Commit | Line | Data |
---|---|---|
331744e3 JD |
1 | /* |
2 | * Copyright (C) 2012 - Julien Desfossez <julien.desfossez@efficios.com> | |
3 | * David Goulet <dgoulet@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License, version 2 only, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
16 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
6c1c0768 | 19 | #define _LGPL_SOURCE |
331744e3 JD |
20 | #include <assert.h> |
21 | #include <inttypes.h> | |
22 | #include <signal.h> | |
23 | ||
51a9e1c7 | 24 | #include <bin/lttng-consumerd/health-consumerd.h> |
331744e3 | 25 | #include <common/common.h> |
f263b7fd | 26 | #include <common/compat/endian.h> |
d3e2ba59 JD |
27 | #include <common/kernel-ctl/kernel-ctl.h> |
28 | #include <common/kernel-consumer/kernel-consumer.h> | |
c8fea79c JR |
29 | #include <common/consumer/consumer-stream.h> |
30 | #include <common/consumer/consumer-timer.h> | |
31 | #include <common/consumer/consumer-testpoint.h> | |
32 | #include <common/ust-consumer/ust-consumer.h> | |
331744e3 | 33 | |
2b8f8754 MD |
34 | static struct timer_signal_data timer_signal = { |
35 | .tid = 0, | |
36 | .setup_done = 0, | |
37 | .qs_done = 0, | |
38 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
39 | }; | |
331744e3 JD |
40 | |
41 | /* | |
42 | * Set custom signal mask to current thread. | |
43 | */ | |
44 | static void setmask(sigset_t *mask) | |
45 | { | |
46 | int ret; | |
47 | ||
48 | ret = sigemptyset(mask); | |
49 | if (ret) { | |
50 | PERROR("sigemptyset"); | |
51 | } | |
52 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_SWITCH); | |
53 | if (ret) { | |
d3e2ba59 | 54 | PERROR("sigaddset switch"); |
331744e3 JD |
55 | } |
56 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_TEARDOWN); | |
57 | if (ret) { | |
d3e2ba59 JD |
58 | PERROR("sigaddset teardown"); |
59 | } | |
60 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_LIVE); | |
61 | if (ret) { | |
62 | PERROR("sigaddset live"); | |
331744e3 | 63 | } |
5383626c MD |
64 | ret = sigaddset(mask, LTTNG_CONSUMER_SIG_EXIT); |
65 | if (ret) { | |
66 | PERROR("sigaddset exit"); | |
67 | } | |
331744e3 JD |
68 | } |
69 | ||
70 | /* | |
71 | * Execute action on a timer switch. | |
d98a47c7 MD |
72 | * |
73 | * Beware: metadata_switch_timer() should *never* take a mutex also held | |
74 | * while consumer_timer_switch_stop() is called. It would result in | |
75 | * deadlocks. | |
331744e3 JD |
76 | */ |
77 | static void metadata_switch_timer(struct lttng_consumer_local_data *ctx, | |
78 | int sig, siginfo_t *si, void *uc) | |
79 | { | |
80 | int ret; | |
81 | struct lttng_consumer_channel *channel; | |
82 | ||
83 | channel = si->si_value.sival_ptr; | |
84 | assert(channel); | |
85 | ||
4419b4fb MD |
86 | if (channel->switch_timer_error) { |
87 | return; | |
88 | } | |
89 | ||
331744e3 JD |
90 | DBG("Switch timer for channel %" PRIu64, channel->key); |
91 | switch (ctx->type) { | |
92 | case LTTNG_CONSUMER32_UST: | |
93 | case LTTNG_CONSUMER64_UST: | |
4fa3dc0e MD |
94 | /* |
95 | * Locks taken by lttng_ustconsumer_request_metadata(): | |
96 | * - metadata_socket_lock | |
97 | * - Calling lttng_ustconsumer_recv_metadata(): | |
f82d9449 | 98 | * - channel->metadata_cache->lock |
4fa3dc0e | 99 | * - Calling consumer_metadata_cache_flushed(): |
5e41ebe1 MD |
100 | * - channel->timer_lock |
101 | * - channel->metadata_cache->lock | |
4fa3dc0e | 102 | * |
5e41ebe1 MD |
103 | * Ensure that neither consumer_data.lock nor |
