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b7cdc182 | 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
9f36eaed | 2 | * |
2df37e95 | 3 | * lttng/events.h |
4e3c1b9b | 4 | * |
4e3c1b9b | 5 | * Holds LTTng per-session event registry. |
17baffe2 | 6 | * |
886d51a3 | 7 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4e3c1b9b MD |
8 | */ |
9 | ||
9f36eaed MJ |
10 | #ifndef _LTTNG_EVENTS_H |
11 | #define _LTTNG_EVENTS_H | |
12 | ||
5f4c791e | 13 | #include <lttng/kernel-version.h> |
4e3c1b9b | 14 | #include <linux/list.h> |
d6d808f3 | 15 | #include <linux/kprobes.h> |
d83004aa | 16 | #include <linux/kref.h> |
41f229dc | 17 | #include <linux/uuid.h> |
754d534a | 18 | #include <linux/irq_work.h> |
149b9a9d | 19 | #include <wrapper/uprobes.h> |
2df37e95 MD |
20 | #include <lttng/cpuhotplug.h> |
21 | #include <lttng/tracer.h> | |
22 | #include <lttng/abi.h> | |
23 | #include <lttng/abi-old.h> | |
24 | #include <lttng/endian.h> | |
4e3c1b9b | 25 | |
e97dc605 | 26 | #define lttng_is_signed_type(type) (((type) -1) < (type) 1) |
9e7e4892 | 27 | |
a90917c3 | 28 | struct lttng_channel; |
a40e3229 | 29 | struct lttng_kernel_session; |
e27e4381 | 30 | struct lttng_kernel_ring_buffer_ctx; |
4e3c1b9b | 31 | |
c0edae1d MD |
32 | /* Type description */ |
33 | ||
12bb2edb MD |
34 | enum lttng_kernel_type { |
35 | lttng_kernel_type_integer, | |
36 | lttng_kernel_type_string, | |
437d5aa5 MD |
37 | lttng_kernel_type_enum, |
38 | lttng_kernel_type_array, | |
39 | lttng_kernel_type_sequence, | |
40 | lttng_kernel_type_struct, | |
41 | lttng_kernel_type_variant, | |
12bb2edb | 42 | NR_LTTNG_KERNEL_TYPES, |
c0edae1d MD |
43 | }; |
44 | ||
28cbcb59 MD |
45 | enum lttng_kernel_string_encoding { |
46 | lttng_kernel_string_encoding_none = 0, | |
47 | lttng_kernel_string_encoding_UTF8 = 1, | |
48 | lttng_kernel_string_encoding_ASCII = 2, | |
49 | NR_LTTNG_KERNEL_STRING_ENCODING, | |
c0edae1d MD |
50 | }; |
51 | ||
d83004aa JD |
52 | enum channel_type { |
53 | PER_CPU_CHANNEL, | |
54 | METADATA_CHANNEL, | |
55 | }; | |
56 | ||
a28cc520 | 57 | struct lttng_kernel_enum_value { |
141ddf28 MD |
58 | unsigned long long value; |
59 | unsigned int signedness:1; | |
60 | }; | |
61 | ||
a28cc520 MD |
62 | struct lttng_kernel_enum_entry { |
63 | struct lttng_kernel_enum_value start, end; /* start and end are inclusive */ | |
c0edae1d | 64 | const char *string; |
08ad1061 PP |
65 | struct { |
66 | unsigned int is_auto:1; | |
67 | } options; | |
c0edae1d MD |
68 | }; |
69 | ||
437d5aa5 MD |
70 | /* |
71 | * struct lttng_kernel_type_common is fixed-size. Its children inherits | |
72 | * from it by embedding struct lttng_kernel_type_common as its first field. | |
73 | */ | |
74 | struct lttng_kernel_type_common { | |
75 | enum lttng_kernel_type type; | |
76 | }; | |
77 | ||
78 | struct lttng_kernel_type_integer { | |
79 | struct lttng_kernel_type_common parent; | |
c099397a MD |
80 | unsigned int size; /* in bits */ |
81 | unsigned short alignment; /* in bits */ | |
9cccf98a MD |
82 | unsigned int signedness:1, |
83 | reverse_byte_order:1; | |
e0a7a7c4 | 84 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ |
437d5aa5 MD |
85 | }; |
86 | ||
87 | struct lttng_kernel_type_string { | |
88 | struct lttng_kernel_type_common parent; | |
28cbcb59 | 89 | enum lttng_kernel_string_encoding encoding; |
c099397a MD |
90 | }; |
91 | ||
437d5aa5 MD |
92 | struct lttng_kernel_type_enum { |
93 | struct lttng_kernel_type_common parent; | |
94 | const struct lttng_kernel_enum_desc *desc; /* Enumeration mapping */ | |
95 | const struct lttng_kernel_type_common *container_type; | |
96 | }; | |
97 | ||
98 | struct lttng_kernel_type_array { | |
99 | struct lttng_kernel_type_common parent; | |
100 | const struct lttng_kernel_type_common *elem_type; | |
101 | unsigned int length; /* Num. elems. */ | |
102 | unsigned int alignment; | |
103 | enum lttng_kernel_string_encoding encoding; | |
104 | }; | |
105 | ||
106 | struct lttng_kernel_type_sequence { | |
107 | struct lttng_kernel_type_common parent; | |
f0039724 | 108 | const char *length_name; /* Length field name. If NULL, use previous field. */ |
437d5aa5 MD |
109 | const struct lttng_kernel_type_common *elem_type; |
110 | unsigned int alignment; /* Alignment before elements. */ | |
111 | enum lttng_kernel_string_encoding encoding; | |
112 | }; | |
113 | ||
114 | struct lttng_kernel_type_struct { | |
115 | struct lttng_kernel_type_common parent; | |
116 | unsigned int nr_fields; | |
117 | const struct lttng_kernel_event_field **fields; /* Array of pointers to fields. */ | |
118 | unsigned int alignment; | |
119 | }; | |
120 | ||
121 | struct lttng_kernel_type_variant { | |
122 | struct lttng_kernel_type_common parent; | |
f0039724 | 123 | const char *tag_name; /* Tag field name. If NULL, use previous field. */ |
437d5aa5 MD |
124 | const struct lttng_kernel_event_field **choices; /* Array of pointers to fields. */ |
125 | unsigned int nr_choices; | |
126 | unsigned int alignment; | |
c099397a MD |
127 | }; |
128 | ||
d96a4a7a | 129 | struct lttng_kernel_enum_desc { |
c099397a | 130 | const char *name; |
437d5aa5 | 131 | const struct lttng_kernel_enum_entry **entries; |
141ddf28 | 132 | unsigned int nr_entries; |
c099397a | 133 | }; |
c0edae1d MD |
134 | |
135 | /* Event field description */ | |
136 | ||
437d5aa5 | 137 | struct lttng_kernel_event_field { |
c0edae1d | 138 | const char *name; |
437d5aa5 | 139 | const struct lttng_kernel_type_common *type; |
f127e61e | 140 | unsigned int nowrite:1, /* do not write into trace */ |
ceabb767 MD |
141 | user:1, /* fetch from user-space */ |
142 | nofilter:1; /* do not consider for filter */ | |
c0edae1d MD |
143 | }; |
144 | ||
16e1064f FD |
145 | #ifndef PARAMS |
146 | #define PARAMS(args...) args | |
147 | #endif | |
148 | ||
437d5aa5 MD |
149 | #define lttng_kernel_static_type_integer(_size, _alignment, _signedness, _byte_order, _base) \ |
150 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_integer, { \ | |
151 | .parent = { \ | |
152 | .type = lttng_kernel_type_integer, \ | |
153 | }, \ | |
154 | .size = (_size), \ | |
155 | .alignment = (_alignment), \ | |
156 | .signedness = (_signedness), \ | |
157 | .reverse_byte_order = (_byte_order) != __BYTE_ORDER, \ | |
158 | .base = (_base), \ | |
159 | })) | |
160 | ||
161 | #define lttng_kernel_static_type_integer_from_type(_type, _byte_order, _base) \ | |
162 | lttng_kernel_static_type_integer(sizeof(_type) * CHAR_BIT, \ | |
163 | lttng_alignof(_type) * CHAR_BIT, \ | |
164 | lttng_is_signed_type(_type), \ | |
165 | _byte_order, \ | |
166 | _base) | |
167 | ||
168 | #define lttng_kernel_static_type_enum(_desc, _container_type) \ | |
169 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_enum, { \ | |
170 | .parent = { \ | |
171 | .type = lttng_kernel_type_enum, \ | |
172 | }, \ | |
173 | .desc = (_desc), \ | |
174 | .container_type = (_container_type), \ | |
175 | })) | |
176 | ||
177 | #define lttng_kernel_static_type_array(_length, _elem_type, _alignment, _encoding) \ | |
178 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_array, { \ | |
179 | .parent = { \ | |
180 | .type = lttng_kernel_type_array, \ | |
181 | }, \ | |
182 | .length = (_length), \ | |
183 | .alignment = (_alignment), \ | |
184 | .encoding = lttng_kernel_string_encoding_##_encoding, \ | |
185 | .elem_type = (_elem_type), \ | |
186 | })) | |
187 | ||
188 | #define lttng_kernel_static_type_array_text(_length) \ | |
189 | lttng_kernel_static_type_array(_length, \ | |
190 | lttng_kernel_static_type_integer(sizeof(char) * CHAR_BIT, \ | |
191 | lttng_alignof(char) * CHAR_BIT, lttng_is_signed_type(char), \ | |
192 | __BYTE_ORDER, 10), \ | |
193 | 0, UTF8) | |
194 | ||
195 | #define lttng_kernel_static_type_sequence(_length_name, _elem_type, _alignment, _encoding) \ | |
196 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_sequence, { \ | |
197 | .parent = { \ | |
198 | .type = lttng_kernel_type_sequence, \ | |
199 | }, \ | |
200 | .length_name = (_length_name), \ | |
201 | .alignment = (_alignment), \ | |
202 | .encoding = lttng_kernel_string_encoding_##_encoding, \ | |
203 | .elem_type = (_elem_type), \ | |
204 | })) | |
205 | ||
206 | #define lttng_kernel_static_type_string(_encoding) \ | |
207 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_string, { \ | |
208 | .parent = { \ | |
209 | .type = lttng_kernel_type_string, \ | |
210 | }, \ | |
211 | .encoding = lttng_kernel_string_encoding_##_encoding, \ | |
212 | })) | |
213 | ||
16e1064f FD |
214 | #define lttng_kernel_static_type_struct_init(_nr_fields, _fields, _alignment) \ |
215 | { \ | |
437d5aa5 MD |
216 | .parent = { \ |
217 | .type = lttng_kernel_type_struct, \ | |
218 | }, \ | |
219 | .nr_fields = (_nr_fields), \ | |
220 | .fields = _fields, \ | |
221 | .alignment = (_alignment), \ | |
16e1064f FD |
222 | } |
223 | ||
224 | #define lttng_kernel_static_type_struct(_nr_fields, _fields, _alignment) \ | |
225 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_struct, \ | |
226 | lttng_kernel_static_type_struct_init(_nr_fields, PARAMS(_fields), _alignment) \ | |
227 | )) | |
437d5aa5 MD |
228 | |
229 | #define lttng_kernel_static_type_variant(_nr_choices, _choices, _tag_name, _alignment) \ | |
230 | ((const struct lttng_kernel_type_common *) __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_type_variant, { \ | |
231 | .parent = { \ | |
232 | .type = lttng_kernel_type_variant, \ | |
233 | }, \ | |
234 | .tag_name = (_tag_name), \ | |
235 | .choices = _choices, \ | |
236 | .nr_choices = (_nr_choices), \ | |
237 | .alignment = (_alignment), \ | |
238 | })) | |
239 | ||
240 | #define lttng_kernel_static_event_field(_name, _type, _nowrite, _user, _nofilter) \ | |
241 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_event_field, { \ | |
242 | .name = (_name), \ | |
243 | .type = (_type), \ | |
244 | .nowrite = (_nowrite), \ | |
245 | .user = (_user), \ | |
246 | .nofilter = (_nofilter), \ | |
247 | }) | |
