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 | ||
7cdc2bab | 30 | #include <babeltrace/ctf-ir/packet.h> |
b2e0c907 | 31 | #include <babeltrace/graph/component-source.h> |
7cdc2bab MD |
32 | #include <babeltrace/graph/private-port.h> |
33 | #include <babeltrace/graph/port.h> | |
34 | #include <babeltrace/graph/private-component.h> | |
35 | #include <babeltrace/graph/private-component-source.h> | |
36 | #include <babeltrace/graph/private-notification-iterator.h> | |
37 | #include <babeltrace/graph/notification-stream.h> | |
38 | #include <babeltrace/graph/notification-packet.h> | |
39 | #include <babeltrace/graph/notification-event.h> | |
40 | #include <babeltrace/graph/notification-heap.h> | |
41 | #include <babeltrace/graph/notification-iterator.h> | |
42 | #include <babeltrace/graph/notification-inactivity.h> | |
4c66436f | 43 | #include <babeltrace/graph/graph.h> |
7cdc2bab MD |
44 | #include <babeltrace/compiler-internal.h> |
45 | #include <inttypes.h> | |
46 | #include <glib.h> | |
47 | #include <assert.h> | |
48 | #include <unistd.h> | |
7d61fa8e | 49 | #include <plugins-common.h> |
f3bc2010 | 50 | |
087bc060 | 51 | #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE" |
047358f9 | 52 | #define BT_LOGLEVEL_NAME "BABELTRACE_PLUGIN_CTF_LTTNG_LIVE_LOG_LEVEL" |
087bc060 | 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 | ||
d3e4dcd8 | 86 | BT_HIDDEN |
087bc060 | 87 | int bt_lttng_live_log_level = BT_LOG_NONE; |
7cdc2bab MD |
88 | |
89 | BT_HIDDEN | |
90 | int lttng_live_add_port(struct lttng_live_component *lttng_live, | |
91 | struct lttng_live_stream_iterator *stream_iter) | |
92 | { | |
93 | int ret; | |
94 | struct bt_private_port *private_port; | |
95 | char name[STREAM_NAME_MAX_LEN]; | |
96 | ||
97 | ret = sprintf(name, STREAM_NAME_PREFIX "%" PRIu64, stream_iter->viewer_stream_id); | |
98 | assert(ret > 0); | |
99 | strcpy(stream_iter->name, name); | |
100 | private_port = bt_private_component_source_add_output_private_port( | |
101 | lttng_live->private_component, name, stream_iter); | |
102 | if (!private_port) { | |
103 | return -1; | |
104 | } | |
087bc060 | 105 | BT_LOGI("Added port %s", name); |
7cdc2bab MD |
106 | |
107 | if (lttng_live->no_stream_port) { | |
108 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
109 | if (ret) { | |
110 | return -1; | |
111 | } | |
112 | BT_PUT(lttng_live->no_stream_port); | |
113 | lttng_live->no_stream_iter->port = NULL; | |
114 | } | |
115 | stream_iter->port = private_port; | |
116 | return 0; | |
117 | } | |
118 | ||
119 | BT_HIDDEN | |
120 | int lttng_live_remove_port(struct lttng_live_component *lttng_live, | |
121 | struct bt_private_port *port) | |
122 | { | |
123 | struct bt_component *component; | |
124 | int64_t nr_ports; | |
125 | int ret; | |
126 | ||
127 | component = bt_component_from_private_component(lttng_live->private_component); | |
128 | nr_ports = bt_component_source_get_output_port_count(component); | |
129 | if (nr_ports < 0) { | |
130 | return -1; | |
131 | } | |
132 | BT_PUT(component); | |
133 | if (nr_ports == 1) { | |
134 | assert(!lttng_live->no_stream_port); | |
135 | lttng_live->no_stream_port = | |
136 | bt_private_component_source_add_output_private_port(lttng_live->private_component, | |
137 | "no-stream", lttng_live->no_stream_iter); | |
138 | if (!lttng_live->no_stream_port) { | |
139 | return -1; | |
140 | } | |
141 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; | |
142 | } | |
143 | ret = bt_private_port_remove_from_component(port); | |
144 | if (ret) { | |
145 | return -1; | |
146 | } | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static | |
151 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
152 | uint64_t trace_id) | |
d3e4dcd8 | 153 | { |
7cdc2bab MD |
154 | struct lttng_live_trace *trace; |
155 | ||
156 | bt_list_for_each_entry(trace, &session->traces, node) { | |
157 | if (trace->id == trace_id) { | |
158 | return trace; | |
159 | } | |
160 | } | |
d3eb6e8f PP |
161 | return NULL; |
162 | } | |
163 | ||
7cdc2bab MD |
164 | static |
165 | void lttng_live_destroy_trace(struct bt_object *obj) | |
166 | { | |
167 | struct lttng_live_trace *trace = container_of(obj, struct lttng_live_trace, obj); | |
5bd230f4 | 168 | int retval; |
7cdc2bab | 169 | |
087bc060 | 170 | BT_LOGI("Destroy trace"); |
7cdc2bab MD |
171 | assert(bt_list_empty(&trace->streams)); |
172 | bt_list_del(&trace->node); | |
5bd230f4 MD |
173 | |
174 | retval = bt_ctf_trace_set_is_static(trace->trace); | |
175 | assert(!retval); | |
176 | ||
7cdc2bab MD |
177 | lttng_live_metadata_fini(trace); |
178 | BT_PUT(trace->cc_prio_map); | |
179 | g_free(trace); | |
180 | } | |
181 | ||
182 | static | |
183 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
184 | uint64_t trace_id) | |
185 | { | |
186 | struct lttng_live_trace *trace = NULL; | |
187 | ||
188 | trace = g_new0(struct lttng_live_trace, 1); | |
189 | if (!trace) { | |
190 | goto error; | |
191 | } | |
192 | trace->session = session; | |
193 | trace->id = trace_id; | |
