Commit | Line | Data |
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3bd1e081 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
00e2e675 | 4 | * 2012 - David Goulet <dgoulet@efficios.com> |
3bd1e081 | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
3bd1e081 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, but WITHOUT |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
3bd1e081 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
3bd1e081 MD |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
3bd1e081 | 21 | #include <assert.h> |
3bd1e081 MD |
22 | #include <poll.h> |
23 | #include <pthread.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/mman.h> | |
27 | #include <sys/socket.h> | |
28 | #include <sys/types.h> | |
29 | #include <unistd.h> | |
77c7c900 | 30 | #include <inttypes.h> |
331744e3 | 31 | #include <signal.h> |
3bd1e081 | 32 | |
51a9e1c7 | 33 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 34 | #include <common/common.h> |
fb3a43a9 | 35 | #include <common/utils.h> |
d2956687 | 36 | #include <common/time.h> |
fb3a43a9 | 37 | #include <common/compat/poll.h> |
f263b7fd | 38 | #include <common/compat/endian.h> |
309167d2 | 39 | #include <common/index/index.h> |
10a8a223 | 40 | #include <common/kernel-ctl/kernel-ctl.h> |
00e2e675 | 41 | #include <common/sessiond-comm/relayd.h> |
10a8a223 DG |
42 | #include <common/sessiond-comm/sessiond-comm.h> |
43 | #include <common/kernel-consumer/kernel-consumer.h> | |
00e2e675 | 44 | #include <common/relayd/relayd.h> |
10a8a223 | 45 | #include <common/ust-consumer/ust-consumer.h> |
c8fea79c JR |
46 | #include <common/consumer/consumer-timer.h> |
47 | #include <common/consumer/consumer.h> | |
48 | #include <common/consumer/consumer-stream.h> | |
49 | #include <common/consumer/consumer-testpoint.h> | |
50 | #include <common/align.h> | |
5feafd41 | 51 | #include <common/consumer/consumer-metadata-cache.h> |
d2956687 JG |
52 | #include <common/trace-chunk.h> |
53 | #include <common/trace-chunk-registry.h> | |
54 | #include <common/string-utils/format.h> | |
3bd1e081 MD |
55 | |
56 | struct lttng_consumer_global_data consumer_data = { | |
3bd1e081 MD |
57 | .stream_count = 0, |
58 | .need_update = 1, | |
59 | .type = LTTNG_CONSUMER_UNKNOWN, | |
60 | }; | |
61 | ||
d8ef542d MD |
62 | enum consumer_channel_action { |
63 | CONSUMER_CHANNEL_ADD, | |
a0cbdd2e | 64 | CONSUMER_CHANNEL_DEL, |
d8ef542d MD |
65 | CONSUMER_CHANNEL_QUIT, |
66 | }; | |
67 | ||
68 | struct consumer_channel_msg { | |
69 | enum consumer_channel_action action; | |
a0cbdd2e MD |
70 | struct lttng_consumer_channel *chan; /* add */ |
71 | uint64_t key; /* del */ | |
d8ef542d MD |
72 | }; |
73 | ||
80957876 | 74 | /* Flag used to temporarily pause data consumption from testpoints. */ |
cf0bcb51 JG |
75 | int data_consumption_paused; |
76 | ||
3bd1e081 MD |
77 | /* |
78 | * Flag to inform the polling thread to quit when all fd hung up. Updated by | |
79 | * the consumer_thread_receive_fds when it notices that all fds has hung up. | |
80 | * Also updated by the signal handler (consumer_should_exit()). Read by the | |
81 | * polling threads. | |
82 | */ | |
10211f5c | 83 | int consumer_quit; |
3bd1e081 | 84 | |
43c34bc3 | 85 | /* |
43c34bc3 DG |
86 | * Global hash table containing respectively metadata and data streams. The |
87 | * stream element in this ht should only be updated by the metadata poll thread | |
88 | * for the metadata and the data poll thread for the data. | |
89 | */ | |
40dc48e0 DG |
90 | static struct lttng_ht *metadata_ht; |
91 | static struct lttng_ht *data_ht; | |
43c34bc3 | 92 | |
acdb9057 DG |
93 | /* |
94 | * Notify a thread lttng pipe to poll back again. This usually means that some | |
95 | * global state has changed so we just send back the thread in a poll wait | |
96 | * call. | |
97 | */ | |
98 | static void notify_thread_lttng_pipe(struct lttng_pipe *pipe) | |
99 | { | |
100 | struct lttng_consumer_stream *null_stream = NULL; | |
101 | ||
102 | assert(pipe); | |
103 | ||
104 | (void) lttng_pipe_write(pipe, &null_stream, sizeof(null_stream)); | |
105 | } | |
106 | ||
5c635c72 MD |
107 | static void notify_health_quit_pipe(int *pipe) |
108 | { | |
6cd525e8 | 109 | ssize_t ret; |
5c635c72 | 110 | |
6cd525e8 MD |
111 | ret = lttng_write(pipe[1], "4", 1); |
112 | if (ret < 1) { | |
5c635c72 MD |
113 | PERROR("write consumer health quit"); |
114 | } | |
115 | } | |
116 | ||
d8ef542d MD |
117 | static void notify_channel_pipe(struct lttng_consumer_local_data *ctx, |
118 | struct lttng_consumer_channel *chan, | |
a0cbdd2e | 119 | uint64_t key, |
d8ef542d MD |
120 | enum consumer_channel_action action) |
121 | { | |
122 | struct consumer_channel_msg msg; | |
6cd525e8 | 123 | ssize_t ret; |
d8ef542d | 124 | |
e56251fc DG |
125 | memset(&msg, 0, sizeof(msg)); |
126 | ||
d8ef542d MD |
127 | msg.action = action; |
128 | msg.chan = chan; | |
f21dae48 | 129 | msg.key = key; |
6cd525e8 MD |
130 | ret = lttng_write(ctx->consumer_channel_pipe[1], &msg, sizeof(msg)); |
131 | if (ret < sizeof(msg)) { | |
132 | PERROR("notify_channel_pipe write error"); | |
133 | } | |
d8ef542d MD |
134 | } |
135 | ||
a0cbdd2e MD |
136 | void notify_thread_del_channel(struct lttng_consumer_local_data *ctx, |
137 | uint64_t key) | |
138 | { | |
139 | notify_channel_pipe(ctx, NULL, key, CONSUMER_CHANNEL_DEL); | |
140 | } | |
141 | ||
d8ef542d MD |
142 | static int read_channel_pipe(struct lttng_consumer_local_data *ctx, |
143 | struct lttng_consumer_channel **chan, | |
a0cbdd2e | 144 | uint64_t *key, |
d8ef542d MD |
145 | enum consumer_channel_action *action) |
146 | { | |
147 | struct consumer_channel_msg msg; | |
6cd525e8 | 148 | ssize_t ret; |
d8ef542d | 149 | |
6cd525e8 MD |
150 | ret = lttng_read(ctx->consumer_channel_pipe[0], &msg, sizeof(msg)); |
151 | if (ret < sizeof(msg)) { | |
152 | ret = -1; | |
153 | goto error; | |
d8ef542d | 154 | } |
6cd525e8 MD |
155 | *action = msg.action; |
156 | *chan = msg.chan; | |
157 | *key = msg.key; | |
158 | error: | |
159 | return (int) ret; | |
d8ef542d MD |
160 | } |
161 | ||
212d67a2 DG |
162 | /* |
163 | * Cleanup the stream list of a channel. Those streams are not yet globally | |
164 | * visible | |
165 | */ | |
166 | static void clean_channel_stream_list(struct lttng_consumer_channel *channel) | |
167 | { | |
168 | struct lttng_consumer_stream *stream, *stmp; | |
169 | ||
170 | assert(channel); | |
171 | ||
172 | /* Delete streams that might have been left in the stream list. */ | |
173 | cds_list_for_each_entry_safe(stream, stmp, &channel->streams.head, | |
174 | send_node) { | |
175 | cds_list_del(&stream->send_node); | |
176 | /* | |
177 | * Once a stream is added to this list, the buffers were created so we | |
178 | * have a guarantee that this call will succeed. Setting the monitor | |
179 | * mode to 0 so we don't lock nor try to delete the stream from the | |
180 | * global hash table. | |
181 | */ | |
182 | stream->monitor = 0; | |
183 | consumer_stream_destroy(stream, NULL); | |
184 | } | |
185 | } | |
186 | ||
3bd1e081 MD |
187 | /* |
188 | * Find a stream. The consumer_data.lock must be locked during this | |
189 | * call. | |
190 | */ | |
d88aee68 | 191 | static struct lttng_consumer_stream *find_stream(uint64_t key, |
8389e4f8 | 192 | struct lttng_ht *ht) |
3bd1e081 | 193 | { |
e4421fec | 194 | struct lttng_ht_iter iter; |
d88aee68 | 195 | struct lttng_ht_node_u64 *node; |
e4421fec | 196 | struct lttng_consumer_stream *stream = NULL; |
3bd1e081 | 197 | |
8389e4f8 DG |
198 | assert(ht); |
199 | ||
d88aee68 DG |
200 | /* -1ULL keys are lookup failures */ |
201 | if (key == (uint64_t) -1ULL) { | |
7ad0a0cb | 202 | return NULL; |
7a57cf92 | 203 | } |
e4421fec | 204 | |
6065ceec DG |
205 | rcu_read_lock(); |
206 | ||
d88aee68 DG |
207 | lttng_ht_lookup(ht, &key, &iter); |
208 | node = lttng_ht_iter_get_node_u64(&iter); | |
e4421fec DG |
209 | if (node != NULL) { |
210 | stream = caa_container_of(node, struct lttng_consumer_stream, node); | |
3bd1e081 | 211 | } |
e4421fec | 212 | |
6065ceec DG |
213 | rcu_read_unlock(); |
214 | ||
e4421fec | 215 | return stream; |
3bd1e081 MD |
216 | } |
217 | ||
da009f2c | 218 | static void steal_stream_key(uint64_t key, struct lttng_ht *ht) |
7ad0a0cb MD |
219 | { |
220 | struct lttng_consumer_stream *stream; | |
221 | ||
04253271 | 222 | rcu_read_lock(); |
ffe60014 | 223 | stream = find_stream(key, ht); |
04253271 | 224 | if (stream) { |
da009f2c | 225 | stream->key = (uint64_t) -1ULL; |
04253271 MD |
226 | /* |
227 | * We don't want the lookup to match, but we still need | |
228 | * to iterate on this stream when iterating over the hash table. Just | |
229 | * change the node key. | |
230 | */ | |
da009f2c | 231 | stream->node.key = (uint64_t) -1ULL; |
04253271 MD |
232 | } |
233 | rcu_read_unlock(); | |
7ad0a0cb MD |
234 | } |
235 | ||
d56db448 DG |
236 | /* |
237 | * Return a channel object for the given key. | |
238 | * | |
239 | * RCU read side lock MUST be acquired before calling this function and | |
240 | * protects the channel ptr. | |
241 | */ | |
d88aee68 | 242 | struct lttng_consumer_channel *consumer_find_channel(uint64_t key) |
3bd1e081 | 243 | { |
e4421fec | 244 | struct lttng_ht_iter iter; |
d88aee68 | 245 | struct lttng_ht_node_u64 *node; |
e4421fec | 246 | struct lttng_consumer_channel *channel = NULL; |
3bd1e081 | 247 | |
d88aee68 DG |
248 | /* -1ULL keys are lookup failures */ |
249 | if (key == (uint64_t) -1ULL) { | |
7ad0a0cb | 250 | return NULL; |
7a57cf92 | 251 | } |
e4421fec | 252 | |
d88aee68 DG |
253 | lttng_ht_lookup(consumer_data.channel_ht, &key, &iter); |
254 | node = lttng_ht_iter_get_node_u64(&iter); | |
e4421fec DG |
255 | if (node != NULL) { |
256 | channel = caa_container_of(node, struct lttng_consumer_channel, node); | |
3bd1e081 | 257 | } |
e4421fec DG |
258 | |
259 | return channel; | |
3bd1e081 MD |
260 | } |
261 | ||
b5a6470f DG |
262 | /* |
263 | * There is a possibility that the consumer does not have enough time between | |
264 | * the close of the channel on the session daemon and the cleanup in here thus | |
265 | * once we have a channel add with an existing key, we know for sure that this | |
266 | * channel will eventually get cleaned up by all streams being closed. | |
267 | * | |
268 | * This function just nullifies the already existing channel key. | |
269 | */ | |
270 | static void steal_channel_key(uint64_t key) | |
271 | { | |
272 | struct lttng_consumer_channel *channel; | |
273 | ||
274 | rcu_read_lock(); | |
275 | channel = consumer_find_channel(key); | |
276 | if (channel) { | |
277 | channel->key = (uint64_t) -1ULL; | |
278 | /* | |
279 | * We don't want the lookup to match, but we still need to iterate on | |
280 | * this channel when iterating over the hash table. Just change the | |
281 | * node key. | |
282 | */ | |
283 | channel->node.key = (uint64_t) -1ULL; | |
284 | } | |
285 | rcu_read_unlock(); | |
286 | } | |
287 | ||
ffe60014 | 288 | static void free_channel_rcu(struct rcu_head *head) |
702b1ea4 | 289 | { |
d88aee68 DG |
290 | struct lttng_ht_node_u64 *node = |
291 | caa_container_of(head, struct lttng_ht_node_u64, head); | |
ffe60014 DG |
292 | struct lttng_consumer_channel *channel = |
293 | caa_container_of(node, struct lttng_consumer_channel, node); | |
702b1ea4 | 294 | |
b83e03c4 MD |
295 | switch (consumer_data.type) { |
296 | case LTTNG_CONSUMER_KERNEL: | |
297 | break; | |
298 | case LTTNG_CONSUMER32_UST: | |
299 | case LTTNG_CONSUMER64_UST: | |
300 | lttng_ustconsumer_free_channel(channel); | |
301 | break; | |
302 | default: | |
303 | ERR("Unknown consumer_data type"); | |
304 | abort(); | |
305 | } | |
ffe60014 | 306 | free(channel); |
702b1ea4 MD |
307 | } |
308 | ||
00e2e675 DG |
309 | /* |
310 | * RCU protected relayd socket pair free. | |
311 | */ | |
ffe60014 | 312 | static void free_relayd_rcu(struct rcu_head *head) |
00e2e675 | 313 | { |
d88aee68 DG |
314 | struct lttng_ht_node_u64 *node = |
315 | caa_container_of(head, struct lttng_ht_node_u64, head); | |
00e2e675 DG |
316 | struct consumer_relayd_sock_pair *relayd = |
317 | caa_container_of(node, struct consumer_relayd_sock_pair, node); | |
318 | ||
8994307f DG |
319 | /* |
320 | * Close all sockets. This is done in the call RCU since we don't want the | |
321 | * socket fds to be reassigned thus potentially creating bad state of the | |
322 | * relayd object. | |
323 | * | |
324 | * We do not have to lock the control socket mutex here since at this stage | |
325 | * there is no one referencing to this relayd object. | |
326 | */ | |
327 | (void) relayd_close(&relayd->control_sock); | |
328 | (void) relayd_close(&relayd->data_sock); | |
329 | ||
3a84e2f3 | 330 | pthread_mutex_destroy(&relayd->ctrl_sock_mutex); |
00e2e675 DG |
331 | free(relayd); |
332 | } | |
333 | ||
334 | /* | |
335 | * Destroy and free relayd socket pair object. | |
00e2e675 | 336 | */ |
51230d70 | 337 | void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd) |
00e2e675 DG |
338 | { |
339 | int ret; | |
340 | struct lttng_ht_iter iter; | |
341 | ||
173af62f DG |
342 | if (relayd == NULL) { |
343 | return; | |
344 | } | |
345 | ||
00e2e675 DG |
346 | DBG("Consumer destroy and close relayd socket pair"); |
347 | ||
348 | iter.iter.node = &relayd->node.node; | |
349 | ret = lttng_ht_del(consumer_data.relayd_ht, &iter); | |
173af62f | 350 | if (ret != 0) { |
8994307f | 351 | /* We assume the relayd is being or is destroyed */ |
173af62f DG |
352 | return; |
353 | } | |
00e2e675 | 354 | |
00e2e675 | 355 | /* RCU free() call */ |
ffe60014 DG |
356 | call_rcu(&relayd->node.head, free_relayd_rcu); |
357 | } | |
358 | ||
359 | /* | |
360 | * Remove a channel from the global list protected by a mutex. This function is | |
361 | * also responsible for freeing its data structures. | |
362 | */ | |
363 | void consumer_del_channel(struct lttng_consumer_channel *channel) | |
364 | { | |
ffe60014 DG |
365 | struct lttng_ht_iter iter; |
366 | ||
d88aee68 | 367 | DBG("Consumer delete channel key %" PRIu64, channel->key); |
ffe60014 DG |
368 | |
369 | pthread_mutex_lock(&consumer_data.lock); | |
a9838785 | 370 | pthread_mutex_lock(&channel->lock); |
ffe60014 | 371 | |
212d67a2 DG |
372 | /* Destroy streams that might have been left in the stream list. */ |
373 | clean_channel_stream_list(channel); | |
51e762e5 | 374 | |
d3e2ba59 JD |
375 | if (channel->live_timer_enabled == 1) { |
376 | consumer_timer_live_stop(channel); | |
377 | } | |
e9404c27 JG |
378 | if (channel->monitor_timer_enabled == 1) { |
379 | consumer_timer_monitor_stop(channel); | |
380 | } | |
d3e2ba59 | 381 | |
ffe60014 DG |
382 | switch (consumer_data.type) { |
383 | case LTTNG_CONSUMER_KERNEL: | |
384 | break; | |
385 | case LTTNG_CONSUMER32_UST: | |
386 | case LTTNG_CONSUMER64_UST: | |
387 | lttng_ustconsumer_del_channel(channel); | |
388 | break; | |
389 | default: | |
390 | ERR("Unknown consumer_data type"); | |
391 | assert(0); | |
392 | goto end; | |
393 | } | |
394 | ||
d2956687 JG |
395 | lttng_trace_chunk_put(channel->trace_chunk); |
396 | channel->trace_chunk = NULL; | |
5c3892a6 | 397 | |
d2956687 JG |
398 | if (channel->is_published) { |
399 | int ret; | |
400 | ||
401 | rcu_read_lock(); | |
402 | iter.iter.node = &channel->node.node; | |
403 | ret = lttng_ht_del(consumer_data.channel_ht, &iter); | |
404 | assert(!ret); | |
ffe60014 | 405 | |
d2956687 JG |
406 | iter.iter.node = &channel->channels_by_session_id_ht_node.node; |
407 | ret = lttng_ht_del(consumer_data.channels_by_session_id_ht, | |
408 | &iter); | |
409 | assert(!ret); | |
410 | rcu_read_unlock(); | |
411 | } | |
412 | ||
413 | call_rcu(&channel->node.head, free_channel_rcu); | |
ffe60014 | 414 | end: |
a9838785 | 415 | pthread_mutex_unlock(&channel->lock); |
ffe60014 | 416 | pthread_mutex_unlock(&consumer_data.lock); |
00e2e675 DG |
417 | } |
418 | ||
228b5bf7 DG |
419 | /* |
420 | * Iterate over the relayd hash table and destroy each element. Finally, | |
421 | * destroy the whole hash table. | |
422 | */ | |
423 | static void cleanup_relayd_ht(void) | |
424 | { | |
425 | struct lttng_ht_iter iter; | |
426 | struct consumer_relayd_sock_pair *relayd; | |
427 | ||
428 | rcu_read_lock(); | |
429 | ||
430 | cds_lfht_for_each_entry(consumer_data.relayd_ht->ht, &iter.iter, relayd, | |
431 | node.node) { | |
51230d70 | 432 | consumer_destroy_relayd(relayd); |
228b5bf7 DG |
433 | } |
434 | ||
228b5bf7 | 435 | rcu_read_unlock(); |
36b588ed MD |
436 | |
437 | lttng_ht_destroy(consumer_data.relayd_ht); | |
228b5bf7 DG |
438 | } |
439 | ||
8994307f DG |
440 | /* |
441 | * Update the end point status of all streams having the given network sequence | |
442 | * index (relayd index). | |
443 | * | |
444 | * It's atomically set without having the stream mutex locked which is fine | |
445 | * because we handle the write/read race with a pipe wakeup for each thread. | |
446 | */ | |
da009f2c | 447 | static void update_endpoint_status_by_netidx(uint64_t net_seq_idx, |
8994307f DG |
448 | enum consumer_endpoint_status status) |
449 | { | |
450 | struct lttng_ht_iter iter; | |
451 | struct lttng_consumer_stream *stream; | |
452 | ||
da009f2c | 453 | DBG("Consumer set delete flag on stream by idx %" PRIu64, net_seq_idx); |
8994307f DG |
454 | |
455 | rcu_read_lock(); | |
456 | ||
457 | /* Let's begin with metadata */ | |
458 | cds_lfht_for_each_entry(metadata_ht->ht, &iter.iter, stream, node.node) { | |
459 | if (stream->net_seq_idx == net_seq_idx) { | |
460 | uatomic_set(&stream->endpoint_status, status); | |
461 | DBG("Delete flag set to metadata stream %d", stream->wait_fd); | |
462 | } | |
463 | } | |
464 | ||
465 | /* Follow up by the data streams */ | |
466 | cds_lfht_for_each_entry(data_ht->ht, &iter.iter, stream, node.node) { | |
467 | if (stream->net_seq_idx == net_seq_idx) { | |
468 | uatomic_set(&stream->endpoint_status, status); | |
469 | DBG("Delete flag set to data stream %d", stream->wait_fd); | |
470 | } | |
471 | } | |
472 | rcu_read_unlock(); | |
473 | } | |
474 | ||
475 | /* | |
476 | * Cleanup a relayd object by flagging every associated streams for deletion, | |
477 | * destroying the object meaning removing it from the relayd hash table, | |
478 | * closing the sockets and freeing the memory in a RCU call. | |
479 | * | |
480 | * If a local data context is available, notify the threads that the streams' | |
481 | * state have changed. | |
482 | */ | |
9276e5c8 | 483 | void lttng_consumer_cleanup_relayd(struct consumer_relayd_sock_pair *relayd) |
8994307f | 484 | { |
da009f2c | 485 | uint64_t netidx; |
8994307f DG |
486 | |
487 | assert(relayd); | |
488 | ||
9276e5c8 | 489 | DBG("Cleaning up relayd object ID %"PRIu64, relayd->net_seq_idx); |
9617607b | 490 | |
8994307f DG |
491 | /* Save the net sequence index before destroying the object */ |
492 | netidx = relayd->net_seq_idx; | |
493 | ||
494 | /* | |
495 | * Delete the relayd from the relayd hash table, close the sockets and free | |
496 | * the object in a RCU call. | |
497 | */ | |
51230d70 | 498 | consumer_destroy_relayd(relayd); |
8994307f DG |
499 | |
500 | /* Set inactive endpoint to all streams */ | |
501 | update_endpoint_status_by_netidx(netidx, CONSUMER_ENDPOINT_INACTIVE); | |
502 | ||
503 | /* | |
504 | * With a local data context, notify the threads that the streams' state | |
505 | * have changed. The write() action on the pipe acts as an "implicit" | |
506 | * memory barrier ordering the updates of the end point status from the | |
507 | * read of this status which happens AFTER receiving this notify. | |
508 | */ | |
9276e5c8 JR |
509 | notify_thread_lttng_pipe(relayd->ctx->consumer_data_pipe); |
510 | notify_thread_lttng_pipe(relayd->ctx->consumer_metadata_pipe); | |
8994307f DG |
511 | } |
512 | ||
a6ba4fe1 DG |
513 | /* |
514 | * Flag a relayd socket pair for destruction. Destroy it if the refcount | |
515 | * reaches zero. | |
516 | * | |
517 | * RCU read side lock MUST be aquired before calling this function. | |
518 | */ | |
519 | void consumer_flag_relayd_for_destroy(struct consumer_relayd_sock_pair *relayd) | |
520 | { | |
521 | assert(relayd); | |
522 | ||
523 | /* Set destroy flag for this object */ | |
524 | uatomic_set(&relayd->destroy_flag, 1); | |
525 | ||
526 | /* Destroy the relayd if refcount is 0 */ | |
527 | if (uatomic_read(&relayd->refcount) == 0) { | |
51230d70 | 528 | consumer_destroy_relayd(relayd); |
a6ba4fe1 DG |
529 | } |
530 | } | |
531 | ||
3bd1e081 | 532 | /* |
1d1a276c DG |
533 | * Completly destroy stream from every visiable data structure and the given |
534 | * hash table if one. | |
535 | * | |
536 | * One this call returns, the stream object is not longer usable nor visible. | |
3bd1e081 | 537 | */ |
e316aad5 DG |
538 | void consumer_del_stream(struct lttng_consumer_stream *stream, |
539 | struct lttng_ht *ht) | |
3bd1e081 | 540 | { |
1d1a276c | 541 | consumer_stream_destroy(stream, ht); |
3bd1e081 MD |
542 | } |
543 | ||
5ab66908 MD |
544 | /* |
545 | * XXX naming of del vs destroy is all mixed up. | |
546 | */ | |
547 | void consumer_del_stream_for_data(struct lttng_consumer_stream *stream) | |
548 | { | |
549 | consumer_stream_destroy(stream, data_ht); | |
550 | } | |
551 | ||
552 | void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream) | |
553 | { | |
554 | consumer_stream_destroy(stream, metadata_ht); | |
555 | } | |
556 | ||
d9a2e16e JD |
557 | void consumer_stream_update_channel_attributes( |
558 | struct lttng_consumer_stream *stream, | |
559 | struct lttng_consumer_channel *channel) | |
560 | { | |
561 | stream->channel_read_only_attributes.tracefile_size = | |
562 | channel->tracefile_size; | |
d9a2e16e JD |
563 | } |
564 | ||
d88aee68 DG |
565 | struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, |
566 | uint64_t stream_key, | |
ffe60014 | 567 | const char *channel_name, |
57a269f2 | 568 | uint64_t relayd_id, |
53632229 | 569 | uint64_t session_id, |
d2956687 | 570 | struct lttng_trace_chunk *trace_chunk, |
ffe60014 DG |
571 | int cpu, |
572 | int *alloc_ret, | |
4891ece8 | 573 | enum consumer_channel_type type, |
d2956687 | 574 | unsigned int monitor) |
3bd1e081 | 575 | { |
ffe60014 | 576 | int ret; |
3bd1e081 | 577 | struct lttng_consumer_stream *stream; |
3bd1e081 | 578 | |
effcf122 | 579 | stream = zmalloc(sizeof(*stream)); |
3bd1e081 | 580 | if (stream == NULL) { |
7a57cf92 | 581 | PERROR("malloc struct lttng_consumer_stream"); |
ffe60014 | 582 | ret = -ENOMEM; |
7a57cf92 | 583 | goto end; |
3bd1e081 | 584 | } |
7a57cf92 | 585 | |
d2956687 JG |
586 | if (trace_chunk && !lttng_trace_chunk_get(trace_chunk)) { |
587 | ERR("Failed to acquire trace chunk reference during the creation of a stream"); | |
588 | ret = -1; | |
589 | goto error; | |
590 | } | |
d56db448 | 591 | |
d2956687 | 592 | rcu_read_lock(); |
3bd1e081 | 593 | stream->key = stream_key; |
d2956687 | 594 | stream->trace_chunk = trace_chunk; |
3bd1e081 MD |
595 | stream->out_fd = -1; |
596 | stream->out_fd_offset = 0; | |
e5d1a9b3 | 597 | stream->output_written = 0; |
ffe60014 | 598 | stream->net_seq_idx = relayd_id; |
53632229 | 599 | stream->session_id = session_id; |
4891ece8 | 600 | stream->monitor = monitor; |
774d490c | 601 | stream->endpoint_status = CONSUMER_ENDPOINT_ACTIVE; |
f8f3885c | 602 | stream->index_file = NULL; |
fb83fe64 | 603 | stream->last_sequence_number = -1ULL; |
53632229 | 604 | pthread_mutex_init(&stream->lock, NULL); |
c585821b | 605 | pthread_mutex_init(&stream->metadata_timer_lock, NULL); |
58b1f425 | 606 | |
ffe60014 DG |
607 | /* If channel is the metadata, flag this stream as metadata. */ |
608 | if (type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
609 | stream->metadata_flag = 1; | |
610 | /* Metadata is flat out. */ | |
611 | strncpy(stream->name, DEFAULT_METADATA_NAME, sizeof(stream->name)); | |
94d49140 JD |
612 | /* Live rendez-vous point. */ |
613 | pthread_cond_init(&stream->metadata_rdv, NULL); | |
614 | pthread_mutex_init(&stream->metadata_rdv_lock, NULL); | |
58b1f425 | 615 | } else { |
ffe60014 DG |
616 | /* Format stream name to <channel_name>_<cpu_number> */ |
617 | ret = snprintf(stream->name, sizeof(stream->name), "%s_%d", | |
618 | channel_name, cpu); | |
619 | if (ret < 0) { | |
620 | PERROR("snprintf stream name"); | |
621 | goto error; | |
622 | } | |
58b1f425 | 623 | } |
c30aaa51 | 624 | |
ffe60014 | 625 | /* Key is always the wait_fd for streams. */ |
d88aee68 | 626 | lttng_ht_node_init_u64(&stream->node, stream->key); |
ffe60014 | 627 | |
d8ef542d MD |
628 | /* Init node per channel id key */ |
629 | lttng_ht_node_init_u64(&stream->node_channel_id, channel_key); | |
630 | ||
53632229 | 631 | /* Init session id node with the stream session id */ |
d88aee68 | 632 | lttng_ht_node_init_u64(&stream->node_session_id, stream->session_id); |
53632229 | 633 | |
07b86b52 JD |
634 | DBG3("Allocated stream %s (key %" PRIu64 ", chan_key %" PRIu64 |
635 | " relayd_id %" PRIu64 ", session_id %" PRIu64, | |
636 | stream->name, stream->key, channel_key, | |
637 | stream->net_seq_idx, stream->session_id); | |
d56db448 DG |
638 | |
639 | rcu_read_unlock(); | |
3bd1e081 | 640 | return stream; |
c80048c6 MD |
641 | |
642 | error: | |
d56db448 | 643 | rcu_read_unlock(); |
d2956687 | 644 | lttng_trace_chunk_put(stream->trace_chunk); |
c80048c6 | 645 | free(stream); |
7a57cf92 | 646 | end: |
ffe60014 DG |
647 | if (alloc_ret) { |
648 | *alloc_ret = ret; | |
649 | } | |
c80048c6 | 650 | return NULL; |
3bd1e081 MD |
651 | } |
652 | ||
653 | /* | |
654 | * Add a stream to the global list protected by a mutex. | |
655 | */ | |
66d583dc | 656 | void consumer_add_data_stream(struct lttng_consumer_stream *stream) |
3bd1e081 | 657 | { |
5ab66908 | 658 | struct lttng_ht *ht = data_ht; |
3bd1e081 | 659 | |
e316aad5 | 660 | assert(stream); |
43c34bc3 | 661 | assert(ht); |
c77fc10a | 662 | |
d88aee68 | 663 | DBG3("Adding consumer stream %" PRIu64, stream->key); |
e316aad5 DG |
664 | |
665 | pthread_mutex_lock(&consumer_data.lock); | |
a9838785 | 666 | pthread_mutex_lock(&stream->chan->lock); |
ec6ea7d0 | 667 | pthread_mutex_lock(&stream->chan->timer_lock); |
2e818a6a | 668 | pthread_mutex_lock(&stream->lock); |
b0b335c8 | 669 | rcu_read_lock(); |
e316aad5 | 670 | |
43c34bc3 | 671 | /* Steal stream identifier to avoid having streams with the same key */ |
ffe60014 | 672 | steal_stream_key(stream->key, ht); |
43c34bc3 | 673 | |
d88aee68 | 674 | lttng_ht_add_unique_u64(ht, &stream->node); |
00e2e675 | 675 | |
d8ef542d MD |
676 | lttng_ht_add_u64(consumer_data.stream_per_chan_id_ht, |
677 | &stream->node_channel_id); | |
678 | ||
ca22feea DG |
679 | /* |
680 | * Add stream to the stream_list_ht of the consumer data. No need to steal | |
681 | * the key since the HT does not use it and we allow to add redundant keys | |
682 | * into this table. | |
683 | */ | |
d88aee68 | 684 | lttng_ht_add_u64(consumer_data.stream_list_ht, &stream->node_session_id); |
ca22feea | 685 | |
e316aad5 | 686 | /* |
ffe60014 DG |
687 | * When nb_init_stream_left reaches 0, we don't need to trigger any action |
688 | * in terms of destroying the associated channel, because the action that | |
e316aad5 DG |
689 | * causes the count to become 0 also causes a stream to be added. The |
690 | * channel deletion will thus be triggered by the following removal of this | |
691 | * stream. | |
692 | */ | |
ffe60014 | 693 | if (uatomic_read(&stream->chan->nb_init_stream_left) > 0) { |
f2ad556d MD |
694 | /* Increment refcount before decrementing nb_init_stream_left */ |
695 | cmm_smp_wmb(); | |
ffe60014 | 696 | uatomic_dec(&stream->chan->nb_init_stream_left); |
e316aad5 DG |
697 | } |
698 | ||
699 | /* Update consumer data once the node is inserted. */ | |
3bd1e081 MD |
700 | consumer_data.stream_count++; |
701 | consumer_data.need_update = 1; | |
702 | ||
e316aad5 | 703 | rcu_read_unlock(); |
2e818a6a | 704 | pthread_mutex_unlock(&stream->lock); |
ec6ea7d0 | 705 | pthread_mutex_unlock(&stream->chan->timer_lock); |
a9838785 | 706 | pthread_mutex_unlock(&stream->chan->lock); |
3bd1e081 | 707 | pthread_mutex_unlock(&consumer_data.lock); |
3bd1e081 MD |
708 | } |
709 | ||
5ab66908 MD |
710 | void consumer_del_data_stream(struct lttng_consumer_stream *stream) |
711 | { | |
712 | consumer_del_stream(stream, data_ht); | |
713 | } | |
714 | ||
00e2e675 | 715 | /* |
3f8e211f DG |
716 | * Add relayd socket to global consumer data hashtable. RCU read side lock MUST |
717 | * be acquired before calling this. | |
00e2e675 | 718 | */ |
d09e1200 | 719 | static int add_relayd(struct consumer_relayd_sock_pair *relayd) |
00e2e675 DG |
720 | { |
721 | int ret = 0; | |
d88aee68 | 722 | struct lttng_ht_node_u64 *node; |
00e2e675 DG |
723 | struct lttng_ht_iter iter; |
724 | ||
ffe60014 | 725 | assert(relayd); |
00e2e675 | 726 | |
00e2e675 | 727 | lttng_ht_lookup(consumer_data.relayd_ht, |
d88aee68 DG |
728 | &relayd->net_seq_idx, &iter); |
729 | node = lttng_ht_iter_get_node_u64(&iter); | |
00e2e675 | 730 | if (node != NULL) { |
00e2e675 DG |
731 | goto end; |
732 | } | |
d88aee68 | 733 | lttng_ht_add_unique_u64(consumer_data.relayd_ht, &relayd->node); |
00e2e675 | 734 | |
00e2e675 DG |
735 | end: |
736 | return ret; | |
737 | } | |
738 | ||
739 | /* | |
740 | * Allocate and return a consumer relayd socket. | |
741 | */ | |
027a694f | 742 | static struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair( |
da009f2c | 743 | uint64_t net_seq_idx) |
00e2e675 DG |
744 | { |
745 | struct consumer_relayd_sock_pair *obj = NULL; | |
746 | ||
da009f2c MD |
747 | /* net sequence index of -1 is a failure */ |
748 | if (net_seq_idx == (uint64_t) -1ULL) { | |
00e2e675 DG |
749 | goto error; |
750 | } | |
751 | ||
752 | obj = zmalloc(sizeof(struct consumer_relayd_sock_pair)); | |
753 | if (obj == NULL) { | |
754 | PERROR("zmalloc relayd sock"); | |
755 | goto error; | |
756 | } | |
757 | ||
758 | obj->net_seq_idx = net_seq_idx; | |
759 | obj->refcount = 0; | |
173af62f | 760 | obj->destroy_flag = 0; |
f96e4545 MD |
761 | obj->control_sock.sock.fd = -1; |
762 | obj->data_sock.sock.fd = -1; | |
d88aee68 | 763 | lttng_ht_node_init_u64(&obj->node, obj->net_seq_idx); |
00e2e675 DG |
764 | pthread_mutex_init(&obj->ctrl_sock_mutex, NULL); |
765 | ||
766 | error: | |
767 | return obj; | |
768 | } | |
769 | ||
770 | /* | |
771 | * Find a relayd socket pair in the global consumer data. | |
772 | * | |
773 | * Return the object if found else NULL. | |
b0b335c8 MD |
774 | * RCU read-side lock must be held across this call and while using the |
775 | * returned object. | |
00e2e675 | 776 | */ |
d88aee68 | 777 | struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key) |
00e2e675 DG |
778 | { |
779 | struct lttng_ht_iter iter; | |
d88aee68 | 780 | struct lttng_ht_node_u64 *node; |
00e2e675 DG |
781 | struct consumer_relayd_sock_pair *relayd = NULL; |
782 | ||
783 | /* Negative keys are lookup failures */ | |
d88aee68 | 784 | if (key == (uint64_t) -1ULL) { |
00e2e675 DG |
785 | goto error; |
786 | } | |
787 | ||
d88aee68 | 788 | lttng_ht_lookup(consumer_data.relayd_ht, &key, |
00e2e675 | 789 | &iter); |
d88aee68 | 790 | node = lttng_ht_iter_get_node_u64(&iter); |
00e2e675 DG |
791 | if (node != NULL) { |
792 | relayd = caa_container_of(node, struct consumer_relayd_sock_pair, node); | |
793 | } | |
794 | ||
00e2e675 DG |
795 | error: |
796 | return relayd; | |
797 | } | |
798 | ||
10a50311 JD |
799 | /* |
800 | * Find a relayd and send the stream | |
801 | * | |
802 | * Returns 0 on success, < 0 on error | |
803 | */ | |
804 | int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, | |
805 | char *path) | |
806 | { | |
807 | int ret = 0; | |
808 | struct consumer_relayd_sock_pair *relayd; | |
809 | ||
810 | assert(stream); | |
811 | assert(stream->net_seq_idx != -1ULL); | |
812 | assert(path); | |
813 | ||
814 | /* The stream is not metadata. Get relayd reference if exists. */ | |
815 | rcu_read_lock(); | |
816 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
817 | if (relayd != NULL) { | |
818 | /* Add stream on the relayd */ | |
819 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
820 | ret = relayd_add_stream(&relayd->control_sock, stream->name, | |
821 | path, &stream->relayd_stream_id, | |
d2956687 JG |
822 | stream->chan->tracefile_size, |
823 | stream->chan->tracefile_count, | |
824 | stream->trace_chunk); | |
10a50311 JD |
825 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
826 | if (ret < 0) { | |
9276e5c8 JR |
827 | ERR("Relayd add stream failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
828 | lttng_consumer_cleanup_relayd(relayd); | |
10a50311 JD |
829 | goto end; |
830 | } | |
1c20f0e2 | 831 | |
10a50311 | 832 | uatomic_inc(&relayd->refcount); |
d01178b6 | 833 | stream->sent_to_relayd = 1; |
10a50311 JD |
834 | } else { |
835 | ERR("Stream %" PRIu64 " relayd ID %" PRIu64 " unknown. Can't send it.", | |
836 | stream->key, stream->net_seq_idx); | |
837 | ret = -1; | |
838 | goto end; | |
839 | } | |
840 | ||
841 | DBG("Stream %s with key %" PRIu64 " sent to relayd id %" PRIu64, | |
842 | stream->name, stream->key, stream->net_seq_idx); | |
843 | ||
844 | end: | |
845 | rcu_read_unlock(); | |
846 | return ret; | |
847 | } | |
848 | ||
a4baae1b JD |
849 | /* |
850 | * Find a relayd and send the streams sent message | |
851 | * | |
852 | * Returns 0 on success, < 0 on error | |
853 | */ | |
854 | int consumer_send_relayd_streams_sent(uint64_t net_seq_idx) | |
855 | { | |
856 | int ret = 0; | |
857 | struct consumer_relayd_sock_pair *relayd; | |
858 | ||
859 | assert(net_seq_idx != -1ULL); | |
860 | ||
861 | /* The stream is not metadata. Get relayd reference if exists. */ | |
862 | rcu_read_lock(); | |
863 | relayd = consumer_find_relayd(net_seq_idx); | |
864 | if (relayd != NULL) { | |
865 | /* Add stream on the relayd */ | |
866 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
867 | ret = relayd_streams_sent(&relayd->control_sock); | |
868 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
869 | if (ret < 0) { | |
9276e5c8 JR |
870 | ERR("Relayd streams sent failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
871 | lttng_consumer_cleanup_relayd(relayd); | |
a4baae1b JD |
872 | goto end; |
873 | } | |
874 | } else { | |
875 | ERR("Relayd ID %" PRIu64 " unknown. Can't send streams_sent.", | |
876 | net_seq_idx); | |
877 | ret = -1; | |
878 | goto end; | |
879 | } | |
880 | ||
881 | ret = 0; | |
882 | DBG("All streams sent relayd id %" PRIu64, net_seq_idx); | |
883 | ||
884 | end: | |
885 | rcu_read_unlock(); | |
886 | return ret; | |
887 | } | |
888 | ||
10a50311 JD |
889 | /* |
890 | * Find a relayd and close the stream | |
891 | */ | |
892 | void close_relayd_stream(struct lttng_consumer_stream *stream) | |
893 | { | |
894 | struct consumer_relayd_sock_pair *relayd; | |
895 | ||
896 | /* The stream is not metadata. Get relayd reference if exists. */ | |
897 | rcu_read_lock(); | |
898 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
899 | if (relayd) { | |
900 | consumer_stream_relayd_close(stream, relayd); | |
901 | } | |
902 | rcu_read_unlock(); | |
903 | } | |
904 | ||
00e2e675 DG |
905 | /* |
906 | * Handle stream for relayd transmission if the stream applies for network | |
907 | * streaming where the net sequence index is set. | |
908 | * | |
909 | * Return destination file descriptor or negative value on error. | |
910 | */ | |
6197aea7 | 911 | static int write_relayd_stream_header(struct lttng_consumer_stream *stream, |
1d4dfdef DG |
912 | size_t data_size, unsigned long padding, |
913 | struct consumer_relayd_sock_pair *relayd) | |
00e2e675 DG |
914 | { |
915 | int outfd = -1, ret; | |
00e2e675 DG |
916 | struct lttcomm_relayd_data_hdr data_hdr; |
917 | ||
918 | /* Safety net */ | |
919 | assert(stream); | |
6197aea7 | 920 | assert(relayd); |
00e2e675 DG |
921 | |
922 | /* Reset data header */ | |
923 | memset(&data_hdr, 0, sizeof(data_hdr)); | |
924 | ||
00e2e675 DG |
925 | if (stream->metadata_flag) { |
926 | /* Caller MUST acquire the relayd control socket lock */ | |
927 | ret = relayd_send_metadata(&relayd->control_sock, data_size); | |
928 | if (ret < 0) { | |
929 | goto error; | |
930 | } | |
931 | ||
932 | /* Metadata are always sent on the control socket. */ | |
6151a90f | 933 | outfd = relayd->control_sock.sock.fd; |
00e2e675 DG |
934 | } else { |
935 | /* Set header with stream information */ | |
936 | data_hdr.stream_id = htobe64(stream->relayd_stream_id); | |
937 | data_hdr.data_size = htobe32(data_size); | |
1d4dfdef | 938 | data_hdr.padding_size = htobe32(padding); |
39df6d9f DG |
939 | /* |
940 | * Note that net_seq_num below is assigned with the *current* value of | |
941 | * next_net_seq_num and only after that the next_net_seq_num will be | |
942 | * increment. This is why when issuing a command on the relayd using | |
943 | * this next value, 1 should always be substracted in order to compare | |
944 | * the last seen sequence number on the relayd side to the last sent. | |
945 | */ | |
3604f373 | 946 | data_hdr.net_seq_num = htobe64(stream->next_net_seq_num); |
00e2e675 DG |
947 | /* Other fields are zeroed previously */ |
948 | ||
949 | ret = relayd_send_data_hdr(&relayd->data_sock, &data_hdr, | |
950 | sizeof(data_hdr)); | |
951 | if (ret < 0) { | |
952 | goto error; | |
953 | } | |
954 | ||
3604f373 DG |
955 | ++stream->next_net_seq_num; |
956 | ||
00e2e675 | 957 | /* Set to go on data socket */ |
6151a90f | 958 | outfd = relayd->data_sock.sock.fd; |
00e2e675 DG |
959 | } |
960 | ||
961 | error: | |
962 | return outfd; | |
963 | } | |
964 | ||
d2956687 JG |
965 | /* |
966 | * Trigger a dump of the metadata content. Following/during the succesful | |
967 | * completion of this call, the metadata poll thread will start receiving | |
968 | * metadata packets to consume. | |
969 | * | |
970 | * The caller must hold the channel and stream locks. | |
971 | */ | |
972 | static | |
973 | int consumer_metadata_stream_dump(struct lttng_consumer_stream *stream) | |
974 | { | |
975 | int ret; | |
976 | ||
977 | ASSERT_LOCKED(stream->chan->lock); | |
978 | ASSERT_LOCKED(stream->lock); | |
979 | assert(stream->metadata_flag); | |
980 | assert(stream->chan->trace_chunk); | |
981 | ||
982 | switch (consumer_data.type) { | |
983 | case LTTNG_CONSUMER_KERNEL: | |
984 | /* | |
985 | * Reset the position of what has been read from the | |
986 | * metadata cache to 0 so we can dump it again. | |
987 | */ | |
988 | ret = kernctl_metadata_cache_dump(stream->wait_fd); | |
989 | break; | |
990 | case LTTNG_CONSUMER32_UST: | |
991 | case LTTNG_CONSUMER64_UST: | |
992 | /* | |
993 | * Reset the position pushed from the metadata cache so it | |
994 | * will write from the beginning on the next push. | |
995 | */ | |
996 | stream->ust_metadata_pushed = 0; | |
997 | ret = consumer_metadata_wakeup_pipe(stream->chan); | |
998 | break; | |
999 | default: | |
1000 | ERR("Unknown consumer_data type"); | |
1001 | abort(); | |
1002 | } | |
1003 | if (ret < 0) { | |
1004 | ERR("Failed to dump the metadata cache"); | |
1005 | } | |
1006 | return ret; | |
1007 | } | |
1008 | ||
1009 | static | |
1010 | int lttng_consumer_channel_set_trace_chunk( | |
1011 | struct lttng_consumer_channel *channel, | |
1012 | struct lttng_trace_chunk *new_trace_chunk) | |
1013 | { | |
1014 | int ret = 0; | |
1015 | const bool is_local_trace = channel->relayd_id == -1ULL; | |
1016 | bool update_stream_trace_chunk; | |
1017 | struct cds_lfht_iter iter; | |
1018 | struct lttng_consumer_stream *stream; | |
1019 | unsigned long channel_hash; | |
1020 | ||
1021 | pthread_mutex_lock(&channel->lock); | |
1022 | /* | |
1023 | * A stream can transition to a state where it and its channel | |
1024 | * no longer belong to a trace chunk. For instance, this happens when | |
1025 | * a session is rotated while it is inactive. After the rotation | |
1026 | * of an inactive session completes, the channel and its streams no | |
1027 | * longer belong to a trace chunk. | |
1028 | * | |
1029 | * However, if a session is stopped, rotated, and started again, | |
1030 | * the session daemon will create a new chunk and send it to its peers. | |
1031 | * In that case, the streams' transition to a new chunk can be performed | |
1032 | * immediately. | |
1033 | * | |
1034 | * This trace chunk transition could also be performed lazily when | |
1035 | * a buffer is consumed. However, creating the files here allows the | |
1036 | * consumer daemon to report any creation error to the session daemon | |
1037 | * and cause the start of the tracing session to fail. | |
1038 | */ | |
1039 | update_stream_trace_chunk = !channel->trace_chunk && new_trace_chunk; | |
1040 | ||
1041 | /* | |
1042 | * The acquisition of the reference cannot fail (barring | |
1043 | * a severe internal error) since a reference to the published | |
1044 | * chunk is already held by the caller. | |
1045 | */ | |
1046 | if (new_trace_chunk) { | |
1047 | const bool acquired_reference = lttng_trace_chunk_get( | |
1048 | new_trace_chunk); | |
1049 | ||
1050 | assert(acquired_reference); | |
1051 | } | |
1052 | ||
1053 | lttng_trace_chunk_put(channel->trace_chunk); | |
1054 | channel->trace_chunk = new_trace_chunk; | |
1055 | if (!is_local_trace || !new_trace_chunk) { | |
1056 | /* Not an error. */ | |
1057 | goto end; | |
1058 | } | |
1059 | ||
1060 | if (!update_stream_trace_chunk) { | |
1061 | goto end; | |
1062 | } | |
1063 | ||
1064 | channel_hash = consumer_data.stream_per_chan_id_ht->hash_fct( | |
1065 | &channel->key, lttng_ht_seed); | |
1066 | rcu_read_lock(); | |
1067 | cds_lfht_for_each_entry_duplicate(consumer_data.stream_per_chan_id_ht->ht, | |
1068 | channel_hash, | |
1069 | consumer_data.stream_per_chan_id_ht->match_fct, | |
1070 | &channel->key, &iter, stream, node_channel_id.node) { | |
1071 | bool acquired_reference, should_regenerate_metadata = false; | |
1072 | ||
1073 | acquired_reference = lttng_trace_chunk_get(channel->trace_chunk); | |
1074 | assert(acquired_reference); | |
1075 | ||
1076 | pthread_mutex_lock(&stream->lock); | |
1077 | ||
1078 | /* | |
1079 | * On a transition from "no-chunk" to a new chunk, a metadata | |
1080 | * stream's content must be entirely dumped. This must occcur | |
1081 | * _after_ the creation of the metadata stream's output files | |
1082 | * as the consumption thread (not necessarily the one executing | |
1083 | * this) may start to consume during the call to | |
1084 | * consumer_metadata_stream_dump(). | |
1085 | */ | |
1086 | should_regenerate_metadata = | |
1087 | stream->metadata_flag && | |
1088 | !stream->trace_chunk && channel->trace_chunk; | |
1089 | stream->trace_chunk = channel->trace_chunk; | |
1090 | ret = consumer_stream_create_output_files(stream, true); | |
1091 | if (ret) { | |
1092 | pthread_mutex_unlock(&stream->lock); | |
1093 | goto end_rcu_unlock; | |
1094 | } | |
1095 | if (should_regenerate_metadata) { | |
1096 | ret = consumer_metadata_stream_dump(stream); | |
1097 | } | |
1098 | pthread_mutex_unlock(&stream->lock); | |
1099 | if (ret) { | |
1100 | goto end_rcu_unlock; | |
1101 | } | |
1102 | } | |
1103 | end_rcu_unlock: | |
1104 | rcu_read_unlock(); | |
1105 | end: | |
1106 | pthread_mutex_unlock(&channel->lock); | |
1107 | return ret; | |
1108 | } | |
1109 | ||
3bd1e081 | 1110 | /* |
ffe60014 DG |
1111 | * Allocate and return a new lttng_consumer_channel object using the given key |
1112 | * to initialize the hash table node. | |
1113 | * | |
1114 | * On error, return NULL. | |
3bd1e081 | 1115 | */ |
886224ff | 1116 | struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, |
ffe60014 | 1117 | uint64_t session_id, |
d2956687 | 1118 | const uint64_t *chunk_id, |
ffe60014 DG |
1119 | const char *pathname, |
1120 | const char *name, | |
57a269f2 | 1121 | uint64_t relayd_id, |
1624d5b7 JD |
1122 | enum lttng_event_output output, |
1123 | uint64_t tracefile_size, | |
2bba9e53 | 1124 | uint64_t tracefile_count, |
1950109e | 1125 | uint64_t session_id_per_pid, |
ecc48a90 | 1126 | unsigned int monitor, |
d7ba1388 | 1127 | unsigned int live_timer_interval, |
3d071855 | 1128 | const char *root_shm_path, |
d7ba1388 | 1129 | const char *shm_path) |
3bd1e081 | 1130 | { |
d2956687 JG |
1131 | struct lttng_consumer_channel *channel = NULL; |
1132 | struct lttng_trace_chunk *trace_chunk = NULL; | |
1133 | ||
1134 | if (chunk_id) { | |
1135 | trace_chunk = lttng_trace_chunk_registry_find_chunk( | |
1136 | consumer_data.chunk_registry, session_id, | |
1137 | *chunk_id); | |
1138 | if (!trace_chunk) { | |
1139 | ERR("Failed to find trace chunk reference during creation of channel"); | |
1140 | goto end; | |
1141 | } | |
1142 | } | |
3bd1e081 | 1143 | |
276b26d1 | 1144 | channel = zmalloc(sizeof(*channel)); |
3bd1e081 | 1145 | if (channel == NULL) { |
7a57cf92 | 1146 | PERROR("malloc struct lttng_consumer_channel"); |
3bd1e081 MD |
1147 | goto end; |
1148 | } | |
ffe60014 DG |
1149 | |
1150 | channel->key = key; | |
3bd1e081 | 1151 | channel->refcount = 0; |
ffe60014 | 1152 | channel->session_id = session_id; |
1950109e | 1153 | channel->session_id_per_pid = session_id_per_pid; |
ffe60014 | 1154 | channel->relayd_id = relayd_id; |
1624d5b7 JD |
1155 | channel->tracefile_size = tracefile_size; |
1156 | channel->tracefile_count = tracefile_count; | |
2bba9e53 | 1157 | channel->monitor = monitor; |
ecc48a90 | 1158 | channel->live_timer_interval = live_timer_interval; |
a9838785 | 1159 | pthread_mutex_init(&channel->lock, NULL); |
ec6ea7d0 | 1160 | pthread_mutex_init(&channel->timer_lock, NULL); |
ffe60014 | 1161 | |
0c759fc9 DG |
1162 | switch (output) { |
1163 | case LTTNG_EVENT_SPLICE: | |
1164 | channel->output = CONSUMER_CHANNEL_SPLICE; | |
1165 | break; | |
1166 | case LTTNG_EVENT_MMAP: | |
1167 | channel->output = CONSUMER_CHANNEL_MMAP; | |
1168 | break; | |
1169 | default: | |
1170 | assert(0); | |
1171 | free(channel); | |
1172 | channel = NULL; | |
1173 | goto end; | |
1174 | } | |
1175 | ||
07b86b52 JD |
1176 | /* |
1177 | * In monitor mode, the streams associated with the channel will be put in | |
1178 | * a special list ONLY owned by this channel. So, the refcount is set to 1 | |
1179 | * here meaning that the channel itself has streams that are referenced. | |
1180 | * | |
1181 | * On a channel deletion, once the channel is no longer visible, the | |
1182 | * refcount is decremented and checked for a zero value to delete it. With | |
1183 | * streams in no monitor mode, it will now be safe to destroy the channel. | |
1184 | */ | |
1185 | if (!channel->monitor) { | |
1186 | channel->refcount = 1; | |
1187 | } | |
1188 | ||
ffe60014 DG |
1189 | strncpy(channel->pathname, pathname, sizeof(channel->pathname)); |
1190 | channel->pathname[sizeof(channel->pathname) - 1] = '\0'; | |
1191 | ||
1192 | strncpy(channel->name, name, sizeof(channel->name)); | |
1193 | channel->name[sizeof(channel->name) - 1] = '\0'; | |
1194 | ||
3d071855 MD |
1195 | if (root_shm_path) { |
1196 | strncpy(channel->root_shm_path, root_shm_path, sizeof(channel->root_shm_path)); | |
1197 | channel->root_shm_path[sizeof(channel->root_shm_path) - 1] = '\0'; | |
1198 | } | |
d7ba1388 MD |
1199 | if (shm_path) { |
1200 | strncpy(channel->shm_path, shm_path, sizeof(channel->shm_path)); | |
1201 | channel->shm_path[sizeof(channel->shm_path) - 1] = '\0'; | |
1202 | } | |
1203 | ||
d88aee68 | 1204 | lttng_ht_node_init_u64(&channel->node, channel->key); |
5c3892a6 JG |
1205 | lttng_ht_node_init_u64(&channel->channels_by_session_id_ht_node, |
1206 | channel->session_id); | |
d8ef542d MD |
1207 | |
1208 | channel->wait_fd = -1; | |
ffe60014 DG |
1209 | CDS_INIT_LIST_HEAD(&channel->streams.head); |
1210 | ||
d2956687 JG |
1211 | if (trace_chunk) { |
1212 | int ret = lttng_consumer_channel_set_trace_chunk(channel, | |
1213 | trace_chunk); | |
1214 | if (ret) { | |
1215 | goto error; | |
1216 | } | |
1217 | } | |
1218 | ||
62a7b8ed | 1219 | DBG("Allocated channel (key %" PRIu64 ")", channel->key); |
3bd1e081 | 1220 | |
3bd1e081 | 1221 | end: |
d2956687 | 1222 | lttng_trace_chunk_put(trace_chunk); |
3bd1e081 | 1223 | return channel; |
d2956687 JG |
1224 | error: |
1225 | consumer_del_channel(channel); | |
1226 | channel = NULL; | |
1227 | goto end; | |
3bd1e081 MD |
1228 | } |
1229 | ||
1230 | /* | |
1231 | * Add a channel to the global list protected by a mutex. | |
821fffb2 | 1232 | * |
b5a6470f | 1233 | * Always return 0 indicating success. |
3bd1e081 | 1234 | */ |
d8ef542d MD |
1235 | int consumer_add_channel(struct lttng_consumer_channel *channel, |
1236 | struct lttng_consumer_local_data *ctx) | |
3bd1e081 | 1237 | { |
3bd1e081 | 1238 | pthread_mutex_lock(&consumer_data.lock); |
a9838785 | 1239 | pthread_mutex_lock(&channel->lock); |
ec6ea7d0 | 1240 | pthread_mutex_lock(&channel->timer_lock); |
c77fc10a | 1241 | |
b5a6470f DG |
1242 | /* |
1243 | * This gives us a guarantee that the channel we are about to add to the | |
1244 | * channel hash table will be unique. See this function comment on the why | |
1245 | * we need to steel the channel key at this stage. | |
1246 | */ | |
1247 | steal_channel_key(channel->key); | |
c77fc10a | 1248 | |
b5a6470f | 1249 | rcu_read_lock(); |
d88aee68 | 1250 | lttng_ht_add_unique_u64(consumer_data.channel_ht, &channel->node); |
5c3892a6 JG |
1251 | lttng_ht_add_u64(consumer_data.channels_by_session_id_ht, |
1252 | &channel->channels_by_session_id_ht_node); | |
6065ceec | 1253 | rcu_read_unlock(); |
d2956687 | 1254 | channel->is_published = true; |
b5a6470f | 1255 | |
ec6ea7d0 | 1256 | pthread_mutex_unlock(&channel->timer_lock); |
a9838785 | 1257 | pthread_mutex_unlock(&channel->lock); |
3bd1e081 | 1258 | pthread_mutex_unlock(&consumer_data.lock); |
702b1ea4 | 1259 | |
b5a6470f | 1260 | if (channel->wait_fd != -1 && channel->type == CONSUMER_CHANNEL_TYPE_DATA) { |
a0cbdd2e | 1261 | notify_channel_pipe(ctx, channel, -1, CONSUMER_CHANNEL_ADD); |
d8ef542d | 1262 | } |
b5a6470f DG |
1263 | |
1264 | return 0; | |
3bd1e081 MD |
1265 | } |
1266 | ||
1267 | /* | |
1268 | * Allocate the pollfd structure and the local view of the out fds to avoid | |
1269 | * doing a lookup in the linked list and concurrency issues when writing is | |
1270 | * needed. Called with consumer_data.lock held. | |
1271 | * | |
1272 | * Returns the number of fds in the structures. | |
1273 | */ | |
ffe60014 DG |
1274 | static int update_poll_array(struct lttng_consumer_local_data *ctx, |
1275 | struct pollfd **pollfd, struct lttng_consumer_stream **local_stream, | |
9a2fcf78 | 1276 | struct lttng_ht *ht, int *nb_inactive_fd) |
3bd1e081 | 1277 | { |
3bd1e081 | 1278 | int i = 0; |
e4421fec DG |
1279 | struct lttng_ht_iter iter; |
1280 | struct lttng_consumer_stream *stream; | |
3bd1e081 | 1281 | |
ffe60014 DG |
1282 | assert(ctx); |
1283 | assert(ht); | |
1284 | assert(pollfd); | |
1285 | assert(local_stream); | |
1286 | ||
3bd1e081 | 1287 | DBG("Updating poll fd array"); |
9a2fcf78 | 1288 | *nb_inactive_fd = 0; |
481d6c57 | 1289 | rcu_read_lock(); |
43c34bc3 | 1290 | cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) { |
8994307f DG |
1291 | /* |
1292 | * Only active streams with an active end point can be added to the | |
1293 | * poll set and local stream storage of the thread. | |
1294 | * | |
1295 | * There is a potential race here for endpoint_status to be updated | |
1296 | * just after the check. However, this is OK since the stream(s) will | |
1297 | * be deleted once the thread is notified that the end point state has | |
1298 | * changed where this function will be called back again. | |
9a2fcf78 JD |
1299 | * |
1300 | * We track the number of inactive FDs because they still need to be | |
1301 | * closed by the polling thread after a wakeup on the data_pipe or | |
1302 | * metadata_pipe. | |
8994307f | 1303 | */ |
d2956687 | 1304 | if (stream->endpoint_status == CONSUMER_ENDPOINT_INACTIVE) { |
9a2fcf78 | 1305 | (*nb_inactive_fd)++; |
3bd1e081 MD |
1306 | continue; |
1307 | } | |
7972aab2 DG |
1308 | /* |
1309 | * This clobbers way too much the debug output. Uncomment that if you | |
1310 | * need it for debugging purposes. | |
7972aab2 | 1311 | */ |
e4421fec | 1312 | (*pollfd)[i].fd = stream->wait_fd; |
3bd1e081 | 1313 | (*pollfd)[i].events = POLLIN | POLLPRI; |
e4421fec | 1314 | local_stream[i] = stream; |
3bd1e081 MD |
1315 | i++; |
1316 | } | |
481d6c57 | 1317 | rcu_read_unlock(); |
3bd1e081 MD |
1318 | |
1319 | /* | |
50f8ae69 | 1320 | * Insert the consumer_data_pipe at the end of the array and don't |
3bd1e081 MD |
1321 | * increment i so nb_fd is the number of real FD. |
1322 | */ | |
acdb9057 | 1323 | (*pollfd)[i].fd = lttng_pipe_get_readfd(ctx->consumer_data_pipe); |
509bb1cf | 1324 | (*pollfd)[i].events = POLLIN | POLLPRI; |
02b3d176 DG |
1325 | |
1326 | (*pollfd)[i + 1].fd = lttng_pipe_get_readfd(ctx->consumer_wakeup_pipe); | |
1327 | (*pollfd)[i + 1].events = POLLIN | POLLPRI; | |
3bd1e081 MD |
1328 | return i; |
1329 | } | |
1330 | ||
1331 | /* | |
84382d49 MD |
1332 | * Poll on the should_quit pipe and the command socket return -1 on |
1333 | * error, 1 if should exit, 0 if data is available on the command socket | |
3bd1e081 MD |
1334 | */ |
1335 | int lttng_consumer_poll_socket(struct pollfd *consumer_sockpoll) | |
1336 | { | |
1337 | int num_rdy; | |
1338 | ||
88f2b785 | 1339 | restart: |
3bd1e081 MD |
1340 | num_rdy = poll(consumer_sockpoll, 2, -1); |
1341 | if (num_rdy == -1) { | |
88f2b785 MD |
1342 | /* |
1343 | * Restart interrupted system call. | |
1344 | */ | |
1345 | if (errno == EINTR) { | |
1346 | goto restart; | |
1347 | } | |
7a57cf92 | 1348 | PERROR("Poll error"); |
84382d49 | 1349 | return -1; |
3bd1e081 | 1350 | } |
509bb1cf | 1351 | if (consumer_sockpoll[0].revents & (POLLIN | POLLPRI)) { |
3bd1e081 | 1352 | DBG("consumer_should_quit wake up"); |
84382d49 | 1353 | return 1; |
3bd1e081 MD |
1354 | } |
1355 | return 0; | |
3bd1e081 MD |
1356 | } |
1357 | ||
1358 | /* | |
1359 | * Set the error socket. | |
1360 | */ | |
ffe60014 DG |
1361 | void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx, |
1362 | int sock) | |
3bd1e081 MD |
1363 | { |
1364 | ctx->consumer_error_socket = sock; | |
1365 | } | |
1366 | ||
1367 | /* | |
1368 | * Set the command socket path. | |
1369 | */ | |
3bd1e081 MD |
1370 | void lttng_consumer_set_command_sock_path( |
1371 | struct lttng_consumer_local_data *ctx, char *sock) | |
1372 | { | |
1373 | ctx->consumer_command_sock_path = sock; | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Send return code to the session daemon. | |
1378 | * If the socket is not defined, we return 0, it is not a fatal error | |
1379 | */ | |
ffe60014 | 1380 | int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, int cmd) |
3bd1e081 MD |
1381 | { |
1382 | if (ctx->consumer_error_socket > 0) { | |
1383 | return lttcomm_send_unix_sock(ctx->consumer_error_socket, &cmd, | |
1384 | sizeof(enum lttcomm_sessiond_command)); | |
1385 | } | |
1386 | ||
1387 | return 0; | |
1388 | } | |
1389 | ||
1390 | /* | |
228b5bf7 DG |
1391 | * Close all the tracefiles and stream fds and MUST be called when all |
1392 | * instances are destroyed i.e. when all threads were joined and are ended. | |
3bd1e081 MD |
1393 | */ |
1394 | void lttng_consumer_cleanup(void) | |
1395 | { | |
e4421fec | 1396 | struct lttng_ht_iter iter; |
ffe60014 | 1397 | struct lttng_consumer_channel *channel; |
6065ceec DG |
1398 | |
1399 | rcu_read_lock(); | |
3bd1e081 | 1400 | |
ffe60014 DG |
1401 | cds_lfht_for_each_entry(consumer_data.channel_ht->ht, &iter.iter, channel, |
1402 | node.node) { | |
702b1ea4 | 1403 | consumer_del_channel(channel); |
3bd1e081 | 1404 | } |
6065ceec DG |
1405 | |
1406 | rcu_read_unlock(); | |
d6ce1df2 | 1407 | |
d6ce1df2 | 1408 | lttng_ht_destroy(consumer_data.channel_ht); |
5c3892a6 | 1409 | lttng_ht_destroy(consumer_data.channels_by_session_id_ht); |
228b5bf7 DG |
1410 | |
1411 | cleanup_relayd_ht(); | |
1412 | ||
d8ef542d MD |
1413 | lttng_ht_destroy(consumer_data.stream_per_chan_id_ht); |
1414 | ||
228b5bf7 DG |
1415 | /* |
1416 | * This HT contains streams that are freed by either the metadata thread or | |
1417 | * the data thread so we do *nothing* on the hash table and simply destroy | |
1418 | * it. | |
1419 | */ | |
1420 | lttng_ht_destroy(consumer_data.stream_list_ht); | |
28cc88f3 JG |
1421 | |
1422 | lttng_trace_chunk_registry_destroy(consumer_data.chunk_registry); | |
3bd1e081 MD |
1423 | } |
1424 | ||
1425 | /* | |
1426 | * Called from signal handler. | |
1427 | */ | |
1428 | void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx) | |
1429 | { | |
6cd525e8 MD |
1430 | ssize_t ret; |
1431 | ||
10211f5c | 1432 | CMM_STORE_SHARED(consumer_quit, 1); |
6cd525e8 MD |
1433 | ret = lttng_write(ctx->consumer_should_quit[1], "4", 1); |
1434 | if (ret < 1) { | |
7a57cf92 | 1435 | PERROR("write consumer quit"); |
3bd1e081 | 1436 | } |
ab1027f4 DG |
1437 | |
1438 | DBG("Consumer flag that it should quit"); | |
3bd1e081 MD |
1439 | } |
1440 | ||
5199ffc4 JG |
1441 | |
1442 | /* | |
1443 | * Flush pending writes to trace output disk file. | |
1444 | */ | |
1445 | static | |
00e2e675 DG |
1446 | void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream, |
1447 | off_t orig_offset) | |
3bd1e081 | 1448 | { |
c7a78aab | 1449 | int ret; |
3bd1e081 MD |
1450 | int outfd = stream->out_fd; |
1451 | ||
1452 | /* | |
1453 | * This does a blocking write-and-wait on any page that belongs to the | |
1454 | * subbuffer prior to the one we just wrote. | |
1455 | * Don't care about error values, as these are just hints and ways to | |
1456 | * limit the amount of page cache used. | |
1457 | */ | |
ffe60014 | 1458 | if (orig_offset < stream->max_sb_size) { |
3bd1e081 MD |
1459 | return; |
1460 | } | |
ffe60014 DG |
1461 | lttng_sync_file_range(outfd, orig_offset - stream->max_sb_size, |
1462 | stream->max_sb_size, | |
3bd1e081 MD |
1463 | SYNC_FILE_RANGE_WAIT_BEFORE |
1464 | | SYNC_FILE_RANGE_WRITE | |
1465 | | SYNC_FILE_RANGE_WAIT_AFTER); | |
1466 | /* | |
1467 | * Give hints to the kernel about how we access the file: | |
1468 | * POSIX_FADV_DONTNEED : we won't re-access data in a near future after | |
1469 | * we write it. | |
1470 | * | |
1471 | * We need to call fadvise again after the file grows because the | |
1472 | * kernel does not seem to apply fadvise to non-existing parts of the | |
1473 | * file. | |
1474 | * | |
1475 | * Call fadvise _after_ having waited for the page writeback to | |
1476 | * complete because the dirty page writeback semantic is not well | |
1477 | * defined. So it can be expected to lead to lower throughput in | |
1478 | * streaming. | |
1479 | */ | |
c7a78aab | 1480 | ret = posix_fadvise(outfd, orig_offset - stream->max_sb_size, |
ffe60014 | 1481 | stream->max_sb_size, POSIX_FADV_DONTNEED); |
a0d0e127 | 1482 | if (ret && ret != -ENOSYS) { |
a74a5f4a JG |
1483 | errno = ret; |
1484 | PERROR("posix_fadvise on fd %i", outfd); | |
c7a78aab | 1485 | } |
3bd1e081 MD |
1486 | } |
1487 | ||
1488 | /* | |
1489 | * Initialise the necessary environnement : | |
1490 | * - create a new context | |
1491 | * - create the poll_pipe | |
1492 | * - create the should_quit pipe (for signal handler) | |
1493 | * - create the thread pipe (for splice) | |
1494 | * | |
1495 | * Takes a function pointer as argument, this function is called when data is | |
1496 | * available on a buffer. This function is responsible to do the | |
1497 | * kernctl_get_next_subbuf, read the data with mmap or splice depending on the | |
1498 | * buffer configuration and then kernctl_put_next_subbuf at the end. | |
1499 | * | |
1500 | * Returns a pointer to the new context or NULL on error. | |
1501 | */ | |
1502 | struct lttng_consumer_local_data *lttng_consumer_create( | |
1503 | enum lttng_consumer_type type, | |
4078b776 | 1504 | ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream, |
d41f73b7 | 1505 | struct lttng_consumer_local_data *ctx), |
3bd1e081 MD |
1506 | int (*recv_channel)(struct lttng_consumer_channel *channel), |
1507 | int (*recv_stream)(struct lttng_consumer_stream *stream), | |
30319bcb | 1508 | int (*update_stream)(uint64_t stream_key, uint32_t state)) |
3bd1e081 | 1509 | { |
d8ef542d | 1510 | int ret; |
3bd1e081 MD |
1511 | struct lttng_consumer_local_data *ctx; |
1512 | ||
1513 | assert(consumer_data.type == LTTNG_CONSUMER_UNKNOWN || | |
1514 | consumer_data.type == type); | |
1515 | consumer_data.type = type; | |
1516 | ||
effcf122 | 1517 | ctx = zmalloc(sizeof(struct lttng_consumer_local_data)); |
3bd1e081 | 1518 | if (ctx == NULL) { |
7a57cf92 | 1519 | PERROR("allocating context"); |
3bd1e081 MD |
1520 | goto error; |
1521 | } | |
1522 | ||
1523 | ctx->consumer_error_socket = -1; | |
331744e3 | 1524 | ctx->consumer_metadata_socket = -1; |
75d83e50 | 1525 | pthread_mutex_init(&ctx->metadata_socket_lock, NULL); |
3bd1e081 MD |
1526 | /* assign the callbacks */ |
1527 | ctx->on_buffer_ready = buffer_ready; | |
1528 | ctx->on_recv_channel = recv_channel; | |
1529 | ctx->on_recv_stream = recv_stream; | |
1530 | ctx->on_update_stream = update_stream; | |
1531 | ||
acdb9057 DG |
1532 | ctx->consumer_data_pipe = lttng_pipe_open(0); |
1533 | if (!ctx->consumer_data_pipe) { | |
3bd1e081 MD |
1534 | goto error_poll_pipe; |
1535 | } | |
1536 | ||
02b3d176 DG |
1537 | ctx->consumer_wakeup_pipe = lttng_pipe_open(0); |
1538 | if (!ctx->consumer_wakeup_pipe) { | |
1539 | goto error_wakeup_pipe; | |
1540 | } | |
1541 | ||
3bd1e081 MD |
1542 | ret = pipe(ctx->consumer_should_quit); |
1543 | if (ret < 0) { | |
7a57cf92 | 1544 | PERROR("Error creating recv pipe"); |
3bd1e081 MD |
1545 | goto error_quit_pipe; |
1546 | } | |
1547 | ||
d8ef542d MD |
1548 | ret = pipe(ctx->consumer_channel_pipe); |
1549 | if (ret < 0) { | |
1550 | PERROR("Error creating channel pipe"); | |
1551 | goto error_channel_pipe; | |
1552 | } | |
1553 | ||
13886d2d DG |
1554 | ctx->consumer_metadata_pipe = lttng_pipe_open(0); |
1555 | if (!ctx->consumer_metadata_pipe) { | |
fb3a43a9 DG |
1556 | goto error_metadata_pipe; |
1557 | } | |
3bd1e081 | 1558 | |
e9404c27 JG |
1559 | ctx->channel_monitor_pipe = -1; |
1560 | ||
fb3a43a9 | 1561 | return ctx; |
3bd1e081 | 1562 | |
fb3a43a9 | 1563 | error_metadata_pipe: |
d8ef542d MD |
1564 | utils_close_pipe(ctx->consumer_channel_pipe); |
1565 | error_channel_pipe: | |
d8ef542d | 1566 | utils_close_pipe(ctx->consumer_should_quit); |
3bd1e081 | 1567 | error_quit_pipe: |
02b3d176 DG |
1568 | lttng_pipe_destroy(ctx->consumer_wakeup_pipe); |
1569 | error_wakeup_pipe: | |
acdb9057 | 1570 | lttng_pipe_destroy(ctx->consumer_data_pipe); |
3bd1e081 MD |
1571 | error_poll_pipe: |
1572 | free(ctx); | |
1573 | error: | |
1574 | return NULL; | |
1575 | } | |
1576 | ||
282dadbc MD |
1577 | /* |
1578 | * Iterate over all streams of the hashtable and free them properly. | |
1579 | */ | |
1580 | static void destroy_data_stream_ht(struct lttng_ht *ht) | |
1581 | { | |
1582 | struct lttng_ht_iter iter; | |
1583 | struct lttng_consumer_stream *stream; | |
1584 | ||
1585 | if (ht == NULL) { | |
1586 | return; | |
1587 | } | |
1588 | ||
1589 | rcu_read_lock(); | |
1590 | cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) { | |
1591 | /* | |
1592 | * Ignore return value since we are currently cleaning up so any error | |
1593 | * can't be handled. | |
1594 | */ | |
1595 | (void) consumer_del_stream(stream, ht); | |
1596 | } | |
1597 | rcu_read_unlock(); | |
1598 | ||
1599 | lttng_ht_destroy(ht); | |
1600 | } | |
1601 | ||
1602 | /* | |
1603 | * Iterate over all streams of the metadata hashtable and free them | |
1604 | * properly. | |
1605 | */ | |
1606 | static void destroy_metadata_stream_ht(struct lttng_ht *ht) | |
1607 | { | |
1608 | struct lttng_ht_iter iter; | |
1609 | struct lttng_consumer_stream *stream; | |
1610 | ||
1611 | if (ht == NULL) { | |
1612 | return; | |
1613 | } | |
1614 | ||
1615 | rcu_read_lock(); | |
1616 | cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) { | |
1617 | /* | |
1618 | * Ignore return value since we are currently cleaning up so any error | |
1619 | * can't be handled. | |
1620 | */ | |
1621 | (void) consumer_del_metadata_stream(stream, ht); | |
1622 | } | |
1623 | rcu_read_unlock(); | |
1624 | ||
1625 | lttng_ht_destroy(ht); | |
1626 | } | |
1627 | ||
3bd1e081 MD |
1628 | /* |
1629 | * Close all fds associated with the instance and free the context. | |
1630 | */ | |
1631 | void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx) | |
1632 | { | |
4c462e79 MD |
1633 | int ret; |
1634 | ||
ab1027f4 DG |
1635 | DBG("Consumer destroying it. Closing everything."); |
1636 | ||
4f2e75b9 DG |
1637 | if (!ctx) { |
1638 | return; | |
1639 | } | |
1640 | ||
282dadbc MD |
1641 | destroy_data_stream_ht(data_ht); |
1642 | destroy_metadata_stream_ht(metadata_ht); | |
1643 | ||
4c462e79 MD |
1644 | ret = close(ctx->consumer_error_socket); |
1645 | if (ret) { | |
1646 | PERROR("close"); | |
1647 | } | |
331744e3 JD |
1648 | ret = close(ctx->consumer_metadata_socket); |
1649 | if (ret) { | |
1650 | PERROR("close"); | |
1651 | } | |
d8ef542d | 1652 | utils_close_pipe(ctx->consumer_channel_pipe); |
acdb9057 | 1653 | lttng_pipe_destroy(ctx->consumer_data_pipe); |
13886d2d | 1654 | lttng_pipe_destroy(ctx->consumer_metadata_pipe); |
02b3d176 | 1655 | lttng_pipe_destroy(ctx->consumer_wakeup_pipe); |
d8ef542d | 1656 | utils_close_pipe(ctx->consumer_should_quit); |
fb3a43a9 | 1657 | |
3bd1e081 MD |
1658 | unlink(ctx->consumer_command_sock_path); |
1659 | free(ctx); | |
1660 | } | |
1661 | ||
6197aea7 DG |
1662 | /* |
1663 | * Write the metadata stream id on the specified file descriptor. | |
1664 | */ | |
1665 | static int write_relayd_metadata_id(int fd, | |
1666 | struct lttng_consumer_stream *stream, | |
239f61af | 1667 | unsigned long padding) |
6197aea7 | 1668 | { |
6cd525e8 | 1669 | ssize_t ret; |
1d4dfdef | 1670 | struct lttcomm_relayd_metadata_payload hdr; |
6197aea7 | 1671 | |
1d4dfdef DG |
1672 | hdr.stream_id = htobe64(stream->relayd_stream_id); |
1673 | hdr.padding_size = htobe32(padding); | |
6cd525e8 MD |
1674 | ret = lttng_write(fd, (void *) &hdr, sizeof(hdr)); |
1675 | if (ret < sizeof(hdr)) { | |
d7b75ec8 | 1676 | /* |
6f04ed72 | 1677 | * This error means that the fd's end is closed so ignore the PERROR |
d7b75ec8 DG |
1678 | * not to clubber the error output since this can happen in a normal |
1679 | * code path. | |
1680 | */ | |
1681 | if (errno != EPIPE) { | |
1682 | PERROR("write metadata stream id"); | |
1683 | } | |
1684 | DBG3("Consumer failed to write relayd metadata id (errno: %d)", errno); | |
534d2592 DG |
1685 | /* |
1686 | * Set ret to a negative value because if ret != sizeof(hdr), we don't | |
1687 | * handle writting the missing part so report that as an error and | |
1688 | * don't lie to the caller. | |
1689 | */ | |
1690 | ret = -1; | |
6197aea7 DG |
1691 | goto end; |
1692 | } | |
1d4dfdef DG |
1693 | DBG("Metadata stream id %" PRIu64 " with padding %lu written before data", |
1694 | stream->relayd_stream_id, padding); | |
6197aea7 DG |
1695 | |
1696 | end: | |
6cd525e8 | 1697 | return (int) ret; |
6197aea7 DG |
1698 | } |
1699 | ||
3bd1e081 | 1700 | /* |
09e26845 DG |
1701 | * Mmap the ring buffer, read it and write the data to the tracefile. This is a |
1702 | * core function for writing trace buffers to either the local filesystem or | |
1703 | * the network. | |
1704 | * | |
d2956687 | 1705 | * It must be called with the stream and the channel lock held. |
79d4ffb7 | 1706 | * |
09e26845 | 1707 | * Careful review MUST be put if any changes occur! |
3bd1e081 MD |
1708 | * |
1709 | * Returns the number of bytes written | |
1710 | */ | |
4078b776 | 1711 | ssize_t lttng_consumer_on_read_subbuffer_mmap( |
3bd1e081 | 1712 | struct lttng_consumer_local_data *ctx, |
1d4dfdef | 1713 | struct lttng_consumer_stream *stream, unsigned long len, |
309167d2 | 1714 | unsigned long padding, |
50adc264 | 1715 | struct ctf_packet_index *index) |
3bd1e081 | 1716 | { |
f02e1e8a | 1717 | unsigned long mmap_offset; |
ffe60014 | 1718 | void *mmap_base; |
994ab360 | 1719 | ssize_t ret = 0; |
f02e1e8a DG |
1720 | off_t orig_offset = stream->out_fd_offset; |
1721 | /* Default is on the disk */ | |
1722 | int outfd = stream->out_fd; | |
f02e1e8a | 1723 | struct consumer_relayd_sock_pair *relayd = NULL; |
8994307f | 1724 | unsigned int relayd_hang_up = 0; |
f02e1e8a DG |
1725 | |
1726 | /* RCU lock for the relayd pointer */ | |
1727 | rcu_read_lock(); | |
1728 | ||
d2956687 JG |
1729 | assert(stream->chan->trace_chunk); |
1730 | ||
f02e1e8a | 1731 | /* Flag that the current stream if set for network streaming. */ |
da009f2c | 1732 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
f02e1e8a DG |
1733 | relayd = consumer_find_relayd(stream->net_seq_idx); |
1734 | if (relayd == NULL) { | |
56591bac | 1735 | ret = -EPIPE; |
f02e1e8a DG |
1736 | goto end; |
1737 | } | |
1738 | } | |
1739 | ||
1740 | /* get the offset inside the fd to mmap */ | |
3bd1e081 MD |
1741 | switch (consumer_data.type) { |
1742 | case LTTNG_CONSUMER_KERNEL: | |
ffe60014 | 1743 | mmap_base = stream->mmap_base; |
f02e1e8a | 1744 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); |
994ab360 | 1745 | if (ret < 0) { |
56591bac | 1746 | PERROR("tracer ctl get_mmap_read_offset"); |
56591bac MD |
1747 | goto end; |
1748 | } | |
f02e1e8a | 1749 | break; |
7753dea8 MD |
1750 | case LTTNG_CONSUMER32_UST: |
1751 | case LTTNG_CONSUMER64_UST: | |
ffe60014 DG |
1752 | mmap_base = lttng_ustctl_get_mmap_base(stream); |
1753 | if (!mmap_base) { | |
1754 | ERR("read mmap get mmap base for stream %s", stream->name); | |
994ab360 | 1755 | ret = -EPERM; |
ffe60014 DG |
1756 | goto end; |
1757 | } | |
1758 | ret = lttng_ustctl_get_mmap_read_offset(stream, &mmap_offset); | |
56591bac MD |
1759 | if (ret != 0) { |
1760 | PERROR("tracer ctl get_mmap_read_offset"); | |
994ab360 | 1761 | ret = -EINVAL; |
56591bac MD |
1762 | goto end; |
1763 | } | |
f02e1e8a | 1764 | break; |
3bd1e081 MD |
1765 | default: |
1766 | ERR("Unknown consumer_data type"); | |
1767 | assert(0); | |
1768 | } | |
b9182dd9 | 1769 | |
f02e1e8a DG |
1770 | /* Handle stream on the relayd if the output is on the network */ |
1771 | if (relayd) { | |
1772 | unsigned long netlen = len; | |
1773 | ||
1774 | /* | |
1775 | * Lock the control socket for the complete duration of the function | |
1776 | * since from this point on we will use the socket. | |
1777 | */ | |
1778 | if (stream->metadata_flag) { | |
1779 | /* Metadata requires the control socket. */ | |
1780 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
93ec662e JD |
1781 | if (stream->reset_metadata_flag) { |
1782 | ret = relayd_reset_metadata(&relayd->control_sock, | |
1783 | stream->relayd_stream_id, | |
1784 | stream->metadata_version); | |
1785 | if (ret < 0) { | |
1786 | relayd_hang_up = 1; | |
1787 | goto write_error; | |
1788 | } | |
1789 | stream->reset_metadata_flag = 0; | |
1790 | } | |
1d4dfdef | 1791 | netlen += sizeof(struct lttcomm_relayd_metadata_payload); |
f02e1e8a DG |
1792 | } |
1793 | ||
1d4dfdef | 1794 | ret = write_relayd_stream_header(stream, netlen, padding, relayd); |
994ab360 DG |
1795 | if (ret < 0) { |
1796 | relayd_hang_up = 1; | |
1797 | goto write_error; | |
1798 | } | |
1799 | /* Use the returned socket. */ | |
1800 | outfd = ret; | |
f02e1e8a | 1801 | |
994ab360 DG |
1802 | /* Write metadata stream id before payload */ |
1803 | if (stream->metadata_flag) { | |
239f61af | 1804 | ret = write_relayd_metadata_id(outfd, stream, padding); |
994ab360 | 1805 | if (ret < 0) { |
8994307f DG |
1806 | relayd_hang_up = 1; |
1807 | goto write_error; | |
1808 | } | |
f02e1e8a | 1809 | } |
1d4dfdef DG |
1810 | } else { |
1811 | /* No streaming, we have to set the len with the full padding */ | |
1812 | len += padding; | |
1624d5b7 | 1813 | |
93ec662e JD |
1814 | if (stream->metadata_flag && stream->reset_metadata_flag) { |
1815 | ret = utils_truncate_stream_file(stream->out_fd, 0); | |
1816 | if (ret < 0) { | |
1817 | ERR("Reset metadata file"); | |
1818 | goto end; | |
1819 | } | |
1820 | stream->reset_metadata_flag = 0; | |
1821 | } | |
1822 | ||
1624d5b7 JD |
1823 | /* |
1824 | * Check if we need to change the tracefile before writing the packet. | |
1825 | */ | |
1826 | if (stream->chan->tracefile_size > 0 && | |
1827 | (stream->tracefile_size_current + len) > | |
1828 | stream->chan->tracefile_size) { | |
d2956687 JG |
1829 | ret = consumer_stream_rotate_output_files(stream); |
1830 | if (ret) { | |
1624d5b7 JD |
1831 | goto end; |
1832 | } | |
309167d2 | 1833 | outfd = stream->out_fd; |
a1ae300f | 1834 | orig_offset = 0; |
1624d5b7 JD |
1835 | } |
1836 | stream->tracefile_size_current += len; | |
309167d2 JD |
1837 | if (index) { |
1838 | index->offset = htobe64(stream->out_fd_offset); | |
1839 | } | |
f02e1e8a DG |
1840 | } |
1841 | ||
d02b8372 DG |
1842 | /* |
1843 | * This call guarantee that len or less is returned. It's impossible to | |
1844 | * receive a ret value that is bigger than len. | |
1845 | */ | |
1846 | ret = lttng_write(outfd, mmap_base + mmap_offset, len); | |
1847 | DBG("Consumer mmap write() ret %zd (len %lu)", ret, len); | |
1848 | if (ret < 0 || ((size_t) ret != len)) { | |
1849 | /* | |
1850 | * Report error to caller if nothing was written else at least send the | |
1851 | * amount written. | |
1852 | */ | |
1853 | if (ret < 0) { | |
994ab360 | 1854 | ret = -errno; |
f02e1e8a | 1855 | } |
994ab360 | 1856 | relayd_hang_up = 1; |
f02e1e8a | 1857 | |
d02b8372 | 1858 | /* Socket operation failed. We consider the relayd dead */ |
fcf0f774 | 1859 | if (errno == EPIPE) { |
d02b8372 DG |
1860 | /* |
1861 | * This is possible if the fd is closed on the other side | |
1862 | * (outfd) or any write problem. It can be verbose a bit for a | |
1863 | * normal execution if for instance the relayd is stopped | |
1864 | * abruptly. This can happen so set this to a DBG statement. | |
1865 | */ | |
1866 | DBG("Consumer mmap write detected relayd hang up"); | |
994ab360 DG |
1867 | } else { |
1868 | /* Unhandled error, print it and stop function right now. */ | |
1869 | PERROR("Error in write mmap (ret %zd != len %lu)", ret, len); | |
f02e1e8a | 1870 | } |
994ab360 | 1871 | goto write_error; |
d02b8372 DG |
1872 | } |
1873 | stream->output_written += ret; | |
d02b8372 DG |
1874 | |
1875 | /* This call is useless on a socket so better save a syscall. */ | |
1876 | if (!relayd) { | |
1877 | /* This won't block, but will start writeout asynchronously */ | |
1878 | lttng_sync_file_range(outfd, stream->out_fd_offset, len, | |
1879 | SYNC_FILE_RANGE_WRITE); | |
1880 | stream->out_fd_offset += len; | |
f5dbe415 | 1881 | lttng_consumer_sync_trace_file(stream, orig_offset); |
f02e1e8a | 1882 | } |
f02e1e8a | 1883 | |
8994307f DG |
1884 | write_error: |
1885 | /* | |
1886 | * This is a special case that the relayd has closed its socket. Let's | |
1887 | * cleanup the relayd object and all associated streams. | |
1888 | */ | |
1889 | if (relayd && relayd_hang_up) { | |
9276e5c8 JR |
1890 | ERR("Relayd hangup. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
1891 | lttng_consumer_cleanup_relayd(relayd); | |
8994307f DG |
1892 | } |
1893 | ||
f02e1e8a DG |
1894 | end: |
1895 | /* Unlock only if ctrl socket used */ | |
1896 | if (relayd && stream->metadata_flag) { | |
1897 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
1898 | } | |
1899 | ||
1900 | rcu_read_unlock(); | |
994ab360 | 1901 | return ret; |
3bd1e081 MD |
1902 | } |
1903 | ||
1904 | /* | |
1905 | * Splice the data from the ring buffer to the tracefile. | |
1906 | * | |
79d4ffb7 DG |
1907 | * It must be called with the stream lock held. |
1908 | * | |
3bd1e081 MD |
1909 | * Returns the number of bytes spliced. |
1910 | */ | |
4078b776 | 1911 | ssize_t lttng_consumer_on_read_subbuffer_splice( |
3bd1e081 | 1912 | struct lttng_consumer_local_data *ctx, |
1d4dfdef | 1913 | struct lttng_consumer_stream *stream, unsigned long len, |
309167d2 | 1914 | unsigned long padding, |
50adc264 | 1915 | struct ctf_packet_index *index) |
3bd1e081 | 1916 | { |
f02e1e8a DG |
1917 | ssize_t ret = 0, written = 0, ret_splice = 0; |
1918 | loff_t offset = 0; | |
1919 | off_t orig_offset = stream->out_fd_offset; | |
1920 | int fd = stream->wait_fd; | |
1921 | /* Default is on the disk */ | |
1922 | int outfd = stream->out_fd; | |
f02e1e8a | 1923 | struct consumer_relayd_sock_pair *relayd = NULL; |
fb3a43a9 | 1924 | int *splice_pipe; |
8994307f | 1925 | unsigned int relayd_hang_up = 0; |
f02e1e8a | 1926 | |
3bd1e081 MD |
1927 | switch (consumer_data.type) { |
1928 | case LTTNG_CONSUMER_KERNEL: | |
f02e1e8a | 1929 | break; |
7753dea8 MD |
1930 | case LTTNG_CONSUMER32_UST: |
1931 | case LTTNG_CONSUMER64_UST: | |
f02e1e8a | 1932 | /* Not supported for user space tracing */ |
3bd1e081 MD |
1933 | return -ENOSYS; |
1934 | default: | |
1935 | ERR("Unknown consumer_data type"); | |
1936 | assert(0); | |
3bd1e081 MD |
1937 | } |
1938 | ||
f02e1e8a DG |
1939 | /* RCU lock for the relayd pointer */ |
1940 | rcu_read_lock(); | |
1941 | ||
1942 | /* Flag that the current stream if set for network streaming. */ | |
da009f2c | 1943 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
f02e1e8a DG |
1944 | relayd = consumer_find_relayd(stream->net_seq_idx); |
1945 | if (relayd == NULL) { | |
ad0b0d23 | 1946 | written = -ret; |
f02e1e8a DG |
1947 | goto end; |
1948 | } | |
1949 | } | |
a2361a61 | 1950 | splice_pipe = stream->splice_pipe; |
fb3a43a9 | 1951 | |
f02e1e8a | 1952 | /* Write metadata stream id before payload */ |
1d4dfdef | 1953 | if (relayd) { |
ad0b0d23 | 1954 | unsigned long total_len = len; |
f02e1e8a | 1955 | |
1d4dfdef DG |
1956 | if (stream->metadata_flag) { |
1957 | /* | |
1958 | * Lock the control socket for the complete duration of the function | |
1959 | * since from this point on we will use the socket. | |
1960 | */ | |
1961 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
1962 | ||
93ec662e JD |
1963 | if (stream->reset_metadata_flag) { |
1964 | ret = relayd_reset_metadata(&relayd->control_sock, | |
1965 | stream->relayd_stream_id, | |
1966 | stream->metadata_version); | |
1967 | if (ret < 0) { | |
1968 | relayd_hang_up = 1; | |
1969 | goto write_error; | |
1970 | } | |
1971 | stream->reset_metadata_flag = 0; | |
1972 | } | |
239f61af | 1973 | ret = write_relayd_metadata_id(splice_pipe[1], stream, |
1d4dfdef DG |
1974 | padding); |
1975 | if (ret < 0) { | |
1976 | written = ret; | |
ad0b0d23 DG |
1977 | relayd_hang_up = 1; |
1978 | goto write_error; | |
1d4dfdef DG |
1979 | } |
1980 | ||
1981 | total_len += sizeof(struct lttcomm_relayd_metadata_payload); | |
1982 | } | |
1983 | ||
1984 | ret = write_relayd_stream_header(stream, total_len, padding, relayd); | |
ad0b0d23 DG |
1985 | if (ret < 0) { |
1986 | written = ret; | |
1987 | relayd_hang_up = 1; | |
1988 | goto write_error; | |
f02e1e8a | 1989 | } |
ad0b0d23 DG |
1990 | /* Use the returned socket. */ |
1991 | outfd = ret; | |
1d4dfdef DG |
1992 | } else { |
1993 | /* No streaming, we have to set the len with the full padding */ | |
1994 | len += padding; | |
1624d5b7 | 1995 | |
93ec662e JD |
1996 | if (stream->metadata_flag && stream->reset_metadata_flag) { |
1997 | ret = utils_truncate_stream_file(stream->out_fd, 0); | |
1998 | if (ret < 0) { | |
1999 | ERR("Reset metadata file"); | |
2000 | goto end; | |
2001 | } | |
2002 | stream->reset_metadata_flag = 0; | |
2003 | } | |
1624d5b7 JD |
2004 | /* |
2005 | * Check if we need to change the tracefile before writing the packet. | |
2006 | */ | |
2007 | if (stream->chan->tracefile_size > 0 && | |
2008 | (stream->tracefile_size_current + len) > | |
2009 | stream->chan->tracefile_size) { | |
d2956687 | 2010 | ret = consumer_stream_rotate_output_files(stream); |
1624d5b7 | 2011 | if (ret < 0) { |
ad0b0d23 | 2012 | written = ret; |
1624d5b7 JD |
2013 | goto end; |
2014 | } | |
309167d2 | 2015 | outfd = stream->out_fd; |
a1ae300f | 2016 | orig_offset = 0; |
1624d5b7 JD |
2017 | } |
2018 | stream->tracefile_size_current += len; | |
309167d2 | 2019 | index->offset = htobe64(stream->out_fd_offset); |
f02e1e8a DG |
2020 | } |
2021 | ||
2022 | while (len > 0) { | |
1d4dfdef DG |
2023 | DBG("splice chan to pipe offset %lu of len %lu (fd : %d, pipe: %d)", |
2024 | (unsigned long)offset, len, fd, splice_pipe[1]); | |
fb3a43a9 | 2025 | ret_splice = splice(fd, &offset, splice_pipe[1], NULL, len, |
f02e1e8a DG |
2026 | SPLICE_F_MOVE | SPLICE_F_MORE); |
2027 | DBG("splice chan to pipe, ret %zd", ret_splice); | |
2028 | if (ret_splice < 0) { | |
d02b8372 | 2029 | ret = errno; |
ad0b0d23 | 2030 | written = -ret; |
d02b8372 | 2031 | PERROR("Error in relay splice"); |
f02e1e8a DG |
2032 | goto splice_error; |
2033 | } | |
2034 | ||
2035 | /* Handle stream on the relayd if the output is on the network */ | |
ad0b0d23 DG |
2036 | if (relayd && stream->metadata_flag) { |
2037 | size_t metadata_payload_size = | |
2038 | sizeof(struct lttcomm_relayd_metadata_payload); | |
2039 | ||
2040 | /* Update counter to fit the spliced data */ | |
2041 | ret_splice += metadata_payload_size; | |
2042 | len += metadata_payload_size; | |
2043 | /* | |
2044 | * We do this so the return value can match the len passed as | |
2045 | * argument to this function. | |
2046 | */ | |
2047 | written -= metadata_payload_size; | |
f02e1e8a DG |
2048 | } |
2049 | ||
2050 | /* Splice data out */ | |
fb3a43a9 | 2051 | ret_splice = splice(splice_pipe[0], NULL, outfd, NULL, |
f02e1e8a | 2052 | ret_splice, SPLICE_F_MOVE | SPLICE_F_MORE); |
a2361a61 JD |
2053 | DBG("Consumer splice pipe to file (out_fd: %d), ret %zd", |
2054 | outfd, ret_splice); | |
f02e1e8a | 2055 | if (ret_splice < 0) { |
d02b8372 | 2056 | ret = errno; |
ad0b0d23 DG |
2057 | written = -ret; |
2058 | relayd_hang_up = 1; | |
2059 | goto write_error; | |
f02e1e8a | 2060 | } else if (ret_splice > len) { |
d02b8372 DG |
2061 | /* |
2062 | * We don't expect this code path to be executed but you never know | |
2063 | * so this is an extra protection agains a buggy splice(). | |
2064 | */ | |
f02e1e8a | 2065 | ret = errno; |
ad0b0d23 | 2066 | written += ret_splice; |
d02b8372 DG |
2067 | PERROR("Wrote more data than requested %zd (len: %lu)", ret_splice, |
2068 | len); | |
f02e1e8a | 2069 | goto splice_error; |
d02b8372 DG |
2070 | } else { |
2071 | /* All good, update current len and continue. */ | |
2072 | len -= ret_splice; | |
f02e1e8a | 2073 | } |
f02e1e8a DG |
2074 | |
2075 | /* This call is useless on a socket so better save a syscall. */ | |
2076 | if (!relayd) { | |
2077 | /* This won't block, but will start writeout asynchronously */ | |
2078 | lttng_sync_file_range(outfd, stream->out_fd_offset, ret_splice, | |
2079 | SYNC_FILE_RANGE_WRITE); | |
2080 | stream->out_fd_offset += ret_splice; | |
2081 | } | |
e5d1a9b3 | 2082 | stream->output_written += ret_splice; |
f02e1e8a DG |
2083 | written += ret_splice; |
2084 | } | |
f5dbe415 JG |
2085 | if (!relayd) { |
2086 | lttng_consumer_sync_trace_file(stream, orig_offset); | |
2087 | } | |
f02e1e8a DG |
2088 | goto end; |
2089 | ||
8994307f DG |
2090 | write_error: |
2091 | /* | |
2092 | * This is a special case that the relayd has closed its socket. Let's | |
2093 | * cleanup the relayd object and all associated streams. | |
2094 | */ | |
2095 | if (relayd && relayd_hang_up) { | |
9276e5c8 JR |
2096 | ERR("Relayd hangup. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
2097 | lttng_consumer_cleanup_relayd(relayd); | |
8994307f DG |
2098 | /* Skip splice error so the consumer does not fail */ |
2099 | goto end; | |
2100 | } | |
2101 | ||
f02e1e8a DG |
2102 | splice_error: |
2103 | /* send the appropriate error description to sessiond */ | |
2104 | switch (ret) { | |
f02e1e8a | 2105 | case EINVAL: |
f73fabfd | 2106 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_EINVAL); |
f02e1e8a DG |
2107 | break; |
2108 | case ENOMEM: | |
f73fabfd | 2109 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_ENOMEM); |
f02e1e8a DG |
2110 | break; |
2111 | case ESPIPE: | |
f73fabfd | 2112 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_ESPIPE); |
f02e1e8a DG |
2113 | break; |
2114 | } | |
2115 | ||
2116 | end: | |
2117 | if (relayd && stream->metadata_flag) { | |
2118 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
2119 | } | |
2120 | ||
2121 | rcu_read_unlock(); | |
2122 | return written; | |
3bd1e081 MD |
2123 | } |
2124 | ||
15055ce5 JD |
2125 | /* |
2126 | * Sample the snapshot positions for a specific fd | |
2127 | * | |
2128 | * Returns 0 on success, < 0 on error | |
2129 | */ | |
2130 | int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream *stream) | |
2131 | { | |
2132 | switch (consumer_data.type) { | |
2133 | case LTTNG_CONSUMER_KERNEL: | |
2134 | return lttng_kconsumer_sample_snapshot_positions(stream); | |
2135 | case LTTNG_CONSUMER32_UST: | |
2136 | case LTTNG_CONSUMER64_UST: | |
2137 | return lttng_ustconsumer_sample_snapshot_positions(stream); | |
2138 | default: | |
2139 | ERR("Unknown consumer_data type"); | |
2140 | assert(0); | |
2141 | return -ENOSYS; | |
2142 | } | |
2143 | } | |
3bd1e081 MD |
2144 | /* |
2145 | * Take a snapshot for a specific fd | |
2146 | * | |
2147 | * Returns 0 on success, < 0 on error | |
2148 | */ | |
ffe60014 | 2149 | int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
2150 | { |
2151 | switch (consumer_data.type) { | |
2152 | case LTTNG_CONSUMER_KERNEL: | |
ffe60014 | 2153 | return lttng_kconsumer_take_snapshot(stream); |
7753dea8 MD |
2154 | case LTTNG_CONSUMER32_UST: |
2155 | case LTTNG_CONSUMER64_UST: | |
ffe60014 | 2156 | return lttng_ustconsumer_take_snapshot(stream); |
3bd1e081 MD |
2157 | default: |
2158 | ERR("Unknown consumer_data type"); | |
2159 | assert(0); | |
2160 | return -ENOSYS; | |
2161 | } | |
3bd1e081 MD |
2162 | } |
2163 | ||
2164 | /* | |
2165 | * Get the produced position | |
2166 | * | |
2167 | * Returns 0 on success, < 0 on error | |
2168 | */ | |
ffe60014 | 2169 | int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
2170 | unsigned long *pos) |
2171 | { | |
2172 | switch (consumer_data.type) { | |
2173 | case LTTNG_CONSUMER_KERNEL: | |
ffe60014 | 2174 | return lttng_kconsumer_get_produced_snapshot(stream, pos); |
7753dea8 MD |
2175 | case LTTNG_CONSUMER32_UST: |
2176 | case LTTNG_CONSUMER64_UST: | |
ffe60014 | 2177 | return lttng_ustconsumer_get_produced_snapshot(stream, pos); |
3bd1e081 MD |
2178 | default: |
2179 | ERR("Unknown consumer_data type"); | |
2180 | assert(0); | |
2181 | return -ENOSYS; | |
2182 | } | |
2183 | } | |
2184 | ||
15055ce5 JD |
2185 | /* |
2186 | * Get the consumed position (free-running counter position in bytes). | |
2187 | * | |
2188 | * Returns 0 on success, < 0 on error | |
2189 | */ | |
2190 | int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
2191 | unsigned long *pos) | |
2192 | { | |
2193 | switch (consumer_data.type) { | |
2194 | case LTTNG_CONSUMER_KERNEL: | |
2195 | return lttng_kconsumer_get_consumed_snapshot(stream, pos); | |
2196 | case LTTNG_CONSUMER32_UST: | |
2197 | case LTTNG_CONSUMER64_UST: | |
2198 | return lttng_ustconsumer_get_consumed_snapshot(stream, pos); | |
2199 | default: | |
2200 | ERR("Unknown consumer_data type"); | |
2201 | assert(0); | |
2202 | return -ENOSYS; | |
2203 | } | |
2204 | } | |
2205 | ||
3bd1e081 MD |
2206 | int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
2207 | int sock, struct pollfd *consumer_sockpoll) | |
2208 | { | |
2209 | switch (consumer_data.type) { | |
2210 | case LTTNG_CONSUMER_KERNEL: | |
2211 | return lttng_kconsumer_recv_cmd(ctx, sock, consumer_sockpoll); | |
7753dea8 MD |
2212 | case LTTNG_CONSUMER32_UST: |
2213 | case LTTNG_CONSUMER64_UST: | |
3bd1e081 MD |
2214 | return lttng_ustconsumer_recv_cmd(ctx, sock, consumer_sockpoll); |
2215 | default: | |
2216 | ERR("Unknown consumer_data type"); | |
2217 | assert(0); | |
2218 | return -ENOSYS; | |
2219 | } | |
2220 | } | |
2221 | ||
6d574024 | 2222 | void lttng_consumer_close_all_metadata(void) |
d88aee68 DG |
2223 | { |
2224 | switch (consumer_data.type) { | |
2225 | case LTTNG_CONSUMER_KERNEL: | |
2226 | /* | |
2227 | * The Kernel consumer has a different metadata scheme so we don't | |
2228 | * close anything because the stream will be closed by the session | |
2229 | * daemon. | |
2230 | */ | |
2231 | break; | |
2232 | case LTTNG_CONSUMER32_UST: | |
2233 | case LTTNG_CONSUMER64_UST: | |
2234 | /* | |
2235 | * Close all metadata streams. The metadata hash table is passed and | |
2236 | * this call iterates over it by closing all wakeup fd. This is safe | |
2237 | * because at this point we are sure that the metadata producer is | |
2238 | * either dead or blocked. | |
2239 | */ | |
6d574024 | 2240 | lttng_ustconsumer_close_all_metadata(metadata_ht); |
d88aee68 DG |
2241 | break; |
2242 | default: | |
2243 | ERR("Unknown consumer_data type"); | |
2244 | assert(0); | |
2245 | } | |
2246 | } | |
2247 | ||
fb3a43a9 DG |
2248 | /* |
2249 | * Clean up a metadata stream and free its memory. | |
2250 | */ | |
e316aad5 DG |
2251 | void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, |
2252 | struct lttng_ht *ht) | |
fb3a43a9 | 2253 | { |
e316aad5 | 2254 | struct lttng_consumer_channel *free_chan = NULL; |
fb3a43a9 DG |
2255 | |
2256 | assert(stream); | |
2257 | /* | |
2258 | * This call should NEVER receive regular stream. It must always be | |
2259 | * metadata stream and this is crucial for data structure synchronization. | |
2260 | */ | |
2261 | assert(stream->metadata_flag); | |
2262 | ||
e316aad5 DG |
2263 | DBG3("Consumer delete metadata stream %d", stream->wait_fd); |
2264 | ||
74251bb8 | 2265 | pthread_mutex_lock(&consumer_data.lock); |
fb549e7a | 2266 | pthread_mutex_lock(&stream->chan->lock); |
3dad2c0f | 2267 | pthread_mutex_lock(&stream->lock); |
081424af JG |
2268 | if (stream->chan->metadata_cache) { |
2269 | /* Only applicable to userspace consumers. */ | |
2270 | pthread_mutex_lock(&stream->chan->metadata_cache->lock); | |
2271 | } | |
8994307f | 2272 | |
6d574024 DG |
2273 | /* Remove any reference to that stream. */ |
2274 | consumer_stream_delete(stream, ht); | |
ca22feea | 2275 | |
6d574024 DG |
2276 | /* Close down everything including the relayd if one. */ |
2277 | consumer_stream_close(stream); | |
2278 | /* Destroy tracer buffers of the stream. */ | |
2279 | consumer_stream_destroy_buffers(stream); | |
fb3a43a9 DG |
2280 | |
2281 | /* Atomically decrement channel refcount since other threads can use it. */ | |
f2ad556d | 2282 | if (!uatomic_sub_return(&stream->chan->refcount, 1) |
ffe60014 | 2283 | && !uatomic_read(&stream->chan->nb_init_stream_left)) { |
c30aaa51 | 2284 | /* Go for channel deletion! */ |
e316aad5 | 2285 | free_chan = stream->chan; |
fb3a43a9 DG |
2286 | } |
2287 | ||
73811ecc DG |
2288 | /* |
2289 | * Nullify the stream reference so it is not used after deletion. The | |
6d574024 DG |
2290 | * channel lock MUST be acquired before being able to check for a NULL |
2291 | * pointer value. | |
73811ecc DG |
2292 | */ |
2293 | stream->chan->metadata_stream = NULL; | |
2294 | ||
081424af JG |
2295 | if (stream->chan->metadata_cache) { |
2296 | pthread_mutex_unlock(&stream->chan->metadata_cache->lock); | |
2297 | } | |
3dad2c0f | 2298 | pthread_mutex_unlock(&stream->lock); |
fb549e7a | 2299 | pthread_mutex_unlock(&stream->chan->lock); |
74251bb8 | 2300 | pthread_mutex_unlock(&consumer_data.lock); |
e316aad5 DG |
2301 | |
2302 | if (free_chan) { | |
2303 | consumer_del_channel(free_chan); | |
2304 | } | |
2305 | ||
d2956687 JG |
2306 | lttng_trace_chunk_put(stream->trace_chunk); |
2307 | stream->trace_chunk = NULL; | |
6d574024 | 2308 | consumer_stream_free(stream); |
fb3a43a9 DG |
2309 | } |
2310 | ||
2311 | /* | |
2312 | * Action done with the metadata stream when adding it to the consumer internal | |
2313 | * data structures to handle it. | |
2314 | */ | |
66d583dc | 2315 | void consumer_add_metadata_stream(struct lttng_consumer_stream *stream) |
fb3a43a9 | 2316 | { |
5ab66908 | 2317 | struct lttng_ht *ht = metadata_ht; |
76082088 | 2318 | struct lttng_ht_iter iter; |
d88aee68 | 2319 | struct lttng_ht_node_u64 *node; |
fb3a43a9 | 2320 | |
e316aad5 DG |
2321 | assert(stream); |
2322 | assert(ht); | |
2323 | ||
d88aee68 | 2324 | DBG3("Adding metadata stream %" PRIu64 " to hash table", stream->key); |
e316aad5 DG |
2325 | |
2326 | pthread_mutex_lock(&consumer_data.lock); | |
a9838785 | 2327 | pthread_mutex_lock(&stream->chan->lock); |
ec6ea7d0 | 2328 | pthread_mutex_lock(&stream->chan->timer_lock); |
2e818a6a | 2329 | pthread_mutex_lock(&stream->lock); |
e316aad5 | 2330 | |
e316aad5 DG |
2331 | /* |
2332 | * From here, refcounts are updated so be _careful_ when returning an error | |
2333 | * after this point. | |
2334 | */ | |
2335 | ||
fb3a43a9 | 2336 | rcu_read_lock(); |
76082088 DG |
2337 | |
2338 | /* | |
2339 | * Lookup the stream just to make sure it does not exist in our internal | |
2340 | * state. This should NEVER happen. | |
2341 | */ | |
d88aee68 DG |
2342 | lttng_ht_lookup(ht, &stream->key, &iter); |
2343 | node = lttng_ht_iter_get_node_u64(&iter); | |
76082088 DG |
2344 | assert(!node); |
2345 | ||
e316aad5 | 2346 | /* |
ffe60014 DG |
2347 | * When nb_init_stream_left reaches 0, we don't need to trigger any action |
2348 | * in terms of destroying the associated channel, because the action that | |
e316aad5 DG |
2349 | * causes the count to become 0 also causes a stream to be added. The |
2350 | * channel deletion will thus be triggered by the following removal of this | |
2351 | * stream. | |
2352 | */ | |
ffe60014 | 2353 | if (uatomic_read(&stream->chan->nb_init_stream_left) > 0) { |
f2ad556d MD |
2354 | /* Increment refcount before decrementing nb_init_stream_left */ |
2355 | cmm_smp_wmb(); | |
ffe60014 | 2356 | uatomic_dec(&stream->chan->nb_init_stream_left); |
e316aad5 DG |
2357 | } |
2358 | ||
d88aee68 | 2359 | lttng_ht_add_unique_u64(ht, &stream->node); |
ca22feea | 2360 | |
446156b4 | 2361 | lttng_ht_add_u64(consumer_data.stream_per_chan_id_ht, |
d8ef542d MD |
2362 | &stream->node_channel_id); |
2363 | ||
ca22feea DG |
2364 | /* |
2365 | * Add stream to the stream_list_ht of the consumer data. No need to steal | |
2366 | * the key since the HT does not use it and we allow to add redundant keys | |
2367 | * into this table. | |
2368 | */ | |
d88aee68 | 2369 | lttng_ht_add_u64(consumer_data.stream_list_ht, &stream->node_session_id); |
ca22feea | 2370 | |
fb3a43a9 | 2371 | rcu_read_unlock(); |
e316aad5 | 2372 | |
2e818a6a | 2373 | pthread_mutex_unlock(&stream->lock); |
a9838785 | 2374 | pthread_mutex_unlock(&stream->chan->lock); |
ec6ea7d0 | 2375 | pthread_mutex_unlock(&stream->chan->timer_lock); |
e316aad5 | 2376 | pthread_mutex_unlock(&consumer_data.lock); |
fb3a43a9 DG |
2377 | } |
2378 | ||
8994307f DG |
2379 | /* |
2380 | * Delete data stream that are flagged for deletion (endpoint_status). | |
2381 | */ | |
2382 | static void validate_endpoint_status_data_stream(void) | |
2383 | { | |
2384 | struct lttng_ht_iter iter; | |
2385 | struct lttng_consumer_stream *stream; | |
2386 | ||
2387 | DBG("Consumer delete flagged data stream"); | |
2388 | ||
2389 | rcu_read_lock(); | |
2390 | cds_lfht_for_each_entry(data_ht->ht, &iter.iter, stream, node.node) { | |
2391 | /* Validate delete flag of the stream */ | |
79d4ffb7 | 2392 | if (stream->endpoint_status == CONSUMER_ENDPOINT_ACTIVE) { |
8994307f DG |
2393 | continue; |
2394 | } | |
2395 | /* Delete it right now */ | |
2396 | consumer_del_stream(stream, data_ht); | |
2397 | } | |
2398 | rcu_read_unlock(); | |
2399 | } | |
2400 | ||
2401 | /* | |
2402 | * Delete metadata stream that are flagged for deletion (endpoint_status). | |
2403 | */ | |
2404 | static void validate_endpoint_status_metadata_stream( | |
2405 | struct lttng_poll_event *pollset) | |
2406 | { | |
2407 | struct lttng_ht_iter iter; | |
2408 | struct lttng_consumer_stream *stream; | |
2409 | ||
2410 | DBG("Consumer delete flagged metadata stream"); | |
2411 | ||
2412 | assert(pollset); | |
2413 | ||
2414 | rcu_read_lock(); | |
2415 | cds_lfht_for_each_entry(metadata_ht->ht, &iter.iter, stream, node.node) { | |
2416 | /* Validate delete flag of the stream */ | |
79d4ffb7 | 2417 | if (stream->endpoint_status == CONSUMER_ENDPOINT_ACTIVE) { |
8994307f DG |
2418 | continue; |
2419 | } | |
2420 | /* | |
2421 | * Remove from pollset so the metadata thread can continue without | |
2422 | * blocking on a deleted stream. | |
2423 | */ | |
2424 | lttng_poll_del(pollset, stream->wait_fd); | |
2425 | ||
2426 | /* Delete it right now */ | |
2427 | consumer_del_metadata_stream(stream, metadata_ht); | |
2428 | } | |
2429 | rcu_read_unlock(); | |
2430 | } | |
2431 | ||
fb3a43a9 DG |
2432 | /* |
2433 | * Thread polls on metadata file descriptor and write them on disk or on the | |
2434 | * network. | |
2435 | */ | |
7d980def | 2436 | void *consumer_thread_metadata_poll(void *data) |
fb3a43a9 | 2437 | { |
1fc79fb4 | 2438 | int ret, i, pollfd, err = -1; |
fb3a43a9 | 2439 | uint32_t revents, nb_fd; |
e316aad5 | 2440 | struct lttng_consumer_stream *stream = NULL; |
fb3a43a9 | 2441 | struct lttng_ht_iter iter; |
d88aee68 | 2442 | struct lttng_ht_node_u64 *node; |
fb3a43a9 DG |
2443 | struct lttng_poll_event events; |
2444 | struct lttng_consumer_local_data *ctx = data; | |
2445 | ssize_t len; | |
2446 | ||
2447 | rcu_register_thread(); | |
2448 | ||
1fc79fb4 MD |
2449 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_METADATA); |
2450 | ||
2d57de81 MD |
2451 | if (testpoint(consumerd_thread_metadata)) { |
2452 | goto error_testpoint; | |
2453 | } | |
2454 | ||
9ce5646a MD |
2455 | health_code_update(); |
2456 | ||
fb3a43a9 DG |
2457 | DBG("Thread metadata poll started"); |
2458 | ||
fb3a43a9 DG |
2459 | /* Size is set to 1 for the consumer_metadata pipe */ |
2460 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
2461 | if (ret < 0) { | |
2462 | ERR("Poll set creation failed"); | |
d8ef542d | 2463 | goto end_poll; |
fb3a43a9 DG |
2464 | } |
2465 | ||
13886d2d DG |
2466 | ret = lttng_poll_add(&events, |
2467 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe), LPOLLIN); | |
fb3a43a9 DG |
2468 | if (ret < 0) { |
2469 | goto end; | |
2470 | } | |
2471 | ||
2472 | /* Main loop */ | |
2473 | DBG("Metadata main loop started"); | |
2474 | ||
2475 | while (1) { | |
fb3a43a9 | 2476 | restart: |
7fa2082e | 2477 | health_code_update(); |
9ce5646a | 2478 | health_poll_entry(); |
7fa2082e | 2479 | DBG("Metadata poll wait"); |
fb3a43a9 | 2480 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
2481 | DBG("Metadata poll return from wait with %d fd(s)", |
2482 | LTTNG_POLL_GETNB(&events)); | |
9ce5646a | 2483 | health_poll_exit(); |
40063ead | 2484 | DBG("Metadata event caught in thread"); |
fb3a43a9 DG |
2485 | if (ret < 0) { |
2486 | if (errno == EINTR) { | |
40063ead | 2487 | ERR("Poll EINTR caught"); |
fb3a43a9 DG |
2488 | goto restart; |
2489 | } | |
d9607cd7 MD |
2490 | if (LTTNG_POLL_GETNB(&events) == 0) { |
2491 | err = 0; /* All is OK */ | |
2492 | } | |
2493 | goto end; | |
fb3a43a9 DG |
2494 | } |
2495 | ||
0d9c5d77 DG |
2496 | nb_fd = ret; |
2497 | ||
e316aad5 | 2498 | /* From here, the event is a metadata wait fd */ |
fb3a43a9 | 2499 | for (i = 0; i < nb_fd; i++) { |
9ce5646a MD |
2500 | health_code_update(); |
2501 | ||
fb3a43a9 DG |
2502 | revents = LTTNG_POLL_GETEV(&events, i); |
2503 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2504 | ||
13886d2d | 2505 | if (pollfd == lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)) { |
03e43155 | 2506 | if (revents & LPOLLIN) { |
13886d2d DG |
2507 | ssize_t pipe_len; |
2508 | ||
2509 | pipe_len = lttng_pipe_read(ctx->consumer_metadata_pipe, | |
2510 | &stream, sizeof(stream)); | |
6cd525e8 | 2511 | if (pipe_len < sizeof(stream)) { |
03e43155 MD |
2512 | if (pipe_len < 0) { |
2513 | PERROR("read metadata stream"); | |
2514 | } | |
fb3a43a9 | 2515 | /* |
03e43155 MD |
2516 | * Remove the pipe from the poll set and continue the loop |
2517 | * since their might be data to consume. | |
fb3a43a9 | 2518 | */ |
03e43155 MD |
2519 | lttng_poll_del(&events, |
2520 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)); | |
2521 | lttng_pipe_read_close(ctx->consumer_metadata_pipe); | |
fb3a43a9 DG |
2522 | continue; |
2523 | } | |
2524 | ||
8994307f DG |
2525 | /* A NULL stream means that the state has changed. */ |
2526 | if (stream == NULL) { | |
2527 | /* Check for deleted streams. */ | |
2528 | validate_endpoint_status_metadata_stream(&events); | |
3714380f | 2529 | goto restart; |
8994307f DG |
2530 | } |
2531 | ||
fb3a43a9 DG |
2532 | DBG("Adding metadata stream %d to poll set", |
2533 | stream->wait_fd); | |
2534 | ||
fb3a43a9 DG |
2535 | /* Add metadata stream to the global poll events list */ |
2536 | lttng_poll_add(&events, stream->wait_fd, | |
6d574024 | 2537 | LPOLLIN | LPOLLPRI | LPOLLHUP); |
03e43155 MD |
2538 | } else if (revents & (LPOLLERR | LPOLLHUP)) { |
2539 | DBG("Metadata thread pipe hung up"); | |
2540 | /* | |
2541 | * Remove the pipe from the poll set and continue the loop | |
2542 | * since their might be data to consume. | |
2543 | */ | |
2544 | lttng_poll_del(&events, | |
2545 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)); | |
2546 | lttng_pipe_read_close(ctx->consumer_metadata_pipe); | |
2547 | continue; | |
2548 | } else { | |
2549 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2550 | goto end; | |
fb3a43a9 DG |
2551 | } |
2552 | ||
e316aad5 | 2553 | /* Handle other stream */ |
fb3a43a9 DG |
2554 | continue; |
2555 | } | |
2556 | ||
d09e1200 | 2557 | rcu_read_lock(); |
d88aee68 DG |
2558 | { |
2559 | uint64_t tmp_id = (uint64_t) pollfd; | |
2560 | ||
2561 | lttng_ht_lookup(metadata_ht, &tmp_id, &iter); | |
2562 | } | |
2563 | node = lttng_ht_iter_get_node_u64(&iter); | |
e316aad5 | 2564 | assert(node); |
fb3a43a9 DG |
2565 | |
2566 | stream = caa_container_of(node, struct lttng_consumer_stream, | |
58b1f425 | 2567 | node); |
fb3a43a9 | 2568 | |
03e43155 MD |
2569 | if (revents & (LPOLLIN | LPOLLPRI)) { |
2570 | /* Get the data out of the metadata file descriptor */ | |
2571 | DBG("Metadata available on fd %d", pollfd); | |
2572 | assert(stream->wait_fd == pollfd); | |
2573 | ||
2574 | do { | |
2575 | health_code_update(); | |
2576 | ||
2577 | len = ctx->on_buffer_ready(stream, ctx); | |
2578 | /* | |
2579 | * We don't check the return value here since if we get | |
83f4233d | 2580 | * a negative len, it means an error occurred thus we |
03e43155 MD |
2581 | * simply remove it from the poll set and free the |
2582 | * stream. | |
2583 | */ | |
2584 | } while (len > 0); | |
2585 | ||
2586 | /* It's ok to have an unavailable sub-buffer */ | |
2587 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { | |
2588 | /* Clean up stream from consumer and free it. */ | |
2589 | lttng_poll_del(&events, stream->wait_fd); | |
2590 | consumer_del_metadata_stream(stream, metadata_ht); | |
2591 | } | |
2592 | } else if (revents & (LPOLLERR | LPOLLHUP)) { | |
e316aad5 | 2593 | DBG("Metadata fd %d is hup|err.", pollfd); |
fb3a43a9 DG |
2594 | if (!stream->hangup_flush_done |
2595 | && (consumer_data.type == LTTNG_CONSUMER32_UST | |
2596 | || consumer_data.type == LTTNG_CONSUMER64_UST)) { | |
2597 | DBG("Attempting to flush and consume the UST buffers"); | |
2598 | lttng_ustconsumer_on_stream_hangup(stream); | |
2599 | ||
2600 | /* We just flushed the stream now read it. */ | |
4bb94b75 | 2601 | do { |
9ce5646a MD |
2602 | health_code_update(); |
2603 | ||
4bb94b75 DG |
2604 | len = ctx->on_buffer_ready(stream, ctx); |
2605 | /* | |
2606 | * We don't check the return value here since if we get | |
83f4233d | 2607 | * a negative len, it means an error occurred thus we |
4bb94b75 DG |
2608 | * simply remove it from the poll set and free the |
2609 | * stream. | |
2610 | */ | |
2611 | } while (len > 0); | |
fb3a43a9 DG |
2612 | } |
2613 | ||
fb3a43a9 | 2614 | lttng_poll_del(&events, stream->wait_fd); |
e316aad5 DG |
2615 | /* |
2616 | * This call update the channel states, closes file descriptors | |
2617 | * and securely free the stream. | |
2618 | */ | |
2619 | consumer_del_metadata_stream(stream, metadata_ht); | |
03e43155 MD |
2620 | } else { |
2621 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
6f2f1a70 | 2622 | rcu_read_unlock(); |
03e43155 | 2623 | goto end; |
fb3a43a9 | 2624 | } |
e316aad5 | 2625 | /* Release RCU lock for the stream looked up */ |
d09e1200 | 2626 | rcu_read_unlock(); |
fb3a43a9 DG |
2627 | } |
2628 | } | |
2629 | ||
1fc79fb4 MD |
2630 | /* All is OK */ |
2631 | err = 0; | |
fb3a43a9 DG |
2632 | end: |
2633 | DBG("Metadata poll thread exiting"); | |
fb3a43a9 | 2634 | |
d8ef542d MD |
2635 | lttng_poll_clean(&events); |
2636 | end_poll: | |
2d57de81 | 2637 | error_testpoint: |
1fc79fb4 MD |
2638 | if (err) { |
2639 | health_error(); | |
2640 | ERR("Health error occurred in %s", __func__); | |
2641 | } | |
2642 | health_unregister(health_consumerd); | |
fb3a43a9 DG |
2643 | rcu_unregister_thread(); |
2644 | return NULL; | |
2645 | } | |
2646 | ||
3bd1e081 | 2647 | /* |
e4421fec | 2648 | * This thread polls the fds in the set to consume the data and write |
3bd1e081 MD |
2649 | * it to tracefile if necessary. |
2650 | */ | |
7d980def | 2651 | void *consumer_thread_data_poll(void *data) |
3bd1e081 | 2652 | { |
1fc79fb4 | 2653 | int num_rdy, num_hup, high_prio, ret, i, err = -1; |
3bd1e081 MD |
2654 | struct pollfd *pollfd = NULL; |
2655 | /* local view of the streams */ | |
c869f647 | 2656 | struct lttng_consumer_stream **local_stream = NULL, *new_stream = NULL; |
3bd1e081 | 2657 | /* local view of consumer_data.fds_count */ |
8bdcc002 JG |
2658 | int nb_fd = 0; |
2659 | /* 2 for the consumer_data_pipe and wake up pipe */ | |
2660 | const int nb_pipes_fd = 2; | |
9a2fcf78 JD |
2661 | /* Number of FDs with CONSUMER_ENDPOINT_INACTIVE but still open. */ |
2662 | int nb_inactive_fd = 0; | |
3bd1e081 | 2663 | struct lttng_consumer_local_data *ctx = data; |
00e2e675 | 2664 | ssize_t len; |
3bd1e081 | 2665 | |
e7b994a3 DG |
2666 | rcu_register_thread(); |
2667 | ||
1fc79fb4 MD |
2668 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_DATA); |
2669 | ||
2d57de81 MD |
2670 | if (testpoint(consumerd_thread_data)) { |
2671 | goto error_testpoint; | |
2672 | } | |
2673 | ||
9ce5646a MD |
2674 | health_code_update(); |
2675 | ||
4df6c8cb MD |
2676 | local_stream = zmalloc(sizeof(struct lttng_consumer_stream *)); |
2677 | if (local_stream == NULL) { | |
2678 | PERROR("local_stream malloc"); | |
2679 | goto end; | |
2680 | } | |
3bd1e081 MD |
2681 | |
2682 | while (1) { | |
9ce5646a MD |
2683 | health_code_update(); |
2684 | ||
3bd1e081 MD |
2685 | high_prio = 0; |
2686 | num_hup = 0; | |
2687 | ||
2688 | /* | |
e4421fec | 2689 | * the fds set has been updated, we need to update our |
3bd1e081 MD |
2690 | * local array as well |
2691 | */ | |
2692 | pthread_mutex_lock(&consumer_data.lock); | |
2693 | if (consumer_data.need_update) { | |
0e428499 DG |
2694 | free(pollfd); |
2695 | pollfd = NULL; | |
2696 | ||
2697 | free(local_stream); | |
2698 | local_stream = NULL; | |
3bd1e081 | 2699 | |
8bdcc002 | 2700 | /* Allocate for all fds */ |
261de637 | 2701 | pollfd = zmalloc((consumer_data.stream_count + nb_pipes_fd) * sizeof(struct pollfd)); |
3bd1e081 | 2702 | if (pollfd == NULL) { |
7a57cf92 | 2703 | PERROR("pollfd malloc"); |
3bd1e081 MD |
2704 | pthread_mutex_unlock(&consumer_data.lock); |
2705 | goto end; | |
2706 | } | |
2707 | ||
261de637 | 2708 | local_stream = zmalloc((consumer_data.stream_count + nb_pipes_fd) * |
747f8642 | 2709 | sizeof(struct lttng_consumer_stream *)); |
3bd1e081 | 2710 | if (local_stream == NULL) { |
7a57cf92 | 2711 | PERROR("local_stream malloc"); |
3bd1e081 MD |
2712 | pthread_mutex_unlock(&consumer_data.lock); |
2713 | goto end; | |
2714 | } | |
ffe60014 | 2715 | ret = update_poll_array(ctx, &pollfd, local_stream, |
9a2fcf78 | 2716 | data_ht, &nb_inactive_fd); |
3bd1e081 MD |
2717 | if (ret < 0) { |
2718 | ERR("Error in allocating pollfd or local_outfds"); | |
f73fabfd | 2719 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
3bd1e081 MD |
2720 | pthread_mutex_unlock(&consumer_data.lock); |
2721 | goto end; | |
2722 | } | |
2723 | nb_fd = ret; | |
2724 | consumer_data.need_update = 0; | |
2725 | } | |
2726 | pthread_mutex_unlock(&consumer_data.lock); | |
2727 | ||
4078b776 | 2728 | /* No FDs and consumer_quit, consumer_cleanup the thread */ |
9a2fcf78 JD |
2729 | if (nb_fd == 0 && nb_inactive_fd == 0 && |
2730 | CMM_LOAD_SHARED(consumer_quit) == 1) { | |
1fc79fb4 | 2731 | err = 0; /* All is OK */ |
4078b776 MD |
2732 | goto end; |
2733 | } | |
3bd1e081 | 2734 | /* poll on the array of fds */ |
88f2b785 | 2735 | restart: |
261de637 | 2736 | DBG("polling on %d fd", nb_fd + nb_pipes_fd); |
cf0bcb51 JG |
2737 | if (testpoint(consumerd_thread_data_poll)) { |
2738 | goto end; | |
2739 | } | |
9ce5646a | 2740 | health_poll_entry(); |
261de637 | 2741 | num_rdy = poll(pollfd, nb_fd + nb_pipes_fd, -1); |
9ce5646a | 2742 | health_poll_exit(); |
3bd1e081 MD |
2743 | DBG("poll num_rdy : %d", num_rdy); |
2744 | if (num_rdy == -1) { | |
88f2b785 MD |
2745 | /* |
2746 | * Restart interrupted system call. | |
2747 | */ | |
2748 | if (errno == EINTR) { | |
2749 | goto restart; | |
2750 | } | |
7a57cf92 | 2751 | PERROR("Poll error"); |
f73fabfd | 2752 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
3bd1e081 MD |
2753 | goto end; |
2754 | } else if (num_rdy == 0) { | |
2755 | DBG("Polling thread timed out"); | |
2756 | goto end; | |
2757 | } | |
2758 | ||
80957876 JG |
2759 | if (caa_unlikely(data_consumption_paused)) { |
2760 | DBG("Data consumption paused, sleeping..."); | |
2761 | sleep(1); | |
2762 | goto restart; | |
2763 | } | |
2764 | ||
3bd1e081 | 2765 | /* |
50f8ae69 | 2766 | * If the consumer_data_pipe triggered poll go directly to the |
00e2e675 DG |
2767 | * beginning of the loop to update the array. We want to prioritize |
2768 | * array update over low-priority reads. | |
3bd1e081 | 2769 | */ |
509bb1cf | 2770 | if (pollfd[nb_fd].revents & (POLLIN | POLLPRI)) { |
ab30f567 | 2771 | ssize_t pipe_readlen; |
04fdd819 | 2772 | |
50f8ae69 | 2773 | DBG("consumer_data_pipe wake up"); |
acdb9057 DG |
2774 | pipe_readlen = lttng_pipe_read(ctx->consumer_data_pipe, |
2775 | &new_stream, sizeof(new_stream)); | |
6cd525e8 MD |
2776 | if (pipe_readlen < sizeof(new_stream)) { |
2777 | PERROR("Consumer data pipe"); | |
23f5f35d DG |
2778 | /* Continue so we can at least handle the current stream(s). */ |
2779 | continue; | |
2780 | } | |
c869f647 DG |
2781 | |
2782 | /* | |
2783 | * If the stream is NULL, just ignore it. It's also possible that | |
2784 | * the sessiond poll thread changed the consumer_quit state and is | |
2785 | * waking us up to test it. | |
2786 | */ | |
2787 | if (new_stream == NULL) { | |
8994307f | 2788 | validate_endpoint_status_data_stream(); |
c869f647 DG |
2789 | continue; |
2790 | } | |
2791 | ||
c869f647 | 2792 | /* Continue to update the local streams and handle prio ones */ |
3bd1e081 MD |
2793 | continue; |
2794 | } | |
2795 | ||
02b3d176 DG |
2796 | /* Handle wakeup pipe. */ |
2797 | if (pollfd[nb_fd + 1].revents & (POLLIN | POLLPRI)) { | |
2798 | char dummy; | |
2799 | ssize_t pipe_readlen; | |
2800 | ||
2801 | pipe_readlen = lttng_pipe_read(ctx->consumer_wakeup_pipe, &dummy, | |
2802 | sizeof(dummy)); | |
2803 | if (pipe_readlen < 0) { | |
2804 | PERROR("Consumer data wakeup pipe"); | |
2805 | } | |
2806 | /* We've been awakened to handle stream(s). */ | |
2807 | ctx->has_wakeup = 0; | |
2808 | } | |
2809 | ||
3bd1e081 MD |
2810 | /* Take care of high priority channels first. */ |
2811 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2812 | health_code_update(); |
2813 | ||
9617607b DG |
2814 | if (local_stream[i] == NULL) { |
2815 | continue; | |
2816 | } | |
fb3a43a9 | 2817 | if (pollfd[i].revents & POLLPRI) { |
d41f73b7 MD |
2818 | DBG("Urgent read on fd %d", pollfd[i].fd); |
2819 | high_prio = 1; | |
4078b776 | 2820 | len = ctx->on_buffer_ready(local_stream[i], ctx); |
d41f73b7 | 2821 | /* it's ok to have an unavailable sub-buffer */ |
b64403e3 | 2822 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { |
ab1027f4 DG |
2823 | /* Clean the stream and free it. */ |
2824 | consumer_del_stream(local_stream[i], data_ht); | |
9617607b | 2825 | local_stream[i] = NULL; |
4078b776 MD |
2826 | } else if (len > 0) { |
2827 | local_stream[i]->data_read = 1; | |
d41f73b7 | 2828 | } |
3bd1e081 MD |
2829 | } |
2830 | } | |
2831 | ||
4078b776 MD |
2832 | /* |
2833 | * If we read high prio channel in this loop, try again | |
2834 | * for more high prio data. | |
2835 | */ | |
2836 | if (high_prio) { | |
3bd1e081 MD |
2837 | continue; |
2838 | } | |
2839 | ||
2840 | /* Take care of low priority channels. */ | |
4078b776 | 2841 | for (i = 0; i < nb_fd; i++) { |
9ce5646a MD |
2842 | health_code_update(); |
2843 | ||
9617607b DG |
2844 | if (local_stream[i] == NULL) { |
2845 | continue; | |
2846 | } | |
4078b776 | 2847 | if ((pollfd[i].revents & POLLIN) || |
02b3d176 DG |
2848 | local_stream[i]->hangup_flush_done || |
2849 | local_stream[i]->has_data) { | |
4078b776 MD |
2850 | DBG("Normal read on fd %d", pollfd[i].fd); |
2851 | len = ctx->on_buffer_ready(local_stream[i], ctx); | |
2852 | /* it's ok to have an unavailable sub-buffer */ | |
b64403e3 | 2853 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { |
ab1027f4 DG |
2854 | /* Clean the stream and free it. */ |
2855 | consumer_del_stream(local_stream[i], data_ht); | |
9617607b | 2856 | local_stream[i] = NULL; |
4078b776 MD |
2857 | } else if (len > 0) { |
2858 | local_stream[i]->data_read = 1; | |
2859 | } | |
2860 | } | |
2861 | } | |
2862 | ||
2863 | /* Handle hangup and errors */ | |
2864 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2865 | health_code_update(); |
2866 | ||
9617607b DG |
2867 | if (local_stream[i] == NULL) { |
2868 | continue; | |
2869 | } | |
4078b776 MD |
2870 | if (!local_stream[i]->hangup_flush_done |
2871 | && (pollfd[i].revents & (POLLHUP | POLLERR | POLLNVAL)) | |
2872 | && (consumer_data.type == LTTNG_CONSUMER32_UST | |
2873 | || consumer_data.type == LTTNG_CONSUMER64_UST)) { | |
2874 | DBG("fd %d is hup|err|nval. Attempting flush and read.", | |
9617607b | 2875 | pollfd[i].fd); |
4078b776 MD |
2876 | lttng_ustconsumer_on_stream_hangup(local_stream[i]); |
2877 | /* Attempt read again, for the data we just flushed. */ | |
2878 | local_stream[i]->data_read = 1; | |
2879 | } | |
2880 | /* | |
2881 | * If the poll flag is HUP/ERR/NVAL and we have | |
2882 | * read no data in this pass, we can remove the | |
2883 | * stream from its hash table. | |
2884 | */ | |
2885 | if ((pollfd[i].revents & POLLHUP)) { | |
2886 | DBG("Polling fd %d tells it has hung up.", pollfd[i].fd); | |
2887 | if (!local_stream[i]->data_read) { | |
