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/ip/ip4.h>
43 #include <vnet/ip/ip6.h>
44 #include <vnet/udp/udp_packet.h>
45 #include <vnet/feature/feature.h>
53 u8 data[128 - 3 * sizeof (u32)];
55 interface_output_trace_t;
58 format_vnet_interface_output_trace (u8 * s, va_list * va)
60 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
61 vlib_node_t *node = va_arg (*va, vlib_node_t *);
62 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
63 vnet_main_t *vnm = vnet_get_main ();
64 vnet_sw_interface_t *si;
67 if (t->sw_if_index != (u32) ~ 0)
69 indent = format_get_indent (s);
71 if (pool_is_free_index
72 (vnm->interface_main.sw_interfaces, t->sw_if_index))
74 /* the interface may have been deleted by the time the trace is printed */
75 s = format (s, "sw_if_index: %d ", t->sw_if_index);
79 si = vnet_get_sw_interface (vnm, t->sw_if_index);
81 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
84 #define _(bit, name, v, x) \
85 if (v && (t->flags & VNET_BUFFER_F_##name)) \
86 s = format (s, "%s ", v);
87 foreach_vnet_buffer_flag
89 if (t->flags & VNET_BUFFER_F_GSO)
91 s = format (s, "\n%Ugso_sz %d gso_l4_hdr_sz %d",
92 format_white_space, indent + 2, t->gso_size,
96 format (s, "\n%U%U", format_white_space, indent,
97 node->format_buffer ? node->format_buffer : format_hex_bytes,
98 t->data, sizeof (t->data));
104 vnet_interface_output_trace (vlib_main_t * vm,
105 vlib_node_runtime_t * node,
106 vlib_frame_t * frame, uword n_buffers)
111 from = vlib_frame_vector_args (frame);
116 vlib_buffer_t *b0, *b1;
117 interface_output_trace_t *t0, *t1;
119 /* Prefetch next iteration. */
120 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
121 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
126 b0 = vlib_get_buffer (vm, bi0);
127 b1 = vlib_get_buffer (vm, bi1);
129 if (b0->flags & VLIB_BUFFER_IS_TRACED)
131 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
132 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
133 t0->flags = b0->flags;
134 t0->gso_size = vnet_buffer2 (b0)->gso_size;
135 t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
136 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
139 if (b1->flags & VLIB_BUFFER_IS_TRACED)
141 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
142 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
143 t1->flags = b1->flags;
144 t1->gso_size = vnet_buffer2 (b1)->gso_size;
145 t1->gso_l4_hdr_sz = vnet_buffer2 (b1)->gso_l4_hdr_sz;
146 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
157 interface_output_trace_t *t0;
161 b0 = vlib_get_buffer (vm, bi0);
163 if (b0->flags & VLIB_BUFFER_IS_TRACED)
165 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
166 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
167 t0->flags = b0->flags;
168 t0->gso_size = vnet_buffer2 (b0)->gso_size;
169 t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
170 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
178 static_always_inline void
179 calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
186 int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0;
187 int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0;
189 ASSERT (!(is_ip4 && is_ip6));
191 ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
192 ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
193 th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
194 uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
198 ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
199 if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
200 ip4->checksum = ip4_header_checksum (ip4);
201 if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
204 th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
206 if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
207 uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
212 if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
216 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
218 if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
222 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
226 b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
227 b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
228 b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
231 static_always_inline u16
232 tso_alloc_tx_bufs (vlib_main_t * vm,
233 vnet_interface_per_thread_data_t * ptd,
234 vlib_buffer_t * b0, u16 l4_hdr_sz)
236 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
237 u16 gso_size = vnet_buffer2 (b0)->gso_size;
238 u16 l234_sz = vnet_buffer (b0)->l4_hdr_offset + l4_hdr_sz;
239 /* rounded-up division */
240 u16 n_bufs = (n_bytes_b0 - l234_sz + (gso_size - 1)) / gso_size;
244 vec_validate (ptd->split_buffers, n_bufs - 1);
246 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
247 if (n_alloc < n_bufs)
249 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
255 static_always_inline void
256 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
257 u32 flags, u16 length)
259 nb0->current_data = 0;
260 nb0->total_length_not_including_first_buffer = 0;
261 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
262 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
263 clib_memcpy_fast (nb0->data, b0->data, length);
264 nb0->current_length = length;
267 static_always_inline void
268 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
269 vlib_buffer_t * b0, u16 template_data_sz,
270 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
271 u32 next_tcp_seq, u32 flags)
273 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
277 vlib_buffer_get_default_data_size (vm) - template_data_sz);
278 *p_dst_ptr = nb0->data + template_data_sz;
281 (tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset);
282 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
285 static_always_inline void
286 tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6)
288 u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
289 u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
290 ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset);
291 ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset);
292 tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset);
294 tcp->flags = tcp_flags;
297 ip6->payload_length =
298 clib_host_to_net_u16 (b0->current_length -
299 vnet_buffer (b0)->l4_hdr_offset);
302 clib_host_to_net_u16 (b0->current_length -
303 vnet_buffer (b0)->l3_hdr_offset);
307 * Allocate the necessary number of ptd->split_buffers,
308 * and segment the possibly chained buffer(s) from b0 into
311 * Return the cumulative number of bytes sent or zero
312 * if allocation failed.
