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>
28 #define foreach_gso_error \
29 _ (NO_BUFFERS, "no buffers to segment GSO") \
30 _ (UNHANDLED_TYPE, "unhandled gso type")
32 static char *gso_error_strings[] = {
33 #define _(sym, string) string,
40 #define _(sym, str) GSO_ERROR_##sym,
57 generic_header_offset_t gho;
61 format_gso_trace (u8 * s, va_list * args)
63 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
64 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
65 gso_trace_t *t = va_arg (*args, gso_trace_t *);
67 if (t->flags & VNET_BUFFER_F_GSO)
69 s = format (s, "gso_sz %d gso_l4_hdr_sz %d\n%U",
70 t->gso_size, t->gso_l4_hdr_sz, format_generic_header_offset,
76 format (s, "non-gso buffer\n%U", format_generic_header_offset,
83 static_always_inline u16
84 tso_segment_ipip_tunnel_fixup (vlib_main_t * vm,
85 vnet_interface_per_thread_data_t * ptd,
87 generic_header_offset_t * gho)
89 u16 n_tx_bufs = vec_len (ptd->split_buffers);
90 u16 i = 0, n_tx_bytes = 0;
94 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
95 vnet_get_outer_header (b0, gho);
96 clib_memcpy_fast (vlib_buffer_get_current (b0),
97 vlib_buffer_get_current (sb0), gho->outer_hdr_sz);
100 (ip4_header_t *) (vlib_buffer_get_current (b0) +
101 gho->outer_l3_hdr_offset);
103 (ip6_header_t *) (vlib_buffer_get_current (b0) +
104 gho->outer_l3_hdr_offset);
106 if (gho->gho_flags & GHO_F_OUTER_IP4)
109 clib_host_to_net_u16 (b0->current_length -
110 gho->outer_l3_hdr_offset);
111 ip4->checksum = ip4_header_checksum (ip4);
113 else if (gho->gho_flags & GHO_F_OUTER_IP6)
115 ip6->payload_length =
116 clib_host_to_net_u16 (b0->current_length -
117 gho->outer_l4_hdr_offset);
120 n_tx_bytes += gho->outer_hdr_sz;
126 static_always_inline void
127 tso_segment_vxlan_tunnel_headers_fixup (vlib_main_t * vm, vlib_buffer_t * b,
128 generic_header_offset_t * gho)
131 ip4_header_t *ip4 = 0;
132 ip6_header_t *ip6 = 0;
133 udp_header_t *udp = 0;
136 (ip4_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
138 (ip6_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
140 (udp_header_t *) (vlib_buffer_get_current (b) + gho->outer_l4_hdr_offset);
142 if (gho->gho_flags & GHO_F_OUTER_IP4)
144 proto = ip4->protocol;
146 clib_host_to_net_u16 (b->current_length - gho->outer_l3_hdr_offset);
147 ip4->checksum = ip4_header_checksum (ip4);
149 else if (gho->gho_flags & GHO_F_OUTER_IP6)
151 proto = ip6->protocol;
152 ip6->payload_length =
153 clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
155 if (proto == IP_PROTOCOL_UDP)
159 clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
161 if (gho->gho_flags & GHO_F_OUTER_IP6)
164 ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
166 else if (gho->gho_flags & GHO_F_OUTER_IP4)
168 udp->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
170 /* FIXME: it should be OUTER_UDP_CKSUM */
171 vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
175 static_always_inline u16
176 tso_segment_vxlan_tunnel_fixup (vlib_main_t * vm,
177 vnet_interface_per_thread_data_t * ptd,
179 generic_header_offset_t * gho)
181 u16 n_tx_bufs = vec_len (ptd->split_buffers);
182 u16 i = 0, n_tx_bytes = 0;
184 while (i < n_tx_bufs)
186 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
187 vnet_get_outer_header (b0, gho);
188 clib_memcpy_fast (vlib_buffer_get_current (b0),
189 vlib_buffer_get_current (sb0), gho->outer_hdr_sz);
191 tso_segment_vxlan_tunnel_headers_fixup (vm, b0, gho);
192 n_tx_bytes += gho->outer_hdr_sz;
198 static_always_inline u16
199 tso_alloc_tx_bufs (vlib_main_t * vm,
200 vnet_interface_per_thread_data_t * ptd,
201 vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
202 u16 gso_size, u16 first_data_size,
203 generic_header_offset_t * gho)
206 u16 first_packet_length = l234_sz + first_data_size;
209 * size is the amount of data per segmented buffer except the 1st
211 * l2_hdr_offset is an offset == current_data of vlib_buffer_t.
212 * l234_sz is hdr_sz from l2_hdr_offset.
215 clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz
216 - gho->l2_hdr_offset);
219 * First segmented buffer length is calculated separately.
220 * As it may contain less data than gso_size (when gso_size is
221 * greater than current_length of 1st buffer from GSO chained
222 * buffers) and/or size calculated above.
227 * Total packet length minus first packet length including l234 header.
228 * rounded-up division
230 ASSERT (n_bytes_b0 > first_packet_length);
231 n_bufs += ((n_bytes_b0 - first_packet_length + (size - 1)) / size);
233 vec_validate (ptd->split_buffers, n_bufs - 1);
235 n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
236 if (n_alloc < n_bufs)
238 vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
244 static_always_inline void
245 tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
246 u32 flags, u16 length)
248 /* copying objects from cacheline 0 */
249 nb0->current_data = b0->current_data;
250 nb0->current_length = length;
251 nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
252 nb0->flow_id = b0->flow_id;
253 nb0->error = b0->error;
254 nb0->current_config_index = b0->current_config_index;
255 clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
257 /* copying objects from cacheline 1 */
258 nb0->trace_handle = b0->trace_handle;
259 nb0->total_length_not_including_first_buffer = 0;
262 clib_memcpy_fast (vlib_buffer_get_current (nb0),
263 vlib_buffer_get_current (b0), length);
266 static_always_inline void
267 tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
268 vlib_buffer_t * b0, u16 template_data_sz,
269 u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
270 u32 next_tcp_seq, u32 flags,
271 generic_header_offset_t * gho)
273 tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
277 vlib_buffer_get_default_data_size (vm) - (template_data_sz +
279 *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
282 (tcp_header_t *) (vlib_buffer_get_current (nb0) + gho->l4_hdr_offset);
283 tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
286 static_always_inline void
287 tso_fixup_segmented_buf (vlib_main_t * vm, vlib_buffer_t * b0, u8 tcp_flags,
288 int is_l2, int is_ip6, generic_header_offset_t * gho)
291 (ip4_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
293 (ip6_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
295 (tcp_header_t *) (vlib_buffer_get_current (b0) + gho->l4_hdr_offset);
297 tcp->flags = tcp_flags;
301 ip6->payload_length =
302 clib_host_to_net_u16 (b0->current_length - gho->l4_hdr_offset);
303 if (gho->gho_flags & GHO_F_TCP)
308 ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus);
309 vnet_buffer_offload_flags_clear (b0,
310 VNET_BUFFER_OFFLOAD_F_TCP_CKSUM);
316 clib_host_to_net_u16 (b0->current_length - gho->l3_hdr_offset);
317 if (gho->gho_flags & GHO_F_IP4)
318 ip4->checksum = ip4_header_checksum (ip4);
319 if (gho->gho_flags & GHO_F_TCP)
322 tcp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip4);
324 vnet_buffer_offload_flags_clear (b0, (VNET_BUFFER_OFFLOAD_F_IP_CKSUM |
325 VNET_BUFFER_OFFLOAD_F_TCP_CKSUM));
328 if (!is_l2 && ((gho->gho_flags & GHO_F_TUNNEL) == 0))
330 u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
332 ip_adjacency_t *adj0 = adj_get (adj_index0);
334 if (adj0->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN &&
335 adj0->sub_type.midchain.fixup_func)
336 /* calls e.g. ipip44_fixup */
337 adj0->sub_type.midchain.fixup_func
338 (vm, adj0, b0, adj0->sub_type.midchain.fixup_data);
343 * Allocate the necessary number of ptd->split_buffers,
344 * and segment the possibly chained buffer(s) from b0 into
347 * Return the cumulative number of bytes sent or zero
348 * if allocation failed.
351 static_always_inline u32
352 tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
353 u32 sbi0, vlib_buffer_t * sb0,
354 generic_header_offset_t * gho, u32 n_bytes_b0, int is_l2,
358 u16 gso_size = vnet_buffer2 (sb0)->gso_size;
360 u8 save_tcp_flags = 0;
361 u8 tcp_flags_no_fin_psh = 0;
362 u32 next_tcp_seq = 0;
365 (tcp_header_t *) (vlib_buffer_get_current (sb0) + gho->l4_hdr_offset);
366 next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
367 /* store original flags for last packet and reset FIN and PSH */
368 save_tcp_flags = tcp->flags;
369 tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
373 sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
374 u16 l234_sz = gho->hdr_sz;
375 int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
376 next_tcp_seq += first_data_size;
380 (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size, first_data_size, gho)))
383 vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
384 tso_init_buf_from_template_base (b0, sb0, default_bflags,
385 l234_sz + first_data_size);
387 u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
390 /* Need to copy more segments */
391 u8 *src_ptr, *dst_ptr;
392 u16 src_left, dst_left;
393 /* current source buffer */
394 vlib_buffer_t *csb0 = sb0;
396 /* current dest buffer */
398 u16 dbi = 1; /* the buffer [0] is b0 */
400 src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
401 src_left = sb0->current_length - l234_sz - first_data_size;
403 tso_fixup_segmented_buf (vm, b0, tcp_flags_no_fin_psh, is_l2, is_ip6,
406 /* grab a second buffer and prepare the loop */
407 ASSERT (dbi < vec_len (ptd->split_buffers));
408 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
409 tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
410 &dst_left, next_tcp_seq, default_bflags,
413 /* an arbitrary large number to catch the runaway loops */
415 while (total_src_left)
418 clib_panic ("infinite loop detected");
419 u16 bytes_to_copy = clib_min (src_left, dst_left);
421 clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
423 src_left -= bytes_to_copy;
424 src_ptr += bytes_to_copy;
425 total_src_left -= bytes_to_copy;
426 dst_left -= bytes_to_copy;
427 dst_ptr += bytes_to_copy;
428 next_tcp_seq += bytes_to_copy;
429 cdb0->current_length += bytes_to_copy;
433 int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
434 u32 next_bi = csb0->next_buffer;
436 /* init src to the next buffer in chain */
440 csb0 = vlib_get_buffer (vm, csbi0);
441 src_left = csb0->current_length;
442 src_ptr = vlib_buffer_get_current (csb0);
446 ASSERT (total_src_left == 0);
450 if (0 == dst_left && total_src_left)
452 n_tx_bytes += cdb0->current_length;
453 tso_fixup_segmented_buf (vm, cdb0, tcp_flags_no_fin_psh, is_l2,
455 ASSERT (dbi < vec_len (ptd->split_buffers));
456 cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
457 tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
458 gso_size, &dst_ptr, &dst_left,
459 next_tcp_seq, default_bflags, gho);
463 tso_fixup_segmented_buf (vm, cdb0, save_tcp_flags, is_l2, is_ip6, gho);
465 n_tx_bytes += cdb0->current_length;
467 n_tx_bytes += b0->current_length;
471 static_always_inline void
472 drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
473 vlib_node_runtime_t * node, u32 * pbi0,
474 u32 sw_if_index, u32 drop_error_code)
476 u32 thread_index = vm->thread_index;
478 vlib_simple_counter_main_t *cm;
480 vec_elt_at_index (vnm->interface_main.sw_if_counters,
481 VNET_INTERFACE_COUNTER_TX_ERROR);
482 vlib_increment_simple_counter (cm, thread_index, sw_if_index, 1);
484 vlib_error_drop_buffers (vm, node, pbi0,
485 /* buffer stride */ 1,
486 /* n_buffers */ 1, GSO_NEXT_DROP, node->node_index,
490 static_always_inline uword
491 vnet_gso_node_inline (vlib_main_t * vm,
492 vlib_node_runtime_t * node,
493 vlib_frame_t * frame,
495 vnet_hw_interface_t * hi,
496 int is_l2, int is_ip4, int is_ip6, int do_segmentation)
499 u32 next_index = node->cached_next_index;
500 u32 *from = vlib_frame_vector_args (frame);
501 u32 n_left_from = frame->n_vectors;
502 u32 *from_end = from + n_left_from;
503 u32 thread_index = vm->thread_index;
504 vnet_interface_main_t *im = &vnm->interface_main;
505 vnet_interface_per_thread_data_t *ptd =
506 vec_elt_at_index (im->per_thread_data, thread_index);
507 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
509 vlib_get_buffers (vm, from, b, n_left_from);
511 while (n_left_from > 0)
515 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