43c34bc3 | 2888 | consumer_del_stream(local_stream[i], data_ht); |
9617607b | 2889 | local_stream[i] = NULL; |
4078b776 MD |
2890 | num_hup++; |
2891 | } | |
2892 | } else if (pollfd[i].revents & POLLERR) { | |
2893 | ERR("Error returned in polling fd %d.", pollfd[i].fd); | |
2894 | if (!local_stream[i]->data_read) { | |
43c34bc3 | 2895 | consumer_del_stream(local_stream[i], data_ht); |
9617607b | 2896 | local_stream[i] = NULL; |
4078b776 MD |
2897 | num_hup++; |
2898 | } | |
2899 | } else if (pollfd[i].revents & POLLNVAL) { | |
2900 | ERR("Polling fd %d tells fd is not open.", pollfd[i].fd); | |
2901 | if (!local_stream[i]->data_read) { | |
43c34bc3 | 2902 | consumer_del_stream(local_stream[i], data_ht); |
9617607b | 2903 | local_stream[i] = NULL; |
4078b776 | 2904 | num_hup++; |
3bd1e081 MD |
2905 | } |
2906 | } | |
9617607b DG |
2907 | if (local_stream[i] != NULL) { |
2908 | local_stream[i]->data_read = 0; | |
2909 | } | |
3bd1e081 MD |
2910 | } |
2911 | } | |
1fc79fb4 MD |
2912 | /* All is OK */ |
2913 | err = 0; | |
3bd1e081 MD |
2914 | end: |
2915 | DBG("polling thread exiting"); | |
0e428499 DG |
2916 | free(pollfd); |
2917 | free(local_stream); | |
fb3a43a9 DG |
2918 | |
2919 | /* | |
2920 | * Close the write side of the pipe so epoll_wait() in | |
7d980def DG |
2921 | * consumer_thread_metadata_poll can catch it. The thread is monitoring the |
2922 | * read side of the pipe. If we close them both, epoll_wait strangely does | |
2923 | * not return and could create a endless wait period if the pipe is the | |
2924 | * only tracked fd in the poll set. The thread will take care of closing | |
2925 | * the read side. | |
fb3a43a9 | 2926 | */ |
13886d2d | 2927 | (void) lttng_pipe_write_close(ctx->consumer_metadata_pipe); |
fb3a43a9 | 2928 | |
2d57de81 | 2929 | error_testpoint: |
1fc79fb4 MD |
2930 | if (err) { |
2931 | health_error(); | |
2932 | ERR("Health error occurred in %s", __func__); | |
2933 | } | |
2934 | health_unregister(health_consumerd); | |
2935 | ||
e7b994a3 | 2936 | rcu_unregister_thread(); |
3bd1e081 MD |
2937 | return NULL; |
2938 | } | |
2939 | ||
d8ef542d MD |
2940 | /* |
2941 | * Close wake-up end of each stream belonging to the channel. This will | |
2942 | * allow the poll() on the stream read-side to detect when the | |
2943 | * write-side (application) finally closes them. | |
2944 | */ | |
2945 | static | |
2946 | void consumer_close_channel_streams(struct lttng_consumer_channel *channel) | |
2947 | { | |
2948 | struct lttng_ht *ht; | |
2949 | struct lttng_consumer_stream *stream; | |
2950 | struct lttng_ht_iter iter; | |
2951 | ||
2952 | ht = consumer_data.stream_per_chan_id_ht; | |
2953 | ||
2954 | rcu_read_lock(); | |
2955 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
2956 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
2957 | ht->match_fct, &channel->key, | |
2958 | &iter.iter, stream, node_channel_id.node) { | |
f2ad556d MD |
2959 | /* |
2960 | * Protect against teardown with mutex. | |
2961 | */ | |
2962 | pthread_mutex_lock(&stream->lock); | |
2963 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
2964 | goto next; | |
2965 | } | |
d8ef542d MD |
2966 | switch (consumer_data.type) { |
2967 | case LTTNG_CONSUMER_KERNEL: | |
2968 | break; | |
2969 | case LTTNG_CONSUMER32_UST: | |
2970 | case LTTNG_CONSUMER64_UST: | |
b4a650f3 DG |
2971 | if (stream->metadata_flag) { |
2972 | /* Safe and protected by the stream lock. */ | |
2973 | lttng_ustconsumer_close_metadata(stream->chan); | |
2974 | } else { | |
2975 | /* | |
2976 | * Note: a mutex is taken internally within | |
2977 | * liblttng-ust-ctl to protect timer wakeup_fd | |
2978 | * use from concurrent close. | |
2979 | */ | |
2980 | lttng_ustconsumer_close_stream_wakeup(stream); | |
2981 | } | |
d8ef542d MD |
2982 | break; |
2983 | default: | |
2984 | ERR("Unknown consumer_data type"); | |
2985 | assert(0); | |
2986 | } | |
f2ad556d MD |
2987 | next: |
2988 | pthread_mutex_unlock(&stream->lock); | |
d8ef542d MD |
2989 | } |
2990 | rcu_read_unlock(); | |
2991 | } | |
2992 | ||
2993 | static void destroy_channel_ht(struct lttng_ht *ht) | |
2994 | { | |
2995 | struct lttng_ht_iter iter; | |
2996 | struct lttng_consumer_channel *channel; | |
2997 | int ret; | |
2998 | ||
2999 | if (ht == NULL) { | |
3000 | return; | |
3001 | } | |
3002 | ||
3003 | rcu_read_lock(); | |
3004 | cds_lfht_for_each_entry(ht->ht, &iter.iter, channel, wait_fd_node.node) { | |
3005 | ret = lttng_ht_del(ht, &iter); | |
3006 | assert(ret != 0); | |
3007 | } | |
3008 | rcu_read_unlock(); | |
3009 | ||
3010 | lttng_ht_destroy(ht); | |
3011 | } | |
3012 | ||
3013 | /* | |
3014 | * This thread polls the channel fds to detect when they are being | |
3015 | * closed. It closes all related streams if the channel is detected as | |
3016 | * closed. It is currently only used as a shim layer for UST because the | |
3017 | * consumerd needs to keep the per-stream wakeup end of pipes open for | |
3018 | * periodical flush. | |
3019 | */ | |
3020 | void *consumer_thread_channel_poll(void *data) | |
3021 | { | |
1fc79fb4 | 3022 | int ret, i, pollfd, err = -1; |
d8ef542d MD |
3023 | uint32_t revents, nb_fd; |
3024 | struct lttng_consumer_channel *chan = NULL; | |
3025 | struct lttng_ht_iter iter; | |
3026 | struct lttng_ht_node_u64 *node; | |
3027 | struct lttng_poll_event events; | |
3028 | struct lttng_consumer_local_data *ctx = data; | |
3029 | struct lttng_ht *channel_ht; | |
3030 | ||
3031 | rcu_register_thread(); | |
3032 | ||
1fc79fb4 MD |
3033 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_CHANNEL); |
3034 | ||
2d57de81 MD |
3035 | if (testpoint(consumerd_thread_channel)) { |
3036 | goto error_testpoint; | |
3037 | } | |
3038 | ||
9ce5646a MD |
3039 | health_code_update(); |
3040 | ||
d8ef542d MD |
3041 | channel_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3042 | if (!channel_ht) { | |
3043 | /* ENOMEM at this point. Better to bail out. */ | |
3044 | goto end_ht; | |
3045 | } | |
3046 | ||
3047 | DBG("Thread channel poll started"); | |
3048 | ||
3049 | /* Size is set to 1 for the consumer_channel pipe */ | |
3050 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
3051 | if (ret < 0) { | |
3052 | ERR("Poll set creation failed"); | |
3053 | goto end_poll; | |
3054 | } | |
3055 | ||
3056 | ret = lttng_poll_add(&events, ctx->consumer_channel_pipe[0], LPOLLIN); | |
3057 | if (ret < 0) { | |
3058 | goto end; | |
3059 | } | |
3060 | ||
3061 | /* Main loop */ | |
3062 | DBG("Channel main loop started"); | |
3063 | ||
3064 | while (1) { | |
d8ef542d | 3065 | restart: |
7fa2082e MD |
3066 | health_code_update(); |
3067 | DBG("Channel poll wait"); | |
9ce5646a | 3068 | health_poll_entry(); |
d8ef542d | 3069 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
3070 | DBG("Channel poll return from wait with %d fd(s)", |
3071 | LTTNG_POLL_GETNB(&events)); | |
9ce5646a | 3072 | health_poll_exit(); |
40063ead | 3073 | DBG("Channel event caught in thread"); |
d8ef542d MD |
3074 | if (ret < 0) { |
3075 | if (errno == EINTR) { | |
40063ead | 3076 | ERR("Poll EINTR caught"); |
d8ef542d MD |
3077 | goto restart; |
3078 | } | |
d9607cd7 MD |
3079 | if (LTTNG_POLL_GETNB(&events) == 0) { |
3080 | err = 0; /* All is OK */ | |
3081 | } | |
d8ef542d MD |
3082 | goto end; |
3083 | } | |
3084 | ||
3085 | nb_fd = ret; | |
3086 | ||
3087 | /* From here, the event is a channel wait fd */ | |
3088 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
3089 | health_code_update(); |
3090 | ||
d8ef542d MD |
3091 | revents = LTTNG_POLL_GETEV(&events, i); |
3092 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3093 | ||
d8ef542d | 3094 | if (pollfd == ctx->consumer_channel_pipe[0]) { |
03e43155 | 3095 | if (revents & LPOLLIN) { |
d8ef542d | 3096 | enum consumer_channel_action action; |
a0cbdd2e | 3097 | uint64_t key; |
d8ef542d | 3098 | |
a0cbdd2e | 3099 | ret = read_channel_pipe(ctx, &chan, &key, &action); |
d8ef542d | 3100 | if (ret <= 0) { |
03e43155 MD |
3101 | if (ret < 0) { |
3102 | ERR("Error reading channel pipe"); | |
3103 | } | |
3104 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
d8ef542d MD |
3105 | continue; |
3106 | } | |
3107 | ||
3108 | switch (action) { | |
3109 | case CONSUMER_CHANNEL_ADD: | |
3110 | DBG("Adding channel %d to poll set", | |
3111 | chan->wait_fd); | |
3112 | ||
3113 | lttng_ht_node_init_u64(&chan->wait_fd_node, | |
3114 | chan->wait_fd); | |
c7260a81 | 3115 | rcu_read_lock(); |
d8ef542d MD |
3116 | lttng_ht_add_unique_u64(channel_ht, |
3117 | &chan->wait_fd_node); | |
c7260a81 | 3118 | rcu_read_unlock(); |
d8ef542d MD |
3119 | /* Add channel to the global poll events list */ |
3120 | lttng_poll_add(&events, chan->wait_fd, | |
03e43155 | 3121 | LPOLLERR | LPOLLHUP); |
d8ef542d | 3122 | break; |
a0cbdd2e MD |
3123 | case CONSUMER_CHANNEL_DEL: |
3124 | { | |
b4a650f3 DG |
3125 | /* |
3126 | * This command should never be called if the channel | |
3127 | * has streams monitored by either the data or metadata | |
3128 | * thread. The consumer only notify this thread with a | |
3129 | * channel del. command if it receives a destroy | |
3130 | * channel command from the session daemon that send it | |
3131 | * if a command prior to the GET_CHANNEL failed. | |
3132 | */ | |
3133 | ||
c7260a81 | 3134 | rcu_read_lock(); |
a0cbdd2e MD |
3135 | chan = consumer_find_channel(key); |
3136 | if (!chan) { | |
c7260a81 | 3137 | rcu_read_unlock(); |
a0cbdd2e MD |
3138 | ERR("UST consumer get channel key %" PRIu64 " not found for del channel", key); |
3139 | break; | |
3140 | } | |
3141 | lttng_poll_del(&events, chan->wait_fd); | |
f623cc0b | 3142 | iter.iter.node = &chan->wait_fd_node.node; |
a0cbdd2e MD |
3143 | ret = lttng_ht_del(channel_ht, &iter); |
3144 | assert(ret == 0); | |
a0cbdd2e | 3145 | |
f2a444f1 DG |
3146 | switch (consumer_data.type) { |
3147 | case LTTNG_CONSUMER_KERNEL: | |
3148 | break; | |
3149 | case LTTNG_CONSUMER32_UST: | |
3150 | case LTTNG_CONSUMER64_UST: | |
212d67a2 DG |
3151 | health_code_update(); |
3152 | /* Destroy streams that might have been left in the stream list. */ | |
3153 | clean_channel_stream_list(chan); | |
f2a444f1 DG |
3154 | break; |
3155 | default: | |
3156 | ERR("Unknown consumer_data type"); | |
3157 | assert(0); | |
3158 | } | |
3159 | ||
a0cbdd2e MD |
3160 | /* |
3161 | * Release our own refcount. Force channel deletion even if | |
3162 | * streams were not initialized. | |
3163 | */ | |
3164 | if (!uatomic_sub_return(&chan->refcount, 1)) { | |
3165 | consumer_del_channel(chan); | |
3166 | } | |
c7260a81 | 3167 | rcu_read_unlock(); |
a0cbdd2e MD |
3168 | goto restart; |
3169 | } | |
d8ef542d MD |
3170 | case CONSUMER_CHANNEL_QUIT: |
3171 | /* | |
3172 | * Remove the pipe from the poll set and continue the loop | |
3173 | * since their might be data to consume. | |
3174 | */ | |
3175 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
3176 | continue; | |
3177 | default: | |
3178 | ERR("Unknown action"); | |
3179 | break; | |
3180 | } | |
03e43155 MD |
3181 | } else if (revents & (LPOLLERR | LPOLLHUP)) { |
3182 | DBG("Channel thread pipe hung up"); | |
3183 | /* | |
3184 | * Remove the pipe from the poll set and continue the loop | |
3185 | * since their might be data to consume. | |
3186 | */ | |
3187 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
3188 | continue; | |
3189 | } else { | |
3190 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3191 | goto end; | |
d8ef542d MD |
3192 | } |
3193 | ||
3194 | /* Handle other stream */ | |
3195 | continue; | |
3196 | } | |
3197 | ||
3198 | rcu_read_lock(); | |
3199 | { | |
3200 | uint64_t tmp_id = (uint64_t) pollfd; | |
3201 | ||
3202 | lttng_ht_lookup(channel_ht, &tmp_id, &iter); | |
3203 | } | |
3204 | node = lttng_ht_iter_get_node_u64(&iter); | |
3205 | assert(node); | |
3206 | ||
3207 | chan = caa_container_of(node, struct lttng_consumer_channel, | |
3208 | wait_fd_node); | |
3209 | ||
3210 | /* Check for error event */ | |
3211 | if (revents & (LPOLLERR | LPOLLHUP)) { | |
3212 | DBG("Channel fd %d is hup|err.", pollfd); | |
3213 | ||
3214 | lttng_poll_del(&events, chan->wait_fd); | |
3215 | ret = lttng_ht_del(channel_ht, &iter); | |
3216 | assert(ret == 0); | |
b4a650f3 DG |
3217 | |
3218 | /* | |
3219 | * This will close the wait fd for each stream associated to | |
3220 | * this channel AND monitored by the data/metadata thread thus | |
3221 | * will be clean by the right thread. | |
3222 | */ | |
d8ef542d | 3223 | consumer_close_channel_streams(chan); |
f2ad556d MD |
3224 | |
3225 | /* Release our own refcount */ | |
3226 | if (!uatomic_sub_return(&chan->refcount, 1) | |
3227 | && !uatomic_read(&chan->nb_init_stream_left)) { | |
3228 | consumer_del_channel(chan); | |
3229 | } | |
03e43155 MD |
3230 | } else { |
3231 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3232 | rcu_read_unlock(); | |
3233 | goto end; | |
d8ef542d MD |
3234 | } |
3235 | ||
3236 | /* Release RCU lock for the channel looked up */ | |
3237 | rcu_read_unlock(); | |
3238 | } | |
3239 | } | |
3240 | ||
1fc79fb4 MD |
3241 | /* All is OK */ |
3242 | err = 0; | |
d8ef542d MD |
3243 | end: |
3244 | lttng_poll_clean(&events); | |
3245 | end_poll: | |
3246 | destroy_channel_ht(channel_ht); | |
3247 | end_ht: | |
2d57de81 | 3248 | error_testpoint: |
d8ef542d | 3249 | DBG("Channel poll thread exiting"); |
1fc79fb4 MD |
3250 | if (err) { |
3251 | health_error(); | |
3252 | ERR("Health error occurred in %s", __func__); | |
3253 | } | |
3254 | health_unregister(health_consumerd); | |
d8ef542d MD |
3255 | rcu_unregister_thread(); |
3256 | return NULL; | |
3257 | } | |
3258 | ||
331744e3 JD |
3259 | static int set_metadata_socket(struct lttng_consumer_local_data *ctx, |
3260 | struct pollfd *sockpoll, int client_socket) | |
3261 | { | |
3262 | int ret; | |
3263 | ||
3264 | assert(ctx); | |
3265 | assert(sockpoll); | |
3266 | ||
84382d49 MD |
3267 | ret = lttng_consumer_poll_socket(sockpoll); |
3268 | if (ret) { | |
331744e3 JD |
3269 | goto error; |
3270 | } | |
3271 | DBG("Metadata connection on client_socket"); | |
3272 | ||
3273 | /* Blocking call, waiting for transmission */ | |
3274 | ctx->consumer_metadata_socket = lttcomm_accept_unix_sock(client_socket); | |
3275 | if (ctx->consumer_metadata_socket < 0) { | |
3276 | WARN("On accept metadata"); | |
3277 | ret = -1; | |
3278 | goto error; | |
3279 | } | |
3280 | ret = 0; | |
3281 | ||
3282 | error: | |
3283 | return ret; | |
3284 | } | |
3285 | ||
3bd1e081 MD |
3286 | /* |
3287 | * This thread listens on the consumerd socket and receives the file | |
3288 | * descriptors from the session daemon. | |
3289 | */ | |
7d980def | 3290 | void *consumer_thread_sessiond_poll(void *data) |
3bd1e081 | 3291 | { |
1fc79fb4 | 3292 | int sock = -1, client_socket, ret, err = -1; |
3bd1e081 MD |
3293 | /* |
3294 | * structure to poll for incoming data on communication socket avoids | |
3295 | * making blocking sockets. | |
3296 | */ | |
3297 | struct pollfd consumer_sockpoll[2]; | |
3298 | struct lttng_consumer_local_data *ctx = data; | |
3299 | ||
e7b994a3 DG |
3300 | rcu_register_thread(); |
3301 | ||
1fc79fb4 MD |
3302 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_SESSIOND); |
3303 | ||
2d57de81 MD |
3304 | if (testpoint(consumerd_thread_sessiond)) { |
3305 | goto error_testpoint; | |
3306 | } | |
3307 | ||
9ce5646a MD |
3308 | health_code_update(); |
3309 | ||
3bd1e081 MD |
3310 | DBG("Creating command socket %s", ctx->consumer_command_sock_path); |
3311 | unlink(ctx->consumer_command_sock_path); | |
3312 | client_socket = lttcomm_create_unix_sock(ctx->consumer_command_sock_path); | |
3313 | if (client_socket < 0) { | |
3314 | ERR("Cannot create command socket"); | |
3315 | goto end; | |
3316 | } | |
3317 | ||
3318 | ret = lttcomm_listen_unix_sock(client_socket); | |
3319 | if (ret < 0) { | |
3320 | goto end; | |
3321 | } | |
3322 | ||
32258573 | 3323 | DBG("Sending ready command to lttng-sessiond"); |
f73fabfd | 3324 | ret = lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_COMMAND_SOCK_READY); |
3bd1e081 MD |
3325 | /* return < 0 on error, but == 0 is not fatal */ |
3326 | if (ret < 0) { | |
32258573 | 3327 | ERR("Error sending ready command to lttng-sessiond"); |
3bd1e081 MD |
3328 | goto end; |
3329 | } | |
3330 | ||
3bd1e081 MD |
3331 | /* prepare the FDs to poll : to client socket and the should_quit pipe */ |
3332 | consumer_sockpoll[0].fd = ctx->consumer_should_quit[0]; | |
3333 | consumer_sockpoll[0].events = POLLIN | POLLPRI; | |
3334 | consumer_sockpoll[1].fd = client_socket; | |
3335 | consumer_sockpoll[1].events = POLLIN | POLLPRI; | |
3336 | ||
84382d49 MD |
3337 | ret = lttng_consumer_poll_socket(consumer_sockpoll); |
3338 | if (ret) { | |
3339 | if (ret > 0) { | |
3340 | /* should exit */ | |
3341 | err = 0; | |
3342 | } | |
3bd1e081 MD |
3343 | goto end; |
3344 | } | |
3345 | DBG("Connection on client_socket"); | |
3346 | ||
3347 | /* Blocking call, waiting for transmission */ | |
3348 | sock = lttcomm_accept_unix_sock(client_socket); | |
534d2592 | 3349 | if (sock < 0) { |
3bd1e081 MD |
3350 | WARN("On accept"); |
3351 | goto end; | |
3352 | } | |
3bd1e081 | 3353 | |
331744e3 JD |
3354 | /* |
3355 | * Setup metadata socket which is the second socket connection on the | |
3356 | * command unix socket. | |
3357 | */ | |
3358 | ret = set_metadata_socket(ctx, consumer_sockpoll, client_socket); | |
84382d49 MD |
3359 | if (ret) { |
3360 | if (ret > 0) { | |
3361 | /* should exit */ | |
3362 | err = 0; | |
3363 | } | |
331744e3 JD |
3364 | goto end; |
3365 | } | |
3366 | ||
d96f09c6 DG |
3367 | /* This socket is not useful anymore. */ |
3368 | ret = close(client_socket); | |
3369 | if (ret < 0) { | |
3370 | PERROR("close client_socket"); | |
3371 | } | |
3372 | client_socket = -1; | |
3373 | ||
3bd1e081 MD |
3374 | /* update the polling structure to poll on the established socket */ |
3375 | consumer_sockpoll[1].fd = sock; | |
3376 | consumer_sockpoll[1].events = POLLIN | POLLPRI; | |
3377 | ||
3378 | while (1) { | |
9ce5646a MD |
3379 | health_code_update(); |
3380 | ||
3381 | health_poll_entry(); | |
3382 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
3383 | health_poll_exit(); | |
84382d49 MD |
3384 | if (ret) { |
3385 | if (ret > 0) { | |
3386 | /* should exit */ | |
3387 | err = 0; | |
3388 | } | |
3bd1e081 MD |
3389 | goto end; |
3390 | } | |
3391 | DBG("Incoming command on sock"); | |
3392 | ret = lttng_consumer_recv_cmd(ctx, sock, consumer_sockpoll); | |
4cbc1a04 DG |
3393 | if (ret <= 0) { |
3394 | /* | |
3395 | * This could simply be a session daemon quitting. Don't output | |
3396 | * ERR() here. | |
3397 | */ | |
3398 | DBG("Communication interrupted on command socket"); | |
41ba6035 | 3399 | err = 0; |
3bd1e081 MD |
3400 | goto end; |
3401 | } | |
10211f5c | 3402 | if (CMM_LOAD_SHARED(consumer_quit)) { |
3bd1e081 | 3403 | DBG("consumer_thread_receive_fds received quit from signal"); |
1fc79fb4 | 3404 | err = 0; /* All is OK */ |
3bd1e081 MD |
3405 | goto end; |
3406 | } | |
ffe60014 | 3407 | DBG("received command on sock"); |
3bd1e081 | 3408 | } |
1fc79fb4 MD |
3409 | /* All is OK */ |
3410 | err = 0; | |
3411 | ||
3bd1e081 | 3412 | end: |
ffe60014 | 3413 | DBG("Consumer thread sessiond poll exiting"); |
3bd1e081 | 3414 | |
d88aee68 DG |
3415 | /* |
3416 | * Close metadata streams since the producer is the session daemon which | |
3417 | * just died. | |
3418 | * | |
3419 | * NOTE: for now, this only applies to the UST tracer. | |
3420 | */ | |
6d574024 | 3421 | lttng_consumer_close_all_metadata(); |
d88aee68 | 3422 | |
3bd1e081 MD |
3423 | /* |
3424 | * when all fds have hung up, the polling thread | |
3425 | * can exit cleanly | |
3426 | */ | |
10211f5c | 3427 | CMM_STORE_SHARED(consumer_quit, 1); |
3bd1e081 | 3428 | |
04fdd819 | 3429 | /* |
c869f647 | 3430 | * Notify the data poll thread to poll back again and test the |
8994307f | 3431 | * consumer_quit state that we just set so to quit gracefully. |
04fdd819 | 3432 | */ |
acdb9057 | 3433 | notify_thread_lttng_pipe(ctx->consumer_data_pipe); |
c869f647 | 3434 | |
a0cbdd2e | 3435 | notify_channel_pipe(ctx, NULL, -1, CONSUMER_CHANNEL_QUIT); |
d8ef542d | 3436 | |
5c635c72 MD |
3437 | notify_health_quit_pipe(health_quit_pipe); |
3438 | ||
d96f09c6 DG |
3439 | /* Cleaning up possibly open sockets. */ |
3440 | if (sock >= 0) { | |
3441 | ret = close(sock); | |
3442 | if (ret < 0) { | |
3443 | PERROR("close sock sessiond poll"); | |
3444 | } | |
3445 | } | |
3446 | if (client_socket >= 0) { | |
38476d24 | 3447 | ret = close(client_socket); |
d96f09c6 DG |
3448 | if (ret < 0) { |
3449 | PERROR("close client_socket sessiond poll"); | |
3450 | } | |
3451 | } | |
3452 | ||
2d57de81 | 3453 | error_testpoint: |
1fc79fb4 MD |
3454 | if (err) { |
3455 | health_error(); | |
3456 | ERR("Health error occurred in %s", __func__); | |
3457 | } | |
3458 | health_unregister(health_consumerd); | |
3459 | ||
e7b994a3 | 3460 | rcu_unregister_thread(); |
3bd1e081 MD |
3461 | return NULL; |
3462 | } | |
d41f73b7 | 3463 | |
4078b776 | 3464 | ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
3465 | struct lttng_consumer_local_data *ctx) |
3466 | { | |
74251bb8 DG |
3467 | ssize_t ret; |
3468 | ||
d2956687 | 3469 | pthread_mutex_lock(&stream->chan->lock); |
74251bb8 | 3470 | pthread_mutex_lock(&stream->lock); |
94d49140 JD |
3471 | if (stream->metadata_flag) { |
3472 | pthread_mutex_lock(&stream->metadata_rdv_lock); | |
3473 | } | |
74251bb8 | 3474 | |
d41f73b7 MD |
3475 | switch (consumer_data.type) { |
3476 | case LTTNG_CONSUMER_KERNEL: | |
d2956687 | 3477 | ret = lttng_kconsumer_read_subbuffer(stream, ctx); |
74251bb8 | 3478 | break; |
7753dea8 MD |
3479 | case LTTNG_CONSUMER32_UST: |
3480 | case LTTNG_CONSUMER64_UST: | |
d2956687 | 3481 | ret = lttng_ustconsumer_read_subbuffer(stream, ctx); |
74251bb8 | 3482 | break; |
d41f73b7 MD |
3483 | default: |
3484 | ERR("Unknown consumer_data type"); | |
3485 | assert(0); | |
74251bb8 DG |
3486 | ret = -ENOSYS; |
3487 | break; | |
d41f73b7 | 3488 | } |
74251bb8 | 3489 | |
94d49140 JD |
3490 | if (stream->metadata_flag) { |
3491 | pthread_cond_broadcast(&stream->metadata_rdv); | |
3492 | pthread_mutex_unlock(&stream->metadata_rdv_lock); | |
3493 | } | |
74251bb8 | 3494 | pthread_mutex_unlock(&stream->lock); |
d2956687 | 3495 | pthread_mutex_unlock(&stream->chan->lock); |
02d02e31 | 3496 | |
74251bb8 | 3497 | return ret; |
d41f73b7 MD |
3498 | } |
3499 | ||
3500 | int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
3501 | { | |
3502 | switch (consumer_data.type) { | |
3503 | case LTTNG_CONSUMER_KERNEL: | |
3504 | return lttng_kconsumer_on_recv_stream(stream); | |
7753dea8 MD |
3505 | case LTTNG_CONSUMER32_UST: |
3506 | case LTTNG_CONSUMER64_UST: | |
d41f73b7 MD |
3507 | return lttng_ustconsumer_on_recv_stream(stream); |
3508 | default: | |
3509 | ERR("Unknown consumer_data type"); | |
3510 | assert(0); | |
3511 | return -ENOSYS; | |
3512 | } | |
3513 | } | |
e4421fec DG |
3514 | |
3515 | /* | |
