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>
52 #include <vppinfra/vector/count_equal.h>
58 u8 data[128 - 2 * sizeof (u32)];
60 interface_output_trace_t;
62 #ifndef CLIB_MARCH_VARIANT
64 format_vnet_interface_output_trace (u8 * s, va_list * va)
66 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
67 vlib_node_t *node = va_arg (*va, vlib_node_t *);
68 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
69 vnet_main_t *vnm = vnet_get_main ();
70 vnet_sw_interface_t *si;
73 if (t->sw_if_index != (u32) ~ 0)
75 indent = format_get_indent (s);
77 if (pool_is_free_index
78 (vnm->interface_main.sw_interfaces, t->sw_if_index))
80 /* the interface may have been deleted by the time the trace is printed */
81 s = format (s, "sw_if_index: %d ", t->sw_if_index);
85 si = vnet_get_sw_interface (vnm, t->sw_if_index);
87 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
91 format (s, "\n%U%U", format_white_space, indent,
92 node->format_buffer ? node->format_buffer : format_hex_bytes,
93 t->data, sizeof (t->data));
97 #endif /* CLIB_MARCH_VARIANT */
100 vnet_interface_output_trace (vlib_main_t * vm,
101 vlib_node_runtime_t * node,
102 vlib_frame_t * frame, uword n_buffers)
107 from = vlib_frame_vector_args (frame);
112 vlib_buffer_t *b0, *b1;
113 interface_output_trace_t *t0, *t1;
115 /* Prefetch next iteration. */
116 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
117 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
122 b0 = vlib_get_buffer (vm, bi0);
123 b1 = vlib_get_buffer (vm, bi1);
125 if (b0->flags & VLIB_BUFFER_IS_TRACED)
127 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
128 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
129 t0->flags = b0->flags;
130 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
133 if (b1->flags & VLIB_BUFFER_IS_TRACED)
135 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
136 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
137 t1->flags = b1->flags;
138 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
149 interface_output_trace_t *t0;
153 b0 = vlib_get_buffer (vm, bi0);
155 if (b0->flags & VLIB_BUFFER_IS_TRACED)
157 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
158 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
159 t0->flags = b0->flags;
160 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
168 static_always_inline void
169 vnet_interface_output_handle_offload (vlib_main_t *vm, vlib_buffer_t *b)
171 vnet_calc_checksums_inline (vm, b, b->flags & VNET_BUFFER_F_IS_IP4,
172 b->flags & VNET_BUFFER_F_IS_IP6);
173 vnet_calc_outer_checksums_inline (vm, b);
176 static_always_inline uword
177 vnet_interface_output_node_inline (vlib_main_t *vm, u32 sw_if_index,
178 vlib_combined_counter_main_t *ccm,
179 vlib_buffer_t **b, u32 config_index, u8 arc,
180 u32 n_left, int processing_level)
183 u32 n_bytes0, n_bytes1, n_bytes2, n_bytes3;
184 u32 ti = vm->thread_index;
190 /* Prefetch next iteration. */
191 vlib_prefetch_buffer_header (b[4], LOAD);
192 vlib_prefetch_buffer_header (b[5], LOAD);
193 vlib_prefetch_buffer_header (b[6], LOAD);
194 vlib_prefetch_buffer_header (b[7], LOAD);
196 if (processing_level >= 1)
197 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
199 /* Be grumpy about zero length buffers for benefit of
200 driver tx function. */
201 ASSERT (b[0]->current_length > 0);
202 ASSERT (b[1]->current_length > 0);
203 ASSERT (b[2]->current_length > 0);
204 ASSERT (b[3]->current_length > 0);
206 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
207 n_bytes += n_bytes1 = vlib_buffer_length_in_chain (vm, b[1]);
208 n_bytes += n_bytes2 = vlib_buffer_length_in_chain (vm, b[2]);
209 n_bytes += n_bytes3 = vlib_buffer_length_in_chain (vm, b[3]);
211 if (processing_level >= 2)
