Commit | Line | Data |
---|---|---|
f3bc2010 JG |
1 | /* |
2 | * lttng-live.c | |
3 | * | |
4 | * Babeltrace CTF LTTng-live Client Component | |
5 | * | |
14f28187 | 6 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
f3bc2010 | 7 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
7cdc2bab | 8 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 JG |
9 | * |
10 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
11 | * | |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
25 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
28 | * SOFTWARE. | |
29 | */ | |
30 | ||
2ece7dd0 | 31 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 32 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 33 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE" |
d9c39b0a | 34 | #include "logging/comp-logging.h" |
020bc26f | 35 | |
14f28187 | 36 | #include <inttypes.h> |
c4f23e30 | 37 | #include <stdbool.h> |
14f28187 FD |
38 | #include <unistd.h> |
39 | ||
3c22a242 FD |
40 | #include <glib.h> |
41 | ||
578e048b | 42 | #include "common/assert.h" |
3fadfbc0 | 43 | #include <babeltrace2/babeltrace.h> |
578e048b | 44 | #include "compat/compiler.h" |
3fadfbc0 | 45 | #include <babeltrace2/types.h> |
f3bc2010 | 46 | |
376fc2bd | 47 | #include "plugins/common/muxing/muxing.h" |
80aff5ef | 48 | #include "plugins/common/param-validation/param-validation.h" |
376fc2bd | 49 | |
7cdc2bab MD |
50 | #include "data-stream.h" |
51 | #include "metadata.h" | |
14f28187 | 52 | #include "lttng-live.h" |
7cdc2bab | 53 | |
14f28187 FD |
54 | #define MAX_QUERY_SIZE (256*1024) |
55 | #define URL_PARAM "url" | |
312df793 | 56 | #define INPUTS_PARAM "inputs" |
14f28187 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 | |
2ece7dd0 | 62 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 63 | |
14f28187 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: | |
498e7994 | 85 | bt_common_abort(); |
14f28187 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 | |
14f28187 FD |
108 | #define print_stream_state(live_stream_iter) \ |
109 | do { \ | |
2ece7dd0 | 110 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
14f28187 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 | |
9b4f9b42 | 118 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 119 | { |
14f28187 | 120 | bool ret; |
6f79a7cf | 121 | |
9b4f9b42 | 122 | if (!msg_iter) { |
14f28187 FD |
123 | ret = false; |
124 | goto end; | |
7cdc2bab | 125 | } |
7cdc2bab | 126 | |
9b4f9b42 PP |
127 | ret = bt_self_message_iterator_is_interrupted( |
128 | msg_iter->self_msg_iter); | |
4bf0e537 | 129 | |
14f28187 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 | { |
14f28187 FD |
138 | uint64_t trace_idx; |
139 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 140 | |
14f28187 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) { |
14f28187 FD |
145 | ret_trace = trace; |
146 | goto end; | |
7cdc2bab MD |
147 | } |
148 | } | |
14f28187 FD |
149 | |
150 | end: | |
151 | return ret_trace; | |
d3eb6e8f PP |
152 | } |
153 | ||
7cdc2bab | 154 | static |
14f28187 | 155 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 156 | { |
c01594de | 157 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 158 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 159 | |
2ece7dd0 | 160 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 161 | |
14f28187 FD |
162 | BT_ASSERT(trace->stream_iterators); |
163 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 164 | |
14f28187 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; | |
c01594de | 177 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 178 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab MD |
179 | |
180 | trace = g_new0(struct lttng_live_trace, 1); | |
181 | if (!trace) { | |
1419db2b FD |
182 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
183 | "Failed to allocate live trace"); | |
7cdc2bab MD |
184 | goto error; |
185 | } | |
c01594de | 186 | trace->log_level = session->log_level; |
2ece7dd0 | 187 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
188 | trace->session = session; |
189 | trace->id = trace_id; | |
14f28187 FD |
190 | trace->trace_class = NULL; |
191 | trace->trace = NULL; | |
192 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0f1979c3 | 193 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
14f28187 | 194 | BT_ASSERT(trace->stream_iterators); |
7cdc2bab | 195 | trace->new_metadata_needed = true; |
14f28187 FD |
196 | g_ptr_array_add(session->traces, trace); |
197 | ||
2ece7dd0 | 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 | |
14f28187 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) { | |
14f28187 | 215 | goto end; |
7cdc2bab | 216 | } |
7cdc2bab | 217 | |
14f28187 FD |
218 | /* The session is the owner of the newly created trace. */ |
219 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 220 | |
14f28187 FD |
221 | end: |
222 | return trace; | |
7cdc2bab MD |
223 | } |
224 | ||
225 | BT_HIDDEN | |
14f28187 | 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; | |
14f28187 | 231 | struct lttng_live_session *session; |
c01594de | 232 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 233 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 234 | |
14f28187 FD |
235 | session = g_new0(struct lttng_live_session, 1); |
236 | if (!session) { | |
1419db2b FD |
237 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
238 | "Failed to allocate live session"); | |
7cdc2bab MD |
239 | goto error; |
240 | } | |
241 | ||
c01594de | 242 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 243 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
244 | session->id = session_id; |
245 | session->traces = g_ptr_array_new_with_free_func( | |
0f1979c3 | 246 | (GDestroyNotify) lttng_live_destroy_trace); |
14f28187 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 | |
2ece7dd0 | 256 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
14f28187 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: | |
1419db2b | 261 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Error adding session"); |
14f28187 | 262 | g_free(session); |
7cdc2bab MD |
263 | ret = -1; |
264 | end: | |
265 | return ret; | |
266 | } | |
267 | ||
268 | static | |
269 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
270 | { | |
c01594de | 271 | bt_logging_level log_level; |
2ece7dd0 | 272 | bt_self_component *self_comp; |
14f28187 FD |
273 | |
274 | if (!session) { | |
275 | goto end; | |
276 | } | |
7cdc2bab | 277 | |
c01594de | 278 | log_level = session->log_level; |
2ece7dd0 PP |
279 | self_comp = session->self_comp; |
280 | BT_COMP_LOGD("Destroy lttng live session"); | |
7cdc2bab MD |
281 | if (session->id != -1ULL) { |
282 | if (lttng_live_detach_session(session)) { | |
0757916e FD |
283 | if (!lttng_live_graph_is_canceled( |
284 | session->lttng_live_msg_iter)) { | |
4c66436f | 285 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 286 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
287 | session->id); |
288 | } | |
7cdc2bab MD |
289 | } |
290 | session->id = -1ULL; | |
291 | } | |
14f28187 FD |
292 | |
293 | if (session->traces) { | |
294 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 295 | } |
14f28187 | 296 | |
06994c71 MD |
297 | if (session->hostname) { |
298 | g_string_free(session->hostname, TRUE); | |
299 | } | |
300 | if (session->session_name) { | |
301 | g_string_free(session->session_name, TRUE); | |
302 | } | |
7cdc2bab | 303 | g_free(session); |
14f28187 FD |
304 | |
305 | end: | |
306 | return; | |
7cdc2bab MD |
307 | } |
308 | ||
14f28187 FD |
309 | static |
310 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 311 | { |
14f28187 FD |
312 | if (!lttng_live_msg_iter) { |
313 | goto end; | |
7cdc2bab | 314 | } |
7cdc2bab | 315 | |
14f28187 FD |
316 | if (lttng_live_msg_iter->sessions) { |
317 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 318 | } |
14f28187 | 319 | |
b9e6ec43 FD |
320 | if (lttng_live_msg_iter->viewer_connection) { |
321 | live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection); | |
322 | } | |
14f28187 FD |
323 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); |
324 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
325 | ||
326 | /* All stream iterators must be destroyed at this point. */ | |
327 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
328 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
329 | ||
330 | g_free(lttng_live_msg_iter); | |
331 | ||
332 | end: | |
333 | return; | |
334 | } | |
335 | ||
336 | BT_HIDDEN | |
337 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
338 | { | |
339 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
340 | ||
341 | BT_ASSERT(self_msg_iter); | |
342 | ||
343 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
344 | BT_ASSERT(lttng_live_msg_iter); | |
345 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
346 | } |
347 | ||
348 | static | |
14f28187 | 349 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
350 | struct lttng_live_stream_iterator *lttng_live_stream) |
351 | { | |
c01594de | 352 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 353 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 354 | |
