liblttng-ust/ust-events-internal.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright 2019 (c) Francis Deslauriers <francis.deslauriers@efficios.com>
   5  */
   6
   7 #ifndef _LTTNG_UST_EVENTS_INTERNAL_H
   8 #define _LTTNG_UST_EVENTS_INTERNAL_H
   9
  10 #include <stdint.h>
  11
  12 #include <urcu/list.h>
  13 #include <urcu/hlist.h>
  14
  15 #include <lttng/ust-events.h>
  16
  17 #include <ust-helper.h>
  18 #include "ust-context-provider.h"
  19
  20 struct lttng_ust_abi_obj;
  21 struct lttng_event_notifier_group;
  22
  23 union lttng_ust_abi_args {
  24         struct {
  25                 void *chan_data;
  26                 int wakeup_fd;
  27         } channel;
  28         struct {
  29                 int shm_fd;
  30                 int wakeup_fd;
  31         } stream;
  32         struct {
  33                 struct lttng_ust_abi_field_iter entry;
  34         } field_list;
  35         struct {
  36                 char *ctxname;
  37         } app_context;
  38         struct {
  39                 int event_notifier_notif_fd;
  40         } event_notifier_handle;
  41         struct {
  42                 void *counter_data;
  43         } counter;
  44         struct {
  45                 int shm_fd;
  46         } counter_shm;
  47 };
  48
  49 struct lttng_ust_abi_objd_ops {
  50         long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
  51                 union lttng_ust_abi_args *args, void *owner);
  52         int (*release)(int objd);
  53 };
  54
  55 enum lttng_enabler_format_type {
  56         LTTNG_ENABLER_FORMAT_STAR_GLOB,
  57         LTTNG_ENABLER_FORMAT_EVENT,
  58 };
  59
  60 /*
  61  * Enabler field, within whatever object is enabling an event. Target of
  62  * backward reference.
  63  */
  64 struct lttng_enabler {
  65         enum lttng_enabler_format_type format_type;
  66
  67         /* head list of struct lttng_ust_filter_bytecode_node */
  68         struct cds_list_head filter_bytecode_head;
  69         /* head list of struct lttng_ust_excluder_node */
  70         struct cds_list_head excluder_head;
  71
  72         struct lttng_ust_abi_event event_param;
  73         unsigned int enabled:1;
  74 };
  75
  76 struct lttng_event_enabler {
  77         struct lttng_enabler base;
  78         struct cds_list_head node;      /* per-session list of enablers */
  79         struct lttng_channel *chan;
  80         /*
  81          * Unused, but kept around to make it explicit that the tracer can do
  82          * it.
  83          */
  84         struct lttng_ust_ctx *ctx;
  85 };
  86
  87 struct lttng_event_notifier_enabler {
  88         struct lttng_enabler base;
  89         uint64_t error_counter_index;
  90         struct cds_list_head node;      /* per-app list of event_notifier enablers */
  91         struct cds_list_head capture_bytecode_head;
  92         struct lttng_event_notifier_group *group; /* weak ref */
  93         uint64_t user_token;            /* User-provided token */
  94         uint64_t num_captures;
  95 };
  96
  97 enum lttng_ust_bytecode_node_type {
  98         LTTNG_UST_BYTECODE_NODE_TYPE_FILTER,
  99         LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE,
 100 };
 101
 102 struct lttng_ust_bytecode_node {
 103         enum lttng_ust_bytecode_node_type type;
 104         struct cds_list_head node;
 105         struct lttng_enabler *enabler;
 106         struct  {
 107                 uint32_t len;
 108                 uint32_t reloc_offset;
 109                 uint64_t seqnum;
 110                 char data[];
 111         } bc;
 112 };
 113
 114 struct lttng_ust_excluder_node {
 115         struct cds_list_head node;
 116         struct lttng_enabler *enabler;
 117         /*
 118          * struct lttng_ust_event_exclusion had variable sized array,
 119          * must be last field.
