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/ip/icmp46_packet.h>
42 #include <vnet/ethernet/packet.h>
43 #include <vnet/ip/format.h>
44 #include <vnet/ip/ip4.h>
45 #include <vnet/ip/ip6.h>
46 #include <vnet/udp/udp_packet.h>
47 #include <vnet/feature/feature.h>
48 #include <vnet/classify/trace_classify.h>
49 #include <vnet/interface_output.h>
55 u8 data[128 - 2 * sizeof (u32)];
57 interface_output_trace_t;
59 #ifndef CLIB_MARCH_VARIANT
61 format_vnet_interface_output_trace (u8 * s, va_list * va)
63 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
64 vlib_node_t *node = va_arg (*va, vlib_node_t *);
65 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
66 vnet_main_t *vnm = vnet_get_main ();
67 vnet_sw_interface_t *si;
70 if (t->sw_if_index != (u32) ~ 0)
72 indent = format_get_indent (s);
74 if (pool_is_free_index
75 (vnm->interface_main.sw_interfaces, t->sw_if_index))
77 /* the interface may have been deleted by the time the trace is printed */
78 s = format (s, "sw_if_index: %d ", t->sw_if_index);
82 si = vnet_get_sw_interface (vnm, t->sw_if_index);
84 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
88 format (s, "\n%U%U", format_white_space, indent,
89 node->format_buffer ? node->format_buffer : format_hex_bytes,
90 t->data, sizeof (t->data));
94 #endif /* CLIB_MARCH_VARIANT */
97 vnet_interface_output_trace (vlib_main_t * vm,
98 vlib_node_runtime_t * node,
99 vlib_frame_t * frame, uword n_buffers)
104 from = vlib_frame_vector_args (frame);
109 vlib_buffer_t *b0, *b1;
110 interface_output_trace_t *t0, *t1;
112 /* Prefetch next iteration. */
113 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
114 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
119 b0 = vlib_get_buffer (vm, bi0);
120 b1 = vlib_get_buffer (vm, bi1);
122 if (b0->flags & VLIB_BUFFER_IS_TRACED)
124 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
125 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
126 t0->flags = b0->flags;
127 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
130 if (b1->flags & VLIB_BUFFER_IS_TRACED)
132 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
133 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
134 t1->flags = b1->flags;
135 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
146 interface_output_trace_t *t0;
150 b0 = vlib_get_buffer (vm, bi0);
152 if (b0->flags & VLIB_BUFFER_IS_TRACED)
154 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
155 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
156 t0->flags = b0->flags;
157 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
165 static_always_inline uword
166 vnet_interface_output_node_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
167 vlib_frame_t *frame, vnet_main_t *vnm,
168 vlib_buffer_t **b, int do_tx_offloads)
170 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
171 u32 n_left_to_tx, *from, *from_end, *to_tx;
172 u32 n_bytes, n_buffers, n_packets;
173 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
174 u32 thread_index = vm->thread_index;
175 vnet_interface_main_t *im = &vnm->interface_main;
176 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
177 u32 current_config_index = ~0;
178 u8 arc = im->output_feature_arc_index;
180 n_buffers = frame->n_vectors;
182 from = vlib_frame_vector_args (frame);
184 from_end = from + n_buffers;
186 /* Total byte count of all buffers. */
190 /* interface-output feature arc handling */
191 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
193 vnet_feature_config_main_t *fcm;
194 fcm = vnet_feature_get_config_main (arc);
195 current_config_index = vnet_get_feature_config_index (arc,
197 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
201 while (from < from_end)
203 /* Get new next frame since previous incomplete frame may have less
204 than VNET_FRAME_SIZE vectors in it. */
205 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
207 while (from + 8 <= from_end && n_left_to_tx >= 4)
209 u32 bi0, bi1, bi2, bi3;
210 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
213 /* Prefetch next iteration. */
214 vlib_prefetch_buffer_header (b[4], LOAD);
215 vlib_prefetch_buffer_header (b[5], LOAD);
216 vlib_prefetch_buffer_header (b[6], LOAD);
217 vlib_prefetch_buffer_header (b[7], LOAD);
228 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
234 /* Be grumpy about zero length buffers for benefit of
235 driver tx function. */
236 ASSERT (b[0]->current_length > 0);
