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