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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 | ||
3a523f5b | 13 | #include <linux/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 | |
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; | |
7fad9b39 | 173 | struct lttng_event_notifier *event_notifier; // Not sure if we will ever need it. |
79150a49 JD |
174 | uint8_t interruptible; |
175 | }; | |
176 | ||
ba1f5986 | 177 | struct lttng_ctx_field { |
8070f5c0 | 178 | struct lttng_event_field event_field; |
f1676205 | 179 | size_t (*get_size)(size_t offset); |
1474c8e2 FG |
180 | size_t (*get_size_arg)(size_t offset, struct lttng_ctx_field *field, |
181 | struct lib_ring_buffer_ctx *ctx, | |
182 | struct lttng_channel *chan); | |
f1676205 MD |
183 | void (*record)(struct lttng_ctx_field *field, |
184 | struct lib_ring_buffer_ctx *ctx, | |
a90917c3 | 185 | struct lttng_channel *chan); |
07dfc1d0 | 186 | void (*get_value)(struct lttng_ctx_field *field, |
79150a49 | 187 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 | 188 | union lttng_ctx_value *value); |
ba1f5986 | 189 | union { |
2001023e | 190 | struct lttng_perf_counter_field *perf_counter; |
ba1f5986 | 191 | } u; |
2dccf128 | 192 | void (*destroy)(struct lttng_ctx_field *field); |
3c1a57e8 MD |
193 | /* |
194 | * Private data to keep state between get_size and record. | |
195 | * User must perform its own synchronization to protect against | |
196 | * concurrent and reentrant contexts. | |
197 | */ | |
198 | void *priv; | |
ba1f5986 MD |
199 | }; |
200 | ||
201 | struct lttng_ctx { | |
833ad6a0 | 202 | struct lttng_ctx_field *fields; |
0d1a681e | 203 | unsigned int nr_fields; |
ba1f5986 | 204 | unsigned int allocated_fields; |
a9dd15da | 205 | size_t largest_align; /* in bytes */ |
0d1a681e MD |
206 | }; |
207 | ||
208 | struct lttng_event_desc { | |
a26a7e4f MD |
209 | const char *name; /* lttng-modules name */ |
210 | const char *kname; /* Linux kernel name (tracepoints) */ | |
c0edae1d | 211 | void *probe_callback; |
0d1a681e MD |
212 | const struct lttng_event_ctx *ctx; /* context */ |
213 | const struct lttng_event_field *fields; /* event payload */ | |
c0edae1d | 214 | unsigned int nr_fields; |
dc7f600a | 215 | struct module *owner; |
7fad9b39 | 216 | void *event_notifier_callback; |
c0edae1d MD |
217 | }; |
218 | ||
85a9ca7f | 219 | struct lttng_probe_desc { |
3c997079 | 220 | const char *provider; |
f7bdf4db | 221 | const struct lttng_event_desc **event_desc; |
85a9ca7f MD |
222 | unsigned int nr_events; |
223 | struct list_head head; /* chain registered probes */ | |
3c997079 MD |
224 | struct list_head lazy_init_head; |
225 | int lazy; /* lazy registration */ | |
85a9ca7f MD |
226 | }; |
227 | ||
7371f44c MD |
228 | struct lttng_krp; /* Kretprobe handling */ |
229 | ||
3c997079 MD |
230 | enum lttng_event_type { |
231 | LTTNG_TYPE_EVENT = 0, | |
232 | LTTNG_TYPE_ENABLER = 1, | |
233 | }; | |
234 | ||
89ec2b91 FD |
235 | enum lttng_bytecode_node_type { |
236 | LTTNG_BYTECODE_NODE_TYPE_FILTER, | |
237 | }; | |
238 | ||
239 | struct lttng_bytecode_node { | |
240 | enum lttng_bytecode_node_type type; | |
07dfc1d0 MD |
241 | struct list_head node; |
242 | struct lttng_enabler *enabler; | |
89ec2b91 FD |
243 | struct { |
244 | uint32_t len; | |
245 | uint32_t reloc_offset; | |
246 | uint64_t seqnum; | |
247 | char data[]; | |
248 | } bc; | |
07dfc1d0 MD |
249 | }; |
250 | ||
251 | /* | |
80c2a69a | 252 | * Bytecode interpreter return value masks. |
07dfc1d0 | 253 | */ |
80c2a69a FD |
254 | enum lttng_bytecode_interpreter_ret { |
255 | LTTNG_INTERPRETER_DISCARD = 0, | |
256 | LTTNG_INTERPRETER_RECORD_FLAG = (1ULL << 0), | |
07dfc1d0 MD |
257 | /* Other bits are kept for future use. */ |
258 | }; | |
259 | ||
260 | struct lttng_bytecode_runtime { | |
261 | /* Associated bytecode */ | |
89ec2b91 | 262 | struct lttng_bytecode_node *bc; |
3d650c7b FD |
263 | union { |
264 | uint64_t (*filter)(void *filter_data, | |
265 | struct lttng_probe_ctx *lttng_probe_ctx, | |
266 | const char *filter_stack_data); | |
267 | } interpreter_funcs; | |
07dfc1d0 MD |
268 | int link_failed; |
269 | struct list_head node; /* list of bytecode runtime in event */ | |
2dfda770 | 270 | struct lttng_ctx *ctx; |
07dfc1d0 MD |
271 | }; |
272 | ||
3c997079 MD |
273 | /* |
274 | * Objects in a linked-list of enablers, owned by an event. | |
275 | */ | |
276 | struct lttng_enabler_ref { | |
277 | struct list_head node; /* enabler ref list */ | |
278 | struct lttng_enabler *ref; /* backward ref */ | |
279 | }; | |
280 | ||
3aed4dca | 281 | struct lttng_uprobe_handler { |
83b802dc FD |
282 | union { |
283 | struct lttng_event *event; | |
9de67196 | 284 | struct lttng_event_notifier *event_notifier; |
83b802dc | 285 | } u; |
3aed4dca FD |
286 | loff_t offset; |
287 | struct uprobe_consumer up_consumer; | |
288 | struct list_head node; | |
289 | }; | |
290 | ||
8bf17deb FD |
291 | struct lttng_kprobe { |
292 | struct kprobe kp; | |
293 | char *symbol_name; | |
294 | }; | |
295 | ||
83b802dc FD |
296 | struct lttng_uprobe { |
297 | struct inode *inode; | |
298 | struct list_head head; | |
299 | }; | |
300 | ||
badfe9f5 MD |
301 | enum lttng_syscall_entryexit { |
302 | LTTNG_SYSCALL_ENTRY, | |
303 | LTTNG_SYSCALL_EXIT, | |
304 | }; | |
305 | ||
306 | enum lttng_syscall_abi { | |
307 | LTTNG_SYSCALL_ABI_NATIVE, | |
308 | LTTNG_SYSCALL_ABI_COMPAT, | |
309 | }; | |
310 | ||
85a9ca7f | 311 | /* |
a90917c3 | 312 | * lttng_event structure is referred to by the tracing fast path. It must be |
85a9ca7f MD |
313 | * kept small. |
314 | */ | |
a90917c3 | 315 | struct lttng_event { |
3c997079 | 316 | enum lttng_event_type evtype; /* First field. */ |
85a9ca7f | 317 | unsigned int id; |
a90917c3 | 318 | struct lttng_channel *chan; |
e64957da | 319 | int enabled; |
d3dbe23c | 320 | const struct lttng_event_desc *desc; |
85a9ca7f | 321 | void *filter; |
f1676205 | 322 | struct lttng_ctx *ctx; |
38d024ae | 323 | enum lttng_kernel_instrumentation instrumentation; |
