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);
228 b->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
229 b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
230 b->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
233 static_always_inline u16
234 tso_alloc_tx_bufs (vlib_main_t * vm,
235 vnet_interface_per_thread_data_t * ptd,
236 vlib_buffer_t * b0, u16 l4_hdr_sz)
238 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
239 u16 gso_size = vnet_buffer2 (b0)->gso_size;
240 u16 l234_sz = vnet_buffer (b0)->l4_hdr_offset + l4_hdr_sz;
241 /* rounded-up division */
242 u16 n_bufs = (n_bytes_b0 - l234_sz + (gso_size - 1)) / gso_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 = 0;
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 (nb0->data, b0->data, length);
266 nb0->current_length = length;
269 static_always_inline void
270 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
271 vlib_buffer_t * b0, u16 template_data_sz,
272 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
273 u32 next_tcp_seq, u32 flags)
275 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
279 vlib_buffer_get_default_data_size (vm) - template_data_sz);
280 *p_dst_ptr = nb0->data + template_data_sz;
283 (tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset);
284 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
287 static_always_inline void
288 tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6)
290 u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
291 u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
292 ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset);
293 ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset);
294 tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset);
296 tcp->flags = tcp_flags;
299 ip6->payload_length =
300 clib_host_to_net_u16 (b0->current_length -
301 vnet_buffer (b0)->l4_hdr_offset);
304 clib_host_to_net_u16 (b0->current_length -
305 vnet_buffer (b0)->l3_hdr_offset);
309 * Allocate the necessary number of ptd->split_buffers,
310 * and segment the possibly chained buffer(s) from b0 into
313 * Return the cumulative number of bytes sent or zero
314 * if allocation failed.
317 static_always_inline u32
318 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
319 int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0,
323 int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4;
324 int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6;
325 ASSERT (is_ip4 || is_ip6);
326 ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID);
327 ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID);
328 ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
329 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
331 int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz;
332 u8 save_tcp_flags = 0;
333 u8 tcp_flags_no_fin_psh = 0;
334 u32 next_tcp_seq = 0;
337 (tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset);
338 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
339 /* store original flags for last packet and reset FIN and PSH */
340 save_tcp_flags = tcp->flags;
341 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
345 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
346 u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz;
347 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
348 next_tcp_seq += first_data_size;
350 if (PREDICT_FALSE (!tso_alloc_tx_bufs (vm, ptd, sb0, l4_hdr_sz)))
353 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
354 tso_init_buf_from_template_base (b0, sb0, default_bflags,
355 l4_hdr_sz + first_data_size);
357 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
360 /* Need to copy more segments */
361 u8 *src_ptr, *dst_ptr;
362 u16 src_left, dst_left;
363 /* current source buffer */
364 vlib_buffer_t *csb0 = sb0;
366 /* current dest buffer */
368 u16 dbi = 1; /* the buffer [0] is b0 */
370 src_ptr = sb0->data + l234_sz + first_data_size;
371 src_left = sb0->current_length - l234_sz - first_data_size;
372 b0->current_length = l234_sz + first_data_size;
374 tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
376 calc_checksums (vm, b0);
378 /* grab a second buffer and prepare the loop */
379 ASSERT (dbi < vec_len (ptd->split_buffers));
380 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
381 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
382 &dst_left, next_tcp_seq, default_bflags);
384 /* an arbitrary large number to catch the runaway loops */
386 while (total_src_left)
389 clib_panic ("infinite loop detected");
390 u16 bytes_to_copy = clib_min (src_left, dst_left);
392 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
394 src_left -= bytes_to_copy;
395 src_ptr += bytes_to_copy;
396 total_src_left -= bytes_to_copy;
397 dst_left -= bytes_to_copy;
398 dst_ptr += bytes_to_copy;
399 next_tcp_seq += bytes_to_copy;
400 cdb0->current_length += bytes_to_copy;
404 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
405 u32 next_bi = csb0->next_buffer;
407 /* init src to the next buffer in chain */
411 csb0 = vlib_get_buffer (vm, csbi0);
412 src_left = csb0->current_length;
413 src_ptr = csb0->data;
417 ASSERT (total_src_left == 0);
421 if (0 == dst_left && total_src_left)
424 calc_checksums (vm, cdb0);
425 n_tx_bytes += cdb0->current_length;
426 ASSERT (dbi < vec_len (ptd->split_buffers));
427 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
428 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
429 gso_size, &dst_ptr, &dst_left,
430 next_tcp_seq, default_bflags);
434 tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
436 calc_checksums (vm, cdb0);
438 n_tx_bytes += cdb0->current_length;
440 n_tx_bytes += b0->current_length;
444 static_always_inline void
445 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
446 vlib_node_runtime_t * node, u32 * pbi0,
449 u32 thread_index = vm->thread_index;
450 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
452 vlib_simple_counter_main_t *cm;
454 vec_elt_at_index (vnm->interface_main.sw_if_counters,
455 VNET_INTERFACE_COUNTER_TX_ERROR);
456 vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
458 vlib_error_drop_buffers (vm, node, pbi0,
459 /* buffer stride */ 1,
461 VNET_INTERFACE_OUTPUT_NEXT_DROP,
462 node->node_index, drop_error_code);
465 static_always_inline uword
466 vnet_interface_output_node_inline_gso (vlib_main_t * vm,
467 vlib_node_runtime_t * node,
468 vlib_frame_t * frame,
470 vnet_hw_interface_t * hi,
474 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
475 vnet_sw_interface_t *si;
476 u32 n_left_to_tx, *from, *from_end, *to_tx;
477 u32 n_bytes, n_buffers, n_packets;
478 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
479 u32 thread_index = vm->thread_index;
480 vnet_interface_main_t *im = &vnm->interface_main;
481 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
482 u32 current_config_index = ~0;
483 u8 arc = im->output_feature_arc_index;
484 vnet_interface_per_thread_data_t *ptd =
485 vec_elt_at_index (im->per_thread_data, thread_index);
487 n_buffers = frame->n_vectors;
489 if (node->flags & VLIB_NODE_FLAG_TRACE)
490 vnet_interface_output_trace (vm, node, frame, n_buffers);
492 from = vlib_frame_vector_args (frame);
495 return vlib_error_drop_buffers (vm, node, from,
496 /* buffer stride */ 1,
498 VNET_INTERFACE_OUTPUT_NEXT_DROP,
500 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
502 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
503 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
504 if (!(si->flags & (VNET_SW_INTERFACE_FLAG_ADMIN_UP |
505 VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) ||
506 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
508 vlib_simple_counter_main_t *cm;
510 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
511 VNET_INTERFACE_COUNTER_TX_ERROR);
512 vlib_increment_simple_counter (cm, thread_index,
513 rt->sw_if_index, n_buffers);
515 return vlib_error_drop_buffers (vm, node, from,
516 /* buffer stride */ 1,
518 VNET_INTERFACE_OUTPUT_NEXT_DROP,
520 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
523 from_end = from + n_buffers;
525 /* Total byte count of all buffers. */
529 /* interface-output feature arc handling */
530 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
532 vnet_feature_config_main_t *fcm;
533 fcm = vnet_feature_get_config_main (arc);
534 current_config_index = vnet_get_feature_config_index (arc,
536 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
540 while (from < from_end)
542 /* Get new next frame since previous incomplete frame may have less
543 than VNET_FRAME_SIZE vectors in it. */
544 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
546 while (from + 8 <= from_end && n_left_to_tx >= 4)
548 u32 bi0, bi1, bi2, bi3;
549 vlib_buffer_t *b0, *b1, *b2, *b3;
550 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
553 /* Prefetch next iteration. */
554 vlib_prefetch_buffer_with_index (vm, from[4], LOAD);
555 vlib_prefetch_buffer_with_index (vm, from[5], LOAD);
556 vlib_prefetch_buffer_with_index (vm, from[6], LOAD);
557 vlib_prefetch_buffer_with_index (vm, from[7], LOAD);
567 if (!do_segmentation)
574 b0 = vlib_get_buffer (vm, bi0);
575 b1 = vlib_get_buffer (vm, bi1);
576 b2 = vlib_get_buffer (vm, bi2);
577 b3 = vlib_get_buffer (vm, bi3);
581 or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
583 /* go to single loop if we need TSO segmentation */
584 if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
591 /* Be grumpy about zero length buffers for benefit of
592 driver tx function. */
593 ASSERT (b0->current_length > 0);
594 ASSERT (b1->current_length > 0);
595 ASSERT (b2->current_length > 0);
596 ASSERT (b3->current_length > 0);
598 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
599 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b1);
600 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b2);
601 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b3);
602 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
603 tx_swif1 = vnet_buffer (b1)->sw_if_index[VLIB_TX];
604 tx_swif2 = vnet_buffer (b2)->sw_if_index[VLIB_TX];
605 tx_swif3 = vnet_buffer (b3)->sw_if_index[VLIB_TX];
607 n_bytes += n_bytes_b0 + n_bytes_b1;
608 n_bytes += n_bytes_b2 + n_bytes_b3;
611 if (PREDICT_FALSE (current_config_index != ~0))
613 vnet_buffer (b0)->feature_arc_index = arc;
614 vnet_buffer (b1)->feature_arc_index = arc;
615 vnet_buffer (b2)->feature_arc_index = arc;
616 vnet_buffer (b3)->feature_arc_index = arc;
617 b0->current_config_index = current_config_index;
618 b1->current_config_index = current_config_index;
619 b2->current_config_index = current_config_index;
620 b3->current_config_index = current_config_index;
623 /* update vlan subif tx counts, if required */
624 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
626 vlib_increment_combined_counter (im->combined_sw_if_counters +
627 VNET_INTERFACE_COUNTER_TX,
628 thread_index, tx_swif0, 1,
632 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
635 vlib_increment_combined_counter (im->combined_sw_if_counters +
636 VNET_INTERFACE_COUNTER_TX,
637 thread_index, tx_swif1, 1,
641 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
644 vlib_increment_combined_counter (im->combined_sw_if_counters +
645 VNET_INTERFACE_COUNTER_TX,
646 thread_index, tx_swif2, 1,
649 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
652 vlib_increment_combined_counter (im->combined_sw_if_counters +
653 VNET_INTERFACE_COUNTER_TX,
654 thread_index, tx_swif3, 1,
658 if (!do_segmentation)
659 or_flags = b0->flags | b1->flags | b2->flags | b3->flags;
664 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
665 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
666 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
668 calc_checksums (vm, b0);
669 calc_checksums (vm, b1);
670 calc_checksums (vm, b2);
671 calc_checksums (vm, b3);
676 while (from + 1 <= from_end && n_left_to_tx >= 1)
688 b0 = vlib_get_buffer (vm, bi0);
690 /* Be grumpy about zero length buffers for benefit of
691 driver tx function. */
692 ASSERT (b0->current_length > 0);
694 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
695 tx_swif0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
696 n_bytes += n_bytes_b0;
699 if (PREDICT_FALSE (current_config_index != ~0))
701 vnet_buffer (b0)->feature_arc_index = arc;
702 b0->current_config_index = current_config_index;
707 if (PREDICT_FALSE (b0->flags & VNET_BUFFER_F_GSO))
710 * Undo the enqueue of the b0 - it is not going anywhere,
711 * and will be freed either after it's segmented or
712 * when dropped, if there is no buffers to segment into.
716 /* undo the counting. */
717 n_bytes -= n_bytes_b0;
723 tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b0,
726 if (PREDICT_FALSE (n_tx_bytes == 0))
728 drop_one_buffer_and_count (vm, vnm, node, from - 1,
729 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
733 u16 n_tx_bufs = vec_len (ptd->split_buffers);
734 u32 *from_tx_seg = ptd->split_buffers;
736 while (n_tx_bufs > 0)
738 if (n_tx_bufs >= n_left_to_tx)
740 while (n_left_to_tx > 0)
742 to_tx[0] = from_tx_seg[0];
749 vlib_put_next_frame (vm, node, next_index,
751 vlib_get_new_next_frame (vm, node, next_index,
752 to_tx, n_left_to_tx);
756 while (n_tx_bufs > 0)
758 to_tx[0] = from_tx_seg[0];
767 n_bytes += n_tx_bytes;
768 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
771 vlib_increment_combined_counter
772 (im->combined_sw_if_counters +
773 VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
774 _vec_len (ptd->split_buffers), n_tx_bytes);
776 /* The buffers were enqueued. Reset the length */
777 _vec_len (ptd->split_buffers) = 0;
778 /* Free the now segmented buffer */
779 vlib_buffer_free_one (vm, bi0);
784 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
787 vlib_increment_combined_counter (im->combined_sw_if_counters +
788 VNET_INTERFACE_COUNTER_TX,
789 thread_index, tx_swif0, 1,
794 calc_checksums (vm, b0);
797 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
800 /* Update main interface stats. */
801 vlib_increment_combined_counter (im->combined_sw_if_counters
802 + VNET_INTERFACE_COUNTER_TX,
804 rt->sw_if_index, n_packets, n_bytes);
807 #endif /* CLIB_MARCH_VARIANT */
809 static_always_inline void vnet_interface_pcap_tx_trace
810 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
811 int sw_if_index_from_buffer)
813 u32 n_left_from, *from;
816 if (PREDICT_TRUE (vm->pcap[VLIB_TX].pcap_enable == 0))
819 if (sw_if_index_from_buffer == 0)
821 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
822 sw_if_index = rt->sw_if_index;
827 n_left_from = frame->n_vectors;
828 from = vlib_frame_vector_args (frame);
830 while (n_left_from > 0)
833 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
835 if (sw_if_index_from_buffer)
836 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
838 if (vm->pcap[VLIB_TX].pcap_sw_if_index == 0 ||
839 vm->pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
840 pcap_add_buffer (&vm->pcap[VLIB_TX].pcap_main, vm, bi0, 512);
846 #ifndef CLIB_MARCH_VARIANT
847 static_always_inline uword
848 vnet_interface_output_node_inline (vlib_main_t * vm,
849 vlib_node_runtime_t * node,
850 vlib_frame_t * frame, vnet_main_t * vnm,
851 vnet_hw_interface_t * hi,
855 * The 3-headed "if" is here because we want to err on the side
856 * of not impacting the non-GSO performance - so for the more
857 * common case of no GSO interfaces we want to prevent the
858 * segmentation codepath from being there altogether.
860 if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
861 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
863 /* do_segmentation */ 0);
864 else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
865 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
867 /* do_segmentation */ 0);
869 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
871 /* do_segmentation */ 1);
875 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
876 vlib_frame_t * frame)
878 vnet_main_t *vnm = vnet_get_main ();
879 vnet_hw_interface_t *hi;
880 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
881 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
883 vnet_interface_pcap_tx_trace (vm, node, frame,
884 0 /* sw_if_index_from_buffer */ );
886 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
887 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
888 /* do_tx_offloads */ 0);
890 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
891 /* do_tx_offloads */ 1);
893 #endif /* CLIB_MARCH_VARIANT */
895 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
896 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
897 vlib_node_runtime_t *
899 vlib_frame_t * frame)
901 vnet_main_t *vnm = vnet_get_main ();
902 u32 n_left_to_next, *from, *to_next;
903 u32 n_left_from, next_index;
905 vnet_interface_pcap_tx_trace (vm, node, frame,
906 1 /* sw_if_index_from_buffer */ );
908 n_left_from = frame->n_vectors;
910 from = vlib_frame_vector_args (frame);
911 next_index = node->cached_next_index;
913 while (n_left_from > 0)
915 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
917 while (n_left_from >= 4 && n_left_to_next >= 2)
919 u32 bi0, bi1, next0, next1;
920 vlib_buffer_t *b0, *b1;
921 vnet_hw_interface_t *hi0, *hi1;
923 /* Prefetch next iteration. */
924 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
925 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
936 b0 = vlib_get_buffer (vm, bi0);
937 b1 = vlib_get_buffer (vm, bi1);
940 vnet_get_sup_hw_interface (vnm,
941 vnet_buffer (b0)->sw_if_index
944 vnet_get_sup_hw_interface (vnm,
945 vnet_buffer (b1)->sw_if_index
948 next0 = hi0->output_node_next_index;
949 next1 = hi1->output_node_next_index;
951 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
952 n_left_to_next, bi0, bi1, next0,
956 while (n_left_from > 0 && n_left_to_next > 0)
960 vnet_hw_interface_t *hi0;
969 b0 = vlib_get_buffer (vm, bi0);
972 vnet_get_sup_hw_interface (vnm,
973 vnet_buffer (b0)->sw_if_index
976 next0 = hi0->output_node_next_index;
978 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
979 n_left_to_next, bi0, next0);
982 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
985 return frame->n_vectors;
988 typedef struct vnet_error_trace_t_
991 } vnet_error_trace_t;
995 format_vnet_error_trace (u8 * s, va_list * va)
997 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
998 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
999 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
1001 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
1002 vnet_get_main (), t->sw_if_index);
1008 interface_trace_buffers (vlib_main_t * vm,
1009 vlib_node_runtime_t * node, vlib_frame_t * frame)
1011 u32 n_left, *buffers;
1013 buffers = vlib_frame_vector_args (frame);
1014 n_left = frame->n_vectors;
1019 vlib_buffer_t *b0, *b1;
1020 vnet_error_trace_t *t0, *t1;
1022 /* Prefetch next iteration. */
1023 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
1024 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
1029 b0 = vlib_get_buffer (vm, bi0);
1030 b1 = vlib_get_buffer (vm, bi1);
1032 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1034 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1035 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1037 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1039 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1040 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
1050 vnet_error_trace_t *t0;
1054 b0 = vlib_get_buffer (vm, bi0);
1056 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1058 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1059 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1068 VNET_ERROR_DISPOSITION_DROP,
1069 VNET_ERROR_DISPOSITION_PUNT,
1070 VNET_ERROR_N_DISPOSITION,
1071 } vnet_error_disposition_t;
1073 static_always_inline uword
1074 interface_drop_punt (vlib_main_t * vm,
1075 vlib_node_runtime_t * node,
1076 vlib_frame_t * frame,
1077 vnet_error_disposition_t disposition)
1079 u32 *from, n_left, thread_index, *sw_if_index;
1080 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1081 u32 sw_if_indices[VLIB_FRAME_SIZE];
1082 vlib_simple_counter_main_t *cm;
1083 u16 nexts[VLIB_FRAME_SIZE];
1086 vnm = vnet_get_main ();
1087 thread_index = vm->thread_index;
1088 from = vlib_frame_vector_args (frame);
1089 n_left = frame->n_vectors;
1091 sw_if_index = sw_if_indices;
1093 vlib_get_buffers (vm, from, bufs, n_left);
1095 if (node->flags & VLIB_NODE_FLAG_TRACE)
1096 interface_trace_buffers (vm, node, frame);
1098 /* All going to drop regardless, this is just a counting exercise */
1099 clib_memset (nexts, 0, sizeof (nexts));
1101 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1102 (disposition == VNET_ERROR_DISPOSITION_PUNT
1103 ? VNET_INTERFACE_COUNTER_PUNT
1104 : VNET_INTERFACE_COUNTER_DROP));
1106 /* collect the array of interfaces first ... */
1111 /* Prefetch 8 ahead - there's not much going on in each iteration */
1112 vlib_prefetch_buffer_header (b[4], LOAD);
1113 vlib_prefetch_buffer_header (b[5], LOAD);
1114 vlib_prefetch_buffer_header (b[6], LOAD);
1115 vlib_prefetch_buffer_header (b[7], LOAD);
1117 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1118 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1119 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1120 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1128 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1135 /* ... then count against them in blocks */
