| 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_kernel_event_common_private { |
| 27 | struct lttng_kernel_event_common *pub; /* Public event interface */ |
| 28 | |
| 29 | const struct lttng_kernel_event_desc *desc; |
| 30 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
| 31 | struct list_head enablers_ref_head; |
| 32 | int registered; /* has reg'd tracepoint probe */ |
| 33 | uint64_t user_token; |
| 34 | |
| 35 | int has_enablers_without_filter_bytecode; |
| 36 | /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */ |
| 37 | struct list_head filter_bytecode_runtime_head; |
| 38 | enum lttng_kernel_abi_instrumentation instrumentation; |
| 39 | /* Selected by instrumentation */ |
| 40 | union { |
| 41 | struct lttng_kprobe kprobe; |
| 42 | struct lttng_uprobe uprobe; |
| 43 | struct { |
| 44 | struct lttng_krp *lttng_krp; |
| 45 | char *symbol_name; |
| 46 | } kretprobe; |
| 47 | struct { |
| 48 | enum lttng_syscall_entryexit entryexit; |
| 49 | enum lttng_syscall_abi abi; |
| 50 | struct hlist_node node; /* chain registered syscall event_notifier */ |
| 51 | unsigned int syscall_id; |
| 52 | } syscall; |
| 53 | } u; |
| 54 | }; |
| 55 | |
| 56 | struct lttng_kernel_event_recorder_private { |
| 57 | struct lttng_kernel_event_common_private parent; |
| 58 | |
| 59 | struct lttng_kernel_event_recorder *pub; /* Public event interface */ |
| 60 | struct list_head node; /* Event recorder list */ |
| 61 | struct hlist_node hlist; /* Hash table of event recorders */ |
| 62 | struct lttng_kernel_ctx *ctx; |
| 63 | unsigned int id; |
| 64 | unsigned int metadata_dumped:1; |
| 65 | }; |
| 66 | |
| 67 | struct lttng_kernel_event_notifier_private { |
| 68 | struct lttng_kernel_event_common_private parent; |
| 69 | |
| 70 | struct lttng_kernel_event_notifier *pub; /* Public event notifier interface */ |
| 71 | struct lttng_event_notifier_group *group; /* weak ref */ |
| 72 | size_t num_captures; /* Needed to allocate the msgpack array. */ |
| 73 | uint64_t error_counter_index; |
| 74 | struct list_head node; /* Event notifier list */ |
| 75 | struct hlist_node hlist; /* Hash table of event notifiers */ |
| 76 | struct list_head capture_bytecode_runtime_head; |
| 77 | |
| 78 | }; |
| 79 | |
| 80 | enum lttng_kernel_bytecode_interpreter_ret { |
| 81 | LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1, |
| 82 | LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0, |
| 83 | }; |
| 84 | |
| 85 | enum lttng_kernel_bytecode_filter_result { |
| 86 | LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0, |
| 87 | LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1, |
| 88 | }; |
| 89 | |
| 90 | struct lttng_kernel_bytecode_filter_ctx { |
| 91 | enum lttng_kernel_bytecode_filter_result result; |
| 92 | }; |
| 93 | |
| 94 | struct lttng_interpreter_output; |
| 95 | |
| 96 | enum lttng_kernel_bytecode_type { |
| 97 | LTTNG_KERNEL_BYTECODE_TYPE_FILTER, |
| 98 | LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE, |
| 99 | }; |
| 100 | |
| 101 | struct lttng_kernel_bytecode_node { |
| 102 | enum lttng_kernel_bytecode_type type; |
| 103 | struct list_head node; |
| 104 | struct lttng_enabler *enabler; |
| 105 | struct { |
| 106 | uint32_t len; |
| 107 | uint32_t reloc_offset; |
| 108 | uint64_t seqnum; |
| 109 | char data[]; |
| 110 | } bc; |
| 111 | }; |
| 112 | |
| 113 | struct lttng_kernel_bytecode_runtime { |
| 114 | /* Associated bytecode */ |
| 115 | enum lttng_kernel_bytecode_type type; |
| 116 | struct lttng_kernel_bytecode_node *bc; |
| 117 | int (*interpreter_func)(struct lttng_kernel_bytecode_runtime *kernel_bytecode, |
| 118 | const char *interpreter_stack_data, |
| 119 | struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
| 120 | void *caller_ctx); |
| 121 | int link_failed; |
| 122 | struct list_head node; /* list of bytecode runtime in event */ |
| 123 | struct lttng_kernel_ctx *ctx; |
| 124 | }; |
| 125 | |
| 126 | /* |
| 127 | * Enabler field, within whatever object is enabling an event. Target of |
| 128 | * backward reference. |
| 129 | */ |
| 130 | struct lttng_enabler { |
| 131 | enum lttng_enabler_format_type format_type; |
| 132 | |
| 133 | /* head list of struct lttng_kernel_bytecode_node */ |
| 134 | struct list_head filter_bytecode_head; |
| 135 | |
| 136 | struct lttng_kernel_abi_event event_param; |
| 137 | unsigned int enabled:1; |
| 138 | |
