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/ip4.h>
44 #include <vnet/ip/ip6.h>
45 #include <vnet/udp/udp_packet.h>
46 #include <vnet/feature/feature.h>
47 #include <vnet/classify/trace_classify.h>
48 #include <vnet/interface_output.h>
54 u8 data[128 - 2 * sizeof (u32)];
56 interface_output_trace_t;
58 #ifndef CLIB_MARCH_VARIANT
60 format_vnet_interface_output_trace (u8 * s, va_list * va)
62 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
63 vlib_node_t *node = va_arg (*va, vlib_node_t *);
64 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
65 vnet_main_t *vnm = vnet_get_main ();
66 vnet_sw_interface_t *si;
69 if (t->sw_if_index != (u32) ~ 0)
71 indent = format_get_indent (s);
73 if (pool_is_free_index
74 (vnm->interface_main.sw_interfaces, t->sw_if_index))
76 /* the interface may have been deleted by the time the trace is printed */
77 s = format (s, "sw_if_index: %d ", t->sw_if_index);
81 si = vnet_get_sw_interface (vnm, t->sw_if_index);
83 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
87 format (s, "\n%U%U", format_white_space, indent,
88 node->format_buffer ? node->format_buffer : format_hex_bytes,
89 t->data, sizeof (t->data));
95 vnet_interface_output_trace (vlib_main_t * vm,
96 vlib_node_runtime_t * node,
97 vlib_frame_t * frame, uword n_buffers)
102 from = vlib_frame_vector_args (frame);
107 vlib_buffer_t *b0, *b1;
108 interface_output_trace_t *t0, *t1;
110 /* Prefetch next iteration. */
111 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
112 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
117 b0 = vlib_get_buffer (vm, bi0);
118 b1 = vlib_get_buffer (vm, bi1);
120 if (b0->flags & VLIB_BUFFER_IS_TRACED)
122 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
123 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
124 t0->flags = b0->flags;
125 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
128 if (b1->flags & VLIB_BUFFER_IS_TRACED)
130 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
131 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
132 t1->flags = b1->flags;
133 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
144 interface_output_trace_t *t0;
148 b0 = vlib_get_buffer (vm, bi0);
150 if (b0->flags & VLIB_BUFFER_IS_TRACED)
152 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
153 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
154 t0->flags = b0->flags;
155 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
163 static_always_inline uword
164 vnet_interface_output_node_inline (vlib_main_t * vm,
165 vlib_node_runtime_t * node,
166 vlib_frame_t * frame,
168 vnet_hw_interface_t * hi,
171 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
172 vnet_sw_interface_t *si;
173 u32 n_left_to_tx, *from, *from_end, *to_tx;
174 u32 n_bytes, n_buffers, n_packets;
175 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
176 u32 thread_index = vm->thread_index;
177 vnet_interface_main_t *im = &vnm->interface_main;
178 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
179 u32 current_config_index = ~0;
180 u8 arc = im->output_feature_arc_index;
181 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
183 n_buffers = frame->n_vectors;
185 if (node->flags & VLIB_NODE_FLAG_TRACE)
186 vnet_interface_output_trace (vm, node, frame, n_buffers);
188 from = vlib_frame_vector_args (frame);
189 vlib_get_buffers (vm, from, b, n_buffers);
192 return vlib_error_drop_buffers (vm, node, from,
193 /* buffer stride */ 1,
195 VNET_INTERFACE_OUTPUT_NEXT_DROP,
197 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
199 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
200 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
201 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
202 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
204 vlib_simple_counter_main_t *cm;
206 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
207 VNET_INTERFACE_COUNTER_TX_ERROR);
208 vlib_increment_simple_counter (cm, thread_index,
209 rt->sw_if_index, n_buffers);
211 return vlib_error_drop_buffers (vm, node, from,
212 /* buffer stride */ 1,
214 VNET_INTERFACE_OUTPUT_NEXT_DROP,
216 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
219 from_end = from + n_buffers;
221 /* Total byte count of all buffers. */
225 /* interface-output feature arc handling */
226 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
228 vnet_feature_config_main_t *fcm;