194 | BT_INIT_LIST_HEAD(&trace->streams); | |
195 | trace->new_metadata_needed = true; | |
196 | bt_list_add(&trace->node, &session->traces); | |
197 | bt_object_init(&trace->obj, lttng_live_destroy_trace); | |
087bc060 | 198 | BT_LOGI("Create trace"); |
7cdc2bab MD |
199 | goto end; |
200 | error: | |
201 | g_free(trace); | |
202 | trace = NULL; | |
203 | end: | |
204 | return trace; | |
205 | } | |
206 | ||
207 | BT_HIDDEN | |
208 | struct lttng_live_trace *lttng_live_ref_trace(struct lttng_live_session *session, | |
209 | uint64_t trace_id) | |
210 | { | |
211 | struct lttng_live_trace *trace; | |
212 | ||
213 | trace = lttng_live_find_trace(session, trace_id); | |
214 | if (trace) { | |
215 | bt_get(trace); | |
216 | return trace; | |
217 | } | |
218 | return lttng_live_create_trace(session, trace_id); | |
219 | } | |
220 | ||
221 | BT_HIDDEN | |
222 | void lttng_live_unref_trace(struct lttng_live_trace *trace) | |
223 | { | |
224 | bt_put(trace); | |
225 | } | |
226 | ||
227 | static | |
228 | void lttng_live_close_trace_streams(struct lttng_live_trace *trace) | |
229 | { | |
230 | struct lttng_live_stream_iterator *stream, *s; | |
231 | ||
232 | bt_list_for_each_entry_safe(stream, s, &trace->streams, node) { | |
233 | lttng_live_stream_iterator_destroy(stream); | |
234 | } | |
235 | lttng_live_metadata_fini(trace); | |
236 | } | |
237 | ||
238 | BT_HIDDEN | |
239 | int lttng_live_add_session(struct lttng_live_component *lttng_live, uint64_t session_id) | |
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; | |
253 | ||
087bc060 | 254 | BT_LOGI("Reading from session %" PRIu64, s->id); |
7cdc2bab MD |
255 | bt_list_add(&s->node, <tng_live->sessions); |
256 | goto end; | |
257 | error: | |
087bc060 | 258 | BT_LOGE("Error adding session"); |
7cdc2bab MD |
259 | g_free(s); |
260 | ret = -1; | |
261 | end: | |
262 | return ret; | |
263 | } | |
264 | ||
265 | static | |
266 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
267 | { | |
268 | struct lttng_live_trace *trace, *t; | |
269 | ||
087bc060 | 270 | BT_LOGI("Destroy session"); |
7cdc2bab MD |
271 | if (session->id != -1ULL) { |
272 | if (lttng_live_detach_session(session)) { | |
4c66436f MD |
273 | if (!bt_graph_is_canceled(session->lttng_live->graph)) { |
274 | /* Old relayd cannot detach sessions. */ | |
275 | BT_LOGD("Unable to detach session %" PRIu64, | |
276 | session->id); | |
277 | } | |
7cdc2bab MD |
278 | } |
279 | session->id = -1ULL; | |
280 | } | |
281 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
282 | lttng_live_close_trace_streams(trace); | |
283 | } | |
284 | bt_list_del(&session->node); | |
285 | g_free(session); | |
286 | } | |
287 | ||
288 | BT_HIDDEN | |
289 | void lttng_live_iterator_finalize(struct bt_private_notification_iterator *it) | |
290 | { | |
291 | struct lttng_live_stream_iterator_generic *s = | |
292 | bt_private_notification_iterator_get_user_data(it); | |
293 | ||
294 | switch (s->type) { | |
295 | case LIVE_STREAM_TYPE_NO_STREAM: | |
296 | { | |
297 | /* Leave no_stream_iter in place when port is removed. */ | |
298 | break; | |
299 | } | |
300 | case LIVE_STREAM_TYPE_STREAM: | |
301 | { | |
302 | struct lttng_live_stream_iterator *stream_iter = | |
303 | container_of(s, struct lttng_live_stream_iterator, p); | |
304 | ||
305 | lttng_live_stream_iterator_destroy(stream_iter); | |
306 | break; | |
307 | } | |
308 | } | |
309 | } | |
310 | ||
311 | static | |
312 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( | |
313 | struct lttng_live_component *lttng_live, | |
314 | struct lttng_live_stream_iterator *lttng_live_stream) | |
315 | { | |
316 | switch (lttng_live_stream->state) { | |
317 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
318 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
319 | break; | |
320 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
321 | /* Invalid state. */ | |
087bc060 MD |
322 | BT_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
323 | abort(); | |
7cdc2bab MD |
324 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
325 | /* Invalid state. */ | |
087bc060 MD |
326 | BT_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
327 | abort(); | |
7cdc2bab MD |
328 | case LTTNG_LIVE_STREAM_EOF: |
329 | break; | |
330 | } | |
331 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
332 | } | |
333 | ||
334 | /* | |
335 | * For active no data stream, fetch next data. It can be either: | |
336 | * - quiescent: need to put it in the prio heap at quiescent end | |
337 | * timestamp, | |
338 | * - have data: need to wire up first event into the prio heap, | |
339 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
340 | * return EOF. | |
341 | */ | |
342 | static | |
343 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( | |
344 | struct lttng_live_component *lttng_live, | |
345 | struct lttng_live_stream_iterator *lttng_live_stream) | |
346 | { | |
347 | enum bt_ctf_lttng_live_iterator_status ret = | |
348 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
349 | struct packet_index index; | |
