2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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.
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.
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.
19 #ifndef _LTTNG_UST_CTL_H
20 #define _LTTNG_UST_CTL_H
26 #include <sys/types.h>
28 #include <lttng/ust-abi.h>
31 #error "LTTNG_PACKED should be defined"
34 #ifndef LTTNG_UST_UUID_LEN
35 #define LTTNG_UST_UUID_LEN 16
38 /* Default unix socket path */
39 #define LTTNG_UST_SOCK_FILENAME \
41 __ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)
44 * Shared memory files path are automatically related to shm root, e.g.
45 * /dev/shm under linux.
47 #define LTTNG_UST_WAIT_FILENAME \
49 __ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)
51 struct lttng_ust_shm_handle
;
52 struct lttng_ust_lib_ring_buffer
;
54 struct ustctl_consumer_channel_attr
{
55 enum lttng_ust_chan_type type
;
56 uint64_t subbuf_size
; /* bytes */
57 uint64_t num_subbuf
; /* power of 2 */
58 int overwrite
; /* 1: overwrite, 0: discard */
59 unsigned int switch_timer_interval
; /* usec */
60 unsigned int read_timer_interval
; /* usec */
61 enum lttng_ust_output output
; /* splice, mmap */
62 uint32_t chan_id
; /* channel ID */
63 unsigned char uuid
[LTTNG_UST_UUID_LEN
]; /* Trace session unique ID */
64 int64_t blocking_timeout
; /* Blocking timeout (usec) */
68 * API used by sessiond.
71 struct lttng_ust_context_attr
{
72 enum lttng_ust_context_type ctx
;
74 struct lttng_ust_perf_counter_ctx perf_counter
;
83 * Error values: all the following functions return:
84 * >= 0: Success (LTTNG_UST_OK)
87 int ustctl_register_done(int sock
);
88 int ustctl_create_session(int sock
);
89 int ustctl_create_event(int sock
, struct lttng_ust_event
*ev
,
90 struct lttng_ust_object_data
*channel_data
,
91 struct lttng_ust_object_data
**event_data
);
92 int ustctl_add_context(int sock
, struct lttng_ust_context_attr
*ctx
,
93 struct lttng_ust_object_data
*obj_data
,
94 struct lttng_ust_object_data
**context_data
);
95 int ustctl_set_filter(int sock
, struct lttng_ust_filter_bytecode
*bytecode
,
96 struct lttng_ust_object_data
*obj_data
);
97 int ustctl_set_capture(int sock
, struct lttng_ust_capture_bytecode
*bytecode
,
98 struct lttng_ust_object_data
*obj_data
);
99 int ustctl_set_exclusion(int sock
, struct lttng_ust_event_exclusion
*exclusion
,
100 struct lttng_ust_object_data
*obj_data
);
102 int ustctl_enable(int sock
, struct lttng_ust_object_data
*object
);
103 int ustctl_disable(int sock
, struct lttng_ust_object_data
*object
);
104 int ustctl_start_session(int sock
, int handle
);
105 int ustctl_stop_session(int sock
, int handle
);
108 * ustctl_create_trigger_group creates a trigger group. It establishes the
109 * connection with the application by providing a file descriptor of the pipe
110 * to be used by the application when a trigger of that group is fired. It
111 * returns a handle to be used when creating trigger in that group.
113 int ustctl_create_trigger_group(int sock
, int pipe_fd
,
114 struct lttng_ust_object_data
**trigger_group
);
117 * ustctl_create_trigger creates a trigger in a trigger group giving a trigger
118 * description and a trigger group handle. It returns a trigger handle to be
119 * used when enabling the trigger, attaching filter, attaching exclusion, and
120 * disabling the trigger.
122 int ustctl_create_trigger(int sock
, struct lttng_ust_trigger
*trigger
,
123 struct lttng_ust_object_data
*trigger_group
,
124 struct lttng_ust_object_data
**trigger_data
);
127 * ustctl_tracepoint_list returns a tracepoint list handle, or negative
130 int ustctl_tracepoint_list(int sock
);
133 * ustctl_tracepoint_list_get is used to iterate on the tp list
134 * handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
137 int ustctl_tracepoint_list_get(int sock
, int tp_list_handle
,
138 struct lttng_ust_tracepoint_iter
*iter
);
141 * ustctl_tracepoint_field_list returns a tracepoint field list handle,
142 * or negative error value.
144 int ustctl_tracepoint_field_list(int sock
);
147 * ustctl_tracepoint_field_list_get is used to iterate on the tp field
148 * list handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
151 int ustctl_tracepoint_field_list_get(int sock
, int tp_field_list_handle
,
152 struct lttng_ust_field_iter
*iter
);
154 int ustctl_tracer_version(int sock
, struct lttng_ust_tracer_version
*v
);
155 int ustctl_wait_quiescent(int sock
);
157 int ustctl_sock_flush_buffer(int sock
, struct lttng_ust_object_data
*object
);
159 int ustctl_calibrate(int sock
, struct lttng_ust_calibrate
*calibrate
);
161 /* Release object created by members of this API. */
162 int ustctl_release_object(int sock
, struct lttng_ust_object_data
*data
);
163 /* Release handle returned by create session. */
164 int ustctl_release_handle(int sock
, int handle
);
166 int ustctl_recv_channel_from_consumer(int sock
,
167 struct lttng_ust_object_data
**channel_data
);
168 int ustctl_recv_stream_from_consumer(int sock
,
169 struct lttng_ust_object_data
**stream_data
);
170 int ustctl_send_channel_to_ust(int sock
, int session_handle
,
171 struct lttng_ust_object_data
*channel_data
);
172 int ustctl_send_stream_to_ust(int sock
,
173 struct lttng_ust_object_data
*channel_data
,
174 struct lttng_ust_object_data
*stream_data
);
177 * ustctl_duplicate_ust_object_data allocated a new object in "dest" if
178 * it succeeds (returns 0). It must be released using
179 * ustctl_release_object() and then freed with free().
181 int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data
**dest
,
182 struct lttng_ust_object_data
*src
);
185 * API used by consumer.
188 struct ustctl_consumer_channel
;
189 struct ustctl_consumer_stream
;
190 struct ustctl_consumer_channel_attr
;
192 int ustctl_get_nr_stream_per_channel(void);
194 struct ustctl_consumer_channel
*
195 ustctl_create_channel(struct ustctl_consumer_channel_attr
*attr
,
196 const int *stream_fds
, int nr_stream_fds
);
198 * Each stream created needs to be destroyed before calling
199 * ustctl_destroy_channel().
201 void ustctl_destroy_channel(struct ustctl_consumer_channel
*chan
);
203 int ustctl_send_channel_to_sessiond(int sock
,
204 struct ustctl_consumer_channel
*channel
);
205 int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel
*consumer_chan
);
206 int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel
*consumer_chan
);
207 int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel
*consumer_chan
);
208 int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel
*consumer_chan
);
210 int ustctl_write_metadata_to_channel(
211 struct ustctl_consumer_channel
*channel
,
212 const char *metadata_str
, /* NOT null-terminated */
213 size_t len
); /* metadata length */
214 ssize_t
ustctl_write_one_packet_to_channel(
215 struct ustctl_consumer_channel
*channel
,
216 const char *metadata_str
, /* NOT null-terminated */
217 size_t len
); /* metadata length */
220 * Send a NULL stream to finish iteration over all streams of a given
223 int ustctl_send_stream_to_sessiond(int sock
,
224 struct ustctl_consumer_stream
*stream
);
225 int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream
*stream
);
226 int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream
*stream
);
227 int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream
*stream
);
228 int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream
*stream
);
230 /* Create/destroy stream buffers for read */
231 struct ustctl_consumer_stream
*
232 ustctl_create_stream(struct ustctl_consumer_channel
*channel
,
234 void ustctl_destroy_stream(struct ustctl_consumer_stream
*stream
);
236 /* For mmap mode, readable without "get" operation */
237 int ustctl_get_mmap_len(struct ustctl_consumer_stream
*stream
,
239 int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream
*stream
,
243 * For mmap mode, operate on the current packet (between get/put or
244 * get_next/put_next).
246 void *ustctl_get_mmap_base(struct ustctl_consumer_stream
*stream
);
247 int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream
*stream
,
249 int ustctl_get_subbuf_size(struct ustctl_consumer_stream
*stream
,
251 int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream
*stream
,
253 int ustctl_get_next_subbuf(struct ustctl_consumer_stream
*stream
);
254 int ustctl_put_next_subbuf(struct ustctl_consumer_stream
*stream
);
258 int ustctl_snapshot(struct ustctl_consumer_stream
*stream
);
259 int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream
*stream
);
260 int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream
*stream
,
262 int ustctl_snapshot_get_produced(struct ustctl_consumer_stream
*stream
,
264 int ustctl_get_subbuf(struct ustctl_consumer_stream
*stream
,
266 int ustctl_put_subbuf(struct ustctl_consumer_stream
*stream
);
268 void ustctl_flush_buffer(struct ustctl_consumer_stream
*stream
,
269 int producer_active
);
270 void ustctl_clear_buffer(struct ustctl_consumer_stream
*stream
);
275 * Getters which need to be used on the current packet (between get/put
276 * or get_next/put_next.
279 int ustctl_get_timestamp_begin(struct ustctl_consumer_stream
*stream
,
280 uint64_t *timestamp_begin
);
281 int ustctl_get_timestamp_end(struct ustctl_consumer_stream
*stream
,
282 uint64_t *timestamp_end
);
283 int ustctl_get_events_discarded(struct ustctl_consumer_stream
*stream
,
284 uint64_t *events_discarded
);
285 int ustctl_get_content_size(struct ustctl_consumer_stream
*stream
,
286 uint64_t *content_size
);
287 int ustctl_get_packet_size(struct ustctl_consumer_stream
*stream
,
288 uint64_t *packet_size
);
289 int ustctl_get_sequence_number(struct ustctl_consumer_stream
*stream
,
293 * Getter returning state invariant for the stream, which can be used
294 * without "get" operation.
297 int ustctl_get_stream_id(struct ustctl_consumer_stream
*stream
,
298 uint64_t *stream_id
);
299 int ustctl_get_instance_id(struct ustctl_consumer_stream
*stream
,
303 * Getter returning the current timestamp as perceived from the
306 int ustctl_get_current_timestamp(struct ustctl_consumer_stream
*stream
,
309 /* returns whether UST has perf counters support. */
310 int ustctl_has_perf_counters(void);
312 /* Regenerate the statedump. */
313 int ustctl_regenerate_statedump(int sock
, int handle
);
315 /* event registry management */
317 enum ustctl_socket_type
{
318 USTCTL_SOCKET_CMD
= 0,
319 USTCTL_SOCKET_NOTIFY
= 1,
322 enum ustctl_notify_cmd
{
323 USTCTL_NOTIFY_CMD_EVENT
= 0,
324 USTCTL_NOTIFY_CMD_CHANNEL
= 1,
325 USTCTL_NOTIFY_CMD_ENUM
= 2,
328 enum ustctl_channel_header
{
329 USTCTL_CHANNEL_HEADER_UNKNOWN
= 0,
330 USTCTL_CHANNEL_HEADER_COMPACT
= 1,
331 USTCTL_CHANNEL_HEADER_LARGE
= 2,
334 /* event type structures */
336 enum ustctl_abstract_types
{
337 ustctl_atype_integer
,
338 ustctl_atype_enum
, /* legacy */
339 ustctl_atype_array
, /* legacy */
340 ustctl_atype_sequence
, /* legacy */
343 ustctl_atype_variant
, /* legacy */
344 ustctl_atype_struct
, /* legacy */
345 ustctl_atype_enum_nestable
,
346 ustctl_atype_array_nestable
,
347 ustctl_atype_sequence_nestable
,
348 ustctl_atype_struct_nestable
,
349 ustctl_atype_variant_nestable
,
350 NR_USTCTL_ABSTRACT_TYPES
,
353 enum ustctl_string_encodings
{
354 ustctl_encode_none
= 0,
355 ustctl_encode_UTF8
= 1,
356 ustctl_encode_ASCII
= 2,
357 NR_USTCTL_STRING_ENCODINGS
,
360 #define USTCTL_UST_INTEGER_TYPE_PADDING 24
361 struct ustctl_integer_type
{
362 uint32_t size
; /* in bits */
364 uint32_t reverse_byte_order
;
365 uint32_t base
; /* 2, 8, 10, 16, for pretty print */
366 int32_t encoding
; /* enum ustctl_string_encodings */
367 uint16_t alignment
; /* in bits */
368 char padding
[USTCTL_UST_INTEGER_TYPE_PADDING
];
371 #define USTCTL_UST_FLOAT_TYPE_PADDING 24
372 struct ustctl_float_type
{
373 uint32_t exp_dig
; /* exponent digits, in bits */
374 uint32_t mant_dig
; /* mantissa digits, in bits */
375 uint32_t reverse_byte_order
;
376 uint16_t alignment
; /* in bits */
377 char padding
[USTCTL_UST_FLOAT_TYPE_PADDING
];
380 #define USTCTL_UST_ENUM_VALUE_PADDING 15
381 struct ustctl_enum_value
{
384 char padding
[USTCTL_UST_ENUM_VALUE_PADDING
];
387 enum ustctl_ust_enum_entry_options
{
388 USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO
= 1U << 0,
391 #define USTCTL_UST_ENUM_ENTRY_PADDING 32
