1 files changed, 127 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp_debug.c b/src/vnet/tcp/tcp_debug.c
new file mode 100644
index 00000000000..cf61d226c7f
--- /dev/null
+++ b/src/vnet/tcp/tcp_debug.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2019 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 <vnet/tcp/tcp_debug.h>
+
+tcp_dbg_main_t tcp_dbg_main;
+
+void
+tcp_evt_track_register (elog_track_t * et)
+{
+  tcp_dbg_main_t *tdm = &tcp_dbg_main;
+  u32 fl_len, track_index;
+
+  fl_len = vec_len (tdm->free_track_indices);
+  if (fl_len)
+    {
+      track_index = tdm->free_track_indices[fl_len - 1];
+      _vec_len (tdm->free_track_indices) -= 1;
+      et->track_index_plus_one = track_index + 1;
+    }
+  else
+    elog_track_register (&vlib_global_main.elog_main, et);
+}
+
+static const char *tcp_evt_grp_str[] = {
+#define _(sym, str) str,
+  foreach_tcp_evt_grp
+#undef _
+};
+
+static void
+tcp_debug_show_groups (void)
+{
+  tcp_dbg_main_t *tdm = &tcp_dbg_main;
+  vlib_main_t *vm = vlib_get_main ();
+  int i = 0;
+
+  vlib_cli_output (vm, "%-10s%-30s%-10s", "Index", "Group", "Level");
+
+  for (i = 0; i < TCP_EVT_N_GRP; i++)
+    vlib_cli_output (vm, "%-10d%-30s%-10d", i, tcp_evt_grp_str[i],
+		     tdm->grp_dbg_lvl[i]);
+}
+
+static clib_error_t *
+tcp_debug_fn (vlib_main_t * vm, unformat_input_t * input,
+	      vlib_cli_command_t * cmd)
+{
+  unformat_input_t _line_input, *line_input = &_line_input;
+  tcp_dbg_main_t *tdm = &tcp_dbg_main;
+  u32 group = ~0, level = ~0;
+  clib_error_t *error = 0;
+  u8 is_show = 0;
+
+  if (!TCP_DEBUG_ALWAYS)
+    return clib_error_return (0, "must compile with TCP_DEBUG_ALWAYS set");
+
+  if (!unformat_user (input, unformat_line_input, line_input))
+    return clib_error_return (0, "expected enable | disable");
+
+  while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
+    {
+      if (unformat (line_input, "show"))
+	is_show = 1;
+      else if (unformat (line_input, "group %d", &group))
+	;
+      else if (unformat (line_input, "level %d", &level))
+	;
+      else
+	{
+	  error = clib_error_return (0, "unknown input `%U'",
+				     format_unformat_error, line_input);
+	  goto done;
+	}
+    }
+
+  if (is_show)
+    {
+      tcp_debug_show_groups ();
+      goto done;
+    }
+  if (group >= TCP_EVT_N_GRP)
+    {
+      error = clib_error_return (0, "group out of bounds");
+      goto done;
+    }
+  if (group == ~0 || level == ~0)
+    {
+      error = clib_error_return (0, "group and level must be set");
+      goto done;
+    }
+
+  tdm->grp_dbg_lvl[group] = level;
+
+done:
+
+  unformat_free (line_input);
+  return error;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (tcp_debug_command, static) =
+{
+  .path = "tcp debug",
+  .short_help = "tcp [show] [debug group <N> level <N>]",
+  .function = tcp_debug_fn,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */