2 * Copyright (c) 2018 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 #include <vlib/vlib.h>
17 #include <vnet/vnet.h>
18 #include <vppinfra/error.h>
19 #include <vnet/ethernet/ethernet.h>
20 #include <vnet/feature/feature.h>
21 #include <vnet/gso/gso.h>
22 #include <vnet/gso/hdr_offset_parser.h>
23 #include <vnet/ip/icmp46_packet.h>
24 #include <vnet/ip/ip4.h>
25 #include <vnet/ip/ip6.h>
26 #include <vnet/udp/udp_packet.h>
33 generic_header_offset_t gho;
37 format_gso_trace (u8 * s, va_list * args)
39 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
40 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
41 gso_trace_t *t = va_arg (*args, gso_trace_t *);
43 if (t->flags & VNET_BUFFER_F_GSO)
45 s = format (s, "gso_sz %d gso_l4_hdr_sz %d\n%U",
46 t->gso_size, t->gso_l4_hdr_sz, format_generic_header_offset,
52 format (s, "non-gso buffer\n%U", format_generic_header_offset,
59 static_always_inline u16
60 tso_segment_ipip_tunnel_fixup (vlib_main_t * vm,
61 vnet_interface_per_thread_data_t * ptd,
63 generic_header_offset_t * gho)
65 u16 n_tx_bufs = vec_len (ptd->split_buffers);
66 u16 i = 0, n_tx_bytes = 0;
70 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
71 vnet_get_outer_header (b0, gho);
72 clib_memcpy_fast (vlib_buffer_get_current (b0),
73 vlib_buffer_get_current (sb0), gho->outer_hdr_sz);
76 (ip4_header_t *) (vlib_buffer_get_current (b0) +
77 gho->outer_l3_hdr_offset);
79 (ip6_header_t *) (vlib_buffer_get_current (b0) +
80 gho->outer_l3_hdr_offset);
82 if (gho->gho_flags & GHO_F_OUTER_IP4)
85 clib_host_to_net_u16 (b0->current_length -
86 gho->outer_l3_hdr_offset);
87 ip4->checksum = ip4_header_checksum (ip4);
89 else if (gho->gho_flags & GHO_F_OUTER_IP6)
92 clib_host_to_net_u16 (b0->current_length -
93 gho->outer_l4_hdr_offset);
96 n_tx_bytes += gho->outer_hdr_sz;
102 static_always_inline void
103 tso_segment_vxlan_tunnel_headers_fixup (vlib_main_t * vm, vlib_buffer_t * b,
104 generic_header_offset_t * gho)
107 ip4_header_t *ip4 = 0;
108 ip6_header_t *ip6 = 0;
109 udp_header_t *udp = 0;
112 (ip4_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
114 (ip6_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
116 (udp_header_t *) (vlib_buffer_get_current (b) + gho->outer_l4_hdr_offset);
118 if (gho->gho_flags & GHO_F_OUTER_IP4)
120 proto = ip4->protocol;
122 clib_host_to_net_u16 (b->current_length - gho->outer_l3_hdr_offset);
123 ip4->checksum = ip4_header_checksum (ip4);
125 else if (gho->gho_flags & GHO_F_OUTER_IP6)
127 proto = ip6->protocol;
128 ip6->payload_length =
129 clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
131 if (proto == IP_PROTOCOL_UDP)
135 clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
137 if (gho->gho_flags & GHO_F_OUTER_IP6)
140 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
142 else if (gho->gho_flags & GHO_F_OUTER_IP4)
144 udp->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
146 b->flags &= ~VNET_BUFFER_F_OFFLOAD_UDP_CKSUM;
150 static_always_inline u16
151 tso_segment_vxlan_tunnel_fixup (vlib_main_t * vm,
152 vnet_interface_per_thread_data_t * ptd,
154 generic_header_offset_t * gho)
156 u16 n_tx_bufs = vec_len (ptd->split_buffers);
157 u16 i = 0, n_tx_bytes = 0;
159 while (i < n_tx_bufs)
161 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
162 vnet_get_outer_header (b0, gho);
163 clib_memcpy_fast (vlib_buffer_get_current (b0),
164 vlib_buffer_get_current (sb0), gho->outer_hdr_sz);
166 tso_segment_vxlan_tunnel_headers_fixup (vm, b0, gho);
167 n_tx_bytes += gho->outer_hdr_sz;
173 static_always_inline u16
174 tso_alloc_tx_bufs (vlib_main_t * vm,
175 vnet_interface_per_thread_data_t * ptd,
176 vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
177 u16 gso_size, u16 first_data_size,
178 generic_header_offset_t * gho)
181 u16 first_packet_length = l234_sz + first_data_size;
184 * size is the amount of data per segmented buffer except the 1st
186 * l2_hdr_offset is an offset == current_data of vlib_buffer_t.
