include/lttng/events.h

   1 /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
   2  *
   3  * lttng/events.h
   4  *
   5  * Holds LTTng per-session event registry.
   6  *
   7  * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   8  */
   9
  10 #ifndef _LTTNG_EVENTS_H
  11 #define _LTTNG_EVENTS_H
  12
  13 #include <lttng/kernel-version.h>
  14 #include <linux/list.h>
  15 #include <linux/kprobes.h>
  16 #include <linux/kref.h>
  17 #include <linux/uuid.h>
  18 #include <linux/irq_work.h>
  19 #include <wrapper/uprobes.h>
  20 #include <lttng/cpuhotplug.h>
  21 #include <lttng/tracer.h>
  22 #include <lttng/abi.h>
  23 #include <lttng/abi-old.h>
  24 #include <lttng/endian.h>
  25
  26 #define lttng_is_signed_type(type)      (((type) -1) < (type) 1)
  27
  28 struct lttng_channel;
  29 struct lttng_session;
  30 struct lttng_metadata_cache;
  31 struct lib_ring_buffer_ctx;
  32 struct perf_event;
  33 struct perf_event_attr;
  34 struct lib_ring_buffer_config;
  35
  36 /* Type description */
  37
  38 enum lttng_kernel_type {
  39         lttng_kernel_type_integer,
  40         lttng_kernel_type_string,
  41         lttng_kernel_type_enum,
  42         lttng_kernel_type_array,
  43         lttng_kernel_type_sequence,
  44         lttng_kernel_type_struct,
  45         lttng_kernel_type_variant,
  46         NR_LTTNG_KERNEL_TYPES,
  47 };
  48
  49 enum lttng_kernel_string_encoding {
  50         lttng_kernel_string_encoding_none = 0,
  51         lttng_kernel_string_encoding_UTF8 = 1,
  52         lttng_kernel_string_encoding_ASCII = 2,
  53         NR_LTTNG_KERNEL_STRING_ENCODING,
  54 };
  55
  56 enum channel_type {
  57         PER_CPU_CHANNEL,
  58         METADATA_CHANNEL,
  59 };
  60
  61 struct lttng_kernel_enum_value {
  62         unsigned long long value;
  63         unsigned int signedness:1;
  64 };
  65
  66 struct lttng_kernel_enum_entry {
  67         struct lttng_kernel_enum_value start, end;      /* start and end are inclusive */
  68         const char *string;
  69         struct {
  70                 unsigned int is_auto:1;
  71         } options;
  72 };
  73
  74 /*
  75  * struct lttng_kernel_type_common is fixed-size. Its children inherits
  76  * from it by embedding struct lttng_kernel_type_common as its first field.
  77  */
  78 struct lttng_kernel_type_common {
  79         enum lttng_kernel_type type;
  80 };
  81
  82 struct lttng_kernel_type_integer {
  83         struct lttng_kernel_type_common parent;
  84         unsigned int size;              /* in bits */
  85         unsigned short alignment;       /* in bits */
  86         unsigned int signedness:1,
  87                 reverse_byte_order:1;
  88         unsigned int base;              /* 2, 8, 10, 16, for pretty print */
  89 };
  90
  91 struct lttng_kernel_type_string {
  92         struct lttng_kernel_type_common parent;
  93         enum lttng_kernel_string_encoding encoding;
  94 };
  95
  96 struct lttng_kernel_type_enum {
  97         struct lttng_kernel_type_common parent;
  98         const struct lttng_kernel_enum_desc *desc;      /* Enumeration mapping */
  99         const struct lttng_kernel_type_common *container_type;
 100 };
 101
 102 struct lttng_kernel_type_array {
 103         struct lttng_kernel_type_common parent;
 104         const struct lttng_kernel_type_common *elem_type;
 105         unsigned int length;                    /* Num. elems. */
 106         unsigned int alignment;
 107         enum lttng_kernel_string_encoding encoding;
 108 };
 109
 110 struct lttng_kernel_type_sequence {
 111         struct lttng_kernel_type_common parent;
 112         const char *length_name;        /* Length field name. If NULL, use previous field. */
 113         const struct lttng_kernel_type_common *elem_type;
 114         unsigned int alignment;         /* Alignment before elements. */
 115         enum lttng_kernel_string_encoding encoding;
 116 };
 117
 118 struct lttng_kernel_type_struct {
 119         struct lttng_kernel_type_common parent;
 120         unsigned int nr_fields;
 121         const struct lttng_kernel_event_field **fields; /* Array of pointers to fields. */
 122         unsigned int alignment;
 123 };
 124
 125 struct lttng_kernel_type_variant {
 126         struct lttng_kernel_type_common parent;
 127         const char *tag_name;           /* Tag field name. If NULL, use previous field. */
 128         const struct lttng_kernel_event_field **choices; /* Array of pointers to fields. */
 129         unsigned int nr_choices;
 130         unsigned int alignment;
 131 };
 132
 133 struct lttng_kernel_enum_desc {
 134         const char *name;
 135         const struct lttng_kernel_enum_entry **entries;
 136         unsigned int nr_entries;
 137 };
 138
 139 /* Event field description */
 140
 141 struct lttng_kernel_event_field {
 142         const char *name;
 143         const struct lttng_kernel_type_common *type;
 144         unsigned int nowrite:1,         /* do not write into trace */
 145                         user:1,         /* fetch from user-space */
 146                         nofilter:1;     /* do not consider for filter */
 147 };
 148
 149 #define lttng_kernel_static_type_integer(_size, _alignment, _signedness, _byte_order, _base)            \
 150         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_integer, { \
 151                 .parent = {                                                                             \
 152                         .type = lttng_kernel_type_integer,                                                      \
 153                 },                                                                                      \
 154                 .size = (_size),                                                                        \
 155                 .alignment = (_alignment),                                                              \
 156                 .signedness = (_signedness),                                                            \
 157                 .reverse_byte_order = (_byte_order) != __BYTE_ORDER,                                    \
 158                 .base = (_base),                                                                        \
 159         }))
 160
 161 #define lttng_kernel_static_type_integer_from_type(_type, _byte_order, _base)                           \
 162         lttng_kernel_static_type_integer(sizeof(_type) * CHAR_BIT,                                      \
 163                         lttng_alignof(_type) * CHAR_BIT,                                                \
 164                         lttng_is_signed_type(_type),                                                    \
 165                         _byte_order,                                                                    \
 166                         _base)
 167
 168 #define lttng_kernel_static_type_enum(_desc, _container_type)                                           \
 169         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_enum, { \
 170                 .parent = {                                                                             \
 171                         .type = lttng_kernel_type_enum,                                                 \
 172                 },                                                                                      \
 173                 .desc = (_desc),                                                                        \
 174                 .container_type = (_container_type),                                                    \
 175         }))
 176
 177 #define lttng_kernel_static_type_array(_length, _elem_type, _alignment, _encoding)                      \
 178         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_array, { \
 179                 .parent = {                                                                             \
 180                         .type = lttng_kernel_type_array,                                                \
 181                 },                                                                                      \