237 ASSERT (b[1]->current_length > 0);
238 ASSERT (b[2]->current_length > 0);
239 ASSERT (b[3]->current_length > 0);
241 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
242 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
243 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
244 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
245 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
246 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
247 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
248 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
250 n_bytes += n_bytes_b0 + n_bytes_b1;
251 n_bytes += n_bytes_b2 + n_bytes_b3;
254 if (PREDICT_FALSE (current_config_index != ~0))
256 vnet_buffer (b[0])->feature_arc_index = arc;
257 vnet_buffer (b[1])->feature_arc_index = arc;
258 vnet_buffer (b[2])->feature_arc_index = arc;
259 vnet_buffer (b[3])->feature_arc_index = arc;
260 b[0]->current_config_index = current_config_index;
261 b[1]->current_config_index = current_config_index;
262 b[2]->current_config_index = current_config_index;
263 b[3]->current_config_index = current_config_index;
266 /* update vlan subif tx counts, if required */
267 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
269 vlib_increment_combined_counter (im->combined_sw_if_counters +
270 VNET_INTERFACE_COUNTER_TX,
271 thread_index, tx_swif0, 1,
275 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
278 vlib_increment_combined_counter (im->combined_sw_if_counters +
279 VNET_INTERFACE_COUNTER_TX,
280 thread_index, tx_swif1, 1,
284 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
287 vlib_increment_combined_counter (im->combined_sw_if_counters +
288 VNET_INTERFACE_COUNTER_TX,
289 thread_index, tx_swif2, 1,
292 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
295 vlib_increment_combined_counter (im->combined_sw_if_counters +
296 VNET_INTERFACE_COUNTER_TX,
297 thread_index, tx_swif3, 1,
303 if (or_flags & VNET_BUFFER_F_OFFLOAD)
305 if (b[0]->flags & VNET_BUFFER_F_OFFLOAD)
306 vnet_calc_checksums_inline
308 b[0]->flags & VNET_BUFFER_F_IS_IP4,
309 b[0]->flags & VNET_BUFFER_F_IS_IP6);
310 if (b[1]->flags & VNET_BUFFER_F_OFFLOAD)
311 vnet_calc_checksums_inline
313 b[1]->flags & VNET_BUFFER_F_IS_IP4,
314 b[1]->flags & VNET_BUFFER_F_IS_IP6);
315 if (b[2]->flags & VNET_BUFFER_F_OFFLOAD)
316 vnet_calc_checksums_inline
318 b[2]->flags & VNET_BUFFER_F_IS_IP4,
319 b[2]->flags & VNET_BUFFER_F_IS_IP6);
320 if (b[3]->flags & VNET_BUFFER_F_OFFLOAD)
321 vnet_calc_checksums_inline
323 b[3]->flags & VNET_BUFFER_F_IS_IP4,
324 b[3]->flags & VNET_BUFFER_F_IS_IP6);
331 while (from + 1 <= from_end && n_left_to_tx >= 1)
342 /* Be grumpy about zero length buffers for benefit of
343 driver tx function. */
344 ASSERT (b[0]->current_length > 0);
346 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
347 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
348 n_bytes += n_bytes_b0;
351 if (PREDICT_FALSE (current_config_index != ~0))
353 vnet_buffer (b[0])->feature_arc_index = arc;
354 b[0]->current_config_index = current_config_index;
357 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
360 vlib_increment_combined_counter (im->combined_sw_if_counters +
361 VNET_INTERFACE_COUNTER_TX,
362 thread_index, tx_swif0, 1,
368 if (b[0]->flags & VNET_BUFFER_F_OFFLOAD)
369 vnet_calc_checksums_inline
371 b[0]->flags & VNET_BUFFER_F_IS_IP4,
372 b[0]->flags & VNET_BUFFER_F_IS_IP6);
377 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
380 /* Update main interface stats. */
381 vlib_increment_combined_counter (im->combined_sw_if_counters
382 + VNET_INTERFACE_COUNTER_TX,
384 rt->sw_if_index, n_packets, n_bytes);
388 static_always_inline void vnet_interface_pcap_tx_trace
389 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
390 int sw_if_index_from_buffer)
392 vnet_main_t *vnm = vnet_get_main ();
393 u32 n_left_from, *from;
395 vnet_pcap_t *pp = &vnm->pcap;
397 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
400 if (sw_if_index_from_buffer == 0)
402 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
403 sw_if_index = rt->sw_if_index;
408 n_left_from = frame->n_vectors;
409 from = vlib_frame_vector_args (frame);
411 while (n_left_from > 0)
413 int classify_filter_result;
415 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
419 if (pp->filter_classify_table_index != ~0)
421 classify_filter_result =
422 vnet_is_packet_traced_inline
