2 * Copyright (c) 2017 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.
18 * @brief IPv4 Shallow Virtual Reassembly.
20 * This file contains the source code for IPv4 Shallow Virtual reassembly.
23 #include <vppinfra/vec.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vnet/ip/ip4_to_ip6.h>
27 #include <vppinfra/fifo.h>
28 #include <vppinfra/bihash_16_8.h>
29 #include <vnet/ip/reass/ip4_sv_reass.h>
31 #define MSEC_PER_SEC 1000
32 #define IP4_SV_REASS_TIMEOUT_DEFAULT_MS 100
33 #define IP4_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS 10000 // 10 seconds default
34 #define IP4_SV_REASS_MAX_REASSEMBLIES_DEFAULT 1024
35 #define IP4_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT 3
36 #define IP4_SV_REASS_HT_LOAD_FACTOR (0.75)
41 IP4_SV_REASS_RC_TOO_MANY_FRAGMENTS,
42 IP4_SV_REASS_RC_UNSUPP_IP_PROTO,
79 clib_bihash_kv_16_8_t kv;
85 ip4_sv_reass_key_t key;
86 // time when last packet was received
88 // internal id of this reassembly
90 // trace operation counter
92 // minimum fragment length for this reassembly - used to estimate MTU
93 u16 min_fragment_length;
94 // buffer indexes of buffers in this reassembly in chronological order -
95 // including overlaps and duplicate fragments
97 // set to true when this reassembly is completed
101 u8 icmp_type_or_tcp_flags;
116 ip4_sv_reass_t *pool;
119 clib_spinlock_t lock;
124 } ip4_sv_reass_per_thread_t;
131 u32 expire_walk_interval_ms;
132 // maximum number of fragments in one reassembly
134 // maximum number of reassemblies
138 clib_bihash_16_8_t hash;
140 ip4_sv_reass_per_thread_t *per_thread_data;
143 vlib_main_t *vlib_main;
144 vnet_main_t *vnet_main;
146 // node index of ip4-drop node
148 u32 ip4_sv_reass_expire_node_idx;
150 /** Worker handoff */
152 u32 fq_feature_index;
154 // reference count for enabling/disabling feature - per interface
155 u32 *feature_use_refcount_per_intf;
157 // reference count for enabling/disabling feature - per interface
158 u32 *output_feature_use_refcount_per_intf;
160 } ip4_sv_reass_main_t;
162 extern ip4_sv_reass_main_t ip4_sv_reass_main;
164 #ifndef CLIB_MARCH_VARIANT
165 ip4_sv_reass_main_t ip4_sv_reass_main;
166 #endif /* CLIB_MARCH_VARIANT */
170 IP4_SV_REASSEMBLY_NEXT_INPUT,
171 IP4_SV_REASSEMBLY_NEXT_DROP,
172 IP4_SV_REASSEMBLY_NEXT_HANDOFF,
173 IP4_SV_REASSEMBLY_N_NEXT,
174 } ip4_sv_reass_next_t;
178 REASS_FRAGMENT_CACHE,
180 REASS_FRAGMENT_FORWARD,
182 } ip4_sv_reass_trace_operation_e;
186 ip4_sv_reass_trace_operation_e action;
192 int l4_layer_truncated;
193 } ip4_sv_reass_trace_t;
195 extern vlib_node_registration_t ip4_sv_reass_node;
196 extern vlib_node_registration_t ip4_sv_reass_node_feature;
199 format_ip4_sv_reass_trace (u8 * s, va_list * args)
201 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
202 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
203 ip4_sv_reass_trace_t *t = va_arg (*args, ip4_sv_reass_trace_t *);
204 if (REASS_PASSTHROUGH != t->action)
206 s = format (s, "reass id: %u, op id: %u ", t->reass_id, t->op_id);
210 case REASS_FRAGMENT_CACHE:
211 s = format (s, "[cached]");
215 format (s, "[finish, ip proto=%u, src_port=%u, dst_port=%u]",
216 t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
217 clib_net_to_host_u16 (t->l4_dst_port));
219 case REASS_FRAGMENT_FORWARD:
221 format (s, "[forward, ip proto=%u, src_port=%u, dst_port=%u]",
222 t->ip_proto, clib_net_to_host_u16 (t->l4_src_port),
223 clib_net_to_host_u16 (t->l4_dst_port));
225 case REASS_PASSTHROUGH:
226 s = format (s, "[not-fragmented]");
229 if (t->l4_layer_truncated)
231 s = format (s, " [l4-layer-truncated]");
237 ip4_sv_reass_add_trace (vlib_main_t *vm, vlib_node_runtime_t *node,
238 ip4_sv_reass_t *reass, u32 bi,
239 ip4_sv_reass_trace_operation_e action, u32 ip_proto,
240 u16 l4_src_port, u16 l4_dst_port,
241 int l4_layer_truncated)
243 vlib_buffer_t *b = vlib_get_buffer (vm, bi);
244 if (pool_is_free_index
245 (vm->trace_main.trace_buffer_pool, vlib_buffer_get_trace_index (b)))
247 // this buffer's trace is gone
248 b->flags &= ~VLIB_BUFFER_IS_TRACED;
251 ip4_sv_reass_trace_t *t = vlib_add_trace (vm, node, b, sizeof (t[0]));
254 t->reass_id = reass->id;
255 t->op_id = reass->trace_op_counter;
256 ++reass->trace_op_counter;
259 t->ip_proto = ip_proto;
260 t->l4_src_port = l4_src_port;
261 t->l4_dst_port = l4_dst_port;
262 t->l4_layer_truncated = l4_layer_truncated;
265 s = format (s, "%U", format_ip4_sv_reass_trace, NULL, NULL, t);
266 printf ("%.*s\n", vec_len (s), s);
268 vec_reset_length (s);
274 ip4_sv_reass_free (vlib_main_t * vm, ip4_sv_reass_main_t * rm,
275 ip4_sv_reass_per_thread_t * rt, ip4_sv_reass_t * reass)
277 clib_bihash_kv_16_8_t kv;
