Commit | Line | Data |
---|---|---|
f3bc2010 JG |
1 | /* |
2 | * lttng-live.c | |
3 | * | |
4 | * Babeltrace CTF LTTng-live Client Component | |
5 | * | |
14f28187 | 6 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
f3bc2010 | 7 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
7cdc2bab | 8 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 JG |
9 | * |
10 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
11 | * | |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
25 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
28 | * SOFTWARE. | |
29 | */ | |
30 | ||
2ece7dd0 | 31 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 32 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 33 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE" |
d9c39b0a | 34 | #include "logging/comp-logging.h" |
020bc26f | 35 | |
14f28187 FD |
36 | #include <glib.h> |
37 | #include <inttypes.h> | |
c4f23e30 | 38 | #include <stdbool.h> |
14f28187 FD |
39 | #include <unistd.h> |
40 | ||
578e048b | 41 | #include "common/assert.h" |
3fadfbc0 | 42 | #include <babeltrace2/babeltrace.h> |
578e048b | 43 | #include "compat/compiler.h" |
3fadfbc0 | 44 | #include <babeltrace2/types.h> |
f3bc2010 | 45 | |
376fc2bd | 46 | #include "plugins/common/muxing/muxing.h" |
80aff5ef | 47 | #include "plugins/common/param-validation/param-validation.h" |
376fc2bd | 48 | |
7cdc2bab MD |
49 | #include "data-stream.h" |
50 | #include "metadata.h" | |
14f28187 | 51 | #include "lttng-live.h" |
7cdc2bab | 52 | |
14f28187 FD |
53 | #define MAX_QUERY_SIZE (256*1024) |
54 | #define URL_PARAM "url" | |
312df793 | 55 | #define INPUTS_PARAM "inputs" |
14f28187 FD |
56 | #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action" |
57 | #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue" | |
58 | #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail" | |
59 | #define SESS_NOT_FOUND_ACTION_END_STR "end" | |
7cdc2bab | 60 | |
2ece7dd0 | 61 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 62 | |
14f28187 FD |
63 | static |
64 | const char *print_live_iterator_status(enum lttng_live_iterator_status status) | |
65 | { | |
66 | switch (status) { | |
67 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
68 | return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE"; | |
69 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
70 | return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN"; | |
71 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
72 | return "LTTNG_LIVE_ITERATOR_STATUS_END"; | |
73 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
74 | return "LTTNG_LIVE_ITERATOR_STATUS_OK"; | |
75 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
76 | return "LTTNG_LIVE_ITERATOR_STATUS_INVAL"; | |
77 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
78 | return "LTTNG_LIVE_ITERATOR_STATUS_ERROR"; | |
79 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
80 | return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM"; | |
81 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
82 | return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED"; | |
83 | default: | |
84 | abort(); | |
85 | } | |
86 | } | |
87 | ||
88 | static | |
89 | const char *print_state(struct lttng_live_stream_iterator *s) | |
7cdc2bab MD |
90 | { |
91 | switch (s->state) { | |
92 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
93 | return "ACTIVE_NO_DATA"; | |
94 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
95 | return "QUIESCENT_NO_DATA"; | |
96 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
97 | return "QUIESCENT"; | |
98 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
99 | return "ACTIVE_DATA"; | |
100 | case LTTNG_LIVE_STREAM_EOF: | |
101 | return "EOF"; | |
102 | default: | |
103 | return "ERROR"; | |
104 | } | |
105 | } | |
7cdc2bab | 106 | |
14f28187 FD |
107 | #define print_stream_state(live_stream_iter) \ |
108 | do { \ | |
2ece7dd0 | 109 | BT_COMP_LOGD("stream state %s last_inact_ts %" PRId64 \ |
14f28187 FD |
110 | ", curr_inact_ts %" PRId64, \ |
111 | print_state(live_stream_iter), \ | |
112 | live_stream_iter->last_inactivity_ts, \ | |
113 | live_stream_iter->current_inactivity_ts); \ | |
114 | } while (0); | |
6f79a7cf MD |
115 | |
116 | BT_HIDDEN | |
9b4f9b42 | 117 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 118 | { |
14f28187 | 119 | bool ret; |
6f79a7cf | 120 | |
9b4f9b42 | 121 | if (!msg_iter) { |
14f28187 FD |
122 | ret = false; |
123 | goto end; | |
7cdc2bab | 124 | } |
7cdc2bab | 125 | |
9b4f9b42 PP |
126 | ret = bt_self_message_iterator_is_interrupted( |
127 | msg_iter->self_msg_iter); | |
4bf0e537 | 128 | |
14f28187 FD |
129 | end: |
130 | return ret; | |
7cdc2bab MD |
131 | } |
132 | ||
133 | static | |
134 | struct lttng_live_trace *lttng_live_find_trace(struct lttng_live_session *session, | |
135 | uint64_t trace_id) | |
d3e4dcd8 | 136 | { |
14f28187 FD |
137 | uint64_t trace_idx; |
138 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 139 | |
14f28187 FD |
140 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
141 | struct lttng_live_trace *trace = | |
142 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 143 | if (trace->id == trace_id) { |
14f28187 FD |
144 | ret_trace = trace; |
145 | goto end; | |
7cdc2bab MD |
146 | } |
147 | } | |
14f28187 FD |
148 | |
149 | end: | |
150 | return ret_trace; | |
d3eb6e8f PP |
151 | } |
152 | ||
7cdc2bab | 153 | static |
14f28187 | 154 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 155 | { |
c01594de | 156 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 157 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 158 | |
2ece7dd0 | 159 | BT_COMP_LOGD("Destroy lttng_live_trace"); |
7cdc2bab | 160 | |
14f28187 FD |
161 | BT_ASSERT(trace->stream_iterators); |
162 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 163 | |
14f28187 FD |
164 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
165 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 166 | |
7cdc2bab | 167 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
168 | g_free(trace); |
169 | } | |
170 | ||
171 | static | |
172 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
173 | uint64_t trace_id) | |
174 | { | |
175 | struct lttng_live_trace *trace = NULL; | |
c01594de | 176 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 177 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab MD |
178 | |
179 | trace = g_new0(struct lttng_live_trace, 1); | |
180 | if (!trace) { | |
1419db2b FD |
181 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
182 | "Failed to allocate live trace"); | |
7cdc2bab MD |
183 | goto error; |
184 | } | |
c01594de | 185 | trace->log_level = session->log_level; |
2ece7dd0 | 186 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
187 | trace->session = session; |
188 | trace->id = trace_id; | |
14f28187 FD |
189 | trace->trace_class = NULL; |
190 | trace->trace = NULL; | |
191 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0f1979c3 | 192 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
14f28187 | 193 | BT_ASSERT(trace->stream_iterators); |
7cdc2bab | 194 | trace->new_metadata_needed = true; |
14f28187 FD |
195 | g_ptr_array_add(session->traces, trace); |
196 | ||
2ece7dd0 | 197 | BT_COMP_LOGI("Create trace"); |
7cdc2bab MD |
198 | goto end; |
199 | error: | |
200 | g_free(trace); | |
201 | trace = NULL; | |
202 | end: | |
203 | return trace; | |
204 | } | |
205 | ||
206 | BT_HIDDEN | |
14f28187 FD |
207 | struct lttng_live_trace *lttng_live_borrow_trace( |
208 | struct lttng_live_session *session, uint64_t trace_id) | |
7cdc2bab MD |
209 | { |
210 | struct lttng_live_trace *trace; | |
211 | ||
212 | trace = lttng_live_find_trace(session, trace_id); | |
213 | if (trace) { | |
14f28187 | 214 | goto end; |
7cdc2bab | 215 | } |
7cdc2bab | 216 | |
14f28187 FD |
217 | /* The session is the owner of the newly created trace. */ |
218 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 219 | |
14f28187 FD |
220 | end: |
221 | return trace; | |
7cdc2bab MD |
222 | } |
223 | ||
224 | BT_HIDDEN | |
14f28187 | 225 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
226 | uint64_t session_id, const char *hostname, |
227 | const char *session_name) | |
7cdc2bab MD |
228 | { |
229 | int ret = 0; | |
14f28187 | 230 | struct lttng_live_session *session; |
c01594de | 231 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 232 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 233 | |
14f28187 FD |
234 | session = g_new0(struct lttng_live_session, 1); |
235 | if (!session) { | |
1419db2b FD |
236 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
237 | "Failed to allocate live session"); | |
7cdc2bab MD |
238 | goto error; |
239 | } | |
240 | ||
c01594de | 241 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 242 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
243 | session->id = session_id; |
244 | session->traces = g_ptr_array_new_with_free_func( | |
0f1979c3 | 245 | (GDestroyNotify) lttng_live_destroy_trace); |
14f28187 FD |
246 | BT_ASSERT(session->traces); |
247 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
248 | session->new_streams_needed = true; | |
249 | session->hostname = g_string_new(hostname); | |
