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 #include "ust-field-convert.hpp"
  23
  24 #define UST_APP_EVENT_LIST_SIZE 32
  25
  26 /* Process name (short). */
  27 #define UST_APP_PROCNAME_LEN    16
  28
  29 struct lttng_bytecode;
  30 struct lttng_ust_filter_bytecode;
  31
  32 extern int the_ust_consumerd64_fd, the_ust_consumerd32_fd;
  33
  34 /*
  35  * Object used to close the notify socket in a call_rcu(). Since the
  36  * application might not be found, we need an independant object containing the
  37  * notify socket fd.
  38  */
  39 struct ust_app_notify_sock_obj {
  40         int fd;
  41         struct rcu_head head;
  42 };
  43
  44 struct ust_app_ht_key {
  45         const char *name;
  46         const struct lttng_bytecode *filter;
  47         enum lttng_ust_abi_loglevel_type loglevel_type;
  48         const struct lttng_event_exclusion *exclusion;
  49 };
  50
  51 /*
  52  * Application registration data structure.
  53  */
  54 struct ust_register_msg {
  55         enum lttng_ust_ctl_socket_type type;
  56         uint32_t major;
  57         uint32_t minor;
  58         uint32_t abi_major;
  59         uint32_t abi_minor;
  60         pid_t pid;
  61         pid_t ppid;
  62         uid_t uid;
  63         gid_t gid;
  64         uint32_t bits_per_long;
  65         uint32_t uint8_t_alignment;
  66         uint32_t uint16_t_alignment;
  67         uint32_t uint32_t_alignment;
  68         uint32_t uint64_t_alignment;
  69         uint32_t long_alignment;
  70         int byte_order;         /* BIG_ENDIAN or LITTLE_ENDIAN */
  71         char name[LTTNG_UST_ABI_PROCNAME_LEN];
  72 };
  73
  74 /*
  75  * Global applications HT used by the session daemon. This table is indexed by
  76  * PID using the pid_n node and pid value of an ust_app.
  77  */
  78 extern struct lttng_ht *ust_app_ht;
  79
  80 /*
  81  * Global applications HT used by the session daemon. This table is indexed by
  82  * socket using the sock_n node and sock value of an ust_app.
  83  *
  84  * The 'sock' in question here is the 'command' socket.
  85  */
  86 extern struct lttng_ht *ust_app_ht_by_sock;
  87
  88 /*
  89  * Global applications HT used by the session daemon. This table is indexed by
  90  * socket using the notify_sock_n node and notify_sock value of an ust_app.
  91  */
  92 extern struct lttng_ht *ust_app_ht_by_notify_sock;
  93
  94 /* Stream list containing ust_app_stream. */
  95 struct ust_app_stream_list {
  96         unsigned int count;
  97         struct cds_list_head head;
  98 };
  99
 100 struct ust_app_ctx {
 101         int handle;
 102         struct lttng_ust_context_attr ctx;
 103         struct lttng_ust_abi_object_data *obj;
 104         struct lttng_ht_node_ulong node;
 105         struct cds_list_head list;
 106 };
 107
 108 struct ust_app_event {
 109         bool enabled;
 110         int handle;
 111         struct lttng_ust_abi_object_data *obj;
 112         struct lttng_ust_abi_event attr;
 113         char name[LTTNG_UST_ABI_SYM_NAME_LEN];
 114         struct lttng_ht_node_str node;
 115         struct lttng_bytecode *filter;
 116         struct lttng_event_exclusion *exclusion;
 117 };
 118
 119 struct ust_app_event_notifier_rule {
 120         bool enabled;
 121         uint64_t error_counter_index;
 122         int handle;
 123         struct lttng_ust_abi_object_data *obj;
 124         /* Holds a strong reference. */
 125         struct lttng_trigger *trigger;
 126         /* Unique ID returned by the tracer to identify this event notifier. */
 127         uint64_t token;
 128         struct lttng_ht_node_u64 node;
 129         /* The trigger object owns the filter. */
 130         const struct lttng_bytecode *filter;
 131         /* Owned by this. */
 132         struct lttng_event_exclusion *exclusion;
 133         /* For delayed reclaim. */
 134         struct rcu_head rcu_head;
 135 };
 136
 137 struct ust_app_stream {
 138         int handle;
 139         char pathname[PATH_MAX];
 140         /* Format is %s_%d respectively channel name and CPU number. */
 141         char name[DEFAULT_STREAM_NAME_LEN];
 142         struct lttng_ust_abi_object_data *obj;
 143         /* Using a list of streams to keep order. */
 144         struct cds_list_head list;
 145 };
 146
 147 struct ust_app_channel {
 148         bool enabled;
 149         int handle;
 150         /*
 151          * Unique key used to identify the channel on the consumer side.
 152          * 0 is a reserved 'invalid' value used to indicate that the consumer
 153          * does not know about this channel (i.e. an error occurred).
 154          */
 155         uint64_t key;
 156         /* Id of the tracing channel set on creation. */
 157         uint64_t tracing_channel_id;
 158         /* Number of stream that this channel is expected to receive. */
 159         unsigned int expected_stream_count;
 160         char name[LTTNG_UST_ABI_SYM_NAME_LEN];
 161         struct lttng_ust_abi_object_data *obj;
 162         struct lttng_ust_ctl_consumer_channel_attr attr;
 163         struct ust_app_stream_list streams;
 164         /* Session pointer that owns this object. */
 165         struct ust_app_session *session;
 166         /*
 167          * Contexts are kept in a hash table for fast lookup and in an ordered list
 168          * so we are able to enable them on the tracer side in the same order the
 169          * user added them.
 170          */
 171         struct lttng_ht *ctx;
 172         struct cds_list_head ctx_list;
 173
 174         struct lttng_ht *events;
 175         uint64_t tracefile_size;
 176         uint64_t tracefile_count;
 177         uint64_t monitor_timer_interval;
 178         /*
 179          * Node indexed by channel name in the channels' hash table of a session.
 180          */
 181         struct lttng_ht_node_str node;
 182         /*
 183          * Node indexed by UST channel object descriptor (handle). Stored in the
 184          * ust_objd hash table in the ust_app object.
 185          */
 186         struct lttng_ht_node_ulong ust_objd_node;
 187         /* For delayed reclaim */
 188         struct rcu_head rcu_head;
 189 };
 190
 191 struct ust_app_session {
 192         /*
 193          * Lock protecting this session's ust app interaction. Held
 194          * across command send/recv to/from app. Never nests within the
 195          * session registry lock.
 196          */
 197         pthread_mutex_t lock;
 198
 199         bool enabled;
 200         /* started: has the session been in started state at any time ? */
 201         bool started;  /* allows detection of start vs restart. */
 202         int handle;   /* used has unique identifier for app session */
 203
 204         bool deleted;   /* Session deleted flag. Check with lock held. */
 205
 206         /*
 207          * Tracing session ID. Multiple ust app session can have the same tracing
 208          * session id making this value NOT unique to the object.
 209          */
 210         uint64_t tracing_id;
 211         uint64_t id;    /* Unique session identifier */
 212         struct lttng_ht *channels; /* Registered channels */
 213         struct lttng_ht_node_u64 node;
 214         /*
 215          * Node indexed by UST session object descriptor (handle). Stored in the
 216          * ust_sessions_objd hash table in the ust_app object.
 217          */
 218         struct lttng_ht_node_ulong ust_objd_node;
 219         /* Starts with 'ust'; no leading slash. */
 220         char path[PATH_MAX];
 221         /* UID/GID of the application owning the session */
 222         struct lttng_credentials real_credentials;
 223         /* Effective UID and GID. Same as the tracing session. */
 224         struct lttng_credentials effective_credentials;
 225         struct cds_list_head teardown_node;
 226         /*
 227          * Once at least *one* session is created onto the application, the
 228          * corresponding consumer is set so we can use it on unregistration.
 229          */
 230         struct consumer_output *consumer;
 231         enum lttng_buffer_type buffer_type;
 232         /* ABI of the session. Same value as the application. */
 233         uint32_t bits_per_long;
 234         /* For delayed reclaim */
 235         struct rcu_head rcu_head;
 236         /* If the channel's streams have to be outputed or not. */
 237         unsigned int output_traces;
 238         unsigned int live_timer_interval;       /* usec */
 239
 240         /* Metadata channel attributes. */
 241         struct lttng_ust_ctl_consumer_channel_attr metadata_attr;
 242
 243         char root_shm_path[PATH_MAX];
 244         char shm_path[PATH_MAX];
 245 };
 246
 247 /*
 248  * Registered traceable applications. Libust registers to the session daemon
 249  * and a linked list is kept of all running traceable app.
 250  */
 251 struct ust_app {
 252         /* Traffic initiated from the session daemon to the application. */
 253         int sock;
 254         pthread_mutex_t sock_lock;      /* Protects sock protocol. */
 255
 256         /* Traffic initiated from the application to the session daemon. */
 257         int notify_sock;
 258         pid_t pid;
 259         pid_t ppid;
 260         uid_t uid;           /* User ID that owns the apps */
 261         gid_t gid;           /* Group ID that owns the apps */
 262
 263         /* App ABI. */
 264         lttng::sessiond::trace::abi abi;
 265
 266         int compatible; /* If the lttng-ust tracer version does not match the
 267                                            supported version of the session daemon, this flag is
 268                                            set to 0 (NOT compatible) else 1. */
 269         struct lttng_ust_abi_tracer_version version;
 270         uint32_t v_major;    /* Version major number */
 271         uint32_t v_minor;    /* Version minor number */
 272         /* Extra for the NULL byte. */
 273         char name[UST_APP_PROCNAME_LEN + 1];
 274         /* Type of buffer this application uses. */
 275         enum lttng_buffer_type buffer_type;
 276         struct lttng_ht *sessions;
 277         struct lttng_ht_node_ulong pid_n;
 278         struct lttng_ht_node_ulong sock_n;
 279         struct lttng_ht_node_ulong notify_sock_n;
 280         /*
 281          * This is a list of ust app session that, once the app is going into
 282          * teardown mode, in the RCU call, each node in this list is removed and
 283          * deleted.
 284          *
 285          * Element of the list are added when an application unregisters after each
 286          * ht_del of ust_app_session associated to this app. This list is NOT used
 287          * when a session is destroyed.
 288          */
 289         struct cds_list_head teardown_head;
 290         /*
 291          * Hash table containing ust_app_channel indexed by channel objd.
 292          */
 293         struct lttng_ht *ust_objd;
 294         /*
 295          * Hash table containing ust_app_session indexed by objd.
 296          */
 297         struct lttng_ht *ust_sessions_objd;
 298
 299         /*
 300          * If this application is of the agent domain and this is non negative then
 301          * a lookup MUST be done to acquire a read side reference to the
 302          * corresponding agent app object. If the lookup fails, this should be set
 303          * to a negative value indicating that the agent application is gone.
 304          */
 305         int agent_app_sock;
 306         /*
 307          * Time at which the app is registred.
 308          * Used for path creation
 309          */
 310         time_t registration_time;
 311         /*
 312          * Event notifier
 313          */
 314         struct {
 315                 /*
 316                  * Handle to the lttng_ust object representing the event
 317                  * notifier group.
 318                  */
 319                 struct lttng_ust_abi_object_data *object;
 320                 struct lttng_pipe *event_pipe;
 321                 struct lttng_ust_abi_object_data *counter;
 322                 struct lttng_ust_abi_object_data **counter_cpu;
 323                 int nr_counter_cpu;
 324         } event_notifier_group;
 325         /*
 326          * Hashtable indexing the application's event notifier rule's
 327          * (ust_app_event_notifier_rule) by their token's value.
 328          */
 329         struct lttng_ht *token_to_event_notifier_rule_ht;
 330
 331         lttng::sessiond::ust::ctl_field_quirks ctl_field_quirks() const;
 332 };
 333
 334 /*
 335  * Due to a bug in g++ < 7.1, this specialization must be enclosed in the fmt namespace,
 336  * see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56480.
 337  */
 338 namespace fmt {
 339 template <>
 340 struct formatter<ust_app> : formatter<std::string> {
 341         template <typename FormatContextType>
 342         typename FormatContextType::iterator format(const ust_app& app, FormatContextType& ctx)
 343         {
 344                 return format_to(ctx.out(),
 345                                 "{{ procname = `{}`, ppid = {}, pid = {}, uid = {}, gid = {}, version = {}.{}, registration time = {} }}",
 346                                 app.name, app.ppid, app.pid, app.uid, app.gid, app.v_major,
 347                                 app.v_minor,
 348                                 lttng::utils::time_to_iso8601_str(app.registration_time));
 349         }
 350 };
 351 } /* namespace fmt */
 352
 353 #ifdef HAVE_LIBLTTNG_UST_CTL
 354
 355 int ust_app_register(struct ust_register_msg *msg, int sock);
 356 int ust_app_register_done(struct ust_app *app);
 357 int ust_app_version(struct ust_app *app);
 358 void ust_app_unregister(int sock);
 359 int ust_app_start_trace_all(struct ltt_ust_session *usess);
 360 int ust_app_stop_trace_all(struct ltt_ust_session *usess);
 361 int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
 362 int ust_app_list_events(struct lttng_event **events);
 363 int ust_app_list_event_fields(struct lttng_event_field **fields);
 364 int ust_app_create_event_glb(struct ltt_ust_session *usess,
 365                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 366 int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
 367                 struct ltt_ust_channel *uchan);
 368 int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
 369                 struct ltt_ust_channel *uchan);
 370 int ust_app_enable_event_glb(struct ltt_ust_session *usess,
 371                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 372 int ust_app_disable_event_glb(struct ltt_ust_session *usess,
 373                 struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
 374 int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
 375                 struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
 376 void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app);
 377 void ust_app_global_update_all(struct ltt_ust_session *usess);
 378 void ust_app_global_update_event_notifier_rules(struct ust_app *app);
 379 void ust_app_global_update_all_event_notifier_rules();
 380
 381 void ust_app_clean_list();
 382 int ust_app_ht_alloc();
 383 struct ust_app *ust_app_find_by_pid(pid_t pid);
 384 struct ust_app_stream *ust_app_alloc_stream();
 385 int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
 386 int ust_app_recv_notify(int sock);
 387 void ust_app_add(struct ust_app *app);
 388 struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock);
 389 void ust_app_notify_sock_unregister(int sock);
 390 ssize_t ust_app_push_metadata(const lttng::sessiond::ust::registry_session::locked_ptr& registry,
 391                 struct consumer_socket *socket,
 392                 int send_zero_data);
 393 void ust_app_destroy(struct ust_app *app);
 394 enum lttng_error_code ust_app_snapshot_record(
 395                 const struct ltt_ust_session *usess,
 396                 const struct consumer_output *output,
 397                 uint64_t nb_packets_per_stream);
 398 uint64_t ust_app_get_size_one_more_packet_per_stream(
 399                 const struct ltt_ust_session *usess, uint64_t cur_nr_packets);
 400 struct ust_app *ust_app_find_by_sock(int sock);
 401 int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
 402                 struct cds_list_head *buffer_reg_uid_list,
 403                 struct consumer_output *consumer, uint64_t uchan_id,
 404                 int overwrite, uint64_t *discarded, uint64_t *lost);
 405 int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
 406                 struct ltt_ust_channel *uchan,
 407                 struct consumer_output *consumer,
 408                 int overwrite, uint64_t *discarded, uint64_t *lost);
 409 int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess);
 410 enum lttng_error_code ust_app_rotate_session(struct ltt_session *session);
 411 enum lttng_error_code ust_app_create_channel_subdirectories(
 412                 const struct ltt_ust_session *session);
 413 int ust_app_release_object(struct ust_app *app,
 414                 struct lttng_ust_abi_object_data *data);
 415 enum lttng_error_code ust_app_clear_session(struct ltt_session *session);
 416 enum lttng_error_code ust_app_open_packets(struct ltt_session *session);
 417
 418 int ust_app_setup_event_notifier_group(struct ust_app *app);
 419
 420 static inline
 421 int ust_app_supported()
 422 {
 423         return 1;
 424 }
 425
 426 bool ust_app_supports_notifiers(const struct ust_app *app);
 427 bool ust_app_supports_counters(const struct ust_app *app);
 428
 429 #else /* HAVE_LIBLTTNG_UST_CTL */
 430
 431 static inline
 432 int ust_app_destroy_trace_all(
 433                 struct ltt_ust_session *usess __attribute__((unused)))
 434 {
 435         return 0;
 436 }
 437
 438 static inline
 439 int ust_app_start_trace(
 440                 struct ltt_ust_session *usess __attribute__((unused)),
 441                 struct ust_app *app __attribute__((unused)))
 442 {
 443         return 0;
 444 }
 445
 446 static inline
 447 int ust_app_start_trace_all(
 448                 struct ltt_ust_session *usess __attribute__((unused)))
 449 {
 450         return 0;
 451 }
 452
 453 static inline
 454 int ust_app_stop_trace_all(
 455                 struct ltt_ust_session *usess __attribute__((unused)))
 456 {
 457         return 0;
 458 }
 459
 460 static inline
 461 int ust_app_list_events(
 462                 struct lttng_event **events __attribute__((unused)))
 463 {
 464         return -ENOSYS;
 465 }
 466
 467 static inline
 468 int ust_app_list_event_fields(
 469                 struct lttng_event_field **fields __attribute__((unused)))
 470 {
 471         return -ENOSYS;
 472 }
 473
 474 static inline
 475 int ust_app_register(
 476                 struct ust_register_msg *msg __attribute__((unused)),
 477                 int sock __attribute__((unused)))
 478 {
 479         return -ENOSYS;
 480 }
 481
 482 static inline
 483 int ust_app_register_done(struct ust_app *app __attribute__((unused)))
 484 {
 485         return -ENOSYS;
 486 }
 487
 488 static inline
 489 int ust_app_version(struct ust_app *app __attribute__((unused)))
 490 {
 491         return -ENOSYS;
 492 }
 493
 494 static inline
 495 void ust_app_unregister(int sock __attribute__((unused)))
 496 {
 497 }
 498
 499 static inline
 500 void ust_app_clean_list(void)
 501 {
 502 }
 503
 504 static inline
 505 struct ust_app_list *ust_app_get_list(void)
 506 {
 507         return NULL;
 508 }
 509
 510 static inline
 511 struct ust_app *ust_app_get_by_pid(pid_t pid __attribute__((unused)))
 512 {
 513         return NULL;
 514 }
 515
 516 static inline
 517 int ust_app_ht_alloc(void)
 518 {
 519         return 0;
 520 }
 521
 522 static inline
 523 void ust_app_global_update(
 524                 struct ltt_ust_session *usess __attribute__((unused)),
 525                 struct ust_app *app __attribute__((unused)))
 526 {}
 527
 528 static inline
 529 void ust_app_global_update_event_notifier_rules(
 530                 struct ust_app *app __attribute__((unused)))
 531 {}
 532
 533 static inline
 534 void ust_app_global_update_all_event_notifier_rules(void)
 535 {}
 536
 537 static inline
 538 int ust_app_setup_event_notifier_group(
 539                 struct ust_app *app __attribute__((unused)))
 540 {
 541         return 0;
 542 }
 543
 544 static inline
 545 int ust_app_disable_channel_glb(
 546                 struct ltt_ust_session *usess __attribute__((unused)),
 547                 struct ltt_ust_channel *uchan __attribute__((unused)))
 548 {
 549         return 0;
 550 }
 551
 552 static inline
 553 int ust_app_enable_channel_glb(
 554                 struct ltt_ust_session *usess __attribute__((unused)),
 555                 struct ltt_ust_channel *uchan __attribute__((unused)))
 556 {
 557         return 0;
 558 }
 559
 560 static inline
 561 int ust_app_create_event_glb(
 562                 struct ltt_ust_session *usess __attribute__((unused)),
 563                 struct ltt_ust_channel *uchan __attribute__((unused)),
 564                 struct ltt_ust_event *uevent __attribute__((unused)))
 565 {
 566         return 0;
 567 }
 568
 569 static inline
 570 int ust_app_disable_event_glb(
 571                 struct ltt_ust_session *usess __attribute__((unused)),
 572                 struct ltt_ust_channel *uchan __attribute__((unused)),
 573                 struct ltt_ust_event *uevent __attribute__((unused)))
 574 {
 575         return 0;
 576 }
 577
 578 static inline
 579 int ust_app_enable_event_glb(
 580                 struct ltt_ust_session *usess __attribute__((unused)),
 581                 struct ltt_ust_channel *uchan __attribute__((unused)),
 582                 struct ltt_ust_event *uevent __attribute__((unused)))
 583 {
 584         return 0;
 585 }
 586
 587 static inline
 588 int ust_app_add_ctx_channel_glb(
 589                 struct ltt_ust_session *usess __attribute__((unused)),
 590                 struct ltt_ust_channel *uchan __attribute__((unused)),
 591                 struct ltt_ust_context *uctx __attribute__((unused)))
 592 {
 593         return 0;
 594 }
 595
 596 static inline
 597 int ust_app_enable_event_pid(
 598                 struct ltt_ust_session *usess __attribute__((unused)),
 599                 struct ltt_ust_channel *uchan __attribute__((unused)),
 600                 struct ltt_ust_event *uevent __attribute__((unused)),
 601                 pid_t pid __attribute__((unused)))
 602 {
 603         return 0;
 604 }
 605
 606 static inline
 607 int ust_app_recv_registration(
 608                 int sock __attribute__((unused)),
 609                 struct ust_register_msg *msg __attribute__((unused)))
 610 {
 611         return 0;
 612 }
 613
 614 static inline
 615 int ust_app_recv_notify(int sock __attribute__((unused)))
 616 {
 617         return 0;
 618 }
 619
 620 static inline
 621 struct ust_app *ust_app_create(
 622                 struct ust_register_msg *msg __attribute__((unused)),
 623                 int sock __attribute__((unused)))
 624 {
 625         return NULL;
 626 }
 627
 628 static inline
 629 void ust_app_add(struct ust_app *app __attribute__((unused)))
 630 {
 631 }
 632
 633 static inline
 634 void ust_app_notify_sock_unregister(int sock __attribute__((unused)))
 635 {
 636 }
 637
 638 static inline
 639 ssize_t ust_app_push_metadata(
 640                 lttng::sessiond::ust::registry_session *registry __attribute__((unused)),
 641                 struct consumer_socket *socket __attribute__((unused)),
 642                 int send_zero_data __attribute__((unused)))
 643 {
 644         return 0;
 645 }
 646
 647 static inline
 648 void ust_app_destroy(struct ust_app *app __attribute__((unused)))
 649 {
 650         return;
 651 }
 652
 653 static inline
 654 enum lttng_error_code ust_app_snapshot_record(
 655                 struct ltt_ust_session *usess __attribute__((unused)),
 656                 const struct consumer_output *output __attribute__((unused)),
