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);
229 static_always_inline u16
230 tso_alloc_tx_bufs (vlib_main_t * vm,
231 vnet_interface_per_thread_data_t * ptd,
232 vlib_buffer_t * b0, u16 l4_hdr_sz)
234 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b0);
235 u16 gso_size = vnet_buffer2 (b0)->gso_size;
236 u16 l234_sz = vnet_buffer (b0)->l4_hdr_offset + l4_hdr_sz;
237 /* rounded-up division */
238 u16 n_bufs = (n_bytes_b0 - l234_sz + (gso_size - 1)) / gso_size;
242 vec_validate (ptd->split_buffers, n_bufs - 1);
244 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
245 if (n_alloc < n_bufs)
247 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
253 static_always_inline void
254 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
255 u32 flags, u16 length)
257 nb0->current_data = 0;
258 nb0->total_length_not_including_first_buffer = 0;
259 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
260 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
261 clib_memcpy_fast (nb0->data, b0->data, length);
262 nb0->current_length = length;
265 static_always_inline void
266 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
267 vlib_buffer_t * b0, u16 template_data_sz,
268 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
269 u32 next_tcp_seq, u32 flags)
271 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
275 vlib_buffer_get_default_data_size (vm) - template_data_sz);
276 *p_dst_ptr = nb0->data + template_data_sz;
279 (tcp_header_t *) (nb0->data + vnet_buffer (nb0)->l4_hdr_offset);
280 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
283 static_always_inline void
284 tso_fixup_segmented_buf (vlib_buffer_t * b0, u8 tcp_flags, int is_ip6)
286 u16 l3_hdr_offset = vnet_buffer (b0)->l3_hdr_offset;
287 u16 l4_hdr_offset = vnet_buffer (b0)->l4_hdr_offset;
288 ip4_header_t *ip4 = (ip4_header_t *) (b0->data + l3_hdr_offset);
289 ip6_header_t *ip6 = (ip6_header_t *) (b0->data + l3_hdr_offset);
290 tcp_header_t *tcp = (tcp_header_t *) (b0->data + l4_hdr_offset);
292 tcp->flags = tcp_flags;
295 ip6->payload_length =
296 clib_host_to_net_u16 (b0->current_length -
297 vnet_buffer (b0)->l4_hdr_offset);
300 clib_host_to_net_u16 (b0->current_length -
301 vnet_buffer (b0)->l3_hdr_offset);
305 * Allocate the necessary number of ptd->split_buffers,
306 * and segment the possibly chained buffer(s) from b0 into
309 * Return the cumulative number of bytes sent or zero
310 * if allocation failed.
313 static_always_inline u32
314 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
315 int do_tx_offloads, u32 sbi0, vlib_buffer_t * sb0,
319 int is_ip4 = sb0->flags & VNET_BUFFER_F_IS_IP4;
320 int is_ip6 = sb0->flags & VNET_BUFFER_F_IS_IP6;
321 ASSERT (is_ip4 || is_ip6);
322 ASSERT (sb0->flags & VNET_BUFFER_F_L2_HDR_OFFSET_VALID);
323 ASSERT (sb0->flags & VNET_BUFFER_F_L3_HDR_OFFSET_VALID);
324 ASSERT (sb0->flags & VNET_BUFFER_F_L4_HDR_OFFSET_VALID);
325 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
327 int l4_hdr_sz = vnet_buffer2 (sb0)->gso_l4_hdr_sz;
328 u8 save_tcp_flags = 0;
329 u8 tcp_flags_no_fin_psh = 0;
330 u32 next_tcp_seq = 0;
333 (tcp_header_t *) (sb0->data + vnet_buffer (sb0)->l4_hdr_offset);
334 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
335 /* store original flags for last packet and reset FIN and PSH */
336 save_tcp_flags = tcp->flags;
337 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
341 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
342 u16 l234_sz = vnet_buffer (sb0)->l4_hdr_offset + l4_hdr_sz;
343 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
344 next_tcp_seq += first_data_size;
346 if (PREDICT_FALSE (!tso_alloc_tx_bufs (vm, ptd, sb0, l4_hdr_sz)))
349 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
350 tso_init_buf_from_template_base (b0, sb0, default_bflags,
351 l234_sz + first_data_size);
353 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
356 /* Need to copy more segments */
357 u8 *src_ptr, *dst_ptr;
358 u16 src_left, dst_left;
359 /* current source buffer */
360 vlib_buffer_t *csb0 = sb0;
362 /* current dest buffer */
364 u16 dbi = 1; /* the buffer [0] is b0 */
366 src_ptr = sb0->data + l234_sz + first_data_size;
367 src_left = sb0->current_length - l234_sz - first_data_size;
368 b0->current_length = l234_sz + first_data_size;
370 tso_fixup_segmented_buf (b0, tcp_flags_no_fin_psh, is_ip6);
372 calc_checksums (vm, b0);
374 /* grab a second buffer and prepare the loop */
375 ASSERT (dbi < vec_len (ptd->split_buffers));
376 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
377 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
378 &dst_left, next_tcp_seq, default_bflags);
380 /* an arbitrary large number to catch the runaway loops */
382 while (total_src_left)
385 clib_panic ("infinite loop detected");
386 u16 bytes_to_copy = clib_min (src_left, dst_left);
388 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
390 src_left -= bytes_to_copy;
391 src_ptr += bytes_to_copy;
392 total_src_left -= bytes_to_copy;
393 dst_left -= bytes_to_copy;
394 dst_ptr += bytes_to_copy;
395 next_tcp_seq += bytes_to_copy;
396 cdb0->current_length += bytes_to_copy;
400 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
401 u32 next_bi = csb0->next_buffer;
403 /* init src to the next buffer in chain */
407 csb0 = vlib_get_buffer (vm, csbi0);
408 src_left = csb0->current_length;
409 src_ptr = vlib_buffer_get_current (csb0);
413 ASSERT (total_src_left == 0);
417 if (0 == dst_left && total_src_left)
420 calc_checksums (vm, cdb0);
421 n_tx_bytes += cdb0->current_length;
422 ASSERT (dbi < vec_len (ptd->split_buffers));
423 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
424 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
425 gso_size, &dst_ptr, &dst_left,
426 next_tcp_seq, default_bflags);
430 tso_fixup_segmented_buf (cdb0, save_tcp_flags, is_ip6);
432 calc_checksums (vm, cdb0);
434 n_tx_bytes += cdb0->current_length;
436 n_tx_bytes += b0->current_length;
440 static_always_inline void
441 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
442 vlib_node_runtime_t * node, u32 * pbi0,
445 u32 thread_index = vm->thread_index;
446 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
448 vlib_simple_counter_main_t *cm;
450 vec_elt_at_index (vnm->interface_main.sw_if_counters,
451 VNET_INTERFACE_COUNTER_TX_ERROR);
452 vlib_increment_simple_counter (cm, thread_index, rt->sw_if_index, 1);
454 vlib_error_drop_buffers (vm, node, pbi0,
455 /* buffer stride */ 1,
457 VNET_INTERFACE_OUTPUT_NEXT_DROP,
458 node->node_index, drop_error_code);
461 static_always_inline uword
462 vnet_interface_output_node_inline_gso (vlib_main_t * vm,
463 vlib_node_runtime_t * node,
464 vlib_frame_t * frame,
466 vnet_hw_interface_t * hi,
470 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
471 vnet_sw_interface_t *si;
472 u32 n_left_to_tx, *from, *from_end, *to_tx;
473 u32 n_bytes, n_buffers, n_packets;
474 u32 n_bytes_b0, n_bytes_b1, n_bytes_b2, n_bytes_b3;
475 u32 thread_index = vm->thread_index;
476 vnet_interface_main_t *im = &vnm->interface_main;
477 u32 next_index = VNET_INTERFACE_OUTPUT_NEXT_TX;
478 u32 current_config_index = ~0;
479 u8 arc = im->output_feature_arc_index;
480 vnet_interface_per_thread_data_t *ptd =
481 vec_elt_at_index (im->per_thread_data, thread_index);
482 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
484 n_buffers = frame->n_vectors;
486 if (node->flags & VLIB_NODE_FLAG_TRACE)
487 vnet_interface_output_trace (vm, node, frame, n_buffers);
489 from = vlib_frame_vector_args (frame);
490 vlib_get_buffers (vm, from, b, n_buffers);
493 return vlib_error_drop_buffers (vm, node, from,
494 /* buffer stride */ 1,
496 VNET_INTERFACE_OUTPUT_NEXT_DROP,
498 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DELETED);
500 si = vnet_get_sw_interface (vnm, rt->sw_if_index);
501 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
502 if (!(si->flags & (VNET_SW_INTERFACE_FLAG_ADMIN_UP |
503 VNET_SW_INTERFACE_FLAG_BOND_SLAVE)) ||
504 !(hi->flags & VNET_HW_INTERFACE_FLAG_LINK_UP))
506 vlib_simple_counter_main_t *cm;
508 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
509 VNET_INTERFACE_COUNTER_TX_ERROR);
510 vlib_increment_simple_counter (cm, thread_index,
511 rt->sw_if_index, n_buffers);
513 return vlib_error_drop_buffers (vm, node, from,
514 /* buffer stride */ 1,
516 VNET_INTERFACE_OUTPUT_NEXT_DROP,
