Commit | Line | Data |
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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 | ||
21f58fb7 | 13 | #include <linux/irq_work.h> |
3a523f5b | 14 | #include <linux/version.h> |
4e3c1b9b | 15 | #include <linux/list.h> |
d6d808f3 | 16 | #include <linux/kprobes.h> |
d83004aa | 17 | #include <linux/kref.h> |
41f229dc | 18 | #include <linux/uuid.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 | |
06254b0f | 26 | #define lttng_is_signed_type(type) (((type)(-1)) < 0) |
9e7e4892 | 27 | |
a90917c3 MD |
28 | struct lttng_channel; |
29 | struct lttng_session; | |
d83004aa | 30 | struct lttng_metadata_cache; |
1c25284c | 31 | struct lib_ring_buffer_ctx; |
ba1f5986 | 32 | struct perf_event; |
833ad6a0 | 33 | struct perf_event_attr; |
3b731ab1 | 34 | struct lib_ring_buffer_config; |
4e3c1b9b | 35 | |
c0edae1d MD |
36 | /* Type description */ |
37 | ||
c0edae1d MD |
38 | enum abstract_types { |
39 | atype_integer, | |
c0edae1d | 40 | atype_string, |
ceabb767 MD |
41 | atype_enum_nestable, |
42 | atype_array_nestable, | |
43 | atype_sequence_nestable, | |
44 | atype_struct_nestable, | |
45 | atype_variant_nestable, | |
c0edae1d MD |
46 | NR_ABSTRACT_TYPES, |
47 | }; | |
48 | ||
c0edae1d | 49 | enum lttng_string_encodings { |
e0a7a7c4 MD |
50 | lttng_encode_none = 0, |
51 | lttng_encode_UTF8 = 1, | |
52 | lttng_encode_ASCII = 2, | |
c0edae1d MD |
53 | NR_STRING_ENCODINGS, |
54 | }; | |
55 | ||
d83004aa JD |
56 | enum channel_type { |
57 | PER_CPU_CHANNEL, | |
58 | METADATA_CHANNEL, | |
59 | }; | |
60 | ||
141ddf28 MD |
61 | struct lttng_enum_value { |
62 | unsigned long long value; | |
63 | unsigned int signedness:1; | |
64 | }; | |
65 | ||
c0edae1d | 66 | struct lttng_enum_entry { |
141ddf28 | 67 | struct lttng_enum_value start, end; /* start and end are inclusive */ |
c0edae1d | 68 | const char *string; |
08ad1061 PP |
69 | struct { |
70 | unsigned int is_auto:1; | |
71 | } options; | |
c0edae1d MD |
72 | }; |
73 | ||
43803cf2 MD |
74 | #define __type_integer(_type, _size, _alignment, _signedness, \ |
75 | _byte_order, _base, _encoding) \ | |
c099397a MD |
76 | { \ |
77 | .atype = atype_integer, \ | |
ceabb767 | 78 | .u.integer = \ |
c099397a | 79 | { \ |
43803cf2 MD |
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, \ | |
e0a7a7c4 | 84 | .base = _base, \ |
64c796d8 | 85 | .encoding = lttng_encode_##_encoding, \ |
c099397a MD |
86 | }, \ |
87 | } \ | |
88 | ||
89 | struct lttng_integer_type { | |
90 | unsigned int size; /* in bits */ | |
91 | unsigned short alignment; /* in bits */ | |
9cccf98a MD |
92 | unsigned int signedness:1, |
93 | reverse_byte_order:1; | |
e0a7a7c4 MD |
94 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ |
95 | enum lttng_string_encodings encoding; | |
c099397a MD |
96 | }; |
97 | ||
c0edae1d MD |
98 | struct lttng_type { |
99 | enum abstract_types atype; | |
c0edae1d | 100 | union { |
ceabb767 | 101 | struct lttng_integer_type integer; |
c0edae1d | 102 | struct { |
ceabb767 MD |
103 | enum lttng_string_encodings encoding; |
104 | } string; | |
c0edae1d | 105 | struct { |
ceabb767 MD |
106 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ |
107 | const struct lttng_type *container_type; | |
108 | } enum_nestable; | |
f513b2bf | 109 | struct { |
ceabb767 MD |
110 | const struct lttng_type *elem_type; |
111 | unsigned int length; /* Num. elems. */ | |
112 | unsigned int alignment; | |
113 | } array_nestable; | |
f513b2bf | 114 | struct { |
ceabb767 MD |
115 | const char *length_name; /* Length field name. */ |
116 | const struct lttng_type *elem_type; | |
117 | unsigned int alignment; /* Alignment before elements. */ | |
118 | } sequence_nestable; | |
f513b2bf | 119 | struct { |
ceabb767 MD |
120 | unsigned int nr_fields; |
121 | const struct lttng_event_field *fields; /* Array of fields. */ | |
122 | unsigned int alignment; | |
123 | } struct_nestable; | |
65c85aa6 MD |
124 | struct { |
125 | const char *tag_name; | |
ceabb767 MD |
126 | const struct lttng_event_field *choices; /* Array of fields. */ |
127 | unsigned int nr_choices; | |
128 | unsigned int alignment; | |
129 | } variant_nestable; | |
c0edae1d | 130 | } u; |
c099397a MD |
131 | }; |
132 | ||
141ddf28 | 133 | struct lttng_enum_desc { |
c099397a | 134 | const char *name; |
c099397a | 135 | const struct lttng_enum_entry *entries; |
141ddf28 | 136 | unsigned int nr_entries; |
c099397a | 137 | }; |
c0edae1d MD |
138 | |
139 | /* Event field description */ | |
140 | ||
141 | struct lttng_event_field { | |
142 | const char *name; | |
f17701fb | 143 | struct lttng_type type; |
f127e61e | 144 | unsigned int nowrite:1, /* do not write into trace */ |
ceabb767 MD |
145 | user:1, /* fetch from user-space */ |
146 | nofilter:1; /* do not consider for filter */ | |
c0edae1d MD |
147 | }; |
148 | ||
07dfc1d0 MD |
149 | union lttng_ctx_value { |
150 | int64_t s64; | |
151 | const char *str; | |
152 | double d; | |
153 | }; | |
154 | ||
2001023e MD |
155 | /* |
156 | * We need to keep this perf counter field separately from struct | |
157 | * lttng_ctx_field because cpu hotplug needs fixed-location addresses. | |
158 | */ | |
159 | struct lttng_perf_counter_field { | |
1e367326 MD |
160 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) |
161 | struct lttng_cpuhp_node cpuhp_prepare; | |
162 | struct lttng_cpuhp_node cpuhp_online; | |
163 | #else | |
2001023e MD |
164 | struct notifier_block nb; |
165 | int hp_enable; | |
1e367326 | 166 | #endif |
2001023e MD |
167 | struct perf_event_attr *attr; |
168 | struct perf_event **e; /* per-cpu array */ | |
169 | }; | |
170 | ||
79150a49 JD |
171 | struct lttng_probe_ctx { |
172 | struct lttng_event *event; | |
173 | uint8_t interruptible; | |
174 | }; | |
175 | ||
ba1f5986 | 176 | struct lttng_ctx_field { |
8070f5c0 | 177 | struct lttng_event_field event_field; |
