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>
46 #include <vnet/classify/trace_classify.h>
54 u8 data[128 - 3 * sizeof (u32)];
56 interface_output_trace_t;
58 #ifndef CLIB_MARCH_VARIANT
60 format_vnet_interface_output_trace (u8 * s, va_list * va)
62 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
63 vlib_node_t *node = va_arg (*va, vlib_node_t *);
64 interface_output_trace_t *t = va_arg (*va, interface_output_trace_t *);
65 vnet_main_t *vnm = vnet_get_main ();
66 vnet_sw_interface_t *si;
69 if (t->sw_if_index != (u32) ~ 0)
71 indent = format_get_indent (s);
73 if (pool_is_free_index
74 (vnm->interface_main.sw_interfaces, t->sw_if_index))
76 /* the interface may have been deleted by the time the trace is printed */
77 s = format (s, "sw_if_index: %d ", t->sw_if_index);
81 si = vnet_get_sw_interface (vnm, t->sw_if_index);
83 format (s, "%U ", format_vnet_sw_interface_name, vnm, si,
86 #define _(bit, name, v, x) \
87 if (v && (t->flags & VNET_BUFFER_F_##name)) \
88 s = format (s, "%s ", v);
89 foreach_vnet_buffer_flag
91 if (t->flags & VNET_BUFFER_F_GSO)
93 s = format (s, "\n%Ugso_sz %d gso_l4_hdr_sz %d",
94 format_white_space, indent + 2, t->gso_size,
98 format (s, "\n%U%U", format_white_space, indent,
99 node->format_buffer ? node->format_buffer : format_hex_bytes,
100 t->data, sizeof (t->data));
106 vnet_interface_output_trace (vlib_main_t * vm,
107 vlib_node_runtime_t * node,
108 vlib_frame_t * frame, uword n_buffers)
113 from = vlib_frame_vector_args (frame);
118 vlib_buffer_t *b0, *b1;
119 interface_output_trace_t *t0, *t1;
121 /* Prefetch next iteration. */
122 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
123 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
128 b0 = vlib_get_buffer (vm, bi0);
129 b1 = vlib_get_buffer (vm, bi1);
131 if (b0->flags & VLIB_BUFFER_IS_TRACED)
133 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
134 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
135 t0->flags = b0->flags;
136 t0->gso_size = vnet_buffer2 (b0)->gso_size;
137 t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
138 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
141 if (b1->flags & VLIB_BUFFER_IS_TRACED)
143 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
144 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_TX];
145 t1->flags = b1->flags;
146 t1->gso_size = vnet_buffer2 (b1)->gso_size;
147 t1->gso_l4_hdr_sz = vnet_buffer2 (b1)->gso_l4_hdr_sz;
148 clib_memcpy_fast (t1->data, vlib_buffer_get_current (b1),
159 interface_output_trace_t *t0;
163 b0 = vlib_get_buffer (vm, bi0);
165 if (b0->flags & VLIB_BUFFER_IS_TRACED)
167 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
168 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
169 t0->flags = b0->flags;
170 t0->gso_size = vnet_buffer2 (b0)->gso_size;
171 t0->gso_l4_hdr_sz = vnet_buffer2 (b0)->gso_l4_hdr_sz;
172 clib_memcpy_fast (t0->data, vlib_buffer_get_current (b0),
180 static_always_inline void
181 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 th = (tcp_header_t *) (b->data + vnet_buffer (b)->l4_hdr_offset);
192 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 else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
207 uh->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
214 ip6 = (ip6_header_t *) (b->data + vnet_buffer (b)->l3_hdr_offset);
215 if (b->flags & VNET_BUFFER_F_OFFLOAD_TCP_CKSUM)
219 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
221 else if (b->flags & VNET_BUFFER_F_OFFLOAD_UDP_CKSUM)
225 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, u32 n_bytes_b0, u16 l234_sz,
240 clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz
243 /* rounded-up division */
244 u16 n_bufs = (n_bytes_b0 - l234_sz + (size - 1)) / size;
248 vec_validate (ptd->split_buffers, n_bufs - 1);
250 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
251 if (n_alloc < n_bufs)
253 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
259 static_always_inline void
260 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
261 u32 flags, u16 length)
263 nb0->current_data = b0->current_data;
264 nb0->total_length_not_including_first_buffer = 0;
265 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
266 nb0->trace_handle = b0->trace_handle;
267 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
268 clib_memcpy_fast (vlib_buffer_get_current (nb0),
269 vlib_buffer_get_current (b0), length);
270 nb0->current_length = length;
273 static_always_inline void
274 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
275 vlib_buffer_t * b0, u16 template_data_sz,
276 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
277 u32 next_tcp_seq, u32 flags)
279 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
283 vlib_buffer_get_default_data_size (vm) - (template_data_sz +
285 *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
288 (tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset);
289 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
292 static_always_inline void
293 tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6)
295 u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
296 u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
297 ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset);
298 ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset);
299 tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset);
301 tcp->flags = tcp_flags;
304 ip6->payload_length =
305 clib_host_to_net_u16 (b0->current_length -
306 (l4_hdr_offset - b0->current_data));
309 clib_host_to_net_u16 (b0->current_length -
310 (l3_hdr_offset - b0->current_data));
314 * Allocate the necessary number of ptd->split_buffers,
315 * and segment the possibly chained buffer(s) from b0 into
318 * Return the cumulative number of bytes sent or zero
319 * if allocation failed.
322 static_always_inline u32
323 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
324 int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0,
328 int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4;
329 int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6;
330 ASSERT (is_ip4 || is_ip6);
331 ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID);
332 ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID);
333 ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
334 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
336 int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz;
337 u8 save_tcp_flags = 0;
338 u8 tcp_flags_no_fin_psh = 0;
339 u32 next_tcp_seq = 0;
342 (tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset);
343 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
344 /* store original flags for last packet and reset FIN and PSH */
345 save_tcp_flags = tcp->flags;
346 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
350 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
351 u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz
353 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
354 next_tcp_seq += first_data_size;
357 (!tso_alloc_tx_bufs (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size)))
360 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
361 tso_init_buf_from_template_base (b0, sb0, default_bflags,
362 l234_sz + first_data_size);
364 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
367 /* Need to copy more segments */
368 u8 *src_ptr, *dst_ptr;
369 u16 src_left, dst_left;
370 /* current source buffer */
371 vlib_buffer_t *csb0 = sb0;
373 /* current dest buffer */
375 u16 dbi = 1; /* the buffer [0] is b0 */
377 src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
378 src_left = sb0->current_length - l234_sz - first_data_size;
380 tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
382 calc_checksums (vm, b0);
384 /* grab a second buffer and prepare the loop */
385 ASSERT (dbi < vec_len (ptd->split_buffers));
386 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
387 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
388 &dst_left, next_tcp_seq, default_bflags);
390 /* an arbitrary large number to catch the runaway loops */
392 while (total_src_left)
395 clib_panic ("infinite loop detected");
396 u16 bytes_to_copy = clib_min (src_left, dst_left);
398 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
400 src_left -= bytes_to_copy;
401 src_ptr += bytes_to_copy;
402 total_src_left -= bytes_to_copy;
403 dst_left -= bytes_to_copy;
404 dst_ptr += bytes_to_copy;
405 next_tcp_seq += bytes_to_copy;
406 cdb0->current_length += bytes_to_copy;
410 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
411 u32 next_bi = csb0->next_buffer;
413 /* init src to the next buffer in chain */
417 csb0 = vlib_get_buffer (vm, csbi0);
418 src_left = csb0->current_length;
419 src_ptr = vlib_buffer_get_current (csb0);
423 ASSERT (total_src_left == 0);
427 if (0 == dst_left && total_src_left)
430 calc_checksums (vm, cdb0);
431 n_tx_bytes += cdb0->current_length;
432 ASSERT (dbi < vec_len (ptd->split_buffers));
433 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
434 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
435 gso_size, &dst_ptr, &dst_left,
436 next_tcp_seq, default_bflags);
440 tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
442 calc_checksums (vm, cdb0);
444 n_tx_bytes += cdb0->current_length;
446 n_tx_bytes += b0->current_length;
450 static_always_inline void
451 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
452 vlib_node_runtime_t * node, u32 * pbi0,
455 u32 thread_index = vm->thread_index;
456 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
458 vlib_simple_counter_main_t *cm;
460 vec_elt_at_index (vnm->interface_main.sw_if_counters,
461 VNET_INTERFACE_COUNTER_TX_ERROR);
462 vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
464 vlib_error_drop_buffers (vm, node, pbi0,
465 /* buffer stride */ 1,
467 VNET_INTERFACE_OUTPUT_NEXT_DROP,
468 node->node_index, drop_error_code);
471 static_always_inline uword
472 vnet_interface_output_node_inline_gso (vlib_main_t * vm,
473 vlib_node_runtime_t * node,
474 vlib_frame_t * frame,
476 vnet_hw_interface_t * hi,
480 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
481 vnet_sw_interface_t *si;
482 u32 n_left_to_tx, *from, *from_end, *to_tx;
483 u32 n_bytes, n_buffers, n_packets;
484 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
485 u32 thread_index = vm->thread_index;
486 vnet_interface_main_t *im = &vnm->interface_main;
487 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
488 u32 current_config_index = ~0;
489 u8 arc = im->output_feature_arc_index;
490 vnet_interface_per_thread_data_t *ptd =
491 vec_elt_at_index (im->per_thread_data, thread_index);
492 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
494 n_buffers = frame->n_vectors;
496 if (node->flags & VLIB_NODE_FLAG_TRACE)
497 vnet_interface_output_trace (vm, node, frame, n_buffers);
499 from = vlib_frame_vector_args (frame);
500 vlib_get_buffers (vm, from, b, n_buffers);
503 return vlib_error_drop_buffers (vm, node, from,
504 /* buffer stride */ 1,
506 VNET_INTERFACE_OUTPUT_NEXT_DROP,
508 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
510 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
511 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
512 if (!(si->flags & VNET_SW_INTERFACE_FLAG_ADMIN_UP) ||
513 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
515 vlib_simple_counter_main_t *cm;
517 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
518 VNET_INTERFACE_COUNTER_TX_ERROR);
519 vlib_increment_simple_counter (cm, thread_index,
520 rt->sw_if_index, n_buffers);
522 return vlib_error_drop_buffers (vm, node, from,
523 /* buffer stride */ 1,
525 VNET_INTERFACE_OUTPUT_NEXT_DROP,
527 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
530 from_end = from + n_buffers;
532 /* Total byte count of all buffers. */
536 /* interface-output feature arc handling */
537 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
539 vnet_feature_config_main_t *fcm;
540 fcm = vnet_feature_get_config_main (arc);
541 current_config_index = vnet_get_feature_config_index (arc,
