2 * drop.c - Punt and drop nodes
4 * Copyright (c) 2015 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #include <vlib/vlib.h>
22 ERROR_DISPOSITION_DROP,
23 ERROR_DISPOSITION_PUNT,
25 } error_disposition_t;
28 validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index)
30 uword node_index = vlib_error_get_node (e[0]);
31 uword code = vlib_error_get_code (e[0]);
34 if (node_index >= vec_len (vm->node_main.nodes))
35 return format (0, "[%d], node index out of range 0x%x, error 0x%x",
36 index, node_index, e[0]);
38 n = vlib_get_node (vm, node_index);
39 if (code >= n->n_errors)
40 return format (0, "[%d], code %d out of range for node %v",
41 index, code, n->name);
47 validate_error_frame (vlib_main_t * vm,
48 vlib_node_runtime_t * node, vlib_frame_t * f)
50 u32 *buffers = vlib_frame_vector_args (f);
55 for (i = 0; i < f->n_vectors; i++)
57 b = vlib_get_buffer (vm, buffers[i]);
58 msg = validate_error (vm, &b->error, i);
67 counter_index (vlib_main_t * vm, vlib_error_t e)
72 ni = vlib_error_get_node (e);
73 n = vlib_get_node (vm, ni);
75 ci = vlib_error_get_code (e);
76 ASSERT (ci < n->n_errors);
78 ci += n->error_heap_index;
84 format_error_trace (u8 * s, va_list * va)
86 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
87 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
88 vlib_error_t *e = va_arg (*va, vlib_error_t *);
89 vlib_node_t *error_node;
90 vlib_error_main_t *em = &vm->error_main;
93 error_node = vlib_get_node (vm, vlib_error_get_node (e[0]));
94 i = counter_index (vm, e[0]);
95 s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]);
101 trace_errors (vlib_main_t * vm,
102 vlib_node_runtime_t * node, vlib_frame_t * frame)
104 u32 n_left, *buffers;
106 buffers = vlib_frame_vector_args (frame);
107 n_left = frame->n_vectors;
112 vlib_buffer_t *b0, *b1;
113 vlib_error_t *t0, *t1;
115 /* Prefetch next iteration. */
116 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
117 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
122 b0 = vlib_get_buffer (vm, bi0);
123 b1 = vlib_get_buffer (vm, bi1);
125 if (b0->flags & VLIB_BUFFER_IS_TRACED)
127 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
130 if (b1->flags & VLIB_BUFFER_IS_TRACED)
132 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
147 b0 = vlib_get_buffer (vm, bi0);
149 if (b0->flags & VLIB_BUFFER_IS_TRACED)
151 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
159 static_always_inline uword
160 process_drop_punt (vlib_main_t * vm,
161 vlib_node_runtime_t * node,
162 vlib_frame_t * frame, error_disposition_t disposition)
164 u32 errors[VLIB_FRAME_SIZE], *error, *from, n_left;
165 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
166 vlib_error_main_t *em = &vm->error_main;
168 from = vlib_frame_vector_args (frame);
169 n_left = frame->n_vectors;
173 vlib_get_buffers (vm, from, bufs, n_left);
175 if (node->flags & VLIB_NODE_FLAG_TRACE)
176 trace_errors (vm, node, frame);
178 /* collect the array of error first ... */
183 /* Prefetch 8 ahead - there's not much going on in each iteration */
184 vlib_prefetch_buffer_header (b[4], LOAD);
185 vlib_prefetch_buffer_header (b[5], LOAD);
186 vlib_prefetch_buffer_header (b[6], LOAD);
187 vlib_prefetch_buffer_header (b[7], LOAD);
189 error[0] = b[0]->error;
190 error[1] = b[1]->error;
191 error[2] = b[2]->error;
192 error[3] = b[3]->error;
200 error[0] = b[0]->error;
207 /* ... then count against them in blocks */
208 n_left = frame->n_vectors;
215 off = frame->n_vectors - n_left;
217 error = errors + off;
219 count = clib_count_equal_u32 (error, n_left);
222 c_index = counter_index (vm, error[0]);
223 em->counters[c_index] += count;
225 vlib_error_elog_count (vm, c_index, count);
228 if (disposition == ERROR_DISPOSITION_DROP || !vm->os_punt_frame)
230 vlib_buffer_free (vm, from, frame->n_vectors);
232 /* If there is no punt function, free the frame as well. */
233 if (disposition == ERROR_DISPOSITION_PUNT && !vm->os_punt_frame)
234 vlib_frame_free (vm, node, frame);
237 vm->os_punt_frame (vm, node, frame);
239 return frame->n_vectors;
242 VLIB_NODE_FN (error_drop_node) (vlib_main_t * vm,
243 vlib_node_runtime_t * node,
244 vlib_frame_t * frame)
246 return process_drop_punt (vm, node, frame, ERROR_DISPOSITION_DROP);
249 VLIB_NODE_FN (error_punt_node) (vlib_main_t * vm,
250 vlib_node_runtime_t * node,
251 vlib_frame_t * frame)
253 return process_drop_punt (vm, node, frame, ERROR_DISPOSITION_PUNT);
257 VLIB_REGISTER_NODE (error_drop_node) = {
259 .flags = VLIB_NODE_FLAG_IS_DROP,
260 .vector_size = sizeof (u32),
261 .format_trace = format_error_trace,
262 .validate_frame = validate_error_frame,
267 VLIB_REGISTER_NODE (error_punt_node) = {
269 .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH
270 | VLIB_NODE_FLAG_IS_PUNT),
271 .vector_size = sizeof (u32),
272 .format_trace = format_error_trace,
273 .validate_frame = validate_error_frame,
278 * fd.io coding-style-patch-verification: ON
281 * eval: (c-set-style "gnu")