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,
167 vlib_node_runtime_t * node,
168 vlib_frame_t * frame,
170 vnet_hw_interface_t * hi,
173 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
174 vnet_sw_interface_t *si;
175 u32 n_left_to_tx, *from, *from_end, *to_tx;
176 u32 n_bytes, n_buffers, n_packets;
177 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
178 u32 thread_index = vm->thread_index;
179 vnet_interface_main_t *im = &vnm->interface_main;
180 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
181 u32 current_config_index = ~0;
182 u8 arc = im->output_feature_arc_index;
183 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
185 n_buffers = frame->n_vectors;
187 if (node->flags & VLIB_NODE_FLAG_TRACE)
188 vnet_interface_output_trace (vm, node, frame, n_buffers);
190 from = vlib_frame_vector_args (frame);
191 vlib_get_buffers (vm, from, b, n_buffers);
194 return vlib_error_drop_buffers (vm, node, from,
195 /* buffer stride */ 1,
197 VNET_INTERFACE_OUTPUT_NEXT_DROP,
199 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
201 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
202 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
203 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
204 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
206 vlib_simple_counter_main_t *cm;
208 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
209 VNET_INTERFACE_COUNTER_TX_ERROR);
210 vlib_increment_simple_counter (cm, thread_index,
211 rt->sw_if_index, n_buffers);
213 return vlib_error_drop_buffers (vm, node, from,
214 /* buffer stride */ 1,
216 VNET_INTERFACE_OUTPUT_NEXT_DROP,
218 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
221 from_end = from + n_buffers;
223 /* Total byte count of all buffers. */
227 /* interface-output feature arc handling */
228 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
230 vnet_feature_config_main_t *fcm;
231 fcm = vnet_feature_get_config_main (arc);
232 current_config_index = vnet_get_feature_config_index (arc,
234 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
238 while (from < from_end)
240 /* Get new next frame since previous incomplete frame may have less
241 than VNET_FRAME_SIZE vectors in it. */
242 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
244 while (from + 8 <= from_end && n_left_to_tx >= 4)
246 u32 bi0, bi1, bi2, bi3;
247 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
250 /* Prefetch next iteration. */
251 vlib_prefetch_buffer_header (b[4], LOAD);
252 vlib_prefetch_buffer_header (b[5], LOAD);
253 vlib_prefetch_buffer_header (b[6], LOAD);
254 vlib_prefetch_buffer_header (b[7], LOAD);
265 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
271 /* Be grumpy about zero length buffers for benefit of
272 driver tx function. */
273 ASSERT (b[0]->current_length > 0);
274 ASSERT (b[1]->current_length > 0);
275 ASSERT (b[2]->current_length > 0);
276 ASSERT (b[3]->current_length > 0);
278 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
279 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
280 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
281 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
282 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
283 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
284 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
285 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
287 n_bytes += n_bytes_b0 + n_bytes_b1;
288 n_bytes += n_bytes_b2 + n_bytes_b3;
291 if (PREDICT_FALSE (current_config_index != ~0))
293 vnet_buffer (b[0])->feature_arc_index = arc;
294 vnet_buffer (b[1])->feature_arc_index = arc;