543 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
547 while (from < from_end)
549 /* Get new next frame since previous incomplete frame may have less
550 than VNET_FRAME_SIZE vectors in it. */
551 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
553 while (from + 8 <= from_end && n_left_to_tx >= 4)
555 u32 bi0, bi1, bi2, bi3;
556 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
559 /* Prefetch next iteration. */
560 vlib_prefetch_buffer_header (b[4], LOAD);
561 vlib_prefetch_buffer_header (b[5], LOAD);
562 vlib_prefetch_buffer_header (b[6], LOAD);
563 vlib_prefetch_buffer_header (b[7], LOAD);
574 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
578 /* go to single loop if we need TSO segmentation */
579 if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
586 /* Be grumpy about zero length buffers for benefit of
587 driver tx function. */
588 ASSERT (b[0]->current_length > 0);
589 ASSERT (b[1]->current_length > 0);
590 ASSERT (b[2]->current_length > 0);
591 ASSERT (b[3]->current_length > 0);
593 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
594 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
595 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
596 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
597 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
598 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
599 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
600 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
602 n_bytes += n_bytes_b0 + n_bytes_b1;
603 n_bytes += n_bytes_b2 + n_bytes_b3;
606 if (PREDICT_FALSE (current_config_index != ~0))
608 vnet_buffer (b[0])->feature_arc_index = arc;
609 vnet_buffer (b[1])->feature_arc_index = arc;
610 vnet_buffer (b[2])->feature_arc_index = arc;
611 vnet_buffer (b[3])->feature_arc_index = arc;
612 b[0]->current_config_index = current_config_index;
613 b[1]->current_config_index = current_config_index;
614 b[2]->current_config_index = current_config_index;
615 b[3]->current_config_index = current_config_index;
618 /* update vlan subif tx counts, if required */
619 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
621 vlib_increment_combined_counter (im->combined_sw_if_counters +
622 VNET_INTERFACE_COUNTER_TX,
623 thread_index, tx_swif0, 1,
627 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
630 vlib_increment_combined_counter (im->combined_sw_if_counters +
631 VNET_INTERFACE_COUNTER_TX,
632 thread_index, tx_swif1, 1,
636 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
639 vlib_increment_combined_counter (im->combined_sw_if_counters +
640 VNET_INTERFACE_COUNTER_TX,
641 thread_index, tx_swif2, 1,
644 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
647 vlib_increment_combined_counter (im->combined_sw_if_counters +
648 VNET_INTERFACE_COUNTER_TX,
649 thread_index, tx_swif3, 1,
656 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
657 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
658 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
660 calc_checksums (vm, b[0]);
661 calc_checksums (vm, b[1]);
662 calc_checksums (vm, b[2]);
663 calc_checksums (vm, b[3]);
670 while (from + 1 <= from_end && n_left_to_tx >= 1)
681 /* Be grumpy about zero length buffers for benefit of
682 driver tx function. */
683 ASSERT (b[0]->current_length > 0);
685 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
686 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
687 n_bytes += n_bytes_b0;
690 if (PREDICT_FALSE (current_config_index != ~0))
692 vnet_buffer (b[0])->feature_arc_index = arc;
693 b[0]->current_config_index = current_config_index;
698 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
701 * Undo the enqueue of the b0 - it is not going anywhere,
702 * and will be freed either after it's segmented or
703 * when dropped, if there is no buffers to segment into.
707 /* undo the counting. */
708 n_bytes -= n_bytes_b0;
714 tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b[0],
717 if (PREDICT_FALSE (n_tx_bytes == 0))
719 drop_one_buffer_and_count (vm, vnm, node, from - 1,
720 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
725 u16 n_tx_bufs = vec_len (ptd->split_buffers);
726 u32 *from_tx_seg = ptd->split_buffers;
728 while (n_tx_bufs > 0)
730 if (n_tx_bufs >= n_left_to_tx)
732 while (n_left_to_tx > 0)
734 to_tx[0] = from_tx_seg[0];
741 vlib_put_next_frame (vm, node, next_index,
743 vlib_get_new_next_frame (vm, node, next_index,
744 to_tx, n_left_to_tx);
746 while (n_tx_bufs > 0)
748 to_tx[0] = from_tx_seg[0];
756 n_bytes += n_tx_bytes;
757 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
760 vlib_increment_combined_counter
761 (im->combined_sw_if_counters +
762 VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
763 _vec_len (ptd->split_buffers), n_tx_bytes);
765 /* The buffers were enqueued. Reset the length */
766 _vec_len (ptd->split_buffers) = 0;
767 /* Free the now segmented buffer */
768 vlib_buffer_free_one (vm, bi0);
774 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
777 vlib_increment_combined_counter (im->combined_sw_if_counters +
778 VNET_INTERFACE_COUNTER_TX,
779 thread_index, tx_swif0, 1,
784 calc_checksums (vm, b[0]);
789 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
792 /* Update main interface stats. */
793 vlib_increment_combined_counter (im->combined_sw_if_counters
794 + VNET_INTERFACE_COUNTER_TX,
796 rt->sw_if_index, n_packets, n_bytes);
799 #endif /* CLIB_MARCH_VARIANT */
801 static_always_inline void vnet_interface_pcap_tx_trace
802 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
803 int sw_if_index_from_buffer)
805 u32 n_left_from, *from;
807 vnet_pcap_t *pp = &vlib_global_main.pcap;
809 if (PREDICT_TRUE (pp->pcap_tx_enable == 0))
812 if (sw_if_index_from_buffer == 0)
814 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
815 sw_if_index = rt->sw_if_index;
820 n_left_from = frame->n_vectors;
821 from = vlib_frame_vector_args (frame);
823 while (n_left_from > 0)
825 int classify_filter_result;
827 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
831 if (pp->filter_classify_table_index != ~0)
833 classify_filter_result =
834 vnet_is_packet_traced_inline
835 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
836 if (classify_filter_result)
837 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
841 if (sw_if_index_from_buffer)
842 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
844 if (pp->pcap_sw_if_index == 0 || pp->pcap_sw_if_index == sw_if_index)
845 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
849 #ifndef CLIB_MARCH_VARIANT
850 static_always_inline uword
851 vnet_interface_output_node_inline (vlib_main_t * vm,
852 vlib_node_runtime_t * node,
853 vlib_frame_t * frame, vnet_main_t * vnm,
854 vnet_hw_interface_t * hi,
858 * The 3-headed "if" is here because we want to err on the side
859 * of not impacting the non-GSO performance - so for the more
860 * common case of no GSO interfaces we want to prevent the
861 * segmentation codepath from being there altogether.
863 if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
864 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
866 /* do_segmentation */ 0);
867 else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
868 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
870 /* do_segmentation */ 0);
872 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
874 /* do_segmentation */ 1);
878 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
879 vlib_frame_t * frame)
881 vnet_main_t *vnm = vnet_get_main ();
882 vnet_hw_interface_t *hi;
883 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
884 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
886 vnet_interface_pcap_tx_trace (vm, node, frame,
887 0 /* sw_if_index_from_buffer */ );
889 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
890 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
891 /* do_tx_offloads */ 0);
893 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
894 /* do_tx_offloads */ 1);
896 #endif /* CLIB_MARCH_VARIANT */
898 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
899 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
900 vlib_node_runtime_t *
902 vlib_frame_t * frame)
904 vnet_main_t *vnm = vnet_get_main ();
905 u32 n_left_to_next, *from, *to_next;
906 u32 n_left_from, next_index;
908 vnet_interface_pcap_tx_trace (vm, node, frame,
909 1 /* sw_if_index_from_buffer */ );
911 n_left_from = frame->n_vectors;
913 from = vlib_frame_vector_args (frame);
914 next_index = node->cached_next_index;
916 while (n_left_from > 0)
918 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
920 while (n_left_from >= 4 && n_left_to_next >= 2)
922 u32 bi0, bi1, next0, next1;
923 vlib_buffer_t *b0, *b1;
924 vnet_hw_interface_t *hi0, *hi1;
926 /* Prefetch next iteration. */
927 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
928 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
939 b0 = vlib_get_buffer (vm, bi0);
940 b1 = vlib_get_buffer (vm, bi1);
943 vnet_get_sup_hw_interface (vnm,
944 vnet_buffer (b0)->sw_if_index
947 vnet_get_sup_hw_interface (vnm,
948 vnet_buffer (b1)->sw_if_index
951 next0 = hi0->output_node_next_index;
952 next1 = hi1->output_node_next_index;
954 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
955 n_left_to_next, bi0, bi1, next0,
959 while (n_left_from > 0 && n_left_to_next > 0)
963 vnet_hw_interface_t *hi0;
972 b0 = vlib_get_buffer (vm, bi0);
975 vnet_get_sup_hw_interface (vnm,
976 vnet_buffer (b0)->sw_if_index
979 next0 = hi0->output_node_next_index;
981 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
982 n_left_to_next, bi0, next0);
985 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
988 return frame->n_vectors;
991 typedef struct vnet_error_trace_t_
994 } vnet_error_trace_t;
998 format_vnet_error_trace (u8 * s, va_list * va)
1000 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
1001 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
1002 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
1004 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
1005 vnet_get_main (), t->sw_if_index);
1011 interface_trace_buffers (vlib_main_t * vm,
1012 vlib_node_runtime_t * node, vlib_frame_t * frame)
1014 u32 n_left, *buffers;
1016 buffers = vlib_frame_vector_args (frame);
1017 n_left = frame->n_vectors;
1022 vlib_buffer_t *b0, *b1;
1023 vnet_error_trace_t *t0, *t1;
1025 /* Prefetch next iteration. */
1026 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
1027 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
1032 b0 = vlib_get_buffer (vm, bi0);
1033 b1 = vlib_get_buffer (vm, bi1);
1035 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1037 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1038 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1040 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1042 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1043 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
1053 vnet_error_trace_t *t0;
1057 b0 = vlib_get_buffer (vm, bi0);
1059 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1061 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1062 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1071 VNET_ERROR_DISPOSITION_DROP,
1072 VNET_ERROR_DISPOSITION_PUNT,
1073 VNET_ERROR_N_DISPOSITION,
1074 } vnet_error_disposition_t;
1076 static_always_inline uword
1077 interface_drop_punt (vlib_main_t * vm,
1078 vlib_node_runtime_t * node,
1079 vlib_frame_t * frame,
1080 vnet_error_disposition_t disposition)
1082 u32 *from, n_left, thread_index, *sw_if_index;
1083 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1084 u32 sw_if_indices[VLIB_FRAME_SIZE];
1085 vlib_simple_counter_main_t *cm;
1086 u16 nexts[VLIB_FRAME_SIZE];
1089 vnm = vnet_get_main ();
1090 thread_index = vm->thread_index;
1091 from = vlib_frame_vector_args (frame);
1092 n_left = frame->n_vectors;
1094 sw_if_index = sw_if_indices;
1096 vlib_get_buffers (vm, from, bufs, n_left);
1098 if (node->flags & VLIB_NODE_FLAG_TRACE)
1099 interface_trace_buffers (vm, node, frame);
1101 /* All going to drop regardless, this is just a counting exercise */
1102 clib_memset (nexts, 0, sizeof (nexts));
1104 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1105 (disposition == VNET_ERROR_DISPOSITION_PUNT
1106 ? VNET_INTERFACE_COUNTER_PUNT
1107 : VNET_INTERFACE_COUNTER_DROP));
1109 /* collect the array of interfaces first ... */
1114 /* Prefetch 8 ahead - there's not much going on in each iteration */
1115 vlib_prefetch_buffer_header (b[4], LOAD);
1116 vlib_prefetch_buffer_header (b[5], LOAD);
1117 vlib_prefetch_buffer_header (b[6], LOAD);
1118 vlib_prefetch_buffer_header (b[7], LOAD);
1120 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1121 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1122 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1123 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1131 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1138 /* ... then count against them in blocks */
1139 n_left = frame->n_vectors;
1143 vnet_sw_interface_t *sw_if0;
1146 off = frame->n_vectors - n_left;
1148 sw_if_index = sw_if_indices + off;
1150 count = clib_count_equal_u32 (sw_if_index, n_left);
1153 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1155 /* Increment super-interface drop/punt counters for
1157 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1158 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1159 vlib_increment_simple_counter
1160 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1163 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1165 return frame->n_vectors;
1169 pcap_drop_trace (vlib_main_t * vm,
1170 vnet_interface_main_t * im,
1171 vnet_pcap_t * pp, vlib_frame_t * f)
1174 u32 n_left = f->n_vectors;
1175 vlib_buffer_t *b0, *p1;
1177 i16 save_current_data;
1178 u16 save_current_length;
1179 vlib_error_main_t *em = &vm->error_main;
1183 from = vlib_frame_vector_args (f);
1187 if (PREDICT_TRUE (n_left > 1))
1189 p1 = vlib_get_buffer (vm, from[1]);
1190 vlib_prefetch_buffer_header (p1, LOAD);
1194 b0 = vlib_get_buffer (vm, bi0);
1198 /* See if we're pointedly ignoring this specific error */
1199 if (im->pcap_drop_filter_hash
1200 && hash_get (im->pcap_drop_filter_hash, b0->error))
1203 do_trace = (pp->pcap_sw_if_index == 0) ||
1204 pp->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX];
1207 (do_trace == 0 && pp->filter_classify_table_index != ~0))
1209 do_trace = vnet_is_packet_traced_inline
1210 (b0, pp->filter_classify_table_index, 0 /* full classify */ );
1213 /* Trace all drops, or drops received on a specific interface */
1216 save_current_data = b0->current_data;
1217 save_current_length = b0->current_length;
1220 * Typically, we'll need to rewind the buffer
1221 * if l2_hdr_offset is valid, make sure to rewind to the start of
1222 * the L2 header. This may not be the buffer start in case we pop-ed
1224 * Otherwise, rewind to buffer start and hope for the best.
1226 if (b0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID)
1228 if (b0->current_data > vnet_buffer (b0)->l2_hdr_offset)
1229 vlib_buffer_advance (b0,
1230 vnet_buffer (b0)->l2_hdr_offset -
1233 else if (b0->current_data > 0)
1234 vlib_buffer_advance (b0, (word) - b0->current_data);
1237 vlib_buffer_t *last = b0;
1238 u32 error_node_index;
1239 int drop_string_len;
1241 /* Length of the error string */
1242 int error_string_len =
1243 clib_strnlen (em->error_strings_heap[b0->error], 128);
1245 /* Dig up the drop node */
1246 error_node_index = vm->node_main.node_by_error[b0->error];
1247 n = vlib_get_node (vm, error_node_index);
1249 /* Length of full drop string, w/ "nodename: " prepended */
1250 drop_string_len = error_string_len + vec_len (n->name) + 2;
1252 /* Find the last buffer in the chain */
1253 while (last->flags & VLIB_BUFFER_NEXT_PRESENT)
1254 last = vlib_get_buffer (vm, last->next_buffer);
1257 * Append <nodename>: <error-string> to the capture,
1258 * only if we can do that without allocating a new buffer.
