include/lttng/events-internal.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng/events-internal.h
   4  *
   5  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   6  */
   7
   8 #ifndef _LTTNG_EVENTS_INTERNAL_H
   9 #define _LTTNG_EVENTS_INTERNAL_H
  10
  11 #include <lttng/events.h>
  12
  13 struct lttng_syscall_filter;
  14 struct lttng_metadata_cache;
  15 struct perf_event;
  16 struct perf_event_attr;
  17 struct lib_ring_buffer_config;
  18
  19 enum lttng_enabler_format_type {
  20         LTTNG_ENABLER_FORMAT_STAR_GLOB,
  21         LTTNG_ENABLER_FORMAT_NAME,
  22 };
  23
  24 /*
  25  * Objects in a linked-list of enablers, owned by an event.
  26  */
  27 struct lttng_enabler_ref {
  28         struct list_head node;                  /* enabler ref list */
  29         struct lttng_enabler *ref;              /* backward ref */
  30 };
  31
  32 struct lttng_krp;                               /* Kretprobe handling */
  33
  34 struct lttng_uprobe_handler {
  35         struct lttng_kernel_event_common *event;
  36         loff_t offset;
  37         struct uprobe_consumer up_consumer;
  38         struct list_head node;
  39 };
  40
  41 struct lttng_kprobe {
  42         struct kprobe kp;
  43         char *symbol_name;
  44 };
  45
  46 struct lttng_uprobe {
  47         struct inode *inode;
  48         struct list_head head;
  49 };
  50
  51 enum lttng_syscall_entryexit {
  52         LTTNG_SYSCALL_ENTRY,
  53         LTTNG_SYSCALL_EXIT,
  54 };
  55
  56 enum lttng_syscall_abi {
  57         LTTNG_SYSCALL_ABI_NATIVE,
  58         LTTNG_SYSCALL_ABI_COMPAT,
  59 };
  60
  61 struct lttng_kernel_event_common_private {
  62         struct lttng_kernel_event_common *pub;          /* Public event interface */
  63
  64         const struct lttng_kernel_event_desc *desc;
  65         /* Backward references: list of lttng_enabler_ref (ref to enablers) */
  66         struct list_head enablers_ref_head;
  67         int registered;                                 /* has reg'd tracepoint probe */
  68         uint64_t user_token;
  69
  70         int has_enablers_without_filter_bytecode;
  71         /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */
  72         struct list_head filter_bytecode_runtime_head;
  73         enum lttng_kernel_abi_instrumentation instrumentation;
  74         /* Selected by instrumentation */
  75         union {
  76                 struct lttng_kprobe kprobe;
  77                 struct lttng_uprobe uprobe;
  78                 struct {
  79                         struct lttng_krp *lttng_krp;
  80                         char *symbol_name;
  81                 } kretprobe;
  82                 struct {
  83                         enum lttng_syscall_entryexit entryexit;
  84                         enum lttng_syscall_abi abi;
  85                         struct hlist_node node;                 /* chain registered syscall event_notifier */
  86                         unsigned int syscall_id;
  87                 } syscall;
  88         } u;
  89 };
  90
  91 struct lttng_kernel_event_recorder_private {
  92         struct lttng_kernel_event_common_private parent;
  93
  94         struct lttng_kernel_event_recorder *pub;        /* Public event interface */
  95         struct list_head node;                          /* Event recorder list */
  96         struct hlist_node hlist;                        /* Hash table of event recorders */
  97         struct lttng_kernel_ctx *ctx;
  98         unsigned int id;
  99         unsigned int metadata_dumped:1;
 100 };
 101
 102 struct lttng_kernel_event_notifier_private {
 103         struct lttng_kernel_event_common_private parent;
 104
 105         struct lttng_kernel_event_notifier *pub;        /* Public event notifier interface */
 106         struct lttng_event_notifier_group *group;       /* weak ref */
 107         size_t num_captures;                            /* Needed to allocate the msgpack array. */
 108         uint64_t error_counter_index;
 109         struct list_head node;                          /* Event notifier list */
 110         struct hlist_node hlist;                        /* Hash table of event notifiers */
 111         struct list_head capture_bytecode_runtime_head;
 112
 113 };
 114
 115 enum lttng_kernel_bytecode_interpreter_ret {
 116         LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1,
 117         LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0,
 118 };
 119
 120 enum lttng_kernel_bytecode_filter_result {
 121         LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0,
 122         LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1,
 123 };
 124
 125 struct lttng_kernel_bytecode_filter_ctx {
 126         enum lttng_kernel_bytecode_filter_result result;
 127 };
 128
 129 struct lttng_interpreter_output;
 130
 131 enum lttng_kernel_bytecode_type {
 132         LTTNG_KERNEL_BYTECODE_TYPE_FILTER,
 133         LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE,
 134 };
 135
 136 struct lttng_kernel_bytecode_node {
 137         enum lttng_kernel_bytecode_type type;
 138         struct list_head node;
 139         struct lttng_enabler *enabler;
 140         struct {
 141                 uint32_t len;
 142                 uint32_t reloc_offset;
 143                 uint64_t seqnum;
 144                 char data[];
 145         } bc;
 146 };
 147
 148 struct lttng_kernel_bytecode_runtime {
 149         /* Associated bytecode */
 150         enum lttng_kernel_bytecode_type type;
 151         struct lttng_kernel_bytecode_node *bc;
 152         int (*interpreter_func)(struct lttng_kernel_bytecode_runtime *kernel_bytecode,
 153                                 const char *interpreter_stack_data,
 154                                 struct lttng_kernel_probe_ctx *lttng_probe_ctx,
 155                                 void *caller_ctx);
 156         int link_failed;
 157         struct list_head node;  /* list of bytecode runtime in event */
 158         struct lttng_kernel_ctx *ctx;
 159 };
 160
 161 /*
 162  * Enabler field, within whatever object is enabling an event. Target of
 163  * backward reference.
 164  */
 165 struct lttng_enabler {
 166         enum lttng_enabler_format_type format_type;
 167
 168         /* head list of struct lttng_kernel_bytecode_node */
 169         struct list_head filter_bytecode_head;
 170
 171         struct lttng_kernel_abi_event event_param;
 172         unsigned int enabled:1;
 173
 174         uint64_t user_token;            /* User-provided token. */
 175 };
 176
 177 struct lttng_event_enabler {
 178         struct lttng_enabler base;
 179         struct list_head node;  /* per-session list of enablers */
 180         struct lttng_channel *chan;
 181 };
 182
 183 struct lttng_event_notifier_enabler {
 184         struct lttng_enabler base;
 185         uint64_t error_counter_index;
 186         struct list_head node;  /* List of event_notifier enablers */
 187         struct lttng_event_notifier_group *group;
 188
 189         /* head list of struct lttng_kernel_bytecode_node */
 190         struct list_head capture_bytecode_head;
 191         uint64_t num_captures;
 192 };
 193
 194 struct lttng_ctx_value {
 195         union {
 196                 int64_t s64;
 197                 const char *str;
 198                 double d;
 199         } u;
 200 };
 201
 202 /*
 203  * We need to keep this perf counter field separately from struct
 204  * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses.
 205  */
 206 struct lttng_perf_counter_field {
 207 #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0))
 208         struct lttng_cpuhp_node cpuhp_prepare;
 209         struct lttng_cpuhp_node cpuhp_online;
 210 #else
 211         struct notifier_block nb;
 212         int hp_enable;
 213 #endif
 214         struct perf_event_attr *attr;
 215         struct perf_event **e;  /* per-cpu array */
 216         char *name;
 217         struct lttng_kernel_event_field *event_field;
 218 };
 219
 220 struct lttng_kernel_ctx_field {
 221         const struct lttng_kernel_event_field *event_field;
 222         size_t (*get_size)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
 223                         size_t offset);
 224         void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
 225                         struct lttng_kernel_ring_buffer_ctx *ctx,
 226                         struct lttng_channel *chan);
 227         void (*get_value)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx,
 228                         struct lttng_ctx_value *value);
 229         void (*destroy)(void *priv);
 230         void *priv;
 231 };
 232
 233 struct lttng_kernel_ctx {
 234         struct lttng_kernel_ctx_field *fields;
 235         unsigned int nr_fields;
 236         unsigned int allocated_fields;
 237         size_t largest_align;   /* in bytes */
 238 };
 239
 240 struct lttng_metadata_cache {
 241         char *data;                     /* Metadata cache */
 242         unsigned int cache_alloc;       /* Metadata allocated size (bytes) */
 243         unsigned int metadata_written;  /* Number of bytes written in metadata cache */
 244         atomic_t producing;             /* Metadata being produced (incomplete) */
 245         struct kref refcount;           /* Metadata cache usage */
 246         struct list_head metadata_stream;       /* Metadata stream list */
 247         uuid_le uuid;                   /* Trace session unique ID (copy) */
 248         struct mutex lock;              /* Produce/consume lock */
 249         uint64_t version;               /* Current version of the metadata */
 250 };
 251
 252 struct lttng_metadata_stream {
 253         void *priv;                     /* Ring buffer private data */
 254         struct lttng_metadata_cache *metadata_cache;
 255         unsigned int metadata_in;       /* Bytes read from the cache */
 256         unsigned int metadata_out;      /* Bytes consumed from stream */
 257         int finalized;                  /* Has channel been finalized */
 258         wait_queue_head_t read_wait;    /* Reader buffer-level wait queue */
 259         struct list_head list;          /* Stream list */
 260         struct lttng_transport *transport;
 261         uint64_t version;               /* Current version of the metadata cache */
 262         bool coherent;                  /* Stream in a coherent state */
 263 };
 264
 265 struct lttng_kernel_channel_buffer_ops_private {
 266         struct lttng_kernel_channel_buffer_ops *pub;    /* Public channel buffer ops interface */
 267
 268         struct channel *(*channel_create)(const char *name,
 269                                 void *priv,
 270                                 void *buf_addr,
 271                                 size_t subbuf_size, size_t num_subbuf,
 272                                 unsigned int switch_timer_interval,
 273                                 unsigned int read_timer_interval);
 274         void (*channel_destroy)(struct channel *chan);
 275         struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
 276         int (*buffer_has_read_closed_stream)(struct channel *chan);
 277         void (*buffer_read_close)(struct lib_ring_buffer *buf);
 278         /*
 279          * packet_avail_size returns the available size in the current
 280          * packet. Note that the size returned is only a hint, since it
 281          * may change due to concurrent writes.
