Commit | Line | Data |
---|---|---|
f3bc2010 JG |
1 | /* |
2 | * lttng-live.c | |
3 | * | |
4 | * Babeltrace CTF LTTng-live Client Component | |
5 | * | |
14f28187 | 6 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
f3bc2010 | 7 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
7cdc2bab | 8 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 JG |
9 | * |
10 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
11 | * | |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
25 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
28 | * SOFTWARE. | |
29 | */ | |
30 | ||
2ece7dd0 | 31 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 32 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 33 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE" |
d9c39b0a | 34 | #include "logging/comp-logging.h" |
020bc26f | 35 | |
14f28187 FD |
36 | #include <glib.h> |
37 | #include <inttypes.h> | |
38 | #include <unistd.h> | |
39 | ||
578e048b | 40 | #include "common/assert.h" |
3fadfbc0 | 41 | #include <babeltrace2/babeltrace.h> |
578e048b | 42 | #include "compat/compiler.h" |
3fadfbc0 | 43 | #include <babeltrace2/types.h> |
f3bc2010 | 44 | |
376fc2bd FD |
45 | #include "plugins/common/muxing/muxing.h" |
46 | ||
7cdc2bab MD |
47 | #include "data-stream.h" |
48 | #include "metadata.h" | |
14f28187 | 49 | #include "lttng-live.h" |
7cdc2bab | 50 | |
14f28187 FD |
51 | #define MAX_QUERY_SIZE (256*1024) |
52 | #define URL_PARAM "url" | |
312df793 | 53 | #define INPUTS_PARAM "inputs" |
14f28187 FD |
54 | #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action" |
55 | #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue" | |
56 | #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail" | |
57 | #define SESS_NOT_FOUND_ACTION_END_STR "end" | |
7cdc2bab | 58 | |
2ece7dd0 | 59 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 60 | |
14f28187 FD |
61 | static |
62 | const char *print_live_iterator_status(enum lttng_live_iterator_status status) | |
63 | { | |
64 | switch (status) { | |
65 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
66 | return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE"; | |
67 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
68 | return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN"; | |
69 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
70 | return "LTTNG_LIVE_ITERATOR_STATUS_END"; | |
71 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
72 | return "LTTNG_LIVE_ITERATOR_STATUS_OK"; | |
73 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
74 | return "LTTNG_LIVE_ITERATOR_STATUS_INVAL"; | |
75 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
76 | return "LTTNG_LIVE_ITERATOR_STATUS_ERROR"; | |
77 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
78 | return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM"; | |
79 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
80 | return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED"; | |
81 | default: | |
82 | abort(); | |
83 | } | |
84 | } | |
85 | ||
86 | static | |
87 | const char *print_state(struct lttng_live_stream_iterator *s) | |
7cdc2bab MD |
88 | { |
89 | switch (s->state) { | |
90 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
91 | return "ACTIVE_NO_DATA"; | |
92 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
93 | return "QUIESCENT_NO_DATA"; | |
94 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
95 | return "QUIESCENT"; | |
96 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
97 | return "ACTIVE_DATA"; | |
98 | case LTTNG_LIVE_STREAM_EOF: | |
99 | return "EOF"; | |
100 | default: | |
101 | return "ERROR"; | |
102 | } | |
103 | } | |
7cdc2bab | 104 | |
14f28187 FD |
105 | #define print_stream_state(live_stream_iter) \ |
106 | do { \ | |
2ece7dd0 | 107 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
14f28187 FD |
108 | ", curr_inact_ts %" PRId64, \ |
109 | print_state(live_stream_iter), \ | |
110 | live_stream_iter->last_inactivity_ts, \ | |
111 | live_stream_iter->current_inactivity_ts); \ | |
112 | } while (0); | |
6f79a7cf MD |
113 | |
114 | BT_HIDDEN | |
9b4f9b42 | 115 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 116 | { |
14f28187 | 117 | bool ret; |
6f79a7cf | 118 | |
9b4f9b42 | 119 | if (!msg_iter) { |
14f28187 FD |
120 | ret = false; |
121 | goto end; | |
7cdc2bab | 122 | } |
7cdc2bab | 123 | |
9b4f9b42 PP |
124 | ret = bt_self_message_iterator_is_interrupted( |
125 | msg_iter->self_msg_iter); | |
4bf0e537 | 126 | |
14f28187 FD |
127 | end: |
128 | return ret; | |
7cdc2bab MD |
129 | } |
130 | ||
131 | static | |
132 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
133 | uint64_t trace_id) | |
d3e4dcd8 | 134 | { |
14f28187 FD |
135 | uint64_t trace_idx; |
136 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 137 | |
14f28187 FD |
138 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
139 | struct lttng_live_trace *trace = | |
140 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 141 | if (trace->id == trace_id) { |
14f28187 FD |
142 | ret_trace = trace; |
143 | goto end; | |
7cdc2bab MD |
144 | } |
145 | } | |
14f28187 FD |
146 | |
147 | end: | |
148 | return ret_trace; | |
d3eb6e8f PP |
149 | } |
150 | ||
7cdc2bab | 151 | static |
14f28187 | 152 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 153 | { |
c01594de | 154 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 155 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 156 | |
2ece7dd0 | 157 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 158 | |
14f28187 FD |
159 | BT_ASSERT(trace->stream_iterators); |
160 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 161 | |
14f28187 FD |
162 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
163 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 164 | |
7cdc2bab | 165 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
166 | g_free(trace); |
167 | } | |
168 | ||
169 | static | |
170 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
171 | uint64_t trace_id) | |
172 | { | |
173 | struct lttng_live_trace *trace = NULL; | |
c01594de | 174 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 175 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab MD |
176 | |
177 | trace = g_new0(struct lttng_live_trace, 1); | |
178 | if (!trace) { | |
179 | goto error; | |
180 | } | |
c01594de | 181 | trace->log_level = session->log_level; |
2ece7dd0 | 182 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
183 | trace->session = session; |
184 | trace->id = trace_id; | |
14f28187 FD |
185 | trace->trace_class = NULL; |
186 | trace->trace = NULL; | |
187 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
188 | (GDestroyNotify) lttng_live_stream_iterator_destroy); | |
189 | BT_ASSERT(trace->stream_iterators); | |
7cdc2bab | 190 | trace->new_metadata_needed = true; |
14f28187 FD |
191 | g_ptr_array_add(session->traces, trace); |
192 | ||
2ece7dd0 | 193 | BT_COMP_LOGI("Create trace"); |
7cdc2bab MD |
194 | goto end; |
195 | error: | |
196 | g_free(trace); | |
197 | trace = NULL; | |
198 | end: | |
199 | return trace; | |
200 | } | |
201 | ||
202 | BT_HIDDEN | |
14f28187 FD |
203 | struct lttng_live_trace *lttng_live_borrow_trace( |
204 | struct lttng_live_session *session, uint64_t trace_id) | |
7cdc2bab MD |
205 | { |
206 | struct lttng_live_trace *trace; | |
207 | ||
208 | trace = lttng_live_find_trace(session, trace_id); | |
209 | if (trace) { | |
14f28187 | 210 | goto end; |
7cdc2bab | 211 | } |
7cdc2bab | 212 | |
14f28187 FD |
213 | /* The session is the owner of the newly created trace. */ |
214 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 215 | |
14f28187 FD |
216 | end: |
217 | return trace; | |
7cdc2bab MD |
218 | } |
219 | ||
220 | BT_HIDDEN | |
14f28187 | 221 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
222 | uint64_t session_id, const char *hostname, |
223 | const char *session_name) | |
7cdc2bab MD |
224 | { |
225 | int ret = 0; | |
14f28187 | 226 | struct lttng_live_session *session; |
c01594de | 227 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 228 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 229 | |
14f28187 FD |
230 | session = g_new0(struct lttng_live_session, 1); |
231 | if (!session) { | |
7cdc2bab MD |
232 | goto error; |
233 | } | |
234 | ||
c01594de | 235 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 236 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
237 | session->id = session_id; |
238 | session->traces = g_ptr_array_new_with_free_func( | |
239 | (GDestroyNotify) lttng_live_destroy_trace); | |
240 | BT_ASSERT(session->traces); | |
241 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
242 | session->new_streams_needed = true; | |
243 | session->hostname = g_string_new(hostname); | |
244 | BT_ASSERT(session->hostname); | |
245 | ||
246 | session->session_name = g_string_new(session_name); | |
247 | BT_ASSERT(session->session_name); | |
7cdc2bab | 248 | |
2ece7dd0 | 249 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
14f28187 FD |
250 | session->id, hostname, session_name); |
251 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); | |
7cdc2bab MD |
252 | goto end; |
253 | error: | |
2ece7dd0 | 254 | BT_COMP_LOGE("Error adding session"); |
14f28187 | 255 | g_free(session); |