248 | ||
249 | #define lttng_kernel_static_event_field_array(_fields...) \ | |
250 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_event_field *, \ | |
251 | _fields \ | |
252 | ) | |
253 | ||
437d5aa5 MD |
254 | #define lttng_kernel_static_enum_entry_value(_string, _value) \ |
255 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \ | |
256 | .start = { \ | |
257 | .signedness = lttng_is_signed_type(__typeof__(_value)), \ | |
258 | .value = lttng_is_signed_type(__typeof__(_value)) ? \ | |
259 | (long long) (_value) : (_value), \ | |
260 | }, \ | |
261 | .end = { \ | |
262 | .signedness = lttng_is_signed_type(__typeof__(_value)), \ | |
263 | .value = lttng_is_signed_type(__typeof__(_value)) ? \ | |
264 | (long long) (_value) : (_value), \ | |
265 | }, \ | |
266 | .string = (_string), \ | |
267 | }), | |
268 | ||
269 | #define lttng_kernel_static_enum_entry_range(_string, _range_start, _range_end) \ | |
270 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \ | |
271 | .start = { \ | |
272 | .signedness = lttng_is_signed_type(__typeof__(_range_start)), \ | |
273 | .value = lttng_is_signed_type(__typeof__(_range_start)) ? \ | |
274 | (long long) (_range_start) : (_range_start), \ | |
275 | }, \ | |
276 | .end = { \ | |
277 | .signedness = lttng_is_signed_type(__typeof__(_range_end)), \ | |
278 | .value = lttng_is_signed_type(__typeof__(_range_end)) ? \ | |
279 | (long long) (_range_end) : (_range_end), \ | |
280 | }, \ | |
281 | .string = (_string), \ | |
282 | }), | |
283 | ||
284 | #define lttng_kernel_static_enum_entry_auto(_string) \ | |
285 | __LTTNG_COMPOUND_LITERAL(const struct lttng_kernel_enum_entry, { \ | |
286 | .start = { \ | |
287 | .signedness = -1, \ | |
288 | .value = -1, \ | |
289 | }, \ | |
290 | .end = { \ | |
291 | .signedness = -1, \ | |
292 | .value = -1, \ | |
293 | }, \ | |
294 | .string = (_string), \ | |
295 | .options = { \ | |
296 | .is_auto = 1, \ | |
297 | } \ | |
298 | }), | |
299 | ||
346cb5ee | 300 | struct lttng_kernel_probe_ctx { |
e2d5dbc7 | 301 | struct lttng_kernel_event_common *event; |
79150a49 JD |
302 | uint8_t interruptible; |
303 | }; | |
304 | ||
437d5aa5 MD |
305 | struct lttng_kernel_event_desc { |
306 | const char *event_name; /* lttng-modules name */ | |
307 | const char *event_kname; /* Linux kernel name (tracepoints) */ | |
308 | const struct lttng_kernel_probe_desc *probe_desc; | |
309 | void (*probe_callback)(void); | |
310 | const struct lttng_kernel_event_field **fields; /* event payload */ | |
c0edae1d | 311 | unsigned int nr_fields; |
dc7f600a | 312 | struct module *owner; |
c0edae1d MD |
313 | }; |
314 | ||
437d5aa5 MD |
315 | struct lttng_kernel_probe_desc { |
316 | const char *provider_name; | |
317 | const struct lttng_kernel_event_desc **event_desc; | |
85a9ca7f MD |
318 | unsigned int nr_events; |
319 | struct list_head head; /* chain registered probes */ | |
3c997079 MD |
320 | struct list_head lazy_init_head; |
321 | int lazy; /* lazy registration */ | |
85a9ca7f MD |
322 | }; |
323 | ||
8a445457 MD |
324 | /* |
325 | * Result of the run_filter() callback. | |
326 | */ | |
327 | enum lttng_kernel_event_filter_result { | |
328 | LTTNG_KERNEL_EVENT_FILTER_ACCEPT = 0, | |
329 | LTTNG_KERNEL_EVENT_FILTER_REJECT = 1, | |
330 | }; | |
331 | ||
a67ba386 MD |
332 | struct lttng_kernel_event_common_private; |
