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 : #ifndef __included_session_h__
16 : #define __included_session_h__
17 :
18 : #include <vppinfra/llist.h>
19 : #include <vnet/session/session_types.h>
20 : #include <vnet/session/session_lookup.h>
21 : #include <vnet/session/session_debug.h>
22 : #include <svm/message_queue.h>
23 : #include <svm/fifo_segment.h>
24 : #include <vlib/dma/dma.h>
25 :
26 : #define foreach_session_input_error \
27 : _(NO_SESSION, "No session drops") \
28 : _(NO_LISTENER, "No listener for dst port drops") \
29 : _(ENQUEUED, "Packets pushed into rx fifo") \
30 : _(NOT_READY, "Session not ready packets") \
31 : _(FIFO_FULL, "Packets dropped for lack of rx fifo space") \
32 : _(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \
33 : _(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \
34 :
35 : typedef enum
36 : {
37 : #define _(sym,str) SESSION_ERROR_##sym,
38 : foreach_session_input_error
39 : #undef _
40 : SESSION_N_ERROR,
41 : } session_input_error_t;
42 :
43 : typedef struct session_wrk_stats_
44 : {
45 : u32 errors[SESSION_N_ERRORS];
46 : } session_wrk_stats_t;
47 :
48 : typedef struct session_tx_context_
49 : {
50 : CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
51 : session_t *s;
52 : transport_proto_vft_t *transport_vft;
53 : transport_connection_t *tc;
54 : transport_send_params_t sp;
55 : u32 max_dequeue;
56 : u32 left_to_snd;
57 : u32 max_len_to_snd;
58 : u16 deq_per_first_buf;
59 : u16 deq_per_buf;
60 : u16 n_segs_per_evt;
61 : u16 n_bufs_needed;
62 : u8 n_bufs_per_seg;
63 : CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
64 : session_dgram_hdr_t hdr;
65 :
66 : /** Vector of tx buffer free lists */
67 : u32 *tx_buffers;
68 : vlib_buffer_t **transport_pending_bufs;
69 : } session_tx_context_t;
70 :
71 : typedef struct session_evt_elt
72 : {
73 : clib_llist_anchor_t evt_list;
74 : session_event_t evt;
75 : } session_evt_elt_t;
76 :
77 : typedef struct session_ctrl_evt_data_
78 : {
79 : u8 data[SESSION_CTRL_MSG_MAX_SIZE];
80 : } session_evt_ctrl_data_t;
81 :
82 : typedef enum session_wrk_state_
83 : {
84 : SESSION_WRK_POLLING,
85 : SESSION_WRK_INTERRUPT,
86 : SESSION_WRK_IDLE,
87 : } __clib_packed session_wrk_state_t;
88 :
89 : typedef enum session_wrk_flags_
90 : {
91 : SESSION_WRK_F_ADAPTIVE = 1 << 0,
92 : } __clib_packed session_wrk_flag_t;
93 :
94 : #define DMA_TRANS_SIZE 1024
95 : typedef struct
96 : {
97 : u32 *pending_tx_buffers;
98 : u16 *pending_tx_nexts;
99 : } session_dma_transfer;
100 :
101 : typedef struct session_worker_
102 : {
103 : CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
104 :
105 : /** Worker session pool */
106 : session_t *sessions;
107 :
108 : /** vpp event message queue for worker */
109 : svm_msg_q_t *vpp_event_queue;
110 :
111 : /** vlib_time_now last time around the track */
112 : clib_time_type_t last_vlib_time;
113 :
114 : /** vlib_time_now rounded to us precision and as u64 */
115 : clib_us_time_t last_vlib_us_time;
116 :
117 : /** Convenience pointer to this worker's vlib_main */
118 : vlib_main_t *vm;
119 :
120 : /** Per-proto vector of sessions to enqueue */
121 : u32 **session_to_enqueue;
122 :
123 : /** Timerfd used to periodically signal wrk session queue node */
124 : int timerfd;
125 :
126 : /** Worker flags */
127 : session_wrk_flag_t flags;
128 :
129 : /** Worker state */
130 : session_wrk_state_t state;
131 :
132 : /** Context for session tx */
133 : session_tx_context_t ctx;
134 :
135 : /** Pool of session event list elements */
136 : session_evt_elt_t *event_elts;
137 :
138 : /** Pool of ctrl events data buffers */
139 : session_evt_ctrl_data_t *ctrl_evts_data;
140 :
141 : /** Head of control events list */
142 : clib_llist_index_t ctrl_head;
143 :
144 : /** Head of list of elements */
145 : clib_llist_index_t new_head;
146 :
147 : /** Head of list of pending events */
148 : clib_llist_index_t old_head;
149 :
150 : /** Vector of buffers to be sent */
151 : u32 *pending_tx_buffers;
152 :
153 : /** Vector of nexts for the pending tx buffers */
154 : u16 *pending_tx_nexts;
155 :
156 : /** Clib file for timerfd. Used only if adaptive mode is on */
157 : uword timerfd_file;
158 :
159 : /** List of pending connects for first worker */
160 : clib_llist_index_t pending_connects;
161 :
162 : /** Flag that is set if main thread signaled to handle connects */
163 : u32 n_pending_connects;
164 :
165 : /** List head for first worker evts pending handling on main */
166 : clib_llist_index_t evts_pending_main;
167 :
168 : int config_index;
169 : u8 dma_enabled;
170 : session_dma_transfer *dma_trans;
171 : u16 trans_head;
172 : u16 trans_tail;
173 : u16 trans_size;
174 : u16 batch_num;
175 : vlib_dma_batch_t *batch;
176 :
177 : session_wrk_stats_t stats;
178 :
179 : #if SESSION_DEBUG
180 : /** last event poll time by thread */
181 : clib_time_type_t last_event_poll;
182 : #endif
183 : } session_worker_t;
184 :
185 : typedef int (session_fifo_rx_fn) (session_worker_t * wrk,
186 : vlib_node_runtime_t * node,
187 : session_evt_elt_t * e, int *n_tx_packets);
188 :
189 : extern session_fifo_rx_fn session_tx_fifo_peek_and_snd;
190 : extern session_fifo_rx_fn session_tx_fifo_dequeue_and_snd;
191 : extern session_fifo_rx_fn session_tx_fifo_dequeue_internal;
192 :
193 : u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e);
194 :
195 : typedef void (*session_update_time_fn) (f64 time_now, u8 thread_index);
196 :
197 : typedef struct session_main_
198 : {
199 : /** Worker contexts */
200 : session_worker_t *wrk;
201 :
202 : /** Vector of transport update time functions */
203 : session_update_time_fn *update_time_fns;
204 :
205 : /** Event queues memfd segment */
206 : fifo_segment_t wrk_mqs_segment;
207 :
208 : /** Unique segment name counter */
209 : u32 unique_segment_name_counter;
210 :
211 : /** Per transport rx function that can either dequeue or peek */
212 : session_fifo_rx_fn **session_tx_fns;
213 :
214 : /** Per session type output nodes. Could optimize to group nodes by
215 : * fib but lookup would then require session type parsing in session node.
216 : * Trade memory for speed, for now */
217 : u32 *session_type_to_next;
218 :
219 : /** Thread used for allocating active open connections, i.e., half-opens
220 : * for transports like tcp, and sessions that will be migrated for cl
221 : * transports like udp. If vpp has workers, this will be first worker. */
222 : u32 transport_cl_thread;
223 :
224 : transport_proto_t last_transport_proto_type;
225 :
226 : /** Number of workers at pool realloc barrier */
227 : volatile u32 pool_realloc_at_barrier;
228 :
229 : /** Number of workers doing reallocs */
230 : volatile u32 pool_realloc_doing_work;
231 :
232 : /** Lock to synchronize parallel forced reallocs */
233 : clib_spinlock_t pool_realloc_lock;
234 :
235 : /*
236 : * Config parameters
237 : */
238 :
239 : /** Session manager is enabled */
240 : u8 is_enabled;
241 :
242 : /** Session manager initialized (not necessarily enabled) */
243 : u8 is_initialized;
244 :
245 : /** Enable session manager at startup */
246 : u8 session_enable_asap;
247 :
248 : /** Poll session node in main thread */
249 : u8 poll_main;
250 :
251 : /** Allocate private rx mqs for external apps */
252 : u8 use_private_rx_mqs;
253 :
254 : /** Do not enable session queue node adaptive mode */
255 : u8 no_adaptive;
256 :
257 : /** vpp fifo event queue configured length */
258 : u32 configured_wrk_mq_length;
259 :
260 : /** Session ssvm segment configs*/
261 : uword wrk_mqs_segment_size;
262 :
263 : /** Session enable dma*/
264 : u8 dma_enabled;
265 :
266 : /** Session table size parameters */
267 : u32 configured_v4_session_table_buckets;
268 : u32 configured_v4_session_table_memory;
269 : u32 configured_v4_halfopen_table_buckets;
270 : u32 configured_v4_halfopen_table_memory;
271 : u32 configured_v6_session_table_buckets;
272 : u32 configured_v6_session_table_memory;
273 : u32 configured_v6_halfopen_table_buckets;
274 : u32 configured_v6_halfopen_table_memory;
275 :
276 : /** Transport table (preallocation) size parameters */
277 : u32 local_endpoints_table_memory;
278 : u32 local_endpoints_table_buckets;
279 :
280 : /** Preallocate session config parameter */
281 : u32 preallocated_sessions;
282 :
283 : u16 msg_id_base;
284 : } session_main_t;
285 :
286 : extern session_main_t session_main;
287 : extern vlib_node_registration_t session_queue_node;
288 : extern vlib_node_registration_t session_queue_process_node;
289 : extern vlib_node_registration_t session_queue_pre_input_node;
290 :
291 : typedef enum session_q_process_evt_
292 : {
293 : SESSION_Q_PROCESS_RUN_ON_MAIN = 1,
294 : SESSION_Q_PROCESS_STOP
295 : } session_q_process_evt_t;
296 :
297 : #define TRANSPORT_PROTO_INVALID (session_main.last_transport_proto_type + 1)
298 : #define TRANSPORT_N_PROTOS (session_main.last_transport_proto_type + 1)
299 :
300 : static inline void
301 1322180 : session_evt_add_old (session_worker_t * wrk, session_evt_elt_t * elt)
302 : {
303 1322180 : clib_llist_add_tail (wrk->event_elts, evt_list, elt,
304 : clib_llist_elt (wrk->event_elts, wrk->old_head));
305 1322180 : }
306 :
307 : static inline void
308 72772 : session_evt_add_head_old (session_worker_t * wrk, session_evt_elt_t * elt)
309 : {
310 72772 : clib_llist_add (wrk->event_elts, evt_list, elt,
311 : clib_llist_elt (wrk->event_elts, wrk->old_head));
312 72772 : }
313 :
314 :
315 : static inline u32
316 273 : session_evt_ctrl_data_alloc (session_worker_t * wrk)
317 : {
318 : session_evt_ctrl_data_t *data;
319 273 : pool_get (wrk->ctrl_evts_data, data);
320 273 : return (data - wrk->ctrl_evts_data);
321 : }
322 :
323 : static inline session_evt_elt_t *
324 892 : session_evt_alloc_ctrl (session_worker_t * wrk)
325 : {
326 : session_evt_elt_t *elt;
327 892 : clib_llist_get (wrk->event_elts, elt);
328 892 : clib_llist_add_tail (wrk->event_elts, evt_list, elt,
329 : clib_llist_elt (wrk->event_elts, wrk->ctrl_head));
330 892 : return elt;
331 : }
332 :
333 : static inline void *
334 546 : session_evt_ctrl_data (session_worker_t * wrk, session_evt_elt_t * elt)
335 : {
336 546 : return (void *) (pool_elt_at_index (wrk->ctrl_evts_data,
337 : elt->evt.ctrl_data_index));
338 : }
339 :
340 : static inline void
341 273 : session_evt_ctrl_data_free (session_worker_t * wrk, session_evt_elt_t * elt)
342 : {
343 273 : ASSERT (elt->evt.event_type >= SESSION_CTRL_EVT_RPC);
344 273 : pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index);
345 273 : }
346 :
347 : static inline session_evt_elt_t *
348 180353 : session_evt_alloc_new (session_worker_t * wrk)
349 : {
350 : session_evt_elt_t *elt;
351 180353 : clib_llist_get (wrk->event_elts, elt);
352 180353 : clib_llist_add_tail (wrk->event_elts, evt_list, elt,
353 : clib_llist_elt (wrk->event_elts, wrk->new_head));
354 180353 : return elt;
355 : }
356 :
357 : static inline session_evt_elt_t *
358 0 : session_evt_alloc_old (session_worker_t * wrk)
359 : {
360 : session_evt_elt_t *elt;
361 0 : clib_llist_get (wrk->event_elts, elt);
362 0 : clib_llist_add_tail (wrk->event_elts, evt_list, elt,
363 : clib_llist_elt (wrk->event_elts, wrk->old_head));
364 0 : return elt;
365 : }
366 :
367 : int session_wrk_handle_mq (session_worker_t *wrk, svm_msg_q_t *mq);
368 :
369 : session_t *session_alloc (u32 thread_index);
370 : void session_free (session_t * s);
371 : void session_free_w_fifos (session_t * s);
372 : void session_cleanup_half_open (session_handle_t ho_handle);
373 : u8 session_is_valid (u32 si, u8 thread_index);
374 :
375 : always_inline session_t *
376 4592072 : session_get (u32 si, u32 thread_index)
377 : {
378 4592072 : ASSERT (session_is_valid (si, thread_index));
379 4592072 : return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
380 : }
381 :
382 : always_inline session_t *
383 71551 : session_get_if_valid (u64 si, u32 thread_index)
384 : {
385 71551 : if (thread_index >= vec_len (session_main.wrk))
386 18 : return 0;
387 :
388 71533 : if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
389 16 : return 0;
390 :
391 71517 : ASSERT (session_is_valid (si, thread_index));
392 71517 : return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
393 : }
394 :
395 : always_inline session_t *
396 1350387 : session_get_from_handle (session_handle_t handle)
397 : {
398 1350387 : session_main_t *smm = &session_main;
399 : u32 session_index, thread_index;
400 1350387 : session_parse_handle (handle, &session_index, &thread_index);
401 1350387 : return pool_elt_at_index (smm->wrk[thread_index].sessions, session_index);
402 : }
403 :
404 : always_inline session_t *
405 14246 : session_get_from_handle_if_valid (session_handle_t handle)
406 : {
407 : u32 session_index, thread_index;
408 14246 : session_parse_handle (handle, &session_index, &thread_index);
409 14246 : return session_get_if_valid (session_index, thread_index);
410 : }
411 :
412 : u64 session_segment_handle (session_t * s);
413 :
414 : /**
415 : * Get session from handle and avoid pool validation if no same thread
416 : *
417 : * Peekers are fine because pool grows with barrier (see @ref session_alloc)
418 : */
419 : always_inline session_t *
420 58149 : session_get_from_handle_safe (u64 handle)
421 : {
422 58149 : u32 thread_index = session_thread_from_handle (handle);
423 58149 : session_worker_t *wrk = &session_main.wrk[thread_index];
424 :
425 58149 : if (thread_index == vlib_get_thread_index ())
426 : {
427 58149 : return pool_elt_at_index (wrk->sessions,
428 : session_index_from_handle (handle));
429 : }
430 : else
431 : {
432 : /* Don't use pool_elt_at index to avoid pool bitmap reallocs */
433 0 : return wrk->sessions + session_index_from_handle (handle);
434 : }
435 : }
436 :
437 : always_inline session_t *
438 0 : session_clone_safe (u32 session_index, u32 thread_index)
439 : {
440 0 : u32 current_thread_index = vlib_get_thread_index (), new_index;
441 : session_t *old_s, *new_s;
442 :
443 0 : new_s = session_alloc (current_thread_index);
444 0 : new_index = new_s->session_index;
445 : /* Session pools are reallocated with barrier (see @ref session_alloc) */
446 0 : old_s = session_main.wrk[thread_index].sessions + session_index;
447 0 : clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
448 0 : new_s->thread_index = current_thread_index;
449 0 : new_s->session_index = new_index;
450 0 : return new_s;
451 : }
452 :
453 : int session_open (session_endpoint_cfg_t *sep, session_handle_t *rsh);
454 : int session_listen (session_t * s, session_endpoint_cfg_t * sep);
455 : int session_stop_listen (session_t * s);
456 : void session_half_close (session_t *s);
457 : void session_close (session_t * s);
458 : void session_reset (session_t * s);
459 : void session_transport_half_close (session_t *s);
460 : void session_transport_close (session_t * s);
461 : void session_transport_reset (session_t * s);
462 : void session_transport_cleanup (session_t * s);
463 : int session_send_io_evt_to_thread (svm_fifo_t * f,
464 : session_evt_type_t evt_type);
465 : int session_enqueue_notify (session_t * s);
466 : int session_dequeue_notify (session_t * s);
467 : int session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
468 : session_evt_type_t evt_type);
469 : void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
470 : void *rpc_args);
471 : void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
472 : void *rpc_args);
473 : void session_add_self_custom_tx_evt (transport_connection_t * tc,
474 : u8 has_prio);
475 : void sesssion_reschedule_tx (transport_connection_t * tc);
476 : transport_connection_t *session_get_transport (session_t * s);
477 : void session_get_endpoint (session_t * s, transport_endpoint_t * tep,
478 : u8 is_lcl);
479 : int session_transport_attribute (session_t *s, u8 is_get,
480 : transport_endpt_attr_t *attr);
481 :
482 : u8 *format_session (u8 * s, va_list * args);
483 : uword unformat_session (unformat_input_t * input, va_list * args);
484 : uword unformat_transport_connection (unformat_input_t * input,
485 : va_list * args);
486 :
487 : /*
488 : * Interface to transport protos
489 : */
490 :
491 : int session_enqueue_stream_connection (transport_connection_t * tc,
492 : vlib_buffer_t * b, u32 offset,
493 : u8 queue_event, u8 is_in_order);
494 : int session_enqueue_dgram_connection (session_t * s,
495 : session_dgram_hdr_t * hdr,
496 : vlib_buffer_t * b, u8 proto,
497 : u8 queue_event);
498 : int session_stream_connect_notify (transport_connection_t * tc,
499 : session_error_t err);
500 : int session_dgram_connect_notify (transport_connection_t * tc,
501 : u32 old_thread_index,
502 : session_t ** new_session);
503 : int session_stream_accept_notify (transport_connection_t * tc);
504 : void session_transport_closing_notify (transport_connection_t * tc);
505 : void session_transport_delete_notify (transport_connection_t * tc);
506 : void session_half_open_delete_notify (transport_connection_t *tc);
507 : void session_half_open_migrate_notify (transport_connection_t *tc);
508 : int session_half_open_migrated_notify (transport_connection_t *tc);
509 : void session_transport_closed_notify (transport_connection_t * tc);
510 : void session_transport_reset_notify (transport_connection_t * tc);
511 : int session_stream_accept (transport_connection_t * tc, u32 listener_index,
512 : u32 thread_index, u8 notify);
513 : int session_dgram_accept (transport_connection_t * tc, u32 listener_index,
514 : u32 thread_index);
515 : /**
516 : * Initialize session layer for given transport proto and ip version
517 : *
518 : * Allocates per session type (transport proto + ip version) data structures
519 : * and adds arc from session queue node to session type output node.
520 : *
521 : * @param transport_proto transport proto to be registered
522 : * @param vft virtual function table for transport
523 : * @param is_ip4 flag that indicates if transports uses ipv4
524 : * as underlying network layer
525 : * @param output_node output node for transport
526 : */
527 : void session_register_transport (transport_proto_t transport_proto,
528 : const transport_proto_vft_t * vft, u8 is_ip4,
529 : u32 output_node);
530 : transport_proto_t session_add_transport_proto (void);
531 : void session_register_update_time_fn (session_update_time_fn fn, u8 is_add);
532 : int session_tx_fifo_peek_bytes (transport_connection_t * tc, u8 * buffer,
533 : u32 offset, u32 max_bytes);
534 : u32 session_tx_fifo_dequeue_drop (transport_connection_t * tc, u32 max_bytes);
535 :
536 : always_inline void
537 2438 : session_set_state (session_t *s, session_state_t session_state)
538 : {
539 2438 : s->session_state = session_state;
540 : SESSION_EVT (SESSION_EVT_STATE_CHANGE, s);
541 2438 : }
542 :
543 : always_inline u32
544 95327 : transport_max_rx_enqueue (transport_connection_t * tc)
545 : {
546 95327 : session_t *s = session_get (tc->s_index, tc->thread_index);
547 95327 : return svm_fifo_max_enqueue_prod (s->rx_fifo);
548 : }
549 :
550 : always_inline u32
551 2149220 : transport_max_tx_dequeue (transport_connection_t * tc)
552 : {
553 2149220 : session_t *s = session_get (tc->s_index, tc->thread_index);
554 2149220 : return svm_fifo_max_dequeue_cons (s->tx_fifo);
