FD.io VPP  v18.01-8-g0eacf49
Vector Packet Processing
session.h
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1 /*
2  * Copyright (c) 2017 Cisco and/or its affiliates.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
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 
24 
25 #define HALF_OPEN_LOOKUP_INVALID_VALUE ((u64)~0)
26 #define INVALID_INDEX ((u32)~0)
27 #define SESSION_PROXY_LISTENER_INDEX ((u32)~0 - 1)
28 
29 /* TODO decide how much since we have pre-data as well */
30 #define MAX_HDRS_LEN 100 /* Max number of bytes for headers */
31 
32 typedef enum
33 {
41 
42 static inline const char *
43 fifo_event_type_str (fifo_event_type_t et)
44 {
45  switch (et)
46  {
47  case FIFO_EVENT_APP_RX:
48  return "FIFO_EVENT_APP_RX";
49  case FIFO_EVENT_APP_TX:
50  return "FIFO_EVENT_APP_TX";
51  case FIFO_EVENT_TIMEOUT:
52  return "FIFO_EVENT_TIMEOUT";
54  return "FIFO_EVENT_DISCONNECT";
56  return "FIFO_EVENT_BUILTIN_RX";
57  case FIFO_EVENT_RPC:
58  return "FIFO_EVENT_RPC";
59  default:
60  return "UNKNOWN FIFO EVENT";
61  }
62 }
63 
64 #define foreach_session_input_error \
65 _(NO_SESSION, "No session drops") \
66 _(NO_LISTENER, "No listener for dst port drops") \
67 _(ENQUEUED, "Packets pushed into rx fifo") \
68 _(NOT_READY, "Session not ready packets") \
69 _(FIFO_FULL, "Packets dropped for lack of rx fifo space") \
70 _(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space") \
71 _(API_QUEUE_FULL, "Sessions not created for lack of API queue space") \
72 _(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair") \
73 _(NO_SPACE, "Couldn't allocate a fifo pair")
74 
75 typedef enum
76 {
77 #define _(sym,str) SESSION_ERROR_##sym,
79 #undef _
82 
83 typedef struct
84 {
85  void *fp;
86  void *arg;
87 } rpc_args_t;
88 
89 /* *INDENT-OFF* */
90 typedef CLIB_PACKED (struct {
91  union
92  {
93  svm_fifo_t * fifo;
95  rpc_args_t rpc_args;
96  };
97  u8 event_type;
98  u8 postponed;
99 }) session_fifo_event_t;
100 /* *INDENT-ON* */
101 
102 /* Forward definition */
103 typedef struct _session_manager_main session_manager_main_t;
104 
105 typedef int
108  session_fifo_event_t * e0, stream_session_t * s0,
109  u32 thread_index, int *n_tx_pkts);
110 
113 
114 u8 session_node_lookup_fifo_event (svm_fifo_t * f, session_fifo_event_t * e);
115 
116 struct _session_manager_main
117 {
118  /** Per worker thread session pools */
119  stream_session_t **sessions;
120 
121  /** Per worker-thread count of threads peeking into the session pool */
122  u32 *session_peekers;
123 
124  /** Per worker-thread rw peekers locks */
125  clib_spinlock_t *peekers_readers_locks;
126  clib_spinlock_t *peekers_write_locks;
127 
128  /** Pool of listen sessions. Same type as stream sessions to ease lookups */
129  stream_session_t **listen_sessions;
130 
131  /** Per-proto, per-worker enqueue epoch counters */
132  u32 *current_enqueue_epoch[TRANSPORT_N_PROTO];
133 
134  /** Per-proto, per-worker thread vector of sessions to enqueue */
135  u32 **session_to_enqueue[TRANSPORT_N_PROTO];
136 
137  /** per-worker tx buffer free lists */
138  u32 **tx_buffers;
139 
140  /** Per worker-thread vector of partially read events */
141  session_fifo_event_t **free_event_vector;
142 
143  /** per-worker active event vectors */
144  session_fifo_event_t **pending_event_vector;
145 
146  /** per-worker postponed disconnects */
147  session_fifo_event_t **pending_disconnects;
148 
149  /** vpp fifo event queue */
150  unix_shared_memory_queue_t **vpp_event_queues;
151 
152  /** Unique segment name counter */
153  u32 unique_segment_name_counter;
154 
