Commit | Line | Data |
---|---|---|
db66e574 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2017 Julien Desfossez <jdesfossez@efficios.com> |
3 | * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
db66e574 | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
db66e574 | 6 | * |
db66e574 JD |
7 | */ |
8 | ||
9 | #define _LGPL_SOURCE | |
10 | #include <lttng/trigger/trigger.h> | |
c9e313bc SM |
11 | #include <common/error.hpp> |
12 | #include <common/config/session-config.hpp> | |
13 | #include <common/defaults.hpp> | |
14 | #include <common/utils.hpp> | |
15 | #include <common/futex.hpp> | |
16 | #include <common/align.hpp> | |
17 | #include <common/time.hpp> | |
18 | #include <common/hashtable/utils.hpp> | |
db66e574 JD |
19 | #include <sys/stat.h> |
20 | #include <time.h> | |
21 | #include <signal.h> | |
22 | #include <inttypes.h> | |
23 | ||
c9e313bc SM |
24 | #include <common/kernel-ctl/kernel-ctl.hpp> |
25 | #include <lttng/notification/channel-internal.hpp> | |
26 | #include <lttng/rotate-internal.hpp> | |
27 | #include <lttng/location-internal.hpp> | |
28 | #include <lttng/condition/condition-internal.hpp> | |
db66e574 | 29 | |
c9e313bc SM |
30 | #include "rotation-thread.hpp" |
31 | #include "lttng-sessiond.hpp" | |
32 | #include "health-sessiond.hpp" | |
33 | #include "rotate.hpp" | |
34 | #include "cmd.hpp" | |
35 | #include "session.hpp" | |
36 | #include "timer.hpp" | |
37 | #include "notification-thread-commands.hpp" | |
38 | #include "utils.hpp" | |
39 | #include "thread.hpp" | |
db66e574 JD |
40 | |
41 | #include <urcu.h> | |
42 | #include <urcu/list.h> | |
db66e574 | 43 | |
90936dcf JD |
44 | struct lttng_notification_channel *rotate_notification_channel = NULL; |
45 | ||
92816cc3 | 46 | struct rotation_thread { |
db66e574 JD |
47 | struct lttng_poll_event events; |
48 | }; | |
49 | ||
92816cc3 JG |
50 | /* |
51 | * The timer thread enqueues jobs and wakes up the rotation thread. | |
52 | * When the rotation thread wakes up, it empties the queue. | |
53 | */ | |
54 | struct rotation_thread_timer_queue { | |
55 | struct lttng_pipe *event_pipe; | |
56 | struct cds_list_head list; | |
57 | pthread_mutex_t lock; | |
58 | }; | |
59 | ||
60 | struct rotation_thread_handle { | |
92816cc3 JG |
61 | struct rotation_thread_timer_queue *rotation_timer_queue; |
62 | /* Access to the notification thread cmd_queue */ | |
63 | struct notification_thread_handle *notification_thread_handle; | |
64d9b072 JG |
64 | /* Thread-specific quit pipe. */ |
65 | struct lttng_pipe *quit_pipe; | |
92816cc3 JG |
66 | }; |
67 | ||
f1494934 JG |
68 | namespace { |
69 | struct rotation_thread_job { | |
70 | enum rotation_thread_job_type type; | |
71 | struct ltt_session *session; | |
72 | /* List member in struct rotation_thread_timer_queue. */ | |
73 | struct cds_list_head head; | |
74 | }; | |
75 | } /* namespace */ | |
76 | ||
db66e574 | 77 | static |
92816cc3 | 78 | const char *get_job_type_str(enum rotation_thread_job_type job_type) |
db66e574 | 79 | { |
92816cc3 JG |
80 | switch (job_type) { |
81 | case ROTATION_THREAD_JOB_TYPE_CHECK_PENDING_ROTATION: | |
82 | return "CHECK_PENDING_ROTATION"; | |
83 | case ROTATION_THREAD_JOB_TYPE_SCHEDULED_ROTATION: | |
84 | return "SCHEDULED_ROTATION"; | |
85 | default: | |
86 | abort(); | |
87 | } | |
db66e574 JD |
88 | } |
89 | ||
92816cc3 | 90 | struct rotation_thread_timer_queue *rotation_thread_timer_queue_create(void) |
db66e574 | 91 | { |
92816cc3 | 92 | struct rotation_thread_timer_queue *queue = NULL; |
db66e574 | 93 | |
64803277 | 94 | queue = zmalloc<rotation_thread_timer_queue>(); |
92816cc3 JG |
95 | if (!queue) { |
96 | PERROR("Failed to allocate timer rotate queue"); | |
97 | goto end; | |
98 | } | |
db66e574 | 99 | |
92816cc3 JG |
100 | queue->event_pipe = lttng_pipe_open(FD_CLOEXEC | O_NONBLOCK); |
101 | CDS_INIT_LIST_HEAD(&queue->list); | |
102 | pthread_mutex_init(&queue->lock, NULL); | |
103 | end: | |
104 | return queue; | |
db66e574 JD |
105 | } |
106 | ||
92816cc3 JG |
107 | void rotation_thread_timer_queue_destroy( |
108 | struct rotation_thread_timer_queue *queue) | |
db66e574 | 109 | { |
92816cc3 JG |
110 | if (!queue) { |
111 | return; | |
db66e574 JD |
112 | } |
113 | ||
92816cc3 JG |
114 | lttng_pipe_destroy(queue->event_pipe); |
115 | ||
116 | pthread_mutex_lock(&queue->lock); | |
a0377dfe | 117 | LTTNG_ASSERT(cds_list_empty(&queue->list)); |
92816cc3 JG |
118 | pthread_mutex_unlock(&queue->lock); |
119 | pthread_mutex_destroy(&queue->lock); | |
120 | free(queue); | |
121 | } | |
db66e574 | 122 | |
92816cc3 JG |
123 | /* |
124 | * Destroy the thread data previously created by the init function. | |
125 | */ | |
126 | void rotation_thread_handle_destroy( | |
127 | struct rotation_thread_handle *handle) | |
128 | { | |
64d9b072 | 129 | lttng_pipe_destroy(handle->quit_pipe); |
db66e574 JD |
130 | free(handle); |
131 | } | |
132 | ||
133 | struct rotation_thread_handle *rotation_thread_handle_create( | |
90936dcf | 134 | struct rotation_thread_timer_queue *rotation_timer_queue, |
c8a9de5a | 135 | struct notification_thread_handle *notification_thread_handle) |
db66e574 JD |
136 | { |
137 | struct rotation_thread_handle *handle; | |
138 | ||
64803277 | 139 | handle = zmalloc<rotation_thread_handle>(); |
db66e574 JD |
140 | if (!handle) { |
141 | goto end; | |
142 | } | |
143 | ||
92816cc3 JG |
144 | handle->rotation_timer_queue = rotation_timer_queue; |
145 | handle->notification_thread_handle = notification_thread_handle; | |
64d9b072 JG |
146 | handle->quit_pipe = lttng_pipe_open(FD_CLOEXEC); |
147 | if (!handle->quit_pipe) { | |
148 | goto error; | |
149 | } | |
92816cc3 JG |
150 | |
151 | end: | |
152 | return handle; | |
64d9b072 JG |
153 | error: |
154 | rotation_thread_handle_destroy(handle); | |
155 | return NULL; | |
92816cc3 JG |
156 | } |
157 | ||
158 | /* | |
159 | * Called with the rotation_thread_timer_queue lock held. | |
160 | * Return true if the same timer job already exists in the queue, false if not. | |
161 | */ | |
162 | static | |
163 | bool timer_job_exists(const struct rotation_thread_timer_queue *queue, | |
c7031a2c JG |
164 | enum rotation_thread_job_type job_type, |
165 | struct ltt_session *session) | |
92816cc3 JG |
166 | { |
167 | bool exists = false; | |
168 | struct rotation_thread_job *job; | |
169 | ||
170 | cds_list_for_each_entry(job, &queue->list, head) { | |
c7031a2c | 171 | if (job->session == session && job->type == job_type) { |
92816cc3 JG |
172 | exists = true; |
173 | goto end; | |
db66e574 | 174 | } |
db66e574 | 175 | } |
92816cc3 JG |
176 | end: |
177 | return exists; | |
178 | } | |
179 | ||
180 | void rotation_thread_enqueue_job(struct rotation_thread_timer_queue *queue, | |
c7031a2c JG |
181 | enum rotation_thread_job_type job_type, |
182 | struct ltt_session *session) | |
92816cc3 JG |
183 | { |
184 | int ret; | |
be2956e7 | 185 | const char dummy = '!'; |
92816cc3 JG |
186 | struct rotation_thread_job *job = NULL; |
187 | const char *job_type_str = get_job_type_str(job_type); | |
188 | ||
189 | pthread_mutex_lock(&queue->lock); | |
c7031a2c | 190 | if (timer_job_exists(queue, job_type, session)) { |
92816cc3 JG |
191 | /* |
192 | * This timer job is already pending, we don't need to add | |
193 | * it. | |
194 | */ | |
195 | goto end; | |
db66e574 | 196 | } |
92816cc3 | 197 | |
64803277 | 198 | job = zmalloc<rotation_thread_job>(); |
92816cc3 | 199 | if (!job) { |
c7031a2c JG |
200 | PERROR("Failed to allocate rotation thread job of type \"%s\" for session \"%s\"", |
201 | job_type_str, session->name); | |
92816cc3 JG |
202 | goto end; |
203 | } | |
c7031a2c JG |
204 | /* No reason for this to fail as the caller must hold a reference. */ |
205 | (void) session_get(session); | |
206 | ||
207 | job->session = session; | |
92816cc3 | 208 | job->type = job_type; |
92816cc3 JG |
209 | cds_list_add_tail(&job->head, &queue->list); |
210 | ||
be2956e7 JG |
211 | ret = lttng_write(lttng_pipe_get_writefd(queue->event_pipe), &dummy, |
212 | sizeof(dummy)); | |
92816cc3 JG |
213 | if (ret < 0) { |
214 | /* | |
215 | * We do not want to block in the timer handler, the job has | |
216 | * been enqueued in the list, the wakeup pipe is probably full, | |
217 | * the job will be processed when the rotation_thread catches | |
218 | * up. | |
219 | */ | |
942003e5 MJ |
220 | DIAGNOSTIC_PUSH |
221 | DIAGNOSTIC_IGNORE_LOGICAL_OP | |
92816cc3 | 222 | if (errno == EAGAIN || errno == EWOULDBLOCK) { |
942003e5 | 223 | DIAGNOSTIC_POP |
92816cc3 JG |
224 | /* |
225 | * Not an error, but would be surprising and indicate | |
226 | * that the rotation thread can't keep up with the | |
227 | * current load. | |
228 | */ | |
