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