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)
386 ASSERT (nloops-- > 0);
387 u16 bytes_to_copy = clib_min (src_left, dst_left);
389 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
391 src_left -= bytes_to_copy;
392 src_ptr += bytes_to_copy;
393 total_src_left -= bytes_to_copy;
394 dst_left -= bytes_to_copy;
395 dst_ptr += bytes_to_copy;
396 next_tcp_seq += bytes_to_copy;
397 cdb0->current_length += bytes_to_copy;
401 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
402 u32 next_bi = csb0->next_buffer;
404 /* init src to the next buffer in chain */
408 csb0 = vlib_get_buffer (vm, csbi0);
409 src_left = csb0->current_length;
410 src_ptr = csb0->data;
414 ASSERT (total_src_left == 0);
418 if (0 == dst_left && total_src_left)
421 calc_checksums (vm, cdb0);
422 n_tx_bytes += cdb0->current_length;
423 ASSERT (dbi < vec_len (ptd->split_buffers));
424 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
425 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
426 gso_size, &dst_ptr, &dst_left,
427 next_tcp_seq, default_bflags);
431 tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
433 calc_checksums (vm, cdb0);
435 n_tx_bytes += cdb0->current_length;
437 n_tx_bytes += b0->current_length;
441 static_always_inline void
442 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
443 vlib_node_runtime_t * node, u32 * pbi0,
446 u32 thread_index = vm->thread_index;
447 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
449 vlib_simple_counter_main_t *cm;
451 vec_elt_at_index (vnm->interface_main.sw_if_counters,
452 VNET_INTERFACE_COUNTER_TX_ERROR);
453 vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
455 vlib_error_drop_buffers (vm, node, pbi0,
456 /* buffer stride */ 1,
458 VNET_INTERFACE_OUTPUT_NEXT_DROP,
459 node->node_index, drop_error_code);
462 static_always_inline uword
463 vnet_interface_output_node_inline_gso (vlib_main_t * vm,
464 vlib_node_runtime_t * node,
465 vlib_frame_t * frame,
467 vnet_hw_interface_t * hi,
471 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
472 vnet_sw_interface_t *si;
473 u32 n_left_to_tx, *from, *from_end, *to_tx;
474 u32 n_bytes, n_buffers, n_packets;
475 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
476 u32 thread_index = vm->thread_index;
477 vnet_interface_main_t *im = &vnm->interface_main;
478 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
479 u32 current_config_index = ~0;
480 u8 arc = im->output_feature_arc_index;
481 vnet_interface_per_thread_data_t *ptd =
482 vec_elt_at_index (im->per_thread_data, thread_index);
484 n_buffers = frame->n_vectors;
486 if (node->flags & VLIB_NODE_FLAG_TRACE)
487 vnet_interface_output_trace (vm, node, frame, n_buffers);
489 from = vlib_frame_vector_args (frame);
492 return vlib_error_drop_buffers (vm, node, from,
493 /* buffer stride */ 1,
495 VNET_INTERFACE_OUTPUT_NEXT_DROP,
497 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
499 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
500 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
501 if (!(si->flags & (VNET_SW_INTERFACE_FLAG_ADMIN_UP |
502 VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) ||
503 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
505 vlib_simple_counter_main_t *cm;
507 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
508 VNET_INTERFACE_COUNTER_TX_ERROR);
509 vlib_increment_simple_counter (cm, thread_index,
510 rt->sw_if_index, n_buffers);
512 return vlib_error_drop_buffers (vm, node, from,
513 /* buffer stride */ 1,
515 VNET_INTERFACE_OUTPUT_NEXT_DROP,
517 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
520 from_end = from + n_buffers;
522 /* Total byte count of all buffers. */
526 /* interface-output feature arc handling */
527 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
529 vnet_feature_config_main_t *fcm;
530 fcm = vnet_feature_get_config_main (arc);
531 current_config_index = vnet_get_feature_config_index (arc,
533 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
537 while (from < from_end)
539 /* Get new next frame since previous incomplete frame may have less
540 than VNET_FRAME_SIZE vectors in it. */
541 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
543 while (from + 8 <= from_end && n_left_to_tx >= 4)
545 u32 bi0, bi1, bi2, bi3;
546 vlib_buffer_t *b0, *b1, *b2, *b3;
547 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
550 /* Prefetch next iteration. */
551 vlib_prefetch_buffer_with_index (vm, from[4], LOAD);
552 vlib_prefetch_buffer_with_index (vm, from[5], LOAD);
553 vlib_prefetch_buffer_with_index (vm, from[6], LOAD);
554 vlib_prefetch_buffer_with_index (vm, from[7], LOAD);
564 if (!do_segmentation)
571 b0 = vlib_get_buffer (vm, bi0);
572 b1 = vlib_get_buffer (vm, bi1);
573 b2 = vlib_get_buffer (vm, bi2);
574 b3 = vlib_get_buffer (vm, bi3);
578 or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
580 /* go to single loop if we need TSO segmentation */
581 if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
588 /* Be grumpy about zero length buffers for benefit of
589 driver tx function. */
590 ASSERT (b0->current_length > 0);
591 ASSERT (b1->current_length > 0);
592 ASSERT (b2->current_length > 0);
593 ASSERT (b3->current_length > 0);
595 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
596 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1);
597 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b2);
598 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b3);
599 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
600 tx_swif1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
601 tx_swif2 = vnet_buffer (b2)->sw_if_index[VLIB_TX];
602 tx_swif3 = vnet_buffer (b3)->sw_if_index[VLIB_TX];
604 n_bytes += n_bytes_b0 + n_bytes_b1;
605 n_bytes += n_bytes_b2 + n_bytes_b3;
608 if (PREDICT_FALSE (current_config_index != ~0))
610 vnet_buffer (b0)->feature_arc_index = arc;
611 vnet_buffer (b1)->feature_arc_index = arc;
612 vnet_buffer (b2)->feature_arc_index = arc;
613 vnet_buffer (b3)->feature_arc_index = arc;
614 b0->current_config_index = current_config_index;
615 b1->current_config_index = current_config_index;
616 b2->current_config_index = current_config_index;
617 b3->current_config_index = current_config_index;
620 /* update vlan subif tx counts, if required */
621 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
623 vlib_increment_combined_counter (im->combined_sw_if_counters +
624 VNET_INTERFACE_COUNTER_TX,
625 thread_index, tx_swif0, 1,
629 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
632 vlib_increment_combined_counter (im->combined_sw_if_counters +
633 VNET_INTERFACE_COUNTER_TX,
634 thread_index, tx_swif1, 1,
638 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
641 vlib_increment_combined_counter (im->combined_sw_if_counters +
642 VNET_INTERFACE_COUNTER_TX,
643 thread_index, tx_swif2, 1,
646 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
649 vlib_increment_combined_counter (im->combined_sw_if_counters +
650 VNET_INTERFACE_COUNTER_TX,
651 thread_index, tx_swif3, 1,
655 if (!do_segmentation)
656 or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
661 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
662 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
663 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
665 calc_checksums (vm, b0);
666 calc_checksums (vm, b1);
667 calc_checksums (vm, b2);
668 calc_checksums (vm, b3);
673 while (from + 1 <= from_end && n_left_to_tx >= 1)
685 b0 = vlib_get_buffer (vm, bi0);
687 /* Be grumpy about zero length buffers for benefit of
688 driver tx function. */
689 ASSERT (b0->current_length > 0);
691 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
692 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
693 n_bytes += n_bytes_b0;
696 if (PREDICT_FALSE (current_config_index != ~0))
698 vnet_buffer (b0)->feature_arc_index = arc;
699 b0->current_config_index = current_config_index;
704 if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_GSO))
707 * Undo the enqueue of the b0 - it is not going anywhere,
708 * and will be freed either after it's segmented or
709 * when dropped, if there is no buffers to segment into.
713 /* undo the counting. */
714 n_bytes -= n_bytes_b0;
720 tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b0,
723 if (PREDICT_FALSE (n_tx_bytes == 0))
725 drop_one_buffer_and_count (vm, vnm, node, from - 1,
726 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
730 u16 n_tx_bufs = vec_len (ptd->split_buffers);
731 u32 *from_tx_seg = ptd->split_buffers;
733 while (n_tx_bufs > 0)
735 if (n_tx_bufs >= n_left_to_tx)
737 while (n_left_to_tx > 0)
739 to_tx[0] = from_tx_seg[0];
746 vlib_put_next_frame (vm, node, next_index,
748 vlib_get_new_next_frame (vm, node, next_index,
749 to_tx, n_left_to_tx);
753 while (n_tx_bufs > 0)
755 to_tx[0] = from_tx_seg[0];
764 n_bytes += n_tx_bytes;
765 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
768 vlib_increment_combined_counter
769 (im->combined_sw_if_counters +
770 VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
771 _vec_len (ptd->split_buffers), n_tx_bytes);
773 /* The buffers were enqueued. Reset the length */
774 _vec_len (ptd->split_buffers) = 0;
775 /* Free the now segmented buffer */
776 vlib_buffer_free_one (vm, bi0);
781 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
784 vlib_increment_combined_counter (im->combined_sw_if_counters +
785 VNET_INTERFACE_COUNTER_TX,
786 thread_index, tx_swif0, 1,
791 calc_checksums (vm, b0);
794 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
797 /* Update main interface stats. */
798 vlib_increment_combined_counter (im->combined_sw_if_counters
799 + VNET_INTERFACE_COUNTER_TX,
801 rt->sw_if_index, n_packets, n_bytes);
805 static_always_inline uword
806 vnet_interface_output_node_inline (vlib_main_t * vm,
807 vlib_node_runtime_t * node,
808 vlib_frame_t * frame, vnet_main_t * vnm,
809 vnet_hw_interface_t * hi,
813 * The 3-headed "if" is here because we want to err on the side
814 * of not impacting the non-GSO performance - so for the more
815 * common case of no GSO interfaces we want to prevent the
816 * segmentation codepath from being there altogether.
818 if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
819 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
821 /* do_segmentation */ 0);
822 else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
823 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
825 /* do_segmentation */ 0);
827 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
829 /* do_segmentation */ 1);
833 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
834 vlib_frame_t * frame)
836 vnet_main_t *vnm = vnet_get_main ();
837 vnet_hw_interface_t *hi;
838 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
839 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
841 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
842 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
843 /* do_tx_offloads */ 0);
845 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
846 /* do_tx_offloads */ 1);
849 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
851 vnet_per_buffer_interface_output (vlib_main_t * vm,
852 vlib_node_runtime_t * node,
853 vlib_frame_t * frame)
855 vnet_main_t *vnm = vnet_get_main ();
856 u32 n_left_to_next, *from, *to_next;
857 u32 n_left_from, next_index;
859 n_left_from = frame->n_vectors;
861 from = vlib_frame_vector_args (frame);
862 next_index = node->cached_next_index;
864 while (n_left_from > 0)
866 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
868 while (n_left_from >= 4 && n_left_to_next >= 2)
870 u32 bi0, bi1, next0, next1;
871 vlib_buffer_t *b0, *b1;
872 vnet_hw_interface_t *hi0, *hi1;
874 /* Prefetch next iteration. */
875 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
876 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
887 b0 = vlib_get_buffer (vm, bi0);
888 b1 = vlib_get_buffer (vm, bi1);
891 vnet_get_sup_hw_interface (vnm,
892 vnet_buffer (b0)->sw_if_index
895 vnet_get_sup_hw_interface (vnm,
896 vnet_buffer (b1)->sw_if_index
899 next0 = hi0->output_node_next_index;
900 next1 = hi1->output_node_next_index;
902 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
903 n_left_to_next, bi0, bi1, next0,
907 while (n_left_from > 0 && n_left_to_next > 0)
911 vnet_hw_interface_t *hi0;
920 b0 = vlib_get_buffer (vm, bi0);
923 vnet_get_sup_hw_interface (vnm,
924 vnet_buffer (b0)->sw_if_index
927 next0 = hi0->output_node_next_index;
929 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
930 n_left_to_next, bi0, next0);
933 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
936 return frame->n_vectors;
940 counter_index (vlib_main_t * vm, vlib_error_t e)
945 ni = vlib_error_get_node (e);
946 n = vlib_get_node (vm, ni);
948 ci = vlib_error_get_code (e);
949 ASSERT (ci < n->n_errors);
951 ci += n->error_heap_index;
957 format_vnet_error_trace (u8 * s, va_list * va)
959 vlib_main_t *vm = va_arg (*va, vlib_main_t *);
960 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
961 vlib_error_t *e = va_arg (*va, vlib_error_t *);
962 vlib_node_t *error_node;
963 vlib_error_main_t *em = &vm->error_main;
966 error_node = vlib_get_node (vm, vlib_error_get_node (e[0]));
967 i = counter_index (vm, e[0]);
968 s = format (s, "%v: %s", error_node->name, em->error_strings_heap[i]);
974 trace_errors_with_buffers (vlib_main_t * vm,
975 vlib_node_runtime_t * node, vlib_frame_t * frame)
977 u32 n_left, *buffers;
979 buffers = vlib_frame_vector_args (frame);
980 n_left = frame->n_vectors;
985 vlib_buffer_t *b0, *b1;
986 vlib_error_t *t0, *t1;
988 /* Prefetch next iteration. */
989 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
990 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
995 b0 = vlib_get_buffer (vm, bi0);
996 b1 = vlib_get_buffer (vm, bi1);
998 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1000 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1003 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1005 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1020 b0 = vlib_get_buffer (vm, bi0);
1022 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1024 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1033 validate_error (vlib_main_t * vm, vlib_error_t * e, u32 index)
1035 uword node_index = vlib_error_get_node (e[0]);
1036 uword code = vlib_error_get_code (e[0]);
1039 if (node_index >= vec_len (vm->node_main.nodes))
1040 return format (0, "[%d], node index out of range 0x%x, error 0x%x",
1041 index, node_index, e[0]);
1043 n = vlib_get_node (vm, node_index);
1044 if (code >= n->n_errors)
1045 return format (0, "[%d], code %d out of range for node %v",
1046 index, code, n->name);
1052 validate_error_frame (vlib_main_t * vm,
1053 vlib_node_runtime_t * node, vlib_frame_t * f)
1055 u32 *buffers = vlib_frame_vector_args (f);
1060 for (i = 0; i < f->n_vectors; i++)
1062 b = vlib_get_buffer (vm, buffers[i]);
1063 msg = validate_error (vm, &b->error, i);
1073 VNET_ERROR_DISPOSITION_DROP,
1074 VNET_ERROR_DISPOSITION_PUNT,
1075 VNET_ERROR_N_DISPOSITION,
1076 } vnet_error_disposition_t;
1079 do_packet (vlib_main_t * vm, vlib_error_t a)
1081 vlib_error_main_t *em = &vm->error_main;
1082 u32 i = counter_index (vm, a);
1083 em->counters[i] += 1;
1084 vlib_error_elog_count (vm, i, 1);
1087 static_always_inline uword
1088 process_drop_punt (vlib_main_t * vm,
1089 vlib_node_runtime_t * node,
1090 vlib_frame_t * frame, vnet_error_disposition_t disposition)
1092 vnet_main_t *vnm = vnet_get_main ();
1093 vlib_error_main_t *em = &vm->error_main;
1094 u32 *buffers, *first_buffer;
1095 vlib_error_t current_error;
1096 u32 current_counter_index, n_errors_left;
1097 u32 current_sw_if_index, n_errors_current_sw_if_index;
1098 u64 current_counter;
1099 vlib_simple_counter_main_t *cm;
1100 u32 thread_index = vm->thread_index;
1102 static vlib_error_t memory[VNET_ERROR_N_DISPOSITION];
1103 static char memory_init[VNET_ERROR_N_DISPOSITION];
1105 buffers = vlib_frame_vector_args (frame);
1106 first_buffer = buffers;
1109 vlib_buffer_t *b = vlib_get_buffer (vm, first_buffer[0]);
1111 if (!memory_init[disposition])
1113 memory_init[disposition] = 1;
1114 memory[disposition] = b->error;
1117 current_sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
1118 n_errors_current_sw_if_index = 0;
1121 current_error = memory[disposition];
1122 current_counter_index = counter_index (vm, memory[disposition]);
1123 current_counter = em->counters[current_counter_index];
1125 if (node->flags & VLIB_NODE_FLAG_TRACE)
1126 trace_errors_with_buffers (vm, node, frame);
1128 n_errors_left = frame->n_vectors;
1129 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1130 (disposition == VNET_ERROR_DISPOSITION_PUNT
