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 void
166 vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b)
168 if (b->flags & VNET_BUFFER_F_OFFLOAD)
169 vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4,
170 b->flags & VNET_BUFFER_F_IS_IP6);
173 static_always_inline uword
174 vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index,
175 vlib_combined_counter_main_t *ccm,
176 vlib_buffer_t **b, u32 config_index, u8 arc,
177 u32 n_left, int do_tx_offloads,
181 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
182 u32 ti = vm->thread_index;
188 /* Prefetch next iteration. */
189 vlib_prefetch_buffer_header (b[4], LOAD);
190 vlib_prefetch_buffer_header (b[5], LOAD);
191 vlib_prefetch_buffer_header (b[6], LOAD);
192 vlib_prefetch_buffer_header (b[7], LOAD);
195 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
197 /* Be grumpy about zero length buffers for benefit of
198 driver tx function. */
199 ASSERT (b[0]->current_length > 0);
200 ASSERT (b[1]->current_length > 0);
201 ASSERT (b[2]->current_length > 0);
202 ASSERT (b[3]->current_length > 0);
204 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
205 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
206 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
207 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
211 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
212 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
213 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
214 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
215 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
217 /* update vlan subif tx counts, if required */
218 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
219 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
221 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
222 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
224 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
225 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
227 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
228 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
230 if (PREDICT_FALSE (config_index != ~0))
232 vnet_buffer (b[0])->feature_arc_index = arc;
233 b[0]->current_config_index = config_index;
234 vnet_buffer (b[1])->feature_arc_index = arc;
235 b[1]->current_config_index = config_index;
236 vnet_buffer (b[2])->feature_arc_index = arc;
237 b[2]->current_config_index = config_index;
238 vnet_buffer (b[3])->feature_arc_index = arc;
239 b[3]->current_config_index = config_index;
243 if (do_tx_offloads && (or_flags & VNET_BUFFER_F_OFFLOAD))
245 vnet_interface_output_handle_offload (vm, b[0]);
246 vnet_interface_output_handle_offload (vm, b[1]);
247 vnet_interface_output_handle_offload (vm, b[2]);
248 vnet_interface_output_handle_offload (vm, b[3]);
257 /* Be grumpy about zero length buffers for benefit of
258 driver tx function. */
259 ASSERT (b[0]->current_length > 0);
261 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
265 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
267 if (PREDICT_FALSE (config_index != ~0))
269 vnet_buffer (b[0])->feature_arc_index = arc;
270 b[0]->current_config_index = config_index;
273 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
274 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
278 vnet_interface_output_handle_offload (vm, b[0]);
287 static_always_inline void vnet_interface_pcap_tx_trace
288 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
289 int sw_if_index_from_buffer)
291 vnet_main_t *vnm = vnet_get_main ();
292 u32 n_left_from, *from;
294 vnet_pcap_t *pp = &vnm->pcap;
296 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
299 if (sw_if_index_from_buffer == 0)
301 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
302 sw_if_index = rt->sw_if_index;
307 n_left_from = frame->n_vectors;
308 from = vlib_frame_vector_args (frame);
310 while (n_left_from > 0)
312 int classify_filter_result;
314 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
318 if (pp->filter_classify_table_index != ~0)
320 classify_filter_result =
321 vnet_is_packet_traced_inline
322 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
323 if (classify_filter_result)
324 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
328 if (sw_if_index_from_buffer)
329 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
331 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
333 vnet_main_t *vnm = vnet_get_main ();
334 vnet_hw_interface_t *hi =
335 vnet_get_sup_hw_interface (vnm, sw_if_index);
336 /* Capture pkt if not filtered, or if filter hits */
337 if (hi->trace_classify_table_index == ~0 ||
338 vnet_is_packet_traced_inline
339 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