333 | ||
334 | enum lttng_kernel_event_type { | |
335 | LTTNG_KERNEL_EVENT_TYPE_RECORDER = 0, | |
336 | LTTNG_KERNEL_EVENT_TYPE_NOTIFIER = 1, | |
337 | }; | |
338 | ||
339 | struct lttng_kernel_event_common { | |
340 | struct lttng_kernel_event_common_private *priv; /* Private event interface */ | |
341 | ||
342 | enum lttng_kernel_event_type type; | |
343 | /* Get child with container_of(). */ | |
344 | ||
e64957da | 345 | int enabled; |
a67ba386 | 346 | int eval_filter; /* Need to evaluate filters */ |
8a445457 | 347 | int (*run_filter)(const struct lttng_kernel_event_common *event, |
a67ba386 | 348 | const char *stack_data, |
346cb5ee | 349 | struct lttng_kernel_probe_ctx *probe_ctx, |
a67ba386 | 350 | void *filter_ctx); |
3c997079 MD |
351 | }; |
352 | ||
a67ba386 MD |
353 | struct lttng_kernel_event_recorder_private; |
354 | ||
355 | struct lttng_kernel_event_recorder { | |
356 | struct lttng_kernel_event_common parent; | |
357 | struct lttng_kernel_event_recorder_private *priv; /* Private event record interface */ | |
358 | ||
359 | struct lttng_channel *chan; | |
c3eddb2e MD |
360 | }; |
361 | ||
a67ba386 MD |
362 | struct lttng_kernel_notification_ctx { |
363 | int eval_capture; /* Capture evaluation available. */ | |
364 | }; | |
dffef45d | 365 | |
a67ba386 | 366 | struct lttng_kernel_event_notifier_private; |
8a8ac9a8 | 367 | |
a67ba386 MD |
368 | struct lttng_kernel_event_notifier { |
369 | struct lttng_kernel_event_common parent; | |
370 | struct lttng_kernel_event_notifier_private *priv; /* Private event notifier interface */ | |
dffef45d | 371 | |
a67ba386 MD |
372 | int eval_capture; /* Need to evaluate capture */ |
373 | void (*notification_send)(struct lttng_kernel_event_notifier *event_notifier, | |
a67ba386 | 374 | const char *stack_data, |
346cb5ee | 375 | struct lttng_kernel_probe_ctx *probe_ctx, |
a67ba386 | 376 | struct lttng_kernel_notification_ctx *notif_ctx); |
dffef45d FD |
377 | }; |
378 | ||
da1fe18f MD |
379 | struct lttng_kernel_channel_buffer_ops { |
380 | struct lttng_kernel_channel_buffer_ops_private *priv; /* Private channel buffer ops interface. */ | |
381 | ||
e27e4381 MD |
382 | int (*event_reserve)(struct lttng_kernel_ring_buffer_ctx *ctx); |
383 | void (*event_commit)(struct lttng_kernel_ring_buffer_ctx *ctx); | |
384 | void (*event_write)(struct lttng_kernel_ring_buffer_ctx *ctx, const void *src, | |
85a9ca7f | 385 | size_t len); |
e27e4381 | 386 | void (*event_write_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx, |
4ea00e4f | 387 | const void *src, size_t len); |
e27e4381 | 388 | void (*event_memset)(struct lttng_kernel_ring_buffer_ctx *ctx, |
58aa5d24 | 389 | int c, size_t len); |
e27e4381 | 390 | void (*event_strcpy)(struct lttng_kernel_ring_buffer_ctx *ctx, const char *src, |
16f78f3a | 391 | size_t len); |
e27e4381 | 392 | void (*event_strcpy_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx, |
16f78f3a | 393 | const char __user *src, size_t len); |
85a9ca7f MD |
394 | }; |
395 | ||
a90917c3 | 396 | struct lttng_channel { |
c099397a | 397 | unsigned int id; |
85a9ca7f | 398 | struct channel *chan; /* Channel buffers */ |
e64957da | 399 | int enabled; |
437d5aa5 | 400 | struct lttng_kernel_ctx *ctx; |
85a9ca7f | 401 | /* Event ID management */ |
a40e3229 | 402 | struct lttng_kernel_session *session; |
