2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * interface_output.c: interface output node
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/feature/feature.h>
46 u8 data[128 - sizeof (u32)];
48 interface_output_trace_t;
51 format_vnet_interface_output_trace (u8 * s, va_list * va)
53 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
54 vlib_node_t *node = va_arg (*va, vlib_node_t *);
55 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
56 vnet_main_t *vnm = vnet_get_main ();
57 vnet_sw_interface_t *si;
60 if (t->sw_if_index != (u32) ~ 0)
62 indent = format_get_indent (s);
64 if (pool_is_free_index
65 (vnm->interface_main.sw_interfaces, t->sw_if_index))
67 /* the interface may have been deleted by the time the trace is printed */
68 s = format (s, "sw_if_index: %d\n%U%U",
70 format_white_space, indent,
71 node->format_buffer ? node->
72 format_buffer : format_hex_bytes, t->data,
77 si = vnet_get_sw_interface (vnm, t->sw_if_index);
79 s = format (s, "%U\n%U%U",
80 format_vnet_sw_interface_name, vnm, si,
81 format_white_space, indent,
82 node->format_buffer ? node->
83 format_buffer : format_hex_bytes, t->data,
91 vnet_interface_output_trace (vlib_main_t * vm,
92 vlib_node_runtime_t * node,
93 vlib_frame_t * frame, uword n_buffers)
98 from = vlib_frame_args (frame);
103 vlib_buffer_t *b0, *b1;
104 interface_output_trace_t *t0, *t1;
106 /* Prefetch next iteration. */
107 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
108 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
113 b0 = vlib_get_buffer (vm, bi0);
114 b1 = vlib_get_buffer (vm, bi1);
116 if (b0->flags & VLIB_BUFFER_IS_TRACED)
118 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
119 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
120 clib_memcpy (t0->data, vlib_buffer_get_current (b0),
123 if (b1->flags & VLIB_BUFFER_IS_TRACED)
125 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
126 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
127 clib_memcpy (t1->data, vlib_buffer_get_current (b1),
138 interface_output_trace_t *t0;
142 b0 = vlib_get_buffer (vm, bi0);
144 if (b0->flags & VLIB_BUFFER_IS_TRACED)
146 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
147 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
148 clib_memcpy (t0->data, vlib_buffer_get_current (b0),
156 static never_inline u32
157 slow_path (vlib_main_t * vm,
160 u32 n_left_to_tx, u32 * to_tx, u32 * n_slow_bytes_result)
162 /* We've already enqueued a single buffer. */
164 u32 n_slow_bytes = 0;
166 while (n_left_to_tx > 0)
172 n_slow_bytes += vlib_buffer_length_in_chain (vm, b);
174 /* Be grumpy about zero length buffers for benefit of
175 driver tx function. */
176 ASSERT (b->current_length > 0);
178 if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
182 b = vlib_get_buffer (vm, bi);
185 /* Ran out of space in next frame trying to enqueue buffers? */
186 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
189 *n_slow_bytes_result = n_slow_bytes;
194 * Increment TX stats. Roll up consecutive increments to the same sw_if_index
195 * into one increment.
197 static_always_inline void
198 incr_output_stats (vnet_main_t * vnm,
202 u32 * last_sw_if_index, u32 * n_packets, u32 * n_bytes)
204 vnet_interface_main_t *im;
206 if (PREDICT_TRUE (sw_if_index == *last_sw_if_index))
213 if (PREDICT_TRUE (*last_sw_if_index != ~0))
215 im = &vnm->interface_main;
217 vlib_increment_combined_counter (im->combined_sw_if_counters
218 + VNET_INTERFACE_COUNTER_TX,
221 *n_packets, *n_bytes);
223 *last_sw_if_index = sw_if_index;
230 /* Interface output functions. */
232 vnet_interface_output_node_flatten (vlib_main_t * vm,
233 vlib_node_runtime_t * node,
234 vlib_frame_t * frame)
236 vnet_main_t *vnm = vnet_get_main ();
237 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
238 vnet_sw_interface_t *si;
239 vnet_hw_interface_t *hi;
240 u32 n_left_to_tx, *from, *from_end, *to_tx;
241 u32 n_bytes, n_buffers, n_packets;
242 u32 last_sw_if_index;
243 u32 cpu_index = vm->cpu_index;
245 n_buffers = frame->n_vectors;
247 if (node->flags & VLIB_NODE_FLAG_TRACE)
248 vnet_interface_output_trace (vm, node, frame, n_buffers);
250 from = vlib_frame_args (frame);
253 return vlib_error_drop_buffers (vm, node, from,
254 /* buffer stride */ 1,
256 VNET_INTERFACE_OUTPUT_NEXT_DROP,
258 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
260 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
261 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
262 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
263 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
265 vlib_simple_counter_main_t *cm;
267 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
268 VNET_INTERFACE_COUNTER_TX_ERROR);
269 vlib_increment_simple_counter (cm, cpu_index,
270 rt->sw_if_index, n_buffers);
271 return vlib_error_drop_buffers (vm, node, from,
272 /* buffer stride */ 1,
274 VNET_INTERFACE_OUTPUT_NEXT_DROP,
276 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
279 from_end = from + n_buffers;
281 /* Total byte count of all buffers. */
284 last_sw_if_index = ~0;
286 while (from < from_end)
288 /* Get new next frame since previous incomplete frame may have less
289 than VNET_FRAME_SIZE vectors in it. */
290 vlib_get_new_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX,
291 to_tx, n_left_to_tx);
293 while (from + 4 <= from_end && n_left_to_tx >= 2)
296 vlib_buffer_t *b0, *b1;
298 /* Prefetch next iteration. */
299 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
300 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
310 b0 = vlib_get_buffer (vm, bi0);
311 b1 = vlib_get_buffer (vm, bi1);
313 /* Be grumpy about zero length buffers for benefit of
314 driver tx function. */
315 ASSERT (b0->current_length > 0);
316 ASSERT (b1->current_length > 0);
319 ((b0->flags | b1->flags) & VLIB_BUFFER_NEXT_PRESENT))
321 u32 n_buffers, n_slow_bytes, i;
328 /* Do slow path two times. */
329 for (i = 0; i < 2; i++)
331 u32 bi = i ? bi1 : bi0;
332 vlib_buffer_t *b = i ? b1 : b0;
334 n_buffers = slow_path (vm, bi, b,
335 n_left_to_tx, to_tx, &n_slow_bytes);
337 /* Not enough room for single packet? */
343 n_left_to_tx -= n_buffers;
344 incr_output_stats (vnm, cpu_index, n_slow_bytes,
345 vnet_buffer (b)->sw_if_index[VLIB_TX],
346 &last_sw_if_index, &n_packets, &n_bytes);
351 incr_output_stats (vnm, cpu_index,
352 vlib_buffer_length_in_chain (vm, b0),
353 vnet_buffer (b0)->sw_if_index[VLIB_TX],
354 &last_sw_if_index, &n_packets, &n_bytes);
355 incr_output_stats (vnm, cpu_index,
356 vlib_buffer_length_in_chain (vm, b0),
357 vnet_buffer (b1)->sw_if_index[VLIB_TX],
358 &last_sw_if_index, &n_packets, &n_bytes);
362 while (from + 1 <= from_end && n_left_to_tx >= 1)
373 b0 = vlib_get_buffer (vm, bi0);
375 /* Be grumpy about zero length buffers for benefit of
376 driver tx function. */
377 ASSERT (b0->current_length > 0);
379 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
381 u32 n_buffers, n_slow_bytes;
388 n_buffers = slow_path (vm, bi0, b0,
389 n_left_to_tx, to_tx, &n_slow_bytes);
391 /* Not enough room for single packet? */
397 n_left_to_tx -= n_buffers;
399 incr_output_stats (vnm, cpu_index,
400 vlib_buffer_length_in_chain (vm, b0),
401 vnet_buffer (b0)->sw_if_index[VLIB_TX],
402 &last_sw_if_index, &n_packets, &n_bytes);
406 vlib_put_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX,
410 /* Final update of interface stats. */
411 incr_output_stats (vnm, cpu_index, 0, ~0, /* ~0 will flush stats */