340 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
345 VLIB_NODE_FN (vnet_interface_output_node)
346 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
348 vnet_main_t *vnm = vnet_get_main ();
349 vnet_interface_main_t *im = &vnm->interface_main;
350 vlib_combined_counter_main_t *ccm;
351 vnet_hw_interface_t *hi;
352 vnet_sw_interface_t *si;
353 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
354 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
355 u32 n_bytes, n_buffers = frame->n_vectors;
356 u32 config_index = ~0;
357 u32 sw_if_index = rt->sw_if_index;
358 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
359 u32 ti = vm->thread_index;
360 u8 arc = im->output_feature_arc_index;
361 int arc_or_subif = 0;
362 int do_tx_offloads = 0;
365 if (node->flags & VLIB_NODE_FLAG_TRACE)
366 vnet_interface_output_trace (vm, node, frame, n_buffers);
368 from = vlib_frame_vector_args (frame);
371 return vlib_error_drop_buffers (
373 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
374 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
376 vnet_interface_pcap_tx_trace (vm, node, frame,
377 0 /* sw_if_index_from_buffer */ );
379 vlib_get_buffers (vm, from, bufs, n_buffers);
381 si = vnet_get_sw_interface (vnm, sw_if_index);
382 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
384 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
385 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
387 vlib_simple_counter_main_t *cm;
389 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
390 VNET_INTERFACE_COUNTER_TX_ERROR);
391 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
393 return vlib_error_drop_buffers (
395 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
396 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
399 /* interface-output feature arc handling */
400 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
402 vnet_feature_config_main_t *fcm;
403 fcm = vnet_feature_get_config_main (arc);
404 config_index = vnet_get_feature_config_index (arc, sw_if_index);
405 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
408 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
411 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
413 if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) == 0)
416 if (do_tx_offloads == 0 && arc_or_subif == 0)
417 n_bytes = vnet_interface_output_node_inline (
418 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0, 0);
419 else if (arc_or_subif)
420 n_bytes = vnet_interface_output_node_inline (
421 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0, 1);
422 else if (do_tx_offloads)
423 n_bytes = vnet_interface_output_node_inline (
424 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1, 0);
426 n_bytes = vnet_interface_output_node_inline (
427 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1, 1);
429 vlib_buffer_enqueue_to_single_next (vm, node, vlib_frame_vector_args (frame),
430 next_index, frame->n_vectors);
432 /* Update main interface stats. */
433 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
437 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
438 .name = "interface-output-template",
439 .vector_size = sizeof (u32),
442 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
443 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
444 vlib_node_runtime_t *
446 vlib_frame_t * frame)
448 vnet_main_t *vnm = vnet_get_main ();
449 u32 n_left_to_next, *from, *to_next;
450 u32 n_left_from, next_index;
452 vnet_interface_pcap_tx_trace (vm, node, frame,
453 1 /* sw_if_index_from_buffer */ );
455 n_left_from = frame->n_vectors;
457 from = vlib_frame_vector_args (frame);
458 next_index = node->cached_next_index;
460 while (n_left_from > 0)
462 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
464 while (n_left_from >= 4 && n_left_to_next >= 2)
466 u32 bi0, bi1, next0, next1;
467 vlib_buffer_t *b0, *b1;
468 vnet_hw_interface_t *hi0, *hi1;
470 /* Prefetch next iteration. */
471 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
472 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
483 b0 = vlib_get_buffer (vm, bi0);
484 b1 = vlib_get_buffer (vm, bi1);
487 vnet_get_sup_hw_interface (vnm,
488 vnet_buffer (b0)->sw_if_index
491 vnet_get_sup_hw_interface (vnm,
492 vnet_buffer (b1)->sw_if_index
495 next0 = hi0->output_node_next_index;
496 next1 = hi1->output_node_next_index;
498 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
499 n_left_to_next, bi0, bi1, next0,
503 while (n_left_from > 0 && n_left_to_next > 0)
507 vnet_hw_interface_t *hi0;
516 b0 = vlib_get_buffer (vm, bi0);
519 vnet_get_sup_hw_interface (vnm,
520 vnet_buffer (b0)->sw_if_index
523 next0 = hi0->output_node_next_index;
525 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