| 139 | uint64_t user_token; /* User-provided token. */ |
| 140 | }; |
| 141 | |
| 142 | struct lttng_event_enabler { |
| 143 | struct lttng_enabler base; |
| 144 | struct list_head node; /* per-session list of enablers */ |
| 145 | struct lttng_channel *chan; |
| 146 | }; |
| 147 | |
| 148 | struct lttng_event_notifier_enabler { |
| 149 | struct lttng_enabler base; |
| 150 | uint64_t error_counter_index; |
| 151 | struct list_head node; /* List of event_notifier enablers */ |
| 152 | struct lttng_event_notifier_group *group; |
| 153 | |
| 154 | /* head list of struct lttng_kernel_bytecode_node */ |
| 155 | struct list_head capture_bytecode_head; |
| 156 | uint64_t num_captures; |
| 157 | }; |
| 158 | |
| 159 | struct lttng_ctx_value { |
| 160 | union { |
| 161 | int64_t s64; |
| 162 | const char *str; |
| 163 | double d; |
| 164 | } u; |
| 165 | }; |
| 166 | |
| 167 | /* |
| 168 | * We need to keep this perf counter field separately from struct |
| 169 | * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses. |
| 170 | */ |
| 171 | struct lttng_perf_counter_field { |
| 172 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) |
| 173 | struct lttng_cpuhp_node cpuhp_prepare; |
| 174 | struct lttng_cpuhp_node cpuhp_online; |
| 175 | #else |
| 176 | struct notifier_block nb; |
| 177 | int hp_enable; |
| 178 | #endif |
| 179 | struct perf_event_attr *attr; |
| 180 | struct perf_event **e; /* per-cpu array */ |
| 181 | char *name; |
| 182 | struct lttng_kernel_event_field *event_field; |
| 183 | }; |
| 184 | |
| 185 | struct lttng_kernel_ctx_field { |
| 186 | const struct lttng_kernel_event_field *event_field; |
| 187 | size_t (*get_size)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 188 | size_t offset); |
| 189 | void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 190 | struct lib_ring_buffer_ctx *ctx, |
| 191 | struct lttng_channel *chan); |
| 192 | void (*get_value)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 193 | struct lttng_ctx_value *value); |
| 194 | void (*destroy)(void *priv); |
| 195 | void *priv; |
| 196 | }; |
| 197 | |
| 198 | struct lttng_kernel_ctx { |
| 199 | struct lttng_kernel_ctx_field *fields; |
| 200 | unsigned int nr_fields; |
| 201 | unsigned int allocated_fields; |
| 202 | size_t largest_align; /* in bytes */ |
| 203 | }; |
| 204 | |
| 205 | extern struct lttng_kernel_ctx *lttng_static_ctx; |
| 206 | |
| 207 | static inline |
| 208 | const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type) |
| 209 | { |
| 210 | if (type->type != lttng_kernel_type_integer) |
| 211 | return NULL; |
| 212 | return container_of(type, const struct lttng_kernel_type_integer, parent); |
| 213 | } |
| 214 | |
| 215 | static inline |
| 216 | const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type) |
| 217 | { |
| 218 | if (type->type != lttng_kernel_type_string) |
| 219 | return NULL; |
| 220 | return container_of(type, const struct lttng_kernel_type_string, parent); |
| 221 | } |
| 222 | |
| 223 | static inline |
| 224 | const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type) |
| 225 | { |
| 226 | if (type->type != lttng_kernel_type_enum) |
| 227 | return NULL; |
| 228 | return container_of(type, const struct lttng_kernel_type_enum, parent); |
| 229 | } |
| 230 | |
| 231 | static inline |
| 232 | const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type) |
| 233 | { |
| 234 | if (type->type != lttng_kernel_type_array) |
| 235 | return NULL; |
| 236 | return container_of(type, const struct lttng_kernel_type_array, parent); |
| 237 | } |
| 238 | |
| 239 | static inline |
| 240 | const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type) |
| 241 | { |
| 242 | if (type->type != lttng_kernel_type_sequence) |
| 243 | return NULL; |
| 244 | return container_of(type, const struct lttng_kernel_type_sequence, parent); |
| 245 | } |
| 246 | |
| 247 | static inline |
| 248 | const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type) |
| 249 | { |
| 250 | if (type->type != lttng_kernel_type_struct) |
| 251 | return NULL; |
| 252 | return container_of(type, const struct lttng_kernel_type_struct, parent); |
| 253 | } |
| 254 | |
| 255 | static inline |
| 256 | const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type) |
| 257 | { |
| 258 | if (type->type != lttng_kernel_type_variant) |
| 259 | return NULL; |
| 260 | return container_of(type, const struct lttng_kernel_type_variant, parent); |