155  /** Per transport rx function that can either dequeue or peek */
156  session_fifo_rx_fn **session_tx_fns;
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 */
161  u32 *session_type_to_next;
162 
163  /** Session manager is enabled */
164  u8 is_enabled;
165 
166  /** vpp fifo event queue configured length */
167  u32 configured_event_queue_length;
168 
169  /*
170  * Config parameters
171  */
172 
173  /** session table size parameters */
174  u32 configured_v4_session_table_buckets;
175  u32 configured_v4_session_table_memory;
176  u32 configured_v4_halfopen_table_buckets;
177  u32 configured_v4_halfopen_table_memory;
178  u32 configured_v6_session_table_buckets;
179  u32 configured_v6_session_table_memory;
180  u32 configured_v6_halfopen_table_buckets;
181  u32 configured_v6_halfopen_table_memory;
182 
183  /** Transport table (preallocation) size parameters */
184  u32 local_endpoints_table_memory;
185  u32 local_endpoints_table_buckets;
186 
187  /** Preallocate session config parameter */
188  u32 preallocated_sessions;
189 
190 #if SESSION_DBG
191  /**
192  * last event poll time by thread
193  * Debug only. Will cause false cache-line sharing as-is
194  */
195  f64 *last_event_poll_by_thread;
196 #endif
197 
198 };
199 
202 
203 /*
204  * Session manager function
205  */
208 {
209  return &session_manager_main;
210 }
211 
213 stream_session_is_valid (u32 si, u8 thread_index)
214 {
215  stream_session_t *s;
216  s = pool_elt_at_index (session_manager_main.sessions[thread_index], si);
217  if (s->thread_index != thread_index || s->session_index != si
218  /* || s->server_rx_fifo->master_session_index != si
219  || s->server_tx_fifo->master_session_index != si
220  || s->server_rx_fifo->master_thread_index != thread_index
221  || s->server_tx_fifo->master_thread_index != thread_index */ )
222  return 0;
223  return 1;
224 }
225 
226 stream_session_t *session_alloc (u32 thread_index);
227 
229 session_get (u32 si, u32 thread_index)
230 {
231  ASSERT (stream_session_is_valid (si, thread_index));
232  return pool_elt_at_index (session_manager_main.sessions[thread_index], si);
233 }
234 
236 session_get_if_valid (u64 si, u32 thread_index)
237 {
238  if (thread_index >= vec_len (session_manager_main.sessions))
239  return 0;
240 
241  if (pool_is_free_index (session_manager_main.sessions[thread_index], si))
242  return 0;
243 
244  ASSERT (stream_session_is_valid (si, thread_index));
245  return pool_elt_at_index (session_manager_main.sessions[thread_index], si);
246 }
247 
250 {
251  return ((u64) s->thread_index << 32) | (u64) s->session_index;
252 }
253 
256 {
257  return handle & 0xFFFFFFFF;
258 }
259 
262 {
263  return handle >> 32;
264 }
265 
266 always_inline void
267 session_parse_handle (u64 handle, u32 * index, u32 * thread_index)
268 {
269  *index = session_index_from_handle (handle);
270  *thread_index = session_thread_from_handle (handle);
271 }
272 
275 {
277  return
278  pool_elt_at_index (smm->sessions[session_thread_from_handle (handle)],
279  session_index_from_handle (handle));
280 }
281 
284 {
285  return (s->session_type >> 1);
286 }
287 
290 {
291  return (proto << 1 | is_ip4);
292 }
293 
294 /**
295  * Acquires a lock that blocks a session pool from expanding.
296  *
297  * This is typically used for safely peeking into other threads'
298  * pools in order to clone elements. Lock should be dropped as soon
299  * as possible by calling @ref session_pool_remove_peeker.
300  *
301  * NOTE: Avoid using pool_elt_at_index while the lock is held because
302  * it may lead to free elt bitmap expansion/contraction!
