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>
45 u8 data[128 - sizeof (u32)];
47 interface_output_trace_t;
50 format_vnet_interface_output_trace (u8 * s, va_list * va)
52 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
53 vlib_node_t *node = va_arg (*va, vlib_node_t *);
54 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
55 vnet_main_t *vnm = vnet_get_main ();
56 vnet_sw_interface_t *si;
59 if (t->sw_if_index != (u32) ~ 0)
61 si = vnet_get_sw_interface (vnm, t->sw_if_index);
62 indent = format_get_indent (s);
64 s = format (s, "%U\n%U%U",
65 format_vnet_sw_interface_name, vnm, si,
66 format_white_space, indent,
67 node->format_buffer ? node->
68 format_buffer : format_hex_bytes, t->data,
75 vnet_interface_output_trace (vlib_main_t * vm,
76 vlib_node_runtime_t * node,
77 vlib_frame_t * frame, uword n_buffers)
82 from = vlib_frame_args (frame);
87 vlib_buffer_t *b0, *b1;
88 interface_output_trace_t *t0, *t1;
90 /* Prefetch next iteration. */
91 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
92 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
97 b0 = vlib_get_buffer (vm, bi0);
98 b1 = vlib_get_buffer (vm, bi1);
100 if (b0->flags & VLIB_BUFFER_IS_TRACED)
102 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
103 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
104 clib_memcpy (t0->data, vlib_buffer_get_current (b0),
107 if (b1->flags & VLIB_BUFFER_IS_TRACED)
109 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
110 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
111 clib_memcpy (t1->data, vlib_buffer_get_current (b1),
122 interface_output_trace_t *t0;
126 b0 = vlib_get_buffer (vm, bi0);
128 if (b0->flags & VLIB_BUFFER_IS_TRACED)
130 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
131 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
132 clib_memcpy (t0->data, vlib_buffer_get_current (b0),
140 static never_inline u32
141 slow_path (vlib_main_t * vm,
144 u32 n_left_to_tx, u32 * to_tx, u32 * n_slow_bytes_result)
146 /* We've already enqueued a single buffer. */
148 u32 n_slow_bytes = 0;
150 while (n_left_to_tx > 0)
156 n_slow_bytes += vlib_buffer_length_in_chain (vm, b);
158 /* Be grumpy about zero length buffers for benefit of
159 driver tx function. */
160 ASSERT (b->current_length > 0);
162 if (!(b->flags & VLIB_BUFFER_NEXT_PRESENT))
166 b = vlib_get_buffer (vm, bi);
169 /* Ran out of space in next frame trying to enqueue buffers? */
170 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
173 *n_slow_bytes_result = n_slow_bytes;
178 * Increment TX stats. Roll up consecutive increments to the same sw_if_index
179 * into one increment.
181 static_always_inline void
182 incr_output_stats (vnet_main_t * vnm,
186 u32 * last_sw_if_index, u32 * n_packets, u32 * n_bytes)
188 vnet_interface_main_t *im;
190 if (PREDICT_TRUE (sw_if_index == *last_sw_if_index))
197 if (PREDICT_TRUE (*last_sw_if_index != ~0))
199 im = &vnm->interface_main;
201 vlib_increment_combined_counter (im->combined_sw_if_counters
202 + VNET_INTERFACE_COUNTER_TX,
205 *n_packets, *n_bytes);
207 *last_sw_if_index = sw_if_index;
214 /* Interface output functions. */
216 vnet_interface_output_node (vlib_main_t * vm,
217 vlib_node_runtime_t * node, vlib_frame_t * frame)
219 vnet_main_t *vnm = vnet_get_main ();
220 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
221 vnet_sw_interface_t *si;
222 vnet_hw_interface_t *hi;
223 u32 n_left_to_tx, *from, *from_end, *to_tx;
224 u32 n_bytes, n_buffers, n_packets;
225 u32 last_sw_if_index;
226 u32 cpu_index = vm->cpu_index;
228 n_buffers = frame->n_vectors;
230 if (node->flags & VLIB_NODE_FLAG_TRACE)
231 vnet_interface_output_trace (vm, node, frame, n_buffers);
233 from = vlib_frame_args (frame);
236 return vlib_error_drop_buffers (vm, node, from,