278 kv.key[0] = reass->key.as_u64[0];
279 kv.key[1] = reass->key.as_u64[1];
280 clib_bihash_add_del_16_8 (&rm->hash, &kv, 0);
281 vlib_buffer_free (vm, reass->cached_buffers,
282 vec_len (reass->cached_buffers));
283 vec_free (reass->cached_buffers);
284 reass->cached_buffers = NULL;
285 if (~0 != reass->lru_prev)
287 ip4_sv_reass_t *lru_prev =
288 pool_elt_at_index (rt->pool, reass->lru_prev);
289 lru_prev->lru_next = reass->lru_next;
291 if (~0 != reass->lru_next)
293 ip4_sv_reass_t *lru_next =
294 pool_elt_at_index (rt->pool, reass->lru_next);
295 lru_next->lru_prev = reass->lru_prev;
297 if (rt->lru_first == reass - rt->pool)
299 rt->lru_first = reass->lru_next;
301 if (rt->lru_last == reass - rt->pool)
303 rt->lru_last = reass->lru_prev;
305 pool_put (rt->pool, reass);
310 ip4_sv_reass_init (ip4_sv_reass_t * reass)
312 reass->cached_buffers = NULL;
313 reass->is_complete = false;
316 always_inline ip4_sv_reass_t *
317 ip4_sv_reass_find_or_create (vlib_main_t * vm, ip4_sv_reass_main_t * rm,
318 ip4_sv_reass_per_thread_t * rt,
319 ip4_sv_reass_kv_t * kv, u8 * do_handoff)
321 ip4_sv_reass_t *reass = NULL;
322 f64 now = vlib_time_now (vm);
324 if (!clib_bihash_search_16_8 (&rm->hash, &kv->kv, &kv->kv))
326 if (vm->thread_index != kv->v.thread_index)
331 reass = pool_elt_at_index (rt->pool, kv->v.reass_index);
333 if (now > reass->last_heard + rm->timeout)
335 ip4_sv_reass_free (vm, rm, rt, reass);
342 reass->last_heard = now;
346 if (rt->reass_n >= rm->max_reass_n && rm->max_reass_n)
348 reass = pool_elt_at_index (rt->pool, rt->lru_first);
349 ip4_sv_reass_free (vm, rm, rt, reass);
352 pool_get (rt->pool, reass);
353 clib_memset (reass, 0, sizeof (*reass));
354 reass->id = ((u64) vm->thread_index * 1000000000) + rt->id_counter;
356 ip4_sv_reass_init (reass);
358 reass->lru_prev = reass->lru_next = ~0;
360 if (~0 != rt->lru_last)
362 ip4_sv_reass_t *lru_last = pool_elt_at_index (rt->pool, rt->lru_last);
363 reass->lru_prev = rt->lru_last;
364 lru_last->lru_next = rt->lru_last = reass - rt->pool;
367 if (~0 == rt->lru_first)
369 rt->lru_first = rt->lru_last = reass - rt->pool;
372 reass->key.as_u64[0] = kv->kv.key[0];
373 reass->key.as_u64[1] = kv->kv.key[1];
374 kv->v.reass_index = (reass - rt->pool);
375 kv->v.thread_index = vm->thread_index;
376 reass->last_heard = now;
378 if (clib_bihash_add_del_16_8 (&rm->hash, &kv->kv, 1))
380 ip4_sv_reass_free (vm, rm, rt, reass);
387 always_inline ip4_sv_reass_rc_t
388 ip4_sv_reass_update (vlib_main_t *vm, vlib_node_runtime_t *node,
389 ip4_sv_reass_main_t *rm, ip4_header_t *ip0,
390 ip4_sv_reass_t *reass, u32 bi0)
392 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
393 ip4_sv_reass_rc_t rc = IP4_SV_REASS_RC_OK;
394 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
395 if (0 == fragment_first)
397 reass->ip_proto = ip0->protocol;
398 reass->l4_src_port = ip4_get_port (ip0, 1);
399 reass->l4_dst_port = ip4_get_port (ip0, 0);
400 if (!reass->l4_src_port || !reass->l4_dst_port)
401 return IP4_SV_REASS_RC_UNSUPP_IP_PROTO;
402 if (IP_PROTOCOL_TCP == reass->ip_proto)
404 reass->icmp_type_or_tcp_flags = ((tcp_header_t *) (ip0 + 1))->flags;
405 reass->tcp_ack_number = ((tcp_header_t *) (ip0 + 1))->ack_number;
406 reass->tcp_seq_number = ((tcp_header_t *) (ip0 + 1))->seq_number;
408 else if (IP_PROTOCOL_ICMP == reass->ip_proto)
410 reass->icmp_type_or_tcp_flags =
411 ((icmp46_header_t *) (ip0 + 1))->type;
413 reass->is_complete = true;
414 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
415 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
417 ip4_sv_reass_add_trace (
418 vm, node, reass, bi0, REASS_FINISH, reass->ip_proto,
419 reass->l4_src_port, reass->l4_dst_port,
420 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
423 vec_add1 (reass->cached_buffers, bi0);
424 if (!reass->is_complete)
426 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
428 ip4_sv_reass_add_trace (
429 vm, node, reass, bi0, REASS_FRAGMENT_CACHE, ~0, ~0, ~0,
430 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
432 if (vec_len (reass->cached_buffers) > rm->max_reass_len)
434 rc = IP4_SV_REASS_RC_TOO_MANY_FRAGMENTS;
441 l4_layer_truncated (ip4_header_t *ip)
443 static const int l4_layer_length[256] = {
444 [IP_PROTOCOL_TCP] = sizeof (tcp_header_t),
445 [IP_PROTOCOL_UDP] = sizeof (udp_header_t),
446 [IP_PROTOCOL_ICMP] = sizeof (icmp46_header_t),
449 return ((u8 *) ip + ip4_header_bytes (ip) + l4_layer_length[ip->protocol] >
450 (u8 *) ip + clib_net_to_host_u16 (ip->length));
454 ip4_sv_reass_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
455 vlib_frame_t * frame, bool is_feature,
456 bool is_output_feature, bool is_custom)