229 | DBG("Wake-up pipe of rotation thread job queue is full"); | |
230 | goto end; | |
db66e574 | 231 | } |
c7031a2c JG |
232 | PERROR("Failed to wake-up the rotation thread after pushing a job of type \"%s\" for session \"%s\"", |
233 | job_type_str, session->name); | |
92816cc3 | 234 | goto end; |
db66e574 | 235 | } |
db66e574 JD |
236 | |
237 | end: | |
92816cc3 | 238 | pthread_mutex_unlock(&queue->lock); |
db66e574 JD |
239 | } |
240 | ||
241 | static | |
242 | int init_poll_set(struct lttng_poll_event *poll_set, | |
243 | struct rotation_thread_handle *handle) | |
244 | { | |
245 | int ret; | |
246 | ||
247 | /* | |
64d9b072 JG |
248 | * Create pollset with size 3: |
249 | * - rotation thread quit pipe, | |
92816cc3 | 250 | * - rotation thread timer queue pipe, |
64d9b072 | 251 | * - notification channel sock, |
db66e574 | 252 | */ |
64d9b072 JG |
253 | ret = lttng_poll_create(poll_set, 5, LTTNG_CLOEXEC); |
254 | if (ret < 0) { | |
db66e574 JD |
255 | goto error; |
256 | } | |
64d9b072 JG |
257 | |
258 | ret = lttng_poll_add(poll_set, | |
259 | lttng_pipe_get_readfd(handle->quit_pipe), | |
260 | LPOLLIN | LPOLLERR); | |
261 | if (ret < 0) { | |
bd0514a5 | 262 | ERR("Failed to add quit pipe read fd to poll set"); |
64d9b072 JG |
263 | goto error; |
264 | } | |
265 | ||
d086f507 JD |
266 | ret = lttng_poll_add(poll_set, |
267 | lttng_pipe_get_readfd(handle->rotation_timer_queue->event_pipe), | |
268 | LPOLLIN | LPOLLERR); | |
269 | if (ret < 0) { | |
bd0514a5 | 270 | ERR("Failed to add rotate_pending fd to poll set"); |
d086f507 JD |
271 | goto error; |
272 | } | |
db66e574 | 273 | |
db66e574 JD |
274 | return ret; |
275 | error: | |
276 | lttng_poll_clean(poll_set); | |
277 | return ret; | |
278 | } | |
279 | ||
280 | static | |
92816cc3 | 281 | void fini_thread_state(struct rotation_thread *state) |
db66e574 JD |
282 | { |
283 | lttng_poll_clean(&state->events); | |
90936dcf JD |
284 | if (rotate_notification_channel) { |
285 | lttng_notification_channel_destroy(rotate_notification_channel); | |
286 | } | |
db66e574 JD |
287 | } |
288 | ||
289 | static | |
290 | int init_thread_state(struct rotation_thread_handle *handle, | |
92816cc3 | 291 | struct rotation_thread *state) |
db66e574 JD |
292 | { |
293 | int ret; | |
294 | ||
295 | memset(state, 0, sizeof(*state)); | |
296 | lttng_poll_init(&state->events); | |
297 | ||
298 | ret = init_poll_set(&state->events, handle); | |
299 | if (ret) { | |
bd0514a5 | 300 | ERR("Failed to initialize rotation thread poll set"); |
db66e574 JD |
301 | goto end; |
302 | } | |
303 | ||
90936dcf JD |
304 | rotate_notification_channel = lttng_notification_channel_create( |
305 | lttng_session_daemon_notification_endpoint); | |
306 | if (!rotate_notification_channel) { | |
bd0514a5 | 307 | ERR("Could not create notification channel"); |
90936dcf JD |
308 | ret = -1; |
309 | goto end; | |
310 | } | |
311 | ret = lttng_poll_add(&state->events, rotate_notification_channel->socket, | |
312 | LPOLLIN | LPOLLERR); | |
313 | if (ret < 0) { | |
bd0514a5 | 314 | ERR("Failed to add notification fd to pollset"); |
90936dcf JD |
315 | goto end; |
316 | } | |
317 | ||
db66e574 JD |
318 | end: |
319 | return ret; | |
320 | } | |
321 | ||
322 | static | |
d2956687 JG |
323 | void check_session_rotation_pending_on_consumers(struct ltt_session *session, |
324 | bool *_rotation_completed) | |
92816cc3 | 325 | { |
db582e11 | 326 | int ret = 0; |
92816cc3 JG |
327 | struct consumer_socket *socket; |
328 | struct cds_lfht_iter iter; | |
d2956687 JG |
329 | enum consumer_trace_chunk_exists_status exists_status; |
330 | uint64_t relayd_id; | |
331 | bool chunk_exists_on_peer = false; | |
332 | enum lttng_trace_chunk_status chunk_status; | |
333 | ||
a0377dfe | 334 | LTTNG_ASSERT(session->chunk_being_archived); |
92816cc3 JG |
335 | |
336 | /* | |
337 | * Check for a local pending rotation on all consumers (32-bit | |
338 | * user space, 64-bit user space, and kernel). | |
339 | */ | |
92816cc3 JG |
340 | rcu_read_lock(); |
341 | if (!session->ust_session) { | |
342 | goto skip_ust; | |
343 | } | |
344 | cds_lfht_for_each_entry(session->ust_session->consumer->socks->ht, | |
345 | &iter, socket, node.node) { | |
d2956687 JG |
346 | relayd_id = session->ust_session->consumer->type == CONSUMER_DST_LOCAL ? |
347 | -1ULL : | |
348 | session->ust_session->consumer->net_seq_index; | |