3516 | * Allocate and set consumer data hash tables. | |
3517 | */ | |
282dadbc | 3518 | int lttng_consumer_init(void) |
e4421fec | 3519 | { |
d88aee68 | 3520 | consumer_data.channel_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3521 | if (!consumer_data.channel_ht) { |
3522 | goto error; | |
3523 | } | |
3524 | ||
5c3892a6 JG |
3525 | consumer_data.channels_by_session_id_ht = |
3526 | lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3527 | if (!consumer_data.channels_by_session_id_ht) { | |
3528 | goto error; | |
3529 | } | |
3530 | ||
d88aee68 | 3531 | consumer_data.relayd_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3532 | if (!consumer_data.relayd_ht) { |
3533 | goto error; | |
3534 | } | |
3535 | ||
d88aee68 | 3536 | consumer_data.stream_list_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3537 | if (!consumer_data.stream_list_ht) { |
3538 | goto error; | |
3539 | } | |
3540 | ||
d8ef542d | 3541 | consumer_data.stream_per_chan_id_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3542 | if (!consumer_data.stream_per_chan_id_ht) { |
3543 | goto error; | |
3544 | } | |
3545 | ||
3546 | data_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3547 | if (!data_ht) { | |
3548 | goto error; | |
3549 | } | |
3550 | ||
3551 | metadata_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3552 | if (!metadata_ht) { | |
3553 | goto error; | |
3554 | } | |
3555 | ||
28cc88f3 JG |
3556 | consumer_data.chunk_registry = lttng_trace_chunk_registry_create(); |
3557 | if (!consumer_data.chunk_registry) { | |
3558 | goto error; | |
3559 | } | |
3560 | ||
282dadbc MD |
3561 | return 0; |
3562 | ||
3563 | error: | |
3564 | return -1; | |
e4421fec | 3565 | } |
7735ef9e DG |
3566 | |
3567 | /* | |
3568 | * Process the ADD_RELAYD command receive by a consumer. | |
3569 | * | |
3570 | * This will create a relayd socket pair and add it to the relayd hash table. | |
3571 | * The caller MUST acquire a RCU read side lock before calling it. | |
3572 | */ | |
2527bf85 | 3573 | void consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, |
7735ef9e | 3574 | struct lttng_consumer_local_data *ctx, int sock, |
6151a90f | 3575 | struct pollfd *consumer_sockpoll, |
d3e2ba59 JD |
3576 | struct lttcomm_relayd_sock *relayd_sock, uint64_t sessiond_id, |
3577 | uint64_t relayd_session_id) | |
7735ef9e | 3578 | { |
cd2b09ed | 3579 | int fd = -1, ret = -1, relayd_created = 0; |
0c759fc9 | 3580 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
d4298c99 | 3581 | struct consumer_relayd_sock_pair *relayd = NULL; |
7735ef9e | 3582 | |
6151a90f JD |
3583 | assert(ctx); |
3584 | assert(relayd_sock); | |
3585 | ||
da009f2c | 3586 | DBG("Consumer adding relayd socket (idx: %" PRIu64 ")", net_seq_idx); |
7735ef9e DG |
3587 | |
3588 | /* Get relayd reference if exists. */ | |
3589 | relayd = consumer_find_relayd(net_seq_idx); | |
3590 | if (relayd == NULL) { | |
da009f2c | 3591 | assert(sock_type == LTTNG_STREAM_CONTROL); |
7735ef9e DG |
3592 | /* Not found. Allocate one. */ |
3593 | relayd = consumer_allocate_relayd_sock_pair(net_seq_idx); | |
3594 | if (relayd == NULL) { | |
618a6a28 MD |
3595 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
3596 | goto error; | |
0d08d75e | 3597 | } else { |
30319bcb | 3598 | relayd->sessiond_session_id = sessiond_id; |
0d08d75e | 3599 | relayd_created = 1; |
7735ef9e | 3600 | } |
0d08d75e DG |
3601 | |
3602 | /* | |
3603 | * This code path MUST continue to the consumer send status message to | |
3604 | * we can notify the session daemon and continue our work without | |
3605 | * killing everything. | |
3606 | */ | |
da009f2c MD |
3607 | } else { |
3608 | /* | |
3609 | * relayd key should never be found for control socket. | |
3610 | */ | |
3611 | assert(sock_type != LTTNG_STREAM_CONTROL); | |
0d08d75e DG |
3612 | } |
3613 | ||
3614 | /* First send a status message before receiving the fds. */ | |
0c759fc9 | 3615 | ret = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
618a6a28 | 3616 | if (ret < 0) { |
0d08d75e | 3617 | /* Somehow, the session daemon is not responding anymore. */ |
618a6a28 MD |
3618 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); |
3619 | goto error_nosignal; | |
7735ef9e DG |
3620 | } |
3621 | ||
3622 | /* Poll on consumer socket. */ | |
84382d49 MD |
3623 | ret = lttng_consumer_poll_socket(consumer_sockpoll); |
3624 | if (ret) { | |
3625 | /* Needing to exit in the middle of a command: error. */ | |
0d08d75e | 3626 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
618a6a28 | 3627 | goto error_nosignal; |
7735ef9e DG |
3628 | } |
3629 | ||
3630 | /* Get relayd socket from session daemon */ | |
3631 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); | |
3632 | if (ret != sizeof(fd)) { | |
4028eeb9 | 3633 | fd = -1; /* Just in case it gets set with an invalid value. */ |
0d08d75e DG |
3634 | |
3635 | /* | |
3636 | * Failing to receive FDs might indicate a major problem such as | |
3637 | * reaching a fd limit during the receive where the kernel returns a | |
3638 | * MSG_CTRUNC and fails to cleanup the fd in the queue. Any case, we | |
3639 | * don't take any chances and stop everything. | |
3640 | * | |
3641 | * XXX: Feature request #558 will fix that and avoid this possible | |
3642 | * issue when reaching the fd limit. | |
3643 | */ | |
3644 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); | |
618a6a28 | 3645 | ret_code = LTTCOMM_CONSUMERD_ERROR_RECV_FD; |
f50f23d9 DG |
3646 | goto error; |
3647 | } | |
3648 | ||
7735ef9e DG |
3649 | /* Copy socket information and received FD */ |
3650 | switch (sock_type) { | |
3651 | case LTTNG_STREAM_CONTROL: | |
3652 | /* Copy received lttcomm socket */ | |
6151a90f JD |
3653 | lttcomm_copy_sock(&relayd->control_sock.sock, &relayd_sock->sock); |
3654 | ret = lttcomm_create_sock(&relayd->control_sock.sock); | |
4028eeb9 | 3655 | /* Handle create_sock error. */ |
f66c074c | 3656 | if (ret < 0) { |
618a6a28 | 3657 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
4028eeb9 | 3658 | goto error; |
f66c074c | 3659 | } |
da009f2c MD |
3660 | /* |
3661 | * Close the socket created internally by | |
3662 | * lttcomm_create_sock, so we can replace it by the one | |
3663 | * received from sessiond. | |
3664 | */ | |
3665 | if (close(relayd->control_sock.sock.fd)) { | |
3666 | PERROR("close"); | |
3667 | } | |
7735ef9e DG |
3668 | |
3669 | /* Assign new file descriptor */ | |
6151a90f JD |
3670 | relayd->control_sock.sock.fd = fd; |
3671 | /* Assign version values. */ | |
3672 | relayd->control_sock.major = relayd_sock->major; | |
3673 | relayd->control_sock.minor = relayd_sock->minor; | |
c5b6f4f0 | 3674 | |
d3e2ba59 | 3675 | relayd->relayd_session_id = relayd_session_id; |
c5b6f4f0 | 3676 | |
7735ef9e DG |
3677 | break; |
3678 | case LTTNG_STREAM_DATA: | |
3679 | /* Copy received lttcomm socket */ | |
6151a90f JD |
3680 | lttcomm_copy_sock(&relayd->data_sock.sock, &relayd_sock->sock); |
3681 | ret = lttcomm_create_sock(&relayd->data_sock.sock); | |
4028eeb9 | 3682 | /* Handle create_sock error. */ |
f66c074c | 3683 | if (ret < 0) { |
618a6a28 | 3684 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
4028eeb9 | 3685 | goto error; |
f66c074c | 3686 | } |
da009f2c MD |
3687 | /* |
3688 | * Close the socket created internally by | |
3689 | * lttcomm_create_sock, so we can replace it by the one | |
3690 | * received from sessiond. | |
3691 | */ | |
3692 | if (close(relayd->data_sock.sock.fd)) { | |
3693 | PERROR("close"); | |
3694 | } | |
7735ef9e DG |
3695 | |
3696 | /* Assign new file descriptor */ | |
6151a90f JD |
3697 | relayd->data_sock.sock.fd = fd; |
3698 | /* Assign version values. */ | |
3699 | relayd->data_sock.major = relayd_sock->major; | |
3700 | relayd->data_sock.minor = relayd_sock->minor; | |
7735ef9e DG |
3701 | break; |
3702 | default: | |
3703 | ERR("Unknown relayd socket type (%d)", sock_type); | |
618a6a28 | 3704 | ret_code = LTTCOMM_CONSUMERD_FATAL; |
7735ef9e DG |
3705 | goto error; |
3706 | } | |
3707 | ||
d88aee68 | 3708 | DBG("Consumer %s socket created successfully with net idx %" PRIu64 " (fd: %d)", |
7735ef9e DG |
3709 | sock_type == LTTNG_STREAM_CONTROL ? "control" : "data", |
3710 | relayd->net_seq_idx, fd); | |
39d9954c FD |
3711 | /* |
3712 | * We gave the ownership of the fd to the relayd structure. Set the | |
3713 | * fd to -1 so we don't call close() on it in the error path below. | |
3714 | */ | |
3715 | fd = -1; | |
7735ef9e | 3716 | |
618a6a28 MD |
3717 | /* We successfully added the socket. Send status back. */ |
3718 | ret = consumer_send_status_msg(sock, ret_code); | |
3719 | if (ret < 0) { | |
3720 | /* Somehow, the session daemon is not responding anymore. */ | |
3721 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); | |
3722 | goto error_nosignal; | |
3723 | } | |
3724 | ||
7735ef9e DG |
3725 | /* |
3726 | * Add relayd socket pair to consumer data hashtable. If object already | |
3727 | * exists or on error, the function gracefully returns. | |
3728 | */ | |
9276e5c8 | 3729 | relayd->ctx = ctx; |
d09e1200 | 3730 | add_relayd(relayd); |
7735ef9e DG |
3731 | |
3732 | /* All good! */ | |
2527bf85 | 3733 | return; |
7735ef9e DG |
3734 | |
3735 | error: | |
618a6a28 MD |
3736 | if (consumer_send_status_msg(sock, ret_code) < 0) { |
3737 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); | |
3738 | } | |
3739 | ||
3740 | error_nosignal: | |
4028eeb9 DG |
3741 | /* Close received socket if valid. */ |
3742 | if (fd >= 0) { | |
3743 | if (close(fd)) { | |
3744 | PERROR("close received socket"); | |
3745 | } | |
3746 | } | |
cd2b09ed DG |
3747 | |
3748 | if (relayd_created) { | |
cd2b09ed DG |
3749 | free(relayd); |
3750 | } | |
7735ef9e | 3751 | } |
ca22feea | 3752 | |
f7079f67 DG |
3753 | /* |
3754 | * Search for a relayd associated to the session id and return the reference. | |
3755 | * | |
3756 | * A rcu read side lock MUST be acquire before calling this function and locked | |
3757 | * until the relayd object is no longer necessary. | |
3758 | */ | |
3759 | static struct consumer_relayd_sock_pair *find_relayd_by_session_id(uint64_t id) | |
3760 | { | |
3761 | struct lttng_ht_iter iter; | |
f7079f67 | 3762 | struct consumer_relayd_sock_pair *relayd = NULL; |
f7079f67 DG |
3763 | |
3764 | /* Iterate over all relayd since they are indexed by net_seq_idx. */ | |
3765 | cds_lfht_for_each_entry(consumer_data.relayd_ht->ht, &iter.iter, relayd, | |
3766 | node.node) { | |
18261bd1 DG |
3767 | /* |
3768 | * Check by sessiond id which is unique here where the relayd session | |
3769 | * id might not be when having multiple relayd. | |
3770 | */ | |
3771 | if (relayd->sessiond_session_id == id) { | |
f7079f67 | 3772 | /* Found the relayd. There can be only one per id. */ |
18261bd1 | 3773 | goto found; |
f7079f67 DG |
3774 | } |
3775 | } | |
3776 | ||
18261bd1 DG |
3777 | return NULL; |
3778 | ||
3779 | found: | |
f7079f67 DG |
3780 | return relayd; |
3781 | } | |
3782 | ||
ca22feea DG |
3783 | /* |
3784 | * Check if for a given session id there is still data needed to be extract | |
3785 | * from the buffers. | |
3786 | * | |
6d805429 | 3787 | * Return 1 if data is pending or else 0 meaning ready to be read. |
ca22feea | 3788 | */ |
6d805429 | 3789 | int consumer_data_pending(uint64_t id) |
ca22feea DG |
3790 | { |
3791 | int ret; | |
3792 | struct lttng_ht_iter iter; | |
3793 | struct lttng_ht *ht; | |
3794 | struct lttng_consumer_stream *stream; | |
f7079f67 | 3795 | struct consumer_relayd_sock_pair *relayd = NULL; |
6d805429 | 3796 | int (*data_pending)(struct lttng_consumer_stream *); |
ca22feea | 3797 | |
6d805429 | 3798 | DBG("Consumer data pending command on session id %" PRIu64, id); |
ca22feea | 3799 | |
6f6eda74 | 3800 | rcu_read_lock(); |
ca22feea DG |
3801 | pthread_mutex_lock(&consumer_data.lock); |
3802 | ||
3803 | switch (consumer_data.type) { | |
3804 | case LTTNG_CONSUMER_KERNEL: | |
6d805429 | 3805 | data_pending = lttng_kconsumer_data_pending; |
ca22feea DG |
3806 | break; |
3807 | case LTTNG_CONSUMER32_UST: | |
3808 | case LTTNG_CONSUMER64_UST: | |
6d805429 | 3809 | data_pending = lttng_ustconsumer_data_pending; |
ca22feea DG |
3810 | break; |
3811 | default: | |
3812 | ERR("Unknown consumer data type"); | |
3813 | assert(0); | |
3814 | } | |
3815 | ||
3816 | /* Ease our life a bit */ | |
3817 | ht = consumer_data.stream_list_ht; | |
3818 | ||
c8f59ee5 | 3819 | cds_lfht_for_each_entry_duplicate(ht->ht, |
d88aee68 DG |
3820 | ht->hash_fct(&id, lttng_ht_seed), |
3821 | ht->match_fct, &id, | |
ca22feea | 3822 | &iter.iter, stream, node_session_id.node) { |
bb586a6e | 3823 | pthread_mutex_lock(&stream->lock); |
ca22feea | 3824 | |
4e9a4686 DG |
3825 | /* |
3826 | * A removed node from the hash table indicates that the stream has | |
3827 | * been deleted thus having a guarantee that the buffers are closed | |
3828 | * on the consumer side. However, data can still be transmitted | |
3829 | * over the network so don't skip the relayd check. | |
3830 | */ | |
3831 | ret = cds_lfht_is_node_deleted(&stream->node.node); | |
3832 | if (!ret) { | |
3833 | /* Check the stream if there is data in the buffers. */ | |
6d805429 DG |
3834 | ret = data_pending(stream); |
3835 | if (ret == 1) { | |
4e9a4686 | 3836 | pthread_mutex_unlock(&stream->lock); |
f7079f67 | 3837 | goto data_pending; |
4e9a4686 DG |
3838 | } |
3839 | } | |
3840 | ||
d9f0c7c7 JR |
3841 | pthread_mutex_unlock(&stream->lock); |
3842 | } | |
3843 | ||
3844 | relayd = find_relayd_by_session_id(id); | |
3845 | if (relayd) { | |
3846 | unsigned int is_data_inflight = 0; | |
3847 | ||
3848 | /* Send init command for data pending. */ | |
3849 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
3850 | ret = relayd_begin_data_pending(&relayd->control_sock, | |
3851 | relayd->relayd_session_id); | |
3852 | if (ret < 0) { | |
3853 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
3854 | /* Communication error thus the relayd so no data pending. */ | |
3855 | goto data_not_pending; | |
3856 | } | |
3857 | ||
3858 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
3859 | ht->hash_fct(&id, lttng_ht_seed), | |
3860 | ht->match_fct, &id, | |
3861 | &iter.iter, stream, node_session_id.node) { | |
c8f59ee5 | 3862 | if (stream->metadata_flag) { |
ad7051c0 DG |
3863 | ret = relayd_quiescent_control(&relayd->control_sock, |
3864 | stream->relayd_stream_id); | |
c8f59ee5 | 3865 | } else { |
6d805429 | 3866 | ret = relayd_data_pending(&relayd->control_sock, |
39df6d9f DG |
3867 | stream->relayd_stream_id, |
3868 | stream->next_net_seq_num - 1); | |
c8f59ee5 | 3869 | } |
d9f0c7c7 JR |
3870 | |
3871 | if (ret == 1) { | |
3872 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
3873 | goto data_pending; | |
3874 | } else if (ret < 0) { | |
9276e5c8 JR |
3875 | ERR("Relayd data pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
3876 | lttng_consumer_cleanup_relayd(relayd); | |
3877 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
9276e5c8 JR |
3878 | goto data_not_pending; |
3879 | } | |
c8f59ee5 | 3880 | } |
f7079f67 | 3881 | |
d9f0c7c7 | 3882 | /* Send end command for data pending. */ |
f7079f67 DG |
3883 | ret = relayd_end_data_pending(&relayd->control_sock, |
3884 | relayd->relayd_session_id, &is_data_inflight); | |
3885 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
bdd88757 | 3886 | if (ret < 0) { |
9276e5c8 JR |
3887 | ERR("Relayd end data pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
3888 | lttng_consumer_cleanup_relayd(relayd); | |
f7079f67 DG |
3889 | goto data_not_pending; |
3890 | } | |
bdd88757 DG |
3891 | if (is_data_inflight) { |
3892 | goto data_pending; | |
3893 | } | |
f7079f67 DG |
3894 | } |
3895 | ||
ca22feea | 3896 | /* |
f7079f67 DG |
3897 | * Finding _no_ node in the hash table and no inflight data means that the |
3898 | * stream(s) have been removed thus data is guaranteed to be available for | |
3899 | * analysis from the trace files. | |
ca22feea DG |
3900 | */ |
3901 | ||
f7079f67 | 3902 | data_not_pending: |
ca22feea DG |
3903 | /* Data is available to be read by a viewer. */ |
3904 | pthread_mutex_unlock(&consumer_data.lock); | |
c8f59ee5 | 3905 | rcu_read_unlock(); |
6d805429 | 3906 | return 0; |
ca22feea | 3907 | |
f7079f67 | 3908 | data_pending: |
ca22feea DG |
3909 | /* Data is still being extracted from buffers. */ |
3910 | pthread_mutex_unlock(&consumer_data.lock); | |
c8f59ee5 | 3911 | rcu_read_unlock(); |
6d805429 | 3912 | return 1; |
ca22feea | 3913 | } |
f50f23d9 DG |
3914 | |
3915 | /* | |
3916 | * Send a ret code status message to the sessiond daemon. | |
3917 | * | |
3918 | * Return the sendmsg() return value. | |
3919 | */ | |
3920 | int consumer_send_status_msg(int sock, int ret_code) | |
3921 | { | |
3922 | struct lttcomm_consumer_status_msg msg; | |
3923 | ||
53efb85a | 3924 | memset(&msg, 0, sizeof(msg)); |
f50f23d9 DG |
3925 | msg.ret_code = ret_code; |
3926 | ||
3927 | return lttcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
3928 | } | |
ffe60014 DG |
3929 | |
3930 | /* | |
3931 | * Send a channel status message to the sessiond daemon. | |
3932 | * | |
3933 | * Return the sendmsg() return value. | |
3934 | */ | |
3935 | int consumer_send_status_channel(int sock, | |
3936 | struct lttng_consumer_channel *channel) | |
3937 | { | |
3938 | struct lttcomm_consumer_status_channel msg; | |
3939 | ||
3940 | assert(sock >= 0); | |
3941 | ||
53efb85a | 3942 | memset(&msg, 0, sizeof(msg)); |
ffe60014 | 3943 | if (!channel) { |
0c759fc9 | 3944 | msg.ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; |
ffe60014 | 3945 | } else { |
0c759fc9 | 3946 | msg.ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
ffe60014 DG |
3947 | msg.key = channel->key; |
3948 | msg.stream_count = channel->streams.count; | |
3949 | } | |
3950 | ||
3951 | return lttcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
3952 | } | |
5c786ded | 3953 | |
d07ceecd MD |
3954 | unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos, |
3955 | unsigned long produced_pos, uint64_t nb_packets_per_stream, | |
3956 | uint64_t max_sb_size) | |
5c786ded | 3957 | { |
d07ceecd | 3958 | unsigned long start_pos; |
5c786ded | 3959 | |
d07ceecd MD |
3960 | if (!nb_packets_per_stream) { |
3961 | return consumed_pos; /* Grab everything */ | |
3962 | } | |
3963 | start_pos = produced_pos - offset_align_floor(produced_pos, max_sb_size); | |
3964 | start_pos -= max_sb_size * nb_packets_per_stream; | |
3965 | if ((long) (start_pos - consumed_pos) < 0) { | |
3966 | return consumed_pos; /* Grab everything */ | |
3967 | } | |
3968 | return start_pos; | |
5c786ded | 3969 | } |
a1ae2ea5 | 3970 | |
b99a8d42 JD |
3971 | static |
3972 | int consumer_flush_buffer(struct lttng_consumer_stream *stream, int producer_active) | |
3973 | { | |
3974 | int ret = 0; | |
3975 | ||
3976 | switch (consumer_data.type) { | |
3977 | case LTTNG_CONSUMER_KERNEL: | |
3978 | ret = kernctl_buffer_flush(stream->wait_fd); | |
3979 | if (ret < 0) { | |
3980 | ERR("Failed to flush kernel stream"); | |
3981 | goto end; | |
3982 | } | |
3983 | break; | |
3984 | case LTTNG_CONSUMER32_UST: | |
3985 | case LTTNG_CONSUMER64_UST: | |
3986 | lttng_ustctl_flush_buffer(stream, producer_active); | |
3987 | break; | |
3988 | default: | |
3989 | ERR("Unknown consumer_data type"); | |
3990 | abort(); | |
3991 | } | |
3992 | ||
3993 | end: | |
3994 | return ret; | |
3995 | } | |
3996 | ||
3997 | /* | |
3998 | * Sample the rotate position for all the streams of a channel. If a stream | |
3999 | * is already at the rotate position (produced == consumed), we flag it as | |
4000 | * ready for rotation. The rotation of ready streams occurs after we have | |
4001 | * replied to the session daemon that we have finished sampling the positions. | |
92b7a7f8 | 4002 | * Must be called with RCU read-side lock held to ensure existence of channel. |
b99a8d42 JD |
4003 | * |
4004 | * Returns 0 on success, < 0 on error | |
4005 | */ | |
92b7a7f8 | 4006 | int lttng_consumer_rotate_channel(struct lttng_consumer_channel *channel, |
d2956687 | 4007 | uint64_t key, uint64_t relayd_id, uint32_t metadata, |
b99a8d42 JD |
4008 | struct lttng_consumer_local_data *ctx) |
4009 | { | |
4010 | int ret; | |
b99a8d42 JD |
4011 | struct lttng_consumer_stream *stream; |
4012 | struct lttng_ht_iter iter; | |
4013 | struct lttng_ht *ht = consumer_data.stream_per_chan_id_ht; | |
4014 | ||
4015 | DBG("Consumer sample rotate position for channel %" PRIu64, key); | |
4016 | ||
4017 | rcu_read_lock(); | |
4018 | ||
b99a8d42 | 4019 | pthread_mutex_lock(&channel->lock); |
b99a8d42 JD |
4020 | |
4021 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
4022 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
4023 | ht->match_fct, &channel->key, &iter.iter, | |
4024 | stream, node_channel_id.node) { | |
4025 | unsigned long consumed_pos; | |
4026 | ||
4027 | health_code_update(); | |
4028 | ||
4029 | /* | |
4030 | * Lock stream because we are about to change its state. | |
4031 | */ | |
4032 | pthread_mutex_lock(&stream->lock); | |
4033 | ||
b99a8d42 JD |
4034 | ret = lttng_consumer_sample_snapshot_positions(stream); |
4035 | if (ret < 0) { | |
4036 | ERR("Failed to sample snapshot position during channel rotation"); | |
4037 | goto end_unlock_stream; | |
4038 | } | |
4039 | ||
4040 | ret = lttng_consumer_get_produced_snapshot(stream, | |
4041 | &stream->rotate_position); | |
4042 | if (ret < 0) { | |
4043 | ERR("Failed to sample produced position during channel rotation"); | |
4044 | goto end_unlock_stream; | |
4045 | } | |
4046 | ||
4047 | lttng_consumer_get_consumed_snapshot(stream, | |
4048 | &consumed_pos); | |
4049 | if (consumed_pos == stream->rotate_position) { | |
4050 | stream->rotate_ready = true; | |
4051 | } | |
b99a8d42 JD |
4052 | |
4053 | ret = consumer_flush_buffer(stream, 1); | |
4054 | if (ret < 0) { | |
4055 | ERR("Failed to flush stream %" PRIu64 " during channel rotation", | |
4056 | stream->key); | |
4057 | goto end_unlock_stream; | |
4058 | } | |
4059 | ||
4060 | pthread_mutex_unlock(&stream->lock); | |
4061 | } | |
4062 | pthread_mutex_unlock(&channel->lock); | |
4063 | ||
4064 | ret = 0; | |
4065 | goto end; | |
4066 | ||
4067 | end_unlock_stream: | |
4068 | pthread_mutex_unlock(&stream->lock); | |
b99a8d42 JD |
4069 | pthread_mutex_unlock(&channel->lock); |
4070 | end: | |
4071 | rcu_read_unlock(); | |
4072 | return ret; | |
4073 | } | |
4074 | ||
02d02e31 JD |
4075 | /* |
4076 | * Check if a stream is ready to be rotated after extracting it. | |
4077 | * | |
4078 | * Return 1 if it is ready for rotation, 0 if it is not, a negative value on | |
4079 | * error. Stream lock must be held. | |
4080 | */ | |
4081 | int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream) | |
4082 | { | |
4083 | int ret; | |
4084 | unsigned long consumed_pos; | |
4085 | ||
4086 | if (!stream->rotate_position && !stream->rotate_ready) { | |
4087 | ret = 0; | |
4088 | goto end; | |
4089 | } | |
4090 | ||
