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>
44 u8 data[128 - sizeof (u32)];
45 } interface_output_trace_t;
47 u8 * format_vnet_interface_output_trace (u8 * s, va_list * va)
49 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
50 vlib_node_t * node = va_arg (*va, vlib_node_t *);
51 interface_output_trace_t * t = va_arg (*va, interface_output_trace_t *);
52 vnet_main_t * vnm = vnet_get_main();
53 vnet_sw_interface_t * si;
56 if (t->sw_if_index != (u32)~0)
58 si = vnet_get_sw_interface (vnm, t->sw_if_index);
59 indent = format_get_indent (s);
61 s = format (s, "%U\n%U%U",
62 format_vnet_sw_interface_name, vnm, si,
63 format_white_space, indent,
64 node->format_buffer ? node->format_buffer : format_hex_bytes,
65 t->data, sizeof (t->data));
71 vnet_interface_output_trace (vlib_main_t * vm,
72 vlib_node_runtime_t * node,
79 from = vlib_frame_args (frame);
84 vlib_buffer_t * b0, * b1;
85 interface_output_trace_t * t0, * t1;
87 /* Prefetch next iteration. */
88 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
89 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
94 b0 = vlib_get_buffer (vm, bi0);
95 b1 = vlib_get_buffer (vm, bi1);
97 if (b0->flags & VLIB_BUFFER_IS_TRACED)
99 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
100 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
101 clib_memcpy (t0->data, vlib_buffer_get_current (b0),
104 if (b1->flags & VLIB_BUFFER_IS_TRACED)
106 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
107 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
108 clib_memcpy (t1->data, vlib_buffer_get_current (b1),
119 interface_output_trace_t * t0;
123 b0 = vlib_get_buffer (vm, bi0);
125 if (b0->flags & VLIB_BUFFER_IS_TRACED)
127 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
128 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
129 clib_memcpy (t0->data, vlib_buffer_get_current (b0),
137 static never_inline u32
138 slow_path (vlib_main_t * vm,
143 u32 * n_slow_bytes_result)
145 /* We've already enqueued a single buffer. */
147 u32 n_slow_bytes = 0;
149 while (n_left_to_tx > 0)
155 n_slow_bytes += vlib_buffer_length_in_chain (vm, b);
157 /* Be grumpy about zero length buffers for benefit of
158 driver tx function. */
159 ASSERT (b->current_length > 0);
161 if (! (b->flags & VLIB_BUFFER_NEXT_PRESENT))
165 b = vlib_get_buffer (vm, bi);
168 /* Ran out of space in next frame trying to enqueue buffers? */
169 if (b->flags & VLIB_BUFFER_NEXT_PRESENT)
172 *n_slow_bytes_result = n_slow_bytes;
177 * Increment TX stats. Roll up consecutive increments to the same sw_if_index
178 * into one increment.
181 void incr_output_stats (vnet_main_t * vnm,
185 u32 * last_sw_if_index,
188 vnet_interface_main_t * im;
190 if (PREDICT_TRUE (sw_if_index == *last_sw_if_index)) {
194 if (PREDICT_TRUE (*last_sw_if_index != ~0)) {
195 im = &vnm->interface_main;
197 vlib_increment_combined_counter (im->combined_sw_if_counters
198 + VNET_INTERFACE_COUNTER_TX,
204 *last_sw_if_index = sw_if_index;
211 /* Interface output functions. */
213 vnet_interface_output_node (vlib_main_t * vm,
214 vlib_node_runtime_t * node,
215 vlib_frame_t * frame)
217 vnet_main_t * vnm = vnet_get_main();
218 vnet_interface_output_runtime_t * rt = (void *) node->runtime_data;
219 vnet_sw_interface_t * si;
220 vnet_hw_interface_t * hi;
221 u32 n_left_to_tx, * from, * from_end, * to_tx;
222 u32 n_bytes, n_buffers, n_packets;
223 u32 last_sw_if_index;
224 u32 cpu_index = vm->cpu_index;
226 n_buffers = frame->n_vectors;
228 if (node->flags & VLIB_NODE_FLAG_TRACE)
229 vnet_interface_output_trace (vm, node, frame, n_buffers);
231 from = vlib_frame_args (frame);
234 return vlib_error_drop_buffers (vm, node,
236 /* buffer stride */ 1,
238 VNET_INTERFACE_OUTPUT_NEXT_DROP,
240 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
242 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
243 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
