2 * SPDX-License-Identifier: MIT
4 * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com>
5 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
6 * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * Babeltrace CTF LTTng-live Client Component
11 #define BT_COMP_LOG_SELF_COMP self_comp
12 #define BT_LOG_OUTPUT_LEVEL log_level
13 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE"
14 #include "logging/comp-logging.h"
22 #include "common/assert.h"
23 #include <babeltrace2/babeltrace.h>
24 #include "compat/compiler.h"
25 #include <babeltrace2/types.h>
27 #include "plugins/common/muxing/muxing.h"
28 #include "plugins/common/param-validation/param-validation.h"
30 #include "data-stream.h"
32 #include "lttng-live.h"
34 #define MAX_QUERY_SIZE (256*1024)
35 #define URL_PARAM "url"
36 #define INPUTS_PARAM "inputs"
37 #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action"
38 #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue"
39 #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail"
40 #define SESS_NOT_FOUND_ACTION_END_STR "end"
42 #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__)
45 const char *lttng_live_iterator_status_string(
46 enum lttng_live_iterator_status status
)
49 case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
:
50 return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE";
51 case LTTNG_LIVE_ITERATOR_STATUS_AGAIN
:
52 return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN";
53 case LTTNG_LIVE_ITERATOR_STATUS_END
:
54 return "LTTNG_LIVE_ITERATOR_STATUS_END";
55 case LTTNG_LIVE_ITERATOR_STATUS_OK
:
56 return "LTTNG_LIVE_ITERATOR_STATUS_OK";
57 case LTTNG_LIVE_ITERATOR_STATUS_INVAL
:
58 return "LTTNG_LIVE_ITERATOR_STATUS_INVAL";
59 case LTTNG_LIVE_ITERATOR_STATUS_ERROR
:
60 return "LTTNG_LIVE_ITERATOR_STATUS_ERROR";
61 case LTTNG_LIVE_ITERATOR_STATUS_NOMEM
:
62 return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM";
63 case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED
:
64 return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED";
71 const char *lttng_live_stream_state_string(enum lttng_live_stream_state state
)
74 case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
:
75 return "ACTIVE_NO_DATA";
76 case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA
:
77 return "QUIESCENT_NO_DATA";
78 case LTTNG_LIVE_STREAM_QUIESCENT
:
80 case LTTNG_LIVE_STREAM_ACTIVE_DATA
:
82 case LTTNG_LIVE_STREAM_EOF
:
89 #define LTTNG_LIVE_LOGD_STREAM_ITER(live_stream_iter) \
91 BT_COMP_LOGD("Live stream iterator state=%s, last-inact-ts=%" PRId64 \
92 ", curr-inact-ts %" PRId64, \
93 lttng_live_stream_state_string(live_stream_iter->state), \
94 live_stream_iter->last_inactivity_ts, \
95 live_stream_iter->current_inactivity_ts); \
99 bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter
*msg_iter
)
108 ret
= bt_self_message_iterator_is_interrupted(
109 msg_iter
->self_msg_iter
);
116 struct lttng_live_trace
*lttng_live_session_borrow_trace_by_id(struct lttng_live_session
*session
,
120 struct lttng_live_trace
*ret_trace
= NULL
;
122 for (trace_idx
= 0; trace_idx
< session
->traces
->len
; trace_idx
++) {
123 struct lttng_live_trace
*trace
=
124 g_ptr_array_index(session
->traces
, trace_idx
);
125 if (trace
->id
== trace_id
) {
136 void lttng_live_destroy_trace(struct lttng_live_trace
*trace
)
138 bt_logging_level log_level
= trace
->log_level
;
139 bt_self_component
*self_comp
= trace
->self_comp
;
141 BT_COMP_LOGD("Destroying live trace: trace-id=%"PRIu64
, trace
->id
);
143 BT_ASSERT(trace
->stream_iterators
);
144 g_ptr_array_free(trace
->stream_iterators
, TRUE
);
146 BT_TRACE_PUT_REF_AND_RESET(trace
->trace
);
147 BT_TRACE_CLASS_PUT_REF_AND_RESET(trace
->trace_class
);
149 lttng_live_metadata_fini(trace
);
154 struct lttng_live_trace
*lttng_live_create_trace(struct lttng_live_session
*session
,
157 struct lttng_live_trace
*trace
= NULL
;
158 bt_logging_level log_level
= session
->log_level
;
159 bt_self_component
*self_comp
= session
->self_comp
;
161 BT_COMP_LOGD("Creating live trace: "
162 "session-id=%"PRIu64
", trace-id=%"PRIu64
,
163 session
->id
, trace_id
);
164 trace
= g_new0(struct lttng_live_trace
, 1);
166 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
167 "Failed to allocate live trace");
170 trace
->log_level
= session
->log_level
;
171 trace
->self_comp
= session
->self_comp
;
172 trace
->session
= session
;
173 trace
->id
= trace_id
;
174 trace
->trace_class
= NULL
;
176 trace
->stream_iterators
= g_ptr_array_new_with_free_func(
177 (GDestroyNotify
) lttng_live_stream_iterator_destroy
);
178 BT_ASSERT(trace
->stream_iterators
);
179 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
180 g_ptr_array_add(session
->traces
, trace
);
191 struct lttng_live_trace
*lttng_live_session_borrow_or_create_trace_by_id(
192 struct lttng_live_session
*session
, uint64_t trace_id
)
194 struct lttng_live_trace
*trace
;
196 trace
= lttng_live_session_borrow_trace_by_id(session
, trace_id
);
201 /* The session is the owner of the newly created trace. */
202 trace
= lttng_live_create_trace(session
, trace_id
);
209 int lttng_live_add_session(struct lttng_live_msg_iter
*lttng_live_msg_iter
,
210 uint64_t session_id
, const char *hostname
,
211 const char *session_name
)
214 struct lttng_live_session
*session
;
215 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
216 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
218 BT_COMP_LOGD("Adding live session: "
219 "session-id=%" PRIu64
", hostname=\"%s\" session-name=\"%s\"",
220 session_id
, hostname
, session_name
);
222 session
= g_new0(struct lttng_live_session
, 1);
224 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
225 "Failed to allocate live session");
229 session
->log_level
= lttng_live_msg_iter
->log_level
;
230 session
->self_comp
= lttng_live_msg_iter
->self_comp
;
231 session
->id
= session_id
;
232 session
->traces
= g_ptr_array_new_with_free_func(
233 (GDestroyNotify
) lttng_live_destroy_trace
);
234 BT_ASSERT(session
->traces
);
235 session
->lttng_live_msg_iter
= lttng_live_msg_iter
;
236 session
->new_streams_needed
= true;
237 session
->hostname
= g_string_new(hostname
);
238 BT_ASSERT(session
->hostname
);
240 session
->session_name
= g_string_new(session_name
);
241 BT_ASSERT(session
->session_name
);
243 g_ptr_array_add(lttng_live_msg_iter
->sessions
, session
);
253 void lttng_live_destroy_session(struct lttng_live_session
*session
)
255 bt_logging_level log_level
;
256 bt_self_component
*self_comp
;
262 log_level
= session
->log_level
;
263 self_comp
= session
->self_comp
;
264 BT_COMP_LOGD("Destroying live session: "
265 "session-id=%"PRIu64
", session-name=\"%s\"",
266 session
->id
, session
->session_name
->str
);
267 if (session
->id
!= -1ULL) {
268 if (lttng_live_session_detach(session
)) {
269 if (!lttng_live_graph_is_canceled(
270 session
->lttng_live_msg_iter
)) {
271 /* Old relayd cannot detach sessions. */
272 BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64
,
279 if (session
->traces
) {
280 g_ptr_array_free(session
->traces
, TRUE
);
283 if (session
->hostname
) {
284 g_string_free(session
->hostname
, TRUE
);
286 if (session
->session_name
) {
287 g_string_free(session
->session_name
, TRUE
);
296 void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
298 if (!lttng_live_msg_iter
) {
302 if (lttng_live_msg_iter
->sessions
) {
303 g_ptr_array_free(lttng_live_msg_iter
->sessions
, TRUE
);
306 if (lttng_live_msg_iter
->viewer_connection
) {
307 live_viewer_connection_destroy(lttng_live_msg_iter
->viewer_connection
);
309 BT_ASSERT(lttng_live_msg_iter
->lttng_live_comp
);
310 BT_ASSERT(lttng_live_msg_iter
->lttng_live_comp
->has_msg_iter
);
312 /* All stream iterators must be destroyed at this point. */
313 BT_ASSERT(lttng_live_msg_iter
->active_stream_iter
== 0);
314 lttng_live_msg_iter
->lttng_live_comp
->has_msg_iter
= false;
316 g_free(lttng_live_msg_iter
);
323 void lttng_live_msg_iter_finalize(bt_self_message_iterator
*self_msg_iter
)
325 struct lttng_live_msg_iter
*lttng_live_msg_iter