7cdc2bab MD |
355 | switch (lttng_live_stream->state) { |
356 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
357 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
358 | break; | |
359 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
360 | /* Invalid state. */ | |
2ece7dd0 | 361 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
498e7994 | 362 | bt_common_abort(); |
7cdc2bab MD |
363 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
364 | /* Invalid state. */ | |
2ece7dd0 | 365 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
498e7994 | 366 | bt_common_abort(); |
7cdc2bab MD |
367 | case LTTNG_LIVE_STREAM_EOF: |
368 | break; | |
369 | } | |
14f28187 | 370 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
371 | } |
372 | ||
373 | /* | |
374 | * For active no data stream, fetch next data. It can be either: | |
375 | * - quiescent: need to put it in the prio heap at quiescent end | |
376 | * timestamp, | |
377 | * - have data: need to wire up first event into the prio heap, | |
378 | * - have no data on this stream at this point: need to retry (AGAIN) or | |
379 | * return EOF. | |
380 | */ | |
381 | static | |
14f28187 FD |
382 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
383 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
384 | struct lttng_live_stream_iterator *lttng_live_stream) |
385 | { | |
c01594de | 386 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 387 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 | 388 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 389 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
0f1979c3 | 390 | struct packet_index index; |
7cdc2bab MD |
391 | |
392 | if (lttng_live_stream->trace->new_metadata_needed) { | |
14f28187 | 393 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
394 | goto end; |
395 | } | |
396 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
14f28187 | 397 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
398 | goto end; |
399 | } | |
14f28187 FD |
400 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
401 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
402 | goto end; |
403 | } | |
14f28187 FD |
404 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
405 | &index); | |
406 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
7cdc2bab MD |
407 | goto end; |
408 | } | |
98b15851 | 409 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 410 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 FD |
411 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
412 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
413 | ||
414 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
415 | last_inact_ts == curr_inact_ts) { | |
416 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
7cdc2bab MD |
417 | print_stream_state(lttng_live_stream); |
418 | } else { | |
14f28187 | 419 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
420 | } |
421 | goto end; | |
422 | } | |
423 | lttng_live_stream->base_offset = index.offset; | |
424 | lttng_live_stream->offset = index.offset; | |
425 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
426 | end: | |
14f28187 FD |
427 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
428 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
429 | } |
430 | return ret; | |
431 | } | |
432 | ||
433 | /* | |
14f28187 FD |
434 | * Creation of the message requires the ctf trace class to be created |
435 | * beforehand, but the live protocol gives us all streams (including metadata) | |
436 | * at once. So we split it in three steps: getting streams, getting metadata | |
437 | * (which creates the ctf trace class), and then creating the per-stream | |
438 | * messages. | |
7cdc2bab MD |
439 | */ |
440 | static | |
14f28187 FD |
441 | enum lttng_live_iterator_status lttng_live_get_session( |
442 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
443 | struct lttng_live_session *session) |
444 | { | |
1419db2b FD |
445 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
446 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
447 | enum lttng_live_iterator_status status; |
448 | uint64_t trace_idx; | |
7cdc2bab | 449 | |
14f28187 | 450 | if (!session->attached) { |
eee8e741 FD |
451 | enum lttng_live_attach_session_status attach_status = |
452 | lttng_live_attach_session(session); | |
453 | if (attach_status != LTTNG_LIVE_ATTACH_SESSION_STATUS_OK) { | |
0757916e | 454 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
1419db2b 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(); | |
14f28187 FD |
462 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
463 | } else { | |
464 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1419db2b FD |
465 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
466 | "Error attaching to LTTng live session"); | |
14f28187 FD |
467 | } |
468 | goto end; | |
4c66436f | 469 | } |
7cdc2bab | 470 | } |
14f28187 | 471 | |
7cdc2bab | 472 | status = lttng_live_get_new_streams(session); |
14f28187 FD |
473 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
474 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
475 | goto end; | |
7cdc2bab | 476 | } |
c28512ab FD |
477 | trace_idx = 0; |
478 | while (trace_idx < session->traces->len) { | |
14f28187 FD |
479 | struct lttng_live_trace *trace = |
480 | g_ptr_array_index(session->traces, trace_idx); | |
481 | ||
7cdc2bab | 482 | status = lttng_live_metadata_update(trace); |
c28512ab FD |
483 | switch (status) { |
484 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
485 | trace_idx++; | |
486 | break; | |
487 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
488 | /* | |
489 | * The trace has ended. Remove it of the array an | |
490 | * continue the iteration. | |
491 | * We can remove the trace safely when using the | |
492 | * g_ptr_array_remove_index_fast because it replaces | |
493 | * the element at trace_idx with the array's last | |
494 | * element. trace_idx is not incremented because of | |
495 | * that. | |
496 | */ | |
497 | (void) g_ptr_array_remove_index_fast(session->traces, | |
498 | trace_idx); | |
499 | break; | |
500 | default: | |
14f28187 | 501 | goto end; |
7cdc2bab MD |
502 | } |
503 | } | |
14f28187 FD |
504 | status = lttng_live_lazy_msg_init(session); |
505 | ||
506 | end: | |
507 | return status; | |
7cdc2bab MD |
508 | } |
509 | ||
510 | BT_HIDDEN | |
14f28187 | 511 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 512 | { |
14f28187 | 513 | uint64_t session_idx; |
7cdc2bab | 514 | |
14f28187 FD |
515 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
516 | session_idx++) { | |
517 | struct lttng_live_session *session = | |
518 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
519 | session->new_streams_needed = true; |
520 | } | |
521 | } | |
522 | ||
523 | static | |
14f28187 | 524 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 525 | { |
14f28187 | 526 | uint64_t session_idx, trace_idx; |
7cdc2bab | 527 | |
14f28187 FD |
528 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
529 | session_idx++) { | |
530 | struct lttng_live_session *session = | |
531 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 532 | session->new_streams_needed = true; |
14f28187 FD |
533 | for (trace_idx = 0; trace_idx < session->traces->len; |
534 | trace_idx++) { | |
535 | struct lttng_live_trace *trace = | |
536 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
537 | trace->new_metadata_needed = true; |
538 | } | |
539 | } | |
540 | } | |
541 | ||
542 | static | |
14f28187 FD |
543 | enum lttng_live_iterator_status |
544 | lttng_live_iterator_handle_new_streams_and_metadata( | |
545 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 546 | { |
0f1979c3 | 547 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1419db2b FD |
548 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
549 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
550 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
551 | struct lttng_live_session *session; | |
552 | enum session_not_found_action sess_not_found_act = | |
553 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
554 | ||
7cdc2bab | 555 | /* |
14f28187 | 556 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
557 | * session" flag to the protocol, which would tell us that we |
558 | * need to query for new sessions even though we have sessions | |
559 | * currently ongoing. | |
560 | */ | |
14f28187 FD |
561 | if (lttng_live_msg_iter->sessions->len == 0) { |
562 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
563 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
564 | goto end; | |
565 | } else { | |
566 | /* | |
567 | * Retry to create a viewer session for the requested | |
568 | * session name. | |
569 | */ | |
570 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
571 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1419db2b FD |
572 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
573 | "Error creating LTTng live viewer session"); | |
14f28187 FD |
574 | goto end; |
575 | } | |
576 | } | |
7cdc2bab | 577 | } |
14f28187 FD |
578 | |
