FD.io VPP  v19.08.3-2-gbabecb413
Vector Packet Processing
session.h
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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>
22 #include <svm/message_queue.h>
23 #include <svm/ssvm.h>
24 
25 #define foreach_session_input_error \
26 _(NO_SESSION, "No session drops") \
27 _(NO_LISTENER, "No listener for dst port drops") \
28 _(ENQUEUED, "Packets pushed into rx fifo") \
29 _(NOT_READY, "Session not ready packets") \
30 _(FIFO_FULL, "Packets dropped for lack of rx fifo space") \
31 _(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \
32 _(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \
33 _(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \
34 _(NO_SPACE, "Couldn't allocate a fifo pair") \
35 _(SEG_CREATE, "Couldn't create a new segment")
36 
37 typedef enum
38 {
39 #define _(sym,str) SESSION_ERROR_##sym,
41 #undef _
44 
45 typedef struct session_tx_context_
46 {
47  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
61  CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
64 
65 typedef struct session_evt_elt
66 {
68  session_event_t evt;
70 
71 typedef struct session_ctrl_evt_data_
72 {
75 
76 typedef struct session_worker_
77 {
78  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
79 
80  /** Worker session pool */
82 
83  /** vpp event message queue for worker */
85 
86  /** vlib_time_now last time around the track */
88 
89  /** vlib_time_now rounded to us precision and as u64 */
91 
92  /** Convenience pointer to this worker's vlib_main */
94 
95  /** Per-proto vector of sessions to enqueue */
96  u32 *session_to_enqueue[TRANSPORT_N_PROTO];
97 
98  /** Context for session tx */
100 
101  /** Vector of tx buffer free lists */
103 
104  /** Pool of session event list elements */
106 
107  /** Pool of ctrl events data buffers */
109 
110  /** Head of control events list */
112 
113  /** Head of list of elements */
115 
116  /** Head of list of pending events */
118 
119  /** Peekers rw lock */
121 
122  /** Vector of buffers to be sent */
124 
125  /** Vector of nexts for the pending tx buffers */
127 
128 #if SESSION_DEBUG
129  /** last event poll time by thread */
130  clib_time_type_t last_event_poll;
131 #endif
133 
135  vlib_node_runtime_t * node,
136  session_evt_elt_t * e, int *n_tx_packets);
137 
141 
142 u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_event_t * e);
143 
144 typedef struct session_main_
145 {
146  /** Worker contexts */
148 
149  /** Event queues memfd segment initialized only if so configured */
151 
152  /** Unique segment name counter */
154 
155  /** Per transport rx function that can either dequeue or peek */
157 
158  /** Per session type output nodes. Could optimize to group nodes by
159  * fib but lookup would then require session type parsing in session node.
160  * Trade memory for speed, for now */
162 
163  /*
164  * Config parameters
165  */
166 
167  /** Session manager is enabled */
169  /** Enable session manager at startup */
171 
172  /** vpp fifo event queue configured length */
174 
175  /** Session ssvm segment configs*/
180 
181  /** Session table size parameters */
190 
191  /** Transport table (preallocation) size parameters */
194 
195  /** Preallocate session config parameter */
197 
199 
204 
205 #define SESSION_Q_PROCESS_FLUSH_FRAMES 1
206 #define SESSION_Q_PROCESS_STOP 2
207 
208 static inline session_evt_elt_t *
210 {
211  session_evt_elt_t *elt;
212  pool_get (wrk->event_elts, elt);
213  return elt;
214 }
215 
216 static inline void
218 {
219  pool_put (wrk->event_elts, elt);
220 }
221 
222 static inline void
224 {
225  clib_llist_add_tail (wrk->event_elts, evt_list, elt,
226  pool_elt_at_index (wrk->event_elts, wrk->old_head));
227 }
228 
229 static inline void
231 {
232  clib_llist_add (wrk->event_elts, evt_list, elt,
233  pool_elt_at_index (wrk->event_elts, wrk->old_head));
234 }
235 
236 
237 static inline u32
239 {
241  pool_get (wrk->ctrl_evts_data, data);
242  return (data - wrk->ctrl_evts_data);
243 }
244 
245 static inline session_evt_elt_t *
247 {
248  session_evt_elt_t *elt;
249  elt = session_evt_elt_alloc (wrk);
250  clib_llist_add_tail (wrk->event_elts, evt_list, elt,
251  pool_elt_at_index (wrk->event_elts, wrk->ctrl_head));
252  return elt;
253 }
254 
255 static inline void *
257 {
258  return (void *) (pool_elt_at_index (wrk->ctrl_evts_data,
259  elt->evt.ctrl_data_index));
260 }
261 
262 static inline void
264 {
265  ASSERT (elt->evt.event_type > SESSION_IO_EVT_BUILTIN_TX);
266  pool_put_index (wrk->ctrl_evts_data, elt->evt.ctrl_data_index);
267 }
268 
269 static inline session_evt_elt_t *
271 {
272  session_evt_elt_t *elt;
273  elt = session_evt_elt_alloc (wrk);
274  clib_llist_add_tail (wrk->event_elts, evt_list, elt,
275  pool_elt_at_index (wrk->event_elts, wrk->new_head));
276  return elt;
277 }
278 
279 static inline session_evt_elt_t *
281 {
282  session_evt_elt_t *elt;
283  elt = session_evt_elt_alloc (wrk);
284  clib_llist_add_tail (wrk->event_elts, evt_list, elt,
285  pool_elt_at_index (wrk->event_elts, wrk->old_head));
286  return elt;
287 }
288 
289 session_t *session_alloc (u32 thread_index);
290 void session_free (session_t * s);
292 u8 session_is_valid (u32 si, u8 thread_index);
293 
295 session_get (u32 si, u32 thread_index)
296 {
297  ASSERT (session_is_valid (si, thread_index));
298  return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
299 }
300 
302 session_get_if_valid (u64 si, u32 thread_index)
303 {
304  if (thread_index >= vec_len (session_main.wrk))
305  return 0;
306 
307  if (pool_is_free_index (session_main.wrk[thread_index].sessions, si))
308  return 0;
309 
310  ASSERT (session_is_valid (si, thread_index));
311  return pool_elt_at_index (session_main.wrk[thread_index].sessions, si);
312 }
313 
316 {
318  u32 session_index, thread_index;
319  session_parse_handle (handle, &session_index, &thread_index);
320  return pool_elt_at_index (smm->wrk[thread_index].sessions, session_index);
321 }
322 
325 {
326  u32 session_index, thread_index;
327  session_parse_handle (handle, &session_index, &thread_index);
328  return session_get_if_valid (session_index, thread_index);
329 }
330 
332 
333 /**
334  * Acquires a lock that blocks a session pool from expanding.
335  *
336  * This is typically used for safely peeking into other threads'
337  * pools in order to clone elements. Lock should be dropped as soon
338  * as possible by calling @ref session_pool_remove_peeker.
339  *
340  * NOTE: Avoid using pool_elt_at_index while the lock is held because
341  * it may lead to free elt bitmap expansion/contraction!
342  */
343 always_inline void
345 {
346  session_worker_t *wrk = &session_main.wrk[thread_index];
347  if (thread_index == vlib_get_thread_index ())
348  return;
350 }
351 
352 always_inline void
354 {
355  session_worker_t *wrk = &session_main.wrk[thread_index];
356  if (thread_index == vlib_get_thread_index ())
357  return;
359 }
360 
361 /**
362  * Get session from handle and 'lock' pool resize if not in same thread
363  *
364  * Caller should drop the peek 'lock' as soon as possible.