213 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
214 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
215 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
216 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
217 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
219 /* update vlan subif tx counts, if required */
220 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
221 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
223 if (PREDICT_FALSE (tx_swif1 != sw_if_index))
224 vlib_increment_combined_counter (ccm, ti, tx_swif1, 1, n_bytes1);
226 if (PREDICT_FALSE (tx_swif2 != sw_if_index))
227 vlib_increment_combined_counter (ccm, ti, tx_swif2, 1, n_bytes2);
229 if (PREDICT_FALSE (tx_swif3 != sw_if_index))
230 vlib_increment_combined_counter (ccm, ti, tx_swif3, 1, n_bytes3);
232 if (PREDICT_FALSE (config_index != ~0))
234 vnet_buffer (b[0])->feature_arc_index = arc;
235 b[0]->current_config_index = config_index;
236 vnet_buffer (b[1])->feature_arc_index = arc;
237 b[1]->current_config_index = config_index;
238 vnet_buffer (b[2])->feature_arc_index = arc;
239 b[2]->current_config_index = config_index;
240 vnet_buffer (b[3])->feature_arc_index = arc;
241 b[3]->current_config_index = config_index;
245 if (processing_level >= 1 && (or_flags & VNET_BUFFER_F_OFFLOAD))
247 vnet_interface_output_handle_offload (vm, b[0]);
248 vnet_interface_output_handle_offload (vm, b[1]);
249 vnet_interface_output_handle_offload (vm, b[2]);
250 vnet_interface_output_handle_offload (vm, b[3]);
259 /* Be grumpy about zero length buffers for benefit of
260 driver tx function. */
261 ASSERT (b[0]->current_length > 0);
263 n_bytes += n_bytes0 = vlib_buffer_length_in_chain (vm, b[0]);
265 if (processing_level >= 2)
267 u32 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
269 if (PREDICT_FALSE (config_index != ~0))
271 vnet_buffer (b[0])->feature_arc_index = arc;
272 b[0]->current_config_index = config_index;
275 if (PREDICT_FALSE (tx_swif0 != sw_if_index))
276 vlib_increment_combined_counter (ccm, ti, tx_swif0, 1, n_bytes0);
279 if (processing_level >= 1)
280 vnet_interface_output_handle_offload (vm, b[0]);
289 static_always_inline void
290 vnet_interface_pcap_tx_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
291 vlib_frame_t *frame, int in_interface_ouput)
293 vnet_main_t *vnm = vnet_get_main ();
294 u32 n_left_from, *from;
295 u32 sw_if_index = ~0, hw_if_index = ~0;
296 vnet_pcap_t *pp = &vnm->pcap;
298 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
301 if (in_interface_ouput)
303 /* interface-output is called right before interface-output-template.
304 * We only want to capture packets here if there is a per-interface
305 * filter, in case it matches the sub-interface sw_if_index.
306 * If there is no per-interface filter configured, let the
307 * interface-output-template node deal with it */
308 if (pp->pcap_sw_if_index == 0)
313 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
314 sw_if_index = rt->sw_if_index;
317 n_left_from = frame->n_vectors;
318 from = vlib_frame_vector_args (frame);
320 while (n_left_from > 0)
323 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
327 if (in_interface_ouput)
329 const u32 sii = vnet_buffer (b0)->sw_if_index[VLIB_TX];
330 if (PREDICT_FALSE (sii != sw_if_index))
332 const vnet_hw_interface_t *hi =
333 vnet_get_sup_hw_interface (vnm, sii);
334 hw_if_index = hi->sw_if_index;
337 if (hw_if_index == sw_if_index)
338 continue; /* defer to interface-output-template */
341 if (vnet_is_packet_pcaped (pp, b0, sw_if_index))
342 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
346 static_always_inline void
347 store_tx_frame_scalar_data (vnet_hw_if_output_node_runtime_t *r,
348 vnet_hw_if_tx_frame_t *tf)
