| 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 <linux/irq_work.h> |
| 14 | #include <linux/version.h> |
| 15 | #include <linux/list.h> |
| 16 | #include <linux/kprobes.h> |
| 17 | #include <linux/kref.h> |
| 18 | #include <linux/uuid.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)) < 0) |
| 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 abstract_types { |
| 39 | atype_integer, |
| 40 | atype_string, |
| 41 | atype_enum_nestable, |
| 42 | atype_array_nestable, |
| 43 | atype_sequence_nestable, |
| 44 | atype_struct_nestable, |
| 45 | atype_variant_nestable, |
| 46 | NR_ABSTRACT_TYPES, |
| 47 | }; |
| 48 | |
| 49 | enum lttng_string_encodings { |
| 50 | lttng_encode_none = 0, |
| 51 | lttng_encode_UTF8 = 1, |
| 52 | lttng_encode_ASCII = 2, |
| 53 | NR_STRING_ENCODINGS, |
| 54 | }; |
| 55 | |
| 56 | enum channel_type { |
| 57 | PER_CPU_CHANNEL, |
| 58 | METADATA_CHANNEL, |
| 59 | }; |
| 60 | |
| 61 | struct lttng_enum_value { |
| 62 | unsigned long long value; |
| 63 | unsigned int signedness:1; |
| 64 | }; |
| 65 | |
| 66 | struct lttng_enum_entry { |
| 67 | struct lttng_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 | #define __type_integer(_type, _size, _alignment, _signedness, \ |
| 75 | _byte_order, _base, _encoding) \ |
| 76 | { \ |
| 77 | .atype = atype_integer, \ |
| 78 | .u.integer = \ |
| 79 | { \ |
| 80 | .size = (_size) ? : sizeof(_type) * CHAR_BIT, \ |
| 81 | .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \ |
| 82 | .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \ |
| 83 | .reverse_byte_order = _byte_order != __BYTE_ORDER, \ |
| 84 | .base = _base, \ |
| 85 | .encoding = lttng_encode_##_encoding, \ |
| 86 | }, \ |
| 87 | } \ |
| 88 | |
| 89 | struct lttng_integer_type { |
| 90 | unsigned int size; /* in bits */ |
| 91 | unsigned short alignment; /* in bits */ |
| 92 | unsigned int signedness:1, |
| 93 | reverse_byte_order:1; |
| 94 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ |
| 95 | enum lttng_string_encodings encoding; |
| 96 | }; |
| 97 | |
| 98 | struct lttng_type { |
| 99 | enum abstract_types atype; |
| 100 | union { |
| 101 | struct lttng_integer_type integer; |
| 102 | struct { |
| 103 | enum lttng_string_encodings encoding; |
| 104 | } string; |
| 105 | struct { |
| 106 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ |
| 107 | const struct lttng_type *container_type; |
| 108 | } enum_nestable; |
| 109 | struct { |
| 110 | const struct lttng_type *elem_type; |
| 111 | unsigned int length; /* Num. elems. */ |
| 112 | unsigned int alignment; |
| 113 | } array_nestable; |
| 114 | struct { |
| 115 | const char *length_name; /* Length field name. */ |
| 116 | const struct lttng_type *elem_type; |
| 117 | unsigned int alignment; /* Alignment before elements. */ |
| 118 | } sequence_nestable; |
| 119 | struct { |
| 120 | unsigned int nr_fields; |
| 121 | const struct lttng_event_field *fields; /* Array of fields. */ |
| 122 | unsigned int alignment; |
| 123 | } struct_nestable; |
| 124 | struct { |
| 125 | const char *tag_name; |
| 126 | const struct lttng_event_field *choices; /* Array of fields. */ |
| 127 | unsigned int nr_choices; |
| 128 | unsigned int alignment; |
| 129 | } variant_nestable; |
| 130 | } u; |
| 131 | }; |
| 132 | |
| 133 | struct lttng_enum_desc { |
| 134 | const char *name; |
| 135 | const struct lttng_enum_entry *entries; |
| 136 | unsigned int nr_entries; |
| 137 | }; |
| 138 | |
| 139 | /* Event field description */ |
| 140 | |
| 141 | struct lttng_event_field { |
| 142 | const char *name; |
| 143 | struct lttng_type 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 | union lttng_ctx_value { |
| 150 | int64_t s64; |
| 151 | const char *str; |
| 152 | double d; |
| 153 | }; |
| 154 | |
| 155 | /* |
| 156 | * We need to keep this perf counter field separately from struct |
| 157 | * lttng_ctx_field because cpu hotplug needs fixed-location addresses. |
| 158 | */ |
| 159 | struct lttng_perf_counter_field { |
| 160 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) |
| 161 | struct lttng_cpuhp_node cpuhp_prepare; |
| 162 | struct lttng_cpuhp_node cpuhp_online; |
| 163 | #else |
| 164 | struct notifier_block nb; |
| 165 | int hp_enable; |
| 166 | #endif |
| 167 | struct perf_event_attr *attr; |
| 168 | struct perf_event **e; /* per-cpu array */ |
| 169 | }; |
| 170 | |
| 171 | struct lttng_probe_ctx { |
| 172 | struct lttng_event *event; |
| 173 | struct lttng_event_notifier *event_notifier; // Not sure if we will ever need it. |
| 174 | uint8_t interruptible; |
| 175 | }; |
| 176 | |
| 177 | struct lttng_ctx_field { |
| 178 | struct lttng_event_field event_field; |
| 179 | size_t (*get_size)(size_t offset); |
| 180 | size_t (*get_size_arg)(size_t offset, struct lttng_ctx_field *field, |
| 181 | struct lib_ring_buffer_ctx *ctx, |
| 182 | struct lttng_channel *chan); |
| 183 | void (*record)(struct lttng_ctx_field *field, |
| 184 | struct lib_ring_buffer_ctx *ctx, |
| 185 | struct lttng_channel *chan); |
| 186 | void (*get_value)(struct lttng_ctx_field *field, |
| 187 | struct lttng_probe_ctx *lttng_probe_ctx, |
| 188 | union lttng_ctx_value *value); |
| 189 | union { |
| 190 | struct lttng_perf_counter_field *perf_counter; |
| 191 | } u; |
| 192 | void (*destroy)(struct lttng_ctx_field *field); |
| 193 | /* |
| 194 | * Private data to keep state between get_size and record. |
| 195 | * User must perform its own synchronization to protect against |
| 196 | * concurrent and reentrant contexts. |
| 197 | */ |
| 198 | void *priv; |
| 199 | }; |
| 200 | |
| 201 | struct lttng_ctx { |
| 202 | struct lttng_ctx_field *fields; |
