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 vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4,
174 b->flags & VNET_BUFFER_F_IS_IP6);
175 vnet_calc_outer_checksums_inline (vm, b);
178 static_always_inline uword
179 vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index,
180 vlib_combined_counter_main_t *ccm,
181 vlib_buffer_t **b, void **p,
182 u32 config_index, u8 arc, u32 n_left,
183 int processing_level)
186 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
187 u32 ti = vm->thread_index;
193 /* Prefetch next iteration. */
194 vlib_prefetch_buffer_header (b[4], LOAD);
195 vlib_prefetch_buffer_header (b[5], LOAD);
196 vlib_prefetch_buffer_header (b[6], LOAD);
197 vlib_prefetch_buffer_header (b[7], LOAD);
199 if (processing_level >= 1)
200 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
202 /* Be grumpy about zero length buffers for benefit of
203 driver tx function. */
204 ASSERT (b[0]->current_length > 0);
205 ASSERT (b[1]->current_length > 0);
206 ASSERT (b[2]->current_length > 0);
207 ASSERT (b[3]->current_length > 0);
209 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
210 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
211 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
212 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
214 if (processing_level >= 3)
216 p[0] = vlib_buffer_get_current (b[0]);
217 p[1] = vlib_buffer_get_current (b[1]);
218 p[2] = vlib_buffer_get_current (b[2]);
219 p[3] = vlib_buffer_get_current (b[3]);
223 if (processing_level >= 2)
225 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
226 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
227 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
228 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
229 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
231 /* update vlan subif tx counts, if required */
232 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
233 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
235 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
236 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
238 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
239 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
241 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
242 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
244 if (PREDICT_FALSE (config_index != ~0))
246 vnet_buffer (b[0])->feature_arc_index = arc;
247 b[0]->current_config_index = config_index;
248 vnet_buffer (b[1])->feature_arc_index = arc;
249 b[1]->current_config_index = config_index;
250 vnet_buffer (b[2])->feature_arc_index = arc;
251 b[2]->current_config_index = config_index;
252 vnet_buffer (b[3])->feature_arc_index = arc;
253 b[3]->current_config_index = config_index;
257 if (processing_level >= 1 && (or_flags & VNET_BUFFER_F_OFFLOAD))
259 vnet_interface_output_handle_offload (vm, b[0]);
260 vnet_interface_output_handle_offload (vm, b[1]);
261 vnet_interface_output_handle_offload (vm, b[2]);
262 vnet_interface_output_handle_offload (vm, b[3]);
271 /* Be grumpy about zero length buffers for benefit of
272 driver tx function. */
273 ASSERT (b[0]->current_length > 0);
275 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
277 if (processing_level >= 3)
279 p[0] = vlib_buffer_get_current (b[0]);
283 if (processing_level >= 2)
285 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
287 if (PREDICT_FALSE (config_index != ~0))
289 vnet_buffer (b[0])->feature_arc_index = arc;
290 b[0]->current_config_index = config_index;
293 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
294 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
297 if (processing_level >= 1)
298 vnet_interface_output_handle_offload (vm, b[0]);
307 static_always_inline void
308 vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
309 vlib_frame_t *frame, int in_interface_ouput)
311 vnet_main_t *vnm = vnet_get_main ();
312 u32 n_left_from, *from;
313 u32 sw_if_index = ~0, hw_if_index = ~0;
314 vnet_pcap_t *pp = &vnm->pcap;
316 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
319 if (in_interface_ouput)
321 /* interface-output is called right before interface-output-template.
322 * We only want to capture packets here if there is a per-interface
323 * filter, in case it matches the sub-interface sw_if_index.
