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a90917c3 MD |
1 | #ifndef _LTTNG_EVENTS_H |
2 | #define _LTTNG_EVENTS_H | |
11b5a3c2 | 3 | |
4e3c1b9b | 4 | /* |
a90917c3 | 5 | * lttng-events.h |
4e3c1b9b | 6 | * |
4e3c1b9b | 7 | * Holds LTTng per-session event registry. |
17baffe2 | 8 | * |
886d51a3 MD |
9 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
10 | * | |
11 | * This library is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU Lesser General Public | |
13 | * License as published by the Free Software Foundation; only | |
14 | * version 2.1 of the License. | |
15 | * | |
16 | * This library is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | * Lesser General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU Lesser General Public | |
22 | * License along with this library; if not, write to the Free Software | |
23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
4e3c1b9b MD |
24 | */ |
25 | ||
3a523f5b | 26 | #include <linux/version.h> |
4e3c1b9b | 27 | #include <linux/list.h> |
d6d808f3 | 28 | #include <linux/kprobes.h> |
d83004aa | 29 | #include <linux/kref.h> |
bbd023d6 MD |
30 | #include <wrapper/uuid.h> |
31 | #include <lttng-abi.h> | |
32 | #include <lttng-abi-old.h> | |
4e3c1b9b | 33 | |
06254b0f | 34 | #define lttng_is_signed_type(type) (((type)(-1)) < 0) |
9e7e4892 | 35 | |
a90917c3 MD |
36 | struct lttng_channel; |
37 | struct lttng_session; | |
d83004aa | 38 | struct lttng_metadata_cache; |
1c25284c | 39 | struct lib_ring_buffer_ctx; |
ba1f5986 | 40 | struct perf_event; |
833ad6a0 | 41 | struct perf_event_attr; |
3b731ab1 | 42 | struct lib_ring_buffer_config; |
4e3c1b9b | 43 | |
c0edae1d MD |
44 | /* Type description */ |
45 | ||
c0edae1d MD |
46 | enum abstract_types { |
47 | atype_integer, | |
48 | atype_enum, | |
49 | atype_array, | |
50 | atype_sequence, | |
51 | atype_string, | |
f513b2bf MD |
52 | atype_struct, |
53 | atype_array_compound, /* Array of compound types. */ | |
54 | atype_sequence_compound, /* Sequence of compound types. */ | |
65c85aa6 | 55 | atype_variant, |
c0edae1d MD |
56 | NR_ABSTRACT_TYPES, |
57 | }; | |
58 | ||
c0edae1d | 59 | enum lttng_string_encodings { |
e0a7a7c4 MD |
60 | lttng_encode_none = 0, |
61 | lttng_encode_UTF8 = 1, | |
62 | lttng_encode_ASCII = 2, | |
c0edae1d MD |
63 | NR_STRING_ENCODINGS, |
64 | }; | |
65 | ||
d83004aa JD |
66 | enum channel_type { |
67 | PER_CPU_CHANNEL, | |
68 | METADATA_CHANNEL, | |
69 | }; | |
70 | ||
c0edae1d MD |
71 | struct lttng_enum_entry { |
72 | unsigned long long start, end; /* start and end are inclusive */ | |
73 | const char *string; | |
74 | }; | |
75 | ||
43803cf2 MD |
76 | #define __type_integer(_type, _size, _alignment, _signedness, \ |
77 | _byte_order, _base, _encoding) \ | |
c099397a MD |
78 | { \ |
79 | .atype = atype_integer, \ | |
80 | .u.basic.integer = \ | |
81 | { \ | |
43803cf2 MD |
82 | .size = (_size) ? : sizeof(_type) * CHAR_BIT, \ |
83 | .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \ | |
84 | .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \ | |
85 | .reverse_byte_order = _byte_order != __BYTE_ORDER, \ | |
e0a7a7c4 | 86 | .base = _base, \ |
64c796d8 | 87 | .encoding = lttng_encode_##_encoding, \ |
c099397a MD |
88 | }, \ |
89 | } \ | |
90 | ||
91 | struct lttng_integer_type { | |
92 | unsigned int size; /* in bits */ | |
93 | unsigned short alignment; /* in bits */ | |
9cccf98a MD |
94 | unsigned int signedness:1, |
95 | reverse_byte_order:1; | |
e0a7a7c4 MD |
96 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ |
97 | enum lttng_string_encodings encoding; | |
c099397a MD |
98 | }; |
99 | ||
100 | union _lttng_basic_type { | |
101 | struct lttng_integer_type integer; | |
102 | struct { | |
103 | const char *name; | |
104 | } enumeration; | |
105 | struct { | |
106 | enum lttng_string_encodings encoding; | |
107 | } string; | |
108 | }; | |
109 | ||
110 | struct lttng_basic_type { | |
111 | enum abstract_types atype; | |
112 | union { | |
113 | union _lttng_basic_type basic; | |
114 | } u; | |
c0edae1d MD |
115 | }; |
116 | ||
117 | struct lttng_type { | |
118 | enum abstract_types atype; | |
c0edae1d | 119 | union { |
c099397a | 120 | union _lttng_basic_type basic; |
c0edae1d | 121 | struct { |
c099397a | 122 | struct lttng_basic_type elem_type; |
c0edae1d | 123 | unsigned int length; /* num. elems. */ |
43803cf2 | 124 | unsigned int elem_alignment; /* alignment override */ |
c0edae1d MD |
125 | } array; |
126 | struct { | |
c099397a MD |
127 | struct lttng_basic_type length_type; |
128 | struct lttng_basic_type elem_type; | |
43803cf2 | 129 | unsigned int elem_alignment; /* alignment override */ |
c0edae1d | 130 | } sequence; |
f513b2bf MD |
131 | struct { |
132 | uint32_t nr_fields; | |
133 | struct lttng_event_field *fields; /* Array of fields. */ | |
134 | } _struct; | |
135 | struct { | |
136 | struct lttng_type *elem_type; | |
137 | unsigned int length; /* num. elems. */ | |
138 | } array_compound; | |
139 | struct { | |
140 | struct lttng_type *elem_type; | |
141 | const char *length_name; | |
142 | } sequence_compound; | |
65c85aa6 MD |
143 | struct { |
144 | const char *tag_name; | |
145 | struct lttng_event_field *choices; /* Array of fields. */ | |
146 | uint32_t nr_choices; | |
147 | } variant; | |
c0edae1d | 148 | } u; |
c099397a MD |
149 | }; |
150 | ||
151 | struct lttng_enum { | |
152 | const char *name; | |
153 | struct lttng_type container_type; | |
154 | const struct lttng_enum_entry *entries; | |
155 | unsigned int len; | |
156 | }; | |
c0edae1d MD |
157 | |
158 | /* Event field description */ | |
159 | ||
160 | struct lttng_event_field { | |
161 | const char *name; | |
f17701fb | 162 | struct lttng_type type; |
f127e61e MD |
163 | unsigned int nowrite:1, /* do not write into trace */ |
164 | user:1; /* fetch from user-space */ | |
c0edae1d MD |
165 | }; |
166 | ||
07dfc1d0 MD |
167 | union lttng_ctx_value { |
168 | int64_t s64; | |
169 | const char *str; | |
170 | double d; | |
171 | }; | |
172 | ||
2001023e MD |
173 | /* |
174 | * We need to keep this perf counter field separately from struct | |
175 | * lttng_ctx_field because cpu hotplug needs fixed-location addresses. | |
176 | */ | |
177 | struct lttng_perf_counter_field { | |
178 | struct notifier_block nb; | |
179 | int hp_enable; | |
180 | struct perf_event_attr *attr; | |
181 | struct perf_event **e; /* per-cpu array */ | |
182 | }; | |
183 | ||
79150a49 JD |
184 | struct lttng_probe_ctx { |
185 | struct lttng_event *event; | |
186 | uint8_t interruptible; | |
187 | }; | |
188 | ||
ba1f5986 | 189 | struct lttng_ctx_field { |
8070f5c0 | 190 | struct lttng_event_field event_field; |
f1676205 MD |
191 | size_t (*get_size)(size_t offset); |
192 | void (*record)(struct lttng_ctx_field *field, | |
193 | struct lib_ring_buffer_ctx *ctx, | |
a90917c3 | 194 | struct lttng_channel *chan); |
07dfc1d0 | 195 | void (*get_value)(struct lttng_ctx_field *field, |
79150a49 | 196 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 | 197 | union lttng_ctx_value *value); |
ba1f5986 | 198 | union { |
2001023e | 199 | struct lttng_perf_counter_field *perf_counter; |
ba1f5986 | 200 | } u; |
2dccf128 | 201 | void (*destroy)(struct lttng_ctx_field *field); |
ba1f5986 MD |
202 | }; |
203 | ||
204 | struct lttng_ctx { | |
833ad6a0 | 205 | struct lttng_ctx_field *fields; |
0d1a681e | 206 | unsigned int nr_fields; |
ba1f5986 | 207 | unsigned int allocated_fields; |
a9dd15da | 208 | size_t largest_align; /* in bytes */ |
0d1a681e MD |
209 | }; |
210 | ||
211 | struct lttng_event_desc { | |
a26a7e4f MD |
212 | const char *name; /* lttng-modules name */ |
213 | const char *kname; /* Linux kernel name (tracepoints) */ | |
c0edae1d | 214 | void *probe_callback; |
0d1a681e MD |
215 | const struct lttng_event_ctx *ctx; /* context */ |
216 | const struct lttng_event_field *fields; /* event payload */ | |
c0edae1d | 217 | unsigned int nr_fields; |
dc7f600a | 218 | struct module *owner; |
c0edae1d MD |
219 | }; |
220 | ||
85a9ca7f | 221 | struct lttng_probe_desc { |
3c997079 | 222 | const char *provider; |
f7bdf4db | 223 | const struct lttng_event_desc **event_desc; |
85a9ca7f MD |
224 | unsigned int nr_events; |
225 | struct list_head head; /* chain registered probes */ | |
3c997079 MD |
226 | struct list_head lazy_init_head; |
227 | int lazy; /* lazy registration */ | |
85a9ca7f MD |
228 | }; |
229 | ||
7371f44c MD |