517 if (!do_segmentation)
518 while (from + 8 <= from_end && n_left_to_next >= 4)
520 u32 bi0, bi1, bi2, bi3;
521 u32 next0, next1, next2, next3;
522 u32 swif0, swif1, swif2, swif3;
523 gso_trace_t *t0, *t1, *t2, *t3;
524 vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
526 /* Prefetch next iteration. */
527 vlib_prefetch_buffer_header (b[4], LOAD);
528 vlib_prefetch_buffer_header (b[5], LOAD);
529 vlib_prefetch_buffer_header (b[6], LOAD);
530 vlib_prefetch_buffer_header (b[7], LOAD);
541 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
542 swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
543 swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
544 swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
546 if (PREDICT_FALSE (hi->sw_if_index != swif0))
548 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
549 if ((hi0->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) ==
551 (b[0]->flags & VNET_BUFFER_F_GSO))
554 if (PREDICT_FALSE (hi->sw_if_index != swif1))
556 hi1 = vnet_get_sup_hw_interface (vnm, swif1);
557 if (!(hi1->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) &&
558 (b[1]->flags & VNET_BUFFER_F_GSO))
561 if (PREDICT_FALSE (hi->sw_if_index != swif2))
563 hi2 = vnet_get_sup_hw_interface (vnm, swif2);
564 if ((hi2->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) ==
566 (b[2]->flags & VNET_BUFFER_F_GSO))
569 if (PREDICT_FALSE (hi->sw_if_index != swif3))
571 hi3 = vnet_get_sup_hw_interface (vnm, swif3);
572 if (!(hi3->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) &&
573 (b[3]->flags & VNET_BUFFER_F_GSO))
577 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
579 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
580 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
581 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
582 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
583 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
586 if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
588 t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
589 t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
590 t1->gso_size = vnet_buffer2 (b[1])->gso_size;
591 t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
592 vnet_generic_header_offset_parser (b[1], &t1->gho, is_l2,
595 if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
597 t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
598 t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
599 t2->gso_size = vnet_buffer2 (b[2])->gso_size;
600 t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
601 vnet_generic_header_offset_parser (b[2], &t2->gho, is_l2,
604 if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
606 t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
607 t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
608 t3->gso_size = vnet_buffer2 (b[3])->gso_size;
609 t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
610 vnet_generic_header_offset_parser (b[3], &t3->gho, is_l2,
621 vnet_feature_next (&next0, b[0]);
622 vnet_feature_next (&next1, b[1]);
623 vnet_feature_next (&next2, b[2]);
624 vnet_feature_next (&next3, b[3]);
625 vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
626 n_left_to_next, bi0, bi1, bi2,
627 bi3, next0, next1, next2, next3);
631 while (from + 1 <= from_end && n_left_to_next > 0)
635 vnet_hw_interface_t *hi0;
637 u32 do_segmentation0 = 0;
639 swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
640 if (PREDICT_FALSE (hi->sw_if_index != swif0))
642 hi0 = vnet_get_sup_hw_interface (vnm, swif0);
643 if ((hi0->caps & VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO) == 0 &&
644 (b[0]->flags & VNET_BUFFER_F_GSO))
645 do_segmentation0 = 1;
648 do_segmentation0 = do_segmentation;
650 /* speculatively enqueue b0 to the current next frame */
651 to_next[0] = bi0 = from[0];
657 if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
659 t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
660 t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
661 t0->gso_size = vnet_buffer2 (b[0])->gso_size;
662 t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
663 vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
667 if (do_segmentation0)
669 if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
672 * Undo the enqueue of the b0 - it is not going anywhere,
673 * and will be freed either after it's segmented or
674 * when dropped, if there is no buffers to segment into.
