Line data Source code
1 : /*
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:
6 : *
7 : * http://www.apache.org/licenses/LICENSE-2.0
8 : *
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.
14 : */
15 :
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>
27 :
28 : #define foreach_gso_error \
29 : _ (NO_BUFFERS, "no buffers to segment GSO") \
30 : _ (UNHANDLED_TYPE, "unhandled gso type")
31 :
32 : static char *gso_error_strings[] = {
33 : #define _(sym, string) string,
34 : foreach_gso_error
35 : #undef _
36 : };
37 :
38 : typedef enum
39 : {
40 : #define _(sym, str) GSO_ERROR_##sym,
41 : foreach_gso_error
42 : #undef _
43 : GSO_N_ERROR,
44 : } gso_error_t;
45 :
46 : typedef enum
47 : {
48 : GSO_NEXT_DROP,
49 : GSO_N_NEXT,
50 : } gso_next_t;
51 :
52 : typedef struct
53 : {
54 : u32 flags;
55 : u16 gso_size;
56 : u8 gso_l4_hdr_sz;
57 : generic_header_offset_t gho;
58 : } gso_trace_t;
59 :
60 : static u8 *
61 780 : format_gso_trace (u8 * s, va_list * args)
62 : {
63 780 : CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
64 780 : CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
65 780 : gso_trace_t *t = va_arg (*args, gso_trace_t *);
66 :
67 780 : if (t->flags & VNET_BUFFER_F_GSO)
68 : {
69 185 : s = format (s, "gso_sz %d gso_l4_hdr_sz %d\n%U",
70 185 : t->gso_size, t->gso_l4_hdr_sz, format_generic_header_offset,
71 : &t->gho);
72 : }
73 : else
74 : {
75 : s =
76 595 : format (s, "non-gso buffer\n%U", format_generic_header_offset,
77 : &t->gho);
78 : }
79 :
80 780 : return s;
81 : }
82 :
83 : static_always_inline u16
84 20 : tso_segment_ipip_tunnel_fixup (vlib_main_t * vm,
85 : vnet_interface_per_thread_data_t * ptd,
86 : vlib_buffer_t * sb0,
87 : generic_header_offset_t * gho)
88 : {
89 20 : u16 n_tx_bufs = vec_len (ptd->split_buffers);
90 20 : u16 i = 0, n_tx_bytes = 0;
91 :
92 920 : while (i < n_tx_bufs)
93 : {
94 900 : vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
95 :
96 900 : ip4_header_t *ip4 =
97 900 : (ip4_header_t *) (vlib_buffer_get_current (b0) +
98 900 : gho->outer_l3_hdr_offset);
99 900 : ip6_header_t *ip6 =
100 900 : (ip6_header_t *) (vlib_buffer_get_current (b0) +
101 900 : gho->outer_l3_hdr_offset);
102 :
103 900 : if (gho->gho_flags & GHO_F_OUTER_IP4)
104 : {
105 450 : ip4->length =
106 450 : clib_host_to_net_u16 (b0->current_length -
107 450 : gho->outer_l3_hdr_offset);
108 450 : ip4->checksum = ip4_header_checksum (ip4);
109 : }
110 450 : else if (gho->gho_flags & GHO_F_OUTER_IP6)
111 : {
112 450 : ip6->payload_length =
113 450 : clib_host_to_net_u16 (b0->current_length -
114 450 : gho->outer_l4_hdr_offset);
115 : }
116 :
117 900 : n_tx_bytes += gho->outer_hdr_sz;
118 900 : i++;
119 : }
120 20 : return n_tx_bytes;
121 : }
122 :
123 : static_always_inline void
124 900 : tso_segment_vxlan_tunnel_headers_fixup (vlib_main_t * vm, vlib_buffer_t * b,
125 : generic_header_offset_t * gho)
126 : {
127 900 : u8 proto = 0;
128 900 : ip4_header_t *ip4 = 0;
129 900 : ip6_header_t *ip6 = 0;
130 900 : udp_header_t *udp = 0;
131 :
132 900 : ip4 =
133 900 : (ip4_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
134 900 : ip6 =
135 900 : (ip6_header_t *) (vlib_buffer_get_current (b) + gho->outer_l3_hdr_offset);
136 900 : udp =
137 900 : (udp_header_t *) (vlib_buffer_get_current (b) + gho->outer_l4_hdr_offset);
138 :
139 900 : if (gho->gho_flags & GHO_F_OUTER_IP4)
140 : {
141 450 : proto = ip4->protocol;
142 450 : ip4->length =
143 450 : clib_host_to_net_u16 (b->current_length - gho->outer_l3_hdr_offset);
144 450 : ip4->checksum = ip4_header_checksum (ip4);
145 : }
146 450 : else if (gho->gho_flags & GHO_F_OUTER_IP6)
147 : {
148 450 : proto = ip6->protocol;
149 450 : ip6->payload_length =
150 450 : clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
151 : }
152 900 : if (proto == IP_PROTOCOL_UDP)
153 : {
154 : int bogus;
155 900 : udp->length =
156 900 : clib_host_to_net_u16 (b->current_length - gho->outer_l4_hdr_offset);
157 900 : udp->checksum = 0;
158 900 : if (gho->gho_flags & GHO_F_OUTER_IP6)
159 : {
160 450 : udp->checksum =
161 450 : ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
162 : }
163 450 : else if (gho->gho_flags & GHO_F_OUTER_IP4)
164 : {
165 450 : udp->checksum = ip4_tcp_udp_compute_checksum (vm, b, ip4);
166 : }
167 : /* FIXME: it should be OUTER_UDP_CKSUM */
168 900 : vnet_buffer_offload_flags_clear (b, VNET_BUFFER_OFFLOAD_F_UDP_CKSUM);
169 : }
170 900 : }
171 :
172 : static_always_inline u16
173 20 : tso_segment_vxlan_tunnel_fixup (vlib_main_t * vm,
174 : vnet_interface_per_thread_data_t * ptd,
175 : vlib_buffer_t * sb0,
176 : generic_header_offset_t * gho)
177 : {
178 20 : u16 n_tx_bufs = vec_len (ptd->split_buffers);
179 20 : u16 i = 0, n_tx_bytes = 0;
180 :
181 920 : while (i < n_tx_bufs)
182 : {
183 900 : vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[i]);
184 :
185 900 : tso_segment_vxlan_tunnel_headers_fixup (vm, b0, gho);
186 900 : n_tx_bytes += gho->outer_hdr_sz;
187 900 : i++;
188 : }
189 20 : return n_tx_bytes;
190 : }
191 :
192 : static_always_inline u16
193 0 : tso_alloc_tx_bufs (vlib_main_t * vm,
194 : vnet_interface_per_thread_data_t * ptd,
195 : vlib_buffer_t * b0, u32 n_bytes_b0, u16 l234_sz,
196 : u16 gso_size, u16 first_data_size,
197 : generic_header_offset_t * gho)
198 : {
199 : u16 n_alloc, size;
200 0 : u16 first_packet_length = l234_sz + first_data_size;
201 :
202 : /*
203 : * size is the amount of data per segmented buffer except the 1st
204 : * segmented buffer.
205 : * l2_hdr_offset is an offset == current_data of vlib_buffer_t.
206 : * l234_sz is hdr_sz from l2_hdr_offset.
207 : */
208 0 : size =
209 0 : clib_min (gso_size, vlib_buffer_get_default_data_size (vm) - l234_sz
210 : - gho->l2_hdr_offset);
211 :
212 : /*
213 : * First segmented buffer length is calculated separately.
214 : * As it may contain less data than gso_size (when gso_size is
215 : * greater than current_length of 1st buffer from GSO chained
216 : * buffers) and/or size calculated above.
217 : */
218 0 : u16 n_bufs = 1;
219 :
220 : /*
221 : * Total packet length minus first packet length including l234 header.
222 : * rounded-up division
223 : */
224 0 : ASSERT (n_bytes_b0 > first_packet_length);
225 0 : n_bufs += ((n_bytes_b0 - first_packet_length + (size - 1)) / size);
226 :
227 0 : vec_validate (ptd->split_buffers, n_bufs - 1);
228 :
229 0 : n_alloc = vlib_buffer_alloc (vm, ptd->split_buffers, n_bufs);
230 0 : if (n_alloc < n_bufs)
231 : {
232 0 : vlib_buffer_free (vm, ptd->split_buffers, n_alloc);
233 0 : return 0;
234 : }
235 0 : return n_alloc;
236 : }
237 :
238 : static_always_inline void
239 0 : tso_init_buf_from_template_base (vlib_buffer_t * nb0, vlib_buffer_t * b0,
240 : u32 flags, u16 length)
241 : {
242 : /* copying objects from cacheline 0 */
243 0 : nb0->current_data = b0->current_data;
244 0 : nb0->current_length = length;
245 0 : nb0->flags = VLIB_BUFFER_TOTAL_LENGTH_VALID | flags;
246 0 : nb0->flow_id = b0->flow_id;
247 0 : nb0->error = b0->error;
248 0 : nb0->current_config_index = b0->current_config_index;
249 0 : clib_memcpy_fast (&nb0->opaque, &b0->opaque, sizeof (nb0->opaque));
250 :
251 : /* copying objects from cacheline 1 */
252 0 : nb0->trace_handle = b0->trace_handle;
253 0 : nb0->total_length_not_including_first_buffer = 0;
254 :
255 : /* copying data */
256 0 : clib_memcpy_fast (vlib_buffer_get_current (nb0),
257 0 : vlib_buffer_get_current (b0), length);
258 0 : }
259 :
260 : static_always_inline void
261 0 : tso_init_buf_from_template (vlib_main_t * vm, vlib_buffer_t * nb0,
262 : vlib_buffer_t * b0, u16 template_data_sz,
263 : u16 gso_size, u8 ** p_dst_ptr, u16 * p_dst_left,
264 : u32 next_tcp_seq, u32 flags,
265 : generic_header_offset_t * gho)
266 : {
267 0 : tso_init_buf_from_template_base (nb0, b0, flags, template_data_sz);
268 :
269 0 : *p_dst_left =
270 0 : clib_min (gso_size,
271 : vlib_buffer_get_default_data_size (vm) - (template_data_sz +
272 : nb0->current_data));
273 0 : *p_dst_ptr = vlib_buffer_get_current (nb0) + template_data_sz;
274 :
275 0 : tcp_header_t *tcp =
276 0 : (tcp_header_t *) (vlib_buffer_get_current (nb0) + gho->l4_hdr_offset);
277 0 : tcp->seq_number = clib_host_to_net_u32 (next_tcp_seq);
278 0 : }
279 :
280 : static_always_inline void
281 0 : tso_fixup_segmented_buf (vlib_main_t * vm, vlib_buffer_t * b0, u8 tcp_flags,
282 : int is_l2, int is_ip6, generic_header_offset_t * gho)
283 : {
284 0 : ip4_header_t *ip4 =
285 0 : (ip4_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
286 0 : ip6_header_t *ip6 =
287 0 : (ip6_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
288 0 : tcp_header_t *tcp =
289 0 : (tcp_header_t *) (vlib_buffer_get_current (b0) + gho->l4_hdr_offset);
290 :
291 0 : tcp->flags = tcp_flags;
292 :
293 0 : if (is_ip6)
294 : {
295 0 : ip6->payload_length =
296 0 : clib_host_to_net_u16 (b0->current_length - gho->l4_hdr_offset);
297 0 : if (gho->gho_flags & GHO_F_TCP)
298 : {
299 0 : int bogus = 0;
300 0 : tcp->checksum = 0;
301 0 : tcp->checksum =
302 0 : ip6_tcp_udp_icmp_compute_checksum (vm, b0, ip6, &bogus);
303 0 : vnet_buffer_offload_flags_clear (b0,
304 : VNET_BUFFER_OFFLOAD_F_TCP_CKSUM);
305 : }
306 : }
307 : else
308 : {
309 0 : ip4->length =
310 0 : clib_host_to_net_u16 (b0->current_length - gho->l3_hdr_offset);
311 0 : if (gho->gho_flags & GHO_F_IP4)
312 0 : ip4->checksum = ip4_header_checksum (ip4);
313 0 : if (gho->gho_flags & GHO_F_TCP)
314 : {
315 0 : tcp->checksum = 0;
316 0 : tcp->checksum = ip4_tcp_udp_compute_checksum (vm, b0, ip4);
317 : }
318 0 : vnet_buffer_offload_flags_clear (b0, (VNET_BUFFER_OFFLOAD_F_IP_CKSUM |
319 : VNET_BUFFER_OFFLOAD_F_TCP_CKSUM));
320 : }
321 :
322 0 : if (!is_l2 && ((gho->gho_flags & GHO_F_TUNNEL) == 0))
323 : {
324 0 : u32 adj_index0 = vnet_buffer (b0)->ip.adj_index[VLIB_TX];
325 :
326 0 : ip_adjacency_t *adj0 = adj_get (adj_index0);
327 :
328 0 : if (adj0->lookup_next_index == IP_LOOKUP_NEXT_MIDCHAIN &&
329 0 : adj0->sub_type.midchain.fixup_func)
330 : /* calls e.g. ipip44_fixup */
331 0 : adj0->sub_type.midchain.fixup_func
332 : (vm, adj0, b0, adj0->sub_type.midchain.fixup_data);
333 : }
334 0 : }
335 :
336 : /**
337 : * Allocate the necessary number of ptd->split_buffers,
338 : * and segment the possibly chained buffer(s) from b0 into
339 : * there.
340 : *
341 : * Return the cumulative number of bytes sent or zero
342 : * if allocation failed.
343 : */
344 :
345 : static_always_inline u32
346 0 : tso_segment_buffer (vlib_main_t * vm, vnet_interface_per_thread_data_t * ptd,
347 : u32 sbi0, vlib_buffer_t * sb0,
348 : generic_header_offset_t * gho, u32 n_bytes_b0, int is_l2,
349 : int is_ip6)
350 : {
351 0 : u32 n_tx_bytes = 0;
352 0 : u16 gso_size = vnet_buffer2 (sb0)->gso_size;
353 :
354 0 : u8 save_tcp_flags = 0;
355 0 : u8 tcp_flags_no_fin_psh = 0;
356 0 : u32 next_tcp_seq = 0;
357 :
358 0 : tcp_header_t *tcp =
359 0 : (tcp_header_t *) (vlib_buffer_get_current (sb0) + gho->l4_hdr_offset);
360 0 : next_tcp_seq = clib_net_to_host_u32 (tcp->seq_number);
361 : /* store original flags for last packet and reset FIN and PSH */
362 0 : save_tcp_flags = tcp->flags;
363 0 : tcp_flags_no_fin_psh = tcp->flags & ~(TCP_FLAG_FIN | TCP_FLAG_PSH);
364 0 : tcp->checksum = 0;
365 :
366 0 : u32 default_bflags =
367 0 : sb0->flags & ~(VNET_BUFFER_F_GSO | VLIB_BUFFER_NEXT_PRESENT);
