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 | |
ecb4ba8a | 89 | #define LTTNG_LIVE_LOGD_STREAM_ITER(live_stream_iter) \ |
14f28187 | 90 | do { \ |
ecb4ba8a FD |
91 | BT_COMP_LOGD("Live stream iterator state=%s, last-inact-ts=%" PRId64 \ |
92 | ", curr-inact-ts %" PRId64, \ | |
93 | lttng_live_stream_state_string(live_stream_iter->state), \ | |
14f28187 FD |
94 | live_stream_iter->last_inactivity_ts, \ |
95 | live_stream_iter->current_inactivity_ts); \ | |
96 | } while (0); | |
6f79a7cf MD |
97 | |
98 | BT_HIDDEN | |
9b4f9b42 | 99 | bool lttng_live_graph_is_canceled(struct lttng_live_msg_iter *msg_iter) |
6f79a7cf | 100 | { |
14f28187 | 101 | bool ret; |
6f79a7cf | 102 | |
9b4f9b42 | 103 | if (!msg_iter) { |
14f28187 FD |
104 | ret = false; |
105 | goto end; | |
7cdc2bab | 106 | } |
7cdc2bab | 107 | |
9b4f9b42 PP |
108 | ret = bt_self_message_iterator_is_interrupted( |
109 | msg_iter->self_msg_iter); | |
4bf0e537 | 110 | |
14f28187 FD |
111 | end: |
112 | return ret; | |
7cdc2bab MD |
113 | } |
114 | ||
115 | static | |
36e94ad6 | 116 | struct lttng_live_trace *lttng_live_session_borrow_trace_by_id(struct lttng_live_session *session, |
7cdc2bab | 117 | uint64_t trace_id) |
d3e4dcd8 | 118 | { |
14f28187 FD |
119 | uint64_t trace_idx; |
120 | struct lttng_live_trace *ret_trace = NULL; | |
7cdc2bab | 121 | |
14f28187 FD |
122 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
123 | struct lttng_live_trace *trace = | |
124 | g_ptr_array_index(session->traces, trace_idx); | |
7cdc2bab | 125 | if (trace->id == trace_id) { |
14f28187 FD |
126 | ret_trace = trace; |
127 | goto end; | |
7cdc2bab MD |
128 | } |
129 | } | |
14f28187 FD |
130 | |
131 | end: | |
132 | return ret_trace; | |
d3eb6e8f PP |
133 | } |
134 | ||
7cdc2bab | 135 | static |
14f28187 | 136 | void lttng_live_destroy_trace(struct lttng_live_trace *trace) |
7cdc2bab | 137 | { |
c01594de | 138 | bt_logging_level log_level = trace->log_level; |
2ece7dd0 | 139 | bt_self_component *self_comp = trace->self_comp; |
c01594de | 140 | |
ecb4ba8a | 141 | BT_COMP_LOGD("Destroying live trace: trace-id=%"PRIu64, trace->id); |
7cdc2bab | 142 | |
14f28187 FD |
143 | BT_ASSERT(trace->stream_iterators); |
144 | g_ptr_array_free(trace->stream_iterators, TRUE); | |
5bd230f4 | 145 | |
14f28187 FD |
146 | BT_TRACE_PUT_REF_AND_RESET(trace->trace); |
147 | BT_TRACE_CLASS_PUT_REF_AND_RESET(trace->trace_class); | |
5bd230f4 | 148 | |
7cdc2bab | 149 | lttng_live_metadata_fini(trace); |
7cdc2bab MD |
150 | g_free(trace); |
151 | } | |
152 | ||
153 | static | |
154 | struct lttng_live_trace *lttng_live_create_trace(struct lttng_live_session *session, | |
155 | uint64_t trace_id) | |
156 | { | |
157 | struct lttng_live_trace *trace = NULL; | |
c01594de | 158 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 159 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab | 160 | |
ecb4ba8a FD |
161 | BT_COMP_LOGD("Creating live trace: " |
162 | "session-id=%"PRIu64", trace-id=%"PRIu64, | |
163 | session->id, trace_id); | |
7cdc2bab MD |
164 | trace = g_new0(struct lttng_live_trace, 1); |
165 | if (!trace) { | |
1419db2b FD |
166 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
167 | "Failed to allocate live trace"); | |
7cdc2bab MD |
168 | goto error; |
169 | } | |
c01594de | 170 | trace->log_level = session->log_level; |
2ece7dd0 | 171 | trace->self_comp = session->self_comp; |
7cdc2bab MD |
172 | trace->session = session; |
173 | trace->id = trace_id; | |
14f28187 FD |
174 | trace->trace_class = NULL; |
175 | trace->trace = NULL; | |
176 | trace->stream_iterators = g_ptr_array_new_with_free_func( | |
0f1979c3 | 177 | (GDestroyNotify) lttng_live_stream_iterator_destroy); |
14f28187 | 178 | BT_ASSERT(trace->stream_iterators); |
76bbaebc | 179 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; |
14f28187 FD |
180 | g_ptr_array_add(session->traces, trace); |
181 | ||
7cdc2bab MD |
182 | goto end; |
183 | error: | |
184 | g_free(trace); | |
185 | trace = NULL; | |
186 | end: | |
187 | return trace; | |
188 | } | |
189 | ||
190 | BT_HIDDEN | |
36e94ad6 | 191 | struct lttng_live_trace *lttng_live_session_borrow_or_create_trace_by_id( |
14f28187 | 192 | struct lttng_live_session *session, uint64_t trace_id) |
7cdc2bab MD |
193 | { |
194 | struct lttng_live_trace *trace; | |
195 | ||
36e94ad6 | 196 | trace = lttng_live_session_borrow_trace_by_id(session, trace_id); |
7cdc2bab | 197 | if (trace) { |
14f28187 | 198 | goto end; |
7cdc2bab | 199 | } |
7cdc2bab | 200 | |
14f28187 FD |
201 | /* The session is the owner of the newly created trace. */ |
202 | trace = lttng_live_create_trace(session, trace_id); | |
7cdc2bab | 203 | |
14f28187 FD |
204 | end: |
205 | return trace; | |
7cdc2bab MD |
206 | } |
207 | ||
208 | BT_HIDDEN | |
14f28187 | 209 | int lttng_live_add_session(struct lttng_live_msg_iter *lttng_live_msg_iter, |
06994c71 MD |
210 | uint64_t session_id, const char *hostname, |
211 | const char *session_name) | |
7cdc2bab MD |
212 | { |
213 | int ret = 0; | |
14f28187 | 214 | struct lttng_live_session *session; |
c01594de | 215 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 216 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
7cdc2bab | 217 | |
ecb4ba8a FD |
218 | BT_COMP_LOGD("Adding live session: " |
219 | "session-id=%" PRIu64 ", hostname=\"%s\" session-name=\"%s\"", | |
220 | session_id, hostname, session_name); | |
221 | ||
14f28187 FD |
222 | session = g_new0(struct lttng_live_session, 1); |
223 | if (!session) { | |
1419db2b FD |
224 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
225 | "Failed to allocate live session"); | |
7cdc2bab MD |
226 | goto error; |
227 | } | |
228 | ||
c01594de | 229 | session->log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 230 | session->self_comp = lttng_live_msg_iter->self_comp; |
14f28187 FD |
231 | session->id = session_id; |
232 | session->traces = g_ptr_array_new_with_free_func( | |
0f1979c3 | 233 | (GDestroyNotify) lttng_live_destroy_trace); |
14f28187 FD |
234 | BT_ASSERT(session->traces); |
235 | session->lttng_live_msg_iter = lttng_live_msg_iter; | |
236 | session->new_streams_needed = true; | |
237 | session->hostname = g_string_new(hostname); | |
238 | BT_ASSERT(session->hostname); | |
239 | ||
240 | session->session_name = g_string_new(session_name); | |
241 | BT_ASSERT(session->session_name); | |
7cdc2bab | 242 | |
14f28187 | 243 | g_ptr_array_add(lttng_live_msg_iter->sessions, session); |
7cdc2bab MD |
244 | goto end; |
245 | error: | |
14f28187 | 246 | g_free(session); |
7cdc2bab MD |
247 | ret = -1; |
248 | end: | |
249 | return ret; | |
250 | } | |
251 | ||
252 | static | |
253 | void lttng_live_destroy_session(struct lttng_live_session *session) | |
254 | { | |
c01594de | 255 | bt_logging_level log_level; |
2ece7dd0 | 256 | bt_self_component *self_comp; |
14f28187 FD |
257 | |
258 | if (!session) { | |
259 | goto end; | |
260 | } | |
7cdc2bab | 261 | |
c01594de | 262 | log_level = session->log_level; |
2ece7dd0 | 263 | self_comp = session->self_comp; |
ecb4ba8a FD |
264 | BT_COMP_LOGD("Destroying live session: " |
265 | "session-id=%"PRIu64", session-name=\"%s\"", | |
266 | session->id, session->session_name->str); | |
7cdc2bab | 267 | if (session->id != -1ULL) { |
36e94ad6 | 268 | if (lttng_live_session_detach(session)) { |
0757916e FD |
269 | if (!lttng_live_graph_is_canceled( |
270 | session->lttng_live_msg_iter)) { | |
4c66436f | 271 | /* Old relayd cannot detach sessions. */ |
2ece7dd0 | 272 | BT_COMP_LOGD("Unable to detach lttng live session %" PRIu64, |
4c66436f MD |
273 | session->id); |
274 | } | |
7cdc2bab MD |
275 | } |
276 | session->id = -1ULL; | |
277 | } | |
14f28187 FD |
278 | |
279 | if (session->traces) { | |
280 | g_ptr_array_free(session->traces, TRUE); | |
7cdc2bab | 281 | } |
14f28187 | 282 | |
06994c71 MD |
283 | if (session->hostname) { |
284 | g_string_free(session->hostname, TRUE); | |
285 | } | |
286 | if (session->session_name) { | |
287 | g_string_free(session->session_name, TRUE); | |
288 | } | |
7cdc2bab | 289 | g_free(session); |
14f28187 FD |
290 | |
291 | end: | |
292 | return; | |
7cdc2bab MD |
293 | } |
294 | ||
14f28187 FD |
295 | static |
296 | void lttng_live_msg_iter_destroy(struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 297 | { |
14f28187 FD |
298 | if (!lttng_live_msg_iter) { |
299 | goto end; | |
7cdc2bab | 300 | } |
7cdc2bab | 301 | |
14f28187 FD |
302 | if (lttng_live_msg_iter->sessions) { |
303 | g_ptr_array_free(lttng_live_msg_iter->sessions, TRUE); | |
7cdc2bab | 304 | } |
14f28187 | 305 | |
b9e6ec43 FD |
306 | if (lttng_live_msg_iter->viewer_connection) { |
307 | live_viewer_connection_destroy(lttng_live_msg_iter->viewer_connection); | |
308 | } | |
14f28187 FD |
309 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp); |
310 | BT_ASSERT(lttng_live_msg_iter->lttng_live_comp->has_msg_iter); | |
311 | ||
312 | /* All stream iterators must be destroyed at this point. */ | |
313 | BT_ASSERT(lttng_live_msg_iter->active_stream_iter == 0); | |
314 | lttng_live_msg_iter->lttng_live_comp->has_msg_iter = false; | |
315 | ||
316 | g_free(lttng_live_msg_iter); | |
317 | ||
318 | end: | |
319 | return; | |
320 | } | |
321 | ||
322 | BT_HIDDEN | |
323 | void lttng_live_msg_iter_finalize(bt_self_message_iterator *self_msg_iter) | |
324 | { | |
325 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
326 | ||
327 | BT_ASSERT(self_msg_iter); | |
328 | ||
329 | lttng_live_msg_iter = bt_self_message_iterator_get_data(self_msg_iter); | |
330 | BT_ASSERT(lttng_live_msg_iter); | |
331 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); | |
7cdc2bab MD |
332 | } |
333 | ||
334 | static | |
14f28187 | 335 | enum lttng_live_iterator_status lttng_live_iterator_next_check_stream_state( |
7cdc2bab MD |
336 | struct lttng_live_stream_iterator *lttng_live_stream) |
337 | { | |
c01594de | 338 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 339 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
c01594de | 340 | |
7cdc2bab MD |
341 | switch (lttng_live_stream->state) { |
342 | case LTTNG_LIVE_STREAM_QUIESCENT: | |
343 | case LTTNG_LIVE_STREAM_ACTIVE_DATA: | |
344 | break; | |
345 | case LTTNG_LIVE_STREAM_ACTIVE_NO_DATA: | |
346 | /* Invalid state. */ | |
2ece7dd0 | 347 | BT_COMP_LOGF("Unexpected stream state \"ACTIVE_NO_DATA\""); |
498e7994 | 348 | bt_common_abort(); |
7cdc2bab MD |
349 | case LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA: |
350 | /* Invalid state. */ | |
2ece7dd0 | 351 | BT_COMP_LOGF("Unexpected stream state \"QUIESCENT_NO_DATA\""); |
498e7994 | 352 | bt_common_abort(); |
7cdc2bab MD |
353 | case LTTNG_LIVE_STREAM_EOF: |
354 | break; | |
355 | } | |
14f28187 | 356 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
357 | } |
358 | ||
359 | /* | |
f93afbf9 FD |
360 | * For active no data stream, fetch next index. As a result of that it can |
361 | * become either: | |
362 | * - quiescent: won't have events for a bit, | |
363 | * - have data: need to get that data and produce the event, | |
364 | * - have no data on this stream at this point: need to retry (AGAIN) or return | |
365 | * EOF. | |
7cdc2bab MD |
366 | */ |
367 | static | |
14f28187 FD |
368 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_no_data_stream( |
369 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
370 | struct lttng_live_stream_iterator *lttng_live_stream) |
371 | { | |
c01594de | 372 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 373 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
0f1979c3 | 374 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 375 | enum lttng_live_stream_state orig_state = lttng_live_stream->state; |
0f1979c3 | 376 | struct packet_index index; |
7cdc2bab | 377 | |
76bbaebc FD |
378 | if (lttng_live_stream->trace->metadata_stream_state == |