423 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
424 if (classify_filter_result)
425 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
429 if (sw_if_index_from_buffer)
430 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
432 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
434 vnet_main_t *vnm = vnet_get_main ();
435 vnet_hw_interface_t *hi =
436 vnet_get_sup_hw_interface (vnm, sw_if_index);
437 /* Capture pkt if not filtered, or if filter hits */
438 if (hi->trace_classify_table_index == ~0 ||
439 vnet_is_packet_traced_inline
440 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
441 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
446 VLIB_NODE_FN (vnet_interface_output_node)
447 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
449 vnet_main_t *vnm = vnet_get_main ();
450 vnet_hw_interface_t *hi;
451 vnet_sw_interface_t *si;
452 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
453 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
454 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
455 u32 n_buffers = frame->n_vectors;
458 if (node->flags & VLIB_NODE_FLAG_TRACE)
459 vnet_interface_output_trace (vm, node, frame, n_buffers);
461 from = vlib_frame_vector_args (frame);
464 return vlib_error_drop_buffers (
466 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
467 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
469 vnet_interface_pcap_tx_trace (vm, node, frame,
470 0 /* sw_if_index_from_buffer */ );
472 vlib_get_buffers (vm, from, bufs, n_buffers);
474 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
475 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
477 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
478 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
480 vlib_simple_counter_main_t *cm;
482 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
483 VNET_INTERFACE_COUNTER_TX_ERROR);
484 vlib_increment_simple_counter (cm, vm->thread_index, rt->sw_if_index,
487 return vlib_error_drop_buffers (
489 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
490 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
493 if (hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM)
494 return vnet_interface_output_node_inline (vm, node, frame, vnm, bufs,
495 /* do_tx_offloads */ 0);
497 return vnet_interface_output_node_inline (vm, node, frame, vnm, bufs,
498 /* do_tx_offloads */ 1);
501 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
502 .name = "interface-output-template",
503 .vector_size = sizeof (u32),
506 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
507 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
508 vlib_node_runtime_t *
510 vlib_frame_t * frame)
512 vnet_main_t *vnm = vnet_get_main ();
513 u32 n_left_to_next, *from, *to_next;
514 u32 n_left_from, next_index;
516 vnet_interface_pcap_tx_trace (vm, node, frame,
517 1 /* sw_if_index_from_buffer */ );
519 n_left_from = frame->n_vectors;
521 from = vlib_frame_vector_args (frame);
522 next_index = node->cached_next_index;
524 while (n_left_from > 0)
526 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
528 while (n_left_from >= 4 && n_left_to_next >= 2)
530 u32 bi0, bi1, next0, next1;
531 vlib_buffer_t *b0, *b1;
532 vnet_hw_interface_t *hi0, *hi1;
534 /* Prefetch next iteration. */
535 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
536 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
547 b0 = vlib_get_buffer (vm, bi0);
548 b1 = vlib_get_buffer (vm, bi1);
551 vnet_get_sup_hw_interface (vnm,
552 vnet_buffer (b0)->sw_if_index
555 vnet_get_sup_hw_interface (vnm,
556 vnet_buffer (b1)->sw_if_index
559 next0 = hi0->output_node_next_index;
560 next1 = hi1->output_node_next_index;
562 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
563 n_left_to_next, bi0, bi1, next0,
567 while (n_left_from > 0 && n_left_to_next > 0)
571 vnet_hw_interface_t *hi0;
580 b0 = vlib_get_buffer (vm, bi0);
583 vnet_get_sup_hw_interface (vnm,
584 vnet_buffer (b0)->sw_if_index
587 next0 = hi0->output_node_next_index;
589 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
590 n_left_to_next, bi0, next0);
593 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
596 return frame->n_vectors;
599 typedef struct vnet_error_trace_t_
606 ip46_address_t src, dst;
607 } vnet_error_trace_t;
610 format_vnet_error_trace (u8 * s, va_list * va)
612 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
