Commit | Line | Data |
---|---|---|
f3bc2010 JG |
1 | /* |
2 | * lttng-live.c | |
3 | * | |
4 | * Babeltrace CTF LTTng-live Client Component | |
5 | * | |
bb18709b | 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 | ||
5278d5ba | 31 | #define BT_COMP_LOG_SELF_COMP self_comp |
1c0ceb65 | 32 | #define BT_LOG_OUTPUT_LEVEL log_level |
b03487ab | 33 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE" |
3fa1b6a3 | 34 | #include "logging/comp-logging.h" |
020bc26f | 35 | |
bb18709b FD |
36 | #include <glib.h> |
37 | #include <inttypes.h> | |
969c1d8a | 38 | #include <stdbool.h> |
bb18709b FD |
39 | #include <unistd.h> |
40 | ||
57952005 | 41 | #include "common/assert.h" |
71c5da58 | 42 | #include <babeltrace2/babeltrace.h> |
57952005 | 43 | #include "compat/compiler.h" |
71c5da58 | 44 | #include <babeltrace2/types.h> |
f3bc2010 | 45 | |
eb8cbb9e | 46 | #include "plugins/common/muxing/muxing.h" |
a0df3abf | 47 | #include "plugins/common/param-validation/param-validation.h" |
eb8cbb9e | 48 | |
7cdc2bab MD |
49 | #include "data-stream.h" |
50 | #include "metadata.h" | |
bb18709b | 51 | #include "lttng-live.h" |
7cdc2bab | 52 | |
bb18709b FD |
53 | #define MAX_QUERY_SIZE (256*1024) |
54 | #define URL_PARAM "url" | |
90fda045 | 55 | #define INPUTS_PARAM "inputs" |
bb18709b 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 | |
5278d5ba | 61 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 62 | |
bb18709b 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 | |
bb18709b FD |
107 | #define print_stream_state(live_stream_iter) \ |
108 | do { \ | |
5278d5ba | 109 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
bb18709b 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 | |
d73bb381 | 117 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 118 | { |
bb18709b | 119 | bool ret; |
6f79a7cf | 120 | |
d73bb381 | 121 | if (!msg_iter) { |
bb18709b FD |
122 | ret = false; |
123 | goto end; | |
7cdc2bab | 124 | } |
7cdc2bab | 125 | |
d73bb381 PP |
126 | ret = bt_self_message_iterator_is_interrupted( |
127 | msg_iter->self_msg_iter); | |
4bf0e537 | 128 | |
bb18709b 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 | { |
bb18709b FD |
137 | uint64_t trace_idx; |
138 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 139 | |
bb18709b 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) { |
bb18709b FD |
144 | ret_trace = trace; |
145 | goto end; | |
7cdc2bab MD |
146 | } |
147 | } | |
bb18709b FD |
148 | |
149 | end: | |
150 | return ret_trace; | |
d3eb6e8f PP |
151 | } |
152 | ||
7cdc2bab | 153 | static |
bb18709b | 154 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 155 | { |
1c0ceb65 | 156 | bt_logging_level log_level = trace->log_level; |
5278d5ba | 157 | bt_self_component *self_comp = trace->self_comp; |
1c0ceb65 | 158 | |
5278d5ba | 159 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 160 | |
bb18709b FD |
161 | BT_ASSERT(trace->stream_iterators); |
162 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 163 | |
bb18709b 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; | |
1c0ceb65 | 176 | bt_logging_level log_level = session->log_level; |
5278d5ba | 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 | } | |
1c0ceb65 | 183 | trace->log_level = session->log_level; |
5278d5ba | 184 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
185 | trace->session = session; |
186 | trace->id = trace_id; | |
bb18709b FD |
187 | trace->trace_class = NULL; |
188 | trace->trace = NULL; | |
189 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0b6986b4 | 190 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
bb18709b | 191 | BT_ASSERT(trace->stream_iterators); |
7cdc2bab | 192 | trace->new_metadata_needed = true; |
bb18709b FD |
193 | g_ptr_array_add(session->traces, trace); |
194 | ||
5278d5ba | 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 | |
bb18709b 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) { | |
bb18709b | 212 | goto end; |
7cdc2bab | 213 | } |
7cdc2bab | 214 | |
bb18709b FD |
215 | /* The session is the owner of the newly created trace. */ |
216 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 217 | |
bb18709b FD |
218 | end: |
219 | return trace; | |
7cdc2bab MD |
220 | } |
221 | ||
222 | BT_HIDDEN | |
bb18709b | 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; | |
bb18709b | 228 | struct lttng_live_session *session; |
1c0ceb65 | 229 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 230 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 231 | |
bb18709b FD |
232 | session = g_new0(struct lttng_live_session, 1); |
233 | if (!session) { | |
7cdc2bab MD |
234 | goto error; |
235 | } | |
236 | ||
1c0ceb65 | 237 | session->log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 238 | session->self_comp = lttng_live_msg_iter->self_comp; |
bb18709b FD |
239 | session->id = session_id; |
240 | session->traces = g_ptr_array_new_with_free_func( | |
0b6986b4 | 241 | (GDestroyNotify) lttng_live_destroy_trace); |
bb18709b 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 | |
5278d5ba | 251 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
bb18709b 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: | |
5278d5ba | 256 | BT_COMP_LOGE("Error adding session"); |
bb18709b | 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 | { | |
1c0ceb65 | 266 | bt_logging_level log_level; |
5278d5ba | 267 | bt_self_component *self_comp; |
bb18709b FD |
268 | |
269 | if (!session) { | |
270 | goto end; | |
271 | } | |
7cdc2bab | 272 | |
1c0ceb65 | 273 | log_level = session->log_level; |
5278d5ba 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)) { | |
4c5287b9 FD |
278 | if (!lttng_live_graph_is_canceled( |
279 | session->lttng_live_msg_iter)) { | |
4c66436f | 280 | /* Old relayd cannot detach sessions. */ |
5278d5ba | 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 | } | |
bb18709b FD |
287 | |
288 | if (session->traces) { | |
289 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 290 | } |
bb18709b | 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); |
bb18709b FD |
299 | |
300 | end: | |
301 | return; | |
7cdc2bab MD |
302 | } |
303 | ||
bb18709b FD |
304 | static |
305 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 306 | { |
bb18709b FD |
307 | if (!lttng_live_msg_iter) { |
308 | goto end; | |
7cdc2bab | 309 | } |
7cdc2bab | 310 | |
bb18709b FD |
311 | if (lttng_live_msg_iter->sessions) { |
312 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 313 | } |
bb18709b 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 | |
bb18709b | 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 | { | |
1c0ceb65 | 345 | bt_logging_level log_level = lttng_live_stream->log_level; |
5278d5ba | 346 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
1c0ceb65 | 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. */ | |
5278d5ba | 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. */ | |
5278d5ba | 358 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
087bc060 | 359 | abort(); |
7cdc2bab MD |
360 | case LTTNG_LIVE_STREAM_EOF: |
361 | break; | |
362 | } | |
bb18709b | 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 | |
bb18709b 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 | { | |
1c0ceb65 | 379 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 380 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0b6986b4 | 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; |
0b6986b4 | 383 | struct packet_index index; |
7cdc2bab MD |
384 | |
385 | if (lttng_live_stream->trace->new_metadata_needed) { | |
bb18709b | 386 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
387 | goto end; |
388 | } | |
389 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
bb18709b | 390 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
391 | goto end; |
392 | } | |
bb18709b 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 | } | |
bb18709b 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 | } | |
ec4a3354 | 402 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 403 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
bb18709b 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 { | |
bb18709b | 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: | |
bb18709b 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 | /* | |
bb18709b 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 | |
bb18709b 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 | { | |
bb18709b FD |
438 | enum lttng_live_iterator_status status; |
439 | uint64_t trace_idx; | |
440 | int ret = 0; | |
7cdc2bab | 441 | |
bb18709b FD |
442 | if (!session->attached) { |
443 | ret = lttng_live_attach_session(session); | |
444 | if (ret) { | |
4c5287b9 | 445 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
bb18709b 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 | } |
bb18709b | 453 | |
7cdc2bab | 454 | status = lttng_live_get_new_streams(session); |
bb18709b FD |
455 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
456 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
457 | goto end; | |
7cdc2bab | 458 | } |
f797424a FD |
459 | trace_idx = 0; |
460 | while (trace_idx < session->traces->len) { | |
bb18709b FD |
461 | struct lttng_live_trace *trace = |
462 | g_ptr_array_index(session->traces, trace_idx); | |
463 | ||
7cdc2bab | 464 | status = lttng_live_metadata_update(trace); |
f797424a FD |
465 | switch (status) { |
466 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
467 | trace_idx++; | |
468 | break; | |
469 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
470 | /* | |
471 | * The trace has ended. Remove it of the array an | |
472 | * continue the iteration. | |
473 | * We can remove the trace safely when using the | |
474 | * g_ptr_array_remove_index_fast because it replaces | |
475 | * the element at trace_idx with the array's last | |
476 | * element. trace_idx is not incremented because of | |
477 | * that. | |
478 | */ | |
479 | (void) g_ptr_array_remove_index_fast(session->traces, | |
480 | trace_idx); | |
481 | break; | |
482 | default: | |
bb18709b | 483 | goto end; |
7cdc2bab MD |
484 | } |
485 | } | |
bb18709b FD |
486 | status = lttng_live_lazy_msg_init(session); |
487 | ||
488 | end: | |
489 | return status; | |
7cdc2bab MD |
490 | } |
491 | ||
492 | BT_HIDDEN | |
bb18709b | 493 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 494 | { |
bb18709b | 495 | uint64_t session_idx; |
7cdc2bab | 496 | |
bb18709b FD |
497 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
498 | session_idx++) { | |
499 | struct lttng_live_session *session = | |
500 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
501 | session->new_streams_needed = true; |
502 | } | |
503 | } | |
504 | ||
505 | static | |
bb18709b | 506 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 507 | { |
bb18709b | 508 | uint64_t session_idx, trace_idx; |
7cdc2bab | 509 | |
bb18709b FD |
510 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
511 | session_idx++) { | |
512 | struct lttng_live_session *session = | |
513 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 514 | session->new_streams_needed = true; |
bb18709b FD |
515 | for (trace_idx = 0; trace_idx < session->traces->len; |
516 | trace_idx++) { | |
517 | struct lttng_live_trace *trace = | |
518 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
519 | trace->new_metadata_needed = true; |
520 | } | |
521 | } | |
522 | } | |
523 | ||
524 | static | |
bb18709b FD |
525 | enum lttng_live_iterator_status |
526 | lttng_live_iterator_handle_new_streams_and_metadata( | |
527 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 528 | { |
0b6986b4 | 529 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
bb18709b FD |
530 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
531 | struct lttng_live_session *session; | |
532 | enum session_not_found_action sess_not_found_act = | |
533 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
534 | ||
7cdc2bab | 535 | /* |
bb18709b | 536 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
537 | * session" flag to the protocol, which would tell us that we |
538 | * need to query for new sessions even though we have sessions | |
539 | * currently ongoing. | |
540 | */ | |
bb18709b FD |
541 | if (lttng_live_msg_iter->sessions->len == 0) { |
542 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
543 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
544 | goto end; | |
545 | } else { | |
546 | /* | |
547 | * Retry to create a viewer session for the requested | |
548 | * session name. | |
549 | */ | |
550 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
551 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
552 | goto end; | |
553 | } | |
554 | } | |
7cdc2bab | 555 | } |
bb18709b FD |
556 | |
557 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
558 | session_idx++) { | |
559 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
560 | session_idx); | |
561 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 562 | switch (ret) { |
bb18709b | 563 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 564 | break; |
bb18709b FD |
565 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
566 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
567 | break; |
568 | default: | |
569 | goto end; | |
570 | } | |
571 | if (!session->closed) { | |
572 | nr_sessions_opened++; | |
573 | } | |
574 | } | |
575 | end: | |
bb18709b FD |
576 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
577 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
578 | nr_sessions_opened == 0) { | |
579 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
580 | } |
581 | return ret; | |
582 | } | |
583 | ||
584 | static | |
bb18709b FD |
585 | enum lttng_live_iterator_status emit_inactivity_message( |
586 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
587 | struct lttng_live_stream_iterator *stream_iter, | |
588 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 589 | { |
0b6986b4 | 590 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
bb18709b | 591 | bt_message *msg = NULL; |
7cdc2bab | 592 | |
bb18709b FD |
593 | BT_ASSERT(stream_iter->trace->clock_class); |
594 | ||
595 | msg = bt_message_message_iterator_inactivity_create( | |
0b6986b4 FD |
596 | lttng_live_msg_iter->self_msg_iter, |
597 | stream_iter->trace->clock_class, timestamp); | |
b09a5592 | 598 | if (!msg) { |
7cdc2bab MD |
599 | goto error; |
600 | } | |
bb18709b | 601 | |
b09a5592 | 602 | *message = msg; |
7cdc2bab | 603 | end: |
7cdc2bab MD |
604 | return ret; |
605 | ||
606 | error: | |
bb18709b | 607 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
b09a5592 | 608 | bt_message_put_ref(msg); |
7cdc2bab MD |
609 | goto end; |
610 | } | |
611 | ||
612 | static | |
bb18709b FD |
613 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
614 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 615 | struct lttng_live_stream_iterator *lttng_live_stream, |
bb18709b | 616 | bt_message **message) |
7cdc2bab | 617 | { |
0b6986b4 | 618 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
619 | |
620 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
bb18709b | 621 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
622 | } |
623 | ||
bb18709b FD |
624 | if (lttng_live_stream->current_inactivity_ts == |
625 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 626 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
bb18709b FD |
627 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
628 | goto end; | |
629 | } | |
630 | ||
631 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0b6986b4 | 632 | message, lttng_live_stream->current_inactivity_ts); |
bb18709b FD |
633 | |
634 | lttng_live_stream->last_inactivity_ts = | |
0b6986b4 | 635 | lttng_live_stream->current_inactivity_ts; |
bb18709b FD |
636 | end: |
637 | return ret; | |
638 | } | |
639 | ||
640 | static | |
641 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
642 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
643 | const bt_message *msg, int64_t last_msg_ts_ns, | |
644 | int64_t *ts_ns) | |
645 | { | |
646 | const bt_clock_class *clock_class = NULL; | |
647 | const bt_clock_snapshot *clock_snapshot = NULL; | |
648 | int ret = 0; | |
1c0ceb65 | 649 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 650 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
bb18709b | 651 | |
ec4a3354 PP |
652 | BT_ASSERT_DBG(msg); |
653 | BT_ASSERT_DBG(ts_ns); | |
bb18709b | 654 | |
5278d5ba | 655 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
bb18709b FD |
656 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
657 | last_msg_ts_ns); | |
658 | ||
659 | switch (bt_message_get_type(msg)) { | |
660 | case BT_MESSAGE_TYPE_EVENT: | |
0b6986b4 | 661 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
bb18709b | 662 | msg); |
ec4a3354 | 663 | BT_ASSERT_DBG(clock_class); |
bb18709b | 664 | |
11ddb3ef PP |
665 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
666 | msg); | |
bb18709b FD |
667 | break; |
668 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0b6986b4 | 669 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
670 | msg); |
671 | BT_ASSERT(clock_class); | |
672 | ||
11ddb3ef PP |
673 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
674 | msg); | |
bb18709b FD |
675 | break; |
676 | case BT_MESSAGE_TYPE_PACKET_END: | |
0b6986b4 | 677 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
678 | msg); |
679 | BT_ASSERT(clock_class); | |
680 | ||
11ddb3ef PP |
681 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
682 | msg); | |
bb18709b FD |
683 | break; |
684 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0b6986b4 | 685 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
686 | msg); |
687 | BT_ASSERT(clock_class); | |
688 | ||
5ef34326 | 689 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
11ddb3ef | 690 | msg); |
bb18709b FD |
691 | break; |
692 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0b6986b4 | 693 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
694 | msg); |
695 | BT_ASSERT(clock_class); | |
696 | ||
5ef34326 | 697 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
11ddb3ef | 698 | msg); |
bb18709b | 699 | break; |
bb18709b | 700 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0b6986b4 FD |
701 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
702 | msg); | |
bb18709b FD |
703 | break; |
704 | default: | |
705 | /* All the other messages have a higher priority */ | |
5278d5ba | 706 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
bb18709b | 707 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
708 | goto end; |
709 | } | |
710 | ||
bb18709b | 711 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
ec4a3354 | 712 | BT_ASSERT_DBG(clock_class); |
bb18709b FD |
713 | |
714 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
715 | if (ret) { | |
5278d5ba | 716 | BT_COMP_LOGE("Cannot get nanoseconds from Epoch of clock snapshot: " |
bb18709b FD |
717 | "clock-snapshot-addr=%p", clock_snapshot); |
718 | goto error; | |
719 | } | |
720 | ||
721 | goto end; | |
722 | ||
bb18709b FD |
723 | error: |
724 | ret = -1; | |
7cdc2bab | 725 | |
7cdc2bab | 726 | end: |
bb18709b | 727 | if (ret == 0) { |
5278d5ba | 728 | BT_COMP_LOGD("Found message's timestamp: " |
bb18709b FD |
729 | "iter-data-addr=%p, msg-addr=%p, " |
730 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
731 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
732 | } | |
733 | ||
7cdc2bab MD |
734 | return ret; |
735 | } | |
736 | ||
737 | static | |
bb18709b FD |
738 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
739 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 740 | struct lttng_live_stream_iterator *lttng_live_stream, |
bb18709b | 741 | bt_message **message) |
7cdc2bab | 742 | { |
bb18709b | 743 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1c0ceb65 | 744 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 745 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0b6986b4 FD |
746 | enum bt_msg_iter_status status; |
747 | uint64_t session_idx, trace_idx; | |
7cdc2bab | 748 | |
bb18709b FD |
749 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
750 | session_idx++) { | |
751 | struct lttng_live_session *session = | |
752 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
753 | |
754 | if (session->new_streams_needed) { | |
bb18709b FD |
755 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
756 | goto end; | |
7cdc2bab | 757 | } |
bb18709b FD |
758 | for (trace_idx = 0; trace_idx < session->traces->len; |
759 | trace_idx++) { | |
760 | struct lttng_live_trace *trace = | |
761 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 762 | if (trace->new_metadata_needed) { |
bb18709b FD |
763 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
764 | goto end; | |
7cdc2bab MD |
765 | } |
766 | } | |
767 | } | |
768 | ||
769 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
bb18709b FD |
770 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
771 | goto end; | |
7cdc2bab | 772 | } |
bb18709b FD |
773 | |
774 | status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter, | |
775 | lttng_live_msg_iter->self_msg_iter, message); | |
7cdc2bab | 776 | switch (status) { |
b09a5592 | 777 | case BT_MSG_ITER_STATUS_EOF: |
bb18709b | 778 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 779 | break; |
b09a5592 | 780 | case BT_MSG_ITER_STATUS_OK: |
bb18709b | 781 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 782 | break; |
b09a5592 | 783 | case BT_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
784 | /* |
785 | * Continue immediately (end of packet). The next | |
786 | * get_index may return AGAIN to delay the following | |
787 | * attempt. | |
788 | */ | |
bb18709b | 789 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 790 | break; |
b09a5592 | 791 | case BT_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 792 | /* No argument provided by the user, so don't return INVAL. */ |
b09a5592 | 793 | case BT_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 794 | default: |
bb18709b | 795 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
5278d5ba | 796 | BT_COMP_LOGW("CTF msg iterator return an error or failed msg_iter=%p", |
bb18709b | 797 | lttng_live_stream->msg_iter); |
7cdc2bab MD |
798 | break; |
799 | } | |
bb18709b FD |
800 | |
801 | end: | |
7cdc2bab MD |
802 | return ret; |
803 | } | |
804 | ||
5b337d32 FD |
805 | static |
806 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
807 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
808 | struct lttng_live_stream_iterator *stream_iter, | |
809 | bt_message **curr_msg) | |
810 | { | |
811 | enum lttng_live_iterator_status live_status = | |
812 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
813 | /* | |
814 | * The viewer has hung up on us so we are closing the stream. The | |
815 | * `bt_msg_iter` should simply realize that it needs to close the | |
816 | * stream properly by emitting the necessary stream end message. | |
817 | */ | |
0b6986b4 FD |
818 | enum bt_msg_iter_status status = bt_msg_iter_get_next_message( |
819 | stream_iter->msg_iter, lttng_live_msg_iter->self_msg_iter, | |
820 | curr_msg); | |
5b337d32 FD |
821 | |
822 | if (status == BT_MSG_ITER_STATUS_ERROR) { | |
823 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
824 | goto end; | |
825 | } | |
826 | ||
827 | BT_ASSERT(status == BT_MSG_ITER_STATUS_OK); | |
828 | ||
829 | end: | |
830 | return live_status; | |
831 | } | |
832 | ||
7cdc2bab MD |
833 | /* |
834 | * helper function: | |
835 | * handle_no_data_streams() | |
836 | * retry: | |
837 | * - for each ACTIVE_NO_DATA stream: | |
838 | * - query relayd for stream data, or quiescence info. | |
839 | * - if need metadata, get metadata, goto retry. | |
840 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
841 | * - if quiescent, move to QUIESCENT streams | |
842 | * - if fetched data, move to ACTIVE_DATA streams | |
843 | * (at this point each stream either has data, or is quiescent) | |
844 | * | |
845 | * | |
846 | * iterator_next: | |
847 | * handle_new_streams_and_metadata() | |
848 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
849 | * - query relayd for metadata | |
850 | * | |
851 | * call handle_active_no_data_streams() | |
852 | * | |
853 | * handle_quiescent_streams() | |
854 | * - if at least one stream is ACTIVE_DATA: | |
855 | * - peek stream event with lowest timestamp -> next_ts | |
856 | * - for each quiescent stream | |
857 | * - if next_ts >= quiescent end | |
858 | * - set state to ACTIVE_NO_DATA | |
859 | * - else | |
860 | * - for each quiescent stream | |
861 | * - set state to ACTIVE_NO_DATA | |
862 | * | |
863 | * call handle_active_no_data_streams() | |
864 | * | |
865 | * handle_active_data_streams() | |
866 | * - if at least one stream is ACTIVE_DATA: | |
867 | * - get stream event with lowest timestamp from heap | |
b09a5592 | 868 | * - make that stream event the current message. |
7cdc2bab MD |
869 | * - move this stream heap position to its next event |
870 | * - if we need to fetch data from relayd, move | |
871 | * stream to ACTIVE_NO_DATA. | |
872 | * - return OK | |
873 | * - return AGAIN | |
874 | * | |
875 | * end criterion: ctrl-c on client. If relayd exits or the session | |
876 | * closes on the relay daemon side, we keep on waiting for streams. | |
877 | * Eventually handle --end timestamp (also an end criterion). | |
878 | * | |
879 | * When disconnected from relayd: try to re-connect endlessly. | |
880 | */ | |
881 | static | |
4990894b | 882 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
bb18709b FD |
883 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
884 | struct lttng_live_stream_iterator *stream_iter, | |
885 | bt_message **curr_msg) | |
7cdc2bab | 886 | { |
1c0ceb65 | 887 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 888 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
bb18709b | 889 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 890 | |
5b337d32 FD |
891 | if (stream_iter->has_stream_hung_up) { |
892 | /* | |
893 | * The stream has hung up and the stream was properly closed | |
894 | * during the last call to the current function. Return _END | |
895 | * status now so that this stream iterator is removed for the | |
896 | * stream iterator list. | |
897 | */ | |
898 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
899 | goto end; | |
900 | } | |
901 | ||
7cdc2bab MD |
902 | retry: |
903 | print_stream_state(stream_iter); | |
bb18709b | 904 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0b6986b4 | 905 | lttng_live_msg_iter); |
bb18709b | 906 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
907 | goto end; |
908 | } | |
bb18709b | 909 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0b6986b4 | 910 | lttng_live_msg_iter, stream_iter); |
5b337d32 | 911 | |
bb18709b | 912 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5b337d32 FD |
913 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
914 | /* | |
915 | * We overwrite `live_status` since `curr_msg` is | |
916 | * likely set to a valid message in this function. | |
917 | */ | |
918 | live_status = lttng_live_iterator_close_stream( | |
919 | lttng_live_msg_iter, stream_iter, curr_msg); | |
920 | } | |
7cdc2bab MD |
921 | goto end; |
922 | } | |
bb18709b | 923 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0b6986b4 | 924 | lttng_live_msg_iter, stream_iter, curr_msg); |
bb18709b | 925 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
8e01f2d9 | 926 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
927 | goto end; |
928 | } | |
bb18709b | 929 | if (*curr_msg) { |
7cdc2bab MD |
930 | goto end; |
931 | } | |
bb18709b | 932 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0b6986b4 | 933 | lttng_live_msg_iter, stream_iter, curr_msg); |
bb18709b | 934 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
8e01f2d9 | 935 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
936 | } |
937 | ||
938 | end: | |
bb18709b | 939 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 940 | goto retry; |
7cdc2bab | 941 | } |
bb18709b FD |
942 | |
943 | return live_status; | |
7cdc2bab MD |
944 | } |
945 | ||
946 | static | |
bb18709b FD |
947 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
948 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
949 | struct lttng_live_trace *live_trace, | |
4990894b | 950 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 951 | { |
4990894b | 952 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0b6986b4 FD |
953 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
954 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
bb18709b | 955 | enum lttng_live_iterator_status stream_iter_status;; |
4990894b | 956 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
bb18709b | 957 | uint64_t stream_iter_idx; |
7cdc2bab | 958 | |
ec4a3354 PP |
959 | BT_ASSERT_DBG(live_trace); |
960 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
bb18709b FD |
961 | /* |
962 | * Update the current message of every stream iterators of this trace. | |
963 | * The current msg of every stream must have a timestamp equal or | |
964 | * larger than the last message returned by this iterator. We must | |
965 | * ensure monotonicity. | |
966 | */ | |
967 | stream_iter_idx = 0; | |
968 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
969 | bool stream_iter_is_ended = false; | |
970 | struct lttng_live_stream_iterator *stream_iter = | |
971 | g_ptr_array_index(live_trace->stream_iterators, | |
0b6986b4 | 972 | stream_iter_idx); |
bb18709b FD |
973 | |
974 | /* | |
975 | * Find if there is are now current message for this stream | |
976 | * iterator get it. | |
977 | */ | |
978 | while (!stream_iter->current_msg) { | |
979 | bt_message *msg = NULL; | |
980 | int64_t curr_msg_ts_ns = INT64_MAX; | |
4990894b | 981 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0b6986b4 | 982 | lttng_live_msg_iter, stream_iter, &msg); |
bb18709b | 983 | |
5278d5ba | 984 | BT_COMP_LOGD("live stream iterator returned status :%s", |
0b6986b4 | 985 | print_live_iterator_status(stream_iter_status)); |
bb18709b FD |
986 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
987 | stream_iter_is_ended = true; | |
988 | break; | |
989 | } | |
990 | ||
991 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
992 | goto end; | |
993 | } | |
994 | ||
ec4a3354 | 995 | BT_ASSERT_DBG(msg); |
bb18709b FD |
996 | |
997 | /* | |
998 | * Get the timestamp in nanoseconds from origin of this | |
999 | * messsage. | |
1000 | */ | |
1001 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1002 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1003 | &curr_msg_ts_ns); | |
1004 | ||
1005 | /* | |
1006 | * Check if the message of the current live stream | |
1007 | * iterator occured at the exact same time or after the | |
1008 | * last message returned by this component's message | |
1009 | * iterator. If not, we return an error. | |
1010 | */ | |
1011 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1012 | stream_iter->current_msg = msg; | |
1013 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
1014 | } else { | |
1015 | /* | |
1016 | * We received a message in the past. To ensure | |
1017 | * monotonicity, we can't send it forward. | |
1018 | */ | |
5278d5ba | 1019 | BT_COMP_LOGE("Message's timestamp is less than " |
bb18709b FD |
1020 | "lttng-live's message iterator's last " |
1021 | "returned timestamp: " | |
1022 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1023 | "last-msg-ts=%" PRId64, | |
1024 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1025 | lttng_live_msg_iter->last_msg_ts_ns); | |
1026 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1027 | goto end; | |
1028 | } | |
1029 | } | |
1030 | ||
ec4a3354 | 1031 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
51c1eaeb FD |
1032 | |
1033 | if (!stream_iter_is_ended) { | |
4990894b FD |
1034 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1035 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
51c1eaeb FD |
1036 | /* |
1037 | * Update the current best candidate message | |
1038 | * for the stream iterator of this live trace | |
1039 | * to be forwarded downstream. | |
1040 | */ | |
4990894b FD |
1041 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1042 | youngest_candidate_stream_iter = stream_iter; | |
1043 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
51c1eaeb FD |
1044 | /* |
1045 | * Order the messages in an arbitrary but | |
1046 | * deterministic way. | |
1047 | */ | |
ec4a3354 | 1048 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
51c1eaeb FD |
1049 | int ret = common_muxing_compare_messages( |
1050 | stream_iter->current_msg, | |
4990894b | 1051 | youngest_candidate_stream_iter->current_msg); |
51c1eaeb FD |
1052 | if (ret < 0) { |
1053 | /* | |
4990894b | 1054 | * The `youngest_candidate_stream_iter->current_msg` |
51c1eaeb FD |
1055 | * should go first. Update the next |
1056 | * iterator and the current timestamp. | |
1057 | */ | |
4990894b FD |
1058 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1059 | youngest_candidate_stream_iter = stream_iter; | |
51c1eaeb FD |
1060 | } else if (ret == 0) { |
1061 | /* | |
1062 | * Unable to pick which one should go | |
1063 | * first. | |
1064 | */ | |
1065 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1066 | "stream-iter-addr=%p" | |
1067 | "stream-iter-addr=%p", | |
1068 | stream_iter, | |
4990894b | 1069 | youngest_candidate_stream_iter); |
51c1eaeb FD |
1070 | } |
1071 | } | |
bb18709b | 1072 | |
51c1eaeb FD |
1073 | stream_iter_idx++; |
1074 | } else { | |
bb18709b | 1075 | /* |
e469e550 JG |
1076 | * The live stream iterator has ended. That |
1077 | * iterator is removed from the array, but | |
1078 | * there is no need to increment | |
1079 | * stream_iter_idx as | |
1080 | * g_ptr_array_remove_index_fast replaces the | |
1081 | * removed element with the array's last | |
1082 | * element. | |
bb18709b | 1083 | */ |
e469e550 JG |
1084 | g_ptr_array_remove_index_fast( |
1085 | live_trace->stream_iterators, | |
bb18709b | 1086 | stream_iter_idx); |
bb18709b FD |
1087 | } |
1088 | } | |
1089 | ||
4990894b FD |
1090 | if (youngest_candidate_stream_iter) { |
1091 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
bb18709b FD |
1092 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1093 | } else { | |
1094 | /* | |
1095 | * The only case where we don't have a candidate for this trace | |
1096 | * is if we reached the end of all the iterators. | |
1097 | */ | |
1098 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1099 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1100 | } | |
1101 | ||
1102 | end: | |
1103 | return stream_iter_status; | |
1104 | } | |
1105 | ||
1106 | static | |
1107 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1108 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1109 | struct lttng_live_session *session, | |
4990894b | 1110 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
bb18709b | 1111 | { |
51c1eaeb FD |
1112 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1113 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
bb18709b FD |
1114 | enum lttng_live_iterator_status stream_iter_status; |
1115 | uint64_t trace_idx = 0; | |
4990894b FD |
1116 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1117 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
bb18709b FD |
1118 | |
1119 | /* | |
1120 | * Make sure we are attached to the session and look for new streams | |
1121 | * and metadata. | |
1122 | */ | |
1123 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1124 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1125 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1126 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1127 | goto end; |
1128 | } | |
bb18709b | 1129 | |
ec4a3354 | 1130 | BT_ASSERT_DBG(session->traces); |
bb18709b | 1131 | |
bb18709b FD |
1132 | while (trace_idx < session->traces->len) { |
1133 | bool trace_is_ended = false; | |
1134 | struct lttng_live_stream_iterator *stream_iter; | |
1135 | struct lttng_live_trace *trace = | |
1136 | g_ptr_array_index(session->traces, trace_idx); | |
1137 | ||
1138 | stream_iter_status = next_stream_iterator_for_trace( | |
1139 | lttng_live_msg_iter, trace, &stream_iter); | |
1140 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1141 | /* | |
1142 | * All the live stream iterators for this trace are | |
1143 | * ENDed. Remove the trace from this session. | |
1144 | */ | |
1145 | trace_is_ended = true; | |
1146 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1147 | goto end; | |
1148 | } | |
1149 | ||
1150 | if (!trace_is_ended) { | |
ec4a3354 | 1151 | BT_ASSERT_DBG(stream_iter); |
bb18709b | 1152 | |
4990894b FD |
1153 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1154 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1155 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1156 | youngest_candidate_stream_iter = stream_iter; | |
1157 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
51c1eaeb FD |
1158 | /* |
1159 | * Order the messages in an arbitrary but | |
1160 | * deterministic way. | |
1161 | */ | |
1162 | int ret = common_muxing_compare_messages( | |
1163 | stream_iter->current_msg, | |
4990894b | 1164 | youngest_candidate_stream_iter->current_msg); |
51c1eaeb FD |
1165 | if (ret < 0) { |
1166 | /* | |
4990894b | 1167 | * The `youngest_candidate_stream_iter->current_msg` |
51c1eaeb FD |
1168 | * should go first. Update the next iterator |
1169 | * and the current timestamp. | |
1170 | */ | |
4990894b FD |
1171 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1172 | youngest_candidate_stream_iter = stream_iter; | |
51c1eaeb FD |
1173 | } else if (ret == 0) { |
1174 | /* Unable to pick which one should go first. */ | |
1175 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1176 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
4990894b | 1177 | stream_iter, youngest_candidate_stream_iter); |
51c1eaeb | 1178 | } |
bb18709b FD |
1179 | } |
1180 | trace_idx++; | |
1181 | } else { | |
61c935bb JG |
1182 | /* |
1183 | * trace_idx is not incremented since | |
1184 | * g_ptr_array_remove_index_fast replaces the | |
1185 | * element at trace_idx with the array's last element. | |
1186 | */ | |
1187 | g_ptr_array_remove_index_fast(session->traces, | |
1188 | trace_idx); | |
bb18709b FD |
1189 | } |
1190 | } | |
4990894b FD |
1191 | if (youngest_candidate_stream_iter) { |
1192 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
bb18709b | 1193 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1194 | } else { |
bb18709b FD |
1195 | /* |
1196 | * The only cases where we don't have a candidate for this | |
1197 | * trace is: | |
1198 | * 1. if we reached the end of all the iterators of all the | |
1199 | * traces of this session, | |
1200 | * 2. if we never had live stream iterator in the first place. | |
1201 | * | |
1202 | * In either cases, we return END. | |
1203 | */ | |
1204 | BT_ASSERT(session->traces->len == 0); | |
1205 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1206 | } |
1207 | end: | |
bb18709b FD |
1208 | return stream_iter_status; |
1209 | } | |
1210 | ||
1211 | static inline | |
1212 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1213 | { | |
1214 | uint64_t i; | |
1215 | ||
1216 | for (i = 0; i < count; i++) { | |
1217 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1218 | } |
7cdc2bab MD |
1219 | } |
1220 | ||
d3eb6e8f | 1221 | BT_HIDDEN |
fb25b9e3 | 1222 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
bb18709b FD |
1223 | bt_self_message_iterator *self_msg_it, |
1224 | bt_message_array_const msgs, uint64_t capacity, | |
1225 | uint64_t *count) | |
d3eb6e8f | 1226 | { |
fb25b9e3 | 1227 | bt_component_class_message_iterator_next_method_status status; |
bb18709b FD |
1228 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1229 | bt_self_message_iterator_get_data(self_msg_it); | |
1230 | struct lttng_live_component *lttng_live = | |
1231 | lttng_live_msg_iter->lttng_live_comp; | |
eb8cbb9e FD |
1232 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1233 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
bb18709b FD |
1234 | enum lttng_live_iterator_status stream_iter_status; |
1235 | uint64_t session_idx; | |
1236 | ||
1237 | *count = 0; | |
1238 | ||
ec4a3354 | 1239 | BT_ASSERT_DBG(lttng_live_msg_iter); |
bb18709b FD |
1240 | |
1241 | /* | |
1242 | * Clear all the invalid message reference that might be left over in | |
1243 | * the output array. | |
1244 | */ | |
1245 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1246 | ||
1247 | /* | |
1248 | * If no session are exposed on the relay found at the url provided by | |
1249 | * the user, session count will be 0. In this case, we return status | |
1250 | * end to return gracefully. | |
1251 | */ | |
1252 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1253 | if (lttng_live->params.sess_not_found_act != | |
1254 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
fb25b9e3 | 1255 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
bb18709b FD |
1256 | goto no_session; |
1257 | } else { | |
1258 | /* | |
1259 | * The are no more active session for this session | |
1260 | * name. Retry to create a viewer session for the | |
1261 | * requested session name. | |
1262 | */ | |
1263 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
fb25b9e3 | 1264 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
bb18709b FD |
1265 | goto no_session; |
1266 | } | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1271 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * Here the muxing of message is done. | |
1276 | * | |
1277 | * We need to iterate over all the streams of all the traces of all the | |
1278 | * viewer sessions in order to get the message with the smallest | |
1279 | * timestamp. In this case, a session is a viewer session and there is | |
1280 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1281 | * kernel). Each viewer session can have multiple traces, for example, | |
1282 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1283 | * | |
1284 | * We iterate over the streams of each traces to update and see what is | |
1285 | * their next message's timestamp. From those timestamps, we select the | |
1286 | * message with the smallest timestamp as the best candidate message | |
1287 | * for that trace and do the same thing across all the sessions. | |
1288 | * | |
1289 | * We then compare the timestamp of best candidate message of all the | |
1290 | * sessions to pick the message with the smallest timestamp and we | |
1291 | * return it. | |
1292 | */ | |
1293 | while (*count < capacity) { | |
4990894b FD |
1294 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1295 | *candidate_stream_iter = NULL; | |
1296 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
bb18709b | 1297 | |
ec4a3354 | 1298 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
bb18709b | 1299 | session_idx = 0; |
bb18709b FD |
1300 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1301 | struct lttng_live_session *session = | |
1302 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1303 | session_idx); | |
1304 | ||
1305 | /* Find the best candidate message to send downstream. */ | |
1306 | stream_iter_status = next_stream_iterator_for_session( | |
1307 | lttng_live_msg_iter, session, | |
1308 | &candidate_stream_iter); | |
1309 | ||
1310 | /* If we receive an END status, it means that either: | |
1311 | * - Those traces never had active streams (UST with no | |
1312 | * data produced yet), | |
1313 | * - All live stream iterators have ENDed.*/ | |
1314 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1315 | if (session->closed && session->traces->len == 0) { | |
1316 | /* | |
961b4173 JG |
1317 | * Remove the session from the list. |
1318 | * session_idx is not modified since | |
1319 | * g_ptr_array_remove_index_fast | |
1320 | * replaces the the removed element with | |
1321 | * the array's last element. | |
bb18709b FD |
1322 | */ |
1323 | g_ptr_array_remove_index_fast( | |
1324 | lttng_live_msg_iter->sessions, | |
1325 | session_idx); | |
bb18709b FD |
1326 | } else { |
1327 | session_idx++; | |
1328 | } | |
1329 | continue; | |
1330 | } | |
1331 | ||
1332 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1333 | goto end; | |
1334 | } | |
1335 | ||
4990894b | 1336 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
06d0a058 | 1337 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
4990894b FD |
1338 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1339 | youngest_stream_iter = candidate_stream_iter; | |
1340 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
eb8cbb9e FD |
1341 | /* |
1342 | * The currently selected message to be sent | |
1343 | * downstream next has the exact same timestamp | |
1344 | * that of the current candidate message. We | |
1345 | * must break the tie in a predictable manner. | |
1346 | */ | |
1347 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1348 | /* | |
1349 | * Order the messages in an arbitrary but | |
51c1eaeb | 1350 | * deterministic way. |
eb8cbb9e | 1351 | */ |
51c1eaeb FD |
1352 | int ret = common_muxing_compare_messages( |
1353 | candidate_stream_iter->current_msg, | |
4990894b | 1354 | youngest_stream_iter->current_msg); |
eb8cbb9e FD |
1355 | if (ret < 0) { |
1356 | /* | |
1357 | * The `candidate_stream_iter->current_msg` | |
1358 | * should go first. Update the next | |
1359 | * iterator and the current timestamp. | |
1360 | */ | |
4990894b FD |
1361 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1362 | youngest_stream_iter = candidate_stream_iter; | |
eb8cbb9e FD |
1363 | } else if (ret == 0) { |
1364 | /* Unable to pick which one should go first. */ | |
1365 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1366 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
4990894b | 1367 | youngest_stream_iter, candidate_stream_iter); |
eb8cbb9e | 1368 | } |
bb18709b FD |
1369 | } |
1370 | ||
1371 | session_idx++; | |
1372 | } | |
1373 | ||
4990894b | 1374 | if (!youngest_stream_iter) { |
bb18709b FD |
1375 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1376 | goto end; | |
1377 | } | |
1378 | ||
ec4a3354 | 1379 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
bb18709b | 1380 | /* Ensure monotonicity. */ |
ec4a3354 | 1381 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
4990894b | 1382 | youngest_stream_iter->current_msg_ts_ns); |
bb18709b FD |
1383 | |
1384 | /* | |
1385 | * Insert the next message to the message batch. This will set | |
1386 | * stream iterator current messsage to NULL so that next time | |
1387 | * we fetch the next message of that stream iterator | |
1388 | */ | |
4990894b | 1389 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
bb18709b FD |
1390 | (*count)++; |
1391 | ||
1392 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
4990894b FD |
1393 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1394 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
bb18709b FD |
1395 | |
1396 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1397 | } | |
1398 | end: | |
1399 | switch (stream_iter_status) { | |
1400 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1401 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1402 | if (*count > 0) { | |
1403 | /* | |
1404 | * We received a again status but we have some messages | |
1405 | * to send downstream. We send them and return OK for | |
1406 | * now. On the next call we return again if there are | |
1407 | * still no new message to send. | |
1408 | */ | |
fb25b9e3 | 1409 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
bb18709b | 1410 | } else { |
fb25b9e3 | 1411 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
bb18709b | 1412 | } |
7cdc2bab | 1413 | break; |
bb18709b | 1414 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
fb25b9e3 | 1415 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1416 | break; |
bb18709b | 1417 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
fb25b9e3 | 1418 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
bb18709b FD |
1419 | break; |
1420 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1421 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1422 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
fb25b9e3 | 1423 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
bb18709b FD |
1424 | /* Put all existing messages on error. */ |
1425 | put_messages(msgs, *count); | |
7cdc2bab | 1426 | break; |
bb18709b FD |
1427 | default: |
1428 | abort(); | |
7cdc2bab | 1429 | } |
bb18709b FD |
1430 | |
1431 | no_session: | |
1432 | return status; | |
7cdc2bab | 1433 | } |
41a2b7ae | 1434 | |
7cdc2bab | 1435 | BT_HIDDEN |
4175c1d5 | 1436 | bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init( |
bb18709b | 1437 | bt_self_message_iterator *self_msg_it, |
9415de1c | 1438 | bt_self_message_iterator_configuration *config, |
bb18709b FD |
1439 | bt_self_component_source *self_comp_src, |
1440 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1441 | { |
4175c1d5 FD |
1442 | bt_component_class_message_iterator_initialize_method_status ret = |
1443 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK; | |
bb18709b | 1444 | bt_self_component *self_comp = |
fb25b9e3 | 1445 | bt_self_component_source_as_self_component(self_comp_src); |
bb18709b FD |
1446 | struct lttng_live_component *lttng_live; |
1447 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
1c0ceb65 | 1448 | bt_logging_level log_level; |
bb18709b FD |
1449 | |
1450 | BT_ASSERT(self_msg_it); | |
1451 | ||
1452 | lttng_live = bt_self_component_get_data(self_comp); | |
1c0ceb65 | 1453 | log_level = lttng_live->log_level; |
5278d5ba | 1454 | self_comp = lttng_live->self_comp; |
bb18709b FD |
1455 | |
1456 | /* There can be only one downstream iterator at the same time. */ | |
1457 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1458 | lttng_live->has_msg_iter = true; | |
1459 | ||
1460 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1461 | if (!lttng_live_msg_iter) { | |
4175c1d5 | 1462 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
bb18709b | 1463 | goto end; |
7cdc2bab | 1464 | } |
bb18709b | 1465 | |
1c0ceb65 | 1466 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
5278d5ba | 1467 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
bb18709b FD |
1468 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1469 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1470 | ||
1471 | lttng_live_msg_iter->active_stream_iter = 0; | |
1472 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1473 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1474 | (GDestroyNotify) lttng_live_destroy_session); | |
1475 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1476 | ||
1477 | lttng_live_msg_iter->viewer_connection = | |
1478 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
ca06281d | 1479 | lttng_live_msg_iter, log_level); |
bb18709b FD |
1480 | if (!lttng_live_msg_iter->viewer_connection) { |
1481 | goto error; | |
1482 | } | |
1483 | ||
1484 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1485 | goto error; | |
1486 | } | |
1487 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1488 | switch (lttng_live->params.sess_not_found_act) { | |
1489 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
5278d5ba | 1490 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
bb18709b FD |
1491 | "session. Keep trying to connect because of " |
1492 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1493 | SESS_NOT_FOUND_ACTION_PARAM, | |
1494 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1495 | lttng_live->params.url->str); | |
1496 | break; | |
1497 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
5278d5ba | 1498 | BT_COMP_LOGE("Unable to connect to the requested live viewer " |
bb18709b FD |
1499 | "session. Fail the message iterator" |
1500 | "initialization because of %s=\"%s\" " | |
1501 | "component parameter: url =\"%s\"", | |
1502 | SESS_NOT_FOUND_ACTION_PARAM, | |
1503 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1504 | lttng_live->params.url->str); | |
7cdc2bab | 1505 | goto error; |
bb18709b | 1506 | case SESSION_NOT_FOUND_ACTION_END: |
5278d5ba | 1507 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
bb18709b FD |
1508 | "session. End gracefully at the first _next() " |
1509 | "call because of %s=\"%s\" component parameter: " | |
1510 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1511 | SESS_NOT_FOUND_ACTION_END_STR, | |
1512 | lttng_live->params.url->str); | |
1513 | break; | |
369d1e21 | 1514 | default: |
a0df3abf | 1515 | abort(); |
7cdc2bab | 1516 | } |
7cdc2bab MD |
1517 | } |
1518 | ||
bb18709b FD |
1519 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1520 | ||
1521 | goto end; | |
1522 | error: | |
4175c1d5 | 1523 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
bb18709b | 1524 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1525 | end: |
41a2b7ae | 1526 | return ret; |
7cdc2bab MD |
1527 | } |
1528 | ||
a0df3abf SM |
1529 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1530 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1531 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1532 | }; | |
1533 | ||
7cdc2bab | 1534 | static |
fb25b9e3 PP |
1535 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1536 | const bt_value *params, const bt_value **result, | |
a0df3abf | 1537 | bt_self_component_class *self_comp_class, |
fb25b9e3 | 1538 | bt_logging_level log_level) |
7cdc2bab | 1539 | { |
a0df3abf | 1540 | bt_component_class_query_method_status status; |
bb18709b | 1541 | const bt_value *url_value = NULL; |
7cdc2bab | 1542 | const char *url; |
bb18709b | 1543 | struct live_viewer_connection *viewer_connection = NULL; |
a0df3abf SM |
1544 | enum bt_param_validation_status validation_status; |
1545 | gchar *validate_error = NULL; | |
7cdc2bab | 1546 | |
a0df3abf SM |
1547 | validation_status = bt_param_validation_validate(params, |
1548 | list_sessions_params, &validate_error); | |
1549 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1550 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1551 | goto error; |
a0df3abf | 1552 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
574dea68 | 1553 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
a0df3abf | 1554 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", validate_error); |
7cdc2bab MD |
1555 | goto error; |
1556 | } | |
1557 | ||
a0df3abf | 1558 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
bb18709b FD |
1559 | url = bt_value_string_get(url_value); |
1560 | ||
ca06281d PP |
1561 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
1562 | log_level); | |
7cdc2bab | 1563 | if (!viewer_connection) { |
a0df3abf | 1564 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1565 | goto error; |
1566 | } | |
1567 | ||
bb18709b | 1568 | status = live_viewer_connection_list_sessions(viewer_connection, |
a0df3abf | 1569 | result); |
fb25b9e3 | 1570 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
1286dcbb PP |
1571 | goto error; |
1572 | } | |
1573 | ||
7cdc2bab | 1574 | goto end; |
1286dcbb | 1575 | |
7cdc2bab | 1576 | error: |
bb18709b | 1577 | BT_VALUE_PUT_REF_AND_RESET(*result); |
1286dcbb | 1578 | |
bb18709b | 1579 | if (status >= 0) { |
fb25b9e3 | 1580 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
1286dcbb PP |
1581 | } |
1582 | ||
7cdc2bab MD |
1583 | end: |
1584 | if (viewer_connection) { | |
bb18709b | 1585 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1586 | } |
a0df3abf SM |
1587 | |
1588 | g_free(validate_error); | |
1589 | ||
bb18709b | 1590 | return status; |
7cdc2bab MD |
1591 | } |
1592 | ||
90fda045 PP |
1593 | static |
1594 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1595 | const bt_value *params, const bt_value **result, | |
1596 | bt_logging_level log_level) | |
1597 | { | |
1598 | bt_component_class_query_method_status status = | |
1599 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1600 | const bt_value *input_type_value; | |
1601 | const bt_value *input_value; | |
1602 | double weight = 0; | |
1603 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1604 | ||
1605 | /* Used by the logging macros */ | |
1606 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1607 | ||
1608 | *result = NULL; | |
1609 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1610 | "type"); | |
1611 | if (!input_type_value) { | |
1612 | BT_COMP_LOGE("Missing expected `type` parameter."); | |
1613 | goto error; | |
1614 | } | |
1615 | ||
1616 | if (!bt_value_is_string(input_type_value)) { | |
1617 | BT_COMP_LOGE("`type` parameter is not a string value."); | |
1618 | goto error; | |
1619 | } | |
1620 | ||
1621 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1622 | /* We don't handle file system paths */ | |
1623 | goto create_result; | |
1624 | } | |
1625 | ||
1626 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1627 | if (!input_value) { | |
1628 | BT_COMP_LOGE("Missing expected `input` parameter."); | |
1629 | goto error; | |
1630 | } | |
1631 | ||
1632 | if (!bt_value_is_string(input_value)) { | |
1633 | BT_COMP_LOGE("`input` parameter is not a string value."); | |
1634 | goto error; | |
1635 | } | |
1636 | ||
1637 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1638 | NULL, 0); | |
1639 | if (parts.session_name) { | |
1640 | /* | |
1641 | * Looks pretty much like an LTTng live URL: we got the | |
1642 | * session name part, which forms a complete URL. | |
1643 | */ | |
1644 | weight = .75; | |
1645 | } | |
1646 | ||
1647 | create_result: | |
1648 | *result = bt_value_real_create_init(weight); | |
1649 | if (!*result) { | |
1650 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1651 | goto error; | |
1652 | } | |
1653 | ||
1654 | goto end; | |
1655 | ||
1656 | error: | |
1657 | if (status >= 0) { | |
1658 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1659 | } | |
1660 | ||
1661 | BT_ASSERT(!*result); | |
1662 | ||
1663 | end: | |
1664 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1665 | return status; | |
1666 | } | |
1667 | ||
7cdc2bab | 1668 | BT_HIDDEN |
fb25b9e3 PP |
1669 | bt_component_class_query_method_status lttng_live_query( |
1670 | bt_self_component_class_source *comp_class, | |
bf403eb2 | 1671 | bt_private_query_executor *priv_query_exec, |
bb18709b | 1672 | const char *object, const bt_value *params, |
f6e305ce | 1673 | __attribute__((unused)) void *method_data, |
bf403eb2 | 1674 | const bt_value **result) |
7cdc2bab | 1675 | { |
fb25b9e3 PP |
1676 | bt_component_class_query_method_status status = |
1677 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
5278d5ba | 1678 | bt_self_component *self_comp = NULL; |
a0df3abf SM |
1679 | bt_self_component_class *self_comp_class = |
1680 | bt_self_component_class_source_as_self_component_class(comp_class); | |
bf403eb2 PP |
1681 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1682 | bt_private_query_executor_as_query_executor_const( | |
1683 | priv_query_exec)); | |
1286dcbb | 1684 | |
7cdc2bab | 1685 | if (strcmp(object, "sessions") == 0) { |
1c0ceb65 | 1686 | status = lttng_live_query_list_sessions(params, result, |
a0df3abf | 1687 | self_comp_class, log_level); |
90fda045 PP |
1688 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1689 | status = lttng_live_query_support_info(params, result, | |
1690 | log_level); | |
bb18709b | 1691 | } else { |
287eb741 | 1692 | BT_COMP_LOGI("Unknown query object `%s`", object); |
7dd3e712 | 1693 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
bb18709b | 1694 | goto end; |
7cdc2bab | 1695 | } |
bb18709b FD |
1696 | |
1697 | end: | |
1698 | return status; | |
7cdc2bab MD |
1699 | } |
1700 | ||
1701 | static | |
1702 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1703 | { | |
059e3940 FD |
1704 | if (!lttng_live) { |
1705 | return; | |
1706 | } | |
bb18709b FD |
1707 | if (lttng_live->params.url) { |
1708 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1709 | } |
1710 | g_free(lttng_live); | |
1711 | } | |
1712 | ||
1713 | BT_HIDDEN | |
bb18709b | 1714 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1715 | { |
bb18709b | 1716 | void *data = bt_self_component_get_data( |
0b6986b4 | 1717 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
1718 | |
1719 | if (!data) { | |
1720 | return; | |
1721 | } | |
1722 | lttng_live_component_destroy_data(data); | |
1723 | } | |
1724 | ||
1725 | static | |
bb18709b FD |
1726 | enum session_not_found_action parse_session_not_found_action_param( |
1727 | const bt_value *no_session_param) | |
1728 | { | |
1729 | enum session_not_found_action action; | |
a0df3abf SM |
1730 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
1731 | ||
bb18709b FD |
1732 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
1733 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1734 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1735 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
bb18709b | 1736 | } else { |
a0df3abf SM |
1737 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
1738 | action = SESSION_NOT_FOUND_ACTION_END; | |
bb18709b FD |
1739 | } |
1740 | ||
1741 | return action; | |
1742 | } | |
1743 | ||
a0df3abf SM |
1744 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
1745 | .type = BT_VALUE_TYPE_STRING, | |
1746 | }; | |
1747 | ||
1748 | static const char *sess_not_found_action_choices[] = { | |
1749 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1750 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1751 | SESS_NOT_FOUND_ACTION_END_STR, | |
1752 | }; | |
1753 | ||
1754 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
1755 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
1756 | .min_length = 1, | |
1757 | .max_length = 1, | |
1758 | .element_type = &inputs_elem_descr, | |
1759 | } } }, | |
1760 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
1761 | .choices = sess_not_found_action_choices, | |
1762 | } } }, | |
1763 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1764 | }; | |
1765 | ||
9e660428 | 1766 | static |
a0df3abf SM |
1767 | bt_component_class_initialize_method_status lttng_live_component_create( |
1768 | const bt_value *params, | |
1769 | bt_logging_level log_level, | |
1770 | bt_self_component *self_comp, | |
1771 | struct lttng_live_component **component) | |
7cdc2bab | 1772 | { |
a0df3abf | 1773 | struct lttng_live_component *lttng_live = NULL; |
90fda045 PP |
1774 | const bt_value *inputs_value; |
1775 | const bt_value *url_value; | |
1776 | const bt_value *value; | |
7cdc2bab | 1777 | const char *url; |
a0df3abf SM |
1778 | enum bt_param_validation_status validation_status; |
1779 | gchar *validation_error = NULL; | |
1780 | bt_component_class_initialize_method_status status; | |
1781 | ||
1782 | validation_status = bt_param_validation_validate(params, params_descr, | |
1783 | &validation_error); | |
1784 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1785 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
1786 | goto error; | |
1787 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
1788 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
1789 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
1790 | goto error; | |
1791 | } | |
7cdc2bab MD |
1792 | |
1793 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1794 | if (!lttng_live) { | |
a0df3abf | 1795 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1796 | goto end; |
1797 | } | |
1c0ceb65 | 1798 | lttng_live->log_level = log_level; |
5278d5ba | 1799 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1800 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
bb18709b FD |
1801 | lttng_live->has_msg_iter = false; |
1802 | ||
a0df3abf SM |
1803 | inputs_value = |
1804 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
1805 | url_value = | |
1806 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
90fda045 | 1807 | url = bt_value_string_get(url_value); |
a0df3abf | 1808 | |
bb18709b FD |
1809 | lttng_live->params.url = g_string_new(url); |
1810 | if (!lttng_live->params.url) { | |
a0df3abf | 1811 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1812 | goto error; |
1813 | } | |
bb18709b FD |
1814 | |
1815 | value = bt_value_map_borrow_entry_value_const(params, | |
1816 | SESS_NOT_FOUND_ACTION_PARAM); | |
90fda045 | 1817 | if (value) { |
bb18709b FD |
1818 | lttng_live->params.sess_not_found_act = |
1819 | parse_session_not_found_action_param(value); | |
bb18709b | 1820 | } else { |
90fda045 PP |
1821 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1822 | "defaulting to `%s`.", | |
bb18709b FD |
1823 | SESS_NOT_FOUND_ACTION_PARAM, |
1824 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1825 | lttng_live->params.sess_not_found_act = | |
1826 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1827 | } |
4c66436f | 1828 | |
a0df3abf | 1829 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
1830 | goto end; |
1831 | ||
1832 | error: | |
1833 | lttng_live_component_destroy_data(lttng_live); | |
1834 | lttng_live = NULL; | |
1835 | end: | |
a0df3abf SM |
1836 | g_free(validation_error); |
1837 | ||
1838 | *component = lttng_live; | |
1839 | return status; | |
d3e4dcd8 PP |
1840 | } |
1841 | ||
f3bc2010 | 1842 | BT_HIDDEN |
4175c1d5 | 1843 | bt_component_class_initialize_method_status lttng_live_component_init( |
1c0ceb65 | 1844 | bt_self_component_source *self_comp_src, |
e3250e61 SM |
1845 | bt_self_component_source_configuration *config, |
1846 | const bt_value *params, | |
1847 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1848 | { |
7cdc2bab | 1849 | struct lttng_live_component *lttng_live; |
a0df3abf | 1850 | bt_component_class_initialize_method_status ret; |
1c0ceb65 PP |
1851 | bt_self_component *self_comp = |
1852 | bt_self_component_source_as_self_component(self_comp_src); | |
1853 | bt_logging_level log_level = bt_component_get_logging_level( | |
1854 | bt_self_component_as_component(self_comp)); | |
fb25b9e3 | 1855 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1856 | |
a0df3abf SM |
1857 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
1858 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
059e3940 | 1859 | goto error; |
7cdc2bab MD |
1860 | } |
1861 | ||
fb25b9e3 PP |
1862 | add_port_status = bt_self_component_source_add_output_port( |
1863 | self_comp_src, "out", NULL, NULL); | |
a0df3abf SM |
1864 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
1865 | ret = (int) add_port_status; | |
1866 | goto end; | |
147337a3 | 1867 | } |
7cdc2bab | 1868 | |
1c0ceb65 | 1869 | bt_self_component_set_data(self_comp, lttng_live); |
059e3940 | 1870 | goto end; |
7cdc2bab | 1871 | |
059e3940 FD |
1872 | error: |
1873 | lttng_live_component_destroy_data(lttng_live); | |
1874 | lttng_live = NULL; | |
7cdc2bab MD |
1875 | end: |
1876 | return ret; | |
d85ef162 | 1877 | } |