412 &last_sw_if_index, &n_packets, &n_bytes);
417 VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node_flatten);
418 CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node_flatten);
421 vnet_interface_output_node (vlib_main_t * vm,
422 vlib_node_runtime_t * node, vlib_frame_t * frame)
424 vnet_main_t *vnm = vnet_get_main ();
425 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
426 vnet_sw_interface_t *si;
427 vnet_hw_interface_t *hi;
428 u32 n_left_to_tx, *from, *from_end, *to_tx;
429 u32 n_bytes, n_buffers, n_packets;
430 u32 n_bytes_b0, n_bytes_b1;
431 u32 cpu_index = vm->cpu_index;
432 vnet_interface_main_t *im = &vnm->interface_main;
433 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
434 u32 current_config_index = ~0;
435 u8 arc = im->output_feature_arc_index;
437 n_buffers = frame->n_vectors;
439 if (node->flags & VLIB_NODE_FLAG_TRACE)
440 vnet_interface_output_trace (vm, node, frame, n_buffers);
442 from = vlib_frame_args (frame);
445 return vlib_error_drop_buffers (vm, node, from,
446 /* buffer stride */ 1,
448 VNET_INTERFACE_OUTPUT_NEXT_DROP,
450 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
452 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
453 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
454 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
455 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
457 vlib_simple_counter_main_t *cm;
459 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
460 VNET_INTERFACE_COUNTER_TX_ERROR);
461 vlib_increment_simple_counter (cm, cpu_index,
462 rt->sw_if_index, n_buffers);
464 return vlib_error_drop_buffers (vm, node, from,
465 /* buffer stride */ 1,
467 VNET_INTERFACE_OUTPUT_NEXT_DROP,
469 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
472 from_end = from + n_buffers;
474 /* Total byte count of all buffers. */
478 /* interface-output feature arc handling */
479 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
481 vnet_feature_config_main_t *fcm;
482 fcm = vnet_feature_get_config_main (arc);
483 current_config_index = vnet_get_feature_config_index (arc,
485 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
489 while (from < from_end)
491 /* Get new next frame since previous incomplete frame may have less
492 than VNET_FRAME_SIZE vectors in it. */
493 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
495 while (from + 4 <= from_end && n_left_to_tx >= 2)
498 vlib_buffer_t *b0, *b1;
499 u32 tx_swif0, tx_swif1;
501 /* Prefetch next iteration. */
502 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
503 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
513 b0 = vlib_get_buffer (vm, bi0);
514 b1 = vlib_get_buffer (vm, bi1);
516 /* Be grumpy about zero length buffers for benefit of
517 driver tx function. */
518 ASSERT (b0->current_length > 0);
519 ASSERT (b1->current_length > 0);
521 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
522 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1);
523 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
524 tx_swif1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
526 n_bytes += n_bytes_b0 + n_bytes_b1;
529 if (PREDICT_FALSE (current_config_index != ~0))
531 b0->feature_arc_index = arc;
532 b1->feature_arc_index = arc;
533 b0->current_config_index = current_config_index;
534 b1->current_config_index = current_config_index;
537 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
539 /* update vlan subif tx counts, if required */
540 vlib_increment_combined_counter (im->combined_sw_if_counters +
541 VNET_INTERFACE_COUNTER_TX,
542 cpu_index, tx_swif0, 1,
546 /* update vlan subif tx counts, if required */
547 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
550 vlib_increment_combined_counter (im->combined_sw_if_counters +
551 VNET_INTERFACE_COUNTER_TX,
552 cpu_index, tx_swif1, 1,
557 while (from + 1 <= from_end && n_left_to_tx >= 1)
569 b0 = vlib_get_buffer (vm, bi0);
571 /* Be grumpy about zero length buffers for benefit of
572 driver tx function. */
573 ASSERT (b0->current_length > 0);
575 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
576 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
577 n_bytes += n_bytes_b0;
580 if (PREDICT_FALSE (current_config_index != ~0))
582 b0->feature_arc_index = arc;
583 b0->current_config_index = current_config_index;
