(int32_t uid, int32_t mountId,
android::base::unique_fd* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->mountAppFuse(uid, mountId, _aidl_return));
}
binder::Status VoldNativeService::unmountAppFuse(int32_t uid, int32_t mountId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translate(VolumeManager::Instance()->unmountAppFuse(uid, mountId));
}
binder::Status VoldNativeService::openAppFuseFile(int32_t uid, int32_t mountId, int32_t fileId,
int32_t flags,
android::base::unique_fd* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
int fd = VolumeManager::Instance()->openAppFuseFile(uid, mountId, fileId, flags);
if (fd == -1) {
return error("Failed to open AppFuse file for uid: " + std::to_string(uid) +
" mountId: " + std::to_string(mountId) + " fileId: " + std::to_string(fileId) +
" flags: " + std::to_string(flags));
}
*_aidl_return = android::base::unique_fd(fd);
return Ok();
}
binder::Status VoldNativeService::fdeCheckPassword(const std::string& password) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translate(cryptfs_check_passwd(password.c_str()));
}
binder::Status VoldNativeService::fdeRestart() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
// Spawn as thread so init can issue commands back to vold without
// causing deadlock, usually as a result of prep_data_fs.
std::thread(&cryptfs_restart).detach();
return Ok();
}
binder::Status VoldNativeService::fdeComplete(int32_t* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
*_aidl_return = cryptfs_crypto_complete();
return Ok();
}
static int fdeEnableInternal(int32_t passwordType, const std::string& password,
int32_t encryptionFlags) {
bool noUi = (encryptionFlags & VoldNativeService::ENCRYPTION_FLAG_NO_UI) != 0;
for (int tries = 0; tries < 2; ++tries) {
int rc;
if (passwordType == VoldNativeService::PASSWORD_TYPE_DEFAULT) {
rc = cryptfs_enable_default(noUi);
} else {
rc = cryptfs_enable(passwordType, password.c_str(), noUi);
}
if (rc == 0) {
return 0;
} else if (tries == 0) {
KillProcessesWithOpenFiles(DATA_MNT_POINT, SIGKILL);
}
}
return -1;
}
binder::Status VoldNativeService::fdeEnable(int32_t passwordType, const std::string& password,
int32_t encryptionFlags) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
LOG(DEBUG) << "fdeEnable(" << passwordType << ", *, " << encryptionFlags << ")";
if (fscrypt_is_native()) {
LOG(ERROR) << "fscrypt_is_native, fdeEnable invalid";
return error("fscrypt_is_native, fdeEnable invalid");
}
LOG(DEBUG) << "!fscrypt_is_native, spawning fdeEnableInternal";
// Spawn as thread so init can issue commands back to vold without
// causing deadlock, usually as a result of prep_data_fs.
std::thread(&fdeEnableInternal, passwordType, password, encryptionFlags).detach();
return Ok();
}
binder::Status VoldNativeService::fdeChangePassword(int32_t passwordType,
const std::string& password) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translate(cryptfs_changepw(passwordType, password.c_str()));
}
binder::Status VoldNativeService::fdeVerifyPassword(const std::string& password) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translate(cryptfs_verify_passwd(password.c_str()));
}
binder::Status VoldNativeService::fdeGetField(const std::string& key, std::string* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
char buf[PROPERTY_VALUE_MAX];
if (cryptfs_getfield(key.c_str(), buf, sizeof(buf)) != CRYPTO_GETFIELD_OK) {
return error(StringPrintf("Failed to read field %s", key.c_str()));
} else {
*_aidl_return = buf;
return Ok();
}
}
binder::Status VoldNativeService::fdeSetField(const std::string& key, const std::string& value) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translate(cryptfs_setfield(key.c_str(), value.c_str()));
}
binder::Status VoldNativeService::fdeGetPasswordType(int32_t* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
*_aidl_return = cryptfs_get_password_type();
return Ok();
}
binder::Status VoldNativeService::fdeGetPassword(std::string* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
const char* res = cryptfs_get_password();
if (res != nullptr) {
*_aidl_return = res;
}
return Ok();
}
binder::Status VoldNativeService::fdeClearPassword() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
cryptfs_clear_password();
return Ok();
}
binder::Status VoldNativeService::fbeEnable() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_initialize_systemwide_keys());
}
binder::Status VoldNativeService::mountDefaultEncrypted() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
if (!fscrypt_is_native()) {
// Spawn as thread so init can issue commands back to vold without
// causing deadlock, usually as a result of prep_data_fs.
