| 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 <wrapper/compiler_attributes.h> |
| 12 | |
| 13 | #include <lttng/events.h> |
| 14 | |
| 15 | struct lttng_syscall_filter; |
| 16 | struct lttng_metadata_cache; |
| 17 | struct perf_event; |
| 18 | struct perf_event_attr; |
| 19 | struct lttng_kernel_ring_buffer_config; |
| 20 | |
| 21 | enum lttng_enabler_format_type { |
| 22 | LTTNG_ENABLER_FORMAT_STAR_GLOB, |
| 23 | LTTNG_ENABLER_FORMAT_NAME, |
| 24 | }; |
| 25 | |
| 26 | enum channel_type { |
| 27 | PER_CPU_CHANNEL, |
| 28 | METADATA_CHANNEL, |
| 29 | }; |
| 30 | |
| 31 | /* |
| 32 | * Objects in a linked-list of enablers, owned by an event. |
| 33 | */ |
| 34 | struct lttng_enabler_ref { |
| 35 | struct list_head node; /* enabler ref list */ |
| 36 | struct lttng_event_enabler_common *ref; /* backward ref */ |
| 37 | }; |
| 38 | |
| 39 | struct lttng_krp; /* Kretprobe handling */ |
| 40 | |
| 41 | struct lttng_uprobe_handler { |
| 42 | struct lttng_kernel_event_common *event; |
| 43 | loff_t offset; |
| 44 | struct uprobe_consumer up_consumer; |
| 45 | struct list_head node; |
| 46 | }; |
| 47 | |
| 48 | struct lttng_kprobe { |
| 49 | struct kprobe kp; |
| 50 | char *symbol_name; |
| 51 | }; |
| 52 | |
| 53 | struct lttng_uprobe { |
| 54 | struct inode *inode; |
| 55 | struct list_head head; |
| 56 | }; |
| 57 | |
| 58 | enum lttng_syscall_entryexit { |
| 59 | LTTNG_SYSCALL_ENTRY, |
| 60 | LTTNG_SYSCALL_EXIT, |
| 61 | }; |
| 62 | |
| 63 | enum lttng_syscall_abi { |
| 64 | LTTNG_SYSCALL_ABI_NATIVE, |
| 65 | LTTNG_SYSCALL_ABI_COMPAT, |
| 66 | }; |
| 67 | |
| 68 | struct lttng_kernel_event_common_private { |
| 69 | struct lttng_kernel_event_common *pub; /* Public event interface */ |
| 70 | |
| 71 | const struct lttng_kernel_event_desc *desc; |
| 72 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
| 73 | struct list_head enablers_ref_head; |
| 74 | int registered; /* has reg'd tracepoint probe */ |
| 75 | uint64_t user_token; |
| 76 | |
| 77 | int has_enablers_without_filter_bytecode; |
| 78 | /* list of struct lttng_kernel_bytecode_runtime, sorted by seqnum */ |
| 79 | struct list_head filter_bytecode_runtime_head; |
| 80 | enum lttng_kernel_abi_instrumentation instrumentation; |
| 81 | /* Selected by instrumentation */ |
| 82 | union { |
| 83 | struct lttng_kprobe kprobe; |
| 84 | struct lttng_uprobe uprobe; |
| 85 | struct { |
| 86 | struct lttng_krp *lttng_krp; |
| 87 | char *symbol_name; |
| 88 | } kretprobe; |
| 89 | struct { |
| 90 | enum lttng_syscall_entryexit entryexit; |
| 91 | enum lttng_syscall_abi abi; |
| 92 | struct hlist_node node; /* chain registered syscall event_notifier */ |
| 93 | unsigned int syscall_id; |
| 94 | } syscall; |
| 95 | } u; |
| 96 | }; |
| 97 | |
| 98 | struct lttng_kernel_event_recorder_private { |
| 99 | struct lttng_kernel_event_common_private parent; |
| 100 | |
| 101 | struct lttng_kernel_event_recorder *pub; /* Public event interface */ |
| 102 | struct list_head node; /* Event recorder list */ |
| 103 | struct hlist_node hlist; /* Hash table of event recorders */ |
| 104 | struct lttng_kernel_ctx *ctx; |
| 105 | unsigned int id; |
| 106 | unsigned int metadata_dumped:1; |
| 107 | }; |
| 108 | |
| 109 | struct lttng_kernel_event_notifier_private { |
| 110 | struct lttng_kernel_event_common_private parent; |
| 111 | |
| 112 | struct lttng_kernel_event_notifier *pub; /* Public event notifier interface */ |
| 113 | struct lttng_event_notifier_group *group; /* weak ref */ |
| 114 | size_t num_captures; /* Needed to allocate the msgpack array. */ |
| 115 | uint64_t error_counter_index; |
| 116 | struct list_head node; /* Event notifier list */ |
| 117 | struct hlist_node hlist; /* Hash table of event notifiers */ |
| 118 | struct list_head capture_bytecode_runtime_head; |
| 119 | |
| 120 | }; |
| 121 | |
| 122 | struct lttng_kernel_syscall_table { |
| 123 | unsigned int sys_enter_registered:1, |
| 124 | sys_exit_registered:1; |
| 125 | |
| 126 | struct hlist_head *syscall_dispatch; /* for syscall tracing */ |
| 127 | struct hlist_head *compat_syscall_dispatch; |
| 128 | struct hlist_head *syscall_exit_dispatch; /* for syscall exit tracing */ |
| 129 | struct hlist_head *compat_syscall_exit_dispatch; |
| 130 | |
| 131 | /* |
| 132 | * Combining all unknown syscall events works as long as they |
| 133 | * are only matched by "all" syscalls enablers, but will require |
| 134 | * a design change when we allow matching by syscall number, for |
| 135 | * instance by allocating sc_tables accomodating NR_syscalls |
| 136 | * entries. |
| 137 | */ |
| 138 | struct hlist_head unknown_syscall_dispatch; /* for unknown syscalls */ |
| 139 | struct hlist_head compat_unknown_syscall_dispatch; |
| 140 | struct hlist_head unknown_syscall_exit_dispatch; |
| 141 | struct hlist_head compat_unknown_syscall_exit_dispatch; |
| 142 | |
| 143 | struct lttng_syscall_filter *sc_filter; |
| 144 | int syscall_all_entry; |
| 145 | int syscall_all_exit; |
| 146 | }; |
| 147 | |
| 148 | struct lttng_kernel_channel_common_private { |
| 149 | struct lttng_kernel_channel_common *pub; |
| 150 | |
| 151 | struct file *file; /* File associated to channel */ |
| 152 | unsigned int tstate:1; /* Transient enable state */ |
| 153 | |
| 154 | struct lttng_kernel_syscall_table syscall_table; |
| 155 | }; |
| 156 | |
| 157 | struct lttng_kernel_channel_buffer_private { |
| 158 | struct lttng_kernel_channel_common_private parent; |
| 159 | |
| 160 | struct lttng_kernel_channel_buffer *pub; |
| 161 | |
| 162 | unsigned int id; /* Channel ID */ |
| 163 | unsigned int free_event_id; /* Next event ID to allocate */ |
| 164 | int header_type; /* 0: unset, 1: compact, 2: large */ |
| 165 | |
| 166 | enum channel_type channel_type; |
| 167 | struct lttng_kernel_ctx *ctx; |
| 168 | struct lttng_kernel_ring_buffer_channel *rb_chan; /* Ring buffer channel */ |
