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/trace_classify.h>
49 #include <vnet/interface_output.h>
55 u8 data[128 - 2 * sizeof (u32)];
57 interface_output_trace_t;
59 #ifndef CLIB_MARCH_VARIANT
61 format_vnet_interface_output_trace (u8 * s, va_list * va)
63 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
64 vlib_node_t *node = va_arg (*va, vlib_node_t *);
65 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
66 vnet_main_t *vnm = vnet_get_main ();
67 vnet_sw_interface_t *si;
70 if (t->sw_if_index != (u32) ~ 0)
72 indent = format_get_indent (s);
74 if (pool_is_free_index
75 (vnm->interface_main.sw_interfaces, t->sw_if_index))
77 /* the interface may have been deleted by the time the trace is printed */
78 s = format (s, "sw_if_index: %d ", t->sw_if_index);
82 si = vnet_get_sw_interface (vnm, t->sw_if_index);
84 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
88 format (s, "\n%U%U", format_white_space, indent,
89 node->format_buffer ? node->format_buffer : format_hex_bytes,
90 t->data, sizeof (t->data));
94 #endif /* CLIB_MARCH_VARIANT */
97 vnet_interface_output_trace (vlib_main_t * vm,
98 vlib_node_runtime_t * node,
99 vlib_frame_t * frame, uword n_buffers)
104 from = vlib_frame_vector_args (frame);
109 vlib_buffer_t *b0, *b1;
110 interface_output_trace_t *t0, *t1;
112 /* Prefetch next iteration. */
113 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
114 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
119 b0 = vlib_get_buffer (vm, bi0);
120 b1 = vlib_get_buffer (vm, bi1);
122 if (b0->flags & VLIB_BUFFER_IS_TRACED)
124 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
125 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
126 t0->flags = b0->flags;
127 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
130 if (b1->flags & VLIB_BUFFER_IS_TRACED)
132 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
133 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
134 t1->flags = b1->flags;
135 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
146 interface_output_trace_t *t0;
150 b0 = vlib_get_buffer (vm, bi0);
152 if (b0->flags & VLIB_BUFFER_IS_TRACED)
154 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
155 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
156 t0->flags = b0->flags;
157 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
165 static_always_inline uword
166 vnet_interface_output_node_inline (vlib_main_t * vm,
167 vlib_node_runtime_t * node,
168 vlib_frame_t * frame,
170 vnet_hw_interface_t * hi,
173 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
174 vnet_sw_interface_t *si;
175 u32 n_left_to_tx, *from, *from_end, *to_tx;
176 u32 n_bytes, n_buffers, n_packets;
177 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
178 u32 thread_index = vm->thread_index;
179 vnet_interface_main_t *im = &vnm->interface_main;
180 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
181 u32 current_config_index = ~0;
182 u8 arc = im->output_feature_arc_index;
183 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
185 n_buffers = frame->n_vectors;
187 if (node->flags & VLIB_NODE_FLAG_TRACE)
188 vnet_interface_output_trace (vm, node, frame, n_buffers);
190 from = vlib_frame_vector_args (frame);
191 vlib_get_buffers (vm, from, b, n_buffers);
194 return vlib_error_drop_buffers (vm, node, from,
195 /* buffer stride */ 1,
197 VNET_INTERFACE_OUTPUT_NEXT_DROP,
199 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
201 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
202 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
203 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
204 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
206 vlib_simple_counter_main_t *cm;
208 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
209 VNET_INTERFACE_COUNTER_TX_ERROR);
210 vlib_increment_simple_counter (cm, thread_index,
211 rt->sw_if_index, n_buffers);
213 return vlib_error_drop_buffers (vm, node, from,
214 /* buffer stride */ 1,
216 VNET_INTERFACE_OUTPUT_NEXT_DROP,
218 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
221 from_end = from + n_buffers;
223 /* Total byte count of all buffers. */
227 /* interface-output feature arc handling */
228 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
230 vnet_feature_config_main_t *fcm;
231 fcm = vnet_feature_get_config_main (arc);
232 current_config_index = vnet_get_feature_config_index (arc,
234 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
