feature: Add packet trace API

Also spiffed up the vpp_api_test plugin loader so it executes
VLIB_INIT_FUNCTIONs and VLIB_API_INIT_FUNCTIONs.

Type: feature

Change-Id: Id9a4f455d73738c41bcfea220df2112bb9679681
Signed-off-by: Jon Loeliger <jdl@netgate.com>
Signed-off-by: Ole Troan <ot@cisco.com>
Signed-off-by: Dave Barach <dave@barachs.net>

1 files changed, 148 insertions, 0 deletions

diff --git a/src/plugins/tracedump/graph_cli.c b/src/plugins/tracedump/graph_cli.c
new file mode 100644
index 00000000000..2440295a1a7
--- /dev/null
+++ b/src/plugins/tracedump/graph_cli.c
@@ -0,0 +1,148 @@
+/* Hey Emacs use -*- mode: C -*- */
+/*
+ * Copyright 2020 Rubicon Communications, LLC.
+ *
+ * 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 <sys/socket.h>
+#include <linux/if.h>
+
+#include <vnet/vnet.h>
+#include <vnet/plugin/plugin.h>
+
+#include <vlibapi/api.h>
+#include <vlibmemory/api.h>
+#include <vpp/app/version.h>
+#include <vnet/format_fns.h>
+
+#include <tracedump/graph.h>
+#include <tracedump/graph.api_enum.h>
+#include <tracedump/graph.api_types.h>
+
+static void graph_node_print (vlib_main_t *vm, vlib_node_t *n, bool want_arcs)
+{
+  vlib_cli_output (vm, "Node (%4d): %v, Flags: 0x%x\n",
+		   n->index, n->name, n->flags);
+  if (!want_arcs)
+    return;
+
+  int i;
+  int n_arcs = vec_len (n->next_nodes);
+  for (i = 0; i < n_arcs; ++i)
+    {
+      vlib_cli_output (vm, "    next: %d\n", n->next_nodes[i]);
+    }
+}
+
+
+static int
+node_cmp (void *a1, void *a2)
+{
+  vlib_node_t **n1 = a1;
+  vlib_node_t **n2 = a2;
+
+  return vec_cmp (n1[0]->name, n2[0]->name);
+}
+
+static clib_error_t *
+graph_node_show_cmd (vlib_main_t * vm,
+		     unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vlib_node_main_t *nm = &vm->node_main;
+  vlib_node_t *n;
+  u32 index;
+  u8 *name;
+  u32 flags;
+  bool want_arcs;
+
+  index = ~0;
+  name = 0;
+  flags = 0;
+  want_arcs = false;
+  n = 0;
+
+  while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (input, "node %d", &index))
+	  n = vlib_get_node (vm, index);
+      else if (unformat (input, "node %v", &name))
+	  n = vlib_get_node_by_name (vm, name);
+
+      else if (unformat (input, "want_arcs"))
+	want_arcs = true;
+
+      else if (unformat (input, "trace_supported"))
+	flags |= NODE_FLAG_TRACE_SUPPORTED;
+      else if (unformat (input, "input"))
+	flags |= NODE_FLAG_TRACE_SUPPORTED;
+      else if (unformat (input, "drop"))
+	flags |= NODE_FLAG_IS_DROP;
+      else if (unformat (input, "output"))
+	flags |= NODE_FLAG_IS_OUTPUT;
+      else if (unformat (input, "punt"))
+	flags |= NODE_FLAG_IS_PUNT;
+      else if (unformat (input, "handoff"))
+	flags |= NODE_FLAG_IS_HANDOFF;
+      else if (unformat (input, "no_free"))
+	flags |= NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH;
+      else if (unformat (input, "polling"))
+	flags |= NODE_FLAG_SWITCH_FROM_INTERRUPT_TO_POLLING_MODE;
+      else if (unformat (input, "interrupt"))
+	flags |= NODE_FLAG_SWITCH_FROM_POLLING_TO_INTERRUPT_MODE;
+
+      else
+	return clib_error_return (0, "unknown input '%U'",
+				  format_unformat_error, input);
+    }
+
+  /*
+   * Just one node requested?  Ignore flags.
+   */
+  if (n) {
+    graph_node_print (vm, n, want_arcs);
+    return 0;
+  }
+
+  vlib_node_t **nodes = vec_dup (nm->nodes);
+  uword i;
+
+  vec_sort_with_function (nodes, node_cmp);
+
+  for (i = 0; i < vec_len (nodes); ++i)
+    {
+      if (flags == 0 || (flags & nodes[i]->flags))
+	{
+	  graph_node_print (vm, nodes[i], want_arcs);
+	}
+    }
+
+  vec_free (nodes);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (graph_node_show_command, static) = {
+  .path = "show graph",
+  .short_help = "show graph [node <index>|<name>] [want_arcs] [input|trace_supported] [drop] [output] [punt] [handoff] [no_free] [polling] [interrupt]",
+  .function = graph_node_show_cmd,
+};
+/* *INDENT-ON* */
+
+
+/*
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */