Commit | Line | Data |
---|---|---|
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> |
1e367326 | 30 | #include <lttng-cpuhotplug.h> |
bbd023d6 | 31 | #include <wrapper/uuid.h> |
f64dd4be | 32 | #include <lttng-tracer.h> |
bbd023d6 MD |
33 | #include <lttng-abi.h> |
34 | #include <lttng-abi-old.h> | |
4e3c1b9b | 35 | |
06254b0f | 36 | #define lttng_is_signed_type(type) (((type)(-1)) < 0) |
9e7e4892 | 37 | |
a90917c3 MD |
38 | struct lttng_channel; |
39 | struct lttng_session; | |
d83004aa | 40 | struct lttng_metadata_cache; |
1c25284c | 41 | struct lib_ring_buffer_ctx; |
ba1f5986 | 42 | struct perf_event; |
833ad6a0 | 43 | struct perf_event_attr; |
3b731ab1 | 44 | struct lib_ring_buffer_config; |
4e3c1b9b | 45 | |
c0edae1d MD |
46 | /* Type description */ |
47 | ||
c0edae1d MD |
48 | enum abstract_types { |
49 | atype_integer, | |
50 | atype_enum, | |
51 | atype_array, | |
52 | atype_sequence, | |
53 | atype_string, | |
f513b2bf MD |
54 | atype_struct, |
55 | atype_array_compound, /* Array of compound types. */ | |
56 | atype_sequence_compound, /* Sequence of compound types. */ | |
65c85aa6 | 57 | atype_variant, |
3834b99f MD |
58 | atype_array_bitfield, |
59 | atype_sequence_bitfield, | |
c0edae1d MD |
60 | NR_ABSTRACT_TYPES, |
61 | }; | |
62 | ||
c0edae1d | 63 | enum lttng_string_encodings { |
e0a7a7c4 MD |
64 | lttng_encode_none = 0, |
65 | lttng_encode_UTF8 = 1, | |
66 | lttng_encode_ASCII = 2, | |
c0edae1d MD |
67 | NR_STRING_ENCODINGS, |
68 | }; | |
69 | ||
d83004aa JD |
70 | enum channel_type { |
71 | PER_CPU_CHANNEL, | |
72 | METADATA_CHANNEL, | |
73 | }; | |
74 | ||
141ddf28 MD |
75 | struct lttng_enum_value { |
76 | unsigned long long value; | |
77 | unsigned int signedness:1; | |
78 | }; | |
79 | ||
c0edae1d | 80 | struct lttng_enum_entry { |
141ddf28 | 81 | struct lttng_enum_value start, end; /* start and end are inclusive */ |
c0edae1d | 82 | const char *string; |
08ad1061 PP |
83 | struct { |
84 | unsigned int is_auto:1; | |
85 | } options; | |
c0edae1d MD |
86 | }; |
87 | ||
43803cf2 MD |
88 | #define __type_integer(_type, _size, _alignment, _signedness, \ |
89 | _byte_order, _base, _encoding) \ | |
c099397a MD |
90 | { \ |
91 | .atype = atype_integer, \ | |
92 | .u.basic.integer = \ | |
93 | { \ | |
43803cf2 MD |
94 | .size = (_size) ? : sizeof(_type) * CHAR_BIT, \ |
95 | .alignment = (_alignment) ? : lttng_alignof(_type) * CHAR_BIT, \ | |
96 | .signedness = (_signedness) >= 0 ? (_signedness) : lttng_is_signed_type(_type), \ | |
97 | .reverse_byte_order = _byte_order != __BYTE_ORDER, \ | |
e0a7a7c4 | 98 | .base = _base, \ |
64c796d8 | 99 | .encoding = lttng_encode_##_encoding, \ |
c099397a MD |
100 | }, \ |
101 | } \ | |
102 | ||
103 | struct lttng_integer_type { | |
104 | unsigned int size; /* in bits */ | |
105 | unsigned short alignment; /* in bits */ | |
9cccf98a MD |
106 | unsigned int signedness:1, |
107 | reverse_byte_order:1; | |
e0a7a7c4 MD |
108 | unsigned int base; /* 2, 8, 10, 16, for pretty print */ |
109 | enum lttng_string_encodings encoding; | |
c099397a MD |
110 | }; |
111 | ||
112 | union _lttng_basic_type { | |
113 | struct lttng_integer_type integer; | |
114 | struct { | |
141ddf28 MD |
115 | const struct lttng_enum_desc *desc; /* Enumeration mapping */ |
116 | struct lttng_integer_type container_type; | |
c099397a MD |
117 | } enumeration; |
118 | struct { | |
119 | enum lttng_string_encodings encoding; | |
120 | } string; | |
121 | }; | |
122 | ||
123 | struct lttng_basic_type { | |
124 | enum abstract_types atype; | |
125 | union { | |
126 | union _lttng_basic_type basic; | |
127 | } u; | |
c0edae1d MD |
128 | }; |
129 | ||
130 | struct lttng_type { | |
131 | enum abstract_types atype; | |
c0edae1d | 132 | union { |
c099397a | 133 | union _lttng_basic_type basic; |
c0edae1d | 134 | struct { |
c099397a | 135 | struct lttng_basic_type elem_type; |
c0edae1d | 136 | unsigned int length; /* num. elems. */ |
43803cf2 | 137 | unsigned int elem_alignment; /* alignment override */ |
c0edae1d MD |
138 | } array; |
139 | struct { | |
c099397a MD |
140 | struct lttng_basic_type length_type; |
141 | struct lttng_basic_type elem_type; | |
43803cf2 | 142 | unsigned int elem_alignment; /* alignment override */ |
c0edae1d | 143 | } sequence; |
f513b2bf MD |
144 | struct { |
145 | uint32_t nr_fields; | |
146 | struct lttng_event_field *fields; /* Array of fields. */ | |
147 | } _struct; | |
148 | struct { | |
149 | struct lttng_type *elem_type; | |
150 | unsigned int length; /* num. elems. */ | |
151 | } array_compound; | |
152 | struct { | |
153 | struct lttng_type *elem_type; | |
154 | const char *length_name; | |
155 | } sequence_compound; | |
65c85aa6 MD |
156 | struct { |
157 | const char *tag_name; | |
158 | struct lttng_event_field *choices; /* Array of fields. */ | |
159 | uint32_t nr_choices; | |
160 | } variant; | |
c0edae1d | 161 | } u; |
c099397a MD |
162 | }; |
163 | ||
141ddf28 | 164 | struct lttng_enum_desc { |
c099397a | 165 | const char *name; |
c099397a | 166 | const struct lttng_enum_entry *entries; |
141ddf28 | 167 | unsigned int nr_entries; |
c099397a | 168 | }; |
c0edae1d MD |
169 | |
170 | /* Event field description */ | |
171 | ||
172 | struct lttng_event_field { | |
173 | const char *name; | |
f17701fb | 174 | struct lttng_type type; |
f127e61e MD |
175 | unsigned int nowrite:1, /* do not write into trace */ |
176 | user:1; /* fetch from user-space */ | |
c0edae1d MD |
177 | }; |
178 | ||
07dfc1d0 MD |
179 | union lttng_ctx_value { |
180 | int64_t s64; | |
181 | const char *str; | |
182 | double d; | |
183 | }; | |
184 | ||
2001023e MD |
185 | /* |
186 | * We need to keep this perf counter field separately from struct | |
187 | * lttng_ctx_field because cpu hotplug needs fixed-location addresses. | |
188 | */ | |
189 | struct lttng_perf_counter_field { | |
1e367326 MD |
190 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(4,10,0)) |
191 | struct lttng_cpuhp_node cpuhp_prepare; | |
192 | struct lttng_cpuhp_node cpuhp_online; | |
193 | #else | |
2001023e MD |
194 | struct notifier_block nb; |
195 | int hp_enable; | |
1e367326 | 196 | #endif |
2001023e MD |
197 | struct perf_event_attr *attr; |
198 | struct perf_event **e; /* per-cpu array */ | |
199 | }; | |
200 | ||
79150a49 JD |
201 | struct lttng_probe_ctx { |
202 | struct lttng_event *event; | |
203 | uint8_t interruptible; | |
204 | }; | |
205 | ||
ba1f5986 | 206 | struct lttng_ctx_field { |
8070f5c0 | 207 | struct lttng_event_field event_field; |
f1676205 MD |
208 | size_t (*get_size)(size_t offset); |
209 | void (*record)(struct lttng_ctx_field *field, | |
210 | struct lib_ring_buffer_ctx *ctx, | |
a90917c3 | 211 | struct lttng_channel *chan); |
07dfc1d0 | 212 | void (*get_value)(struct lttng_ctx_field *field, |
79150a49 | 213 | struct lttng_probe_ctx *lttng_probe_ctx, |
07dfc1d0 | 214 | union lttng_ctx_value *value); |
ba1f5986 | 215 | union { |
2001023e | 216 | struct lttng_perf_counter_field *perf_counter; |
ba1f5986 | 217 | } u; |
2dccf128 | 218 | void (*destroy)(struct lttng_ctx_field *field); |
ba1f5986 MD |
219 | }; |
220 | ||
221 | struct lttng_ctx { | |
833ad6a0 | 222 | struct lttng_ctx_field *fields; |
0d1a681e | 223 | unsigned int nr_fields; |
ba1f5986 | 224 | unsigned int allocated_fields; |
a9dd15da | 225 | size_t largest_align; /* in bytes */ |
0d1a681e MD |
226 | }; |
227 | ||
228 | struct lttng_event_desc { | |
a26a7e4f MD |
229 | const char *name; /* lttng-modules name */ |
230 | const char *kname; /* Linux kernel name (tracepoints) */ | |
c0edae1d | 231 | void *probe_callback; |
0d1a681e MD |
232 | const struct lttng_event_ctx *ctx; /* context */ |
233 | const struct lttng_event_field *fields; /* event payload */ | |
c0edae1d | 234 | unsigned int nr_fields; |
dc7f600a | 235 | struct module *owner; |
c0edae1d MD |
236 | }; |
237 | ||
85a9ca7f | 238 | struct lttng_probe_desc { |
3c997079 | 239 | const char *provider; |
f7bdf4db | 240 | const struct lttng_event_desc **event_desc; |
85a9ca7f MD |
241 | unsigned int nr_events; |
242 | struct list_head head; /* chain registered probes */ | |
3c997079 MD |
243 | struct list_head lazy_init_head; |
244 | int lazy; /* lazy registration */ | |
85a9ca7f MD |
245 | }; |
246 | ||
7371f44c MD |
247 | struct lttng_krp; /* Kretprobe handling */ |
248 | ||
3c997079 MD |
249 | enum lttng_event_type { |
250 | LTTNG_TYPE_EVENT = 0, | |
251 | LTTNG_TYPE_ENABLER = 1, | |
252 | }; | |
253 | ||
07dfc1d0 MD |
254 | struct lttng_filter_bytecode_node { |
255 | struct list_head node; | |
256 | struct lttng_enabler *enabler; | |
257 | /* | |
258 | * struct lttng_kernel_filter_bytecode has var. sized array, must be | |
259 | * last field. | |
260 | */ | |
261 | struct lttng_kernel_filter_bytecode bc; | |
262 | }; | |
263 | ||
264 | /* | |
265 | * Filter return value masks. | |
266 | */ | |
267 | enum lttng_filter_ret { | |
268 | LTTNG_FILTER_DISCARD = 0, | |
269 | LTTNG_FILTER_RECORD_FLAG = (1ULL << 0), | |
270 | /* Other bits are kept for future use. */ | |
271 | }; | |
272 | ||
273 | struct lttng_bytecode_runtime { | |
274 | /* Associated bytecode */ | |
275 | struct lttng_filter_bytecode_node *bc; | |
79150a49 JD |
276 | uint64_t (*filter)(void *filter_data, struct lttng_probe_ctx *lttng_probe_ctx, |
277 | const char *filter_stack_data); | |
07dfc1d0 MD |
278 | int link_failed; |
279 | struct list_head node; /* list of bytecode runtime in event */ | |
3834b99f | 280 | struct lttng_event *event; |
07dfc1d0 MD |
281 | }; |
282 | ||
3c997079 MD |
283 | /* |
284 | * Objects in a linked-list of enablers, owned by an event. | |
285 | */ | |
286 | struct lttng_enabler_ref { | |
287 | struct list_head node; /* enabler ref list */ | |
288 | struct lttng_enabler *ref; /* backward ref */ | |
289 | }; | |
290 | ||
85a9ca7f | 291 | /* |
a90917c3 | 292 | * lttng_event structure is referred to by the tracing fast path. It must be |
85a9ca7f MD |
293 | * kept small. |
294 | */ | |
a90917c3 | 295 | struct lttng_event { |
3c997079 | 296 | enum lttng_event_type evtype; /* First field. */ |
85a9ca7f | 297 | unsigned int id; |
a90917c3 | 298 | struct lttng_channel *chan; |
e64957da | 299 | int enabled; |
d3dbe23c | 300 | const struct lttng_event_desc *desc; |
85a9ca7f | 301 | void *filter; |
f1676205 | 302 | struct lttng_ctx *ctx; |
38d024ae | 303 | enum lttng_kernel_instrumentation instrumentation; |
d6d808f3 MD |
304 | union { |
305 | struct { | |
306 | struct kprobe kp; | |
307 | char *symbol_name; | |
308 | } kprobe; | |
7371f44c MD |
309 | struct { |
310 | struct lttng_krp *lttng_krp; | |
311 | char *symbol_name; | |
312 | } kretprobe; | |
e0a7a7c4 MD |
313 | struct { |
314 | char *symbol_name; | |
315 | } ftrace; | |
d6d808f3 | 316 | } u; |
3c997079 | 317 | struct list_head list; /* Event list in session */ |
9cccf98a | 318 | unsigned int metadata_dumped:1; |
3c997079 MD |
319 | |
320 | /* Backward references: list of lttng_enabler_ref (ref to enablers) */ | |
321 | struct list_head enablers_ref_head; | |
322 | struct hlist_node hlist; /* session ht of events */ | |
323 | int registered; /* has reg'd tracepoint probe */ | |
07dfc1d0 MD |
324 | /* list of struct lttng_bytecode_runtime, sorted by seqnum */ |
325 | struct list_head bytecode_runtime_head; | |
326 | int has_enablers_without_bytecode; | |
3c997079 MD |
327 | }; |
328 | ||
329 | enum lttng_enabler_type { | |
4993071a | 330 | LTTNG_ENABLER_STAR_GLOB, |
3c997079 MD |
331 | LTTNG_ENABLER_NAME, |
332 | }; | |
333 | ||
334 | /* | |
335 | * Enabler field, within whatever object is enabling an event. Target of | |
336 | * backward reference. | |
337 | */ | |
338 | struct lttng_enabler { | |
339 | enum lttng_event_type evtype; /* First field. */ | |
340 | ||
341 | enum lttng_enabler_type type; | |
342 | ||
343 | struct list_head node; /* per-session list of enablers */ | |
07dfc1d0 MD |
344 | /* head list of struct lttng_ust_filter_bytecode_node */ |
345 | struct list_head filter_bytecode_head; | |
3c997079 MD |
346 | |
347 | struct lttng_kernel_event event_param; | |
348 | struct lttng_channel *chan; | |
349 | struct lttng_ctx *ctx; | |
350 | unsigned int enabled:1; | |
85a9ca7f MD |
351 | }; |
352 | ||
a90917c3 | 353 | struct lttng_channel_ops { |
85a9ca7f | 354 | struct channel *(*channel_create)(const char *name, |
a90917c3 | 355 | struct lttng_channel *lttng_chan, |
85a9ca7f MD |
356 | void *buf_addr, |
357 | size_t subbuf_size, size_t num_subbuf, | |
358 | unsigned int switch_timer_interval, | |
359 | unsigned int read_timer_interval); | |
360 | void (*channel_destroy)(struct channel *chan); | |
361 | struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan); | |
f71ecafa | 362 | int (*buffer_has_read_closed_stream)(struct channel *chan); |
85a9ca7f | 363 | void (*buffer_read_close)(struct lib_ring_buffer *buf); |
4e1f08f4 | 364 | int (*event_reserve)(struct lib_ring_buffer_ctx *ctx, |
64c796d8 | 365 | uint32_t event_id); |
85a9ca7f MD |
366 | void (*event_commit)(struct lib_ring_buffer_ctx *ctx); |
367 | void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src, | |
368 | size_t len); | |
4ea00e4f JD |
369 | void (*event_write_from_user)(struct lib_ring_buffer_ctx *ctx, |
370 | const void *src, size_t len); | |
58aa5d24 MD |
371 | void (*event_memset)(struct lib_ring_buffer_ctx *ctx, |
372 | int c, size_t len); | |
16f78f3a MD |
373 | void (*event_strcpy)(struct lib_ring_buffer_ctx *ctx, const char *src, |
374 | size_t len); | |
375 | void (*event_strcpy_from_user)(struct lib_ring_buffer_ctx *ctx, | |
376 | const char __user *src, size_t len); | |
1ec3f75a MD |
377 | /* |
378 | * packet_avail_size returns the available size in the current | |
379 | * packet. Note that the size returned is only a hint, since it | |
380 | * may change due to concurrent writes. | |
381 | */ | |
382 | size_t (*packet_avail_size)(struct channel *chan); | |
71c1d843 | 383 | wait_queue_head_t *(*get_writer_buf_wait_queue)(struct channel *chan, int cpu); |
24cedcfe MD |
384 | wait_queue_head_t *(*get_hp_wait_queue)(struct channel *chan); |
385 | int (*is_finalized)(struct channel *chan); | |
254ec7bc | 386 | int (*is_disabled)(struct channel *chan); |
3b731ab1 JD |
387 | int (*timestamp_begin) (const struct lib_ring_buffer_config *config, |
388 | struct lib_ring_buffer *bufb, | |
389 | uint64_t *timestamp_begin); | |
390 | int (*timestamp_end) (const struct lib_ring_buffer_config *config, | |
391 | struct lib_ring_buffer *bufb, | |
392 | uint64_t *timestamp_end); | |
393 | int (*events_discarded) (const struct lib_ring_buffer_config *config, | |
394 | struct lib_ring_buffer *bufb, | |
395 | uint64_t *events_discarded); | |
396 | int (*content_size) (const struct lib_ring_buffer_config *config, | |
397 | struct lib_ring_buffer *bufb, | |
398 | uint64_t *content_size); | |
399 | int (*packet_size) (const struct lib_ring_buffer_config *config, | |
400 | struct lib_ring_buffer *bufb, | |
401 | uint64_t *packet_size); | |
402 | int (*stream_id) (const struct lib_ring_buffer_config *config, | |
403 | struct lib_ring_buffer *bufb, | |
404 | uint64_t *stream_id); | |
2348ca17 JD |
405 | int (*current_timestamp) (const struct lib_ring_buffer_config *config, |
406 | struct lib_ring_buffer *bufb, | |
407 | uint64_t *ts); | |
5b3cf4f9 JD |
408 | int (*sequence_number) (const struct lib_ring_buffer_config *config, |
409 | struct lib_ring_buffer *bufb, | |
410 | uint64_t *seq); | |
5594698f JD |
411 | int (*instance_id) (const struct lib_ring_buffer_config *config, |
412 | struct lib_ring_buffer *bufb, | |
413 | uint64_t *id); | |
85a9ca7f MD |
414 | }; |
415 | ||
a90917c3 | 416 | struct lttng_transport { |
a33c9927 MD |
417 | char *name; |
418 | struct module *owner; | |
419 | struct list_head node; | |
a90917c3 | 420 | struct lttng_channel_ops ops; |
a33c9927 MD |
421 | }; |
422 | ||
80f87dd2 MD |
423 | struct lttng_syscall_filter; |
424 | ||
3c997079 MD |
425 | #define LTTNG_EVENT_HT_BITS 12 |
426 | #define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS) | |
427 | ||
428 | struct lttng_event_ht { | |
429 | struct hlist_head table[LTTNG_EVENT_HT_SIZE]; | |
430 | }; | |
431 | ||
a90917c3 | 432 | struct lttng_channel { |
c099397a | 433 | unsigned int id; |
85a9ca7f | 434 | struct channel *chan; /* Channel buffers */ |
e64957da | 435 | int enabled; |
f1676205 | 436 | struct lttng_ctx *ctx; |
85a9ca7f | 437 | /* Event ID management */ |
a90917c3 | 438 | struct lttng_session *session; |
85a9ca7f MD |
439 | struct file *file; /* File associated to channel */ |
440 | unsigned int free_event_id; /* Next event ID to allocate */ | |
441 | struct list_head list; /* Channel list */ | |
a90917c3 MD |
442 | struct lttng_channel_ops *ops; |
443 | struct lttng_transport *transport; | |
444 | struct lttng_event **sc_table; /* for syscall tracing */ | |
445 | struct lttng_event **compat_sc_table; | |
5b7ac358 MD |
446 | struct lttng_event **sc_exit_table; /* for syscall exit tracing */ |
447 | struct lttng_event **compat_sc_exit_table; | |
a90917c3 MD |
448 | struct lttng_event *sc_unknown; /* for unknown syscalls */ |
449 | struct lttng_event *sc_compat_unknown; | |
5b7ac358 MD |
450 | struct lttng_event *sc_exit_unknown; |
451 | struct lttng_event *compat_sc_exit_unknown; | |
80f87dd2 | 452 | struct lttng_syscall_filter *sc_filter; |
9115fbdc | 453 | int header_type; /* 0: unset, 1: compact, 2: large */ |
d83004aa | 454 | enum channel_type channel_type; |
80f87dd2 MD |
455 | unsigned int metadata_dumped:1, |
456 | sys_enter_registered:1, | |
457 | sys_exit_registered:1, | |
