| 1 | #ifndef _LTTNG_EVENTS_H |
| 2 | #define _LTTNG_EVENTS_H |
| 3 | |
| 4 | /* |
| 5 | * lttng-events.h |
| 6 | * |
| 7 | * Holds LTTng per-session event registry. |
| 8 | * |
| 9 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 10 | * |
| 11 | * This library is free software; you can redistribute it and/or |
| 12 | * modify it under the terms of the GNU Lesser General Public |
| 13 | * License as published by the Free Software Foundation; only |
| 14 | * version 2.1 of the License. |
| 15 | * |
| 16 | * This library is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 19 | * Lesser General Public License for more details. |
| 20 | * |
| 21 | * You should have received a copy of the GNU Lesser General Public |
| 22 | * License along with this library; if not, write to the Free Software |
| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 24 | */ |
| 25 | |
| 26 | #include <linux/version.h> |
| 27 | #include <linux/list.h> |
| 28 | #include <linux/kprobes.h> |
| 29 | #include <linux/kref.h> |
| 30 | #include "wrapper/uuid.h" |
| 31 | #include "lttng-abi.h" |
| 32 | #include "lttng-abi-old.h" |
| 33 | |
| 34 | #define lttng_is_signed_type(type) (((type)(-1)) < 0) |
| 35 | |
| 36 | struct lttng_channel; |
| 37 | struct lttng_session; |
| 38 | struct lttng_metadata_cache; |
| 39 | struct lib_ring_buffer_ctx; |
| 40 | struct perf_event; |
| 41 | struct perf_event_attr; |
| 42 | struct lib_ring_buffer_config; |
| 43 | |
| 44 | /* Type description */ |
| 45 | |
| 46 | /* Update the astract_types name table in lttng-types.c along with this enum */ |
| 47 | enum abstract_types { |
| 48 | atype_integer, |
| 49 | atype_enum, |
| 50 | atype_array, |
| 51 | atype_sequence, |
| 52 | atype_string, |
| 53 | NR_ABSTRACT_TYPES, |
| 54 | }; |
| 55 | |
| 56 | /* Update the string_encodings name table in lttng-types.c along with this enum */ |
| 57 | enum lttng_string_encodings { |
| 58 | lttng_encode_none = 0, |
| 59 | lttng_encode_UTF8 = 1, |
| 60 | lttng_encode_ASCII = 2, |
| 61 | NR_STRING_ENCODINGS, |
| 62 | }; |
| 63 | |
| 64 | enum channel_type { |
| 65 | PER_CPU_CHANNEL, |
| 66 | METADATA_CHANNEL, |
| 67 | }; |
| 68 | |
| 69 | struct lttng_enum_entry { |
| 70 | unsigned long long start, end; /* start and end are inclusive */ |
| 71 | const char *string; |
| 72 | }; |
| 73 | |
| 74 | #define __type_integer(_type, _size, _alignment, _signedness, \ |
| 75 | _byte_order, _base, _encoding) \ |
| 76 | { \ |
| 77 | .atype = atype_integer, \ |
| 78 | .u.basic.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 | union _lttng_basic_type { |
| 99 | struct lttng_integer_type integer; |
| 100 | struct { |
| 101 | const char *name; |
| 102 | } enumeration; |
| 103 | struct { |
| 104 | enum lttng_string_encodings encoding; |
| 105 | } string; |
| 106 | }; |
| 107 | |
| 108 | struct lttng_basic_type { |
| 109 | enum abstract_types atype; |
| 110 | union { |
| 111 | union _lttng_basic_type basic; |
| 112 | } u; |
| 113 | }; |
| 114 | |
| 115 | struct lttng_type { |
| 116 | enum abstract_types atype; |
| 117 | union { |
| 118 | union _lttng_basic_type basic; |
| 119 | struct { |
| 120 | struct lttng_basic_type elem_type; |
| 121 | unsigned int length; /* num. elems. */ |
| 122 | unsigned int elem_alignment; /* alignment override */ |
| 123 | } array; |
| 124 | struct { |
| 125 | struct lttng_basic_type length_type; |
| 126 | struct lttng_basic_type elem_type; |
| 127 | unsigned int elem_alignment; /* alignment override */ |
| 128 | } sequence; |
| 129 | } u; |
| 130 | }; |
| 131 | |
| 132 | struct lttng_enum { |
| 133 | const char *name; |
| 134 | struct lttng_type container_type; |
| 135 | const struct lttng_enum_entry *entries; |
| 136 | unsigned int len; |
| 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 | }; |
| 147 | |
| 148 | union lttng_ctx_value { |
| 149 | int64_t s64; |
| 150 | const char *str; |
| 151 | double d; |
| 152 | }; |
| 153 | |
| 154 | /* |
| 155 | * We need to keep this perf counter field separately from struct |
| 156 | * lttng_ctx_field because cpu hotplug needs fixed-location addresses. |