104 | * channel->lock are taken within this function, since | |
105 | * they are held while consumer_timer_switch_stop() is | |
106 | * called. | |
4fa3dc0e | 107 | */ |
94d49140 | 108 | ret = lttng_ustconsumer_request_metadata(ctx, channel, 1, 1); |
331744e3 | 109 | if (ret < 0) { |
4419b4fb | 110 | channel->switch_timer_error = 1; |
331744e3 JD |
111 | } |
112 | break; | |
113 | case LTTNG_CONSUMER_KERNEL: | |
114 | case LTTNG_CONSUMER_UNKNOWN: | |
115 | assert(0); | |
116 | break; | |
117 | } | |
118 | } | |
119 | ||
528f2ffa JD |
120 | static int send_empty_index(struct lttng_consumer_stream *stream, uint64_t ts, |
121 | uint64_t stream_id) | |
d3e2ba59 JD |
122 | { |
123 | int ret; | |
50adc264 | 124 | struct ctf_packet_index index; |
d3e2ba59 JD |
125 | |
126 | memset(&index, 0, sizeof(index)); | |
528f2ffa | 127 | index.stream_id = htobe64(stream_id); |
d3e2ba59 JD |
128 | index.timestamp_end = htobe64(ts); |
129 | ret = consumer_stream_write_index(stream, &index); | |
130 | if (ret < 0) { | |
131 | goto error; | |
132 | } | |
133 | ||
134 | error: | |
135 | return ret; | |
136 | } | |
137 | ||
c585821b | 138 | int consumer_flush_kernel_index(struct lttng_consumer_stream *stream) |
d3e2ba59 | 139 | { |
528f2ffa | 140 | uint64_t ts, stream_id; |
d3e2ba59 JD |
141 | int ret; |
142 | ||
d3e2ba59 JD |
143 | ret = kernctl_get_current_timestamp(stream->wait_fd, &ts); |
144 | if (ret < 0) { | |
145 | ERR("Failed to get the current timestamp"); | |
c585821b | 146 | goto end; |
d3e2ba59 JD |
147 | } |
148 | ret = kernctl_buffer_flush(stream->wait_fd); | |
149 | if (ret < 0) { | |
150 | ERR("Failed to flush kernel stream"); | |
c585821b | 151 | goto end; |
d3e2ba59 JD |
152 | } |
153 | ret = kernctl_snapshot(stream->wait_fd); | |
154 | if (ret < 0) { | |
32af2c95 | 155 | if (ret != -EAGAIN && ret != -ENODATA) { |
08b1dcd3 | 156 | PERROR("live timer kernel snapshot"); |
d3e2ba59 | 157 | ret = -1; |
c585821b | 158 | goto end; |
d3e2ba59 | 159 | } |
528f2ffa JD |
160 | ret = kernctl_get_stream_id(stream->wait_fd, &stream_id); |
161 | if (ret < 0) { | |
162 | PERROR("kernctl_get_stream_id"); | |
c585821b | 163 | goto end; |
528f2ffa | 164 | } |
d3e2ba59 | 165 | DBG("Stream %" PRIu64 " empty, sending beacon", stream->key); |
528f2ffa | 166 | ret = send_empty_index(stream, ts, stream_id); |
d3e2ba59 | 167 | if (ret < 0) { |
c585821b | 168 | goto end; |
d3e2ba59 JD |
169 | } |
170 | } | |
171 | ret = 0; | |
c585821b | 172 | end: |
d3e2ba59 JD |
173 | return ret; |
174 | } | |
175 | ||
c585821b | 176 | static int check_kernel_stream(struct lttng_consumer_stream *stream) |
d3e2ba59 | 177 | { |
d3e2ba59 JD |
178 | int ret; |
179 | ||
d3e2ba59 JD |
180 | /* |
181 | * While holding the stream mutex, try to take a snapshot, if it | |
182 | * succeeds, it means that data is ready to be sent, just let the data | |
183 | * thread handle that. Otherwise, if the snapshot returns EAGAIN, it | |
184 | * means that there is no data to read after the flush, so we can | |
185 | * safely send the empty index. | |
c585821b MD |
186 | * |
187 | * Doing a trylock and checking if waiting on metadata if | |
188 | * trylock fails. Bail out of the stream is indeed waiting for | |
189 | * metadata to be pushed. Busy wait on trylock otherwise. | |
d3e2ba59 | 190 | */ |
c585821b MD |
191 | for (;;) { |
192 | ret = pthread_mutex_trylock(&stream->lock); | |
193 | switch (ret) { | |
194 | case 0: | |
195 | break; /* We have the lock. */ | |
