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 do_tx_offloads,
182 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
183 u32 ti = vm->thread_index;
189 /* Prefetch next iteration. */
190 vlib_prefetch_buffer_header (b[4], LOAD);
191 vlib_prefetch_buffer_header (b[5], LOAD);
192 vlib_prefetch_buffer_header (b[6], LOAD);
193 vlib_prefetch_buffer_header (b[7], LOAD);
196 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
198 /* Be grumpy about zero length buffers for benefit of
199 driver tx function. */
200 ASSERT (b[0]->current_length > 0);
201 ASSERT (b[1]->current_length > 0);
202 ASSERT (b[2]->current_length > 0);
203 ASSERT (b[3]->current_length > 0);
205 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
206 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
207 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
208 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
212 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
213 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
214 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
215 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
216 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
218 /* update vlan subif tx counts, if required */
219 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
220 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
222 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
223 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
225 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
226 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
228 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
229 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
231 if (PREDICT_FALSE (config_index != ~0))
233 vnet_buffer (b[0])->feature_arc_index = arc;
234 b[0]->current_config_index = config_index;
235 vnet_buffer (b[1])->feature_arc_index = arc;
236 b[1]->current_config_index = config_index;
237 vnet_buffer (b[2])->feature_arc_index = arc;
238 b[2]->current_config_index = config_index;
239 vnet_buffer (b[3])->feature_arc_index = arc;
240 b[3]->current_config_index = config_index;
244 if (do_tx_offloads && (or_flags & VNET_BUFFER_F_OFFLOAD))
246 vnet_interface_output_handle_offload (vm, b[0]);
247 vnet_interface_output_handle_offload (vm, b[1]);
248 vnet_interface_output_handle_offload (vm, b[2]);
249 vnet_interface_output_handle_offload (vm, b[3]);
258 /* Be grumpy about zero length buffers for benefit of
259 driver tx function. */
260 ASSERT (b[0]->current_length > 0);
262 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
266 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
268 if (PREDICT_FALSE (config_index != ~0))
270 vnet_buffer (b[0])->feature_arc_index = arc;
271 b[0]->current_config_index = config_index;
274 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
275 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
279 vnet_interface_output_handle_offload (vm, b[0]);
288 static_always_inline void
289 vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
290 vlib_frame_t *frame, int in_interface_ouput)
292 vnet_main_t *vnm = vnet_get_main ();
293 u32 n_left_from, *from;
294 u32 sw_if_index = ~0, hw_if_index = ~0;
295 vnet_pcap_t *pp = &vnm->pcap;
297 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
300 if (in_interface_ouput)
302 /* interface-output is called right before interface-output-template.
303 * We only want to capture packets here if there is a per-interface
304 * filter, in case it matches the sub-interface sw_if_index.
305 * If there is no per-interface filter configured, let the
306 * interface-output-template node deal with it */
307 if (pp->pcap_sw_if_index == 0)
312 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
313 sw_if_index = rt->sw_if_index;
316 n_left_from = frame->n_vectors;
317 from = vlib_frame_vector_args (frame);
319 while (n_left_from > 0)
322 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
326 if (in_interface_ouput)
328 const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX];
329 if (PREDICT_FALSE (sii != sw_if_index))
331 const vnet_hw_interface_t *hi =
332 vnet_get_sup_hw_interface (vnm, sii);
333 hw_if_index = hi->sw_if_index;
336 if (hw_if_index == sw_if_index)
337 continue; /* defer to interface-output-template */
340 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
341 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
345 static_always_inline void
346 store_tx_frame_scalar_data (vnet_hw_if_output_node_runtime_t *r,
347 vnet_hw_if_tx_frame_t *tf)
350 clib_memcpy_fast (tf, &r->frame, sizeof (vnet_hw_if_tx_frame_t));
353 static_always_inline void
354 enqueu_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
355 vnet_hw_interface_t *hi, u32 *from, u32 n_vectors)
357 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
358 vnet_hw_if_output_node_runtime_t *r = 0;
359 u32 n_free, n_copy, *to;
360 vnet_hw_if_tx_frame_t *tf;
363 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
365 if (hi->output_node_thread_runtimes)
366 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
368 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
369 tf = vlib_frame_scalar_args (f);
371 if (f->n_vectors > 0 && (r == 0 || tf->queue_id == r->frame.queue_id))
373 /* append current next frame */
374 n_free = VLIB_FRAME_SIZE - f->n_vectors;
375 n_copy = clib_min (n_vectors, n_free);
377 to = vlib_frame_vector_args (f);
382 if (f->n_vectors > 0)
384 /* current frame doesn't fit - grab empty one */
385 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
386 tf = vlib_frame_scalar_args (f);
389 /* empty frame - store scalar data */
390 store_tx_frame_scalar_data (r, tf);
391 to = vlib_frame_vector_args (f);
392 n_free = VLIB_FRAME_SIZE;
397 vlib_buffer_copy_indices (to, from, n_copy);
398 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
403 /* we have more indices to store, take empty frame */
405 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
406 store_tx_frame_scalar_data (r, vlib_frame_scalar_args (f));
407 vlib_buffer_copy_indices (vlib_frame_vector_args (f), from, n_vectors);
408 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_vectors);
411 VLIB_NODE_FN (vnet_interface_output_node)
412 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
414 vnet_main_t *vnm = vnet_get_main ();
415 vnet_interface_main_t *im = &vnm->interface_main;
416 vlib_combined_counter_main_t *ccm;
417 vnet_hw_interface_t *hi;
418 vnet_sw_interface_t *si;
419 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
420 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
421 u32 n_bytes, n_buffers = frame->n_vectors;
422 u32 config_index = ~0;
423 u32 sw_if_index = rt->sw_if_index;
424 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
425 u32 ti = vm->thread_index;
426 u8 arc = im->output_feature_arc_index;
427 int arc_or_subif = 0;
428 int do_tx_offloads = 0;
431 if (node->flags & VLIB_NODE_FLAG_TRACE)
432 vnet_interface_output_trace (vm, node, frame, n_buffers);
434 from = vlib_frame_vector_args (frame);
437 return vlib_error_drop_buffers (
439 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
440 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
442 vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */);
444 vlib_get_buffers (vm, from, bufs, n_buffers);
446 si = vnet_get_sw_interface (vnm, sw_if_index);
447 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
449 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
450 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
452 vlib_simple_counter_main_t *cm;
454 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
455 VNET_INTERFACE_COUNTER_TX_ERROR);
456 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
458 return vlib_error_drop_buffers (
460 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
461 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
464 /* interface-output feature arc handling */
465 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
467 vnet_feature_config_main_t *fcm;
468 fcm = vnet_feature_get_config_main (arc);
469 config_index = vnet_get_feature_config_index (arc, sw_if_index);
470 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
473 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
476 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
478 /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
479 * here before sending to the interface */
480 if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) !=
481 VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM)
484 if (do_tx_offloads == 0 && arc_or_subif == 0)
485 n_bytes = vnet_interface_output_node_inline (
486 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0, 0);
487 else if (do_tx_offloads == 0 && arc_or_subif == 1)
488 n_bytes = vnet_interface_output_node_inline (
489 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0, 1);
490 else if (do_tx_offloads == 1 && arc_or_subif == 0)
491 n_bytes = vnet_interface_output_node_inline (
492 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1, 0);
494 n_bytes = vnet_interface_output_node_inline (
495 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1, 1);
497 from = vlib_frame_vector_args (frame);
498 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
500 enqueu_to_tx_node (vm, node, hi, from, frame->n_vectors);
504 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