458 u32 *from = vlib_frame_vector_args (frame);
459 u32 n_left_from, n_left_to_next, *to_next, next_index;
460 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
461 ip4_sv_reass_per_thread_t *rt = &rm->per_thread_data[vm->thread_index];
462 clib_spinlock_lock (&rt->lock);
464 n_left_from = frame->n_vectors;
465 next_index = node->cached_next_index;
467 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
468 vlib_get_buffers (vm, from, bufs, n_left_from);
469 u16 nexts[VLIB_FRAME_SIZE], *next = nexts;
472 /* optimistic case first - no fragments */
473 while (n_left_from >= 2)
475 vlib_buffer_t *b0, *b1;
482 /* Prefetch next iteration. */
483 if (PREDICT_TRUE (n_left_from >= 4))
485 vlib_buffer_t *p2, *p3;
490 vlib_prefetch_buffer_header (p2, LOAD);
491 vlib_prefetch_buffer_header (p3, LOAD);
493 clib_prefetch_load (p2->data);
494 clib_prefetch_load (p3->data);
498 (ip4_header_t *) u8_ptr_add (vlib_buffer_get_current (b0),
499 (is_output_feature ? 1 : 0) *
501 ip.save_rewrite_length);
503 (ip4_header_t *) u8_ptr_add (vlib_buffer_get_current (b1),
504 (is_output_feature ? 1 : 0) *
506 ip.save_rewrite_length);
509 (ip4_get_fragment_more (ip0) || ip4_get_fragment_offset (ip0))
510 || (ip4_get_fragment_more (ip1) || ip4_get_fragment_offset (ip1)))
512 // fragment found, go slow path
516 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
523 vnet_feature_next (&next0, b0);
527 next0 = is_custom ? vnet_buffer (b0)->ip.reass.next_index :
528 IP4_SV_REASSEMBLY_NEXT_INPUT;
530 vnet_buffer (b0)->ip.reass.is_non_first_fragment = 0;
531 vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
532 if (l4_layer_truncated (ip0))
534 vnet_buffer (b0)->ip.reass.l4_layer_truncated = 1;
535 vnet_buffer (b0)->ip.reass.l4_src_port = 0;
536 vnet_buffer (b0)->ip.reass.l4_dst_port = 0;
540 vnet_buffer (b0)->ip.reass.l4_layer_truncated = 0;
541 if (IP_PROTOCOL_TCP == ip0->protocol)
543 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
544 ((tcp_header_t *) (ip0 + 1))->flags;
545 vnet_buffer (b0)->ip.reass.tcp_ack_number =
546 ((tcp_header_t *) (ip0 + 1))->ack_number;
547 vnet_buffer (b0)->ip.reass.tcp_seq_number =
548 ((tcp_header_t *) (ip0 + 1))->seq_number;
550 else if (IP_PROTOCOL_ICMP == ip0->protocol)
552 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
553 ((icmp46_header_t *) (ip0 + 1))->type;
555 vnet_buffer (b0)->ip.reass.l4_src_port = ip4_get_port (ip0, 1);
556 vnet_buffer (b0)->ip.reass.l4_dst_port = ip4_get_port (ip0, 0);
558 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
560 ip4_sv_reass_add_trace (
561 vm, node, NULL, from[(b - 2) - bufs], REASS_PASSTHROUGH,
562 vnet_buffer (b0)->ip.reass.ip_proto,
563 vnet_buffer (b0)->ip.reass.l4_src_port,
564 vnet_buffer (b0)->ip.reass.l4_dst_port,
565 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
569 vnet_feature_next (&next1, b1);
573 next1 = is_custom ? vnet_buffer (b1)->ip.reass.next_index :
574 IP4_SV_REASSEMBLY_NEXT_INPUT;
576 vnet_buffer (b1)->ip.reass.is_non_first_fragment = 0;
577 vnet_buffer (b1)->ip.reass.ip_proto = ip1->protocol;
578 if (l4_layer_truncated (ip1))
580 vnet_buffer (b1)->ip.reass.l4_layer_truncated = 1;
581 vnet_buffer (b1)->ip.reass.l4_src_port = 0;
582 vnet_buffer (b1)->ip.reass.l4_dst_port = 0;
586 vnet_buffer (b1)->ip.reass.l4_layer_truncated = 0;
587 if (IP_PROTOCOL_TCP == ip1->protocol)
589 vnet_buffer (b1)->ip.reass.icmp_type_or_tcp_flags =
590 ((tcp_header_t *) (ip1 + 1))->flags;
591 vnet_buffer (b1)->ip.reass.tcp_ack_number =
592 ((tcp_header_t *) (ip1 + 1))->ack_number;
593 vnet_buffer (b1)->ip.reass.tcp_seq_number =
594 ((tcp_header_t *) (ip1 + 1))->seq_number;
596 else if (IP_PROTOCOL_ICMP == ip1->protocol)
598 vnet_buffer (b1)->ip.reass.icmp_type_or_tcp_flags =
599 ((icmp46_header_t *) (ip1 + 1))->type;
601 vnet_buffer (b1)->ip.reass.l4_src_port = ip4_get_port (ip1, 1);
602 vnet_buffer (b1)->ip.reass.l4_dst_port = ip4_get_port (ip1, 0);
604 if (PREDICT_FALSE (b1->flags & VLIB_BUFFER_IS_TRACED))
606 ip4_sv_reass_add_trace (
607 vm, node, NULL, from[(b - 1) - bufs], REASS_PASSTHROUGH,
608 vnet_buffer (b1)->ip.reass.ip_proto,
609 vnet_buffer (b1)->ip.reass.l4_src_port,
610 vnet_buffer (b1)->ip.reass.l4_dst_port,
611 vnet_buffer (b1)->ip.reass.l4_layer_truncated);
620 while (n_left_from > 0)
628 (ip4_header_t *) u8_ptr_add (vlib_buffer_get_current (b0),
629 (is_output_feature ? 1 : 0) *
631 ip.save_rewrite_length);
633 (ip4_get_fragment_more (ip0) || ip4_get_fragment_offset (ip0)))
635 // fragment found, go slow path
639 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
646 vnet_feature_next (&next0, b0);
651 is_custom ? vnet_buffer (b0)->ip.