244 if (! (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
245 ! (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
247 vlib_simple_counter_main_t * cm;
249 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
250 VNET_INTERFACE_COUNTER_TX_ERROR);
251 vlib_increment_simple_counter (cm, cpu_index,
252 rt->sw_if_index, n_buffers);
253 return vlib_error_drop_buffers (vm, node,
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);
301 if (PREDICT_FALSE ((b0->flags | b1->flags) & VLIB_BUFFER_NEXT_PRESENT))
303 u32 n_buffers, n_slow_bytes, i;
310 /* Do slow path two times. */
311 for (i = 0; i < 2; i++)
313 u32 bi = i ? bi1 : bi0;
314 vlib_buffer_t * b = i ? b1 : b0;
316 n_buffers = slow_path (vm, bi, b,
317 n_left_to_tx, to_tx, &n_slow_bytes);
319 /* Not enough room for single packet? */
325 n_left_to_tx -= n_buffers;
326 incr_output_stats (vnm, cpu_index, n_slow_bytes,
327 vnet_buffer(b)->sw_if_index[VLIB_TX],
328 &last_sw_if_index, &n_packets, &n_bytes);
331 incr_output_stats (vnm, cpu_index,
332 vlib_buffer_length_in_chain (vm, b0),
333 vnet_buffer(b0)->sw_if_index[VLIB_TX],
334 &last_sw_if_index, &n_packets, &n_bytes);
335 incr_output_stats (vnm, cpu_index,
336 vlib_buffer_length_in_chain (vm, b0),
337 vnet_buffer(b1)->sw_if_index[VLIB_TX],
338 &last_sw_if_index, &n_packets, &n_bytes);
342 while (from + 1 <= from_end && n_left_to_tx >= 1)
353 b0 = vlib_get_buffer (vm, bi0);
355 /* Be grumpy about zero length buffers for benefit of
356 driver tx function. */
357 ASSERT (b0->current_length > 0);
359 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_NEXT_PRESENT))
361 u32 n_buffers, n_slow_bytes;
368 n_buffers = slow_path (vm, bi0, b0,
369 n_left_to_tx, to_tx, &n_slow_bytes);
371 /* Not enough room for single packet? */
377 n_left_to_tx -= n_buffers;
379 incr_output_stats (vnm, cpu_index,
380 vlib_buffer_length_in_chain (vm, b0),
381 vnet_buffer(b0)->sw_if_index[VLIB_TX],
382 &last_sw_if_index, &n_packets, &n_bytes);
386 vlib_put_next_frame (vm, node, VNET_INTERFACE_OUTPUT_NEXT_TX, n_left_to_tx);
389 /* Final update of interface stats. */
390 incr_output_stats (vnm, cpu_index, 0, ~0, /* ~0 will flush stats */
391 &last_sw_if_index, &n_packets, &n_bytes);
396 VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node)
397 CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node)
400 vnet_interface_output_node_no_flatten_inline (vlib_main_t * vm,
401 vlib_node_runtime_t * node,
402 vlib_frame_t * frame,
405 vnet_main_t * vnm = vnet_get_main();
406 vnet_interface_output_runtime_t * rt = (void *) node->runtime_data;
407 vnet_sw_interface_t * si;
408 vnet_hw_interface_t * hi;
409 u32 n_left_to_tx, * from, * from_end, * to_tx;
410 u32 n_bytes, n_buffers, n_packets;
411 u32 n_bytes_b0, n_bytes_b1;
412 u32 cpu_index = vm->cpu_index;
413 vnet_interface_main_t * im = &vnm->interface_main;
414 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
416 n_buffers = frame->n_vectors;
418 if (node->flags & VLIB_NODE_FLAG_TRACE)
419 vnet_interface_output_trace (vm, node, frame, n_buffers);
421 from = vlib_frame_args (frame);
424 return vlib_error_drop_buffers (vm, node,
426 /* buffer stride */ 1,
428 VNET_INTERFACE_OUTPUT_NEXT_DROP,
430 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
432 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
433 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
434 if (! (si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
435 ! (hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
437 vlib_simple_counter_main_t * cm;
439 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
440 VNET_INTERFACE_COUNTER_TX_ERROR);
441 vlib_increment_simple_counter (cm, cpu_index,
442 rt->sw_if_index, n_buffers);
444 return vlib_error_drop_buffers (vm, node,
446 /* buffer stride */ 1,
448 VNET_INTERFACE_OUTPUT_NEXT_DROP,
450 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