368 0 : u16 l234_sz = gho->hdr_sz;
369 0 : int first_data_size = clib_min (gso_size, sb0->current_length - l234_sz);
370 0 : next_tcp_seq += first_data_size;
371 :
372 0 : if (PREDICT_FALSE
373 : (!tso_alloc_tx_bufs
374 : (vm, ptd, sb0, n_bytes_b0, l234_sz, gso_size, first_data_size, gho)))
375 0 : return 0;
376 :
377 0 : vlib_buffer_t *b0 = vlib_get_buffer (vm, ptd->split_buffers[0]);
378 0 : tso_init_buf_from_template_base (b0, sb0, default_bflags,
379 0 : l234_sz + first_data_size);
380 :
381 0 : u32 total_src_left = n_bytes_b0 - l234_sz - first_data_size;
382 0 : if (total_src_left)
383 : {
384 : /* Need to copy more segments */
385 : u8 *src_ptr, *dst_ptr;
386 : u16 src_left, dst_left;
387 : /* current source buffer */
388 0 : vlib_buffer_t *csb0 = sb0;
389 0 : u32 csbi0 = sbi0;
390 : /* current dest buffer */
391 : vlib_buffer_t *cdb0;
392 0 : u16 dbi = 1; /* the buffer [0] is b0 */
393 :
394 0 : src_ptr = vlib_buffer_get_current (sb0) + l234_sz + first_data_size;
395 0 : src_left = sb0->current_length - l234_sz - first_data_size;
396 :
397 0 : tso_fixup_segmented_buf (vm, b0, tcp_flags_no_fin_psh, is_l2, is_ip6,
398 : gho);
399 :
400 : /* grab a second buffer and prepare the loop */
401 0 : ASSERT (dbi < vec_len (ptd->split_buffers));
402 0 : cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
403 0 : tso_init_buf_from_template (vm, cdb0, b0, l234_sz, gso_size, &dst_ptr,
404 : &dst_left, next_tcp_seq, default_bflags,
405 : gho);
406 :
407 : /* an arbitrary large number to catch the runaway loops */
408 0 : int nloops = 2000;
409 0 : while (total_src_left)
410 : {
411 0 : if (nloops-- <= 0)
412 0 : clib_panic ("infinite loop detected");
413 0 : u16 bytes_to_copy = clib_min (src_left, dst_left);
414 :
415 0 : clib_memcpy_fast (dst_ptr, src_ptr, bytes_to_copy);
416 :
417 0 : src_left -= bytes_to_copy;
418 0 : src_ptr += bytes_to_copy;
419 0 : total_src_left -= bytes_to_copy;
420 0 : dst_left -= bytes_to_copy;
421 0 : dst_ptr += bytes_to_copy;
422 0 : next_tcp_seq += bytes_to_copy;
423 0 : cdb0->current_length += bytes_to_copy;
424 :
425 0 : if (0 == src_left)
426 : {
427 0 : int has_next = (csb0->flags & VLIB_BUFFER_NEXT_PRESENT);
428 0 : u32 next_bi = csb0->next_buffer;
429 :
430 : /* init src to the next buffer in chain */
431 0 : if (has_next)
432 : {
433 0 : csbi0 = next_bi;
434 0 : csb0 = vlib_get_buffer (vm, csbi0);
435 0 : src_left = csb0->current_length;
436 0 : src_ptr = vlib_buffer_get_current (csb0);
437 : }
438 : else
439 : {
440 0 : ASSERT (total_src_left == 0);
441 0 : break;
442 : }
443 : }
444 0 : if (0 == dst_left && total_src_left)
445 : {
446 0 : n_tx_bytes += cdb0->current_length;
447 0 : tso_fixup_segmented_buf (vm, cdb0, tcp_flags_no_fin_psh, is_l2,
448 : is_ip6, gho);
449 0 : ASSERT (dbi < vec_len (ptd->split_buffers));
450 0 : cdb0 = vlib_get_buffer (vm, ptd->split_buffers[dbi++]);
451 0 : tso_init_buf_from_template (vm, cdb0, b0, l234_sz,
452 : gso_size, &dst_ptr, &dst_left,
453 : next_tcp_seq, default_bflags, gho);
454 : }
455 : }
456 :
457 0 : tso_fixup_segmented_buf (vm, cdb0, save_tcp_flags, is_l2, is_ip6, gho);
458 :
459 0 : n_tx_bytes += cdb0->current_length;
460 : }
461 0 : n_tx_bytes += b0->current_length;
462 0 : return n_tx_bytes;
463 : }
464 :
465 : __clib_unused u32
466 0 : gso_segment_buffer (vlib_main_t *vm, vnet_interface_per_thread_data_t *ptd,
467 : u32 bi, vlib_buffer_t *b, generic_header_offset_t *gho,
468 : u32 n_bytes_b, u8 is_l2, u8 is_ip6)
469 : {
470 :
471 0 : return tso_segment_buffer (vm, ptd, bi, b, gho, n_bytes_b, is_l2, is_ip6);
472 : }
473 :
474 : static_always_inline void
475 0 : drop_one_buffer_and_count (vlib_main_t * vm, vnet_main_t * vnm,
476 : vlib_node_runtime_t * node, u32 * pbi0,
