Line data Source code
1 : /*
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:
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 <math.h>
17 : #include <vlib/vlib.h>
18 : #include <vnet/vnet.h>
19 : #include <vppinfra/elog.h>
20 : #include <vnet/session/transport.h>
21 : #include <vnet/session/session.h>
22 : #include <vnet/session/application.h>
23 : #include <vnet/session/application_interface.h>
24 : #include <vnet/session/application_local.h>
25 : #include <vnet/session/session_debug.h>
26 : #include <svm/queue.h>
27 : #include <sys/timerfd.h>
28 :
29 : static inline void
30 4 : session_wrk_send_evt_to_main (session_worker_t *wrk, session_evt_elt_t *elt)
31 : {
32 : session_evt_elt_t *he;
33 : uword thread_index;
34 : u8 is_empty;
35 :
36 4 : thread_index = wrk->vm->thread_index;
37 4 : he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main);
38 4 : is_empty = clib_llist_is_empty (wrk->event_elts, evt_list, he);
39 4 : clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
40 4 : if (is_empty)
41 4 : session_send_rpc_evt_to_thread (0, session_wrk_handle_evts_main_rpc,
42 : uword_to_pointer (thread_index, void *));
43 4 : }
44 :
45 : #define app_check_thread_and_barrier(_wrk, _elt) \
46 : if (!vlib_thread_is_main_w_barrier ()) \
47 : { \
48 : session_wrk_send_evt_to_main (wrk, elt); \
49 : return; \
50 : }
51 :
52 : static void
53 30 : session_wrk_timerfd_update (session_worker_t *wrk, u64 time_ns)
54 : {
55 : struct itimerspec its;
56 :
57 30 : its.it_value.tv_sec = 0;
58 30 : its.it_value.tv_nsec = time_ns;
59 30 : its.it_interval.tv_sec = 0;
60 30 : its.it_interval.tv_nsec = its.it_value.tv_nsec;
61 :
62 30 : if (timerfd_settime (wrk->timerfd, 0, &its, NULL) == -1)
63 0 : clib_warning ("timerfd_settime");
64 30 : }
65 :
66 : always_inline u64
67 30 : session_wrk_tfd_timeout (session_wrk_state_t state, u32 thread_index)
68 : {
69 30 : if (state == SESSION_WRK_INTERRUPT)
70 16 : return thread_index ? 1e6 : vlib_num_workers () ? 5e8 : 1e6;
71 14 : else if (state == SESSION_WRK_IDLE)
72 4 : return thread_index ? 1e8 : vlib_num_workers () ? 5e8 : 1e8;
73 : else
74 10 : return 0;
75 : }
76 :
77 : static inline void
78 30 : session_wrk_set_state (session_worker_t *wrk, session_wrk_state_t state)
79 : {
80 : u64 time_ns;
81 :
82 30 : wrk->state = state;
83 30 : if (wrk->timerfd == -1)
84 0 : return;
85 30 : time_ns = session_wrk_tfd_timeout (state, wrk->vm->thread_index);
86 30 : session_wrk_timerfd_update (wrk, time_ns);
87 : }
88 :
89 : static transport_endpt_ext_cfg_t *
90 12 : session_mq_get_ext_config (application_t *app, uword offset)
91 : {
92 : svm_fifo_chunk_t *c;
93 : fifo_segment_t *fs;
94 :
95 12 : fs = application_get_rx_mqs_segment (app);
96 12 : c = fs_chunk_ptr (fs->h, offset);
97 12 : return (transport_endpt_ext_cfg_t *) c->data;
98 : }
99 :
100 : static void
101 12 : session_mq_free_ext_config (application_t *app, uword offset)
102 : {
103 : svm_fifo_chunk_t *c;
104 : fifo_segment_t *fs;
105 :
106 12 : fs = application_get_rx_mqs_segment (app);
107 12 : c = fs_chunk_ptr (fs->h, offset);
108 12 : fifo_segment_collect_chunk (fs, 0 /* only one slice */, c);
109 12 : }
110 :
111 : static void
112 45 : session_mq_listen_handler (session_worker_t *wrk, session_evt_elt_t *elt)
113 : {
114 45 : vnet_listen_args_t _a, *a = &_a;
115 : session_listen_msg_t *mp;
116 : app_worker_t *app_wrk;
117 : application_t *app;
118 : int rv;
119 :
120 45 : app_check_thread_and_barrier (wrk, elt);
121 :
122 43 : mp = session_evt_ctrl_data (wrk, elt);
123 43 : app = application_lookup (mp->client_index);
124 43 : if (!app)
125 0 : return;
126 :
127 43 : clib_memset (a, 0, sizeof (*a));
128 43 : a->sep.is_ip4 = mp->is_ip4;
129 43 : ip_copy (&a->sep.ip, &mp->ip, mp->is_ip4);
130 43 : a->sep.port = mp->port;
131 43 : a->sep.fib_index = mp->vrf;
132 43 : a->sep.sw_if_index = ENDPOINT_INVALID_INDEX;
133 43 : a->sep.transport_proto = mp->proto;
134 43 : a->app_index = app->app_index;
135 43 : a->wrk_map_index = mp->wrk_index;
136 43 : a->sep_ext.transport_flags = mp->flags;
137 :
138 43 : if (mp->ext_config)
139 5 : a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config);
140 :
141 43 : if ((rv = vnet_listen (a)))
142 0 : session_worker_stat_error_inc (wrk, rv, 1);
143 :
144 43 : app_wrk = application_get_worker (app, mp->wrk_index);
145 43 : mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
146 :
147 43 : if (mp->ext_config)
148 5 : session_mq_free_ext_config (app, mp->ext_config);
149 : }
150 :
151 : static void
152 0 : session_mq_listen_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
153 : {
154 0 : vnet_listen_args_t _a, *a = &_a;
155 : session_listen_uri_msg_t *mp;
156 : app_worker_t *app_wrk;
157 : application_t *app;
158 : int rv;
159 :
160 0 : app_check_thread_and_barrier (wrk, elt);
161 :
162 0 : mp = session_evt_ctrl_data (wrk, elt);
163 0 : app = application_lookup (mp->client_index);
164 0 : if (!app)
165 0 : return;
166 :
167 0 : clib_memset (a, 0, sizeof (*a));
168 0 : a->uri = (char *) mp->uri;
169 0 : a->app_index = app->app_index;
170 0 : rv = vnet_bind_uri (a);
171 :
172 0 : app_wrk = application_get_worker (app, 0);
173 0 : mq_send_session_bound_cb (app_wrk->wrk_index, mp->context, a->handle, rv);
174 : }
175 :
176 : static void
177 51 : session_mq_connect_one (session_connect_msg_t *mp)
178 : {
179 51 : vnet_connect_args_t _a, *a = &_a;
180 : app_worker_t *app_wrk;
181 : session_worker_t *wrk;
182 : application_t *app;
183 : int rv;
184 :
185 51 : app = application_lookup (mp->client_index);
186 51 : if (!app)
187 0 : return;
188 :
189 51 : clib_memset (a, 0, sizeof (*a));
190 51 : a->sep.is_ip4 = mp->is_ip4;
191 51 : clib_memcpy_fast (&a->sep.ip, &mp->ip, sizeof (mp->ip));
192 51 : a->sep.port = mp->port;
193 51 : a->sep.transport_proto = mp->proto;
194 51 : a->sep.peer.fib_index = mp->vrf;
195 51 : a->sep.dscp = mp->dscp;
196 51 : clib_memcpy_fast (&a->sep.peer.ip, &mp->lcl_ip, sizeof (mp->lcl_ip));
197 51 : if (mp->is_ip4)
198 : {
199 47 : ip46_address_mask_ip4 (&a->sep.ip);
200 47 : ip46_address_mask_ip4 (&a->sep.peer.ip);
201 : }
202 51 : a->sep.peer.port = mp->lcl_port;
203 51 : a->sep.peer.sw_if_index = ENDPOINT_INVALID_INDEX;
204 51 : a->sep_ext.parent_handle = mp->parent_handle;
205 51 : a->sep_ext.transport_flags = mp->flags;
206 51 : a->api_context = mp->context;
207 51 : a->app_index = app->app_index;
208 51 : a->wrk_map_index = mp->wrk_index;
209 :
210 51 : if (mp->ext_config)
211 7 : a->sep_ext.ext_cfg = session_mq_get_ext_config (app, mp->ext_config);
212 :
213 51 : if ((rv = vnet_connect (a)))
214 : {
215 0 : wrk = session_main_get_worker (vlib_get_thread_index ());
216 0 : session_worker_stat_error_inc (wrk, rv, 1);
217 0 : app_wrk = application_get_worker (app, mp->wrk_index);
218 0 : mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
219 : }
220 :
221 51 : if (mp->ext_config)
222 7 : session_mq_free_ext_config (app, mp->ext_config);
223 : }
224 :
225 : static void
226 51 : session_mq_handle_connects_rpc (void *arg)
227 : {
228 51 : u32 max_connects = 32, n_connects = 0;
229 : session_evt_elt_t *he, *elt, *next;
230 : session_worker_t *fwrk;
231 :
232 51 : ASSERT (session_vlib_thread_is_cl_thread ());
233 :
234 : /* Pending connects on linked list pertaining to first worker */
235 51 : fwrk = session_main_get_worker (transport_cl_thread ());
236 51 : if (!fwrk->n_pending_connects)
237 0 : return;
238 :
239 51 : he = clib_llist_elt (fwrk->event_elts, fwrk->pending_connects);
240 51 : elt = clib_llist_next (fwrk->event_elts, evt_list, he);
241 :
242 : /* Avoid holding the worker for too long */
243 102 : while (n_connects < max_connects && elt != he)
244 : {
245 51 : next = clib_llist_next (fwrk->event_elts, evt_list, elt);
246 51 : clib_llist_remove (fwrk->event_elts, evt_list, elt);
247 51 : session_mq_connect_one (session_evt_ctrl_data (fwrk, elt));
248 51 : session_evt_ctrl_data_free (fwrk, elt);
249 51 : clib_llist_put (fwrk->event_elts, elt);
250 51 : elt = next;
251 51 : n_connects += 1;
252 : }
253 :
254 : /* Decrement with worker barrier */
255 51 : fwrk->n_pending_connects -= n_connects;
256 51 : if (fwrk->n_pending_connects > 0)
257 : {
258 0 : session_send_rpc_evt_to_thread_force (fwrk->vm->thread_index,
259 : session_mq_handle_connects_rpc, 0);
260 : }
261 : }
262 :
263 : static void
264 51 : session_mq_connect_handler (session_worker_t *wrk, session_evt_elt_t *elt)
265 : {
266 51 : u32 thread_index = wrk - session_main.wrk;
267 : session_evt_elt_t *he;
268 :
269 51 : if (PREDICT_FALSE (thread_index > transport_cl_thread ()))
270 : {
271 0 : clib_warning ("Connect on wrong thread. Dropping");
272 0 : return;
273 : }
274 :
275 : /* If on worker, check if main has any pending messages. Avoids reordering
276 : * with other control messages that need to be handled by main
277 : */
278 51 : if (thread_index)
279 : {
280 4 : he = clib_llist_elt (wrk->event_elts, wrk->evts_pending_main);
281 :
282 : /* Events pending on main, postpone to avoid reordering */
283 4 : if (!clib_llist_is_empty (wrk->event_elts, evt_list, he))
284 : {
285 0 : clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
286 0 : return;
287 : }
288 : }
289 :
290 : /* Add to pending list to be handled by first worker */
291 51 : he = clib_llist_elt (wrk->event_elts, wrk->pending_connects);
292 51 : clib_llist_add_tail (wrk->event_elts, evt_list, elt, he);
293 :
294 : /* Decremented with worker barrier */