;
327 BT_ASSERT(self_msg_iter
);
329 lttng_live_msg_iter
= bt_self_message_iterator_get_data(self_msg_iter
);
330 BT_ASSERT(lttng_live_msg_iter
);
331 lttng_live_msg_iter_destroy(lttng_live_msg_iter
);
335 enum lttng_live_iterator_status
lttng_live_iterator_next_check_stream_state(
336 struct lttng_live_stream_iterator
*lttng_live_stream
)
338 bt_logging_level log_level
= lttng_live_stream
->log_level
;
339 bt_self_component
*self_comp
= lttng_live_stream
->self_comp
;
341 switch (lttng_live_stream
->state
) {
342 case LTTNG_LIVE_STREAM_QUIESCENT
:
343 case LTTNG_LIVE_STREAM_ACTIVE_DATA
:
345 case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
:
347 BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\"");
349 case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA
:
351 BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\"");
353 case LTTNG_LIVE_STREAM_EOF
:
356 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
360 * For active no data stream, fetch next data. It can be either:
361 * - quiescent: need to put it in the prio heap at quiescent end
363 * - have data: need to wire up first event into the prio heap,
364 * - have no data on this stream at this point: need to retry (AGAIN) or
368 enum lttng_live_iterator_status
lttng_live_iterator_next_handle_one_no_data_stream(
369 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
370 struct lttng_live_stream_iterator
*lttng_live_stream
)
372 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
373 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
374 enum lttng_live_iterator_status ret
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
375 enum lttng_live_stream_state orig_state
= lttng_live_stream
->state
;
376 struct packet_index index
;
378 if (lttng_live_stream
->trace
->metadata_stream_state
==
379 LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
) {
380 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
383 if (lttng_live_stream
->trace
->session
->new_streams_needed
) {
384 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
387 if (lttng_live_stream
->state
!= LTTNG_LIVE_STREAM_ACTIVE_NO_DATA
&&
388 lttng_live_stream
->state
!= LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA
) {
391 ret
= lttng_live_get_next_index(lttng_live_msg_iter
, lttng_live_stream
,
393 if (ret
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
396 BT_ASSERT_DBG(lttng_live_stream
->state
!= LTTNG_LIVE_STREAM_EOF
);
397 if (lttng_live_stream
->state
== LTTNG_LIVE_STREAM_QUIESCENT
) {
398 uint64_t last_inact_ts
= lttng_live_stream
->last_inactivity_ts
,
399 curr_inact_ts
= lttng_live_stream
->current_inactivity_ts
;
401 if (orig_state
== LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA
&&
402 last_inact_ts
== curr_inact_ts
) {
403 ret
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
404 LTTNG_LIVE_LOGD_STREAM_ITER(lttng_live_stream
);
406 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
410 lttng_live_stream
->base_offset
= index
.offset
;
411 lttng_live_stream
->offset
= index
.offset
;
412 lttng_live_stream
->len
= index
.packet_size
/ CHAR_BIT
;
414 if (ret
== LTTNG_LIVE_ITERATOR_STATUS_OK
) {
415 ret
= lttng_live_iterator_next_check_stream_state(lttng_live_stream
);
421 * Creation of the message requires the ctf trace class to be created
422 * beforehand, but the live protocol gives us all streams (including metadata)
423 * at once. So we split it in three steps: getting streams, getting metadata
424 * (which creates the ctf trace class), and then creating the per-stream
428 enum lttng_live_iterator_status
lttng_live_get_session(
429 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
430 struct lttng_live_session
*session
)
432 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
433 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
434 enum lttng_live_iterator_status status
;
437 BT_COMP_LOGD("Updating all streams for session: "
438 "session-id=%"PRIu64
", session-name=\"%s\"",
439 session
->id
, session
->session_name
->str
);
441 if (!session
->attached
) {
442 enum lttng_live_viewer_status attach_status
=
443 lttng_live_session_attach(session
,
444 lttng_live_msg_iter
->self_msg_iter
);
445 if (attach_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
446 if (lttng_live_graph_is_canceled(lttng_live_msg_iter
)) {
448 * Clear any causes appended in
449 * `lttng_live_attach_session()` as we want to
450 * return gracefully since the graph was
453 bt_current_thread_clear_error();
454 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
456 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
457 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
458 "Error attaching to LTTng live session");
464 status
= lttng_live_session_get_new_streams(session
,
465 lttng_live_msg_iter
->self_msg_iter
);
466 if (status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
&&
467 status
!= LTTNG_LIVE_ITERATOR_STATUS_END
) {
471 while (trace_idx
< session
->traces
->len
) {
472 struct lttng_live_trace
*trace
=
473 g_ptr_array_index(session
->traces
, trace_idx
);
475 status
= lttng_live_metadata_update(trace
);
477 case LTTNG_LIVE_ITERATOR_STATUS_END
:
478 case LTTNG_LIVE_ITERATOR_STATUS_OK
:
481 case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
:
482 case LTTNG_LIVE_ITERATOR_STATUS_AGAIN
:
485 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
486 "Error updating trace metadata: "
487 "stream-iter-status=%s, trace-id=%"PRIu64
,
488 lttng_live_iterator_status_string(status
),
493 status
= lttng_live_lazy_msg_init(session
,
494 lttng_live_msg_iter
->self_msg_iter
);
501 void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter
*lttng_live_msg_iter
)
503 uint64_t session_idx
, trace_idx
;
505 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
;
507 struct lttng_live_session
*session
=
508 g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
509 session
->new_streams_needed
= true;
510 for (trace_idx
= 0; trace_idx
< session
->traces
->len
;
512 struct lttng_live_trace
*trace
=
513 g_ptr_array_index(session
->traces
, trace_idx
);
515 BT_ASSERT(trace
->metadata_stream_state
!=
516 LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED
);
518 trace
->metadata_stream_state
= LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
;
524 enum lttng_live_iterator_status
525 lttng_live_iterator_handle_new_streams_and_metadata(
526 struct lttng_live_msg_iter
*lttng_live_msg_iter
)
528 enum lttng_live_iterator_status status
;
529 enum lttng_live_viewer_status viewer_status
;
530 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
531 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
532 uint64_t session_idx
= 0, nr_sessions_opened
= 0;
533 struct lttng_live_session
*session
;
534 enum session_not_found_action sess_not_found_act
=
535 lttng_live_msg_iter
->lttng_live_comp
->params
.sess_not_found_act
;
537 BT_COMP_LOGD("Update data and metadata of all sessions"
538 "live-msg-iter-addr=%p", lttng_live_msg_iter
);
540 * In a remotely distant future, we could add a "new
541 * session" flag to the protocol, which would tell us that we
542 * need to query for new sessions even though we have sessions
545 if (lttng_live_msg_iter
->sessions
->len
== 0) {
546 if (sess_not_found_act
!= SESSION_NOT_FOUND_ACTION_CONTINUE
) {
547 BT_COMP_LOGD("No session found. Exiting in accordance with the `session-not-found-action` parameter");
548 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
551 BT_COMP_LOGD("No session found. Try creating a new one in accordance with the `session-not-found-action` parameter");
553 * Retry to create a viewer session for the requested
556 viewer_status
= lttng_live_create_viewer_session(lttng_live_msg_iter
);
557 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
558 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
559 status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
560 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
561 "Error creating LTTng live viewer session");
562 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
563 status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
572 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
;
574 session
= g_ptr_array_index(lttng_live_msg_iter
->sessions
,
576 status
= lttng_live_get_session(lttng_live_msg_iter
, session
);
578 case LTTNG_LIVE_ITERATOR_STATUS_OK
:
580 case LTTNG_LIVE_ITERATOR_STATUS_END
:
581 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
586 if (!session
->closed
) {
587 nr_sessions_opened
++;
591 if (sess_not_found_act
!= SESSION_NOT_FOUND_ACTION_CONTINUE
&&
592 nr_sessions_opened
== 0) {
593 status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
595 status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
603 enum lttng_live_iterator_status
emit_inactivity_message(
604 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
605 struct lttng_live_stream_iterator
*stream_iter
,
606 const bt_message
**message
, uint64_t timestamp
)
608 enum lttng_live_iterator_status ret
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
609 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
610 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
611 bt_message
*msg
= NULL
;
613 BT_ASSERT(stream_iter
->trace
->clock_class
);
615 msg
= bt_message_message_iterator_inactivity_create(
616 lttng_live_msg_iter
->self_msg_iter
,
617 stream_iter
->trace
->clock_class
, timestamp
);
619 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
620 "Error emitting message iterator inactivity message");
629 ret
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
630 bt_message_put_ref(msg
);
635 enum lttng_live_iterator_status
lttng_live_iterator_next_handle_one_quiescent_stream(
636 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
637 struct lttng_live_stream_iterator
*lttng_live_stream
,
638 const bt_message
**message
)
640 enum lttng_live_iterator_status ret
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
642 if (lttng_live_stream
->state
!= LTTNG_LIVE_STREAM_QUIESCENT
) {
643 return LTTNG_LIVE_ITERATOR_STATUS_OK
;
646 if (lttng_live_stream
->current_inactivity_ts
==
647 lttng_live_stream
->last_inactivity_ts
) {
648 lttng_live_stream
->state
= LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA
;
649 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
653 ret
= emit_inactivity_message(lttng_live_msg_iter
, lttng_live_stream
,
654 message
, lttng_live_stream
->current_inactivity_ts
);
656 lttng_live_stream
->last_inactivity_ts
=
657 lttng_live_stream
->current_inactivity_ts
;
663 int live_get_msg_ts_ns(struct lttng_live_stream_iterator
*stream_iter
,
664 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
665 const bt_message
*msg
, int64_t last_msg_ts_ns
,
668 const bt_clock_class
*clock_class
= NULL
;
669 const bt_clock_snapshot
*clock_snapshot
= NULL
;
671 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
672 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
675 BT_ASSERT_DBG(ts_ns
);
677 BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, "
678 "last-msg-ts=%" PRId64
, lttng_live_msg_iter
, msg
,
681 switch (bt_message_get_type(msg
)) {
682 case BT_MESSAGE_TYPE_EVENT
:
683 clock_class
= bt_message_event_borrow_stream_class_default_clock_class_const(
685 BT_ASSERT_DBG(clock_class
);
687 clock_snapshot
= bt_message_event_borrow_default_clock_snapshot_const(
690 case BT_MESSAGE_TYPE_PACKET_BEGINNING
:
691 clock_class
= bt_message_packet_beginning_borrow_stream_class_default_clock_class_const(
693 BT_ASSERT(clock_class
);
695 clock_snapshot
= bt_message_packet_beginning_borrow_default_clock_snapshot_const(
698 case BT_MESSAGE_TYPE_PACKET_END
:
699 clock_class
= bt_message_packet_end_borrow_stream_class_default_clock_class_const(
701 BT_ASSERT(clock_class
);
703 clock_snapshot
= bt_message_packet_end_borrow_default_clock_snapshot_const(
706 case BT_MESSAGE_TYPE_DISCARDED_EVENTS
:
707 clock_class
= bt_message_discarded_events_borrow_stream_class_default_clock_class_const(
709 BT_ASSERT(clock_class
);
711 clock_snapshot
= bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const(
714 case BT_MESSAGE_TYPE_DISCARDED_PACKETS
:
715 clock_class
= bt_message_discarded_packets_borrow_stream_class_default_clock_class_const(
717 BT_ASSERT(clock_class
);
719 clock_snapshot
= bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const(
722 case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY
:
723 clock_snapshot
= bt_message_message_iterator_inactivity_borrow_clock_snapshot_const(
727 /* All the other messages have a higher priority */
728 BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp.");
729 *ts_ns
= last_msg_ts_ns
;
733 clock_class
= bt_clock_snapshot_borrow_clock_class_const(clock_snapshot
);
734 BT_ASSERT_DBG(clock_class
);
736 ret
= bt_clock_snapshot_get_ns_from_origin(clock_snapshot
, ts_ns
);
738 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
739 "Cannot get nanoseconds from Epoch of clock snapshot: "
740 "clock-snapshot-addr=%p", clock_snapshot
);
751 BT_COMP_LOGD("Found message's timestamp: "
752 "iter-data-addr=%p, msg-addr=%p, "
753 "last-msg-ts=%" PRId64
", ts=%" PRId64
,
754 lttng_live_msg_iter
, msg
, last_msg_ts_ns
, *ts_ns
);
761 enum lttng_live_iterator_status
lttng_live_iterator_next_handle_one_active_data_stream(
762 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
763 struct lttng_live_stream_iterator
*lttng_live_stream
,
764 const bt_message
**message
)
766 enum lttng_live_iterator_status ret
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
767 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
768 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
769 enum ctf_msg_iter_status status
;
770 uint64_t session_idx
, trace_idx
;
772 for (session_idx
= 0; session_idx
< lttng_live_msg_iter
->sessions
->len
;
774 struct lttng_live_session
*session
=
775 g_ptr_array_index(lttng_live_msg_iter
->sessions
, session_idx
);
777 if (session
->new_streams_needed
) {
778 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
781 for (trace_idx
= 0; trace_idx
< session
->traces
->len
;
783 struct lttng_live_trace
*trace
=
784 g_ptr_array_index(session
->traces
, trace_idx
);
785 if (trace
->metadata_stream_state
== LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED
) {
786 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
792 if (lttng_live_stream
->state
!= LTTNG_LIVE_STREAM_ACTIVE_DATA
) {
793 ret
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
794 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
795 "Invalid state of live stream iterator"
796 "stream-iter-status=%s",
797 lttng_live_stream_state_string(lttng_live_stream
->state
));
801 status
= ctf_msg_iter_get_next_message(
802 lttng_live_stream
->msg_iter
, message
);
804 case CTF_MSG_ITER_STATUS_EOF
:
805 ret
= LTTNG_LIVE_ITERATOR_STATUS_END
;
807 case CTF_MSG_ITER_STATUS_OK
:
808 ret
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
810 case CTF_MSG_ITER_STATUS_AGAIN
:
812 * Continue immediately (end of packet). The next
813 * get_index may return AGAIN to delay the following
816 ret
= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
;
818 case CTF_MSG_ITER_STATUS_ERROR
:
820 ret
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
821 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
822 "CTF message iterator failed to get next message: "
823 "msg-iter=%p, msg-iter-status=%s",
824 lttng_live_stream
->msg_iter
,
825 ctf_msg_iter_status_string(status
));
834 enum lttng_live_iterator_status
lttng_live_iterator_close_stream(
835 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
836 struct lttng_live_stream_iterator
*stream_iter
,
837 const bt_message
**curr_msg
)
839 enum lttng_live_iterator_status live_status
=
840 LTTNG_LIVE_ITERATOR_STATUS_OK
;
841 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
842 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
844 * The viewer has hung up on us so we are closing the stream. The
845 * `ctf_msg_iter` should simply realize that it needs to close the
846 * stream properly by emitting the necessary stream end message.