477 : u32 sw_if_index, u32 drop_error_code)
478 : {
479 0 : u32 thread_index = vm->thread_index;
480 :
481 : vlib_simple_counter_main_t *cm;
482 0 : cm =
483 0 : vec_elt_at_index (vnm->interface_main.sw_if_counters,
484 : VNET_INTERFACE_COUNTER_TX_ERROR);
485 0 : vlib_increment_simple_counter (cm, thread_index, sw_if_index, 1);
486 :
487 0 : vlib_error_drop_buffers (vm, node, pbi0,
488 : /* buffer stride */ 1,
489 : /* n_buffers */ 1, GSO_NEXT_DROP, node->node_index,
490 : drop_error_code);
491 0 : }
492 :
493 : static_always_inline uword
494 913293 : vnet_gso_node_inline (vlib_main_t * vm,
495 : vlib_node_runtime_t * node,
496 : vlib_frame_t * frame,
497 : vnet_main_t * vnm,
498 : vnet_hw_interface_t * hi,
499 : int is_l2, int is_ip4, int is_ip6, int do_segmentation)
500 : {
501 : u32 *to_next;
502 913293 : u32 next_index = node->cached_next_index;
503 913293 : u32 *from = vlib_frame_vector_args (frame);
504 913293 : u32 n_left_from = frame->n_vectors;
505 913293 : u32 *from_end = from + n_left_from;
506 913293 : u32 thread_index = vm->thread_index;
507 913293 : vnet_interface_main_t *im = &vnm->interface_main;
508 913293 : vnet_interface_per_thread_data_t *ptd =
509 913293 : vec_elt_at_index (im->per_thread_data, thread_index);
510 913293 : vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b = bufs;
511 :
512 913293 : vlib_get_buffers (vm, from, b, n_left_from);
513 :
514 1826640 : while (n_left_from > 0)
515 : {
516 : u32 n_left_to_next;
517 :
518 913351 : vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
519 :
520 913351 : if (!do_segmentation)
521 50 : while (from + 8 <= from_end && n_left_to_next >= 4)
522 : {
523 : u32 bi0, bi1, bi2, bi3;
524 : u32 next0, next1, next2, next3;
525 : u32 swif0, swif1, swif2, swif3;
526 : gso_trace_t *t0, *t1, *t2, *t3;
527 : vnet_hw_interface_t *hi0, *hi1, *hi2, *hi3;
528 :
529 : /* Prefetch next iteration. */
530 48 : vlib_prefetch_buffer_header (b[4], LOAD);
531 48 : vlib_prefetch_buffer_header (b[5], LOAD);
532 48 : vlib_prefetch_buffer_header (b[6], LOAD);
533 48 : vlib_prefetch_buffer_header (b[7], LOAD);
534 :
535 48 : bi0 = from[0];
536 48 : bi1 = from[1];
537 48 : bi2 = from[2];
538 48 : bi3 = from[3];
539 48 : to_next[0] = bi0;
540 48 : to_next[1] = bi1;
541 48 : to_next[2] = bi2;
542 48 : to_next[3] = bi3;
543 :
544 48 : swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
545 48 : swif1 = vnet_buffer (b[1])->sw_if_index[VLIB_TX];
546 48 : swif2 = vnet_buffer (b[2])->sw_if_index[VLIB_TX];
547 48 : swif3 = vnet_buffer (b[3])->sw_if_index[VLIB_TX];
548 :
549 48 : if (PREDICT_FALSE (hi->sw_if_index != swif0))
550 : {
551 0 : hi0 = vnet_get_sup_hw_interface (vnm, swif0);
552 0 : if ((hi0->caps & VNET_HW_IF_CAP_TCP_GSO) == 0 &&
553 0 : (b[0]->flags & VNET_BUFFER_F_GSO))
554 0 : break;
555 : }
556 48 : if (PREDICT_FALSE (hi->sw_if_index != swif1))
557 : {
558 0 : hi1 = vnet_get_sup_hw_interface (vnm, swif1);
559 0 : if (!(hi1->caps & VNET_HW_IF_CAP_TCP_GSO) &&
560 0 : (b[1]->flags & VNET_BUFFER_F_GSO))
561 0 : break;
562 : }
563 48 : if (PREDICT_FALSE (hi->sw_if_index != swif2))
564 : {
565 0 : hi2 = vnet_get_sup_hw_interface (vnm, swif2);
566 0 : if ((hi2->caps & VNET_HW_IF_CAP_TCP_GSO) == 0 &&
567 0 : (b[2]->flags & VNET_BUFFER_F_GSO))
568 0 : break;
569 : }
570 48 : if (PREDICT_FALSE (hi->sw_if_index != swif3))
571 : {
572 0 : hi3 = vnet_get_sup_hw_interface (vnm, swif3);
573 0 : if (!(hi3->caps & VNET_HW_IF_CAP_TCP_GSO) &&
574 0 : (b[3]->flags & VNET_BUFFER_F_GSO))
575 0 : break;
576 : }
577 :
578 48 : if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
579 : {
580 48 : t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
581 48 : t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
582 48 : t0->gso_size = vnet_buffer2 (b[0])->gso_size;