1136 n_left = frame->n_vectors;
1140 vnet_sw_interface_t *sw_if0;
1143 off = frame->n_vectors - n_left;
1145 sw_if_index = sw_if_indices + off;
1147 count = clib_count_equal_u32 (sw_if_index, n_left);
1150 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1152 /* Increment super-interface drop/punt counters for
1154 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1155 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1156 vlib_increment_simple_counter
1157 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1160 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1162 return frame->n_vectors;
1166 pcap_drop_trace (vlib_main_t * vm,
1167 vnet_interface_main_t * im, vlib_frame_t * f)
1170 u32 n_left = f->n_vectors;
1171 vlib_buffer_t *b0, *p1;
1173 i16 save_current_data;
1174 u16 save_current_length;
1176 from = vlib_frame_vector_args (f);
1180 if (PREDICT_TRUE (n_left > 1))
1182 p1 = vlib_get_buffer (vm, from[1]);
1183 vlib_prefetch_buffer_header (p1, LOAD);
1187 b0 = vlib_get_buffer (vm, bi0);
1191 /* See if we're pointedly ignoring this specific error */
1192 if (im->pcap_drop_filter_hash
1193 && hash_get (im->pcap_drop_filter_hash, b0->error))
1196 /* Trace all drops, or drops received on a specific interface */
1197 if (im->pcap_sw_if_index == 0 ||
1198 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1200 save_current_data = b0->current_data;
1201 save_current_length = b0->current_length;
1204 * Typically, we'll need to rewind the buffer
1206 if (b0->current_data > 0)
1207 vlib_buffer_advance (b0, (word) - b0->current_data);
1209 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1211 b0->current_data = save_current_data;
1212 b0->current_length = save_current_length;
1217 #ifndef CLIB_MARCH_VARIANT
1219 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1221 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1223 if (im->pcap_drop_filter_hash == 0)
1224 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1227 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1229 hash_unset (im->pcap_drop_filter_hash, error_index);
1231 #endif /* CLIB_MARCH_VARIANT */
1233 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1234 vlib_node_runtime_t * node,
1235 vlib_frame_t * frame)
1237 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1239 if (PREDICT_FALSE (im->drop_pcap_enable))
1240 pcap_drop_trace (vm, im, frame);
1242 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1245 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1246 vlib_node_runtime_t * node,
1247 vlib_frame_t * frame)
1249 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1253 VLIB_REGISTER_NODE (interface_drop) = {
1254 .name = "error-drop",
1255 .vector_size = sizeof (u32),
1256 .format_trace = format_vnet_error_trace,
1265 VLIB_REGISTER_NODE (interface_punt) = {
1266 .name = "error-punt",
1267 .vector_size = sizeof (u32),
1268 .format_trace = format_vnet_error_trace,
1277 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1278 .name = "interface-output",
1279 .vector_size = sizeof (u32),
1284 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1285 vlib_frame_t * from_frame)
1287 vnet_main_t *vnm = vnet_get_main ();
1288 u32 last_sw_if_index = ~0;
1289 vlib_frame_t *to_frame = 0;
1290 vnet_hw_interface_t *hw = 0;
1291 u32 *from, *to_next = 0;
1294 from = vlib_frame_vector_args (from_frame);
1295 n_left_from = from_frame->n_vectors;
1296 while (n_left_from > 0)
1305 b0 = vlib_get_buffer (vm, bi0);
1306 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1308 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1312 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1313 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1315 last_sw_if_index = sw_if_index0;
1316 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1317 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1318 to_next = vlib_frame_vector_args (to_frame);
1323 to_frame->n_vectors++;
1325 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1326 return from_frame->n_vectors;
1330 VLIB_REGISTER_NODE (interface_tx, static) = {
1331 .function = interface_tx_node_fn,
1332 .name = "interface-tx",
1333 .vector_size = sizeof (u32),
1340 VNET_FEATURE_ARC_INIT (interface_output, static) =
1342 .arc_name = "interface-output",
