| 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * |
| 3 | * lttng/events-internal.h |
| 4 | * |
| 5 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 6 | */ |
| 7 | |
| 8 | #ifndef _LTTNG_EVENTS_INTERNAL_H |
| 9 | #define _LTTNG_EVENTS_INTERNAL_H |
| 10 | |
| 11 | #include <lttng/events.h> |
| 12 | |
| 13 | enum lttng_enabler_format_type { |
| 14 | LTTNG_ENABLER_FORMAT_STAR_GLOB, |
| 15 | LTTNG_ENABLER_FORMAT_NAME, |
| 16 | }; |
| 17 | |
| 18 | /* |
| 19 | * Objects in a linked-list of enablers, owned by an event. |
| 20 | */ |
| 21 | struct lttng_enabler_ref { |
| 22 | struct list_head node; /* enabler ref list */ |
| 23 | struct lttng_enabler *ref; /* backward ref */ |
| 24 | }; |
| 25 | |
| 26 | struct lttng_krp; /* Kretprobe handling */ |
| 27 | |
| 28 | struct lttng_uprobe_handler { |
| 29 | struct lttng_kernel_event_common *event; |
| 30 | loff_t offset; |
| 31 | struct uprobe_consumer up_consumer; |
| 32 | struct list_head node; |
| 33 | }; |
| 34 | |
| 35 | struct lttng_kprobe { |
| 36 | struct kprobe kp; |
| 37 | char *symbol_name; |
| 38 | }; |
| 39 | |
| 40 | struct lttng_uprobe { |
| 41 | struct inode *inode; |
| 42 | struct list_head head; |
| 43 | }; |
| 44 | |
| 45 | enum lttng_syscall_entryexit { |
| 46 | LTTNG_SYSCALL_ENTRY, |
| 47 | LTTNG_SYSCALL_EXIT, |
| 48 | }; |
| 49 | |
| 50 | enum lttng_syscall_abi { |
| 51 | LTTNG_SYSCALL_ABI_NATIVE, |
| 52 | LTTNG_SYSCALL_ABI_COMPAT, |
| 53 | }; |
| 54 | |
| 55 | struct lttng_kernel_event_common_private { |
| 56 | struct lttng_kernel_event_common *pub; /* Public event interface */ |
| 57 | |
| 58 | const struct lttng_kernel_event_desc *desc; |
| 59 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
| 60 | struct list_head enablers_ref_head; |
| 61 | int registered; /* has reg'd tracepoint probe */ |
| 62 | uint64_t user_token; |
| 63 | |
| 64 | int has_enablers_without_filter_bytecode; |
| 65 | /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */ |
| 66 | struct list_head filter_bytecode_runtime_head; |
| 67 | enum lttng_kernel_abi_instrumentation instrumentation; |
| 68 | /* Selected by instrumentation */ |
| 69 | union { |
| 70 | struct lttng_kprobe kprobe; |
| 71 | struct lttng_uprobe uprobe; |
| 72 | struct { |
| 73 | struct lttng_krp *lttng_krp; |
| 74 | char *symbol_name; |
| 75 | } kretprobe; |
| 76 | struct { |
| 77 | enum lttng_syscall_entryexit entryexit; |
| 78 | enum lttng_syscall_abi abi; |
| 79 | struct hlist_node node; /* chain registered syscall event_notifier */ |
| 80 | unsigned int syscall_id; |
| 81 | } syscall; |
| 82 | } u; |
| 83 | }; |
| 84 | |
| 85 | struct lttng_kernel_event_recorder_private { |
| 86 | struct lttng_kernel_event_common_private parent; |
| 87 | |
| 88 | struct lttng_kernel_event_recorder *pub; /* Public event interface */ |
| 89 | struct list_head node; /* Event recorder list */ |
| 90 | struct hlist_node hlist; /* Hash table of event recorders */ |
| 91 | struct lttng_kernel_ctx *ctx; |
| 92 | unsigned int id; |
| 93 | unsigned int metadata_dumped:1; |
| 94 | }; |
| 95 | |
| 96 | struct lttng_kernel_event_notifier_private { |
| 97 | struct lttng_kernel_event_common_private parent; |
| 98 | |
| 99 | struct lttng_kernel_event_notifier *pub; /* Public event notifier interface */ |
| 100 | struct lttng_event_notifier_group *group; /* weak ref */ |
| 101 | size_t num_captures; /* Needed to allocate the msgpack array. */ |
| 102 | uint64_t error_counter_index; |
| 103 | struct list_head node; /* Event notifier list */ |
| 104 | struct hlist_node hlist; /* Hash table of event notifiers */ |
| 105 | struct list_head capture_bytecode_runtime_head; |
| 106 | |
| 107 | }; |
| 108 | |
| 109 | enum lttng_kernel_bytecode_interpreter_ret { |
| 110 | LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1, |
| 111 | LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0, |
| 112 | }; |
| 113 | |
| 114 | enum lttng_kernel_bytecode_filter_result { |
| 115 | LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0, |
| 116 | LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1, |
| 117 | }; |
| 118 | |
| 119 | struct lttng_kernel_bytecode_filter_ctx { |