7cdc2bab MD |
256 | ret = -1; |
257 | end: | |
258 | return ret; | |
259 | } | |
260 | ||
261 | static | |
262 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
263 | { | |
c01594de | 264 | bt_logging_level log_level; |
2ece7dd0 | 265 | bt_self_component *self_comp; |
14f28187 FD |
266 | |
267 | if (!session) { | |
268 | goto end; | |
269 | } | |
7cdc2bab | 270 | |
c01594de | 271 | log_level = session->log_level; |
2ece7dd0 PP |
272 | self_comp = session->self_comp; |
273 | BT_COMP_LOGD("Destroy lttng live session"); | |
7cdc2bab MD |
274 | if (session->id != -1ULL) { |
275 | if (lttng_live_detach_session(session)) { | |
14f28187 | 276 | if (session->lttng_live_msg_iter && |
9b4f9b42 PP |
277 | !lttng_live_graph_is_canceled( |
278 | session->lttng_live_msg_iter)) { | |
4c66436f | 279 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 280 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
281 | session->id); |
282 | } | |
7cdc2bab MD |
283 | } |
284 | session->id = -1ULL; | |
285 | } | |
14f28187 FD |
286 | |
287 | if (session->traces) { | |
288 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 289 | } |
14f28187 | 290 | |
06994c71 MD |
291 | if (session->hostname) { |
292 | g_string_free(session->hostname, TRUE); | |
293 | } | |
294 | if (session->session_name) { | |
295 | g_string_free(session->session_name, TRUE); | |
296 | } | |
7cdc2bab | 297 | g_free(session); |
14f28187 FD |
298 | |
299 | end: | |
300 | return; | |
7cdc2bab MD |
301 | } |
302 | ||
14f28187 FD |
303 | static |
304 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 305 | { |
14f28187 FD |
306 | if (!lttng_live_msg_iter) { |
307 | goto end; | |
7cdc2bab | 308 | } |
7cdc2bab | 309 | |
14f28187 FD |
310 | if (lttng_live_msg_iter->sessions) { |
311 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 312 | } |
14f28187 FD |
313 | |
314 | BT_OBJECT_PUT_REF_AND_RESET(lttng_live_msg_iter->viewer_connection); | |
315 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); | |
316 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
317 | ||
318 | /* All stream iterators must be destroyed at this point. */ | |
319 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
320 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
321 | ||
322 | g_free(lttng_live_msg_iter); | |
323 | ||
324 | end: | |
325 | return; | |
326 | } | |
327 | ||
328 | BT_HIDDEN | |
329 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
330 | { | |
331 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
332 | ||
333 | BT_ASSERT(self_msg_iter); | |
334 | ||
335 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
336 | BT_ASSERT(lttng_live_msg_iter); | |
337 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
338 | } |
339 | ||
340 | static | |
14f28187 | 341 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
342 | struct lttng_live_stream_iterator *lttng_live_stream) |
343 | { | |
c01594de | 344 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 345 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 346 | |
7cdc2bab MD |
347 | switch (lttng_live_stream->state) { |
348 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
349 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
350 | break; | |
351 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
352 | /* Invalid state. */ | |
2ece7dd0 | 353 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
087bc060 | 354 | abort(); |
7cdc2bab MD |
355 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
356 | /* Invalid state. */ | |
2ece7dd0 | 357 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
087bc060 | 358 | abort(); |
7cdc2bab MD |
359 | case LTTNG_LIVE_STREAM_EOF: |
360 | break; | |
361 | } | |
14f28187 | 362 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
363 | } |
364 | ||
365 | /* | |
366 | * For active no data stream, fetch next data. It can be either: | |
367 | * - quiescent: need to put it in the prio heap at quiescent end | |
368 | * timestamp, | |
369 | * - have data: need to wire up first event into the prio heap, | |
370 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
371 | * return EOF. | |
372 | */ | |
373 | static | |
14f28187 FD |
374 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
375 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
376 | struct lttng_live_stream_iterator *lttng_live_stream) |
377 | { | |
c01594de | 378 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 379 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
380 | enum lttng_live_iterator_status ret = |
381 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
382 | struct packet_index index; |
383 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; | |
384 | ||
385 | if (lttng_live_stream->trace->new_metadata_needed) { | |
14f28187 | 386 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
387 | goto end; |
388 | } | |
389 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
14f28187 | 390 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
391 | goto end; |
392 | } | |
14f28187 FD |
393 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
394 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
395 | goto end; |
396 | } | |
14f28187 FD |
397 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
398 | &index); | |
399 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
7cdc2bab MD |
400 | goto end; |
401 | } | |
f6ccaed9 | 402 | BT_ASSERT(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 403 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 FD |
404 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
405 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
406 | ||
407 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
408 | last_inact_ts == curr_inact_ts) { | |
409 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
7cdc2bab MD |
410 | print_stream_state(lttng_live_stream); |
411 | } else { | |
14f28187 | 412 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
413 | } |
414 | goto end; | |
415 | } | |
416 | lttng_live_stream->base_offset = index.offset; | |
417 | lttng_live_stream->offset = index.offset; | |
418 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
419 | end: | |
14f28187 FD |
420 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
421 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
422 | } |
423 | return ret; | |
424 | } | |
425 | ||
426 | /* | |
14f28187 FD |
427 | * Creation of the message requires the ctf trace class to be created |
428 | * beforehand, but the live protocol gives us all streams (including metadata) | |
429 | * at once. So we split it in three steps: getting streams, getting metadata | |
430 | * (which creates the ctf trace class), and then creating the per-stream | |
431 | * messages. | |
7cdc2bab MD |
432 | */ |
433 | static | |
14f28187 FD |
434 | enum lttng_live_iterator_status lttng_live_get_session( |
435 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
436 | struct lttng_live_session *session) |
437 | { | |
14f28187 FD |
438 | enum lttng_live_iterator_status status; |
439 | uint64_t trace_idx; | |
440 | int ret = 0; | |
7cdc2bab | 441 | |
14f28187 FD |
442 | if (!session->attached) { |
443 | ret = lttng_live_attach_session(session); | |
444 | if (ret) { | |
42521b69 | 445 | if (lttng_live_msg_iter && lttng_live_graph_is_canceled( |
9b4f9b42 | 446 | lttng_live_msg_iter)) { |
14f28187 FD |
447 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
448 | } else { | |
449 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
450 | } | |
451 | goto end; | |
4c66436f | 452 | } |
7cdc2bab | 453 | } |
14f28187 | 454 | |
7cdc2bab | 455 | status = lttng_live_get_new_streams(session); |
14f28187 FD |
456 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
457 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
458 | goto end; | |
7cdc2bab | 459 | } |
14f28187 FD |
460 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
461 | struct lttng_live_trace *trace = | |
462 | g_ptr_array_index(session->traces, trace_idx); | |
463 | ||
7cdc2bab | 464 | status = lttng_live_metadata_update(trace); |
14f28187 FD |
465 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
466 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
467 | goto end; | |
7cdc2bab MD |
468 | } |
469 | } | |
14f28187 FD |
470 | status = lttng_live_lazy_msg_init(session); |
471 | ||
472 | end: | |
473 | return status; | |
7cdc2bab MD |
474 | } |
475 | ||
476 | BT_HIDDEN | |
14f28187 | 477 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 478 | { |
14f28187 | 479 | uint64_t session_idx; |
7cdc2bab | 480 | |
14f28187 FD |
481 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
482 | session_idx++) { | |
483 | struct lttng_live_session *session = | |
484 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
485 | session->new_streams_needed = true; |
486 | } | |
487 | } | |
488 | ||
489 | static | |
14f28187 | 490 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 491 | { |
14f28187 | 492 | uint64_t session_idx, trace_idx; |
7cdc2bab | 493 | |
14f28187 FD |
494 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
495 | session_idx++) { | |
496 | struct lttng_live_session *session = | |
497 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 498 | session->new_streams_needed = true; |
14f28187 FD |
499 | for (trace_idx = 0; trace_idx < session->traces->len; |
500 | trace_idx++) { | |
501 | struct lttng_live_trace *trace = | |
502 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
503 | trace->new_metadata_needed = true; |
504 | } | |
505 | } | |
506 | } | |
507 | ||
508 | static | |
14f28187 FD |
509 | enum lttng_live_iterator_status |
510 | lttng_live_iterator_handle_new_streams_and_metadata( | |
511 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 512 | { |
14f28187 FD |
513 | enum lttng_live_iterator_status ret = |
514 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
515 | uint64_t session_idx = 0, nr_sessions_opened = 0; | |
516 | struct lttng_live_session *session; | |
517 | enum session_not_found_action sess_not_found_act = | |
518 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
519 | ||
7cdc2bab | 520 | /* |
14f28187 | 521 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
522 | * session" flag to the protocol, which would tell us that we |
523 | * need to query for new sessions even though we have sessions | |
524 | * currently ongoing. | |
525 | */ | |
14f28187 FD |
526 | if (lttng_live_msg_iter->sessions->len == 0) { |
527 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
528 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
529 | goto end; | |
530 | } else { | |
531 | /* | |
532 | * Retry to create a viewer session for the requested | |
533 | * session name. | |
534 | */ | |
535 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
536 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
537 | goto end; | |
538 | } | |
539 | } | |
7cdc2bab | 540 | } |
14f28187 FD |
541 | |
542 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
543 | session_idx++) { | |
544 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
545 | session_idx); | |
546 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 547 | switch (ret) { |
14f28187 | 548 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 549 | break; |
14f28187 FD |
550 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
551 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
552 | break; |
553 | default: | |
554 | goto end; | |
555 | } | |
556 | if (!session->closed) { | |
557 | nr_sessions_opened++; | |
558 | } | |
559 | } | |
560 | end: | |
14f28187 FD |
561 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
562 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
563 | nr_sessions_opened == 0) { | |
564 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
565 | } |
566 | return ret; | |
567 | } | |
568 | ||
569 | static | |
14f28187 FD |
570 | enum lttng_live_iterator_status emit_inactivity_message( |
571 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
572 | struct lttng_live_stream_iterator *stream_iter, | |
573 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 574 | { |
14f28187 FD |
575 | enum lttng_live_iterator_status ret = |
576 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
577 | bt_message *msg = NULL; | |
7cdc2bab | 578 | |
14f28187 FD |
579 | BT_ASSERT(stream_iter->trace->clock_class); |
580 | ||
581 | msg = bt_message_message_iterator_inactivity_create( | |
582 | lttng_live_msg_iter->self_msg_iter, | |
583 | stream_iter->trace->clock_class, | |
584 | timestamp); | |
d6e69534 | 585 | if (!msg) { |
7cdc2bab MD |
586 | goto error; |
587 | } | |
14f28187 | 588 | |
d6e69534 | 589 | *message = msg; |
7cdc2bab | 590 | end: |
7cdc2bab MD |
591 | return ret; |
592 | ||
593 | error: | |
14f28187 | 594 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 595 | bt_message_put_ref(msg); |
7cdc2bab MD |
596 | goto end; |
597 | } | |
598 | ||
599 | static | |
14f28187 FD |
600 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
601 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 602 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 603 | bt_message **message) |
7cdc2bab | 604 | { |
14f28187 FD |
605 | enum lttng_live_iterator_status ret = |
606 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
607 | |
608 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 609 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
610 | } |
611 | ||
14f28187 FD |
612 | if (lttng_live_stream->current_inactivity_ts == |
613 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 614 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
14f28187 FD |
615 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
616 | goto end; | |
617 | } | |
618 | ||
619 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
620 | message, lttng_live_stream->current_inactivity_ts); | |
621 | ||
622 | lttng_live_stream->last_inactivity_ts = | |
623 | lttng_live_stream->current_inactivity_ts; | |
624 | end: | |
625 | return ret; | |
626 | } | |
627 | ||
628 | static | |
629 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
630 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
631 | const bt_message *msg, int64_t last_msg_ts_ns, | |
632 | int64_t *ts_ns) | |
633 | { | |
634 | const bt_clock_class *clock_class = NULL; | |
635 | const bt_clock_snapshot *clock_snapshot = NULL; | |
636 | int ret = 0; | |
c01594de | 637 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 638 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
639 | |
640 | BT_ASSERT(msg); | |
641 | BT_ASSERT(ts_ns); | |
642 | ||
2ece7dd0 | 643 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
644 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
645 | last_msg_ts_ns); | |
646 | ||
647 | switch (bt_message_get_type(msg)) { | |
648 | case BT_MESSAGE_TYPE_EVENT: | |
649 | clock_class = | |
650 | bt_message_event_borrow_stream_class_default_clock_class_const( | |
651 | msg); | |
652 | BT_ASSERT(clock_class); | |
653 | ||
0cbc2c33 PP |
654 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
655 | msg); | |
14f28187 FD |
656 | break; |
657 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
658 | clock_class = | |
659 | bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( | |
660 | msg); | |
661 | BT_ASSERT(clock_class); | |
662 | ||
0cbc2c33 PP |
663 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
664 | msg); | |
14f28187 FD |
665 | break; |
666 | case BT_MESSAGE_TYPE_PACKET_END: | |
667 | clock_class = | |
668 | bt_message_packet_end_borrow_stream_class_default_clock_class_const( | |
669 | msg); | |
670 | BT_ASSERT(clock_class); | |
671 | ||
0cbc2c33 PP |
672 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
673 | msg); | |
14f28187 FD |
674 | break; |
675 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
676 | clock_class = | |
677 | bt_message_discarded_events_borrow_stream_class_default_clock_class_const( | |
678 | msg); | |
679 | BT_ASSERT(clock_class); | |
680 | ||
9b24b6aa | 681 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 682 | msg); |
14f28187 FD |
683 | break; |
684 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
685 | clock_class = | |
686 | bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( | |
687 | msg); | |
688 | BT_ASSERT(clock_class); | |
689 | ||
9b24b6aa | 690 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 691 | msg); |
14f28187 | 692 | break; |
14f28187 | 693 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0cbc2c33 | 694 | clock_snapshot = |
14f28187 | 695 | bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
0cbc2c33 | 696 | msg); |
14f28187 FD |
697 | break; |
698 | default: | |
699 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 700 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 701 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
702 | goto end; |
703 | } | |
704 | ||
14f28187 FD |
705 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
706 | BT_ASSERT(clock_class); | |
707 | ||
708 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
709 | if (ret) { | |
2ece7dd0 | 710 | BT_COMP_LOGE("Cannot get nanoseconds from Epoch of clock snapshot: " |
14f28187 FD |
711 | "clock-snapshot-addr=%p", clock_snapshot); |
712 | goto error; | |
713 | } | |
714 | ||
715 | goto end; | |
716 | ||
14f28187 FD |
717 | error: |
718 | ret = -1; | |
7cdc2bab | 719 | |
7cdc2bab | 720 | end: |
14f28187 | 721 | if (ret == 0) { |
2ece7dd0 | 722 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
723 | "iter-data-addr=%p, msg-addr=%p, " |
724 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
725 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
726 | } | |
727 | ||
7cdc2bab MD |
728 | return ret; |
729 | } | |
730 | ||
731 | static | |
14f28187 FD |
732 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
733 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 734 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 735 | bt_message **message) |
7cdc2bab | 736 | { |
14f28187 | 737 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
d6e69534 | 738 | enum bt_msg_iter_status status; |
14f28187 | 739 | uint64_t session_idx, trace_idx; |
c01594de | 740 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 741 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 742 | |
14f28187 FD |
743 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
744 | session_idx++) { | |
745 | struct lttng_live_session *session = | |
746 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
747 | |