 282          */
 283         size_t (*packet_avail_size)(struct channel *chan);
 284         wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu);
 285         wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan);
 286         int (*is_finalized)(struct channel *chan);
 287         int (*is_disabled)(struct channel *chan);
 288         int (*timestamp_begin) (const struct lib_ring_buffer_config *config,
 289                         struct lib_ring_buffer *bufb,
 290                         uint64_t *timestamp_begin);
 291         int (*timestamp_end) (const struct lib_ring_buffer_config *config,
 292                         struct lib_ring_buffer *bufb,
 293                         uint64_t *timestamp_end);
 294         int (*events_discarded) (const struct lib_ring_buffer_config *config,
 295                         struct lib_ring_buffer *bufb,
 296                         uint64_t *events_discarded);
 297         int (*content_size) (const struct lib_ring_buffer_config *config,
 298                         struct lib_ring_buffer *bufb,
 299                         uint64_t *content_size);
 300         int (*packet_size) (const struct lib_ring_buffer_config *config,
 301                         struct lib_ring_buffer *bufb,
 302                         uint64_t *packet_size);
 303         int (*stream_id) (const struct lib_ring_buffer_config *config,
 304                         struct lib_ring_buffer *bufb,
 305                         uint64_t *stream_id);
 306         int (*current_timestamp) (const struct lib_ring_buffer_config *config,
 307                         struct lib_ring_buffer *bufb,
 308                         uint64_t *ts);
 309         int (*sequence_number) (const struct lib_ring_buffer_config *config,
 310                         struct lib_ring_buffer *bufb,
 311                         uint64_t *seq);
 312         int (*instance_id) (const struct lib_ring_buffer_config *config,
 313                         struct lib_ring_buffer *bufb,
 314                         uint64_t *id);
 315 };
 316
 317 struct lttng_counter_ops {
 318         struct lib_counter *(*counter_create)(size_t nr_dimensions,
 319                         const size_t *max_nr_elem,      /* for each dimension */
 320                         int64_t global_sum_step);
 321         void (*counter_destroy)(struct lib_counter *counter);
 322         int (*counter_add)(struct lib_counter *counter, const size_t *dimension_indexes,
 323                         int64_t v);
 324         /*
 325          * counter_read reads a specific cpu's counter if @cpu >= 0, or
 326          * the global aggregation counter if @cpu == -1.
 327          */
 328         int (*counter_read)(struct lib_counter *counter, const size_t *dimension_indexes, int cpu,
 329                          int64_t *value, bool *overflow, bool *underflow);
 330         /*
 331          * counter_aggregate returns the total sum of all per-cpu counters and
 332          * the global aggregation counter.
 333          */
 334         int (*counter_aggregate)(struct lib_counter *counter, const size_t *dimension_indexes,
 335                         int64_t *value, bool *overflow, bool *underflow);
 336         int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
 337 };
 338
 339 struct lttng_counter {
 340         struct file *file;              /* File associated to counter. */
 341         struct file *owner;
 342         struct lttng_counter_transport *transport;
 343         struct lib_counter *counter;
 344         struct lttng_counter_ops *ops;
 345 };
 346
 347 #define LTTNG_EVENT_NOTIFIER_HT_BITS            12
 348 #define LTTNG_EVENT_NOTIFIER_HT_SIZE            (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
 349
 350 struct lttng_event_notifier_ht {
 351         struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE];
 352 };
 353
 354 struct lttng_event_notifier_group {
 355         struct file *file;              /* File associated to event notifier group */
 356         struct file *notif_file;        /* File used to expose notifications to userspace. */
 357         struct list_head node;          /* event notifier group list */
 358         struct list_head enablers_head; /* List of enablers */
 359         struct list_head event_notifiers_head; /* List of event notifier */
 360         struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */
 361         struct lttng_kernel_channel_buffer_ops *ops;
 362         struct lttng_transport *transport;
 363         struct channel *chan;           /* Ring buffer channel for event notifier group. */
 364         struct lib_ring_buffer *buf;    /* Ring buffer for event notifier group. */
 365         wait_queue_head_t read_wait;
 366         struct irq_work wakeup_pending; /* Pending wakeup irq work. */
 367         struct lttng_kernel_event_notifier *sc_unknown; /* for unknown syscalls */
 368         struct lttng_kernel_event_notifier *sc_compat_unknown;
 369
 370         struct lttng_syscall_filter *sc_filter;
 371
 372         struct hlist_head *event_notifier_syscall_dispatch;
 373         struct hlist_head *event_notifier_compat_syscall_dispatch;
 374         struct hlist_head *event_notifier_exit_syscall_dispatch;
 375         struct hlist_head *event_notifier_exit_compat_syscall_dispatch;
 376
 377         struct hlist_head event_notifier_unknown_syscall_dispatch;
 378         struct hlist_head event_notifier_compat_unknown_syscall_dispatch;
 379         struct hlist_head event_notifier_exit_unknown_syscall_dispatch;
 380         struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch;
 381
 382         int syscall_all_entry;
 383         int syscall_all_exit;
 384
 385         unsigned int sys_enter_registered:1, sys_exit_registered:1;
 386
 387         struct lttng_counter *error_counter;
 388         size_t error_counter_len;
 389 };
 390
 391 struct lttng_transport {
 392         char *name;
 393         struct module *owner;
 394         struct list_head node;
 395         struct lttng_kernel_channel_buffer_ops ops;
 396 };
 397
 398 struct lttng_counter_transport {
 399         char *name;
 400         struct module *owner;
 401         struct list_head node;
 402         struct lttng_counter_ops ops;
 403 };
 404
 405 #define LTTNG_EVENT_HT_BITS             12
 406 #define LTTNG_EVENT_HT_SIZE             (1U << LTTNG_EVENT_HT_BITS)
 407
 408 struct lttng_event_ht {
 409         struct hlist_head table[LTTNG_EVENT_HT_SIZE];
 410 };
 411
 412 struct lttng_kernel_session_private {
 413         struct lttng_kernel_session *pub;       /* Public session interface */
 414
 415         int been_active;                        /* Has trace session been active ? */
 416         struct file *file;                      /* File associated to session */
 417         struct list_head chan;                  /* Channel list head */
 418         struct list_head events;                /* Event list head */
 419         struct list_head list;                  /* Session list */
 420         unsigned int free_chan_id;              /* Next chan ID to allocate */
 421         uuid_le uuid;                           /* Trace session unique ID */
 422         struct lttng_metadata_cache *metadata_cache;
 423         unsigned int metadata_dumped:1,
 424                 tstate:1;                       /* Transient enable state */
 425         /* List of event enablers */
 426         struct list_head enablers_head;
 427         /* Hash table of events */
 428         struct lttng_event_ht events_ht;
 429         char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
 430         char creation_time[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
 431 };
 432
 433 struct lttng_id_hash_node {
 434         struct hlist_node hlist;
 435         int id;
 436 };
 437
 438 enum tracker_type {
 439         TRACKER_PID,
 440         TRACKER_VPID,
 441         TRACKER_UID,
 442         TRACKER_VUID,
 443         TRACKER_GID,
 444         TRACKER_VGID,
 445
 446         TRACKER_UNKNOWN,
 447 };
 448
 449 struct lttng_kernel_id_tracker_private {
 450         struct lttng_kernel_id_tracker *pub;    /* Public interface */
 451
 452         struct lttng_kernel_session *session;
 453         enum tracker_type tracker_type;
 454 };
 455
 456 extern struct lttng_kernel_ctx *lttng_static_ctx;
 457
 458 static inline
 459 const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type)
 460 {
 461         if (type->type != lttng_kernel_type_integer)
 462                 return NULL;
 463         return container_of(type, const struct lttng_kernel_type_integer, parent);
 464 }
 465
 466 static inline
 467 const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type)
 468 {
 469         if (type->type != lttng_kernel_type_string)
 470                 return NULL;
 471         return container_of(type, const struct lttng_kernel_type_string, parent);
 472 }
 473
 474 static inline
 475 const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type)
 476 {
 477         if (type->type != lttng_kernel_type_enum)
 478                 return NULL;
 479         return container_of(type, const struct lttng_kernel_type_enum, parent);
 480 }
 481
 482 static inline
 483 const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type)
 484 {
 485         if (type->type != lttng_kernel_type_array)
 486                 return NULL;
 487         return container_of(type, const struct lttng_kernel_type_array, parent);
 488 }
 489
 490 static inline
 491 const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type)
 492 {