| 120 | enum lttng_kernel_bytecode_filter_result result; |
| 121 | }; |
| 122 | |
| 123 | struct lttng_interpreter_output; |
| 124 | |
| 125 | enum lttng_kernel_bytecode_type { |
| 126 | LTTNG_KERNEL_BYTECODE_TYPE_FILTER, |
| 127 | LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE, |
| 128 | }; |
| 129 | |
| 130 | struct lttng_kernel_bytecode_node { |
| 131 | enum lttng_kernel_bytecode_type type; |
| 132 | struct list_head node; |
| 133 | struct lttng_enabler *enabler; |
| 134 | struct { |
| 135 | uint32_t len; |
| 136 | uint32_t reloc_offset; |
| 137 | uint64_t seqnum; |
| 138 | char data[]; |
| 139 | } bc; |
| 140 | }; |
| 141 | |
| 142 | struct lttng_kernel_bytecode_runtime { |
| 143 | /* Associated bytecode */ |
| 144 | enum lttng_kernel_bytecode_type type; |
| 145 | struct lttng_kernel_bytecode_node *bc; |
| 146 | int (*interpreter_func)(struct lttng_kernel_bytecode_runtime *kernel_bytecode, |
| 147 | const char *interpreter_stack_data, |
| 148 | struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
| 149 | void *caller_ctx); |
| 150 | int link_failed; |
| 151 | struct list_head node; /* list of bytecode runtime in event */ |
| 152 | struct lttng_kernel_ctx *ctx; |
| 153 | }; |
| 154 | |
| 155 | /* |
| 156 | * Enabler field, within whatever object is enabling an event. Target of |
| 157 | * backward reference. |
| 158 | */ |
| 159 | struct lttng_enabler { |
| 160 | enum lttng_enabler_format_type format_type; |
| 161 | |
| 162 | /* head list of struct lttng_kernel_bytecode_node */ |
| 163 | struct list_head filter_bytecode_head; |
| 164 | |
| 165 | struct lttng_kernel_abi_event event_param; |
| 166 | unsigned int enabled:1; |
| 167 | |
| 168 | uint64_t user_token; /* User-provided token. */ |
| 169 | }; |
| 170 | |
| 171 | struct lttng_event_enabler { |
| 172 | struct lttng_enabler base; |
| 173 | struct list_head node; /* per-session list of enablers */ |
| 174 | struct lttng_channel *chan; |
| 175 | }; |
| 176 | |
| 177 | struct lttng_event_notifier_enabler { |
| 178 | struct lttng_enabler base; |
| 179 | uint64_t error_counter_index; |
| 180 | struct list_head node; /* List of event_notifier enablers */ |
| 181 | struct lttng_event_notifier_group *group; |
| 182 | |
| 183 | /* head list of struct lttng_kernel_bytecode_node */ |
| 184 | struct list_head capture_bytecode_head; |
| 185 | uint64_t num_captures; |
| 186 | }; |
| 187 | |
| 188 | struct lttng_ctx_value { |
| 189 | union { |
| 190 | int64_t s64; |
| 191 | const char *str; |
| 192 | double d; |
| 193 | } u; |
| 194 | }; |
| 195 | |
| 196 | /* |
| 197 | * We need to keep this perf counter field separately from struct |
| 198 | * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses. |
| 199 | */ |
| 200 | struct lttng_perf_counter_field { |
| 201 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) |
| 202 | struct lttng_cpuhp_node cpuhp_prepare; |
| 203 | struct lttng_cpuhp_node cpuhp_online; |
| 204 | #else |
| 205 | struct notifier_block nb; |
| 206 | int hp_enable; |
| 207 | #endif |
| 208 | struct perf_event_attr *attr; |
| 209 | struct perf_event **e; /* per-cpu array */ |
| 210 | char *name; |
| 211 | struct lttng_kernel_event_field *event_field; |
| 212 | }; |
| 213 | |
| 214 | struct lttng_kernel_ctx_field { |
| 215 | const struct lttng_kernel_event_field *event_field; |
| 216 | size_t (*get_size)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 217 | size_t offset); |
| 218 | void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 219 | struct lib_ring_buffer_ctx *ctx, |
| 220 | struct lttng_channel *chan); |
| 221 | void (*get_value)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 222 | struct lttng_ctx_value *value); |
| 223 | void (*destroy)(void *priv); |
| 224 | void *priv; |
| 225 | }; |
| 226 | |
| 227 | struct lttng_kernel_ctx { |
| 228 | struct lttng_kernel_ctx_field *fields; |
| 229 | unsigned int nr_fields; |
| 230 | unsigned int allocated_fields; |
| 231 | size_t largest_align; /* in bytes */ |
| 232 | }; |
| 233 | |
| 234 | extern struct lttng_kernel_ctx *lttng_static_ctx; |
| 235 | |
| 236 | static inline |