349 | ||
350 | pthread_mutex_lock(socket->lock); | |
351 | ret = consumer_trace_chunk_exists(socket, | |
352 | relayd_id, | |
353 | session->id, session->chunk_being_archived, | |
354 | &exists_status); | |
355 | if (ret) { | |
356 | pthread_mutex_unlock(socket->lock); | |
83ed9e90 | 357 | ERR("Error occurred while checking rotation status on consumer daemon"); |
92816cc3 | 358 | goto end; |
db66e574 | 359 | } |
d2956687 | 360 | |
16100d7a | 361 | if (exists_status != CONSUMER_TRACE_CHUNK_EXISTS_STATUS_UNKNOWN_CHUNK) { |
d2956687 JG |
362 | pthread_mutex_unlock(socket->lock); |
363 | chunk_exists_on_peer = true; | |
364 | goto end; | |
16100d7a | 365 | } |
d2956687 | 366 | pthread_mutex_unlock(socket->lock); |
16100d7a | 367 | } |
db66e574 | 368 | |
92816cc3 JG |
369 | skip_ust: |
370 | if (!session->kernel_session) { | |
371 | goto skip_kernel; | |
db66e574 | 372 | } |
92816cc3 JG |
373 | cds_lfht_for_each_entry(session->kernel_session->consumer->socks->ht, |
374 | &iter, socket, node.node) { | |
d2956687 JG |
375 | pthread_mutex_lock(socket->lock); |
376 | relayd_id = session->kernel_session->consumer->type == CONSUMER_DST_LOCAL ? | |
377 | -1ULL : | |
378 | session->kernel_session->consumer->net_seq_index; | |
379 | ||
380 | ret = consumer_trace_chunk_exists(socket, | |
381 | relayd_id, | |
382 | session->id, session->chunk_being_archived, | |
383 | &exists_status); | |
384 | if (ret) { | |
385 | pthread_mutex_unlock(socket->lock); | |
83ed9e90 | 386 | ERR("Error occurred while checking rotation status on consumer daemon"); |
92816cc3 JG |
387 | goto end; |
388 | } | |
d2956687 | 389 | |
16100d7a | 390 | if (exists_status != CONSUMER_TRACE_CHUNK_EXISTS_STATUS_UNKNOWN_CHUNK) { |
d2956687 JG |
391 | pthread_mutex_unlock(socket->lock); |
392 | chunk_exists_on_peer = true; | |
393 | goto end; | |
16100d7a | 394 | } |
d2956687 | 395 | pthread_mutex_unlock(socket->lock); |
92816cc3 JG |
396 | } |
397 | skip_kernel: | |
398 | end: | |
399 | rcu_read_unlock(); | |
db66e574 | 400 | |
d2956687 JG |
401 | if (!chunk_exists_on_peer) { |
402 | uint64_t chunk_being_archived_id; | |
403 | ||
404 | chunk_status = lttng_trace_chunk_get_id( | |
405 | session->chunk_being_archived, | |
406 | &chunk_being_archived_id); | |
a0377dfe | 407 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
bd0514a5 | 408 | DBG("Rotation of trace archive %" PRIu64 " of session \"%s\" is complete on all consumers", |
d2956687 | 409 | chunk_being_archived_id, |
92816cc3 | 410 | session->name); |
db66e574 | 411 | } |
d2956687 | 412 | *_rotation_completed = !chunk_exists_on_peer; |
92816cc3 | 413 | if (ret) { |
2961f09e JG |
414 | ret = session_reset_rotation_state(session, |
415 | LTTNG_ROTATION_STATE_ERROR); | |
416 | if (ret) { | |
417 | ERR("Failed to reset rotation state of session \"%s\"", | |
418 | session->name); | |
419 | } | |
db66e574 | 420 | } |
db66e574 JD |
421 | } |
422 | ||
d88744a4 | 423 | /* |
92816cc3 | 424 | * Check if the last rotation was completed, called with session lock held. |
d2956687 JG |
425 | * Should only return non-zero in the event of a fatal error. Doing so will |
426 | * shutdown the thread. | |
d88744a4 JD |
427 | */ |
428 | static | |
92816cc3 JG |
429 | int check_session_rotation_pending(struct ltt_session *session, |
430 | struct notification_thread_handle *notification_thread_handle) | |
d88744a4 JD |
431 | { |
432 | int ret; | |
92816cc3 | 433 | struct lttng_trace_archive_location *location; |
d2956687 JG |
434 | enum lttng_trace_chunk_status chunk_status; |
435 | bool rotation_completed = false; | |
436 | const char *archived_chunk_name; | |
437 | uint64_t chunk_being_archived_id; | |
438 | ||
dc1d5967 FD |
439 | if (!session->chunk_being_archived) { |
440 | ret = 0; | |
441 | goto end; | |
442 | } | |
443 | ||
d2956687 JG |
444 | chunk_status = lttng_trace_chunk_get_id(session->chunk_being_archived, |
445 | &chunk_being_archived_id); | |
a0377dfe | 446 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
d88744a4 | 447 | |
bd0514a5 | 448 | DBG("Checking for pending rotation on session \"%s\", trace archive %" PRIu64, |
d2956687 JG |
449 | session->name, chunk_being_archived_id); |
450 | ||
faf1bdcf JG |
451 | /* |
452 | * The rotation-pending check timer of a session is launched in | |
453 | * one-shot mode. If the rotation is incomplete, the rotation | |
