Fix: sessiond: null pointer dereference on initial evaluation of session
[lttng-tools.git] / src / bin / lttng-sessiond / ust-app.hpp
1 /*
2 * Copyright (C) 2011 EfficiOS Inc.
3 * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0-only
6 *
7 */
8
9 #ifndef _LTT_UST_APP_H
10 #define _LTT_UST_APP_H
11
12 #include <stdint.h>
13
14 #include <common/index-allocator.hpp>
15 #include <common/format.hpp>
16 #include <common/uuid.hpp>
17
18 #include "trace-ust.hpp"
19 #include "ust-registry.hpp"
20 #include "ust-registry-session.hpp"
21 #include "session.hpp"
22
23 #define UST_APP_EVENT_LIST_SIZE 32
24
25 /* Process name (short). */
26 #define UST_APP_PROCNAME_LEN 16
27
28 struct lttng_bytecode;
29 struct lttng_ust_filter_bytecode;
30
31 extern int the_ust_consumerd64_fd, the_ust_consumerd32_fd;
32
33 /*
34 * Object used to close the notify socket in a call_rcu(). Since the
35 * application might not be found, we need an independant object containing the
36 * notify socket fd.
37 */
38 struct ust_app_notify_sock_obj {
39 int fd;
40 struct rcu_head head;
41 };
42
43 struct ust_app_ht_key {
44 const char *name;
45 const struct lttng_bytecode *filter;
46 enum lttng_ust_abi_loglevel_type loglevel_type;
47 const struct lttng_event_exclusion *exclusion;
48 };
49
50 /*
51 * Application registration data structure.
52 */
53 struct ust_register_msg {
54 enum lttng_ust_ctl_socket_type type;
55 uint32_t major;
56 uint32_t minor;
57 uint32_t abi_major;
58 uint32_t abi_minor;
59 pid_t pid;
60 pid_t ppid;
61 uid_t uid;
62 gid_t gid;
63 uint32_t bits_per_long;
64 uint32_t uint8_t_alignment;
65 uint32_t uint16_t_alignment;
66 uint32_t uint32_t_alignment;
67 uint32_t uint64_t_alignment;
68 uint32_t long_alignment;
69 int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
70 char name[LTTNG_UST_ABI_PROCNAME_LEN];
71 };
72
73 /*
74 * Global applications HT used by the session daemon. This table is indexed by
75 * PID using the pid_n node and pid value of an ust_app.
76 */
77 extern struct lttng_ht *ust_app_ht;
78
79 /*
80 * Global applications HT used by the session daemon. This table is indexed by
81 * socket using the sock_n node and sock value of an ust_app.
82 *
83 * The 'sock' in question here is the 'command' socket.
84 */
85 extern struct lttng_ht *ust_app_ht_by_sock;
86
87 /*
88 * Global applications HT used by the session daemon. This table is indexed by
89 * socket using the notify_sock_n node and notify_sock value of an ust_app.
90 */
91 extern struct lttng_ht *ust_app_ht_by_notify_sock;
92
93 /* Stream list containing ust_app_stream. */
94 struct ust_app_stream_list {
95 unsigned int count;
96 struct cds_list_head head;
97 };
98
99 struct ust_app_ctx {
100 int handle;
101 struct lttng_ust_context_attr ctx;
102 struct lttng_ust_abi_object_data *obj;
103 struct lttng_ht_node_ulong node;
104 struct cds_list_head list;
105 };
106
107 struct ust_app_event {
108 int enabled;
109 int handle;
110 struct lttng_ust_abi_object_data *obj;
111 struct lttng_ust_abi_event attr;
112 char name[LTTNG_UST_ABI_SYM_NAME_LEN];
113 struct lttng_ht_node_str node;
114 struct lttng_bytecode *filter;
115 struct lttng_event_exclusion *exclusion;
116 };
117
118 struct ust_app_event_notifier_rule {
119 int enabled;
120 uint64_t error_counter_index;
121 int handle;
122 struct lttng_ust_abi_object_data *obj;
123 /* Holds a strong reference. */
124 struct lttng_trigger *trigger;
125 /* Unique ID returned by the tracer to identify this event notifier. */
126 uint64_t token;
127 struct lttng_ht_node_u64 node;
128 /* The trigger object owns the filter. */
129 const struct lttng_bytecode *filter;
130 /* Owned by this. */
131 struct lttng_event_exclusion *exclusion;
132 /* For delayed reclaim. */
133 struct rcu_head rcu_head;
134 };
135
136 struct ust_app_stream {
137 int handle;
138 char pathname[PATH_MAX];
139 /* Format is %s_%d respectively channel name and CPU number. */
140 char name[DEFAULT_STREAM_NAME_LEN];
141 struct lttng_ust_abi_object_data *obj;
142 /* Using a list of streams to keep order. */
143 struct cds_list_head list;
144 };
145
146 struct ust_app_channel {
147 int enabled;
148 int handle;
149 /*
150 * Unique key used to identify the channel on the consumer side.