351 clib_memcpy_fast (tf, &r->frame, sizeof (vnet_hw_if_tx_frame_t));
354 static_always_inline void
355 enqueu_to_tx_node (vlib_main_t *vm, vlib_node_runtime_t *node,
356 vnet_hw_interface_t *hi, u32 *from, u32 n_vectors)
358 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
359 vnet_hw_if_output_node_runtime_t *r = 0;
360 u32 n_free, n_copy, *to;
361 vnet_hw_if_tx_frame_t *tf;
364 ASSERT (n_vectors <= VLIB_FRAME_SIZE);
366 if (hi->output_node_thread_runtimes)
367 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
369 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
370 tf = vlib_frame_scalar_args (f);
372 if (f->n_vectors > 0 && (r == 0 || tf->queue_id == r->frame.queue_id))
374 /* append current next frame */
375 n_free = VLIB_FRAME_SIZE - f->n_vectors;
376 n_copy = clib_min (n_vectors, n_free);
378 to = vlib_frame_vector_args (f);
383 if (f->n_vectors > 0)
385 /* current frame doesn't fit - grab empty one */
386 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
387 tf = vlib_frame_scalar_args (f);
390 /* empty frame - store scalar data */
391 store_tx_frame_scalar_data (r, tf);
392 to = vlib_frame_vector_args (f);
393 n_free = VLIB_FRAME_SIZE;
398 vlib_buffer_copy_indices (to, from, n_copy);
399 vlib_put_next_frame (vm, node, next_index, n_free - n_copy);
404 /* we have more indices to store, take empty frame */
406 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
407 store_tx_frame_scalar_data (r, vlib_frame_scalar_args (f));
408 vlib_buffer_copy_indices (vlib_frame_vector_args (f), from, n_vectors);
409 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_vectors);
412 VLIB_NODE_FN (vnet_interface_output_node)
413 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
415 vnet_main_t *vnm = vnet_get_main ();
416 vnet_interface_main_t *im = &vnm->interface_main;
417 vlib_combined_counter_main_t *ccm;
418 vnet_hw_interface_t *hi;
419 vnet_sw_interface_t *si;
420 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
421 vlib_buffer_t *bufs[VLIB_FRAME_SIZE];
422 u32 n_bytes, n_buffers = frame->n_vectors;
423 u32 config_index = ~0;
424 u32 sw_if_index = rt->sw_if_index;
425 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
426 u32 ti = vm->thread_index;
427 u8 arc = im->output_feature_arc_index;
428 int arc_or_subif = 0;
429 int do_tx_offloads = 0;
432 if (node->flags & VLIB_NODE_FLAG_TRACE)
433 vnet_interface_output_trace (vm, node, frame, n_buffers);
435 from = vlib_frame_vector_args (frame);
438 return vlib_error_drop_buffers (
440 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
441 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
443 vnet_interface_pcap_tx_trace (vm, node, frame, 0 /* in_interface_ouput */);
445 vlib_get_buffers (vm, from, bufs, n_buffers);
447 si = vnet_get_sw_interface (vnm, sw_if_index);
448 hi = vnet_get_sup_hw_interface (vnm, sw_if_index);
450 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
451 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
453 vlib_simple_counter_main_t *cm;
455 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
456 VNET_INTERFACE_COUNTER_TX_ERROR);
457 vlib_increment_simple_counter (cm, ti, sw_if_index, n_buffers);
459 return vlib_error_drop_buffers (
461 /* buffer stride */ 1, n_buffers, VNET_INTERFACE_OUTPUT_NEXT_DROP,
462 node->node_index, VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
465 /* interface-output feature arc handling */
466 if (PREDICT_FALSE (vnet_have_features (arc, sw_if_index)))
468 vnet_feature_config_main_t *fcm;
469 fcm = vnet_feature_get_config_main (arc);
470 config_index = vnet_get_feature_config_index (arc, sw_if_index);
471 vnet_get_config_data (&fcm->config_main, &config_index, &next_index, 0);
474 else if (hash_elts (hi->sub_interface_sw_if_index_by_id))
477 ccm = im->combined_sw_if_counters + VNET_INTERFACE_COUNTER_TX;
479 /* if not all three flags IP4_,TCP_,UDP_CKSUM set, do compute them
480 * here before sending to the interface */
481 if ((hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM) !=
482 VNET_HW_INTERFACE_CAP_SUPPORTS_TX_CKSUM)
485 if (do_tx_offloads == 0 && arc_or_subif == 0)
486 n_bytes = vnet_interface_output_node_inline (
487 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 0);
488 else if (do_tx_offloads == 1 && arc_or_subif == 0)
489 n_bytes = vnet_interface_output_node_inline (
490 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 1);
492 n_bytes = vnet_interface_output_node_inline (
493 vm, sw_if_index, ccm, bufs, config_index, arc, n_buffers, 2);
495 from = vlib_frame_vector_args (frame);
496 if (PREDICT_TRUE (next_index == VNET_INTERFACE_OUTPUT_NEXT_TX))
498 enqueu_to_tx_node (vm, node, hi, from, frame->n_vectors);
502 vlib_buffer_enqueue_to_single_next (vm, node, from, next_index,
506 /* Update main interface stats. */
507 vlib_increment_combined_counter (ccm, ti, sw_if_index, n_buffers, n_bytes);
511 VLIB_REGISTER_NODE (vnet_interface_output_node) = {
512 .name = "interface-output-template",
513 .vector_size = sizeof (u32),
516 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
517 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
518 vlib_node_runtime_t *
520 vlib_frame_t * frame)
522 vnet_main_t *vnm = vnet_get_main ();
523 u32 n_left_to_next, *from, *to_next;
524 u32 n_left_from, next_index;
526 vnet_interface_pcap_tx_trace (vm, node, frame, 1 /* in_interface_ouput */);
528 n_left_from = frame->n_vectors;
530 from = vlib_frame_vector_args (frame);
531 next_index = node->cached_next_index;
533 while (n_left_from > 0)
535 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
537 while (n_left_from >= 4 && n_left_to_next >= 2)
539 u32 bi0, bi1, next0, next1;
540 vlib_buffer_t *b0, *b1;
541 vnet_hw_interface_t *hi0, *hi1;
543 /* Prefetch next iteration. */
544 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
545 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
556 b0 = vlib_get_buffer (vm, bi0);
557 b1 = vlib_get_buffer (vm, bi1);
560 vnet_get_sup_hw_interface (vnm,
561 vnet_buffer (b0)->sw_if_index
564 vnet_get_sup_hw_interface (vnm,
565 vnet_buffer (b1)->sw_if_index
568 next0 = hi0->output_node_next_index;
569 next1 = hi1->output_node_next_index;
571 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
572 n_left_to_next, bi0, bi1, next0,
576 while (n_left_from > 0 && n_left_to_next > 0)
580 vnet_hw_interface_t *hi0;
589 b0 = vlib_get_buffer (vm, bi0);
592 vnet_get_sup_hw_interface (vnm,
593 vnet_buffer (b0)->sw_if_index
596 next0 = hi0->output_node_next_index;
598 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
599 n_left_to_next, bi0, next0);
602 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
605 return frame->n_vectors;
608 typedef struct vnet_error_trace_t_
615 ip46_address_t src, dst;
616 } vnet_error_trace_t;
619 format_vnet_error_trace (u8 * s, va_list * va)
621 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
622 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
623 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
625 /* Normal, non-catchup trace */
626 if (t->details_valid == 0)
628 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
629 vnet_get_main (), t->sw_if_index);
631 else if (t->details_valid == 1)
633 /* The trace capture code didn't understant the mactype */
634 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
636 else if (t->details_valid == 2)
638 /* Dump the src/dst addresses */
640 s = format (s, "IP4: %U -> %U",
641 format_ip4_address, &t->src.ip4,
642 format_ip4_address, &t->dst.ip4);
644 s = format (s, "IP6: %U -> %U",
645 format_ip6_address, &t->src.ip6,
