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> | |
c35f9726 | 55 | #include <common/dynamic-array.h> |
3bd1e081 MD |
56 | |
57 | struct lttng_consumer_global_data consumer_data = { | |
3bd1e081 MD |
58 | .stream_count = 0, |
59 | .need_update = 1, | |
60 | .type = LTTNG_CONSUMER_UNKNOWN, | |
61 | }; | |
62 | ||
d8ef542d MD |
63 | enum consumer_channel_action { |
64 | CONSUMER_CHANNEL_ADD, | |
a0cbdd2e | 65 | CONSUMER_CHANNEL_DEL, |
d8ef542d MD |
66 | CONSUMER_CHANNEL_QUIT, |
67 | }; | |
68 | ||
69 | struct consumer_channel_msg { | |
70 | enum consumer_channel_action action; | |
a0cbdd2e MD |
71 | struct lttng_consumer_channel *chan; /* add */ |
72 | uint64_t key; /* del */ | |
d8ef542d MD |
73 | }; |
74 | ||
80957876 | 75 | /* Flag used to temporarily pause data consumption from testpoints. */ |
cf0bcb51 JG |
76 | int data_consumption_paused; |
77 | ||
3bd1e081 MD |
78 | /* |
79 | * Flag to inform the polling thread to quit when all fd hung up. Updated by | |
80 | * the consumer_thread_receive_fds when it notices that all fds has hung up. | |
81 | * Also updated by the signal handler (consumer_should_exit()). Read by the | |
82 | * polling threads. | |
83 | */ | |
10211f5c | 84 | int consumer_quit; |
3bd1e081 | 85 | |
43c34bc3 | 86 | /* |
43c34bc3 DG |
87 | * Global hash table containing respectively metadata and data streams. The |
88 | * stream element in this ht should only be updated by the metadata poll thread | |
89 | * for the metadata and the data poll thread for the data. | |
90 | */ | |
40dc48e0 DG |
91 | static struct lttng_ht *metadata_ht; |
92 | static struct lttng_ht *data_ht; | |
43c34bc3 | 93 | |
5da88b0f MD |
94 | static const char *get_consumer_domain(void) |
95 | { | |
96 | switch (consumer_data.type) { | |
97 | case LTTNG_CONSUMER_KERNEL: | |
98 | return DEFAULT_KERNEL_TRACE_DIR; | |
99 | case LTTNG_CONSUMER64_UST: | |
100 | /* Fall-through. */ | |
101 | case LTTNG_CONSUMER32_UST: | |
102 | return DEFAULT_UST_TRACE_DIR; | |
103 | default: | |
104 | abort(); | |
105 | } | |
106 | } | |
107 | ||
acdb9057 DG |
108 | /* |
109 | * Notify a thread lttng pipe to poll back again. This usually means that some | |
110 | * global state has changed so we just send back the thread in a poll wait | |
111 | * call. | |
112 | */ | |
113 | static void notify_thread_lttng_pipe(struct lttng_pipe *pipe) | |
114 | { | |
115 | struct lttng_consumer_stream *null_stream = NULL; | |
116 | ||
117 | assert(pipe); | |
118 | ||
119 | (void) lttng_pipe_write(pipe, &null_stream, sizeof(null_stream)); | |
120 | } | |
121 | ||
5c635c72 MD |
122 | static void notify_health_quit_pipe(int *pipe) |
123 | { | |
6cd525e8 | 124 | ssize_t ret; |
5c635c72 | 125 | |
6cd525e8 MD |
126 | ret = lttng_write(pipe[1], "4", 1); |
127 | if (ret < 1) { | |
5c635c72 MD |
128 | PERROR("write consumer health quit"); |
129 | } | |
130 | } | |
131 | ||
d8ef542d MD |
132 | static void notify_channel_pipe(struct lttng_consumer_local_data *ctx, |
133 | struct lttng_consumer_channel *chan, | |
a0cbdd2e | 134 | uint64_t key, |
d8ef542d MD |
135 | enum consumer_channel_action action) |
136 | { | |
137 | struct consumer_channel_msg msg; | |
6cd525e8 | 138 | ssize_t ret; |
d8ef542d | 139 | |
e56251fc DG |
140 | memset(&msg, 0, sizeof(msg)); |
141 | ||
d8ef542d MD |
142 | msg.action = action; |
143 | msg.chan = chan; | |
f21dae48 | 144 | msg.key = key; |
6cd525e8 MD |
145 | ret = lttng_write(ctx->consumer_channel_pipe[1], &msg, sizeof(msg)); |
146 | if (ret < sizeof(msg)) { | |
147 | PERROR("notify_channel_pipe write error"); | |
148 | } | |
d8ef542d MD |
149 | } |
150 | ||
a0cbdd2e MD |
151 | void notify_thread_del_channel(struct lttng_consumer_local_data *ctx, |
152 | uint64_t key) | |
153 | { | |
154 | notify_channel_pipe(ctx, NULL, key, CONSUMER_CHANNEL_DEL); | |
155 | } | |
156 | ||
d8ef542d MD |
157 | static int read_channel_pipe(struct lttng_consumer_local_data *ctx, |
158 | struct lttng_consumer_channel **chan, | |
a0cbdd2e | 159 | uint64_t *key, |
d8ef542d MD |
160 | enum consumer_channel_action *action) |
161 | { | |
162 | struct consumer_channel_msg msg; | |
6cd525e8 | 163 | ssize_t ret; |
d8ef542d | 164 | |
6cd525e8 MD |
165 | ret = lttng_read(ctx->consumer_channel_pipe[0], &msg, sizeof(msg)); |
166 | if (ret < sizeof(msg)) { | |
167 | ret = -1; | |
168 | goto error; | |
d8ef542d | 169 | } |
6cd525e8 MD |
170 | *action = msg.action; |
171 | *chan = msg.chan; | |
172 | *key = msg.key; | |
173 | error: | |
174 | return (int) ret; | |
d8ef542d MD |
175 | } |
176 | ||
212d67a2 DG |
177 | /* |
178 | * Cleanup the stream list of a channel. Those streams are not yet globally | |
