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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 | ||
4318ae1b | 22 | #include <lttng/ust-abi.h> |
32ce8569 | 23 | #include <sys/types.h> |
74d81a6c MD |
24 | |
25 | #ifndef LTTNG_UST_UUID_LEN | |
26 | #define LTTNG_UST_UUID_LEN 16 | |
27 | #endif | |
28 | ||
32ce8569 MD |
29 | /* Default unix socket path */ |
30 | #define LTTNG_UST_SOCK_FILENAME \ | |
31 | "lttng-ust-sock-" \ | |
32 | __ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION) | |
33 | ||
34 | /* | |
35 | * Shared memory files path are automatically related to shm root, e.g. | |
36 | * /dev/shm under linux. | |
37 | */ | |
38 | #define LTTNG_UST_WAIT_FILENAME \ | |
39 | "lttng-ust-wait-" \ | |
40 | __ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION) | |
41 | ||
74d81a6c MD |
42 | struct lttng_ust_shm_handle; |
43 | struct lttng_ust_lib_ring_buffer; | |
44 | ||
45 | struct ustctl_consumer_channel_attr { | |
46 | enum lttng_ust_chan_type type; | |
47 | uint64_t subbuf_size; /* bytes */ | |
48 | uint64_t num_subbuf; /* power of 2 */ | |
49 | int overwrite; /* 1: overwrite, 0: discard */ | |
50 | unsigned int switch_timer_interval; /* usec */ | |
51 | unsigned int read_timer_interval; /* usec */ | |
52 | enum lttng_ust_output output; /* splice, mmap */ | |
6ca18e66 | 53 | uint32_t chan_id; /* channel ID */ |
74d81a6c MD |
54 | unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */ |
55 | } LTTNG_PACKED; | |
56 | ||
57 | /* | |
58 | * API used by sessiond. | |
59 | */ | |
60 | ||
7bc53e94 MD |
61 | /* |
62 | * Error values: all the following functions return: | |
c354a72c | 63 | * >= 0: Success (LTTNG_UST_OK) |
7bc53e94 MD |
64 | * < 0: error code. |
65 | */ | |
1c5e467e | 66 | int ustctl_register_done(int sock); |
f3105c67 | 67 | int ustctl_create_session(int sock); |
f3105c67 | 68 | int ustctl_create_event(int sock, struct lttng_ust_event *ev, |
61f02aea MD |
69 | struct lttng_ust_object_data *channel_data, |
70 | struct lttng_ust_object_data **event_data); | |
f3105c67 | 71 | int ustctl_add_context(int sock, struct lttng_ust_context *ctx, |
61f02aea MD |
72 | struct lttng_ust_object_data *obj_data, |
73 | struct lttng_ust_object_data **context_data); | |
cd54f6d9 MD |
74 | int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode, |
75 | struct lttng_ust_object_data *obj_data); | |
f3105c67 | 76 | |
61f02aea MD |
77 | int ustctl_enable(int sock, struct lttng_ust_object_data *object); |
78 | int ustctl_disable(int sock, struct lttng_ust_object_data *object); | |
4a6ca058 MD |
79 | int ustctl_start_session(int sock, int handle); |
80 | int ustctl_stop_session(int sock, int handle); | |
f3105c67 | 81 | |
b115631f MD |
82 | /* |
83 | * ustctl_tracepoint_list returns a tracepoint list handle, or negative | |
84 | * error value. | |
85 | */ | |
86 | int ustctl_tracepoint_list(int sock); | |
74d81a6c | 87 | |
b115631f MD |
88 | /* |
89 | * ustctl_tracepoint_list_get is used to iterate on the tp list | |
7bc53e94 MD |
90 | * handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is |
91 | * returned. | |
b115631f MD |
92 | */ |
93 | int ustctl_tracepoint_list_get(int sock, int tp_list_handle, | |
cbef6901 | 94 | struct lttng_ust_tracepoint_iter *iter); |
b115631f | 95 | |
40003310 MD |
96 | /* |
97 | * ustctl_tracepoint_field_list returns a tracepoint field list handle, | |
98 | * or negative error value. | |
99 | */ | |
100 | int ustctl_tracepoint_field_list(int sock); | |
101 | ||
102 | /* | |
103 | * ustctl_tracepoint_field_list_get is used to iterate on the tp field | |
7bc53e94 MD |
104 | * list handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is |
105 | * returned. | |
40003310 MD |
106 | */ |
107 | int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle, | |
108 | struct lttng_ust_field_iter *iter); | |
109 | ||
f3105c67 MD |
110 | int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v); |
