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 struct lttng_event_notifier_group {
 348         struct file *file;              /* File associated to event notifier group */
 349         struct file *notif_file;        /* File used to expose notifications to userspace. */
 350         struct list_head node;          /* event notifier group list */
 351         struct list_head enablers_head; /* List of enablers */
 352         struct list_head event_notifiers_head; /* List of event notifier */
 353         struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */
 354         struct lttng_kernel_channel_buffer_ops *ops;
 355         struct lttng_transport *transport;
 356         struct channel *chan;           /* Ring buffer channel for event notifier group. */
 357         struct lib_ring_buffer *buf;    /* Ring buffer for event notifier group. */
 358         wait_queue_head_t read_wait;
 359         struct irq_work wakeup_pending; /* Pending wakeup irq work. */
 360         struct lttng_kernel_event_notifier *sc_unknown; /* for unknown syscalls */
 361         struct lttng_kernel_event_notifier *sc_compat_unknown;
 362
 363         struct lttng_syscall_filter *sc_filter;
 364
 365         struct hlist_head *event_notifier_syscall_dispatch;
 366         struct hlist_head *event_notifier_compat_syscall_dispatch;
 367         struct hlist_head *event_notifier_exit_syscall_dispatch;
 368         struct hlist_head *event_notifier_exit_compat_syscall_dispatch;
 369
 370         struct hlist_head event_notifier_unknown_syscall_dispatch;
 371         struct hlist_head event_notifier_compat_unknown_syscall_dispatch;
 372         struct hlist_head event_notifier_exit_unknown_syscall_dispatch;
 373         struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch;
 374
 375         int syscall_all_entry;
 376         int syscall_all_exit;
 377
 378         unsigned int sys_enter_registered:1, sys_exit_registered:1;
 379
 380         struct lttng_counter *error_counter;
 381         size_t error_counter_len;
 382 };
 383
 384 struct lttng_transport {
 385         char *name;
 386         struct module *owner;
 387         struct list_head node;
 388         struct lttng_kernel_channel_buffer_ops ops;
 389 };
 390
 391 struct lttng_counter_transport {
 392         char *name;
 393         struct module *owner;
 394         struct list_head node;
 395         struct lttng_counter_ops ops;
 396 };
 397
 398 struct lttng_kernel_session_private {
 399         struct lttng_kernel_session *pub;       /* Public session interface */
 400
 401         int been_active;                        /* Has trace session been active ? */
 402         struct file *file;                      /* File associated to session */
 403         struct list_head chan;                  /* Channel list head */
 404         struct list_head events;                /* Event list head */
 405         struct list_head list;                  /* Session list */
 406         unsigned int free_chan_id;              /* Next chan ID to allocate */
 407         uuid_le uuid;                           /* Trace session unique ID */
 408         struct lttng_metadata_cache *metadata_cache;
 409         unsigned int metadata_dumped:1,
 410                 tstate:1;                       /* Transient enable state */
 411         /* List of event enablers */
 412         struct list_head enablers_head;
 413         /* Hash table of events */
 414         struct lttng_event_ht events_ht;
 415         char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
 416         char creation_time[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
 417 };
 418
 419 struct lttng_id_hash_node {
 420         struct hlist_node hlist;
 421         int id;
 422 };
 423
 424 enum tracker_type {
 425         TRACKER_PID,
 426         TRACKER_VPID,
 427         TRACKER_UID,
 428         TRACKER_VUID,
 429         TRACKER_GID,
 430         TRACKER_VGID,
 431
 432         TRACKER_UNKNOWN,
 433 };
 434
 435 struct lttng_kernel_id_tracker_private {
 436         struct lttng_kernel_id_tracker *pub;    /* Public interface */
 437
 438         struct lttng_kernel_session *session;
 439         enum tracker_type tracker_type;
 440 };
 441
 442 extern struct lttng_kernel_ctx *lttng_static_ctx;
 443
 444 static inline
 445 const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type)
 446 {
 447         if (type->type != lttng_kernel_type_integer)
 448                 return NULL;
 449         return container_of(type, const struct lttng_kernel_type_integer, parent);
 450 }
 451
 452 static inline
 453 const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type)
 454 {
 455         if (type->type != lttng_kernel_type_string)
 456                 return NULL;
 457         return container_of(type, const struct lttng_kernel_type_string, parent);
 458 }
 459
 460 static inline
 461 const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type)
 462 {
 463         if (type->type != lttng_kernel_type_enum)
 464                 return NULL;
 465         return container_of(type, const struct lttng_kernel_type_enum, parent);
 466 }
 467
 468 static inline
 469 const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type)
 470 {
 471         if (type->type != lttng_kernel_type_array)
 472                 return NULL;
 473         return container_of(type, const struct lttng_kernel_type_array, parent);
 474 }
 475
 476 static inline
 477 const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type)
 478 {
 479         if (type->type != lttng_kernel_type_sequence)
 480                 return NULL;
 481         return container_of(type, const struct lttng_kernel_type_sequence, parent);
 482 }
 483
 484 static inline
 485 const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type)
 486 {
 487         if (type->type != lttng_kernel_type_struct)
 488                 return NULL;
 489         return container_of(type, const struct lttng_kernel_type_struct, parent);
 490 }
 491
 492 static inline
 493 const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type)
 494 {
 495         if (type->type != lttng_kernel_type_variant)
 496                 return NULL;
 497         return container_of(type, const struct lttng_kernel_type_variant, parent);
 498 }
 499
 500 static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type)
 501 {
 502         const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type);
 503
 504         if (!type_integer)
 505                 return false;
 506         switch (type_integer->size) {
 507         case 8:         /* Fall-through. */
 508         case 16:        /* Fall-through. */
 509         case 32:        /* Fall-through. */
 510         case 64:
 511                 break;
 512         default:
 513                 return false;
 514         }
 515         return true;
 516 }
 517
 518 int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event,
 519                 const char *interpreter_stack_data,
 520                 struct lttng_kernel_probe_ctx *probe_ctx,
 521                 void *event_filter_ctx);
 522
 523 static inline
 524 struct lttng_enabler *lttng_event_enabler_as_enabler(
 525                 struct lttng_event_enabler *event_enabler)
 526 {
 527         return &event_enabler->base;
 528 }
 529
 530 static inline
 531 struct lttng_enabler *lttng_event_notifier_enabler_as_enabler(
 532                 struct lttng_event_notifier_enabler *event_notifier_enabler)
 533 {
 534         return &event_notifier_enabler->base;
 535 }
 536
 537 int lttng_context_init(void);
 538 void lttng_context_exit(void);
 539 int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p,
 540                 const struct lttng_kernel_ctx_field *f);
 541 void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p);
 542 struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx,
 543                 size_t index);
 544 int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name);
 545 int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name);
 546 void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx);
 547 int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx);
 548 int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx);
 549 int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx);
 550 int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx);
 551 int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx);
 552 int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx);
 553 int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx);
 554 int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx);
 555 int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx);
 556 int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx);
 557 int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx);
 558 int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx);
 559 int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx);
 560 #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT)
 561 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx);
 562 #else
 563 static inline
 564 int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx)
 565 {
 566         return -ENOSYS;
 567 }
 568 #endif
 569 #ifdef CONFIG_PREEMPT_RT_FULL
 570 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx);
 571 #else
 572 static inline
 573 int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx)
 574 {
 575         return -ENOSYS;
 576 }
 577 #endif
 578
 579 int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type);
 580
 581 #if defined(CONFIG_CGROUPS) && \
 582         ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \
 583          LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0))
 584 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 585 #else
 586 static inline
 587 int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 588 {
 589         return -ENOSYS;
 590 }
 591 #endif
 592
 593 #if defined(CONFIG_IPC_NS) && \
 594         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 595 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 596 #else
 597 static inline
 598 int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 599 {
 600         return -ENOSYS;
 601 }
 602 #endif
 603
 604 #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \
 605         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 606 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 607 #else
 608 static inline
 609 int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 610 {
 611         return -ENOSYS;
 612 }
 613 #endif
 614
 615 #if defined(CONFIG_NET_NS) && \
 616         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 617 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 618 #else