518 VNET_INTERFACE_OUTPUT_ERROR_INTERFACE_DOWN);
521 from_end = from + n_buffers;
523 /* Total byte count of all buffers. */
527 /* interface-output feature arc handling */
528 if (PREDICT_FALSE (vnet_have_features (arc, rt->sw_if_index)))
530 vnet_feature_config_main_t *fcm;
531 fcm = vnet_feature_get_config_main (arc);
532 current_config_index = vnet_get_feature_config_index (arc,
534 vnet_get_config_data (&fcm->config_main, ¤t_config_index,
538 while (from < from_end)
540 /* Get new next frame since previous incomplete frame may have less
541 than VNET_FRAME_SIZE vectors in it. */
542 vlib_get_new_next_frame (vm, node, next_index, to_tx, n_left_to_tx);
544 while (from + 8 <= from_end && n_left_to_tx >= 4)
546 u32 bi0, bi1, bi2, bi3;
547 u32 tx_swif0, tx_swif1, tx_swif2, tx_swif3;
550 /* Prefetch next iteration. */
551 vlib_prefetch_buffer_header (b[4], LOAD);
552 vlib_prefetch_buffer_header (b[5], LOAD);
553 vlib_prefetch_buffer_header (b[6], LOAD);
554 vlib_prefetch_buffer_header (b[7], LOAD);
565 or_flags = b[0]->flags | b[1]->flags | b[2]->flags | b[3]->flags;
569 /* go to single loop if we need TSO segmentation */
570 if (PREDICT_FALSE (or_flags & VNET_BUFFER_F_GSO))
577 /* Be grumpy about zero length buffers for benefit of
578 driver tx function. */
579 ASSERT (b[0]->current_length > 0);
580 ASSERT (b[1]->current_length > 0);
581 ASSERT (b[2]->current_length > 0);
582 ASSERT (b[3]->current_length > 0);
584 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
585 n_bytes_b1 = vlib_buffer_length_in_chain (vm, b[1]);
586 n_bytes_b2 = vlib_buffer_length_in_chain (vm, b[2]);
587 n_bytes_b3 = vlib_buffer_length_in_chain (vm, b[3]);
588 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
589 tx_swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
590 tx_swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
591 tx_swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
593 n_bytes += n_bytes_b0 + n_bytes_b1;
594 n_bytes += n_bytes_b2 + n_bytes_b3;
597 if (PREDICT_FALSE (current_config_index != ~0))
599 vnet_buffer (b[0])->feature_arc_index = arc;
600 vnet_buffer (b[1])->feature_arc_index = arc;
601 vnet_buffer (b[2])->feature_arc_index = arc;
602 vnet_buffer (b[3])->feature_arc_index = arc;
603 b[0]->current_config_index = current_config_index;
604 b[1]->current_config_index = current_config_index;
605 b[2]->current_config_index = current_config_index;
606 b[3]->current_config_index = current_config_index;
609 /* update vlan subif tx counts, if required */
610 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
612 vlib_increment_combined_counter (im->combined_sw_if_counters +
613 VNET_INTERFACE_COUNTER_TX,
614 thread_index, tx_swif0, 1,
618 if (PREDICT_FALSE (tx_swif1 != rt->sw_if_index))
621 vlib_increment_combined_counter (im->combined_sw_if_counters +
622 VNET_INTERFACE_COUNTER_TX,
623 thread_index, tx_swif1, 1,
627 if (PREDICT_FALSE (tx_swif2 != rt->sw_if_index))
630 vlib_increment_combined_counter (im->combined_sw_if_counters +
631 VNET_INTERFACE_COUNTER_TX,
632 thread_index, tx_swif2, 1,
635 if (PREDICT_FALSE (tx_swif3 != rt->sw_if_index))
638 vlib_increment_combined_counter (im->combined_sw_if_counters +
639 VNET_INTERFACE_COUNTER_TX,
640 thread_index, tx_swif3, 1,
647 (VNET_BUFFER_F_OFFLOAD_TCP_CKSUM |
648 VNET_BUFFER_F_OFFLOAD_UDP_CKSUM |
649 VNET_BUFFER_F_OFFLOAD_IP_CKSUM))
651 calc_checksums (vm, b[0]);
652 calc_checksums (vm, b[1]);
653 calc_checksums (vm, b[2]);
654 calc_checksums (vm, b[3]);
661 while (from + 1 <= from_end && n_left_to_tx >= 1)
672 /* Be grumpy about zero length buffers for benefit of
673 driver tx function. */
674 ASSERT (b[0]->current_length > 0);
676 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
677 tx_swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
678 n_bytes += n_bytes_b0;
681 if (PREDICT_FALSE (current_config_index != ~0))
683 vnet_buffer (b[0])->feature_arc_index = arc;
684 b[0]->current_config_index = current_config_index;
689 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
692 * Undo the enqueue of the b0 - it is not going anywhere,
693 * and will be freed either after it's segmented or
694 * when dropped, if there is no buffers to segment into.
698 /* undo the counting. */
699 n_bytes -= n_bytes_b0;
705 tso_segment_buffer (vm, ptd, do_tx_offloads, bi0, b[0],
708 if (PREDICT_FALSE (n_tx_bytes == 0))
710 drop_one_buffer_and_count (vm, vnm, node, from - 1,
711 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
716 u16 n_tx_bufs = vec_len (ptd->split_buffers);
717 u32 *from_tx_seg = ptd->split_buffers;
719 while (n_tx_bufs > 0)
721 if (n_tx_bufs >= n_left_to_tx)
723 while (n_left_to_tx > 0)
725 to_tx[0] = from_tx_seg[0];
732 vlib_put_next_frame (vm, node, next_index,
734 vlib_get_new_next_frame (vm, node, next_index,
735 to_tx, n_left_to_tx);
737 while (n_tx_bufs > 0)
739 to_tx[0] = from_tx_seg[0];
747 n_bytes += n_tx_bytes;
748 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
751 vlib_increment_combined_counter
752 (im->combined_sw_if_counters +
753 VNET_INTERFACE_COUNTER_TX, thread_index, tx_swif0,
754 _vec_len (ptd->split_buffers), n_tx_bytes);
756 /* The buffers were enqueued. Reset the length */
757 _vec_len (ptd->split_buffers) = 0;
758 /* Free the now segmented buffer */
759 vlib_buffer_free_one (vm, bi0);
765 if (PREDICT_FALSE (tx_swif0 != rt->sw_if_index))
768 vlib_increment_combined_counter (im->combined_sw_if_counters +
769 VNET_INTERFACE_COUNTER_TX,
770 thread_index, tx_swif0, 1,
775 calc_checksums (vm, b[0]);
780 vlib_put_next_frame (vm, node, next_index, n_left_to_tx);
783 /* Update main interface stats. */
784 vlib_increment_combined_counter (im->combined_sw_if_counters
785 + VNET_INTERFACE_COUNTER_TX,
787 rt->sw_if_index, n_packets, n_bytes);
790 #endif /* CLIB_MARCH_VARIANT */
792 static_always_inline void vnet_interface_pcap_tx_trace
793 (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame,
794 int sw_if_index_from_buffer)
796 u32 n_left_from, *from;
799 if (PREDICT_TRUE (vlib_global_main.pcap[VLIB_TX].pcap_enable == 0))
802 if (sw_if_index_from_buffer == 0)
804 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
805 sw_if_index = rt->sw_if_index;
810 n_left_from = frame->n_vectors;
811 from = vlib_frame_vector_args (frame);
813 while (n_left_from > 0)
816 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
818 if (sw_if_index_from_buffer)
819 sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_TX];
821 if (vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == 0 ||
822 vlib_global_main.pcap[VLIB_TX].pcap_sw_if_index == sw_if_index)
823 pcap_add_buffer (&vlib_global_main.pcap[VLIB_TX].pcap_main, vm, bi0,
830 #ifndef CLIB_MARCH_VARIANT
831 static_always_inline uword
832 vnet_interface_output_node_inline (vlib_main_t * vm,
833 vlib_node_runtime_t * node,
834 vlib_frame_t * frame, vnet_main_t * vnm,
835 vnet_hw_interface_t * hi,
839 * The 3-headed "if" is here because we want to err on the side
840 * of not impacting the non-GSO performance - so for the more
841 * common case of no GSO interfaces we want to prevent the
842 * segmentation codepath from being there altogether.