295 vnet_buffer (b[2])->feature_arc_index = arc;
296 vnet_buffer (b[3])->feature_arc_index = arc;
297 b[0]->current_config_index = current_config_index;
298 b[1]->current_config_index = current_config_index;
299 b[2]->current_config_index = current_config_index;
300 b[3]->current_config_index = current_config_index;
303 /* update vlan subif tx counts, if required */
304 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
306 vlib_increment_combined_counter (im->combined_sw_if_counters +
307 VNET_INTERFACE_COUNTER_TX,
308 thread_index, tx_swif0, 1,
312 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
315 vlib_increment_combined_counter (im->combined_sw_if_counters +
316 VNET_INTERFACE_COUNTER_TX,
317 thread_index, tx_swif1, 1,
321 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
324 vlib_increment_combined_counter (im->combined_sw_if_counters +
325 VNET_INTERFACE_COUNTER_TX,
326 thread_index, tx_swif2, 1,
329 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
332 vlib_increment_combined_counter (im->combined_sw_if_counters +
333 VNET_INTERFACE_COUNTER_TX,
334 thread_index, tx_swif3, 1,
340 u32 vnet_buffer_offload_flags =
341 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
342 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
343 VNET_BUFFER_F_OFFLOAD_IP_CKSUM);
344 if (or_flags & vnet_buffer_offload_flags)
346 if (b[0]->flags & vnet_buffer_offload_flags)
347 vnet_calc_checksums_inline
349 b[0]->flags & VNET_BUFFER_F_IS_IP4,
350 b[0]->flags & VNET_BUFFER_F_IS_IP6);
351 if (b[1]->flags & vnet_buffer_offload_flags)
352 vnet_calc_checksums_inline
354 b[1]->flags & VNET_BUFFER_F_IS_IP4,
355 b[1]->flags & VNET_BUFFER_F_IS_IP6);
356 if (b[2]->flags & vnet_buffer_offload_flags)
357 vnet_calc_checksums_inline
359 b[2]->flags & VNET_BUFFER_F_IS_IP4,
360 b[2]->flags & VNET_BUFFER_F_IS_IP6);
361 if (b[3]->flags & vnet_buffer_offload_flags)
362 vnet_calc_checksums_inline
364 b[3]->flags & VNET_BUFFER_F_IS_IP4,
365 b[3]->flags & VNET_BUFFER_F_IS_IP6);
372 while (from + 1 <= from_end && n_left_to_tx >= 1)
383 /* Be grumpy about zero length buffers for benefit of
384 driver tx function. */
385 ASSERT (b[0]->current_length > 0);
387 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
388 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
389 n_bytes += n_bytes_b0;
392 if (PREDICT_FALSE (current_config_index != ~0))
394 vnet_buffer (b[0])->feature_arc_index = arc;
395 b[0]->current_config_index = current_config_index;
398 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
401 vlib_increment_combined_counter (im->combined_sw_if_counters +
402 VNET_INTERFACE_COUNTER_TX,
403 thread_index, tx_swif0, 1,
410 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
411 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
412 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
413 vnet_calc_checksums_inline
415 b[0]->flags & VNET_BUFFER_F_IS_IP4,
416 b[0]->flags & VNET_BUFFER_F_IS_IP6);
421 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
424 /* Update main interface stats. */
425 vlib_increment_combined_counter (im->combined_sw_if_counters
426 + VNET_INTERFACE_COUNTER_TX,
428 rt->sw_if_index, n_packets, n_bytes);
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 static vlib_node_function_t CLIB_MULTIARCH_FN (vnet_interface_output_node);
492 CLIB_MULTIARCH_FN (vnet_interface_output_node) (vlib_main_t * vm,
493 vlib_node_runtime_t * node,
494 vlib_frame_t * frame)
496 vnet_main_t *vnm = vnet_get_main ();
497 vnet_hw_interface_t *hi;
498 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
499 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
501 vnet_interface_pcap_tx_trace (vm, node, frame,
