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a90917c3 MD |
1 | #ifndef _LTTNG_EVENTS_H |
2 | #define _LTTNG_EVENTS_H | |
11b5a3c2 | 3 | |
4e3c1b9b | 4 | /* |
a90917c3 | 5 | * lttng-events.h |
4e3c1b9b | 6 | * |
4e3c1b9b | 7 | * Holds LTTng per-session event registry. |
17baffe2 | 8 | * |
886d51a3 MD |
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 | |
4e3c1b9b MD |
24 | */ |
25 | ||
3a523f5b | 26 | #include <linux/version.h> |
4e3c1b9b | 27 | #include <linux/list.h> |
d6d808f3 | 28 | #include <linux/kprobes.h> |
d83004aa | 29 | #include <linux/kref.h> |
bbd023d6 MD |
30 | #include <wrapper/uuid.h> |
31 | #include <lttng-abi.h> | |
32 | #include <lttng-abi-old.h> | |
4e3c1b9b | 33 | |
06254b0f | 34 | #define lttng_is_signed_type(type) (((type)(-1)) < 0) |
9e7e4892 | 35 | |
a90917c3 MD |
36 | struct lttng_channel; |
37 | struct lttng_session; | |
d83004aa | 38 | struct lttng_metadata_cache; |
1c25284c | 39 | struct lib_ring_buffer_ctx; |
ba1f5986 | 40 | struct perf_event; |
833ad6a0 | 41 | struct perf_event_attr; |
3b731ab1 | 42 | struct lib_ring_buffer_config; |
4e3c1b9b | 43 | |
c0edae1d MD |
44 | /* Type description */ |
45 | ||
c0edae1d MD |
46 | enum abstract_types { |
47 | atype_integer, | |
48 | atype_enum, | |
49 | atype_array, | |
50 | atype_sequence, | |
51 | atype_string, | |
f513b2bf MD |
52 | atype_struct, |
53 | atype_array_compound, /* Array of compound types. */ | |
54 | atype_sequence_compound, /* Sequence of compound types. */ | |
c0edae1d MD |
55 | NR_ABSTRACT_TYPES, |
56 | }; | |
57 | ||
c0edae1d | 58 | enum lttng_string_encodings { |
e0a7a7c4 MD |
59 | lttng_encode_none = 0, |
60 | lttng_encode_UTF8 = 1, | |
61 | lttng_encode_ASCII = 2, | |
c0edae1d MD |
62 | NR_STRING_ENCODINGS, |
63 | }; | |
64 | ||
d83004aa JD |
65 | enum channel_type { |
66 | PER_CPU_CHANNEL, | |
67 | METADATA_CHANNEL, | |
68 | }; | |
69 | ||
c0edae1d MD |
70 | struct lttng_enum_entry { |
71 | unsigned long long start, end; /* start and end are inclusive */ | |
72 | const char *string; | |
73 | }; | |
74 | ||
43803cf2 MD |
75 | #define __type_integer(_type, _size, _alignment, _signedness, \ |
76 | _byte_order, _base, _encoding) \ | |
c099397a MD |
77 | { \ |
78 | .atype = atype_integer, \ | |
79 | .u.basic.integer = \ | |
80 | { \ | |
43803cf2 MD |
81 | .size = (_size) ? : sizeof(_type) * CHAR_BIT, \ |
82 | .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \ | |
83 | .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \ | |
84 | .reverse_byte_order = _byte_order != __BYTE_ORDER, \ | |
e0a7a7c4 | 85 | .base = _base, \ |
64c796d8 | 86 | .encoding = lttng_encode_##_encoding, \ |
c099397a MD |
87 | }, \ |
88 | } \ | |
89 | ||
90 | struct lttng_integer_type { | |
91 | unsigned int size; /* in bits */ | |
92 | unsigned short alignment; /* in bits */ | |
9cccf98a MD |
93 | unsigned int signedness:1, |
94 | reverse_byte_order:1; | |
e0a7a7c4 MD |
95 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ |
96 | enum lttng_string_encodings encoding; | |
c099397a MD |
97 | }; |
98 | ||
99 | union _lttng_basic_type { | |
100 | struct lttng_integer_type integer; | |
101 | struct { | |
102 | const char *name; | |
103 | } enumeration; | |
104 | struct { | |
105 | enum lttng_string_encodings encoding; | |
106 | } string; | |
107 | }; | |
108 | ||
109 | struct lttng_basic_type { | |
110 | enum abstract_types atype; | |
111 | union { | |
112 | union _lttng_basic_type basic; | |
113 | } u; | |
c0edae1d MD |
114 | }; |
115 | ||
116 | struct lttng_type { | |
117 | enum abstract_types atype; | |
c0edae1d | 118 | union { |
c099397a | 119 | union _lttng_basic_type basic; |
c0edae1d | 120 | struct { |
c099397a | 121 | struct lttng_basic_type elem_type; |
c0edae1d | 122 | unsigned int length; /* num. elems. */ |
43803cf2 | 123 | unsigned int elem_alignment; /* alignment override */ |
c0edae1d MD |
124 | } array; |
125 | struct { | |
c099397a MD |
126 | struct lttng_basic_type length_type; |
127 | struct lttng_basic_type elem_type; | |
43803cf2 | 128 | unsigned int elem_alignment; /* alignment override */ |
c0edae1d | 129 | } sequence; |