365  */
368 {
369  u32 thread_index = session_thread_from_handle (handle);
370  session_worker_t *wrk = &session_main.wrk[thread_index];
371 
372  if (thread_index == vlib_get_thread_index ())
373  {
374  return pool_elt_at_index (wrk->sessions,
375  session_index_from_handle (handle));
376  }
377  else
378  {
379  session_pool_add_peeker (thread_index);
380  /* Don't use pool_elt_at index. See @ref session_pool_add_peeker */
381  return wrk->sessions + session_index_from_handle (handle);
382  }
383 }
384 
387 {
388  return (s - session_main.wrk[s->thread_index].sessions);
389 }
390 
392 session_clone_safe (u32 session_index, u32 thread_index)
393 {
394  session_t *old_s, *new_s;
395  u32 current_thread_index = vlib_get_thread_index ();
396 
397  /* If during the memcpy pool is reallocated AND the memory allocator
398  * decides to give the old chunk of memory to somebody in a hurry to
399  * scribble something on it, we have a problem. So add this thread as
400  * a session pool peeker.
401  */
402  session_pool_add_peeker (thread_index);
403  new_s = session_alloc (current_thread_index);
404  old_s = session_main.wrk[thread_index].sessions + session_index;
405  clib_memcpy_fast (new_s, old_s, sizeof (*new_s));
406  session_pool_remove_peeker (thread_index);
407  new_s->thread_index = current_thread_index;
408  new_s->session_index = session_get_index (new_s);
409  return new_s;
410 }
411 
412 int session_open (u32 app_index, session_endpoint_t * tep, u32 opaque);
415 void session_close (session_t * s);
416 void session_reset (session_t * s);
421  session_evt_type_t evt_type);
424 int session_send_io_evt_to_thread_custom (void *data, u32 thread_index,
425  session_evt_type_t evt_type);
426 void session_send_rpc_evt_to_thread (u32 thread_index, void *fp,
427  void *rpc_args);
428 void session_send_rpc_evt_to_thread_force (u32 thread_index, void *fp,
429  void *rpc_args);
431  u8 has_prio);
434  u8 is_lcl);
435 
436 u8 *format_session (u8 * s, va_list * args);
437 uword unformat_session (unformat_input_t * input, va_list * args);
439  va_list * args);
440 
441 /*
442  * Interface to transport protos
443  */
444 
446  vlib_buffer_t * b, u32 offset,
447  u8 queue_event, u8 is_in_order);
449  session_dgram_hdr_t * hdr,
450  vlib_buffer_t * b, u8 proto,
451  u8 queue_event);
454  u32 old_thread_index,
455  session_t ** new_session);
461 int session_stream_accept (transport_connection_t * tc, u32 listener_index,
462  u32 thread_index, u8 notify);
463 void session_register_transport (transport_proto_t transport_proto,
464  const transport_proto_vft_t * vft, u8 is_ip4,
465  u32 output_node);
467  u32 offset, u32 max_bytes);
469 
472 {
473  session_t *s = session_get (tc->s_index, tc->thread_index);
475 }
476 
479 {
480  session_t *s = session_get (tc->s_index, tc->thread_index);
482 }
483 
486 {
487  session_t *s = session_get (tc->s_index, tc->thread_index);
488  return svm_fifo_max_dequeue (s->rx_fifo);
489 }
490 
493 {
494  session_t *s = session_get (tc->s_index, tc->thread_index);
495  return s->rx_fifo->nitems;
496 }
497 
500 {
501  session_t *s = session_get (tc->s_index, tc->thread_index);
502  return s->tx_fifo->nitems;
503 }
504 
507 {
508  session_t *s = session_get (tc->c_index, tc->thread_index);
509  return svm_fifo_has_ooo_data (s->rx_fifo);
510 }
511 
513 transport_time_now (u32 thread_index)
514 {
515  return session_main.wrk[thread_index].last_vlib_time;
516 }
517 
520 {
521  return session_main.wrk[thread_index].last_vlib_us_time;
522 }
523 
524 always_inline void
526 {
527  session_t *s = session_get (tc->s_index, tc->thread_index);
528  if (svm_fifo_has_event (s->tx_fifo))
529  return;
531 }
532 
533 /*
534  * Listen sessions
535  */
536 
539 {
540  ASSERT (s->session_state == SESSION_STATE_LISTENING ||
541  session_get_transport_proto (s) == TRANSPORT_PROTO_QUIC);
542  return session_handle (s);
543 }
544 
547 {
548  return session_get_from_handle (handle);
549 }
550 
551 always_inline void
553  u32 * thread_index)
554 {
555  session_parse_handle (handle, index, thread_index);
556 }
557 
560 {
561  session_t *s;
562  s = session_alloc (thread_index);
563  s->session_type = type;
564  s->session_state = SESSION_STATE_LISTENING;
565  return s;
566 }
567 
570 {
571  return session_get (ls_index, 0);
572 }
573 
574 always_inline void
576 {
577  session_free (s);
578 }
579 
581 
582 /*
583  * Session layer functions
584  */
585 
588 {
589  return &session_main;
590 }
591 
594 {
595  return &session_main.wrk[thread_index];
596 }
597 
598 static inline session_worker_t *
600 {
601  if (thread_index > vec_len (session_main.wrk))
602  return 0;
603  return &session_main.wrk[thread_index];
604 }
605 
608 {
609  return session_main.wrk[thread_index].vpp_event_queue;
610 }
611 
614 {
615  return session_main.is_enabled == 1;
616 }
617 
618 #define session_cli_return_if_not_enabled() \
619 do { \
620  if (!session_main.is_enabled) \
621  return clib_error_return (0, "session layer is not enabled"); \
622 } while (0)
623 
624 int session_main_flush_enqueue_events (u8 proto, u32 thread_index);
625 int session_main_flush_all_enqueue_events (u8 transport_proto);
627 
628 always_inline void
630 {
631  session_worker_t *wrk = session_main_get_worker (thread_index);
632  vec_add1 (wrk->pending_tx_buffers, bi);
633  vec_add1 (wrk->pending_tx_nexts, session_main.session_type_to_next[st]);
634 }
635 
637 void session_node_enable_disable (u8 is_en);
639 
640 #endif /* __included_session_h__ */
641 
642 /*
643  * fd.io coding-style-patch-verification: ON
644  *
645  * Local Variables:
646  * eval: (c-set-style "gnu")
647  * End:
648  */
transport_connection_t * session_get_transport(session_t *s)
Definition: session.c:1468
static void clib_rwlock_reader_lock(clib_rwlock_t *p)
Definition: lock.h:150
u32 preallocated_sessions
Preallocate session config parameter.
Definition: session.h:196
int session_enqueue_dgram_connection(session_t *s, session_dgram_hdr_t *hdr, vlib_buffer_t *b, u8 proto, u8 queue_event)
Definition: session.c:467
uword evt_qs_segment_size
Definition: session.h:178
u32 session_tx_fifo_dequeue_drop(transport_connection_t *tc, u32 max_bytes)
Definition: session.c:511
int session_tx_fifo_peek_bytes(transport_connection_t *tc, u8 *buffer, u32 offset, u32 max_bytes)
Definition: session.c:503
int session_listen(session_t *s, session_endpoint_cfg_t *sep)
Ask transport to listen on session endpoint.
Definition: session.c:1170
f64 clib_time_type_t
Definition: time.h:203
session_type_t session_type
Type built from transport and network protocol types.
static u32 transport_rx_fifo_size(transport_connection_t *tc)
Definition: session.h:492
int session_stream_accept_notify(transport_connection_t *tc)
Definition: session.c:1003
static clib_time_type_t transport_time_now(u32 thread_index)
Definition: session.h:513
svm_msg_q_t * vpp_event_queue
vpp event message queue for worker
Definition: session.h:84
static u32 svm_fifo_max_enqueue_prod(svm_fifo_t *f)
Maximum number of bytes that can be enqueued into fifo.