196 | case EBUSY: | |
197 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
198 | if (stream->waiting_on_metadata) { | |
199 | ret = 0; | |
200 | stream->missed_metadata_flush = true; | |
201 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
202 | goto end; /* Bail out. */ | |
203 | } | |
204 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
205 | /* Try again. */ | |
206 | caa_cpu_relax(); | |
207 | continue; | |
208 | default: | |
209 | ERR("Unexpected pthread_mutex_trylock error %d", ret); | |
210 | ret = -1; | |
211 | goto end; | |
212 | } | |
213 | break; | |
214 | } | |
215 | ret = consumer_flush_kernel_index(stream); | |
216 | pthread_mutex_unlock(&stream->lock); | |
217 | end: | |
218 | return ret; | |
219 | } | |
220 | ||
221 | int consumer_flush_ust_index(struct lttng_consumer_stream *stream) | |
222 | { | |
223 | uint64_t ts, stream_id; | |
224 | int ret; | |
225 | ||
94d49140 JD |
226 | ret = cds_lfht_is_node_deleted(&stream->node.node); |
227 | if (ret) { | |
c585821b | 228 | goto end; |
94d49140 JD |
229 | } |
230 | ||
84a182ce | 231 | ret = lttng_ustconsumer_get_current_timestamp(stream, &ts); |
d3e2ba59 JD |
232 | if (ret < 0) { |
233 | ERR("Failed to get the current timestamp"); | |
c585821b | 234 | goto end; |
d3e2ba59 | 235 | } |
84a182ce DG |
236 | lttng_ustconsumer_flush_buffer(stream, 1); |
237 | ret = lttng_ustconsumer_take_snapshot(stream); | |
d3e2ba59 | 238 | if (ret < 0) { |
94d49140 | 239 | if (ret != -EAGAIN) { |
d3e2ba59 JD |
240 | ERR("Taking UST snapshot"); |
241 | ret = -1; | |
c585821b | 242 | goto end; |
d3e2ba59 | 243 | } |
70190e1c | 244 | ret = lttng_ustconsumer_get_stream_id(stream, &stream_id); |
528f2ffa JD |
245 | if (ret < 0) { |
246 | PERROR("ustctl_get_stream_id"); | |
c585821b | 247 | goto end; |
528f2ffa | 248 | } |
d3e2ba59 | 249 | DBG("Stream %" PRIu64 " empty, sending beacon", stream->key); |
528f2ffa | 250 | ret = send_empty_index(stream, ts, stream_id); |
d3e2ba59 | 251 | if (ret < 0) { |
c585821b | 252 | goto end; |
d3e2ba59 JD |
253 | } |
254 | } | |
255 | ret = 0; | |
c585821b MD |
256 | end: |
257 | return ret; | |
258 | } | |
d3e2ba59 | 259 | |
c585821b MD |
260 | static int check_ust_stream(struct lttng_consumer_stream *stream) |
261 | { | |
262 | int ret; | |
263 | ||
264 | assert(stream); | |
265 | assert(stream->ustream); | |
266 | /* | |
267 | * While holding the stream mutex, try to take a snapshot, if it | |
268 | * succeeds, it means that data is ready to be sent, just let the data | |
269 | * thread handle that. Otherwise, if the snapshot returns EAGAIN, it | |
270 | * means that there is no data to read after the flush, so we can | |
271 | * safely send the empty index. | |
272 | * | |
273 | * Doing a trylock and checking if waiting on metadata if | |
274 | * trylock fails. Bail out of the stream is indeed waiting for | |
275 | * metadata to be pushed. Busy wait on trylock otherwise. | |
276 | */ | |
277 | for (;;) { | |
278 | ret = pthread_mutex_trylock(&stream->lock); | |
279 | switch (ret) { | |
280 | case 0: | |
281 | break; /* We have the lock. */ | |
282 | case EBUSY: | |
283 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
284 | if (stream->waiting_on_metadata) { | |
285 | ret = 0; | |
286 | stream->missed_metadata_flush = true; | |
287 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
288 | goto end; /* Bail out. */ | |
289 | } | |
290 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