 120          */
 121         struct lttng_ust_abi_event_exclusion excluder;
 122 };
 123
 124 /* Data structures used by the tracer. */
 125
 126 struct tp_list_entry {
 127         struct lttng_ust_abi_tracepoint_iter tp;
 128         struct cds_list_head head;
 129 };
 130
 131 struct lttng_ust_tracepoint_list {
 132         struct tp_list_entry *iter;
 133         struct cds_list_head head;
 134 };
 135
 136 struct tp_field_list_entry {
 137         struct lttng_ust_abi_field_iter field;
 138         struct cds_list_head head;
 139 };
 140
 141 struct lttng_ust_field_list {
 142         struct tp_field_list_entry *iter;
 143         struct cds_list_head head;
 144 };
 145
 146 /*
 147  * Objects in a linked-list of enablers, owned by an event or event_notifier.
 148  * This is used because an event (or a event_notifier) can be enabled by more
 149  * than one enabler and we want a quick way to iterate over all enablers of an
 150  * object.
 151  *
 152  * For example, event rules "my_app:a*" and "my_app:ab*" will both match the
 153  * event with the name "my_app:abc".
 154  */
 155 struct lttng_enabler_ref {
 156         struct cds_list_head node;              /* enabler ref list */
 157         struct lttng_enabler *ref;              /* backward ref */
 158 };
 159
 160 #define LTTNG_COUNTER_DIMENSION_MAX     8
 161 struct lttng_counter_dimension {
 162         uint64_t size;
 163         uint64_t underflow_index;
 164         uint64_t overflow_index;
 165         uint8_t has_underflow;
 166         uint8_t has_overflow;
 167 };
 168
 169 struct lttng_counter_ops {
 170         struct lib_counter *(*counter_create)(size_t nr_dimensions,
 171                         const struct lttng_counter_dimension *dimensions,
 172                         int64_t global_sum_step,
 173                         int global_counter_fd,
 174                         int nr_counter_cpu_fds,
 175                         const int *counter_cpu_fds,
 176                         bool is_daemon);
 177         void (*counter_destroy)(struct lib_counter *counter);
 178         int (*counter_add)(struct lib_counter *counter,
 179                         const size_t *dimension_indexes, int64_t v);
 180         int (*counter_read)(struct lib_counter *counter,
 181                         const size_t *dimension_indexes, int cpu,
 182                         int64_t *value, bool *overflow, bool *underflow);
 183         int (*counter_aggregate)(struct lib_counter *counter,
 184                         const size_t *dimension_indexes, int64_t *value,
 185                         bool *overflow, bool *underflow);
 186         int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
 187 };
 188
 189 struct lttng_counter {
 190         int objd;
 191         struct lttng_event_notifier_group *event_notifier_group;    /* owner */
 192         struct lttng_counter_transport *transport;
 193         struct lib_counter *counter;
 194         struct lttng_counter_ops *ops;
 195 };
 196
 197 #define LTTNG_UST_EVENT_HT_BITS         12
 198 #define LTTNG_UST_EVENT_HT_SIZE         (1U << LTTNG_UST_EVENT_HT_BITS)
 199
 200 struct lttng_ust_event_ht {
 201         struct cds_hlist_head table[LTTNG_UST_EVENT_HT_SIZE];
 202 };
 203
 204 #define LTTNG_UST_EVENT_NOTIFIER_HT_BITS                12
 205 #define LTTNG_UST_EVENT_NOTIFIER_HT_SIZE                (1U << LTTNG_UST_EVENT_NOTIFIER_HT_BITS)
 206 struct lttng_ust_event_notifier_ht {
 207         struct cds_hlist_head table[LTTNG_UST_EVENT_NOTIFIER_HT_SIZE];
 208 };
 209
 210 #define LTTNG_UST_ENUM_HT_BITS          12
 211 #define LTTNG_UST_ENUM_HT_SIZE          (1U << LTTNG_UST_ENUM_HT_BITS)
 212
 213 struct lttng_ust_enum_ht {
 214         struct cds_hlist_head table[LTTNG_UST_ENUM_HT_SIZE];
 215 };
 216
 217 struct lttng_event_notifier_group {
 218         int objd;
 219         void *owner;
 220         int notification_fd;
 221         struct cds_list_head node;              /* Event notifier group handle list */
 222         struct cds_list_head enablers_head;
 223         struct cds_list_head event_notifiers_head;      /* list of event_notifiers */
 224         struct lttng_ust_event_notifier_ht event_notifiers_ht; /* hashtable of event_notifiers */
 225         struct lttng_ust_ctx *ctx;                      /* contexts for filters. */
 226
 227         struct lttng_counter *error_counter;
 228         size_t error_counter_len;
 229 };
 230
 231 struct lttng_transport {
 232         char *name;
 233         struct cds_list_head node;
 234         struct lttng_ust_channel_ops ops;
 235         const struct lttng_ust_lib_ring_buffer_config *client_config;