678 /* undo the counting. */
679 generic_header_offset_t gho = { 0 };
680 u32 n_bytes_b0 = vlib_buffer_length_in_chain (vm, b[0]);
682 u32 inner_is_ip6 = is_ip6;
684 vnet_generic_header_offset_parser (b[0], &gho, is_l2,
687 if (PREDICT_FALSE (gho.gho_flags & GHO_F_TUNNEL))
690 (gho.gho_flags & (GHO_F_GRE_TUNNEL |
691 GHO_F_GENEVE_TUNNEL)))
693 /* not supported yet */
694 drop_one_buffer_and_count (vm, vnm, node, from - 1,
696 GSO_ERROR_UNHANDLED_TYPE);
701 vnet_get_inner_header (b[0], &gho);
703 n_bytes_b0 -= gho.outer_hdr_sz;
704 inner_is_ip6 = (gho.gho_flags & GHO_F_IP6) != 0;
708 tso_segment_buffer (vm, ptd, bi0, b[0], &gho, n_bytes_b0,
709 is_l2, inner_is_ip6);
711 if (PREDICT_FALSE (n_tx_bytes == 0))
713 drop_one_buffer_and_count (vm, vnm, node, from - 1,
715 GSO_ERROR_NO_BUFFERS);
721 if (PREDICT_FALSE (gho.gho_flags & GHO_F_VXLAN_TUNNEL))
723 vnet_get_outer_header (b[0], &gho);
725 tso_segment_vxlan_tunnel_fixup (vm, ptd, b[0], &gho);
729 (gho.gho_flags & (GHO_F_IPIP_TUNNEL |
730 GHO_F_IPIP6_TUNNEL)))
732 vnet_get_outer_header (b[0], &gho);
734 tso_segment_ipip_tunnel_fixup (vm, ptd, b[0], &gho);
737 u16 n_tx_bufs = vec_len (ptd->split_buffers);
738 u32 *from_seg = ptd->split_buffers;
740 while (n_tx_bufs > 0)
744 while (n_tx_bufs > 0 && n_left_to_next > 0)
746 sbi0 = to_next[0] = from_seg[0];
747 sb0 = vlib_get_buffer (vm, sbi0);
748 ASSERT (sb0->current_length > 0);
754 vnet_feature_next (&next0, sb0);
755 vlib_validate_buffer_enqueue_x1 (vm, node,
761 vlib_put_next_frame (vm, node, next_index,
764 vlib_get_next_frame (vm, node, next_index,
765 to_next, n_left_to_next);
767 /* The buffers were enqueued. Reset the length */
768 _vec_len (ptd->split_buffers) = 0;
769 /* Free the now segmented buffer */
770 vlib_buffer_free_one (vm, bi0);
776 vnet_feature_next (&next0, b[0]);
777 vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
778 n_left_to_next, bi0, next0);
781 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
784 return frame->n_vectors;
787 static_always_inline uword
788 vnet_gso_inline (vlib_main_t * vm,
789 vlib_node_runtime_t * node, vlib_frame_t * frame, int is_l2,
790 int is_ip4, int is_ip6)
792 vnet_main_t *vnm = vnet_get_main ();
793 vnet_hw_interface_t *hi;
795 if (frame->n_vectors > 0)
797 u32 *from = vlib_frame_vector_args (frame);
798 vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
799 hi = vnet_get_sup_hw_interface (vnm,
800 vnet_buffer (b)->sw_if_index[VLIB_TX]);
802 if (hi->caps & (VNET_HW_INTERFACE_CAP_SUPPORTS_TCP_GSO |
803 VNET_HW_INTERFACE_CAP_SUPPORTS_VXLAN_TNL_GSO))
804 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
805 is_l2, is_ip4, is_ip6,
806 /* do_segmentation */ 0);
808 return vnet_gso_node_inline (vm, node, frame, vnm, hi,
809 is_l2, is_ip4, is_ip6,