f1676205 | 178 | size_t (*get_size)(size_t offset); |
1474c8e2 FG |
179 | size_t (*get_size_arg)(size_t offset, struct lttng_ctx_field *field, |
180 | struct lib_ring_buffer_ctx *ctx, | |
181 | struct lttng_channel *chan); | |
f1676205 MD |
182 | void (*record)(struct lttng_ctx_field *field, |
183 | struct lib_ring_buffer_ctx *ctx, | |
a90917c3 | 184 | struct lttng_channel *chan); |
07dfc1d0 | 185 | void (*get_value)(struct lttng_ctx_field *field, |
79150a49 | 186 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 | 187 | union lttng_ctx_value *value); |
ba1f5986 | 188 | union { |
2001023e | 189 | struct lttng_perf_counter_field *perf_counter; |
ba1f5986 | 190 | } u; |
2dccf128 | 191 | void (*destroy)(struct lttng_ctx_field *field); |
3c1a57e8 MD |
192 | /* |
193 | * Private data to keep state between get_size and record. | |
194 | * User must perform its own synchronization to protect against | |
195 | * concurrent and reentrant contexts. | |
196 | */ | |
197 | void *priv; | |
ba1f5986 MD |
198 | }; |
199 | ||
200 | struct lttng_ctx { | |
833ad6a0 | 201 | struct lttng_ctx_field *fields; |
0d1a681e | 202 | unsigned int nr_fields; |
ba1f5986 | 203 | unsigned int allocated_fields; |
a9dd15da | 204 | size_t largest_align; /* in bytes */ |
0d1a681e MD |
205 | }; |
206 | ||
207 | struct lttng_event_desc { | |
a26a7e4f MD |
208 | const char *name; /* lttng-modules name */ |
209 | const char *kname; /* Linux kernel name (tracepoints) */ | |
c0edae1d | 210 | void *probe_callback; |
0d1a681e MD |
211 | const struct lttng_event_ctx *ctx; /* context */ |
212 | const struct lttng_event_field *fields; /* event payload */ | |
c0edae1d | 213 | unsigned int nr_fields; |
dc7f600a | 214 | struct module *owner; |
c0edae1d MD |
215 | }; |
216 | ||
85a9ca7f | 217 | struct lttng_probe_desc { |
3c997079 | 218 | const char *provider; |
f7bdf4db | 219 | const struct lttng_event_desc **event_desc; |
85a9ca7f MD |
220 | unsigned int nr_events; |
221 | struct list_head head; /* chain registered probes */ | |
3c997079 MD |
222 | struct list_head lazy_init_head; |
223 | int lazy; /* lazy registration */ | |
85a9ca7f MD |
224 | }; |
225 | ||
7371f44c MD |
226 | struct lttng_krp; /* Kretprobe handling */ |
227 | ||
3c997079 MD |
228 | enum lttng_event_type { |
229 | LTTNG_TYPE_EVENT = 0, | |
230 | LTTNG_TYPE_ENABLER = 1, | |
231 | }; | |
232 | ||
07dfc1d0 MD |
233 | struct lttng_filter_bytecode_node { |
234 | struct list_head node; | |
235 | struct lttng_enabler *enabler; | |
236 | /* | |
237 | * struct lttng_kernel_filter_bytecode has var. sized array, must be | |
238 | * last field. | |
239 | */ | |
240 | struct lttng_kernel_filter_bytecode bc; | |
241 | }; | |
242 | ||
243 | /* | |
244 | * Filter return value masks. | |
245 | */ | |
246 | enum lttng_filter_ret { | |
247 | LTTNG_FILTER_DISCARD = 0, | |
248 | LTTNG_FILTER_RECORD_FLAG = (1ULL << 0), | |
249 | /* Other bits are kept for future use. */ | |
250 | }; | |
251 | ||
252 | struct lttng_bytecode_runtime { | |
253 | /* Associated bytecode */ | |
254 | struct lttng_filter_bytecode_node *bc; | |
79150a49 JD |
255 | uint64_t (*filter)(void *filter_data, struct lttng_probe_ctx *lttng_probe_ctx, |
256 | const char *filter_stack_data); | |
07dfc1d0 MD |
257 | int link_failed; |
258 | struct list_head node; /* list of bytecode runtime in event */ | |
2dfda770 | 259 | struct lttng_ctx *ctx; |
07dfc1d0 MD |
260 | }; |
261 | ||
3c997079 MD |
262 | /* |
263 | * Objects in a linked-list of enablers, owned by an event. | |
264 | */ | |
265 | struct lttng_enabler_ref { | |
266 | struct list_head node; /* enabler ref list */ | |
267 | struct lttng_enabler *ref; /* backward ref */ | |
268 | }; | |
269 | ||
3aed4dca FD |
270 | struct lttng_uprobe_handler { |
271 | struct lttng_event *event; | |
272 | loff_t offset; | |
273 | struct uprobe_consumer up_consumer; | |
274 | struct list_head node; | |
275 | }; | |
276 | ||
badfe9f5 MD |
277 | enum lttng_syscall_entryexit { |
278 | LTTNG_SYSCALL_ENTRY, | |
279 | LTTNG_SYSCALL_EXIT, | |
280 | }; | |
281 | ||
282 | enum lttng_syscall_abi { | |
283 | LTTNG_SYSCALL_ABI_NATIVE, | |
284 | LTTNG_SYSCALL_ABI_COMPAT, | |
285 | }; | |
286 | ||
85a9ca7f | 287 | /* |
a90917c3 | 288 | * lttng_event structure is referred to by the tracing fast path. It must be |
85a9ca7f MD |
289 | * kept small. |
290 | */ | |
a90917c3 | 291 | struct lttng_event { |
3c997079 | 292 | enum lttng_event_type evtype; /* First field. */ |
85a9ca7f | 293 | unsigned int id; |
a90917c3 | 294 | struct lttng_channel *chan; |
e64957da | 295 | int enabled; |
d3dbe23c | 296 | const struct lttng_event_desc *desc; |
85a9ca7f | 297 | void *filter; |
f1676205 | 298 | struct lttng_ctx *ctx; |
38d024ae | 299 | enum lttng_kernel_instrumentation instrumentation; |
d6d808f3 MD |
300 | union { |
301 | struct { | |
302 | struct kprobe kp; | |
303 | char *symbol_name; | |
304 | } kprobe; | |
7371f44c MD |
305 | struct { |
306 | struct lttng_krp *lttng_krp; | |
307 | char *symbol_name; | |
308 | } kretprobe; | |
149b9a9d | 309 | struct { |
149b9a9d | 310 | struct inode *inode; |
3aed4dca | 311 | struct list_head head; |
149b9a9d | 312 | } uprobe; |
badfe9f5 MD |
313 | struct { |
314 | char *syscall_name; | |
315 | enum lttng_syscall_entryexit entryexit; | |
316 | enum lttng_syscall_abi abi; | |
317 | } syscall; | |
d6d808f3 | 318 | } u; |
3c997079 | 319 | struct list_head list; /* Event list in session */ |
9cccf98a | 320 | unsigned int metadata_dumped:1; |
3c997079 MD |
321 | |
322 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
323 | struct list_head enablers_ref_head; | |
324 | struct hlist_node hlist; /* session ht of events */ | |
325 | int registered; /* has reg'd tracepoint probe */ | |
07dfc1d0 MD |
326 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
327 | struct list_head bytecode_runtime_head; | |