 493         if (type->type != lttng_kernel_type_sequence)
 494                 return NULL;
 495         return container_of(type, const struct lttng_kernel_type_sequence, parent);
 496 }
 497
 498 static inline
 499 const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type)
 500 {
 501         if (type->type != lttng_kernel_type_struct)
 502                 return NULL;
 503         return container_of(type, const struct lttng_kernel_type_struct, parent);
 504 }
 505
 506 static inline
 507 const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type)
 508 {
 509         if (type->type != lttng_kernel_type_variant)
 510                 return NULL;
 511         return container_of(type, const struct lttng_kernel_type_variant, parent);
 512 }
 513
 514 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type)
 515 {
 516         const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type);
 517
 518         if (!type_integer)
 519                 return false;
 520         switch (type_integer->size) {
 521         case 8:         /* Fall-through. */
 522         case 16:        /* Fall-through. */
 523         case 32:        /* Fall-through. */
 524         case 64:
 525                 break;
 526         default:
 527                 return false;
 528         }
 529         return true;
 530 }
 531
 532 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
 533                 const char *interpreter_stack_data,
 534                 struct lttng_kernel_probe_ctx *probe_ctx,
 535                 void *event_filter_ctx);
 536
 537 static inline
 538 struct lttng_enabler *lttng_event_enabler_as_enabler(
 539                 struct lttng_event_enabler *event_enabler)
 540 {
 541         return &event_enabler->base;
 542 }
 543
 544 static inline
 545 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 546                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 547 {
 548         return &event_notifier_enabler->base;
 549 }
 550
 551 int lttng_context_init(void);
 552 void lttng_context_exit(void);
 553 int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
 554                 const struct lttng_kernel_ctx_field *f);
 555 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
 556 struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx,
 557                 size_t index);
 558 int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name);
 559 int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name);
 560 void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
 561 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
 562 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
 563 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
 564 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
 565 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
 566 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
 567 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
 568 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
 569 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
 570 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
 571 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
 572 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
 573 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
 574 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
 575 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
 576 #else
 577 static inline
 578 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
 579 {
 580         return -ENOSYS;
 581 }
 582 #endif
 583 #ifdef CONFIG_PREEMPT_RT_FULL
 584 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
 585 #else
 586 static inline
 587 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
 588 {
 589         return -ENOSYS;
 590 }
 591 #endif
 592
 593 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);
 594
 595 #if defined(CONFIG_CGROUPS) && \
 596         ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
 597          LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
 598 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 599 #else
 600 static inline
 601 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 602 {
 603         return -ENOSYS;
 604 }
 605 #endif
 606
 607 #if defined(CONFIG_IPC_NS) && \
 608         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 609 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 610 #else
 611 static inline
 612 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 613 {
 614         return -ENOSYS;
 615 }
 616 #endif
 617
 618 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
 619         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 620 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 621 #else
 622 static inline
 623 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 624 {
 625         return -ENOSYS;
 626 }
 627 #endif
 628
 629 #if defined(CONFIG_NET_NS) && \
 630         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 631 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 632 #else
 633 static inline
 634 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 635 {
 636         return -ENOSYS;
 637 }
 638 #endif
 639
 640 #if defined(CONFIG_PID_NS) && \
 641         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 642 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 643 #else
 644 static inline
 645 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 646 {
 647         return -ENOSYS;
 648 }
 649 #endif
 650
 651 #if defined(CONFIG_USER_NS) && \
 652         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 653 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 654 #else
 655 static inline
 656 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 657 {
 658         return -ENOSYS;
 659 }
 660 #endif
 661
 662 #if defined(CONFIG_UTS_NS) && \
 663         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 664 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 665 #else
 666 static inline
 667 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 668 {
 669         return -ENOSYS;
 670 }
 671 #endif
 672
 673 #if defined(CONFIG_TIME_NS) && \
 674         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
 675 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 676 #else
 677 static inline
 678 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 679 {
 680         return -ENOSYS;
 681 }
 682 #endif
 683
 684 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
 685 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
 686 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