324 * If there is no per-interface filter configured, let the
325 * interface-output-template node deal with it */
326 if (pp->pcap_sw_if_index == 0)
331 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
332 sw_if_index = rt->sw_if_index;
335 n_left_from = frame->n_vectors;
336 from = vlib_frame_vector_args (frame);
338 while (n_left_from > 0)
341 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
345 if (in_interface_ouput)
347 const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX];
348 if (PREDICT_FALSE (sii != sw_if_index))
350 const vnet_hw_interface_t *hi =
351 vnet_get_sup_hw_interface (vnm, sii);
352 hw_if_index = hi->sw_if_index;
355 if (hw_if_index == sw_if_index)
356 continue; /* defer to interface-output-template */
359 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
360 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
364 static_always_inline void
365 hash_func_with_mask (void **p, u32 *hash, u32 n_packets, u32 *lookup_table,
366 u32 mask, vnet_hash_fn_t hf)
368 u32 n_left_from = n_packets;
370 hf (p, hash, n_packets);
372 clib_array_mask_u32 (hash, mask, n_packets);
374 while (n_left_from >= 4)
376 hash[0] = lookup_table[hash[0]];
377 hash[1] = lookup_table[hash[1]];
378 hash[2] = lookup_table[hash[2]];
379 hash[3] = lookup_table[hash[3]];
385 while (n_left_from > 0)
387 hash[0] = lookup_table[hash[0]];
394 static_always_inline void
395 store_tx_frame_scalar_data (vnet_hw_if_tx_frame_t *copy_frame,
396 vnet_hw_if_tx_frame_t *tf)
399 clib_memcpy_fast (tf, copy_frame, sizeof (vnet_hw_if_tx_frame_t));
402 static_always_inline u32
403 enqueue_one_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node, u32 *ppqi,
404 u32 *from, vnet_hw_if_tx_frame_t *copy_frame,
405 u32 n_vectors, u32 n_left, u32 next_index)
407 u32 tmp[VLIB_FRAME_SIZE];
408 vlib_frame_bitmap_t mask = {};
410 vnet_hw_if_tx_frame_t *tf;
412 u32 n_copy = 0, n_free = 0;
414 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
415 tf = vlib_frame_scalar_args (f);
417 if (f->n_vectors > 0 &&
418 (!copy_frame || (tf->queue_id == copy_frame->queue_id)))
420 /* append current next frame */
421 n_free = VLIB_FRAME_SIZE - f->n_vectors;
423 * if frame contains enough space for worst case scenario,
424 * we can avoid use of tmp
426 if (n_free >= n_left)
427 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
433 if (f->n_vectors > 0)
435 /* current frame doesn't fit - grab empty one */
436 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
437 tf = vlib_frame_scalar_args (f);
440 /* empty frame - store scalar data */
441 store_tx_frame_scalar_data (copy_frame, tf);
442 to = vlib_frame_vector_args (f);
443 n_free = VLIB_FRAME_SIZE;
447 * per packet queue id array
448 * compare with given queue_id, if match, copy respective buffer index from
453 clib_mask_compare_u32 (copy_frame->queue_id, ppqi, mask, n_vectors);
454 n_copy = clib_compress_u32 (to, from, mask, n_vectors);
462 * no work required, just copy all buffer indices from -> to
465 vlib_buffer_copy_indices (to, from, n_copy);
470 /* indices already written to frame, just close it */
471 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
473 else if (n_free >= n_copy)
475 /* enough space in the existing frame */
476 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
477 vlib_buffer_copy_indices (to, tmp, n_copy);
478 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
483 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
484 vlib_buffer_copy_indices (to, tmp, n_free);
485 vlib_put_next_frame (vm, node, next_index, 0);
488 u32 n_2nd_frame = n_copy - n_free;
489 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
490 tf = vlib_frame_scalar_args (f);
491 /* empty frame - store scalar data */
492 store_tx_frame_scalar_data (copy_frame, tf);
493 to = vlib_frame_vector_args (f);
494 vlib_buffer_copy_indices (to, tmp + n_free, n_2nd_frame);
495 vlib_put_next_frame (vm, node, next_index,
496 VLIB_FRAME_SIZE - n_2nd_frame);
499 return n_left - n_copy;
502 static_always_inline void
503 enqueue_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
504 vnet_hw_interface_t *hi, u32 next_index,
505 vnet_hw_if_output_node_runtime_t *r, u32 *from, void **p,
508 u32 n_left = n_vectors;
510 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
513 * backward compatible for drivers not integrated with new tx infra.
