/*
* Copyright (c) 2000, 2009, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
#include "jni.h"
#include "jni_util.h"
#include "jvm.h"
#include "jlong.h"
#include "sun_nio_ch_FileDispatcherImpl.h"
#include "java_lang_Long.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <sys/uio.h>
#include <unistd.h>
#include "nio.h"
#include "nio_util.h"
#include "JNIHelp.h"
#define NATIVE_METHOD(className, functionName, signature) \
{ #functionName, signature, (void*)(className ## _ ## functionName) }
#ifdef _ALLBSD_SOURCE
#define stat64 stat
#define flock64 flock
#define off64_t off_t
#define F_SETLKW64 F_SETLKW
#define F_SETLK64 F_SETLK
#define pread64 pread
#define pwrite64 pwrite
#define ftruncate64 ftruncate
#define fstat64 fstat
#define fdatasync fsync
#endif
JNIEXPORT jint JNICALL
FileDispatcherImpl_read0(JNIEnv *env, jclass clazz,
jobject fdo, jlong address, jint len)
{
jint fd = fdval(env, fdo);
void *buf = (void *)jlong_to_ptr(address);
return convertReturnVal(env, read(fd, buf, len), JNI_TRUE);
}
JNIEXPORT jint JNICALL
FileDispatcherImpl_pread0(JNIEnv *env, jclass clazz, jobject fdo,
jlong address, jint len, jlong offset)
{
jint fd = fdval(env, fdo);
void *buf = (void *)jlong_to_ptr(address);
return convertReturnVal(env, pread64(fd, buf, len, offset), JNI_TRUE);
}
JNIEXPORT jlong JNICALL
FileDispatcherImpl_readv0(JNIEnv *env, jclass clazz,
jobject fdo, jlong address, jint len)
{
jint fd = fdval(env, fdo);
struct iovec *iov = (struct iovec *)jlong_to_ptr(address);
return convertLongReturnVal(env, readv(fd, iov, len), JNI_TRUE);
}
JNIEXPORT jint JNICALL
FileDispatcherImpl_write0(JNIEnv *env, jclass clazz,
jobject fdo, jlong address, jint len)
{
jint fd = fdval(env, fdo);
void *buf = (void *)jlong_to_ptr(address);
return convertReturnVal(env, write(fd, buf, len), JNI_FALSE);
}
JNIEXPORT jint JNICALL
FileDispatcherImpl_pwrite0(JNIEnv *env, jclass clazz, jobject fdo,
jlong address, jint len, jlong offset)
{
jint fd = fdval(env, fdo);
void *buf = (void *)jlong_to_ptr(address);
return convertReturnVal(env, pwrite64(fd, buf, len, offset), JNI_FALSE);
}
JNIEXPORT jlong JNICALL
FileDispatcherImpl_writev0(JNIEnv *env, jclass clazz,
jobject fdo, jlong address, jint len)
{
jint fd = fdval(env, fdo);
struct iovec *iov = (struct iovec *)jlong_to_ptr(address);
return convertLongReturnVal(env, writev(fd, iov, len), JNI_FALSE);
}
static jlong
handle(JNIEnv *env, jlong rv, char *msg)
{
if (rv >= 0)
return rv;
if (errno == EINTR)
return IOS_INTERRUPTED;
JNU_ThrowIOExceptionWithLastError(env, msg);
return IOS_THROWN;
}
JNIEXPORT jint JNICALL
FileDispatcherImpl_force0(JNIEnv *env, jobject this,
jobject fdo, jboolean md)
{
jint fd = fdval(env, fdo);
int result = 0;
if (md == JNI_FALSE) {
result = fdatasync(fd);
} else {
result = fsync(fd);
}
return handle(env, result, "Force failed");
}
JNIEXPORT jint JNICALL
FileDispatcherImpl_truncate0(JNIEnv *env, jobject this,
jobject fdo, jlong size)
{
return handle(env,
ftruncate64(fdval(env, fdo), size),
"Truncation failed");
}
JNIEXPORT jlong JNICALL
FileDispatcherImpl_size0(JNIEnv *env, jobject this, jobject fdo)
{
struct stat64 fbuf;
if (fstat64(fdval(env, fdo), &fbuf) < 0)
return handle(env, -1, "Size failed");
return fbuf.st_size;
}
JNIEXPORT jint JNICALL
FileDispatcherImpl_lock0(JNIEnv *env, jobject this, jobject fdo,