328 | int has_enablers_without_bytecode; | |
3c997079 MD |
329 | }; |
330 | ||
dffef45d FD |
331 | // FIXME: Really similar to lttng_event above. Could those be merged ? |
332 | struct lttng_event_notifier { | |
333 | enum lttng_event_type evtype; /* First field. */ | |
334 | uint64_t user_token; | |
335 | int enabled; | |
336 | int registered; /* has reg'd tracepoint probe */ | |
337 | const struct lttng_event_desc *desc; | |
338 | void *filter; | |
339 | struct list_head list; /* event_notifier list in event_notifier group */ | |
340 | ||
341 | enum lttng_kernel_instrumentation instrumentation; | |
342 | union { | |
343 | } u; | |
344 | ||
345 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
346 | struct list_head enablers_ref_head; | |
347 | struct hlist_node hlist; /* session ht of event_notifiers */ | |
348 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ | |
349 | struct list_head bytecode_runtime_head; | |
350 | int has_enablers_without_bytecode; | |
351 | ||
21f58fb7 | 352 | void (*send_notification)(struct lttng_event_notifier *event_notifier); |
dffef45d FD |
353 | struct lttng_event_notifier_group *group; /* Weak ref */ |
354 | }; | |
355 | ||
3b861b22 FD |
356 | enum lttng_enabler_format_type { |
357 | LTTNG_ENABLER_FORMAT_STAR_GLOB, | |
358 | LTTNG_ENABLER_FORMAT_NAME, | |
3c997079 MD |
359 | }; |
360 | ||
361 | /* | |
362 | * Enabler field, within whatever object is enabling an event. Target of | |
363 | * backward reference. | |
364 | */ | |
365 | struct lttng_enabler { | |
366 | enum lttng_event_type evtype; /* First field. */ | |
367 | ||
3b861b22 | 368 | enum lttng_enabler_format_type format_type; |
3c997079 | 369 | |
07dfc1d0 MD |
370 | /* head list of struct lttng_ust_filter_bytecode_node */ |
371 | struct list_head filter_bytecode_head; | |
3c997079 MD |
372 | |
373 | struct lttng_kernel_event event_param; | |
b2bc0bc8 | 374 | unsigned int enabled:1; |
dffef45d FD |
375 | |
376 | uint64_t user_token; /* User-provided token. */ | |
b2bc0bc8 FD |
377 | }; |
378 | ||
379 | struct lttng_event_enabler { | |
380 | struct lttng_enabler base; | |
381 | struct list_head node; /* per-session list of enablers */ | |
3c997079 | 382 | struct lttng_channel *chan; |
2954b37c FD |
383 | /* |
384 | * Unused, but kept around to make it explicit that the tracer can do | |
385 | * it. | |
386 | */ | |
3c997079 | 387 | struct lttng_ctx *ctx; |
85a9ca7f MD |
388 | }; |
389 | ||
dffef45d FD |
390 | struct lttng_event_notifier_enabler { |
391 | struct lttng_enabler base; | |
392 | struct list_head node; /* List of event_notifier enablers */ | |
393 | struct lttng_event_notifier_group *group; | |
394 | }; | |
395 | ||
b2bc0bc8 FD |
396 | static inline |
397 | struct lttng_enabler *lttng_event_enabler_as_enabler( | |
398 | struct lttng_event_enabler *event_enabler) | |
399 | { | |
400 | return &event_enabler->base; | |
401 | } | |
402 | ||
dffef45d FD |
403 | static inline |
404 | struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( | |
405 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
406 | { | |
407 | return &event_notifier_enabler->base; | |
408 | } | |
b2bc0bc8 | 409 | |
a90917c3 | 410 | struct lttng_channel_ops { |
85a9ca7f | 411 | struct channel *(*channel_create)(const char *name, |
5cf4b87c | 412 | void *priv, |
85a9ca7f MD |
413 | void *buf_addr, |
414 | size_t subbuf_size, size_t num_subbuf, | |
415 | unsigned int switch_timer_interval, | |
416 | unsigned int read_timer_interval); | |
417 | void (*channel_destroy)(struct channel *chan); | |
418 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); | |
f71ecafa | 419 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
85a9ca7f | 420 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
4e1f08f4 | 421 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
64c796d8 | 422 | uint32_t event_id); |
85a9ca7f MD |
423 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
424 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, | |
425 | size_t len); | |
4ea00e4f JD |
426 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
427 | const void *src, size_t len); | |
58aa5d24 MD |
428 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
429 | int c, size_t len); | |
16f78f3a MD |
430 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
431 | size_t len); | |
432 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, | |
433 | const char __user *src, size_t len); | |
1ec3f75a MD |
434 | /* |
435 | * packet_avail_size returns the available size in the current | |
436 | * packet. Note that the size returned is only a hint, since it | |
437 | * may change due to concurrent writes. | |
438 | */ | |
439 | size_t (*packet_avail_size)(struct channel *chan); | |
71c1d843 | 440 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
24cedcfe MD |
441 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
442 | int (*is_finalized)(struct channel *chan); | |
254ec7bc | 443 | int (*is_disabled)(struct channel *chan); |
3b731ab1 JD |
444 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
445 | struct lib_ring_buffer *bufb, | |
446 | uint64_t *timestamp_begin); | |
447 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, | |
448 | struct lib_ring_buffer *bufb, | |
449 | uint64_t *timestamp_end); | |
450 | int (*events_discarded) (const struct lib_ring_buffer_config *config, | |
451 | struct lib_ring_buffer *bufb, | |
452 | uint64_t *events_discarded); | |
453 | int (*content_size) (const struct lib_ring_buffer_config *config, | |
454 | struct lib_ring_buffer *bufb, | |
455 | uint64_t *content_size); | |
456 | int (*packet_size) (const struct lib_ring_buffer_config *config, | |
457 | struct lib_ring_buffer *bufb, | |
458 | uint64_t *packet_size); | |
459 | int (*stream_id) (const struct lib_ring_buffer_config *config, | |