238 while (from < from_end)
240 /* Get new next frame since previous incomplete frame may have less
241 than VNET_FRAME_SIZE vectors in it. */
242 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
244 while (from + 8 <= from_end && n_left_to_tx >= 4)
246 u32 bi0, bi1, bi2, bi3;
247 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
250 /* Prefetch next iteration. */
251 vlib_prefetch_buffer_header (b[4], LOAD);
252 vlib_prefetch_buffer_header (b[5], LOAD);
253 vlib_prefetch_buffer_header (b[6], LOAD);
254 vlib_prefetch_buffer_header (b[7], LOAD);
265 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
271 /* Be grumpy about zero length buffers for benefit of
272 driver tx function. */
273 ASSERT (b[0]->current_length > 0);
274 ASSERT (b[1]->current_length > 0);
275 ASSERT (b[2]->current_length > 0);
276 ASSERT (b[3]->current_length > 0);
278 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
279 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
280 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
281 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
282 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
283 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
284 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
285 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
287 n_bytes += n_bytes_b0 + n_bytes_b1;
288 n_bytes += n_bytes_b2 + n_bytes_b3;
291 if (PREDICT_FALSE (current_config_index != ~0))
293 vnet_buffer (b[0])->feature_arc_index = arc;
294 vnet_buffer (b[1])->feature_arc_index = arc;
295 vnet_buffer (b[2])->feature_arc_index = arc;
296 vnet_buffer (b[3])->feature_arc_index = arc;
297 b[0]->current_config_index = current_config_index;
298 b[1]->current_config_index = current_config_index;
299 b[2]->current_config_index = current_config_index;
300 b[3]->current_config_index = current_config_index;
303 /* update vlan subif tx counts, if required */
304 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
306 vlib_increment_combined_counter (im->combined_sw_if_counters +
307 VNET_INTERFACE_COUNTER_TX,
308 thread_index, tx_swif0, 1,
312 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
315 vlib_increment_combined_counter (im->combined_sw_if_counters +
316 VNET_INTERFACE_COUNTER_TX,
317 thread_index, tx_swif1, 1,
321 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
324 vlib_increment_combined_counter (im->combined_sw_if_counters +
325 VNET_INTERFACE_COUNTER_TX,
326 thread_index, tx_swif2, 1,
329 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
332 vlib_increment_combined_counter (im->combined_sw_if_counters +
333 VNET_INTERFACE_COUNTER_TX,
334 thread_index, tx_swif3, 1,
340 if (or_flags & VNET_BUFFER_F_OFFLOAD)
342 if (b[0]->flags & VNET_BUFFER_F_OFFLOAD)
343 vnet_calc_checksums_inline
345 b[0]->flags & VNET_BUFFER_F_IS_IP4,
346 b[0]->flags & VNET_BUFFER_F_IS_IP6);
347 if (b[1]->flags & VNET_BUFFER_F_OFFLOAD)
348 vnet_calc_checksums_inline
350 b[1]->flags & VNET_BUFFER_F_IS_IP4,
351 b[1]->flags & VNET_BUFFER_F_IS_IP6);
352 if (b[2]->flags & VNET_BUFFER_F_OFFLOAD)
353 vnet_calc_checksums_inline
355 b[2]->flags & VNET_BUFFER_F_IS_IP4,
356 b[2]->flags & VNET_BUFFER_F_IS_IP6);
357 if (b[3]->flags & VNET_BUFFER_F_OFFLOAD)
358 vnet_calc_checksums_inline
360 b[3]->flags & VNET_BUFFER_F_IS_IP4,
361 b[3]->flags & VNET_BUFFER_F_IS_IP6);
368 while (from + 1 <= from_end && n_left_to_tx >= 1)
379 /* Be grumpy about zero length buffers for benefit of
380 driver tx function. */
381 ASSERT (b[0]->current_length > 0);
383 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
384 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
385 n_bytes += n_bytes_b0;
388 if (PREDICT_FALSE (current_config_index != ~0))
390 vnet_buffer (b[0])->feature_arc_index = arc;
391 b[0]->current_config_index = current_config_index;
394 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
397 vlib_increment_combined_counter (im->combined_sw_if_counters +
398 VNET_INTERFACE_COUNTER_TX,
399 thread_index, tx_swif0, 1,
405 if (b[0]->flags & VNET_BUFFER_F_OFFLOAD)
406 vnet_calc_checksums_inline
408 b[0]->flags & VNET_BUFFER_F_IS_IP4,
409 b[0]->flags & VNET_BUFFER_F_IS_IP6);
414 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
417 /* Update main interface stats. */
418 vlib_increment_combined_counter (im->combined_sw_if_counters
419 + VNET_INTERFACE_COUNTER_TX,
421 rt->sw_if_index, n_packets, n_bytes);
425 static_always_inline void vnet_interface_pcap_tx_trace
