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 /* FIXME: it should be OUTER_UDP_CKSUM */
147 vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
151 static_always_inline u16
152 tso_segment_vxlan_tunnel_fixup (vlib_main_t * vm,
153 vnet_interface_per_thread_data_t * ptd,
155 generic_header_offset_t * gho)
157 u16 n_tx_bufs = vec_len (ptd->split_buffers);
158 u16 i = 0, n_tx_bytes = 0;
160 while (i < n_tx_bufs)
162 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
163 vnet_get_outer_header (b0, gho);
164 clib_memcpy_fast (vlib_buffer_get_current (b0),
165 vlib_buffer_get_current (sb0), gho->outer_hdr_sz);
167 tso_segment_vxlan_tunnel_headers_fixup (vm, b0, gho);
168 n_tx_bytes += gho->outer_hdr_sz;
174 static_always_inline u16
175 tso_alloc_tx_bufs (vlib_main_t * vm,
176 vnet_interface_per_thread_data_t * ptd,
177 vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
178 u16 gso_size, u16 first_data_size,
179 generic_header_offset_t * gho)
182 u16 first_packet_length = l234_sz + first_data_size;
185 * size is the amount of data per segmented buffer except the 1st
187 * l2_hdr_offset is an offset == current_data of vlib_buffer_t.
188 * l234_sz is hdr_sz from l2_hdr_offset.
191 clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz
192 - gho->l2_hdr_offset);
195 * First segmented buffer length is calculated separately.
196 * As it may contain less data than gso_size (when gso_size is
197 * greater than current_length of 1st buffer from GSO chained
198 * buffers) and/or size calculated above.
203 * Total packet length minus first packet length including l234 header.
204 * rounded-up division
206 ASSERT (n_bytes_b0 > first_packet_length);
207 n_bufs += ((n_bytes_b0 - first_packet_length + (size - 1)) / size);
209 vec_validate (ptd->split_buffers, n_bufs - 1);
211 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
212 if (n_alloc < n_bufs)
214 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
220 static_always_inline void
221 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
222 u32 flags, u16 length)
224 /* copying objects from cacheline 0 */
225 nb0->current_data = b0->current_data;
226 nb0->current_length = length;
227 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
228 nb0->flow_id = b0->flow_id;
229 nb0->error = b0->error;
230 nb0->current_config_index = b0->current_config_index;
231 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
233 /* copying objects from cacheline 1 */
234 nb0->trace_handle = b0->trace_handle;
235 nb0->total_length_not_including_first_buffer = 0;
238 clib_memcpy_fast (vlib_buffer_get_current (nb0),
239 vlib_buffer_get_current (b0), length);
242 static_always_inline void
243 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
244 vlib_buffer_t * b0, u16 template_data_sz,
245 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
246 u32 next_tcp_seq, u32 flags,
247 generic_header_offset_t * gho)
249 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
253 vlib_buffer_get_default_data_size (vm) - (template_data_sz +
255 *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
258 (tcp_header_t *) (vlib_buffer_get_current (nb0) + gho->l4_hdr_offset);
259 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
262 static_always_inline void
263 tso_fixup_segmented_buf (vlib_main_t * vm, vlib_buffer_t * b0, u8 tcp_flags,
264 int is_l2, int is_ip6, generic_header_offset_t * gho)
267 (ip4_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
269 (ip6_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
271 (tcp_header_t *) (vlib_buffer_get_current (b0) + gho->l4_hdr_offset);
273 tcp->flags = tcp_flags;
277 ip6->payload_length =
278 clib_host_to_net_u16 (b0->current_length - gho->l4_hdr_offset);
279 if (gho->gho_flags & GHO_F_TCP)
284 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus);
285 vnet_buffer_offload_flags_clear (b0,
286 VNET_BUFFER_OFFLOAD_F_TCP_CKSUM);
292 clib_host_to_net_u16 (b0->current_length - gho->l3_hdr_offset);
293 if (gho->gho_flags & GHO_F_IP4)
294 ip4->checksum = ip4_header_checksum (ip4);
295 if (gho->gho_flags & GHO_F_TCP)
298 tcp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip4);
300 vnet_buffer_offload_flags_clear (b0, (VNET_BUFFER_OFFLOAD_F_IP_CKSUM |
301 VNET_BUFFER_OFFLOAD_F_TCP_CKSUM));
304 if (!is_l2 && ((gho->gho_flags & GHO_F_TUNNEL) == 0))
306 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
308 ip_adjacency_t *adj0 = adj_get (adj_index0);
310 if (adj0->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN &&
311 adj0->sub_type.midchain.fixup_func)
312 /* calls e.g. ipip44_fixup */
313 adj0->sub_type.midchain.fixup_func
314 (vm, adj0, b0, adj0->sub_type.midchain.fixup_data);
319 * Allocate the necessary number of ptd->split_buffers,
320 * and segment the possibly chained buffer(s) from b0 into
323 * Return the cumulative number of bytes sent or zero
324 * if allocation failed.
327 static_always_inline u32
328 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
329 u32 sbi0, vlib_buffer_t * sb0,
330 generic_header_offset_t * gho, u32 n_bytes_b0, int is_l2,
334 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
336 u8 save_tcp_flags = 0;
337 u8 tcp_flags_no_fin_psh = 0;
338 u32 next_tcp_seq = 0;
341 (tcp_header_t *) (vlib_buffer_get_current (sb0) + gho->l4_hdr_offset);
342 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
343 /* store original flags for last packet and reset FIN and PSH */
344 save_tcp_flags = tcp->flags;
345 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
349 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
350 u16 l234_sz = gho->hdr_sz;
351 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
352 next_tcp_seq += first_data_size;
356 (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size, first_data_size, gho)))
359 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
360 tso_init_buf_from_template_base (b0, sb0, default_bflags,
361 l234_sz + first_data_size);
363 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
366 /* Need to copy more segments */
367 u8 *src_ptr, *dst_ptr;
368 u16 src_left, dst_left;
369 /* current source buffer */
370 vlib_buffer_t *csb0 = sb0;
372 /* current dest buffer */
374 u16 dbi = 1; /* the buffer [0] is b0 */
376 src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
377 src_left = sb0->current_length - l234_sz - first_data_size;
379 tso_fixup_segmented_buf (vm, b0, tcp_flags_no_fin_psh, is_l2, is_ip6,
382 /* grab a second buffer and prepare the loop */
383 ASSERT (dbi < vec_len (ptd->split_buffers));
384 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
385 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
386 &dst_left, next_tcp_seq, default_bflags,
389 /* an arbitrary large number to catch the runaway loops */
391 while (total_src_left)
394 clib_panic ("infinite loop detected");
395 u16 bytes_to_copy = clib_min (src_left, dst_left);
397 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
399 src_left -= bytes_to_copy;
400 src_ptr += bytes_to_copy;
401 total_src_left -= bytes_to_copy;
402 dst_left -= bytes_to_copy;
403 dst_ptr += bytes_to_copy;
404 next_tcp_seq += bytes_to_copy;
405 cdb0->current_length += bytes_to_copy;
409 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
410 u32 next_bi = csb0->next_buffer;
412 /* init src to the next buffer in chain */
416 csb0 = vlib_get_buffer (vm, csbi0);
417 src_left = csb0->current_length;
418 src_ptr = vlib_buffer_get_current (csb0);
422 ASSERT (total_src_left == 0);
426 if (0 == dst_left && total_src_left)
428 n_tx_bytes += cdb0->current_length;
429 tso_fixup_segmented_buf (vm, cdb0, tcp_flags_no_fin_psh, is_l2,
431 ASSERT (dbi < vec_len (ptd->split_buffers));
432 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
433 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
434 gso_size, &dst_ptr, &dst_left,
435 next_tcp_seq, default_bflags, gho);
439 tso_fixup_segmented_buf (vm, cdb0, save_tcp_flags, is_l2, is_ip6, gho);
441 n_tx_bytes += cdb0->current_length;
443 n_tx_bytes += b0->current_length;
447 static_always_inline void
448 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
449 vlib_node_runtime_t * node, u32 * pbi0,
450 u32 sw_if_index, u32 drop_error_code)
452 u32 thread_index = vm->thread_index;
454 vlib_simple_counter_main_t *cm;
456 vec_elt_at_index (vnm->interface_main.sw_if_counters,
457 VNET_INTERFACE_COUNTER_TX_ERROR);
458 vlib_increment_simple_counter (cm, thread_index, sw_if_index, 1);
460 vlib_error_drop_buffers (vm, node, pbi0,
461 /* buffer stride */ 1,
463 VNET_INTERFACE_OUTPUT_NEXT_DROP,
464 node->node_index, drop_error_code);
467 static_always_inline uword
468 vnet_gso_node_inline (vlib_main_t * vm,
469 vlib_node_runtime_t * node,
470 vlib_frame_t * frame,
472 vnet_hw_interface_t * hi,
473 int is_l2, int is_ip4, int is_ip6, int do_segmentation)
476 u32 next_index = node->cached_next_index;
477 u32 *from = vlib_frame_vector_args (frame);
478 u32 n_left_from = frame->n_vectors;
479 u32 *from_end = from + n_left_from;
480 u32 thread_index = vm->thread_index;
481 vnet_interface_main_t *im = &vnm->interface_main;
482 vnet_interface_per_thread_data_t *ptd =
483 vec_elt_at_index (im->per_thread_data, thread_index);
484 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
486 vlib_get_buffers (vm, from, b, n_left_from);
488 while (n_left_from > 0)
492 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
494 if (!do_segmentation)
495 while (from + 8 <= from_end && n_left_to_next >= 4)
497 u32 bi0, bi1, bi2, bi3;
498 u32 next0, next1, next2, next3;
499 u32 swif0, swif1, swif2, swif3;
500 gso_trace_t *t0, *t1, *t2, *t3;
501 vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
503 /* Prefetch next iteration. */
504 vlib_prefetch_buffer_header (b[4], LOAD);
505 vlib_prefetch_buffer_header (b[5], LOAD);
506 vlib_prefetch_buffer_header (b[6], LOAD);
507 vlib_prefetch_buffer_header (b[7], LOAD);
518 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
519 swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
520 swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
521 swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
523 if (PREDICT_FALSE (hi->sw_if_index != swif0))
525 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
526 if ((hi0->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) ==
528 (b[0]->flags & VNET_BUFFER_F_GSO))
531 if (PREDICT_FALSE (hi->sw_if_index != swif1))
533 hi1 = vnet_get_sup_hw_interface (vnm, swif1);
534 if (!(hi1->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) &&
535 (b[1]->flags & VNET_BUFFER_F_GSO))
538 if (PREDICT_FALSE (hi->sw_if_index != swif2))
540 hi2 = vnet_get_sup_hw_interface (vnm, swif2);
541 if ((hi2->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) ==
543 (b[2]->flags & VNET_BUFFER_F_GSO))
546 if (PREDICT_FALSE (hi->sw_if_index != swif3))
548 hi3 = vnet_get_sup_hw_interface (vnm, swif3);
549 if (!(hi3->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) &&
550 (b[3]->flags & VNET_BUFFER_F_GSO))
554 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
556 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
557 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
558 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
559 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
560 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
563 if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
565 t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
566 t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
567 t1->gso_size = vnet_buffer2 (b[1])->gso_size;
568 t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
569 vnet_generic_header_offset_parser (b[1], &t1->gho, is_l2,
572 if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
574 t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
575 t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
576 t2->gso_size = vnet_buffer2 (b[2])->gso_size;
577 t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
578 vnet_generic_header_offset_parser (b[2], &t2->gho, is_l2,
581 if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
583 t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
584 t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
585 t3->gso_size = vnet_buffer2 (b[3])->gso_size;
586 t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
587 vnet_generic_header_offset_parser (b[3], &t3->gho, is_l2,
598 vnet_feature_next (&next0, b[0]);
599 vnet_feature_next (&next1, b[1]);
600 vnet_feature_next (&next2, b[2]);
601 vnet_feature_next (&next3, b[3]);
602 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
603 n_left_to_next, bi0, bi1, bi2,
604 bi3, next0, next1, next2, next3);
608 while (from + 1 <= from_end && n_left_to_next > 0)
612 vnet_hw_interface_t *hi0;
614 u32 do_segmentation0 = 0;
616 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
617 if (PREDICT_FALSE (hi->sw_if_index != swif0))
619 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
620 if ((hi0->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) == 0 &&
621 (b[0]->flags & VNET_BUFFER_F_GSO))
622 do_segmentation0 = 1;
625 do_segmentation0 = do_segmentation;
627 /* speculatively enqueue b0 to the current next frame */
628 to_next[0] = bi0 = from[0];
634 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
636 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
637 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
638 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
639 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
640 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
644 if (do_segmentation0)
646 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
649 * Undo the enqueue of the b0 - it is not going anywhere,
650 * and will be freed either after it's segmented or
651 * when dropped, if there is no buffers to segment into.