187 * l234_sz is hdr_sz from l2_hdr_offset.
190 clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz
191 - gho->l2_hdr_offset);
194 * First segmented buffer length is calculated separately.
195 * As it may contain less data than gso_size (when gso_size is
196 * greater than current_length of 1st buffer from GSO chained
197 * buffers) and/or size calculated above.
202 * Total packet length minus first packet length including l234 header.
203 * rounded-up division
205 ASSERT (n_bytes_b0 > first_packet_length);
206 n_bufs += ((n_bytes_b0 - first_packet_length + (size - 1)) / size);
208 vec_validate (ptd->split_buffers, n_bufs - 1);
210 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
211 if (n_alloc < n_bufs)
213 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
219 static_always_inline void
220 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
221 u32 flags, u16 length)
223 /* copying objects from cacheline 0 */
224 nb0->current_data = b0->current_data;
225 nb0->current_length = length;
226 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
227 nb0->flow_id = b0->flow_id;
228 nb0->error = b0->error;
229 nb0->current_config_index = b0->current_config_index;
230 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
232 /* copying objects from cacheline 1 */
233 nb0->trace_handle = b0->trace_handle;
234 nb0->total_length_not_including_first_buffer = 0;
237 clib_memcpy_fast (vlib_buffer_get_current (nb0),
238 vlib_buffer_get_current (b0), length);
241 static_always_inline void
242 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
243 vlib_buffer_t * b0, u16 template_data_sz,
244 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
245 u32 next_tcp_seq, u32 flags,
246 generic_header_offset_t * gho)
248 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
252 vlib_buffer_get_default_data_size (vm) - (template_data_sz +
254 *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
257 (tcp_header_t *) (vlib_buffer_get_current (nb0) + gho->l4_hdr_offset);
258 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
261 static_always_inline void
262 tso_fixup_segmented_buf (vlib_main_t * vm, vlib_buffer_t * b0, u8 tcp_flags,
263 int is_l2, int is_ip6, generic_header_offset_t * gho)
266 (ip4_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
268 (ip6_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
270 (tcp_header_t *) (vlib_buffer_get_current (b0) + gho->l4_hdr_offset);
272 tcp->flags = tcp_flags;
276 ip6->payload_length =
277 clib_host_to_net_u16 (b0->current_length - gho->l4_hdr_offset);
278 if (gho->gho_flags & GHO_F_TCP)
283 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus);
284 b0->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
290 clib_host_to_net_u16 (b0->current_length - gho->l3_hdr_offset);
291 if (gho->gho_flags & GHO_F_IP4)
292 ip4->checksum = ip4_header_checksum (ip4);
293 if (gho->gho_flags & GHO_F_TCP)
296 tcp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip4);
298 b0->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
299 b0->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
302 if (!is_l2 && ((gho->gho_flags & GHO_F_TUNNEL) == 0))
304 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
306 ip_adjacency_t *adj0 = adj_get (adj_index0);
308 if (adj0->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN &&
309 adj0->sub_type.midchain.fixup_func)
310 /* calls e.g. ipip44_fixup */
311 adj0->sub_type.midchain.fixup_func
312 (vm, adj0, b0, adj0->sub_type.midchain.fixup_data);
317 * Allocate the necessary number of ptd->split_buffers,
318 * and segment the possibly chained buffer(s) from b0 into
321 * Return the cumulative number of bytes sent or zero
322 * if allocation failed.