460 | struct lib_ring_buffer *bufb, | |
461 | uint64_t *stream_id); | |
2348ca17 JD |
462 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
463 | struct lib_ring_buffer *bufb, | |
464 | uint64_t *ts); | |
5b3cf4f9 JD |
465 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
466 | struct lib_ring_buffer *bufb, | |
467 | uint64_t *seq); | |
5594698f JD |
468 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
469 | struct lib_ring_buffer *bufb, | |
470 | uint64_t *id); | |
85a9ca7f MD |
471 | }; |
472 | ||
a90917c3 | 473 | struct lttng_transport { |
a33c9927 MD |
474 | char *name; |
475 | struct module *owner; | |
476 | struct list_head node; | |
a90917c3 | 477 | struct lttng_channel_ops ops; |
a33c9927 MD |
478 | }; |
479 | ||
80f87dd2 MD |
480 | struct lttng_syscall_filter; |
481 | ||
3c997079 MD |
482 | #define LTTNG_EVENT_HT_BITS 12 |
483 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) | |
484 | ||
485 | struct lttng_event_ht { | |
486 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; | |
487 | }; | |
488 | ||
dffef45d FD |
489 | #define LTTNG_EVENT_NOTIFIER_HT_BITS 12 |
490 | #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS) | |
491 | ||
492 | struct lttng_event_notifier_ht { | |
493 | struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE]; | |
494 | }; | |
495 | ||
a90917c3 | 496 | struct lttng_channel { |
c099397a | 497 | unsigned int id; |
85a9ca7f | 498 | struct channel *chan; /* Channel buffers */ |
e64957da | 499 | int enabled; |
f1676205 | 500 | struct lttng_ctx *ctx; |
85a9ca7f | 501 | /* Event ID management */ |
a90917c3 | 502 | struct lttng_session *session; |
85a9ca7f MD |
503 | struct file *file; /* File associated to channel */ |
504 | unsigned int free_event_id; /* Next event ID to allocate */ | |
505 | struct list_head list; /* Channel list */ | |
a90917c3 MD |
506 | struct lttng_channel_ops *ops; |
507 | struct lttng_transport *transport; | |
508 | struct lttng_event **sc_table; /* for syscall tracing */ | |
509 | struct lttng_event **compat_sc_table; | |
5b7ac358 MD |
510 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
511 | struct lttng_event **compat_sc_exit_table; | |
a90917c3 MD |
512 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
513 | struct lttng_event *sc_compat_unknown; | |
5b7ac358 MD |
514 | struct lttng_event *sc_exit_unknown; |
515 | struct lttng_event *compat_sc_exit_unknown; | |
80f87dd2 | 516 | struct lttng_syscall_filter *sc_filter; |
9115fbdc | 517 | int header_type; /* 0: unset, 1: compact, 2: large */ |
d83004aa | 518 | enum channel_type channel_type; |
badfe9f5 | 519 | int syscall_all; |
80f87dd2 MD |
520 | unsigned int metadata_dumped:1, |
521 | sys_enter_registered:1, | |
522 | sys_exit_registered:1, | |
3c997079 | 523 | tstate:1; /* Transient enable state */ |
85a9ca7f MD |
524 | }; |
525 | ||
d83004aa JD |
526 | struct lttng_metadata_stream { |
527 | void *priv; /* Ring buffer private data */ | |
528 | struct lttng_metadata_cache *metadata_cache; | |
f613e3e6 MD |
529 | unsigned int metadata_in; /* Bytes read from the cache */ |
530 | unsigned int metadata_out; /* Bytes consumed from stream */ | |
d83004aa JD |
531 | int finalized; /* Has channel been finalized */ |
532 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ | |
533 | struct list_head list; /* Stream list */ | |
b3b8072b | 534 | struct lttng_transport *transport; |
9616f0bf | 535 | uint64_t version; /* Current version of the metadata cache */ |
8b97fd42 | 536 | bool coherent; /* Stream in a coherent state */ |
d83004aa JD |
537 | }; |
538 | ||
114667d5 MD |
539 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
540 | ||
541 | struct lttng_dynamic_len_stack { | |
542 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; | |
543 | size_t offset; | |
544 | }; | |
545 | ||
546 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); | |
e0130fab MD |
547 | |
548 | /* | |
d1f652f8 | 549 | * struct lttng_id_tracker declared in header due to deferencing of *v |
e0130fab MD |
550 | * in RCU_INITIALIZER(v). |
551 | */ | |
d1f652f8 MD |
552 | #define LTTNG_ID_HASH_BITS 6 |
553 | #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS) | |
e0130fab | 554 | |
d1f652f8 MD |
555 | enum tracker_type { |
556 | TRACKER_PID, | |
557 | TRACKER_VPID, | |
558 | TRACKER_UID, | |
559 | TRACKER_VUID, | |
560 | TRACKER_GID, | |
561 | TRACKER_VGID, | |
562 | ||
563 | TRACKER_UNKNOWN, | |
564 | }; | |
565 | ||
566 | struct lttng_id_tracker_rcu { | |
567 | struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE]; | |
568 | }; | |
569 | ||
570 | struct lttng_id_tracker { | |
571 | struct lttng_session *session; | |
572 | enum tracker_type tracker_type; | |
573 | struct lttng_id_tracker_rcu *p; /* RCU dereferenced. */ | |
e0130fab MD |
574 | }; |
575 | ||
d1f652f8 | 576 | struct lttng_id_hash_node { |
7e6f9ef6 | 577 | struct hlist_node hlist; |
d1f652f8 | 578 | int id; |
7e6f9ef6 MD |
579 | }; |
580 | ||
a90917c3 | 581 | struct lttng_session { |
85a9ca7f | 582 | int active; /* Is trace session active ? */ |
8070f5c0 | 583 | int been_active; /* Has trace session been active ? */ |
85a9ca7f MD |
584 | struct file *file; /* File associated to session */ |
585 | struct list_head chan; /* Channel list head */ | |
586 | struct list_head events; /* Event list head */ | |
587 | struct list_head list; /* Session list */ | |
c099397a | 588 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
d793d5e1 | 589 | uuid_le uuid; /* Trace session unique ID */ |
d83004aa | 590 | struct lttng_metadata_cache *metadata_cache; |
d1f652f8 MD |
591 | struct lttng_id_tracker pid_tracker; |
592 | struct lttng_id_tracker vpid_tracker; | |
593 | struct lttng_id_tracker uid_tracker; | |
594 | struct lttng_id_tracker vuid_tracker; | |
595 | struct lttng_id_tracker gid_tracker; | |
596 | struct lttng_id_tracker vgid_tracker; | |
