2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * interface_output.c: interface output node
18 * Copyright (c) 2008 Eliot Dresselhaus
20 * Permission is hereby granted, free of charge, to any person obtaining
21 * a copy of this software and associated documentation files (the
22 * "Software"), to deal in the Software without restriction, including
23 * without limitation the rights to use, copy, modify, merge, publish,
24 * distribute, sublicense, and/or sell copies of the Software, and to
25 * permit persons to whom the Software is furnished to do so, subject to
26 * the following conditions:
28 * The above copyright notice and this permission notice shall be
29 * included in all copies or substantial portions of the Software.
31 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
32 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
33 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
34 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
35 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
36 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
37 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
40 #include <vnet/vnet.h>
41 #include <vnet/ip/icmp46_packet.h>
42 #include <vnet/ethernet/packet.h>
43 #include <vnet/ip/format.h>
44 #include <vnet/ip/ip4.h>
45 #include <vnet/ip/ip6.h>
46 #include <vnet/udp/udp_packet.h>
47 #include <vnet/feature/feature.h>
48 #include <vnet/classify/pcap_classify.h>
49 #include <vnet/interface_output.h>
50 #include <vppinfra/vector/mask_compare.h>
51 #include <vppinfra/vector/compress.h>
57 u8 data[128 - 2 * sizeof (u32)];
59 interface_output_trace_t;
61 #ifndef CLIB_MARCH_VARIANT
63 format_vnet_interface_output_trace (u8 * s, va_list * va)
65 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
66 vlib_node_t *node = va_arg (*va, vlib_node_t *);
67 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
68 vnet_main_t *vnm = vnet_get_main ();
69 vnet_sw_interface_t *si;
72 if (t->sw_if_index != (u32) ~ 0)
74 indent = format_get_indent (s);
76 if (pool_is_free_index
77 (vnm->interface_main.sw_interfaces, t->sw_if_index))
79 /* the interface may have been deleted by the time the trace is printed */
80 s = format (s, "sw_if_index: %d ", t->sw_if_index);
84 si = vnet_get_sw_interface (vnm, t->sw_if_index);
86 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
90 format (s, "\n%U%U", format_white_space, indent,
91 node->format_buffer ? node->format_buffer : format_hex_bytes,
92 t->data, sizeof (t->data));
96 #endif /* CLIB_MARCH_VARIANT */
99 vnet_interface_output_trace (vlib_main_t * vm,
100 vlib_node_runtime_t * node,
101 vlib_frame_t * frame, uword n_buffers)
106 from = vlib_frame_vector_args (frame);
111 vlib_buffer_t *b0, *b1;
112 interface_output_trace_t *t0, *t1;
114 /* Prefetch next iteration. */
115 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
116 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
121 b0 = vlib_get_buffer (vm, bi0);
122 b1 = vlib_get_buffer (vm, bi1);
124 if (b0->flags & VLIB_BUFFER_IS_TRACED)
126 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
127 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
128 t0->flags = b0->flags;
129 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
132 if (b1->flags & VLIB_BUFFER_IS_TRACED)
134 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
135 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
136 t1->flags = b1->flags;
137 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
148 interface_output_trace_t *t0;
152 b0 = vlib_get_buffer (vm, bi0);
154 if (b0->flags & VLIB_BUFFER_IS_TRACED)
156 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
157 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
158 t0->flags = b0->flags;
159 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
167 static_always_inline void
168 vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b)
170 vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4,
171 b->flags & VNET_BUFFER_F_IS_IP6);
174 static_always_inline uword
175 vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index,
176 vlib_combined_counter_main_t *ccm,
177 vlib_buffer_t **b, u32 config_index, u8 arc,
178 u32 n_left, int processing_level)
181 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
182 u32 ti = vm->thread_index;
188 /* Prefetch next iteration. */
189 vlib_prefetch_buffer_header (b[4], LOAD);
190 vlib_prefetch_buffer_header (b[5], LOAD);
191 vlib_prefetch_buffer_header (b[6], LOAD);
192 vlib_prefetch_buffer_header (b[7], LOAD);
194 if (processing_level >= 1)