844 if (PREDICT_TRUE (vnm->interface_main.gso_interface_count == 0))
845 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
847 /* do_segmentation */ 0);
848 else if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
849 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
851 /* do_segmentation */ 0);
853 return vnet_interface_output_node_inline_gso (vm, node, frame, vnm, hi,
855 /* do_segmentation */ 1);
859 vnet_interface_output_node (vlib_main_t * vm, vlib_node_runtime_t * node,
860 vlib_frame_t * frame)
862 vnet_main_t *vnm = vnet_get_main ();
863 vnet_hw_interface_t *hi;
864 vnet_interface_output_runtime_t *rt = (void *) node->runtime_data;
865 hi = vnet_get_sup_hw_interface (vnm, rt->sw_if_index);
867 vnet_interface_pcap_tx_trace (vm, node, frame,
868 0 /* sw_if_index_from_buffer */ );
870 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD)
871 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
872 /* do_tx_offloads */ 0);
874 return vnet_interface_output_node_inline (vm, node, frame, vnm, hi,
875 /* do_tx_offloads */ 1);
877 #endif /* CLIB_MARCH_VARIANT */
879 /* Use buffer's sw_if_index[VNET_TX] to choose output interface. */
880 VLIB_NODE_FN (vnet_per_buffer_interface_output_node) (vlib_main_t * vm,
881 vlib_node_runtime_t *
883 vlib_frame_t * frame)
885 vnet_main_t *vnm = vnet_get_main ();
886 u32 n_left_to_next, *from, *to_next;
887 u32 n_left_from, next_index;
889 vnet_interface_pcap_tx_trace (vm, node, frame,
890 1 /* sw_if_index_from_buffer */ );
892 n_left_from = frame->n_vectors;
894 from = vlib_frame_vector_args (frame);
895 next_index = node->cached_next_index;
897 while (n_left_from > 0)
899 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
901 while (n_left_from >= 4 && n_left_to_next >= 2)
903 u32 bi0, bi1, next0, next1;
904 vlib_buffer_t *b0, *b1;
905 vnet_hw_interface_t *hi0, *hi1;
907 /* Prefetch next iteration. */
908 vlib_prefetch_buffer_with_index (vm, from[2], LOAD);
909 vlib_prefetch_buffer_with_index (vm, from[3], LOAD);
920 b0 = vlib_get_buffer (vm, bi0);
921 b1 = vlib_get_buffer (vm, bi1);
924 vnet_get_sup_hw_interface (vnm,
925 vnet_buffer (b0)->sw_if_index
928 vnet_get_sup_hw_interface (vnm,
929 vnet_buffer (b1)->sw_if_index
932 next0 = hi0->output_node_next_index;
933 next1 = hi1->output_node_next_index;
935 vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next,
936 n_left_to_next, bi0, bi1, next0,
940 while (n_left_from > 0 && n_left_to_next > 0)
944 vnet_hw_interface_t *hi0;
953 b0 = vlib_get_buffer (vm, bi0);
956 vnet_get_sup_hw_interface (vnm,
957 vnet_buffer (b0)->sw_if_index
960 next0 = hi0->output_node_next_index;
962 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
963 n_left_to_next, bi0, next0);
966 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
969 return frame->n_vectors;
972 typedef struct vnet_error_trace_t_
975 } vnet_error_trace_t;
979 format_vnet_error_trace (u8 * s, va_list * va)
981 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *);
982 CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *);
983 vnet_error_trace_t *t = va_arg (*va, vnet_error_trace_t *);
985 s = format (s, "rx:%U", format_vnet_sw_if_index_name,
986 vnet_get_main (), t->sw_if_index);
992 interface_trace_buffers (vlib_main_t * vm,
993 vlib_node_runtime_t * node, vlib_frame_t * frame)
995 u32 n_left, *buffers;
997 buffers = vlib_frame_vector_args (frame);
998 n_left = frame->n_vectors;
1003 vlib_buffer_t *b0, *b1;
1004 vnet_error_trace_t *t0, *t1;
1006 /* Prefetch next iteration. */
1007 vlib_prefetch_buffer_with_index (vm, buffers[2], LOAD);
1008 vlib_prefetch_buffer_with_index (vm, buffers[3], LOAD);
1013 b0 = vlib_get_buffer (vm, bi0);
1014 b1 = vlib_get_buffer (vm, bi1);