| 157 | */ |
| 158 | struct lttng_perf_counter_field { |
| 159 | struct notifier_block nb; |
| 160 | int hp_enable; |
| 161 | struct perf_event_attr *attr; |
| 162 | struct perf_event **e; /* per-cpu array */ |
| 163 | }; |
| 164 | |
| 165 | struct lttng_probe_ctx { |
| 166 | struct lttng_event *event; |
| 167 | uint8_t interruptible; |
| 168 | }; |
| 169 | |
| 170 | struct lttng_ctx_field { |
| 171 | struct lttng_event_field event_field; |
| 172 | size_t (*get_size)(size_t offset); |
| 173 | void (*record)(struct lttng_ctx_field *field, |
| 174 | struct lib_ring_buffer_ctx *ctx, |
| 175 | struct lttng_channel *chan); |
| 176 | void (*get_value)(struct lttng_ctx_field *field, |
| 177 | struct lttng_probe_ctx *lttng_probe_ctx, |
| 178 | union lttng_ctx_value *value); |
| 179 | union { |
| 180 | struct lttng_perf_counter_field *perf_counter; |
| 181 | } u; |
| 182 | void (*destroy)(struct lttng_ctx_field *field); |
| 183 | }; |
| 184 | |
| 185 | struct lttng_ctx { |
| 186 | struct lttng_ctx_field *fields; |
| 187 | unsigned int nr_fields; |
| 188 | unsigned int allocated_fields; |
| 189 | size_t largest_align; /* in bytes */ |
| 190 | }; |
| 191 | |
| 192 | struct lttng_event_desc { |
| 193 | const char *name; /* lttng-modules name */ |
| 194 | const char *kname; /* Linux kernel name (tracepoints) */ |
| 195 | void *probe_callback; |
| 196 | const struct lttng_event_ctx *ctx; /* context */ |
| 197 | const struct lttng_event_field *fields; /* event payload */ |
| 198 | unsigned int nr_fields; |
| 199 | struct module *owner; |
| 200 | }; |
| 201 | |
| 202 | struct lttng_probe_desc { |
| 203 | const char *provider; |
| 204 | const struct lttng_event_desc **event_desc; |
| 205 | unsigned int nr_events; |
| 206 | struct list_head head; /* chain registered probes */ |
| 207 | struct list_head lazy_init_head; |
| 208 | int lazy; /* lazy registration */ |
| 209 | }; |
| 210 | |
| 211 | struct lttng_krp; /* Kretprobe handling */ |
| 212 | |
| 213 | enum lttng_event_type { |
| 214 | LTTNG_TYPE_EVENT = 0, |
| 215 | LTTNG_TYPE_ENABLER = 1, |
| 216 | }; |
| 217 | |
| 218 | struct lttng_filter_bytecode_node { |
| 219 | struct list_head node; |
| 220 | struct lttng_enabler *enabler; |
| 221 | /* |
| 222 | * struct lttng_kernel_filter_bytecode has var. sized array, must be |
| 223 | * last field. |
| 224 | */ |
| 225 | struct lttng_kernel_filter_bytecode bc; |
| 226 | }; |
| 227 | |
| 228 | /* |
| 229 | * Filter return value masks. |
| 230 | */ |
| 231 | enum lttng_filter_ret { |
| 232 | LTTNG_FILTER_DISCARD = 0, |
| 233 | LTTNG_FILTER_RECORD_FLAG = (1ULL << 0), |
| 234 | /* Other bits are kept for future use. */ |
| 235 | }; |
| 236 | |
| 237 | struct lttng_bytecode_runtime { |
| 238 | /* Associated bytecode */ |
| 239 | struct lttng_filter_bytecode_node *bc; |
| 240 | uint64_t (*filter)(void *filter_data, struct lttng_probe_ctx *lttng_probe_ctx, |
| 241 | const char *filter_stack_data); |
| 242 | int link_failed; |
| 243 | struct list_head node; /* list of bytecode runtime in event */ |
| 244 | }; |
| 245 | |
| 246 | /* |
| 247 | * Objects in a linked-list of enablers, owned by an event. |
| 248 | */ |
| 249 | struct lttng_enabler_ref { |
| 250 | struct list_head node; /* enabler ref list */ |
| 251 | struct lttng_enabler *ref; /* backward ref */ |
| 252 | }; |
| 253 | |
| 254 | /* |
| 255 | * lttng_event structure is referred to by the tracing fast path. It must be |
| 256 | * kept small. |
| 257 | */ |
| 258 | struct lttng_event { |
| 259 | enum lttng_event_type evtype; /* First field. */ |
| 260 | unsigned int id; |
| 261 | struct lttng_channel *chan; |
| 262 | int enabled; |
| 263 | const struct lttng_event_desc *desc; |
| 264 | void *filter; |
| 265 | struct lttng_ctx *ctx; |
| 266 | enum lttng_kernel_instrumentation instrumentation; |
| 267 | union { |
| 268 | struct { |
| 269 | struct kprobe kp; |
| 270 | char *symbol_name; |
| 271 | } kprobe; |
| 272 | struct { |
| 273 | struct lttng_krp *lttng_krp; |
| 274 | char *symbol_name; |
| 275 | } kretprobe; |
| 276 | struct { |
| 277 | char *symbol_name; |