508 /* Update main interface stats. */
509 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
513 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
514 .name = "interface-output-template",
515 .vector_size = sizeof (u32),
518 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
519 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
520 vlib_node_runtime_t *
522 vlib_frame_t * frame)
524 vnet_main_t *vnm = vnet_get_main ();
525 u32 n_left_to_next, *from, *to_next;
526 u32 n_left_from, next_index;
528 vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* in_interface_ouput */);
530 n_left_from = frame->n_vectors;
532 from = vlib_frame_vector_args (frame);
533 next_index = node->cached_next_index;
535 while (n_left_from > 0)
537 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
539 while (n_left_from >= 4 && n_left_to_next >= 2)
541 u32 bi0, bi1, next0, next1;
542 vlib_buffer_t *b0, *b1;
543 vnet_hw_interface_t *hi0, *hi1;
545 /* Prefetch next iteration. */
546 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
547 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
558 b0 = vlib_get_buffer (vm, bi0);
559 b1 = vlib_get_buffer (vm, bi1);
562 vnet_get_sup_hw_interface (vnm,
563 vnet_buffer (b0)->sw_if_index
566 vnet_get_sup_hw_interface (vnm,
567 vnet_buffer (b1)->sw_if_index
570 next0 = hi0->output_node_next_index;
571 next1 = hi1->output_node_next_index;
573 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
574 n_left_to_next, bi0, bi1, next0,
578 while (n_left_from > 0 && n_left_to_next > 0)
582 vnet_hw_interface_t *hi0;
591 b0 = vlib_get_buffer (vm, bi0);
594 vnet_get_sup_hw_interface (vnm,
595 vnet_buffer (b0)->sw_if_index
598 next0 = hi0->output_node_next_index;
600 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
601 n_left_to_next, bi0, next0);
604 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
607 return frame->n_vectors;
610 typedef struct vnet_error_trace_t_
617 ip46_address_t src, dst;
618 } vnet_error_trace_t;
621 format_vnet_error_trace (u8 * s, va_list * va)
623 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
624 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
625 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
627 /* Normal, non-catchup trace */
628 if (t->details_valid == 0)
630 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
631 vnet_get_main (), t->sw_if_index);
633 else if (t->details_valid == 1)
635 /* The trace capture code didn't understant the mactype */
636 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
638 else if (t->details_valid == 2)
640 /* Dump the src/dst addresses */
642 s = format (s, "IP4: %U -> %U",
643 format_ip4_address, &t->src.ip4,
644 format_ip4_address, &t->dst.ip4);
646 s = format (s, "IP6: %U -> %U",
647 format_ip6_address, &t->src.ip6,
648 format_ip6_address, &t->dst.ip6);
654 interface_trace_buffers (vlib_main_t * vm,
655 vlib_node_runtime_t * node, vlib_frame_t * frame)
657 u32 n_left, *buffers;
659 buffers = vlib_frame_vector_args (frame);
660 n_left = frame->n_vectors;
665 vlib_buffer_t *b0, *b1;
666 vnet_error_trace_t *t0, *t1;
668 /* Prefetch next iteration. */
669 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
670 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
675 b0 = vlib_get_buffer (vm, bi0);
676 b1 = vlib_get_buffer (vm, bi1);
678 if (b0->flags & VLIB_BUFFER_IS_TRACED)
680 t0 = vlib_add_trace (vm, node, b0,
681 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
682 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
683 t0->details_valid = 0;
685 if (b1->flags & VLIB_BUFFER_IS_TRACED)
687 t1 = vlib_add_trace (vm, node, b1,
688 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
689 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
690 t1->details_valid = 0;
700 vnet_error_trace_t *t0;
704 b0 = vlib_get_buffer (vm, bi0);
706 if (b0->flags & VLIB_BUFFER_IS_TRACED)
708 t0 = vlib_add_trace (vm, node, b0,
709 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
710 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
711 t0->details_valid = 0;
720 VNET_ERROR_DISPOSITION_DROP,
721 VNET_ERROR_DISPOSITION_PUNT,
722 VNET_ERROR_N_DISPOSITION,
723 } vnet_error_disposition_t;
726 drop_catchup_trace (vlib_main_t * vm,
727 vlib_node_runtime_t * node, vlib_buffer_t * b)
729 /* Can we safely rewind the buffer? If not, fagedaboudit */
730 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
732 vnet_error_trace_t *t;
735 ethernet_header_t *eh;
738 t = vlib_add_trace (vm, node, b, sizeof (*t));
739 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
740 vlib_buffer_advance (b, delta);
742 eh = vlib_buffer_get_current (b);
744 t->mactype = clib_net_to_host_u16 (eh->type);
745 t->details_valid = 1;
