| 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_kernel_session; |
| 30 | struct lttng_metadata_cache; |
| 31 | struct lttng_kernel_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 | /* |
| 320 | * Result of the run_filter() callback. |
| 321 | */ |
| 322 | enum lttng_kernel_event_filter_result { |
| 323 | LTTNG_KERNEL_EVENT_FILTER_ACCEPT = 0, |
| 324 | LTTNG_KERNEL_EVENT_FILTER_REJECT = 1, |
| 325 | }; |
| 326 | |
| 327 | struct lttng_kernel_event_common_private; |
| 328 | |
| 329 | enum lttng_kernel_event_type { |
| 330 | LTTNG_KERNEL_EVENT_TYPE_RECORDER = 0, |
| 331 | LTTNG_KERNEL_EVENT_TYPE_NOTIFIER = 1, |
| 332 | }; |
| 333 | |
| 334 | struct lttng_kernel_event_common { |
| 335 | struct lttng_kernel_event_common_private *priv; /* Private event interface */ |
| 336 | |
| 337 | enum lttng_kernel_event_type type; |
| 338 | /* Get child with container_of(). */ |
| 339 | |
| 340 | int enabled; |
| 341 | int eval_filter; /* Need to evaluate filters */ |
| 342 | int (*run_filter)(const struct lttng_kernel_event_common *event, |
| 343 | const char *stack_data, |
| 344 | struct lttng_kernel_probe_ctx *probe_ctx, |
| 345 | void *filter_ctx); |
| 346 | }; |
| 347 | |
| 348 | struct lttng_kernel_event_recorder_private; |
| 349 | |
| 350 | struct lttng_kernel_event_recorder { |
| 351 | struct lttng_kernel_event_common parent; |
| 352 | struct lttng_kernel_event_recorder_private *priv; /* Private event record interface */ |
| 353 | |
| 354 | struct lttng_channel *chan; |
| 355 | }; |
| 356 | |
| 357 | struct lttng_kernel_notification_ctx { |
| 358 | int eval_capture; /* Capture evaluation available. */ |
| 359 | }; |
| 360 | |
| 361 | struct lttng_kernel_event_notifier_private; |
| 362 | |
| 363 | struct lttng_kernel_event_notifier { |
| 364 | struct lttng_kernel_event_common parent; |
| 365 | struct lttng_kernel_event_notifier_private *priv; /* Private event notifier interface */ |
| 366 | |
| 367 | int eval_capture; /* Need to evaluate capture */ |
| 368 | void (*notification_send)(struct lttng_kernel_event_notifier *event_notifier, |
| 369 | const char *stack_data, |
| 370 | struct lttng_kernel_probe_ctx *probe_ctx, |
| 371 | struct lttng_kernel_notification_ctx *notif_ctx); |
| 372 | }; |
| 373 | |
| 374 | struct lttng_kernel_channel_buffer_ops { |
| 375 | struct lttng_kernel_channel_buffer_ops_private *priv; /* Private channel buffer ops interface. */ |
| 376 | |
| 377 | int (*event_reserve)(struct lttng_kernel_ring_buffer_ctx *ctx); |
| 378 | void (*event_commit)(struct lttng_kernel_ring_buffer_ctx *ctx); |
| 379 | void (*event_write)(struct lttng_kernel_ring_buffer_ctx *ctx, const void *src, |
| 380 | size_t len); |
| 381 | void (*event_write_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx, |
| 382 | const void *src, size_t len); |
| 383 | void (*event_memset)(struct lttng_kernel_ring_buffer_ctx *ctx, |
| 384 | int c, size_t len); |
| 385 | void (*event_strcpy)(struct lttng_kernel_ring_buffer_ctx *ctx, const char *src, |
| 386 | size_t len); |
| 387 | void (*event_strcpy_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx, |
| 388 | const char __user *src, size_t len); |
| 389 | }; |
| 390 | |
| 391 | struct lttng_syscall_filter; |
| 392 | |
| 393 | #define LTTNG_EVENT_HT_BITS 12 |
| 394 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) |
| 395 | |
| 396 | struct lttng_event_ht { |
| 397 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; |
| 398 | }; |
| 399 | |
| 400 | #define LTTNG_EVENT_NOTIFIER_HT_BITS 12 |
| 401 | #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS) |
