Commit | Line | Data |
---|---|---|
f3bc2010 JG |
1 | /* |
2 | * lttng-live.c | |
3 | * | |
4 | * Babeltrace CTF LTTng-live Client Component | |
5 | * | |
6 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
7cdc2bab | 7 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 JG |
8 | * |
9 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
10 | * | |
11 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
12 | * of this software and associated documentation files (the "Software"), to deal | |
13 | * in the Software without restriction, including without limitation the rights | |
14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
15 | * copies of the Software, and to permit persons to whom the Software is | |
16 | * furnished to do so, subject to the following conditions: | |
17 | * | |
18 | * The above copyright notice and this permission notice shall be included in | |
19 | * all copies or substantial portions of the Software. | |
20 | * | |
21 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
22 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
23 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
24 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
25 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
26 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
27 | * SOFTWARE. | |
28 | */ | |
29 | ||
020bc26f PP |
30 | #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE-SRC" |
31 | #include "logging.h" | |
32 | ||
7cdc2bab | 33 | #include <babeltrace/ctf-ir/packet.h> |
b2e0c907 | 34 | #include <babeltrace/graph/component-source.h> |
7cdc2bab MD |
35 | #include <babeltrace/graph/private-port.h> |
36 | #include <babeltrace/graph/port.h> | |
37 | #include <babeltrace/graph/private-component.h> | |
38 | #include <babeltrace/graph/private-component-source.h> | |
39 | #include <babeltrace/graph/private-notification-iterator.h> | |
40 | #include <babeltrace/graph/notification-stream.h> | |
41 | #include <babeltrace/graph/notification-packet.h> | |
42 | #include <babeltrace/graph/notification-event.h> | |
43 | #include <babeltrace/graph/notification-heap.h> | |
44 | #include <babeltrace/graph/notification-iterator.h> | |
45 | #include <babeltrace/graph/notification-inactivity.h> | |
4c66436f | 46 | #include <babeltrace/graph/graph.h> |
7cdc2bab MD |
47 | #include <babeltrace/compiler-internal.h> |
48 | #include <inttypes.h> | |
49 | #include <glib.h> | |
50 | #include <assert.h> | |
51 | #include <unistd.h> | |
7d61fa8e | 52 | #include <plugins-common.h> |
f3bc2010 | 53 | |
7cdc2bab MD |
54 | #include "data-stream.h" |
55 | #include "metadata.h" | |
0f5e83e5 | 56 | #include "lttng-live-internal.h" |
7cdc2bab | 57 | |
7cdc2bab | 58 | #define MAX_QUERY_SIZE (256*1024) |
7cdc2bab | 59 | |
087bc060 | 60 | #define print_dbg(fmt, ...) BT_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab MD |
61 | |
62 | static const char *print_state(struct lttng_live_stream_iterator *s) | |
63 | { | |
64 | switch (s->state) { | |
65 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
66 | return "ACTIVE_NO_DATA"; | |
67 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
68 | return "QUIESCENT_NO_DATA"; | |
69 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
70 | return "QUIESCENT"; | |
71 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
72 | return "ACTIVE_DATA"; | |
73 | case LTTNG_LIVE_STREAM_EOF: | |
74 | return "EOF"; | |
75 | default: | |
76 | return "ERROR"; | |
77 | } | |
78 | } | |
7cdc2bab MD |
79 | |
80 | #define print_stream_state(stream) \ | |
81 | print_dbg("stream %s state %s last_inact_ts %" PRId64 " cur_inact_ts %" PRId64, \ | |
82 | bt_port_get_name(bt_port_from_private_port(stream->port)), \ | |
83 | print_state(stream), stream->last_returned_inactivity_timestamp, \ | |
84 | stream->current_inactivity_timestamp) | |
85 | ||
7cdc2bab MD |
86 | BT_HIDDEN |
87 | int lttng_live_add_port(struct lttng_live_component *lttng_live, | |
88 | struct lttng_live_stream_iterator *stream_iter) | |
89 | { | |
90 | int ret; | |
91 | struct bt_private_port *private_port; | |
92 | char name[STREAM_NAME_MAX_LEN]; | |
93 | ||
94 | ret = sprintf(name, STREAM_NAME_PREFIX "%" PRIu64, stream_iter->viewer_stream_id); | |
95 | assert(ret > 0); | |
96 | strcpy(stream_iter->name, name); | |
147337a3 PP |
97 | ret = bt_private_component_source_add_output_private_port( |
98 | lttng_live->private_component, name, stream_iter, | |
99 | &private_port); | |
100 | if (ret) { | |
7cdc2bab MD |
101 | return -1; |
102 | } | |
087bc060 | 103 | BT_LOGI("Added port %s", name); |
7cdc2bab MD |
104 | |
105 | if (lttng_live->no_stream_port) { | |
106 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
107 | if (ret) { | |
108 | return -1; | |
109 | } | |
110 | BT_PUT(lttng_live->no_stream_port); | |
111 | lttng_live->no_stream_iter->port = NULL; | |
112 | } | |
113 | stream_iter->port = private_port; | |
114 | return 0; | |
115 | } | |
116 | ||
117 | BT_HIDDEN | |
118 | int lttng_live_remove_port(struct lttng_live_component *lttng_live, | |
119 | struct bt_private_port *port) | |
120 | { | |
121 | struct bt_component *component; | |
122 | int64_t nr_ports; | |
123 | int ret; | |
124 | ||
125 | component = bt_component_from_private_component(lttng_live->private_component); | |
126 | nr_ports = bt_component_source_get_output_port_count(component); | |
127 | if (nr_ports < 0) { | |
128 | return -1; | |
129 | } | |
130 | BT_PUT(component); | |
131 | if (nr_ports == 1) { | |
132 | assert(!lttng_live->no_stream_port); | |
147337a3 PP |
133 | ret = bt_private_component_source_add_output_private_port(lttng_live->private_component, |
134 | "no-stream", lttng_live->no_stream_iter, | |
135 | <tng_live->no_stream_port); | |
136 | if (ret) { | |
7cdc2bab MD |
137 | return -1; |
138 | } | |
139 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; | |
140 | } | |
141 | ret = bt_private_port_remove_from_component(port); | |
142 | if (ret) { | |
143 | return -1; | |
144 | } | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static | |
149 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
150 | uint64_t trace_id) | |
d3e4dcd8 | 151 | { |
7cdc2bab MD |
152 | struct lttng_live_trace *trace; |
153 | ||
154 | bt_list_for_each_entry(trace, &session->traces, node) { | |
155 | if (trace->id == trace_id) { | |
156 | return trace; | |
157 | } | |
158 | } | |
d3eb6e8f PP |
159 | return NULL; |
160 | } | |
161 | ||
7cdc2bab MD |
162 | static |
163 | void lttng_live_destroy_trace(struct bt_object *obj) | |
164 | { | |
165 | struct lttng_live_trace *trace = container_of(obj, struct lttng_live_trace, obj); | |
5bd230f4 | 166 | int retval; |
7cdc2bab | 167 | |
087bc060 | 168 | BT_LOGI("Destroy trace"); |
7cdc2bab MD |
169 | assert(bt_list_empty(&trace->streams)); |
170 | bt_list_del(&trace->node); | |
5bd230f4 MD |
171 | |
172 | retval = bt_ctf_trace_set_is_static(trace->trace); | |
173 | assert(!retval); | |
174 | ||
7cdc2bab MD |
175 | lttng_live_metadata_fini(trace); |
176 | BT_PUT(trace->cc_prio_map); | |
177 | g_free(trace); | |
178 | } | |
179 | ||
180 | static | |
181 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
182 | uint64_t trace_id) | |
183 | { | |
184 | struct lttng_live_trace *trace = NULL; | |
185 | ||
186 | trace = g_new0(struct lttng_live_trace, 1); | |
187 | if (!trace) { | |
188 | goto error; | |
189 | } | |
190 | trace->session = session; | |
191 | trace->id = trace_id; | |
192 | BT_INIT_LIST_HEAD(&trace->streams); | |
193 | trace->new_metadata_needed = true; | |
194 | bt_list_add(&trace->node, &session->traces); | |
195 | bt_object_init(&trace->obj, lttng_live_destroy_trace); | |
087bc060 | 196 | BT_LOGI("Create trace"); |
7cdc2bab MD |
197 | goto end; |
198 | error: | |
199 | g_free(trace); | |
200 | trace = NULL; | |
201 | end: | |
202 | return trace; | |
203 | } | |
204 | ||
205 | BT_HIDDEN | |
206 | struct lttng_live_trace *lttng_live_ref_trace(struct lttng_live_session *session, | |
207 | uint64_t trace_id) | |
208 | { | |
209 | struct lttng_live_trace *trace; | |
210 | ||
211 | trace = lttng_live_find_trace(session, trace_id); | |
212 | if (trace) { | |
213 | bt_get(trace); | |
214 | return trace; | |
215 | } | |
216 | return lttng_live_create_trace(session, trace_id); | |
217 | } | |
218 | ||
219 | BT_HIDDEN | |
220 | void lttng_live_unref_trace(struct lttng_live_trace *trace) | |
221 | { | |
222 | bt_put(trace); | |
223 | } | |
224 | ||
225 | static | |
226 | void lttng_live_close_trace_streams(struct lttng_live_trace *trace) | |
227 | { | |
228 | struct lttng_live_stream_iterator *stream, *s; | |
229 | ||
230 | bt_list_for_each_entry_safe(stream, s, &trace->streams, node) { | |
231 | lttng_live_stream_iterator_destroy(stream); | |
232 | } | |
233 | lttng_live_metadata_fini(trace); | |
234 | } | |
235 | ||
236 | BT_HIDDEN | |
06994c71 MD |
237 | int lttng_live_add_session(struct lttng_live_component *lttng_live, |
238 | uint64_t session_id, const char *hostname, | |
239 | const char *session_name) | |
7cdc2bab MD |
240 | { |
241 | int ret = 0; | |
242 | struct lttng_live_session *s; | |
243 | ||
244 | s = g_new0(struct lttng_live_session, 1); | |
245 | if (!s) { | |
246 | goto error; | |
247 | } | |
248 | ||
249 | s->id = session_id; | |
250 | BT_INIT_LIST_HEAD(&s->traces); | |
251 | s->lttng_live = lttng_live; | |
252 | s->new_streams_needed = true; | |
06994c71 MD |
253 | s->hostname = g_string_new(hostname); |
254 | s->session_name = g_string_new(session_name); | |
7cdc2bab | 255 | |
06994c71 MD |
256 | BT_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
257 | s->id, hostname, session_name); | |
7cdc2bab MD |
258 | bt_list_add(&s->node, <tng_live->sessions); |
259 | goto end; | |
260 | error: | |
087bc060 | 261 | BT_LOGE("Error adding session"); |
7cdc2bab MD |
262 | g_free(s); |
263 | ret = -1; | |
264 | end: | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static | |
269 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
270 | { | |
271 | struct lttng_live_trace *trace, *t; | |
272 | ||
087bc060 | 273 | BT_LOGI("Destroy session"); |
7cdc2bab MD |
274 | if (session->id != -1ULL) { |
275 | if (lttng_live_detach_session(session)) { | |
4c66436f MD |
276 | if (!bt_graph_is_canceled(session->lttng_live->graph)) { |
277 | /* Old relayd cannot detach sessions. */ | |
278 | BT_LOGD("Unable to detach session %" PRIu64, | |
279 | session->id); | |
280 | } | |
7cdc2bab MD |
281 | } |
282 | session->id = -1ULL; | |
283 | } | |
284 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
285 | lttng_live_close_trace_streams(trace); | |
286 | } | |
287 | bt_list_del(&session->node); | |
06994c71 MD |
288 | if (session->hostname) { |
289 | g_string_free(session->hostname, TRUE); | |
290 | } | |
291 | if (session->session_name) { | |
292 | g_string_free(session->session_name, TRUE); | |
293 | } | |
7cdc2bab MD |
294 | g_free(session); |
295 | } | |
296 | ||
297 | BT_HIDDEN | |
298 | void lttng_live_iterator_finalize(struct bt_private_notification_iterator *it) | |
299 | { | |
300 | struct lttng_live_stream_iterator_generic *s = | |
301 | bt_private_notification_iterator_get_user_data(it); | |
302 | ||
303 | switch (s->type) { | |
304 | case LIVE_STREAM_TYPE_NO_STREAM: | |
305 | { | |
306 | /* Leave no_stream_iter in place when port is removed. */ | |
307 | break; | |
308 | } | |
309 | case LIVE_STREAM_TYPE_STREAM: | |
310 | { | |
311 | struct lttng_live_stream_iterator *stream_iter = | |
312 | container_of(s, struct lttng_live_stream_iterator, p); | |
313 | ||
314 | lttng_live_stream_iterator_destroy(stream_iter); | |
315 | break; | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | static | |
321 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( | |
322 | struct lttng_live_component *lttng_live, | |
323 | struct lttng_live_stream_iterator *lttng_live_stream) | |
324 | { | |
325 | switch (lttng_live_stream->state) { | |
326 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
327 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
328 | break; | |
329 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
330 | /* Invalid state. */ | |
087bc060 MD |
331 | BT_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
332 | abort(); | |
7cdc2bab MD |
333 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
334 | /* Invalid state. */ | |
087bc060 MD |
335 | BT_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
336 | abort(); | |
7cdc2bab MD |
337 | case LTTNG_LIVE_STREAM_EOF: |
338 | break; | |
339 | } | |
340 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
341 | } | |
342 | ||
343 | /* | |
344 | * For active no data stream, fetch next data. It can be either: | |
345 | * - quiescent: need to put it in the prio heap at quiescent end | |
346 | * timestamp, | |
347 | * - have data: need to wire up first event into the prio heap, | |
348 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
349 | * return EOF. | |
350 | */ | |
351 | static | |
352 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( | |
353 | struct lttng_live_component *lttng_live, | |
354 | struct lttng_live_stream_iterator *lttng_live_stream) | |
355 | { | |
356 | enum bt_ctf_lttng_live_iterator_status ret = | |
357 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
358 | struct packet_index index; | |
359 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; | |
360 | ||
361 | if (lttng_live_stream->trace->new_metadata_needed) { | |
362 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
363 | goto end; | |
364 | } | |
365 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
366 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
367 | goto end; | |
368 | } | |
369 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA | |
370 | && lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
371 | goto end; | |
372 | } | |
373 | ret = lttng_live_get_next_index(lttng_live, lttng_live_stream, &index); | |
374 | if (ret != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
375 | goto end; | |
376 | } | |
377 | assert(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); | |
378 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { | |
379 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA | |
380 | && lttng_live_stream->last_returned_inactivity_timestamp == | |
381 | lttng_live_stream->current_inactivity_timestamp) { | |
382 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
383 | print_stream_state(lttng_live_stream); | |
384 | } else { | |
385 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
386 | } | |
387 | goto end; | |
388 | } | |
389 | lttng_live_stream->base_offset = index.offset; | |
390 | lttng_live_stream->offset = index.offset; | |
391 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
392 | end: | |
393 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
394 | ret = lttng_live_iterator_next_check_stream_state( | |
395 | lttng_live, lttng_live_stream); | |
396 | } | |
397 | return ret; | |
398 | } | |
399 | ||
400 | /* | |
401 | * Creation of the notification requires the ctf trace to be created | |
402 | * beforehand, but the live protocol gives us all streams (including | |
403 | * metadata) at once. So we split it in three steps: getting streams, | |
404 | * getting metadata (which creates the ctf trace), and then creating the | |
405 | * per-stream notifications. | |
406 | */ | |
407 | static | |
408 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_session( | |
409 | struct lttng_live_component *lttng_live, | |
410 | struct lttng_live_session *session) | |
411 | { | |
412 | enum bt_ctf_lttng_live_iterator_status status; | |
413 | struct lttng_live_trace *trace, *t; | |
414 | ||
415 | if (lttng_live_attach_session(session)) { | |
4c66436f MD |
416 | if (bt_graph_is_canceled(lttng_live->graph)) { |
417 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
418 | } else { | |
419 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
420 | } | |
7cdc2bab MD |
421 | } |
422 | status = lttng_live_get_new_streams(session); | |
423 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && | |
424 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
425 | return status; | |
426 | } | |
427 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
428 | status = lttng_live_metadata_update(trace); | |
