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 %U",
46 t->gso_size, t->gso_l4_hdr_sz, format_generic_header_offset,
52 format (s, "non-gso buffer %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;
103 static_always_inline void
104 tso_segment_vxlan_tunnel_headers_fixup (vlib_main_t * vm, vlib_buffer_t * b,
105 generic_header_offset_t * gho)
108 ip4_header_t *ip4 = 0;
109 ip6_header_t *ip6 = 0;
110 udp_header_t *udp = 0;
113 (ip4_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
115 (ip6_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
117 (udp_header_t *) (vlib_buffer_get_current (b) + gho->outer_l4_hdr_offset);
119 if (gho->gho_flags & GHO_F_OUTER_IP4)
121 proto = ip4->protocol;
123 clib_host_to_net_u16 (b->current_length - gho->outer_l3_hdr_offset);
124 ip4->checksum = ip4_header_checksum (ip4);
126 else if (gho->gho_flags & GHO_F_OUTER_IP6)
128 proto = ip6->protocol;
129 ip6->payload_length =
130 clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
132 if (proto == IP_PROTOCOL_UDP)
136 clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
138 if (gho->gho_flags & GHO_F_OUTER_IP6)
141 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
143 else if (gho->gho_flags & GHO_F_OUTER_IP4)
145 udp->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
147 b->flags &= ~VNET_BUFFER_F_OFFLOAD_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 b0->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
291 clib_host_to_net_u16 (b0->current_length - gho->l3_hdr_offset);
292 if (gho->gho_flags & GHO_F_IP4)
293 ip4->checksum = ip4_header_checksum (ip4);
294 if (gho->gho_flags & GHO_F_TCP)
297 tcp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip4);
299 b0->flags &= ~VNET_BUFFER_F_OFFLOAD_TCP_CKSUM;
300 b0->flags &= ~VNET_BUFFER_F_OFFLOAD_IP_CKSUM;
303 if (!is_l2 && ((gho->gho_flags & GHO_F_TUNNEL) == 0))
305 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
307 ip_adjacency_t *adj0 = adj_get (adj_index0);
309 if (adj0->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN &&
310 adj0->sub_type.midchain.fixup_func)
311 /* calls e.g. ipip44_fixup */
312 adj0->sub_type.midchain.fixup_func
313 (vm, adj0, b0, adj0->sub_type.midchain.fixup_data);
318 * Allocate the necessary number of ptd->split_buffers,
319 * and segment the possibly chained buffer(s) from b0 into
322 * Return the cumulative number of bytes sent or zero
323 * if allocation failed.
326 static_always_inline u32
327 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
328 u32 sbi0, vlib_buffer_t * sb0,
329 generic_header_offset_t * gho, u32 n_bytes_b0, int is_l2,
333 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
335 u8 save_tcp_flags = 0;
336 u8 tcp_flags_no_fin_psh = 0;
337 u32 next_tcp_seq = 0;
340 (tcp_header_t *) (vlib_buffer_get_current (sb0) + gho->l4_hdr_offset);
341 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
342 /* store original flags for last packet and reset FIN and PSH */
343 save_tcp_flags = tcp->flags;
344 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
348 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
349 u16 l234_sz = gho->hdr_sz;
350 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
351 next_tcp_seq += first_data_size;
355 (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size, first_data_size, gho)))
358 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
359 tso_init_buf_from_template_base (b0, sb0, default_bflags,
360 l234_sz + first_data_size);
362 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
365 /* Need to copy more segments */
366 u8 *src_ptr, *dst_ptr;
367 u16 src_left, dst_left;
368 /* current source buffer */
369 vlib_buffer_t *csb0 = sb0;
371 /* current dest buffer */
373 u16 dbi = 1; /* the buffer [0] is b0 */
375 src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
376 src_left = sb0->current_length - l234_sz - first_data_size;
378 tso_fixup_segmented_buf (vm, b0, tcp_flags_no_fin_psh, is_l2, is_ip6,
381 /* grab a second buffer and prepare the loop */
382 ASSERT (dbi < vec_len (ptd->split_buffers));
383 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
384 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
385 &dst_left, next_tcp_seq, default_bflags,
388 /* an arbitrary large number to catch the runaway loops */
390 while (total_src_left)
393 clib_panic ("infinite loop detected");
394 u16 bytes_to_copy = clib_min (src_left, dst_left);
396 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
398 src_left -= bytes_to_copy;
399 src_ptr += bytes_to_copy;
400 total_src_left -= bytes_to_copy;
401 dst_left -= bytes_to_copy;
402 dst_ptr += bytes_to_copy;
403 next_tcp_seq += bytes_to_copy;
404 cdb0->current_length += bytes_to_copy;
408 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
409 u32 next_bi = csb0->next_buffer;
411 /* init src to the next buffer in chain */
415 csb0 = vlib_get_buffer (vm, csbi0);
416 src_left = csb0->current_length;
417 src_ptr = vlib_buffer_get_current (csb0);
421 ASSERT (total_src_left == 0);
425 if (0 == dst_left && total_src_left)
427 n_tx_bytes += cdb0->current_length;
428 tso_fixup_segmented_buf (vm, cdb0, tcp_flags_no_fin_psh, is_l2,
430 ASSERT (dbi < vec_len (ptd->split_buffers));
431 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
432 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
433 gso_size, &dst_ptr, &dst_left,
434 next_tcp_seq, default_bflags, gho);
438 tso_fixup_segmented_buf (vm, cdb0, save_tcp_flags, is_l2, is_ip6, gho);
440 n_tx_bytes += cdb0->current_length;
442 n_tx_bytes += b0->current_length;
446 static_always_inline void
447 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
448 vlib_node_runtime_t * node, u32 * pbi0,
449 u32 sw_if_index, u32 drop_error_code)
451 u32 thread_index = vm->thread_index;
453 vlib_simple_counter_main_t *cm;
455 vec_elt_at_index (vnm->interface_main.sw_if_counters,
456 VNET_INTERFACE_COUNTER_TX_ERROR);
457 vlib_increment_simple_counter (cm, thread_index, sw_if_index, 1);
459 vlib_error_drop_buffers (vm, node, pbi0,
460 /* buffer stride */ 1,
462 VNET_INTERFACE_OUTPUT_NEXT_DROP,
463 node->node_index, drop_error_code);
466 static_always_inline uword
467 vnet_gso_node_inline (vlib_main_t * vm,
468 vlib_node_runtime_t * node,
469 vlib_frame_t * frame,
471 vnet_hw_interface_t * hi,
472 int is_l2, int is_ip4, int is_ip6, int do_segmentation)
475 u32 next_index = node->cached_next_index;
476 u32 *from = vlib_frame_vector_args (frame);
477 u32 n_left_from = frame->n_vectors;
478 u32 *from_end = from + n_left_from;
479 u32 thread_index = vm->thread_index;
480 vnet_interface_main_t *im = &vnm->interface_main;
481 vnet_interface_per_thread_data_t *ptd =
482 vec_elt_at_index (im->per_thread_data, thread_index);
483 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
485 vlib_get_buffers (vm, from, b, n_left_from);
487 while (n_left_from > 0)
491 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
493 if (!do_segmentation)
494 while (from + 8 <= from_end && n_left_to_next >= 4)
496 u32 bi0, bi1, bi2, bi3;
497 u32 next0, next1, next2, next3;
498 u32 swif0, swif1, swif2, swif3;
499 gso_trace_t *t0, *t1, *t2, *t3;
500 vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
502 /* Prefetch next iteration. */
503 vlib_prefetch_buffer_header (b[4], LOAD);
504 vlib_prefetch_buffer_header (b[5], LOAD);
505 vlib_prefetch_buffer_header (b[6], LOAD);
506 vlib_prefetch_buffer_header (b[7], LOAD);
517 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
518 swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
519 swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
520 swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
522 if (PREDICT_FALSE (hi->sw_if_index != swif0))
524 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
525 if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
526 (b[0]->flags & VNET_BUFFER_F_GSO))
529 if (PREDICT_FALSE (hi->sw_if_index != swif1))
531 hi1 = vnet_get_sup_hw_interface (vnm, swif1);
532 if (!(hi1->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
533 (b[1]->flags & VNET_BUFFER_F_GSO))
536 if (PREDICT_FALSE (hi->sw_if_index != swif2))
538 hi2 = vnet_get_sup_hw_interface (vnm, swif2);
539 if ((hi2->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
540 (b[2]->flags & VNET_BUFFER_F_GSO))
543 if (PREDICT_FALSE (hi->sw_if_index != swif3))
545 hi3 = vnet_get_sup_hw_interface (vnm, swif3);
546 if (!(hi3->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) &&
547 (b[3]->flags & VNET_BUFFER_F_GSO))
551 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
553 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
554 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
555 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
556 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
557 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
560 if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
562 t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
563 t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
564 t1->gso_size = vnet_buffer2 (b[1])->gso_size;
565 t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
566 vnet_generic_header_offset_parser (b[1], &t1->gho, is_l2,
569 if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
571 t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
572 t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
573 t2->gso_size = vnet_buffer2 (b[2])->gso_size;
574 t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
575 vnet_generic_header_offset_parser (b[2], &t2->gho, is_l2,
578 if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
580 t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
581 t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
582 t3->gso_size = vnet_buffer2 (b[3])->gso_size;
583 t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
584 vnet_generic_header_offset_parser (b[3], &t3->gho, is_l2,
595 vnet_feature_next (&next0, b[0]);
596 vnet_feature_next (&next1, b[1]);
597 vnet_feature_next (&next2, b[2]);
598 vnet_feature_next (&next3, b[3]);
599 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
600 n_left_to_next, bi0, bi1, bi2,
601 bi3, next0, next1, next2, next3);
605 while (from + 1 <= from_end && n_left_to_next > 0)
609 vnet_hw_interface_t *hi0;
611 u32 do_segmentation0 = 0;
613 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
614 if (PREDICT_FALSE (hi->sw_if_index != swif0))
616 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
617 if ((hi0->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO) == 0 &&
618 (b[0]->flags & VNET_BUFFER_F_GSO))
619 do_segmentation0 = 1;
622 do_segmentation0 = do_segmentation;
624 /* speculatively enqueue b0 to the current next frame */
625 to_next[0] = bi0 = from[0];
631 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
633 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
634 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
635 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
636 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
637 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
641 if (do_segmentation0)
643 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
646 * Undo the enqueue of the b0 - it is not going anywhere,
647 * and will be freed either after it's segmented or
648 * when dropped, if there is no buffers to segment into.
652 /* undo the counting. */
653 generic_header_offset_t gho = { 0 };
654 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
656 u32 inner_is_ip6 = is_ip6;
658 vnet_generic_header_offset_parser (b[0], &gho, is_l2,
661 if (PREDICT_FALSE (gho.gho_flags & GHO_F_TUNNEL))
664 (gho.gho_flags & (GHO_F_GRE_TUNNEL |
665 GHO_F_GENEVE_TUNNEL)))
667 /* not supported yet */
668 drop_one_buffer_and_count (vm, vnm, node, from - 1,
670 VNET_INTERFACE_OUTPUT_ERROR_UNHANDLED_GSO_TYPE);
675 vnet_get_inner_header (b[0], &gho);
677 n_bytes_b0 -= gho.outer_hdr_sz;
678 inner_is_ip6 = (gho.gho_flags & GHO_F_IP6) != 0;
682 tso_segment_buffer (vm, ptd, bi0, b[0], &gho, n_bytes_b0,
683 is_l2, inner_is_ip6);
685 if (PREDICT_FALSE (n_tx_bytes == 0))
687 drop_one_buffer_and_count (vm, vnm, node, from - 1,
689 VNET_INTERFACE_OUTPUT_ERROR_NO_BUFFERS_FOR_GSO);