646 format_ip6_address, &t->dst.ip6);
652 interface_trace_buffers (vlib_main_t * vm,
653 vlib_node_runtime_t * node, vlib_frame_t * frame)
655 u32 n_left, *buffers;
657 buffers = vlib_frame_vector_args (frame);
658 n_left = frame->n_vectors;
663 vlib_buffer_t *b0, *b1;
664 vnet_error_trace_t *t0, *t1;
666 /* Prefetch next iteration. */
667 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
668 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
673 b0 = vlib_get_buffer (vm, bi0);
674 b1 = vlib_get_buffer (vm, bi1);
676 if (b0->flags & VLIB_BUFFER_IS_TRACED)
678 t0 = vlib_add_trace (vm, node, b0,
679 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
680 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
681 t0->details_valid = 0;
683 if (b1->flags & VLIB_BUFFER_IS_TRACED)
685 t1 = vlib_add_trace (vm, node, b1,
686 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
687 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
688 t1->details_valid = 0;
698 vnet_error_trace_t *t0;
702 b0 = vlib_get_buffer (vm, bi0);
704 if (b0->flags & VLIB_BUFFER_IS_TRACED)
706 t0 = vlib_add_trace (vm, node, b0,
707 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
708 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
709 t0->details_valid = 0;
718 VNET_ERROR_DISPOSITION_DROP,
719 VNET_ERROR_DISPOSITION_PUNT,
720 VNET_ERROR_N_DISPOSITION,
721 } vnet_error_disposition_t;
724 drop_catchup_trace (vlib_main_t * vm,
725 vlib_node_runtime_t * node, vlib_buffer_t * b)
727 /* Can we safely rewind the buffer? If not, fagedaboudit */
728 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
730 vnet_error_trace_t *t;
733 ethernet_header_t *eh;
736 t = vlib_add_trace (vm, node, b, sizeof (*t));
737 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
738 vlib_buffer_advance (b, delta);
740 eh = vlib_buffer_get_current (b);
742 t->mactype = clib_net_to_host_u16 (eh->type);
743 t->details_valid = 1;
746 case ETHERNET_TYPE_IP4:
747 ip4 = (void *) (eh + 1);
748 t->details_valid = 2;
750 t->src.ip4.as_u32 = ip4->src_address.as_u32;
751 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
754 case ETHERNET_TYPE_IP6:
755 ip6 = (void *) (eh + 1);
756 t->details_valid = 2;
758 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
759 sizeof (ip6_address_t));
760 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
761 sizeof (ip6_address_t));
765 /* Dunno, do nothing, leave details_valid alone */
768 /* Restore current data (probably unnecessary) */
769 vlib_buffer_advance (b, -delta);
773 static_always_inline uword
774 interface_drop_punt (vlib_main_t * vm,
775 vlib_node_runtime_t * node,
776 vlib_frame_t * frame,
777 vnet_error_disposition_t disposition)
779 u32 *from, n_left, thread_index, *sw_if_index;
780 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
781 u32 sw_if_indices[VLIB_FRAME_SIZE];
782 vlib_simple_counter_main_t *cm;
783 u16 nexts[VLIB_FRAME_SIZE];
787 vnm = vnet_get_main ();
788 thread_index = vm->thread_index;
789 from = vlib_frame_vector_args (frame);
790 n_left = frame->n_vectors;
792 sw_if_index = sw_if_indices;
794 vlib_get_buffers (vm, from, bufs, n_left);
796 /* "trace add error-drop NNN?" */
797 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
799 /* If pkts aren't otherwise traced... */
800 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
802 /* Trace them from here */
803 node->flags |= VLIB_NODE_FLAG_TRACE;
804 while (n_trace && n_left)
807 (vlib_trace_buffer (vm, node, 0 /* next_index */ , b[0],
808 0 /* follow chain */ )))
811 * Here we have a wireshark dissector problem.
812 * Packets may be well-formed, or not. We
813 * must not blow chunks in any case.
815 * Try to produce trace records which will help
816 * folks understand what's going on.
