Changes for supoprting iOAM/ NSH export. Add a separate node for POP only

handling to support iOAM export dynamic node.

Change-Id: I411ee93ea3ec34ed24c18c1ba4b5dc1c9533e483
Signed-off-by: Vengada <venggovi@cisco.com>

1 files changed, 155 insertions, 0 deletions

diff --git a/nsh-plugin/nsh-md2-ioam/export-nsh-md2-ioam/nsh_md2_ioam_node.c b/nsh-plugin/nsh-md2-ioam/export-nsh-md2-ioam/nsh_md2_ioam_node.c
new file mode 100644
index 0000000..fb76c60
--- /dev/null
+++ b/nsh-plugin/nsh-md2-ioam/export-nsh-md2-ioam/nsh_md2_ioam_node.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (c) 2017 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 <vnet/vnet.h>
+#include <vnet/pg/pg.h>
+#include <vppinfra/error.h>
+#include <vnet/ip/ip.h>
+#include <nsh/nsh.h>
+#include <nsh/nsh_packet.h>
+#include <ioam/export-common/ioam_export.h>
+
+typedef struct
+{
+  u32 next_index;
+  u32 flow_label;
+} export_trace_t;
+
+extern ioam_export_main_t nsh_md2_ioam_export_main;
+vlib_node_registration_t export_node;
+/* packet trace format function */
+static u8 *
+format_export_trace (u8 * s, va_list * args)
+{
+  CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+  CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+  export_trace_t *t = va_arg (*args, export_trace_t *);
+
+  s = format (s, "EXPORT: flow_label %d, next index %d",
+	      t->flow_label, t->next_index);
+  return s;
+}
+
+vlib_node_registration_t nsh_md2_ioam_export_node;
+
+#define foreach_export_error \
+_(RECORDED, "Packets recorded for export")
+
+typedef enum
+{
+#define _(sym,str) EXPORT_ERROR_##sym,
+  foreach_export_error
+#undef _
+    EXPORT_N_ERROR,
+} export_error_t;
+
+static char *export_error_strings[] = {
+#define _(sym,string) string,
+  foreach_export_error
+#undef _
+};
+
+typedef enum
+{
+  EXPORT_NEXT_NSH_MD2_IOAM_INPUT,
+  EXPORT_N_NEXT,
+} export_next_t;
+
+always_inline void
+copy3cachelines (void *dst, const void *src, size_t n)
+{
+
+  u64 *copy_dst, *copy_src;
+  int i;
+  copy_dst = (u64 *) dst;
+  copy_src = (u64 *) src;
+  if (PREDICT_FALSE (n < DEFAULT_EXPORT_SIZE))
+    {
+      for (i = 0; i < n / 64; i++)
+	{
+	  copy_dst[0] = copy_src[0];
+	  copy_dst[1] = copy_src[1];
+	  copy_dst[2] = copy_src[2];
+	  copy_dst[3] = copy_src[3];
+	  copy_dst[4] = copy_src[4];
+	  copy_dst[5] = copy_src[5];
+	  copy_dst[6] = copy_src[6];
+	  copy_dst[7] = copy_src[7];
+	  copy_dst += 8;
+	  copy_src += 8;
+	}
+      return;
+    }
+  for (i = 0; i < 3; i++)
+    {
+      copy_dst[0] = copy_src[0];
+      copy_dst[1] = copy_src[1];
+      copy_dst[2] = copy_src[2];
+      copy_dst[3] = copy_src[3];
+      copy_dst[4] = copy_src[4];
+      copy_dst[5] = copy_src[5];
+      copy_dst[6] = copy_src[6];
+      copy_dst[7] = copy_src[7];
+      copy_dst += 8;
+      copy_src += 8;
+    }
+}
+
+static void
+nsh_md2_ioam_export_fixup_func (vlib_buffer_t * export_buf,
+			     vlib_buffer_t * pak_buf)
+{
+  /* Todo: on implementing analyse */
+}
+
+static uword
+nsh_md2_ioam_export_node_fn (vlib_main_t * vm,
+			  vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  ioam_export_main_t *em = &nsh_md2_ioam_export_main;
+  ioam_export_node_common (em, vm, node, frame, ip4_header_t, length,
+			   ip_version_and_header_length,
+			   EXPORT_NEXT_NSH_MD2_IOAM_INPUT,
+			   nsh_md2_ioam_export_fixup_func);
+  return frame->n_vectors;
+}
+
+/*
+ * Node for iOAM export
+ */
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (nsh_md2_ioam_export_node) =
+{
+  .function = nsh_md2_ioam_export_node_fn,
+  .name = "nsh-md2-ioam-export",
+  .vector_size = sizeof (u32),
+  .format_trace = format_export_trace,
+  .type = VLIB_NODE_TYPE_INTERNAL,
+  .n_errors = ARRAY_LEN (export_error_strings),
+  .error_strings = export_error_strings,
+  .n_next_nodes = EXPORT_N_NEXT,
+    /* edit / add dispositions here */
+    .next_nodes =
+  {[EXPORT_NEXT_NSH_MD2_IOAM_INPUT] = "nsh-pop"},
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */