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 if (or_flags & VNET_BUFFER_F_OFFLOAD)
342 if (b[0]->flags & VNET_BUFFER_F_OFFLOAD)
343 vnet_calc_checksums_inline
345 b[0]->flags & VNET_BUFFER_F_IS_IP4,
346 b[0]->flags & VNET_BUFFER_F_IS_IP6);
347 if (b[1]->flags & VNET_BUFFER_F_OFFLOAD)
348 vnet_calc_checksums_inline
350 b[1]->flags & VNET_BUFFER_F_IS_IP4,
351 b[1]->flags & VNET_BUFFER_F_IS_IP6);
352 if (b[2]->flags & VNET_BUFFER_F_OFFLOAD)
353 vnet_calc_checksums_inline
355 b[2]->flags & VNET_BUFFER_F_IS_IP4,
356 b[2]->flags & VNET_BUFFER_F_IS_IP6);
357 if (b[3]->flags & VNET_BUFFER_F_OFFLOAD)
358 vnet_calc_checksums_inline
360 b[3]->flags & VNET_BUFFER_F_IS_IP4,
361 b[3]->flags & VNET_BUFFER_F_IS_IP6);
368 while (from + 1 <= from_end && n_left_to_tx >= 1)
379 /* Be grumpy about zero length buffers for benefit of
380 driver tx function. */
381 ASSERT (b[0]->current_length > 0);
383 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
384 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
385 n_bytes += n_bytes_b0;
388 if (PREDICT_FALSE (current_config_index != ~0))
390 vnet_buffer (b[0])->feature_arc_index = arc;
391 b[0]->current_config_index = current_config_index;
394 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
397 vlib_increment_combined_counter (im->combined_sw_if_counters +
398 VNET_INTERFACE_COUNTER_TX,
399 thread_index, tx_swif0, 1,
405 if (b[0]->flags & VNET_BUFFER_F_OFFLOAD)
406 vnet_calc_checksums_inline
408 b[0]->flags & VNET_BUFFER_F_IS_IP4,
409 b[0]->flags & VNET_BUFFER_F_IS_IP6);
414 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
417 /* Update main interface stats. */
418 vlib_increment_combined_counter (im->combined_sw_if_counters
419 + VNET_INTERFACE_COUNTER_TX,
421 rt->sw_if_index, n_packets, n_bytes);
425 static_always_inline void vnet_interface_pcap_tx_trace
426 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
427 int sw_if_index_from_buffer)
429 vnet_main_t *vnm = vnet_get_main ();
430 u32 n_left_from, *from;
432 vnet_pcap_t *pp = &vnm->pcap;
434 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
437 if (sw_if_index_from_buffer == 0)
439 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
440 sw_if_index = rt->sw_if_index;
445 n_left_from = frame->n_vectors;
446 from = vlib_frame_vector_args (frame);
448 while (n_left_from > 0)
450 int classify_filter_result;
452 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
456 if (pp->filter_classify_table_index != ~0)
458 classify_filter_result =
459 vnet_is_packet_traced_inline
460 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
461 if (classify_filter_result)
462 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
466 if (sw_if_index_from_buffer)
467 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
469 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
471 vnet_main_t *vnm = vnet_get_main ();
472 vnet_hw_interface_t *hi =
473 vnet_get_sup_hw_interface (vnm, sw_if_index);
474 /* Capture pkt if not filtered, or if filter hits */
475 if (hi->trace_classify_table_index == ~0 ||
476 vnet_is_packet_traced_inline
477 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
478 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
483 static vlib_node_function_t CLIB_MULTIARCH_FN (vnet_interface_output_node);
486 CLIB_MULTIARCH_FN (vnet_interface_output_node) (vlib_main_t * vm,
487 vlib_node_runtime_t * node,
488 vlib_frame_t * frame)
490 vnet_main_t *vnm = vnet_get_main ();
491 vnet_hw_interface_t *hi;