237 /* buffer stride */ 1,
239 VNET_INTERFACE_OUTPUT_NEXT_DROP,
241 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
243 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
244 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
245 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
246 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
248 vlib_simple_counter_main_t *cm;
250 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
251 VNET_INTERFACE_COUNTER_TX_ERROR);
252 vlib_increment_simple_counter (cm, cpu_index,
253 rt->sw_if_index, n_buffers);
254 return vlib_error_drop_buffers (vm, node, from,
255 /* buffer stride */ 1,
257 VNET_INTERFACE_OUTPUT_NEXT_DROP,
259 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
262 from_end = from + n_buffers;
264 /* Total byte count of all buffers. */
267 last_sw_if_index = ~0;
269 while (from < from_end)
271 /* Get new next frame since previous incomplete frame may have less
272 than VNET_FRAME_SIZE vectors in it. */
273 vlib_get_new_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX,
274 to_tx, n_left_to_tx);
276 while (from + 4 <= from_end && n_left_to_tx >= 2)
279 vlib_buffer_t *b0, *b1;
281 /* Prefetch next iteration. */
282 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
283 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
293 b0 = vlib_get_buffer (vm, bi0);
294 b1 = vlib_get_buffer (vm, bi1);
296 /* Be grumpy about zero length buffers for benefit of
297 driver tx function. */
298 ASSERT (b0->current_length > 0);
299 ASSERT (b1->current_length > 0);
302 ((b0->flags | b1->flags) & VLIB_BUFFER_NEXT_PRESENT))
304 u32 n_buffers, n_slow_bytes, i;
311 /* Do slow path two times. */
312 for (i = 0; i < 2; i++)
314 u32 bi = i ? bi1 : bi0;
315 vlib_buffer_t *b = i ? b1 : b0;
317 n_buffers = slow_path (vm, bi, b,
318 n_left_to_tx, to_tx, &n_slow_bytes);
320 /* Not enough room for single packet? */
326 n_left_to_tx -= n_buffers;
327 incr_output_stats (vnm, cpu_index, n_slow_bytes,
328 vnet_buffer (b)->sw_if_index[VLIB_TX],
329 &last_sw_if_index, &n_packets, &n_bytes);
334 incr_output_stats (vnm, cpu_index,
335 vlib_buffer_length_in_chain (vm, b0),
336 vnet_buffer (b0)->sw_if_index[VLIB_TX],
337 &last_sw_if_index, &n_packets, &n_bytes);
338 incr_output_stats (vnm, cpu_index,
339 vlib_buffer_length_in_chain (vm, b0),
340 vnet_buffer (b1)->sw_if_index[VLIB_TX],
341 &last_sw_if_index, &n_packets, &n_bytes);
345 while (from + 1 <= from_end && n_left_to_tx >= 1)
356 b0 = vlib_get_buffer (vm, bi0);
358 /* Be grumpy about zero length buffers for benefit of
359 driver tx function. */
360 ASSERT (b0->current_length > 0);
362 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
364 u32 n_buffers, n_slow_bytes;
371 n_buffers = slow_path (vm, bi0, b0,
372 n_left_to_tx, to_tx, &n_slow_bytes);
374 /* Not enough room for single packet? */
380 n_left_to_tx -= n_buffers;
382 incr_output_stats (vnm, cpu_index,
383 vlib_buffer_length_in_chain (vm, b0),
384 vnet_buffer (b0)->sw_if_index[VLIB_TX],
385 &last_sw_if_index, &n_packets, &n_bytes);
389 vlib_put_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX,
393 /* Final update of interface stats. */
394 incr_output_stats (vnm, cpu_index, 0, ~0, /* ~0 will flush stats */
395 &last_sw_if_index, &n_packets, &n_bytes);
400 VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node);
401 CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node);
404 vnet_interface_output_node_no_flatten (vlib_main_t * vm,
405 vlib_node_runtime_t * node,
406 vlib_frame_t * frame)
408 vnet_main_t *vnm = vnet_get_main ();
409 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
410 vnet_sw_interface_t *si;
411 vnet_hw_interface_t *hi;
412 u32 n_left_to_tx, *from, *from_end, *to_tx;
413 u32 n_bytes, n_buffers, n_packets;
