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 */