492 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
493 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
495 vnet_interface_pcap_tx_trace (vm, node, frame,
496 0 /* sw_if_index_from_buffer */ );
498 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
499 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
500 /* do_tx_offloads */ 0);
502 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
503 /* do_tx_offloads */ 1);
506 CLIB_MARCH_FN_REGISTRATION (vnet_interface_output_node);
508 #ifndef CLIB_MARCH_VARIANT
509 vlib_node_function_t *
510 vnet_interface_output_node_get (void)
512 return CLIB_MARCH_FN_POINTER (vnet_interface_output_node);
514 #endif /* CLIB_MARCH_VARIANT */
516 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
517 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
518 vlib_node_runtime_t *
520 vlib_frame_t * frame)
522 vnet_main_t *vnm = vnet_get_main ();
523 u32 n_left_to_next, *from, *to_next;
524 u32 n_left_from, next_index;
526 vnet_interface_pcap_tx_trace (vm, node, frame,
527 1 /* sw_if_index_from_buffer */ );
529 n_left_from = frame->n_vectors;
531 from = vlib_frame_vector_args (frame);
532 next_index = node->cached_next_index;
534 while (n_left_from > 0)
536 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
538 while (n_left_from >= 4 && n_left_to_next >= 2)
540 u32 bi0, bi1, next0, next1;
541 vlib_buffer_t *b0, *b1;
542 vnet_hw_interface_t *hi0, *hi1;
544 /* Prefetch next iteration. */
545 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
546 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
557 b0 = vlib_get_buffer (vm, bi0);
558 b1 = vlib_get_buffer (vm, bi1);
561 vnet_get_sup_hw_interface (vnm,
562 vnet_buffer (b0)->sw_if_index
565 vnet_get_sup_hw_interface (vnm,
566 vnet_buffer (b1)->sw_if_index
569 next0 = hi0->output_node_next_index;
570 next1 = hi1->output_node_next_index;
572 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
573 n_left_to_next, bi0, bi1, next0,
577 while (n_left_from > 0 && n_left_to_next > 0)
581 vnet_hw_interface_t *hi0;
590 b0 = vlib_get_buffer (vm, bi0);
593 vnet_get_sup_hw_interface (vnm,
594 vnet_buffer (b0)->sw_if_index
597 next0 = hi0->output_node_next_index;
599 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
600 n_left_to_next, bi0, next0);
603 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
606 return frame->n_vectors;
609 typedef struct vnet_error_trace_t_
616 ip46_address_t src, dst;
617 } vnet_error_trace_t;
620 format_vnet_error_trace (u8 * s, va_list * va)
622 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
623 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
624 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
626 /* Normal, non-catchup trace */
627 if (t->details_valid == 0)
629 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
630 vnet_get_main (), t->sw_if_index);
632 else if (t->details_valid == 1)
634 /* The trace capture code didn't understant the mactype */
635 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
637 else if (t->details_valid == 2)
639 /* Dump the src/dst addresses */
641 s = format (s, "IP4: %U -> %U",
642 format_ip4_address, &t->src.ip4,
643 format_ip4_address, &t->dst.ip4);
645 s = format (s, "IP6: %U -> %U",
646 format_ip6_address, &t->src.ip6,
647 format_ip6_address, &t->dst.ip6);
653 interface_trace_buffers (vlib_main_t * vm,
654 vlib_node_runtime_t * node, vlib_frame_t * frame)
656 u32 n_left, *buffers;
658 buffers = vlib_frame_vector_args (frame);
659 n_left = frame->n_vectors;