d6d808f3 | 324 | union { |
8bf17deb | 325 | struct lttng_kprobe kprobe; |
7371f44c MD |
326 | struct { |
327 | struct lttng_krp *lttng_krp; | |
328 | char *symbol_name; | |
329 | } kretprobe; | |
83b802dc | 330 | struct lttng_uprobe uprobe; |
badfe9f5 | 331 | struct { |
badfe9f5 MD |
332 | enum lttng_syscall_entryexit entryexit; |
333 | enum lttng_syscall_abi abi; | |
334 | } syscall; | |
d6d808f3 | 335 | } u; |
3c997079 | 336 | struct list_head list; /* Event list in session */ |
9cccf98a | 337 | unsigned int metadata_dumped:1; |
3c997079 MD |
338 | |
339 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
340 | struct list_head enablers_ref_head; | |
341 | struct hlist_node hlist; /* session ht of events */ | |
342 | int registered; /* has reg'd tracepoint probe */ | |
07dfc1d0 | 343 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
183e8b3a | 344 | struct list_head filter_bytecode_runtime_head; |
07dfc1d0 | 345 | int has_enablers_without_bytecode; |
3c997079 MD |
346 | }; |
347 | ||
dffef45d FD |
348 | // FIXME: Really similar to lttng_event above. Could those be merged ? |
349 | struct lttng_event_notifier { | |
350 | enum lttng_event_type evtype; /* First field. */ | |
351 | uint64_t user_token; | |
352 | int enabled; | |
353 | int registered; /* has reg'd tracepoint probe */ | |
354 | const struct lttng_event_desc *desc; | |
355 | void *filter; | |
356 | struct list_head list; /* event_notifier list in event_notifier group */ | |
357 | ||
358 | enum lttng_kernel_instrumentation instrumentation; | |
359 | union { | |
2b16f0c9 | 360 | struct lttng_kprobe kprobe; |
9de67196 | 361 | struct lttng_uprobe uprobe; |
8a8ac9a8 FD |
362 | struct { |
363 | enum lttng_syscall_entryexit entryexit; | |
364 | enum lttng_syscall_abi abi; | |
365 | struct hlist_node node; /* chain registered syscall event_notifier */ | |
366 | unsigned int syscall_id; | |
367 | } syscall; | |
368 | ||
dffef45d FD |
369 | } u; |
370 | ||
371 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
372 | struct list_head enablers_ref_head; | |
373 | struct hlist_node hlist; /* session ht of event_notifiers */ | |
374 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ | |
183e8b3a | 375 | struct list_head filter_bytecode_runtime_head; |
dffef45d FD |
376 | int has_enablers_without_bytecode; |
377 | ||
21f58fb7 | 378 | void (*send_notification)(struct lttng_event_notifier *event_notifier); |
dffef45d FD |
379 | struct lttng_event_notifier_group *group; /* Weak ref */ |
380 | }; | |
381 | ||
3b861b22 FD |
382 | enum lttng_enabler_format_type { |
383 | LTTNG_ENABLER_FORMAT_STAR_GLOB, | |
384 | LTTNG_ENABLER_FORMAT_NAME, | |
3c997079 MD |
385 | }; |
386 | ||
387 | /* | |
388 | * Enabler field, within whatever object is enabling an event. Target of | |
389 | * backward reference. | |
390 | */ | |
391 | struct lttng_enabler { | |
392 | enum lttng_event_type evtype; /* First field. */ | |
393 | ||
3b861b22 | 394 | enum lttng_enabler_format_type format_type; |
3c997079 | 395 | |
608ab495 | 396 | /* head list of struct lttng_bytecode_node */ |
07dfc1d0 | 397 | struct list_head filter_bytecode_head; |
3c997079 MD |
398 | |
399 | struct lttng_kernel_event event_param; | |
b2bc0bc8 | 400 | unsigned int enabled:1; |
dffef45d FD |
401 | |
402 | uint64_t user_token; /* User-provided token. */ | |
b2bc0bc8 FD |
403 | }; |
404 | ||
405 | struct lttng_event_enabler { | |
406 | struct lttng_enabler base; | |
407 | struct list_head node; /* per-session list of enablers */ | |
3c997079 | 408 | struct lttng_channel *chan; |
2954b37c FD |
409 | /* |
410 | * Unused, but kept around to make it explicit that the tracer can do | |
411 | * it. | |
412 | */ | |
3c997079 | 413 | struct lttng_ctx *ctx; |
85a9ca7f MD |
414 | }; |
415 | ||
dffef45d FD |
416 | struct lttng_event_notifier_enabler { |
417 | struct lttng_enabler base; | |
418 | struct list_head node; /* List of event_notifier enablers */ | |
419 | struct lttng_event_notifier_group *group; | |
420 | }; | |
421 | ||
b2bc0bc8 FD |
422 | static inline |
423 | struct lttng_enabler *lttng_event_enabler_as_enabler( | |
424 | struct lttng_event_enabler *event_enabler) | |
425 | { | |
426 | return &event_enabler->base; | |
427 | } | |
428 | ||
dffef45d FD |
429 | static inline |
430 | struct lttng_enabler *lttng_event_notifier_enabler_as_enabler( | |
431 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
432 | { | |
433 | return &event_notifier_enabler->base; | |
434 | } | |
b2bc0bc8 | 435 | |
a90917c3 | 436 | struct lttng_channel_ops { |
85a9ca7f | 437 | struct channel *(*channel_create)(const char *name, |
5cf4b87c | 438 | void *priv, |
85a9ca7f MD |
439 | void *buf_addr, |
440 | size_t subbuf_size, size_t num_subbuf, | |
441 | unsigned int switch_timer_interval, | |
442 | unsigned int read_timer_interval); | |
443 | void (*channel_destroy)(struct channel *chan); | |
444 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); | |
f71ecafa | 445 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
85a9ca7f | 446 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
4e1f08f4 | 447 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
64c796d8 | 448 | uint32_t event_id); |
85a9ca7f MD |
449 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
450 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, | |
451 | size_t len); | |
4ea00e4f JD |
452 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
453 | const void *src, size_t len); | |
58aa5d24 MD |
454 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
455 | int c, size_t len); | |
16f78f3a MD |
456 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
457 | size_t len); | |
458 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, | |
459 | const char __user *src, size_t len); | |
1ec3f75a MD |
460 | /* |
461 | * packet_avail_size returns the available size in the current | |
462 | * packet. Note that the size returned is only a hint, since it | |
463 | * may change due to concurrent writes. | |