303  */
304 always_inline void
306 {
308  if (thread_index == vlib_get_thread_index ())
309  return;
310  clib_spinlock_lock_if_init (&smm->peekers_readers_locks[thread_index]);
311  smm->session_peekers[thread_index] += 1;
312  if (smm->session_peekers[thread_index] == 1)
313  clib_spinlock_lock_if_init (&smm->peekers_write_locks[thread_index]);
314  clib_spinlock_unlock_if_init (&smm->peekers_readers_locks[thread_index]);
315 }
316 
317 always_inline void
319 {
321  if (thread_index == vlib_get_thread_index ())
322  return;
323  ASSERT (session_manager_main.session_peekers[thread_index] > 0);
324  clib_spinlock_lock_if_init (&smm->peekers_readers_locks[thread_index]);
325  smm->session_peekers[thread_index] -= 1;
326  if (smm->session_peekers[thread_index] == 0)
327  clib_spinlock_unlock_if_init (&smm->peekers_write_locks[thread_index]);
328  clib_spinlock_unlock_if_init (&smm->peekers_readers_locks[thread_index]);
329 }
330 
331 /**
332  * Get session from handle and 'lock' pool resize if not in same thread
333  *
334  * Caller should drop the peek 'lock' as soon as possible.
335  */
338 {
340  u32 thread_index = session_thread_from_handle (handle);
341  if (thread_index == vlib_get_thread_index ())
342  {
343  return pool_elt_at_index (smm->sessions[thread_index],
344  session_index_from_handle (handle));
345  }
346  else
347  {
348  session_pool_add_peeker (thread_index);
349  /* Don't use pool_elt_at index. See @ref session_pool_add_peeker */
350  return smm->sessions[thread_index] + session_index_from_handle (handle);
351  }
352 }
353 
356 {
357  return pool_elt_at_index (session_manager_main.listen_sessions[sst], si);
358 }
359 
362 {
363  if (s->session_state == SESSION_STATE_LISTENING)
364  return s - session_manager_main.listen_sessions[s->session_type];
365 
366  return s - session_manager_main.sessions[s->thread_index];
367 }
368 
371 {
372  stream_session_t *s = session_get (tc->s_index, tc->thread_index);
373  return svm_fifo_max_enqueue (s->server_rx_fifo);
374 }
375 
378 {
379  stream_session_t *s = session_get (tc->s_index, tc->thread_index);
380  return s->server_rx_fifo->nitems;
381 }
382 
385 {
386  return (s - session_manager_main.sessions[s->thread_index]);
387 }
388 
390 session_clone_safe (u32 session_index, u32 thread_index)
391 {
392  stream_session_t *old_s, *new_s;
393  u32 current_thread_index = vlib_get_thread_index ();
394 
395  /* If during the memcpy pool is reallocated AND the memory allocator
396  * decides to give the old chunk of memory to somebody in a hurry to
397  * scribble something on it, we have a problem. So add this thread as
398  * a session pool peeker.