| 237 | const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type) |
| 238 | { |
| 239 | if (type->type != lttng_kernel_type_integer) |
| 240 | return NULL; |
| 241 | return container_of(type, const struct lttng_kernel_type_integer, parent); |
| 242 | } |
| 243 | |
| 244 | static inline |
| 245 | const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type) |
| 246 | { |
| 247 | if (type->type != lttng_kernel_type_string) |
| 248 | return NULL; |
| 249 | return container_of(type, const struct lttng_kernel_type_string, parent); |
| 250 | } |
| 251 | |
| 252 | static inline |
| 253 | const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type) |
| 254 | { |
| 255 | if (type->type != lttng_kernel_type_enum) |
| 256 | return NULL; |
| 257 | return container_of(type, const struct lttng_kernel_type_enum, parent); |
| 258 | } |
| 259 | |
| 260 | static inline |
| 261 | const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type) |
| 262 | { |
| 263 | if (type->type != lttng_kernel_type_array) |
| 264 | return NULL; |
| 265 | return container_of(type, const struct lttng_kernel_type_array, parent); |
| 266 | } |
| 267 | |
| 268 | static inline |
| 269 | const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type) |
| 270 | { |
| 271 | if (type->type != lttng_kernel_type_sequence) |
| 272 | return NULL; |
| 273 | return container_of(type, const struct lttng_kernel_type_sequence, parent); |
| 274 | } |
| 275 | |
| 276 | static inline |
| 277 | const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type) |
| 278 | { |
| 279 | if (type->type != lttng_kernel_type_struct) |
| 280 | return NULL; |
| 281 | return container_of(type, const struct lttng_kernel_type_struct, parent); |
| 282 | } |
| 283 | |
| 284 | static inline |
| 285 | const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type) |
| 286 | { |
| 287 | if (type->type != lttng_kernel_type_variant) |
| 288 | return NULL; |
| 289 | return container_of(type, const struct lttng_kernel_type_variant, parent); |
| 290 | } |
| 291 | |
| 292 | static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type) |
| 293 | { |
| 294 | const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type); |
| 295 | |
| 296 | if (!type_integer) |
| 297 | return false; |
| 298 | switch (type_integer->size) { |
| 299 | case 8: /* Fall-through. */ |
| 300 | case 16: /* Fall-through. */ |
| 301 | case 32: /* Fall-through. */ |
| 302 | case 64: |
| 303 | break; |
| 304 | default: |
| 305 | return false; |
| 306 | } |
| 307 | return true; |
| 308 | } |
| 309 | |
| 310 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, |
| 311 | const char *interpreter_stack_data, |
| 312 | struct lttng_kernel_probe_ctx *probe_ctx, |
| 313 | void *event_filter_ctx); |
| 314 | |
| 315 | static inline |
| 316 | struct lttng_enabler *lttng_event_enabler_as_enabler( |
| 317 | struct lttng_event_enabler *event_enabler) |
| 318 | { |
| 319 | return &event_enabler->base; |
| 320 | } |
| 321 | |
| 322 | static inline |
| 323 | struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( |
| 324 | struct lttng_event_notifier_enabler *event_notifier_enabler) |
| 325 | { |
| 326 | return &event_notifier_enabler->base; |
| 327 | } |
| 328 | |
| 329 | int lttng_context_init(void); |
| 330 | void lttng_context_exit(void); |
| 331 | int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p, |
| 332 | const struct lttng_kernel_ctx_field *f); |
| 333 | void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p); |
| 334 | struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx, |
| 335 | size_t index); |
| 336 | int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name); |
| 337 | int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name); |
| 338 | void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx); |
| 339 | int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 340 | int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx); |
| 341 | int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx); |
| 342 | int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx); |
| 343 | int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx); |