664 vlib_buffer_t *b0, *b1;
665 vnet_error_trace_t *t0, *t1;
667 /* Prefetch next iteration. */
668 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
669 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
674 b0 = vlib_get_buffer (vm, bi0);
675 b1 = vlib_get_buffer (vm, bi1);
677 if (b0->flags & VLIB_BUFFER_IS_TRACED)
679 t0 = vlib_add_trace (vm, node, b0,
680 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
681 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
682 t0->details_valid = 0;
684 if (b1->flags & VLIB_BUFFER_IS_TRACED)
686 t1 = vlib_add_trace (vm, node, b1,
687 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
688 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
689 t1->details_valid = 0;
699 vnet_error_trace_t *t0;
703 b0 = vlib_get_buffer (vm, bi0);
705 if (b0->flags & VLIB_BUFFER_IS_TRACED)
707 t0 = vlib_add_trace (vm, node, b0,
708 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
709 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
710 t0->details_valid = 0;
719 VNET_ERROR_DISPOSITION_DROP,
720 VNET_ERROR_DISPOSITION_PUNT,
721 VNET_ERROR_N_DISPOSITION,
722 } vnet_error_disposition_t;
725 drop_catchup_trace (vlib_main_t * vm,
726 vlib_node_runtime_t * node, vlib_buffer_t * b)
728 /* Can we safely rewind the buffer? If not, fagedaboudit */
729 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
731 vnet_error_trace_t *t;
734 ethernet_header_t *eh;
737 t = vlib_add_trace (vm, node, b, sizeof (*t));
738 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
739 vlib_buffer_advance (b, delta);
741 eh = vlib_buffer_get_current (b);
743 t->mactype = clib_net_to_host_u16 (eh->type);
744 t->details_valid = 1;
747 case ETHERNET_TYPE_IP4:
748 ip4 = (void *) (eh + 1);
749 t->details_valid = 2;
751 t->src.ip4.as_u32 = ip4->src_address.as_u32;
752 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
755 case ETHERNET_TYPE_IP6:
756 ip6 = (void *) (eh + 1);
757 t->details_valid = 2;
759 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
760 sizeof (ip6_address_t));
761 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
762 sizeof (ip6_address_t));
766 /* Dunno, do nothing, leave details_valid alone */
769 /* Restore current data (probably unnecessary) */
770 vlib_buffer_advance (b, -delta);
774 static_always_inline uword
775 interface_drop_punt (vlib_main_t * vm,
776 vlib_node_runtime_t * node,
777 vlib_frame_t * frame,
778 vnet_error_disposition_t disposition)
780 u32 *from, n_left, thread_index, *sw_if_index;
781 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
782 u32 sw_if_indices[VLIB_FRAME_SIZE];
783 vlib_simple_counter_main_t *cm;
784 u16 nexts[VLIB_FRAME_SIZE];
788 vnm = vnet_get_main ();
789 thread_index = vm->thread_index;
790 from = vlib_frame_vector_args (frame);
791 n_left = frame->n_vectors;
793 sw_if_index = sw_if_indices;
795 vlib_get_buffers (vm, from, bufs, n_left);
797 /* "trace add error-drop NNN?" */
798 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
800 /* If pkts aren't otherwise traced... */
801 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
803 /* Trace them from here */
804 node->flags |= VLIB_NODE_FLAG_TRACE;
805 while (n_trace && n_left)
808 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
809 0 /* follow chain */ )))
812 * Here we have a wireshark dissector problem.
813 * Packets may be well-formed, or not. We
814 * must not blow chunks in any case.
816 * Try to produce trace records which will help
817 * folks understand what's going on.