250 | BT_ASSERT(session->hostname); | |
251 | ||
252 | session->session_name = g_string_new(session_name); | |
253 | BT_ASSERT(session->session_name); | |
7cdc2bab | 254 | |
2ece7dd0 | 255 | BT_COMP_LOGI("Reading from session: %" PRIu64 " hostname: %s session_name: %s", |
14f28187 FD |
256 | session->id, hostname, session_name); |
257 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); | |
7cdc2bab MD |
258 | goto end; |
259 | error: | |
1419db2b | 260 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Error adding session"); |
14f28187 | 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 | { | |
c01594de | 270 | bt_logging_level log_level; |
2ece7dd0 | 271 | bt_self_component *self_comp; |
14f28187 FD |
272 | |
273 | if (!session) { | |
274 | goto end; | |
275 | } | |
7cdc2bab | 276 | |
c01594de | 277 | log_level = session->log_level; |
2ece7dd0 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)) { | |
0757916e FD |
282 | if (!lttng_live_graph_is_canceled( |
283 | session->lttng_live_msg_iter)) { | |
4c66436f | 284 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 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 | } | |
14f28187 FD |
291 | |
292 | if (session->traces) { | |
293 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 294 | } |
14f28187 | 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); |
14f28187 FD |
303 | |
304 | end: | |
305 | return; | |
7cdc2bab MD |
306 | } |
307 | ||
14f28187 FD |
308 | static |
309 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 310 | { |
14f28187 FD |
311 | if (!lttng_live_msg_iter) { |
312 | goto end; | |
7cdc2bab | 313 | } |
7cdc2bab | 314 | |
14f28187 FD |
315 | if (lttng_live_msg_iter->sessions) { |
316 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 317 | } |
14f28187 | 318 | |
b9e6ec43 FD |
319 | if (lttng_live_msg_iter->viewer_connection) { |
320 | live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection); | |
321 | } | |
14f28187 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 | |
14f28187 | 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 | { | |
c01594de | 351 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 352 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 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. */ | |
2ece7dd0 | 360 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
087bc060 | 361 | abort(); |
7cdc2bab MD |
362 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
363 | /* Invalid state. */ | |
2ece7dd0 | 364 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
087bc060 | 365 | abort(); |
7cdc2bab MD |
366 | case LTTNG_LIVE_STREAM_EOF: |
367 | break; | |
368 | } | |
14f28187 | 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 | |
14f28187 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 | { | |
c01594de | 385 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 386 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 | 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; |
0f1979c3 | 389 | struct packet_index index; |
7cdc2bab MD |
390 | |
391 | if (lttng_live_stream->trace->new_metadata_needed) { | |
14f28187 | 392 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
393 | goto end; |
394 | } | |
395 | if (lttng_live_stream->trace->session->new_streams_needed) { | |
14f28187 | 396 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
397 | goto end; |
398 | } | |
14f28187 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 | } | |
14f28187 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 | } | |
98b15851 | 408 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
7cdc2bab | 409 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 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 { | |
14f28187 | 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: | |
14f28187 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 | /* | |
14f28187 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 | |
14f28187 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 | { | |
1419db2b 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; | |
14f28187 FD |
446 | enum lttng_live_iterator_status status; |
447 | uint64_t trace_idx; | |
7cdc2bab | 448 | |
14f28187 | 449 | if (!session->attached) { |
eee8e741 FD |
450 | enum lttng_live_attach_session_status attach_status = |
451 | lttng_live_attach_session(session); | |
452 | if (attach_status != LTTNG_LIVE_ATTACH_SESSION_STATUS_OK) { | |
0757916e | 453 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
1419db2b FD |
454 | /* |
455 | * Clear any causes appended in | |
456 | * `lttng_live_attach_session()` as we want to | |
457 | * return gracefully since the graph was | |
458 | * cancelled. | |
459 | */ | |
460 | bt_current_thread_clear_error(); | |
14f28187 FD |
461 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
462 | } else { | |
463 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1419db2b FD |
464 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
465 | "Error attaching to LTTng live session"); | |
14f28187 FD |
466 | } |
467 | goto end; | |
4c66436f | 468 | } |
7cdc2bab | 469 | } |
14f28187 | 470 | |
7cdc2bab | 471 | status = lttng_live_get_new_streams(session); |
14f28187 FD |
472 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
473 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
474 | goto end; | |
7cdc2bab | 475 | } |
c28512ab FD |
476 | trace_idx = 0; |
477 | while (trace_idx < session->traces->len) { | |
14f28187 FD |
478 | struct lttng_live_trace *trace = |
479 | g_ptr_array_index(session->traces, trace_idx); | |
480 | ||
7cdc2bab | 481 | status = lttng_live_metadata_update(trace); |
c28512ab FD |
482 | switch (status) { |
483 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
484 | trace_idx++; | |
485 | break; | |
486 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
487 | /* | |
488 | * The trace has ended. Remove it of the array an | |
489 | * continue the iteration. | |
490 | * We can remove the trace safely when using the | |
491 | * g_ptr_array_remove_index_fast because it replaces | |
492 | * the element at trace_idx with the array's last | |
493 | * element. trace_idx is not incremented because of | |
494 | * that. | |
495 | */ | |
496 | (void) g_ptr_array_remove_index_fast(session->traces, | |
497 | trace_idx); | |
498 | break; | |
499 | default: | |
14f28187 | 500 | goto end; |
7cdc2bab MD |
501 | } |
502 | } | |
14f28187 FD |
503 | status = lttng_live_lazy_msg_init(session); |
504 | ||
505 | end: | |
506 | return status; | |
7cdc2bab MD |
507 | } |
508 | ||
509 | BT_HIDDEN | |
14f28187 | 510 | void lttng_live_need_new_streams(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 511 | { |
14f28187 | 512 | uint64_t session_idx; |
7cdc2bab | 513 | |
14f28187 FD |
514 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
515 | session_idx++) { | |
516 | struct lttng_live_session *session = | |
517 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
518 | session->new_streams_needed = true; |
519 | } | |
520 | } | |
521 | ||
522 | static | |
14f28187 | 523 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 524 | { |
14f28187 | 525 | uint64_t session_idx, trace_idx; |
7cdc2bab | 526 | |
14f28187 FD |
527 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
528 | session_idx++) { | |
529 | struct lttng_live_session *session = | |
530 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab | 531 | session->new_streams_needed = true; |
14f28187 FD |
532 | for (trace_idx = 0; trace_idx < session->traces->len; |
533 | trace_idx++) { | |
534 | struct lttng_live_trace *trace = | |
535 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab MD |
536 | trace->new_metadata_needed = true; |
537 | } | |
538 | } | |
539 | } | |
540 | ||
541 | static | |
14f28187 FD |
542 | enum lttng_live_iterator_status |
543 | lttng_live_iterator_handle_new_streams_and_metadata( | |
544 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 545 | { |
0f1979c3 | 546 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1419db2b FD |
547 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
548 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
549 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
550 | struct lttng_live_session *session; | |
551 | enum session_not_found_action sess_not_found_act = | |
552 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
553 | ||
7cdc2bab | 554 | /* |
14f28187 | 555 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
556 | * session" flag to the protocol, which would tell us that we |
557 | * need to query for new sessions even though we have sessions | |
558 | * currently ongoing. | |
559 | */ | |
14f28187 FD |
560 | if (lttng_live_msg_iter->sessions->len == 0) { |
561 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
562 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
563 | goto end; | |
564 | } else { | |
565 | /* | |
566 | * Retry to create a viewer session for the requested | |
567 | * session name. | |
568 | */ | |
569 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
570 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1419db2b FD |
571 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