Definition: svm_fifo.h:618
transport_connection_t * listen_session_get_transport(session_t *s)
Definition: session.c:1491
u8 * format_session(u8 *s, va_list *args)
Format stream session as per the following format.
Definition: session_cli.c:55
svm_fifo_t * tx_fifo
static void session_add_pending_tx_buffer(session_type_t st, u32 thread_index, u32 bi)
Definition: session.h:629
uword unformat_transport_connection(unformat_input_t *input, va_list *args)
Definition: session_cli.c:214
static u8 svm_fifo_has_ooo_data(svm_fifo_t *f)
Check if fifo has out-of-order data.
Definition: svm_fifo.h:692
u32 session_index
Index in thread pool where session was allocated.
unsigned long u64
Definition: types.h:89
struct session_tx_context_ session_tx_context_t
static svm_msg_q_t * session_main_get_vpp_event_queue(u32 thread_index)
Definition: session.h:607
u32 configured_v4_halfopen_table_buckets
Definition: session.h:184
u8 session_enable_asap
Enable session manager at startup.
Definition: session.h:170
#define clib_llist_add_tail(LP, name, E, H)
Add entry after tail.
Definition: llist.h:181
#define clib_memcpy_fast(a, b, c)
Definition: string.h:81
session_t * s
Definition: session.h:48
svm_fifo_t * rx_fifo
Pointers to rx/tx buffers.
session_worker_t * wrk
Worker contexts.
Definition: session.h:147
static session_t * session_get_if_valid(u64 si, u32 thread_index)
Definition: session.h:302
static u32 session_get_index(session_t *s)
Definition: session.h:386
static session_t * listen_session_get_from_handle(session_handle_t handle)
Definition: session.h:546
int session_stop_listen(session_t *s)
Ask transport to stop listening on local transport endpoint.
Definition: session.c:1198
session_evt_ctrl_data_t * ctrl_evts_data
Pool of ctrl events data buffers.
Definition: session.h:108
session_evt_type_t
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:522
static transport_proto_t session_get_transport_proto(session_t *s)
static session_t * listen_session_alloc(u8 thread_index, session_type_t type)
Definition: session.h:559
int session_stream_connect_notify(transport_connection_t *tc, u8 is_fail)
Definition: session.c:765
void session_add_self_custom_tx_evt(transport_connection_t *tc, u8 has_prio)
Definition: session.c:123
static void session_pool_remove_peeker(u32 thread_index)
Definition: session.h:353
static session_t * session_get(u32 si, u32 thread_index)
Definition: session.h:295
session_evt_elt_t * event_elts
Pool of session event list elements.
Definition: session.h:105
u8 data[128]
Definition: ipsec.api:251
static void * session_evt_ctrl_data(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:256
u32 unique_segment_name_counter
Unique segment name counter.
Definition: session.h:153
static session_t * session_clone_safe(u32 session_index, u32 thread_index)
Definition: session.h:392
#define pool_get(P, E)
Allocate an object E from a pool P (unspecified alignment).
Definition: pool.h:236
u32 local_endpoints_table_memory
Transport table (preallocation) size parameters.
Definition: session.h:192
uword unformat_session(unformat_input_t *input, va_list *args)
Definition: session_cli.c:183
vlib_node_registration_t session_queue_node
(constructor) VLIB_REGISTER_NODE (session_queue_node)
static void session_parse_handle(session_handle_t handle, u32 *index, u32 *thread_index)
unsigned char u8
Definition: types.h:56
session_fifo_rx_fn session_tx_fifo_peek_and_snd
u16 * pending_tx_nexts
Vector of nexts for the pending tx buffers.
Definition: session.h:126
static u32 session_evt_ctrl_data_alloc(session_worker_t *wrk)
Definition: session.h:238
session_t * sessions
Worker session pool.
