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); | |
5bd230f4 | 167 | int retval; |
7cdc2bab | 168 | |
087bc060 | 169 | BT_LOGI("Destroy trace"); |
7cdc2bab MD |
170 | assert(bt_list_empty(&trace->streams)); |
171 | bt_list_del(&trace->node); | |
5bd230f4 MD |
172 | |
173 | retval = bt_ctf_trace_set_is_static(trace->trace); | |
174 | assert(!retval); | |
175 | ||
7cdc2bab MD |
176 | lttng_live_metadata_fini(trace); |
177 | BT_PUT(trace->cc_prio_map); | |
178 | g_free(trace); | |
179 | } | |
180 | ||
181 | static | |
182 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
183 | uint64_t trace_id) | |
184 | { | |
185 | struct lttng_live_trace *trace = NULL; | |
186 | ||
187 | trace = g_new0(struct lttng_live_trace, 1); | |
188 | if (!trace) { | |
189 | goto error; | |
190 | } | |
191 | trace->session = session; | |
192 | trace->id = trace_id; | |
193 | BT_INIT_LIST_HEAD(&trace->streams); | |
194 | trace->new_metadata_needed = true; | |
195 | bt_list_add(&trace->node, &session->traces); | |
196 | bt_object_init(&trace->obj, lttng_live_destroy_trace); | |
087bc060 | 197 | BT_LOGI("Create trace"); |
7cdc2bab MD |
198 | goto end; |
199 | error: | |
200 | g_free(trace); | |
201 | trace = NULL; | |
202 | end: | |
203 | return trace; | |
204 | } | |
205 | ||
206 | BT_HIDDEN | |
207 | struct lttng_live_trace *lttng_live_ref_trace(struct lttng_live_session *session, | |
208 | uint64_t trace_id) | |
209 | { | |
210 | struct lttng_live_trace *trace; | |
211 | ||
212 | trace = lttng_live_find_trace(session, trace_id); | |
213 | if (trace) { | |
214 | bt_get(trace); | |
215 | return trace; | |
216 | } | |
217 | return lttng_live_create_trace(session, trace_id); | |
218 | } | |
219 | ||
220 | BT_HIDDEN | |
221 | void lttng_live_unref_trace(struct lttng_live_trace *trace) | |
222 | { | |
223 | bt_put(trace); | |
224 | } | |
225 | ||
226 | static | |
227 | void lttng_live_close_trace_streams(struct lttng_live_trace *trace) | |
228 | { | |
229 | struct lttng_live_stream_iterator *stream, *s; | |
230 | ||
231 | bt_list_for_each_entry_safe(stream, s, &trace->streams, node) { | |
232 | lttng_live_stream_iterator_destroy(stream); | |
233 | } | |
234 | lttng_live_metadata_fini(trace); | |
235 | } | |
236 | ||
237 | BT_HIDDEN | |
238 | int lttng_live_add_session(struct lttng_live_component *lttng_live, uint64_t session_id) | |
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; | |
252 | ||
087bc060 | 253 | BT_LOGI("Reading from session %" PRIu64, s->id); |
7cdc2bab MD |
254 | bt_list_add(&s->node, <tng_live->sessions); |
255 | goto end; | |
256 | error: | |
087bc060 | 257 | BT_LOGE("Error adding session"); |
7cdc2bab MD |
258 | g_free(s); |
259 | ret = -1; | |
260 | end: | |
261 | return ret; | |
262 | } | |
263 | ||
264 | static | |
265 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
266 | { | |
267 | struct lttng_live_trace *trace, *t; | |
268 | ||
087bc060 | 269 | BT_LOGI("Destroy session"); |
7cdc2bab MD |
270 | if (session->id != -1ULL) { |
271 | if (lttng_live_detach_session(session)) { | |
272 | /* Old relayd cannot detach sessions. */ | |
087bc060 | 273 | BT_LOGD("Unable to detach session %" PRIu64, |
7cdc2bab MD |
274 | session->id); |
275 | } | |
276 | session->id = -1ULL; | |
277 | } | |
278 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
279 | lttng_live_close_trace_streams(trace); | |
280 | } | |
281 | bt_list_del(&session->node); | |
282 | g_free(session); | |
283 | } | |
284 | ||
285 | BT_HIDDEN | |
286 | void lttng_live_iterator_finalize(struct bt_private_notification_iterator *it) | |
287 | { | |
288 | struct lttng_live_stream_iterator_generic *s = | |
289 | bt_private_notification_iterator_get_user_data(it); | |
290 | ||
291 | switch (s->type) { | |
292 | case LIVE_STREAM_TYPE_NO_STREAM: | |
293 | { | |
294 | /* Leave no_stream_iter in place when port is removed. */ | |
295 | break; | |
296 | } | |
297 | case LIVE_STREAM_TYPE_STREAM: | |
298 | { | |
299 | struct lttng_live_stream_iterator *stream_iter = | |
300 | container_of(s, struct lttng_live_stream_iterator, p); | |
301 | ||
302 | lttng_live_stream_iterator_destroy(stream_iter); | |
303 | break; | |
304 | } | |
305 | } | |
306 | } | |
307 | ||
308 | static | |
309 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( | |
310 | struct lttng_live_component *lttng_live, | |
311 | struct lttng_live_stream_iterator *lttng_live_stream) | |
312 | { | |
313 | switch (lttng_live_stream->state) { | |
314 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
315 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