291 | /* Try again. */ | |
292 | caa_cpu_relax(); | |
293 | continue; | |
294 | default: | |
295 | ERR("Unexpected pthread_mutex_trylock error %d", ret); | |
296 | ret = -1; | |
297 | goto end; | |
298 | } | |
299 | break; | |
300 | } | |
301 | ret = consumer_flush_ust_index(stream); | |
d3e2ba59 | 302 | pthread_mutex_unlock(&stream->lock); |
c585821b | 303 | end: |
d3e2ba59 JD |
304 | return ret; |
305 | } | |
306 | ||
307 | /* | |
308 | * Execute action on a live timer | |
309 | */ | |
310 | static void live_timer(struct lttng_consumer_local_data *ctx, | |
311 | int sig, siginfo_t *si, void *uc) | |
312 | { | |
313 | int ret; | |
314 | struct lttng_consumer_channel *channel; | |
315 | struct lttng_consumer_stream *stream; | |
316 | struct lttng_ht *ht; | |
317 | struct lttng_ht_iter iter; | |
318 | ||
319 | channel = si->si_value.sival_ptr; | |
320 | assert(channel); | |
321 | ||
322 | if (channel->switch_timer_error) { | |
323 | goto error; | |
324 | } | |
325 | ht = consumer_data.stream_per_chan_id_ht; | |
326 | ||
327 | DBG("Live timer for channel %" PRIu64, channel->key); | |
328 | ||
329 | rcu_read_lock(); | |
330 | switch (ctx->type) { | |
331 | case LTTNG_CONSUMER32_UST: | |
332 | case LTTNG_CONSUMER64_UST: | |
333 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
334 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
335 | ht->match_fct, &channel->key, &iter.iter, | |
336 | stream, node_channel_id.node) { | |
337 | ret = check_ust_stream(stream); | |
338 | if (ret < 0) { | |
339 | goto error_unlock; | |
340 | } | |
341 | } | |
342 | break; | |
343 | case LTTNG_CONSUMER_KERNEL: | |
344 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
345 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
346 | ht->match_fct, &channel->key, &iter.iter, | |
347 | stream, node_channel_id.node) { | |
348 | ret = check_kernel_stream(stream); | |
349 | if (ret < 0) { | |
350 | goto error_unlock; | |
351 | } | |
352 | } | |
353 | break; | |
354 | case LTTNG_CONSUMER_UNKNOWN: | |
355 | assert(0); | |
356 | break; | |
357 | } | |
358 | ||
359 | error_unlock: | |
360 | rcu_read_unlock(); | |
361 | ||
362 | error: | |
363 | return; | |
364 | } | |
365 | ||
2b8f8754 MD |
366 | static |
367 | void consumer_timer_signal_thread_qs(unsigned int signr) | |
368 | { | |
369 | sigset_t pending_set; | |
370 | int ret; | |
371 | ||
372 | /* | |
373 | * We need to be the only thread interacting with the thread | |
374 | * that manages signals for teardown synchronization. | |
375 | */ | |
376 | pthread_mutex_lock(&timer_signal.lock); | |
377 | ||
378 | /* Ensure we don't have any signal queued for this channel. */ | |
379 | for (;;) { | |
380 | ret = sigemptyset(&pending_set); | |
381 | if (ret == -1) { | |
382 | PERROR("sigemptyset"); | |
383 | } | |
384 | ret = sigpending(&pending_set); | |
385 | if (ret == -1) { | |
386 | PERROR("sigpending"); | |
387 | } | |
6f7cc0be | 388 | if (!sigismember(&pending_set, signr)) { |
2b8f8754 MD |
389 | break; |
390 | } | |
391 | caa_cpu_relax(); | |
392 | } | |
393 | ||
394 | /* | |
395 | * From this point, no new signal handler will be fired that would try to | |
396 | * access "chan". However, we still need to wait for any currently | |
397 | * executing handler to complete. | |
398 | */ | |
399 | cmm_smp_mb(); | |
400 | CMM_STORE_SHARED(timer_signal.qs_done, 0); | |
401 | cmm_smp_mb(); | |
402 | ||
403 | /* | |
404 | * Kill with LTTNG_CONSUMER_SIG_TEARDOWN, so signal management thread wakes | |