| 169 | unsigned int metadata_dumped:1; |
| 170 | struct list_head node; /* Channel list in session */ |
| 171 | struct lttng_transport *transport; |
| 172 | }; |
| 173 | |
| 174 | enum lttng_kernel_bytecode_interpreter_ret { |
| 175 | LTTNG_KERNEL_BYTECODE_INTERPRETER_ERROR = -1, |
| 176 | LTTNG_KERNEL_BYTECODE_INTERPRETER_OK = 0, |
| 177 | }; |
| 178 | |
| 179 | enum lttng_kernel_bytecode_filter_result { |
| 180 | LTTNG_KERNEL_BYTECODE_FILTER_ACCEPT = 0, |
| 181 | LTTNG_KERNEL_BYTECODE_FILTER_REJECT = 1, |
| 182 | }; |
| 183 | |
| 184 | struct lttng_kernel_bytecode_filter_ctx { |
| 185 | enum lttng_kernel_bytecode_filter_result result; |
| 186 | }; |
| 187 | |
| 188 | struct lttng_interpreter_output; |
| 189 | |
| 190 | enum lttng_kernel_bytecode_type { |
| 191 | LTTNG_KERNEL_BYTECODE_TYPE_FILTER, |
| 192 | LTTNG_KERNEL_BYTECODE_TYPE_CAPTURE, |
| 193 | }; |
| 194 | |
| 195 | enum lttng_kernel_event_enabler_type { |
| 196 | LTTNG_EVENT_ENABLER_TYPE_RECORDER, |
| 197 | LTTNG_EVENT_ENABLER_TYPE_NOTIFIER, |
| 198 | }; |
| 199 | |
| 200 | struct lttng_kernel_bytecode_node { |
| 201 | enum lttng_kernel_bytecode_type type; |
| 202 | struct list_head node; |
| 203 | struct lttng_event_enabler_common *enabler; |
| 204 | struct { |
| 205 | uint32_t len; |
| 206 | uint32_t reloc_offset; |
| 207 | uint64_t seqnum; |
| 208 | char data[]; |
| 209 | } bc; |
| 210 | }; |
| 211 | |
| 212 | struct lttng_kernel_bytecode_runtime { |
| 213 | /* Associated bytecode */ |
| 214 | enum lttng_kernel_bytecode_type type; |
| 215 | struct lttng_kernel_bytecode_node *bc; |
| 216 | int (*interpreter_func)(struct lttng_kernel_bytecode_runtime *kernel_bytecode, |
| 217 | const char *interpreter_stack_data, |
| 218 | struct lttng_kernel_probe_ctx *lttng_probe_ctx, |
| 219 | void *caller_ctx); |
| 220 | int link_failed; |
| 221 | struct list_head node; /* list of bytecode runtime in event */ |
| 222 | struct lttng_kernel_ctx *ctx; |
| 223 | }; |
| 224 | |
| 225 | /* |
| 226 | * Enabler field, within whatever object is enabling an event. Target of |
| 227 | * backward reference. |
| 228 | */ |
| 229 | struct lttng_event_enabler_common { |
| 230 | enum lttng_kernel_event_enabler_type enabler_type; |
| 231 | enum lttng_enabler_format_type format_type; |
| 232 | |
| 233 | /* head list of struct lttng_kernel_bytecode_node */ |
| 234 | struct list_head filter_bytecode_head; |
| 235 | |
| 236 | struct lttng_kernel_abi_event event_param; |
| 237 | unsigned int enabled:1; |
| 238 | |
| 239 | uint64_t user_token; /* User-provided token. */ |
| 240 | }; |
| 241 | |
| 242 | struct lttng_event_recorder_enabler { |
| 243 | struct lttng_event_enabler_common parent; |
| 244 | struct list_head node; /* per-session list of enablers */ |
| 245 | bool published; /* published in per-session list. */ |
| 246 | struct lttng_kernel_channel_buffer *chan; |
| 247 | }; |
| 248 | |
| 249 | struct lttng_event_notifier_enabler { |
| 250 | struct lttng_event_enabler_common parent; |
| 251 | uint64_t error_counter_index; |
| 252 | struct list_head node; /* List of event_notifier enablers */ |
| 253 | struct lttng_event_notifier_group *group; |
| 254 | |
| 255 | /* head list of struct lttng_kernel_bytecode_node */ |
| 256 | struct list_head capture_bytecode_head; |
| 257 | uint64_t num_captures; |
| 258 | }; |
| 259 | |
| 260 | struct lttng_ctx_value { |
| 261 | union { |
| 262 | int64_t s64; |
| 263 | const char *str; |
| 264 | double d; |
| 265 | } u; |
| 266 | }; |
| 267 | |
| 268 | /* |
| 269 | * We need to keep this perf counter field separately from struct |
| 270 | * lttng_kernel_ctx_field because cpu hotplug needs fixed-location addresses. |
| 271 | */ |
| 272 | struct lttng_perf_counter_field { |
| 273 | #if (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,10,0)) |
| 274 | struct lttng_cpuhp_node cpuhp_prepare; |
| 275 | struct lttng_cpuhp_node cpuhp_online; |
| 276 | #else |
| 277 | struct notifier_block nb; |
| 278 | int hp_enable; |
| 279 | #endif |
| 280 | struct perf_event_attr *attr; |
| 281 | struct perf_event **e; /* per-cpu array */ |
| 282 | char *name; |
| 283 | struct lttng_kernel_event_field *event_field; |
| 284 | }; |
| 285 | |
| 286 | struct lttng_kernel_ctx_field { |
| 287 | const struct lttng_kernel_event_field *event_field; |
| 288 | size_t (*get_size)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 289 | size_t offset); |
| 290 | void (*record)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 291 | struct lttng_kernel_ring_buffer_ctx *ctx, |
| 292 | struct lttng_kernel_channel_buffer *chan); |
| 293 | void (*get_value)(void *priv, struct lttng_kernel_probe_ctx *probe_ctx, |
| 294 | struct lttng_ctx_value *value); |
| 295 | void (*destroy)(void *priv); |
| 296 | void *priv; |
| 297 | }; |
| 298 | |
| 299 | struct lttng_kernel_ctx { |
| 300 | struct lttng_kernel_ctx_field *fields; |
| 301 | unsigned int nr_fields; |
| 302 | unsigned int allocated_fields; |
| 303 | size_t largest_align; /* in bytes */ |
| 304 | }; |
| 305 | |
| 306 | struct lttng_metadata_cache { |
| 307 | char *data; /* Metadata cache */ |
| 308 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ |
| 309 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ |
| 310 | atomic_t producing; /* Metadata being produced (incomplete) */ |
| 311 | struct kref refcount; /* Metadata cache usage */ |
| 312 | struct list_head metadata_stream; /* Metadata stream list */ |
| 313 | uuid_le uuid; /* Trace session unique ID (copy) */ |
| 314 | struct mutex lock; /* Produce/consume lock */ |
| 315 | uint64_t version; /* Current version of the metadata */ |
| 316 | }; |
| 317 | |
| 318 | struct lttng_metadata_stream { |
| 319 | void *priv; /* Ring buffer private data */ |
| 320 | struct lttng_metadata_cache *metadata_cache; |
| 321 | unsigned int metadata_in; /* Bytes read from the cache */ |