229 fcm = vnet_feature_get_config_main (arc);
230 current_config_index = vnet_get_feature_config_index (arc,
232 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
236 while (from < from_end)
238 /* Get new next frame since previous incomplete frame may have less
239 than VNET_FRAME_SIZE vectors in it. */
240 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
242 while (from + 8 <= from_end && n_left_to_tx >= 4)
244 u32 bi0, bi1, bi2, bi3;
245 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
248 /* Prefetch next iteration. */
249 vlib_prefetch_buffer_header (b[4], LOAD);
250 vlib_prefetch_buffer_header (b[5], LOAD);
251 vlib_prefetch_buffer_header (b[6], LOAD);
252 vlib_prefetch_buffer_header (b[7], LOAD);
263 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
269 /* Be grumpy about zero length buffers for benefit of
270 driver tx function. */
271 ASSERT (b[0]->current_length > 0);
272 ASSERT (b[1]->current_length > 0);
273 ASSERT (b[2]->current_length > 0);
274 ASSERT (b[3]->current_length > 0);
276 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
277 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
278 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
279 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
280 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
281 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
282 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
283 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
285 n_bytes += n_bytes_b0 + n_bytes_b1;
286 n_bytes += n_bytes_b2 + n_bytes_b3;
289 if (PREDICT_FALSE (current_config_index != ~0))
291 vnet_buffer (b[0])->feature_arc_index = arc;
292 vnet_buffer (b[1])->feature_arc_index = arc;
293 vnet_buffer (b[2])->feature_arc_index = arc;
294 vnet_buffer (b[3])->feature_arc_index = arc;
295 b[0]->current_config_index = current_config_index;
296 b[1]->current_config_index = current_config_index;
297 b[2]->current_config_index = current_config_index;
298 b[3]->current_config_index = current_config_index;
301 /* update vlan subif tx counts, if required */
302 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
304 vlib_increment_combined_counter (im->combined_sw_if_counters +
305 VNET_INTERFACE_COUNTER_TX,
306 thread_index, tx_swif0, 1,
310 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
313 vlib_increment_combined_counter (im->combined_sw_if_counters +
314 VNET_INTERFACE_COUNTER_TX,
315 thread_index, tx_swif1, 1,
319 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
322 vlib_increment_combined_counter (im->combined_sw_if_counters +
323 VNET_INTERFACE_COUNTER_TX,
324 thread_index, tx_swif2, 1,
327 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
330 vlib_increment_combined_counter (im->combined_sw_if_counters +
331 VNET_INTERFACE_COUNTER_TX,
332 thread_index, tx_swif3, 1,
338 u32 vnet_buffer_offload_flags =
339 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
340 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
341 VNET_BUFFER_F_OFFLOAD_IP_CKSUM);
342 if (or_flags & vnet_buffer_offload_flags)
344 if (b[0]->flags & vnet_buffer_offload_flags)
345 vnet_calc_checksums_inline
347 b[0]->flags & VNET_BUFFER_F_IS_IP4,
348 b[0]->flags & VNET_BUFFER_F_IS_IP6);
349 if (b[1]->flags & vnet_buffer_offload_flags)
350 vnet_calc_checksums_inline
352 b[1]->flags & VNET_BUFFER_F_IS_IP4,
353 b[1]->flags & VNET_BUFFER_F_IS_IP6);
354 if (b[2]->flags & vnet_buffer_offload_flags)
355 vnet_calc_checksums_inline
357 b[2]->flags & VNET_BUFFER_F_IS_IP4,
358 b[2]->flags & VNET_BUFFER_F_IS_IP6);
359 if (b[3]->flags & vnet_buffer_offload_flags)
360 vnet_calc_checksums_inline
362 b[3]->flags & VNET_BUFFER_F_IS_IP4,
363 b[3]->flags & VNET_BUFFER_F_IS_IP6);
370 while (from + 1 <= from_end && n_left_to_tx >= 1)
381 /* Be grumpy about zero length buffers for benefit of
382 driver tx function. */
383 ASSERT (b[0]->current_length > 0);
385 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
386 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
387 n_bytes += n_bytes_b0;
390 if (PREDICT_FALSE (current_config_index != ~0))
392 vnet_buffer (b[0])->feature_arc_index = arc;
393 b[0]->current_config_index = current_config_index;
396 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
399 vlib_increment_combined_counter (im->combined_sw_if_counters +
400 VNET_INTERFACE_COUNTER_TX,
401 thread_index, tx_swif0, 1,