848 enum ctf_msg_iter_status status
= ctf_msg_iter_get_next_message(
849 stream_iter
->msg_iter
, curr_msg
);
851 if (status
== CTF_MSG_ITER_STATUS_ERROR
) {
852 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
853 "Error getting the next message from CTF message iterator");
854 live_status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
856 } else if (status
== CTF_MSG_ITER_STATUS_EOF
) {
857 BT_COMP_LOGI("Reached the end of the live stream iterator.");
858 live_status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
862 BT_ASSERT(status
== CTF_MSG_ITER_STATUS_OK
);
870 * handle_no_data_streams()
872 * - for each ACTIVE_NO_DATA stream:
873 * - query relayd for stream data, or quiescence info.
874 * - if need metadata, get metadata, goto retry.
875 * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry
876 * - if quiescent, move to QUIESCENT streams
877 * - if fetched data, move to ACTIVE_DATA streams
878 * (at this point each stream either has data, or is quiescent)
882 * handle_new_streams_and_metadata()
883 * - query relayd for known streams, add them as ACTIVE_NO_DATA
884 * - query relayd for metadata
886 * call handle_active_no_data_streams()
888 * handle_quiescent_streams()
889 * - if at least one stream is ACTIVE_DATA:
890 * - peek stream event with lowest timestamp -> next_ts
891 * - for each quiescent stream
892 * - if next_ts >= quiescent end
893 * - set state to ACTIVE_NO_DATA
895 * - for each quiescent stream
896 * - set state to ACTIVE_NO_DATA
898 * call handle_active_no_data_streams()
900 * handle_active_data_streams()
901 * - if at least one stream is ACTIVE_DATA:
902 * - get stream event with lowest timestamp from heap
903 * - make that stream event the current message.
904 * - move this stream heap position to its next event
905 * - if we need to fetch data from relayd, move
906 * stream to ACTIVE_NO_DATA.
910 * end criterion: ctrl-c on client. If relayd exits or the session
911 * closes on the relay daemon side, we keep on waiting for streams.
912 * Eventually handle --end timestamp (also an end criterion).
914 * When disconnected from relayd: try to re-connect endlessly.
917 enum lttng_live_iterator_status
lttng_live_iterator_next_msg_on_stream(
918 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
919 struct lttng_live_stream_iterator
*stream_iter
,
920 const bt_message
**curr_msg
)
922 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
923 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
924 enum lttng_live_iterator_status live_status
;
926 BT_COMP_LOGD("Finding the next message for stream iterator: "
927 "stream-name=\"%s\"", stream_iter
->name
->str
);
929 if (stream_iter
->has_stream_hung_up
) {
931 * The stream has hung up and the stream was properly closed
932 * during the last call to the current function. Return _END
933 * status now so that this stream iterator is removed for the
934 * stream iterator list.
936 live_status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
941 LTTNG_LIVE_LOGD_STREAM_ITER(stream_iter
);
942 live_status
= lttng_live_iterator_handle_new_streams_and_metadata(
943 lttng_live_msg_iter
);
944 if (live_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
947 live_status
= lttng_live_iterator_next_handle_one_no_data_stream(
948 lttng_live_msg_iter
, stream_iter
);
950 if (live_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
951 if (live_status
== LTTNG_LIVE_ITERATOR_STATUS_END
) {
953 * We overwrite `live_status` since `curr_msg` is
954 * likely set to a valid message in this function.
956 live_status
= lttng_live_iterator_close_stream(
957 lttng_live_msg_iter
, stream_iter
, curr_msg
);
961 live_status
= lttng_live_iterator_next_handle_one_quiescent_stream(
962 lttng_live_msg_iter
, stream_iter
, curr_msg
);
963 if (live_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
964 BT_ASSERT(!*curr_msg
);
970 live_status
= lttng_live_iterator_next_handle_one_active_data_stream(
971 lttng_live_msg_iter
, stream_iter
, curr_msg
);
972 if (live_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
973 BT_ASSERT(!*curr_msg
);
977 if (live_status
== LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
) {
985 enum lttng_live_iterator_status
next_stream_iterator_for_trace(
986 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
987 struct lttng_live_trace
*live_trace
,
988 struct lttng_live_stream_iterator
**youngest_trace_stream_iter
)
990 struct lttng_live_stream_iterator
*youngest_candidate_stream_iter
= NULL
;
991 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
992 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
993 enum lttng_live_iterator_status stream_iter_status
;;
994 int64_t youngest_candidate_msg_ts
= INT64_MAX
;
995 uint64_t stream_iter_idx
;
997 BT_ASSERT_DBG(live_trace
);
998 BT_ASSERT_DBG(live_trace
->stream_iterators
);
1000 BT_COMP_LOGD("Finding the next stream iterator for trace: "
1001 "trace-id=%"PRIu64
, live_trace
->id
);
1003 * Update the current message of every stream iterators of this trace.
1004 * The current msg of every stream must have a timestamp equal or
1005 * larger than the last message returned by this iterator. We must
1006 * ensure monotonicity.
1008 stream_iter_idx
= 0;
1009 while (stream_iter_idx
< live_trace
->stream_iterators
->len
) {
1010 bool stream_iter_is_ended
= false;
1011 struct lttng_live_stream_iterator
*stream_iter
=
1012 g_ptr_array_index(live_trace
->stream_iterators
,
1016 * Find if there is are now current message for this stream
1019 while (!stream_iter
->current_msg
) {
1020 const bt_message
*msg
= NULL
;
1021 int64_t curr_msg_ts_ns
= INT64_MAX
;
1022 stream_iter_status
= lttng_live_iterator_next_msg_on_stream(
1023 lttng_live_msg_iter
, stream_iter
, &msg
);
1025 BT_COMP_LOGD("live stream iterator returned status :%s",
1026 lttng_live_iterator_status_string(stream_iter_status
));
1027 if (stream_iter_status
== LTTNG_LIVE_ITERATOR_STATUS_END
) {
1028 stream_iter_is_ended
= true;
1032 if (stream_iter_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
1039 * Get the timestamp in nanoseconds from origin of this
1042 live_get_msg_ts_ns(stream_iter
, lttng_live_msg_iter
,
1043 msg
, lttng_live_msg_iter
->last_msg_ts_ns
,
1047 * Check if the message of the current live stream
1048 * iterator occurred at the exact same time or after the
1049 * last message returned by this component's message
1050 * iterator. If not, we return an error.
1052 if (curr_msg_ts_ns
>= lttng_live_msg_iter
->last_msg_ts_ns
) {
1053 stream_iter
->current_msg
= msg
;
1054 stream_iter
->current_msg_ts_ns
= curr_msg_ts_ns
;
1057 * We received a message in the past. To ensure
1058 * monotonicity, we can't send it forward.