Definition: session.h:81
struct session_evt_elt session_evt_elt_t
static session_handle_t session_handle(session_t *s)
struct _svm_fifo svm_fifo_t
CLIB_CACHE_LINE_ALIGN_MARK(cacheline0)
static session_evt_elt_t * session_evt_elt_alloc(session_worker_t *wrk)
Definition: session.h:209
void session_transport_cleanup(session_t *s)
Cleanup transport and session state.
Definition: session.c:1316
session_t * session_alloc(u32 thread_index)
Definition: session.c:170
u8 session_type_t
u32 * tx_buffers
Vector of tx buffer free lists.
Definition: session.h:102
#define clib_llist_add(LP, name, E, H)
Add entry after head.
Definition: llist.h:172
static session_worker_t * session_main_get_worker(u32 thread_index)
Definition: session.h:593
vlib_node_registration_t session_queue_pre_input_node
(constructor) VLIB_REGISTER_NODE (session_queue_pre_input_node)
vlib_main_t * vm
Convenience pointer to this worker&#39;s vlib_main.
Definition: session.h:93
void session_send_rpc_evt_to_thread(u32 thread_index, void *fp, void *rpc_args)
Definition: session.c:111
#define always_inline
Definition: clib.h:99
void session_transport_closed_notify(transport_connection_t *tc)
Notification from transport that it is closed.
Definition: session.c:953
static u32 svm_fifo_max_dequeue(svm_fifo_t *f)
Fifo max bytes to dequeue.
Definition: svm_fifo.h:527
clib_llist_index_t new_head
Head of list of elements.
Definition: session.h:114
static u32 svm_fifo_max_dequeue_cons(svm_fifo_t *f)
Fifo max bytes to dequeue optimized for consumer.
Definition: svm_fifo.h:498
u32 * session_type_to_next
Per session type output nodes.
Definition: session.h:161
int session_open(u32 app_index, session_endpoint_t *tep, u32 opaque)
Ask transport to open connection to remote transport endpoint.
Definition: session.c:1154
uword session_baseva
Session ssvm segment configs.
Definition: session.h:176
int session_dequeue_notify(session_t *s)
Definition: session.c:634
unsigned int u32
Definition: types.h:88
u64 session_segment_handle(session_t *s)
Definition: session.c:1410
struct _transport_proto_vft transport_proto_vft_t
struct _session_endpoint_cfg session_endpoint_cfg_t
vl_api_fib_path_type_t type
Definition: fib_types.api:123
u32 configured_v6_halfopen_table_memory
Definition: session.h:189
u32 configured_v6_session_table_buckets
Definition: session.h:186
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:514
int session_stream_accept(transport_connection_t *tc, u32 listener_index, u32 thread_index, u8 notify)
Accept a stream session.
Definition: session.c:1020
session_event_t evt
Definition: session.h:68
uword session_va_space_size
Definition: session.h:177
u32 configured_v4_session_table_buckets
Session table size parameters.
Definition: session.h:182
static void clib_rwlock_reader_unlock(clib_rwlock_t *p)
Definition: lock.h:165
static session_t * session_get_from_handle(session_handle_t handle)
Definition: session.h:315
transport_proto_vft_t * transport_vft
Definition: session.h:49
void session_register_transport(transport_proto_t transport_proto, const transport_proto_vft_t *vft, u8 is_ip4, u32 output_node)
Initialize session layer for given transport proto and ip version.
Definition: session.c:1438
struct _unformat_input_t unformat_input_t
u32 configured_v6_halfopen_table_buckets
Definition: session.h:188
unsigned short u16
Definition: types.h:57
static void session_evt_ctrl_data_free(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:263
u32 configured_event_queue_length
vpp fifo event queue configured length
Definition: session.h:173
void session_free(session_t *s)
Definition: session.c:196
u8 is_enabled
Session manager is enabled.
Definition: session.h:168
static u32 transport_max_rx_dequeue(transport_connection_t *tc)
Definition: session.h:485
#define SESSION_CTRL_MSG_MAX_SIZE
Definition: session_types.h:24
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:286
static session_t * session_get_from_handle_safe(u64 handle)
Get session from handle and &#39;lock&#39; pool resize if not in same thread.