818 drop_catchup_trace (vm, node, b[0]);
826 vlib_set_trace_count (vm, node, n_trace);
828 n_left = frame->n_vectors;
831 if (node->flags & VLIB_NODE_FLAG_TRACE)
832 interface_trace_buffers (vm, node, frame);
834 /* All going to drop regardless, this is just a counting exercise */
835 clib_memset (nexts, 0, sizeof (nexts));
837 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
838 (disposition == VNET_ERROR_DISPOSITION_PUNT
839 ? VNET_INTERFACE_COUNTER_PUNT
840 : VNET_INTERFACE_COUNTER_DROP));
842 /* collect the array of interfaces first ... */
847 /* Prefetch 8 ahead - there's not much going on in each iteration */
848 vlib_prefetch_buffer_header (b[4], LOAD);
849 vlib_prefetch_buffer_header (b[5], LOAD);
850 vlib_prefetch_buffer_header (b[6], LOAD);
851 vlib_prefetch_buffer_header (b[7], LOAD);
853 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
854 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
855 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
856 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
864 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
871 /* ... then count against them in blocks */
872 n_left = frame->n_vectors;
876 vnet_sw_interface_t *sw_if0;
879 off = frame->n_vectors - n_left;
881 sw_if_index = sw_if_indices + off;
883 count = clib_count_equal_u32 (sw_if_index, n_left);
886 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
888 /* Increment super-interface drop/punt counters for
890 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
891 if (sw_if0->sup_sw_if_index != sw_if_index[0])
892 vlib_increment_simple_counter
893 (cm, thread_index, sw_if0->sup_sw_if_index, count);
896 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
898 return frame->n_vectors;
902 pcap_drop_trace (vlib_main_t * vm,
903 vnet_interface_main_t * im,
904 vnet_pcap_t * pp, vlib_frame_t * f)
907 u32 n_left = f->n_vectors;
908 vlib_buffer_t *b0, *p1;
910 i16 save_current_data;
911 u16 save_current_length;
912 vlib_error_main_t *em = &vm->error_main;
914 from = vlib_frame_vector_args (f);
918 if (PREDICT_TRUE (n_left > 1))
920 p1 = vlib_get_buffer (vm, from[1]);
921 vlib_prefetch_buffer_header (p1, LOAD);
925 b0 = vlib_get_buffer (vm, bi0);
929 /* See if we're pointedly ignoring this specific error */
930 if (im->pcap_drop_filter_hash
931 && hash_get (im->pcap_drop_filter_hash, b0->error))
934 if (!vnet_is_packet_pcaped (pp, b0, ~0))
935 continue; /* not matching, skip */
937 /* Trace all drops, or drops received on a specific interface */
938 save_current_data = b0->current_data;
939 save_current_length = b0->current_length;
942 * Typically, we'll need to rewind the buffer
943 * if l2_hdr_offset is valid, make sure to rewind to the start of
944 * the L2 header. This may not be the buffer start in case we pop-ed
946 * Otherwise, rewind to buffer start and hope for the best.
948 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
950 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
951 vlib_buffer_advance (b0, vnet_buffer (b0)->l2_hdr_offset -
954 else if (b0->current_data > 0)
956 vlib_buffer_advance (b0, (word) -b0->current_data);
960 vlib_buffer_t *last = b0;
961 u32 error_node_index;
964 /* Length of the error string */
965 int error_string_len =
966 clib_strnlen (em->counters_heap[b0->error].name, 128);
968 /* Dig up the drop node */
969 error_node_index = vm->node_main.node_by_error[b0->error];
970 n = vlib_get_node (vm, error_node_index);
972 /* Length of full drop string, w/ "nodename: " prepended */
973 drop_string_len = error_string_len + vec_len (n->name) + 2;
975 /* Find the last buffer in the chain */
976 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
977 last = vlib_get_buffer (vm, last->next_buffer);
980 * Append <nodename>: <error-string> to the capture,
981 * only if we can do that without allocating a new buffer.