| 278 | } ftrace; |
| 279 | } u; |
| 280 | struct list_head list; /* Event list in session */ |
| 281 | unsigned int metadata_dumped:1; |
| 282 | |
| 283 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ |
| 284 | struct list_head enablers_ref_head; |
| 285 | struct hlist_node hlist; /* session ht of events */ |
| 286 | int registered; /* has reg'd tracepoint probe */ |
| 287 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
| 288 | struct list_head bytecode_runtime_head; |
| 289 | int has_enablers_without_bytecode; |
| 290 | }; |
| 291 | |
| 292 | enum lttng_enabler_type { |
| 293 | LTTNG_ENABLER_WILDCARD, |
| 294 | LTTNG_ENABLER_NAME, |
| 295 | }; |
| 296 | |
| 297 | /* |
| 298 | * Enabler field, within whatever object is enabling an event. Target of |
| 299 | * backward reference. |
| 300 | */ |
| 301 | struct lttng_enabler { |
| 302 | enum lttng_event_type evtype; /* First field. */ |
| 303 | |
| 304 | enum lttng_enabler_type type; |
| 305 | |
| 306 | struct list_head node; /* per-session list of enablers */ |
| 307 | /* head list of struct lttng_ust_filter_bytecode_node */ |
| 308 | struct list_head filter_bytecode_head; |
| 309 | |
| 310 | struct lttng_kernel_event event_param; |
| 311 | struct lttng_channel *chan; |
| 312 | struct lttng_ctx *ctx; |
| 313 | unsigned int enabled:1; |
| 314 | }; |
| 315 | |
| 316 | struct lttng_channel_ops { |
| 317 | struct channel *(*channel_create)(const char *name, |
| 318 | struct lttng_channel *lttng_chan, |
| 319 | void *buf_addr, |
| 320 | size_t subbuf_size, size_t num_subbuf, |
| 321 | unsigned int switch_timer_interval, |
| 322 | unsigned int read_timer_interval); |
| 323 | void (*channel_destroy)(struct channel *chan); |
| 324 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); |
| 325 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
| 326 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
| 327 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
| 328 | uint32_t event_id); |
| 329 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
| 330 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, |
| 331 | size_t len); |
| 332 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
| 333 | const void *src, size_t len); |
| 334 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
| 335 | int c, size_t len); |
| 336 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
| 337 | size_t len); |
| 338 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, |
| 339 | const char __user *src, size_t len); |
| 340 | /* |
| 341 | * packet_avail_size returns the available size in the current |
| 342 | * packet. Note that the size returned is only a hint, since it |
| 343 | * may change due to concurrent writes. |
| 344 | */ |
| 345 | size_t (*packet_avail_size)(struct channel *chan); |
| 346 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
| 347 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
| 348 | int (*is_finalized)(struct channel *chan); |
| 349 | int (*is_disabled)(struct channel *chan); |
| 350 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
| 351 | struct lib_ring_buffer *bufb, |
| 352 | uint64_t *timestamp_begin); |
| 353 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, |
| 354 | struct lib_ring_buffer *bufb, |
| 355 | uint64_t *timestamp_end); |
| 356 | int (*events_discarded) (const struct lib_ring_buffer_config *config, |
| 357 | struct lib_ring_buffer *bufb, |
| 358 | uint64_t *events_discarded); |
| 359 | int (*content_size) (const struct lib_ring_buffer_config *config, |
| 360 | struct lib_ring_buffer *bufb, |
| 361 | uint64_t *content_size); |
| 362 | int (*packet_size) (const struct lib_ring_buffer_config *config, |
| 363 | struct lib_ring_buffer *bufb, |
| 364 | uint64_t *packet_size); |
| 365 | int (*stream_id) (const struct lib_ring_buffer_config *config, |
| 366 | struct lib_ring_buffer *bufb, |
| 367 | uint64_t *stream_id); |
| 368 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
| 369 | struct lib_ring_buffer *bufb, |
| 370 | uint64_t *ts); |
| 371 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