3c997079 MD |
597 | unsigned int metadata_dumped:1, |
598 | tstate:1; /* Transient enable state */ | |
b2bc0bc8 | 599 | /* List of event enablers */ |
3c997079 MD |
600 | struct list_head enablers_head; |
601 | /* Hash table of events */ | |
602 | struct lttng_event_ht events_ht; | |
7f859fbf | 603 | char name[LTTNG_KERNEL_SESSION_NAME_LEN]; |
1c88f269 | 604 | char creation_time[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN]; |
85a9ca7f MD |
605 | }; |
606 | ||
750b05f2 FD |
607 | struct lttng_event_notifier_group { |
608 | struct file *file; /* File associated to event notifier group */ | |
21f58fb7 | 609 | struct file *notif_file; /* File used to expose notifications to userspace. */ |
750b05f2 | 610 | struct list_head node; /* event notifier group list */ |
dffef45d FD |
611 | struct list_head enablers_head; /* List of enablers */ |
612 | struct list_head event_notifiers_head; /* List of event notifier */ | |
613 | struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */ | |
750b05f2 FD |
614 | struct lttng_ctx *ctx; /* Contexts for filters. */ |
615 | struct lttng_channel_ops *ops; | |
616 | struct lttng_transport *transport; | |
617 | struct channel *chan; /* Ring buffer channel for event notifier group. */ | |
618 | struct lib_ring_buffer *buf; /* Ring buffer for event notifier group. */ | |
21f58fb7 FD |
619 | wait_queue_head_t read_wait; |
620 | struct irq_work wakeup_pending; /* Pending wakeup irq work. */ | |
750b05f2 FD |
621 | }; |
622 | ||
d83004aa JD |
623 | struct lttng_metadata_cache { |
624 | char *data; /* Metadata cache */ | |
625 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ | |
626 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ | |
3e75e2a7 | 627 | atomic_t producing; /* Metadata being produced (incomplete) */ |
d83004aa JD |
628 | struct kref refcount; /* Metadata cache usage */ |
629 | struct list_head metadata_stream; /* Metadata stream list */ | |
a36580d5 | 630 | uuid_le uuid; /* Trace session unique ID (copy) */ |
9616f0bf JD |
631 | struct mutex lock; /* Produce/consume lock */ |
632 | uint64_t version; /* Current version of the metadata */ | |
d83004aa JD |
633 | }; |
634 | ||
3c997079 MD |
635 | void lttng_lock_sessions(void); |
636 | void lttng_unlock_sessions(void); | |
637 | ||
638 | struct list_head *lttng_get_probe_list_head(void); | |
639 | ||
b2bc0bc8 FD |
640 | struct lttng_event_enabler *lttng_event_enabler_create( |
641 | enum lttng_enabler_format_type format_type, | |
3c997079 MD |
642 | struct lttng_kernel_event *event_param, |
643 | struct lttng_channel *chan); | |
644 | ||
b2bc0bc8 FD |
645 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); |
646 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler); | |
dffef45d FD |
647 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
648 | struct lttng_event_notifier_group *event_notifier_group, | |
649 | enum lttng_enabler_format_type format_type, | |
650 | struct lttng_kernel_event_notifier *event_notifier_param); | |
651 | ||
652 | int lttng_event_notifier_enabler_enable( | |
653 | struct lttng_event_notifier_enabler *event_notifier_enabler); | |
654 | int lttng_event_notifier_enabler_disable( | |
655 | struct lttng_event_notifier_enabler *event_notifier_enabler); | |
3c997079 MD |
656 | int lttng_fix_pending_events(void); |
657 | int lttng_session_active(void); | |
658 | ||
a90917c3 MD |
659 | struct lttng_session *lttng_session_create(void); |
660 | int lttng_session_enable(struct lttng_session *session); | |
661 | int lttng_session_disable(struct lttng_session *session); | |
662 | void lttng_session_destroy(struct lttng_session *session); | |
9616f0bf | 663 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
601252cf | 664 | int lttng_session_statedump(struct lttng_session *session); |
d83004aa | 665 | void metadata_cache_destroy(struct kref *kref); |
4e3c1b9b | 666 | |
750b05f2 FD |
667 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void); |
668 | void lttng_event_notifier_group_destroy( | |
669 | struct lttng_event_notifier_group *event_notifier_group); | |
670 | ||
a90917c3 | 671 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
5dbbdb43 MD |
672 | const char *transport_name, |
673 | void *buf_addr, | |
674 | size_t subbuf_size, size_t num_subbuf, | |
675 | unsigned int switch_timer_interval, | |
d83004aa JD |
676 | unsigned int read_timer_interval, |
677 | enum channel_type channel_type); | |
a90917c3 | 678 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
4e3c1b9b MD |
679 | int overwrite, void *buf_addr, |
680 | size_t subbuf_size, size_t num_subbuf, | |
681 | unsigned int switch_timer_interval, | |
682 | unsigned int read_timer_interval); | |
4e3c1b9b | 683 | |
d83004aa | 684 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
a90917c3 | 685 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
3c997079 MD |
686 | struct lttng_kernel_event *event_param, |
687 | void *filter, | |
688 | const struct lttng_event_desc *event_desc, | |
689 | enum lttng_kernel_instrumentation itype); | |
33a39a3c MD |
690 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
691 | struct lttng_kernel_event *event_param, | |
692 | void *filter, | |
693 | const struct lttng_event_desc *event_desc, | |
694 | enum lttng_kernel_instrumentation itype); | |
6dccd6c1 JD |
695 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
696 | struct lttng_kernel_old_event *old_event_param, | |
697 | void *filter, | |
698 | const struct lttng_event_desc *internal_desc); | |
c0e31d2e | 699 | |
dffef45d FD |
700 | struct lttng_event_notifier *lttng_event_notifier_create( |
701 | const struct lttng_event_desc *event_notifier_desc, | |
702 | uint64_t id, | |
703 | struct lttng_event_notifier_group *event_notifier_group, | |
704 | struct lttng_kernel_event_notifier *event_notifier_param, | |
705 | void *filter, | |