f513b2bf MD |
130 | struct { |
131 | uint32_t nr_fields; | |
132 | struct lttng_event_field *fields; /* Array of fields. */ | |
133 | } _struct; | |
134 | struct { | |
135 | struct lttng_type *elem_type; | |
136 | unsigned int length; /* num. elems. */ | |
137 | } array_compound; | |
138 | struct { | |
139 | struct lttng_type *elem_type; | |
140 | const char *length_name; | |
141 | } sequence_compound; | |
c0edae1d | 142 | } u; |
c099397a MD |
143 | }; |
144 | ||
145 | struct lttng_enum { | |
146 | const char *name; | |
147 | struct lttng_type container_type; | |
148 | const struct lttng_enum_entry *entries; | |
149 | unsigned int len; | |
150 | }; | |
c0edae1d MD |
151 | |
152 | /* Event field description */ | |
153 | ||
154 | struct lttng_event_field { | |
155 | const char *name; | |
f17701fb | 156 | struct lttng_type type; |
f127e61e MD |
157 | unsigned int nowrite:1, /* do not write into trace */ |
158 | user:1; /* fetch from user-space */ | |
c0edae1d MD |
159 | }; |
160 | ||
07dfc1d0 MD |
161 | union lttng_ctx_value { |
162 | int64_t s64; | |
163 | const char *str; | |
164 | double d; | |
165 | }; | |
166 | ||
2001023e MD |
167 | /* |
168 | * We need to keep this perf counter field separately from struct | |
169 | * lttng_ctx_field because cpu hotplug needs fixed-location addresses. | |
170 | */ | |
171 | struct lttng_perf_counter_field { | |
172 | struct notifier_block nb; | |
173 | int hp_enable; | |
174 | struct perf_event_attr *attr; | |
175 | struct perf_event **e; /* per-cpu array */ | |
176 | }; | |
177 | ||
79150a49 JD |
178 | struct lttng_probe_ctx { |
179 | struct lttng_event *event; | |
180 | uint8_t interruptible; | |
181 | }; | |
182 | ||
ba1f5986 | 183 | struct lttng_ctx_field { |
8070f5c0 | 184 | struct lttng_event_field event_field; |
f1676205 MD |
185 | size_t (*get_size)(size_t offset); |
186 | void (*record)(struct lttng_ctx_field *field, | |
187 | struct lib_ring_buffer_ctx *ctx, | |
a90917c3 | 188 | struct lttng_channel *chan); |
07dfc1d0 | 189 | void (*get_value)(struct lttng_ctx_field *field, |
79150a49 | 190 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 | 191 | union lttng_ctx_value *value); |
ba1f5986 | 192 | union { |
2001023e | 193 | struct lttng_perf_counter_field *perf_counter; |
ba1f5986 | 194 | } u; |
2dccf128 | 195 | void (*destroy)(struct lttng_ctx_field *field); |
ba1f5986 MD |
196 | }; |
197 | ||
198 | struct lttng_ctx { | |
833ad6a0 | 199 | struct lttng_ctx_field *fields; |
0d1a681e | 200 | unsigned int nr_fields; |
ba1f5986 | 201 | unsigned int allocated_fields; |
a9dd15da | 202 | size_t largest_align; /* in bytes */ |
0d1a681e MD |
203 | }; |
204 | ||
205 | struct lttng_event_desc { | |
a26a7e4f MD |
206 | const char *name; /* lttng-modules name */ |
207 | const char *kname; /* Linux kernel name (tracepoints) */ | |
c0edae1d | 208 | void *probe_callback; |
0d1a681e MD |
209 | const struct lttng_event_ctx *ctx; /* context */ |
210 | const struct lttng_event_field *fields; /* event payload */ | |
c0edae1d | 211 | unsigned int nr_fields; |
dc7f600a | 212 | struct module *owner; |
c0edae1d MD |
213 | }; |
214 | ||
85a9ca7f | 215 | struct lttng_probe_desc { |
3c997079 | 216 | const char *provider; |
f7bdf4db | 217 | const struct lttng_event_desc **event_desc; |
85a9ca7f MD |
218 | unsigned int nr_events; |
219 | struct list_head head; /* chain registered probes */ | |
3c997079 MD |
220 | struct list_head lazy_init_head; |
221 | int lazy; /* lazy registration */ | |
85a9ca7f MD |
222 | }; |
223 | ||
7371f44c MD |
224 | struct lttng_krp; /* Kretprobe handling */ |
225 | ||
3c997079 MD |
226 | enum lttng_event_type { |
227 | LTTNG_TYPE_EVENT = 0, | |
228 | LTTNG_TYPE_ENABLER = 1, | |
229 | }; | |
230 | ||
07dfc1d0 MD |
231 | struct lttng_filter_bytecode_node { |
232 | struct list_head node; | |
233 | struct lttng_enabler *enabler; | |
234 | /* | |
235 | * struct lttng_kernel_filter_bytecode has var. sized array, must be | |
236 | * last field. | |
237 | */ | |
238 | struct lttng_kernel_filter_bytecode bc; | |
239 | }; | |
240 | ||
241 | /* | |
242 | * Filter return value masks. | |