4091 | if (stream->rotate_ready) { | |
4092 | ret = 1; | |
4093 | goto end; | |
4094 | } | |
4095 | ||
4096 | /* | |
4097 | * If we don't have the rotate_ready flag, check the consumed position | |
4098 | * to determine if we need to rotate. | |
4099 | */ | |
4100 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
4101 | if (ret < 0) { | |
4102 | ERR("Taking snapshot positions"); | |
4103 | goto end; | |
4104 | } | |
4105 | ||
4106 | ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos); | |
4107 | if (ret < 0) { | |
4108 | ERR("Consumed snapshot position"); | |
4109 | goto end; | |
4110 | } | |
4111 | ||
4112 | /* Rotate position not reached yet (with check for overflow). */ | |
4113 | if ((long) (consumed_pos - stream->rotate_position) < 0) { | |
4114 | ret = 0; | |
4115 | goto end; | |
4116 | } | |
4117 | ret = 1; | |
4118 | ||
4119 | end: | |
4120 | return ret; | |
4121 | } | |
4122 | ||
d73bf3d7 JD |
4123 | /* |
4124 | * Reset the state for a stream after a rotation occurred. | |
4125 | */ | |
4126 | void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream *stream) | |
4127 | { | |
4128 | stream->rotate_position = 0; | |
4129 | stream->rotate_ready = false; | |
4130 | } | |
4131 | ||
4132 | /* | |
4133 | * Perform the rotation a local stream file. | |
4134 | */ | |
d2956687 | 4135 | static |
d73bf3d7 JD |
4136 | int rotate_local_stream(struct lttng_consumer_local_data *ctx, |
4137 | struct lttng_consumer_stream *stream) | |
4138 | { | |
d2956687 | 4139 | int ret = 0; |
d73bf3d7 | 4140 | |
d2956687 | 4141 | DBG("Rotate local stream: stream key %" PRIu64 ", channel key %" PRIu64, |
d73bf3d7 | 4142 | stream->key, |
d2956687 | 4143 | stream->chan->key); |
d73bf3d7 | 4144 | stream->tracefile_size_current = 0; |
d2956687 | 4145 | stream->tracefile_count_current = 0; |
d73bf3d7 | 4146 | |
d2956687 JG |
4147 | if (stream->out_fd >= 0) { |
4148 | ret = close(stream->out_fd); | |
4149 | if (ret) { | |
4150 | PERROR("Failed to close stream out_fd of channel \"%s\"", | |
4151 | stream->chan->name); | |
4152 | } | |
4153 | stream->out_fd = -1; | |
4154 | } | |
d73bf3d7 | 4155 | |
d2956687 | 4156 | if (stream->index_file) { |
d73bf3d7 | 4157 | lttng_index_file_put(stream->index_file); |
d2956687 | 4158 | stream->index_file = NULL; |
d73bf3d7 JD |
4159 | } |
4160 | ||
d2956687 JG |
4161 | if (!stream->trace_chunk) { |
4162 | goto end; | |
4163 | } | |
d73bf3d7 | 4164 | |
d2956687 | 4165 | ret = consumer_stream_create_output_files(stream, true); |
d73bf3d7 JD |
4166 | end: |
4167 | return ret; | |
d73bf3d7 JD |
4168 | } |
4169 | ||
4170 | /* | |
4171 | * Perform the rotation a stream file on the relay. | |
4172 | */ | |
4173 | int rotate_relay_stream(struct lttng_consumer_local_data *ctx, | |
4174 | struct lttng_consumer_stream *stream) | |
4175 | { | |
4176 | int ret; | |
4177 | struct consumer_relayd_sock_pair *relayd; | |
d2956687 JG |
4178 | uint64_t chunk_id; |
4179 | enum lttng_trace_chunk_status chunk_status; | |
d73bf3d7 JD |
4180 | |
4181 | DBG("Rotate relay stream"); | |
4182 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
4183 | if (!relayd) { | |
4184 | ERR("Failed to find relayd"); | |
4185 | ret = -1; | |
4186 | goto end; | |
4187 | } | |
4188 | ||
d2956687 JG |
4189 | chunk_status = lttng_trace_chunk_get_id(stream->chan->trace_chunk, |
4190 | &chunk_id); | |
4191 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4192 | ERR("Failed to retrieve the id of the current trace chunk of channel \"%s\"", | |
4193 | stream->chan->name); | |
4194 | ret = -1; | |
4195 | goto end; | |
4196 | } | |
4197 | ||
d73bf3d7 JD |
4198 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); |
4199 | ret = relayd_rotate_stream(&relayd->control_sock, | |
4200 | stream->relayd_stream_id, | |
d2956687 | 4201 | chunk_id, |
d73bf3d7 JD |
4202 | stream->last_sequence_number); |
4203 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
45f1d9a1 JR |
4204 | if (ret < 0) { |
4205 | ERR("Relayd rotate stream failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); | |
4206 | lttng_consumer_cleanup_relayd(relayd); | |
4207 | } | |
d73bf3d7 JD |
4208 | if (ret) { |
4209 | ERR("Rotate relay stream"); | |
4210 | } | |
4211 | ||
4212 | end: | |
4213 | return ret; | |
4214 | } | |
4215 | ||
4216 | /* | |
4217 | * Performs the stream rotation for the rotate session feature if needed. | |
d2956687 | 4218 | * It must be called with the channel and stream locks held. |
d73bf3d7 JD |
4219 | * |
4220 | * Return 0 on success, a negative number of error. | |
4221 | */ | |
4222 | int lttng_consumer_rotate_stream(struct lttng_consumer_local_data *ctx, | |
d2956687 | 4223 | struct lttng_consumer_stream *stream) |
d73bf3d7 JD |
4224 | { |
4225 | int ret; | |
4226 | ||
4227 | DBG("Consumer rotate stream %" PRIu64, stream->key); | |
4228 | ||
d2956687 JG |
4229 | /* |
4230 | * Update the stream's 'current' chunk to the session's (channel) | |
4231 | * now-current chunk. | |
4232 | */ | |
4233 | lttng_trace_chunk_put(stream->trace_chunk); | |
4234 | if (stream->chan->trace_chunk == stream->trace_chunk) { | |
4235 | /* | |
4236 | * A channel can be rotated and not have a "next" chunk | |
4237 | * to transition to. In that case, the channel's "current chunk" | |
4238 | * has not been closed yet, but it has not been updated to | |
4239 | * a "next" trace chunk either. Hence, the stream, like its | |
4240 | * parent channel, becomes part of no chunk and can't output | |
4241 | * anything until a new trace chunk is created. | |
4242 | */ | |
4243 | stream->trace_chunk = NULL; | |
4244 | } else if (stream->chan->trace_chunk && | |
4245 | !lttng_trace_chunk_get(stream->chan->trace_chunk)) { | |
4246 | ERR("Failed to acquire a reference to channel's trace chunk during stream rotation"); | |
4247 | ret = -1; | |
4248 | goto error; | |
4249 | } else { | |
4250 | /* | |
4251 | * Update the stream's trace chunk to its parent channel's | |
4252 | * current trace chunk. | |
4253 | */ | |
4254 | stream->trace_chunk = stream->chan->trace_chunk; | |
4255 | } | |
4256 | ||
d73bf3d7 JD |
4257 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
4258 | ret = rotate_relay_stream(ctx, stream); | |
4259 | } else { | |
4260 | ret = rotate_local_stream(ctx, stream); | |
4261 | } | |
4262 | if (ret < 0) { | |
92816cc3 | 4263 | ERR("Failed to rotate stream, ret = %i", ret); |
d73bf3d7 JD |
4264 | goto error; |
4265 | } | |
4266 | ||
d2956687 JG |
4267 | if (stream->metadata_flag && stream->trace_chunk) { |
4268 | /* | |
4269 | * If the stream has transitioned to a new trace | |
4270 | * chunk, the metadata should be re-dumped to the | |
4271 | * newest chunk. | |
4272 | * | |
4273 | * However, it is possible for a stream to transition to | |
4274 | * a "no-chunk" state. This can happen if a rotation | |
4275 | * occurs on an inactive session. In such cases, the metadata | |
4276 | * regeneration will happen when the next trace chunk is | |
4277 | * created. | |
4278 | */ | |
4279 | ret = consumer_metadata_stream_dump(stream); | |
4280 | if (ret) { | |
4281 | goto error; | |
d73bf3d7 JD |
4282 | } |
4283 | } | |
4284 | lttng_consumer_reset_stream_rotate_state(stream); | |
4285 | ||
4286 | ret = 0; | |
4287 | ||
4288 | error: | |
4289 | return ret; | |
4290 | } | |
4291 | ||
b99a8d42 JD |
4292 | /* |
4293 | * Rotate all the ready streams now. | |
4294 | * | |
4295 | * This is especially important for low throughput streams that have already | |
4296 | * been consumed, we cannot wait for their next packet to perform the | |
4297 | * rotation. | |
92b7a7f8 MD |
4298 | * Need to be called with RCU read-side lock held to ensure existence of |
4299 | * channel. | |
b99a8d42 JD |
4300 | * |
4301 | * Returns 0 on success, < 0 on error | |
4302 | */ | |
92b7a7f8 MD |
4303 | int lttng_consumer_rotate_ready_streams(struct lttng_consumer_channel *channel, |
4304 | uint64_t key, struct lttng_consumer_local_data *ctx) | |
b99a8d42 JD |
4305 | { |
4306 | int ret; | |
b99a8d42 JD |
4307 | struct lttng_consumer_stream *stream; |
4308 | struct lttng_ht_iter iter; | |
4309 | struct lttng_ht *ht = consumer_data.stream_per_chan_id_ht; | |
4310 | ||
4311 | rcu_read_lock(); | |
4312 | ||
4313 | DBG("Consumer rotate ready streams in channel %" PRIu64, key); | |
4314 | ||
b99a8d42 JD |
4315 | cds_lfht_for_each_entry_duplicate(ht->ht, |
4316 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
4317 | ht->match_fct, &channel->key, &iter.iter, | |
4318 | stream, node_channel_id.node) { | |
4319 | health_code_update(); | |
4320 | ||
d2956687 | 4321 | pthread_mutex_lock(&stream->chan->lock); |
b99a8d42 JD |
4322 | pthread_mutex_lock(&stream->lock); |
4323 | ||
4324 | if (!stream->rotate_ready) { | |
4325 | pthread_mutex_unlock(&stream->lock); | |
d2956687 | 4326 | pthread_mutex_unlock(&stream->chan->lock); |
b99a8d42 JD |
4327 | continue; |
4328 | } | |
4329 | DBG("Consumer rotate ready stream %" PRIu64, stream->key); | |
4330 | ||
d2956687 | 4331 | ret = lttng_consumer_rotate_stream(ctx, stream); |
b99a8d42 | 4332 | pthread_mutex_unlock(&stream->lock); |
d2956687 | 4333 | pthread_mutex_unlock(&stream->chan->lock); |
b99a8d42 JD |
4334 | if (ret) { |
4335 | goto end; | |
4336 | } | |
4337 | } | |
4338 | ||
4339 | ret = 0; | |
4340 | ||
4341 | end: | |
4342 | rcu_read_unlock(); | |
4343 | return ret; | |
4344 | } | |
4345 | ||
d2956687 JG |
4346 | enum lttcomm_return_code lttng_consumer_init_command( |
4347 | struct lttng_consumer_local_data *ctx, | |
4348 | const lttng_uuid sessiond_uuid) | |
00fb02ac | 4349 | { |
d2956687 JG |
4350 | enum lttcomm_return_code ret; |
4351 | char uuid_str[UUID_STR_LEN]; | |
00fb02ac | 4352 | |
d2956687 JG |
4353 | if (ctx->sessiond_uuid.is_set) { |
4354 | ret = LTTCOMM_CONSUMERD_ALREADY_SET; | |
00fb02ac JD |
4355 | goto end; |
4356 | } | |
4357 | ||
d2956687 JG |
4358 | ctx->sessiond_uuid.is_set = true; |
4359 | memcpy(ctx->sessiond_uuid.value, sessiond_uuid, sizeof(lttng_uuid)); | |
4360 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
4361 | lttng_uuid_to_str(sessiond_uuid, uuid_str); | |
4362 | DBG("Received session daemon UUID: %s", uuid_str); | |
00fb02ac JD |
4363 | end: |
4364 | return ret; | |
4365 | } | |
4366 | ||
d2956687 JG |
4367 | enum lttcomm_return_code lttng_consumer_create_trace_chunk( |
4368 | const uint64_t *relayd_id, uint64_t session_id, | |
4369 | uint64_t chunk_id, | |
4370 | time_t chunk_creation_timestamp, | |
4371 | const char *chunk_override_name, | |
4372 | const struct lttng_credentials *credentials, | |
4373 | struct lttng_directory_handle *chunk_directory_handle) | |
00fb02ac JD |
4374 | { |
4375 | int ret; | |
d2956687 JG |
4376 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
4377 | struct lttng_trace_chunk *created_chunk, *published_chunk; | |
4378 | enum lttng_trace_chunk_status chunk_status; | |
4379 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4380 | char creation_timestamp_buffer[ISO8601_STR_LEN]; | |
4381 | const char *relayd_id_str = "(none)"; | |
4382 | const char *creation_timestamp_str; | |
4383 | struct lttng_ht_iter iter; | |
4384 | struct lttng_consumer_channel *channel; | |
92816cc3 | 4385 | |
d2956687 JG |
4386 | if (relayd_id) { |
4387 | /* Only used for logging purposes. */ | |
4388 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), | |
4389 | "%" PRIu64, *relayd_id); | |
4390 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { | |
4391 | relayd_id_str = relayd_id_buffer; | |
4392 | } else { | |
4393 | relayd_id_str = "(formatting error)"; | |
4394 | } | |
4395 | } | |
4396 | ||
4397 | /* Local protocol error. */ | |
4398 | assert(chunk_creation_timestamp); | |
4399 | ret = time_to_iso8601_str(chunk_creation_timestamp, | |
4400 | creation_timestamp_buffer, | |
4401 | sizeof(creation_timestamp_buffer)); | |
4402 | creation_timestamp_str = !ret ? creation_timestamp_buffer : | |
4403 | "(formatting error)"; | |
4404 | ||
4405 | DBG("Consumer create trace chunk command: relay_id = %s" | |
4406 | ", session_id = %" PRIu64 ", chunk_id = %" PRIu64 | |
4407 | ", chunk_override_name = %s" | |
4408 | ", chunk_creation_timestamp = %s", | |
4409 | relayd_id_str, session_id, chunk_id, | |
4410 | chunk_override_name ? : "(none)", | |
4411 | creation_timestamp_str); | |
92816cc3 JG |
4412 | |
4413 | /* | |
d2956687 JG |
4414 | * The trace chunk registry, as used by the consumer daemon, implicitly |
4415 | * owns the trace chunks. This is only needed in the consumer since | |
4416 | * the consumer has no notion of a session beyond session IDs being | |
4417 | * used to identify other objects. | |
4418 | * | |
4419 | * The lttng_trace_chunk_registry_publish() call below provides a | |
4420 | * reference which is not released; it implicitly becomes the session | |
4421 | * daemon's reference to the chunk in the consumer daemon. | |
4422 | * | |
4423 | * The lifetime of trace chunks in the consumer daemon is managed by | |
4424 | * the session daemon through the LTTNG_CONSUMER_CREATE_TRACE_CHUNK | |
4425 | * and LTTNG_CONSUMER_DESTROY_TRACE_CHUNK commands. | |
92816cc3 | 4426 | */ |
d2956687 JG |
4427 | created_chunk = lttng_trace_chunk_create(chunk_id, |
4428 | chunk_creation_timestamp); | |
4429 | if (!created_chunk) { | |
4430 | ERR("Failed to create trace chunk"); | |
4431 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
4432 | goto end; | |
4433 | } | |
92816cc3 | 4434 | |
d2956687 JG |
4435 | if (chunk_override_name) { |
4436 | chunk_status = lttng_trace_chunk_override_name(created_chunk, | |
4437 | chunk_override_name); | |
4438 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4439 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
92816cc3 JG |
4440 | goto end; |
4441 | } | |
4442 | } | |
4443 | ||
d2956687 JG |
4444 | if (chunk_directory_handle) { |
4445 | chunk_status = lttng_trace_chunk_set_credentials(created_chunk, | |
4446 | credentials); | |
4447 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4448 | ERR("Failed to set trace chunk credentials"); | |
4449 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
4450 | goto end; | |
4451 | } | |
4452 | /* | |
4453 | * The consumer daemon has no ownership of the chunk output | |
4454 | * directory. | |
4455 | */ | |
4456 | chunk_status = lttng_trace_chunk_set_as_user(created_chunk, | |
4457 | chunk_directory_handle); | |
4458 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4459 | ERR("Failed to set trace chunk's directory handle"); | |
4460 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
92816cc3 JG |
4461 | goto end; |
4462 | } | |
4463 | } | |
4464 | ||
d2956687 JG |
4465 | published_chunk = lttng_trace_chunk_registry_publish_chunk( |
4466 | consumer_data.chunk_registry, session_id, | |
4467 | created_chunk); | |
4468 | lttng_trace_chunk_put(created_chunk); | |
4469 | created_chunk = NULL; | |
4470 | if (!published_chunk) { | |
4471 | ERR("Failed to publish trace chunk"); | |
4472 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
d88744a4 JD |
4473 | goto end; |
4474 | } | |
4475 | ||
d2956687 JG |
4476 | rcu_read_lock(); |
4477 | cds_lfht_for_each_entry_duplicate(consumer_data.channels_by_session_id_ht->ht, | |
4478 | consumer_data.channels_by_session_id_ht->hash_fct( | |
4479 | &session_id, lttng_ht_seed), | |
4480 | consumer_data.channels_by_session_id_ht->match_fct, | |
4481 | &session_id, &iter.iter, channel, | |
4482 | channels_by_session_id_ht_node.node) { | |
4483 | ret = lttng_consumer_channel_set_trace_chunk(channel, | |
4484 | published_chunk); | |
4485 | if (ret) { | |
4486 | /* | |
4487 | * Roll-back the creation of this chunk. | |
4488 | * | |
4489 | * This is important since the session daemon will | |
4490 | * assume that the creation of this chunk failed and | |
4491 | * will never ask for it to be closed, resulting | |
4492 | * in a leak and an inconsistent state for some | |
4493 | * channels. | |
4494 | */ | |
4495 | enum lttcomm_return_code close_ret; | |
4496 | ||
4497 | DBG("Failed to set new trace chunk on existing channels, rolling back"); | |
4498 | close_ret = lttng_consumer_close_trace_chunk(relayd_id, | |
4499 | session_id, chunk_id, | |
4500 | chunk_creation_timestamp); | |
4501 | if (close_ret != LTTCOMM_CONSUMERD_SUCCESS) { | |
4502 | ERR("Failed to roll-back the creation of new chunk: session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
4503 | session_id, chunk_id); | |
4504 | } | |
a1ae2ea5 | 4505 | |
d2956687 JG |
4506 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; |
4507 | break; | |
4508 | } | |
a1ae2ea5 JD |
4509 | } |
4510 | ||
e5add6d0 JG |
4511 | if (relayd_id) { |
4512 | struct consumer_relayd_sock_pair *relayd; | |
4513 | ||
4514 | relayd = consumer_find_relayd(*relayd_id); | |
4515 | if (relayd) { | |
4516 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
4517 | ret = relayd_create_trace_chunk( | |
4518 | &relayd->control_sock, published_chunk); | |
4519 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
4520 | } else { | |
4521 | ERR("Failed to find relay daemon socket: relayd_id = %" PRIu64, *relayd_id); | |
4522 | } | |
4523 | ||
4524 | if (!relayd || ret) { | |
4525 | enum lttcomm_return_code close_ret; | |
4526 | ||
4527 | close_ret = lttng_consumer_close_trace_chunk(relayd_id, | |
4528 | session_id, | |
4529 | chunk_id, | |
4530 | chunk_creation_timestamp); | |
4531 | if (close_ret != LTTCOMM_CONSUMERD_SUCCESS) { | |
4532 | ERR("Failed to roll-back the creation of new chunk: session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
4533 | session_id, | |
4534 | chunk_id); | |
4535 | } | |
4536 | ||
4537 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
4538 | goto error; | |
4539 | } | |
4540 | } | |
4541 | error: | |
4542 | rcu_read_unlock(); | |
d2956687 JG |
4543 | /* Release the reference returned by the "publish" operation. */ |
4544 | lttng_trace_chunk_put(published_chunk); | |
a1ae2ea5 | 4545 | end: |
d2956687 | 4546 | return ret_code; |
a1ae2ea5 JD |
4547 | } |
4548 | ||
d2956687 JG |
4549 | enum lttcomm_return_code lttng_consumer_close_trace_chunk( |
4550 | const uint64_t *relayd_id, uint64_t session_id, | |
4551 | uint64_t chunk_id, time_t chunk_close_timestamp) | |
a1ae2ea5 | 4552 | { |
d2956687 JG |
4553 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
4554 | struct lttng_trace_chunk *chunk; | |
4555 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4556 | const char *relayd_id_str = "(none)"; | |
4557 | struct lttng_ht_iter iter; | |
4558 | struct lttng_consumer_channel *channel; | |
4559 | enum lttng_trace_chunk_status chunk_status; | |
a1ae2ea5 | 4560 | |
d2956687 JG |
4561 | if (relayd_id) { |
4562 | int ret; | |
4563 | ||
4564 | /* Only used for logging purposes. */ | |
4565 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), | |
4566 | "%" PRIu64, *relayd_id); | |
4567 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { | |
4568 | relayd_id_str = relayd_id_buffer; | |
4569 | } else { | |
4570 | relayd_id_str = "(formatting error)"; | |
4571 | } | |
4572 | } | |
4573 | ||
4574 | DBG("Consumer close trace chunk command: relayd_id = %s" | |
4575 | ", session_id = %" PRIu64 | |
4576 | ", chunk_id = %" PRIu64, relayd_id_str, | |
4577 | session_id, chunk_id); | |
4578 | chunk = lttng_trace_chunk_registry_find_chunk( | |
4579 | consumer_data.chunk_registry, session_id, | |
4580 | chunk_id); | |
4581 | if (!chunk) { | |
4582 | ERR("Failed to find chunk: session_id = %" PRIu64 | |
4583 | ", chunk_id = %" PRIu64, | |
4584 | session_id, chunk_id); | |
4585 | ret_code = LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; | |
a1ae2ea5 JD |
4586 | goto end; |
4587 | } | |
4588 | ||
d2956687 JG |
4589 | chunk_status = lttng_trace_chunk_set_close_timestamp(chunk, |
4590 | chunk_close_timestamp); | |
4591 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4592 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4593 | goto end; | |
45f1d9a1 | 4594 | } |
d2956687 JG |
4595 | /* |
4596 | * Release the reference returned by the "find" operation and | |
4597 | * the session daemon's implicit reference to the chunk. | |
4598 | */ | |
4599 | lttng_trace_chunk_put(chunk); | |
4600 | lttng_trace_chunk_put(chunk); | |
a1ae2ea5 | 4601 | |
d2956687 JG |
4602 | /* |
4603 | * chunk is now invalid to access as we no longer hold a reference to | |
4604 | * it; it is only kept around to compare it (by address) to the | |
4605 | * current chunk found in the session's channels. | |
4606 | */ | |
4607 | rcu_read_lock(); | |
4608 | cds_lfht_for_each_entry(consumer_data.channel_ht->ht, &iter.iter, | |
4609 | channel, node.node) { | |
4610 | int ret; | |
a1ae2ea5 | 4611 | |
d2956687 JG |
4612 | /* |
4613 | * Only change the channel's chunk to NULL if it still | |
4614 | * references the chunk being closed. The channel may | |
4615 | * reference a newer channel in the case of a session | |
4616 | * rotation. When a session rotation occurs, the "next" | |
4617 | * chunk is created before the "current" chunk is closed. | |
4618 | */ | |
4619 | if (channel->trace_chunk != chunk) { | |
4620 | continue; | |
4621 | } | |
4622 | ret = lttng_consumer_channel_set_trace_chunk(channel, NULL); | |
4623 | if (ret) { | |
4624 | /* | |
4625 | * Attempt to close the chunk on as many channels as | |
4626 | * possible. | |
4627 | */ | |
4628 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4629 | } | |
a1ae2ea5 | 4630 | } |
d2956687 JG |
4631 | rcu_read_unlock(); |
4632 | end: | |
4633 | return ret_code; | |
a1ae2ea5 | 4634 | } |
3654ed19 | 4635 | |
d2956687 JG |
4636 | enum lttcomm_return_code lttng_consumer_trace_chunk_exists( |
4637 | const uint64_t *relayd_id, uint64_t session_id, | |
4638 | uint64_t chunk_id) | |
3654ed19 | 4639 | { |
d2956687 JG |
4640 | enum lttcomm_return_code ret_code; |
4641 | struct lttng_trace_chunk *chunk; | |
4642 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4643 | const char *relayd_id_str = "(none)"; | |
4644 | ||
4645 | if (relayd_id) { | |
4646 | int ret; | |
4647 | ||
4648 | /* Only used for logging purposes. */ | |
4649 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), | |
4650 | "%" PRIu64, *relayd_id); | |
4651 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { | |
4652 | relayd_id_str = relayd_id_buffer; | |
4653 | } else { | |
4654 | relayd_id_str = "(formatting error)"; | |
4655 | } | |
4656 | } | |
4657 | ||
4658 | DBG("Consumer trace chunk exists command: relayd_id = %s" | |
4659 | ", session_id = %" PRIu64 | |
4660 | ", chunk_id = %" PRIu64, relayd_id_str, | |
4661 | session_id, chunk_id); | |
4662 | chunk = lttng_trace_chunk_registry_find_chunk( | |
4663 | consumer_data.chunk_registry, session_id, | |
4664 | chunk_id); | |
4665 | DBG("Trace chunk %s locally", chunk ? "exists" : "does not exist"); | |
4666 | ret_code = chunk ? LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL : | |
4667 | LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; | |
4668 | ||
4669 | lttng_trace_chunk_put(chunk); | |
4670 | return ret_code; | |
3654ed19 | 4671 | } |