454 | * thread will re-enable the pending-check timer. | |
455 | * | |
456 | * The timer thread can't stop the timer itself since it is involved | |
457 | * in the check for the timer's quiescence. | |
458 | */ | |
459 | ret = timer_session_rotation_pending_check_stop(session); | |
460 | if (ret) { | |
6ae1bf46 | 461 | goto check_ongoing_rotation; |
faf1bdcf JG |
462 | } |
463 | ||
d2956687 JG |
464 | check_session_rotation_pending_on_consumers(session, |
465 | &rotation_completed); | |
d2956687 JG |
466 | if (!rotation_completed || |
467 | session->rotation_state == LTTNG_ROTATION_STATE_ERROR) { | |
6ae1bf46 | 468 | goto check_ongoing_rotation; |
92816cc3 JG |
469 | } |
470 | ||
92816cc3 JG |
471 | /* |
472 | * Now we can clear the "ONGOING" state in the session. New | |
473 | * rotations can start now. | |
474 | */ | |
d2956687 JG |
475 | chunk_status = lttng_trace_chunk_get_name(session->chunk_being_archived, |
476 | &archived_chunk_name, NULL); | |
a0377dfe | 477 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
d2956687 JG |
478 | free(session->last_archived_chunk_name); |
479 | session->last_archived_chunk_name = strdup(archived_chunk_name); | |
480 | if (!session->last_archived_chunk_name) { | |
481 | PERROR("Failed to duplicate archived chunk name"); | |
482 | } | |
483 | session_reset_rotation_state(session, LTTNG_ROTATION_STATE_COMPLETED); | |
92816cc3 | 484 | |
7fdbed1c JG |
485 | if (!session->quiet_rotation) { |
486 | location = session_get_trace_archive_location(session); | |
7fdbed1c JG |
487 | ret = notification_thread_command_session_rotation_completed( |
488 | notification_thread_handle, | |
489 | session->name, | |
490 | session->uid, | |
491 | session->gid, | |
492 | session->last_archived_chunk_id.value, | |
493 | location); | |
d3740619 | 494 | lttng_trace_archive_location_put(location); |
7fdbed1c | 495 | if (ret != LTTNG_OK) { |
bd0514a5 | 496 | ERR("Failed to notify notification thread of completed rotation for session %s", |
7fdbed1c JG |
497 | session->name); |
498 | } | |
92816cc3 JG |
499 | } |
500 | ||
501 | ret = 0; | |
6ae1bf46 | 502 | check_ongoing_rotation: |
92816cc3 | 503 | if (session->rotation_state == LTTNG_ROTATION_STATE_ONGOING) { |
d2956687 JG |
504 | chunk_status = lttng_trace_chunk_get_id( |
505 | session->chunk_being_archived, | |
506 | &chunk_being_archived_id); | |
a0377dfe | 507 | LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK); |
d2956687 | 508 | |
bd0514a5 | 509 | DBG("Rotation of trace archive %" PRIu64 " is still pending for session %s", |
d2956687 | 510 | chunk_being_archived_id, session->name); |
92816cc3 JG |
511 | ret = timer_session_rotation_pending_check_start(session, |
512 | DEFAULT_ROTATE_PENDING_TIMER); | |
513 | if (ret) { | |
d2956687 | 514 | ERR("Failed to re-enable rotation pending timer"); |
92816cc3 JG |
515 | ret = -1; |
516 | goto end; | |
517 | } | |
518 | } | |
519 | ||
6ae1bf46 | 520 | end: |
d88744a4 JD |
521 | return ret; |
522 | } | |
523 | ||
ed1e52a3 | 524 | /* Call with the session and session_list locks held. */ |
259c2674 | 525 | static |
92816cc3 | 526 | int launch_session_rotation(struct ltt_session *session) |
259c2674 JD |
527 | { |
528 | int ret; | |
92816cc3 | 529 | struct lttng_rotate_session_return rotation_return; |
259c2674 | 530 | |
bd0514a5 | 531 | DBG("Launching scheduled time-based rotation on session \"%s\"", |
92816cc3 | 532 | session->name); |
259c2674 | 533 | |
343defc2 MD |
534 | ret = cmd_rotate_session(session, &rotation_return, false, |
535 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
92816cc3 | 536 | if (ret == LTTNG_OK) { |
bd0514a5 | 537 | DBG("Scheduled time-based rotation successfully launched on session \"%s\"", |
92816cc3 JG |
538 | session->name); |
539 | } else { | |
540 | /* Don't consider errors as fatal. */ | |
bd0514a5 | 541 | DBG("Scheduled time-based rotation aborted for session %s: %s", |
92816cc3 | 542 | session->name, lttng_strerror(ret)); |
259c2674 | 543 | } |
92816cc3 JG |
544 | return 0; |
545 | } | |
259c2674 | 546 | |
92816cc3 JG |
547 | static |
548 | int run_job(struct rotation_thread_job *job, struct ltt_session *session, | |
549 | struct notification_thread_handle *notification_thread_handle) | |
550 | { | |
551 | int ret; | |
259c2674 | 552 | |
92816cc3 JG |
553 | switch (job->type) { |
554 | case ROTATION_THREAD_JOB_TYPE_SCHEDULED_ROTATION: | |
