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);
88 s = format (s, "%U flags 0x%08x", format_vnet_sw_interface_name, vnm,
92 format (s, "\n%U%U", format_white_space, indent,
93 node->format_buffer ? node->format_buffer : format_hex_bytes,
94 t->data, sizeof (t->data));
98 #endif /* CLIB_MARCH_VARIANT */
101 vnet_interface_output_trace (vlib_main_t * vm,
102 vlib_node_runtime_t * node,
103 vlib_frame_t * frame, uword n_buffers)
108 from = vlib_frame_vector_args (frame);
113 vlib_buffer_t *b0, *b1;
114 interface_output_trace_t *t0, *t1;
116 /* Prefetch next iteration. */
117 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
118 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
123 b0 = vlib_get_buffer (vm, bi0);
124 b1 = vlib_get_buffer (vm, bi1);
126 if (b0->flags & VLIB_BUFFER_IS_TRACED)
128 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
129 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
130 t0->flags = b0->flags;
131 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
134 if (b1->flags & VLIB_BUFFER_IS_TRACED)
136 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
137 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
138 t1->flags = b1->flags;
139 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
150 interface_output_trace_t *t0;
154 b0 = vlib_get_buffer (vm, bi0);
156 if (b0->flags & VLIB_BUFFER_IS_TRACED)
158 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
159 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
160 t0->flags = b0->flags;
161 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
169 static_always_inline void
170 vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b)
172 if (b->flags & VNET_BUFFER_F_GSO)
174 vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4,
175 b->flags & VNET_BUFFER_F_IS_IP6);
176 vnet_calc_outer_checksums_inline (vm, b);
179 static_always_inline uword
180 vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index,
181 vlib_combined_counter_main_t *ccm,
182 vlib_buffer_t **b, void **p,
183 u32 config_index, u8 arc, u32 n_left,
184 int processing_level)
187 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
188 u32 ti = vm->thread_index;
194 /* Prefetch next iteration. */
195 vlib_prefetch_buffer_header (b[4], LOAD);
196 vlib_prefetch_buffer_header (b[5], LOAD);
197 vlib_prefetch_buffer_header (b[6], LOAD);
198 vlib_prefetch_buffer_header (b[7], LOAD);
200 if (processing_level >= 1)
201 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
203 /* Be grumpy about zero length buffers for benefit of
204 driver tx function. */
205 ASSERT (b[0]->current_length > 0);
206 ASSERT (b[1]->current_length > 0);
207 ASSERT (b[2]->current_length > 0);
208 ASSERT (b[3]->current_length > 0);
210 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
211 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
212 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
213 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
215 if (processing_level >= 3)
217 p[0] = vlib_buffer_get_current (b[0]);
218 p[1] = vlib_buffer_get_current (b[1]);
219 p[2] = vlib_buffer_get_current (b[2]);
220 p[3] = vlib_buffer_get_current (b[3]);
224 if (processing_level >= 2)
226 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
227 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
228 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
229 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
230 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
232 /* update vlan subif tx counts, if required */
233 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
234 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
236 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
237 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
239 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
240 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
242 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
243 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
245 if (PREDICT_FALSE (config_index != ~0))
247 vnet_buffer (b[0])->feature_arc_index = arc;
248 b[0]->current_config_index = config_index;
249 vnet_buffer (b[1])->feature_arc_index = arc;
250 b[1]->current_config_index = config_index;
251 vnet_buffer (b[2])->feature_arc_index = arc;
252 b[2]->current_config_index = config_index;
253 vnet_buffer (b[3])->feature_arc_index = arc;
254 b[3]->current_config_index = config_index;
258 if (processing_level >= 1 && (or_flags & VNET_BUFFER_F_OFFLOAD))
260 vnet_interface_output_handle_offload (vm, b[0]);
261 vnet_interface_output_handle_offload (vm, b[1]);
262 vnet_interface_output_handle_offload (vm, b[2]);
263 vnet_interface_output_handle_offload (vm, b[3]);
272 /* Be grumpy about zero length buffers for benefit of
273 driver tx function. */
274 ASSERT (b[0]->current_length > 0);
276 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
278 if (processing_level >= 3)
280 p[0] = vlib_buffer_get_current (b[0]);
284 if (processing_level >= 2)
286 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
288 if (PREDICT_FALSE (config_index != ~0))
290 vnet_buffer (b[0])->feature_arc_index = arc;
291 b[0]->current_config_index = config_index;
294 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
295 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
298 if (processing_level >= 1)
299 vnet_interface_output_handle_offload (vm, b[0]);
308 static_always_inline void
309 vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
310 vlib_frame_t *frame, int in_interface_ouput)
312 vnet_main_t *vnm = vnet_get_main ();
313 u32 n_left_from, *from;
314 u32 sw_if_index = ~0, hw_if_index = ~0;
315 vnet_pcap_t *pp = &vnm->pcap;
317 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
320 if (in_interface_ouput)
322 /* interface-output is called right before interface-output-template.
