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ab0ee2ca JG |
1 | /* |
2 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License, version 2 only, as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., 51 | |
15 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | */ | |
17 | ||
18 | #define _LGPL_SOURCE | |
19 | #include <lttng/trigger/trigger.h> | |
20 | #include <lttng/notification/channel-internal.h> | |
21 | #include <lttng/notification/notification-internal.h> | |
22 | #include <lttng/condition/condition-internal.h> | |
23 | #include <lttng/condition/buffer-usage-internal.h> | |
24 | #include <common/error.h> | |
25 | #include <common/config/session-config.h> | |
26 | #include <common/defaults.h> | |
27 | #include <common/utils.h> | |
ab0ee2ca JG |
28 | #include <common/align.h> |
29 | #include <common/time.h> | |
30 | #include <sys/eventfd.h> | |
31 | #include <sys/stat.h> | |
32 | #include <time.h> | |
33 | #include <signal.h> | |
34 | ||
35 | #include "notification-thread.h" | |
36 | #include "notification-thread-events.h" | |
37 | #include "notification-thread-commands.h" | |
38 | #include "lttng-sessiond.h" | |
39 | #include "health-sessiond.h" | |
40 | ||
41 | #include <urcu.h> | |
42 | #include <urcu/list.h> | |
43 | #include <urcu/rculfhash.h> | |
44 | ||
ab0ee2ca JG |
45 | /* |
46 | * Destroy the thread data previously created by the init function. | |
47 | */ | |
48 | void notification_thread_handle_destroy( | |
49 | struct notification_thread_handle *handle) | |
50 | { | |
51 | int ret; | |
ab0ee2ca JG |
52 | |
53 | if (!handle) { | |
54 | goto end; | |
55 | } | |
56 | ||
8ada111f | 57 | assert(cds_list_empty(&handle->cmd_queue.list)); |
ab0ee2ca JG |
58 | pthread_mutex_destroy(&handle->cmd_queue.lock); |
59 | ||
814b4934 JR |
60 | if (handle->cmd_queue.event_pipe) { |
61 | lttng_pipe_destroy(handle->cmd_queue.event_pipe); | |
62 | } | |
ab0ee2ca JG |
63 | if (handle->channel_monitoring_pipes.ust32_consumer >= 0) { |
64 | ret = close(handle->channel_monitoring_pipes.ust32_consumer); | |
65 | if (ret) { | |
66 | PERROR("close 32-bit consumer channel monitoring pipe"); | |
67 | } | |
68 | } | |
69 | if (handle->channel_monitoring_pipes.ust64_consumer >= 0) { | |
70 | ret = close(handle->channel_monitoring_pipes.ust64_consumer); | |
71 | if (ret) { | |
72 | PERROR("close 64-bit consumer channel monitoring pipe"); | |
73 | } | |
74 | } | |
75 | if (handle->channel_monitoring_pipes.kernel_consumer >= 0) { | |
76 | ret = close(handle->channel_monitoring_pipes.kernel_consumer); | |
77 | if (ret) { | |
78 | PERROR("close kernel consumer channel monitoring pipe"); | |
79 | } | |
80 | } | |
81 | end: | |
82 | free(handle); | |
83 | } | |
84 | ||
85 | struct notification_thread_handle *notification_thread_handle_create( | |
86 | struct lttng_pipe *ust32_channel_monitor_pipe, | |
87 | struct lttng_pipe *ust64_channel_monitor_pipe, | |
90936dcf JD |
88 | struct lttng_pipe *kernel_channel_monitor_pipe, |
89 | sem_t *notification_thread_ready) | |
ab0ee2ca JG |
90 | { |
91 | int ret; | |
92 | struct notification_thread_handle *handle; | |
814b4934 | 93 | struct lttng_pipe *event_pipe = NULL; |
ab0ee2ca JG |
94 | |
95 | handle = zmalloc(sizeof(*handle)); | |
96 | if (!handle) { | |
97 | goto end; | |
98 | } | |
99 | ||
18d08850 | 100 | event_pipe = lttng_pipe_open(FD_CLOEXEC); |
814b4934 JR |
101 | if (!event_pipe) { |
102 | ERR("event_pipe creation"); | |
ab0ee2ca JG |
103 | goto error; |
104 | } | |
814b4934 JR |
105 | |
106 | handle->cmd_queue.event_pipe = event_pipe; | |
107 | event_pipe = NULL; | |
108 | ||
ab0ee2ca JG |
109 | CDS_INIT_LIST_HEAD(&handle->cmd_queue.list); |
110 | ret = pthread_mutex_init(&handle->cmd_queue.lock, NULL); | |
111 | if (ret) { | |
112 | goto error; | |
113 | } | |
114 | ||
115 | if (ust32_channel_monitor_pipe) { | |
116 | handle->channel_monitoring_pipes.ust32_consumer = | |
117 | lttng_pipe_release_readfd( | |
118 | ust32_channel_monitor_pipe); | |
119 | if (handle->channel_monitoring_pipes.ust32_consumer < 0) { | |
120 | goto error; | |
121 | } | |
122 | } else { | |
123 | handle->channel_monitoring_pipes.ust32_consumer = -1; | |
124 | } | |
125 | if (ust64_channel_monitor_pipe) { | |
126 | handle->channel_monitoring_pipes.ust64_consumer = | |
127 | lttng_pipe_release_readfd( | |
128 | ust64_channel_monitor_pipe); | |
129 | if (handle->channel_monitoring_pipes.ust64_consumer < 0) { | |
130 | goto error; | |
131 | } | |
132 | } else { | |
133 | handle->channel_monitoring_pipes.ust64_consumer = -1; | |
134 | } | |
135 | if (kernel_channel_monitor_pipe) { | |
136 | handle->channel_monitoring_pipes.kernel_consumer = | |
137 | lttng_pipe_release_readfd( | |
138 | kernel_channel_monitor_pipe); | |
139 | if (handle->channel_monitoring_pipes.kernel_consumer < 0) { | |
140 | goto error; | |
141 | } | |
142 | } else { | |
143 | handle->channel_monitoring_pipes.kernel_consumer = -1; | |
144 | } | |
90936dcf | 145 | handle->notification_thread_ready = notification_thread_ready; |
ab0ee2ca JG |
146 | end: |
147 | return handle; | |
148 | error: | |
814b4934 | 149 | lttng_pipe_destroy(event_pipe); |
ab0ee2ca JG |
150 | notification_thread_handle_destroy(handle); |
151 | return NULL; | |
152 | } | |
153 | ||
154 | static | |
155 | char *get_notification_channel_sock_path(void) | |
156 | { | |
157 | int ret; | |
158 | bool is_root = !getuid(); | |
159 | char *sock_path; | |
160 | ||
161 | sock_path = zmalloc(LTTNG_PATH_MAX); | |
162 | if (!sock_path) { | |
163 | goto error; | |
164 | } | |
165 | ||
166 | if (is_root) { | |
167 | ret = snprintf(sock_path, LTTNG_PATH_MAX, | |
168 | DEFAULT_GLOBAL_NOTIFICATION_CHANNEL_UNIX_SOCK); | |
169 | if (ret < 0) { | |
170 | goto error; | |
171 | } | |
172 | } else { | |
173 | char *home_path = utils_get_home_dir(); | |
174 | ||
175 | if (!home_path) { | |
176 | ERR("Can't get HOME directory for socket creation"); | |
177 | goto error; | |
178 | } | |
179 | ||
180 | ret = snprintf(sock_path, LTTNG_PATH_MAX, | |
181 | DEFAULT_HOME_NOTIFICATION_CHANNEL_UNIX_SOCK, | |
182 | home_path); | |
183 | if (ret < 0) { | |
184 | goto error; | |
185 | } | |
186 | } | |
187 | ||
188 | return sock_path; | |
189 | error: | |
190 | free(sock_path); | |
191 | return NULL; | |
192 | } | |
193 | ||
194 | static | |
195 | void notification_channel_socket_destroy(int fd) | |
196 | { | |
197 | int ret; | |
198 | char *sock_path = get_notification_channel_sock_path(); | |
199 | ||
200 | DBG("[notification-thread] Destroying notification channel socket"); | |
201 | ||
202 | if (sock_path) { | |
203 | ret = unlink(sock_path); | |
204 | free(sock_path); | |
205 | if (ret < 0) { | |
206 | PERROR("unlink notification channel socket"); | |
207 | } | |
208 | } | |
209 | ||
210 | ret = close(fd); | |
211 | if (ret) { | |
212 | PERROR("close notification channel socket"); | |
213 | } | |
214 | } | |
215 | ||
216 | static | |
217 | int notification_channel_socket_create(void) | |
