Commit | Line | Data |
---|---|---|
f3bc2010 JG |
1 | /* |
2 | * lttng-live.c | |
3 | * | |
4 | * Babeltrace CTF LTTng-live Client Component | |
5 | * | |
14f28187 | 6 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
f3bc2010 | 7 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
7cdc2bab | 8 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 JG |
9 | * |
10 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
11 | * | |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
25 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
28 | * SOFTWARE. | |
29 | */ | |
30 | ||
2ece7dd0 | 31 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 32 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 33 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE" |
d9c39b0a | 34 | #include "logging/comp-logging.h" |
020bc26f | 35 | |
14f28187 FD |
36 | #include <glib.h> |
37 | #include <inttypes.h> | |
38 | #include <unistd.h> | |
39 | ||
578e048b | 40 | #include "common/assert.h" |
3fadfbc0 | 41 | #include <babeltrace2/babeltrace.h> |
578e048b | 42 | #include "compat/compiler.h" |
3fadfbc0 | 43 | #include <babeltrace2/types.h> |
f3bc2010 | 44 | |
376fc2bd | 45 | #include "plugins/common/muxing/muxing.h" |
80aff5ef | 46 | #include "plugins/common/param-validation/param-validation.h" |
376fc2bd | 47 | |
7cdc2bab MD |
48 | #include "data-stream.h" |
49 | #include "metadata.h" | |
14f28187 | 50 | #include "lttng-live.h" |
7cdc2bab | 51 | |
14f28187 FD |
52 | #define MAX_QUERY_SIZE (256*1024) |
53 | #define URL_PARAM "url" | |
312df793 | 54 | #define INPUTS_PARAM "inputs" |
14f28187 FD |
55 | #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action" |
56 | #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue" | |
57 | #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail" | |
58 | #define SESS_NOT_FOUND_ACTION_END_STR "end" | |
7cdc2bab | 59 | |
2ece7dd0 | 60 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 61 | |
14f28187 FD |
62 | static |
63 | const char *print_live_iterator_status(enum lttng_live_iterator_status status) | |
64 | { | |
65 | switch (status) { | |
66 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
67 | return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE"; | |
68 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
69 | return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN"; | |
70 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
71 | return "LTTNG_LIVE_ITERATOR_STATUS_END"; | |
72 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
73 | return "LTTNG_LIVE_ITERATOR_STATUS_OK"; | |
74 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
75 | return "LTTNG_LIVE_ITERATOR_STATUS_INVAL"; | |
76 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
77 | return "LTTNG_LIVE_ITERATOR_STATUS_ERROR"; | |
78 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
79 | return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM"; | |
80 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
81 | return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED"; | |
82 | default: | |
83 | abort(); | |
84 | } | |
85 | } | |
86 | ||
87 | static | |
88 | const char *print_state(struct lttng_live_stream_iterator *s) | |
7cdc2bab MD |
89 | { |
90 | switch (s->state) { | |
91 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
92 | return "ACTIVE_NO_DATA"; | |
93 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
94 | return "QUIESCENT_NO_DATA"; | |
95 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
96 | return "QUIESCENT"; | |
97 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
98 | return "ACTIVE_DATA"; | |
99 | case LTTNG_LIVE_STREAM_EOF: | |
100 | return "EOF"; | |
101 | default: | |
102 | return "ERROR"; | |
103 | } | |
104 | } | |
7cdc2bab | 105 | |
14f28187 FD |
106 | #define print_stream_state(live_stream_iter) \ |
107 | do { \ | |
2ece7dd0 | 108 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
14f28187 FD |
109 | ", curr_inact_ts %" PRId64, \ |
110 | print_state(live_stream_iter), \ | |
111 | live_stream_iter->last_inactivity_ts, \ | |
112 | live_stream_iter->current_inactivity_ts); \ | |
113 | } while (0); | |
6f79a7cf MD |
114 | |
115 | BT_HIDDEN | |
9b4f9b42 | 116 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 117 | { |
14f28187 | 118 | bool ret; |
6f79a7cf | 119 | |
9b4f9b42 | 120 | if (!msg_iter) { |
14f28187 FD |
121 | ret = false; |
122 | goto end; | |
7cdc2bab | 123 | } |
7cdc2bab | 124 | |
9b4f9b42 PP |
125 | ret = bt_self_message_iterator_is_interrupted( |
126 | msg_iter->self_msg_iter); | |
4bf0e537 | 127 | |
14f28187 FD |
128 | end: |
129 | return ret; | |
7cdc2bab MD |
130 | } |
131 | ||
132 | static | |
133 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
134 | uint64_t trace_id) | |
d3e4dcd8 | 135 | { |
14f28187 FD |
136 | uint64_t trace_idx; |
137 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 138 | |
14f28187 FD |
139 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
140 | struct lttng_live_trace *trace = | |
141 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 142 | if (trace->id == trace_id) { |
14f28187 FD |
143 | ret_trace = trace; |
144 | goto end; | |
7cdc2bab MD |
145 | } |
146 | } | |
14f28187 FD |
147 | |
148 | end: | |
149 | return ret_trace; | |
d3eb6e8f PP |
150 | } |
151 | ||
7cdc2bab | 152 | static |
14f28187 | 153 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 154 | { |
c01594de | 155 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 156 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 157 | |
2ece7dd0 | 158 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 159 | |
14f28187 FD |
160 | BT_ASSERT(trace->stream_iterators); |
161 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 162 | |
14f28187 FD |
163 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
164 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 165 | |
7cdc2bab | 166 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
167 | g_free(trace); |
168 | } | |
169 | ||
170 | static | |
171 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
172 | uint64_t trace_id) | |
173 | { | |
174 | struct lttng_live_trace *trace = NULL; | |
c01594de | 175 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 176 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab MD |
177 | |
178 | trace = g_new0(struct lttng_live_trace, 1); | |
179 | if (!trace) { | |
180 | goto error; | |
181 | } | |
c01594de | 182 | trace->log_level = session->log_level; |
2ece7dd0 | 183 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
184 | trace->session = session; |
185 | trace->id = trace_id; | |
14f28187 FD |
186 | trace->trace_class = NULL; |
187 | trace->trace = NULL; | |
188 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0f1979c3 | 189 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
14f28187 | 190 | BT_ASSERT(trace->stream_iterators); |
7cdc2bab | 191 | trace->new_metadata_needed = true; |
14f28187 FD |
192 | g_ptr_array_add(session->traces, trace); |
193 | ||
2ece7dd0 | 194 | BT_COMP_LOGI("Create trace"); |
7cdc2bab MD |
195 | goto end; |
196 | error: | |
197 | g_free(trace); | |
198 | trace = NULL; | |
199 | end: | |
200 | return trace; | |
201 | } | |
202 | ||
203 | BT_HIDDEN | |
14f28187 FD |
204 | struct lttng_live_trace *lttng_live_borrow_trace( |
205 | struct lttng_live_session *session, uint64_t trace_id) | |
7cdc2bab MD |
206 | { |
207 | struct lttng_live_trace *trace; | |
208 | ||
209 | trace = lttng_live_find_trace(session, trace_id); | |
210 | if (trace) { | |
14f28187 | 211 | goto end; |
7cdc2bab | 212 | } |
7cdc2bab | 213 | |
14f28187 FD |
214 | /* The session is the owner of the newly created trace. */ |
215 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 216 | |
14f28187 FD |
217 | end: |
218 | return trace; | |
7cdc2bab MD |
219 | } |
220 | ||
221 | BT_HIDDEN | |
14f28187 | 222 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
223 | uint64_t session_id, const char *hostname, |
224 | const char *session_name) | |
7cdc2bab MD |
225 | { |
226 | int ret = 0; | |
14f28187 | 227 | struct lttng_live_session *session; |
c01594de | 228 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 229 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 230 | |
14f28187 FD |
231 | session = g_new0(struct lttng_live_session, 1); |
232 | if (!session) { | |
7cdc2bab MD |
233 | goto error; |
234 | } | |
235 | ||
c01594de | 236 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 237 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
238 | session->id = session_id; |
239 | session->traces = g_ptr_array_new_with_free_func( | |
0f1979c3 | 240 | (GDestroyNotify) lttng_live_destroy_trace); |
14f28187 FD |
241 | BT_ASSERT(session->traces); |
242 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
243 | session->new_streams_needed = true; | |
244 | session->hostname = g_string_new(hostname); | |
245 | BT_ASSERT(session->hostname); | |
246 | ||
247 | session->session_name = g_string_new(session_name); | |
248 | BT_ASSERT(session->session_name); | |
7cdc2bab | 249 | |
2ece7dd0 | 250 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
14f28187 FD |
251 | session->id, hostname, session_name); |
252 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); | |
7cdc2bab MD |
253 | goto end; |
254 | error: | |
2ece7dd0 | 255 | BT_COMP_LOGE("Error adding session"); |
14f28187 | 256 | g_free(session); |
7cdc2bab MD |
257 | ret = -1; |
258 | end: | |
259 | return ret; | |
260 | } | |
261 | ||
262 | static | |
263 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
264 | { | |
c01594de | 265 | bt_logging_level log_level; |
2ece7dd0 | 266 | bt_self_component *self_comp; |
14f28187 FD |
267 | |
268 | if (!session) { | |
269 | goto end; | |
270 | } | |
7cdc2bab | 271 | |
c01594de | 272 | log_level = session->log_level; |
2ece7dd0 PP |
273 | self_comp = session->self_comp; |
274 | BT_COMP_LOGD("Destroy lttng live session"); | |
7cdc2bab MD |
275 | if (session->id != -1ULL) { |
276 | if (lttng_live_detach_session(session)) { | |
0757916e FD |
277 | if (!lttng_live_graph_is_canceled( |
278 | session->lttng_live_msg_iter)) { | |
4c66436f | 279 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 280 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
281 | session->id); |
282 | } | |
7cdc2bab MD |
283 | } |
284 | session->id = -1ULL; | |
285 | } | |
14f28187 FD |
286 | |
287 | if (session->traces) { | |
288 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 289 | } |
14f28187 | 290 | |
06994c71 MD |
291 | if (session->hostname) { |
292 | g_string_free(session->hostname, TRUE); | |
293 | } | |
294 | if (session->session_name) { | |
295 | g_string_free(session->session_name, TRUE); | |
296 | } | |
7cdc2bab | 297 | g_free(session); |
14f28187 FD |
298 | |
299 | end: | |
300 | return; | |
7cdc2bab MD |
301 | } |
302 | ||
14f28187 FD |
303 | static |
304 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 305 | { |
14f28187 FD |
306 | if (!lttng_live_msg_iter) { |
307 | goto end; | |
7cdc2bab | 308 | } |
7cdc2bab | 309 | |
14f28187 FD |
310 | if (lttng_live_msg_iter->sessions) { |
311 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 312 | } |
14f28187 FD |
313 | |
314 | BT_OBJECT_PUT_REF_AND_RESET(lttng_live_msg_iter->viewer_connection); | |
315 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); | |
316 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
317 | ||
318 | /* All stream iterators must be destroyed at this point. */ | |
319 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
320 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
321 | ||
322 | g_free(lttng_live_msg_iter); | |
323 | ||
324 | end: | |
325 | return; | |
326 | } | |
327 | ||
328 | BT_HIDDEN | |
329 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
330 | { | |
331 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
332 | ||
333 | BT_ASSERT(self_msg_iter); | |
334 | ||
335 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
336 | BT_ASSERT(lttng_live_msg_iter); | |
337 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
338 | } |
339 | ||
340 | static | |
14f28187 | 341 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
342 | struct lttng_live_stream_iterator *lttng_live_stream) |
343 | { | |
c01594de | 344 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 345 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 346 | |
7cdc2bab MD |
347 | switch (lttng_live_stream->state) { |
348 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
349 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
350 | break; | |
351 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
352 | /* Invalid state. */ | |
2ece7dd0 | 353 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
087bc060 | 354 | abort(); |
7cdc2bab MD |
355 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
356 | /* Invalid state. */ | |
2ece7dd0 | 357 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
087bc060 | 358 | abort(); |
7cdc2bab MD |
359 | case LTTNG_LIVE_STREAM_EOF: |
360 | break; | |
361 | } | |
14f28187 | 362 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
363 | } |
364 | ||
365 | /* | |
366 | * For active no data stream, fetch next data. It can be either: | |
367 | * - quiescent: need to put it in the prio heap at quiescent end | |
368 | * timestamp, | |
369 | * - have data: need to wire up first event into the prio heap, | |
370 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
371 | * return EOF. | |
372 | */ | |
373 | static | |
14f28187 FD |
374 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
375 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
376 | struct lttng_live_stream_iterator *lttng_live_stream) |
377 | { | |
c01594de | 378 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 379 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 | 380 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 381 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
0f1979c3 | 382 | struct packet_index index; |
7cdc2bab MD |
383 | |
384 | if (lttng_live_stream->trace->new_metadata_needed) { | |
14f28187 | 385 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
386 | goto end; |
387 | } | |
388 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
14f28187 | 389 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
390 | goto end; |
391 | } | |
14f28187 FD |
392 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
393 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
394 | goto end; |
395 | } | |
14f28187 FD |
396 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
397 | &index); | |
398 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
7cdc2bab MD |
399 | goto end; |
400 | } | |
98b15851 | 401 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 402 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 FD |
403 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
404 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
405 | ||
406 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
407 | last_inact_ts == curr_inact_ts) { | |
408 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
7cdc2bab MD |
409 | print_stream_state(lttng_live_stream); |
410 | } else { | |
14f28187 | 411 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
412 | } |
413 | goto end; | |
414 | } | |
415 | lttng_live_stream->base_offset = index.offset; | |
416 | lttng_live_stream->offset = index.offset; | |
417 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
418 | end: | |
14f28187 FD |
419 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
420 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
421 | } |
422 | return ret; | |
423 | } | |
424 | ||
425 | /* | |
14f28187 FD |
426 | * Creation of the message requires the ctf trace class to be created |
427 | * beforehand, but the live protocol gives us all streams (including metadata) | |
428 | * at once. So we split it in three steps: getting streams, getting metadata | |
429 | * (which creates the ctf trace class), and then creating the per-stream | |
430 | * messages. | |
7cdc2bab MD |
431 | */ |
432 | static | |
14f28187 FD |
433 | enum lttng_live_iterator_status lttng_live_get_session( |
434 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
435 | struct lttng_live_session *session) |
436 | { | |
14f28187 FD |
437 | enum lttng_live_iterator_status status; |
438 | uint64_t trace_idx; | |
439 | int ret = 0; | |
7cdc2bab | 440 | |
14f28187 FD |
441 | if (!session->attached) { |
442 | ret = lttng_live_attach_session(session); | |
443 | if (ret) { | |
0757916e | 444 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
14f28187 FD |
445 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
446 | } else { | |
447 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
448 | } | |
449 | goto end; | |
4c66436f | 450 | } |
7cdc2bab | 451 | } |
14f28187 | 452 | |
7cdc2bab | 453 | status = lttng_live_get_new_streams(session); |
14f28187 FD |
454 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
455 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
456 | goto end; | |
7cdc2bab | 457 | } |
14f28187 FD |
458 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
459 | struct lttng_live_trace *trace = | |
460 | g_ptr_array_index(session->traces, trace_idx); | |
461 | ||
7cdc2bab | 462 | status = lttng_live_metadata_update(trace); |
14f28187 FD |
463 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
464 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
465 | goto end; | |
7cdc2bab MD |
466 | } |
467 | } | |
14f28187 FD |
468 | status = lttng_live_lazy_msg_init(session); |
469 | ||
470 | end: | |
471 | return status; | |
7cdc2bab MD |
472 | } |
473 | ||
474 | BT_HIDDEN | |
14f28187 | 475 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 476 | { |
14f28187 | 477 | uint64_t session_idx; |
7cdc2bab | 478 | |
14f28187 FD |
479 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
480 | session_idx++) { | |
481 | struct lttng_live_session *session = | |
482 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
483 | session->new_streams_needed = true; |
484 | } | |
485 | } | |
486 | ||
487 | static | |
14f28187 | 488 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 489 | { |
14f28187 | 490 | uint64_t session_idx, trace_idx; |
7cdc2bab | 491 | |
14f28187 FD |
492 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
493 | session_idx++) { | |