517 n_left = enqueue_one_to_tx_node (vm, node, NULL, from, NULL, n_vectors,
521 * only 1 tx queue of given interface is available on given thread
523 else if (r->n_queues == 1)
525 n_left = enqueue_one_to_tx_node (vm, node, NULL, from, r->frame,
526 n_vectors, n_left, next_index);
529 * multi tx-queues use case
531 else if (r->n_queues > 1)
533 u32 qids[VLIB_FRAME_SIZE];
535 hash_func_with_mask (p, qids, n_vectors, r->lookup_table,
536 vec_len (r->lookup_table) - 1, hi->hf);
538 for (u32 i = 0; i < r->n_queues; i++)
540 n_left = enqueue_one_to_tx_node (vm, node, qids, from, &r->frame[i],
541 n_vectors, n_left, next_index);
550 VLIB_NODE_FN (vnet_interface_output_node)
551 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
553 vnet_main_t *vnm = vnet_get_main ();
554 vnet_interface_main_t *im = &vnm->interface_main;
555 vlib_combined_counter_main_t *ccm;
556 vnet_hw_interface_t *hi;
557 vnet_sw_interface_t *si;
558 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
559 vnet_hw_if_output_node_runtime_t *r = 0;
560 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
561 u32 n_bytes, n_buffers = frame->n_vectors;
562 u32 config_index = ~0;
563 u32 sw_if_index = rt->sw_if_index;
564 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
565 u32 ti = vm->thread_index;
566 u8 arc = im->output_feature_arc_index;
567 int arc_or_subif = 0;
568 int do_tx_offloads = 0;
569 void *ptr[VLIB_FRAME_SIZE], **p = ptr;
573 if (node->flags & VLIB_NODE_FLAG_TRACE)
574 vnet_interface_output_trace (vm, node, frame, n_buffers);
576 from = vlib_frame_vector_args (frame);
579 return vlib_error_drop_buffers (
581 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
582 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
584 vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */);
586 vlib_get_buffers (vm, from, bufs, n_buffers);
588 si = vnet_get_sw_interface (vnm, sw_if_index);
589 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
591 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
592 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
594 vlib_simple_counter_main_t *cm;
596 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
597 VNET_INTERFACE_COUNTER_TX_ERROR);
598 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
600 return vlib_error_drop_buffers (
602 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
603 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
606 if (hi->output_node_thread_runtimes)
607 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
612 * tx queue of given interface is not available on given thread
614 if (r->n_queues == 0)
615 return vlib_error_drop_buffers (
617 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
618 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE);
620 * multiple tx queues available on given thread
622 else if (r->n_queues > 1)
623 /* construct array of pointer */
627 /* interface-output feature arc handling */
628 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
630 vnet_feature_config_main_t *fcm;
631 fcm = vnet_feature_get_config_main (arc);
632 config_index = vnet_get_feature_config_index (arc, sw_if_index);
633 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
636 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
639 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
641 /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
642 * here before sending to the interface */
643 if ((hi->caps & VNET_HW_IF_CAP_TX_CKSUM) != VNET_HW_IF_CAP_TX_CKSUM)
647 if (do_tx_offloads == 0 && arc_or_subif == 0 && is_parr == 0)
648 n_bytes = vnet_interface_output_node_inline (
649 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 0);
650 // basic processing + tx offloads
651 else if (do_tx_offloads == 1 && arc_or_subif == 0 && is_parr == 0)
652 n_bytes = vnet_interface_output_node_inline (
653 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 1);
654 // basic processing + tx offloads + vlans + arcs
655 else if (do_tx_offloads == 1 && arc_or_subif == 1 && is_parr == 0)
656 n_bytes = vnet_interface_output_node_inline (
657 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 2);
658 // basic processing + tx offloads + vlans + arcs + multi-txqs
660 n_bytes = vnet_interface_output_node_inline (
661 vm, sw_if_index, ccm, bufs, p, config_index, arc, n_buffers, 3);
663 from = vlib_frame_vector_args (frame);
664 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
666 enqueue_to_tx_node (vm, node, hi, next_index, r, from, ptr,
671 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
675 /* Update main interface stats. */
676 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
680 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