111 | int ustctl_wait_quiescent(int sock); | |
112 | ||
f1fffc57 MD |
113 | int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object); |
114 | ||
f3105c67 MD |
115 | int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate); |
116 | ||
74d81a6c MD |
117 | /* Release object created by members of this API. */ |
118 | int ustctl_release_object(int sock, struct lttng_ust_object_data *data); | |
119 | /* Release handle returned by create session. */ | |
120 | int ustctl_release_handle(int sock, int handle); | |
121 | ||
122 | int ustctl_recv_channel_from_consumer(int sock, | |
123 | struct lttng_ust_object_data **channel_data); | |
124 | int ustctl_recv_stream_from_consumer(int sock, | |
125 | struct lttng_ust_object_data **stream_data); | |
126 | int ustctl_send_channel_to_ust(int sock, int session_handle, | |
127 | struct lttng_ust_object_data *channel_data); | |
128 | int ustctl_send_stream_to_ust(int sock, | |
129 | struct lttng_ust_object_data *channel_data, | |
130 | struct lttng_ust_object_data *stream_data); | |
131 | ||
12f3dabc MD |
132 | /* |
133 | * ustctl_duplicate_ust_object_data allocated a new object in "dest" if | |
134 | * it succeeds (returns 0). It must be released using | |
135 | * ustctl_release_object() and then freed with free(). | |
136 | */ | |
137 | int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest, | |
138 | struct lttng_ust_object_data *src); | |
139 | ||
f3105c67 | 140 | /* |
74d81a6c | 141 | * API used by consumer. |
f3105c67 | 142 | */ |
74d81a6c MD |
143 | |
144 | struct ustctl_consumer_channel; | |
145 | struct ustctl_consumer_stream; | |
146 | struct ustctl_consumer_channel_attr; | |
147 | ||
148 | struct ustctl_consumer_channel * | |
149 | ustctl_create_channel(struct ustctl_consumer_channel_attr *attr); | |
5224b5c8 | 150 | /* |
74d81a6c MD |
151 | * Each stream created needs to be destroyed before calling |
152 | * ustctl_destroy_channel(). | |
5224b5c8 | 153 | */ |
74d81a6c | 154 | void ustctl_destroy_channel(struct ustctl_consumer_channel *chan); |
f3105c67 | 155 | |
74d81a6c MD |
156 | int ustctl_send_channel_to_sessiond(int sock, |
157 | struct ustctl_consumer_channel *channel); | |
ff0f5728 MD |
158 | int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan); |
159 | int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan); | |
160 | int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *consumer_chan); | |
161 | int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *consumer_chan); | |
c9023c93 MD |
162 | |
163 | int ustctl_write_metadata_to_channel( | |
164 | struct ustctl_consumer_channel *channel, | |
165 | const char *metadata_str, /* NOT null-terminated */ | |
166 | size_t len); /* metadata length */ | |
3ef94b0e JD |
167 | ssize_t ustctl_write_one_packet_to_channel( |
168 | struct ustctl_consumer_channel *channel, | |
169 | const char *metadata_str, /* NOT null-terminated */ | |
170 | size_t len); /* metadata length */ | |
c9023c93 | 171 | |
74d81a6c MD |
172 | /* |
173 | * Send a NULL stream to finish iteration over all streams of a given | |
174 | * channel. | |
175 | */ | |
176 | int ustctl_send_stream_to_sessiond(int sock, | |
177 | struct ustctl_consumer_stream *stream); | |
178 | int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream); | |
179 | int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream); | |
ff0f5728 MD |
180 | int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream); |
181 | int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream); | |
f3105c67 | 182 | |
74d81a6c MD |
183 | /* Create/destroy stream buffers for read */ |
184 | struct ustctl_consumer_stream * | |
185 | ustctl_create_stream(struct ustctl_consumer_channel *channel, | |
186 | int cpu); | |
187 | void ustctl_destroy_stream(struct ustctl_consumer_stream *stream); | |
f3105c67 MD |
188 | |
189 | /* For mmap mode, readable without "get" operation */ | |
