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> | |
43 | #include <babeltrace/compiler-internal.h> | |
44 | #include <inttypes.h> | |
45 | #include <glib.h> | |
46 | #include <assert.h> | |
47 | #include <unistd.h> | |
7d61fa8e | 48 | #include <plugins-common.h> |
f3bc2010 | 49 | |
087bc060 | 50 | #define BT_LOG_TAG "PLUGIN-CTF-LTTNG-LIVE" |
047358f9 | 51 | #define BT_LOGLEVEL_NAME "BABELTRACE_PLUGIN_CTF_LTTNG_LIVE_LOG_LEVEL" |
087bc060 | 52 | |
7cdc2bab MD |
53 | #include "data-stream.h" |
54 | #include "metadata.h" | |
0f5e83e5 | 55 | #include "lttng-live-internal.h" |
7cdc2bab | 56 | |
7cdc2bab | 57 | #define MAX_QUERY_SIZE (256*1024) |
7cdc2bab | 58 | |
087bc060 | 59 | #define print_dbg(fmt, ...) BT_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab MD |
60 | |
61 | static const char *print_state(struct lttng_live_stream_iterator *s) | |
62 | { | |
63 | switch (s->state) { | |
64 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
65 | return "ACTIVE_NO_DATA"; | |
66 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
67 | return "QUIESCENT_NO_DATA"; | |
68 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
69 | return "QUIESCENT"; | |
70 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
71 | return "ACTIVE_DATA"; | |
72 | case LTTNG_LIVE_STREAM_EOF: | |
73 | return "EOF"; | |
74 | default: | |
75 | return "ERROR"; | |
76 | } | |
77 | } | |
7cdc2bab MD |
78 | |
79 | #define print_stream_state(stream) \ | |
80 | print_dbg("stream %s state %s last_inact_ts %" PRId64 " cur_inact_ts %" PRId64, \ | |
81 | bt_port_get_name(bt_port_from_private_port(stream->port)), \ | |
82 | print_state(stream), stream->last_returned_inactivity_timestamp, \ | |
83 | stream->current_inactivity_timestamp) | |
84 | ||
d3e4dcd8 | 85 | BT_HIDDEN |
087bc060 | 86 | int bt_lttng_live_log_level = BT_LOG_NONE; |
7cdc2bab MD |
87 | |
88 | BT_HIDDEN | |
89 | int lttng_live_add_port(struct lttng_live_component *lttng_live, | |
90 | struct lttng_live_stream_iterator *stream_iter) | |
91 | { | |
92 | int ret; | |
93 | struct bt_private_port *private_port; | |
94 | char name[STREAM_NAME_MAX_LEN]; | |
95 | ||
96 | ret = sprintf(name, STREAM_NAME_PREFIX "%" PRIu64, stream_iter->viewer_stream_id); | |
97 | assert(ret > 0); | |
98 | strcpy(stream_iter->name, name); | |
99 | private_port = bt_private_component_source_add_output_private_port( | |
100 | lttng_live->private_component, name, stream_iter); | |
101 | if (!private_port) { | |
102 | return -1; | |
103 | } | |
087bc060 | 104 | BT_LOGI("Added port %s", name); |
7cdc2bab MD |
105 | |
106 | if (lttng_live->no_stream_port) { | |
107 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
108 | if (ret) { | |
109 | return -1; | |
110 | } | |
111 | BT_PUT(lttng_live->no_stream_port); | |
112 | lttng_live->no_stream_iter->port = NULL; | |
113 | } | |
114 | stream_iter->port = private_port; | |
115 | return 0; | |
116 | } | |
117 | ||
118 | BT_HIDDEN | |
119 | int lttng_live_remove_port(struct lttng_live_component *lttng_live, | |
120 | struct bt_private_port *port) | |
121 | { | |
122 | struct bt_component *component; | |
123 | int64_t nr_ports; | |
124 | int ret; | |
125 | ||
126 | component = bt_component_from_private_component(lttng_live->private_component); | |
127 | nr_ports = bt_component_source_get_output_port_count(component); | |
128 | if (nr_ports < 0) { | |
129 | return -1; | |
130 | } | |
131 | BT_PUT(component); | |
132 | if (nr_ports == 1) { | |
133 | assert(!lttng_live->no_stream_port); | |
134 | lttng_live->no_stream_port = | |
135 | bt_private_component_source_add_output_private_port(lttng_live->private_component, | |
136 | "no-stream", lttng_live->no_stream_iter); | |
137 | if (!lttng_live->no_stream_port) { | |
138 | return -1; | |
139 | } | |
140 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; | |
141 | } | |
142 | ret = bt_private_port_remove_from_component(port); | |
143 | if (ret) { | |
144 | return -1; | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
149 | static | |
150 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
151 | uint64_t trace_id) | |
d3e4dcd8 | 152 | { |
7cdc2bab MD |
153 | struct lttng_live_trace *trace; |
154 | ||
155 | bt_list_for_each_entry(trace, &session->traces, node) { | |
156 | if (trace->id == trace_id) { | |
157 | return trace; | |
158 | } | |
159 | } | |
d3eb6e8f PP |
160 | return NULL; |
161 | } | |
162 | ||
7cdc2bab MD |
163 | static |
164 | void lttng_live_destroy_trace(struct bt_object *obj) | |
165 | { | |
166 | struct lttng_live_trace *trace = container_of(obj, struct lttng_live_trace, obj); | |
167 | ||
087bc060 | 168 | BT_LOGI("Destroy trace"); |
7cdc2bab MD |
169 | assert(bt_list_empty(&trace->streams)); |
170 | bt_list_del(&trace->node); | |
171 | lttng_live_metadata_fini(trace); | |
172 | BT_PUT(trace->cc_prio_map); | |
173 | g_free(trace); | |
174 | } | |
175 | ||
176 | static | |
177 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
178 | uint64_t trace_id) | |
179 | { | |
180 | struct lttng_live_trace *trace = NULL; | |
181 | ||
182 | trace = g_new0(struct lttng_live_trace, 1); | |
183 | if (!trace) { | |
184 | goto error; | |
185 | } | |
186 | trace->session = session; | |
187 | trace->id = trace_id; | |
188 | BT_INIT_LIST_HEAD(&trace->streams); | |
189 | trace->new_metadata_needed = true; | |
190 | bt_list_add(&trace->node, &session->traces); | |
191 | bt_object_init(&trace->obj, lttng_live_destroy_trace); | |
087bc060 | 192 | BT_LOGI("Create trace"); |
7cdc2bab MD |
193 | goto end; |
194 | error: | |
195 | g_free(trace); | |
196 | trace = NULL; | |
197 | end: | |
198 | return trace; | |
199 | } | |
200 | ||
201 | BT_HIDDEN | |
202 | struct lttng_live_trace *lttng_live_ref_trace(struct lttng_live_session *session, | |
203 | uint64_t trace_id) | |
204 | { | |
205 | struct lttng_live_trace *trace; | |
206 | ||
207 | trace = lttng_live_find_trace(session, trace_id); | |
208 | if (trace) { | |
209 | bt_get(trace); | |
210 | return trace; | |
211 | } | |
212 | return lttng_live_create_trace(session, trace_id); | |
213 | } | |
214 | ||
215 | BT_HIDDEN | |
216 | void lttng_live_unref_trace(struct lttng_live_trace *trace) | |
217 | { | |
218 | bt_put(trace); | |
219 | } | |
220 | ||
221 | static | |
222 | void lttng_live_close_trace_streams(struct lttng_live_trace *trace) | |
223 | { | |
224 | struct lttng_live_stream_iterator *stream, *s; | |
225 | ||
226 | bt_list_for_each_entry_safe(stream, s, &trace->streams, node) { | |
227 | lttng_live_stream_iterator_destroy(stream); | |
228 | } | |
229 | lttng_live_metadata_fini(trace); | |
230 | } | |
231 | ||
232 | BT_HIDDEN | |
233 | int lttng_live_add_session(struct lttng_live_component *lttng_live, uint64_t session_id) | |
234 | { | |
235 | int ret = 0; | |
236 | struct lttng_live_session *s; | |
237 | ||
238 | s = g_new0(struct lttng_live_session, 1); | |
239 | if (!s) { | |
240 | goto error; | |
241 | } | |
242 | ||
243 | s->id = session_id; | |
244 | BT_INIT_LIST_HEAD(&s->traces); | |
245 | s->lttng_live = lttng_live; | |
246 | s->new_streams_needed = true; | |
247 | ||
087bc060 | 248 | BT_LOGI("Reading from session %" PRIu64, s->id); |
7cdc2bab MD |
249 | bt_list_add(&s->node, <tng_live->sessions); |
250 | goto end; | |
251 | error: | |
087bc060 | 252 | BT_LOGE("Error adding session"); |
7cdc2bab MD |
253 | g_free(s); |
254 | ret = -1; | |
255 | end: | |
256 | return ret; | |
257 | } | |
258 | ||
259 | static | |
260 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
261 | { | |
262 | struct lttng_live_trace *trace, *t; | |
263 | ||
087bc060 | 264 | BT_LOGI("Destroy session"); |
7cdc2bab MD |
265 | if (session->id != -1ULL) { |
266 | if (lttng_live_detach_session(session)) { | |
267 | /* Old relayd cannot detach sessions. */ | |
087bc060 | 268 | BT_LOGD("Unable to detach session %" PRIu64, |
7cdc2bab MD |
269 | session->id); |
270 | } | |
271 | session->id = -1ULL; | |
272 | } | |
273 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
274 | lttng_live_close_trace_streams(trace); | |
275 | } | |
276 | bt_list_del(&session->node); | |
277 | g_free(session); | |
278 | } | |
279 | ||
280 | BT_HIDDEN | |
281 | void lttng_live_iterator_finalize(struct bt_private_notification_iterator *it) | |
282 | { | |
283 | struct lttng_live_stream_iterator_generic *s = | |
284 | bt_private_notification_iterator_get_user_data(it); | |
285 | ||
286 | switch (s->type) { | |
287 | case LIVE_STREAM_TYPE_NO_STREAM: | |
288 | { | |
289 | /* Leave no_stream_iter in place when port is removed. */ | |
290 | break; | |
291 | } | |
292 | case LIVE_STREAM_TYPE_STREAM: | |
293 | { | |
294 | struct lttng_live_stream_iterator *stream_iter = | |
295 | container_of(s, struct lttng_live_stream_iterator, p); | |
296 | ||
297 | lttng_live_stream_iterator_destroy(stream_iter); | |
298 | break; | |
299 | } | |
300 | } | |
301 | } | |
302 | ||
303 | static | |
304 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( | |
305 | struct lttng_live_component *lttng_live, | |
306 | struct lttng_live_stream_iterator *lttng_live_stream) | |
307 | { | |
308 | switch (lttng_live_stream->state) { | |
309 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
310 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
311 | break; | |
312 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
313 | /* Invalid state. */ | |
087bc060 MD |
314 | BT_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
315 | abort(); | |
7cdc2bab MD |
316 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
317 | /* Invalid state. */ | |
087bc060 MD |
318 | BT_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
319 | abort(); | |
7cdc2bab MD |
320 | case LTTNG_LIVE_STREAM_EOF: |
321 | break; | |
322 | } | |
323 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
324 | } | |
325 | ||
326 | /* | |
327 | * For active no data stream, fetch next data. It can be either: | |
328 | * - quiescent: need to put it in the prio heap at quiescent end | |
329 | * timestamp, | |
330 | * - have data: need to wire up first event into the prio heap, | |
331 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
332 | * return EOF. | |
333 | */ | |
334 | static | |
335 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( | |
336 | struct lttng_live_component *lttng_live, | |
337 | struct lttng_live_stream_iterator *lttng_live_stream) | |
338 | { | |
339 | enum bt_ctf_lttng_live_iterator_status ret = | |
340 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
341 | struct packet_index index; | |
342 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; | |
343 | ||
344 | if (lttng_live_stream->trace->new_metadata_needed) { | |
345 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
346 | goto end; | |
347 | } | |
348 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
349 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
350 | goto end; | |
351 | } | |
352 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA | |
353 | && lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
354 | goto end; | |
355 | } | |
356 | ret = lttng_live_get_next_index(lttng_live, lttng_live_stream, &index); | |
357 | if (ret != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
358 | goto end; | |
359 | } | |
360 | assert(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); | |
361 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { | |
362 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA | |
363 | && lttng_live_stream->last_returned_inactivity_timestamp == | |
364 | lttng_live_stream->current_inactivity_timestamp) { | |
365 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
366 | print_stream_state(lttng_live_stream); | |
367 | } else { | |
368 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
369 | } | |
370 | goto end; | |
371 | } | |
372 | lttng_live_stream->base_offset = index.offset; | |
373 | lttng_live_stream->offset = index.offset; | |
374 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
375 | end: | |
376 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
377 | ret = lttng_live_iterator_next_check_stream_state( | |
378 | lttng_live, lttng_live_stream); | |
379 | } | |
380 | return ret; | |
381 | } | |
382 | ||
383 | /* | |
384 | * Creation of the notification requires the ctf trace to be created | |
385 | * beforehand, but the live protocol gives us all streams (including | |
386 | * metadata) at once. So we split it in three steps: getting streams, | |
387 | * getting metadata (which creates the ctf trace), and then creating the | |
388 | * per-stream notifications. | |
389 | */ | |
390 | static | |
391 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_session( | |
392 | struct lttng_live_component *lttng_live, | |
393 | struct lttng_live_session *session) | |
394 | { | |
395 | enum bt_ctf_lttng_live_iterator_status status; | |
396 | struct lttng_live_trace *trace, *t; | |
397 | ||
398 | if (lttng_live_attach_session(session)) { | |
399 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
400 | } | |
401 | status = lttng_live_get_new_streams(session); | |
402 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && | |
403 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
404 | return status; | |
405 | } | |
406 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
407 | status = lttng_live_metadata_update(trace); | |
408 | if (status == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
409 | int retval; | |
410 | ||
411 | retval = bt_ctf_trace_set_is_static(trace->trace); | |
412 | assert(!retval); | |
413 | } else if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
414 | return status; | |
415 | } | |
416 | } | |
417 | return lttng_live_lazy_notif_init(session); | |
418 | } | |
419 | ||
420 | BT_HIDDEN | |
421 | void lttng_live_need_new_streams(struct lttng_live_component *lttng_live) | |
422 | { | |
423 | struct lttng_live_session *session; | |
424 | ||
425 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
426 | session->new_streams_needed = true; | |
427 | } | |
428 | } | |
429 | ||
430 | static | |
431 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_component *lttng_live) | |
432 | { | |
433 | struct lttng_live_session *session; | |
434 | ||
435 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
436 | struct lttng_live_trace *trace; | |
437 | ||
438 | session->new_streams_needed = true; | |
439 | bt_list_for_each_entry(trace, &session->traces, node) { | |
440 | trace->new_metadata_needed = true; | |
441 | } | |
442 | } | |
443 | } | |
444 | ||
445 | static | |
446 | enum bt_notification_iterator_status lttng_live_iterator_next_handle_new_streams_and_metadata( | |
447 | struct lttng_live_component *lttng_live) | |
448 | { | |
449 | enum bt_ctf_lttng_live_iterator_status ret = | |
450 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
451 | unsigned int nr_sessions_opened = 0; | |
452 | struct lttng_live_session *session, *s; | |
453 | ||
454 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
455 | if (session->closed && bt_list_empty(&session->traces)) { | |
456 | lttng_live_destroy_session(session); | |
457 | } | |
458 | } | |
459 | /* | |
460 | * Currently, when there are no sessions, we quit immediately. | |
461 | * We may want to add a component parameter to keep trying until | |
462 | * we get data in the future. | |
463 | * Also, in a remotely distant future, we could add a "new | |
464 | * session" flag to the protocol, which would tell us that we | |
465 | * need to query for new sessions even though we have sessions | |
466 | * currently ongoing. | |
467 | */ | |
468 | if (bt_list_empty(<tng_live->sessions)) { | |
469 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
470 | goto end; | |
471 | } | |
472 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
473 | ret = lttng_live_get_session(lttng_live, session); | |
474 | switch (ret) { | |
475 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
476 | break; | |
477 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
478 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
479 | break; | |
480 | default: | |
481 | goto end; | |
482 | } | |
483 | if (!session->closed) { | |
484 | nr_sessions_opened++; | |
485 | } | |
486 | } | |
487 | end: | |
488 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && !nr_sessions_opened) { | |
489 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
490 | } | |
491 | return ret; | |
492 | } | |
493 | ||
494 | static | |
495 | enum bt_ctf_lttng_live_iterator_status emit_inactivity_notification( | |
496 | struct lttng_live_component *lttng_live, | |
497 | struct lttng_live_stream_iterator *lttng_live_stream, | |
498 | struct bt_notification **notification, | |
499 | uint64_t timestamp) | |
500 | { | |
501 | enum bt_ctf_lttng_live_iterator_status ret = | |
502 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
503 | struct lttng_live_trace *trace; | |
504 | struct bt_ctf_clock_class *clock_class = NULL; | |
505 | struct bt_ctf_clock_value *clock_value = NULL; | |
506 | struct bt_notification *notif = NULL; | |
507 | int retval; | |
508 | ||
509 | trace = lttng_live_stream->trace; | |
510 | if (!trace) { | |
511 | goto error; | |
512 | } | |
513 | clock_class = bt_clock_class_priority_map_get_clock_class_by_index(trace->cc_prio_map, 0); | |
514 | if (!clock_class) { | |
515 | goto error; | |
516 | } | |
517 | clock_value = bt_ctf_clock_value_create(clock_class, timestamp); | |
518 | if (!clock_value) { | |
519 | goto error; | |
520 | } | |
521 | notif = bt_notification_inactivity_create(trace->cc_prio_map); | |
522 | if (!notif) { | |
523 | goto error; | |
524 | } | |
525 | retval = bt_notification_inactivity_set_clock_value(notif, clock_value); | |
526 | if (retval) { | |
527 | goto error; | |
528 | } | |
529 | *notification = notif; | |
530 | end: | |
531 | bt_put(clock_value); | |
532 | bt_put(clock_class); | |
533 | return ret; | |
534 | ||
535 | error: | |
536 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
537 | bt_put(notif); | |
538 | goto end; | |
539 | } | |
540 | ||
541 | static | |
542 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( | |
543 | struct lttng_live_component *lttng_live, | |
544 | struct lttng_live_stream_iterator *lttng_live_stream, | |
545 | struct bt_notification **notification) | |
546 | { | |
547 | enum bt_ctf_lttng_live_iterator_status ret = | |
548 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
549 | struct bt_ctf_clock_class *clock_class = NULL; | |
550 | struct bt_ctf_clock_value *clock_value = NULL; | |
551 | ||
552 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
553 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
554 | } | |
555 | ||
556 | if (lttng_live_stream->current_inactivity_timestamp == | |
557 | lttng_live_stream->last_returned_inactivity_timestamp) { | |
558 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; | |
559 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
560 | goto end; | |
561 | } | |
562 | ||
563 | ret = emit_inactivity_notification(lttng_live, lttng_live_stream, notification, | |
564 | (uint64_t) lttng_live_stream->current_inactivity_timestamp); | |
565 | ||
566 | lttng_live_stream->last_returned_inactivity_timestamp = | |
567 | lttng_live_stream->current_inactivity_timestamp; | |
568 | end: | |
569 | bt_put(clock_value); | |
570 | bt_put(clock_class); | |
571 | return ret; | |
572 | } | |
573 | ||
574 | static | |
575 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( | |
576 | struct lttng_live_component *lttng_live, | |
577 | struct lttng_live_stream_iterator *lttng_live_stream, | |
578 | struct bt_notification **notification) | |
579 | { | |
580 | enum bt_ctf_lttng_live_iterator_status ret = | |
581 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
582 | enum bt_ctf_notif_iter_status status; | |
583 | struct lttng_live_session *session; | |
584 | ||
585 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
586 | struct lttng_live_trace *trace; | |
587 | ||
588 | if (session->new_streams_needed) { | |
589 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
590 | } | |
591 | bt_list_for_each_entry(trace, &session->traces, node) { | |
592 | if (trace->new_metadata_needed) { | |
593 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
594 | } | |
595 | } | |
596 | } | |
597 | ||
598 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
599 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
600 | } | |
601 | if (lttng_live_stream->packet_end_notif_queue) { | |
602 | *notification = lttng_live_stream->packet_end_notif_queue; | |
603 | lttng_live_stream->packet_end_notif_queue = NULL; | |
604 | status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
605 | } else { | |
606 | status = bt_ctf_notif_iter_get_next_notification( | |
607 | lttng_live_stream->notif_iter, | |
608 | lttng_live_stream->trace->cc_prio_map, | |
609 | notification); | |
610 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { | |
611 | /* | |
612 | * Consider empty packets as inactivity. | |
613 | */ | |
614 | if (bt_notification_get_type(*notification) == BT_NOTIFICATION_TYPE_PACKET_END) { | |
615 | lttng_live_stream->packet_end_notif_queue = *notification; | |
616 | *notification = NULL; | |
617 | return emit_inactivity_notification(lttng_live, | |
618 | lttng_live_stream, notification, | |
619 | lttng_live_stream->current_packet_end_timestamp); | |
620 | } | |
621 | } | |
622 | } | |
623 | switch (status) { | |
624 | case BT_CTF_NOTIF_ITER_STATUS_EOF: | |
625 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
626 | break; | |
627 | case BT_CTF_NOTIF_ITER_STATUS_OK: | |
628 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
629 | break; | |
630 | case BT_CTF_NOTIF_ITER_STATUS_AGAIN: | |
631 | /* | |
632 | * Continue immediately (end of packet). The next | |
633 | * get_index may return AGAIN to delay the following | |
634 | * attempt. | |
635 | */ | |
636 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
637 | break; | |
638 | case BT_CTF_NOTIF_ITER_STATUS_INVAL: | |
639 | /* No argument provided by the user, so don't return INVAL. */ | |
640 | case BT_CTF_NOTIF_ITER_STATUS_ERROR: | |
641 | default: | |
642 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
643 | break; | |
644 | } | |
645 | return ret; | |
646 | } | |
647 | ||
648 | /* | |
649 | * helper function: | |
650 | * handle_no_data_streams() | |
651 | * retry: | |
652 | * - for each ACTIVE_NO_DATA stream: | |
653 | * - query relayd for stream data, or quiescence info. | |
654 | * - if need metadata, get metadata, goto retry. | |
655 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
656 | * - if quiescent, move to QUIESCENT streams | |
657 | * - if fetched data, move to ACTIVE_DATA streams | |
658 | * (at this point each stream either has data, or is quiescent) | |
659 | * | |
660 | * | |
661 | * iterator_next: | |
662 | * handle_new_streams_and_metadata() | |
663 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
664 | * - query relayd for metadata | |
665 | * | |
666 | * call handle_active_no_data_streams() | |
667 | * | |
668 | * handle_quiescent_streams() | |
669 | * - if at least one stream is ACTIVE_DATA: | |
670 | * - peek stream event with lowest timestamp -> next_ts | |
671 | * - for each quiescent stream | |
672 | * - if next_ts >= quiescent end | |
673 | * - set state to ACTIVE_NO_DATA | |
674 | * - else | |
675 | * - for each quiescent stream | |
676 | * - set state to ACTIVE_NO_DATA | |
677 | * | |
678 | * call handle_active_no_data_streams() | |
679 | * | |
680 | * handle_active_data_streams() | |
681 | * - if at least one stream is ACTIVE_DATA: | |
682 | * - get stream event with lowest timestamp from heap | |
683 | * - make that stream event the current notification. | |
684 | * - move this stream heap position to its next event | |
685 | * - if we need to fetch data from relayd, move | |
686 | * stream to ACTIVE_NO_DATA. | |
687 | * - return OK | |
688 | * - return AGAIN | |
689 | * | |
690 | * end criterion: ctrl-c on client. If relayd exits or the session | |
691 | * closes on the relay daemon side, we keep on waiting for streams. | |
692 | * Eventually handle --end timestamp (also an end criterion). | |
693 | * | |
694 | * When disconnected from relayd: try to re-connect endlessly. | |
695 | */ | |
696 | static | |
697 | struct bt_notification_iterator_next_return lttng_live_iterator_next_stream( | |
698 | struct bt_private_notification_iterator *iterator, | |
699 | struct lttng_live_stream_iterator *stream_iter) | |
700 | { | |
701 | enum bt_ctf_lttng_live_iterator_status status; | |
702 | struct bt_notification_iterator_next_return next_return; | |
703 | struct lttng_live_component *lttng_live; | |
704 | ||
705 | lttng_live = stream_iter->trace->session->lttng_live; | |
706 | retry: | |
707 | print_stream_state(stream_iter); | |
708 | next_return.notification = NULL; | |
709 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
710 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
711 | goto end; | |
712 | } | |
713 | status = lttng_live_iterator_next_handle_one_no_data_stream( | |
714 | lttng_live, stream_iter); | |
715 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
716 | goto end; | |
717 | } | |
718 | status = lttng_live_iterator_next_handle_one_quiescent_stream( | |
719 | lttng_live, stream_iter, &next_return.notification); | |
720 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
721 | assert(next_return.notification == NULL); | |
722 | goto end; | |
723 | } | |
724 | if (next_return.notification) { | |
725 | goto end; | |
726 | } | |
727 | status = lttng_live_iterator_next_handle_one_active_data_stream(lttng_live, | |
728 | stream_iter, &next_return.notification); | |
729 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
730 | assert(next_return.notification == NULL); | |
731 | } | |
732 | ||
733 | end: | |
734 | switch (status) { | |
735 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
736 | print_dbg("continue"); | |
737 | goto retry; | |
738 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
739 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
740 | print_dbg("again"); | |
741 | break; | |
742 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
743 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
744 | print_dbg("end"); | |
745 | break; | |
746 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
747 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
748 | print_dbg("ok"); | |
749 | break; | |
750 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
751 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
752 | break; | |
753 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
754 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
755 | break; | |
756 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
757 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
758 | break; | |
759 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
760 | default: /* fall-through */ | |
761 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
762 | break; | |
763 | } | |
764 | return next_return; | |
765 | } | |
766 | ||
767 | static | |
768 | struct bt_notification_iterator_next_return lttng_live_iterator_next_no_stream( | |
769 | struct bt_private_notification_iterator *iterator, | |
770 | struct lttng_live_no_stream_iterator *no_stream_iter) | |
771 | { | |
772 | enum bt_ctf_lttng_live_iterator_status status; | |
773 | struct bt_notification_iterator_next_return next_return; | |
774 | struct lttng_live_component *lttng_live; | |
775 | ||
776 | lttng_live = no_stream_iter->lttng_live; | |
777 | retry: | |
778 | lttng_live_force_new_streams_and_metadata(lttng_live); | |
779 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
780 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
781 | goto end; | |
782 | } | |
783 | if (no_stream_iter->port) { | |
784 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
785 | } else { | |
786 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
787 | } | |
788 | end: | |
789 | switch (status) { | |
790 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
791 | goto retry; | |
792 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
793 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
794 | break; | |
795 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
796 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
797 | break; | |
798 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
799 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
800 | break; | |
801 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
802 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
803 | break; | |
804 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
805 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
806 | break; | |
807 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
808 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
809 | break; | |
810 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
811 | default: /* fall-through */ | |
812 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
813 | break; | |
814 | } | |
815 | return next_return; | |
816 | } | |
817 | ||
d3eb6e8f | 818 | BT_HIDDEN |
41a2b7ae | 819 | struct bt_notification_iterator_next_return lttng_live_iterator_next( |
890882ef | 820 | struct bt_private_notification_iterator *iterator) |
d3eb6e8f | 821 | { |
7cdc2bab MD |
822 | struct lttng_live_stream_iterator_generic *s = |
823 | bt_private_notification_iterator_get_user_data(iterator); | |
824 | struct bt_notification_iterator_next_return next_return; | |
825 | ||
826 | switch (s->type) { | |
827 | case LIVE_STREAM_TYPE_NO_STREAM: | |
828 | next_return = lttng_live_iterator_next_no_stream(iterator, | |
829 | container_of(s, struct lttng_live_no_stream_iterator, p)); | |
830 | break; | |
831 | case LIVE_STREAM_TYPE_STREAM: | |
832 | next_return = lttng_live_iterator_next_stream(iterator, | |
833 | container_of(s, struct lttng_live_stream_iterator, p)); | |
834 | break; | |
835 | default: | |
836 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
837 | break; | |
838 | } | |
839 | return next_return; | |
840 | } | |
41a2b7ae | 841 | |
7cdc2bab MD |
842 | BT_HIDDEN |
843 | enum bt_notification_iterator_status lttng_live_iterator_init( | |
844 | struct bt_private_notification_iterator *it, | |
845 | struct bt_private_port *port) | |
846 | { | |
847 | enum bt_notification_iterator_status ret = | |
848 | BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
849 | struct lttng_live_stream_iterator_generic *s; | |
7cdc2bab MD |
850 | |
851 | assert(it); | |
852 | ||
853 | s = bt_private_port_get_user_data(port); | |
854 | assert(s); | |
855 | switch (s->type) { | |
856 | case LIVE_STREAM_TYPE_NO_STREAM: | |
857 | { | |
858 | struct lttng_live_no_stream_iterator *no_stream_iter = | |
859 | container_of(s, struct lttng_live_no_stream_iterator, p); | |
7cdc2bab MD |
860 | ret = bt_private_notification_iterator_set_user_data(it, no_stream_iter); |
861 | if (ret) { | |
862 | goto error; | |
863 | } | |
864 | break; | |
865 | } | |
866 | case LIVE_STREAM_TYPE_STREAM: | |
867 | { | |
868 | struct lttng_live_stream_iterator *stream_iter = | |
869 | container_of(s, struct lttng_live_stream_iterator, p); | |
7cdc2bab MD |
870 | ret = bt_private_notification_iterator_set_user_data(it, stream_iter); |
871 | if (ret) { | |
872 | goto error; | |
873 | } | |
874 | break; | |
875 | } | |
876 | default: | |
877 | ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
878 | goto end; | |
879 | } | |
880 | ||
881 | end: | |
41a2b7ae | 882 | return ret; |
7cdc2bab MD |
883 | error: |
884 | if (bt_private_notification_iterator_set_user_data(it, NULL) | |
885 | != BT_NOTIFICATION_ITERATOR_STATUS_OK) { | |
087bc060 | 886 | BT_LOGE("Error setting private data to NULL"); |
7cdc2bab MD |
887 | } |
888 | goto end; | |
889 | } | |
890 | ||
891 | static | |
892 | struct bt_value *lttng_live_query_list_sessions(struct bt_component_class *comp_class, | |
893 | struct bt_value *params) | |
894 | { | |
895 | struct bt_value *url_value = NULL; | |
896 | struct bt_value *results = NULL; | |
897 | const char *url; | |
898 | struct bt_live_viewer_connection *viewer_connection = NULL; | |
899 | enum bt_value_status ret; | |
900 | ||
901 | url_value = bt_value_map_get(params, "url"); | |
902 | if (!url_value || bt_value_is_null(url_value) || !bt_value_is_string(url_value)) { | |
087bc060 | 903 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
904 | goto error; |
905 | } | |
906 | ||
907 | ret = bt_value_string_get(url_value, &url); | |
908 | if (ret != BT_VALUE_STATUS_OK) { | |
087bc060 | 909 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
910 | goto error; |
911 | } | |
912 | ||
913 | viewer_connection = bt_live_viewer_connection_create(url, stderr); | |
914 | if (!viewer_connection) { | |
915 | ret = BT_COMPONENT_STATUS_NOMEM; | |
916 | goto error; | |
917 | } | |
918 | ||
919 | results = bt_live_viewer_connection_list_sessions(viewer_connection); | |
920 | goto end; | |
921 | error: | |
922 | BT_PUT(results); | |
923 | end: | |
924 | if (viewer_connection) { | |
925 | bt_live_viewer_connection_destroy(viewer_connection); | |
926 | } | |
927 | BT_PUT(url_value); | |
928 | return results; | |
929 | } | |
930 | ||
931 | BT_HIDDEN | |
932 | struct bt_value *lttng_live_query(struct bt_component_class *comp_class, | |
933 | const char *object, struct bt_value *params) | |
934 | { | |
935 | if (strcmp(object, "sessions") == 0) { | |
936 | return lttng_live_query_list_sessions(comp_class, | |
937 | params); | |
938 | } | |
087bc060 | 939 | BT_LOGW("Unknown query object `%s`", object); |
7cdc2bab MD |
940 | return NULL; |
941 | } | |
942 | ||
943 | static | |
944 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
945 | { | |
946 | int ret; | |
947 | struct lttng_live_session *session, *s; | |
948 | ||
949 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
950 | lttng_live_destroy_session(session); | |
951 | } | |
952 | BT_PUT(lttng_live->viewer_connection); | |
953 | if (lttng_live->url) { | |
954 | g_string_free(lttng_live->url, TRUE); | |
955 | } | |
956 | if (lttng_live->no_stream_port) { | |
957 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
958 | assert(!ret); | |
959 | BT_PUT(lttng_live->no_stream_port); | |
960 | } | |
961 | if (lttng_live->no_stream_iter) { | |
962 | g_free(lttng_live->no_stream_iter); | |
963 | } | |
964 | g_free(lttng_live); | |
965 | } | |
966 | ||
967 | BT_HIDDEN | |
968 | void lttng_live_component_finalize(struct bt_private_component *component) | |
969 | { | |
970 | void *data = bt_private_component_get_user_data(component); | |
971 | ||
972 | if (!data) { | |
973 | return; | |
974 | } | |
975 | lttng_live_component_destroy_data(data); | |
976 | } | |
977 | ||
978 | static | |
979 | struct lttng_live_component *lttng_live_component_create(struct bt_value *params, | |
980 | struct bt_private_component *private_component) | |
981 | { | |
982 | struct lttng_live_component *lttng_live; | |
983 | struct bt_value *value = NULL; | |
984 | const char *url; | |
985 | enum bt_value_status ret; | |
986 | ||
987 | lttng_live = g_new0(struct lttng_live_component, 1); | |
988 | if (!lttng_live) { | |
989 | goto end; | |
990 | } | |
7cdc2bab MD |
991 | /* TODO: make this an overridable parameter. */ |
992 | lttng_live->max_query_size = MAX_QUERY_SIZE; | |
993 | BT_INIT_LIST_HEAD(<tng_live->sessions); | |
994 | value = bt_value_map_get(params, "url"); | |
995 | if (!value || bt_value_is_null(value) || !bt_value_is_string(value)) { | |
087bc060 | 996 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
997 | goto error; |
998 | } | |
999 | ret = bt_value_string_get(value, &url); | |
1000 | if (ret != BT_VALUE_STATUS_OK) { | |
087bc060 | 1001 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
1002 | goto error; |
1003 | } | |
1004 | lttng_live->url = g_string_new(url); | |
1005 | if (!lttng_live->url) { | |
1006 | goto error; | |
1007 | } | |
1008 | lttng_live->viewer_connection = | |
1009 | bt_live_viewer_connection_create(lttng_live->url->str, | |
1010 | stderr); | |
1011 | if (!lttng_live->viewer_connection) { | |
1012 | ret = BT_COMPONENT_STATUS_NOMEM; | |
1013 | goto error; | |
1014 | } | |
1015 | if (lttng_live_create_viewer_session(lttng_live)) { | |
1016 | ret = BT_COMPONENT_STATUS_ERROR; | |
1017 | goto error; | |
1018 | } | |
1019 | lttng_live->private_component = private_component; | |
1020 | ||
1021 | goto end; | |
1022 | ||
1023 | error: | |
1024 | lttng_live_component_destroy_data(lttng_live); | |
1025 | lttng_live = NULL; | |
1026 | end: | |
1027 | return lttng_live; | |
d3e4dcd8 PP |
1028 | } |
1029 | ||
f3bc2010 | 1030 | BT_HIDDEN |
7cdc2bab MD |
1031 | enum bt_component_status lttng_live_component_init(struct bt_private_component *component, |
1032 | struct bt_value *params, void *init_method_data) | |
f3bc2010 | 1033 | { |
7cdc2bab MD |
1034 | struct lttng_live_component *lttng_live; |
1035 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; | |
1036 | ||
7cdc2bab MD |
1037 | /* Passes ownership of iter ref to lttng_live_component_create. */ |
1038 | lttng_live = lttng_live_component_create(params, component); | |
1039 | if (!lttng_live) { | |
1040 | ret = BT_COMPONENT_STATUS_NOMEM; | |
1041 | goto end; | |
1042 | } | |
1043 | ||
1044 | lttng_live->no_stream_iter = g_new0(struct lttng_live_no_stream_iterator, 1); | |
1045 | lttng_live->no_stream_iter->p.type = LIVE_STREAM_TYPE_NO_STREAM; | |
1046 | lttng_live->no_stream_iter->lttng_live = lttng_live; | |
1047 | ||
1048 | lttng_live->no_stream_port = | |
1049 | bt_private_component_source_add_output_private_port( | |
1050 | lttng_live->private_component, "no-stream", | |
1051 | lttng_live->no_stream_iter); | |
1052 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; | |
1053 | ||
1054 | ret = bt_private_component_set_user_data(component, lttng_live); | |
1055 | if (ret != BT_COMPONENT_STATUS_OK) { | |
1056 | goto error; | |
1057 | } | |
1058 | ||
1059 | end: | |
1060 | return ret; | |
1061 | error: | |
1062 | (void) bt_private_component_set_user_data(component, NULL); | |
1063 | lttng_live_component_destroy_data(lttng_live); | |
1064 | return ret; | |
f3bc2010 | 1065 | } |
087bc060 | 1066 | |
d85ef162 MD |
1067 | BT_HIDDEN |
1068 | enum bt_component_status lttng_live_accept_port_connection( | |
1069 | struct bt_private_component *private_component, | |
1070 | struct bt_private_port *self_private_port, | |
1071 | struct bt_port *other_port) | |
1072 | { | |
1073 | struct lttng_live_component *lttng_live = | |
1074 | bt_private_component_get_user_data(private_component); | |
1075 | struct bt_component *other_component; | |
1076 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; | |
1077 | struct bt_port *self_port = bt_port_from_private_port(self_private_port); | |
1078 | ||
1079 | other_component = bt_port_get_component(other_port); | |
1080 | bt_put(other_component); /* weak */ | |
1081 | ||
1082 | if (!lttng_live->downstream_component) { | |
1083 | lttng_live->downstream_component = other_component; | |
1084 | goto end; | |
1085 | } | |
1086 | ||
1087 | /* | |
1088 | * Compare prior component to ensure we are connected to the | |
1089 | * same downstream component as prior ports. | |
1090 | */ | |
1091 | if (lttng_live->downstream_component != other_component) { | |
1092 | BT_LOGW("Cannot connect ctf.lttng-live component port \"%s\" to component \"%s\": already connected to component \"%s\".", | |
1093 | bt_port_get_name(self_port), | |
1094 | bt_component_get_name(other_component), | |
1095 | bt_component_get_name(lttng_live->downstream_component)); | |
1096 | status = BT_COMPONENT_STATUS_REFUSE_PORT_CONNECTION; | |
1097 | goto end; | |
1098 | } | |
1099 | end: | |
1100 | bt_put(self_port); | |
1101 | return status; | |
1102 | } | |
1103 | ||
087bc060 MD |
1104 | static |
1105 | void __attribute__((constructor)) bt_lttng_live_logging_ctor(void) | |
1106 | { | |
1107 | enum bt_logging_level log_level = BT_LOG_NONE; | |
047358f9 | 1108 | const char *log_level_env = getenv(BT_LOGLEVEL_NAME); |
087bc060 MD |
1109 | |
1110 | if (!log_level_env) { | |
1111 | return; | |
1112 | } | |
1113 | ||
1114 | if (strcmp(log_level_env, "VERBOSE") == 0) { | |
1115 | log_level = BT_LOGGING_LEVEL_VERBOSE; | |
1116 | } else if (strcmp(log_level_env, "DEBUG") == 0) { | |
1117 | log_level = BT_LOGGING_LEVEL_DEBUG; | |
1118 | } else if (strcmp(log_level_env, "INFO") == 0) { | |
1119 | log_level = BT_LOGGING_LEVEL_INFO; | |
1120 | } else if (strcmp(log_level_env, "WARN") == 0) { | |
1121 | log_level = BT_LOGGING_LEVEL_WARN; | |
1122 | } else if (strcmp(log_level_env, "ERROR") == 0) { | |
1123 | log_level = BT_LOGGING_LEVEL_ERROR; | |
1124 | } else if (strcmp(log_level_env, "FATAL") == 0) { | |
1125 | log_level = BT_LOGGING_LEVEL_FATAL; | |
d85ef162 MD |
1126 | } else { |
1127 | bt_lttng_live_log_level = BT_LOGGING_LEVEL_FATAL; | |
047358f9 MD |
1128 | BT_LOGF("Incorrect log level specified in %s", |
1129 | BT_LOGLEVEL_NAME); | |
d85ef162 | 1130 | abort(); |
087bc060 MD |
1131 | } |
1132 | ||
1133 | bt_lttng_live_log_level = log_level; | |
1134 | } |