652 reass.next_index : IP4_SV_REASSEMBLY_NEXT_INPUT;
654 vnet_buffer (b0)->ip.reass.is_non_first_fragment = 0;
655 vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
656 if (l4_layer_truncated (ip0))
658 vnet_buffer (b0)->ip.reass.l4_layer_truncated = 1;
662 vnet_buffer (b0)->ip.reass.l4_layer_truncated = 0;
663 if (IP_PROTOCOL_TCP == ip0->protocol)
665 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
666 ((tcp_header_t *) (ip0 + 1))->flags;
667 vnet_buffer (b0)->ip.reass.tcp_ack_number =
668 ((tcp_header_t *) (ip0 + 1))->ack_number;
669 vnet_buffer (b0)->ip.reass.tcp_seq_number =
670 ((tcp_header_t *) (ip0 + 1))->seq_number;
672 else if (IP_PROTOCOL_ICMP == ip0->protocol)
674 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
675 ((icmp46_header_t *) (ip0 + 1))->type;
677 vnet_buffer (b0)->ip.reass.l4_src_port = ip4_get_port (ip0, 1);
678 vnet_buffer (b0)->ip.reass.l4_dst_port = ip4_get_port (ip0, 0);
680 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
682 ip4_sv_reass_add_trace (
683 vm, node, NULL, from[(b - 1) - bufs], REASS_PASSTHROUGH,
684 vnet_buffer (b0)->ip.reass.ip_proto,
685 vnet_buffer (b0)->ip.reass.l4_src_port,
686 vnet_buffer (b0)->ip.reass.l4_dst_port,
687 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
695 vlib_buffer_enqueue_to_next (vm, node, from, (u16 *) nexts,
704 while (n_left_from > 0)
706 vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
708 while (n_left_from > 0 && n_left_to_next > 0)
713 u32 error0 = IP4_ERROR_NONE;
716 b0 = vlib_get_buffer (vm, bi0);
719 (ip4_header_t *) u8_ptr_add (vlib_buffer_get_current (b0),
720 (is_output_feature ? 1 : 0) *
722 ip.save_rewrite_length);
723 if (!ip4_get_fragment_more (ip0) && !ip4_get_fragment_offset (ip0))
725 // this is a regular packet - no fragmentation
728 next0 = vnet_buffer (b0)->ip.reass.next_index;
732 next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
734 vnet_buffer (b0)->ip.reass.is_non_first_fragment = 0;
735 vnet_buffer (b0)->ip.reass.ip_proto = ip0->protocol;
736 if (l4_layer_truncated (ip0))
738 vnet_buffer (b0)->ip.reass.l4_layer_truncated = 1;
739 vnet_buffer (b0)->ip.reass.l4_src_port = 0;
740 vnet_buffer (b0)->ip.reass.l4_dst_port = 0;
744 vnet_buffer (b0)->ip.reass.l4_layer_truncated = 0;
745 if (IP_PROTOCOL_TCP == ip0->protocol)
747 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
748 ((tcp_header_t *) (ip0 + 1))->flags;
749 vnet_buffer (b0)->ip.reass.tcp_ack_number =
750 ((tcp_header_t *) (ip0 + 1))->ack_number;
751 vnet_buffer (b0)->ip.reass.tcp_seq_number =
752 ((tcp_header_t *) (ip0 + 1))->seq_number;
754 else if (IP_PROTOCOL_ICMP == ip0->protocol)
756 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
757 ((icmp46_header_t *) (ip0 + 1))->type;
759 vnet_buffer (b0)->ip.reass.l4_src_port =
760 ip4_get_port (ip0, 1);
761 vnet_buffer (b0)->ip.reass.l4_dst_port =
762 ip4_get_port (ip0, 0);
764 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
766 ip4_sv_reass_add_trace (
767 vm, node, NULL, bi0, REASS_PASSTHROUGH,
768 vnet_buffer (b0)->ip.reass.ip_proto,
769 vnet_buffer (b0)->ip.reass.l4_src_port,
770 vnet_buffer (b0)->ip.reass.l4_dst_port,
771 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
775 const u32 fragment_first = ip4_get_fragment_offset_bytes (ip0);
776 const u32 fragment_length =
777 clib_net_to_host_u16 (ip0->length) - ip4_header_bytes (ip0);
778 const u32 fragment_last = fragment_first + fragment_length - 1;
779 if (fragment_first > fragment_last || fragment_first + fragment_length > UINT16_MAX - 20 || (fragment_length < 8 && ip4_get_fragment_more (ip0))) // 8 is minimum frag length per RFC 791
781 next0 = IP4_SV_REASSEMBLY_NEXT_DROP;
782 error0 = IP4_ERROR_REASS_MALFORMED_PACKET;
783 b0->error = node->errors[error0];
786 ip4_sv_reass_kv_t kv;
790 (u64) vec_elt (ip4_main.fib_index_by_sw_if_index,
791 vnet_buffer (b0)->sw_if_index[VLIB_RX]) |
792 (u64) ip0->src_address.as_u32 << 32;
794 (u64) ip0->dst_address.