323 * We only want to capture packets here if there is a per-interface
324 * filter, in case it matches the sub-interface sw_if_index.
325 * If there is no per-interface filter configured, let the
326 * interface-output-template node deal with it */
327 if (pp->pcap_sw_if_index == 0)
332 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
333 sw_if_index = rt->sw_if_index;
336 n_left_from = frame->n_vectors;
337 from = vlib_frame_vector_args (frame);
339 while (n_left_from > 0)
342 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
346 if (in_interface_ouput)
348 const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX];
349 if (PREDICT_FALSE (sii != sw_if_index))
351 const vnet_hw_interface_t *hi =
352 vnet_get_sup_hw_interface (vnm, sii);
353 hw_if_index = hi->sw_if_index;
356 if (hw_if_index == sw_if_index)
357 continue; /* defer to interface-output-template */
360 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
361 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
365 static_always_inline void
366 hash_func_with_mask (void **p, u32 *hash, u32 n_packets, u32 *lookup_table,
367 u32 mask, vnet_hash_fn_t hf)
369 u32 n_left_from = n_packets;
371 hf (p, hash, n_packets);
373 clib_array_mask_u32 (hash, mask, n_packets);
375 while (n_left_from >= 4)
377 hash[0] = lookup_table[hash[0]];
378 hash[1] = lookup_table[hash[1]];
379 hash[2] = lookup_table[hash[2]];
380 hash[3] = lookup_table[hash[3]];
386 while (n_left_from > 0)
388 hash[0] = lookup_table[hash[0]];
395 static_always_inline void
396 store_tx_frame_scalar_data (vnet_hw_if_tx_frame_t *copy_frame,
397 vnet_hw_if_tx_frame_t *tf)
400 clib_memcpy_fast (tf, copy_frame, sizeof (vnet_hw_if_tx_frame_t));
403 static_always_inline u32
404 enqueue_one_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node, u32 *ppqi,
405 u32 *from, vnet_hw_if_tx_frame_t *copy_frame,
406 u32 n_vectors, u32 n_left, u32 next_index)
408 u32 tmp[VLIB_FRAME_SIZE];
409 vlib_frame_bitmap_t mask = {};
411 vnet_hw_if_tx_frame_t *tf;
413 u32 n_copy = 0, n_free = 0;
415 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
416 tf = vlib_frame_scalar_args (f);
418 if (f->n_vectors > 0 &&
419 (!copy_frame || (tf->queue_id == copy_frame->queue_id)))
421 /* append current next frame */
422 n_free = VLIB_FRAME_SIZE - f->n_vectors;
424 * if frame contains enough space for worst case scenario,
425 * we can avoid use of tmp
427 if (n_free >= n_left)
428 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
434 if (f->n_vectors > 0)
436 /* current frame doesn't fit - grab empty one */
437 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
438 tf = vlib_frame_scalar_args (f);
441 /* empty frame - store scalar data */
442 store_tx_frame_scalar_data (copy_frame, tf);
443 to = vlib_frame_vector_args (f);
444 n_free = VLIB_FRAME_SIZE;
448 * per packet queue id array
449 * compare with given queue_id, if match, copy respective buffer index from
454 clib_mask_compare_u32 (copy_frame->queue_id, ppqi, mask, n_vectors);
455 n_copy = clib_compress_u32 (to, from, mask, n_vectors);
463 * no work required, just copy all buffer indices from -> to
466 vlib_buffer_copy_indices (to, from, n_copy);
471 /* indices already written to frame, just close it */
472 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
474 else if (n_free >= n_copy)
476 /* enough space in the existing frame */
477 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
478 vlib_buffer_copy_indices (to, tmp, n_copy);
479 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
484 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
485 vlib_buffer_copy_indices (to, tmp, n_free);
486 vlib_put_next_frame (vm, node, next_index, 0);
489 u32 n_2nd_frame = n_copy - n_free;
490 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
491 tf = vlib_frame_scalar_args (f);
492 /* empty frame - store scalar data */
493 store_tx_frame_scalar_data (copy_frame, tf);
494 to = vlib_frame_vector_args (f);
495 vlib_buffer_copy_indices (to, tmp + n_free, n_2nd_frame);
496 vlib_put_next_frame (vm, node, next_index,
497 VLIB_FRAME_SIZE - n_2nd_frame);
500 return n_left - n_copy;
503 static_always_inline void
504 enqueue_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
505 vnet_hw_interface_t *hi, u32 next_index,
506 vnet_hw_if_output_node_runtime_t *r, u32 *from, void **p,
509 u32 n_left = n_vectors;
511 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
514 * backward compatible for drivers not integrated with new tx infra.
