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/pcap_classify.h>
49 #include <vnet/interface_output.h>
50 #include <vppinfra/vector_funcs.h>
56 u8 data[128 - 2 * sizeof (u32)];
58 interface_output_trace_t;
60 #ifndef CLIB_MARCH_VARIANT
62 format_vnet_interface_output_trace (u8 * s, va_list * va)
64 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
65 vlib_node_t *node = va_arg (*va, vlib_node_t *);
66 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
67 vnet_main_t *vnm = vnet_get_main ();
68 vnet_sw_interface_t *si;
71 if (t->sw_if_index != (u32) ~ 0)
73 indent = format_get_indent (s);
75 if (pool_is_free_index
76 (vnm->interface_main.sw_interfaces, t->sw_if_index))
78 /* the interface may have been deleted by the time the trace is printed */
79 s = format (s, "sw_if_index: %d ", t->sw_if_index);
83 si = vnet_get_sw_interface (vnm, t->sw_if_index);
85 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
89 format (s, "\n%U%U", format_white_space, indent,
90 node->format_buffer ? node->format_buffer : format_hex_bytes,
91 t->data, sizeof (t->data));
95 #endif /* CLIB_MARCH_VARIANT */
98 vnet_interface_output_trace (vlib_main_t * vm,
99 vlib_node_runtime_t * node,
100 vlib_frame_t * frame, uword n_buffers)
105 from = vlib_frame_vector_args (frame);
110 vlib_buffer_t *b0, *b1;
111 interface_output_trace_t *t0, *t1;
113 /* Prefetch next iteration. */
114 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
115 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
120 b0 = vlib_get_buffer (vm, bi0);
121 b1 = vlib_get_buffer (vm, bi1);
123 if (b0->flags & VLIB_BUFFER_IS_TRACED)
125 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
126 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
127 t0->flags = b0->flags;
128 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
131 if (b1->flags & VLIB_BUFFER_IS_TRACED)
133 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
134 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
135 t1->flags = b1->flags;
136 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
147 interface_output_trace_t *t0;
151 b0 = vlib_get_buffer (vm, bi0);
153 if (b0->flags & VLIB_BUFFER_IS_TRACED)
155 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
156 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
157 t0->flags = b0->flags;
158 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
166 static_always_inline void
167 vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b)
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)
313 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
317 if (sw_if_index_from_buffer)
318 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
320 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
321 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
325 static_always_inline void
326 store_tx_frame_scalar_data (vnet_hw_if_output_node_runtime_t *r,
327 vnet_hw_if_tx_frame_t *tf)
330 clib_memcpy_fast (tf, &r->frame, sizeof (vnet_hw_if_tx_frame_t));
333 static_always_inline void
334 enqueu_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
335 vnet_hw_interface_t *hi, u32 *from, u32 n_vectors)
337 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
338 vnet_hw_if_output_node_runtime_t *r = 0;
339 u32 n_free, n_copy, *to;
340 vnet_hw_if_tx_frame_t *tf;
343 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
345 if (hi->output_node_thread_runtimes)
346 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
348 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
349 tf = vlib_frame_scalar_args (f);
351 if (f->n_vectors > 0 && (r == 0 || tf->queue_id == r->frame.queue_id))
353 /* append current next frame */
354 n_free = VLIB_FRAME_SIZE - f->n_vectors;
355 n_copy = clib_min (n_vectors, n_free);
357 to = vlib_frame_vector_args (f);
362 if (f->n_vectors > 0)
364 /* current frame doesn't fit - grab empty one */
365 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
366 tf = vlib_frame_scalar_args (f);
369 /* empty frame - store scalar data */
370 store_tx_frame_scalar_data (r, tf);
371 to = vlib_frame_vector_args (f);
372 n_free = VLIB_FRAME_SIZE;
377 vlib_buffer_copy_indices (to, from, n_copy);
378 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
383 /* we have more indices to store, take empty frame */
385 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
386 store_tx_frame_scalar_data (r, vlib_frame_scalar_args (f));
387 vlib_buffer_copy_indices (vlib_frame_vector_args (f), from, n_vectors);
388 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_vectors);
391 VLIB_NODE_FN (vnet_interface_output_node)
392 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
394 vnet_main_t *vnm = vnet_get_main ();
395 vnet_interface_main_t *im = &vnm->interface_main;
396 vlib_combined_counter_main_t *ccm;
397 vnet_hw_interface_t *hi;
398 vnet_sw_interface_t *si;
399 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
400 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
401 u32 n_bytes, n_buffers = frame->n_vectors;
402 u32 config_index = ~0;
403 u32 sw_if_index = rt->sw_if_index;
404 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
405 u32 ti = vm->thread_index;
406 u8 arc = im->output_feature_arc_index;
407 int arc_or_subif = 0;
408 int do_tx_offloads = 0;
411 if (node->flags & VLIB_NODE_FLAG_TRACE)
412 vnet_interface_output_trace (vm, node, frame, n_buffers);
414 from = vlib_frame_vector_args (frame);
417 return vlib_error_drop_buffers (
419 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
420 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
422 vnet_interface_pcap_tx_trace (vm, node, frame,
423 0 /* sw_if_index_from_buffer */ );
425 vlib_get_buffers (vm, from, bufs, n_buffers);
427 si = vnet_get_sw_interface (vnm, sw_if_index);
428 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
430 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
431 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
433 vlib_simple_counter_main_t *cm;
435 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
436 VNET_INTERFACE_COUNTER_TX_ERROR);
437 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
439 return vlib_error_drop_buffers (
441 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
442 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
445 /* interface-output feature arc handling */
446 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
448 vnet_feature_config_main_t *fcm;
449 fcm = vnet_feature_get_config_main (arc);
450 config_index = vnet_get_feature_config_index (arc, sw_if_index);
451 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
454 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
457 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
459 if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) == 0)
462 if (do_tx_offloads == 0 && arc_or_subif == 0)
463 n_bytes = vnet_interface_output_node_inline (
464 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0, 0);
465 else if (do_tx_offloads == 0 && arc_or_subif == 1)
466 n_bytes = vnet_interface_output_node_inline (
467 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0, 1);
468 else if (do_tx_offloads == 1 && arc_or_subif == 0)
469 n_bytes = vnet_interface_output_node_inline (
470 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1, 0);
472 n_bytes = vnet_interface_output_node_inline (
473 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1, 1);
475 from = vlib_frame_vector_args (frame);
476 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
478 enqueu_to_tx_node (vm, node, hi, from, frame->n_vectors);
482 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
486 /* Update main interface stats. */
487 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
491 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
492 .name = "interface-output-template",
493 .vector_size = sizeof (u32),
496 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
497 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
498 vlib_node_runtime_t *
500 vlib_frame_t * frame)
502 vnet_main_t *vnm = vnet_get_main ();
503 u32 n_left_to_next, *from, *to_next;
504 u32 n_left_from, next_index;
506 vnet_interface_pcap_tx_trace (vm, node, frame,
507 1 /* sw_if_index_from_buffer */ );
509 n_left_from = frame->n_vectors;
511 from = vlib_frame_vector_args (frame);
512 next_index = node->cached_next_index;
514 while (n_left_from > 0)
516 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
518 while (n_left_from >= 4 && n_left_to_next >= 2)
520 u32 bi0, bi1, next0, next1;
521 vlib_buffer_t *b0, *b1;
522 vnet_hw_interface_t *hi0, *hi1;
524 /* Prefetch next iteration. */
525 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
526 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
537 b0 = vlib_get_buffer (vm, bi0);
538 b1 = vlib_get_buffer (vm, bi1);
541 vnet_get_sup_hw_interface (vnm,
542 vnet_buffer (b0)->sw_if_index
545 vnet_get_sup_hw_interface (vnm,
546 vnet_buffer (b1)->sw_if_index
549 next0 = hi0->output_node_next_index;
550 next1 = hi1->output_node_next_index;
552 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
553 n_left_to_next, bi0, bi1, next0,
557 while (n_left_from > 0 && n_left_to_next > 0)
561 vnet_hw_interface_t *hi0;
570 b0 = vlib_get_buffer (vm, bi0);
573 vnet_get_sup_hw_interface (vnm,
574 vnet_buffer (b0)->sw_if_index
577 next0 = hi0->output_node_next_index;
579 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
580 n_left_to_next, bi0, next0);
583 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
586 return frame->n_vectors;
589 typedef struct vnet_error_trace_t_
596 ip46_address_t src, dst;
597 } vnet_error_trace_t;
600 format_vnet_error_trace (u8 * s, va_list * va)
602 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
603 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
604 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
606 /* Normal, non-catchup trace */
607 if (t->details_valid == 0)
609 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
610 vnet_get_main (), t->sw_if_index);
612 else if (t->details_valid == 1)
614 /* The trace capture code didn't understant the mactype */
615 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
617 else if (t->details_valid == 2)
619 /* Dump the src/dst addresses */
621 s = format (s, "IP4: %U -> %U",
622 format_ip4_address, &t->src.ip4,
623 format_ip4_address, &t->dst.ip4);
625 s = format (s, "IP6: %U -> %U",
626 format_ip6_address, &t->src.ip6,
627 format_ip6_address, &t->dst.ip6);
633 interface_trace_buffers (vlib_main_t * vm,
634 vlib_node_runtime_t * node, vlib_frame_t * frame)
636 u32 n_left, *buffers;
638 buffers = vlib_frame_vector_args (frame);
639 n_left = frame->n_vectors;
644 vlib_buffer_t *b0, *b1;
645 vnet_error_trace_t *t0, *t1;
647 /* Prefetch next iteration. */
648 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
649 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
654 b0 = vlib_get_buffer (vm, bi0);
655 b1 = vlib_get_buffer (vm, bi1);
657 if (b0->flags & VLIB_BUFFER_IS_TRACED)
659 t0 = vlib_add_trace (vm, node, b0,
660 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
661 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
662 t0->details_valid = 0;
664 if (b1->flags & VLIB_BUFFER_IS_TRACED)
666 t1 = vlib_add_trace (vm, node, b1,
667 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
668 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
669 t1->details_valid = 0;
679 vnet_error_trace_t *t0;
683 b0 = vlib_get_buffer (vm, bi0);
685 if (b0->flags & VLIB_BUFFER_IS_TRACED)
687 t0 = vlib_add_trace (vm, node, b0,
688 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
689 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
690 t0->details_valid = 0;
699 VNET_ERROR_DISPOSITION_DROP,
700 VNET_ERROR_DISPOSITION_PUNT,
701 VNET_ERROR_N_DISPOSITION,
702 } vnet_error_disposition_t;
705 drop_catchup_trace (vlib_main_t * vm,
706 vlib_node_runtime_t * node, vlib_buffer_t * b)
708 /* Can we safely rewind the buffer? If not, fagedaboudit */
709 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
711 vnet_error_trace_t *t;
714 ethernet_header_t *eh;
717 t = vlib_add_trace (vm, node, b, sizeof (*t));
718 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
719 vlib_buffer_advance (b, delta);
721 eh = vlib_buffer_get_current (b);
723 t->mactype = clib_net_to_host_u16 (eh->type);
724 t->details_valid = 1;
727 case ETHERNET_TYPE_IP4:
728 ip4 = (void *) (eh + 1);
729 t->details_valid = 2;
731 t->src.ip4.as_u32 = ip4->src_address.as_u32;
732 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
735 case ETHERNET_TYPE_IP6:
736 ip6 = (void *) (eh + 1);
737 t->details_valid = 2;
739 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
740 sizeof (ip6_address_t));
741 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
742 sizeof (ip6_address_t));
746 /* Dunno, do nothing, leave details_valid alone */
749 /* Restore current data (probably unnecessary) */
750 vlib_buffer_advance (b, -delta);
754 static_always_inline uword
755 interface_drop_punt (vlib_main_t * vm,
756 vlib_node_runtime_t * node,
757 vlib_frame_t * frame,
758 vnet_error_disposition_t disposition)
760 u32 *from, n_left, thread_index, *sw_if_index;
761 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
762 u32 sw_if_indices[VLIB_FRAME_SIZE];
763 vlib_simple_counter_main_t *cm;
764 u16 nexts[VLIB_FRAME_SIZE];
768 vnm = vnet_get_main ();
769 thread_index = vm->thread_index;
770 from = vlib_frame_vector_args (frame);
771 n_left = frame->n_vectors;
773 sw_if_index = sw_if_indices;
775 vlib_get_buffers (vm, from, bufs, n_left);
777 /* "trace add error-drop NNN?" */
778 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
780 /* If pkts aren't otherwise traced... */
781 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
783 /* Trace them from here */
784 node->flags |= VLIB_NODE_FLAG_TRACE;
785 while (n_trace && n_left)
788 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
789 0 /* follow chain */ )))
792 * Here we have a wireshark dissector problem.
793 * Packets may be well-formed, or not. We
794 * must not blow chunks in any case.
796 * Try to produce trace records which will help
797 * folks understand what's going on.
799 drop_catchup_trace (vm, node, b[0]);
807 vlib_set_trace_count (vm, node, n_trace);
809 n_left = frame->n_vectors;
812 if (node->flags & VLIB_NODE_FLAG_TRACE)
813 interface_trace_buffers (vm, node, frame);
815 /* All going to drop regardless, this is just a counting exercise */
816 clib_memset (nexts, 0, sizeof (nexts));
818 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
819 (disposition == VNET_ERROR_DISPOSITION_PUNT
820 ? VNET_INTERFACE_COUNTER_PUNT
821 : VNET_INTERFACE_COUNTER_DROP));
823 /* collect the array of interfaces first ... */
828 /* Prefetch 8 ahead - there's not much going on in each iteration */
829 vlib_prefetch_buffer_header (b[4], LOAD);
830 vlib_prefetch_buffer_header (b[5], LOAD);
831 vlib_prefetch_buffer_header (b[6], LOAD);
832 vlib_prefetch_buffer_header (b[7], LOAD);
834 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
835 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
836 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
837 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
845 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
852 /* ... then count against them in blocks */
853 n_left = frame->n_vectors;
857 vnet_sw_interface_t *sw_if0;
860 off = frame->n_vectors - n_left;
862 sw_if_index = sw_if_indices + off;
864 count = clib_count_equal_u32 (sw_if_index, n_left);
867 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
869 /* Increment super-interface drop/punt counters for
871 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
872 if (sw_if0->sup_sw_if_index != sw_if_index[0])
873 vlib_increment_simple_counter
874 (cm, thread_index, sw_if0->sup_sw_if_index, count);
877 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
879 return frame->n_vectors;
883 pcap_drop_trace (vlib_main_t * vm,
884 vnet_interface_main_t * im,
885 vnet_pcap_t * pp, vlib_frame_t * f)
888 u32 n_left = f->n_vectors;
889 vlib_buffer_t *b0, *p1;
891 i16 save_current_data;
892 u16 save_current_length;
893 vlib_error_main_t *em = &vm->error_main;
895 from = vlib_frame_vector_args (f);
899 if (PREDICT_TRUE (n_left > 1))
901 p1 = vlib_get_buffer (vm, from[1]);
902 vlib_prefetch_buffer_header (p1, LOAD);
906 b0 = vlib_get_buffer (vm, bi0);
910 /* See if we're pointedly ignoring this specific error */
911 if (im->pcap_drop_filter_hash
912 && hash_get (im->pcap_drop_filter_hash, b0->error))
915 if (!vnet_is_packet_pcaped (pp, b0, ~0))
916 continue; /* not matching, skip */
918 /* Trace all drops, or drops received on a specific interface */
919 save_current_data = b0->current_data;
920 save_current_length = b0->current_length;
923 * Typically, we'll need to rewind the buffer
924 * if l2_hdr_offset is valid, make sure to rewind to the start of
925 * the L2 header. This may not be the buffer start in case we pop-ed
927 * Otherwise, rewind to buffer start and hope for the best.
929 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
931 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
932 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
935 else if (b0->current_data > 0)
937 vlib_buffer_advance (b0, (word) -b0->current_data);
941 vlib_buffer_t *last = b0;
942 u32 error_node_index;
945 /* Length of the error string */
946 int error_string_len =
947 clib_strnlen (em->counters_heap[b0->error].name, 128);
949 /* Dig up the drop node */
950 error_node_index = vm->node_main.node_by_error[b0->error];
951 n = vlib_get_node (vm, error_node_index);
953 /* Length of full drop string, w/ "nodename: " prepended */
954 drop_string_len = error_string_len + vec_len (n->name) + 2;
956 /* Find the last buffer in the chain */
957 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
958 last = vlib_get_buffer (vm, last->next_buffer);
961 * Append <nodename>: <error-string> to the capture,
962 * only if we can do that without allocating a new buffer.
964 if (PREDICT_TRUE ((last->current_data + last->current_length) <
965 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
967 clib_memcpy_fast (last->data + last->current_data +
968 last->current_length,
969 n->name, vec_len (n->name));
970 clib_memcpy_fast (last->data + last->current_data +
971 last->current_length + vec_len (n->name),
973 clib_memcpy_fast (last->data + last->current_data +
974 last->current_length + vec_len (n->name) + 2,
975 em->counters_heap[b0->error].name,
977 last->current_length += drop_string_len;
978 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
979 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
980 last->current_length -= drop_string_len;
981 b0->current_data = save_current_data;
982 b0->current_length = save_current_length;
988 * Didn't have space in the last buffer, here's the dropped
991 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
993 b0->current_data = save_current_data;
994 b0->current_length = save_current_length;
998 #ifndef CLIB_MARCH_VARIANT
1000 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1002 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1004 if (im->pcap_drop_filter_hash == 0)
1005 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1008 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1010 hash_unset (im->pcap_drop_filter_hash, error_index);
1012 #endif /* CLIB_MARCH_VARIANT */
1014 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1015 vlib_node_runtime_t * node,
1016 vlib_frame_t * frame)
1018 vnet_main_t *vnm = vnet_get_main ();
1019 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1020 vnet_pcap_t *pp = &vnm->pcap;
1022 if (PREDICT_FALSE (pp->pcap_drop_enable))
1023 pcap_drop_trace (vm, im, pp, frame);
1025 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1028 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1029 vlib_node_runtime_t * node,
1030 vlib_frame_t * frame)
1032 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1036 VLIB_REGISTER_NODE (interface_drop) = {
1037 .name = "error-drop",
1038 .vector_size = sizeof (u32),
1039 .format_trace = format_vnet_error_trace,
1040 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1049 VLIB_REGISTER_NODE (interface_punt) = {
1050 .name = "error-punt",
1051 .vector_size = sizeof (u32),
1052 .format_trace = format_vnet_error_trace,
1053 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1061 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1062 .name = "interface-output",
1063 .vector_size = sizeof (u32),
1066 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1067 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1069 vnet_main_t *vnm = vnet_get_main ();
1070 vnet_interface_main_t *im = &vnm->interface_main;
1071 vnet_hw_if_output_node_runtime_t *r = 0;
1072 vnet_hw_interface_t *hi;
1073 vnet_hw_if_tx_frame_t *tf;
1074 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1075 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1076 u64 used_elts[VLIB_FRAME_SIZE / 64] = {};
1077 u64 mask[VLIB_FRAME_SIZE / 64] = {};
1078 u32 *tmp, *from, n_left, n_free, n_comp, *to, swif, off;
1082 from = vlib_frame_vector_args (frame);
1083 n_left = frame->n_vectors;
1084 vlib_get_buffers (vm, from, bufs, n_left);
1088 vlib_prefetch_buffer_header (b[4], LOAD);
1089 vlib_prefetch_buffer_header (b[5], LOAD);
1090 vlib_prefetch_buffer_header (b[6], LOAD);
1091 vlib_prefetch_buffer_header (b[7], LOAD);
1092 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1093 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1094 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1095 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1104 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1110 n_left = frame->n_vectors;
1111 swif = sw_if_indices[0];
1114 /* a bit ugly but it allows us to reuse stack space for temporary store
1115 * which may also improve memory latency */
1119 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1120 hi = vnet_get_sup_hw_interface (vnm, swif);
1121 if (hi->output_node_thread_runtimes)
1122 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1123 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
1124 tf = vlib_frame_scalar_args (f);
1126 if (f->n_vectors > 0 && (r == 0 || r->frame.queue_id == tf->queue_id))
1129 n_free = VLIB_FRAME_SIZE - f->n_vectors;
1130 if (n_free >= f->n_vectors)
1131 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1137 if (f->n_vectors > 0)
1139 /* current frame doesn't fit - grab empty one */
1140 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1141 tf = vlib_frame_scalar_args (f);
1144 /* empty frame - store scalar data */
1145 store_tx_frame_scalar_data (r, tf);
1146 n_free = VLIB_FRAME_SIZE;
1147 to = vlib_frame_vector_args (f);
1150 /* compare and compress based on comparison mask */
1151 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1152 n_comp = clib_compress_u32 (to, from, mask, frame->n_vectors);
1156 /* indices already written to frame, just close it */
1157 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1159 else if (n_free >= n_comp)
1161 /* enough space in the existing frame */
1162 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1163 vlib_buffer_copy_indices (to, tmp, n_comp);
1164 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1169 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1170 vlib_buffer_copy_indices (to, tmp, n_free);
1171 vlib_put_next_frame (vm, node, next_index, 0);
1174 u32 n_frame2 = n_comp - n_free;
1175 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1176 to = vlib_frame_vector_args (f);
1177 vlib_buffer_copy_indices (to, tmp + n_free, n_frame2);
1178 tf = vlib_frame_scalar_args (f);
1179 store_tx_frame_scalar_data (r, tf);
1180 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_frame2);
1186 /* store comparison mask so we can find next unused element */
1187 for (int i = 0; i < ARRAY_LEN (used_elts); i++)
1188 used_elts[i] |= mask[i];
1190 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1191 while (PREDICT_FALSE (used_elts[off] == ~0))
1195 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1199 return frame->n_vectors;
1202 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1203 .name = "interface-output-arc-end",
1204 .vector_size = sizeof (u32),
1211 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1212 .arc_name = "interface-output",
1213 .start_nodes = VNET_FEATURES (0),
1214 .last_in_arc = "interface-output-arc-end",
1215 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1218 VNET_FEATURE_INIT (span_tx, static) = {
1219 .arc_name = "interface-output",
1220 .node_name = "span-output",
1221 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1224 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1225 .arc_name = "interface-output",
1226 .node_name = "ipsec-if-output",
1227 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1230 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1231 .arc_name = "interface-output",
1232 .node_name = "interface-output-arc-end",
1236 #ifndef CLIB_MARCH_VARIANT
1238 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1242 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1245 if (hi->output_node_index == 0)
1248 next_index = vlib_node_add_next
1249 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1250 hi->output_node_index);
1251 hi->output_node_next_index = next_index;
1256 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1257 (vnet_per_buffer_interface_output_hw_interface_add_del);
1260 vnet_set_interface_output_node (vnet_main_t * vnm,
1261 u32 hw_if_index, u32 node_index)
1263 ASSERT (node_index);
1264 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1265 u32 next_index = vlib_node_add_next
1266 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1267 hi->output_node_next_index = next_index;
1268 hi->output_node_index = node_index;
1270 #endif /* CLIB_MARCH_VARIANT */
1273 * fd.io coding-style-patch-verification: ON
1276 * eval: (c-set-style "gnu")