1016 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1018 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1019 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1021 if (b1->flags & VLIB_BUFFER_IS_TRACED)
1023 t1 = vlib_add_trace (vm, node, b1, sizeof (t1[0]));
1024 t1->sw_if_index = vnet_buffer (b1)->sw_if_index[VLIB_RX];
1034 vnet_error_trace_t *t0;
1038 b0 = vlib_get_buffer (vm, bi0);
1040 if (b0->flags & VLIB_BUFFER_IS_TRACED)
1042 t0 = vlib_add_trace (vm, node, b0, sizeof (t0[0]));
1043 t0->sw_if_index = vnet_buffer (b0)->sw_if_index[VLIB_RX];
1052 VNET_ERROR_DISPOSITION_DROP,
1053 VNET_ERROR_DISPOSITION_PUNT,
1054 VNET_ERROR_N_DISPOSITION,
1055 } vnet_error_disposition_t;
1057 static_always_inline uword
1058 interface_drop_punt (vlib_main_t * vm,
1059 vlib_node_runtime_t * node,
1060 vlib_frame_t * frame,
1061 vnet_error_disposition_t disposition)
1063 u32 *from, n_left, thread_index, *sw_if_index;
1064 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1065 u32 sw_if_indices[VLIB_FRAME_SIZE];
1066 vlib_simple_counter_main_t *cm;
1067 u16 nexts[VLIB_FRAME_SIZE];
1070 vnm = vnet_get_main ();
1071 thread_index = vm->thread_index;
1072 from = vlib_frame_vector_args (frame);
1073 n_left = frame->n_vectors;
1075 sw_if_index = sw_if_indices;
1077 vlib_get_buffers (vm, from, bufs, n_left);
1079 if (node->flags & VLIB_NODE_FLAG_TRACE)
1080 interface_trace_buffers (vm, node, frame);
1082 /* All going to drop regardless, this is just a counting exercise */
1083 clib_memset (nexts, 0, sizeof (nexts));
1085 cm = vec_elt_at_index (vnm->interface_main.sw_if_counters,
1086 (disposition == VNET_ERROR_DISPOSITION_PUNT
1087 ? VNET_INTERFACE_COUNTER_PUNT
1088 : VNET_INTERFACE_COUNTER_DROP));
1090 /* collect the array of interfaces first ... */
1095 /* Prefetch 8 ahead - there's not much going on in each iteration */
1096 vlib_prefetch_buffer_header (b[4], LOAD);
1097 vlib_prefetch_buffer_header (b[5], LOAD);
1098 vlib_prefetch_buffer_header (b[6], LOAD);
1099 vlib_prefetch_buffer_header (b[7], LOAD);
1101 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1102 sw_if_index[1] = vnet_buffer (b[1])->sw_if_index[VLIB_RX];
1103 sw_if_index[2] = vnet_buffer (b[2])->sw_if_index[VLIB_RX];
1104 sw_if_index[3] = vnet_buffer (b[3])->sw_if_index[VLIB_RX];
1112 sw_if_index[0] = vnet_buffer (b[0])->sw_if_index[VLIB_RX];
1119 /* ... then count against them in blocks */
1120 n_left = frame->n_vectors;
1124 vnet_sw_interface_t *sw_if0;
1127 off = frame->n_vectors - n_left;
1129 sw_if_index = sw_if_indices + off;
1131 count = clib_count_equal_u32 (sw_if_index, n_left);
1134 vlib_increment_simple_counter (cm, thread_index, sw_if_index[0], count);
1136 /* Increment super-interface drop/punt counters for
1138 sw_if0 = vnet_get_sw_interface (vnm, sw_if_index[0]);
1139 if (sw_if0->sup_sw_if_index != sw_if_index[0])
1140 vlib_increment_simple_counter
1141 (cm, thread_index, sw_if0->sup_sw_if_index, count);
1144 vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors);
1146 return frame->n_vectors;
1150 pcap_drop_trace (vlib_main_t * vm,
1151 vnet_interface_main_t * im, vlib_frame_t * f)
1154 u32 n_left = f->n_vectors;
1155 vlib_buffer_t *b0, *p1;
1157 i16 save_current_data;
1158 u16 save_current_length;
1160 from = vlib_frame_vector_args (f);
1164 if (PREDICT_TRUE (n_left > 1))
1166 p1 = vlib_get_buffer (vm, from[1]);
1167 vlib_prefetch_buffer_header (p1, LOAD);
1171 b0 = vlib_get_buffer (vm, bi0);
1175 /* See if we're pointedly ignoring this specific error */
1176 if (im->pcap_drop_filter_hash
1177 && hash_get (im->pcap_drop_filter_hash, b0->error))
1180 /* Trace all drops, or drops received on a specific interface */
1181 if (im->pcap_sw_if_index == 0 ||
1182 im->pcap_sw_if_index == vnet_buffer (b0)->sw_if_index[VLIB_RX])