408 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
409 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
410 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
411 vnet_calc_checksums_inline
413 b[0]->flags & VNET_BUFFER_F_IS_IP4,
414 b[0]->flags & VNET_BUFFER_F_IS_IP6);
419 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
422 /* Update main interface stats. */
423 vlib_increment_combined_counter (im->combined_sw_if_counters
424 + VNET_INTERFACE_COUNTER_TX,
426 rt->sw_if_index, n_packets, n_bytes);
429 #endif /* CLIB_MARCH_VARIANT */
431 static_always_inline void vnet_interface_pcap_tx_trace
432 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
433 int sw_if_index_from_buffer)
435 u32 n_left_from, *from;
437 vnet_pcap_t *pp = &vlib_global_main.pcap;
439 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
442 if (sw_if_index_from_buffer == 0)
444 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
445 sw_if_index = rt->sw_if_index;
450 n_left_from = frame->n_vectors;
451 from = vlib_frame_vector_args (frame);
453 while (n_left_from > 0)
455 int classify_filter_result;
457 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
461 if (pp->filter_classify_table_index != ~0)
463 classify_filter_result =
464 vnet_is_packet_traced_inline
465 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
466 if (classify_filter_result)
467 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
471 if (sw_if_index_from_buffer)
472 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
474 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
476 vnet_main_t *vnm = vnet_get_main ();
477 vnet_hw_interface_t *hi =
478 vnet_get_sup_hw_interface (vnm, sw_if_index);
479 /* Capture pkt if not filtered, or if filter hits */
480 if (hi->trace_classify_table_index == ~0 ||
481 vnet_is_packet_traced_inline
482 (b0, hi->trace_classify_table_index, 0 /* full classify */ ))
483 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
488 #ifndef CLIB_MARCH_VARIANT
491 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
492 vlib_frame_t * frame)
494 vnet_main_t *vnm = vnet_get_main ();
495 vnet_hw_interface_t *hi;
496 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
497 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
499 vnet_interface_pcap_tx_trace (vm, node, frame,
500 0 /* sw_if_index_from_buffer */ );
502 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
503 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
504 /* do_tx_offloads */ 0);
506 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
507 /* do_tx_offloads */ 1);
509 #endif /* CLIB_MARCH_VARIANT */
511 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
512 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
513 vlib_node_runtime_t *
515 vlib_frame_t * frame)
517 vnet_main_t *vnm = vnet_get_main ();
518 u32 n_left_to_next, *from, *to_next;
519 u32 n_left_from, next_index;
521 vnet_interface_pcap_tx_trace (vm, node, frame,
522 1 /* sw_if_index_from_buffer */ );
524 n_left_from = frame->n_vectors;
526 from = vlib_frame_vector_args (frame);
527 next_index = node->cached_next_index;
529 while (n_left_from > 0)
531 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
533 while (n_left_from >= 4 && n_left_to_next >= 2)
535 u32 bi0, bi1, next0, next1;
536 vlib_buffer_t *b0, *b1;
537 vnet_hw_interface_t *hi0, *hi1;
539 /* Prefetch next iteration. */
540 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
541 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
552 b0 = vlib_get_buffer (vm, bi0);
553 b1 = vlib_get_buffer (vm, bi1);
556 vnet_get_sup_hw_interface (vnm,
557 vnet_buffer (b0)->sw_if_index
560 vnet_get_sup_hw_interface (vnm,
561 vnet_buffer (b1)->sw_if_index
564 next0 = hi0->output_node_next_index;
565 next1 = hi1->output_node_next_index;
567 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
568 n_left_to_next, bi0, bi1, next0,
572 while (n_left_from > 0 && n_left_to_next > 0)
576 vnet_hw_interface_t *hi0;
585 b0 = vlib_get_buffer (vm, bi0);
588 vnet_get_sup_hw_interface (vnm,
589 vnet_buffer (b0)->sw_if_index
592 next0 = hi0->output_node_next_index;
594 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
595 n_left_to_next, bi0, next0);
598 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
601 return frame->n_vectors;
604 typedef struct vnet_error_trace_t_
611 ip46_address_t src, dst;
612 } vnet_error_trace_t;