| 322 | unsigned int metadata_out; /* Bytes consumed from stream */ |
| 323 | int finalized; /* Has channel been finalized */ |
| 324 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ |
| 325 | struct list_head list; /* Stream list */ |
| 326 | struct lttng_transport *transport; |
| 327 | uint64_t version; /* Current version of the metadata cache */ |
| 328 | bool coherent; /* Stream in a coherent state */ |
| 329 | }; |
| 330 | |
| 331 | struct lttng_kernel_channel_buffer_ops_private { |
| 332 | struct lttng_kernel_channel_buffer_ops *pub; /* Public channel buffer ops interface */ |
| 333 | |
| 334 | struct lttng_kernel_ring_buffer_channel *(*channel_create)(const char *name, |
| 335 | void *priv, |
| 336 | void *buf_addr, |
| 337 | size_t subbuf_size, size_t num_subbuf, |
| 338 | unsigned int switch_timer_interval, |
| 339 | unsigned int read_timer_interval); |
| 340 | void (*channel_destroy)(struct lttng_kernel_ring_buffer_channel *chan); |
| 341 | struct lttng_kernel_ring_buffer *(*buffer_read_open)(struct lttng_kernel_ring_buffer_channel *chan); |
| 342 | int (*buffer_has_read_closed_stream)(struct lttng_kernel_ring_buffer_channel *chan); |
| 343 | void (*buffer_read_close)(struct lttng_kernel_ring_buffer *buf); |
| 344 | /* |
| 345 | * packet_avail_size returns the available size in the current |
| 346 | * packet. Note that the size returned is only a hint, since it |
| 347 | * may change due to concurrent writes. |
| 348 | */ |
| 349 | size_t (*packet_avail_size)(struct lttng_kernel_ring_buffer_channel *chan); |
| 350 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct lttng_kernel_ring_buffer_channel *chan, int cpu); |
| 351 | wait_queue_head_t *(*get_hp_wait_queue)(struct lttng_kernel_ring_buffer_channel *chan); |
| 352 | int (*is_finalized)(struct lttng_kernel_ring_buffer_channel *chan); |
| 353 | int (*is_disabled)(struct lttng_kernel_ring_buffer_channel *chan); |
| 354 | int (*timestamp_begin) (const struct lttng_kernel_ring_buffer_config *config, |
| 355 | struct lttng_kernel_ring_buffer *bufb, |
| 356 | uint64_t *timestamp_begin); |
| 357 | int (*timestamp_end) (const struct lttng_kernel_ring_buffer_config *config, |
| 358 | struct lttng_kernel_ring_buffer *bufb, |
| 359 | uint64_t *timestamp_end); |
| 360 | int (*events_discarded) (const struct lttng_kernel_ring_buffer_config *config, |
| 361 | struct lttng_kernel_ring_buffer *bufb, |
| 362 | uint64_t *events_discarded); |
| 363 | int (*content_size) (const struct lttng_kernel_ring_buffer_config *config, |
| 364 | struct lttng_kernel_ring_buffer *bufb, |
| 365 | uint64_t *content_size); |
| 366 | int (*packet_size) (const struct lttng_kernel_ring_buffer_config *config, |
| 367 | struct lttng_kernel_ring_buffer *bufb, |
| 368 | uint64_t *packet_size); |
| 369 | int (*stream_id) (const struct lttng_kernel_ring_buffer_config *config, |
| 370 | struct lttng_kernel_ring_buffer *bufb, |
| 371 | uint64_t *stream_id); |
| 372 | int (*current_timestamp) (const struct lttng_kernel_ring_buffer_config *config, |
| 373 | struct lttng_kernel_ring_buffer *bufb, |
| 374 | uint64_t *ts); |
| 375 | int (*sequence_number) (const struct lttng_kernel_ring_buffer_config *config, |
| 376 | struct lttng_kernel_ring_buffer *bufb, |
| 377 | uint64_t *seq); |
| 378 | int (*instance_id) (const struct lttng_kernel_ring_buffer_config *config, |
| 379 | struct lttng_kernel_ring_buffer *bufb, |
| 380 | uint64_t *id); |
| 381 | }; |
| 382 | |
| 383 | struct lttng_counter_ops { |
| 384 | struct lib_counter *(*counter_create)(size_t nr_dimensions, |
| 385 | const size_t *max_nr_elem, /* for each dimension */ |
| 386 | int64_t global_sum_step); |
| 387 | void (*counter_destroy)(struct lib_counter *counter); |
| 388 | int (*counter_add)(struct lib_counter *counter, const size_t *dimension_indexes, |
| 389 | int64_t v); |
| 390 | /* |
| 391 | * counter_read reads a specific cpu's counter if @cpu >= 0, or |
| 392 | * the global aggregation counter if @cpu == -1. |
| 393 | */ |
| 394 | int (*counter_read)(struct lib_counter *counter, const size_t *dimension_indexes, int cpu, |
| 395 | int64_t *value, bool *overflow, bool *underflow); |
| 396 | /* |
| 397 | * counter_aggregate returns the total sum of all per-cpu counters and |
| 398 | * the global aggregation counter. |
| 399 | */ |
| 400 | int (*counter_aggregate)(struct lib_counter *counter, const size_t *dimension_indexes, |
| 401 | int64_t *value, bool *overflow, bool *underflow); |
| 402 | int (*counter_clear)(struct lib_counter *counter, const size_t *dimension_indexes); |
| 403 | }; |
| 404 | |
| 405 | struct lttng_counter { |
| 406 | struct file *file; /* File associated to counter. */ |
| 407 | struct file *owner; |
| 408 | struct lttng_counter_transport *transport; |
| 409 | struct lib_counter *counter; |
| 410 | struct lttng_counter_ops *ops; |
| 411 | }; |
| 412 | |
| 413 | #define LTTNG_EVENT_NOTIFIER_HT_BITS 12 |
| 414 | #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS) |
| 415 | |
| 416 | struct lttng_event_notifier_ht { |
| 417 | struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE]; |
| 418 | }; |
| 419 | |
| 420 | struct lttng_event_notifier_group { |
| 421 | struct file *file; /* File associated to event notifier group */ |
| 422 | struct file *notif_file; /* File used to expose notifications to userspace. */ |
| 423 | struct list_head node; /* event notifier group list */ |
| 424 | struct list_head enablers_head; /* List of enablers */ |
| 425 | struct list_head event_notifiers_head; /* List of event notifier */ |
| 426 | struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */ |
| 427 | struct lttng_kernel_channel_buffer_ops *ops; |
| 428 | struct lttng_transport *transport; |
| 429 | struct lttng_kernel_ring_buffer_channel *chan; /* Ring buffer channel for event notifier group. */ |