613 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
614 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
616 /* Normal, non-catchup trace */
617 if (t->details_valid == 0)
619 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
620 vnet_get_main (), t->sw_if_index);
622 else if (t->details_valid == 1)
624 /* The trace capture code didn't understant the mactype */
625 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
627 else if (t->details_valid == 2)
629 /* Dump the src/dst addresses */
631 s = format (s, "IP4: %U -> %U",
632 format_ip4_address, &t->src.ip4,
633 format_ip4_address, &t->dst.ip4);
635 s = format (s, "IP6: %U -> %U",
636 format_ip6_address, &t->src.ip6,
637 format_ip6_address, &t->dst.ip6);
643 interface_trace_buffers (vlib_main_t * vm,
644 vlib_node_runtime_t * node, vlib_frame_t * frame)
646 u32 n_left, *buffers;
648 buffers = vlib_frame_vector_args (frame);
649 n_left = frame->n_vectors;
654 vlib_buffer_t *b0, *b1;
655 vnet_error_trace_t *t0, *t1;
657 /* Prefetch next iteration. */
658 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
659 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
664 b0 = vlib_get_buffer (vm, bi0);
665 b1 = vlib_get_buffer (vm, bi1);
667 if (b0->flags & VLIB_BUFFER_IS_TRACED)
669 t0 = vlib_add_trace (vm, node, b0,
670 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
671 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
672 t0->details_valid = 0;
674 if (b1->flags & VLIB_BUFFER_IS_TRACED)
676 t1 = vlib_add_trace (vm, node, b1,
677 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
678 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
679 t1->details_valid = 0;
689 vnet_error_trace_t *t0;
693 b0 = vlib_get_buffer (vm, bi0);
695 if (b0->flags & VLIB_BUFFER_IS_TRACED)
697 t0 = vlib_add_trace (vm, node, b0,
698 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
699 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
700 t0->details_valid = 0;
709 VNET_ERROR_DISPOSITION_DROP,
710 VNET_ERROR_DISPOSITION_PUNT,
711 VNET_ERROR_N_DISPOSITION,
712 } vnet_error_disposition_t;
715 drop_catchup_trace (vlib_main_t * vm,
716 vlib_node_runtime_t * node, vlib_buffer_t * b)
718 /* Can we safely rewind the buffer? If not, fagedaboudit */
719 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
721 vnet_error_trace_t *t;
724 ethernet_header_t *eh;
727 t = vlib_add_trace (vm, node, b, sizeof (*t));
728 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
729 vlib_buffer_advance (b, delta);
731 eh = vlib_buffer_get_current (b);
733 t->mactype = clib_net_to_host_u16 (eh->type);
734 t->details_valid = 1;
737 case ETHERNET_TYPE_IP4:
738 ip4 = (void *) (eh + 1);
739 t->details_valid = 2;
741 t->src.ip4.as_u32 = ip4->src_address.as_u32;
742 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
745 case ETHERNET_TYPE_IP6:
746 ip6 = (void *) (eh + 1);
747 t->details_valid = 2;
749 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
750 sizeof (ip6_address_t));
751 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
752 sizeof (ip6_address_t));
756 /* Dunno, do nothing, leave details_valid alone */
759 /* Restore current data (probably unnecessary) */
760 vlib_buffer_advance (b, -delta);
764 static_always_inline uword
765 interface_drop_punt (vlib_main_t * vm,
766 vlib_node_runtime_t * node,
767 vlib_frame_t * frame,
768 vnet_error_disposition_t disposition)
770 u32 *from, n_left, thread_index, *sw_if_index;
771 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
772 u32 sw_if_indices[VLIB_FRAME_SIZE];
773 vlib_simple_counter_main_t *cm;
774 u16 nexts[VLIB_FRAME_SIZE];
778 vnm = vnet_get_main ();
779 thread_index = vm->thread_index;
780 from = vlib_frame_vector_args (frame);
781 n_left = frame->n_vectors;
783 sw_if_index = sw_if_indices;
785 vlib_get_buffers (vm, from, bufs, n_left);
787 /* "trace add error-drop NNN?" */
788 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
790 /* If pkts aren't otherwise traced... */
791 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
793 /* Trace them from here */
794 node->flags |= VLIB_NODE_FLAG_TRACE;
795 while (n_trace && n_left)
798 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
799 0 /* follow chain */ )))
802 * Here we have a wireshark dissector problem.
803 * Packets may be well-formed, or not. We
804 * must not blow chunks in any case.
806 * Try to produce trace records which will help
807 * folks understand what's going on.