426 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
427 int sw_if_index_from_buffer)
429 u32 n_left_from, *from;
431 vnet_pcap_t *pp = &vlib_global_main.pcap;
433 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
436 if (sw_if_index_from_buffer == 0)
438 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
439 sw_if_index = rt->sw_if_index;
444 n_left_from = frame->n_vectors;
445 from = vlib_frame_vector_args (frame);
447 while (n_left_from > 0)
449 int classify_filter_result;
451 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
455 if (pp->filter_classify_table_index != ~0)
457 classify_filter_result =
458 vnet_is_packet_traced_inline
459 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
460 if (classify_filter_result)
461 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
465 if (sw_if_index_from_buffer)
466 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
468 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
470 vnet_main_t *vnm = vnet_get_main ();
471 vnet_hw_interface_t *hi =
472 vnet_get_sup_hw_interface (vnm, sw_if_index);
473 /* Capture pkt if not filtered, or if filter hits */
474 if (hi->trace_classify_table_index == ~0 ||
475 vnet_is_packet_traced_inline
476 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
477 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
482 static vlib_node_function_t CLIB_MULTIARCH_FN (vnet_interface_output_node);
485 CLIB_MULTIARCH_FN (vnet_interface_output_node) (vlib_main_t * vm,
486 vlib_node_runtime_t * node,
487 vlib_frame_t * frame)
489 vnet_main_t *vnm = vnet_get_main ();
490 vnet_hw_interface_t *hi;
491 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
492 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
494 vnet_interface_pcap_tx_trace (vm, node, frame,
495 0 /* sw_if_index_from_buffer */ );
497 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
498 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
499 /* do_tx_offloads */ 0);
501 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
502 /* do_tx_offloads */ 1);
505 CLIB_MARCH_FN_REGISTRATION (vnet_interface_output_node);
507 #ifndef CLIB_MARCH_VARIANT
508 vlib_node_function_t *
509 vnet_interface_output_node_get (void)
511 return CLIB_MARCH_FN_POINTER (vnet_interface_output_node);
513 #endif /* CLIB_MARCH_VARIANT */
515 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
516 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
517 vlib_node_runtime_t *
519 vlib_frame_t * frame)
521 vnet_main_t *vnm = vnet_get_main ();
522 u32 n_left_to_next, *from, *to_next;
523 u32 n_left_from, next_index;
525 vnet_interface_pcap_tx_trace (vm, node, frame,
526 1 /* sw_if_index_from_buffer */ );
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;
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 do_trace = (pp->pcap_sw_if_index == 0) ||
937 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
940 (do_trace == 0 && pp->filter_classify_table_index != ~0))
942 do_trace = vnet_is_packet_traced_inline
943 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
946 /* Trace all drops, or drops received on a specific interface */
949 save_current_data = b0->current_data;
950 save_current_length = b0->current_length;
953 * Typically, we'll need to rewind the buffer
954 * if l2_hdr_offset is valid, make sure to rewind to the start of
955 * the L2 header. This may not be the buffer start in case we pop-ed
957 * Otherwise, rewind to buffer start and hope for the best.
959 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
961 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
962 vlib_buffer_advance (b0,
963 vnet_buffer (b0)->l2_hdr_offset -
966 else if (b0->current_data > 0)
967 vlib_buffer_advance (b0, (word) - b0->current_data);
970 vlib_buffer_t *last = b0;
971 u32 error_node_index;
974 /* Length of the error string */
975 int error_string_len =
976 clib_strnlen (em->counters_heap[b0->error].name, 128);
978 /* Dig up the drop node */
979 error_node_index = vm->node_main.node_by_error[b0->error];
980 n = vlib_get_node (vm, error_node_index);
982 /* Length of full drop string, w/ "nodename: " prepended */
983 drop_string_len = error_string_len + vec_len (n->name) + 2;
985 /* Find the last buffer in the chain */
986 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
987 last = vlib_get_buffer (vm, last->next_buffer);
990 * Append <nodename>: <error-string> to the capture,
991 * only if we can do that without allocating a new buffer.