316 | break; | |
317 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
318 | /* Invalid state. */ | |
087bc060 MD |
319 | BT_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
320 | abort(); | |
7cdc2bab MD |
321 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
322 | /* Invalid state. */ | |
087bc060 MD |
323 | BT_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
324 | abort(); | |
7cdc2bab MD |
325 | case LTTNG_LIVE_STREAM_EOF: |
326 | break; | |
327 | } | |
328 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
329 | } | |
330 | ||
331 | /* | |
332 | * For active no data stream, fetch next data. It can be either: | |
333 | * - quiescent: need to put it in the prio heap at quiescent end | |
334 | * timestamp, | |
335 | * - have data: need to wire up first event into the prio heap, | |
336 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
337 | * return EOF. | |
338 | */ | |
339 | static | |
340 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( | |
341 | struct lttng_live_component *lttng_live, | |
342 | struct lttng_live_stream_iterator *lttng_live_stream) | |
343 | { | |
344 | enum bt_ctf_lttng_live_iterator_status ret = | |
345 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
346 | struct packet_index index; | |
347 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; | |
348 | ||
349 | if (lttng_live_stream->trace->new_metadata_needed) { | |
350 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
351 | goto end; | |
352 | } | |
353 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
354 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
355 | goto end; | |
356 | } | |
357 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA | |
358 | && lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
359 | goto end; | |
360 | } | |
361 | ret = lttng_live_get_next_index(lttng_live, lttng_live_stream, &index); | |
362 | if (ret != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
363 | goto end; | |
364 | } | |
365 | assert(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); | |
366 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { | |
367 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA | |
368 | && lttng_live_stream->last_returned_inactivity_timestamp == | |
369 | lttng_live_stream->current_inactivity_timestamp) { | |
370 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
371 | print_stream_state(lttng_live_stream); | |
372 | } else { | |
373 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
374 | } | |
375 | goto end; | |
376 | } | |
377 | lttng_live_stream->base_offset = index.offset; | |
378 | lttng_live_stream->offset = index.offset; | |
379 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
380 | end: | |
381 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
382 | ret = lttng_live_iterator_next_check_stream_state( | |
383 | lttng_live, lttng_live_stream); | |
384 | } | |
385 | return ret; | |
386 | } | |
387 | ||
388 | /* | |
389 | * Creation of the notification requires the ctf trace to be created | |
390 | * beforehand, but the live protocol gives us all streams (including | |
391 | * metadata) at once. So we split it in three steps: getting streams, | |
392 | * getting metadata (which creates the ctf trace), and then creating the | |
393 | * per-stream notifications. | |
394 | */ | |
395 | static | |
396 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_session( | |
397 | struct lttng_live_component *lttng_live, | |
398 | struct lttng_live_session *session) | |
399 | { | |
400 | enum bt_ctf_lttng_live_iterator_status status; | |
401 | struct lttng_live_trace *trace, *t; | |
402 | ||
403 | if (lttng_live_attach_session(session)) { | |
404 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
405 | } | |
406 | status = lttng_live_get_new_streams(session); | |
407 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && | |
408 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
409 | return status; | |
410 | } | |
411 | bt_list_for_each_entry_safe(trace, t, &session->traces, node) { | |
412 | status = lttng_live_metadata_update(trace); | |
5bd230f4 MD |
413 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && |
414 | status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
415 | return status; |
416 | } | |
417 | } | |
418 | return lttng_live_lazy_notif_init(session); | |
419 | } | |
420 | ||
421 | BT_HIDDEN | |
422 | void lttng_live_need_new_streams(struct lttng_live_component *lttng_live) | |
423 | { | |
424 | struct lttng_live_session *session; | |
425 | ||
426 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
427 | session->new_streams_needed = true; | |
428 | } | |
429 | } | |
430 | ||
431 | static | |
432 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_component *lttng_live) | |
433 | { | |
434 | struct lttng_live_session *session; | |
435 | ||
436 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
437 | struct lttng_live_trace *trace; | |
438 | ||
439 | session->new_streams_needed = true; | |
440 | bt_list_for_each_entry(trace, &session->traces, node) { | |
441 | trace->new_metadata_needed = true; | |
442 | } | |
443 | } | |
444 | } | |
445 | ||
446 | static | |
447 | enum bt_notification_iterator_status lttng_live_iterator_next_handle_new_streams_and_metadata( | |
448 | struct lttng_live_component *lttng_live) | |
449 | { | |
450 | enum bt_ctf_lttng_live_iterator_status ret = | |
451 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
452 | unsigned int nr_sessions_opened = 0; | |
453 | struct lttng_live_session *session, *s; | |
454 | ||
455 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
456 | if (session->closed && bt_list_empty(&session->traces)) { | |
457 | lttng_live_destroy_session(session); | |
458 | } | |
459 | } | |
460 | /* | |
461 | * Currently, when there are no sessions, we quit immediately. | |
462 | * We may want to add a component parameter to keep trying until | |
463 | * we get data in the future. | |
464 | * Also, in a remotely distant future, we could add a "new | |
465 | * session" flag to the protocol, which would tell us that we | |
466 | * need to query for new sessions even though we have sessions | |
467 | * currently ongoing. | |
468 | */ | |
469 | if (bt_list_empty(<tng_live->sessions)) { | |
470 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
471 | goto end; | |
472 | } | |
473 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
474 | ret = lttng_live_get_session(lttng_live, session); | |
475 | switch (ret) { | |
476 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
477 | break; | |
478 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
479 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
480 | break; | |
481 | default: | |
482 | goto end; | |
483 | } | |
484 | if (!session->closed) { | |
485 | nr_sessions_opened++; | |
486 | } | |
487 | } | |
488 | end: | |
489 | if (ret == BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK && !nr_sessions_opened) { | |
490 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
491 | } | |
492 | return ret; | |
493 | } | |
494 | ||
495 | static | |
496 | enum bt_ctf_lttng_live_iterator_status emit_inactivity_notification( | |
497 | struct lttng_live_component *lttng_live, | |
498 | struct lttng_live_stream_iterator *lttng_live_stream, | |
499 | struct bt_notification **notification, | |
500 | uint64_t timestamp) | |
501 | { | |
502 | enum bt_ctf_lttng_live_iterator_status ret = | |
503 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
504 | struct lttng_live_trace *trace; | |
505 | struct bt_ctf_clock_class *clock_class = NULL; | |
506 | struct bt_ctf_clock_value *clock_value = NULL; | |
507 | struct bt_notification *notif = NULL; | |
508 | int retval; | |
509 | ||
510 | trace = lttng_live_stream->trace; | |
511 | if (!trace) { | |
512 | goto error; | |
513 | } | |
514 | clock_class = bt_clock_class_priority_map_get_clock_class_by_index(trace->cc_prio_map, 0); | |
515 | if (!clock_class) { | |
516 | goto error; | |
517 | } | |
518 | clock_value = bt_ctf_clock_value_create(clock_class, timestamp); | |
519 | if (!clock_value) { | |
520 | goto error; | |
521 | } | |
522 | notif = bt_notification_inactivity_create(trace->cc_prio_map); | |
523 | if (!notif) { | |
524 | goto error; | |
525 | } | |
526 | retval = bt_notification_inactivity_set_clock_value(notif, clock_value); | |
527 | if (retval) { | |
528 | goto error; | |
529 | } | |
530 | *notification = notif; | |
531 | end: | |
532 | bt_put(clock_value); | |
533 | bt_put(clock_class); | |
534 | return ret; | |
535 | ||
536 | error: | |
537 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
538 | bt_put(notif); | |
539 | goto end; | |
540 | } | |
541 | ||
542 | static | |
543 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( | |
544 | struct lttng_live_component *lttng_live, | |
545 | struct lttng_live_stream_iterator *lttng_live_stream, | |
546 | struct bt_notification **notification) | |
547 | { | |
548 | enum bt_ctf_lttng_live_iterator_status ret = | |
549 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
550 | struct bt_ctf_clock_class *clock_class = NULL; | |
551 | struct bt_ctf_clock_value *clock_value = NULL; | |