399  */
400  session_pool_add_peeker (thread_index);
401  new_s = session_alloc (current_thread_index);
402  old_s = session_manager_main.sessions[thread_index] + session_index;
403  clib_memcpy (new_s, old_s, sizeof (*new_s));
404  session_pool_remove_peeker (thread_index);
405  new_s->thread_index = current_thread_index;
406  new_s->session_index = session_get_index (new_s);
407  return new_s;
408 }
409 
411 
413 
414 stream_session_t *session_alloc (u32 thread_index);
415 int
417  vlib_buffer_t * b, u32 offset,
418  u8 queue_event, u8 is_in_order);
420  u8 proto, u8 queue_event);
422  u32 offset, u32 max_bytes);
424 
427  u32 old_thread_index,
428  stream_session_t ** new_session);
430  u32 rx_pointer, u32 tx_pointer);
431 
436 int stream_session_accept (transport_connection_t * tc, u32 listener_index,
437  u8 notify);
438 int session_open (u32 app_index, session_endpoint_t * tep, u32 opaque);
443 void session_send_session_evt_to_thread (u64 session_handle,
444  fifo_event_type_t evt_type,
445  u32 thread_index);
446 
447 u8 *format_stream_session (u8 * s, va_list * args);
448 uword unformat_stream_session (unformat_input_t * input, va_list * args);
450  va_list * args);
451 
452 void session_register_transport (transport_proto_t transport_proto,
453  const transport_proto_vft_t * vft, u8 is_ip4,
454  u32 output_node);
455 
457 
460 {
461  return session_manager_main.vpp_event_queues[thread_index];
462 }
463 
464 int session_manager_flush_enqueue_events (u8 proto, u32 thread_index);
465 
468 {
469  ASSERT (s->session_state == SESSION_STATE_LISTENING);
470  return ((u64) s->session_type << 32) | s->session_index;
471 }
472 
475 {
477  stream_session_t *s;
478  u32 type, index;
479  type = handle >> 32;
480  index = handle & 0xFFFFFFFF;
481 
482  if (pool_is_free_index (smm->listen_sessions[type], index))
483  return 0;
484 
485  s = pool_elt_at_index (smm->listen_sessions[type], index);
486  ASSERT (s->session_state == SESSION_STATE_LISTENING);
487  return s;
488 }
489 
492 {
493  stream_session_t *s;
494  pool_get_aligned (session_manager_main.listen_sessions[type], s,
496  memset (s, 0, sizeof (*s));
497 
498  s->session_type = type;
499  s->session_state = SESSION_STATE_LISTENING;
500  s->session_index = s - session_manager_main.listen_sessions[type];
501 
502  return s;
503 }
504 
507 {
508  return pool_elt_at_index (session_manager_main.listen_sessions[type],
509  index);
510 }
511 
512 always_inline void
514 {
515  pool_put (session_manager_main.listen_sessions[s->session_type], s);
516 }
517 
519 
520 int
522  session_endpoint_t * sep);
523 
525 session_manager_get_listener (u8 session_type, u32 index)
526 {
527  return
528  pool_elt_at_index (session_manager_main.listen_sessions[session_type],
529  index);
530 }
531 
532 /**
533  * Set peek or dequeue function for given session type
534  *
535  * Reliable transport protocols will probably want to use a peek function
536  */
537 always_inline void
539 {
540  session_manager_main.session_tx_fns[type] = (is_peek) ?
541  session_tx_fifo_peek_and_snd : session_tx_fifo_dequeue_and_snd;
542 }
543 
546 {
547  return session_manager_main.is_enabled == 1;
548 }
549 
550 #define session_cli_return_if_not_enabled() \
551 do { \
552  if (!session_manager_main.is_enabled) \
553  return clib_error_return(0, "session layer is not enabled"); \
554 } while (0)
555 
556 void session_node_enable_disable (u8 is_en);
557 
558 #endif /* __included_session_h__ */
559 
560 /*
561  * fd.io coding-style-patch-verification: ON
562  *
563  * Local Variables:
564  * eval: (c-set-style "gnu")
565  * End:
566  */
static stream_session_t * listen_session_get_from_handle(u64 handle)
Definition: session.h:474
void * arg
Definition: session.h:86
struct _transport_connection transport_connection_t
int session_dgram_connect_notify(transport_connection_t *tc, u32 old_thread_index, stream_session_t **new_session)
Move dgram session to the right thread.
Definition: session.c:641
uword unformat_transport_connection(unformat_input_t *input, va_list *args)
Definition: session_cli.c:164
uword unformat_stream_session(unformat_input_t *input, va_list *args)
Definition: session_cli.c:133
static_always_inline void clib_spinlock_unlock_if_init(clib_spinlock_t *p)
Definition: lock.h:85
struct _transport_proto_vft transport_proto_vft_t
struct _vlib_node_registration vlib_node_registration_t
static stream_session_t * listen_session_new(session_type_t type)
Definition: session.h:491
int stream_session_accept(transport_connection_t *tc, u32 listener_index, u8 notify)
Accept a stream session.