325 static_always_inline u32
326 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
327 u32 sbi0, vlib_buffer_t * sb0,
328 generic_header_offset_t * gho, u32 n_bytes_b0, int is_l2,
332 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
334 u8 save_tcp_flags = 0;
335 u8 tcp_flags_no_fin_psh = 0;
336 u32 next_tcp_seq = 0;
339 (tcp_header_t *) (vlib_buffer_get_current (sb0) + gho->l4_hdr_offset);
340 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
341 /* store original flags for last packet and reset FIN and PSH */
342 save_tcp_flags = tcp->flags;
343 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
347 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
348 u16 l234_sz = gho->hdr_sz;
349 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
350 next_tcp_seq += first_data_size;
354 (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size, first_data_size, gho)))
357 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
358 tso_init_buf_from_template_base (b0, sb0, default_bflags,
359 l234_sz + first_data_size);
361 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
364 /* Need to copy more segments */
365 u8 *src_ptr, *dst_ptr;
366 u16 src_left, dst_left;
367 /* current source buffer */
368 vlib_buffer_t *csb0 = sb0;
370 /* current dest buffer */
372 u16 dbi = 1; /* the buffer [0] is b0 */
374 src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
375 src_left = sb0->current_length - l234_sz - first_data_size;
377 tso_fixup_segmented_buf (vm, b0, tcp_flags_no_fin_psh, is_l2, is_ip6,
380 /* grab a second buffer and prepare the loop */
381 ASSERT (dbi < vec_len (ptd->split_buffers));
382 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
383 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
384 &dst_left, next_tcp_seq, default_bflags,
387 /* an arbitrary large number to catch the runaway loops */
389 while (total_src_left)
392 clib_panic ("infinite loop detected");
393 u16 bytes_to_copy = clib_min (src_left, dst_left);
395 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
397 src_left -= bytes_to_copy;
398 src_ptr += bytes_to_copy;
399 total_src_left -= bytes_to_copy;
400 dst_left -= bytes_to_copy;
401 dst_ptr += bytes_to_copy;
402 next_tcp_seq += bytes_to_copy;
403 cdb0->current_length += bytes_to_copy;
407 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
408 u32 next_bi = csb0->next_buffer;
410 /* init src to the next buffer in chain */
414 csb0 = vlib_get_buffer (vm, csbi0);
415 src_left = csb0->current_length;
416 src_ptr = vlib_buffer_get_current (csb0);
420 ASSERT (total_src_left == 0);
424 if (0 == dst_left && total_src_left)
426 n_tx_bytes += cdb0->current_length;
427 tso_fixup_segmented_buf (vm, cdb0, tcp_flags_no_fin_psh, is_l2,
429 ASSERT (dbi < vec_len (ptd->split_buffers));
430 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
431 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
432 gso_size, &dst_ptr, &dst_left,
433 next_tcp_seq, default_bflags, gho);
437 tso_fixup_segmented_buf (vm, cdb0, save_tcp_flags, is_l2, is_ip6, gho);
439 n_tx_bytes += cdb0->current_length;
441 n_tx_bytes += b0->current_length;
445 static_always_inline void
446 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
447 vlib_node_runtime_t * node, u32 * pbi0,
448 u32 sw_if_index, u32 drop_error_code)
450 u32 thread_index = vm->thread_index;
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, 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_gso_node_inline (vlib_main_t * vm,
467 vlib_node_runtime_t * node,
468 vlib_frame_t * frame,
470 vnet_hw_interface_t * hi,
471 int is_l2, int is_ip4, int is_ip6, int do_segmentation)
474 u32 next_index = node->cached_next_index;
475 u32 *from = vlib_frame_vector_args (frame);
476 u32 n_left_from = frame->n_vectors;
477 u32 *from_end = from + n_left_from;
478 u32 thread_index = vm->thread_index;
479 vnet_interface_main_t *im = &vnm->interface_main;
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 vlib_get_buffers (vm, from, b, n_left_from);
486 while (n_left_from > 0)
490 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
492 if (!do_segmentation)
493 while (from + 8 <= from_end && n_left_to_next >= 4)
495 u32 bi0, bi1, bi2, bi3;
496 u32 next0, next1, next2, next3;
497 u32 swif0, swif1, swif2, swif3;
498 gso_trace_t *t0, *t1, *t2, *t3;
499 vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
501 /* Prefetch next iteration. */
502 vlib_prefetch_buffer_header (b[4], LOAD);
