author | adinn |
Tue, 20 Aug 2019 10:11:53 +0100 | |
changeset 57804 | 9b7b9f16dfd9 |
parent 55753 | b9798272720b |
child 58679 | 9c3209ff7550 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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#include <sys/mman.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include <sys/types.h> |
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#include <unistd.h> |
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#if defined(__linux__) || defined(__solaris__) |
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#include <sys/sendfile.h> |
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#elif defined(_AIX) |
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#include <string.h> |
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#include <sys/socket.h> |
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#elif defined(_ALLBSD_SOURCE) |
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#include <sys/socket.h> |
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#include <sys/uio.h> |
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#define lseek64 lseek |
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#define mmap64 mmap |
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#endif |
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#include "jni.h" |
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#include "jni_util.h" |
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#include "jlong.h" |
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#include "nio.h" |
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#include "nio_util.h" |
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#include "sun_nio_ch_FileChannelImpl.h" |
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#include "java_lang_Integer.h" |
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#include <assert.h> |
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static jfieldID chan_fd; /* jobject 'fd' in sun.nio.ch.FileChannelImpl */ |
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JNIEXPORT jlong JNICALL |
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Java_sun_nio_ch_FileChannelImpl_initIDs(JNIEnv *env, jclass clazz) |
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{ |
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jlong pageSize = sysconf(_SC_PAGESIZE); |
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chan_fd = (*env)->GetFieldID(env, clazz, "fd", "Ljava/io/FileDescriptor;"); |
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return pageSize; |
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} |
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static jlong |
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handle(JNIEnv *env, jlong rv, char *msg) |
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{ |
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if (rv >= 0) |
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return rv; |
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if (errno == EINTR) |
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return IOS_INTERRUPTED; |
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JNU_ThrowIOExceptionWithLastError(env, msg); |
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return IOS_THROWN; |
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} |
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JNIEXPORT jlong JNICALL |
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Java_sun_nio_ch_FileChannelImpl_map0(JNIEnv *env, jobject this, |
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jint prot, jlong off, jlong len, jboolean map_sync) |
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{ |
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void *mapAddress = 0; |
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jobject fdo = (*env)->GetObjectField(env, this, chan_fd); |
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jint fd = fdval(env, fdo); |
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int protections = 0; |
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int flags = 0; |
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// should never be called with map_sync and prot == PRIVATE |
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assert((prot != sun_nio_ch_FileChannelImpl_MAP_PV) || !map_sync); |
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if (prot == sun_nio_ch_FileChannelImpl_MAP_RO) { |
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protections = PROT_READ; |
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flags = MAP_SHARED; |
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} else if (prot == sun_nio_ch_FileChannelImpl_MAP_RW) { |
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protections = PROT_WRITE | PROT_READ; |
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flags = MAP_SHARED; |
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} else if (prot == sun_nio_ch_FileChannelImpl_MAP_PV) { |
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protections = PROT_WRITE | PROT_READ; |
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flags = MAP_PRIVATE; |
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} |
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// if MAP_SYNC and MAP_SHARED_VALIDATE are not defined then it is |
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// best to define them here. This ensures the code compiles on old |
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// OS releases which do not provide the relevant headers. If run |
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// on the same machine then it will work if the kernel contains |
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// the necessary support otherwise mmap should fail with an |
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// invalid argument error |
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#ifndef MAP_SYNC |
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#define MAP_SYNC 0x80000 |
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#endif |
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#ifndef MAP_SHARED_VALIDATE |
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#define MAP_SHARED_VALIDATE 0x03 |
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#endif |
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if (map_sync) { |
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// ensure |
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// 1) this is Linux on AArch64 or x86_64 |
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// 2) the mmap APIs are available/ at compile time |
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#if !defined(LINUX) || ! (defined(aarch64) || (defined(amd64) && defined(_LP64))) |
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// TODO - implement for solaris/AIX/BSD/WINDOWS and for 32 bit |
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JNU_ThrowInternalError(env, "should never call map on platform where MAP_SYNC is unimplemented"); |
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return IOS_THROWN; |
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#else |
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flags |= MAP_SYNC | MAP_SHARED_VALIDATE; |
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#endif |
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} |
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mapAddress = mmap64( |
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0, /* Let OS decide location */ |
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len, /* Number of bytes to map */ |
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protections, /* File permissions */ |
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flags, /* Changes are shared */ |
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fd, /* File descriptor of mapped file */ |
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off); /* Offset into file */ |
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if (mapAddress == MAP_FAILED) { |
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if (map_sync && errno == ENOTSUP) { |
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JNU_ThrowIOExceptionWithLastError(env, "map with mode MAP_SYNC unsupported"); |
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return IOS_THROWN; |
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} |
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if (errno == ENOMEM) { |
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JNU_ThrowOutOfMemoryError(env, "Map failed"); |
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return IOS_THROWN; |
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} |
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return handle(env, -1, "Map failed"); |
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} |
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return ((jlong) (unsigned long) mapAddress); |
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} |
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JNIEXPORT jint JNICALL |
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Java_sun_nio_ch_FileChannelImpl_unmap0(JNIEnv *env, jobject this, |
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jlong address, jlong len) |
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{ |
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void *a = (void *)jlong_to_ptr(address); |