572 | "Error creating LTTng live viewer session"); | |
14f28187 FD |
573 | goto end; |
574 | } | |
575 | } | |
7cdc2bab | 576 | } |
14f28187 FD |
577 | |
578 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
579 | session_idx++) { | |
580 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
581 | session_idx); | |
582 | ret = lttng_live_get_session(lttng_live_msg_iter, session); | |
7cdc2bab | 583 | switch (ret) { |
14f28187 | 584 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 585 | break; |
14f28187 FD |
586 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
587 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
588 | break; |
589 | default: | |
590 | goto end; | |
591 | } | |
592 | if (!session->closed) { | |
593 | nr_sessions_opened++; | |
594 | } | |
595 | } | |
596 | end: | |
14f28187 FD |
597 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK && |
598 | sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
599 | nr_sessions_opened == 0) { | |
600 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
601 | } |
602 | return ret; | |
603 | } | |
604 | ||
605 | static | |
14f28187 FD |
606 | enum lttng_live_iterator_status emit_inactivity_message( |
607 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
608 | struct lttng_live_stream_iterator *stream_iter, | |
609 | bt_message **message, uint64_t timestamp) | |
7cdc2bab | 610 | { |
0f1979c3 | 611 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1419db2b FD |
612 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
613 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 614 | bt_message *msg = NULL; |
7cdc2bab | 615 | |
14f28187 FD |
616 | BT_ASSERT(stream_iter->trace->clock_class); |
617 | ||
618 | msg = bt_message_message_iterator_inactivity_create( | |
0f1979c3 FD |
619 | lttng_live_msg_iter->self_msg_iter, |
620 | stream_iter->trace->clock_class, timestamp); | |
d6e69534 | 621 | if (!msg) { |
1419db2b FD |
622 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
623 | "Error emitting message iterator inactivity message"); | |
7cdc2bab MD |
624 | goto error; |
625 | } | |
14f28187 | 626 | |
d6e69534 | 627 | *message = msg; |
7cdc2bab | 628 | end: |
7cdc2bab MD |
629 | return ret; |
630 | ||
631 | error: | |
14f28187 | 632 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 633 | bt_message_put_ref(msg); |
7cdc2bab MD |
634 | goto end; |
635 | } | |
636 | ||
637 | static | |
14f28187 FD |
638 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
639 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 640 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 641 | bt_message **message) |
7cdc2bab | 642 | { |
0f1979c3 | 643 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
644 | |
645 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 646 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
647 | } |
648 | ||
14f28187 FD |
649 | if (lttng_live_stream->current_inactivity_ts == |
650 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 651 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
14f28187 FD |
652 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
653 | goto end; | |
654 | } | |
655 | ||
656 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0f1979c3 | 657 | message, lttng_live_stream->current_inactivity_ts); |
14f28187 FD |
658 | |
659 | lttng_live_stream->last_inactivity_ts = | |
0f1979c3 | 660 | lttng_live_stream->current_inactivity_ts; |
14f28187 FD |
661 | end: |
662 | return ret; | |
663 | } | |
664 | ||
665 | static | |
666 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
667 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
668 | const bt_message *msg, int64_t last_msg_ts_ns, | |
669 | int64_t *ts_ns) | |
670 | { | |
671 | const bt_clock_class *clock_class = NULL; | |
672 | const bt_clock_snapshot *clock_snapshot = NULL; | |
673 | int ret = 0; | |
c01594de | 674 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 675 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 676 | |
98b15851 PP |
677 | BT_ASSERT_DBG(msg); |
678 | BT_ASSERT_DBG(ts_ns); | |
14f28187 | 679 | |
2ece7dd0 | 680 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
681 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
682 | last_msg_ts_ns); | |
683 | ||
684 | switch (bt_message_get_type(msg)) { | |
685 | case BT_MESSAGE_TYPE_EVENT: | |
0f1979c3 | 686 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
14f28187 | 687 | msg); |
98b15851 | 688 | BT_ASSERT_DBG(clock_class); |
14f28187 | 689 | |
0cbc2c33 PP |
690 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
691 | msg); | |
14f28187 FD |
692 | break; |
693 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0f1979c3 | 694 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
695 | msg); |
696 | BT_ASSERT(clock_class); | |
697 | ||
0cbc2c33 PP |
698 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
699 | msg); | |
14f28187 FD |
700 | break; |
701 | case BT_MESSAGE_TYPE_PACKET_END: | |
0f1979c3 | 702 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
703 | msg); |
704 | BT_ASSERT(clock_class); | |
705 | ||
0cbc2c33 PP |
706 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
707 | msg); | |
14f28187 FD |
708 | break; |
709 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0f1979c3 | 710 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
711 | msg); |
712 | BT_ASSERT(clock_class); | |
713 | ||
9b24b6aa | 714 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 715 | msg); |
14f28187 FD |
716 | break; |
717 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0f1979c3 | 718 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
719 | msg); |
720 | BT_ASSERT(clock_class); | |
721 | ||
9b24b6aa | 722 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 723 | msg); |
14f28187 | 724 | break; |
14f28187 | 725 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
0f1979c3 FD |
726 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_default_clock_snapshot_const( |
727 | msg); | |
14f28187 FD |
728 | break; |
729 | default: | |
730 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 731 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 732 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
733 | goto end; |
734 | } | |
735 | ||
14f28187 | 736 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
98b15851 | 737 | BT_ASSERT_DBG(clock_class); |
14f28187 FD |
738 | |
739 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
740 | if (ret) { | |
1419db2b FD |
741 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
742 | "Cannot get nanoseconds from Epoch of clock snapshot: " | |
14f28187 FD |
743 | "clock-snapshot-addr=%p", clock_snapshot); |
744 | goto error; | |
745 | } | |
746 | ||
747 | goto end; | |
748 | ||
14f28187 FD |
749 | error: |
750 | ret = -1; | |
7cdc2bab | 751 | |
7cdc2bab | 752 | end: |
14f28187 | 753 | if (ret == 0) { |
2ece7dd0 | 754 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
755 | "iter-data-addr=%p, msg-addr=%p, " |
756 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
757 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
758 | } | |
759 | ||
7cdc2bab MD |
760 | return ret; |
761 | } | |
762 | ||
763 | static | |
14f28187 FD |
764 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
765 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 766 | struct lttng_live_stream_iterator *lttng_live_stream, |
14f28187 | 767 | bt_message **message) |
7cdc2bab | 768 | { |
14f28187 | 769 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
c01594de | 770 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 771 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 FD |
772 | enum bt_msg_iter_status status; |
773 | uint64_t session_idx, trace_idx; | |
7cdc2bab | 774 | |
14f28187 FD |
775 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
776 | session_idx++) { | |
777 | struct lttng_live_session *session = | |
778 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
779 | |
780 | if (session->new_streams_needed) { | |
14f28187 FD |
781 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
782 | goto end; | |
7cdc2bab | 783 | } |
14f28187 FD |
784 | for (trace_idx = 0; trace_idx < session->traces->len; |
785 | trace_idx++) { | |
786 | struct lttng_live_trace *trace = | |
787 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 788 | if (trace->new_metadata_needed) { |
14f28187 FD |
789 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
790 | goto end; | |
7cdc2bab MD |
791 | } |
792 | } | |
793 | } | |
794 | ||
795 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 FD |
796 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
797 | goto end; | |
7cdc2bab | 798 | } |
14f28187 FD |
799 | |
800 | status = bt_msg_iter_get_next_message(lttng_live_stream->msg_iter, | |
801 | lttng_live_msg_iter->self_msg_iter, message); | |
7cdc2bab | 802 | switch (status) { |
d6e69534 | 803 | case BT_MSG_ITER_STATUS_EOF: |
14f28187 | 804 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 805 | break; |
d6e69534 | 806 | case BT_MSG_ITER_STATUS_OK: |
14f28187 | 807 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 808 | break; |
d6e69534 | 809 | case BT_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
810 | /* |