518 n_left = enqueue_one_to_tx_node (vm, node, NULL, from, NULL, n_vectors,
522 * only 1 tx queue of given interface is available on given thread
524 else if (r->n_queues == 1)
526 n_left = enqueue_one_to_tx_node (vm, node, NULL, from, r->frame,
527 n_vectors, n_left, next_index);
530 * multi tx-queues use case
532 else if (r->n_queues > 1)
534 u32 qids[VLIB_FRAME_SIZE];
536 hash_func_with_mask (p, qids, n_vectors, r->lookup_table,
537 vec_len (r->lookup_table) - 1, hi->hf);
539 for (u32 i = 0; i < r->n_queues; i++)
541 n_left = enqueue_one_to_tx_node (vm, node, qids, from, &r->frame[i],
542 n_vectors, n_left, next_index);
551 VLIB_NODE_FN (vnet_interface_output_node)
552 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
554 vnet_main_t *vnm = vnet_get_main ();
555 vnet_interface_main_t *im = &vnm->interface_main;
556 vlib_combined_counter_main_t *ccm;
557 vnet_hw_interface_t *hi;
558 vnet_sw_interface_t *si;
559 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
560 vnet_hw_if_output_node_runtime_t *r = 0;
561 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
562 u32 n_bytes, n_buffers = frame->n_vectors;
563 u32 config_index = ~0;
564 u32 sw_if_index = rt->sw_if_index;
565 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
566 u32 ti = vm->thread_index;
567 u8 arc = im->output_feature_arc_index;
568 int arc_or_subif = 0;
569 int do_tx_offloads = 0;
570 void *ptr[VLIB_FRAME_SIZE], **p = ptr;
574 if (node->flags & VLIB_NODE_FLAG_TRACE)
575 vnet_interface_output_trace (vm, node, frame, n_buffers);
577 from = vlib_frame_vector_args (frame);
580 return vlib_error_drop_buffers (
582 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
583 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
585 vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */);
587 vlib_get_buffers (vm, from, bufs, n_buffers);
589 si = vnet_get_sw_interface (vnm, sw_if_index);
590 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
592 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
593 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
595 vlib_simple_counter_main_t *cm;
597 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
598 VNET_INTERFACE_COUNTER_TX_ERROR);
599 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
601 return vlib_error_drop_buffers (
603 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
604 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
607 if (hi->output_node_thread_runtimes)
608 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
613 * tx queue of given interface is not available on given thread
615 if (r->n_queues == 0)
616 return vlib_error_drop_buffers (
618 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
619 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE);
621 * multiple tx queues available on given thread
623 else if (r->n_queues > 1)
624 /* construct array of pointer */
628 /* interface-output feature arc handling */
629 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
631 vnet_feature_config_main_t *fcm;
632 fcm = vnet_feature_get_config_main (arc);
633 config_index = vnet_get_feature_config_index (arc, sw_if_index);
634 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
637 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
640 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
642 /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
643 * here before sending to the interface */
644 if ((hi->caps & VNET_HW_IF_CAP_TX_CKSUM) != VNET_HW_IF_CAP_TX_CKSUM)
648 if (do_tx_offloads == 0 && arc_or_subif == 0 && is_parr == 0)
649 n_bytes = vnet_interface_output_node_inline (
650 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 0);
651 // basic processing + tx offloads
652 else if (do_tx_offloads == 1 && arc_or_subif == 0 && is_parr == 0)
653 n_bytes = vnet_interface_output_node_inline (
654 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 1);
655 // basic processing + tx offloads + vlans + arcs
656 else if (do_tx_offloads == 1 && arc_or_subif == 1 && is_parr == 0)
657 n_bytes = vnet_interface_output_node_inline (
658 vm, sw_if_index, ccm, bufs, NULL, config_index, arc, n_buffers, 2);
659 // basic processing + tx offloads + vlans + arcs + multi-txqs
661 n_bytes = vnet_interface_output_node_inline (
662 vm, sw_if_index, ccm, bufs, p, config_index, arc, n_buffers, 3);
664 from = vlib_frame_vector_args (frame);
665 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
