1 files changed, 75 insertions, 0 deletions
diff --git a/tests/cc/test_shared_table.cc b/tests/cc/test_shared_table.cc
new file mode 100644
index 00000000..a638cb50
--- /dev/null
+++ b/tests/cc/test_shared_table.cc
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2018 Politecnico di Torino
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "BPF.h"
+#include "catch.hpp"
+
+const std::string BPF_PROGRAM1 = R"(
+BPF_TABLE_SHARED("array", int, int, mysharedtable, 1024);
+)";
+
+const std::string BPF_PROGRAM2 = R"(
+BPF_TABLE("extern", int, int, mysharedtable, 1024);
+)";
+
+TEST_CASE("test shared table", "[shared_table]") {
+  // deploy 4 ebpf programs: _ns1_a and _ns1_b are in ns1, _ns2_a and _ns2_b in ns2
+  ebpf::BPF bpf_ns1_a(0, nullptr, false, "ns1");
+  ebpf::BPF bpf_ns1_b(0, nullptr, false, "ns1");
+  ebpf::BPF bpf_ns2_a(0, nullptr, false, "ns2");
+  ebpf::BPF bpf_ns2_b(0, nullptr, false, "ns2");
+
+  ebpf::StatusTuple res(0);
+
+  res = bpf_ns1_a.init(BPF_PROGRAM1);
+  REQUIRE(res.code() == 0);
+
+  res = bpf_ns1_b.init(BPF_PROGRAM2);
+  REQUIRE(res.code() == 0);
+
+  res = bpf_ns2_a.init(BPF_PROGRAM1);
+  REQUIRE(res.code() == 0);
+
+  res = bpf_ns2_b.init(BPF_PROGRAM2);
+  REQUIRE(res.code() == 0);
+
+  // get references to all tables
+  ebpf::BPFArrayTable<int> t_ns1_a = bpf_ns1_a.get_array_table<int>("mysharedtable");
+  ebpf::BPFArrayTable<int> t_ns1_b = bpf_ns1_b.get_array_table<int>("mysharedtable");
+  ebpf::BPFArrayTable<int> t_ns2_a = bpf_ns2_a.get_array_table<int>("mysharedtable");
+  ebpf::BPFArrayTable<int> t_ns2_b = bpf_ns2_b.get_array_table<int>("mysharedtable");
+
+  // test that tables within the same ns are shared
+  int v1, v2, v3;
+  res = t_ns1_a.update_value(13, 42);
+  REQUIRE(res.code() == 0);
+
+  res = t_ns1_b.get_value(13, v1);
+  REQUIRE(res.code() == 0);
+  REQUIRE(v1 == 42);
+
+  // test that tables are isolated within different ns
+  res = t_ns2_a.update_value(13, 69);
+  REQUIRE(res.code() == 0);
+
+  res = t_ns2_b.get_value(13, v2);
+  REQUIRE(res.code() == 0);
+  REQUIRE(v2 == 69);
+
+  res = t_ns1_b.get_value(13, v3);
+  REQUIRE(res.code() == 0);
+  REQUIRE(v3 == 42);  // value should still be 42
+}