| 203 | unsigned int nr_fields; |
| 204 | unsigned int allocated_fields; |
| 205 | size_t largest_align; /* in bytes */ |
| 206 | }; |
| 207 | |
| 208 | struct lttng_event_desc { |
| 209 | const char *name; /* lttng-modules name */ |
| 210 | const char *kname; /* Linux kernel name (tracepoints) */ |
| 211 | void *probe_callback; |
| 212 | const struct lttng_event_ctx *ctx; /* context */ |
| 213 | const struct lttng_event_field *fields; /* event payload */ |
| 214 | unsigned int nr_fields; |
| 215 | struct module *owner; |
| 216 | void *event_notifier_callback; |
| 217 | }; |
| 218 | |
| 219 | struct lttng_probe_desc { |
| 220 | const char *provider; |
| 221 | const struct lttng_event_desc **event_desc; |
| 222 | unsigned int nr_events; |
| 223 | struct list_head head; /* chain registered probes */ |
| 224 | struct list_head lazy_init_head; |
| 225 | int lazy; /* lazy registration */ |
| 226 | }; |
| 227 | |
| 228 | struct lttng_krp; /* Kretprobe handling */ |
| 229 | |
| 230 | enum lttng_event_type { |
| 231 | LTTNG_TYPE_EVENT = 0, |
| 232 | LTTNG_TYPE_ENABLER = 1, |
| 233 | }; |
| 234 | |
| 235 | struct lttng_filter_bytecode_node { |
| 236 | struct list_head node; |
| 237 | struct lttng_enabler *enabler; |
| 238 | /* |
| 239 | * struct lttng_kernel_filter_bytecode has var. sized array, must be |
| 240 | * last field. |
| 241 | */ |
| 242 | struct lttng_kernel_filter_bytecode bc; |
| 243 | }; |
| 244 | |
| 245 | /* |
| 246 | * Filter return value masks. |
| 247 | */ |
| 248 | enum lttng_filter_ret { |
| 249 | LTTNG_FILTER_DISCARD = 0, |
| 250 | LTTNG_FILTER_RECORD_FLAG = (1ULL << 0), |
| 251 | /* Other bits are kept for future use. */ |
| 252 | }; |
| 253 | |
| 254 | struct lttng_bytecode_runtime { |
| 255 | /* Associated bytecode */ |
| 256 | struct lttng_filter_bytecode_node *bc; |
| 257 | uint64_t (*filter)(void *filter_data, struct lttng_probe_ctx *lttng_probe_ctx, |
| 258 | const char *filter_stack_data); |
| 259 | int link_failed; |
| 260 | struct list_head node; /* list of bytecode runtime in event */ |
| 261 | struct lttng_ctx *ctx; |
| 262 | }; |
| 263 | |
| 264 | /* |
| 265 | * Objects in a linked-list of enablers, owned by an event. |
| 266 | */ |
| 267 | struct lttng_enabler_ref { |
| 268 | struct list_head node; /* enabler ref list */ |
| 269 | struct lttng_enabler *ref; /* backward ref */ |
| 270 | }; |
| 271 | |
| 272 | struct lttng_uprobe_handler { |
| 273 | union { |
| 274 | struct lttng_event *event; |
| 275 | struct lttng_event_notifier *event_notifier; |
| 276 | } u; |
| 277 | loff_t offset; |
| 278 | struct uprobe_consumer up_consumer; |
| 279 | struct list_head node; |
| 280 | }; |
| 281 | |
| 282 | struct lttng_kprobe { |
| 283 | struct kprobe kp; |
| 284 | char *symbol_name; |
| 285 | }; |
| 286 | |
| 287 | struct lttng_uprobe { |
| 288 | struct inode *inode; |
| 289 | struct list_head head; |
| 290 | }; |
| 291 | |
| 292 | enum lttng_syscall_entryexit { |
| 293 | LTTNG_SYSCALL_ENTRY, |
| 294 | LTTNG_SYSCALL_EXIT, |
| 295 | }; |
| 296 | |
| 297 | enum lttng_syscall_abi { |
| 298 | LTTNG_SYSCALL_ABI_NATIVE, |
| 299 | LTTNG_SYSCALL_ABI_COMPAT, |
| 300 | }; |
| 301 | |
| 302 | /* |
| 303 | * lttng_event structure is referred to by the tracing fast path. It must be |
| 304 | * kept small. |
| 305 | */ |
| 306 | struct lttng_event { |
| 307 | enum lttng_event_type evtype; /* First field. */ |
| 308 | unsigned int id; |
| 309 | struct lttng_channel *chan; |
| 310 | int enabled; |
| 311 | const struct lttng_event_desc *desc; |
| 312 | void *filter; |
| 313 | struct lttng_ctx *ctx; |
| 314 | enum lttng_kernel_instrumentation instrumentation; |
| 315 | union { |
| 316 | struct lttng_kprobe kprobe; |
| 317 | struct { |
| 318 | struct lttng_krp *lttng_krp; |
| 319 | char *symbol_name; |
| 320 | } kretprobe; |
| 321 | struct lttng_uprobe uprobe; |
| 322 | struct { |
| 323 | char *syscall_name; |
| 324 | enum lttng_syscall_entryexit entryexit; |
| 325 | enum lttng_syscall_abi abi; |
| 326 | } syscall; |
| 327 | } u; |
| 328 | struct list_head list; /* Event list in session */ |
| 329 | unsigned int metadata_dumped:1; |
| 330 | |
| 331 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
| 332 | struct list_head enablers_ref_head; |
| 333 | struct hlist_node hlist; /* session ht of events */ |
| 334 | int registered; /* has reg'd tracepoint probe */ |
| 335 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
| 336 | struct list_head bytecode_runtime_head; |
| 337 | int has_enablers_without_bytecode; |
| 338 | }; |
| 339 | |
| 340 | // FIXME: Really similar to lttng_event above. Could those be merged ? |
| 341 | struct lttng_event_notifier { |
| 342 | enum lttng_event_type evtype; /* First field. */ |
| 343 | uint64_t user_token; |
| 344 | int enabled; |
| 345 | int registered; /* has reg'd tracepoint probe */ |
| 346 | const struct lttng_event_desc *desc; |
| 347 | void *filter; |
| 348 | struct list_head list; /* event_notifier list in event_notifier group */ |
| 349 | |
| 350 | enum lttng_kernel_instrumentation instrumentation; |
| 351 | union { |
| 352 | struct lttng_kprobe kprobe; |
| 353 | struct lttng_uprobe uprobe; |
| 354 | } u; |
| 355 | |
| 356 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
| 357 | struct list_head enablers_ref_head; |
| 358 | struct hlist_node hlist; /* session ht of event_notifiers */ |
| 359 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
| 360 | struct list_head bytecode_runtime_head; |
| 361 | int has_enablers_without_bytecode; |
| 362 | |
| 363 | void (*send_notification)(struct lttng_event_notifier *event_notifier); |
