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;
57 #ifndef CLIB_MARCH_VARIANT
59 format_vnet_interface_output_trace (u8 * s, va_list * va)
61 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
62 vlib_node_t *node = va_arg (*va, vlib_node_t *);
63 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
64 vnet_main_t *vnm = vnet_get_main ();
65 vnet_sw_interface_t *si;
68 if (t->sw_if_index != (u32) ~ 0)
70 indent = format_get_indent (s);
72 if (pool_is_free_index
73 (vnm->interface_main.sw_interfaces, t->sw_if_index))
75 /* the interface may have been deleted by the time the trace is printed */
76 s = format (s, "sw_if_index: %d ", t->sw_if_index);
80 si = vnet_get_sw_interface (vnm, t->sw_if_index);
82 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
85 #define _(bit, name, v, x) \
86 if (v && (t->flags & VNET_BUFFER_F_##name)) \
87 s = format (s, "%s ", v);
88 foreach_vnet_buffer_flag
90 if (t->flags & VNET_BUFFER_F_GSO)
92 s = format (s, "\n%Ugso_sz %d gso_l4_hdr_sz %d",
93 format_white_space, indent + 2, t->gso_size,
97 format (s, "\n%U%U", format_white_space, indent,
98 node->format_buffer ? node->format_buffer : format_hex_bytes,
99 t->data, sizeof (t->data));
105 vnet_interface_output_trace (vlib_main_t * vm,
106 vlib_node_runtime_t * node,
107 vlib_frame_t * frame, uword n_buffers)
112 from = vlib_frame_vector_args (frame);
117 vlib_buffer_t *b0, *b1;
118 interface_output_trace_t *t0, *t1;
120 /* Prefetch next iteration. */
121 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
122 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
127 b0 = vlib_get_buffer (vm, bi0);
128 b1 = vlib_get_buffer (vm, bi1);
130 if (b0->flags & VLIB_BUFFER_IS_TRACED)
132 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
133 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
134 t0->flags = b0->flags;
135 t0->gso_size = vnet_buffer2 (b0)->gso_size;
136 t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
137 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
140 if (b1->flags & VLIB_BUFFER_IS_TRACED)
142 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
143 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
144 t1->flags = b1->flags;
145 t1->gso_size = vnet_buffer2 (b1)->gso_size;
146 t1->gso_l4_hdr_sz = vnet_buffer2 (b1)->gso_l4_hdr_sz;
147 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
158 interface_output_trace_t *t0;
162 b0 = vlib_get_buffer (vm, bi0);
164 if (b0->flags & VLIB_BUFFER_IS_TRACED)
166 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
167 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
168 t0->flags = b0->flags;
169 t0->gso_size = vnet_buffer2 (b0)->gso_size;
170 t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
171 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
179 static_always_inline void
180 calc_checksums (vlib_main_t * vm, vlib_buffer_t * b)
185 int is_ip4 = (b->flags & VNET_BUFFER_F_IS_IP4) != 0;
186 int is_ip6 = (b->flags & VNET_BUFFER_F_IS_IP6) != 0;
188 ASSERT (!(is_ip4 && is_ip6));
190 th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
191 uh = (udp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
197 ip4 = (ip4_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
198 if (b->flags & VNET_BUFFER_F_OFFLOAD_IP_CKSUM)
199 ip4->checksum = ip4_header_checksum (ip4);
200 if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
203 th->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
205 else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
206 uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
213 ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
214 if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
218 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
220 else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
224 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
227 b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
228 b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
229 b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
232 static_always_inline u16
233 tso_alloc_tx_bufs (vlib_main_t * vm,
234 vnet_interface_per_thread_data_t * ptd,
235 vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
239 clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz);
241 /* rounded-up division */
242 u16 n_bufs = (n_bytes_b0 - l234_sz + (size - 1)) / size;
246 vec_validate (ptd->split_buffers, n_bufs - 1);
248 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
249 if (n_alloc < n_bufs)
251 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
257 static_always_inline void
258 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
259 u32 flags, u16 length)
261 nb0->current_data = b0->current_data;
262 nb0->total_length_not_including_first_buffer = 0;
263 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
264 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
265 clib_memcpy_fast (vlib_buffer_get_current (nb0),
266 vlib_buffer_get_current (b0), length);
267 nb0->current_length = length;
270 static_always_inline void
271 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
272 vlib_buffer_t * b0, u16 template_data_sz,
273 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
274 u32 next_tcp_seq, u32 flags)
276 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
280 vlib_buffer_get_default_data_size (vm) - (template_data_sz +
282 *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
285 (tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset);
286 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
289 static_always_inline void
290 tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6)
292 u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
293 u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
294 ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset);
295 ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset);
296 tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset);
298 tcp->flags = tcp_flags;
301 ip6->payload_length =
302 clib_host_to_net_u16 (b0->current_length -
303 (l4_hdr_offset - b0->current_data));
306 clib_host_to_net_u16 (b0->current_length -
307 (l3_hdr_offset - b0->current_data));
311 * Allocate the necessary number of ptd->split_buffers,
312 * and segment the possibly chained buffer(s) from b0 into
315 * Return the cumulative number of bytes sent or zero
316 * if allocation failed.
319 static_always_inline u32
320 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
321 int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0,
325 int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4;
326 int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6;
327 ASSERT (is_ip4 || is_ip6);
328 ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID);
329 ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID);
330 ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
331 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
333 int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz;
334 u8 save_tcp_flags = 0;
335 u8 tcp_flags_no_fin_psh = 0;
336 u32 next_tcp_seq = 0;
339 (tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset);
340 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
341 /* store original flags for last packet and reset FIN and PSH */
342 save_tcp_flags = tcp->flags;
343 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
347 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
348 u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz
350 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
351 next_tcp_seq += first_data_size;
354 (!tso_alloc_tx_bufs (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size)))
357 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
358 tso_init_buf_from_template_base (b0, sb0, default_bflags,
359 l234_sz + first_data_size);
361 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
364 /* Need to copy more segments */
365 u8 *src_ptr, *dst_ptr;
366 u16 src_left, dst_left;
367 /* current source buffer */
368 vlib_buffer_t *csb0 = sb0;
370 /* current dest buffer */
372 u16 dbi = 1; /* the buffer [0] is b0 */
374 src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
375 src_left = sb0->current_length - l234_sz - first_data_size;
377 tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
379 calc_checksums (vm, b0);
381 /* grab a second buffer and prepare the loop */
382 ASSERT (dbi < vec_len (ptd->split_buffers));
383 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
384 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
385 &dst_left, next_tcp_seq, default_bflags);
387 /* an arbitrary large number to catch the runaway loops */
389 while (total_src_left)
392 clib_panic ("infinite loop detected");
393 u16 bytes_to_copy = clib_min (src_left, dst_left);
395 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
397 src_left -= bytes_to_copy;
398 src_ptr += bytes_to_copy;
399 total_src_left -= bytes_to_copy;
400 dst_left -= bytes_to_copy;
401 dst_ptr += bytes_to_copy;
402 next_tcp_seq += bytes_to_copy;
403 cdb0->current_length += bytes_to_copy;
407 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
408 u32 next_bi = csb0->next_buffer;
410 /* init src to the next buffer in chain */
414 csb0 = vlib_get_buffer (vm, csbi0);
415 src_left = csb0->current_length;
416 src_ptr = vlib_buffer_get_current (csb0);
420 ASSERT (total_src_left == 0);
424 if (0 == dst_left && total_src_left)
427 calc_checksums (vm, cdb0);
428 n_tx_bytes += cdb0->current_length;
429 ASSERT (dbi < vec_len (ptd->split_buffers));
430 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
431 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
432 gso_size, &dst_ptr, &dst_left,
433 next_tcp_seq, default_bflags);
437 tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
439 calc_checksums (vm, cdb0);
441 n_tx_bytes += cdb0->current_length;
443 n_tx_bytes += b0->current_length;
447 static_always_inline void
448 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
449 vlib_node_runtime_t * node, u32 * pbi0,
452 u32 thread_index = vm->thread_index;
453 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
455 vlib_simple_counter_main_t *cm;
457 vec_elt_at_index (vnm->interface_main.sw_if_counters,
458 VNET_INTERFACE_COUNTER_TX_ERROR);
459 vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
461 vlib_error_drop_buffers (vm, node, pbi0,
462 /* buffer stride */ 1,
464 VNET_INTERFACE_OUTPUT_NEXT_DROP,
465 node->node_index, drop_error_code);
468 static_always_inline uword
469 vnet_interface_output_node_inline_gso (vlib_main_t * vm,
470 vlib_node_runtime_t * node,
471 vlib_frame_t * frame,
473 vnet_hw_interface_t * hi,
477 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
478 vnet_sw_interface_t *si;
479 u32 n_left_to_tx, *from, *from_end, *to_tx;
480 u32 n_bytes, n_buffers, n_packets;
481 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
482 u32 thread_index = vm->thread_index;
483 vnet_interface_main_t *im = &vnm->interface_main;
484 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
485 u32 current_config_index = ~0;
486 u8 arc = im->output_feature_arc_index;
487 vnet_interface_per_thread_data_t *ptd =
488 vec_elt_at_index (im->per_thread_data, thread_index);
489 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
491 n_buffers = frame->n_vectors;
493 if (node->flags & VLIB_NODE_FLAG_TRACE)
494 vnet_interface_output_trace (vm, node, frame, n_buffers);
496 from = vlib_frame_vector_args (frame);
497 vlib_get_buffers (vm, from, b, n_buffers);
500 return vlib_error_drop_buffers (vm, node, from,
501 /* buffer stride */ 1,
503 VNET_INTERFACE_OUTPUT_NEXT_DROP,
505 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
507 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
508 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
509 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
510 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
512 vlib_simple_counter_main_t *cm;
514 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
515 VNET_INTERFACE_COUNTER_TX_ERROR);
516 vlib_increment_simple_counter (cm, thread_index,
517 rt->sw_if_index, n_buffers);
519 return vlib_error_drop_buffers (vm, node, from,
520 /* buffer stride */ 1,
522 VNET_INTERFACE_OUTPUT_NEXT_DROP,
524 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
527 from_end = from + n_buffers;
529 /* Total byte count of all buffers. */
533 /* interface-output feature arc handling */
534 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
536 vnet_feature_config_main_t *fcm;
537 fcm = vnet_feature_get_config_main (arc);
538 current_config_index = vnet_get_feature_config_index (arc,
540 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
544 while (from < from_end)
546 /* Get new next frame since previous incomplete frame may have less
547 than VNET_FRAME_SIZE vectors in it. */
548 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
550 while (from + 8 <= from_end && n_left_to_tx >= 4)
552 u32 bi0, bi1, bi2, bi3;
553 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
556 /* Prefetch next iteration. */
557 vlib_prefetch_buffer_header (b[4], LOAD);
558 vlib_prefetch_buffer_header (b[5], LOAD);
559 vlib_prefetch_buffer_header (b[6], LOAD);
560 vlib_prefetch_buffer_header (b[7], LOAD);
571 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
575 /* go to single loop if we need TSO segmentation */
576 if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
583 /* Be grumpy about zero length buffers for benefit of
584 driver tx function. */
585 ASSERT (b[0]->current_length > 0);
586 ASSERT (b[1]->current_length > 0);
587 ASSERT (b[2]->current_length > 0);
588 ASSERT (b[3]->current_length > 0);
590 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
591 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
592 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
593 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
594 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
595 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
596 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
597 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
599 n_bytes += n_bytes_b0 + n_bytes_b1;
600 n_bytes += n_bytes_b2 + n_bytes_b3;
603 if (PREDICT_FALSE (current_config_index != ~0))
605 vnet_buffer (b[0])->feature_arc_index = arc;
606 vnet_buffer (b[1])->feature_arc_index = arc;
607 vnet_buffer (b[2])->feature_arc_index = arc;
608 vnet_buffer (b[3])->feature_arc_index = arc;
609 b[0]->current_config_index = current_config_index;
610 b[1]->current_config_index = current_config_index;
611 b[2]->current_config_index = current_config_index;
612 b[3]->current_config_index = current_config_index;
615 /* update vlan subif tx counts, if required */
616 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
618 vlib_increment_combined_counter (im->combined_sw_if_counters +
619 VNET_INTERFACE_COUNTER_TX,
620 thread_index, tx_swif0, 1,
624 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
627 vlib_increment_combined_counter (im->combined_sw_if_counters +
628 VNET_INTERFACE_COUNTER_TX,
629 thread_index, tx_swif1, 1,
633 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
636 vlib_increment_combined_counter (im->combined_sw_if_counters +
637 VNET_INTERFACE_COUNTER_TX,
638 thread_index, tx_swif2, 1,
641 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
644 vlib_increment_combined_counter (im->combined_sw_if_counters +
645 VNET_INTERFACE_COUNTER_TX,
646 thread_index, tx_swif3, 1,
653 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
654 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
655 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
657 calc_checksums (vm, b[0]);
658 calc_checksums (vm, b[1]);
659 calc_checksums (vm, b[2]);
660 calc_checksums (vm, b[3]);
667 while (from + 1 <= from_end && n_left_to_tx >= 1)
678 /* Be grumpy about zero length buffers for benefit of
679 driver tx function. */
680 ASSERT (b[0]->current_length > 0);
682 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
683 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
684 n_bytes += n_bytes_b0;
687 if (PREDICT_FALSE (current_config_index != ~0))
689 vnet_buffer (b[0])->feature_arc_index = arc;
690 b[0]->current_config_index = current_config_index;
695 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
698 * Undo the enqueue of the b0 - it is not going anywhere,
699 * and will be freed either after it's segmented or
700 * when dropped, if there is no buffers to segment into.
704 /* undo the counting. */
705 n_bytes -= n_bytes_b0;
711 tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b[0],
714 if (PREDICT_FALSE (n_tx_bytes == 0))
716 drop_one_buffer_and_count (vm, vnm, node, from - 1,
717 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
722 u16 n_tx_bufs = vec_len (ptd->split_buffers);
723 u32 *from_tx_seg = ptd->split_buffers;
725 while (n_tx_bufs > 0)
727 if (n_tx_bufs >= n_left_to_tx)
729 while (n_left_to_tx > 0)
731 to_tx[0] = from_tx_seg[0];
738 vlib_put_next_frame (vm, node, next_index,
740 vlib_get_new_next_frame (vm, node, next_index,
741 to_tx, n_left_to_tx);
743 while (n_tx_bufs > 0)
745 to_tx[0] = from_tx_seg[0];
753 n_bytes += n_tx_bytes;
754 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
757 vlib_increment_combined_counter
758 (im->combined_sw_if_counters +
759 VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
760 _vec_len (ptd->split_buffers), n_tx_bytes);
762 /* The buffers were enqueued. Reset the length */
763 _vec_len (ptd->split_buffers) = 0;
764 /* Free the now segmented buffer */
765 vlib_buffer_free_one (vm, bi0);
771 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
774 vlib_increment_combined_counter (im->combined_sw_if_counters +
775 VNET_INTERFACE_COUNTER_TX,
776 thread_index, tx_swif0, 1,
781 calc_checksums (vm, b[0]);
786 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
789 /* Update main interface stats. */
790 vlib_increment_combined_counter (im->combined_sw_if_counters
791 + VNET_INTERFACE_COUNTER_TX,
793 rt->sw_if_index, n_packets, n_bytes);
796 #endif /* CLIB_MARCH_VARIANT */
798 static_always_inline void vnet_interface_pcap_tx_trace
799 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
800 int sw_if_index_from_buffer)
802 u32 n_left_from, *from;
805 if (PREDICT_TRUE (vlib_global_main.pcap[VLIB_TX].pcap_enable == 0))
808 if (sw_if_index_from_buffer == 0)
810 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
811 sw_if_index = rt->sw_if_index;
816 n_left_from = frame->n_vectors;
817 from = vlib_frame_vector_args (frame);
819 while (n_left_from > 0)
822 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
824 if (sw_if_index_from_buffer)
825 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
827 if (vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == 0 ||
828 vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
829 pcap_add_buffer (&vlib_global_main.pcap[VLIB_TX].pcap_main, vm, bi0,
836 #ifndef CLIB_MARCH_VARIANT
837 static_always_inline uword
838 vnet_interface_output_node_inline (vlib_main_t * vm,
839 vlib_node_runtime_t * node,
840 vlib_frame_t * frame, vnet_main_t * vnm,
841 vnet_hw_interface_t * hi,
845 * The 3-headed "if" is here because we want to err on the side
846 * of not impacting the non-GSO performance - so for the more
847 * common case of no GSO interfaces we want to prevent the
848 * segmentation codepath from being there altogether.
850 if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
851 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
853 /* do_segmentation */ 0);
854 else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
855 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
857 /* do_segmentation */ 0);
859 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
861 /* do_segmentation */ 1);
865 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
866 vlib_frame_t * frame)
868 vnet_main_t *vnm = vnet_get_main ();
869 vnet_hw_interface_t *hi;
870 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
871 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
873 vnet_interface_pcap_tx_trace (vm, node, frame,
874 0 /* sw_if_index_from_buffer */ );
876 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
877 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
878 /* do_tx_offloads */ 0);
880 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
881 /* do_tx_offloads */ 1);
883 #endif /* CLIB_MARCH_VARIANT */
885 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
886 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
887 vlib_node_runtime_t *
889 vlib_frame_t * frame)
891 vnet_main_t *vnm = vnet_get_main ();
892 u32 n_left_to_next, *from, *to_next;
893 u32 n_left_from, next_index;
895 vnet_interface_pcap_tx_trace (vm, node, frame,
896 1 /* sw_if_index_from_buffer */ );
898 n_left_from = frame->n_vectors;
900 from = vlib_frame_vector_args (frame);
901 next_index = node->cached_next_index;
903 while (n_left_from > 0)
905 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
907 while (n_left_from >= 4 && n_left_to_next >= 2)
909 u32 bi0, bi1, next0, next1;
910 vlib_buffer_t *b0, *b1;
911 vnet_hw_interface_t *hi0, *hi1;
913 /* Prefetch next iteration. */
914 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
915 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
926 b0 = vlib_get_buffer (vm, bi0);
927 b1 = vlib_get_buffer (vm, bi1);
930 vnet_get_sup_hw_interface (vnm,
931 vnet_buffer (b0)->sw_if_index
934 vnet_get_sup_hw_interface (vnm,
935 vnet_buffer (b1)->sw_if_index
938 next0 = hi0->output_node_next_index;
939 next1 = hi1->output_node_next_index;
941 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
942 n_left_to_next, bi0, bi1, next0,
946 while (n_left_from > 0 && n_left_to_next > 0)
950 vnet_hw_interface_t *hi0;
959 b0 = vlib_get_buffer (vm, bi0);
962 vnet_get_sup_hw_interface (vnm,
963 vnet_buffer (b0)->sw_if_index
966 next0 = hi0->output_node_next_index;
968 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
969 n_left_to_next, bi0, next0);
972 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
975 return frame->n_vectors;
978 typedef struct vnet_error_trace_t_
981 } vnet_error_trace_t;
985 format_vnet_error_trace (u8 * s, va_list * va)
987 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
988 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
989 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
991 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
992 vnet_get_main (), t->sw_if_index);
998 interface_trace_buffers (vlib_main_t * vm,
999 vlib_node_runtime_t * node, vlib_frame_t * frame)
1001 u32 n_left, *buffers;
1003 buffers = vlib_frame_vector_args (frame);
1004 n_left = frame->n_vectors;
1009 vlib_buffer_t *b0, *b1;
1010 vnet_error_trace_t *t0, *t1;
1012 /* Prefetch next iteration. */
1013 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
1014 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
1019 b0 = vlib_get_buffer (vm, bi0);
1020 b1 = vlib_get_buffer (vm, bi1);
1022 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1024 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1025 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1027 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1029 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1030 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
1040 vnet_error_trace_t *t0;
1044 b0 = vlib_get_buffer (vm, bi0);
1046 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1048 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1049 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1058 VNET_ERROR_DISPOSITION_DROP,
1059 VNET_ERROR_DISPOSITION_PUNT,
1060 VNET_ERROR_N_DISPOSITION,
1061 } vnet_error_disposition_t;
1063 static_always_inline uword
1064 interface_drop_punt (vlib_main_t * vm,
1065 vlib_node_runtime_t * node,
1066 vlib_frame_t * frame,
1067 vnet_error_disposition_t disposition)
1069 u32 *from, n_left, thread_index, *sw_if_index;
1070 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1071 u32 sw_if_indices[VLIB_FRAME_SIZE];
1072 vlib_simple_counter_main_t *cm;
1073 u16 nexts[VLIB_FRAME_SIZE];
1076 vnm = vnet_get_main ();
1077 thread_index = vm->thread_index;
1078 from = vlib_frame_vector_args (frame);
1079 n_left = frame->n_vectors;
1081 sw_if_index = sw_if_indices;
1083 vlib_get_buffers (vm, from, bufs, n_left);
1085 if (node->flags & VLIB_NODE_FLAG_TRACE)
1086 interface_trace_buffers (vm, node, frame);
1088 /* All going to drop regardless, this is just a counting exercise */
1089 clib_memset (nexts, 0, sizeof (nexts));
1091 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1092 (disposition == VNET_ERROR_DISPOSITION_PUNT
1093 ? VNET_INTERFACE_COUNTER_PUNT
1094 : VNET_INTERFACE_COUNTER_DROP));
1096 /* collect the array of interfaces first ... */
1101 /* Prefetch 8 ahead - there's not much going on in each iteration */
1102 vlib_prefetch_buffer_header (b[4], LOAD);
1103 vlib_prefetch_buffer_header (b[5], LOAD);
1104 vlib_prefetch_buffer_header (b[6], LOAD);
1105 vlib_prefetch_buffer_header (b[7], LOAD);
1107 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1108 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1109 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1110 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1118 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1125 /* ... then count against them in blocks */
1126 n_left = frame->n_vectors;
1130 vnet_sw_interface_t *sw_if0;
1133 off = frame->n_vectors - n_left;
1135 sw_if_index = sw_if_indices + off;
1137 count = clib_count_equal_u32 (sw_if_index, n_left);
1140 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1142 /* Increment super-interface drop/punt counters for
1144 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1145 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1146 vlib_increment_simple_counter
1147 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1150 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1152 return frame->n_vectors;
1156 pcap_drop_trace (vlib_main_t * vm,
1157 vnet_interface_main_t * im, vlib_frame_t * f)
1160 u32 n_left = f->n_vectors;
1161 vlib_buffer_t *b0, *p1;
1163 i16 save_current_data;
1164 u16 save_current_length;
1166 from = vlib_frame_vector_args (f);
1170 if (PREDICT_TRUE (n_left > 1))
1172 p1 = vlib_get_buffer (vm, from[1]);
1173 vlib_prefetch_buffer_header (p1, LOAD);
1177 b0 = vlib_get_buffer (vm, bi0);
1181 /* See if we're pointedly ignoring this specific error */
1182 if (im->pcap_drop_filter_hash
1183 && hash_get (im->pcap_drop_filter_hash, b0->error))
1186 /* Trace all drops, or drops received on a specific interface */
1187 if (im->pcap_sw_if_index == 0 ||
1188 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1190 save_current_data = b0->current_data;
1191 save_current_length = b0->current_length;
1194 * Typically, we'll need to rewind the buffer
1196 if (b0->current_data > 0)
1197 vlib_buffer_advance (b0, (word) - b0->current_data);
1199 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1201 b0->current_data = save_current_data;
1202 b0->current_length = save_current_length;
1207 #ifndef CLIB_MARCH_VARIANT
1209 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1211 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1213 if (im->pcap_drop_filter_hash == 0)
1214 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1217 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1219 hash_unset (im->pcap_drop_filter_hash, error_index);
1221 #endif /* CLIB_MARCH_VARIANT */
1223 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1224 vlib_node_runtime_t * node,
1225 vlib_frame_t * frame)
1227 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1229 if (PREDICT_FALSE (im->drop_pcap_enable))
1230 pcap_drop_trace (vm, im, frame);
1232 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1235 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1236 vlib_node_runtime_t * node,
1237 vlib_frame_t * frame)
1239 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1243 VLIB_REGISTER_NODE (interface_drop) = {
1244 .name = "error-drop",
1245 .vector_size = sizeof (u32),
1246 .format_trace = format_vnet_error_trace,
1255 VLIB_REGISTER_NODE (interface_punt) = {
1256 .name = "error-punt",
1257 .vector_size = sizeof (u32),
1258 .format_trace = format_vnet_error_trace,
1267 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1268 .name = "interface-output",
1269 .vector_size = sizeof (u32),
1274 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1275 vlib_frame_t * from_frame)
1277 vnet_main_t *vnm = vnet_get_main ();
1278 u32 last_sw_if_index = ~0;
1279 vlib_frame_t *to_frame = 0;
1280 vnet_hw_interface_t *hw = 0;
1281 u32 *from, *to_next = 0;
1284 from = vlib_frame_vector_args (from_frame);
1285 n_left_from = from_frame->n_vectors;
1286 while (n_left_from > 0)
1295 b0 = vlib_get_buffer (vm, bi0);
1296 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1298 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1302 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1303 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1305 last_sw_if_index = sw_if_index0;
1306 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1307 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1308 to_next = vlib_frame_vector_args (to_frame);
1313 to_frame->n_vectors++;
1315 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1316 return from_frame->n_vectors;
1320 VLIB_REGISTER_NODE (interface_tx) = {
1321 .function = interface_tx_node_fn,
1322 .name = "interface-tx",
1323 .vector_size = sizeof (u32),
1330 VNET_FEATURE_ARC_INIT (interface_output, static) =
1332 .arc_name = "interface-output",
1333 .start_nodes = VNET_FEATURES (0),
1334 .last_in_arc = "interface-tx",
1335 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1338 VNET_FEATURE_INIT (span_tx, static) = {
1339 .arc_name = "interface-output",