453 from_end = from + n_buffers;
455 /* Total byte count of all buffers. */
459 while (from < from_end)
461 /* Get new next frame since previous incomplete frame may have less
462 than VNET_FRAME_SIZE vectors in it. */
463 vlib_get_new_next_frame (vm, node, next_index,
464 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;
473 /* Prefetch next iteration. */
474 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
475 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
485 b0 = vlib_get_buffer (vm, bi0);
486 b1 = vlib_get_buffer (vm, bi1);
488 /* Be grumpy about zero length buffers for benefit of
489 driver tx function. */
490 ASSERT (b0->current_length > 0);
491 ASSERT (b1->current_length > 0);
493 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
494 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1);
495 tx_swif0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
496 tx_swif1 = vnet_buffer(b1)->sw_if_index[VLIB_TX];
498 n_bytes += n_bytes_b0 + n_bytes_b1;
502 b0->flags |= BUFFER_OUTPUT_FEAT_DONE;
503 vnet_buffer(b0)->output_features.bitmap = si->output_feature_bitmap;
504 count_trailing_zeros(next0, vnet_buffer(b0)->output_features.bitmap);
505 vnet_buffer(b0)->output_features.bitmap &= ~(1 << next0);
509 next0 = VNET_INTERFACE_OUTPUT_NEXT_TX;
510 vnet_buffer(b0)->output_features.bitmap = 0;
512 if (PREDICT_FALSE(tx_swif0 != rt->sw_if_index))
514 /* update vlan subif tx counts, if required */
515 vlib_increment_combined_counter (im->combined_sw_if_counters
516 + VNET_INTERFACE_COUNTER_TX,
526 b1->flags |= BUFFER_OUTPUT_FEAT_DONE;
527 vnet_buffer(b1)->output_features.bitmap = si->output_feature_bitmap;
528 count_trailing_zeros(next1, vnet_buffer(b1)->output_features.bitmap);
529 vnet_buffer(b1)->output_features.bitmap &= ~(1 << next1);
533 next1 = VNET_INTERFACE_OUTPUT_NEXT_TX;
534 vnet_buffer(b1)->output_features.bitmap = 0;
536 /* update vlan subif tx counts, if required */
537 if (PREDICT_FALSE(tx_swif1 != rt->sw_if_index))
540 vlib_increment_combined_counter (im->combined_sw_if_counters
541 + VNET_INTERFACE_COUNTER_TX,
549 vlib_validate_buffer_enqueue_x2(vm, node, next_index, to_tx,
550 n_left_to_tx, bi0, bi1, next0, next1);
553 while (from + 1 <= from_end && n_left_to_tx >= 1)
565 b0 = vlib_get_buffer (vm, bi0);
567 /* Be grumpy about zero length buffers for benefit of
568 driver tx function. */
569 ASSERT (b0->current_length > 0);
571 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
572 tx_swif0 = vnet_buffer(b0)->sw_if_index[VLIB_TX];
573 n_bytes += n_bytes_b0;
579 b0->flags |= BUFFER_OUTPUT_FEAT_DONE;
580 vnet_buffer(b0)->output_features.bitmap = si->output_feature_bitmap;
581 count_trailing_zeros(next0, vnet_buffer(b0)->output_features.bitmap);
582 vnet_buffer(b0)->output_features.bitmap &= ~(1 << next0);
583 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_tx,
584 n_left_to_tx, bi0, next0);
588 vnet_buffer(b0)->output_features.bitmap = 0;
590 if (PREDICT_FALSE(tx_swif0 != rt->sw_if_index))
593 vlib_increment_combined_counter (im->combined_sw_if_counters
594 + VNET_INTERFACE_COUNTER_TX,
603 vlib_put_next_frame (vm, node, next_index,
607 /* Update main interface stats. */
608 vlib_increment_combined_counter (im->combined_sw_if_counters
609 + VNET_INTERFACE_COUNTER_TX,
618 vnet_interface_output_node_no_flatten (vlib_main_t * vm,
619 vlib_node_runtime_t * node,
620 vlib_frame_t * frame)
622 vnet_main_t * vnm = vnet_get_main ();
623 vnet_interface_output_runtime_t * rt = (void *) node->runtime_data;
624 vnet_sw_interface_t * si;
625 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
627 if (PREDICT_FALSE(si->output_feature_bitmap))
629 /* if first pakcet in the frame have BUFFER_OUTPUT_FEAT_DONE flag set
630 then whole frame is arriving from feature node */
632 u32 * from = vlib_frame_args (frame);
633 vlib_buffer_t * b = vlib_get_buffer (vm, from[0]);