502 0 /* sw_if_index_from_buffer */ );
504 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
505 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
506 /* do_tx_offloads */ 0);
508 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
509 /* do_tx_offloads */ 1);
512 CLIB_MARCH_FN_REGISTRATION (vnet_interface_output_node);
514 #ifndef CLIB_MARCH_VARIANT
515 vlib_node_function_t *
516 vnet_interface_output_node_get (vlib_main_t * vm)
518 vlib_node_function_t *fn = 0;
519 vlib_node_fn_registration_t *fnr;
521 vlib_node_t *node = vlib_get_node_by_name (vm, (u8 *) "interface-output");
524 /* search for the same name */
525 fnr = node->node_fn_registrations;
528 if (fnr->function == node->function)
533 fnr = fnr->next_registration;
538 fn = CLIB_MARCH_FN_POINTER_BY_NAME (vnet_interface_output_node, name);
540 if (!fn) /* revert to march type selection if search failed */
542 fn = CLIB_MARCH_FN_POINTER (vnet_interface_output_node);
546 #endif /* CLIB_MARCH_VARIANT */
548 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
549 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
550 vlib_node_runtime_t *
552 vlib_frame_t * frame)
554 vnet_main_t *vnm = vnet_get_main ();
555 u32 n_left_to_next, *from, *to_next;
556 u32 n_left_from, next_index;
558 vnet_interface_pcap_tx_trace (vm, node, frame,
559 1 /* sw_if_index_from_buffer */ );
561 n_left_from = frame->n_vectors;
563 from = vlib_frame_vector_args (frame);
564 next_index = node->cached_next_index;
566 while (n_left_from > 0)
568 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
570 while (n_left_from >= 4 && n_left_to_next >= 2)
572 u32 bi0, bi1, next0, next1;
573 vlib_buffer_t *b0, *b1;
574 vnet_hw_interface_t *hi0, *hi1;
576 /* Prefetch next iteration. */
577 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
578 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
589 b0 = vlib_get_buffer (vm, bi0);
590 b1 = vlib_get_buffer (vm, bi1);
593 vnet_get_sup_hw_interface (vnm,
594 vnet_buffer (b0)->sw_if_index
597 vnet_get_sup_hw_interface (vnm,
598 vnet_buffer (b1)->sw_if_index
601 next0 = hi0->output_node_next_index;
602 next1 = hi1->output_node_next_index;
604 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
605 n_left_to_next, bi0, bi1, next0,
609 while (n_left_from > 0 && n_left_to_next > 0)
613 vnet_hw_interface_t *hi0;
622 b0 = vlib_get_buffer (vm, bi0);
625 vnet_get_sup_hw_interface (vnm,
626 vnet_buffer (b0)->sw_if_index
629 next0 = hi0->output_node_next_index;
631 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
632 n_left_to_next, bi0, next0);
635 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
638 return frame->n_vectors;
641 typedef struct vnet_error_trace_t_
648 ip46_address_t src, dst;
649 } vnet_error_trace_t;
652 format_vnet_error_trace (u8 * s, va_list * va)
654 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
655 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
656 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
658 /* Normal, non-catchup trace */
659 if (t->details_valid == 0)
661 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
662 vnet_get_main (), t->sw_if_index);
664 else if (t->details_valid == 1)
666 /* The trace capture code didn't understant the mactype */
667 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
669 else if (t->details_valid == 2)
671 /* Dump the src/dst addresses */
673 s = format (s, "IP4: %U -> %U",
674 format_ip4_address, &t->src.ip4,
675 format_ip4_address, &t->dst.ip4);
677 s = format (s, "IP6: %U -> %U",
678 format_ip6_address, &t->src.ip6,
679 format_ip6_address, &t->dst.ip6);
685 interface_trace_buffers (vlib_main_t * vm,
