2 * Copyright (c) 2017-2019 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 <vnet/session/transport.h>
17 #include <vnet/session/session.h>
18 #include <vnet/fib/fib.h>
20 typedef struct local_endpoint_
22 transport_endpoint_t ep;
27 * Per-type vector of transport protocol virtual function tables
29 transport_proto_vft_t *tp_vfts;
34 static u32 port_allocator_seed;
37 * Local endpoints table
39 static transport_endpoint_table_t local_endpoints_table;
42 * Pool of local endpoints
44 static local_endpoint_t *local_endpoints;
47 * Local endpoints pool lock
49 static clib_spinlock_t local_endpoints_lock;
52 format_transport_proto (u8 * s, va_list * args)
54 u32 transport_proto = va_arg (*args, u32);
56 if (tp_vfts[transport_proto].transport_options.name)
57 s = format (s, "%s", tp_vfts[transport_proto].transport_options.name);
59 s = format (s, "n/a");
65 format_transport_proto_short (u8 * s, va_list * args)
67 u32 transport_proto = va_arg (*args, u32);
70 short_name = tp_vfts[transport_proto].transport_options.short_name;
72 s = format (s, "%s", short_name);
80 format_transport_connection (u8 * s, va_list * args)
82 u32 transport_proto = va_arg (*args, u32);
83 u32 conn_index = va_arg (*args, u32);
84 u32 thread_index = va_arg (*args, u32);
85 u32 verbose = va_arg (*args, u32);
86 transport_proto_vft_t *tp_vft;
87 transport_connection_t *tc;
90 tp_vft = transport_protocol_get_vft (transport_proto);
94 s = format (s, "%U", tp_vft->format_connection, conn_index, thread_index,
96 tc = tp_vft->get_connection (conn_index, thread_index);
97 if (tc && verbose > 1)
99 indent = format_get_indent (s) + 1;
100 if (transport_connection_is_tx_paced (tc))
101 s = format (s, "%Upacer: %U\n", format_white_space, indent,
102 format_transport_pacer, &tc->pacer, tc->thread_index);
103 s = format (s, "%Utransport: flags 0x%x\n", format_white_space, indent,
110 format_transport_listen_connection (u8 * s, va_list * args)
112 u32 transport_proto = va_arg (*args, u32);
113 transport_proto_vft_t *tp_vft;
115 tp_vft = transport_protocol_get_vft (transport_proto);
119 s = (tp_vft->format_listener) (s, args);
124 format_transport_half_open_connection (u8 * s, va_list * args)
126 u32 transport_proto = va_arg (*args, u32);
127 u32 listen_index = va_arg (*args, u32);
128 transport_proto_vft_t *tp_vft;
130 tp_vft = transport_protocol_get_vft (transport_proto);
134 s = format (s, "%U", tp_vft->format_half_open, listen_index);
139 unformat_transport_str_match (unformat_input_t * input, const char *str)
143 if (strlen (str) > vec_len (input->buffer) - input->index)
146 for (i = 0; i < strlen (str); i++)
148 if (input->buffer[i + input->index] != str[i])
155 unformat_transport_proto (unformat_input_t * input, va_list * args)
157 u32 *proto = va_arg (*args, u32 *);
158 transport_proto_vft_t *tp_vft;
159 u8 longest_match = 0, match;
160 char *str, *str_match = 0;
161 transport_proto_t tp;
163 for (tp = 0; tp < vec_len (tp_vfts); tp++)
165 tp_vft = &tp_vfts[tp];
166 str = tp_vft->transport_options.name;
169 if (unformat_transport_str_match (input, str))
171 match = strlen (str);
172 if (match > longest_match)
175 longest_match = match;
182 (void) unformat (input, str_match);
190 format_transport_protos (u8 * s, va_list * args)
192 transport_proto_vft_t *tp_vft;
194 vec_foreach (tp_vft, tp_vfts)
195 s = format (s, "%s\n", tp_vft->transport_options.name);
201 transport_endpoint_lookup (transport_endpoint_table_t * ht, u8 proto,
202 ip46_address_t * ip, u16 port)
204 clib_bihash_kv_24_8_t kv;
207 kv.key[0] = ip->as_u64[0];
208 kv.key[1] = ip->as_u64[1];