295 51 : wrk->n_pending_connects += 1;
296 51 : if (wrk->n_pending_connects == 1)
297 : {
298 51 : session_send_rpc_evt_to_thread_force (thread_index,
299 : session_mq_handle_connects_rpc, 0);
300 : }
301 : }
302 :
303 : static void
304 0 : session_mq_connect_uri_handler (session_worker_t *wrk, session_evt_elt_t *elt)
305 : {
306 0 : vnet_connect_args_t _a, *a = &_a;
307 : session_connect_uri_msg_t *mp;
308 : app_worker_t *app_wrk;
309 : application_t *app;
310 : int rv;
311 :
312 0 : app_check_thread_and_barrier (wrk, elt);
313 :
314 0 : mp = session_evt_ctrl_data (wrk, elt);
315 0 : app = application_lookup (mp->client_index);
316 0 : if (!app)
317 0 : return;
318 :
319 0 : clib_memset (a, 0, sizeof (*a));
320 0 : a->uri = (char *) mp->uri;
321 0 : a->api_context = mp->context;
322 0 : a->app_index = app->app_index;
323 0 : if ((rv = vnet_connect_uri (a)))
324 : {
325 0 : session_worker_stat_error_inc (wrk, rv, 1);
326 0 : app_wrk = application_get_worker (app, 0 /* default wrk only */ );
327 0 : mq_send_session_connected_cb (app_wrk->wrk_index, mp->context, 0, rv);
328 : }
329 : }
330 :
331 : static void
332 0 : session_mq_shutdown_handler (void *data)
333 : {
334 0 : session_shutdown_msg_t *mp = (session_shutdown_msg_t *) data;
335 0 : vnet_shutdown_args_t _a, *a = &_a;
336 : application_t *app;
337 :
338 0 : app = application_lookup (mp->client_index);
339 0 : if (!app)
340 0 : return;
341 :
342 0 : a->app_index = app->app_index;
343 0 : a->handle = mp->handle;
344 0 : vnet_shutdown_session (a);
345 : }
346 :
347 : static void
348 61 : session_mq_disconnect_handler (void *data)
349 : {
350 61 : session_disconnect_msg_t *mp = (session_disconnect_msg_t *) data;
351 61 : vnet_disconnect_args_t _a, *a = &_a;
352 : application_t *app;
353 :
354 61 : app = application_lookup (mp->client_index);
355 61 : if (!app)
356 0 : return;
357 :
358 61 : a->app_index = app->app_index;
359 61 : a->handle = mp->handle;
360 61 : vnet_disconnect_session (a);
361 : }
362 :
363 : static void
364 24 : app_mq_detach_handler (session_worker_t *wrk, session_evt_elt_t *elt)
365 : {
366 24 : vnet_app_detach_args_t _a, *a = &_a;
367 : session_app_detach_msg_t *mp;
368 : application_t *app;
369 :
370 26 : app_check_thread_and_barrier (wrk, elt);
371 :
372 24 : mp = session_evt_ctrl_data (wrk, elt);
373 24 : app = application_lookup (mp->client_index);
374 24 : if (!app)
375 2 : return;
376 :
377 22 : a->app_index = app->app_index;
378 22 : a->api_client_index = mp->client_index;
379 22 : vnet_application_detach (a);
380 : }
381 :
382 : static void
383 27 : session_mq_unlisten_handler (session_worker_t *wrk, session_evt_elt_t *elt)
384 : {
385 27 : vnet_unlisten_args_t _a, *a = &_a;
386 : session_unlisten_msg_t *mp;
387 : app_worker_t *app_wrk;
388 : session_handle_t sh;
389 : application_t *app;
390 : int rv;
391 :
392 28 : app_check_thread_and_barrier (wrk, elt);
393 :
394 25 : mp = session_evt_ctrl_data (wrk, elt);
395 25 : sh = mp->handle;
396 :
397 25 : app = application_lookup (mp->client_index);
398 25 : if (!app)
399 1 : return;
400 :
401 24 : clib_memset (a, 0, sizeof (*a));
402 24 : a->app_index = app->app_index;
403 24 : a->handle = sh;
404 24 : a->wrk_map_index = mp->wrk_index;
405 :
406 24 : if ((rv = vnet_unlisten (a)))
407 0 : session_worker_stat_error_inc (wrk, rv, 1);
408 :
409 24 : app_wrk = application_get_worker (app, a->wrk_map_index);
410 24 : if (!app_wrk)
411 0 : return;
412 :
413 24 : mq_send_unlisten_reply (app_wrk, sh, mp->context, rv);
414 : }
415 :
416 : static void
417 47 : session_mq_accepted_reply_handler (session_worker_t *wrk,
418 : session_evt_elt_t *elt)
419 : {
420 47 : vnet_disconnect_args_t _a = { 0 }, *a = &_a;
421 : session_accepted_reply_msg_t *mp;
422 : session_state_t old_state;
423 : app_worker_t *app_wrk;
424 : session_t *s;
425 :
426 47 : mp = session_evt_ctrl_data (wrk, elt);
427 :
428 : /* Mail this back from the main thread. We're not polling in main
429 : * thread so we're using other workers for notifications. */
430 47 : if (session_thread_from_handle (mp->handle) == 0 && vlib_num_workers () &&
431 0 : vlib_get_thread_index () != 0)
432 : {
433 0 : session_wrk_send_evt_to_main (wrk, elt);
434 12 : return;
435 : }
436 :
437 47 : s = session_get_from_handle_if_valid (mp->handle);
438 47 : if (!s)
439 0 : return;
440 :
441 47 : app_wrk = app_worker_get (s->app_wrk_index);
442 47 : if (app_wrk->app_index != mp->context)
443 : {
444 0 : clib_warning ("app doesn't own session");
445 0 : return;
446 : }
447 :
448 : /* Server isn't interested, disconnect the session */
449 47 : if (mp->retval)
450 : {
451 0 : a->app_index = mp->context;
452 0 : a->handle = mp->handle;
453 0 : vnet_disconnect_session (a);
454 0 : return;
455 : }
456 :
457 : /* Special handling for cut-through sessions */
458 47 : if (!session_has_transport (s))
459 : {
460 12 : session_set_state (s, SESSION_STATE_READY);
461 12 : ct_session_connect_notify (s, SESSION_E_NONE);
462 12 : return;
463 : }
464 :
465 35 : old_state = s->session_state;
466 35 : session_set_state (s, SESSION_STATE_READY);
467 :
468 35 : if (!svm_fifo_is_empty_prod (s->rx_fifo))
469 2 : app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
470 :
471 : /* Closed while waiting for app to reply. Resend disconnect */
472 35 : if (old_state >= SESSION_STATE_TRANSPORT_CLOSING)
473 : {
474 0 : app_worker_close_notify (app_wrk, s);
475 0 : session_set_state (s, old_state);
476 0 : return;
477 : }
478 : }
479 :
480 : static void
481 4 : session_mq_reset_reply_handler (void *data)
482 : {
483 4 : vnet_disconnect_args_t _a = { 0 }, *a = &_a;
484 : session_reset_reply_msg_t *mp;
485 : app_worker_t *app_wrk;
486 : session_t *s;
487 : application_t *app;
488 : u32 index, thread_index;
489 :
490 4 : mp = (session_reset_reply_msg_t *) data;
491 4 : app = application_lookup (mp->context);
492 4 : if (!app)
493 0 : return;
494 :
495 4 : session_parse_handle (mp->handle, &index, &thread_index);
496 4 : s = session_get_if_valid (index, thread_index);
497 :
498 : /* No session or not the right session */
499 4 : if (!s || s->session_state < SESSION_STATE_TRANSPORT_CLOSING)
500 0 : return;
501 :
502 4 : app_wrk = app_worker_get (s->app_wrk_index);
503 4 : if (!app_wrk || app_wrk->app_index != app->app_index)
504 : {
505 0 : clib_warning ("App %u does not own handle 0x%lx!", app->app_index,
506 : mp->handle);
507 0 : return;
508 : }
509 :
510 : /* Client objected to resetting the session, log and continue */
511 4 : if (mp->retval)
512 : {
513 0 : clib_warning ("client retval %d", mp->retval);
514 0 : return;
515 : }
516 :
517 : /* This comes as a response to a reset, transport only waiting for
518 : * confirmation to remove connection state, no need to disconnect */
519 4 : a->handle = mp->handle;
520 4 : a->app_index = app->app_index;
521 4 : vnet_disconnect_session (a);
522 : }
523 :
524 : static void
525 0 : session_mq_disconnected_handler (void *data)
526 : {
527 : session_disconnected_reply_msg_t *rmp;
528 0 : vnet_disconnect_args_t _a, *a = &_a;
529 0 : svm_msg_q_msg_t _msg, *msg = &_msg;
530 : session_disconnected_msg_t *mp;
531 : app_worker_t *app_wrk;
532 : session_event_t *evt;
533 : session_t *s;
534 : application_t *app;
535 0 : int rv = 0;
536 :
537 0 : mp = (session_disconnected_msg_t *) data;
538 0 : if (!(s = session_get_from_handle_if_valid (mp->handle)))
539 : {
540 0 : clib_warning ("could not disconnect handle %llu", mp->handle);
541 0 : return;
542 : }
543 0 : app_wrk = app_worker_get (s->app_wrk_index);
544 0 : app = application_lookup (mp->client_index);
545 0 : if (!(app_wrk && app && app->app_index == app_wrk->app_index))
546 : {
547 0 : clib_warning ("could not disconnect session: %llu app: %u",
548 : mp->handle, mp->client_index);
549 0 : return;
550 : }
551 :
552 0 : a->handle = mp->handle;
553 0 : a->app_index = app_wrk->wrk_index;
554 0 : rv = vnet_disconnect_session (a);
555 :
556 0 : svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
557 : SESSION_MQ_CTRL_EVT_RING,
558 : SVM_Q_WAIT, msg);
559 0 : evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
560 0 : clib_memset (evt, 0, sizeof (*evt));
561 0 : evt->event_type = SESSION_CTRL_EVT_DISCONNECTED_REPLY;
562 0 : rmp = (session_disconnected_reply_msg_t *) evt->data;
563 0 : rmp->handle = mp->handle;
564 0 : rmp->context = mp->context;
565 0 : rmp->retval = rv;
566 0 : svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
567 : }
568 :
569 : static void
570 13 : session_mq_disconnected_reply_handler (void *data)
571 : {
572 : session_disconnected_reply_msg_t *mp;
573 13 : vnet_disconnect_args_t _a, *a = &_a;
574 : application_t *app;
575 :
576 13 : mp = (session_disconnected_reply_msg_t *) data;
577 :
578 : /* Client objected to disconnecting the session, log and continue */
579 13 : if (mp->retval)
580 : {
581 0 : clib_warning ("client retval %d", mp->retval);
582 0 : return;
583 : }
584 :
585 : /* Disconnect has been confirmed. Confirm close to transport */
586 13 : app = application_lookup (mp->context);
587 13 : if (app)
588 : {
589 13 : a->handle = mp->handle;
590 13 : a->app_index = app->app_index;
591 13 : vnet_disconnect_session (a);
592 : }
593 : }
594 :
595 : static void
596 0 : session_mq_worker_update_handler (void *data)
597 : {
598 0 : session_worker_update_msg_t *mp = (session_worker_update_msg_t *) data;
599 : session_worker_update_reply_msg_t *rmp;
600 0 : svm_msg_q_msg_t _msg, *msg = &_msg;
601 : app_worker_t *app_wrk;