218 | { | |
219 | int fd = -1, ret; | |
220 | char *sock_path = get_notification_channel_sock_path(); | |
221 | ||
222 | DBG("[notification-thread] Creating notification channel UNIX socket at %s", | |
223 | sock_path); | |
224 | ||
225 | ret = lttcomm_create_unix_sock(sock_path); | |
226 | if (ret < 0) { | |
227 | ERR("[notification-thread] Failed to create notification socket"); | |
228 | goto error; | |
229 | } | |
230 | fd = ret; | |
231 | ||
232 | ret = chmod(sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
233 | if (ret < 0) { | |
234 | ERR("Set file permissions failed: %s", sock_path); | |
235 | PERROR("chmod notification channel socket"); | |
236 | goto error; | |
237 | } | |
238 | ||
239 | if (getuid() == 0) { | |
240 | ret = chown(sock_path, 0, | |
e6142f2e | 241 | utils_get_group_id(config.tracing_group_name.value)); |
ab0ee2ca JG |
242 | if (ret) { |
243 | ERR("Failed to set the notification channel socket's group"); | |
244 | ret = -1; | |
245 | goto error; | |
246 | } | |
247 | } | |
248 | ||
249 | DBG("[notification-thread] Notification channel UNIX socket created (fd = %i)", | |
250 | fd); | |
251 | free(sock_path); | |
252 | return fd; | |
253 | error: | |
254 | if (fd >= 0 && close(fd) < 0) { | |
255 | PERROR("close notification channel socket"); | |
256 | } | |
257 | free(sock_path); | |
258 | return ret; | |
259 | } | |
260 | ||
261 | static | |
262 | int init_poll_set(struct lttng_poll_event *poll_set, | |
263 | struct notification_thread_handle *handle, | |
264 | int notification_channel_socket) | |
265 | { | |
266 | int ret; | |
267 | ||
268 | /* | |
269 | * Create pollset with size 5: | |
270 | * - notification channel socket (listen for new connections), | |
271 | * - command queue event fd (internal sessiond commands), | |
272 | * - consumerd (32-bit user space) channel monitor pipe, | |
273 | * - consumerd (64-bit user space) channel monitor pipe, | |
274 | * - consumerd (kernel) channel monitor pipe. | |
275 | */ | |
276 | ret = lttng_poll_create(poll_set, 5, LTTNG_CLOEXEC); | |
277 | if (ret < 0) { | |
278 | goto end; | |
279 | } | |
280 | ||
281 | ret = lttng_poll_add(poll_set, notification_channel_socket, | |
282 | LPOLLIN | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
283 | if (ret < 0) { | |
284 | ERR("[notification-thread] Failed to add notification channel socket to pollset"); | |
285 | goto error; | |
286 | } | |
814b4934 | 287 | ret = lttng_poll_add(poll_set, lttng_pipe_get_readfd(handle->cmd_queue.event_pipe), |
ab0ee2ca JG |
288 | LPOLLIN | LPOLLERR); |
289 | if (ret < 0) { | |
290 | ERR("[notification-thread] Failed to add notification command queue event fd to pollset"); | |
291 | goto error; | |
292 | } | |
293 | ret = lttng_poll_add(poll_set, | |
294 | handle->channel_monitoring_pipes.ust32_consumer, | |
295 | LPOLLIN | LPOLLERR); | |
296 | if (ret < 0) { | |
297 | ERR("[notification-thread] Failed to add ust-32 channel monitoring pipe fd to pollset"); | |
298 | goto error; | |
299 | } | |
300 | ret = lttng_poll_add(poll_set, | |
301 | handle->channel_monitoring_pipes.ust64_consumer, | |
302 | LPOLLIN | LPOLLERR); | |
303 | if (ret < 0) { | |
304 | ERR("[notification-thread] Failed to add ust-64 channel monitoring pipe fd to pollset"); | |
305 | goto error; | |
306 | } | |
307 | if (handle->channel_monitoring_pipes.kernel_consumer < 0) { | |
308 | goto end; | |
309 | } | |
310 | ret = lttng_poll_add(poll_set, | |