706 | enum lttng_kernel_instrumentation itype); | |
707 | struct lttng_event_notifier *_lttng_event_notifier_create( | |
708 | const struct lttng_event_desc *event_notifier_desc, | |
709 | uint64_t id, | |
710 | struct lttng_event_notifier_group *event_notifier_group, | |
711 | struct lttng_kernel_event_notifier *event_notifier_param, | |
712 | void *filter, | |
713 | enum lttng_kernel_instrumentation itype); | |
714 | ||
a90917c3 MD |
715 | int lttng_channel_enable(struct lttng_channel *channel); |
716 | int lttng_channel_disable(struct lttng_channel *channel); | |
717 | int lttng_event_enable(struct lttng_event *event); | |
718 | int lttng_event_disable(struct lttng_event *event); | |
e64957da | 719 | |
a90917c3 MD |
720 | void lttng_transport_register(struct lttng_transport *transport); |
721 | void lttng_transport_unregister(struct lttng_transport *transport); | |
11b5a3c2 | 722 | |
360f38ea | 723 | void synchronize_trace(void); |
80996790 | 724 | int lttng_abi_init(void); |
6dccd6c1 | 725 | int lttng_abi_compat_old_init(void); |
80996790 | 726 | void lttng_abi_exit(void); |
6dccd6c1 | 727 | void lttng_abi_compat_old_exit(void); |
1c25284c | 728 | |
a90917c3 MD |
729 | int lttng_probe_register(struct lttng_probe_desc *desc); |
730 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
0bcedee9 FD |
731 | const struct lttng_event_desc *lttng_event_desc_get(const char *name); |
732 | void lttng_event_desc_put(const struct lttng_event_desc *desc); | |
a90917c3 MD |
733 | int lttng_probes_init(void); |
734 | void lttng_probes_exit(void); | |
1ec65de1 | 735 | |
b3b8072b | 736 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
8b97fd42 | 737 | struct channel *chan, bool *coherent); |
d83004aa | 738 | |
d1f652f8 MD |
739 | int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node); |
740 | int lttng_id_tracker_empty_set(struct lttng_id_tracker *lf); | |
741 | void lttng_id_tracker_destroy(struct lttng_id_tracker *lf, bool rcu); | |
742 | bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id); | |
743 | int lttng_id_tracker_add(struct lttng_id_tracker *lf, int id); | |
744 | int lttng_id_tracker_del(struct lttng_id_tracker *lf, int id); | |
e0130fab | 745 | |
d1f652f8 MD |
746 | int lttng_session_track_id(struct lttng_session *session, |
747 | enum tracker_type tracker_type, int id); | |
748 | int lttng_session_untrack_id(struct lttng_session *session, | |
749 | enum tracker_type tracker_type, int id); | |
e0130fab | 750 | |
d1f652f8 MD |
751 | int lttng_session_list_tracker_ids(struct lttng_session *session, |
752 | enum tracker_type tracker_type); | |
7e6f9ef6 | 753 | |
2754583e MD |
754 | void lttng_clock_ref(void); |
755 | void lttng_clock_unref(void); | |
756 | ||
3a523f5b | 757 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
a90917c3 MD |
758 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter); |
759 | int lttng_syscalls_unregister(struct lttng_channel *chan); | |
badfe9f5 | 760 | int lttng_syscalls_destroy(struct lttng_channel *chan); |
80f87dd2 | 761 | int lttng_syscall_filter_enable(struct lttng_channel *chan, |
badfe9f5 | 762 | struct lttng_event *event); |
80f87dd2 | 763 | int lttng_syscall_filter_disable(struct lttng_channel *chan, |
badfe9f5 | 764 | struct lttng_event *event); |
12e579db MD |
765 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
766 | struct lttng_kernel_syscall_mask __user *usyscall_mask); | |
1ec65de1 | 767 | #else |
a90917c3 | 768 | static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
1ec65de1 MD |
769 | { |
770 | return -ENOSYS; | |
771 | } | |
772 | ||
a90917c3 | 773 | static inline int lttng_syscalls_unregister(struct lttng_channel *chan) |
1ec65de1 MD |
774 | { |
775 | return 0; | |
776 | } | |
80f87dd2 | 777 | |
badfe9f5 MD |
778 | static inline int lttng_syscalls_destroy(struct lttng_channel *chan) |
779 | { | |
780 | return 0; | |
781 | } | |
782 | ||
f127e61e | 783 | static inline int lttng_syscall_filter_enable(struct lttng_channel *chan, |
badfe9f5 | 784 | struct lttng_event *event); |
80f87dd2 MD |
785 | { |
786 | return -ENOSYS; | |
787 | } | |
788 | ||
f127e61e | 789 | static inline int lttng_syscall_filter_disable(struct lttng_channel *chan, |
badfe9f5 | 790 | struct lttng_event *event); |
80f87dd2 MD |
791 | { |
792 | return -ENOSYS; | |
793 | } | |
12e579db | 794 | |
f127e61e | 795 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
12e579db MD |
796 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
797 | { | |
798 | return -ENOSYS; | |
799 | } | |
dffef45d | 800 | |
1ec65de1 MD |
801 | #endif |
802 | ||
07dfc1d0 | 803 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
b2bc0bc8 | 804 | int lttng_event_enabler_attach_bytecode(struct lttng_event_enabler *event_enabler, |
07dfc1d0 | 805 | struct lttng_kernel_filter_bytecode __user *bytecode); |
dffef45d FD |
806 | int lttng_event_notifier_enabler_attach_bytecode( |
807 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
808 | struct lttng_kernel_filter_bytecode __user *bytecode); | |
2dfda770 FD |
809 | |
810 | void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc, | |
811 | struct lttng_ctx *ctx, | |
812 | struct list_head *bytecode_runtime_head, | |
813 | struct lttng_enabler *enabler); | |
07dfc1d0 | 814 | |
114667d5 MD |
815 | int lttng_probes_init(void); |
816 | ||
07dfc1d0 MD |
817 | extern struct lttng_ctx *lttng_static_ctx; |
818 | ||
819 | int lttng_context_init(void); | |
820 | void lttng_context_exit(void); | |
2dccf128 | 821 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
c02eb859 MD |
822 | ssize_t lttng_append_context_index(struct lttng_ctx **ctx_p); |
823 | struct lttng_ctx_field *lttng_get_context_field_from_index(struct lttng_ctx *ctx, | |
824 | size_t index); | |
a9dd15da | 825 | void lttng_context_update(struct lttng_ctx *ctx); |