195 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
197 /* Be grumpy about zero length buffers for benefit of
198 driver tx function. */
199 ASSERT (b[0]->current_length > 0);
200 ASSERT (b[1]->current_length > 0);
201 ASSERT (b[2]->current_length > 0);
202 ASSERT (b[3]->current_length > 0);
204 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
205 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
206 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
207 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
209 if (processing_level >= 2)
211 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
212 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
213 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
214 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
215 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
217 /* update vlan subif tx counts, if required */
218 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
219 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
221 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
222 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
224 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
225 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
227 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
228 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
230 if (PREDICT_FALSE (config_index != ~0))
232 vnet_buffer (b[0])->feature_arc_index = arc;
233 b[0]->current_config_index = config_index;
234 vnet_buffer (b[1])->feature_arc_index = arc;
235 b[1]->current_config_index = config_index;
236 vnet_buffer (b[2])->feature_arc_index = arc;
237 b[2]->current_config_index = config_index;
238 vnet_buffer (b[3])->feature_arc_index = arc;
239 b[3]->current_config_index = config_index;
243 if (processing_level >= 1 && (or_flags & VNET_BUFFER_F_OFFLOAD))
245 vnet_interface_output_handle_offload (vm, b[0]);
246 vnet_interface_output_handle_offload (vm, b[1]);
247 vnet_interface_output_handle_offload (vm, b[2]);
248 vnet_interface_output_handle_offload (vm, b[3]);
257 /* Be grumpy about zero length buffers for benefit of
258 driver tx function. */
259 ASSERT (b[0]->current_length > 0);
261 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
263 if (processing_level >= 2)
265 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
267 if (PREDICT_FALSE (config_index != ~0))
269 vnet_buffer (b[0])->feature_arc_index = arc;
270 b[0]->current_config_index = config_index;
273 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
274 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
277 if (processing_level >= 1)
278 vnet_interface_output_handle_offload (vm, b[0]);
287 static_always_inline void
288 vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
289 vlib_frame_t *frame, int in_interface_ouput)
291 vnet_main_t *vnm = vnet_get_main ();
292 u32 n_left_from, *from;
293 u32 sw_if_index = ~0, hw_if_index = ~0;
294 vnet_pcap_t *pp = &vnm->pcap;
296 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
299 if (in_interface_ouput)
301 /* interface-output is called right before interface-output-template.
302 * We only want to capture packets here if there is a per-interface
303 * filter, in case it matches the sub-interface sw_if_index.
304 * If there is no per-interface filter configured, let the
305 * interface-output-template node deal with it */
306 if (pp->pcap_sw_if_index == 0)
311 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
312 sw_if_index = rt->sw_if_index;
315 n_left_from = frame->n_vectors;
316 from = vlib_frame_vector_args (frame);
318 while (n_left_from > 0)
321 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
325 if (in_interface_ouput)
327 const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX];
328 if (PREDICT_FALSE (sii != sw_if_index))
330 const vnet_hw_interface_t *hi =
331 vnet_get_sup_hw_interface (vnm, sii);
332 hw_if_index = hi->sw_if_index;
335 if (hw_if_index == sw_if_index)
336 continue; /* defer to interface-output-template */
339 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
340 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
344 static_always_inline void
345 store_tx_frame_scalar_data (vnet_hw_if_output_node_runtime_t *r,
346 vnet_hw_if_tx_frame_t *tf)
349 clib_memcpy_fast (tf, &r->frame, sizeof (vnet_hw_if_tx_frame_t));
352 static_always_inline void
353 enqueu_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
354 vnet_hw_interface_t *hi, u32 *from, u32 n_vectors)
356 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
357 vnet_hw_if_output_node_runtime_t *r = 0;
