--- /dev/null	2018-11-27 03:18:47.532777276 -0500
+++ new/src/jdk.net/linux/native/libextnet/RdmaNet.c	2018-11-30 08:33:08.964539384 -0500
@@ -0,0 +1,291 @@
+/*
+ * 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 "net_util.h"
+#include "nio.h"
+#include "nio_util.h"
+#include "rdma_util_md.h"
+#include "Rsocket.h"
+#include "sun_nio_ch_Net.h"
+
+static jfieldID fd_fdID;
+
+JNIEXPORT jboolean JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_isRdmaAvailable0(JNIEnv *env,
+        jclass clazz) {
+    return rdma_supported();
+}
+
+static int
+configureBlocking(int fd, jboolean blocking) {
+    int flags = rs_fcntl(fd, F_GETFL);
+    int newflags = blocking ? (flags & ~O_NONBLOCK) : (flags | O_NONBLOCK);
+
+    return (flags == newflags) ? 0 : rs_fcntl(fd, F_SETFL, newflags);
+}
+
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_configureBlocking(JNIEnv *env, jclass clazz,
+        jobject fdo, jboolean blocking) {
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if (configureBlocking(fd, blocking) < 0)
+        JNU_ThrowIOExceptionWithLastError(env, "Configure blocking failed");
+}
+
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_initIDs(JNIEnv *env, jclass clazz) {
+    loadRdmaFuncs(env);
+    CHECK_NULL(clazz = (*env)->FindClass(env, "java/io/FileDescriptor"));
+    CHECK_NULL(fd_fdID = (*env)->GetFieldID(env, clazz, "fd", "I"));
+    initInetAddressIDs(env);
+}
+
+JNIEXPORT jint JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_socket0(JNIEnv *env, jclass clazz,
+        jboolean preferIPv6, jboolean stream, jboolean reuse) {
+    int fd;
+    int type = (stream ? SOCK_STREAM : SOCK_DGRAM);
+    int domain = (ipv6_available() && preferIPv6) ? AF_INET6 : AF_INET;
+
+    fd = rs_socket(domain, type, 0);
+    if (fd < 0) {
+        return handleSocketError(env, errno);
+    }
+
+    if (reuse) {
+        int arg = 1;
+        if (rs_setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&arg,
+                       sizeof(arg)) < 0) {
+            JNU_ThrowByNameWithLastError(env,
+                    JNU_JAVANETPKG "SocketException",
+                    "Unable to set SO_REUSEADDR");
+            rs_close(fd);
+            return -1;
+        }
+    }
+    return fd;
+}
+
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_bind0(JNIEnv *env, jclass clazz,
+        jobject fdo, jboolean preferIPv6, jobject iao, int port) {
+    SOCKETADDRESS sa;
+    int sa_len = 0;
+    int rv = 0;
+
+    if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len,
+            preferIPv6) != 0) {
+        return;
+    }
+
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    rv = RDMA_Bind(fd, &sa, sa_len);
+    if (rv != 0) {
+        handleSocketError(env, errno);
+    }
+}
+
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_listen(JNIEnv *env, jclass clazz,
+        jobject fdo, jint backlog) {
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if (rs_listen(fd, backlog) < 0)
+       handleSocketError(env, errno);
+}
+
+JNIEXPORT jint JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_connect0(JNIEnv *env, jclass clazz,
+        jboolean preferIPv6, jobject fdo, jobject iao, jint port) {
+    SOCKETADDRESS sa;
+    int sa_len = 0;
+    int rv;
+
+    if (NET_InetAddressToSockaddr(env, iao, port, &sa, &sa_len,
+            preferIPv6) != 0) {
+        return IOS_THROWN;
+    }
+
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+
+    rv = rs_connect(fd, &sa.sa, sa_len);
+    if (rv != 0) {
+        if (errno == EINPROGRESS) {
+            return IOS_UNAVAILABLE;
+        } else if (errno == EINTR) {
+            return IOS_INTERRUPTED;
+        }
+        return handleSocketError(env, errno);
+    }
+    return 1;
+}
+
+JNIEXPORT jint JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_localPort(JNIEnv *env, jclass clazz,
+        jobject fdo) {
+    SOCKETADDRESS sa;
+    socklen_t sa_len = sizeof(SOCKETADDRESS);
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if (rs_getsockname(fd, &sa.sa, &sa_len) < 0) {
+        handleSocketError(env, errno);
+        return -1;
+    }