748 case ETHERNET_TYPE_IP4:
749 ip4 = (void *) (eh + 1);
750 t->details_valid = 2;
752 t->src.ip4.as_u32 = ip4->src_address.as_u32;
753 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
756 case ETHERNET_TYPE_IP6:
757 ip6 = (void *) (eh + 1);
758 t->details_valid = 2;
760 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
761 sizeof (ip6_address_t));
762 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
763 sizeof (ip6_address_t));
767 /* Dunno, do nothing, leave details_valid alone */
770 /* Restore current data (probably unnecessary) */
771 vlib_buffer_advance (b, -delta);
775 static_always_inline uword
776 interface_drop_punt (vlib_main_t * vm,
777 vlib_node_runtime_t * node,
778 vlib_frame_t * frame,
779 vnet_error_disposition_t disposition)
781 u32 *from, n_left, thread_index, *sw_if_index;
782 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
783 u32 sw_if_indices[VLIB_FRAME_SIZE];
784 vlib_simple_counter_main_t *cm;
785 u16 nexts[VLIB_FRAME_SIZE];
789 vnm = vnet_get_main ();
790 thread_index = vm->thread_index;
791 from = vlib_frame_vector_args (frame);
792 n_left = frame->n_vectors;
794 sw_if_index = sw_if_indices;
796 vlib_get_buffers (vm, from, bufs, n_left);
798 /* "trace add error-drop NNN?" */
799 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
801 /* If pkts aren't otherwise traced... */
802 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
804 /* Trace them from here */
805 node->flags |= VLIB_NODE_FLAG_TRACE;
806 while (n_trace && n_left)
809 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
810 0 /* follow chain */ )))
813 * Here we have a wireshark dissector problem.
814 * Packets may be well-formed, or not. We
815 * must not blow chunks in any case.
817 * Try to produce trace records which will help
818 * folks understand what's going on.
820 drop_catchup_trace (vm, node, b[0]);
828 vlib_set_trace_count (vm, node, n_trace);
830 n_left = frame->n_vectors;
833 if (node->flags & VLIB_NODE_FLAG_TRACE)
834 interface_trace_buffers (vm, node, frame);
836 /* All going to drop regardless, this is just a counting exercise */
837 clib_memset (nexts, 0, sizeof (nexts));
839 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
840 (disposition == VNET_ERROR_DISPOSITION_PUNT
841 ? VNET_INTERFACE_COUNTER_PUNT
842 : VNET_INTERFACE_COUNTER_DROP));
844 /* collect the array of interfaces first ... */
849 /* Prefetch 8 ahead - there's not much going on in each iteration */
850 vlib_prefetch_buffer_header (b[4], LOAD);
851 vlib_prefetch_buffer_header (b[5], LOAD);
852 vlib_prefetch_buffer_header (b[6], LOAD);
853 vlib_prefetch_buffer_header (b[7], LOAD);
855 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
856 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
857 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
858 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
866 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
873 /* ... then count against them in blocks */
874 n_left = frame->n_vectors;
878 vnet_sw_interface_t *sw_if0;
881 off = frame->n_vectors - n_left;
883 sw_if_index = sw_if_indices + off;
885 count = clib_count_equal_u32 (sw_if_index, n_left);
888 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
890 /* Increment super-interface drop/punt counters for
892 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
893 if (sw_if0->sup_sw_if_index != sw_if_index[0])
894 vlib_increment_simple_counter
895 (cm, thread_index, sw_if0->sup_sw_if_index, count);
898 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
900 return frame->n_vectors;
904 pcap_drop_trace (vlib_main_t * vm,
905 vnet_interface_main_t * im,
906 vnet_pcap_t * pp, vlib_frame_t * f)
909 u32 n_left = f->n_vectors;
910 vlib_buffer_t *b0, *p1;
912 i16 save_current_data;
913 u16 save_current_length;
914 vlib_error_main_t *em = &vm->error_main;
916 from = vlib_frame_vector_args (f);
920 if (PREDICT_TRUE (n_left > 1))
922 p1 = vlib_get_buffer (vm, from[1]);
923 vlib_prefetch_buffer_header (p1, LOAD);
927 b0 = vlib_get_buffer (vm, bi0);
931 /* See if we're pointedly ignoring this specific error */
932 if (im->pcap_drop_filter_hash
933 && hash_get (im->pcap_drop_filter_hash, b0->error))
936 if (!vnet_is_packet_pcaped (pp, b0, ~0))
937 continue; /* not matching, skip */
939 /* Trace all drops, or drops received on a specific interface */
940 save_current_data = b0->current_data;
941 save_current_length = b0->current_length;
944 * Typically, we'll need to rewind the buffer
945 * if l2_hdr_offset is valid, make sure to rewind to the start of
946 * the L2 header. This may not be the buffer start in case we pop-ed
948 * Otherwise, rewind to buffer start and hope for the best.