795 as_u32 | (u64) ip0->fragment_id << 32 | (u64) ip0->protocol << 48;
797 ip4_sv_reass_t *reass =
798 ip4_sv_reass_find_or_create (vm, rm, rt, &kv, &do_handoff);
800 if (PREDICT_FALSE (do_handoff))
802 next0 = IP4_SV_REASSEMBLY_NEXT_HANDOFF;
803 vnet_buffer (b0)->ip.reass.owner_thread_index =
810 next0 = IP4_SV_REASSEMBLY_NEXT_DROP;
811 error0 = IP4_ERROR_REASS_LIMIT_REACHED;
812 b0->error = node->errors[error0];
816 if (reass->is_complete)
820 next0 = vnet_buffer (b0)->ip.reass.next_index;
824 next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
826 vnet_buffer (b0)->ip.reass.is_non_first_fragment =
828 vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
829 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
830 reass->icmp_type_or_tcp_flags;
831 vnet_buffer (b0)->ip.reass.tcp_ack_number =
832 reass->tcp_ack_number;
833 vnet_buffer (b0)->ip.reass.tcp_seq_number =
834 reass->tcp_seq_number;
835 vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
836 vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
837 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
839 ip4_sv_reass_add_trace (
840 vm, node, reass, bi0, REASS_FRAGMENT_FORWARD,
841 reass->ip_proto, reass->l4_src_port, reass->l4_dst_port,
842 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
847 ip4_sv_reass_rc_t rc =
848 ip4_sv_reass_update (vm, node, rm, ip0, reass, bi0);
852 case IP4_SV_REASS_RC_OK:
853 /* nothing to do here */
855 case IP4_SV_REASS_RC_TOO_MANY_FRAGMENTS:
856 counter = IP4_ERROR_REASS_FRAGMENT_CHAIN_TOO_LONG;
858 case IP4_SV_REASS_RC_UNSUPP_IP_PROTO:
859 counter = IP4_ERROR_REASS_UNSUPP_IP_PROT;
864 vlib_node_increment_counter (vm, node->node_index, counter, 1);
865 ip4_sv_reass_free (vm, rm, rt, reass);
868 if (reass->is_complete)
871 vec_foreach_index (idx, reass->cached_buffers)
873 u32 bi0 = vec_elt (reass->cached_buffers, idx);
874 vlib_buffer_t *b0 = vlib_get_buffer (vm, bi0);
876 (ip4_header_t *) u8_ptr_add (vlib_buffer_get_current (b0),
877 (is_output_feature ? 1 : 0) *
879 ip.save_rewrite_length);
880 u32 next0 = IP4_SV_REASSEMBLY_NEXT_INPUT;
883 vnet_feature_next (&next0, b0);
887 next0 = vnet_buffer (b0)->ip.reass.next_index;
889 if (0 == n_left_to_next)
891 vlib_put_next_frame (vm, node, next_index,
893 vlib_get_next_frame (vm, node, next_index, to_next,
899 vnet_buffer (b0)->ip.reass.is_non_first_fragment =
900 ! !ip4_get_fragment_offset (ip0);
901 vnet_buffer (b0)->ip.reass.ip_proto = reass->ip_proto;
902 vnet_buffer (b0)->ip.reass.icmp_type_or_tcp_flags =
903 reass->icmp_type_or_tcp_flags;
904 vnet_buffer (b0)->ip.reass.tcp_ack_number =
905 reass->tcp_ack_number;
906 vnet_buffer (b0)->ip.reass.tcp_seq_number =
907 reass->tcp_seq_number;
908 vnet_buffer (b0)->ip.reass.l4_src_port = reass->l4_src_port;
909 vnet_buffer (b0)->ip.reass.l4_dst_port = reass->l4_dst_port;
910 if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
912 ip4_sv_reass_add_trace (
913 vm, node, reass, bi0, REASS_FRAGMENT_FORWARD,
914 reass->ip_proto, reass->l4_src_port, reass->l4_dst_port,
915 vnet_buffer (b0)->ip.reass.l4_layer_truncated);
917 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
918 to_next, n_left_to_next, bi0,
921 _vec_len (reass->cached_buffers) = 0; // buffers are owned by frame now
929 if (is_feature && IP4_ERROR_NONE == error0)
931 b0 = vlib_get_buffer (vm, bi0);
932 vnet_feature_next (&next0, b0);
934 vlib_validate_buffer_enqueue_x1 (vm, node, next_index,
935 to_next, n_left_to_next,
943 vlib_put_next_frame (vm, node, next_index, n_left_to_next);
947 clib_spinlock_unlock (&rt->lock);
948 return frame->n_vectors;
951 static char *ip4_sv_reass_error_strings[] = {
952 #define _(sym, string) string,
957 VLIB_NODE_FN (ip4_sv_reass_node) (vlib_main_t * vm,
958 vlib_node_runtime_t * node,
959 vlib_frame_t * frame)
961 return ip4_sv_reass_inline (vm, node, frame, false /* is_feature */ ,
962 false /* is_output_feature */ ,
963 false /* is_custom */ );
967 VLIB_REGISTER_NODE (ip4_sv_reass_node) = {
968 .name = "ip4-sv-reassembly",
969 .vector_size = sizeof (u32),
970 .format_trace = format_ip4_sv_reass_trace,
971 .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
972 .error_strings = ip4_sv_reass_error_strings,
973 .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
976 [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
977 [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
978 [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reassembly-handoff",
984 VLIB_NODE_FN (ip4_sv_reass_node_feature) (vlib_main_t * vm,
985 vlib_node_runtime_t * node,
986 vlib_frame_t * frame)
988 return ip4_sv_reass_inline (vm, node, frame, true /* is_feature */ ,
989 false /* is_output_feature */ ,
990 false /* is_custom */ );
994 VLIB_REGISTER_NODE (ip4_sv_reass_node_feature) = {
995 .name = "ip4-sv-reassembly-feature",
996 .vector_size = sizeof (u32),
997 .format_trace = format_ip4_sv_reass_trace,
998 .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
999 .error_strings = ip4_sv_reass_error_strings,
1000 .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
1003 [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1004 [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1005 [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reass-feature-hoff",