+    return NET_GetPortFromSockaddr(&sa);
+}
+
+JNIEXPORT jobject JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_localInetAddress(JNIEnv *env, jclass clazz,
+        jobject fdo) {
+    SOCKETADDRESS sa;
+    socklen_t sa_len = sizeof(SOCKETADDRESS);
+    int port;
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if (rs_getsockname(fd, &sa.sa, &sa_len) < 0) {
+        handleSocketError(env, errno);
+        return NULL;
+    }
+    return NET_SockaddrToInetAddress(env, &sa, &port);
+}
+
+JNIEXPORT jint JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_getIntOption0(JNIEnv *env, jclass clazz,
+        jobject fdo, jboolean mayNeedConversion, jint level, jint opt) {
+    int result;
+    struct linger linger;
+    u_char carg;
+    void *arg;
+    socklen_t arglen;
+    int n;
+
+    arg = (void *)&result;
+    arglen = sizeof(result);
+
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if (mayNeedConversion) {
+        n = RDMA_GetSockOpt(fd, level, opt, arg, (int*)&arglen);
+    } else {
+        n = rs_getsockopt(fd, level, opt, arg, &arglen);
+    }
+    if (n < 0) {
+        JNU_ThrowByNameWithLastError(env,
+                JNU_JAVANETPKG "SocketException",
+                "jdk.internal.net.rdma.RdmaNet.getIntOption");
+        return -1;
+    }
+    return (jint)result;
+}
+
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_setIntOption0(JNIEnv *env, jclass clazz,
+        jobject fdo, jboolean mayNeedConversion, jint level, jint opt,
+        jint arg) {
+    int result;
+    struct linger linger;
+    u_char carg;
+    void *parg;
+    socklen_t arglen;
+    int n;
+
+    parg = (void*)&arg;
+    arglen = sizeof(arg);
+
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if (mayNeedConversion) {
+        n = RDMA_SetSockOpt(fd, level, opt, parg, arglen);
+    } else {
+        n = rs_setsockopt(fd, level, opt, parg, arglen);
+    }
+    if (n < 0) {
+        JNU_ThrowByNameWithLastError(env,
+                JNU_JAVANETPKG "SocketException",
+                "jdk.internal.net.rdma.RdmaNet.setIntOption");
+    }
+}
+
+JNIEXPORT void JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_shutdown(JNIEnv *env, jclass clazz,
+        jobject fdo, jint jhow) {
+    int how = (jhow == sun_nio_ch_Net_SHUT_RD) ? SHUT_RD :
+        (jhow == sun_nio_ch_Net_SHUT_WR) ? SHUT_WR : SHUT_RDWR;
+    int fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    if ((rs_shutdown(fd, how) < 0) && (errno != ENOTCONN))
+        handleSocketError(env, errno);
+}
+
+JNIEXPORT jint JNICALL
+Java_jdk_internal_net_rdma_RdmaNet_poll(JNIEnv* env, jclass clazz,
+        jobject fdo, jint events, jlong timeout) {
+    struct pollfd pfd;
+    int rv;
+    pfd.fd = (*env)->GetIntField(env, fdo, fd_fdID);
+    pfd.events = events;
+    if (timeout < -1) {
+        timeout = -1;
+    } else if (timeout > INT_MAX) {
+        timeout = INT_MAX;
+    }
+    rv = rs_poll(&pfd, 1, (int)timeout);
+
+    if (rv >= 0) {
+        return pfd.revents;
+    } else if (errno == EINTR) {
+        // interrupted, no events to return
+        return 0;
+    } else {
+        handleSocketError(env, errno);
+        return IOS_THROWN;
+    }
+}
+
+jint handleSocketError(JNIEnv *env, jint errorValue) {
+    char *xn;
+    switch (errorValue) {
+        case EINPROGRESS:       /* Non-blocking connect */
+            return 0;
+#ifdef EPROTO
+        case EPROTO:
+            xn = JNU_JAVANETPKG "ProtocolException";
+            break;
+#endif
+        case ECONNREFUSED:
+        case ETIMEDOUT:
+        case ENOTCONN:
+            xn = JNU_JAVANETPKG "ConnectException";
+            break;
+
+        case EHOSTUNREACH:
+            xn = JNU_JAVANETPKG "NoRouteToHostException";
+            break;
+        case EADDRINUSE:  /* Fall through */
+        case EADDRNOTAVAIL:
+            xn = JNU_JAVANETPKG "BindException";
+            break;
+        default:
+            xn = JNU_JAVANETPKG "SocketException";
+            break;
+    }
+    errno = errorValue;
+    JNU_ThrowByNameWithLastError(env, xn, "NioSocketError");
+    return IOS_THROWN;
+}