151 * 0 is a reserved 'invalid' value used to indicate that the consumer
152 * does not know about this channel (i.e. an error occurred).
153 */
154 uint64_t key;
155 /* Id of the tracing channel set on creation. */
156 uint64_t tracing_channel_id;
157 /* Number of stream that this channel is expected to receive. */
158 unsigned int expected_stream_count;
159 char name[LTTNG_UST_ABI_SYM_NAME_LEN];
160 struct lttng_ust_abi_object_data *obj;
161 struct lttng_ust_ctl_consumer_channel_attr attr;
162 struct ust_app_stream_list streams;
163 /* Session pointer that owns this object. */
164 struct ust_app_session *session;
165 /*
166 * Contexts are kept in a hash table for fast lookup and in an ordered list
167 * so we are able to enable them on the tracer side in the same order the
168 * user added them.
169 */
170 struct lttng_ht *ctx;
171 struct cds_list_head ctx_list;
172
173 struct lttng_ht *events;
174 uint64_t tracefile_size;
175 uint64_t tracefile_count;
176 uint64_t monitor_timer_interval;
177 /*
178 * Node indexed by channel name in the channels' hash table of a session.
179 */
180 struct lttng_ht_node_str node;
181 /*
182 * Node indexed by UST channel object descriptor (handle). Stored in the
183 * ust_objd hash table in the ust_app object.
184 */
185 struct lttng_ht_node_ulong ust_objd_node;
186 /* For delayed reclaim */
187 struct rcu_head rcu_head;
188 };
189
190 struct ust_app_session {
191 /*
192 * Lock protecting this session's ust app interaction. Held
193 * across command send/recv to/from app. Never nests within the
194 * session registry lock.
195 */
196 pthread_mutex_t lock;
197
198 int enabled;
199 /* started: has the session been in started state at any time ? */
200 int started; /* allows detection of start vs restart. */
201 int handle; /* used has unique identifier for app session */
202
203 bool deleted; /* Session deleted flag. Check with lock held. */
204
205 /*
206 * Tracing session ID. Multiple ust app session can have the same tracing
207 * session id making this value NOT unique to the object.
208 */
209 uint64_t tracing_id;
210 uint64_t id; /* Unique session identifier */
211 struct lttng_ht *channels; /* Registered channels */
212 struct lttng_ht_node_u64 node;
213 /*
214 * Node indexed by UST session object descriptor (handle). Stored in the
215 * ust_sessions_objd hash table in the ust_app object.
216 */
217 struct lttng_ht_node_ulong ust_objd_node;
218 /* Starts with 'ust'; no leading slash. */
219 char path[PATH_MAX];
220 /* UID/GID of the application owning the session */
221 struct lttng_credentials real_credentials;
222 /* Effective UID and GID. Same as the tracing session. */
223 struct lttng_credentials effective_credentials;
224 struct cds_list_head teardown_node;
225 /*
226 * Once at least *one* session is created onto the application, the
227 * corresponding consumer is set so we can use it on unregistration.
228 */
229 struct consumer_output *consumer;
230 enum lttng_buffer_type buffer_type;
231 /* ABI of the session. Same value as the application. */
232 uint32_t bits_per_long;
233 /* For delayed reclaim */
234 struct rcu_head rcu_head;
235 /* If the channel's streams have to be outputed or not. */
236 unsigned int output_traces;
237 unsigned int live_timer_interval; /* usec */
238
239 /* Metadata channel attributes. */
240 struct lttng_ust_ctl_consumer_channel_attr metadata_attr;
241
242 char root_shm_path[PATH_MAX];
243 char shm_path[PATH_MAX];
244 };
245
246 /*
247 * Registered traceable applications. Libust registers to the session daemon
248 * and a linked list is kept of all running traceable app.