1011 VNET_FEATURE_INIT (ip4_sv_reass_feature) = {
1012 .arc_name = "ip4-unicast",
1013 .node_name = "ip4-sv-reassembly-feature",
1014 .runs_before = VNET_FEATURES ("ip4-lookup"),
1019 VLIB_NODE_FN (ip4_sv_reass_node_output_feature) (vlib_main_t * vm,
1020 vlib_node_runtime_t * node,
1021 vlib_frame_t * frame)
1023 return ip4_sv_reass_inline (vm, node, frame, true /* is_feature */ ,
1024 true /* is_output_feature */ ,
1025 false /* is_custom */ );
1030 VLIB_REGISTER_NODE (ip4_sv_reass_node_output_feature) = {
1031 .name = "ip4-sv-reassembly-output-feature",
1032 .vector_size = sizeof (u32),
1033 .format_trace = format_ip4_sv_reass_trace,
1034 .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
1035 .error_strings = ip4_sv_reass_error_strings,
1036 .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
1039 [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1040 [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1041 [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reass-feature-hoff",
1047 VNET_FEATURE_INIT (ip4_sv_reass_output_feature) = {
1048 .arc_name = "ip4-output",
1049 .node_name = "ip4-sv-reassembly-output-feature",
1056 VLIB_REGISTER_NODE (ip4_sv_reass_custom_node) = {
1057 .name = "ip4-sv-reassembly-custom-next",
1058 .vector_size = sizeof (u32),
1059 .format_trace = format_ip4_sv_reass_trace,
1060 .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
1061 .error_strings = ip4_sv_reass_error_strings,
1062 .n_next_nodes = IP4_SV_REASSEMBLY_N_NEXT,
1065 [IP4_SV_REASSEMBLY_NEXT_INPUT] = "ip4-input",
1066 [IP4_SV_REASSEMBLY_NEXT_DROP] = "ip4-drop",
1067 [IP4_SV_REASSEMBLY_NEXT_HANDOFF] = "ip4-sv-reassembly-handoff",
1073 VLIB_NODE_FN (ip4_sv_reass_custom_node) (vlib_main_t * vm,
1074 vlib_node_runtime_t * node,
1075 vlib_frame_t * frame)
1077 return ip4_sv_reass_inline (vm, node, frame, false /* is_feature */ ,
1078 false /* is_output_feature */ ,
1079 true /* is_custom */ );
1082 #ifndef CLIB_MARCH_VARIANT
1084 ip4_sv_reass_get_nbuckets ()
1086 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1090 nbuckets = (u32) (rm->max_reass_n / IP4_SV_REASS_HT_LOAD_FACTOR);
1092 for (i = 0; i < 31; i++)
1093 if ((1 << i) >= nbuckets)
1099 #endif /* CLIB_MARCH_VARIANT */
1103 IP4_EVENT_CONFIG_CHANGED = 1,
1104 } ip4_sv_reass_event_t;
1109 clib_bihash_16_8_t *new_hash;
1110 } ip4_rehash_cb_ctx;
1112 #ifndef CLIB_MARCH_VARIANT
1114 ip4_rehash_cb (clib_bihash_kv_16_8_t * kv, void *_ctx)
1116 ip4_rehash_cb_ctx *ctx = _ctx;
1117 if (clib_bihash_add_del_16_8 (ctx->new_hash, kv, 1))
1121 return (BIHASH_WALK_CONTINUE);
1125 ip4_sv_reass_set_params (u32 timeout_ms, u32 max_reassemblies,
1126 u32 max_reassembly_length,
1127 u32 expire_walk_interval_ms)
1129 ip4_sv_reass_main.timeout_ms = timeout_ms;
1130 ip4_sv_reass_main.timeout = (f64) timeout_ms / (f64) MSEC_PER_SEC;
1131 ip4_sv_reass_main.max_reass_n = max_reassemblies;
1132 ip4_sv_reass_main.max_reass_len = max_reassembly_length;
1133 ip4_sv_reass_main.expire_walk_interval_ms = expire_walk_interval_ms;
1137 ip4_sv_reass_set (u32 timeout_ms, u32 max_reassemblies,
1138 u32 max_reassembly_length, u32 expire_walk_interval_ms)
1140 u32 old_nbuckets = ip4_sv_reass_get_nbuckets ();
1141 ip4_sv_reass_set_params (timeout_ms, max_reassemblies,
1142 max_reassembly_length, expire_walk_interval_ms);
1143 vlib_process_signal_event (ip4_sv_reass_main.vlib_main,
1144 ip4_sv_reass_main.ip4_sv_reass_expire_node_idx,
1145 IP4_EVENT_CONFIG_CHANGED, 0);
1146 u32 new_nbuckets = ip4_sv_reass_get_nbuckets ();
1147 if (ip4_sv_reass_main.max_reass_n > 0 && new_nbuckets > old_nbuckets)
1149 clib_bihash_16_8_t new_hash;
1150 clib_memset (&new_hash, 0, sizeof (new_hash));
1151 ip4_rehash_cb_ctx ctx;
1153 ctx.new_hash = &new_hash;
1154 clib_bihash_init_16_8 (&new_hash, "ip4-dr", new_nbuckets,
1155 new_nbuckets * 1024);
1156 clib_bihash_foreach_key_value_pair_16_8 (&ip4_sv_reass_main.hash,
1157 ip4_rehash_cb, &ctx);
1160 clib_bihash_free_16_8 (&new_hash);
1165 clib_bihash_free_16_8 (&ip4_sv_reass_main.hash);
1166 clib_memcpy_fast (&ip4_sv_reass_main.hash, &new_hash,
1167 sizeof (ip4_sv_reass_main.hash));
1168 clib_bihash_copied (&ip4_sv_reass_main.hash, &new_hash);
1175 ip4_sv_reass_get (u32 * timeout_ms, u32 * max_reassemblies,
1176 u32 * max_reassembly_length, u32 * expire_walk_interval_ms)
1178 *timeout_ms = ip4_sv_reass_main.timeout_ms;
1179 *max_reassemblies = ip4_sv_reass_main.max_reass_n;
1180 *max_reassembly_length = ip4_sv_reass_main.max_reass_len;
1181 *expire_walk_interval_ms = ip4_sv_reass_main.expire_walk_interval_ms;
1185 static clib_error_t *
1186 ip4_sv_reass_init_function (vlib_main_t * vm)
1188 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1189 clib_error_t *error = 0;
1194 rm->vnet_main = vnet_get_main ();
1196 vec_validate (rm->per_thread_data, vlib_num_workers ());
1197 ip4_sv_reass_per_thread_t *rt;
1198 vec_foreach (rt, rm->per_thread_data)
1200 clib_spinlock_init (&rt->lock);
1201 pool_alloc (rt->pool, rm->max_reass_n);
1202 rt->lru_first = rt->lru_last = ~0;
1205 node = vlib_get_node_by_name (vm, (u8 *) "ip4-sv-reassembly-expire-walk");
1207 rm->ip4_sv_reass_expire_node_idx = node->index;