579 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
580 | session_idx++) { | |
581 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
582 | session_idx); | |
583 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 584 | switch (ret) { |
14f28187 | 585 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 586 | break; |
14f28187 FD |
587 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
588 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
589 | break; |
590 | default: | |
591 | goto end; | |
592 | } | |
593 | if (!session->closed) { | |
594 | nr_sessions_opened++; | |
595 | } | |
596 | } | |
597 | end: | |
14f28187 FD |
598 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
599 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
600 | nr_sessions_opened == 0) { | |
601 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
602 | } |
603 | return ret; | |
604 | } | |
605 | ||
606 | static | |
14f28187 FD |
607 | enum lttng_live_iterator_status emit_inactivity_message( |
608 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
609 | struct lttng_live_stream_iterator *stream_iter, | |
610 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 611 | { |
0f1979c3 | 612 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1419db2b FD |
613 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
614 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 615 | bt_message *msg = NULL; |
7cdc2bab | 616 | |
14f28187 FD |
617 | BT_ASSERT(stream_iter->trace->clock_class); |
618 | ||
619 | msg = bt_message_message_iterator_inactivity_create( | |
0f1979c3 FD |
620 | lttng_live_msg_iter->self_msg_iter, |
621 | stream_iter->trace->clock_class, timestamp); | |
d6e69534 | 622 | if (!msg) { |
1419db2b FD |
623 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
624 | "Error emitting message iterator inactivity message"); | |
7cdc2bab MD |
625 | goto error; |
626 | } | |
14f28187 | 627 | |
d6e69534 | 628 | *message = msg; |
7cdc2bab | 629 | end: |
7cdc2bab MD |
630 | return ret; |
631 | ||
632 | error: | |
14f28187 | 633 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 634 | bt_message_put_ref(msg); |
7cdc2bab MD |
635 | goto end; |
636 | } | |
637 | ||
638 | static | |
14f28187 FD |
639 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
640 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 641 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 642 | bt_message **message) |
7cdc2bab | 643 | { |
0f1979c3 | 644 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
645 | |
646 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 647 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
648 | } |
649 | ||
14f28187 FD |
650 | if (lttng_live_stream->current_inactivity_ts == |
651 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 652 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
14f28187 FD |
653 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
654 | goto end; | |
655 | } | |
656 | ||
657 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0f1979c3 | 658 | message, lttng_live_stream->current_inactivity_ts); |
14f28187 FD |
659 | |
660 | lttng_live_stream->last_inactivity_ts = | |
0f1979c3 | 661 | lttng_live_stream->current_inactivity_ts; |
14f28187 FD |
662 | end: |
663 | return ret; | |
664 | } | |
665 | ||
666 | static | |
667 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
668 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
669 | const bt_message *msg, int64_t last_msg_ts_ns, | |
670 | int64_t *ts_ns) | |
671 | { | |
672 | const bt_clock_class *clock_class = NULL; | |
673 | const bt_clock_snapshot *clock_snapshot = NULL; | |
674 | int ret = 0; | |
c01594de | 675 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 676 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 677 | |
98b15851 PP |
678 | BT_ASSERT_DBG(msg); |
679 | BT_ASSERT_DBG(ts_ns); | |
14f28187 | 680 | |
2ece7dd0 | 681 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
682 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
683 | last_msg_ts_ns); | |
684 | ||
685 | switch (bt_message_get_type(msg)) { | |
686 | case BT_MESSAGE_TYPE_EVENT: | |
0f1979c3 | 687 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
14f28187 | 688 | msg); |
98b15851 | 689 | BT_ASSERT_DBG(clock_class); |
14f28187 | 690 | |
0cbc2c33 PP |
691 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
692 | msg); | |
14f28187 FD |
693 | break; |
694 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0f1979c3 | 695 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
696 | msg); |
697 | BT_ASSERT(clock_class); | |
698 | ||
0cbc2c33 PP |
699 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
700 | msg); | |
14f28187 FD |
701 | break; |
702 | case BT_MESSAGE_TYPE_PACKET_END: | |
0f1979c3 | 703 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
704 | msg); |
705 | BT_ASSERT(clock_class); | |
706 | ||
0cbc2c33 PP |
707 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
708 | msg); | |
14f28187 FD |
709 | break; |
710 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0f1979c3 | 711 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
712 | msg); |
713 | BT_ASSERT(clock_class); | |
714 | ||
9b24b6aa | 715 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 716 | msg); |
14f28187 FD |
717 | break; |
718 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0f1979c3 | 719 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
720 | msg); |
721 | BT_ASSERT(clock_class); | |
722 | ||
9b24b6aa | 723 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 724 | msg); |
14f28187 | 725 | break; |
14f28187 | 726 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0f1979c3 FD |
727 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
728 | msg); | |
14f28187 FD |
729 | break; |
730 | default: | |
731 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 732 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 733 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
734 | goto end; |
735 | } | |
736 | ||
14f28187 | 737 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
98b15851 | 738 | BT_ASSERT_DBG(clock_class); |
14f28187 FD |
739 | |
740 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
741 | if (ret) { | |
1419db2b FD |
742 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
743 | "Cannot get nanoseconds from Epoch of clock snapshot: " | |
14f28187 FD |
744 | "clock-snapshot-addr=%p", clock_snapshot); |
745 | goto error; | |
746 | } | |
747 | ||
748 | goto end; | |
749 | ||
14f28187 FD |
750 | error: |
751 | ret = -1; | |
7cdc2bab | 752 | |
7cdc2bab | 753 | end: |
14f28187 | 754 | if (ret == 0) { |
2ece7dd0 | 755 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
756 | "iter-data-addr=%p, msg-addr=%p, " |
757 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
758 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
759 | } | |
760 | ||
7cdc2bab MD |
761 | return ret; |
762 | } | |
763 | ||
764 | static | |
14f28187 FD |
765 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
766 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 767 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 768 | bt_message **message) |
7cdc2bab | 769 | { |
14f28187 | 770 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
c01594de | 771 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 772 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 FD |
773 | enum bt_msg_iter_status status; |
774 | uint64_t session_idx, trace_idx; | |
7cdc2bab | 775 | |
14f28187 FD |
776 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
777 | session_idx++) { | |
778 | struct lttng_live_session *session = | |
779 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
780 | |
781 | if (session->new_streams_needed) { | |
14f28187 FD |
782 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
783 | goto end; | |
7cdc2bab | 784 | } |
14f28187 FD |
785 | for (trace_idx = 0; trace_idx < session->traces->len; |
786 | trace_idx++) { | |
787 | struct lttng_live_trace *trace = | |
788 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 789 | if (trace->new_metadata_needed) { |
14f28187 FD |
790 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
791 | goto end; | |
7cdc2bab MD |
792 | } |
793 | } | |
794 | } | |
795 | ||
796 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 FD |
797 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
798 | goto end; | |
7cdc2bab | 799 | } |
14f28187 FD |
800 | |
801 | status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter, | |
802 | lttng_live_msg_iter->self_msg_iter, message); | |
7cdc2bab | 803 | switch (status) { |
d6e69534 | 804 | case BT_MSG_ITER_STATUS_EOF: |
14f28187 | 805 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 806 | break; |
d6e69534 | 807 | case BT_MSG_ITER_STATUS_OK: |
14f28187 | 808 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 809 | break; |
d6e69534 | 810 | case BT_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
811 | /* |
812 | * Continue immediately (end of packet). The next | |
813 | * get_index may return AGAIN to delay the following | |
814 | * attempt. | |
815 | */ | |