5bd230f4 MD |
429 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && |
430 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
431 | return status; |
432 | } | |
433 | } | |
434 | return lttng_live_lazy_notif_init(session); | |
435 | } | |
436 | ||
437 | BT_HIDDEN | |
438 | void lttng_live_need_new_streams(struct lttng_live_component *lttng_live) | |
439 | { | |
440 | struct lttng_live_session *session; | |
441 | ||
442 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
443 | session->new_streams_needed = true; | |
444 | } | |
445 | } | |
446 | ||
447 | static | |
448 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_component *lttng_live) | |
449 | { | |
450 | struct lttng_live_session *session; | |
451 | ||
452 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
453 | struct lttng_live_trace *trace; | |
454 | ||
455 | session->new_streams_needed = true; | |
456 | bt_list_for_each_entry(trace, &session->traces, node) { | |
457 | trace->new_metadata_needed = true; | |
458 | } | |
459 | } | |
460 | } | |
461 | ||
462 | static | |
3cdf4234 | 463 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_new_streams_and_metadata( |
7cdc2bab MD |
464 | struct lttng_live_component *lttng_live) |
465 | { | |
466 | enum bt_ctf_lttng_live_iterator_status ret = | |
467 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
468 | unsigned int nr_sessions_opened = 0; | |
469 | struct lttng_live_session *session, *s; | |
470 | ||
471 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
472 | if (session->closed && bt_list_empty(&session->traces)) { | |
473 | lttng_live_destroy_session(session); | |
474 | } | |
475 | } | |
476 | /* | |
477 | * Currently, when there are no sessions, we quit immediately. | |
478 | * We may want to add a component parameter to keep trying until | |
479 | * we get data in the future. | |
480 | * Also, in a remotely distant future, we could add a "new | |
481 | * session" flag to the protocol, which would tell us that we | |
482 | * need to query for new sessions even though we have sessions | |
483 | * currently ongoing. | |
484 | */ | |
485 | if (bt_list_empty(<tng_live->sessions)) { | |
486 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
487 | goto end; | |
488 | } | |
489 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
490 | ret = lttng_live_get_session(lttng_live, session); | |
491 | switch (ret) { | |
492 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
493 | break; | |
494 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
495 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
496 | break; | |
497 | default: | |
498 | goto end; | |
499 | } | |
500 | if (!session->closed) { | |
501 | nr_sessions_opened++; | |
502 | } | |
503 | } | |
504 | end: | |
505 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && !nr_sessions_opened) { | |
506 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
507 | } | |
508 | return ret; | |
509 | } | |
510 | ||
511 | static | |
512 | enum bt_ctf_lttng_live_iterator_status emit_inactivity_notification( | |
513 | struct lttng_live_component *lttng_live, | |
514 | struct lttng_live_stream_iterator *lttng_live_stream, | |
515 | struct bt_notification **notification, | |
516 | uint64_t timestamp) | |
517 | { | |
518 | enum bt_ctf_lttng_live_iterator_status ret = | |
519 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
520 | struct lttng_live_trace *trace; | |
521 | struct bt_ctf_clock_class *clock_class = NULL; | |
522 | struct bt_ctf_clock_value *clock_value = NULL; | |
523 | struct bt_notification *notif = NULL; | |
524 | int retval; | |
525 | ||
526 | trace = lttng_live_stream->trace; | |
527 | if (!trace) { | |
528 | goto error; | |
529 | } | |
530 | clock_class = bt_clock_class_priority_map_get_clock_class_by_index(trace->cc_prio_map, 0); | |
531 | if (!clock_class) { | |
532 | goto error; | |
533 | } | |
534 | clock_value = bt_ctf_clock_value_create(clock_class, timestamp); | |
535 | if (!clock_value) { | |
536 | goto error; | |
537 | } | |
538 | notif = bt_notification_inactivity_create(trace->cc_prio_map); | |
539 | if (!notif) { | |
540 | goto error; | |
541 | } | |
542 | retval = bt_notification_inactivity_set_clock_value(notif, clock_value); | |
543 | if (retval) { | |
544 | goto error; | |
545 | } | |
546 | *notification = notif; | |
547 | end: | |
548 | bt_put(clock_value); | |
549 | bt_put(clock_class); | |
550 | return ret; | |
551 | ||
552 | error: | |
553 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
554 | bt_put(notif); | |
555 | goto end; | |
556 | } | |
557 | ||
558 | static | |
559 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( | |
560 | struct lttng_live_component *lttng_live, | |
561 | struct lttng_live_stream_iterator *lttng_live_stream, | |
562 | struct bt_notification **notification) | |
563 | { | |
564 | enum bt_ctf_lttng_live_iterator_status ret = | |
565 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
566 | struct bt_ctf_clock_class *clock_class = NULL; | |
567 | struct bt_ctf_clock_value *clock_value = NULL; | |
568 | ||
569 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
570 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
571 | } | |
572 | ||
573 | if (lttng_live_stream->current_inactivity_timestamp == | |
574 | lttng_live_stream->last_returned_inactivity_timestamp) { | |
575 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; | |