586 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
589 vlib_increment_combined_counter (im->combined_sw_if_counters +
590 VNET_INTERFACE_COUNTER_TX,
591 cpu_index, tx_swif0, 1,
596 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
599 /* Update main interface stats. */
600 vlib_increment_combined_counter (im->combined_sw_if_counters
601 + VNET_INTERFACE_COUNTER_TX,
603 rt->sw_if_index, n_packets, n_bytes);
607 VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node);
608 CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node);
610 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
612 vnet_per_buffer_interface_output (vlib_main_t * vm,
613 vlib_node_runtime_t * node,
614 vlib_frame_t * frame)
616 vnet_main_t *vnm = vnet_get_main ();
617 u32 n_left_to_next, *from, *to_next;
618 u32 n_left_from, next_index;
620 n_left_from = frame->n_vectors;
622 from = vlib_frame_args (frame);
623 next_index = node->cached_next_index;
625 while (n_left_from > 0)
627 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
629 while (n_left_from >= 4 && n_left_to_next >= 2)
631 u32 bi0, bi1, next0, next1;
632 vlib_buffer_t *b0, *b1;
633 vnet_hw_interface_t *hi0, *hi1;
635 /* Prefetch next iteration. */
636 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
637 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
648 b0 = vlib_get_buffer (vm, bi0);
649 b1 = vlib_get_buffer (vm, bi1);
652 vnet_get_sup_hw_interface (vnm,
653 vnet_buffer (b0)->sw_if_index
656 vnet_get_sup_hw_interface (vnm,
657 vnet_buffer (b1)->sw_if_index
660 next0 = hi0->hw_if_index;
661 next1 = hi1->hw_if_index;
663 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
664 n_left_to_next, bi0, bi1, next0,
668 while (n_left_from > 0 && n_left_to_next > 0)
672 vnet_hw_interface_t *hi0;
681 b0 = vlib_get_buffer (vm, bi0);
684 vnet_get_sup_hw_interface (vnm,
685 vnet_buffer (b0)->sw_if_index
688 next0 = hi0->hw_if_index;
690 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
691 n_left_to_next, bi0, next0);
694 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
697 return frame->n_vectors;
701 counter_index (vlib_main_t * vm, vlib_error_t e)
706 ni = vlib_error_get_node (e);
707 n = vlib_get_node (vm, ni);
709 ci = vlib_error_get_code (e);
710 ASSERT (ci < n->n_errors);
712 ci += n->error_heap_index;
718 format_vnet_error_trace (u8 * s, va_list * va)
720 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
721 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
722 vlib_error_t *e = va_arg (*va, vlib_error_t *);
723 vlib_node_t *error_node;
724 vlib_error_main_t *em = &vm->error_main;
727 error_node = vlib_get_node (vm, vlib_error_get_node (e[0]));
728 i = counter_index (vm, e[0]);
729 s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]);
735 trace_errors_with_buffers (vlib_main_t * vm,
736 vlib_node_runtime_t * node, vlib_frame_t * frame)
738 u32 n_left, *buffers;
740 buffers = vlib_frame_vector_args (frame);
741 n_left = frame->n_vectors;
746 vlib_buffer_t *b0, *b1;
747 vlib_error_t *t0, *t1;
749 /* Prefetch next iteration. */
750 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
751 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
756 b0 = vlib_get_buffer (vm, bi0);
757 b1 = vlib_get_buffer (vm, bi1);
759 if (b0->flags & VLIB_BUFFER_IS_TRACED)
761 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
764 if (b1->flags & VLIB_BUFFER_IS_TRACED)
766 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
781 b0 = vlib_get_buffer (vm, bi0);
783 if (b0->flags & VLIB_BUFFER_IS_TRACED)
785 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
794 validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index)
796 uword node_index = vlib_error_get_node (e[0]);
797 uword code = vlib_error_get_code (e[0]);
800 if (node_index >= vec_len (vm->node_main.nodes))
801 return format (0, "[%d], node index out of range 0x%x, error 0x%x",
802 index, node_index, e[0]);
804 n = vlib_get_node (vm, node_index);
805 if (code >= n->n_errors)
806 return format (0, "[%d], code %d out of range for node %v",
807 index, code, n->name);
813 validate_error_frame (vlib_main_t * vm,
814 vlib_node_runtime_t * node, vlib_frame_t * f)
816 u32 *buffers = vlib_frame_args (f);
821 for (i = 0; i < f->n_vectors; i++)
823 b = vlib_get_buffer (vm, buffers[i]);
824 msg = validate_error (vm, &b->error, i);
834 VNET_ERROR_DISPOSITION_DROP,
835 VNET_ERROR_DISPOSITION_PUNT,