414 u32 n_bytes_b0, n_bytes_b1;
415 u32 cpu_index = vm->cpu_index;
416 vnet_interface_main_t *im = &vnm->interface_main;
417 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
419 n_buffers = frame->n_vectors;
421 if (node->flags & VLIB_NODE_FLAG_TRACE)
422 vnet_interface_output_trace (vm, node, frame, n_buffers);
424 from = vlib_frame_args (frame);
427 return vlib_error_drop_buffers (vm, node, from,
428 /* buffer stride */ 1,
430 VNET_INTERFACE_OUTPUT_NEXT_DROP,
432 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
434 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
435 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
436 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
437 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
439 vlib_simple_counter_main_t *cm;
441 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
442 VNET_INTERFACE_COUNTER_TX_ERROR);
443 vlib_increment_simple_counter (cm, cpu_index,
444 rt->sw_if_index, n_buffers);
446 return vlib_error_drop_buffers (vm, node, from,
447 /* buffer stride */ 1,
449 VNET_INTERFACE_OUTPUT_NEXT_DROP,
451 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
454 from_end = from + n_buffers;
456 /* Total byte count of all buffers. */
460 while (from < from_end)
462 /* Get new next frame since previous incomplete frame may have less
463 than VNET_FRAME_SIZE vectors in it. */
464 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
466 while (from + 4 <= from_end && n_left_to_tx >= 2)
469 vlib_buffer_t *b0, *b1;
470 u32 tx_swif0, tx_swif1;
472 /* Prefetch next iteration. */
473 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
474 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
484 b0 = vlib_get_buffer (vm, bi0);
485 b1 = vlib_get_buffer (vm, bi1);
487 /* Be grumpy about zero length buffers for benefit of
488 driver tx function. */
489 ASSERT (b0->current_length > 0);
490 ASSERT (b1->current_length > 0);
492 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
493 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1);
494 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
495 tx_swif1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
497 n_bytes += n_bytes_b0 + n_bytes_b1;
500 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
502 /* update vlan subif tx counts, if required */
503 vlib_increment_combined_counter (im->combined_sw_if_counters +
504 VNET_INTERFACE_COUNTER_TX,
505 cpu_index, tx_swif0, 1,
509 /* update vlan subif tx counts, if required */
510 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
513 vlib_increment_combined_counter (im->combined_sw_if_counters +
514 VNET_INTERFACE_COUNTER_TX,
515 cpu_index, tx_swif1, 1,
520 while (from + 1 <= from_end && n_left_to_tx >= 1)
532 b0 = vlib_get_buffer (vm, bi0);
534 /* Be grumpy about zero length buffers for benefit of
535 driver tx function. */
536 ASSERT (b0->current_length > 0);
538 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
539 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
540 n_bytes += n_bytes_b0;
543 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
546 vlib_increment_combined_counter (im->combined_sw_if_counters +
547 VNET_INTERFACE_COUNTER_TX,
548 cpu_index, tx_swif0, 1,
553 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
556 /* Update main interface stats. */
557 vlib_increment_combined_counter (im->combined_sw_if_counters
558 + VNET_INTERFACE_COUNTER_TX,
560 rt->sw_if_index, n_packets, n_bytes);
564 VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node_no_flatten);
565 CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node_no_flatten);
567 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
569 vnet_per_buffer_interface_output (vlib_main_t * vm,
570 vlib_node_runtime_t * node,
571 vlib_frame_t * frame)