809 drop_catchup_trace (vm, node, b[0]);
817 vlib_set_trace_count (vm, node, n_trace);
819 n_left = frame->n_vectors;
822 if (node->flags & VLIB_NODE_FLAG_TRACE)
823 interface_trace_buffers (vm, node, frame);
825 /* All going to drop regardless, this is just a counting exercise */
826 clib_memset (nexts, 0, sizeof (nexts));
828 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
829 (disposition == VNET_ERROR_DISPOSITION_PUNT
830 ? VNET_INTERFACE_COUNTER_PUNT
831 : VNET_INTERFACE_COUNTER_DROP));
833 /* collect the array of interfaces first ... */
838 /* Prefetch 8 ahead - there's not much going on in each iteration */
839 vlib_prefetch_buffer_header (b[4], LOAD);
840 vlib_prefetch_buffer_header (b[5], LOAD);
841 vlib_prefetch_buffer_header (b[6], LOAD);
842 vlib_prefetch_buffer_header (b[7], LOAD);
844 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
845 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
846 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
847 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
855 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
862 /* ... then count against them in blocks */
863 n_left = frame->n_vectors;
867 vnet_sw_interface_t *sw_if0;
870 off = frame->n_vectors - n_left;
872 sw_if_index = sw_if_indices + off;
874 count = clib_count_equal_u32 (sw_if_index, n_left);
877 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
879 /* Increment super-interface drop/punt counters for
881 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
882 if (sw_if0->sup_sw_if_index != sw_if_index[0])
883 vlib_increment_simple_counter
884 (cm, thread_index, sw_if0->sup_sw_if_index, count);
887 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
889 return frame->n_vectors;
893 pcap_drop_trace (vlib_main_t * vm,
894 vnet_interface_main_t * im,
895 vnet_pcap_t * pp, vlib_frame_t * f)
898 u32 n_left = f->n_vectors;
899 vlib_buffer_t *b0, *p1;
901 i16 save_current_data;
902 u16 save_current_length;
903 vlib_error_main_t *em = &vm->error_main;
907 from = vlib_frame_vector_args (f);
911 if (PREDICT_TRUE (n_left > 1))
913 p1 = vlib_get_buffer (vm, from[1]);
914 vlib_prefetch_buffer_header (p1, LOAD);
918 b0 = vlib_get_buffer (vm, bi0);
922 /* See if we're pointedly ignoring this specific error */
923 if (im->pcap_drop_filter_hash
924 && hash_get (im->pcap_drop_filter_hash, b0->error))
927 do_trace = (pp->pcap_sw_if_index == 0) ||
928 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
931 (do_trace == 0 && pp->filter_classify_table_index != ~0))
933 do_trace = vnet_is_packet_traced_inline
934 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
937 /* Trace all drops, or drops received on a specific interface */
940 save_current_data = b0->current_data;
941 save_current_length = b0->current_length;
944 * Typically, we'll need to rewind the buffer
945 * if l2_hdr_offset is valid, make sure to rewind to the start of
946 * the L2 header. This may not be the buffer start in case we pop-ed
948 * Otherwise, rewind to buffer start and hope for the best.
950 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
952 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
953 vlib_buffer_advance (b0,
954 vnet_buffer (b0)->l2_hdr_offset -
957 else if (b0->current_data > 0)
958 vlib_buffer_advance (b0, (word) - b0->current_data);
961 vlib_buffer_t *last = b0;
962 u32 error_node_index;
965 /* Length of the error string */
966 int error_string_len =
967 clib_strnlen (em->counters_heap[b0->error].name, 128);
969 /* Dig up the drop node */
970 error_node_index = vm->node_main.node_by_error[b0->error];
971 n = vlib_get_node (vm, error_node_index);
973 /* Length of full drop string, w/ "nodename: " prepended */
974 drop_string_len = error_string_len + vec_len (n->name) + 2;
976 /* Find the last buffer in the chain */
977 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
978 last = vlib_get_buffer (vm, last->next_buffer);
981 * Append <nodename>: <error-string> to the capture,
982 * only if we can do that without allocating a new buffer.