635 if ((b->flags & BUFFER_OUTPUT_FEAT_DONE) == 0)
636 return vnet_interface_output_node_no_flatten_inline (vm, node, frame, 1);
638 return vnet_interface_output_node_no_flatten_inline (vm, node, frame, 0);
641 VLIB_NODE_FUNCTION_MULTIARCH_CLONE (vnet_interface_output_node_no_flatten)
642 CLIB_MULTIARCH_SELECT_FN (vnet_interface_output_node_no_flatten)
644 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
646 vnet_per_buffer_interface_output (vlib_main_t * vm,
647 vlib_node_runtime_t * node,
648 vlib_frame_t * frame)
650 vnet_main_t * vnm = vnet_get_main();
651 u32 n_left_to_next, * from, * to_next;
652 u32 n_left_from, next_index;
654 n_left_from = frame->n_vectors;
656 from = vlib_frame_args (frame);
657 next_index = node->cached_next_index;
659 while (n_left_from > 0)
661 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
663 while (n_left_from >= 4 && n_left_to_next >= 2)
665 u32 bi0, bi1, next0, next1;
666 vlib_buffer_t * b0, * b1;
667 vnet_hw_interface_t * hi0, * hi1;
669 /* Prefetch next iteration. */
670 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
671 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
682 b0 = vlib_get_buffer (vm, bi0);
683 b1 = vlib_get_buffer (vm, bi1);
685 hi0 = vnet_get_sup_hw_interface (vnm, vnet_buffer (b0)->sw_if_index[VLIB_TX]);
686 hi1 = vnet_get_sup_hw_interface (vnm, vnet_buffer (b1)->sw_if_index[VLIB_TX]);
688 next0 = hi0->hw_if_index;
689 next1 = hi1->hw_if_index;
691 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, n_left_to_next,
692 bi0, bi1, next0, next1);
695 while (n_left_from > 0 && n_left_to_next > 0)
699 vnet_hw_interface_t * hi0;
708 b0 = vlib_get_buffer (vm, bi0);
710 hi0 = vnet_get_sup_hw_interface (vnm, vnet_buffer (b0)->sw_if_index[VLIB_TX]);
712 next0 = hi0->hw_if_index;
714 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next,
718 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
721 return frame->n_vectors;
725 counter_index (vlib_main_t * vm, vlib_error_t e)
730 ni = vlib_error_get_node (e);
731 n = vlib_get_node (vm, ni);
733 ci = vlib_error_get_code (e);
734 ASSERT (ci < n->n_errors);
736 ci += n->error_heap_index;
741 static u8 * format_vnet_error_trace (u8 * s, va_list * va)
743 vlib_main_t * vm = va_arg (*va, vlib_main_t *);
744 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
745 vlib_error_t * e = va_arg (*va, vlib_error_t *);
746 vlib_node_t * error_node;
747 vlib_error_main_t * em = &vm->error_main;
750 error_node = vlib_get_node (vm, vlib_error_get_node (e[0]));
751 i = counter_index (vm, e[0]);
752 s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]);
758 trace_errors_with_buffers (vlib_main_t * vm,
759 vlib_node_runtime_t * node,
760 vlib_frame_t * frame)
762 u32 n_left, * buffers;
764 buffers = vlib_frame_vector_args (frame);
765 n_left = frame->n_vectors;
770 vlib_buffer_t * b0, * b1;
771 vlib_error_t * t0, * t1;
773 /* Prefetch next iteration. */
774 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
775 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
780 b0 = vlib_get_buffer (vm, bi0);
781 b1 = vlib_get_buffer (vm, bi1);
783 if (b0->flags & VLIB_BUFFER_IS_TRACED)
785 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
788 if (b1->flags & VLIB_BUFFER_IS_TRACED)
790 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
805 b0 = vlib_get_buffer (vm, bi0);
807 if (b0->flags & VLIB_BUFFER_IS_TRACED)
809 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
818 validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index)
820 uword node_index = vlib_error_get_node (e[0]);
821 uword code = vlib_error_get_code (e[0]);
824 if (node_index >= vec_len (vm->node_main.nodes))
825 return format (0, "[%d], node index out of range 0x%x, error 0x%x",
826 index, node_index, e[0]);
828 n = vlib_get_node (vm, node_index);
829 if (code >= n->n_errors)
830 return format (0, "[%d], code %d out of range for node %v",
831 index, code, n->name);