 687 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
 688 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
 689 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
 690 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
 691 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
 692 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
 693 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
 694 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
 695 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);
 696
 697 #if defined(CONFIG_PERF_EVENTS)
 698 int lttng_add_perf_counter_to_ctx(uint32_t type,
 699                                   uint64_t config,
 700                                   const char *name,
 701                                   struct lttng_kernel_ctx **ctx);
 702 int lttng_cpuhp_perf_counter_online(unsigned int cpu,
 703                 struct lttng_cpuhp_node *node);
 704 int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
 705                 struct lttng_cpuhp_node *node);
 706 #else
 707 static inline
 708 int lttng_add_perf_counter_to_ctx(uint32_t type,
 709                                   uint64_t config,
 710                                   const char *name,
 711                                   struct lttng_kernel_ctx **ctx)
 712 {
 713         return -ENOSYS;
 714 }
 715 static inline
 716 int lttng_cpuhp_perf_counter_online(unsigned int cpu,
 717                 struct lttng_cpuhp_node *node)
 718 {
 719         return 0;
 720 }
 721 static inline
 722 int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
 723                 struct lttng_cpuhp_node *node)
 724 {
 725         return 0;
 726 }
 727 #endif
 728
 729 struct lttng_event_enabler *lttng_event_enabler_create(
 730                 enum lttng_enabler_format_type format_type,
 731                 struct lttng_kernel_abi_event *event_param,
 732                 struct lttng_channel *chan);
 733
 734 int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
 735 int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
 736 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 737                 struct lttng_event_notifier_group *event_notifier_group,
 738                 enum lttng_enabler_format_type format_type,
 739                 struct lttng_kernel_abi_event_notifier *event_notifier_param);
 740
 741 int lttng_event_notifier_enabler_enable(
 742                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 743 int lttng_event_notifier_enabler_disable(
 744                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 745
 746 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
 747                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 748 int lttng_event_notifier_enabler_attach_filter_bytecode(
 749                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 750                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 751 int lttng_event_notifier_enabler_attach_capture_bytecode(
 752                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 753                 struct lttng_kernel_abi_capture_bytecode __user *bytecode);
 754
 755 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc,
 756                 struct lttng_enabler *enabler);
 757
 758 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc,
 759                 struct lttng_kernel_ctx *ctx,
 760                 struct list_head *instance_bytecode_runtime_head,
 761                 struct list_head *enabler_bytecode_runtime_head);
 762
 763 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
 764 int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler);
 765 int lttng_syscalls_unregister_channel(struct lttng_channel *chan);
 766 int lttng_syscalls_destroy_event(struct lttng_channel *chan);
 767 int lttng_syscall_filter_enable_event(
 768                 struct lttng_channel *chan,
 769                 struct lttng_kernel_event_recorder *event);
 770 int lttng_syscall_filter_disable_event(
 771                 struct lttng_channel *chan,
 772                 struct lttng_kernel_event_recorder *event);
 773
 774 long lttng_channel_syscall_mask(struct lttng_channel *channel,
 775                 struct lttng_kernel_abi_syscall_mask __user *usyscall_mask);
 776
 777 int lttng_syscalls_register_event_notifier(
 778                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 779 int lttng_syscalls_create_matching_event_notifiers(
 780                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 781 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group);
 782 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 783 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 784 #else
 785 static inline int lttng_syscalls_register_event(
 786                 struct lttng_event_enabler *event_enabler)
 787 {
 788         return -ENOSYS;
 789 }
 790
 791 static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan)
 792 {
 793         return 0;
 794 }
 795
 796 static inline int lttng_syscalls_destroy(struct lttng_channel *chan)
 797 {
 798         return 0;
 799 }
 800
 801 static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
 802                 struct lttng_kernel_event_recorder *event);
 803 {
 804         return -ENOSYS;
 805 }
 806
 807 static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
 808                 struct lttng_kernel_event_recorder *event);
 809 {
 810         return -ENOSYS;
 811 }
 812
 813 static inline long lttng_channel_syscall_mask(struct lttng_channel *channel,
 814                 struct lttng_kernel_syscall_mask __user *usyscall_mask)
 815 {
 816         return -ENOSYS;
 817 }
 818
 819 static inline int lttng_syscalls_register_event_notifier(
 820                 struct lttng_event_notifier_group *group)
 821 {
 822         return -ENOSYS;
 823 }
 824
 825 static inline int lttng_syscalls_unregister_event_notifier_group(
 826                 struct lttng_event_notifier_group *group)
 827 {
 828         return 0;
 829 }
 830
 831 static inline int lttng_syscall_filter_enable_event_notifier(
 832                 struct lttng_event_notifier_group *group,
 833                 const char *name)
 834 {
 835         return -ENOSYS;
 836 }
 837
 838 static inline int lttng_syscall_filter_disable_event_notifier(
 839                 struct lttng_event_notifier_group *group,
 840                 const char *name)
 841 {
 842         return -ENOSYS;
 843 }
 844
 845 #endif
 846
 847 #ifdef CONFIG_KPROBES
 848 int lttng_kprobes_register_event(const char *name,
 849                 const char *symbol_name,