| 372 | struct lib_ring_buffer *bufb, |
| 373 | uint64_t *seq); |
| 374 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
| 375 | struct lib_ring_buffer *bufb, |
| 376 | uint64_t *id); |
| 377 | }; |
| 378 | |
| 379 | struct lttng_transport { |
| 380 | char *name; |
| 381 | struct module *owner; |
| 382 | struct list_head node; |
| 383 | struct lttng_channel_ops ops; |
| 384 | }; |
| 385 | |
| 386 | struct lttng_syscall_filter; |
| 387 | |
| 388 | #define LTTNG_EVENT_HT_BITS 12 |
| 389 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) |
| 390 | |
| 391 | struct lttng_event_ht { |
| 392 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; |
| 393 | }; |
| 394 | |
| 395 | struct lttng_channel { |
| 396 | unsigned int id; |
| 397 | struct channel *chan; /* Channel buffers */ |
| 398 | int enabled; |
| 399 | struct lttng_ctx *ctx; |
| 400 | /* Event ID management */ |
| 401 | struct lttng_session *session; |
| 402 | struct file *file; /* File associated to channel */ |
| 403 | unsigned int free_event_id; /* Next event ID to allocate */ |
| 404 | struct list_head list; /* Channel list */ |
| 405 | struct lttng_channel_ops *ops; |
| 406 | struct lttng_transport *transport; |
| 407 | struct lttng_event **sc_table; /* for syscall tracing */ |
| 408 | struct lttng_event **compat_sc_table; |
| 409 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
| 410 | struct lttng_event **compat_sc_exit_table; |
| 411 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
| 412 | struct lttng_event *sc_compat_unknown; |
| 413 | struct lttng_event *sc_exit_unknown; |
| 414 | struct lttng_event *compat_sc_exit_unknown; |
| 415 | struct lttng_syscall_filter *sc_filter; |
| 416 | int header_type; /* 0: unset, 1: compact, 2: large */ |
| 417 | enum channel_type channel_type; |
| 418 | unsigned int metadata_dumped:1, |
| 419 | sys_enter_registered:1, |
| 420 | sys_exit_registered:1, |
| 421 | syscall_all:1, |
| 422 | tstate:1; /* Transient enable state */ |
| 423 | }; |
| 424 | |
| 425 | struct lttng_metadata_stream { |
| 426 | void *priv; /* Ring buffer private data */ |
| 427 | struct lttng_metadata_cache *metadata_cache; |
| 428 | unsigned int metadata_in; /* Bytes read from the cache */ |
| 429 | unsigned int metadata_out; /* Bytes consumed from stream */ |
| 430 | int finalized; /* Has channel been finalized */ |
| 431 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ |
| 432 | struct list_head list; /* Stream list */ |
| 433 | struct lttng_transport *transport; |
| 434 | uint64_t version; /* Current version of the metadata cache */ |
| 435 | }; |
| 436 | |
| 437 | |
| 438 | /* |
| 439 | * struct lttng_pid_tracker declared in header due to deferencing of *v |
| 440 | * in RCU_INITIALIZER(v). |
| 441 | */ |
| 442 | #define LTTNG_PID_HASH_BITS 6 |
| 443 | #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS) |
| 444 | |
| 445 | struct lttng_pid_tracker { |
| 446 | struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE]; |
| 447 | }; |
| 448 | |
| 449 | struct lttng_pid_hash_node { |
| 450 | struct hlist_node hlist; |
| 451 | int pid; |
| 452 | }; |
| 453 | |
| 454 | struct lttng_session { |
| 455 | int active; /* Is trace session active ? */ |
| 456 | int been_active; /* Has trace session been active ? */ |
| 457 | struct file *file; /* File associated to session */ |
| 458 | struct list_head chan; /* Channel list head */ |
| 459 | struct list_head events; /* Event list head */ |
| 460 | struct list_head list; /* Session list */ |
| 461 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
| 462 | uuid_le uuid; /* Trace session unique ID */ |
| 463 | struct lttng_metadata_cache *metadata_cache; |
| 464 | struct lttng_pid_tracker *pid_tracker; |
| 465 | unsigned int metadata_dumped:1, |
| 466 | tstate:1; /* Transient enable state */ |
| 467 | /* List of enablers */ |
| 468 | struct list_head enablers_head; |
| 469 | /* Hash table of events */ |
| 470 | struct lttng_event_ht events_ht; |
| 471 | }; |
| 472 | |
| 473 | struct lttng_metadata_cache { |
| 474 | char *data; /* Metadata cache */ |