615 format_vnet_error_trace (u8 * s, va_list * va)
617 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
618 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
619 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
621 /* Normal, non-catchup trace */
622 if (t->details_valid == 0)
624 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
625 vnet_get_main (), t->sw_if_index);
627 else if (t->details_valid == 1)
629 /* The trace capture code didn't understant the mactype */
630 s = format (s, "mactype 0x%4x (not decoded)", t->mactype);
632 else if (t->details_valid == 2)
634 /* Dump the src/dst addresses */
636 s = format (s, "IP4: %U -> %U",
637 format_ip4_address, &t->src.ip4,
638 format_ip4_address, &t->dst.ip4);
640 s = format (s, "IP6: %U -> %U",
641 format_ip6_address, &t->src.ip6,
642 format_ip6_address, &t->dst.ip6);
648 interface_trace_buffers (vlib_main_t * vm,
649 vlib_node_runtime_t * node, vlib_frame_t * frame)
651 u32 n_left, *buffers;
653 buffers = vlib_frame_vector_args (frame);
654 n_left = frame->n_vectors;
659 vlib_buffer_t *b0, *b1;
660 vnet_error_trace_t *t0, *t1;
662 /* Prefetch next iteration. */
663 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
664 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
669 b0 = vlib_get_buffer (vm, bi0);
670 b1 = vlib_get_buffer (vm, bi1);
672 if (b0->flags & VLIB_BUFFER_IS_TRACED)
674 t0 = vlib_add_trace (vm, node, b0,
675 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
676 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
677 t0->details_valid = 0;
679 if (b1->flags & VLIB_BUFFER_IS_TRACED)
681 t1 = vlib_add_trace (vm, node, b1,
682 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
683 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
684 t1->details_valid = 0;
694 vnet_error_trace_t *t0;
698 b0 = vlib_get_buffer (vm, bi0);
700 if (b0->flags & VLIB_BUFFER_IS_TRACED)
702 t0 = vlib_add_trace (vm, node, b0,
703 STRUCT_OFFSET_OF (vnet_error_trace_t, pad));
704 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
705 t0->details_valid = 0;
714 VNET_ERROR_DISPOSITION_DROP,
715 VNET_ERROR_DISPOSITION_PUNT,
716 VNET_ERROR_N_DISPOSITION,
717 } vnet_error_disposition_t;
720 drop_catchup_trace (vlib_main_t * vm,
721 vlib_node_runtime_t * node, vlib_buffer_t * b)
723 /* Can we safely rewind the buffer? If not, fagedaboudit */
724 if (b->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
726 vnet_error_trace_t *t;
729 ethernet_header_t *eh;
732 t = vlib_add_trace (vm, node, b, sizeof (*t));
733 delta = vnet_buffer (b)->l2_hdr_offset - b->current_data;
734 vlib_buffer_advance (b, delta);
736 eh = vlib_buffer_get_current (b);
738 t->mactype = clib_net_to_host_u16 (eh->type);
739 t->details_valid = 1;
742 case ETHERNET_TYPE_IP4:
743 ip4 = (void *) (eh + 1);
744 t->details_valid = 2;
746 t->src.ip4.as_u32 = ip4->src_address.as_u32;
747 t->dst.ip4.as_u32 = ip4->dst_address.as_u32;
750 case ETHERNET_TYPE_IP6:
751 ip6 = (void *) (eh + 1);
752 t->details_valid = 2;
754 clib_memcpy_fast (t->src.as_u8, ip6->src_address.as_u8,
755 sizeof (ip6_address_t));
756 clib_memcpy_fast (t->dst.as_u8, ip6->dst_address.as_u8,
757 sizeof (ip6_address_t));
761 /* Dunno, do nothing, leave details_valid alone */
764 /* Restore current data (probably unnecessary) */
765 vlib_buffer_advance (b, -delta);
769 static_always_inline uword
770 interface_drop_punt (vlib_main_t * vm,
771 vlib_node_runtime_t * node,
772 vlib_frame_t * frame,
773 vnet_error_disposition_t disposition)
775 u32 *from, n_left, thread_index, *sw_if_index;
776 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
777 u32 sw_if_indices[VLIB_FRAME_SIZE];
778 vlib_simple_counter_main_t *cm;
779 u16 nexts[VLIB_FRAME_SIZE];
783 vnm = vnet_get_main ();
784 thread_index = vm->thread_index;
785 from = vlib_frame_vector_args (frame);
786 n_left = frame->n_vectors;
788 sw_if_index = sw_if_indices;
790 vlib_get_buffers (vm, from, bufs, n_left);
792 /* "trace add error-drop NNN?" */
793 if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node))))
795 /* If pkts aren't otherwise traced... */
796 if ((node->flags & VLIB_NODE_FLAG_TRACE) == 0)
798 /* Trace them from here */
799 node->flags |= VLIB_NODE_FLAG_TRACE;
800 while (n_trace && n_left)
802 vlib_trace_buffer (vm, node, 0 /* next_index */ ,
803 b[0], 0 /* follow chain */ );
805 * Here we have a wireshark dissector problem.