44252f0f | 826 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
07dfc1d0 | 827 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8289661d MD |
828 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
829 | struct lttng_ctx_field *field); | |
c02eb859 | 830 | void lttng_remove_context_field_index(struct lttng_ctx **ctx_p, size_t index); |
2dccf128 | 831 | void lttng_destroy_context(struct lttng_ctx *ctx); |
8070f5c0 | 832 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
b3699d90 | 833 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
a2563e83 | 834 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
a8ad3613 | 835 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
53f1f0ca | 836 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
b64bc438 MD |
837 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
838 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); | |
839 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); | |
840 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); | |
841 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); | |
975da2c0 | 842 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
79150a49 JD |
843 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
844 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); | |
845 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) | |
846 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); | |
847 | #else | |
848 | static inline | |
849 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) | |
850 | { | |
851 | return -ENOSYS; | |
852 | } | |
853 | #endif | |
854 | #ifdef CONFIG_PREEMPT_RT_FULL | |
855 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); | |
856 | #else | |
857 | static inline | |
858 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) | |
859 | { | |
860 | return -ENOSYS; | |
861 | } | |
862 | #endif | |
2fa2d39a FG |
863 | |
864 | int lttng_add_callstack_to_ctx(struct lttng_ctx **ctx, int type); | |
865 | ||
a6cf40a4 MJ |
866 | #if defined(CONFIG_CGROUPS) && \ |
867 | ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \ | |
868 | LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0)) | |
869 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx); | |
870 | #else | |
871 | static inline | |
872 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx) | |
873 | { | |
874 | return -ENOSYS; | |
875 | } | |
876 | #endif | |
877 | ||
878 | #if defined(CONFIG_IPC_NS) && \ | |
879 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
880 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx); | |
881 | #else | |
882 | static inline | |
883 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx) | |
884 | { | |
885 | return -ENOSYS; | |
886 | } | |
887 | #endif | |
888 | ||
889 | #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \ | |
890 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
891 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx); | |
892 | #else | |
893 | static inline | |
894 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx) | |
895 | { | |
896 | return -ENOSYS; | |
897 | } | |
898 | #endif | |
899 | ||
900 | #if defined(CONFIG_NET_NS) && \ | |
901 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
902 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx); | |
903 | #else | |
904 | static inline | |
905 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx) | |
906 | { | |
907 | return -ENOSYS; | |
908 | } | |
909 | #endif | |
910 | ||
911 | #if defined(CONFIG_PID_NS) && \ | |
912 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
913 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx); | |
914 | #else | |
915 | static inline | |
916 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx) | |
917 | { | |
918 | return -ENOSYS; | |
919 | } | |
920 | #endif | |
921 | ||
922 | #if defined(CONFIG_USER_NS) && \ | |
923 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
924 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx); | |
925 | #else | |
926 | static inline | |
927 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx) | |
928 | { | |
929 | return -ENOSYS; | |
930 | } | |
931 | #endif | |
932 | ||
933 | #if defined(CONFIG_UTS_NS) && \ | |
934 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
935 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx); | |
936 | #else | |
937 | static inline | |
938 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx) | |
939 | { | |
940 | return -ENOSYS; | |
941 | } | |
942 | #endif | |
943 | ||
876e2e92 MJ |
944 | #if defined(CONFIG_TIME_NS) && \ |
945 | (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) | |
946 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx); | |
947 | #else | |
948 | static inline | |
949 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx) | |
950 | { | |
951 | return -ENOSYS; | |
952 | } | |
953 | #endif | |
954 | ||
dc923e75 MJ |
955 | int lttng_add_uid_to_ctx(struct lttng_ctx **ctx); |
956 | int lttng_add_euid_to_ctx(struct lttng_ctx **ctx); | |
957 | int lttng_add_suid_to_ctx(struct lttng_ctx **ctx); | |
958 | int lttng_add_gid_to_ctx(struct lttng_ctx **ctx); | |
959 | int lttng_add_egid_to_ctx(struct lttng_ctx **ctx); | |
960 | int lttng_add_sgid_to_ctx(struct lttng_ctx **ctx); | |
961 | int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); | |
962 | int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); | |
963 | int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); | |
964 | int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); | |
965 | int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); | |
966 | int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); | |
967 | ||
8a3af9ee | 968 | #if defined(CONFIG_PERF_EVENTS) |
c24a0d71 MD |
969 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
970 | uint64_t config, | |
971 | const char *name, | |