 236 };
 237
 238 struct lttng_counter_transport {
 239         char *name;
 240         struct cds_list_head node;
 241         struct lttng_counter_ops ops;
 242         const struct lib_counter_config *client_config;
 243 };
 244
 245 struct lttng_ust_event_common_private {
 246         struct lttng_ust_event_common *pub;     /* Public event interface */
 247
 248         struct lttng_ust_event_desc *desc;
 249         /* Backward references: list of lttng_enabler_ref (ref to enablers) */
 250         struct cds_list_head enablers_ref_head;
 251         int registered;                 /* has reg'd tracepoint probe */
 252         uint64_t user_token;
 253 };
 254
 255 struct lttng_ust_event_recorder_private {
 256         struct lttng_ust_event_common_private parent;
 257
 258         struct lttng_ust_event_recorder *pub;   /* Public event interface */
 259         struct cds_list_head node;              /* Event recorder list */
 260         struct cds_hlist_node hlist;            /* Hash table of event recorders */
 261 };
 262
 263 struct lttng_ust_event_notifier_private {
 264         struct lttng_ust_event_common_private parent;
 265
 266         struct lttng_ust_event_notifier *pub;   /* Public event notifier interface */
 267         struct lttng_event_notifier_group *group; /* weak ref */
 268         size_t num_captures;                    /* Needed to allocate the msgpack array. */
 269         uint64_t error_counter_index;
 270         struct cds_list_head node;              /* Event notifier list */
 271         struct cds_hlist_node hlist;            /* Hash table of event notifiers */
 272 };
 273
 274 struct lttng_ust_bytecode_runtime_private {
 275         struct bytecode_runtime *pub;   /* Public bytecode runtime interface */
 276
 277         struct lttng_ust_bytecode_node *bc;
 278         int link_failed;
 279         /*
 280          * Pointer to a URCU-protected pointer owned by an `struct
 281          * lttng_session`or `struct lttng_event_notifier_group`.
 282          */
 283         struct lttng_ust_ctx **pctx;
 284 };
 285
 286 struct lttng_ust_session_private {
 287         struct lttng_ust_session *pub;          /* Public session interface */
 288
 289         int been_active;                        /* Been active ? */
 290         int objd;                               /* Object associated */
 291         struct cds_list_head chan_head;         /* Channel list head */
 292         struct cds_list_head events_head;       /* list of events */
 293         struct cds_list_head node;              /* Session list */
 294
 295         /* New UST 2.1 */
 296         /* List of enablers */
 297         struct cds_list_head enablers_head;
 298         struct lttng_ust_event_ht events_ht;    /* ht of events */
 299         void *owner;                            /* object owner */
 300         int tstate:1;                           /* Transient enable state */
 301
 302         /* New UST 2.4 */
 303         int statedump_pending:1;
 304
 305         /* New UST 2.8 */
 306         struct lttng_ust_enum_ht enums_ht;      /* ht of enumerations */
 307         struct cds_list_head enums_head;
 308         struct lttng_ust_ctx *ctx;                      /* contexts for filters. */
 309 };
 310
 311 struct lttng_enum {
 312         struct lttng_ust_enum_desc *desc;
 313         struct lttng_ust_session *session;
 314         struct cds_list_head node;      /* Enum list in session */
 315         struct cds_hlist_node hlist;    /* Session ht of enums */
 316         uint64_t id;                    /* Enumeration ID in sessiond */
 317 };
 318
 319 struct lttng_ust_channel_ops_private {
 320         struct lttng_ust_channel_ops *pub;      /* Public channels ops interface */
 321
 322         struct lttng_channel *(*channel_create)(const char *name,
 323                         void *buf_addr,
 324                         size_t subbuf_size, size_t num_subbuf,
 325                         unsigned int switch_timer_interval,
 326                         unsigned int read_timer_interval,
 327                         unsigned char *uuid,
 328                         uint32_t chan_id,
 329                         const int *stream_fds, int nr_stream_fds,
 330                         int64_t blocking_timeout);
 331         void (*channel_destroy)(struct lttng_channel *chan);
 332         /*
 333          * packet_avail_size returns the available size in the current
 334          * packet. Note that the size returned is only a hint, since it
 335          * may change due to concurrent writes.
 336          */
 337         size_t (*packet_avail_size)(struct lttng_ust_lib_ring_buffer_channel *chan,
 338                                     struct lttng_ust_shm_handle *handle);
 339         int (*is_finalized)(struct lttng_ust_lib_ring_buffer_channel *chan);
 340         int (*is_disabled)(struct lttng_ust_lib_ring_buffer_channel *chan);
 341         int (*flush_buffer)(struct lttng_ust_lib_ring_buffer_channel *chan,
 342                             struct lttng_ust_shm_handle *handle);
 343 };
 344
 345 /*
 346  * IMPORTANT: this structure is part of the ABI between the consumer
 347  * daemon and the UST library within traced applications. Changing it
 348  * breaks the UST communication protocol.
 349  *
 350  * TODO: remove unused fields on next UST communication protocol
 351  * breaking update.
 352  */
 353 struct lttng_ust_abi_channel_config {
 354         void *unused1;
 355         int unused2;
 356         void *unused3;
 357         void *unused4;
 358         int unused5;
 359         struct cds_list_head unused6;
 360         void *unused7;
 361         int unused8;
 362         void *unused9;
 363
 364         /* Channel ID */
 365         unsigned int id;
 366         enum lttng_ust_abi_chan_type unused10;
 367         unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
 368         int unused11:1;
 369 };
 370
 371 static inline
 372 struct lttng_ust_type_integer *lttng_ust_get_type_integer(struct lttng_ust_type_common *type)
 373 {
 374         if (type->type != lttng_ust_type_integer)
 375                 return NULL;
 376         return caa_container_of(type, struct lttng_ust_type_integer, parent);
 377 }
 378
 379 static inline
 380 struct lttng_ust_type_float *lttng_ust_get_type_float(struct lttng_ust_type_common *type)
 381 {
 382         if (type->type != lttng_ust_type_float)
 383                 return NULL;
 384         return caa_container_of(type, struct lttng_ust_type_float, parent);
 385 }
 386
 387 static inline
 388 struct lttng_ust_type_string *lttng_ust_get_type_string(struct lttng_ust_type_common *type)
 389 {
 390         if (type->type != lttng_ust_type_string)
 391                 return NULL;
 392         return caa_container_of(type, struct lttng_ust_type_string, parent);
 393 }
 394
 395 static inline
 396 struct lttng_ust_type_enum *lttng_ust_get_type_enum(struct lttng_ust_type_common *type)
 397 {
 398         if (type->type != lttng_ust_type_enum)
 399                 return NULL;
 400         return caa_container_of(type, struct lttng_ust_type_enum, parent);
 401 }
 402
 403 static inline
 404 struct lttng_ust_type_array *lttng_ust_get_type_array(struct lttng_ust_type_common *type)
 405 {
 406         if (type->type != lttng_ust_type_array)
 407                 return NULL;
 408         return caa_container_of(type, struct lttng_ust_type_array, parent);
 409 }
 410
 411 static inline
 412 struct lttng_ust_type_sequence *lttng_ust_get_type_sequence(struct lttng_ust_type_common *type)
 413 {
 414         if (type->type != lttng_ust_type_sequence)
 415                 return NULL;
 416         return caa_container_of(type, struct lttng_ust_type_sequence, parent);
 417 }
 418
 419 static inline
 420 struct lttng_ust_type_struct *lttng_ust_get_type_struct(struct lttng_ust_type_common *type)
 421 {
 422         if (type->type != lttng_ust_type_struct)
 423                 return NULL;
 424         return caa_container_of(type, struct lttng_ust_type_struct, parent);
 425 }
 426
 427 /* Create dynamically allocated types. */
 428 static inline
 429 struct lttng_ust_type_common *lttng_ust_create_type_integer(unsigned int size,
 430                 unsigned short alignment, bool signedness, unsigned int byte_order,
 431                 unsigned int base)
 432 {
 433         struct lttng_ust_type_integer *integer_type;
 434
 435         integer_type = zmalloc(sizeof(struct lttng_ust_type_integer));
 436         if (!integer_type)
 437                 return NULL;
 438         integer_type->parent.type = lttng_ust_type_integer;