1209 ip4_sv_reass_set_params (IP4_SV_REASS_TIMEOUT_DEFAULT_MS,
1210 IP4_SV_REASS_MAX_REASSEMBLIES_DEFAULT,
1211 IP4_SV_REASS_MAX_REASSEMBLY_LENGTH_DEFAULT,
1212 IP4_SV_REASS_EXPIRE_WALK_INTERVAL_DEFAULT_MS);
1214 nbuckets = ip4_sv_reass_get_nbuckets ();
1215 clib_bihash_init_16_8 (&rm->hash, "ip4-dr", nbuckets, nbuckets * 1024);
1217 node = vlib_get_node_by_name (vm, (u8 *) "ip4-drop");
1219 rm->ip4_drop_idx = node->index;
1221 rm->fq_index = vlib_frame_queue_main_init (ip4_sv_reass_node.index, 0);
1222 rm->fq_feature_index =
1223 vlib_frame_queue_main_init (ip4_sv_reass_node_feature.index, 0);
1225 rm->feature_use_refcount_per_intf = NULL;
1226 rm->output_feature_use_refcount_per_intf = NULL;
1231 VLIB_INIT_FUNCTION (ip4_sv_reass_init_function);
1232 #endif /* CLIB_MARCH_VARIANT */
1235 ip4_sv_reass_walk_expired (vlib_main_t *vm,
1236 CLIB_UNUSED (vlib_node_runtime_t *node),
1237 CLIB_UNUSED (vlib_frame_t *f))
1239 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1240 uword event_type, *event_data = 0;
1244 vlib_process_wait_for_event_or_clock (vm,
1246 rm->expire_walk_interval_ms /
1247 (f64) MSEC_PER_SEC);
1248 event_type = vlib_process_get_events (vm, &event_data);
1253 /* no events => timeout */
1255 case IP4_EVENT_CONFIG_CHANGED:
1256 /* nothing to do here */
1259 clib_warning ("BUG: event type 0x%wx", event_type);
1262 f64 now = vlib_time_now (vm);
1264 ip4_sv_reass_t *reass;
1265 int *pool_indexes_to_free = NULL;
1267 uword thread_index = 0;
1269 const uword nthreads = vlib_num_workers () + 1;
1270 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1272 ip4_sv_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1273 clib_spinlock_lock (&rt->lock);
1275 vec_reset_length (pool_indexes_to_free);
1277 pool_foreach_index (index, rt->pool) {
1278 reass = pool_elt_at_index (rt->pool, index);
1279 if (now > reass->last_heard + rm->timeout)
1281 vec_add1 (pool_indexes_to_free, index);
1287 vec_foreach (i, pool_indexes_to_free)
1289 ip4_sv_reass_t *reass = pool_elt_at_index (rt->pool, i[0]);
1290 ip4_sv_reass_free (vm, rm, rt, reass);
1294 clib_spinlock_unlock (&rt->lock);
1297 vec_free (pool_indexes_to_free);
1300 _vec_len (event_data) = 0;
1308 VLIB_REGISTER_NODE (ip4_sv_reass_expire_node) = {
1309 .function = ip4_sv_reass_walk_expired,
1310 .type = VLIB_NODE_TYPE_PROCESS,
1311 .name = "ip4-sv-reassembly-expire-walk",
1312 .format_trace = format_ip4_sv_reass_trace,
1313 .n_errors = ARRAY_LEN (ip4_sv_reass_error_strings),
1314 .error_strings = ip4_sv_reass_error_strings,
1320 format_ip4_sv_reass_key (u8 * s, va_list * args)
1322 ip4_sv_reass_key_t *key = va_arg (*args, ip4_sv_reass_key_t *);
1324 format (s, "fib_index: %u, src: %U, dst: %U, frag_id: %u, proto: %u",
1325 key->fib_index, format_ip4_address, &key->src, format_ip4_address,
1326 &key->dst, clib_net_to_host_u16 (key->frag_id), key->proto);
1331 format_ip4_sv_reass (u8 * s, va_list * args)
1333 vlib_main_t *vm = va_arg (*args, vlib_main_t *);
1334 ip4_sv_reass_t *reass = va_arg (*args, ip4_sv_reass_t *);
1336 s = format (s, "ID: %lu, key: %U trace_op_counter: %u\n",
1337 reass->id, format_ip4_sv_reass_key, &reass->key,
1338 reass->trace_op_counter);
1343 vec_foreach (bip, reass->cached_buffers)
1348 b = vlib_get_buffer (vm, bi);
1349 s = format (s, " #%03u: bi: %u, ", counter, bi);
1351 bi = b->next_buffer;
1353 while (b->flags & VLIB_BUFFER_NEXT_PRESENT);
1358 static clib_error_t *
1359 show_ip4_reass (vlib_main_t * vm,
1360 unformat_input_t * input,
1361 CLIB_UNUSED (vlib_cli_command_t * lmd))
1363 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1365 vlib_cli_output (vm, "---------------------");
1366 vlib_cli_output (vm, "IP4 reassembly status");
1367 vlib_cli_output (vm, "---------------------");
1368 bool details = false;
1369 if (unformat (input, "details"))
1374 u32 sum_reass_n = 0;
1375 ip4_sv_reass_t *reass;
1377 const uword nthreads = vlib_num_workers () + 1;
1378 for (thread_index = 0; thread_index < nthreads; ++thread_index)
1380 ip4_sv_reass_per_thread_t *rt = &rm->per_thread_data[thread_index];
1381 clib_spinlock_lock (&rt->lock);
1385 pool_foreach (reass, rt->pool) {
1386 vlib_cli_output (vm, "%U", format_ip4_sv_reass, vm, reass);
1390 sum_reass_n += rt->reass_n;
1391 clib_spinlock_unlock (&rt->lock);
1393 vlib_cli_output (vm, "---------------------");
1394 vlib_cli_output (vm, "Current IP4 reassemblies count: %lu\n",
1395 (long unsigned) sum_reass_n);
1396 vlib_cli_output (vm,
1397 "Maximum configured concurrent shallow virtual IP4 reassemblies per worker-thread: %lu\n",
1398 (long unsigned) rm->max_reass_n);
1399 vlib_cli_output (vm,
1400 "Maximum configured amount of fragments per shallow "
1401 "virtual IP4 reassembly: %lu\n",
1402 (long unsigned) rm->max_reass_len);
1403 vlib_cli_output (vm,
1404 "Maximum configured shallow virtual IP4 reassembly timeout: %lums\n",
1405 (long unsigned) rm->timeout_ms);
1406 vlib_cli_output (vm,
1407 "Maximum configured shallow virtual IP4 reassembly expire walk interval: %lums\n",
1408 (long unsigned) rm->expire_walk_interval_ms);
1413 VLIB_CLI_COMMAND (show_ip4_sv_reass_cmd, static) = {
1414 .path = "show ip4-sv-reassembly",
1415 .short_help = "show ip4-sv-reassembly [details]",