748 | if (session->new_streams_needed) { | |
14f28187 FD |
749 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
750 | goto end; | |
7cdc2bab | 751 | } |
14f28187 FD |
752 | for (trace_idx = 0; trace_idx < session->traces->len; |
753 | trace_idx++) { | |
754 | struct lttng_live_trace *trace = | |
755 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 756 | if (trace->new_metadata_needed) { |
14f28187 FD |
757 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
758 | goto end; | |
7cdc2bab MD |
759 | } |
760 | } | |
761 | } | |
762 | ||
763 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 FD |
764 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
765 | goto end; | |
7cdc2bab | 766 | } |
14f28187 FD |
767 | |
768 | status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter, | |
769 | lttng_live_msg_iter->self_msg_iter, message); | |
7cdc2bab | 770 | switch (status) { |
d6e69534 | 771 | case BT_MSG_ITER_STATUS_EOF: |
14f28187 | 772 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 773 | break; |
d6e69534 | 774 | case BT_MSG_ITER_STATUS_OK: |
14f28187 | 775 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 776 | break; |
d6e69534 | 777 | case BT_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
778 | /* |
779 | * Continue immediately (end of packet). The next | |
780 | * get_index may return AGAIN to delay the following | |
781 | * attempt. | |
782 | */ | |
14f28187 | 783 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 784 | break; |
d6e69534 | 785 | case BT_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 786 | /* No argument provided by the user, so don't return INVAL. */ |
d6e69534 | 787 | case BT_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 788 | default: |
14f28187 | 789 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
2ece7dd0 | 790 | BT_COMP_LOGW("CTF msg iterator return an error or failed msg_iter=%p", |
14f28187 | 791 | lttng_live_stream->msg_iter); |
7cdc2bab MD |
792 | break; |
793 | } | |
14f28187 FD |
794 | |
795 | end: | |
7cdc2bab MD |
796 | return ret; |
797 | } | |
798 | ||
4a39caef FD |
799 | static |
800 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
801 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
802 | struct lttng_live_stream_iterator *stream_iter, | |
803 | bt_message **curr_msg) | |
804 | { | |
805 | enum lttng_live_iterator_status live_status = | |
806 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
807 | /* | |
808 | * The viewer has hung up on us so we are closing the stream. The | |
809 | * `bt_msg_iter` should simply realize that it needs to close the | |
810 | * stream properly by emitting the necessary stream end message. | |
811 | */ | |
812 | enum bt_msg_iter_status status = | |
813 | bt_msg_iter_get_next_message(stream_iter->msg_iter, | |
814 | lttng_live_msg_iter->self_msg_iter, curr_msg); | |
815 | ||
816 | if (status == BT_MSG_ITER_STATUS_ERROR) { | |
817 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
818 | goto end; | |
819 | } | |
820 | ||
821 | BT_ASSERT(status == BT_MSG_ITER_STATUS_OK); | |
822 | ||
823 | end: | |
824 | return live_status; | |
825 | } | |
826 | ||
7cdc2bab MD |
827 | /* |
828 | * helper function: | |
829 | * handle_no_data_streams() | |
830 | * retry: | |
831 | * - for each ACTIVE_NO_DATA stream: | |
832 | * - query relayd for stream data, or quiescence info. | |
833 | * - if need metadata, get metadata, goto retry. | |
834 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
835 | * - if quiescent, move to QUIESCENT streams | |
836 | * - if fetched data, move to ACTIVE_DATA streams | |
837 | * (at this point each stream either has data, or is quiescent) | |
838 | * | |
839 | * | |
840 | * iterator_next: | |
841 | * handle_new_streams_and_metadata() | |
842 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
843 | * - query relayd for metadata | |
844 | * | |
845 | * call handle_active_no_data_streams() | |
846 | * | |
847 | * handle_quiescent_streams() | |
848 | * - if at least one stream is ACTIVE_DATA: | |
849 | * - peek stream event with lowest timestamp -> next_ts | |
850 | * - for each quiescent stream | |
851 | * - if next_ts >= quiescent end | |
852 | * - set state to ACTIVE_NO_DATA | |
853 | * - else | |
854 | * - for each quiescent stream | |
855 | * - set state to ACTIVE_NO_DATA | |
856 | * | |
857 | * call handle_active_no_data_streams() | |
858 | * | |
859 | * handle_active_data_streams() | |
860 | * - if at least one stream is ACTIVE_DATA: | |
861 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 862 | * - make that stream event the current message. |
7cdc2bab MD |
863 | * - move this stream heap position to its next event |
864 | * - if we need to fetch data from relayd, move | |
865 | * stream to ACTIVE_NO_DATA. | |
866 | * - return OK | |
867 | * - return AGAIN | |
868 | * | |
869 | * end criterion: ctrl-c on client. If relayd exits or the session | |
870 | * closes on the relay daemon side, we keep on waiting for streams. | |
871 | * Eventually handle --end timestamp (also an end criterion). | |
872 | * | |
873 | * When disconnected from relayd: try to re-connect endlessly. | |
874 | */ | |
875 | static | |
a31f4d8b | 876 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
877 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
878 | struct lttng_live_stream_iterator *stream_iter, | |
879 | bt_message **curr_msg) | |
7cdc2bab | 880 | { |
c01594de | 881 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 882 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 883 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 884 | |
4a39caef FD |
885 | if (stream_iter->has_stream_hung_up) { |
886 | /* | |
887 | * The stream has hung up and the stream was properly closed | |
888 | * during the last call to the current function. Return _END | |
889 | * status now so that this stream iterator is removed for the | |
890 | * stream iterator list. | |
891 | */ | |
892 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
893 | goto end; | |
894 | } | |
895 | ||
7cdc2bab MD |
896 | retry: |
897 | print_stream_state(stream_iter); | |
14f28187 FD |
898 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
899 | lttng_live_msg_iter); | |
900 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
7cdc2bab MD |
901 | goto end; |
902 | } | |
14f28187 FD |
903 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
904 | lttng_live_msg_iter, stream_iter); | |
4a39caef | 905 | |
14f28187 | 906 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
907 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
908 | /* | |
909 | * We overwrite `live_status` since `curr_msg` is | |
910 | * likely set to a valid message in this function. | |
911 | */ | |
912 | live_status = lttng_live_iterator_close_stream( | |
913 | lttng_live_msg_iter, stream_iter, curr_msg); | |
914 | } | |
7cdc2bab MD |
915 | goto end; |
916 | } | |
14f28187 FD |
917 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
918 | lttng_live_msg_iter, stream_iter, curr_msg); | |
919 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
5084732e | 920 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
921 | goto end; |
922 | } | |
14f28187 | 923 | if (*curr_msg) { |
7cdc2bab MD |
924 | goto end; |
925 | } | |
14f28187 FD |
926 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
927 | lttng_live_msg_iter, stream_iter, curr_msg); | |
928 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
5084732e | 929 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
930 | } |
931 | ||
932 | end: | |
14f28187 | 933 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 934 | goto retry; |
7cdc2bab | 935 | } |
14f28187 FD |
936 | |
937 | return live_status; | |
7cdc2bab MD |
938 | } |
939 | ||
940 | static | |
14f28187 FD |
941 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
942 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
943 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 944 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 945 | { |
a31f4d8b | 946 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
14f28187 | 947 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 948 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 949 | uint64_t stream_iter_idx; |
c01594de | 950 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 951 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 952 | |
14f28187 FD |
953 | BT_ASSERT(live_trace); |
954 | BT_ASSERT(live_trace->stream_iterators); | |
955 | /* | |
956 | * Update the current message of every stream iterators of this trace. | |
957 | * The current msg of every stream must have a timestamp equal or | |
958 | * larger than the last message returned by this iterator. We must | |
959 | * ensure monotonicity. | |
960 | */ | |
961 | stream_iter_idx = 0; | |
962 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
963 | bool stream_iter_is_ended = false; | |
964 | struct lttng_live_stream_iterator *stream_iter = | |
965 | g_ptr_array_index(live_trace->stream_iterators, | |
966 | stream_iter_idx); | |
967 | ||
07afb6bc FD |
968 | /* |
969 | * Since we may remove elements from the GPtrArray as we | |
970 | * iterate over it, it's possible to see the same element more | |
971 | * than once. | |
972 | */ | |