1060 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1061 "Message's timestamp is less than "
1062 "lttng-live's message iterator's last "
1063 "returned timestamp: "
1064 "lttng-live-msg-iter-addr=%p, ts=%" PRId64
", "
1065 "last-msg-ts=%" PRId64
,
1066 lttng_live_msg_iter
, curr_msg_ts_ns
,
1067 lttng_live_msg_iter
->last_msg_ts_ns
);
1068 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_ERROR
;
1073 BT_ASSERT_DBG(stream_iter
!= youngest_candidate_stream_iter
);
1075 if (!stream_iter_is_ended
) {
1076 if (G_UNLIKELY(youngest_candidate_stream_iter
== NULL
) ||
1077 stream_iter
->current_msg_ts_ns
< youngest_candidate_msg_ts
) {
1079 * Update the current best candidate message
1080 * for the stream iterator of this live trace
1081 * to be forwarded downstream.
1083 youngest_candidate_msg_ts
= stream_iter
->current_msg_ts_ns
;
1084 youngest_candidate_stream_iter
= stream_iter
;
1085 } else if (stream_iter
->current_msg_ts_ns
== youngest_candidate_msg_ts
) {
1087 * Order the messages in an arbitrary but
1088 * deterministic way.
1090 BT_ASSERT_DBG(stream_iter
!= youngest_candidate_stream_iter
);
1091 int ret
= common_muxing_compare_messages(
1092 stream_iter
->current_msg
,
1093 youngest_candidate_stream_iter
->current_msg
);
1096 * The `youngest_candidate_stream_iter->current_msg`
1097 * should go first. Update the next
1098 * iterator and the current timestamp.
1100 youngest_candidate_msg_ts
= stream_iter
->current_msg_ts_ns
;
1101 youngest_candidate_stream_iter
= stream_iter
;
1102 } else if (ret
== 0) {
1104 * Unable to pick which one should go
1107 BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: "
1108 "stream-iter-addr=%p"
1109 "stream-iter-addr=%p",
1111 youngest_candidate_stream_iter
);
1118 * The live stream iterator has ended. That
1119 * iterator is removed from the array, but
1120 * there is no need to increment
1121 * stream_iter_idx as
1122 * g_ptr_array_remove_index_fast replaces the
1123 * removed element with the array's last
1126 g_ptr_array_remove_index_fast(
1127 live_trace
->stream_iterators
,
1132 if (youngest_candidate_stream_iter
) {
1133 *youngest_trace_stream_iter
= youngest_candidate_stream_iter
;
1134 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1137 * The only case where we don't have a candidate for this trace
1138 * is if we reached the end of all the iterators.
1140 BT_ASSERT(live_trace
->stream_iterators
->len
== 0);
1141 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1145 return stream_iter_status
;
1149 enum lttng_live_iterator_status
next_stream_iterator_for_session(
1150 struct lttng_live_msg_iter
*lttng_live_msg_iter
,
1151 struct lttng_live_session
*session
,
1152 struct lttng_live_stream_iterator
**youngest_session_stream_iter
)
1154 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
1155 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
1156 enum lttng_live_iterator_status stream_iter_status
;
1157 uint64_t trace_idx
= 0;
1158 int64_t youngest_candidate_msg_ts
= INT64_MAX
;
1159 struct lttng_live_stream_iterator
*youngest_candidate_stream_iter
= NULL
;
1161 BT_COMP_LOGD("Finding the next stream iterator for session: "
1162 "session-id=%"PRIu64
, session
->id
);
1164 * Make sure we are attached to the session and look for new streams
1167 stream_iter_status
= lttng_live_get_session(lttng_live_msg_iter
, session
);
1168 if (stream_iter_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
&&
1169 stream_iter_status
!= LTTNG_LIVE_ITERATOR_STATUS_CONTINUE
&&
1170 stream_iter_status
!= LTTNG_LIVE_ITERATOR_STATUS_END
) {
1174 BT_ASSERT_DBG(session
->traces
);
1176 while (trace_idx
< session
->traces
->len
) {
1177 bool trace_is_ended
= false;
1178 struct lttng_live_stream_iterator
*stream_iter
;
1179 struct lttng_live_trace
*trace
=
1180 g_ptr_array_index(session
->traces
, trace_idx
);
1182 stream_iter_status
= next_stream_iterator_for_trace(
1183 lttng_live_msg_iter
, trace
, &stream_iter
);
1184 if (stream_iter_status
== LTTNG_LIVE_ITERATOR_STATUS_END
) {
1186 * All the live stream iterators for this trace are
1187 * ENDed. Remove the trace from this session.
1189 trace_is_ended
= true;
1190 } else if (stream_iter_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
1194 if (!trace_is_ended
) {
1195 BT_ASSERT_DBG(stream_iter
);
1197 if (G_UNLIKELY(youngest_candidate_stream_iter
== NULL
) ||
1198 stream_iter
->current_msg_ts_ns
< youngest_candidate_msg_ts
) {
1199 youngest_candidate_msg_ts
= stream_iter
->current_msg_ts_ns
;
1200 youngest_candidate_stream_iter
= stream_iter
;
1201 } else if (stream_iter
->current_msg_ts_ns
== youngest_candidate_msg_ts
) {
1203 * Order the messages in an arbitrary but
1204 * deterministic way.
1206 int ret
= common_muxing_compare_messages(
1207 stream_iter
->current_msg
,
1208 youngest_candidate_stream_iter
->current_msg
);
1211 * The `youngest_candidate_stream_iter->current_msg`
1212 * should go first. Update the next iterator
1213 * and the current timestamp.
1215 youngest_candidate_msg_ts
= stream_iter
->current_msg_ts_ns
;
1216 youngest_candidate_stream_iter
= stream_iter
;
1217 } else if (ret
== 0) {
1218 /* Unable to pick which one should go first. */
1219 BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: "
1220 "stream-iter-addr=%p" "stream-iter-addr=%p",
1221 stream_iter
, youngest_candidate_stream_iter
);
1227 * trace_idx is not incremented since
1228 * g_ptr_array_remove_index_fast replaces the
1229 * element at trace_idx with the array's last element.
1231 g_ptr_array_remove_index_fast(session
->traces
,
1235 if (youngest_candidate_stream_iter
) {
1236 *youngest_session_stream_iter
= youngest_candidate_stream_iter
;
1237 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1240 * The only cases where we don't have a candidate for this
1242 * 1. if we reached the end of all the iterators of all the
1243 * traces of this session,
1244 * 2. if we never had live stream iterator in the first place.
1246 * In either cases, we return END.
1248 BT_ASSERT(session
->traces
->len
== 0);
1249 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_END
;
1252 return stream_iter_status
;
1256 void put_messages(bt_message_array_const msgs
, uint64_t count
)
1260 for (i
= 0; i
< count
; i
++) {
1261 BT_MESSAGE_PUT_REF_AND_RESET(msgs
[i
]);
1266 bt_message_iterator_class_next_method_status
lttng_live_msg_iter_next(
1267 bt_self_message_iterator
*self_msg_it
,
1268 bt_message_array_const msgs
, uint64_t capacity
,
1271 bt_message_iterator_class_next_method_status status
;
1272 enum lttng_live_viewer_status viewer_status
;
1273 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1274 bt_self_message_iterator_get_data(self_msg_it
);
1275 struct lttng_live_component
*lttng_live
=
1276 lttng_live_msg_iter
->lttng_live_comp
;
1277 bt_self_component
*self_comp
= lttng_live_msg_iter
->self_comp
;
1278 bt_logging_level log_level
= lttng_live_msg_iter
->log_level
;
1279 enum lttng_live_iterator_status stream_iter_status
;
1280 uint64_t session_idx
;
1284 BT_ASSERT_DBG(lttng_live_msg_iter
);
1286 if (G_UNLIKELY(lttng_live_msg_iter
->was_interrupted
)) {
1288 * The iterator was interrupted in a previous call to the
1289 * `_next()` method. We currently do not support generating
1290 * messages after such event. The babeltrace2 CLI should never
1291 * be running the graph after being interrupted. So this check
1292 * is to prevent other graph users from using this live
1293 * iterator in an messed up internal state.