602 : u32 owner_app_wrk_map;
603 : session_event_t *evt;
604 : session_t *s;
605 : application_t *app;
606 : int rv;
607 :
608 0 : app = application_lookup (mp->client_index);
609 0 : if (!app)
610 0 : return;
611 0 : if (!(s = session_get_from_handle_if_valid (mp->handle)))
612 : {
613 0 : clib_warning ("invalid handle %llu", mp->handle);
614 0 : return;
615 : }
616 0 : app_wrk = app_worker_get (s->app_wrk_index);
617 0 : if (app_wrk->app_index != app->app_index)
618 : {
619 0 : clib_warning ("app %u does not own session %llu", app->app_index,
620 : mp->handle);
621 0 : return;
622 : }
623 0 : owner_app_wrk_map = app_wrk->wrk_map_index;
624 0 : app_wrk = application_get_worker (app, mp->wrk_index);
625 :
626 : /* This needs to come from the new owner */
627 0 : if (mp->req_wrk_index == owner_app_wrk_map)
628 : {
629 : session_req_worker_update_msg_t *wump;
630 :
631 0 : svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
632 : SESSION_MQ_CTRL_EVT_RING,
633 : SVM_Q_WAIT, msg);
634 0 : evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
635 0 : clib_memset (evt, 0, sizeof (*evt));
636 0 : evt->event_type = SESSION_CTRL_EVT_REQ_WORKER_UPDATE;
637 0 : wump = (session_req_worker_update_msg_t *) evt->data;
638 0 : wump->session_handle = mp->handle;
639 0 : svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
640 0 : return;
641 : }
642 :
643 0 : rv = app_worker_own_session (app_wrk, s);
644 0 : if (rv)
645 0 : session_stat_error_inc (rv, 1);
646 :
647 : /*
648 : * Send reply
649 : */
650 0 : svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
651 : SESSION_MQ_CTRL_EVT_RING,
652 : SVM_Q_WAIT, msg);
653 0 : evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
654 0 : clib_memset (evt, 0, sizeof (*evt));
655 0 : evt->event_type = SESSION_CTRL_EVT_WORKER_UPDATE_REPLY;
656 0 : rmp = (session_worker_update_reply_msg_t *) evt->data;
657 0 : rmp->handle = mp->handle;
658 0 : if (s->rx_fifo)
659 0 : rmp->rx_fifo = fifo_segment_fifo_offset (s->rx_fifo);
660 0 : if (s->tx_fifo)
661 0 : rmp->tx_fifo = fifo_segment_fifo_offset (s->tx_fifo);
662 0 : rmp->segment_handle = session_segment_handle (s);
663 0 : svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
664 :
665 : /*
666 : * Retransmit messages that may have been lost
667 : */
668 0 : if (s->tx_fifo && !svm_fifo_is_empty (s->tx_fifo))
669 0 : session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
670 :
671 0 : if (s->rx_fifo && !svm_fifo_is_empty (s->rx_fifo))
672 0 : app_worker_lock_and_send_event (app_wrk, s, SESSION_IO_EVT_RX);
673 :
674 0 : if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSING)
675 0 : app_worker_close_notify (app_wrk, s);
676 : }
677 :
678 : static void
679 0 : session_mq_app_wrk_rpc_handler (void *data)
680 : {
681 0 : session_app_wrk_rpc_msg_t *mp = (session_app_wrk_rpc_msg_t *) data;
682 0 : svm_msg_q_msg_t _msg, *msg = &_msg;
683 : session_app_wrk_rpc_msg_t *rmp;
684 : app_worker_t *app_wrk;
685 : session_event_t *evt;
686 : application_t *app;
687 :
688 0 : app = application_lookup (mp->client_index);
689 0 : if (!app)
690 0 : return;
691 :
692 0 : app_wrk = application_get_worker (app, mp->wrk_index);
693 :
694 0 : svm_msg_q_lock_and_alloc_msg_w_ring (app_wrk->event_queue,
695 : SESSION_MQ_CTRL_EVT_RING, SVM_Q_WAIT,
696 : msg);
697 0 : evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
698 0 : clib_memset (evt, 0, sizeof (*evt));
699 0 : evt->event_type = SESSION_CTRL_EVT_APP_WRK_RPC;
700 0 : rmp = (session_app_wrk_rpc_msg_t *) evt->data;
701 0 : clib_memcpy (rmp->data, mp->data, sizeof (mp->data));
702 0 : svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
703 : }
704 :
705 : static void
706 5 : session_mq_transport_attr_handler (void *data)
707 : {
708 5 : session_transport_attr_msg_t *mp = (session_transport_attr_msg_t *) data;
709 : session_transport_attr_reply_msg_t *rmp;
710 5 : svm_msg_q_msg_t _msg, *msg = &_msg;
711 : app_worker_t *app_wrk;
712 : session_event_t *evt;
713 : application_t *app;
714 : session_t *s;
715 : int rv;
716 :
717 5 : app = application_lookup (mp->client_index);
718 5 : if (!app)
719 0 : return;
720 :
721 5 : if (!(s = session_get_from_handle_if_valid (mp->handle)))
722 : {
723 0 : clib_warning ("invalid handle %llu", mp->handle);
724 0 : return;
725 : }
726 5 : app_wrk = app_worker_get (s->app_wrk_index);
727 5 : if (app_wrk->app_index != app->app_index)
728 : {
729 0 : clib_warning ("app %u does not own session %llu", app->app_index,
730 : mp->handle);
731 0 : return;
732 : }
733 :
734 5 : rv = session_transport_attribute (s, mp->is_get, &mp->attr);
735 :
736 5 : svm_msg_q_lock_and_alloc_msg_w_ring (
737 : app_wrk->event_queue, SESSION_MQ_CTRL_EVT_RING, SVM_Q_WAIT, msg);
738 5 : evt = svm_msg_q_msg_data (app_wrk->event_queue, msg);
739 5 : clib_memset (evt, 0, sizeof (*evt));
740 5 : evt->event_type = SESSION_CTRL_EVT_TRANSPORT_ATTR_REPLY;
741 5 : rmp = (session_transport_attr_reply_msg_t *) evt->data;
742 5 : rmp->handle = mp->handle;
743 5 : rmp->retval = rv;
744 5 : rmp->is_get = mp->is_get;
745 5 : if (!rv && mp->is_get)
746 3 : rmp->attr = mp->attr;
747 5 : svm_msg_q_add_and_unlock (app_wrk->event_queue, msg);
748 : }
749 :
750 : void
751 4 : session_wrk_handle_evts_main_rpc (void *args)
752 : {
753 4 : vlib_main_t *vm = vlib_get_main ();
754 : clib_llist_index_t ei, next_ei;
755 : session_evt_elt_t *he, *elt;
756 : session_worker_t *fwrk;
757 : u32 thread_index;
758 :
759 4 : vlib_worker_thread_barrier_sync (vm);
760 :
761 4 : thread_index = pointer_to_uword (args);
762 4 : fwrk = session_main_get_worker (thread_index);
763 :
764 4 : he = clib_llist_elt (fwrk->event_elts, fwrk->evts_pending_main);
765 4 : ei = clib_llist_next_index (he, evt_list);
766 :
767 8 : while (ei != fwrk->evts_pending_main)
768 : {
769 4 : elt = clib_llist_elt (fwrk->event_elts, ei);
770 4 : next_ei = clib_llist_next_index (elt, evt_list);
771 4 : clib_llist_remove (fwrk->event_elts, evt_list, elt);
772 4 : switch (elt->evt.event_type)
773 : {
774 2 : case SESSION_CTRL_EVT_LISTEN:
775 2 : session_mq_listen_handler (fwrk, elt);
776 2 : break;
777 2 : case SESSION_CTRL_EVT_UNLISTEN:
778 2 : session_mq_unlisten_handler (fwrk, elt);
779 2 : break;
780 0 : case SESSION_CTRL_EVT_APP_DETACH:
781 0 : app_mq_detach_handler (fwrk, elt);
782 0 : break;
783 0 : case SESSION_CTRL_EVT_CONNECT_URI:
784 0 : session_mq_connect_uri_handler (fwrk, elt);
785 0 : break;
786 0 : case SESSION_CTRL_EVT_ACCEPTED_REPLY:
787 0 : session_mq_accepted_reply_handler (fwrk, elt);
788 0 : break;
789 0 : case SESSION_CTRL_EVT_CONNECT:
790 0 : session_mq_connect_handler (fwrk, elt);
791 0 : break;
792 0 : default:
793 0 : clib_warning ("unhandled %u", elt->evt.event_type);
794 0 : ALWAYS_ASSERT (0);
795 0 : break;
796 : }
797 :
798 : /* Regrab element in case pool moved */
799 4 : elt = clib_llist_elt (fwrk->event_elts, ei);
800 4 : if (!clib_llist_elt_is_linked (elt, evt_list))
801 : {
802 4 : session_evt_ctrl_data_free (fwrk, elt);
803 4 : clib_llist_put (fwrk->event_elts, elt);
804 : }
805 4 : ei = next_ei;
806 : }
807 :
808 4 : vlib_worker_thread_barrier_release (vm);
809 4 : }
810 :
811 : vlib_node_registration_t session_queue_node;
812 :
813 : typedef struct
814 : {
815 : u32 session_index;
816 : u32 server_thread_index;
817 : } session_queue_trace_t;
818 :
819 : /* packet trace format function */
820 : static u8 *
821 0 : format_session_queue_trace (u8 * s, va_list * args)
822 : {
823 0 : CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
824 0 : CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
825 0 : session_queue_trace_t *t = va_arg (*args, session_queue_trace_t *);
826 :
827 0 : s = format (s, "session index %d thread index %d",
828 : t->session_index, t->server_thread_index);
829 0 : return s;
830 : }
831 :
832 : #define foreach_session_queue_error \
833 : _ (TX, tx, INFO, "Packets transmitted") \
834 : _ (TIMER, timer, INFO, "Timer events") \
835 : _ (NO_BUFFER, no_buffer, ERROR, "Out of buffers")
836 :
837 : typedef enum
838 : {
839 : #define _(f, n, s, d) SESSION_QUEUE_ERROR_##f,
840 : foreach_session_queue_error
841 : #undef _
842 : SESSION_QUEUE_N_ERROR,
843 : } session_queue_error_t;
844 :
845 : static vlib_error_desc_t session_error_counters[] = {
846 : #define _(f, n, s, d) { #n, d, VL_COUNTER_SEVERITY_##s },
847 : foreach_session_queue_error
848 : #undef _
849 : };
850 :
851 : enum
852 : {
853 : SESSION_TX_NO_BUFFERS = -2,
854 : SESSION_TX_NO_DATA,
855 : SESSION_TX_OK
856 : };
857 :
858 : static void
859 0 : session_tx_trace_frame (vlib_main_t *vm, vlib_node_runtime_t *node,
860 : u32 next_index, vlib_buffer_t **bufs, u16 n_segs,
861 : session_t *s, u32 n_trace)
862 : {
863 0 : vlib_buffer_t **b = bufs;
864 :
865 0 : while (n_trace && n_segs)
866 : {
867 0 : if (PREDICT_TRUE (vlib_trace_buffer (vm, node, next_index, b[0],
868 : 1 /* follow_chain */)))
869 : {
870 : session_queue_trace_t *t =
871 0 : vlib_add_trace (vm, node, b[0], sizeof (*t));
872 0 : t->session_index = s->session_index;
873 0 : t->server_thread_index = s->thread_index;
874 0 : n_trace--;
875 : }
876 0 : b++;
877 0 : n_segs--;
878 : }
879 0 : vlib_set_trace_count (vm, node, n_trace);
880 0 : }
881 :
882 : always_inline int
883 0 : session_tx_fill_dma_transfers (session_worker_t *wrk,
884 : session_tx_context_t *ctx, vlib_buffer_t *b)
885 : {
886 0 : vlib_main_t *vm = wrk->vm;
887 : u32 len_to_deq;
888 0 : u8 *data0 = NULL;
889 : int n_bytes_read, len_write;
890 : svm_fifo_seg_t data_fs[2];
891 :
892 0 : u32 n_segs = 2;
893 0 : u16 n_transfers = 0;
894 : /*
895 : * Start with the first buffer in chain
896 : */
897 0 : b->error = 0;
898 0 : b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
899 0 : b->current_data = 0;
900 0 : data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
901 0 : len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
902 :
903 0 : n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset,
904 : data_fs, &n_segs, len_to_deq);
905 :
906 0 : len_write = n_bytes_read;
907 0 : ASSERT (n_bytes_read == len_to_deq);
908 :
909 0 : while (n_bytes_read)
910 : {
911 0 : wrk->batch_num++;
912 0 : vlib_dma_batch_add (vm, wrk->batch, data0, data_fs[n_transfers].data,
913 : data_fs[n_transfers].len);
914 0 : data0 += data_fs[n_transfers].len;
915 0 : n_bytes_read -= data_fs[n_transfers].len;
916 0 : n_transfers++;
917 : }
918 0 : return len_write;
919 : }
920 :
921 : always_inline int
922 0 : session_tx_fill_dma_transfers_tail (session_worker_t *wrk,
923 : session_tx_context_t *ctx,
924 : vlib_buffer_t *b, u32 len_to_deq, u8 *data)
925 : {
926 0 : vlib_main_t *vm = wrk->vm;
927 : int n_bytes_read, len_write;
928 : svm_fifo_seg_t data_fs[2];
929 0 : u32 n_segs = 2;
930 0 : u16 n_transfers = 0;
931 :
932 0 : n_bytes_read = svm_fifo_segments (ctx->s->tx_fifo, ctx->sp.tx_offset,
933 : data_fs, &n_segs, len_to_deq);
934 :
935 0 : len_write = n_bytes_read;
936 :
937 0 : ASSERT (n_bytes_read == len_to_deq);
938 :
939 0 : while (n_bytes_read)
940 : {
941 0 : wrk->batch_num++;
942 0 : vlib_dma_batch_add (vm, wrk->batch, data, data_fs[n_transfers].data,
943 : data_fs[n_transfers].len);
944 0 : data += data_fs[n_transfers].len;
945 0 : n_bytes_read -= data_fs[n_transfers].len;
946 0 : n_transfers++;
947 : }
948 :
949 0 : return len_write;
950 : }
951 :
952 : always_inline int
953 996032 : session_tx_copy_data (session_worker_t *wrk, session_tx_context_t *ctx,
954 : vlib_buffer_t *b, u32 len_to_deq, u8 *data0)
955 : {
956 : int n_bytes_read;
957 996032 : if (PREDICT_TRUE (!wrk->dma_enabled))
958 : n_bytes_read =
959 996032 : svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data0);
960 : else
961 0 : n_bytes_read = session_tx_fill_dma_transfers (wrk, ctx, b);
962 996032 : return n_bytes_read;
963 : }
964 :
965 : always_inline int
966 0 : session_tx_copy_data_tail (session_worker_t *wrk, session_tx_context_t *ctx,
967 : vlib_buffer_t *b, u32 len_to_deq, u8 *data)
968 : {
969 : int n_bytes_read;
970 0 : if (PREDICT_TRUE (!wrk->dma_enabled))
971 : n_bytes_read =
972 0 : svm_fifo_peek (ctx->s->tx_fifo, ctx->sp.tx_offset, len_to_deq, data);
973 : else
974 : n_bytes_read =
975 0 : session_tx_fill_dma_transfers_tail (wrk, ctx, b, len_to_deq, data);
976 0 : return n_bytes_read;
977 : }
978 :
979 : always_inline void
980 0 : session_tx_fifo_chain_tail (session_worker_t *wrk, session_tx_context_t *ctx,
981 : vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
982 : {
983 0 : vlib_main_t *vm = wrk->vm;
984 : vlib_buffer_t *chain_b, *prev_b;
985 : u32 chain_bi0, to_deq, left_from_seg;
986 : int len_to_deq, n_bytes_read;
987 : u8 *data, j;
988 :
989 0 : b->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
990 0 : b->total_length_not_including_first_buffer = 0;
991 :
992 0 : chain_b = b;
993 0 : left_from_seg = clib_min (ctx->sp.snd_mss - b->current_length,
994 : ctx->left_to_snd);
995 0 : to_deq = left_from_seg;
996 0 : for (j = 1; j < ctx->n_bufs_per_seg; j++)
997 : {
998 0 : prev_b = chain_b;
999 0 : len_to_deq = clib_min (to_deq, ctx->deq_per_buf);
1000 :
1001 0 : *n_bufs -= 1;
1002 0 : chain_bi0 = ctx->tx_buffers[*n_bufs];
1003 0 : chain_b = vlib_get_buffer (vm, chain_bi0);
1004 0 : chain_b->current_data = 0;
1005 0 : data = vlib_buffer_get_current (chain_b);
1006 0 : if (peek_data)
1007 : {
1008 : n_bytes_read =
1009 0 : session_tx_copy_data_tail (wrk, ctx, b, len_to_deq, data);
1010 0 : ctx->sp.tx_offset += n_bytes_read;
1011 : }
1012 : else
1013 : {
1014 0 : if (ctx->transport_vft->transport_options.tx_type ==
1015 : TRANSPORT_TX_DGRAM)
1016 : {
1017 0 : svm_fifo_t *f = ctx->s->tx_fifo;
1018 0 : session_dgram_hdr_t *hdr = &ctx->hdr;
1019 : u16 deq_now;
1020 : u32 offset;
1021 :
1022 0 : deq_now = clib_min (hdr->data_length - hdr->data_offset,
1023 : len_to_deq);
1024 0 : offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
1025 0 : n_bytes_read = svm_fifo_peek (f, offset, deq_now, data);
1026 0 : ASSERT (n_bytes_read > 0);
1027 :
1028 0 : hdr->data_offset += n_bytes_read;
1029 0 : if (hdr->data_offset == hdr->data_length)
1030 : {
1031 0 : offset = hdr->data_length + SESSION_CONN_HDR_LEN;
1032 0 : svm_fifo_dequeue_drop (f, offset);
1033 0 : if (ctx->left_to_snd > n_bytes_read)
1034 0 : svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
1035 0 : (u8 *) & ctx->hdr);
1036 : }
1037 0 : else if (ctx->left_to_snd == n_bytes_read)
1038 0 : svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1039 : sizeof (session_dgram_pre_hdr_t));
1040 : }
1041 : else
1042 0 : n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
1043 : len_to_deq, data);
1044 : }
1045 0 : ASSERT (n_bytes_read == len_to_deq);
1046 0 : chain_b->current_length = n_bytes_read;
1047 0 : b->total_length_not_including_first_buffer += chain_b->current_length;
1048 :
1049 : /* update previous buffer */
1050 0 : prev_b->next_buffer = chain_bi0;
1051 0 : prev_b->flags |= VLIB_BUFFER_NEXT_PRESENT;
1052 :
1053 : /* update current buffer */
1054 0 : chain_b->next_buffer = 0;
1055 :
1056 0 : to_deq -= n_bytes_read;
1057 0 : if (to_deq == 0)
1058 0 : break;
1059 : }
1060 0 : ASSERT (to_deq == 0
1061 : && b->total_length_not_including_first_buffer == left_from_seg);
1062 0 : ctx->left_to_snd -= left_from_seg;
1063 0 : }
1064 :
1065 : always_inline void
1066 1054200 : session_tx_fill_buffer (session_worker_t *wrk, session_tx_context_t *ctx,
1067 : vlib_buffer_t *b, u16 *n_bufs, u8 peek_data)
1068 : {
1069 : u32 len_to_deq;
1070 : u8 *data0;
1071 : int n_bytes_read;
1072 : /*
1073 : * Start with the first buffer in chain
1074 : */
1075 1054200 : b->error = 0;
1076 1054200 : b->flags = VNET_BUFFER_F_LOCALLY_ORIGINATED;
1077 1054200 : b->current_data = 0;
1078 :
1079 1054200 : data0 = vlib_buffer_make_headroom (b, TRANSPORT_MAX_HDRS_LEN);
1080 1054200 : len_to_deq = clib_min (ctx->left_to_snd, ctx->deq_per_first_buf);
1081 :
1082 1054200 : if (peek_data)
1083 : {
1084 996032 : n_bytes_read = session_tx_copy_data (wrk, ctx, b, len_to_deq, data0);
1085 996032 : ASSERT (n_bytes_read > 0);
1086 : /* Keep track of progress locally, transport is also supposed to
1087 : * increment it independently when pushing the header */
1088 996032 : ctx->sp.tx_offset += n_bytes_read;
1089 : }
1090 : else
1091 : {
1092 58172 : if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1093 : {
1094 58172 : session_dgram_hdr_t *hdr = &ctx->hdr;
1095 58172 : svm_fifo_t *f = ctx->s->tx_fifo;
1096 : u16 deq_now;
1097 : u32 offset;
1098 :
1099 58172 : ASSERT (hdr->data_length > hdr->data_offset);
1100 58172 : deq_now = clib_min (hdr->data_length - hdr->data_offset,
1101 : len_to_deq);
1102 58172 : offset = hdr->data_offset + SESSION_CONN_HDR_LEN;
1103 58172 : n_bytes_read = svm_fifo_peek (f, offset, deq_now, data0);
1104 58172 : ASSERT (n_bytes_read > 0);
1105 :
1106 58172 : if (transport_connection_is_cless (ctx->tc))
1107 : {
1108 0 : clib_memcpy_fast (data0 - sizeof (session_dgram_hdr_t), hdr,
1109 : sizeof (*hdr));
1110 : }
1111 58172 : hdr->data_offset += n_bytes_read;
1112 58172 : if (hdr->data_offset == hdr->data_length)
1113 : {
1114 58172 : offset = hdr->data_length + SESSION_CONN_HDR_LEN;
1115 58172 : svm_fifo_dequeue_drop (f, offset);
1116 58172 : if (ctx->left_to_snd > n_bytes_read)
1117 41745 : svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
1118 41745 : (u8 *) & ctx->hdr);
1119 : }
1120 0 : else if (ctx->left_to_snd == n_bytes_read)
1121 0 : svm_fifo_overwrite_head (ctx->s->tx_fifo, (u8 *) & ctx->hdr,
1122 : sizeof (session_dgram_pre_hdr_t));
1123 : }
1124 : else
1125 : {
1126 0 : n_bytes_read = svm_fifo_dequeue (ctx->s->tx_fifo,
1127 : len_to_deq, data0);
1128 0 : ASSERT (n_bytes_read > 0);
1129 : }
1130 : }
1131 :
1132 1054200 : b->current_length = n_bytes_read;
1133 1054200 : ctx->left_to_snd -= n_bytes_read;
1134 :
1135 : /*
1136 : * Fill in the remaining buffers in the chain, if any
1137 : */
1138 1054200 : if (PREDICT_FALSE (ctx->n_bufs_per_seg > 1 && ctx->left_to_snd))
1139 0 : session_tx_fifo_chain_tail (wrk, ctx, b, n_bufs, peek_data);
1140 1054200 : }
1141 :
1142 : always_inline u8
1143 88189 : session_tx_not_ready (session_t * s, u8 peek_data)
1144 : {
1145 88189 : if (peek_data)
1146 : {
1147 70963 : if (PREDICT_TRUE (s->session_state == SESSION_STATE_READY))
1148 70381 : return 0;
1149 : /* Can retransmit for closed sessions but can't send new data if
1150 : * session is not ready or closed */
1151 582 : else if (s->session_state < SESSION_STATE_READY)
1152 : {
1153 : /* Allow accepting session to send custom packets.
1154 : * For instance, tcp want to send acks in established, but
1155 : * the app has not called accept() yet */
1156 0 : if (s->session_state == SESSION_STATE_ACCEPTING &&
1157 0 : (s->flags & SESSION_F_CUSTOM_TX))
1158 0 : return 0;
1159 0 : return 1;
1160 : }
1161 582 : else if (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED)
1162 : {
1163 : /* Allow closed transports to still send custom packets.