243 | */ | |
244 | enum lttng_filter_ret { | |
245 | LTTNG_FILTER_DISCARD = 0, | |
246 | LTTNG_FILTER_RECORD_FLAG = (1ULL << 0), | |
247 | /* Other bits are kept for future use. */ | |
248 | }; | |
249 | ||
250 | struct lttng_bytecode_runtime { | |
251 | /* Associated bytecode */ | |
252 | struct lttng_filter_bytecode_node *bc; | |
79150a49 JD |
253 | uint64_t (*filter)(void *filter_data, struct lttng_probe_ctx *lttng_probe_ctx, |
254 | const char *filter_stack_data); | |
07dfc1d0 MD |
255 | int link_failed; |
256 | struct list_head node; /* list of bytecode runtime in event */ | |
257 | }; | |
258 | ||
3c997079 MD |
259 | /* |
260 | * Objects in a linked-list of enablers, owned by an event. | |
261 | */ | |
262 | struct lttng_enabler_ref { | |
263 | struct list_head node; /* enabler ref list */ | |
264 | struct lttng_enabler *ref; /* backward ref */ | |
265 | }; | |
266 | ||
85a9ca7f | 267 | /* |
a90917c3 | 268 | * lttng_event structure is referred to by the tracing fast path. It must be |
85a9ca7f MD |
269 | * kept small. |
270 | */ | |
a90917c3 | 271 | struct lttng_event { |
3c997079 | 272 | enum lttng_event_type evtype; /* First field. */ |
85a9ca7f | 273 | unsigned int id; |
a90917c3 | 274 | struct lttng_channel *chan; |
e64957da | 275 | int enabled; |
d3dbe23c | 276 | const struct lttng_event_desc *desc; |
85a9ca7f | 277 | void *filter; |
f1676205 | 278 | struct lttng_ctx *ctx; |
38d024ae | 279 | enum lttng_kernel_instrumentation instrumentation; |
d6d808f3 MD |
280 | union { |
281 | struct { | |
282 | struct kprobe kp; | |
283 | char *symbol_name; | |
284 | } kprobe; | |
7371f44c MD |
285 | struct { |
286 | struct lttng_krp *lttng_krp; | |
287 | char *symbol_name; | |
288 | } kretprobe; | |
e0a7a7c4 MD |
289 | struct { |
290 | char *symbol_name; | |
291 | } ftrace; | |
d6d808f3 | 292 | } u; |
3c997079 | 293 | struct list_head list; /* Event list in session */ |
9cccf98a | 294 | unsigned int metadata_dumped:1; |
3c997079 MD |
295 | |
296 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
297 | struct list_head enablers_ref_head; | |
298 | struct hlist_node hlist; /* session ht of events */ | |
299 | int registered; /* has reg'd tracepoint probe */ | |
07dfc1d0 MD |
300 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
301 | struct list_head bytecode_runtime_head; | |
302 | int has_enablers_without_bytecode; | |
3c997079 MD |
303 | }; |
304 | ||
305 | enum lttng_enabler_type { | |
306 | LTTNG_ENABLER_WILDCARD, | |
307 | LTTNG_ENABLER_NAME, | |
308 | }; | |
309 | ||
310 | /* | |
311 | * Enabler field, within whatever object is enabling an event. Target of | |
312 | * backward reference. | |
313 | */ | |
314 | struct lttng_enabler { | |
315 | enum lttng_event_type evtype; /* First field. */ | |
316 | ||
317 | enum lttng_enabler_type type; | |
318 | ||
319 | struct list_head node; /* per-session list of enablers */ | |
07dfc1d0 MD |
320 | /* head list of struct lttng_ust_filter_bytecode_node */ |
321 | struct list_head filter_bytecode_head; | |
3c997079 MD |
322 | |
323 | struct lttng_kernel_event event_param; | |
324 | struct lttng_channel *chan; | |
325 | struct lttng_ctx *ctx; | |
326 | unsigned int enabled:1; | |
85a9ca7f MD |
327 | }; |
328 | ||
a90917c3 | 329 | struct lttng_channel_ops { |
85a9ca7f | 330 | struct channel *(*channel_create)(const char *name, |
a90917c3 | 331 | struct lttng_channel *lttng_chan, |
85a9ca7f MD |
332 | void *buf_addr, |
333 | size_t subbuf_size, size_t num_subbuf, | |
334 | unsigned int switch_timer_interval, | |
335 | unsigned int read_timer_interval); | |
336 | void (*channel_destroy)(struct channel *chan); | |
337 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); | |
f71ecafa | 338 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
85a9ca7f | 339 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
4e1f08f4 | 340 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
64c796d8 | 341 | uint32_t event_id); |
85a9ca7f MD |
342 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
343 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, | |
344 | size_t len); | |