494 | struct lttng_live_session *session = | |
495 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 496 | session->new_streams_needed = true; |
14f28187 FD |
497 | for (trace_idx = 0; trace_idx < session->traces->len; |
498 | trace_idx++) { | |
499 | struct lttng_live_trace *trace = | |
500 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
501 | trace->new_metadata_needed = true; |
502 | } | |
503 | } | |
504 | } | |
505 | ||
506 | static | |
14f28187 FD |
507 | enum lttng_live_iterator_status |
508 | lttng_live_iterator_handle_new_streams_and_metadata( | |
509 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 510 | { |
0f1979c3 | 511 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
14f28187 FD |
512 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
513 | struct lttng_live_session *session; | |
514 | enum session_not_found_action sess_not_found_act = | |
515 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
516 | ||
7cdc2bab | 517 | /* |
14f28187 | 518 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
519 | * session" flag to the protocol, which would tell us that we |
520 | * need to query for new sessions even though we have sessions | |
521 | * currently ongoing. | |
522 | */ | |
14f28187 FD |
523 | if (lttng_live_msg_iter->sessions->len == 0) { |
524 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
525 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
526 | goto end; | |
527 | } else { | |
528 | /* | |
529 | * Retry to create a viewer session for the requested | |
530 | * session name. | |
531 | */ | |
532 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
533 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
534 | goto end; | |
535 | } | |
536 | } | |
7cdc2bab | 537 | } |
14f28187 FD |
538 | |
539 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
540 | session_idx++) { | |
541 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
542 | session_idx); | |
543 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 544 | switch (ret) { |
14f28187 | 545 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 546 | break; |
14f28187 FD |
547 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
548 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
549 | break; |
550 | default: | |
551 | goto end; | |
552 | } | |
553 | if (!session->closed) { | |
554 | nr_sessions_opened++; | |
555 | } | |
556 | } | |
557 | end: | |
14f28187 FD |
558 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
559 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
560 | nr_sessions_opened == 0) { | |
561 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
562 | } |
563 | return ret; | |
564 | } | |
565 | ||
566 | static | |
14f28187 FD |
567 | enum lttng_live_iterator_status emit_inactivity_message( |
568 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
569 | struct lttng_live_stream_iterator *stream_iter, | |
570 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 571 | { |
0f1979c3 | 572 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
14f28187 | 573 | bt_message *msg = NULL; |
7cdc2bab | 574 | |
14f28187 FD |
575 | BT_ASSERT(stream_iter->trace->clock_class); |
576 | ||
577 | msg = bt_message_message_iterator_inactivity_create( | |
0f1979c3 FD |
578 | lttng_live_msg_iter->self_msg_iter, |
579 | stream_iter->trace->clock_class, timestamp); | |
d6e69534 | 580 | if (!msg) { |
7cdc2bab MD |
581 | goto error; |
582 | } | |
14f28187 | 583 | |
d6e69534 | 584 | *message = msg; |
7cdc2bab | 585 | end: |
7cdc2bab MD |
586 | return ret; |
587 | ||
588 | error: | |
14f28187 | 589 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 590 | bt_message_put_ref(msg); |
7cdc2bab MD |
591 | goto end; |
592 | } | |
593 | ||
594 | static | |
14f28187 FD |
595 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
596 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 597 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 598 | bt_message **message) |
7cdc2bab | 599 | { |
0f1979c3 | 600 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
601 | |
602 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 603 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
604 | } |
605 | ||
14f28187 FD |
606 | if (lttng_live_stream->current_inactivity_ts == |
607 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 608 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
14f28187 FD |
609 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
610 | goto end; | |
611 | } | |
612 | ||
613 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0f1979c3 | 614 | message, lttng_live_stream->current_inactivity_ts); |
14f28187 FD |
615 | |
616 | lttng_live_stream->last_inactivity_ts = | |
0f1979c3 | 617 | lttng_live_stream->current_inactivity_ts; |
14f28187 FD |
618 | end: |
619 | return ret; | |
620 | } | |
621 | ||
622 | static | |
623 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
624 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
625 | const bt_message *msg, int64_t last_msg_ts_ns, | |
626 | int64_t *ts_ns) | |
627 | { | |
628 | const bt_clock_class *clock_class = NULL; | |
629 | const bt_clock_snapshot *clock_snapshot = NULL; | |
630 | int ret = 0; | |
c01594de | 631 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 632 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 633 | |
98b15851 PP |
634 | BT_ASSERT_DBG(msg); |
635 | BT_ASSERT_DBG(ts_ns); | |
14f28187 | 636 | |
2ece7dd0 | 637 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
638 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
639 | last_msg_ts_ns); | |
640 | ||
641 | switch (bt_message_get_type(msg)) { | |
642 | case BT_MESSAGE_TYPE_EVENT: | |
0f1979c3 | 643 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
14f28187 | 644 | msg); |
98b15851 | 645 | BT_ASSERT_DBG(clock_class); |
14f28187 | 646 | |
0cbc2c33 PP |
647 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
648 | msg); | |
14f28187 FD |
649 | break; |
650 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0f1979c3 | 651 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
652 | msg); |
653 | BT_ASSERT(clock_class); | |
654 | ||
0cbc2c33 PP |
655 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
656 | msg); | |
14f28187 FD |
657 | break; |
658 | case BT_MESSAGE_TYPE_PACKET_END: | |
0f1979c3 | 659 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
660 | msg); |
661 | BT_ASSERT(clock_class); | |
662 | ||
0cbc2c33 PP |
663 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
664 | msg); | |
14f28187 FD |
665 | break; |
666 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0f1979c3 | 667 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
668 | msg); |
669 | BT_ASSERT(clock_class); | |
670 | ||
9b24b6aa | 671 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 672 | msg); |
14f28187 FD |
673 | break; |
674 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0f1979c3 | 675 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
676 | msg); |
677 | BT_ASSERT(clock_class); | |
678 | ||
9b24b6aa | 679 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 680 | msg); |
14f28187 | 681 | break; |
14f28187 | 682 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0f1979c3 FD |
683 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
684 | msg); | |
14f28187 FD |
685 | break; |
686 | default: | |
687 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 688 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 689 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
690 | goto end; |
691 | } | |
692 | ||
14f28187 | 693 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
98b15851 | 694 | BT_ASSERT_DBG(clock_class); |
14f28187 FD |
695 | |
696 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
697 | if (ret) { | |
2ece7dd0 | 698 | BT_COMP_LOGE("Cannot get nanoseconds from Epoch of clock snapshot: " |
14f28187 FD |
699 | "clock-snapshot-addr=%p", clock_snapshot); |
700 | goto error; | |
701 | } | |
702 | ||
703 | goto end; | |
704 | ||
14f28187 FD |
705 | error: |
706 | ret = -1; | |
7cdc2bab | 707 | |
7cdc2bab | 708 | end: |
14f28187 | 709 | if (ret == 0) { |
2ece7dd0 | 710 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
711 | "iter-data-addr=%p, msg-addr=%p, " |
712 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
713 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
714 | } | |
715 | ||
7cdc2bab MD |
716 | return ret; |
717 | } | |
718 | ||
719 | static | |
14f28187 FD |
720 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
721 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 722 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 723 | bt_message **message) |
7cdc2bab | 724 | { |
14f28187 | 725 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
c01594de | 726 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 727 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 FD |
728 | enum bt_msg_iter_status status; |
729 | uint64_t session_idx, trace_idx; | |
7cdc2bab | 730 | |
14f28187 FD |
731 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
732 | session_idx++) { | |
733 | struct lttng_live_session *session = | |
734 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
735 | |