405 | * up. | |
406 | */ | |
407 | kill(getpid(), LTTNG_CONSUMER_SIG_TEARDOWN); | |
408 | ||
409 | while (!CMM_LOAD_SHARED(timer_signal.qs_done)) { | |
410 | caa_cpu_relax(); | |
411 | } | |
412 | cmm_smp_mb(); | |
413 | ||
414 | pthread_mutex_unlock(&timer_signal.lock); | |
415 | } | |
416 | ||
331744e3 JD |
417 | /* |
418 | * Set the timer for periodical metadata flush. | |
419 | */ | |
420 | void consumer_timer_switch_start(struct lttng_consumer_channel *channel, | |
421 | unsigned int switch_timer_interval) | |
422 | { | |
423 | int ret; | |
424 | struct sigevent sev; | |
425 | struct itimerspec its; | |
426 | ||
427 | assert(channel); | |
428 | assert(channel->key); | |
429 | ||
430 | if (switch_timer_interval == 0) { | |
431 | return; | |
432 | } | |
433 | ||
434 | sev.sigev_notify = SIGEV_SIGNAL; | |
435 | sev.sigev_signo = LTTNG_CONSUMER_SIG_SWITCH; | |
436 | sev.sigev_value.sival_ptr = channel; | |
437 | ret = timer_create(CLOCKID, &sev, &channel->switch_timer); | |
438 | if (ret == -1) { | |
439 | PERROR("timer_create"); | |
440 | } | |
441 | channel->switch_timer_enabled = 1; | |
442 | ||
443 | its.it_value.tv_sec = switch_timer_interval / 1000000; | |
69f60d21 | 444 | its.it_value.tv_nsec = (switch_timer_interval % 1000000) * 1000; |
331744e3 JD |
445 | its.it_interval.tv_sec = its.it_value.tv_sec; |
446 | its.it_interval.tv_nsec = its.it_value.tv_nsec; | |
447 | ||
448 | ret = timer_settime(channel->switch_timer, 0, &its, NULL); | |
449 | if (ret == -1) { | |
450 | PERROR("timer_settime"); | |
451 | } | |
452 | } | |
453 | ||
454 | /* | |
455 | * Stop and delete timer. | |
456 | */ | |
457 | void consumer_timer_switch_stop(struct lttng_consumer_channel *channel) | |
458 | { | |
459 | int ret; | |
331744e3 JD |
460 | |
461 | assert(channel); | |
462 | ||
463 | ret = timer_delete(channel->switch_timer); | |
464 | if (ret == -1) { | |
465 | PERROR("timer_delete"); | |
466 | } | |
467 | ||
2b8f8754 | 468 | consumer_timer_signal_thread_qs(LTTNG_CONSUMER_SIG_SWITCH); |
331744e3 | 469 | |
2b8f8754 MD |
470 | channel->switch_timer = 0; |
471 | channel->switch_timer_enabled = 0; | |
331744e3 JD |
472 | } |
473 | ||
d3e2ba59 JD |
474 | /* |
475 | * Set the timer for the live mode. | |
476 | */ | |
477 | void consumer_timer_live_start(struct lttng_consumer_channel *channel, | |
478 | int live_timer_interval) | |
479 | { | |
480 | int ret; | |
481 | struct sigevent sev; | |
482 | struct itimerspec its; | |
483 | ||
484 | assert(channel); | |
485 | assert(channel->key); | |
486 | ||
fac41e72 | 487 | if (live_timer_interval <= 0) { |
d3e2ba59 JD |
488 | return; |
489 | } | |
490 | ||
491 | sev.sigev_notify = SIGEV_SIGNAL; | |
492 | sev.sigev_signo = LTTNG_CONSUMER_SIG_LIVE; | |
493 | sev.sigev_value.sival_ptr = channel; | |
494 | ret = timer_create(CLOCKID, &sev, &channel->live_timer); | |
495 | if (ret == -1) { | |
496 | PERROR("timer_create"); | |
497 | } | |
498 | channel->live_timer_enabled = 1; | |
499 | ||
500 | its.it_value.tv_sec = live_timer_interval / 1000000; | |
69f60d21 | 501 | its.it_value.tv_nsec = (live_timer_interval % 1000000) * 1000; |
d3e2ba59 JD |
502 | its.it_interval.tv_sec = its.it_value.tv_sec; |
503 | its.it_interval.tv_nsec = its.it_value.tv_nsec; | |
504 | ||
505 | ret = timer_settime(channel->live_timer, 0, &its, NULL); | |
506 | if (ret == -1) { | |
507 | PERROR("timer_settime"); | |
508 | } | |
509 | } | |
510 | ||
511 | /* | |
512 | * Stop and delete timer. | |
513 | */ | |
514 | void consumer_timer_live_stop(struct lttng_consumer_channel *channel) | |
515 | { | |
516 | int ret; | |
517 | ||
518 | assert(channel); | |
519 | ||
520 | ret = timer_delete(channel->live_timer); | |
521 | if (ret == -1) { | |
522 | PERROR("timer_delete"); | |
523 | } | |
524 | ||
525 | consumer_timer_signal_thread_qs(LTTNG_CONSUMER_SIG_LIVE); | |
526 | ||
527 | channel->live_timer = 0; | |
528 | channel->live_timer_enabled = 0; | |
529 | } | |
530 | ||
331744e3 JD |
531 | /* |
532 | * Block the RT signals for the entire process. It must be called from the | |
533 | * consumer main before creating the threads | |
534 | */ | |
73664f81 | 535 | int consumer_signal_init(void) |
331744e3 JD |
536 | { |
537 | int ret; | |
538 | sigset_t mask; | |
539 | ||
540 | /* Block signal for entire process, so only our thread processes it. */ | |
541 | setmask(&mask); | |
542 | ret = pthread_sigmask(SIG_BLOCK, &mask, NULL); | |
543 | if (ret) { | |
544 | errno = ret; | |
545 | PERROR("pthread_sigmask"); | |
73664f81 | 546 | return -1; |
331744e3 | 547 | } |
73664f81 | 548 | return 0; |
331744e3 JD |
549 | } |
550 | ||
551 | /* | |
d3e2ba59 | 552 | * This thread is the sighandler for signals LTTNG_CONSUMER_SIG_SWITCH, |
5383626c MD |
553 | * LTTNG_CONSUMER_SIG_TEARDOWN, LTTNG_CONSUMER_SIG_LIVE, and |
554 | * LTTNG_CONSUMER_SIG_EXIT. | |
331744e3 | 555 | */ |
d3e2ba59 | 556 | void *consumer_timer_thread(void *data) |
331744e3 JD |
557 | { |
558 | int signr; | |
559 | sigset_t mask; | |
560 | siginfo_t info; | |
561 | struct lttng_consumer_local_data *ctx = data; | |
562 | ||
8a9acb74 MD |
563 | rcu_register_thread(); |
564 | ||
1fc79fb4 MD |
565 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_METADATA_TIMER); |
566 | ||
2d57de81 MD |
567 | if (testpoint(consumerd_thread_metadata_timer)) { |
568 | goto error_testpoint; | |
569 | } | |
570 | ||
9ce5646a MD |
571 | health_code_update(); |
572 | ||
331744e3 JD |
573 | /* Only self thread will receive signal mask. */ |
574 | setmask(&mask); | |
575 | CMM_STORE_SHARED(timer_signal.tid, pthread_self()); | |
576 | ||
577 | while (1) { | |
9ce5646a MD |
578 | health_code_update(); |
579 | ||
580 | health_poll_entry(); | |
331744e3 | 581 | signr = sigwaitinfo(&mask, &info); |
9ce5646a | 582 | health_poll_exit(); |
331744e3 JD |
583 | if (signr == -1) { |
584 | if (errno != EINTR) { | |
585 | PERROR("sigwaitinfo"); | |
586 | } | |
587 | continue; | |
588 | } else if (signr == LTTNG_CONSUMER_SIG_SWITCH) { | |
589 | metadata_switch_timer(ctx, info.si_signo, &info, NULL); | |
590 | } else if (signr == LTTNG_CONSUMER_SIG_TEARDOWN) { | |
591 | cmm_smp_mb(); | |
592 | CMM_STORE_SHARED(timer_signal.qs_done, 1); | |
593 | cmm_smp_mb(); | |
594 | DBG("Signal timer metadata thread teardown"); | |
d3e2ba59 JD |
595 | } else if (signr == LTTNG_CONSUMER_SIG_LIVE) { |
596 | live_timer(ctx, info.si_signo, &info, NULL); | |
5383626c MD |
597 | } else if (signr == LTTNG_CONSUMER_SIG_EXIT) { |
598 | assert(consumer_quit); | |
599 | goto end; | |
331744e3 JD |
600 | } else { |
601 | ERR("Unexpected signal %d\n", info.si_signo); | |
602 | } | |
603 | } | |
604 | ||
2d57de81 MD |
605 | error_testpoint: |
606 | /* Only reached in testpoint error */ | |
607 | health_error(); | |
5383626c | 608 | end: |
1fc79fb4 | 609 | health_unregister(health_consumerd); |
8a9acb74 | 610 | rcu_unregister_thread(); |
331744e3 JD |
611 | return NULL; |
612 | } |