| 261 | } |
| 262 | |
| 263 | static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type) |
| 264 | { |
| 265 | const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type); |
| 266 | |
| 267 | if (!type_integer) |
| 268 | return false; |
| 269 | switch (type_integer->size) { |
| 270 | case 8: /* Fall-through. */ |
| 271 | case 16: /* Fall-through. */ |
| 272 | case 32: /* Fall-through. */ |
| 273 | case 64: |
| 274 | break; |
| 275 | default: |
| 276 | return false; |
| 277 | } |
| 278 | return true; |
| 279 | } |
| 280 | |
| 281 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, |
| 282 | const char *interpreter_stack_data, |
| 283 | struct lttng_kernel_probe_ctx *probe_ctx, |
| 284 | void *event_filter_ctx); |
| 285 | |
| 286 | static inline |
| 287 | struct lttng_enabler *lttng_event_enabler_as_enabler( |
| 288 | struct lttng_event_enabler *event_enabler) |
| 289 | { |
| 290 | return &event_enabler->base; |
| 291 | } |
| 292 | |
| 293 | static inline |
| 294 | struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( |
| 295 | struct lttng_event_notifier_enabler *event_notifier_enabler) |
| 296 | { |
| 297 | return &event_notifier_enabler->base; |
| 298 | } |
| 299 | |
| 300 | int lttng_context_init(void); |
| 301 | void lttng_context_exit(void); |
| 302 | int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p, |
| 303 | const struct lttng_kernel_ctx_field *f); |
| 304 | void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p); |
| 305 | struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx, |
| 306 | size_t index); |
| 307 | int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name); |
| 308 | int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name); |
| 309 | void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx); |
| 310 | int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 311 | int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx); |
| 312 | int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx); |
| 313 | int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx); |
| 314 | int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx); |
| 315 | int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 316 | int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 317 | int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 318 | int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 319 | int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 320 | int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx); |
| 321 | int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx); |
| 322 | int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx); |
| 323 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) |
| 324 | int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx); |
| 325 | #else |
| 326 | static inline |
| 327 | int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx) |
| 328 | { |
| 329 | return -ENOSYS; |
| 330 | } |
| 331 | #endif |
| 332 | #ifdef CONFIG_PREEMPT_RT_FULL |
| 333 | int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx); |
| 334 | #else |
| 335 | static inline |
| 336 | int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx) |
| 337 | { |
| 338 | return -ENOSYS; |
| 339 | } |
| 340 | #endif |
| 341 | |
| 342 | int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type); |
| 343 | |
| 344 | #if defined(CONFIG_CGROUPS) && \ |
| 345 | ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \ |
| 346 | LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0)) |
| 347 | int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 348 | #else |
| 349 | static inline |
| 350 | int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 351 | { |
| 352 | return -ENOSYS; |
| 353 | } |
| 354 | #endif |
| 355 | |
| 356 | #if defined(CONFIG_IPC_NS) && \ |
| 357 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 358 | int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 359 | #else |
| 360 | static inline |
| 361 | int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 362 | { |
| 363 | return -ENOSYS; |
| 364 | } |
| 365 | #endif |
| 366 | |
| 367 | #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \ |
| 368 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 369 | int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 370 | #else |
| 371 | static inline |