 619 static inline
 620 int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 621 {
 622         return -ENOSYS;
 623 }
 624 #endif
 625
 626 #if defined(CONFIG_PID_NS) && \
 627         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 628 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 629 #else
 630 static inline
 631 int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 632 {
 633         return -ENOSYS;
 634 }
 635 #endif
 636
 637 #if defined(CONFIG_USER_NS) && \
 638         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 639 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 640 #else
 641 static inline
 642 int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 643 {
 644         return -ENOSYS;
 645 }
 646 #endif
 647
 648 #if defined(CONFIG_UTS_NS) && \
 649         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0))
 650 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 651 #else
 652 static inline
 653 int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 654 {
 655         return -ENOSYS;
 656 }
 657 #endif
 658
 659 #if defined(CONFIG_TIME_NS) && \
 660         (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0))
 661 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx);
 662 #else
 663 static inline
 664 int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx)
 665 {
 666         return -ENOSYS;
 667 }
 668 #endif
 669
 670 int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx);
 671 int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx);
 672 int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx);
 673 int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx);
 674 int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx);
 675 int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx);
 676 int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx);
 677 int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx);
 678 int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx);
 679 int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx);
 680 int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx);
 681 int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx);
 682
 683 #if defined(CONFIG_PERF_EVENTS)
 684 int lttng_add_perf_counter_to_ctx(uint32_t type,
 685                                   uint64_t config,
 686                                   const char *name,
 687                                   struct lttng_kernel_ctx **ctx);
 688 int lttng_cpuhp_perf_counter_online(unsigned int cpu,
 689                 struct lttng_cpuhp_node *node);
 690 int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
 691                 struct lttng_cpuhp_node *node);
 692 #else
 693 static inline
 694 int lttng_add_perf_counter_to_ctx(uint32_t type,
 695                                   uint64_t config,
 696                                   const char *name,
 697                                   struct lttng_kernel_ctx **ctx)
 698 {
 699         return -ENOSYS;
 700 }
 701 static inline
 702 int lttng_cpuhp_perf_counter_online(unsigned int cpu,
 703                 struct lttng_cpuhp_node *node)
 704 {
 705         return 0;
 706 }
 707 static inline
 708 int lttng_cpuhp_perf_counter_dead(unsigned int cpu,
 709                 struct lttng_cpuhp_node *node)
 710 {
 711         return 0;
 712 }
 713 #endif
 714
 715 struct lttng_event_enabler *lttng_event_enabler_create(
 716                 enum lttng_enabler_format_type format_type,
 717                 struct lttng_kernel_abi_event *event_param,
 718                 struct lttng_channel *chan);
 719
 720 int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
 721 int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
 722 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 723                 struct lttng_event_notifier_group *event_notifier_group,
 724                 enum lttng_enabler_format_type format_type,
 725                 struct lttng_kernel_abi_event_notifier *event_notifier_param);
 726
 727 int lttng_event_notifier_enabler_enable(
 728                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 729 int lttng_event_notifier_enabler_disable(
 730                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 731
 732 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
 733                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 734 int lttng_event_notifier_enabler_attach_filter_bytecode(
 735                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 736                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 737 int lttng_event_notifier_enabler_attach_capture_bytecode(
 738                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 739                 struct lttng_kernel_abi_capture_bytecode __user *bytecode);
 740
 741 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc,
 742                 struct lttng_enabler *enabler);
 743
 744 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc,
 745                 struct lttng_kernel_ctx *ctx,
 746                 struct list_head *instance_bytecode_runtime_head,
 747                 struct list_head *enabler_bytecode_runtime_head);
 748
 749 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
 750 int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler);
 751 int lttng_syscalls_unregister_channel(struct lttng_channel *chan);
 752 int lttng_syscalls_destroy_event(struct lttng_channel *chan);
 753 int lttng_syscall_filter_enable_event(
 754                 struct lttng_channel *chan,
 755                 struct lttng_kernel_event_recorder *event);
 756 int lttng_syscall_filter_disable_event(
 757                 struct lttng_channel *chan,
 758                 struct lttng_kernel_event_recorder *event);
 759
 760 long lttng_channel_syscall_mask(struct lttng_channel *channel,
 761                 struct lttng_kernel_abi_syscall_mask __user *usyscall_mask);
 762
 763 int lttng_syscalls_register_event_notifier(
 764                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 765 int lttng_syscalls_create_matching_event_notifiers(
 766                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 767 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group);
 768 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 769 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 770 #else
 771 static inline int lttng_syscalls_register_event(
 772                 struct lttng_event_enabler *event_enabler)
 773 {
 774         return -ENOSYS;
 775 }
 776
 777 static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan)
 778 {
 779         return 0;
 780 }
 781
 782 static inline int lttng_syscalls_destroy(struct lttng_channel *chan)
 783 {
 784         return 0;
 785 }
 786
 787 static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
 788                 struct lttng_kernel_event_recorder *event);
 789 {
 790         return -ENOSYS;
 791 }
 792
 793 static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
 794                 struct lttng_kernel_event_recorder *event);
 795 {
 796         return -ENOSYS;
 797 }
 798
 799 static inline long lttng_channel_syscall_mask(struct lttng_channel *channel,
 800                 struct lttng_kernel_syscall_mask __user *usyscall_mask)
 801 {
 802         return -ENOSYS;
 803 }
 804
 805 static inline int lttng_syscalls_register_event_notifier(
 806                 struct lttng_event_notifier_group *group)
 807 {
 808         return -ENOSYS;
 809 }
 810
 811 static inline int lttng_syscalls_unregister_event_notifier_group(
 812                 struct lttng_event_notifier_group *group)
 813 {
 814         return 0;
 815 }
 816
 817 static inline int lttng_syscall_filter_enable_event_notifier(
 818                 struct lttng_event_notifier_group *group,
 819                 const char *name)
 820 {
 821         return -ENOSYS;
 822 }
 823
 824 static inline int lttng_syscall_filter_disable_event_notifier(
 825                 struct lttng_event_notifier_group *group,
 826                 const char *name)
 827 {
 828         return -ENOSYS;
 829 }
 830
 831 #endif
 832
 833 #ifdef CONFIG_KPROBES
 834 int lttng_kprobes_register_event(const char *name,
 835                 const char *symbol_name,
 836                 uint64_t offset,
 837                 uint64_t addr,
 838                 struct lttng_kernel_event_recorder *event);
 839 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 840 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 841 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 842                 uint64_t offset,
 843                 uint64_t addr,
 844                 struct lttng_kernel_event_notifier *event_notifier);
 845 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 846 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 847 #else
 848 static inline
 849 int lttng_kprobes_register_event(const char *name,
 850                 const char *symbol_name,
 851                 uint64_t offset,
 852                 uint64_t addr,
 853                 struct lttng_kernel_event_recorder *event)
 854 {
 855         return -ENOSYS;
 856 }
 857
 858 static inline
 859 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 860 {
 861 }
 862
 863 static inline
 864 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 865 {
 866 }
 867
 868 static inline
 869 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 870                 uint64_t offset,
 871                 uint64_t addr,
 872                 struct lttng_kernel_event_notifier *event_notifier)
 873 {
 874         return -ENOSYS;
 875 }
 876
 877 static inline
 878 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 879 {
 880 }
 881
 882 static inline
 883 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 884 {
 885 }
 886 #endif
 887
 888 int lttng_event_add_callsite(struct lttng_kernel_event_common *event,
 889         struct lttng_kernel_abi_event_callsite __user *callsite);
 890
 891 #ifdef CONFIG_UPROBES
 892 int lttng_uprobes_register_event(const char *name,
 893         int fd, struct lttng_kernel_event_recorder *event);
 894 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
 895         struct lttng_kernel_abi_event_callsite __user *callsite);
 896 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 897 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 898 int lttng_uprobes_register_event_notifier(const char *name,
 899         int fd, struct lttng_kernel_event_notifier *event_notifier);
 900 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 901 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 902 #else
 903 static inline
 904 int lttng_uprobes_register_event(const char *name,