681 .name = "interface-output-template",
682 .vector_size = sizeof (u32),
685 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
686 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
687 vlib_node_runtime_t *
689 vlib_frame_t * frame)
691 vnet_main_t *vnm = vnet_get_main ();
692 u32 n_left_to_next, *from, *to_next;
693 u32 n_left_from, next_index;
695 vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* in_interface_ouput */);
697 n_left_from = frame->n_vectors;
699 from = vlib_frame_vector_args (frame);
700 next_index = node->cached_next_index;
702 while (n_left_from > 0)
704 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
706 while (n_left_from >= 4 && n_left_to_next >= 2)
708 u32 bi0, bi1, next0, next1;
709 vlib_buffer_t *b0, *b1;
710 vnet_hw_interface_t *hi0, *hi1;
712 /* Prefetch next iteration. */
713 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
714 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
725 b0 = vlib_get_buffer (vm, bi0);
726 b1 = vlib_get_buffer (vm, bi1);
729 vnet_get_sup_hw_interface (vnm,
730 vnet_buffer (b0)->sw_if_index
733 vnet_get_sup_hw_interface (vnm,
734 vnet_buffer (b1)->sw_if_index
737 next0 = hi0->output_node_next_index;
738 next1 = hi1->output_node_next_index;
740 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
741 n_left_to_next, bi0, bi1, next0,
745 while (n_left_from > 0 && n_left_to_next > 0)
749 vnet_hw_interface_t *hi0;
758 b0 = vlib_get_buffer (vm, bi0);
761 vnet_get_sup_hw_interface (vnm,
762 vnet_buffer (b0)->sw_if_index
765 next0 = hi0->output_node_next_index;
767 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
768 n_left_to_next, bi0, next0);
771 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
774 return frame->n_vectors;
777 typedef struct vnet_error_trace_t_
784 ip46_address_t src, dst;
785 } vnet_error_trace_t;
788 format_vnet_error_trace (u8 * s, va_list * va)
790 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
791 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
792 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
794 /* Normal, non-catchup trace */
795 if (t->details_valid == 0)
797 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
798 vnet_get_main (), t->sw_if_index);
800 else if (t->details_valid == 1)
802 /* The trace capture code didn't understant the mactype */
803 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
805 else if (t->details_valid == 2)
807 /* Dump the src/dst addresses */
809 s = format (s, "IP4: %U -> %U",
810 format_ip4_address, &t->src.ip4,
811 format_ip4_address, &t->dst.ip4);
813 s = format (s, "IP6: %U -> %U",
814 format_ip6_address, &t->src.ip6,
815 format_ip6_address, &t->dst.ip6);
821 interface_trace_buffers (vlib_main_t * vm,
822 vlib_node_runtime_t * node, vlib_frame_t * frame)
824 u32 n_left, *buffers;
826 buffers = vlib_frame_vector_args (frame);
827 n_left = frame->n_vectors;
832 vlib_buffer_t *b0, *b1;
833 vnet_error_trace_t *t0, *t1;
835 /* Prefetch next iteration. */
836 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
837 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
842 b0 = vlib_get_buffer (vm, bi0);
843 b1 = vlib_get_buffer (vm, bi1);
845 if (b0->flags & VLIB_BUFFER_IS_TRACED)
847 t0 = vlib_add_trace (vm, node, b0,
848 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
849 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
850 t0->details_valid = 0;
852 if (b1->flags & VLIB_BUFFER_IS_TRACED)
854 t1 = vlib_add_trace (vm, node, b1,
855 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
856 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
857 t1->details_valid = 0;
867 vnet_error_trace_t *t0;
871 b0 = vlib_get_buffer (vm, bi0);
873 if (b0->flags & VLIB_BUFFER_IS_TRACED)
875 t0 = vlib_add_trace (vm, node, b0,
876 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
877 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
878 t0->details_valid = 0;
887 VNET_ERROR_DISPOSITION_DROP,
888 VNET_ERROR_DISPOSITION_PUNT,
889 VNET_ERROR_N_DISPOSITION,
890 } vnet_error_disposition_t;
893 drop_catchup_trace (vlib_main_t * vm,
894 vlib_node_runtime_t * node, vlib_buffer_t * b)
896 /* Can we safely rewind the buffer? If not, fagedaboudit */
897 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
899 vnet_error_trace_t *t;
902 ethernet_header_t *eh;
905 t = vlib_add_trace (vm, node, b, sizeof (*t));
906 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
907 vlib_buffer_advance (b, delta);
909 eh = vlib_buffer_get_current (b);
911 t->mactype = clib_net_to_host_u16 (eh->type);
912 t->details_valid = 1;
915 case ETHERNET_TYPE_IP4:
916 ip4 = (void *) (eh + 1);
917 t->details_valid = 2;