811 | * Continue immediately (end of packet). The next | |
812 | * get_index may return AGAIN to delay the following | |
813 | * attempt. | |
814 | */ | |
14f28187 | 815 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 816 | break; |
d6e69534 | 817 | case BT_MSG_ITER_STATUS_INVAL: |
7cdc2bab | 818 | /* No argument provided by the user, so don't return INVAL. */ |
d6e69534 | 819 | case BT_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 820 | default: |
14f28187 | 821 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1419db2b FD |
822 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
823 | "CTF message iterator return an error or failed: " | |
824 | "msg_iter=%p", lttng_live_stream->msg_iter); | |
7cdc2bab MD |
825 | break; |
826 | } | |
14f28187 FD |
827 | |
828 | end: | |
7cdc2bab MD |
829 | return ret; |
830 | } | |
831 | ||
4a39caef FD |
832 | static |
833 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
834 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
835 | struct lttng_live_stream_iterator *stream_iter, | |
836 | bt_message **curr_msg) | |
837 | { | |
838 | enum lttng_live_iterator_status live_status = | |
839 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1419db2b FD |
840 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
841 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
4a39caef FD |
842 | /* |
843 | * The viewer has hung up on us so we are closing the stream. The | |
844 | * `bt_msg_iter` should simply realize that it needs to close the | |
845 | * stream properly by emitting the necessary stream end message. | |
846 | */ | |
0f1979c3 FD |
847 | enum bt_msg_iter_status status = bt_msg_iter_get_next_message( |
848 | stream_iter->msg_iter, lttng_live_msg_iter->self_msg_iter, | |
849 | curr_msg); | |
4a39caef FD |
850 | |
851 | if (status == BT_MSG_ITER_STATUS_ERROR) { | |
1419db2b FD |
852 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
853 | "Error getting the next message from CTF message iterator"); | |
4a39caef FD |
854 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
855 | goto end; | |
856 | } | |
857 | ||
858 | BT_ASSERT(status == BT_MSG_ITER_STATUS_OK); | |
859 | ||
860 | end: | |
861 | return live_status; | |
862 | } | |
863 | ||
7cdc2bab MD |
864 | /* |
865 | * helper function: | |
866 | * handle_no_data_streams() | |
867 | * retry: | |
868 | * - for each ACTIVE_NO_DATA stream: | |
869 | * - query relayd for stream data, or quiescence info. | |
870 | * - if need metadata, get metadata, goto retry. | |
871 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
872 | * - if quiescent, move to QUIESCENT streams | |
873 | * - if fetched data, move to ACTIVE_DATA streams | |
874 | * (at this point each stream either has data, or is quiescent) | |
875 | * | |
876 | * | |
877 | * iterator_next: | |
878 | * handle_new_streams_and_metadata() | |
879 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
880 | * - query relayd for metadata | |
881 | * | |
882 | * call handle_active_no_data_streams() | |
883 | * | |
884 | * handle_quiescent_streams() | |
885 | * - if at least one stream is ACTIVE_DATA: | |
886 | * - peek stream event with lowest timestamp -> next_ts | |
887 | * - for each quiescent stream | |
888 | * - if next_ts >= quiescent end | |
889 | * - set state to ACTIVE_NO_DATA | |
890 | * - else | |
891 | * - for each quiescent stream | |
892 | * - set state to ACTIVE_NO_DATA | |
893 | * | |
894 | * call handle_active_no_data_streams() | |
895 | * | |
896 | * handle_active_data_streams() | |
897 | * - if at least one stream is ACTIVE_DATA: | |
898 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 899 | * - make that stream event the current message. |
7cdc2bab MD |
900 | * - move this stream heap position to its next event |
901 | * - if we need to fetch data from relayd, move | |
902 | * stream to ACTIVE_NO_DATA. | |
903 | * - return OK | |
904 | * - return AGAIN | |
905 | * | |
906 | * end criterion: ctrl-c on client. If relayd exits or the session | |
907 | * closes on the relay daemon side, we keep on waiting for streams. | |
908 | * Eventually handle --end timestamp (also an end criterion). | |
909 | * | |
910 | * When disconnected from relayd: try to re-connect endlessly. | |
911 | */ | |
912 | static | |
a31f4d8b | 913 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
914 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
915 | struct lttng_live_stream_iterator *stream_iter, | |
916 | bt_message **curr_msg) | |
7cdc2bab | 917 | { |
c01594de | 918 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 919 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 920 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 921 | |
4a39caef FD |
922 | if (stream_iter->has_stream_hung_up) { |
923 | /* | |
924 | * The stream has hung up and the stream was properly closed | |
925 | * during the last call to the current function. Return _END | |
926 | * status now so that this stream iterator is removed for the | |
927 | * stream iterator list. | |
928 | */ | |
929 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
930 | goto end; | |
931 | } | |
932 | ||
7cdc2bab MD |
933 | retry: |
934 | print_stream_state(stream_iter); | |
14f28187 | 935 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0f1979c3 | 936 | lttng_live_msg_iter); |
14f28187 | 937 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
938 | goto end; |
939 | } | |
14f28187 | 940 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0f1979c3 | 941 | lttng_live_msg_iter, stream_iter); |
4a39caef | 942 | |
14f28187 | 943 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
944 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
945 | /* | |
946 | * We overwrite `live_status` since `curr_msg` is | |
947 | * likely set to a valid message in this function. | |
948 | */ | |
949 | live_status = lttng_live_iterator_close_stream( | |
950 | lttng_live_msg_iter, stream_iter, curr_msg); | |
951 | } | |
7cdc2bab MD |
952 | goto end; |
953 | } | |
14f28187 | 954 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0f1979c3 | 955 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 956 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 957 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
958 | goto end; |
959 | } | |
14f28187 | 960 | if (*curr_msg) { |
7cdc2bab MD |
961 | goto end; |
962 | } | |
14f28187 | 963 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0f1979c3 | 964 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 965 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 966 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
967 | } |
968 | ||
969 | end: | |
14f28187 | 970 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
7cdc2bab | 971 | goto retry; |
7cdc2bab | 972 | } |
14f28187 FD |
973 | |
974 | return live_status; | |
7cdc2bab MD |
975 | } |
976 | ||
977 | static | |
14f28187 FD |
978 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
979 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
980 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 981 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 982 | { |
a31f4d8b | 983 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0f1979c3 FD |
984 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
985 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 986 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 987 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 988 | uint64_t stream_iter_idx; |
7cdc2bab | 989 | |
98b15851 PP |
990 | BT_ASSERT_DBG(live_trace); |
991 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
14f28187 FD |
992 | /* |
993 | * Update the current message of every stream iterators of this trace. | |
994 | * The current msg of every stream must have a timestamp equal or | |
995 | * larger than the last message returned by this iterator. We must | |
996 | * ensure monotonicity. | |
997 | */ | |
998 | stream_iter_idx = 0; | |
999 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
1000 | bool stream_iter_is_ended = false; | |
1001 | struct lttng_live_stream_iterator *stream_iter = | |
1002 | g_ptr_array_index(live_trace->stream_iterators, | |
0f1979c3 | 1003 | stream_iter_idx); |
14f28187 FD |
1004 | |
1005 | /* | |
1006 | * Find if there is are now current message for this stream | |
1007 | * iterator get it. | |
1008 | */ | |
1009 | while (!stream_iter->current_msg) { | |
1010 | bt_message *msg = NULL; | |
1011 | int64_t curr_msg_ts_ns = INT64_MAX; | |
a31f4d8b | 1012 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0f1979c3 | 1013 | lttng_live_msg_iter, stream_iter, &msg); |
14f28187 | 1014 | |
2ece7dd0 | 1015 | BT_COMP_LOGD("live stream iterator returned status :%s", |
0f1979c3 | 1016 | print_live_iterator_status(stream_iter_status)); |
14f28187 FD |
1017 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1018 | stream_iter_is_ended = true; | |
1019 | break; | |
1020 | } | |
1021 | ||
1022 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1023 | goto end; | |
1024 | } | |
1025 | ||
98b15851 | 1026 | BT_ASSERT_DBG(msg); |
14f28187 FD |
1027 | |
1028 | /* | |
1029 | * Get the timestamp in nanoseconds from origin of this | |
1030 | * messsage. | |
1031 | */ | |