std::thread(&cryptfs_mount_default_encrypted).detach();
}
return Ok();
}
binder::Status VoldNativeService::initUser0() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_init_user0());
}
binder::Status VoldNativeService::isConvertibleToFbe(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
*_aidl_return = cryptfs_isConvertibleToFBE() != 0;
return Ok();
}
binder::Status VoldNativeService::mountFstab(const std::string& blkDevice,
const std::string& mountPoint) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translateBool(
fscrypt_mount_metadata_encrypted(blkDevice, mountPoint, false, false, "null"));
}
binder::Status VoldNativeService::encryptFstab(const std::string& blkDevice,
const std::string& mountPoint, bool shouldFormat,
const std::string& fsType) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translateBool(
fscrypt_mount_metadata_encrypted(blkDevice, mountPoint, true, shouldFormat, fsType));
}
binder::Status VoldNativeService::setStorageBindingSeed(const std::vector<uint8_t>& seed) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(setKeyStorageBindingSeed(seed));
}
binder::Status VoldNativeService::createUserKey(int32_t userId, int32_t userSerial,
bool ephemeral) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_vold_create_user_key(userId, userSerial, ephemeral));
}
binder::Status VoldNativeService::destroyUserKey(int32_t userId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_destroy_user_key(userId));
}
static bool token_empty(const std::string& token) {
return token.size() == 0 || token == "!";
}
binder::Status VoldNativeService::addUserKeyAuth(int32_t userId, int32_t userSerial,
const std::string& token,
const std::string& secret) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
if (!token_empty(token)) {
LOG(ERROR) << "Vold doesn't use auth tokens, but non-empty token passed to addUserKeyAuth.";
return binder::Status::fromServiceSpecificError(-EINVAL);
}
return translateBool(fscrypt_add_user_key_auth(userId, userSerial, secret));
}
binder::Status VoldNativeService::clearUserKeyAuth(int32_t userId, int32_t userSerial,
const std::string& token,
const std::string& secret) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
if (!token_empty(token)) {
LOG(ERROR)
<< "Vold doesn't use auth tokens, but non-empty token passed to clearUserKeyAuth.";
return binder::Status::fromServiceSpecificError(-EINVAL);
}
return translateBool(fscrypt_clear_user_key_auth(userId, userSerial, secret));
}
binder::Status VoldNativeService::fixateNewestUserKeyAuth(int32_t userId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_fixate_newest_user_key_auth(userId));
}
binder::Status VoldNativeService::getUnlockedUsers(std::vector<int>* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
*_aidl_return = fscrypt_get_unlocked_users();
return Ok();
}
binder::Status VoldNativeService::unlockUserKey(int32_t userId, int32_t userSerial,
const std::string& token,
const std::string& secret) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
if (!token_empty(token)) {
LOG(ERROR) << "Vold doesn't use auth tokens, but non-empty token passed to unlockUserKey.";
return binder::Status::fromServiceSpecificError(-EINVAL);
}
return translateBool(fscrypt_unlock_user_key(userId, userSerial, secret));
}
binder::Status VoldNativeService::lockUserKey(int32_t userId) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_lock_user_key(userId));
}
binder::Status VoldNativeService::prepareUserStorage(const std::optional<std::string>& uuid,
int32_t userId, int32_t userSerial,
int32_t flags) {
ENFORCE_SYSTEM_OR_ROOT;
std::string empty_string = "";
auto uuid_ = uuid ? *uuid : empty_string;
CHECK_ARGUMENT_HEX(uuid_);
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_prepare_user_storage(uuid_, userId, userSerial, flags));
}
binder::Status VoldNativeService::destroyUserStorage(const std::optional<std::string>& uuid,