552 | ||
553 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
554 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
555 | } | |
556 | ||
557 | if (lttng_live_stream->current_inactivity_timestamp == | |
558 | lttng_live_stream->last_returned_inactivity_timestamp) { | |
559 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; | |
560 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
561 | goto end; | |
562 | } | |
563 | ||
564 | ret = emit_inactivity_notification(lttng_live, lttng_live_stream, notification, | |
565 | (uint64_t) lttng_live_stream->current_inactivity_timestamp); | |
566 | ||
567 | lttng_live_stream->last_returned_inactivity_timestamp = | |
568 | lttng_live_stream->current_inactivity_timestamp; | |
569 | end: | |
570 | bt_put(clock_value); | |
571 | bt_put(clock_class); | |
572 | return ret; | |
573 | } | |
574 | ||
575 | static | |
576 | enum bt_ctf_lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( | |
577 | struct lttng_live_component *lttng_live, | |
578 | struct lttng_live_stream_iterator *lttng_live_stream, | |
579 | struct bt_notification **notification) | |
580 | { | |
581 | enum bt_ctf_lttng_live_iterator_status ret = | |
582 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
583 | enum bt_ctf_notif_iter_status status; | |
584 | struct lttng_live_session *session; | |
585 | ||
586 | bt_list_for_each_entry(session, <tng_live->sessions, node) { | |
587 | struct lttng_live_trace *trace; | |
588 | ||
589 | if (session->new_streams_needed) { | |
590 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
591 | } | |
592 | bt_list_for_each_entry(trace, &session->traces, node) { | |
593 | if (trace->new_metadata_needed) { | |
594 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
595 | } | |
596 | } | |
597 | } | |
598 | ||
599 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
600 | return BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
601 | } | |
602 | if (lttng_live_stream->packet_end_notif_queue) { | |
603 | *notification = lttng_live_stream->packet_end_notif_queue; | |
604 | lttng_live_stream->packet_end_notif_queue = NULL; | |
605 | status = BT_CTF_NOTIF_ITER_STATUS_OK; | |
606 | } else { | |
607 | status = bt_ctf_notif_iter_get_next_notification( | |
608 | lttng_live_stream->notif_iter, | |
609 | lttng_live_stream->trace->cc_prio_map, | |
610 | notification); | |
611 | if (status == BT_CTF_NOTIF_ITER_STATUS_OK) { | |
612 | /* | |
613 | * Consider empty packets as inactivity. | |
614 | */ | |
615 | if (bt_notification_get_type(*notification) == BT_NOTIFICATION_TYPE_PACKET_END) { | |
616 | lttng_live_stream->packet_end_notif_queue = *notification; | |
617 | *notification = NULL; | |
618 | return emit_inactivity_notification(lttng_live, | |
619 | lttng_live_stream, notification, | |
620 | lttng_live_stream->current_packet_end_timestamp); | |
621 | } | |
622 | } | |
623 | } | |
624 | switch (status) { | |
625 | case BT_CTF_NOTIF_ITER_STATUS_EOF: | |
626 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
627 | break; | |
628 | case BT_CTF_NOTIF_ITER_STATUS_OK: | |
629 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
630 | break; | |
631 | case BT_CTF_NOTIF_ITER_STATUS_AGAIN: | |
632 | /* | |
633 | * Continue immediately (end of packet). The next | |
634 | * get_index may return AGAIN to delay the following | |
635 | * attempt. | |
636 | */ | |
637 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
638 | break; | |
639 | case BT_CTF_NOTIF_ITER_STATUS_INVAL: | |
640 | /* No argument provided by the user, so don't return INVAL. */ | |
641 | case BT_CTF_NOTIF_ITER_STATUS_ERROR: | |
642 | default: | |
643 | ret = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
644 | break; | |
645 | } | |
646 | return ret; | |
647 | } | |
648 | ||
649 | /* | |
650 | * helper function: | |
651 | * handle_no_data_streams() | |
652 | * retry: | |
653 | * - for each ACTIVE_NO_DATA stream: | |
654 | * - query relayd for stream data, or quiescence info. | |
655 | * - if need metadata, get metadata, goto retry. | |
656 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
657 | * - if quiescent, move to QUIESCENT streams | |
658 | * - if fetched data, move to ACTIVE_DATA streams | |
659 | * (at this point each stream either has data, or is quiescent) | |
660 | * | |
661 | * | |
662 | * iterator_next: | |
663 | * handle_new_streams_and_metadata() | |
664 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
665 | * - query relayd for metadata | |
666 | * | |
667 | * call handle_active_no_data_streams() | |
668 | * | |