583 48 : t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
584 48 : clib_memset (&t0->gho, 0, sizeof (t0->gho));
585 48 : vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
586 : is_ip4, is_ip6);
587 : }
588 48 : if (b[1]->flags & VLIB_BUFFER_IS_TRACED)
589 : {
590 48 : t1 = vlib_add_trace (vm, node, b[1], sizeof (t1[0]));
591 48 : t1->flags = b[1]->flags & VNET_BUFFER_F_GSO;
592 48 : t1->gso_size = vnet_buffer2 (b[1])->gso_size;
593 48 : t1->gso_l4_hdr_sz = vnet_buffer2 (b[1])->gso_l4_hdr_sz;
594 48 : clib_memset (&t1->gho, 0, sizeof (t1->gho));
595 48 : vnet_generic_header_offset_parser (b[1], &t1->gho, is_l2,
596 : is_ip4, is_ip6);
597 : }
598 48 : if (b[2]->flags & VLIB_BUFFER_IS_TRACED)
599 : {
600 48 : t2 = vlib_add_trace (vm, node, b[2], sizeof (t2[0]));
601 48 : t2->flags = b[2]->flags & VNET_BUFFER_F_GSO;
602 48 : t2->gso_size = vnet_buffer2 (b[2])->gso_size;
603 48 : t2->gso_l4_hdr_sz = vnet_buffer2 (b[2])->gso_l4_hdr_sz;
604 48 : clib_memset (&t2->gho, 0, sizeof (t2->gho));
605 48 : vnet_generic_header_offset_parser (b[2], &t2->gho, is_l2,
606 : is_ip4, is_ip6);
607 : }
608 48 : if (b[3]->flags & VLIB_BUFFER_IS_TRACED)
609 : {
610 48 : t3 = vlib_add_trace (vm, node, b[3], sizeof (t3[0]));
611 48 : t3->flags = b[3]->flags & VNET_BUFFER_F_GSO;
612 48 : t3->gso_size = vnet_buffer2 (b[3])->gso_size;
613 48 : t3->gso_l4_hdr_sz = vnet_buffer2 (b[3])->gso_l4_hdr_sz;
614 48 : clib_memset (&t3->gho, 0, sizeof (t3->gho));
615 48 : vnet_generic_header_offset_parser (b[3], &t3->gho, is_l2,
616 : is_ip4, is_ip6);
617 : }
618 :
619 48 : from += 4;
620 48 : to_next += 4;
621 48 : n_left_to_next -= 4;
622 48 : n_left_from -= 4;
623 :
624 48 : next0 = next1 = 0;
625 48 : next2 = next3 = 0;
626 48 : vnet_feature_next (&next0, b[0]);
627 48 : vnet_feature_next (&next1, b[1]);
628 48 : vnet_feature_next (&next2, b[2]);
629 48 : vnet_feature_next (&next3, b[3]);
630 48 : vlib_validate_buffer_enqueue_x4 (vm, node, next_index, to_next,
631 : n_left_to_next, bi0, bi1, bi2,
632 : bi3, next0, next1, next2, next3);
633 48 : b += 4;
634 : }
635 :
636 36014400 : while (from + 1 <= from_end && n_left_to_next > 0)
637 : {
638 : u32 bi0, swif0;
639 : gso_trace_t *t0;
640 : vnet_hw_interface_t *hi0;
641 35101000 : u32 next0 = 0;
642 35101000 : u32 do_segmentation0 = 0;
643 :
644 35101000 : swif0 = vnet_buffer (b[0])->sw_if_index[VLIB_TX];
645 35101000 : if (PREDICT_FALSE (hi->sw_if_index != swif0))
646 : {
647 5488400 : hi0 = vnet_get_sup_hw_interface (vnm, swif0);
648 5488400 : if ((hi0->caps & VNET_HW_IF_CAP_TCP_GSO) == 0 &&
649 5488400 : (b[0]->flags & VNET_BUFFER_F_GSO))
650 0 : do_segmentation0 = 1;
651 : }
652 : else
653 29612600 : do_segmentation0 = do_segmentation;
654 :
655 : /* speculatively enqueue b0 to the current next frame */
656 35101000 : to_next[0] = bi0 = from[0];
657 35101000 : to_next += 1;
658 35101000 : n_left_to_next -= 1;
659 35101000 : from += 1;
660 35101000 : n_left_from -= 1;
661 :
662 35101000 : if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
663 : {
664 672 : t0 = vlib_add_trace (vm, node, b[0], sizeof (t0[0]));
665 672 : t0->flags = b[0]->flags & VNET_BUFFER_F_GSO;
666 672 : t0->gso_size = vnet_buffer2 (b[0])->gso_size;
667 672 : t0->gso_l4_hdr_sz = vnet_buffer2 (b[0])->gso_l4_hdr_sz;
668 672 : clib_memset (&t0->gho, 0, sizeof (t0->gho));
669 672 : vnet_generic_header_offset_parser (b[0], &t0->gho, is_l2,
670 : is_ip4, is_ip6);
671 : }
672 :
673 35101000 : if (do_segmentation0)
674 : {
675 29612600 : if (PREDICT_FALSE (b[0]->flags & VNET_BUFFER_F_GSO))
676 : {
677 : /*
678 : * Undo the enqueue of the b0 - it is not going anywhere,
679 : * and will be freed either after it's segmented or
680 : * when dropped, if there is no buffers to segment into.