464 | */ | |
465 | size_t (*packet_avail_size)(struct channel *chan); | |
71c1d843 | 466 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
24cedcfe MD |
467 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
468 | int (*is_finalized)(struct channel *chan); | |
254ec7bc | 469 | int (*is_disabled)(struct channel *chan); |
3b731ab1 JD |
470 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
471 | struct lib_ring_buffer *bufb, | |
472 | uint64_t *timestamp_begin); | |
473 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, | |
474 | struct lib_ring_buffer *bufb, | |
475 | uint64_t *timestamp_end); | |
476 | int (*events_discarded) (const struct lib_ring_buffer_config *config, | |
477 | struct lib_ring_buffer *bufb, | |
478 | uint64_t *events_discarded); | |
479 | int (*content_size) (const struct lib_ring_buffer_config *config, | |
480 | struct lib_ring_buffer *bufb, | |
481 | uint64_t *content_size); | |
482 | int (*packet_size) (const struct lib_ring_buffer_config *config, | |
483 | struct lib_ring_buffer *bufb, | |
484 | uint64_t *packet_size); | |
485 | int (*stream_id) (const struct lib_ring_buffer_config *config, | |
486 | struct lib_ring_buffer *bufb, | |
487 | uint64_t *stream_id); | |
2348ca17 JD |
488 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
489 | struct lib_ring_buffer *bufb, | |
490 | uint64_t *ts); | |
5b3cf4f9 JD |
491 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
492 | struct lib_ring_buffer *bufb, | |
493 | uint64_t *seq); | |
5594698f JD |
494 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
495 | struct lib_ring_buffer *bufb, | |
496 | uint64_t *id); | |
85a9ca7f MD |
497 | }; |
498 | ||
a90917c3 | 499 | struct lttng_transport { |
a33c9927 MD |
500 | char *name; |
501 | struct module *owner; | |
502 | struct list_head node; | |
a90917c3 | 503 | struct lttng_channel_ops ops; |
a33c9927 MD |
504 | }; |
505 | ||
80f87dd2 MD |
506 | struct lttng_syscall_filter; |
507 | ||
3c997079 MD |
508 | #define LTTNG_EVENT_HT_BITS 12 |
509 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) | |
510 | ||
511 | struct lttng_event_ht { | |
512 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; | |
513 | }; | |
514 | ||
dffef45d FD |
515 | #define LTTNG_EVENT_NOTIFIER_HT_BITS 12 |
516 | #define LTTNG_EVENT_NOTIFIER_HT_SIZE (1U << LTTNG_EVENT_NOTIFIER_HT_BITS) | |
517 | ||
518 | struct lttng_event_notifier_ht { | |
519 | struct hlist_head table[LTTNG_EVENT_NOTIFIER_HT_SIZE]; | |
520 | }; | |
521 | ||
a90917c3 | 522 | struct lttng_channel { |
c099397a | 523 | unsigned int id; |
85a9ca7f | 524 | struct channel *chan; /* Channel buffers */ |
e64957da | 525 | int enabled; |
f1676205 | 526 | struct lttng_ctx *ctx; |
85a9ca7f | 527 | /* Event ID management */ |
a90917c3 | 528 | struct lttng_session *session; |
85a9ca7f MD |
529 | struct file *file; /* File associated to channel */ |
530 | unsigned int free_event_id; /* Next event ID to allocate */ | |
531 | struct list_head list; /* Channel list */ | |
a90917c3 MD |
532 | struct lttng_channel_ops *ops; |
533 | struct lttng_transport *transport; | |
534 | struct lttng_event **sc_table; /* for syscall tracing */ | |
535 | struct lttng_event **compat_sc_table; | |
5b7ac358 MD |
536 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
537 | struct lttng_event **compat_sc_exit_table; | |
a90917c3 MD |
538 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
539 | struct lttng_event *sc_compat_unknown; | |
5b7ac358 MD |
540 | struct lttng_event *sc_exit_unknown; |
541 | struct lttng_event *compat_sc_exit_unknown; | |
80f87dd2 | 542 | struct lttng_syscall_filter *sc_filter; |
9115fbdc | 543 | int header_type; /* 0: unset, 1: compact, 2: large */ |
d83004aa | 544 | enum channel_type channel_type; |
badfe9f5 | 545 | int syscall_all; |
80f87dd2 MD |
546 | unsigned int metadata_dumped:1, |
547 | sys_enter_registered:1, | |
548 | sys_exit_registered:1, | |
3c997079 | 549 | tstate:1; /* Transient enable state */ |
85a9ca7f MD |
550 | }; |
551 | ||
d83004aa JD |
552 | struct lttng_metadata_stream { |
553 | void *priv; /* Ring buffer private data */ | |
554 | struct lttng_metadata_cache *metadata_cache; | |
f613e3e6 MD |
555 | unsigned int metadata_in; /* Bytes read from the cache */ |
556 | unsigned int metadata_out; /* Bytes consumed from stream */ | |
d83004aa JD |
557 | int finalized; /* Has channel been finalized */ |
558 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ | |
559 | struct list_head list; /* Stream list */ | |
b3b8072b | 560 | struct lttng_transport *transport; |
9616f0bf | 561 | uint64_t version; /* Current version of the metadata cache */ |
8b97fd42 | 562 | bool coherent; /* Stream in a coherent state */ |
d83004aa JD |
563 | }; |
564 | ||
114667d5 MD |
565 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
566 | ||
567 | struct lttng_dynamic_len_stack { | |
568 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; | |
569 | size_t offset; | |
570 | }; | |
571 | ||
572 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); | |
e0130fab MD |
573 | |
574 | /* | |
d1f652f8 | 575 | * struct lttng_id_tracker declared in header due to deferencing of *v |
e0130fab MD |
576 | * in RCU_INITIALIZER(v). |
577 | */ | |
d1f652f8 MD |
578 | #define LTTNG_ID_HASH_BITS 6 |
579 | #define LTTNG_ID_TABLE_SIZE (1 << LTTNG_ID_HASH_BITS) | |
e0130fab | 580 | |
d1f652f8 MD |
581 | enum tracker_type { |
582 | TRACKER_PID, | |
583 | TRACKER_VPID, | |
584 | TRACKER_UID, | |
585 | TRACKER_VUID, | |
586 | TRACKER_GID, | |
587 | TRACKER_VGID, | |
588 | ||
589 | TRACKER_UNKNOWN, | |
590 | }; | |
591 | ||
592 | struct lttng_id_tracker_rcu { | |
593 | struct hlist_head id_hash[LTTNG_ID_TABLE_SIZE]; | |
594 | }; | |
595 | ||
596 | struct lttng_id_tracker { | |
597 | struct lttng_session *session; | |
598 | enum tracker_type tracker_type; | |
599 | struct lttng_id_tracker_rcu *p; /* RCU dereferenced. */ | |
e0130fab MD |
600 | }; |
601 | ||
d1f652f8 | 602 | struct lttng_id_hash_node { |
7e6f9ef6 | 603 | struct hlist_node hlist; |