179 | * visible | |
180 | */ | |
181 | static void clean_channel_stream_list(struct lttng_consumer_channel *channel) | |
182 | { | |
183 | struct lttng_consumer_stream *stream, *stmp; | |
184 | ||
185 | assert(channel); | |
186 | ||
187 | /* Delete streams that might have been left in the stream list. */ | |
188 | cds_list_for_each_entry_safe(stream, stmp, &channel->streams.head, | |
189 | send_node) { | |
190 | cds_list_del(&stream->send_node); | |
191 | /* | |
192 | * Once a stream is added to this list, the buffers were created so we | |
193 | * have a guarantee that this call will succeed. Setting the monitor | |
194 | * mode to 0 so we don't lock nor try to delete the stream from the | |
195 | * global hash table. | |
196 | */ | |
197 | stream->monitor = 0; | |
198 | consumer_stream_destroy(stream, NULL); | |
199 | } | |
200 | } | |
201 | ||
3bd1e081 MD |
202 | /* |
203 | * Find a stream. The consumer_data.lock must be locked during this | |
204 | * call. | |
205 | */ | |
d88aee68 | 206 | static struct lttng_consumer_stream *find_stream(uint64_t key, |
8389e4f8 | 207 | struct lttng_ht *ht) |
3bd1e081 | 208 | { |
e4421fec | 209 | struct lttng_ht_iter iter; |
d88aee68 | 210 | struct lttng_ht_node_u64 *node; |
e4421fec | 211 | struct lttng_consumer_stream *stream = NULL; |
3bd1e081 | 212 | |
8389e4f8 DG |
213 | assert(ht); |
214 | ||
d88aee68 DG |
215 | /* -1ULL keys are lookup failures */ |
216 | if (key == (uint64_t) -1ULL) { | |
7ad0a0cb | 217 | return NULL; |
7a57cf92 | 218 | } |
e4421fec | 219 | |
6065ceec DG |
220 | rcu_read_lock(); |
221 | ||
d88aee68 DG |
222 | lttng_ht_lookup(ht, &key, &iter); |
223 | node = lttng_ht_iter_get_node_u64(&iter); | |
e4421fec DG |
224 | if (node != NULL) { |
225 | stream = caa_container_of(node, struct lttng_consumer_stream, node); | |
3bd1e081 | 226 | } |
e4421fec | 227 | |
6065ceec DG |
228 | rcu_read_unlock(); |
229 | ||
e4421fec | 230 | return stream; |
3bd1e081 MD |
231 | } |
232 | ||
da009f2c | 233 | static void steal_stream_key(uint64_t key, struct lttng_ht *ht) |
7ad0a0cb MD |
234 | { |
235 | struct lttng_consumer_stream *stream; | |
236 | ||
04253271 | 237 | rcu_read_lock(); |
ffe60014 | 238 | stream = find_stream(key, ht); |
04253271 | 239 | if (stream) { |
da009f2c | 240 | stream->key = (uint64_t) -1ULL; |
04253271 MD |
241 | /* |
242 | * We don't want the lookup to match, but we still need | |
243 | * to iterate on this stream when iterating over the hash table. Just | |
244 | * change the node key. | |
245 | */ | |
da009f2c | 246 | stream->node.key = (uint64_t) -1ULL; |
04253271 MD |
247 | } |
248 | rcu_read_unlock(); | |
7ad0a0cb MD |
249 | } |
250 | ||
d56db448 DG |
251 | /* |
252 | * Return a channel object for the given key. | |
253 | * | |
254 | * RCU read side lock MUST be acquired before calling this function and | |
255 | * protects the channel ptr. | |
256 | */ | |
d88aee68 | 257 | struct lttng_consumer_channel *consumer_find_channel(uint64_t key) |
3bd1e081 | 258 | { |
e4421fec | 259 | struct lttng_ht_iter iter; |
d88aee68 | 260 | struct lttng_ht_node_u64 *node; |
e4421fec | 261 | struct lttng_consumer_channel *channel = NULL; |
3bd1e081 | 262 | |
d88aee68 DG |
263 | /* -1ULL keys are lookup failures */ |
264 | if (key == (uint64_t) -1ULL) { | |
7ad0a0cb | 265 | return NULL; |
7a57cf92 | 266 | } |
e4421fec | 267 | |
d88aee68 DG |
268 | lttng_ht_lookup(consumer_data.channel_ht, &key, &iter); |
269 | node = lttng_ht_iter_get_node_u64(&iter); | |
e4421fec DG |
270 | if (node != NULL) { |
271 | channel = caa_container_of(node, struct lttng_consumer_channel, node); | |
3bd1e081 | 272 | } |
e4421fec DG |
273 | |
274 | return channel; | |
3bd1e081 MD |
275 | } |
276 | ||
b5a6470f DG |
277 | /* |
278 | * There is a possibility that the consumer does not have enough time between | |
279 | * the close of the channel on the session daemon and the cleanup in here thus | |
280 | * once we have a channel add with an existing key, we know for sure that this | |
281 | * channel will eventually get cleaned up by all streams being closed. | |
282 | * | |
283 | * This function just nullifies the already existing channel key. | |
284 | */ | |
285 | static void steal_channel_key(uint64_t key) | |
286 | { | |
287 | struct lttng_consumer_channel *channel; | |
288 | ||
289 | rcu_read_lock(); | |
290 | channel = consumer_find_channel(key); | |
291 | if (channel) { | |
292 | channel->key = (uint64_t) -1ULL; | |
293 | /* | |
294 | * We don't want the lookup to match, but we still need to iterate on | |
295 | * this channel when iterating over the hash table. Just change the | |