1184 save_current_data = b0->current_data;
1185 save_current_length = b0->current_length;
1188 * Typically, we'll need to rewind the buffer
1190 if (b0->current_data > 0)
1191 vlib_buffer_advance (b0, (word) - b0->current_data);
1193 pcap_add_buffer (&im->pcap_main, vm, bi0, 512);
1195 b0->current_data = save_current_data;
1196 b0->current_length = save_current_length;
1201 #ifndef CLIB_MARCH_VARIANT
1203 vnet_pcap_drop_trace_filter_add_del (u32 error_index, int is_add)
1205 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1207 if (im->pcap_drop_filter_hash == 0)
1208 im->pcap_drop_filter_hash = hash_create (0, sizeof (uword));
1211 hash_set (im->pcap_drop_filter_hash, error_index, 1);
1213 hash_unset (im->pcap_drop_filter_hash, error_index);
1215 #endif /* CLIB_MARCH_VARIANT */
1217 VLIB_NODE_FN (interface_drop) (vlib_main_t * vm,
1218 vlib_node_runtime_t * node,
1219 vlib_frame_t * frame)
1221 vnet_interface_main_t *im = &vnet_get_main ()->interface_main;
1223 if (PREDICT_FALSE (im->drop_pcap_enable))
1224 pcap_drop_trace (vm, im, frame);
1226 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_DROP);
1229 VLIB_NODE_FN (interface_punt) (vlib_main_t * vm,
1230 vlib_node_runtime_t * node,
1231 vlib_frame_t * frame)
1233 return interface_drop_punt (vm, node, frame, VNET_ERROR_DISPOSITION_PUNT);
1237 VLIB_REGISTER_NODE (interface_drop) = {
1238 .name = "error-drop",
1239 .vector_size = sizeof (u32),
1240 .format_trace = format_vnet_error_trace,
1249 VLIB_REGISTER_NODE (interface_punt) = {
1250 .name = "error-punt",
1251 .vector_size = sizeof (u32),
1252 .format_trace = format_vnet_error_trace,
1261 VLIB_REGISTER_NODE (vnet_per_buffer_interface_output_node) = {
1262 .name = "interface-output",
1263 .vector_size = sizeof (u32),
1268 interface_tx_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1269 vlib_frame_t * from_frame)
1271 vnet_main_t *vnm = vnet_get_main ();
1272 u32 last_sw_if_index = ~0;
1273 vlib_frame_t *to_frame = 0;
1274 vnet_hw_interface_t *hw = 0;
1275 u32 *from, *to_next = 0;
1278 from = vlib_frame_vector_args (from_frame);
1279 n_left_from = from_frame->n_vectors;
1280 while (n_left_from > 0)
1289 b0 = vlib_get_buffer (vm, bi0);
1290 sw_if_index0 = vnet_buffer (b0)->sw_if_index[VLIB_TX];
1292 if (PREDICT_FALSE ((last_sw_if_index != sw_if_index0) || to_frame == 0))
1296 hw = vnet_get_sup_hw_interface (vnm, last_sw_if_index);
1297 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1299 last_sw_if_index = sw_if_index0;
1300 hw = vnet_get_sup_hw_interface (vnm, sw_if_index0);
1301 to_frame = vlib_get_frame_to_node (vm, hw->tx_node_index);
1302 to_next = vlib_frame_vector_args (to_frame);
1307 to_frame->n_vectors++;
1309 vlib_put_frame_to_node (vm, hw->tx_node_index, to_frame);
1310 return from_frame->n_vectors;
1314 VLIB_REGISTER_NODE (interface_tx, static) = {
1315 .function = interface_tx_node_fn,
1316 .name = "interface-tx",
1317 .vector_size = sizeof (u32),
1324 VNET_FEATURE_ARC_INIT (interface_output, static) =
1326 .arc_name = "interface-output",
1327 .start_nodes = VNET_FEATURES (0),
1328 .last_in_arc = "interface-tx",
1329 .arc_index_ptr = &vnet_main.interface_main.output_feature_arc_index,
1332 VNET_FEATURE_INIT (span_tx, static) = {
1333 .arc_name = "interface-output",
1334 .node_name = "span-output",
1335 .runs_before = VNET_FEATURES ("interface-tx"),
1338 VNET_FEATURE_INIT (ipsec_if_tx, static) = {
1339 .arc_name = "interface-output",
1340 .node_name = "ipsec-if-output",
1341 .runs_before = VNET_FEATURES ("interface-tx"),
1344 VNET_FEATURE_INIT (interface_tx, static) = {
1345 .arc_name = "interface-output",
1346 .node_name = "interface-tx",
1351 #ifndef CLIB_MARCH_VARIANT
1353 vnet_per_buffer_interface_output_hw_interface_add_del (vnet_main_t * vnm,