| 402 | |
| 403 | struct lttng_event_notifier_ht { |
| 404 | struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE]; |
| 405 | }; |
| 406 | |
| 407 | struct lttng_channel { |
| 408 | unsigned int id; |
| 409 | struct channel *chan; /* Channel buffers */ |
| 410 | int enabled; |
| 411 | struct lttng_kernel_ctx *ctx; |
| 412 | /* Event ID management */ |
| 413 | struct lttng_kernel_session *session; |
| 414 | struct file *file; /* File associated to channel */ |
| 415 | unsigned int free_event_id; /* Next event ID to allocate */ |
| 416 | struct list_head list; /* Channel list */ |
| 417 | struct lttng_kernel_channel_buffer_ops *ops; |
| 418 | struct lttng_transport *transport; |
| 419 | struct hlist_head *sc_table; /* for syscall tracing */ |
| 420 | struct hlist_head *compat_sc_table; |
| 421 | struct hlist_head *sc_exit_table; /* for syscall exit tracing */ |
| 422 | struct hlist_head *compat_sc_exit_table; |
| 423 | struct hlist_head sc_unknown; /* for unknown syscalls */ |
| 424 | struct hlist_head sc_compat_unknown; |
| 425 | struct hlist_head sc_exit_unknown; |
| 426 | struct hlist_head compat_sc_exit_unknown; |
| 427 | struct lttng_syscall_filter *sc_filter; |
| 428 | int header_type; /* 0: unset, 1: compact, 2: large */ |
| 429 | enum channel_type channel_type; |
| 430 | int syscall_all_entry; |
| 431 | int syscall_all_exit; |
| 432 | unsigned int metadata_dumped:1, |
| 433 | sys_enter_registered:1, |
| 434 | sys_exit_registered:1, |
| 435 | tstate:1; /* Transient enable state */ |
| 436 | }; |
| 437 | |
| 438 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
| 439 | |
| 440 | struct lttng_dynamic_len_stack { |
| 441 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; |
| 442 | size_t offset; |
| 443 | }; |
| 444 | |
| 445 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); |
| 446 | |
| 447 | /* |
| 448 | * struct lttng_id_tracker declared in header due to deferencing of *v |
| 449 | * in RCU_INITIALIZER(v). |
| 450 | */ |
| 451 | #define LTTNG_ID_HASH_BITS 6 |
| 452 | #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS) |
| 453 | |
| 454 | enum tracker_type { |
| 455 | TRACKER_PID, |
| 456 | TRACKER_VPID, |
| 457 | TRACKER_UID, |
| 458 | TRACKER_VUID, |
| 459 | TRACKER_GID, |
| 460 | TRACKER_VGID, |
| 461 | |
| 462 | TRACKER_UNKNOWN, |
| 463 | }; |
| 464 | |
| 465 | struct lttng_id_tracker_rcu { |
| 466 | struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE]; |
| 467 | }; |
| 468 | |
| 469 | struct lttng_id_tracker { |
| 470 | struct lttng_kernel_session *session; |
| 471 | enum tracker_type tracker_type; |
| 472 | struct lttng_id_tracker_rcu *p; /* RCU dereferenced. */ |
| 473 | }; |
| 474 | |
| 475 | struct lttng_kernel_session_private; |
| 476 | |
| 477 | struct lttng_kernel_session { |
| 478 | struct lttng_kernel_session_private *priv; /* Private session interface */ |
| 479 | |
| 480 | int active; /* Is trace session active ? */ |
| 481 | |
| 482 | struct lttng_id_tracker pid_tracker; |
| 483 | struct lttng_id_tracker vpid_tracker; |
| 484 | struct lttng_id_tracker uid_tracker; |
| 485 | struct lttng_id_tracker vuid_tracker; |
| 486 | struct lttng_id_tracker gid_tracker; |
| 487 | struct lttng_id_tracker vgid_tracker; |
| 488 | }; |
| 489 | |
| 490 | int lttng_kernel_probe_register(struct lttng_kernel_probe_desc *desc); |
| 491 | void lttng_kernel_probe_unregister(struct lttng_kernel_probe_desc *desc); |
| 492 | |
| 493 | bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id); |
| 494 | |
| 495 | #endif /* _LTTNG_EVENTS_H */ |