Definition: session.c:761
int session_stream_connect_notify(transport_connection_t *tc, u8 is_fail)
Definition: session.c:549
static u32 svm_fifo_max_enqueue(svm_fifo_t *f)
Definition: svm_fifo.h:106
static void session_pool_remove_peeker(u32 thread_index)
Definition: session.h:318
void * fp
Definition: session.h:85
static u8 session_manager_is_enabled()
Definition: session.h:545
int listen_session_get_local_session_endpoint(stream_session_t *listener, session_endpoint_t *sep)
Definition: session.c:1046
static u32 stream_session_max_rx_enqueue(transport_connection_t *tc)
Definition: session.h:370
vlib_node_registration_t session_queue_node
(constructor) VLIB_REGISTER_NODE (session_queue_node)
Definition: session_node.c:46
session_fifo_rx_fn session_tx_fifo_peek_and_snd
struct _svm_fifo svm_fifo_t
fifo_event_type_t
Definition: session.h:32
typedef CLIB_PACKED(struct{union{svm_fifo_t *fifo;u64 session_handle;rpc_args_t rpc_args;};u8 event_type;u8 postponed;}) session_fifo_event_t
#define always_inline
Definition: clib.h:92
int session_open(u32 app_index, session_endpoint_t *tep, u32 opaque)
Ask transport to open connection to remote transport endpoint.
Definition: session.c:807
unsigned long u64
Definition: types.h:89
void stream_session_accept_notify(transport_connection_t *tc)
Definition: session.c:677
u32 stream_session_dequeue_drop(transport_connection_t *tc, u32 max_bytes)
Definition: session.c:427
struct _stream_session_t stream_session_t
u8 session_node_lookup_fifo_event(svm_fifo_t *f, session_fifo_event_t *e)
Definition: session_node.c:486
static transport_proto_t session_get_transport_proto(stream_session_t *s)
Definition: session.h:283
static void session_parse_handle(u64 handle, u32 *index, u32 *thread_index)
Definition: session.h:267
static void listen_session_del(stream_session_t *s)
Definition: session.h:513
static session_manager_main_t * vnet_get_session_manager_main()
Definition: session.h:207
#define pool_elt_at_index(p, i)
Returns pointer to element at given index.
Definition: pool.h:459
static u32 session_thread_from_handle(u64 handle)
Definition: session.h:261
struct _session_endpoint session_endpoint_t
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:999
struct _unformat_input_t unformat_input_t
static u32 session_get_index(stream_session_t *s)
Definition: session.h:384
void stream_session_init_fifos_pointers(transport_connection_t *tc, u32 rx_pointer, u32 tx_pointer)
Init fifo tail and head pointers.
Definition: session.c:539
#define pool_put(P, E)
Free an object E in pool P.
Definition: pool.h:271
static stream_session_t * session_manager_get_listener(u8 session_type, u32 index)
Definition: session.h:525
static stream_session_t * session_get_if_valid(u64 si, u32 thread_index)
Definition: session.h:236
struct _session_manager_main session_manager_main_t
Definition: session.h:103
static stream_session_t * session_get(u32 si, u32 thread_index)
Definition: session.h:229
static void session_pool_add_peeker(u32 thread_index)
Acquires a lock that blocks a session pool from expanding.
Definition: session.h:305
#define pool_get_aligned(P, E, A)
Allocate an object E from a pool P (general version).
Definition: pool.h:188
void session_node_enable_disable(u8 is_en)
Definition: session.c:1159
static unix_shared_memory_queue_t * session_manager_get_vpp_event_queue(u32 thread_index)
Definition: session.h:459
int session_manager_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:510
session_fifo_rx_fn session_tx_fifo_dequeue_and_snd
static_always_inline uword vlib_get_thread_index(void)
Definition: threads.h:221
static session_type_t session_type_from_proto_and_ip(transport_proto_t proto, u8 is_ip4)
Definition: session.h:289
vlib_main_t * vm
Definition: buffer.c:283
static u32 stream_session_get_index(stream_session_t *s)
Definition: session.h:361
u8 * format_stream_session(u8 *s, va_list *args)
Format stream session as per the following format.