315 static_always_inline u32
316 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
317 int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0,
321 int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4;
322 int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6;
323 ASSERT (is_ip4 || is_ip6);
324 ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID);
325 ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID);
326 ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
327 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
329 int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz;
330 u8 save_tcp_flags = 0;
331 u8 tcp_flags_no_fin_psh = 0;
332 u32 next_tcp_seq = 0;
335 (tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset);
336 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
337 /* store original flags for last packet and reset FIN and PSH */
338 save_tcp_flags = tcp->flags;
339 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
343 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
344 u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz;
345 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
346 next_tcp_seq += first_data_size;
348 if (PREDICT_FALSE (!tso_alloc_tx_bufs (vm, ptd, sb0, l4_hdr_sz)))
351 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
352 tso_init_buf_from_template_base (b0, sb0, default_bflags,
353 l4_hdr_sz + first_data_size);
355 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
358 /* Need to copy more segments */
359 u8 *src_ptr, *dst_ptr;
360 u16 src_left, dst_left;
361 /* current source buffer */
362 vlib_buffer_t *csb0 = sb0;
364 /* current dest buffer */
366 u16 dbi = 1; /* the buffer [0] is b0 */
368 src_ptr = sb0->data + l234_sz + first_data_size;
369 src_left = sb0->current_length - l234_sz - first_data_size;
370 b0->current_length = l234_sz + first_data_size;
372 tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
374 calc_checksums (vm, b0);
376 /* grab a second buffer and prepare the loop */
377 ASSERT (dbi < vec_len (ptd->split_buffers));
378 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
379 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
380 &dst_left, next_tcp_seq, default_bflags);
382 /* an arbitrary large number to catch the runaway loops */
384 while (total_src_left)
387 clib_panic ("infinite loop detected");
388 u16 bytes_to_copy = clib_min (src_left, dst_left);
390 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
392 src_left -= bytes_to_copy;
393 src_ptr += bytes_to_copy;
394 total_src_left -= bytes_to_copy;
395 dst_left -= bytes_to_copy;
396 dst_ptr += bytes_to_copy;
397 next_tcp_seq += bytes_to_copy;
398 cdb0->current_length += bytes_to_copy;
402 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
403 u32 next_bi = csb0->next_buffer;
405 /* init src to the next buffer in chain */
409 csb0 = vlib_get_buffer (vm, csbi0);
410 src_left = csb0->current_length;
411 src_ptr = csb0->data;
415 ASSERT (total_src_left == 0);
419 if (0 == dst_left && total_src_left)
422 calc_checksums (vm, cdb0);
423 n_tx_bytes += cdb0->current_length;
424 ASSERT (dbi < vec_len (ptd->split_buffers));
425 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
426 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
427 gso_size, &dst_ptr, &dst_left,
428 next_tcp_seq, default_bflags);
432 tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
434 calc_checksums (vm, cdb0);
436 n_tx_bytes += cdb0->current_length;
438 n_tx_bytes += b0->current_length;
442 static_always_inline void
443 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
444 vlib_node_runtime_t * node, u32 * pbi0,
447 u32 thread_index = vm->thread_index;
448 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
450 vlib_simple_counter_main_t *cm;
452 vec_elt_at_index (vnm->interface_main.sw_if_counters,
453 VNET_INTERFACE_COUNTER_TX_ERROR);
454 vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
456 vlib_error_drop_buffers (vm, node, pbi0,
457 /* buffer stride */ 1,
459 VNET_INTERFACE_OUTPUT_NEXT_DROP,
460 node->node_index, drop_error_code);
463 static_always_inline uword
464 vnet_interface_output_node_inline_gso (vlib_main_t * vm,
465 vlib_node_runtime_t * node,
466 vlib_frame_t * frame,
468 vnet_hw_interface_t * hi,
472 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
473 vnet_sw_interface_t *si;
474 u32 n_left_to_tx, *from, *from_end, *to_tx;
475 u32 n_bytes, n_buffers, n_packets;
476 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
477 u32 thread_index = vm->thread_index;
478 vnet_interface_main_t *im = &vnm->interface_main;
479 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
480 u32 current_config_index = ~0;
481 u8 arc = im->output_feature_arc_index;
482 vnet_interface_per_thread_data_t *ptd =
483 vec_elt_at_index (im->per_thread_data, thread_index);
485 n_buffers = frame->n_vectors;
487 if (node->flags & VLIB_NODE_FLAG_TRACE)
488 vnet_interface_output_trace (vm, node, frame, n_buffers);
490 from = vlib_frame_vector_args (frame);
493 return vlib_error_drop_buffers (vm, node, from,
494 /* buffer stride */ 1,
496 VNET_INTERFACE_OUTPUT_NEXT_DROP,
498 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
500 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
501 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
502 if (!(si->flags & (VNET_SW_INTERFACE_FLAG_ADMIN_UP |
503 VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) ||
504 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
506 vlib_simple_counter_main_t *cm;
508 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
509 VNET_INTERFACE_COUNTER_TX_ERROR);
510 vlib_increment_simple_counter (cm, thread_index,
511 rt->sw_if_index, n_buffers);
513 return vlib_error_drop_buffers (vm, node, from,
514 /* buffer stride */ 1,
516 VNET_INTERFACE_OUTPUT_NEXT_DROP,
518 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
521 from_end = from + n_buffers;
523 /* Total byte count of all buffers. */
527 /* interface-output feature arc handling */
528 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
530 vnet_feature_config_main_t *fcm;
531 fcm = vnet_feature_get_config_main (arc);
532 current_config_index = vnet_get_feature_config_index (arc,
534 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
538 while (from < from_end)
540 /* Get new next frame since previous incomplete frame may have less
541 than VNET_FRAME_SIZE vectors in it. */
542 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
544 while (from + 8 <= from_end && n_left_to_tx >= 4)
546 u32 bi0, bi1, bi2, bi3;
547 vlib_buffer_t *b0, *b1, *b2, *b3;
548 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
551 /* Prefetch next iteration. */
552 vlib_prefetch_buffer_with_index (vm, from[4], LOAD);
553 vlib_prefetch_buffer_with_index (vm, from[5], LOAD);
554 vlib_prefetch_buffer_with_index (vm, from[6], LOAD);
555 vlib_prefetch_buffer_with_index (vm, from[7], LOAD);
565 if (!do_segmentation)
572 b0 = vlib_get_buffer (vm, bi0);
573 b1 = vlib_get_buffer (vm, bi1);
574 b2 = vlib_get_buffer (vm, bi2);
575 b3 = vlib_get_buffer (vm, bi3);
579 or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
581 /* go to single loop if we need TSO segmentation */
582 if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
589 /* Be grumpy about zero length buffers for benefit of
590 driver tx function. */
591 ASSERT (b0->current_length > 0);
592 ASSERT (b1->current_length > 0);
593 ASSERT (b2->current_length > 0);
594 ASSERT (b3->current_length > 0);
596 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
597 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1);
598 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b2);
599 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b3);
600 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
601 tx_swif1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
602 tx_swif2 = vnet_buffer (b2)->sw_if_index[VLIB_TX];
603 tx_swif3 = vnet_buffer (b3)->sw_if_index[VLIB_TX];
605 n_bytes += n_bytes_b0 + n_bytes_b1;
606 n_bytes += n_bytes_b2 + n_bytes_b3;
609 if (PREDICT_FALSE (current_config_index != ~0))
611 vnet_buffer (b0)->feature_arc_index = arc;
612 vnet_buffer (b1)->feature_arc_index = arc;
613 vnet_buffer (b2)->feature_arc_index = arc;
614 vnet_buffer (b3)->feature_arc_index = arc;
615 b0->current_config_index = current_config_index;
616 b1->current_config_index = current_config_index;
617 b2->current_config_index = current_config_index;
618 b3->current_config_index = current_config_index;
621 /* update vlan subif tx counts, if required */
622 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
624 vlib_increment_combined_counter (im->combined_sw_if_counters +
625 VNET_INTERFACE_COUNTER_TX,
626 thread_index, tx_swif0, 1,
630 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
633 vlib_increment_combined_counter (im->combined_sw_if_counters +
634 VNET_INTERFACE_COUNTER_TX,
635 thread_index, tx_swif1, 1,
639 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
642 vlib_increment_combined_counter (im->combined_sw_if_counters +
643 VNET_INTERFACE_COUNTER_TX,
644 thread_index, tx_swif2, 1,
647 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
650 vlib_increment_combined_counter (im->combined_sw_if_counters +
651 VNET_INTERFACE_COUNTER_TX,
652 thread_index, tx_swif3, 1,
656 if (!do_segmentation)
657 or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
662 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
663 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
664 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
666 calc_checksums (vm, b0);
667 calc_checksums (vm, b1);
668 calc_checksums (vm, b2);
669 calc_checksums (vm, b3);
674 while (from + 1 <= from_end && n_left_to_tx >= 1)
686 b0 = vlib_get_buffer (vm, bi0);
688 /* Be grumpy about zero length buffers for benefit of
689 driver tx function. */
690 ASSERT (b0->current_length > 0);
692 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
693 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
694 n_bytes += n_bytes_b0;
697 if (PREDICT_FALSE (current_config_index != ~0))
699 vnet_buffer (b0)->feature_arc_index = arc;
700 b0->current_config_index = current_config_index;
705 if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_GSO))
708 * Undo the enqueue of the b0 - it is not going anywhere,
709 * and will be freed either after it's segmented or
710 * when dropped, if there is no buffers to segment into.