837 validate_error_frame (vlib_main_t * vm,
838 vlib_node_runtime_t * node,
841 u32 * buffers = vlib_frame_args (f);
846 for (i = 0; i < f->n_vectors; i++)
848 b = vlib_get_buffer (vm, buffers[i]);
849 msg = validate_error (vm, &b->error, i);
858 VNET_ERROR_DISPOSITION_DROP,
859 VNET_ERROR_DISPOSITION_PUNT,
860 VNET_ERROR_N_DISPOSITION,
861 } vnet_error_disposition_t;
864 do_packet (vlib_main_t * vm, vlib_error_t a)
866 vlib_error_main_t * em = &vm->error_main;
867 u32 i = counter_index (vm, a);
868 em->counters[i] += 1;
869 vlib_error_elog_count (vm, i, 1);
872 static_always_inline uword
873 process_drop_punt (vlib_main_t * vm,
874 vlib_node_runtime_t * node,
875 vlib_frame_t * frame,
876 vnet_error_disposition_t disposition)
878 vnet_main_t * vnm = vnet_get_main();
879 vlib_error_main_t * em = &vm->error_main;
880 u32 * buffers, * first_buffer;
881 vlib_error_t current_error;
882 u32 current_counter_index, n_errors_left;
883 u32 current_sw_if_index, n_errors_current_sw_if_index;
885 vlib_simple_counter_main_t * cm;
886 u32 cpu_index = vm->cpu_index;
888 static vlib_error_t memory[VNET_ERROR_N_DISPOSITION];
889 static char memory_init[VNET_ERROR_N_DISPOSITION];
891 buffers = vlib_frame_args (frame);
892 first_buffer = buffers;
895 vlib_buffer_t * b = vlib_get_buffer (vm, first_buffer[0]);
897 if (! memory_init[disposition])
899 memory_init[disposition] = 1;
900 memory[disposition] = b->error;
903 current_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
904 n_errors_current_sw_if_index = 0;
907 current_error = memory[disposition];
908 current_counter_index = counter_index (vm, memory[disposition]);
909 current_counter = em->counters[current_counter_index];
911 if (node->flags & VLIB_NODE_FLAG_TRACE)
912 trace_errors_with_buffers (vm, node, frame);
914 n_errors_left = frame->n_vectors;
915 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
916 (disposition == VNET_ERROR_DISPOSITION_PUNT
917 ? VNET_INTERFACE_COUNTER_PUNT
918 : VNET_INTERFACE_COUNTER_DROP));
920 while (n_errors_left >= 2)
922 vlib_buffer_t * b0, * b1;
923 vnet_sw_interface_t * sw_if0, * sw_if1;
926 u32 sw_if_index0, sw_if_index1;
934 b0 = vlib_get_buffer (vm, bi0);
935 b1 = vlib_get_buffer (vm, bi1);
940 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
941 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
943 /* Speculate that sw_if_index == sw_if_index[01]. */
944 n_errors_current_sw_if_index += 2;
946 /* Speculatively assume all 2 (node, code) pairs are equal
947 to current (node, code). */
948 current_counter += 2;
950 if (PREDICT_FALSE (e0 != current_error
951 || e1 != current_error
952 || sw_if_index0 != current_sw_if_index
953 || sw_if_index1 != current_sw_if_index))
955 current_counter -= 2;
956 n_errors_current_sw_if_index -= 2;
958 vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
959 vlib_increment_simple_counter (cm, cpu_index, sw_if_index1, 1);
961 /* Increment super-interface drop/punt counters for
963 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
964 vlib_increment_simple_counter
965 (cm, cpu_index, sw_if0->sup_sw_if_index,
966 sw_if0->sup_sw_if_index != sw_if_index0);
968 sw_if1 = vnet_get_sw_interface (vnm, sw_if_index1);
969 vlib_increment_simple_counter
970 (cm, cpu_index, sw_if1->sup_sw_if_index,
971 sw_if1->sup_sw_if_index != sw_if_index1);
973 em->counters[current_counter_index] = current_counter;
977 /* For 2 repeated errors, change current error. */
978 if (e0 == e1 && e1 != current_error)
981 current_counter_index = counter_index (vm, e0);
983 current_counter = em->counters[current_counter_index];
987 while (n_errors_left >= 1)
990 vnet_sw_interface_t * sw_if0;
992 u32 bi0, sw_if_index0;
998 current_counter += 1;
1000 b0 = vlib_get_buffer (vm, bi0);
1003 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1005 /* Increment drop/punt counters. */
1006 vlib_increment_simple_counter (cm, cpu_index, sw_if_index0, 1);