16100d7a | 555 | ret = launch_session_rotation(session); |
92816cc3 JG |
556 | break; |
557 | case ROTATION_THREAD_JOB_TYPE_CHECK_PENDING_ROTATION: | |
558 | ret = check_session_rotation_pending(session, | |
559 | notification_thread_handle); | |
560 | break; | |
561 | default: | |
562 | abort(); | |
259c2674 | 563 | } |
259c2674 JD |
564 | return ret; |
565 | } | |
566 | ||
d88744a4 | 567 | static |
92816cc3 | 568 | int handle_job_queue(struct rotation_thread_handle *handle, |
f46376a1 | 569 | struct rotation_thread *state __attribute__((unused)), |
d88744a4 JD |
570 | struct rotation_thread_timer_queue *queue) |
571 | { | |
572 | int ret = 0; | |
d88744a4 JD |
573 | |
574 | for (;;) { | |
e32d7f27 | 575 | struct ltt_session *session; |
92816cc3 | 576 | struct rotation_thread_job *job; |
d88744a4 | 577 | |
92816cc3 | 578 | /* Take the queue lock only to pop an element from the list. */ |
d88744a4 JD |
579 | pthread_mutex_lock(&queue->lock); |
580 | if (cds_list_empty(&queue->list)) { | |
581 | pthread_mutex_unlock(&queue->lock); | |
582 | break; | |
583 | } | |
92816cc3 JG |
584 | job = cds_list_first_entry(&queue->list, |
585 | typeof(*job), head); | |
586 | cds_list_del(&job->head); | |
d88744a4 JD |
587 | pthread_mutex_unlock(&queue->lock); |
588 | ||
d88744a4 | 589 | session_lock_list(); |
c7031a2c | 590 | session = job->session; |
d88744a4 | 591 | if (!session) { |
bd0514a5 | 592 | DBG("Session \"%s\" not found", |
739b8e17 | 593 | session->name != NULL ? session->name : ""); |
d88744a4 | 594 | /* |
92816cc3 JG |
595 | * This is a non-fatal error, and we cannot report it to |
596 | * the user (timer), so just print the error and | |
597 | * continue the processing. | |
598 | * | |
599 | * While the timer thread will purge pending signals for | |
600 | * a session on the session's destruction, it is | |
601 | * possible for a job targeting that session to have | |
602 | * already been queued before it was destroyed. | |
d88744a4 | 603 | */ |
92816cc3 | 604 | free(job); |
e32d7f27 | 605 | session_put(session); |
5b8139c6 | 606 | session_unlock_list(); |
d88744a4 JD |
607 | continue; |
608 | } | |
609 | ||
d88744a4 | 610 | session_lock(session); |
16100d7a | 611 | ret = run_job(job, session, handle->notification_thread_handle); |
d88744a4 | 612 | session_unlock(session); |
faf1bdcf | 613 | /* Release reference held by the job. */ |
e32d7f27 | 614 | session_put(session); |
ed1e52a3 | 615 | session_unlock_list(); |
92816cc3 | 616 | free(job); |
d88744a4 | 617 | if (ret) { |
d88744a4 JD |
618 | goto end; |
619 | } | |
620 | } | |
621 | ||
622 | ret = 0; | |
623 | ||
624 | end: | |
625 | return ret; | |
626 | } | |
627 | ||
92816cc3 JG |
628 | static |
629 | int handle_condition(const struct lttng_condition *condition, | |
90936dcf JD |
630 | const struct lttng_evaluation *evaluation, |
631 | struct notification_thread_handle *notification_thread_handle) | |
632 | { | |
633 | int ret = 0; | |
634 | const char *condition_session_name = NULL; | |
635 | enum lttng_condition_type condition_type; | |
636 | enum lttng_condition_status condition_status; | |
637 | enum lttng_evaluation_status evaluation_status; | |
638 | uint64_t consumed; | |
639 | struct ltt_session *session; | |
640 | ||
641 | condition_type = lttng_condition_get_type(condition); | |
642 | ||
643 | if (condition_type != LTTNG_CONDITION_TYPE_SESSION_CONSUMED_SIZE) { | |
644 | ret = -1; | |
bd0514a5 | 645 | ERR("Condition type and session usage type are not the same"); |
90936dcf JD |
646 | goto end; |
647 | } | |
648 | ||
649 | /* Fetch info to test */ | |
650 | condition_status = lttng_condition_session_consumed_size_get_session_name( | |
651 | condition, &condition_session_name); | |
652 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
bd0514a5 | 653 | ERR("Session name could not be fetched"); |
90936dcf JD |
654 | ret = -1; |
655 | goto end; | |
656 | } | |
657 | evaluation_status = lttng_evaluation_session_consumed_size_get_consumed_size(evaluation, | |
658 | &consumed); | |
659 | if (evaluation_status != LTTNG_EVALUATION_STATUS_OK) { | |
bd0514a5 | 660 | ERR("Failed to get evaluation"); |
90936dcf JD |
661 | ret = -1; |
662 | goto end; | |
663 | } | |
664 | ||
665 | session_lock_list(); | |
666 | session = session_find_by_name(condition_session_name); | |
