span: add feature (rx only) (VPP-185)

[vpp.git] / vnet / vnet / span / span.c

diff --git a/vnet/vnet/span/span.c b/vnet/vnet/span/span.c
new file mode 100644 (file)
index 0000000..de43af0
--- /dev/null
+++ b/vnet/vnet/span/span.c
@@ -0,0 +1,139 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ * 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 <vlib/vlib.h>
+#include <vppinfra/error.h>
+#include <vnet/feature/feature.h>
+
+#include <vnet/span/span.h>
+
+int
+span_add_delete_entry (vlib_main_t * vm,
+                      u32 src_sw_if_index, u32 dst_sw_if_index, u8 is_add)
+{
+  span_main_t *sm = &span_main;
+
+  if ((src_sw_if_index == ~0) || (dst_sw_if_index == ~0 && is_add)
+      || (src_sw_if_index == dst_sw_if_index))
+    return VNET_API_ERROR_INVALID_INTERFACE;
+
+  vnet_sw_interface_t *sw =
+    vnet_get_sw_interface (sm->vnet_main, src_sw_if_index);
+
+  vec_validate_aligned (sm->dst_by_src_sw_if_index, sw->hw_if_index,
+                       CLIB_CACHE_LINE_BYTES);
+  sm->dst_by_src_sw_if_index[sw->hw_if_index] = is_add ? dst_sw_if_index : 0;
+  vnet_feature_enable_disable ("device-input", "span-input",
+                              sw->hw_if_index, is_add, 0, 0);
+  return 0;
+}
+
+static clib_error_t *
+set_interface_span_command_fn (vlib_main_t * vm,
+                              unformat_input_t * input,
+                              vlib_cli_command_t * cmd)
+{
+  span_main_t *sm = &span_main;
+  u32 src_sw_if_index = ~0;
+  u32 dst_sw_if_index = ~0;
+  u8 is_add = 1;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "%U", unformat_vnet_sw_interface,
+                   sm->vnet_main, &src_sw_if_index))
+       ;
+      else if (unformat (input, "destination %U", unformat_vnet_sw_interface,
+                        sm->vnet_main, &dst_sw_if_index))
+       ;
+      else if (unformat (input, "disable"))
+       is_add = 0;
+      else
+       break;
+    }
+
+  int rv =
+    span_add_delete_entry (vm, src_sw_if_index, dst_sw_if_index, is_add);
+  if (rv == VNET_API_ERROR_INVALID_INTERFACE)
+    return clib_error_return (0, "Invalid interface");
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (set_interface_span_command, static) = {
+  .path = "set interface span",
+  .short_help = "set interface span <if-name> [disable | destination <if-name>]",
+  .function = set_interface_span_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+show_interfaces_span_command_fn (vlib_main_t * vm,
+                                unformat_input_t * input,
+                                vlib_cli_command_t * cmd)
+{
+
+  span_main_t *sm = &span_main;
+  vnet_main_t *vnm = &vnet_main;
+  u32 src_sw_if_index = 0, *dst_sw_if_index;
+  u8 header = 1;
+
+  vec_foreach (dst_sw_if_index, sm->dst_by_src_sw_if_index)
+  {
+    if (*dst_sw_if_index > 0)  // && *dst_sw_if_index != ~0)
+      {
+       if (header)
+         {
+           vlib_cli_output (vm,
+                            "SPAN source interface to destination interface table");
+           header = 0;
+         }
+       vlib_cli_output (vm, "%32U => %-32U",
+                        format_vnet_sw_if_index_name, vnm, src_sw_if_index,
+                        format_vnet_sw_if_index_name, vnm, *dst_sw_if_index);
+      }
+    src_sw_if_index++;
+  }
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (show_interfaces_span_command, static) = {
+  .path = "show interfaces span",
+  .short_help = "Shows SPAN mirror table",
+  .function = show_interfaces_span_command_fn,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+span_init (vlib_main_t * vm)
+{
+  span_main_t *sm = &span_main;
+
+  sm->vlib_main = vm;
+  sm->vnet_main = vnet_get_main ();
+
+  return 0;
+}
+
+VLIB_INIT_FUNCTION (span_init);
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */