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/hash/hash.h>
50 #include <vnet/interface_output.h>
51 #include <vppinfra/vector/mask_compare.h>
52 #include <vppinfra/vector/compress.h>
53 #include <vppinfra/vector/count_equal.h>
54 #include <vppinfra/vector/array_mask.h>
60 u8 data[128 - 2 * sizeof (u32)];
62 interface_output_trace_t;
64 #ifndef CLIB_MARCH_VARIANT
66 format_vnet_interface_output_trace (u8 * s, va_list * va)
68 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
69 vlib_node_t *node = va_arg (*va, vlib_node_t *);
70 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
71 vnet_main_t *vnm = vnet_get_main ();
72 vnet_sw_interface_t *si;
75 if (t->sw_if_index != (u32) ~ 0)
77 indent = format_get_indent (s);
79 if (pool_is_free_index
80 (vnm->interface_main.sw_interfaces, t->sw_if_index))
82 /* the interface may have been deleted by the time the trace is printed */
83 s = format (s, "sw_if_index: %d ", t->sw_if_index);
87 si = vnet_get_sw_interface (vnm, t->sw_if_index);
89 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
93 format (s, "\n%U%U", format_white_space, indent,
94 node->format_buffer ? node->format_buffer : format_hex_bytes,
95 t->data, sizeof (t->data));
99 #endif /* CLIB_MARCH_VARIANT */
102 vnet_interface_output_trace (vlib_main_t * vm,
103 vlib_node_runtime_t * node,
104 vlib_frame_t * frame, uword n_buffers)
109 from = vlib_frame_vector_args (frame);
114 vlib_buffer_t *b0, *b1;
115 interface_output_trace_t *t0, *t1;
117 /* Prefetch next iteration. */
118 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
119 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
124 b0 = vlib_get_buffer (vm, bi0);
125 b1 = vlib_get_buffer (vm, bi1);
127 if (b0->flags & VLIB_BUFFER_IS_TRACED)
129 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
130 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
131 t0->flags = b0->flags;
132 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
135 if (b1->flags & VLIB_BUFFER_IS_TRACED)
137 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
138 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
139 t1->flags = b1->flags;
140 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
151 interface_output_trace_t *t0;
155 b0 = vlib_get_buffer (vm, bi0);
157 if (b0->flags & VLIB_BUFFER_IS_TRACED)
159 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
160 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
161 t0->flags = b0->flags;
162 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
170 static_always_inline void
171 vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b)
173 if (b->flags & VNET_BUFFER_F_GSO)
175 vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4,
176 b->flags & VNET_BUFFER_F_IS_IP6);
177 vnet_calc_outer_checksums_inline (vm, b);
180 static_always_inline uword
181 vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index,
182 vlib_combined_counter_main_t *ccm,
183 vlib_buffer_t **b, void **p,
184 u32 config_index, u8 arc, u32 n_left,
185 int processing_level)
188 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
189 u32 ti = vm->thread_index;
195 /* Prefetch next iteration. */
196 vlib_prefetch_buffer_header (b[4], LOAD);
197 vlib_prefetch_buffer_header (b[5], LOAD);
198 vlib_prefetch_buffer_header (b[6], LOAD);
199 vlib_prefetch_buffer_header (b[7], LOAD);
201 if (processing_level >= 1)
202 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
204 /* Be grumpy about zero length buffers for benefit of
205 driver tx function. */
206 ASSERT (b[0]->current_length > 0);
207 ASSERT (b[1]->current_length > 0);
208 ASSERT (b[2]->current_length > 0);
209 ASSERT (b[3]->current_length > 0);
211 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
212 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
213 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
214 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
216 if (processing_level >= 3)
218 p[0] = vlib_buffer_get_current (b[0]);
219 p[1] = vlib_buffer_get_current (b[1]);
220 p[2] = vlib_buffer_get_current (b[2]);
221 p[3] = vlib_buffer_get_current (b[3]);
225 if (processing_level >= 2)
227 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
228 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
229 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
230 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
231 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
233 /* update vlan subif tx counts, if required */
234 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
235 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
237 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
238 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
240 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
241 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
243 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
244 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
246 if (PREDICT_FALSE (config_index != ~0))
248 vnet_buffer (b[0])->feature_arc_index = arc;
249 b[0]->current_config_index = config_index;
250 vnet_buffer (b[1])->feature_arc_index = arc;
251 b[1]->current_config_index = config_index;
252 vnet_buffer (b[2])->feature_arc_index = arc;
253 b[2]->current_config_index = config_index;
254 vnet_buffer (b[3])->feature_arc_index = arc;
255 b[3]->current_config_index = config_index;
259 if (processing_level >= 1 && (or_flags & VNET_BUFFER_F_OFFLOAD))
261 vnet_interface_output_handle_offload (vm, b[0]);
262 vnet_interface_output_handle_offload (vm, b[1]);
263 vnet_interface_output_handle_offload (vm, b[2]);
264 vnet_interface_output_handle_offload (vm, b[3]);
273 /* Be grumpy about zero length buffers for benefit of
274 driver tx function. */
275 ASSERT (b[0]->current_length > 0);
277 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
279 if (processing_level >= 3)
281 p[0] = vlib_buffer_get_current (b[0]);
285 if (processing_level >= 2)
287 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
289 if (PREDICT_FALSE (config_index != ~0))
291 vnet_buffer (b[0])->feature_arc_index = arc;
292 b[0]->current_config_index = config_index;
295 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
296 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
299 if (processing_level >= 1)
300 vnet_interface_output_handle_offload (vm, b[0]);
309 static_always_inline void
310 vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
311 vlib_frame_t *frame, int in_interface_ouput)
313 vnet_main_t *vnm = vnet_get_main ();
314 u32 n_left_from, *from;
315 u32 sw_if_index = ~0, hw_if_index = ~0;
316 vnet_pcap_t *pp = &vnm->pcap;
318 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
321 if (in_interface_ouput)
323 /* interface-output is called right before interface-output-template.
324 * We only want to capture packets here if there is a per-interface
325 * filter, in case it matches the sub-interface sw_if_index.
326 * If there is no per-interface filter configured, let the
327 * interface-output-template node deal with it */
328 if (pp->pcap_sw_if_index == 0)
333 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
334 sw_if_index = rt->sw_if_index;
337 n_left_from = frame->n_vectors;
338 from = vlib_frame_vector_args (frame);
340 while (n_left_from > 0)
343 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
347 if (in_interface_ouput)
349 const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX];
350 if (PREDICT_FALSE (sii != sw_if_index))
352 const vnet_hw_interface_t *hi =
353 vnet_get_sup_hw_interface (vnm, sii);
354 hw_if_index = hi->sw_if_index;
357 if (hw_if_index == sw_if_index)
358 continue; /* defer to interface-output-template */
361 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
362 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
366 static_always_inline void
367 hash_func_with_mask (void **p, u32 *hash, u32 n_packets, u32 *lookup_table,
368 u32 mask, vnet_hash_fn_t hf)
370 u32 n_left_from = n_packets;
372 hf (p, hash, n_packets);
374 clib_array_mask_u32 (hash, mask, n_packets);
376 while (n_left_from >= 4)
378 hash[0] = lookup_table[hash[0]];
379 hash[1] = lookup_table[hash[1]];
380 hash[2] = lookup_table[hash[2]];
381 hash[3] = lookup_table[hash[3]];
387 while (n_left_from > 0)
389 hash[0] = lookup_table[hash[0]];
396 static_always_inline void
397 store_tx_frame_scalar_data (vnet_hw_if_tx_frame_t *copy_frame,
398 vnet_hw_if_tx_frame_t *tf)