1032 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1033 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1034 | &curr_msg_ts_ns); | |
1035 | ||
1036 | /* | |
1037 | * Check if the message of the current live stream | |
1038 | * iterator occured at the exact same time or after the | |
1039 | * last message returned by this component's message | |
1040 | * iterator. If not, we return an error. | |
1041 | */ | |
1042 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1043 | stream_iter->current_msg = msg; | |
1044 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
1045 | } else { | |
1046 | /* | |
1047 | * We received a message in the past. To ensure | |
1048 | * monotonicity, we can't send it forward. | |
1049 | */ | |
1419db2b FD |
1050 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1051 | "Message's timestamp is less than " | |
14f28187 FD |
1052 | "lttng-live's message iterator's last " |
1053 | "returned timestamp: " | |
1054 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1055 | "last-msg-ts=%" PRId64, | |
1056 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1057 | lttng_live_msg_iter->last_msg_ts_ns); | |
1058 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1059 | goto end; | |
1060 | } | |
1061 | } | |
1062 | ||
98b15851 | 1063 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1064 | |
1065 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1066 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1067 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1068 | /* |
1069 | * Update the current best candidate message | |
1070 | * for the stream iterator of this live trace | |
1071 | * to be forwarded downstream. | |
1072 | */ | |
a31f4d8b FD |
1073 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1074 | youngest_candidate_stream_iter = stream_iter; | |
1075 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1076 | /* |
1077 | * Order the messages in an arbitrary but | |
1078 | * deterministic way. | |
1079 | */ | |
98b15851 | 1080 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1081 | int ret = common_muxing_compare_messages( |
1082 | stream_iter->current_msg, | |
a31f4d8b | 1083 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1084 | if (ret < 0) { |
1085 | /* | |
a31f4d8b | 1086 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1087 | * should go first. Update the next |
1088 | * iterator and the current timestamp. | |
1089 | */ | |
a31f4d8b FD |
1090 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1091 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1092 | } else if (ret == 0) { |
1093 | /* | |
1094 | * Unable to pick which one should go | |
1095 | * first. | |
1096 | */ | |
1097 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1098 | "stream-iter-addr=%p" | |
1099 | "stream-iter-addr=%p", | |
1100 | stream_iter, | |
a31f4d8b | 1101 | youngest_candidate_stream_iter); |
07afb6bc FD |
1102 | } |
1103 | } | |
14f28187 | 1104 | |
07afb6bc FD |
1105 | stream_iter_idx++; |
1106 | } else { | |
14f28187 | 1107 | /* |
fba9b58e JG |
1108 | * The live stream iterator has ended. That |
1109 | * iterator is removed from the array, but | |
1110 | * there is no need to increment | |
1111 | * stream_iter_idx as | |
1112 | * g_ptr_array_remove_index_fast replaces the | |
1113 | * removed element with the array's last | |
1114 | * element. | |
14f28187 | 1115 | */ |
fba9b58e JG |
1116 | g_ptr_array_remove_index_fast( |
1117 | live_trace->stream_iterators, | |
14f28187 | 1118 | stream_iter_idx); |
14f28187 FD |
1119 | } |
1120 | } | |
1121 | ||
a31f4d8b FD |
1122 | if (youngest_candidate_stream_iter) { |
1123 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1124 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1125 | } else { | |
1126 | /* | |
1127 | * The only case where we don't have a candidate for this trace | |
1128 | * is if we reached the end of all the iterators. | |
1129 | */ | |
1130 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1131 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1132 | } | |
1133 | ||
1134 | end: | |
1135 | return stream_iter_status; | |
1136 | } | |
1137 | ||
1138 | static | |
1139 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1140 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1141 | struct lttng_live_session *session, | |
a31f4d8b | 1142 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1143 | { |
07afb6bc FD |
1144 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1145 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1146 | enum lttng_live_iterator_status stream_iter_status; |
1147 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1148 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1149 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 FD |
1150 | |
1151 | /* | |
1152 | * Make sure we are attached to the session and look for new streams | |
1153 | * and metadata. | |
1154 | */ | |
1155 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1156 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1157 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1158 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1159 | goto end; |
1160 | } | |
14f28187 | 1161 | |
98b15851 | 1162 | BT_ASSERT_DBG(session->traces); |
14f28187 | 1163 | |
14f28187 FD |
1164 | while (trace_idx < session->traces->len) { |
1165 | bool trace_is_ended = false; | |
1166 | struct lttng_live_stream_iterator *stream_iter; | |
1167 | struct lttng_live_trace *trace = | |
1168 | g_ptr_array_index(session->traces, trace_idx); | |
1169 | ||
1170 | stream_iter_status = next_stream_iterator_for_trace( | |
1171 | lttng_live_msg_iter, trace, &stream_iter); | |
1172 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1173 | /* | |
1174 | * All the live stream iterators for this trace are | |
1175 | * ENDed. Remove the trace from this session. | |
1176 | */ | |
1177 | trace_is_ended = true; | |
1178 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1179 | goto end; | |
1180 | } | |
1181 | ||
1182 | if (!trace_is_ended) { | |
98b15851 | 1183 | BT_ASSERT_DBG(stream_iter); |
14f28187 | 1184 | |
a31f4d8b FD |
1185 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1186 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1187 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1188 | youngest_candidate_stream_iter = stream_iter; | |
1189 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1190 | /* |
1191 | * Order the messages in an arbitrary but | |
1192 | * deterministic way. | |
1193 | */ | |
1194 | int ret = common_muxing_compare_messages( | |
1195 | stream_iter->current_msg, | |
a31f4d8b | 1196 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1197 | if (ret < 0) { |
1198 | /* | |
a31f4d8b | 1199 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1200 | * should go first. Update the next iterator |
1201 | * and the current timestamp. | |
1202 | */ | |
a31f4d8b FD |
1203 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1204 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1205 | } else if (ret == 0) { |
1206 | /* Unable to pick which one should go first. */ | |
1207 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1208 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1209 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1210 | } |
14f28187 FD |
1211 | } |
1212 | trace_idx++; | |
1213 | } else { | |
ba90bce7 JG |
1214 | /* |
1215 | * trace_idx is not incremented since | |
1216 | * g_ptr_array_remove_index_fast replaces the | |
1217 | * element at trace_idx with the array's last element. | |
1218 | */ | |
1219 | g_ptr_array_remove_index_fast(session->traces, | |
1220 | trace_idx); | |
14f28187 FD |
1221 | } |
1222 | } | |
a31f4d8b FD |
1223 | if (youngest_candidate_stream_iter) { |
1224 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1225 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1226 | } else { |
14f28187 FD |
1227 | /* |
1228 | * The only cases where we don't have a candidate for this | |
1229 | * trace is: | |
1230 | * 1. if we reached the end of all the iterators of all the | |
1231 | * traces of this session, | |
1232 | * 2. if we never had live stream iterator in the first place. | |
1233 | * | |
1234 | * In either cases, we return END. | |
1235 | */ | |
1236 | BT_ASSERT(session->traces->len == 0); | |
1237 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1238 | } |
1239 | end: | |
14f28187 FD |
1240 | return stream_iter_status; |
1241 | } | |
1242 | ||
1243 | static inline | |
1244 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1245 | { | |
1246 | uint64_t i; | |
1247 | ||
1248 | for (i = 0; i < count; i++) { | |
1249 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1250 | } |
7cdc2bab MD |
1251 | } |
1252 | ||
d3eb6e8f | 1253 | BT_HIDDEN |
d24d5663 | 1254 | bt_component_class_message_iterator_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1255 | bt_self_message_iterator *self_msg_it, |
1256 | bt_message_array_const msgs, uint64_t capacity, | |
1257 | uint64_t *count) | |
d3eb6e8f | 1258 | { |
d24d5663 | 1259 | bt_component_class_message_iterator_next_method_status status; |
14f28187 FD |
1260 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1261 | bt_self_message_iterator_get_data(self_msg_it); | |
1262 | struct lttng_live_component *lttng_live = | |
1263 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1264 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1265 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1266 | enum lttng_live_iterator_status stream_iter_status; |
1267 | uint64_t session_idx; | |
1268 | ||
1269 | *count = 0; | |
1270 | ||
98b15851 | 1271 | BT_ASSERT_DBG(lttng_live_msg_iter); |
14f28187 FD |
1272 | |
1273 | /* | |
1274 | * Clear all the invalid message reference that might be left over in | |
1275 | * the output array. | |
1276 | */ | |
1277 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1278 | ||
1279 | /* | |
1280 | * If no session are exposed on the relay found at the url provided by | |
1281 | * the user, session count will be 0. In this case, we return status | |
1282 | * end to return gracefully. | |
1283 | */ | |
1284 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1285 | if (lttng_live->params.sess_not_found_act != | |
1286 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
d24d5663 | 1287 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
14f28187 FD |
1288 | goto no_session; |
1289 | } else { | |
1290 | /* | |
1291 | * The are no more active session for this session | |
1292 | * name. Retry to create a viewer session for the | |
1293 | * requested session name. | |
1294 | */ | |
1295 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
d24d5663 | 1296 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1297 | goto no_session; |
1298 | } | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1303 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | * Here the muxing of message is done. | |
1308 | * | |
1309 | * We need to iterate over all the streams of all the traces of all the | |
1310 | * viewer sessions in order to get the message with the smallest | |
1311 | * timestamp. In this case, a session is a viewer session and there is | |
1312 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1313 | * kernel). Each viewer session can have multiple traces, for example, | |
1314 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1315 | * | |
1316 | * We iterate over the streams of each traces to update and see what is | |
1317 | * their next message's timestamp. From those timestamps, we select the | |
1318 | * message with the smallest timestamp as the best candidate message | |
1319 | * for that trace and do the same thing across all the sessions. | |
1320 | * | |
1321 | * We then compare the timestamp of best candidate message of all the | |
1322 | * sessions to pick the message with the smallest timestamp and we | |
1323 | * return it. | |
1324 | */ | |
1325 | while (*count < capacity) { | |
a31f4d8b FD |
1326 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1327 | *candidate_stream_iter = NULL; | |
1328 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 | 1329 | |
98b15851 | 1330 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
14f28187 | 1331 | session_idx = 0; |
14f28187 FD |
1332 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1333 | struct lttng_live_session *session = | |
1334 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1335 | session_idx); | |
1336 | ||
1337 | /* Find the best candidate message to send downstream. */ | |
1338 | stream_iter_status = next_stream_iterator_for_session( | |
1339 | lttng_live_msg_iter, session, | |
1340 | &candidate_stream_iter); | |
1341 | ||
1342 | /* If we receive an END status, it means that either: | |
1343 | * - Those traces never had active streams (UST with no | |
1344 | * data produced yet), | |
1345 | * - All live stream iterators have ENDed.*/ | |
1346 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1347 | if (session->closed && session->traces->len == 0) { | |
1348 | /* | |
7d632b96 JG |
1349 | * Remove the session from the list. |
1350 | * session_idx is not modified since | |
1351 | * g_ptr_array_remove_index_fast | |
1352 | * replaces the the removed element with | |
1353 | * the array's last element. | |
14f28187 FD |
1354 | */ |
1355 | g_ptr_array_remove_index_fast( | |
1356 | lttng_live_msg_iter->sessions, | |
1357 | session_idx); | |
14f28187 FD |
1358 | } else { |
1359 | session_idx++; | |
1360 | } | |
1361 | continue; | |
1362 | } | |
1363 | ||
1364 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1365 | goto end; | |
1366 | } | |
1367 | ||
a31f4d8b | 1368 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1369 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1370 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1371 | youngest_stream_iter = candidate_stream_iter; | |
1372 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1373 | /* |
1374 | * The currently selected message to be sent | |
1375 | * downstream next has the exact same timestamp | |
1376 | * that of the current candidate message. We | |
1377 | * must break the tie in a predictable manner. | |
1378 | */ | |
1379 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1380 | /* | |
1381 | * Order the messages in an arbitrary but | |
07afb6bc | 1382 | * deterministic way. |
376fc2bd | 1383 | */ |
07afb6bc FD |
1384 | int ret = common_muxing_compare_messages( |
1385 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1386 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1387 | if (ret < 0) { |
1388 | /* | |
1389 | * The `candidate_stream_iter->current_msg` | |
1390 | * should go first. Update the next | |
1391 | * iterator and the current timestamp. | |
1392 | */ | |
a31f4d8b FD |
1393 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1394 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1395 | } else if (ret == 0) { |
1396 | /* Unable to pick which one should go first. */ | |
1397 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1398 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1399 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1400 | } |
14f28187 FD |
1401 | } |
1402 | ||
1403 | session_idx++; | |
1404 | } | |
1405 | ||
a31f4d8b | 1406 | if (!youngest_stream_iter) { |
14f28187 FD |
1407 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
1408 | goto end; | |
1409 | } | |
1410 | ||
98b15851 | 1411 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
14f28187 | 1412 | /* Ensure monotonicity. */ |
98b15851 | 1413 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
a31f4d8b | 1414 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1415 | |
1416 | /* | |
1417 | * Insert the next message to the message batch. This will set | |
1418 | * stream iterator current messsage to NULL so that next time | |
1419 | * we fetch the next message of that stream iterator | |
1420 | */ | |
a31f4d8b | 1421 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1422 | (*count)++; |
1423 | ||
1424 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1425 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1426 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1427 | |
1428 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1429 | } | |
1430 | end: | |
1431 | switch (stream_iter_status) { | |
1432 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1433 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
1434 | if (*count > 0) { | |
1435 | /* | |
1436 | * We received a again status but we have some messages | |
1437 | * to send downstream. We send them and return OK for | |
1438 | * now. On the next call we return again if there are | |
1439 | * still no new message to send. | |
1440 | */ | |
d24d5663 | 1441 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_OK; |
14f28187 | 1442 | } else { |
d24d5663 | 1443 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1444 | } |
7cdc2bab | 1445 | break; |
14f28187 | 1446 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
d24d5663 | 1447 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1448 | break; |
14f28187 | 1449 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
d24d5663 | 1450 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1451 | break; |
1452 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1453 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1454 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
d24d5663 | 1455 | status = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1456 | /* Put all existing messages on error. */ |
1457 | put_messages(msgs, *count); | |
7cdc2bab | 1458 | break; |
14f28187 FD |
1459 | default: |
1460 | abort(); | |
7cdc2bab | 1461 | } |
14f28187 FD |
1462 | |
1463 | no_session: | |
1464 | return status; | |
7cdc2bab | 1465 | } |
41a2b7ae | 1466 | |
7cdc2bab | 1467 | BT_HIDDEN |
21a9f056 | 1468 | bt_component_class_message_iterator_initialize_method_status lttng_live_msg_iter_init( |
14f28187 | 1469 | bt_self_message_iterator *self_msg_it, |
8d8b141d | 1470 | bt_self_message_iterator_configuration *config, |
14f28187 FD |
1471 | bt_self_component_source *self_comp_src, |
1472 | bt_self_component_port_output *self_port) | |
7cdc2bab | 1473 | { |
21a9f056 FD |
1474 | bt_component_class_message_iterator_initialize_method_status ret = |
1475 | BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_OK; | |
14f28187 | 1476 | bt_self_component *self_comp = |
d24d5663 | 1477 | bt_self_component_source_as_self_component(self_comp_src); |
14f28187 FD |
1478 | struct lttng_live_component *lttng_live; |
1479 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
c01594de | 1480 | bt_logging_level log_level; |
14f28187 FD |
1481 | |
1482 | BT_ASSERT(self_msg_it); | |
1483 | ||
1484 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1485 | log_level = lttng_live->log_level; |
2ece7dd0 | 1486 | self_comp = lttng_live->self_comp; |
14f28187 FD |
1487 | |
1488 | /* There can be only one downstream iterator at the same time. */ | |
1489 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1490 | lttng_live->has_msg_iter = true; | |
1491 | ||
1492 | lttng_live_msg_iter = g_new0(struct lttng_live_msg_iter, 1); | |
1493 | if (!lttng_live_msg_iter) { | |
21a9f056 | 1494 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1495 | goto end; |
7cdc2bab | 1496 | } |
14f28187 | 1497 | |
c01594de | 1498 | lttng_live_msg_iter->log_level = lttng_live->log_level; |
2ece7dd0 | 1499 | lttng_live_msg_iter->self_comp = lttng_live->self_comp; |
14f28187 FD |
1500 | lttng_live_msg_iter->lttng_live_comp = lttng_live; |
1501 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1502 | ||
1503 | lttng_live_msg_iter->active_stream_iter = 0; | |
1504 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1505 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1506 | (GDestroyNotify) lttng_live_destroy_session); | |
1507 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1508 | ||
1509 | lttng_live_msg_iter->viewer_connection = | |
1510 | live_viewer_connection_create(lttng_live->params.url->str, false, | |
1419db2b | 1511 | lttng_live_msg_iter, self_comp, NULL, log_level); |
14f28187 FD |
1512 | if (!lttng_live_msg_iter->viewer_connection) { |
1513 | goto error; | |
1514 | } | |
1515 | ||
1516 | if (lttng_live_create_viewer_session(lttng_live_msg_iter)) { | |
1517 | goto error; | |
1518 | } | |
1519 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1520 | switch (lttng_live->params.sess_not_found_act) { | |
1521 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
2ece7dd0 | 1522 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1523 | "session. Keep trying to connect because of " |
1524 | "%s=\"%s\" component parameter: url=\"%s\"", | |
1525 | SESS_NOT_FOUND_ACTION_PARAM, | |
1526 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1527 | lttng_live->params.url->str); | |
1528 | break; | |
1529 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
1419db2b | 1530 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Unable to connect to the requested live viewer " |
14f28187 FD |
1531 | "session. Fail the message iterator" |
1532 | "initialization because of %s=\"%s\" " | |
1533 | "component parameter: url =\"%s\"", | |
1534 | SESS_NOT_FOUND_ACTION_PARAM, | |
1535 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1536 | lttng_live->params.url->str); | |
7cdc2bab | 1537 | goto error; |
14f28187 | 1538 | case SESSION_NOT_FOUND_ACTION_END: |
2ece7dd0 | 1539 | BT_COMP_LOGI("Unable to connect to the requested live viewer " |
14f28187 FD |
1540 | "session. End gracefully at the first _next() " |
1541 | "call because of %s=\"%s\" component parameter: " | |
1542 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1543 | SESS_NOT_FOUND_ACTION_END_STR, | |
1544 | lttng_live->params.url->str); | |
1545 | break; | |
bce81ff2 | 1546 | default: |
80aff5ef | 1547 | abort(); |
7cdc2bab | 1548 | } |
7cdc2bab MD |
1549 | } |
1550 | ||
14f28187 FD |
1551 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
1552 | ||
1553 | goto end; | |
1554 | error: | |
21a9f056 | 1555 | ret = BT_COMPONENT_CLASS_MESSAGE_ITERATOR_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1556 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1557 | end: |
41a2b7ae | 1558 | return ret; |
7cdc2bab MD |
1559 | } |
1560 | ||
80aff5ef SM |
1561 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1562 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1563 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1564 | }; | |
1565 | ||
7cdc2bab | 1566 | static |
d24d5663 PP |
1567 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1568 | const bt_value *params, const bt_value **result, | |
80aff5ef | 1569 | bt_self_component_class *self_comp_class, |
d24d5663 | 1570 | bt_logging_level log_level) |
7cdc2bab | 1571 | { |
80aff5ef | 1572 | bt_component_class_query_method_status status; |
14f28187 | 1573 | const bt_value *url_value = NULL; |
7cdc2bab | 1574 | const char *url; |
14f28187 | 1575 | struct live_viewer_connection *viewer_connection = NULL; |
80aff5ef SM |
1576 | enum bt_param_validation_status validation_status; |
1577 | gchar *validate_error = NULL; | |
7cdc2bab | 1578 | |
80aff5ef SM |
1579 | validation_status = bt_param_validation_validate(params, |
1580 | list_sessions_params, &validate_error); | |
1581 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1582 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1583 | goto error; |
80aff5ef | 1584 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
a635e507 | 1585 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
1419db2b FD |
1586 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", |
1587 | validate_error); | |
7cdc2bab MD |
1588 | goto error; |
1589 | } | |
1590 | ||
80aff5ef | 1591 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
14f28187 FD |
1592 | url = bt_value_string_get(url_value); |
1593 | ||
550004b4 | 1594 | viewer_connection = live_viewer_connection_create(url, true, NULL, |
1419db2b | 1595 | NULL, self_comp_class, log_level); |
7cdc2bab | 1596 | if (!viewer_connection) { |
1419db2b FD |
1597 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1598 | "Failed to create viewer connection"); | |
80aff5ef | 1599 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
7cdc2bab MD |
1600 | goto error; |
1601 | } | |
1602 | ||
14f28187 | 1603 | status = live_viewer_connection_list_sessions(viewer_connection, |
80aff5ef | 1604 | result); |
d24d5663 | 1605 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
1419db2b FD |
1606 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1607 | "Failed to list viewer sessions"); | |
c7eee084 PP |
1608 | goto error; |
1609 | } | |
1610 | ||
7cdc2bab | 1611 | goto end; |
c7eee084 | 1612 | |
7cdc2bab | 1613 | error: |
14f28187 | 1614 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1615 | |
14f28187 | 1616 | if (status >= 0) { |
d24d5663 | 1617 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1618 | } |
1619 | ||
7cdc2bab MD |
1620 | end: |
1621 | if (viewer_connection) { | |
14f28187 | 1622 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1623 | } |
80aff5ef SM |
1624 | |
1625 | g_free(validate_error); | |
1626 | ||
14f28187 | 1627 | return status; |
7cdc2bab MD |
1628 | } |
1629 | ||
312df793 PP |
1630 | static |
1631 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1632 | const bt_value *params, const bt_value **result, | |
1419db2b | 1633 | bt_self_component_class *self_comp_class, |
312df793 PP |
1634 | bt_logging_level log_level) |
1635 | { | |
1636 | bt_component_class_query_method_status status = | |
1637 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1638 | const bt_value *input_type_value; | |
1639 | const bt_value *input_value; | |
1640 | double weight = 0; | |
1641 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1642 | ||
1643 | /* Used by the logging macros */ | |
1644 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1645 | ||
1646 | *result = NULL; | |
1647 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1648 | "type"); | |
1649 | if (!input_type_value) { | |
1419db2b FD |
1650 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1651 | "Missing expected `type` parameter."); | |
312df793 PP |
1652 | goto error; |
1653 | } | |
1654 | ||
1655 | if (!bt_value_is_string(input_type_value)) { | |
1419db2b FD |
1656 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1657 | "`type` parameter is not a string value."); | |
312df793 PP |
1658 | goto error; |
1659 | } | |
1660 | ||
1661 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1662 | /* We don't handle file system paths */ | |
1663 | goto create_result; | |
1664 | } | |
1665 | ||
1666 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1667 | if (!input_value) { | |
1419db2b FD |
1668 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1669 | "Missing expected `input` parameter."); | |
312df793 PP |
1670 | goto error; |
1671 | } | |
1672 | ||
1673 | if (!bt_value_is_string(input_value)) { | |
1419db2b FD |
1674 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1675 | "`input` parameter is not a string value."); | |
312df793 PP |
1676 | goto error; |
1677 | } | |
1678 | ||
1679 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1680 | NULL, 0); | |
1681 | if (parts.session_name) { | |
1682 | /* | |
1683 | * Looks pretty much like an LTTng live URL: we got the | |
1684 | * session name part, which forms a complete URL. | |
1685 | */ | |
1686 | weight = .75; | |
1687 | } | |
1688 | ||
1689 | create_result: | |
1690 | *result = bt_value_real_create_init(weight); | |