1295 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR
;
1296 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1297 "Message iterator was interrupted during a previous call to the `next()` and currently does not support continuing after such event.");
1302 * Clear all the invalid message reference that might be left over in
1305 memset(msgs
, 0, capacity
* sizeof(*msgs
));
1308 * If no session are exposed on the relay found at the url provided by
1309 * the user, session count will be 0. In this case, we return status
1310 * end to return gracefully.
1312 if (lttng_live_msg_iter
->sessions
->len
== 0) {
1313 if (lttng_live
->params
.sess_not_found_act
!=
1314 SESSION_NOT_FOUND_ACTION_CONTINUE
) {
1315 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END
;
1319 * The are no more active session for this session
1320 * name. Retry to create a viewer session for the
1321 * requested session name.
1323 viewer_status
= lttng_live_create_viewer_session(lttng_live_msg_iter
);
1324 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1325 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1326 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR
;
1327 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1328 "Error creating LTTng live viewer session");
1329 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1330 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN
;
1339 if (lttng_live_msg_iter
->active_stream_iter
== 0) {
1340 lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter
);
1344 * Here the muxing of message is done.
1346 * We need to iterate over all the streams of all the traces of all the
1347 * viewer sessions in order to get the message with the smallest
1348 * timestamp. In this case, a session is a viewer session and there is
1349 * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or
1350 * kernel). Each viewer session can have multiple traces, for example,
1351 * 64bit UST viewer sessions could have multiple per-pid traces.
1353 * We iterate over the streams of each traces to update and see what is
1354 * their next message's timestamp. From those timestamps, we select the
1355 * message with the smallest timestamp as the best candidate message
1356 * for that trace and do the same thing across all the sessions.
1358 * We then compare the timestamp of best candidate message of all the
1359 * sessions to pick the message with the smallest timestamp and we
1362 while (*count
< capacity
) {
1363 struct lttng_live_stream_iterator
*youngest_stream_iter
= NULL
,
1364 *candidate_stream_iter
= NULL
;
1365 int64_t youngest_msg_ts_ns
= INT64_MAX
;
1367 BT_ASSERT_DBG(lttng_live_msg_iter
->sessions
);
1369 while (session_idx
< lttng_live_msg_iter
->sessions
->len
) {
1370 struct lttng_live_session
*session
=
1371 g_ptr_array_index(lttng_live_msg_iter
->sessions
,
1374 /* Find the best candidate message to send downstream. */
1375 stream_iter_status
= next_stream_iterator_for_session(
1376 lttng_live_msg_iter
, session
,
1377 &candidate_stream_iter
);
1379 /* If we receive an END status, it means that either:
1380 * - Those traces never had active streams (UST with no
1381 * data produced yet),
1382 * - All live stream iterators have ENDed.*/
1383 if (stream_iter_status
== LTTNG_LIVE_ITERATOR_STATUS_END
) {
1384 if (session
->closed
&& session
->traces
->len
== 0) {
1386 * Remove the session from the list.
1387 * session_idx is not modified since
1388 * g_ptr_array_remove_index_fast
1389 * replaces the the removed element with
1390 * the array's last element.
1392 g_ptr_array_remove_index_fast(
1393 lttng_live_msg_iter
->sessions
,
1401 if (stream_iter_status
!= LTTNG_LIVE_ITERATOR_STATUS_OK
) {
1405 if (G_UNLIKELY(youngest_stream_iter
== NULL
) ||
1406 candidate_stream_iter
->current_msg_ts_ns
< youngest_msg_ts_ns
) {
1407 youngest_msg_ts_ns
= candidate_stream_iter
->current_msg_ts_ns
;
1408 youngest_stream_iter
= candidate_stream_iter
;
1409 } else if (candidate_stream_iter
->current_msg_ts_ns
== youngest_msg_ts_ns
) {
1411 * The currently selected message to be sent
1412 * downstream next has the exact same timestamp
1413 * that of the current candidate message. We
1414 * must break the tie in a predictable manner.
1416 BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically.");
1418 * Order the messages in an arbitrary but
1419 * deterministic way.
1421 int ret
= common_muxing_compare_messages(
1422 candidate_stream_iter
->current_msg
,
1423 youngest_stream_iter
->current_msg
);
1426 * The `candidate_stream_iter->current_msg`
1427 * should go first. Update the next
1428 * iterator and the current timestamp.
1430 youngest_msg_ts_ns
= candidate_stream_iter
->current_msg_ts_ns
;
1431 youngest_stream_iter
= candidate_stream_iter
;
1432 } else if (ret
== 0) {
1433 /* Unable to pick which one should go first. */
1434 BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: "
1435 "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p",
1436 youngest_stream_iter
, candidate_stream_iter
);
1443 if (!youngest_stream_iter
) {
1444 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_AGAIN
;
1448 BT_ASSERT_DBG(youngest_stream_iter
->current_msg
);
1449 /* Ensure monotonicity. */
1450 BT_ASSERT_DBG(lttng_live_msg_iter
->last_msg_ts_ns
<=
1451 youngest_stream_iter
->current_msg_ts_ns
);
1454 * Insert the next message to the message batch. This will set
1455 * stream iterator current messsage to NULL so that next time
1456 * we fetch the next message of that stream iterator
1458 BT_MESSAGE_MOVE_REF(msgs
[*count
], youngest_stream_iter
->current_msg
);
1461 /* Update the last timestamp in nanoseconds sent downstream. */
1462 lttng_live_msg_iter
->last_msg_ts_ns
= youngest_msg_ts_ns
;
1463 youngest_stream_iter
->current_msg_ts_ns
= INT64_MAX
;
1465 stream_iter_status
= LTTNG_LIVE_ITERATOR_STATUS_OK
;
1469 switch (stream_iter_status
) {
1470 case LTTNG_LIVE_ITERATOR_STATUS_OK
:
1471 case LTTNG_LIVE_ITERATOR_STATUS_AGAIN
:
1473 * If we gathered messages, return _OK even if the graph was
1474 * interrupted. This allows for the components downstream to at
1475 * least get the thoses messages. If the graph was indeed
1476 * interrupted there should not be another _next() call as the
1477 * application will tear down the graph. This component class
1478 * doesn't support restarting after an interruption.