401 clib_memcpy_fast (tf, copy_frame, sizeof (vnet_hw_if_tx_frame_t));
404 static_always_inline u32
405 enqueue_one_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node, u32 *ppqi,
406 u32 *from, vnet_hw_if_tx_frame_t *copy_frame,
407 u32 n_vectors, u32 n_left, u32 next_index)
409 u32 tmp[VLIB_FRAME_SIZE];
410 vlib_frame_bitmap_t mask = {};
412 vnet_hw_if_tx_frame_t *tf;
414 u32 n_copy = 0, n_free = 0;
416 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
417 tf = vlib_frame_scalar_args (f);
419 if (f->n_vectors > 0 &&
420 (!copy_frame || (tf->queue_id == copy_frame->queue_id)))
422 /* append current next frame */
423 n_free = VLIB_FRAME_SIZE - f->n_vectors;
425 * if frame contains enough space for worst case scenario,
426 * we can avoid use of tmp
428 if (n_free >= n_left)
429 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
435 if (f->n_vectors > 0)
437 /* current frame doesn't fit - grab empty one */
438 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
439 tf = vlib_frame_scalar_args (f);
442 /* empty frame - store scalar data */
443 store_tx_frame_scalar_data (copy_frame, tf);
444 to = vlib_frame_vector_args (f);
445 n_free = VLIB_FRAME_SIZE;
449 * per packet queue id array
450 * compare with given queue_id, if match, copy respective buffer index from
455 clib_mask_compare_u32 (copy_frame->queue_id, ppqi, mask, n_vectors);
456 n_copy = clib_compress_u32 (to, from, mask, n_vectors);
464 * no work required, just copy all buffer indices from -> to
467 vlib_buffer_copy_indices (to, from, n_copy);
472 /* indices already written to frame, just close it */
473 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
475 else if (n_free >= n_copy)
477 /* enough space in the existing frame */
478 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
479 vlib_buffer_copy_indices (to, tmp, n_copy);
480 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
485 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
486 vlib_buffer_copy_indices (to, tmp, n_free);
487 vlib_put_next_frame (vm, node, next_index, 0);
490 u32 n_2nd_frame = n_copy - n_free;
491 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
492 tf = vlib_frame_scalar_args (f);
493 /* empty frame - store scalar data */
494 store_tx_frame_scalar_data (copy_frame, tf);
495 to = vlib_frame_vector_args (f);
496 vlib_buffer_copy_indices (to, tmp + n_free, n_2nd_frame);
497 vlib_put_next_frame (vm, node, next_index,
498 VLIB_FRAME_SIZE - n_2nd_frame);
501 return n_left - n_copy;
504 static_always_inline void
505 enqueue_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
506 vnet_hw_interface_t *hi, u32 next_index,
507 vnet_hw_if_output_node_runtime_t *r, u32 *from, void **p,
510 u32 n_left = n_vectors;
512 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
515 * backward compatible for drivers not integrated with new tx infra.
519 n_left = enqueue_one_to_tx_node (vm, node, NULL, from, NULL, n_vectors,
523 * only 1 tx queue of given interface is available on given thread
525 else if (r->n_queues == 1)
527 n_left = enqueue_one_to_tx_node (vm, node, NULL, from, r->frame,
528 n_vectors, n_left, next_index);
531 * multi tx-queues use case
533 else if (r->n_queues > 1)
535 u32 qids[VLIB_FRAME_SIZE];
537 hash_func_with_mask (p, qids, n_vectors, r->lookup_table,
538 vec_len (r->lookup_table) - 1, hi->hf);
540 for (u32 i = 0; i < r->n_queues; i++)
542 n_left = enqueue_one_to_tx_node (vm, node, qids, from, &r->frame[i],
543 n_vectors, n_left, next_index);
552 VLIB_NODE_FN (vnet_interface_output_node)
553 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
555 vnet_main_t *vnm = vnet_get_main ();
556 vnet_interface_main_t *im = &vnm->interface_main;
557 vlib_combined_counter_main_t *ccm;
558 vnet_hw_interface_t *hi;
559 vnet_sw_interface_t *si;
560 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
561 vnet_hw_if_output_node_runtime_t *r = 0;
562 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
563 u32 n_bytes, n_buffers = frame->n_vectors;
564 u32 config_index = ~0;
565 u32 sw_if_index = rt->sw_if_index;
566 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
567 u32 ti = vm->thread_index;
568 u8 arc = im->output_feature_arc_index;
569 int arc_or_subif = 0;