311 | handle->channel_monitoring_pipes.kernel_consumer, | |
312 | LPOLLIN | LPOLLERR); | |
313 | if (ret < 0) { | |
314 | ERR("[notification-thread] Failed to add kernel channel monitoring pipe fd to pollset"); | |
315 | goto error; | |
316 | } | |
317 | end: | |
318 | return ret; | |
319 | error: | |
320 | lttng_poll_clean(poll_set); | |
321 | return ret; | |
322 | } | |
323 | ||
324 | static | |
325 | void fini_thread_state(struct notification_thread_state *state) | |
326 | { | |
327 | int ret; | |
328 | ||
329 | if (state->client_socket_ht) { | |
330 | ret = handle_notification_thread_client_disconnect_all(state); | |
331 | assert(!ret); | |
332 | ret = cds_lfht_destroy(state->client_socket_ht, NULL); | |
333 | assert(!ret); | |
334 | } | |
335 | if (state->triggers_ht) { | |
336 | ret = handle_notification_thread_trigger_unregister_all(state); | |
337 | assert(!ret); | |
338 | ret = cds_lfht_destroy(state->triggers_ht, NULL); | |
339 | assert(!ret); | |
340 | } | |
341 | if (state->channel_triggers_ht) { | |
342 | ret = cds_lfht_destroy(state->channel_triggers_ht, NULL); | |
343 | assert(!ret); | |
344 | } | |
345 | if (state->channel_state_ht) { | |
346 | ret = cds_lfht_destroy(state->channel_state_ht, NULL); | |
347 | assert(!ret); | |
348 | } | |
349 | if (state->notification_trigger_clients_ht) { | |
350 | ret = cds_lfht_destroy(state->notification_trigger_clients_ht, | |
351 | NULL); | |
352 | assert(!ret); | |
353 | } | |
354 | if (state->channels_ht) { | |
8abe313a JG |
355 | ret = cds_lfht_destroy(state->channels_ht, NULL); |
356 | assert(!ret); | |
357 | } | |
358 | if (state->sessions_ht) { | |
359 | ret = cds_lfht_destroy(state->sessions_ht, NULL); | |
ab0ee2ca JG |
360 | assert(!ret); |
361 | } | |
ab0ee2ca JG |
362 | if (state->notification_channel_socket >= 0) { |
363 | notification_channel_socket_destroy( | |
364 | state->notification_channel_socket); | |
365 | } | |
366 | lttng_poll_clean(&state->events); | |
367 | } | |
368 | ||
369 | static | |
370 | int init_thread_state(struct notification_thread_handle *handle, | |
371 | struct notification_thread_state *state) | |
372 | { | |
373 | int ret; | |
374 | ||
375 | memset(state, 0, sizeof(*state)); | |
376 | state->notification_channel_socket = -1; | |
377 | lttng_poll_init(&state->events); | |
378 | ||
379 | ret = notification_channel_socket_create(); | |
380 | if (ret < 0) { | |
381 | goto end; | |
382 | } | |
383 | state->notification_channel_socket = ret; | |
384 | ||
385 | ret = init_poll_set(&state->events, handle, | |
386 | state->notification_channel_socket); | |
387 | if (ret) { | |
388 | goto end; | |
389 | } | |
390 | ||
391 | DBG("[notification-thread] Listening on notification channel socket"); | |
392 | ret = lttcomm_listen_unix_sock(state->notification_channel_socket); | |
393 | if (ret < 0) { | |
394 | ERR("[notification-thread] Listen failed on notification channel socket"); | |
395 | goto error; | |
396 | } | |
397 | ||
398 | state->client_socket_ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0, | |
399 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
400 | if (!state->client_socket_ht) { | |
401 | goto error; | |
402 | } | |
403 | ||
404 | state->channel_triggers_ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0, | |
405 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
406 | if (!state->channel_triggers_ht) { | |
407 | goto error; | |
408 | } | |
409 | ||
410 | state->channel_state_ht = cds_lfht_new(DEFAULT_HT_SIZE, 1, 0, | |
411 | CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
412 | if (!state->channel_state_ht) { | |
413 | goto error; | |
414 | } | |
415 | ||
416 | state->notification_trigger_clients_ht = cds_lfht_new(DEFAULT_HT_SIZE, | |
417 | 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
418 | if (!state->notification_trigger_clients_ht) { | |
419 | goto error; | |
420 | } | |
421 | ||
422 | state->channels_ht = cds_lfht_new(DEFAULT_HT_SIZE, | |
423 | 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
424 | if (!state->channels_ht) { | |
425 | goto error; | |
426 | } | |
8abe313a JG |
427 | state->sessions_ht = cds_lfht_new(DEFAULT_HT_SIZE, |
428 | 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
429 | if (!state->sessions_ht) { | |
430 | goto error; | |
431 | } | |
ab0ee2ca JG |
432 | state->triggers_ht = cds_lfht_new(DEFAULT_HT_SIZE, |
433 | 1, 0, CDS_LFHT_AUTO_RESIZE | CDS_LFHT_ACCOUNTING, NULL); | |
434 | if (!state->triggers_ht) { | |
435 | goto error; | |
436 | } | |
90936dcf | 437 | sem_post(handle->notification_thread_ready); |
ab0ee2ca JG |
438 | end: |
439 | return 0; | |
440 | error: | |
441 | fini_thread_state(state); | |
442 | return -1; | |
443 | } | |
444 | ||
445 | static | |
446 | int handle_channel_monitoring_pipe(int fd, uint32_t revents, | |
447 | struct notification_thread_handle *handle, | |
448 | struct notification_thread_state *state) | |
449 | { | |
450 | int ret = 0; | |
451 | enum lttng_domain_type domain; | |
452 | ||
453 | if (fd == handle->channel_monitoring_pipes.ust32_consumer || | |
454 | fd == handle->channel_monitoring_pipes.ust64_consumer) { | |
455 | domain = LTTNG_DOMAIN_UST; | |
456 | } else if (fd == handle->channel_monitoring_pipes.kernel_consumer) { | |
457 | domain = LTTNG_DOMAIN_KERNEL; | |
458 | } else { | |
459 | abort(); | |
460 | } | |
461 | ||
462 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
463 | ret = lttng_poll_del(&state->events, fd); | |
464 | if (ret) { | |
465 | ERR("[notification-thread] Failed to remove consumer monitoring pipe from poll set"); | |
466 | } | |
467 | goto end; | |
468 | } | |
469 | ||
470 | ret = handle_notification_thread_channel_sample( | |
471 | state, fd, domain); | |
472 | if (ret) { | |
4149ace8 | 473 | ERR("[notification-thread] Consumer sample handling error occurred"); |
ab0ee2ca JG |
474 | ret = -1; |
475 | goto end; | |
476 | } | |
477 | end: | |
478 | return ret; | |
479 | } | |
480 | ||
481 | /* | |
482 | * This thread services notification channel clients and commands received | |
483 | * from various lttng-sessiond components over a command queue. | |
484 | */ | |
485 | void *thread_notification(void *data) | |
486 | { | |
487 | int ret; | |
488 | struct notification_thread_handle *handle = data; | |
489 | struct notification_thread_state state; | |
490 | ||
491 | DBG("[notification-thread] Started notification thread"); | |
492 | ||
493 | if (!handle) { | |
494 | ERR("[notification-thread] Invalid thread context provided"); | |
495 | goto end; | |
496 | } | |
497 | ||
498 | rcu_register_thread(); | |
499 | rcu_thread_online(); | |
500 | ||
501 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_NOTIFICATION); | |
502 | health_code_update(); | |
503 | ||
504 | ret = init_thread_state(handle, &state); | |
505 | if (ret) { | |
506 | goto end; | |
507 | } | |
508 | ||
509 | /* Ready to handle client connections. */ | |
510 | sessiond_notify_ready(); | |
511 | ||