296 | * node key. | |
297 | */ | |
298 | channel->node.key = (uint64_t) -1ULL; | |
299 | } | |
300 | rcu_read_unlock(); | |
301 | } | |
302 | ||
ffe60014 | 303 | static void free_channel_rcu(struct rcu_head *head) |
702b1ea4 | 304 | { |
d88aee68 DG |
305 | struct lttng_ht_node_u64 *node = |
306 | caa_container_of(head, struct lttng_ht_node_u64, head); | |
ffe60014 DG |
307 | struct lttng_consumer_channel *channel = |
308 | caa_container_of(node, struct lttng_consumer_channel, node); | |
702b1ea4 | 309 | |
b83e03c4 MD |
310 | switch (consumer_data.type) { |
311 | case LTTNG_CONSUMER_KERNEL: | |
312 | break; | |
313 | case LTTNG_CONSUMER32_UST: | |
314 | case LTTNG_CONSUMER64_UST: | |
315 | lttng_ustconsumer_free_channel(channel); | |
316 | break; | |
317 | default: | |
318 | ERR("Unknown consumer_data type"); | |
319 | abort(); | |
320 | } | |
ffe60014 | 321 | free(channel); |
702b1ea4 MD |
322 | } |
323 | ||
00e2e675 DG |
324 | /* |
325 | * RCU protected relayd socket pair free. | |
326 | */ | |
ffe60014 | 327 | static void free_relayd_rcu(struct rcu_head *head) |
00e2e675 | 328 | { |
d88aee68 DG |
329 | struct lttng_ht_node_u64 *node = |
330 | caa_container_of(head, struct lttng_ht_node_u64, head); | |
00e2e675 DG |
331 | struct consumer_relayd_sock_pair *relayd = |
332 | caa_container_of(node, struct consumer_relayd_sock_pair, node); | |
333 | ||
8994307f DG |
334 | /* |
335 | * Close all sockets. This is done in the call RCU since we don't want the | |
336 | * socket fds to be reassigned thus potentially creating bad state of the | |
337 | * relayd object. | |
338 | * | |
339 | * We do not have to lock the control socket mutex here since at this stage | |
340 | * there is no one referencing to this relayd object. | |
341 | */ | |
342 | (void) relayd_close(&relayd->control_sock); | |
343 | (void) relayd_close(&relayd->data_sock); | |
344 | ||
3a84e2f3 | 345 | pthread_mutex_destroy(&relayd->ctrl_sock_mutex); |
00e2e675 DG |
346 | free(relayd); |
347 | } | |
348 | ||
349 | /* | |
350 | * Destroy and free relayd socket pair object. | |
00e2e675 | 351 | */ |
51230d70 | 352 | void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd) |
00e2e675 DG |
353 | { |
354 | int ret; | |
355 | struct lttng_ht_iter iter; | |
356 | ||
173af62f DG |
357 | if (relayd == NULL) { |
358 | return; | |
359 | } | |
360 | ||
00e2e675 DG |
361 | DBG("Consumer destroy and close relayd socket pair"); |
362 | ||
363 | iter.iter.node = &relayd->node.node; | |
364 | ret = lttng_ht_del(consumer_data.relayd_ht, &iter); | |
173af62f | 365 | if (ret != 0) { |
8994307f | 366 | /* We assume the relayd is being or is destroyed */ |
173af62f DG |
367 | return; |
368 | } | |
00e2e675 | 369 | |
00e2e675 | 370 | /* RCU free() call */ |
ffe60014 DG |
371 | call_rcu(&relayd->node.head, free_relayd_rcu); |
372 | } | |
373 | ||
374 | /* | |
375 | * Remove a channel from the global list protected by a mutex. This function is | |
376 | * also responsible for freeing its data structures. | |
377 | */ | |
378 | void consumer_del_channel(struct lttng_consumer_channel *channel) | |
379 | { | |
ffe60014 DG |
380 | struct lttng_ht_iter iter; |
381 | ||
d88aee68 | 382 | DBG("Consumer delete channel key %" PRIu64, channel->key); |
ffe60014 DG |
383 | |
384 | pthread_mutex_lock(&consumer_data.lock); | |
a9838785 | 385 | pthread_mutex_lock(&channel->lock); |
ffe60014 | 386 | |
212d67a2 DG |
387 | /* Destroy streams that might have been left in the stream list. */ |
388 | clean_channel_stream_list(channel); | |
51e762e5 | 389 | |
d3e2ba59 JD |
390 | if (channel->live_timer_enabled == 1) { |
391 | consumer_timer_live_stop(channel); | |
392 | } | |
e9404c27 JG |
393 | if (channel->monitor_timer_enabled == 1) { |
394 | consumer_timer_monitor_stop(channel); | |
395 | } | |
d3e2ba59 | 396 | |
ffe60014 DG |
397 | switch (consumer_data.type) { |
398 | case LTTNG_CONSUMER_KERNEL: | |
399 | break; | |
400 | case LTTNG_CONSUMER32_UST: | |
401 | case LTTNG_CONSUMER64_UST: | |
402 | lttng_ustconsumer_del_channel(channel); | |
403 | break; | |
404 | default: | |
405 | ERR("Unknown consumer_data type"); | |
406 | assert(0); | |
407 | goto end; | |
408 | } | |
409 | ||
d2956687 JG |
410 | lttng_trace_chunk_put(channel->trace_chunk); |
411 | channel->trace_chunk = NULL; | |
5c3892a6 | 412 | |
d2956687 JG |
413 | if (channel->is_published) { |
414 | int ret; | |
415 | ||
416 | rcu_read_lock(); | |
417 | iter.iter.node = &channel->node.node; | |
418 | ret = lttng_ht_del(consumer_data.channel_ht, &iter); | |
419 | assert(!ret); | |
ffe60014 | 420 | |