667 enqueue_to_tx_node (vm, node, hi, next_index, r, from, ptr,
672 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
676 /* Update main interface stats. */
677 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
681 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
682 .name = "interface-output-template",
683 .vector_size = sizeof (u32),
686 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
687 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
688 vlib_node_runtime_t *
690 vlib_frame_t * frame)
692 vnet_main_t *vnm = vnet_get_main ();
693 u32 n_left_to_next, *from, *to_next;
694 u32 n_left_from, next_index;
696 vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* in_interface_ouput */);
698 n_left_from = frame->n_vectors;
700 from = vlib_frame_vector_args (frame);
701 next_index = node->cached_next_index;
703 while (n_left_from > 0)
705 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
707 while (n_left_from >= 4 && n_left_to_next >= 2)
709 u32 bi0, bi1, next0, next1;
710 vlib_buffer_t *b0, *b1;
711 vnet_hw_interface_t *hi0, *hi1;
713 /* Prefetch next iteration. */
714 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
715 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
726 b0 = vlib_get_buffer (vm, bi0);
727 b1 = vlib_get_buffer (vm, bi1);
730 vnet_get_sup_hw_interface (vnm,
731 vnet_buffer (b0)->sw_if_index
734 vnet_get_sup_hw_interface (vnm,
735 vnet_buffer (b1)->sw_if_index
738 next0 = hi0->output_node_next_index;
739 next1 = hi1->output_node_next_index;
741 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
742 n_left_to_next, bi0, bi1, next0,
746 while (n_left_from > 0 && n_left_to_next > 0)
750 vnet_hw_interface_t *hi0;
759 b0 = vlib_get_buffer (vm, bi0);
762 vnet_get_sup_hw_interface (vnm,
763 vnet_buffer (b0)->sw_if_index
766 next0 = hi0->output_node_next_index;
768 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
769 n_left_to_next, bi0, next0);
772 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
775 return frame->n_vectors;
778 typedef struct vnet_error_trace_t_
785 ip46_address_t src, dst;
786 } vnet_error_trace_t;
789 format_vnet_error_trace (u8 * s, va_list * va)
791 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
792 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
793 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
795 /* Normal, non-catchup trace */
796 if (t->details_valid == 0)
798 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
799 vnet_get_main (), t->sw_if_index);
801 else if (t->details_valid == 1)
803 /* The trace capture code didn't understant the mactype */
804 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
806 else if (t->details_valid == 2)
808 /* Dump the src/dst addresses */
810 s = format (s, "IP4: %U -> %U",
811 format_ip4_address, &t->src.ip4,
812 format_ip4_address, &t->dst.ip4);
814 s = format (s, "IP6: %U -> %U",
815 format_ip6_address, &t->src.ip6,
816 format_ip6_address, &t->dst.ip6);
822 interface_trace_buffers (vlib_main_t * vm,
823 vlib_node_runtime_t * node, vlib_frame_t * frame)
825 u32 n_left, *buffers;
827 buffers = vlib_frame_vector_args (frame);
828 n_left = frame->n_vectors;
833 vlib_buffer_t *b0, *b1;
834 vnet_error_trace_t *t0, *t1;
836 /* Prefetch next iteration. */
837 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
838 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
843 b0 = vlib_get_buffer (vm, bi0);
844 b1 = vlib_get_buffer (vm, bi1);
846 if (b0->flags & VLIB_BUFFER_IS_TRACED)
848 t0 = vlib_add_trace (vm, node, b0,
849 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
850 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
851 t0->details_valid = 0;
853 if (b1->flags & VLIB_BUFFER_IS_TRACED)
855 t1 = vlib_add_trace (vm, node, b1,
856 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
857 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
858 t1->details_valid = 0;
868 vnet_error_trace_t *t0;
872 b0 = vlib_get_buffer (vm, bi0);
874 if (b0->flags & VLIB_BUFFER_IS_TRACED)
876 t0 = vlib_add_trace (vm, node, b0,
877 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
878 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
879 t0->details_valid = 0;
888 VNET_ERROR_DISPOSITION_DROP,
889 VNET_ERROR_DISPOSITION_PUNT,
890 VNET_ERROR_N_DISPOSITION,
891 } vnet_error_disposition_t;
894 drop_catchup_trace (vlib_main_t * vm,
895 vlib_node_runtime_t * node, vlib_buffer_t * b)
897 /* Can we safely rewind the buffer? If not, fagedaboudit */