d1f652f8 | 604 | int id; |
7e6f9ef6 MD |
605 | }; |
606 | ||
a90917c3 | 607 | struct lttng_session { |
85a9ca7f | 608 | int active; /* Is trace session active ? */ |
8070f5c0 | 609 | int been_active; /* Has trace session been active ? */ |
85a9ca7f MD |
610 | struct file *file; /* File associated to session */ |
611 | struct list_head chan; /* Channel list head */ | |
612 | struct list_head events; /* Event list head */ | |
613 | struct list_head list; /* Session list */ | |
c099397a | 614 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
d793d5e1 | 615 | uuid_le uuid; /* Trace session unique ID */ |
d83004aa | 616 | struct lttng_metadata_cache *metadata_cache; |
d1f652f8 MD |
617 | struct lttng_id_tracker pid_tracker; |
618 | struct lttng_id_tracker vpid_tracker; | |
619 | struct lttng_id_tracker uid_tracker; | |
620 | struct lttng_id_tracker vuid_tracker; | |
621 | struct lttng_id_tracker gid_tracker; | |
622 | struct lttng_id_tracker vgid_tracker; | |
3c997079 MD |
623 | unsigned int metadata_dumped:1, |
624 | tstate:1; /* Transient enable state */ | |
b2bc0bc8 | 625 | /* List of event enablers */ |
3c997079 MD |
626 | struct list_head enablers_head; |
627 | /* Hash table of events */ | |
628 | struct lttng_event_ht events_ht; | |
7f859fbf | 629 | char name[LTTNG_KERNEL_SESSION_NAME_LEN]; |
1c88f269 | 630 | char creation_time[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN]; |
85a9ca7f MD |
631 | }; |
632 | ||
750b05f2 FD |
633 | struct lttng_event_notifier_group { |
634 | struct file *file; /* File associated to event notifier group */ | |
21f58fb7 | 635 | struct file *notif_file; /* File used to expose notifications to userspace. */ |
750b05f2 | 636 | struct list_head node; /* event notifier group list */ |
dffef45d FD |
637 | struct list_head enablers_head; /* List of enablers */ |
638 | struct list_head event_notifiers_head; /* List of event notifier */ | |
639 | struct lttng_event_notifier_ht event_notifiers_ht; /* Hash table of event notifiers */ | |
750b05f2 FD |
640 | struct lttng_ctx *ctx; /* Contexts for filters. */ |
641 | struct lttng_channel_ops *ops; | |
642 | struct lttng_transport *transport; | |
643 | struct channel *chan; /* Ring buffer channel for event notifier group. */ | |
644 | struct lib_ring_buffer *buf; /* Ring buffer for event notifier group. */ | |
21f58fb7 FD |
645 | wait_queue_head_t read_wait; |
646 | struct irq_work wakeup_pending; /* Pending wakeup irq work. */ | |
8a8ac9a8 FD |
647 | struct lttng_event_notifier *sc_unknown; /* for unknown syscalls */ |
648 | struct lttng_event_notifier *sc_compat_unknown; | |
649 | ||
650 | struct lttng_syscall_filter *sc_filter; | |
651 | ||
652 | struct hlist_head *event_notifier_syscall_dispatch; | |
653 | struct hlist_head *event_notifier_compat_syscall_dispatch; | |
654 | struct hlist_head *event_notifier_exit_syscall_dispatch; | |
655 | struct hlist_head *event_notifier_exit_compat_syscall_dispatch; | |
656 | ||
657 | struct hlist_head event_notifier_unknown_syscall_dispatch; | |
658 | struct hlist_head event_notifier_compat_unknown_syscall_dispatch; | |
659 | struct hlist_head event_notifier_exit_unknown_syscall_dispatch; | |
660 | struct hlist_head event_notifier_exit_compat_unknown_syscall_dispatch; | |
661 | ||
662 | int syscall_all_entry; | |
663 | int syscall_all_exit; | |
664 | ||
665 | unsigned int sys_enter_registered:1, sys_exit_registered:1; | |
666 | ||
667 | struct lttng_counter *error_counter; | |
668 | size_t error_counter_len; | |
750b05f2 FD |
669 | }; |
670 | ||
d83004aa JD |
671 | struct lttng_metadata_cache { |
672 | char *data; /* Metadata cache */ | |
673 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ | |
674 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ | |
3e75e2a7 | 675 | atomic_t producing; /* Metadata being produced (incomplete) */ |
d83004aa JD |
676 | struct kref refcount; /* Metadata cache usage */ |
677 | struct list_head metadata_stream; /* Metadata stream list */ | |
a36580d5 | 678 | uuid_le uuid; /* Trace session unique ID (copy) */ |
9616f0bf JD |
679 | struct mutex lock; /* Produce/consume lock */ |
680 | uint64_t version; /* Current version of the metadata */ | |
d83004aa JD |
681 | }; |
682 | ||
3c997079 MD |
683 | void lttng_lock_sessions(void); |
684 | void lttng_unlock_sessions(void); | |
685 | ||
686 | struct list_head *lttng_get_probe_list_head(void); | |
687 | ||
b2bc0bc8 FD |
688 | struct lttng_event_enabler *lttng_event_enabler_create( |
689 | enum lttng_enabler_format_type format_type, | |
3c997079 MD |
690 | struct lttng_kernel_event *event_param, |
691 | struct lttng_channel *chan); | |
692 | ||
b2bc0bc8 FD |
693 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler); |
694 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler); | |
dffef45d FD |
695 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
696 | struct lttng_event_notifier_group *event_notifier_group, | |
697 | enum lttng_enabler_format_type format_type, | |
698 | struct lttng_kernel_event_notifier *event_notifier_param); | |
699 | ||
700 | int lttng_event_notifier_enabler_enable( | |
701 | struct lttng_event_notifier_enabler *event_notifier_enabler); | |
702 | int lttng_event_notifier_enabler_disable( | |
703 | struct lttng_event_notifier_enabler *event_notifier_enabler); | |
3c997079 | 704 | int lttng_fix_pending_events(void); |
b01155ba | 705 | int lttng_fix_pending_event_notifiers(void); |
3c997079 | 706 | int lttng_session_active(void); |
b01155ba | 707 | bool lttng_event_notifier_active(void); |
3c997079 | 708 | |
a90917c3 MD |
709 | struct lttng_session *lttng_session_create(void); |
710 | int lttng_session_enable(struct lttng_session *session); | |
711 | int lttng_session_disable(struct lttng_session *session); | |
712 | void lttng_session_destroy(struct lttng_session *session); | |
9616f0bf | 713 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
601252cf | 714 | int lttng_session_statedump(struct lttng_session *session); |
d83004aa | 715 | void metadata_cache_destroy(struct kref *kref); |
4e3c1b9b | 716 | |
750b05f2 FD |
717 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void); |
718 | void lttng_event_notifier_group_destroy( | |
719 | struct lttng_event_notifier_group *event_notifier_group); | |
720 | ||
a90917c3 | 721 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
5dbbdb43 MD |
722 | const char *transport_name, |
723 | void *buf_addr, | |
724 | size_t subbuf_size, size_t num_subbuf, | |
725 | unsigned int switch_timer_interval, | |
d83004aa JD |
726 | unsigned int read_timer_interval, |
727 | enum channel_type channel_type); | |
a90917c3 | 728 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
4e3c1b9b MD |
729 | int overwrite, void *buf_addr, |
730 | size_t subbuf_size, size_t num_subbuf, | |
731 | unsigned int switch_timer_interval, | |
732 | unsigned int read_timer_interval); | |
4e3c1b9b | 733 | |
d83004aa | 734 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
a90917c3 | 735 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
3c997079 MD |
736 | struct lttng_kernel_event *event_param, |
737 | void *filter, | |
738 | const struct lttng_event_desc *event_desc, | |
739 | enum lttng_kernel_instrumentation itype); | |
33a39a3c MD |
740 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
741 | struct lttng_kernel_event *event_param, | |
742 | void *filter, | |
743 | const struct lttng_event_desc *event_desc, | |
744 | enum lttng_kernel_instrumentation itype); | |
6dccd6c1 JD |
745 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
746 | struct lttng_kernel_old_event *old_event_param, | |
747 | void *filter, | |
748 | const struct lttng_event_desc *internal_desc); | |
c0e31d2e | 749 | |
dffef45d FD |
750 | struct lttng_event_notifier *lttng_event_notifier_create( |
751 | const struct lttng_event_desc *event_notifier_desc, | |
752 | uint64_t id, | |
753 | struct lttng_event_notifier_group *event_notifier_group, | |
754 | struct lttng_kernel_event_notifier *event_notifier_param, | |
755 | void *filter, | |
756 | enum lttng_kernel_instrumentation itype); | |
757 | struct lttng_event_notifier *_lttng_event_notifier_create( | |
758 | const struct lttng_event_desc *event_notifier_desc, | |
759 | uint64_t id, | |
760 | struct lttng_event_notifier_group *event_notifier_group, | |
761 | struct lttng_kernel_event_notifier *event_notifier_param, | |
762 | void *filter, | |
763 | enum lttng_kernel_instrumentation itype); | |
764 | ||
a90917c3 MD |
765 | int lttng_channel_enable(struct lttng_channel *channel); |
766 | int lttng_channel_disable(struct lttng_channel *channel); | |
767 | int lttng_event_enable(struct lttng_event *event); | |
768 | int lttng_event_disable(struct lttng_event *event); | |
e64957da | 769 | |
2b16f0c9 FD |
770 | int lttng_event_notifier_enable(struct lttng_event_notifier *event_notifier); |
771 | int lttng_event_notifier_disable(struct lttng_event_notifier *event_notifier); | |
772 | ||
a90917c3 MD |
773 | void lttng_transport_register(struct lttng_transport *transport); |
774 | void lttng_transport_unregister(struct lttng_transport *transport); | |
11b5a3c2 | 775 | |
360f38ea | 776 | void synchronize_trace(void); |
80996790 | 777 | int lttng_abi_init(void); |
6dccd6c1 | 778 | int lttng_abi_compat_old_init(void); |
80996790 | 779 | void lttng_abi_exit(void); |
6dccd6c1 | 780 | void lttng_abi_compat_old_exit(void); |
1c25284c | 781 | |
a90917c3 MD |
782 | int lttng_probe_register(struct lttng_probe_desc *desc); |
783 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
0bcedee9 FD |
784 | const struct lttng_event_desc *lttng_event_desc_get(const char *name); |
785 | void lttng_event_desc_put(const struct lttng_event_desc *desc); | |
a90917c3 MD |
786 | int lttng_probes_init(void); |
787 | void lttng_probes_exit(void); | |
1ec65de1 | 788 | |
b3b8072b | 789 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
8b97fd42 | 790 | struct channel *chan, bool *coherent); |
d83004aa | 791 | |
d1f652f8 MD |
792 | int lttng_id_tracker_get_node_id(const struct lttng_id_hash_node *node); |
793 | int lttng_id_tracker_empty_set(struct lttng_id_tracker *lf); | |
794 | void lttng_id_tracker_destroy(struct lttng_id_tracker *lf, bool rcu); | |
795 | bool lttng_id_tracker_lookup(struct lttng_id_tracker_rcu *p, int id); | |
796 | int lttng_id_tracker_add(struct lttng_id_tracker *lf, int id); | |
797 | int lttng_id_tracker_del(struct lttng_id_tracker *lf, int id); | |
e0130fab | 798 | |
d1f652f8 MD |
799 | int lttng_session_track_id(struct lttng_session *session, |
800 | enum tracker_type tracker_type, int id); | |
801 | int lttng_session_untrack_id(struct lttng_session *session, | |
802 | enum tracker_type tracker_type, int id); | |
e0130fab | 803 | |
d1f652f8 MD |
804 | int lttng_session_list_tracker_ids(struct lttng_session *session, |
805 | enum tracker_type tracker_type); | |
7e6f9ef6 | 806 | |
2754583e MD |
807 | void lttng_clock_ref(void); |
808 | void lttng_clock_unref(void); | |
809 | ||
8a8ac9a8 FD |
810 | int lttng_desc_match_enabler(const struct lttng_event_desc *desc, |
811 | struct lttng_enabler *enabler); | |
812 | ||
3a523f5b | 813 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
2d6d88c6 FD |
814 | int lttng_syscalls_register_event(struct lttng_channel *chan, void *filter); |
815 | int lttng_syscalls_unregister_event(struct lttng_channel *chan); | |
816 | int lttng_syscalls_destroy_event(struct lttng_channel *chan); | |
ade8a729 FD |
817 | int lttng_syscall_filter_enable_event( |
818 | struct lttng_channel *chan, | |
badfe9f5 | 819 | struct lttng_event *event); |
ade8a729 FD |
820 | int lttng_syscall_filter_disable_event( |
821 | struct lttng_channel *chan, | |
badfe9f5 | 822 | struct lttng_event *event); |
ade8a729 | 823 | |
12e579db MD |
824 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
825 | struct lttng_kernel_syscall_mask __user *usyscall_mask); | |
2d6d88c6 | 826 | |
8a8ac9a8 FD |
827 | int lttng_syscalls_register_event_notifier( |
828 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
829 | void *filter); | |
830 | int lttng_syscals_create_matching_event_notifiers( | |
831 | struct lttng_event_notifier_enabler *event_notifier_enabler, void *filter); | |
832 | int lttng_syscalls_unregister_event_notifier(struct lttng_event_notifier_group *group); | |
833 | int lttng_syscall_filter_enable_event_notifier(struct lttng_event_notifier *event_notifier); | |
834 | int lttng_syscall_filter_disable_event_notifier(struct lttng_event_notifier *event_notifier); | |
1ec65de1 | 835 | #else |
2d6d88c6 FD |
836 | static inline int lttng_syscalls_register_event( |
837 | struct lttng_channel *chan, void *filter) | |
1ec65de1 MD |
838 | { |
839 | return -ENOSYS; | |
840 | } | |
841 | ||
2d6d88c6 | 842 | static inline int lttng_syscalls_unregister_event(struct lttng_channel *chan) |
1ec65de1 MD |
843 | { |
844 | return 0; | |
845 | } | |
80f87dd2 | 846 | |
badfe9f5 MD |
847 | static inline int lttng_syscalls_destroy(struct lttng_channel *chan) |
848 | { | |
849 | return 0; | |
850 | } | |
851 | ||
2d6d88c6 | 852 | static inline int lttng_syscall_filter_enable_event(struct lttng_channel *chan, |
badfe9f5 | 853 | struct lttng_event *event); |
80f87dd2 MD |
854 | { |
855 | return -ENOSYS; | |
856 | } | |
857 | ||
2d6d88c6 | 858 | static inline int lttng_syscall_filter_disable_event(struct lttng_channel *chan, |
badfe9f5 | 859 | struct lttng_event *event); |
80f87dd2 MD |
860 | { |
861 | return -ENOSYS; | |
862 | } | |
12e579db | 863 | |
f127e61e | 864 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
12e579db MD |
865 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
866 | { | |
867 | return -ENOSYS; | |
868 | } | |
dffef45d | 869 | |
8a8ac9a8 FD |
870 | static inline int lttng_syscalls_register_event_notifier( |
871 | struct lttng_event_notifier_group *group, void *filter) | |
872 | { | |
873 | return -ENOSYS; | |
874 | } | |
875 | ||
876 | static inline int lttng_syscalls_unregister_event_notifier( | |
877 | struct lttng_event_notifier_group *group) | |
878 | { | |
879 | return 0; | |
880 | } | |
881 | ||
882 | static inline int lttng_syscall_filter_enable_event_notifier( | |
883 | struct lttng_event_notifier_group *group, | |
884 | const char *name) | |
885 | { | |
886 | return -ENOSYS; | |
887 | } | |
888 | ||
889 | static inline int lttng_syscall_filter_disable_event_notifier( | |
890 | struct lttng_event_notifier_group *group, | |
891 | const char *name) | |
892 | { | |
893 | return -ENOSYS; | |
894 | } | |
895 | ||
1ec65de1 MD |
896 | #endif |
897 | ||
183e8b3a | 898 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
07dfc1d0 | 899 | struct lttng_kernel_filter_bytecode __user *bytecode); |
183e8b3a | 900 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
dffef45d FD |
901 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
902 | struct lttng_kernel_filter_bytecode __user *bytecode); | |
2dfda770 FD |
903 | |
904 | void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc, | |
905 | struct lttng_ctx *ctx, | |
60206944 FD |
906 | struct list_head *instance_bytecode_runtime_head, |
907 | struct list_head *enabler_bytecode_runtime_head); | |
07dfc1d0 | 908 | |
114667d5 MD |
909 | int lttng_probes_init(void); |
910 | ||
07dfc1d0 MD |
911 | extern struct lttng_ctx *lttng_static_ctx; |
912 | ||
913 | int lttng_context_init(void); | |
914 | void lttng_context_exit(void); | |
2dccf128 | 915 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
c02eb859 MD |
916 | ssize_t lttng_append_context_index(struct lttng_ctx **ctx_p); |
917 | struct lttng_ctx_field *lttng_get_context_field_from_index(struct lttng_ctx *ctx, | |
918 | size_t index); | |
a9dd15da | 919 | void lttng_context_update(struct lttng_ctx *ctx); |
44252f0f | 920 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
07dfc1d0 | 921 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8289661d MD |
922 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
923 | struct lttng_ctx_field *field); | |
c02eb859 | 924 | void lttng_remove_context_field_index(struct lttng_ctx **ctx_p, size_t index); |
2dccf128 | 925 | void lttng_destroy_context(struct lttng_ctx *ctx); |
8070f5c0 | 926 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
b3699d90 | 927 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
a2563e83 | 928 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
a8ad3613 | 929 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
53f1f0ca | 930 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
b64bc438 MD |
931 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
932 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); | |
933 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); | |
934 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); | |
935 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); | |
975da2c0 | 936 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
79150a49 JD |
937 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
938 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); | |
939 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) | |
940 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); | |
941 | #else | |
942 | static inline | |
943 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) | |
944 | { | |
945 | return -ENOSYS; | |
946 | } | |
947 | #endif | |
948 | #ifdef CONFIG_PREEMPT_RT_FULL | |
949 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); | |
950 | #else | |
951 | static inline | |
952 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) | |
953 | { | |
954 | return -ENOSYS; | |
955 | } | |
956 | #endif | |
2fa2d39a FG |
957 | |
958 | int lttng_add_callstack_to_ctx(struct lttng_ctx **ctx, int type); | |
959 | ||
a6cf40a4 MJ |
960 | #if defined(CONFIG_CGROUPS) && \ |
961 | ((LINUX_VERSION_CODE >= KERNEL_VERSION(4,6,0)) || \ | |
962 | LTTNG_UBUNTU_KERNEL_RANGE(4,4,0,0, 4,5,0,0)) | |
963 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx); | |
964 | #else | |
965 | static inline | |