| 364 | struct lttng_event_notifier_group *group; /* Weak ref */ |
| 365 | }; |
| 366 | |
| 367 | enum lttng_enabler_format_type { |
| 368 | LTTNG_ENABLER_FORMAT_STAR_GLOB, |
| 369 | LTTNG_ENABLER_FORMAT_NAME, |
| 370 | }; |
| 371 | |
| 372 | /* |
| 373 | * Enabler field, within whatever object is enabling an event. Target of |
| 374 | * backward reference. |
| 375 | */ |
| 376 | struct lttng_enabler { |
| 377 | enum lttng_event_type evtype; /* First field. */ |
| 378 | |
| 379 | enum lttng_enabler_format_type format_type; |
| 380 | |
| 381 | /* head list of struct lttng_ust_filter_bytecode_node */ |
| 382 | struct list_head filter_bytecode_head; |
| 383 | |
| 384 | struct lttng_kernel_event event_param; |
| 385 | unsigned int enabled:1; |
| 386 | |
| 387 | uint64_t user_token; /* User-provided token. */ |
| 388 | }; |
| 389 | |
| 390 | struct lttng_event_enabler { |
| 391 | struct lttng_enabler base; |
| 392 | struct list_head node; /* per-session list of enablers */ |
| 393 | struct lttng_channel *chan; |
| 394 | /* |
| 395 | * Unused, but kept around to make it explicit that the tracer can do |
| 396 | * it. |
| 397 | */ |
| 398 | struct lttng_ctx *ctx; |
| 399 | }; |
| 400 | |
| 401 | struct lttng_event_notifier_enabler { |
| 402 | struct lttng_enabler base; |
| 403 | struct list_head node; /* List of event_notifier enablers */ |
| 404 | struct lttng_event_notifier_group *group; |
| 405 | }; |
| 406 | |
| 407 | static inline |
| 408 | struct lttng_enabler *lttng_event_enabler_as_enabler( |
| 409 | struct lttng_event_enabler *event_enabler) |
| 410 | { |
| 411 | return &event_enabler->base; |
| 412 | } |
| 413 | |
| 414 | static inline |
| 415 | struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( |
| 416 | struct lttng_event_notifier_enabler *event_notifier_enabler) |
| 417 | { |
| 418 | return &event_notifier_enabler->base; |
| 419 | } |
| 420 | |
| 421 | struct lttng_channel_ops { |
| 422 | struct channel *(*channel_create)(const char *name, |
| 423 | void *priv, |
| 424 | void *buf_addr, |
| 425 | size_t subbuf_size, size_t num_subbuf, |
| 426 | unsigned int switch_timer_interval, |
| 427 | unsigned int read_timer_interval); |
| 428 | void (*channel_destroy)(struct channel *chan); |
| 429 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); |
| 430 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
| 431 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
| 432 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
| 433 | uint32_t event_id); |
| 434 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
| 435 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, |
| 436 | size_t len); |
| 437 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
| 438 | const void *src, size_t len); |
| 439 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
| 440 | int c, size_t len); |
| 441 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
| 442 | size_t len); |
| 443 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, |
| 444 | const char __user *src, size_t len); |
| 445 | /* |
| 446 | * packet_avail_size returns the available size in the current |
| 447 | * packet. Note that the size returned is only a hint, since it |
| 448 | * may change due to concurrent writes. |
| 449 | */ |
| 450 | size_t (*packet_avail_size)(struct channel *chan); |
| 451 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
| 452 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
| 453 | int (*is_finalized)(struct channel *chan); |
| 454 | int (*is_disabled)(struct channel *chan); |
| 455 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
| 456 | struct lib_ring_buffer *bufb, |
| 457 | uint64_t *timestamp_begin); |
| 458 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, |
| 459 | struct lib_ring_buffer *bufb, |
| 460 | uint64_t *timestamp_end); |
| 461 | int (*events_discarded) (const struct lib_ring_buffer_config *config, |
| 462 | struct lib_ring_buffer *bufb, |
| 463 | uint64_t *events_discarded); |
| 464 | int (*content_size) (const struct lib_ring_buffer_config *config, |
| 465 | struct lib_ring_buffer *bufb, |
| 466 | uint64_t *content_size); |
| 467 | int (*packet_size) (const struct lib_ring_buffer_config *config, |
| 468 | struct lib_ring_buffer *bufb, |
| 469 | uint64_t *packet_size); |
| 470 | int (*stream_id) (const struct lib_ring_buffer_config *config, |
| 471 | struct lib_ring_buffer *bufb, |
| 472 | uint64_t *stream_id); |
| 473 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
| 474 | struct lib_ring_buffer *bufb, |
| 475 | uint64_t *ts); |
| 476 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
| 477 | struct lib_ring_buffer *bufb, |
| 478 | uint64_t *seq); |
| 479 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
| 480 | struct lib_ring_buffer *bufb, |
| 481 | uint64_t *id); |
| 482 | }; |
| 483 | |
| 484 | struct lttng_transport { |
| 485 | char *name; |
| 486 | struct module *owner; |
| 487 | struct list_head node; |
| 488 | struct lttng_channel_ops ops; |
| 489 | }; |
| 490 | |
| 491 | struct lttng_syscall_filter; |
| 492 | |
| 493 | #define LTTNG_EVENT_HT_BITS 12 |
| 494 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) |
| 495 | |
| 496 | struct lttng_event_ht { |
| 497 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; |
| 498 | }; |
| 499 | |
| 500 | #define LTTNG_EVENT_NOTIFIER_HT_BITS 12 |
| 501 | #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS) |
| 502 | |
| 503 | struct lttng_event_notifier_ht { |
| 504 | struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE]; |
| 505 | }; |
| 506 | |
| 507 | struct lttng_channel { |
| 508 | unsigned int id; |