1164 : * For instance, tcp may want to send acks in time-wait. */
1165 131 : if (s->session_state != SESSION_STATE_TRANSPORT_DELETED
1166 131 : && (s->flags & SESSION_F_CUSTOM_TX))
1167 129 : return 0;
1168 2 : return 2;
1169 : }
1170 : }
1171 : else
1172 : {
1173 17226 : if (s->session_state == SESSION_STATE_TRANSPORT_DELETED)
1174 0 : return 2;
1175 : }
1176 17677 : return 0;
1177 : }
1178 :
1179 : always_inline transport_connection_t *
1180 88187 : session_tx_get_transport (session_tx_context_t * ctx, u8 peek_data)
1181 : {
1182 88187 : if (peek_data)
1183 : {
1184 70961 : return ctx->transport_vft->get_connection (ctx->s->connection_index,
1185 70961 : ctx->s->thread_index);
1186 : }
1187 : else
1188 : {
1189 17226 : if (ctx->s->session_state == SESSION_STATE_LISTENING)
1190 0 : return ctx->transport_vft->get_listener (ctx->s->connection_index);
1191 : else
1192 : {
1193 17226 : return ctx->transport_vft->get_connection (ctx->s->connection_index,
1194 17226 : ctx->s->thread_index);
1195 : }
1196 : }
1197 : }
1198 :
1199 : always_inline void
1200 86571 : session_tx_set_dequeue_params (vlib_main_t * vm, session_tx_context_t * ctx,
1201 : u32 max_segs, u8 peek_data)
1202 : {
1203 : u32 n_bytes_per_buf, n_bytes_per_seg;
1204 :
1205 86571 : n_bytes_per_buf = vlib_buffer_get_default_data_size (vm);
1206 86571 : ctx->max_dequeue = svm_fifo_max_dequeue_cons (ctx->s->tx_fifo);
1207 :
1208 86571 : if (peek_data)
1209 : {
1210 : /* Offset in rx fifo from where to peek data */
1211 69345 : if (PREDICT_FALSE (ctx->sp.tx_offset >= ctx->max_dequeue))
1212 : {
1213 27192 : ctx->max_len_to_snd = 0;
1214 27192 : return;
1215 : }
1216 42153 : ctx->max_dequeue -= ctx->sp.tx_offset;
1217 : }
1218 : else
1219 : {
1220 17226 : if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1221 : {
1222 : u32 len, chain_limit;
1223 :
1224 17226 : if (ctx->max_dequeue <= sizeof (ctx->hdr))
1225 : {
1226 799 : ctx->max_len_to_snd = 0;
1227 799 : return;
1228 : }
1229 :
1230 16427 : svm_fifo_peek (ctx->s->tx_fifo, 0, sizeof (ctx->hdr),
1231 16427 : (u8 *) & ctx->hdr);
1232 : /* Zero length dgrams not supported */
1233 16427 : if (PREDICT_FALSE (ctx->hdr.data_length == 0))
1234 : {
1235 0 : svm_fifo_dequeue_drop (ctx->s->tx_fifo, sizeof (ctx->hdr));
1236 0 : ctx->max_len_to_snd = 0;
1237 0 : return;
1238 : }
1239 : /* We cannot be sure apps have not enqueued incomplete dgrams */
1240 16427 : if (PREDICT_FALSE (ctx->max_dequeue <
1241 : ctx->hdr.data_length + sizeof (ctx->hdr)))
1242 : {
1243 0 : ctx->max_len_to_snd = 0;
1244 0 : return;
1245 : }
1246 16427 : ASSERT (ctx->hdr.data_length > ctx->hdr.data_offset);
1247 16427 : len = ctx->hdr.data_length - ctx->hdr.data_offset;
1248 :
1249 16427 : if (ctx->hdr.gso_size)
1250 : {
1251 0 : ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, ctx->hdr.gso_size);
1252 : }
1253 :
1254 : /* Process multiple dgrams if smaller than min (buf_space, mss).
1255 : * This avoids handling multiple dgrams if they require buffer
1256 : * chains */
1257 16427 : chain_limit = clib_min (n_bytes_per_buf - TRANSPORT_MAX_HDRS_LEN,
1258 : ctx->sp.snd_mss);
1259 16427 : if (ctx->hdr.data_length <= chain_limit)
1260 : {
1261 : u32 first_dgram_len, dgram_len, offset, max_offset;
1262 : session_dgram_hdr_t hdr;
1263 :
1264 16427 : ctx->sp.snd_mss = clib_min (ctx->sp.snd_mss, len);
1265 16427 : offset = ctx->hdr.data_length + sizeof (session_dgram_hdr_t);
1266 16427 : first_dgram_len = len;
1267 16427 : max_offset = clib_min (ctx->max_dequeue, 16 << 10);
1268 :
1269 58483 : while (offset < max_offset)
1270 : {
1271 45556 : svm_fifo_peek (ctx->s->tx_fifo, offset, sizeof (ctx->hdr),
1272 : (u8 *) & hdr);
1273 45556 : dgram_len = hdr.data_length - hdr.data_offset;
1274 45556 : if (offset + sizeof (hdr) + hdr.data_length >
1275 45556 : ctx->max_dequeue ||
1276 : first_dgram_len != dgram_len)
1277 : break;
1278 : /* Assert here to allow test above with zero length dgrams */
1279 42056 : ASSERT (hdr.data_length > hdr.data_offset);
1280 42056 : len += dgram_len;
1281 42056 : offset += sizeof (hdr) + hdr.data_length;
1282 : }
1283 : }
1284 :
1285 16427 : ctx->max_dequeue = len;
1286 : }
1287 : }
1288 58580 : ASSERT (ctx->max_dequeue > 0);
1289 :
1290 : /* Ensure we're not writing more than transport window allows */
1291 58580 : if (ctx->max_dequeue < ctx->sp.snd_space)
1292 : {
1293 : /* Constrained by tx queue. Try to send only fully formed segments */
1294 20028 : ctx->max_len_to_snd = (ctx->max_dequeue > ctx->sp.snd_mss) ?
1295 20028 : (ctx->max_dequeue - (ctx->max_dequeue % ctx->sp.snd_mss)) :
1296 : ctx->max_dequeue;
1297 : /* TODO Nagle ? */
1298 : }
1299 : else
1300 : {
1301 : /* Expectation is that snd_space0 is already a multiple of snd_mss */
1302 38552 : ctx->max_len_to_snd = ctx->sp.snd_space;
1303 : }
1304 :
1305 : /* Check if we're tx constrained by the node */
1306 58580 : ctx->n_segs_per_evt = ceil ((f64) ctx->max_len_to_snd / ctx->sp.snd_mss);
1307 58580 : if (ctx->n_segs_per_evt > max_segs)
1308 : {
1309 587 : ctx->n_segs_per_evt = max_segs;
1310 587 : ctx->max_len_to_snd = max_segs * ctx->sp.snd_mss;
1311 : }
1312 :
1313 58580 : ASSERT (n_bytes_per_buf > TRANSPORT_MAX_HDRS_LEN);
1314 58580 : if (ctx->n_segs_per_evt > 1)
1315 : {
1316 : u32 n_bytes_last_seg, n_bufs_last_seg;
1317 :
1318 29253 : n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->sp.snd_mss;
1319 29253 : n_bytes_last_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd
1320 29253 : - ((ctx->n_segs_per_evt - 1) * ctx->sp.snd_mss);
1321 29253 : ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
1322 29253 : n_bufs_last_seg = ceil ((f64) n_bytes_last_seg / n_bytes_per_buf);
1323 29253 : ctx->n_bufs_needed = ((ctx->n_segs_per_evt - 1) * ctx->n_bufs_per_seg)
1324 29253 : + n_bufs_last_seg;
1325 : }
1326 : else
1327 : {
1328 29327 : n_bytes_per_seg = TRANSPORT_MAX_HDRS_LEN + ctx->max_len_to_snd;
1329 29327 : ctx->n_bufs_per_seg = ceil ((f64) n_bytes_per_seg / n_bytes_per_buf);
1330 29327 : ctx->n_bufs_needed = ctx->n_bufs_per_seg;
1331 : }
1332 :
1333 58580 : ctx->deq_per_buf = clib_min (ctx->sp.snd_mss, n_bytes_per_buf);
1334 58580 : ctx->deq_per_first_buf = clib_min (ctx->sp.snd_mss,
1335 : n_bytes_per_buf -
1336 : TRANSPORT_MAX_HDRS_LEN);
1337 : }
1338 :
1339 : always_inline void
1340 49347 : session_tx_maybe_reschedule (session_worker_t * wrk,
1341 : session_tx_context_t * ctx,
1342 : session_evt_elt_t * elt)
1343 : {
1344 49347 : session_t *s = ctx->s;
1345 :
1346 49347 : svm_fifo_unset_event (s->tx_fifo);
1347 49347 : if (svm_fifo_max_dequeue_cons (s->tx_fifo) > ctx->sp.tx_offset)
1348 : {
1349 5830 : if (svm_fifo_set_event (s->tx_fifo))
1350 5828 : session_evt_add_head_old (wrk, elt);
1351 : }
1352 : else
1353 : {
1354 43517 : transport_connection_deschedule (ctx->tc);
1355 : }
1356 49347 : }
1357 :
1358 : always_inline void
1359 1054200 : session_tx_add_pending_buffer (session_worker_t *wrk, u32 bi, u32 next_index)
1360 : {
1361 1054200 : if (PREDICT_TRUE (!wrk->dma_enabled))
1362 : {
1363 1054200 : vec_add1 (wrk->pending_tx_buffers, bi);
1364 1054200 : vec_add1 (wrk->pending_tx_nexts, next_index);
1365 : }
1366 : else
1367 : {
1368 0 : session_dma_transfer *dma_transfer = &wrk->dma_trans[wrk->trans_tail];
1369 0 : vec_add1 (dma_transfer->pending_tx_buffers, bi);
1370 0 : vec_add1 (dma_transfer->pending_tx_nexts, next_index);
1371 : }
1372 1054200 : }
1373 :
1374 : always_inline int
1375 88189 : session_tx_fifo_read_and_snd_i (session_worker_t * wrk,
1376 : vlib_node_runtime_t * node,
1377 : session_evt_elt_t * elt,
1378 : int *n_tx_packets, u8 peek_data)
1379 : {
1380 : u32 n_trace, n_left, pbi, next_index, max_burst;
1381 88189 : session_tx_context_t *ctx = &wrk->ctx;
1382 88189 : session_main_t *smm = &session_main;
1383 88189 : session_event_t *e = &elt->evt;
1384 88189 : vlib_main_t *vm = wrk->vm;
1385 : transport_proto_t tp;
1386 : vlib_buffer_t *pb;
1387 : u16 n_bufs, rv;
1388 :
1389 88189 : if (PREDICT_FALSE ((rv = session_tx_not_ready (ctx->s, peek_data))))
1390 : {
1391 2 : if (rv < 2)
1392 0 : session_evt_add_old (wrk, elt);
1393 2 : return SESSION_TX_NO_DATA;
1394 : }
1395 :
1396 88187 : next_index = smm->session_type_to_next[ctx->s->session_type];
1397 88187 : max_burst = SESSION_NODE_FRAME_SIZE - *n_tx_packets;
1398 :
1399 88187 : tp = session_get_transport_proto (ctx->s);
1400 88187 : ctx->transport_vft = transport_protocol_get_vft (tp);
1401 88187 : ctx->tc = session_tx_get_transport (ctx, peek_data);
1402 :
1403 88187 : if (PREDICT_FALSE (e->event_type == SESSION_IO_EVT_TX_FLUSH))
1404 : {
1405 459 : if (ctx->transport_vft->flush_data)
1406 79 : ctx->transport_vft->flush_data (ctx->tc);
1407 459 : e->event_type = SESSION_IO_EVT_TX;
1408 : }
1409 :
1410 88187 : if (ctx->s->flags & SESSION_F_CUSTOM_TX)
1411 : {
1412 : u32 n_custom_tx;
1413 41252 : ctx->s->flags &= ~SESSION_F_CUSTOM_TX;
1414 41252 : ctx->sp.max_burst_size = max_burst;
1415 41252 : n_custom_tx = ctx->transport_vft->custom_tx (ctx->tc, &ctx->sp);
1416 41252 : *n_tx_packets += n_custom_tx;
1417 41252 : if (PREDICT_FALSE
1418 : (ctx->s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1419 129 : return SESSION_TX_OK;
1420 41123 : max_burst -= n_custom_tx;
1421 41123 : if (!max_burst || (ctx->s->flags & SESSION_F_CUSTOM_TX))
1422 : {
1423 0 : session_evt_add_old (wrk, elt);
1424 0 : return SESSION_TX_OK;
1425 : }
1426 : }
1427 :
1428 : /* Connection previously descheduled because it had no data to send.
1429 : * Clear descheduled flag and reset pacer if in use */
1430 88058 : if (transport_connection_is_descheduled (ctx->tc))
1431 15663 : transport_connection_clear_descheduled (ctx->tc);
1432 :
1433 88058 : transport_connection_snd_params (ctx->tc, &ctx->sp);
1434 :
1435 88058 : if (!ctx->sp.snd_space)
1436 : {
1437 : /* If the deschedule flag was set, remove session from scheduler.