836 VNET_ERROR_N_DISPOSITION,
837 } vnet_error_disposition_t;
840 do_packet (vlib_main_t * vm, vlib_error_t a)
842 vlib_error_main_t *em = &vm->error_main;
843 u32 i = counter_index (vm, a);
844 em->counters[i] += 1;
845 vlib_error_elog_count (vm, i, 1);
848 static_always_inline uword
849 process_drop_punt (vlib_main_t * vm,
850 vlib_node_runtime_t * node,
851 vlib_frame_t * frame, vnet_error_disposition_t disposition)
853 vnet_main_t *vnm = vnet_get_main ();
854 vlib_error_main_t *em = &vm->error_main;
855 u32 *buffers, *first_buffer;
856 vlib_error_t current_error;
857 u32 current_counter_index, n_errors_left;
858 u32 current_sw_if_index, n_errors_current_sw_if_index;
860 vlib_simple_counter_main_t *cm;
861 u32 cpu_index = vm->cpu_index;
863 static vlib_error_t memory[VNET_ERROR_N_DISPOSITION];
864 static char memory_init[VNET_ERROR_N_DISPOSITION];
866 buffers = vlib_frame_args (frame);
867 first_buffer = buffers;
870 vlib_buffer_t *b = vlib_get_buffer (vm, first_buffer[0]);
872 if (!memory_init[disposition])
874 memory_init[disposition] = 1;
875 memory[disposition] = b->error;
878 current_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
879 n_errors_current_sw_if_index = 0;
882 current_error = memory[disposition];
883 current_counter_index = counter_index (vm, memory[disposition]);
884 current_counter = em->counters[current_counter_index];
886 if (node->flags & VLIB_NODE_FLAG_TRACE)
887 trace_errors_with_buffers (vm, node, frame);
889 n_errors_left = frame->n_vectors;
890 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
891 (disposition == VNET_ERROR_DISPOSITION_PUNT
892 ? VNET_INTERFACE_COUNTER_PUNT
893 : VNET_INTERFACE_COUNTER_DROP));
895 while (n_errors_left >= 2)
897 vlib_buffer_t *b0, *b1;
898 vnet_sw_interface_t *sw_if0, *sw_if1;
901 u32 sw_if_index0, sw_if_index1;
909 b0 = vlib_get_buffer (vm, bi0);
910 b1 = vlib_get_buffer (vm, bi1);
915 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
916 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
918 /* Speculate that sw_if_index == sw_if_index[01]. */
919 n_errors_current_sw_if_index += 2;
921 /* Speculatively assume all 2 (node, code) pairs are equal
922 to current (node, code). */
923 current_counter += 2;
925 if (PREDICT_FALSE (e0 != current_error
926 || e1 != current_error
927 || sw_if_index0 != current_sw_if_index
928 || sw_if_index1 != current_sw_if_index))
930 current_counter -= 2;
931 n_errors_current_sw_if_index -= 2;
933 vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
934 vlib_increment_simple_counter (cm, cpu_index, sw_if_index1, 1);
936 /* Increment super-interface drop/punt counters for
938 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
939 vlib_increment_simple_counter
940 (cm, cpu_index, sw_if0->sup_sw_if_index,
941 sw_if0->sup_sw_if_index != sw_if_index0);
943 sw_if1 = vnet_get_sw_interface (vnm, sw_if_index1);
944 vlib_increment_simple_counter
945 (cm, cpu_index, sw_if1->sup_sw_if_index,
946 sw_if1->sup_sw_if_index != sw_if_index1);
948 em->counters[current_counter_index] = current_counter;
952 /* For 2 repeated errors, change current error. */
953 if (e0 == e1 && e1 != current_error)
956 current_counter_index = counter_index (vm, e0);
958 current_counter = em->counters[current_counter_index];
962 while (n_errors_left >= 1)
965 vnet_sw_interface_t *sw_if0;
967 u32 bi0, sw_if_index0;
973 current_counter += 1;
975 b0 = vlib_get_buffer (vm, bi0);
978 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
980 /* Increment drop/punt counters. */
981 vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
983 /* Increment super-interface drop/punt counters for sub-interfaces. */
984 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
985 vlib_increment_simple_counter (cm, cpu_index, sw_if0->sup_sw_if_index,
986 sw_if0->sup_sw_if_index != sw_if_index0);
988 if (PREDICT_FALSE (e0 != current_error))
990 current_counter -= 1;
992 vlib_error_elog_count (vm, current_counter_index,
994 - em->counters[current_counter_index]));
996 em->counters[current_counter_index] = current_counter;
1000 current_counter_index = counter_index (vm, e0);
1001 current_counter = em->counters[current_counter_index];
1005 if (n_errors_current_sw_if_index > 0)
1007 vnet_sw_interface_t *si;
1009 vlib_increment_simple_counter (cm, cpu_index, current_sw_if_index,
1010 n_errors_current_sw_if_index);
