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));
96 vnet_interface_output_trace (vlib_main_t * vm,
97 vlib_node_runtime_t * node,
98 vlib_frame_t * frame, uword n_buffers)
103 from = vlib_frame_vector_args (frame);
108 vlib_buffer_t *b0, *b1;
109 interface_output_trace_t *t0, *t1;
111 /* Prefetch next iteration. */
112 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
113 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
118 b0 = vlib_get_buffer (vm, bi0);
119 b1 = vlib_get_buffer (vm, bi1);
121 if (b0->flags & VLIB_BUFFER_IS_TRACED)
123 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
124 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
125 t0->flags = b0->flags;
126 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
129 if (b1->flags & VLIB_BUFFER_IS_TRACED)
131 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
132 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
133 t1->flags = b1->flags;
134 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
145 interface_output_trace_t *t0;
149 b0 = vlib_get_buffer (vm, bi0);
151 if (b0->flags & VLIB_BUFFER_IS_TRACED)
153 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
154 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
155 t0->flags = b0->flags;
156 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
164 static_always_inline uword
165 vnet_interface_output_node_inline (vlib_main_t * vm,
166 vlib_node_runtime_t * node,
167 vlib_frame_t * frame,
169 vnet_hw_interface_t * hi,
172 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
173 vnet_sw_interface_t *si;
174 u32 n_left_to_tx, *from, *from_end, *to_tx;
175 u32 n_bytes, n_buffers, n_packets;
176 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
177 u32 thread_index = vm->thread_index;
178 vnet_interface_main_t *im = &vnm->interface_main;
179 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
180 u32 current_config_index = ~0;
181 u8 arc = im->output_feature_arc_index;
182 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
184 n_buffers = frame->n_vectors;
186 if (node->flags & VLIB_NODE_FLAG_TRACE)
187 vnet_interface_output_trace (vm, node, frame, n_buffers);
189 from = vlib_frame_vector_args (frame);
190 vlib_get_buffers (vm, from, b, n_buffers);
193 return vlib_error_drop_buffers (vm, node, from,
194 /* buffer stride */ 1,
196 VNET_INTERFACE_OUTPUT_NEXT_DROP,
198 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
200 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
201 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
202 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
203 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
205 vlib_simple_counter_main_t *cm;
207 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
208 VNET_INTERFACE_COUNTER_TX_ERROR);
209 vlib_increment_simple_counter (cm, thread_index,
210 rt->sw_if_index, n_buffers);
212 return vlib_error_drop_buffers (vm, node, from,
213 /* buffer stride */ 1,
215 VNET_INTERFACE_OUTPUT_NEXT_DROP,
217 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
220 from_end = from + n_buffers;
222 /* Total byte count of all buffers. */
226 /* interface-output feature arc handling */
227 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
229 vnet_feature_config_main_t *fcm;
230 fcm = vnet_feature_get_config_main (arc);
231 current_config_index = vnet_get_feature_config_index (arc,
233 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
237 while (from < from_end)
239 /* Get new next frame since previous incomplete frame may have less
240 than VNET_FRAME_SIZE vectors in it. */
241 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
243 while (from + 8 <= from_end && n_left_to_tx >= 4)
245 u32 bi0, bi1, bi2, bi3;
246 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
249 /* Prefetch next iteration. */
250 vlib_prefetch_buffer_header (b[4], LOAD);
251 vlib_prefetch_buffer_header (b[5], LOAD);
252 vlib_prefetch_buffer_header (b[6], LOAD);
253 vlib_prefetch_buffer_header (b[7], LOAD);
264 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
270 /* Be grumpy about zero length buffers for benefit of
271 driver tx function. */