| 344 | int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 345 | int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 346 | int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 347 | int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 348 | int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 349 | int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx); |
| 350 | int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx); |
| 351 | int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx); |
| 352 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) |
| 353 | int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx); |
| 354 | #else |
| 355 | static inline |
| 356 | int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx) |
| 357 | { |
| 358 | return -ENOSYS; |
| 359 | } |
| 360 | #endif |
| 361 | #ifdef CONFIG_PREEMPT_RT_FULL |
| 362 | int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx); |
| 363 | #else |
| 364 | static inline |
| 365 | int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx) |
| 366 | { |
| 367 | return -ENOSYS; |
| 368 | } |
| 369 | #endif |
| 370 | |
| 371 | int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type); |
| 372 | |
| 373 | #if defined(CONFIG_CGROUPS) && \ |
| 374 | ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \ |
| 375 | LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0)) |
| 376 | int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 377 | #else |
| 378 | static inline |
| 379 | int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 380 | { |
| 381 | return -ENOSYS; |
| 382 | } |
| 383 | #endif |
| 384 | |
| 385 | #if defined(CONFIG_IPC_NS) && \ |
| 386 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 387 | int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 388 | #else |
| 389 | static inline |
| 390 | int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 391 | { |
| 392 | return -ENOSYS; |
| 393 | } |
| 394 | #endif |
| 395 | |
| 396 | #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \ |
| 397 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 398 | int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 399 | #else |
| 400 | static inline |
| 401 | int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 402 | { |
| 403 | return -ENOSYS; |
| 404 | } |
| 405 | #endif |
| 406 | |
| 407 | #if defined(CONFIG_NET_NS) && \ |
| 408 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 409 | int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 410 | #else |
| 411 | static inline |
| 412 | int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 413 | { |
| 414 | return -ENOSYS; |
| 415 | } |
| 416 | #endif |
| 417 | |
| 418 | #if defined(CONFIG_PID_NS) && \ |
| 419 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 420 | int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 421 | #else |
| 422 | static inline |
| 423 | int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 424 | { |
| 425 | return -ENOSYS; |
| 426 | } |
| 427 | #endif |
| 428 | |
| 429 | #if defined(CONFIG_USER_NS) && \ |
| 430 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 431 | int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 432 | #else |
| 433 | static inline |
| 434 | int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 435 | { |
| 436 | return -ENOSYS; |
| 437 | } |
| 438 | #endif |
| 439 | |
| 440 | #if defined(CONFIG_UTS_NS) && \ |
| 441 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 442 | int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 443 | #else |
| 444 | static inline |
| 445 | int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 446 | { |
| 447 | return -ENOSYS; |
| 448 | } |
| 449 | #endif |
| 450 | |
| 451 | #if defined(CONFIG_TIME_NS) && \ |
| 452 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0)) |
| 453 | int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 454 | #else |
| 455 | static inline |
| 456 | int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 457 | { |
| 458 | return -ENOSYS; |
| 459 | } |
| 460 | #endif |
| 461 | |