898 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
900 vnet_error_trace_t *t;
903 ethernet_header_t *eh;
906 t = vlib_add_trace (vm, node, b, sizeof (*t));
907 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
908 vlib_buffer_advance (b, delta);
910 eh = vlib_buffer_get_current (b);
912 t->mactype = clib_net_to_host_u16 (eh->type);
913 t->details_valid = 1;
916 case ETHERNET_TYPE_IP4:
917 ip4 = (void *) (eh + 1);
918 t->details_valid = 2;
920 t->src.ip4.as_u32 = ip4->src_address.as_u32;
921 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
924 case ETHERNET_TYPE_IP6:
925 ip6 = (void *) (eh + 1);
926 t->details_valid = 2;
928 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
929 sizeof (ip6_address_t));
930 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
931 sizeof (ip6_address_t));
935 /* Dunno, do nothing, leave details_valid alone */
938 /* Restore current data (probably unnecessary) */
939 vlib_buffer_advance (b, -delta);
943 static_always_inline uword
944 interface_drop_punt (vlib_main_t * vm,
945 vlib_node_runtime_t * node,
946 vlib_frame_t * frame,
947 vnet_error_disposition_t disposition)
949 u32 *from, n_left, thread_index, *sw_if_index;
950 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
951 u32 sw_if_indices[VLIB_FRAME_SIZE];
952 vlib_simple_counter_main_t *cm;
953 u16 nexts[VLIB_FRAME_SIZE];
957 vnm = vnet_get_main ();
958 thread_index = vm->thread_index;
959 from = vlib_frame_vector_args (frame);
960 n_left = frame->n_vectors;
962 sw_if_index = sw_if_indices;
964 vlib_get_buffers (vm, from, bufs, n_left);
966 /* "trace add error-drop NNN?" */
967 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
969 /* If pkts aren't otherwise traced... */
970 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
972 /* Trace them from here */
973 node->flags |= VLIB_NODE_FLAG_TRACE;
974 while (n_trace && n_left)
977 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
978 0 /* follow chain */ )))
981 * Here we have a wireshark dissector problem.
982 * Packets may be well-formed, or not. We
983 * must not blow chunks in any case.
985 * Try to produce trace records which will help
986 * folks understand what's going on.
988 drop_catchup_trace (vm, node, b[0]);
996 vlib_set_trace_count (vm, node, n_trace);
998 n_left = frame->n_vectors;
1001 if (node->flags & VLIB_NODE_FLAG_TRACE)
1002 interface_trace_buffers (vm, node, frame);
1004 /* All going to drop regardless, this is just a counting exercise */
1005 clib_memset (nexts, 0, sizeof (nexts));
1007 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1008 (disposition == VNET_ERROR_DISPOSITION_PUNT
1009 ? VNET_INTERFACE_COUNTER_PUNT
1010 : VNET_INTERFACE_COUNTER_DROP));
1012 /* collect the array of interfaces first ... */
1017 /* Prefetch 8 ahead - there's not much going on in each iteration */
1018 vlib_prefetch_buffer_header (b[4], LOAD);
1019 vlib_prefetch_buffer_header (b[5], LOAD);
1020 vlib_prefetch_buffer_header (b[6], LOAD);
1021 vlib_prefetch_buffer_header (b[7], LOAD);
1023 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1024 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1025 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1026 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1034 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1041 /* ... then count against them in blocks */
1042 n_left = frame->n_vectors;
1046 vnet_sw_interface_t *sw_if0;
1049 off = frame->n_vectors - n_left;
1051 sw_if_index = sw_if_indices + off;
1053 count = clib_count_equal_u32 (sw_if_index, n_left);
1056 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1058 /* Increment super-interface drop/punt counters for
1060 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1061 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1062 vlib_increment_simple_counter
1063 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1066 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1068 return frame->n_vectors;
1072 pcap_drop_trace (vlib_main_t * vm,
1073 vnet_interface_main_t * im,
1074 vnet_pcap_t * pp, vlib_frame_t * f)
1077 u32 n_left = f->n_vectors;
1078 vlib_buffer_t *b0, *p1;
1080 i16 save_current_data;
1081 u16 save_current_length;
1082 vlib_error_main_t *em = &vm->error_main;
1084 from = vlib_frame_vector_args (f);
1088 if (PREDICT_TRUE (n_left > 1))
1090 p1 = vlib_get_buffer (vm, from[1]);
1091 vlib_prefetch_buffer_header (p1, LOAD);
1095 b0 = vlib_get_buffer (vm, bi0);