a31f4d8b | 973 | if (stream_iter == youngest_candidate_stream_iter) { |
07afb6bc FD |
974 | stream_iter_idx++; |
975 | continue; | |
976 | } | |
977 | ||
14f28187 FD |
978 | /* |
979 | * Find if there is are now current message for this stream | |
980 | * iterator get it. | |
981 | */ | |
982 | while (!stream_iter->current_msg) { | |
983 | bt_message *msg = NULL; | |
984 | int64_t curr_msg_ts_ns = INT64_MAX; | |
a31f4d8b | 985 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
986 | lttng_live_msg_iter, stream_iter, &msg); |
987 | ||
2ece7dd0 | 988 | BT_COMP_LOGD("live stream iterator returned status :%s", |
14f28187 FD |
989 | print_live_iterator_status(stream_iter_status)); |
990 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
991 | stream_iter_is_ended = true; | |
992 | break; | |
993 | } | |
994 | ||
995 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
996 | goto end; | |
997 | } | |
998 | ||
999 | BT_ASSERT(msg); | |
1000 | ||
1001 | /* | |
1002 | * Get the timestamp in nanoseconds from origin of this | |
1003 | * messsage. | |
1004 | */ | |
1005 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1006 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1007 | &curr_msg_ts_ns); | |
1008 | ||
1009 | /* | |
1010 | * Check if the message of the current live stream | |
1011 | * iterator occured at the exact same time or after the | |
1012 | * last message returned by this component's message | |
1013 | * iterator. If not, we return an error. | |
1014 | */ | |
1015 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1016 | stream_iter->current_msg = msg; | |
1017 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
1018 | } else { | |
1019 | /* | |
1020 | * We received a message in the past. To ensure | |
1021 | * monotonicity, we can't send it forward. | |
1022 | */ | |
2ece7dd0 | 1023 | BT_COMP_LOGE("Message's timestamp is less than " |
14f28187 FD |
1024 | "lttng-live's message iterator's last " |
1025 | "returned timestamp: " | |
1026 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1027 | "last-msg-ts=%" PRId64, | |
1028 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1029 | lttng_live_msg_iter->last_msg_ts_ns); | |
1030 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1031 | goto end; | |
1032 | } | |
1033 | } | |
1034 | ||
a31f4d8b | 1035 | BT_ASSERT(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1036 | |
1037 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1038 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1039 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1040 | /* |
1041 | * Update the current best candidate message | |
1042 | * for the stream iterator of this live trace | |
1043 | * to be forwarded downstream. | |
1044 | */ | |
a31f4d8b FD |
1045 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1046 | youngest_candidate_stream_iter = stream_iter; | |
1047 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1048 | /* |
1049 | * Order the messages in an arbitrary but | |
1050 | * deterministic way. | |
1051 | */ | |
a31f4d8b | 1052 | BT_ASSERT(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1053 | int ret = common_muxing_compare_messages( |
1054 | stream_iter->current_msg, | |
a31f4d8b | 1055 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1056 | if (ret < 0) { |
1057 | /* | |
a31f4d8b | 1058 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1059 | * should go first. Update the next |
1060 | * iterator and the current timestamp. | |
1061 | */ | |
a31f4d8b FD |
1062 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1063 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1064 | } else if (ret == 0) { |
1065 | /* | |
1066 | * Unable to pick which one should go | |
1067 | * first. | |
1068 | */ | |
1069 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1070 | "stream-iter-addr=%p" | |
1071 | "stream-iter-addr=%p", | |
1072 | stream_iter, | |
a31f4d8b | 1073 | youngest_candidate_stream_iter); |
07afb6bc FD |
1074 | } |
1075 | } | |
14f28187 | 1076 | |
07afb6bc FD |
1077 | stream_iter_idx++; |
1078 | } else { | |
14f28187 FD |
1079 | /* |
1080 | * The live stream iterator is ENDed. We remove that | |
1081 | * iterator from the list and we restart the iteration | |
1082 | * at the beginning of the live stream iterator array | |
1083 | * to because the removal will shuffle the array. | |
1084 | */ | |
1085 | g_ptr_array_remove_index_fast(live_trace->stream_iterators, | |
1086 | stream_iter_idx); | |
1087 | stream_iter_idx = 0; | |
14f28187 FD |
1088 | } |
1089 | } | |
1090 | ||
a31f4d8b FD |
1091 | if (youngest_candidate_stream_iter) { |
1092 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1093 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1094 | } else { | |
1095 | /* | |
1096 | * The only case where we don't have a candidate for this trace | |
1097 | * is if we reached the end of all the iterators. | |
1098 | */ | |
1099 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1100 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1101 | } | |
1102 | ||
1103 | end: | |
1104 | return stream_iter_status; | |
1105 | } | |
1106 | ||
1107 | static | |
1108 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1109 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1110 | struct lttng_live_session *session, | |
a31f4d8b | 1111 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1112 | { |
07afb6bc FD |
1113 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1114 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1115 | enum lttng_live_iterator_status stream_iter_status; |
1116 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1117 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1118 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 FD |
1119 | |
1120 | /* | |
1121 | * Make sure we are attached to the session and look for new streams | |
1122 | * and metadata. | |
1123 | */ | |
1124 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1125 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1126 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1127 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1128 | goto end; |
1129 | } | |
14f28187 FD |
1130 | |
1131 | BT_ASSERT(session->traces); | |
1132 | ||
1133 | /* | |
1134 | * Use while loops here rather then for loops so we can restart the | |
1135 | * iteration if an element is removed from the array during the | |
1136 | * looping. | |
1137 | */ | |
1138 | while (trace_idx < session->traces->len) { | |
1139 | bool trace_is_ended = false; | |
1140 | struct lttng_live_stream_iterator *stream_iter; | |
1141 | struct lttng_live_trace *trace = | |
1142 | g_ptr_array_index(session->traces, trace_idx); | |
1143 | ||
1144 | stream_iter_status = next_stream_iterator_for_trace( | |
1145 | lttng_live_msg_iter, trace, &stream_iter); | |
1146 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1147 | /* | |
1148 | * All the live stream iterators for this trace are | |
1149 | * ENDed. Remove the trace from this session. | |
1150 | */ | |
1151 | trace_is_ended = true; | |
1152 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1153 | goto end; | |
1154 | } | |
1155 | ||
1156 | if (!trace_is_ended) { | |
1157 | BT_ASSERT(stream_iter); | |
1158 | ||
a31f4d8b FD |
1159 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1160 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1161 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1162 | youngest_candidate_stream_iter = stream_iter; | |
1163 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1164 | /* |
1165 | * Order the messages in an arbitrary but | |
1166 | * deterministic way. | |
1167 | */ | |
1168 | int ret = common_muxing_compare_messages( | |
1169 | stream_iter->current_msg, | |
a31f4d8b | 1170 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1171 | if (ret < 0) { |
1172 | /* | |
a31f4d8b | 1173 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1174 | * should go first. Update the next iterator |
1175 | * and the current timestamp. | |
1176 | */ | |
a31f4d8b FD |
1177 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1178 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1179 | } else if (ret == 0) { |
1180 | /* Unable to pick which one should go first. */ | |
1181 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1182 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1183 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1184 | } |
14f28187 FD |
1185 | } |
1186 | trace_idx++; | |
1187 | } else { | |
1188 | g_ptr_array_remove_index_fast(session->traces, trace_idx); | |
1189 | trace_idx = 0; | |
1190 | } | |
1191 | } | |
a31f4d8b FD |
1192 | if (youngest_candidate_stream_iter) { |
1193 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1194 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1195 | } else { |
14f28187 FD |
1196 | /* |
1197 | * The only cases where we don't have a candidate for this | |
1198 | * trace is: | |
1199 | * 1. if we reached the end of all the iterators of all the | |
1200 | * traces of this session, | |
1201 | * 2. if we never had live stream iterator in the first place. | |
1202 | * | |
1203 | * In either cases, we return END. | |
1204 | */ | |
1205 | BT_ASSERT(session->traces->len == 0); | |