jboolean block, jlong pos, jlong size,
jboolean shared)
{
jint fd = fdval(env, fdo);
jint lockResult = 0;
int cmd = 0;
struct flock64 fl;
fl.l_whence = SEEK_SET;
if (size == (jlong)java_lang_Long_MAX_VALUE) {
fl.l_len = (off64_t)0;
} else {
fl.l_len = (off64_t)size;
}
fl.l_start = (off64_t)pos;
if (shared == JNI_TRUE) {
fl.l_type = F_RDLCK;
} else {
fl.l_type = F_WRLCK;
}
if (block == JNI_TRUE) {
cmd = F_SETLKW64;
} else {
cmd = F_SETLK64;
}
lockResult = fcntl(fd, cmd, &fl);
if (lockResult < 0) {
if ((cmd == F_SETLK64) && (errno == EAGAIN || errno == EACCES))
return sun_nio_ch_FileDispatcherImpl_NO_LOCK;
if (errno == EINTR)
return sun_nio_ch_FileDispatcherImpl_INTERRUPTED;
JNU_ThrowIOExceptionWithLastError(env, "Lock failed");
}
return 0;
}
JNIEXPORT void JNICALL
FileDispatcherImpl_release0(JNIEnv *env, jobject this,
jobject fdo, jlong pos, jlong size)
{
jint fd = fdval(env, fdo);
jint lockResult = 0;
struct flock64 fl;
int cmd = F_SETLK64;
fl.l_whence = SEEK_SET;
if (size == (jlong)java_lang_Long_MAX_VALUE) {
fl.l_len = (off64_t)0;
} else {
fl.l_len = (off64_t)size;
}
fl.l_start = (off64_t)pos;
fl.l_type = F_UNLCK;
lockResult = fcntl(fd, cmd, &fl);
if (lockResult < 0) {
JNU_ThrowIOExceptionWithLastError(env, "Release failed");
}
}
static void closeFileDescriptor(JNIEnv *env, int fd) {
if (fd != -1) {
int result = close(fd);
if (result < 0)
JNU_ThrowIOExceptionWithLastError(env, "Close failed");
}
}
JNIEXPORT void JNICALL
FileDispatcherImpl_close0(JNIEnv *env, jclass clazz, jobject fdo)
{
jint fd = fdval(env, fdo);
closeFileDescriptor(env, fd);
}
JNIEXPORT void JNICALL
FileDispatcherImpl_preClose0(JNIEnv *env, jclass clazz, jobject fdo)
{
jint fd = fdval(env, fdo);
int preCloseFD = open("/dev/null", O_RDWR | O_CLOEXEC);
if (preCloseFD < 0) {
JNU_ThrowIOExceptionWithLastError(env, "open(\"/dev/null\") failed");
return;
}
if (dup2(preCloseFD, fd) < 0) {
JNU_ThrowIOExceptionWithLastError(env, "dup2 failed");
}
close(preCloseFD);
}
JNIEXPORT void JNICALL
FileDispatcherImpl_closeIntFD(JNIEnv *env, jclass clazz, jint fd)
{
closeFileDescriptor(env, fd);
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(FileDispatcherImpl, closeIntFD, "(I)V"),
NATIVE_METHOD(FileDispatcherImpl, preClose0, "(Ljava/io/FileDescriptor;)V"),
NATIVE_METHOD(FileDispatcherImpl, close0, "(Ljava/io/FileDescriptor;)V"),
NATIVE_METHOD(FileDispatcherImpl, release0, "(Ljava/io/FileDescriptor;JJ)V"),
NATIVE_METHOD(FileDispatcherImpl, lock0, "(Ljava/io/FileDescriptor;ZJJZ)I"),
NATIVE_METHOD(FileDispatcherImpl, size0, "(Ljava/io/FileDescriptor;)J"),
NATIVE_METHOD(FileDispatcherImpl, truncate0, "(Ljava/io/FileDescriptor;J)I"),
NATIVE_METHOD(FileDispatcherImpl, force0, "(Ljava/io/FileDescriptor;Z)I"),
NATIVE_METHOD(FileDispatcherImpl, writev0, "(Ljava/io/FileDescriptor;JI)J"),
NATIVE_METHOD(FileDispatcherImpl, pwrite0, "(Ljava/io/FileDescriptor;JIJ)I"),
NATIVE_METHOD(FileDispatcherImpl, write0, "(Ljava/io/FileDescriptor;JI)I"),
NATIVE_METHOD(FileDispatcherImpl, readv0, "(Ljava/io/FileDescriptor;JI)J"),
NATIVE_METHOD(FileDispatcherImpl, pread0, "(Ljava/io/FileDescriptor;JIJ)I"),
NATIVE_METHOD(FileDispatcherImpl, read0, "(Ljava/io/FileDescriptor;JI)I"),
};
void register_sun_nio_ch_FileDispatcherImpl(JNIEnv* env) {
jniRegisterNativeMethods(env, "sun/nio/ch/FileDispatcherImpl", gMethods, NELEM(gMethods));
}