int32_t userId, int32_t flags) {
ENFORCE_SYSTEM_OR_ROOT;
std::string empty_string = "";
auto uuid_ = uuid ? *uuid : empty_string;
CHECK_ARGUMENT_HEX(uuid_);
ACQUIRE_CRYPT_LOCK;
return translateBool(fscrypt_destroy_user_storage(uuid_, userId, flags));
}
binder::Status VoldNativeService::prepareSandboxForApp(const std::string& packageName,
int32_t appId, const std::string& sandboxId,
int32_t userId) {
return Ok();
}
binder::Status VoldNativeService::destroySandboxForApp(const std::string& packageName,
const std::string& sandboxId,
int32_t userId) {
return Ok();
}
binder::Status VoldNativeService::startCheckpoint(int32_t retry) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_startCheckpoint(retry);
}
binder::Status VoldNativeService::needsRollback(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
*_aidl_return = cp_needsRollback();
return Ok();
}
binder::Status VoldNativeService::needsCheckpoint(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
*_aidl_return = cp_needsCheckpoint();
return Ok();
}
binder::Status VoldNativeService::isCheckpointing(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
*_aidl_return = cp_isCheckpointing();
return Ok();
}
binder::Status VoldNativeService::commitChanges() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_commitChanges();
}
binder::Status VoldNativeService::prepareCheckpoint() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_prepareCheckpoint();
}
binder::Status VoldNativeService::restoreCheckpoint(const std::string& mountPoint) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(mountPoint);
ACQUIRE_LOCK;
return cp_restoreCheckpoint(mountPoint);
}
binder::Status VoldNativeService::restoreCheckpointPart(const std::string& mountPoint, int count) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(mountPoint);
ACQUIRE_LOCK;
return cp_restoreCheckpoint(mountPoint, count);
}
binder::Status VoldNativeService::markBootAttempt() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_markBootAttempt();
}
binder::Status VoldNativeService::abortChanges(const std::string& message, bool retry) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
cp_abortChanges(message, retry);
return Ok();
}
binder::Status VoldNativeService::supportsCheckpoint(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_supportsCheckpoint(*_aidl_return);
}
binder::Status VoldNativeService::supportsBlockCheckpoint(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_supportsBlockCheckpoint(*_aidl_return);
}
binder::Status VoldNativeService::supportsFileCheckpoint(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return cp_supportsFileCheckpoint(*_aidl_return);
}
binder::Status VoldNativeService::resetCheckpoint() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
cp_resetCheckpoint();
return Ok();
}
static void initializeIncFs() {
// Obtaining IncFS features triggers initialization of IncFS.
incfs::features();
}
// This is missing from the kernel UAPI headers.
#define ST_RDONLY 0x0001
// FDE devices run the post-fs-data trigger (and hence also earlyBootEnded)
// multiple times, sometimes prior to the real /data being mounted. That causes
// keystore2 to try to open a file in /data, causing it to panic or have to be
// killed by vold later, causing problems (vold failing to connect to keystore2,
// or keystore2 operations erroring out later). As a workaround to keep FDE
// working, ignore these too-early calls to earlyBootEnded.
//
// This can be removed when support for FDE is removed.
static bool IgnoreEarlyBootEnded() {
// The statfs("/data") below should be sufficient by itself, but to be safe
// we also explicitly return false on FBE devices. (This really should be
// ro.crypto.type != "block" for "non-FDE devices", but on FDE devices this
// is sometimes called before ro.crypto.type gets set.)