| 509 | struct channel *chan; /* Channel buffers */ |
| 510 | int enabled; |
| 511 | struct lttng_ctx *ctx; |
| 512 | /* Event ID management */ |
| 513 | struct lttng_session *session; |
| 514 | struct file *file; /* File associated to channel */ |
| 515 | unsigned int free_event_id; /* Next event ID to allocate */ |
| 516 | struct list_head list; /* Channel list */ |
| 517 | struct lttng_channel_ops *ops; |
| 518 | struct lttng_transport *transport; |
| 519 | struct lttng_event **sc_table; /* for syscall tracing */ |
| 520 | struct lttng_event **compat_sc_table; |
| 521 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
| 522 | struct lttng_event **compat_sc_exit_table; |
| 523 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
| 524 | struct lttng_event *sc_compat_unknown; |
| 525 | struct lttng_event *sc_exit_unknown; |
| 526 | struct lttng_event *compat_sc_exit_unknown; |
| 527 | struct lttng_syscall_filter *sc_filter; |
| 528 | int header_type; /* 0: unset, 1: compact, 2: large */ |
| 529 | enum channel_type channel_type; |
| 530 | int syscall_all; |
| 531 | unsigned int metadata_dumped:1, |
| 532 | sys_enter_registered:1, |
| 533 | sys_exit_registered:1, |
| 534 | tstate:1; /* Transient enable state */ |
| 535 | }; |
| 536 | |
| 537 | struct lttng_metadata_stream { |
| 538 | void *priv; /* Ring buffer private data */ |
| 539 | struct lttng_metadata_cache *metadata_cache; |
| 540 | unsigned int metadata_in; /* Bytes read from the cache */ |
| 541 | unsigned int metadata_out; /* Bytes consumed from stream */ |
| 542 | int finalized; /* Has channel been finalized */ |
| 543 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ |
| 544 | struct list_head list; /* Stream list */ |
| 545 | struct lttng_transport *transport; |
| 546 | uint64_t version; /* Current version of the metadata cache */ |
| 547 | bool coherent; /* Stream in a coherent state */ |
| 548 | }; |
| 549 | |
| 550 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
| 551 | |
| 552 | struct lttng_dynamic_len_stack { |
| 553 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; |
| 554 | size_t offset; |
| 555 | }; |
| 556 | |
| 557 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); |
| 558 | |
| 559 | /* |
| 560 | * struct lttng_id_tracker declared in header due to deferencing of *v |
| 561 | * in RCU_INITIALIZER(v). |
| 562 | */ |
| 563 | #define LTTNG_ID_HASH_BITS 6 |
| 564 | #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS) |
| 565 | |
| 566 | enum tracker_type { |
| 567 | TRACKER_PID, |
| 568 | TRACKER_VPID, |
| 569 | TRACKER_UID, |
| 570 | TRACKER_VUID, |
| 571 | TRACKER_GID, |
| 572 | TRACKER_VGID, |
| 573 | |
| 574 | TRACKER_UNKNOWN, |
| 575 | }; |
| 576 | |
| 577 | struct lttng_id_tracker_rcu { |
| 578 | struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE]; |
| 579 | }; |
| 580 | |
| 581 | struct lttng_id_tracker { |
| 582 | struct lttng_session *session; |
| 583 | enum tracker_type tracker_type; |
| 584 | struct lttng_id_tracker_rcu *p; /* RCU dereferenced. */ |
| 585 | }; |
| 586 | |
| 587 | struct lttng_id_hash_node { |
| 588 | struct hlist_node hlist; |
| 589 | int id; |
| 590 | }; |
| 591 | |
| 592 | struct lttng_session { |
| 593 | int active; /* Is trace session active ? */ |
| 594 | int been_active; /* Has trace session been active ? */ |
| 595 | struct file *file; /* File associated to session */ |
| 596 | struct list_head chan; /* Channel list head */ |
| 597 | struct list_head events; /* Event list head */ |
| 598 | struct list_head list; /* Session list */ |
| 599 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
| 600 | uuid_le uuid; /* Trace session unique ID */ |
| 601 | struct lttng_metadata_cache *metadata_cache; |
| 602 | struct lttng_id_tracker pid_tracker; |
| 603 | struct lttng_id_tracker vpid_tracker; |
| 604 | struct lttng_id_tracker uid_tracker; |
| 605 | struct lttng_id_tracker vuid_tracker; |
| 606 | struct lttng_id_tracker gid_tracker; |
| 607 | struct lttng_id_tracker vgid_tracker; |
| 608 | unsigned int metadata_dumped:1, |
| 609 | tstate:1; /* Transient enable state */ |
| 610 | /* List of event enablers */ |
| 611 | struct list_head enablers_head; |
| 612 | /* Hash table of events */ |
| 613 | struct lttng_event_ht events_ht; |
| 614 | char name[LTTNG_KERNEL_SESSION_NAME_LEN]; |
| 615 | char creation_time[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN]; |
| 616 | }; |
| 617 | |
| 618 | struct lttng_event_notifier_group { |
| 619 | struct file *file; /* File associated to event notifier group */ |
| 620 | struct file *notif_file; /* File used to expose notifications to userspace. */ |
| 621 | struct list_head node; /* event notifier group list */ |
| 622 | struct list_head enablers_head; /* List of enablers */ |
| 623 | struct list_head event_notifiers_head; /* List of event notifier */ |
| 624 | struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */ |
| 625 | struct lttng_ctx *ctx; /* Contexts for filters. */ |
| 626 | struct lttng_channel_ops *ops; |
| 627 | struct lttng_transport *transport; |
| 628 | struct channel *chan; /* Ring buffer channel for event notifier group. */ |
| 629 | struct lib_ring_buffer *buf; /* Ring buffer for event notifier group. */ |
| 630 | wait_queue_head_t read_wait; |
| 631 | struct irq_work wakeup_pending; /* Pending wakeup irq work. */ |
| 632 | }; |
| 633 | |
| 634 | struct lttng_metadata_cache { |
| 635 | char *data; /* Metadata cache */ |
| 636 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ |
| 637 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ |
| 638 | atomic_t producing; /* Metadata being produced (incomplete) */ |