 439         integer_type->struct_size = sizeof(struct lttng_ust_type_integer);
 440         integer_type->size = size;
 441         integer_type->alignment = alignment;
 442         integer_type->signedness = signedness;
 443         integer_type->reverse_byte_order = byte_order != BYTE_ORDER;
 444         integer_type->base = base;
 445         return (struct lttng_ust_type_common *) integer_type;
 446 }
 447
 448 static inline
 449 struct lttng_ust_type_common *lttng_ust_create_type_array_text(unsigned int length)
 450 {
 451         struct lttng_ust_type_array *array_type;
 452
 453         array_type = zmalloc(sizeof(struct lttng_ust_type_array));
 454         if (!array_type)
 455                 return NULL;
 456         array_type->parent.type = lttng_ust_type_array;
 457         array_type->struct_size = sizeof(struct lttng_ust_type_array);
 458         array_type->length = length;
 459         array_type->alignment = 0;
 460         array_type->encoding = lttng_ust_string_encoding_UTF8;
 461         array_type->elem_type = lttng_ust_create_type_integer(sizeof(char) * CHAR_BIT,
 462                         lttng_alignof(char) * CHAR_BIT, lttng_is_signed_type(char),
 463                         BYTE_ORDER, 10);
 464         if (!array_type->elem_type)
 465                 goto error_elem;
 466         return (struct lttng_ust_type_common *) array_type;
 467
 468 error_elem:
 469         free(array_type);
 470         return NULL;
 471 }
 472
 473 /*
 474  * Destroy dynamically allocated types, including nested types.
 475  * For enumerations, it does not free the enumeration mapping description.
 476  */
 477 static inline
 478 void lttng_ust_destroy_type(struct lttng_ust_type_common *type)
 479 {
 480         if (!type)
 481                 return;
 482
 483         switch (type->type) {
 484         case lttng_ust_type_integer:
 485         case lttng_ust_type_string:
 486         case lttng_ust_type_float:
 487         case lttng_ust_type_dynamic:
 488                 free(type);
 489                 break;
 490         case lttng_ust_type_enum:
 491         {
 492                 struct lttng_ust_type_enum *enum_type = (struct lttng_ust_type_enum *) type;
 493
 494                 lttng_ust_destroy_type(enum_type->container_type);
 495                 free(enum_type);
 496                 break;
 497         }
 498         case lttng_ust_type_array:
 499         {
 500                 struct lttng_ust_type_array *array_type = (struct lttng_ust_type_array *) type;
 501
 502                 lttng_ust_destroy_type(array_type->elem_type);
 503                 free(array_type);
 504                 break;
 505         }
 506         case lttng_ust_type_sequence:
 507         {
 508                 struct lttng_ust_type_sequence *sequence_type = (struct lttng_ust_type_sequence *) type;
 509
 510                 lttng_ust_destroy_type(sequence_type->elem_type);
 511                 free(sequence_type);
 512                 break;
 513         }
 514         case lttng_ust_type_struct:
 515         {
 516                 struct lttng_ust_type_struct *struct_type = (struct lttng_ust_type_struct *) type;
 517                 unsigned int i;
 518
 519                 for (i = 0; i < struct_type->nr_fields; i++)
 520                         lttng_ust_destroy_type(struct_type->fields[i]->type);
 521                 free(struct_type);
 522                 break;
 523         }
 524         default:
 525                 abort();
 526         }
 527 }
 528
 529 static inline
 530 struct lttng_enabler *lttng_event_enabler_as_enabler(
 531                 struct lttng_event_enabler *event_enabler)
 532 {
 533         return &event_enabler->base;
 534 }
 535
 536 static inline
 537 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 538                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 539 {
 540         return &event_notifier_enabler->base;
 541 }
 542
 543 /*
 544  * Allocate and initialize a `struct lttng_event_enabler` object.