350 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; | |
351 | ||
352 | if (lttng_live_stream->trace->new_metadata_needed) { | |
353 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
354 | goto end; | |
355 | } | |
356 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
357 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
358 | goto end; | |
359 | } | |
360 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA | |
361 | && lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
362 | goto end; | |
363 | } | |
364 | ret = lttng_live_get_next_index(lttng_live, lttng_live_stream, &index); | |
365 | if (ret != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
366 | goto end; | |
367 | } | |
368 | assert(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); | |
369 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { | |
370 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA | |
371 | && lttng_live_stream->last_returned_inactivity_timestamp == | |
372 | lttng_live_stream->current_inactivity_timestamp) { | |
373 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
374 | print_stream_state(lttng_live_stream); | |
375 | } else { | |
376 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
377 | } | |
378 | goto end; | |
379 | } | |
380 | lttng_live_stream->base_offset = index.offset; | |
381 | lttng_live_stream->offset = index.offset; | |
382 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
383 | end: | |
384 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
385 | ret = lttng_live_iterator_next_check_stream_state( | |
386 | lttng_live, lttng_live_stream); | |
387 | } | |
388 | return ret; | |
389 | } | |
390 | ||
391 | /* | |
392 | * Creation of the notification requires the ctf trace to be created | |
393 | * beforehand, but the live protocol gives us all streams (including | |
394 | * metadata) at once. So we split it in three steps: getting streams, | |
395 | * getting metadata (which creates the ctf trace), and then creating the | |
396 | * per-stream notifications. | |
397 | */ | |
398 | static | |
399 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_session( | |
400 | struct lttng_live_component *lttng_live, | |
401 | struct lttng_live_session *session) | |
402 | { | |
403 | enum bt_ctf_lttng_live_iterator_status status; | |
404 | struct lttng_live_trace *trace, *t; | |
405 | ||
406 | if (lttng_live_attach_session(session)) { | |
4c66436f MD |
407 | if (bt_graph_is_canceled(lttng_live->graph)) { |
408 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
409 | } else { | |
410 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
411 | } | |
7cdc2bab MD |
412 | } |
413 | status = lttng_live_get_new_streams(session); | |
414 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && | |
415 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
416 | return status; | |
417 | } | |
418 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
419 | status = lttng_live_metadata_update(trace); | |
5bd230f4 MD |
420 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && |
421 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
422 | return status; |
423 | } | |
424 | } | |
425 | return lttng_live_lazy_notif_init(session); | |
426 | } | |
427 | ||
428 | BT_HIDDEN | |
429 | void lttng_live_need_new_streams(struct lttng_live_component *lttng_live) | |
430 | { | |
431 | struct lttng_live_session *session; | |
432 | ||
433 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
434 | session->new_streams_needed = true; | |
435 | } | |
436 | } | |
437 | ||
438 | static | |
439 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_component *lttng_live) | |
440 | { | |
441 | struct lttng_live_session *session; | |
442 | ||
443 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
444 | struct lttng_live_trace *trace; | |
445 | ||
446 | session->new_streams_needed = true; | |
447 | bt_list_for_each_entry(trace, &session->traces, node) { | |
448 | trace->new_metadata_needed = true; | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
453 | static | |
3cdf4234 | 454 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_new_streams_and_metadata( |
7cdc2bab MD |
455 | struct lttng_live_component *lttng_live) |
456 | { | |
457 | enum bt_ctf_lttng_live_iterator_status ret = | |
458 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
459 | unsigned int nr_sessions_opened = 0; | |
460 | struct lttng_live_session *session, *s; | |
461 | ||
462 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
463 | if (session->closed && bt_list_empty(&session->traces)) { | |
464 | lttng_live_destroy_session(session); | |
465 | } | |
466 | } | |
467 | /* | |
468 | * Currently, when there are no sessions, we quit immediately. | |
469 | * We may want to add a component parameter to keep trying until | |
470 | * we get data in the future. | |
471 | * Also, in a remotely distant future, we could add a "new | |
472 | * session" flag to the protocol, which would tell us that we | |
473 | * need to query for new sessions even though we have sessions | |