| 475 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ |
| 476 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ |
| 477 | struct kref refcount; /* Metadata cache usage */ |
| 478 | struct list_head metadata_stream; /* Metadata stream list */ |
| 479 | uuid_le uuid; /* Trace session unique ID (copy) */ |
| 480 | struct mutex lock; /* Produce/consume lock */ |
| 481 | uint64_t version; /* Current version of the metadata */ |
| 482 | }; |
| 483 | |
| 484 | void lttng_lock_sessions(void); |
| 485 | void lttng_unlock_sessions(void); |
| 486 | |
| 487 | struct list_head *lttng_get_probe_list_head(void); |
| 488 | |
| 489 | struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type, |
| 490 | struct lttng_kernel_event *event_param, |
| 491 | struct lttng_channel *chan); |
| 492 | |
| 493 | int lttng_enabler_enable(struct lttng_enabler *enabler); |
| 494 | int lttng_enabler_disable(struct lttng_enabler *enabler); |
| 495 | int lttng_fix_pending_events(void); |
| 496 | int lttng_session_active(void); |
| 497 | |
| 498 | struct lttng_session *lttng_session_create(void); |
| 499 | int lttng_session_enable(struct lttng_session *session); |
| 500 | int lttng_session_disable(struct lttng_session *session); |
| 501 | void lttng_session_destroy(struct lttng_session *session); |
| 502 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
| 503 | void metadata_cache_destroy(struct kref *kref); |
| 504 | |
| 505 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
| 506 | const char *transport_name, |
| 507 | void *buf_addr, |
| 508 | size_t subbuf_size, size_t num_subbuf, |
| 509 | unsigned int switch_timer_interval, |
| 510 | unsigned int read_timer_interval, |
| 511 | enum channel_type channel_type); |
| 512 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
| 513 | int overwrite, void *buf_addr, |
| 514 | size_t subbuf_size, size_t num_subbuf, |
| 515 | unsigned int switch_timer_interval, |
| 516 | unsigned int read_timer_interval); |
| 517 | |
| 518 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
| 519 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
| 520 | struct lttng_kernel_event *event_param, |
| 521 | void *filter, |
| 522 | const struct lttng_event_desc *event_desc, |
| 523 | enum lttng_kernel_instrumentation itype); |
| 524 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
| 525 | struct lttng_kernel_event *event_param, |
| 526 | void *filter, |
| 527 | const struct lttng_event_desc *event_desc, |
| 528 | enum lttng_kernel_instrumentation itype); |
| 529 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
| 530 | struct lttng_kernel_old_event *old_event_param, |
| 531 | void *filter, |
| 532 | const struct lttng_event_desc *internal_desc); |
| 533 | |
| 534 | int lttng_channel_enable(struct lttng_channel *channel); |
| 535 | int lttng_channel_disable(struct lttng_channel *channel); |
| 536 | int lttng_event_enable(struct lttng_event *event); |
| 537 | int lttng_event_disable(struct lttng_event *event); |
| 538 | |
| 539 | void lttng_transport_register(struct lttng_transport *transport); |
| 540 | void lttng_transport_unregister(struct lttng_transport *transport); |
| 541 | |
| 542 | void synchronize_trace(void); |
| 543 | int lttng_abi_init(void); |
| 544 | int lttng_abi_compat_old_init(void); |
| 545 | void lttng_abi_exit(void); |
| 546 | void lttng_abi_compat_old_exit(void); |
| 547 | |
| 548 | int lttng_probe_register(struct lttng_probe_desc *desc); |
| 549 | void lttng_probe_unregister(struct lttng_probe_desc *desc); |
| 550 | const struct lttng_event_desc *lttng_event_get(const char *name); |
| 551 | void lttng_event_put(const struct lttng_event_desc *desc); |
| 552 | int lttng_probes_init(void); |
| 553 | void lttng_probes_exit(void); |
| 554 | |
| 555 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
| 556 | struct channel *chan); |
| 557 | |
| 558 | int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node); |
| 559 | struct lttng_pid_tracker *lttng_pid_tracker_create(void); |
| 560 | void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf); |