if (fscrypt_is_native()) return false;
struct statfs buf;
if (statfs(DATA_MNT_POINT, &buf) != 0) {
PLOG(ERROR) << "statfs(\"/data\") failed";
return false;
}
if (buf.f_type == TMPFS_MAGIC || (buf.f_flags & ST_RDONLY)) {
LOG(INFO) << "Ignoring earlyBootEnded since real /data isn't mounted yet";
return true;
}
return false;
}
binder::Status VoldNativeService::earlyBootEnded() {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
if (IgnoreEarlyBootEnded()) return Ok();
initializeIncFs();
Keystore::earlyBootEnded();
return Ok();
}
binder::Status VoldNativeService::incFsEnabled(bool* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
*_aidl_return = incfs::enabled();
return Ok();
}
binder::Status VoldNativeService::mountIncFs(
const std::string& backingPath, const std::string& targetDir, int32_t flags,
const std::string& sysfsName,
::android::os::incremental::IncrementalFileSystemControlParcel* _aidl_return) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(backingPath);
CHECK_ARGUMENT_PATH(targetDir);
auto control = incfs::mount(backingPath, targetDir,
{.flags = IncFsMountFlags(flags),
// Mount with read timeouts.
.defaultReadTimeoutMs = INCFS_DEFAULT_READ_TIMEOUT_MS,
// Mount with read logs disabled.
.readLogBufferPages = 0,
.sysfsName = sysfsName.c_str()});
if (!control) {
return translate(-errno);
}
auto fds = control.releaseFds();
using android::base::unique_fd;
_aidl_return->cmd.reset(unique_fd(fds[CMD].release()));
_aidl_return->pendingReads.reset(unique_fd(fds[PENDING_READS].release()));
_aidl_return->log.reset(unique_fd(fds[LOGS].release()));
if (fds[BLOCKS_WRITTEN].ok()) {
_aidl_return->blocksWritten.emplace(unique_fd(fds[BLOCKS_WRITTEN].release()));
}
return Ok();
}
binder::Status VoldNativeService::unmountIncFs(const std::string& dir) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(dir);
return translate(incfs::unmount(dir));
}
binder::Status VoldNativeService::setIncFsMountOptions(
const ::android::os::incremental::IncrementalFileSystemControlParcel& control,
bool enableReadLogs, bool enableReadTimeouts, const std::string& sysfsName) {
ENFORCE_SYSTEM_OR_ROOT;
auto incfsControl =
incfs::createControl(control.cmd.get(), control.pendingReads.get(), control.log.get(),
control.blocksWritten ? control.blocksWritten->get() : -1);
auto cleanupFunc = [](auto incfsControl) {
for (auto& fd : incfsControl->releaseFds()) {
(void)fd.release();
}
};
auto cleanup =
std::unique_ptr<incfs::Control, decltype(cleanupFunc)>(&incfsControl, cleanupFunc);
constexpr auto minReadLogBufferPages = INCFS_DEFAULT_PAGE_READ_BUFFER_PAGES;
constexpr auto maxReadLogBufferPages = 8 * INCFS_DEFAULT_PAGE_READ_BUFFER_PAGES;
auto options = incfs::MountOptions{
.defaultReadTimeoutMs =
enableReadTimeouts ? INCFS_DEFAULT_READ_TIMEOUT_MS : kIncFsReadNoTimeoutMs,
.readLogBufferPages = enableReadLogs ? maxReadLogBufferPages : 0,
.sysfsName = sysfsName.c_str()};
for (;;) {
const auto error = incfs::setOptions(incfsControl, options);
if (!error) {
return Ok();
}
if (!enableReadLogs || error != -ENOMEM) {
return binder::Status::fromServiceSpecificError(error);
}
// In case of memory allocation error retry with a smaller buffer.
options.readLogBufferPages /= 2;
if (options.readLogBufferPages < minReadLogBufferPages) {
return binder::Status::fromServiceSpecificError(error);
}
}
// unreachable, but makes the compiler happy
return Ok();
}
binder::Status VoldNativeService::bindMount(const std::string& sourceDir,
const std::string& targetDir) {
ENFORCE_SYSTEM_OR_ROOT;
CHECK_ARGUMENT_PATH(sourceDir);
CHECK_ARGUMENT_PATH(targetDir);
return translate(incfs::bindMount(sourceDir, targetDir));
}
binder::Status VoldNativeService::destroyDsuMetadataKey(const std::string& dsuSlot) {
ENFORCE_SYSTEM_OR_ROOT;
ACQUIRE_LOCK;
return translateBool(destroy_dsu_metadata_key(dsuSlot));
}
} // namespace vold
} // namespace android
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