1206 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1207 | } |
1208 | end: | |
14f28187 FD |
1209 | return stream_iter_status; |
1210 | } | |
1211 | ||
1212 | static inline | |
1213 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1214 | { | |
1215 | uint64_t i; | |
1216 | ||
1217 | for (i = 0; i < count; i++) { | |
1218 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1219 | } |
7cdc2bab MD |
1220 | } |
1221 | ||
d3eb6e8f | 1222 | BT_HIDDEN |
d24d5663 | 1223 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1224 | bt_self_message_iterator *self_msg_it, |
1225 | bt_message_array_const msgs, uint64_t capacity, | |
1226 | uint64_t *count) | |
d3eb6e8f | 1227 | { |
d24d5663 | 1228 | bt_component_class_message_iterator_next_method_status status; |
14f28187 FD |
1229 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1230 | bt_self_message_iterator_get_data(self_msg_it); | |
1231 | struct lttng_live_component *lttng_live = | |
1232 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1233 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1234 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1235 | enum lttng_live_iterator_status stream_iter_status; |
1236 | uint64_t session_idx; | |
1237 | ||
1238 | *count = 0; | |
1239 | ||
1240 | BT_ASSERT(lttng_live_msg_iter); | |
1241 | ||
1242 | /* | |
1243 | * Clear all the invalid message reference that might be left over in | |
1244 | * the output array. | |
1245 | */ | |
1246 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1247 | ||
1248 | /* | |
1249 | * If no session are exposed on the relay found at the url provided by | |
1250 | * the user, session count will be 0. In this case, we return status | |
1251 | * end to return gracefully. | |
1252 | */ | |
1253 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1254 | if (lttng_live->params.sess_not_found_act != | |
1255 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
d24d5663 | 1256 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
14f28187 FD |
1257 | goto no_session; |
1258 | } else { | |
1259 | /* | |
1260 | * The are no more active session for this session | |
1261 | * name. Retry to create a viewer session for the | |
1262 | * requested session name. | |
1263 | */ | |
1264 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
d24d5663 | 1265 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1266 | goto no_session; |
1267 | } | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1272 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Here the muxing of message is done. | |
1277 | * | |
1278 | * We need to iterate over all the streams of all the traces of all the | |
1279 | * viewer sessions in order to get the message with the smallest | |
1280 | * timestamp. In this case, a session is a viewer session and there is | |
1281 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1282 | * kernel). Each viewer session can have multiple traces, for example, | |
1283 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1284 | * | |
1285 | * We iterate over the streams of each traces to update and see what is | |
1286 | * their next message's timestamp. From those timestamps, we select the | |
1287 | * message with the smallest timestamp as the best candidate message | |
1288 | * for that trace and do the same thing across all the sessions. | |
1289 | * | |
1290 | * We then compare the timestamp of best candidate message of all the | |
1291 | * sessions to pick the message with the smallest timestamp and we | |
1292 | * return it. | |
1293 | */ | |
1294 | while (*count < capacity) { | |
a31f4d8b FD |
1295 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1296 | *candidate_stream_iter = NULL; | |
1297 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1298 | |
1299 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1300 | session_idx = 0; | |
1301 | /* | |
1302 | * Use a while loop instead of a for loop so we can restart the | |
1303 | * iteration if we remove an element. We can safely call | |
1304 | * next_stream_iterator_for_session() multiple times on the | |
1305 | * same session as we only fetch a new message if there is no | |
1306 | * current next message for each live stream iterator. | |
1307 | * If all live stream iterator of that session already have a | |
1308 | * current next message, the function will simply exit return | |
1309 | * the same candidate live stream iterator every time. | |
1310 | */ | |
1311 | while (session_idx < lttng_live_msg_iter->sessions->len) { | |
1312 | struct lttng_live_session *session = | |
1313 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1314 | session_idx); | |
1315 | ||
1316 | /* Find the best candidate message to send downstream. */ | |
1317 | stream_iter_status = next_stream_iterator_for_session( | |
1318 | lttng_live_msg_iter, session, | |
1319 | &candidate_stream_iter); | |
1320 | ||
1321 | /* If we receive an END status, it means that either: | |
1322 | * - Those traces never had active streams (UST with no | |
1323 | * data produced yet), | |
1324 | * - All live stream iterators have ENDed.*/ | |
1325 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1326 | if (session->closed && session->traces->len == 0) { | |
1327 | /* | |
1328 | * Remove the session from the list and restart the | |
1329 | * iteration at the beginning of the array since the | |
1330 | * removal shuffle the elements of the array. | |
1331 | */ | |
1332 | g_ptr_array_remove_index_fast( | |
1333 | lttng_live_msg_iter->sessions, | |
1334 | session_idx); | |
1335 | session_idx = 0; | |
1336 | } else { | |
1337 | session_idx++; | |
1338 | } | |
1339 | continue; | |
1340 | } | |
1341 | ||
1342 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1343 | goto end; | |
1344 | } | |
1345 | ||
a31f4d8b | 1346 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1347 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1348 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1349 | youngest_stream_iter = candidate_stream_iter; | |
1350 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1351 | /* |
1352 | * The currently selected message to be sent | |
1353 | * downstream next has the exact same timestamp | |
1354 | * that of the current candidate message. We | |
1355 | * must break the tie in a predictable manner. | |
1356 | */ | |
1357 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1358 | /* | |
1359 | * Order the messages in an arbitrary but | |
07afb6bc | 1360 | * deterministic way. |
376fc2bd | 1361 | */ |
07afb6bc FD |
1362 | int ret = common_muxing_compare_messages( |
1363 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1364 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1365 | if (ret < 0) { |
1366 | /* | |
1367 | * The `candidate_stream_iter->current_msg` | |
1368 | * should go first. Update the next | |
1369 | * iterator and the current timestamp. | |
1370 | */ | |
a31f4d8b FD |
1371 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1372 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1373 | } else if (ret == 0) { |
1374 | /* Unable to pick which one should go first. */ | |
1375 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1376 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1377 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1378 | } |
14f28187 FD |
1379 | } |
1380 | ||
1381 | session_idx++; | |
1382 | } | |
1383 | ||
a31f4d8b | 1384 | if (!youngest_stream_iter) { |
14f28187 FD |
1385 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1386 | goto end; | |
1387 | } | |
1388 | ||
a31f4d8b | 1389 | BT_ASSERT(youngest_stream_iter->current_msg); |
14f28187 FD |
1390 | /* Ensure monotonicity. */ |
1391 | BT_ASSERT(lttng_live_msg_iter->last_msg_ts_ns <= | |
a31f4d8b | 1392 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1393 | |
1394 | /* | |
1395 | * Insert the next message to the message batch. This will set | |
1396 | * stream iterator current messsage to NULL so that next time | |
1397 | * we fetch the next message of that stream iterator | |
1398 | */ | |
a31f4d8b | 1399 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1400 | (*count)++; |
1401 | ||
1402 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1403 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1404 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1405 | |
1406 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1407 | } | |
1408 | end: | |
1409 | switch (stream_iter_status) { | |
1410 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1411 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1412 | if (*count > 0) { | |
1413 | /* | |
1414 | * We received a again status but we have some messages | |
1415 | * to send downstream. We send them and return OK for | |
1416 | * now. On the next call we return again if there are | |
1417 | * still no new message to send. | |
1418 | */ | |
d24d5663 | 1419 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
14f28187 | 1420 | } else { |
d24d5663 | 1421 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1422 | } |
7cdc2bab | 1423 | break; |
14f28187 | 1424 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
d24d5663 | 1425 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1426 | break; |