392 struct ustctl_enum_entry
{
393 struct ustctl_enum_value start
, end
; /* start and end are inclusive */
394 char string
[LTTNG_UST_SYM_NAME_LEN
];
398 } LTTNG_PACKED extra
;
399 char padding
[USTCTL_UST_ENUM_ENTRY_PADDING
];
404 #define USTCTL_UST_BASIC_TYPE_PADDING 296
405 union _ustctl_basic_type
{
406 struct ustctl_integer_type integer
;
408 char name
[LTTNG_UST_SYM_NAME_LEN
];
409 struct ustctl_integer_type container_type
;
410 uint64_t id
; /* enum ID in sessiond. */
413 int32_t encoding
; /* enum ustctl_string_encodings */
415 struct ustctl_float_type _float
;
416 char padding
[USTCTL_UST_BASIC_TYPE_PADDING
];
420 struct ustctl_basic_type
{
421 enum ustctl_abstract_types atype
;
423 union _ustctl_basic_type basic
;
428 * Padding is derived from largest member: u.legacy.sequence which
429 * contains two basic types, each with USTCTL_UST_BASIC_TYPE_PADDING.
431 #define USTCTL_UST_TYPE_PADDING (2 * USTCTL_UST_BASIC_TYPE_PADDING)
433 enum ustctl_abstract_types atype
;
435 struct ustctl_integer_type integer
;
436 struct ustctl_float_type _float
;
438 int32_t encoding
; /* enum ustctl_string_encodings */
441 char name
[LTTNG_UST_SYM_NAME_LEN
];
442 uint64_t id
; /* enum ID in sessiond. */
443 /* container_type follows after this struct ustctl_field. */
446 uint32_t length
; /* num. elems. */
448 /* elem_type follows after this struct ustctl_field. */
451 char length_name
[LTTNG_UST_SYM_NAME_LEN
];
452 uint32_t alignment
; /* Alignment before elements. */
453 /* elem_type follows after the length_type. */
458 /* Followed by nr_fields struct ustctl_field. */
462 char tag_name
[LTTNG_UST_SYM_NAME_LEN
];
464 /* Followed by nr_choices struct ustctl_field. */
469 union _ustctl_basic_type basic
;
471 struct ustctl_basic_type elem_type
;
472 uint32_t length
; /* num. elems. */
475 struct ustctl_basic_type length_type
;
476 struct ustctl_basic_type elem_type
;
480 /* Followed by nr_fields struct ustctl_field. */
484 char tag_name
[LTTNG_UST_SYM_NAME_LEN
];
485 /* Followed by nr_choices struct ustctl_field. */
488 char padding
[USTCTL_UST_TYPE_PADDING
];
492 #define USTCTL_UST_FIELD_PADDING 28
493 struct ustctl_field
{
494 char name
[LTTNG_UST_SYM_NAME_LEN
];
495 struct ustctl_type type
;
496 char padding
[USTCTL_UST_FIELD_PADDING
];
500 * Returns 0 on success, negative error value on error.
501 * If an error other than -LTTNG_UST_ERR_UNSUP_MAJOR is returned,
502 * the output fields are not populated.
504 int ustctl_recv_reg_msg(int sock
,
505 enum ustctl_socket_type
*type
,
512 uint32_t *bits_per_long
,
513 uint32_t *uint8_t_alignment
,
514 uint32_t *uint16_t_alignment
,
515 uint32_t *uint32_t_alignment
,
516 uint32_t *uint64_t_alignment
,
517 uint32_t *long_alignment
,
519 char *name
); /* size LTTNG_UST_ABI_PROCNAME_LEN */
522 * Returns 0 on success, negative UST or system error value on error.
523 * Receive the notification command. The "notify_cmd" can then be used
524 * by the caller to find out which ustctl_recv_* function should be
525 * called to receive the notification, and which ustctl_reply_* is
528 int ustctl_recv_notify(int sock
, enum ustctl_notify_cmd
*notify_cmd
);
531 * Returns 0 on success, negative UST or system error value on error.