379 | LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) { | |
f93afbf9 FD |
380 | BT_COMP_LOGD("Need to get an update for the metadata stream before proceeding further with this stream: " |
381 | "stream-name=\"%s\"", lttng_live_stream->name->str); | |
14f28187 | 382 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
383 | goto end; |
384 | } | |
f93afbf9 | 385 | |
7cdc2bab | 386 | if (lttng_live_stream->trace->session->new_streams_needed) { |
f93afbf9 FD |
387 | BT_COMP_LOGD("Need to get an update of all streams before proceeding further with this stream: " |
388 | "stream-name=\"%s\"", lttng_live_stream->name->str); | |
14f28187 | 389 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
390 | goto end; |
391 | } | |
f93afbf9 | 392 | |
14f28187 FD |
393 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_NO_DATA && |
394 | lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA) { | |
7cdc2bab MD |
395 | goto end; |
396 | } | |
14f28187 | 397 | ret = lttng_live_get_next_index(lttng_live_msg_iter, lttng_live_stream, |
f93afbf9 | 398 | &index); |
14f28187 | 399 | if (ret != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
400 | goto end; |
401 | } | |
f93afbf9 | 402 | |
98b15851 | 403 | BT_ASSERT_DBG(lttng_live_stream->state != LTTNG_LIVE_STREAM_EOF); |
f93afbf9 | 404 | |
7cdc2bab | 405 | if (lttng_live_stream->state == LTTNG_LIVE_STREAM_QUIESCENT) { |
14f28187 FD |
406 | uint64_t last_inact_ts = lttng_live_stream->last_inactivity_ts, |
407 | curr_inact_ts = lttng_live_stream->current_inactivity_ts; | |
408 | ||
409 | if (orig_state == LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA && | |
410 | last_inact_ts == curr_inact_ts) { | |
411 | ret = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
ecb4ba8a | 412 | LTTNG_LIVE_LOGD_STREAM_ITER(lttng_live_stream); |
7cdc2bab | 413 | } else { |
14f28187 | 414 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab MD |
415 | } |
416 | goto end; | |
417 | } | |
f93afbf9 | 418 | |
7cdc2bab MD |
419 | lttng_live_stream->base_offset = index.offset; |
420 | lttng_live_stream->offset = index.offset; | |
421 | lttng_live_stream->len = index.packet_size / CHAR_BIT; | |
f93afbf9 FD |
422 | |
423 | BT_COMP_LOGD("Setting live stream reading info: stream-name=\"%s\", " | |
424 | "viewer-stream-id=%" PRIu64 ", stream-base-offset=%" PRIu64 | |
425 | ", stream-offset=%" PRIu64 ", stream-len=%" PRIu64, | |
426 | lttng_live_stream->name->str, | |
427 | lttng_live_stream->viewer_stream_id, | |
428 | lttng_live_stream->base_offset, | |
429 | lttng_live_stream->offset, lttng_live_stream->len); | |
430 | ||
7cdc2bab | 431 | end: |
14f28187 FD |
432 | if (ret == LTTNG_LIVE_ITERATOR_STATUS_OK) { |
433 | ret = lttng_live_iterator_next_check_stream_state(lttng_live_stream); | |
7cdc2bab MD |
434 | } |
435 | return ret; | |
436 | } | |
437 | ||
438 | /* | |
14f28187 FD |
439 | * Creation of the message requires the ctf trace class to be created |
440 | * beforehand, but the live protocol gives us all streams (including metadata) | |
441 | * at once. So we split it in three steps: getting streams, getting metadata | |
442 | * (which creates the ctf trace class), and then creating the per-stream | |
443 | * messages. | |
7cdc2bab MD |
444 | */ |
445 | static | |
14f28187 FD |
446 | enum lttng_live_iterator_status lttng_live_get_session( |
447 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab MD |
448 | struct lttng_live_session *session) |
449 | { | |
1419db2b FD |
450 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
451 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
452 | enum lttng_live_iterator_status status; |
453 | uint64_t trace_idx; | |
7cdc2bab | 454 | |
14f28187 | 455 | if (!session->attached) { |
f93afbf9 FD |
456 | BT_COMP_LOGD("Attach to session: session-id=%" PRIu64, |
457 | session->id); | |
f79c2d7a | 458 | enum lttng_live_viewer_status attach_status = |
36e94ad6 | 459 | lttng_live_session_attach(session, |
851de941 | 460 | lttng_live_msg_iter->self_msg_iter); |
f79c2d7a | 461 | if (attach_status != LTTNG_LIVE_VIEWER_STATUS_OK) { |
0757916e | 462 | if (lttng_live_graph_is_canceled(lttng_live_msg_iter)) { |
1419db2b FD |
463 | /* |
464 | * Clear any causes appended in | |
465 | * `lttng_live_attach_session()` as we want to | |
466 | * return gracefully since the graph was | |
467 | * cancelled. | |
468 | */ | |
469 | bt_current_thread_clear_error(); | |
14f28187 FD |
470 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
471 | } else { | |
472 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1419db2b FD |
473 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
474 | "Error attaching to LTTng live session"); | |
14f28187 FD |
475 | } |
476 | goto end; | |
4c66436f | 477 | } |
7cdc2bab | 478 | } |
14f28187 | 479 | |
f93afbf9 FD |
480 | BT_COMP_LOGD("Updating all streams and metadata for session: " |
481 | "session-id=%" PRIu64 ", session-name=\"%s\"", | |
482 | session->id, session->session_name->str); | |
483 | ||
36e94ad6 | 484 | status = lttng_live_session_get_new_streams(session, |
851de941 | 485 | lttng_live_msg_iter->self_msg_iter); |
14f28187 FD |
486 | if (status != LTTNG_LIVE_ITERATOR_STATUS_OK && |
487 | status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
488 | goto end; | |
7cdc2bab | 489 | } |
f93afbf9 | 490 | |
c28512ab FD |
491 | trace_idx = 0; |
492 | while (trace_idx < session->traces->len) { | |
14f28187 FD |
493 | struct lttng_live_trace *trace = |
494 | g_ptr_array_index(session->traces, trace_idx); | |
495 | ||
7cdc2bab | 496 | status = lttng_live_metadata_update(trace); |
c28512ab | 497 | switch (status) { |
0ca5c4f9 | 498 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
c28512ab FD |
499 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
500 | trace_idx++; | |
501 | break; | |
0ca5c4f9 FD |
502 | case LTTNG_LIVE_ITERATOR_STATUS_CONTINUE: |
503 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
504 | goto end; | |
c28512ab | 505 | default: |
ecb4ba8a FD |
506 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
507 | "Error updating trace metadata: " | |
508 | "stream-iter-status=%s, trace-id=%"PRIu64, | |
509 | lttng_live_iterator_status_string(status), | |
510 | trace->id); | |
14f28187 | 511 | goto end; |
7cdc2bab MD |
512 | } |
513 | } | |
f93afbf9 FD |
514 | |
515 | /* | |
516 | * Now that we have the metadata we can initialize the downstream | |
517 | * iterator. | |
518 | */ | |
851de941 SM |
519 | status = lttng_live_lazy_msg_init(session, |
520 | lttng_live_msg_iter->self_msg_iter); | |
14f28187 FD |
521 | |
522 | end: | |
523 | return status; | |
7cdc2bab MD |
524 | } |
525 | ||
7cdc2bab | 526 | static |
14f28187 | 527 | void lttng_live_force_new_streams_and_metadata(struct lttng_live_msg_iter *lttng_live_msg_iter) |
7cdc2bab | 528 | { |
14f28187 | 529 | uint64_t session_idx, trace_idx; |
f93afbf9 FD |
530 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
531 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
7cdc2bab | 532 | |
14f28187 FD |
533 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
534 | session_idx++) { | |
535 | struct lttng_live_session *session = | |
536 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
f93afbf9 FD |
537 | BT_COMP_LOGD("Force marking session as needing new streams: " |
538 | "session-id=%" PRIu64, session->id); | |
7cdc2bab | 539 | session->new_streams_needed = true; |
14f28187 FD |
540 | for (trace_idx = 0; trace_idx < session->traces->len; |
541 | trace_idx++) { | |
542 | struct lttng_live_trace *trace = | |
543 | g_ptr_array_index(session->traces, trace_idx); | |
f93afbf9 FD |
544 | BT_COMP_LOGD("Force marking trace metadata state as needing an update: " |
545 | "session-id=%" PRIu64 ", trace-id=%" PRIu64, | |
546 | session->id, trace->id); | |
76bbaebc FD |
547 | |
548 | BT_ASSERT(trace->metadata_stream_state != | |
549 | LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED); | |
550 | ||
551 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED; | |
7cdc2bab MD |
552 | } |
553 | } | |
554 | } | |
555 | ||
556 | static | |
14f28187 FD |
557 | enum lttng_live_iterator_status |
558 | lttng_live_iterator_handle_new_streams_and_metadata( | |
559 | struct lttng_live_msg_iter *lttng_live_msg_iter) | |
7cdc2bab | 560 | { |
f79c2d7a FD |
561 | enum lttng_live_iterator_status status; |
562 | enum lttng_live_viewer_status viewer_status; | |
1419db2b FD |
563 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
564 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 FD |
565 | uint64_t session_idx = 0, nr_sessions_opened = 0; |
566 | struct lttng_live_session *session; | |
567 | enum session_not_found_action sess_not_found_act = | |
568 | lttng_live_msg_iter->lttng_live_comp->params.sess_not_found_act; | |
569 | ||
883ffb2f | 570 | BT_COMP_LOGD("Update data and metadata of all sessions: " |
ecb4ba8a | 571 | "live-msg-iter-addr=%p", lttng_live_msg_iter); |
7cdc2bab | 572 | /* |
14f28187 | 573 | * In a remotely distant future, we could add a "new |
7cdc2bab MD |
574 | * session" flag to the protocol, which would tell us that we |
575 | * need to query for new sessions even though we have sessions | |
576 | * currently ongoing. | |
577 | */ | |
14f28187 FD |
578 | if (lttng_live_msg_iter->sessions->len == 0) { |
579 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
ecb4ba8a | 580 | BT_COMP_LOGD("No session found. Exiting in accordance with the `session-not-found-action` parameter"); |
f79c2d7a | 581 | status = LTTNG_LIVE_ITERATOR_STATUS_END; |
14f28187 FD |
582 | goto end; |
583 | } else { | |
ecb4ba8a | 584 | BT_COMP_LOGD("No session found. Try creating a new one in accordance with the `session-not-found-action` parameter"); |
14f28187 FD |
585 | /* |
586 | * Retry to create a viewer session for the requested | |
587 | * session name. | |
588 | */ | |
f79c2d7a FD |
589 | viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter); |
590 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
591 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
592 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
593 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
594 | "Error creating LTTng live viewer session"); | |
595 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
596 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
597 | } else { | |
598 | bt_common_abort(); | |
599 | } | |
14f28187 FD |
600 | goto end; |
601 | } | |
602 | } | |
7cdc2bab | 603 | } |
14f28187 FD |
604 | |
605 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; | |
606 | session_idx++) { | |
607 | session = g_ptr_array_index(lttng_live_msg_iter->sessions, | |
608 | session_idx); | |
f79c2d7a FD |
609 | status = lttng_live_get_session(lttng_live_msg_iter, session); |
610 | switch (status) { | |
14f28187 | 611 | case LTTNG_LIVE_ITERATOR_STATUS_OK: |
7cdc2bab | 612 | break; |
14f28187 | 613 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
f79c2d7a | 614 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
615 | break; |
616 | default: | |
617 | goto end; | |
618 | } | |
619 | if (!session->closed) { | |
620 | nr_sessions_opened++; | |
621 | } | |
622 | } | |
f79c2d7a FD |
623 | |
624 | if (sess_not_found_act != SESSION_NOT_FOUND_ACTION_CONTINUE && | |
14f28187 | 625 | nr_sessions_opened == 0) { |
f79c2d7a FD |
626 | status = LTTNG_LIVE_ITERATOR_STATUS_END; |
627 | } else { | |
628 | status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab | 629 | } |
f79c2d7a FD |
630 | |
631 | end: | |
632 | return status; | |
7cdc2bab MD |
633 | } |
634 | ||
635 | static | |
14f28187 FD |
636 | enum lttng_live_iterator_status emit_inactivity_message( |
637 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
638 | struct lttng_live_stream_iterator *stream_iter, | |
cad707e2 | 639 | const bt_message **message, uint64_t timestamp) |
7cdc2bab | 640 | { |
0f1979c3 | 641 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1419db2b FD |
642 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
643 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 644 | bt_message *msg = NULL; |
7cdc2bab | 645 | |
14f28187 FD |
646 | BT_ASSERT(stream_iter->trace->clock_class); |
647 | ||
f93afbf9 FD |
648 | BT_COMP_LOGD("Emitting inactivity message for stream: ctf-stream-id=%" PRIu64 |
649 | ", viewer-stream-id=%" PRIu64 ", timestamp=%" PRIu64, | |
650 | stream_iter->ctf_stream_class_id, | |
651 | stream_iter->viewer_stream_id, timestamp); | |
652 | ||
14f28187 | 653 | msg = bt_message_message_iterator_inactivity_create( |
0f1979c3 FD |
654 | lttng_live_msg_iter->self_msg_iter, |
655 | stream_iter->trace->clock_class, timestamp); | |
d6e69534 | 656 | if (!msg) { |
1419db2b FD |
657 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
658 | "Error emitting message iterator inactivity message"); | |
7cdc2bab MD |
659 | goto error; |
660 | } | |
14f28187 | 661 | |
d6e69534 | 662 | *message = msg; |
7cdc2bab | 663 | end: |
7cdc2bab MD |
664 | return ret; |
665 | ||
666 | error: | |
14f28187 | 667 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
d6e69534 | 668 | bt_message_put_ref(msg); |
7cdc2bab MD |
669 | goto end; |
670 | } | |
671 | ||
672 | static | |
14f28187 FD |
673 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_quiescent_stream( |
674 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 675 | struct lttng_live_stream_iterator *lttng_live_stream, |
cad707e2 | 676 | const bt_message **message) |
7cdc2bab | 677 | { |
0f1979c3 | 678 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
679 | |
680 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_QUIESCENT) { | |
14f28187 | 681 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
682 | } |
683 | ||
f93afbf9 FD |
684 | /* |
685 | * Check if we already sent an inactivty message downstream for this | |
686 | * `current_inactivity_ts` value. | |
687 | */ | |
14f28187 FD |
688 | if (lttng_live_stream->current_inactivity_ts == |
689 | lttng_live_stream->last_inactivity_ts) { | |
7cdc2bab | 690 | lttng_live_stream->state = LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA; |
14f28187 FD |
691 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
692 | goto end; | |
693 | } | |
694 | ||
695 | ret = emit_inactivity_message(lttng_live_msg_iter, lttng_live_stream, | |
0f1979c3 | 696 | message, lttng_live_stream->current_inactivity_ts); |
14f28187 FD |
697 | |
698 | lttng_live_stream->last_inactivity_ts = | |
0f1979c3 | 699 | lttng_live_stream->current_inactivity_ts; |
14f28187 FD |
700 | end: |
701 | return ret; | |
702 | } | |
703 | ||
704 | static | |
705 | int live_get_msg_ts_ns(struct lttng_live_stream_iterator *stream_iter, | |
706 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
707 | const bt_message *msg, int64_t last_msg_ts_ns, | |
708 | int64_t *ts_ns) | |
709 | { | |
710 | const bt_clock_class *clock_class = NULL; | |
711 | const bt_clock_snapshot *clock_snapshot = NULL; | |
712 | int ret = 0; | |
c01594de | 713 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 714 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 715 | |
98b15851 PP |
716 | BT_ASSERT_DBG(msg); |
717 | BT_ASSERT_DBG(ts_ns); | |
14f28187 | 718 | |
2ece7dd0 | 719 | BT_COMP_LOGD("Getting message's timestamp: iter-data-addr=%p, msg-addr=%p, " |
14f28187 FD |
720 | "last-msg-ts=%" PRId64, lttng_live_msg_iter, msg, |
721 | last_msg_ts_ns); | |
722 | ||
723 | switch (bt_message_get_type(msg)) { | |
724 | case BT_MESSAGE_TYPE_EVENT: | |
0f1979c3 | 725 | clock_class = bt_message_event_borrow_stream_class_default_clock_class_const( |
14f28187 | 726 | msg); |
98b15851 | 727 | BT_ASSERT_DBG(clock_class); |
14f28187 | 728 | |
0cbc2c33 PP |
729 | clock_snapshot = bt_message_event_borrow_default_clock_snapshot_const( |
730 | msg); | |
14f28187 FD |
731 | break; |
732 | case BT_MESSAGE_TYPE_PACKET_BEGINNING: | |
0f1979c3 | 733 | clock_class = bt_message_packet_beginning_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
734 | msg); |
735 | BT_ASSERT(clock_class); | |
736 | ||
0cbc2c33 PP |
737 | clock_snapshot = bt_message_packet_beginning_borrow_default_clock_snapshot_const( |
738 | msg); | |
14f28187 FD |
739 | break; |
740 | case BT_MESSAGE_TYPE_PACKET_END: | |
0f1979c3 | 741 | clock_class = bt_message_packet_end_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
742 | msg); |
743 | BT_ASSERT(clock_class); | |
744 | ||
0cbc2c33 PP |
745 | clock_snapshot = bt_message_packet_end_borrow_default_clock_snapshot_const( |
746 | msg); | |
14f28187 FD |
747 | break; |
748 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
0f1979c3 | 749 | clock_class = bt_message_discarded_events_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
750 | msg); |
751 | BT_ASSERT(clock_class); | |
752 | ||
9b24b6aa | 753 | clock_snapshot = bt_message_discarded_events_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 754 | msg); |
14f28187 FD |
755 | break; |
756 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
0f1979c3 | 757 | clock_class = bt_message_discarded_packets_borrow_stream_class_default_clock_class_const( |
14f28187 FD |
758 | msg); |
759 | BT_ASSERT(clock_class); | |
760 | ||
9b24b6aa | 761 | clock_snapshot = bt_message_discarded_packets_borrow_beginning_default_clock_snapshot_const( |
0cbc2c33 | 762 | msg); |
14f28187 | 763 | break; |
14f28187 | 764 | case BT_MESSAGE_TYPE_MESSAGE_ITERATOR_INACTIVITY: |
60d02328 | 765 | clock_snapshot = bt_message_message_iterator_inactivity_borrow_clock_snapshot_const( |
0f1979c3 | 766 | msg); |
14f28187 FD |
767 | break; |
768 | default: | |
769 | /* All the other messages have a higher priority */ | |
2ece7dd0 | 770 | BT_COMP_LOGD_STR("Message has no timestamp: using the last message timestamp."); |
14f28187 | 771 | *ts_ns = last_msg_ts_ns; |
7cdc2bab MD |
772 | goto end; |
773 | } | |
774 | ||
14f28187 | 775 | clock_class = bt_clock_snapshot_borrow_clock_class_const(clock_snapshot); |
98b15851 | 776 | BT_ASSERT_DBG(clock_class); |
14f28187 FD |
777 | |
778 | ret = bt_clock_snapshot_get_ns_from_origin(clock_snapshot, ts_ns); | |
779 | if (ret) { | |
1419db2b FD |
780 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
781 | "Cannot get nanoseconds from Epoch of clock snapshot: " | |
14f28187 FD |
782 | "clock-snapshot-addr=%p", clock_snapshot); |
783 | goto error; | |
784 | } | |
785 | ||
786 | goto end; | |
787 | ||
14f28187 FD |
788 | error: |
789 | ret = -1; | |
7cdc2bab | 790 | |
7cdc2bab | 791 | end: |
14f28187 | 792 | if (ret == 0) { |
2ece7dd0 | 793 | BT_COMP_LOGD("Found message's timestamp: " |
14f28187 FD |
794 | "iter-data-addr=%p, msg-addr=%p, " |
795 | "last-msg-ts=%" PRId64 ", ts=%" PRId64, | |
796 | lttng_live_msg_iter, msg, last_msg_ts_ns, *ts_ns); | |
797 | } | |
798 | ||
7cdc2bab MD |
799 | return ret; |
800 | } | |
801 | ||
802 | static | |
14f28187 FD |
803 | enum lttng_live_iterator_status lttng_live_iterator_next_handle_one_active_data_stream( |
804 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
7cdc2bab | 805 | struct lttng_live_stream_iterator *lttng_live_stream, |
cad707e2 | 806 | const bt_message **message) |
7cdc2bab | 807 | { |
14f28187 | 808 | enum lttng_live_iterator_status ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
c01594de | 809 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 810 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
18a1979b | 811 | enum ctf_msg_iter_status status; |
0f1979c3 | 812 | uint64_t session_idx, trace_idx; |
7cdc2bab | 813 | |
14f28187 FD |
814 | for (session_idx = 0; session_idx < lttng_live_msg_iter->sessions->len; |
815 | session_idx++) { | |
816 | struct lttng_live_session *session = | |
817 | g_ptr_array_index(lttng_live_msg_iter->sessions, session_idx); | |
7cdc2bab MD |
818 | |
819 | if (session->new_streams_needed) { | |
f93afbf9 FD |
820 | BT_COMP_LOGD("Need an update for streams: " |
821 | "session-id=%" PRIu64, session->id); | |
14f28187 FD |
822 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
823 | goto end; | |
7cdc2bab | 824 | } |
14f28187 FD |
825 | for (trace_idx = 0; trace_idx < session->traces->len; |
826 | trace_idx++) { | |
827 | struct lttng_live_trace *trace = | |
828 | g_ptr_array_index(session->traces, trace_idx); | |
76bbaebc | 829 | if (trace->metadata_stream_state == LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) { |
f93afbf9 FD |
830 | BT_COMP_LOGD("Need an update for metadata stream: " |
831 | "session-id=%" PRIu64 ", trace-id=%" PRIu64, | |
832 | session->id, trace->id); | |
14f28187 FD |
833 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
834 | goto end; | |
7cdc2bab MD |
835 | } |
836 | } | |
837 | } | |
838 | ||
839 | if (lttng_live_stream->state != LTTNG_LIVE_STREAM_ACTIVE_DATA) { | |
14f28187 | 840 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
ecb4ba8a FD |
841 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
842 | "Invalid state of live stream iterator" | |
843 | "stream-iter-status=%s", | |
844 | lttng_live_stream_state_string(lttng_live_stream->state)); | |
14f28187 | 845 | goto end; |
7cdc2bab | 846 | } |
14f28187 | 847 | |
851de941 SM |
848 | status = ctf_msg_iter_get_next_message( |
849 | lttng_live_stream->msg_iter, message); | |
7cdc2bab | 850 | switch (status) { |
18a1979b | 851 | case CTF_MSG_ITER_STATUS_EOF: |
14f28187 | 852 | ret = LTTNG_LIVE_ITERATOR_STATUS_END; |
7cdc2bab | 853 | break; |
18a1979b | 854 | case CTF_MSG_ITER_STATUS_OK: |
14f28187 | 855 | ret = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 856 | break; |
18a1979b | 857 | case CTF_MSG_ITER_STATUS_AGAIN: |
7cdc2bab MD |
858 | /* |
859 | * Continue immediately (end of packet). The next | |
860 | * get_index may return AGAIN to delay the following | |
861 | * attempt. | |
862 | */ | |
14f28187 | 863 | ret = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; |
7cdc2bab | 864 | break; |
18a1979b | 865 | case CTF_MSG_ITER_STATUS_ERROR: |
7cdc2bab | 866 | default: |
14f28187 | 867 | ret = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
1419db2b | 868 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
ecb4ba8a FD |
869 | "CTF message iterator failed to get next message: " |
870 | "msg-iter=%p, msg-iter-status=%s", | |
871 | lttng_live_stream->msg_iter, | |
872 | ctf_msg_iter_status_string(status)); | |
7cdc2bab MD |
873 | break; |
874 | } | |
14f28187 FD |
875 | |
876 | end: | |
7cdc2bab MD |
877 | return ret; |
878 | } | |
879 | ||
4a39caef FD |
880 | static |
881 | enum lttng_live_iterator_status lttng_live_iterator_close_stream( | |
882 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
883 | struct lttng_live_stream_iterator *stream_iter, | |
cad707e2 | 884 | const bt_message **curr_msg) |
4a39caef FD |
885 | { |
886 | enum lttng_live_iterator_status live_status = | |
887 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1419db2b FD |
888 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
889 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
f93afbf9 FD |
890 | |
891 | BT_COMP_LOGD("Closing live stream iterator: stream-name=\"%s\", " | |
892 | "viewer-stream-id=%" PRIu64, stream_iter->name->str, | |
893 | stream_iter->viewer_stream_id); | |
894 | ||
4a39caef FD |
895 | /* |
896 | * The viewer has hung up on us so we are closing the stream. The | |
18a1979b | 897 | * `ctf_msg_iter` should simply realize that it needs to close the |
4a39caef FD |
898 | * stream properly by emitting the necessary stream end message. |
899 | */ | |
18a1979b | 900 | enum ctf_msg_iter_status status = ctf_msg_iter_get_next_message( |
851de941 | 901 | stream_iter->msg_iter, curr_msg); |
4a39caef | 902 | |
18a1979b | 903 | if (status == CTF_MSG_ITER_STATUS_ERROR) { |
1419db2b FD |
904 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
905 | "Error getting the next message from CTF message iterator"); | |
4a39caef FD |
906 | live_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
907 | goto end; | |
1cda4ff4 FD |
908 | } else if (status == CTF_MSG_ITER_STATUS_EOF) { |
909 | BT_COMP_LOGI("Reached the end of the live stream iterator."); | |
910 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
911 | goto end; | |
4a39caef FD |
912 | } |
913 | ||
18a1979b | 914 | BT_ASSERT(status == CTF_MSG_ITER_STATUS_OK); |
4a39caef FD |
915 | |
916 | end: | |
917 | return live_status; | |
918 | } | |
919 | ||
7cdc2bab MD |
920 | /* |
921 | * helper function: | |
922 | * handle_no_data_streams() | |
923 | * retry: | |
924 | * - for each ACTIVE_NO_DATA stream: | |
925 | * - query relayd for stream data, or quiescence info. | |
926 | * - if need metadata, get metadata, goto retry. | |
927 | * - if new stream, get new stream as ACTIVE_NO_DATA, goto retry | |
928 | * - if quiescent, move to QUIESCENT streams | |
929 | * - if fetched data, move to ACTIVE_DATA streams | |
930 | * (at this point each stream either has data, or is quiescent) | |
931 | * | |
932 | * | |
933 | * iterator_next: | |
934 | * handle_new_streams_and_metadata() | |
935 | * - query relayd for known streams, add them as ACTIVE_NO_DATA | |
936 | * - query relayd for metadata | |
937 | * | |
938 | * call handle_active_no_data_streams() | |
939 | * | |
940 | * handle_quiescent_streams() | |
941 | * - if at least one stream is ACTIVE_DATA: | |
942 | * - peek stream event with lowest timestamp -> next_ts | |
943 | * - for each quiescent stream | |
944 | * - if next_ts >= quiescent end | |
945 | * - set state to ACTIVE_NO_DATA | |
946 | * - else | |
947 | * - for each quiescent stream | |
948 | * - set state to ACTIVE_NO_DATA | |
949 | * | |
950 | * call handle_active_no_data_streams() | |
951 | * | |
952 | * handle_active_data_streams() | |
953 | * - if at least one stream is ACTIVE_DATA: | |
954 | * - get stream event with lowest timestamp from heap | |
d6e69534 | 955 | * - make that stream event the current message. |
7cdc2bab MD |
956 | * - move this stream heap position to its next event |
957 | * - if we need to fetch data from relayd, move | |
958 | * stream to ACTIVE_NO_DATA. | |
959 | * - return OK | |
960 | * - return AGAIN | |
961 | * | |
962 | * end criterion: ctrl-c on client. If relayd exits or the session | |
963 | * closes on the relay daemon side, we keep on waiting for streams. | |
964 | * Eventually handle --end timestamp (also an end criterion). | |
965 | * | |
966 | * When disconnected from relayd: try to re-connect endlessly. | |
967 | */ | |
968 | static | |
a31f4d8b | 969 | enum lttng_live_iterator_status lttng_live_iterator_next_msg_on_stream( |
14f28187 FD |
970 | struct lttng_live_msg_iter *lttng_live_msg_iter, |
971 | struct lttng_live_stream_iterator *stream_iter, | |
cad707e2 | 972 | const bt_message **curr_msg) |
7cdc2bab | 973 | { |
c01594de | 974 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
2ece7dd0 | 975 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
14f28187 | 976 | enum lttng_live_iterator_status live_status; |
7cdc2bab | 977 | |
f93afbf9 FD |
978 | BT_COMP_LOGD("Advancing live stream iterator until next message if possible: " |
979 | "stream-name=\"%s\", viewer-stream-id=%" PRIu64, | |
980 | stream_iter->name->str, stream_iter->viewer_stream_id); | |
ecb4ba8a | 981 | |
4a39caef FD |
982 | if (stream_iter->has_stream_hung_up) { |
983 | /* | |
984 | * The stream has hung up and the stream was properly closed | |
985 | * during the last call to the current function. Return _END | |
986 | * status now so that this stream iterator is removed for the | |
987 | * stream iterator list. | |
988 | */ | |
989 | live_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
990 | goto end; | |
991 | } | |
992 | ||
7cdc2bab | 993 | retry: |
ecb4ba8a | 994 | LTTNG_LIVE_LOGD_STREAM_ITER(stream_iter); |
f93afbf9 FD |
995 | |
996 | /* | |
997 | * Make sure we have the most recent metadata and possibly some new | |
998 | * streams. | |
999 | */ | |
14f28187 | 1000 | live_status = lttng_live_iterator_handle_new_streams_and_metadata( |
0f1979c3 | 1001 | lttng_live_msg_iter); |
14f28187 | 1002 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
7cdc2bab MD |
1003 | goto end; |
1004 | } | |
f93afbf9 | 1005 | |
14f28187 | 1006 | live_status = lttng_live_iterator_next_handle_one_no_data_stream( |
0f1979c3 | 1007 | lttng_live_msg_iter, stream_iter); |
14f28187 | 1008 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
4a39caef FD |
1009 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1010 | /* | |
1011 | * We overwrite `live_status` since `curr_msg` is | |
1012 | * likely set to a valid message in this function. | |
1013 | */ | |
1014 | live_status = lttng_live_iterator_close_stream( | |
1015 | lttng_live_msg_iter, stream_iter, curr_msg); | |
1016 | } | |
7cdc2bab MD |
1017 | goto end; |
1018 | } | |
f93afbf9 | 1019 | |
14f28187 | 1020 | live_status = lttng_live_iterator_next_handle_one_quiescent_stream( |
0f1979c3 | 1021 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 1022 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 1023 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
1024 | goto end; |
1025 | } | |
14f28187 | 1026 | if (*curr_msg) { |
7cdc2bab MD |
1027 | goto end; |
1028 | } | |
14f28187 | 1029 | live_status = lttng_live_iterator_next_handle_one_active_data_stream( |
0f1979c3 | 1030 | lttng_live_msg_iter, stream_iter, curr_msg); |
14f28187 | 1031 | if (live_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { |
5084732e | 1032 | BT_ASSERT(!*curr_msg); |
7cdc2bab MD |
1033 | } |
1034 | ||
1035 | end: | |
14f28187 | 1036 | if (live_status == LTTNG_LIVE_ITERATOR_STATUS_CONTINUE) { |
f93afbf9 | 1037 | BT_COMP_LOGD("Ask the relay daemon for an updated view of the data and metadata streams"); |
7cdc2bab | 1038 | goto retry; |
7cdc2bab | 1039 | } |
14f28187 | 1040 | |
f93afbf9 FD |
1041 | BT_COMP_LOGD("Returning from advancing live stream iterator: status=%s" |
1042 | "stream-name=\"%s\", viewer-stream-id=%" PRIu64, | |
1043 | lttng_live_iterator_status_string(live_status), | |
1044 | stream_iter->name->str, stream_iter->viewer_stream_id); | |
1045 | ||
14f28187 | 1046 | return live_status; |
7cdc2bab MD |
1047 | } |
1048 | ||
8ec4d5ff JG |
1049 | static |
1050 | bool is_discarded_packet_or_event_message(const bt_message *msg) | |
1051 | { | |
1052 | const enum bt_message_type msg_type = bt_message_get_type(msg); | |
1053 | ||
1054 | return msg_type == BT_MESSAGE_TYPE_DISCARDED_EVENTS || | |
1055 | msg_type == BT_MESSAGE_TYPE_DISCARDED_PACKETS; | |
1056 | } | |
1057 | ||
1058 | static | |
1059 | enum lttng_live_iterator_status adjust_discarded_packets_message( | |
1060 | bt_self_message_iterator *iter, | |
1061 | const bt_stream *stream, | |
1062 | const bt_message *msg_in, bt_message **msg_out, | |
1063 | uint64_t new_begin_ts) | |
1064 | { | |
1065 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1066 | enum bt_property_availability availability; | |
1067 | const bt_clock_snapshot *clock_snapshot; | |
1068 | uint64_t end_ts; | |
1069 | uint64_t count; | |
1070 | ||
1071 | clock_snapshot = bt_message_discarded_packets_borrow_end_default_clock_snapshot_const(msg_in); | |
1072 | end_ts = bt_clock_snapshot_get_value(clock_snapshot); | |
1073 | ||
1074 | availability = bt_message_discarded_packets_get_count(msg_in, &count); | |
1075 | BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE); | |
1076 | ||
1077 | *msg_out = bt_message_discarded_packets_create_with_default_clock_snapshots( | |
1078 | iter, stream, new_begin_ts, end_ts); | |
1079 | if (!*msg_out) { | |
1080 | status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM; | |
1081 | goto end; | |
1082 | } | |
1083 | ||
1084 | bt_message_discarded_packets_set_count(*msg_out, count); | |
1085 | end: | |
1086 | return status; | |
1087 | } | |
1088 | ||
1089 | static | |
1090 | enum lttng_live_iterator_status adjust_discarded_events_message( | |
1091 | bt_self_message_iterator *iter, | |
1092 | const bt_stream *stream, | |
1093 | const bt_message *msg_in, bt_message **msg_out, | |
1094 | uint64_t new_begin_ts) | |
1095 | { | |
1096 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1097 | enum bt_property_availability availability; | |
1098 | const bt_clock_snapshot *clock_snapshot; | |
1099 | uint64_t end_ts; | |
1100 | uint64_t count; | |
1101 | ||
1102 | clock_snapshot = bt_message_discarded_events_borrow_end_default_clock_snapshot_const(msg_in); | |
1103 | end_ts = bt_clock_snapshot_get_value(clock_snapshot); | |
1104 | ||
1105 | availability = bt_message_discarded_events_get_count(msg_in, &count); | |
1106 | BT_ASSERT_DBG(availability == BT_PROPERTY_AVAILABILITY_AVAILABLE); | |
1107 | ||
1108 | *msg_out = bt_message_discarded_events_create_with_default_clock_snapshots( | |
1109 | iter, stream, new_begin_ts, end_ts); | |
1110 | if (!*msg_out) { | |
1111 | status = LTTNG_LIVE_ITERATOR_STATUS_NOMEM; | |
1112 | goto end; | |
1113 | } | |
1114 | ||
1115 | bt_message_discarded_events_set_count(*msg_out, count); | |
1116 | end: | |
1117 | return status; | |
1118 | } | |
1119 | ||
7cdc2bab | 1120 | static |
14f28187 FD |
1121 | enum lttng_live_iterator_status next_stream_iterator_for_trace( |
1122 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1123 | struct lttng_live_trace *live_trace, | |
a31f4d8b | 1124 | struct lttng_live_stream_iterator **youngest_trace_stream_iter) |
7cdc2bab | 1125 | { |
a31f4d8b | 1126 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; |
0f1979c3 FD |
1127 | bt_logging_level log_level = lttng_live_msg_iter->log_level; |
1128 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; | |
14f28187 | 1129 | enum lttng_live_iterator_status stream_iter_status;; |
a31f4d8b | 1130 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
14f28187 | 1131 | uint64_t stream_iter_idx; |
7cdc2bab | 1132 | |
98b15851 PP |
1133 | BT_ASSERT_DBG(live_trace); |
1134 | BT_ASSERT_DBG(live_trace->stream_iterators); | |
ecb4ba8a FD |
1135 | |
1136 | BT_COMP_LOGD("Finding the next stream iterator for trace: " | |
1137 | "trace-id=%"PRIu64, live_trace->id); | |
14f28187 FD |
1138 | /* |
1139 | * Update the current message of every stream iterators of this trace. | |
1140 | * The current msg of every stream must have a timestamp equal or | |
1141 | * larger than the last message returned by this iterator. We must | |
1142 | * ensure monotonicity. | |
1143 | */ | |
1144 | stream_iter_idx = 0; | |
1145 | while (stream_iter_idx < live_trace->stream_iterators->len) { | |
1146 | bool stream_iter_is_ended = false; | |
1147 | struct lttng_live_stream_iterator *stream_iter = | |
1148 | g_ptr_array_index(live_trace->stream_iterators, | |
0f1979c3 | 1149 | stream_iter_idx); |
14f28187 FD |
1150 | |
1151 | /* | |
f080b7e2 FD |
1152 | * If there is no current message for this stream, go fetch |
1153 | * one. | |
14f28187 FD |
1154 | */ |
1155 | while (!stream_iter->current_msg) { | |
cad707e2 | 1156 | const bt_message *msg = NULL; |
14f28187 | 1157 | int64_t curr_msg_ts_ns = INT64_MAX; |
f93afbf9 | 1158 | |
a31f4d8b | 1159 | stream_iter_status = lttng_live_iterator_next_msg_on_stream( |
0f1979c3 | 1160 | lttng_live_msg_iter, stream_iter, &msg); |
14f28187 | 1161 | |
14f28187 FD |
1162 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { |
1163 | stream_iter_is_ended = true; | |
1164 | break; | |
1165 | } | |
1166 | ||
1167 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1168 | goto end; | |
1169 | } | |
1170 | ||
98b15851 | 1171 | BT_ASSERT_DBG(msg); |
14f28187 | 1172 | |
f93afbf9 FD |
1173 | BT_COMP_LOGD("Live stream iterator returned message: msg-type=%s" |
1174 | "stream-name=\"%s\", viewer-stream-id=%" PRIu64, | |
1175 | bt_common_message_type_string(bt_message_get_type(msg)), | |
1176 | stream_iter->name->str, stream_iter->viewer_stream_id); | |
1177 | ||
14f28187 FD |
1178 | /* |
1179 | * Get the timestamp in nanoseconds from origin of this | |
1180 | * messsage. | |
1181 | */ | |
1182 | live_get_msg_ts_ns(stream_iter, lttng_live_msg_iter, | |
1183 | msg, lttng_live_msg_iter->last_msg_ts_ns, | |
1184 | &curr_msg_ts_ns); | |
1185 | ||
1186 | /* | |
1187 | * Check if the message of the current live stream | |
118ae153 | 1188 | * iterator occurred at the exact same time or after the |
14f28187 FD |
1189 | * last message returned by this component's message |
1190 | * iterator. If not, we return an error. | |
1191 | */ | |
1192 | if (curr_msg_ts_ns >= lttng_live_msg_iter->last_msg_ts_ns) { | |
1193 | stream_iter->current_msg = msg; | |
1194 | stream_iter->current_msg_ts_ns = curr_msg_ts_ns; | |
6488b176 JG |
1195 | } else { |
1196 | const bt_clock_class *clock_class; | |
1197 | const bt_stream_class *stream_class; | |
1198 | enum bt_clock_class_cycles_to_ns_from_origin_status ts_ns_status; | |
1199 | int64_t last_inactivity_ts_ns; | |
1200 | ||
1201 | stream_class = bt_stream_borrow_class_const(stream_iter->stream); | |
1202 | clock_class = bt_stream_class_borrow_default_clock_class_const(stream_class); | |
1203 | ||
1204 | ts_ns_status = bt_clock_class_cycles_to_ns_from_origin( | |
1205 | clock_class, | |
1206 | stream_iter->last_inactivity_ts, | |
1207 | &last_inactivity_ts_ns); | |
1208 | if (ts_ns_status != BT_CLOCK_CLASS_CYCLES_TO_NS_FROM_ORIGIN_STATUS_OK) { | |
1209 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
1210 | goto end; | |
8ec4d5ff JG |
1211 | } |
1212 | ||
6488b176 JG |
1213 | if (last_inactivity_ts_ns > curr_msg_ts_ns && |
1214 | is_discarded_packet_or_event_message(msg)) { | |
1215 | /* | |
1216 | * The CTF message iterator emits Discarded | |
1217 | * Packets and Events with synthesized begin and | |
1218 | * end timestamps from the bounds of the last | |
1219 | * known packet and the newly decoded packet | |
1220 | * header. | |
1221 | * | |
1222 | * The CTF message iterator is not aware of | |
1223 | * stream inactivity beacons. Hence, we have | |
1224 | * to adjust the begin timestamp of those types | |
1225 | * of messages if a stream signaled its | |
1226 | * inactivity up until _after_ the last known | |
1227 | * packet's begin timestamp. | |
1228 | * | |
1229 | * Otherwise, the monotonicity guarantee would | |
1230 | * not be preserved. | |
1231 | */ | |
1232 | const enum bt_message_type msg_type = | |
1233 | bt_message_get_type(msg); | |
1234 | enum lttng_live_iterator_status adjust_status = | |
1235 | LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1236 | bt_message *adjusted_message; | |
1237 | ||
1238 | switch (msg_type) { | |
1239 | case BT_MESSAGE_TYPE_DISCARDED_EVENTS: | |
1240 | adjust_status = adjust_discarded_events_message( | |
1241 | lttng_live_msg_iter->self_msg_iter, | |
1242 | stream_iter->stream, | |
1243 | msg, &adjusted_message, | |
1244 | stream_iter->last_inactivity_ts); | |
1245 | break; | |
1246 | case BT_MESSAGE_TYPE_DISCARDED_PACKETS: | |
1247 | adjust_status = adjust_discarded_packets_message( | |
1248 | lttng_live_msg_iter->self_msg_iter, | |
1249 | stream_iter->stream, | |
1250 | msg, &adjusted_message, | |
1251 | stream_iter->last_inactivity_ts); | |
1252 | break; | |
1253 | default: | |
1254 | bt_common_abort(); | |
1255 | } | |
1256 | ||
1257 | if (adjust_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1258 | stream_iter_status = adjust_status; | |
1259 | goto end; | |
1260 | } | |
1261 | ||
1262 | BT_ASSERT_DBG(adjusted_message); | |
1263 | stream_iter->current_msg = adjusted_message; | |
1264 | stream_iter->current_msg_ts_ns = | |
1265 | last_inactivity_ts_ns; | |
1266 | } else { | |
1267 | /* | |
1268 | * We received a message in the past. To ensure | |
1269 | * monotonicity, we can't send it forward. | |
1270 | */ | |
1271 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1272 | "Message's timestamp is less than " | |
1273 | "lttng-live's message iterator's last " | |
1274 | "returned timestamp: " | |
1275 | "lttng-live-msg-iter-addr=%p, ts=%" PRId64 ", " | |
1276 | "last-msg-ts=%" PRId64, | |
1277 | lttng_live_msg_iter, curr_msg_ts_ns, | |
1278 | lttng_live_msg_iter->last_msg_ts_ns); | |
1279 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
8ec4d5ff JG |
1280 | goto end; |
1281 | } | |
14f28187 FD |
1282 | } |
1283 | } | |
1284 | ||
98b15851 | 1285 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1286 | |
1287 | if (!stream_iter_is_ended) { | |
a31f4d8b FD |
1288 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1289 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
07afb6bc FD |
1290 | /* |
1291 | * Update the current best candidate message | |
1292 | * for the stream iterator of this live trace | |
1293 | * to be forwarded downstream. | |
1294 | */ | |
a31f4d8b FD |
1295 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1296 | youngest_candidate_stream_iter = stream_iter; | |
1297 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1298 | /* |
1299 | * Order the messages in an arbitrary but | |
1300 | * deterministic way. | |
1301 | */ | |
98b15851 | 1302 | BT_ASSERT_DBG(stream_iter != youngest_candidate_stream_iter); |
07afb6bc FD |
1303 | int ret = common_muxing_compare_messages( |
1304 | stream_iter->current_msg, | |
a31f4d8b | 1305 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1306 | if (ret < 0) { |
1307 | /* | |
a31f4d8b | 1308 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1309 | * should go first. Update the next |
1310 | * iterator and the current timestamp. | |
1311 | */ | |
a31f4d8b FD |
1312 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1313 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1314 | } else if (ret == 0) { |
1315 | /* | |
1316 | * Unable to pick which one should go | |
1317 | * first. | |
1318 | */ | |
1319 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1320 | "stream-iter-addr=%p" | |
1321 | "stream-iter-addr=%p", | |
1322 | stream_iter, | |
a31f4d8b | 1323 | youngest_candidate_stream_iter); |
07afb6bc FD |
1324 | } |
1325 | } | |
14f28187 | 1326 | |
07afb6bc FD |
1327 | stream_iter_idx++; |
1328 | } else { | |
14f28187 | 1329 | /* |
fba9b58e JG |
1330 | * The live stream iterator has ended. That |
1331 | * iterator is removed from the array, but | |
1332 | * there is no need to increment | |
1333 | * stream_iter_idx as | |
1334 | * g_ptr_array_remove_index_fast replaces the | |
1335 | * removed element with the array's last | |
1336 | * element. | |
14f28187 | 1337 | */ |
fba9b58e JG |
1338 | g_ptr_array_remove_index_fast( |
1339 | live_trace->stream_iterators, | |
14f28187 | 1340 | stream_iter_idx); |
14f28187 FD |
1341 | } |
1342 | } | |
1343 | ||
a31f4d8b FD |
1344 | if (youngest_candidate_stream_iter) { |
1345 | *youngest_trace_stream_iter = youngest_candidate_stream_iter; | |
14f28187 FD |
1346 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
1347 | } else { | |
1348 | /* | |
1349 | * The only case where we don't have a candidate for this trace | |
1350 | * is if we reached the end of all the iterators. | |
1351 | */ | |
1352 | BT_ASSERT(live_trace->stream_iterators->len == 0); | |
1353 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
1354 | } | |
1355 | ||
1356 | end: | |
1357 | return stream_iter_status; | |
1358 | } | |
1359 | ||
1360 | static | |
1361 | enum lttng_live_iterator_status next_stream_iterator_for_session( | |
1362 | struct lttng_live_msg_iter *lttng_live_msg_iter, | |
1363 | struct lttng_live_session *session, | |
a31f4d8b | 1364 | struct lttng_live_stream_iterator **youngest_session_stream_iter) |
14f28187 | 1365 | { |
07afb6bc FD |
1366 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1367 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1368 | enum lttng_live_iterator_status stream_iter_status; |
1369 | uint64_t trace_idx = 0; | |
a31f4d8b FD |
1370 | int64_t youngest_candidate_msg_ts = INT64_MAX; |
1371 | struct lttng_live_stream_iterator *youngest_candidate_stream_iter = NULL; | |
14f28187 | 1372 | |
ecb4ba8a FD |
1373 | BT_COMP_LOGD("Finding the next stream iterator for session: " |
1374 | "session-id=%"PRIu64, session->id); | |
14f28187 FD |
1375 | /* |
1376 | * Make sure we are attached to the session and look for new streams | |
1377 | * and metadata. | |
1378 | */ | |
1379 | stream_iter_status = lttng_live_get_session(lttng_live_msg_iter, session); | |
1380 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK && | |
1381 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_CONTINUE && | |
1382 | stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_END) { | |
7cdc2bab MD |
1383 | goto end; |
1384 | } | |
14f28187 | 1385 | |
98b15851 | 1386 | BT_ASSERT_DBG(session->traces); |
14f28187 | 1387 | |
14f28187 FD |
1388 | while (trace_idx < session->traces->len) { |
1389 | bool trace_is_ended = false; | |
1390 | struct lttng_live_stream_iterator *stream_iter; | |
1391 | struct lttng_live_trace *trace = | |
1392 | g_ptr_array_index(session->traces, trace_idx); | |
1393 | ||
1394 | stream_iter_status = next_stream_iterator_for_trace( | |
1395 | lttng_live_msg_iter, trace, &stream_iter); | |
1396 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1397 | /* | |
1398 | * All the live stream iterators for this trace are | |
1399 | * ENDed. Remove the trace from this session. | |
1400 | */ | |
1401 | trace_is_ended = true; | |
1402 | } else if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
1403 | goto end; | |
1404 | } | |
1405 | ||
1406 | if (!trace_is_ended) { | |
98b15851 | 1407 | BT_ASSERT_DBG(stream_iter); |
14f28187 | 1408 | |
a31f4d8b FD |
1409 | if (G_UNLIKELY(youngest_candidate_stream_iter == NULL) || |
1410 | stream_iter->current_msg_ts_ns < youngest_candidate_msg_ts) { | |
1411 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; | |
1412 | youngest_candidate_stream_iter = stream_iter; | |
1413 | } else if (stream_iter->current_msg_ts_ns == youngest_candidate_msg_ts) { | |
07afb6bc FD |
1414 | /* |
1415 | * Order the messages in an arbitrary but | |
1416 | * deterministic way. | |
1417 | */ | |
1418 | int ret = common_muxing_compare_messages( | |
1419 | stream_iter->current_msg, | |
a31f4d8b | 1420 | youngest_candidate_stream_iter->current_msg); |
07afb6bc FD |
1421 | if (ret < 0) { |
1422 | /* | |
a31f4d8b | 1423 | * The `youngest_candidate_stream_iter->current_msg` |
07afb6bc FD |
1424 | * should go first. Update the next iterator |
1425 | * and the current timestamp. | |
1426 | */ | |
a31f4d8b FD |
1427 | youngest_candidate_msg_ts = stream_iter->current_msg_ts_ns; |
1428 | youngest_candidate_stream_iter = stream_iter; | |
07afb6bc FD |
1429 | } else if (ret == 0) { |
1430 | /* Unable to pick which one should go first. */ | |
1431 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1432 | "stream-iter-addr=%p" "stream-iter-addr=%p", | |
a31f4d8b | 1433 | stream_iter, youngest_candidate_stream_iter); |
07afb6bc | 1434 | } |
14f28187 FD |
1435 | } |
1436 | trace_idx++; | |
1437 | } else { | |
ba90bce7 JG |
1438 | /* |
1439 | * trace_idx is not incremented since | |
1440 | * g_ptr_array_remove_index_fast replaces the | |
1441 | * element at trace_idx with the array's last element. | |
1442 | */ | |
1443 | g_ptr_array_remove_index_fast(session->traces, | |
1444 | trace_idx); | |
14f28187 FD |
1445 | } |
1446 | } | |
a31f4d8b FD |
1447 | if (youngest_candidate_stream_iter) { |
1448 | *youngest_session_stream_iter = youngest_candidate_stream_iter; | |
14f28187 | 1449 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab | 1450 | } else { |
14f28187 FD |
1451 | /* |
1452 | * The only cases where we don't have a candidate for this | |
1453 | * trace is: | |
1454 | * 1. if we reached the end of all the iterators of all the | |
1455 | * traces of this session, | |
1456 | * 2. if we never had live stream iterator in the first place. | |
1457 | * | |
1458 | * In either cases, we return END. | |
1459 | */ | |
1460 | BT_ASSERT(session->traces->len == 0); | |
1461 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
7cdc2bab MD |
1462 | } |
1463 | end: | |
14f28187 FD |
1464 | return stream_iter_status; |
1465 | } | |
1466 | ||
1467 | static inline | |
1468 | void put_messages(bt_message_array_const msgs, uint64_t count) | |
1469 | { | |
1470 | uint64_t i; | |
1471 | ||
1472 | for (i = 0; i < count; i++) { | |
1473 | BT_MESSAGE_PUT_REF_AND_RESET(msgs[i]); | |
7cdc2bab | 1474 | } |
7cdc2bab MD |
1475 | } |
1476 | ||
d3eb6e8f | 1477 | BT_HIDDEN |
a3f0c7db | 1478 | bt_message_iterator_class_next_method_status lttng_live_msg_iter_next( |
14f28187 FD |
1479 | bt_self_message_iterator *self_msg_it, |
1480 | bt_message_array_const msgs, uint64_t capacity, | |
1481 | uint64_t *count) | |
d3eb6e8f | 1482 | { |
a3f0c7db | 1483 | bt_message_iterator_class_next_method_status status; |
f79c2d7a | 1484 | enum lttng_live_viewer_status viewer_status; |
14f28187 FD |
1485 | struct lttng_live_msg_iter *lttng_live_msg_iter = |
1486 | bt_self_message_iterator_get_data(self_msg_it); | |
1487 | struct lttng_live_component *lttng_live = | |
1488 | lttng_live_msg_iter->lttng_live_comp; | |
376fc2bd FD |
1489 | bt_self_component *self_comp = lttng_live_msg_iter->self_comp; |
1490 | bt_logging_level log_level = lttng_live_msg_iter->log_level; | |
14f28187 FD |
1491 | enum lttng_live_iterator_status stream_iter_status; |
1492 | uint64_t session_idx; | |
1493 | ||
1494 | *count = 0; | |
1495 | ||
98b15851 | 1496 | BT_ASSERT_DBG(lttng_live_msg_iter); |
14f28187 | 1497 | |
f79c2d7a FD |
1498 | if (G_UNLIKELY(lttng_live_msg_iter->was_interrupted)) { |
1499 | /* | |
1500 | * The iterator was interrupted in a previous call to the | |
1501 | * `_next()` method. We currently do not support generating | |
1502 | * messages after such event. The babeltrace2 CLI should never | |
1503 | * be running the graph after being interrupted. So this check | |
1504 | * is to prevent other graph users from using this live | |
1505 | * iterator in an messed up internal state. | |
1506 | */ | |
a3f0c7db | 1507 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR; |
f79c2d7a FD |
1508 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1509 | "Message iterator was interrupted during a previous call to the `next()` and currently does not support continuing after such event."); | |
1510 | goto end; | |
1511 | } | |
1512 | ||
14f28187 FD |
1513 | /* |
1514 | * Clear all the invalid message reference that might be left over in | |
1515 | * the output array. | |
1516 | */ | |
1517 | memset(msgs, 0, capacity * sizeof(*msgs)); | |
1518 | ||
1519 | /* | |
1520 | * If no session are exposed on the relay found at the url provided by | |
1521 | * the user, session count will be 0. In this case, we return status | |
1522 | * end to return gracefully. | |
1523 | */ | |
1524 | if (lttng_live_msg_iter->sessions->len == 0) { | |
1525 | if (lttng_live->params.sess_not_found_act != | |
1526 | SESSION_NOT_FOUND_ACTION_CONTINUE) { | |
a3f0c7db | 1527 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END; |
f79c2d7a | 1528 | goto end; |
14f28187 FD |
1529 | } else { |
1530 | /* | |
1531 | * The are no more active session for this session | |
1532 | * name. Retry to create a viewer session for the | |
1533 | * requested session name. | |
1534 | */ | |
f79c2d7a FD |
1535 | viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter); |
1536 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1537 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
a3f0c7db | 1538 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR; |
f79c2d7a FD |
1539 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1540 | "Error creating LTTng live viewer session"); | |
1541 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
a3f0c7db | 1542 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN; |
f79c2d7a FD |
1543 | } else { |
1544 | bt_common_abort(); | |
1545 | } | |
1546 | goto end; | |
14f28187 FD |
1547 | } |
1548 | } | |
1549 | } | |
1550 | ||
1551 | if (lttng_live_msg_iter->active_stream_iter == 0) { | |
1552 | lttng_live_force_new_streams_and_metadata(lttng_live_msg_iter); | |
1553 | } | |
1554 | ||
1555 | /* | |
1556 | * Here the muxing of message is done. | |
1557 | * | |
1558 | * We need to iterate over all the streams of all the traces of all the | |
1559 | * viewer sessions in order to get the message with the smallest | |
1560 | * timestamp. In this case, a session is a viewer session and there is | |
1561 | * one viewer session per consumer daemon. (UST 32bit, UST 64bit and/or | |
1562 | * kernel). Each viewer session can have multiple traces, for example, | |
1563 | * 64bit UST viewer sessions could have multiple per-pid traces. | |
1564 | * | |
1565 | * We iterate over the streams of each traces to update and see what is | |
1566 | * their next message's timestamp. From those timestamps, we select the | |
1567 | * message with the smallest timestamp as the best candidate message | |
1568 | * for that trace and do the same thing across all the sessions. | |
1569 | * | |
1570 | * We then compare the timestamp of best candidate message of all the | |
1571 | * sessions to pick the message with the smallest timestamp and we | |
1572 | * return it. | |
1573 | */ | |
1574 | while (*count < capacity) { | |
a31f4d8b FD |
1575 | struct lttng_live_stream_iterator *youngest_stream_iter = NULL, |
1576 | *candidate_stream_iter = NULL; | |
1577 | int64_t youngest_msg_ts_ns = INT64_MAX; | |
14f28187 | 1578 | |
98b15851 | 1579 | BT_ASSERT_DBG(lttng_live_msg_iter->sessions); |
14f28187 | 1580 | session_idx = 0; |
14f28187 FD |
1581 | while (session_idx < lttng_live_msg_iter->sessions->len) { |
1582 | struct lttng_live_session *session = | |
1583 | g_ptr_array_index(lttng_live_msg_iter->sessions, | |
1584 | session_idx); | |
1585 | ||
1586 | /* Find the best candidate message to send downstream. */ | |
1587 | stream_iter_status = next_stream_iterator_for_session( | |
1588 | lttng_live_msg_iter, session, | |
1589 | &candidate_stream_iter); | |
1590 | ||
1591 | /* If we receive an END status, it means that either: | |
1592 | * - Those traces never had active streams (UST with no | |
1593 | * data produced yet), | |
1594 | * - All live stream iterators have ENDed.*/ | |
1595 | if (stream_iter_status == LTTNG_LIVE_ITERATOR_STATUS_END) { | |
1596 | if (session->closed && session->traces->len == 0) { | |
1597 | /* | |
7d632b96 JG |
1598 | * Remove the session from the list. |
1599 | * session_idx is not modified since | |
1600 | * g_ptr_array_remove_index_fast | |
1601 | * replaces the the removed element with | |
1602 | * the array's last element. | |
14f28187 FD |
1603 | */ |
1604 | g_ptr_array_remove_index_fast( | |
1605 | lttng_live_msg_iter->sessions, | |
1606 | session_idx); | |
14f28187 FD |
1607 | } else { |
1608 | session_idx++; | |
1609 | } | |
1610 | continue; | |
1611 | } | |
1612 | ||
1613 | if (stream_iter_status != LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
f79c2d7a | 1614 | goto return_status; |
14f28187 FD |
1615 | } |
1616 | ||
a31f4d8b | 1617 | if (G_UNLIKELY(youngest_stream_iter == NULL) || |
1d314141 | 1618 | candidate_stream_iter->current_msg_ts_ns < youngest_msg_ts_ns) { |
a31f4d8b FD |
1619 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1620 | youngest_stream_iter = candidate_stream_iter; | |
1621 | } else if (candidate_stream_iter->current_msg_ts_ns == youngest_msg_ts_ns) { | |
376fc2bd FD |
1622 | /* |
1623 | * The currently selected message to be sent | |
1624 | * downstream next has the exact same timestamp | |
1625 | * that of the current candidate message. We | |
1626 | * must break the tie in a predictable manner. | |
1627 | */ | |
1628 | BT_COMP_LOGD_STR("Two of the next message candidates have the same timestamps, pick one deterministically."); | |
1629 | /* | |
1630 | * Order the messages in an arbitrary but | |
07afb6bc | 1631 | * deterministic way. |
376fc2bd | 1632 | */ |
07afb6bc FD |
1633 | int ret = common_muxing_compare_messages( |
1634 | candidate_stream_iter->current_msg, | |
a31f4d8b | 1635 | youngest_stream_iter->current_msg); |
376fc2bd FD |
1636 | if (ret < 0) { |
1637 | /* | |
1638 | * The `candidate_stream_iter->current_msg` | |
1639 | * should go first. Update the next | |
1640 | * iterator and the current timestamp. | |
1641 | */ | |
a31f4d8b FD |
1642 | youngest_msg_ts_ns = candidate_stream_iter->current_msg_ts_ns; |
1643 | youngest_stream_iter = candidate_stream_iter; | |
376fc2bd FD |
1644 | } else if (ret == 0) { |
1645 | /* Unable to pick which one should go first. */ | |
1646 | BT_COMP_LOGW("Cannot deterministically pick next live stream message iterator because they have identical next messages: " | |
1647 | "next-stream-iter-addr=%p" "candidate-stream-iter-addr=%p", | |
a31f4d8b | 1648 | youngest_stream_iter, candidate_stream_iter); |
376fc2bd | 1649 | } |
14f28187 FD |
1650 | } |
1651 | ||
1652 | session_idx++; | |
1653 | } | |
1654 | ||
a31f4d8b | 1655 | if (!youngest_stream_iter) { |
14f28187 | 1656 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
f79c2d7a | 1657 | goto return_status; |
14f28187 FD |
1658 | } |
1659 | ||
98b15851 | 1660 | BT_ASSERT_DBG(youngest_stream_iter->current_msg); |
14f28187 | 1661 | /* Ensure monotonicity. */ |
98b15851 | 1662 | BT_ASSERT_DBG(lttng_live_msg_iter->last_msg_ts_ns <= |
a31f4d8b | 1663 | youngest_stream_iter->current_msg_ts_ns); |
14f28187 FD |
1664 | |
1665 | /* | |
1666 | * Insert the next message to the message batch. This will set | |
1667 | * stream iterator current messsage to NULL so that next time | |
1668 | * we fetch the next message of that stream iterator | |
1669 | */ | |
a31f4d8b | 1670 | BT_MESSAGE_MOVE_REF(msgs[*count], youngest_stream_iter->current_msg); |
14f28187 FD |
1671 | (*count)++; |
1672 | ||
1673 | /* Update the last timestamp in nanoseconds sent downstream. */ | |
a31f4d8b FD |
1674 | lttng_live_msg_iter->last_msg_ts_ns = youngest_msg_ts_ns; |
1675 | youngest_stream_iter->current_msg_ts_ns = INT64_MAX; | |
14f28187 FD |
1676 | |
1677 | stream_iter_status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
1678 | } | |
f79c2d7a FD |
1679 | |
1680 | return_status: | |
14f28187 FD |
1681 | switch (stream_iter_status) { |
1682 | case LTTNG_LIVE_ITERATOR_STATUS_OK: | |
1683 | case LTTNG_LIVE_ITERATOR_STATUS_AGAIN: | |
f79c2d7a FD |
1684 | /* |
1685 | * If we gathered messages, return _OK even if the graph was | |
1686 | * interrupted. This allows for the components downstream to at | |
1687 | * least get the thoses messages. If the graph was indeed | |
1688 | * interrupted there should not be another _next() call as the | |
1689 | * application will tear down the graph. This component class | |
1690 | * doesn't support restarting after an interruption. | |
1691 | */ | |
14f28187 | 1692 | if (*count > 0) { |
a3f0c7db | 1693 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_OK; |
14f28187 | 1694 | } else { |
a3f0c7db | 1695 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_AGAIN; |
14f28187 | 1696 | } |
7cdc2bab | 1697 | break; |
14f28187 | 1698 | case LTTNG_LIVE_ITERATOR_STATUS_END: |
a3f0c7db | 1699 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_END; |
7cdc2bab | 1700 | break; |
14f28187 | 1701 | case LTTNG_LIVE_ITERATOR_STATUS_NOMEM: |
b607a4f7 FD |
1702 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1703 | "Memory error preparing the next batch of messages: " | |
1704 | "live-iter-status=%s", | |
1705 | lttng_live_iterator_status_string(stream_iter_status)); | |
a3f0c7db | 1706 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_MEMORY_ERROR; |
14f28187 FD |
1707 | break; |
1708 | case LTTNG_LIVE_ITERATOR_STATUS_ERROR: | |
1709 | case LTTNG_LIVE_ITERATOR_STATUS_INVAL: | |
1710 | case LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED: | |
b607a4f7 FD |
1711 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1712 | "Error preparing the next batch of messages: " | |
1713 | "live-iter-status=%s", | |
1714 | lttng_live_iterator_status_string(stream_iter_status)); | |
1715 | ||
a3f0c7db | 1716 | status = BT_MESSAGE_ITERATOR_CLASS_NEXT_METHOD_STATUS_ERROR; |
14f28187 FD |
1717 | /* Put all existing messages on error. */ |
1718 | put_messages(msgs, *count); | |
7cdc2bab | 1719 | break; |
14f28187 | 1720 | default: |
498e7994 | 1721 | bt_common_abort(); |
7cdc2bab | 1722 | } |
14f28187 | 1723 | |
f79c2d7a | 1724 | end: |
14f28187 | 1725 | return status; |
7cdc2bab | 1726 | } |
41a2b7ae | 1727 | |
4f74db52 FD |
1728 | static |
1729 | struct lttng_live_msg_iter *lttng_live_msg_iter_create( | |
1730 | struct lttng_live_component *lttng_live_comp, | |
1731 | bt_self_message_iterator *self_msg_it) | |
1732 | { | |
1733 | bt_self_component *self_comp = lttng_live_comp->self_comp; | |
1734 | bt_logging_level log_level = lttng_live_comp->log_level; | |
1735 | ||
1736 | struct lttng_live_msg_iter *lttng_live_msg_iter = | |
1737 | g_new0(struct lttng_live_msg_iter, 1); | |
1738 | if (!lttng_live_msg_iter) { | |
1739 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1740 | "Failed to allocate lttng_live_msg_iter"); | |
1741 | goto end; | |
1742 | } | |
1743 | ||
1744 | lttng_live_msg_iter->log_level = lttng_live_comp->log_level; | |
1745 | lttng_live_msg_iter->self_comp = lttng_live_comp->self_comp; | |
1746 | lttng_live_msg_iter->lttng_live_comp = lttng_live_comp; | |
1747 | lttng_live_msg_iter->self_msg_iter = self_msg_it; | |
1748 | ||
1749 | lttng_live_msg_iter->active_stream_iter = 0; | |
1750 | lttng_live_msg_iter->last_msg_ts_ns = INT64_MIN; | |
1751 | lttng_live_msg_iter->was_interrupted = false; | |
1752 | ||
1753 | lttng_live_msg_iter->sessions = g_ptr_array_new_with_free_func( | |
1754 | (GDestroyNotify) lttng_live_destroy_session); | |
1755 | BT_ASSERT(lttng_live_msg_iter->sessions); | |
1756 | ||
1757 | end: | |
1758 | return lttng_live_msg_iter; | |
1759 | ||
1760 | } | |
1761 | ||
7cdc2bab | 1762 | BT_HIDDEN |
a3f0c7db | 1763 | bt_message_iterator_class_initialize_method_status lttng_live_msg_iter_init( |
14f28187 | 1764 | bt_self_message_iterator *self_msg_it, |
8d8b141d | 1765 | bt_self_message_iterator_configuration *config, |
14f28187 | 1766 | bt_self_component_port_output *self_port) |
7cdc2bab | 1767 | { |
a3f0c7db | 1768 | bt_message_iterator_class_initialize_method_status status; |
14f28187 FD |
1769 | struct lttng_live_component *lttng_live; |
1770 | struct lttng_live_msg_iter *lttng_live_msg_iter; | |
f79c2d7a | 1771 | enum lttng_live_viewer_status viewer_status; |
c01594de | 1772 | bt_logging_level log_level; |
f615b250 PP |
1773 | bt_self_component *self_comp = |
1774 | bt_self_message_iterator_borrow_component(self_msg_it); | |
14f28187 FD |
1775 | |
1776 | lttng_live = bt_self_component_get_data(self_comp); | |
c01594de | 1777 | log_level = lttng_live->log_level; |
2ece7dd0 | 1778 | self_comp = lttng_live->self_comp; |
14f28187 | 1779 | |
4f74db52 | 1780 | |
14f28187 FD |
1781 | /* There can be only one downstream iterator at the same time. */ |
1782 | BT_ASSERT(!lttng_live->has_msg_iter); | |
1783 | lttng_live->has_msg_iter = true; | |
1784 | ||
4f74db52 FD |
1785 | lttng_live_msg_iter = lttng_live_msg_iter_create(lttng_live, |
1786 | self_msg_it); | |
14f28187 | 1787 | if (!lttng_live_msg_iter) { |
a3f0c7db | 1788 | status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
f79c2d7a | 1789 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
4f74db52 FD |
1790 | "Failed to create lttng_live_msg_iter"); |
1791 | goto error; | |
7cdc2bab | 1792 | } |
14f28187 | 1793 | |
f79c2d7a FD |
1794 | viewer_status = live_viewer_connection_create(self_comp, NULL, |
1795 | log_level, lttng_live->params.url->str, false, | |
1796 | lttng_live_msg_iter, <tng_live_msg_iter->viewer_connection); | |
1797 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1798 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
1799 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1800 | "Failed to create viewer connection"); | |
1801 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
1802 | /* | |
1803 | * Interruption in the _iter_init() method is not | |
1804 | * supported. Return an error. | |
1805 | */ | |
1806 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1807 | "Interrupted while creating viewer connection"); | |
1808 | } | |
14f28187 FD |
1809 | goto error; |
1810 | } | |
1811 | ||
f79c2d7a FD |
1812 | viewer_status = lttng_live_create_viewer_session(lttng_live_msg_iter); |
1813 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1814 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
1815 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1816 | "Failed to create viewer session"); | |
1817 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
1818 | /* | |
1819 | * Interruption in the _iter_init() method is not | |
1820 | * supported. Return an error. | |
1821 | */ | |
1822 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
1823 | "Interrupted when creating viewer session"); | |
1824 | } | |
14f28187 FD |
1825 | goto error; |
1826 | } | |
f79c2d7a | 1827 | |
14f28187 FD |
1828 | if (lttng_live_msg_iter->sessions->len == 0) { |
1829 | switch (lttng_live->params.sess_not_found_act) { | |
1830 | case SESSION_NOT_FOUND_ACTION_CONTINUE: | |
f79c2d7a | 1831 | BT_COMP_LOGI("Unable to connect to the requested live viewer session. Keep trying to connect because of " |
14f28187 FD |
1832 | "%s=\"%s\" component parameter: url=\"%s\"", |
1833 | SESS_NOT_FOUND_ACTION_PARAM, | |
1834 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
1835 | lttng_live->params.url->str); | |
1836 | break; | |
1837 | case SESSION_NOT_FOUND_ACTION_FAIL: | |
f79c2d7a FD |
1838 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
1839 | "Unable to connect to the requested live viewer session. Fail the message iterator initialization because of %s=\"%s\" " | |
14f28187 FD |
1840 | "component parameter: url =\"%s\"", |
1841 | SESS_NOT_FOUND_ACTION_PARAM, | |
1842 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
1843 | lttng_live->params.url->str); | |
7cdc2bab | 1844 | goto error; |
14f28187 | 1845 | case SESSION_NOT_FOUND_ACTION_END: |
f79c2d7a | 1846 | BT_COMP_LOGI("Unable to connect to the requested live viewer session. End gracefully at the first _next() " |
14f28187 FD |
1847 | "call because of %s=\"%s\" component parameter: " |
1848 | "url=\"%s\"", SESS_NOT_FOUND_ACTION_PARAM, | |
1849 | SESS_NOT_FOUND_ACTION_END_STR, | |
1850 | lttng_live->params.url->str); | |
1851 | break; | |
bce81ff2 | 1852 | default: |
498e7994 | 1853 | bt_common_abort(); |
7cdc2bab | 1854 | } |
7cdc2bab MD |
1855 | } |
1856 | ||
14f28187 | 1857 | bt_self_message_iterator_set_data(self_msg_it, lttng_live_msg_iter); |
a3f0c7db | 1858 | status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_OK; |
14f28187 | 1859 | goto end; |
f79c2d7a | 1860 | |
14f28187 | 1861 | error: |
a3f0c7db | 1862 | status = BT_MESSAGE_ITERATOR_CLASS_INITIALIZE_METHOD_STATUS_ERROR; |
14f28187 | 1863 | lttng_live_msg_iter_destroy(lttng_live_msg_iter); |
7cdc2bab | 1864 | end: |
f79c2d7a | 1865 | return status; |
7cdc2bab MD |
1866 | } |
1867 | ||
80aff5ef SM |
1868 | static struct bt_param_validation_map_value_entry_descr list_sessions_params[] = { |
1869 | { URL_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { .type = BT_VALUE_TYPE_STRING } }, | |
1870 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
1871 | }; | |
1872 | ||
7cdc2bab | 1873 | static |
d24d5663 PP |
1874 | bt_component_class_query_method_status lttng_live_query_list_sessions( |
1875 | const bt_value *params, const bt_value **result, | |
80aff5ef | 1876 | bt_self_component_class *self_comp_class, |
d24d5663 | 1877 | bt_logging_level log_level) |
7cdc2bab | 1878 | { |
80aff5ef | 1879 | bt_component_class_query_method_status status; |
14f28187 | 1880 | const bt_value *url_value = NULL; |
7cdc2bab | 1881 | const char *url; |
14f28187 | 1882 | struct live_viewer_connection *viewer_connection = NULL; |
f79c2d7a | 1883 | enum lttng_live_viewer_status viewer_status; |
80aff5ef SM |
1884 | enum bt_param_validation_status validation_status; |
1885 | gchar *validate_error = NULL; | |
7cdc2bab | 1886 | |
80aff5ef SM |
1887 | validation_status = bt_param_validation_validate(params, |
1888 | list_sessions_params, &validate_error); | |
1889 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
1890 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
7cdc2bab | 1891 | goto error; |
80aff5ef | 1892 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { |
a635e507 | 1893 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
1419db2b FD |
1894 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, "%s", |
1895 | validate_error); | |
7cdc2bab MD |
1896 | goto error; |
1897 | } | |
1898 | ||
80aff5ef | 1899 | url_value = bt_value_map_borrow_entry_value_const(params, URL_PARAM); |
14f28187 FD |
1900 | url = bt_value_string_get(url_value); |
1901 | ||
f79c2d7a FD |
1902 | viewer_status = live_viewer_connection_create(NULL, self_comp_class, |
1903 | log_level, url, true, NULL, &viewer_connection); | |
1904 | if (viewer_status != LTTNG_LIVE_VIEWER_STATUS_OK) { | |
1905 | if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_ERROR) { | |
1906 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, | |
1907 | "Failed to create viewer connection"); | |
1908 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
1909 | } else if (viewer_status == LTTNG_LIVE_VIEWER_STATUS_INTERRUPTED) { | |
1910 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_AGAIN; | |
1911 | } else { | |
1912 | bt_common_abort(); | |
1913 | } | |
7cdc2bab MD |
1914 | goto error; |
1915 | } | |
1916 | ||
14f28187 | 1917 | status = live_viewer_connection_list_sessions(viewer_connection, |
80aff5ef | 1918 | result); |
d24d5663 | 1919 | if (status != BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK) { |
1419db2b FD |
1920 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1921 | "Failed to list viewer sessions"); | |
c7eee084 PP |
1922 | goto error; |
1923 | } | |
1924 | ||
7cdc2bab | 1925 | goto end; |
c7eee084 | 1926 | |
7cdc2bab | 1927 | error: |
14f28187 | 1928 | BT_VALUE_PUT_REF_AND_RESET(*result); |
c7eee084 | 1929 | |
14f28187 | 1930 | if (status >= 0) { |
d24d5663 | 1931 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; |
c7eee084 PP |
1932 | } |
1933 | ||
7cdc2bab MD |
1934 | end: |
1935 | if (viewer_connection) { | |
14f28187 | 1936 | live_viewer_connection_destroy(viewer_connection); |
7cdc2bab | 1937 | } |
80aff5ef SM |
1938 | |
1939 | g_free(validate_error); | |
1940 | ||
14f28187 | 1941 | return status; |
7cdc2bab MD |
1942 | } |
1943 | ||
312df793 PP |
1944 | static |
1945 | bt_component_class_query_method_status lttng_live_query_support_info( | |
1946 | const bt_value *params, const bt_value **result, | |
1419db2b | 1947 | bt_self_component_class *self_comp_class, |
312df793 PP |
1948 | bt_logging_level log_level) |
1949 | { | |
1950 | bt_component_class_query_method_status status = | |
1951 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
1952 | const bt_value *input_type_value; | |
1953 | const bt_value *input_value; | |
1954 | double weight = 0; | |
1955 | struct bt_common_lttng_live_url_parts parts = { 0 }; | |
1956 | ||
1957 | /* Used by the logging macros */ | |
1958 | __attribute__((unused)) bt_self_component *self_comp = NULL; | |
1959 | ||
1960 | *result = NULL; | |
1961 | input_type_value = bt_value_map_borrow_entry_value_const(params, | |
1962 | "type"); | |
1963 | if (!input_type_value) { | |
1419db2b FD |
1964 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1965 | "Missing expected `type` parameter."); | |
312df793 PP |
1966 | goto error; |
1967 | } | |
1968 | ||
1969 | if (!bt_value_is_string(input_type_value)) { | |
1419db2b FD |
1970 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1971 | "`type` parameter is not a string value."); | |
312df793 PP |
1972 | goto error; |
1973 | } | |
1974 | ||
1975 | if (strcmp(bt_value_string_get(input_type_value), "string") != 0) { | |
1976 | /* We don't handle file system paths */ | |
1977 | goto create_result; | |
1978 | } | |
1979 | ||
1980 | input_value = bt_value_map_borrow_entry_value_const(params, "input"); | |
1981 | if (!input_value) { | |
1419db2b FD |
1982 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1983 | "Missing expected `input` parameter."); | |
312df793 PP |
1984 | goto error; |
1985 | } | |
1986 | ||
1987 | if (!bt_value_is_string(input_value)) { | |
1419db2b FD |
1988 | BT_COMP_CLASS_LOGE_APPEND_CAUSE(self_comp_class, |
1989 | "`input` parameter is not a string value."); | |
312df793 PP |
1990 | goto error; |
1991 | } | |
1992 | ||
1993 | parts = bt_common_parse_lttng_live_url(bt_value_string_get(input_value), | |
1994 | NULL, 0); | |
1995 | if (parts.session_name) { | |
1996 | /* | |
1997 | * Looks pretty much like an LTTng live URL: we got the | |
1998 | * session name part, which forms a complete URL. | |
1999 | */ | |
2000 | weight = .75; | |
2001 | } | |
2002 | ||
2003 | create_result: | |
2004 | *result = bt_value_real_create_init(weight); | |
2005 | if (!*result) { | |
2006 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_MEMORY_ERROR; | |
2007 | goto error; | |
2008 | } | |
2009 | ||
2010 | goto end; | |
2011 | ||
2012 | error: | |
2013 | if (status >= 0) { | |
2014 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_ERROR; | |
2015 | } | |
2016 | ||
2017 | BT_ASSERT(!*result); | |
2018 | ||
2019 | end: | |
2020 | bt_common_destroy_lttng_live_url_parts(&parts); | |
2021 | return status; | |
2022 | } | |
2023 | ||
7cdc2bab | 2024 | BT_HIDDEN |
d24d5663 PP |
2025 | bt_component_class_query_method_status lttng_live_query( |
2026 | bt_self_component_class_source *comp_class, | |
3c729b9a | 2027 | bt_private_query_executor *priv_query_exec, |
14f28187 | 2028 | const char *object, const bt_value *params, |
7c14d641 | 2029 | __attribute__((unused)) void *method_data, |
3c729b9a | 2030 | const bt_value **result) |
7cdc2bab | 2031 | { |
d24d5663 PP |
2032 | bt_component_class_query_method_status status = |
2033 | BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_OK; | |
2ece7dd0 | 2034 | bt_self_component *self_comp = NULL; |
80aff5ef SM |
2035 | bt_self_component_class *self_comp_class = |
2036 | bt_self_component_class_source_as_self_component_class(comp_class); | |
3c729b9a PP |
2037 | bt_logging_level log_level = bt_query_executor_get_logging_level( |
2038 | bt_private_query_executor_as_query_executor_const( | |
2039 | priv_query_exec)); | |
c7eee084 | 2040 | |
7cdc2bab | 2041 | if (strcmp(object, "sessions") == 0) { |
c01594de | 2042 | status = lttng_live_query_list_sessions(params, result, |
80aff5ef | 2043 | self_comp_class, log_level); |
312df793 PP |
2044 | } else if (strcmp(object, "babeltrace.support-info") == 0) { |
2045 | status = lttng_live_query_support_info(params, result, | |
1419db2b | 2046 | self_comp_class, log_level); |
14f28187 | 2047 | } else { |
32a09ecd | 2048 | BT_COMP_LOGI("Unknown query object `%s`", object); |
76b6c2f7 | 2049 | status = BT_COMPONENT_CLASS_QUERY_METHOD_STATUS_UNKNOWN_OBJECT; |
14f28187 | 2050 | goto end; |
7cdc2bab | 2051 | } |
14f28187 FD |
2052 | |
2053 | end: | |
2054 | return status; | |
7cdc2bab MD |
2055 | } |
2056 | ||
2057 | static | |
2058 | void lttng_live_component_destroy_data(struct lttng_live_component *lttng_live) | |
2059 | { | |
19bdff20 FD |
2060 | if (!lttng_live) { |
2061 | return; | |
2062 | } | |
14f28187 FD |
2063 | if (lttng_live->params.url) { |
2064 | g_string_free(lttng_live->params.url, TRUE); | |
7cdc2bab MD |
2065 | } |
2066 | g_free(lttng_live); | |
2067 | } | |
2068 | ||
2069 | BT_HIDDEN | |
14f28187 | 2070 | void lttng_live_component_finalize(bt_self_component_source *component) |
7cdc2bab | 2071 | { |
14f28187 | 2072 | void *data = bt_self_component_get_data( |
0f1979c3 | 2073 | bt_self_component_source_as_self_component(component)); |
7cdc2bab MD |
2074 | |
2075 | if (!data) { | |
2076 | return; | |
2077 | } | |
2078 | lttng_live_component_destroy_data(data); | |
2079 | } | |
2080 | ||
2081 | static | |
14f28187 FD |
2082 | enum session_not_found_action parse_session_not_found_action_param( |
2083 | const bt_value *no_session_param) | |
2084 | { | |
2085 | enum session_not_found_action action; | |
80aff5ef SM |
2086 | const char *no_session_act_str = bt_value_string_get(no_session_param); |
2087 | ||
14f28187 FD |
2088 | if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_CONTINUE_STR) == 0) { |
2089 | action = SESSION_NOT_FOUND_ACTION_CONTINUE; | |
2090 | } else if (strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_FAIL_STR) == 0) { | |
2091 | action = SESSION_NOT_FOUND_ACTION_FAIL; | |
14f28187 | 2092 | } else { |
80aff5ef SM |
2093 | BT_ASSERT(strcmp(no_session_act_str, SESS_NOT_FOUND_ACTION_END_STR) == 0); |
2094 | action = SESSION_NOT_FOUND_ACTION_END; | |
14f28187 FD |
2095 | } |
2096 | ||
2097 | return action; | |
2098 | } | |
2099 | ||
80aff5ef SM |
2100 | static struct bt_param_validation_value_descr inputs_elem_descr = { |
2101 | .type = BT_VALUE_TYPE_STRING, | |
2102 | }; | |
2103 | ||
2104 | static const char *sess_not_found_action_choices[] = { | |
2105 | SESS_NOT_FOUND_ACTION_CONTINUE_STR, | |
2106 | SESS_NOT_FOUND_ACTION_FAIL_STR, | |
2107 | SESS_NOT_FOUND_ACTION_END_STR, | |
2108 | }; | |
2109 | ||
2110 | static struct bt_param_validation_map_value_entry_descr params_descr[] = { | |
2111 | { INPUTS_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_MANDATORY, { BT_VALUE_TYPE_ARRAY, .array = { | |
2112 | .min_length = 1, | |
2113 | .max_length = 1, | |
2114 | .element_type = &inputs_elem_descr, | |
2115 | } } }, | |
2116 | { SESS_NOT_FOUND_ACTION_PARAM, BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_OPTIONAL, { BT_VALUE_TYPE_STRING, .string = { | |
2117 | .choices = sess_not_found_action_choices, | |
2118 | } } }, | |
2119 | BT_PARAM_VALIDATION_MAP_VALUE_ENTRY_END | |
2120 | }; | |
2121 | ||
70384700 | 2122 | static |
80aff5ef SM |
2123 | bt_component_class_initialize_method_status lttng_live_component_create( |
2124 | const bt_value *params, | |
2125 | bt_logging_level log_level, | |
2126 | bt_self_component *self_comp, | |
2127 | struct lttng_live_component **component) | |
7cdc2bab | 2128 | { |
80aff5ef | 2129 | struct lttng_live_component *lttng_live = NULL; |
312df793 PP |
2130 | const bt_value *inputs_value; |
2131 | const bt_value *url_value; | |
2132 | const bt_value *value; | |
7cdc2bab | 2133 | const char *url; |
80aff5ef SM |
2134 | enum bt_param_validation_status validation_status; |
2135 | gchar *validation_error = NULL; | |
2136 | bt_component_class_initialize_method_status status; | |
2137 | ||
2138 | validation_status = bt_param_validation_validate(params, params_descr, | |
2139 | &validation_error); | |
2140 | if (validation_status == BT_PARAM_VALIDATION_STATUS_MEMORY_ERROR) { | |
2141 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; | |
2142 | goto error; | |
2143 | } else if (validation_status == BT_PARAM_VALIDATION_STATUS_VALIDATION_ERROR) { | |
2144 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "%s", validation_error); | |
2145 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_ERROR; | |
2146 | goto error; | |
2147 | } | |
7cdc2bab MD |
2148 | |
2149 | lttng_live = g_new0(struct lttng_live_component, 1); | |
2150 | if (!lttng_live) { | |
80aff5ef | 2151 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
2152 | goto end; |
2153 | } | |
c01594de | 2154 | lttng_live->log_level = log_level; |
2ece7dd0 | 2155 | lttng_live->self_comp = self_comp; |
7cdc2bab | 2156 | lttng_live->max_query_size = MAX_QUERY_SIZE; |
14f28187 FD |
2157 | lttng_live->has_msg_iter = false; |
2158 | ||
80aff5ef SM |
2159 | inputs_value = |
2160 | bt_value_map_borrow_entry_value_const(params, INPUTS_PARAM); | |
2161 | url_value = | |
2162 | bt_value_array_borrow_element_by_index_const(inputs_value, 0); | |
312df793 | 2163 | url = bt_value_string_get(url_value); |
80aff5ef | 2164 | |
14f28187 FD |
2165 | lttng_live->params.url = g_string_new(url); |
2166 | if (!lttng_live->params.url) { | |
80aff5ef | 2167 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_MEMORY_ERROR; |
7cdc2bab MD |
2168 | goto error; |
2169 | } | |
14f28187 FD |
2170 | |
2171 | value = bt_value_map_borrow_entry_value_const(params, | |
2172 | SESS_NOT_FOUND_ACTION_PARAM); | |
312df793 | 2173 | if (value) { |
14f28187 FD |
2174 | lttng_live->params.sess_not_found_act = |
2175 | parse_session_not_found_action_param(value); | |
14f28187 | 2176 | } else { |
312df793 PP |
2177 | BT_COMP_LOGI("Optional `%s` parameter is missing: " |
2178 | "defaulting to `%s`.", | |
14f28187 FD |
2179 | SESS_NOT_FOUND_ACTION_PARAM, |
2180 | SESS_NOT_FOUND_ACTION_CONTINUE_STR); | |
2181 | lttng_live->params.sess_not_found_act = | |
2182 | SESSION_NOT_FOUND_ACTION_CONTINUE; | |
7cdc2bab | 2183 | } |
4c66436f | 2184 | |
80aff5ef | 2185 | status = BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK; |
7cdc2bab MD |
2186 | goto end; |
2187 | ||
2188 | error: | |
2189 | lttng_live_component_destroy_data(lttng_live); | |
2190 | lttng_live = NULL; | |
2191 | end: | |
80aff5ef SM |
2192 | g_free(validation_error); |
2193 | ||
2194 | *component = lttng_live; | |
2195 | return status; | |
d3e4dcd8 PP |
2196 | } |
2197 | ||
f3bc2010 | 2198 | BT_HIDDEN |
21a9f056 | 2199 | bt_component_class_initialize_method_status lttng_live_component_init( |
c01594de | 2200 | bt_self_component_source *self_comp_src, |
59225a3e SM |
2201 | bt_self_component_source_configuration *config, |
2202 | const bt_value *params, | |
2203 | __attribute__((unused)) void *init_method_data) | |
f3bc2010 | 2204 | { |
7cdc2bab | 2205 | struct lttng_live_component *lttng_live; |
80aff5ef | 2206 | bt_component_class_initialize_method_status ret; |
c01594de PP |
2207 | bt_self_component *self_comp = |
2208 | bt_self_component_source_as_self_component(self_comp_src); | |
2209 | bt_logging_level log_level = bt_component_get_logging_level( | |
2210 | bt_self_component_as_component(self_comp)); | |
d24d5663 | 2211 | bt_self_component_add_port_status add_port_status; |
7cdc2bab | 2212 | |
80aff5ef SM |
2213 | ret = lttng_live_component_create(params, log_level, self_comp, <tng_live); |
2214 | if (ret != BT_COMPONENT_CLASS_INITIALIZE_METHOD_STATUS_OK) { | |
19bdff20 | 2215 | goto error; |
7cdc2bab MD |
2216 | } |
2217 | ||
d24d5663 PP |
2218 | add_port_status = bt_self_component_source_add_output_port( |
2219 | self_comp_src, "out", NULL, NULL); | |
80aff5ef SM |
2220 | if (add_port_status != BT_SELF_COMPONENT_ADD_PORT_STATUS_OK) { |
2221 | ret = (int) add_port_status; | |
2222 | goto end; | |
147337a3 | 2223 | } |
7cdc2bab | 2224 | |
c01594de | 2225 | bt_self_component_set_data(self_comp, lttng_live); |
19bdff20 | 2226 | goto end; |
7cdc2bab | 2227 | |
19bdff20 FD |
2228 | error: |
2229 | lttng_live_component_destroy_data(lttng_live); | |
2230 | lttng_live = NULL; | |
7cdc2bab MD |
2231 | end: |
2232 | return ret; | |
d85ef162 | 2233 | } |