576 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
577 | goto end; | |
578 | } | |
579 | ||
580 | ret = emit_inactivity_notification(lttng_live, lttng_live_stream, notification, | |
581 | (uint64_t) lttng_live_stream->current_inactivity_timestamp); | |
582 | ||
583 | lttng_live_stream->last_returned_inactivity_timestamp = | |
584 | lttng_live_stream->current_inactivity_timestamp; | |
585 | end: | |
586 | bt_put(clock_value); | |
587 | bt_put(clock_class); | |
588 | return ret; | |
589 | } | |
590 | ||
591 | static | |
592 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( | |
593 | struct lttng_live_component *lttng_live, | |
594 | struct lttng_live_stream_iterator *lttng_live_stream, | |
595 | struct bt_notification **notification) | |
596 | { | |
597 | enum bt_ctf_lttng_live_iterator_status ret = | |
598 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
599 | enum bt_ctf_notif_iter_status status; | |
600 | struct lttng_live_session *session; | |
601 | ||
602 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
603 | struct lttng_live_trace *trace; | |
604 | ||
605 | if (session->new_streams_needed) { | |
606 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
607 | } | |
608 | bt_list_for_each_entry(trace, &session->traces, node) { | |
609 | if (trace->new_metadata_needed) { | |
610 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
611 | } | |
612 | } | |
613 | } | |
614 | ||
615 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
616 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
617 | } | |
618 | if (lttng_live_stream->packet_end_notif_queue) { | |
619 | *notification = lttng_live_stream->packet_end_notif_queue; | |
620 | lttng_live_stream->packet_end_notif_queue = NULL; | |
621 | status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
622 | } else { | |
623 | status = bt_ctf_notif_iter_get_next_notification( | |
624 | lttng_live_stream->notif_iter, | |
625 | lttng_live_stream->trace->cc_prio_map, | |
626 | notification); | |
627 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { | |
628 | /* | |
629 | * Consider empty packets as inactivity. | |
630 | */ | |
631 | if (bt_notification_get_type(*notification) == BT_NOTIFICATION_TYPE_PACKET_END) { | |
632 | lttng_live_stream->packet_end_notif_queue = *notification; | |
633 | *notification = NULL; | |
634 | return emit_inactivity_notification(lttng_live, | |
635 | lttng_live_stream, notification, | |
636 | lttng_live_stream->current_packet_end_timestamp); | |
637 | } | |
638 | } | |
639 | } | |
640 | switch (status) { | |
641 | case BT_CTF_NOTIF_ITER_STATUS_EOF: | |
642 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
643 | break; | |
644 | case BT_CTF_NOTIF_ITER_STATUS_OK: | |
645 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
646 | break; | |
647 | case BT_CTF_NOTIF_ITER_STATUS_AGAIN: | |
648 | /* | |
649 | * Continue immediately (end of packet). The next | |
650 | * get_index may return AGAIN to delay the following | |
651 | * attempt. | |
652 | */ | |
653 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
654 | break; | |
655 | case BT_CTF_NOTIF_ITER_STATUS_INVAL: | |
656 | /* No argument provided by the user, so don't return INVAL. */ | |
657 | case BT_CTF_NOTIF_ITER_STATUS_ERROR: | |
658 | default: | |
659 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
660 | break; | |
661 | } | |
662 | return ret; | |
663 | } | |
664 | ||
665 | /* | |
666 | * helper function: | |
667 | * handle_no_data_streams() | |
668 | * retry: | |
669 | * - for each ACTIVE_NO_DATA stream: | |
670 | * - query relayd for stream data, or quiescence info. | |
671 | * - if need metadata, get metadata, goto retry. | |
672 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
673 | * - if quiescent, move to QUIESCENT streams | |
674 | * - if fetched data, move to ACTIVE_DATA streams | |
675 | * (at this point each stream either has data, or is quiescent) | |
676 | * | |
677 | * | |
678 | * iterator_next: | |
679 | * handle_new_streams_and_metadata() | |
680 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
681 | * - query relayd for metadata | |
682 | * | |
683 | * call handle_active_no_data_streams() | |
684 | * | |
685 | * handle_quiescent_streams() | |
686 | * - if at least one stream is ACTIVE_DATA: | |
687 | * - peek stream event with lowest timestamp -> next_ts | |
688 | * - for each quiescent stream | |
689 | * - if next_ts >= quiescent end | |
690 | * - set state to ACTIVE_NO_DATA | |
691 | * - else | |
692 | * - for each quiescent stream | |
693 | * - set state to ACTIVE_NO_DATA | |
694 | * | |
695 | * call handle_active_no_data_streams() | |
696 | * | |
697 | * handle_active_data_streams() | |
698 | * - if at least one stream is ACTIVE_DATA: | |
699 | * - get stream event with lowest timestamp from heap | |
700 | * - make that stream event the current notification. | |
701 | * - move this stream heap position to its next event | |
702 | * - if we need to fetch data from relayd, move | |
703 | * stream to ACTIVE_NO_DATA. | |
704 | * - return OK | |
705 | * - return AGAIN | |
706 | * | |
707 | * end criterion: ctrl-c on client. If relayd exits or the session | |
708 | * closes on the relay daemon side, we keep on waiting for streams. | |
709 | * Eventually handle --end timestamp (also an end criterion). | |
710 | * | |
711 | * When disconnected from relayd: try to re-connect endlessly. | |
712 | */ | |
713 | static | |