14f28187 | 816 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 817 | break; |
d6e69534 | 818 | case BT_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 819 | /* No argument provided by the user, so don't return INVAL. */ |
d6e69534 | 820 | case BT_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 821 | default: |
14f28187 | 822 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1419db2b FD |
823 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
824 | "CTF message iterator return an error or failed: " | |
825 | "msg_iter=%p", lttng_live_stream->msg_iter); | |
7cdc2bab MD |
826 | break; |
827 | } | |
14f28187 FD |
828 | |
829 | end: | |
7cdc2bab MD |
830 | return ret; |
831 | } | |
832 | ||
4a39caef FD |
833 | static |
834 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
835 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
836 | struct lttng_live_stream_iterator *stream_iter, | |
837 | bt_message **curr_msg) | |
838 | { | |
839 | enum lttng_live_iterator_status live_status = | |
840 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1419db2b FD |
841 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
842 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
4a39caef FD |
843 | /* |
844 | * The viewer has hung up on us so we are closing the stream. The | |
845 | * `bt_msg_iter` should simply realize that it needs to close the | |
846 | * stream properly by emitting the necessary stream end message. | |
847 | */ | |
0f1979c3 FD |
848 | enum bt_msg_iter_status status = bt_msg_iter_get_next_message( |
849 | stream_iter->msg_iter, lttng_live_msg_iter->self_msg_iter, | |
850 | curr_msg); | |
4a39caef FD |
851 | |
852 | if (status == BT_MSG_ITER_STATUS_ERROR) { | |
1419db2b FD |
853 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
854 | "Error getting the next message from CTF message iterator"); | |
4a39caef FD |
855 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
856 | goto end; | |
857 | } | |
858 | ||
859 | BT_ASSERT(status == BT_MSG_ITER_STATUS_OK); | |
860 | ||
861 | end: | |
862 | return live_status; | |
863 | } | |
864 | ||
7cdc2bab MD |
865 | /* |
866 | * helper function: | |
867 | * handle_no_data_streams() | |
868 | * retry: | |
869 | * - for each ACTIVE_NO_DATA stream: | |
870 | * - query relayd for stream data, or quiescence info. | |
871 | * - if need metadata, get metadata, goto retry. | |
872 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
873 | * - if quiescent, move to QUIESCENT streams | |
874 | * - if fetched data, move to ACTIVE_DATA streams | |
875 | * (at this point each stream either has data, or is quiescent) | |
876 | * | |
877 | * | |
878 | * iterator_next: | |
879 | * handle_new_streams_and_metadata() | |
880 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
881 | * - query relayd for metadata | |
882 | * | |
883 | * call handle_active_no_data_streams() | |
884 | * | |
885 | * handle_quiescent_streams() | |
886 | * - if at least one stream is ACTIVE_DATA: | |
887 | * - peek stream event with lowest timestamp -> next_ts | |
888 | * - for each quiescent stream | |
889 | * - if next_ts >= quiescent end | |
890 | * - set state to ACTIVE_NO_DATA | |
891 | * - else | |
892 | * - for each quiescent stream | |
893 | * - set state to ACTIVE_NO_DATA | |
894 | * | |
895 | * call handle_active_no_data_streams() | |
896 | * | |
897 | * handle_active_data_streams() | |
898 | * - if at least one stream is ACTIVE_DATA: | |
899 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 900 | * - make that stream event the current message. |
7cdc2bab MD |
901 | * - move this stream heap position to its next event |
902 | * - if we need to fetch data from relayd, move | |
903 | * stream to ACTIVE_NO_DATA. | |
904 | * - return OK | |
905 | * - return AGAIN | |
906 | * | |
907 | * end criterion: ctrl-c on client. If relayd exits or the session | |
908 | * closes on the relay daemon side, we keep on waiting for streams. | |
909 | * Eventually handle --end timestamp (also an end criterion). | |
910 | * | |
911 | * When disconnected from relayd: try to re-connect endlessly. | |
912 | */ | |
913 | static | |
a31f4d8b | 914 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
915 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
916 | struct lttng_live_stream_iterator *stream_iter, | |
917 | bt_message **curr_msg) | |
7cdc2bab | 918 | { |
c01594de | 919 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 920 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 921 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 922 | |
4a39caef FD |
923 | if (stream_iter->has_stream_hung_up) { |
924 | /* | |
925 | * The stream has hung up and the stream was properly closed | |
926 | * during the last call to the current function. Return _END | |
927 | * status now so that this stream iterator is removed for the | |
928 | * stream iterator list. | |
929 | */ | |
930 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
931 | goto end; | |
932 | } | |
933 | ||
7cdc2bab MD |
934 | retry: |
935 | print_stream_state(stream_iter); | |
14f28187 | 936 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0f1979c3 | 937 | lttng_live_msg_iter); |
14f28187 | 938 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
939 | goto end; |
940 | } | |
14f28187 | 941 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0f1979c3 | 942 | lttng_live_msg_iter, stream_iter); |
4a39caef | 943 | |
14f28187 | 944 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
945 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
946 | /* | |
947 | * We overwrite `live_status` since `curr_msg` is | |
948 | * likely set to a valid message in this function. | |
949 | */ | |
950 | live_status = lttng_live_iterator_close_stream( | |
951 | lttng_live_msg_iter, stream_iter, curr_msg); | |
952 | } | |
7cdc2bab MD |
953 | goto end; |
954 | } | |
14f28187 | 955 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0f1979c3 | 956 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 957 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 958 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
959 | goto end; |
960 | } | |
14f28187 | 961 | if (*curr_msg) { |
7cdc2bab MD |
962 | goto end; |
963 | } | |
14f28187 | 964 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0f1979c3 | 965 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 966 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 967 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
968 | } |
969 | ||
970 | end: | |
14f28187 | 971 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 972 | goto retry; |
7cdc2bab | 973 | } |
14f28187 FD |
974 | |
975 | return live_status; | |
7cdc2bab MD |
976 | } |
977 | ||
978 | static | |
14f28187 FD |
979 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
980 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
981 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 982 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 983 | { |
a31f4d8b | 984 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0f1979c3 FD |
985 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
986 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 987 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 988 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 989 | uint64_t stream_iter_idx; |
7cdc2bab | 990 | |
98b15851 PP |
991 | BT_ASSERT_DBG(live_trace); |
992 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
14f28187 FD |
993 | /* |
994 | * Update the current message of every stream iterators of this trace. | |
995 | * The current msg of every stream must have a timestamp equal or | |
996 | * larger than the last message returned by this iterator. We must | |
997 | * ensure monotonicity. | |
998 | */ | |
999 | stream_iter_idx = 0; | |
1000 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
1001 | bool stream_iter_is_ended = false; | |
1002 | struct lttng_live_stream_iterator *stream_iter = | |
1003 | g_ptr_array_index(live_trace->stream_iterators, | |
0f1979c3 | 1004 | stream_iter_idx); |
14f28187 FD |
1005 | |
1006 | /* | |
1007 | * Find if there is are now current message for this stream | |
1008 | * iterator get it. | |
1009 | */ | |
1010 | while (!stream_iter->current_msg) { | |
1011 | bt_message *msg = NULL; | |
1012 | int64_t curr_msg_ts_ns = INT64_MAX; | |
a31f4d8b | 1013 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0f1979c3 | 1014 | lttng_live_msg_iter, stream_iter, &msg); |
14f28187 | 1015 | |
2ece7dd0 | 1016 | BT_COMP_LOGD("live stream iterator returned status :%s", |
0f1979c3 | 1017 | print_live_iterator_status(stream_iter_status)); |
14f28187 FD |
1018 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1019 | stream_iter_is_ended = true; | |
1020 | break; | |
1021 | } | |
1022 | ||
1023 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1024 | goto end; | |
1025 | } | |
1026 | ||
98b15851 | 1027 | BT_ASSERT_DBG(msg); |
14f28187 FD |
1028 | |
1029 | /* | |
1030 | * Get the timestamp in nanoseconds from origin of this | |
1031 | * messsage. | |
1032 | */ | |
1033 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1034 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1035 | &curr_msg_ts_ns); | |