1357 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1360 if (hi->output_node_index == 0)
1363 next_index = vlib_node_add_next
1364 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index,
1365 hi->output_node_index);
1366 hi->output_node_next_index = next_index;
1371 VNET_HW_INTERFACE_ADD_DEL_FUNCTION
1372 (vnet_per_buffer_interface_output_hw_interface_add_del);
1375 vnet_set_interface_output_node (vnet_main_t * vnm,
1376 u32 hw_if_index, u32 node_index)
1378 ASSERT (node_index);
1379 vnet_hw_interface_t *hi = vnet_get_hw_interface (vnm, hw_if_index);
1380 u32 next_index = vlib_node_add_next
1381 (vnm->vlib_main, vnet_per_buffer_interface_output_node.index, node_index);
1382 hi->output_node_next_index = next_index;
1383 hi->output_node_index = node_index;
1385 #endif /* CLIB_MARCH_VARIANT */
1387 static clib_error_t *
1388 pcap_drop_trace_command_fn (vlib_main_t * vm,
1389 unformat_input_t * input,
1390 vlib_cli_command_t * cmd)
1392 vnet_main_t *vnm = vnet_get_main ();
1393 vnet_interface_main_t *im = &vnm->interface_main;
1397 clib_error_t *error = 0;
1399 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1401 if (unformat (input, "on"))
1403 if (im->drop_pcap_enable == 0)
1405 if (im->pcap_filename == 0)
1406 im->pcap_filename = format (0, "/tmp/drop.pcap%c", 0);
1408 clib_memset (&im->pcap_main, 0, sizeof (im->pcap_main));
1409 im->pcap_main.file_name = (char *) im->pcap_filename;
1410 im->pcap_main.n_packets_to_capture = PCAP_DEF_PKT_TO_CAPTURE;
1411 if (im->pcap_pkts_to_capture)
1412 im->pcap_main.n_packets_to_capture = im->pcap_pkts_to_capture;
1414 im->pcap_main.packet_type = PCAP_PACKET_TYPE_ethernet;
1415 im->drop_pcap_enable = 1;
1417 vlib_cli_output (vm, "pcap drop capture on...");
1421 vlib_cli_output (vm, "pcap drop capture already on...");
1425 else if (unformat (input, "off"))
1429 if (im->drop_pcap_enable)
1431 vlib_cli_output (vm, "captured %d pkts...",
1432 im->pcap_main.n_packets_captured);
1433 if (im->pcap_main.n_packets_captured)
1435 im->pcap_main.n_packets_to_capture =
1436 im->pcap_main.n_packets_captured;
1437 error = pcap_write (&im->pcap_main);
1439 clib_error_report (error);
1441 vlib_cli_output (vm, "saved to %s...", im->pcap_filename);
1446 vlib_cli_output (vm, "pcap drop capture already off...");
1449 im->drop_pcap_enable = 0;
1451 else if (unformat (input, "max %d", &max))
1453 im->pcap_pkts_to_capture = max;
1457 else if (unformat (input, "intfc %U",
1458 unformat_vnet_sw_interface, vnm,
1459 &im->pcap_sw_if_index))
1461 else if (unformat (input, "intfc any"))
1463 im->pcap_sw_if_index = 0;
1466 else if (unformat (input, "file %s", &filename))
1468 u8 *chroot_filename;
1469 /* Brain-police user path input */
1470 if (strstr ((char *) filename, "..")
1471 || index ((char *) filename, '/'))
1473 vlib_cli_output (vm, "illegal characters in filename '%s'",
1478 chroot_filename = format (0, "/tmp/%s%c", filename, 0);
1479 vec_free (filename);
1481 if (im->pcap_filename)
1482 vec_free (im->pcap_filename);
1483 im->pcap_filename = chroot_filename;
1484 im->pcap_main.file_name = (char *) im->pcap_filename;
1487 else if (unformat (input, "status"))
1489 if (im->drop_pcap_enable == 0)
1491 vlib_cli_output (vm, "pcap drop capture is off...");
1495 vlib_cli_output (vm, "pcap drop capture: %d of %d pkts...",
1496 im->pcap_main.n_packets_captured,
1497 im->pcap_main.n_packets_to_capture);
1506 return clib_error_return (0, "unknown input `%U'",
1507 format_unformat_error, input);
1513 VLIB_CLI_COMMAND (pcap_trace_command, static) = {
1514 .path = "pcap drop trace",
1516 "pcap drop trace on off max <nn> intfc <intfc> file <name> status",
1517 .function = pcap_drop_trace_command_fn,
1522 * fd.io coding-style-patch-verification: ON
1525 * eval: (c-set-style "gnu")