966 | int lttng_add_cgroup_ns_to_ctx(struct lttng_ctx **ctx) | |
967 | { | |
968 | return -ENOSYS; | |
969 | } | |
970 | #endif | |
971 | ||
972 | #if defined(CONFIG_IPC_NS) && \ | |
973 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
974 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx); | |
975 | #else | |
976 | static inline | |
977 | int lttng_add_ipc_ns_to_ctx(struct lttng_ctx **ctx) | |
978 | { | |
979 | return -ENOSYS; | |
980 | } | |
981 | #endif | |
982 | ||
983 | #if !defined(LTTNG_MNT_NS_MISSING_HEADER) && \ | |
984 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
985 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx); | |
986 | #else | |
987 | static inline | |
988 | int lttng_add_mnt_ns_to_ctx(struct lttng_ctx **ctx) | |
989 | { | |
990 | return -ENOSYS; | |
991 | } | |
992 | #endif | |
993 | ||
994 | #if defined(CONFIG_NET_NS) && \ | |
995 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
996 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx); | |
997 | #else | |
998 | static inline | |
999 | int lttng_add_net_ns_to_ctx(struct lttng_ctx **ctx) | |
1000 | { | |
1001 | return -ENOSYS; | |
1002 | } | |
1003 | #endif | |
1004 | ||
1005 | #if defined(CONFIG_PID_NS) && \ | |
1006 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
1007 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx); | |
1008 | #else | |
1009 | static inline | |
1010 | int lttng_add_pid_ns_to_ctx(struct lttng_ctx **ctx) | |
1011 | { | |
1012 | return -ENOSYS; | |
1013 | } | |
1014 | #endif | |
1015 | ||
1016 | #if defined(CONFIG_USER_NS) && \ | |
1017 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
1018 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx); | |
1019 | #else | |
1020 | static inline | |
1021 | int lttng_add_user_ns_to_ctx(struct lttng_ctx **ctx) | |
1022 | { | |
1023 | return -ENOSYS; | |
1024 | } | |
1025 | #endif | |
1026 | ||
1027 | #if defined(CONFIG_UTS_NS) && \ | |
1028 | (LINUX_VERSION_CODE >= KERNEL_VERSION(3,8,0)) | |
1029 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx); | |
1030 | #else | |
1031 | static inline | |
1032 | int lttng_add_uts_ns_to_ctx(struct lttng_ctx **ctx) | |
1033 | { | |
1034 | return -ENOSYS; | |
1035 | } | |
1036 | #endif | |
1037 | ||
876e2e92 MJ |
1038 | #if defined(CONFIG_TIME_NS) && \ |
1039 | (LINUX_VERSION_CODE >= KERNEL_VERSION(5,6,0)) | |
1040 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx); | |
1041 | #else | |
1042 | static inline | |
1043 | int lttng_add_time_ns_to_ctx(struct lttng_ctx **ctx) | |
1044 | { | |
1045 | return -ENOSYS; | |
1046 | } | |
1047 | #endif | |
1048 | ||
dc923e75 MJ |
1049 | int lttng_add_uid_to_ctx(struct lttng_ctx **ctx); |
1050 | int lttng_add_euid_to_ctx(struct lttng_ctx **ctx); | |
1051 | int lttng_add_suid_to_ctx(struct lttng_ctx **ctx); | |
1052 | int lttng_add_gid_to_ctx(struct lttng_ctx **ctx); | |
1053 | int lttng_add_egid_to_ctx(struct lttng_ctx **ctx); | |
1054 | int lttng_add_sgid_to_ctx(struct lttng_ctx **ctx); | |
1055 | int lttng_add_vuid_to_ctx(struct lttng_ctx **ctx); | |
1056 | int lttng_add_veuid_to_ctx(struct lttng_ctx **ctx); | |
1057 | int lttng_add_vsuid_to_ctx(struct lttng_ctx **ctx); | |
1058 | int lttng_add_vgid_to_ctx(struct lttng_ctx **ctx); | |
1059 | int lttng_add_vegid_to_ctx(struct lttng_ctx **ctx); | |
1060 | int lttng_add_vsgid_to_ctx(struct lttng_ctx **ctx); | |
1061 | ||
8a3af9ee | 1062 | #if defined(CONFIG_PERF_EVENTS) |
c24a0d71 MD |
1063 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
1064 | uint64_t config, | |
1065 | const char *name, | |
1066 | struct lttng_ctx **ctx); | |
1e367326 MD |
1067 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
1068 | struct lttng_cpuhp_node *node); | |
1069 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, | |
1070 | struct lttng_cpuhp_node *node); | |
1d443b34 MD |
1071 | #else |
1072 | static inline | |
1073 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
1074 | uint64_t config, | |
1075 | const char *name, | |
1076 | struct lttng_ctx **ctx) | |
1077 | { | |
1078 | return -ENOSYS; | |
1079 | } | |
1e367326 MD |
1080 | static inline |
1081 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, | |
1082 | struct lttng_cpuhp_node *node) | |
1083 | { | |
1084 | return 0; | |
1085 | } | |
1086 | static inline | |
1087 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, | |
1088 | struct lttng_cpuhp_node *node) | |
1089 | { | |
1090 | return 0; | |
1091 | } | |
1d443b34 | 1092 | #endif |
02119ee5 | 1093 | |
0c956676 MD |
1094 | int lttng_logger_init(void); |
1095 | void lttng_logger_exit(void); | |
1096 | ||
c337ddc2 MD |
1097 | extern int lttng_statedump_start(struct lttng_session *session); |
1098 | ||
acd614cc | 1099 | #ifdef CONFIG_KPROBES |
8bf17deb | 1100 | int lttng_kprobes_register_event(const char *name, |
f17701fb MD |
1101 | const char *symbol_name, |
1102 | uint64_t offset, | |
1103 | uint64_t addr, | |
a90917c3 | 1104 | struct lttng_event *event); |
8bf17deb FD |
1105 | void lttng_kprobes_unregister_event(struct lttng_event *event); |
1106 | void lttng_kprobes_destroy_event_private(struct lttng_event *event); | |
2b16f0c9 FD |
1107 | int lttng_kprobes_register_event_notifier(const char *symbol_name, |
1108 | uint64_t offset, | |
1109 | uint64_t addr, | |
1110 | struct lttng_event_notifier *event_notifier); | |
1111 | void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier); | |
1112 | void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier); | |
acd614cc MD |
1113 | #else |
1114 | static inline | |
8bf17deb | 1115 | int lttng_kprobes_register_event(const char *name, |
acd614cc MD |
1116 | const char *symbol_name, |
1117 | uint64_t offset, | |
1118 | uint64_t addr, | |
a90917c3 | 1119 | struct lttng_event *event) |
acd614cc MD |
1120 | { |
1121 | return -ENOSYS; | |
1122 | } | |
1123 | ||
25f53c39 | 1124 | static inline |
8bf17deb FD |
1125 | void lttng_kprobes_unregister_event(struct lttng_event *event) |
1126 | { | |
1127 | } | |
1128 | ||