669 | * handle_quiescent_streams() | |
670 | * - if at least one stream is ACTIVE_DATA: | |
671 | * - peek stream event with lowest timestamp -> next_ts | |
672 | * - for each quiescent stream | |
673 | * - if next_ts >= quiescent end | |
674 | * - set state to ACTIVE_NO_DATA | |
675 | * - else | |
676 | * - for each quiescent stream | |
677 | * - set state to ACTIVE_NO_DATA | |
678 | * | |
679 | * call handle_active_no_data_streams() | |
680 | * | |
681 | * handle_active_data_streams() | |
682 | * - if at least one stream is ACTIVE_DATA: | |
683 | * - get stream event with lowest timestamp from heap | |
684 | * - make that stream event the current notification. | |
685 | * - move this stream heap position to its next event | |
686 | * - if we need to fetch data from relayd, move | |
687 | * stream to ACTIVE_NO_DATA. | |
688 | * - return OK | |
689 | * - return AGAIN | |
690 | * | |
691 | * end criterion: ctrl-c on client. If relayd exits or the session | |
692 | * closes on the relay daemon side, we keep on waiting for streams. | |
693 | * Eventually handle --end timestamp (also an end criterion). | |
694 | * | |
695 | * When disconnected from relayd: try to re-connect endlessly. | |
696 | */ | |
697 | static | |
698 | struct bt_notification_iterator_next_return lttng_live_iterator_next_stream( | |
699 | struct bt_private_notification_iterator *iterator, | |
700 | struct lttng_live_stream_iterator *stream_iter) | |
701 | { | |
702 | enum bt_ctf_lttng_live_iterator_status status; | |
703 | struct bt_notification_iterator_next_return next_return; | |
704 | struct lttng_live_component *lttng_live; | |
705 | ||
706 | lttng_live = stream_iter->trace->session->lttng_live; | |
707 | retry: | |
708 | print_stream_state(stream_iter); | |
709 | next_return.notification = NULL; | |
710 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
711 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
712 | goto end; | |
713 | } | |
714 | status = lttng_live_iterator_next_handle_one_no_data_stream( | |
715 | lttng_live, stream_iter); | |
716 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
717 | goto end; | |
718 | } | |
719 | status = lttng_live_iterator_next_handle_one_quiescent_stream( | |
720 | lttng_live, stream_iter, &next_return.notification); | |
721 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
722 | assert(next_return.notification == NULL); | |
723 | goto end; | |
724 | } | |
725 | if (next_return.notification) { | |
726 | goto end; | |
727 | } | |
728 | status = lttng_live_iterator_next_handle_one_active_data_stream(lttng_live, | |
729 | stream_iter, &next_return.notification); | |
730 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
731 | assert(next_return.notification == NULL); | |
732 | } | |
733 | ||
734 | end: | |
735 | switch (status) { | |
736 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
737 | print_dbg("continue"); | |
738 | goto retry; | |
739 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
740 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
741 | print_dbg("again"); | |
742 | break; | |
743 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
744 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
745 | print_dbg("end"); | |
746 | break; | |
747 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
748 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
749 | print_dbg("ok"); | |
750 | break; | |
751 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
752 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
753 | break; | |
754 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
755 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
756 | break; | |
757 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
758 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
759 | break; | |
760 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
761 | default: /* fall-through */ | |
762 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
763 | break; | |
764 | } | |
765 | return next_return; | |
766 | } | |
767 | ||
768 | static | |
769 | struct bt_notification_iterator_next_return lttng_live_iterator_next_no_stream( | |
770 | struct bt_private_notification_iterator *iterator, | |
771 | struct lttng_live_no_stream_iterator *no_stream_iter) | |
772 | { | |
773 | enum bt_ctf_lttng_live_iterator_status status; | |
774 | struct bt_notification_iterator_next_return next_return; | |
775 | struct lttng_live_component *lttng_live; | |
776 | ||
777 | lttng_live = no_stream_iter->lttng_live; | |
778 | retry: | |
779 | lttng_live_force_new_streams_and_metadata(lttng_live); | |