272 ASSERT (b[0]->current_length > 0);
273 ASSERT (b[1]->current_length > 0);
274 ASSERT (b[2]->current_length > 0);
275 ASSERT (b[3]->current_length > 0);
277 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
278 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
279 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
280 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
281 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
282 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
283 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
284 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
286 n_bytes += n_bytes_b0 + n_bytes_b1;
287 n_bytes += n_bytes_b2 + n_bytes_b3;
290 if (PREDICT_FALSE (current_config_index != ~0))
292 vnet_buffer (b[0])->feature_arc_index = arc;
293 vnet_buffer (b[1])->feature_arc_index = arc;
294 vnet_buffer (b[2])->feature_arc_index = arc;
295 vnet_buffer (b[3])->feature_arc_index = arc;
296 b[0]->current_config_index = current_config_index;
297 b[1]->current_config_index = current_config_index;
298 b[2]->current_config_index = current_config_index;
299 b[3]->current_config_index = current_config_index;
302 /* update vlan subif tx counts, if required */
303 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
305 vlib_increment_combined_counter (im->combined_sw_if_counters +
306 VNET_INTERFACE_COUNTER_TX,
307 thread_index, tx_swif0, 1,
311 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
314 vlib_increment_combined_counter (im->combined_sw_if_counters +
315 VNET_INTERFACE_COUNTER_TX,
316 thread_index, tx_swif1, 1,
320 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
323 vlib_increment_combined_counter (im->combined_sw_if_counters +
324 VNET_INTERFACE_COUNTER_TX,
325 thread_index, tx_swif2, 1,
328 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
331 vlib_increment_combined_counter (im->combined_sw_if_counters +
332 VNET_INTERFACE_COUNTER_TX,
333 thread_index, tx_swif3, 1,
339 u32 vnet_buffer_offload_flags =
340 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
341 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
342 VNET_BUFFER_F_OFFLOAD_IP_CKSUM);
343 if (or_flags & vnet_buffer_offload_flags)
345 if (b[0]->flags & vnet_buffer_offload_flags)
346 vnet_calc_checksums_inline
348 b[0]->flags & VNET_BUFFER_F_IS_IP4,
349 b[0]->flags & VNET_BUFFER_F_IS_IP6);
350 if (b[1]->flags & vnet_buffer_offload_flags)
351 vnet_calc_checksums_inline
353 b[1]->flags & VNET_BUFFER_F_IS_IP4,
354 b[1]->flags & VNET_BUFFER_F_IS_IP6);
355 if (b[2]->flags & vnet_buffer_offload_flags)
356 vnet_calc_checksums_inline
358 b[2]->flags & VNET_BUFFER_F_IS_IP4,
359 b[2]->flags & VNET_BUFFER_F_IS_IP6);
360 if (b[3]->flags & vnet_buffer_offload_flags)
361 vnet_calc_checksums_inline
363 b[3]->flags & VNET_BUFFER_F_IS_IP4,
364 b[3]->flags & VNET_BUFFER_F_IS_IP6);
371 while (from + 1 <= from_end && n_left_to_tx >= 1)
382 /* Be grumpy about zero length buffers for benefit of
383 driver tx function. */
384 ASSERT (b[0]->current_length > 0);
386 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
387 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
388 n_bytes += n_bytes_b0;
391 if (PREDICT_FALSE (current_config_index != ~0))
393 vnet_buffer (b[0])->feature_arc_index = arc;
394 b[0]->current_config_index = current_config_index;
397 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
400 vlib_increment_combined_counter (im->combined_sw_if_counters +
401 VNET_INTERFACE_COUNTER_TX,
402 thread_index, tx_swif0, 1,
409 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
410 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
411 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
412 vnet_calc_checksums_inline
414 b[0]->flags & VNET_BUFFER_F_IS_IP4,
415 b[0]->flags & VNET_BUFFER_F_IS_IP6);
420 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
423 /* Update main interface stats. */
424 vlib_increment_combined_counter (im->combined_sw_if_counters
425 + VNET_INTERFACE_COUNTER_TX,
427 rt->sw_if_index, n_packets, n_bytes);
430 #endif /* CLIB_MARCH_VARIANT */
432 static_always_inline void vnet_interface_pcap_tx_trace