209 kv.key[2] = (u64) port << 8 | (u64) proto;
211 rv = clib_bihash_search_inline_24_8 (ht, &kv);
215 return ENDPOINT_INVALID_INDEX;
219 transport_endpoint_table_add (transport_endpoint_table_t * ht, u8 proto,
220 transport_endpoint_t * te, u32 value)
222 clib_bihash_kv_24_8_t kv;
224 kv.key[0] = te->ip.as_u64[0];
225 kv.key[1] = te->ip.as_u64[1];
226 kv.key[2] = (u64) te->port << 8 | (u64) proto;
229 clib_bihash_add_del_24_8 (ht, &kv, 1);
233 transport_endpoint_table_del (transport_endpoint_table_t * ht, u8 proto,
234 transport_endpoint_t * te)
236 clib_bihash_kv_24_8_t kv;
238 kv.key[0] = te->ip.as_u64[0];
239 kv.key[1] = te->ip.as_u64[1];
240 kv.key[2] = (u64) te->port << 8 | (u64) proto;
242 clib_bihash_add_del_24_8 (ht, &kv, 0);
246 transport_register_protocol (transport_proto_t transport_proto,
247 const transport_proto_vft_t * vft,
248 fib_protocol_t fib_proto, u32 output_node)
250 u8 is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
252 vec_validate (tp_vfts, transport_proto);
253 tp_vfts[transport_proto] = *vft;
255 session_register_transport (transport_proto, vft, is_ip4, output_node);
259 transport_register_new_protocol (const transport_proto_vft_t * vft,
260 fib_protocol_t fib_proto, u32 output_node)
262 transport_proto_t transport_proto;
265 transport_proto = session_add_transport_proto ();
266 is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
268 vec_validate (tp_vfts, transport_proto);
269 tp_vfts[transport_proto] = *vft;
271 session_register_transport (transport_proto, vft, is_ip4, output_node);
273 return transport_proto;
277 * Get transport virtual function table
279 * @param type - session type (not protocol type)
281 transport_proto_vft_t *
282 transport_protocol_get_vft (transport_proto_t transport_proto)
284 if (transport_proto >= vec_len (tp_vfts))
286 return &tp_vfts[transport_proto];
289 transport_service_type_t
290 transport_protocol_service_type (transport_proto_t tp)
292 return tp_vfts[tp].transport_options.service_type;
295 transport_tx_fn_type_t
296 transport_protocol_tx_fn_type (transport_proto_t tp)
298 return tp_vfts[tp].transport_options.tx_type;
302 transport_cleanup (transport_proto_t tp, u32 conn_index, u8 thread_index)
304 tp_vfts[tp].cleanup (conn_index, thread_index);
308 transport_cleanup_half_open (transport_proto_t tp, u32 conn_index)
310 if (tp_vfts[tp].cleanup)
311 tp_vfts[tp].cleanup_ho (conn_index);
315 transport_connect (transport_proto_t tp, transport_endpoint_cfg_t * tep)
317 return tp_vfts[tp].connect (tep);
321 transport_close (transport_proto_t tp, u32 conn_index, u8 thread_index)
323 tp_vfts[tp].close (conn_index, thread_index);
327 transport_reset (transport_proto_t tp, u32 conn_index, u8 thread_index)
329 if (tp_vfts[tp].reset)
330 tp_vfts[tp].reset (conn_index, thread_index);
332 tp_vfts[tp].close (conn_index, thread_index);
336 transport_start_listen (transport_proto_t tp, u32 session_index,
337 transport_endpoint_t * tep)
339 return tp_vfts[tp].start_listen (session_index, tep);
343 transport_stop_listen (transport_proto_t tp, u32 conn_index)
345 return tp_vfts[tp].stop_listen (conn_index);
349 transport_protocol_is_cl (transport_proto_t tp)
351 return (tp_vfts[tp].transport_options.service_type == TRANSPORT_SERVICE_CL);
355 default_get_transport_endpoint (transport_connection_t * tc,
356 transport_endpoint_t * tep, u8 is_lcl)
360 tep->port = tc->lcl_port;
361 tep->is_ip4 = tc->is_ip4;
362 clib_memcpy_fast (&tep->ip, &tc->lcl_ip, sizeof (tc->lcl_ip));
366 tep->port = tc->rmt_port;
367 tep->is_ip4 = tc->is_ip4;
368 clib_memcpy_fast (&tep->ip, &tc->rmt_ip, sizeof (tc->rmt_ip));