358 u32 n_free, n_copy, *to;
359 vnet_hw_if_tx_frame_t *tf;
362 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
364 if (hi->output_node_thread_runtimes)
365 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
367 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
368 tf = vlib_frame_scalar_args (f);
370 if (f->n_vectors > 0 && (r == 0 || tf->queue_id == r->frame.queue_id))
372 /* append current next frame */
373 n_free = VLIB_FRAME_SIZE - f->n_vectors;
374 n_copy = clib_min (n_vectors, n_free);
376 to = vlib_frame_vector_args (f);
381 if (f->n_vectors > 0)
383 /* current frame doesn't fit - grab empty one */
384 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
385 tf = vlib_frame_scalar_args (f);
388 /* empty frame - store scalar data */
389 store_tx_frame_scalar_data (r, tf);
390 to = vlib_frame_vector_args (f);
391 n_free = VLIB_FRAME_SIZE;
396 vlib_buffer_copy_indices (to, from, n_copy);
397 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
402 /* we have more indices to store, take empty frame */
404 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
405 store_tx_frame_scalar_data (r, vlib_frame_scalar_args (f));
406 vlib_buffer_copy_indices (vlib_frame_vector_args (f), from, n_vectors);
407 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_vectors);
410 VLIB_NODE_FN (vnet_interface_output_node)
411 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
413 vnet_main_t *vnm = vnet_get_main ();
414 vnet_interface_main_t *im = &vnm->interface_main;
415 vlib_combined_counter_main_t *ccm;
416 vnet_hw_interface_t *hi;
417 vnet_sw_interface_t *si;
418 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
419 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
420 u32 n_bytes, n_buffers = frame->n_vectors;
421 u32 config_index = ~0;
422 u32 sw_if_index = rt->sw_if_index;
423 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
424 u32 ti = vm->thread_index;
425 u8 arc = im->output_feature_arc_index;
426 int arc_or_subif = 0;
427 int do_tx_offloads = 0;
430 if (node->flags & VLIB_NODE_FLAG_TRACE)
431 vnet_interface_output_trace (vm, node, frame, n_buffers);
433 from = vlib_frame_vector_args (frame);
436 return vlib_error_drop_buffers (
438 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
439 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
441 vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */);
443 vlib_get_buffers (vm, from, bufs, n_buffers);
445 si = vnet_get_sw_interface (vnm, sw_if_index);
446 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
448 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
449 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
451 vlib_simple_counter_main_t *cm;
453 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
454 VNET_INTERFACE_COUNTER_TX_ERROR);
455 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
457 return vlib_error_drop_buffers (
459 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
460 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
463 /* interface-output feature arc handling */
464 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
466 vnet_feature_config_main_t *fcm;
467 fcm = vnet_feature_get_config_main (arc);
468 config_index = vnet_get_feature_config_index (arc, sw_if_index);
469 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
472 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
475 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
477 /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
478 * here before sending to the interface */
479 if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) !=
480 VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM)
483 if (do_tx_offloads == 0 && arc_or_subif == 0)
484 n_bytes = vnet_interface_output_node_inline (
485 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0);
486 else if (do_tx_offloads == 1 && arc_or_subif == 0)
487 n_bytes = vnet_interface_output_node_inline (
488 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1);
490 n_bytes = vnet_interface_output_node_inline (
491 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 2);
493 from = vlib_frame_vector_args (frame);
494 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
496 enqueu_to_tx_node (vm, node, hi, from, frame->n_vectors);
500 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
504 /* Update main interface stats. */
505 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
509 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
510 .name = "interface-output-template",
511 .vector_size = sizeof (u32),