1036 | ||
1037 | /* | |
1038 | * Check if the message of the current live stream | |
1039 | * iterator occured at the exact same time or after the | |
1040 | * last message returned by this component's message | |
1041 | * iterator. If not, we return an error. | |
1042 | */ | |
1043 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1044 | stream_iter->current_msg = msg; | |
1045 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
1046 | } else { | |
1047 | /* | |
1048 | * We received a message in the past. To ensure | |
1049 | * monotonicity, we can't send it forward. | |
1050 | */ | |
1419db2b FD |
1051 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1052 | "Message's timestamp is less than " | |
14f28187 FD |
1053 | "lttng-live's message iterator's last " |
1054 | "returned timestamp: " | |
1055 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1056 | "last-msg-ts=%" PRId64, | |
1057 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1058 | lttng_live_msg_iter->last_msg_ts_ns); | |
1059 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1060 | goto end; | |
1061 | } | |
1062 | } | |
1063 | ||
98b15851 | 1064 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1065 | |
1066 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1067 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1068 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1069 | /* |
1070 | * Update the current best candidate message | |
1071 | * for the stream iterator of this live trace | |
1072 | * to be forwarded downstream. | |
1073 | */ | |
a31f4d8b FD |
1074 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1075 | youngest_candidate_stream_iter = stream_iter; | |
1076 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1077 | /* |
1078 | * Order the messages in an arbitrary but | |
1079 | * deterministic way. | |
1080 | */ | |
98b15851 | 1081 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1082 | int ret = common_muxing_compare_messages( |
1083 | stream_iter->current_msg, | |
a31f4d8b | 1084 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1085 | if (ret < 0) { |
1086 | /* | |
a31f4d8b | 1087 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1088 | * should go first. Update the next |
1089 | * iterator and the current timestamp. | |
1090 | */ | |
a31f4d8b FD |
1091 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1092 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1093 | } else if (ret == 0) { |
1094 | /* | |
1095 | * Unable to pick which one should go | |
1096 | * first. | |
1097 | */ | |
1098 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1099 | "stream-iter-addr=%p" | |
1100 | "stream-iter-addr=%p", | |
1101 | stream_iter, | |
a31f4d8b | 1102 | youngest_candidate_stream_iter); |
07afb6bc FD |
1103 | } |
1104 | } | |
14f28187 | 1105 | |
07afb6bc FD |
1106 | stream_iter_idx++; |
1107 | } else { | |
14f28187 | 1108 | /* |
fba9b58e JG |
1109 | * The live stream iterator has ended. That |
1110 | * iterator is removed from the array, but | |
1111 | * there is no need to increment | |
1112 | * stream_iter_idx as | |
1113 | * g_ptr_array_remove_index_fast replaces the | |
1114 | * removed element with the array's last | |
1115 | * element. | |
14f28187 | 1116 | */ |
fba9b58e JG |
1117 | g_ptr_array_remove_index_fast( |
1118 | live_trace->stream_iterators, | |
14f28187 | 1119 | stream_iter_idx); |
14f28187 FD |
1120 | } |
1121 | } | |
1122 | ||
a31f4d8b FD |
1123 | if (youngest_candidate_stream_iter) { |
1124 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1125 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1126 | } else { | |
1127 | /* | |
1128 | * The only case where we don't have a candidate for this trace | |
1129 | * is if we reached the end of all the iterators. | |
1130 | */ | |
1131 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1132 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1133 | } | |
1134 | ||
1135 | end: | |
1136 | return stream_iter_status; | |
1137 | } | |
1138 | ||
1139 | static | |
1140 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1141 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1142 | struct lttng_live_session *session, | |
a31f4d8b | 1143 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1144 | { |
07afb6bc FD |
1145 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1146 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1147 | enum lttng_live_iterator_status stream_iter_status; |
1148 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1149 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1150 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 FD |
1151 | |
1152 | /* | |
1153 | * Make sure we are attached to the session and look for new streams | |
1154 | * and metadata. | |
1155 | */ | |
1156 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1157 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1158 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1159 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1160 | goto end; |
1161 | } | |
14f28187 | 1162 | |
98b15851 | 1163 | BT_ASSERT_DBG(session->traces); |
14f28187 | 1164 | |
14f28187 FD |
1165 | while (trace_idx < session->traces->len) { |
1166 | bool trace_is_ended = false; | |
1167 | struct lttng_live_stream_iterator *stream_iter; | |
1168 | struct lttng_live_trace *trace = | |
1169 | g_ptr_array_index(session->traces, trace_idx); | |
1170 | ||
1171 | stream_iter_status = next_stream_iterator_for_trace( | |
1172 | lttng_live_msg_iter, trace, &stream_iter); | |
1173 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1174 | /* | |
1175 | * All the live stream iterators for this trace are | |
1176 | * ENDed. Remove the trace from this session. | |
1177 | */ | |
1178 | trace_is_ended = true; | |
1179 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1180 | goto end; | |
1181 | } | |
1182 | ||
1183 | if (!trace_is_ended) { | |
98b15851 | 1184 | BT_ASSERT_DBG(stream_iter); |
14f28187 | 1185 | |
a31f4d8b FD |
1186 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1187 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1188 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1189 | youngest_candidate_stream_iter = stream_iter; | |
1190 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1191 | /* |
1192 | * Order the messages in an arbitrary but | |
1193 | * deterministic way. | |
1194 | */ | |
1195 | int ret = common_muxing_compare_messages( | |
1196 | stream_iter->current_msg, | |
a31f4d8b | 1197 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1198 | if (ret < 0) { |
1199 | /* | |
a31f4d8b | 1200 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1201 | * should go first. Update the next iterator |
1202 | * and the current timestamp. | |
1203 | */ | |
a31f4d8b FD |
1204 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1205 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1206 | } else if (ret == 0) { |
1207 | /* Unable to pick which one should go first. */ | |
1208 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1209 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1210 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1211 | } |
14f28187 FD |
1212 | } |
1213 | trace_idx++; | |
1214 | } else { | |
ba90bce7 JG |
1215 | /* |
1216 | * trace_idx is not incremented since | |
1217 | * g_ptr_array_remove_index_fast replaces the | |
1218 | * element at trace_idx with the array's last element. | |
1219 | */ | |
1220 | g_ptr_array_remove_index_fast(session->traces, | |
1221 | trace_idx); | |
14f28187 FD |
1222 | } |
1223 | } | |
a31f4d8b FD |
1224 | if (youngest_candidate_stream_iter) { |
1225 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1226 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1227 | } else { |
14f28187 FD |
1228 | /* |
1229 | * The only cases where we don't have a candidate for this | |
1230 | * trace is: | |
1231 | * 1. if we reached the end of all the iterators of all the | |
1232 | * traces of this session, | |
1233 | * 2. if we never had live stream iterator in the first place. | |
1234 | * | |
1235 | * In either cases, we return END. | |
1236 | */ | |
1237 | BT_ASSERT(session->traces->len == 0); | |
1238 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1239 | } |
1240 | end: | |
14f28187 FD |
1241 | return stream_iter_status; |
1242 | } | |
1243 | ||
1244 | static inline | |
1245 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1246 | { | |
1247 | uint64_t i; | |
1248 | ||
1249 | for (i = 0; i < count; i++) { | |
1250 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1251 | } |
7cdc2bab MD |
1252 | } |
1253 | ||
d3eb6e8f | 1254 | BT_HIDDEN |
d24d5663 | 1255 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1256 | bt_self_message_iterator *self_msg_it, |
1257 | bt_message_array_const msgs, uint64_t capacity, | |
1258 | uint64_t *count) | |
d3eb6e8f | 1259 | { |
d24d5663 | 1260 | bt_component_class_message_iterator_next_method_status status; |
14f28187 FD |
1261 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1262 | bt_self_message_iterator_get_data(self_msg_it); | |
1263 | struct lttng_live_component *lttng_live = | |
1264 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1265 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1266 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1267 | enum lttng_live_iterator_status stream_iter_status; |
1268 | uint64_t session_idx; | |
1269 | ||
1270 | *count = 0; | |
1271 | ||
98b15851 | 1272 | BT_ASSERT_DBG(lttng_live_msg_iter); |
14f28187 FD |
1273 | |
1274 | /* | |
1275 | * Clear all the invalid message reference that might be left over in | |
1276 | * the output array. | |
1277 | */ | |
1278 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1279 | ||
1280 | /* | |
1281 | * If no session are exposed on the relay found at the url provided by | |
1282 | * the user, session count will be 0. In this case, we return status | |
1283 | * end to return gracefully. | |
1284 | */ | |
1285 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1286 | if (lttng_live->params.sess_not_found_act != | |
1287 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
d24d5663 | 1288 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
14f28187 FD |
1289 | goto no_session; |
1290 | } else { | |
1291 | /* | |
1292 | * The are no more active session for this session | |
1293 | * name. Retry to create a viewer session for the | |
1294 | * requested session name. | |
1295 | */ | |
1296 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
d24d5663 | 1297 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1298 | goto no_session; |
1299 | } | |
1300 | } | |
1301 | } | |
1302 | ||
1303 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1304 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Here the muxing of message is done. | |
1309 | * | |
1310 | * We need to iterate over all the streams of all the traces of all the | |
1311 | * viewer sessions in order to get the message with the smallest | |
1312 | * timestamp. In this case, a session is a viewer session and there is | |
1313 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1314 | * kernel). Each viewer session can have multiple traces, for example, | |
1315 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1316 | * | |
1317 | * We iterate over the streams of each traces to update and see what is | |
1318 | * their next message's timestamp. From those timestamps, we select the | |
1319 | * message with the smallest timestamp as the best candidate message | |
1320 | * for that trace and do the same thing across all the sessions. | |
1321 | * | |
1322 | * We then compare the timestamp of best candidate message of all the | |
1323 | * sessions to pick the message with the smallest timestamp and we | |
1324 | * return it. | |
1325 | */ | |
1326 | while (*count < capacity) { | |
a31f4d8b FD |
1327 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1328 | *candidate_stream_iter = NULL; | |
1329 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 | 1330 | |
98b15851 | 1331 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
14f28187 | 1332 | session_idx = 0; |
14f28187 FD |
1333 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1334 | struct lttng_live_session *session = | |
1335 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1336 | session_idx); | |
1337 | ||
1338 | /* Find the best candidate message to send downstream. */ | |
1339 | stream_iter_status = next_stream_iterator_for_session( | |
1340 | lttng_live_msg_iter, session, | |
1341 | &candidate_stream_iter); | |
1342 | ||
1343 | /* If we receive an END status, it means that either: | |
1344 | * - Those traces never had active streams (UST with no | |
1345 | * data produced yet), | |
1346 | * - All live stream iterators have ENDed.*/ | |
1347 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1348 | if (session->closed && session->traces->len == 0) { | |
1349 | /* | |
7d632b96 JG |
1350 | * Remove the session from the list. |
1351 | * session_idx is not modified since | |
1352 | * g_ptr_array_remove_index_fast | |
1353 | * replaces the the removed element with | |
1354 | * the array's last element. | |
14f28187 FD |
1355 | */ |
1356 | g_ptr_array_remove_index_fast( | |
1357 | lttng_live_msg_iter->sessions, | |
1358 | session_idx); | |
14f28187 FD |
1359 | } else { |
1360 | session_idx++; | |
1361 | } | |
1362 | continue; | |
1363 | } | |
1364 | ||
1365 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1366 | goto end; | |
1367 | } | |
1368 | ||
a31f4d8b | 1369 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1370 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1371 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1372 | youngest_stream_iter = candidate_stream_iter; | |
1373 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1374 | /* |
1375 | * The currently selected message to be sent | |
1376 | * downstream next has the exact same timestamp | |
1377 | * that of the current candidate message. We | |
1378 | * must break the tie in a predictable manner. | |
1379 | */ | |
1380 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1381 | /* | |
1382 | * Order the messages in an arbitrary but | |
07afb6bc | 1383 | * deterministic way. |
376fc2bd | 1384 | */ |
07afb6bc FD |
1385 | int ret = common_muxing_compare_messages( |
1386 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1387 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1388 | if (ret < 0) { |
1389 | /* | |
1390 | * The `candidate_stream_iter->current_msg` | |
1391 | * should go first. Update the next | |
1392 | * iterator and the current timestamp. | |
1393 | */ | |
a31f4d8b FD |
1394 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1395 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1396 | } else if (ret == 0) { |
1397 | /* Unable to pick which one should go first. */ | |
1398 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1399 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1400 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1401 | } |
14f28187 FD |
1402 | } |
1403 | ||
1404 | session_idx++; | |
1405 | } | |
1406 | ||
a31f4d8b | 1407 | if (!youngest_stream_iter) { |
14f28187 FD |
1408 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1409 | goto end; | |
1410 | } | |
1411 | ||
98b15851 | 1412 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
14f28187 | 1413 | /* Ensure monotonicity. */ |
98b15851 | 1414 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
a31f4d8b | 1415 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1416 | |
1417 | /* | |
1418 | * Insert the next message to the message batch. This will set | |
1419 | * stream iterator current messsage to NULL so that next time | |
1420 | * we fetch the next message of that stream iterator | |
1421 | */ | |
a31f4d8b | 1422 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1423 | (*count)++; |
1424 | ||
1425 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1426 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1427 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1428 | |
1429 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1430 | } | |
1431 | end: | |
1432 | switch (stream_iter_status) { | |
1433 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1434 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1435 | if (*count > 0) { | |
1436 | /* | |
1437 | * We received a again status but we have some messages | |
1438 | * to send downstream. We send them and return OK for | |
1439 | * now. On the next call we return again if there are | |
1440 | * still no new message to send. | |
1441 | */ | |
d24d5663 | 1442 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
14f28187 | 1443 | } else { |
d24d5663 | 1444 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1445 | } |
7cdc2bab | 1446 | break; |
14f28187 | 1447 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
d24d5663 | 1448 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1449 | break; |
14f28187 | 1450 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
d24d5663 | 1451 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1452 | break; |
1453 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1454 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1455 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
d24d5663 | 1456 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1457 | /* Put all existing messages on error. */ |
1458 | put_messages(msgs, *count); | |
7cdc2bab | 1459 | break; |
14f28187 | 1460 | default: |
498e7994 | 1461 | bt_common_abort(); |
7cdc2bab | 1462 | } |
14f28187 FD |
1463 | |
1464 | no_session: | |
1465 | return status; | |
7cdc2bab | 1466 | } |
41a2b7ae | 1467 | |
7cdc2bab | 1468 | BT_HIDDEN |
21a9f056 | 1469 | bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init( |
14f28187 | 1470 | bt_self_message_iterator *self_msg_it, |
8d8b141d | 1471 | bt_self_message_iterator_configuration *config, |
14f28187 FD |
1472 | bt_self_component_source *self_comp_src, |
1473 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1474 | { |
21a9f056 FD |
1475 | bt_component_class_message_iterator_initialize_method_status ret = |
1476 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK; | |
14f28187 | 1477 | bt_self_component *self_comp = |
d24d5663 | 1478 | bt_self_component_source_as_self_component(self_comp_src); |
14f28187 FD |
1479 | struct lttng_live_component *lttng_live; |
1480 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
c01594de | 1481 | bt_logging_level log_level; |
14f28187 FD |
1482 | |
1483 | BT_ASSERT(self_msg_it); | |
1484 | ||
1485 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1486 | log_level = lttng_live->log_level; |
2ece7dd0 | 1487 | self_comp = lttng_live->self_comp; |
14f28187 FD |
1488 | |
1489 | /* There can be only one downstream iterator at the same time. */ | |
1490 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1491 | lttng_live->has_msg_iter = true; | |
1492 | ||
1493 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1494 | if (!lttng_live_msg_iter) { | |
21a9f056 | 1495 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1496 | goto end; |
7cdc2bab | 1497 | } |
14f28187 | 1498 | |
c01594de | 1499 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
2ece7dd0 | 1500 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
14f28187 FD |
1501 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1502 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1503 | ||
1504 | lttng_live_msg_iter->active_stream_iter = 0; | |
1505 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1506 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1507 | (GDestroyNotify) lttng_live_destroy_session); | |
1508 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1509 | ||
1510 | lttng_live_msg_iter->viewer_connection = | |
1511 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
1419db2b | 1512 | lttng_live_msg_iter, self_comp, NULL, log_level); |
14f28187 FD |
1513 | if (!lttng_live_msg_iter->viewer_connection) { |
1514 | goto error; | |
1515 | } | |
1516 | ||
1517 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1518 | goto error; | |
1519 | } | |
1520 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1521 | switch (lttng_live->params.sess_not_found_act) { | |
1522 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
2ece7dd0 | 1523 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1524 | "session. Keep trying to connect because of " |
1525 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1526 | SESS_NOT_FOUND_ACTION_PARAM, | |
1527 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1528 | lttng_live->params.url->str); | |
1529 | break; | |
1530 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
1419db2b | 1531 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Unable to connect to the requested live viewer " |
14f28187 FD |
1532 | "session. Fail the message iterator" |
1533 | "initialization because of %s=\"%s\" " | |
1534 | "component parameter: url =\"%s\"", | |
1535 | SESS_NOT_FOUND_ACTION_PARAM, | |
1536 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1537 | lttng_live->params.url->str); | |
7cdc2bab | 1538 | goto error; |
14f28187 | 1539 | case SESSION_NOT_FOUND_ACTION_END: |
2ece7dd0 | 1540 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1541 | "session. End gracefully at the first _next() " |
1542 | "call because of %s=\"%s\" component parameter: " | |
1543 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1544 | SESS_NOT_FOUND_ACTION_END_STR, | |
1545 | lttng_live->params.url->str); | |
1546 | break; | |
bce81ff2 | 1547 | default: |
498e7994 | 1548 | bt_common_abort(); |
7cdc2bab | 1549 | } |
7cdc2bab MD |
1550 | } |
1551 | ||
14f28187 FD |
1552 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1553 | ||
1554 | goto end; | |
1555 | error: | |
21a9f056 | 1556 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1557 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1558 | end: |
41a2b7ae | 1559 | return ret; |
7cdc2bab MD |
1560 | } |
1561 | ||
80aff5ef SM |
1562 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1563 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1564 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1565 | }; | |
1566 | ||
7cdc2bab | 1567 | static |
d24d5663 PP |
1568 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1569 | const bt_value *params, const bt_value **result, | |
80aff5ef | 1570 | bt_self_component_class *self_comp_class, |
d24d5663 | 1571 | bt_logging_level log_level) |
7cdc2bab | 1572 | { |
80aff5ef | 1573 | bt_component_class_query_method_status status; |
14f28187 | 1574 | const bt_value *url_value = NULL; |
7cdc2bab | 1575 | const char *url; |
14f28187 | 1576 | struct live_viewer_connection *viewer_connection = NULL; |
80aff5ef SM |
1577 | enum bt_param_validation_status validation_status; |
1578 | gchar *validate_error = NULL; | |
7cdc2bab | 1579 | |
80aff5ef SM |
1580 | validation_status = bt_param_validation_validate(params, |
1581 | list_sessions_params, &validate_error); | |
1582 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1583 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1584 | goto error; |
80aff5ef | 1585 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
a635e507 | 1586 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
1419db2b FD |
1587 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", |
1588 | validate_error); | |
7cdc2bab MD |
1589 | goto error; |
1590 | } | |
1591 | ||
80aff5ef | 1592 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
14f28187 FD |
1593 | url = bt_value_string_get(url_value); |
1594 | ||
550004b4 | 1595 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
1419db2b | 1596 | NULL, self_comp_class, log_level); |
7cdc2bab | 1597 | if (!viewer_connection) { |
1419db2b FD |
1598 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1599 | "Failed to create viewer connection"); | |
80aff5ef | 1600 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1601 | goto error; |
1602 | } | |
1603 | ||
14f28187 | 1604 | status = live_viewer_connection_list_sessions(viewer_connection, |
80aff5ef | 1605 | result); |
d24d5663 | 1606 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
1419db2b FD |
1607 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1608 | "Failed to list viewer sessions"); | |
c7eee084 PP |
1609 | goto error; |
1610 | } | |
1611 | ||
7cdc2bab | 1612 | goto end; |
c7eee084 | 1613 | |
7cdc2bab | 1614 | error: |
14f28187 | 1615 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1616 | |
14f28187 | 1617 | if (status >= 0) { |
d24d5663 | 1618 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1619 | } |
1620 | ||
7cdc2bab MD |
1621 | end: |
1622 | if (viewer_connection) { | |
14f28187 | 1623 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1624 | } |
80aff5ef SM |
1625 | |
1626 | g_free(validate_error); | |
1627 | ||
14f28187 | 1628 | return status; |
7cdc2bab MD |
1629 | } |
1630 | ||
312df793 PP |
1631 | static |
1632 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1633 | const bt_value *params, const bt_value **result, | |
1419db2b | 1634 | bt_self_component_class *self_comp_class, |
312df793 PP |
1635 | bt_logging_level log_level) |
1636 | { | |
1637 | bt_component_class_query_method_status status = | |
1638 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1639 | const bt_value *input_type_value; | |
1640 | const bt_value *input_value; | |
1641 | double weight = 0; | |
1642 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1643 | ||
1644 | /* Used by the logging macros */ | |
1645 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1646 | ||
1647 | *result = NULL; | |
1648 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1649 | "type"); | |
1650 | if (!input_type_value) { | |
1419db2b FD |
1651 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1652 | "Missing expected `type` parameter."); | |
312df793 PP |
1653 | goto error; |
1654 | } | |
1655 | ||
1656 | if (!bt_value_is_string(input_type_value)) { | |
1419db2b FD |
1657 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1658 | "`type` parameter is not a string value."); | |
312df793 PP |
1659 | goto error; |
1660 | } | |
1661 | ||
1662 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1663 | /* We don't handle file system paths */ | |
1664 | goto create_result; | |
1665 | } | |
1666 | ||
1667 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1668 | if (!input_value) { | |
1419db2b FD |
1669 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1670 | "Missing expected `input` parameter."); | |
312df793 PP |
1671 | goto error; |
1672 | } | |
1673 | ||
1674 | if (!bt_value_is_string(input_value)) { | |
1419db2b FD |
1675 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1676 | "`input` parameter is not a string value."); | |
312df793 PP |
1677 | goto error; |
1678 | } | |
1679 | ||
1680 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1681 | NULL, 0); | |
1682 | if (parts.session_name) { | |
1683 | /* | |
1684 | * Looks pretty much like an LTTng live URL: we got the | |
1685 | * session name part, which forms a complete URL. | |
1686 | */ | |
1687 | weight = .75; | |
1688 | } | |
1689 | ||
1690 | create_result: | |
1691 | *result = bt_value_real_create_init(weight); | |
1692 | if (!*result) { | |