373 transport_get_endpoint (transport_proto_t tp, u32 conn_index,
374 u32 thread_index, transport_endpoint_t * tep,
377 if (tp_vfts[tp].get_transport_endpoint)
378 tp_vfts[tp].get_transport_endpoint (conn_index, thread_index, tep,
382 transport_connection_t *tc;
383 tc = transport_get_connection (tp, conn_index, thread_index);
384 default_get_transport_endpoint (tc, tep, is_lcl);
389 transport_get_listener_endpoint (transport_proto_t tp, u32 conn_index,
390 transport_endpoint_t * tep, u8 is_lcl)
392 if (tp_vfts[tp].get_transport_listener_endpoint)
393 tp_vfts[tp].get_transport_listener_endpoint (conn_index, tep, is_lcl);
396 transport_connection_t *tc;
397 tc = transport_get_listener (tp, conn_index);
398 default_get_transport_endpoint (tc, tep, is_lcl);
402 #define PORT_MASK ((1 << 16)- 1)
405 transport_endpoint_del (u32 tepi)
407 clib_spinlock_lock_if_init (&local_endpoints_lock);
408 pool_put_index (local_endpoints, tepi);
409 clib_spinlock_unlock_if_init (&local_endpoints_lock);
412 always_inline local_endpoint_t *
413 transport_endpoint_new (void)
415 local_endpoint_t *lep;
416 pool_get_zero (local_endpoints, lep);
421 transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port)
423 local_endpoint_t *lep;
426 /* Cleanup local endpoint if this was an active connect */
427 lepi = transport_endpoint_lookup (&local_endpoints_table, proto, lcl_ip,
428 clib_net_to_host_u16 (port));
429 if (lepi != ENDPOINT_INVALID_INDEX)
431 lep = pool_elt_at_index (local_endpoints, lepi);
432 if (!clib_atomic_sub_fetch (&lep->refcnt, 1))
434 transport_endpoint_table_del (&local_endpoints_table, proto,
436 transport_endpoint_del (lepi);
442 transport_endpoint_mark_used (u8 proto, ip46_address_t * ip, u16 port)
444 local_endpoint_t *lep;
445 clib_spinlock_lock_if_init (&local_endpoints_lock);
446 lep = transport_endpoint_new ();
447 clib_memcpy_fast (&lep->ep.ip, ip, sizeof (*ip));
450 transport_endpoint_table_add (&local_endpoints_table, proto, &lep->ep,
451 lep - local_endpoints);
452 clib_spinlock_unlock_if_init (&local_endpoints_lock);
456 transport_share_local_endpoint (u8 proto, ip46_address_t * lcl_ip, u16 port)
458 local_endpoint_t *lep;
461 lepi = transport_endpoint_lookup (&local_endpoints_table, proto, lcl_ip,
462 clib_net_to_host_u16 (port));
463 if (lepi != ENDPOINT_INVALID_INDEX)
465 lep = pool_elt_at_index (local_endpoints, lepi);
466 clib_atomic_add_fetch (&lep->refcnt, 1);
471 * Allocate local port and add if successful add entry to local endpoint
472 * table to mark the pair as used.
475 transport_alloc_local_port (u8 proto, ip46_address_t * ip)
477 u16 min = 1024, max = 65535; /* XXX configurable ? */
483 /* Only support active opens from thread 0 */
484 ASSERT (vlib_get_thread_index () == 0);
486 /* Search for first free slot */
487 for (tries = 0; tries < limit; tries++)
491 /* Find a port in the specified range */
494 port = random_u32 (&port_allocator_seed) & PORT_MASK;
495 if (PREDICT_TRUE (port >= min && port < max))
499 /* Look it up. If not found, we're done */
500 tei = transport_endpoint_lookup (&local_endpoints_table, proto, ip,
502 if (tei == ENDPOINT_INVALID_INDEX)
504 transport_endpoint_mark_used (proto, ip, port);
511 static session_error_t
512 transport_get_interface_ip (u32 sw_if_index, u8 is_ip4, ip46_address_t * addr)
517 ip4 = ip_interface_get_first_ip (sw_if_index, 1);
519 return SESSION_E_NOIP;
520 addr->ip4.as_u32 = ip4->as_u32;
525 ip6 = ip_interface_get_first_ip (sw_if_index, 0);
527 return SESSION_E_NOIP;
528 clib_memcpy_fast (&addr->ip6, ip6, sizeof (*ip6));
533 static session_error_t
534 transport_find_local_ip_for_remote (u32 sw_if_index,