 850                 uint64_t offset,
 851                 uint64_t addr,
 852                 struct lttng_kernel_event_recorder *event);
 853 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 854 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 855 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 856                 uint64_t offset,
 857                 uint64_t addr,
 858                 struct lttng_kernel_event_notifier *event_notifier);
 859 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 860 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 861 #else
 862 static inline
 863 int lttng_kprobes_register_event(const char *name,
 864                 const char *symbol_name,
 865                 uint64_t offset,
 866                 uint64_t addr,
 867                 struct lttng_kernel_event_recorder *event)
 868 {
 869         return -ENOSYS;
 870 }
 871
 872 static inline
 873 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 874 {
 875 }
 876
 877 static inline
 878 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 879 {
 880 }
 881
 882 static inline
 883 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 884                 uint64_t offset,
 885                 uint64_t addr,
 886                 struct lttng_kernel_event_notifier *event_notifier)
 887 {
 888         return -ENOSYS;
 889 }
 890
 891 static inline
 892 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 893 {
 894 }
 895
 896 static inline
 897 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 898 {
 899 }
 900 #endif
 901
 902 int lttng_event_add_callsite(struct lttng_kernel_event_common *event,
 903         struct lttng_kernel_abi_event_callsite __user *callsite);
 904
 905 #ifdef CONFIG_UPROBES
 906 int lttng_uprobes_register_event(const char *name,
 907         int fd, struct lttng_kernel_event_recorder *event);
 908 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
 909         struct lttng_kernel_abi_event_callsite __user *callsite);
 910 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 911 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 912 int lttng_uprobes_register_event_notifier(const char *name,
 913         int fd, struct lttng_kernel_event_notifier *event_notifier);
 914 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 915 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 916 #else
 917 static inline
 918 int lttng_uprobes_register_event(const char *name,
 919         int fd, struct lttng_kernel_event_recorder *event)
 920 {
 921         return -ENOSYS;
 922 }
 923
 924 static inline
 925 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
 926         struct lttng_kernel_abi_event_callsite __user *callsite)
 927 {
 928         return -ENOSYS;
 929 }
 930
 931 static inline
 932 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 933 {
 934 }
 935
 936 static inline
 937 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 938 {
 939 }
 940
 941 static inline
 942 int lttng_uprobes_register_event_notifier(const char *name,
 943         int fd, struct lttng_kernel_event_notifier *event_notifier)
 944 {
 945         return -ENOSYS;
 946 }
 947
 948 static inline
 949 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 950 {
 951 }
 952
 953 static inline
 954 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 955 {
 956 }
 957 #endif
 958
 959 #ifdef CONFIG_KRETPROBES
 960 int lttng_kretprobes_register(const char *name,
 961                 const char *symbol_name,
 962                 uint64_t offset,
 963                 uint64_t addr,
 964                 struct lttng_kernel_event_recorder *event_entry,
 965                 struct lttng_kernel_event_recorder *event_exit);
 966 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event);
 967 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event);
 968 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
 969         int enable);
 970 #else
 971 static inline
 972 int lttng_kretprobes_register(const char *name,
 973                 const char *symbol_name,
 974                 uint64_t offset,
 975                 uint64_t addr,
 976                 struct lttng_kernel_event_recorder *event_entry,
 977                 struct lttng_kernel_event_recorder *event_exit)
 978 {
 979         return -ENOSYS;
 980 }
 981
 982 static inline
 983 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event)
 984 {
 985 }
 986
 987 static inline
 988 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event)
 989 {
 990 }
 991
 992 static inline
 993 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
 994         int enable)
 995 {
 996         return -ENOSYS;
 997 }
 998 #endif
 999
1000 void lttng_lock_sessions(void);
1001 void lttng_unlock_sessions(void);
1002
1003 struct list_head *lttng_get_probe_list_head(void);
1004
1005 int lttng_fix_pending_events(void);
1006 int lttng_fix_pending_event_notifiers(void);
1007 int lttng_session_active(void);
1008 bool lttng_event_notifier_active(void);
1009
1010 struct lttng_kernel_session *lttng_session_create(void);
1011 int lttng_session_enable(struct lttng_kernel_session *session);
1012 int lttng_session_disable(struct lttng_kernel_session *session);
1013 void lttng_session_destroy(struct lttng_kernel_session *session);
1014 int lttng_session_metadata_regenerate(struct lttng_kernel_session *session);
1015 int lttng_session_statedump(struct lttng_kernel_session *session);
1016 void metadata_cache_destroy(struct kref *kref);
1017
1018 struct lttng_counter *lttng_kernel_counter_create(
1019                 const char *counter_transport_name, size_t number_dimensions,
1020                 const size_t *dimensions_sizes);
1021 int lttng_kernel_counter_read(struct lttng_counter *counter,
1022                 const size_t *dimension_indexes, int32_t cpu,
1023                 int64_t *val, bool *overflow, bool *underflow);
1024 int lttng_kernel_counter_aggregate(struct lttng_counter *counter,
1025                 const size_t *dimension_indexes, int64_t *val,
1026                 bool *overflow, bool *underflow);
1027 int lttng_kernel_counter_clear(struct lttng_counter *counter,
1028                 const size_t *dimension_indexes);
1029 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
1030 int lttng_event_notifier_group_create_error_counter(
1031                 struct file *event_notifier_group_file,
1032                 const struct lttng_kernel_abi_counter_conf *error_counter_conf);
1033 void lttng_event_notifier_group_destroy(
1034                 struct lttng_event_notifier_group *event_notifier_group);
1035