| 462 | int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 463 | int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 464 | int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 465 | int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 466 | int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 467 | int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 468 | int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 469 | int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 470 | int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 471 | int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 472 | int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 473 | int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 474 | |
| 475 | #if defined(CONFIG_PERF_EVENTS) |
| 476 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 477 | uint64_t config, |
| 478 | const char *name, |
| 479 | struct lttng_kernel_ctx **ctx); |
| 480 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 481 | struct lttng_cpuhp_node *node); |
| 482 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 483 | struct lttng_cpuhp_node *node); |
| 484 | #else |
| 485 | static inline |
| 486 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 487 | uint64_t config, |
| 488 | const char *name, |
| 489 | struct lttng_kernel_ctx **ctx) |
| 490 | { |
| 491 | return -ENOSYS; |
| 492 | } |
| 493 | static inline |
| 494 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 495 | struct lttng_cpuhp_node *node) |
| 496 | { |
| 497 | return 0; |
| 498 | } |
| 499 | static inline |
| 500 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 501 | struct lttng_cpuhp_node *node) |
| 502 | { |
| 503 | return 0; |
| 504 | } |
| 505 | #endif |
| 506 | |
| 507 | struct lttng_event_enabler *lttng_event_enabler_create( |
| 508 | enum lttng_enabler_format_type format_type, |
| 509 | struct lttng_kernel_abi_event *event_param, |
| 510 | struct lttng_channel *chan); |
| 511 | |
| 512 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); |
| 513 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler); |
| 514 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
| 515 | struct lttng_event_notifier_group *event_notifier_group, |
| 516 | enum lttng_enabler_format_type format_type, |
| 517 | struct lttng_kernel_abi_event_notifier *event_notifier_param); |
| 518 | |
| 519 | int lttng_event_notifier_enabler_enable( |
| 520 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 521 | int lttng_event_notifier_enabler_disable( |
| 522 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 523 | |
| 524 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
| 525 | struct lttng_kernel_abi_filter_bytecode __user *bytecode); |
| 526 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
| 527 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
| 528 | struct lttng_kernel_abi_filter_bytecode __user *bytecode); |
| 529 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
| 530 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
| 531 | struct lttng_kernel_abi_capture_bytecode __user *bytecode); |
| 532 | |
| 533 | int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, |
| 534 | struct lttng_enabler *enabler); |
| 535 | |
| 536 | void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc, |
| 537 | struct lttng_kernel_ctx *ctx, |
| 538 | struct list_head *instance_bytecode_runtime_head, |
| 539 | struct list_head *enabler_bytecode_runtime_head); |
| 540 | |
| 541 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
| 542 | int lttng_syscalls_register_event(struct lttng_event_enabler *event_enabler); |
| 543 | int lttng_syscalls_unregister_channel(struct lttng_channel *chan); |
| 544 | int lttng_syscalls_destroy_event(struct lttng_channel *chan); |
| 545 | int lttng_syscall_filter_enable_event( |
| 546 | struct lttng_channel *chan, |
| 547 | struct lttng_kernel_event_recorder *event); |
| 548 | int lttng_syscall_filter_disable_event( |
| 549 | struct lttng_channel *chan, |
| 550 | struct lttng_kernel_event_recorder *event); |
| 551 | |
| 552 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 553 | struct lttng_kernel_abi_syscall_mask __user *usyscall_mask); |