1012 si = vnet_get_sw_interface (vnm, current_sw_if_index);
1013 if (si->sup_sw_if_index != current_sw_if_index)
1014 vlib_increment_simple_counter (cm, cpu_index, si->sup_sw_if_index,
1015 n_errors_current_sw_if_index);
1018 vlib_error_elog_count (vm, current_counter_index,
1020 - em->counters[current_counter_index]));
1022 /* Return cached counter. */
1023 em->counters[current_counter_index] = current_counter;
1025 /* Save memory for next iteration. */
1026 memory[disposition] = current_error;
1028 if (disposition == VNET_ERROR_DISPOSITION_DROP || !vm->os_punt_frame)
1030 vlib_buffer_free (vm, first_buffer, frame->n_vectors);
1032 /* If there is no punt function, free the frame as well. */
1033 if (disposition == VNET_ERROR_DISPOSITION_PUNT && !vm->os_punt_frame)
1034 vlib_frame_free (vm, node, frame);
1037 vm->os_punt_frame (vm, node, frame);
1039 return frame->n_vectors;
1043 pcap_drop_trace (vlib_main_t * vm,
1044 vnet_interface_main_t * im, vlib_frame_t * f)
1047 u32 n_left = f->n_vectors;
1048 vlib_buffer_t *b0, *p1;
1050 i16 save_current_data;
1051 u16 save_current_length;
1053 from = vlib_frame_vector_args (f);
1057 if (PREDICT_TRUE (n_left > 1))
1059 p1 = vlib_get_buffer (vm, from[1]);
1060 vlib_prefetch_buffer_header (p1, LOAD);
1064 b0 = vlib_get_buffer (vm, bi0);
1068 /* See if we're pointedly ignoring this specific error */
1069 if (im->pcap_drop_filter_hash
1070 && hash_get (im->pcap_drop_filter_hash, b0->error))
1073 /* Trace all drops, or drops received on a specific interface */
1074 if (im->pcap_sw_if_index == 0 ||
1075 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1077 save_current_data = b0->current_data;
1078 save_current_length = b0->current_length;
1081 * Typically, we'll need to rewind the buffer
1083 if (b0->current_data > 0)
1084 vlib_buffer_advance (b0, (word) - b0->current_data);
1086 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1088 b0->current_data = save_current_data;
1089 b0->current_length = save_current_length;
1095 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1097 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1099 if (im->pcap_drop_filter_hash == 0)
1100 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1103 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1105 hash_unset (im->pcap_drop_filter_hash, error_index);
1109 process_drop (vlib_main_t * vm,
1110 vlib_node_runtime_t * node, vlib_frame_t * frame)
1112 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1114 if (PREDICT_FALSE (im->drop_pcap_enable))
1115 pcap_drop_trace (vm, im, frame);
1117 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1121 process_punt (vlib_main_t * vm,
1122 vlib_node_runtime_t * node, vlib_frame_t * frame)
1124 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1128 VLIB_REGISTER_NODE (drop_buffers,static) = {
1129 .function = process_drop,
1130 .name = "error-drop",
1131 .flags = VLIB_NODE_FLAG_IS_DROP,
1132 .vector_size = sizeof (u32),
1133 .format_trace = format_vnet_error_trace,
1134 .validate_frame = validate_error_frame,
1138 VLIB_NODE_FUNCTION_MULTIARCH (drop_buffers, process_drop);
1141 VLIB_REGISTER_NODE (punt_buffers,static) = {
1142 .function = process_punt,
1143 .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH
1144 | VLIB_NODE_FLAG_IS_PUNT),
1145 .name = "error-punt",
1146 .vector_size = sizeof (u32),
1147 .format_trace = format_vnet_error_trace,
1148 .validate_frame = validate_error_frame,
1152 VLIB_NODE_FUNCTION_MULTIARCH (punt_buffers, process_punt);
1155 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = {
1156 .function = vnet_per_buffer_interface_output,
1157 .name = "interface-output",
1158 .vector_size = sizeof (u32),
1162 VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node,
1163 vnet_per_buffer_interface_output);
1166 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1167 vlib_frame_t * from_frame)
1169 vnet_main_t *vnm = vnet_get_main ();
1170 u32 last_sw_if_index = ~0;
1171 vlib_frame_t *to_frame = 0;
1172 vnet_hw_interface_t *hw = 0;
1173 u32 *from, *to_next = 0;
1176 from = vlib_frame_vector_args (from_frame);
1177 n_left_from = from_frame->n_vectors;
1178 while (n_left_from > 0)
1187 b0 = vlib_get_buffer (vm, bi0);
1188 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1190 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1194 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1195 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1197 last_sw_if_index = sw_if_index0;