555 : }
556 :
557 : always_inline u32
558 133 : transport_max_rx_dequeue (transport_connection_t * tc)
559 : {
560 133 : session_t *s = session_get (tc->s_index, tc->thread_index);
561 133 : return svm_fifo_max_dequeue (s->rx_fifo);
562 : }
563 :
564 : always_inline u32
565 0 : transport_rx_fifo_size (transport_connection_t * tc)
566 : {
567 0 : session_t *s = session_get (tc->s_index, tc->thread_index);
568 0 : return svm_fifo_size (s->rx_fifo);
569 : }
570 :
571 : always_inline u32
572 267 : transport_tx_fifo_size (transport_connection_t * tc)
573 : {
574 267 : session_t *s = session_get (tc->s_index, tc->thread_index);
575 267 : return svm_fifo_size (s->tx_fifo);
576 : }
577 :
578 : always_inline u8
579 : transport_rx_fifo_has_ooo_data (transport_connection_t * tc)
580 : {
581 : session_t *s = session_get (tc->c_index, tc->thread_index);
582 : return svm_fifo_has_ooo_data (s->rx_fifo);
583 : }
584 :
585 : always_inline u32
586 45 : transport_tx_fifo_has_dgram (transport_connection_t *tc)
587 : {
588 45 : session_t *s = session_get (tc->s_index, tc->thread_index);
589 45 : u32 max_deq = svm_fifo_max_dequeue_cons (s->tx_fifo);
590 : session_dgram_pre_hdr_t phdr;
591 :
592 45 : if (max_deq <= sizeof (session_dgram_hdr_t))
593 43 : return 0;
594 2 : svm_fifo_peek (s->tx_fifo, 0, sizeof (phdr), (u8 *) &phdr);
595 2 : return max_deq >= phdr.data_length + sizeof (session_dgram_hdr_t);
596 : }
597 :
598 : always_inline void
599 0 : transport_rx_fifo_req_deq_ntf (transport_connection_t *tc)
600 : {
601 0 : session_t *s = session_get (tc->s_index, tc->thread_index);
602 0 : svm_fifo_add_want_deq_ntf (s->rx_fifo, SVM_FIFO_WANT_DEQ_NOTIF);
603 0 : }
604 :
605 : always_inline clib_time_type_t
606 : transport_time_now (u32 thread_index)
607 : {
608 : return session_main.wrk[thread_index].last_vlib_time;
609 : }
610 :
611 : always_inline clib_us_time_t
612 129655 : transport_us_time_now (u32 thread_index)
613 : {
614 129655 : return session_main.wrk[thread_index].last_vlib_us_time;
615 : }
616 :
617 : always_inline clib_time_type_t
618 41205 : transport_seconds_per_loop (u32 thread_index)
619 : {
620 41205 : return session_main.wrk[thread_index].vm->seconds_per_loop;
621 : }
622 :
623 : always_inline void
624 : transport_add_tx_event (transport_connection_t * tc)
625 : {
626 : session_t *s = session_get (tc->s_index, tc->thread_index);
627 : if (svm_fifo_has_event (s->tx_fifo))
628 : return;
629 : session_send_io_evt_to_thread (s->tx_fifo, SESSION_IO_EVT_TX);
630 : }
631 :
632 : always_inline u32
633 2691 : transport_cl_thread (void)
634 : {
635 2691 : return session_main.transport_cl_thread;
636 : }
637 :
638 : always_inline u32
639 708 : session_vlib_thread_is_cl_thread (void)
640 : {
641 708 : return (vlib_get_thread_index () == transport_cl_thread () ||
642 0 : vlib_thread_is_main_w_barrier ());
643 : }
644 :
645 : /*
646 : * Listen sessions
647 : */
648 :
649 : always_inline u64
650 431 : listen_session_get_handle (session_t * s)
651 : {
652 431 : ASSERT (s->session_state == SESSION_STATE_LISTENING ||
653 : session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
654 431 : return session_handle (s);
655 : }
656 :
657 : always_inline session_t *
658 363 : listen_session_get_from_handle (session_handle_t handle)
659 : {
660 363 : return session_get_from_handle (handle);
661 : }
662 :
663 : always_inline void
664 : listen_session_parse_handle (session_handle_t handle, u32 * index,
665 : u32 * thread_index)
666 : {
667 : session_parse_handle (handle, index, thread_index);
668 : }
669 :
670 : always_inline session_t *
671 78 : listen_session_alloc (u8 thread_index, session_type_t type)
672 : {
673 : session_t *s;
674 78 : s = session_alloc (thread_index);
675 78 : s->session_type = type;
676 78 : s->session_state = SESSION_STATE_LISTENING;