526 n_left_to_next, bi0, next0);
529 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
532 return frame->n_vectors;
535 typedef struct vnet_error_trace_t_
542 ip46_address_t src, dst;
543 } vnet_error_trace_t;
546 format_vnet_error_trace (u8 * s, va_list * va)
548 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
549 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
550 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
552 /* Normal, non-catchup trace */
553 if (t->details_valid == 0)
555 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
556 vnet_get_main (), t->sw_if_index);
558 else if (t->details_valid == 1)
560 /* The trace capture code didn't understant the mactype */
561 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
563 else if (t->details_valid == 2)
565 /* Dump the src/dst addresses */
567 s = format (s, "IP4: %U -> %U",
568 format_ip4_address, &t->src.ip4,
569 format_ip4_address, &t->dst.ip4);
571 s = format (s, "IP6: %U -> %U",
572 format_ip6_address, &t->src.ip6,
573 format_ip6_address, &t->dst.ip6);
579 interface_trace_buffers (vlib_main_t * vm,
580 vlib_node_runtime_t * node, vlib_frame_t * frame)
582 u32 n_left, *buffers;
584 buffers = vlib_frame_vector_args (frame);
585 n_left = frame->n_vectors;
590 vlib_buffer_t *b0, *b1;
591 vnet_error_trace_t *t0, *t1;
593 /* Prefetch next iteration. */
594 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
595 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
600 b0 = vlib_get_buffer (vm, bi0);
601 b1 = vlib_get_buffer (vm, bi1);
603 if (b0->flags & VLIB_BUFFER_IS_TRACED)
605 t0 = vlib_add_trace (vm, node, b0,
606 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
607 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
608 t0->details_valid = 0;
610 if (b1->flags & VLIB_BUFFER_IS_TRACED)
612 t1 = vlib_add_trace (vm, node, b1,
613 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
614 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
615 t1->details_valid = 0;
625 vnet_error_trace_t *t0;
629 b0 = vlib_get_buffer (vm, bi0);
631 if (b0->flags & VLIB_BUFFER_IS_TRACED)
633 t0 = vlib_add_trace (vm, node, b0,
634 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
635 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
636 t0->details_valid = 0;
645 VNET_ERROR_DISPOSITION_DROP,
646 VNET_ERROR_DISPOSITION_PUNT,
647 VNET_ERROR_N_DISPOSITION,
648 } vnet_error_disposition_t;
651 drop_catchup_trace (vlib_main_t * vm,
652 vlib_node_runtime_t * node, vlib_buffer_t * b)
654 /* Can we safely rewind the buffer? If not, fagedaboudit */
655 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
657 vnet_error_trace_t *t;
660 ethernet_header_t *eh;
663 t = vlib_add_trace (vm, node, b, sizeof (*t));
664 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
665 vlib_buffer_advance (b, delta);
667 eh = vlib_buffer_get_current (b);
669 t->mactype = clib_net_to_host_u16 (eh->type);
670 t->details_valid = 1;
673 case ETHERNET_TYPE_IP4:
674 ip4 = (void *) (eh + 1);
675 t->details_valid = 2;
677 t->src.ip4.as_u32 = ip4->src_address.as_u32;
678 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
681 case ETHERNET_TYPE_IP6:
682 ip6 = (void *) (eh + 1);
683 t->details_valid = 2;
685 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
686 sizeof (ip6_address_t));
687 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
688 sizeof (ip6_address_t));
692 /* Dunno, do nothing, leave details_valid alone */
695 /* Restore current data (probably unnecessary) */
696 vlib_buffer_advance (b, -delta);
700 static_always_inline uword
701 interface_drop_punt (vlib_main_t * vm,
702 vlib_node_runtime_t * node,
703 vlib_frame_t * frame,
704 vnet_error_disposition_t disposition)
706 u32 *from, n_left, thread_index, *sw_if_index;
707 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
708 u32 sw_if_indices[VLIB_FRAME_SIZE];
709 vlib_simple_counter_main_t *cm;
710 u16 nexts[VLIB_FRAME_SIZE];
714 vnm = vnet_get_main ();
715 thread_index = vm->thread_index;
716 from = vlib_frame_vector_args (frame);
717 n_left = frame->n_vectors;
719 sw_if_index = sw_if_indices;
721 vlib_get_buffers (vm, from, bufs, n_left);
723 /* "trace add error-drop NNN?" */
724 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
726 /* If pkts aren't otherwise traced... */
727 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
729 /* Trace them from here */
730 node->flags |= VLIB_NODE_FLAG_TRACE;
731 while (n_trace && n_left)
734 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
735 0 /* follow chain */ )))
738 * Here we have a wireshark dissector problem.
739 * Packets may be well-formed, or not. We
740 * must not blow chunks in any case.
742 * Try to produce trace records which will help
743 * folks understand what's going on.