 182                 .length = (_length),                                                                    \
 183                 .alignment = (_alignment),                                                              \
 184                 .encoding = lttng_kernel_string_encoding_##_encoding,                                   \
 185                 .elem_type = (_elem_type),                                                              \
 186         }))
 187
 188 #define lttng_kernel_static_type_array_text(_length)                                                    \
 189         lttng_kernel_static_type_array(_length,                                                         \
 190                 lttng_kernel_static_type_integer(sizeof(char) * CHAR_BIT,                               \
 191                                 lttng_alignof(char) * CHAR_BIT, lttng_is_signed_type(char),             \
 192                                 __BYTE_ORDER, 10),                                                      \
 193                 0, UTF8)
 194
 195 #define lttng_kernel_static_type_sequence(_length_name, _elem_type, _alignment, _encoding)                      \
 196         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_sequence, { \
 197                 .parent = {                                                                             \
 198                         .type = lttng_kernel_type_sequence,                                             \
 199                 },                                                                                      \
 200                 .length_name = (_length_name),                                                          \
 201                 .alignment = (_alignment),                                                              \
 202                 .encoding = lttng_kernel_string_encoding_##_encoding,                                   \
 203                 .elem_type = (_elem_type),                                                              \
 204         }))
 205
 206 #define lttng_kernel_static_type_string(_encoding)                                                      \
 207         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_string, { \
 208                 .parent = {                                                                             \
 209                         .type = lttng_kernel_type_string,                                               \
 210                 },                                                                                      \
 211                 .encoding = lttng_kernel_string_encoding_##_encoding,                                   \
 212         }))
 213
 214 #define lttng_kernel_static_type_struct(_nr_fields, _fields, _alignment)                                \
 215         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_struct, { \
 216                 .parent = {                                                                             \
 217                         .type = lttng_kernel_type_struct,                                               \
 218                 },                                                                                      \
 219                 .nr_fields = (_nr_fields),                                                              \
 220                 .fields = _fields,                                                                      \
 221                 .alignment = (_alignment),                                                              \
 222         }))
 223
 224 #define lttng_kernel_static_type_variant(_nr_choices, _choices, _tag_name, _alignment)                  \
 225         ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_variant, { \
 226                 .parent = {                                                                             \
 227                         .type = lttng_kernel_type_variant,                                              \
 228                 },                                                                                      \
 229                 .tag_name = (_tag_name),                                                                \
 230                 .choices = _choices,                                                                    \
 231                 .nr_choices = (_nr_choices),                                                            \
 232                 .alignment = (_alignment),                                                              \
 233         }))
 234
 235 #define lttng_kernel_static_event_field(_name, _type, _nowrite, _user, _nofilter)                       \
 236         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_event_field, {                               \
 237                 .name = (_name),                                                                        \
 238                 .type = (_type),                                                                        \
 239                 .nowrite = (_nowrite),                                                                  \
 240                 .user = (_user),                                                                        \
 241                 .nofilter = (_nofilter),                                                                \
 242         })
 243
 244 #define lttng_kernel_static_event_field_array(_fields...)                                               \
 245         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_event_field *,                               \
 246                 _fields                                                                                 \
 247         )
 248
 249 #define lttng_kernel_static_enum_entry_value(_string, _value)                                           \
 250         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, {                                \
 251                 .start = {                                                                              \
 252                         .signedness = lttng_is_signed_type(__typeof__(_value)),                         \
 253                         .value = lttng_is_signed_type(__typeof__(_value)) ?                             \
 254                                 (long long) (_value) : (_value),                                        \
 255                 },                                                                                      \
 256                 .end = {                                                                                \
 257                         .signedness = lttng_is_signed_type(__typeof__(_value)),                         \
 258                         .value = lttng_is_signed_type(__typeof__(_value)) ?                             \
 259                                 (long long) (_value) : (_value),                                        \
 260                 },                                                                                      \
 261                 .string = (_string),                                                                    \
 262         }),
 263
 264 #define lttng_kernel_static_enum_entry_range(_string, _range_start, _range_end)                         \
 265         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, {                                \
 266                 .start = {                                                                              \
 267                         .signedness = lttng_is_signed_type(__typeof__(_range_start)),                   \
 268                         .value = lttng_is_signed_type(__typeof__(_range_start)) ?                       \
 269                                 (long long) (_range_start) : (_range_start),                            \
 270                 },                                                                                      \
 271                 .end = {                                                                                \
 272                         .signedness = lttng_is_signed_type(__typeof__(_range_end)),                     \
 273                         .value = lttng_is_signed_type(__typeof__(_range_end)) ?                         \
 274                                 (long long) (_range_end) : (_range_end),                                \
 275                 },                                                                                      \
 276                 .string = (_string),                                                                    \
 277         }),
 278
 279 #define lttng_kernel_static_enum_entry_auto(_string)                                                    \
 280         __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, {                                \
 281                 .start = {                                                                              \
 282                         .signedness = -1,                                                               \
 283                         .value = -1,                                                                    \
 284                 },                                                                                      \
 285                 .end = {                                                                                \
 286                         .signedness = -1,                                                               \
 287                         .value = -1,                                                                    \
 288                 },                                                                                      \
 289                 .string = (_string),                                                                    \
 290                 .options = {                                                                            \
 291                         .is_auto = 1,                                                                   \
 292                 }                                                                                       \
 293         }),
 294
 295 struct lttng_kernel_probe_ctx {
 296         struct lttng_kernel_event_common *event;
 297         uint8_t interruptible;
 298 };
 299
 300 struct lttng_kernel_event_desc {
 301         const char *event_name;         /* lttng-modules name */
 302         const char *event_kname;        /* Linux kernel name (tracepoints) */
 303         const struct lttng_kernel_probe_desc *probe_desc;
 304         void (*probe_callback)(void);
 305         const struct lttng_kernel_event_field **fields; /* event payload */
 306         unsigned int nr_fields;
 307         struct module *owner;
 308 };
 309
 310 struct lttng_kernel_probe_desc {
 311         const char *provider_name;
 312         const struct lttng_kernel_event_desc **event_desc;
 313         unsigned int nr_events;
 314         struct list_head head;                  /* chain registered probes */
 315         struct list_head lazy_init_head;
 316         int lazy;                               /* lazy registration */
 317 };
 318
 319 struct lttng_krp;                               /* Kretprobe handling */
 320
 321 /*
 322  * Objects in a linked-list of enablers, owned by an event.
 323  */
 324 struct lttng_enabler_ref {
 325         struct list_head node;                  /* enabler ref list */
 326         struct lttng_enabler *ref;              /* backward ref */
 327 };
 328
 329 struct lttng_uprobe_handler {
 330         struct lttng_kernel_event_common *event;
 331         loff_t offset;
 332         struct uprobe_consumer up_consumer;
 333         struct list_head node;
 334 };
 335
 336 struct lttng_kprobe {
 337         struct kprobe kp;
 338         char *symbol_name;
 339 };
 340
 341 struct lttng_uprobe {
 342         struct inode *inode;
 343         struct list_head head;
 344 };
 345
 346 enum lttng_syscall_entryexit {
 347         LTTNG_SYSCALL_ENTRY,
 348         LTTNG_SYSCALL_EXIT,
 349 };
 350
 351 enum lttng_syscall_abi {
 352         LTTNG_SYSCALL_ABI_NATIVE,
 353         LTTNG_SYSCALL_ABI_COMPAT,
 354 };
 355
 356 /*
 357  * Result of the run_filter() callback.
 358  */
 359 enum lttng_kernel_event_filter_result {
 360         LTTNG_KERNEL_EVENT_FILTER_ACCEPT = 0,
 361         LTTNG_KERNEL_EVENT_FILTER_REJECT = 1,
 362 };
 363
 364 struct lttng_kernel_event_common_private;
 365
 366 enum lttng_kernel_event_type {
 367         LTTNG_KERNEL_EVENT_TYPE_RECORDER = 0,
 368         LTTNG_KERNEL_EVENT_TYPE_NOTIFIER = 1,
 369 };
 370
 371 struct lttng_kernel_event_common {
 372         struct lttng_kernel_event_common_private *priv; /* Private event interface */
 373
 374         enum lttng_kernel_event_type type;
 375         /* Get child with container_of(). */
 376
 377         int enabled;
 378         int eval_filter;                                /* Need to evaluate filters */
 379         int (*run_filter)(const struct lttng_kernel_event_common *event,
 380                 const char *stack_data,
 381                 struct lttng_kernel_probe_ctx *probe_ctx,
 382                 void *filter_ctx);
 383 };
 384
 385 struct lttng_kernel_event_recorder_private;
 386
 387 struct lttng_kernel_event_recorder {
 388         struct lttng_kernel_event_common parent;
 389         struct lttng_kernel_event_recorder_private *priv;       /* Private event record interface */
 390
 391         struct lttng_channel *chan;
 392 };
 393
 394 struct lttng_kernel_notification_ctx {
 395         int eval_capture;                                       /* Capture evaluation available. */
 396 };
 397
 398 struct lttng_kernel_event_notifier_private;
 399
 400 struct lttng_kernel_event_notifier {
 401         struct lttng_kernel_event_common parent;
 402         struct lttng_kernel_event_notifier_private *priv;       /* Private event notifier interface */
 403
 404         int eval_capture;                               /* Need to evaluate capture */
 405         void (*notification_send)(struct lttng_kernel_event_notifier *event_notifier,
 406                 const char *stack_data,
 407                 struct lttng_kernel_probe_ctx *probe_ctx,
 408                 struct lttng_kernel_notification_ctx *notif_ctx);
 409 };
 410
 411 enum lttng_enabler_format_type {
 412         LTTNG_ENABLER_FORMAT_STAR_GLOB,
 413         LTTNG_ENABLER_FORMAT_NAME,
 414 };
 415
 416 struct lttng_channel_ops {
 417         struct channel *(*channel_create)(const char *name,
 418                                 void *priv,
 419                                 void *buf_addr,
 420                                 size_t subbuf_size, size_t num_subbuf,
 421                                 unsigned int switch_timer_interval,
 422                                 unsigned int read_timer_interval);
 423         void (*channel_destroy)(struct channel *chan);
 424         struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
 425         int (*buffer_has_read_closed_stream)(struct channel *chan);
 426         void (*buffer_read_close)(struct lib_ring_buffer *buf);
 427         int (*event_reserve)(struct lib_ring_buffer_ctx *ctx);
 428         void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
 429         void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
 430                             size_t len);
 431         void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx,
 432                                       const void *src, size_t len);
 433         void (*event_memset)(struct lib_ring_buffer_ctx *ctx,
 434                              int c, size_t len);
 435         void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src,
 436                              size_t len);
 437         void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx,
 438                                        const char __user *src, size_t len);
 439         /*
 440          * packet_avail_size returns the available size in the current
 441          * packet. Note that the size returned is only a hint, since it
 442          * may change due to concurrent writes.