85a9ca7f MD |
403 | struct file *file; /* File associated to channel */ |
404 | unsigned int free_event_id; /* Next event ID to allocate */ | |
405 | struct list_head list; /* Channel list */ | |
da1fe18f | 406 | struct lttng_kernel_channel_buffer_ops *ops; |
a90917c3 | 407 | struct lttng_transport *transport; |
3b82c4e1 MD |
408 | struct hlist_head *sc_table; /* for syscall tracing */ |
409 | struct hlist_head *compat_sc_table; | |
410 | struct hlist_head *sc_exit_table; /* for syscall exit tracing */ | |
411 | struct hlist_head *compat_sc_exit_table; | |
412 | struct hlist_head sc_unknown; /* for unknown syscalls */ | |
413 | struct hlist_head sc_compat_unknown; | |
414 | struct hlist_head sc_exit_unknown; | |
415 | struct hlist_head compat_sc_exit_unknown; | |
80f87dd2 | 416 | struct lttng_syscall_filter *sc_filter; |
9115fbdc | 417 | int header_type; /* 0: unset, 1: compact, 2: large */ |
d83004aa | 418 | enum channel_type channel_type; |
3b82c4e1 MD |
419 | int syscall_all_entry; |
420 | int syscall_all_exit; | |
80f87dd2 MD |
421 | unsigned int metadata_dumped:1, |
422 | sys_enter_registered:1, | |
423 | sys_exit_registered:1, | |
3c997079 | 424 | tstate:1; /* Transient enable state */ |
85a9ca7f MD |
425 | }; |
426 | ||
114667d5 MD |
427 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
428 | ||
429 | struct lttng_dynamic_len_stack { | |
430 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; | |
431 | size_t offset; | |
432 | }; | |
433 | ||
434 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); | |
e0130fab MD |
435 | |
436 | /* | |
a2fa977a | 437 | * struct lttng_kernel_id_tracker declared in header due to deferencing of *v |
e0130fab MD |
438 | * in RCU_INITIALIZER(v). |
439 | */ | |
d1f652f8 MD |
440 | #define LTTNG_ID_HASH_BITS 6 |
441 | #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS) | |
e0130fab | 442 | |
a2fa977a | 443 | struct lttng_kernel_id_tracker_rcu { |
d1f652f8 MD |
444 | struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE]; |
445 | }; | |
446 | ||
a2fa977a MD |
447 | struct lttng_kernel_id_tracker { |
448 | struct lttng_kernel_id_tracker_private *priv; /* Private API */ | |
449 | ||
450 | struct lttng_kernel_id_tracker_rcu *p; /* RCU dereferenced. */ | |
e0130fab MD |
451 | }; |
452 | ||
a40e3229 MD |
453 | struct lttng_kernel_session_private; |
454 | ||
455 | struct lttng_kernel_session { | |
456 | struct lttng_kernel_session_private *priv; /* Private session interface */ | |
457 | ||
85a9ca7f | 458 | int active; /* Is trace session active ? */ |
a40e3229 | 459 | |
a2fa977a MD |
460 | struct lttng_kernel_id_tracker pid_tracker; |
461 | struct lttng_kernel_id_tracker vpid_tracker; | |
462 | struct lttng_kernel_id_tracker uid_tracker; | |
463 | struct lttng_kernel_id_tracker vuid_tracker; | |
464 | struct lttng_kernel_id_tracker gid_tracker; | |
465 | struct lttng_kernel_id_tracker vgid_tracker; | |
85a9ca7f MD |
466 | }; |
467 | ||
c93ed3b0 MD |
468 | int lttng_kernel_probe_register(struct lttng_kernel_probe_desc *desc); |
469 | void lttng_kernel_probe_unregister(struct lttng_kernel_probe_desc *desc); | |
d83004aa | 470 | |
a2fa977a | 471 | bool lttng_id_tracker_lookup(struct lttng_kernel_id_tracker_rcu *p, int id); |
271b6681 | 472 | |
a90917c3 | 473 | #endif /* _LTTNG_EVENTS_H */ |