1691 | if (!*result) { | |
1692 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
1693 | goto error; | |
1694 | } | |
1695 | ||
1696 | goto end; | |
1697 | ||
1698 | error: | |
1699 | if (status >= 0) { | |
1700 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1701 | } | |
1702 | ||
1703 | BT_ASSERT(!*result); | |
1704 | ||
1705 | end: | |
1706 | bt_common_destroy_lttng_live_url_parts(&parts); | |
1707 | return status; | |
1708 | } | |
1709 | ||
7cdc2bab | 1710 | BT_HIDDEN |
d24d5663 PP |
1711 | bt_component_class_query_method_status lttng_live_query( |
1712 | bt_self_component_class_source *comp_class, | |
3c729b9a | 1713 | bt_private_query_executor *priv_query_exec, |
14f28187 | 1714 | const char *object, const bt_value *params, |
7c14d641 | 1715 | __attribute__((unused)) void *method_data, |
3c729b9a | 1716 | const bt_value **result) |
7cdc2bab | 1717 | { |
d24d5663 PP |
1718 | bt_component_class_query_method_status status = |
1719 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 1720 | bt_self_component *self_comp = NULL; |
80aff5ef SM |
1721 | bt_self_component_class *self_comp_class = |
1722 | bt_self_component_class_source_as_self_component_class(comp_class); | |
3c729b9a PP |
1723 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
1724 | bt_private_query_executor_as_query_executor_const( | |
1725 | priv_query_exec)); | |
c7eee084 | 1726 | |
7cdc2bab | 1727 | if (strcmp(object, "sessions") == 0) { |
c01594de | 1728 | status = lttng_live_query_list_sessions(params, result, |
80aff5ef | 1729 | self_comp_class, log_level); |
312df793 PP |
1730 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
1731 | status = lttng_live_query_support_info(params, result, | |
1419db2b | 1732 | self_comp_class, log_level); |
14f28187 | 1733 | } else { |
32a09ecd | 1734 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 1735 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 1736 | goto end; |
7cdc2bab | 1737 | } |
14f28187 FD |
1738 | |
1739 | end: | |
1740 | return status; | |
7cdc2bab MD |
1741 | } |
1742 | ||
1743 | static | |
1744 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
1745 | { | |
19bdff20 FD |
1746 | if (!lttng_live) { |
1747 | return; | |
1748 | } | |
14f28187 FD |
1749 | if (lttng_live->params.url) { |
1750 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
1751 | } |
1752 | g_free(lttng_live); | |
1753 | } | |
1754 | ||
1755 | BT_HIDDEN | |
14f28187 | 1756 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 1757 | { |
14f28187 | 1758 | void *data = bt_self_component_get_data( |
0f1979c3 | 1759 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
1760 | |
1761 | if (!data) { | |
1762 | return; | |
1763 | } | |
1764 | lttng_live_component_destroy_data(data); | |
1765 | } | |
1766 | ||
1767 | static | |
14f28187 FD |
1768 | enum session_not_found_action parse_session_not_found_action_param( |
1769 | const bt_value *no_session_param) | |
1770 | { | |
1771 | enum session_not_found_action action; | |
80aff5ef SM |
1772 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
1773 | ||
14f28187 FD |
1774 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
1775 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
1776 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
1777 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
14f28187 | 1778 | } else { |
80aff5ef SM |
1779 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
1780 | action = SESSION_NOT_FOUND_ACTION_END; | |
14f28187 FD |
1781 | } |
1782 | ||
1783 | return action; | |
1784 | } | |
1785 | ||
80aff5ef SM |
1786 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
1787 | .type = BT_VALUE_TYPE_STRING, | |
1788 | }; | |
1789 | ||
1790 | static const char *sess_not_found_action_choices[] = { | |
1791 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1792 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1793 | SESS_NOT_FOUND_ACTION_END_STR, | |
1794 | }; | |
1795 | ||
1796 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
1797 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
1798 | .min_length = 1, | |
1799 | .max_length = 1, | |
1800 | .element_type = &inputs_elem_descr, | |
1801 | } } }, | |
1802 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
1803 | .choices = sess_not_found_action_choices, | |
1804 | } } }, | |
1805 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1806 | }; | |
1807 | ||
70384700 | 1808 | static |
80aff5ef SM |
1809 | bt_component_class_initialize_method_status lttng_live_component_create( |
1810 | const bt_value *params, | |
1811 | bt_logging_level log_level, | |
1812 | bt_self_component *self_comp, | |
1813 | struct lttng_live_component **component) | |
7cdc2bab | 1814 | { |
80aff5ef | 1815 | struct lttng_live_component *lttng_live = NULL; |
312df793 PP |
1816 | const bt_value *inputs_value; |
1817 | const bt_value *url_value; | |
1818 | const bt_value *value; | |
7cdc2bab | 1819 | const char *url; |
80aff5ef SM |
1820 | enum bt_param_validation_status validation_status; |
1821 | gchar *validation_error = NULL; | |
1822 | bt_component_class_initialize_method_status status; | |
1823 | ||
1824 | validation_status = bt_param_validation_validate(params, params_descr, | |
1825 | &validation_error); | |
1826 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1827 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
1828 | goto error; | |
1829 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
1830 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
1831 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
1832 | goto error; | |
1833 | } | |
7cdc2bab MD |
1834 | |
1835 | lttng_live = g_new0(struct lttng_live_component, 1); | |
1836 | if (!lttng_live) { | |
80aff5ef | 1837 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1838 | goto end; |
1839 | } | |
c01594de | 1840 | lttng_live->log_level = log_level; |
2ece7dd0 | 1841 | lttng_live->self_comp = self_comp; |
7cdc2bab | 1842 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
1843 | lttng_live->has_msg_iter = false; |
1844 | ||
80aff5ef SM |
1845 | inputs_value = |
1846 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
1847 | url_value = | |
1848 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
312df793 | 1849 | url = bt_value_string_get(url_value); |
80aff5ef | 1850 | |
14f28187 FD |
1851 | lttng_live->params.url = g_string_new(url); |
1852 | if (!lttng_live->params.url) { | |
80aff5ef | 1853 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
1854 | goto error; |
1855 | } | |
14f28187 FD |
1856 | |
1857 | value = bt_value_map_borrow_entry_value_const(params, | |
1858 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 | 1859 | if (value) { |
14f28187 FD |
1860 | lttng_live->params.sess_not_found_act = |
1861 | parse_session_not_found_action_param(value); | |
14f28187 | 1862 | } else { |
312df793 PP |
1863 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
1864 | "defaulting to `%s`.", | |
14f28187 FD |
1865 | SESS_NOT_FOUND_ACTION_PARAM, |
1866 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
1867 | lttng_live->params.sess_not_found_act = | |
1868 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 1869 | } |
4c66436f | 1870 | |
80aff5ef | 1871 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
1872 | goto end; |
1873 | ||
1874 | error: | |
1875 | lttng_live_component_destroy_data(lttng_live); | |
1876 | lttng_live = NULL; | |
1877 | end: | |
80aff5ef SM |
1878 | g_free(validation_error); |
1879 | ||
1880 | *component = lttng_live; | |
1881 | return status; | |
d3e4dcd8 PP |
1882 | } |
1883 | ||
f3bc2010 | 1884 | BT_HIDDEN |
21a9f056 | 1885 | bt_component_class_initialize_method_status lttng_live_component_init( |
c01594de | 1886 | bt_self_component_source *self_comp_src, |
59225a3e SM |
1887 | bt_self_component_source_configuration *config, |
1888 | const bt_value *params, | |
1889 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 1890 | { |
7cdc2bab | 1891 | struct lttng_live_component *lttng_live; |
80aff5ef | 1892 | bt_component_class_initialize_method_status ret; |
c01594de PP |
1893 | bt_self_component *self_comp = |
1894 | bt_self_component_source_as_self_component(self_comp_src); | |
1895 | bt_logging_level log_level = bt_component_get_logging_level( | |
1896 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 1897 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 1898 | |
80aff5ef SM |
1899 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
1900 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
19bdff20 | 1901 | goto error; |
7cdc2bab MD |
1902 | } |
1903 | ||
d24d5663 PP |
1904 | add_port_status = bt_self_component_source_add_output_port( |
1905 | self_comp_src, "out", NULL, NULL); | |
80aff5ef SM |
1906 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
1907 | ret = (int) add_port_status; | |
1908 | goto end; | |
147337a3 | 1909 | } |
7cdc2bab | 1910 | |
c01594de | 1911 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 1912 | goto end; |
7cdc2bab | 1913 | |
19bdff20 FD |
1914 | error: |
1915 | lttng_live_component_destroy_data(lttng_live); | |
1916 | lttng_live = NULL; | |
7cdc2bab MD |
1917 | end: |
1918 | return ret; | |
d85ef162 | 1919 | } |