1131 ? VNET_INTERFACE_COUNTER_PUNT
1132 : VNET_INTERFACE_COUNTER_DROP));
1134 while (n_errors_left >= 2)
1136 vlib_buffer_t *b0, *b1;
1137 vnet_sw_interface_t *sw_if0, *sw_if1;
1138 vlib_error_t e0, e1;
1140 u32 sw_if_index0, sw_if_index1;
1148 b0 = vlib_get_buffer (vm, bi0);
1149 b1 = vlib_get_buffer (vm, bi1);
1154 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1155 sw_if_index1 = vnet_buffer (b1)->sw_if_index[VLIB_RX];
1157 /* Speculate that sw_if_index == sw_if_index[01]. */
1158 n_errors_current_sw_if_index += 2;
1160 /* Speculatively assume all 2 (node, code) pairs are equal
1161 to current (node, code). */
1162 current_counter += 2;
1164 if (PREDICT_FALSE (e0 != current_error
1165 || e1 != current_error
1166 || sw_if_index0 != current_sw_if_index
1167 || sw_if_index1 != current_sw_if_index))
1169 current_counter -= 2;
1170 n_errors_current_sw_if_index -= 2;
1172 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
1173 vlib_increment_simple_counter (cm, thread_index, sw_if_index1, 1);
1175 /* Increment super-interface drop/punt counters for
1177 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
1178 vlib_increment_simple_counter
1179 (cm, thread_index, sw_if0->sup_sw_if_index,
1180 sw_if0->sup_sw_if_index != sw_if_index0);
1182 sw_if1 = vnet_get_sw_interface (vnm, sw_if_index1);
1183 vlib_increment_simple_counter
1184 (cm, thread_index, sw_if1->sup_sw_if_index,
1185 sw_if1->sup_sw_if_index != sw_if_index1);
1187 em->counters[current_counter_index] = current_counter;
1191 /* For 2 repeated errors, change current error. */
1192 if (e0 == e1 && e1 != current_error)
1195 current_counter_index = counter_index (vm, e0);
1197 current_counter = em->counters[current_counter_index];
1201 while (n_errors_left >= 1)
1204 vnet_sw_interface_t *sw_if0;
1206 u32 bi0, sw_if_index0;
1212 current_counter += 1;
1214 b0 = vlib_get_buffer (vm, bi0);
1217 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1219 /* Increment drop/punt counters. */
1220 vlib_increment_simple_counter (cm, thread_index, sw_if_index0, 1);
1222 /* Increment super-interface drop/punt counters for sub-interfaces. */
1223 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index0);
1224 vlib_increment_simple_counter (cm, thread_index,
1225 sw_if0->sup_sw_if_index,
1226 sw_if0->sup_sw_if_index != sw_if_index0);
1228 if (PREDICT_FALSE (e0 != current_error))
1230 current_counter -= 1;
1232 vlib_error_elog_count (vm, current_counter_index,
1234 - em->counters[current_counter_index]));
1236 em->counters[current_counter_index] = current_counter;
1240 current_counter_index = counter_index (vm, e0);
1241 current_counter = em->counters[current_counter_index];
1245 if (n_errors_current_sw_if_index > 0)
1247 vnet_sw_interface_t *si;
1249 vlib_increment_simple_counter (cm, thread_index, current_sw_if_index,
1250 n_errors_current_sw_if_index);
1252 si = vnet_get_sw_interface (vnm, current_sw_if_index);
1253 if (si->sup_sw_if_index != current_sw_if_index)
1254 vlib_increment_simple_counter (cm, thread_index, si->sup_sw_if_index,
1255 n_errors_current_sw_if_index);
1258 vlib_error_elog_count (vm, current_counter_index,
1260 - em->counters[current_counter_index]));
1262 /* Return cached counter. */
1263 em->counters[current_counter_index] = current_counter;
1265 /* Save memory for next iteration. */
1266 memory[disposition] = current_error;
1268 if (disposition == VNET_ERROR_DISPOSITION_DROP || !vm->os_punt_frame)
1270 vlib_buffer_free (vm, first_buffer, frame->n_vectors);
1272 /* If there is no punt function, free the frame as well. */
1273 if (disposition == VNET_ERROR_DISPOSITION_PUNT && !vm->os_punt_frame)
1274 vlib_frame_free (vm, node, frame);
1277 vm->os_punt_frame (vm, node, frame);
1279 return frame->n_vectors;
1283 pcap_drop_trace (vlib_main_t * vm,
1284 vnet_interface_main_t * im, vlib_frame_t * f)
1287 u32 n_left = f->n_vectors;
1288 vlib_buffer_t *b0, *p1;
1290 i16 save_current_data;
1291 u16 save_current_length;
1293 from = vlib_frame_vector_args (f);
1297 if (PREDICT_TRUE (n_left > 1))
1299 p1 = vlib_get_buffer (vm, from[1]);
1300 vlib_prefetch_buffer_header (p1, LOAD);
1304 b0 = vlib_get_buffer (vm, bi0);
1308 /* See if we're pointedly ignoring this specific error */
1309 if (im->pcap_drop_filter_hash