249 */
250 struct ust_app {
251 int sock;
252 pthread_mutex_t sock_lock; /* Protects sock protocol. */
253
254 int notify_sock;
255 pid_t pid;
256 pid_t ppid;
257 uid_t uid; /* User ID that owns the apps */
258 gid_t gid; /* Group ID that owns the apps */
259
260 /* App ABI. */
261 lttng::sessiond::trace::abi abi;
262
263 int compatible; /* If the lttng-ust tracer version does not match the
264 supported version of the session daemon, this flag is
265 set to 0 (NOT compatible) else 1. */
266 struct lttng_ust_abi_tracer_version version;
267 uint32_t v_major; /* Version major number */
268 uint32_t v_minor; /* Version minor number */
269 /* Extra for the NULL byte. */
270 char name[UST_APP_PROCNAME_LEN + 1];
271 /* Type of buffer this application uses. */
272 enum lttng_buffer_type buffer_type;
273 struct lttng_ht *sessions;
274 struct lttng_ht_node_ulong pid_n;
275 struct lttng_ht_node_ulong sock_n;
276 struct lttng_ht_node_ulong notify_sock_n;
277 /*
278 * This is a list of ust app session that, once the app is going into
279 * teardown mode, in the RCU call, each node in this list is removed and
280 * deleted.
281 *
282 * Element of the list are added when an application unregisters after each
283 * ht_del of ust_app_session associated to this app. This list is NOT used
284 * when a session is destroyed.
285 */
286 struct cds_list_head teardown_head;
287 /*
288 * Hash table containing ust_app_channel indexed by channel objd.
289 */
290 struct lttng_ht *ust_objd;
291 /*
292 * Hash table containing ust_app_session indexed by objd.
293 */
294 struct lttng_ht *ust_sessions_objd;
295
296 /*
297 * If this application is of the agent domain and this is non negative then
298 * a lookup MUST be done to acquire a read side reference to the
299 * corresponding agent app object. If the lookup fails, this should be set
300 * to a negative value indicating that the agent application is gone.
301 */
302 int agent_app_sock;
303 /*
304 * Time at which the app is registred.
305 * Used for path creation
306 */
307 time_t registration_time;
308 /*
309 * Event notifier
310 */
311 struct {
312 /*
313 * Handle to the lttng_ust object representing the event
314 * notifier group.
315 */
316 struct lttng_ust_abi_object_data *object;
317 struct lttng_pipe *event_pipe;
318 struct lttng_ust_abi_object_data *counter;
319 struct lttng_ust_abi_object_data **counter_cpu;
320 int nr_counter_cpu;
321 } event_notifier_group;
322 /*
323 * Hashtable indexing the application's event notifier rule's
324 * (ust_app_event_notifier_rule) by their token's value.
325 */
326 struct lttng_ht *token_to_event_notifier_rule_ht;
327 };
328
329 /*
330 * Due to a bug in g++ < 7.1, this specialization must be enclosed in the fmt namespace,
331 * see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480.