1099 /* See if we're pointedly ignoring this specific error */
1100 if (im->pcap_drop_filter_hash
1101 && hash_get (im->pcap_drop_filter_hash, b0->error))
1104 if (!vnet_is_packet_pcaped (pp, b0, ~0))
1105 continue; /* not matching, skip */
1107 /* Trace all drops, or drops received on a specific interface */
1108 save_current_data = b0->current_data;
1109 save_current_length = b0->current_length;
1112 * Typically, we'll need to rewind the buffer
1113 * if l2_hdr_offset is valid, make sure to rewind to the start of
1114 * the L2 header. This may not be the buffer start in case we pop-ed
1116 * Otherwise, rewind to buffer start and hope for the best.
1118 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
1120 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
1121 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
1124 else if (b0->current_data > 0)
1126 vlib_buffer_advance (b0, (word) -b0->current_data);
1130 vlib_buffer_t *last = b0;
1131 u32 error_node_index;
1132 int drop_string_len;
1134 /* Length of the error string */
1135 int error_string_len =
1136 clib_strnlen (em->counters_heap[b0->error].name, 128);
1138 /* Dig up the drop node */
1139 error_node_index = vm->node_main.node_by_error[b0->error];
1140 n = vlib_get_node (vm, error_node_index);
1142 /* Length of full drop string, w/ "nodename: " prepended */
1143 drop_string_len = error_string_len + vec_len (n->name) + 2;
1145 /* Find the last buffer in the chain */
1146 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
1147 last = vlib_get_buffer (vm, last->next_buffer);
1150 * Append <nodename>: <error-string> to the capture,
1151 * only if we can do that without allocating a new buffer.
1153 if (PREDICT_TRUE ((last->current_data + last->current_length) <
1154 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
1156 clib_memcpy_fast (last->data + last->current_data +
1157 last->current_length,
1158 n->name, vec_len (n->name));
1159 clib_memcpy_fast (last->data + last->current_data +
1160 last->current_length + vec_len (n->name),
1162 clib_memcpy_fast (last->data + last->current_data +
1163 last->current_length + vec_len (n->name) + 2,
1164 em->counters_heap[b0->error].name,
1166 last->current_length += drop_string_len;
1167 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1168 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1169 last->current_length -= drop_string_len;
1170 b0->current_data = save_current_data;
1171 b0->current_length = save_current_length;
1177 * Didn't have space in the last buffer, here's the dropped
1180 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1182 b0->current_data = save_current_data;
1183 b0->current_length = save_current_length;
1187 #ifndef CLIB_MARCH_VARIANT
1189 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1191 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1193 if (im->pcap_drop_filter_hash == 0)
1194 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1197 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1199 hash_unset (im->pcap_drop_filter_hash, error_index);
1201 #endif /* CLIB_MARCH_VARIANT */
1203 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1204 vlib_node_runtime_t * node,
1205 vlib_frame_t * frame)
1207 vnet_main_t *vnm = vnet_get_main ();
1208 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1209 vnet_pcap_t *pp = &vnm->pcap;
1211 if (PREDICT_FALSE (pp->pcap_drop_enable))
1212 pcap_drop_trace (vm, im, pp, frame);
1214 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1217 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1218 vlib_node_runtime_t * node,
1219 vlib_frame_t * frame)
1221 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1225 VLIB_REGISTER_NODE (interface_drop) = {
1226 .name = "error-drop",
1227 .vector_size = sizeof (u32),
1228 .format_trace = format_vnet_error_trace,
1229 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1238 VLIB_REGISTER_NODE (interface_punt) = {
1239 .name = "error-punt",
1240 .vector_size = sizeof (u32),
1241 .format_trace = format_vnet_error_trace,
1242 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1250 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1251 .name = "interface-output",
1252 .vector_size = sizeof (u32),
1255 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1256 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1258 vnet_main_t *vnm = vnet_get_main ();
1259 vnet_interface_main_t *im = &vnm->interface_main;
