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diff --git a/src/ceph/src/test/libcephfs/multiclient.cc b/src/ceph/src/test/libcephfs/multiclient.cc
new file mode 100644
index 0000000..179109d
--- /dev/null
+++ b/src/ceph/src/test/libcephfs/multiclient.cc
@@ -0,0 +1,97 @@
+// -*- 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) 2011 New Dream Network
+ *
+ * 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.
+ *
+ */
+
+#include "gtest/gtest.h"
+#include "include/cephfs/libcephfs.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <sys/xattr.h>
+
+TEST(LibCephFS, MulticlientSimple) {
+  struct ceph_mount_info *ca, *cb;
+  ASSERT_EQ(ceph_create(&ca, NULL), 0);
+  ASSERT_EQ(ceph_conf_read_file(ca, NULL), 0);
+  ASSERT_EQ(0, ceph_conf_parse_env(ca, NULL));
+  ASSERT_EQ(ceph_mount(ca, NULL), 0);
+
+  ASSERT_EQ(ceph_create(&cb, NULL), 0);
+  ASSERT_EQ(ceph_conf_read_file(cb, NULL), 0);
+  ASSERT_EQ(0, ceph_conf_parse_env(cb, NULL));
+  ASSERT_EQ(ceph_mount(cb, NULL), 0);
+
+  char name[20];
+  snprintf(name, sizeof(name), "foo.%d", getpid());
+  int fda = ceph_open(ca, name, O_CREAT|O_RDWR, 0644);
+  ASSERT_LE(0, fda);
+  int fdb = ceph_open(cb, name, O_CREAT|O_RDWR, 0644);
+  ASSERT_LE(0, fdb);
+
+  char bufa[4] = "foo";
+  char bufb[4];
+
+  for (int i=0; i<10; i++) {
+    strcpy(bufa, "foo");
+    ASSERT_EQ((int)sizeof(bufa), ceph_write(ca, fda, bufa, sizeof(bufa), i*6));
+    ASSERT_EQ((int)sizeof(bufa), ceph_read(cb, fdb, bufb, sizeof(bufa), i*6));
+    ASSERT_EQ(0, memcmp(bufa, bufb, sizeof(bufa)));
+    strcpy(bufb, "bar");
+    ASSERT_EQ((int)sizeof(bufb), ceph_write(cb, fdb, bufb, sizeof(bufb), i*6+3));
+    ASSERT_EQ((int)sizeof(bufb), ceph_read(ca, fda, bufa, sizeof(bufb), i*6+3));
+    ASSERT_EQ(0, memcmp(bufa, bufb, sizeof(bufa)));
+  }
+
+  ceph_close(ca, fda);
+  ceph_close(cb, fdb);
+
+  ceph_shutdown(ca);
+  ceph_shutdown(cb);
+}
+
+TEST(LibCephFS, MulticlientHoleEOF) {
+  struct ceph_mount_info *ca, *cb;
+  ASSERT_EQ(ceph_create(&ca, NULL), 0);
+  ASSERT_EQ(ceph_conf_read_file(ca, NULL), 0);
+  ASSERT_EQ(0, ceph_conf_parse_env(ca, NULL));
+  ASSERT_EQ(ceph_mount(ca, NULL), 0);
+
+  ASSERT_EQ(ceph_create(&cb, NULL), 0);
+  ASSERT_EQ(ceph_conf_read_file(cb, NULL), 0);
+  ASSERT_EQ(0, ceph_conf_parse_env(cb, NULL));
+  ASSERT_EQ(ceph_mount(cb, NULL), 0);
+
+  char name[20];
+  snprintf(name, sizeof(name), "foo.%d", getpid());
+  int fda = ceph_open(ca, name, O_CREAT|O_RDWR, 0644);
+  ASSERT_LE(0, fda);
+  int fdb = ceph_open(cb, name, O_CREAT|O_RDWR, 0644);
+  ASSERT_LE(0, fdb);
+
+  ASSERT_EQ(3, ceph_write(ca, fda, "foo", 3, 0));
+  ASSERT_EQ(0, ceph_ftruncate(ca, fda, 1000000));
+
+  char buf[4];
+  ASSERT_EQ(2, ceph_read(cb, fdb, buf, sizeof(buf), 1000000-2));
+  ASSERT_EQ(0, buf[0]);
+  ASSERT_EQ(0, buf[1]);
+
+  ceph_close(ca, fda);
+  ceph_close(cb, fdb);
+
+  ceph_shutdown(ca);
+  ceph_shutdown(cb);
+}