332 */
333 namespace fmt {
334 template <>
335 struct formatter<ust_app> : formatter<std::string> {
336 template <typename FormatCtx>
337 typename FormatCtx::iterator format(const ust_app& app, FormatCtx& ctx)
338 {
339 return format_to(ctx.out(),
340 "{{ procname = `{}`, ppid = {}, pid = {}, uid = {}, gid = {}, version = {}.{}, registration time = {} }}",
341 app.name, app.ppid, app.pid, app.uid, app.gid, app.v_major,
342 app.v_minor,
343 lttng::utils::time_to_iso8601_str(app.registration_time));
344 }
345 };
346 } /* namespace fmt */
347
348 #ifdef HAVE_LIBLTTNG_UST_CTL
349
350 int ust_app_register(struct ust_register_msg *msg, int sock);
351 int ust_app_register_done(struct ust_app *app);
352 int ust_app_version(struct ust_app *app);
353 void ust_app_unregister(int sock);
354 int ust_app_start_trace_all(struct ltt_ust_session *usess);
355 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
356 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
357 int ust_app_list_events(struct lttng_event **events);
358 int ust_app_list_event_fields(struct lttng_event_field **fields);
359 int ust_app_create_event_glb(struct ltt_ust_session *usess,
360 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
361 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
362 struct ltt_ust_channel *uchan);
363 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
364 struct ltt_ust_channel *uchan);
365 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
366 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
367 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
368 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
369 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
370 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
371 void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app);
372 void ust_app_global_update_all(struct ltt_ust_session *usess);
373 void ust_app_global_update_event_notifier_rules(struct ust_app *app);
374 void ust_app_global_update_all_event_notifier_rules(void);
375
376 void ust_app_clean_list(void);
377 int ust_app_ht_alloc(void);
378 struct ust_app *ust_app_find_by_pid(pid_t pid);
379 struct ust_app_stream *ust_app_alloc_stream(void);
380 int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
381 int ust_app_recv_notify(int sock);
382 void ust_app_add(struct ust_app *app);
383 struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock);
384 void ust_app_notify_sock_unregister(int sock);
385 ssize_t ust_app_push_metadata(const lttng::sessiond::ust::registry_session::locked_ptr& registry,
386 struct consumer_socket *socket,
387 int send_zero_data);
388 void ust_app_destroy(struct ust_app *app);
389 enum lttng_error_code ust_app_snapshot_record(
390 const struct ltt_ust_session *usess,
391 const struct consumer_output *output,
392 uint64_t nb_packets_per_stream);
393 uint64_t ust_app_get_size_one_more_packet_per_stream(
394 const struct ltt_ust_session *usess, uint64_t cur_nr_packets);
395 struct ust_app *ust_app_find_by_sock(int sock);
396 int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
397 struct cds_list_head *buffer_reg_uid_list,
398 struct consumer_output *consumer, uint64_t uchan_id,
399 int overwrite, uint64_t *discarded, uint64_t *lost);
400 int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
401 struct ltt_ust_channel *uchan,
402 struct consumer_output *consumer,
403 int overwrite, uint64_t *discarded, uint64_t *lost);
404 int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess);
405 enum lttng_error_code ust_app_rotate_session(struct ltt_session *session);
406 enum lttng_error_code ust_app_create_channel_subdirectories(
407 const struct ltt_ust_session *session);
408 int ust_app_release_object(struct ust_app *app,
409 struct lttng_ust_abi_object_data *data);
410 enum lttng_error_code ust_app_clear_session(struct ltt_session *session);
411 enum lttng_error_code ust_app_open_packets(struct ltt_session *session);
412
413 int ust_app_setup_event_notifier_group(struct ust_app *app);
414
415 static inline
416 int ust_app_supported(void)
417 {
418 return 1;
419 }
420
421 bool ust_app_supports_notifiers(const struct ust_app *app);
422 bool ust_app_supports_counters(const struct ust_app *app);
423
424 #else /* HAVE_LIBLTTNG_UST_CTL */
425
426 static inline