Definition: session.h:367
session_fifo_rx_fn ** session_tx_fns
Per transport rx function that can either dequeue or peek.
Definition: session.h:156
static session_evt_elt_t * session_evt_alloc_old(session_worker_t *wrk)
Definition: session.h:280
void session_reset(session_t *s)
Force a close without waiting for data to be flushed.
Definition: session.c:1246
static u64 listen_session_get_handle(session_t *s)
Definition: session.h:538
static void session_pool_add_peeker(u32 thread_index)
Acquires a lock that blocks a session pool from expanding.
Definition: session.h:344
clib_rwlock_t peekers_rw_locks
Peekers rw lock.
Definition: session.h:120
static session_t * session_get_from_handle_if_valid(session_handle_t handle)
Definition: session.h:324
void session_node_enable_disable(u8 is_en)
Definition: session.c:1579
u8 evt_qs_use_memfd_seg
Definition: session.h:179
clib_llist_anchor_t evt_list
Definition: session.h:67
session_fifo_rx_fn session_tx_fifo_dequeue_and_snd
ssvm_private_t evt_qs_segment
Event queues memfd segment initialized only if so configured.
Definition: session.h:150
static void session_evt_elt_free(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:217
int session_dgram_connect_notify(transport_connection_t *tc, u32 old_thread_index, session_t **new_session)
Move dgram session to the right thread.
Definition: session.c:823
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:218
Unidirectional shared-memory multi-ring message queue.
session_main_t session_main
Definition: session.c:26
static u8 transport_rx_fifo_has_ooo_data(transport_connection_t *tc)
Definition: session.h:506
void session_free_w_fifos(session_t *s)
Definition: session.c:247
struct _transport_connection transport_connection_t
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:283
static session_evt_elt_t * session_evt_alloc_new(session_worker_t *wrk)
Definition: session.h:270
void session_transport_delete_notify(transport_connection_t *tc)
Notification from transport that connection is being deleted.
Definition: session.c:887
struct session_worker_ session_worker_t
u32 * pending_tx_buffers
Vector of buffers to be sent.
Definition: session.h:123
struct session_main_ session_main_t
static u32 session_thread_from_handle(session_handle_t handle)
static clib_us_time_t transport_us_time_now(u32 thread_index)
Definition: session.h:519
clib_error_t * vnet_session_enable_disable(vlib_main_t *vm, u8 is_en)
Definition: session.c:1613
static u32 transport_max_tx_dequeue(transport_connection_t *tc)
Definition: session.h:478
static u32 session_index_from_handle(session_handle_t handle)
#define pool_put_index(p, i)
Free pool element with given index.
Definition: pool.h:311
#define ASSERT(truth)
void session_transport_reset_notify(transport_connection_t *tc)
Notify application that connection has been reset.
Definition: session.c:988
int session_enqueue_notify(session_t *s)
Definition: session.c:596
void session_close(session_t *s)
Initialize session closing procedure.
Definition: session.c:1223
struct session_ctrl_evt_data_ session_evt_ctrl_data_t
int session_send_io_evt_to_thread(svm_fifo_t *f, session_evt_type_t evt_type)
Definition: session.c:80
u8 session_is_valid(u32 si, u8 thread_index)
Definition: session.c:210
session_tx_context_t ctx
Context for session tx.
Definition: session.h:99
static void transport_add_tx_event(transport_connection_t *tc)
Definition: session.h:525
int session_send_io_evt_to_thread_custom(void *data, u32 thread_index, session_evt_type_t evt_type)
Definition: session.c:87
u32 clib_llist_index_t
Definition: llist.h:27
void session_transport_reset(session_t *s)
Force transport close.