573 vnet_main_t *vnm = vnet_get_main ();
574 u32 n_left_to_next, *from, *to_next;
575 u32 n_left_from, next_index;
577 n_left_from = frame->n_vectors;
579 from = vlib_frame_args (frame);
580 next_index = node->cached_next_index;
582 while (n_left_from > 0)
584 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
586 while (n_left_from >= 4 && n_left_to_next >= 2)
588 u32 bi0, bi1, next0, next1;
589 vlib_buffer_t *b0, *b1;
590 vnet_hw_interface_t *hi0, *hi1;
592 /* Prefetch next iteration. */
593 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
594 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
605 b0 = vlib_get_buffer (vm, bi0);
606 b1 = vlib_get_buffer (vm, bi1);
609 vnet_get_sup_hw_interface (vnm,
610 vnet_buffer (b0)->sw_if_index
613 vnet_get_sup_hw_interface (vnm,
614 vnet_buffer (b1)->sw_if_index
617 next0 = hi0->hw_if_index;
618 next1 = hi1->hw_if_index;
620 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
621 n_left_to_next, bi0, bi1, next0,
625 while (n_left_from > 0 && n_left_to_next > 0)
629 vnet_hw_interface_t *hi0;
638 b0 = vlib_get_buffer (vm, bi0);
641 vnet_get_sup_hw_interface (vnm,
642 vnet_buffer (b0)->sw_if_index
645 next0 = hi0->hw_if_index;
647 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
648 n_left_to_next, bi0, next0);
651 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
654 return frame->n_vectors;
658 counter_index (vlib_main_t * vm, vlib_error_t e)
663 ni = vlib_error_get_node (e);
664 n = vlib_get_node (vm, ni);
666 ci = vlib_error_get_code (e);
667 ASSERT (ci < n->n_errors);
669 ci += n->error_heap_index;
675 format_vnet_error_trace (u8 * s, va_list * va)
677 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
678 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
679 vlib_error_t *e = va_arg (*va, vlib_error_t *);
680 vlib_node_t *error_node;
681 vlib_error_main_t *em = &vm->error_main;
684 error_node = vlib_get_node (vm, vlib_error_get_node (e[0]));
685 i = counter_index (vm, e[0]);
686 s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]);
692 trace_errors_with_buffers (vlib_main_t * vm,
693 vlib_node_runtime_t * node, vlib_frame_t * frame)
695 u32 n_left, *buffers;
697 buffers = vlib_frame_vector_args (frame);
698 n_left = frame->n_vectors;
703 vlib_buffer_t *b0, *b1;
704 vlib_error_t *t0, *t1;
706 /* Prefetch next iteration. */
707 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
708 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
713 b0 = vlib_get_buffer (vm, bi0);
714 b1 = vlib_get_buffer (vm, bi1);
716 if (b0->flags & VLIB_BUFFER_IS_TRACED)
718 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
721 if (b1->flags & VLIB_BUFFER_IS_TRACED)
723 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
738 b0 = vlib_get_buffer (vm, bi0);
740 if (b0->flags & VLIB_BUFFER_IS_TRACED)
742 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
751 validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index)
753 uword node_index = vlib_error_get_node (e[0]);
754 uword code = vlib_error_get_code (e[0]);
757 if (node_index >= vec_len (vm->node_main.nodes))
758 return format (0, "[%d], node index out of range 0x%x, error 0x%x",
759 index, node_index, e[0]);
761 n = vlib_get_node (vm, node_index);
762 if (code >= n->n_errors)
763 return format (0, "[%d], code %d out of range for node %v",
764 index, code, n->name);
770 validate_error_frame (vlib_main_t * vm,
771 vlib_node_runtime_t * node, vlib_frame_t * f)
773 u32 *buffers = vlib_frame_args (f);
778 for (i = 0; i < f->n_vectors; i++)
780 b = vlib_get_buffer (vm, buffers[i]);
781 msg = validate_error (vm, &b->error, i);
791 VNET_ERROR_DISPOSITION_DROP,
792 VNET_ERROR_DISPOSITION_PUNT,
793 VNET_ERROR_N_DISPOSITION,
794 } vnet_error_disposition_t;
797 do_packet (vlib_main_t * vm, vlib_error_t a)