919 t->src.ip4.as_u32 = ip4->src_address.as_u32;
920 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
923 case ETHERNET_TYPE_IP6:
924 ip6 = (void *) (eh + 1);
925 t->details_valid = 2;
927 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
928 sizeof (ip6_address_t));
929 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
930 sizeof (ip6_address_t));
934 /* Dunno, do nothing, leave details_valid alone */
937 /* Restore current data (probably unnecessary) */
938 vlib_buffer_advance (b, -delta);
942 static_always_inline uword
943 interface_drop_punt (vlib_main_t * vm,
944 vlib_node_runtime_t * node,
945 vlib_frame_t * frame,
946 vnet_error_disposition_t disposition)
948 u32 *from, n_left, thread_index, *sw_if_index;
949 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
950 u32 sw_if_indices[VLIB_FRAME_SIZE];
951 vlib_simple_counter_main_t *cm;
952 u16 nexts[VLIB_FRAME_SIZE];
956 vnm = vnet_get_main ();
957 thread_index = vm->thread_index;
958 from = vlib_frame_vector_args (frame);
959 n_left = frame->n_vectors;
961 sw_if_index = sw_if_indices;
963 vlib_get_buffers (vm, from, bufs, n_left);
965 /* "trace add error-drop NNN?" */
966 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
968 /* If pkts aren't otherwise traced... */
969 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
971 /* Trace them from here */
972 node->flags |= VLIB_NODE_FLAG_TRACE;
973 while (n_trace && n_left)
976 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
977 0 /* follow chain */ )))
980 * Here we have a wireshark dissector problem.
981 * Packets may be well-formed, or not. We
982 * must not blow chunks in any case.
984 * Try to produce trace records which will help
985 * folks understand what's going on.
987 drop_catchup_trace (vm, node, b[0]);
995 vlib_set_trace_count (vm, node, n_trace);
997 n_left = frame->n_vectors;
1000 if (node->flags & VLIB_NODE_FLAG_TRACE)
1001 interface_trace_buffers (vm, node, frame);
1003 /* All going to drop regardless, this is just a counting exercise */
1004 clib_memset (nexts, 0, sizeof (nexts));
1006 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1007 (disposition == VNET_ERROR_DISPOSITION_PUNT
1008 ? VNET_INTERFACE_COUNTER_PUNT
1009 : VNET_INTERFACE_COUNTER_DROP));
1011 /* collect the array of interfaces first ... */
1016 /* Prefetch 8 ahead - there's not much going on in each iteration */
1017 vlib_prefetch_buffer_header (b[4], LOAD);
1018 vlib_prefetch_buffer_header (b[5], LOAD);
1019 vlib_prefetch_buffer_header (b[6], LOAD);
1020 vlib_prefetch_buffer_header (b[7], LOAD);
1022 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1023 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1024 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1025 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1033 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1040 /* ... then count against them in blocks */
1041 n_left = frame->n_vectors;
1045 vnet_sw_interface_t *sw_if0;
1048 off = frame->n_vectors - n_left;
1050 sw_if_index = sw_if_indices + off;
1052 count = clib_count_equal_u32 (sw_if_index, n_left);
1055 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1057 /* Increment super-interface drop/punt counters for
1059 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1060 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1061 vlib_increment_simple_counter
1062 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1065 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1067 return frame->n_vectors;
1071 pcap_drop_trace (vlib_main_t * vm,
1072 vnet_interface_main_t * im,
1073 vnet_pcap_t * pp, vlib_frame_t * f)
1076 u32 n_left = f->n_vectors;
1077 vlib_buffer_t *b0, *p1;
1079 i16 save_current_data;
1080 u16 save_current_length;
1081 vlib_error_main_t *em = &vm->error_main;
1083 from = vlib_frame_vector_args (f);
1087 if (PREDICT_TRUE (n_left > 1))
1089 p1 = vlib_get_buffer (vm, from[1]);
1090 vlib_prefetch_buffer_header (p1, LOAD);
1094 b0 = vlib_get_buffer (vm, bi0);
1098 /* See if we're pointedly ignoring this specific error */
1099 if (im->pcap_drop_filter_hash
1100 && hash_get (im->pcap_drop_filter_hash, b0->error))
1103 if (!vnet_is_packet_pcaped (pp, b0, ~0))
1104 continue; /* not matching, skip */
1106 /* Trace all drops, or drops received on a specific interface */
1107 save_current_data = b0->current_data;
1108 save_current_length = b0->current_length;
1111 * Typically, we'll need to rewind the buffer
1112 * if l2_hdr_offset is valid, make sure to rewind to the start of
1113 * the L2 header. This may not be the buffer start in case we pop-ed
1115 * Otherwise, rewind to buffer start and hope for the best.