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return handle(env, |
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munmap(a, (size_t)len), |
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"Unmap failed"); |
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} |
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JNIEXPORT jlong JNICALL |
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Java_sun_nio_ch_FileChannelImpl_transferTo0(JNIEnv *env, jobject this, |
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jobject srcFDO, |
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jlong position, jlong count, |
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jobject dstFDO) |
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{ |
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jint srcFD = fdval(env, srcFDO); |
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jint dstFD = fdval(env, dstFDO); |
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#if defined(__linux__) |
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off64_t offset = (off64_t)position; |
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jlong n = sendfile64(dstFD, srcFD, &offset, (size_t)count); |
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if (n < 0) { |
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if (errno == EAGAIN) |
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return IOS_UNAVAILABLE; |
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if ((errno == EINVAL) && ((ssize_t)count >= 0)) |
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return IOS_UNSUPPORTED_CASE; |
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if (errno == EINTR) { |
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return IOS_INTERRUPTED; |
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} |
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JNU_ThrowIOExceptionWithLastError(env, "Transfer failed"); |
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return IOS_THROWN; |
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} |
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return n; |
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#elif defined (__solaris__) |
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sendfilevec64_t sfv; |
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size_t numBytes = 0; |
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jlong result; |
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sfv.sfv_fd = srcFD; |
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sfv.sfv_flag = 0; |
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sfv.sfv_off = (off64_t)position; |
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sfv.sfv_len = count; |
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result = sendfilev64(dstFD, &sfv, 1, &numBytes); |
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/* Solaris sendfilev() will return -1 even if some bytes have been |
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* transferred, so we check numBytes first. |
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*/ |
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if (numBytes > 0) |
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return numBytes; |
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if (result < 0) { |
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if (errno == EAGAIN) |
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return IOS_UNAVAILABLE; |
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if (errno == EOPNOTSUPP) |
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return IOS_UNSUPPORTED_CASE; |
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if ((errno == EINVAL) && ((ssize_t)count >= 0)) |
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return IOS_UNSUPPORTED_CASE; |
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if (errno == EINTR) |
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return IOS_INTERRUPTED; |
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JNU_ThrowIOExceptionWithLastError(env, "Transfer failed"); |
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return IOS_THROWN; |
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} |
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return result; |
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#elif defined(__APPLE__) |
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off_t numBytes; |
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int result; |
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|
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numBytes = count; |
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result = sendfile(srcFD, dstFD, position, &numBytes, NULL, 0); |
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if (numBytes > 0) |
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return numBytes; |
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|
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if (result == -1) { |
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if (errno == EAGAIN) |
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return IOS_UNAVAILABLE; |
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if (errno == EOPNOTSUPP || errno == ENOTSOCK || errno == ENOTCONN) |
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return IOS_UNSUPPORTED_CASE; |
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if ((errno == EINVAL) && ((ssize_t)count >= 0)) |
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return IOS_UNSUPPORTED_CASE; |
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if (errno == EINTR) |
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return IOS_INTERRUPTED; |
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JNU_ThrowIOExceptionWithLastError(env, "Transfer failed"); |
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return IOS_THROWN; |
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} |
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|
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return result; |
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|
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#elif defined(_AIX) |
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jlong max = (jlong)java_lang_Integer_MAX_VALUE; |
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struct sf_parms sf_iobuf; |
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jlong result; |
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|
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if (position > max) |
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return IOS_UNSUPPORTED_CASE; |
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|
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if (count > max) |
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count = max; |
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|
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memset(&sf_iobuf, 0, sizeof(sf_iobuf)); |
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sf_iobuf.file_descriptor = srcFD; |
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sf_iobuf.file_offset = (off_t)position; |
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sf_iobuf.file_bytes = count; |
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|
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result = send_file(&dstFD, &sf_iobuf, SF_SYNC_CACHE); |
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|
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/* AIX send_file() will return 0 when this operation complete successfully, |
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* return 1 when partial bytes transfered and return -1 when an error has |
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* Occured. |
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*/ |
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if (result == -1) { |
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if (errno == EWOULDBLOCK) |
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return IOS_UNAVAILABLE; |
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if ((errno == EINVAL) && ((ssize_t)count >= 0)) |
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return IOS_UNSUPPORTED_CASE; |
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if (errno == EINTR) |
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return IOS_INTERRUPTED; |
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if (errno == ENOTSOCK) |
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return IOS_UNSUPPORTED; |
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JNU_ThrowIOExceptionWithLastError(env, "Transfer failed"); |
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return IOS_THROWN; |
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} |
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|
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if (sf_iobuf.bytes_sent > 0) |
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return (jlong)sf_iobuf.bytes_sent; |
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|
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return IOS_UNSUPPORTED_CASE; |
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#else |
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return IOS_UNSUPPORTED_CASE; |
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#endif |
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} |
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