714 | struct bt_notification_iterator_next_return lttng_live_iterator_next_stream( | |
715 | struct bt_private_notification_iterator *iterator, | |
716 | struct lttng_live_stream_iterator *stream_iter) | |
717 | { | |
718 | enum bt_ctf_lttng_live_iterator_status status; | |
719 | struct bt_notification_iterator_next_return next_return; | |
720 | struct lttng_live_component *lttng_live; | |
721 | ||
722 | lttng_live = stream_iter->trace->session->lttng_live; | |
723 | retry: | |
724 | print_stream_state(stream_iter); | |
725 | next_return.notification = NULL; | |
726 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
727 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
728 | goto end; | |
729 | } | |
730 | status = lttng_live_iterator_next_handle_one_no_data_stream( | |
731 | lttng_live, stream_iter); | |
732 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
733 | goto end; | |
734 | } | |
735 | status = lttng_live_iterator_next_handle_one_quiescent_stream( | |
736 | lttng_live, stream_iter, &next_return.notification); | |
737 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
738 | assert(next_return.notification == NULL); | |
739 | goto end; | |
740 | } | |
741 | if (next_return.notification) { | |
742 | goto end; | |
743 | } | |
744 | status = lttng_live_iterator_next_handle_one_active_data_stream(lttng_live, | |
745 | stream_iter, &next_return.notification); | |
746 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
747 | assert(next_return.notification == NULL); | |
748 | } | |
749 | ||
750 | end: | |
751 | switch (status) { | |
752 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
753 | print_dbg("continue"); | |
754 | goto retry; | |
755 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
756 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
757 | print_dbg("again"); | |
758 | break; | |
759 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
760 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
761 | print_dbg("end"); | |
762 | break; | |
763 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
764 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
765 | print_dbg("ok"); | |
766 | break; | |
767 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
768 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
769 | break; | |
770 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
771 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
772 | break; | |
773 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
774 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
775 | break; | |
776 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
777 | default: /* fall-through */ | |
778 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
779 | break; | |
780 | } | |
781 | return next_return; | |
782 | } | |
783 | ||
784 | static | |
785 | struct bt_notification_iterator_next_return lttng_live_iterator_next_no_stream( | |
786 | struct bt_private_notification_iterator *iterator, | |
787 | struct lttng_live_no_stream_iterator *no_stream_iter) | |
788 | { | |
789 | enum bt_ctf_lttng_live_iterator_status status; | |
790 | struct bt_notification_iterator_next_return next_return; | |
791 | struct lttng_live_component *lttng_live; | |
792 | ||
793 | lttng_live = no_stream_iter->lttng_live; | |
794 | retry: | |
795 | lttng_live_force_new_streams_and_metadata(lttng_live); | |
796 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
797 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
798 | goto end; | |
799 | } | |
800 | if (no_stream_iter->port) { | |
801 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
802 | } else { | |
803 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
804 | } | |
805 | end: | |
806 | switch (status) { | |
807 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
808 | goto retry; | |
809 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
810 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
811 | break; | |
812 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
813 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
814 | break; | |
815 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
816 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
817 | break; | |
818 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
819 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
820 | break; | |
821 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
822 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
823 | break; | |
824 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
825 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
826 | break; | |
827 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
828 | default: /* fall-through */ | |
829 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
830 | break; | |
831 | } | |
832 | return next_return; | |
833 | } | |
834 | ||
d3eb6e8f | 835 | BT_HIDDEN |
41a2b7ae | 836 | struct bt_notification_iterator_next_return lttng_live_iterator_next( |
890882ef | 837 | struct bt_private_notification_iterator *iterator) |
d3eb6e8f | 838 | { |
7cdc2bab MD |
839 | struct lttng_live_stream_iterator_generic *s = |
840 | bt_private_notification_iterator_get_user_data(iterator); | |
841 | struct bt_notification_iterator_next_return next_return; | |
842 | ||
843 | switch (s->type) { | |
844 | case LIVE_STREAM_TYPE_NO_STREAM: | |
845 | next_return = lttng_live_iterator_next_no_stream(iterator, | |