810 /* do_segmentation */ 1);
815 VLIB_NODE_FN (gso_l2_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
816 vlib_frame_t * frame)
818 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 1 /* ip4 */ ,
822 VLIB_NODE_FN (gso_l2_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
823 vlib_frame_t * frame)
825 return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 0 /* ip4 */ ,
829 VLIB_NODE_FN (gso_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
830 vlib_frame_t * frame)
832 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 1 /* ip4 */ ,
836 VLIB_NODE_FN (gso_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
837 vlib_frame_t * frame)
839 return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 0 /* ip4 */ ,
845 VLIB_REGISTER_NODE (gso_l2_ip4_node) = {
846 .vector_size = sizeof (u32),
847 .format_trace = format_gso_trace,
848 .type = VLIB_NODE_TYPE_INTERNAL,
849 .n_errors = ARRAY_LEN(gso_error_strings),
850 .error_strings = gso_error_strings,
851 .n_next_nodes = GSO_N_NEXT,
853 [GSO_NEXT_DROP] = "error-drop",
855 .name = "gso-l2-ip4",
858 VLIB_REGISTER_NODE (gso_l2_ip6_node) = {
859 .vector_size = sizeof (u32),
860 .format_trace = format_gso_trace,
861 .type = VLIB_NODE_TYPE_INTERNAL,
862 .n_errors = ARRAY_LEN(gso_error_strings),
863 .error_strings = gso_error_strings,
864 .n_next_nodes = GSO_N_NEXT,
866 [GSO_NEXT_DROP] = "error-drop",
868 .name = "gso-l2-ip6",
871 VLIB_REGISTER_NODE (gso_ip4_node) = {
872 .vector_size = sizeof (u32),
873 .format_trace = format_gso_trace,
874 .type = VLIB_NODE_TYPE_INTERNAL,
875 .n_errors = ARRAY_LEN(gso_error_strings),
876 .error_strings = gso_error_strings,
877 .n_next_nodes = GSO_N_NEXT,
879 [GSO_NEXT_DROP] = "error-drop",
884 VLIB_REGISTER_NODE (gso_ip6_node) = {
885 .vector_size = sizeof (u32),
886 .format_trace = format_gso_trace,
887 .type = VLIB_NODE_TYPE_INTERNAL,
888 .n_errors = ARRAY_LEN(gso_error_strings),
889 .error_strings = gso_error_strings,
890 .n_next_nodes = GSO_N_NEXT,
892 [GSO_NEXT_DROP] = "error-drop",
897 VNET_FEATURE_INIT (gso_l2_ip4_node, static) = {
898 .arc_name = "l2-output-ip4",
899 .node_name = "gso-l2-ip4",
900 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
903 VNET_FEATURE_INIT (gso_l2_ip6_node, static) = {
904 .arc_name = "l2-output-ip6",
905 .node_name = "gso-l2-ip6",
906 .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
909 VNET_FEATURE_INIT (gso_ip4_node, static) = {
910 .arc_name = "ip4-output",
911 .node_name = "gso-ip4",
912 .runs_before = VNET_FEATURES ("ipsec4-output-feature"),
915 VNET_FEATURE_INIT (gso_ip6_node, static) = {
916 .arc_name = "ip6-output",
917 .node_name = "gso-ip6",
918 .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
922 * fd.io coding-style-patch-verification: ON
925 * eval: (c-set-style "gnu")