4ea00e4f JD |
345 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
346 | const void *src, size_t len); | |
58aa5d24 MD |
347 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
348 | int c, size_t len); | |
16f78f3a MD |
349 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
350 | size_t len); | |
351 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, | |
352 | const char __user *src, size_t len); | |
1ec3f75a MD |
353 | /* |
354 | * packet_avail_size returns the available size in the current | |
355 | * packet. Note that the size returned is only a hint, since it | |
356 | * may change due to concurrent writes. | |
357 | */ | |
358 | size_t (*packet_avail_size)(struct channel *chan); | |
71c1d843 | 359 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
24cedcfe MD |
360 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
361 | int (*is_finalized)(struct channel *chan); | |
254ec7bc | 362 | int (*is_disabled)(struct channel *chan); |
3b731ab1 JD |
363 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
364 | struct lib_ring_buffer *bufb, | |
365 | uint64_t *timestamp_begin); | |
366 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, | |
367 | struct lib_ring_buffer *bufb, | |
368 | uint64_t *timestamp_end); | |
369 | int (*events_discarded) (const struct lib_ring_buffer_config *config, | |
370 | struct lib_ring_buffer *bufb, | |
371 | uint64_t *events_discarded); | |
372 | int (*content_size) (const struct lib_ring_buffer_config *config, | |
373 | struct lib_ring_buffer *bufb, | |
374 | uint64_t *content_size); | |
375 | int (*packet_size) (const struct lib_ring_buffer_config *config, | |
376 | struct lib_ring_buffer *bufb, | |
377 | uint64_t *packet_size); | |
378 | int (*stream_id) (const struct lib_ring_buffer_config *config, | |
379 | struct lib_ring_buffer *bufb, | |
380 | uint64_t *stream_id); | |
2348ca17 JD |
381 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
382 | struct lib_ring_buffer *bufb, | |
383 | uint64_t *ts); | |
5b3cf4f9 JD |
384 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
385 | struct lib_ring_buffer *bufb, | |
386 | uint64_t *seq); | |
5594698f JD |
387 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
388 | struct lib_ring_buffer *bufb, | |
389 | uint64_t *id); | |
85a9ca7f MD |
390 | }; |
391 | ||
a90917c3 | 392 | struct lttng_transport { |
a33c9927 MD |
393 | char *name; |
394 | struct module *owner; | |
395 | struct list_head node; | |
a90917c3 | 396 | struct lttng_channel_ops ops; |
a33c9927 MD |
397 | }; |
398 | ||
80f87dd2 MD |
399 | struct lttng_syscall_filter; |
400 | ||
3c997079 MD |
401 | #define LTTNG_EVENT_HT_BITS 12 |
402 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) | |
403 | ||
404 | struct lttng_event_ht { | |
405 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; | |
406 | }; | |
407 | ||
a90917c3 | 408 | struct lttng_channel { |
c099397a | 409 | unsigned int id; |
85a9ca7f | 410 | struct channel *chan; /* Channel buffers */ |
e64957da | 411 | int enabled; |
f1676205 | 412 | struct lttng_ctx *ctx; |
85a9ca7f | 413 | /* Event ID management */ |
a90917c3 | 414 | struct lttng_session *session; |
85a9ca7f MD |
415 | struct file *file; /* File associated to channel */ |
416 | unsigned int free_event_id; /* Next event ID to allocate */ | |
417 | struct list_head list; /* Channel list */ | |
a90917c3 MD |
418 | struct lttng_channel_ops *ops; |
419 | struct lttng_transport *transport; | |
420 | struct lttng_event **sc_table; /* for syscall tracing */ | |
421 | struct lttng_event **compat_sc_table; | |
5b7ac358 MD |
422 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
423 | struct lttng_event **compat_sc_exit_table; | |
a90917c3 MD |
424 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
425 | struct lttng_event *sc_compat_unknown; | |
5b7ac358 MD |
426 | struct lttng_event *sc_exit_unknown; |
427 | struct lttng_event *compat_sc_exit_unknown; | |
80f87dd2 | 428 | struct lttng_syscall_filter *sc_filter; |
9115fbdc | 429 | int header_type; /* 0: unset, 1: compact, 2: large */ |
d83004aa | 430 | enum channel_type channel_type; |