695 if (PREDICT_FALSE (gho.gho_flags & GHO_F_VXLAN_TUNNEL))
697 vnet_get_outer_header (b[0], &gho);
699 tso_segment_vxlan_tunnel_fixup (vm, ptd, b[0], &gho);
703 (gho.gho_flags & (GHO_F_IPIP_TUNNEL |
704 GHO_F_IPIP6_TUNNEL)))
706 vnet_get_outer_header (b[0], &gho);
708 tso_segment_ipip_tunnel_fixup (vm, ptd, b[0], &gho);
711 u16 n_tx_bufs = vec_len (ptd->split_buffers);
712 u32 *from_seg = ptd->split_buffers;
714 while (n_tx_bufs > 0)
718 while (n_tx_bufs > 0 && n_left_to_next > 0)
720 sbi0 = to_next[0] = from_seg[0];
721 sb0 = vlib_get_buffer (vm, sbi0);
722 ASSERT (sb0->current_length > 0);
728 vnet_feature_next (&next0, sb0);
729 vlib_validate_buffer_enqueue_x1 (vm, node,
735 vlib_put_next_frame (vm, node, next_index,
738 vlib_get_next_frame (vm, node, next_index,
739 to_next, n_left_to_next);
741 /* The buffers were enqueued. Reset the length */
742 _vec_len (ptd->split_buffers) = 0;
743 /* Free the now segmented buffer */
744 vlib_buffer_free_one (vm, bi0);
750 vnet_feature_next (&next0, b[0]);
751 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
752 n_left_to_next, bi0, next0);
755 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
758 return frame->n_vectors;
761 static_always_inline uword
762 vnet_gso_inline (vlib_main_t * vm,
763 vlib_node_runtime_t * node, vlib_frame_t * frame, int is_l2,
764 int is_ip4, int is_ip6)
766 vnet_main_t *vnm = vnet_get_main ();
767 vnet_hw_interface_t *hi;
769 if (frame->n_vectors > 0)
771 u32 *from = vlib_frame_vector_args (frame);
772 vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
773 hi = vnet_get_sup_hw_interface (vnm,
774 vnet_buffer (b)->sw_if_index[VLIB_TX]);
776 if (hi->flags & VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO)
777 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
778 is_l2, is_ip4, is_ip6,
779 /* do_segmentation */ 0);
781 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
782 is_l2, is_ip4, is_ip6,
783 /* do_segmentation */ 1);
788 VLIB_NODE_FN (gso_l2_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
789 vlib_frame_t * frame)
791 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 1 /* ip4 */ ,
795 VLIB_NODE_FN (gso_l2_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
796 vlib_frame_t * frame)
798 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 0 /* ip4 */ ,
802 VLIB_NODE_FN (gso_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
803 vlib_frame_t * frame)
805 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 1 /* ip4 */ ,
809 VLIB_NODE_FN (gso_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
810 vlib_frame_t * frame)
812 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 0 /* ip4 */ ,
818 VLIB_REGISTER_NODE (gso_l2_ip4_node) = {
819 .vector_size = sizeof (u32),
820 .format_trace = format_gso_trace,
821 .type = VLIB_NODE_TYPE_INTERNAL,
824 .name = "gso-l2-ip4",
827 VLIB_REGISTER_NODE (gso_l2_ip6_node) = {
828 .vector_size = sizeof (u32),
829 .format_trace = format_gso_trace,
830 .type = VLIB_NODE_TYPE_INTERNAL,
833 .name = "gso-l2-ip6",
836 VLIB_REGISTER_NODE (gso_ip4_node) = {
837 .vector_size = sizeof (u32),
838 .format_trace = format_gso_trace,
839 .type = VLIB_NODE_TYPE_INTERNAL,
845 VLIB_REGISTER_NODE (gso_ip6_node) = {
846 .vector_size = sizeof (u32),
847 .format_trace = format_gso_trace,
848 .type = VLIB_NODE_TYPE_INTERNAL,
854 VNET_FEATURE_INIT (gso_l2_ip4_node, static) = {
855 .arc_name = "l2-output-ip4",
856 .node_name = "gso-l2-ip4",
857 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
860 VNET_FEATURE_INIT (gso_l2_ip6_node, static) = {
861 .arc_name = "l2-output-ip6",
862 .node_name = "gso-l2-ip6",
863 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
866 VNET_FEATURE_INIT (gso_ip4_node, static) = {
867 .arc_name = "ip4-output",
868 .node_name = "gso-ip4",
869 .runs_before = VNET_FEATURES ("ipsec4-output-feature"),
872 VNET_FEATURE_INIT (gso_ip6_node, static) = {
873 .arc_name = "ip6-output",
874 .node_name = "gso-ip6",
875 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
879 * fd.io coding-style-patch-verification: ON
882 * eval: (c-set-style "gnu")