d2956687 JG |
421 | iter.iter.node = &channel->channels_by_session_id_ht_node.node; |
422 | ret = lttng_ht_del(consumer_data.channels_by_session_id_ht, | |
423 | &iter); | |
424 | assert(!ret); | |
425 | rcu_read_unlock(); | |
426 | } | |
427 | ||
b6921a17 JG |
428 | channel->is_deleted = true; |
429 | call_rcu(&channel->node.head, free_channel_rcu); | |
ffe60014 | 430 | end: |
a9838785 | 431 | pthread_mutex_unlock(&channel->lock); |
ffe60014 | 432 | pthread_mutex_unlock(&consumer_data.lock); |
00e2e675 DG |
433 | } |
434 | ||
228b5bf7 DG |
435 | /* |
436 | * Iterate over the relayd hash table and destroy each element. Finally, | |
437 | * destroy the whole hash table. | |
438 | */ | |
439 | static void cleanup_relayd_ht(void) | |
440 | { | |
441 | struct lttng_ht_iter iter; | |
442 | struct consumer_relayd_sock_pair *relayd; | |
443 | ||
444 | rcu_read_lock(); | |
445 | ||
446 | cds_lfht_for_each_entry(consumer_data.relayd_ht->ht, &iter.iter, relayd, | |
447 | node.node) { | |
51230d70 | 448 | consumer_destroy_relayd(relayd); |
228b5bf7 DG |
449 | } |
450 | ||
228b5bf7 | 451 | rcu_read_unlock(); |
36b588ed MD |
452 | |
453 | lttng_ht_destroy(consumer_data.relayd_ht); | |
228b5bf7 DG |
454 | } |
455 | ||
8994307f DG |
456 | /* |
457 | * Update the end point status of all streams having the given network sequence | |
458 | * index (relayd index). | |
459 | * | |
460 | * It's atomically set without having the stream mutex locked which is fine | |
461 | * because we handle the write/read race with a pipe wakeup for each thread. | |
462 | */ | |
da009f2c | 463 | static void update_endpoint_status_by_netidx(uint64_t net_seq_idx, |
8994307f DG |
464 | enum consumer_endpoint_status status) |
465 | { | |
466 | struct lttng_ht_iter iter; | |
467 | struct lttng_consumer_stream *stream; | |
468 | ||
da009f2c | 469 | DBG("Consumer set delete flag on stream by idx %" PRIu64, net_seq_idx); |
8994307f DG |
470 | |
471 | rcu_read_lock(); | |
472 | ||
473 | /* Let's begin with metadata */ | |
474 | cds_lfht_for_each_entry(metadata_ht->ht, &iter.iter, stream, node.node) { | |
475 | if (stream->net_seq_idx == net_seq_idx) { | |
476 | uatomic_set(&stream->endpoint_status, status); | |
477 | DBG("Delete flag set to metadata stream %d", stream->wait_fd); | |
478 | } | |
479 | } | |
480 | ||
481 | /* Follow up by the data streams */ | |
482 | cds_lfht_for_each_entry(data_ht->ht, &iter.iter, stream, node.node) { | |
483 | if (stream->net_seq_idx == net_seq_idx) { | |
484 | uatomic_set(&stream->endpoint_status, status); | |
485 | DBG("Delete flag set to data stream %d", stream->wait_fd); | |
486 | } | |
487 | } | |
488 | rcu_read_unlock(); | |
489 | } | |
490 | ||
491 | /* | |
492 | * Cleanup a relayd object by flagging every associated streams for deletion, | |
493 | * destroying the object meaning removing it from the relayd hash table, | |
494 | * closing the sockets and freeing the memory in a RCU call. | |
495 | * | |
496 | * If a local data context is available, notify the threads that the streams' | |
497 | * state have changed. | |
498 | */ | |
9276e5c8 | 499 | void lttng_consumer_cleanup_relayd(struct consumer_relayd_sock_pair *relayd) |
8994307f | 500 | { |
da009f2c | 501 | uint64_t netidx; |
8994307f DG |
502 | |
503 | assert(relayd); | |
504 | ||
9276e5c8 | 505 | DBG("Cleaning up relayd object ID %"PRIu64, relayd->net_seq_idx); |
9617607b | 506 | |
8994307f DG |
507 | /* Save the net sequence index before destroying the object */ |
508 | netidx = relayd->net_seq_idx; | |
509 | ||
510 | /* | |
511 | * Delete the relayd from the relayd hash table, close the sockets and free | |
512 | * the object in a RCU call. | |
513 | */ | |
51230d70 | 514 | consumer_destroy_relayd(relayd); |
8994307f DG |
515 | |
516 | /* Set inactive endpoint to all streams */ | |
517 | update_endpoint_status_by_netidx(netidx, CONSUMER_ENDPOINT_INACTIVE); | |
518 | ||
519 | /* | |
520 | * With a local data context, notify the threads that the streams' state | |
521 | * have changed. The write() action on the pipe acts as an "implicit" | |
522 | * memory barrier ordering the updates of the end point status from the | |
523 | * read of this status which happens AFTER receiving this notify. | |
524 | */ | |
9276e5c8 JR |
525 | notify_thread_lttng_pipe(relayd->ctx->consumer_data_pipe); |
526 | notify_thread_lttng_pipe(relayd->ctx->consumer_metadata_pipe); | |
8994307f DG |
527 | } |
528 | ||
a6ba4fe1 DG |
529 | /* |
530 | * Flag a relayd socket pair for destruction. Destroy it if the refcount | |
531 | * reaches zero. | |
532 | * | |