806 * Packets may be well-formed, or not. We
807 * must not blow chunks in any case.
809 * Try to produce trace records which will help
810 * folks understand what's going on.
812 drop_catchup_trace (vm, node, b[0]);
820 vlib_set_trace_count (vm, node, n_trace);
822 n_left = frame->n_vectors;
825 if (node->flags & VLIB_NODE_FLAG_TRACE)
826 interface_trace_buffers (vm, node, frame);
828 /* All going to drop regardless, this is just a counting exercise */
829 clib_memset (nexts, 0, sizeof (nexts));
831 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
832 (disposition == VNET_ERROR_DISPOSITION_PUNT
833 ? VNET_INTERFACE_COUNTER_PUNT
834 : VNET_INTERFACE_COUNTER_DROP));
836 /* collect the array of interfaces first ... */
841 /* Prefetch 8 ahead - there's not much going on in each iteration */
842 vlib_prefetch_buffer_header (b[4], LOAD);
843 vlib_prefetch_buffer_header (b[5], LOAD);
844 vlib_prefetch_buffer_header (b[6], LOAD);
845 vlib_prefetch_buffer_header (b[7], LOAD);
847 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
848 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
849 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
850 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
858 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
865 /* ... then count against them in blocks */
866 n_left = frame->n_vectors;
870 vnet_sw_interface_t *sw_if0;
873 off = frame->n_vectors - n_left;
875 sw_if_index = sw_if_indices + off;
877 count = clib_count_equal_u32 (sw_if_index, n_left);
880 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
882 /* Increment super-interface drop/punt counters for
884 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
885 if (sw_if0->sup_sw_if_index != sw_if_index[0])
886 vlib_increment_simple_counter
887 (cm, thread_index, sw_if0->sup_sw_if_index, count);
890 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
892 return frame->n_vectors;
896 pcap_drop_trace (vlib_main_t * vm,
897 vnet_interface_main_t * im,
898 vnet_pcap_t * pp, vlib_frame_t * f)
901 u32 n_left = f->n_vectors;
902 vlib_buffer_t *b0, *p1;
904 i16 save_current_data;
905 u16 save_current_length;
906 vlib_error_main_t *em = &vm->error_main;
910 from = vlib_frame_vector_args (f);
914 if (PREDICT_TRUE (n_left > 1))
916 p1 = vlib_get_buffer (vm, from[1]);
917 vlib_prefetch_buffer_header (p1, LOAD);
921 b0 = vlib_get_buffer (vm, bi0);
925 /* See if we're pointedly ignoring this specific error */
926 if (im->pcap_drop_filter_hash
927 && hash_get (im->pcap_drop_filter_hash, b0->error))
930 do_trace = (pp->pcap_sw_if_index == 0) ||
931 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
934 (do_trace == 0 && pp->filter_classify_table_index != ~0))
936 do_trace = vnet_is_packet_traced_inline
937 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
940 /* Trace all drops, or drops received on a specific interface */
943 save_current_data = b0->current_data;
944 save_current_length = b0->current_length;
947 * Typically, we'll need to rewind the buffer
948 * if l2_hdr_offset is valid, make sure to rewind to the start of
949 * the L2 header. This may not be the buffer start in case we pop-ed
951 * Otherwise, rewind to buffer start and hope for the best.
953 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
955 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
956 vlib_buffer_advance (b0,
957 vnet_buffer (b0)->l2_hdr_offset -
960 else if (b0->current_data > 0)
961 vlib_buffer_advance (b0, (word) - b0->current_data);
964 vlib_buffer_t *last = b0;
965 u32 error_node_index;
968 /* Length of the error string */
969 int error_string_len =
970 clib_strnlen (em->error_strings_heap[b0->error], 128);
972 /* Dig up the drop node */
973 error_node_index = vm->node_main.node_by_error[b0->error];
974 n = vlib_get_node (vm, error_node_index);
976 /* Length of full drop string, w/ "nodename: " prepended */
977 drop_string_len = error_string_len + vec_len (n->name) + 2;
979 /* Find the last buffer in the chain */
980 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
981 last = vlib_get_buffer (vm, last->next_buffer);
984 * Append <nodename>: <error-string> to the capture,
985 * only if we can do that without allocating a new buffer.
