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