950 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
952 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
953 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
956 else if (b0->current_data > 0)
958 vlib_buffer_advance (b0, (word) -b0->current_data);
962 vlib_buffer_t *last = b0;
963 u32 error_node_index;
966 /* Length of the error string */
967 int error_string_len =
968 clib_strnlen (em->counters_heap[b0->error].name, 128);
970 /* Dig up the drop node */
971 error_node_index = vm->node_main.node_by_error[b0->error];
972 n = vlib_get_node (vm, error_node_index);
974 /* Length of full drop string, w/ "nodename: " prepended */
975 drop_string_len = error_string_len + vec_len (n->name) + 2;
977 /* Find the last buffer in the chain */
978 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
979 last = vlib_get_buffer (vm, last->next_buffer);
982 * Append <nodename>: <error-string> to the capture,
983 * only if we can do that without allocating a new buffer.
985 if (PREDICT_TRUE ((last->current_data + last->current_length) <
986 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
988 clib_memcpy_fast (last->data + last->current_data +
989 last->current_length,
990 n->name, vec_len (n->name));
991 clib_memcpy_fast (last->data + last->current_data +
992 last->current_length + vec_len (n->name),
994 clib_memcpy_fast (last->data + last->current_data +
995 last->current_length + vec_len (n->name) + 2,
996 em->counters_heap[b0->error].name,
998 last->current_length += drop_string_len;
999 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1000 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1001 last->current_length -= drop_string_len;
1002 b0->current_data = save_current_data;
1003 b0->current_length = save_current_length;
1009 * Didn't have space in the last buffer, here's the dropped
1012 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1014 b0->current_data = save_current_data;
1015 b0->current_length = save_current_length;
1019 #ifndef CLIB_MARCH_VARIANT
1021 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1023 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1025 if (im->pcap_drop_filter_hash == 0)
1026 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1029 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1031 hash_unset (im->pcap_drop_filter_hash, error_index);
1033 #endif /* CLIB_MARCH_VARIANT */
1035 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1036 vlib_node_runtime_t * node,
1037 vlib_frame_t * frame)
1039 vnet_main_t *vnm = vnet_get_main ();
1040 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1041 vnet_pcap_t *pp = &vnm->pcap;
1043 if (PREDICT_FALSE (pp->pcap_drop_enable))
1044 pcap_drop_trace (vm, im, pp, frame);
1046 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1049 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1050 vlib_node_runtime_t * node,
1051 vlib_frame_t * frame)
1053 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1057 VLIB_REGISTER_NODE (interface_drop) = {
1058 .name = "error-drop",
1059 .vector_size = sizeof (u32),
1060 .format_trace = format_vnet_error_trace,
1061 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1070 VLIB_REGISTER_NODE (interface_punt) = {
1071 .name = "error-punt",
1072 .vector_size = sizeof (u32),
1073 .format_trace = format_vnet_error_trace,
1074 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1082 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1083 .name = "interface-output",
1084 .vector_size = sizeof (u32),
1087 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1088 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1090 vnet_main_t *vnm = vnet_get_main ();
1091 vnet_interface_main_t *im = &vnm->interface_main;
1092 vnet_hw_if_output_node_runtime_t *r = 0;
1093 vnet_hw_interface_t *hi;
1094 vnet_hw_if_tx_frame_t *tf;
1095 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1096 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1097 u64 used_elts[VLIB_FRAME_SIZE / 64] = {};
1098 u64 mask[VLIB_FRAME_SIZE / 64] = {};
1099 u32 *tmp, *from, n_left, n_free, n_comp, *to, swif, off;
1103 from = vlib_frame_vector_args (frame);
1104 n_left = frame->n_vectors;
1105 vlib_get_buffers (vm, from, bufs, n_left);
1109 vlib_prefetch_buffer_header (b[4], LOAD);
1110 vlib_prefetch_buffer_header (b[5], LOAD);
1111 vlib_prefetch_buffer_header (b[6], LOAD);
1112 vlib_prefetch_buffer_header (b[7], LOAD);