80f87dd2 MD |
431 | unsigned int metadata_dumped:1, |
432 | sys_enter_registered:1, | |
433 | sys_exit_registered:1, | |
3c997079 MD |
434 | syscall_all:1, |
435 | tstate:1; /* Transient enable state */ | |
85a9ca7f MD |
436 | }; |
437 | ||
d83004aa JD |
438 | struct lttng_metadata_stream { |
439 | void *priv; /* Ring buffer private data */ | |
440 | struct lttng_metadata_cache *metadata_cache; | |
f613e3e6 MD |
441 | unsigned int metadata_in; /* Bytes read from the cache */ |
442 | unsigned int metadata_out; /* Bytes consumed from stream */ | |
d83004aa JD |
443 | int finalized; /* Has channel been finalized */ |
444 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ | |
445 | struct list_head list; /* Stream list */ | |
b3b8072b | 446 | struct lttng_transport *transport; |
9616f0bf | 447 | uint64_t version; /* Current version of the metadata cache */ |
d83004aa JD |
448 | }; |
449 | ||
114667d5 MD |
450 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
451 | ||
452 | struct lttng_dynamic_len_stack { | |
453 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; | |
454 | size_t offset; | |
455 | }; | |
456 | ||
457 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); | |
e0130fab MD |
458 | |
459 | /* | |
460 | * struct lttng_pid_tracker declared in header due to deferencing of *v | |
461 | * in RCU_INITIALIZER(v). | |
462 | */ | |
463 | #define LTTNG_PID_HASH_BITS 6 | |
464 | #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS) | |
465 | ||
466 | struct lttng_pid_tracker { | |
467 | struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE]; | |
468 | }; | |
469 | ||
7e6f9ef6 MD |
470 | struct lttng_pid_hash_node { |
471 | struct hlist_node hlist; | |
472 | int pid; | |
473 | }; | |
474 | ||
a90917c3 | 475 | struct lttng_session { |
85a9ca7f | 476 | int active; /* Is trace session active ? */ |
8070f5c0 | 477 | int been_active; /* Has trace session been active ? */ |
85a9ca7f MD |
478 | struct file *file; /* File associated to session */ |
479 | struct list_head chan; /* Channel list head */ | |
480 | struct list_head events; /* Event list head */ | |
481 | struct list_head list; /* Session list */ | |
c099397a | 482 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
d793d5e1 | 483 | uuid_le uuid; /* Trace session unique ID */ |
d83004aa | 484 | struct lttng_metadata_cache *metadata_cache; |
e0130fab | 485 | struct lttng_pid_tracker *pid_tracker; |
3c997079 MD |
486 | unsigned int metadata_dumped:1, |
487 | tstate:1; /* Transient enable state */ | |
488 | /* List of enablers */ | |
489 | struct list_head enablers_head; | |
490 | /* Hash table of events */ | |
491 | struct lttng_event_ht events_ht; | |
85a9ca7f MD |
492 | }; |
493 | ||
d83004aa JD |
494 | struct lttng_metadata_cache { |
495 | char *data; /* Metadata cache */ | |
496 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ | |
497 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ | |
498 | struct kref refcount; /* Metadata cache usage */ | |
499 | struct list_head metadata_stream; /* Metadata stream list */ | |
a36580d5 | 500 | uuid_le uuid; /* Trace session unique ID (copy) */ |
9616f0bf JD |
501 | struct mutex lock; /* Produce/consume lock */ |
502 | uint64_t version; /* Current version of the metadata */ | |
d83004aa JD |
503 | }; |
504 | ||
3c997079 MD |
505 | void lttng_lock_sessions(void); |
506 | void lttng_unlock_sessions(void); | |
507 | ||
508 | struct list_head *lttng_get_probe_list_head(void); | |
509 | ||
510 | struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type, | |
511 | struct lttng_kernel_event *event_param, | |
512 | struct lttng_channel *chan); | |
513 | ||
514 | int lttng_enabler_enable(struct lttng_enabler *enabler); | |
515 | int lttng_enabler_disable(struct lttng_enabler *enabler); | |
516 | int lttng_fix_pending_events(void); | |
517 | int lttng_session_active(void); | |
518 | ||
a90917c3 MD |
519 | struct lttng_session *lttng_session_create(void); |
520 | int lttng_session_enable(struct lttng_session *session); | |
521 | int lttng_session_disable(struct lttng_session *session); | |