3c997079 MD |
458 | syscall_all:1, |
459 | tstate:1; /* Transient enable state */ | |
85a9ca7f MD |
460 | }; |
461 | ||
d83004aa JD |
462 | struct lttng_metadata_stream { |
463 | void *priv; /* Ring buffer private data */ | |
464 | struct lttng_metadata_cache *metadata_cache; | |
f613e3e6 MD |
465 | unsigned int metadata_in; /* Bytes read from the cache */ |
466 | unsigned int metadata_out; /* Bytes consumed from stream */ | |
d83004aa JD |
467 | int finalized; /* Has channel been finalized */ |
468 | wait_queue_head_t read_wait; /* Reader buffer-level wait queue */ | |
469 | struct list_head list; /* Stream list */ | |
b3b8072b | 470 | struct lttng_transport *transport; |
9616f0bf | 471 | uint64_t version; /* Current version of the metadata cache */ |
d83004aa JD |
472 | }; |
473 | ||
114667d5 MD |
474 | #define LTTNG_DYNAMIC_LEN_STACK_SIZE 128 |
475 | ||
476 | struct lttng_dynamic_len_stack { | |
477 | size_t stack[LTTNG_DYNAMIC_LEN_STACK_SIZE]; | |
478 | size_t offset; | |
479 | }; | |
480 | ||
481 | DECLARE_PER_CPU(struct lttng_dynamic_len_stack, lttng_dynamic_len_stack); | |
e0130fab MD |
482 | |
483 | /* | |
484 | * struct lttng_pid_tracker declared in header due to deferencing of *v | |
485 | * in RCU_INITIALIZER(v). | |
486 | */ | |
487 | #define LTTNG_PID_HASH_BITS 6 | |
488 | #define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS) | |
489 | ||
490 | struct lttng_pid_tracker { | |
491 | struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE]; | |
492 | }; | |
493 | ||
7e6f9ef6 MD |
494 | struct lttng_pid_hash_node { |
495 | struct hlist_node hlist; | |
496 | int pid; | |
497 | }; | |
498 | ||
a90917c3 | 499 | struct lttng_session { |
85a9ca7f | 500 | int active; /* Is trace session active ? */ |
8070f5c0 | 501 | int been_active; /* Has trace session been active ? */ |
85a9ca7f MD |
502 | struct file *file; /* File associated to session */ |
503 | struct list_head chan; /* Channel list head */ | |
504 | struct list_head events; /* Event list head */ | |
505 | struct list_head list; /* Session list */ | |
c099397a | 506 | unsigned int free_chan_id; /* Next chan ID to allocate */ |
d793d5e1 | 507 | uuid_le uuid; /* Trace session unique ID */ |
d83004aa | 508 | struct lttng_metadata_cache *metadata_cache; |
e0130fab | 509 | struct lttng_pid_tracker *pid_tracker; |
3c997079 MD |
510 | unsigned int metadata_dumped:1, |
511 | tstate:1; /* Transient enable state */ | |
512 | /* List of enablers */ | |
513 | struct list_head enablers_head; | |
514 | /* Hash table of events */ | |
515 | struct lttng_event_ht events_ht; | |
85a9ca7f MD |
516 | }; |
517 | ||
d83004aa JD |
518 | struct lttng_metadata_cache { |
519 | char *data; /* Metadata cache */ | |
520 | unsigned int cache_alloc; /* Metadata allocated size (bytes) */ | |
521 | unsigned int metadata_written; /* Number of bytes written in metadata cache */ | |
522 | struct kref refcount; /* Metadata cache usage */ | |
523 | struct list_head metadata_stream; /* Metadata stream list */ | |
a36580d5 | 524 | uuid_le uuid; /* Trace session unique ID (copy) */ |
9616f0bf JD |
525 | struct mutex lock; /* Produce/consume lock */ |
526 | uint64_t version; /* Current version of the metadata */ | |
d83004aa JD |
527 | }; |
528 | ||
3c997079 MD |
529 | void lttng_lock_sessions(void); |
530 | void lttng_unlock_sessions(void); | |
531 | ||
532 | struct list_head *lttng_get_probe_list_head(void); | |
533 | ||
534 | struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type, | |
535 | struct lttng_kernel_event *event_param, | |
536 | struct lttng_channel *chan); | |
537 | ||
538 | int lttng_enabler_enable(struct lttng_enabler *enabler); | |
539 | int lttng_enabler_disable(struct lttng_enabler *enabler); | |
540 | int lttng_fix_pending_events(void); | |
541 | int lttng_session_active(void); | |
542 | ||
a90917c3 MD |
543 | struct lttng_session *lttng_session_create(void); |
544 | int lttng_session_enable(struct lttng_session *session); | |
545 | int lttng_session_disable(struct lttng_session *session); | |
546 | void lttng_session_destroy(struct lttng_session *session); | |
9616f0bf | 547 | int lttng_session_metadata_regenerate(struct lttng_session *session); |
601252cf | 548 | int lttng_session_statedump(struct lttng_session *session); |
d83004aa | 549 | void metadata_cache_destroy(struct kref *kref); |
4e3c1b9b | 550 | |
a90917c3 | 551 | struct lttng_channel *lttng_channel_create(struct lttng_session *session, |
5dbbdb43 MD |
552 | const char *transport_name, |
553 | void *buf_addr, | |
554 | size_t subbuf_size, size_t num_subbuf, | |
555 | unsigned int switch_timer_interval, | |
d83004aa JD |
556 | unsigned int read_timer_interval, |
557 | enum channel_type channel_type); | |
a90917c3 | 558 | struct lttng_channel *lttng_global_channel_create(struct lttng_session *session, |
4e3c1b9b MD |
559 | int overwrite, void *buf_addr, |
560 | size_t subbuf_size, size_t num_subbuf, | |
561 | unsigned int switch_timer_interval, | |
562 | unsigned int read_timer_interval); | |
4e3c1b9b | 563 | |
d83004aa | 564 | void lttng_metadata_channel_destroy(struct lttng_channel *chan); |
a90917c3 | 565 | struct lttng_event *lttng_event_create(struct lttng_channel *chan, |
3c997079 MD |
566 | struct lttng_kernel_event *event_param, |
567 | void *filter, | |
568 | const struct lttng_event_desc *event_desc, | |
569 | enum lttng_kernel_instrumentation itype); | |
33a39a3c MD |
570 | struct lttng_event *_lttng_event_create(struct lttng_channel *chan, |
571 | struct lttng_kernel_event *event_param, | |
572 | void *filter, | |
573 | const struct lttng_event_desc *event_desc, | |
574 | enum lttng_kernel_instrumentation itype); | |
6dccd6c1 JD |
575 | struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan, |
576 | struct lttng_kernel_old_event *old_event_param, | |
577 | void *filter, | |
578 | const struct lttng_event_desc *internal_desc); | |
c0e31d2e | 579 | |
a90917c3 MD |
580 | int lttng_channel_enable(struct lttng_channel *channel); |
581 | int lttng_channel_disable(struct lttng_channel *channel); | |
582 | int lttng_event_enable(struct lttng_event *event); | |
583 | int lttng_event_disable(struct lttng_event *event); | |
e64957da | 584 | |
a90917c3 MD |
585 | void lttng_transport_register(struct lttng_transport *transport); |
586 | void lttng_transport_unregister(struct lttng_transport *transport); | |
11b5a3c2 | 587 | |
360f38ea | 588 | void synchronize_trace(void); |
80996790 | 589 | int lttng_abi_init(void); |
6dccd6c1 | 590 | int lttng_abi_compat_old_init(void); |
80996790 | 591 | void lttng_abi_exit(void); |
6dccd6c1 | 592 | void lttng_abi_compat_old_exit(void); |
1c25284c | 593 | |
a90917c3 MD |
594 | int lttng_probe_register(struct lttng_probe_desc *desc); |
595 | void lttng_probe_unregister(struct lttng_probe_desc *desc); | |
596 | const struct lttng_event_desc *lttng_event_get(const char *name); | |
597 | void lttng_event_put(const struct lttng_event_desc *desc); | |
598 | int lttng_probes_init(void); | |
599 | void lttng_probes_exit(void); | |
1ec65de1 | 600 | |
b3b8072b MD |
601 | int lttng_metadata_output_channel(struct lttng_metadata_stream *stream, |
602 | struct channel *chan); | |
d83004aa | 603 | |
7e6f9ef6 | 604 | int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node); |
e0130fab MD |
605 | struct lttng_pid_tracker *lttng_pid_tracker_create(void); |
606 | void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf); | |
607 | bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid); | |
608 | int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid); | |
609 | int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid); | |
610 | ||
611 | int lttng_session_track_pid(struct lttng_session *session, int pid); | |
612 | int lttng_session_untrack_pid(struct lttng_session *session, int pid); | |
613 | ||
7e6f9ef6 MD |
614 | int lttng_session_list_tracker_pids(struct lttng_session *session); |
615 | ||
2754583e MD |
616 | void lttng_clock_ref(void); |
617 | void lttng_clock_unref(void); | |
618 | ||
3a523f5b | 619 | #if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS) |
a90917c3 MD |
620 | int lttng_syscalls_register(struct lttng_channel *chan, void *filter); |
621 | int lttng_syscalls_unregister(struct lttng_channel *chan); | |
80f87dd2 MD |
622 | int lttng_syscall_filter_enable(struct lttng_channel *chan, |
623 | const char *name); | |
624 | int lttng_syscall_filter_disable(struct lttng_channel *chan, | |
625 | const char *name); | |
12e579db MD |
626 | long lttng_channel_syscall_mask(struct lttng_channel *channel, |
627 | struct lttng_kernel_syscall_mask __user *usyscall_mask); | |
1ec65de1 | 628 | #else |
a90917c3 | 629 | static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter) |
1ec65de1 MD |
630 | { |