| 554 | |
| 555 | int lttng_syscalls_register_event_notifier( |
| 556 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 557 | int lttng_syscalls_create_matching_event_notifiers( |
| 558 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 559 | int lttng_syscalls_unregister_event_notifier_group(struct lttng_event_notifier_group *group); |
| 560 | int lttng_syscall_filter_enable_event_notifier(struct lttng_kernel_event_notifier *event_notifier); |
| 561 | int lttng_syscall_filter_disable_event_notifier(struct lttng_kernel_event_notifier *event_notifier); |
| 562 | #else |
| 563 | static inline int lttng_syscalls_register_event( |
| 564 | struct lttng_event_enabler *event_enabler) |
| 565 | { |
| 566 | return -ENOSYS; |
| 567 | } |
| 568 | |
| 569 | static inline int lttng_syscalls_unregister_channel(struct lttng_channel *chan) |
| 570 | { |
| 571 | return 0; |
| 572 | } |
| 573 | |
| 574 | static inline int lttng_syscalls_destroy(struct lttng_channel *chan) |
| 575 | { |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan, |
| 580 | struct lttng_kernel_event_recorder *event); |
| 581 | { |
| 582 | return -ENOSYS; |
| 583 | } |
| 584 | |
| 585 | static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan, |
| 586 | struct lttng_kernel_event_recorder *event); |
| 587 | { |
| 588 | return -ENOSYS; |
| 589 | } |
| 590 | |
| 591 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 592 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
| 593 | { |
| 594 | return -ENOSYS; |
| 595 | } |
| 596 | |
| 597 | static inline int lttng_syscalls_register_event_notifier( |
| 598 | struct lttng_event_notifier_group *group) |
| 599 | { |
| 600 | return -ENOSYS; |
| 601 | } |
| 602 | |
| 603 | static inline int lttng_syscalls_unregister_event_notifier_group( |
| 604 | struct lttng_event_notifier_group *group) |
| 605 | { |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | static inline int lttng_syscall_filter_enable_event_notifier( |
| 610 | struct lttng_event_notifier_group *group, |
| 611 | const char *name) |
| 612 | { |
| 613 | return -ENOSYS; |
| 614 | } |
| 615 | |
| 616 | static inline int lttng_syscall_filter_disable_event_notifier( |
| 617 | struct lttng_event_notifier_group *group, |
| 618 | const char *name) |
| 619 | { |
| 620 | return -ENOSYS; |
| 621 | } |
| 622 | |
| 623 | #endif |
| 624 | |
| 625 | #ifdef CONFIG_KPROBES |
| 626 | int lttng_kprobes_register_event(const char *name, |
| 627 | const char *symbol_name, |
| 628 | uint64_t offset, |
| 629 | uint64_t addr, |
| 630 | struct lttng_kernel_event_recorder *event); |
| 631 | void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event); |
| 632 | void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event); |
| 633 | int lttng_kprobes_register_event_notifier(const char *symbol_name, |
| 634 | uint64_t offset, |
| 635 | uint64_t addr, |
| 636 | struct lttng_kernel_event_notifier *event_notifier); |
| 637 | void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier); |
| 638 | void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier); |
| 639 | #else |
| 640 | static inline |
| 641 | int lttng_kprobes_register_event(const char *name, |
| 642 | const char *symbol_name, |
| 643 | uint64_t offset, |
| 644 | uint64_t addr, |
| 645 | struct lttng_kernel_event_recorder *event) |
| 646 | { |
| 647 | return -ENOSYS; |
| 648 | } |
| 649 | |
| 650 | static inline |
| 651 | void lttng_kprobes_unregister_event(struct lttng_kernel_event_recorder *event) |
| 652 | { |
| 653 | } |
| 654 | |
| 655 | static inline |
| 656 | void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_recorder *event) |
| 657 | { |
| 658 | } |
| 659 | |
| 660 | static inline |
| 661 | int lttng_kprobes_register_event_notifier(const char *symbol_name, |
| 662 | uint64_t offset, |
| 663 | uint64_t addr, |
| 664 | struct lttng_kernel_event_notifier *event_notifier) |
| 665 | { |
| 666 | return -ENOSYS; |
| 667 | } |
| 668 | |
| 669 | static inline |
| 670 | void lttng_kprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier) |
| 671 | { |
| 672 | } |
| 673 | |
| 674 | static inline |