533 | * RCU read side lock MUST be aquired before calling this function. | |
534 | */ | |
535 | void consumer_flag_relayd_for_destroy(struct consumer_relayd_sock_pair *relayd) | |
536 | { | |
537 | assert(relayd); | |
538 | ||
539 | /* Set destroy flag for this object */ | |
540 | uatomic_set(&relayd->destroy_flag, 1); | |
541 | ||
542 | /* Destroy the relayd if refcount is 0 */ | |
543 | if (uatomic_read(&relayd->refcount) == 0) { | |
51230d70 | 544 | consumer_destroy_relayd(relayd); |
a6ba4fe1 DG |
545 | } |
546 | } | |
547 | ||
3bd1e081 | 548 | /* |
1d1a276c DG |
549 | * Completly destroy stream from every visiable data structure and the given |
550 | * hash table if one. | |
551 | * | |
552 | * One this call returns, the stream object is not longer usable nor visible. | |
3bd1e081 | 553 | */ |
e316aad5 DG |
554 | void consumer_del_stream(struct lttng_consumer_stream *stream, |
555 | struct lttng_ht *ht) | |
3bd1e081 | 556 | { |
1d1a276c | 557 | consumer_stream_destroy(stream, ht); |
3bd1e081 MD |
558 | } |
559 | ||
5ab66908 MD |
560 | /* |
561 | * XXX naming of del vs destroy is all mixed up. | |
562 | */ | |
563 | void consumer_del_stream_for_data(struct lttng_consumer_stream *stream) | |
564 | { | |
565 | consumer_stream_destroy(stream, data_ht); | |
566 | } | |
567 | ||
568 | void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream) | |
569 | { | |
570 | consumer_stream_destroy(stream, metadata_ht); | |
571 | } | |
572 | ||
d9a2e16e JD |
573 | void consumer_stream_update_channel_attributes( |
574 | struct lttng_consumer_stream *stream, | |
575 | struct lttng_consumer_channel *channel) | |
576 | { | |
577 | stream->channel_read_only_attributes.tracefile_size = | |
578 | channel->tracefile_size; | |
d9a2e16e JD |
579 | } |
580 | ||
d88aee68 DG |
581 | struct lttng_consumer_stream *consumer_allocate_stream(uint64_t channel_key, |
582 | uint64_t stream_key, | |
ffe60014 | 583 | const char *channel_name, |
57a269f2 | 584 | uint64_t relayd_id, |
53632229 | 585 | uint64_t session_id, |
d2956687 | 586 | struct lttng_trace_chunk *trace_chunk, |
ffe60014 DG |
587 | int cpu, |
588 | int *alloc_ret, | |
4891ece8 | 589 | enum consumer_channel_type type, |
d2956687 | 590 | unsigned int monitor) |
3bd1e081 | 591 | { |
ffe60014 | 592 | int ret; |
3bd1e081 | 593 | struct lttng_consumer_stream *stream; |
3bd1e081 | 594 | |
effcf122 | 595 | stream = zmalloc(sizeof(*stream)); |
3bd1e081 | 596 | if (stream == NULL) { |
7a57cf92 | 597 | PERROR("malloc struct lttng_consumer_stream"); |
ffe60014 | 598 | ret = -ENOMEM; |
7a57cf92 | 599 | goto end; |
3bd1e081 | 600 | } |
7a57cf92 | 601 | |
d2956687 JG |
602 | if (trace_chunk && !lttng_trace_chunk_get(trace_chunk)) { |
603 | ERR("Failed to acquire trace chunk reference during the creation of a stream"); | |
604 | ret = -1; | |
605 | goto error; | |
606 | } | |
d56db448 | 607 | |
d2956687 | 608 | rcu_read_lock(); |
3bd1e081 | 609 | stream->key = stream_key; |
d2956687 | 610 | stream->trace_chunk = trace_chunk; |
3bd1e081 MD |
611 | stream->out_fd = -1; |
612 | stream->out_fd_offset = 0; | |
e5d1a9b3 | 613 | stream->output_written = 0; |
ffe60014 | 614 | stream->net_seq_idx = relayd_id; |
53632229 | 615 | stream->session_id = session_id; |
4891ece8 | 616 | stream->monitor = monitor; |
774d490c | 617 | stream->endpoint_status = CONSUMER_ENDPOINT_ACTIVE; |
f8f3885c | 618 | stream->index_file = NULL; |
fb83fe64 | 619 | stream->last_sequence_number = -1ULL; |
a40a503f | 620 | stream->rotate_position = -1ULL; |
53632229 | 621 | pthread_mutex_init(&stream->lock, NULL); |
c585821b | 622 | pthread_mutex_init(&stream->metadata_timer_lock, NULL); |
58b1f425 | 623 | |
ffe60014 DG |
624 | /* If channel is the metadata, flag this stream as metadata. */ |
625 | if (type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
626 | stream->metadata_flag = 1; | |
627 | /* Metadata is flat out. */ | |
628 | strncpy(stream->name, DEFAULT_METADATA_NAME, sizeof(stream->name)); | |
94d49140 JD |
629 | /* Live rendez-vous point. */ |
630 | pthread_cond_init(&stream->metadata_rdv, NULL); | |
631 | pthread_mutex_init(&stream->metadata_rdv_lock, NULL); | |
58b1f425 | 632 | } else { |
ffe60014 DG |
633 | /* Format stream name to <channel_name>_<cpu_number> */ |
634 | ret = snprintf(stream->name, sizeof(stream->name), "%s_%d", | |
635 | channel_name, cpu); | |
636 | if (ret < 0) { | |
637 | PERROR("snprintf stream name"); | |
638 | goto error; | |
639 | } | |
58b1f425 | 640 | } |
c30aaa51 | 641 | |
ffe60014 | 642 | /* Key is always the wait_fd for streams. */ |
d88aee68 | 643 | lttng_ht_node_init_u64(&stream->node, stream->key); |