631 | return -ENOSYS; | |
632 | } | |
633 | ||
a90917c3 | 634 | static inline int lttng_syscalls_unregister(struct lttng_channel *chan) |
1ec65de1 MD |
635 | { |
636 | return 0; | |
637 | } | |
80f87dd2 | 638 | |
f127e61e | 639 | static inline int lttng_syscall_filter_enable(struct lttng_channel *chan, |
80f87dd2 MD |
640 | const char *name) |
641 | { | |
642 | return -ENOSYS; | |
643 | } | |
644 | ||
f127e61e | 645 | static inline int lttng_syscall_filter_disable(struct lttng_channel *chan, |
80f87dd2 MD |
646 | const char *name) |
647 | { | |
648 | return -ENOSYS; | |
649 | } | |
12e579db | 650 | |
f127e61e | 651 | static inline long lttng_channel_syscall_mask(struct lttng_channel *channel, |
12e579db MD |
652 | struct lttng_kernel_syscall_mask __user *usyscall_mask) |
653 | { | |
654 | return -ENOSYS; | |
655 | } | |
1ec65de1 MD |
656 | #endif |
657 | ||
07dfc1d0 MD |
658 | void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime); |
659 | int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler, | |
660 | struct lttng_kernel_filter_bytecode __user *bytecode); | |
f127e61e MD |
661 | void lttng_enabler_event_link_bytecode(struct lttng_event *event, |
662 | struct lttng_enabler *enabler); | |
07dfc1d0 | 663 | |
114667d5 MD |
664 | int lttng_probes_init(void); |
665 | ||
07dfc1d0 MD |
666 | extern struct lttng_ctx *lttng_static_ctx; |
667 | ||
668 | int lttng_context_init(void); | |
669 | void lttng_context_exit(void); | |
2dccf128 | 670 | struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx); |
a9dd15da | 671 | void lttng_context_update(struct lttng_ctx *ctx); |
44252f0f | 672 | int lttng_find_context(struct lttng_ctx *ctx, const char *name); |
07dfc1d0 | 673 | int lttng_get_context_index(struct lttng_ctx *ctx, const char *name); |
8289661d MD |
674 | void lttng_remove_context_field(struct lttng_ctx **ctx, |
675 | struct lttng_ctx_field *field); | |
2dccf128 | 676 | void lttng_destroy_context(struct lttng_ctx *ctx); |
8070f5c0 | 677 | int lttng_add_pid_to_ctx(struct lttng_ctx **ctx); |
b3699d90 | 678 | int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx); |
a2563e83 | 679 | int lttng_add_procname_to_ctx(struct lttng_ctx **ctx); |
a8ad3613 | 680 | int lttng_add_prio_to_ctx(struct lttng_ctx **ctx); |
53f1f0ca | 681 | int lttng_add_nice_to_ctx(struct lttng_ctx **ctx); |
b64bc438 MD |
682 | int lttng_add_vpid_to_ctx(struct lttng_ctx **ctx); |
683 | int lttng_add_tid_to_ctx(struct lttng_ctx **ctx); | |
684 | int lttng_add_vtid_to_ctx(struct lttng_ctx **ctx); | |
685 | int lttng_add_ppid_to_ctx(struct lttng_ctx **ctx); | |
686 | int lttng_add_vppid_to_ctx(struct lttng_ctx **ctx); | |
975da2c0 | 687 | int lttng_add_hostname_to_ctx(struct lttng_ctx **ctx); |
79150a49 JD |
688 | int lttng_add_interruptible_to_ctx(struct lttng_ctx **ctx); |
689 | int lttng_add_need_reschedule_to_ctx(struct lttng_ctx **ctx); | |
690 | #if defined(CONFIG_PREEMPT_RT_FULL) || defined(CONFIG_PREEMPT) | |
691 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx); | |
692 | #else | |
693 | static inline | |
694 | int lttng_add_preemptible_to_ctx(struct lttng_ctx **ctx) | |
695 | { | |
696 | return -ENOSYS; | |
697 | } | |
698 | #endif | |
699 | #ifdef CONFIG_PREEMPT_RT_FULL | |
700 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx); | |
701 | #else | |
702 | static inline | |
703 | int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx) | |
704 | { | |
705 | return -ENOSYS; | |
706 | } | |
707 | #endif | |
41c3c24e | 708 | #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33)) |
c24a0d71 MD |
709 | int lttng_add_perf_counter_to_ctx(uint32_t type, |
710 | uint64_t config, | |
711 | const char *name, | |
712 | struct lttng_ctx **ctx); | |
1e367326 MD |
713 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, |
714 | struct lttng_cpuhp_node *node); | |
715 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, | |
716 | struct lttng_cpuhp_node *node); | |
1d443b34 MD |
717 | #else |
718 | static inline | |
719 | int lttng_add_perf_counter_to_ctx(uint32_t type, | |
720 | uint64_t config, | |
721 | const char *name, | |
722 | struct lttng_ctx **ctx) | |
723 | { | |
724 | return -ENOSYS; | |
725 | } | |
1e367326 MD |
726 | static inline |
727 | int lttng_cpuhp_perf_counter_online(unsigned int cpu, | |
728 | struct lttng_cpuhp_node *node) | |
729 | { | |
730 | return 0; | |
731 | } | |
732 | static inline | |
733 | int lttng_cpuhp_perf_counter_dead(unsigned int cpu, | |
734 | struct lttng_cpuhp_node *node) | |
735 | { | |
736 | return 0; | |
737 | } | |
1d443b34 | 738 | #endif |
02119ee5 | 739 | |
0c956676 MD |
740 | int lttng_logger_init(void); |
741 | void lttng_logger_exit(void); | |
742 | ||
c337ddc2 MD |
743 | extern int lttng_statedump_start(struct lttng_session *session); |
744 | ||
acd614cc | 745 | #ifdef CONFIG_KPROBES |
f17701fb MD |
746 | int lttng_kprobes_register(const char *name, |
747 | const char *symbol_name, | |
748 | uint64_t offset, | |
749 | uint64_t addr, | |
a90917c3 MD |
750 | struct lttng_event *event); |
751 | void lttng_kprobes_unregister(struct lttng_event *event); | |
752 | void lttng_kprobes_destroy_private(struct lttng_event *event); | |
acd614cc MD |
753 | #else |
754 | static inline | |
755 | int lttng_kprobes_register(const char *name, | |
756 | const char *symbol_name, | |
757 | uint64_t offset, | |
758 | uint64_t addr, | |
a90917c3 | 759 | struct lttng_event *event) |
acd614cc MD |
760 | { |
761 | return -ENOSYS; | |
762 | } | |
763 | ||
25f53c39 | 764 | static inline |
a90917c3 | 765 | void lttng_kprobes_unregister(struct lttng_event *event) |
acd614cc MD |
766 | { |
767 | } | |
edeb3137 MD |
768 | |
769 | static inline | |
a90917c3 | 770 | void lttng_kprobes_destroy_private(struct lttng_event *event) |
edeb3137 MD |
771 | { |
772 | } | |
acd614cc | 773 | #endif |
d6d808f3 | 774 | |
7371f44c MD |
775 | #ifdef CONFIG_KRETPROBES |
776 | int lttng_kretprobes_register(const char *name, | |
777 | const char *symbol_name, | |
778 | uint64_t offset, | |
779 | uint64_t addr, | |
a90917c3 MD |
780 | struct lttng_event *event_entry, |
781 | struct lttng_event *event_exit); | |
782 | void lttng_kretprobes_unregister(struct lttng_event *event); | |
783 | void lttng_kretprobes_destroy_private(struct lttng_event *event); | |
a0493bef MD |
784 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, |
785 | int enable); | |
7371f44c MD |
786 | #else |
787 | static inline | |
788 | int lttng_kretprobes_register(const char *name, | |
789 | const char *symbol_name, | |
790 | uint64_t offset, | |
791 | uint64_t addr, | |
a90917c3 MD |
792 | struct lttng_event *event_entry, |
793 | struct lttng_event *event_exit) | |
7371f44c MD |
794 | { |
795 | return -ENOSYS; | |
796 | } | |
797 | ||
798 | static inline | |
a90917c3 | 799 | void lttng_kretprobes_unregister(struct lttng_event *event) |
7371f44c MD |
800 | { |
801 | } | |
802 | ||
803 | static inline | |
a90917c3 | 804 | void lttng_kretprobes_destroy_private(struct lttng_event *event) |
7371f44c MD |
805 | { |
806 | } | |
a0493bef MD |
807 | |
808 | static inline | |
809 | int lttng_kretprobes_event_enable_state(struct lttng_event *event, | |
810 | int enable) | |
811 | { | |
812 | return -ENOSYS; | |
813 | } | |
7371f44c MD |
814 | #endif |
815 | ||
f61d99f9 | 816 | #if defined(CONFIG_DYNAMIC_FTRACE) && !defined(LTTNG_FTRACE_MISSING_HEADER) |
e0a7a7c4 MD |
817 | int lttng_ftrace_register(const char *name, |
818 | const char *symbol_name, | |
a90917c3 MD |
819 | struct lttng_event *event); |
820 | void lttng_ftrace_unregister(struct lttng_event *event); | |
821 | void lttng_ftrace_destroy_private(struct lttng_event *event); | |
e0a7a7c4 MD |
822 | #else |
823 | static inline | |
824 | int lttng_ftrace_register(const char *name, | |
825 | const char *symbol_name, | |
a90917c3 | 826 | struct lttng_event *event) |
e0a7a7c4 | 827 | { |
acd614cc | 828 | return -ENOSYS; |
e0a7a7c4 MD |
829 | } |
830 | ||
831 | static inline | |
a90917c3 | 832 | void lttng_ftrace_unregister(struct lttng_event *event) |
e0a7a7c4 MD |
833 | { |
834 | } | |
edeb3137 MD |
835 | |
836 | static inline | |
a90917c3 | 837 | void lttng_ftrace_destroy_private(struct lttng_event *event) |
edeb3137 MD |
838 | { |
839 | } | |
e0a7a7c4 | 840 | #endif |
271b6681 | 841 | |
3db41b2c | 842 | int lttng_calibrate(struct lttng_kernel_calibrate *calibrate); |
57105fc2 | 843 | |
271b6681 | 844 | extern const struct file_operations lttng_tracepoint_list_fops; |
2d2464bd | 845 | extern const struct file_operations lttng_syscall_list_fops; |
271b6681 | 846 | |
ef200626 MD |
847 | #if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35)) |
848 | #define TRACEPOINT_HAS_DATA_ARG | |
849 | #endif | |
850 | ||
a90917c3 | 851 | #endif /* _LTTNG_EVENTS_H */ |