1198 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1199 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1200 to_next = vlib_frame_vector_args (to_frame);
1205 to_frame->n_vectors++;
1207 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1208 return from_frame->n_vectors;
1212 VLIB_REGISTER_NODE (interface_tx, static) = {
1213 .function = interface_tx_node_fn,
1214 .name = "interface-tx",
1215 .vector_size = sizeof (u32),
1222 VNET_FEATURE_ARC_INIT (interface_output, static) =
1224 .arc_name = "interface-output",
1225 .start_nodes = VNET_FEATURES (0),
1226 .end_node = "interface-tx",
1227 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1230 VNET_FEATURE_INIT (span_tx, static) = {
1231 .arc_name = "interface-output",
1232 .node_name = "span-output",
1233 .runs_before = VNET_FEATURES ("interface-tx"),
1236 VNET_FEATURE_INIT (interface_tx, static) = {
1237 .arc_name = "interface-output",
1238 .node_name = "interface-tx",
1244 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1248 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1251 next_index = vlib_node_add_next_with_slot
1252 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1253 hi->output_node_index,
1254 /* next_index */ hw_if_index);
1256 ASSERT (next_index == hw_if_index);
1261 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1262 (vnet_per_buffer_interface_output_hw_interface_add_del);
1264 static clib_error_t *
1265 pcap_drop_trace_command_fn (vlib_main_t * vm,
1266 unformat_input_t * input,
1267 vlib_cli_command_t * cmd)
1269 vnet_main_t *vnm = vnet_get_main ();
1270 vnet_interface_main_t *im = &vnm->interface_main;
1274 clib_error_t *error = 0;
1276 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1278 if (unformat (input, "on"))
1280 if (im->drop_pcap_enable == 0)
1282 if (im->pcap_filename == 0)
1283 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1285 memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1286 im->pcap_main.file_name = (char *) im->pcap_filename;
1287 im->pcap_main.n_packets_to_capture = 100;
1288 if (im->pcap_pkts_to_capture)
1289 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1291 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1292 im->drop_pcap_enable = 1;
1294 vlib_cli_output (vm, "pcap drop capture on...");
1298 vlib_cli_output (vm, "pcap drop capture already on...");
1302 else if (unformat (input, "off"))
1306 if (im->drop_pcap_enable)
1308 vlib_cli_output (vm, "captured %d pkts...",
1309 im->pcap_main.n_packets_captured);
1310 if (im->pcap_main.n_packets_captured)
1312 im->pcap_main.n_packets_to_capture =
1313 im->pcap_main.n_packets_captured;
1314 error = pcap_write (&im->pcap_main);
1316 clib_error_report (error);
1318 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1323 vlib_cli_output (vm, "pcap drop capture already off...");
1326 im->drop_pcap_enable = 0;
1328 else if (unformat (input, "max %d", &max))
1330 im->pcap_pkts_to_capture = max;
1334 else if (unformat (input, "intfc %U",
1335 unformat_vnet_sw_interface, vnm,
1336 &im->pcap_sw_if_index))
1338 else if (unformat (input, "intfc any"))
1340 im->pcap_sw_if_index = 0;
1343 else if (unformat (input, "file %s", &filename))
1345 u8 *chroot_filename;
1346 /* Brain-police user path input */
1347 if (strstr ((char *) filename, "..")
1348 || index ((char *) filename, '/'))
1350 vlib_cli_output (vm, "illegal characters in filename '%s'",
1355 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1356 vec_free (filename);
1358 if (im->pcap_filename)
1359 vec_free (im->pcap_filename);
1360 vec_add1 (filename, 0);
1361 im->pcap_filename = chroot_filename;
1364 else if (unformat (input, "status"))
1366 if (im->drop_pcap_enable == 0)
1368 vlib_cli_output (vm, "pcap drop capture is off...");
1372 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1373 im->pcap_main.n_packets_captured,
1374 im->pcap_main.n_packets_to_capture);
1383 return clib_error_return (0, "unknown input `%U'",
1384 format_unformat_error, input);
1390 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1391 .path = "pcap drop trace",
1393 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1394 .function = pcap_drop_trace_command_fn,
1399 * fd.io coding-style-patch-verification: ON
1402 * eval: (c-set-style "gnu")