1416 .function = show_ip4_reass,
1420 #ifndef CLIB_MARCH_VARIANT
1422 ip4_sv_reass_enable_disable (u32 sw_if_index, u8 enable_disable)
1424 return ip4_sv_reass_enable_disable_with_refcnt (sw_if_index,
1427 #endif /* CLIB_MARCH_VARIANT */
1430 #define foreach_ip4_sv_reass_handoff_error \
1431 _(CONGESTION_DROP, "congestion drop")
1436 #define _(sym,str) IP4_SV_REASSEMBLY_HANDOFF_ERROR_##sym,
1437 foreach_ip4_sv_reass_handoff_error
1439 IP4_SV_REASSEMBLY_HANDOFF_N_ERROR,
1440 } ip4_sv_reass_handoff_error_t;
1442 static char *ip4_sv_reass_handoff_error_strings[] = {
1443 #define _(sym,string) string,
1444 foreach_ip4_sv_reass_handoff_error
1450 u32 next_worker_index;
1451 } ip4_sv_reass_handoff_trace_t;
1454 format_ip4_sv_reass_handoff_trace (u8 * s, va_list * args)
1456 CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
1457 CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
1458 ip4_sv_reass_handoff_trace_t *t =
1459 va_arg (*args, ip4_sv_reass_handoff_trace_t *);
1462 format (s, "ip4-sv-reassembly-handoff: next-worker %d",
1463 t->next_worker_index);
1469 ip4_sv_reass_handoff_node_inline (vlib_main_t * vm,
1470 vlib_node_runtime_t * node,
1471 vlib_frame_t * frame, bool is_feature)
1473 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1475 vlib_buffer_t *bufs[VLIB_FRAME_SIZE], **b;
1476 u32 n_enq, n_left_from, *from;
1477 u16 thread_indices[VLIB_FRAME_SIZE], *ti;
1480 from = vlib_frame_vector_args (frame);
1481 n_left_from = frame->n_vectors;
1482 vlib_get_buffers (vm, from, bufs, n_left_from);
1485 ti = thread_indices;
1487 fq_index = (is_feature) ? rm->fq_feature_index : rm->fq_index;
1489 while (n_left_from > 0)
1491 ti[0] = vnet_buffer (b[0])->ip.reass.owner_thread_index;
1494 ((node->flags & VLIB_NODE_FLAG_TRACE)
1495 && (b[0]->flags & VLIB_BUFFER_IS_TRACED)))
1497 ip4_sv_reass_handoff_trace_t *t =
1498 vlib_add_trace (vm, node, b[0], sizeof (*t));
1499 t->next_worker_index = ti[0];
1506 n_enq = vlib_buffer_enqueue_to_thread (vm, node, fq_index, from,
1507 thread_indices, frame->n_vectors, 1);
1509 if (n_enq < frame->n_vectors)
1510 vlib_node_increment_counter (vm, node->node_index,
1511 IP4_SV_REASSEMBLY_HANDOFF_ERROR_CONGESTION_DROP,
1512 frame->n_vectors - n_enq);
1513 return frame->n_vectors;
1516 VLIB_NODE_FN (ip4_sv_reass_handoff_node) (vlib_main_t * vm,
1517 vlib_node_runtime_t * node,
1518 vlib_frame_t * frame)
1520 return ip4_sv_reass_handoff_node_inline (vm, node, frame,
1521 false /* is_feature */ );
1526 VLIB_REGISTER_NODE (ip4_sv_reass_handoff_node) = {
1527 .name = "ip4-sv-reassembly-handoff",
1528 .vector_size = sizeof (u32),
1529 .n_errors = ARRAY_LEN(ip4_sv_reass_handoff_error_strings),
1530 .error_strings = ip4_sv_reass_handoff_error_strings,
1531 .format_trace = format_ip4_sv_reass_handoff_trace,
1543 VLIB_NODE_FN (ip4_sv_reass_feature_handoff_node) (vlib_main_t * vm,
1544 vlib_node_runtime_t *
1546 vlib_frame_t * frame)
1548 return ip4_sv_reass_handoff_node_inline (vm, node, frame,
1549 true /* is_feature */ );
1555 VLIB_REGISTER_NODE (ip4_sv_reass_feature_handoff_node) = {
1556 .name = "ip4-sv-reass-feature-hoff",
1557 .vector_size = sizeof (u32),
1558 .n_errors = ARRAY_LEN(ip4_sv_reass_handoff_error_strings),
1559 .error_strings = ip4_sv_reass_handoff_error_strings,
1560 .format_trace = format_ip4_sv_reass_handoff_trace,
1570 #ifndef CLIB_MARCH_VARIANT
1572 ip4_sv_reass_enable_disable_with_refcnt (u32 sw_if_index, int is_enable)
1574 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1575 vec_validate (rm->feature_use_refcount_per_intf, sw_if_index);
1578 if (!rm->feature_use_refcount_per_intf[sw_if_index])
1580 ++rm->feature_use_refcount_per_intf[sw_if_index];
1581 return vnet_feature_enable_disable ("ip4-unicast",
1582 "ip4-sv-reassembly-feature",
1583 sw_if_index, 1, 0, 0);
1585 ++rm->feature_use_refcount_per_intf[sw_if_index];
1589 if (rm->feature_use_refcount_per_intf[sw_if_index])
1590 --rm->feature_use_refcount_per_intf[sw_if_index];
1591 if (!rm->feature_use_refcount_per_intf[sw_if_index])
1592 return vnet_feature_enable_disable ("ip4-unicast",
1593 "ip4-sv-reassembly-feature",
1594 sw_if_index, 0, 0, 0);
1600 ip4_sv_reass_custom_register_next_node (uword node_index)
1602 return vlib_node_add_next (vlib_get_main (), ip4_sv_reass_custom_node.index,
1607 ip4_sv_reass_output_enable_disable_with_refcnt (u32 sw_if_index,
1610 ip4_sv_reass_main_t *rm = &ip4_sv_reass_main;
1611 vec_validate (rm->output_feature_use_refcount_per_intf, sw_if_index);
1614 if (!rm->output_feature_use_refcount_per_intf[sw_if_index])
1616 ++rm->output_feature_use_refcount_per_intf[sw_if_index];
1617 return vnet_feature_enable_disable ("ip4-output",
1618 "ip4-sv-reassembly-output-feature",
1619 sw_if_index, 1, 0, 0);
1621 ++rm->output_feature_use_refcount_per_intf[sw_if_index];
1625 if (rm->output_feature_use_refcount_per_intf[sw_if_index])
1626 --rm->output_feature_use_refcount_per_intf[sw_if_index];
1627 if (!rm->output_feature_use_refcount_per_intf[sw_if_index])
1628 return vnet_feature_enable_disable ("ip4-output",
1629 "ip4-sv-reassembly-output-feature",
1630 sw_if_index, 0, 0, 0);
1637 * fd.io coding-style-patch-verification: ON
1640 * eval: (c-set-style "gnu")