514 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
515 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
516 vlib_node_runtime_t *
518 vlib_frame_t * frame)
520 vnet_main_t *vnm = vnet_get_main ();
521 u32 n_left_to_next, *from, *to_next;
522 u32 n_left_from, next_index;
524 vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* in_interface_ouput */);
526 n_left_from = frame->n_vectors;
528 from = vlib_frame_vector_args (frame);
529 next_index = node->cached_next_index;
531 while (n_left_from > 0)
533 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
535 while (n_left_from >= 4 && n_left_to_next >= 2)
537 u32 bi0, bi1, next0, next1;
538 vlib_buffer_t *b0, *b1;
539 vnet_hw_interface_t *hi0, *hi1;
541 /* Prefetch next iteration. */
542 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
543 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
554 b0 = vlib_get_buffer (vm, bi0);
555 b1 = vlib_get_buffer (vm, bi1);
558 vnet_get_sup_hw_interface (vnm,
559 vnet_buffer (b0)->sw_if_index
562 vnet_get_sup_hw_interface (vnm,
563 vnet_buffer (b1)->sw_if_index
566 next0 = hi0->output_node_next_index;
567 next1 = hi1->output_node_next_index;
569 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
570 n_left_to_next, bi0, bi1, next0,
574 while (n_left_from > 0 && n_left_to_next > 0)
578 vnet_hw_interface_t *hi0;
587 b0 = vlib_get_buffer (vm, bi0);
590 vnet_get_sup_hw_interface (vnm,
591 vnet_buffer (b0)->sw_if_index
594 next0 = hi0->output_node_next_index;
596 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
597 n_left_to_next, bi0, next0);
600 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
603 return frame->n_vectors;
606 typedef struct vnet_error_trace_t_
613 ip46_address_t src, dst;
614 } vnet_error_trace_t;
617 format_vnet_error_trace (u8 * s, va_list * va)
619 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
620 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
621 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
623 /* Normal, non-catchup trace */
624 if (t->details_valid == 0)
626 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
627 vnet_get_main (), t->sw_if_index);
629 else if (t->details_valid == 1)
631 /* The trace capture code didn't understant the mactype */
632 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
634 else if (t->details_valid == 2)
636 /* Dump the src/dst addresses */
638 s = format (s, "IP4: %U -> %U",
639 format_ip4_address, &t->src.ip4,
640 format_ip4_address, &t->dst.ip4);
642 s = format (s, "IP6: %U -> %U",
643 format_ip6_address, &t->src.ip6,
644 format_ip6_address, &t->dst.ip6);
650 interface_trace_buffers (vlib_main_t * vm,
651 vlib_node_runtime_t * node, vlib_frame_t * frame)
653 u32 n_left, *buffers;
655 buffers = vlib_frame_vector_args (frame);
656 n_left = frame->n_vectors;
661 vlib_buffer_t *b0, *b1;
662 vnet_error_trace_t *t0, *t1;
664 /* Prefetch next iteration. */
665 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
666 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
671 b0 = vlib_get_buffer (vm, bi0);
672 b1 = vlib_get_buffer (vm, bi1);
674 if (b0->flags & VLIB_BUFFER_IS_TRACED)
676 t0 = vlib_add_trace (vm, node, b0,
677 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
678 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
679 t0->details_valid = 0;
681 if (b1->flags & VLIB_BUFFER_IS_TRACED)
683 t1 = vlib_add_trace (vm, node, b1,
684 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
685 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
686 t1->details_valid = 0;
696 vnet_error_trace_t *t0;
700 b0 = vlib_get_buffer (vm, bi0);
702 if (b0->flags & VLIB_BUFFER_IS_TRACED)
704 t0 = vlib_add_trace (vm, node, b0,
705 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
706 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
707 t0->details_valid = 0;
716 VNET_ERROR_DISPOSITION_DROP,
717 VNET_ERROR_DISPOSITION_PUNT,
718 VNET_ERROR_N_DISPOSITION,
719 } vnet_error_disposition_t;
722 drop_catchup_trace (vlib_main_t * vm,
723 vlib_node_runtime_t * node, vlib_buffer_t * b)
725 /* Can we safely rewind the buffer? If not, fagedaboudit */
726 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
728 vnet_error_trace_t *t;
731 ethernet_header_t *eh;
734 t = vlib_add_trace (vm, node, b, sizeof (*t));
735 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
736 vlib_buffer_advance (b, delta);
738 eh = vlib_buffer_get_current (b);
740 t->mactype = clib_net_to_host_u16 (eh->type);
741 t->details_valid = 1;
744 case ETHERNET_TYPE_IP4:
745 ip4 = (void *) (eh + 1);
746 t->details_valid = 2;