1438 : * Transport is responsible for rescheduling this session. */
1439 1026 : if (ctx->sp.flags & TRANSPORT_SND_F_DESCHED)
1440 1026 : transport_connection_deschedule (ctx->tc);
1441 : /* Request to postpone the session, e.g., zero-wnd and transport
1442 : * is not currently probing */
1443 0 : else if (ctx->sp.flags & TRANSPORT_SND_F_POSTPONE)
1444 0 : session_evt_add_old (wrk, elt);
1445 : /* This flow queue is "empty" so it should be re-evaluated before
1446 : * the ones that have data to send. */
1447 : else
1448 0 : session_evt_add_head_old (wrk, elt);
1449 :
1450 1026 : return SESSION_TX_NO_DATA;
1451 : }
1452 :
1453 87032 : if (transport_connection_is_tx_paced (ctx->tc))
1454 : {
1455 69806 : u32 snd_space = transport_connection_tx_pacer_burst (ctx->tc);
1456 69806 : if (snd_space < TRANSPORT_PACER_MIN_BURST)
1457 : {
1458 461 : session_evt_add_head_old (wrk, elt);
1459 461 : return SESSION_TX_NO_DATA;
1460 : }
1461 69345 : snd_space = clib_min (ctx->sp.snd_space, snd_space);
1462 69345 : ctx->sp.snd_space = snd_space >= ctx->sp.snd_mss ?
1463 69345 : snd_space - snd_space % ctx->sp.snd_mss : snd_space;
1464 : }
1465 :
1466 : /* Check how much we can pull. */
1467 86571 : session_tx_set_dequeue_params (vm, ctx, max_burst, peek_data);
1468 :
1469 86571 : if (PREDICT_FALSE (!ctx->max_len_to_snd))
1470 : {
1471 27991 : transport_connection_tx_pacer_reset_bucket (ctx->tc, 0);
1472 27991 : session_tx_maybe_reschedule (wrk, ctx, elt);
1473 27991 : return SESSION_TX_NO_DATA;
1474 : }
1475 :
1476 58580 : vec_validate_aligned (ctx->tx_buffers, ctx->n_bufs_needed - 1,
1477 : CLIB_CACHE_LINE_BYTES);
1478 58580 : n_bufs = vlib_buffer_alloc (vm, ctx->tx_buffers, ctx->n_bufs_needed);
1479 58580 : if (PREDICT_FALSE (n_bufs < ctx->n_bufs_needed))
1480 : {
1481 0 : if (n_bufs)
1482 0 : vlib_buffer_free (vm, ctx->tx_buffers, n_bufs);
1483 0 : session_evt_add_head_old (wrk, elt);
1484 0 : vlib_node_increment_counter (wrk->vm, node->node_index,
1485 : SESSION_QUEUE_ERROR_NO_BUFFER, 1);
1486 0 : return SESSION_TX_NO_BUFFERS;
1487 : }
1488 :
1489 58580 : if (transport_connection_is_tx_paced (ctx->tc))
1490 42153 : transport_connection_tx_pacer_update_bytes (ctx->tc, ctx->max_len_to_snd);
1491 :
1492 58580 : ctx->left_to_snd = ctx->max_len_to_snd;
1493 58580 : n_left = ctx->n_segs_per_evt;
1494 :
1495 58580 : vec_validate (ctx->transport_pending_bufs, n_left);
1496 :
1497 528566 : while (n_left >= 4)
1498 : {
1499 : vlib_buffer_t *b0, *b1;
1500 : u32 bi0, bi1;
1501 :
1502 469986 : pbi = ctx->tx_buffers[n_bufs - 3];
1503 469986 : pb = vlib_get_buffer (vm, pbi);
1504 469986 : vlib_prefetch_buffer_header (pb, STORE);
1505 469986 : pbi = ctx->tx_buffers[n_bufs - 4];
1506 469986 : pb = vlib_get_buffer (vm, pbi);
1507 469986 : vlib_prefetch_buffer_header (pb, STORE);
1508 :
1509 469986 : bi0 = ctx->tx_buffers[--n_bufs];
1510 469986 : bi1 = ctx->tx_buffers[--n_bufs];
1511 :
1512 469986 : b0 = vlib_get_buffer (vm, bi0);
1513 469986 : b1 = vlib_get_buffer (vm, bi1);
1514 :
1515 469986 : session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data);
1516 469986 : session_tx_fill_buffer (wrk, ctx, b1, &n_bufs, peek_data);
1517 :
1518 469986 : ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0;
1519 469986 : ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left + 1] = b1;
1520 469986 : n_left -= 2;
1521 :
1522 469986 : session_tx_add_pending_buffer (wrk, bi0, next_index);
1523 469986 : session_tx_add_pending_buffer (wrk, bi1, next_index);
1524 : }
1525 172812 : while (n_left)
1526 : {
1527 : vlib_buffer_t *b0;
1528 : u32 bi0;
1529 :
1530 114232 : if (n_left > 1)
1531 : {
1532 55652 : pbi = ctx->tx_buffers[n_bufs - 2];
1533 55652 : pb = vlib_get_buffer (vm, pbi);
1534 55652 : vlib_prefetch_buffer_header (pb, STORE);
1535 : }
1536 :
1537 114232 : bi0 = ctx->tx_buffers[--n_bufs];
1538 114232 : b0 = vlib_get_buffer (vm, bi0);
1539 114232 : session_tx_fill_buffer (wrk, ctx, b0, &n_bufs, peek_data);
1540 :
1541 114232 : ctx->transport_pending_bufs[ctx->n_segs_per_evt - n_left] = b0;
1542 114232 : n_left -= 1;
1543 :
1544 114232 : session_tx_add_pending_buffer (wrk, bi0, next_index);
1545 : }
1546 :
1547 : /* Ask transport to push headers */
1548 58580 : ctx->transport_vft->push_header (ctx->tc, ctx->transport_pending_bufs,
1549 58580 : ctx->n_segs_per_evt);
1550 :
1551 58580 : if (PREDICT_FALSE ((n_trace = vlib_get_trace_count (vm, node)) > 0))
1552 0 : session_tx_trace_frame (vm, node, next_index, ctx->transport_pending_bufs,
1553 0 : ctx->n_segs_per_evt, ctx->s, n_trace);
1554 :
1555 58580 : if (PREDICT_FALSE (n_bufs))
1556 0 : vlib_buffer_free (vm, ctx->tx_buffers, n_bufs);
1557 :
1558 58580 : *n_tx_packets += ctx->n_segs_per_evt;
1559 :
1560 : SESSION_EVT (SESSION_EVT_DEQ, ctx->s, ctx->max_len_to_snd, ctx->max_dequeue,
1561 : ctx->s->tx_fifo->shr->has_event, wrk->last_vlib_time);
1562 :
1563 58580 : ASSERT (ctx->left_to_snd == 0);
1564 :
1565 : /* If we couldn't dequeue all bytes reschedule as old flow. Otherwise,
1566 : * check if application enqueued more data and reschedule accordingly */
1567 58580 : if (ctx->max_len_to_snd < ctx->max_dequeue)
1568 37224 : session_evt_add_old (wrk, elt);
1569 : else
1570 21356 : session_tx_maybe_reschedule (wrk, ctx, elt);
1571 :
1572 58580 : if (!peek_data)
1573 : {
1574 16427 : u32 n_dequeued = ctx->max_len_to_snd;
1575 16427 : if (ctx->transport_vft->transport_options.tx_type == TRANSPORT_TX_DGRAM)
1576 16427 : n_dequeued += ctx->n_segs_per_evt * SESSION_CONN_HDR_LEN;
1577 16427 : if (svm_fifo_needs_deq_ntf (ctx->s->tx_fifo, n_dequeued))
1578 50 : session_dequeue_notify (ctx->s);
1579 : }
1580 58580 : return SESSION_TX_OK;
1581 : }
1582 :
1583 : int
1584 70963 : session_tx_fifo_peek_and_snd (session_worker_t * wrk,
1585 : vlib_node_runtime_t * node,
1586 : session_evt_elt_t * e, int *n_tx_packets)
1587 : {
1588 70963 : return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 1);
1589 : }
1590 :
1591 : int
1592 17226 : session_tx_fifo_dequeue_and_snd (session_worker_t * wrk,
1593 : vlib_node_runtime_t * node,
1594 : session_evt_elt_t * e, int *n_tx_packets)
1595 : {
1596 17226 : return session_tx_fifo_read_and_snd_i (wrk, node, e, n_tx_packets, 0);
1597 : }
1598 :
1599 : int
1600 1476360 : session_tx_fifo_dequeue_internal (session_worker_t * wrk,
1601 : vlib_node_runtime_t * node,
1602 : session_evt_elt_t * elt, int *n_tx_packets)
1603 : {
1604 1476360 : transport_send_params_t *sp = &wrk->ctx.sp;
1605 1476360 : session_t *s = wrk->ctx.s;
1606 : u32 n_packets;
1607 :
1608 1476360 : if (PREDICT_FALSE (s->session_state >= SESSION_STATE_TRANSPORT_CLOSED))
1609 2 : return 0;
1610 :
1611 : /* Clear custom-tx flag used to request reschedule for tx */
1612 1476360 : s->flags &= ~SESSION_F_CUSTOM_TX;
1613 :
1614 1476360 : sp->flags = 0;
1615 1476360 : sp->bytes_dequeued = 0;
1616 1476360 : sp->max_burst_size = clib_min (SESSION_NODE_FRAME_SIZE - *n_tx_packets,
1617 : TRANSPORT_PACER_MAX_BURST_PKTS);
1618 :
1619 1476360 : n_packets = transport_custom_tx (session_get_transport_proto (s), s, sp);
1620 1476360 : *n_tx_packets += n_packets;
1621 :
1622 1476360 : if (s->flags & SESSION_F_CUSTOM_TX)
1623 : {
1624 1284960 : session_evt_add_old (wrk, elt);
1625 : }
1626 191398 : else if (!(sp->flags & TRANSPORT_SND_F_DESCHED))
1627 : {
1628 66511 : svm_fifo_unset_event (s->tx_fifo);
1629 66511 : if (svm_fifo_max_dequeue_cons (s->tx_fifo))
1630 66483 : if (svm_fifo_set_event (s->tx_fifo))
1631 66483 : session_evt_add_head_old (wrk, elt);
1632 : }
1633 :
1634 1477040 : if (sp->bytes_dequeued &&
1635 679 : svm_fifo_needs_deq_ntf (s->tx_fifo, sp->bytes_dequeued))
1636 8 : session_dequeue_notify (s);
1637 :
1638 1476360 : return n_packets;
1639 : }
1640 :
1641 : always_inline session_t *
1642 1575310 : session_event_get_session (session_worker_t * wrk, session_event_t * e)
1643 : {
1644 1575310 : if (PREDICT_FALSE (pool_is_free_index (wrk->sessions, e->session_index)))
1645 18 : return 0;
1646 :
1647 1575290 : ASSERT (session_is_valid (e->session_index, wrk->vm->thread_index));
1648 1575290 : return pool_elt_at_index (wrk->sessions, e->session_index);
1649 : }
1650 :
1651 : always_inline void
1652 892 : session_event_dispatch_ctrl (session_worker_t * wrk, session_evt_elt_t * elt)
1653 : {
1654 : clib_llist_index_t ei;
1655 : void (*fp) (void *);
1656 : session_event_t *e;
1657 : session_t *s;
1658 :
1659 892 : ei = clib_llist_entry_index (wrk->event_elts, elt);
1660 892 : e = &elt->evt;
1661 :
1662 892 : switch (e->event_type)
1663 : {
1664 148 : case SESSION_CTRL_EVT_RPC:
1665 148 : fp = e->rpc_args.fp;
1666 148 : (*fp) (e->rpc_args.arg);
1667 148 : break;
1668 0 : case SESSION_CTRL_EVT_HALF_CLOSE:
1669 0 : s = session_get_from_handle_if_valid (e->session_handle);
1670 0 : if (PREDICT_FALSE (!s))
1671 0 : break;
1672 0 : session_transport_half_close (s);
1673 0 : break;
1674 471 : case SESSION_CTRL_EVT_CLOSE:
1675 471 : s = session_get_from_handle_if_valid (e->session_handle);
1676 471 : if (PREDICT_FALSE (!s))
1677 0 : break;
1678 471 : session_transport_close (s);
1679 471 : break;
1680 0 : case SESSION_CTRL_EVT_RESET:
1681 0 : s = session_get_from_handle_if_valid (e->session_handle);
1682 0 : if (PREDICT_FALSE (!s))
1683 0 : break;
1684 0 : session_transport_reset (s);
1685 0 : break;
1686 43 : case SESSION_CTRL_EVT_LISTEN:
1687 43 : session_mq_listen_handler (wrk, elt);
1688 43 : break;
1689 0 : case SESSION_CTRL_EVT_LISTEN_URI:
1690 0 : session_mq_listen_uri_handler (wrk, elt);
1691 0 : break;
1692 25 : case SESSION_CTRL_EVT_UNLISTEN:
1693 25 : session_mq_unlisten_handler (wrk, elt);
1694 25 : break;
1695 51 : case SESSION_CTRL_EVT_CONNECT:
1696 51 : session_mq_connect_handler (wrk, elt);
1697 51 : break;
1698 0 : case SESSION_CTRL_EVT_CONNECT_URI:
1699 0 : session_mq_connect_uri_handler (wrk, elt);
1700 0 : break;
1701 0 : case SESSION_CTRL_EVT_SHUTDOWN:
1702 0 : session_mq_shutdown_handler (session_evt_ctrl_data (wrk, elt));
1703 0 : break;