| 639 | struct kref refcount; /* Metadata cache usage */ |
| 640 | struct list_head metadata_stream; /* Metadata stream list */ |
| 641 | uuid_le uuid; /* Trace session unique ID (copy) */ |
| 642 | struct mutex lock; /* Produce/consume lock */ |
| 643 | uint64_t version; /* Current version of the metadata */ |
| 644 | }; |
| 645 | |
| 646 | void lttng_lock_sessions(void); |
| 647 | void lttng_unlock_sessions(void); |
| 648 | |
| 649 | struct list_head *lttng_get_probe_list_head(void); |
| 650 | |
| 651 | struct lttng_event_enabler *lttng_event_enabler_create( |
| 652 | enum lttng_enabler_format_type format_type, |
| 653 | struct lttng_kernel_event *event_param, |
| 654 | struct lttng_channel *chan); |
| 655 | |
| 656 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); |
| 657 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler); |
| 658 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
| 659 | struct lttng_event_notifier_group *event_notifier_group, |
| 660 | enum lttng_enabler_format_type format_type, |
| 661 | struct lttng_kernel_event_notifier *event_notifier_param); |
| 662 | |
| 663 | int lttng_event_notifier_enabler_enable( |
| 664 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 665 | int lttng_event_notifier_enabler_disable( |
| 666 | struct lttng_event_notifier_enabler *event_notifier_enabler); |
| 667 | int lttng_fix_pending_events(void); |
| 668 | int lttng_fix_pending_event_notifiers(void); |
| 669 | int lttng_session_active(void); |
| 670 | bool lttng_event_notifier_active(void); |
| 671 | |
| 672 | struct lttng_session *lttng_session_create(void); |
| 673 | int lttng_session_enable(struct lttng_session *session); |
| 674 | int lttng_session_disable(struct lttng_session *session); |
| 675 | void lttng_session_destroy(struct lttng_session *session); |
| 676 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
| 677 | int lttng_session_statedump(struct lttng_session *session); |
| 678 | void metadata_cache_destroy(struct kref *kref); |
| 679 | |
| 680 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void); |
| 681 | void lttng_event_notifier_group_destroy( |
| 682 | struct lttng_event_notifier_group *event_notifier_group); |
| 683 | |
| 684 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
| 685 | const char *transport_name, |
| 686 | void *buf_addr, |
| 687 | size_t subbuf_size, size_t num_subbuf, |
| 688 | unsigned int switch_timer_interval, |
| 689 | unsigned int read_timer_interval, |
| 690 | enum channel_type channel_type); |
| 691 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
| 692 | int overwrite, void *buf_addr, |
| 693 | size_t subbuf_size, size_t num_subbuf, |
| 694 | unsigned int switch_timer_interval, |
| 695 | unsigned int read_timer_interval); |
| 696 | |
| 697 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
| 698 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
| 699 | struct lttng_kernel_event *event_param, |
| 700 | void *filter, |
| 701 | const struct lttng_event_desc *event_desc, |
| 702 | enum lttng_kernel_instrumentation itype); |
| 703 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
| 704 | struct lttng_kernel_event *event_param, |
| 705 | void *filter, |
| 706 | const struct lttng_event_desc *event_desc, |
| 707 | enum lttng_kernel_instrumentation itype); |
| 708 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
| 709 | struct lttng_kernel_old_event *old_event_param, |
| 710 | void *filter, |
| 711 | const struct lttng_event_desc *internal_desc); |
| 712 | |
| 713 | struct lttng_event_notifier *lttng_event_notifier_create( |
| 714 | const struct lttng_event_desc *event_notifier_desc, |
| 715 | uint64_t id, |
| 716 | struct lttng_event_notifier_group *event_notifier_group, |
| 717 | struct lttng_kernel_event_notifier *event_notifier_param, |
| 718 | void *filter, |
| 719 | enum lttng_kernel_instrumentation itype); |
| 720 | struct lttng_event_notifier *_lttng_event_notifier_create( |
| 721 | const struct lttng_event_desc *event_notifier_desc, |
| 722 | uint64_t id, |
| 723 | struct lttng_event_notifier_group *event_notifier_group, |
| 724 | struct lttng_kernel_event_notifier *event_notifier_param, |
| 725 | void *filter, |
| 726 | enum lttng_kernel_instrumentation itype); |
| 727 | |
| 728 | int lttng_channel_enable(struct lttng_channel *channel); |
| 729 | int lttng_channel_disable(struct lttng_channel *channel); |
| 730 | int lttng_event_enable(struct lttng_event *event); |
| 731 | int lttng_event_disable(struct lttng_event *event); |
| 732 | |
| 733 | int lttng_event_notifier_enable(struct lttng_event_notifier *event_notifier); |
| 734 | int lttng_event_notifier_disable(struct lttng_event_notifier *event_notifier); |
| 735 | |
| 736 | void lttng_transport_register(struct lttng_transport *transport); |
| 737 | void lttng_transport_unregister(struct lttng_transport *transport); |
| 738 | |
| 739 | void synchronize_trace(void); |
| 740 | int lttng_abi_init(void); |
| 741 | int lttng_abi_compat_old_init(void); |
| 742 | void lttng_abi_exit(void); |
| 743 | void lttng_abi_compat_old_exit(void); |
| 744 | |
| 745 | int lttng_probe_register(struct lttng_probe_desc *desc); |
| 746 | void lttng_probe_unregister(struct lttng_probe_desc *desc); |
| 747 | const struct lttng_event_desc *lttng_event_desc_get(const char *name); |
| 748 | void lttng_event_desc_put(const struct lttng_event_desc *desc); |
| 749 | int lttng_probes_init(void); |
| 750 | void lttng_probes_exit(void); |
| 751 | |
| 752 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
| 753 | struct channel *chan, bool *coherent); |
| 754 | |