 545  *
 546  * On success, returns a `struct lttng_event_enabler`,
 547  * On memory error, returns NULL.
 548  */
 549 __attribute__((visibility("hidden")))
 550 struct lttng_event_enabler *lttng_event_enabler_create(
 551                 enum lttng_enabler_format_type format_type,
 552                 struct lttng_ust_abi_event *event_param,
 553                 struct lttng_channel *chan);
 554
 555 /*
 556  * Destroy a `struct lttng_event_enabler` object.
 557  */
 558 __attribute__((visibility("hidden")))
 559 void lttng_event_enabler_destroy(struct lttng_event_enabler *enabler);
 560
 561 /*
 562  * Enable a `struct lttng_event_enabler` object and all events related to this
 563  * enabler.
 564  */
 565 __attribute__((visibility("hidden")))
 566 int lttng_event_enabler_enable(struct lttng_event_enabler *enabler);
 567
 568 /*
 569  * Disable a `struct lttng_event_enabler` object and all events related to this
 570  * enabler.
 571  */
 572 __attribute__((visibility("hidden")))
 573 int lttng_event_enabler_disable(struct lttng_event_enabler *enabler);
 574
 575 /*
 576  * Attach filter bytecode program to `struct lttng_event_enabler` and all
 577  * events related to this enabler.
 578  */
 579 __attribute__((visibility("hidden")))
 580 int lttng_event_enabler_attach_filter_bytecode(
 581                 struct lttng_event_enabler *enabler,
 582                 struct lttng_ust_bytecode_node **bytecode);
 583
 584 /*
 585  * Attach an application context to an event enabler.
 586  *
 587  * Not implemented.
 588  */
 589 __attribute__((visibility("hidden")))
 590 int lttng_event_enabler_attach_context(struct lttng_event_enabler *enabler,
 591                 struct lttng_ust_abi_context *ctx);
 592
 593 /*
 594  * Attach exclusion list to `struct lttng_event_enabler` and all
 595  * events related to this enabler.
 596  */
 597 __attribute__((visibility("hidden")))
 598 int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *enabler,
 599                 struct lttng_ust_excluder_node **excluder);
 600
 601 /*
 602  * Synchronize bytecodes for the enabler and the instance (event or
 603  * event_notifier).
 604  *
 605  * This function goes over all bytecode programs of the enabler (event or
 606  * event_notifier enabler) to ensure each is linked to the provided instance.
 607  */
 608 __attribute__((visibility("hidden")))
 609 void lttng_enabler_link_bytecode(struct lttng_ust_event_desc *event_desc,
 610                 struct lttng_ust_ctx **ctx,
 611                 struct cds_list_head *instance_bytecode_runtime_head,
 612                 struct cds_list_head *enabler_bytecode_runtime_head);
 613
 614 /*
 615  * Allocate and initialize a `struct lttng_event_notifier_group` object.
 616  *
 617  * On success, returns a `struct lttng_triggre_group`,
 618  * on memory error, returns NULL.
 619  */
 620 __attribute__((visibility("hidden")))
 621 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
 622
 623 /*
 624  * Destroy a `struct lttng_event_notifier_group` object.
 625  */
 626 __attribute__((visibility("hidden")))
 627 void lttng_event_notifier_group_destroy(
 628                 struct lttng_event_notifier_group *event_notifier_group);
 629
 630 /*
 631  * Allocate and initialize a `struct lttng_event_notifier_enabler` object.
 632  *
 633  * On success, returns a `struct lttng_event_notifier_enabler`,
 634  * On memory error, returns NULL.
 635  */
 636 __attribute__((visibility("hidden")))
 637 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 638                 struct lttng_event_notifier_group *event_notifier_group,
 639                 enum lttng_enabler_format_type format_type,
 640                 struct lttng_ust_abi_event_notifier *event_notifier_param);
 641
 642 /*
 643  * Destroy a `struct lttng_event_notifier_enabler` object.