522 | void lttng_session_destroy(struct lttng_session *session); | |
9616f0bf | 523 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
d83004aa | 524 | void metadata_cache_destroy(struct kref *kref); |
4e3c1b9b | 525 | |
a90917c3 | 526 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
5dbbdb43 MD |
527 | const char *transport_name, |
528 | void *buf_addr, | |
529 | size_t subbuf_size, size_t num_subbuf, | |
530 | unsigned int switch_timer_interval, | |
d83004aa JD |
531 | unsigned int read_timer_interval, |
532 | enum channel_type channel_type); | |
a90917c3 | 533 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
4e3c1b9b MD |
534 | int overwrite, void *buf_addr, |
535 | size_t subbuf_size, size_t num_subbuf, | |
536 | unsigned int switch_timer_interval, | |
537 | unsigned int read_timer_interval); | |
4e3c1b9b | 538 | |
d83004aa | 539 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
a90917c3 | 540 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
3c997079 MD |
541 | struct lttng_kernel_event *event_param, |
542 | void *filter, | |
543 | const struct lttng_event_desc *event_desc, | |
544 | enum lttng_kernel_instrumentation itype); | |
33a39a3c MD |
545 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
546 | struct lttng_kernel_event *event_param, | |
547 | void *filter, | |
548 | const struct lttng_event_desc *event_desc, | |
549 | enum lttng_kernel_instrumentation itype); | |
6dccd6c1 JD |
550 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
551 | struct lttng_kernel_old_event *old_event_param, | |
552 | void *filter, | |
553 | const struct lttng_event_desc *internal_desc); | |
c0e31d2e | 554 | |
a90917c3 MD |
555 | int lttng_channel_enable(struct lttng_channel *channel); |
556 | int lttng_channel_disable(struct lttng_channel *channel); | |
557 | int lttng_event_enable(struct lttng_event *event); | |
558 | int lttng_event_disable(struct lttng_event *event); | |
e64957da | 559 | |
a90917c3 MD |
560 | void lttng_transport_register(struct lttng_transport *transport); |
561 | void lttng_transport_unregister(struct lttng_transport *transport); | |
11b5a3c2 | 562 | |
360f38ea | 563 | void synchronize_trace(void); |
80996790 | 564 | int lttng_abi_init(void); |
6dccd6c1 | 565 | int lttng_abi_compat_old_init(void); |
80996790 | 566 | void lttng_abi_exit(void); |
6dccd6c1 | 567 | void lttng_abi_compat_old_exit(void); |
1c25284c | 568 | |
a90917c3 MD |
569 | int lttng_probe_register(struct lttng_probe_desc *desc); |
570 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
571 | const struct lttng_event_desc *lttng_event_get(const char *name); | |
572 | void lttng_event_put(const struct lttng_event_desc *desc); | |
573 | int lttng_probes_init(void); | |
574 | void lttng_probes_exit(void); | |
1ec65de1 | 575 | |
b3b8072b MD |
576 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
577 | struct channel *chan); | |
d83004aa | 578 | |
7e6f9ef6 | 579 | int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node); |
e0130fab MD |
580 | struct lttng_pid_tracker *lttng_pid_tracker_create(void); |
581 | void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf); | |
582 | bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid); | |
583 | int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid); | |
584 | int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid); | |
585 | ||
586 | int lttng_session_track_pid(struct lttng_session *session, int pid); | |
587 | int lttng_session_untrack_pid(struct lttng_session *session, int pid); | |
588 | ||
7e6f9ef6 MD |
589 | int lttng_session_list_tracker_pids(struct lttng_session *session); |
590 | ||
2754583e MD |
591 | void lttng_clock_ref(void); |
592 | void lttng_clock_unref(void); | |
593 | ||
3a523f5b | 594 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
a90917c3 MD |
595 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter); |
596 | int lttng_syscalls_unregister(struct lttng_channel *chan); | |
80f87dd2 MD |
597 | int lttng_syscall_filter_enable(struct lttng_channel *chan, |
598 | const char *name); | |
599 | int lttng_syscall_filter_disable(struct lttng_channel *chan, | |