 443          */
 444         size_t (*packet_avail_size)(struct channel *chan);
 445         wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu);
 446         wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan);
 447         int (*is_finalized)(struct channel *chan);
 448         int (*is_disabled)(struct channel *chan);
 449         int (*timestamp_begin) (const struct lib_ring_buffer_config *config,
 450                         struct lib_ring_buffer *bufb,
 451                         uint64_t *timestamp_begin);
 452         int (*timestamp_end) (const struct lib_ring_buffer_config *config,
 453                         struct lib_ring_buffer *bufb,
 454                         uint64_t *timestamp_end);
 455         int (*events_discarded) (const struct lib_ring_buffer_config *config,
 456                         struct lib_ring_buffer *bufb,
 457                         uint64_t *events_discarded);
 458         int (*content_size) (const struct lib_ring_buffer_config *config,
 459                         struct lib_ring_buffer *bufb,
 460                         uint64_t *content_size);
 461         int (*packet_size) (const struct lib_ring_buffer_config *config,
 462                         struct lib_ring_buffer *bufb,
 463                         uint64_t *packet_size);
 464         int (*stream_id) (const struct lib_ring_buffer_config *config,
 465                         struct lib_ring_buffer *bufb,
 466                         uint64_t *stream_id);
 467         int (*current_timestamp) (const struct lib_ring_buffer_config *config,
 468                         struct lib_ring_buffer *bufb,
 469                         uint64_t *ts);
 470         int (*sequence_number) (const struct lib_ring_buffer_config *config,
 471                         struct lib_ring_buffer *bufb,
 472                         uint64_t *seq);
 473         int (*instance_id) (const struct lib_ring_buffer_config *config,
 474                         struct lib_ring_buffer *bufb,
 475                         uint64_t *id);
 476 };
 477
 478 struct lttng_counter_ops {
 479         struct lib_counter *(*counter_create)(size_t nr_dimensions,
 480                         const size_t *max_nr_elem,      /* for each dimension */
 481                         int64_t global_sum_step);
 482         void (*counter_destroy)(struct lib_counter *counter);
 483         int (*counter_add)(struct lib_counter *counter, const size_t *dimension_indexes,
 484                         int64_t v);
 485         /*
 486          * counter_read reads a specific cpu's counter if @cpu >= 0, or
 487          * the global aggregation counter if @cpu == -1.
 488          */
 489         int (*counter_read)(struct lib_counter *counter, const size_t *dimension_indexes, int cpu,
 490                          int64_t *value, bool *overflow, bool *underflow);
 491         /*
 492          * counter_aggregate returns the total sum of all per-cpu counters and
 493          * the global aggregation counter.