681 : */
682 174694 : to_next -= 1;
683 174694 : n_left_to_next += 1;
684 : /* undo the counting. */
685 174694 : generic_header_offset_t gho = { 0 };
686 174694 : u32 n_tx_bytes = 0;
687 174694 : u32 inner_is_ip6 = is_ip6;
688 :
689 174694 : vnet_generic_header_offset_parser (b[0], &gho, is_l2,
690 : is_ip4, is_ip6);
691 :
692 174694 : if (PREDICT_FALSE (gho.gho_flags & GHO_F_TUNNEL))
693 : {
694 40 : if (PREDICT_FALSE
695 : (gho.gho_flags & (GHO_F_GRE_TUNNEL |
696 : GHO_F_GENEVE_TUNNEL)))
697 : {
698 : /* not supported yet */
699 0 : drop_one_buffer_and_count (vm, vnm, node, from - 1,
700 : hi->sw_if_index,
701 : GSO_ERROR_UNHANDLED_TYPE);
702 0 : b += 1;
703 0 : continue;
704 : }
705 :
706 40 : inner_is_ip6 = (gho.gho_flags & GHO_F_IP6) != 0;
707 : }
708 :
709 174694 : n_tx_bytes = gso_segment_buffer_inline (vm, ptd, b[0], &gho,
710 : is_l2, inner_is_ip6);
711 :
712 174694 : if (PREDICT_FALSE (n_tx_bytes == 0))
713 : {
714 0 : drop_one_buffer_and_count (vm, vnm, node, from - 1,
715 : hi->sw_if_index,
716 : GSO_ERROR_NO_BUFFERS);
717 0 : b += 1;
718 0 : continue;
719 : }
720 :
721 :
722 174694 : if (PREDICT_FALSE (gho.gho_flags & GHO_F_VXLAN_TUNNEL))
723 : {
724 20 : n_tx_bytes +=
725 20 : tso_segment_vxlan_tunnel_fixup (vm, ptd, b[0], &gho);
726 : }
727 : else
728 174674 : if (PREDICT_FALSE
729 : (gho.gho_flags & (GHO_F_IPIP_TUNNEL |
730 : GHO_F_IPIP6_TUNNEL)))
731 : {
732 20 : n_tx_bytes +=
733 20 : tso_segment_ipip_tunnel_fixup (vm, ptd, b[0], &gho);
734 : }
735 :
736 174694 : u16 n_tx_bufs = vec_len (ptd->split_buffers);
737 174694 : u32 *from_seg = ptd->split_buffers;
738 :
739 349633 : while (n_tx_bufs > 0)
740 : {
741 : u32 sbi0;
742 : vlib_buffer_t *sb0;
743 5587080 : while (n_tx_bufs > 0 && n_left_to_next > 0)
744 : {
745 5412140 : sbi0 = to_next[0] = from_seg[0];
746 5412140 : sb0 = vlib_get_buffer (vm, sbi0);
747 5412140 : vnet_buffer_offload_flags_clear (sb0, 0x7F);
748 5412140 : ASSERT (sb0->current_length > 0);
749 5412140 : to_next += 1;
750 5412140 : from_seg += 1;
751 5412140 : n_left_to_next -= 1;
752 5412140 : n_tx_bufs -= 1;
753 5412140 : next0 = 0;
754 5412140 : vnet_feature_next (&next0, sb0);
755 5412140 : vlib_validate_buffer_enqueue_x1 (vm, node,
756 : next_index,
757 : to_next,
758 : n_left_to_next,
759 : sbi0, next0);
760 : }
761 174939 : vlib_put_next_frame (vm, node, next_index,
762 : n_left_to_next);
763 174939 : if (n_tx_bufs > 0)
764 245 : vlib_get_next_frame (vm, node, next_index,
765 : to_next, n_left_to_next);
766 : }
767 : /* The buffers were enqueued. Reset the length */
768 174694 : vec_set_len (ptd->split_buffers, 0);
769 : /* Free the now segmented buffer */
770 174694 : vlib_buffer_free_one (vm, bi0);
771 174694 : b += 1;
772 174694 : continue;
773 : }
774 : }
775 :
776 34926300 : vnet_feature_next (&next0, b[0]);
777 34926300 : vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next,
778 : n_left_to_next, bi0, next0);
779 34926300 : b += 1;
780 : }
781 913351 : vlib_put_next_frame (vm, node, next_index, n_left_to_next);
782 : }
783 :
784 913293 : return frame->n_vectors;
785 : }
786 :
787 : static_always_inline uword
788 913293 : 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)
791 : {
792 913293 : vnet_main_t *vnm = vnet_get_main ();
793 : vnet_hw_interface_t *hi;
794 :
795 913293 : if (frame->n_vectors > 0)
796 : {
797 913293 : u32 *from = vlib_frame_vector_args (frame);
798 913293 : vlib_buffer_t *b = vlib_get_buffer (vm, from[0]);
799 913293 : hi = vnet_get_sup_hw_interface (vnm,
800 913293 : vnet_buffer (b)->sw_if_index[VLIB_TX]);
801 :
802 913293 : if (hi->caps & (VNET_HW_IF_CAP_TCP_GSO | VNET_HW_IF_CAP_VXLAN_TNL_GSO))
803 2 : return vnet_gso_node_inline (vm, node, frame, vnm, hi,
804 : is_l2, is_ip4, is_ip6,
805 : /* do_segmentation */ 0);
806 : else