1113 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1114 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1115 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1116 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1125 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1131 n_left = frame->n_vectors;
1132 swif = sw_if_indices[0];
1135 /* a bit ugly but it allows us to reuse stack space for temporary store
1136 * which may also improve memory latency */
1140 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1141 hi = vnet_get_sup_hw_interface (vnm, swif);
1142 if (hi->output_node_thread_runtimes)
1143 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1144 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
1145 tf = vlib_frame_scalar_args (f);
1147 if (f->n_vectors > 0 && (r == 0 || r->frame.queue_id == tf->queue_id))
1150 n_free = VLIB_FRAME_SIZE - f->n_vectors;
1151 if (n_free >= f->n_vectors)
1152 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1158 if (f->n_vectors > 0)
1160 /* current frame doesn't fit - grab empty one */
1161 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1162 tf = vlib_frame_scalar_args (f);
1165 /* empty frame - store scalar data */
1166 store_tx_frame_scalar_data (r, tf);
1167 n_free = VLIB_FRAME_SIZE;
1168 to = vlib_frame_vector_args (f);
1171 /* compare and compress based on comparison mask */
1172 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1173 n_comp = clib_compress_u32 (to, from, mask, frame->n_vectors);
1177 /* indices already written to frame, just close it */
1178 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1180 else if (n_free >= n_comp)
1182 /* enough space in the existing frame */
1183 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1184 vlib_buffer_copy_indices (to, tmp, n_comp);
1185 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1190 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1191 vlib_buffer_copy_indices (to, tmp, n_free);
1192 vlib_put_next_frame (vm, node, next_index, 0);
1195 u32 n_frame2 = n_comp - n_free;
1196 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1197 to = vlib_frame_vector_args (f);
1198 vlib_buffer_copy_indices (to, tmp + n_free, n_frame2);
1199 tf = vlib_frame_scalar_args (f);
1200 store_tx_frame_scalar_data (r, tf);
1201 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_frame2);
1207 /* store comparison mask so we can find next unused element */
1208 for (int i = 0; i < ARRAY_LEN (used_elts); i++)
1209 used_elts[i] |= mask[i];
1211 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1212 while (PREDICT_FALSE (used_elts[off] == ~0))
1216 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1220 return frame->n_vectors;
1223 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1224 .name = "interface-output-arc-end",
1225 .vector_size = sizeof (u32),
1232 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1233 .arc_name = "interface-output",
1234 .start_nodes = VNET_FEATURES (0),
1235 .last_in_arc = "interface-output-arc-end",
1236 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1239 VNET_FEATURE_INIT (span_tx, static) = {
1240 .arc_name = "interface-output",
1241 .node_name = "span-output",
1242 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1245 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1246 .arc_name = "interface-output",
1247 .node_name = "ipsec-if-output",
1248 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1251 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1252 .arc_name = "interface-output",
1253 .node_name = "interface-output-arc-end",
1257 #ifndef CLIB_MARCH_VARIANT
1259 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1263 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1266 if (hi->output_node_index == 0)
1269 next_index = vlib_node_add_next
1270 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1271 hi->output_node_index);
1272 hi->output_node_next_index = next_index;
1277 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1278 (vnet_per_buffer_interface_output_hw_interface_add_del);
1281 vnet_set_interface_output_node (vnet_main_t * vnm,
1282 u32 hw_if_index, u32 node_index)
1284 ASSERT (node_index);
1285 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1286 u32 next_index = vlib_node_add_next
1287 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1288 hi->output_node_next_index = next_index;
1289 hi->output_node_index = node_index;
1291 #endif /* CLIB_MARCH_VARIANT */
1294 * fd.io coding-style-patch-verification: ON
1297 * eval: (c-set-style "gnu")