1 files changed, 338 insertions, 0 deletions

diff --git a/src/vlib/error.c b/src/vlib/error.c
new file mode 100644
index 00000000000..a2c2317686b
--- /dev/null
+++ b/src/vlib/error.c
@@ -0,0 +1,338 @@
+/*
+ * Copyright (c) 2015 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.
+ */
+/*
+ * error.c: VLIB error handler
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <vlib/vlib.h>
+#include <vppinfra/heap.h>
+
+uword
+vlib_error_drop_buffers (vlib_main_t * vm,
+			 vlib_node_runtime_t * node,
+			 u32 * buffers,
+			 u32 next_buffer_stride,
+			 u32 n_buffers,
+			 u32 next_index,
+			 u32 drop_error_node, u32 drop_error_code)
+{
+  u32 n_left_this_frame, n_buffers_left, *args, n_args_left;
+  vlib_error_t drop_error;
+
+  drop_error = vlib_error_set (drop_error_node, drop_error_code);
+
+  n_buffers_left = n_buffers;
+  while (n_buffers_left > 0)
+    {
+      vlib_get_next_frame (vm, node, next_index, args, n_args_left);
+
+      n_left_this_frame = clib_min (n_buffers_left, n_args_left);
+      n_buffers_left -= n_left_this_frame;
+      n_args_left -= n_left_this_frame;
+
+      while (n_left_this_frame >= 4)
+	{
+	  u32 bi0, bi1, bi2, bi3;
+	  vlib_buffer_t *b0, *b1, *b2, *b3;
+
+	  args[0] = bi0 = buffers[0];
+	  args[1] = bi1 = buffers[1];
+	  args[2] = bi2 = buffers[2];
+	  args[3] = bi3 = buffers[3];
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b1 = vlib_get_buffer (vm, bi1);
+	  b2 = vlib_get_buffer (vm, bi2);
+	  b3 = vlib_get_buffer (vm, bi3);
+
+	  b0->error = drop_error;
+	  b1->error = drop_error;
+	  b2->error = drop_error;
+	  b3->error = drop_error;
+
+	  buffers += 4;
+	  args += 4;
+	  n_left_this_frame -= 4;
+	}
+
+      while (n_left_this_frame >= 1)
+	{
+	  u32 bi0;
+	  vlib_buffer_t *b0;
+
+	  args[0] = bi0 = buffers[0];
+
+	  b0 = vlib_get_buffer (vm, bi0);
+	  b0->error = drop_error;
+
+	  buffers += 1;
+	  args += 1;
+	  n_left_this_frame -= 1;
+	}
+
+      vlib_put_next_frame (vm, node, next_index, n_args_left);
+    }
+
+  return n_buffers;
+}
+
+/* Convenience node to drop a vector of buffers with a "misc error". */
+static uword
+misc_drop_buffers (vlib_main_t * vm,
+		   vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+  return vlib_error_drop_buffers (vm, node, vlib_frame_args (frame),
+				  /* buffer stride */ 1,
+				  frame->n_vectors,
+				  /* next */ 0,
+				  node->node_index,
+				  /* error */ 0);
+}
+
+static char *misc_drop_buffers_error_strings[] = {
+  [0] = "misc. errors",
+};
+
+/* *INDENT-OFF* */
+VLIB_REGISTER_NODE (misc_drop_buffers_node,static) = {
+  .function = misc_drop_buffers,
+  .name = "misc-drop-buffers",
+  .vector_size = sizeof (u32),
+  .n_errors = 1,
+  .n_next_nodes = 1,
+  .next_nodes = {
+      "error-drop",
+  },
+  .error_strings = misc_drop_buffers_error_strings,
+};
+/* *INDENT-ON* */
+
+/* Reserves given number of error codes for given node. */
+void
+vlib_register_errors (vlib_main_t * vm,
+		      u32 node_index, u32 n_errors, char *error_strings[])
+{
+  vlib_error_main_t *em = &vm->error_main;
+  vlib_node_t *n = vlib_get_node (vm, node_index);
+  uword l;
+
+  ASSERT (os_get_cpu_number () == 0);
+
+  /* Free up any previous error strings. */
+  if (n->n_errors > 0)
+    heap_dealloc (em->error_strings_heap, n->error_heap_handle);
+
+  n->n_errors = n_errors;
+  n->error_strings = error_strings;
+
+  if (n_errors == 0)
+    return;
+
+  n->error_heap_index =
+    heap_alloc (em->error_strings_heap, n_errors, n->error_heap_handle);
+
+  l = vec_len (em->error_strings_heap);
+
+  clib_memcpy (vec_elt_at_index (em->error_strings_heap, n->error_heap_index),
+	       error_strings, n_errors * sizeof (error_strings[0]));
+
+  /* Allocate a counter/elog type for each error. */
+  vec_validate (em->counters, l - 1);
+  vec_validate (vm->error_elog_event_types, l - 1);
+
+  /* Zero counters for re-registrations of errors. */
+  if (n->error_heap_index + n_errors <= vec_len (em->counters_last_clear))