| 430 | struct lttng_kernel_ring_buffer *buf; /* Ring buffer for event notifier group. */ |
| 431 | wait_queue_head_t read_wait; |
| 432 | struct irq_work wakeup_pending; /* Pending wakeup irq work. */ |
| 433 | |
| 434 | struct lttng_kernel_syscall_table syscall_table; |
| 435 | |
| 436 | struct lttng_counter *error_counter; |
| 437 | size_t error_counter_len; |
| 438 | }; |
| 439 | |
| 440 | struct lttng_transport { |
| 441 | char *name; |
| 442 | struct module *owner; |
| 443 | struct list_head node; |
| 444 | struct lttng_kernel_channel_buffer_ops ops; |
| 445 | }; |
| 446 | |
| 447 | struct lttng_counter_transport { |
| 448 | char *name; |
| 449 | struct module *owner; |
| 450 | struct list_head node; |
| 451 | struct lttng_counter_ops ops; |
| 452 | }; |
| 453 | |
| 454 | #define LTTNG_EVENT_HT_BITS 12 |
| 455 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) |
| 456 | |
| 457 | struct lttng_event_ht { |
| 458 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; |
| 459 | }; |
| 460 | |
| 461 | struct lttng_kernel_session_private { |
| 462 | struct lttng_kernel_session *pub; /* Public session interface */ |
| 463 | |
| 464 | int been_active; /* Has trace session been active ? */ |
| 465 | struct file *file; /* File associated to session */ |
| 466 | struct list_head chan; /* Channel list head */ |
| 467 | struct list_head events; /* Event list head */ |
| 468 | struct list_head list; /* Session list */ |
| 469 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
| 470 | uuid_le uuid; /* Trace session unique ID */ |
| 471 | struct lttng_metadata_cache *metadata_cache; |
| 472 | unsigned int metadata_dumped:1, |
| 473 | tstate:1; /* Transient enable state */ |
| 474 | /* List of event enablers */ |
| 475 | struct list_head enablers_head; |
| 476 | /* Hash table of events */ |
| 477 | struct lttng_event_ht events_ht; |
| 478 | char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN]; |
| 479 | char creation_time[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN]; |
| 480 | }; |
| 481 | |
| 482 | struct lttng_id_hash_node { |
| 483 | struct hlist_node hlist; |
| 484 | int id; |
| 485 | }; |
| 486 | |
| 487 | enum tracker_type { |
| 488 | TRACKER_PID, |
| 489 | TRACKER_VPID, |
| 490 | TRACKER_UID, |
| 491 | TRACKER_VUID, |
| 492 | TRACKER_GID, |
| 493 | TRACKER_VGID, |
| 494 | |
| 495 | TRACKER_UNKNOWN, |
| 496 | }; |
| 497 | |
| 498 | struct lttng_kernel_id_tracker_private { |
| 499 | struct lttng_kernel_id_tracker *pub; /* Public interface */ |
| 500 | |
| 501 | struct lttng_kernel_session *session; |
| 502 | enum tracker_type tracker_type; |
| 503 | }; |
| 504 | |
| 505 | extern struct lttng_kernel_ctx *lttng_static_ctx; |
| 506 | |
| 507 | static inline |
| 508 | const struct lttng_kernel_type_integer *lttng_kernel_get_type_integer(const struct lttng_kernel_type_common *type) |
| 509 | { |
| 510 | if (type->type != lttng_kernel_type_integer) |
| 511 | return NULL; |
| 512 | return container_of(type, const struct lttng_kernel_type_integer, parent); |
| 513 | } |
| 514 | |
| 515 | static inline |
| 516 | const struct lttng_kernel_type_string *lttng_kernel_get_type_string(const struct lttng_kernel_type_common *type) |
| 517 | { |
| 518 | if (type->type != lttng_kernel_type_string) |
| 519 | return NULL; |
| 520 | return container_of(type, const struct lttng_kernel_type_string, parent); |
| 521 | } |
| 522 | |
| 523 | static inline |
| 524 | const struct lttng_kernel_type_enum *lttng_kernel_get_type_enum(const struct lttng_kernel_type_common *type) |
| 525 | { |
| 526 | if (type->type != lttng_kernel_type_enum) |
| 527 | return NULL; |
| 528 | return container_of(type, const struct lttng_kernel_type_enum, parent); |
| 529 | } |
| 530 | |
| 531 | static inline |
| 532 | const struct lttng_kernel_type_array *lttng_kernel_get_type_array(const struct lttng_kernel_type_common *type) |
| 533 | { |
| 534 | if (type->type != lttng_kernel_type_array) |
| 535 | return NULL; |
| 536 | return container_of(type, const struct lttng_kernel_type_array, parent); |
| 537 | } |
| 538 | |
| 539 | static inline |
| 540 | const struct lttng_kernel_type_sequence *lttng_kernel_get_type_sequence(const struct lttng_kernel_type_common *type) |
| 541 | { |
| 542 | if (type->type != lttng_kernel_type_sequence) |
| 543 | return NULL; |
| 544 | return container_of(type, const struct lttng_kernel_type_sequence, parent); |
| 545 | } |
| 546 | |
| 547 | static inline |
| 548 | const struct lttng_kernel_type_struct *lttng_kernel_get_type_struct(const struct lttng_kernel_type_common *type) |
| 549 | { |
| 550 | if (type->type != lttng_kernel_type_struct) |
| 551 | return NULL; |
| 552 | return container_of(type, const struct lttng_kernel_type_struct, parent); |
| 553 | } |
| 554 | |
| 555 | static inline |
| 556 | const struct lttng_kernel_type_variant *lttng_kernel_get_type_variant(const struct lttng_kernel_type_common *type) |
| 557 | { |
| 558 | if (type->type != lttng_kernel_type_variant) |
| 559 | return NULL; |
| 560 | return container_of(type, const struct lttng_kernel_type_variant, parent); |
| 561 | } |
| 562 | |
| 563 | static inline bool lttng_kernel_type_is_bytewise_integer(const struct lttng_kernel_type_common *type) |
| 564 | { |
| 565 | const struct lttng_kernel_type_integer *type_integer = lttng_kernel_get_type_integer(type); |
| 566 | |
| 567 | if (!type_integer) |
| 568 | return false; |
| 569 | switch (type_integer->size) { |
| 570 | case 8: |
| 571 | lttng_fallthrough; |
| 572 | case 16: |
| 573 | lttng_fallthrough; |
| 574 | case 32: |
| 575 | lttng_fallthrough; |
| 576 | case 64: |
| 577 | break; |
| 578 | default: |
| 579 | return false; |
| 580 | } |
| 581 | return true; |
| 582 | } |
| 583 | |
| 584 | int lttng_kernel_interpret_event_filter(const struct lttng_kernel_event_common *event, |