819 drop_catchup_trace (vm, node, b[0]);
827 vlib_set_trace_count (vm, node, n_trace);
829 n_left = frame->n_vectors;
832 if (node->flags & VLIB_NODE_FLAG_TRACE)
833 interface_trace_buffers (vm, node, frame);
835 /* All going to drop regardless, this is just a counting exercise */
836 clib_memset (nexts, 0, sizeof (nexts));
838 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
839 (disposition == VNET_ERROR_DISPOSITION_PUNT
840 ? VNET_INTERFACE_COUNTER_PUNT
841 : VNET_INTERFACE_COUNTER_DROP));
843 /* collect the array of interfaces first ... */
848 /* Prefetch 8 ahead - there's not much going on in each iteration */
849 vlib_prefetch_buffer_header (b[4], LOAD);
850 vlib_prefetch_buffer_header (b[5], LOAD);
851 vlib_prefetch_buffer_header (b[6], LOAD);
852 vlib_prefetch_buffer_header (b[7], LOAD);
854 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
855 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
856 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
857 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
865 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
872 /* ... then count against them in blocks */
873 n_left = frame->n_vectors;
877 vnet_sw_interface_t *sw_if0;
880 off = frame->n_vectors - n_left;
882 sw_if_index = sw_if_indices + off;
884 count = clib_count_equal_u32 (sw_if_index, n_left);
887 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
889 /* Increment super-interface drop/punt counters for
891 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
892 if (sw_if0->sup_sw_if_index != sw_if_index[0])
893 vlib_increment_simple_counter
894 (cm, thread_index, sw_if0->sup_sw_if_index, count);
897 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
899 return frame->n_vectors;
903 pcap_drop_trace (vlib_main_t * vm,
904 vnet_interface_main_t * im,
905 vnet_pcap_t * pp, vlib_frame_t * f)
908 u32 n_left = f->n_vectors;
909 vlib_buffer_t *b0, *p1;
911 i16 save_current_data;
912 u16 save_current_length;
913 vlib_error_main_t *em = &vm->error_main;
917 from = vlib_frame_vector_args (f);
921 if (PREDICT_TRUE (n_left > 1))
923 p1 = vlib_get_buffer (vm, from[1]);
924 vlib_prefetch_buffer_header (p1, LOAD);
928 b0 = vlib_get_buffer (vm, bi0);
932 /* See if we're pointedly ignoring this specific error */
933 if (im->pcap_drop_filter_hash
934 && hash_get (im->pcap_drop_filter_hash, b0->error))
937 do_trace = (pp->pcap_sw_if_index == 0) ||
938 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
941 (do_trace == 0 && pp->filter_classify_table_index != ~0))
943 do_trace = vnet_is_packet_traced_inline
944 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
947 /* Trace all drops, or drops received on a specific interface */
950 save_current_data = b0->current_data;
951 save_current_length = b0->current_length;
954 * Typically, we'll need to rewind the buffer
955 * if l2_hdr_offset is valid, make sure to rewind to the start of
956 * the L2 header. This may not be the buffer start in case we pop-ed
958 * Otherwise, rewind to buffer start and hope for the best.
960 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
962 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
963 vlib_buffer_advance (b0,
964 vnet_buffer (b0)->l2_hdr_offset -
967 else if (b0->current_data > 0)
968 vlib_buffer_advance (b0, (word) - b0->current_data);
971 vlib_buffer_t *last = b0;
972 u32 error_node_index;
975 /* Length of the error string */
976 int error_string_len =
977 clib_strnlen (em->counters_heap[b0->error].name, 128);
979 /* Dig up the drop node */
980 error_node_index = vm->node_main.node_by_error[b0->error];
981 n = vlib_get_node (vm, error_node_index);
983 /* Length of full drop string, w/ "nodename: " prepended */
984 drop_string_len = error_string_len + vec_len (n->name) + 2;
986 /* Find the last buffer in the chain */
987 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
988 last = vlib_get_buffer (vm, last->next_buffer);
991 * Append <nodename>: <error-string> to the capture,
992 * only if we can do that without allocating a new buffer.