 494          */
 495         int (*counter_aggregate)(struct lib_counter *counter, const size_t *dimension_indexes,
 496                         int64_t *value, bool *overflow, bool *underflow);
 497         int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes);
 498 };
 499
 500 struct lttng_transport {
 501         char *name;
 502         struct module *owner;
 503         struct list_head node;
 504         struct lttng_channel_ops ops;
 505 };
 506
 507 struct lttng_counter_transport {
 508         char *name;
 509         struct module *owner;
 510         struct list_head node;
 511         struct lttng_counter_ops ops;
 512 };
 513
 514 struct lttng_syscall_filter;
 515
 516 #define LTTNG_EVENT_HT_BITS             12
 517 #define LTTNG_EVENT_HT_SIZE             (1U << LTTNG_EVENT_HT_BITS)
 518
 519 struct lttng_event_ht {
 520         struct hlist_head table[LTTNG_EVENT_HT_SIZE];
 521 };
 522
 523 #define LTTNG_EVENT_NOTIFIER_HT_BITS            12
 524 #define LTTNG_EVENT_NOTIFIER_HT_SIZE            (1U << LTTNG_EVENT_NOTIFIER_HT_BITS)
 525
 526 struct lttng_event_notifier_ht {
 527         struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE];
 528 };
 529
 530 struct lttng_channel {
 531         unsigned int id;
 532         struct channel *chan;           /* Channel buffers */
 533         int enabled;
 534         struct lttng_kernel_ctx *ctx;
 535         /* Event ID management */
 536         struct lttng_session *session;
 537         struct file *file;              /* File associated to channel */
 538         unsigned int free_event_id;     /* Next event ID to allocate */
 539         struct list_head list;          /* Channel list */
 540         struct lttng_channel_ops *ops;
 541         struct lttng_transport *transport;
 542         struct hlist_head *sc_table;    /* for syscall tracing */
 543         struct hlist_head *compat_sc_table;
 544         struct hlist_head *sc_exit_table;       /* for syscall exit tracing */
 545         struct hlist_head *compat_sc_exit_table;
 546         struct hlist_head sc_unknown;   /* for unknown syscalls */
 547         struct hlist_head sc_compat_unknown;
 548         struct hlist_head sc_exit_unknown;
 549         struct hlist_head compat_sc_exit_unknown;
 550         struct lttng_syscall_filter *sc_filter;
 551         int header_type;                /* 0: unset, 1: compact, 2: large */
 552         enum channel_type channel_type;
 553         int syscall_all_entry;
 554         int syscall_all_exit;
 555         unsigned int metadata_dumped:1,
 556                 sys_enter_registered:1,
 557                 sys_exit_registered:1,
 558                 tstate:1;               /* Transient enable state */
 559 };
 560
 561 struct lttng_metadata_stream {
 562         void *priv;                     /* Ring buffer private data */
 563         struct lttng_metadata_cache *metadata_cache;
 564         unsigned int metadata_in;       /* Bytes read from the cache */
 565         unsigned int metadata_out;      /* Bytes consumed from stream */
 566         int finalized;                  /* Has channel been finalized */
 567         wait_queue_head_t read_wait;    /* Reader buffer-level wait queue */
 568         struct list_head list;          /* Stream list */
 569         struct lttng_transport *transport;
 570         uint64_t version;               /* Current version of the metadata cache */
 571         bool coherent;                  /* Stream in a coherent state */
 572 };
 573
 574 #define LTTNG_DYNAMIC_LEN_STACK_SIZE    128
 575
 576 struct lttng_dynamic_len_stack {
 577         size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE];
 578         size_t offset;
 579 };
 580
 581 DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack);
 582
 583 /*
 584  * struct lttng_id_tracker declared in header due to deferencing of *v
 585  * in RCU_INITIALIZER(v).
 586  */
 587 #define LTTNG_ID_HASH_BITS      6
 588 #define LTTNG_ID_TABLE_SIZE     (1 << LTTNG_ID_HASH_BITS)
 589
 590 enum tracker_type {
 591         TRACKER_PID,
 592         TRACKER_VPID,
 593         TRACKER_UID,
 594         TRACKER_VUID,
 595         TRACKER_GID,
 596         TRACKER_VGID,
 597
 598         TRACKER_UNKNOWN,
 599 };
 600
 601 struct lttng_id_tracker_rcu {
 602         struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE];
 603 };
 604
 605 struct lttng_id_tracker {
 606         struct lttng_session *session;
 607         enum tracker_type tracker_type;
 608         struct lttng_id_tracker_rcu *p; /* RCU dereferenced. */
 609 };
 610
 611 struct lttng_id_hash_node {
 612         struct hlist_node hlist;
 613         int id;
 614 };
 615
 616 struct lttng_session {
 617         int active;                     /* Is trace session active ? */
 618         int been_active;                /* Has trace session been active ? */
 619         struct file *file;              /* File associated to session */
 620         struct list_head chan;          /* Channel list head */
 621         struct list_head events;        /* Event list head */
 622         struct list_head list;          /* Session list */
 623         unsigned int free_chan_id;      /* Next chan ID to allocate */
 624         uuid_le uuid;                   /* Trace session unique ID */
 625         struct lttng_metadata_cache *metadata_cache;
 626         struct lttng_id_tracker pid_tracker;
 627         struct lttng_id_tracker vpid_tracker;
 628         struct lttng_id_tracker uid_tracker;
 629         struct lttng_id_tracker vuid_tracker;
 630         struct lttng_id_tracker gid_tracker;
 631         struct lttng_id_tracker vgid_tracker;
 632         unsigned int metadata_dumped:1,
 633                 tstate:1;               /* Transient enable state */
 634         /* List of event enablers */
 635         struct list_head enablers_head;
 636         /* Hash table of events */
 637         struct lttng_event_ht events_ht;
 638         char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
 639         char creation_time[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
 640 };
 641
 642 struct lttng_counter {
 643         struct file *file;              /* File associated to counter. */
 644         struct file *owner;
 645         struct lttng_counter_transport *transport;
 646         struct lib_counter *counter;
 647         struct lttng_counter_ops *ops;
 648 };
 649
 650 struct lttng_event_notifier_group {
 651         struct file *file;              /* File associated to event notifier group */
 652         struct file *notif_file;        /* File used to expose notifications to userspace. */