748 t->src.ip4.as_u32 = ip4->src_address.as_u32;
749 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
752 case ETHERNET_TYPE_IP6:
753 ip6 = (void *) (eh + 1);
754 t->details_valid = 2;
756 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
757 sizeof (ip6_address_t));
758 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
759 sizeof (ip6_address_t));
763 /* Dunno, do nothing, leave details_valid alone */
766 /* Restore current data (probably unnecessary) */
767 vlib_buffer_advance (b, -delta);
771 static_always_inline uword
772 interface_drop_punt (vlib_main_t * vm,
773 vlib_node_runtime_t * node,
774 vlib_frame_t * frame,
775 vnet_error_disposition_t disposition)
777 u32 *from, n_left, thread_index, *sw_if_index;
778 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
779 u32 sw_if_indices[VLIB_FRAME_SIZE];
780 vlib_simple_counter_main_t *cm;
781 u16 nexts[VLIB_FRAME_SIZE];
785 vnm = vnet_get_main ();
786 thread_index = vm->thread_index;
787 from = vlib_frame_vector_args (frame);
788 n_left = frame->n_vectors;
790 sw_if_index = sw_if_indices;
792 vlib_get_buffers (vm, from, bufs, n_left);
794 /* "trace add error-drop NNN?" */
795 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
797 /* If pkts aren't otherwise traced... */
798 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
800 /* Trace them from here */
801 node->flags |= VLIB_NODE_FLAG_TRACE;
802 while (n_trace && n_left)
805 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
806 0 /* follow chain */ )))
809 * Here we have a wireshark dissector problem.
810 * Packets may be well-formed, or not. We
811 * must not blow chunks in any case.
813 * Try to produce trace records which will help
814 * folks understand what's going on.
816 drop_catchup_trace (vm, node, b[0]);
824 vlib_set_trace_count (vm, node, n_trace);
826 n_left = frame->n_vectors;
829 if (node->flags & VLIB_NODE_FLAG_TRACE)
830 interface_trace_buffers (vm, node, frame);
832 /* All going to drop regardless, this is just a counting exercise */
833 clib_memset (nexts, 0, sizeof (nexts));
835 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
836 (disposition == VNET_ERROR_DISPOSITION_PUNT
837 ? VNET_INTERFACE_COUNTER_PUNT
838 : VNET_INTERFACE_COUNTER_DROP));
840 /* collect the array of interfaces first ... */
845 /* Prefetch 8 ahead - there's not much going on in each iteration */
846 vlib_prefetch_buffer_header (b[4], LOAD);
847 vlib_prefetch_buffer_header (b[5], LOAD);
848 vlib_prefetch_buffer_header (b[6], LOAD);
849 vlib_prefetch_buffer_header (b[7], LOAD);
851 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
852 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
853 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
854 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
862 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
869 /* ... then count against them in blocks */
870 n_left = frame->n_vectors;
874 vnet_sw_interface_t *sw_if0;
877 off = frame->n_vectors - n_left;
879 sw_if_index = sw_if_indices + off;
881 count = clib_count_equal_u32 (sw_if_index, n_left);
884 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
886 /* Increment super-interface drop/punt counters for
888 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
889 if (sw_if0->sup_sw_if_index != sw_if_index[0])
890 vlib_increment_simple_counter
891 (cm, thread_index, sw_if0->sup_sw_if_index, count);
894 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
896 return frame->n_vectors;
900 pcap_drop_trace (vlib_main_t * vm,
901 vnet_interface_main_t * im,
902 vnet_pcap_t * pp, vlib_frame_t * f)
905 u32 n_left = f->n_vectors;
906 vlib_buffer_t *b0, *p1;
908 i16 save_current_data;
909 u16 save_current_length;
910 vlib_error_main_t *em = &vm->error_main;
912 from = vlib_frame_vector_args (f);
916 if (PREDICT_TRUE (n_left > 1))
918 p1 = vlib_get_buffer (vm, from[1]);
919 vlib_prefetch_buffer_header (p1, LOAD);
923 b0 = vlib_get_buffer (vm, bi0);
927 /* See if we're pointedly ignoring this specific error */
928 if (im->pcap_drop_filter_hash
929 && hash_get (im->pcap_drop_filter_hash, b0->error))
932 if (!vnet_is_packet_pcaped (pp, b0, ~0))
933 continue; /* not matching, skip */
935 /* Trace all drops, or drops received on a specific interface */
936 save_current_data = b0->current_data;
937 save_current_length = b0->current_length;
940 * Typically, we'll need to rewind the buffer
941 * if l2_hdr_offset is valid, make sure to rewind to the start of
942 * the L2 header. This may not be the buffer start in case we pop-ed
944 * Otherwise, rewind to buffer start and hope for the best.
