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