--- /dev/null	2018-06-30 13:49:24.634979840 -0700
+++ new/src/jdk.net/linux/native/libextnet/LinuxRdmaSocketOptions.c	2018-06-30 14:07:22.227166940 -0700
@@ -0,0 +1,96 @@
+/*
+ * 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 "jdk_net_LinuxRdmaSocketOptions.h"
+#include "rdma_util_md.h"
+#include "jni_util.h"
+
+void throwByNameWithLastError
+  (JNIEnv *env, const char *name, const char *defaultDetail)
+{
+  char defaultMsg[255];
+  sprintf(defaultMsg, "errno: %d, %s", errno, defaultDetail);
+  JNU_ThrowByNameWithLastError(env, name, defaultMsg);
+}
+
+JNIEXPORT void JNICALL Java_jdk_net_LinuxRdmaSocketOptions_setSockOpt
+  (JNIEnv *env, jobject unused, jint fd, jint opt, jint value)
+{
+    int optname;
+    int level = SOL_RDMA;
+    RDMA_MapSocketOption(opt, &level, &optname);
+    int len = sizeof(value);
+    int rv = RDMA_SetSockOpt(fd, level, optname, (char*)&value, len);    
+    if (rv < 0) {
+        if (errno == ENOPROTOOPT) {
+            JNU_ThrowByName(env, "java/lang/UnsupportedOperationException",
+                            "unsupported RDMA socket option");
+        } else if (errno == EACCES || errno == EPERM) {
+            JNU_ThrowByName(env, "java/net/SocketException", "Permission denied");
+        } else {
+            throwByNameWithLastError(env, "java/net/SocketException",
+                                     "set RDMA option failed");
+        }
+    }
+}
+
+JNIEXPORT jint JNICALL Java_jdk_net_LinuxRdmaSocketOptions_getSockOpt
+  (JNIEnv *env, jobject unused, jint fd, jint opt)
+{
+    int optname;
+    int level = SOL_RDMA;
+    RDMA_MapSocketOption(opt, &level, &optname);
+    int value;
+    int len = sizeof(value);
+    int rv = RDMA_GetSockOpt(fd, level, optname, (char*)&value, &len);
+
+    if (rv < 0) {
+        if (errno == ENOPROTOOPT) {
+            JNU_ThrowByName(env, "java/lang/UnsupportedOperationException",
+                            "unsupported RDMA socket option");
+        } else if (errno == EACCES || errno == EPERM) {
+            JNU_ThrowByName(env, "java/net/SocketException", "Permission denied");
+        } else {
+            throwByNameWithLastError(env, "java/net/SocketException",
+                                     "get RDMA option failed");
+        }
+        return -1;
+    }
+    return value;
+}
+
+JNIEXPORT jboolean JNICALL Java_jdk_net_LinuxRdmaSocketOptions_rdmaSocketSupported
+  (JNIEnv *env, jobject unused)
+{
+    int rv, s;
+
+    s = rsocket(PF_INET, SOCK_STREAM, 0);
+    if (s < 0) {
+        return JNI_FALSE;
+    }
+    rclose(s);
+    return JNI_TRUE;
+}