600 | const char *name); | |
12e579db MD |
601 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
602 | struct lttng_kernel_syscall_mask __user *usyscall_mask); | |
1ec65de1 | 603 | #else |
a90917c3 | 604 | static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
1ec65de1 MD |
605 | { |
606 | return -ENOSYS; | |
607 | } | |
608 | ||
a90917c3 | 609 | static inline int lttng_syscalls_unregister(struct lttng_channel *chan) |
1ec65de1 MD |
610 | { |
611 | return 0; | |
612 | } | |
80f87dd2 | 613 | |
f127e61e | 614 | static inline int lttng_syscall_filter_enable(struct lttng_channel *chan, |
80f87dd2 MD |
615 | const char *name) |
616 | { | |
617 | return -ENOSYS; | |
618 | } | |
619 | ||
f127e61e | 620 | static inline int lttng_syscall_filter_disable(struct lttng_channel *chan, |
80f87dd2 MD |
621 | const char *name) |
622 | { | |
623 | return -ENOSYS; | |
624 | } | |
12e579db | 625 | |
f127e61e | 626 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
12e579db MD |
627 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
628 | { | |
629 | return -ENOSYS; | |
630 | } | |
1ec65de1 MD |
631 | #endif |
632 | ||
07dfc1d0 MD |
633 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
634 | int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, | |
635 | struct lttng_kernel_filter_bytecode __user *bytecode); | |
f127e61e MD |
636 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, |
637 | struct lttng_enabler *enabler); | |
07dfc1d0 | 638 | |
114667d5 MD |
639 | int lttng_probes_init(void); |
640 | ||
07dfc1d0 MD |
641 | extern struct lttng_ctx *lttng_static_ctx; |
642 | ||
643 | int lttng_context_init(void); | |
644 | void lttng_context_exit(void); | |
2dccf128 | 645 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
a9dd15da | 646 | void lttng_context_update(struct lttng_ctx *ctx); |
44252f0f | 647 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
07dfc1d0 | 648 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8289661d MD |
649 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
650 | struct lttng_ctx_field *field); | |
2dccf128 | 651 | void lttng_destroy_context(struct lttng_ctx *ctx); |
8070f5c0 | 652 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
b3699d90 | 653 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
a2563e83 | 654 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
a8ad3613 | 655 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
53f1f0ca | 656 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
b64bc438 MD |
657 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
658 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); | |
659 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); | |
660 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); | |
661 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); | |
975da2c0 | 662 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
79150a49 JD |
663 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
664 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); | |
665 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) | |
666 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); | |
667 | #else | |
668 | static inline | |
669 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) | |
670 | { | |
671 | return -ENOSYS; | |
672 | } | |
673 | #endif | |
674 | #ifdef CONFIG_PREEMPT_RT_FULL | |
675 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); | |
676 | #else | |
677 | static inline | |
678 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) | |
679 | { | |
680 | return -ENOSYS; | |
681 | } | |
682 | #endif | |
41c3c24e | 683 | #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) |
c24a0d71 MD |
684 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
685 | uint64_t config, | |
686 | const char *name, | |
687 | struct lttng_ctx **ctx); | |
1d443b34 MD |
688 | #else |
689 | static inline | |
690 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
691 | uint64_t config, | |
692 | const char *name, | |
693 | struct lttng_ctx **ctx) | |
694 | { | |
695 | return -ENOSYS; | |