474 | * currently ongoing. | |
475 | */ | |
476 | if (bt_list_empty(<tng_live->sessions)) { | |
477 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
478 | goto end; | |
479 | } | |
480 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
481 | ret = lttng_live_get_session(lttng_live, session); | |
482 | switch (ret) { | |
483 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
484 | break; | |
485 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
486 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
487 | break; | |
488 | default: | |
489 | goto end; | |
490 | } | |
491 | if (!session->closed) { | |
492 | nr_sessions_opened++; | |
493 | } | |
494 | } | |
495 | end: | |
496 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && !nr_sessions_opened) { | |
497 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
498 | } | |
499 | return ret; | |
500 | } | |
501 | ||
502 | static | |
503 | enum bt_ctf_lttng_live_iterator_status emit_inactivity_notification( | |
504 | struct lttng_live_component *lttng_live, | |
505 | struct lttng_live_stream_iterator *lttng_live_stream, | |
506 | struct bt_notification **notification, | |
507 | uint64_t timestamp) | |
508 | { | |
509 | enum bt_ctf_lttng_live_iterator_status ret = | |
510 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
511 | struct lttng_live_trace *trace; | |
512 | struct bt_ctf_clock_class *clock_class = NULL; | |
513 | struct bt_ctf_clock_value *clock_value = NULL; | |
514 | struct bt_notification *notif = NULL; | |
515 | int retval; | |
516 | ||
517 | trace = lttng_live_stream->trace; | |
518 | if (!trace) { | |
519 | goto error; | |
520 | } | |
521 | clock_class = bt_clock_class_priority_map_get_clock_class_by_index(trace->cc_prio_map, 0); | |
522 | if (!clock_class) { | |
523 | goto error; | |
524 | } | |
525 | clock_value = bt_ctf_clock_value_create(clock_class, timestamp); | |
526 | if (!clock_value) { | |
527 | goto error; | |
528 | } | |
529 | notif = bt_notification_inactivity_create(trace->cc_prio_map); | |
530 | if (!notif) { | |
531 | goto error; | |
532 | } | |
533 | retval = bt_notification_inactivity_set_clock_value(notif, clock_value); | |
534 | if (retval) { | |
535 | goto error; | |
536 | } | |
537 | *notification = notif; | |
538 | end: | |
539 | bt_put(clock_value); | |
540 | bt_put(clock_class); | |
541 | return ret; | |
542 | ||
543 | error: | |
544 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
545 | bt_put(notif); | |
546 | goto end; | |
547 | } | |
548 | ||
549 | static | |
550 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( | |
551 | struct lttng_live_component *lttng_live, | |
552 | struct lttng_live_stream_iterator *lttng_live_stream, | |
553 | struct bt_notification **notification) | |
554 | { | |
555 | enum bt_ctf_lttng_live_iterator_status ret = | |
556 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
557 | struct bt_ctf_clock_class *clock_class = NULL; | |
558 | struct bt_ctf_clock_value *clock_value = NULL; | |
559 | ||
560 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
561 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
562 | } | |
563 | ||
564 | if (lttng_live_stream->current_inactivity_timestamp == | |
565 | lttng_live_stream->last_returned_inactivity_timestamp) { | |
566 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; | |
567 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
568 | goto end; | |
569 | } | |
570 | ||
571 | ret = emit_inactivity_notification(lttng_live, lttng_live_stream, notification, | |
572 | (uint64_t) lttng_live_stream->current_inactivity_timestamp); | |
573 | ||
574 | lttng_live_stream->last_returned_inactivity_timestamp = | |
575 | lttng_live_stream->current_inactivity_timestamp; | |
576 | end: | |
577 | bt_put(clock_value); | |
578 | bt_put(clock_class); | |
579 | return ret; | |
580 | } | |
581 | ||
582 | static | |
583 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( | |
584 | struct lttng_live_component *lttng_live, | |
585 | struct lttng_live_stream_iterator *lttng_live_stream, | |
586 | struct bt_notification **notification) | |
587 | { | |
588 | enum bt_ctf_lttng_live_iterator_status ret = | |
589 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
590 | enum bt_ctf_notif_iter_status status; | |
591 | struct lttng_live_session *session; | |
592 | ||
593 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
594 | struct lttng_live_trace *trace; | |
595 | ||
596 | if (session->new_streams_needed) { | |
597 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
598 | } | |
599 | bt_list_for_each_entry(trace, &session->traces, node) { | |
600 | if (trace->new_metadata_needed) { | |
601 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
602 | } | |
603 | } | |
604 | } | |
605 | ||
606 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
607 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
608 | } | |
609 | if (lttng_live_stream->packet_end_notif_queue) { | |
610 | *notification = lttng_live_stream->packet_end_notif_queue; | |