| 561 | bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid); |
| 562 | int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid); |
| 563 | int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid); |
| 564 | |
| 565 | int lttng_session_track_pid(struct lttng_session *session, int pid); |
| 566 | int lttng_session_untrack_pid(struct lttng_session *session, int pid); |
| 567 | |
| 568 | int lttng_session_list_tracker_pids(struct lttng_session *session); |
| 569 | |
| 570 | void lttng_clock_ref(void); |
| 571 | void lttng_clock_unref(void); |
| 572 | |
| 573 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
| 574 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter); |
| 575 | int lttng_syscalls_unregister(struct lttng_channel *chan); |
| 576 | int lttng_syscall_filter_enable(struct lttng_channel *chan, |
| 577 | const char *name); |
| 578 | int lttng_syscall_filter_disable(struct lttng_channel *chan, |
| 579 | const char *name); |
| 580 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 581 | struct lttng_kernel_syscall_mask __user *usyscall_mask); |
| 582 | #else |
| 583 | static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
| 584 | { |
| 585 | return -ENOSYS; |
| 586 | } |
| 587 | |
| 588 | static inline int lttng_syscalls_unregister(struct lttng_channel *chan) |
| 589 | { |
| 590 | return 0; |
| 591 | } |
| 592 | |
| 593 | static inline int lttng_syscall_filter_enable(struct lttng_channel *chan, |
| 594 | const char *name) |
| 595 | { |
| 596 | return -ENOSYS; |
| 597 | } |
| 598 | |
| 599 | static inline int lttng_syscall_filter_disable(struct lttng_channel *chan, |
| 600 | const char *name) |
| 601 | { |
| 602 | return -ENOSYS; |
| 603 | } |
| 604 | |
| 605 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
| 606 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
| 607 | { |
| 608 | return -ENOSYS; |
| 609 | } |
| 610 | #endif |
| 611 | |
| 612 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
| 613 | int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, |
| 614 | struct lttng_kernel_filter_bytecode __user *bytecode); |
| 615 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, |
| 616 | struct lttng_enabler *enabler); |
| 617 | |
| 618 | extern struct lttng_ctx *lttng_static_ctx; |
| 619 | |
| 620 | int lttng_context_init(void); |
| 621 | void lttng_context_exit(void); |
| 622 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
| 623 | void lttng_context_update(struct lttng_ctx *ctx); |
| 624 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
| 625 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
| 626 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
| 627 | struct lttng_ctx_field *field); |
| 628 | void lttng_destroy_context(struct lttng_ctx *ctx); |
| 629 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
| 630 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
| 631 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
| 632 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
| 633 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
| 634 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
| 635 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); |
| 636 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); |
| 637 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); |
| 638 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); |
| 639 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
| 640 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
| 641 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); |
| 642 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) |
| 643 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); |
| 644 | #else |
| 645 | static inline |
| 646 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) |
| 647 | { |
| 648 | return -ENOSYS; |
| 649 | } |
| 650 | #endif |
| 651 | #ifdef CONFIG_PREEMPT_RT_FULL |
| 652 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); |
| 653 | #else |
| 654 | static inline |
| 655 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) |