| 372 | int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 373 | { |
| 374 | return -ENOSYS; |
| 375 | } |
| 376 | #endif |
| 377 | |
| 378 | #if defined(CONFIG_NET_NS) && \ |
| 379 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 380 | int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 381 | #else |
| 382 | static inline |
| 383 | int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 384 | { |
| 385 | return -ENOSYS; |
| 386 | } |
| 387 | #endif |
| 388 | |
| 389 | #if defined(CONFIG_PID_NS) && \ |
| 390 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 391 | int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 392 | #else |
| 393 | static inline |
| 394 | int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 395 | { |
| 396 | return -ENOSYS; |
| 397 | } |
| 398 | #endif |
| 399 | |
| 400 | #if defined(CONFIG_USER_NS) && \ |
| 401 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 402 | int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 403 | #else |
| 404 | static inline |
| 405 | int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 406 | { |
| 407 | return -ENOSYS; |
| 408 | } |
| 409 | #endif |
| 410 | |
| 411 | #if defined(CONFIG_UTS_NS) && \ |
| 412 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 413 | int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 414 | #else |
| 415 | static inline |
| 416 | int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 417 | { |
| 418 | return -ENOSYS; |
| 419 | } |
| 420 | #endif |
| 421 | |
| 422 | #if defined(CONFIG_TIME_NS) && \ |
| 423 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) |
| 424 | int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 425 | #else |
| 426 | static inline |
| 427 | int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 428 | { |
| 429 | return -ENOSYS; |
| 430 | } |
| 431 | #endif |
| 432 | |
| 433 | int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 434 | int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 435 | int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 436 | int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 437 | int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 438 | int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 439 | int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 440 | int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 441 | int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 442 | int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 443 | int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 444 | int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 445 | |
| 446 | #if defined(CONFIG_PERF_EVENTS) |
| 447 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 448 | uint64_t config, |
| 449 | const char *name, |
| 450 | struct lttng_kernel_ctx **ctx); |
| 451 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 452 | struct lttng_cpuhp_node *node); |
| 453 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 454 | struct lttng_cpuhp_node *node); |
| 455 | #else |
| 456 | static inline |
| 457 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 458 | uint64_t config, |
| 459 | const char *name, |
| 460 | struct lttng_kernel_ctx **ctx) |
| 461 | { |
| 462 | return -ENOSYS; |
| 463 | } |
| 464 | static inline |
| 465 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 466 | struct lttng_cpuhp_node *node) |
| 467 | { |
| 468 | return 0; |
| 469 | } |
| 470 | static inline |
| 471 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 472 | struct lttng_cpuhp_node *node) |
| 473 | { |
| 474 | return 0; |
| 475 | } |
| 476 | #endif |
| 477 | |
| 478 | struct lttng_event_enabler *lttng_event_enabler_create( |
| 479 | enum lttng_enabler_format_type format_type, |
| 480 | struct lttng_kernel_abi_event *event_param, |
| 481 | struct lttng_channel *chan); |
| 482 | |
| 483 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); |
| 484 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler); |
| 485 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
| 486 | struct lttng_event_notifier_group *event_notifier_group, |
| 487 | enum lttng_enabler_format_type format_type, |
| 488 | struct lttng_kernel_abi_event_notifier *event_notifier_param); |
| 489 | |
| 490 | int lttng_event_notifier_enabler_enable( |
| 491 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 492 | int lttng_event_notifier_enabler_disable( |