 653         struct list_head node;          /* event notifier group list */
 654         struct list_head enablers_head; /* List of enablers */
 655         struct list_head event_notifiers_head; /* List of event notifier */
 656         struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */
 657         struct lttng_channel_ops *ops;
 658         struct lttng_transport *transport;
 659         struct channel *chan;           /* Ring buffer channel for event notifier group. */
 660         struct lib_ring_buffer *buf;    /* Ring buffer for event notifier group. */
 661         wait_queue_head_t read_wait;
 662         struct irq_work wakeup_pending; /* Pending wakeup irq work. */
 663         struct lttng_kernel_event_notifier *sc_unknown; /* for unknown syscalls */
 664         struct lttng_kernel_event_notifier *sc_compat_unknown;
 665
 666         struct lttng_syscall_filter *sc_filter;
 667
 668         struct hlist_head *event_notifier_syscall_dispatch;
 669         struct hlist_head *event_notifier_compat_syscall_dispatch;
 670         struct hlist_head *event_notifier_exit_syscall_dispatch;
 671         struct hlist_head *event_notifier_exit_compat_syscall_dispatch;
 672
 673         struct hlist_head event_notifier_unknown_syscall_dispatch;
 674         struct hlist_head event_notifier_compat_unknown_syscall_dispatch;
 675         struct hlist_head event_notifier_exit_unknown_syscall_dispatch;
 676         struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch;
 677
 678         int syscall_all_entry;
 679         int syscall_all_exit;
 680
 681         unsigned int sys_enter_registered:1, sys_exit_registered:1;
 682
 683         struct lttng_counter *error_counter;
 684         size_t error_counter_len;
 685 };
 686
 687 struct lttng_metadata_cache {
 688         char *data;                     /* Metadata cache */
 689         unsigned int cache_alloc;       /* Metadata allocated size (bytes) */
 690         unsigned int metadata_written;  /* Number of bytes written in metadata cache */
 691         atomic_t producing;             /* Metadata being produced (incomplete) */
 692         struct kref refcount;           /* Metadata cache usage */
 693         struct list_head metadata_stream;       /* Metadata stream list */
 694         uuid_le uuid;                   /* Trace session unique ID (copy) */
 695         struct mutex lock;              /* Produce/consume lock */
 696         uint64_t version;               /* Current version of the metadata */
 697 };
 698
 699 void lttng_lock_sessions(void);
 700 void lttng_unlock_sessions(void);
 701
 702 struct list_head *lttng_get_probe_list_head(void);
 703
 704 struct lttng_event_enabler *lttng_event_enabler_create(
 705                 enum lttng_enabler_format_type format_type,
 706                 struct lttng_kernel_abi_event *event_param,
 707                 struct lttng_channel *chan);
 708
 709 int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler);
 710 int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler);
 711 struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create(
 712                 struct lttng_event_notifier_group *event_notifier_group,
 713                 enum lttng_enabler_format_type format_type,
 714                 struct lttng_kernel_abi_event_notifier *event_notifier_param);
 715
 716 int lttng_event_notifier_enabler_enable(
 717                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 718 int lttng_event_notifier_enabler_disable(
 719                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 720 int lttng_fix_pending_events(void);
 721 int lttng_fix_pending_event_notifiers(void);
 722 int lttng_session_active(void);
 723 bool lttng_event_notifier_active(void);
 724
 725 struct lttng_session *lttng_session_create(void);
 726 int lttng_session_enable(struct lttng_session *session);
 727 int lttng_session_disable(struct lttng_session *session);
 728 void lttng_session_destroy(struct lttng_session *session);
 729 int lttng_session_metadata_regenerate(struct lttng_session *session);
 730 int lttng_session_statedump(struct lttng_session *session);
 731 void metadata_cache_destroy(struct kref *kref);
 732
 733 struct lttng_counter *lttng_kernel_counter_create(
 734                 const char *counter_transport_name, size_t number_dimensions,
 735                 const size_t *dimensions_sizes);
 736 int lttng_kernel_counter_read(struct lttng_counter *counter,
 737                 const size_t *dimension_indexes, int32_t cpu,
 738                 int64_t *val, bool *overflow, bool *underflow);
 739 int lttng_kernel_counter_aggregate(struct lttng_counter *counter,
 740                 const size_t *dimension_indexes, int64_t *val,
 741                 bool *overflow, bool *underflow);
 742 int lttng_kernel_counter_clear(struct lttng_counter *counter,
 743                 const size_t *dimension_indexes);
 744
 745
 746 struct lttng_event_notifier_group *lttng_event_notifier_group_create(void);
 747 int lttng_event_notifier_group_create_error_counter(
 748                 struct file *event_notifier_group_file,
 749                 const struct lttng_kernel_abi_counter_conf *error_counter_conf);
 750 void lttng_event_notifier_group_destroy(
 751                 struct lttng_event_notifier_group *event_notifier_group);
 752
 753 struct lttng_channel *lttng_channel_create(struct lttng_session *session,
 754                                        const char *transport_name,
 755                                        void *buf_addr,
 756                                        size_t subbuf_size, size_t num_subbuf,
 757                                        unsigned int switch_timer_interval,
 758                                        unsigned int read_timer_interval,
 759                                        enum channel_type channel_type);
 760 struct lttng_channel *lttng_global_channel_create(struct lttng_session *session,
 761                                        int overwrite, void *buf_addr,
 762                                        size_t subbuf_size, size_t num_subbuf,
 763                                        unsigned int switch_timer_interval,
 764                                        unsigned int read_timer_interval);
 765
 766 void lttng_metadata_channel_destroy(struct lttng_channel *chan);
 767 struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_channel *chan,
 768                                 struct lttng_kernel_abi_event *event_param,
 769                                 const struct lttng_kernel_event_desc *event_desc,
 770                                 enum lttng_kernel_abi_instrumentation itype);