570 int do_tx_offloads = 0;
571 void *ptr[VLIB_FRAME_SIZE], **p = ptr;
575 if (node->flags & VLIB_NODE_FLAG_TRACE)
576 vnet_interface_output_trace (vm, node, frame, n_buffers);
578 from = vlib_frame_vector_args (frame);
581 return vlib_error_drop_buffers (
583 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
584 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
586 vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */);
588 vlib_get_buffers (vm, from, bufs, n_buffers);
590 si = vnet_get_sw_interface (vnm, sw_if_index);
591 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
593 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
594 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
596 vlib_simple_counter_main_t *cm;
598 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
599 VNET_INTERFACE_COUNTER_TX_ERROR);
600 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
602 return vlib_error_drop_buffers (
604 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
605 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
608 if (hi->output_node_thread_runtimes)
609 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
614 * tx queue of given interface is not available on given thread
616 if (r->n_queues == 0)
617 return vlib_error_drop_buffers (
619 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
620 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE);
622 * multiple tx queues available on given thread
624 else if (r->n_queues > 1)
625 /* construct array of pointer */
629 /* interface-output feature arc handling */
630 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
632 vnet_feature_config_main_t *fcm;
633 fcm = vnet_feature_get_config_main (arc);
634 config_index = vnet_get_feature_config_index (arc, sw_if_index);
635 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
638 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
641 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
643 /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
644 * here before sending to the interface */
645 if ((hi->caps & VNET_HW_IF_CAP_TX_CKSUM) != VNET_HW_IF_CAP_TX_CKSUM)
649 if (do_tx_offloads == 0 && arc_or_subif == 0 && is_parr == 0)
650 n_bytes = vnet_interface_output_node_inline (
651 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 0);
652 // basic processing + tx offloads
653 else if (do_tx_offloads == 1 && arc_or_subif == 0 && is_parr == 0)
654 n_bytes = vnet_interface_output_node_inline (
655 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 1);
656 // basic processing + tx offloads + vlans + arcs
657 else if (do_tx_offloads == 1 && arc_or_subif == 1 && is_parr == 0)
658 n_bytes = vnet_interface_output_node_inline (
659 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 2);
660 // basic processing + tx offloads + vlans + arcs + multi-txqs
662 n_bytes = vnet_interface_output_node_inline (
663 vm, sw_if_index, ccm, bufs, p, config_index, arc, n_buffers, 3);
665 from = vlib_frame_vector_args (frame);
666 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
668 enqueue_to_tx_node (vm, node, hi, next_index, r, from, ptr,
673 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
677 /* Update main interface stats. */
678 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
682 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
683 .name = "interface-output-template",
684 .vector_size = sizeof (u32),
687 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
688 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
689 vlib_node_runtime_t *
691 vlib_frame_t * frame)
693 vnet_main_t *vnm = vnet_get_main ();
694 u32 n_left_to_next, *from, *to_next;
695 u32 n_left_from, next_index;
697 vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* in_interface_ouput */);
699 n_left_from = frame->n_vectors;
701 from = vlib_frame_vector_args (frame);
702 next_index = node->cached_next_index;
704 while (n_left_from > 0)
706 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
708 while (n_left_from >= 4 && n_left_to_next >= 2)
710 u32 bi0, bi1, next0, next1;
711 vlib_buffer_t *b0, *b1;
712 vnet_hw_interface_t *hi0, *hi1;
714 /* Prefetch next iteration. */
715 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