1117 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
1119 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
1120 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
1123 else if (b0->current_data > 0)
1125 vlib_buffer_advance (b0, (word) -b0->current_data);
1129 vlib_buffer_t *last = b0;
1130 u32 error_node_index;
1131 int drop_string_len;
1133 /* Length of the error string */
1134 int error_string_len =
1135 clib_strnlen (em->counters_heap[b0->error].name, 128);
1137 /* Dig up the drop node */
1138 error_node_index = vm->node_main.node_by_error[b0->error];
1139 n = vlib_get_node (vm, error_node_index);
1141 /* Length of full drop string, w/ "nodename: " prepended */
1142 drop_string_len = error_string_len + vec_len (n->name) + 2;
1144 /* Find the last buffer in the chain */
1145 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
1146 last = vlib_get_buffer (vm, last->next_buffer);
1149 * Append <nodename>: <error-string> to the capture,
1150 * only if we can do that without allocating a new buffer.
1152 if (PREDICT_TRUE ((last->current_data + last->current_length) <
1153 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
1155 clib_memcpy_fast (last->data + last->current_data +
1156 last->current_length,
1157 n->name, vec_len (n->name));
1158 clib_memcpy_fast (last->data + last->current_data +
1159 last->current_length + vec_len (n->name),
1161 clib_memcpy_fast (last->data + last->current_data +
1162 last->current_length + vec_len (n->name) + 2,
1163 em->counters_heap[b0->error].name,
1165 last->current_length += drop_string_len;
1166 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1167 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1168 last->current_length -= drop_string_len;
1169 b0->current_data = save_current_data;
1170 b0->current_length = save_current_length;
1176 * Didn't have space in the last buffer, here's the dropped
1179 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1181 b0->current_data = save_current_data;
1182 b0->current_length = save_current_length;
1186 #ifndef CLIB_MARCH_VARIANT
1188 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1190 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1192 if (im->pcap_drop_filter_hash == 0)
1193 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1196 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1198 hash_unset (im->pcap_drop_filter_hash, error_index);
1200 #endif /* CLIB_MARCH_VARIANT */
1202 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1203 vlib_node_runtime_t * node,
1204 vlib_frame_t * frame)
1206 vnet_main_t *vnm = vnet_get_main ();
1207 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1208 vnet_pcap_t *pp = &vnm->pcap;
1210 if (PREDICT_FALSE (pp->pcap_drop_enable))
1211 pcap_drop_trace (vm, im, pp, frame);
1213 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1216 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1217 vlib_node_runtime_t * node,
1218 vlib_frame_t * frame)
1220 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1224 VLIB_REGISTER_NODE (interface_drop) = {
1225 .name = "error-drop",
1226 .vector_size = sizeof (u32),
1227 .format_trace = format_vnet_error_trace,
1228 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1237 VLIB_REGISTER_NODE (interface_punt) = {
1238 .name = "error-punt",
1239 .vector_size = sizeof (u32),
1240 .format_trace = format_vnet_error_trace,
1241 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1249 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1250 .name = "interface-output",
1251 .vector_size = sizeof (u32),
1254 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1255 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1257 vnet_main_t *vnm = vnet_get_main ();
1258 vnet_interface_main_t *im = &vnm->interface_main;
1259 vnet_hw_interface_t *hi;
1260 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1261 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1262 vlib_frame_bitmap_t used_elts = {}, mask = {};
1263 u32 *tmp, *from, n_left, n_comp, n_p_comp, swif, off;
1265 void *ptr[VLIB_FRAME_SIZE], **p = ptr;
