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)
180 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
181 u32 ti = vm->thread_index;
185 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
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);
194 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
196 /* Be grumpy about zero length buffers for benefit of
197 driver tx function. */
198 ASSERT (b[0]->current_length > 0);
199 ASSERT (b[1]->current_length > 0);
200 ASSERT (b[2]->current_length > 0);
201 ASSERT (b[3]->current_length > 0);
203 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
204 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
205 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
206 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
208 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
209 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
210 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
211 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
213 /* update vlan subif tx counts, if required */
214 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
215 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
217 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
218 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
220 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
221 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
223 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
224 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
226 if (PREDICT_FALSE (config_index != ~0))
228 vnet_buffer (b[0])->feature_arc_index = arc;
229 b[0]->current_config_index = config_index;
230 vnet_buffer (b[1])->feature_arc_index = arc;
231 b[1]->current_config_index = config_index;
232 vnet_buffer (b[2])->feature_arc_index = arc;
233 b[2]->current_config_index = config_index;
234 vnet_buffer (b[3])->feature_arc_index = arc;
235 b[3]->current_config_index = config_index;
238 if (do_tx_offloads && (or_flags & VNET_BUFFER_F_OFFLOAD))
240 vnet_interface_output_handle_offload (vm, b[0]);
241 vnet_interface_output_handle_offload (vm, b[1]);
242 vnet_interface_output_handle_offload (vm, b[2]);
243 vnet_interface_output_handle_offload (vm, b[3]);
254 /* Be grumpy about zero length buffers for benefit of
255 driver tx function. */
256 ASSERT (b[0]->current_length > 0);
258 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
259 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
261 if (PREDICT_FALSE (config_index != ~0))
263 vnet_buffer (b[0])->feature_arc_index = arc;
264 b[0]->current_config_index = config_index;
267 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
268 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
271 vnet_interface_output_handle_offload (vm, b[0]);
280 static_always_inline void vnet_interface_pcap_tx_trace
281 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
282 int sw_if_index_from_buffer)
284 vnet_main_t *vnm = vnet_get_main ();
285 u32 n_left_from, *from;
287 vnet_pcap_t *pp = &vnm->pcap;
289 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
292 if (sw_if_index_from_buffer == 0)
294 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
295 sw_if_index = rt->sw_if_index;
300 n_left_from = frame->n_vectors;
301 from = vlib_frame_vector_args (frame);
303 while (n_left_from > 0)
305 int classify_filter_result;
307 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
311 if (pp->filter_classify_table_index != ~0)
313 classify_filter_result =
314 vnet_is_packet_traced_inline
315 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
316 if (classify_filter_result)
317 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
321 if (sw_if_index_from_buffer)
322 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
324 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
326 vnet_main_t *vnm = vnet_get_main ();
327 vnet_hw_interface_t *hi =
328 vnet_get_sup_hw_interface (vnm, sw_if_index);
329 /* Capture pkt if not filtered, or if filter hits */
330 if (hi->trace_classify_table_index == ~0 ||
331 vnet_is_packet_traced_inline
332 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
333 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
338 VLIB_NODE_FN (vnet_interface_output_node)
339 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
341 vnet_main_t *vnm = vnet_get_main ();
342 vnet_interface_main_t *im = &vnm->interface_main;
343 vlib_combined_counter_main_t *ccm;
344 vnet_hw_interface_t *hi;
345 vnet_sw_interface_t *si;
346 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
347 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
348 u32 n_bytes, n_buffers = frame->n_vectors;
349 u32 config_index = ~0;
350 u32 sw_if_index = rt->sw_if_index;
351 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
352 u32 ti = vm->thread_index;
353 u8 arc = im->output_feature_arc_index;
356 if (node->flags & VLIB_NODE_FLAG_TRACE)
357 vnet_interface_output_trace (vm, node, frame, n_buffers);
359 from = vlib_frame_vector_args (frame);
362 return vlib_error_drop_buffers (
364 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
365 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
367 vnet_interface_pcap_tx_trace (vm, node, frame,
368 0 /* sw_if_index_from_buffer */ );
370 vlib_get_buffers (vm, from, bufs, n_buffers);
372 si = vnet_get_sw_interface (vnm, sw_if_index);
373 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
375 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
376 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
378 vlib_simple_counter_main_t *cm;
380 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
381 VNET_INTERFACE_COUNTER_TX_ERROR);
382 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
384 return vlib_error_drop_buffers (
386 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
387 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
390 /* interface-output feature arc handling */
391 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
393 vnet_feature_config_main_t *fcm;
394 fcm = vnet_feature_get_config_main (arc);
395 config_index = vnet_get_feature_config_index (arc, sw_if_index);
396 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
399 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
401 if (hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM)
402 n_bytes = vnet_interface_output_node_inline (vm, sw_if_index, ccm, bufs,
403 config_index, arc, n_buffers,
404 /* do_tx_offloads */ 0);
406 n_bytes = vnet_interface_output_node_inline (vm, sw_if_index, ccm, bufs,
407 config_index, arc, n_buffers,
408 /* do_tx_offloads */ 1);
410 vlib_buffer_enqueue_to_single_next (vm, node, vlib_frame_vector_args (frame),
411 next_index, frame->n_vectors);
413 /* Update main interface stats. */
414 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
418 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
419 .name = "interface-output-template",
420 .vector_size = sizeof (u32),
423 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
424 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
425 vlib_node_runtime_t *
427 vlib_frame_t * frame)
429 vnet_main_t *vnm = vnet_get_main ();
430 u32 n_left_to_next, *from, *to_next;
431 u32 n_left_from, next_index;
433 vnet_interface_pcap_tx_trace (vm, node, frame,
434 1 /* sw_if_index_from_buffer */ );
436 n_left_from = frame->n_vectors;
438 from = vlib_frame_vector_args (frame);
439 next_index = node->cached_next_index;
441 while (n_left_from > 0)
443 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
445 while (n_left_from >= 4 && n_left_to_next >= 2)
447 u32 bi0, bi1, next0, next1;
448 vlib_buffer_t *b0, *b1;
449 vnet_hw_interface_t *hi0, *hi1;
451 /* Prefetch next iteration. */
452 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
453 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
464 b0 = vlib_get_buffer (vm, bi0);
465 b1 = vlib_get_buffer (vm, bi1);
468 vnet_get_sup_hw_interface (vnm,
469 vnet_buffer (b0)->sw_if_index
472 vnet_get_sup_hw_interface (vnm,
473 vnet_buffer (b1)->sw_if_index
476 next0 = hi0->output_node_next_index;
477 next1 = hi1->output_node_next_index;
479 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
480 n_left_to_next, bi0, bi1, next0,
484 while (n_left_from > 0 && n_left_to_next > 0)
488 vnet_hw_interface_t *hi0;
497 b0 = vlib_get_buffer (vm, bi0);
500 vnet_get_sup_hw_interface (vnm,
501 vnet_buffer (b0)->sw_if_index
504 next0 = hi0->output_node_next_index;
506 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
507 n_left_to_next, bi0, next0);
510 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
513 return frame->n_vectors;
516 typedef struct vnet_error_trace_t_
523 ip46_address_t src, dst;
524 } vnet_error_trace_t;
527 format_vnet_error_trace (u8 * s, va_list * va)
529 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
530 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
531 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
533 /* Normal, non-catchup trace */
534 if (t->details_valid == 0)
536 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
537 vnet_get_main (), t->sw_if_index);
539 else if (t->details_valid == 1)
541 /* The trace capture code didn't understant the mactype */
542 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
544 else if (t->details_valid == 2)
546 /* Dump the src/dst addresses */
548 s = format (s, "IP4: %U -> %U",
549 format_ip4_address, &t->src.ip4,
550 format_ip4_address, &t->dst.ip4);
552 s = format (s, "IP6: %U -> %U",
553 format_ip6_address, &t->src.ip6,
554 format_ip6_address, &t->dst.ip6);
560 interface_trace_buffers (vlib_main_t * vm,
561 vlib_node_runtime_t * node, vlib_frame_t * frame)
563 u32 n_left, *buffers;
565 buffers = vlib_frame_vector_args (frame);
566 n_left = frame->n_vectors;
571 vlib_buffer_t *b0, *b1;
572 vnet_error_trace_t *t0, *t1;
574 /* Prefetch next iteration. */
575 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
576 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
581 b0 = vlib_get_buffer (vm, bi0);
582 b1 = vlib_get_buffer (vm, bi1);
584 if (b0->flags & VLIB_BUFFER_IS_TRACED)
586 t0 = vlib_add_trace (vm, node, b0,
587 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
588 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
589 t0->details_valid = 0;
591 if (b1->flags & VLIB_BUFFER_IS_TRACED)
593 t1 = vlib_add_trace (vm, node, b1,
594 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
595 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
596 t1->details_valid = 0;
606 vnet_error_trace_t *t0;
610 b0 = vlib_get_buffer (vm, bi0);
612 if (b0->flags & VLIB_BUFFER_IS_TRACED)
614 t0 = vlib_add_trace (vm, node, b0,
615 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
616 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
617 t0->details_valid = 0;
626 VNET_ERROR_DISPOSITION_DROP,
627 VNET_ERROR_DISPOSITION_PUNT,
628 VNET_ERROR_N_DISPOSITION,
629 } vnet_error_disposition_t;
632 drop_catchup_trace (vlib_main_t * vm,
633 vlib_node_runtime_t * node, vlib_buffer_t * b)
635 /* Can we safely rewind the buffer? If not, fagedaboudit */
636 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
638 vnet_error_trace_t *t;
641 ethernet_header_t *eh;
644 t = vlib_add_trace (vm, node, b, sizeof (*t));
645 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
646 vlib_buffer_advance (b, delta);
648 eh = vlib_buffer_get_current (b);
650 t->mactype = clib_net_to_host_u16 (eh->type);
651 t->details_valid = 1;
654 case ETHERNET_TYPE_IP4:
655 ip4 = (void *) (eh + 1);
656 t->details_valid = 2;
658 t->src.ip4.as_u32 = ip4->src_address.as_u32;
659 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
662 case ETHERNET_TYPE_IP6:
663 ip6 = (void *) (eh + 1);
664 t->details_valid = 2;
666 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
667 sizeof (ip6_address_t));
668 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
669 sizeof (ip6_address_t));
673 /* Dunno, do nothing, leave details_valid alone */
676 /* Restore current data (probably unnecessary) */
677 vlib_buffer_advance (b, -delta);
681 static_always_inline uword
682 interface_drop_punt (vlib_main_t * vm,
683 vlib_node_runtime_t * node,
684 vlib_frame_t * frame,
685 vnet_error_disposition_t disposition)
687 u32 *from, n_left, thread_index, *sw_if_index;
688 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
689 u32 sw_if_indices[VLIB_FRAME_SIZE];
690 vlib_simple_counter_main_t *cm;
691 u16 nexts[VLIB_FRAME_SIZE];
695 vnm = vnet_get_main ();
696 thread_index = vm->thread_index;
697 from = vlib_frame_vector_args (frame);
698 n_left = frame->n_vectors;
700 sw_if_index = sw_if_indices;
702 vlib_get_buffers (vm, from, bufs, n_left);
704 /* "trace add error-drop NNN?" */
705 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
707 /* If pkts aren't otherwise traced... */
708 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
710 /* Trace them from here */
711 node->flags |= VLIB_NODE_FLAG_TRACE;
712 while (n_trace && n_left)
715 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
716 0 /* follow chain */ )))
719 * Here we have a wireshark dissector problem.
720 * Packets may be well-formed, or not. We
721 * must not blow chunks in any case.
723 * Try to produce trace records which will help
724 * folks understand what's going on.
726 drop_catchup_trace (vm, node, b[0]);
734 vlib_set_trace_count (vm, node, n_trace);
736 n_left = frame->n_vectors;
739 if (node->flags & VLIB_NODE_FLAG_TRACE)
740 interface_trace_buffers (vm, node, frame);
742 /* All going to drop regardless, this is just a counting exercise */
743 clib_memset (nexts, 0, sizeof (nexts));
745 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
746 (disposition == VNET_ERROR_DISPOSITION_PUNT
747 ? VNET_INTERFACE_COUNTER_PUNT
748 : VNET_INTERFACE_COUNTER_DROP));
750 /* collect the array of interfaces first ... */
755 /* Prefetch 8 ahead - there's not much going on in each iteration */
756 vlib_prefetch_buffer_header (b[4], LOAD);
757 vlib_prefetch_buffer_header (b[5], LOAD);
758 vlib_prefetch_buffer_header (b[6], LOAD);
759 vlib_prefetch_buffer_header (b[7], LOAD);
761 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
762 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
763 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
764 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
772 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
779 /* ... then count against them in blocks */
780 n_left = frame->n_vectors;
784 vnet_sw_interface_t *sw_if0;
787 off = frame->n_vectors - n_left;
789 sw_if_index = sw_if_indices + off;
791 count = clib_count_equal_u32 (sw_if_index, n_left);
794 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
796 /* Increment super-interface drop/punt counters for
798 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
799 if (sw_if0->sup_sw_if_index != sw_if_index[0])
800 vlib_increment_simple_counter
801 (cm, thread_index, sw_if0->sup_sw_if_index, count);
804 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
806 return frame->n_vectors;
810 pcap_drop_trace (vlib_main_t * vm,
811 vnet_interface_main_t * im,
812 vnet_pcap_t * pp, vlib_frame_t * f)
815 u32 n_left = f->n_vectors;
816 vlib_buffer_t *b0, *p1;
818 i16 save_current_data;
819 u16 save_current_length;
820 vlib_error_main_t *em = &vm->error_main;
824 from = vlib_frame_vector_args (f);
828 if (PREDICT_TRUE (n_left > 1))
830 p1 = vlib_get_buffer (vm, from[1]);
831 vlib_prefetch_buffer_header (p1, LOAD);
835 b0 = vlib_get_buffer (vm, bi0);
839 /* See if we're pointedly ignoring this specific error */
840 if (im->pcap_drop_filter_hash
841 && hash_get (im->pcap_drop_filter_hash, b0->error))
844 do_trace = (pp->pcap_sw_if_index == 0) ||
845 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
848 (do_trace == 0 && pp->filter_classify_table_index != ~0))
850 do_trace = vnet_is_packet_traced_inline
851 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
854 /* Trace all drops, or drops received on a specific interface */
857 save_current_data = b0->current_data;
858 save_current_length = b0->current_length;
861 * Typically, we'll need to rewind the buffer
862 * if l2_hdr_offset is valid, make sure to rewind to the start of
863 * the L2 header. This may not be the buffer start in case we pop-ed
865 * Otherwise, rewind to buffer start and hope for the best.
867 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
869 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
870 vlib_buffer_advance (b0,
871 vnet_buffer (b0)->l2_hdr_offset -
874 else if (b0->current_data > 0)
875 vlib_buffer_advance (b0, (word) - b0->current_data);
878 vlib_buffer_t *last = b0;
879 u32 error_node_index;
882 /* Length of the error string */
883 int error_string_len =
884 clib_strnlen (em->counters_heap[b0->error].name, 128);
886 /* Dig up the drop node */
887 error_node_index = vm->node_main.node_by_error[b0->error];
888 n = vlib_get_node (vm, error_node_index);
890 /* Length of full drop string, w/ "nodename: " prepended */
891 drop_string_len = error_string_len + vec_len (n->name) + 2;
893 /* Find the last buffer in the chain */
894 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
895 last = vlib_get_buffer (vm, last->next_buffer);
898 * Append <nodename>: <error-string> to the capture,
899 * only if we can do that without allocating a new buffer.
