Commit | Line | Data |
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f3105c67 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3105c67 | 4 | * |
e92f3e28 MD |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; version 2 of the License only. | |
f3105c67 MD |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
e92f3e28 MD |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
f3105c67 MD |
17 | */ |
18 | ||
19 | #ifndef _LTTNG_UST_CTL_H | |
20 | #define _LTTNG_UST_CTL_H | |
21 | ||
fb31eb73 | 22 | #include <limits.h> |
b4051ad8 | 23 | #include <stddef.h> |
fb31eb73 | 24 | #include <stdint.h> |
32ce8569 | 25 | #include <sys/types.h> |
fb31eb73 FD |
26 | |
27 | #include <lttng/ust-abi.h> | |
74d81a6c | 28 | |
db56acaf MD |
29 | #ifndef LTTNG_PACKED |
30 | #error "LTTNG_PACKED should be defined" | |
31 | #endif | |
32 | ||
74d81a6c MD |
33 | #ifndef LTTNG_UST_UUID_LEN |
34 | #define LTTNG_UST_UUID_LEN 16 | |
35 | #endif | |
36 | ||
32ce8569 MD |
37 | /* Default unix socket path */ |
38 | #define LTTNG_UST_SOCK_FILENAME \ | |
39 | "lttng-ust-sock-" \ | |
40 | __ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION) | |
41 | ||
42 | /* | |
43 | * Shared memory files path are automatically related to shm root, e.g. | |
44 | * /dev/shm under linux. | |
45 | */ | |
46 | #define LTTNG_UST_WAIT_FILENAME \ | |
47 | "lttng-ust-wait-" \ | |
48 | __ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION) | |
49 | ||
74d81a6c MD |
50 | struct lttng_ust_shm_handle; |
51 | struct lttng_ust_lib_ring_buffer; | |
52 | ||
53 | struct ustctl_consumer_channel_attr { | |
54 | enum lttng_ust_chan_type type; | |
55 | uint64_t subbuf_size; /* bytes */ | |
56 | uint64_t num_subbuf; /* power of 2 */ | |
57 | int overwrite; /* 1: overwrite, 0: discard */ | |
58 | unsigned int switch_timer_interval; /* usec */ | |
59 | unsigned int read_timer_interval; /* usec */ | |
60 | enum lttng_ust_output output; /* splice, mmap */ | |
6ca18e66 | 61 | uint32_t chan_id; /* channel ID */ |
74d81a6c | 62 | unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */ |
b2c5f61a | 63 | int64_t blocking_timeout; /* Blocking timeout (usec) */ |
74d81a6c MD |
64 | } LTTNG_PACKED; |
65 | ||
66 | /* | |
67 | * API used by sessiond. | |
68 | */ | |
69 | ||
53f0df51 JG |
70 | struct lttng_ust_context_attr { |
71 | enum lttng_ust_context_type ctx; | |
72 | union { | |
73 | struct lttng_ust_perf_counter_ctx perf_counter; | |
74 | struct { | |
75 | char *provider_name; | |
76 | char *ctx_name; | |
77 | } app_ctx; | |
78 | } u; | |
79 | }; | |
80 | ||
7bc53e94 MD |
81 | /* |
82 | * Error values: all the following functions return: | |
c354a72c | 83 | * >= 0: Success (LTTNG_UST_OK) |
7bc53e94 MD |
84 | * < 0: error code. |
85 | */ | |
1c5e467e | 86 | int ustctl_register_done(int sock); |
f3105c67 | 87 | int ustctl_create_session(int sock); |
f3105c67 | 88 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
89 | struct lttng_ust_object_data *channel_data, |
90 | struct lttng_ust_object_data **event_data); | |
53f0df51 | 91 | int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx, |
61f02aea MD |
92 | struct lttng_ust_object_data *obj_data, |
93 | struct lttng_ust_object_data **context_data); | |
cd54f6d9 MD |
94 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
95 | struct lttng_ust_object_data *obj_data); | |
d37ecb3f FD |
96 | int ustctl_set_capture(int sock, struct lttng_ust_capture_bytecode *bytecode, |
97 | struct lttng_ust_object_data *obj_data); | |
da57c034 JI |
98 | int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion, |
99 | struct lttng_ust_object_data *obj_data); | |
f3105c67 | 100 | |
61f02aea MD |
101 | int ustctl_enable(int sock, struct lttng_ust_object_data *object); |
102 | int ustctl_disable(int sock, struct lttng_ust_object_data *object); | |
4a6ca058 MD |
103 | int ustctl_start_session(int sock, int handle); |
104 | int ustctl_stop_session(int sock, int handle); | |
f3105c67 | 105 | |
d8d2416d FD |
106 | /* |
107 | * ustctl_create_event notifier_group creates a event notifier group. It | |
108 | * establishes the connection with the application by providing a file | |
109 | * descriptor of the pipe to be used by the application when a event notifier | |
110 | * of that group is fired. It returns a handle to be used when creating event | |
111 | * notifier in that group. | |
112 | */ | |
113 | int ustctl_create_event_notifier_group(int sock, int pipe_fd, | |
114 | struct lttng_ust_object_data **event_notifier_group); | |
115 | ||
116 | /* | |
117 | * ustctl_create_event notifier creates a event notifier in a event notifier | |
118 | * group giving a event notifier description and a event notifier group handle. | |
119 | * It returns a event notifier handle to be used when enabling the event | |
120 | * notifier, attaching filter, attaching exclusion, and disabling the event | |
121 | * notifier. | |
122 | */ | |
123 | int ustctl_create_event_notifier(int sock, | |
124 | struct lttng_ust_event_notifier *event_notifier, | |
125 | struct lttng_ust_object_data *event_notifier_group, | |
126 | struct lttng_ust_object_data **event_notifier_data); | |
127 | ||
b115631f MD |
128 | /* |
129 | * ustctl_tracepoint_list returns a tracepoint list handle, or negative | |
130 | * error value. | |
131 | */ | |
132 | int ustctl_tracepoint_list(int sock); | |
74d81a6c | 133 | |
b115631f MD |
134 | /* |
135 | * ustctl_tracepoint_list_get is used to iterate on the tp list | |
7bc53e94 MD |
136 | * handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is |
137 | * returned. | |
b115631f MD |
138 | */ |
139 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 140 | struct lttng_ust_tracepoint_iter *iter); |
b115631f | 141 | |
40003310 MD |
142 | /* |
143 | * ustctl_tracepoint_field_list returns a tracepoint field list handle, | |
144 | * or negative error value. | |
145 | */ | |
146 | int ustctl_tracepoint_field_list(int sock); | |
147 | ||
148 | /* | |
149 | * ustctl_tracepoint_field_list_get is used to iterate on the tp field | |
7bc53e94 MD |
150 | * list handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is |
151 | * returned. | |
40003310 MD |
152 | */ |
153 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
154 | struct lttng_ust_field_iter *iter); | |
155 | ||
f3105c67 MD |
156 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v); |
157 | int ustctl_wait_quiescent(int sock); | |
158 | ||
f1fffc57 MD |
159 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object); |
160 | ||
f3105c67 MD |
161 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate); |
162 | ||
74d81a6c MD |
163 | /* Release object created by members of this API. */ |
164 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data); | |
165 | /* Release handle returned by create session. */ | |
166 | int ustctl_release_handle(int sock, int handle); | |
167 | ||
168 | int ustctl_recv_channel_from_consumer(int sock, | |
169 | struct lttng_ust_object_data **channel_data); | |
170 | int ustctl_recv_stream_from_consumer(int sock, | |
171 | struct lttng_ust_object_data **stream_data); | |
172 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
173 | struct lttng_ust_object_data *channel_data); | |
174 | int ustctl_send_stream_to_ust(int sock, | |
175 | struct lttng_ust_object_data *channel_data, | |
176 | struct lttng_ust_object_data *stream_data); | |
177 | ||
12f3dabc MD |
178 | /* |
179 | * ustctl_duplicate_ust_object_data allocated a new object in "dest" if | |
180 | * it succeeds (returns 0). It must be released using | |
181 | * ustctl_release_object() and then freed with free(). | |
182 | */ | |
183 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, | |
184 | struct lttng_ust_object_data *src); | |
185 | ||
f3105c67 | 186 | /* |
74d81a6c | 187 | * API used by consumer. |
f3105c67 | 188 | */ |
74d81a6c MD |
189 | |
190 | struct ustctl_consumer_channel; | |
191 | struct ustctl_consumer_stream; | |
192 | struct ustctl_consumer_channel_attr; | |
193 | ||
5ea386c3 MD |
194 | int ustctl_get_nr_stream_per_channel(void); |
195 | ||
74d81a6c | 196 | struct ustctl_consumer_channel * |
5ea386c3 MD |
197 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr, |
198 | const int *stream_fds, int nr_stream_fds); | |
5224b5c8 | 199 | /* |
74d81a6c MD |
200 | * Each stream created needs to be destroyed before calling |
201 | * ustctl_destroy_channel(). | |
5224b5c8 | 202 | */ |
74d81a6c | 203 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan); |
f3105c67 | 204 | |
74d81a6c MD |
205 | int ustctl_send_channel_to_sessiond(int sock, |
206 | struct ustctl_consumer_channel *channel); | |
ff0f5728 MD |
207 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan); |
208 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan); | |
209 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *consumer_chan); | |
210 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *consumer_chan); | |
c9023c93 MD |
211 | |
212 | int ustctl_write_metadata_to_channel( | |
213 | struct ustctl_consumer_channel *channel, | |
214 | const char *metadata_str, /* NOT null-terminated */ | |
215 | size_t len); /* metadata length */ | |
3ef94b0e JD |
216 | ssize_t ustctl_write_one_packet_to_channel( |
217 | struct ustctl_consumer_channel *channel, | |
218 | const char *metadata_str, /* NOT null-terminated */ | |
219 | size_t len); /* metadata length */ | |
c9023c93 | 220 | |
74d81a6c MD |
221 | /* |
222 | * Send a NULL stream to finish iteration over all streams of a given | |
223 | * channel. | |
224 | */ | |
225 | int ustctl_send_stream_to_sessiond(int sock, | |
226 | struct ustctl_consumer_stream *stream); | |
227 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream); | |
228 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream); | |
ff0f5728 MD |
229 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream); |
230 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream); | |
f3105c67 | 231 | |
74d81a6c MD |
232 | /* Create/destroy stream buffers for read */ |
233 | struct ustctl_consumer_stream * | |
234 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
235 | int cpu); | |
236 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream); | |
f3105c67 MD |
237 | |
238 | /* For mmap mode, readable without "get" operation */ | |
74d81a6c | 239 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
f3105c67 | 240 | unsigned long *len); |
74d81a6c | 241 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
f3105c67 MD |
242 | unsigned long *len); |
243 | ||
244 | /* | |
245 | * For mmap mode, operate on the current packet (between get/put or | |
246 | * get_next/put_next). | |
247 | */ | |
74d81a6c MD |
248 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream); |
249 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, | |
250 | unsigned long *off); | |
251 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, | |
252 | unsigned long *len); | |
253 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, | |
254 | unsigned long *len); | |
255 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream); | |
256 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream); | |
f3105c67 MD |
257 | |
258 | /* snapshot */ | |
259 | ||
74d81a6c | 260 | int ustctl_snapshot(struct ustctl_consumer_stream *stream); |
f45930b7 | 261 | int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream *stream); |
74d81a6c MD |
262 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, |
263 | unsigned long *pos); | |
264 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, | |
265 | unsigned long *pos); | |
266 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, | |
267 | unsigned long *pos); | |
268 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream); | |
5f9d3dbc | 269 | |
74d81a6c MD |
270 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
271 | int producer_active); | |
beca55a1 | 272 | void ustctl_clear_buffer(struct ustctl_consumer_stream *stream); |
f3105c67 | 273 | |
b2f3252a | 274 | /* index */ |
82df14e4 MD |
275 | |
276 | /* | |
277 | * Getters which need to be used on the current packet (between get/put | |
278 | * or get_next/put_next. | |
279 | */ | |
280 | ||
b2f3252a JD |
281 | int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream, |
282 | uint64_t *timestamp_begin); | |
283 | int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream, | |
284 | uint64_t *timestamp_end); | |
285 | int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream, | |
286 | uint64_t *events_discarded); | |
287 | int ustctl_get_content_size(struct ustctl_consumer_stream *stream, | |
288 | uint64_t *content_size); | |
289 | int ustctl_get_packet_size(struct ustctl_consumer_stream *stream, | |
290 | uint64_t *packet_size); | |
1ff31389 JD |
291 | int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream, |
292 | uint64_t *seq); | |
82df14e4 MD |
293 | |
294 | /* | |
295 | * Getter returning state invariant for the stream, which can be used | |
296 | * without "get" operation. | |
297 | */ | |
298 | ||
299 | int ustctl_get_stream_id(struct ustctl_consumer_stream *stream, | |
300 | uint64_t *stream_id); | |
45a00b05 JD |
301 | int ustctl_get_instance_id(struct ustctl_consumer_stream *stream, |
302 | uint64_t *id); | |
b2f3252a | 303 | |
82df14e4 MD |
304 | /* |
305 | * Getter returning the current timestamp as perceived from the | |
306 | * tracer. | |
307 | */ | |
308 | int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream, | |
309 | uint64_t *ts); | |
310 | ||
57201bb3 MD |
311 | /* returns whether UST has perf counters support. */ |
312 | int ustctl_has_perf_counters(void); | |
313 | ||
f53329f3 JD |
314 | /* Regenerate the statedump. */ |
315 | int ustctl_regenerate_statedump(int sock, int handle); | |
316 | ||
32ce8569 MD |
317 | /* event registry management */ |
318 | ||
319 | enum ustctl_socket_type { | |
320 | USTCTL_SOCKET_CMD = 0, | |
321 | USTCTL_SOCKET_NOTIFY = 1, | |
322 | }; | |
323 | ||
324 | enum ustctl_notify_cmd { | |
325 | USTCTL_NOTIFY_CMD_EVENT = 0, | |
326 | USTCTL_NOTIFY_CMD_CHANNEL = 1, | |
c785c634 | 327 | USTCTL_NOTIFY_CMD_ENUM = 2, |
32ce8569 MD |
328 | }; |
329 | ||
330 | enum ustctl_channel_header { | |
331 | USTCTL_CHANNEL_HEADER_UNKNOWN = 0, | |
332 | USTCTL_CHANNEL_HEADER_COMPACT = 1, | |
333 | USTCTL_CHANNEL_HEADER_LARGE = 2, | |
334 | }; | |
335 | ||
336 | /* event type structures */ | |
337 | ||
338 | enum ustctl_abstract_types { | |
339 | ustctl_atype_integer, | |
218deb69 MD |
340 | ustctl_atype_enum, /* legacy */ |
341 | ustctl_atype_array, /* legacy */ | |
342 | ustctl_atype_sequence, /* legacy */ | |
32ce8569 MD |
343 | ustctl_atype_string, |
344 | ustctl_atype_float, | |
218deb69 MD |
345 | ustctl_atype_variant, /* legacy */ |
346 | ustctl_atype_struct, /* legacy */ | |
347 | ustctl_atype_enum_nestable, | |
348 | ustctl_atype_array_nestable, | |
349 | ustctl_atype_sequence_nestable, | |
350 | ustctl_atype_struct_nestable, | |
351 | ustctl_atype_variant_nestable, | |
32ce8569 MD |
352 | NR_USTCTL_ABSTRACT_TYPES, |
353 | }; | |
354 | ||
355 | enum ustctl_string_encodings { | |
356 | ustctl_encode_none = 0, | |
357 | ustctl_encode_UTF8 = 1, | |
358 | ustctl_encode_ASCII = 2, | |
359 | NR_USTCTL_STRING_ENCODINGS, | |
360 | }; | |
361 | ||
362 | #define USTCTL_UST_INTEGER_TYPE_PADDING 24 | |
363 | struct ustctl_integer_type { | |
364 | uint32_t size; /* in bits */ | |
365 | uint32_t signedness; | |
366 | uint32_t reverse_byte_order; | |
367 | uint32_t base; /* 2, 8, 10, 16, for pretty print */ | |
735ea6a8 | 368 | int32_t encoding; /* enum ustctl_string_encodings */ |
32ce8569 MD |
369 | uint16_t alignment; /* in bits */ |
370 | char padding[USTCTL_UST_INTEGER_TYPE_PADDING]; | |
371 | } LTTNG_PACKED; | |
372 | ||
373 | #define USTCTL_UST_FLOAT_TYPE_PADDING 24 | |
374 | struct ustctl_float_type { | |
375 | uint32_t exp_dig; /* exponent digits, in bits */ | |
376 | uint32_t mant_dig; /* mantissa digits, in bits */ | |
377 | uint32_t reverse_byte_order; | |
378 | uint16_t alignment; /* in bits */ | |
379 | char padding[USTCTL_UST_FLOAT_TYPE_PADDING]; | |
380 | } LTTNG_PACKED; | |
381 | ||
a6f80644 MD |
382 | #define USTCTL_UST_ENUM_VALUE_PADDING 15 |
383 | struct ustctl_enum_value { | |
384 | uint64_t value; | |
385 | uint8_t signedness; | |
386 | char padding[USTCTL_UST_ENUM_VALUE_PADDING]; | |
387 | } LTTNG_PACKED; | |
388 | ||
3e762260 PP |
389 | enum ustctl_ust_enum_entry_options { |
390 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0, | |
391 | }; | |
392 | ||
c785c634 MD |
393 | #define USTCTL_UST_ENUM_ENTRY_PADDING 32 |
394 | struct ustctl_enum_entry { | |
a6f80644 | 395 | struct ustctl_enum_value start, end; /* start and end are inclusive */ |
c785c634 | 396 | char string[LTTNG_UST_SYM_NAME_LEN]; |
3e762260 PP |
397 | union { |
398 | struct { | |
399 | uint32_t options; | |
400 | } LTTNG_PACKED extra; | |
401 | char padding[USTCTL_UST_ENUM_ENTRY_PADDING]; | |
402 | } u; | |
a6f80644 | 403 | } LTTNG_PACKED; |
c785c634 | 404 | |
218deb69 | 405 | /* legacy */ |
32ce8569 MD |
406 | #define USTCTL_UST_BASIC_TYPE_PADDING 296 |
407 | union _ustctl_basic_type { | |
408 | struct ustctl_integer_type integer; | |
c785c634 MD |
409 | struct { |
410 | char name[LTTNG_UST_SYM_NAME_LEN]; | |