983 if (PREDICT_TRUE ((last->current_data + last->current_length) <
984 (VLIB_BUFFER_DEFAULT_DATA_SIZE - drop_string_len)))
986 clib_memcpy_fast (last->data + last->current_data +
987 last->current_length,
988 n->name, vec_len (n->name));
989 clib_memcpy_fast (last->data + last->current_data +
990 last->current_length + vec_len (n->name),
992 clib_memcpy_fast (last->data + last->current_data +
993 last->current_length + vec_len (n->name) + 2,
994 em->counters_heap[b0->error].name,
996 last->current_length += drop_string_len;
997 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
998 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
999 last->current_length -= drop_string_len;
1000 b0->current_data = save_current_data;
1001 b0->current_length = save_current_length;
1007 * Didn't have space in the last buffer, here's the dropped
1010 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1012 b0->current_data = save_current_data;
1013 b0->current_length = save_current_length;
1017 #ifndef CLIB_MARCH_VARIANT
1019 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1021 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1023 if (im->pcap_drop_filter_hash == 0)
1024 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1027 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1029 hash_unset (im->pcap_drop_filter_hash, error_index);
1031 #endif /* CLIB_MARCH_VARIANT */
1033 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1034 vlib_node_runtime_t * node,
1035 vlib_frame_t * frame)
1037 vnet_main_t *vnm = vnet_get_main ();
1038 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1039 vnet_pcap_t *pp = &vnm->pcap;
1041 if (PREDICT_FALSE (pp->pcap_drop_enable))
1042 pcap_drop_trace (vm, im, pp, frame);
1044 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1047 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1048 vlib_node_runtime_t * node,
1049 vlib_frame_t * frame)
1051 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1055 VLIB_REGISTER_NODE (interface_drop) = {
1056 .name = "error-drop",
1057 .vector_size = sizeof (u32),
1058 .format_trace = format_vnet_error_trace,
1059 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1068 VLIB_REGISTER_NODE (interface_punt) = {
1069 .name = "error-punt",
1070 .vector_size = sizeof (u32),
1071 .format_trace = format_vnet_error_trace,
1072 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1080 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1081 .name = "interface-output",
1082 .vector_size = sizeof (u32),
1085 VLIB_NODE_FN (vnet_interface_output_arc_end_node)
1086 (vlib_main_t *vm, vlib_node_runtime_t *node, vlib_frame_t *frame)
1088 vnet_main_t *vnm = vnet_get_main ();
1089 vnet_interface_main_t *im = &vnm->interface_main;
1090 vnet_hw_if_output_node_runtime_t *r = 0;
1091 vnet_hw_interface_t *hi;
1092 vnet_hw_if_tx_frame_t *tf;
1093 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
1094 u32 sw_if_indices[VLIB_FRAME_SIZE], *sw_if_index = sw_if_indices;
1095 u64 used_elts[VLIB_FRAME_SIZE / 64] = {};
1096 u64 mask[VLIB_FRAME_SIZE / 64] = {};
1097 u32 *tmp, *from, n_left, n_free, n_comp, *to, swif, off;
1101 from = vlib_frame_vector_args (frame);
1102 n_left = frame->n_vectors;
1103 vlib_get_buffers (vm, from, bufs, n_left);
1107 vlib_prefetch_buffer_header (b[4], LOAD);
1108 vlib_prefetch_buffer_header (b[5], LOAD);
1109 vlib_prefetch_buffer_header (b[6], LOAD);
1110 vlib_prefetch_buffer_header (b[7], LOAD);
1111 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1112 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
1113 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
1114 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
1123 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
1129 n_left = frame->n_vectors;
1130 swif = sw_if_indices[0];
1133 /* a bit ugly but it allows us to reuse stack space for temporary store
1134 * which may also improve memory latency */
1138 next_index = vec_elt (im->if_out_arc_end_next_index_by_sw_if_index, swif);
1139 hi = vnet_get_sup_hw_interface (vnm, swif);