1129 | static inline | |
1130 | void lttng_kprobes_destroy_event_private(struct lttng_event *event) | |
acd614cc MD |
1131 | { |
1132 | } | |
edeb3137 MD |
1133 | |
1134 | static inline | |
2b16f0c9 FD |
1135 | int lttng_kprobes_register_event_notifier(const char *symbol_name, |
1136 | uint64_t offset, | |
1137 | uint64_t addr, | |
1138 | struct lttng_event_notifier *event_notifier) | |
1139 | { | |
1140 | return -ENOSYS; | |
1141 | } | |
1142 | ||
1143 | static inline | |
1144 | void lttng_kprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier) | |
1145 | { | |
1146 | } | |
1147 | ||
1148 | static inline | |
1149 | void lttng_kprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier) | |
edeb3137 MD |
1150 | { |
1151 | } | |
acd614cc | 1152 | #endif |
d6d808f3 | 1153 | |
3aed4dca FD |
1154 | int lttng_event_add_callsite(struct lttng_event *event, |
1155 | struct lttng_kernel_event_callsite *callsite); | |
e33fc900 | 1156 | |
9de67196 FD |
1157 | int lttng_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, |
1158 | struct lttng_kernel_event_callsite *callsite); | |
1159 | ||
149b9a9d | 1160 | #ifdef CONFIG_UPROBES |
83b802dc | 1161 | int lttng_uprobes_register_event(const char *name, |
3aed4dca | 1162 | int fd, struct lttng_event *event); |
83b802dc | 1163 | int lttng_uprobes_event_add_callsite(struct lttng_event *event, |
3aed4dca | 1164 | struct lttng_kernel_event_callsite *callsite); |
83b802dc FD |
1165 | void lttng_uprobes_unregister_event(struct lttng_event *event); |
1166 | void lttng_uprobes_destroy_event_private(struct lttng_event *event); | |
9de67196 FD |
1167 | int lttng_uprobes_register_event_notifier(const char *name, |
1168 | int fd, struct lttng_event_notifier *event_notifier); | |
1169 | int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, | |
1170 | struct lttng_kernel_event_callsite *callsite); | |
1171 | void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier); | |
1172 | void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier); | |
149b9a9d YB |
1173 | #else |
1174 | static inline | |
83b802dc | 1175 | int lttng_uprobes_register_event(const char *name, |
3aed4dca FD |
1176 | int fd, struct lttng_event *event) |
1177 | { | |
1178 | return -ENOSYS; | |
1179 | } | |
1180 | ||
1181 | static inline | |
83b802dc | 1182 | int lttng_uprobes_event_add_callsite(struct lttng_event *event, |
e33fc900 | 1183 | struct lttng_kernel_event_callsite *callsite) |
149b9a9d YB |
1184 | { |
1185 | return -ENOSYS; | |
1186 | } | |
1187 | ||
1188 | static inline | |
83b802dc | 1189 | void lttng_uprobes_unregister_event(struct lttng_event *event) |
149b9a9d YB |
1190 | { |
1191 | } | |
1192 | ||
1193 | static inline | |
83b802dc | 1194 | void lttng_uprobes_destroy_event_private(struct lttng_event *event) |
149b9a9d YB |
1195 | { |
1196 | } | |
9de67196 FD |
1197 | |
1198 | static inline | |
1199 | int lttng_uprobes_register_event_notifier(const char *name, | |
1200 | int fd, struct lttng_event_notifier *event_notifier) | |
1201 | { | |
1202 | return -ENOSYS; | |
1203 | } | |
1204 | ||
1205 | static inline | |
1206 | int lttng_uprobes_event_notifier_add_callsite(struct lttng_event_notifier *event_notifier, | |
1207 | struct lttng_kernel_event_callsite *callsite) | |
1208 | { | |
1209 | return -ENOSYS; | |
1210 | } | |
1211 | ||
1212 | static inline | |
1213 | void lttng_uprobes_unregister_event_notifier(struct lttng_event_notifier *event_notifier) | |
1214 | { | |
1215 | } | |
1216 | ||
1217 | static inline | |
1218 | void lttng_uprobes_destroy_event_notifier_private(struct lttng_event_notifier *event_notifier) | |
1219 | { | |
1220 | } | |
149b9a9d YB |
1221 | #endif |
1222 | ||
7371f44c MD |
1223 | #ifdef CONFIG_KRETPROBES |
1224 | int lttng_kretprobes_register(const char *name, | |
1225 | const char *symbol_name, | |
1226 | uint64_t offset, | |
1227 | uint64_t addr, | |
a90917c3 MD |
1228 | struct lttng_event *event_entry, |
1229 | struct lttng_event *event_exit); | |
1230 | void lttng_kretprobes_unregister(struct lttng_event *event); | |
1231 | void lttng_kretprobes_destroy_private(struct lttng_event *event); | |
a0493bef MD |
1232 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
1233 | int enable); | |
7371f44c MD |
1234 | #else |
1235 | static inline | |
1236 | int lttng_kretprobes_register(const char *name, | |
1237 | const char *symbol_name, | |
1238 | uint64_t offset, | |
1239 | uint64_t addr, | |
a90917c3 MD |
1240 | struct lttng_event *event_entry, |
1241 | struct lttng_event *event_exit) | |
7371f44c MD |
1242 | { |
1243 | return -ENOSYS; | |
1244 | } | |
1245 | ||
1246 | static inline | |
a90917c3 | 1247 | void lttng_kretprobes_unregister(struct lttng_event *event) |
7371f44c MD |
1248 | { |
1249 | } | |
1250 | ||
1251 | static inline | |
a90917c3 | 1252 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
7371f44c MD |
1253 | { |
1254 | } | |
a0493bef MD |
1255 | |
1256 | static inline | |
1257 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, | |
1258 | int enable) | |
1259 | { | |
1260 | return -ENOSYS; | |
1261 | } | |
7371f44c MD |
1262 | #endif |
1263 | ||
3db41b2c | 1264 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
57105fc2 | 1265 | |
271b6681 | 1266 | extern const struct file_operations lttng_tracepoint_list_fops; |
2d2464bd | 1267 | extern const struct file_operations lttng_syscall_list_fops; |
271b6681 | 1268 | |
ef200626 | 1269 | #define TRACEPOINT_HAS_DATA_ARG |
ef200626 | 1270 | |
ceabb767 MD |
1271 | static inline bool lttng_is_bytewise_integer(const struct lttng_type *type) |
1272 | { | |
1273 | if (type->atype != atype_integer) | |
1274 | return false; | |
1275 | switch (type->u.integer.size) { | |
1276 | case 8: /* Fall-through. */ | |
1277 | case 16: /* Fall-through. */ | |
1278 | case 32: /* Fall-through. */ | |
1279 | case 64: | |
1280 | break; | |
1281 | default: | |
1282 | return false; | |
1283 | } | |
1284 | return true; | |
1285 | } | |
1286 | ||
a90917c3 | 1287 | #endif /* _LTTNG_EVENTS_H */ |