| 755 | int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node); |
| 756 | int lttng_id_tracker_empty_set(struct lttng_id_tracker *lf); |
| 757 | void lttng_id_tracker_destroy(struct lttng_id_tracker *lf, bool rcu); |
| 758 | bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id); |
| 759 | int lttng_id_tracker_add(struct lttng_id_tracker *lf, int id); |
| 760 | int lttng_id_tracker_del(struct lttng_id_tracker *lf, int id); |
| 761 | |
| 762 | int lttng_session_track_id(struct lttng_session *session, |
| 763 | enum tracker_type tracker_type, int id); |
| 764 | int lttng_session_untrack_id(struct lttng_session *session, |
| 765 | enum tracker_type tracker_type, int id); |
| 766 | |
| 767 | int lttng_session_list_tracker_ids(struct lttng_session *session, |
| 768 | enum tracker_type tracker_type); |
| 769 | |
| 770 | void lttng_clock_ref(void); |
| 771 | void lttng_clock_unref(void); |
| 772 | |
| 773 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
| 774 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter); |
| 775 | int lttng_syscalls_unregister(struct lttng_channel *chan); |
| 776 | int lttng_syscalls_destroy(struct lttng_channel *chan); |
| 777 | int lttng_syscall_filter_enable(struct lttng_channel *chan, |
| 778 | struct lttng_event *event); |
| 779 | int lttng_syscall_filter_disable(struct lttng_channel *chan, |
| 780 | struct lttng_event *event); |
| 781 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 782 | struct lttng_kernel_syscall_mask __user *usyscall_mask); |
| 783 | #else |
| 784 | static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
| 785 | { |
| 786 | return -ENOSYS; |
| 787 | } |
| 788 | |
| 789 | static inline int lttng_syscalls_unregister(struct lttng_channel *chan) |
| 790 | { |
| 791 | return 0; |
| 792 | } |
| 793 | |
| 794 | static inline int lttng_syscalls_destroy(struct lttng_channel *chan) |
| 795 | { |
| 796 | return 0; |
| 797 | } |
| 798 | |
| 799 | static inline int lttng_syscall_filter_enable(struct lttng_channel *chan, |
| 800 | struct lttng_event *event); |
| 801 | { |
| 802 | return -ENOSYS; |
| 803 | } |
| 804 | |
| 805 | static inline int lttng_syscall_filter_disable(struct lttng_channel *chan, |
| 806 | struct lttng_event *event); |
| 807 | { |
| 808 | return -ENOSYS; |
| 809 | } |
| 810 | |
| 811 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 812 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
| 813 | { |
| 814 | return -ENOSYS; |
| 815 | } |
| 816 | |
| 817 | #endif |
| 818 | |
| 819 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
| 820 | int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *event_enabler, |
| 821 | struct lttng_kernel_filter_bytecode __user *bytecode); |
| 822 | int lttng_event_notifier_enabler_attach_bytecode( |
| 823 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
| 824 | struct lttng_kernel_filter_bytecode __user *bytecode); |
| 825 | |
| 826 | void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc, |
| 827 | struct lttng_ctx *ctx, |
| 828 | struct list_head *bytecode_runtime_head, |
| 829 | struct lttng_enabler *enabler); |
| 830 | |
| 831 | int lttng_probes_init(void); |
| 832 | |
| 833 | extern struct lttng_ctx *lttng_static_ctx; |
| 834 | |
| 835 | int lttng_context_init(void); |
| 836 | void lttng_context_exit(void); |
| 837 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
| 838 | ssize_t lttng_append_context_index(struct lttng_ctx **ctx_p); |
| 839 | struct lttng_ctx_field *lttng_get_context_field_from_index(struct lttng_ctx *ctx, |
| 840 | size_t index); |
| 841 | void lttng_context_update(struct lttng_ctx *ctx); |
| 842 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
| 843 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
| 844 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
| 845 | struct lttng_ctx_field *field); |
| 846 | void lttng_remove_context_field_index(struct lttng_ctx **ctx_p, size_t index); |
| 847 | void lttng_destroy_context(struct lttng_ctx *ctx); |
| 848 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
| 849 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
| 850 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
| 851 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
| 852 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
| 853 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
| 854 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); |
| 855 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); |
| 856 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); |
| 857 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); |
| 858 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
| 859 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
| 860 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); |
| 861 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) |
| 862 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); |
| 863 | #else |
| 864 | static inline |
| 865 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) |
| 866 | { |
| 867 | return -ENOSYS; |
| 868 | } |
| 869 | #endif |
| 870 | #ifdef CONFIG_PREEMPT_RT_FULL |
| 871 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); |
| 872 | #else |
| 873 | static inline |
| 874 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) |
| 875 | { |
| 876 | return -ENOSYS; |
| 877 | } |
| 878 | #endif |
| 879 | |
| 880 | int lttng_add_callstack_to_ctx(struct lttng_ctx **ctx, int type); |
| 881 | |
| 882 | #if defined(CONFIG_CGROUPS) && \ |
| 883 | ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \ |
| 884 | LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0)) |