745 drop_catchup_trace (vm, node, b[0]);
753 vlib_set_trace_count (vm, node, n_trace);
755 n_left = frame->n_vectors;
758 if (node->flags & VLIB_NODE_FLAG_TRACE)
759 interface_trace_buffers (vm, node, frame);
761 /* All going to drop regardless, this is just a counting exercise */
762 clib_memset (nexts, 0, sizeof (nexts));
764 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
765 (disposition == VNET_ERROR_DISPOSITION_PUNT
766 ? VNET_INTERFACE_COUNTER_PUNT
767 : VNET_INTERFACE_COUNTER_DROP));
769 /* collect the array of interfaces first ... */
774 /* Prefetch 8 ahead - there's not much going on in each iteration */
775 vlib_prefetch_buffer_header (b[4], LOAD);
776 vlib_prefetch_buffer_header (b[5], LOAD);
777 vlib_prefetch_buffer_header (b[6], LOAD);
778 vlib_prefetch_buffer_header (b[7], LOAD);
780 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
781 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
782 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
783 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
791 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
798 /* ... then count against them in blocks */
799 n_left = frame->n_vectors;
803 vnet_sw_interface_t *sw_if0;
806 off = frame->n_vectors - n_left;
808 sw_if_index = sw_if_indices + off;
810 count = clib_count_equal_u32 (sw_if_index, n_left);
813 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
815 /* Increment super-interface drop/punt counters for
817 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
818 if (sw_if0->sup_sw_if_index != sw_if_index[0])
819 vlib_increment_simple_counter
820 (cm, thread_index, sw_if0->sup_sw_if_index, count);
823 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
825 return frame->n_vectors;
829 pcap_drop_trace (vlib_main_t * vm,
830 vnet_interface_main_t * im,
831 vnet_pcap_t * pp, vlib_frame_t * f)
834 u32 n_left = f->n_vectors;
835 vlib_buffer_t *b0, *p1;
837 i16 save_current_data;
838 u16 save_current_length;
839 vlib_error_main_t *em = &vm->error_main;
843 from = vlib_frame_vector_args (f);
847 if (PREDICT_TRUE (n_left > 1))
849 p1 = vlib_get_buffer (vm, from[1]);
850 vlib_prefetch_buffer_header (p1, LOAD);
854 b0 = vlib_get_buffer (vm, bi0);
858 /* See if we're pointedly ignoring this specific error */
859 if (im->pcap_drop_filter_hash
860 && hash_get (im->pcap_drop_filter_hash, b0->error))
863 do_trace = (pp->pcap_sw_if_index == 0) ||
864 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
867 (do_trace == 0 && pp->filter_classify_table_index != ~0))
869 do_trace = vnet_is_packet_traced_inline
870 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
873 /* Trace all drops, or drops received on a specific interface */
876 save_current_data = b0->current_data;
877 save_current_length = b0->current_length;
880 * Typically, we'll need to rewind the buffer
881 * if l2_hdr_offset is valid, make sure to rewind to the start of
882 * the L2 header. This may not be the buffer start in case we pop-ed
884 * Otherwise, rewind to buffer start and hope for the best.
886 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
888 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
889 vlib_buffer_advance (b0,
890 vnet_buffer (b0)->l2_hdr_offset -
893 else if (b0->current_data > 0)
894 vlib_buffer_advance (b0, (word) - b0->current_data);
897 vlib_buffer_t *last = b0;
898 u32 error_node_index;
901 /* Length of the error string */
902 int error_string_len =
903 clib_strnlen (em->counters_heap[b0->error].name, 128);
905 /* Dig up the drop node */
906 error_node_index = vm->node_main.node_by_error[b0->error];
907 n = vlib_get_node (vm, error_node_index);
909 /* Length of full drop string, w/ "nodename: " prepended */
910 drop_string_len = error_string_len + vec_len (n->name) + 2;
912 /* Find the last buffer in the chain */
913 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
914 last = vlib_get_buffer (vm, last->next_buffer);
917 * Append <nodename>: <error-string> to the capture,
918 * only if we can do that without allocating a new buffer.