Definition: session_cli.c:52
void stream_session_disconnect(stream_session_t *s)
Disconnect session and propagate to transport.
Definition: session.c:934
static stream_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:337
#define clib_memcpy(a, b, c)
Definition: string.h:75
int stream_session_stop_listen(stream_session_t *s)
Ask transport to stop listening on local transport endpoint.
Definition: session.c:904
#define pool_is_free_index(P, I)
Use free bitmap to query whether given index is free.
Definition: pool.h:268
session_manager_main_t session_manager_main
Definition: session.c:27
static void session_manager_set_transport_rx_fn(session_type_t type, u8 is_peek)
Set peek or dequeue function for given session type.
Definition: session.h:538
static u8 stream_session_is_valid(u32 si, u8 thread_index)
Definition: session.h:213
clib_error_t * vnet_session_enable_disable(vlib_main_t *vm, u8 is_en)
Definition: session.c:1171
void stream_session_delete_notify(transport_connection_t *tc)
Notification from transport that connection is being deleted.
Definition: session.c:732
void stream_session_cleanup(stream_session_t *s)
Cleanup transport and session state.
Definition: session.c:948
#define ASSERT(truth)
unsigned int u32
Definition: types.h:88
void stream_session_reset_notify(transport_connection_t *tc)
Notify application that connection has been reset.
Definition: session.c:747
u8 session_type_t
static const char * fifo_event_type_str(fifo_event_type_t et)
Definition: session.h:43
void session_send_session_evt_to_thread(u64 session_handle, fifo_event_type_t evt_type, u32 thread_index)
Definition: session.c:59
transport_connection_t * session_get_transport(stream_session_t *s)
Definition: session.c:1026
static stream_session_t * stream_session_listener_get(u8 sst, u64 si)
Definition: session.h:355
u32 stream_session_tx_fifo_max_dequeue(transport_connection_t *tc)
Definition: session.c:410
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:304
static u32 session_index_from_handle(u64 handle)
Definition: session.h:255
u64 uword
Definition: types.h:112
static stream_session_t * session_get_from_handle(u64 handle)
Definition: session.h:274
static u64 session_handle(stream_session_t *s)
Definition: session.h:249
int session_enqueue_dgram_connection(stream_session_t *s, vlib_buffer_t *b, u8 proto, u8 queue_event)
Definition: session.c:359
enum _transport_proto transport_proto_t
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
double f64
Definition: types.h:142
static stream_session_t * listen_session_get(session_type_t type, u32 index)
Definition: session.h:506
stream_session_t * session_alloc(u32 thread_index)
Definition: session.c:80
unsigned char u8
Definition: types.h:56
static stream_session_t * session_clone_safe(u32 session_index, u32 thread_index)
Definition: session.h:390
session_error_t
Definition: session.h:75
#define foreach_session_input_error
Definition: session.h:64
static u32 stream_session_rx_fifo_size(transport_connection_t *tc)
Definition: session.h:377
int stream_session_listen(stream_session_t *s, session_endpoint_t *tep)
Ask transport to listen on local transport endpoint.
Definition: session.c:872
int stream_session_peek_bytes(transport_connection_t *tc, u8 *buffer, u32 offset, u32 max_bytes)
Definition: session.c:419
int( session_fifo_rx_fn)(vlib_main_t *vm, vlib_node_runtime_t *node, session_manager_main_t *smm, session_fifo_event_t *e0, stream_session_t *s0, u32 thread_index, int *n_tx_pkts)
Definition: session.h:106
#define CLIB_CACHE_LINE_BYTES
Definition: cache.h:67
transport_connection_t * listen_session_get_transport(stream_session_t *s)
Definition: session.c:1039
static_always_inline void clib_spinlock_lock_if_init(clib_spinlock_t *p)
Definition: lock.h:65
static u64 listen_session_get_handle(stream_session_t *s)
Definition: session.h:467
void stream_session_disconnect_notify(transport_connection_t *tc)
Notification from transport that connection is being closed.
Definition: session.c:695
struct _unix_shared_memory_queue unix_shared_memory_queue_t