994 if (PREDICT_TRUE ((last->current_data + last->current_length)
995 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
998 clib_memcpy_fast (last->data + last->current_data +
999 last->current_length, n->name,
1001 clib_memcpy_fast (last->data + last->current_data +
1002 last->current_length + vec_len (n->name),
1004 clib_memcpy_fast (last->data + last->current_data +
1005 last->current_length + vec_len (n->name) +
1006 2, em->counters_heap[b0->error].name,
1008 last->current_length += drop_string_len;
1009 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1010 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1011 pp->max_bytes_per_pkt);
1012 last->current_length -= drop_string_len;
1013 b0->current_data = save_current_data;
1014 b0->current_length = save_current_length;
1020 * Didn't have space in the last buffer, here's the dropped
1023 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1025 b0->current_data = save_current_data;
1026 b0->current_length = save_current_length;
1031 #ifndef CLIB_MARCH_VARIANT
1033 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1035 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1037 if (im->pcap_drop_filter_hash == 0)
1038 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1041 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1043 hash_unset (im->pcap_drop_filter_hash, error_index);
1045 #endif /* CLIB_MARCH_VARIANT */
1047 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1048 vlib_node_runtime_t * node,
1049 vlib_frame_t * frame)
1051 vnet_main_t *vnm = vnet_get_main ();
1052 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1053 vnet_pcap_t *pp = &vnm->pcap;
1055 if (PREDICT_FALSE (pp->pcap_drop_enable))
1056 pcap_drop_trace (vm, im, pp, frame);
1058 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1061 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1062 vlib_node_runtime_t * node,
1063 vlib_frame_t * frame)
1065 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1069 VLIB_REGISTER_NODE (interface_drop) = {
1070 .name = "error-drop",
1071 .vector_size = sizeof (u32),
1072 .format_trace = format_vnet_error_trace,
1073 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1082 VLIB_REGISTER_NODE (interface_punt) = {
1083 .name = "error-punt",
1084 .vector_size = sizeof (u32),
1085 .format_trace = format_vnet_error_trace,
1086 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1095 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1096 .name = "interface-output",
1097 .vector_size = sizeof (u32),
1102 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1103 vlib_frame_t * from_frame)
1105 vnet_main_t *vnm = vnet_get_main ();
1106 u32 last_sw_if_index = ~0;
1107 vlib_frame_t *to_frame = 0;
1108 vnet_hw_interface_t *hw = 0;
1109 u32 *from, *to_next = 0;
1112 from = vlib_frame_vector_args (from_frame);
1113 n_left_from = from_frame->n_vectors;
1114 while (n_left_from > 0)
1123 b0 = vlib_get_buffer (vm, bi0);
1124 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1126 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1130 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1131 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1133 last_sw_if_index = sw_if_index0;
1134 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1135 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1136 to_next = vlib_frame_vector_args (to_frame);
1141 to_frame->n_vectors++;
1143 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1144 return from_frame->n_vectors;
1148 VLIB_REGISTER_NODE (interface_tx) = {
1149 .function = interface_tx_node_fn,
1150 .name = "interface-tx",
1151 .vector_size = sizeof (u32),
1158 VNET_FEATURE_ARC_INIT (interface_output, static) =
1160 .arc_name = "interface-output",
1161 .start_nodes = VNET_FEATURES (0),
1162 .last_in_arc = "interface-tx",
1163 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1166 VNET_FEATURE_INIT (span_tx, static) = {
1167 .arc_name = "interface-output",
1168 .node_name = "span-output",
1169 .runs_before = VNET_FEATURES ("interface-tx"),
1172 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1173 .arc_name = "interface-output",
1174 .node_name = "ipsec-if-output",
1175 .runs_before = VNET_FEATURES ("interface-tx"),
1178 VNET_FEATURE_INIT (interface_tx, static) = {
1179 .arc_name = "interface-output",
1180 .node_name = "interface-tx",
1185 #ifndef CLIB_MARCH_VARIANT
1187 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1191 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1194 if (hi->output_node_index == 0)
1197 next_index = vlib_node_add_next
1198 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1199 hi->output_node_index);
1200 hi->output_node_next_index = next_index;
1205 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1206 (vnet_per_buffer_interface_output_hw_interface_add_del);
1209 vnet_set_interface_output_node (vnet_main_t * vnm,
1210 u32 hw_if_index, u32 node_index)
1212 ASSERT (node_index);
1213 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1214 u32 next_index = vlib_node_add_next
1215 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1216 hi->output_node_next_index = next_index;
1217 hi->output_node_index = node_index;
1219 #endif /* CLIB_MARCH_VARIANT */
1222 * fd.io coding-style-patch-verification: ON
1225 * eval: (c-set-style "gnu")