667 | if (!session) { | |
eb2827a4 JG |
668 | DBG("Failed to find session while handling notification: notification type = %s, session name = `%s`", |
669 | lttng_condition_type_str(condition_type), | |
90936dcf | 670 | condition_session_name); |
eb2827a4 JG |
671 | /* |
672 | * Not a fatal error: a session can be destroyed before we get | |
673 | * the chance to handle the notification. | |
674 | */ | |
675 | ret = 0; | |
676 | session_unlock_list(); | |
90936dcf JD |
677 | goto end; |
678 | } | |
679 | session_lock(session); | |
90936dcf JD |
680 | |
681 | ret = unsubscribe_session_consumed_size_rotation(session, | |
682 | notification_thread_handle); | |
683 | if (ret) { | |
490b3229 | 684 | goto end_unlock; |
90936dcf JD |
685 | } |
686 | ||
343defc2 MD |
687 | ret = cmd_rotate_session(session, NULL, false, |
688 | LTTNG_TRACE_CHUNK_COMMAND_TYPE_MOVE_TO_COMPLETED); | |
90936dcf JD |
689 | if (ret == -LTTNG_ERR_ROTATION_PENDING) { |
690 | DBG("Rotate already pending, subscribe to the next threshold value"); | |
90936dcf | 691 | } else if (ret != LTTNG_OK) { |
bd0514a5 | 692 | ERR("Failed to rotate on size notification with error: %s", |
90936dcf JD |
693 | lttng_strerror(ret)); |
694 | ret = -1; | |
695 | goto end_unlock; | |
696 | } | |
697 | ret = subscribe_session_consumed_size_rotation(session, | |
698 | consumed + session->rotate_size, | |
699 | notification_thread_handle); | |
700 | if (ret) { | |
bd0514a5 | 701 | ERR("Failed to subscribe to session consumed size condition"); |
90936dcf JD |
702 | goto end_unlock; |
703 | } | |
704 | ret = 0; | |
705 | ||
706 | end_unlock: | |
707 | session_unlock(session); | |
e32d7f27 | 708 | session_put(session); |
5b8139c6 | 709 | session_unlock_list(); |
90936dcf JD |
710 | end: |
711 | return ret; | |
712 | } | |
713 | ||
714 | static | |
f46376a1 | 715 | int handle_notification_channel(int fd __attribute__((unused)), |
90936dcf | 716 | struct rotation_thread_handle *handle, |
f46376a1 | 717 | struct rotation_thread *state __attribute__((unused))) |
90936dcf JD |
718 | { |
719 | int ret; | |
d73ee93f JG |
720 | bool notification_pending; |
721 | struct lttng_notification *notification = NULL; | |
90936dcf JD |
722 | enum lttng_notification_channel_status status; |
723 | const struct lttng_evaluation *notification_evaluation; | |
724 | const struct lttng_condition *notification_condition; | |
725 | ||
d73ee93f JG |
726 | status = lttng_notification_channel_has_pending_notification( |
727 | rotate_notification_channel, ¬ification_pending); | |
728 | if (status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) { | |
bd0514a5 | 729 | ERR("Error occurred while checking for pending notification"); |
d73ee93f JG |
730 | ret = -1; |
731 | goto end; | |
732 | } | |
733 | ||
734 | if (!notification_pending) { | |
735 | ret = 0; | |
736 | goto end; | |
737 | } | |
738 | ||
90936dcf JD |
739 | /* Receive the next notification. */ |
740 | status = lttng_notification_channel_get_next_notification( | |
741 | rotate_notification_channel, | |
742 | ¬ification); | |
743 | ||
744 | switch (status) { | |
745 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK: | |
746 | break; | |
747 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED: | |
748 | /* Not an error, we will wait for the next one */ | |
749 | ret = 0; | |
750 | goto end;; | |
751 | case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED: | |
752 | ERR("Notification channel was closed"); | |
753 | ret = -1; | |
754 | goto end; | |
755 | default: | |
756 | /* Unhandled conditions / errors. */ | |
757 | ERR("Unknown notification channel status"); | |
758 | ret = -1; | |
759 | goto end; | |
760 | } | |
761 | ||
762 | notification_condition = lttng_notification_get_condition(notification); | |
763 | notification_evaluation = lttng_notification_get_evaluation(notification); | |
764 | ||
765 | ret = handle_condition(notification_condition, notification_evaluation, | |
766 | handle->notification_thread_handle); | |
767 | ||
768 | end: | |
769 | lttng_notification_destroy(notification); | |
90936dcf JD |
770 | return ret; |
771 | } | |
772 | ||
2c0c9bbc | 773 | static |
db66e574 JD |
774 | void *thread_rotation(void *data) |
775 | { | |
776 | int ret; | |
7966af57 | 777 | struct rotation_thread_handle *handle = (rotation_thread_handle *) data; |
92816cc3 | 778 | struct rotation_thread thread; |
