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vdc.cpp
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vdc.cpp
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/*
* Copyright (C) 2008 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 <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/un.h>
#include "android/os/IVold.h"
#include <android-base/logging.h>
#include <android-base/parseint.h>
#include <android-base/strings.h>
#include <android-base/stringprintf.h>
#include <binder/IServiceManager.h>
#include <binder/Status.h>
#include <private/android_filesystem_config.h>
/* Allowed values for type in the structure below */
#define CRYPT_TYPE_PASSWORD \
0 /* master_key is encrypted with a password \
* Must be zero to be compatible with pre-L \
* devices where type is always password.*/
#define CRYPT_TYPE_DEFAULT \
1 /* master_key is encrypted with default \
* password */
#define CRYPT_TYPE_PATTERN 2 /* master_key is encrypted with a pattern */
#define CRYPT_TYPE_PIN 3 /* master_key is encrypted with a pin */
#define CRYPT_TYPE_MAX_TYPE 3 /* type cannot be larger than this value */
static void usage(char* progname);
static android::sp<android::IBinder> getServiceAggressive() {
android::sp<android::IBinder> res;
auto sm = android::defaultServiceManager();
auto name = android::String16("vold");
for (int i = 0; i < 5000; i++) {
res = sm->checkService(name);
if (res) {
LOG(VERBOSE) << "Waited " << (i * 10) << "ms for vold";
break;
}
usleep(10000); // 10ms
}
return res;
}
static void checkStatus(std::vector<std::string>& cmd, android::binder::Status status) {
if (status.isOk()) return;
std::string command = ::android::base::Join(cmd, " ");
LOG(ERROR) << "Command: " << command << " Failed: " << status.toString8().string();
exit(ENOTTY);
}
static int getType(const std::string &type) {
if (type == "default") {
return CRYPT_TYPE_DEFAULT;
} else if (type == "password") {
return CRYPT_TYPE_PASSWORD;
} else if (type == "pin") {
return CRYPT_TYPE_PIN;
} else if (type == "pattern") {
return CRYPT_TYPE_PATTERN;
} else {
return -1;
}
}
int main(int argc, char** argv) {
setenv("ANDROID_LOG_TAGS", "*:v", 1);
if (getppid() == 1) {
// If init is calling us then it's during boot and we should log to kmsg
android::base::InitLogging(argv, &android::base::KernelLogger);
} else {
android::base::InitLogging(argv, &android::base::StderrLogger);
}
std::vector<std::string> args(argv + 1, argv + argc);
if (args.size() > 0 && args[0] == "--wait") {
// Just ignore the --wait flag
args.erase(args.begin());
}
if (args.size() < 2) {
usage(argv[0]);
exit(5);
}
android::sp<android::IBinder> binder = getServiceAggressive();
if (!binder) {
LOG(ERROR) << "Failed to obtain vold Binder";
exit(EINVAL);
}
auto vold = android::interface_cast<android::os::IVold>(binder);
if (args[0] == "cryptfs" && args[1] == "enablefilecrypto") {
checkStatus(args, vold->fbeEnable());
} else if (args[0] == "cryptfs" && args[1] == "init_user0") {
checkStatus(args, vold->initUser0());
} else if (args[0] == "cryptfs" && args[1] == "enablecrypto") {
int passwordType = android::os::IVold::PASSWORD_TYPE_DEFAULT;
int encryptionFlags = android::os::IVold::ENCRYPTION_FLAG_NO_UI;
checkStatus(args, vold->fdeEnable(passwordType, "", encryptionFlags));
} else if (args[0] == "cryptfs" && args[1] == "mountdefaultencrypted") {
checkStatus(args, vold->mountDefaultEncrypted());
} else if (args[0] == "volume" && args[1] == "abort_fuse") {
checkStatus(args, vold->abortFuse());
} else if (args[0] == "volume" && args[1] == "shutdown") {
checkStatus(args, vold->shutdown());
} else if (args[0] == "volume" && args[1] == "reset") {
checkStatus(args, vold->reset());
} else if (args[0] == "cryptfs" && args[1] == "checkEncryption" && args.size() == 3) {
checkStatus(args, vold->checkEncryption(args[2]));
} else if (args[0] == "cryptfs" && args[1] == "mountFstab" && args.size() == 4) {
checkStatus(args, vold->mountFstab(args[2], args[3]));
} else if (args[0] == "cryptfs" && args[1] == "encryptFstab" && args.size() == 4) {
checkStatus(args, vold->encryptFstab(args[2], args[3]));
} else if (args[0] == "cryptfs" && args[1] == "changepw" && args.size() == 5) {
int type = getType(args[2]);
checkStatus(args, vold->fdeChangePassword(type, args[3], args[4]));
} else if (args[0] == "checkpoint" && args[1] == "supportsCheckpoint" && args.size() == 2) {
bool supported = false;
checkStatus(args, vold->supportsCheckpoint(&supported));
return supported ? 1 : 0;
} else if (args[0] == "checkpoint" && args[1] == "supportsBlockCheckpoint" &&
args.size() == 2) {
bool supported = false;
checkStatus(args, vold->supportsBlockCheckpoint(&supported));
return supported ? 1 : 0;
} else if (args[0] == "checkpoint" && args[1] == "supportsFileCheckpoint" && args.size() == 2) {
bool supported = false;
checkStatus(args, vold->supportsFileCheckpoint(&supported));
return supported ? 1 : 0;
} else if (args[0] == "checkpoint" && args[1] == "startCheckpoint" && args.size() == 3) {
int retry;
if (!android::base::ParseInt(args[2], &retry)) exit(EINVAL);
checkStatus(args, vold->startCheckpoint(retry));
} else if (args[0] == "checkpoint" && args[1] == "needsCheckpoint" && args.size() == 2) {
bool enabled = false;
checkStatus(args, vold->needsCheckpoint(&enabled));
return enabled ? 1 : 0;
} else if (args[0] == "checkpoint" && args[1] == "needsRollback" && args.size() == 2) {
bool enabled = false;
checkStatus(args, vold->needsRollback(&enabled));
return enabled ? 1 : 0;
} else if (args[0] == "checkpoint" && args[1] == "commitChanges" && args.size() == 2) {
checkStatus(args, vold->commitChanges());
} else if (args[0] == "checkpoint" && args[1] == "prepareCheckpoint" && args.size() == 2) {
checkStatus(args, vold->prepareCheckpoint());
} else if (args[0] == "checkpoint" && args[1] == "restoreCheckpoint" && args.size() == 3) {
checkStatus(args, vold->restoreCheckpoint(args[2]));
} else if (args[0] == "checkpoint" && args[1] == "restoreCheckpointPart" && args.size() == 4) {
int count;
if (!android::base::ParseInt(args[3], &count)) exit(EINVAL);
checkStatus(args, vold->restoreCheckpointPart(args[2], count));
} else if (args[0] == "checkpoint" && args[1] == "markBootAttempt" && args.size() == 2) {
checkStatus(args, vold->markBootAttempt());
} else if (args[0] == "checkpoint" && args[1] == "abortChanges" && args.size() == 4) {
int retry;
if (!android::base::ParseInt(args[2], &retry)) exit(EINVAL);
checkStatus(args, vold->abortChanges(args[2], retry != 0));
} else if (args[0] == "checkpoint" && args[1] == "resetCheckpoint") {
checkStatus(args, vold->resetCheckpoint());
} else {
LOG(ERROR) << "Raw commands are no longer supported";
exit(EINVAL);
}
return 0;
}
static void usage(char* progname) {
LOG(INFO) << "Usage: " << progname << " [--wait] <system> <subcommand> [args...]";
}