+    clib_memcpy (em->counters + n->error_heap_index,
+		 em->counters_last_clear + n->error_heap_index,
+		 n_errors * sizeof (em->counters[0]));
+  else
+    memset (em->counters + n->error_heap_index,
+	    0, n_errors * sizeof (em->counters[0]));
+
+  {
+    elog_event_type_t t;
+    uword i;
+
+    memset (&t, 0, sizeof (t));
+    for (i = 0; i < n_errors; i++)
+      {
+	t.format = (char *) format (0, "%v %s: %%d",
+				    n->name, error_strings[i]);
+	vm->error_elog_event_types[n->error_heap_index + i] = t;
+      }
+  }
+}
+
+static clib_error_t *
+show_errors (vlib_main_t * vm,
+	     unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vlib_error_main_t *em = &vm->error_main;
+  vlib_node_t *n;
+  u32 code, i, ni;
+  u64 c;
+  int index = 0;
+  int verbose = 0;
+  u64 *sums = 0;
+
+  if (unformat (input, "verbose %d", &verbose))
+    ;
+  else if (unformat (input, "verbose"))
+    verbose = 1;
+
+  vec_validate (sums, vec_len (em->counters));
+
+  if (verbose)
+    vlib_cli_output (vm, "%=10s%=40s%=20s%=6s", "Count", "Node", "Reason",
+		     "Index");
+  else
+    vlib_cli_output (vm, "%=10s%=40s%=6s", "Count", "Node", "Reason");
+
+
+  /* *INDENT-OFF* */
+  foreach_vlib_main(({
+    em = &this_vlib_main->error_main;
+
+    if (verbose)
+      vlib_cli_output(vm, "Thread %u (%v):", index,
+                      vlib_worker_threads[index].name);
+
+    for (ni = 0; ni < vec_len (this_vlib_main->node_main.nodes); ni++)
+      {
+	n = vlib_get_node (this_vlib_main, ni);
+	for (code = 0; code < n->n_errors; code++)
+	  {
+	    i = n->error_heap_index + code;
+	    c = em->counters[i];
+	    if (i < vec_len (em->counters_last_clear))
+	      c -= em->counters_last_clear[i];
+	    sums[i] += c;
+
+	    if (c == 0 && verbose < 2)
+	      continue;
+
+            if (verbose)
+              vlib_cli_output (vm, "%10Ld%=40v%=20s%=6d", c, n->name,
+                               em->error_strings_heap[i], i);
+            else
+              vlib_cli_output (vm, "%10d%=40v%s", c, n->name,
+                               em->error_strings_heap[i]);
+	  }
+      }
+    index++;
+  }));
+  /* *INDENT-ON* */
+
+  if (verbose)
+    vlib_cli_output (vm, "Total:");
+
+  for (ni = 0; ni < vec_len (vm->node_main.nodes); ni++)
+    {
+      n = vlib_get_node (vm, ni);
+      for (code = 0; code < n->n_errors; code++)
+	{
+	  i = n->error_heap_index + code;
+	  if (sums[i])
+	    {
+	      if (verbose)
+		vlib_cli_output (vm, "%10Ld%=40v%=20s%=10d", sums[i], n->name,
+				 em->error_strings_heap[i], i);
+	    }
+	}
+    }
+
+  vec_free (sums);
+
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_errors, static) = {
+  .path = "show errors",
+  .short_help = "Show error counts",
+  .function = show_errors,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_show_node_counters, static) = {
+  .path = "show node counters",
+  .short_help = "Show node counters",
+  .function = show_errors,
+};
+/* *INDENT-ON* */
+
+static clib_error_t *
+clear_error_counters (vlib_main_t * vm,
+		      unformat_input_t * input, vlib_cli_command_t * cmd)
+{
+  vlib_error_main_t *em;
+  u32 i;
+
+  /* *INDENT-OFF* */
+  foreach_vlib_main(({
+    em = &this_vlib_main->error_main;
+    vec_validate (em->counters_last_clear, vec_len (em->counters) - 1);
+    for (i = 0; i < vec_len (em->counters); i++)
+      em->counters_last_clear[i] = em->counters[i];
+  }));
+  /* *INDENT-ON* */
+  return 0;
+}
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_clear_error_counters, static) = {
+  .path = "clear errors",
+  .short_help = "Clear error counters",
+  .function = clear_error_counters,
+};
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (cli_clear_node_counters, static) = {
+  .path = "clear node counters",
+  .short_help = "Clear node counters",
+  .function = clear_error_counters,
+};
+/* *INDENT-ON* */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */