Commit | Line | Data |
---|---|---|
f3bc2010 | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
f3bc2010 | 3 | * |
14f28187 | 4 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
f3bc2010 | 5 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
7cdc2bab | 6 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 | 7 | * |
0235b0db | 8 | * Babeltrace CTF LTTng-live Client Component |
f3bc2010 JG |
9 | */ |
10 | ||
2ece7dd0 | 11 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 12 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 13 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE" |
d9c39b0a | 14 | #include "logging/comp-logging.h" |
020bc26f | 15 | |
14f28187 | 16 | #include <inttypes.h> |
c4f23e30 | 17 | #include <stdbool.h> |
14f28187 FD |
18 | #include <unistd.h> |
19 | ||
3c22a242 FD |
20 | #include <glib.h> |
21 | ||
578e048b | 22 | #include "common/assert.h" |
3fadfbc0 | 23 | #include <babeltrace2/babeltrace.h> |
578e048b | 24 | #include "compat/compiler.h" |
3fadfbc0 | 25 | #include <babeltrace2/types.h> |
f3bc2010 | 26 | |
376fc2bd | 27 | #include "plugins/common/muxing/muxing.h" |
80aff5ef | 28 | #include "plugins/common/param-validation/param-validation.h" |
376fc2bd | 29 | |
7cdc2bab MD |
30 | #include "data-stream.h" |
31 | #include "metadata.h" | |
14f28187 | 32 | #include "lttng-live.h" |
7cdc2bab | 33 | |
14f28187 FD |
34 | #define MAX_QUERY_SIZE (256*1024) |
35 | #define URL_PARAM "url" | |
312df793 | 36 | #define INPUTS_PARAM "inputs" |
14f28187 FD |
37 | #define SESS_NOT_FOUND_ACTION_PARAM "session-not-found-action" |
38 | #define SESS_NOT_FOUND_ACTION_CONTINUE_STR "continue" | |
39 | #define SESS_NOT_FOUND_ACTION_FAIL_STR "fail" | |
40 | #define SESS_NOT_FOUND_ACTION_END_STR "end" | |
7cdc2bab | 41 | |
2ece7dd0 | 42 | #define print_dbg(fmt, ...) BT_COMP_LOGD(fmt, ## __VA_ARGS__) |
7cdc2bab | 43 | |
14f28187 | 44 | static |
b607a4f7 FD |
45 | const char *lttng_live_iterator_status_string( |
46 | enum lttng_live_iterator_status status) | |
14f28187 FD |
47 | { |
48 | switch (status) { | |
49 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: | |
50 | return "LTTNG_LIVE_ITERATOR_STATUS_CONTINUE"; | |
51 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
52 | return "LTTNG_LIVE_ITERATOR_STATUS_AGAIN"; | |
53 | case LTTNG_LIVE_ITERATOR_STATUS_END: | |
54 | return "LTTNG_LIVE_ITERATOR_STATUS_END"; | |
55 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
56 | return "LTTNG_LIVE_ITERATOR_STATUS_OK"; | |
57 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
58 | return "LTTNG_LIVE_ITERATOR_STATUS_INVAL"; | |
59 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
60 | return "LTTNG_LIVE_ITERATOR_STATUS_ERROR"; | |
61 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: | |
62 | return "LTTNG_LIVE_ITERATOR_STATUS_NOMEM"; | |
63 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
64 | return "LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED"; | |
65 | default: | |
498e7994 | 66 | bt_common_abort(); |
14f28187 FD |
67 | } |
68 | } | |
69 | ||
70 | static | |
ecb4ba8a | 71 | const char *lttng_live_stream_state_string(enum lttng_live_stream_state state) |
7cdc2bab | 72 | { |
ecb4ba8a | 73 | switch (state) { |
7cdc2bab MD |
74 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: |
75 | return "ACTIVE_NO_DATA"; | |
76 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: | |
77 | return "QUIESCENT_NO_DATA"; | |
78 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
79 | return "QUIESCENT"; | |
80 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
81 | return "ACTIVE_DATA"; | |
82 | case LTTNG_LIVE_STREAM_EOF: | |
83 | return "EOF"; | |
84 | default: | |
85 | return "ERROR"; | |
86 | } | |
87 | } | |
7cdc2bab | 88 | |
34533ae0 FD |
89 | void lttng_live_stream_iterator_set_state(struct lttng_live_stream_iterator *stream_iter, |
90 | enum lttng_live_stream_state new_state) | |
91 | { | |
92 | bt_self_component *self_comp = stream_iter->self_comp; | |
93 | bt_logging_level log_level = stream_iter->log_level; | |
94 | ||
95 | BT_COMP_LOGD("Setting live stream iterator state: viewer-stream-id=%" PRIu64 | |
96 | ", old-state=%s, new-state=%s", | |
97 | stream_iter->viewer_stream_id, | |
98 | lttng_live_stream_state_string(stream_iter->state), | |
99 | lttng_live_stream_state_string(new_state)); | |
100 | ||
101 | stream_iter->state = new_state; | |
102 | } | |
103 | ||
ecb4ba8a | 104 | #define LTTNG_LIVE_LOGD_STREAM_ITER(live_stream_iter) \ |
14f28187 | 105 | do { \ |
ecb4ba8a FD |
106 | BT_COMP_LOGD("Live stream iterator state=%s, last-inact-ts=%" PRId64 \ |
107 | ", curr-inact-ts %" PRId64, \ | |
108 | lttng_live_stream_state_string(live_stream_iter->state), \ | |
14f28187 FD |
109 | live_stream_iter->last_inactivity_ts, \ |
110 | live_stream_iter->current_inactivity_ts); \ | |
111 | } while (0); | |
6f79a7cf MD |
112 | |
113 | BT_HIDDEN | |
9b4f9b42 | 114 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 115 | { |
14f28187 | 116 | bool ret; |
6f79a7cf | 117 | |
9b4f9b42 | 118 | if (!msg_iter) { |
14f28187 FD |
119 | ret = false; |
120 | goto end; | |
7cdc2bab | 121 | } |
7cdc2bab | 122 | |
9b4f9b42 PP |
123 | ret = bt_self_message_iterator_is_interrupted( |
124 | msg_iter->self_msg_iter); | |
4bf0e537 | 125 | |
14f28187 FD |
126 | end: |
127 | return ret; | |
7cdc2bab MD |
128 | } |
129 | ||
130 | static | |
36e94ad6 | 131 | struct lttng_live_trace *lttng_live_session_borrow_trace_by_id(struct lttng_live_session *session, |
7cdc2bab | 132 | uint64_t trace_id) |
d3e4dcd8 | 133 | { |
14f28187 FD |
134 | uint64_t trace_idx; |
135 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 136 | |
14f28187 FD |
137 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
138 | struct lttng_live_trace *trace = | |
139 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 140 | if (trace->id == trace_id) { |
14f28187 FD |
141 | ret_trace = trace; |
142 | goto end; | |
7cdc2bab MD |
143 | } |
144 | } | |
14f28187 FD |
145 | |
146 | end: | |
147 | return ret_trace; | |
d3eb6e8f PP |
148 | } |
149 | ||
7cdc2bab | 150 | static |
14f28187 | 151 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 152 | { |
c01594de | 153 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 154 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 155 | |
ecb4ba8a | 156 | BT_COMP_LOGD("Destroying live trace: trace-id=%"PRIu64, trace->id); |
7cdc2bab | 157 | |
14f28187 FD |
158 | BT_ASSERT(trace->stream_iterators); |
159 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 160 | |
14f28187 FD |
161 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
162 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 163 | |
7cdc2bab | 164 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
165 | g_free(trace); |
166 | } | |
167 | ||
168 | static | |
169 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
170 | uint64_t trace_id) | |
171 | { | |
172 | struct lttng_live_trace *trace = NULL; | |
c01594de | 173 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 174 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab | 175 | |
ecb4ba8a FD |
176 | BT_COMP_LOGD("Creating live trace: " |
177 | "session-id=%"PRIu64", trace-id=%"PRIu64, | |
178 | session->id, trace_id); | |
7cdc2bab MD |
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); |
76bbaebc | 194 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
14f28187 FD |
195 | g_ptr_array_add(session->traces, trace); |
196 | ||
7cdc2bab MD |
197 | goto end; |
198 | error: | |
199 | g_free(trace); | |
200 | trace = NULL; | |
201 | end: | |
202 | return trace; | |
203 | } | |
204 | ||
205 | BT_HIDDEN | |
36e94ad6 | 206 | struct lttng_live_trace *lttng_live_session_borrow_or_create_trace_by_id( |
14f28187 | 207 | struct lttng_live_session *session, uint64_t trace_id) |
7cdc2bab MD |
208 | { |
209 | struct lttng_live_trace *trace; | |
210 | ||
36e94ad6 | 211 | trace = lttng_live_session_borrow_trace_by_id(session, trace_id); |
7cdc2bab | 212 | if (trace) { |
14f28187 | 213 | goto end; |
7cdc2bab | 214 | } |
7cdc2bab | 215 | |
14f28187 FD |
216 | /* The session is the owner of the newly created trace. */ |
217 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 218 | |
14f28187 FD |
219 | end: |
220 | return trace; | |
7cdc2bab MD |
221 | } |
222 | ||
223 | BT_HIDDEN | |
14f28187 | 224 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
225 | uint64_t session_id, const char *hostname, |
226 | const char *session_name) | |
7cdc2bab MD |
227 | { |
228 | int ret = 0; | |
14f28187 | 229 | struct lttng_live_session *session; |
c01594de | 230 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 231 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 232 | |
ecb4ba8a FD |
233 | BT_COMP_LOGD("Adding live session: " |
234 | "session-id=%" PRIu64 ", hostname=\"%s\" session-name=\"%s\"", | |
235 | session_id, hostname, session_name); | |
236 | ||
14f28187 FD |
237 | session = g_new0(struct lttng_live_session, 1); |
238 | if (!session) { | |
1419db2b FD |
239 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
240 | "Failed to allocate live session"); | |
7cdc2bab MD |
241 | goto error; |
242 | } | |
243 | ||
c01594de | 244 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 245 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
246 | session->id = session_id; |
247 | session->traces = g_ptr_array_new_with_free_func( | |
0f1979c3 | 248 | (GDestroyNotify) lttng_live_destroy_trace); |
14f28187 FD |
249 | BT_ASSERT(session->traces); |
250 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
251 | session->new_streams_needed = true; | |
252 | session->hostname = g_string_new(hostname); | |
253 | BT_ASSERT(session->hostname); | |
254 | ||
255 | session->session_name = g_string_new(session_name); | |
256 | BT_ASSERT(session->session_name); | |
7cdc2bab | 257 | |
14f28187 | 258 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); |
7cdc2bab MD |
259 | goto end; |
260 | error: | |
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 | 278 | self_comp = session->self_comp; |
ecb4ba8a FD |
279 | BT_COMP_LOGD("Destroying live session: " |
280 | "session-id=%"PRIu64", session-name=\"%s\"", | |
281 | session->id, session->session_name->str); | |
7cdc2bab | 282 | if (session->id != -1ULL) { |
36e94ad6 | 283 | if (lttng_live_session_detach(session)) { |
0757916e FD |
284 | if (!lttng_live_graph_is_canceled( |
285 | session->lttng_live_msg_iter)) { | |
4c66436f | 286 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 287 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
288 | session->id); |
289 | } | |
7cdc2bab MD |
290 | } |
291 | session->id = -1ULL; | |
292 | } | |
14f28187 FD |
293 | |
294 | if (session->traces) { | |
295 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 296 | } |
14f28187 | 297 | |
06994c71 MD |
298 | if (session->hostname) { |
299 | g_string_free(session->hostname, TRUE); | |
300 | } | |
301 | if (session->session_name) { | |
302 | g_string_free(session->session_name, TRUE); | |
303 | } | |
7cdc2bab | 304 | g_free(session); |
14f28187 FD |
305 | |
306 | end: | |
307 | return; | |
7cdc2bab MD |
308 | } |
309 | ||
14f28187 FD |
310 | static |
311 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 312 | { |
14f28187 FD |
313 | if (!lttng_live_msg_iter) { |
314 | goto end; | |
7cdc2bab | 315 | } |
7cdc2bab | 316 | |
14f28187 FD |
317 | if (lttng_live_msg_iter->sessions) { |
318 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 319 | } |
14f28187 | 320 | |
b9e6ec43 FD |
321 | if (lttng_live_msg_iter->viewer_connection) { |
322 | live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection); | |
323 | } | |
14f28187 FD |
324 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); |
325 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
326 | ||
327 | /* All stream iterators must be destroyed at this point. */ | |
328 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
329 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
330 | ||
331 | g_free(lttng_live_msg_iter); | |
332 | ||
333 | end: | |
334 | return; | |
335 | } | |
336 | ||
337 | BT_HIDDEN | |
338 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
339 | { | |
340 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
341 | ||
342 | BT_ASSERT(self_msg_iter); | |
343 | ||
344 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
345 | BT_ASSERT(lttng_live_msg_iter); | |
346 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
347 | } |
348 | ||
349 | static | |
14f28187 | 350 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
351 | struct lttng_live_stream_iterator *lttng_live_stream) |
352 | { | |
c01594de | 353 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 354 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 355 | |
7cdc2bab MD |
356 | switch (lttng_live_stream->state) { |
357 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
358 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
359 | break; | |
360 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
361 | /* Invalid state. */ | |
2ece7dd0 | 362 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
498e7994 | 363 | bt_common_abort(); |
7cdc2bab MD |
364 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
365 | /* Invalid state. */ | |
2ece7dd0 | 366 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
498e7994 | 367 | bt_common_abort(); |
7cdc2bab MD |
368 | case LTTNG_LIVE_STREAM_EOF: |
369 | break; | |
370 | } | |
14f28187 | 371 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
372 | } |
373 | ||
374 | /* | |
f93afbf9 FD |
375 | * For active no data stream, fetch next index. As a result of that it can |
376 | * become either: | |
377 | * - quiescent: won't have events for a bit, | |
378 | * - have data: need to get that data and produce the event, | |
379 | * - have no data on this stream at this point: need to retry (AGAIN) or return | |
380 | * EOF. | |
7cdc2bab MD |
381 | */ |
382 | static | |
14f28187 FD |
383 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
384 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
385 | struct lttng_live_stream_iterator *lttng_live_stream) |
386 | { | |
c01594de | 387 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 388 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 | 389 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 390 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
0f1979c3 | 391 | struct packet_index index; |
7cdc2bab | 392 | |
76bbaebc FD |
393 | if (lttng_live_stream->trace->metadata_stream_state == |
394 | LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) { | |
f93afbf9 FD |
395 | BT_COMP_LOGD("Need to get an update for the metadata stream before proceeding further with this stream: " |
396 | "stream-name=\"%s\"", lttng_live_stream->name->str); | |
14f28187 | 397 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
398 | goto end; |
399 | } | |
f93afbf9 | 400 | |
7cdc2bab | 401 | if (lttng_live_stream->trace->session->new_streams_needed) { |
f93afbf9 FD |
402 | BT_COMP_LOGD("Need to get an update of all streams before proceeding further with this stream: " |
403 | "stream-name=\"%s\"", lttng_live_stream->name->str); | |
14f28187 | 404 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
405 | goto end; |
406 | } | |
f93afbf9 | 407 | |
14f28187 FD |
408 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
409 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
410 | goto end; |
411 | } | |
14f28187 | 412 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
f93afbf9 | 413 | &index); |
14f28187 | 414 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
415 | goto end; |
416 | } | |
f93afbf9 | 417 | |
98b15851 | 418 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
f93afbf9 | 419 | |
7cdc2bab | 420 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 FD |
421 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
422 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
423 | ||
424 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
425 | last_inact_ts == curr_inact_ts) { | |
426 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
ecb4ba8a | 427 | LTTNG_LIVE_LOGD_STREAM_ITER(lttng_live_stream); |
7cdc2bab | 428 | } else { |
14f28187 | 429 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
430 | } |
431 | goto end; | |
432 | } | |
f93afbf9 | 433 | |
7cdc2bab MD |
434 | lttng_live_stream->base_offset = index.offset; |
435 | lttng_live_stream->offset = index.offset; | |
436 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
f93afbf9 FD |
437 | |
438 | BT_COMP_LOGD("Setting live stream reading info: stream-name=\"%s\", " | |
439 | "viewer-stream-id=%" PRIu64 ", stream-base-offset=%" PRIu64 | |
440 | ", stream-offset=%" PRIu64 ", stream-len=%" PRIu64, | |
441 | lttng_live_stream->name->str, | |
442 | lttng_live_stream->viewer_stream_id, | |
443 | lttng_live_stream->base_offset, | |
444 | lttng_live_stream->offset, lttng_live_stream->len); | |
445 | ||
7cdc2bab | 446 | end: |
14f28187 FD |
447 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
448 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
449 | } |
450 | return ret; | |
451 | } | |
452 | ||
453 | /* | |
14f28187 FD |
454 | * Creation of the message requires the ctf trace class to be created |
455 | * beforehand, but the live protocol gives us all streams (including metadata) | |
456 | * at once. So we split it in three steps: getting streams, getting metadata | |
457 | * (which creates the ctf trace class), and then creating the per-stream | |
458 | * messages. | |
7cdc2bab MD |
459 | */ |
460 | static | |
14f28187 FD |
461 | enum lttng_live_iterator_status lttng_live_get_session( |
462 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
463 | struct lttng_live_session *session) |
464 | { | |
1419db2b FD |
465 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
466 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
467 | enum lttng_live_iterator_status status; |
468 | uint64_t trace_idx; | |
7cdc2bab | 469 | |
14f28187 | 470 | if (!session->attached) { |
f93afbf9 FD |
471 | BT_COMP_LOGD("Attach to session: session-id=%" PRIu64, |
472 | session->id); | |
f79c2d7a | 473 | enum lttng_live_viewer_status attach_status = |
36e94ad6 | 474 | lttng_live_session_attach(session, |
851de941 | 475 | lttng_live_msg_iter->self_msg_iter); |
f79c2d7a | 476 | if (attach_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0757916e | 477 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
1419db2b FD |
478 | /* |
479 | * Clear any causes appended in | |
480 | * `lttng_live_attach_session()` as we want to | |
481 | * return gracefully since the graph was | |
482 | * cancelled. | |
483 | */ | |
484 | bt_current_thread_clear_error(); | |
14f28187 FD |
485 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
486 | } else { | |
487 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1419db2b FD |
488 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
489 | "Error attaching to LTTng live session"); | |
14f28187 FD |
490 | } |
491 | goto end; | |
4c66436f | 492 | } |
7cdc2bab | 493 | } |
14f28187 | 494 | |
f93afbf9 FD |
495 | BT_COMP_LOGD("Updating all streams and metadata for session: " |
496 | "session-id=%" PRIu64 ", session-name=\"%s\"", | |
497 | session->id, session->session_name->str); | |
498 | ||
36e94ad6 | 499 | status = lttng_live_session_get_new_streams(session, |
851de941 | 500 | lttng_live_msg_iter->self_msg_iter); |
14f28187 FD |
501 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
502 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
503 | goto end; | |
7cdc2bab | 504 | } |
f93afbf9 | 505 | |
c28512ab FD |
506 | trace_idx = 0; |
507 | while (trace_idx < session->traces->len) { | |
14f28187 FD |
508 | struct lttng_live_trace *trace = |
509 | g_ptr_array_index(session->traces, trace_idx); | |
510 | ||
7cdc2bab | 511 | status = lttng_live_metadata_update(trace); |
c28512ab | 512 | switch (status) { |
0ca5c4f9 | 513 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
c28512ab FD |
514 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
515 | trace_idx++; | |
516 | break; | |
0ca5c4f9 FD |
517 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: |
518 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
519 | goto end; | |
c28512ab | 520 | default: |
ecb4ba8a FD |
521 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
522 | "Error updating trace metadata: " | |
523 | "stream-iter-status=%s, trace-id=%"PRIu64, | |
524 | lttng_live_iterator_status_string(status), | |
525 | trace->id); | |
14f28187 | 526 | goto end; |
7cdc2bab MD |
527 | } |
528 | } | |
f93afbf9 FD |
529 | |
530 | /* | |
531 | * Now that we have the metadata we can initialize the downstream | |
532 | * iterator. | |
533 | */ | |
851de941 SM |
534 | status = lttng_live_lazy_msg_init(session, |
535 | lttng_live_msg_iter->self_msg_iter); | |
14f28187 FD |
536 | |
537 | end: | |
538 | return status; | |
7cdc2bab MD |
539 | } |
540 | ||
7cdc2bab | 541 | static |
14f28187 | 542 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 543 | { |
14f28187 | 544 | uint64_t session_idx, trace_idx; |
f93afbf9 FD |
545 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
546 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
7cdc2bab | 547 | |
14f28187 FD |
548 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
549 | session_idx++) { | |
550 | struct lttng_live_session *session = | |
551 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
f93afbf9 FD |
552 | BT_COMP_LOGD("Force marking session as needing new streams: " |
553 | "session-id=%" PRIu64, session->id); | |
7cdc2bab | 554 | session->new_streams_needed = true; |
14f28187 FD |
555 | for (trace_idx = 0; trace_idx < session->traces->len; |
556 | trace_idx++) { | |
557 | struct lttng_live_trace *trace = | |
558 | g_ptr_array_index(session->traces, trace_idx); | |
f93afbf9 FD |
559 | BT_COMP_LOGD("Force marking trace metadata state as needing an update: " |
560 | "session-id=%" PRIu64 ", trace-id=%" PRIu64, | |
561 | session->id, trace->id); | |
76bbaebc FD |
562 | |
563 | BT_ASSERT(trace->metadata_stream_state != | |
564 | LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED); | |
565 | ||
566 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; | |
7cdc2bab MD |
567 | } |
568 | } | |
569 | } | |
570 | ||
571 | static | |
14f28187 FD |
572 | enum lttng_live_iterator_status |
573 | lttng_live_iterator_handle_new_streams_and_metadata( | |
574 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 575 | { |
f79c2d7a FD |
576 | enum lttng_live_iterator_status status; |
577 | enum lttng_live_viewer_status viewer_status; | |
1419db2b FD |
578 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
579 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
580 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
581 | struct lttng_live_session *session; | |
582 | enum session_not_found_action sess_not_found_act = | |
583 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
584 | ||
883ffb2f | 585 | BT_COMP_LOGD("Update data and metadata of all sessions: " |
ecb4ba8a | 586 | "live-msg-iter-addr=%p", lttng_live_msg_iter); |
7cdc2bab | 587 | /* |
14f28187 | 588 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
589 | * session" flag to the protocol, which would tell us that we |
590 | * need to query for new sessions even though we have sessions | |
591 | * currently ongoing. | |
592 | */ | |
14f28187 FD |
593 | if (lttng_live_msg_iter->sessions->len == 0) { |
594 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
ecb4ba8a | 595 | BT_COMP_LOGD("No session found. Exiting in accordance with the `session-not-found-action` parameter"); |
f79c2d7a | 596 | status = LTTNG_LIVE_ITERATOR_STATUS_END; |
14f28187 FD |
597 | goto end; |
598 | } else { | |
ecb4ba8a | 599 | BT_COMP_LOGD("No session found. Try creating a new one in accordance with the `session-not-found-action` parameter"); |
14f28187 FD |
600 | /* |
601 | * Retry to create a viewer session for the requested | |
602 | * session name. | |
603 | */ | |
f79c2d7a FD |
604 | viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter); |
605 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
606 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
607 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
608 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
609 | "Error creating LTTng live viewer session"); | |
610 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
611 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
612 | } else { | |
613 | bt_common_abort(); | |
614 | } | |
14f28187 FD |
615 | goto end; |
616 | } | |
617 | } | |
7cdc2bab | 618 | } |
14f28187 FD |
619 | |
620 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
621 | session_idx++) { | |
622 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
623 | session_idx); | |
f79c2d7a FD |
624 | status = lttng_live_get_session(lttng_live_msg_iter, session); |
625 | switch (status) { | |
14f28187 | 626 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 627 | break; |
14f28187 | 628 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
f79c2d7a | 629 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
630 | break; |
631 | default: | |
632 | goto end; | |
633 | } | |
634 | if (!session->closed) { | |
635 | nr_sessions_opened++; | |
636 | } | |
637 | } | |
f79c2d7a FD |
638 | |
639 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
14f28187 | 640 | nr_sessions_opened == 0) { |
f79c2d7a FD |
641 | status = LTTNG_LIVE_ITERATOR_STATUS_END; |
642 | } else { | |
643 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab | 644 | } |
f79c2d7a FD |
645 | |
646 | end: | |
647 | return status; | |
7cdc2bab MD |
648 | } |
649 | ||
650 | static | |
14f28187 FD |
651 | enum lttng_live_iterator_status emit_inactivity_message( |
652 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
653 | struct lttng_live_stream_iterator *stream_iter, | |
cad707e2 | 654 | const bt_message **message, uint64_t timestamp) |
7cdc2bab | 655 | { |
0f1979c3 | 656 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1419db2b FD |
657 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
658 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 659 | bt_message *msg = NULL; |
7cdc2bab | 660 | |
14f28187 FD |
661 | BT_ASSERT(stream_iter->trace->clock_class); |
662 | ||
f93afbf9 FD |
663 | BT_COMP_LOGD("Emitting inactivity message for stream: ctf-stream-id=%" PRIu64 |
664 | ", viewer-stream-id=%" PRIu64 ", timestamp=%" PRIu64, | |
665 | stream_iter->ctf_stream_class_id, | |
666 | stream_iter->viewer_stream_id, timestamp); | |
667 | ||
14f28187 | 668 | msg = bt_message_message_iterator_inactivity_create( |
0f1979c3 FD |
669 | lttng_live_msg_iter->self_msg_iter, |
670 | stream_iter->trace->clock_class, timestamp); | |
d6e69534 | 671 | if (!msg) { |
1419db2b FD |
672 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
673 | "Error emitting message iterator inactivity message"); | |
7cdc2bab MD |
674 | goto error; |
675 | } | |
14f28187 | 676 | |
d6e69534 | 677 | *message = msg; |
7cdc2bab | 678 | end: |
7cdc2bab MD |
679 | return ret; |
680 | ||
681 | error: | |
14f28187 | 682 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 683 | bt_message_put_ref(msg); |
7cdc2bab MD |
684 | goto end; |
685 | } | |
686 | ||
687 | static | |
14f28187 FD |
688 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
689 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 690 | struct lttng_live_stream_iterator *lttng_live_stream, |
cad707e2 | 691 | const bt_message **message) |
7cdc2bab | 692 | { |
0f1979c3 | 693 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
694 | |
695 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 696 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
697 | } |
698 | ||
f93afbf9 FD |
699 | /* |
700 | * Check if we already sent an inactivty message downstream for this | |
701 | * `current_inactivity_ts` value. | |
702 | */ | |
14f28187 FD |
703 | if (lttng_live_stream->current_inactivity_ts == |
704 | lttng_live_stream->last_inactivity_ts) { | |
34533ae0 FD |
705 | lttng_live_stream_iterator_set_state(lttng_live_stream, |
706 | LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA); | |
707 | ||
14f28187 FD |
708 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
709 | goto end; | |
710 | } | |
711 | ||
712 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0f1979c3 | 713 | message, lttng_live_stream->current_inactivity_ts); |
14f28187 FD |
714 | |
715 | lttng_live_stream->last_inactivity_ts = | |
0f1979c3 | 716 | lttng_live_stream->current_inactivity_ts; |
14f28187 FD |
717 | end: |
718 | return ret; | |
719 | } | |
720 | ||
721 | static | |
722 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
723 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
724 | const bt_message *msg, int64_t last_msg_ts_ns, | |
725 | int64_t *ts_ns) | |
726 | { | |
727 | const bt_clock_class *clock_class = NULL; | |
728 | const bt_clock_snapshot *clock_snapshot = NULL; | |
729 | int ret = 0; | |
c01594de | 730 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 731 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 732 | |
98b15851 PP |
733 | BT_ASSERT_DBG(msg); |
734 | BT_ASSERT_DBG(ts_ns); | |
14f28187 | 735 | |
2ece7dd0 | 736 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
737 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
738 | last_msg_ts_ns); | |
739 | ||
740 | switch (bt_message_get_type(msg)) { | |
741 | case BT_MESSAGE_TYPE_EVENT: | |
0f1979c3 | 742 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
14f28187 | 743 | msg); |
98b15851 | 744 | BT_ASSERT_DBG(clock_class); |
14f28187 | 745 | |
0cbc2c33 PP |
746 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
747 | msg); | |
14f28187 FD |
748 | break; |
749 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0f1979c3 | 750 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
751 | msg); |
752 | BT_ASSERT(clock_class); | |
753 | ||
0cbc2c33 PP |
754 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
755 | msg); | |
14f28187 FD |
756 | break; |
757 | case BT_MESSAGE_TYPE_PACKET_END: | |
0f1979c3 | 758 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
759 | msg); |
760 | BT_ASSERT(clock_class); | |
761 | ||
0cbc2c33 PP |
762 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
763 | msg); | |
14f28187 FD |
764 | break; |
765 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0f1979c3 | 766 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
767 | msg); |
768 | BT_ASSERT(clock_class); | |
769 | ||
9b24b6aa | 770 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 771 | msg); |
14f28187 FD |
772 | break; |
773 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0f1979c3 | 774 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
775 | msg); |
776 | BT_ASSERT(clock_class); | |
777 | ||
9b24b6aa | 778 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 779 | msg); |
14f28187 | 780 | break; |
14f28187 | 781 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
60d02328 | 782 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_clock_snapshot_const( |
0f1979c3 | 783 | msg); |
14f28187 FD |
784 | break; |
785 | default: | |
786 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 787 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 788 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
789 | goto end; |
790 | } | |
791 | ||
14f28187 | 792 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
98b15851 | 793 | BT_ASSERT_DBG(clock_class); |
14f28187 FD |
794 | |
795 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
796 | if (ret) { | |
1419db2b FD |
797 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
798 | "Cannot get nanoseconds from Epoch of clock snapshot: " | |
14f28187 FD |
799 | "clock-snapshot-addr=%p", clock_snapshot); |
800 | goto error; | |
801 | } | |
802 | ||
803 | goto end; | |
804 | ||
14f28187 FD |
805 | error: |
806 | ret = -1; | |
7cdc2bab | 807 | |
7cdc2bab | 808 | end: |
14f28187 | 809 | if (ret == 0) { |
2ece7dd0 | 810 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
811 | "iter-data-addr=%p, msg-addr=%p, " |
812 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
813 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
814 | } | |
815 | ||
7cdc2bab MD |
816 | return ret; |
817 | } | |
818 | ||
819 | static | |
14f28187 FD |
820 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
821 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 822 | struct lttng_live_stream_iterator *lttng_live_stream, |
cad707e2 | 823 | const bt_message **message) |
7cdc2bab | 824 | { |
14f28187 | 825 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
c01594de | 826 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 827 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
18a1979b | 828 | enum ctf_msg_iter_status status; |
0f1979c3 | 829 | uint64_t session_idx, trace_idx; |
7cdc2bab | 830 | |
14f28187 FD |
831 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
832 | session_idx++) { | |
833 | struct lttng_live_session *session = | |
834 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
835 | |
836 | if (session->new_streams_needed) { | |
f93afbf9 FD |
837 | BT_COMP_LOGD("Need an update for streams: " |
838 | "session-id=%" PRIu64, session->id); | |
14f28187 FD |
839 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
840 | goto end; | |
7cdc2bab | 841 | } |
14f28187 FD |
842 | for (trace_idx = 0; trace_idx < session->traces->len; |
843 | trace_idx++) { | |
844 | struct lttng_live_trace *trace = | |
845 | g_ptr_array_index(session->traces, trace_idx); | |
76bbaebc | 846 | if (trace->metadata_stream_state == LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) { |
f93afbf9 FD |
847 | BT_COMP_LOGD("Need an update for metadata stream: " |
848 | "session-id=%" PRIu64 ", trace-id=%" PRIu64, | |
849 | session->id, trace->id); | |
14f28187 FD |
850 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
851 | goto end; | |
7cdc2bab MD |
852 | } |
853 | } | |
854 | } | |
855 | ||
856 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 | 857 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
ecb4ba8a FD |
858 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
859 | "Invalid state of live stream iterator" | |
860 | "stream-iter-status=%s", | |
861 | lttng_live_stream_state_string(lttng_live_stream->state)); | |
14f28187 | 862 | goto end; |
7cdc2bab | 863 | } |
14f28187 | 864 | |
851de941 SM |
865 | status = ctf_msg_iter_get_next_message( |
866 | lttng_live_stream->msg_iter, message); | |
7cdc2bab | 867 | switch (status) { |
18a1979b | 868 | case CTF_MSG_ITER_STATUS_EOF: |
14f28187 | 869 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 870 | break; |
18a1979b | 871 | case CTF_MSG_ITER_STATUS_OK: |
14f28187 | 872 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 873 | break; |
18a1979b | 874 | case CTF_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
875 | /* |
876 | * Continue immediately (end of packet). The next | |
877 | * get_index may return AGAIN to delay the following | |
878 | * attempt. | |
879 | */ | |
14f28187 | 880 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 881 | break; |
18a1979b | 882 | case CTF_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 883 | default: |
14f28187 | 884 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1419db2b | 885 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
ecb4ba8a FD |
886 | "CTF message iterator failed to get next message: " |
887 | "msg-iter=%p, msg-iter-status=%s", | |
888 | lttng_live_stream->msg_iter, | |
889 | ctf_msg_iter_status_string(status)); | |
7cdc2bab MD |
890 | break; |
891 | } | |
14f28187 FD |
892 | |
893 | end: | |
7cdc2bab MD |
894 | return ret; |
895 | } | |
896 | ||
4a39caef FD |
897 | static |
898 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
899 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
900 | struct lttng_live_stream_iterator *stream_iter, | |
cad707e2 | 901 | const bt_message **curr_msg) |
4a39caef FD |
902 | { |
903 | enum lttng_live_iterator_status live_status = | |
904 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1419db2b FD |
905 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
906 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
f93afbf9 FD |
907 | |
908 | BT_COMP_LOGD("Closing live stream iterator: stream-name=\"%s\", " | |
909 | "viewer-stream-id=%" PRIu64, stream_iter->name->str, | |
910 | stream_iter->viewer_stream_id); | |
911 | ||
4a39caef FD |
912 | /* |
913 | * The viewer has hung up on us so we are closing the stream. The | |
18a1979b | 914 | * `ctf_msg_iter` should simply realize that it needs to close the |
4a39caef FD |
915 | * stream properly by emitting the necessary stream end message. |
916 | */ | |
18a1979b | 917 | enum ctf_msg_iter_status status = ctf_msg_iter_get_next_message( |
851de941 | 918 | stream_iter->msg_iter, curr_msg); |
4a39caef | 919 | |
18a1979b | 920 | if (status == CTF_MSG_ITER_STATUS_ERROR) { |
1419db2b FD |
921 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
922 | "Error getting the next message from CTF message iterator"); | |
4a39caef FD |
923 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
924 | goto end; | |
1cda4ff4 FD |
925 | } else if (status == CTF_MSG_ITER_STATUS_EOF) { |
926 | BT_COMP_LOGI("Reached the end of the live stream iterator."); | |
927 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
928 | goto end; | |
4a39caef FD |
929 | } |
930 | ||
18a1979b | 931 | BT_ASSERT(status == CTF_MSG_ITER_STATUS_OK); |
4a39caef FD |
932 | |
933 | end: | |
934 | return live_status; | |
935 | } | |
936 | ||
7cdc2bab MD |
937 | /* |
938 | * helper function: | |
939 | * handle_no_data_streams() | |
940 | * retry: | |
941 | * - for each ACTIVE_NO_DATA stream: | |
942 | * - query relayd for stream data, or quiescence info. | |
943 | * - if need metadata, get metadata, goto retry. | |
944 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
945 | * - if quiescent, move to QUIESCENT streams | |
946 | * - if fetched data, move to ACTIVE_DATA streams | |
947 | * (at this point each stream either has data, or is quiescent) | |
948 | * | |
949 | * | |
950 | * iterator_next: | |
951 | * handle_new_streams_and_metadata() | |
952 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
953 | * - query relayd for metadata | |
954 | * | |
955 | * call handle_active_no_data_streams() | |
956 | * | |
957 | * handle_quiescent_streams() | |
958 | * - if at least one stream is ACTIVE_DATA: | |
959 | * - peek stream event with lowest timestamp -> next_ts | |
960 | * - for each quiescent stream | |
961 | * - if next_ts >= quiescent end | |
962 | * - set state to ACTIVE_NO_DATA | |
963 | * - else | |
964 | * - for each quiescent stream | |
965 | * - set state to ACTIVE_NO_DATA | |
966 | * | |
967 | * call handle_active_no_data_streams() | |
968 | * | |
969 | * handle_active_data_streams() | |
970 | * - if at least one stream is ACTIVE_DATA: | |
971 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 972 | * - make that stream event the current message. |
7cdc2bab MD |
973 | * - move this stream heap position to its next event |
974 | * - if we need to fetch data from relayd, move | |
975 | * stream to ACTIVE_NO_DATA. | |
976 | * - return OK | |
977 | * - return AGAIN | |
978 | * | |
979 | * end criterion: ctrl-c on client. If relayd exits or the session | |
980 | * closes on the relay daemon side, we keep on waiting for streams. | |
981 | * Eventually handle --end timestamp (also an end criterion). | |
982 | * | |
983 | * When disconnected from relayd: try to re-connect endlessly. | |
984 | */ | |
985 | static | |
a31f4d8b | 986 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
987 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
988 | struct lttng_live_stream_iterator *stream_iter, | |
cad707e2 | 989 | const bt_message **curr_msg) |
7cdc2bab | 990 | { |
c01594de | 991 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 992 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 993 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 994 | |
f93afbf9 FD |
995 | BT_COMP_LOGD("Advancing live stream iterator until next message if possible: " |
996 | "stream-name=\"%s\", viewer-stream-id=%" PRIu64, | |
997 | stream_iter->name->str, stream_iter->viewer_stream_id); | |
ecb4ba8a | 998 | |
4a39caef FD |
999 | if (stream_iter->has_stream_hung_up) { |
1000 | /* | |
1001 | * The stream has hung up and the stream was properly closed | |
1002 | * during the last call to the current function. Return _END | |
1003 | * status now so that this stream iterator is removed for the | |
1004 | * stream iterator list. | |
1005 | */ | |
1006 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1007 | goto end; | |
1008 | } | |
1009 | ||
7cdc2bab | 1010 | retry: |
ecb4ba8a | 1011 | LTTNG_LIVE_LOGD_STREAM_ITER(stream_iter); |
f93afbf9 FD |
1012 | |
1013 | /* | |
1014 | * Make sure we have the most recent metadata and possibly some new | |
1015 | * streams. | |
1016 | */ | |
14f28187 | 1017 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0f1979c3 | 1018 | lttng_live_msg_iter); |
14f28187 | 1019 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
1020 | goto end; |
1021 | } | |
f93afbf9 | 1022 | |
14f28187 | 1023 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0f1979c3 | 1024 | lttng_live_msg_iter, stream_iter); |
14f28187 | 1025 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
1026 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1027 | /* | |
1028 | * We overwrite `live_status` since `curr_msg` is | |
1029 | * likely set to a valid message in this function. | |
1030 | */ | |
1031 | live_status = lttng_live_iterator_close_stream( | |
1032 | lttng_live_msg_iter, stream_iter, curr_msg); | |
1033 | } | |
7cdc2bab MD |
1034 | goto end; |
1035 | } | |
f93afbf9 | 1036 | |
14f28187 | 1037 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0f1979c3 | 1038 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 1039 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 1040 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
1041 | goto end; |
1042 | } | |
14f28187 | 1043 | if (*curr_msg) { |
7cdc2bab MD |
1044 | goto end; |
1045 | } | |
14f28187 | 1046 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0f1979c3 | 1047 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 1048 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 1049 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
1050 | } |
1051 | ||
1052 | end: | |
14f28187 | 1053 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
f93afbf9 | 1054 | BT_COMP_LOGD("Ask the relay daemon for an updated view of the data and metadata streams"); |
7cdc2bab | 1055 | goto retry; |
7cdc2bab | 1056 | } |
14f28187 | 1057 | |
f93afbf9 FD |
1058 | BT_COMP_LOGD("Returning from advancing live stream iterator: status=%s" |
1059 | "stream-name=\"%s\", viewer-stream-id=%" PRIu64, | |
1060 | lttng_live_iterator_status_string(live_status), | |
1061 | stream_iter->name->str, stream_iter->viewer_stream_id); | |
1062 | ||
14f28187 | 1063 | return live_status; |
7cdc2bab MD |
1064 | } |
1065 | ||
8ec4d5ff JG |
1066 | static |
1067 | bool is_discarded_packet_or_event_message(const bt_message *msg) | |
1068 | { | |
1069 | const enum bt_message_type msg_type = bt_message_get_type(msg); | |
1070 | ||
1071 | return msg_type == BT_MESSAGE_TYPE_DISCARDED_EVENTS || | |
1072 | msg_type == BT_MESSAGE_TYPE_DISCARDED_PACKETS; | |
1073 | } | |
1074 | ||
1075 | static | |
1076 | enum lttng_live_iterator_status adjust_discarded_packets_message( | |
1077 | bt_self_message_iterator *iter, | |
1078 | const bt_stream *stream, | |
1079 | const bt_message *msg_in, bt_message **msg_out, | |
1080 | uint64_t new_begin_ts) | |
1081 | { | |
1082 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1083 | enum bt_property_availability availability; | |
1084 | const bt_clock_snapshot *clock_snapshot; | |
1085 | uint64_t end_ts; | |
1086 | uint64_t count; | |
1087 | ||
1088 | clock_snapshot = bt_message_discarded_packets_borrow_end_default_clock_snapshot_const(msg_in); | |
1089 | end_ts = bt_clock_snapshot_get_value(clock_snapshot); | |
1090 | ||
1091 | availability = bt_message_discarded_packets_get_count(msg_in, &count); | |
1092 | BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE); | |
1093 | ||
1094 | *msg_out = bt_message_discarded_packets_create_with_default_clock_snapshots( | |
1095 | iter, stream, new_begin_ts, end_ts); | |
1096 | if (!*msg_out) { | |
1097 | status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM; | |
1098 | goto end; | |
1099 | } | |
1100 | ||
1101 | bt_message_discarded_packets_set_count(*msg_out, count); | |
1102 | end: | |
1103 | return status; | |
1104 | } | |
1105 | ||
1106 | static | |
1107 | enum lttng_live_iterator_status adjust_discarded_events_message( | |
1108 | bt_self_message_iterator *iter, | |
1109 | const bt_stream *stream, | |
1110 | const bt_message *msg_in, bt_message **msg_out, | |
1111 | uint64_t new_begin_ts) | |
1112 | { | |
1113 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1114 | enum bt_property_availability availability; | |
1115 | const bt_clock_snapshot *clock_snapshot; | |
1116 | uint64_t end_ts; | |
1117 | uint64_t count; | |
1118 | ||
1119 | clock_snapshot = bt_message_discarded_events_borrow_end_default_clock_snapshot_const(msg_in); | |
1120 | end_ts = bt_clock_snapshot_get_value(clock_snapshot); | |
1121 | ||
1122 | availability = bt_message_discarded_events_get_count(msg_in, &count); | |
1123 | BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE); | |
1124 | ||
1125 | *msg_out = bt_message_discarded_events_create_with_default_clock_snapshots( | |
1126 | iter, stream, new_begin_ts, end_ts); | |
1127 | if (!*msg_out) { | |
1128 | status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM; | |
1129 | goto end; | |
1130 | } | |
1131 | ||
1132 | bt_message_discarded_events_set_count(*msg_out, count); | |
1133 | end: | |
1134 | return status; | |
1135 | } | |
1136 | ||
285951be FD |
1137 | static |
1138 | enum lttng_live_iterator_status handle_late_message( | |
1139 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1140 | struct lttng_live_stream_iterator *stream_iter, | |
1141 | int64_t late_msg_ts_ns, const bt_message *late_msg) | |
1142 | { | |
1143 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
1144 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
1145 | const bt_clock_class *clock_class; | |
1146 | const bt_stream_class *stream_class; | |
1147 | enum bt_clock_class_cycles_to_ns_from_origin_status ts_ns_status; | |
1148 | int64_t last_inactivity_ts_ns; | |
1149 | enum lttng_live_iterator_status stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1150 | ||
1151 | stream_class = bt_stream_borrow_class_const(stream_iter->stream); | |
1152 | clock_class = bt_stream_class_borrow_default_clock_class_const(stream_class); | |
1153 | ||
1154 | ts_ns_status = bt_clock_class_cycles_to_ns_from_origin(clock_class, | |
1155 | stream_iter->last_inactivity_ts, &last_inactivity_ts_ns); | |
1156 | if (ts_ns_status != BT_CLOCK_CLASS_CYCLES_TO_NS_FROM_ORIGIN_STATUS_OK) { | |
1157 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1158 | goto end; | |
1159 | } | |
1160 | ||
1161 | if (last_inactivity_ts_ns > late_msg_ts_ns && | |
1162 | is_discarded_packet_or_event_message(late_msg)) { | |
1163 | /* | |
1164 | * The CTF message iterator emits Discarded Packets and Events | |
1165 | * with synthesized begin and end timestamps from the bounds of | |
1166 | * the last known packet and the newly decoded packet header. | |
1167 | * | |
1168 | * The CTF message iterator is not aware of stream inactivity | |
1169 | * beacons. Hence, we have to adjust the begin timestamp of | |
1170 | * those types of messages if a stream signaled its inactivity | |
1171 | * up until _after_ the last known packet's begin timestamp. | |
1172 | * | |
1173 | * Otherwise, the monotonicity guarantee would not be | |
1174 | * preserved. | |
1175 | */ | |
1176 | const enum bt_message_type msg_type = bt_message_get_type( | |
1177 | late_msg); | |
1178 | enum lttng_live_iterator_status adjust_status = | |
1179 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1180 | bt_message *adjusted_message; | |
1181 | ||
1182 | switch (msg_type) { | |
1183 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
1184 | adjust_status = adjust_discarded_events_message( | |
1185 | lttng_live_msg_iter->self_msg_iter, | |
1186 | stream_iter->stream, | |
1187 | late_msg, &adjusted_message, | |
1188 | stream_iter->last_inactivity_ts); | |
1189 | break; | |
1190 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
1191 | adjust_status = adjust_discarded_packets_message( | |
1192 | lttng_live_msg_iter->self_msg_iter, | |
1193 | stream_iter->stream, | |
1194 | late_msg, &adjusted_message, | |
1195 | stream_iter->last_inactivity_ts); | |
1196 | break; | |
1197 | default: | |
1198 | bt_common_abort(); | |
1199 | } | |
1200 | ||
1201 | if (adjust_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1202 | stream_iter_status = adjust_status; | |
1203 | goto end; | |
1204 | } | |
1205 | ||
1206 | BT_ASSERT_DBG(adjusted_message); | |
1207 | stream_iter->current_msg = adjusted_message; | |
1208 | stream_iter->current_msg_ts_ns = last_inactivity_ts_ns; | |
1209 | } else { | |
1210 | /* | |
1211 | * We received a message in the past. To ensure | |
1212 | * monotonicity, we can't send it forward. | |
1213 | */ | |
1214 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1215 | "Message's timestamp is less than lttng-live's message " | |
1216 | "iterator's last returned timestamp: " | |
1217 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1218 | "last-msg-ts=%" PRId64, | |
1219 | lttng_live_msg_iter, late_msg_ts_ns, | |
1220 | lttng_live_msg_iter->last_msg_ts_ns); | |
1221 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1222 | goto end; | |
1223 | } | |
1224 | end: | |
1225 | return stream_iter_status; | |
1226 | } | |
1227 | ||
7cdc2bab | 1228 | static |
14f28187 FD |
1229 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
1230 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1231 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 1232 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 1233 | { |
a31f4d8b | 1234 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0f1979c3 FD |
1235 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
1236 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 1237 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 1238 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 1239 | uint64_t stream_iter_idx; |
7cdc2bab | 1240 | |
98b15851 PP |
1241 | BT_ASSERT_DBG(live_trace); |
1242 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
ecb4ba8a FD |
1243 | |
1244 | BT_COMP_LOGD("Finding the next stream iterator for trace: " | |
1245 | "trace-id=%"PRIu64, live_trace->id); | |
14f28187 FD |
1246 | /* |
1247 | * Update the current message of every stream iterators of this trace. | |
1248 | * The current msg of every stream must have a timestamp equal or | |
1249 | * larger than the last message returned by this iterator. We must | |
1250 | * ensure monotonicity. | |
1251 | */ | |
1252 | stream_iter_idx = 0; | |
1253 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
1254 | bool stream_iter_is_ended = false; | |
1255 | struct lttng_live_stream_iterator *stream_iter = | |
1256 | g_ptr_array_index(live_trace->stream_iterators, | |
0f1979c3 | 1257 | stream_iter_idx); |
14f28187 FD |
1258 | |
1259 | /* | |
f080b7e2 FD |
1260 | * If there is no current message for this stream, go fetch |
1261 | * one. | |
14f28187 FD |
1262 | */ |
1263 | while (!stream_iter->current_msg) { | |
cad707e2 | 1264 | const bt_message *msg = NULL; |
14f28187 | 1265 | int64_t curr_msg_ts_ns = INT64_MAX; |
f93afbf9 | 1266 | |
a31f4d8b | 1267 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0f1979c3 | 1268 | lttng_live_msg_iter, stream_iter, &msg); |
14f28187 | 1269 | |
14f28187 FD |
1270 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1271 | stream_iter_is_ended = true; | |
1272 | break; | |
1273 | } | |
1274 | ||
1275 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1276 | goto end; | |
1277 | } | |
1278 | ||
98b15851 | 1279 | BT_ASSERT_DBG(msg); |
14f28187 | 1280 | |
f93afbf9 FD |
1281 | BT_COMP_LOGD("Live stream iterator returned message: msg-type=%s" |
1282 | "stream-name=\"%s\", viewer-stream-id=%" PRIu64, | |
1283 | bt_common_message_type_string(bt_message_get_type(msg)), | |
1284 | stream_iter->name->str, stream_iter->viewer_stream_id); | |
1285 | ||
14f28187 FD |
1286 | /* |
1287 | * Get the timestamp in nanoseconds from origin of this | |
1288 | * messsage. | |
1289 | */ | |
1290 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1291 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1292 | &curr_msg_ts_ns); | |
1293 | ||
1294 | /* | |
1295 | * Check if the message of the current live stream | |
118ae153 | 1296 | * iterator occurred at the exact same time or after the |
14f28187 FD |
1297 | * last message returned by this component's message |
1298 | * iterator. If not, we return an error. | |
1299 | */ | |
1300 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1301 | stream_iter->current_msg = msg; | |
1302 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
6488b176 | 1303 | } else { |
285951be FD |
1304 | /* |
1305 | * We received a message from the past. This | |
1306 | * may be fixable but it can also be an error. | |
1307 | */ | |
1308 | stream_iter_status = handle_late_message( | |
1309 | lttng_live_msg_iter, stream_iter, | |
1310 | curr_msg_ts_ns, msg); | |
1311 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
6488b176 | 1312 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
285951be FD |
1313 | "Late message could not be handled correctly: " |
1314 | "lttng-live-msg-iter-addr=%p, " | |
1315 | "stream-name=\"%s\", " | |
1316 | "curr-msg-ts=%" PRId64 | |
1317 | ", last-msg-ts=%" PRId64, | |
1318 | lttng_live_msg_iter, | |
1319 | stream_iter->name->str, | |
1320 | curr_msg_ts_ns, | |
6488b176 JG |
1321 | lttng_live_msg_iter->last_msg_ts_ns); |
1322 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
8ec4d5ff JG |
1323 | goto end; |
1324 | } | |
14f28187 FD |
1325 | } |
1326 | } | |
1327 | ||
98b15851 | 1328 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1329 | |
1330 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1331 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1332 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1333 | /* |
1334 | * Update the current best candidate message | |
1335 | * for the stream iterator of this live trace | |
1336 | * to be forwarded downstream. | |
1337 | */ | |
a31f4d8b FD |
1338 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1339 | youngest_candidate_stream_iter = stream_iter; | |
1340 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1341 | /* |
1342 | * Order the messages in an arbitrary but | |
1343 | * deterministic way. | |
1344 | */ | |
98b15851 | 1345 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1346 | int ret = common_muxing_compare_messages( |
1347 | stream_iter->current_msg, | |
a31f4d8b | 1348 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1349 | if (ret < 0) { |
1350 | /* | |
a31f4d8b | 1351 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1352 | * should go first. Update the next |
1353 | * iterator and the current timestamp. | |
1354 | */ | |
a31f4d8b FD |
1355 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1356 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1357 | } else if (ret == 0) { |
1358 | /* | |
1359 | * Unable to pick which one should go | |
1360 | * first. | |
1361 | */ | |
1362 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1363 | "stream-iter-addr=%p" | |
1364 | "stream-iter-addr=%p", | |
1365 | stream_iter, | |
a31f4d8b | 1366 | youngest_candidate_stream_iter); |
07afb6bc FD |
1367 | } |
1368 | } | |
14f28187 | 1369 | |
07afb6bc FD |
1370 | stream_iter_idx++; |
1371 | } else { | |
14f28187 | 1372 | /* |
fba9b58e JG |
1373 | * The live stream iterator has ended. That |
1374 | * iterator is removed from the array, but | |
1375 | * there is no need to increment | |
1376 | * stream_iter_idx as | |
1377 | * g_ptr_array_remove_index_fast replaces the | |
1378 | * removed element with the array's last | |
1379 | * element. | |
14f28187 | 1380 | */ |
fba9b58e JG |
1381 | g_ptr_array_remove_index_fast( |
1382 | live_trace->stream_iterators, | |
14f28187 | 1383 | stream_iter_idx); |
14f28187 FD |
1384 | } |
1385 | } | |
1386 | ||
a31f4d8b FD |
1387 | if (youngest_candidate_stream_iter) { |
1388 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1389 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1390 | } else { | |
1391 | /* | |
1392 | * The only case where we don't have a candidate for this trace | |
1393 | * is if we reached the end of all the iterators. | |
1394 | */ | |
1395 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1396 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1397 | } | |
1398 | ||
1399 | end: | |
1400 | return stream_iter_status; | |
1401 | } | |
1402 | ||
1403 | static | |
1404 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1405 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1406 | struct lttng_live_session *session, | |
a31f4d8b | 1407 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1408 | { |
07afb6bc FD |
1409 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1410 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1411 | enum lttng_live_iterator_status stream_iter_status; |
1412 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1413 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1414 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 | 1415 | |
ecb4ba8a FD |
1416 | BT_COMP_LOGD("Finding the next stream iterator for session: " |
1417 | "session-id=%"PRIu64, session->id); | |
14f28187 FD |
1418 | /* |
1419 | * Make sure we are attached to the session and look for new streams | |
1420 | * and metadata. | |
1421 | */ | |
1422 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1423 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1424 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1425 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1426 | goto end; |
1427 | } | |
14f28187 | 1428 | |
98b15851 | 1429 | BT_ASSERT_DBG(session->traces); |
14f28187 | 1430 | |
14f28187 FD |
1431 | while (trace_idx < session->traces->len) { |
1432 | bool trace_is_ended = false; | |
1433 | struct lttng_live_stream_iterator *stream_iter; | |
1434 | struct lttng_live_trace *trace = | |
1435 | g_ptr_array_index(session->traces, trace_idx); | |
1436 | ||
1437 | stream_iter_status = next_stream_iterator_for_trace( | |
1438 | lttng_live_msg_iter, trace, &stream_iter); | |
1439 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1440 | /* | |
1441 | * All the live stream iterators for this trace are | |
1442 | * ENDed. Remove the trace from this session. | |
1443 | */ | |
1444 | trace_is_ended = true; | |
1445 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1446 | goto end; | |
1447 | } | |
1448 | ||
1449 | if (!trace_is_ended) { | |
98b15851 | 1450 | BT_ASSERT_DBG(stream_iter); |
14f28187 | 1451 | |
a31f4d8b FD |
1452 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1453 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1454 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1455 | youngest_candidate_stream_iter = stream_iter; | |
1456 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1457 | /* |
1458 | * Order the messages in an arbitrary but | |
1459 | * deterministic way. | |
1460 | */ | |
1461 | int ret = common_muxing_compare_messages( | |
1462 | stream_iter->current_msg, | |
a31f4d8b | 1463 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1464 | if (ret < 0) { |
1465 | /* | |
a31f4d8b | 1466 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1467 | * should go first. Update the next iterator |
1468 | * and the current timestamp. | |
1469 | */ | |
a31f4d8b FD |
1470 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1471 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1472 | } else if (ret == 0) { |
1473 | /* Unable to pick which one should go first. */ | |
1474 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1475 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1476 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1477 | } |
14f28187 FD |
1478 | } |
1479 | trace_idx++; | |
1480 | } else { | |
ba90bce7 JG |
1481 | /* |
1482 | * trace_idx is not incremented since | |
1483 | * g_ptr_array_remove_index_fast replaces the | |
1484 | * element at trace_idx with the array's last element. | |
1485 | */ | |
1486 | g_ptr_array_remove_index_fast(session->traces, | |
1487 | trace_idx); | |
14f28187 FD |
1488 | } |
1489 | } | |
a31f4d8b FD |
1490 | if (youngest_candidate_stream_iter) { |
1491 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1492 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1493 | } else { |
14f28187 FD |
1494 | /* |
1495 | * The only cases where we don't have a candidate for this | |
1496 | * trace is: | |
1497 | * 1. if we reached the end of all the iterators of all the | |
1498 | * traces of this session, | |
1499 | * 2. if we never had live stream iterator in the first place. | |
1500 | * | |
1501 | * In either cases, we return END. | |
1502 | */ | |
1503 | BT_ASSERT(session->traces->len == 0); | |
1504 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1505 | } |
1506 | end: | |
14f28187 FD |
1507 | return stream_iter_status; |
1508 | } | |
1509 | ||
1510 | static inline | |
1511 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1512 | { | |
1513 | uint64_t i; | |
1514 | ||
1515 | for (i = 0; i < count; i++) { | |
1516 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1517 | } |
7cdc2bab MD |
1518 | } |
1519 | ||
d3eb6e8f | 1520 | BT_HIDDEN |
a3f0c7db | 1521 | bt_message_iterator_class_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1522 | bt_self_message_iterator *self_msg_it, |
1523 | bt_message_array_const msgs, uint64_t capacity, | |
1524 | uint64_t *count) | |
d3eb6e8f | 1525 | { |
a3f0c7db | 1526 | bt_message_iterator_class_next_method_status status; |
f79c2d7a | 1527 | enum lttng_live_viewer_status viewer_status; |
14f28187 FD |
1528 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1529 | bt_self_message_iterator_get_data(self_msg_it); | |
1530 | struct lttng_live_component *lttng_live = | |
1531 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1532 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1533 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1534 | enum lttng_live_iterator_status stream_iter_status; |
1535 | uint64_t session_idx; | |
1536 | ||
1537 | *count = 0; | |
1538 | ||
98b15851 | 1539 | BT_ASSERT_DBG(lttng_live_msg_iter); |
14f28187 | 1540 | |
f79c2d7a FD |
1541 | if (G_UNLIKELY(lttng_live_msg_iter->was_interrupted)) { |
1542 | /* | |
1543 | * The iterator was interrupted in a previous call to the | |
1544 | * `_next()` method. We currently do not support generating | |
1545 | * messages after such event. The babeltrace2 CLI should never | |
1546 | * be running the graph after being interrupted. So this check | |
1547 | * is to prevent other graph users from using this live | |
1548 | * iterator in an messed up internal state. | |
1549 | */ | |
a3f0c7db | 1550 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR; |
f79c2d7a FD |
1551 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1552 | "Message iterator was interrupted during a previous call to the `next()` and currently does not support continuing after such event."); | |
1553 | goto end; | |
1554 | } | |
1555 | ||
14f28187 FD |
1556 | /* |
1557 | * Clear all the invalid message reference that might be left over in | |
1558 | * the output array. | |
1559 | */ | |
1560 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1561 | ||
1562 | /* | |
1563 | * If no session are exposed on the relay found at the url provided by | |
1564 | * the user, session count will be 0. In this case, we return status | |
1565 | * end to return gracefully. | |
1566 | */ | |
1567 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1568 | if (lttng_live->params.sess_not_found_act != | |
1569 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
a3f0c7db | 1570 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END; |
f79c2d7a | 1571 | goto end; |
14f28187 FD |
1572 | } else { |
1573 | /* | |
1574 | * The are no more active session for this session | |
1575 | * name. Retry to create a viewer session for the | |
1576 | * requested session name. | |
1577 | */ | |
f79c2d7a FD |
1578 | viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter); |
1579 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1580 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
a3f0c7db | 1581 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR; |
f79c2d7a FD |
1582 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1583 | "Error creating LTTng live viewer session"); | |
1584 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
a3f0c7db | 1585 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN; |
f79c2d7a FD |
1586 | } else { |
1587 | bt_common_abort(); | |
1588 | } | |
1589 | goto end; | |
14f28187 FD |
1590 | } |
1591 | } | |
1592 | } | |
1593 | ||
1594 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1595 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1596 | } | |
1597 | ||
1598 | /* | |
1599 | * Here the muxing of message is done. | |
1600 | * | |
1601 | * We need to iterate over all the streams of all the traces of all the | |
1602 | * viewer sessions in order to get the message with the smallest | |
1603 | * timestamp. In this case, a session is a viewer session and there is | |
1604 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1605 | * kernel). Each viewer session can have multiple traces, for example, | |
1606 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1607 | * | |
1608 | * We iterate over the streams of each traces to update and see what is | |
1609 | * their next message's timestamp. From those timestamps, we select the | |
1610 | * message with the smallest timestamp as the best candidate message | |
1611 | * for that trace and do the same thing across all the sessions. | |
1612 | * | |
1613 | * We then compare the timestamp of best candidate message of all the | |
1614 | * sessions to pick the message with the smallest timestamp and we | |
1615 | * return it. | |
1616 | */ | |
1617 | while (*count < capacity) { | |
a31f4d8b FD |
1618 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1619 | *candidate_stream_iter = NULL; | |
1620 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 | 1621 | |
98b15851 | 1622 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
14f28187 | 1623 | session_idx = 0; |
14f28187 FD |
1624 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1625 | struct lttng_live_session *session = | |
1626 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1627 | session_idx); | |
1628 | ||
1629 | /* Find the best candidate message to send downstream. */ | |
1630 | stream_iter_status = next_stream_iterator_for_session( | |
1631 | lttng_live_msg_iter, session, | |
1632 | &candidate_stream_iter); | |
1633 | ||
1634 | /* If we receive an END status, it means that either: | |
1635 | * - Those traces never had active streams (UST with no | |
1636 | * data produced yet), | |
1637 | * - All live stream iterators have ENDed.*/ | |
1638 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1639 | if (session->closed && session->traces->len == 0) { | |
1640 | /* | |
7d632b96 JG |
1641 | * Remove the session from the list. |
1642 | * session_idx is not modified since | |
1643 | * g_ptr_array_remove_index_fast | |
1644 | * replaces the the removed element with | |
1645 | * the array's last element. | |
14f28187 FD |
1646 | */ |
1647 | g_ptr_array_remove_index_fast( | |
1648 | lttng_live_msg_iter->sessions, | |
1649 | session_idx); | |
14f28187 FD |
1650 | } else { |
1651 | session_idx++; | |
1652 | } | |
1653 | continue; | |
1654 | } | |
1655 | ||
1656 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
f79c2d7a | 1657 | goto return_status; |
14f28187 FD |
1658 | } |
1659 | ||
a31f4d8b | 1660 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1661 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1662 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1663 | youngest_stream_iter = candidate_stream_iter; | |
1664 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1665 | /* |
1666 | * The currently selected message to be sent | |
1667 | * downstream next has the exact same timestamp | |
1668 | * that of the current candidate message. We | |
1669 | * must break the tie in a predictable manner. | |
1670 | */ | |
1671 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1672 | /* | |
1673 | * Order the messages in an arbitrary but | |
07afb6bc | 1674 | * deterministic way. |
376fc2bd | 1675 | */ |
07afb6bc FD |
1676 | int ret = common_muxing_compare_messages( |
1677 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1678 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1679 | if (ret < 0) { |
1680 | /* | |
1681 | * The `candidate_stream_iter->current_msg` | |
1682 | * should go first. Update the next | |
1683 | * iterator and the current timestamp. | |
1684 | */ | |
a31f4d8b FD |
1685 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1686 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1687 | } else if (ret == 0) { |
1688 | /* Unable to pick which one should go first. */ | |
1689 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1690 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1691 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1692 | } |
14f28187 FD |
1693 | } |
1694 | ||
1695 | session_idx++; | |
1696 | } | |
1697 | ||
a31f4d8b | 1698 | if (!youngest_stream_iter) { |
14f28187 | 1699 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
f79c2d7a | 1700 | goto return_status; |
14f28187 FD |
1701 | } |
1702 | ||
98b15851 | 1703 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
14f28187 | 1704 | /* Ensure monotonicity. */ |
98b15851 | 1705 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
a31f4d8b | 1706 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1707 | |
1708 | /* | |
1709 | * Insert the next message to the message batch. This will set | |
1710 | * stream iterator current messsage to NULL so that next time | |
1711 | * we fetch the next message of that stream iterator | |
1712 | */ | |
a31f4d8b | 1713 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1714 | (*count)++; |
1715 | ||
1716 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1717 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1718 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1719 | |
1720 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1721 | } | |
f79c2d7a FD |
1722 | |
1723 | return_status: | |
14f28187 FD |
1724 | switch (stream_iter_status) { |
1725 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1726 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
f79c2d7a FD |
1727 | /* |
1728 | * If we gathered messages, return _OK even if the graph was | |
1729 | * interrupted. This allows for the components downstream to at | |
1730 | * least get the thoses messages. If the graph was indeed | |
1731 | * interrupted there should not be another _next() call as the | |
1732 | * application will tear down the graph. This component class | |
1733 | * doesn't support restarting after an interruption. | |
1734 | */ | |
14f28187 | 1735 | if (*count > 0) { |
a3f0c7db | 1736 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_OK; |
14f28187 | 1737 | } else { |
a3f0c7db | 1738 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1739 | } |
7cdc2bab | 1740 | break; |
14f28187 | 1741 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
a3f0c7db | 1742 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1743 | break; |
14f28187 | 1744 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
b607a4f7 FD |
1745 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1746 | "Memory error preparing the next batch of messages: " | |
1747 | "live-iter-status=%s", | |
1748 | lttng_live_iterator_status_string(stream_iter_status)); | |
a3f0c7db | 1749 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1750 | break; |
1751 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1752 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1753 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
b607a4f7 FD |
1754 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1755 | "Error preparing the next batch of messages: " | |
1756 | "live-iter-status=%s", | |
1757 | lttng_live_iterator_status_string(stream_iter_status)); | |
1758 | ||
a3f0c7db | 1759 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1760 | /* Put all existing messages on error. */ |
1761 | put_messages(msgs, *count); | |
7cdc2bab | 1762 | break; |
14f28187 | 1763 | default: |
498e7994 | 1764 | bt_common_abort(); |
7cdc2bab | 1765 | } |
14f28187 | 1766 | |
f79c2d7a | 1767 | end: |
14f28187 | 1768 | return status; |
7cdc2bab | 1769 | } |
41a2b7ae | 1770 | |
4f74db52 FD |
1771 | static |
1772 | struct lttng_live_msg_iter *lttng_live_msg_iter_create( | |
1773 | struct lttng_live_component *lttng_live_comp, | |
1774 | bt_self_message_iterator *self_msg_it) | |
1775 | { | |
1776 | bt_self_component *self_comp = lttng_live_comp->self_comp; | |
1777 | bt_logging_level log_level = lttng_live_comp->log_level; | |
1778 | ||
1779 | struct lttng_live_msg_iter *lttng_live_msg_iter = | |
1780 | g_new0(struct lttng_live_msg_iter, 1); | |
1781 | if (!lttng_live_msg_iter) { | |
1782 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1783 | "Failed to allocate lttng_live_msg_iter"); | |
1784 | goto end; | |
1785 | } | |
1786 | ||
1787 | lttng_live_msg_iter->log_level = lttng_live_comp->log_level; | |
1788 | lttng_live_msg_iter->self_comp = lttng_live_comp->self_comp; | |
1789 | lttng_live_msg_iter->lttng_live_comp = lttng_live_comp; | |
1790 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1791 | ||
1792 | lttng_live_msg_iter->active_stream_iter = 0; | |
1793 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1794 | lttng_live_msg_iter->was_interrupted = false; | |
1795 | ||
1796 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1797 | (GDestroyNotify) lttng_live_destroy_session); | |
1798 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1799 | ||
1800 | end: | |
1801 | return lttng_live_msg_iter; | |
1802 | ||
1803 | } | |
1804 | ||
7cdc2bab | 1805 | BT_HIDDEN |
a3f0c7db | 1806 | bt_message_iterator_class_initialize_method_status lttng_live_msg_iter_init( |
14f28187 | 1807 | bt_self_message_iterator *self_msg_it, |
8d8b141d | 1808 | bt_self_message_iterator_configuration *config, |
14f28187 | 1809 | bt_self_component_port_output *self_port) |
7cdc2bab | 1810 | { |
a3f0c7db | 1811 | bt_message_iterator_class_initialize_method_status status; |
14f28187 FD |
1812 | struct lttng_live_component *lttng_live; |
1813 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
f79c2d7a | 1814 | enum lttng_live_viewer_status viewer_status; |
c01594de | 1815 | bt_logging_level log_level; |
f615b250 PP |
1816 | bt_self_component *self_comp = |
1817 | bt_self_message_iterator_borrow_component(self_msg_it); | |
14f28187 FD |
1818 | |
1819 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1820 | log_level = lttng_live->log_level; |
2ece7dd0 | 1821 | self_comp = lttng_live->self_comp; |
14f28187 | 1822 | |
4f74db52 | 1823 | |
14f28187 FD |
1824 | /* There can be only one downstream iterator at the same time. */ |
1825 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1826 | lttng_live->has_msg_iter = true; | |
1827 | ||
4f74db52 FD |
1828 | lttng_live_msg_iter = lttng_live_msg_iter_create(lttng_live, |
1829 | self_msg_it); | |
14f28187 | 1830 | if (!lttng_live_msg_iter) { |
a3f0c7db | 1831 | status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
f79c2d7a | 1832 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
4f74db52 FD |
1833 | "Failed to create lttng_live_msg_iter"); |
1834 | goto error; | |
7cdc2bab | 1835 | } |
14f28187 | 1836 | |
f79c2d7a FD |
1837 | viewer_status = live_viewer_connection_create(self_comp, NULL, |
1838 | log_level, lttng_live->params.url->str, false, | |
1839 | lttng_live_msg_iter, <tng_live_msg_iter->viewer_connection); | |
1840 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1841 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
1842 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1843 | "Failed to create viewer connection"); | |
1844 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
1845 | /* | |
1846 | * Interruption in the _iter_init() method is not | |
1847 | * supported. Return an error. | |
1848 | */ | |
1849 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1850 | "Interrupted while creating viewer connection"); | |
1851 | } | |
14f28187 FD |
1852 | goto error; |
1853 | } | |
1854 | ||
f79c2d7a FD |
1855 | viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter); |
1856 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1857 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
1858 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1859 | "Failed to create viewer session"); | |
1860 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
1861 | /* | |
1862 | * Interruption in the _iter_init() method is not | |
1863 | * supported. Return an error. | |
1864 | */ | |
1865 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1866 | "Interrupted when creating viewer session"); | |
1867 | } | |
14f28187 FD |
1868 | goto error; |
1869 | } | |
f79c2d7a | 1870 | |
14f28187 FD |
1871 | if (lttng_live_msg_iter->sessions->len == 0) { |
1872 | switch (lttng_live->params.sess_not_found_act) { | |
1873 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
f79c2d7a | 1874 | BT_COMP_LOGI("Unable to connect to the requested live viewer session. Keep trying to connect because of " |
14f28187 FD |
1875 | "%s=\"%s\" component parameter: url=\"%s\"", |
1876 | SESS_NOT_FOUND_ACTION_PARAM, | |
1877 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1878 | lttng_live->params.url->str); | |
1879 | break; | |
1880 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
f79c2d7a FD |
1881 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1882 | "Unable to connect to the requested live viewer session. Fail the message iterator initialization because of %s=\"%s\" " | |
14f28187 FD |
1883 | "component parameter: url =\"%s\"", |
1884 | SESS_NOT_FOUND_ACTION_PARAM, | |
1885 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1886 | lttng_live->params.url->str); | |
7cdc2bab | 1887 | goto error; |
14f28187 | 1888 | case SESSION_NOT_FOUND_ACTION_END: |
f79c2d7a | 1889 | BT_COMP_LOGI("Unable to connect to the requested live viewer session. End gracefully at the first _next() " |
14f28187 FD |
1890 | "call because of %s=\"%s\" component parameter: " |
1891 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1892 | SESS_NOT_FOUND_ACTION_END_STR, | |
1893 | lttng_live->params.url->str); | |
1894 | break; | |
bce81ff2 | 1895 | default: |
498e7994 | 1896 | bt_common_abort(); |
7cdc2bab | 1897 | } |
7cdc2bab MD |
1898 | } |
1899 | ||
14f28187 | 1900 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
a3f0c7db | 1901 | status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_OK; |
14f28187 | 1902 | goto end; |
f79c2d7a | 1903 | |
14f28187 | 1904 | error: |
a3f0c7db | 1905 | status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1906 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1907 | end: |
f79c2d7a | 1908 | return status; |
7cdc2bab MD |
1909 | } |
1910 | ||
80aff5ef SM |
1911 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1912 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1913 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1914 | }; | |
1915 | ||
7cdc2bab | 1916 | static |
d24d5663 PP |
1917 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1918 | const bt_value *params, const bt_value **result, | |
80aff5ef | 1919 | bt_self_component_class *self_comp_class, |
d24d5663 | 1920 | bt_logging_level log_level) |
7cdc2bab | 1921 | { |
80aff5ef | 1922 | bt_component_class_query_method_status status; |
14f28187 | 1923 | const bt_value *url_value = NULL; |
7cdc2bab | 1924 | const char *url; |
14f28187 | 1925 | struct live_viewer_connection *viewer_connection = NULL; |
f79c2d7a | 1926 | enum lttng_live_viewer_status viewer_status; |
80aff5ef SM |
1927 | enum bt_param_validation_status validation_status; |
1928 | gchar *validate_error = NULL; | |
7cdc2bab | 1929 | |
80aff5ef SM |
1930 | validation_status = bt_param_validation_validate(params, |
1931 | list_sessions_params, &validate_error); | |
1932 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1933 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1934 | goto error; |
80aff5ef | 1935 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
a635e507 | 1936 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
1419db2b FD |
1937 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", |
1938 | validate_error); | |
7cdc2bab MD |
1939 | goto error; |
1940 | } | |
1941 | ||
80aff5ef | 1942 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
14f28187 FD |
1943 | url = bt_value_string_get(url_value); |
1944 | ||
f79c2d7a FD |
1945 | viewer_status = live_viewer_connection_create(NULL, self_comp_class, |
1946 | log_level, url, true, NULL, &viewer_connection); | |
1947 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1948 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
1949 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, | |
1950 | "Failed to create viewer connection"); | |
1951 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1952 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
1953 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; | |
1954 | } else { | |
1955 | bt_common_abort(); | |
1956 | } | |
7cdc2bab MD |
1957 | goto error; |
1958 | } | |
1959 | ||
14f28187 | 1960 | status = live_viewer_connection_list_sessions(viewer_connection, |
80aff5ef | 1961 | result); |
d24d5663 | 1962 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
1419db2b FD |
1963 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1964 | "Failed to list viewer sessions"); | |
c7eee084 PP |
1965 | goto error; |
1966 | } | |
1967 | ||
7cdc2bab | 1968 | goto end; |
c7eee084 | 1969 | |
7cdc2bab | 1970 | error: |
14f28187 | 1971 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1972 | |
14f28187 | 1973 | if (status >= 0) { |
d24d5663 | 1974 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1975 | } |
1976 | ||
7cdc2bab MD |
1977 | end: |
1978 | if (viewer_connection) { | |
14f28187 | 1979 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1980 | } |
80aff5ef SM |
1981 | |
1982 | g_free(validate_error); | |
1983 | ||
14f28187 | 1984 | return status; |
7cdc2bab MD |
1985 | } |
1986 | ||
312df793 PP |
1987 | static |
1988 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1989 | const bt_value *params, const bt_value **result, | |
1419db2b | 1990 | bt_self_component_class *self_comp_class, |
312df793 PP |
1991 | bt_logging_level log_level) |
1992 | { | |
1993 | bt_component_class_query_method_status status = | |
1994 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1995 | const bt_value *input_type_value; | |
1996 | const bt_value *input_value; | |
1997 | double weight = 0; | |
1998 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1999 | ||
2000 | /* Used by the logging macros */ | |
2001 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
2002 | ||
2003 | *result = NULL; | |
2004 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
2005 | "type"); | |
2006 | if (!input_type_value) { | |
1419db2b FD |
2007 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
2008 | "Missing expected `type` parameter."); | |
312df793 PP |
2009 | goto error; |
2010 | } | |
2011 | ||
2012 | if (!bt_value_is_string(input_type_value)) { | |
1419db2b FD |
2013 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
2014 | "`type` parameter is not a string value."); | |
312df793 PP |
2015 | goto error; |
2016 | } | |
2017 | ||
2018 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
2019 | /* We don't handle file system paths */ | |
2020 | goto create_result; | |
2021 | } | |
2022 | ||
2023 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
2024 | if (!input_value) { | |
1419db2b FD |
2025 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
2026 | "Missing expected `input` parameter."); | |
312df793 PP |
2027 | goto error; |
2028 | } | |
2029 | ||
2030 | if (!bt_value_is_string(input_value)) { | |
1419db2b FD |
2031 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
2032 | "`input` parameter is not a string value."); | |
312df793 PP |
2033 | goto error; |
2034 | } | |
2035 | ||
2036 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
2037 | NULL, 0); | |
2038 | if (parts.session_name) { | |
2039 | /* | |
2040 | * Looks pretty much like an LTTng live URL: we got the | |
2041 | * session name part, which forms a complete URL. | |
2042 | */ | |
2043 | weight = .75; | |
2044 | } | |
2045 | ||
2046 | create_result: | |
2047 | *result = bt_value_real_create_init(weight); | |
2048 | if (!*result) { | |
2049 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
2050 | goto error; | |
2051 | } | |
2052 | ||
2053 | goto end; | |
2054 | ||
2055 | error: | |
2056 | if (status >= 0) { | |
2057 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
2058 | } | |
2059 | ||
2060 | BT_ASSERT(!*result); | |
2061 | ||
2062 | end: | |
2063 | bt_common_destroy_lttng_live_url_parts(&parts); | |
2064 | return status; | |
2065 | } | |
2066 | ||
7cdc2bab | 2067 | BT_HIDDEN |
d24d5663 PP |
2068 | bt_component_class_query_method_status lttng_live_query( |
2069 | bt_self_component_class_source *comp_class, | |
3c729b9a | 2070 | bt_private_query_executor *priv_query_exec, |
14f28187 | 2071 | const char *object, const bt_value *params, |
7c14d641 | 2072 | __attribute__((unused)) void *method_data, |
3c729b9a | 2073 | const bt_value **result) |
7cdc2bab | 2074 | { |
d24d5663 PP |
2075 | bt_component_class_query_method_status status = |
2076 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 2077 | bt_self_component *self_comp = NULL; |
80aff5ef SM |
2078 | bt_self_component_class *self_comp_class = |
2079 | bt_self_component_class_source_as_self_component_class(comp_class); | |
3c729b9a PP |
2080 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
2081 | bt_private_query_executor_as_query_executor_const( | |
2082 | priv_query_exec)); | |
c7eee084 | 2083 | |
7cdc2bab | 2084 | if (strcmp(object, "sessions") == 0) { |
c01594de | 2085 | status = lttng_live_query_list_sessions(params, result, |
80aff5ef | 2086 | self_comp_class, log_level); |
312df793 PP |
2087 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
2088 | status = lttng_live_query_support_info(params, result, | |
1419db2b | 2089 | self_comp_class, log_level); |
14f28187 | 2090 | } else { |
32a09ecd | 2091 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 2092 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 2093 | goto end; |
7cdc2bab | 2094 | } |
14f28187 FD |
2095 | |
2096 | end: | |
2097 | return status; | |
7cdc2bab MD |
2098 | } |
2099 | ||
2100 | static | |
2101 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
2102 | { | |
19bdff20 FD |
2103 | if (!lttng_live) { |
2104 | return; | |
2105 | } | |
14f28187 FD |
2106 | if (lttng_live->params.url) { |
2107 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
2108 | } |
2109 | g_free(lttng_live); | |
2110 | } | |
2111 | ||
2112 | BT_HIDDEN | |
14f28187 | 2113 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 2114 | { |
14f28187 | 2115 | void *data = bt_self_component_get_data( |
0f1979c3 | 2116 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
2117 | |
2118 | if (!data) { | |
2119 | return; | |
2120 | } | |
2121 | lttng_live_component_destroy_data(data); | |
2122 | } | |
2123 | ||
2124 | static | |
14f28187 FD |
2125 | enum session_not_found_action parse_session_not_found_action_param( |
2126 | const bt_value *no_session_param) | |
2127 | { | |
2128 | enum session_not_found_action action; | |
80aff5ef SM |
2129 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
2130 | ||
14f28187 FD |
2131 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
2132 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
2133 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
2134 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
14f28187 | 2135 | } else { |
80aff5ef SM |
2136 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
2137 | action = SESSION_NOT_FOUND_ACTION_END; | |
14f28187 FD |
2138 | } |
2139 | ||
2140 | return action; | |
2141 | } | |
2142 | ||
80aff5ef SM |
2143 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
2144 | .type = BT_VALUE_TYPE_STRING, | |
2145 | }; | |
2146 | ||
2147 | static const char *sess_not_found_action_choices[] = { | |
2148 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
2149 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
2150 | SESS_NOT_FOUND_ACTION_END_STR, | |
2151 | }; | |
2152 | ||
2153 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
2154 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
2155 | .min_length = 1, | |
2156 | .max_length = 1, | |
2157 | .element_type = &inputs_elem_descr, | |
2158 | } } }, | |
2159 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
2160 | .choices = sess_not_found_action_choices, | |
2161 | } } }, | |
2162 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
2163 | }; | |
2164 | ||
70384700 | 2165 | static |
80aff5ef SM |
2166 | bt_component_class_initialize_method_status lttng_live_component_create( |
2167 | const bt_value *params, | |
2168 | bt_logging_level log_level, | |
2169 | bt_self_component *self_comp, | |
2170 | struct lttng_live_component **component) | |
7cdc2bab | 2171 | { |
80aff5ef | 2172 | struct lttng_live_component *lttng_live = NULL; |
312df793 PP |
2173 | const bt_value *inputs_value; |
2174 | const bt_value *url_value; | |
2175 | const bt_value *value; | |
7cdc2bab | 2176 | const char *url; |
80aff5ef SM |
2177 | enum bt_param_validation_status validation_status; |
2178 | gchar *validation_error = NULL; | |
2179 | bt_component_class_initialize_method_status status; | |
2180 | ||
2181 | validation_status = bt_param_validation_validate(params, params_descr, | |
2182 | &validation_error); | |
2183 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
2184 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
2185 | goto error; | |
2186 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
2187 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
2188 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
2189 | goto error; | |
2190 | } | |
7cdc2bab MD |
2191 | |
2192 | lttng_live = g_new0(struct lttng_live_component, 1); | |
2193 | if (!lttng_live) { | |
80aff5ef | 2194 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
2195 | goto end; |
2196 | } | |
c01594de | 2197 | lttng_live->log_level = log_level; |
2ece7dd0 | 2198 | lttng_live->self_comp = self_comp; |
7cdc2bab | 2199 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
2200 | lttng_live->has_msg_iter = false; |
2201 | ||
80aff5ef SM |
2202 | inputs_value = |
2203 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
2204 | url_value = | |
2205 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
312df793 | 2206 | url = bt_value_string_get(url_value); |
80aff5ef | 2207 | |
14f28187 FD |
2208 | lttng_live->params.url = g_string_new(url); |
2209 | if (!lttng_live->params.url) { | |
80aff5ef | 2210 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
2211 | goto error; |
2212 | } | |
14f28187 FD |
2213 | |
2214 | value = bt_value_map_borrow_entry_value_const(params, | |
2215 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 | 2216 | if (value) { |
14f28187 FD |
2217 | lttng_live->params.sess_not_found_act = |
2218 | parse_session_not_found_action_param(value); | |
14f28187 | 2219 | } else { |
312df793 PP |
2220 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
2221 | "defaulting to `%s`.", | |
14f28187 FD |
2222 | SESS_NOT_FOUND_ACTION_PARAM, |
2223 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
2224 | lttng_live->params.sess_not_found_act = | |
2225 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 2226 | } |
4c66436f | 2227 | |
80aff5ef | 2228 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
2229 | goto end; |
2230 | ||
2231 | error: | |
2232 | lttng_live_component_destroy_data(lttng_live); | |
2233 | lttng_live = NULL; | |
2234 | end: | |
80aff5ef SM |
2235 | g_free(validation_error); |
2236 | ||
2237 | *component = lttng_live; | |
2238 | return status; | |
d3e4dcd8 PP |
2239 | } |
2240 | ||
f3bc2010 | 2241 | BT_HIDDEN |
21a9f056 | 2242 | bt_component_class_initialize_method_status lttng_live_component_init( |
c01594de | 2243 | bt_self_component_source *self_comp_src, |
59225a3e SM |
2244 | bt_self_component_source_configuration *config, |
2245 | const bt_value *params, | |
2246 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 2247 | { |
7cdc2bab | 2248 | struct lttng_live_component *lttng_live; |
80aff5ef | 2249 | bt_component_class_initialize_method_status ret; |
c01594de PP |
2250 | bt_self_component *self_comp = |
2251 | bt_self_component_source_as_self_component(self_comp_src); | |
2252 | bt_logging_level log_level = bt_component_get_logging_level( | |
2253 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 2254 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 2255 | |
80aff5ef SM |
2256 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
2257 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
19bdff20 | 2258 | goto error; |
7cdc2bab MD |
2259 | } |
2260 | ||
d24d5663 PP |
2261 | add_port_status = bt_self_component_source_add_output_port( |
2262 | self_comp_src, "out", NULL, NULL); | |
80aff5ef SM |
2263 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
2264 | ret = (int) add_port_status; | |
2265 | goto end; | |
147337a3 | 2266 | } |
7cdc2bab | 2267 | |
c01594de | 2268 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 2269 | goto end; |
7cdc2bab | 2270 | |
19bdff20 FD |
2271 | error: |
2272 | lttng_live_component_destroy_data(lttng_live); | |
2273 | lttng_live = NULL; | |
7cdc2bab MD |
2274 | end: |
2275 | return ret; | |
d85ef162 | 2276 | } |