 905         int fd, struct lttng_kernel_event_recorder *event)
 906 {
 907         return -ENOSYS;
 908 }
 909
 910 static inline
 911 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
 912         struct lttng_kernel_abi_event_callsite __user *callsite)
 913 {
 914         return -ENOSYS;
 915 }
 916
 917 static inline
 918 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 919 {
 920 }
 921
 922 static inline
 923 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 924 {
 925 }
 926
 927 static inline
 928 int lttng_uprobes_register_event_notifier(const char *name,
 929         int fd, struct lttng_kernel_event_notifier *event_notifier)
 930 {
 931         return -ENOSYS;
 932 }
 933
 934 static inline
 935 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 936 {
 937 }
 938
 939 static inline
 940 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 941 {
 942 }
 943 #endif
 944
 945 #ifdef CONFIG_KRETPROBES
 946 int lttng_kretprobes_register(const char *name,
 947                 const char *symbol_name,
 948                 uint64_t offset,
 949                 uint64_t addr,
 950                 struct lttng_kernel_event_recorder *event_entry,
 951                 struct lttng_kernel_event_recorder *event_exit);
 952 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event);
 953 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event);
 954 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
 955         int enable);
 956 #else
 957 static inline
 958 int lttng_kretprobes_register(const char *name,
 959                 const char *symbol_name,
 960                 uint64_t offset,
 961                 uint64_t addr,
 962                 struct lttng_kernel_event_recorder *event_entry,
 963                 struct lttng_kernel_event_recorder *event_exit)
 964 {
 965         return -ENOSYS;
 966 }
 967
 968 static inline
 969 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event)
 970 {
 971 }
 972
 973 static inline
 974 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event)
 975 {
 976 }
 977
 978 static inline
 979 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
 980         int enable)
 981 {
 982         return -ENOSYS;
 983 }
 984 #endif
 985
 986 void lttng_lock_sessions(void);
 987 void lttng_unlock_sessions(void);
 988
 989 struct list_head *lttng_get_probe_list_head(void);
 990
 991 int lttng_fix_pending_events(void);
 992 int lttng_fix_pending_event_notifiers(void);
 993 int lttng_session_active(void);
 994 bool lttng_event_notifier_active(void);
 995
 996 struct lttng_kernel_session *lttng_session_create(void);
 997 int lttng_session_enable(struct lttng_kernel_session *session);
 998 int lttng_session_disable(struct lttng_kernel_session *session);
 999 void lttng_session_destroy(struct lttng_kernel_session *session);
1000 int lttng_session_metadata_regenerate(struct lttng_kernel_session *session);
1001 int lttng_session_statedump(struct lttng_kernel_session *session);
1002 void metadata_cache_destroy(struct kref *kref);
1003
1004 struct lttng_counter *lttng_kernel_counter_create(
1005                 const char *counter_transport_name, size_t number_dimensions,
1006                 const size_t *dimensions_sizes);
1007 int lttng_kernel_counter_read(struct lttng_counter *counter,
1008                 const size_t *dimension_indexes, int32_t cpu,
1009                 int64_t *val, bool *overflow, bool *underflow);
1010 int lttng_kernel_counter_aggregate(struct lttng_counter *counter,
1011                 const size_t *dimension_indexes, int64_t *val,
1012                 bool *overflow, bool *underflow);
1013 int lttng_kernel_counter_clear(struct lttng_counter *counter,
1014                 const size_t *dimension_indexes);
1015 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
1016 int lttng_event_notifier_group_create_error_counter(
1017                 struct file *event_notifier_group_file,
1018                 const struct lttng_kernel_abi_counter_conf *error_counter_conf);
1019 void lttng_event_notifier_group_destroy(
1020                 struct lttng_event_notifier_group *event_notifier_group);
1021
1022 struct lttng_channel *lttng_channel_create(struct lttng_kernel_session *session,
1023                                        const char *transport_name,
1024                                        void *buf_addr,
1025                                        size_t subbuf_size, size_t num_subbuf,
1026                                        unsigned int switch_timer_interval,
1027                                        unsigned int read_timer_interval,
1028                                        enum channel_type channel_type);
1029 struct lttng_channel *lttng_global_channel_create(struct lttng_kernel_session *session,
1030                                        int overwrite, void *buf_addr,
1031                                        size_t subbuf_size, size_t num_subbuf,
1032                                        unsigned int switch_timer_interval,
1033                                        unsigned int read_timer_interval);
1034
1035 void lttng_metadata_channel_destroy(struct lttng_channel *chan);
1036 struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_channel *chan,
1037                                 struct lttng_kernel_abi_event *event_param,
1038                                 const struct lttng_kernel_event_desc *event_desc,