987 if (PREDICT_TRUE ((last->current_data + last->current_length)
988 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
991 clib_memcpy_fast (last->data + last->current_data +
992 last->current_length, n->name,
994 clib_memcpy_fast (last->data + last->current_data +
995 last->current_length + vec_len (n->name),
997 clib_memcpy_fast (last->data + last->current_data +
998 last->current_length + vec_len (n->name) +
999 2, em->error_strings_heap[b0->error],
1001 last->current_length += drop_string_len;
1002 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1003 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1004 pp->max_bytes_per_pkt);
1005 last->current_length -= drop_string_len;
1006 b0->current_data = save_current_data;
1007 b0->current_length = save_current_length;
1013 * Didn't have space in the last buffer, here's the dropped
1016 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1018 b0->current_data = save_current_data;
1019 b0->current_length = save_current_length;
1024 #ifndef CLIB_MARCH_VARIANT
1026 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1028 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1030 if (im->pcap_drop_filter_hash == 0)
1031 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1034 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1036 hash_unset (im->pcap_drop_filter_hash, error_index);
1038 #endif /* CLIB_MARCH_VARIANT */
1040 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1041 vlib_node_runtime_t * node,
1042 vlib_frame_t * frame)
1044 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1045 vnet_pcap_t *pp = &vlib_global_main.pcap;
1047 if (PREDICT_FALSE (pp->pcap_drop_enable))
1048 pcap_drop_trace (vm, im, pp, frame);
1050 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1053 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1054 vlib_node_runtime_t * node,
1055 vlib_frame_t * frame)
1057 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1061 VLIB_REGISTER_NODE (interface_drop) = {
1062 .name = "error-drop",
1063 .vector_size = sizeof (u32),
1064 .format_trace = format_vnet_error_trace,
1065 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1074 VLIB_REGISTER_NODE (interface_punt) = {
1075 .name = "error-punt",
1076 .vector_size = sizeof (u32),
1077 .format_trace = format_vnet_error_trace,
1078 .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
1087 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1088 .name = "interface-output",
1089 .vector_size = sizeof (u32),
1094 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1095 vlib_frame_t * from_frame)
1097 vnet_main_t *vnm = vnet_get_main ();
1098 u32 last_sw_if_index = ~0;
1099 vlib_frame_t *to_frame = 0;
1100 vnet_hw_interface_t *hw = 0;
1101 u32 *from, *to_next = 0;
1104 from = vlib_frame_vector_args (from_frame);
1105 n_left_from = from_frame->n_vectors;
1106 while (n_left_from > 0)
1115 b0 = vlib_get_buffer (vm, bi0);
1116 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1118 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1122 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1123 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1125 last_sw_if_index = sw_if_index0;
1126 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1127 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1128 to_next = vlib_frame_vector_args (to_frame);
1133 to_frame->n_vectors++;
1135 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1136 return from_frame->n_vectors;
1140 VLIB_REGISTER_NODE (interface_tx) = {
1141 .function = interface_tx_node_fn,
1142 .name = "interface-tx",
1143 .vector_size = sizeof (u32),
1150 VNET_FEATURE_ARC_INIT (interface_output, static) =
1152 .arc_name = "interface-output",
1153 .start_nodes = VNET_FEATURES (0),
1154 .last_in_arc = "interface-tx",
1155 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1158 VNET_FEATURE_INIT (span_tx, static) = {
1159 .arc_name = "interface-output",
1160 .node_name = "span-output",
1161 .runs_before = VNET_FEATURES ("interface-tx"),
1164 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1165 .arc_name = "interface-output",
1166 .node_name = "ipsec-if-output",
1167 .runs_before = VNET_FEATURES ("interface-tx"),
1170 VNET_FEATURE_INIT (interface_tx, static) = {
1171 .arc_name = "interface-output",
1172 .node_name = "interface-tx",
1177 #ifndef CLIB_MARCH_VARIANT
1179 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1183 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1186 if (hi->output_node_index == 0)
1189 next_index = vlib_node_add_next
1190 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1191 hi->output_node_index);
1192 hi->output_node_next_index = next_index;
1197 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1198 (vnet_per_buffer_interface_output_hw_interface_add_del);
1201 vnet_set_interface_output_node (vnet_main_t * vnm,
1202 u32 hw_if_index, u32 node_index)
1204 ASSERT (node_index);
1205 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1206 u32 next_index = vlib_node_add_next
1207 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1208 hi->output_node_next_index = next_index;
1209 hi->output_node_index = node_index;
1211 #endif /* CLIB_MARCH_VARIANT */
1214 * fd.io coding-style-patch-verification: ON
1217 * eval: (c-set-style "gnu")