611 | lttng_live_stream->packet_end_notif_queue = NULL; | |
612 | status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
613 | } else { | |
614 | status = bt_ctf_notif_iter_get_next_notification( | |
615 | lttng_live_stream->notif_iter, | |
616 | lttng_live_stream->trace->cc_prio_map, | |
617 | notification); | |
618 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { | |
619 | /* | |
620 | * Consider empty packets as inactivity. | |
621 | */ | |
622 | if (bt_notification_get_type(*notification) == BT_NOTIFICATION_TYPE_PACKET_END) { | |
623 | lttng_live_stream->packet_end_notif_queue = *notification; | |
624 | *notification = NULL; | |
625 | return emit_inactivity_notification(lttng_live, | |
626 | lttng_live_stream, notification, | |
627 | lttng_live_stream->current_packet_end_timestamp); | |
628 | } | |
629 | } | |
630 | } | |
631 | switch (status) { | |
632 | case BT_CTF_NOTIF_ITER_STATUS_EOF: | |
633 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
634 | break; | |
635 | case BT_CTF_NOTIF_ITER_STATUS_OK: | |
636 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
637 | break; | |
638 | case BT_CTF_NOTIF_ITER_STATUS_AGAIN: | |
639 | /* | |
640 | * Continue immediately (end of packet). The next | |
641 | * get_index may return AGAIN to delay the following | |
642 | * attempt. | |
643 | */ | |
644 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
645 | break; | |
646 | case BT_CTF_NOTIF_ITER_STATUS_INVAL: | |
647 | /* No argument provided by the user, so don't return INVAL. */ | |
648 | case BT_CTF_NOTIF_ITER_STATUS_ERROR: | |
649 | default: | |
650 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
651 | break; | |
652 | } | |
653 | return ret; | |
654 | } | |
655 | ||
656 | /* | |
657 | * helper function: | |
658 | * handle_no_data_streams() | |
659 | * retry: | |
660 | * - for each ACTIVE_NO_DATA stream: | |
661 | * - query relayd for stream data, or quiescence info. | |
662 | * - if need metadata, get metadata, goto retry. | |
663 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
664 | * - if quiescent, move to QUIESCENT streams | |
665 | * - if fetched data, move to ACTIVE_DATA streams | |
666 | * (at this point each stream either has data, or is quiescent) | |
667 | * | |
668 | * | |
669 | * iterator_next: | |
670 | * handle_new_streams_and_metadata() | |
671 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
672 | * - query relayd for metadata | |
673 | * | |
674 | * call handle_active_no_data_streams() | |
675 | * | |
676 | * handle_quiescent_streams() | |
677 | * - if at least one stream is ACTIVE_DATA: | |
678 | * - peek stream event with lowest timestamp -> next_ts | |
679 | * - for each quiescent stream | |
680 | * - if next_ts >= quiescent end | |
681 | * - set state to ACTIVE_NO_DATA | |
682 | * - else | |
683 | * - for each quiescent stream | |
684 | * - set state to ACTIVE_NO_DATA | |
685 | * | |
686 | * call handle_active_no_data_streams() | |
687 | * | |
688 | * handle_active_data_streams() | |
689 | * - if at least one stream is ACTIVE_DATA: | |
690 | * - get stream event with lowest timestamp from heap | |
691 | * - make that stream event the current notification. | |
692 | * - move this stream heap position to its next event | |
693 | * - if we need to fetch data from relayd, move | |
694 | * stream to ACTIVE_NO_DATA. | |
695 | * - return OK | |
696 | * - return AGAIN | |
697 | * | |
698 | * end criterion: ctrl-c on client. If relayd exits or the session | |
699 | * closes on the relay daemon side, we keep on waiting for streams. | |
700 | * Eventually handle --end timestamp (also an end criterion). | |
701 | * | |
702 | * When disconnected from relayd: try to re-connect endlessly. | |
703 | */ | |
704 | static | |
705 | struct bt_notification_iterator_next_return lttng_live_iterator_next_stream( | |
706 | struct bt_private_notification_iterator *iterator, | |
707 | struct lttng_live_stream_iterator *stream_iter) | |
708 | { | |
709 | enum bt_ctf_lttng_live_iterator_status status; | |
710 | struct bt_notification_iterator_next_return next_return; | |
711 | struct lttng_live_component *lttng_live; | |
712 | ||
713 | lttng_live = stream_iter->trace->session->lttng_live; | |
714 | retry: | |
715 | print_stream_state(stream_iter); | |
716 | next_return.notification = NULL; | |
717 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
718 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
719 | goto end; | |
720 | } | |
721 | status = lttng_live_iterator_next_handle_one_no_data_stream( | |
722 | lttng_live, stream_iter); | |
723 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
724 | goto end; | |
725 | } | |
726 | status = lttng_live_iterator_next_handle_one_quiescent_stream( | |
727 | lttng_live, stream_iter, &next_return.notification); | |
728 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
729 | assert(next_return.notification == NULL); | |
730 | goto end; | |
731 | } | |
732 | if (next_return.notification) { | |
733 | goto end; | |
734 | } | |