 771 struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_channel *chan,
 772                                 struct lttng_kernel_abi_event *event_param,
 773                                 const struct lttng_kernel_event_desc *event_desc,
 774                                 enum lttng_kernel_abi_instrumentation itype);
 775 struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_channel *chan,
 776                 struct lttng_kernel_abi_old_event *old_event_param,
 777                 const struct lttng_kernel_event_desc *internal_desc);
 778
 779 struct lttng_kernel_event_notifier *lttng_event_notifier_create(
 780                                 const struct lttng_kernel_event_desc *event_notifier_desc,
 781                                 uint64_t id,
 782                                 uint64_t error_counter_idx,
 783                                 struct lttng_event_notifier_group *event_notifier_group,
 784                                 struct lttng_kernel_abi_event_notifier *event_notifier_param,
 785                                 enum lttng_kernel_abi_instrumentation itype);
 786 struct lttng_kernel_event_notifier *_lttng_event_notifier_create(
 787                                 const struct lttng_kernel_event_desc *event_notifier_desc,
 788                                 uint64_t id,
 789                                 uint64_t error_counter_idx,
 790                                 struct lttng_event_notifier_group *event_notifier_group,
 791                                 struct lttng_kernel_abi_event_notifier *event_notifier_param,
 792                                 enum lttng_kernel_abi_instrumentation itype);
 793
 794 int lttng_channel_enable(struct lttng_channel *channel);
 795 int lttng_channel_disable(struct lttng_channel *channel);
 796 int lttng_event_enable(struct lttng_kernel_event_common *event);
 797 int lttng_event_disable(struct lttng_kernel_event_common *event);
 798
 799 void lttng_transport_register(struct lttng_transport *transport);
 800 void lttng_transport_unregister(struct lttng_transport *transport);
 801
 802 void lttng_counter_transport_register(struct lttng_counter_transport *transport);
 803 void lttng_counter_transport_unregister(struct lttng_counter_transport *transport);
 804
 805 void synchronize_trace(void);
 806 int lttng_abi_init(void);
 807 int lttng_abi_compat_old_init(void);
 808 void lttng_abi_exit(void);
 809 void lttng_abi_compat_old_exit(void);
 810
 811 int lttng_probe_register(struct lttng_kernel_probe_desc *desc);
 812 void lttng_probe_unregister(struct lttng_kernel_probe_desc *desc);
 813 const struct lttng_kernel_event_desc *lttng_event_desc_get(const char *name);
 814 void lttng_event_desc_put(const struct lttng_kernel_event_desc *desc);
 815 int lttng_probes_init(void);
 816 void lttng_probes_exit(void);
 817
 818 int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
 819                 struct channel *chan, bool *coherent);
 820
 821 int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node);
 822 int lttng_id_tracker_empty_set(struct lttng_id_tracker *lf);
 823 void lttng_id_tracker_destroy(struct lttng_id_tracker *lf, bool rcu);
 824 bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id);
 825 int lttng_id_tracker_add(struct lttng_id_tracker *lf, int id);
 826 int lttng_id_tracker_del(struct lttng_id_tracker *lf, int id);
 827
 828 int lttng_session_track_id(struct lttng_session *session,
 829                 enum tracker_type tracker_type, int id);
 830 int lttng_session_untrack_id(struct lttng_session *session,
 831                 enum tracker_type tracker_type, int id);
 832
 833 int lttng_session_list_tracker_ids(struct lttng_session *session,
 834                 enum tracker_type tracker_type);
 835
 836 void lttng_clock_ref(void);
 837 void lttng_clock_unref(void);
 838
 839 int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc,
 840                 struct lttng_enabler *enabler);
 841
 842 #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
 843 int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler);
 844 int lttng_syscalls_unregister_channel(struct lttng_channel *chan);
 845 int lttng_syscalls_destroy_event(struct lttng_channel *chan);
 846 int lttng_syscall_filter_enable_event(
 847                 struct lttng_channel *chan,
 848                 struct lttng_kernel_event_recorder *event);
 849 int lttng_syscall_filter_disable_event(
 850                 struct lttng_channel *chan,
 851                 struct lttng_kernel_event_recorder *event);
 852
 853 long lttng_channel_syscall_mask(struct lttng_channel *channel,
 854                 struct lttng_kernel_abi_syscall_mask __user *usyscall_mask);
 855
 856 int lttng_syscalls_register_event_notifier(
 857                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 858 int lttng_syscalls_create_matching_event_notifiers(
 859                 struct lttng_event_notifier_enabler *event_notifier_enabler);
 860 int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group);
 861 int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 862 int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 863 #else
 864 static inline int lttng_syscalls_register_event(
 865                 struct lttng_event_enabler *event_enabler)
 866 {
 867         return -ENOSYS;
 868 }
 869
 870 static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan)
 871 {
 872         return 0;
 873 }
 874
 875 static inline int lttng_syscalls_destroy(struct lttng_channel *chan)
 876 {
 877         return 0;
 878 }
 879
 880 static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan,
 881                 struct lttng_kernel_event_recorder *event);
 882 {
 883         return -ENOSYS;
 884 }
 885
 886 static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan,
 887                 struct lttng_kernel_event_recorder *event);
 888 {
 889         return -ENOSYS;
 890 }
 891
 892 static inline long lttng_channel_syscall_mask(struct lttng_channel *channel,
 893                 struct lttng_kernel_syscall_mask __user *usyscall_mask)
 894 {
 895         return -ENOSYS;
 896 }
 897
 898 static inline int lttng_syscalls_register_event_notifier(
 899                 struct lttng_event_notifier_group *group)
 900 {
 901         return -ENOSYS;
 902 }
 903
 904 static inline int lttng_syscalls_unregister_event_notifier_group(
 905                 struct lttng_event_notifier_group *group)
 906 {
 907         return 0;
 908 }
 909
 910 static inline int lttng_syscall_filter_enable_event_notifier(
 911                 struct lttng_event_notifier_group *group,
 912                 const char *name)