655 /* undo the counting. */
656 generic_header_offset_t gho = { 0 };
657 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
659 u32 inner_is_ip6 = is_ip6;
661 vnet_generic_header_offset_parser (b[0], &gho, is_l2,
664 if (PREDICT_FALSE (gho.gho_flags & GHO_F_TUNNEL))
667 (gho.gho_flags & (GHO_F_GRE_TUNNEL |
668 GHO_F_GENEVE_TUNNEL)))
670 /* not supported yet */
671 drop_one_buffer_and_count (vm, vnm, node, from - 1,
673 VNET_INTERFACE_OUTPUT_ERROR_UNHANDLED_GSO_TYPE);
678 vnet_get_inner_header (b[0], &gho);
680 n_bytes_b0 -= gho.outer_hdr_sz;
681 inner_is_ip6 = (gho.gho_flags & GHO_F_IP6) != 0;
685 tso_segment_buffer (vm, ptd, bi0, b[0], &gho, n_bytes_b0,
686 is_l2, inner_is_ip6);
688 if (PREDICT_FALSE (n_tx_bytes == 0))
690 drop_one_buffer_and_count (vm, vnm, node, from - 1,
692 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
698 if (PREDICT_FALSE (gho.gho_flags & GHO_F_VXLAN_TUNNEL))
700 vnet_get_outer_header (b[0], &gho);
702 tso_segment_vxlan_tunnel_fixup (vm, ptd, b[0], &gho);
706 (gho.gho_flags & (GHO_F_IPIP_TUNNEL |
707 GHO_F_IPIP6_TUNNEL)))
709 vnet_get_outer_header (b[0], &gho);
711 tso_segment_ipip_tunnel_fixup (vm, ptd, b[0], &gho);
714 u16 n_tx_bufs = vec_len (ptd->split_buffers);
715 u32 *from_seg = ptd->split_buffers;
717 while (n_tx_bufs > 0)
721 while (n_tx_bufs > 0 && n_left_to_next > 0)
723 sbi0 = to_next[0] = from_seg[0];
724 sb0 = vlib_get_buffer (vm, sbi0);
725 ASSERT (sb0->current_length > 0);
731 vnet_feature_next (&next0, sb0);
732 vlib_validate_buffer_enqueue_x1 (vm, node,
738 vlib_put_next_frame (vm, node, next_index,
741 vlib_get_next_frame (vm, node, next_index,
742 to_next, n_left_to_next);
744 /* The buffers were enqueued. Reset the length */
745 _vec_len (ptd->split_buffers) = 0;
746 /* Free the now segmented buffer */
747 vlib_buffer_free_one (vm, bi0);
753 vnet_feature_next (&next0, b[0]);
754 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
755 n_left_to_next, bi0, next0);
758 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
761 return frame->n_vectors;
764 static_always_inline uword
765 vnet_gso_inline (vlib_main_t * vm,
766 vlib_node_runtime_t * node, vlib_frame_t * frame, int is_l2,
767 int is_ip4, int is_ip6)
769 vnet_main_t *vnm = vnet_get_main ();
770 vnet_hw_interface_t *hi;
772 if (frame->n_vectors > 0)
774 u32 *from = vlib_frame_vector_args (frame);
775 vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
776 hi = vnet_get_sup_hw_interface (vnm,
777 vnet_buffer (b)->sw_if_index[VLIB_TX]);
779 if (hi->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO)
780 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
781 is_l2, is_ip4, is_ip6,
782 /* do_segmentation */ 0);
784 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
785 is_l2, is_ip4, is_ip6,
786 /* do_segmentation */ 1);
791 VLIB_NODE_FN (gso_l2_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
792 vlib_frame_t * frame)
794 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 1 /* ip4 */ ,
798 VLIB_NODE_FN (gso_l2_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
799 vlib_frame_t * frame)
801 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 0 /* ip4 */ ,
805 VLIB_NODE_FN (gso_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
806 vlib_frame_t * frame)
808 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 1 /* ip4 */ ,
812 VLIB_NODE_FN (gso_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
813 vlib_frame_t * frame)
815 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 0 /* ip4 */ ,
821 VLIB_REGISTER_NODE (gso_l2_ip4_node) = {
822 .vector_size = sizeof (u32),
823 .format_trace = format_gso_trace,
824 .type = VLIB_NODE_TYPE_INTERNAL,
827 .name = "gso-l2-ip4",
830 VLIB_REGISTER_NODE (gso_l2_ip6_node) = {
831 .vector_size = sizeof (u32),
832 .format_trace = format_gso_trace,
833 .type = VLIB_NODE_TYPE_INTERNAL,
836 .name = "gso-l2-ip6",
839 VLIB_REGISTER_NODE (gso_ip4_node) = {
840 .vector_size = sizeof (u32),
841 .format_trace = format_gso_trace,
842 .type = VLIB_NODE_TYPE_INTERNAL,
848 VLIB_REGISTER_NODE (gso_ip6_node) = {
849 .vector_size = sizeof (u32),
850 .format_trace = format_gso_trace,
851 .type = VLIB_NODE_TYPE_INTERNAL,
857 VNET_FEATURE_INIT (gso_l2_ip4_node, static) = {
858 .arc_name = "l2-output-ip4",
859 .node_name = "gso-l2-ip4",
860 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
863 VNET_FEATURE_INIT (gso_l2_ip6_node, static) = {
864 .arc_name = "l2-output-ip6",
865 .node_name = "gso-l2-ip6",
866 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
869 VNET_FEATURE_INIT (gso_ip4_node, static) = {
870 .arc_name = "ip4-output",
871 .node_name = "gso-ip4",
872 .runs_before = VNET_FEATURES ("ipsec4-output-feature"),
875 VNET_FEATURE_INIT (gso_ip6_node, static) = {
876 .arc_name = "ip6-output",
877 .node_name = "gso-ip6",
878 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
882 * fd.io coding-style-patch-verification: ON
885 * eval: (c-set-style "gnu")