1039                                 enum lttng_kernel_abi_instrumentation itype);
1040 struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_channel *chan,
1041                                 struct lttng_kernel_abi_event *event_param,
1042                                 const struct lttng_kernel_event_desc *event_desc,
1043                                 enum lttng_kernel_abi_instrumentation itype);
1044 struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_channel *chan,
1045                 struct lttng_kernel_abi_old_event *old_event_param,
1046                 const struct lttng_kernel_event_desc *internal_desc);
1047
1048 struct lttng_kernel_event_notifier *lttng_event_notifier_create(
1049                                 const struct lttng_kernel_event_desc *event_notifier_desc,
1050                                 uint64_t id,
1051                                 uint64_t error_counter_idx,
1052                                 struct lttng_event_notifier_group *event_notifier_group,
1053                                 struct lttng_kernel_abi_event_notifier *event_notifier_param,
1054                                 enum lttng_kernel_abi_instrumentation itype);
1055 struct lttng_kernel_event_notifier *_lttng_event_notifier_create(
1056                                 const struct lttng_kernel_event_desc *event_notifier_desc,
1057                                 uint64_t id,
1058                                 uint64_t error_counter_idx,
1059                                 struct lttng_event_notifier_group *event_notifier_group,
1060                                 struct lttng_kernel_abi_event_notifier *event_notifier_param,
1061                                 enum lttng_kernel_abi_instrumentation itype);
1062
1063 int lttng_channel_enable(struct lttng_channel *channel);
1064 int lttng_channel_disable(struct lttng_channel *channel);
1065 int lttng_event_enable(struct lttng_kernel_event_common *event);
1066 int lttng_event_disable(struct lttng_kernel_event_common *event);
1067
1068 void lttng_transport_register(struct lttng_transport *transport);
1069 void lttng_transport_unregister(struct lttng_transport *transport);
1070
1071 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
1072 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
1073
1074 void synchronize_trace(void);
1075 int lttng_abi_init(void);
1076 int lttng_abi_compat_old_init(void);
1077 void lttng_abi_exit(void);
1078 void lttng_abi_compat_old_exit(void);
1079
1080 const struct lttng_kernel_event_desc *lttng_event_desc_get(const char *name);
1081 void lttng_event_desc_put(const struct lttng_kernel_event_desc *desc);
1082 int lttng_probes_init(void);
1083 void lttng_probes_exit(void);
1084
1085 int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
1086                 struct channel *chan, bool *coherent);
1087
1088 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node);
1089 int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker *lf);
1090 int lttng_id_tracker_init(struct lttng_kernel_id_tracker *lf,
1091                 struct lttng_kernel_session *session,
1092                 enum tracker_type type);
1093 void lttng_id_tracker_fini(struct lttng_kernel_id_tracker *lf);
1094 void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker *lf, bool rcu);
1095 int lttng_id_tracker_add(struct lttng_kernel_id_tracker *lf, int id);
1096 int lttng_id_tracker_del(struct lttng_kernel_id_tracker *lf, int id);
1097
1098 int lttng_session_track_id(struct lttng_kernel_session *session,
1099                 enum tracker_type tracker_type, int id);
1100 int lttng_session_untrack_id(struct lttng_kernel_session *session,
1101                 enum tracker_type tracker_type, int id);
1102
1103 int lttng_session_list_tracker_ids(struct lttng_kernel_session *session,
1104                 enum tracker_type tracker_type);
1105
1106 void lttng_clock_ref(void);
1107 void lttng_clock_unref(void);
1108
1109 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common *event);
1110
1111 int lttng_probes_init(void);
1112
1113 int lttng_logger_init(void);
1114 void lttng_logger_exit(void);
1115
1116 extern int lttng_statedump_start(struct lttng_kernel_session *session);
1117
1118 int lttng_calibrate(struct lttng_kernel_abi_calibrate *calibrate);
1119
1120 extern const struct file_operations lttng_tracepoint_list_fops;
1121 extern const struct file_operations lttng_syscall_list_fops;
1122
1123 #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv)    \
1124         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, {                                 \
1125                 .event_field = (_event_field),                                                          \
1126                 .get_size = (_get_size),                                                                \
1127                 .record = (_record),                                                                    \
1128                 .get_value = (_get_value),                                                              \
1129                 .destroy = (_destroy),                                                                  \
1130                 .priv = (_priv),                                                                        \
1131         })
1132
1133 #endif /* _LTTNG_EVENTS_INTERNAL_H */