780 | status = lttng_live_iterator_next_handle_new_streams_and_metadata(lttng_live); | |
781 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
782 | goto end; | |
783 | } | |
784 | if (no_stream_iter->port) { | |
785 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
786 | } else { | |
787 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END; | |
788 | } | |
789 | end: | |
790 | switch (status) { | |
791 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
792 | goto retry; | |
793 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
794 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_AGAIN; | |
795 | break; | |
796 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END: | |
797 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_END; | |
798 | break; | |
799 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK: | |
800 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
801 | break; | |
802 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
803 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_INVALID; | |
804 | break; | |
805 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
806 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_NOMEM; | |
807 | break; | |
808 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
809 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_UNSUPPORTED; | |
810 | break; | |
811 | case BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
812 | default: /* fall-through */ | |
813 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
814 | break; | |
815 | } | |
816 | return next_return; | |
817 | } | |
818 | ||
d3eb6e8f | 819 | BT_HIDDEN |
41a2b7ae | 820 | struct bt_notification_iterator_next_return lttng_live_iterator_next( |
890882ef | 821 | struct bt_private_notification_iterator *iterator) |
d3eb6e8f | 822 | { |
7cdc2bab MD |
823 | struct lttng_live_stream_iterator_generic *s = |
824 | bt_private_notification_iterator_get_user_data(iterator); | |
825 | struct bt_notification_iterator_next_return next_return; | |
826 | ||
827 | switch (s->type) { | |
828 | case LIVE_STREAM_TYPE_NO_STREAM: | |
829 | next_return = lttng_live_iterator_next_no_stream(iterator, | |
830 | container_of(s, struct lttng_live_no_stream_iterator, p)); | |
831 | break; | |
832 | case LIVE_STREAM_TYPE_STREAM: | |
833 | next_return = lttng_live_iterator_next_stream(iterator, | |
834 | container_of(s, struct lttng_live_stream_iterator, p)); | |
835 | break; | |
836 | default: | |
837 | next_return.status = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
838 | break; | |
839 | } | |
840 | return next_return; | |
841 | } | |
41a2b7ae | 842 | |
7cdc2bab MD |
843 | BT_HIDDEN |
844 | enum bt_notification_iterator_status lttng_live_iterator_init( | |
845 | struct bt_private_notification_iterator *it, | |
846 | struct bt_private_port *port) | |
847 | { | |
848 | enum bt_notification_iterator_status ret = | |
849 | BT_NOTIFICATION_ITERATOR_STATUS_OK; | |
850 | struct lttng_live_stream_iterator_generic *s; | |
7cdc2bab MD |
851 | |
852 | assert(it); | |
853 | ||
854 | s = bt_private_port_get_user_data(port); | |
855 | assert(s); | |
856 | switch (s->type) { | |
857 | case LIVE_STREAM_TYPE_NO_STREAM: | |
858 | { | |
859 | struct lttng_live_no_stream_iterator *no_stream_iter = | |
860 | container_of(s, struct lttng_live_no_stream_iterator, p); | |
7cdc2bab MD |
861 | ret = bt_private_notification_iterator_set_user_data(it, no_stream_iter); |
862 | if (ret) { | |
863 | goto error; | |
864 | } | |
865 | break; | |
866 | } | |
867 | case LIVE_STREAM_TYPE_STREAM: | |
868 | { | |
869 | struct lttng_live_stream_iterator *stream_iter = | |
870 | container_of(s, struct lttng_live_stream_iterator, p); | |
7cdc2bab MD |
871 | ret = bt_private_notification_iterator_set_user_data(it, stream_iter); |
872 | if (ret) { | |
873 | goto error; | |
874 | } | |
875 | break; | |
876 | } | |
877 | default: | |
878 | ret = BT_NOTIFICATION_ITERATOR_STATUS_ERROR; | |
879 | goto end; | |
880 | } | |
881 | ||
882 | end: | |
41a2b7ae | 883 | return ret; |
7cdc2bab MD |
884 | error: |
885 | if (bt_private_notification_iterator_set_user_data(it, NULL) | |
886 | != BT_NOTIFICATION_ITERATOR_STATUS_OK) { | |
087bc060 | 887 | BT_LOGE("Error setting private data to NULL"); |
7cdc2bab MD |
888 | } |
889 | goto end; | |
890 | } | |
891 | ||
892 | static | |
893 | struct bt_value *lttng_live_query_list_sessions(struct bt_component_class *comp_class, | |
894 | struct bt_value *params) | |
895 | { | |
896 | struct bt_value *url_value = NULL; | |
897 | struct bt_value *results = NULL; | |
898 | const char *url; | |
899 | struct bt_live_viewer_connection *viewer_connection = NULL; | |
900 | enum bt_value_status ret; | |
901 | ||
902 | url_value = bt_value_map_get(params, "url"); | |
903 | if (!url_value || bt_value_is_null(url_value) || !bt_value_is_string(url_value)) { | |
087bc060 | 904 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
905 | goto error; |
906 | } | |
907 | ||
908 | ret = bt_value_string_get(url_value, &url); | |
909 | if (ret != BT_VALUE_STATUS_OK) { | |
087bc060 | 910 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
911 | goto error; |
912 | } | |
913 | ||
914 | viewer_connection = bt_live_viewer_connection_create(url, stderr); | |
915 | if (!viewer_connection) { | |
916 | ret = BT_COMPONENT_STATUS_NOMEM; | |
917 | goto error; | |
918 | } | |
919 | ||
920 | results = bt_live_viewer_connection_list_sessions(viewer_connection); | |
921 | goto end; | |
922 | error: | |
923 | BT_PUT(results); | |
924 | end: | |
925 | if (viewer_connection) { | |
926 | bt_live_viewer_connection_destroy(viewer_connection); | |
927 | } | |
928 | BT_PUT(url_value); | |
929 | return results; | |
930 | } | |
931 | ||
932 | BT_HIDDEN | |
933 | struct bt_value *lttng_live_query(struct bt_component_class *comp_class, | |
934 | const char *object, struct bt_value *params) | |
935 | { | |
936 | if (strcmp(object, "sessions") == 0) { | |
937 | return lttng_live_query_list_sessions(comp_class, | |
938 | params); | |
939 | } | |
087bc060 | 940 | BT_LOGW("Unknown query object `%s`", object); |
7cdc2bab MD |
941 | return NULL; |
942 | } | |
943 | ||
944 | static | |
945 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
946 | { | |
947 | int ret; | |
948 | struct lttng_live_session *session, *s; | |
949 | ||
950 | bt_list_for_each_entry_safe(session, s, <tng_live->sessions, node) { | |
951 | lttng_live_destroy_session(session); | |
952 | } | |
953 | BT_PUT(lttng_live->viewer_connection); | |
954 | if (lttng_live->url) { | |
955 | g_string_free(lttng_live->url, TRUE); | |
956 | } | |
957 | if (lttng_live->no_stream_port) { | |
958 | ret = bt_private_port_remove_from_component(lttng_live->no_stream_port); | |
959 | assert(!ret); | |
960 | BT_PUT(lttng_live->no_stream_port); | |
961 | } | |
962 | if (lttng_live->no_stream_iter) { | |
963 | g_free(lttng_live->no_stream_iter); | |
964 | } | |
965 | g_free(lttng_live); | |
966 | } | |
967 | ||
968 | BT_HIDDEN | |
969 | void lttng_live_component_finalize(struct bt_private_component *component) | |
970 | { | |
971 | void *data = bt_private_component_get_user_data(component); | |
972 | ||
973 | if (!data) { | |
974 | return; | |
975 | } | |
976 | lttng_live_component_destroy_data(data); | |
977 | } | |
978 | ||
979 | static | |
980 | struct lttng_live_component *lttng_live_component_create(struct bt_value *params, | |
981 | struct bt_private_component *private_component) | |
982 | { | |
983 | struct lttng_live_component *lttng_live; | |
984 | struct bt_value *value = NULL; | |
985 | const char *url; | |
986 | enum bt_value_status ret; | |
987 | ||
988 | lttng_live = g_new0(struct lttng_live_component, 1); | |
989 | if (!lttng_live) { | |
990 | goto end; | |
991 | } | |
7cdc2bab MD |
992 | /* TODO: make this an overridable parameter. */ |
993 | lttng_live->max_query_size = MAX_QUERY_SIZE; | |
994 | BT_INIT_LIST_HEAD(<tng_live->sessions); | |
995 | value = bt_value_map_get(params, "url"); | |
996 | if (!value || bt_value_is_null(value) || !bt_value_is_string(value)) { | |
087bc060 | 997 | BT_LOGW("Mandatory \"url\" parameter missing"); |
7cdc2bab MD |
998 | goto error; |
999 | } | |
1000 | ret = bt_value_string_get(value, &url); | |
1001 | if (ret != BT_VALUE_STATUS_OK) { | |
087bc060 | 1002 | BT_LOGW("\"url\" parameter is required to be a string value"); |
7cdc2bab MD |
1003 | goto error; |
1004 | } | |
1005 | lttng_live->url = g_string_new(url); | |
1006 | if (!lttng_live->url) { | |
1007 | goto error; | |
1008 | } | |
1009 | lttng_live->viewer_connection = | |
1010 | bt_live_viewer_connection_create(lttng_live->url->str, | |
1011 | stderr); | |
1012 | if (!lttng_live->viewer_connection) { | |
1013 | ret = BT_COMPONENT_STATUS_NOMEM; | |
1014 | goto error; | |
1015 | } | |
1016 | if (lttng_live_create_viewer_session(lttng_live)) { | |
1017 | ret = BT_COMPONENT_STATUS_ERROR; | |
1018 | goto error; | |
1019 | } | |
1020 | lttng_live->private_component = private_component; | |
1021 | ||
1022 | goto end; | |
1023 | ||
1024 | error: | |
1025 | lttng_live_component_destroy_data(lttng_live); | |
1026 | lttng_live = NULL; | |