433 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
434 int sw_if_index_from_buffer)
436 u32 n_left_from, *from;
438 vnet_pcap_t *pp = &vlib_global_main.pcap;
440 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
443 if (sw_if_index_from_buffer == 0)
445 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
446 sw_if_index = rt->sw_if_index;
451 n_left_from = frame->n_vectors;
452 from = vlib_frame_vector_args (frame);
454 while (n_left_from > 0)
456 int classify_filter_result;
458 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
462 if (pp->filter_classify_table_index != ~0)
464 classify_filter_result =
465 vnet_is_packet_traced_inline
466 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
467 if (classify_filter_result)
468 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
472 if (sw_if_index_from_buffer)
473 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
475 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
477 vnet_main_t *vnm = vnet_get_main ();
478 vnet_hw_interface_t *hi =
479 vnet_get_sup_hw_interface (vnm, sw_if_index);
480 /* Capture pkt if not filtered, or if filter hits */
481 if (hi->trace_classify_table_index == ~0 ||
482 vnet_is_packet_traced_inline
483 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
484 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
489 #ifndef CLIB_MARCH_VARIANT
492 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
493 vlib_frame_t * frame)
495 vnet_main_t *vnm = vnet_get_main ();
496 vnet_hw_interface_t *hi;
497 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
498 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
500 vnet_interface_pcap_tx_trace (vm, node, frame,
501 0 /* sw_if_index_from_buffer */ );
503 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
504 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
505 /* do_tx_offloads */ 0);
507 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
508 /* do_tx_offloads */ 1);
510 #endif /* CLIB_MARCH_VARIANT */
512 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
513 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
514 vlib_node_runtime_t *
516 vlib_frame_t * frame)
518 vnet_main_t *vnm = vnet_get_main ();
519 u32 n_left_to_next, *from, *to_next;
520 u32 n_left_from, next_index;
522 vnet_interface_pcap_tx_trace (vm, node, frame,
523 1 /* sw_if_index_from_buffer */ );
525 n_left_from = frame->n_vectors;
527 from = vlib_frame_vector_args (frame);
528 next_index = node->cached_next_index;
530 while (n_left_from > 0)
532 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
534 while (n_left_from >= 4 && n_left_to_next >= 2)
536 u32 bi0, bi1, next0, next1;
537 vlib_buffer_t *b0, *b1;
538 vnet_hw_interface_t *hi0, *hi1;
540 /* Prefetch next iteration. */
541 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
542 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
553 b0 = vlib_get_buffer (vm, bi0);
554 b1 = vlib_get_buffer (vm, bi1);
557 vnet_get_sup_hw_interface (vnm,
558 vnet_buffer (b0)->sw_if_index
561 vnet_get_sup_hw_interface (vnm,
562 vnet_buffer (b1)->sw_if_index
565 next0 = hi0->output_node_next_index;
566 next1 = hi1->output_node_next_index;
568 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
569 n_left_to_next, bi0, bi1, next0,
573 while (n_left_from > 0 && n_left_to_next > 0)
577 vnet_hw_interface_t *hi0;
586 b0 = vlib_get_buffer (vm, bi0);
589 vnet_get_sup_hw_interface (vnm,
590 vnet_buffer (b0)->sw_if_index
593 next0 = hi0->output_node_next_index;
595 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
596 n_left_to_next, bi0, next0);
599 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
602 return frame->n_vectors;
605 typedef struct vnet_error_trace_t_
612 ip46_address_t src, dst;
613 } vnet_error_trace_t;
616 format_vnet_error_trace (u8 * s, va_list * va)
618 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
619 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
620 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
622 /* Normal, non-catchup trace */
623 if (t->details_valid == 0)
625 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
626 vnet_get_main (), t->sw_if_index);