1704 61 : case SESSION_CTRL_EVT_DISCONNECT:
1705 61 : session_mq_disconnect_handler (session_evt_ctrl_data (wrk, elt));
1706 61 : break;
1707 0 : case SESSION_CTRL_EVT_DISCONNECTED:
1708 0 : session_mq_disconnected_handler (session_evt_ctrl_data (wrk, elt));
1709 0 : break;
1710 47 : case SESSION_CTRL_EVT_ACCEPTED_REPLY:
1711 47 : session_mq_accepted_reply_handler (wrk, elt);
1712 47 : break;
1713 13 : case SESSION_CTRL_EVT_DISCONNECTED_REPLY:
1714 13 : session_mq_disconnected_reply_handler (session_evt_ctrl_data (wrk,
1715 : elt));
1716 13 : break;
1717 4 : case SESSION_CTRL_EVT_RESET_REPLY:
1718 4 : session_mq_reset_reply_handler (session_evt_ctrl_data (wrk, elt));
1719 4 : break;
1720 0 : case SESSION_CTRL_EVT_WORKER_UPDATE:
1721 0 : session_mq_worker_update_handler (session_evt_ctrl_data (wrk, elt));
1722 0 : break;
1723 24 : case SESSION_CTRL_EVT_APP_DETACH:
1724 24 : app_mq_detach_handler (wrk, elt);
1725 24 : break;
1726 0 : case SESSION_CTRL_EVT_APP_WRK_RPC:
1727 0 : session_mq_app_wrk_rpc_handler (session_evt_ctrl_data (wrk, elt));
1728 0 : break;
1729 5 : case SESSION_CTRL_EVT_TRANSPORT_ATTR:
1730 5 : session_mq_transport_attr_handler (session_evt_ctrl_data (wrk, elt));
1731 5 : break;
1732 0 : default:
1733 0 : clib_warning ("unhandled event type %d", e->event_type);
1734 : }
1735 :
1736 : /* Regrab elements in case pool moved */
1737 892 : elt = clib_llist_elt (wrk->event_elts, ei);
1738 892 : if (!clib_llist_elt_is_linked (elt, evt_list))
1739 : {
1740 837 : e = &elt->evt;
1741 837 : if (e->event_type >= SESSION_CTRL_EVT_BOUND)
1742 218 : session_evt_ctrl_data_free (wrk, elt);
1743 837 : clib_llist_put (wrk->event_elts, elt);
1744 : }
1745 : SESSION_EVT (SESSION_EVT_COUNTS, CNT_CTRL_EVTS, 1, wrk);
1746 892 : }
1747 :
1748 : always_inline void
1749 1575310 : session_event_dispatch_io (session_worker_t * wrk, vlib_node_runtime_t * node,
1750 : session_evt_elt_t * elt, int *n_tx_packets)
1751 : {
1752 1575310 : session_main_t *smm = &session_main;
1753 : app_worker_t *app_wrk;
1754 : clib_llist_index_t ei;
1755 : session_event_t *e;
1756 : session_t *s;
1757 :
1758 1575310 : ei = clib_llist_entry_index (wrk->event_elts, elt);
1759 1575310 : e = &elt->evt;
1760 :
1761 1575310 : switch (e->event_type)
1762 : {
1763 1564570 : case SESSION_IO_EVT_TX_FLUSH:
1764 : case SESSION_IO_EVT_TX:
1765 1564570 : s = session_event_get_session (wrk, e);
1766 1564570 : if (PREDICT_FALSE (!s))
1767 18 : break;
1768 1564550 : CLIB_PREFETCH (s->tx_fifo, sizeof (*(s->tx_fifo)), LOAD);
1769 1564550 : wrk->ctx.s = s;
1770 : /* Spray packets in per session type frames, since they go to
1771 : * different nodes */
1772 1564550 : (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1773 1564550 : break;
1774 592 : case SESSION_IO_EVT_RX:
1775 592 : s = session_event_get_session (wrk, e);
1776 592 : if (!s)
1777 0 : break;
1778 592 : transport_app_rx_evt (session_get_transport_proto (s),
1779 592 : s->connection_index, s->thread_index);
1780 592 : break;
1781 10150 : case SESSION_IO_EVT_BUILTIN_RX:
1782 10150 : s = session_event_get_session (wrk, e);
1783 10150 : if (PREDICT_FALSE (!s || s->session_state >= SESSION_STATE_CLOSING))
1784 : break;
1785 10150 : svm_fifo_unset_event (s->rx_fifo);
1786 10150 : app_wrk = app_worker_get (s->app_wrk_index);
1787 10150 : app_worker_builtin_rx (app_wrk, s);
1788 10150 : break;
1789 0 : case SESSION_IO_EVT_TX_MAIN:
1790 0 : s = session_get_if_valid (e->session_index, 0 /* main thread */);
1791 0 : if (PREDICT_FALSE (!s))
1792 0 : break;
1793 0 : wrk->ctx.s = s;
1794 0 : if (PREDICT_TRUE (s != 0))
1795 0 : (smm->session_tx_fns[s->session_type]) (wrk, node, elt, n_tx_packets);
1796 0 : break;
1797 0 : default:
1798 0 : clib_warning ("unhandled event type %d", e->event_type);
1799 : }
1800 :
1801 0 : SESSION_EVT (SESSION_EVT_IO_EVT_COUNTS, e->event_type, 1, wrk);
1802 :
1803 : /* Regrab elements in case pool moved */
1804 1575310 : elt = clib_llist_elt (wrk->event_elts, ei);
1805 1575310 : if (!clib_llist_elt_is_linked (elt, evt_list))
1806 180353 : clib_llist_put (wrk->event_elts, elt);
1807 1575310 : }
1808 :
1809 : /* *INDENT-OFF* */
1810 : static const u32 session_evt_msg_sizes[] = {
1811 : #define _(symc, sym) \
1812 : [SESSION_CTRL_EVT_ ## symc] = sizeof (session_ ## sym ##_msg_t),
1813 : foreach_session_ctrl_evt
1814 : #undef _
1815 : };
1816 : /* *INDENT-ON* */
1817 :
1818 : always_inline void
1819 75007800 : session_update_time_subscribers (session_main_t *smm, clib_time_type_t now,
1820 : u32 thread_index)
1821 : {
1822 : session_update_time_fn *fn;
1823 :
1824 158744000 : vec_foreach (fn, smm->update_time_fns)
1825 83653500 : (*fn) (now, thread_index);
1826 75065900 : }
1827 :
1828 : always_inline void
1829 150090 : session_evt_add_to_list (session_worker_t * wrk, session_event_t * evt)
1830 : {
1831 : session_evt_elt_t *elt;
1832 :
1833 150090 : if (evt->event_type >= SESSION_CTRL_EVT_RPC)
1834 : {
1835 421 : elt = session_evt_alloc_ctrl (wrk);
1836 421 : if (evt->event_type >= SESSION_CTRL_EVT_BOUND)
1837 : {
1838 273 : elt->evt.ctrl_data_index = session_evt_ctrl_data_alloc (wrk);
1839 273 : elt->evt.event_type = evt->event_type;
1840 273 : clib_memcpy_fast (session_evt_ctrl_data (wrk, elt), evt->data,
1841 273 : session_evt_msg_sizes[evt->event_type]);
1842 : }
1843 : else
1844 : {
1845 : /* Internal control events fit into io events footprint */
1846 148 : clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1847 : }
1848 : }
1849 : else
1850 : {
1851 149669 : elt = session_evt_alloc_new (wrk);
1852 149669 : clib_memcpy_fast (&elt->evt, evt, sizeof (elt->evt));
1853 : }
1854 150090 : }
1855 :
1856 : static void
1857 40965 : session_flush_pending_tx_buffers (session_worker_t * wrk,
1858 : vlib_node_runtime_t * node)
1859 : {
1860 40965 : vlib_buffer_enqueue_to_next_vec (wrk->vm, node, &wrk->pending_tx_buffers,
1861 : &wrk->pending_tx_nexts,
1862 40965 : vec_len (wrk->pending_tx_nexts));
1863 40965 : vec_reset_length (wrk->pending_tx_buffers);
1864 40965 : vec_reset_length (wrk->pending_tx_nexts);
1865 40965 : }
1866 :
1867 : int
1868 74953100 : session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq)
1869 : {
1870 74953100 : svm_msg_q_msg_t _msg, *msg = &_msg;
1871 74953100 : u32 i, n_to_dequeue = 0;
1872 : session_event_t *evt;
1873 :
1874 74953100 : n_to_dequeue = svm_msg_q_size (mq);
1875 75094700 : for (i = 0; i < n_to_dequeue; i++)
1876 : {
1877 150090 : svm_msg_q_sub_raw (mq, msg);
1878 150090 : evt = svm_msg_q_msg_data (mq, msg);
1879 150090 : session_evt_add_to_list (wrk, evt);
1880 150090 : svm_msg_q_free_msg (mq, msg);
1881 : }
1882 :
1883 74944600 : return n_to_dequeue;
1884 : }
1885 :
1886 : static void
1887 584917 : session_wrk_update_state (session_worker_t *wrk)
1888 : {
1889 584917 : vlib_main_t *vm = wrk->vm;
1890 :
1891 584917 : if (wrk->state == SESSION_WRK_POLLING)
1892 : {
1893 580178 : if (clib_llist_elts (wrk->event_elts) == 5 &&
1894 12 : vlib_last_vectors_per_main_loop (vm) < 1)
1895 : {
1896 12 : session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT);
1897 12 : vlib_node_set_state (vm, session_queue_node.index,
1898 : VLIB_NODE_STATE_INTERRUPT);
1899 : }
1900 : }
1901 4751 : else if (wrk->state == SESSION_WRK_INTERRUPT)
1902 : {
1903 9484 : if (clib_llist_elts (wrk->event_elts) > 5 ||
1904 4737 : vlib_last_vectors_per_main_loop (vm) > 1)
1905 : {
1906 10 : session_wrk_set_state (wrk, SESSION_WRK_POLLING);
1907 10 : vlib_node_set_state (vm, session_queue_node.index,
1908 : VLIB_NODE_STATE_POLLING);
1909 : }
1910 4737 : else if (PREDICT_FALSE (!pool_elts (wrk->sessions)))
1911 : {
1912 4 : session_wrk_set_state (wrk, SESSION_WRK_IDLE);
1913 : }
1914 : }
1915 : else
1916 : {
1917 4 : if (clib_llist_elts (wrk->event_elts))
1918 : {
1919 4 : session_wrk_set_state (wrk, SESSION_WRK_INTERRUPT);
1920 : }
1921 : }
1922 584917 : }
1923 :
1924 : static uword
1925 75004100 : session_queue_node_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
1926 : vlib_frame_t * frame)
1927 : {
1928 75004100 : u32 thread_index = vm->thread_index, __clib_unused n_evts;
1929 : session_evt_elt_t *elt, *ctrl_he, *new_he, *old_he;
1930 75004100 : session_main_t *smm = vnet_get_session_main ();
1931 74999100 : session_worker_t *wrk = &smm->wrk[thread_index];
1932 : clib_llist_index_t ei, next_ei, old_ti;
1933 : int n_tx_packets;
1934 :
1935 : SESSION_EVT (SESSION_EVT_DISPATCH_START, wrk);
1936 :
1937 74999100 : session_wrk_update_time (wrk, vlib_time_now (vm));
1938 :
1939 : /*
1940 : * Update transport time
1941 : */
1942 75008300 : session_update_time_subscribers (smm, wrk->last_vlib_time, thread_index);
1943 75036100 : n_tx_packets = vec_len (wrk->pending_tx_buffers);
1944 : SESSION_EVT (SESSION_EVT_DSP_CNTRS, UPDATE_TIME, wrk);
1945 :
1946 75036100 : if (PREDICT_FALSE (wrk->dma_enabled))
1947 : {
1948 0 : if (wrk->trans_head == ((wrk->trans_tail + 1) & (wrk->trans_size - 1)))
1949 0 : return 0;
1950 0 : wrk->batch = vlib_dma_batch_new (vm, wrk->config_index);
1951 0 : if (!wrk->batch)
1952 0 : return 0;
1953 : }
1954 :
1955 : /*
1956 : * Dequeue new internal mq events
1957 : */
1958 :
1959 75036100 : n_evts = session_wrk_handle_mq (wrk, wrk->vpp_event_queue);
1960 : SESSION_EVT (SESSION_EVT_DSP_CNTRS, MQ_DEQ, wrk, n_evts);
1961 :
1962 : /*
1963 : * Handle control events
1964 : */
1965 :
1966 74937900 : ei = wrk->ctrl_head;
1967 74937900 : ctrl_he = clib_llist_elt (wrk->event_elts, ei);
1968 74879400 : next_ei = clib_llist_next_index (ctrl_he, evt_list);
1969 74879400 : old_ti = clib_llist_prev_index (ctrl_he, evt_list);
1970 74879400 : while (ei != old_ti)
1971 : {
1972 892 : ei = next_ei;
1973 892 : elt = clib_llist_elt (wrk->event_elts, next_ei);
1974 892 : next_ei = clib_llist_next_index (elt, evt_list);
1975 892 : clib_llist_remove (wrk->event_elts, evt_list, elt);
1976 892 : session_event_dispatch_ctrl (wrk, elt);
1977 : }
1978 :
1979 : SESSION_EVT (SESSION_EVT_DSP_CNTRS, CTRL_EVTS, wrk);
1980 :
1981 : /*
1982 : * Handle the new io events.