1481 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_OK
;
1483 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN
;
1486 case LTTNG_LIVE_ITERATOR_STATUS_END
:
1487 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END
;
1489 case LTTNG_LIVE_ITERATOR_STATUS_NOMEM
:
1490 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1491 "Memory error preparing the next batch of messages: "
1492 "live-iter-status=%s",
1493 lttng_live_iterator_status_string(stream_iter_status
));
1494 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_MEMORY_ERROR
;
1496 case LTTNG_LIVE_ITERATOR_STATUS_ERROR
:
1497 case LTTNG_LIVE_ITERATOR_STATUS_INVAL
:
1498 case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED
:
1499 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1500 "Error preparing the next batch of messages: "
1501 "live-iter-status=%s",
1502 lttng_live_iterator_status_string(stream_iter_status
));
1504 status
= BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR
;
1505 /* Put all existing messages on error. */
1506 put_messages(msgs
, *count
);
1517 struct lttng_live_msg_iter
*lttng_live_msg_iter_create(
1518 struct lttng_live_component
*lttng_live_comp
,
1519 bt_self_message_iterator
*self_msg_it
)
1521 bt_self_component
*self_comp
= lttng_live_comp
->self_comp
;
1522 bt_logging_level log_level
= lttng_live_comp
->log_level
;
1524 struct lttng_live_msg_iter
*lttng_live_msg_iter
=
1525 g_new0(struct lttng_live_msg_iter
, 1);
1526 if (!lttng_live_msg_iter
) {
1527 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1528 "Failed to allocate lttng_live_msg_iter");
1532 lttng_live_msg_iter
->log_level
= lttng_live_comp
->log_level
;
1533 lttng_live_msg_iter
->self_comp
= lttng_live_comp
->self_comp
;
1534 lttng_live_msg_iter
->lttng_live_comp
= lttng_live_comp
;
1535 lttng_live_msg_iter
->self_msg_iter
= self_msg_it
;
1537 lttng_live_msg_iter
->active_stream_iter
= 0;
1538 lttng_live_msg_iter
->last_msg_ts_ns
= INT64_MIN
;
1539 lttng_live_msg_iter
->was_interrupted
= false;
1541 lttng_live_msg_iter
->sessions
= g_ptr_array_new_with_free_func(
1542 (GDestroyNotify
) lttng_live_destroy_session
);
1543 BT_ASSERT(lttng_live_msg_iter
->sessions
);
1546 return lttng_live_msg_iter
;
1551 bt_message_iterator_class_initialize_method_status
lttng_live_msg_iter_init(
1552 bt_self_message_iterator
*self_msg_it
,
1553 bt_self_message_iterator_configuration
*config
,
1554 bt_self_component_port_output
*self_port
)
1556 bt_message_iterator_class_initialize_method_status status
;
1557 struct lttng_live_component
*lttng_live
;
1558 struct lttng_live_msg_iter
*lttng_live_msg_iter
;
1559 enum lttng_live_viewer_status viewer_status
;
1560 bt_logging_level log_level
;
1561 bt_self_component
*self_comp
=
1562 bt_self_message_iterator_borrow_component(self_msg_it
);
1564 lttng_live
= bt_self_component_get_data(self_comp
);
1565 log_level
= lttng_live
->log_level
;
1566 self_comp
= lttng_live
->self_comp
;
1569 /* There can be only one downstream iterator at the same time. */
1570 BT_ASSERT(!lttng_live
->has_msg_iter
);
1571 lttng_live
->has_msg_iter
= true;
1573 lttng_live_msg_iter
= lttng_live_msg_iter_create(lttng_live
,
1575 if (!lttng_live_msg_iter
) {
1576 status
= BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR
;
1577 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1578 "Failed to create lttng_live_msg_iter");
1582 viewer_status
= live_viewer_connection_create(self_comp
, NULL
,
1583 log_level
, lttng_live
->params
.url
->str
, false,
1584 lttng_live_msg_iter
, <tng_live_msg_iter
->viewer_connection
);
1585 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1586 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1587 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1588 "Failed to create viewer connection");
1589 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1591 * Interruption in the _iter_init() method is not
1592 * supported. Return an error.
1594 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1595 "Interrupted while creating viewer connection");
1600 viewer_status
= lttng_live_create_viewer_session(lttng_live_msg_iter
);
1601 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1602 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1603 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1604 "Failed to create viewer session");
1605 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1607 * Interruption in the _iter_init() method is not
1608 * supported. Return an error.
1610 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1611 "Interrupted when creating viewer session");
1616 if (lttng_live_msg_iter
->sessions
->len
== 0) {
1617 switch (lttng_live
->params
.sess_not_found_act
) {
1618 case SESSION_NOT_FOUND_ACTION_CONTINUE
:
1619 BT_COMP_LOGI("Unable to connect to the requested live viewer session. Keep trying to connect because of "
1620 "%s=\"%s\" component parameter: url=\"%s\"",
1621 SESS_NOT_FOUND_ACTION_PARAM
,
1622 SESS_NOT_FOUND_ACTION_CONTINUE_STR
,
1623 lttng_live
->params
.url
->str
);
1625 case SESSION_NOT_FOUND_ACTION_FAIL
:
1626 BT_COMP_LOGE_APPEND_CAUSE(self_comp
,
1627 "Unable to connect to the requested live viewer session. Fail the message iterator initialization because of %s=\"%s\" "
1628 "component parameter: url =\"%s\"",
1629 SESS_NOT_FOUND_ACTION_PARAM
,
1630 SESS_NOT_FOUND_ACTION_FAIL_STR
,
1631 lttng_live
->params
.url
->str
);
1633 case SESSION_NOT_FOUND_ACTION_END
:
1634 BT_COMP_LOGI("Unable to connect to the requested live viewer session. End gracefully at the first _next() "
1635 "call because of %s=\"%s\" component parameter: "
1636 "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM
,
1637 SESS_NOT_FOUND_ACTION_END_STR
,
1638 lttng_live
->params
.url
->str
);
1645 bt_self_message_iterator_set_data(self_msg_it
, lttng_live_msg_iter
);
1646 status
= BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_OK
;
1650 status
= BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
1651 lttng_live_msg_iter_destroy(lttng_live_msg_iter
);
1656 static struct bt_param_validation_map_value_entry_descr list_sessions_params
[] = {
1657 { URL_PARAM
, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY
, { .type
= BT_VALUE_TYPE_STRING
} },
1658 BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
1662 bt_component_class_query_method_status
lttng_live_query_list_sessions(
1663 const bt_value
*params
, const bt_value
**result
,
1664 bt_self_component_class
*self_comp_class
,
1665 bt_logging_level log_level
)
1667 bt_component_class_query_method_status status
;
1668 const bt_value
*url_value
= NULL
;
1670 struct live_viewer_connection
*viewer_connection
= NULL
;
1671 enum lttng_live_viewer_status viewer_status
;
1672 enum bt_param_validation_status validation_status
;
1673 gchar
*validate_error
= NULL
;
1675 validation_status
= bt_param_validation_validate(params
,
1676 list_sessions_params
, &validate_error
);
1677 if (validation_status
== BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR
) {
1678 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
1680 } else if (validation_status
== BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR
) {
1681 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
1682 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
, "%s",
1687 url_value
= bt_value_map_borrow_entry_value_const(params
, URL_PARAM
);
1688 url
= bt_value_string_get(url_value
);
1690 viewer_status
= live_viewer_connection_create(NULL
, self_comp_class
,
1691 log_level
, url
, true, NULL
, &viewer_connection
);
1692 if (viewer_status
!= LTTNG_LIVE_VIEWER_STATUS_OK
) {
1693 if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_ERROR
) {
1694 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
1695 "Failed to create viewer connection");
1696 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
1697 } else if (viewer_status
== LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED
) {
1698 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN
;
1705 status
= live_viewer_connection_list_sessions(viewer_connection
,
1707 if (status
!= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
) {
1708 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
1709 "Failed to list viewer sessions");
1716 BT_VALUE_PUT_REF_AND_RESET(*result
);
1719 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
1723 if (viewer_connection
) {
1724 live_viewer_connection_destroy(viewer_connection
);
1727 g_free(validate_error
);
1733 bt_component_class_query_method_status
lttng_live_query_support_info(
1734 const bt_value
*params
, const bt_value
**result
,
1735 bt_self_component_class
*self_comp_class
,
1736 bt_logging_level log_level
)
1738 bt_component_class_query_method_status status
=
1739 BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
1740 const bt_value
*input_type_value
;
1741 const bt_value
*input_value
;
1743 struct bt_common_lttng_live_url_parts parts
= { 0 };
1745 /* Used by the logging macros */
1746 __attribute__((unused
)) bt_self_component
*self_comp
= NULL
;
1749 input_type_value
= bt_value_map_borrow_entry_value_const(params
,
1751 if (!input_type_value
) {
1752 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
1753 "Missing expected `type` parameter.");
1757 if (!bt_value_is_string(input_type_value
)) {
1758 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
1759 "`type` parameter is not a string value.");
1763 if (strcmp(bt_value_string_get(input_type_value
), "string") != 0) {
1764 /* We don't handle file system paths */
1768 input_value
= bt_value_map_borrow_entry_value_const(params
, "input");
1770 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
1771 "Missing expected `input` parameter.");
1775 if (!bt_value_is_string(input_value
)) {
1776 BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class
,
1777 "`input` parameter is not a string value.");
1781 parts
= bt_common_parse_lttng_live_url(bt_value_string_get(input_value
),
1783 if (parts
.session_name
) {
1785 * Looks pretty much like an LTTng live URL: we got the
1786 * session name part, which forms a complete URL.