| 885 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx); |
| 886 | #else |
| 887 | static inline |
| 888 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx) |
| 889 | { |
| 890 | return -ENOSYS; |
| 891 | } |
| 892 | #endif |
| 893 | |
| 894 | #if defined(CONFIG_IPC_NS) && \ |
| 895 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) |
| 896 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx); |
| 897 | #else |
| 898 | static inline |
| 899 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx) |
| 900 | { |
| 901 | return -ENOSYS; |
| 902 | } |
| 903 | #endif |
| 904 | |
| 905 | #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \ |
| 906 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) |
| 907 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx); |
| 908 | #else |
| 909 | static inline |
| 910 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx) |
| 911 | { |
| 912 | return -ENOSYS; |
| 913 | } |
| 914 | #endif |
| 915 | |
| 916 | #if defined(CONFIG_NET_NS) && \ |
| 917 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) |
| 918 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx); |
| 919 | #else |
| 920 | static inline |
| 921 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx) |
| 922 | { |
| 923 | return -ENOSYS; |
| 924 | } |
| 925 | #endif |
| 926 | |
| 927 | #if defined(CONFIG_PID_NS) && \ |
| 928 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) |
| 929 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx); |
| 930 | #else |
| 931 | static inline |
| 932 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx) |
| 933 | { |
| 934 | return -ENOSYS; |
| 935 | } |
| 936 | #endif |
| 937 | |
| 938 | #if defined(CONFIG_USER_NS) && \ |
| 939 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) |
| 940 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx); |
| 941 | #else |
| 942 | static inline |
| 943 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx) |
| 944 | { |
| 945 | return -ENOSYS; |
| 946 | } |
| 947 | #endif |
| 948 | |
| 949 | #if defined(CONFIG_UTS_NS) && \ |
| 950 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) |
| 951 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx); |
| 952 | #else |
| 953 | static inline |
| 954 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx) |
| 955 | { |
| 956 | return -ENOSYS; |
| 957 | } |
| 958 | #endif |
| 959 | |
| 960 | #if defined(CONFIG_TIME_NS) && \ |
| 961 | (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) |
| 962 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx); |
| 963 | #else |
| 964 | static inline |
| 965 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx) |
| 966 | { |
| 967 | return -ENOSYS; |
| 968 | } |
| 969 | #endif |
| 970 | |
| 971 | int lttng_add_uid_to_ctx(struct lttng_ctx **ctx); |
| 972 | int lttng_add_euid_to_ctx(struct lttng_ctx **ctx); |
| 973 | int lttng_add_suid_to_ctx(struct lttng_ctx **ctx); |
| 974 | int lttng_add_gid_to_ctx(struct lttng_ctx **ctx); |
| 975 | int lttng_add_egid_to_ctx(struct lttng_ctx **ctx); |
| 976 | int lttng_add_sgid_to_ctx(struct lttng_ctx **ctx); |
| 977 | int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); |
| 978 | int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); |
| 979 | int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); |
| 980 | int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); |
| 981 | int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); |
| 982 | int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); |
| 983 | |
| 984 | #if defined(CONFIG_PERF_EVENTS) |
| 985 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 986 | uint64_t config, |
| 987 | const char *name, |
| 988 | struct lttng_ctx **ctx); |
| 989 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 990 | struct lttng_cpuhp_node *node); |
| 991 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 992 | struct lttng_cpuhp_node *node); |
| 993 | #else |
| 994 | static inline |
| 995 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 996 | uint64_t config, |
| 997 | const char *name, |
| 998 | struct lttng_ctx **ctx) |
| 999 | { |
| 1000 | return -ENOSYS; |
| 1001 | } |
| 1002 | static inline |
| 1003 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 1004 | struct lttng_cpuhp_node *node) |
| 1005 | { |
| 1006 | return 0; |
| 1007 | } |
| 1008 | static inline |
| 1009 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 1010 | struct lttng_cpuhp_node *node) |
| 1011 | { |
| 1012 | return 0; |
| 1013 | } |
| 1014 | #endif |
| 1015 | |
| 1016 | int lttng_logger_init(void); |
| 1017 | void lttng_logger_exit(void); |
| 1018 | |
| 1019 | extern int lttng_statedump_start(struct lttng_session *session); |
| 1020 | |
| 1021 | #ifdef CONFIG_KPROBES |
| 1022 | int lttng_kprobes_register_event(const char *name, |
| 1023 | const char *symbol_name, |
| 1024 | uint64_t offset, |
| 1025 | uint64_t addr, |
| 1026 | struct lttng_event *event); |
| 1027 | void lttng_kprobes_unregister_event(struct lttng_event *event); |
| 1028 | void lttng_kprobes_destroy_event_private(struct lttng_event *event); |
| 1029 | int lttng_kprobes_register_event_notifier(const char *symbol_name, |
| 1030 | uint64_t offset, |
| 1031 | uint64_t addr, |
| 1032 | struct lttng_event_notifier *event_notifier); |
| 1033 | void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier); |
| 1034 | void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier); |
| 1035 | #else |
| 1036 | static inline |
| 1037 | int lttng_kprobes_register_event(const char *name, |
| 1038 | const char *symbol_name, |
| 1039 | uint64_t offset, |
| 1040 | uint64_t addr, |