ffe60014 | 644 | |
d8ef542d MD |
645 | /* Init node per channel id key */ |
646 | lttng_ht_node_init_u64(&stream->node_channel_id, channel_key); | |
647 | ||
53632229 | 648 | /* Init session id node with the stream session id */ |
d88aee68 | 649 | lttng_ht_node_init_u64(&stream->node_session_id, stream->session_id); |
53632229 | 650 | |
07b86b52 JD |
651 | DBG3("Allocated stream %s (key %" PRIu64 ", chan_key %" PRIu64 |
652 | " relayd_id %" PRIu64 ", session_id %" PRIu64, | |
653 | stream->name, stream->key, channel_key, | |
654 | stream->net_seq_idx, stream->session_id); | |
d56db448 DG |
655 | |
656 | rcu_read_unlock(); | |
3bd1e081 | 657 | return stream; |
c80048c6 MD |
658 | |
659 | error: | |
d56db448 | 660 | rcu_read_unlock(); |
d2956687 | 661 | lttng_trace_chunk_put(stream->trace_chunk); |
c80048c6 | 662 | free(stream); |
7a57cf92 | 663 | end: |
ffe60014 DG |
664 | if (alloc_ret) { |
665 | *alloc_ret = ret; | |
666 | } | |
c80048c6 | 667 | return NULL; |
3bd1e081 MD |
668 | } |
669 | ||
670 | /* | |
671 | * Add a stream to the global list protected by a mutex. | |
672 | */ | |
66d583dc | 673 | void consumer_add_data_stream(struct lttng_consumer_stream *stream) |
3bd1e081 | 674 | { |
5ab66908 | 675 | struct lttng_ht *ht = data_ht; |
3bd1e081 | 676 | |
e316aad5 | 677 | assert(stream); |
43c34bc3 | 678 | assert(ht); |
c77fc10a | 679 | |
d88aee68 | 680 | DBG3("Adding consumer stream %" PRIu64, stream->key); |
e316aad5 DG |
681 | |
682 | pthread_mutex_lock(&consumer_data.lock); | |
a9838785 | 683 | pthread_mutex_lock(&stream->chan->lock); |
ec6ea7d0 | 684 | pthread_mutex_lock(&stream->chan->timer_lock); |
2e818a6a | 685 | pthread_mutex_lock(&stream->lock); |
b0b335c8 | 686 | rcu_read_lock(); |
e316aad5 | 687 | |
43c34bc3 | 688 | /* Steal stream identifier to avoid having streams with the same key */ |
ffe60014 | 689 | steal_stream_key(stream->key, ht); |
43c34bc3 | 690 | |
d88aee68 | 691 | lttng_ht_add_unique_u64(ht, &stream->node); |
00e2e675 | 692 | |
d8ef542d MD |
693 | lttng_ht_add_u64(consumer_data.stream_per_chan_id_ht, |
694 | &stream->node_channel_id); | |
695 | ||
ca22feea DG |
696 | /* |
697 | * Add stream to the stream_list_ht of the consumer data. No need to steal | |
698 | * the key since the HT does not use it and we allow to add redundant keys | |
699 | * into this table. | |
700 | */ | |
d88aee68 | 701 | lttng_ht_add_u64(consumer_data.stream_list_ht, &stream->node_session_id); |
ca22feea | 702 | |
e316aad5 | 703 | /* |
ffe60014 DG |
704 | * When nb_init_stream_left reaches 0, we don't need to trigger any action |
705 | * in terms of destroying the associated channel, because the action that | |
e316aad5 DG |
706 | * causes the count to become 0 also causes a stream to be added. The |
707 | * channel deletion will thus be triggered by the following removal of this | |
708 | * stream. | |
709 | */ | |
ffe60014 | 710 | if (uatomic_read(&stream->chan->nb_init_stream_left) > 0) { |
f2ad556d MD |
711 | /* Increment refcount before decrementing nb_init_stream_left */ |
712 | cmm_smp_wmb(); | |
ffe60014 | 713 | uatomic_dec(&stream->chan->nb_init_stream_left); |
e316aad5 DG |
714 | } |
715 | ||
716 | /* Update consumer data once the node is inserted. */ | |
3bd1e081 MD |
717 | consumer_data.stream_count++; |
718 | consumer_data.need_update = 1; | |
719 | ||
e316aad5 | 720 | rcu_read_unlock(); |
2e818a6a | 721 | pthread_mutex_unlock(&stream->lock); |
ec6ea7d0 | 722 | pthread_mutex_unlock(&stream->chan->timer_lock); |
a9838785 | 723 | pthread_mutex_unlock(&stream->chan->lock); |
3bd1e081 | 724 | pthread_mutex_unlock(&consumer_data.lock); |
3bd1e081 MD |
725 | } |
726 | ||
00e2e675 | 727 | /* |
3f8e211f DG |
728 | * Add relayd socket to global consumer data hashtable. RCU read side lock MUST |
729 | * be acquired before calling this. | |
00e2e675 | 730 | */ |
d09e1200 | 731 | static int add_relayd(struct consumer_relayd_sock_pair *relayd) |
00e2e675 DG |
732 | { |
733 | int ret = 0; | |
d88aee68 | 734 | struct lttng_ht_node_u64 *node; |
00e2e675 DG |
735 | struct lttng_ht_iter iter; |
736 | ||
ffe60014 | 737 | assert(relayd); |
00e2e675 | 738 | |
00e2e675 | 739 | lttng_ht_lookup(consumer_data.relayd_ht, |
d88aee68 DG |
740 | &relayd->net_seq_idx, &iter); |
741 | node = lttng_ht_iter_get_node_u64(&iter); | |
00e2e675 | 742 | if (node != NULL) { |
00e2e675 DG |
743 | goto end; |
744 | } | |
d88aee68 | 745 | lttng_ht_add_unique_u64(consumer_data.relayd_ht, &relayd->node); |
00e2e675 | 746 | |
00e2e675 DG |
747 | end: |
748 | return ret; | |
749 | } | |
750 | ||
751 | /* | |
752 | * Allocate and return a consumer relayd socket. | |