 657                 uint64_t max_stream_size __attribute__((unused)))
 658 {
 659         return LTTNG_ERR_UNK;
 660 }
 661
 662 static inline
 663 unsigned int ust_app_get_nb_stream(
 664                 struct ltt_ust_session *usess __attribute__((unused)))
 665 {
 666         return 0;
 667 }
 668
 669 static inline
 670 void ust_app_update_event_notifier_error_count(
 671                 struct lttng_trigger *lttng_trigger __attribute__((unused)))
 672 {
 673         return;
 674 }
 675
 676 static inline
 677 int ust_app_supported(void)
 678 {
 679         return 0;
 680 }
 681
 682 static inline
 683 bool ust_app_supports_notifiers(
 684                 const struct ust_app *app __attribute__((unused)))
 685 {
 686         return false;
 687 }
 688
 689 static inline
 690 bool ust_app_supports_counters(
 691                 const struct ust_app *app __attribute__((unused)))
 692 {
 693         return false;
 694 }
 695
 696 static inline
 697 struct ust_app *ust_app_find_by_sock(int sock __attribute__((unused)))
 698 {
 699         return NULL;
 700 }
 701
 702 static inline
 703 struct ust_app *ust_app_find_by_pid(pid_t pid __attribute__((unused)))
 704 {
 705         return NULL;
 706 }
 707
 708 static inline
 709 uint64_t ust_app_get_size_one_more_packet_per_stream(
 710                 const struct ltt_ust_session *usess __attribute__((unused)),
 711                 uint64_t cur_nr_packets __attribute__((unused))) {
 712         return 0;
 713 }
 714
 715 static inline
 716 int ust_app_uid_get_channel_runtime_stats(
 717                 uint64_t ust_session_id __attribute__((unused)),
 718                 struct cds_list_head *buffer_reg_uid_list __attribute__((unused)),
 719                 struct consumer_output *consumer __attribute__((unused)),
 720                 int overwrite __attribute__((unused)),
 721                 uint64_t uchan_id __attribute__((unused)),
 722                 uint64_t *discarded __attribute__((unused)),
 723                 uint64_t *lost __attribute__((unused)))
 724 {
 725         return 0;
 726 }
 727
 728 static inline
 729 int ust_app_pid_get_channel_runtime_stats(
 730                 struct ltt_ust_session *usess __attribute__((unused)),
 731                 struct ltt_ust_channel *uchan __attribute__((unused)),
 732                 struct consumer_output *consumer __attribute__((unused)),
 733                 int overwrite __attribute__((unused)),
 734                 uint64_t *discarded __attribute__((unused)),
 735                 uint64_t *lost __attribute__((unused)))
 736 {
 737         return 0;
 738 }
 739
 740 static inline
 741 int ust_app_regenerate_statedump_all(
 742                 struct ltt_ust_session *usess __attribute__((unused)))
 743 {
 744         return 0;
 745 }
 746
 747 static inline
 748 enum lttng_error_code ust_app_rotate_session(
 749                 struct ltt_session *session __attribute__((unused)))
 750 {
 751         return LTTNG_ERR_UNK;
 752 }
 753
 754 static inline
 755 enum lttng_error_code ust_app_create_channel_subdirectories(
 756                 const struct ltt_ust_session *session __attribute__((unused)))
 757 {
 758         return LTTNG_ERR_UNK;
 759 }
 760
 761 static inline
 762 int ust_app_release_object(struct ust_app *app __attribute__((unused)),
 763                 struct lttng_ust_abi_object_data *data __attribute__((unused)))
 764 {
 765         return 0;
 766 }
 767
 768 static inline
 769 enum lttng_error_code ust_app_clear_session(
 770                 struct ltt_session *session __attribute__((unused)))
 771 {
 772         return LTTNG_ERR_UNK;
 773 }
 774
 775 static inline
 776 enum lttng_error_code ust_app_open_packets(
 777                 struct ltt_session *session __attribute__((unused)))
 778 {
 779         return LTTNG_ERR_UNK;
 780 }
 781
 782 #endif /* HAVE_LIBLTTNG_UST_CTL */
 783
 784 #endif /* _LTT_UST_APP_H */