14f28187 | 1427 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
d24d5663 | 1428 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1429 | break; |
1430 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1431 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1432 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
d24d5663 | 1433 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1434 | /* Put all existing messages on error. */ |
1435 | put_messages(msgs, *count); | |
7cdc2bab | 1436 | break; |
14f28187 FD |
1437 | default: |
1438 | abort(); | |
7cdc2bab | 1439 | } |
14f28187 FD |
1440 | |
1441 | no_session: | |
1442 | return status; | |
7cdc2bab | 1443 | } |
41a2b7ae | 1444 | |
7cdc2bab | 1445 | BT_HIDDEN |
d24d5663 | 1446 | bt_component_class_message_iterator_init_method_status lttng_live_msg_iter_init( |
14f28187 FD |
1447 | bt_self_message_iterator *self_msg_it, |
1448 | bt_self_component_source *self_comp_src, | |
1449 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1450 | { |
d24d5663 PP |
1451 | bt_component_class_message_iterator_init_method_status ret = |
1452 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INIT_METHOD_STATUS_OK; | |
14f28187 | 1453 | bt_self_component *self_comp = |
d24d5663 | 1454 | bt_self_component_source_as_self_component(self_comp_src); |
14f28187 FD |
1455 | struct lttng_live_component *lttng_live; |
1456 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
c01594de | 1457 | bt_logging_level log_level; |
14f28187 FD |
1458 | |
1459 | BT_ASSERT(self_msg_it); | |
1460 | ||
1461 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1462 | log_level = lttng_live->log_level; |
2ece7dd0 | 1463 | self_comp = lttng_live->self_comp; |
14f28187 FD |
1464 | |
1465 | /* There can be only one downstream iterator at the same time. */ | |
1466 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1467 | lttng_live->has_msg_iter = true; | |
1468 | ||
1469 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1470 | if (!lttng_live_msg_iter) { | |
d24d5663 | 1471 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INIT_METHOD_STATUS_ERROR; |
14f28187 | 1472 | goto end; |
7cdc2bab | 1473 | } |
14f28187 | 1474 | |
c01594de | 1475 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
2ece7dd0 | 1476 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
14f28187 FD |
1477 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1478 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1479 | ||
1480 | lttng_live_msg_iter->active_stream_iter = 0; | |
1481 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1482 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1483 | (GDestroyNotify) lttng_live_destroy_session); | |
1484 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1485 | ||
1486 | lttng_live_msg_iter->viewer_connection = | |
1487 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
550004b4 | 1488 | lttng_live_msg_iter, log_level); |
14f28187 FD |
1489 | if (!lttng_live_msg_iter->viewer_connection) { |
1490 | goto error; | |
1491 | } | |
1492 | ||
1493 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1494 | goto error; | |
1495 | } | |
1496 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1497 | switch (lttng_live->params.sess_not_found_act) { | |
1498 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
2ece7dd0 | 1499 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1500 | "session. Keep trying to connect because of " |
1501 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1502 | SESS_NOT_FOUND_ACTION_PARAM, | |
1503 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1504 | lttng_live->params.url->str); | |
1505 | break; | |
1506 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
2ece7dd0 | 1507 | BT_COMP_LOGE("Unable to connect to the requested live viewer " |
14f28187 FD |
1508 | "session. Fail the message iterator" |
1509 | "initialization because of %s=\"%s\" " | |
1510 | "component parameter: url =\"%s\"", | |
1511 | SESS_NOT_FOUND_ACTION_PARAM, | |
1512 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1513 | lttng_live->params.url->str); | |
7cdc2bab | 1514 | goto error; |
14f28187 | 1515 | case SESSION_NOT_FOUND_ACTION_END: |
2ece7dd0 | 1516 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1517 | "session. End gracefully at the first _next() " |
1518 | "call because of %s=\"%s\" component parameter: " | |
1519 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1520 | SESS_NOT_FOUND_ACTION_END_STR, | |
1521 | lttng_live->params.url->str); | |
1522 | break; | |
bce81ff2 JR |
1523 | case SESSION_NOT_FOUND_ACTION_UNKNOWN: |
1524 | default: | |
1525 | /* Fallthrough */ | |
1526 | BT_COMP_LOGE("Unknown action for session not found" | |
1527 | "error. Fail the message iterator" | |
1528 | "initialization because of %s=\"%s\" " | |
1529 | "component parameter: url =\"%s\"", | |
1530 | SESS_NOT_FOUND_ACTION_PARAM, | |
1531 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1532 | lttng_live->params.url->str); | |
1533 | break; | |
7cdc2bab | 1534 | } |
7cdc2bab MD |
1535 | } |
1536 | ||
14f28187 FD |
1537 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1538 | ||
1539 | goto end; | |
1540 | error: | |
d24d5663 | 1541 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INIT_METHOD_STATUS_ERROR; |
14f28187 | 1542 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1543 | end: |
41a2b7ae | 1544 | return ret; |
7cdc2bab MD |
1545 | } |
1546 | ||
1547 | static | |
d24d5663 PP |
1548 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1549 | const bt_value *params, const bt_value **result, | |
1550 | bt_logging_level log_level) | |
7cdc2bab | 1551 | { |
d24d5663 PP |
1552 | bt_component_class_query_method_status status = |
1553 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
14f28187 | 1554 | const bt_value *url_value = NULL; |
7cdc2bab | 1555 | const char *url; |
14f28187 | 1556 | struct live_viewer_connection *viewer_connection = NULL; |
2ece7dd0 | 1557 | bt_self_component *self_comp = NULL; |
7cdc2bab | 1558 | |
14f28187 FD |
1559 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
1560 | if (!url_value) { | |
a635e507 SM |
1561 | BT_COMP_LOGE("Mandatory `%s` parameter missing", URL_PARAM); |
1562 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
7cdc2bab MD |
1563 | goto error; |
1564 | } | |
1565 | ||
14f28187 | 1566 | if (!bt_value_is_string(url_value)) { |
a635e507 | 1567 | BT_COMP_LOGE("`%s` parameter is required to be a string value", |
14f28187 | 1568 | URL_PARAM); |
a635e507 | 1569 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1570 | goto error; |
1571 | } | |
1572 | ||
14f28187 FD |
1573 | url = bt_value_string_get(url_value); |
1574 | ||
550004b4 PP |
1575 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
1576 | log_level); | |
7cdc2bab | 1577 | if (!viewer_connection) { |
7cdc2bab MD |
1578 | goto error; |
1579 | } | |
1580 | ||
14f28187 FD |
1581 | status = live_viewer_connection_list_sessions(viewer_connection, |
1582 | result); | |
d24d5663 | 1583 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
c7eee084 PP |
1584 | goto error; |
1585 | } | |
1586 | ||
7cdc2bab | 1587 | goto end; |
c7eee084 | 1588 | |
7cdc2bab | 1589 | error: |
14f28187 | 1590 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1591 | |
14f28187 | 1592 | if (status >= 0) { |
d24d5663 | 1593 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1594 | } |
1595 | ||
7cdc2bab MD |
1596 | end: |
1597 | if (viewer_connection) { | |
14f28187 | 1598 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1599 | } |
14f28187 | 1600 | return status; |
7cdc2bab MD |
1601 | } |
1602 | ||
312df793 PP |
1603 | static |
1604 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1605 | const bt_value *params, const bt_value **result, | |
1606 | bt_logging_level log_level) | |
1607 | { | |
1608 | bt_component_class_query_method_status status = | |
1609 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1610 | const bt_value *input_type_value; | |
1611 | const bt_value *input_value; | |
1612 | double weight = 0; | |
1613 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1614 | ||
1615 | /* Used by the logging macros */ | |
1616 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1617 | ||
1618 | *result = NULL; | |
1619 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1620 | "type"); | |
1621 | if (!input_type_value) { | |
1622 | BT_COMP_LOGE("Missing expected `type` parameter."); | |
1623 | goto error; | |
1624 | } | |
1625 | ||
1626 | if (!bt_value_is_string(input_type_value)) { | |
1627 | BT_COMP_LOGE("`type` parameter is not a string value."); | |
1628 | goto error; | |
1629 | } | |
1630 | ||
1631 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1632 | /* We don't handle file system paths */ | |
1633 | goto create_result; | |
1634 | } | |
1635 | ||
1636 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1637 | if (!input_value) { | |
1638 | BT_COMP_LOGE("Missing expected `input` parameter."); | |
1639 | goto error; | |
1640 | } | |
1641 | ||
1642 | if (!bt_value_is_string(input_value)) { | |
1643 | BT_COMP_LOGE("`input` parameter is not a string value."); | |
1644 | goto error; | |
1645 | } | |
1646 | ||
1647 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1648 | NULL, 0); | |
1649 | if (parts.session_name) { | |