677 78 : return s;
678 : }
679 :
680 : always_inline session_t *
681 549 : listen_session_get (u32 ls_index)
682 : {
683 549 : return session_get (ls_index, 0);
684 : }
685 :
686 : always_inline void
687 62 : listen_session_free (session_t * s)
688 : {
689 62 : ASSERT (!s->rx_fifo);
690 62 : session_free (s);
691 62 : }
692 :
693 : always_inline session_t *
694 148 : ho_session_alloc (void)
695 : {
696 : session_t *s;
697 148 : ASSERT (session_vlib_thread_is_cl_thread ());
698 148 : s = session_alloc (transport_cl_thread ());
699 148 : s->session_state = SESSION_STATE_CONNECTING;
700 148 : s->flags |= SESSION_F_HALF_OPEN;
701 148 : return s;
702 : }
703 :
704 : always_inline session_t *
705 305 : ho_session_get (u32 ho_index)
706 : {
707 305 : return session_get (ho_index, transport_cl_thread ());
708 : }
709 :
710 : always_inline void
711 : ho_session_free (session_t *s)
712 : {
713 : ASSERT (!s->rx_fifo && s->thread_index == 0);
714 : session_free (s);
715 : }
716 :
717 : transport_connection_t *listen_session_get_transport (session_t * s);
718 :
719 : /*
720 : * Session layer functions
721 : */
722 :
723 : always_inline session_main_t *
724 75002249 : vnet_get_session_main ()
725 : {
726 75002249 : return &session_main;
727 : }
728 :
729 : always_inline session_worker_t *
730 1232971 : session_main_get_worker (u32 thread_index)
731 : {
732 1232971 : return vec_elt_at_index (session_main.wrk, thread_index);
733 : }
734 :
735 : static inline session_worker_t *
736 0 : session_main_get_worker_if_valid (u32 thread_index)
737 : {
738 0 : if (thread_index > vec_len (session_main.wrk))
739 0 : return 0;
740 0 : return session_main_get_worker (thread_index);
741 : }
742 :
743 : always_inline svm_msg_q_t *
744 2227 : session_main_get_vpp_event_queue (u32 thread_index)
745 : {
746 2227 : return session_main_get_worker (thread_index)->vpp_event_queue;
747 : }
748 :
749 : always_inline u8
750 97 : session_main_is_enabled ()
751 : {
752 97 : return session_main.is_enabled == 1;
753 : }
754 :
755 : always_inline void
756 0 : session_worker_stat_error_inc (session_worker_t *wrk, int error, int value)
757 : {
758 0 : if ((-(error) >= 0 && -(error) < SESSION_N_ERRORS))
759 0 : wrk->stats.errors[-error] += value;
760 : else
761 : SESSION_DBG ("unknown session counter");
762 0 : }
763 :
764 : always_inline void
765 0 : session_stat_error_inc (int error, int value)
766 : {
767 : session_worker_t *wrk;
768 0 : wrk = session_main_get_worker (vlib_get_thread_index ());
769 0 : session_worker_stat_error_inc (wrk, error, value);
770 0 : }
771 :
772 : #define session_cli_return_if_not_enabled() \
773 : do { \
774 : if (!session_main.is_enabled) \
775 : return clib_error_return (0, "session layer is not enabled"); \
776 : } while (0)
777 :
778 : int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
779 : int session_main_flush_all_enqueue_events (u8 transport_proto);
780 : void session_queue_run_on_main_thread (vlib_main_t * vm);
781 :
782 : /**
783 : * Add session node pending buffer with custom node
784 : *
785 : * @param thread_index worker thread expected to send the buffer
786 : * @param bi buffer index
787 : * @param next_node next node edge index for buffer. Edge to next node
788 : * must exist
789 : */
790 : always_inline void
791 24780 : session_add_pending_tx_buffer (u32 thread_index, u32 bi, u32 next_node)
792 : {
793 24780 : session_worker_t *wrk = session_main_get_worker (thread_index);
794 24780 : vec_add1 (wrk->pending_tx_buffers, bi);
795 24780 : vec_add1 (wrk->pending_tx_nexts, next_node);
796 24780 : if (PREDICT_FALSE (wrk->state == SESSION_WRK_INTERRUPT))
797 22 : vlib_node_set_interrupt_pending (wrk->vm, session_queue_node.index);
798 24780 : }
799 :
800 : always_inline void
801 75072743 : session_wrk_update_time (session_worker_t *wrk, f64 now)