1036 struct lttng_channel *lttng_channel_create(struct lttng_kernel_session *session,
1037                                        const char *transport_name,
1038                                        void *buf_addr,
1039                                        size_t subbuf_size, size_t num_subbuf,
1040                                        unsigned int switch_timer_interval,
1041                                        unsigned int read_timer_interval,
1042                                        enum channel_type channel_type);
1043 struct lttng_channel *lttng_global_channel_create(struct lttng_kernel_session *session,
1044                                        int overwrite, void *buf_addr,
1045                                        size_t subbuf_size, size_t num_subbuf,
1046                                        unsigned int switch_timer_interval,
1047                                        unsigned int read_timer_interval);
1048
1049 void lttng_metadata_channel_destroy(struct lttng_channel *chan);
1050 struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_channel *chan,
1051                                 struct lttng_kernel_abi_event *event_param,
1052                                 const struct lttng_kernel_event_desc *event_desc,
1053                                 enum lttng_kernel_abi_instrumentation itype);
1054 struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_channel *chan,
1055                                 struct lttng_kernel_abi_event *event_param,
1056                                 const struct lttng_kernel_event_desc *event_desc,
1057                                 enum lttng_kernel_abi_instrumentation itype);
1058 struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_channel *chan,
1059                 struct lttng_kernel_abi_old_event *old_event_param,
1060                 const struct lttng_kernel_event_desc *internal_desc);
1061
1062 struct lttng_kernel_event_notifier *lttng_event_notifier_create(
1063                                 const struct lttng_kernel_event_desc *event_notifier_desc,
1064                                 uint64_t id,
1065                                 uint64_t error_counter_idx,
1066                                 struct lttng_event_notifier_group *event_notifier_group,
1067                                 struct lttng_kernel_abi_event_notifier *event_notifier_param,
1068                                 enum lttng_kernel_abi_instrumentation itype);
1069 struct lttng_kernel_event_notifier *_lttng_event_notifier_create(
1070                                 const struct lttng_kernel_event_desc *event_notifier_desc,
1071                                 uint64_t id,
1072                                 uint64_t error_counter_idx,
1073                                 struct lttng_event_notifier_group *event_notifier_group,
1074                                 struct lttng_kernel_abi_event_notifier *event_notifier_param,
1075                                 enum lttng_kernel_abi_instrumentation itype);
1076
1077 int lttng_channel_enable(struct lttng_channel *channel);
1078 int lttng_channel_disable(struct lttng_channel *channel);
1079 int lttng_event_enable(struct lttng_kernel_event_common *event);
1080 int lttng_event_disable(struct lttng_kernel_event_common *event);
1081
1082 void lttng_transport_register(struct lttng_transport *transport);
1083 void lttng_transport_unregister(struct lttng_transport *transport);
1084
1085 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
1086 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
1087
1088 void synchronize_trace(void);
1089 int lttng_abi_init(void);
1090 int lttng_abi_compat_old_init(void);
1091 void lttng_abi_exit(void);
1092 void lttng_abi_compat_old_exit(void);
1093
1094 const struct lttng_kernel_event_desc *lttng_event_desc_get(const char *name);
1095 void lttng_event_desc_put(const struct lttng_kernel_event_desc *desc);
1096 int lttng_probes_init(void);
1097 void lttng_probes_exit(void);
1098
1099 int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
1100                 struct channel *chan, bool *coherent);
1101
1102 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node);
1103 int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker *lf);
1104 int lttng_id_tracker_init(struct lttng_kernel_id_tracker *lf,
1105                 struct lttng_kernel_session *session,
1106                 enum tracker_type type);
1107 void lttng_id_tracker_fini(struct lttng_kernel_id_tracker *lf);
1108 void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker *lf, bool rcu);
1109 int lttng_id_tracker_add(struct lttng_kernel_id_tracker *lf, int id);
1110 int lttng_id_tracker_del(struct lttng_kernel_id_tracker *lf, int id);
1111
1112 int lttng_session_track_id(struct lttng_kernel_session *session,
1113                 enum tracker_type tracker_type, int id);
1114 int lttng_session_untrack_id(struct lttng_kernel_session *session,
1115                 enum tracker_type tracker_type, int id);
1116
1117 int lttng_session_list_tracker_ids(struct lttng_kernel_session *session,
1118                 enum tracker_type tracker_type);
1119
1120 void lttng_clock_ref(void);
1121 void lttng_clock_unref(void);
1122
1123 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common *event);
1124
1125 int lttng_probes_init(void);
1126
1127 int lttng_logger_init(void);
1128 void lttng_logger_exit(void);
1129
1130 extern int lttng_statedump_start(struct lttng_kernel_session *session);
1131
1132 int lttng_calibrate(struct lttng_kernel_abi_calibrate *calibrate);
1133
1134 extern const struct file_operations lttng_tracepoint_list_fops;
1135 extern const struct file_operations lttng_syscall_list_fops;
1136
1137 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv)    \
1138         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, {                                 \
1139                 .event_field = (_event_field),                                                          \
1140                 .get_size = (_get_size),                                                                \
1141                 .record = (_record),                                                                    \
1142                 .get_value = (_get_value),                                                              \
1143                 .destroy = (_destroy),                                                                  \
1144                 .priv = (_priv),                                                                        \
1145         })
1146
1147 #endif /* _LTTNG_EVENTS_INTERNAL_H */