512 | while (true) { | |
513 | int fd_count, i; | |
514 | ||
515 | health_poll_entry(); | |
516 | DBG("[notification-thread] Entering poll wait"); | |
517 | ret = lttng_poll_wait(&state.events, -1); | |
518 | DBG("[notification-thread] Poll wait returned (%i)", ret); | |
519 | health_poll_exit(); | |
520 | if (ret < 0) { | |
521 | /* | |
522 | * Restart interrupted system call. | |
523 | */ | |
524 | if (errno == EINTR) { | |
525 | continue; | |
526 | } | |
527 | ERR("[notification-thread] Error encountered during lttng_poll_wait (%i)", ret); | |
528 | goto error; | |
529 | } | |
530 | ||
531 | fd_count = ret; | |
532 | for (i = 0; i < fd_count; i++) { | |
533 | int fd = LTTNG_POLL_GETFD(&state.events, i); | |
534 | uint32_t revents = LTTNG_POLL_GETEV(&state.events, i); | |
535 | ||
2d01d977 JG |
536 | if (!revents) { |
537 | continue; | |
538 | } | |
ab0ee2ca JG |
539 | DBG("[notification-thread] Handling fd (%i) activity (%u)", fd, revents); |
540 | ||
541 | if (fd == state.notification_channel_socket) { | |
542 | if (revents & LPOLLIN) { | |
543 | ret = handle_notification_thread_client_connect( | |
544 | &state); | |
545 | if (ret < 0) { | |
546 | goto error; | |
547 | } | |
548 | } else if (revents & | |
549 | (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
550 | ERR("[notification-thread] Notification socket poll error"); | |
551 | goto error; | |
552 | } else { | |
553 | ERR("[notification-thread] Unexpected poll events %u for notification socket %i", revents, fd); | |
554 | goto error; | |
555 | } | |
814b4934 | 556 | } else if (fd == lttng_pipe_get_readfd(handle->cmd_queue.event_pipe)) { |
ab0ee2ca JG |
557 | ret = handle_notification_thread_command(handle, |
558 | &state); | |
559 | if (ret < 0) { | |
560 | DBG("[notification-thread] Error encountered while servicing command queue"); | |
561 | goto error; | |
562 | } else if (ret > 0) { | |
563 | goto exit; | |
564 | } | |
565 | } else if (fd == handle->channel_monitoring_pipes.ust32_consumer || | |
566 | fd == handle->channel_monitoring_pipes.ust64_consumer || | |
567 | fd == handle->channel_monitoring_pipes.kernel_consumer) { | |
568 | ret = handle_channel_monitoring_pipe(fd, | |
569 | revents, handle, &state); | |
570 | if (ret) { | |
571 | goto error; | |
572 | } | |
573 | } else { | |
574 | /* Activity on a client's socket. */ | |
575 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
576 | /* | |
577 | * It doesn't matter if a command was | |
578 | * pending on the client socket at this | |
579 | * point since it now has no way to | |
580 | * receive the notifications to which | |
581 | * it was subscribing or unsubscribing. | |
582 | */ | |
583 | ret = handle_notification_thread_client_disconnect( | |
584 | fd, &state); | |
585 | if (ret) { | |
586 | goto error; | |
587 | } | |
588 | } else { | |
589 | if (revents & LPOLLIN) { | |
590 | ret = handle_notification_thread_client_in( | |
591 | &state, fd); | |
592 | if (ret) { | |
593 | goto error; | |
594 | } | |
595 | } | |
596 | ||
597 | if (revents & LPOLLOUT) { | |
598 | ret = handle_notification_thread_client_out( | |
599 | &state, fd); | |
600 | if (ret) { | |
601 | goto error; | |
602 | } | |
603 | } | |
604 | } | |
605 | } | |
606 | } | |
607 | } | |
608 | exit: | |
609 | error: | |
610 | fini_thread_state(&state); | |
611 | health_unregister(health_sessiond); | |
612 | rcu_thread_offline(); | |
613 | rcu_unregister_thread(); | |
614 | end: | |
615 | return NULL; | |
616 | } |