1343 .start_nodes = VNET_FEATURES (0),
1344 .last_in_arc = "interface-tx",
1345 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1348 VNET_FEATURE_INIT (span_tx, static) = {
1349 .arc_name = "interface-output",
1350 .node_name = "span-output",
1351 .runs_before = VNET_FEATURES ("interface-tx"),
1354 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1355 .arc_name = "interface-output",
1356 .node_name = "ipsec-if-output",
1357 .runs_before = VNET_FEATURES ("interface-tx"),
1360 VNET_FEATURE_INIT (interface_tx, static) = {
1361 .arc_name = "interface-output",
1362 .node_name = "interface-tx",
1367 #ifndef CLIB_MARCH_VARIANT
1369 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1373 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1376 if (hi->output_node_index == 0)
1379 next_index = vlib_node_add_next
1380 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1381 hi->output_node_index);
1382 hi->output_node_next_index = next_index;
1387 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1388 (vnet_per_buffer_interface_output_hw_interface_add_del);
1391 vnet_set_interface_output_node (vnet_main_t * vnm,
1392 u32 hw_if_index, u32 node_index)
1394 ASSERT (node_index);
1395 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1396 u32 next_index = vlib_node_add_next
1397 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1398 hi->output_node_next_index = next_index;
1399 hi->output_node_index = node_index;
1401 #endif /* CLIB_MARCH_VARIANT */
1403 static clib_error_t *
1404 pcap_drop_trace_command_fn (vlib_main_t * vm,
1405 unformat_input_t * input,
1406 vlib_cli_command_t * cmd)
1408 vnet_main_t *vnm = vnet_get_main ();
1409 vnet_interface_main_t *im = &vnm->interface_main;
1413 clib_error_t *error = 0;
1415 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1417 if (unformat (input, "on"))
1419 if (im->drop_pcap_enable == 0)
1421 if (im->pcap_filename == 0)
1422 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1424 clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1425 im->pcap_main.file_name = (char *) im->pcap_filename;
1426 im->pcap_main.n_packets_to_capture = 100;
1427 if (im->pcap_pkts_to_capture)
1428 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1430 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1431 im->drop_pcap_enable = 1;
1433 vlib_cli_output (vm, "pcap drop capture on...");
1437 vlib_cli_output (vm, "pcap drop capture already on...");
1441 else if (unformat (input, "off"))
1445 if (im->drop_pcap_enable)
1447 vlib_cli_output (vm, "captured %d pkts...",
1448 im->pcap_main.n_packets_captured);
1449 if (im->pcap_main.n_packets_captured)
1451 im->pcap_main.n_packets_to_capture =
1452 im->pcap_main.n_packets_captured;
1453 error = pcap_write (&im->pcap_main);
1455 clib_error_report (error);
1457 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1462 vlib_cli_output (vm, "pcap drop capture already off...");
1465 im->drop_pcap_enable = 0;
1467 else if (unformat (input, "max %d", &max))
1469 im->pcap_pkts_to_capture = max;
1473 else if (unformat (input, "intfc %U",
1474 unformat_vnet_sw_interface, vnm,
1475 &im->pcap_sw_if_index))
1477 else if (unformat (input, "intfc any"))
1479 im->pcap_sw_if_index = 0;
1482 else if (unformat (input, "file %s", &filename))
1484 u8 *chroot_filename;
1485 /* Brain-police user path input */
1486 if (strstr ((char *) filename, "..")
1487 || index ((char *) filename, '/'))
1489 vlib_cli_output (vm, "illegal characters in filename '%s'",
1494 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1495 vec_free (filename);
1497 if (im->pcap_filename)
1498 vec_free (im->pcap_filename);
1499 im->pcap_filename = chroot_filename;
1500 im->pcap_main.file_name = (char *) im->pcap_filename;
1503 else if (unformat (input, "status"))
1505 if (im->drop_pcap_enable == 0)
1507 vlib_cli_output (vm, "pcap drop capture is off...");
1511 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1512 im->pcap_main.n_packets_captured,
1513 im->pcap_main.n_packets_to_capture);
1522 return clib_error_return (0, "unknown input `%U'",
1523 format_unformat_error, input);
1529 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1530 .path = "pcap drop trace",
1532 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1533 .function = pcap_drop_trace_command_fn,
1538 * fd.io coding-style-patch-verification: ON
1541 * eval: (c-set-style "gnu")