686 vlib_node_runtime_t * node, vlib_frame_t * frame)
688 u32 n_left, *buffers;
690 buffers = vlib_frame_vector_args (frame);
691 n_left = frame->n_vectors;
696 vlib_buffer_t *b0, *b1;
697 vnet_error_trace_t *t0, *t1;
699 /* Prefetch next iteration. */
700 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
701 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
706 b0 = vlib_get_buffer (vm, bi0);
707 b1 = vlib_get_buffer (vm, bi1);
709 if (b0->flags & VLIB_BUFFER_IS_TRACED)
711 t0 = vlib_add_trace (vm, node, b0,
712 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
713 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
714 t0->details_valid = 0;
716 if (b1->flags & VLIB_BUFFER_IS_TRACED)
718 t1 = vlib_add_trace (vm, node, b1,
719 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
720 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
721 t1->details_valid = 0;
731 vnet_error_trace_t *t0;
735 b0 = vlib_get_buffer (vm, bi0);
737 if (b0->flags & VLIB_BUFFER_IS_TRACED)
739 t0 = vlib_add_trace (vm, node, b0,
740 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
741 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
742 t0->details_valid = 0;
751 VNET_ERROR_DISPOSITION_DROP,
752 VNET_ERROR_DISPOSITION_PUNT,
753 VNET_ERROR_N_DISPOSITION,
754 } vnet_error_disposition_t;
757 drop_catchup_trace (vlib_main_t * vm,
758 vlib_node_runtime_t * node, vlib_buffer_t * b)
760 /* Can we safely rewind the buffer? If not, fagedaboudit */
761 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
763 vnet_error_trace_t *t;
766 ethernet_header_t *eh;
769 t = vlib_add_trace (vm, node, b, sizeof (*t));
770 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
771 vlib_buffer_advance (b, delta);
773 eh = vlib_buffer_get_current (b);
775 t->mactype = clib_net_to_host_u16 (eh->type);
776 t->details_valid = 1;
779 case ETHERNET_TYPE_IP4:
780 ip4 = (void *) (eh + 1);
781 t->details_valid = 2;
783 t->src.ip4.as_u32 = ip4->src_address.as_u32;
784 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
787 case ETHERNET_TYPE_IP6:
788 ip6 = (void *) (eh + 1);
789 t->details_valid = 2;
791 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
792 sizeof (ip6_address_t));
793 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
794 sizeof (ip6_address_t));
798 /* Dunno, do nothing, leave details_valid alone */
801 /* Restore current data (probably unnecessary) */
802 vlib_buffer_advance (b, -delta);
806 static_always_inline uword
807 interface_drop_punt (vlib_main_t * vm,
808 vlib_node_runtime_t * node,
809 vlib_frame_t * frame,
810 vnet_error_disposition_t disposition)
812 u32 *from, n_left, thread_index, *sw_if_index;
813 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
814 u32 sw_if_indices[VLIB_FRAME_SIZE];
815 vlib_simple_counter_main_t *cm;
816 u16 nexts[VLIB_FRAME_SIZE];
820 vnm = vnet_get_main ();
821 thread_index = vm->thread_index;
822 from = vlib_frame_vector_args (frame);
823 n_left = frame->n_vectors;
825 sw_if_index = sw_if_indices;
827 vlib_get_buffers (vm, from, bufs, n_left);
829 /* "trace add error-drop NNN?" */
830 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
832 /* If pkts aren't otherwise traced... */
833 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
835 /* Trace them from here */
836 node->flags |= VLIB_NODE_FLAG_TRACE;
837 while (n_trace && n_left)
840 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
841 0 /* follow chain */ )))
844 * Here we have a wireshark dissector problem.
845 * Packets may be well-formed, or not. We
846 * must not blow chunks in any case.
848 * Try to produce trace records which will help
849 * folks understand what's going on.