| 656 | { |
| 657 | return -ENOSYS; |
| 658 | } |
| 659 | #endif |
| 660 | #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) |
| 661 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 662 | uint64_t config, |
| 663 | const char *name, |
| 664 | struct lttng_ctx **ctx); |
| 665 | #else |
| 666 | static inline |
| 667 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
| 668 | uint64_t config, |
| 669 | const char *name, |
| 670 | struct lttng_ctx **ctx) |
| 671 | { |
| 672 | return -ENOSYS; |
| 673 | } |
| 674 | #endif |
| 675 | |
| 676 | int lttng_logger_init(void); |
| 677 | void lttng_logger_exit(void); |
| 678 | |
| 679 | extern int lttng_statedump_start(struct lttng_session *session); |
| 680 | |
| 681 | #ifdef CONFIG_KPROBES |
| 682 | int lttng_kprobes_register(const char *name, |
| 683 | const char *symbol_name, |
| 684 | uint64_t offset, |
| 685 | uint64_t addr, |
| 686 | struct lttng_event *event); |
| 687 | void lttng_kprobes_unregister(struct lttng_event *event); |
| 688 | void lttng_kprobes_destroy_private(struct lttng_event *event); |
| 689 | #else |
| 690 | static inline |
| 691 | int lttng_kprobes_register(const char *name, |
| 692 | const char *symbol_name, |
| 693 | uint64_t offset, |
| 694 | uint64_t addr, |
| 695 | struct lttng_event *event) |
| 696 | { |
| 697 | return -ENOSYS; |
| 698 | } |
| 699 | |
| 700 | static inline |
| 701 | void lttng_kprobes_unregister(struct lttng_event *event) |
| 702 | { |
| 703 | } |
| 704 | |
| 705 | static inline |
| 706 | void lttng_kprobes_destroy_private(struct lttng_event *event) |
| 707 | { |
| 708 | } |
| 709 | #endif |
| 710 | |
| 711 | #ifdef CONFIG_KRETPROBES |
| 712 | int lttng_kretprobes_register(const char *name, |
| 713 | const char *symbol_name, |
| 714 | uint64_t offset, |
| 715 | uint64_t addr, |
| 716 | struct lttng_event *event_entry, |
| 717 | struct lttng_event *event_exit); |
| 718 | void lttng_kretprobes_unregister(struct lttng_event *event); |
| 719 | void lttng_kretprobes_destroy_private(struct lttng_event *event); |
| 720 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
| 721 | int enable); |
| 722 | #else |
| 723 | static inline |
| 724 | int lttng_kretprobes_register(const char *name, |
| 725 | const char *symbol_name, |
| 726 | uint64_t offset, |
| 727 | uint64_t addr, |
| 728 | struct lttng_event *event_entry, |
| 729 | struct lttng_event *event_exit) |
| 730 | { |
| 731 | return -ENOSYS; |
| 732 | } |
| 733 | |
| 734 | static inline |
| 735 | void lttng_kretprobes_unregister(struct lttng_event *event) |
| 736 | { |
| 737 | } |
| 738 | |
| 739 | static inline |
| 740 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
| 741 | { |
| 742 | } |
| 743 | |
| 744 | static inline |
| 745 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
| 746 | int enable) |
| 747 | { |
| 748 | return -ENOSYS; |
| 749 | } |
| 750 | #endif |
| 751 | |
| 752 | #ifdef CONFIG_DYNAMIC_FTRACE |
| 753 | int lttng_ftrace_register(const char *name, |
| 754 | const char *symbol_name, |
| 755 | struct lttng_event *event); |
| 756 | void lttng_ftrace_unregister(struct lttng_event *event); |
| 757 | void lttng_ftrace_destroy_private(struct lttng_event *event); |
| 758 | #else |
| 759 | static inline |
| 760 | int lttng_ftrace_register(const char *name, |
| 761 | const char *symbol_name, |
| 762 | struct lttng_event *event) |
| 763 | { |
| 764 | return -ENOSYS; |
| 765 | } |
| 766 | |
| 767 | static inline |
| 768 | void lttng_ftrace_unregister(struct lttng_event *event) |
| 769 | { |
| 770 | } |
| 771 | |
| 772 | static inline |
| 773 | void lttng_ftrace_destroy_private(struct lttng_event *event) |
| 774 | { |
| 775 | } |
| 776 | #endif |
| 777 | |
| 778 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
| 779 | |
| 780 | extern const struct file_operations lttng_tracepoint_list_fops; |
| 781 | extern const struct file_operations lttng_syscall_list_fops; |
| 782 | |
| 783 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) |
| 784 | #define TRACEPOINT_HAS_DATA_ARG |
| 785 | #endif |
| 786 | |
| 787 | #endif /* _LTTNG_EVENTS_H */ |