846 | container_of(s, struct lttng_live_no_stream_iterator, p)); | |
847 | break; | |
848 | case LIVE_STREAM_TYPE_STREAM: | |
849 | next_return = lttng_live_iterator_next_stream(iterator, | |
850 | container_of(s, struct lttng_live_stream_iterator, p)); | |
851 | break; | |
852 | default: | |
853 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
854 | break; | |
855 | } | |
856 | return next_return; | |
857 | } | |
41a2b7ae | 858 | |
7cdc2bab MD |
859 | BT_HIDDEN |
860 | enum bt_notification_iterator_status lttng_live_iterator_init( | |
861 | struct bt_private_notification_iterator *it, | |
862 | struct bt_private_port *port) | |
863 | { | |
864 | enum bt_notification_iterator_status ret = | |
865 | BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
866 | struct lttng_live_stream_iterator_generic *s; | |
7cdc2bab MD |
867 | |
868 | assert(it); | |
869 | ||
870 | s = bt_private_port_get_user_data(port); | |
871 | assert(s); | |
872 | switch (s->type) { | |
873 | case LIVE_STREAM_TYPE_NO_STREAM: | |
874 | { | |
875 | struct lttng_live_no_stream_iterator *no_stream_iter = | |
876 | container_of(s, struct lttng_live_no_stream_iterator, p); | |
7cdc2bab MD |
877 | ret = bt_private_notification_iterator_set_user_data(it, no_stream_iter); |
878 | if (ret) { | |
879 | goto error; | |
880 | } | |
881 | break; | |
882 | } | |
883 | case LIVE_STREAM_TYPE_STREAM: | |
884 | { | |
885 | struct lttng_live_stream_iterator *stream_iter = | |
886 | container_of(s, struct lttng_live_stream_iterator, p); | |
7cdc2bab MD |
887 | ret = bt_private_notification_iterator_set_user_data(it, stream_iter); |
888 | if (ret) { | |
889 | goto error; | |
890 | } | |
891 | break; | |
892 | } | |
893 | default: | |
894 | ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
895 | goto end; | |
896 | } | |
897 | ||
898 | end: | |
41a2b7ae | 899 | return ret; |
7cdc2bab MD |
900 | error: |
901 | if (bt_private_notification_iterator_set_user_data(it, NULL) | |
902 | != BT_NOTIFICATION_ITERATOR_STATUS_OK) { | |
087bc060 | 903 | BT_LOGE("Error setting private data to NULL"); |
7cdc2bab MD |
904 | } |
905 | goto end; | |
906 | } | |
907 | ||
908 | static | |
909 | struct bt_value *lttng_live_query_list_sessions(struct bt_component_class *comp_class, | |
910 | struct bt_value *params) | |
911 | { | |
912 | struct bt_value *url_value = NULL; | |
913 | struct bt_value *results = NULL; | |
914 | const char *url; | |
915 | struct bt_live_viewer_connection *viewer_connection = NULL; | |
7cdc2bab MD |
916 | |
917 | url_value = bt_value_map_get(params, "url"); | |
918 | if (!url_value || bt_value_is_null(url_value) || !bt_value_is_string(url_value)) { | |
087bc060 | 919 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
920 | goto error; |
921 | } | |
922 | ||
3cdf4234 | 923 | if (bt_value_string_get(url_value, &url) != BT_VALUE_STATUS_OK) { |
087bc060 | 924 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
925 | goto error; |
926 | } | |
927 | ||
4c66436f | 928 | viewer_connection = bt_live_viewer_connection_create(url, NULL); |
7cdc2bab | 929 | if (!viewer_connection) { |
7cdc2bab MD |
930 | goto error; |
931 | } | |
932 | ||
933 | results = bt_live_viewer_connection_list_sessions(viewer_connection); | |
934 | goto end; | |
935 | error: | |
936 | BT_PUT(results); | |
937 | end: | |
938 | if (viewer_connection) { | |
939 | bt_live_viewer_connection_destroy(viewer_connection); | |
940 | } | |
941 | BT_PUT(url_value); | |
942 | return results; | |
943 | } | |
944 | ||
945 | BT_HIDDEN | |
946 | struct bt_value *lttng_live_query(struct bt_component_class *comp_class, | |
947 | const char *object, struct bt_value *params) | |
948 | { | |
949 | if (strcmp(object, "sessions") == 0) { | |
950 | return lttng_live_query_list_sessions(comp_class, | |
951 | params); | |
952 | } | |
087bc060 | 953 | BT_LOGW("Unknown query object `%s`", object); |
7cdc2bab MD |
954 | return NULL; |
955 | } | |
956 | ||
957 | static | |
958 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
959 | { | |
960 | int ret; | |
961 | struct lttng_live_session *session, *s; | |
962 | ||
963 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
964 | lttng_live_destroy_session(session); | |
965 | } | |
966 | BT_PUT(lttng_live->viewer_connection); | |
967 | if (lttng_live->url) { | |
968 | g_string_free(lttng_live->url, TRUE); | |
969 | } | |
970 | if (lttng_live->no_stream_port) { | |
971 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
972 | assert(!ret); | |
973 | BT_PUT(lttng_live->no_stream_port); | |
974 | } | |
975 | if (lttng_live->no_stream_iter) { | |
976 | g_free(lttng_live->no_stream_iter); | |
977 | } | |
978 | g_free(lttng_live); | |
979 | } | |
980 | ||
981 | BT_HIDDEN | |
982 | void lttng_live_component_finalize(struct bt_private_component *component) | |
983 | { | |
984 | void *data = bt_private_component_get_user_data(component); | |
985 | ||
986 | if (!data) { | |
987 | return; | |
988 | } | |
989 | lttng_live_component_destroy_data(data); | |
990 | } | |
991 | ||
992 | static | |
993 | struct lttng_live_component *lttng_live_component_create(struct bt_value *params, | |
3cdf4234 MD |
994 | struct bt_private_component *private_component, |
995 | struct bt_graph *graph) | |
7cdc2bab MD |
996 | { |
997 | struct lttng_live_component *lttng_live; | |
998 | struct bt_value *value = NULL; | |
999 | const char *url; | |
1000 | enum bt_value_status ret; | |
1001 | ||