716 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
727 b0 = vlib_get_buffer (vm, bi0);
728 b1 = vlib_get_buffer (vm, bi1);
731 vnet_get_sup_hw_interface (vnm,
732 vnet_buffer (b0)->sw_if_index
735 vnet_get_sup_hw_interface (vnm,
736 vnet_buffer (b1)->sw_if_index
739 next0 = hi0->output_node_next_index;
740 next1 = hi1->output_node_next_index;
742 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
743 n_left_to_next, bi0, bi1, next0,
747 while (n_left_from > 0 && n_left_to_next > 0)
751 vnet_hw_interface_t *hi0;
760 b0 = vlib_get_buffer (vm, bi0);
763 vnet_get_sup_hw_interface (vnm,
764 vnet_buffer (b0)->sw_if_index
767 next0 = hi0->output_node_next_index;
769 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
770 n_left_to_next, bi0, next0);
773 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
776 return frame->n_vectors;
779 typedef struct vnet_error_trace_t_
786 ip46_address_t src, dst;
787 } vnet_error_trace_t;
790 format_vnet_error_trace (u8 * s, va_list * va)
792 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
793 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
794 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
796 /* Normal, non-catchup trace */
797 if (t->details_valid == 0)
799 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
800 vnet_get_main (), t->sw_if_index);
802 else if (t->details_valid == 1)
804 /* The trace capture code didn't understant the mactype */
805 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
807 else if (t->details_valid == 2)
809 /* Dump the src/dst addresses */
811 s = format (s, "IP4: %U -> %U",
812 format_ip4_address, &t->src.ip4,
813 format_ip4_address, &t->dst.ip4);
815 s = format (s, "IP6: %U -> %U",
816 format_ip6_address, &t->src.ip6,
817 format_ip6_address, &t->dst.ip6);
823 interface_trace_buffers (vlib_main_t * vm,
824 vlib_node_runtime_t * node, vlib_frame_t * frame)
826 u32 n_left, *buffers;
828 buffers = vlib_frame_vector_args (frame);
829 n_left = frame->n_vectors;
834 vlib_buffer_t *b0, *b1;
835 vnet_error_trace_t *t0, *t1;
837 /* Prefetch next iteration. */
838 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
839 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
844 b0 = vlib_get_buffer (vm, bi0);
845 b1 = vlib_get_buffer (vm, bi1);
847 if (b0->flags & VLIB_BUFFER_IS_TRACED)
849 t0 = vlib_add_trace (vm, node, b0,
850 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
851 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
852 t0->details_valid = 0;
854 if (b1->flags & VLIB_BUFFER_IS_TRACED)
856 t1 = vlib_add_trace (vm, node, b1,
857 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
858 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
859 t1->details_valid = 0;
869 vnet_error_trace_t *t0;
873 b0 = vlib_get_buffer (vm, bi0);
875 if (b0->flags & VLIB_BUFFER_IS_TRACED)
877 t0 = vlib_add_trace (vm, node, b0,
878 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
879 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
880 t0->details_valid = 0;
889 VNET_ERROR_DISPOSITION_DROP,
890 VNET_ERROR_DISPOSITION_PUNT,
891 VNET_ERROR_N_DISPOSITION,
892 } vnet_error_disposition_t;
895 drop_catchup_trace (vlib_main_t * vm,
896 vlib_node_runtime_t * node, vlib_buffer_t * b)
898 /* Can we safely rewind the buffer? If not, fagedaboudit */
899 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
901 vnet_error_trace_t *t;
904 ethernet_header_t *eh;
907 t = vlib_add_trace (vm, node, b, sizeof (*t));
908 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
909 vlib_buffer_advance (b, delta);
911 eh = vlib_buffer_get_current (b);
913 t->mactype = clib_net_to_host_u16 (eh->type);
914 t->details_valid = 1;
917 case ETHERNET_TYPE_IP4:
918 ip4 = (void *) (eh + 1);
919 t->details_valid = 2;
921 t->src.ip4.as_u32 = ip4->src_address.as_u32;
922 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
925 case ETHERNET_TYPE_IP6:
926 ip6 = (void *) (eh + 1);
927 t->details_valid = 2;
929 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
930 sizeof (ip6_address_t));
931 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
932 sizeof (ip6_address_t));
936 /* Dunno, do nothing, leave details_valid alone */