628 else if (t->details_valid == 1)
630 /* The trace capture code didn't understant the mactype */
631 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
633 else if (t->details_valid == 2)
635 /* Dump the src/dst addresses */
637 s = format (s, "IP4: %U -> %U",
638 format_ip4_address, &t->src.ip4,
639 format_ip4_address, &t->dst.ip4);
641 s = format (s, "IP6: %U -> %U",
642 format_ip6_address, &t->src.ip6,
643 format_ip6_address, &t->dst.ip6);
649 interface_trace_buffers (vlib_main_t * vm,
650 vlib_node_runtime_t * node, vlib_frame_t * frame)
652 u32 n_left, *buffers;
654 buffers = vlib_frame_vector_args (frame);
655 n_left = frame->n_vectors;
660 vlib_buffer_t *b0, *b1;
661 vnet_error_trace_t *t0, *t1;
663 /* Prefetch next iteration. */
664 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
665 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
670 b0 = vlib_get_buffer (vm, bi0);
671 b1 = vlib_get_buffer (vm, bi1);
673 if (b0->flags & VLIB_BUFFER_IS_TRACED)
675 t0 = vlib_add_trace (vm, node, b0,
676 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
677 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
678 t0->details_valid = 0;
680 if (b1->flags & VLIB_BUFFER_IS_TRACED)
682 t1 = vlib_add_trace (vm, node, b1,
683 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
684 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
685 t1->details_valid = 0;
695 vnet_error_trace_t *t0;
699 b0 = vlib_get_buffer (vm, bi0);
701 if (b0->flags & VLIB_BUFFER_IS_TRACED)
703 t0 = vlib_add_trace (vm, node, b0,
704 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
705 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
706 t0->details_valid = 0;
715 VNET_ERROR_DISPOSITION_DROP,
716 VNET_ERROR_DISPOSITION_PUNT,
717 VNET_ERROR_N_DISPOSITION,
718 } vnet_error_disposition_t;
721 drop_catchup_trace (vlib_main_t * vm,
722 vlib_node_runtime_t * node, vlib_buffer_t * b)
724 /* Can we safely rewind the buffer? If not, fagedaboudit */
725 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
727 vnet_error_trace_t *t;
730 ethernet_header_t *eh;
733 t = vlib_add_trace (vm, node, b, sizeof (*t));
734 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
735 vlib_buffer_advance (b, delta);
737 eh = vlib_buffer_get_current (b);
739 t->mactype = clib_net_to_host_u16 (eh->type);
740 t->details_valid = 1;
743 case ETHERNET_TYPE_IP4:
744 ip4 = (void *) (eh + 1);
745 t->details_valid = 2;
747 t->src.ip4.as_u32 = ip4->src_address.as_u32;
748 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
751 case ETHERNET_TYPE_IP6:
752 ip6 = (void *) (eh + 1);
753 t->details_valid = 2;
755 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
756 sizeof (ip6_address_t));
757 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
758 sizeof (ip6_address_t));
762 /* Dunno, do nothing, leave details_valid alone */
765 /* Restore current data (probably unnecessary) */
766 vlib_buffer_advance (b, -delta);
770 static_always_inline uword
771 interface_drop_punt (vlib_main_t * vm,
772 vlib_node_runtime_t * node,
773 vlib_frame_t * frame,
774 vnet_error_disposition_t disposition)
776 u32 *from, n_left, thread_index, *sw_if_index;
777 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
778 u32 sw_if_indices[VLIB_FRAME_SIZE];
779 vlib_simple_counter_main_t *cm;
780 u16 nexts[VLIB_FRAME_SIZE];
784 vnm = vnet_get_main ();
785 thread_index = vm->thread_index;
786 from = vlib_frame_vector_args (frame);
787 n_left = frame->n_vectors;
789 sw_if_index = sw_if_indices;
791 vlib_get_buffers (vm, from, bufs, n_left);
793 /* "trace add error-drop NNN?" */
794 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
796 /* If pkts aren't otherwise traced... */
797 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
799 /* Trace them from here */
800 node->flags |= VLIB_NODE_FLAG_TRACE;
801 while (n_trace && n_left)
803 vlib_trace_buffer (vm, node, 0 /* next_index */ ,
804 b[0], 0 /* follow chain */ );
806 * Here we have a wireshark dissector problem.
807 * Packets may be well-formed, or not. We
808 * must not blow chunks in any case.
810 * Try to produce trace records which will help
811 * folks understand what's going on.