230 | struct lttng_krp; /* Kretprobe handling */ |
231 | ||
3c997079 MD |
232 | enum lttng_event_type { |
233 | LTTNG_TYPE_EVENT = 0, | |
234 | LTTNG_TYPE_ENABLER = 1, | |
235 | }; | |
236 | ||
07dfc1d0 MD |
237 | struct lttng_filter_bytecode_node { |
238 | struct list_head node; | |
239 | struct lttng_enabler *enabler; | |
240 | /* | |
241 | * struct lttng_kernel_filter_bytecode has var. sized array, must be | |
242 | * last field. | |
243 | */ | |
244 | struct lttng_kernel_filter_bytecode bc; | |
245 | }; | |
246 | ||
247 | /* | |
248 | * Filter return value masks. | |
249 | */ | |
250 | enum lttng_filter_ret { | |
251 | LTTNG_FILTER_DISCARD = 0, | |
252 | LTTNG_FILTER_RECORD_FLAG = (1ULL << 0), | |
253 | /* Other bits are kept for future use. */ | |
254 | }; | |
255 | ||
256 | struct lttng_bytecode_runtime { | |
257 | /* Associated bytecode */ | |
258 | struct lttng_filter_bytecode_node *bc; | |
79150a49 JD |
259 | uint64_t (*filter)(void *filter_data, struct lttng_probe_ctx *lttng_probe_ctx, |
260 | const char *filter_stack_data); | |
07dfc1d0 MD |
261 | int link_failed; |
262 | struct list_head node; /* list of bytecode runtime in event */ | |
263 | }; | |
264 | ||
3c997079 MD |
265 | /* |
266 | * Objects in a linked-list of enablers, owned by an event. | |
267 | */ | |
268 | struct lttng_enabler_ref { | |
269 | struct list_head node; /* enabler ref list */ | |
270 | struct lttng_enabler *ref; /* backward ref */ | |
271 | }; | |
272 | ||
85a9ca7f | 273 | /* |
a90917c3 | 274 | * lttng_event structure is referred to by the tracing fast path. It must be |
85a9ca7f MD |
275 | * kept small. |
276 | */ | |
a90917c3 | 277 | struct lttng_event { |
3c997079 | 278 | enum lttng_event_type evtype; /* First field. */ |
85a9ca7f | 279 | unsigned int id; |
a90917c3 | 280 | struct lttng_channel *chan; |
e64957da | 281 | int enabled; |
d3dbe23c | 282 | const struct lttng_event_desc *desc; |
85a9ca7f | 283 | void *filter; |
f1676205 | 284 | struct lttng_ctx *ctx; |
38d024ae | 285 | enum lttng_kernel_instrumentation instrumentation; |
d6d808f3 MD |
286 | union { |
287 | struct { | |
288 | struct kprobe kp; | |
289 | char *symbol_name; | |
290 | } kprobe; | |
7371f44c MD |
291 | struct { |
292 | struct lttng_krp *lttng_krp; | |
293 | char *symbol_name; | |
294 | } kretprobe; | |
e0a7a7c4 MD |
295 | struct { |
296 | char *symbol_name; | |
297 | } ftrace; | |
d6d808f3 | 298 | } u; |
3c997079 | 299 | struct list_head list; /* Event list in session */ |
9cccf98a | 300 | unsigned int metadata_dumped:1; |
3c997079 MD |
301 | |
302 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
303 | struct list_head enablers_ref_head; | |
304 | struct hlist_node hlist; /* session ht of events */ | |
305 | int registered; /* has reg'd tracepoint probe */ | |
07dfc1d0 MD |
306 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
307 | struct list_head bytecode_runtime_head; | |
308 | int has_enablers_without_bytecode; | |
3c997079 MD |
309 | }; |
310 | ||
311 | enum lttng_enabler_type { | |
312 | LTTNG_ENABLER_WILDCARD, | |
313 | LTTNG_ENABLER_NAME, | |
314 | }; | |
315 | ||
316 | /* | |
317 | * Enabler field, within whatever object is enabling an event. Target of | |
318 | * backward reference. | |
319 | */ | |
320 | struct lttng_enabler { | |
321 | enum lttng_event_type evtype; /* First field. */ | |
322 | ||
323 | enum lttng_enabler_type type; | |
324 | ||
325 | struct list_head node; /* per-session list of enablers */ | |
07dfc1d0 MD |
326 | /* head list of struct lttng_ust_filter_bytecode_node */ |
327 | struct list_head filter_bytecode_head; | |
3c997079 MD |
328 | |
329 | struct lttng_kernel_event event_param; | |
330 | struct lttng_channel *chan; | |
331 | struct lttng_ctx *ctx; | |
332 | unsigned int enabled:1; | |
85a9ca7f MD |
333 | }; |
334 | ||
a90917c3 | 335 | struct lttng_channel_ops { |
85a9ca7f | 336 | struct channel *(*channel_create)(const char *name, |
a90917c3 | 337 | struct lttng_channel *lttng_chan, |
85a9ca7f MD |
338 | void *buf_addr, |
339 | size_t subbuf_size, size_t num_subbuf, | |
340 | unsigned int switch_timer_interval, | |
341 | unsigned int read_timer_interval); | |
342 | void (*channel_destroy)(struct channel *chan); | |
343 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); | |
f71ecafa | 344 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
85a9ca7f | 345 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
4e1f08f4 | 346 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
64c796d8 | 347 | uint32_t event_id); |
85a9ca7f MD |
348 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
349 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, | |
350 | size_t len); | |
4ea00e4f JD |
351 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
352 | const void *src, size_t len); | |
58aa5d24 MD |
353 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
354 | int c, size_t len); | |
16f78f3a MD |
355 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
356 | size_t len); | |
357 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, | |
358 | const char __user *src, size_t len); | |
1ec3f75a MD |
359 | /* |
360 | * packet_avail_size returns the available size in the current | |
361 | * packet. Note that the size returned is only a hint, since it | |
362 | * may change due to concurrent writes. | |
363 | */ | |
364 | size_t (*packet_avail_size)(struct channel *chan); | |
71c1d843 | 365 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
24cedcfe MD |
366 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
367 | int (*is_finalized)(struct channel *chan); | |
254ec7bc | 368 | int (*is_disabled)(struct channel *chan); |
3b731ab1 JD |
369 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
370 | struct lib_ring_buffer *bufb, | |
371 | uint64_t *timestamp_begin); | |
372 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, | |
373 | struct lib_ring_buffer *bufb, | |
374 | uint64_t *timestamp_end); | |
375 | int (*events_discarded) (const struct lib_ring_buffer_config *config, | |
376 | struct lib_ring_buffer *bufb, | |
377 | uint64_t *events_discarded); | |
378 | int (*content_size) (const struct lib_ring_buffer_config *config, | |
379 | struct lib_ring_buffer *bufb, | |
380 | uint64_t *content_size); | |
381 | int (*packet_size) (const struct lib_ring_buffer_config *config, | |
382 | struct lib_ring_buffer *bufb, | |
383 | uint64_t *packet_size); | |
384 | int (*stream_id) (const struct lib_ring_buffer_config *config, | |
385 | struct lib_ring_buffer *bufb, | |
386 | uint64_t *stream_id); | |
2348ca17 JD |
387 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
388 | struct lib_ring_buffer *bufb, | |
389 | uint64_t *ts); | |
5b3cf4f9 JD |
390 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
391 | struct lib_ring_buffer *bufb, | |
392 | uint64_t *seq); | |
5594698f JD |
393 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
394 | struct lib_ring_buffer *bufb, | |
395 | uint64_t *id); | |
85a9ca7f MD |
396 | }; |
397 | ||
a90917c3 | 398 | struct lttng_transport { |
a33c9927 MD |
399 | char *name; |
400 | struct module *owner; | |
401 | struct list_head node; | |
a90917c3 | 402 | struct lttng_channel_ops ops; |
a33c9927 MD |
403 | }; |
404 | ||
80f87dd2 MD |
405 | struct lttng_syscall_filter; |
406 | ||
3c997079 MD |
407 | #define LTTNG_EVENT_HT_BITS 12 |
408 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) | |
409 | ||
410 | struct lttng_event_ht { | |
411 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; | |
412 | }; | |
413 | ||
a90917c3 | 414 | struct lttng_channel { |
c099397a | 415 | unsigned int id; |
85a9ca7f | 416 | struct channel *chan; /* Channel buffers */ |
e64957da | 417 | int enabled; |
f1676205 | 418 | struct lttng_ctx *ctx; |
85a9ca7f | 419 | /* Event ID management */ |
a90917c3 | 420 | struct lttng_session *session; |
85a9ca7f MD |
421 | struct file *file; /* File associated to channel */ |
422 | unsigned int free_event_id; /* Next event ID to allocate */ | |
423 | struct list_head list; /* Channel list */ | |
a90917c3 MD |
424 | struct lttng_channel_ops *ops; |
425 | struct lttng_transport *transport; | |
426 | struct lttng_event **sc_table; /* for syscall tracing */ | |
427 | struct lttng_event **compat_sc_table; | |
5b7ac358 MD |
428 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
429 | struct lttng_event **compat_sc_exit_table; | |
a90917c3 MD |
430 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
431 | struct lttng_event *sc_compat_unknown; | |
5b7ac358 MD |
432 | struct lttng_event *sc_exit_unknown; |
433 | struct lttng_event *compat_sc_exit_unknown; | |
80f87dd2 | 434 | struct lttng_syscall_filter *sc_filter; |
9115fbdc | 435 | int header_type; /* 0: unset, 1: compact, 2: large */ |
d83004aa | 436 | enum channel_type channel_type; |
80f87dd2 MD |
437 | unsigned int metadata_dumped:1, |
438 | sys_enter_registered:1, | |
439 | sys_exit_registered:1, | |
3c997079 MD |
440 | syscall_all:1, |
441 | tstate:1; /* Transient enable state */ | |
85a9ca7f MD |
442 | }; |
443 | ||
d83004aa JD |
444 | struct lttng_metadata_stream { |
445 | void *priv; /* Ring buffer private data */ | |
446 | struct lttng_metadata_cache *metadata_cache; | |
f613e3e6 MD |
447 | unsigned int metadata_in; /* Bytes read from the cache */ |
448 | unsigned int metadata_out; /* Bytes consumed from stream */ | |
d83004aa JD |
449 | int finalized; /* Has channel been finalized */ |
450 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ | |
451 | struct list_head list; /* Stream list */ | |
b3b8072b | 452 | struct lttng_transport *transport; |
9616f0bf | 453 | uint64_t version; /* Current version of the metadata cache */ |
d83004aa JD |
454 | }; |
455 | ||
114667d5 MD |
456 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
457 | ||
458 | struct lttng_dynamic_len_stack { | |
459 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; | |
460 | size_t offset; | |
461 | }; | |
462 | ||
463 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); | |
e0130fab MD |
464 | |
465 | /* | |
466 | * struct lttng_pid_tracker declared in header due to deferencing of *v | |
467 | * in RCU_INITIALIZER(v). | |
468 | */ | |
469 | #define LTTNG_PID_HASH_BITS 6 | |
470 | #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS) | |
471 | ||
472 | struct lttng_pid_tracker { | |
473 | struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE]; | |
474 | }; | |
475 | ||
7e6f9ef6 MD |
476 | struct lttng_pid_hash_node { |
477 | struct hlist_node hlist; | |
478 | int pid; | |
479 | }; | |
480 | ||
a90917c3 | 481 | struct lttng_session { |
85a9ca7f | 482 | int active; /* Is trace session active ? */ |
8070f5c0 | 483 | int been_active; /* Has trace session been active ? */ |
85a9ca7f MD |
484 | struct file *file; /* File associated to session */ |
485 | struct list_head chan; /* Channel list head */ | |
486 | struct list_head events; /* Event list head */ | |
487 | struct list_head list; /* Session list */ | |
c099397a | 488 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
d793d5e1 | 489 | uuid_le uuid; /* Trace session unique ID */ |
d83004aa | 490 | struct lttng_metadata_cache *metadata_cache; |
e0130fab | 491 | struct lttng_pid_tracker *pid_tracker; |
3c997079 MD |
492 | unsigned int metadata_dumped:1, |
493 | tstate:1; /* Transient enable state */ | |
494 | /* List of enablers */ | |
495 | struct list_head enablers_head; | |
496 | /* Hash table of events */ | |
497 | struct lttng_event_ht events_ht; | |
85a9ca7f MD |
498 | }; |
499 | ||
d83004aa JD |
500 | struct lttng_metadata_cache { |
501 | char *data; /* Metadata cache */ | |
502 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ | |
503 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ | |
504 | struct kref refcount; /* Metadata cache usage */ | |
505 | struct list_head metadata_stream; /* Metadata stream list */ | |
a36580d5 | 506 | uuid_le uuid; /* Trace session unique ID (copy) */ |
9616f0bf JD |
507 | struct mutex lock; /* Produce/consume lock */ |
508 | uint64_t version; /* Current version of the metadata */ | |
d83004aa JD |
509 | }; |
510 | ||
3c997079 MD |
511 | void lttng_lock_sessions(void); |
512 | void lttng_unlock_sessions(void); | |
513 | ||
514 | struct list_head *lttng_get_probe_list_head(void); | |
515 | ||
516 | struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type, | |
517 | struct lttng_kernel_event *event_param, | |
518 | struct lttng_channel *chan); | |
519 | ||
520 | int lttng_enabler_enable(struct lttng_enabler *enabler); | |
521 | int lttng_enabler_disable(struct lttng_enabler *enabler); | |
522 | int lttng_fix_pending_events(void); | |