1693 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1694 | goto error; | |
1695 | } | |
1696 | ||
1697 | goto end; | |
1698 | ||
1699 | error: | |
1700 | if (status >= 0) { | |
1701 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1702 | } | |
1703 | ||
1704 | BT_ASSERT(!*result); | |
1705 | ||
1706 | end: | |
1707 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1708 | return status; | |
1709 | } | |
1710 | ||
7cdc2bab | 1711 | BT_HIDDEN |
d24d5663 PP |
1712 | bt_component_class_query_method_status lttng_live_query( |
1713 | bt_self_component_class_source *comp_class, | |
3c729b9a | 1714 | bt_private_query_executor *priv_query_exec, |
14f28187 | 1715 | const char *object, const bt_value *params, |
7c14d641 | 1716 | __attribute__((unused)) void *method_data, |
3c729b9a | 1717 | const bt_value **result) |
7cdc2bab | 1718 | { |
d24d5663 PP |
1719 | bt_component_class_query_method_status status = |
1720 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 1721 | bt_self_component *self_comp = NULL; |
80aff5ef SM |
1722 | bt_self_component_class *self_comp_class = |
1723 | bt_self_component_class_source_as_self_component_class(comp_class); | |
3c729b9a PP |
1724 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1725 | bt_private_query_executor_as_query_executor_const( | |
1726 | priv_query_exec)); | |
c7eee084 | 1727 | |
7cdc2bab | 1728 | if (strcmp(object, "sessions") == 0) { |
c01594de | 1729 | status = lttng_live_query_list_sessions(params, result, |
80aff5ef | 1730 | self_comp_class, log_level); |
312df793 PP |
1731 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1732 | status = lttng_live_query_support_info(params, result, | |
1419db2b | 1733 | self_comp_class, log_level); |
14f28187 | 1734 | } else { |
32a09ecd | 1735 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 1736 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 1737 | goto end; |
7cdc2bab | 1738 | } |
14f28187 FD |
1739 | |
1740 | end: | |
1741 | return status; | |
7cdc2bab MD |
1742 | } |
1743 | ||
1744 | static | |
1745 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1746 | { | |
19bdff20 FD |
1747 | if (!lttng_live) { |
1748 | return; | |
1749 | } | |
14f28187 FD |
1750 | if (lttng_live->params.url) { |
1751 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1752 | } |
1753 | g_free(lttng_live); | |
1754 | } | |
1755 | ||
1756 | BT_HIDDEN | |
14f28187 | 1757 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1758 | { |
14f28187 | 1759 | void *data = bt_self_component_get_data( |
0f1979c3 | 1760 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
1761 | |
1762 | if (!data) { | |
1763 | return; | |
1764 | } | |
1765 | lttng_live_component_destroy_data(data); | |
1766 | } | |
1767 | ||
1768 | static | |
14f28187 FD |
1769 | enum session_not_found_action parse_session_not_found_action_param( |
1770 | const bt_value *no_session_param) | |
1771 | { | |
1772 | enum session_not_found_action action; | |
80aff5ef SM |
1773 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
1774 | ||
14f28187 FD |
1775 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
1776 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1777 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1778 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
14f28187 | 1779 | } else { |
80aff5ef SM |
1780 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
1781 | action = SESSION_NOT_FOUND_ACTION_END; | |
14f28187 FD |
1782 | } |
1783 | ||
1784 | return action; | |
1785 | } | |
1786 | ||
80aff5ef SM |
1787 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
1788 | .type = BT_VALUE_TYPE_STRING, | |
1789 | }; | |
1790 | ||
1791 | static const char *sess_not_found_action_choices[] = { | |
1792 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1793 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1794 | SESS_NOT_FOUND_ACTION_END_STR, | |
1795 | }; | |
1796 | ||
1797 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
1798 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
1799 | .min_length = 1, | |
1800 | .max_length = 1, | |
1801 | .element_type = &inputs_elem_descr, | |
1802 | } } }, | |
1803 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
1804 | .choices = sess_not_found_action_choices, | |
1805 | } } }, | |
1806 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1807 | }; | |
1808 | ||
70384700 | 1809 | static |
80aff5ef SM |
1810 | bt_component_class_initialize_method_status lttng_live_component_create( |
1811 | const bt_value *params, | |
1812 | bt_logging_level log_level, | |
1813 | bt_self_component *self_comp, | |
1814 | struct lttng_live_component **component) | |
7cdc2bab | 1815 | { |
80aff5ef | 1816 | struct lttng_live_component *lttng_live = NULL; |
312df793 PP |
1817 | const bt_value *inputs_value; |
1818 | const bt_value *url_value; | |
1819 | const bt_value *value; | |
7cdc2bab | 1820 | const char *url; |
80aff5ef SM |
1821 | enum bt_param_validation_status validation_status; |
1822 | gchar *validation_error = NULL; | |
1823 | bt_component_class_initialize_method_status status; | |
1824 | ||
1825 | validation_status = bt_param_validation_validate(params, params_descr, | |
1826 | &validation_error); | |
1827 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1828 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
1829 | goto error; | |
1830 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
1831 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
1832 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
1833 | goto error; | |
1834 | } | |
7cdc2bab MD |
1835 | |
1836 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1837 | if (!lttng_live) { | |
80aff5ef | 1838 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1839 | goto end; |
1840 | } | |
c01594de | 1841 | lttng_live->log_level = log_level; |
2ece7dd0 | 1842 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1843 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
1844 | lttng_live->has_msg_iter = false; |
1845 | ||
80aff5ef SM |
1846 | inputs_value = |
1847 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
1848 | url_value = | |
1849 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
312df793 | 1850 | url = bt_value_string_get(url_value); |
80aff5ef | 1851 | |
14f28187 FD |
1852 | lttng_live->params.url = g_string_new(url); |
1853 | if (!lttng_live->params.url) { | |
80aff5ef | 1854 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1855 | goto error; |
1856 | } | |
14f28187 FD |
1857 | |
1858 | value = bt_value_map_borrow_entry_value_const(params, | |
1859 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 | 1860 | if (value) { |
14f28187 FD |
1861 | lttng_live->params.sess_not_found_act = |
1862 | parse_session_not_found_action_param(value); | |
14f28187 | 1863 | } else { |
312df793 PP |
1864 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1865 | "defaulting to `%s`.", | |
14f28187 FD |
1866 | SESS_NOT_FOUND_ACTION_PARAM, |
1867 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1868 | lttng_live->params.sess_not_found_act = | |
1869 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1870 | } |
4c66436f | 1871 | |
80aff5ef | 1872 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
1873 | goto end; |
1874 | ||
1875 | error: | |
1876 | lttng_live_component_destroy_data(lttng_live); | |
1877 | lttng_live = NULL; | |
1878 | end: | |
80aff5ef SM |
1879 | g_free(validation_error); |
1880 | ||
1881 | *component = lttng_live; | |
1882 | return status; | |
d3e4dcd8 PP |
1883 | } |
1884 | ||
f3bc2010 | 1885 | BT_HIDDEN |
21a9f056 | 1886 | bt_component_class_initialize_method_status lttng_live_component_init( |
c01594de | 1887 | bt_self_component_source *self_comp_src, |
59225a3e SM |
1888 | bt_self_component_source_configuration *config, |
1889 | const bt_value *params, | |
1890 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1891 | { |
7cdc2bab | 1892 | struct lttng_live_component *lttng_live; |
80aff5ef | 1893 | bt_component_class_initialize_method_status ret; |
c01594de PP |
1894 | bt_self_component *self_comp = |
1895 | bt_self_component_source_as_self_component(self_comp_src); | |
1896 | bt_logging_level log_level = bt_component_get_logging_level( | |
1897 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 1898 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1899 | |
80aff5ef SM |
1900 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
1901 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
19bdff20 | 1902 | goto error; |
7cdc2bab MD |
1903 | } |
1904 | ||
d24d5663 PP |
1905 | add_port_status = bt_self_component_source_add_output_port( |
1906 | self_comp_src, "out", NULL, NULL); | |
80aff5ef SM |
1907 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
1908 | ret = (int) add_port_status; | |
1909 | goto end; | |
147337a3 | 1910 | } |
7cdc2bab | 1911 | |
c01594de | 1912 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 1913 | goto end; |
7cdc2bab | 1914 | |
19bdff20 FD |
1915 | error: |
1916 | lttng_live_component_destroy_data(lttng_live); | |
1917 | lttng_live = NULL; | |
7cdc2bab MD |
1918 | end: |
1919 | return ret; | |
d85ef162 | 1920 | } |