1310 && hash_get (im->pcap_drop_filter_hash, b0->error))
1313 /* Trace all drops, or drops received on a specific interface */
1314 if (im->pcap_sw_if_index == 0 ||
1315 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1317 save_current_data = b0->current_data;
1318 save_current_length = b0->current_length;
1321 * Typically, we'll need to rewind the buffer
1323 if (b0->current_data > 0)
1324 vlib_buffer_advance (b0, (word) - b0->current_data);
1326 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1328 b0->current_data = save_current_data;
1329 b0->current_length = save_current_length;
1335 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1337 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1339 if (im->pcap_drop_filter_hash == 0)
1340 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1343 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1345 hash_unset (im->pcap_drop_filter_hash, error_index);
1349 process_drop (vlib_main_t * vm,
1350 vlib_node_runtime_t * node, vlib_frame_t * frame)
1352 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1354 if (PREDICT_FALSE (im->drop_pcap_enable))
1355 pcap_drop_trace (vm, im, frame);
1357 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1361 process_punt (vlib_main_t * vm,
1362 vlib_node_runtime_t * node, vlib_frame_t * frame)
1364 return process_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1368 VLIB_REGISTER_NODE (drop_buffers,static) = {
1369 .function = process_drop,
1370 .name = "error-drop",
1371 .flags = VLIB_NODE_FLAG_IS_DROP,
1372 .vector_size = sizeof (u32),
1373 .format_trace = format_vnet_error_trace,
1374 .validate_frame = validate_error_frame,
1378 VLIB_NODE_FUNCTION_MULTIARCH (drop_buffers, process_drop);
1381 VLIB_REGISTER_NODE (punt_buffers,static) = {
1382 .function = process_punt,
1383 .flags = (VLIB_NODE_FLAG_FRAME_NO_FREE_AFTER_DISPATCH
1384 | VLIB_NODE_FLAG_IS_PUNT),
1385 .name = "error-punt",
1386 .vector_size = sizeof (u32),
1387 .format_trace = format_vnet_error_trace,
1388 .validate_frame = validate_error_frame,
1392 VLIB_NODE_FUNCTION_MULTIARCH (punt_buffers, process_punt);
1395 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node,static) = {
1396 .function = vnet_per_buffer_interface_output,
1397 .name = "interface-output",
1398 .vector_size = sizeof (u32),
1402 /* Convenience node to drop a vector of buffers with a "misc error". */
1404 misc_drop_buffers (vlib_main_t * vm,
1405 vlib_node_runtime_t * node, vlib_frame_t * frame)
1407 return vlib_error_drop_buffers (vm, node, vlib_frame_vector_args (frame),
1408 /* buffer stride */ 1,
1415 static char *misc_drop_buffers_error_strings[] = {
1416 [0] = "misc. errors",
1420 VLIB_REGISTER_NODE (misc_drop_buffers_node,static) = {
1421 .function = misc_drop_buffers,
1422 .name = "misc-drop-buffers",
1423 .vector_size = sizeof (u32),
1429 .error_strings = misc_drop_buffers_error_strings,
1433 VLIB_NODE_FUNCTION_MULTIARCH (vnet_per_buffer_interface_output_node,
1434 vnet_per_buffer_interface_output);
1437 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1438 vlib_frame_t * from_frame)
1440 vnet_main_t *vnm = vnet_get_main ();
1441 u32 last_sw_if_index = ~0;
1442 vlib_frame_t *to_frame = 0;
1443 vnet_hw_interface_t *hw = 0;
1444 u32 *from, *to_next = 0;
1447 from = vlib_frame_vector_args (from_frame);
1448 n_left_from = from_frame->n_vectors;
1449 while (n_left_from > 0)
1458 b0 = vlib_get_buffer (vm, bi0);
1459 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1461 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1465 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1466 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1468 last_sw_if_index = sw_if_index0;
1469 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1470 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1471 to_next = vlib_frame_vector_args (to_frame);
1476 to_frame->n_vectors++;
1478 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1479 return from_frame->n_vectors;
1483 VLIB_REGISTER_NODE (interface_tx, static) = {
1484 .function = interface_tx_node_fn,
1485 .name = "interface-tx",
1486 .vector_size = sizeof (u32),
1493 VNET_FEATURE_ARC_INIT (interface_output, static) =
1495 .arc_name = "interface-output",
1496 .start_nodes = VNET_FEATURES (0),