939 /* Restore current data (probably unnecessary) */
940 vlib_buffer_advance (b, -delta);
944 static_always_inline uword
945 interface_drop_punt (vlib_main_t * vm,
946 vlib_node_runtime_t * node,
947 vlib_frame_t * frame,
948 vnet_error_disposition_t disposition)
950 u32 *from, n_left, thread_index, *sw_if_index;
951 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
952 u32 sw_if_indices[VLIB_FRAME_SIZE];
953 vlib_simple_counter_main_t *cm;
954 u16 nexts[VLIB_FRAME_SIZE];
958 vnm = vnet_get_main ();
959 thread_index = vm->thread_index;
960 from = vlib_frame_vector_args (frame);
961 n_left = frame->n_vectors;
963 sw_if_index = sw_if_indices;
965 vlib_get_buffers (vm, from, bufs, n_left);
967 /* "trace add error-drop NNN?" */
968 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
970 /* If pkts aren't otherwise traced... */
971 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
973 /* Trace them from here */
974 node->flags |= VLIB_NODE_FLAG_TRACE;
975 while (n_trace && n_left)
978 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
979 0 /* follow chain */ )))
982 * Here we have a wireshark dissector problem.
983 * Packets may be well-formed, or not. We
984 * must not blow chunks in any case.
986 * Try to produce trace records which will help
987 * folks understand what's going on.
989 drop_catchup_trace (vm, node, b[0]);
997 vlib_set_trace_count (vm, node, n_trace);
999 n_left = frame->n_vectors;
1002 if (node->flags & VLIB_NODE_FLAG_TRACE)
1003 interface_trace_buffers (vm, node, frame);
1005 /* All going to drop regardless, this is just a counting exercise */
1006 clib_memset (nexts, 0, sizeof (nexts));
1008 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1009 (disposition == VNET_ERROR_DISPOSITION_PUNT
1010 ? VNET_INTERFACE_COUNTER_PUNT
1011 : VNET_INTERFACE_COUNTER_DROP));
1013 /* collect the array of interfaces first ... */
1018 /* Prefetch 8 ahead - there's not much going on in each iteration */
1019 vlib_prefetch_buffer_header (b[4], LOAD);
1020 vlib_prefetch_buffer_header (b[5], LOAD);
1021 vlib_prefetch_buffer_header (b[6], LOAD);
1022 vlib_prefetch_buffer_header (b[7], LOAD);
1024 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1025 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1026 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1027 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1035 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1042 /* ... then count against them in blocks */
1043 n_left = frame->n_vectors;
1047 vnet_sw_interface_t *sw_if0;
1050 off = frame->n_vectors - n_left;
1052 sw_if_index = sw_if_indices + off;
1054 count = clib_count_equal_u32 (sw_if_index, n_left);
1057 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1059 /* Increment super-interface drop/punt counters for
1061 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1062 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1063 vlib_increment_simple_counter
1064 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1067 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1069 return frame->n_vectors;
1073 pcap_drop_trace (vlib_main_t * vm,
1074 vnet_interface_main_t * im,
1075 vnet_pcap_t * pp, vlib_frame_t * f)
1078 u32 n_left = f->n_vectors;
1079 vlib_buffer_t *b0, *p1;
1081 i16 save_current_data;
1082 u16 save_current_length;
1083 vlib_error_main_t *em = &vm->error_main;
1085 from = vlib_frame_vector_args (f);
1089 if (PREDICT_TRUE (n_left > 1))
1091 p1 = vlib_get_buffer (vm, from[1]);
1092 vlib_prefetch_buffer_header (p1, LOAD);
1096 b0 = vlib_get_buffer (vm, bi0);
1100 /* See if we're pointedly ignoring this specific error */
1101 if (im->pcap_drop_filter_hash
1102 && hash_get (im->pcap_drop_filter_hash, b0->error))
1105 if (!vnet_is_packet_pcaped (pp, b0, ~0))
1106 continue; /* not matching, skip */
1108 /* Trace all drops, or drops received on a specific interface */
1109 save_current_data = b0->current_data;
1110 save_current_length = b0->current_length;
1113 * Typically, we'll need to rewind the buffer
1114 * if l2_hdr_offset is valid, make sure to rewind to the start of
1115 * the L2 header. This may not be the buffer start in case we pop-ed
1117 * Otherwise, rewind to buffer start and hope for the best.