 913 {
 914         return -ENOSYS;
 915 }
 916
 917 static inline int lttng_syscall_filter_disable_event_notifier(
 918                 struct lttng_event_notifier_group *group,
 919                 const char *name)
 920 {
 921         return -ENOSYS;
 922 }
 923
 924 #endif
 925
 926 int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler,
 927                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 928 int lttng_event_notifier_enabler_attach_filter_bytecode(
 929                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 930                 struct lttng_kernel_abi_filter_bytecode __user *bytecode);
 931 int lttng_event_notifier_enabler_attach_capture_bytecode(
 932                 struct lttng_event_notifier_enabler *event_notifier_enabler,
 933                 struct lttng_kernel_abi_capture_bytecode __user *bytecode);
 934
 935 void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc,
 936                 struct lttng_kernel_ctx *ctx,
 937                 struct list_head *instance_bytecode_runtime_head,
 938                 struct list_head *enabler_bytecode_runtime_head);
 939 void lttng_free_event_filter_runtime(struct lttng_kernel_event_common *event);
 940
 941 int lttng_probes_init(void);
 942
 943 int lttng_logger_init(void);
 944 void lttng_logger_exit(void);
 945
 946 extern int lttng_statedump_start(struct lttng_session *session);
 947
 948 #ifdef CONFIG_KPROBES
 949 int lttng_kprobes_register_event(const char *name,
 950                 const char *symbol_name,
 951                 uint64_t offset,
 952                 uint64_t addr,
 953                 struct lttng_kernel_event_recorder *event);
 954 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event);
 955 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
 956 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 957                 uint64_t offset,
 958                 uint64_t addr,
 959                 struct lttng_kernel_event_notifier *event_notifier);
 960 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
 961 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
 962 #else
 963 static inline
 964 int lttng_kprobes_register_event(const char *name,
 965                 const char *symbol_name,
 966                 uint64_t offset,
 967                 uint64_t addr,
 968                 struct lttng_kernel_event_recorder *event)
 969 {
 970         return -ENOSYS;
 971 }
 972
 973 static inline
 974 void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event)
 975 {
 976 }
 977
 978 static inline
 979 void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
 980 {
 981 }
 982
 983 static inline
 984 int lttng_kprobes_register_event_notifier(const char *symbol_name,
 985                 uint64_t offset,
 986                 uint64_t addr,
 987                 struct lttng_kernel_event_notifier *event_notifier)
 988 {
 989         return -ENOSYS;
 990 }
 991
 992 static inline
 993 void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
 994 {
 995 }
 996
 997 static inline
 998 void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
 999 {
1000 }
1001 #endif
1002
1003 int lttng_event_add_callsite(struct lttng_kernel_event_common *event,
1004         struct lttng_kernel_abi_event_callsite __user *callsite);
1005
1006 #ifdef CONFIG_UPROBES
1007 int lttng_uprobes_register_event(const char *name,
1008         int fd, struct lttng_kernel_event_recorder *event);
1009 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
1010         struct lttng_kernel_abi_event_callsite __user *callsite);
1011 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event);
1012 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event);
1013 int lttng_uprobes_register_event_notifier(const char *name,
1014         int fd, struct lttng_kernel_event_notifier *event_notifier);
1015 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier);
1016 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier);
1017 #else
1018 static inline
1019 int lttng_uprobes_register_event(const char *name,
1020         int fd, struct lttng_kernel_event_recorder *event)
1021 {
1022         return -ENOSYS;
1023 }
1024
1025 static inline
1026 int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event,
1027         struct lttng_kernel_abi_event_callsite __user *callsite)
1028 {
1029         return -ENOSYS;
1030 }
1031
1032 static inline
1033 void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event)
1034 {
1035 }
1036
1037 static inline
1038 void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event)
1039 {
1040 }
1041
1042 static inline
1043 int lttng_uprobes_register_event_notifier(const char *name,
1044         int fd, struct lttng_kernel_event_notifier *event_notifier)
1045 {
1046         return -ENOSYS;
1047 }
1048
1049 static inline
1050 void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier)
1051 {
1052 }
1053
1054 static inline
1055 void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier)
1056 {
1057 }
1058 #endif
1059
1060 #ifdef CONFIG_KRETPROBES
1061 int lttng_kretprobes_register(const char *name,
1062                 const char *symbol_name,
1063                 uint64_t offset,
1064                 uint64_t addr,
1065                 struct lttng_kernel_event_recorder *event_entry,
1066                 struct lttng_kernel_event_recorder *event_exit);
1067 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event);
1068 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event);
1069 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
1070         int enable);
1071 #else
1072 static inline
1073 int lttng_kretprobes_register(const char *name,
1074                 const char *symbol_name,
1075                 uint64_t offset,
1076                 uint64_t addr,
1077                 struct lttng_kernel_event_recorder *event_entry,
1078                 struct lttng_kernel_event_recorder *event_exit)
1079 {
1080         return -ENOSYS;
1081 }
1082
1083 static inline
1084 void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event)
1085 {
1086 }
1087
1088 static inline
1089 void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event)
1090 {
1091 }
1092
1093 static inline
1094 int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event,
1095         int enable)
1096 {
1097         return -ENOSYS;
1098 }
1099 #endif
1100
1101 int lttng_calibrate(struct lttng_kernel_abi_calibrate *calibrate);
1102
1103 extern const struct file_operations lttng_tracepoint_list_fops;
1104 extern const struct file_operations lttng_syscall_list_fops;
1105
1106 #define TRACEPOINT_HAS_DATA_ARG
1107
1108 #endif /* _LTTNG_EVENTS_H */