984 if (PREDICT_TRUE ((last->current_data + last->current_length)
985 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
988 clib_memcpy_fast (last->data + last->current_data +
989 last->current_length, n->name,
991 clib_memcpy_fast (last->data + last->current_data +
992 last->current_length + vec_len (n->name),
994 clib_memcpy_fast (last->data + last->current_data +
995 last->current_length + vec_len (n->name) +
996 2, em->counters_heap[b0->error].name,
998 last->current_length += drop_string_len;
999 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1000 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1001 pp->max_bytes_per_pkt);
1002 last->current_length -= drop_string_len;
1003 b0->current_data = save_current_data;
1004 b0->current_length = save_current_length;
1010 * Didn't have space in the last buffer, here's the dropped
1013 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1015 b0->current_data = save_current_data;
1016 b0->current_length = save_current_length;
1021 #ifndef CLIB_MARCH_VARIANT
1023 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1025 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1027 if (im->pcap_drop_filter_hash == 0)
1028 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1031 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1033 hash_unset (im->pcap_drop_filter_hash, error_index);
1035 #endif /* CLIB_MARCH_VARIANT */
1037 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1038 vlib_node_runtime_t * node,
1039 vlib_frame_t * frame)
1041 vnet_main_t *vnm = vnet_get_main ();
1042 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1043 vnet_pcap_t *pp = &vnm->pcap;
1045 if (PREDICT_FALSE (pp->pcap_drop_enable))
1046 pcap_drop_trace (vm, im, pp, frame);
1048 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1051 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1052 vlib_node_runtime_t * node,
1053 vlib_frame_t * frame)
1055 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1059 VLIB_REGISTER_NODE (interface_drop) = {
1060 .name = "error-drop",
1061 .vector_size = sizeof (u32),
1062 .format_trace = format_vnet_error_trace,
1063 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1072 VLIB_REGISTER_NODE (interface_punt) = {
1073 .name = "error-punt",
1074 .vector_size = sizeof (u32),
1075 .format_trace = format_vnet_error_trace,
1076 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1085 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1086 .name = "interface-output",
1087 .vector_size = sizeof (u32),
1092 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1093 vlib_frame_t * from_frame)
1095 vnet_main_t *vnm = vnet_get_main ();
1096 u32 last_sw_if_index = ~0;
1097 vlib_frame_t *to_frame = 0;
1098 vnet_hw_interface_t *hw = 0;
1099 u32 *from, *to_next = 0;
1102 from = vlib_frame_vector_args (from_frame);
1103 n_left_from = from_frame->n_vectors;
1104 while (n_left_from > 0)
1113 b0 = vlib_get_buffer (vm, bi0);
1114 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1116 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1120 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1121 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1123 last_sw_if_index = sw_if_index0;
1124 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1125 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1126 to_next = vlib_frame_vector_args (to_frame);
1131 to_frame->n_vectors++;
1133 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1134 return from_frame->n_vectors;
1138 VLIB_REGISTER_NODE (interface_tx) = {
1139 .function = interface_tx_node_fn,
1140 .name = "interface-tx",
1141 .vector_size = sizeof (u32),
1148 VNET_FEATURE_ARC_INIT (interface_output, static) =
1150 .arc_name = "interface-output",
1151 .start_nodes = VNET_FEATURES (0),
1152 .last_in_arc = "interface-tx",
1153 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1156 VNET_FEATURE_INIT (span_tx, static) = {
1157 .arc_name = "interface-output",
1158 .node_name = "span-output",
1159 .runs_before = VNET_FEATURES ("interface-tx"),
1162 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1163 .arc_name = "interface-output",
1164 .node_name = "ipsec-if-output",
1165 .runs_before = VNET_FEATURES ("interface-tx"),
1168 VNET_FEATURE_INIT (interface_tx, static) = {
1169 .arc_name = "interface-output",
1170 .node_name = "interface-tx",
1175 #ifndef CLIB_MARCH_VARIANT
1177 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1181 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1184 if (hi->output_node_index == 0)
1187 next_index = vlib_node_add_next
1188 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1189 hi->output_node_index);
1190 hi->output_node_next_index = next_index;
1195 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1196 (vnet_per_buffer_interface_output_hw_interface_add_del);
1199 vnet_set_interface_output_node (vnet_main_t * vnm,
1200 u32 hw_if_index, u32 node_index)
1202 ASSERT (node_index);
1203 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1204 u32 next_index = vlib_node_add_next
1205 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1206 hi->output_node_next_index = next_index;
1207 hi->output_node_index = node_index;
1209 #endif /* CLIB_MARCH_VARIANT */
1212 * fd.io coding-style-patch-verification: ON
1215 * eval: (c-set-style "gnu")