972 | struct lttng_ctx **ctx); | |
1e367326 MD |
973 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
974 | struct lttng_cpuhp_node *node); | |
975 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, | |
976 | struct lttng_cpuhp_node *node); | |
1d443b34 MD |
977 | #else |
978 | static inline | |
979 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
980 | uint64_t config, | |
981 | const char *name, | |
982 | struct lttng_ctx **ctx) | |
983 | { | |
984 | return -ENOSYS; | |
985 | } | |
1e367326 MD |
986 | static inline |
987 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, | |
988 | struct lttng_cpuhp_node *node) | |
989 | { | |
990 | return 0; | |
991 | } | |
992 | static inline | |
993 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, | |
994 | struct lttng_cpuhp_node *node) | |
995 | { | |
996 | return 0; | |
997 | } | |
1d443b34 | 998 | #endif |
02119ee5 | 999 | |
0c956676 MD |
1000 | int lttng_logger_init(void); |
1001 | void lttng_logger_exit(void); | |
1002 | ||
c337ddc2 MD |
1003 | extern int lttng_statedump_start(struct lttng_session *session); |
1004 | ||
acd614cc | 1005 | #ifdef CONFIG_KPROBES |
f17701fb MD |
1006 | int lttng_kprobes_register(const char *name, |
1007 | const char *symbol_name, | |
1008 | uint64_t offset, | |
1009 | uint64_t addr, | |
a90917c3 MD |
1010 | struct lttng_event *event); |
1011 | void lttng_kprobes_unregister(struct lttng_event *event); | |
1012 | void lttng_kprobes_destroy_private(struct lttng_event *event); | |
acd614cc MD |
1013 | #else |
1014 | static inline | |
1015 | int lttng_kprobes_register(const char *name, | |
1016 | const char *symbol_name, | |
1017 | uint64_t offset, | |
1018 | uint64_t addr, | |
a90917c3 | 1019 | struct lttng_event *event) |
acd614cc MD |
1020 | { |
1021 | return -ENOSYS; | |
1022 | } | |
1023 | ||
25f53c39 | 1024 | static inline |
a90917c3 | 1025 | void lttng_kprobes_unregister(struct lttng_event *event) |
acd614cc MD |
1026 | { |
1027 | } | |
edeb3137 MD |
1028 | |
1029 | static inline | |
a90917c3 | 1030 | void lttng_kprobes_destroy_private(struct lttng_event *event) |
edeb3137 MD |
1031 | { |
1032 | } | |
acd614cc | 1033 | #endif |
d6d808f3 | 1034 | |
3aed4dca FD |
1035 | int lttng_event_add_callsite(struct lttng_event *event, |
1036 | struct lttng_kernel_event_callsite *callsite); | |
e33fc900 | 1037 | |
149b9a9d YB |
1038 | #ifdef CONFIG_UPROBES |
1039 | int lttng_uprobes_register(const char *name, | |
3aed4dca FD |
1040 | int fd, struct lttng_event *event); |
1041 | int lttng_uprobes_add_callsite(struct lttng_event *event, | |
1042 | struct lttng_kernel_event_callsite *callsite); | |
149b9a9d YB |
1043 | void lttng_uprobes_unregister(struct lttng_event *event); |
1044 | void lttng_uprobes_destroy_private(struct lttng_event *event); | |
1045 | #else | |
1046 | static inline | |
1047 | int lttng_uprobes_register(const char *name, | |
3aed4dca FD |
1048 | int fd, struct lttng_event *event) |
1049 | { | |
1050 | return -ENOSYS; | |
1051 | } | |
1052 | ||
1053 | static inline | |
1054 | int lttng_uprobes_add_callsite(struct lttng_event *event, | |
e33fc900 | 1055 | struct lttng_kernel_event_callsite *callsite) |
149b9a9d YB |
1056 | { |
1057 | return -ENOSYS; | |
1058 | } | |
1059 | ||
1060 | static inline | |
1061 | void lttng_uprobes_unregister(struct lttng_event *event) | |
1062 | { | |
1063 | } | |
1064 | ||
1065 | static inline | |
1066 | void lttng_uprobes_destroy_private(struct lttng_event *event) | |
1067 | { | |
1068 | } | |
1069 | #endif | |
1070 | ||
7371f44c MD |
1071 | #ifdef CONFIG_KRETPROBES |
1072 | int lttng_kretprobes_register(const char *name, | |
1073 | const char *symbol_name, | |
1074 | uint64_t offset, | |
1075 | uint64_t addr, | |
a90917c3 MD |
1076 | struct lttng_event *event_entry, |
1077 | struct lttng_event *event_exit); | |
1078 | void lttng_kretprobes_unregister(struct lttng_event *event); | |
1079 | void lttng_kretprobes_destroy_private(struct lttng_event *event); | |
a0493bef MD |
1080 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
1081 | int enable); | |
7371f44c MD |
1082 | #else |
1083 | static inline | |
1084 | int lttng_kretprobes_register(const char *name, | |
1085 | const char *symbol_name, | |
1086 | uint64_t offset, | |
1087 | uint64_t addr, | |
a90917c3 MD |
1088 | struct lttng_event *event_entry, |
1089 | struct lttng_event *event_exit) | |
7371f44c MD |
1090 | { |
1091 | return -ENOSYS; | |
1092 | } | |
1093 | ||
1094 | static inline | |
a90917c3 | 1095 | void lttng_kretprobes_unregister(struct lttng_event *event) |
7371f44c MD |
1096 | { |
1097 | } | |
1098 | ||
1099 | static inline | |
a90917c3 | 1100 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
7371f44c MD |
1101 | { |
1102 | } | |
a0493bef MD |
1103 | |
1104 | static inline | |
1105 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, | |
1106 | int enable) | |
1107 | { | |
1108 | return -ENOSYS; | |
1109 | } | |
7371f44c MD |
1110 | #endif |
1111 | ||
3db41b2c | 1112 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
57105fc2 | 1113 | |
271b6681 | 1114 | extern const struct file_operations lttng_tracepoint_list_fops; |
2d2464bd | 1115 | extern const struct file_operations lttng_syscall_list_fops; |
271b6681 | 1116 | |
ef200626 | 1117 | #define TRACEPOINT_HAS_DATA_ARG |
ef200626 | 1118 | |
ceabb767 MD |
1119 | static inline bool lttng_is_bytewise_integer(const struct lttng_type *type) |
1120 | { | |
1121 | if (type->atype != atype_integer) | |
1122 | return false; | |
1123 | switch (type->u.integer.size) { | |
1124 | case 8: /* Fall-through. */ | |
1125 | case 16: /* Fall-through. */ | |
1126 | case 32: /* Fall-through. */ | |
1127 | case 64: | |
1128 | break; | |
1129 | default: | |
1130 | return false; | |
1131 | } | |
1132 | return true; | |
1133 | } | |
1134 | ||
a90917c3 | 1135 | #endif /* _LTTNG_EVENTS_H */ |