753 | */ | |
027a694f | 754 | static struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair( |
da009f2c | 755 | uint64_t net_seq_idx) |
00e2e675 DG |
756 | { |
757 | struct consumer_relayd_sock_pair *obj = NULL; | |
758 | ||
da009f2c MD |
759 | /* net sequence index of -1 is a failure */ |
760 | if (net_seq_idx == (uint64_t) -1ULL) { | |
00e2e675 DG |
761 | goto error; |
762 | } | |
763 | ||
764 | obj = zmalloc(sizeof(struct consumer_relayd_sock_pair)); | |
765 | if (obj == NULL) { | |
766 | PERROR("zmalloc relayd sock"); | |
767 | goto error; | |
768 | } | |
769 | ||
770 | obj->net_seq_idx = net_seq_idx; | |
771 | obj->refcount = 0; | |
173af62f | 772 | obj->destroy_flag = 0; |
f96e4545 MD |
773 | obj->control_sock.sock.fd = -1; |
774 | obj->data_sock.sock.fd = -1; | |
d88aee68 | 775 | lttng_ht_node_init_u64(&obj->node, obj->net_seq_idx); |
00e2e675 DG |
776 | pthread_mutex_init(&obj->ctrl_sock_mutex, NULL); |
777 | ||
778 | error: | |
779 | return obj; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Find a relayd socket pair in the global consumer data. | |
784 | * | |
785 | * Return the object if found else NULL. | |
b0b335c8 MD |
786 | * RCU read-side lock must be held across this call and while using the |
787 | * returned object. | |
00e2e675 | 788 | */ |
d88aee68 | 789 | struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key) |
00e2e675 DG |
790 | { |
791 | struct lttng_ht_iter iter; | |
d88aee68 | 792 | struct lttng_ht_node_u64 *node; |
00e2e675 DG |
793 | struct consumer_relayd_sock_pair *relayd = NULL; |
794 | ||
795 | /* Negative keys are lookup failures */ | |
d88aee68 | 796 | if (key == (uint64_t) -1ULL) { |
00e2e675 DG |
797 | goto error; |
798 | } | |
799 | ||
d88aee68 | 800 | lttng_ht_lookup(consumer_data.relayd_ht, &key, |
00e2e675 | 801 | &iter); |
d88aee68 | 802 | node = lttng_ht_iter_get_node_u64(&iter); |
00e2e675 DG |
803 | if (node != NULL) { |
804 | relayd = caa_container_of(node, struct consumer_relayd_sock_pair, node); | |
805 | } | |
806 | ||
00e2e675 DG |
807 | error: |
808 | return relayd; | |
809 | } | |
810 | ||
10a50311 JD |
811 | /* |
812 | * Find a relayd and send the stream | |
813 | * | |
814 | * Returns 0 on success, < 0 on error | |
815 | */ | |
816 | int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, | |
817 | char *path) | |
818 | { | |
819 | int ret = 0; | |
820 | struct consumer_relayd_sock_pair *relayd; | |
821 | ||
822 | assert(stream); | |
823 | assert(stream->net_seq_idx != -1ULL); | |
824 | assert(path); | |
825 | ||
826 | /* The stream is not metadata. Get relayd reference if exists. */ | |
827 | rcu_read_lock(); | |
828 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
829 | if (relayd != NULL) { | |
830 | /* Add stream on the relayd */ | |
831 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
832 | ret = relayd_add_stream(&relayd->control_sock, stream->name, | |
5da88b0f | 833 | get_consumer_domain(), path, &stream->relayd_stream_id, |
d2956687 JG |
834 | stream->chan->tracefile_size, |
835 | stream->chan->tracefile_count, | |
836 | stream->trace_chunk); | |
10a50311 JD |
837 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
838 | if (ret < 0) { | |
9276e5c8 JR |
839 | ERR("Relayd add stream failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
840 | lttng_consumer_cleanup_relayd(relayd); | |
10a50311 JD |
841 | goto end; |
842 | } | |
1c20f0e2 | 843 | |
10a50311 | 844 | uatomic_inc(&relayd->refcount); |
d01178b6 | 845 | stream->sent_to_relayd = 1; |
10a50311 JD |
846 | } else { |
847 | ERR("Stream %" PRIu64 " relayd ID %" PRIu64 " unknown. Can't send it.", | |
848 | stream->key, stream->net_seq_idx); | |
849 | ret = -1; | |
850 | goto end; | |
851 | } | |
852 | ||
853 | DBG("Stream %s with key %" PRIu64 " sent to relayd id %" PRIu64, | |
854 | stream->name, stream->key, stream->net_seq_idx); | |
855 | ||
856 | end: | |
857 | rcu_read_unlock(); | |
858 | return ret; | |
859 | } | |
860 | ||
a4baae1b JD |
861 | /* |
862 | * Find a relayd and send the streams sent message | |
863 | * | |
864 | * Returns 0 on success, < 0 on error | |
865 | */ | |
866 | int consumer_send_relayd_streams_sent(uint64_t net_seq_idx) | |
867 | { | |
868 | int ret = 0; | |
869 | struct consumer_relayd_sock_pair *relayd; | |
870 | ||
871 | assert(net_seq_idx != -1ULL); | |
872 | ||
873 | /* The stream is not metadata. Get relayd reference if exists. */ | |
874 | rcu_read_lock(); | |
875 | relayd = consumer_find_relayd(net_seq_idx); | |
876 | if (relayd != NULL) { | |
877 | /* Add stream on the relayd */ | |