714 /* undo the counting. */
715 n_bytes -= n_bytes_b0;
721 tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b0,
724 if (PREDICT_FALSE (n_tx_bytes == 0))
726 drop_one_buffer_and_count (vm, vnm, node, from - 1,
727 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
731 u16 n_tx_bufs = vec_len (ptd->split_buffers);
732 u32 *from_tx_seg = ptd->split_buffers;
734 while (n_tx_bufs > 0)
736 if (n_tx_bufs >= n_left_to_tx)
738 while (n_left_to_tx > 0)
740 to_tx[0] = from_tx_seg[0];
747 vlib_put_next_frame (vm, node, next_index,
749 vlib_get_new_next_frame (vm, node, next_index,
750 to_tx, n_left_to_tx);
754 while (n_tx_bufs > 0)
756 to_tx[0] = from_tx_seg[0];
765 n_bytes += n_tx_bytes;
766 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
769 vlib_increment_combined_counter
770 (im->combined_sw_if_counters +
771 VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
772 _vec_len (ptd->split_buffers), n_tx_bytes);
774 /* The buffers were enqueued. Reset the length */
775 _vec_len (ptd->split_buffers) = 0;
776 /* Free the now segmented buffer */
777 vlib_buffer_free_one (vm, bi0);
782 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
785 vlib_increment_combined_counter (im->combined_sw_if_counters +
786 VNET_INTERFACE_COUNTER_TX,
787 thread_index, tx_swif0, 1,
792 calc_checksums (vm, b0);
795 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
798 /* Update main interface stats. */
799 vlib_increment_combined_counter (im->combined_sw_if_counters
800 + VNET_INTERFACE_COUNTER_TX,
802 rt->sw_if_index, n_packets, n_bytes);
806 static_always_inline void vnet_interface_pcap_tx_trace
807 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
808 int sw_if_index_from_buffer)
810 u32 n_left_from, *from;
813 if (PREDICT_TRUE (vm->pcap[VLIB_TX].pcap_enable == 0))
816 if (sw_if_index_from_buffer == 0)
818 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
819 sw_if_index = rt->sw_if_index;
824 n_left_from = frame->n_vectors;
825 from = vlib_frame_vector_args (frame);
827 while (n_left_from > 0)
830 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
832 if (sw_if_index_from_buffer)
833 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
835 if (vm->pcap[VLIB_TX].pcap_sw_if_index == 0 ||
836 vm->pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
837 pcap_add_buffer (&vm->pcap[VLIB_TX].pcap_main, vm, bi0, 512);
843 static_always_inline uword
844 vnet_interface_output_node_inline (vlib_main_t * vm,
845 vlib_node_runtime_t * node,
846 vlib_frame_t * frame, vnet_main_t * vnm,
847 vnet_hw_interface_t * hi,
850 vnet_interface_pcap_tx_trace (vm, node, frame,
851 0 /* sw_if_index_from_buffer */ );
854 * The 3-headed "if" is here because we want to err on the side
855 * of not impacting the non-GSO performance - so for the more
856 * common case of no GSO interfaces we want to prevent the
857 * segmentation codepath from being there altogether.