920 if (PREDICT_TRUE ((last->current_data + last->current_length)
921 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
924 clib_memcpy_fast (last->data + last->current_data +
925 last->current_length, n->name,
927 clib_memcpy_fast (last->data + last->current_data +
928 last->current_length + vec_len (n->name),
930 clib_memcpy_fast (last->data + last->current_data +
931 last->current_length + vec_len (n->name) +
932 2, em->counters_heap[b0->error].name,
934 last->current_length += drop_string_len;
935 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
936 pcap_add_buffer (&pp->pcap_main, vm, bi0,
937 pp->max_bytes_per_pkt);
938 last->current_length -= drop_string_len;
939 b0->current_data = save_current_data;
940 b0->current_length = save_current_length;
946 * Didn't have space in the last buffer, here's the dropped
949 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
951 b0->current_data = save_current_data;
952 b0->current_length = save_current_length;
957 #ifndef CLIB_MARCH_VARIANT
959 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
961 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
963 if (im->pcap_drop_filter_hash == 0)
964 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
967 hash_set (im->pcap_drop_filter_hash, error_index, 1);
969 hash_unset (im->pcap_drop_filter_hash, error_index);
971 #endif /* CLIB_MARCH_VARIANT */
973 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
974 vlib_node_runtime_t * node,
975 vlib_frame_t * frame)
977 vnet_main_t *vnm = vnet_get_main ();
978 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
979 vnet_pcap_t *pp = &vnm->pcap;
981 if (PREDICT_FALSE (pp->pcap_drop_enable))
982 pcap_drop_trace (vm, im, pp, frame);
984 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
987 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
988 vlib_node_runtime_t * node,
989 vlib_frame_t * frame)
991 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
995 VLIB_REGISTER_NODE (interface_drop) = {
996 .name = "error-drop",
997 .vector_size = sizeof (u32),
998 .format_trace = format_vnet_error_trace,
999 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1008 VLIB_REGISTER_NODE (interface_punt) = {
1009 .name = "error-punt",
1010 .vector_size = sizeof (u32),
1011 .format_trace = format_vnet_error_trace,
1012 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1021 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1022 .name = "interface-output",
1023 .vector_size = sizeof (u32),
1028 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1029 vlib_frame_t * from_frame)
1031 vnet_main_t *vnm = vnet_get_main ();
1032 u32 last_sw_if_index = ~0;
1033 vlib_frame_t *to_frame = 0;
1034 vnet_hw_interface_t *hw = 0;
1035 u32 *from, *to_next = 0;
1038 from = vlib_frame_vector_args (from_frame);
1039 n_left_from = from_frame->n_vectors;
1040 while (n_left_from > 0)
1049 b0 = vlib_get_buffer (vm, bi0);
1050 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1052 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1056 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1057 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1059 last_sw_if_index = sw_if_index0;
1060 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1061 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1062 to_next = vlib_frame_vector_args (to_frame);
1067 to_frame->n_vectors++;
1069 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1070 return from_frame->n_vectors;
1074 VLIB_REGISTER_NODE (interface_tx) = {
1075 .function = interface_tx_node_fn,
1076 .name = "interface-tx",
1077 .vector_size = sizeof (u32),
1084 VNET_FEATURE_ARC_INIT (interface_output, static) =
1086 .arc_name = "interface-output",
1087 .start_nodes = VNET_FEATURES (0),
1088 .last_in_arc = "interface-tx",
1089 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1092 VNET_FEATURE_INIT (span_tx, static) = {
1093 .arc_name = "interface-output",
1094 .node_name = "span-output",
1095 .runs_before = VNET_FEATURES ("interface-tx"),
1098 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1099 .arc_name = "interface-output",
1100 .node_name = "ipsec-if-output",
1101 .runs_before = VNET_FEATURES ("interface-tx"),
1104 VNET_FEATURE_INIT (interface_tx, static) = {
1105 .arc_name = "interface-output",
1106 .node_name = "interface-tx",
1111 #ifndef CLIB_MARCH_VARIANT
1113 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1117 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1120 if (hi->output_node_index == 0)
1123 next_index = vlib_node_add_next
1124 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1125 hi->output_node_index);
1126 hi->output_node_next_index = next_index;
1131 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1132 (vnet_per_buffer_interface_output_hw_interface_add_del);
1135 vnet_set_interface_output_node (vnet_main_t * vnm,
1136 u32 hw_if_index, u32 node_index)
1138 ASSERT (node_index);
1139 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1140 u32 next_index = vlib_node_add_next
1141 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1142 hi->output_node_next_index = next_index;
1143 hi->output_node_index = node_index;
1145 #endif /* CLIB_MARCH_VARIANT */
1148 * fd.io coding-style-patch-verification: ON
1151 * eval: (c-set-style "gnu")