523 | int lttng_session_active(void); | |
524 | ||
a90917c3 MD |
525 | struct lttng_session *lttng_session_create(void); |
526 | int lttng_session_enable(struct lttng_session *session); | |
527 | int lttng_session_disable(struct lttng_session *session); | |
528 | void lttng_session_destroy(struct lttng_session *session); | |
9616f0bf | 529 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
d83004aa | 530 | void metadata_cache_destroy(struct kref *kref); |
4e3c1b9b | 531 | |
a90917c3 | 532 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
5dbbdb43 MD |
533 | const char *transport_name, |
534 | void *buf_addr, | |
535 | size_t subbuf_size, size_t num_subbuf, | |
536 | unsigned int switch_timer_interval, | |
d83004aa JD |
537 | unsigned int read_timer_interval, |
538 | enum channel_type channel_type); | |
a90917c3 | 539 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
4e3c1b9b MD |
540 | int overwrite, void *buf_addr, |
541 | size_t subbuf_size, size_t num_subbuf, | |
542 | unsigned int switch_timer_interval, | |
543 | unsigned int read_timer_interval); | |
4e3c1b9b | 544 | |
d83004aa | 545 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
a90917c3 | 546 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
3c997079 MD |
547 | struct lttng_kernel_event *event_param, |
548 | void *filter, | |
549 | const struct lttng_event_desc *event_desc, | |
550 | enum lttng_kernel_instrumentation itype); | |
33a39a3c MD |
551 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
552 | struct lttng_kernel_event *event_param, | |
553 | void *filter, | |
554 | const struct lttng_event_desc *event_desc, | |
555 | enum lttng_kernel_instrumentation itype); | |
6dccd6c1 JD |
556 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
557 | struct lttng_kernel_old_event *old_event_param, | |
558 | void *filter, | |
559 | const struct lttng_event_desc *internal_desc); | |
c0e31d2e | 560 | |
a90917c3 MD |
561 | int lttng_channel_enable(struct lttng_channel *channel); |
562 | int lttng_channel_disable(struct lttng_channel *channel); | |
563 | int lttng_event_enable(struct lttng_event *event); | |
564 | int lttng_event_disable(struct lttng_event *event); | |
e64957da | 565 | |
a90917c3 MD |
566 | void lttng_transport_register(struct lttng_transport *transport); |
567 | void lttng_transport_unregister(struct lttng_transport *transport); | |
11b5a3c2 | 568 | |
360f38ea | 569 | void synchronize_trace(void); |
80996790 | 570 | int lttng_abi_init(void); |
6dccd6c1 | 571 | int lttng_abi_compat_old_init(void); |
80996790 | 572 | void lttng_abi_exit(void); |
6dccd6c1 | 573 | void lttng_abi_compat_old_exit(void); |
1c25284c | 574 | |
a90917c3 MD |
575 | int lttng_probe_register(struct lttng_probe_desc *desc); |
576 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
577 | const struct lttng_event_desc *lttng_event_get(const char *name); | |
578 | void lttng_event_put(const struct lttng_event_desc *desc); | |
579 | int lttng_probes_init(void); | |
580 | void lttng_probes_exit(void); | |
1ec65de1 | 581 | |
b3b8072b MD |
582 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
583 | struct channel *chan); | |
d83004aa | 584 | |
7e6f9ef6 | 585 | int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node); |
e0130fab MD |
586 | struct lttng_pid_tracker *lttng_pid_tracker_create(void); |
587 | void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf); | |
588 | bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid); | |
589 | int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid); | |
590 | int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid); | |
591 | ||
592 | int lttng_session_track_pid(struct lttng_session *session, int pid); | |
593 | int lttng_session_untrack_pid(struct lttng_session *session, int pid); | |
594 | ||
7e6f9ef6 MD |
595 | int lttng_session_list_tracker_pids(struct lttng_session *session); |
596 | ||
2754583e MD |
597 | void lttng_clock_ref(void); |
598 | void lttng_clock_unref(void); | |
599 | ||
3a523f5b | 600 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
a90917c3 MD |
601 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter); |
602 | int lttng_syscalls_unregister(struct lttng_channel *chan); | |
80f87dd2 MD |
603 | int lttng_syscall_filter_enable(struct lttng_channel *chan, |
604 | const char *name); | |
605 | int lttng_syscall_filter_disable(struct lttng_channel *chan, | |
606 | const char *name); | |
12e579db MD |
607 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
608 | struct lttng_kernel_syscall_mask __user *usyscall_mask); | |
1ec65de1 | 609 | #else |
a90917c3 | 610 | static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
1ec65de1 MD |
611 | { |
612 | return -ENOSYS; | |
613 | } | |
614 | ||
a90917c3 | 615 | static inline int lttng_syscalls_unregister(struct lttng_channel *chan) |
1ec65de1 MD |
616 | { |
617 | return 0; | |
618 | } | |
80f87dd2 | 619 | |
f127e61e | 620 | static inline int lttng_syscall_filter_enable(struct lttng_channel *chan, |
80f87dd2 MD |
621 | const char *name) |
622 | { | |
623 | return -ENOSYS; | |
624 | } | |
625 | ||
f127e61e | 626 | static inline int lttng_syscall_filter_disable(struct lttng_channel *chan, |
80f87dd2 MD |
627 | const char *name) |
628 | { | |
629 | return -ENOSYS; | |
630 | } | |
12e579db | 631 | |
f127e61e | 632 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
12e579db MD |
633 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
634 | { | |
635 | return -ENOSYS; | |
636 | } | |
1ec65de1 MD |
637 | #endif |
638 | ||
07dfc1d0 MD |
639 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
640 | int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, | |
641 | struct lttng_kernel_filter_bytecode __user *bytecode); | |
f127e61e MD |
642 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, |
643 | struct lttng_enabler *enabler); | |
07dfc1d0 | 644 | |
114667d5 MD |
645 | int lttng_probes_init(void); |
646 | ||
07dfc1d0 MD |
647 | extern struct lttng_ctx *lttng_static_ctx; |
648 | ||
649 | int lttng_context_init(void); | |
650 | void lttng_context_exit(void); | |
2dccf128 | 651 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
a9dd15da | 652 | void lttng_context_update(struct lttng_ctx *ctx); |
44252f0f | 653 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
07dfc1d0 | 654 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8289661d MD |
655 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
656 | struct lttng_ctx_field *field); | |
2dccf128 | 657 | void lttng_destroy_context(struct lttng_ctx *ctx); |
8070f5c0 | 658 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
b3699d90 | 659 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
a2563e83 | 660 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
a8ad3613 | 661 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
53f1f0ca | 662 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
b64bc438 MD |
663 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
664 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); | |
665 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); | |
666 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); | |
667 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); | |
975da2c0 | 668 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
79150a49 JD |
669 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
670 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); | |
671 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) | |
672 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); | |
673 | #else | |
674 | static inline | |
675 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) | |
676 | { | |
677 | return -ENOSYS; | |
678 | } | |
679 | #endif | |
680 | #ifdef CONFIG_PREEMPT_RT_FULL | |
681 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); | |
682 | #else | |
683 | static inline | |
684 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) | |
685 | { | |
686 | return -ENOSYS; | |
687 | } | |
688 | #endif | |
41c3c24e | 689 | #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) |
c24a0d71 MD |
690 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
691 | uint64_t config, | |
692 | const char *name, | |
693 | struct lttng_ctx **ctx); | |
1d443b34 MD |
694 | #else |
695 | static inline | |
696 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
697 | uint64_t config, | |
698 | const char *name, | |
699 | struct lttng_ctx **ctx) | |
700 | { | |
701 | return -ENOSYS; | |
702 | } | |
703 | #endif | |
02119ee5 | 704 | |
0c956676 MD |
705 | int lttng_logger_init(void); |
706 | void lttng_logger_exit(void); | |
707 | ||
c337ddc2 MD |
708 | extern int lttng_statedump_start(struct lttng_session *session); |
709 | ||
acd614cc | 710 | #ifdef CONFIG_KPROBES |
f17701fb MD |
711 | int lttng_kprobes_register(const char *name, |
712 | const char *symbol_name, | |
713 | uint64_t offset, | |
714 | uint64_t addr, | |
a90917c3 MD |
715 | struct lttng_event *event); |
716 | void lttng_kprobes_unregister(struct lttng_event *event); | |
717 | void lttng_kprobes_destroy_private(struct lttng_event *event); | |
acd614cc MD |
718 | #else |
719 | static inline | |
720 | int lttng_kprobes_register(const char *name, | |
721 | const char *symbol_name, | |
722 | uint64_t offset, | |
723 | uint64_t addr, | |
a90917c3 | 724 | struct lttng_event *event) |
acd614cc MD |
725 | { |
726 | return -ENOSYS; | |
727 | } | |
728 | ||
25f53c39 | 729 | static inline |
a90917c3 | 730 | void lttng_kprobes_unregister(struct lttng_event *event) |
acd614cc MD |
731 | { |
732 | } | |
edeb3137 MD |
733 | |
734 | static inline | |
a90917c3 | 735 | void lttng_kprobes_destroy_private(struct lttng_event *event) |
edeb3137 MD |
736 | { |
737 | } | |
acd614cc | 738 | #endif |
d6d808f3 | 739 | |
7371f44c MD |
740 | #ifdef CONFIG_KRETPROBES |
741 | int lttng_kretprobes_register(const char *name, | |
742 | const char *symbol_name, | |
743 | uint64_t offset, | |
744 | uint64_t addr, | |
a90917c3 MD |
745 | struct lttng_event *event_entry, |
746 | struct lttng_event *event_exit); | |
747 | void lttng_kretprobes_unregister(struct lttng_event *event); | |
748 | void lttng_kretprobes_destroy_private(struct lttng_event *event); | |
a0493bef MD |
749 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
750 | int enable); | |
7371f44c MD |
751 | #else |
752 | static inline | |
753 | int lttng_kretprobes_register(const char *name, | |
754 | const char *symbol_name, | |
755 | uint64_t offset, | |
756 | uint64_t addr, | |
a90917c3 MD |
757 | struct lttng_event *event_entry, |
758 | struct lttng_event *event_exit) | |
7371f44c MD |
759 | { |
760 | return -ENOSYS; | |
761 | } | |
762 | ||
763 | static inline | |
a90917c3 | 764 | void lttng_kretprobes_unregister(struct lttng_event *event) |
7371f44c MD |
765 | { |
766 | } | |
767 | ||
768 | static inline | |
a90917c3 | 769 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
7371f44c MD |
770 | { |
771 | } | |
a0493bef MD |
772 | |
773 | static inline | |
774 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, | |
775 | int enable) | |
776 | { | |
777 | return -ENOSYS; | |
778 | } | |
7371f44c MD |
779 | #endif |
780 | ||
e0a7a7c4 MD |
781 | #ifdef CONFIG_DYNAMIC_FTRACE |
782 | int lttng_ftrace_register(const char *name, | |
783 | const char *symbol_name, | |
a90917c3 MD |
784 | struct lttng_event *event); |
785 | void lttng_ftrace_unregister(struct lttng_event *event); | |
786 | void lttng_ftrace_destroy_private(struct lttng_event *event); | |
e0a7a7c4 MD |
787 | #else |
788 | static inline | |
789 | int lttng_ftrace_register(const char *name, | |
790 | const char *symbol_name, | |
a90917c3 | 791 | struct lttng_event *event) |
e0a7a7c4 | 792 | { |
acd614cc | 793 | return -ENOSYS; |
e0a7a7c4 MD |
794 | } |
795 | ||
796 | static inline | |
a90917c3 | 797 | void lttng_ftrace_unregister(struct lttng_event *event) |
e0a7a7c4 MD |
798 | { |
799 | } | |
edeb3137 MD |
800 | |
801 | static inline | |
a90917c3 | 802 | void lttng_ftrace_destroy_private(struct lttng_event *event) |
edeb3137 MD |
803 | { |
804 | } | |
e0a7a7c4 | 805 | #endif |
271b6681 | 806 | |
3db41b2c | 807 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
57105fc2 | 808 | |
271b6681 | 809 | extern const struct file_operations lttng_tracepoint_list_fops; |
2d2464bd | 810 | extern const struct file_operations lttng_syscall_list_fops; |
271b6681 | 811 | |
ef200626 MD |
812 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) |
813 | #define TRACEPOINT_HAS_DATA_ARG | |
814 | #endif | |
815 | ||
a90917c3 | 816 | #endif /* _LTTNG_EVENTS_H */ |