--- /dev/null	2018-09-16 08:14:05.604314476 -0700
+++ new/src/jdk.net/linux/native/libextnet/RdmaSocketOutputStream.c	2018-10-05 14:14:56.731757189 -0700
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2018, 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 <stdlib.h>
+#include "net_util.h"
+#include "rdma_util_md.h"
+#include "jdk_internal_net_rdma_RdmaSocketOutputStream.h"
+
+#define min(a, b)       ((a) < (b) ? (a) : (b))
+
+static jfieldID IO_fd_fdID;
+
+/*
+ * Class:     jdk_net_SocketOutputStream
+ * Method:    init
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaSocketOutputStream_init(JNIEnv *env, jclass cls) {
+    IO_fd_fdID = NET_GetFileDescriptorID(env);
+}
+
+/*
+ * Class:     jdk_net_RdmaSocketOutputStream
+ * Method:    rdmaSocketWrite0
+ * Signature: (Ljava/io/FileDescriptor;[BII)V
+ */
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaSocketOutputStream_rdmaSocketWrite0(JNIEnv *env, jobject this,
+                                              jobject fdObj,
+                                              jbyteArray data,
+                                              jint off, jint len) {
+    char *bufP;
+    char BUF[MAX_BUFFER_LEN];
+    int buflen;
+    int fd;
+
+    if (IS_NULL(fdObj)) {
+        JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
+        return;
+    } else {
+        fd = (*env)->GetIntField(env, fdObj, IO_fd_fdID);
+        if (fd == -1) {
+            JNU_ThrowByName(env, "java/net/SocketException", "Socket closed");
+            return;
+        }
+
+    }
+
+    if (len <= MAX_BUFFER_LEN) {
+        bufP = BUF;
+        buflen = MAX_BUFFER_LEN;
+    } else {
+        buflen = min(MAX_HEAP_BUFFER_LEN, len);
+        bufP = (char *)malloc((size_t)buflen);
+
+        if (bufP == NULL) {
+            bufP = BUF;
+            buflen = MAX_BUFFER_LEN;
+        }
+    }
+
+    while(len > 0) {
+        int loff = 0;
+        int chunkLen = min(buflen, len);
+        int llen = chunkLen;
+        (*env)->GetByteArrayRegion(env, data, off, chunkLen, (jbyte *)bufP);
+
+        if ((*env)->ExceptionCheck(env)) {
+            break;
+        } else {
+            while(llen > 0) {
+                int n = RDMA_Send(fd, bufP + loff, llen, 0);
+                if (n > 0) {
+                    llen -= n;
+                    loff += n;
+                    continue;
+                }
+                if (errno == ECONNRESET) {
+                    JNU_ThrowByName(env, "sun/net/ConnectionResetException",
+                        "Connection reset");
+                } else {
+                    JNU_ThrowByNameWithMessageAndLastError
+                        (env, "java/net/SocketException", "Write failed");
+                }
+                if (bufP != BUF) {
+                    free(bufP);
+                }
+                return;
+            }
+            len -= chunkLen;
+            off += chunkLen;
+        }
+    }
+
+    if (bufP != BUF) {
+        free(bufP);
+    }
+}