799 vlib_error_main_t *em = &vm->error_main;
800 u32 i = counter_index (vm, a);
801 em->counters[i] += 1;
802 vlib_error_elog_count (vm, i, 1);
805 static_always_inline uword
806 process_drop_punt (vlib_main_t * vm,
807 vlib_node_runtime_t * node,
808 vlib_frame_t * frame, vnet_error_disposition_t disposition)
810 vnet_main_t *vnm = vnet_get_main ();
811 vlib_error_main_t *em = &vm->error_main;
812 u32 *buffers, *first_buffer;
813 vlib_error_t current_error;
814 u32 current_counter_index, n_errors_left;
815 u32 current_sw_if_index, n_errors_current_sw_if_index;
817 vlib_simple_counter_main_t *cm;
818 u32 cpu_index = vm->cpu_index;
820 static vlib_error_t memory[VNET_ERROR_N_DISPOSITION];
821 static char memory_init[VNET_ERROR_N_DISPOSITION];
823 buffers = vlib_frame_args (frame);
824 first_buffer = buffers;
827 vlib_buffer_t *b = vlib_get_buffer (vm, first_buffer[0]);
829 if (!memory_init[disposition])
831 memory_init[disposition] = 1;
832 memory[disposition] = b->error;
835 current_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
836 n_errors_current_sw_if_index = 0;
839 current_error = memory[disposition];
840 current_counter_index = counter_index (vm, memory[disposition]);
841 current_counter = em->counters[current_counter_index];
843 if (node->flags & VLIB_NODE_FLAG_TRACE)
844 trace_errors_with_buffers (vm, node, frame);
846 n_errors_left = frame->n_vectors;
847 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
848 (disposition == VNET_ERROR_DISPOSITION_PUNT
849 ? VNET_INTERFACE_COUNTER_PUNT
850 : VNET_INTERFACE_COUNTER_DROP));
852 while (n_errors_left >= 2)
854 vlib_buffer_t *b0, *b1;
855 vnet_sw_interface_t *sw_if0, *sw_if1;
858 u32 sw_if_index0, sw_if_index1;
866 b0 = vlib_get_buffer (vm, bi0);
867 b1 = vlib_get_buffer (vm, bi1);
872 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
873 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
875 /* Speculate that sw_if_index == sw_if_index[01]. */
876 n_errors_current_sw_if_index += 2;
878 /* Speculatively assume all 2 (node, code) pairs are equal
879 to current (node, code). */
880 current_counter += 2;
882 if (PREDICT_FALSE (e0 != current_error
883 || e1 != current_error
884 || sw_if_index0 != current_sw_if_index
885 || sw_if_index1 != current_sw_if_index))
887 current_counter -= 2;
888 n_errors_current_sw_if_index -= 2;
890 vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
891 vlib_increment_simple_counter (cm, cpu_index, sw_if_index1, 1);
893 /* Increment super-interface drop/punt counters for
895 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
896 vlib_increment_simple_counter
897 (cm, cpu_index, sw_if0->sup_sw_if_index,
898 sw_if0->sup_sw_if_index != sw_if_index0);
900 sw_if1 = vnet_get_sw_interface (vnm, sw_if_index1);
901 vlib_increment_simple_counter
902 (cm, cpu_index, sw_if1->sup_sw_if_index,
903 sw_if1->sup_sw_if_index != sw_if_index1);
905 em->counters[current_counter_index] = current_counter;
909 /* For 2 repeated errors, change current error. */
910 if (e0 == e1 && e1 != current_error)
913 current_counter_index = counter_index (vm, e0);
915 current_counter = em->counters[current_counter_index];
919 while (n_errors_left >= 1)
922 vnet_sw_interface_t *sw_if0;
924 u32 bi0, sw_if_index0;
930 current_counter += 1;
932 b0 = vlib_get_buffer (vm, bi0);
935 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
937 /* Increment drop/punt counters. */
938 vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
940 /* Increment super-interface drop/punt counters for sub-interfaces. */
941 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
942 vlib_increment_simple_counter (cm, cpu_index, sw_if0->sup_sw_if_index,
943 sw_if0->sup_sw_if_index != sw_if_index0);
945 if (PREDICT_FALSE (e0 != current_error))