| 1041 | struct lttng_event *event) |
| 1042 | { |
| 1043 | return -ENOSYS; |
| 1044 | } |
| 1045 | |
| 1046 | static inline |
| 1047 | void lttng_kprobes_unregister_event(struct lttng_event *event) |
| 1048 | { |
| 1049 | } |
| 1050 | |
| 1051 | static inline |
| 1052 | void lttng_kprobes_destroy_event_private(struct lttng_event *event) |
| 1053 | { |
| 1054 | } |
| 1055 | |
| 1056 | static inline |
| 1057 | int lttng_kprobes_register_event_notifier(const char *symbol_name, |
| 1058 | uint64_t offset, |
| 1059 | uint64_t addr, |
| 1060 | struct lttng_event_notifier *event_notifier) |
| 1061 | { |
| 1062 | return -ENOSYS; |
| 1063 | } |
| 1064 | |
| 1065 | static inline |
| 1066 | void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier) |
| 1067 | { |
| 1068 | } |
| 1069 | |
| 1070 | static inline |
| 1071 | void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier) |
| 1072 | { |
| 1073 | } |
| 1074 | #endif |
| 1075 | |
| 1076 | int lttng_event_add_callsite(struct lttng_event *event, |
| 1077 | struct lttng_kernel_event_callsite *callsite); |
| 1078 | |
| 1079 | int lttng_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, |
| 1080 | struct lttng_kernel_event_callsite *callsite); |
| 1081 | |
| 1082 | #ifdef CONFIG_UPROBES |
| 1083 | int lttng_uprobes_register_event(const char *name, |
| 1084 | int fd, struct lttng_event *event); |
| 1085 | int lttng_uprobes_event_add_callsite(struct lttng_event *event, |
| 1086 | struct lttng_kernel_event_callsite *callsite); |
| 1087 | void lttng_uprobes_unregister_event(struct lttng_event *event); |
| 1088 | void lttng_uprobes_destroy_event_private(struct lttng_event *event); |
| 1089 | int lttng_uprobes_register_event_notifier(const char *name, |
| 1090 | int fd, struct lttng_event_notifier *event_notifier); |
| 1091 | int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, |
| 1092 | struct lttng_kernel_event_callsite *callsite); |
| 1093 | void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier); |
| 1094 | void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier); |
| 1095 | #else |
| 1096 | static inline |
| 1097 | int lttng_uprobes_register_event(const char *name, |
| 1098 | int fd, struct lttng_event *event) |
| 1099 | { |
| 1100 | return -ENOSYS; |
| 1101 | } |
| 1102 | |
| 1103 | static inline |
| 1104 | int lttng_uprobes_event_add_callsite(struct lttng_event *event, |
| 1105 | struct lttng_kernel_event_callsite *callsite) |
| 1106 | { |
| 1107 | return -ENOSYS; |
| 1108 | } |
| 1109 | |
| 1110 | static inline |
| 1111 | void lttng_uprobes_unregister_event(struct lttng_event *event) |
| 1112 | { |
| 1113 | } |
| 1114 | |
| 1115 | static inline |
| 1116 | void lttng_uprobes_destroy_event_private(struct lttng_event *event) |
| 1117 | { |
| 1118 | } |
| 1119 | |
| 1120 | static inline |
| 1121 | int lttng_uprobes_register_event_notifier(const char *name, |
| 1122 | int fd, struct lttng_event_notifier *event_notifier) |
| 1123 | { |
| 1124 | return -ENOSYS; |
| 1125 | } |
| 1126 | |
| 1127 | static inline |
| 1128 | int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, |
| 1129 | struct lttng_kernel_event_callsite *callsite) |
| 1130 | { |
| 1131 | return -ENOSYS; |
| 1132 | } |
| 1133 | |
| 1134 | static inline |
| 1135 | void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier) |
| 1136 | { |
| 1137 | } |
| 1138 | |
| 1139 | static inline |
| 1140 | void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier) |
| 1141 | { |
| 1142 | } |
| 1143 | #endif |
| 1144 | |
| 1145 | #ifdef CONFIG_KRETPROBES |
| 1146 | int lttng_kretprobes_register(const char *name, |
| 1147 | const char *symbol_name, |
| 1148 | uint64_t offset, |
| 1149 | uint64_t addr, |
| 1150 | struct lttng_event *event_entry, |
| 1151 | struct lttng_event *event_exit); |
| 1152 | void lttng_kretprobes_unregister(struct lttng_event *event); |
| 1153 | void lttng_kretprobes_destroy_private(struct lttng_event *event); |
| 1154 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
| 1155 | int enable); |
| 1156 | #else |
| 1157 | static inline |
| 1158 | int lttng_kretprobes_register(const char *name, |
| 1159 | const char *symbol_name, |
| 1160 | uint64_t offset, |
| 1161 | uint64_t addr, |
| 1162 | struct lttng_event *event_entry, |
| 1163 | struct lttng_event *event_exit) |
| 1164 | { |
| 1165 | return -ENOSYS; |
| 1166 | } |
| 1167 | |
| 1168 | static inline |
| 1169 | void lttng_kretprobes_unregister(struct lttng_event *event) |
| 1170 | { |
| 1171 | } |
| 1172 | |
| 1173 | static inline |
| 1174 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
| 1175 | { |
| 1176 | } |
| 1177 | |
| 1178 | static inline |
| 1179 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
| 1180 | int enable) |
| 1181 | { |
| 1182 | return -ENOSYS; |
| 1183 | } |
| 1184 | #endif |
| 1185 | |
| 1186 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
| 1187 | |
| 1188 | extern const struct file_operations lttng_tracepoint_list_fops; |
| 1189 | extern const struct file_operations lttng_syscall_list_fops; |
| 1190 | |
| 1191 | #define TRACEPOINT_HAS_DATA_ARG |
| 1192 | |
| 1193 | static inline bool lttng_is_bytewise_integer(const struct lttng_type *type) |
| 1194 | { |
| 1195 | if (type->atype != atype_integer) |
| 1196 | return false; |
| 1197 | switch (type->u.integer.size) { |
| 1198 | case 8: /* Fall-through. */ |
| 1199 | case 16: /* Fall-through. */ |
| 1200 | case 32: /* Fall-through. */ |
| 1201 | case 64: |
| 1202 | break; |
| 1203 | default: |
| 1204 | return false; |
| 1205 | } |
| 1206 | return true; |
| 1207 | } |
| 1208 | |
| 1209 | #endif /* _LTTNG_EVENTS_H */ |