| 585 | const char *interpreter_stack_data, |
| 586 | struct lttng_kernel_probe_ctx *probe_ctx, |
| 587 | void *event_filter_ctx); |
| 588 | |
| 589 | static inline |
| 590 | struct lttng_event_enabler_common *lttng_event_recorder_enabler_as_enabler( |
| 591 | struct lttng_event_recorder_enabler *event_recorder_enabler) |
| 592 | { |
| 593 | return &event_recorder_enabler->parent; |
| 594 | } |
| 595 | |
| 596 | static inline |
| 597 | struct lttng_event_enabler_common *lttng_event_notifier_enabler_as_enabler( |
| 598 | struct lttng_event_notifier_enabler *event_notifier_enabler) |
| 599 | { |
| 600 | return &event_notifier_enabler->parent; |
| 601 | } |
| 602 | |
| 603 | int lttng_context_init(void); |
| 604 | void lttng_context_exit(void); |
| 605 | int lttng_kernel_context_append(struct lttng_kernel_ctx **ctx_p, |
| 606 | const struct lttng_kernel_ctx_field *f); |
| 607 | void lttng_kernel_context_remove_last(struct lttng_kernel_ctx **ctx_p); |
| 608 | struct lttng_kernel_ctx_field *lttng_kernel_get_context_field_from_index(struct lttng_kernel_ctx *ctx, |
| 609 | size_t index); |
| 610 | int lttng_kernel_find_context(struct lttng_kernel_ctx *ctx, const char *name); |
| 611 | int lttng_kernel_get_context_index(struct lttng_kernel_ctx *ctx, const char *name); |
| 612 | void lttng_kernel_destroy_context(struct lttng_kernel_ctx *ctx); |
| 613 | int lttng_add_pid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 614 | int lttng_add_cpu_id_to_ctx(struct lttng_kernel_ctx **ctx); |
| 615 | int lttng_add_procname_to_ctx(struct lttng_kernel_ctx **ctx); |
| 616 | int lttng_add_prio_to_ctx(struct lttng_kernel_ctx **ctx); |
| 617 | int lttng_add_nice_to_ctx(struct lttng_kernel_ctx **ctx); |
| 618 | int lttng_add_vpid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 619 | int lttng_add_tid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 620 | int lttng_add_vtid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 621 | int lttng_add_ppid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 622 | int lttng_add_vppid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 623 | int lttng_add_hostname_to_ctx(struct lttng_kernel_ctx **ctx); |
| 624 | int lttng_add_interruptible_to_ctx(struct lttng_kernel_ctx **ctx); |
| 625 | int lttng_add_need_reschedule_to_ctx(struct lttng_kernel_ctx **ctx); |
| 626 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) |
| 627 | int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx); |
| 628 | #else |
| 629 | static inline |
| 630 | int lttng_add_preemptible_to_ctx(struct lttng_kernel_ctx **ctx) |
| 631 | { |
| 632 | return -ENOSYS; |
| 633 | } |
| 634 | #endif |
| 635 | #ifdef CONFIG_PREEMPT_RT_FULL |
| 636 | int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx); |
| 637 | #else |
| 638 | static inline |
| 639 | int lttng_add_migratable_to_ctx(struct lttng_kernel_ctx **ctx) |
| 640 | { |
| 641 | return -ENOSYS; |
| 642 | } |
| 643 | #endif |
| 644 | |
| 645 | int lttng_add_callstack_to_ctx(struct lttng_kernel_ctx **ctx, int type); |
| 646 | |
| 647 | #if defined(CONFIG_CGROUPS) && \ |
| 648 | ((LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(4,6,0)) || \ |
| 649 | LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0)) |
| 650 | int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 651 | #else |
| 652 | static inline |
| 653 | int lttng_add_cgroup_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 654 | { |
| 655 | return -ENOSYS; |
| 656 | } |
| 657 | #endif |
| 658 | |
| 659 | #if defined(CONFIG_IPC_NS) && \ |
| 660 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 661 | int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 662 | #else |
| 663 | static inline |
| 664 | int lttng_add_ipc_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 665 | { |
| 666 | return -ENOSYS; |
| 667 | } |
| 668 | #endif |
| 669 | |
| 670 | #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \ |
| 671 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 672 | int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 673 | #else |
| 674 | static inline |
| 675 | int lttng_add_mnt_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 676 | { |
| 677 | return -ENOSYS; |
| 678 | } |
| 679 | #endif |
| 680 | |
| 681 | #if defined(CONFIG_NET_NS) && \ |
| 682 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 683 | int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 684 | #else |
| 685 | static inline |
| 686 | int lttng_add_net_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 687 | { |
| 688 | return -ENOSYS; |
| 689 | } |
| 690 | #endif |
| 691 | |
| 692 | #if defined(CONFIG_PID_NS) && \ |
| 693 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 694 | int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 695 | #else |
| 696 | static inline |
| 697 | int lttng_add_pid_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 698 | { |
| 699 | return -ENOSYS; |
| 700 | } |
| 701 | #endif |
| 702 | |
| 703 | #if defined(CONFIG_USER_NS) && \ |
| 704 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 705 | int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 706 | #else |
| 707 | static inline |
| 708 | int lttng_add_user_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 709 | { |
| 710 | return -ENOSYS; |
| 711 | } |
| 712 | #endif |
| 713 | |
| 714 | #if defined(CONFIG_UTS_NS) && \ |
| 715 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(3,8,0)) |
| 716 | int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 717 | #else |
| 718 | static inline |
| 719 | int lttng_add_uts_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 720 | { |
| 721 | return -ENOSYS; |
| 722 | } |
| 723 | #endif |
| 724 | |
| 725 | #if defined(CONFIG_TIME_NS) && \ |
| 726 | (LTTNG_LINUX_VERSION_CODE >= LTTNG_KERNEL_VERSION(5,6,0) || \ |
| 727 | LTTNG_RHEL_KERNEL_RANGE(4,18,0,305,0,0, 4,19,0,0,0,0)) |