1340 .node_name = "span-output",
1341 .runs_before = VNET_FEATURES ("interface-tx"),
1344 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1345 .arc_name = "interface-output",
1346 .node_name = "ipsec-if-output",
1347 .runs_before = VNET_FEATURES ("interface-tx"),
1350 VNET_FEATURE_INIT (interface_tx, static) = {
1351 .arc_name = "interface-output",
1352 .node_name = "interface-tx",
1357 #ifndef CLIB_MARCH_VARIANT
1359 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1363 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1366 if (hi->output_node_index == 0)
1369 next_index = vlib_node_add_next
1370 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1371 hi->output_node_index);
1372 hi->output_node_next_index = next_index;
1377 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1378 (vnet_per_buffer_interface_output_hw_interface_add_del);
1381 vnet_set_interface_output_node (vnet_main_t * vnm,
1382 u32 hw_if_index, u32 node_index)
1384 ASSERT (node_index);
1385 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1386 u32 next_index = vlib_node_add_next
1387 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1388 hi->output_node_next_index = next_index;
1389 hi->output_node_index = node_index;
1391 #endif /* CLIB_MARCH_VARIANT */
1393 static clib_error_t *
1394 pcap_drop_trace_command_fn (vlib_main_t * vm,
1395 unformat_input_t * input,
1396 vlib_cli_command_t * cmd)
1398 vnet_main_t *vnm = vnet_get_main ();
1399 vnet_interface_main_t *im = &vnm->interface_main;
1403 clib_error_t *error = 0;
1405 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1407 if (unformat (input, "on"))
1409 if (im->drop_pcap_enable == 0)
1411 if (im->pcap_filename == 0)
1412 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1414 clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1415 im->pcap_main.file_name = (char *) im->pcap_filename;
1416 im->pcap_main.n_packets_to_capture = PCAP_DEF_PKT_TO_CAPTURE;
1417 if (im->pcap_pkts_to_capture)
1418 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1420 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1421 im->drop_pcap_enable = 1;
1423 vlib_cli_output (vm, "pcap drop capture on...");
1427 vlib_cli_output (vm, "pcap drop capture already on...");
1431 else if (unformat (input, "off"))
1435 if (im->drop_pcap_enable)
1437 vlib_cli_output (vm, "captured %d pkts...",
1438 im->pcap_main.n_packets_captured);
1439 if (im->pcap_main.n_packets_captured)
1441 im->pcap_main.n_packets_to_capture =
1442 im->pcap_main.n_packets_captured;
1443 error = pcap_write (&im->pcap_main);
1444 if (im->pcap_main.file_descriptor >= 0)
1445 pcap_close (&im->pcap_main);
1447 clib_error_report (error);
1449 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1454 vlib_cli_output (vm, "pcap drop capture already off...");
1457 im->drop_pcap_enable = 0;
1459 else if (unformat (input, "max %d", &max))
1461 im->pcap_pkts_to_capture = max;
1465 else if (unformat (input, "intfc %U",
1466 unformat_vnet_sw_interface, vnm,
1467 &im->pcap_sw_if_index))
1469 else if (unformat (input, "intfc any"))
1471 im->pcap_sw_if_index = 0;
1474 else if (unformat (input, "file %s", &filename))
1476 u8 *chroot_filename;
1477 /* Brain-police user path input */
1478 if (strstr ((char *) filename, "..")
1479 || index ((char *) filename, '/'))
1481 vlib_cli_output (vm, "illegal characters in filename '%s'",
1486 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1487 vec_free (filename);
1489 if (im->pcap_filename)
1490 vec_free (im->pcap_filename);
1491 im->pcap_filename = chroot_filename;
1492 im->pcap_main.file_name = (char *) im->pcap_filename;
1495 else if (unformat (input, "status"))
1497 if (im->drop_pcap_enable == 0)
1499 vlib_cli_output (vm, "pcap drop capture is off...");
1503 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1504 im->pcap_main.n_packets_captured,
1505 im->pcap_main.n_packets_to_capture);
1514 return clib_error_return (0, "unknown input `%U'",
1515 format_unformat_error, input);
1521 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1522 .path = "pcap drop trace",
1524 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1525 .function = pcap_drop_trace_command_fn,
1530 * fd.io coding-style-patch-verification: ON
1533 * eval: (c-set-style "gnu")