696 | } | |
697 | #endif | |
02119ee5 | 698 | |
0c956676 MD |
699 | int lttng_logger_init(void); |
700 | void lttng_logger_exit(void); | |
701 | ||
c337ddc2 MD |
702 | extern int lttng_statedump_start(struct lttng_session *session); |
703 | ||
acd614cc | 704 | #ifdef CONFIG_KPROBES |
f17701fb MD |
705 | int lttng_kprobes_register(const char *name, |
706 | const char *symbol_name, | |
707 | uint64_t offset, | |
708 | uint64_t addr, | |
a90917c3 MD |
709 | struct lttng_event *event); |
710 | void lttng_kprobes_unregister(struct lttng_event *event); | |
711 | void lttng_kprobes_destroy_private(struct lttng_event *event); | |
acd614cc MD |
712 | #else |
713 | static inline | |
714 | int lttng_kprobes_register(const char *name, | |
715 | const char *symbol_name, | |
716 | uint64_t offset, | |
717 | uint64_t addr, | |
a90917c3 | 718 | struct lttng_event *event) |
acd614cc MD |
719 | { |
720 | return -ENOSYS; | |
721 | } | |
722 | ||
25f53c39 | 723 | static inline |
a90917c3 | 724 | void lttng_kprobes_unregister(struct lttng_event *event) |
acd614cc MD |
725 | { |
726 | } | |
edeb3137 MD |
727 | |
728 | static inline | |
a90917c3 | 729 | void lttng_kprobes_destroy_private(struct lttng_event *event) |
edeb3137 MD |
730 | { |
731 | } | |
acd614cc | 732 | #endif |
d6d808f3 | 733 | |
7371f44c MD |
734 | #ifdef CONFIG_KRETPROBES |
735 | int lttng_kretprobes_register(const char *name, | |
736 | const char *symbol_name, | |
737 | uint64_t offset, | |
738 | uint64_t addr, | |
a90917c3 MD |
739 | struct lttng_event *event_entry, |
740 | struct lttng_event *event_exit); | |
741 | void lttng_kretprobes_unregister(struct lttng_event *event); | |
742 | void lttng_kretprobes_destroy_private(struct lttng_event *event); | |
a0493bef MD |
743 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
744 | int enable); | |
7371f44c MD |
745 | #else |
746 | static inline | |
747 | int lttng_kretprobes_register(const char *name, | |
748 | const char *symbol_name, | |
749 | uint64_t offset, | |
750 | uint64_t addr, | |
a90917c3 MD |
751 | struct lttng_event *event_entry, |
752 | struct lttng_event *event_exit) | |
7371f44c MD |
753 | { |
754 | return -ENOSYS; | |
755 | } | |
756 | ||
757 | static inline | |
a90917c3 | 758 | void lttng_kretprobes_unregister(struct lttng_event *event) |
7371f44c MD |
759 | { |
760 | } | |
761 | ||
762 | static inline | |
a90917c3 | 763 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
7371f44c MD |
764 | { |
765 | } | |
a0493bef MD |
766 | |
767 | static inline | |
768 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, | |
769 | int enable) | |
770 | { | |
771 | return -ENOSYS; | |
772 | } | |
7371f44c MD |
773 | #endif |
774 | ||
e0a7a7c4 MD |
775 | #ifdef CONFIG_DYNAMIC_FTRACE |
776 | int lttng_ftrace_register(const char *name, | |
777 | const char *symbol_name, | |
a90917c3 MD |
778 | struct lttng_event *event); |
779 | void lttng_ftrace_unregister(struct lttng_event *event); | |
780 | void lttng_ftrace_destroy_private(struct lttng_event *event); | |
e0a7a7c4 MD |
781 | #else |
782 | static inline | |
783 | int lttng_ftrace_register(const char *name, | |
784 | const char *symbol_name, | |
a90917c3 | 785 | struct lttng_event *event) |
e0a7a7c4 | 786 | { |
acd614cc | 787 | return -ENOSYS; |
e0a7a7c4 MD |
788 | } |
789 | ||
790 | static inline | |
a90917c3 | 791 | void lttng_ftrace_unregister(struct lttng_event *event) |
e0a7a7c4 MD |
792 | { |
793 | } | |
edeb3137 MD |
794 | |
795 | static inline | |
a90917c3 | 796 | void lttng_ftrace_destroy_private(struct lttng_event *event) |
edeb3137 MD |
797 | { |
798 | } | |
e0a7a7c4 | 799 | #endif |
271b6681 | 800 | |
3db41b2c | 801 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
57105fc2 | 802 | |
271b6681 | 803 | extern const struct file_operations lttng_tracepoint_list_fops; |
2d2464bd | 804 | extern const struct file_operations lttng_syscall_list_fops; |
271b6681 | 805 | |
ef200626 MD |
806 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) |
807 | #define TRACEPOINT_HAS_DATA_ARG | |
808 | #endif | |
809 | ||
a90917c3 | 810 | #endif /* _LTTNG_EVENTS_H */ |