535 transport_endpoint_t * rmt,
536 ip46_address_t * lcl_addr)
538 fib_node_index_t fei;
541 if (sw_if_index == ENDPOINT_INVALID_INDEX)
543 /* Find a FIB path to the destination */
544 clib_memcpy_fast (&prefix.fp_addr, &rmt->ip, sizeof (rmt->ip));
545 prefix.fp_proto = rmt->is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
546 prefix.fp_len = rmt->is_ip4 ? 32 : 128;
548 ASSERT (rmt->fib_index != ENDPOINT_INVALID_INDEX);
549 fei = fib_table_lookup (rmt->fib_index, &prefix);
551 /* Couldn't find route to destination. Bail out. */
552 if (fei == FIB_NODE_INDEX_INVALID)
553 return SESSION_E_NOROUTE;
555 sw_if_index = fib_entry_get_resolving_interface (fei);
556 if (sw_if_index == ENDPOINT_INVALID_INDEX)
557 return SESSION_E_NOINTF;
560 clib_memset (lcl_addr, 0, sizeof (*lcl_addr));
561 return transport_get_interface_ip (sw_if_index, rmt->is_ip4, lcl_addr);
565 transport_alloc_local_endpoint (u8 proto, transport_endpoint_cfg_t * rmt_cfg,
566 ip46_address_t * lcl_addr, u16 * lcl_port)
568 transport_endpoint_t *rmt = (transport_endpoint_t *) rmt_cfg;
569 session_error_t error;
574 * Find the local address
576 if (ip_is_zero (&rmt_cfg->peer.ip, rmt_cfg->peer.is_ip4))
578 error = transport_find_local_ip_for_remote (rmt_cfg->peer.sw_if_index,
585 /* Assume session layer vetted this address */
586 clib_memcpy_fast (lcl_addr, &rmt_cfg->peer.ip,
587 sizeof (rmt_cfg->peer.ip));
591 * Allocate source port
593 if (rmt_cfg->peer.port == 0)
595 port = transport_alloc_local_port (proto, lcl_addr);
597 return SESSION_E_NOPORT;
602 port = clib_net_to_host_u16 (rmt_cfg->peer.port);
604 tei = transport_endpoint_lookup (&local_endpoints_table, proto,
606 if (tei != ENDPOINT_INVALID_INDEX)
607 return SESSION_E_PORTINUSE;
609 transport_endpoint_mark_used (proto, lcl_addr, port);
616 format_clib_us_time (u8 * s, va_list * args)
618 clib_us_time_t t = va_arg (*args, clib_us_time_t);
620 s = format (s, "%u us", t);
622 s = format (s, "%.3f s", (f64) t * CLIB_US_TIME_PERIOD);
627 format_transport_pacer (u8 * s, va_list * args)
629 spacer_t *pacer = va_arg (*args, spacer_t *);
630 u32 thread_index = va_arg (*args, int);
631 clib_us_time_t now, diff;
633 now = transport_us_time_now (thread_index);
634 diff = now - pacer->last_update;
635 s = format (s, "rate %lu bucket %ld t/p %.3f last_update %U burst %u",
636 pacer->bytes_per_sec, pacer->bucket, pacer->tokens_per_period,
637 format_clib_us_time, diff, pacer->max_burst);
642 spacer_max_burst (spacer_t * pacer, clib_us_time_t time_now)
644 u64 n_periods = (time_now - pacer->last_update);
647 if ((inc = (f32) n_periods * pacer->tokens_per_period) > 10)
649 pacer->last_update = time_now;
650 pacer->bucket = clib_min (pacer->bucket + inc, pacer->max_burst);
653 return pacer->bucket > 0 ? pacer->max_burst : 0;
657 spacer_update_bucket (spacer_t * pacer, u32 bytes)
659 pacer->bucket -= bytes;
663 spacer_set_pace_rate (spacer_t * pacer, u64 rate_bytes_per_sec,
664 clib_us_time_t rtt, clib_time_type_t sec_per_loop)
666 clib_us_time_t max_time;
668 ASSERT (rate_bytes_per_sec != 0);
669 pacer->bytes_per_sec = rate_bytes_per_sec;
670 pacer->tokens_per_period = rate_bytes_per_sec * CLIB_US_TIME_PERIOD;
672 /* Allow a min number of bursts per rtt, if their size is acceptable. Goal
673 * is to spread the sending of data over the rtt but to also allow for some
674 * coalescing that can potentially
675 * 1) reduce load on session layer by reducing scheduling frequency for a
677 * 2) optimize sending when tso if available
679 * Max "time-length" of a burst cannot be less than 1us or more than 1ms.