427 int ust_app_destroy_trace_all(
428 struct ltt_ust_session *usess __attribute__((unused)))
429 {
430 return 0;
431 }
432
433 static inline
434 int ust_app_start_trace(
435 struct ltt_ust_session *usess __attribute__((unused)),
436 struct ust_app *app __attribute__((unused)))
437 {
438 return 0;
439 }
440
441 static inline
442 int ust_app_start_trace_all(
443 struct ltt_ust_session *usess __attribute__((unused)))
444 {
445 return 0;
446 }
447
448 static inline
449 int ust_app_stop_trace_all(
450 struct ltt_ust_session *usess __attribute__((unused)))
451 {
452 return 0;
453 }
454
455 static inline
456 int ust_app_list_events(
457 struct lttng_event **events __attribute__((unused)))
458 {
459 return -ENOSYS;
460 }
461
462 static inline
463 int ust_app_list_event_fields(
464 struct lttng_event_field **fields __attribute__((unused)))
465 {
466 return -ENOSYS;
467 }
468
469 static inline
470 int ust_app_register(
471 struct ust_register_msg *msg __attribute__((unused)),
472 int sock __attribute__((unused)))
473 {
474 return -ENOSYS;
475 }
476
477 static inline
478 int ust_app_register_done(struct ust_app *app __attribute__((unused)))
479 {
480 return -ENOSYS;
481 }
482
483 static inline
484 int ust_app_version(struct ust_app *app __attribute__((unused)))
485 {
486 return -ENOSYS;
487 }
488
489 static inline
490 void ust_app_unregister(int sock __attribute__((unused)))
491 {
492 }
493
494 static inline
495 void ust_app_clean_list(void)
496 {
497 }
498
499 static inline
500 struct ust_app_list *ust_app_get_list(void)
501 {
502 return NULL;
503 }
504
505 static inline
506 struct ust_app *ust_app_get_by_pid(pid_t pid __attribute__((unused)))
507 {
508 return NULL;
509 }
510
511 static inline
512 int ust_app_ht_alloc(void)
513 {
514 return 0;
515 }
516
517 static inline
518 void ust_app_global_update(
519 struct ltt_ust_session *usess __attribute__((unused)),
520 struct ust_app *app __attribute__((unused)))
521 {}
522
523 static inline
524 void ust_app_global_update_event_notifier_rules(
525 struct ust_app *app __attribute__((unused)))
526 {}
527
528 static inline
529 void ust_app_global_update_all_event_notifier_rules(void)
530 {}
531
532 static inline
533 int ust_app_setup_event_notifier_group(
534 struct ust_app *app __attribute__((unused)))
535 {
536 return 0;
537 }
538
539 static inline
540 int ust_app_disable_channel_glb(
541 struct ltt_ust_session *usess __attribute__((unused)),
542 struct ltt_ust_channel *uchan __attribute__((unused)))
543 {
544 return 0;
545 }
546
547 static inline
548 int ust_app_enable_channel_glb(
549 struct ltt_ust_session *usess __attribute__((unused)),
550 struct ltt_ust_channel *uchan __attribute__((unused)))
551 {
552 return 0;
553 }
554
555 static inline
556 int ust_app_create_event_glb(
557 struct ltt_ust_session *usess __attribute__((unused)),
558 struct ltt_ust_channel *uchan __attribute__((unused)),
559 struct ltt_ust_event *uevent __attribute__((unused)))
560 {
561 return 0;
562 }
563
564 static inline
565 int ust_app_disable_event_glb(
566 struct ltt_ust_session *usess __attribute__((unused)),
567 struct ltt_ust_channel *uchan __attribute__((unused)),
568 struct ltt_ust_event *uevent __attribute__((unused)))
569 {
570 return 0;
571 }
572
573 static inline
574 int ust_app_enable_event_glb(
575 struct ltt_ust_session *usess __attribute__((unused)),
576 struct ltt_ust_channel *uchan __attribute__((unused)),
577 struct ltt_ust_event *uevent __attribute__((unused)))
578 {
579 return 0;
580 }
581
582 static inline
583 int ust_app_add_ctx_channel_glb(
584 struct ltt_ust_session *usess __attribute__((unused)),
585 struct ltt_ust_channel *uchan __attribute__((unused)),
586 struct ltt_ust_context *uctx __attribute__((unused)))
587 {
588 return 0;
589 }
590
591 static inline
592 int ust_app_enable_event_pid(
593 struct ltt_ust_session *usess __attribute__((unused)),
594 struct ltt_ust_channel *uchan __attribute__((unused)),
595 struct ltt_ust_event *uevent __attribute__((unused)),
596 pid_t pid __attribute__((unused)))
597 {
598 return 0;
599 }
600
601 static inline
602 int ust_app_recv_registration(
603 int sock __attribute__((unused)),
604 struct ust_register_msg *msg __attribute__((unused)))
605 {
606 return 0;
607 }
608
609 static inline
610 int ust_app_recv_notify(int sock __attribute__((unused)))