1119 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
1121 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
1122 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
1125 else if (b0->current_data > 0)
1127 vlib_buffer_advance (b0, (word) -b0->current_data);
1131 vlib_buffer_t *last = b0;
1132 u32 error_node_index;
1133 int drop_string_len;
1135 /* Length of the error string */
1136 int error_string_len =
1137 clib_strnlen (em->counters_heap[b0->error].name, 128);
1139 /* Dig up the drop node */
1140 error_node_index = vm->node_main.node_by_error[b0->error];
1141 n = vlib_get_node (vm, error_node_index);
1143 /* Length of full drop string, w/ "nodename: " prepended */
1144 drop_string_len = error_string_len + vec_len (n->name) + 2;
1146 /* Find the last buffer in the chain */
1147 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
1148 last = vlib_get_buffer (vm, last->next_buffer);
1151 * Append <nodename>: <error-string> to the capture,
1152 * only if we can do that without allocating a new buffer.
1154 if (PREDICT_TRUE ((last->current_data + last->current_length) <
1155 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
1157 clib_memcpy_fast (last->data + last->current_data +
1158 last->current_length,
1159 n->name, vec_len (n->name));
1160 clib_memcpy_fast (last->data + last->current_data +
1161 last->current_length + vec_len (n->name),
1163 clib_memcpy_fast (last->data + last->current_data +
1164 last->current_length + vec_len (n->name) + 2,
1165 em->counters_heap[b0->error].name,
1167 last->current_length += drop_string_len;
1168 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1169 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1170 last->current_length -= drop_string_len;
1171 b0->current_data = save_current_data;
1172 b0->current_length = save_current_length;
1178 * Didn't have space in the last buffer, here's the dropped
1181 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1183 b0->current_data = save_current_data;
1184 b0->current_length = save_current_length;
1188 #ifndef CLIB_MARCH_VARIANT
1190 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1192 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1194 if (im->pcap_drop_filter_hash == 0)
1195 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1198 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1200 hash_unset (im->pcap_drop_filter_hash, error_index);
1202 #endif /* CLIB_MARCH_VARIANT */
1204 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1205 vlib_node_runtime_t * node,
1206 vlib_frame_t * frame)
1208 vnet_main_t *vnm = vnet_get_main ();
1209 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1210 vnet_pcap_t *pp = &vnm->pcap;
1212 if (PREDICT_FALSE (pp->pcap_drop_enable))
1213 pcap_drop_trace (vm, im, pp, frame);
1215 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1218 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1219 vlib_node_runtime_t * node,
1220 vlib_frame_t * frame)
1222 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1226 VLIB_REGISTER_NODE (interface_drop) = {
1227 .name = "error-drop",
1228 .vector_size = sizeof (u32),
1229 .format_trace = format_vnet_error_trace,
1230 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1239 VLIB_REGISTER_NODE (interface_punt) = {
1240 .name = "error-punt",
1241 .vector_size = sizeof (u32),
1242 .format_trace = format_vnet_error_trace,
1243 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1251 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1252 .name = "interface-output",
1253 .vector_size = sizeof (u32),
1256 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1257 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1259 vnet_main_t *vnm = vnet_get_main ();
1260 vnet_interface_main_t *im = &vnm->interface_main;
1261 vnet_hw_interface_t *hi;
1262 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1263 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1264 vlib_frame_bitmap_t used_elts = {}, mask = {};
1265 u32 *tmp, *from, n_left, n_comp, n_p_comp, swif, off;
1267 void *ptr[VLIB_FRAME_SIZE], **p = ptr;