1008 /* Increment super-interface drop/punt counters for sub-interfaces. */
1009 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
1010 vlib_increment_simple_counter (cm, cpu_index, sw_if0->sup_sw_if_index,
1011 sw_if0->sup_sw_if_index != sw_if_index0);
1013 if (PREDICT_FALSE (e0 != current_error))
1015 current_counter -= 1;
1017 vlib_error_elog_count (vm, current_counter_index,
1019 - em->counters[current_counter_index]));
1021 em->counters[current_counter_index] = current_counter;
1025 current_counter_index = counter_index (vm, e0);
1026 current_counter = em->counters[current_counter_index];
1030 if (n_errors_current_sw_if_index > 0)
1032 vnet_sw_interface_t * si;
1034 vlib_increment_simple_counter (cm, cpu_index, current_sw_if_index,
1035 n_errors_current_sw_if_index);
1037 si = vnet_get_sw_interface (vnm, current_sw_if_index);
1038 if (si->sup_sw_if_index != current_sw_if_index)
1039 vlib_increment_simple_counter (cm, cpu_index, si->sup_sw_if_index,
1040 n_errors_current_sw_if_index);
1043 vlib_error_elog_count (vm, current_counter_index,
1045 - em->counters[current_counter_index]));
1047 /* Return cached counter. */
1048 em->counters[current_counter_index] = current_counter;
1050 /* Save memory for next iteration. */
1051 memory[disposition] = current_error;
1053 if (disposition == VNET_ERROR_DISPOSITION_DROP
1054 || ! vm->os_punt_frame)
1061 /* If there is no punt function, free the frame as well. */
1062 if (disposition == VNET_ERROR_DISPOSITION_PUNT && ! vm->os_punt_frame)
1063 vlib_frame_free (vm, node, frame);
1066 vm->os_punt_frame (vm, node, frame);
1068 return frame->n_vectors;
1072 pcap_drop_trace (vlib_main_t * vm,
1073 vnet_interface_main_t * im,
1077 u32 n_left = f->n_vectors;
1078 vlib_buffer_t * b0, * p1;
1080 i16 save_current_data;
1081 u16 save_current_length;
1083 from = vlib_frame_vector_args (f);
1087 if (PREDICT_TRUE (n_left > 1))
1089 p1 = vlib_get_buffer (vm, from[1]);
1090 vlib_prefetch_buffer_header (p1, LOAD);
1094 b0 = vlib_get_buffer (vm, bi0);
1098 /* See if we're pointedly ignoring this specific error */
1099 if (im->pcap_drop_filter_hash
1100 && hash_get (im->pcap_drop_filter_hash, b0->error))
1103 /* Trace all drops, or drops received on a specific interface */
1104 if (im->pcap_sw_if_index == 0 ||
1105 im->pcap_sw_if_index == vnet_buffer(b0)->sw_if_index [VLIB_RX])
1107 save_current_data = b0->current_data;
1108 save_current_length = b0->current_length;
1111 * Typically, we'll need to rewind the buffer
1113 if (b0->current_data > 0)
1114 vlib_buffer_advance (b0, (word) -b0->current_data);
1116 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1118 b0->current_data = save_current_data;
1119 b0->current_length = save_current_length;
1124 void vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1126 vnet_interface_main_t * im = &vnet_get_main()->interface_main;
1128 if (im->pcap_drop_filter_hash == 0)
1129 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1132 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1134 hash_unset (im->pcap_drop_filter_hash, error_index);
1138 process_drop (vlib_main_t * vm,
1139 vlib_node_runtime_t * node,
1140 vlib_frame_t * frame)
1142 vnet_interface_main_t * im = &vnet_get_main()->interface_main;
1144 if (PREDICT_FALSE (im->drop_pcap_enable))
1145 pcap_drop_trace (vm, im, frame);
1147 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1151 process_punt (vlib_main_t * vm,
1152 vlib_node_runtime_t * node,
1153 vlib_frame_t * frame)
1155 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1158 VLIB_REGISTER_NODE (drop_buffers,static) = {
1159 .function = process_drop,
1160 .name = "error-drop",
1161 .flags = VLIB_NODE_FLAG_IS_DROP,
1162 .vector_size = sizeof (u32),
1163 .format_trace = format_vnet_error_trace,
1164 .validate_frame = validate_error_frame,
1167 VLIB_NODE_FUNCTION_MULTIARCH (drop_buffers, process_drop)