1650 | /* | |
1651 | * Looks pretty much like an LTTng live URL: we got the | |
1652 | * session name part, which forms a complete URL. | |
1653 | */ | |
1654 | weight = .75; | |
1655 | } | |
1656 | ||
1657 | create_result: | |
1658 | *result = bt_value_real_create_init(weight); | |
1659 | if (!*result) { | |
1660 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1661 | goto error; | |
1662 | } | |
1663 | ||
1664 | goto end; | |
1665 | ||
1666 | error: | |
1667 | if (status >= 0) { | |
1668 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1669 | } | |
1670 | ||
1671 | BT_ASSERT(!*result); | |
1672 | ||
1673 | end: | |
1674 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1675 | return status; | |
1676 | } | |
1677 | ||
7cdc2bab | 1678 | BT_HIDDEN |
d24d5663 PP |
1679 | bt_component_class_query_method_status lttng_live_query( |
1680 | bt_self_component_class_source *comp_class, | |
3c729b9a | 1681 | bt_private_query_executor *priv_query_exec, |
14f28187 | 1682 | const char *object, const bt_value *params, |
7c14d641 | 1683 | __attribute__((unused)) void *method_data, |
3c729b9a | 1684 | const bt_value **result) |
7cdc2bab | 1685 | { |
d24d5663 PP |
1686 | bt_component_class_query_method_status status = |
1687 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 1688 | bt_self_component *self_comp = NULL; |
3c729b9a PP |
1689 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1690 | bt_private_query_executor_as_query_executor_const( | |
1691 | priv_query_exec)); | |
c7eee084 | 1692 | |
7cdc2bab | 1693 | if (strcmp(object, "sessions") == 0) { |
c01594de PP |
1694 | status = lttng_live_query_list_sessions(params, result, |
1695 | log_level); | |
312df793 PP |
1696 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1697 | status = lttng_live_query_support_info(params, result, | |
1698 | log_level); | |
14f28187 | 1699 | } else { |
32a09ecd | 1700 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 1701 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 1702 | goto end; |
7cdc2bab | 1703 | } |
14f28187 FD |
1704 | |
1705 | end: | |
1706 | return status; | |
7cdc2bab MD |
1707 | } |
1708 | ||
1709 | static | |
1710 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1711 | { | |
19bdff20 FD |
1712 | if (!lttng_live) { |
1713 | return; | |
1714 | } | |
14f28187 FD |
1715 | if (lttng_live->params.url) { |
1716 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1717 | } |
1718 | g_free(lttng_live); | |
1719 | } | |
1720 | ||
1721 | BT_HIDDEN | |
14f28187 | 1722 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1723 | { |
14f28187 FD |
1724 | void *data = bt_self_component_get_data( |
1725 | bt_self_component_source_as_self_component(component)); | |
7cdc2bab MD |
1726 | |
1727 | if (!data) { | |
1728 | return; | |
1729 | } | |
1730 | lttng_live_component_destroy_data(data); | |
1731 | } | |
1732 | ||
1733 | static | |
14f28187 FD |
1734 | enum session_not_found_action parse_session_not_found_action_param( |
1735 | const bt_value *no_session_param) | |
1736 | { | |
1737 | enum session_not_found_action action; | |
1738 | const char *no_session_act_str; | |
1739 | no_session_act_str = bt_value_string_get(no_session_param); | |
1740 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { | |
1741 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1742 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1743 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
1744 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0) { | |
1745 | action = SESSION_NOT_FOUND_ACTION_END; | |
1746 | } else { | |
bce81ff2 | 1747 | action = SESSION_NOT_FOUND_ACTION_UNKNOWN; |
14f28187 FD |
1748 | } |
1749 | ||
1750 | return action; | |
1751 | } | |
1752 | ||
c01594de | 1753 | struct lttng_live_component *lttng_live_component_create(const bt_value *params, |
2ece7dd0 | 1754 | bt_logging_level log_level, bt_self_component *self_comp) |
7cdc2bab MD |
1755 | { |
1756 | struct lttng_live_component *lttng_live; | |
312df793 PP |
1757 | const bt_value *inputs_value; |
1758 | const bt_value *url_value; | |
1759 | const bt_value *value; | |
7cdc2bab | 1760 | const char *url; |
7cdc2bab MD |
1761 | |
1762 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1763 | if (!lttng_live) { | |
1764 | goto end; | |
1765 | } | |
c01594de | 1766 | lttng_live->log_level = log_level; |
2ece7dd0 | 1767 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1768 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
1769 | lttng_live->has_msg_iter = false; |
1770 | ||
312df793 PP |
1771 | inputs_value = bt_value_map_borrow_entry_value_const(params, |
1772 | INPUTS_PARAM); | |
1773 | if (!inputs_value) { | |
1774 | BT_COMP_LOGE("Mandatory `%s` parameter missing", INPUTS_PARAM); | |
1775 | goto error; | |
1776 | } | |
1777 | ||
1778 | if (!bt_value_is_array(inputs_value)) { | |
1779 | BT_COMP_LOGE("`%s` parameter is required to be an array value", | |
1780 | INPUTS_PARAM); | |
1781 | goto error; | |
1782 | } | |
1783 | ||
1784 | if (bt_value_array_get_length(inputs_value) != 1) { | |
1785 | BT_COMP_LOGE("`%s` parameter's length is required to be 1", | |
1786 | INPUTS_PARAM); | |
1787 | goto error; | |
1788 | } | |
1789 | ||
1790 | url_value = bt_value_array_borrow_element_by_index_const(inputs_value, | |
1791 | 0); | |
1792 | BT_ASSERT(url_value); | |
1793 | ||
1794 | if (!bt_value_is_string(url_value)) { | |
1795 | BT_COMP_LOGE("First element of `%s` parameter is required to be a string value (URL)", | |
1796 | INPUTS_PARAM); | |
7cdc2bab MD |
1797 | goto error; |
1798 | } | |
312df793 PP |
1799 | |
1800 | url = bt_value_string_get(url_value); | |
14f28187 FD |
1801 | lttng_live->params.url = g_string_new(url); |
1802 | if (!lttng_live->params.url) { | |
7cdc2bab MD |
1803 | goto error; |
1804 | } | |
14f28187 FD |
1805 | |
1806 | value = bt_value_map_borrow_entry_value_const(params, | |
1807 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 PP |
1808 | if (value) { |
1809 | if (!bt_value_is_string(value)) { | |
1810 | BT_COMP_LOGE("`%s` parameter is required to be a string value", | |
1811 | SESS_NOT_FOUND_ACTION_PARAM); | |
1812 | goto error; | |
1813 | } | |
14f28187 | 1814 | |
14f28187 FD |
1815 | lttng_live->params.sess_not_found_act = |
1816 | parse_session_not_found_action_param(value); | |
bce81ff2 | 1817 | if (lttng_live->params.sess_not_found_act == SESSION_NOT_FOUND_ACTION_UNKNOWN) { |
2ece7dd0 | 1818 | BT_COMP_LOGE("Unexpected value for `%s` parameter: " |
14f28187 FD |
1819 | "value=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, |
1820 | bt_value_string_get(value)); | |
1821 | goto error; | |
1822 | } | |
1823 | } else { | |
312df793 PP |
1824 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1825 | "defaulting to `%s`.", | |
14f28187 FD |
1826 | SESS_NOT_FOUND_ACTION_PARAM, |
1827 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1828 | lttng_live->params.sess_not_found_act = | |
1829 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1830 | } |
4c66436f | 1831 | |
7cdc2bab MD |
1832 | goto end; |
1833 | ||
1834 | error: | |
1835 | lttng_live_component_destroy_data(lttng_live); | |
1836 | lttng_live = NULL; | |
1837 | end: | |
1838 | return lttng_live; | |
d3e4dcd8 PP |
1839 | } |
1840 | ||
f3bc2010 | 1841 | BT_HIDDEN |
d24d5663 | 1842 | bt_component_class_init_method_status lttng_live_component_init( |
c01594de | 1843 | bt_self_component_source *self_comp_src, |
59225a3e SM |
1844 | bt_self_component_source_configuration *config, |
1845 | const bt_value *params, | |
1846 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1847 | { |
7cdc2bab | 1848 | struct lttng_live_component *lttng_live; |
d24d5663 PP |
1849 | bt_component_class_init_method_status ret = |
1850 | BT_COMPONENT_CLASS_INIT_METHOD_STATUS_OK; | |
c01594de PP |
1851 | bt_self_component *self_comp = |
1852 | bt_self_component_source_as_self_component(self_comp_src); | |
1853 | bt_logging_level log_level = bt_component_get_logging_level( | |
1854 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 1855 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1856 | |
2ece7dd0 | 1857 | lttng_live = lttng_live_component_create(params, log_level, self_comp); |
7cdc2bab | 1858 | if (!lttng_live) { |
d24d5663 | 1859 | ret = BT_COMPONENT_CLASS_INIT_METHOD_STATUS_MEMORY_ERROR; |
19bdff20 | 1860 | goto error; |
7cdc2bab MD |
1861 | } |
1862 | ||
d24d5663 PP |
1863 | add_port_status = bt_self_component_source_add_output_port( |
1864 | self_comp_src, "out", NULL, NULL); | |
1865 | switch (add_port_status) { | |
1866 | case BT_SELF_COMPONENT_ADD_PORT_STATUS_ERROR: | |
1867 | ret = BT_COMPONENT_CLASS_INIT_METHOD_STATUS_ERROR; | |
1868 | goto error; | |
1869 | case BT_SELF_COMPONENT_ADD_PORT_STATUS_MEMORY_ERROR: | |
1870 | ret = BT_COMPONENT_CLASS_INIT_METHOD_STATUS_MEMORY_ERROR; | |
19bdff20 | 1871 | goto error; |
d24d5663 PP |
1872 | default: |
1873 | break; | |
147337a3 | 1874 | } |
7cdc2bab | 1875 | |
c01594de | 1876 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 1877 | goto end; |
7cdc2bab | 1878 | |
19bdff20 FD |
1879 | error: |
1880 | lttng_live_component_destroy_data(lttng_live); | |
1881 | lttng_live = NULL; | |
7cdc2bab MD |
1882 | end: |
1883 | return ret; | |
d85ef162 | 1884 | } |