813 drop_catchup_trace (vm, node, b[0]);
821 vlib_set_trace_count (vm, node, n_trace);
823 n_left = frame->n_vectors;
826 if (node->flags & VLIB_NODE_FLAG_TRACE)
827 interface_trace_buffers (vm, node, frame);
829 /* All going to drop regardless, this is just a counting exercise */
830 clib_memset (nexts, 0, sizeof (nexts));
832 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
833 (disposition == VNET_ERROR_DISPOSITION_PUNT
834 ? VNET_INTERFACE_COUNTER_PUNT
835 : VNET_INTERFACE_COUNTER_DROP));
837 /* collect the array of interfaces first ... */
842 /* Prefetch 8 ahead - there's not much going on in each iteration */
843 vlib_prefetch_buffer_header (b[4], LOAD);
844 vlib_prefetch_buffer_header (b[5], LOAD);
845 vlib_prefetch_buffer_header (b[6], LOAD);
846 vlib_prefetch_buffer_header (b[7], LOAD);
848 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
849 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
850 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
851 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
859 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
866 /* ... then count against them in blocks */
867 n_left = frame->n_vectors;
871 vnet_sw_interface_t *sw_if0;
874 off = frame->n_vectors - n_left;
876 sw_if_index = sw_if_indices + off;
878 count = clib_count_equal_u32 (sw_if_index, n_left);
881 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
883 /* Increment super-interface drop/punt counters for
885 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
886 if (sw_if0->sup_sw_if_index != sw_if_index[0])
887 vlib_increment_simple_counter
888 (cm, thread_index, sw_if0->sup_sw_if_index, count);
891 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
893 return frame->n_vectors;
897 pcap_drop_trace (vlib_main_t * vm,
898 vnet_interface_main_t * im,
899 vnet_pcap_t * pp, vlib_frame_t * f)
902 u32 n_left = f->n_vectors;
903 vlib_buffer_t *b0, *p1;
905 i16 save_current_data;
906 u16 save_current_length;
907 vlib_error_main_t *em = &vm->error_main;
911 from = vlib_frame_vector_args (f);
915 if (PREDICT_TRUE (n_left > 1))
917 p1 = vlib_get_buffer (vm, from[1]);
918 vlib_prefetch_buffer_header (p1, LOAD);
922 b0 = vlib_get_buffer (vm, bi0);
926 /* See if we're pointedly ignoring this specific error */
927 if (im->pcap_drop_filter_hash
928 && hash_get (im->pcap_drop_filter_hash, b0->error))
931 do_trace = (pp->pcap_sw_if_index == 0) ||
932 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
935 (do_trace == 0 && pp->filter_classify_table_index != ~0))
937 do_trace = vnet_is_packet_traced_inline
938 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
941 /* Trace all drops, or drops received on a specific interface */
944 save_current_data = b0->current_data;
945 save_current_length = b0->current_length;
948 * Typically, we'll need to rewind the buffer
949 * if l2_hdr_offset is valid, make sure to rewind to the start of
950 * the L2 header. This may not be the buffer start in case we pop-ed
952 * Otherwise, rewind to buffer start and hope for the best.
954 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
956 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
957 vlib_buffer_advance (b0,
958 vnet_buffer (b0)->l2_hdr_offset -
961 else if (b0->current_data > 0)
962 vlib_buffer_advance (b0, (word) - b0->current_data);
965 vlib_buffer_t *last = b0;
966 u32 error_node_index;
969 /* Length of the error string */
970 int error_string_len =
971 clib_strnlen (em->counters_heap[b0->error].name, 128);
973 /* Dig up the drop node */
974 error_node_index = vm->node_main.node_by_error[b0->error];
975 n = vlib_get_node (vm, error_node_index);
977 /* Length of full drop string, w/ "nodename: " prepended */
978 drop_string_len = error_string_len + vec_len (n->name) + 2;
980 /* Find the last buffer in the chain */
981 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
982 last = vlib_get_buffer (vm, last->next_buffer);
985 * Append <nodename>: <error-string> to the capture,
986 * only if we can do that without allocating a new buffer.