1169 VLIB_REGISTER_NODE (punt_buffers,static) = {
1170 .function = process_punt,
1171 .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH
1172 | VLIB_NODE_FLAG_IS_PUNT),
1173 .name = "error-punt",
1174 .vector_size = sizeof (u32),
1175 .format_trace = format_vnet_error_trace,
1176 .validate_frame = validate_error_frame,
1179 VLIB_NODE_FUNCTION_MULTIARCH (punt_buffers, process_punt)
1181 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = {
1182 .function = vnet_per_buffer_interface_output,
1183 .name = "interface-output",
1184 .vector_size = sizeof (u32),
1187 VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node, vnet_per_buffer_interface_output)
1190 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1194 vnet_hw_interface_t * hi = vnet_get_hw_interface (vnm, hw_if_index);
1197 next_index = vlib_node_add_next_with_slot
1198 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1199 hi->output_node_index,
1200 /* next_index */ hw_if_index);
1202 ASSERT (next_index == hw_if_index);
1207 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1208 (vnet_per_buffer_interface_output_hw_interface_add_del);
1210 static clib_error_t *
1211 pcap_drop_trace_command_fn (vlib_main_t * vm,
1212 unformat_input_t * input,
1213 vlib_cli_command_t * cmd)
1215 vnet_main_t * vnm = vnet_get_main();
1216 vnet_interface_main_t * im = &vnm->interface_main;
1220 clib_error_t * error = 0;
1222 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1224 if (unformat (input, "on"))
1226 if (im->drop_pcap_enable == 0)
1228 if (im->pcap_filename == 0)
1229 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1231 memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1232 im->pcap_main.file_name = (char *) im->pcap_filename;
1233 im->pcap_main.n_packets_to_capture = 100;
1234 if (im->pcap_pkts_to_capture)
1235 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1237 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1238 im->drop_pcap_enable = 1;
1240 vlib_cli_output (vm, "pcap drop capture on...");
1244 vlib_cli_output (vm, "pcap drop capture already on...");
1248 else if (unformat (input, "off"))
1252 if (im->drop_pcap_enable)
1254 vlib_cli_output (vm, "captured %d pkts...",
1255 im->pcap_main.n_packets_captured);
1256 if (im->pcap_main.n_packets_captured)
1258 im->pcap_main.n_packets_to_capture =
1259 im->pcap_main.n_packets_captured;
1260 error = pcap_write (&im->pcap_main);
1262 clib_error_report (error);
1264 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1269 vlib_cli_output (vm, "pcap drop capture already off...");
1272 im->drop_pcap_enable = 0;
1274 else if (unformat (input, "max %d", &max))
1276 im->pcap_pkts_to_capture = max;
1280 else if (unformat (input, "intfc %U",
1281 unformat_vnet_sw_interface, vnm,
1282 &im->pcap_sw_if_index))
1284 else if (unformat (input, "intfc any"))
1286 im->pcap_sw_if_index = 0;
1289 else if (unformat (input, "file %s", &filename))
1291 u8 * chroot_filename;
1292 /* Brain-police user path input */
1293 if (strstr((char *)filename, "..") || index((char *)filename, '/'))
1295 vlib_cli_output (vm, "illegal characters in filename '%s'",
1300 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1301 vec_free (filename);
1303 if (im->pcap_filename)
1304 vec_free (im->pcap_filename);
1305 vec_add1 (filename, 0);
1306 im->pcap_filename = chroot_filename;
1309 else if (unformat (input, "status"))
1311 if (im->drop_pcap_enable == 0)
1313 vlib_cli_output (vm, "pcap drop capture is off...");
1317 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1318 im->pcap_main.n_packets_captured,
1319 im->pcap_main.n_packets_to_capture);
1328 return clib_error_return (0, "unknown input `%U'",
1329 format_unformat_error, input);
1334 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1335 .path = "pcap drop trace",
1337 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1338 .function = pcap_drop_trace_command_fn,