736 | if (session->new_streams_needed) { | |
14f28187 FD |
737 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
738 | goto end; | |
7cdc2bab | 739 | } |
14f28187 FD |
740 | for (trace_idx = 0; trace_idx < session->traces->len; |
741 | trace_idx++) { | |
742 | struct lttng_live_trace *trace = | |
743 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 744 | if (trace->new_metadata_needed) { |
14f28187 FD |
745 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
746 | goto end; | |
7cdc2bab MD |
747 | } |
748 | } | |
749 | } | |
750 | ||
751 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 FD |
752 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
753 | goto end; | |
7cdc2bab | 754 | } |
14f28187 FD |
755 | |
756 | status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter, | |
757 | lttng_live_msg_iter->self_msg_iter, message); | |
7cdc2bab | 758 | switch (status) { |
d6e69534 | 759 | case BT_MSG_ITER_STATUS_EOF: |
14f28187 | 760 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 761 | break; |
d6e69534 | 762 | case BT_MSG_ITER_STATUS_OK: |
14f28187 | 763 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 764 | break; |
d6e69534 | 765 | case BT_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
766 | /* |
767 | * Continue immediately (end of packet). The next | |
768 | * get_index may return AGAIN to delay the following | |
769 | * attempt. | |
770 | */ | |
14f28187 | 771 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 772 | break; |
d6e69534 | 773 | case BT_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 774 | /* No argument provided by the user, so don't return INVAL. */ |
d6e69534 | 775 | case BT_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 776 | default: |
14f28187 | 777 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
2ece7dd0 | 778 | BT_COMP_LOGW("CTF msg iterator return an error or failed msg_iter=%p", |
14f28187 | 779 | lttng_live_stream->msg_iter); |
7cdc2bab MD |
780 | break; |
781 | } | |
14f28187 FD |
782 | |
783 | end: | |
7cdc2bab MD |
784 | return ret; |
785 | } | |
786 | ||
4a39caef FD |
787 | static |
788 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
789 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
790 | struct lttng_live_stream_iterator *stream_iter, | |
791 | bt_message **curr_msg) | |
792 | { | |
793 | enum lttng_live_iterator_status live_status = | |
794 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
795 | /* | |
796 | * The viewer has hung up on us so we are closing the stream. The | |
797 | * `bt_msg_iter` should simply realize that it needs to close the | |
798 | * stream properly by emitting the necessary stream end message. | |
799 | */ | |
0f1979c3 FD |
800 | enum bt_msg_iter_status status = bt_msg_iter_get_next_message( |
801 | stream_iter->msg_iter, lttng_live_msg_iter->self_msg_iter, | |
802 | curr_msg); | |
4a39caef FD |
803 | |
804 | if (status == BT_MSG_ITER_STATUS_ERROR) { | |
805 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
806 | goto end; | |
807 | } | |
808 | ||
809 | BT_ASSERT(status == BT_MSG_ITER_STATUS_OK); | |
810 | ||
811 | end: | |
812 | return live_status; | |
813 | } | |
814 | ||
7cdc2bab MD |
815 | /* |
816 | * helper function: | |
817 | * handle_no_data_streams() | |
818 | * retry: | |
819 | * - for each ACTIVE_NO_DATA stream: | |
820 | * - query relayd for stream data, or quiescence info. | |
821 | * - if need metadata, get metadata, goto retry. | |
822 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
823 | * - if quiescent, move to QUIESCENT streams | |
824 | * - if fetched data, move to ACTIVE_DATA streams | |
825 | * (at this point each stream either has data, or is quiescent) | |
826 | * | |
827 | * | |
828 | * iterator_next: | |
829 | * handle_new_streams_and_metadata() | |
830 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
831 | * - query relayd for metadata | |
832 | * | |
833 | * call handle_active_no_data_streams() | |
834 | * | |
835 | * handle_quiescent_streams() | |
836 | * - if at least one stream is ACTIVE_DATA: | |
837 | * - peek stream event with lowest timestamp -> next_ts | |
838 | * - for each quiescent stream | |
839 | * - if next_ts >= quiescent end | |
840 | * - set state to ACTIVE_NO_DATA | |
841 | * - else | |
842 | * - for each quiescent stream | |
843 | * - set state to ACTIVE_NO_DATA | |
844 | * | |
845 | * call handle_active_no_data_streams() | |
846 | * | |
847 | * handle_active_data_streams() | |
848 | * - if at least one stream is ACTIVE_DATA: | |
849 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 850 | * - make that stream event the current message. |
7cdc2bab MD |
851 | * - move this stream heap position to its next event |
852 | * - if we need to fetch data from relayd, move | |
853 | * stream to ACTIVE_NO_DATA. | |
854 | * - return OK | |
855 | * - return AGAIN | |
856 | * | |
857 | * end criterion: ctrl-c on client. If relayd exits or the session | |
858 | * closes on the relay daemon side, we keep on waiting for streams. | |
859 | * Eventually handle --end timestamp (also an end criterion). | |
860 | * | |
861 | * When disconnected from relayd: try to re-connect endlessly. | |
862 | */ | |
863 | static | |
a31f4d8b | 864 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
865 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
866 | struct lttng_live_stream_iterator *stream_iter, | |
867 | bt_message **curr_msg) | |
7cdc2bab | 868 | { |
c01594de | 869 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 870 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 871 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 872 | |
4a39caef FD |
873 | if (stream_iter->has_stream_hung_up) { |
874 | /* | |
875 | * The stream has hung up and the stream was properly closed | |
876 | * during the last call to the current function. Return _END | |
877 | * status now so that this stream iterator is removed for the | |
878 | * stream iterator list. | |
879 | */ | |
880 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
881 | goto end; | |
882 | } | |
883 | ||
7cdc2bab MD |
884 | retry: |
885 | print_stream_state(stream_iter); | |
14f28187 | 886 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0f1979c3 | 887 | lttng_live_msg_iter); |
14f28187 | 888 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
889 | goto end; |
890 | } | |
14f28187 | 891 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0f1979c3 | 892 | lttng_live_msg_iter, stream_iter); |
4a39caef | 893 | |
14f28187 | 894 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
895 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
896 | /* | |
897 | * We overwrite `live_status` since `curr_msg` is | |
898 | * likely set to a valid message in this function. | |
899 | */ | |
900 | live_status = lttng_live_iterator_close_stream( | |
901 | lttng_live_msg_iter, stream_iter, curr_msg); | |
902 | } | |
7cdc2bab MD |
903 | goto end; |
904 | } | |
14f28187 | 905 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0f1979c3 | 906 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 907 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 908 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
909 | goto end; |
910 | } | |
14f28187 | 911 | if (*curr_msg) { |
7cdc2bab MD |
912 | goto end; |
913 | } | |
14f28187 | 914 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0f1979c3 | 915 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 916 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 917 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
918 | } |
919 | ||
920 | end: | |
14f28187 | 921 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 922 | goto retry; |
7cdc2bab | 923 | } |
14f28187 FD |
924 | |
925 | return live_status; | |
7cdc2bab MD |
926 | } |
927 | ||
928 | static | |
14f28187 FD |
929 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
930 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
931 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 932 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 933 | { |
a31f4d8b | 934 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0f1979c3 FD |
935 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
936 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 937 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 938 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 939 | uint64_t stream_iter_idx; |
7cdc2bab | 940 | |
98b15851 PP |
941 | BT_ASSERT_DBG(live_trace); |
942 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
14f28187 FD |
943 | /* |
944 | * Update the current message of every stream iterators of this trace. | |
945 | * The current msg of every stream must have a timestamp equal or | |
946 | * larger than the last message returned by this iterator. We must | |
947 | * ensure monotonicity. | |
948 | */ | |
949 | stream_iter_idx = 0; | |
950 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
951 | bool stream_iter_is_ended = false; | |
952 | struct lttng_live_stream_iterator *stream_iter = | |
953 | g_ptr_array_index(live_trace->stream_iterators, | |
0f1979c3 | 954 | stream_iter_idx); |
14f28187 FD |
955 | |
956 | /* | |
957 | * Find if there is are now current message for this stream | |
958 | * iterator get it. | |
959 | */ | |
960 | while (!stream_iter->current_msg) { | |
961 | bt_message *msg = NULL; | |
962 | int64_t curr_msg_ts_ns = INT64_MAX; | |
a31f4d8b | 963 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0f1979c3 | 964 | lttng_live_msg_iter, stream_iter, &msg); |
14f28187 | 965 | |
2ece7dd0 | 966 | BT_COMP_LOGD("live stream iterator returned status :%s", |
0f1979c3 | 967 | print_live_iterator_status(stream_iter_status)); |
14f28187 FD |
968 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
969 | stream_iter_is_ended = true; | |
970 | break; | |
971 | } | |
972 | ||
973 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
974 | goto end; | |
975 | } | |
976 | ||
98b15851 | 977 | BT_ASSERT_DBG(msg); |
14f28187 FD |
978 | |
979 | /* | |
980 | * Get the timestamp in nanoseconds from origin of this | |
981 | * messsage. | |
982 | */ | |
983 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
984 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
985 | &curr_msg_ts_ns); | |
986 | ||
987 | /* | |
988 | * Check if the message of the current live stream | |
989 | * iterator occured at the exact same time or after the | |
990 | * last message returned by this component's message | |
991 | * iterator. If not, we return an error. | |
992 | */ | |
993 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
994 | stream_iter->current_msg = msg; | |
995 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
996 | } else { | |
997 | /* | |
998 | * We received a message in the past. To ensure | |
999 | * monotonicity, we can't send it forward. | |
1000 | */ | |
2ece7dd0 | 1001 | BT_COMP_LOGE("Message's timestamp is less than " |
14f28187 FD |
1002 | "lttng-live's message iterator's last " |
1003 | "returned timestamp: " | |
1004 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1005 | "last-msg-ts=%" PRId64, | |
1006 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1007 | lttng_live_msg_iter->last_msg_ts_ns); | |
1008 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1009 | goto end; | |
1010 | } | |
1011 | } | |
1012 | ||
98b15851 | 1013 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1014 | |
1015 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1016 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1017 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1018 | /* |
1019 | * Update the current best candidate message | |
1020 | * for the stream iterator of this live trace | |
1021 | * to be forwarded downstream. | |
1022 | */ | |
a31f4d8b FD |
1023 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1024 | youngest_candidate_stream_iter = stream_iter; | |
1025 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1026 | /* |
1027 | * Order the messages in an arbitrary but | |
1028 | * deterministic way. | |
1029 | */ | |
98b15851 | 1030 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1031 | int ret = common_muxing_compare_messages( |
1032 | stream_iter->current_msg, | |
a31f4d8b | 1033 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1034 | if (ret < 0) { |
1035 | /* | |
a31f4d8b | 1036 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1037 | * should go first. Update the next |
1038 | * iterator and the current timestamp. | |
1039 | */ | |
a31f4d8b FD |
1040 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1041 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1042 | } else if (ret == 0) { |
1043 | /* | |
1044 | * Unable to pick which one should go | |
1045 | * first. | |
1046 | */ | |
1047 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1048 | "stream-iter-addr=%p" | |
1049 | "stream-iter-addr=%p", | |
1050 | stream_iter, | |
a31f4d8b | 1051 | youngest_candidate_stream_iter); |
07afb6bc FD |
1052 | } |
1053 | } | |
14f28187 | 1054 | |
07afb6bc FD |
1055 | stream_iter_idx++; |
1056 | } else { | |
14f28187 | 1057 | /* |
fba9b58e JG |
1058 | * The live stream iterator has ended. That |
1059 | * iterator is removed from the array, but | |
1060 | * there is no need to increment | |
1061 | * stream_iter_idx as | |
1062 | * g_ptr_array_remove_index_fast replaces the | |
1063 | * removed element with the array's last | |
1064 | * element. | |
14f28187 | 1065 | */ |
fba9b58e JG |
1066 | g_ptr_array_remove_index_fast( |
1067 | live_trace->stream_iterators, | |
14f28187 | 1068 | stream_iter_idx); |
14f28187 FD |
1069 | } |
1070 | } | |
1071 | ||
a31f4d8b FD |
1072 | if (youngest_candidate_stream_iter) { |
1073 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1074 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1075 | } else { | |
1076 | /* | |
1077 | * The only case where we don't have a candidate for this trace | |
1078 | * is if we reached the end of all the iterators. | |
1079 | */ | |
1080 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1081 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1082 | } | |
1083 | ||
1084 | end: | |
1085 | return stream_iter_status; | |
1086 | } | |
1087 | ||
1088 | static | |
1089 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1090 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1091 | struct lttng_live_session *session, | |
a31f4d8b | 1092 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1093 | { |
07afb6bc FD |
1094 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1095 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1096 | enum lttng_live_iterator_status stream_iter_status; |
1097 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1098 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1099 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 FD |
1100 | |
1101 | /* | |
1102 | * Make sure we are attached to the session and look for new streams | |
1103 | * and metadata. | |
1104 | */ | |
1105 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1106 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1107 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1108 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1109 | goto end; |
1110 | } | |
14f28187 | 1111 | |
98b15851 | 1112 | BT_ASSERT_DBG(session->traces); |
14f28187 | 1113 | |
14f28187 FD |
1114 | while (trace_idx < session->traces->len) { |
1115 | bool trace_is_ended = false; | |
1116 | struct lttng_live_stream_iterator *stream_iter; | |
1117 | struct lttng_live_trace *trace = | |
1118 | g_ptr_array_index(session->traces, trace_idx); | |
1119 | ||
1120 | stream_iter_status = next_stream_iterator_for_trace( | |
1121 | lttng_live_msg_iter, trace, &stream_iter); | |
1122 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1123 | /* | |
1124 | * All the live stream iterators for this trace are | |
1125 | * ENDed. Remove the trace from this session. | |
1126 | */ | |
1127 | trace_is_ended = true; | |
1128 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1129 | goto end; | |
1130 | } | |
1131 | ||
1132 | if (!trace_is_ended) { | |
98b15851 | 1133 | BT_ASSERT_DBG(stream_iter); |
14f28187 | 1134 | |
a31f4d8b FD |
1135 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1136 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1137 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1138 | youngest_candidate_stream_iter = stream_iter; | |
1139 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1140 | /* |
1141 | * Order the messages in an arbitrary but | |
1142 | * deterministic way. | |
1143 | */ | |
1144 | int ret = common_muxing_compare_messages( | |
1145 | stream_iter->current_msg, | |
a31f4d8b | 1146 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1147 | if (ret < 0) { |
1148 | /* | |
a31f4d8b | 1149 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1150 | * should go first. Update the next iterator |
1151 | * and the current timestamp. | |
1152 | */ | |
a31f4d8b FD |
1153 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1154 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1155 | } else if (ret == 0) { |
1156 | /* Unable to pick which one should go first. */ | |
1157 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1158 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1159 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1160 | } |
14f28187 FD |
1161 | } |
1162 | trace_idx++; | |
1163 | } else { | |
ba90bce7 JG |
1164 | /* |
1165 | * trace_idx is not incremented since | |
1166 | * g_ptr_array_remove_index_fast replaces the | |
1167 | * element at trace_idx with the array's last element. | |
1168 | */ | |
1169 | g_ptr_array_remove_index_fast(session->traces, | |
1170 | trace_idx); | |
14f28187 FD |
1171 | } |
1172 | } | |
a31f4d8b FD |
1173 | if (youngest_candidate_stream_iter) { |
1174 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1175 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1176 | } else { |
14f28187 FD |
1177 | /* |
1178 | * The only cases where we don't have a candidate for this | |
1179 | * trace is: | |
1180 | * 1. if we reached the end of all the iterators of all the | |
1181 | * traces of this session, | |
1182 | * 2. if we never had live stream iterator in the first place. | |
1183 | * | |
1184 | * In either cases, we return END. | |
1185 | */ | |
1186 | BT_ASSERT(session->traces->len == 0); | |
1187 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1188 | } |
1189 | end: | |
14f28187 FD |
1190 | return stream_iter_status; |
1191 | } | |
1192 | ||
1193 | static inline | |
1194 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1195 | { | |
1196 | uint64_t i; | |
1197 | ||
1198 | for (i = 0; i < count; i++) { | |
1199 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1200 | } |
7cdc2bab MD |
1201 | } |
1202 | ||
d3eb6e8f | 1203 | BT_HIDDEN |
d24d5663 | 1204 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1205 | bt_self_message_iterator *self_msg_it, |
1206 | bt_message_array_const msgs, uint64_t capacity, | |
1207 | uint64_t *count) | |
d3eb6e8f | 1208 | { |
d24d5663 | 1209 | bt_component_class_message_iterator_next_method_status status; |
14f28187 FD |
1210 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1211 | bt_self_message_iterator_get_data(self_msg_it); | |
1212 | struct lttng_live_component *lttng_live = | |
1213 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1214 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1215 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1216 | enum lttng_live_iterator_status stream_iter_status; |
1217 | uint64_t session_idx; | |
1218 | ||
1219 | *count = 0; | |
1220 | ||
98b15851 | 1221 | BT_ASSERT_DBG(lttng_live_msg_iter); |
14f28187 FD |
1222 | |
1223 | /* | |
1224 | * Clear all the invalid message reference that might be left over in | |
1225 | * the output array. | |
1226 | */ | |
1227 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1228 | ||
1229 | /* | |
1230 | * If no session are exposed on the relay found at the url provided by | |
1231 | * the user, session count will be 0. In this case, we return status | |
1232 | * end to return gracefully. | |
1233 | */ | |
1234 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1235 | if (lttng_live->params.sess_not_found_act != | |
1236 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
d24d5663 | 1237 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
14f28187 FD |
1238 | goto no_session; |
1239 | } else { | |
1240 | /* | |
1241 | * The are no more active session for this session | |
1242 | * name. Retry to create a viewer session for the | |
1243 | * requested session name. | |
1244 | */ | |
1245 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
d24d5663 | 1246 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1247 | goto no_session; |
1248 | } | |
1249 | } | |
1250 | } | |
1251 | ||
1252 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1253 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * Here the muxing of message is done. | |
1258 | * | |
1259 | * We need to iterate over all the streams of all the traces of all the | |
1260 | * viewer sessions in order to get the message with the smallest | |
1261 | * timestamp. In this case, a session is a viewer session and there is | |
1262 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1263 | * kernel). Each viewer session can have multiple traces, for example, | |
1264 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1265 | * | |
1266 | * We iterate over the streams of each traces to update and see what is | |
1267 | * their next message's timestamp. From those timestamps, we select the | |
1268 | * message with the smallest timestamp as the best candidate message | |
1269 | * for that trace and do the same thing across all the sessions. | |
1270 | * | |
1271 | * We then compare the timestamp of best candidate message of all the | |
1272 | * sessions to pick the message with the smallest timestamp and we | |
1273 | * return it. | |
1274 | */ | |
1275 | while (*count < capacity) { | |
a31f4d8b FD |
1276 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1277 | *candidate_stream_iter = NULL; | |
1278 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 | 1279 | |
98b15851 | 1280 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
14f28187 | 1281 | session_idx = 0; |
14f28187 FD |
1282 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1283 | struct lttng_live_session *session = | |
1284 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1285 | session_idx); | |
1286 | ||
1287 | /* Find the best candidate message to send downstream. */ | |
1288 | stream_iter_status = next_stream_iterator_for_session( | |
1289 | lttng_live_msg_iter, session, | |
1290 | &candidate_stream_iter); | |
1291 | ||
1292 | /* If we receive an END status, it means that either: | |
1293 | * - Those traces never had active streams (UST with no | |
1294 | * data produced yet), | |
1295 | * - All live stream iterators have ENDed.*/ | |
1296 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1297 | if (session->closed && session->traces->len == 0) { | |
1298 | /* | |
7d632b96 JG |
1299 | * Remove the session from the list. |
1300 | * session_idx is not modified since | |
1301 | * g_ptr_array_remove_index_fast | |
1302 | * replaces the the removed element with | |
1303 | * the array's last element. | |
14f28187 FD |
1304 | */ |
1305 | g_ptr_array_remove_index_fast( | |
1306 | lttng_live_msg_iter->sessions, | |
1307 | session_idx); | |
14f28187 FD |
1308 | } else { |
1309 | session_idx++; | |
1310 | } | |
1311 | continue; | |
1312 | } | |
1313 | ||
1314 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1315 | goto end; | |
1316 | } | |
1317 | ||
a31f4d8b | 1318 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1319 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1320 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1321 | youngest_stream_iter = candidate_stream_iter; | |
1322 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1323 | /* |
1324 | * The currently selected message to be sent | |
1325 | * downstream next has the exact same timestamp | |
1326 | * that of the current candidate message. We | |
1327 | * must break the tie in a predictable manner. | |
1328 | */ | |
1329 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1330 | /* | |
1331 | * Order the messages in an arbitrary but | |
07afb6bc | 1332 | * deterministic way. |
376fc2bd | 1333 | */ |
07afb6bc FD |
1334 | int ret = common_muxing_compare_messages( |
1335 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1336 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1337 | if (ret < 0) { |
1338 | /* | |
1339 | * The `candidate_stream_iter->current_msg` | |
1340 | * should go first. Update the next | |
1341 | * iterator and the current timestamp. | |
1342 | */ | |
a31f4d8b FD |
1343 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1344 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1345 | } else if (ret == 0) { |
1346 | /* Unable to pick which one should go first. */ | |
1347 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1348 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1349 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1350 | } |
14f28187 FD |
1351 | } |
1352 | ||
1353 | session_idx++; | |
1354 | } | |
1355 | ||
a31f4d8b | 1356 | if (!youngest_stream_iter) { |
14f28187 FD |
1357 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1358 | goto end; | |
1359 | } | |
1360 | ||
98b15851 | 1361 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
14f28187 | 1362 | /* Ensure monotonicity. */ |
98b15851 | 1363 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
a31f4d8b | 1364 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1365 | |
1366 | /* | |
1367 | * Insert the next message to the message batch. This will set | |
1368 | * stream iterator current messsage to NULL so that next time | |
1369 | * we fetch the next message of that stream iterator | |
1370 | */ | |
a31f4d8b | 1371 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1372 | (*count)++; |
1373 | ||
1374 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1375 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1376 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1377 | |
1378 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1379 | } | |
1380 | end: | |
1381 | switch (stream_iter_status) { | |
1382 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1383 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1384 | if (*count > 0) { | |
1385 | /* | |
1386 | * We received a again status but we have some messages | |
1387 | * to send downstream. We send them and return OK for | |
1388 | * now. On the next call we return again if there are | |
1389 | * still no new message to send. | |
1390 | */ | |
d24d5663 | 1391 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
14f28187 | 1392 | } else { |
d24d5663 | 1393 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1394 | } |
7cdc2bab | 1395 | break; |
14f28187 | 1396 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
d24d5663 | 1397 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1398 | break; |
14f28187 | 1399 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
d24d5663 | 1400 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1401 | break; |
1402 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1403 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1404 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
d24d5663 | 1405 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1406 | /* Put all existing messages on error. */ |
1407 | put_messages(msgs, *count); | |
7cdc2bab | 1408 | break; |
14f28187 FD |
1409 | default: |
1410 | abort(); | |
7cdc2bab | 1411 | } |
14f28187 FD |
1412 | |
1413 | no_session: | |
1414 | return status; | |
7cdc2bab | 1415 | } |
41a2b7ae | 1416 | |
7cdc2bab | 1417 | BT_HIDDEN |
21a9f056 | 1418 | bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init( |
14f28187 | 1419 | bt_self_message_iterator *self_msg_it, |
8d8b141d | 1420 | bt_self_message_iterator_configuration *config, |
14f28187 FD |
1421 | bt_self_component_source *self_comp_src, |
1422 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1423 | { |
21a9f056 FD |
1424 | bt_component_class_message_iterator_initialize_method_status ret = |
1425 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK; | |
14f28187 | 1426 | bt_self_component *self_comp = |
d24d5663 | 1427 | bt_self_component_source_as_self_component(self_comp_src); |
14f28187 FD |
1428 | struct lttng_live_component *lttng_live; |
1429 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
c01594de | 1430 | bt_logging_level log_level; |
14f28187 FD |
1431 | |
1432 | BT_ASSERT(self_msg_it); | |
1433 | ||
1434 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1435 | log_level = lttng_live->log_level; |
2ece7dd0 | 1436 | self_comp = lttng_live->self_comp; |
14f28187 FD |
1437 | |
1438 | /* There can be only one downstream iterator at the same time. */ | |
1439 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1440 | lttng_live->has_msg_iter = true; | |
1441 | ||
1442 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1443 | if (!lttng_live_msg_iter) { | |
21a9f056 | 1444 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1445 | goto end; |
7cdc2bab | 1446 | } |
14f28187 | 1447 | |
c01594de | 1448 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
2ece7dd0 | 1449 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
14f28187 FD |
1450 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1451 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1452 | ||
1453 | lttng_live_msg_iter->active_stream_iter = 0; | |
1454 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1455 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1456 | (GDestroyNotify) lttng_live_destroy_session); | |
1457 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1458 | ||
1459 | lttng_live_msg_iter->viewer_connection = | |
1460 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
550004b4 | 1461 | lttng_live_msg_iter, log_level); |
14f28187 FD |
1462 | if (!lttng_live_msg_iter->viewer_connection) { |
1463 | goto error; | |
1464 | } | |
1465 | ||
1466 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1467 | goto error; | |
1468 | } | |
1469 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1470 | switch (lttng_live->params.sess_not_found_act) { | |
1471 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
2ece7dd0 | 1472 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1473 | "session. Keep trying to connect because of " |
1474 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1475 | SESS_NOT_FOUND_ACTION_PARAM, | |
1476 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1477 | lttng_live->params.url->str); | |
1478 | break; | |
1479 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
2ece7dd0 | 1480 | BT_COMP_LOGE("Unable to connect to the requested live viewer " |
14f28187 FD |
1481 | "session. Fail the message iterator" |
1482 | "initialization because of %s=\"%s\" " | |
1483 | "component parameter: url =\"%s\"", | |
1484 | SESS_NOT_FOUND_ACTION_PARAM, | |
1485 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1486 | lttng_live->params.url->str); | |
7cdc2bab | 1487 | goto error; |
14f28187 | 1488 | case SESSION_NOT_FOUND_ACTION_END: |
2ece7dd0 | 1489 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1490 | "session. End gracefully at the first _next() " |
1491 | "call because of %s=\"%s\" component parameter: " | |
1492 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1493 | SESS_NOT_FOUND_ACTION_END_STR, | |
1494 | lttng_live->params.url->str); | |
1495 | break; | |
bce81ff2 | 1496 | default: |
80aff5ef | 1497 | abort(); |
7cdc2bab | 1498 | } |
7cdc2bab MD |
1499 | } |
1500 | ||
14f28187 FD |
1501 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1502 | ||
1503 | goto end; | |
1504 | error: | |
21a9f056 | 1505 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1506 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1507 | end: |
41a2b7ae | 1508 | return ret; |
7cdc2bab MD |
1509 | } |
1510 | ||
80aff5ef SM |
1511 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1512 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1513 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1514 | }; | |
1515 | ||
7cdc2bab | 1516 | static |
d24d5663 PP |
1517 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1518 | const bt_value *params, const bt_value **result, | |
80aff5ef | 1519 | bt_self_component_class *self_comp_class, |
d24d5663 | 1520 | bt_logging_level log_level) |
7cdc2bab | 1521 | { |
80aff5ef | 1522 | bt_component_class_query_method_status status; |
14f28187 | 1523 | const bt_value *url_value = NULL; |
7cdc2bab | 1524 | const char *url; |
14f28187 | 1525 | struct live_viewer_connection *viewer_connection = NULL; |
80aff5ef SM |
1526 | enum bt_param_validation_status validation_status; |
1527 | gchar *validate_error = NULL; | |
7cdc2bab | 1528 | |
80aff5ef SM |
1529 | validation_status = bt_param_validation_validate(params, |
1530 | list_sessions_params, &validate_error); | |
1531 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1532 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1533 | goto error; |
80aff5ef | 1534 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
a635e507 | 1535 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
80aff5ef | 1536 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", validate_error); |
7cdc2bab MD |
1537 | goto error; |
1538 | } | |
1539 | ||
80aff5ef | 1540 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
14f28187 FD |
1541 | url = bt_value_string_get(url_value); |
1542 | ||
550004b4 PP |
1543 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
1544 | log_level); | |
7cdc2bab | 1545 | if (!viewer_connection) { |
80aff5ef | 1546 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1547 | goto error; |
1548 | } | |
1549 | ||
14f28187 | 1550 | status = live_viewer_connection_list_sessions(viewer_connection, |
80aff5ef | 1551 | result); |
d24d5663 | 1552 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
c7eee084 PP |
1553 | goto error; |
1554 | } | |
1555 | ||
7cdc2bab | 1556 | goto end; |
c7eee084 | 1557 | |
7cdc2bab | 1558 | error: |
14f28187 | 1559 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1560 | |
14f28187 | 1561 | if (status >= 0) { |
d24d5663 | 1562 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1563 | } |
1564 | ||
7cdc2bab MD |
1565 | end: |
1566 | if (viewer_connection) { | |
14f28187 | 1567 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1568 | } |
80aff5ef SM |
1569 | |
1570 | g_free(validate_error); | |
1571 | ||
14f28187 | 1572 | return status; |
7cdc2bab MD |
1573 | } |
1574 | ||
312df793 PP |
1575 | static |
1576 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1577 | const bt_value *params, const bt_value **result, | |
1578 | bt_logging_level log_level) | |
1579 | { | |
1580 | bt_component_class_query_method_status status = | |
1581 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1582 | const bt_value *input_type_value; | |
1583 | const bt_value *input_value; | |
1584 | double weight = 0; | |
1585 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1586 | ||
1587 | /* Used by the logging macros */ | |
1588 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1589 | ||
1590 | *result = NULL; | |
1591 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1592 | "type"); | |
1593 | if (!input_type_value) { | |
1594 | BT_COMP_LOGE("Missing expected `type` parameter."); | |
1595 | goto error; | |
1596 | } | |
1597 | ||
1598 | if (!bt_value_is_string(input_type_value)) { | |
1599 | BT_COMP_LOGE("`type` parameter is not a string value."); | |
1600 | goto error; | |
1601 | } | |
1602 | ||
1603 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1604 | /* We don't handle file system paths */ | |
1605 | goto create_result; | |
1606 | } | |
1607 | ||
1608 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1609 | if (!input_value) { | |
1610 | BT_COMP_LOGE("Missing expected `input` parameter."); | |
1611 | goto error; | |
1612 | } | |
1613 | ||
1614 | if (!bt_value_is_string(input_value)) { | |
1615 | BT_COMP_LOGE("`input` parameter is not a string value."); | |
1616 | goto error; | |
1617 | } | |
1618 | ||
1619 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1620 | NULL, 0); | |
1621 | if (parts.session_name) { | |
1622 | /* | |
1623 | * Looks pretty much like an LTTng live URL: we got the | |
1624 | * session name part, which forms a complete URL. | |
1625 | */ | |
1626 | weight = .75; | |
1627 | } | |
1628 | ||
1629 | create_result: | |
1630 | *result = bt_value_real_create_init(weight); | |
1631 | if (!*result) { | |
1632 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1633 | goto error; | |
1634 | } | |
1635 | ||
1636 | goto end; | |
1637 | ||
1638 | error: | |
1639 | if (status >= 0) { | |
1640 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1641 | } | |
1642 | ||
1643 | BT_ASSERT(!*result); | |
1644 | ||
1645 | end: | |
1646 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1647 | return status; | |
1648 | } | |
1649 | ||
7cdc2bab | 1650 | BT_HIDDEN |
d24d5663 PP |
1651 | bt_component_class_query_method_status lttng_live_query( |
1652 | bt_self_component_class_source *comp_class, | |
3c729b9a | 1653 | bt_private_query_executor *priv_query_exec, |
14f28187 | 1654 | const char *object, const bt_value *params, |
7c14d641 | 1655 | __attribute__((unused)) void *method_data, |
3c729b9a | 1656 | const bt_value **result) |
7cdc2bab | 1657 | { |
d24d5663 PP |
1658 | bt_component_class_query_method_status status = |
1659 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 1660 | bt_self_component *self_comp = NULL; |
80aff5ef SM |
1661 | bt_self_component_class *self_comp_class = |
1662 | bt_self_component_class_source_as_self_component_class(comp_class); | |
3c729b9a PP |
1663 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1664 | bt_private_query_executor_as_query_executor_const( | |
1665 | priv_query_exec)); | |
c7eee084 | 1666 | |
7cdc2bab | 1667 | if (strcmp(object, "sessions") == 0) { |
c01594de | 1668 | status = lttng_live_query_list_sessions(params, result, |
80aff5ef | 1669 | self_comp_class, log_level); |
312df793 PP |
1670 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1671 | status = lttng_live_query_support_info(params, result, | |
1672 | log_level); | |
14f28187 | 1673 | } else { |
32a09ecd | 1674 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 1675 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 1676 | goto end; |
7cdc2bab | 1677 | } |
14f28187 FD |
1678 | |
1679 | end: | |
1680 | return status; | |
7cdc2bab MD |
1681 | } |
1682 | ||
1683 | static | |
1684 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1685 | { | |
19bdff20 FD |
1686 | if (!lttng_live) { |
1687 | return; | |
1688 | } | |
14f28187 FD |
1689 | if (lttng_live->params.url) { |
1690 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1691 | } |
1692 | g_free(lttng_live); | |
1693 | } | |
1694 | ||
1695 | BT_HIDDEN | |
14f28187 | 1696 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1697 | { |
14f28187 | 1698 | void *data = bt_self_component_get_data( |
0f1979c3 | 1699 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
1700 | |
1701 | if (!data) { | |
1702 | return; | |
1703 | } | |
1704 | lttng_live_component_destroy_data(data); | |
1705 | } | |
1706 | ||
1707 | static | |
14f28187 FD |
1708 | enum session_not_found_action parse_session_not_found_action_param( |
1709 | const bt_value *no_session_param) | |
1710 | { | |
1711 | enum session_not_found_action action; | |
80aff5ef SM |
1712 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
1713 | ||
14f28187 FD |
1714 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
1715 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1716 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1717 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
14f28187 | 1718 | } else { |
80aff5ef SM |
1719 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
1720 | action = SESSION_NOT_FOUND_ACTION_END; | |
14f28187 FD |
1721 | } |
1722 | ||
1723 | return action; | |
1724 | } | |
1725 | ||
80aff5ef SM |
1726 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
1727 | .type = BT_VALUE_TYPE_STRING, | |
1728 | }; | |
1729 | ||
1730 | static const char *sess_not_found_action_choices[] = { | |
1731 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1732 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1733 | SESS_NOT_FOUND_ACTION_END_STR, | |
1734 | }; | |
1735 | ||
1736 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
1737 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
1738 | .min_length = 1, | |
1739 | .max_length = 1, | |
1740 | .element_type = &inputs_elem_descr, | |
1741 | } } }, | |
1742 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
1743 | .choices = sess_not_found_action_choices, | |
1744 | } } }, | |
1745 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1746 | }; | |
1747 | ||
70384700 | 1748 | static |
80aff5ef SM |
1749 | bt_component_class_initialize_method_status lttng_live_component_create( |
1750 | const bt_value *params, | |
1751 | bt_logging_level log_level, | |
1752 | bt_self_component *self_comp, | |
1753 | struct lttng_live_component **component) | |
7cdc2bab | 1754 | { |
80aff5ef | 1755 | struct lttng_live_component *lttng_live = NULL; |
312df793 PP |
1756 | const bt_value *inputs_value; |
1757 | const bt_value *url_value; | |
1758 | const bt_value *value; | |
7cdc2bab | 1759 | const char *url; |
80aff5ef SM |
1760 | enum bt_param_validation_status validation_status; |
1761 | gchar *validation_error = NULL; | |
1762 | bt_component_class_initialize_method_status status; | |
1763 | ||
1764 | validation_status = bt_param_validation_validate(params, params_descr, | |
1765 | &validation_error); | |
1766 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1767 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
1768 | goto error; | |
1769 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
1770 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
1771 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
1772 | goto error; | |
1773 | } | |
7cdc2bab MD |
1774 | |
1775 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1776 | if (!lttng_live) { | |
80aff5ef | 1777 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1778 | goto end; |
1779 | } | |
c01594de | 1780 | lttng_live->log_level = log_level; |
2ece7dd0 | 1781 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1782 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
1783 | lttng_live->has_msg_iter = false; |
1784 | ||
80aff5ef SM |
1785 | inputs_value = |
1786 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
1787 | url_value = | |
1788 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
312df793 | 1789 | url = bt_value_string_get(url_value); |
80aff5ef | 1790 | |
14f28187 FD |
1791 | lttng_live->params.url = g_string_new(url); |
1792 | if (!lttng_live->params.url) { | |
80aff5ef | 1793 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1794 | goto error; |
1795 | } | |
14f28187 FD |
1796 | |
1797 | value = bt_value_map_borrow_entry_value_const(params, | |
1798 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 | 1799 | if (value) { |
14f28187 FD |
1800 | lttng_live->params.sess_not_found_act = |
1801 | parse_session_not_found_action_param(value); | |
14f28187 | 1802 | } else { |
312df793 PP |
1803 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1804 | "defaulting to `%s`.", | |
14f28187 FD |
1805 | SESS_NOT_FOUND_ACTION_PARAM, |
1806 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1807 | lttng_live->params.sess_not_found_act = | |
1808 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1809 | } |
4c66436f | 1810 | |
80aff5ef | 1811 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
1812 | goto end; |
1813 | ||
1814 | error: | |
1815 | lttng_live_component_destroy_data(lttng_live); | |
1816 | lttng_live = NULL; | |
1817 | end: | |
80aff5ef SM |
1818 | g_free(validation_error); |
1819 | ||
1820 | *component = lttng_live; | |
1821 | return status; | |
d3e4dcd8 PP |
1822 | } |
1823 | ||
f3bc2010 | 1824 | BT_HIDDEN |
21a9f056 | 1825 | bt_component_class_initialize_method_status lttng_live_component_init( |
c01594de | 1826 | bt_self_component_source *self_comp_src, |
59225a3e SM |
1827 | bt_self_component_source_configuration *config, |
1828 | const bt_value *params, | |
1829 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1830 | { |
7cdc2bab | 1831 | struct lttng_live_component *lttng_live; |
80aff5ef | 1832 | bt_component_class_initialize_method_status ret; |
c01594de PP |
1833 | bt_self_component *self_comp = |
1834 | bt_self_component_source_as_self_component(self_comp_src); | |
1835 | bt_logging_level log_level = bt_component_get_logging_level( | |
1836 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 1837 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1838 | |
80aff5ef SM |
1839 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
1840 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
19bdff20 | 1841 | goto error; |
7cdc2bab MD |
1842 | } |
1843 | ||
d24d5663 PP |
1844 | add_port_status = bt_self_component_source_add_output_port( |
1845 | self_comp_src, "out", NULL, NULL); | |
80aff5ef SM |
1846 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
1847 | ret = (int) add_port_status; | |
1848 | goto end; | |
147337a3 | 1849 | } |
7cdc2bab | 1850 | |
c01594de | 1851 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 1852 | goto end; |
7cdc2bab | 1853 | |
19bdff20 FD |
1854 | error: |
1855 | lttng_live_component_destroy_data(lttng_live); | |
1856 | lttng_live = NULL; | |
7cdc2bab MD |
1857 | end: |
1858 | return ret; | |
d85ef162 | 1859 | } |