74d81a6c | 190 | int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream, |
f3105c67 | 191 | unsigned long *len); |
74d81a6c | 192 | int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream, |
f3105c67 MD |
193 | unsigned long *len); |
194 | ||
195 | /* | |
196 | * For mmap mode, operate on the current packet (between get/put or | |
197 | * get_next/put_next). | |
198 | */ | |
74d81a6c MD |
199 | void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream); |
200 | int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream, | |
201 | unsigned long *off); | |
202 | int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream, | |
203 | unsigned long *len); | |
204 | int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream, | |
205 | unsigned long *len); | |
206 | int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream); | |
207 | int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream); | |
f3105c67 MD |
208 | |
209 | /* snapshot */ | |
210 | ||
74d81a6c MD |
211 | int ustctl_snapshot(struct ustctl_consumer_stream *stream); |
212 | int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream, | |
213 | unsigned long *pos); | |
214 | int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream, | |
215 | unsigned long *pos); | |
216 | int ustctl_get_subbuf(struct ustctl_consumer_stream *stream, | |
217 | unsigned long *pos); | |
218 | int ustctl_put_subbuf(struct ustctl_consumer_stream *stream); | |
5f9d3dbc | 219 | |
74d81a6c MD |
220 | void ustctl_flush_buffer(struct ustctl_consumer_stream *stream, |
221 | int producer_active); | |
f3105c67 | 222 | |
32ce8569 MD |
223 | /* event registry management */ |
224 | ||
225 | enum ustctl_socket_type { | |
226 | USTCTL_SOCKET_CMD = 0, | |
227 | USTCTL_SOCKET_NOTIFY = 1, | |
228 | }; | |
229 | ||
230 | enum ustctl_notify_cmd { | |
231 | USTCTL_NOTIFY_CMD_EVENT = 0, | |
232 | USTCTL_NOTIFY_CMD_CHANNEL = 1, | |
233 | }; | |
234 | ||
235 | enum ustctl_channel_header { | |
236 | USTCTL_CHANNEL_HEADER_UNKNOWN = 0, | |
237 | USTCTL_CHANNEL_HEADER_COMPACT = 1, | |
238 | USTCTL_CHANNEL_HEADER_LARGE = 2, | |
239 | }; | |
240 | ||
241 | /* event type structures */ | |
242 | ||
243 | enum ustctl_abstract_types { | |
244 | ustctl_atype_integer, | |
245 | ustctl_atype_enum, | |
246 | ustctl_atype_array, | |
247 | ustctl_atype_sequence, | |
248 | ustctl_atype_string, | |
249 | ustctl_atype_float, | |
250 | NR_USTCTL_ABSTRACT_TYPES, | |
251 | }; | |
252 | ||
253 | enum ustctl_string_encodings { | |
254 | ustctl_encode_none = 0, | |
255 | ustctl_encode_UTF8 = 1, | |
256 | ustctl_encode_ASCII = 2, | |
257 | NR_USTCTL_STRING_ENCODINGS, | |
258 | }; | |
259 | ||
260 | #define USTCTL_UST_INTEGER_TYPE_PADDING 24 | |
261 | struct ustctl_integer_type { | |
262 | uint32_t size; /* in bits */ | |
263 | uint32_t signedness; | |
264 | uint32_t reverse_byte_order; | |
265 | uint32_t base; /* 2, 8, 10, 16, for pretty print */ | |
266 | enum ustctl_string_encodings encoding; | |
267 | uint16_t alignment; /* in bits */ | |
268 | char padding[USTCTL_UST_INTEGER_TYPE_PADDING]; | |
269 | } LTTNG_PACKED; | |
270 | ||
271 | #define USTCTL_UST_FLOAT_TYPE_PADDING 24 | |
272 | struct ustctl_float_type { | |
273 | uint32_t exp_dig; /* exponent digits, in bits */ | |
274 | uint32_t mant_dig; /* mantissa digits, in bits */ | |
275 | uint32_t reverse_byte_order; | |
276 | uint16_t alignment; /* in bits */ | |
277 | char padding[USTCTL_UST_FLOAT_TYPE_PADDING]; | |
278 | } LTTNG_PACKED; | |
279 | ||
280 | #define USTCTL_UST_BASIC_TYPE_PADDING 296 | |
281 | union _ustctl_basic_type { | |
282 | struct ustctl_integer_type integer; | |
283 | struct { | |
284 | enum ustctl_string_encodings encoding; | |
285 | } string; | |
286 | struct ustctl_float_type _float; | |
287 | char padding[USTCTL_UST_BASIC_TYPE_PADDING]; | |
288 | } LTTNG_PACKED; | |
289 | ||
290 | struct ustctl_basic_type { | |
291 | enum ustctl_abstract_types atype; | |
292 | union { | |
293 | union _ustctl_basic_type basic; | |
294 | } u; | |
295 | } LTTNG_PACKED; | |
296 | ||
297 | #define USTCTL_UST_TYPE_PADDING 128 | |
298 | struct ustctl_type { | |
299 | enum ustctl_abstract_types atype; | |
300 | union { | |
301 | union _ustctl_basic_type basic; | |
302 | struct { | |
303 | struct ustctl_basic_type elem_type; | |
304 | uint32_t length; /* num. elems. */ | |
305 | } array; | |
306 | struct { | |
307 | struct ustctl_basic_type length_type; | |
308 | struct ustctl_basic_type elem_type; | |
309 | } sequence; | |
310 | char padding[USTCTL_UST_TYPE_PADDING]; | |
311 | } u; | |
312 | } LTTNG_PACKED; | |
313 | ||
314 | #define USTCTL_UST_FIELD_PADDING 28 | |
315 | struct ustctl_field { | |
316 | char name[LTTNG_UST_SYM_NAME_LEN]; | |
317 | struct ustctl_type type; | |
318 | char padding[USTCTL_UST_FIELD_PADDING]; | |
319 | } LTTNG_PACKED; | |
320 | ||
321 | /* | |
322 | * Returns 0 on success, negative error value on error. | |
323 | * If an error other than -LTTNG_UST_ERR_UNSUP_MAJOR is returned, | |
324 | * the output fields are not populated. | |
325 | */ | |
326 | int ustctl_recv_reg_msg(int sock, | |
327 | enum ustctl_socket_type *type, | |
328 | uint32_t *major, | |
329 | uint32_t *minor, | |
330 | uint32_t *pid, | |
331 | uint32_t *ppid, | |
332 | uint32_t *uid, | |
333 | uint32_t *gid, | |
334 | uint32_t *bits_per_long, | |
335 | uint32_t *uint8_t_alignment, | |
336 | uint32_t *uint16_t_alignment, | |
337 | uint32_t *uint32_t_alignment, | |
338 | uint32_t *uint64_t_alignment, | |
339 | uint32_t *long_alignment, | |
340 | int *byte_order, | |
341 | char *name); /* size LTTNG_UST_ABI_PROCNAME_LEN */ | |
342 | ||
343 | /* | |
344 | * Returns 0 on success, negative UST or system error value on error. | |
345 | * Receive the notification command. The "notify_cmd" can then be used | |
346 | * by the caller to find out which ustctl_recv_* function should be | |
347 | * called to receive the notification, and which ustctl_reply_* is | |
348 | * appropriate. | |
349 | */ | |
350 | int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd); | |
351 | ||
352 | /* | |
353 | * Returns 0 on success, negative UST or system error value on error. | |
354 | */ | |
355 | int ustctl_recv_register_event(int sock, | |
356 | int *session_objd, /* session descriptor (output) */ | |
357 | int *channel_objd, /* channel descriptor (output) */ | |
358 | char *event_name, /* | |
359 | * event name (output, | |
360 | * size LTTNG_UST_SYM_NAME_LEN) | |
361 | */ | |
362 | int *loglevel, | |
363 | char **signature, /* | |
364 | * event signature | |
365 | * (output, dynamically | |
366 | * allocated, must be free(3)'d | |
367 | * by the caller if function | |
368 | * returns success.) | |
369 | */ | |
370 | size_t *nr_fields, | |
371 | struct ustctl_field **fields, | |
372 | char **model_emf_uri); | |
373 | ||
374 | /* | |
375 | * Returns 0 on success, negative error value on error. | |
376 | */ | |
377 | int ustctl_reply_register_event(int sock, | |
378 | uint32_t id, /* event id (input) */ | |
379 | int ret_code); /* return code. 0 ok, negative error */ | |
380 | ||
381 | /* | |
382 | * Returns 0 on success, negative UST or system error value on error. | |
383 | */ | |
384 | int ustctl_recv_register_channel(int sock, | |
385 | int *session_objd, /* session descriptor (output) */ | |
386 | int *channel_objd, /* channel descriptor (output) */ | |
387 | size_t *nr_fields, /* context fields */ | |
388 | struct ustctl_field **fields); | |
389 | ||
390 | /* | |
391 | * Returns 0 on success, negative error value on error. | |
392 | */ | |
393 | int ustctl_reply_register_channel(int sock, | |
394 | uint32_t chan_id, | |
395 | enum ustctl_channel_header header_type, | |
396 | int ret_code); /* return code. 0 ok, negative error */ | |
397 | ||
f3105c67 | 398 | #endif /* _LTTNG_UST_CTL_H */ |