| 675 | void lttng_kprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier) |
| 676 | { |
| 677 | } |
| 678 | #endif |
| 679 | |
| 680 | int lttng_event_add_callsite(struct lttng_kernel_event_common *event, |
| 681 | struct lttng_kernel_abi_event_callsite __user *callsite); |
| 682 | |
| 683 | #ifdef CONFIG_UPROBES |
| 684 | int lttng_uprobes_register_event(const char *name, |
| 685 | int fd, struct lttng_kernel_event_recorder *event); |
| 686 | int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event, |
| 687 | struct lttng_kernel_abi_event_callsite __user *callsite); |
| 688 | void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event); |
| 689 | void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event); |
| 690 | int lttng_uprobes_register_event_notifier(const char *name, |
| 691 | int fd, struct lttng_kernel_event_notifier *event_notifier); |
| 692 | void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier); |
| 693 | void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier); |
| 694 | #else |
| 695 | static inline |
| 696 | int lttng_uprobes_register_event(const char *name, |
| 697 | int fd, struct lttng_kernel_event_recorder *event) |
| 698 | { |
| 699 | return -ENOSYS; |
| 700 | } |
| 701 | |
| 702 | static inline |
| 703 | int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event, |
| 704 | struct lttng_kernel_abi_event_callsite __user *callsite) |
| 705 | { |
| 706 | return -ENOSYS; |
| 707 | } |
| 708 | |
| 709 | static inline |
| 710 | void lttng_uprobes_unregister_event(struct lttng_kernel_event_recorder *event) |
| 711 | { |
| 712 | } |
| 713 | |
| 714 | static inline |
| 715 | void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_recorder *event) |
| 716 | { |
| 717 | } |
| 718 | |
| 719 | static inline |
| 720 | int lttng_uprobes_register_event_notifier(const char *name, |
| 721 | int fd, struct lttng_kernel_event_notifier *event_notifier) |
| 722 | { |
| 723 | return -ENOSYS; |
| 724 | } |
| 725 | |
| 726 | static inline |
| 727 | void lttng_uprobes_unregister_event_notifier(struct lttng_kernel_event_notifier *event_notifier) |
| 728 | { |
| 729 | } |
| 730 | |
| 731 | static inline |
| 732 | void lttng_uprobes_destroy_event_notifier_private(struct lttng_kernel_event_notifier *event_notifier) |
| 733 | { |
| 734 | } |
| 735 | #endif |
| 736 | |
| 737 | #ifdef CONFIG_KRETPROBES |
| 738 | int lttng_kretprobes_register(const char *name, |
| 739 | const char *symbol_name, |
| 740 | uint64_t offset, |
| 741 | uint64_t addr, |
| 742 | struct lttng_kernel_event_recorder *event_entry, |
| 743 | struct lttng_kernel_event_recorder *event_exit); |
| 744 | void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event); |
| 745 | void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event); |
| 746 | int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event, |
| 747 | int enable); |
| 748 | #else |
| 749 | static inline |
| 750 | int lttng_kretprobes_register(const char *name, |
| 751 | const char *symbol_name, |
| 752 | uint64_t offset, |
| 753 | uint64_t addr, |
| 754 | struct lttng_kernel_event_recorder *event_entry, |
| 755 | struct lttng_kernel_event_recorder *event_exit) |
| 756 | { |
| 757 | return -ENOSYS; |
| 758 | } |
| 759 | |
| 760 | static inline |
| 761 | void lttng_kretprobes_unregister(struct lttng_kernel_event_recorder *event) |
| 762 | { |
| 763 | } |
| 764 | |
| 765 | static inline |
| 766 | void lttng_kretprobes_destroy_private(struct lttng_kernel_event_recorder *event) |
| 767 | { |
| 768 | } |
| 769 | |
| 770 | static inline |
| 771 | int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event, |
| 772 | int enable) |
| 773 | { |
| 774 | return -ENOSYS; |
| 775 | } |
| 776 | #endif |
| 777 | |
| 778 | #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \ |
| 779 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \ |
| 780 | .event_field = (_event_field), \ |
| 781 | .get_size = (_get_size), \ |
| 782 | .record = (_record), \ |
| 783 | .get_value = (_get_value), \ |
| 784 | .destroy = (_destroy), \ |
| 785 | .priv = (_priv), \ |
| 786 | }) |
| 787 | |
| 788 | #endif /* _LTTNG_EVENTS_INTERNAL_H */ |