blob: 673a6e20a9c098f6cbe9704795b7e0d49ea7f96f [file] [log] [blame]
/*
* Copyright (C) 2010 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 <android_runtime/AndroidRuntime.h>
#include <JNIHelp.h>
#include <jni.h>
#include <utils/misc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <inttypes.h>
#include <fcntl.h>
namespace android {
uint64_t get_block_device_size(int fd)
{
uint64_t size = 0;
int ret;
ret = ioctl(fd, BLKGETSIZE64, &size);
if (ret)
return 0;
return size;
}
static jlong com_android_server_PeristentDataBlockService_getBlockDeviceSize(JNIEnv *env, jclass, jstring jpath) {
const char *path = env->GetStringUTFChars(jpath, 0);
int fd = open(path, O_RDONLY);
if (fd < 0)
return 0;
return get_block_device_size(fd);
}
static JNINativeMethod sMethods[] = {
/* name, signature, funcPtr */
{"getBlockDeviceSize", "(Ljava/lang/String;)J", (void*)com_android_server_PeristentDataBlockService_getBlockDeviceSize},
};
int register_android_server_PersistentDataBlockService(JNIEnv* env)
{
return jniRegisterNativeMethods(env, "com/android/server/PersistentDataBlockService",
sMethods, NELEM(sMethods));
}
} /* namespace android */