1269 from = vlib_frame_vector_args (frame);
1270 n_left = frame->n_vectors;
1271 vlib_get_buffers (vm, from, bufs, n_left);
1275 vlib_prefetch_buffer_header (b[4], LOAD);
1276 vlib_prefetch_buffer_header (b[5], LOAD);
1277 vlib_prefetch_buffer_header (b[6], LOAD);
1278 vlib_prefetch_buffer_header (b[7], LOAD);
1280 p[0] = vlib_buffer_get_current (b[0]);
1281 p[1] = vlib_buffer_get_current (b[1]);
1282 p[2] = vlib_buffer_get_current (b[2]);
1283 p[3] = vlib_buffer_get_current (b[3]);
1284 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1285 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1286 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1287 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1297 p[0] = vlib_buffer_get_current (b[0]);
1298 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1305 n_left = frame->n_vectors;
1306 swif = sw_if_indices[0];
1309 /* a bit ugly but it allows us to reuse stack space for temporary store
1310 * which may also improve memory latency */
1314 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1315 hi = vnet_get_sup_hw_interface (vnm, swif);
1316 vnet_hw_if_output_node_runtime_t *r = 0;
1317 void *ptr_tmp[VLIB_FRAME_SIZE], **p_tmp = ptr_tmp;
1319 if (hi->output_node_thread_runtimes)
1320 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1322 /* compare and compress based on comparison mask */
1323 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1324 n_comp = clib_compress_u32 (tmp, from, mask, frame->n_vectors);
1327 * tx queue of given interface is not available on given thread
1331 if (r->n_queues == 0)
1333 vlib_error_drop_buffers (
1335 /* buffer stride */ 1, n_comp, VNET_INTERFACE_OUTPUT_NEXT_DROP,
1336 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE);
1339 else if (r->n_queues > 1)
1341 n_p_comp = clib_compress_u64 ((u64 *) p_tmp, (u64 *) ptr, mask,
1343 ASSERT (n_p_comp == n_comp);
1347 enqueue_to_tx_node (vm, node, hi, next_index, r, tmp, ptr_tmp, n_comp);
1353 /* store comparison mask so we can find next unused element */
1354 vlib_frame_bitmap_or (used_elts, mask);
1356 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1357 while (PREDICT_FALSE (used_elts[off] == ~0))
1361 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1365 return frame->n_vectors;
1368 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1369 .name = "interface-output-arc-end",
1370 .vector_size = sizeof (u32),
1377 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1378 .arc_name = "interface-output",
1379 .start_nodes = VNET_FEATURES (0),
1380 .last_in_arc = "interface-output-arc-end",
1381 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1384 VNET_FEATURE_INIT (span_tx, static) = {
1385 .arc_name = "interface-output",
1386 .node_name = "span-output",
1387 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1390 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1391 .arc_name = "interface-output",
1392 .node_name = "ipsec-if-output",
1393 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1396 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1397 .arc_name = "interface-output",
1398 .node_name = "interface-output-arc-end",
1402 #ifndef CLIB_MARCH_VARIANT
1404 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1408 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1411 if (hi->output_node_index == 0)
1414 next_index = vlib_node_add_next
1415 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1416 hi->output_node_index);
1417 hi->output_node_next_index = next_index;
1422 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1423 (vnet_per_buffer_interface_output_hw_interface_add_del);
1426 vnet_set_interface_output_node (vnet_main_t * vnm,
1427 u32 hw_if_index, u32 node_index)
1429 ASSERT (node_index);
1430 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1431 u32 next_index = vlib_node_add_next
1432 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1433 hi->output_node_next_index = next_index;
1434 hi->output_node_index = node_index;
1436 #endif /* CLIB_MARCH_VARIANT */
1439 * fd.io coding-style-patch-verification: ON
1442 * eval: (c-set-style "gnu")