| 493 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 494 | |
| 495 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
| 496 | struct lttng_kernel_abi_filter_bytecode __user *bytecode); |
| 497 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
| 498 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
| 499 | struct lttng_kernel_abi_filter_bytecode __user *bytecode); |
| 500 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
| 501 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
| 502 | struct lttng_kernel_abi_capture_bytecode __user *bytecode); |
| 503 | |
| 504 | int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, |
| 505 | struct lttng_enabler *enabler); |
| 506 | |
| 507 | void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc, |
| 508 | struct lttng_kernel_ctx *ctx, |
| 509 | struct list_head *instance_bytecode_runtime_head, |
| 510 | struct list_head *enabler_bytecode_runtime_head); |
| 511 | |
| 512 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
| 513 | int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler); |
| 514 | int lttng_syscalls_unregister_channel(struct lttng_channel *chan); |
| 515 | int lttng_syscalls_destroy_event(struct lttng_channel *chan); |
| 516 | int lttng_syscall_filter_enable_event( |
| 517 | struct lttng_channel *chan, |
| 518 | struct lttng_kernel_event_recorder *event); |
| 519 | int lttng_syscall_filter_disable_event( |
| 520 | struct lttng_channel *chan, |
| 521 | struct lttng_kernel_event_recorder *event); |
| 522 | |
| 523 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 524 | struct lttng_kernel_abi_syscall_mask __user *usyscall_mask); |
| 525 | |
| 526 | int lttng_syscalls_register_event_notifier( |
| 527 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 528 | int lttng_syscalls_create_matching_event_notifiers( |
| 529 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 530 | int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group); |
| 531 | int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier); |
| 532 | int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier); |
| 533 | #else |
| 534 | static inline int lttng_syscalls_register_event( |
| 535 | struct lttng_event_enabler *event_enabler) |
| 536 | { |
| 537 | return -ENOSYS; |
| 538 | } |
| 539 | |
| 540 | static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan) |
| 541 | { |
| 542 | return 0; |
| 543 | } |
| 544 | |
| 545 | static inline int lttng_syscalls_destroy(struct lttng_channel *chan) |
| 546 | { |
| 547 | return 0; |
| 548 | } |
| 549 | |
| 550 | static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan, |
| 551 | struct lttng_kernel_event_recorder *event); |
| 552 | { |
| 553 | return -ENOSYS; |
| 554 | } |
| 555 | |
| 556 | static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan, |
| 557 | struct lttng_kernel_event_recorder *event); |
| 558 | { |
| 559 | return -ENOSYS; |
| 560 | } |
| 561 | |
| 562 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 563 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
| 564 | { |
| 565 | return -ENOSYS; |
| 566 | } |
| 567 | |
| 568 | static inline int lttng_syscalls_register_event_notifier( |
| 569 | struct lttng_event_notifier_group *group) |
| 570 | { |
| 571 | return -ENOSYS; |
| 572 | } |
| 573 | |
| 574 | static inline int lttng_syscalls_unregister_event_notifier_group( |
| 575 | struct lttng_event_notifier_group *group) |
| 576 | { |
| 577 | return 0; |
| 578 | } |
| 579 | |
| 580 | static inline int lttng_syscall_filter_enable_event_notifier( |
| 581 | struct lttng_event_notifier_group *group, |
| 582 | const char *name) |
| 583 | { |
| 584 | return -ENOSYS; |
| 585 | } |
| 586 | |
| 587 | static inline int lttng_syscall_filter_disable_event_notifier( |
| 588 | struct lttng_event_notifier_group *group, |
| 589 | const char *name) |
| 590 | { |
| 591 | return -ENOSYS; |
| 592 | } |
| 593 | |
| 594 | #endif |
| 595 | |
| 596 | #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \ |
| 597 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \ |
| 598 | .event_field = (_event_field), \ |
| 599 | .get_size = (_get_size), \ |
| 600 | .record = (_record), \ |
| 601 | .get_value = (_get_value), \ |
| 602 | .destroy = (_destroy), \ |
| 603 | .priv = (_priv), \ |
| 604 | }) |
| 605 | |
| 606 | #endif /* _LTTNG_EVENTS_INTERNAL_H */ |