901 if (PREDICT_TRUE ((last->current_data + last->current_length)
902 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
905 clib_memcpy_fast (last->data + last->current_data +
906 last->current_length, n->name,
908 clib_memcpy_fast (last->data + last->current_data +
909 last->current_length + vec_len (n->name),
911 clib_memcpy_fast (last->data + last->current_data +
912 last->current_length + vec_len (n->name) +
913 2, em->counters_heap[b0->error].name,
915 last->current_length += drop_string_len;
916 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
917 pcap_add_buffer (&pp->pcap_main, vm, bi0,
918 pp->max_bytes_per_pkt);
919 last->current_length -= drop_string_len;
920 b0->current_data = save_current_data;
921 b0->current_length = save_current_length;
927 * Didn't have space in the last buffer, here's the dropped
930 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
932 b0->current_data = save_current_data;
933 b0->current_length = save_current_length;
938 #ifndef CLIB_MARCH_VARIANT
940 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
942 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
944 if (im->pcap_drop_filter_hash == 0)
945 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
948 hash_set (im->pcap_drop_filter_hash, error_index, 1);
950 hash_unset (im->pcap_drop_filter_hash, error_index);
952 #endif /* CLIB_MARCH_VARIANT */
954 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
955 vlib_node_runtime_t * node,
956 vlib_frame_t * frame)
958 vnet_main_t *vnm = vnet_get_main ();
959 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
960 vnet_pcap_t *pp = &vnm->pcap;
962 if (PREDICT_FALSE (pp->pcap_drop_enable))
963 pcap_drop_trace (vm, im, pp, frame);
965 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
968 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
969 vlib_node_runtime_t * node,
970 vlib_frame_t * frame)
972 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
976 VLIB_REGISTER_NODE (interface_drop) = {
977 .name = "error-drop",
978 .vector_size = sizeof (u32),
979 .format_trace = format_vnet_error_trace,
980 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
989 VLIB_REGISTER_NODE (interface_punt) = {
990 .name = "error-punt",
991 .vector_size = sizeof (u32),
992 .format_trace = format_vnet_error_trace,
993 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1002 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1003 .name = "interface-output",
1004 .vector_size = sizeof (u32),
1009 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1010 vlib_frame_t * from_frame)
1012 vnet_main_t *vnm = vnet_get_main ();
1013 u32 last_sw_if_index = ~0;
1014 vlib_frame_t *to_frame = 0;
1015 vnet_hw_interface_t *hw = 0;
1016 u32 *from, *to_next = 0;
1019 from = vlib_frame_vector_args (from_frame);
1020 n_left_from = from_frame->n_vectors;
1021 while (n_left_from > 0)
1030 b0 = vlib_get_buffer (vm, bi0);
1031 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1033 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1037 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1038 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1040 last_sw_if_index = sw_if_index0;
1041 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1042 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1043 to_next = vlib_frame_vector_args (to_frame);
1048 to_frame->n_vectors++;
1050 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1051 return from_frame->n_vectors;
1055 VLIB_REGISTER_NODE (interface_tx) = {
1056 .function = interface_tx_node_fn,
1057 .name = "interface-tx",
1058 .vector_size = sizeof (u32),
1065 VNET_FEATURE_ARC_INIT (interface_output, static) =
1067 .arc_name = "interface-output",
1068 .start_nodes = VNET_FEATURES (0),
1069 .last_in_arc = "interface-tx",
1070 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1073 VNET_FEATURE_INIT (span_tx, static) = {
1074 .arc_name = "interface-output",
1075 .node_name = "span-output",
1076 .runs_before = VNET_FEATURES ("interface-tx"),
1079 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1080 .arc_name = "interface-output",
1081 .node_name = "ipsec-if-output",
1082 .runs_before = VNET_FEATURES ("interface-tx"),
1085 VNET_FEATURE_INIT (interface_tx, static) = {
1086 .arc_name = "interface-output",
1087 .node_name = "interface-tx",
1092 #ifndef CLIB_MARCH_VARIANT
1094 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1098 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1101 if (hi->output_node_index == 0)
1104 next_index = vlib_node_add_next
1105 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1106 hi->output_node_index);
1107 hi->output_node_next_index = next_index;
1112 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1113 (vnet_per_buffer_interface_output_hw_interface_add_del);
1116 vnet_set_interface_output_node (vnet_main_t * vnm,
1117 u32 hw_if_index, u32 node_index)
1119 ASSERT (node_index);
1120 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1121 u32 next_index = vlib_node_add_next
1122 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1123 hi->output_node_next_index = next_index;
1124 hi->output_node_index = node_index;
1126 #endif /* CLIB_MARCH_VARIANT */
1129 * fd.io coding-style-patch-verification: ON
1132 * eval: (c-set-style "gnu")