1792 *result
= bt_value_real_create_init(weight
);
1794 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR
;
1802 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR
;
1805 BT_ASSERT(!*result
);
1808 bt_common_destroy_lttng_live_url_parts(&parts
);
1813 bt_component_class_query_method_status
lttng_live_query(
1814 bt_self_component_class_source
*comp_class
,
1815 bt_private_query_executor
*priv_query_exec
,
1816 const char *object
, const bt_value
*params
,
1817 __attribute__((unused
)) void *method_data
,
1818 const bt_value
**result
)
1820 bt_component_class_query_method_status status
=
1821 BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK
;
1822 bt_self_component
*self_comp
= NULL
;
1823 bt_self_component_class
*self_comp_class
=
1824 bt_self_component_class_source_as_self_component_class(comp_class
);
1825 bt_logging_level log_level
= bt_query_executor_get_logging_level(
1826 bt_private_query_executor_as_query_executor_const(
1829 if (strcmp(object
, "sessions") == 0) {
1830 status
= lttng_live_query_list_sessions(params
, result
,
1831 self_comp_class
, log_level
);
1832 } else if (strcmp(object
, "babeltrace.support-info") == 0) {
1833 status
= lttng_live_query_support_info(params
, result
,
1834 self_comp_class
, log_level
);
1836 BT_COMP_LOGI("Unknown query object `%s`", object
);
1837 status
= BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT
;
1846 void lttng_live_component_destroy_data(struct lttng_live_component
*lttng_live
)
1851 if (lttng_live
->params
.url
) {
1852 g_string_free(lttng_live
->params
.url
, TRUE
);
1858 void lttng_live_component_finalize(bt_self_component_source
*component
)
1860 void *data
= bt_self_component_get_data(
1861 bt_self_component_source_as_self_component(component
));
1866 lttng_live_component_destroy_data(data
);
1870 enum session_not_found_action
parse_session_not_found_action_param(
1871 const bt_value
*no_session_param
)
1873 enum session_not_found_action action
;
1874 const char *no_session_act_str
= bt_value_string_get(no_session_param
);
1876 if (strcmp(no_session_act_str
, SESS_NOT_FOUND_ACTION_CONTINUE_STR
) == 0) {
1877 action
= SESSION_NOT_FOUND_ACTION_CONTINUE
;
1878 } else if (strcmp(no_session_act_str
, SESS_NOT_FOUND_ACTION_FAIL_STR
) == 0) {
1879 action
= SESSION_NOT_FOUND_ACTION_FAIL
;
1881 BT_ASSERT(strcmp(no_session_act_str
, SESS_NOT_FOUND_ACTION_END_STR
) == 0);
1882 action
= SESSION_NOT_FOUND_ACTION_END
;
1888 static struct bt_param_validation_value_descr inputs_elem_descr
= {
1889 .type
= BT_VALUE_TYPE_STRING
,
1892 static const char *sess_not_found_action_choices
[] = {
1893 SESS_NOT_FOUND_ACTION_CONTINUE_STR
,
1894 SESS_NOT_FOUND_ACTION_FAIL_STR
,
1895 SESS_NOT_FOUND_ACTION_END_STR
,
1898 static struct bt_param_validation_map_value_entry_descr params_descr
[] = {
1899 { INPUTS_PARAM
, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY
, { BT_VALUE_TYPE_ARRAY
, .array
= {
1902 .element_type
= &inputs_elem_descr
,
1904 { SESS_NOT_FOUND_ACTION_PARAM
, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL
, { BT_VALUE_TYPE_STRING
, .string
= {
1905 .choices
= sess_not_found_action_choices
,
1907 BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END
1911 bt_component_class_initialize_method_status
lttng_live_component_create(
1912 const bt_value
*params
,
1913 bt_logging_level log_level
,
1914 bt_self_component
*self_comp
,
1915 struct lttng_live_component
**component
)
1917 struct lttng_live_component
*lttng_live
= NULL
;
1918 const bt_value
*inputs_value
;
1919 const bt_value
*url_value
;
1920 const bt_value
*value
;
1922 enum bt_param_validation_status validation_status
;
1923 gchar
*validation_error
= NULL
;
1924 bt_component_class_initialize_method_status status
;
1926 validation_status
= bt_param_validation_validate(params
, params_descr
,
1928 if (validation_status
== BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR
) {
1929 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR
;
1931 } else if (validation_status
== BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR
) {
1932 BT_COMP_LOGE_APPEND_CAUSE(self_comp
, "%s", validation_error
);
1933 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR
;
1937 lttng_live
= g_new0(struct lttng_live_component
, 1);
1939 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR
;
1942 lttng_live
->log_level
= log_level
;
1943 lttng_live
->self_comp
= self_comp
;
1944 lttng_live
->max_query_size
= MAX_QUERY_SIZE
;
1945 lttng_live
->has_msg_iter
= false;
1948 bt_value_map_borrow_entry_value_const(params
, INPUTS_PARAM
);
1950 bt_value_array_borrow_element_by_index_const(inputs_value
, 0);
1951 url
= bt_value_string_get(url_value
);
1953 lttng_live
->params
.url
= g_string_new(url
);
1954 if (!lttng_live
->params
.url
) {
1955 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR
;
1959 value
= bt_value_map_borrow_entry_value_const(params
,
1960 SESS_NOT_FOUND_ACTION_PARAM
);
1962 lttng_live
->params
.sess_not_found_act
=
1963 parse_session_not_found_action_param(value
);
1965 BT_COMP_LOGI("Optional `%s` parameter is missing: "
1966 "defaulting to `%s`.",
1967 SESS_NOT_FOUND_ACTION_PARAM
,
1968 SESS_NOT_FOUND_ACTION_CONTINUE_STR
);
1969 lttng_live
->params
.sess_not_found_act
=
1970 SESSION_NOT_FOUND_ACTION_CONTINUE
;
1973 status
= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
;
1977 lttng_live_component_destroy_data(lttng_live
);
1980 g_free(validation_error
);
1982 *component
= lttng_live
;
1987 bt_component_class_initialize_method_status
lttng_live_component_init(
1988 bt_self_component_source
*self_comp_src
,
1989 bt_self_component_source_configuration
*config
,
1990 const bt_value
*params
,
1991 __attribute__((unused
)) void *init_method_data
)
1993 struct lttng_live_component
*lttng_live
;
1994 bt_component_class_initialize_method_status ret
;
1995 bt_self_component
*self_comp
=
1996 bt_self_component_source_as_self_component(self_comp_src
);
1997 bt_logging_level log_level
= bt_component_get_logging_level(
1998 bt_self_component_as_component(self_comp
));
1999 bt_self_component_add_port_status add_port_status
;
2001 ret
= lttng_live_component_create(params
, log_level
, self_comp
, <tng_live
);
2002 if (ret
!= BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK
) {
2006 add_port_status
= bt_self_component_source_add_output_port(
2007 self_comp_src
, "out", NULL
, NULL
);
2008 if (add_port_status
!= BT_SELF_COMPONENT_ADD_PORT_STATUS_OK
) {
2009 ret
= (int) add_port_status
;
2013 bt_self_component_set_data(self_comp
, lttng_live
);
2017 lttng_live_component_destroy_data(lttng_live
);