802 : {
803 75072743 : wrk->last_vlib_time = now;
804 75072743 : wrk->last_vlib_us_time = wrk->last_vlib_time * CLIB_US_TIME_FREQ;
805 75072743 : }
806 :
807 : void session_wrk_enable_adaptive_mode (session_worker_t *wrk);
808 : fifo_segment_t *session_main_get_wrk_mqs_segment (void);
809 : void session_node_enable_disable (u8 is_en);
810 : clib_error_t *vnet_session_enable_disable (vlib_main_t * vm, u8 is_en);
811 : void session_wrk_handle_evts_main_rpc (void *);
812 :
813 : session_t *session_alloc_for_connection (transport_connection_t * tc);
814 : session_t *session_alloc_for_half_open (transport_connection_t *tc);
815 :
816 : typedef void (pool_safe_realloc_rpc_fn) (void *rpc_args);
817 :
818 : typedef struct
819 : {
820 : u8 ph[STRUCT_OFFSET_OF (pool_header_t, max_elts) + 4];
821 : u32 flag;
822 : } pool_safe_realloc_header_t;
823 :
824 : STATIC_ASSERT_SIZEOF (pool_safe_realloc_header_t, sizeof (pool_header_t));
825 :
826 : #define POOL_REALLOC_SAFE_ELT_THRESH 32
827 :
828 : #define pool_realloc_flag(PH) \
829 : ((pool_safe_realloc_header_t *) pool_header (PH))->flag
830 :
831 : typedef struct pool_realloc_rpc_args_
832 : {
833 : void **pool;
834 : uword elt_size;
835 : uword align;
836 : } pool_realloc_rpc_args_t;
837 :
838 : always_inline void
839 79 : pool_program_safe_realloc_rpc (void *args)
840 : {
841 79 : vlib_main_t *vm = vlib_get_main ();
842 : u32 free_elts, max_elts, n_alloc;
843 : pool_realloc_rpc_args_t *pra;
844 :
845 79 : ASSERT (vlib_get_thread_index () == 0);
846 79 : pra = (pool_realloc_rpc_args_t *) args;
847 :
848 79 : vlib_worker_thread_barrier_sync (vm);
849 :
850 79 : free_elts = _pool_free_elts (*pra->pool, pra->elt_size);
851 79 : if (free_elts < POOL_REALLOC_SAFE_ELT_THRESH)
852 : {
853 79 : max_elts = _vec_max_len (*pra->pool, pra->elt_size);
854 79 : n_alloc = clib_max (2 * max_elts, POOL_REALLOC_SAFE_ELT_THRESH);
855 79 : _pool_alloc (pra->pool, n_alloc, pra->align, 0, pra->elt_size);
856 : }
857 79 : pool_realloc_flag (*pra->pool) = 0;
858 79 : clib_mem_free (args);
859 :
860 79 : vlib_worker_thread_barrier_release (vm);
861 79 : }
862 :
863 : always_inline void
864 79 : pool_program_safe_realloc (void **p, u32 elt_size, u32 align)
865 : {
866 : pool_realloc_rpc_args_t *pra;
867 :
868 : /* Reuse pad as a realloc flag */
869 79 : if (pool_realloc_flag (*p))
870 0 : return;
871 :
872 79 : pra = clib_mem_alloc (sizeof (*pra));
873 79 : pra->pool = p;
874 79 : pra->elt_size = elt_size;
875 79 : pra->align = align;
876 79 : pool_realloc_flag (*p) = 1;
877 :
878 79 : session_send_rpc_evt_to_thread (0 /* thread index */,
879 : pool_program_safe_realloc_rpc, pra);
880 : }
881 :
882 : #define pool_needs_realloc(P) \
883 : ((!P) || \
884 : (vec_len (pool_header (P)->free_indices) < POOL_REALLOC_SAFE_ELT_THRESH && \
885 : pool_free_elts (P) < POOL_REALLOC_SAFE_ELT_THRESH))
886 :
887 : #define pool_get_aligned_safe(P, E, align) \
888 : do \
889 : { \
890 : if (PREDICT_FALSE (pool_needs_realloc (P))) \
891 : { \
892 : if (PREDICT_FALSE (!(P))) \
893 : { \
894 : pool_alloc_aligned (P, POOL_REALLOC_SAFE_ELT_THRESH, align); \
895 : } \
896 : else if (PREDICT_FALSE (!pool_free_elts (P))) \
897 : { \
898 : vlib_workers_sync (); \
899 : pool_alloc_aligned (P, pool_max_len (P), align); \
900 : vlib_workers_continue (); \
901 : ALWAYS_ASSERT (pool_free_elts (P) > 0); \
902 : } \
903 : else \
904 : { \
905 : pool_program_safe_realloc ((void **) &(P), sizeof ((P)[0]), \
906 : _vec_align (P, align)); \
907 : } \
908 : } \
909 : pool_get_aligned (P, E, align); \
910 : } \
911 : while (0)
912 :
913 : #endif /* __included_session_h__ */
914 :
915 : /*
916 : * fd.io coding-style-patch-verification: ON
917 : *
918 : * Local Variables:
919 : * eval: (c-set-style "gnu")
920 : * End:
921 : */
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