1260 vnet_hw_interface_t *hi;
1261 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1262 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1263 vlib_frame_bitmap_t used_elts = {}, mask = {};
1264 u32 *tmp, *from, n_left, n_comp, n_p_comp, swif, off;
1266 void *ptr[VLIB_FRAME_SIZE], **p = ptr;
1268 from = vlib_frame_vector_args (frame);
1269 n_left = frame->n_vectors;
1270 vlib_get_buffers (vm, from, bufs, n_left);
1274 vlib_prefetch_buffer_header (b[4], LOAD);
1275 vlib_prefetch_buffer_header (b[5], LOAD);
1276 vlib_prefetch_buffer_header (b[6], LOAD);
1277 vlib_prefetch_buffer_header (b[7], LOAD);
1279 p[0] = vlib_buffer_get_current (b[0]);
1280 p[1] = vlib_buffer_get_current (b[1]);
1281 p[2] = vlib_buffer_get_current (b[2]);
1282 p[3] = vlib_buffer_get_current (b[3]);
1283 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1284 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1285 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1286 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1296 p[0] = vlib_buffer_get_current (b[0]);
1297 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1304 n_left = frame->n_vectors;
1305 swif = sw_if_indices[0];
1308 /* a bit ugly but it allows us to reuse stack space for temporary store
1309 * which may also improve memory latency */
1313 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1314 hi = vnet_get_sup_hw_interface (vnm, swif);
1315 vnet_hw_if_output_node_runtime_t *r = 0;
1316 void *ptr_tmp[VLIB_FRAME_SIZE], **p_tmp = ptr_tmp;
1318 if (hi->output_node_thread_runtimes)
1319 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1321 /* compare and compress based on comparison mask */
1322 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1323 n_comp = clib_compress_u32 (tmp, from, mask, frame->n_vectors);
1326 * tx queue of given interface is not available on given thread
1330 if (r->n_queues == 0)
1332 vlib_error_drop_buffers (
1334 /* buffer stride */ 1, n_comp, VNET_INTERFACE_OUTPUT_NEXT_DROP,
1335 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_NO_TX_QUEUE);
1338 else if (r->n_queues > 1)
1340 n_p_comp = clib_compress_u64 ((u64 *) p_tmp, (u64 *) ptr, mask,
1342 ASSERT (n_p_comp == n_comp);
1346 enqueue_to_tx_node (vm, node, hi, next_index, r, tmp, ptr_tmp, n_comp);
1352 /* store comparison mask so we can find next unused element */
1353 vlib_frame_bitmap_or (used_elts, mask);
1355 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1356 while (PREDICT_FALSE (used_elts[off] == ~0))
1360 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1364 return frame->n_vectors;
1367 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1368 .name = "interface-output-arc-end",
1369 .vector_size = sizeof (u32),
1376 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1377 .arc_name = "interface-output",
1378 .start_nodes = VNET_FEATURES (0),
1379 .last_in_arc = "interface-output-arc-end",
1380 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1383 VNET_FEATURE_INIT (span_tx, static) = {
1384 .arc_name = "interface-output",
1385 .node_name = "span-output",
1386 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1389 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1390 .arc_name = "interface-output",
1391 .node_name = "ipsec-if-output",
1392 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1395 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1396 .arc_name = "interface-output",
1397 .node_name = "interface-output-arc-end",
1401 #ifndef CLIB_MARCH_VARIANT
1403 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1407 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1410 if (hi->output_node_index == 0)
1413 next_index = vlib_node_add_next
1414 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1415 hi->output_node_index);
1416 hi->output_node_next_index = next_index;
1421 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1422 (vnet_per_buffer_interface_output_hw_interface_add_del);
1425 vnet_set_interface_output_node (vnet_main_t * vnm,
1426 u32 hw_if_index, u32 node_index)
1428 ASSERT (node_index);
1429 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1430 u32 next_index = vlib_node_add_next
1431 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1432 hi->output_node_next_index = next_index;
1433 hi->output_node_index = node_index;
1435 #endif /* CLIB_MARCH_VARIANT */
1438 * fd.io coding-style-patch-verification: ON
1441 * eval: (c-set-style "gnu")