988 if (PREDICT_TRUE ((last->current_data + last->current_length)
989 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
992 clib_memcpy_fast (last->data + last->current_data +
993 last->current_length, n->name,
995 clib_memcpy_fast (last->data + last->current_data +
996 last->current_length + vec_len (n->name),
998 clib_memcpy_fast (last->data + last->current_data +
999 last->current_length + vec_len (n->name) +
1000 2, em->counters_heap[b0->error].name,
1002 last->current_length += drop_string_len;
1003 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1004 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1005 pp->max_bytes_per_pkt);
1006 last->current_length -= drop_string_len;
1007 b0->current_data = save_current_data;
1008 b0->current_length = save_current_length;
1014 * Didn't have space in the last buffer, here's the dropped
1017 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1019 b0->current_data = save_current_data;
1020 b0->current_length = save_current_length;
1025 #ifndef CLIB_MARCH_VARIANT
1027 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1029 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1031 if (im->pcap_drop_filter_hash == 0)
1032 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1035 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1037 hash_unset (im->pcap_drop_filter_hash, error_index);
1039 #endif /* CLIB_MARCH_VARIANT */
1041 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1042 vlib_node_runtime_t * node,
1043 vlib_frame_t * frame)
1045 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1046 vnet_pcap_t *pp = &vlib_global_main.pcap;
1048 if (PREDICT_FALSE (pp->pcap_drop_enable))
1049 pcap_drop_trace (vm, im, pp, frame);
1051 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1054 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1055 vlib_node_runtime_t * node,
1056 vlib_frame_t * frame)
1058 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1062 VLIB_REGISTER_NODE (interface_drop) = {
1063 .name = "error-drop",
1064 .vector_size = sizeof (u32),
1065 .format_trace = format_vnet_error_trace,
1066 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1075 VLIB_REGISTER_NODE (interface_punt) = {
1076 .name = "error-punt",
1077 .vector_size = sizeof (u32),
1078 .format_trace = format_vnet_error_trace,
1079 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1088 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1089 .name = "interface-output",
1090 .vector_size = sizeof (u32),
1095 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1096 vlib_frame_t * from_frame)
1098 vnet_main_t *vnm = vnet_get_main ();
1099 u32 last_sw_if_index = ~0;
1100 vlib_frame_t *to_frame = 0;
1101 vnet_hw_interface_t *hw = 0;
1102 u32 *from, *to_next = 0;
1105 from = vlib_frame_vector_args (from_frame);
1106 n_left_from = from_frame->n_vectors;
1107 while (n_left_from > 0)
1116 b0 = vlib_get_buffer (vm, bi0);
1117 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1119 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1123 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1124 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1126 last_sw_if_index = sw_if_index0;
1127 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1128 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1129 to_next = vlib_frame_vector_args (to_frame);
1134 to_frame->n_vectors++;
1136 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1137 return from_frame->n_vectors;
1141 VLIB_REGISTER_NODE (interface_tx) = {
1142 .function = interface_tx_node_fn,
1143 .name = "interface-tx",
1144 .vector_size = sizeof (u32),
1151 VNET_FEATURE_ARC_INIT (interface_output, static) =
1153 .arc_name = "interface-output",
1154 .start_nodes = VNET_FEATURES (0),
1155 .last_in_arc = "interface-tx",
1156 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1159 VNET_FEATURE_INIT (span_tx, static) = {
1160 .arc_name = "interface-output",
1161 .node_name = "span-output",
1162 .runs_before = VNET_FEATURES ("interface-tx"),
1165 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1166 .arc_name = "interface-output",
1167 .node_name = "ipsec-if-output",
1168 .runs_before = VNET_FEATURES ("interface-tx"),
1171 VNET_FEATURE_INIT (interface_tx, static) = {
1172 .arc_name = "interface-output",
1173 .node_name = "interface-tx",
1178 #ifndef CLIB_MARCH_VARIANT
1180 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1184 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1187 if (hi->output_node_index == 0)
1190 next_index = vlib_node_add_next
1191 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1192 hi->output_node_index);
1193 hi->output_node_next_index = next_index;
1198 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1199 (vnet_per_buffer_interface_output_hw_interface_add_del);
1202 vnet_set_interface_output_node (vnet_main_t * vnm,
1203 u32 hw_if_index, u32 node_index)
1205 ASSERT (node_index);
1206 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1207 u32 next_index = vlib_node_add_next
1208 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1209 hi->output_node_next_index = next_index;
1210 hi->output_node_index = node_index;
1212 #endif /* CLIB_MARCH_VARIANT */
1215 * fd.io coding-style-patch-verification: ON
1218 * eval: (c-set-style "gnu")