| 728 | int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx); |
| 729 | #else |
| 730 | static inline |
| 731 | int lttng_add_time_ns_to_ctx(struct lttng_kernel_ctx **ctx) |
| 732 | { |
| 733 | return -ENOSYS; |
| 734 | } |
| 735 | #endif |
| 736 | |
| 737 | int lttng_add_uid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 738 | int lttng_add_euid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 739 | int lttng_add_suid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 740 | int lttng_add_gid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 741 | int lttng_add_egid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 742 | int lttng_add_sgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 743 | int lttng_add_vuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 744 | int lttng_add_veuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 745 | int lttng_add_vsuid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 746 | int lttng_add_vgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 747 | int lttng_add_vegid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 748 | int lttng_add_vsgid_to_ctx(struct lttng_kernel_ctx **ctx); |
| 749 | |
| 750 | #if defined(CONFIG_PERF_EVENTS) |
| 751 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 752 | uint64_t config, |
| 753 | const char *name, |
| 754 | struct lttng_kernel_ctx **ctx); |
| 755 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 756 | struct lttng_cpuhp_node *node); |
| 757 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 758 | struct lttng_cpuhp_node *node); |
| 759 | #else |
| 760 | static inline |
| 761 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 762 | uint64_t config, |
| 763 | const char *name, |
| 764 | struct lttng_kernel_ctx **ctx) |
| 765 | { |
| 766 | return -ENOSYS; |
| 767 | } |
| 768 | static inline |
| 769 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
| 770 | struct lttng_cpuhp_node *node) |
| 771 | { |
| 772 | return 0; |
| 773 | } |
| 774 | static inline |
| 775 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, |
| 776 | struct lttng_cpuhp_node *node) |
| 777 | { |
| 778 | return 0; |
| 779 | } |
| 780 | #endif |
| 781 | |
| 782 | struct lttng_event_recorder_enabler *lttng_event_recorder_enabler_create( |
| 783 | enum lttng_enabler_format_type format_type, |
| 784 | struct lttng_kernel_abi_event *event_param, |
| 785 | struct lttng_kernel_channel_buffer *chan); |
| 786 | void lttng_event_enabler_session_add(struct lttng_kernel_session *session, |
| 787 | struct lttng_event_recorder_enabler *event_enabler); |
| 788 | |
| 789 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
| 790 | struct lttng_event_notifier_group *event_notifier_group, |
| 791 | enum lttng_enabler_format_type format_type, |
| 792 | struct lttng_kernel_abi_event_notifier *event_notifier_param); |
| 793 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
| 794 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
| 795 | struct lttng_kernel_abi_capture_bytecode __user *bytecode); |
| 796 | |
| 797 | int lttng_event_enabler_enable(struct lttng_event_enabler_common *event_enabler); |
| 798 | int lttng_event_enabler_disable(struct lttng_event_enabler_common *event_enabler); |
| 799 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler_common *event_enabler, |
| 800 | struct lttng_kernel_abi_filter_bytecode __user *bytecode); |
| 801 | void lttng_event_enabler_destroy(struct lttng_event_enabler_common *event_enabler); |
| 802 | |
| 803 | int lttng_desc_match_enabler(const struct lttng_kernel_event_desc *desc, |
| 804 | struct lttng_event_enabler_common *enabler); |
| 805 | |
| 806 | void lttng_enabler_link_bytecode(const struct lttng_kernel_event_desc *event_desc, |
| 807 | struct lttng_kernel_ctx *ctx, |
| 808 | struct list_head *instance_bytecode_runtime_head, |
| 809 | struct list_head *enabler_bytecode_runtime_head); |
| 810 | |
| 811 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
| 812 | int lttng_syscalls_register_event(struct lttng_event_enabler_common *event_enabler); |
| 813 | int lttng_syscall_filter_enable_event(struct lttng_kernel_event_common *event); |
| 814 | int lttng_syscall_filter_disable_event(struct lttng_kernel_event_common *event); |
| 815 | |
| 816 | int lttng_syscalls_unregister_syscall_table(struct lttng_kernel_syscall_table *syscall_table); |
| 817 | int lttng_syscalls_destroy_syscall_table(struct lttng_kernel_syscall_table *syscall_table); |
| 818 | |
| 819 | long lttng_syscall_table_get_active_mask(struct lttng_kernel_syscall_table *syscall_table, |
| 820 | struct lttng_kernel_abi_syscall_mask __user *usyscall_mask); |
| 821 | #else |
| 822 | static inline int lttng_syscalls_register_event(struct lttng_event_enabler_common *event_enabler) |
| 823 | { |
| 824 | return -ENOSYS; |
| 825 | } |
| 826 | |
| 827 | static inline int lttng_syscall_filter_enable_event(struct lttng_kernel_event_common *event) |
| 828 | { |
| 829 | return -ENOSYS; |
| 830 | } |
| 831 | |
| 832 | static inline int lttng_syscall_filter_disable_event(struct lttng_kernel_event_common *event) |
| 833 | { |
| 834 | return -ENOSYS; |
| 835 | } |
| 836 | |
| 837 | static inline int lttng_syscalls_unregister_syscall_table(struct lttng_kernel_syscall_table *syscall_table) |
| 838 | { |
| 839 | return 0; |
| 840 | } |
| 841 | |
| 842 | static inline int lttng_syscalls_destroy_syscall_table(struct lttng_kernel_syscall_table *syscall_table) |
| 843 | { |
| 844 | return 0; |
| 845 | } |
| 846 | |
| 847 | static inline long lttng_syscall_table_get_active_mask(struct lttng_kernel_syscall_table *syscall_table, |
| 848 | struct lttng_kernel_abi_syscall_mask __user *usyscall_mask) |
| 849 | { |
| 850 | return -ENOSYS; |
| 851 | } |
| 852 | |
| 853 | static inline int lttng_syscalls_create_matching_event_notifiers(struct lttng_event_notifier_enabler *event_notifier_enabler) |
| 854 | { |
| 855 | return -ENOSYS; |
| 856 | } |
| 857 | |
| 858 | #endif |
| 859 | |
| 860 | #ifdef CONFIG_KPROBES |
| 861 | int lttng_kprobes_register_event(const char *name, |
| 862 | const char *symbol_name, |
| 863 | uint64_t offset, |
| 864 | uint64_t addr, |
| 865 | struct lttng_kernel_event_common *event); |
| 866 | void lttng_kprobes_unregister_event(struct lttng_kernel_event_common *event); |
| 867 | void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_common *event); |
| 868 | #else |
| 869 | static inline |
| 870 | int lttng_kprobes_register_event(const char *name, |
| 871 | const char *symbol_name, |
| 872 | uint64_t offset, |
| 873 | uint64_t addr, |
| 874 | struct lttng_kernel_event_common *event) |
| 875 | { |
| 876 | return -ENOSYS; |
| 877 | } |
| 878 | |
| 879 | static inline |
| 880 | void lttng_kprobes_unregister_event(struct lttng_kernel_event_common *event) |
| 881 | { |
| 882 | } |
| 883 | |
| 884 | static inline |
| 885 | void lttng_kprobes_destroy_event_private(struct lttng_kernel_event_common *event) |
| 886 | { |
| 887 | } |
| 888 | #endif |
| 889 | |
| 890 | int lttng_event_add_callsite(struct lttng_kernel_event_common *event, |
| 891 | struct lttng_kernel_abi_event_callsite __user *callsite); |
| 892 | |
| 893 | #ifdef CONFIG_UPROBES |
| 894 | int lttng_uprobes_register_event(const char *name, |
| 895 | int fd, struct lttng_kernel_event_common *event); |
| 896 | int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event, |
| 897 | struct lttng_kernel_abi_event_callsite __user *callsite); |
| 898 | void lttng_uprobes_unregister_event(struct lttng_kernel_event_common *event); |
| 899 | void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_common *event); |
| 900 | #else |
| 901 | static inline |
| 902 | int lttng_uprobes_register_event(const char *name, |
| 903 | int fd, struct lttng_kernel_event_common *event) |
| 904 | { |
| 905 | return -ENOSYS; |
| 906 | } |
| 907 | |
| 908 | static inline |
| 909 | int lttng_uprobes_event_add_callsite(struct lttng_kernel_event_common *event, |
| 910 | struct lttng_kernel_abi_event_callsite __user *callsite) |
| 911 | { |
| 912 | return -ENOSYS; |
| 913 | } |
| 914 | |
| 915 | static inline |
| 916 | void lttng_uprobes_unregister_event(struct lttng_kernel_event_common *event) |
| 917 | { |
| 918 | } |
| 919 | |
| 920 | static inline |
| 921 | void lttng_uprobes_destroy_event_private(struct lttng_kernel_event_common *event) |
| 922 | { |
| 923 | } |
| 924 | #endif |
| 925 | |
| 926 | #ifdef CONFIG_KRETPROBES |
| 927 | int lttng_kretprobes_register(const char *name, |
| 928 | const char *symbol_name, |
| 929 | uint64_t offset, |
| 930 | uint64_t addr, |
| 931 | struct lttng_kernel_event_common *event_entry, |
| 932 | struct lttng_kernel_event_common *event_exit); |
| 933 | void lttng_kretprobes_unregister(struct lttng_kernel_event_common *event); |
| 934 | void lttng_kretprobes_destroy_private(struct lttng_kernel_event_common *event); |
| 935 | int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event, |
| 936 | int enable); |
| 937 | #else |
| 938 | static inline |
| 939 | int lttng_kretprobes_register(const char *name, |
| 940 | const char *symbol_name, |
| 941 | uint64_t offset, |
| 942 | uint64_t addr, |
| 943 | struct lttng_kernel_event_common *event_entry, |
| 944 | struct lttng_kernel_event_common *event_exit) |
| 945 | { |
| 946 | return -ENOSYS; |
| 947 | } |
| 948 | |
| 949 | static inline |
| 950 | void lttng_kretprobes_unregister(struct lttng_kernel_event_common *event) |
| 951 | { |
| 952 | } |
| 953 | |
| 954 | static inline |
| 955 | void lttng_kretprobes_destroy_private(struct lttng_kernel_event_common *event) |
| 956 | { |
| 957 | } |
| 958 | |
| 959 | static inline |
| 960 | int lttng_kretprobes_event_enable_state(struct lttng_kernel_event_common *event, |
| 961 | int enable) |
| 962 | { |
| 963 | return -ENOSYS; |
| 964 | } |
| 965 | #endif |
| 966 | |
| 967 | void lttng_lock_sessions(void); |
| 968 | void lttng_unlock_sessions(void); |
| 969 | |
| 970 | struct list_head *lttng_get_probe_list_head(void); |
| 971 | |
| 972 | int lttng_fix_pending_events(void); |
| 973 | int lttng_fix_pending_event_notifiers(void); |
| 974 | int lttng_session_active(void); |
| 975 | bool lttng_event_notifier_active(void); |
| 976 | |
| 977 | struct lttng_kernel_session *lttng_session_create(void); |
| 978 | int lttng_session_enable(struct lttng_kernel_session *session); |
| 979 | int lttng_session_disable(struct lttng_kernel_session *session); |
| 980 | void lttng_session_destroy(struct lttng_kernel_session *session); |
| 981 | int lttng_session_metadata_regenerate(struct lttng_kernel_session *session); |
| 982 | int lttng_session_statedump(struct lttng_kernel_session *session); |
| 983 | void metadata_cache_destroy(struct kref *kref); |
| 984 | |
| 985 | struct lttng_counter *lttng_kernel_counter_create( |
| 986 | const char *counter_transport_name, size_t number_dimensions, |
| 987 | const size_t *dimensions_sizes); |
| 988 | int lttng_kernel_counter_read(struct lttng_counter *counter, |
| 989 | const size_t *dimension_indexes, int32_t cpu, |
| 990 | int64_t *val, bool *overflow, bool *underflow); |
| 991 | int lttng_kernel_counter_aggregate(struct lttng_counter *counter, |
| 992 | const size_t *dimension_indexes, int64_t *val, |
| 993 | bool *overflow, bool *underflow); |
| 994 | int lttng_kernel_counter_clear(struct lttng_counter *counter, |
| 995 | const size_t *dimension_indexes); |
| 996 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void); |
| 997 | int lttng_event_notifier_group_create_error_counter( |
| 998 | struct file *event_notifier_group_file, |
| 999 | const struct lttng_kernel_abi_counter_conf *error_counter_conf); |
| 1000 | void lttng_event_notifier_group_destroy( |
