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diff --git a/src/ceph/src/common/event_socket.h b/src/ceph/src/common/event_socket.h
new file mode 100644
index 0000000..79e8e15
--- /dev/null
+++ b/src/ceph/src/common/event_socket.h
@@ -0,0 +1,83 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2015 XSky <haomai@xsky.com>
+ *
+ * Author: Haomai Wang <haomaiwang@gmail.com>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#ifndef CEPH_COMMON_EVENT_SOCKET_H
+#define CEPH_COMMON_EVENT_SOCKET_H
+
+#include <unistd.h>
+#if defined(__FreeBSD__)
+#include <errno.h>
+#endif
+#include "include/event_type.h"
+
+class EventSocket {
+  int socket;
+  int type;
+
+ public:
+  EventSocket(): socket(-1), type(EVENT_SOCKET_TYPE_NONE) {}
+  bool is_valid() const { return socket != -1; }
+  int init(int fd, int t) {
+    switch (t) {
+      case EVENT_SOCKET_TYPE_PIPE:
+#ifdef HAVE_EVENTFD
+      case EVENT_SOCKET_TYPE_EVENTFD:
+#endif
+      {
+        socket = fd;
+        type = t;
+        return 0;
+      }
+    }
+    return -EINVAL;
+  }
+  int notify() {
+    int ret;
+    switch (type) {
+      case EVENT_SOCKET_TYPE_PIPE:
+      {
+        char buf[1];
+        buf[0] = 'i';
+        ret = write(socket, buf, 1);
+        if (ret < 0)
+          ret = -errno;
+        else
+          ret = 0;
+        break;
+      }
+#ifdef HAVE_EVENTFD
+      case EVENT_SOCKET_TYPE_EVENTFD:
+      {
+        uint64_t value = 1;
+        ret = write(socket, &value, sizeof (value));
+        if (ret < 0)
+          ret = -errno;
+        else
+          ret = 0;
+        break;
+      }
+#endif
+      default:
+      {
+        ret = -1;
+        break;
+      }
+    }
+    return ret;
+  }
+};
+
+#endif