1983 : */
1984 :
1985 74878600 : new_he = clib_llist_elt (wrk->event_elts, wrk->new_head);
1986 74863900 : old_he = clib_llist_elt (wrk->event_elts, wrk->old_head);
1987 74866400 : old_ti = clib_llist_prev_index (old_he, evt_list);
1988 :
1989 74866400 : ei = clib_llist_next_index (new_he, evt_list);
1990 75046700 : while (ei != wrk->new_head && n_tx_packets < SESSION_NODE_FRAME_SIZE)
1991 : {
1992 180353 : elt = clib_llist_elt (wrk->event_elts, ei);
1993 180353 : ei = clib_llist_next_index (elt, evt_list);
1994 180353 : clib_llist_remove (wrk->event_elts, evt_list, elt);
1995 180353 : session_event_dispatch_io (wrk, node, elt, &n_tx_packets);
1996 : }
1997 :
1998 : SESSION_EVT (SESSION_EVT_DSP_CNTRS, NEW_IO_EVTS, wrk);
1999 :
2000 : /*
2001 : * Handle the old io events, if we had any prior to processing the new ones
2002 : */
2003 :
2004 74866400 : if (old_ti != wrk->old_head)
2005 : {
2006 1365270 : old_he = clib_llist_elt (wrk->event_elts, wrk->old_head);
2007 1365270 : ei = clib_llist_next_index (old_he, evt_list);
2008 :
2009 1395420 : while (n_tx_packets < SESSION_NODE_FRAME_SIZE)
2010 : {
2011 1394960 : elt = clib_llist_elt (wrk->event_elts, ei);
2012 1394960 : next_ei = clib_llist_next_index (elt, evt_list);
2013 1394960 : clib_llist_remove (wrk->event_elts, evt_list, elt);
2014 :
2015 1394960 : session_event_dispatch_io (wrk, node, elt, &n_tx_packets);
2016 :
2017 1394960 : if (ei == old_ti)
2018 1364800 : break;
2019 :
2020 30153 : ei = next_ei;
2021 : };
2022 : }
2023 :
2024 74866400 : if (PREDICT_FALSE (wrk->dma_enabled))
2025 : {
2026 0 : if (wrk->batch_num)
2027 : {
2028 0 : vlib_dma_batch_set_cookie (vm, wrk->batch, wrk->trans_tail);
2029 0 : wrk->batch_num = 0;
2030 0 : wrk->trans_tail++;
2031 0 : if (wrk->trans_tail == wrk->trans_size)
2032 0 : wrk->trans_tail = 0;
2033 : }
2034 :
2035 0 : vlib_dma_batch_submit (vm, wrk->batch);
2036 : }
2037 :
2038 : SESSION_EVT (SESSION_EVT_DSP_CNTRS, OLD_IO_EVTS, wrk);
2039 :
2040 74866400 : if (vec_len (wrk->pending_tx_buffers))
2041 40965 : session_flush_pending_tx_buffers (wrk, node);
2042 :
2043 74866400 : vlib_node_increment_counter (vm, session_queue_node.index,
2044 : SESSION_QUEUE_ERROR_TX, n_tx_packets);
2045 :
2046 : SESSION_EVT (SESSION_EVT_DISPATCH_END, wrk, n_tx_packets);
2047 :
2048 74875100 : if (wrk->flags & SESSION_WRK_F_ADAPTIVE)
2049 584917 : session_wrk_update_state (wrk);
2050 :
2051 74875300 : return n_tx_packets;
2052 : }
2053 :
2054 : /* *INDENT-OFF* */
2055 178120 : VLIB_REGISTER_NODE (session_queue_node) = {
2056 : .function = session_queue_node_fn,
2057 : .flags = VLIB_NODE_FLAG_TRACE_SUPPORTED,
2058 : .name = "session-queue",
2059 : .format_trace = format_session_queue_trace,
2060 : .type = VLIB_NODE_TYPE_INPUT,
2061 : .n_errors = SESSION_QUEUE_N_ERROR,
2062 : .error_counters = session_error_counters,
2063 : .state = VLIB_NODE_STATE_DISABLED,
2064 : };
2065 : /* *INDENT-ON* */
2066 :
2067 : static clib_error_t *
2068 4700 : session_wrk_tfd_read_ready (clib_file_t *cf)
2069 : {
2070 4700 : session_worker_t *wrk = session_main_get_worker (cf->private_data);
2071 : u64 buf;
2072 : int rv;
2073 :
2074 4700 : vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
2075 4700 : rv = read (wrk->timerfd, &buf, sizeof (buf));
2076 4700 : if (rv < 0 && errno != EAGAIN)
2077 0 : clib_unix_warning ("failed");
2078 4700 : return 0;
2079 : }
2080 :
2081 : static clib_error_t *
2082 0 : session_wrk_tfd_write_ready (clib_file_t *cf)
2083 : {
2084 0 : return 0;
2085 : }
2086 :
2087 : void
2088 2 : session_wrk_enable_adaptive_mode (session_worker_t *wrk)
2089 : {
2090 2 : u32 thread_index = wrk->vm->thread_index;
2091 2 : clib_file_t template = { 0 };
2092 :
2093 2 : if ((wrk->timerfd = timerfd_create (CLOCK_MONOTONIC, TFD_NONBLOCK)) < 0)
2094 0 : clib_warning ("timerfd_create");
2095 :
2096 2 : template.read_function = session_wrk_tfd_read_ready;
2097 2 : template.write_function = session_wrk_tfd_write_ready;
2098 2 : template.file_descriptor = wrk->timerfd;
2099 2 : template.private_data = thread_index;
2100 2 : template.polling_thread_index = thread_index;
2101 2 : template.description = format (0, "session-wrk-tfd-%u", thread_index);
2102 :
2103 2 : wrk->timerfd_file = clib_file_add (&file_main, &template);
2104 2 : wrk->flags |= SESSION_WRK_F_ADAPTIVE;
2105 2 : }
2106 :
2107 : static clib_error_t *
2108 559 : session_queue_exit (vlib_main_t * vm)
2109 : {
2110 559 : if (vlib_get_n_threads () < 2)
2111 523 : return 0;
2112 :
2113 : /*
2114 : * Shut off (especially) worker-thread session nodes.
2115 : * Otherwise, vpp can crash as the main thread unmaps the
2116 : * API segment.
2117 : */
2118 36 : vlib_worker_thread_barrier_sync (vm);
2119 36 : session_node_enable_disable (0 /* is_enable */ );
2120 36 : vlib_worker_thread_barrier_release (vm);
2121 36 : return 0;
2122 : }
2123 :
2124 2237 : VLIB_MAIN_LOOP_EXIT_FUNCTION (session_queue_exit);
2125 :
2126 : static uword
2127 10 : session_queue_run_on_main (vlib_main_t * vm)
2128 : {
2129 : vlib_node_runtime_t *node;
2130 :
2131 10 : node = vlib_node_get_runtime (vm, session_queue_node.index);
2132 10 : return session_queue_node_fn (vm, node, 0);
2133 : }
2134 :
2135 : static uword
2136 21 : session_queue_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
2137 : vlib_frame_t * f)
2138 : {
2139 21 : uword *event_data = 0;
2140 21 : f64 timeout = 1.0;
2141 : uword event_type;
2142 :
2143 : while (1)
2144 : {
2145 31 : vlib_process_wait_for_event_or_clock (vm, timeout);
2146 10 : event_type = vlib_process_get_events (vm, (uword **) & event_data);
2147 :
2148 10 : switch (event_type)
2149 : {
2150 0 : case SESSION_Q_PROCESS_RUN_ON_MAIN:
2151 : /* Run session queue node on main thread */
2152 0 : session_queue_run_on_main (vm);
2153 0 : break;
2154 0 : case SESSION_Q_PROCESS_STOP:
2155 0 : vlib_node_set_state (vm, session_queue_process_node.index,
2156 : VLIB_NODE_STATE_DISABLED);
2157 0 : timeout = 100000.0;
2158 0 : break;
2159 10 : case ~0:
2160 : /* Timed out. Run on main to ensure all events are handled */
2161 10 : session_queue_run_on_main (vm);
2162 10 : break;
2163 : }
2164 10 : vec_reset_length (event_data);
2165 : }
2166 : return 0;
2167 : }
2168 :
2169 : /* *INDENT-OFF* */
2170 178120 : VLIB_REGISTER_NODE (session_queue_process_node) =
2171 : {
2172 : .function = session_queue_process,
2173 : .type = VLIB_NODE_TYPE_PROCESS,
2174 : .name = "session-queue-process",
2175 : .state = VLIB_NODE_STATE_DISABLED,
2176 : };
2177 : /* *INDENT-ON* */
2178 :
2179 : static_always_inline uword
2180 0 : session_queue_pre_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
2181 : vlib_frame_t * frame)
2182 : {
2183 0 : session_main_t *sm = &session_main;
2184 0 : if (!sm->wrk[0].vpp_event_queue)
2185 0 : return 0;
2186 0 : node = vlib_node_get_runtime (vm, session_queue_node.index);
2187 0 : return session_queue_node_fn (vm, node, frame);
2188 : }
2189 :
2190 : /* *INDENT-OFF* */
2191 178120 : VLIB_REGISTER_NODE (session_queue_pre_input_node) =
2192 : {
2193 : .function = session_queue_pre_input_inline,
2194 : .type = VLIB_NODE_TYPE_PRE_INPUT,
2195 : .name = "session-queue-main",
2196 : .state = VLIB_NODE_STATE_DISABLED,
2197 : };
2198 : /* *INDENT-ON* */
2199 :
2200 : /*
2201 : * fd.io coding-style-patch-verification: ON
2202 : *
2203 : * Local Variables:
2204 : * eval: (c-set-style "gnu")
2205 : * End:
2206 : */
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