851 drop_catchup_trace (vm, node, b[0]);
859 vlib_set_trace_count (vm, node, n_trace);
861 n_left = frame->n_vectors;
864 if (node->flags & VLIB_NODE_FLAG_TRACE)
865 interface_trace_buffers (vm, node, frame);
867 /* All going to drop regardless, this is just a counting exercise */
868 clib_memset (nexts, 0, sizeof (nexts));
870 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
871 (disposition == VNET_ERROR_DISPOSITION_PUNT
872 ? VNET_INTERFACE_COUNTER_PUNT
873 : VNET_INTERFACE_COUNTER_DROP));
875 /* collect the array of interfaces first ... */
880 /* Prefetch 8 ahead - there's not much going on in each iteration */
881 vlib_prefetch_buffer_header (b[4], LOAD);
882 vlib_prefetch_buffer_header (b[5], LOAD);
883 vlib_prefetch_buffer_header (b[6], LOAD);
884 vlib_prefetch_buffer_header (b[7], LOAD);
886 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
887 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
888 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
889 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
897 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
904 /* ... then count against them in blocks */
905 n_left = frame->n_vectors;
909 vnet_sw_interface_t *sw_if0;
912 off = frame->n_vectors - n_left;
914 sw_if_index = sw_if_indices + off;
916 count = clib_count_equal_u32 (sw_if_index, n_left);
919 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
921 /* Increment super-interface drop/punt counters for
923 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
924 if (sw_if0->sup_sw_if_index != sw_if_index[0])
925 vlib_increment_simple_counter
926 (cm, thread_index, sw_if0->sup_sw_if_index, count);
929 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
931 return frame->n_vectors;
935 pcap_drop_trace (vlib_main_t * vm,
936 vnet_interface_main_t * im,
937 vnet_pcap_t * pp, vlib_frame_t * f)
940 u32 n_left = f->n_vectors;
941 vlib_buffer_t *b0, *p1;
943 i16 save_current_data;
944 u16 save_current_length;
945 vlib_error_main_t *em = &vm->error_main;
949 from = vlib_frame_vector_args (f);
953 if (PREDICT_TRUE (n_left > 1))
955 p1 = vlib_get_buffer (vm, from[1]);
956 vlib_prefetch_buffer_header (p1, LOAD);
960 b0 = vlib_get_buffer (vm, bi0);
964 /* See if we're pointedly ignoring this specific error */
965 if (im->pcap_drop_filter_hash
966 && hash_get (im->pcap_drop_filter_hash, b0->error))
969 do_trace = (pp->pcap_sw_if_index == 0) ||
970 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
973 (do_trace == 0 && pp->filter_classify_table_index != ~0))
975 do_trace = vnet_is_packet_traced_inline
976 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
979 /* Trace all drops, or drops received on a specific interface */
982 save_current_data = b0->current_data;
983 save_current_length = b0->current_length;
986 * Typically, we'll need to rewind the buffer
987 * if l2_hdr_offset is valid, make sure to rewind to the start of
988 * the L2 header. This may not be the buffer start in case we pop-ed
990 * Otherwise, rewind to buffer start and hope for the best.
992 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
994 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
995 vlib_buffer_advance (b0,
996 vnet_buffer (b0)->l2_hdr_offset -
999 else if (b0->current_data > 0)
1000 vlib_buffer_advance (b0, (word) - b0->current_data);
1003 vlib_buffer_t *last = b0;
1004 u32 error_node_index;
1005 int drop_string_len;
1007 /* Length of the error string */
1008 int error_string_len =
1009 clib_strnlen (em->counters_heap[b0->error].name, 128);
1011 /* Dig up the drop node */
1012 error_node_index = vm->node_main.node_by_error[b0->error];
1013 n = vlib_get_node (vm, error_node_index);
1015 /* Length of full drop string, w/ "nodename: " prepended */
1016 drop_string_len = error_string_len + vec_len (n->name) + 2;
1018 /* Find the last buffer in the chain */
1019 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
1020 last = vlib_get_buffer (vm, last->next_buffer);
1023 * Append <nodename>: <error-string> to the capture,
1024 * only if we can do that without allocating a new buffer.