1140 if (hi->output_node_thread_runtimes)
1141 r = vec_elt_at_index (hi->output_node_thread_runtimes, vm->thread_index);
1142 f = vlib_get_next_frame_internal (vm, node, next_index, 0);
1143 tf = vlib_frame_scalar_args (f);
1145 if (f->n_vectors > 0 && (r == 0 || r->frame.queue_id == tf->queue_id))
1148 n_free = VLIB_FRAME_SIZE - f->n_vectors;
1149 if (n_free >= f->n_vectors)
1150 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1156 if (f->n_vectors > 0)
1158 /* current frame doesn't fit - grab empty one */
1159 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1160 tf = vlib_frame_scalar_args (f);
1163 /* empty frame - store scalar data */
1164 store_tx_frame_scalar_data (r, tf);
1165 n_free = VLIB_FRAME_SIZE;
1166 to = vlib_frame_vector_args (f);
1169 /* compare and compress based on comparison mask */
1170 clib_mask_compare_u32 (swif, sw_if_indices, mask, frame->n_vectors);
1171 n_comp = clib_compress_u32 (to, from, mask, frame->n_vectors);
1175 /* indices already written to frame, just close it */
1176 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1178 else if (n_free >= n_comp)
1180 /* enough space in the existing frame */
1181 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1182 vlib_buffer_copy_indices (to, tmp, n_comp);
1183 vlib_put_next_frame (vm, node, next_index, n_free - n_comp);
1188 to = (u32 *) vlib_frame_vector_args (f) + f->n_vectors;
1189 vlib_buffer_copy_indices (to, tmp, n_free);
1190 vlib_put_next_frame (vm, node, next_index, 0);
1193 u32 n_frame2 = n_comp - n_free;
1194 f = vlib_get_next_frame_internal (vm, node, next_index, 1);
1195 to = vlib_frame_vector_args (f);
1196 vlib_buffer_copy_indices (to, tmp + n_free, n_frame2);
1197 tf = vlib_frame_scalar_args (f);
1198 store_tx_frame_scalar_data (r, tf);
1199 vlib_put_next_frame (vm, node, next_index, VLIB_FRAME_SIZE - n_frame2);
1205 /* store comparison mask so we can find next unused element */
1206 for (int i = 0; i < ARRAY_LEN (used_elts); i++)
1207 used_elts[i] |= mask[i];
1209 /* fine first unused sw_if_index by scanning trough used_elts bitmap */
1210 while (PREDICT_FALSE (used_elts[off] == ~0))
1214 sw_if_indices[(off << 6) + count_trailing_zeros (~used_elts[off])];
1218 return frame->n_vectors;
1221 VLIB_REGISTER_NODE (vnet_interface_output_arc_end_node) = {
1222 .name = "interface-output-arc-end",
1223 .vector_size = sizeof (u32),
1230 VNET_FEATURE_ARC_INIT (interface_output, static) = {
1231 .arc_name = "interface-output",
1232 .start_nodes = VNET_FEATURES (0),
1233 .last_in_arc = "interface-output-arc-end",
1234 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1237 VNET_FEATURE_INIT (span_tx, static) = {
1238 .arc_name = "interface-output",
1239 .node_name = "span-output",
1240 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1243 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1244 .arc_name = "interface-output",
1245 .node_name = "ipsec-if-output",
1246 .runs_before = VNET_FEATURES ("interface-output-arc-end"),
1249 VNET_FEATURE_INIT (interface_output_arc_end, static) = {
1250 .arc_name = "interface-output",
1251 .node_name = "interface-output-arc-end",
1255 #ifndef CLIB_MARCH_VARIANT
1257 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1261 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1264 if (hi->output_node_index == 0)
1267 next_index = vlib_node_add_next
1268 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1269 hi->output_node_index);
1270 hi->output_node_next_index = next_index;
1275 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1276 (vnet_per_buffer_interface_output_hw_interface_add_del);
1279 vnet_set_interface_output_node (vnet_main_t * vnm,
1280 u32 hw_if_index, u32 node_index)
1282 ASSERT (node_index);
1283 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1284 u32 next_index = vlib_node_add_next
1285 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1286 hi->output_node_next_index = next_index;
1287 hi->output_node_index = node_index;
1289 #endif /* CLIB_MARCH_VARIANT */
1292 * fd.io coding-style-patch-verification: ON
1295 * eval: (c-set-style "gnu")