1002 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1003 | if (!lttng_live) { | |
1004 | goto end; | |
1005 | } | |
7cdc2bab MD |
1006 | /* TODO: make this an overridable parameter. */ |
1007 | lttng_live->max_query_size = MAX_QUERY_SIZE; | |
1008 | BT_INIT_LIST_HEAD(<tng_live->sessions); | |
1009 | value = bt_value_map_get(params, "url"); | |
1010 | if (!value || bt_value_is_null(value) || !bt_value_is_string(value)) { | |
087bc060 | 1011 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
1012 | goto error; |
1013 | } | |
1014 | ret = bt_value_string_get(value, &url); | |
1015 | if (ret != BT_VALUE_STATUS_OK) { | |
087bc060 | 1016 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
1017 | goto error; |
1018 | } | |
1019 | lttng_live->url = g_string_new(url); | |
1020 | if (!lttng_live->url) { | |
1021 | goto error; | |
1022 | } | |
1023 | lttng_live->viewer_connection = | |
4c66436f | 1024 | bt_live_viewer_connection_create(lttng_live->url->str, lttng_live); |
7cdc2bab | 1025 | if (!lttng_live->viewer_connection) { |
7cdc2bab MD |
1026 | goto error; |
1027 | } | |
1028 | if (lttng_live_create_viewer_session(lttng_live)) { | |
7cdc2bab MD |
1029 | goto error; |
1030 | } | |
1031 | lttng_live->private_component = private_component; | |
3cdf4234 | 1032 | lttng_live->graph = graph; |
4c66436f | 1033 | |
7cdc2bab MD |
1034 | goto end; |
1035 | ||
1036 | error: | |
1037 | lttng_live_component_destroy_data(lttng_live); | |
1038 | lttng_live = NULL; | |
1039 | end: | |
1040 | return lttng_live; | |
d3e4dcd8 PP |
1041 | } |
1042 | ||
f3bc2010 | 1043 | BT_HIDDEN |
3cdf4234 MD |
1044 | enum bt_component_status lttng_live_component_init( |
1045 | struct bt_private_component *private_component, | |
7cdc2bab | 1046 | struct bt_value *params, void *init_method_data) |
f3bc2010 | 1047 | { |
7cdc2bab MD |
1048 | struct lttng_live_component *lttng_live; |
1049 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; | |
3cdf4234 MD |
1050 | struct bt_component *component; |
1051 | struct bt_graph *graph; | |
1052 | ||
1053 | component = bt_component_from_private_component(private_component); | |
1054 | graph = bt_component_get_graph(component); | |
1055 | bt_put(graph); /* weak */ | |
1056 | bt_put(component); | |
7cdc2bab | 1057 | |
7cdc2bab | 1058 | /* Passes ownership of iter ref to lttng_live_component_create. */ |
3cdf4234 MD |
1059 | lttng_live = lttng_live_component_create(params, private_component, |
1060 | graph); | |
7cdc2bab | 1061 | if (!lttng_live) { |
3cdf4234 MD |
1062 | if (bt_graph_is_canceled(graph)) { |
1063 | ret = BT_COMPONENT_STATUS_AGAIN; | |
1064 | } else { | |
1065 | ret = BT_COMPONENT_STATUS_NOMEM; | |
1066 | } | |
7cdc2bab MD |
1067 | goto end; |
1068 | } | |
1069 | ||
1070 | lttng_live->no_stream_iter = g_new0(struct lttng_live_no_stream_iterator, 1); | |
1071 | lttng_live->no_stream_iter->p.type = LIVE_STREAM_TYPE_NO_STREAM; | |
1072 | lttng_live->no_stream_iter->lttng_live = lttng_live; | |
147337a3 | 1073 | ret = bt_private_component_source_add_output_private_port( |
7cdc2bab | 1074 | lttng_live->private_component, "no-stream", |
147337a3 PP |
1075 | lttng_live->no_stream_iter, |
1076 | <tng_live->no_stream_port); | |
1077 | if (ret != BT_COMPONENT_STATUS_OK) { | |
1078 | goto end; | |
1079 | } | |
1080 | ||
7cdc2bab MD |
1081 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; |
1082 | ||
3cdf4234 | 1083 | ret = bt_private_component_set_user_data(private_component, lttng_live); |
7cdc2bab MD |
1084 | if (ret != BT_COMPONENT_STATUS_OK) { |
1085 | goto error; | |
1086 | } | |
1087 | ||
1088 | end: | |
1089 | return ret; | |
1090 | error: | |
3cdf4234 | 1091 | (void) bt_private_component_set_user_data(private_component, NULL); |
7cdc2bab MD |
1092 | lttng_live_component_destroy_data(lttng_live); |
1093 | return ret; | |
f3bc2010 | 1094 | } |
087bc060 | 1095 | |
d85ef162 MD |
1096 | BT_HIDDEN |
1097 | enum bt_component_status lttng_live_accept_port_connection( | |
1098 | struct bt_private_component *private_component, | |
1099 | struct bt_private_port *self_private_port, | |
1100 | struct bt_port *other_port) | |
1101 | { | |
1102 | struct lttng_live_component *lttng_live = | |
1103 | bt_private_component_get_user_data(private_component); | |
1104 | struct bt_component *other_component; | |
1105 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; | |
1106 | struct bt_port *self_port = bt_port_from_private_port(self_private_port); | |
1107 | ||
1108 | other_component = bt_port_get_component(other_port); | |
1109 | bt_put(other_component); /* weak */ | |
1110 | ||
1111 | if (!lttng_live->downstream_component) { | |
1112 | lttng_live->downstream_component = other_component; | |
1113 | goto end; | |
1114 | } | |
1115 | ||
1116 | /* | |
1117 | * Compare prior component to ensure we are connected to the | |
1118 | * same downstream component as prior ports. | |
1119 | */ | |
1120 | if (lttng_live->downstream_component != other_component) { | |
1121 | BT_LOGW("Cannot connect ctf.lttng-live component port \"%s\" to component \"%s\": already connected to component \"%s\".", | |
1122 | bt_port_get_name(self_port), | |
1123 | bt_component_get_name(other_component), | |
1124 | bt_component_get_name(lttng_live->downstream_component)); | |
1125 | status = BT_COMPONENT_STATUS_REFUSE_PORT_CONNECTION; | |
1126 | goto end; | |
1127 | } | |
1128 | end: | |
1129 | bt_put(self_port); | |
1130 | return status; | |
1131 | } |