946 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
948 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
949 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
952 else if (b0->current_data > 0)
954 vlib_buffer_advance (b0, (word) -b0->current_data);
958 vlib_buffer_t *last = b0;
959 u32 error_node_index;
962 /* Length of the error string */
963 int error_string_len =
964 clib_strnlen (em->counters_heap[b0->error].name, 128);
966 /* Dig up the drop node */
967 error_node_index = vm->node_main.node_by_error[b0->error];
968 n = vlib_get_node (vm, error_node_index);
970 /* Length of full drop string, w/ "nodename: " prepended */
971 drop_string_len = error_string_len + vec_len (n->name) + 2;
973 /* Find the last buffer in the chain */
974 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
975 last = vlib_get_buffer (vm, last->next_buffer);
978 * Append <nodename>: <error-string> to the capture,
979 * only if we can do that without allocating a new buffer.
981 if (PREDICT_TRUE ((last->current_data + last->current_length) <
982 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
984 clib_memcpy_fast (last->data + last->current_data +
985 last->current_length,
986 n->name, vec_len (n->name));
987 clib_memcpy_fast (last->data + last->current_data +
988 last->current_length + vec_len (n->name),
990 clib_memcpy_fast (last->data + last->current_data +
991 last->current_length + vec_len (n->name) + 2,
992 em->counters_heap[b0->error].name,
994 last->current_length += drop_string_len;
995 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
996 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
997 last->current_length -= drop_string_len;
998 b0->current_data = save_current_data;
999 b0->current_length = save_current_length;
1005 * Didn't have space in the last buffer, here's the dropped
1008 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1010 b0->current_data = save_current_data;
1011 b0->current_length = save_current_length;
1015 #ifndef CLIB_MARCH_VARIANT
1017 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1019 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1021 if (im->pcap_drop_filter_hash == 0)
1022 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1025 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1027 hash_unset (im->pcap_drop_filter_hash, error_index);
1029 #endif /* CLIB_MARCH_VARIANT */
1031 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1032 vlib_node_runtime_t * node,
1033 vlib_frame_t * frame)
1035 vnet_main_t *vnm = vnet_get_main ();
1036 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1037 vnet_pcap_t *pp = &vnm->pcap;
1039 if (PREDICT_FALSE (pp->pcap_drop_enable))
1040 pcap_drop_trace (vm, im, pp, frame);
1042 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1045 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1046 vlib_node_runtime_t * node,
1047 vlib_frame_t * frame)
1049 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1053 VLIB_REGISTER_NODE (interface_drop) = {
1054 .name = "error-drop",
1055 .vector_size = sizeof (u32),
1056 .format_trace = format_vnet_error_trace,
1057 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1066 VLIB_REGISTER_NODE (interface_punt) = {
1067 .name = "error-punt",
1068 .vector_size = sizeof (u32),
1069 .format_trace = format_vnet_error_trace,
1070 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1078 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1079 .name = "interface-output",
1080 .vector_size = sizeof (u32),
1083 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1084 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1086 vnet_main_t *vnm = vnet_get_main ();
1087 vnet_interface_main_t *im = &vnm->interface_main;
1088 vnet_hw_if_output_node_runtime_t *r = 0;
1089 vnet_hw_interface_t *hi;
1090 vnet_hw_if_tx_frame_t *tf;
1091 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1092 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1093 u64 used_elts[VLIB_FRAME_SIZE / 64] = {};
1094 u64 mask[VLIB_FRAME_SIZE / 64] = {};
1095 u32 *tmp, *from, n_left, n_free, n_comp, *to, swif, off;
1099 from = vlib_frame_vector_args (frame);
1100 n_left = frame->n_vectors;
1101 vlib_get_buffers (vm, from, bufs, n_left);
1105 vlib_prefetch_buffer_header (b[4], LOAD);
1106 vlib_prefetch_buffer_header (b[5], LOAD);
1107 vlib_prefetch_buffer_header (b[6], LOAD);
1108 vlib_prefetch_buffer_header (b[7], LOAD);