947 current_counter -= 1;
949 vlib_error_elog_count (vm, current_counter_index,
951 - em->counters[current_counter_index]));
953 em->counters[current_counter_index] = current_counter;
957 current_counter_index = counter_index (vm, e0);
958 current_counter = em->counters[current_counter_index];
962 if (n_errors_current_sw_if_index > 0)
964 vnet_sw_interface_t *si;
966 vlib_increment_simple_counter (cm, cpu_index, current_sw_if_index,
967 n_errors_current_sw_if_index);
969 si = vnet_get_sw_interface (vnm, current_sw_if_index);
970 if (si->sup_sw_if_index != current_sw_if_index)
971 vlib_increment_simple_counter (cm, cpu_index, si->sup_sw_if_index,
972 n_errors_current_sw_if_index);
975 vlib_error_elog_count (vm, current_counter_index,
977 - em->counters[current_counter_index]));
979 /* Return cached counter. */
980 em->counters[current_counter_index] = current_counter;
982 /* Save memory for next iteration. */
983 memory[disposition] = current_error;
985 if (disposition == VNET_ERROR_DISPOSITION_DROP || !vm->os_punt_frame)
987 vlib_buffer_free (vm, first_buffer, frame->n_vectors);
989 /* If there is no punt function, free the frame as well. */
990 if (disposition == VNET_ERROR_DISPOSITION_PUNT && !vm->os_punt_frame)
991 vlib_frame_free (vm, node, frame);
994 vm->os_punt_frame (vm, node, frame);
996 return frame->n_vectors;
1000 pcap_drop_trace (vlib_main_t * vm,
1001 vnet_interface_main_t * im, vlib_frame_t * f)
1004 u32 n_left = f->n_vectors;
1005 vlib_buffer_t *b0, *p1;
1007 i16 save_current_data;
1008 u16 save_current_length;
1010 from = vlib_frame_vector_args (f);
1014 if (PREDICT_TRUE (n_left > 1))
1016 p1 = vlib_get_buffer (vm, from[1]);
1017 vlib_prefetch_buffer_header (p1, LOAD);
1021 b0 = vlib_get_buffer (vm, bi0);
1025 /* See if we're pointedly ignoring this specific error */
1026 if (im->pcap_drop_filter_hash
1027 && hash_get (im->pcap_drop_filter_hash, b0->error))
1030 /* Trace all drops, or drops received on a specific interface */
1031 if (im->pcap_sw_if_index == 0 ||
1032 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1034 save_current_data = b0->current_data;
1035 save_current_length = b0->current_length;
1038 * Typically, we'll need to rewind the buffer
1040 if (b0->current_data > 0)
1041 vlib_buffer_advance (b0, (word) - b0->current_data);
1043 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1045 b0->current_data = save_current_data;
1046 b0->current_length = save_current_length;
1052 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1054 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1056 if (im->pcap_drop_filter_hash == 0)
1057 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1060 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1062 hash_unset (im->pcap_drop_filter_hash, error_index);
1066 process_drop (vlib_main_t * vm,
1067 vlib_node_runtime_t * node, vlib_frame_t * frame)
1069 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1071 if (PREDICT_FALSE (im->drop_pcap_enable))
1072 pcap_drop_trace (vm, im, frame);
1074 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1078 process_punt (vlib_main_t * vm,
1079 vlib_node_runtime_t * node, vlib_frame_t * frame)
1081 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1085 VLIB_REGISTER_NODE (drop_buffers,static) = {
1086 .function = process_drop,
1087 .name = "error-drop",
1088 .flags = VLIB_NODE_FLAG_IS_DROP,
1089 .vector_size = sizeof (u32),
1090 .format_trace = format_vnet_error_trace,
1091 .validate_frame = validate_error_frame,
1095 VLIB_NODE_FUNCTION_MULTIARCH (drop_buffers, process_drop);
1098 VLIB_REGISTER_NODE (punt_buffers,static) = {
1099 .function = process_punt,
1100 .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH
1101 | VLIB_NODE_FLAG_IS_PUNT),
1102 .name = "error-punt",