87380d40 | 779 | int queue_pipe_fd; |
db66e574 | 780 | |
bd0514a5 | 781 | DBG("Started rotation thread"); |
f620cc28 JG |
782 | rcu_register_thread(); |
783 | rcu_thread_online(); | |
412d7227 | 784 | health_register(the_health_sessiond, HEALTH_SESSIOND_TYPE_ROTATION); |
f620cc28 | 785 | health_code_update(); |
db66e574 JD |
786 | |
787 | if (!handle) { | |
bd0514a5 | 788 | ERR("Invalid thread context provided"); |
db66e574 JD |
789 | goto end; |
790 | } | |
791 | ||
87380d40 JR |
792 | queue_pipe_fd = lttng_pipe_get_readfd( |
793 | handle->rotation_timer_queue->event_pipe); | |
794 | ||
db66e574 | 795 | |
92816cc3 | 796 | ret = init_thread_state(handle, &thread); |
db66e574 | 797 | if (ret) { |
f5f8e5cd | 798 | goto error; |
db66e574 JD |
799 | } |
800 | ||
db66e574 JD |
801 | while (true) { |
802 | int fd_count, i; | |
803 | ||
804 | health_poll_entry(); | |
bd0514a5 | 805 | DBG("Entering poll wait"); |
92816cc3 | 806 | ret = lttng_poll_wait(&thread.events, -1); |
bd0514a5 | 807 | DBG("Poll wait returned (%i)", ret); |
db66e574 JD |
808 | health_poll_exit(); |
809 | if (ret < 0) { | |
810 | /* | |
811 | * Restart interrupted system call. | |
812 | */ | |
813 | if (errno == EINTR) { | |
814 | continue; | |
815 | } | |
bd0514a5 | 816 | ERR("Error encountered during lttng_poll_wait (%i)", ret); |
db66e574 JD |
817 | goto error; |
818 | } | |
819 | ||
820 | fd_count = ret; | |
821 | for (i = 0; i < fd_count; i++) { | |
92816cc3 JG |
822 | int fd = LTTNG_POLL_GETFD(&thread.events, i); |
823 | uint32_t revents = LTTNG_POLL_GETEV(&thread.events, i); | |
db66e574 | 824 | |
bd0514a5 | 825 | DBG("Handling fd (%i) activity (%u)", |
db66e574 JD |
826 | fd, revents); |
827 | ||
92816cc3 | 828 | if (revents & LPOLLERR) { |
bd0514a5 | 829 | ERR("Polling returned an error on fd %i", fd); |
92816cc3 JG |
830 | goto error; |
831 | } | |
832 | ||
85e17b27 JG |
833 | if (fd == rotate_notification_channel->socket) { |
834 | ret = handle_notification_channel(fd, handle, | |
835 | &thread); | |
836 | if (ret) { | |
bd0514a5 | 837 | ERR("Error occurred while handling activity on notification channel socket"); |
85e17b27 JG |
838 | goto error; |
839 | } | |
840 | } else { | |
841 | /* Job queue or quit pipe activity. */ | |
85e17b27 JG |
842 | |
843 | /* | |
844 | * The job queue is serviced if there is | |
845 | * activity on the quit pipe to ensure it is | |
846 | * flushed and all references held in the queue | |
847 | * are released. | |
848 | */ | |
92816cc3 JG |
849 | ret = handle_job_queue(handle, &thread, |
850 | handle->rotation_timer_queue); | |
d88744a4 | 851 | if (ret) { |
bd0514a5 | 852 | ERR("Failed to handle rotation timer pipe event"); |
d88744a4 JD |
853 | goto error; |
854 | } | |
85e17b27 | 855 | |
64d9b072 JG |
856 | if (fd == queue_pipe_fd) { |
857 | char buf; | |
858 | ||
859 | ret = lttng_read(fd, &buf, 1); | |
860 | if (ret != 1) { | |
bd0514a5 | 861 | ERR("Failed to read from wakeup pipe (fd = %i)", fd); |
64d9b072 JG |
862 | goto error; |
863 | } | |
864 | } else { | |
bd0514a5 | 865 | DBG("Quit pipe activity"); |
85e17b27 | 866 | goto exit; |
90936dcf | 867 | } |
db66e574 JD |
868 | } |
869 | } | |
870 | } | |
871 | exit: | |
872 | error: | |
bd0514a5 | 873 | DBG("Thread exit"); |
92816cc3 | 874 | fini_thread_state(&thread); |
f620cc28 | 875 | end: |
412d7227 | 876 | health_unregister(the_health_sessiond); |
03732c32 JG |
877 | rcu_thread_offline(); |
878 | rcu_unregister_thread(); | |
db66e574 JD |
879 | return NULL; |
880 | } | |
64d9b072 JG |
881 | |
882 | static | |
883 | bool shutdown_rotation_thread(void *thread_data) | |
884 | { | |
7966af57 | 885 | struct rotation_thread_handle *handle = (rotation_thread_handle *) thread_data; |
64d9b072 JG |
886 | const int write_fd = lttng_pipe_get_writefd(handle->quit_pipe); |
887 | ||
888 | return notify_thread_pipe(write_fd) == 1; | |
889 | } | |
890 | ||
891 | bool launch_rotation_thread(struct rotation_thread_handle *handle) | |
892 | { | |
893 | struct lttng_thread *thread; | |
894 | ||
895 | thread = lttng_thread_create("Rotation", | |
896 | thread_rotation, | |
897 | shutdown_rotation_thread, | |
898 | NULL, | |
899 | handle); | |
900 | if (!thread) { | |
901 | goto error; | |
902 | } | |
903 | lttng_thread_put(thread); | |
904 | return true; | |
905 | error: | |
906 | return false; | |
907 | } |