411 | struct ustctl_integer_type container_type; | |
412 | uint64_t id; /* enum ID in sessiond. */ | |
413 | } enumeration; | |
32ce8569 | 414 | struct { |
735ea6a8 | 415 | int32_t encoding; /* enum ustctl_string_encodings */ |
32ce8569 MD |
416 | } string; |
417 | struct ustctl_float_type _float; | |
418 | char padding[USTCTL_UST_BASIC_TYPE_PADDING]; | |
419 | } LTTNG_PACKED; | |
420 | ||
218deb69 | 421 | /* legacy */ |
32ce8569 MD |
422 | struct ustctl_basic_type { |
423 | enum ustctl_abstract_types atype; | |
424 | union { | |
425 | union _ustctl_basic_type basic; | |
426 | } u; | |
427 | } LTTNG_PACKED; | |
428 | ||
218deb69 MD |
429 | /* |
430 | * Padding is derived from largest member: u.legacy.sequence which | |
431 | * contains two basic types, each with USTCTL_UST_BASIC_TYPE_PADDING. | |
432 | */ | |
433 | #define USTCTL_UST_TYPE_PADDING (2 * USTCTL_UST_BASIC_TYPE_PADDING) | |
32ce8569 MD |
434 | struct ustctl_type { |
435 | enum ustctl_abstract_types atype; | |
436 | union { | |
218deb69 MD |
437 | struct ustctl_integer_type integer; |
438 | struct ustctl_float_type _float; | |
439 | struct { | |
440 | int32_t encoding; /* enum ustctl_string_encodings */ | |
441 | } string; | |
442 | struct { | |
443 | char name[LTTNG_UST_SYM_NAME_LEN]; | |
444 | uint64_t id; /* enum ID in sessiond. */ | |
445 | /* container_type follows after this struct ustctl_field. */ | |
446 | } enum_nestable; | |
32ce8569 | 447 | struct { |
32ce8569 | 448 | uint32_t length; /* num. elems. */ |
218deb69 MD |
449 | uint32_t alignment; |
450 | /* elem_type follows after this struct ustctl_field. */ | |
451 | } array_nestable; | |
32ce8569 | 452 | struct { |
218deb69 MD |
453 | char length_name[LTTNG_UST_SYM_NAME_LEN]; |
454 | uint32_t alignment; /* Alignment before elements. */ | |
455 | /* elem_type follows after the length_type. */ | |
456 | } sequence_nestable; | |
457 | struct { | |
458 | uint32_t nr_fields; | |
459 | uint32_t alignment; | |
460 | /* Followed by nr_fields struct ustctl_field. */ | |
461 | } struct_nestable; | |
53569322 MD |
462 | struct { |
463 | uint32_t nr_choices; | |
464 | char tag_name[LTTNG_UST_SYM_NAME_LEN]; | |
218deb69 | 465 | uint32_t alignment; |
53569322 | 466 | /* Followed by nr_choices struct ustctl_field. */ |
218deb69 MD |
467 | } variant_nestable; |
468 | ||
469 | /* Legacy ABI */ | |
470 | union { | |
471 | union _ustctl_basic_type basic; | |
472 | struct { | |
473 | struct ustctl_basic_type elem_type; | |
474 | uint32_t length; /* num. elems. */ | |
475 | } array; | |
476 | struct { | |
477 | struct ustctl_basic_type length_type; | |
478 | struct ustctl_basic_type elem_type; | |
479 | } sequence; | |
480 | struct { | |
481 | uint32_t nr_fields; | |
482 | /* Followed by nr_fields struct ustctl_field. */ | |
483 | } _struct; | |
484 | struct { | |
485 | uint32_t nr_choices; | |
486 | char tag_name[LTTNG_UST_SYM_NAME_LEN]; | |
487 | /* Followed by nr_choices struct ustctl_field. */ | |
488 | } variant; | |
489 | } legacy; | |
32ce8569 MD |
490 | char padding[USTCTL_UST_TYPE_PADDING]; |
491 | } u; | |
492 | } LTTNG_PACKED; | |
493 | ||
494 | #define USTCTL_UST_FIELD_PADDING 28 | |
495 | struct ustctl_field { | |
496 | char name[LTTNG_UST_SYM_NAME_LEN]; | |
497 | struct ustctl_type type; | |
498 | char padding[USTCTL_UST_FIELD_PADDING]; | |
499 | } LTTNG_PACKED; | |
500 | ||
501 | /* | |
502 | * Returns 0 on success, negative error value on error. | |