533 int ustctl_recv_register_event(int sock
,
534 int *session_objd
, /* session descriptor (output) */
535 int *channel_objd
, /* channel descriptor (output) */
537 * event name (output,
538 * size LTTNG_UST_SYM_NAME_LEN)
543 * (output, dynamically
544 * allocated, must be free(3)'d
545 * by the caller if function
549 struct ustctl_field
**fields
,
550 char **model_emf_uri
);
553 * Returns 0 on success, negative error value on error.
555 int ustctl_reply_register_event(int sock
,
556 uint32_t id
, /* event id (input) */
557 int ret_code
); /* return code. 0 ok, negative error */
560 * Returns 0 on success, negative UST or system error value on error.
562 int ustctl_recv_register_enum(int sock
,
565 struct ustctl_enum_entry
**entries
,
569 * Returns 0 on success, negative error value on error.
571 int ustctl_reply_register_enum(int sock
,
572 uint64_t id
, /* enum id (input) */
576 * Returns 0 on success, negative UST or system error value on error.
578 int ustctl_recv_register_channel(int sock
,
579 int *session_objd
, /* session descriptor (output) */
580 int *channel_objd
, /* channel descriptor (output) */
581 size_t *nr_fields
, /* context fields */
582 struct ustctl_field
**fields
);
585 * Returns 0 on success, negative error value on error.
587 int ustctl_reply_register_channel(int sock
,
589 enum ustctl_channel_header header_type
,
590 int ret_code
); /* return code. 0 ok, negative error */
596 enum ustctl_counter_bitness
{
597 USTCTL_COUNTER_BITNESS_32
= 4,
598 USTCTL_COUNTER_BITNESS_64
= 8,
601 enum ustctl_counter_arithmetic
{
602 USTCTL_COUNTER_ARITHMETIC_MODULAR
= 0,
603 USTCTL_COUNTER_ARITHMETIC_SATURATION
= 1,
606 /* Used as alloc flags. */
607 enum ustctl_counter_alloc
{
608 USTCTL_COUNTER_ALLOC_PER_CPU
= (1 << 0),
609 USTCTL_COUNTER_ALLOC_GLOBAL
= (1 << 1),
612 struct ustctl_daemon_counter
;
614 int ustctl_get_nr_cpu_per_counter(void);
616 struct ustctl_counter_dimension
{
618 uint64_t underflow_index
;
619 uint64_t overflow_index
;
620 uint8_t has_underflow
;
621 uint8_t has_overflow
;
624 struct ustctl_daemon_counter
*
625 ustctl_create_counter(size_t nr_dimensions
,
626 const struct ustctl_counter_dimension
*dimensions
,
627 int64_t global_sum_step
,
628 int global_counter_fd
,
629 int nr_counter_cpu_fds
,
630 const int *counter_cpu_fds
,
631 enum ustctl_counter_bitness bitness
,
632 enum ustctl_counter_arithmetic arithmetic
,
633 uint32_t alloc_flags
);
635 int ustctl_create_counter_data(struct ustctl_daemon_counter
*counter
,
636 struct lttng_ust_object_data
**counter_data
);
638 int ustctl_create_counter_global_data(struct ustctl_daemon_counter
*counter
,
639 struct lttng_ust_object_data
**counter_global_data
);
640 int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter
*counter
, int cpu
,
641 struct lttng_ust_object_data
**counter_cpu_data
);
644 * Each counter data and counter cpu data created need to be destroyed
645 * before calling ustctl_destroy_counter().
647 void ustctl_destroy_counter(struct ustctl_daemon_counter
*counter
);
649 int ustctl_send_counter_data_to_ust(int sock
, int parent_handle
,
650 struct lttng_ust_object_data
*counter_data
);
651 int ustctl_send_counter_global_data_to_ust(int sock
,
652 struct lttng_ust_object_data
*counter_data
,
653 struct lttng_ust_object_data
*counter_global_data
);
654 int ustctl_send_counter_cpu_data_to_ust(int sock
,
655 struct lttng_ust_object_data
*counter_data
,
656 struct lttng_ust_object_data
*counter_cpu_data
);
658 int ustctl_counter_read(struct ustctl_daemon_counter
*counter
,
659 const size_t *dimension_indexes
,
660 int cpu
, int64_t *value
,
661 bool *overflow
, bool *underflow
);
662 int ustctl_counter_aggregate(struct ustctl_daemon_counter
*counter
,
663 const size_t *dimension_indexes
,
665 bool *overflow
, bool *underflow
);
666 int ustctl_counter_clear(struct ustctl_daemon_counter
*counter
,
667 const size_t *dimension_indexes
);
669 #endif /* _LTTNG_UST_CTL_H */