611 {
612 return 0;
613 }
614
615 static inline
616 struct ust_app *ust_app_create(
617 struct ust_register_msg *msg __attribute__((unused)),
618 int sock __attribute__((unused)))
619 {
620 return NULL;
621 }
622
623 static inline
624 void ust_app_add(struct ust_app *app __attribute__((unused)))
625 {
626 }
627
628 static inline
629 void ust_app_notify_sock_unregister(int sock __attribute__((unused)))
630 {
631 }
632
633 static inline
634 ssize_t ust_app_push_metadata(
635 lttng::sessiond::ust::registry_session *registry __attribute__((unused)),
636 struct consumer_socket *socket __attribute__((unused)),
637 int send_zero_data __attribute__((unused)))
638 {
639 return 0;
640 }
641
642 static inline
643 void ust_app_destroy(struct ust_app *app __attribute__((unused)))
644 {
645 return;
646 }
647
648 static inline
649 enum lttng_error_code ust_app_snapshot_record(
650 struct ltt_ust_session *usess __attribute__((unused)),
651 const struct consumer_output *output __attribute__((unused)),
652 uint64_t max_stream_size __attribute__((unused)))
653 {
654 return LTTNG_ERR_UNK;
655 }
656
657 static inline
658 unsigned int ust_app_get_nb_stream(
659 struct ltt_ust_session *usess __attribute__((unused)))
660 {
661 return 0;
662 }
663
664 static inline
665 void ust_app_update_event_notifier_error_count(
666 struct lttng_trigger *lttng_trigger __attribute__((unused)))
667 {
668 return;
669 }
670
671 static inline
672 int ust_app_supported(void)
673 {
674 return 0;
675 }
676
677 static inline
678 bool ust_app_supports_notifiers(
679 const struct ust_app *app __attribute__((unused)))
680 {
681 return false;
682 }
683
684 static inline
685 bool ust_app_supports_counters(
686 const struct ust_app *app __attribute__((unused)))
687 {
688 return false;
689 }
690
691 static inline
692 struct ust_app *ust_app_find_by_sock(int sock __attribute__((unused)))
693 {
694 return NULL;
695 }
696
697 static inline
698 struct ust_app *ust_app_find_by_pid(pid_t pid __attribute__((unused)))
699 {
700 return NULL;
701 }
702
703 static inline
704 uint64_t ust_app_get_size_one_more_packet_per_stream(
705 const struct ltt_ust_session *usess __attribute__((unused)),
706 uint64_t cur_nr_packets __attribute__((unused))) {
707 return 0;
708 }
709
710 static inline
711 int ust_app_uid_get_channel_runtime_stats(
712 uint64_t ust_session_id __attribute__((unused)),
713 struct cds_list_head *buffer_reg_uid_list __attribute__((unused)),
714 struct consumer_output *consumer __attribute__((unused)),
715 int overwrite __attribute__((unused)),
716 uint64_t uchan_id __attribute__((unused)),
717 uint64_t *discarded __attribute__((unused)),
718 uint64_t *lost __attribute__((unused)))
719 {
720 return 0;
721 }
722
723 static inline
724 int ust_app_pid_get_channel_runtime_stats(
725 struct ltt_ust_session *usess __attribute__((unused)),
726 struct ltt_ust_channel *uchan __attribute__((unused)),
727 struct consumer_output *consumer __attribute__((unused)),
728 int overwrite __attribute__((unused)),
729 uint64_t *discarded __attribute__((unused)),
730 uint64_t *lost __attribute__((unused)))
731 {
732 return 0;
733 }
734
735 static inline
736 int ust_app_regenerate_statedump_all(
737 struct ltt_ust_session *usess __attribute__((unused)))
738 {
739 return 0;
740 }
741
742 static inline
743 enum lttng_error_code ust_app_rotate_session(
744 struct ltt_session *session __attribute__((unused)))
745 {
746 return LTTNG_ERR_UNK;
747 }
748
749 static inline
750 enum lttng_error_code ust_app_create_channel_subdirectories(
751 const struct ltt_ust_session *session __attribute__((unused)))
752 {
753 return LTTNG_ERR_UNK;
754 }
755
756 static inline
757 int ust_app_release_object(struct ust_app *app __attribute__((unused)),
758 struct lttng_ust_abi_object_data *data __attribute__((unused)))
759 {
760 return 0;
761 }
762
763 static inline
764 enum lttng_error_code ust_app_clear_session(
765 struct ltt_session *session __attribute__((unused)))
766 {
767 return LTTNG_ERR_UNK;
768 }
769
770 static inline
771 enum lttng_error_code ust_app_open_packets(
772 struct ltt_session *session __attribute__((unused)))
773 {
774 return LTTNG_ERR_UNK;
775 }
776
777 #endif /* HAVE_LIBLTTNG_UST_CTL */
778
779 #endif /* _LTT_UST_APP_H */
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