1260 if (PREDICT_TRUE ((last->current_data + last->current_length)
1261 < (VLIB_BUFFER_DEFAULT_DATA_SIZE
1262 - drop_string_len)))
1264 clib_memcpy_fast (last->data + last->current_data +
1265 last->current_length, n->name,
1267 clib_memcpy_fast (last->data + last->current_data +
1268 last->current_length + vec_len (n->name),
1270 clib_memcpy_fast (last->data + last->current_data +
1271 last->current_length + vec_len (n->name) +
1272 2, em->error_strings_heap[b0->error],
1274 last->current_length += drop_string_len;
1275 b0->flags &= ~(VLIB_BUFFER_TOTAL_LENGTH_VALID);
1276 pcap_add_buffer (&pp->pcap_main, vm, bi0,
1277 pp->max_bytes_per_pkt);
1278 last->current_length -= drop_string_len;
1279 b0->current_data = save_current_data;
1280 b0->current_length = save_current_length;
1286 * Didn't have space in the last buffer, here's the dropped
1289 pcap_add_buffer (&pp->pcap_main, vm, bi0, pp->max_bytes_per_pkt);
1291 b0->current_data = save_current_data;
1292 b0->current_length = save_current_length;
1297 #ifndef CLIB_MARCH_VARIANT
1299 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1301 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1303 if (im->pcap_drop_filter_hash == 0)
1304 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1307 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1309 hash_unset (im->pcap_drop_filter_hash, error_index);
1311 #endif /* CLIB_MARCH_VARIANT */
1313 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1314 vlib_node_runtime_t * node,
1315 vlib_frame_t * frame)
1317 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1318 vnet_pcap_t *pp = &vlib_global_main.pcap;
1320 if (PREDICT_FALSE (pp->pcap_drop_enable))
1321 pcap_drop_trace (vm, im, pp, frame);
1323 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1326 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1327 vlib_node_runtime_t * node,
1328 vlib_frame_t * frame)
1330 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1334 VLIB_REGISTER_NODE (interface_drop) = {
1335 .name = "error-drop",
1336 .vector_size = sizeof (u32),
1337 .format_trace = format_vnet_error_trace,
1346 VLIB_REGISTER_NODE (interface_punt) = {
1347 .name = "error-punt",
1348 .vector_size = sizeof (u32),
1349 .format_trace = format_vnet_error_trace,
1358 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1359 .name = "interface-output",
1360 .vector_size = sizeof (u32),
1365 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1366 vlib_frame_t * from_frame)
1368 vnet_main_t *vnm = vnet_get_main ();
1369 u32 last_sw_if_index = ~0;
1370 vlib_frame_t *to_frame = 0;
1371 vnet_hw_interface_t *hw = 0;
1372 u32 *from, *to_next = 0;
1375 from = vlib_frame_vector_args (from_frame);
1376 n_left_from = from_frame->n_vectors;
1377 while (n_left_from > 0)
1386 b0 = vlib_get_buffer (vm, bi0);
1387 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1389 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1393 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1394 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1396 last_sw_if_index = sw_if_index0;
1397 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1398 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1399 to_next = vlib_frame_vector_args (to_frame);
1404 to_frame->n_vectors++;
1406 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1407 return from_frame->n_vectors;
1411 VLIB_REGISTER_NODE (interface_tx) = {
1412 .function = interface_tx_node_fn,
1413 .name = "interface-tx",
1414 .vector_size = sizeof (u32),
1421 VNET_FEATURE_ARC_INIT (interface_output, static) =
1423 .arc_name = "interface-output",
1424 .start_nodes = VNET_FEATURES (0),
1425 .last_in_arc = "interface-tx",
1426 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1429 VNET_FEATURE_INIT (span_tx, static) = {
1430 .arc_name = "interface-output",
1431 .node_name = "span-output",
1432 .runs_before = VNET_FEATURES ("interface-tx"),
1435 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1436 .arc_name = "interface-output",
1437 .node_name = "ipsec-if-output",
1438 .runs_before = VNET_FEATURES ("interface-tx"),
1441 VNET_FEATURE_INIT (interface_tx, static) = {
1442 .arc_name = "interface-output",
1443 .node_name = "interface-tx",
1448 #ifndef CLIB_MARCH_VARIANT
1450 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1454 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1457 if (hi->output_node_index == 0)
1460 next_index = vlib_node_add_next
1461 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1462 hi->output_node_index);
1463 hi->output_node_next_index = next_index;
1468 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1469 (vnet_per_buffer_interface_output_hw_interface_add_del);
1472 vnet_set_interface_output_node (vnet_main_t * vnm,
1473 u32 hw_if_index, u32 node_index)
1475 ASSERT (node_index);
1476 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1477 u32 next_index = vlib_node_add_next
1478 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1479 hi->output_node_next_index = next_index;
1480 hi->output_node_index = node_index;
1482 #endif /* CLIB_MARCH_VARIANT */
1485 * fd.io coding-style-patch-verification: ON
1488 * eval: (c-set-style "gnu")