681 max_time = clib_max (rtt / TRANSPORT_PACER_BURSTS_PER_RTT,
682 (clib_us_time_t) (sec_per_loop * CLIB_US_TIME_FREQ));
683 max_time = clib_clamp (max_time, 1 /* 1us */ , 1000 /* 1ms */ );
684 pacer->max_burst = (rate_bytes_per_sec * max_time) * CLIB_US_TIME_PERIOD;
685 pacer->max_burst = clib_clamp (pacer->max_burst, TRANSPORT_PACER_MIN_BURST,
686 TRANSPORT_PACER_MAX_BURST);
690 spacer_pace_rate (spacer_t * pacer)
692 return pacer->bytes_per_sec;
696 spacer_reset (spacer_t * pacer, clib_us_time_t time_now, u64 bucket)
698 pacer->last_update = time_now;
699 pacer->bucket = bucket;
703 transport_connection_tx_pacer_reset (transport_connection_t * tc,
704 u64 rate_bytes_per_sec, u32 start_bucket,
707 spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec, rtt,
708 transport_seconds_per_loop (tc->thread_index));
709 spacer_reset (&tc->pacer, transport_us_time_now (tc->thread_index),
714 transport_connection_tx_pacer_reset_bucket (transport_connection_t * tc,
717 spacer_reset (&tc->pacer, transport_us_time_now (tc->thread_index), bucket);
721 transport_connection_tx_pacer_init (transport_connection_t * tc,
722 u64 rate_bytes_per_sec,
725 tc->flags |= TRANSPORT_CONNECTION_F_IS_TX_PACED;
726 transport_connection_tx_pacer_reset (tc, rate_bytes_per_sec,
727 initial_bucket, 1e6);
731 transport_connection_tx_pacer_update (transport_connection_t * tc,
732 u64 bytes_per_sec, clib_us_time_t rtt)
734 spacer_set_pace_rate (&tc->pacer, bytes_per_sec, rtt,
735 transport_seconds_per_loop (tc->thread_index));
739 transport_connection_tx_pacer_burst (transport_connection_t * tc)
741 return spacer_max_burst (&tc->pacer,
742 transport_us_time_now (tc->thread_index));
746 transport_connection_tx_pacer_rate (transport_connection_t * tc)
748 return spacer_pace_rate (&tc->pacer);
752 transport_connection_update_tx_bytes (transport_connection_t * tc, u32 bytes)
754 if (transport_connection_is_tx_paced (tc))
755 spacer_update_bucket (&tc->pacer, bytes);
759 transport_connection_tx_pacer_update_bytes (transport_connection_t * tc,
762 spacer_update_bucket (&tc->pacer, bytes);
766 transport_update_pacer_time (u32 thread_index, clib_time_type_t now)
768 session_wrk_update_time (session_main_get_worker (thread_index), now);
772 transport_connection_reschedule (transport_connection_t * tc)
774 tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED;
775 transport_connection_tx_pacer_reset_bucket (tc, TRANSPORT_PACER_MIN_BURST);
776 if (transport_max_tx_dequeue (tc))
777 sesssion_reschedule_tx (tc);
780 session_t *s = session_get (tc->s_index, tc->thread_index);
781 svm_fifo_unset_event (s->tx_fifo);
782 if (svm_fifo_max_dequeue_cons (s->tx_fifo))
783 if (svm_fifo_set_event (s->tx_fifo))
784 sesssion_reschedule_tx (tc);
789 transport_fifos_init_ooo (transport_connection_t * tc)
791 session_t *s = session_get (tc->s_index, tc->thread_index);
792 svm_fifo_init_ooo_lookup (s->rx_fifo, 0 /* ooo enq */ );
793 svm_fifo_init_ooo_lookup (s->tx_fifo, 1 /* ooo deq */ );
797 transport_update_time (clib_time_type_t time_now, u8 thread_index)
799 transport_proto_vft_t *vft;
800 vec_foreach (vft, tp_vfts)
802 if (vft->update_time)
803 (vft->update_time) (time_now, thread_index);
808 transport_enable_disable (vlib_main_t * vm, u8 is_en)
810 transport_proto_vft_t *vft;
811 vec_foreach (vft, tp_vfts)
814 (vft->enable) (vm, is_en);
819 transport_init (void)
821 vlib_thread_main_t *vtm = vlib_get_thread_main ();
822 session_main_t *smm = vnet_get_session_main ();
825 if (smm->local_endpoints_table_buckets == 0)
826 smm->local_endpoints_table_buckets = 250000;
827 if (smm->local_endpoints_table_memory == 0)
828 smm->local_endpoints_table_memory = 512 << 20;
830 /* Initialize [port-allocator] random number seed */
831 port_allocator_seed = (u32) clib_cpu_time_now ();
833 clib_bihash_init_24_8 (&local_endpoints_table, "local endpoints table",
834 smm->local_endpoints_table_buckets,
835 smm->local_endpoints_table_memory);
836 num_threads = 1 /* main thread */ + vtm->n_threads;
838 clib_spinlock_init (&local_endpoints_lock);
842 * fd.io coding-style-patch-verification: ON
845 * eval: (c-set-style "gnu")