1267 from = vlib_frame_vector_args (frame);
1268 n_left = frame->n_vectors;
1269 vlib_get_buffers (vm, from, bufs, n_left);
1273 vlib_prefetch_buffer_header (b[4], LOAD);
1274 vlib_prefetch_buffer_header (b[5], LOAD);
1275 vlib_prefetch_buffer_header (b[6], LOAD);
1276 vlib_prefetch_buffer_header (b[7], LOAD);
1278 p[0] = vlib_buffer_get_current (b[0]);
1279 p[1] = vlib_buffer_get_current (b[1]);
1280 p[2] = vlib_buffer_get_current (b[2]);
1281 p[3] = vlib_buffer_get_current (b[3]);
1282 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1283 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1284 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1285 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1295 p[0] = vlib_buffer_get_current (b[0]);
1296 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1303 n_left = frame->n_vectors;
1304 swif = sw_if_indices[0];
1307 /* a bit ugly but it allows us to reuse stack space for temporary store
1308 * which may also improve memory latency */
1312 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1313 hi = vnet_get_sup_hw_interface (vnm, swif);
1314 vnet_hw_if_output_node_runtime_t *r = 0;
1315 void *ptr_tmp[VLIB_FRAME_SIZE], **p_tmp = ptr_tmp;
1317 if (hi->output_node_thread_runtimes)
1318 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1320 /* compare and compress based on comparison mask */
1321 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1322 n_comp = clib_compress_u32 (tmp, from, mask, frame->n_vectors);
1325 * tx queue of given interface is not available on given thread
1329 if (r->n_queues == 0)
1331 vlib_error_drop_buffers (
1333 /* buffer stride */ 1, n_comp, VNET_INTERFACE_OUTPUT_NEXT_DROP,
1334 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE);
1337 else if (r->n_queues > 1)
1339 n_p_comp = clib_compress_u64 ((u64 *) p_tmp, (u64 *) ptr, mask,
1341 ASSERT (n_p_comp == n_comp);
1345 enqueue_to_tx_node (vm, node, hi, next_index, r, tmp, ptr_tmp, n_comp);
1351 /* store comparison mask so we can find next unused element */
1352 vlib_frame_bitmap_or (used_elts, mask);
1354 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1355 while (PREDICT_FALSE (used_elts[off] == ~0))
1359 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1363 return frame->n_vectors;
1366 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1367 .name = "interface-output-arc-end",
1368 .vector_size = sizeof (u32),
1375 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1376 .arc_name = "interface-output",
1377 .start_nodes = VNET_FEATURES (0),
1378 .last_in_arc = "interface-output-arc-end",
1379 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1382 VNET_FEATURE_INIT (span_tx, static) = {
1383 .arc_name = "interface-output",
1384 .node_name = "span-output",
1385 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1388 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1389 .arc_name = "interface-output",
1390 .node_name = "ipsec-if-output",
1391 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1394 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1395 .arc_name = "interface-output",
1396 .node_name = "interface-output-arc-end",
1400 #ifndef CLIB_MARCH_VARIANT
1402 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1406 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1409 if (hi->output_node_index == 0)
1412 next_index = vlib_node_add_next
1413 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1414 hi->output_node_index);
1415 hi->output_node_next_index = next_index;
1420 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1421 (vnet_per_buffer_interface_output_hw_interface_add_del);
1424 vnet_set_interface_output_node (vnet_main_t * vnm,
1425 u32 hw_if_index, u32 node_index)
1427 ASSERT (node_index);
1428 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1429 u32 next_index = vlib_node_add_next
1430 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1431 hi->output_node_next_index = next_index;
1432 hi->output_node_index = node_index;
1434 #endif /* CLIB_MARCH_VARIANT */
1437 * fd.io coding-style-patch-verification: ON
1440 * eval: (c-set-style "gnu")