1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 #include <errno.h> 26 #include <stdlib.h> 27 #include <string.h> 28 29 #include "net_util.h" 30 #include "rdma_util_md.h" 31 32 #include "rdma_ch_RdmaSocketOutputStream.h" 33 34 #define min(a, b) ((a) < (b) ? (a) : (b)) 35 36 static jfieldID IO_fd_fdID; 37 38 /* 39 * Class: jdk_net_SocketOutputStream 40 * Method: init 41 * Signature: ()V 42 */ 43 JNIEXPORT void JNICALL 44 Java_rdma_ch_RdmaSocketOutputStream_init(JNIEnv *env, jclass cls) { 45 IO_fd_fdID = NET_GetFileDescriptorID(env); 46 } 47 48 /* 49 * Class: jdk_net_RdmaSocketOutputStream 50 * Method: rdmaSocketWrite0 51 * Signature: (Ljava/io/FileDescriptor;[BII)V 52 */ 53 JNIEXPORT void JNICALL 54 Java_rdma_ch_RdmaSocketOutputStream_rdmaSocketWrite0(JNIEnv *env, jobject this, 55 jobject fdObj, 56 jbyteArray data, 57 jint off, jint len) { 58 char *bufP; 59 char BUF[MAX_BUFFER_LEN]; 60 int buflen; 61 int fd; 62 63 if (IS_NULL(fdObj)) { 64 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed"); 65 return; 66 } else { 67 fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID); 68 if (fd == -1) { 69 JNU_ThrowByName(env, "java/net/SocketException", "Socket closed"); 70 return; 71 } 72 73 } 74 75 if (len <= MAX_BUFFER_LEN) { 76 bufP = BUF; 77 buflen = MAX_BUFFER_LEN; 78 } else { 79 buflen = min(MAX_HEAP_BUFFER_LEN, len); 80 bufP = (char *)malloc((size_t)buflen); 81 82 if (bufP == NULL) { 83 bufP = BUF; 84 buflen = MAX_BUFFER_LEN; 85 } 86 } 87 88 while(len > 0) { 89 int loff = 0; 90 int chunkLen = min(buflen, len); 91 int llen = chunkLen; 92 (*env)->GetByteArrayRegion(env, data, off, chunkLen, (jbyte *)bufP); 93 94 if ((*env)->ExceptionCheck(env)) { 95 break; 96 } else { 97 while(llen > 0) { 98 int n = RDMA_Send(fd, bufP + loff, llen, 0); 99 if (n > 0) { 100 llen -= n; 101 loff += n; 102 continue; 103 } 104 if (errno == ECONNRESET) { 105 JNU_ThrowByName(env, "sun/net/ConnectionResetException", 106 "Connection reset"); 107 } else { 108 JNU_ThrowByNameWithMessageAndLastError 109 (env, "java/net/SocketException", "Write failed"); 110 } 111 if (bufP != BUF) { 112 free(bufP); 113 } 114 return; 115 } 116 len -= chunkLen; 117 off += chunkLen; 118 } 119 } 120 121 if (bufP != BUF) { 122 free(bufP); 123 } 124 }