 644  */
 645 __attribute__((visibility("hidden")))
 646 void lttng_event_notifier_enabler_destroy(
 647                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 648
 649 /*
 650  * Enable a `struct lttng_event_notifier_enabler` object and all event
 651  * notifiers related to this enabler.
 652  */
 653 __attribute__((visibility("hidden")))
 654 int lttng_event_notifier_enabler_enable(
 655                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 656
 657 /*
 658  * Disable a `struct lttng_event_notifier_enabler` object and all event
 659  * notifiers related to this enabler.
 660  */
 661 __attribute__((visibility("hidden")))
 662 int lttng_event_notifier_enabler_disable(
 663                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 664
 665 /*
 666  * Attach filter bytecode program to `struct lttng_event_notifier_enabler` and
 667  * all event notifiers related to this enabler.
 668  */
 669 __attribute__((visibility("hidden")))
 670 int lttng_event_notifier_enabler_attach_filter_bytecode(
 671                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 672                 struct lttng_ust_bytecode_node **bytecode);
 673
 674 /*
 675  * Attach capture bytecode program to `struct lttng_event_notifier_enabler` and
 676  * all event_notifiers related to this enabler.
 677  */
 678 __attribute__((visibility("hidden")))
 679 int lttng_event_notifier_enabler_attach_capture_bytecode(
 680                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 681                 struct lttng_ust_bytecode_node **bytecode);
 682
 683 /*
 684  * Attach exclusion list to `struct lttng_event_notifier_enabler` and all
 685  * event notifiers related to this enabler.
 686  */
 687 __attribute__((visibility("hidden")))
 688 int lttng_event_notifier_enabler_attach_exclusion(
 689                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 690                 struct lttng_ust_excluder_node **excluder);
 691
 692 __attribute__((visibility("hidden")))
 693 void lttng_free_event_filter_runtime(struct lttng_ust_event_common *event);
 694
 695 /*
 696  * Connect the probe on all enablers matching this event description.
 697  * Called on library load.
 698  */
 699 __attribute__((visibility("hidden")))
 700 int lttng_fix_pending_event_notifiers(void);
 701
 702 __attribute__((visibility("hidden")))
 703 struct lttng_counter *lttng_ust_counter_create(
 704                 const char *counter_transport_name,
 705                 size_t number_dimensions, const struct lttng_counter_dimension *dimensions);
 706
 707 #ifdef HAVE_PERF_EVENT
 708
 709 __attribute__((visibility("hidden")))
 710 int lttng_add_perf_counter_to_ctx(uint32_t type,
 711                                   uint64_t config,
 712                                   const char *name,
 713                                   struct lttng_ust_ctx **ctx);
 714
 715 __attribute__((visibility("hidden")))
 716 int lttng_perf_counter_init(void);
 717
 718 __attribute__((visibility("hidden")))
 719 void lttng_perf_counter_exit(void);
 720
 721 #else /* #ifdef HAVE_PERF_EVENT */
 722
 723 static inline
 724 int lttng_add_perf_counter_to_ctx(uint32_t type,
 725                                   uint64_t config,
 726                                   const char *name,
 727                                   struct lttng_ust_ctx **ctx)
 728 {
 729         return -ENOSYS;
 730 }
 731 static inline
 732 int lttng_perf_counter_init(void)
 733 {
 734         return 0;
 735 }
 736 static inline
 737 void lttng_perf_counter_exit(void)
 738 {
 739 }
 740 #endif /* #else #ifdef HAVE_PERF_EVENT */
 741
 742 __attribute__((visibility("hidden")))
 743 int lttng_probes_get_event_list(struct lttng_ust_tracepoint_list *list);
 744
 745 __attribute__((visibility("hidden")))
 746 void lttng_probes_prune_event_list(struct lttng_ust_tracepoint_list *list);
 747
 748 __attribute__((visibility("hidden")))
 749 int lttng_probes_get_field_list(struct lttng_ust_field_list *list);
 750
 751 __attribute__((visibility("hidden")))
 752 void lttng_probes_prune_field_list(struct lttng_ust_field_list *list);
 753
 754 __attribute__((visibility("hidden")))
 755 struct lttng_ust_abi_tracepoint_iter *
 756         lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list);
 757
 758 __attribute__((visibility("hidden")))
 759 struct lttng_ust_abi_field_iter *
 760         lttng_ust_field_list_get_iter_next(struct lttng_ust_field_list *list);
 761
 762 __attribute__((visibility("hidden")))
 763 struct lttng_ust_session *lttng_session_create(void);
 764
 765 __attribute__((visibility("hidden")))
 766 int lttng_session_enable(struct lttng_ust_session *session);
 767
 768 __attribute__((visibility("hidden")))
 769 int lttng_session_disable(struct lttng_ust_session *session);
 770
 771 __attribute__((visibility("hidden")))
 772 int lttng_session_statedump(struct lttng_ust_session *session);
 773
 774 __attribute__((visibility("hidden")))
 775 void lttng_session_destroy(struct lttng_ust_session *session);
 776
 777 /*
 778  * Called with ust lock held.
