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> | |
c4f23e30 | 38 | #include <stdbool.h> |
14f28187 FD |
39 | #include <unistd.h> |
40 | ||
578e048b | 41 | #include "common/assert.h" |
3fadfbc0 | 42 | #include <babeltrace2/babeltrace.h> |
578e048b | 43 | #include "compat/compiler.h" |
3fadfbc0 | 44 | #include <babeltrace2/types.h> |
f3bc2010 | 45 | |
376fc2bd | 46 | #include "plugins/common/muxing/muxing.h" |
80aff5ef | 47 | #include "plugins/common/param-validation/param-validation.h" |
376fc2bd | 48 | |
7cdc2bab MD |
49 | #include "data-stream.h" |
50 | #include "metadata.h" | |
14f28187 | 51 | #include "lttng-live.h" |
7cdc2bab | 52 | |
14f28187 FD |
53 | #define MAX_QUERY_SIZE (256*1024) |
54 | #define URL_PARAM "url" | |
312df793 | 55 | #define INPUTS_PARAM "inputs" |
14f28187 FD |
56 | #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action" |
57 | #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue" | |
58 | #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail" | |
59 | #define SESS_NOT_FOUND_ACTION_END_STR "end" | |
7cdc2bab | 60 | |
2ece7dd0 | 61 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 62 | |
14f28187 FD |
63 | static |
64 | const char *print_live_iterator_status(enum lttng_live_iterator_status status) | |
65 | { | |
66 | switch (status) { | |
67 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
68 | return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE"; | |
69 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
70 | return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN"; | |
71 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
72 | return "LTTNG_LIVE_ITERATOR_STATUS_END"; | |
73 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
74 | return "LTTNG_LIVE_ITERATOR_STATUS_OK"; | |
75 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
76 | return "LTTNG_LIVE_ITERATOR_STATUS_INVAL"; | |
77 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
78 | return "LTTNG_LIVE_ITERATOR_STATUS_ERROR"; | |
79 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
80 | return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM"; | |
81 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
82 | return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED"; | |
83 | default: | |
84 | abort(); | |
85 | } | |
86 | } | |
87 | ||
88 | static | |
89 | const char *print_state(struct lttng_live_stream_iterator *s) | |
7cdc2bab MD |
90 | { |
91 | switch (s->state) { | |
92 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
93 | return "ACTIVE_NO_DATA"; | |
94 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
95 | return "QUIESCENT_NO_DATA"; | |
96 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
97 | return "QUIESCENT"; | |
98 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
99 | return "ACTIVE_DATA"; | |
100 | case LTTNG_LIVE_STREAM_EOF: | |
101 | return "EOF"; | |
102 | default: | |
103 | return "ERROR"; | |
104 | } | |
105 | } | |
7cdc2bab | 106 | |
14f28187 FD |
107 | #define print_stream_state(live_stream_iter) \ |
108 | do { \ | |
2ece7dd0 | 109 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
14f28187 FD |
110 | ", curr_inact_ts %" PRId64, \ |
111 | print_state(live_stream_iter), \ | |
112 | live_stream_iter->last_inactivity_ts, \ | |
113 | live_stream_iter->current_inactivity_ts); \ | |
114 | } while (0); | |
6f79a7cf MD |
115 | |
116 | BT_HIDDEN | |
9b4f9b42 | 117 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 118 | { |
14f28187 | 119 | bool ret; |
6f79a7cf | 120 | |
9b4f9b42 | 121 | if (!msg_iter) { |
14f28187 FD |
122 | ret = false; |
123 | goto end; | |
7cdc2bab | 124 | } |
7cdc2bab | 125 | |
9b4f9b42 PP |
126 | ret = bt_self_message_iterator_is_interrupted( |
127 | msg_iter->self_msg_iter); | |
4bf0e537 | 128 | |
14f28187 FD |
129 | end: |
130 | return ret; | |
7cdc2bab MD |
131 | } |
132 | ||
133 | static | |
134 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
135 | uint64_t trace_id) | |
d3e4dcd8 | 136 | { |
14f28187 FD |
137 | uint64_t trace_idx; |
138 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 139 | |
14f28187 FD |
140 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
141 | struct lttng_live_trace *trace = | |
142 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 143 | if (trace->id == trace_id) { |
14f28187 FD |
144 | ret_trace = trace; |
145 | goto end; | |
7cdc2bab MD |
146 | } |
147 | } | |
14f28187 FD |
148 | |
149 | end: | |
150 | return ret_trace; | |
d3eb6e8f PP |
151 | } |
152 | ||
7cdc2bab | 153 | static |
14f28187 | 154 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 155 | { |
c01594de | 156 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 157 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 158 | |
2ece7dd0 | 159 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 160 | |
14f28187 FD |
161 | BT_ASSERT(trace->stream_iterators); |
162 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 163 | |
14f28187 FD |
164 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
165 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 166 | |
7cdc2bab | 167 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
168 | g_free(trace); |
169 | } | |
170 | ||
171 | static | |
172 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
173 | uint64_t trace_id) | |
174 | { | |
175 | struct lttng_live_trace *trace = NULL; | |
c01594de | 176 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 177 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab MD |
178 | |
179 | trace = g_new0(struct lttng_live_trace, 1); | |
180 | if (!trace) { | |
181 | goto error; | |
182 | } | |
c01594de | 183 | trace->log_level = session->log_level; |
2ece7dd0 | 184 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
185 | trace->session = session; |
186 | trace->id = trace_id; | |
14f28187 FD |
187 | trace->trace_class = NULL; |
188 | trace->trace = NULL; | |
189 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0f1979c3 | 190 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
14f28187 | 191 | BT_ASSERT(trace->stream_iterators); |
7cdc2bab | 192 | trace->new_metadata_needed = true; |
14f28187 FD |
193 | g_ptr_array_add(session->traces, trace); |
194 | ||
2ece7dd0 | 195 | BT_COMP_LOGI("Create trace"); |
7cdc2bab MD |
196 | goto end; |
197 | error: | |
198 | g_free(trace); | |
199 | trace = NULL; | |
200 | end: | |
201 | return trace; | |
202 | } | |
203 | ||
204 | BT_HIDDEN | |
14f28187 FD |
205 | struct lttng_live_trace *lttng_live_borrow_trace( |
206 | struct lttng_live_session *session, uint64_t trace_id) | |
7cdc2bab MD |
207 | { |
208 | struct lttng_live_trace *trace; | |
209 | ||
210 | trace = lttng_live_find_trace(session, trace_id); | |
211 | if (trace) { | |
14f28187 | 212 | goto end; |
7cdc2bab | 213 | } |
7cdc2bab | 214 | |
14f28187 FD |
215 | /* The session is the owner of the newly created trace. */ |
216 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 217 | |
14f28187 FD |
218 | end: |
219 | return trace; | |
7cdc2bab MD |
220 | } |
221 | ||
222 | BT_HIDDEN | |
14f28187 | 223 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
224 | uint64_t session_id, const char *hostname, |
225 | const char *session_name) | |
7cdc2bab MD |
226 | { |
227 | int ret = 0; | |
14f28187 | 228 | struct lttng_live_session *session; |
c01594de | 229 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 230 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 231 | |
14f28187 FD |
232 | session = g_new0(struct lttng_live_session, 1); |
233 | if (!session) { | |
7cdc2bab MD |
234 | goto error; |
235 | } | |
236 | ||
c01594de | 237 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 238 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
239 | session->id = session_id; |
240 | session->traces = g_ptr_array_new_with_free_func( | |
0f1979c3 | 241 | (GDestroyNotify) lttng_live_destroy_trace); |
14f28187 FD |
242 | BT_ASSERT(session->traces); |
243 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
244 | session->new_streams_needed = true; | |
245 | session->hostname = g_string_new(hostname); | |
246 | BT_ASSERT(session->hostname); | |
247 | ||
248 | session->session_name = g_string_new(session_name); | |
249 | BT_ASSERT(session->session_name); | |
7cdc2bab | 250 | |
2ece7dd0 | 251 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
14f28187 FD |
252 | session->id, hostname, session_name); |
253 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); | |
7cdc2bab MD |
254 | goto end; |
255 | error: | |
2ece7dd0 | 256 | BT_COMP_LOGE("Error adding session"); |
14f28187 | 257 | g_free(session); |
7cdc2bab MD |
258 | ret = -1; |
259 | end: | |
260 | return ret; | |
261 | } | |
262 | ||
263 | static | |
264 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
265 | { | |
c01594de | 266 | bt_logging_level log_level; |
2ece7dd0 | 267 | bt_self_component *self_comp; |
14f28187 FD |
268 | |
269 | if (!session) { | |
270 | goto end; | |
271 | } | |
7cdc2bab | 272 | |
c01594de | 273 | log_level = session->log_level; |
2ece7dd0 PP |
274 | self_comp = session->self_comp; |
275 | BT_COMP_LOGD("Destroy lttng live session"); | |
7cdc2bab MD |
276 | if (session->id != -1ULL) { |
277 | if (lttng_live_detach_session(session)) { | |
0757916e FD |
278 | if (!lttng_live_graph_is_canceled( |
279 | session->lttng_live_msg_iter)) { | |
4c66436f | 280 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 281 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
282 | session->id); |
283 | } | |
7cdc2bab MD |
284 | } |
285 | session->id = -1ULL; | |
286 | } | |
14f28187 FD |
287 | |
288 | if (session->traces) { | |
289 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 290 | } |
14f28187 | 291 | |
06994c71 MD |
292 | if (session->hostname) { |
293 | g_string_free(session->hostname, TRUE); | |
294 | } | |
295 | if (session->session_name) { | |
296 | g_string_free(session->session_name, TRUE); | |
297 | } | |
7cdc2bab | 298 | g_free(session); |
14f28187 FD |
299 | |
300 | end: | |
301 | return; | |
7cdc2bab MD |
302 | } |
303 | ||
14f28187 FD |
304 | static |
305 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 306 | { |
14f28187 FD |
307 | if (!lttng_live_msg_iter) { |
308 | goto end; | |
7cdc2bab | 309 | } |
7cdc2bab | 310 | |
14f28187 FD |
311 | if (lttng_live_msg_iter->sessions) { |
312 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 313 | } |
14f28187 FD |
314 | |
315 | BT_OBJECT_PUT_REF_AND_RESET(lttng_live_msg_iter->viewer_connection); | |
316 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); | |
317 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
318 | ||
319 | /* All stream iterators must be destroyed at this point. */ | |
320 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
321 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
322 | ||
323 | g_free(lttng_live_msg_iter); | |
324 | ||
325 | end: | |
326 | return; | |
327 | } | |
328 | ||
329 | BT_HIDDEN | |
330 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
331 | { | |
332 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
333 | ||
334 | BT_ASSERT(self_msg_iter); | |
335 | ||
336 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
337 | BT_ASSERT(lttng_live_msg_iter); | |
338 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
339 | } |
340 | ||
341 | static | |
14f28187 | 342 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
343 | struct lttng_live_stream_iterator *lttng_live_stream) |
344 | { | |
c01594de | 345 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 346 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 347 | |
7cdc2bab MD |
348 | switch (lttng_live_stream->state) { |
349 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
350 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
351 | break; | |
352 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
353 | /* Invalid state. */ | |
2ece7dd0 | 354 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
087bc060 | 355 | abort(); |
7cdc2bab MD |
356 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
357 | /* Invalid state. */ | |
2ece7dd0 | 358 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
087bc060 | 359 | abort(); |
7cdc2bab MD |
360 | case LTTNG_LIVE_STREAM_EOF: |
361 | break; | |
362 | } | |
14f28187 | 363 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
364 | } |
365 | ||
366 | /* | |
367 | * For active no data stream, fetch next data. It can be either: | |
368 | * - quiescent: need to put it in the prio heap at quiescent end | |
369 | * timestamp, | |
370 | * - have data: need to wire up first event into the prio heap, | |
371 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
372 | * return EOF. | |
373 | */ | |
374 | static | |
14f28187 FD |
375 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
376 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
377 | struct lttng_live_stream_iterator *lttng_live_stream) |
378 | { | |
c01594de | 379 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 380 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 | 381 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 382 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
0f1979c3 | 383 | struct packet_index index; |
7cdc2bab MD |
384 | |
385 | if (lttng_live_stream->trace->new_metadata_needed) { | |
14f28187 | 386 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
387 | goto end; |
388 | } | |
389 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
14f28187 | 390 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
391 | goto end; |
392 | } | |
14f28187 FD |
393 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
394 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
395 | goto end; |
396 | } | |
14f28187 FD |
397 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
398 | &index); | |
399 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
7cdc2bab MD |
400 | goto end; |
401 | } | |
98b15851 | 402 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 403 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 FD |
404 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
405 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
406 | ||
407 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
408 | last_inact_ts == curr_inact_ts) { | |
409 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
7cdc2bab MD |
410 | print_stream_state(lttng_live_stream); |
411 | } else { | |
14f28187 | 412 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
413 | } |
414 | goto end; | |
415 | } | |
416 | lttng_live_stream->base_offset = index.offset; | |
417 | lttng_live_stream->offset = index.offset; | |
418 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
419 | end: | |
14f28187 FD |
420 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
421 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
422 | } |
423 | return ret; | |
424 | } | |
425 | ||
426 | /* | |
14f28187 FD |
427 | * Creation of the message requires the ctf trace class to be created |
428 | * beforehand, but the live protocol gives us all streams (including metadata) | |
429 | * at once. So we split it in three steps: getting streams, getting metadata | |
430 | * (which creates the ctf trace class), and then creating the per-stream | |
431 | * messages. | |
7cdc2bab MD |
432 | */ |
433 | static | |
14f28187 FD |
434 | enum lttng_live_iterator_status lttng_live_get_session( |
435 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
436 | struct lttng_live_session *session) |
437 | { | |
14f28187 FD |
438 | enum lttng_live_iterator_status status; |
439 | uint64_t trace_idx; | |
440 | int ret = 0; | |
7cdc2bab | 441 | |
14f28187 FD |
442 | if (!session->attached) { |
443 | ret = lttng_live_attach_session(session); | |
444 | if (ret) { | |
0757916e | 445 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
14f28187 FD |
446 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
447 | } else { | |
448 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
449 | } | |
450 | goto end; | |
4c66436f | 451 | } |
7cdc2bab | 452 | } |
14f28187 | 453 | |
7cdc2bab | 454 | status = lttng_live_get_new_streams(session); |
14f28187 FD |
455 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
456 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
457 | goto end; | |
7cdc2bab | 458 | } |
14f28187 FD |
459 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
460 | struct lttng_live_trace *trace = | |
461 | g_ptr_array_index(session->traces, trace_idx); | |
462 | ||
7cdc2bab | 463 | status = lttng_live_metadata_update(trace); |
14f28187 FD |
464 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
465 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
466 | goto end; | |
7cdc2bab MD |
467 | } |
468 | } | |
14f28187 FD |
469 | status = lttng_live_lazy_msg_init(session); |
470 | ||
471 | end: | |
472 | return status; | |
7cdc2bab MD |
473 | } |
474 | ||
475 | BT_HIDDEN | |
14f28187 | 476 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 477 | { |
14f28187 | 478 | uint64_t session_idx; |
7cdc2bab | 479 | |
14f28187 FD |
480 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
481 | session_idx++) { | |
482 | struct lttng_live_session *session = | |
483 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
484 | session->new_streams_needed = true; |
485 | } | |
486 | } | |
487 | ||
488 | static | |
14f28187 | 489 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 490 | { |
14f28187 | 491 | uint64_t session_idx, trace_idx; |
7cdc2bab | 492 | |
14f28187 FD |
493 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
494 | session_idx++) { | |
495 | struct lttng_live_session *session = | |
496 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 497 | session->new_streams_needed = true; |
14f28187 FD |
498 | for (trace_idx = 0; trace_idx < session->traces->len; |
499 | trace_idx++) { | |
500 | struct lttng_live_trace *trace = | |
501 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
502 | trace->new_metadata_needed = true; |
503 | } | |
504 | } | |
505 | } | |
506 | ||
507 | static | |
14f28187 FD |
508 | enum lttng_live_iterator_status |
509 | lttng_live_iterator_handle_new_streams_and_metadata( | |
510 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 511 | { |
0f1979c3 | 512 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
14f28187 FD |
513 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
514 | struct lttng_live_session *session; | |
515 | enum session_not_found_action sess_not_found_act = | |
516 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
517 | ||
7cdc2bab | 518 | /* |
14f28187 | 519 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
520 | * session" flag to the protocol, which would tell us that we |
521 | * need to query for new sessions even though we have sessions | |
522 | * currently ongoing. | |
523 | */ | |
14f28187 FD |
524 | if (lttng_live_msg_iter->sessions->len == 0) { |
525 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
526 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
527 | goto end; | |
528 | } else { | |
529 | /* | |
530 | * Retry to create a viewer session for the requested | |
531 | * session name. | |
532 | */ | |
533 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
534 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
535 | goto end; | |
536 | } | |
537 | } | |
7cdc2bab | 538 | } |
14f28187 FD |
539 | |
540 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
541 | session_idx++) { | |
542 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
543 | session_idx); | |
544 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 545 | switch (ret) { |
14f28187 | 546 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 547 | break; |
14f28187 FD |
548 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
549 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
550 | break; |
551 | default: | |
552 | goto end; | |
553 | } | |
554 | if (!session->closed) { | |
555 | nr_sessions_opened++; | |
556 | } | |
557 | } | |
558 | end: | |
14f28187 FD |
559 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
560 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
561 | nr_sessions_opened == 0) { | |
562 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
563 | } |
564 | return ret; | |
565 | } | |
566 | ||
567 | static | |
14f28187 FD |
568 | enum lttng_live_iterator_status emit_inactivity_message( |
569 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
570 | struct lttng_live_stream_iterator *stream_iter, | |
571 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 572 | { |
0f1979c3 | 573 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
14f28187 | 574 | bt_message *msg = NULL; |
7cdc2bab | 575 | |
14f28187 FD |
576 | BT_ASSERT(stream_iter->trace->clock_class); |
577 | ||
578 | msg = bt_message_message_iterator_inactivity_create( | |
0f1979c3 FD |
579 | lttng_live_msg_iter->self_msg_iter, |
580 | stream_iter->trace->clock_class, timestamp); | |
d6e69534 | 581 | if (!msg) { |
7cdc2bab MD |
582 | goto error; |
583 | } | |
14f28187 | 584 | |
d6e69534 | 585 | *message = msg; |
7cdc2bab | 586 | end: |
7cdc2bab MD |
587 | return ret; |
588 | ||
589 | error: | |
14f28187 | 590 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 591 | bt_message_put_ref(msg); |
7cdc2bab MD |
592 | goto end; |
593 | } | |
594 | ||
595 | static | |
14f28187 FD |
596 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
597 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 598 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 599 | bt_message **message) |
7cdc2bab | 600 | { |
0f1979c3 | 601 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
602 | |
603 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 604 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
605 | } |
606 | ||
14f28187 FD |
607 | if (lttng_live_stream->current_inactivity_ts == |
608 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 609 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
14f28187 FD |
610 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
611 | goto end; | |
612 | } | |
613 | ||
614 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0f1979c3 | 615 | message, lttng_live_stream->current_inactivity_ts); |
14f28187 FD |
616 | |
617 | lttng_live_stream->last_inactivity_ts = | |
0f1979c3 | 618 | lttng_live_stream->current_inactivity_ts; |
14f28187 FD |
619 | end: |
620 | return ret; | |
621 | } | |
622 | ||
623 | static | |
624 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
625 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
626 | const bt_message *msg, int64_t last_msg_ts_ns, | |
627 | int64_t *ts_ns) | |
628 | { | |
629 | const bt_clock_class *clock_class = NULL; | |
630 | const bt_clock_snapshot *clock_snapshot = NULL; | |
631 | int ret = 0; | |
c01594de | 632 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 633 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 634 | |
98b15851 PP |
635 | BT_ASSERT_DBG(msg); |
636 | BT_ASSERT_DBG(ts_ns); | |
14f28187 | 637 | |
2ece7dd0 | 638 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
639 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
640 | last_msg_ts_ns); | |
641 | ||
642 | switch (bt_message_get_type(msg)) { | |
643 | case BT_MESSAGE_TYPE_EVENT: | |
0f1979c3 | 644 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
14f28187 | 645 | msg); |
98b15851 | 646 | BT_ASSERT_DBG(clock_class); |
14f28187 | 647 | |
0cbc2c33 PP |
648 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
649 | msg); | |
14f28187 FD |
650 | break; |
651 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0f1979c3 | 652 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
653 | msg); |
654 | BT_ASSERT(clock_class); | |
655 | ||
0cbc2c33 PP |
656 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
657 | msg); | |
14f28187 FD |
658 | break; |
659 | case BT_MESSAGE_TYPE_PACKET_END: | |
0f1979c3 | 660 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
661 | msg); |
662 | BT_ASSERT(clock_class); | |
663 | ||
0cbc2c33 PP |
664 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
665 | msg); | |
14f28187 FD |
666 | break; |
667 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0f1979c3 | 668 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
669 | msg); |
670 | BT_ASSERT(clock_class); | |
671 | ||
9b24b6aa | 672 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 673 | msg); |
14f28187 FD |
674 | break; |
675 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0f1979c3 | 676 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
677 | msg); |
678 | BT_ASSERT(clock_class); | |
679 | ||
9b24b6aa | 680 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 681 | msg); |
14f28187 | 682 | break; |
14f28187 | 683 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0f1979c3 FD |
684 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
685 | msg); | |
14f28187 FD |
686 | break; |
687 | default: | |
688 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 689 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 690 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
691 | goto end; |
692 | } | |
693 | ||
14f28187 | 694 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
98b15851 | 695 | BT_ASSERT_DBG(clock_class); |
14f28187 FD |
696 | |
697 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
698 | if (ret) { | |
2ece7dd0 | 699 | BT_COMP_LOGE("Cannot get nanoseconds from Epoch of clock snapshot: " |
14f28187 FD |
700 | "clock-snapshot-addr=%p", clock_snapshot); |
701 | goto error; | |
702 | } | |
703 | ||
704 | goto end; | |
705 | ||
14f28187 FD |
706 | error: |
707 | ret = -1; | |
7cdc2bab | 708 | |
7cdc2bab | 709 | end: |
14f28187 | 710 | if (ret == 0) { |
2ece7dd0 | 711 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
712 | "iter-data-addr=%p, msg-addr=%p, " |
713 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
714 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
715 | } | |
716 | ||
7cdc2bab MD |
717 | return ret; |
718 | } | |
719 | ||
720 | static | |
14f28187 FD |
721 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
722 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 723 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 724 | bt_message **message) |
7cdc2bab | 725 | { |
14f28187 | 726 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
c01594de | 727 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 728 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 FD |
729 | enum bt_msg_iter_status status; |
730 | uint64_t session_idx, trace_idx; | |
7cdc2bab | 731 | |
14f28187 FD |
732 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
733 | session_idx++) { | |
734 | struct lttng_live_session *session = | |
735 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
736 | |
737 | if (session->new_streams_needed) { | |
14f28187 FD |
738 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
739 | goto end; | |
7cdc2bab | 740 | } |
14f28187 FD |
741 | for (trace_idx = 0; trace_idx < session->traces->len; |
742 | trace_idx++) { | |
743 | struct lttng_live_trace *trace = | |
744 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 745 | if (trace->new_metadata_needed) { |
14f28187 FD |
746 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
747 | goto end; | |
7cdc2bab MD |
748 | } |
749 | } | |
750 | } | |
751 | ||
752 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 FD |
753 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
754 | goto end; | |
7cdc2bab | 755 | } |
14f28187 FD |
756 | |
757 | status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter, | |
758 | lttng_live_msg_iter->self_msg_iter, message); | |
7cdc2bab | 759 | switch (status) { |
d6e69534 | 760 | case BT_MSG_ITER_STATUS_EOF: |
14f28187 | 761 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 762 | break; |
d6e69534 | 763 | case BT_MSG_ITER_STATUS_OK: |
14f28187 | 764 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 765 | break; |
d6e69534 | 766 | case BT_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
767 | /* |
768 | * Continue immediately (end of packet). The next | |
769 | * get_index may return AGAIN to delay the following | |
770 | * attempt. | |
771 | */ | |
14f28187 | 772 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 773 | break; |
d6e69534 | 774 | case BT_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 775 | /* No argument provided by the user, so don't return INVAL. */ |
d6e69534 | 776 | case BT_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 777 | default: |
14f28187 | 778 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
2ece7dd0 | 779 | BT_COMP_LOGW("CTF msg iterator return an error or failed msg_iter=%p", |
14f28187 | 780 | lttng_live_stream->msg_iter); |
7cdc2bab MD |
781 | break; |
782 | } | |
14f28187 FD |
783 | |
784 | end: | |
7cdc2bab MD |
785 | return ret; |
786 | } | |
787 | ||
4a39caef FD |
788 | static |
789 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
790 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
791 | struct lttng_live_stream_iterator *stream_iter, | |
792 | bt_message **curr_msg) | |
793 | { | |
794 | enum lttng_live_iterator_status live_status = | |
795 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
796 | /* | |
797 | * The viewer has hung up on us so we are closing the stream. The | |
798 | * `bt_msg_iter` should simply realize that it needs to close the | |
799 | * stream properly by emitting the necessary stream end message. | |
800 | */ | |
0f1979c3 FD |
801 | enum bt_msg_iter_status status = bt_msg_iter_get_next_message( |
802 | stream_iter->msg_iter, lttng_live_msg_iter->self_msg_iter, | |
803 | curr_msg); | |
4a39caef FD |
804 | |
805 | if (status == BT_MSG_ITER_STATUS_ERROR) { | |
806 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
807 | goto end; | |
808 | } | |
809 | ||
810 | BT_ASSERT(status == BT_MSG_ITER_STATUS_OK); | |
811 | ||
812 | end: | |
813 | return live_status; | |
814 | } | |
815 | ||
7cdc2bab MD |
816 | /* |
817 | * helper function: | |
818 | * handle_no_data_streams() | |
819 | * retry: | |
820 | * - for each ACTIVE_NO_DATA stream: | |
821 | * - query relayd for stream data, or quiescence info. | |
822 | * - if need metadata, get metadata, goto retry. | |
823 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
824 | * - if quiescent, move to QUIESCENT streams | |
825 | * - if fetched data, move to ACTIVE_DATA streams | |
826 | * (at this point each stream either has data, or is quiescent) | |
827 | * | |
828 | * | |
829 | * iterator_next: | |
830 | * handle_new_streams_and_metadata() | |
831 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
832 | * - query relayd for metadata | |
833 | * | |
834 | * call handle_active_no_data_streams() | |
835 | * | |
836 | * handle_quiescent_streams() | |
837 | * - if at least one stream is ACTIVE_DATA: | |
838 | * - peek stream event with lowest timestamp -> next_ts | |
839 | * - for each quiescent stream | |
840 | * - if next_ts >= quiescent end | |
841 | * - set state to ACTIVE_NO_DATA | |
842 | * - else | |
843 | * - for each quiescent stream | |
844 | * - set state to ACTIVE_NO_DATA | |
845 | * | |
846 | * call handle_active_no_data_streams() | |
847 | * | |
848 | * handle_active_data_streams() | |
849 | * - if at least one stream is ACTIVE_DATA: | |
850 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 851 | * - make that stream event the current message. |
7cdc2bab MD |
852 | * - move this stream heap position to its next event |
853 | * - if we need to fetch data from relayd, move | |
854 | * stream to ACTIVE_NO_DATA. | |
855 | * - return OK | |
856 | * - return AGAIN | |
857 | * | |
858 | * end criterion: ctrl-c on client. If relayd exits or the session | |
859 | * closes on the relay daemon side, we keep on waiting for streams. | |
860 | * Eventually handle --end timestamp (also an end criterion). | |
861 | * | |
862 | * When disconnected from relayd: try to re-connect endlessly. | |
863 | */ | |
864 | static | |
a31f4d8b | 865 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
866 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
867 | struct lttng_live_stream_iterator *stream_iter, | |
868 | bt_message **curr_msg) | |
7cdc2bab | 869 | { |
c01594de | 870 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 871 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 872 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 873 | |
4a39caef FD |
874 | if (stream_iter->has_stream_hung_up) { |
875 | /* | |
876 | * The stream has hung up and the stream was properly closed | |
877 | * during the last call to the current function. Return _END | |
878 | * status now so that this stream iterator is removed for the | |
879 | * stream iterator list. | |
880 | */ | |
881 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
882 | goto end; | |
883 | } | |
884 | ||
7cdc2bab MD |
885 | retry: |
886 | print_stream_state(stream_iter); | |
14f28187 | 887 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0f1979c3 | 888 | lttng_live_msg_iter); |
14f28187 | 889 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
890 | goto end; |
891 | } | |
14f28187 | 892 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0f1979c3 | 893 | lttng_live_msg_iter, stream_iter); |
4a39caef | 894 | |
14f28187 | 895 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
896 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
897 | /* | |
898 | * We overwrite `live_status` since `curr_msg` is | |
899 | * likely set to a valid message in this function. | |
900 | */ | |
901 | live_status = lttng_live_iterator_close_stream( | |
902 | lttng_live_msg_iter, stream_iter, curr_msg); | |
903 | } | |
7cdc2bab MD |
904 | goto end; |
905 | } | |
14f28187 | 906 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0f1979c3 | 907 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 908 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 909 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
910 | goto end; |
911 | } | |
14f28187 | 912 | if (*curr_msg) { |
7cdc2bab MD |
913 | goto end; |
914 | } | |
14f28187 | 915 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0f1979c3 | 916 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 917 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 918 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
919 | } |
920 | ||
921 | end: | |
14f28187 | 922 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 923 | goto retry; |
7cdc2bab | 924 | } |
14f28187 FD |
925 | |
926 | return live_status; | |
7cdc2bab MD |
927 | } |
928 | ||
929 | static | |
14f28187 FD |
930 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
931 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
932 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 933 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 934 | { |
a31f4d8b | 935 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0f1979c3 FD |
936 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
937 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 938 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 939 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 940 | uint64_t stream_iter_idx; |
7cdc2bab | 941 | |
98b15851 PP |
942 | BT_ASSERT_DBG(live_trace); |
943 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
14f28187 FD |
944 | /* |
945 | * Update the current message of every stream iterators of this trace. | |
946 | * The current msg of every stream must have a timestamp equal or | |
947 | * larger than the last message returned by this iterator. We must | |
948 | * ensure monotonicity. | |
949 | */ | |
950 | stream_iter_idx = 0; | |
951 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
952 | bool stream_iter_is_ended = false; | |
953 | struct lttng_live_stream_iterator *stream_iter = | |
954 | g_ptr_array_index(live_trace->stream_iterators, | |
0f1979c3 | 955 | stream_iter_idx); |
14f28187 FD |
956 | |
957 | /* | |
958 | * Find if there is are now current message for this stream | |
959 | * iterator get it. | |
960 | */ | |
961 | while (!stream_iter->current_msg) { | |
962 | bt_message *msg = NULL; | |
963 | int64_t curr_msg_ts_ns = INT64_MAX; | |
a31f4d8b | 964 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0f1979c3 | 965 | lttng_live_msg_iter, stream_iter, &msg); |
14f28187 | 966 | |
2ece7dd0 | 967 | BT_COMP_LOGD("live stream iterator returned status :%s", |
0f1979c3 | 968 | print_live_iterator_status(stream_iter_status)); |
14f28187 FD |
969 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
970 | stream_iter_is_ended = true; | |
971 | break; | |
972 | } | |
973 | ||
974 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
975 | goto end; | |
976 | } | |
977 | ||
98b15851 | 978 | BT_ASSERT_DBG(msg); |
14f28187 FD |
979 | |
980 | /* | |
981 | * Get the timestamp in nanoseconds from origin of this | |
982 | * messsage. | |
983 | */ | |
984 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
985 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
986 | &curr_msg_ts_ns); | |
987 | ||
988 | /* | |
989 | * Check if the message of the current live stream | |
990 | * iterator occured at the exact same time or after the | |
991 | * last message returned by this component's message | |
992 | * iterator. If not, we return an error. | |
993 | */ | |
994 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
995 | stream_iter->current_msg = msg; | |
996 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
997 | } else { | |
998 | /* | |
999 | * We received a message in the past. To ensure | |
1000 | * monotonicity, we can't send it forward. | |
1001 | */ | |
2ece7dd0 | 1002 | BT_COMP_LOGE("Message's timestamp is less than " |
14f28187 FD |
1003 | "lttng-live's message iterator's last " |
1004 | "returned timestamp: " | |
1005 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1006 | "last-msg-ts=%" PRId64, | |
1007 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1008 | lttng_live_msg_iter->last_msg_ts_ns); | |
1009 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1010 | goto end; | |
1011 | } | |
1012 | } | |
1013 | ||
98b15851 | 1014 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1015 | |
1016 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1017 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1018 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1019 | /* |
1020 | * Update the current best candidate message | |
1021 | * for the stream iterator of this live trace | |
1022 | * to be forwarded downstream. | |
1023 | */ | |
a31f4d8b FD |
1024 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1025 | youngest_candidate_stream_iter = stream_iter; | |
1026 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1027 | /* |
1028 | * Order the messages in an arbitrary but | |
1029 | * deterministic way. | |
1030 | */ | |
98b15851 | 1031 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1032 | int ret = common_muxing_compare_messages( |
1033 | stream_iter->current_msg, | |
a31f4d8b | 1034 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1035 | if (ret < 0) { |
1036 | /* | |
a31f4d8b | 1037 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1038 | * should go first. Update the next |
1039 | * iterator and the current timestamp. | |
1040 | */ | |
a31f4d8b FD |
1041 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1042 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1043 | } else if (ret == 0) { |
1044 | /* | |
1045 | * Unable to pick which one should go | |
1046 | * first. | |
1047 | */ | |
1048 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1049 | "stream-iter-addr=%p" | |
1050 | "stream-iter-addr=%p", | |
1051 | stream_iter, | |
a31f4d8b | 1052 | youngest_candidate_stream_iter); |
07afb6bc FD |
1053 | } |
1054 | } | |
14f28187 | 1055 | |
07afb6bc FD |
1056 | stream_iter_idx++; |
1057 | } else { | |
14f28187 | 1058 | /* |
fba9b58e JG |
1059 | * The live stream iterator has ended. That |
1060 | * iterator is removed from the array, but | |
1061 | * there is no need to increment | |
1062 | * stream_iter_idx as | |
1063 | * g_ptr_array_remove_index_fast replaces the | |
1064 | * removed element with the array's last | |
1065 | * element. | |
14f28187 | 1066 | */ |
fba9b58e JG |
1067 | g_ptr_array_remove_index_fast( |
1068 | live_trace->stream_iterators, | |
14f28187 | 1069 | stream_iter_idx); |
14f28187 FD |
1070 | } |
1071 | } | |
1072 | ||
a31f4d8b FD |
1073 | if (youngest_candidate_stream_iter) { |
1074 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1075 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1076 | } else { | |
1077 | /* | |
1078 | * The only case where we don't have a candidate for this trace | |
1079 | * is if we reached the end of all the iterators. | |
1080 | */ | |
1081 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1082 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1083 | } | |
1084 | ||
1085 | end: | |
1086 | return stream_iter_status; | |
1087 | } | |
1088 | ||
1089 | static | |
1090 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1091 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1092 | struct lttng_live_session *session, | |
a31f4d8b | 1093 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1094 | { |
07afb6bc FD |
1095 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1096 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1097 | enum lttng_live_iterator_status stream_iter_status; |
1098 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1099 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1100 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 FD |
1101 | |
1102 | /* | |
1103 | * Make sure we are attached to the session and look for new streams | |
1104 | * and metadata. | |
1105 | */ | |
1106 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1107 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1108 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1109 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1110 | goto end; |
1111 | } | |
14f28187 | 1112 | |
98b15851 | 1113 | BT_ASSERT_DBG(session->traces); |
14f28187 | 1114 | |
14f28187 FD |
1115 | while (trace_idx < session->traces->len) { |
1116 | bool trace_is_ended = false; | |
1117 | struct lttng_live_stream_iterator *stream_iter; | |
1118 | struct lttng_live_trace *trace = | |
1119 | g_ptr_array_index(session->traces, trace_idx); | |
1120 | ||
1121 | stream_iter_status = next_stream_iterator_for_trace( | |
1122 | lttng_live_msg_iter, trace, &stream_iter); | |
1123 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1124 | /* | |
1125 | * All the live stream iterators for this trace are | |
1126 | * ENDed. Remove the trace from this session. | |
1127 | */ | |
1128 | trace_is_ended = true; | |
1129 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1130 | goto end; | |
1131 | } | |
1132 | ||
1133 | if (!trace_is_ended) { | |
98b15851 | 1134 | BT_ASSERT_DBG(stream_iter); |
14f28187 | 1135 | |
a31f4d8b FD |
1136 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1137 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1138 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1139 | youngest_candidate_stream_iter = stream_iter; | |
1140 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1141 | /* |
1142 | * Order the messages in an arbitrary but | |
1143 | * deterministic way. | |
1144 | */ | |
1145 | int ret = common_muxing_compare_messages( | |
1146 | stream_iter->current_msg, | |
a31f4d8b | 1147 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1148 | if (ret < 0) { |
1149 | /* | |
a31f4d8b | 1150 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1151 | * should go first. Update the next iterator |
1152 | * and the current timestamp. | |
1153 | */ | |
a31f4d8b FD |
1154 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1155 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1156 | } else if (ret == 0) { |
1157 | /* Unable to pick which one should go first. */ | |
1158 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1159 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1160 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1161 | } |
14f28187 FD |
1162 | } |
1163 | trace_idx++; | |
1164 | } else { | |
ba90bce7 JG |
1165 | /* |
1166 | * trace_idx is not incremented since | |
1167 | * g_ptr_array_remove_index_fast replaces the | |
1168 | * element at trace_idx with the array's last element. | |
1169 | */ | |
1170 | g_ptr_array_remove_index_fast(session->traces, | |
1171 | trace_idx); | |
14f28187 FD |
1172 | } |
1173 | } | |
a31f4d8b FD |
1174 | if (youngest_candidate_stream_iter) { |
1175 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1176 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1177 | } else { |
14f28187 FD |
1178 | /* |
1179 | * The only cases where we don't have a candidate for this | |
1180 | * trace is: | |
1181 | * 1. if we reached the end of all the iterators of all the | |
1182 | * traces of this session, | |
1183 | * 2. if we never had live stream iterator in the first place. | |
1184 | * | |
1185 | * In either cases, we return END. | |
1186 | */ | |
1187 | BT_ASSERT(session->traces->len == 0); | |
1188 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1189 | } |
1190 | end: | |
14f28187 FD |
1191 | return stream_iter_status; |
1192 | } | |
1193 | ||
1194 | static inline | |
1195 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1196 | { | |
1197 | uint64_t i; | |
1198 | ||
1199 | for (i = 0; i < count; i++) { | |
1200 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1201 | } |
7cdc2bab MD |
1202 | } |
1203 | ||
d3eb6e8f | 1204 | BT_HIDDEN |
d24d5663 | 1205 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1206 | bt_self_message_iterator *self_msg_it, |
1207 | bt_message_array_const msgs, uint64_t capacity, | |
1208 | uint64_t *count) | |
d3eb6e8f | 1209 | { |
d24d5663 | 1210 | bt_component_class_message_iterator_next_method_status status; |
14f28187 FD |
1211 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1212 | bt_self_message_iterator_get_data(self_msg_it); | |
1213 | struct lttng_live_component *lttng_live = | |
1214 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1215 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1216 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1217 | enum lttng_live_iterator_status stream_iter_status; |
1218 | uint64_t session_idx; | |
1219 | ||
1220 | *count = 0; | |
1221 | ||
98b15851 | 1222 | BT_ASSERT_DBG(lttng_live_msg_iter); |
14f28187 FD |
1223 | |
1224 | /* | |
1225 | * Clear all the invalid message reference that might be left over in | |
1226 | * the output array. | |
1227 | */ | |
1228 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1229 | ||
1230 | /* | |
1231 | * If no session are exposed on the relay found at the url provided by | |
1232 | * the user, session count will be 0. In this case, we return status | |
1233 | * end to return gracefully. | |
1234 | */ | |
1235 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1236 | if (lttng_live->params.sess_not_found_act != | |
1237 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
d24d5663 | 1238 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
14f28187 FD |
1239 | goto no_session; |
1240 | } else { | |
1241 | /* | |
1242 | * The are no more active session for this session | |
1243 | * name. Retry to create a viewer session for the | |
1244 | * requested session name. | |
1245 | */ | |
1246 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
d24d5663 | 1247 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1248 | goto no_session; |
1249 | } | |
1250 | } | |
1251 | } | |
1252 | ||
1253 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1254 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * Here the muxing of message is done. | |
1259 | * | |
1260 | * We need to iterate over all the streams of all the traces of all the | |
1261 | * viewer sessions in order to get the message with the smallest | |
1262 | * timestamp. In this case, a session is a viewer session and there is | |
1263 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1264 | * kernel). Each viewer session can have multiple traces, for example, | |
1265 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1266 | * | |
1267 | * We iterate over the streams of each traces to update and see what is | |
1268 | * their next message's timestamp. From those timestamps, we select the | |
1269 | * message with the smallest timestamp as the best candidate message | |
1270 | * for that trace and do the same thing across all the sessions. | |
1271 | * | |
1272 | * We then compare the timestamp of best candidate message of all the | |
1273 | * sessions to pick the message with the smallest timestamp and we | |
1274 | * return it. | |
1275 | */ | |
1276 | while (*count < capacity) { | |
a31f4d8b FD |
1277 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1278 | *candidate_stream_iter = NULL; | |
1279 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 | 1280 | |
98b15851 | 1281 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
14f28187 | 1282 | session_idx = 0; |
14f28187 FD |
1283 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1284 | struct lttng_live_session *session = | |
1285 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1286 | session_idx); | |
1287 | ||
1288 | /* Find the best candidate message to send downstream. */ | |
1289 | stream_iter_status = next_stream_iterator_for_session( | |
1290 | lttng_live_msg_iter, session, | |
1291 | &candidate_stream_iter); | |
1292 | ||
1293 | /* If we receive an END status, it means that either: | |
1294 | * - Those traces never had active streams (UST with no | |
1295 | * data produced yet), | |
1296 | * - All live stream iterators have ENDed.*/ | |
1297 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1298 | if (session->closed && session->traces->len == 0) { | |
1299 | /* | |
7d632b96 JG |
1300 | * Remove the session from the list. |
1301 | * session_idx is not modified since | |
1302 | * g_ptr_array_remove_index_fast | |
1303 | * replaces the the removed element with | |
1304 | * the array's last element. | |
14f28187 FD |
1305 | */ |
1306 | g_ptr_array_remove_index_fast( | |
1307 | lttng_live_msg_iter->sessions, | |
1308 | session_idx); | |
14f28187 FD |
1309 | } else { |
1310 | session_idx++; | |
1311 | } | |
1312 | continue; | |
1313 | } | |
1314 | ||
1315 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1316 | goto end; | |
1317 | } | |
1318 | ||
a31f4d8b | 1319 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1320 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1321 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1322 | youngest_stream_iter = candidate_stream_iter; | |
1323 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1324 | /* |
1325 | * The currently selected message to be sent | |
1326 | * downstream next has the exact same timestamp | |
1327 | * that of the current candidate message. We | |
1328 | * must break the tie in a predictable manner. | |
1329 | */ | |
1330 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1331 | /* | |
1332 | * Order the messages in an arbitrary but | |
07afb6bc | 1333 | * deterministic way. |
376fc2bd | 1334 | */ |
07afb6bc FD |
1335 | int ret = common_muxing_compare_messages( |
1336 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1337 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1338 | if (ret < 0) { |
1339 | /* | |
1340 | * The `candidate_stream_iter->current_msg` | |
1341 | * should go first. Update the next | |
1342 | * iterator and the current timestamp. | |
1343 | */ | |
a31f4d8b FD |
1344 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1345 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1346 | } else if (ret == 0) { |
1347 | /* Unable to pick which one should go first. */ | |
1348 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1349 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1350 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1351 | } |
14f28187 FD |
1352 | } |
1353 | ||
1354 | session_idx++; | |
1355 | } | |
1356 | ||
a31f4d8b | 1357 | if (!youngest_stream_iter) { |
14f28187 FD |
1358 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1359 | goto end; | |
1360 | } | |
1361 | ||
98b15851 | 1362 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
14f28187 | 1363 | /* Ensure monotonicity. */ |
98b15851 | 1364 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
a31f4d8b | 1365 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1366 | |
1367 | /* | |
1368 | * Insert the next message to the message batch. This will set | |
1369 | * stream iterator current messsage to NULL so that next time | |
1370 | * we fetch the next message of that stream iterator | |
1371 | */ | |
a31f4d8b | 1372 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1373 | (*count)++; |
1374 | ||
1375 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1376 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1377 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1378 | |
1379 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1380 | } | |
1381 | end: | |
1382 | switch (stream_iter_status) { | |
1383 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1384 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1385 | if (*count > 0) { | |
1386 | /* | |
1387 | * We received a again status but we have some messages | |
1388 | * to send downstream. We send them and return OK for | |
1389 | * now. On the next call we return again if there are | |
1390 | * still no new message to send. | |
1391 | */ | |
d24d5663 | 1392 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
14f28187 | 1393 | } else { |
d24d5663 | 1394 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1395 | } |
7cdc2bab | 1396 | break; |
14f28187 | 1397 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
d24d5663 | 1398 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1399 | break; |
14f28187 | 1400 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
d24d5663 | 1401 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1402 | break; |
1403 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1404 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1405 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
d24d5663 | 1406 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1407 | /* Put all existing messages on error. */ |
1408 | put_messages(msgs, *count); | |
7cdc2bab | 1409 | break; |
14f28187 FD |
1410 | default: |
1411 | abort(); | |
7cdc2bab | 1412 | } |
14f28187 FD |
1413 | |
1414 | no_session: | |
1415 | return status; | |
7cdc2bab | 1416 | } |
41a2b7ae | 1417 | |
7cdc2bab | 1418 | BT_HIDDEN |
21a9f056 | 1419 | bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init( |
14f28187 | 1420 | bt_self_message_iterator *self_msg_it, |
8d8b141d | 1421 | bt_self_message_iterator_configuration *config, |
14f28187 FD |
1422 | bt_self_component_source *self_comp_src, |
1423 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1424 | { |
21a9f056 FD |
1425 | bt_component_class_message_iterator_initialize_method_status ret = |
1426 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK; | |
14f28187 | 1427 | bt_self_component *self_comp = |
d24d5663 | 1428 | bt_self_component_source_as_self_component(self_comp_src); |
14f28187 FD |
1429 | struct lttng_live_component *lttng_live; |
1430 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
c01594de | 1431 | bt_logging_level log_level; |
14f28187 FD |
1432 | |
1433 | BT_ASSERT(self_msg_it); | |
1434 | ||
1435 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1436 | log_level = lttng_live->log_level; |
2ece7dd0 | 1437 | self_comp = lttng_live->self_comp; |
14f28187 FD |
1438 | |
1439 | /* There can be only one downstream iterator at the same time. */ | |
1440 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1441 | lttng_live->has_msg_iter = true; | |
1442 | ||
1443 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1444 | if (!lttng_live_msg_iter) { | |
21a9f056 | 1445 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1446 | goto end; |
7cdc2bab | 1447 | } |
14f28187 | 1448 | |
c01594de | 1449 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
2ece7dd0 | 1450 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
14f28187 FD |
1451 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1452 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1453 | ||
1454 | lttng_live_msg_iter->active_stream_iter = 0; | |
1455 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1456 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1457 | (GDestroyNotify) lttng_live_destroy_session); | |
1458 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1459 | ||
1460 | lttng_live_msg_iter->viewer_connection = | |
1461 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
550004b4 | 1462 | lttng_live_msg_iter, log_level); |
14f28187 FD |
1463 | if (!lttng_live_msg_iter->viewer_connection) { |
1464 | goto error; | |
1465 | } | |
1466 | ||
1467 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1468 | goto error; | |
1469 | } | |
1470 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1471 | switch (lttng_live->params.sess_not_found_act) { | |
1472 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
2ece7dd0 | 1473 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1474 | "session. Keep trying to connect because of " |
1475 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1476 | SESS_NOT_FOUND_ACTION_PARAM, | |
1477 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1478 | lttng_live->params.url->str); | |
1479 | break; | |
1480 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
2ece7dd0 | 1481 | BT_COMP_LOGE("Unable to connect to the requested live viewer " |
14f28187 FD |
1482 | "session. Fail the message iterator" |
1483 | "initialization because of %s=\"%s\" " | |
1484 | "component parameter: url =\"%s\"", | |
1485 | SESS_NOT_FOUND_ACTION_PARAM, | |
1486 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1487 | lttng_live->params.url->str); | |
7cdc2bab | 1488 | goto error; |
14f28187 | 1489 | case SESSION_NOT_FOUND_ACTION_END: |
2ece7dd0 | 1490 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1491 | "session. End gracefully at the first _next() " |
1492 | "call because of %s=\"%s\" component parameter: " | |
1493 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1494 | SESS_NOT_FOUND_ACTION_END_STR, | |
1495 | lttng_live->params.url->str); | |
1496 | break; | |
bce81ff2 | 1497 | default: |
80aff5ef | 1498 | abort(); |
7cdc2bab | 1499 | } |
7cdc2bab MD |
1500 | } |
1501 | ||
14f28187 FD |
1502 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1503 | ||
1504 | goto end; | |
1505 | error: | |
21a9f056 | 1506 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1507 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1508 | end: |
41a2b7ae | 1509 | return ret; |
7cdc2bab MD |
1510 | } |
1511 | ||
80aff5ef SM |
1512 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1513 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1514 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1515 | }; | |
1516 | ||
7cdc2bab | 1517 | static |
d24d5663 PP |
1518 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1519 | const bt_value *params, const bt_value **result, | |
80aff5ef | 1520 | bt_self_component_class *self_comp_class, |
d24d5663 | 1521 | bt_logging_level log_level) |
7cdc2bab | 1522 | { |
80aff5ef | 1523 | bt_component_class_query_method_status status; |
14f28187 | 1524 | const bt_value *url_value = NULL; |
7cdc2bab | 1525 | const char *url; |
14f28187 | 1526 | struct live_viewer_connection *viewer_connection = NULL; |
80aff5ef SM |
1527 | enum bt_param_validation_status validation_status; |
1528 | gchar *validate_error = NULL; | |
7cdc2bab | 1529 | |
80aff5ef SM |
1530 | validation_status = bt_param_validation_validate(params, |
1531 | list_sessions_params, &validate_error); | |
1532 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1533 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1534 | goto error; |
80aff5ef | 1535 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
a635e507 | 1536 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
80aff5ef | 1537 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", validate_error); |
7cdc2bab MD |
1538 | goto error; |
1539 | } | |
1540 | ||
80aff5ef | 1541 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
14f28187 FD |
1542 | url = bt_value_string_get(url_value); |
1543 | ||
550004b4 PP |
1544 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
1545 | log_level); | |
7cdc2bab | 1546 | if (!viewer_connection) { |
80aff5ef | 1547 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1548 | goto error; |
1549 | } | |
1550 | ||
14f28187 | 1551 | status = live_viewer_connection_list_sessions(viewer_connection, |
80aff5ef | 1552 | result); |
d24d5663 | 1553 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
c7eee084 PP |
1554 | goto error; |
1555 | } | |
1556 | ||
7cdc2bab | 1557 | goto end; |
c7eee084 | 1558 | |
7cdc2bab | 1559 | error: |
14f28187 | 1560 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1561 | |
14f28187 | 1562 | if (status >= 0) { |
d24d5663 | 1563 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1564 | } |
1565 | ||
7cdc2bab MD |
1566 | end: |
1567 | if (viewer_connection) { | |
14f28187 | 1568 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1569 | } |
80aff5ef SM |
1570 | |
1571 | g_free(validate_error); | |
1572 | ||
14f28187 | 1573 | return status; |
7cdc2bab MD |
1574 | } |
1575 | ||
312df793 PP |
1576 | static |
1577 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1578 | const bt_value *params, const bt_value **result, | |
1579 | bt_logging_level log_level) | |
1580 | { | |
1581 | bt_component_class_query_method_status status = | |
1582 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1583 | const bt_value *input_type_value; | |
1584 | const bt_value *input_value; | |
1585 | double weight = 0; | |
1586 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1587 | ||
1588 | /* Used by the logging macros */ | |
1589 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1590 | ||
1591 | *result = NULL; | |
1592 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1593 | "type"); | |
1594 | if (!input_type_value) { | |
1595 | BT_COMP_LOGE("Missing expected `type` parameter."); | |
1596 | goto error; | |
1597 | } | |
1598 | ||
1599 | if (!bt_value_is_string(input_type_value)) { | |
1600 | BT_COMP_LOGE("`type` parameter is not a string value."); | |
1601 | goto error; | |
1602 | } | |
1603 | ||
1604 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1605 | /* We don't handle file system paths */ | |
1606 | goto create_result; | |
1607 | } | |
1608 | ||
1609 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1610 | if (!input_value) { | |
1611 | BT_COMP_LOGE("Missing expected `input` parameter."); | |
1612 | goto error; | |
1613 | } | |
1614 | ||
1615 | if (!bt_value_is_string(input_value)) { | |
1616 | BT_COMP_LOGE("`input` parameter is not a string value."); | |
1617 | goto error; | |
1618 | } | |
1619 | ||
1620 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1621 | NULL, 0); | |
1622 | if (parts.session_name) { | |
1623 | /* | |
1624 | * Looks pretty much like an LTTng live URL: we got the | |
1625 | * session name part, which forms a complete URL. | |
1626 | */ | |
1627 | weight = .75; | |
1628 | } | |
1629 | ||
1630 | create_result: | |
1631 | *result = bt_value_real_create_init(weight); | |
1632 | if (!*result) { | |
1633 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1634 | goto error; | |
1635 | } | |
1636 | ||
1637 | goto end; | |
1638 | ||
1639 | error: | |
1640 | if (status >= 0) { | |
1641 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1642 | } | |
1643 | ||
1644 | BT_ASSERT(!*result); | |
1645 | ||
1646 | end: | |
1647 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1648 | return status; | |
1649 | } | |
1650 | ||
7cdc2bab | 1651 | BT_HIDDEN |
d24d5663 PP |
1652 | bt_component_class_query_method_status lttng_live_query( |
1653 | bt_self_component_class_source *comp_class, | |
3c729b9a | 1654 | bt_private_query_executor *priv_query_exec, |
14f28187 | 1655 | const char *object, const bt_value *params, |
7c14d641 | 1656 | __attribute__((unused)) void *method_data, |
3c729b9a | 1657 | const bt_value **result) |
7cdc2bab | 1658 | { |
d24d5663 PP |
1659 | bt_component_class_query_method_status status = |
1660 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 1661 | bt_self_component *self_comp = NULL; |
80aff5ef SM |
1662 | bt_self_component_class *self_comp_class = |
1663 | bt_self_component_class_source_as_self_component_class(comp_class); | |
3c729b9a PP |
1664 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1665 | bt_private_query_executor_as_query_executor_const( | |
1666 | priv_query_exec)); | |
c7eee084 | 1667 | |
7cdc2bab | 1668 | if (strcmp(object, "sessions") == 0) { |
c01594de | 1669 | status = lttng_live_query_list_sessions(params, result, |
80aff5ef | 1670 | self_comp_class, log_level); |
312df793 PP |
1671 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1672 | status = lttng_live_query_support_info(params, result, | |
1673 | log_level); | |
14f28187 | 1674 | } else { |
32a09ecd | 1675 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 1676 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 1677 | goto end; |
7cdc2bab | 1678 | } |
14f28187 FD |
1679 | |
1680 | end: | |
1681 | return status; | |
7cdc2bab MD |
1682 | } |
1683 | ||
1684 | static | |
1685 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1686 | { | |
19bdff20 FD |
1687 | if (!lttng_live) { |
1688 | return; | |
1689 | } | |
14f28187 FD |
1690 | if (lttng_live->params.url) { |
1691 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1692 | } |
1693 | g_free(lttng_live); | |
1694 | } | |
1695 | ||
1696 | BT_HIDDEN | |
14f28187 | 1697 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1698 | { |
14f28187 | 1699 | void *data = bt_self_component_get_data( |
0f1979c3 | 1700 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
1701 | |
1702 | if (!data) { | |
1703 | return; | |
1704 | } | |
1705 | lttng_live_component_destroy_data(data); | |
1706 | } | |
1707 | ||
1708 | static | |
14f28187 FD |
1709 | enum session_not_found_action parse_session_not_found_action_param( |
1710 | const bt_value *no_session_param) | |
1711 | { | |
1712 | enum session_not_found_action action; | |
80aff5ef SM |
1713 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
1714 | ||
14f28187 FD |
1715 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
1716 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1717 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1718 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
14f28187 | 1719 | } else { |
80aff5ef SM |
1720 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
1721 | action = SESSION_NOT_FOUND_ACTION_END; | |
14f28187 FD |
1722 | } |
1723 | ||
1724 | return action; | |
1725 | } | |
1726 | ||
80aff5ef SM |
1727 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
1728 | .type = BT_VALUE_TYPE_STRING, | |
1729 | }; | |
1730 | ||
1731 | static const char *sess_not_found_action_choices[] = { | |
1732 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1733 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1734 | SESS_NOT_FOUND_ACTION_END_STR, | |
1735 | }; | |
1736 | ||
1737 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
1738 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
1739 | .min_length = 1, | |
1740 | .max_length = 1, | |
1741 | .element_type = &inputs_elem_descr, | |
1742 | } } }, | |
1743 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
1744 | .choices = sess_not_found_action_choices, | |
1745 | } } }, | |
1746 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1747 | }; | |
1748 | ||
70384700 | 1749 | static |
80aff5ef SM |
1750 | bt_component_class_initialize_method_status lttng_live_component_create( |
1751 | const bt_value *params, | |
1752 | bt_logging_level log_level, | |
1753 | bt_self_component *self_comp, | |
1754 | struct lttng_live_component **component) | |
7cdc2bab | 1755 | { |
80aff5ef | 1756 | struct lttng_live_component *lttng_live = NULL; |
312df793 PP |
1757 | const bt_value *inputs_value; |
1758 | const bt_value *url_value; | |
1759 | const bt_value *value; | |
7cdc2bab | 1760 | const char *url; |
80aff5ef SM |
1761 | enum bt_param_validation_status validation_status; |
1762 | gchar *validation_error = NULL; | |
1763 | bt_component_class_initialize_method_status status; | |
1764 | ||
1765 | validation_status = bt_param_validation_validate(params, params_descr, | |
1766 | &validation_error); | |
1767 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1768 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
1769 | goto error; | |
1770 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
1771 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
1772 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
1773 | goto error; | |
1774 | } | |
7cdc2bab MD |
1775 | |
1776 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1777 | if (!lttng_live) { | |
80aff5ef | 1778 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1779 | goto end; |
1780 | } | |
c01594de | 1781 | lttng_live->log_level = log_level; |
2ece7dd0 | 1782 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1783 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
1784 | lttng_live->has_msg_iter = false; |
1785 | ||
80aff5ef SM |
1786 | inputs_value = |
1787 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
1788 | url_value = | |
1789 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
312df793 | 1790 | url = bt_value_string_get(url_value); |
80aff5ef | 1791 | |
14f28187 FD |
1792 | lttng_live->params.url = g_string_new(url); |
1793 | if (!lttng_live->params.url) { | |
80aff5ef | 1794 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1795 | goto error; |
1796 | } | |
14f28187 FD |
1797 | |
1798 | value = bt_value_map_borrow_entry_value_const(params, | |
1799 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 | 1800 | if (value) { |
14f28187 FD |
1801 | lttng_live->params.sess_not_found_act = |
1802 | parse_session_not_found_action_param(value); | |
14f28187 | 1803 | } else { |
312df793 PP |
1804 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1805 | "defaulting to `%s`.", | |
14f28187 FD |
1806 | SESS_NOT_FOUND_ACTION_PARAM, |
1807 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1808 | lttng_live->params.sess_not_found_act = | |
1809 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1810 | } |
4c66436f | 1811 | |
80aff5ef | 1812 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
1813 | goto end; |
1814 | ||
1815 | error: | |
1816 | lttng_live_component_destroy_data(lttng_live); | |
1817 | lttng_live = NULL; | |
1818 | end: | |
80aff5ef SM |
1819 | g_free(validation_error); |
1820 | ||
1821 | *component = lttng_live; | |
1822 | return status; | |
d3e4dcd8 PP |
1823 | } |
1824 | ||
f3bc2010 | 1825 | BT_HIDDEN |
21a9f056 | 1826 | bt_component_class_initialize_method_status lttng_live_component_init( |
c01594de | 1827 | bt_self_component_source *self_comp_src, |
59225a3e SM |
1828 | bt_self_component_source_configuration *config, |
1829 | const bt_value *params, | |
1830 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1831 | { |
7cdc2bab | 1832 | struct lttng_live_component *lttng_live; |
80aff5ef | 1833 | bt_component_class_initialize_method_status ret; |
c01594de PP |
1834 | bt_self_component *self_comp = |
1835 | bt_self_component_source_as_self_component(self_comp_src); | |
1836 | bt_logging_level log_level = bt_component_get_logging_level( | |
1837 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 1838 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1839 | |
80aff5ef SM |
1840 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
1841 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
19bdff20 | 1842 | goto error; |
7cdc2bab MD |
1843 | } |
1844 | ||
d24d5663 PP |
1845 | add_port_status = bt_self_component_source_add_output_port( |
1846 | self_comp_src, "out", NULL, NULL); | |
80aff5ef SM |
1847 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
1848 | ret = (int) add_port_status; | |
1849 | goto end; | |
147337a3 | 1850 | } |
7cdc2bab | 1851 | |
c01594de | 1852 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 1853 | goto end; |
7cdc2bab | 1854 | |
19bdff20 FD |
1855 | error: |
1856 | lttng_live_component_destroy_data(lttng_live); | |
1857 | lttng_live = NULL; | |
7cdc2bab MD |
1858 | end: |
1859 | return ret; | |
d85ef162 | 1860 | } |