735 | status = lttng_live_iterator_next_handle_one_active_data_stream(lttng_live, | |
736 | stream_iter, &next_return.notification); | |
737 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
738 | assert(next_return.notification == NULL); | |
739 | } | |
740 | ||
741 | end: | |
742 | switch (status) { | |
743 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
744 | print_dbg("continue"); | |
745 | goto retry; | |
746 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
747 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
748 | print_dbg("again"); | |
749 | break; | |
750 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
751 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
752 | print_dbg("end"); | |
753 | break; | |
754 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
755 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
756 | print_dbg("ok"); | |
757 | break; | |
758 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
759 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
760 | break; | |
761 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
762 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
763 | break; | |
764 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
765 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
766 | break; | |
767 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
768 | default: /* fall-through */ | |
769 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
770 | break; | |
771 | } | |
772 | return next_return; | |
773 | } | |
774 | ||
775 | static | |
776 | struct bt_notification_iterator_next_return lttng_live_iterator_next_no_stream( | |
777 | struct bt_private_notification_iterator *iterator, | |
778 | struct lttng_live_no_stream_iterator *no_stream_iter) | |
779 | { | |
780 | enum bt_ctf_lttng_live_iterator_status status; | |
781 | struct bt_notification_iterator_next_return next_return; | |
782 | struct lttng_live_component *lttng_live; | |
783 | ||
784 | lttng_live = no_stream_iter->lttng_live; | |
785 | retry: | |
786 | lttng_live_force_new_streams_and_metadata(lttng_live); | |
787 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
788 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
789 | goto end; | |
790 | } | |
791 | if (no_stream_iter->port) { | |
792 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
793 | } else { | |
794 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
795 | } | |
796 | end: | |
797 | switch (status) { | |
798 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
799 | goto retry; | |
800 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
801 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
802 | break; | |
803 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
804 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
805 | break; | |
806 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
807 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
808 | break; | |
809 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
810 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
811 | break; | |
812 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
813 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
814 | break; | |
815 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
816 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
817 | break; | |
818 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
819 | default: /* fall-through */ | |
820 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
821 | break; | |
822 | } | |
823 | return next_return; | |
824 | } | |
825 | ||
d3eb6e8f | 826 | BT_HIDDEN |
41a2b7ae | 827 | struct bt_notification_iterator_next_return lttng_live_iterator_next( |
890882ef | 828 | struct bt_private_notification_iterator *iterator) |
d3eb6e8f | 829 | { |
7cdc2bab MD |
830 | struct lttng_live_stream_iterator_generic *s = |
831 | bt_private_notification_iterator_get_user_data(iterator); | |
832 | struct bt_notification_iterator_next_return next_return; | |
833 | ||
834 | switch (s->type) { | |
835 | case LIVE_STREAM_TYPE_NO_STREAM: | |
836 | next_return = lttng_live_iterator_next_no_stream(iterator, | |
837 | container_of(s, struct lttng_live_no_stream_iterator, p)); | |
838 | break; | |
839 | case LIVE_STREAM_TYPE_STREAM: | |
840 | next_return = lttng_live_iterator_next_stream(iterator, | |
841 | container_of(s, struct lttng_live_stream_iterator, p)); | |
842 | break; | |
843 | default: | |
844 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
845 | break; | |
846 | } | |
847 | return next_return; | |
848 | } | |
41a2b7ae | 849 | |
7cdc2bab MD |
850 | BT_HIDDEN |
851 | enum bt_notification_iterator_status lttng_live_iterator_init( | |
852 | struct bt_private_notification_iterator *it, | |
853 | struct bt_private_port *port) | |
854 | { | |
855 | enum bt_notification_iterator_status ret = | |
856 | BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
857 | struct lttng_live_stream_iterator_generic *s; | |
7cdc2bab MD |
858 | |
859 | assert(it); | |
860 | ||
861 | s = bt_private_port_get_user_data(port); | |
862 | assert(s); | |
863 | switch (s->type) { | |
864 | case LIVE_STREAM_TYPE_NO_STREAM: | |
865 | { | |
866 | struct lttng_live_no_stream_iterator *no_stream_iter = | |
867 | container_of(s, struct lttng_live_no_stream_iterator, p); | |
7cdc2bab MD |
868 | ret = bt_private_notification_iterator_set_user_data(it, no_stream_iter); |
869 | if (ret) { | |
870 | goto error; | |
871 | } | |
872 | break; | |
873 | } | |
874 | case LIVE_STREAM_TYPE_STREAM: | |
875 | { | |
876 | struct lttng_live_stream_iterator *stream_iter = | |
877 | container_of(s, struct lttng_live_stream_iterator, p); | |
7cdc2bab MD |
878 | ret = bt_private_notification_iterator_set_user_data(it, stream_iter); |
879 | if (ret) { | |
880 | goto error; | |
881 | } | |
882 | break; | |
883 | } | |
884 | default: | |
885 | ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
886 | goto end; | |
887 | } | |
888 | ||
889 | end: | |
41a2b7ae | 890 | return ret; |
7cdc2bab MD |
891 | error: |
892 | if (bt_private_notification_iterator_set_user_data(it, NULL) | |
893 | != BT_NOTIFICATION_ITERATOR_STATUS_OK) { | |
087bc060 | 894 | BT_LOGE("Error setting private data to NULL"); |
7cdc2bab MD |
895 | } |
896 | goto end; | |
897 | } | |
898 | ||
899 | static | |
900 | struct bt_value *lttng_live_query_list_sessions(struct bt_component_class *comp_class, | |
901 | struct bt_value *params) | |
902 | { | |
903 | struct bt_value *url_value = NULL; | |
904 | struct bt_value *results = NULL; | |
905 | const char *url; | |
906 | struct bt_live_viewer_connection *viewer_connection = NULL; | |
7cdc2bab MD |
907 | |
908 | url_value = bt_value_map_get(params, "url"); | |
909 | if (!url_value || bt_value_is_null(url_value) || !bt_value_is_string(url_value)) { | |
087bc060 | 910 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
911 | goto error; |
912 | } | |
913 | ||
3cdf4234 | 914 | if (bt_value_string_get(url_value, &url) != BT_VALUE_STATUS_OK) { |
087bc060 | 915 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
916 | goto error; |
917 | } | |
918 | ||
4c66436f | 919 | viewer_connection = bt_live_viewer_connection_create(url, NULL); |
7cdc2bab | 920 | if (!viewer_connection) { |
7cdc2bab MD |
921 | goto error; |
922 | } | |
923 | ||
924 | results = bt_live_viewer_connection_list_sessions(viewer_connection); | |
925 | goto end; | |
926 | error: | |
927 | BT_PUT(results); | |
928 | end: | |
929 | if (viewer_connection) { | |
930 | bt_live_viewer_connection_destroy(viewer_connection); | |
931 | } | |
932 | BT_PUT(url_value); | |
933 | return results; | |
934 | } | |
935 | ||
936 | BT_HIDDEN | |
937 | struct bt_value *lttng_live_query(struct bt_component_class *comp_class, | |
938 | const char *object, struct bt_value *params) | |
939 | { | |
940 | if (strcmp(object, "sessions") == 0) { | |
941 | return lttng_live_query_list_sessions(comp_class, | |
942 | params); | |
943 | } | |
087bc060 | 944 | BT_LOGW("Unknown query object `%s`", object); |
7cdc2bab MD |
945 | return NULL; |
946 | } | |
947 | ||
948 | static | |
949 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
950 | { | |
951 | int ret; | |
952 | struct lttng_live_session *session, *s; | |
953 | ||
954 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
955 | lttng_live_destroy_session(session); | |
956 | } | |
957 | BT_PUT(lttng_live->viewer_connection); | |
958 | if (lttng_live->url) { | |
959 | g_string_free(lttng_live->url, TRUE); | |
960 | } | |
961 | if (lttng_live->no_stream_port) { | |
962 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
963 | assert(!ret); | |
964 | BT_PUT(lttng_live->no_stream_port); | |
965 | } | |
966 | if (lttng_live->no_stream_iter) { | |
967 | g_free(lttng_live->no_stream_iter); | |
968 | } | |
969 | g_free(lttng_live); | |
970 | } | |
971 | ||
972 | BT_HIDDEN | |
973 | void lttng_live_component_finalize(struct bt_private_component *component) | |
974 | { | |
975 | void *data = bt_private_component_get_user_data(component); | |
976 | ||
977 | if (!data) { | |
978 | return; | |
979 | } | |
980 | lttng_live_component_destroy_data(data); | |
981 | } | |
982 | ||
983 | static | |
984 | struct lttng_live_component *lttng_live_component_create(struct bt_value *params, | |
3cdf4234 MD |
985 | struct bt_private_component *private_component, |
986 | struct bt_graph *graph) | |
7cdc2bab MD |
987 | { |
988 | struct lttng_live_component *lttng_live; | |
989 | struct bt_value *value = NULL; | |
990 | const char *url; | |
991 | enum bt_value_status ret; | |
992 | ||
993 | lttng_live = g_new0(struct lttng_live_component, 1); | |
994 | if (!lttng_live) { | |
995 | goto end; | |
996 | } | |
7cdc2bab MD |
997 | /* TODO: make this an overridable parameter. */ |
998 | lttng_live->max_query_size = MAX_QUERY_SIZE; | |
999 | BT_INIT_LIST_HEAD(<tng_live->sessions); | |
1000 | value = bt_value_map_get(params, "url"); | |
1001 | if (!value || bt_value_is_null(value) || !bt_value_is_string(value)) { | |
087bc060 | 1002 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
1003 | goto error; |
1004 | } | |
1005 | ret = bt_value_string_get(value, &url); | |
1006 | if (ret != BT_VALUE_STATUS_OK) { | |
087bc060 | 1007 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
1008 | goto error; |
1009 | } | |
1010 | lttng_live->url = g_string_new(url); | |
1011 | if (!lttng_live->url) { | |
1012 | goto error; | |
1013 | } | |
1014 | lttng_live->viewer_connection = | |
4c66436f | 1015 | bt_live_viewer_connection_create(lttng_live->url->str, lttng_live); |
7cdc2bab | 1016 | if (!lttng_live->viewer_connection) { |
7cdc2bab MD |
1017 | goto error; |
1018 | } | |
1019 | if (lttng_live_create_viewer_session(lttng_live)) { | |
7cdc2bab MD |
1020 | goto error; |
1021 | } | |
1022 | lttng_live->private_component = private_component; | |
3cdf4234 | 1023 | lttng_live->graph = graph; |
4c66436f | 1024 | |
7cdc2bab MD |
1025 | goto end; |
1026 | ||
1027 | error: | |
1028 | lttng_live_component_destroy_data(lttng_live); | |
1029 | lttng_live = NULL; | |
1030 | end: | |
1031 | return lttng_live; | |
d3e4dcd8 PP |
1032 | } |
1033 | ||
f3bc2010 | 1034 | BT_HIDDEN |
3cdf4234 MD |
1035 | enum bt_component_status lttng_live_component_init( |
1036 | struct bt_private_component *private_component, | |
7cdc2bab | 1037 | struct bt_value *params, void *init_method_data) |
f3bc2010 | 1038 | { |
7cdc2bab MD |
1039 | struct lttng_live_component *lttng_live; |
1040 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; | |
3cdf4234 MD |
1041 | struct bt_component *component; |
1042 | struct bt_graph *graph; | |
1043 | ||
1044 | component = bt_component_from_private_component(private_component); | |
1045 | graph = bt_component_get_graph(component); | |
1046 | bt_put(graph); /* weak */ | |
1047 | bt_put(component); | |
7cdc2bab | 1048 | |
7cdc2bab | 1049 | /* Passes ownership of iter ref to lttng_live_component_create. */ |
3cdf4234 MD |
1050 | lttng_live = lttng_live_component_create(params, private_component, |
1051 | graph); | |
7cdc2bab | 1052 | if (!lttng_live) { |
3cdf4234 MD |
1053 | if (bt_graph_is_canceled(graph)) { |
1054 | ret = BT_COMPONENT_STATUS_AGAIN; | |
1055 | } else { | |
1056 | ret = BT_COMPONENT_STATUS_NOMEM; | |
1057 | } | |
7cdc2bab MD |
1058 | goto end; |
1059 | } | |
1060 | ||
1061 | lttng_live->no_stream_iter = g_new0(struct lttng_live_no_stream_iterator, 1); | |
1062 | lttng_live->no_stream_iter->p.type = LIVE_STREAM_TYPE_NO_STREAM; | |
1063 | lttng_live->no_stream_iter->lttng_live = lttng_live; | |
1064 | ||
1065 | lttng_live->no_stream_port = | |
1066 | bt_private_component_source_add_output_private_port( | |
1067 | lttng_live->private_component, "no-stream", | |
1068 | lttng_live->no_stream_iter); | |
1069 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; | |
1070 | ||
3cdf4234 | 1071 | ret = bt_private_component_set_user_data(private_component, lttng_live); |
7cdc2bab MD |
1072 | if (ret != BT_COMPONENT_STATUS_OK) { |
1073 | goto error; | |
1074 | } | |
1075 | ||
1076 | end: | |
1077 | return ret; | |
1078 | error: | |
3cdf4234 | 1079 | (void) bt_private_component_set_user_data(private_component, NULL); |
7cdc2bab MD |
1080 | lttng_live_component_destroy_data(lttng_live); |
1081 | return ret; | |
f3bc2010 | 1082 | } |
087bc060 | 1083 | |
d85ef162 MD |
1084 | BT_HIDDEN |
1085 | enum bt_component_status lttng_live_accept_port_connection( | |
1086 | struct bt_private_component *private_component, | |
1087 | struct bt_private_port *self_private_port, | |
1088 | struct bt_port *other_port) | |
1089 | { | |
1090 | struct lttng_live_component *lttng_live = | |
1091 | bt_private_component_get_user_data(private_component); | |
1092 | struct bt_component *other_component; | |
1093 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; | |
1094 | struct bt_port *self_port = bt_port_from_private_port(self_private_port); | |
1095 | ||
1096 | other_component = bt_port_get_component(other_port); | |
1097 | bt_put(other_component); /* weak */ | |
1098 | ||
1099 | if (!lttng_live->downstream_component) { | |
1100 | lttng_live->downstream_component = other_component; | |
1101 | goto end; | |
1102 | } | |
1103 | ||
1104 | /* | |
1105 | * Compare prior component to ensure we are connected to the | |
1106 | * same downstream component as prior ports. | |
1107 | */ | |
1108 | if (lttng_live->downstream_component != other_component) { | |
1109 | BT_LOGW("Cannot connect ctf.lttng-live component port \"%s\" to component \"%s\": already connected to component \"%s\".", | |
1110 | bt_port_get_name(self_port), | |
1111 | bt_component_get_name(other_component), | |
1112 | bt_component_get_name(lttng_live->downstream_component)); | |
1113 | status = BT_COMPONENT_STATUS_REFUSE_PORT_CONNECTION; | |
1114 | goto end; | |
1115 | } | |
1116 | end: | |
1117 | bt_put(self_port); | |
1118 | return status; | |
1119 | } | |
1120 | ||
087bc060 MD |
1121 | static |
1122 | void __attribute__((constructor)) bt_lttng_live_logging_ctor(void) | |
1123 | { | |
373c938b | 1124 | bt_lttng_live_log_level = bt_log_get_level_from_env(BT_LOGLEVEL_NAME); |
087bc060 | 1125 | } |