1109 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1110 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1111 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1112 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1121 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1127 n_left = frame->n_vectors;
1128 swif = sw_if_indices[0];
1131 /* a bit ugly but it allows us to reuse stack space for temporary store
1132 * which may also improve memory latency */
1136 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1137 hi = vnet_get_sup_hw_interface (vnm, swif);
1138 if (hi->output_node_thread_runtimes)
1139 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1140 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
1141 tf = vlib_frame_scalar_args (f);
1143 if (f->n_vectors > 0 && (r == 0 || r->frame.queue_id == tf->queue_id))
1146 n_free = VLIB_FRAME_SIZE - f->n_vectors;
1147 if (n_free >= f->n_vectors)
1148 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1154 if (f->n_vectors > 0)
1156 /* current frame doesn't fit - grab empty one */
1157 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1158 tf = vlib_frame_scalar_args (f);
1161 /* empty frame - store scalar data */
1162 store_tx_frame_scalar_data (r, tf);
1163 n_free = VLIB_FRAME_SIZE;
1164 to = vlib_frame_vector_args (f);
1167 /* compare and compress based on comparison mask */
1168 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1169 n_comp = clib_compress_u32 (to, from, mask, frame->n_vectors);
1173 /* indices already written to frame, just close it */
1174 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1176 else if (n_free >= n_comp)
1178 /* enough space in the existing frame */
1179 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1180 vlib_buffer_copy_indices (to, tmp, n_comp);
1181 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1186 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1187 vlib_buffer_copy_indices (to, tmp, n_free);
1188 vlib_put_next_frame (vm, node, next_index, 0);
1191 u32 n_frame2 = n_comp - n_free;
1192 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1193 to = vlib_frame_vector_args (f);
1194 vlib_buffer_copy_indices (to, tmp + n_free, n_frame2);
1195 tf = vlib_frame_scalar_args (f);
1196 store_tx_frame_scalar_data (r, tf);
1197 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_frame2);
1203 /* store comparison mask so we can find next unused element */
1204 for (int i = 0; i < ARRAY_LEN (used_elts); i++)
1205 used_elts[i] |= mask[i];
1207 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1208 while (PREDICT_FALSE (used_elts[off] == ~0))
1212 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1216 return frame->n_vectors;
1219 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1220 .name = "interface-output-arc-end",
1221 .vector_size = sizeof (u32),
1228 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1229 .arc_name = "interface-output",
1230 .start_nodes = VNET_FEATURES (0),
1231 .last_in_arc = "interface-output-arc-end",
1232 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1235 VNET_FEATURE_INIT (span_tx, static) = {
1236 .arc_name = "interface-output",
1237 .node_name = "span-output",
1238 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1241 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1242 .arc_name = "interface-output",
1243 .node_name = "ipsec-if-output",
1244 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1247 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1248 .arc_name = "interface-output",
1249 .node_name = "interface-output-arc-end",
1253 #ifndef CLIB_MARCH_VARIANT
1255 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1259 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1262 if (hi->output_node_index == 0)
1265 next_index = vlib_node_add_next
1266 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1267 hi->output_node_index);
1268 hi->output_node_next_index = next_index;
1273 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1274 (vnet_per_buffer_interface_output_hw_interface_add_del);
1277 vnet_set_interface_output_node (vnet_main_t * vnm,
1278 u32 hw_if_index, u32 node_index)
1280 ASSERT (node_index);
1281 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1282 u32 next_index = vlib_node_add_next
1283 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1284 hi->output_node_next_index = next_index;
1285 hi->output_node_index = node_index;
1287 #endif /* CLIB_MARCH_VARIANT */
1290 * fd.io coding-style-patch-verification: ON
1293 * eval: (c-set-style "gnu")