| 1001 | struct lttng_event_notifier_group *event_notifier_group); |
| 1002 | |
| 1003 | struct lttng_kernel_channel_buffer *lttng_channel_buffer_create(struct lttng_kernel_session *session, |
| 1004 | const char *transport_name, |
| 1005 | void *buf_addr, |
| 1006 | size_t subbuf_size, size_t num_subbuf, |
| 1007 | unsigned int switch_timer_interval, |
| 1008 | unsigned int read_timer_interval, |
| 1009 | enum channel_type channel_type); |
| 1010 | struct lttng_kernel_channel_buffer *lttng_global_channel_create(struct lttng_kernel_session *session, |
| 1011 | int overwrite, void *buf_addr, |
| 1012 | size_t subbuf_size, size_t num_subbuf, |
| 1013 | unsigned int switch_timer_interval, |
| 1014 | unsigned int read_timer_interval); |
| 1015 | |
| 1016 | void lttng_metadata_channel_destroy(struct lttng_kernel_channel_buffer *chan); |
| 1017 | struct lttng_kernel_event_recorder *lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler, |
| 1018 | const struct lttng_kernel_event_desc *event_desc); |
| 1019 | struct lttng_kernel_event_recorder *_lttng_kernel_event_recorder_create(struct lttng_event_recorder_enabler *event_enabler, |
| 1020 | const struct lttng_kernel_event_desc *event_desc); |
| 1021 | struct lttng_kernel_event_recorder *lttng_event_compat_old_create(struct lttng_kernel_channel_buffer *chan, |
| 1022 | struct lttng_kernel_abi_old_event *old_event_param, |
| 1023 | const struct lttng_kernel_event_desc *internal_desc); |
| 1024 | |
| 1025 | struct lttng_kernel_event_notifier *lttng_event_notifier_create( |
| 1026 | const struct lttng_kernel_event_desc *event_notifier_desc, |
| 1027 | uint64_t id, |
| 1028 | uint64_t error_counter_idx, |
| 1029 | struct lttng_event_notifier_group *event_notifier_group, |
| 1030 | struct lttng_kernel_abi_event_notifier *event_notifier_param, |
| 1031 | enum lttng_kernel_abi_instrumentation itype); |
| 1032 | struct lttng_kernel_event_notifier *_lttng_event_notifier_create( |
| 1033 | const struct lttng_kernel_event_desc *event_notifier_desc, |
| 1034 | uint64_t id, |
| 1035 | uint64_t error_counter_idx, |
| 1036 | struct lttng_event_notifier_group *event_notifier_group, |
| 1037 | struct lttng_kernel_abi_event_notifier *event_notifier_param, |
| 1038 | enum lttng_kernel_abi_instrumentation itype); |
| 1039 | |
| 1040 | int lttng_channel_enable(struct lttng_kernel_channel_common *channel); |
| 1041 | int lttng_channel_disable(struct lttng_kernel_channel_common *channel); |
| 1042 | int lttng_event_enable(struct lttng_kernel_event_common *event); |
| 1043 | int lttng_event_disable(struct lttng_kernel_event_common *event); |
| 1044 | |
| 1045 | void lttng_transport_register(struct lttng_transport *transport); |
| 1046 | void lttng_transport_unregister(struct lttng_transport *transport); |
| 1047 | |
| 1048 | void lttng_counter_transport_register(struct lttng_counter_transport *transport); |
| 1049 | void lttng_counter_transport_unregister(struct lttng_counter_transport *transport); |
| 1050 | |
| 1051 | void synchronize_trace(void); |
| 1052 | int lttng_abi_init(void); |
| 1053 | int lttng_abi_compat_old_init(void); |
| 1054 | void lttng_abi_exit(void); |
| 1055 | void lttng_abi_compat_old_exit(void); |
| 1056 | |
| 1057 | const struct lttng_kernel_event_desc *lttng_event_desc_get(const char *name); |
| 1058 | void lttng_event_desc_put(const struct lttng_kernel_event_desc *desc); |
| 1059 | int lttng_probes_init(void); |
| 1060 | void lttng_probes_exit(void); |
| 1061 | |
| 1062 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
| 1063 | struct lttng_kernel_ring_buffer_channel *chan, bool *coherent); |
| 1064 | |
| 1065 | int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node); |
| 1066 | int lttng_id_tracker_empty_set(struct lttng_kernel_id_tracker *lf); |
| 1067 | int lttng_id_tracker_init(struct lttng_kernel_id_tracker *lf, |
| 1068 | struct lttng_kernel_session *session, |
| 1069 | enum tracker_type type); |
| 1070 | void lttng_id_tracker_fini(struct lttng_kernel_id_tracker *lf); |
| 1071 | void lttng_id_tracker_destroy(struct lttng_kernel_id_tracker *lf, bool rcu); |
| 1072 | int lttng_id_tracker_add(struct lttng_kernel_id_tracker *lf, int id); |
| 1073 | int lttng_id_tracker_del(struct lttng_kernel_id_tracker *lf, int id); |
| 1074 | |
| 1075 | int lttng_session_track_id(struct lttng_kernel_session *session, |
| 1076 | enum tracker_type tracker_type, int id); |
| 1077 | int lttng_session_untrack_id(struct lttng_kernel_session *session, |
| 1078 | enum tracker_type tracker_type, int id); |
| 1079 | |
| 1080 | int lttng_session_list_tracker_ids(struct lttng_kernel_session *session, |
| 1081 | enum tracker_type tracker_type); |
| 1082 | |
| 1083 | void lttng_clock_ref(void); |
| 1084 | void lttng_clock_unref(void); |
| 1085 | |
| 1086 | void lttng_free_event_filter_runtime(struct lttng_kernel_event_common *event); |
| 1087 | |
| 1088 | int lttng_probes_init(void); |
| 1089 | |
| 1090 | int lttng_logger_init(void); |
| 1091 | void lttng_logger_exit(void); |
| 1092 | |
| 1093 | extern int lttng_statedump_start(struct lttng_kernel_session *session); |
| 1094 | |
| 1095 | int lttng_calibrate(struct lttng_kernel_abi_calibrate *calibrate); |
| 1096 | |
| 1097 | extern const struct file_operations lttng_tracepoint_list_fops; |
| 1098 | extern const struct file_operations lttng_syscall_list_fops; |
| 1099 | |
| 1100 | #define lttng_kernel_static_ctx_field(_event_field, _get_size, _record, _get_value, _destroy, _priv) \ |
| 1101 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_ctx_field, { \ |
| 1102 | .event_field = (_event_field), \ |
| 1103 | .get_size = (_get_size), \ |
| 1104 | .record = (_record), \ |
| 1105 | .get_value = (_get_value), \ |
| 1106 | .destroy = (_destroy), \ |
| 1107 | .priv = (_priv), \ |
| 1108 | }) |
| 1109 | |
| 1110 | #endif /* _LTTNG_EVENTS_INTERNAL_H */ |