 779  */
 780 __attribute__((visibility("hidden")))
 781 int lttng_session_active(void);
 782
 783 __attribute__((visibility("hidden")))
 784 struct cds_list_head *lttng_get_sessions(void);
 785
 786 __attribute__((visibility("hidden")))
 787 void lttng_handle_pending_statedump(void *owner);
 788
 789 __attribute__((visibility("hidden")))
 790 struct lttng_channel *lttng_channel_create(struct lttng_ust_session *session,
 791                                        const char *transport_name,
 792                                        void *buf_addr,
 793                                        size_t subbuf_size, size_t num_subbuf,
 794                                        unsigned int switch_timer_interval,
 795                                        unsigned int read_timer_interval,
 796                                        int **shm_fd, int **wait_fd,
 797                                        uint64_t **memory_map_size,
 798                                        struct lttng_channel *chan_priv_init);
 799
 800 __attribute__((visibility("hidden")))
 801 int lttng_channel_enable(struct lttng_channel *channel);
 802
 803 __attribute__((visibility("hidden")))
 804 int lttng_channel_disable(struct lttng_channel *channel);
 805
 806 __attribute__((visibility("hidden")))
 807 void lttng_transport_register(struct lttng_transport *transport);
 808
 809 __attribute__((visibility("hidden")))
 810 void lttng_transport_unregister(struct lttng_transport *transport);
 811
 812 /* This is ABI between liblttng-ust and liblttng-ust-ctl */
 813 struct lttng_transport *lttng_ust_transport_find(const char *name);
 814
 815 /* This is ABI between liblttng-ust and liblttng-ust-dl */
 816 void lttng_ust_dl_update(void *ip);
 817
 818 __attribute__((visibility("hidden")))
 819 void lttng_probe_provider_unregister_events(struct lttng_ust_probe_desc *desc);
 820
 821 __attribute__((visibility("hidden")))
 822 int lttng_fix_pending_events(void);
 823
 824 __attribute__((visibility("hidden")))
 825 struct cds_list_head *lttng_get_probe_list_head(void);
 826
 827 __attribute__((visibility("hidden")))
 828 struct lttng_enum *lttng_ust_enum_get_from_desc(struct lttng_ust_session *session,
 829                 struct lttng_ust_enum_desc *enum_desc);
 830
 831 __attribute__((visibility("hidden")))
 832 int lttng_abi_create_root_handle(void);
 833
 834 __attribute__((visibility("hidden")))
 835 const struct lttng_ust_abi_objd_ops *lttng_ust_abi_objd_ops(int id);
 836
 837 __attribute__((visibility("hidden")))
 838 int lttng_ust_abi_objd_unref(int id, int is_owner);
 839
 840 __attribute__((visibility("hidden")))
 841 void lttng_ust_abi_exit(void);
 842
 843 __attribute__((visibility("hidden")))
 844 void lttng_ust_abi_events_exit(void);
 845
 846 __attribute__((visibility("hidden")))
 847 void lttng_ust_abi_objd_table_owner_cleanup(void *owner);
 848
 849 #endif /* _LTTNG_UST_EVENTS_INTERNAL_H */