Definition: session.c:1292
enum _transport_proto transport_proto_t
int session_enqueue_stream_connection(transport_connection_t *tc, vlib_buffer_t *b, u32 offset, u8 queue_event, u8 is_in_order)
Definition: session.c:414
clib_time_type_t last_vlib_time
vlib_time_now last time around the track
Definition: session.h:87
u32 configured_v4_halfopen_table_memory
Definition: session.h:185
u32 configured_v4_session_table_memory
Definition: session.h:183
void session_send_rpc_evt_to_thread_force(u32 thread_index, void *fp, void *rpc_args)
Definition: session.c:103
session_dgram_hdr_t hdr
Definition: session.h:62
int() session_fifo_rx_fn(session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *e, int *n_tx_packets)
Definition: session.h:134
u8 thread_index
Index of the thread that allocated the session.
void session_get_endpoint(session_t *s, transport_endpoint_t *tep, u8 is_lcl)
Definition: session.c:1479
static void listen_session_free(session_t *s)
Definition: session.h:575
struct _vlib_node_registration vlib_node_registration_t
template key/value backing page structure
Definition: bihash_doc.h:44
u32 local_endpoints_table_buckets
Definition: session.h:193
u64 session_handle_t
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
session_fifo_rx_fn session_tx_fifo_dequeue_internal
clib_llist_index_t old_head
Head of list of pending events.
Definition: session.h:117
volatile u8 session_state
State in session layer state machine.
VLIB buffer representation.
Definition: buffer.h:102
u64 uword
Definition: types.h:112
static void session_evt_add_old(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:223
int session_main_flush_all_enqueue_events(u8 transport_proto)
Definition: session.c:693
static void session_evt_add_head_old(session_worker_t *wrk, session_evt_elt_t *elt)
Definition: session.h:230
session_error_t
Definition: session.h:37
#define foreach_session_input_error
Definition: session.h:25
static session_evt_elt_t * session_evt_alloc_ctrl(session_worker_t *wrk)
Definition: session.h:246
transport_connection_t * tc
Definition: session.h:50
u32 configured_v6_session_table_memory
Definition: session.h:187
clib_us_time_t last_vlib_us_time
vlib_time_now rounded to us precision and as u64
Definition: session.h:90
vlib_node_registration_t session_queue_process_node
(constructor) VLIB_REGISTER_NODE (session_queue_process_node)
static int svm_fifo_has_event(svm_fifo_t *f)
Check if fifo has io event.
Definition: svm_fifo.h:734
int session_main_flush_enqueue_events(u8 proto, u32 thread_index)
Flushes queue of sessions that are to be notified of new data enqueued events.
Definition: session.c:664
u8 session_node_lookup_fifo_event(svm_fifo_t *f, session_event_t *e)
static session_main_t * vnet_get_session_main()
Definition: session.h:587
static u32 transport_max_rx_enqueue(transport_connection_t *tc)
Definition: session.h:471
clib_llist_index_t ctrl_head
Head of control events list.
Definition: session.h:111
struct _session_endpoint session_endpoint_t
u64 clib_us_time_t
Definition: time.h:204
void session_transport_close(session_t *s)
Notify transport the session can be disconnected.
Definition: session.c:1264
void session_transport_closing_notify(transport_connection_t *tc)
Notification from transport that connection is being closed.
Definition: session.c:865
ssvm_private_t * session_main_get_evt_q_segment(void)
Definition: session.c:1401
static u32 transport_tx_fifo_size(transport_connection_t *tc)
Definition: session.h:499
static session_t * listen_session_get(u32 ls_index)
Definition: session.h:569
vl_api_fib_path_nh_proto_t proto
Definition: fib_types.api:125
void session_flush_frames_main_thread(vlib_main_t *vm)
Definition: session.c:1498
static session_worker_t * session_main_get_worker_if_valid(u32 thread_index)
Definition: session.h:599
static u8 session_main_is_enabled()
Definition: session.h:613
static void listen_session_parse_handle(session_handle_t handle, u32 *index, u32 *thread_index)
Definition: session.h:552