503 | * If an error other than -LTTNG_UST_ERR_UNSUP_MAJOR is returned, | |
504 | * the output fields are not populated. | |
505 | */ | |
506 | int ustctl_recv_reg_msg(int sock, | |
507 | enum ustctl_socket_type *type, | |
508 | uint32_t *major, | |
509 | uint32_t *minor, | |
510 | uint32_t *pid, | |
511 | uint32_t *ppid, | |
512 | uint32_t *uid, | |
513 | uint32_t *gid, | |
514 | uint32_t *bits_per_long, | |
515 | uint32_t *uint8_t_alignment, | |
516 | uint32_t *uint16_t_alignment, | |
517 | uint32_t *uint32_t_alignment, | |
518 | uint32_t *uint64_t_alignment, | |
519 | uint32_t *long_alignment, | |
520 | int *byte_order, | |
521 | char *name); /* size LTTNG_UST_ABI_PROCNAME_LEN */ | |
522 | ||
523 | /* | |
524 | * Returns 0 on success, negative UST or system error value on error. | |
525 | * Receive the notification command. The "notify_cmd" can then be used | |
526 | * by the caller to find out which ustctl_recv_* function should be | |
527 | * called to receive the notification, and which ustctl_reply_* is | |
528 | * appropriate. | |
529 | */ | |
530 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd); | |
531 | ||
532 | /* | |
533 | * Returns 0 on success, negative UST or system error value on error. | |
534 | */ | |
535 | int ustctl_recv_register_event(int sock, | |
536 | int *session_objd, /* session descriptor (output) */ | |
537 | int *channel_objd, /* channel descriptor (output) */ | |
538 | char *event_name, /* | |
539 | * event name (output, | |
540 | * size LTTNG_UST_SYM_NAME_LEN) | |
541 | */ | |
542 | int *loglevel, | |
543 | char **signature, /* | |
544 | * event signature | |
545 | * (output, dynamically | |
546 | * allocated, must be free(3)'d | |
547 | * by the caller if function | |
548 | * returns success.) | |
549 | */ | |
550 | size_t *nr_fields, | |
551 | struct ustctl_field **fields, | |
552 | char **model_emf_uri); | |
553 | ||
554 | /* | |
555 | * Returns 0 on success, negative error value on error. | |
556 | */ | |
557 | int ustctl_reply_register_event(int sock, | |
558 | uint32_t id, /* event id (input) */ | |
559 | int ret_code); /* return code. 0 ok, negative error */ | |
560 | ||
c785c634 MD |
561 | /* |
562 | * Returns 0 on success, negative UST or system error value on error. | |
563 | */ | |
564 | int ustctl_recv_register_enum(int sock, | |
565 | int *session_objd, | |
566 | char *enum_name, | |
567 | struct ustctl_enum_entry **entries, | |
568 | size_t *nr_entries); | |
569 | ||
570 | /* | |
571 | * Returns 0 on success, negative error value on error. | |
572 | */ | |
573 | int ustctl_reply_register_enum(int sock, | |
574 | uint64_t id, /* enum id (input) */ | |
575 | int ret_code); | |
576 | ||
32ce8569 MD |
577 | /* |
578 | * Returns 0 on success, negative UST or system error value on error. | |
579 | */ | |
580 | int ustctl_recv_register_channel(int sock, | |
581 | int *session_objd, /* session descriptor (output) */ | |
582 | int *channel_objd, /* channel descriptor (output) */ | |
583 | size_t *nr_fields, /* context fields */ | |
584 | struct ustctl_field **fields); | |
585 | ||
586 | /* | |
587 | * Returns 0 on success, negative error value on error. | |
588 | */ | |
589 | int ustctl_reply_register_channel(int sock, | |
590 | uint32_t chan_id, | |
591 | enum ustctl_channel_header header_type, | |
592 | int ret_code); /* return code. 0 ok, negative error */ | |
593 | ||
f3105c67 | 594 | #endif /* _LTTNG_UST_CTL_H */ |