503 vlib_prefetch_buffer_header (b[5], LOAD);
504 vlib_prefetch_buffer_header (b[6], LOAD);
505 vlib_prefetch_buffer_header (b[7], LOAD);
516 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
517 swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
518 swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
519 swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
521 if (PREDICT_FALSE (hi->sw_if_index != swif0))
523 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
524 if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
525 (b[0]->flags & VNET_BUFFER_F_GSO))
528 if (PREDICT_FALSE (hi->sw_if_index != swif1))
530 hi1 = vnet_get_sup_hw_interface (vnm, swif1);
531 if (!(hi1->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
532 (b[1]->flags & VNET_BUFFER_F_GSO))
535 if (PREDICT_FALSE (hi->sw_if_index != swif2))
537 hi2 = vnet_get_sup_hw_interface (vnm, swif2);
538 if ((hi2->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
539 (b[2]->flags & VNET_BUFFER_F_GSO))
542 if (PREDICT_FALSE (hi->sw_if_index != swif3))
544 hi3 = vnet_get_sup_hw_interface (vnm, swif3);
545 if (!(hi3->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
546 (b[3]->flags & VNET_BUFFER_F_GSO))
550 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
552 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
553 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
554 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
555 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
556 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
559 if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
561 t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
562 t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
563 t1->gso_size = vnet_buffer2 (b[1])->gso_size;
564 t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
565 vnet_generic_header_offset_parser (b[1], &t1->gho, is_l2,
568 if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
570 t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
571 t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
572 t2->gso_size = vnet_buffer2 (b[2])->gso_size;
573 t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
574 vnet_generic_header_offset_parser (b[2], &t2->gho, is_l2,
577 if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
579 t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
580 t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
581 t3->gso_size = vnet_buffer2 (b[3])->gso_size;
582 t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
583 vnet_generic_header_offset_parser (b[3], &t3->gho, is_l2,
594 vnet_feature_next (&next0, b[0]);
595 vnet_feature_next (&next1, b[1]);
596 vnet_feature_next (&next2, b[2]);
597 vnet_feature_next (&next3, b[3]);
598 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
599 n_left_to_next, bi0, bi1, bi2,
600 bi3, next0, next1, next2, next3);
604 while (from + 1 <= from_end && n_left_to_next > 0)
608 vnet_hw_interface_t *hi0;
610 u32 do_segmentation0 = 0;
612 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
613 if (PREDICT_FALSE (hi->sw_if_index != swif0))
615 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
616 if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
617 (b[0]->flags & VNET_BUFFER_F_GSO))
618 do_segmentation0 = 1;
621 do_segmentation0 = do_segmentation;
623 /* speculatively enqueue b0 to the current next frame */
624 to_next[0] = bi0 = from[0];
630 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
632 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
633 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
634 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
635 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
636 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
640 if (do_segmentation0)
642 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
645 * Undo the enqueue of the b0 - it is not going anywhere,
646 * and will be freed either after it's segmented or
647 * when dropped, if there is no buffers to segment into.
651 /* undo the counting. */
652 generic_header_offset_t gho = { 0 };
653 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
655 u32 inner_is_ip6 = is_ip6;
657 vnet_generic_header_offset_parser (b[0], &gho, is_l2,
660 if (PREDICT_FALSE (gho.gho_flags & GHO_F_TUNNEL))
663 (gho.gho_flags & (GHO_F_GRE_TUNNEL |
664 GHO_F_GENEVE_TUNNEL)))
666 /* not supported yet */
667 drop_one_buffer_and_count (vm, vnm, node, from - 1,