1027 | end: | |
1028 | return lttng_live; | |
d3e4dcd8 PP |
1029 | } |
1030 | ||
f3bc2010 | 1031 | BT_HIDDEN |
7cdc2bab MD |
1032 | enum bt_component_status lttng_live_component_init(struct bt_private_component *component, |
1033 | struct bt_value *params, void *init_method_data) | |
f3bc2010 | 1034 | { |
7cdc2bab MD |
1035 | struct lttng_live_component *lttng_live; |
1036 | enum bt_component_status ret = BT_COMPONENT_STATUS_OK; | |
1037 | ||
7cdc2bab MD |
1038 | /* Passes ownership of iter ref to lttng_live_component_create. */ |
1039 | lttng_live = lttng_live_component_create(params, component); | |
1040 | if (!lttng_live) { | |
1041 | ret = BT_COMPONENT_STATUS_NOMEM; | |
1042 | goto end; | |
1043 | } | |
1044 | ||
1045 | lttng_live->no_stream_iter = g_new0(struct lttng_live_no_stream_iterator, 1); | |
1046 | lttng_live->no_stream_iter->p.type = LIVE_STREAM_TYPE_NO_STREAM; | |
1047 | lttng_live->no_stream_iter->lttng_live = lttng_live; | |
1048 | ||
1049 | lttng_live->no_stream_port = | |
1050 | bt_private_component_source_add_output_private_port( | |
1051 | lttng_live->private_component, "no-stream", | |
1052 | lttng_live->no_stream_iter); | |
1053 | lttng_live->no_stream_iter->port = lttng_live->no_stream_port; | |
1054 | ||
1055 | ret = bt_private_component_set_user_data(component, lttng_live); | |
1056 | if (ret != BT_COMPONENT_STATUS_OK) { | |
1057 | goto error; | |
1058 | } | |
1059 | ||
1060 | end: | |
1061 | return ret; | |
1062 | error: | |
1063 | (void) bt_private_component_set_user_data(component, NULL); | |
1064 | lttng_live_component_destroy_data(lttng_live); | |
1065 | return ret; | |
f3bc2010 | 1066 | } |
087bc060 | 1067 | |
d85ef162 MD |
1068 | BT_HIDDEN |
1069 | enum bt_component_status lttng_live_accept_port_connection( | |
1070 | struct bt_private_component *private_component, | |
1071 | struct bt_private_port *self_private_port, | |
1072 | struct bt_port *other_port) | |
1073 | { | |
1074 | struct lttng_live_component *lttng_live = | |
1075 | bt_private_component_get_user_data(private_component); | |
1076 | struct bt_component *other_component; | |
1077 | enum bt_component_status status = BT_COMPONENT_STATUS_OK; | |
1078 | struct bt_port *self_port = bt_port_from_private_port(self_private_port); | |
1079 | ||
1080 | other_component = bt_port_get_component(other_port); | |
1081 | bt_put(other_component); /* weak */ | |
1082 | ||
1083 | if (!lttng_live->downstream_component) { | |
1084 | lttng_live->downstream_component = other_component; | |
1085 | goto end; | |
1086 | } | |
1087 | ||
1088 | /* | |
1089 | * Compare prior component to ensure we are connected to the | |
1090 | * same downstream component as prior ports. | |
1091 | */ | |
1092 | if (lttng_live->downstream_component != other_component) { | |
1093 | BT_LOGW("Cannot connect ctf.lttng-live component port \"%s\" to component \"%s\": already connected to component \"%s\".", | |
1094 | bt_port_get_name(self_port), | |
1095 | bt_component_get_name(other_component), | |
1096 | bt_component_get_name(lttng_live->downstream_component)); | |
1097 | status = BT_COMPONENT_STATUS_REFUSE_PORT_CONNECTION; | |
1098 | goto end; | |
1099 | } | |
1100 | end: | |
1101 | bt_put(self_port); | |
1102 | return status; | |
1103 | } | |
1104 | ||
087bc060 MD |
1105 | static |
1106 | void __attribute__((constructor)) bt_lttng_live_logging_ctor(void) | |
1107 | { | |
1108 | enum bt_logging_level log_level = BT_LOG_NONE; | |
047358f9 | 1109 | const char *log_level_env = getenv(BT_LOGLEVEL_NAME); |
087bc060 MD |
1110 | |
1111 | if (!log_level_env) { | |
1112 | return; | |
1113 | } | |
1114 | ||
1115 | if (strcmp(log_level_env, "VERBOSE") == 0) { | |
1116 | log_level = BT_LOGGING_LEVEL_VERBOSE; | |
1117 | } else if (strcmp(log_level_env, "DEBUG") == 0) { | |
1118 | log_level = BT_LOGGING_LEVEL_DEBUG; | |
1119 | } else if (strcmp(log_level_env, "INFO") == 0) { | |
1120 | log_level = BT_LOGGING_LEVEL_INFO; | |
1121 | } else if (strcmp(log_level_env, "WARN") == 0) { | |
1122 | log_level = BT_LOGGING_LEVEL_WARN; | |
1123 | } else if (strcmp(log_level_env, "ERROR") == 0) { | |
1124 | log_level = BT_LOGGING_LEVEL_ERROR; | |
1125 | } else if (strcmp(log_level_env, "FATAL") == 0) { | |
1126 | log_level = BT_LOGGING_LEVEL_FATAL; | |
d85ef162 MD |
1127 | } else { |
1128 | bt_lttng_live_log_level = BT_LOGGING_LEVEL_FATAL; | |
047358f9 MD |
1129 | BT_LOGF("Incorrect log level specified in %s", |
1130 | BT_LOGLEVEL_NAME); | |
d85ef162 | 1131 | abort(); |
087bc060 MD |
1132 | } |
1133 | ||
1134 | bt_lttng_live_log_level = log_level; | |
1135 | } |