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 | 36 | #include <inttypes.h> |
969c1d8a | 37 | #include <stdbool.h> |
bb18709b FD |
38 | #include <unistd.h> |
39 | ||
28fb42b4 FD |
40 | #include <glib.h> |
41 | ||
57952005 | 42 | #include "common/assert.h" |
71c5da58 | 43 | #include <babeltrace2/babeltrace.h> |
57952005 | 44 | #include "compat/compiler.h" |
71c5da58 | 45 | #include <babeltrace2/types.h> |
f3bc2010 | 46 | |
eb8cbb9e | 47 | #include "plugins/common/muxing/muxing.h" |
a0df3abf | 48 | #include "plugins/common/param-validation/param-validation.h" |
eb8cbb9e | 49 | |
7cdc2bab MD |
50 | #include "data-stream.h" |
51 | #include "metadata.h" | |
bb18709b | 52 | #include "lttng-live.h" |
7cdc2bab | 53 | |
bb18709b FD |
54 | #define MAX_QUERY_SIZE (256*1024) |
55 | #define URL_PARAM "url" | |
90fda045 | 56 | #define INPUTS_PARAM "inputs" |
bb18709b FD |
57 | #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action" |
58 | #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue" | |
59 | #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail" | |
60 | #define SESS_NOT_FOUND_ACTION_END_STR "end" | |
7cdc2bab | 61 | |
5278d5ba | 62 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 63 | |
bb18709b FD |
64 | static |
65 | const char *print_live_iterator_status(enum lttng_live_iterator_status status) | |
66 | { | |
67 | switch (status) { | |
68 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
69 | return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE"; | |
70 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
71 | return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN"; | |
72 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
73 | return "LTTNG_LIVE_ITERATOR_STATUS_END"; | |
74 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
75 | return "LTTNG_LIVE_ITERATOR_STATUS_OK"; | |
76 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
77 | return "LTTNG_LIVE_ITERATOR_STATUS_INVAL"; | |
78 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
79 | return "LTTNG_LIVE_ITERATOR_STATUS_ERROR"; | |
80 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
81 | return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM"; | |
82 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
83 | return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED"; | |
84 | default: | |
24847fc7 | 85 | bt_common_abort(); |
bb18709b FD |
86 | } |
87 | } | |
88 | ||
89 | static | |
90 | const char *print_state(struct lttng_live_stream_iterator *s) | |
7cdc2bab MD |
91 | { |
92 | switch (s->state) { | |
93 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
94 | return "ACTIVE_NO_DATA"; | |
95 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
96 | return "QUIESCENT_NO_DATA"; | |
97 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
98 | return "QUIESCENT"; | |
99 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
100 | return "ACTIVE_DATA"; | |
101 | case LTTNG_LIVE_STREAM_EOF: | |
102 | return "EOF"; | |
103 | default: | |
104 | return "ERROR"; | |
105 | } | |
106 | } | |
7cdc2bab | 107 | |
bb18709b FD |
108 | #define print_stream_state(live_stream_iter) \ |
109 | do { \ | |
5278d5ba | 110 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
bb18709b FD |
111 | ", curr_inact_ts %" PRId64, \ |
112 | print_state(live_stream_iter), \ | |
113 | live_stream_iter->last_inactivity_ts, \ | |
114 | live_stream_iter->current_inactivity_ts); \ | |
115 | } while (0); | |
6f79a7cf MD |
116 | |
117 | BT_HIDDEN | |
d73bb381 | 118 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 119 | { |
bb18709b | 120 | bool ret; |
6f79a7cf | 121 | |
d73bb381 | 122 | if (!msg_iter) { |
bb18709b FD |
123 | ret = false; |
124 | goto end; | |
7cdc2bab | 125 | } |
7cdc2bab | 126 | |
d73bb381 PP |
127 | ret = bt_self_message_iterator_is_interrupted( |
128 | msg_iter->self_msg_iter); | |
4bf0e537 | 129 | |
bb18709b FD |
130 | end: |
131 | return ret; | |
7cdc2bab MD |
132 | } |
133 | ||
134 | static | |
135 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
136 | uint64_t trace_id) | |
d3e4dcd8 | 137 | { |
bb18709b FD |
138 | uint64_t trace_idx; |
139 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 140 | |
bb18709b FD |
141 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
142 | struct lttng_live_trace *trace = | |
143 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 144 | if (trace->id == trace_id) { |
bb18709b FD |
145 | ret_trace = trace; |
146 | goto end; | |
7cdc2bab MD |
147 | } |
148 | } | |
bb18709b FD |
149 | |
150 | end: | |
151 | return ret_trace; | |
d3eb6e8f PP |
152 | } |
153 | ||
7cdc2bab | 154 | static |
bb18709b | 155 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 156 | { |
1c0ceb65 | 157 | bt_logging_level log_level = trace->log_level; |
5278d5ba | 158 | bt_self_component *self_comp = trace->self_comp; |
1c0ceb65 | 159 | |
5278d5ba | 160 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 161 | |
bb18709b FD |
162 | BT_ASSERT(trace->stream_iterators); |
163 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 164 | |
bb18709b FD |
165 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
166 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 167 | |
7cdc2bab | 168 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
169 | g_free(trace); |
170 | } | |
171 | ||
172 | static | |
173 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
174 | uint64_t trace_id) | |
175 | { | |
176 | struct lttng_live_trace *trace = NULL; | |
1c0ceb65 | 177 | bt_logging_level log_level = session->log_level; |
5278d5ba | 178 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab MD |
179 | |
180 | trace = g_new0(struct lttng_live_trace, 1); | |
181 | if (!trace) { | |
f6e2a9d2 FD |
182 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
183 | "Failed to allocate live trace"); | |
7cdc2bab MD |
184 | goto error; |
185 | } | |
1c0ceb65 | 186 | trace->log_level = session->log_level; |
5278d5ba | 187 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
188 | trace->session = session; |
189 | trace->id = trace_id; | |
bb18709b FD |
190 | trace->trace_class = NULL; |
191 | trace->trace = NULL; | |
192 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0b6986b4 | 193 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
bb18709b | 194 | BT_ASSERT(trace->stream_iterators); |
7cdc2bab | 195 | trace->new_metadata_needed = true; |
bb18709b FD |
196 | g_ptr_array_add(session->traces, trace); |
197 | ||
5278d5ba | 198 | BT_COMP_LOGI("Create trace"); |
7cdc2bab MD |
199 | goto end; |
200 | error: | |
201 | g_free(trace); | |
202 | trace = NULL; | |
203 | end: | |
204 | return trace; | |
205 | } | |
206 | ||
207 | BT_HIDDEN | |
bb18709b FD |
208 | struct lttng_live_trace *lttng_live_borrow_trace( |
209 | struct lttng_live_session *session, uint64_t trace_id) | |
7cdc2bab MD |
210 | { |
211 | struct lttng_live_trace *trace; | |
212 | ||
213 | trace = lttng_live_find_trace(session, trace_id); | |
214 | if (trace) { | |
bb18709b | 215 | goto end; |
7cdc2bab | 216 | } |
7cdc2bab | 217 | |
bb18709b FD |
218 | /* The session is the owner of the newly created trace. */ |
219 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 220 | |
bb18709b FD |
221 | end: |
222 | return trace; | |
7cdc2bab MD |
223 | } |
224 | ||
225 | BT_HIDDEN | |
bb18709b | 226 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
227 | uint64_t session_id, const char *hostname, |
228 | const char *session_name) | |
7cdc2bab MD |
229 | { |
230 | int ret = 0; | |
bb18709b | 231 | struct lttng_live_session *session; |
1c0ceb65 | 232 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 233 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 234 | |
bb18709b FD |
235 | session = g_new0(struct lttng_live_session, 1); |
236 | if (!session) { | |
f6e2a9d2 FD |
237 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
238 | "Failed to allocate live session"); | |
7cdc2bab MD |
239 | goto error; |
240 | } | |
241 | ||
1c0ceb65 | 242 | session->log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 243 | session->self_comp = lttng_live_msg_iter->self_comp; |
bb18709b FD |
244 | session->id = session_id; |
245 | session->traces = g_ptr_array_new_with_free_func( | |
0b6986b4 | 246 | (GDestroyNotify) lttng_live_destroy_trace); |
bb18709b FD |
247 | BT_ASSERT(session->traces); |
248 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
249 | session->new_streams_needed = true; | |
250 | session->hostname = g_string_new(hostname); | |
251 | BT_ASSERT(session->hostname); | |
252 | ||
253 | session->session_name = g_string_new(session_name); | |
254 | BT_ASSERT(session->session_name); | |
7cdc2bab | 255 | |
5278d5ba | 256 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
bb18709b FD |
257 | session->id, hostname, session_name); |
258 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); | |
7cdc2bab MD |
259 | goto end; |
260 | error: | |
bb18709b | 261 | g_free(session); |
7cdc2bab MD |
262 | ret = -1; |
263 | end: | |
264 | return ret; | |
265 | } | |
266 | ||
267 | static | |
268 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
269 | { | |
1c0ceb65 | 270 | bt_logging_level log_level; |
5278d5ba | 271 | bt_self_component *self_comp; |
bb18709b FD |
272 | |
273 | if (!session) { | |
274 | goto end; | |
275 | } | |
7cdc2bab | 276 | |
1c0ceb65 | 277 | log_level = session->log_level; |
5278d5ba PP |
278 | self_comp = session->self_comp; |
279 | BT_COMP_LOGD("Destroy lttng live session"); | |
7cdc2bab MD |
280 | if (session->id != -1ULL) { |
281 | if (lttng_live_detach_session(session)) { | |
4c5287b9 FD |
282 | if (!lttng_live_graph_is_canceled( |
283 | session->lttng_live_msg_iter)) { | |
4c66436f | 284 | /* Old relayd cannot detach sessions. */ |
5278d5ba | 285 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
286 | session->id); |
287 | } | |
7cdc2bab MD |
288 | } |
289 | session->id = -1ULL; | |
290 | } | |
bb18709b FD |
291 | |
292 | if (session->traces) { | |
293 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 294 | } |
bb18709b | 295 | |
06994c71 MD |
296 | if (session->hostname) { |
297 | g_string_free(session->hostname, TRUE); | |
298 | } | |
299 | if (session->session_name) { | |
300 | g_string_free(session->session_name, TRUE); | |
301 | } | |
7cdc2bab | 302 | g_free(session); |
bb18709b FD |
303 | |
304 | end: | |
305 | return; | |
7cdc2bab MD |
306 | } |
307 | ||
bb18709b FD |
308 | static |
309 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 310 | { |
bb18709b FD |
311 | if (!lttng_live_msg_iter) { |
312 | goto end; | |
7cdc2bab | 313 | } |
7cdc2bab | 314 | |
bb18709b FD |
315 | if (lttng_live_msg_iter->sessions) { |
316 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 317 | } |
bb18709b | 318 | |
31ee2162 FD |
319 | if (lttng_live_msg_iter->viewer_connection) { |
320 | live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection); | |
321 | } | |
bb18709b FD |
322 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); |
323 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
324 | ||
325 | /* All stream iterators must be destroyed at this point. */ | |
326 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
327 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
328 | ||
329 | g_free(lttng_live_msg_iter); | |
330 | ||
331 | end: | |
332 | return; | |
333 | } | |
334 | ||
335 | BT_HIDDEN | |
336 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
337 | { | |
338 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
339 | ||
340 | BT_ASSERT(self_msg_iter); | |
341 | ||
342 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
343 | BT_ASSERT(lttng_live_msg_iter); | |
344 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
345 | } |
346 | ||
347 | static | |
bb18709b | 348 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
349 | struct lttng_live_stream_iterator *lttng_live_stream) |
350 | { | |
1c0ceb65 | 351 | bt_logging_level log_level = lttng_live_stream->log_level; |
5278d5ba | 352 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
1c0ceb65 | 353 | |
7cdc2bab MD |
354 | switch (lttng_live_stream->state) { |
355 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
356 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
357 | break; | |
358 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
359 | /* Invalid state. */ | |
5278d5ba | 360 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
24847fc7 | 361 | bt_common_abort(); |
7cdc2bab MD |
362 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
363 | /* Invalid state. */ | |
5278d5ba | 364 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
24847fc7 | 365 | bt_common_abort(); |
7cdc2bab MD |
366 | case LTTNG_LIVE_STREAM_EOF: |
367 | break; | |
368 | } | |
bb18709b | 369 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
370 | } |
371 | ||
372 | /* | |
373 | * For active no data stream, fetch next data. It can be either: | |
374 | * - quiescent: need to put it in the prio heap at quiescent end | |
375 | * timestamp, | |
376 | * - have data: need to wire up first event into the prio heap, | |
377 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
378 | * return EOF. | |
379 | */ | |
380 | static | |
bb18709b FD |
381 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
382 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
383 | struct lttng_live_stream_iterator *lttng_live_stream) |
384 | { | |
1c0ceb65 | 385 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 386 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0b6986b4 | 387 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 388 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
0b6986b4 | 389 | struct packet_index index; |
7cdc2bab MD |
390 | |
391 | if (lttng_live_stream->trace->new_metadata_needed) { | |
bb18709b | 392 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
393 | goto end; |
394 | } | |
395 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
bb18709b | 396 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
397 | goto end; |
398 | } | |
bb18709b FD |
399 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
400 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
401 | goto end; |
402 | } | |
bb18709b FD |
403 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
404 | &index); | |
405 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
7cdc2bab MD |
406 | goto end; |
407 | } | |
ec4a3354 | 408 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 409 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
bb18709b FD |
410 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
411 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
412 | ||
413 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
414 | last_inact_ts == curr_inact_ts) { | |
415 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
7cdc2bab MD |
416 | print_stream_state(lttng_live_stream); |
417 | } else { | |
bb18709b | 418 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
419 | } |
420 | goto end; | |
421 | } | |
422 | lttng_live_stream->base_offset = index.offset; | |
423 | lttng_live_stream->offset = index.offset; | |
424 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
425 | end: | |
bb18709b FD |
426 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
427 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
428 | } |
429 | return ret; | |
430 | } | |
431 | ||
432 | /* | |
bb18709b FD |
433 | * Creation of the message requires the ctf trace class to be created |
434 | * beforehand, but the live protocol gives us all streams (including metadata) | |
435 | * at once. So we split it in three steps: getting streams, getting metadata | |
436 | * (which creates the ctf trace class), and then creating the per-stream | |
437 | * messages. | |
7cdc2bab MD |
438 | */ |
439 | static | |
bb18709b FD |
440 | enum lttng_live_iterator_status lttng_live_get_session( |
441 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
442 | struct lttng_live_session *session) |
443 | { | |
f6e2a9d2 FD |
444 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
445 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
bb18709b FD |
446 | enum lttng_live_iterator_status status; |
447 | uint64_t trace_idx; | |
7cdc2bab | 448 | |
bb18709b | 449 | if (!session->attached) { |
477ede8e | 450 | enum lttng_live_attach_session_status attach_status = |
2428e031 SM |
451 | lttng_live_attach_session(session, |
452 | lttng_live_msg_iter->self_msg_iter); | |
477ede8e | 453 | if (attach_status != LTTNG_LIVE_ATTACH_SESSION_STATUS_OK) { |
4c5287b9 | 454 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
f6e2a9d2 FD |
455 | /* |
456 | * Clear any causes appended in | |
457 | * `lttng_live_attach_session()` as we want to | |
458 | * return gracefully since the graph was | |
459 | * cancelled. | |
460 | */ | |
461 | bt_current_thread_clear_error(); | |
bb18709b FD |
462 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
463 | } else { | |
464 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
f6e2a9d2 FD |
465 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
466 | "Error attaching to LTTng live session"); | |
bb18709b FD |
467 | } |
468 | goto end; | |
4c66436f | 469 | } |
7cdc2bab | 470 | } |
bb18709b | 471 | |
2428e031 SM |
472 | status = lttng_live_get_new_streams(session, |
473 | lttng_live_msg_iter->self_msg_iter); | |
bb18709b FD |
474 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
475 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
476 | goto end; | |
7cdc2bab | 477 | } |
f797424a FD |
478 | trace_idx = 0; |
479 | while (trace_idx < session->traces->len) { | |
bb18709b FD |
480 | struct lttng_live_trace *trace = |
481 | g_ptr_array_index(session->traces, trace_idx); | |
482 | ||
7cdc2bab | 483 | status = lttng_live_metadata_update(trace); |
f797424a FD |
484 | switch (status) { |
485 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
486 | trace_idx++; | |
487 | break; | |
488 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
489 | /* | |
490 | * The trace has ended. Remove it of the array an | |
491 | * continue the iteration. | |
492 | * We can remove the trace safely when using the | |
493 | * g_ptr_array_remove_index_fast because it replaces | |
494 | * the element at trace_idx with the array's last | |
495 | * element. trace_idx is not incremented because of | |
496 | * that. | |
497 | */ | |
498 | (void) g_ptr_array_remove_index_fast(session->traces, | |
499 | trace_idx); | |
500 | break; | |
501 | default: | |
bb18709b | 502 | goto end; |
7cdc2bab MD |
503 | } |
504 | } | |
2428e031 SM |
505 | status = lttng_live_lazy_msg_init(session, |
506 | lttng_live_msg_iter->self_msg_iter); | |
bb18709b FD |
507 | |
508 | end: | |
509 | return status; | |
7cdc2bab MD |
510 | } |
511 | ||
512 | BT_HIDDEN | |
bb18709b | 513 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 514 | { |
bb18709b | 515 | uint64_t session_idx; |
7cdc2bab | 516 | |
bb18709b FD |
517 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
518 | session_idx++) { | |
519 | struct lttng_live_session *session = | |
520 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
521 | session->new_streams_needed = true; |
522 | } | |
523 | } | |
524 | ||
525 | static | |
bb18709b | 526 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 527 | { |
bb18709b | 528 | uint64_t session_idx, trace_idx; |
7cdc2bab | 529 | |
bb18709b FD |
530 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
531 | session_idx++) { | |
532 | struct lttng_live_session *session = | |
533 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 534 | session->new_streams_needed = true; |
bb18709b FD |
535 | for (trace_idx = 0; trace_idx < session->traces->len; |
536 | trace_idx++) { | |
537 | struct lttng_live_trace *trace = | |
538 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
539 | trace->new_metadata_needed = true; |
540 | } | |
541 | } | |
542 | } | |
543 | ||
544 | static | |
bb18709b FD |
545 | enum lttng_live_iterator_status |
546 | lttng_live_iterator_handle_new_streams_and_metadata( | |
547 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 548 | { |
0b6986b4 | 549 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
f6e2a9d2 FD |
550 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
551 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
bb18709b FD |
552 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
553 | struct lttng_live_session *session; | |
554 | enum session_not_found_action sess_not_found_act = | |
555 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
556 | ||
7cdc2bab | 557 | /* |
bb18709b | 558 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
559 | * session" flag to the protocol, which would tell us that we |
560 | * need to query for new sessions even though we have sessions | |
561 | * currently ongoing. | |
562 | */ | |
bb18709b FD |
563 | if (lttng_live_msg_iter->sessions->len == 0) { |
564 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
565 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
566 | goto end; | |
567 | } else { | |
568 | /* | |
569 | * Retry to create a viewer session for the requested | |
570 | * session name. | |
571 | */ | |
572 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
573 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
f6e2a9d2 FD |
574 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
575 | "Error creating LTTng live viewer session"); | |
bb18709b FD |
576 | goto end; |
577 | } | |
578 | } | |
7cdc2bab | 579 | } |
bb18709b FD |
580 | |
581 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
582 | session_idx++) { | |
583 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
584 | session_idx); | |
585 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 586 | switch (ret) { |
bb18709b | 587 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 588 | break; |
bb18709b FD |
589 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
590 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
591 | break; |
592 | default: | |
593 | goto end; | |
594 | } | |
595 | if (!session->closed) { | |
596 | nr_sessions_opened++; | |
597 | } | |
598 | } | |
599 | end: | |
bb18709b FD |
600 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
601 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
602 | nr_sessions_opened == 0) { | |
603 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
604 | } |
605 | return ret; | |
606 | } | |
607 | ||
608 | static | |
bb18709b FD |
609 | enum lttng_live_iterator_status emit_inactivity_message( |
610 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
611 | struct lttng_live_stream_iterator *stream_iter, | |
612 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 613 | { |
0b6986b4 | 614 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
f6e2a9d2 FD |
615 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
616 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
bb18709b | 617 | bt_message *msg = NULL; |
7cdc2bab | 618 | |
bb18709b FD |
619 | BT_ASSERT(stream_iter->trace->clock_class); |
620 | ||
621 | msg = bt_message_message_iterator_inactivity_create( | |
0b6986b4 FD |
622 | lttng_live_msg_iter->self_msg_iter, |
623 | stream_iter->trace->clock_class, timestamp); | |
b09a5592 | 624 | if (!msg) { |
f6e2a9d2 FD |
625 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
626 | "Error emitting message iterator inactivity message"); | |
7cdc2bab MD |
627 | goto error; |
628 | } | |
bb18709b | 629 | |
b09a5592 | 630 | *message = msg; |
7cdc2bab | 631 | end: |
7cdc2bab MD |
632 | return ret; |
633 | ||
634 | error: | |
bb18709b | 635 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
b09a5592 | 636 | bt_message_put_ref(msg); |
7cdc2bab MD |
637 | goto end; |
638 | } | |
639 | ||
640 | static | |
bb18709b FD |
641 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
642 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 643 | struct lttng_live_stream_iterator *lttng_live_stream, |
bb18709b | 644 | bt_message **message) |
7cdc2bab | 645 | { |
0b6986b4 | 646 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
647 | |
648 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
bb18709b | 649 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
650 | } |
651 | ||
bb18709b FD |
652 | if (lttng_live_stream->current_inactivity_ts == |
653 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 654 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
bb18709b FD |
655 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
656 | goto end; | |
657 | } | |
658 | ||
659 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0b6986b4 | 660 | message, lttng_live_stream->current_inactivity_ts); |
bb18709b FD |
661 | |
662 | lttng_live_stream->last_inactivity_ts = | |
0b6986b4 | 663 | lttng_live_stream->current_inactivity_ts; |
bb18709b FD |
664 | end: |
665 | return ret; | |
666 | } | |
667 | ||
668 | static | |
669 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
670 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
671 | const bt_message *msg, int64_t last_msg_ts_ns, | |
672 | int64_t *ts_ns) | |
673 | { | |
674 | const bt_clock_class *clock_class = NULL; | |
675 | const bt_clock_snapshot *clock_snapshot = NULL; | |
676 | int ret = 0; | |
1c0ceb65 | 677 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 678 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
bb18709b | 679 | |
ec4a3354 PP |
680 | BT_ASSERT_DBG(msg); |
681 | BT_ASSERT_DBG(ts_ns); | |
bb18709b | 682 | |
5278d5ba | 683 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
bb18709b FD |
684 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
685 | last_msg_ts_ns); | |
686 | ||
687 | switch (bt_message_get_type(msg)) { | |
688 | case BT_MESSAGE_TYPE_EVENT: | |
0b6986b4 | 689 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
bb18709b | 690 | msg); |
ec4a3354 | 691 | BT_ASSERT_DBG(clock_class); |
bb18709b | 692 | |
11ddb3ef PP |
693 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
694 | msg); | |
bb18709b FD |
695 | break; |
696 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0b6986b4 | 697 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
698 | msg); |
699 | BT_ASSERT(clock_class); | |
700 | ||
11ddb3ef PP |
701 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
702 | msg); | |
bb18709b FD |
703 | break; |
704 | case BT_MESSAGE_TYPE_PACKET_END: | |
0b6986b4 | 705 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
706 | msg); |
707 | BT_ASSERT(clock_class); | |
708 | ||
11ddb3ef PP |
709 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
710 | msg); | |
bb18709b FD |
711 | break; |
712 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0b6986b4 | 713 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
714 | msg); |
715 | BT_ASSERT(clock_class); | |
716 | ||
5ef34326 | 717 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
11ddb3ef | 718 | msg); |
bb18709b FD |
719 | break; |
720 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0b6986b4 | 721 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
bb18709b FD |
722 | msg); |
723 | BT_ASSERT(clock_class); | |
724 | ||
5ef34326 | 725 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
11ddb3ef | 726 | msg); |
bb18709b | 727 | break; |
bb18709b | 728 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0b6986b4 FD |
729 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
730 | msg); | |
bb18709b FD |
731 | break; |
732 | default: | |
733 | /* All the other messages have a higher priority */ | |
5278d5ba | 734 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
bb18709b | 735 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
736 | goto end; |
737 | } | |
738 | ||
bb18709b | 739 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
ec4a3354 | 740 | BT_ASSERT_DBG(clock_class); |
bb18709b FD |
741 | |
742 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
743 | if (ret) { | |
f6e2a9d2 FD |
744 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
745 | "Cannot get nanoseconds from Epoch of clock snapshot: " | |
bb18709b FD |
746 | "clock-snapshot-addr=%p", clock_snapshot); |
747 | goto error; | |
748 | } | |
749 | ||
750 | goto end; | |
751 | ||
bb18709b FD |
752 | error: |
753 | ret = -1; | |
7cdc2bab | 754 | |
7cdc2bab | 755 | end: |
bb18709b | 756 | if (ret == 0) { |
5278d5ba | 757 | BT_COMP_LOGD("Found message's timestamp: " |
bb18709b FD |
758 | "iter-data-addr=%p, msg-addr=%p, " |
759 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
760 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
761 | } | |
762 | ||
7cdc2bab MD |
763 | return ret; |
764 | } | |
765 | ||
766 | static | |
bb18709b FD |
767 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
768 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 769 | struct lttng_live_stream_iterator *lttng_live_stream, |
bb18709b | 770 | bt_message **message) |
7cdc2bab | 771 | { |
bb18709b | 772 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1c0ceb65 | 773 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 774 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
5d452e1f | 775 | enum ctf_msg_iter_status status; |
0b6986b4 | 776 | uint64_t session_idx, trace_idx; |
7cdc2bab | 777 | |
bb18709b FD |
778 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
779 | session_idx++) { | |
780 | struct lttng_live_session *session = | |
781 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
782 | |
783 | if (session->new_streams_needed) { | |
bb18709b FD |
784 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
785 | goto end; | |
7cdc2bab | 786 | } |
bb18709b FD |
787 | for (trace_idx = 0; trace_idx < session->traces->len; |
788 | trace_idx++) { | |
789 | struct lttng_live_trace *trace = | |
790 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 791 | if (trace->new_metadata_needed) { |
bb18709b FD |
792 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
793 | goto end; | |
7cdc2bab MD |
794 | } |
795 | } | |
796 | } | |
797 | ||
798 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
bb18709b FD |
799 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
800 | goto end; | |
7cdc2bab | 801 | } |
bb18709b | 802 | |
2428e031 SM |
803 | status = ctf_msg_iter_get_next_message( |
804 | lttng_live_stream->msg_iter, message); | |
7cdc2bab | 805 | switch (status) { |
5d452e1f | 806 | case CTF_MSG_ITER_STATUS_EOF: |
bb18709b | 807 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 808 | break; |
5d452e1f | 809 | case CTF_MSG_ITER_STATUS_OK: |
bb18709b | 810 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 811 | break; |
5d452e1f | 812 | case CTF_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
813 | /* |
814 | * Continue immediately (end of packet). The next | |
815 | * get_index may return AGAIN to delay the following | |
816 | * attempt. | |
817 | */ | |
bb18709b | 818 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 819 | break; |
5d452e1f | 820 | case CTF_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 821 | /* No argument provided by the user, so don't return INVAL. */ |
5d452e1f | 822 | case CTF_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 823 | default: |
bb18709b | 824 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
f6e2a9d2 FD |
825 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
826 | "CTF message iterator return an error or failed: " | |
827 | "msg_iter=%p", lttng_live_stream->msg_iter); | |
7cdc2bab MD |
828 | break; |
829 | } | |
bb18709b FD |
830 | |
831 | end: | |
7cdc2bab MD |
832 | return ret; |
833 | } | |
834 | ||
5b337d32 FD |
835 | static |
836 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
837 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
838 | struct lttng_live_stream_iterator *stream_iter, | |
839 | bt_message **curr_msg) | |
840 | { | |
841 | enum lttng_live_iterator_status live_status = | |
842 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
f6e2a9d2 FD |
843 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
844 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
5b337d32 FD |
845 | /* |
846 | * The viewer has hung up on us so we are closing the stream. The | |
5d452e1f | 847 | * `ctf_msg_iter` should simply realize that it needs to close the |
5b337d32 FD |
848 | * stream properly by emitting the necessary stream end message. |
849 | */ | |
5d452e1f | 850 | enum ctf_msg_iter_status status = ctf_msg_iter_get_next_message( |
2428e031 | 851 | stream_iter->msg_iter, curr_msg); |
5b337d32 | 852 | |
5d452e1f | 853 | if (status == CTF_MSG_ITER_STATUS_ERROR) { |
f6e2a9d2 FD |
854 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
855 | "Error getting the next message from CTF message iterator"); | |
5b337d32 FD |
856 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
857 | goto end; | |
858 | } | |
859 | ||
5d452e1f | 860 | BT_ASSERT(status == CTF_MSG_ITER_STATUS_OK); |
5b337d32 FD |
861 | |
862 | end: | |
863 | return live_status; | |
864 | } | |
865 | ||
7cdc2bab MD |
866 | /* |
867 | * helper function: | |
868 | * handle_no_data_streams() | |
869 | * retry: | |
870 | * - for each ACTIVE_NO_DATA stream: | |
871 | * - query relayd for stream data, or quiescence info. | |
872 | * - if need metadata, get metadata, goto retry. | |
873 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
874 | * - if quiescent, move to QUIESCENT streams | |
875 | * - if fetched data, move to ACTIVE_DATA streams | |
876 | * (at this point each stream either has data, or is quiescent) | |
877 | * | |
878 | * | |
879 | * iterator_next: | |
880 | * handle_new_streams_and_metadata() | |
881 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
882 | * - query relayd for metadata | |
883 | * | |
884 | * call handle_active_no_data_streams() | |
885 | * | |
886 | * handle_quiescent_streams() | |
887 | * - if at least one stream is ACTIVE_DATA: | |
888 | * - peek stream event with lowest timestamp -> next_ts | |
889 | * - for each quiescent stream | |
890 | * - if next_ts >= quiescent end | |
891 | * - set state to ACTIVE_NO_DATA | |
892 | * - else | |
893 | * - for each quiescent stream | |
894 | * - set state to ACTIVE_NO_DATA | |
895 | * | |
896 | * call handle_active_no_data_streams() | |
897 | * | |
898 | * handle_active_data_streams() | |
899 | * - if at least one stream is ACTIVE_DATA: | |
900 | * - get stream event with lowest timestamp from heap | |
b09a5592 | 901 | * - make that stream event the current message. |
7cdc2bab MD |
902 | * - move this stream heap position to its next event |
903 | * - if we need to fetch data from relayd, move | |
904 | * stream to ACTIVE_NO_DATA. | |
905 | * - return OK | |
906 | * - return AGAIN | |
907 | * | |
908 | * end criterion: ctrl-c on client. If relayd exits or the session | |
909 | * closes on the relay daemon side, we keep on waiting for streams. | |
910 | * Eventually handle --end timestamp (also an end criterion). | |
911 | * | |
912 | * When disconnected from relayd: try to re-connect endlessly. | |
913 | */ | |
914 | static | |
4990894b | 915 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
bb18709b FD |
916 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
917 | struct lttng_live_stream_iterator *stream_iter, | |
918 | bt_message **curr_msg) | |
7cdc2bab | 919 | { |
1c0ceb65 | 920 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
5278d5ba | 921 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
bb18709b | 922 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 923 | |
5b337d32 FD |
924 | if (stream_iter->has_stream_hung_up) { |
925 | /* | |
926 | * The stream has hung up and the stream was properly closed | |
927 | * during the last call to the current function. Return _END | |
928 | * status now so that this stream iterator is removed for the | |
929 | * stream iterator list. | |
930 | */ | |
931 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
932 | goto end; | |
933 | } | |
934 | ||
7cdc2bab MD |
935 | retry: |
936 | print_stream_state(stream_iter); | |
bb18709b | 937 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0b6986b4 | 938 | lttng_live_msg_iter); |
bb18709b | 939 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
940 | goto end; |
941 | } | |
bb18709b | 942 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0b6986b4 | 943 | lttng_live_msg_iter, stream_iter); |
5b337d32 | 944 | |
bb18709b | 945 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5b337d32 FD |
946 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
947 | /* | |
948 | * We overwrite `live_status` since `curr_msg` is | |
949 | * likely set to a valid message in this function. | |
950 | */ | |
951 | live_status = lttng_live_iterator_close_stream( | |
952 | lttng_live_msg_iter, stream_iter, curr_msg); | |
953 | } | |
7cdc2bab MD |
954 | goto end; |
955 | } | |
bb18709b | 956 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0b6986b4 | 957 | lttng_live_msg_iter, stream_iter, curr_msg); |
bb18709b | 958 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
8e01f2d9 | 959 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
960 | goto end; |
961 | } | |
bb18709b | 962 | if (*curr_msg) { |
7cdc2bab MD |
963 | goto end; |
964 | } | |
bb18709b | 965 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0b6986b4 | 966 | lttng_live_msg_iter, stream_iter, curr_msg); |
bb18709b | 967 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
8e01f2d9 | 968 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
969 | } |
970 | ||
971 | end: | |
bb18709b | 972 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 973 | goto retry; |
7cdc2bab | 974 | } |
bb18709b FD |
975 | |
976 | return live_status; | |
7cdc2bab MD |
977 | } |
978 | ||
979 | static | |
bb18709b FD |
980 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
981 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
982 | struct lttng_live_trace *live_trace, | |
4990894b | 983 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 984 | { |
4990894b | 985 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0b6986b4 FD |
986 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
987 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
bb18709b | 988 | enum lttng_live_iterator_status stream_iter_status;; |
4990894b | 989 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
bb18709b | 990 | uint64_t stream_iter_idx; |
7cdc2bab | 991 | |
ec4a3354 PP |
992 | BT_ASSERT_DBG(live_trace); |
993 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
bb18709b FD |
994 | /* |
995 | * Update the current message of every stream iterators of this trace. | |
996 | * The current msg of every stream must have a timestamp equal or | |
997 | * larger than the last message returned by this iterator. We must | |
998 | * ensure monotonicity. | |
999 | */ | |
1000 | stream_iter_idx = 0; | |
1001 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
1002 | bool stream_iter_is_ended = false; | |
1003 | struct lttng_live_stream_iterator *stream_iter = | |
1004 | g_ptr_array_index(live_trace->stream_iterators, | |
0b6986b4 | 1005 | stream_iter_idx); |
bb18709b FD |
1006 | |
1007 | /* | |
1008 | * Find if there is are now current message for this stream | |
1009 | * iterator get it. | |
1010 | */ | |
1011 | while (!stream_iter->current_msg) { | |
1012 | bt_message *msg = NULL; | |
1013 | int64_t curr_msg_ts_ns = INT64_MAX; | |
4990894b | 1014 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0b6986b4 | 1015 | lttng_live_msg_iter, stream_iter, &msg); |
bb18709b | 1016 | |
5278d5ba | 1017 | BT_COMP_LOGD("live stream iterator returned status :%s", |
0b6986b4 | 1018 | print_live_iterator_status(stream_iter_status)); |
bb18709b FD |
1019 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1020 | stream_iter_is_ended = true; | |
1021 | break; | |
1022 | } | |
1023 | ||
1024 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1025 | goto end; | |
1026 | } | |
1027 | ||
ec4a3354 | 1028 | BT_ASSERT_DBG(msg); |
bb18709b FD |
1029 | |
1030 | /* | |
1031 | * Get the timestamp in nanoseconds from origin of this | |
1032 | * messsage. | |
1033 | */ | |
1034 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1035 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1036 | &curr_msg_ts_ns); | |
1037 | ||
1038 | /* | |
1039 | * Check if the message of the current live stream | |
1040 | * iterator occured at the exact same time or after the | |
1041 | * last message returned by this component's message | |
1042 | * iterator. If not, we return an error. | |
1043 | */ | |
1044 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1045 | stream_iter->current_msg = msg; | |
1046 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
1047 | } else { | |
1048 | /* | |
1049 | * We received a message in the past. To ensure | |
1050 | * monotonicity, we can't send it forward. | |
1051 | */ | |
f6e2a9d2 FD |
1052 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1053 | "Message's timestamp is less than " | |
bb18709b FD |
1054 | "lttng-live's message iterator's last " |
1055 | "returned timestamp: " | |
1056 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1057 | "last-msg-ts=%" PRId64, | |
1058 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1059 | lttng_live_msg_iter->last_msg_ts_ns); | |
1060 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1061 | goto end; | |
1062 | } | |
1063 | } | |
1064 | ||
ec4a3354 | 1065 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
51c1eaeb FD |
1066 | |
1067 | if (!stream_iter_is_ended) { | |
4990894b FD |
1068 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1069 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
51c1eaeb FD |
1070 | /* |
1071 | * Update the current best candidate message | |
1072 | * for the stream iterator of this live trace | |
1073 | * to be forwarded downstream. | |
1074 | */ | |
4990894b FD |
1075 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1076 | youngest_candidate_stream_iter = stream_iter; | |
1077 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
51c1eaeb FD |
1078 | /* |
1079 | * Order the messages in an arbitrary but | |
1080 | * deterministic way. | |
1081 | */ | |
ec4a3354 | 1082 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
51c1eaeb FD |
1083 | int ret = common_muxing_compare_messages( |
1084 | stream_iter->current_msg, | |
4990894b | 1085 | youngest_candidate_stream_iter->current_msg); |
51c1eaeb FD |
1086 | if (ret < 0) { |
1087 | /* | |
4990894b | 1088 | * The `youngest_candidate_stream_iter->current_msg` |
51c1eaeb FD |
1089 | * should go first. Update the next |
1090 | * iterator and the current timestamp. | |
1091 | */ | |
4990894b FD |
1092 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1093 | youngest_candidate_stream_iter = stream_iter; | |
51c1eaeb FD |
1094 | } else if (ret == 0) { |
1095 | /* | |
1096 | * Unable to pick which one should go | |
1097 | * first. | |
1098 | */ | |
1099 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1100 | "stream-iter-addr=%p" | |
1101 | "stream-iter-addr=%p", | |
1102 | stream_iter, | |
4990894b | 1103 | youngest_candidate_stream_iter); |
51c1eaeb FD |
1104 | } |
1105 | } | |
bb18709b | 1106 | |
51c1eaeb FD |
1107 | stream_iter_idx++; |
1108 | } else { | |
bb18709b | 1109 | /* |
e469e550 JG |
1110 | * The live stream iterator has ended. That |
1111 | * iterator is removed from the array, but | |
1112 | * there is no need to increment | |
1113 | * stream_iter_idx as | |
1114 | * g_ptr_array_remove_index_fast replaces the | |
1115 | * removed element with the array's last | |
1116 | * element. | |
bb18709b | 1117 | */ |
e469e550 JG |
1118 | g_ptr_array_remove_index_fast( |
1119 | live_trace->stream_iterators, | |
bb18709b | 1120 | stream_iter_idx); |
bb18709b FD |
1121 | } |
1122 | } | |
1123 | ||
4990894b FD |
1124 | if (youngest_candidate_stream_iter) { |
1125 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
bb18709b FD |
1126 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1127 | } else { | |
1128 | /* | |
1129 | * The only case where we don't have a candidate for this trace | |
1130 | * is if we reached the end of all the iterators. | |
1131 | */ | |
1132 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1133 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1134 | } | |
1135 | ||
1136 | end: | |
1137 | return stream_iter_status; | |
1138 | } | |
1139 | ||
1140 | static | |
1141 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1142 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1143 | struct lttng_live_session *session, | |
4990894b | 1144 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
bb18709b | 1145 | { |
51c1eaeb FD |
1146 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1147 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
bb18709b FD |
1148 | enum lttng_live_iterator_status stream_iter_status; |
1149 | uint64_t trace_idx = 0; | |
4990894b FD |
1150 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1151 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
bb18709b FD |
1152 | |
1153 | /* | |
1154 | * Make sure we are attached to the session and look for new streams | |
1155 | * and metadata. | |
1156 | */ | |
1157 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1158 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1159 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1160 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1161 | goto end; |
1162 | } | |
bb18709b | 1163 | |
ec4a3354 | 1164 | BT_ASSERT_DBG(session->traces); |
bb18709b | 1165 | |
bb18709b FD |
1166 | while (trace_idx < session->traces->len) { |
1167 | bool trace_is_ended = false; | |
1168 | struct lttng_live_stream_iterator *stream_iter; | |
1169 | struct lttng_live_trace *trace = | |
1170 | g_ptr_array_index(session->traces, trace_idx); | |
1171 | ||
1172 | stream_iter_status = next_stream_iterator_for_trace( | |
1173 | lttng_live_msg_iter, trace, &stream_iter); | |
1174 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1175 | /* | |
1176 | * All the live stream iterators for this trace are | |
1177 | * ENDed. Remove the trace from this session. | |
1178 | */ | |
1179 | trace_is_ended = true; | |
1180 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1181 | goto end; | |
1182 | } | |
1183 | ||
1184 | if (!trace_is_ended) { | |
ec4a3354 | 1185 | BT_ASSERT_DBG(stream_iter); |
bb18709b | 1186 | |
4990894b FD |
1187 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1188 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1189 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1190 | youngest_candidate_stream_iter = stream_iter; | |
1191 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
51c1eaeb FD |
1192 | /* |
1193 | * Order the messages in an arbitrary but | |
1194 | * deterministic way. | |
1195 | */ | |
1196 | int ret = common_muxing_compare_messages( | |
1197 | stream_iter->current_msg, | |
4990894b | 1198 | youngest_candidate_stream_iter->current_msg); |
51c1eaeb FD |
1199 | if (ret < 0) { |
1200 | /* | |
4990894b | 1201 | * The `youngest_candidate_stream_iter->current_msg` |
51c1eaeb FD |
1202 | * should go first. Update the next iterator |
1203 | * and the current timestamp. | |
1204 | */ | |
4990894b FD |
1205 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1206 | youngest_candidate_stream_iter = stream_iter; | |
51c1eaeb FD |
1207 | } else if (ret == 0) { |
1208 | /* Unable to pick which one should go first. */ | |
1209 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1210 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
4990894b | 1211 | stream_iter, youngest_candidate_stream_iter); |
51c1eaeb | 1212 | } |
bb18709b FD |
1213 | } |
1214 | trace_idx++; | |
1215 | } else { | |
61c935bb JG |
1216 | /* |
1217 | * trace_idx is not incremented since | |
1218 | * g_ptr_array_remove_index_fast replaces the | |
1219 | * element at trace_idx with the array's last element. | |
1220 | */ | |
1221 | g_ptr_array_remove_index_fast(session->traces, | |
1222 | trace_idx); | |
bb18709b FD |
1223 | } |
1224 | } | |
4990894b FD |
1225 | if (youngest_candidate_stream_iter) { |
1226 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
bb18709b | 1227 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1228 | } else { |
bb18709b FD |
1229 | /* |
1230 | * The only cases where we don't have a candidate for this | |
1231 | * trace is: | |
1232 | * 1. if we reached the end of all the iterators of all the | |
1233 | * traces of this session, | |
1234 | * 2. if we never had live stream iterator in the first place. | |
1235 | * | |
1236 | * In either cases, we return END. | |
1237 | */ | |
1238 | BT_ASSERT(session->traces->len == 0); | |
1239 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1240 | } |
1241 | end: | |
bb18709b FD |
1242 | return stream_iter_status; |
1243 | } | |
1244 | ||
1245 | static inline | |
1246 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1247 | { | |
1248 | uint64_t i; | |
1249 | ||
1250 | for (i = 0; i < count; i++) { | |
1251 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1252 | } |
7cdc2bab MD |
1253 | } |
1254 | ||
d3eb6e8f | 1255 | BT_HIDDEN |
fb25b9e3 | 1256 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
bb18709b FD |
1257 | bt_self_message_iterator *self_msg_it, |
1258 | bt_message_array_const msgs, uint64_t capacity, | |
1259 | uint64_t *count) | |
d3eb6e8f | 1260 | { |
fb25b9e3 | 1261 | bt_component_class_message_iterator_next_method_status status; |
bb18709b FD |
1262 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1263 | bt_self_message_iterator_get_data(self_msg_it); | |
1264 | struct lttng_live_component *lttng_live = | |
1265 | lttng_live_msg_iter->lttng_live_comp; | |
eb8cbb9e FD |
1266 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1267 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
bb18709b FD |
1268 | enum lttng_live_iterator_status stream_iter_status; |
1269 | uint64_t session_idx; | |
1270 | ||
1271 | *count = 0; | |
1272 | ||
ec4a3354 | 1273 | BT_ASSERT_DBG(lttng_live_msg_iter); |
bb18709b FD |
1274 | |
1275 | /* | |
1276 | * Clear all the invalid message reference that might be left over in | |
1277 | * the output array. | |
1278 | */ | |
1279 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1280 | ||
1281 | /* | |
1282 | * If no session are exposed on the relay found at the url provided by | |
1283 | * the user, session count will be 0. In this case, we return status | |
1284 | * end to return gracefully. | |
1285 | */ | |
1286 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1287 | if (lttng_live->params.sess_not_found_act != | |
1288 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
fb25b9e3 | 1289 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
bb18709b FD |
1290 | goto no_session; |
1291 | } else { | |
1292 | /* | |
1293 | * The are no more active session for this session | |
1294 | * name. Retry to create a viewer session for the | |
1295 | * requested session name. | |
1296 | */ | |
1297 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
fb25b9e3 | 1298 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
bb18709b FD |
1299 | goto no_session; |
1300 | } | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1305 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * Here the muxing of message is done. | |
1310 | * | |
1311 | * We need to iterate over all the streams of all the traces of all the | |
1312 | * viewer sessions in order to get the message with the smallest | |
1313 | * timestamp. In this case, a session is a viewer session and there is | |
1314 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1315 | * kernel). Each viewer session can have multiple traces, for example, | |
1316 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1317 | * | |
1318 | * We iterate over the streams of each traces to update and see what is | |
1319 | * their next message's timestamp. From those timestamps, we select the | |
1320 | * message with the smallest timestamp as the best candidate message | |
1321 | * for that trace and do the same thing across all the sessions. | |
1322 | * | |
1323 | * We then compare the timestamp of best candidate message of all the | |
1324 | * sessions to pick the message with the smallest timestamp and we | |
1325 | * return it. | |
1326 | */ | |
1327 | while (*count < capacity) { | |
4990894b FD |
1328 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1329 | *candidate_stream_iter = NULL; | |
1330 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
bb18709b | 1331 | |
ec4a3354 | 1332 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
bb18709b | 1333 | session_idx = 0; |
bb18709b FD |
1334 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1335 | struct lttng_live_session *session = | |
1336 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1337 | session_idx); | |
1338 | ||
1339 | /* Find the best candidate message to send downstream. */ | |
1340 | stream_iter_status = next_stream_iterator_for_session( | |
1341 | lttng_live_msg_iter, session, | |
1342 | &candidate_stream_iter); | |
1343 | ||
1344 | /* If we receive an END status, it means that either: | |
1345 | * - Those traces never had active streams (UST with no | |
1346 | * data produced yet), | |
1347 | * - All live stream iterators have ENDed.*/ | |
1348 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1349 | if (session->closed && session->traces->len == 0) { | |
1350 | /* | |
961b4173 JG |
1351 | * Remove the session from the list. |
1352 | * session_idx is not modified since | |
1353 | * g_ptr_array_remove_index_fast | |
1354 | * replaces the the removed element with | |
1355 | * the array's last element. | |
bb18709b FD |
1356 | */ |
1357 | g_ptr_array_remove_index_fast( | |
1358 | lttng_live_msg_iter->sessions, | |
1359 | session_idx); | |
bb18709b FD |
1360 | } else { |
1361 | session_idx++; | |
1362 | } | |
1363 | continue; | |
1364 | } | |
1365 | ||
1366 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1367 | goto end; | |
1368 | } | |
1369 | ||
4990894b | 1370 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
06d0a058 | 1371 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
4990894b FD |
1372 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1373 | youngest_stream_iter = candidate_stream_iter; | |
1374 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
eb8cbb9e FD |
1375 | /* |
1376 | * The currently selected message to be sent | |
1377 | * downstream next has the exact same timestamp | |
1378 | * that of the current candidate message. We | |
1379 | * must break the tie in a predictable manner. | |
1380 | */ | |
1381 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1382 | /* | |
1383 | * Order the messages in an arbitrary but | |
51c1eaeb | 1384 | * deterministic way. |
eb8cbb9e | 1385 | */ |
51c1eaeb FD |
1386 | int ret = common_muxing_compare_messages( |
1387 | candidate_stream_iter->current_msg, | |
4990894b | 1388 | youngest_stream_iter->current_msg); |
eb8cbb9e FD |
1389 | if (ret < 0) { |
1390 | /* | |
1391 | * The `candidate_stream_iter->current_msg` | |
1392 | * should go first. Update the next | |
1393 | * iterator and the current timestamp. | |
1394 | */ | |
4990894b FD |
1395 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1396 | youngest_stream_iter = candidate_stream_iter; | |
eb8cbb9e FD |
1397 | } else if (ret == 0) { |
1398 | /* Unable to pick which one should go first. */ | |
1399 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1400 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
4990894b | 1401 | youngest_stream_iter, candidate_stream_iter); |
eb8cbb9e | 1402 | } |
bb18709b FD |
1403 | } |
1404 | ||
1405 | session_idx++; | |
1406 | } | |
1407 | ||
4990894b | 1408 | if (!youngest_stream_iter) { |
bb18709b FD |
1409 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1410 | goto end; | |
1411 | } | |
1412 | ||
ec4a3354 | 1413 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
bb18709b | 1414 | /* Ensure monotonicity. */ |
ec4a3354 | 1415 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
4990894b | 1416 | youngest_stream_iter->current_msg_ts_ns); |
bb18709b FD |
1417 | |
1418 | /* | |
1419 | * Insert the next message to the message batch. This will set | |
1420 | * stream iterator current messsage to NULL so that next time | |
1421 | * we fetch the next message of that stream iterator | |
1422 | */ | |
4990894b | 1423 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
bb18709b FD |
1424 | (*count)++; |
1425 | ||
1426 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
4990894b FD |
1427 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1428 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
bb18709b FD |
1429 | |
1430 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1431 | } | |
1432 | end: | |
1433 | switch (stream_iter_status) { | |
1434 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1435 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1436 | if (*count > 0) { | |
1437 | /* | |
1438 | * We received a again status but we have some messages | |
1439 | * to send downstream. We send them and return OK for | |
1440 | * now. On the next call we return again if there are | |
1441 | * still no new message to send. | |
1442 | */ | |
fb25b9e3 | 1443 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
bb18709b | 1444 | } else { |
fb25b9e3 | 1445 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
bb18709b | 1446 | } |
7cdc2bab | 1447 | break; |
bb18709b | 1448 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
fb25b9e3 | 1449 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1450 | break; |
bb18709b | 1451 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
fb25b9e3 | 1452 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
bb18709b FD |
1453 | break; |
1454 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1455 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1456 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
fb25b9e3 | 1457 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
bb18709b FD |
1458 | /* Put all existing messages on error. */ |
1459 | put_messages(msgs, *count); | |
7cdc2bab | 1460 | break; |
bb18709b | 1461 | default: |
24847fc7 | 1462 | bt_common_abort(); |
7cdc2bab | 1463 | } |
bb18709b FD |
1464 | |
1465 | no_session: | |
1466 | return status; | |
7cdc2bab | 1467 | } |
41a2b7ae | 1468 | |
7cdc2bab | 1469 | BT_HIDDEN |
4175c1d5 | 1470 | bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init( |
bb18709b | 1471 | bt_self_message_iterator *self_msg_it, |
9415de1c | 1472 | bt_self_message_iterator_configuration *config, |
bb18709b FD |
1473 | bt_self_component_source *self_comp_src, |
1474 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1475 | { |
4175c1d5 FD |
1476 | bt_component_class_message_iterator_initialize_method_status ret = |
1477 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK; | |
bb18709b | 1478 | bt_self_component *self_comp = |
fb25b9e3 | 1479 | bt_self_component_source_as_self_component(self_comp_src); |
bb18709b FD |
1480 | struct lttng_live_component *lttng_live; |
1481 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
1c0ceb65 | 1482 | bt_logging_level log_level; |
bb18709b FD |
1483 | |
1484 | BT_ASSERT(self_msg_it); | |
1485 | ||
1486 | lttng_live = bt_self_component_get_data(self_comp); | |
1c0ceb65 | 1487 | log_level = lttng_live->log_level; |
5278d5ba | 1488 | self_comp = lttng_live->self_comp; |
bb18709b FD |
1489 | |
1490 | /* There can be only one downstream iterator at the same time. */ | |
1491 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1492 | lttng_live->has_msg_iter = true; | |
1493 | ||
1494 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1495 | if (!lttng_live_msg_iter) { | |
4175c1d5 | 1496 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
bb18709b | 1497 | goto end; |
7cdc2bab | 1498 | } |
bb18709b | 1499 | |
1c0ceb65 | 1500 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
5278d5ba | 1501 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
bb18709b FD |
1502 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1503 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1504 | ||
1505 | lttng_live_msg_iter->active_stream_iter = 0; | |
1506 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1507 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1508 | (GDestroyNotify) lttng_live_destroy_session); | |
1509 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1510 | ||
1511 | lttng_live_msg_iter->viewer_connection = | |
1512 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
f6e2a9d2 | 1513 | lttng_live_msg_iter, self_comp, NULL, log_level); |
bb18709b FD |
1514 | if (!lttng_live_msg_iter->viewer_connection) { |
1515 | goto error; | |
1516 | } | |
1517 | ||
1518 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1519 | goto error; | |
1520 | } | |
1521 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1522 | switch (lttng_live->params.sess_not_found_act) { | |
1523 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
5278d5ba | 1524 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
bb18709b FD |
1525 | "session. Keep trying to connect because of " |
1526 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1527 | SESS_NOT_FOUND_ACTION_PARAM, | |
1528 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1529 | lttng_live->params.url->str); | |
1530 | break; | |
1531 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
f6e2a9d2 | 1532 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Unable to connect to the requested live viewer " |
bb18709b FD |
1533 | "session. Fail the message iterator" |
1534 | "initialization because of %s=\"%s\" " | |
1535 | "component parameter: url =\"%s\"", | |
1536 | SESS_NOT_FOUND_ACTION_PARAM, | |
1537 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1538 | lttng_live->params.url->str); | |
7cdc2bab | 1539 | goto error; |
bb18709b | 1540 | case SESSION_NOT_FOUND_ACTION_END: |
5278d5ba | 1541 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
bb18709b FD |
1542 | "session. End gracefully at the first _next() " |
1543 | "call because of %s=\"%s\" component parameter: " | |
1544 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1545 | SESS_NOT_FOUND_ACTION_END_STR, | |
1546 | lttng_live->params.url->str); | |
1547 | break; | |
369d1e21 | 1548 | default: |
24847fc7 | 1549 | bt_common_abort(); |
7cdc2bab | 1550 | } |
7cdc2bab MD |
1551 | } |
1552 | ||
bb18709b FD |
1553 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1554 | ||
1555 | goto end; | |
1556 | error: | |
4175c1d5 | 1557 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
bb18709b | 1558 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1559 | end: |
41a2b7ae | 1560 | return ret; |
7cdc2bab MD |
1561 | } |
1562 | ||
a0df3abf SM |
1563 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1564 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1565 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1566 | }; | |
1567 | ||
7cdc2bab | 1568 | static |
fb25b9e3 PP |
1569 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1570 | const bt_value *params, const bt_value **result, | |
a0df3abf | 1571 | bt_self_component_class *self_comp_class, |
fb25b9e3 | 1572 | bt_logging_level log_level) |
7cdc2bab | 1573 | { |
a0df3abf | 1574 | bt_component_class_query_method_status status; |
bb18709b | 1575 | const bt_value *url_value = NULL; |
7cdc2bab | 1576 | const char *url; |
bb18709b | 1577 | struct live_viewer_connection *viewer_connection = NULL; |
a0df3abf SM |
1578 | enum bt_param_validation_status validation_status; |
1579 | gchar *validate_error = NULL; | |
7cdc2bab | 1580 | |
a0df3abf SM |
1581 | validation_status = bt_param_validation_validate(params, |
1582 | list_sessions_params, &validate_error); | |
1583 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1584 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1585 | goto error; |
a0df3abf | 1586 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
574dea68 | 1587 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
f6e2a9d2 FD |
1588 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", |
1589 | validate_error); | |
7cdc2bab MD |
1590 | goto error; |
1591 | } | |
1592 | ||
a0df3abf | 1593 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
bb18709b FD |
1594 | url = bt_value_string_get(url_value); |
1595 | ||
ca06281d | 1596 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
f6e2a9d2 | 1597 | NULL, self_comp_class, log_level); |
7cdc2bab | 1598 | if (!viewer_connection) { |
f6e2a9d2 FD |
1599 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1600 | "Failed to create viewer connection"); | |
a0df3abf | 1601 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1602 | goto error; |
1603 | } | |
1604 | ||
bb18709b | 1605 | status = live_viewer_connection_list_sessions(viewer_connection, |
a0df3abf | 1606 | result); |
fb25b9e3 | 1607 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
f6e2a9d2 FD |
1608 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1609 | "Failed to list viewer sessions"); | |
1286dcbb PP |
1610 | goto error; |
1611 | } | |
1612 | ||
7cdc2bab | 1613 | goto end; |
1286dcbb | 1614 | |
7cdc2bab | 1615 | error: |
bb18709b | 1616 | BT_VALUE_PUT_REF_AND_RESET(*result); |
1286dcbb | 1617 | |
bb18709b | 1618 | if (status >= 0) { |
fb25b9e3 | 1619 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
1286dcbb PP |
1620 | } |
1621 | ||
7cdc2bab MD |
1622 | end: |
1623 | if (viewer_connection) { | |
bb18709b | 1624 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1625 | } |
a0df3abf SM |
1626 | |
1627 | g_free(validate_error); | |
1628 | ||
bb18709b | 1629 | return status; |
7cdc2bab MD |
1630 | } |
1631 | ||
90fda045 PP |
1632 | static |
1633 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1634 | const bt_value *params, const bt_value **result, | |
f6e2a9d2 | 1635 | bt_self_component_class *self_comp_class, |
90fda045 PP |
1636 | bt_logging_level log_level) |
1637 | { | |
1638 | bt_component_class_query_method_status status = | |
1639 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1640 | const bt_value *input_type_value; | |
1641 | const bt_value *input_value; | |
1642 | double weight = 0; | |
1643 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1644 | ||
1645 | /* Used by the logging macros */ | |
1646 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1647 | ||
1648 | *result = NULL; | |
1649 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1650 | "type"); | |
1651 | if (!input_type_value) { | |
f6e2a9d2 FD |
1652 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1653 | "Missing expected `type` parameter."); | |
90fda045 PP |
1654 | goto error; |
1655 | } | |
1656 | ||
1657 | if (!bt_value_is_string(input_type_value)) { | |
f6e2a9d2 FD |
1658 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1659 | "`type` parameter is not a string value."); | |
90fda045 PP |
1660 | goto error; |
1661 | } | |
1662 | ||
1663 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1664 | /* We don't handle file system paths */ | |
1665 | goto create_result; | |
1666 | } | |
1667 | ||
1668 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1669 | if (!input_value) { | |
f6e2a9d2 FD |
1670 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1671 | "Missing expected `input` parameter."); | |
90fda045 PP |
1672 | goto error; |
1673 | } | |
1674 | ||
1675 | if (!bt_value_is_string(input_value)) { | |
f6e2a9d2 FD |
1676 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1677 | "`input` parameter is not a string value."); | |
90fda045 PP |
1678 | goto error; |
1679 | } | |
1680 | ||
1681 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1682 | NULL, 0); | |
1683 | if (parts.session_name) { | |
1684 | /* | |
1685 | * Looks pretty much like an LTTng live URL: we got the | |
1686 | * session name part, which forms a complete URL. | |
1687 | */ | |
1688 | weight = .75; | |
1689 | } | |
1690 | ||
1691 | create_result: | |
1692 | *result = bt_value_real_create_init(weight); | |
1693 | if (!*result) { | |
1694 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1695 | goto error; | |
1696 | } | |
1697 | ||
1698 | goto end; | |
1699 | ||
1700 | error: | |
1701 | if (status >= 0) { | |
1702 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1703 | } | |
1704 | ||
1705 | BT_ASSERT(!*result); | |
1706 | ||
1707 | end: | |
1708 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1709 | return status; | |
1710 | } | |
1711 | ||
7cdc2bab | 1712 | BT_HIDDEN |
fb25b9e3 PP |
1713 | bt_component_class_query_method_status lttng_live_query( |
1714 | bt_self_component_class_source *comp_class, | |
bf403eb2 | 1715 | bt_private_query_executor *priv_query_exec, |
bb18709b | 1716 | const char *object, const bt_value *params, |
f6e305ce | 1717 | __attribute__((unused)) void *method_data, |
bf403eb2 | 1718 | const bt_value **result) |
7cdc2bab | 1719 | { |
fb25b9e3 PP |
1720 | bt_component_class_query_method_status status = |
1721 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
5278d5ba | 1722 | bt_self_component *self_comp = NULL; |
a0df3abf SM |
1723 | bt_self_component_class *self_comp_class = |
1724 | bt_self_component_class_source_as_self_component_class(comp_class); | |
bf403eb2 PP |
1725 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1726 | bt_private_query_executor_as_query_executor_const( | |
1727 | priv_query_exec)); | |
1286dcbb | 1728 | |
7cdc2bab | 1729 | if (strcmp(object, "sessions") == 0) { |
1c0ceb65 | 1730 | status = lttng_live_query_list_sessions(params, result, |
a0df3abf | 1731 | self_comp_class, log_level); |
90fda045 PP |
1732 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1733 | status = lttng_live_query_support_info(params, result, | |
f6e2a9d2 | 1734 | self_comp_class, log_level); |
bb18709b | 1735 | } else { |
287eb741 | 1736 | BT_COMP_LOGI("Unknown query object `%s`", object); |
7dd3e712 | 1737 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
bb18709b | 1738 | goto end; |
7cdc2bab | 1739 | } |
bb18709b FD |
1740 | |
1741 | end: | |
1742 | return status; | |
7cdc2bab MD |
1743 | } |
1744 | ||
1745 | static | |
1746 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1747 | { | |
059e3940 FD |
1748 | if (!lttng_live) { |
1749 | return; | |
1750 | } | |
bb18709b FD |
1751 | if (lttng_live->params.url) { |
1752 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1753 | } |
1754 | g_free(lttng_live); | |
1755 | } | |
1756 | ||
1757 | BT_HIDDEN | |
bb18709b | 1758 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1759 | { |
bb18709b | 1760 | void *data = bt_self_component_get_data( |
0b6986b4 | 1761 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
1762 | |
1763 | if (!data) { | |
1764 | return; | |
1765 | } | |
1766 | lttng_live_component_destroy_data(data); | |
1767 | } | |
1768 | ||
1769 | static | |
bb18709b FD |
1770 | enum session_not_found_action parse_session_not_found_action_param( |
1771 | const bt_value *no_session_param) | |
1772 | { | |
1773 | enum session_not_found_action action; | |
a0df3abf SM |
1774 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
1775 | ||
bb18709b FD |
1776 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
1777 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1778 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1779 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
bb18709b | 1780 | } else { |
a0df3abf SM |
1781 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
1782 | action = SESSION_NOT_FOUND_ACTION_END; | |
bb18709b FD |
1783 | } |
1784 | ||
1785 | return action; | |
1786 | } | |
1787 | ||
a0df3abf SM |
1788 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
1789 | .type = BT_VALUE_TYPE_STRING, | |
1790 | }; | |
1791 | ||
1792 | static const char *sess_not_found_action_choices[] = { | |
1793 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1794 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1795 | SESS_NOT_FOUND_ACTION_END_STR, | |
1796 | }; | |
1797 | ||
1798 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
1799 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
1800 | .min_length = 1, | |
1801 | .max_length = 1, | |
1802 | .element_type = &inputs_elem_descr, | |
1803 | } } }, | |
1804 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
1805 | .choices = sess_not_found_action_choices, | |
1806 | } } }, | |
1807 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1808 | }; | |
1809 | ||
9e660428 | 1810 | static |
a0df3abf SM |
1811 | bt_component_class_initialize_method_status lttng_live_component_create( |
1812 | const bt_value *params, | |
1813 | bt_logging_level log_level, | |
1814 | bt_self_component *self_comp, | |
1815 | struct lttng_live_component **component) | |
7cdc2bab | 1816 | { |
a0df3abf | 1817 | struct lttng_live_component *lttng_live = NULL; |
90fda045 PP |
1818 | const bt_value *inputs_value; |
1819 | const bt_value *url_value; | |
1820 | const bt_value *value; | |
7cdc2bab | 1821 | const char *url; |
a0df3abf SM |
1822 | enum bt_param_validation_status validation_status; |
1823 | gchar *validation_error = NULL; | |
1824 | bt_component_class_initialize_method_status status; | |
1825 | ||
1826 | validation_status = bt_param_validation_validate(params, params_descr, | |
1827 | &validation_error); | |
1828 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1829 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
1830 | goto error; | |
1831 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
1832 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
1833 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
1834 | goto error; | |
1835 | } | |
7cdc2bab MD |
1836 | |
1837 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1838 | if (!lttng_live) { | |
a0df3abf | 1839 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1840 | goto end; |
1841 | } | |
1c0ceb65 | 1842 | lttng_live->log_level = log_level; |
5278d5ba | 1843 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1844 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
bb18709b FD |
1845 | lttng_live->has_msg_iter = false; |
1846 | ||
a0df3abf SM |
1847 | inputs_value = |
1848 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
1849 | url_value = | |
1850 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
90fda045 | 1851 | url = bt_value_string_get(url_value); |
a0df3abf | 1852 | |
bb18709b FD |
1853 | lttng_live->params.url = g_string_new(url); |
1854 | if (!lttng_live->params.url) { | |
a0df3abf | 1855 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1856 | goto error; |
1857 | } | |
bb18709b FD |
1858 | |
1859 | value = bt_value_map_borrow_entry_value_const(params, | |
1860 | SESS_NOT_FOUND_ACTION_PARAM); | |
90fda045 | 1861 | if (value) { |
bb18709b FD |
1862 | lttng_live->params.sess_not_found_act = |
1863 | parse_session_not_found_action_param(value); | |
bb18709b | 1864 | } else { |
90fda045 PP |
1865 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1866 | "defaulting to `%s`.", | |
bb18709b FD |
1867 | SESS_NOT_FOUND_ACTION_PARAM, |
1868 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1869 | lttng_live->params.sess_not_found_act = | |
1870 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1871 | } |
4c66436f | 1872 | |
a0df3abf | 1873 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
1874 | goto end; |
1875 | ||
1876 | error: | |
1877 | lttng_live_component_destroy_data(lttng_live); | |
1878 | lttng_live = NULL; | |
1879 | end: | |
a0df3abf SM |
1880 | g_free(validation_error); |
1881 | ||
1882 | *component = lttng_live; | |
1883 | return status; | |
d3e4dcd8 PP |
1884 | } |
1885 | ||
f3bc2010 | 1886 | BT_HIDDEN |
4175c1d5 | 1887 | bt_component_class_initialize_method_status lttng_live_component_init( |
1c0ceb65 | 1888 | bt_self_component_source *self_comp_src, |
e3250e61 SM |
1889 | bt_self_component_source_configuration *config, |
1890 | const bt_value *params, | |
1891 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1892 | { |
7cdc2bab | 1893 | struct lttng_live_component *lttng_live; |
a0df3abf | 1894 | bt_component_class_initialize_method_status ret; |
1c0ceb65 PP |
1895 | bt_self_component *self_comp = |
1896 | bt_self_component_source_as_self_component(self_comp_src); | |
1897 | bt_logging_level log_level = bt_component_get_logging_level( | |
1898 | bt_self_component_as_component(self_comp)); | |
fb25b9e3 | 1899 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1900 | |
a0df3abf SM |
1901 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
1902 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
059e3940 | 1903 | goto error; |
7cdc2bab MD |
1904 | } |
1905 | ||
fb25b9e3 PP |
1906 | add_port_status = bt_self_component_source_add_output_port( |
1907 | self_comp_src, "out", NULL, NULL); | |
a0df3abf SM |
1908 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
1909 | ret = (int) add_port_status; | |
1910 | goto end; | |
147337a3 | 1911 | } |
7cdc2bab | 1912 | |
1c0ceb65 | 1913 | bt_self_component_set_data(self_comp, lttng_live); |
059e3940 | 1914 | goto end; |
7cdc2bab | 1915 | |
059e3940 FD |
1916 | error: |
1917 | lttng_live_component_destroy_data(lttng_live); | |
1918 | lttng_live = NULL; | |
7cdc2bab MD |
1919 | end: |
1920 | return ret; | |
d85ef162 | 1921 | } |