1026 if (PREDICT_TRUE ((last->current_data + last->current_length)
1027 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
1028 - drop_string_len)))
1030 clib_memcpy_fast (last->data + last->current_data +
1031 last->current_length, n->name,
1033 clib_memcpy_fast (last->data + last->current_data +
1034 last->current_length + vec_len (n->name),
1036 clib_memcpy_fast (last->data + last->current_data +
1037 last->current_length + vec_len (n->name) +
1038 2, em->counters_heap[b0->error].name,
1040 last->current_length += drop_string_len;
1041 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1042 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1043 pp->max_bytes_per_pkt);
1044 last->current_length -= drop_string_len;
1045 b0->current_data = save_current_data;
1046 b0->current_length = save_current_length;
1052 * Didn't have space in the last buffer, here's the dropped
1055 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1057 b0->current_data = save_current_data;
1058 b0->current_length = save_current_length;
1063 #ifndef CLIB_MARCH_VARIANT
1065 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1067 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1069 if (im->pcap_drop_filter_hash == 0)
1070 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1073 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1075 hash_unset (im->pcap_drop_filter_hash, error_index);
1077 #endif /* CLIB_MARCH_VARIANT */
1079 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1080 vlib_node_runtime_t * node,
1081 vlib_frame_t * frame)
1083 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1084 vnet_pcap_t *pp = &vlib_global_main.pcap;
1086 if (PREDICT_FALSE (pp->pcap_drop_enable))
1087 pcap_drop_trace (vm, im, pp, frame);
1089 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1092 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1093 vlib_node_runtime_t * node,
1094 vlib_frame_t * frame)
1096 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1100 VLIB_REGISTER_NODE (interface_drop) = {
1101 .name = "error-drop",
1102 .vector_size = sizeof (u32),
1103 .format_trace = format_vnet_error_trace,
1104 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1113 VLIB_REGISTER_NODE (interface_punt) = {
1114 .name = "error-punt",
1115 .vector_size = sizeof (u32),
1116 .format_trace = format_vnet_error_trace,
1117 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1126 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1127 .name = "interface-output",
1128 .vector_size = sizeof (u32),
1133 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1134 vlib_frame_t * from_frame)
1136 vnet_main_t *vnm = vnet_get_main ();
1137 u32 last_sw_if_index = ~0;
1138 vlib_frame_t *to_frame = 0;
1139 vnet_hw_interface_t *hw = 0;
1140 u32 *from, *to_next = 0;
1143 from = vlib_frame_vector_args (from_frame);
1144 n_left_from = from_frame->n_vectors;
1145 while (n_left_from > 0)
1154 b0 = vlib_get_buffer (vm, bi0);
1155 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1157 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1161 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1162 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1164 last_sw_if_index = sw_if_index0;
1165 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1166 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1167 to_next = vlib_frame_vector_args (to_frame);
1172 to_frame->n_vectors++;
1174 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1175 return from_frame->n_vectors;
1179 VLIB_REGISTER_NODE (interface_tx) = {
1180 .function = interface_tx_node_fn,
1181 .name = "interface-tx",
1182 .vector_size = sizeof (u32),
1189 VNET_FEATURE_ARC_INIT (interface_output, static) =
1191 .arc_name = "interface-output",
1192 .start_nodes = VNET_FEATURES (0),
1193 .last_in_arc = "interface-tx",
1194 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1197 VNET_FEATURE_INIT (span_tx, static) = {
1198 .arc_name = "interface-output",
1199 .node_name = "span-output",
1200 .runs_before = VNET_FEATURES ("interface-tx"),
1203 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1204 .arc_name = "interface-output",
1205 .node_name = "ipsec-if-output",
1206 .runs_before = VNET_FEATURES ("interface-tx"),
1209 VNET_FEATURE_INIT (interface_tx, static) = {
1210 .arc_name = "interface-output",
1211 .node_name = "interface-tx",
1216 #ifndef CLIB_MARCH_VARIANT
1218 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1222 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1225 if (hi->output_node_index == 0)
1228 next_index = vlib_node_add_next
1229 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1230 hi->output_node_index);
1231 hi->output_node_next_index = next_index;
1236 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1237 (vnet_per_buffer_interface_output_hw_interface_add_del);
1240 vnet_set_interface_output_node (vnet_main_t * vnm,
1241 u32 hw_if_index, u32 node_index)
1243 ASSERT (node_index);
1244 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1245 u32 next_index = vlib_node_add_next
1246 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1247 hi->output_node_next_index = next_index;
1248 hi->output_node_index = node_index;
1250 #endif /* CLIB_MARCH_VARIANT */
1253 * fd.io coding-style-patch-verification: ON
1256 * eval: (c-set-style "gnu")