1497 .last_in_arc = "interface-tx",
1498 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1501 VNET_FEATURE_INIT (span_tx, static) = {
1502 .arc_name = "interface-output",
1503 .node_name = "span-output",
1504 .runs_before = VNET_FEATURES ("interface-tx"),
1507 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1508 .arc_name = "interface-output",
1509 .node_name = "ipsec-if-output",
1510 .runs_before = VNET_FEATURES ("interface-tx"),
1513 VNET_FEATURE_INIT (interface_tx, static) = {
1514 .arc_name = "interface-output",
1515 .node_name = "interface-tx",
1521 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1525 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1528 if (hi->output_node_index == 0)
1531 next_index = vlib_node_add_next
1532 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1533 hi->output_node_index);
1534 hi->output_node_next_index = next_index;
1539 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1540 (vnet_per_buffer_interface_output_hw_interface_add_del);
1543 vnet_set_interface_output_node (vnet_main_t * vnm,
1544 u32 hw_if_index, u32 node_index)
1546 ASSERT (node_index);
1547 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1548 u32 next_index = vlib_node_add_next
1549 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1550 hi->output_node_next_index = next_index;
1551 hi->output_node_index = node_index;
1554 static clib_error_t *
1555 pcap_drop_trace_command_fn (vlib_main_t * vm,
1556 unformat_input_t * input,
1557 vlib_cli_command_t * cmd)
1559 vnet_main_t *vnm = vnet_get_main ();
1560 vnet_interface_main_t *im = &vnm->interface_main;
1564 clib_error_t *error = 0;
1566 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1568 if (unformat (input, "on"))
1570 if (im->drop_pcap_enable == 0)
1572 if (im->pcap_filename == 0)
1573 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1575 clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1576 im->pcap_main.file_name = (char *) im->pcap_filename;
1577 im->pcap_main.n_packets_to_capture = 100;
1578 if (im->pcap_pkts_to_capture)
1579 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1581 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1582 im->drop_pcap_enable = 1;
1584 vlib_cli_output (vm, "pcap drop capture on...");
1588 vlib_cli_output (vm, "pcap drop capture already on...");
1592 else if (unformat (input, "off"))
1596 if (im->drop_pcap_enable)
1598 vlib_cli_output (vm, "captured %d pkts...",
1599 im->pcap_main.n_packets_captured);
1600 if (im->pcap_main.n_packets_captured)
1602 im->pcap_main.n_packets_to_capture =
1603 im->pcap_main.n_packets_captured;
1604 error = pcap_write (&im->pcap_main);
1606 clib_error_report (error);
1608 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1613 vlib_cli_output (vm, "pcap drop capture already off...");
1616 im->drop_pcap_enable = 0;
1618 else if (unformat (input, "max %d", &max))
1620 im->pcap_pkts_to_capture = max;
1624 else if (unformat (input, "intfc %U",
1625 unformat_vnet_sw_interface, vnm,
1626 &im->pcap_sw_if_index))
1628 else if (unformat (input, "intfc any"))
1630 im->pcap_sw_if_index = 0;
1633 else if (unformat (input, "file %s", &filename))
1635 u8 *chroot_filename;
1636 /* Brain-police user path input */
1637 if (strstr ((char *) filename, "..")
1638 || index ((char *) filename, '/'))
1640 vlib_cli_output (vm, "illegal characters in filename '%s'",
1645 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1646 vec_free (filename);
1648 if (im->pcap_filename)
1649 vec_free (im->pcap_filename);
1650 im->pcap_filename = chroot_filename;
1651 im->pcap_main.file_name = (char *) im->pcap_filename;
1654 else if (unformat (input, "status"))
1656 if (im->drop_pcap_enable == 0)
1658 vlib_cli_output (vm, "pcap drop capture is off...");
1662 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1663 im->pcap_main.n_packets_captured,
1664 im->pcap_main.n_packets_to_capture);
1673 return clib_error_return (0, "unknown input `%U'",
1674 format_unformat_error, input);
1680 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1681 .path = "pcap drop trace",
1683 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1684 .function = pcap_drop_trace_command_fn,
1689 * fd.io coding-style-patch-verification: ON
1692 * eval: (c-set-style "gnu")