859 if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
860 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
862 /* do_segmentation */ 0);
863 else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
864 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
866 /* do_segmentation */ 0);
868 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
870 /* do_segmentation */ 1);
874 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
875 vlib_frame_t * frame)
877 vnet_main_t *vnm = vnet_get_main ();
878 vnet_hw_interface_t *hi;
879 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
880 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
882 vnet_interface_pcap_tx_trace (vm, node, frame,
883 0 /* sw_if_index_from_buffer */ );
885 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
886 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
887 /* do_tx_offloads */ 0);
889 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
890 /* do_tx_offloads */ 1);
893 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
895 vnet_per_buffer_interface_output (vlib_main_t * vm,
896 vlib_node_runtime_t * node,
897 vlib_frame_t * frame)
899 vnet_main_t *vnm = vnet_get_main ();
900 u32 n_left_to_next, *from, *to_next;
901 u32 n_left_from, next_index;
903 vnet_interface_pcap_tx_trace (vm, node, frame,
904 1 /* sw_if_index_from_buffer */ );
906 n_left_from = frame->n_vectors;
908 from = vlib_frame_vector_args (frame);
909 next_index = node->cached_next_index;
911 while (n_left_from > 0)
913 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
915 while (n_left_from >= 4 && n_left_to_next >= 2)
917 u32 bi0, bi1, next0, next1;
918 vlib_buffer_t *b0, *b1;
919 vnet_hw_interface_t *hi0, *hi1;
921 /* Prefetch next iteration. */
922 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
923 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
934 b0 = vlib_get_buffer (vm, bi0);
935 b1 = vlib_get_buffer (vm, bi1);
938 vnet_get_sup_hw_interface (vnm,
939 vnet_buffer (b0)->sw_if_index
942 vnet_get_sup_hw_interface (vnm,
943 vnet_buffer (b1)->sw_if_index
946 next0 = hi0->output_node_next_index;
947 next1 = hi1->output_node_next_index;
949 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
950 n_left_to_next, bi0, bi1, next0,
954 while (n_left_from > 0 && n_left_to_next > 0)
958 vnet_hw_interface_t *hi0;
967 b0 = vlib_get_buffer (vm, bi0);
970 vnet_get_sup_hw_interface (vnm,
971 vnet_buffer (b0)->sw_if_index
974 next0 = hi0->output_node_next_index;
976 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
977 n_left_to_next, bi0, next0);
980 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
983 return frame->n_vectors;
987 counter_index (vlib_main_t * vm, vlib_error_t e)
992 ni = vlib_error_get_node (e);
993 n = vlib_get_node (vm, ni);
995 ci = vlib_error_get_code (e);
996 ASSERT (ci < n->n_errors);
998 ci += n->error_heap_index;
1004 format_vnet_error_trace (u8 * s, va_list * va)
1006 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
1007 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
1008 vlib_error_t *e = va_arg (*va, vlib_error_t *);
1009 vlib_node_t *error_node;
1010 vlib_error_main_t *em = &vm->error_main;
1013 error_node = vlib_get_node (vm, vlib_error_get_node (e[0]));
1014 i = counter_index (vm, e[0]);
1015 s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]);
1021 trace_errors_with_buffers (vlib_main_t * vm,
1022 vlib_node_runtime_t * node, vlib_frame_t * frame)
1024 u32 n_left, *buffers;
1026 buffers = vlib_frame_vector_args (frame);
1027 n_left = frame->n_vectors;
1032 vlib_buffer_t *b0, *b1;
1033 vlib_error_t *t0, *t1;
1035 /* Prefetch next iteration. */
1036 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
1037 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
1042 b0 = vlib_get_buffer (vm, bi0);
1043 b1 = vlib_get_buffer (vm, bi1);
1045 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1047 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1050 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1052 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1067 b0 = vlib_get_buffer (vm, bi0);
1069 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1071 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1080 validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index)
1082 uword node_index = vlib_error_get_node (e[0]);
1083 uword code = vlib_error_get_code (e[0]);
1086 if (node_index >= vec_len (vm->node_main.nodes))
1087 return format (0, "[%d], node index out of range 0x%x, error 0x%x",
1088 index, node_index, e[0]);
1090 n = vlib_get_node (vm, node_index);
1091 if (code >= n->n_errors)
1092 return format (0, "[%d], code %d out of range for node %v",
1093 index, code, n->name);
1099 validate_error_frame (vlib_main_t * vm,
1100 vlib_node_runtime_t * node, vlib_frame_t * f)
1102 u32 *buffers = vlib_frame_vector_args (f);
1107 for (i = 0; i < f->n_vectors; i++)
1109 b = vlib_get_buffer (vm, buffers[i]);
1110 msg = validate_error (vm, &b->error, i);
1120 VNET_ERROR_DISPOSITION_DROP,
1121 VNET_ERROR_DISPOSITION_PUNT,
1122 VNET_ERROR_N_DISPOSITION,
1123 } vnet_error_disposition_t;
1126 do_packet (vlib_main_t * vm, vlib_error_t a)
1128 vlib_error_main_t *em = &vm->error_main;
1129 u32 i = counter_index (vm, a);
1130 em->counters[i] += 1;
1131 vlib_error_elog_count (vm, i, 1);
1134 static_always_inline uword
1135 process_drop_punt (vlib_main_t * vm,
1136 vlib_node_runtime_t * node,
1137 vlib_frame_t * frame, vnet_error_disposition_t disposition)
1139 vnet_main_t *vnm = vnet_get_main ();
1140 vlib_error_main_t *em = &vm->error_main;
1141 u32 *buffers, *first_buffer;
1142 vlib_error_t current_error;
1143 u32 current_counter_index, n_errors_left;
1144 u32 current_sw_if_index, n_errors_current_sw_if_index;
1145 u64 current_counter;
1146 vlib_simple_counter_main_t *cm;
1147 u32 thread_index = vm->thread_index;
1149 static vlib_error_t memory[VNET_ERROR_N_DISPOSITION];
1150 static char memory_init[VNET_ERROR_N_DISPOSITION];
1152 buffers = vlib_frame_vector_args (frame);
1153 first_buffer = buffers;
1156 vlib_buffer_t *b = vlib_get_buffer (vm, first_buffer[0]);
1158 if (!memory_init[disposition])
1160 memory_init[disposition] = 1;
1161 memory[disposition] = b->error;
1164 current_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
1165 n_errors_current_sw_if_index = 0;
1168 current_error = memory[disposition];
1169 current_counter_index = counter_index (vm, memory[disposition]);
1170 current_counter = em->counters[current_counter_index];
1172 if (node->flags & VLIB_NODE_FLAG_TRACE)
1173 trace_errors_with_buffers (vm, node, frame);
1175 n_errors_left = frame->n_vectors;
1176 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1177 (disposition == VNET_ERROR_DISPOSITION_PUNT
1178 ? VNET_INTERFACE_COUNTER_PUNT
1179 : VNET_INTERFACE_COUNTER_DROP));
1181 while (n_errors_left >= 2)
1183 vlib_buffer_t *b0, *b1;
1184 vnet_sw_interface_t *sw_if0, *sw_if1;
1185 vlib_error_t e0, e1;
1187 u32 sw_if_index0, sw_if_index1;
1195 b0 = vlib_get_buffer (vm, bi0);
1196 b1 = vlib_get_buffer (vm, bi1);
1201 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1202 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
1204 /* Speculate that sw_if_index == sw_if_index[01]. */
1205 n_errors_current_sw_if_index += 2;
1207 /* Speculatively assume all 2 (node, code) pairs are equal
1208 to current (node, code). */
1209 current_counter += 2;
1211 if (PREDICT_FALSE (e0 != current_error
1212 || e1 != current_error
1213 || sw_if_index0 != current_sw_if_index
1214 || sw_if_index1 != current_sw_if_index))
1216 current_counter -= 2;
1217 n_errors_current_sw_if_index -= 2;
1219 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
1220 vlib_increment_simple_counter (cm, thread_index, sw_if_index1, 1);
1222 /* Increment super-interface drop/punt counters for
1224 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
1225 vlib_increment_simple_counter
1226 (cm, thread_index, sw_if0->sup_sw_if_index,
1227 sw_if0->sup_sw_if_index != sw_if_index0);
1229 sw_if1 = vnet_get_sw_interface (vnm, sw_if_index1);
1230 vlib_increment_simple_counter
1231 (cm, thread_index, sw_if1->sup_sw_if_index,
1232 sw_if1->sup_sw_if_index != sw_if_index1);
1234 em->counters[current_counter_index] = current_counter;
1238 /* For 2 repeated errors, change current error. */
1239 if (e0 == e1 && e1 != current_error)
1242 current_counter_index = counter_index (vm, e0);
1244 current_counter = em->counters[current_counter_index];
1248 while (n_errors_left >= 1)
1251 vnet_sw_interface_t *sw_if0;
1253 u32 bi0, sw_if_index0;
1259 current_counter += 1;
1261 b0 = vlib_get_buffer (vm, bi0);
1264 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1266 /* Increment drop/punt counters. */
1267 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
1269 /* Increment super-interface drop/punt counters for sub-interfaces. */
1270 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
1271 vlib_increment_simple_counter (cm, thread_index,
1272 sw_if0->sup_sw_if_index,
1273 sw_if0->sup_sw_if_index != sw_if_index0);
1275 if (PREDICT_FALSE (e0 != current_error))
1277 current_counter -= 1;
1279 vlib_error_elog_count (vm, current_counter_index,
1281 - em->counters[current_counter_index]));
1283 em->counters[current_counter_index] = current_counter;
1287 current_counter_index = counter_index (vm, e0);
1288 current_counter = em->counters[current_counter_index];
1292 if (n_errors_current_sw_if_index > 0)
1294 vnet_sw_interface_t *si;
1296 vlib_increment_simple_counter (cm, thread_index, current_sw_if_index,
1297 n_errors_current_sw_if_index);
1299 si = vnet_get_sw_interface (vnm, current_sw_if_index);
1300 if (si->sup_sw_if_index != current_sw_if_index)
1301 vlib_increment_simple_counter (cm, thread_index, si->sup_sw_if_index,
1302 n_errors_current_sw_if_index);
1305 vlib_error_elog_count (vm, current_counter_index,
1307 - em->counters[current_counter_index]));
1309 /* Return cached counter. */
1310 em->counters[current_counter_index] = current_counter;
1312 /* Save memory for next iteration. */
1313 memory[disposition] = current_error;
1315 if (disposition == VNET_ERROR_DISPOSITION_DROP || !vm->os_punt_frame)
1317 vlib_buffer_free (vm, first_buffer, frame->n_vectors);
1319 /* If there is no punt function, free the frame as well. */
1320 if (disposition == VNET_ERROR_DISPOSITION_PUNT && !vm->os_punt_frame)
1321 vlib_frame_free (vm, node, frame);
1324 vm->os_punt_frame (vm, node, frame);
1326 return frame->n_vectors;
1330 pcap_drop_trace (vlib_main_t * vm,
1331 vnet_interface_main_t * im, vlib_frame_t * f)
1334 u32 n_left = f->n_vectors;
1335 vlib_buffer_t *b0, *p1;
1337 i16 save_current_data;
1338 u16 save_current_length;
1340 from = vlib_frame_vector_args (f);
1344 if (PREDICT_TRUE (n_left > 1))
1346 p1 = vlib_get_buffer (vm, from[1]);
1347 vlib_prefetch_buffer_header (p1, LOAD);
1351 b0 = vlib_get_buffer (vm, bi0);
1355 /* See if we're pointedly ignoring this specific error */
1356 if (im->pcap_drop_filter_hash
1357 && hash_get (im->pcap_drop_filter_hash, b0->error))
1360 /* Trace all drops, or drops received on a specific interface */
1361 if (im->pcap_sw_if_index == 0 ||
1362 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1364 save_current_data = b0->current_data;
1365 save_current_length = b0->current_length;
1368 * Typically, we'll need to rewind the buffer
1370 if (b0->current_data > 0)
1371 vlib_buffer_advance (b0, (word) - b0->current_data);
1373 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1375 b0->current_data = save_current_data;
1376 b0->current_length = save_current_length;
1382 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1384 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1386 if (im->pcap_drop_filter_hash == 0)
1387 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1390 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1392 hash_unset (im->pcap_drop_filter_hash, error_index);
1396 process_drop (vlib_main_t * vm,
1397 vlib_node_runtime_t * node, vlib_frame_t * frame)
1399 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1401 if (PREDICT_FALSE (im->drop_pcap_enable))
1402 pcap_drop_trace (vm, im, frame);
1404 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1408 process_punt (vlib_main_t * vm,
1409 vlib_node_runtime_t * node, vlib_frame_t * frame)
1411 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1415 VLIB_REGISTER_NODE (drop_buffers,static) = {
1416 .function = process_drop,
1417 .name = "error-drop",
1418 .flags = VLIB_NODE_FLAG_IS_DROP,
1419 .vector_size = sizeof (u32),
1420 .format_trace = format_vnet_error_trace,
1421 .validate_frame = validate_error_frame,
1425 VLIB_NODE_FUNCTION_MULTIARCH (drop_buffers, process_drop);
1428 VLIB_REGISTER_NODE (punt_buffers,static) = {
1429 .function = process_punt,
1430 .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH
1431 | VLIB_NODE_FLAG_IS_PUNT),
1432 .name = "error-punt",
1433 .vector_size = sizeof (u32),
1434 .format_trace = format_vnet_error_trace,
1435 .validate_frame = validate_error_frame,
1439 VLIB_NODE_FUNCTION_MULTIARCH (punt_buffers, process_punt);
1442 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = {
1443 .function = vnet_per_buffer_interface_output,
1444 .name = "interface-output",
1445 .vector_size = sizeof (u32),
1449 /* Convenience node to drop a vector of buffers with a "misc error". */
1451 misc_drop_buffers (vlib_main_t * vm,
1452 vlib_node_runtime_t * node, vlib_frame_t * frame)
1454 return vlib_error_drop_buffers (vm, node, vlib_frame_vector_args (frame),
1455 /* buffer stride */ 1,
1462 static char *misc_drop_buffers_error_strings[] = {
1463 [0] = "misc. errors",
1467 VLIB_REGISTER_NODE (misc_drop_buffers_node,static) = {
1468 .function = misc_drop_buffers,
1469 .name = "misc-drop-buffers",
1470 .vector_size = sizeof (u32),
1476 .error_strings = misc_drop_buffers_error_strings,
1480 VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node,
1481 vnet_per_buffer_interface_output);
1484 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1485 vlib_frame_t * from_frame)
1487 vnet_main_t *vnm = vnet_get_main ();
1488 u32 last_sw_if_index = ~0;
1489 vlib_frame_t *to_frame = 0;
1490 vnet_hw_interface_t *hw = 0;
1491 u32 *from, *to_next = 0;
1494 from = vlib_frame_vector_args (from_frame);
1495 n_left_from = from_frame->n_vectors;
1496 while (n_left_from > 0)
1505 b0 = vlib_get_buffer (vm, bi0);
1506 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1508 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1512 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1513 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1515 last_sw_if_index = sw_if_index0;
1516 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1517 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1518 to_next = vlib_frame_vector_args (to_frame);
1523 to_frame->n_vectors++;
1525 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1526 return from_frame->n_vectors;
1530 VLIB_REGISTER_NODE (interface_tx, static) = {
1531 .function = interface_tx_node_fn,
1532 .name = "interface-tx",
1533 .vector_size = sizeof (u32),
1540 VNET_FEATURE_ARC_INIT (interface_output, static) =
1542 .arc_name = "interface-output",
1543 .start_nodes = VNET_FEATURES (0),
1544 .last_in_arc = "interface-tx",
1545 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1548 VNET_FEATURE_INIT (span_tx, static) = {
1549 .arc_name = "interface-output",
1550 .node_name = "span-output",
1551 .runs_before = VNET_FEATURES ("interface-tx"),
1554 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1555 .arc_name = "interface-output",
1556 .node_name = "ipsec-if-output",
1557 .runs_before = VNET_FEATURES ("interface-tx"),
1560 VNET_FEATURE_INIT (interface_tx, static) = {
1561 .arc_name = "interface-output",
1562 .node_name = "interface-tx",
1568 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1572 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1575 if (hi->output_node_index == 0)
1578 next_index = vlib_node_add_next
1579 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1580 hi->output_node_index);
1581 hi->output_node_next_index = next_index;
1586 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1587 (vnet_per_buffer_interface_output_hw_interface_add_del);
1590 vnet_set_interface_output_node (vnet_main_t * vnm,
1591 u32 hw_if_index, u32 node_index)
1593 ASSERT (node_index);
1594 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1595 u32 next_index = vlib_node_add_next
1596 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1597 hi->output_node_next_index = next_index;
1598 hi->output_node_index = node_index;
1601 static clib_error_t *
1602 pcap_drop_trace_command_fn (vlib_main_t * vm,
1603 unformat_input_t * input,
1604 vlib_cli_command_t * cmd)
1606 vnet_main_t *vnm = vnet_get_main ();
1607 vnet_interface_main_t *im = &vnm->interface_main;
1611 clib_error_t *error = 0;
1613 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1615 if (unformat (input, "on"))
1617 if (im->drop_pcap_enable == 0)
1619 if (im->pcap_filename == 0)
1620 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1622 clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1623 im->pcap_main.file_name = (char *) im->pcap_filename;
1624 im->pcap_main.n_packets_to_capture = 100;
1625 if (im->pcap_pkts_to_capture)
1626 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1628 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1629 im->drop_pcap_enable = 1;
1631 vlib_cli_output (vm, "pcap drop capture on...");
1635 vlib_cli_output (vm, "pcap drop capture already on...");
1639 else if (unformat (input, "off"))
1643 if (im->drop_pcap_enable)
1645 vlib_cli_output (vm, "captured %d pkts...",
1646 im->pcap_main.n_packets_captured);
1647 if (im->pcap_main.n_packets_captured)
1649 im->pcap_main.n_packets_to_capture =
1650 im->pcap_main.n_packets_captured;
1651 error = pcap_write (&im->pcap_main);
1653 clib_error_report (error);
1655 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1660 vlib_cli_output (vm, "pcap drop capture already off...");
1663 im->drop_pcap_enable = 0;
1665 else if (unformat (input, "max %d", &max))
1667 im->pcap_pkts_to_capture = max;
1671 else if (unformat (input, "intfc %U",
1672 unformat_vnet_sw_interface, vnm,
1673 &im->pcap_sw_if_index))
1675 else if (unformat (input, "intfc any"))
1677 im->pcap_sw_if_index = 0;
1680 else if (unformat (input, "file %s", &filename))
1682 u8 *chroot_filename;
1683 /* Brain-police user path input */
1684 if (strstr ((char *) filename, "..")
1685 || index ((char *) filename, '/'))
1687 vlib_cli_output (vm, "illegal characters in filename '%s'",
1692 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1693 vec_free (filename);
1695 if (im->pcap_filename)
1696 vec_free (im->pcap_filename);
1697 im->pcap_filename = chroot_filename;
1698 im->pcap_main.file_name = (char *) im->pcap_filename;
1701 else if (unformat (input, "status"))
1703 if (im->drop_pcap_enable == 0)
1705 vlib_cli_output (vm, "pcap drop capture is off...");
1709 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1710 im->pcap_main.n_packets_captured,
1711 im->pcap_main.n_packets_to_capture);
1720 return clib_error_return (0, "unknown input `%U'",
1721 format_unformat_error, input);
1727 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1728 .path = "pcap drop trace",
1730 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1731 .function = pcap_drop_trace_command_fn,
1736 * fd.io coding-style-patch-verification: ON
1739 * eval: (c-set-style "gnu")