807 913291 : return vnet_gso_node_inline (vm, node, frame, vnm, hi,
808 : is_l2, is_ip4, is_ip6,
809 : /* do_segmentation */ 1);
810 : }
811 0 : return 0;
812 : }
813 :
814 324878 : VLIB_NODE_FN (gso_l2_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
815 : vlib_frame_t * frame)
816 : {
817 324303 : return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 1 /* ip4 */ ,
818 : 0 /* ip6 */ );
819 : }
820 :
821 287794 : VLIB_NODE_FN (gso_l2_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
822 : vlib_frame_t * frame)
823 : {
824 287219 : return vnet_gso_inline (vm, node, frame, 1 /* l2 */ , 0 /* ip4 */ ,
825 : 1 /* ip6 */ );
826 : }
827 :
828 163395 : VLIB_NODE_FN (gso_ip4_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
829 : vlib_frame_t * frame)
830 : {
831 162820 : return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 1 /* ip4 */ ,
832 : 0 /* ip6 */ );
833 : }
834 :
835 139526 : VLIB_NODE_FN (gso_ip6_node) (vlib_main_t * vm, vlib_node_runtime_t * node,
836 : vlib_frame_t * frame)
837 : {
838 138951 : return vnet_gso_inline (vm, node, frame, 0 /* l2 */ , 0 /* ip4 */ ,
839 : 1 /* ip6 */ );
840 : }
841 :
842 : /* *INDENT-OFF* */
843 :
844 183788 : VLIB_REGISTER_NODE (gso_l2_ip4_node) = {
845 : .vector_size = sizeof (u32),
846 : .format_trace = format_gso_trace,
847 : .type = VLIB_NODE_TYPE_INTERNAL,
848 : .n_errors = ARRAY_LEN(gso_error_strings),
849 : .error_strings = gso_error_strings,
850 : .n_next_nodes = GSO_N_NEXT,
851 : .next_nodes = {
852 : [GSO_NEXT_DROP] = "error-drop",
853 : },
854 : .name = "gso-l2-ip4",
855 : };
856 :
857 183788 : VLIB_REGISTER_NODE (gso_l2_ip6_node) = {
858 : .vector_size = sizeof (u32),
859 : .format_trace = format_gso_trace,
860 : .type = VLIB_NODE_TYPE_INTERNAL,
861 : .n_errors = ARRAY_LEN(gso_error_strings),
862 : .error_strings = gso_error_strings,
863 : .n_next_nodes = GSO_N_NEXT,
864 : .next_nodes = {
865 : [GSO_NEXT_DROP] = "error-drop",
866 : },
867 : .name = "gso-l2-ip6",
868 : };
869 :
870 183788 : VLIB_REGISTER_NODE (gso_ip4_node) = {
871 : .vector_size = sizeof (u32),
872 : .format_trace = format_gso_trace,
873 : .type = VLIB_NODE_TYPE_INTERNAL,
874 : .n_errors = ARRAY_LEN(gso_error_strings),
875 : .error_strings = gso_error_strings,
876 : .n_next_nodes = GSO_N_NEXT,
877 : .next_nodes = {
878 : [GSO_NEXT_DROP] = "error-drop",
879 : },
880 : .name = "gso-ip4",
881 : };
882 :
883 183788 : VLIB_REGISTER_NODE (gso_ip6_node) = {
884 : .vector_size = sizeof (u32),
885 : .format_trace = format_gso_trace,
886 : .type = VLIB_NODE_TYPE_INTERNAL,
887 : .n_errors = ARRAY_LEN(gso_error_strings),
888 : .error_strings = gso_error_strings,
889 : .n_next_nodes = GSO_N_NEXT,
890 : .next_nodes = {
891 : [GSO_NEXT_DROP] = "error-drop",
892 : },
893 : .name = "gso-ip6",
894 : };
895 :
896 76635 : VNET_FEATURE_INIT (gso_l2_ip4_node, static) = {
897 : .arc_name = "l2-output-ip4",
898 : .node_name = "gso-l2-ip4",
899 : .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
900 : };
901 :
902 76635 : VNET_FEATURE_INIT (gso_l2_ip6_node, static) = {
903 : .arc_name = "l2-output-ip6",
904 : .node_name = "gso-l2-ip6",
905 : .runs_before = VNET_FEATURES ("l2-output-feat-arc-end"),
906 : };
907 :
908 76635 : VNET_FEATURE_INIT (gso_ip4_node, static) = {
909 : .arc_name = "ip4-output",
910 : .node_name = "gso-ip4",
911 : .runs_before = VNET_FEATURES ("ipsec4-output-feature"),
912 : };
913 :
914 76635 : VNET_FEATURE_INIT (gso_ip6_node, static) = {
915 : .arc_name = "ip6-output",
916 : .node_name = "gso-ip6",
917 : .runs_before = VNET_FEATURES ("ipsec6-output-feature"),
918 : };
919 :
920 : /*
921 : * fd.io coding-style-patch-verification: ON
922 : *
923 : * Local Variables:
924 : * eval: (c-set-style "gnu")
925 : * End:
926 : */
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