669 VNET_INTERFACE_OUTPUT_ERROR_UNHANDLED_GSO_TYPE);
674 vnet_get_inner_header (b[0], &gho);
676 n_bytes_b0 -= gho.outer_hdr_sz;
677 inner_is_ip6 = (gho.gho_flags & GHO_F_IP6) != 0;
681 tso_segment_buffer (vm, ptd, bi0, b[0], &gho, n_bytes_b0,
682 is_l2, inner_is_ip6);
684 if (PREDICT_FALSE (n_tx_bytes == 0))
686 drop_one_buffer_and_count (vm, vnm, node, from - 1,
688 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
694 if (PREDICT_FALSE (gho.gho_flags & GHO_F_VXLAN_TUNNEL))
696 vnet_get_outer_header (b[0], &gho);
698 tso_segment_vxlan_tunnel_fixup (vm, ptd, b[0], &gho);
702 (gho.gho_flags & (GHO_F_IPIP_TUNNEL |
703 GHO_F_IPIP6_TUNNEL)))
705 vnet_get_outer_header (b[0], &gho);
707 tso_segment_ipip_tunnel_fixup (vm, ptd, b[0], &gho);
710 u16 n_tx_bufs = vec_len (ptd->split_buffers);
711 u32 *from_seg = ptd->split_buffers;
713 while (n_tx_bufs > 0)
717 while (n_tx_bufs > 0 && n_left_to_next > 0)
719 sbi0 = to_next[0] = from_seg[0];
720 sb0 = vlib_get_buffer (vm, sbi0);
721 ASSERT (sb0->current_length > 0);
727 vnet_feature_next (&next0, sb0);
728 vlib_validate_buffer_enqueue_x1 (vm, node,
734 vlib_put_next_frame (vm, node, next_index,
737 vlib_get_next_frame (vm, node, next_index,
738 to_next, n_left_to_next);
740 /* The buffers were enqueued. Reset the length */
741 _vec_len (ptd->split_buffers) = 0;
742 /* Free the now segmented buffer */
743 vlib_buffer_free_one (vm, bi0);
749 vnet_feature_next (&next0, b[0]);
750 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
751 n_left_to_next, bi0, next0);
754 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
757 return frame->n_vectors;
760 static_always_inline uword
761 vnet_gso_inline (vlib_main_t * vm,
762 vlib_node_runtime_t * node, vlib_frame_t * frame, int is_l2,
763 int is_ip4, int is_ip6)
765 vnet_main_t *vnm = vnet_get_main ();
766 vnet_hw_interface_t *hi;
768 if (frame->n_vectors > 0)
770 u32 *from = vlib_frame_vector_args (frame);
771 vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
772 hi = vnet_get_sup_hw_interface (vnm,
773 vnet_buffer (b)->sw_if_index[VLIB_TX]);
775 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
776 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
777 is_l2, is_ip4, is_ip6,
778 /* do_segmentation */ 0);
780 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
781 is_l2, is_ip4, is_ip6,
782 /* do_segmentation */ 1);
787 VLIB_NODE_FN (gso_l2_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
788 vlib_frame_t * frame)
790 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 1 /* ip4 */ ,
794 VLIB_NODE_FN (gso_l2_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
795 vlib_frame_t * frame)
797 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 0 /* ip4 */ ,
801 VLIB_NODE_FN (gso_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
802 vlib_frame_t * frame)
804 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 1 /* ip4 */ ,
808 VLIB_NODE_FN (gso_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
809 vlib_frame_t * frame)
811 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 0 /* ip4 */ ,
817 VLIB_REGISTER_NODE (gso_l2_ip4_node) = {
818 .vector_size = sizeof (u32),
819 .format_trace = format_gso_trace,
820 .type = VLIB_NODE_TYPE_INTERNAL,
823 .name = "gso-l2-ip4",
826 VLIB_REGISTER_NODE (gso_l2_ip6_node) = {
827 .vector_size = sizeof (u32),
828 .format_trace = format_gso_trace,
829 .type = VLIB_NODE_TYPE_INTERNAL,
832 .name = "gso-l2-ip6",
835 VLIB_REGISTER_NODE (gso_ip4_node) = {
836 .vector_size = sizeof (u32),
837 .format_trace = format_gso_trace,
838 .type = VLIB_NODE_TYPE_INTERNAL,
844 VLIB_REGISTER_NODE (gso_ip6_node) = {
845 .vector_size = sizeof (u32),
846 .format_trace = format_gso_trace,
847 .type = VLIB_NODE_TYPE_INTERNAL,
853 VNET_FEATURE_INIT (gso_l2_ip4_node, static) = {
854 .arc_name = "l2-output-ip4",
855 .node_name = "gso-l2-ip4",
856 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
859 VNET_FEATURE_INIT (gso_l2_ip6_node, static) = {
860 .arc_name = "l2-output-ip6",
861 .node_name = "gso-l2-ip6",
862 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
865 VNET_FEATURE_INIT (gso_ip4_node, static) = {
866 .arc_name = "ip4-output",
867 .node_name = "gso-ip4",
868 .runs_before = VNET_FEATURES ("ipsec4-output-feature"),
871 VNET_FEATURE_INIT (gso_ip6_node, static) = {
872 .arc_name = "ip6-output",
873 .node_name = "gso-ip6",
874 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
878 * fd.io coding-style-patch-verification: ON
881 * eval: (c-set-style "gnu")