1103 .vector_size = sizeof (u32),
1104 .format_trace = format_vnet_error_trace,
1105 .validate_frame = validate_error_frame,
1109 VLIB_NODE_FUNCTION_MULTIARCH (punt_buffers, process_punt);
1112 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = {
1113 .function = vnet_per_buffer_interface_output,
1114 .name = "interface-output",
1115 .vector_size = sizeof (u32),
1119 VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node,
1120 vnet_per_buffer_interface_output);
1123 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1127 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1130 next_index = vlib_node_add_next_with_slot
1131 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1132 hi->output_node_index,
1133 /* next_index */ hw_if_index);
1135 ASSERT (next_index == hw_if_index);
1140 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1141 (vnet_per_buffer_interface_output_hw_interface_add_del);
1143 static clib_error_t *
1144 pcap_drop_trace_command_fn (vlib_main_t * vm,
1145 unformat_input_t * input,
1146 vlib_cli_command_t * cmd)
1148 vnet_main_t *vnm = vnet_get_main ();
1149 vnet_interface_main_t *im = &vnm->interface_main;
1153 clib_error_t *error = 0;
1155 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1157 if (unformat (input, "on"))
1159 if (im->drop_pcap_enable == 0)
1161 if (im->pcap_filename == 0)
1162 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1164 memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1165 im->pcap_main.file_name = (char *) im->pcap_filename;
1166 im->pcap_main.n_packets_to_capture = 100;
1167 if (im->pcap_pkts_to_capture)
1168 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1170 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1171 im->drop_pcap_enable = 1;
1173 vlib_cli_output (vm, "pcap drop capture on...");
1177 vlib_cli_output (vm, "pcap drop capture already on...");
1181 else if (unformat (input, "off"))
1185 if (im->drop_pcap_enable)
1187 vlib_cli_output (vm, "captured %d pkts...",
1188 im->pcap_main.n_packets_captured);
1189 if (im->pcap_main.n_packets_captured)
1191 im->pcap_main.n_packets_to_capture =
1192 im->pcap_main.n_packets_captured;
1193 error = pcap_write (&im->pcap_main);
1195 clib_error_report (error);
1197 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1202 vlib_cli_output (vm, "pcap drop capture already off...");
1205 im->drop_pcap_enable = 0;
1207 else if (unformat (input, "max %d", &max))
1209 im->pcap_pkts_to_capture = max;
1213 else if (unformat (input, "intfc %U",
1214 unformat_vnet_sw_interface, vnm,
1215 &im->pcap_sw_if_index))
1217 else if (unformat (input, "intfc any"))
1219 im->pcap_sw_if_index = 0;
1222 else if (unformat (input, "file %s", &filename))
1224 u8 *chroot_filename;
1225 /* Brain-police user path input */
1226 if (strstr ((char *) filename, "..")
1227 || index ((char *) filename, '/'))
1229 vlib_cli_output (vm, "illegal characters in filename '%s'",
1234 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1235 vec_free (filename);
1237 if (im->pcap_filename)
1238 vec_free (im->pcap_filename);
1239 vec_add1 (filename, 0);
1240 im->pcap_filename = chroot_filename;
1243 else if (unformat (input, "status"))
1245 if (im->drop_pcap_enable == 0)
1247 vlib_cli_output (vm, "pcap drop capture is off...");
1251 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1252 im->pcap_main.n_packets_captured,
1253 im->pcap_main.n_packets_to_capture);
1262 return clib_error_return (0, "unknown input `%U'",
1263 format_unformat_error, input);
1269 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1270 .path = "pcap drop trace",
1272 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1273 .function = pcap_drop_trace_command_fn,
1278 * fd.io coding-style-patch-verification: ON
1281 * eval: (c-set-style "gnu")