993 if (PREDICT_TRUE ((last->current_data + last->current_length)
994 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
997 clib_memcpy_fast (last->data + last->current_data +
998 last->current_length, n->name,
1000 clib_memcpy_fast (last->data + last->current_data +
1001 last->current_length + vec_len (n->name),
1003 clib_memcpy_fast (last->data + last->current_data +
1004 last->current_length + vec_len (n->name) +
1005 2, em->counters_heap[b0->error].name,
1007 last->current_length += drop_string_len;
1008 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1009 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1010 pp->max_bytes_per_pkt);
1011 last->current_length -= drop_string_len;
1012 b0->current_data = save_current_data;
1013 b0->current_length = save_current_length;
1019 * Didn't have space in the last buffer, here's the dropped
1022 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1024 b0->current_data = save_current_data;
1025 b0->current_length = save_current_length;
1030 #ifndef CLIB_MARCH_VARIANT
1032 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1034 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1036 if (im->pcap_drop_filter_hash == 0)
1037 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1040 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1042 hash_unset (im->pcap_drop_filter_hash, error_index);
1044 #endif /* CLIB_MARCH_VARIANT */
1046 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1047 vlib_node_runtime_t * node,
1048 vlib_frame_t * frame)
1050 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1051 vnet_pcap_t *pp = &vlib_global_main.pcap;
1053 if (PREDICT_FALSE (pp->pcap_drop_enable))
1054 pcap_drop_trace (vm, im, pp, frame);
1056 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1059 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1060 vlib_node_runtime_t * node,
1061 vlib_frame_t * frame)
1063 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1067 VLIB_REGISTER_NODE (interface_drop) = {
1068 .name = "error-drop",
1069 .vector_size = sizeof (u32),
1070 .format_trace = format_vnet_error_trace,
1071 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1080 VLIB_REGISTER_NODE (interface_punt) = {
1081 .name = "error-punt",
1082 .vector_size = sizeof (u32),
1083 .format_trace = format_vnet_error_trace,
1084 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1093 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1094 .name = "interface-output",
1095 .vector_size = sizeof (u32),
1100 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1101 vlib_frame_t * from_frame)
1103 vnet_main_t *vnm = vnet_get_main ();
1104 u32 last_sw_if_index = ~0;
1105 vlib_frame_t *to_frame = 0;
1106 vnet_hw_interface_t *hw = 0;
1107 u32 *from, *to_next = 0;
1110 from = vlib_frame_vector_args (from_frame);
1111 n_left_from = from_frame->n_vectors;
1112 while (n_left_from > 0)
1121 b0 = vlib_get_buffer (vm, bi0);
1122 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1124 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1128 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1129 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1131 last_sw_if_index = sw_if_index0;
1132 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1133 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1134 to_next = vlib_frame_vector_args (to_frame);
1139 to_frame->n_vectors++;
1141 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1142 return from_frame->n_vectors;
1146 VLIB_REGISTER_NODE (interface_tx) = {
1147 .function = interface_tx_node_fn,
1148 .name = "interface-tx",
1149 .vector_size = sizeof (u32),
1156 VNET_FEATURE_ARC_INIT (interface_output, static) =
1158 .arc_name = "interface-output",
1159 .start_nodes = VNET_FEATURES (0),
1160 .last_in_arc = "interface-tx",
1161 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1164 VNET_FEATURE_INIT (span_tx, static) = {
1165 .arc_name = "interface-output",
1166 .node_name = "span-output",
1167 .runs_before = VNET_FEATURES ("interface-tx"),
1170 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1171 .arc_name = "interface-output",
1172 .node_name = "ipsec-if-output",
1173 .runs_before = VNET_FEATURES ("interface-tx"),
1176 VNET_FEATURE_INIT (interface_tx, static) = {
1177 .arc_name = "interface-output",
1178 .node_name = "interface-tx",
1183 #ifndef CLIB_MARCH_VARIANT
1185 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1189 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1192 if (hi->output_node_index == 0)
1195 next_index = vlib_node_add_next
1196 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1197 hi->output_node_index);
1198 hi->output_node_next_index = next_index;
1203 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1204 (vnet_per_buffer_interface_output_hw_interface_add_del);
1207 vnet_set_interface_output_node (vnet_main_t * vnm,
1208 u32 hw_if_index, u32 node_index)
1210 ASSERT (node_index);
1211 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1212 u32 next_index = vlib_node_add_next
1213 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1214 hi->output_node_next_index = next_index;
1215 hi->output_node_index = node_index;
1217 #endif /* CLIB_MARCH_VARIANT */
1220 * fd.io coding-style-patch-verification: ON
1223 * eval: (c-set-style "gnu")