878 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
879 | ret = relayd_streams_sent(&relayd->control_sock); | |
880 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
881 | if (ret < 0) { | |
9276e5c8 JR |
882 | ERR("Relayd streams sent failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
883 | lttng_consumer_cleanup_relayd(relayd); | |
a4baae1b JD |
884 | goto end; |
885 | } | |
886 | } else { | |
887 | ERR("Relayd ID %" PRIu64 " unknown. Can't send streams_sent.", | |
888 | net_seq_idx); | |
889 | ret = -1; | |
890 | goto end; | |
891 | } | |
892 | ||
893 | ret = 0; | |
894 | DBG("All streams sent relayd id %" PRIu64, net_seq_idx); | |
895 | ||
896 | end: | |
897 | rcu_read_unlock(); | |
898 | return ret; | |
899 | } | |
900 | ||
10a50311 JD |
901 | /* |
902 | * Find a relayd and close the stream | |
903 | */ | |
904 | void close_relayd_stream(struct lttng_consumer_stream *stream) | |
905 | { | |
906 | struct consumer_relayd_sock_pair *relayd; | |
907 | ||
908 | /* The stream is not metadata. Get relayd reference if exists. */ | |
909 | rcu_read_lock(); | |
910 | relayd = consumer_find_relayd(stream->net_seq_idx); | |
911 | if (relayd) { | |
912 | consumer_stream_relayd_close(stream, relayd); | |
913 | } | |
914 | rcu_read_unlock(); | |
915 | } | |
916 | ||
00e2e675 DG |
917 | /* |
918 | * Handle stream for relayd transmission if the stream applies for network | |
919 | * streaming where the net sequence index is set. | |
920 | * | |
921 | * Return destination file descriptor or negative value on error. | |
922 | */ | |
6197aea7 | 923 | static int write_relayd_stream_header(struct lttng_consumer_stream *stream, |
1d4dfdef DG |
924 | size_t data_size, unsigned long padding, |
925 | struct consumer_relayd_sock_pair *relayd) | |
00e2e675 DG |
926 | { |
927 | int outfd = -1, ret; | |
00e2e675 DG |
928 | struct lttcomm_relayd_data_hdr data_hdr; |
929 | ||
930 | /* Safety net */ | |
931 | assert(stream); | |
6197aea7 | 932 | assert(relayd); |
00e2e675 DG |
933 | |
934 | /* Reset data header */ | |
935 | memset(&data_hdr, 0, sizeof(data_hdr)); | |
936 | ||
00e2e675 DG |
937 | if (stream->metadata_flag) { |
938 | /* Caller MUST acquire the relayd control socket lock */ | |
939 | ret = relayd_send_metadata(&relayd->control_sock, data_size); | |
940 | if (ret < 0) { | |
941 | goto error; | |
942 | } | |
943 | ||
944 | /* Metadata are always sent on the control socket. */ | |
6151a90f | 945 | outfd = relayd->control_sock.sock.fd; |
00e2e675 DG |
946 | } else { |
947 | /* Set header with stream information */ | |
948 | data_hdr.stream_id = htobe64(stream->relayd_stream_id); | |
949 | data_hdr.data_size = htobe32(data_size); | |
1d4dfdef | 950 | data_hdr.padding_size = htobe32(padding); |
c35f9726 | 951 | |
39df6d9f DG |
952 | /* |
953 | * Note that net_seq_num below is assigned with the *current* value of | |
954 | * next_net_seq_num and only after that the next_net_seq_num will be | |
955 | * increment. This is why when issuing a command on the relayd using | |
956 | * this next value, 1 should always be substracted in order to compare | |
957 | * the last seen sequence number on the relayd side to the last sent. | |
958 | */ | |
3604f373 | 959 | data_hdr.net_seq_num = htobe64(stream->next_net_seq_num); |
00e2e675 DG |
960 | /* Other fields are zeroed previously */ |
961 | ||
962 | ret = relayd_send_data_hdr(&relayd->data_sock, &data_hdr, | |
963 | sizeof(data_hdr)); | |
964 | if (ret < 0) { | |
965 | goto error; | |
966 | } | |
967 | ||
3604f373 DG |
968 | ++stream->next_net_seq_num; |
969 | ||
00e2e675 | 970 | /* Set to go on data socket */ |
6151a90f | 971 | outfd = relayd->data_sock.sock.fd; |
00e2e675 DG |
972 | } |
973 | ||
974 | error: | |
975 | return outfd; | |
976 | } | |
977 | ||
d2956687 JG |
978 | /* |
979 | * Trigger a dump of the metadata content. Following/during the succesful | |
980 | * completion of this call, the metadata poll thread will start receiving | |
981 | * metadata packets to consume. | |
982 | * | |
983 | * The caller must hold the channel and stream locks. | |
984 | */ | |
985 | static | |
986 | int consumer_metadata_stream_dump(struct lttng_consumer_stream *stream) | |
987 | { | |
988 | int ret; | |
989 | ||
990 | ASSERT_LOCKED(stream->chan->lock); | |
991 | ASSERT_LOCKED(stream->lock); | |
992 | assert(stream->metadata_flag); | |
993 | assert(stream->chan->trace_chunk); | |
994 | ||
995 | switch (consumer_data.type) { | |
996 | case LTTNG_CONSUMER_KERNEL: | |
997 | /* | |
998 | * Reset the position of what has been read from the | |
999 | * metadata cache to 0 so we can dump it again. | |
1000 | */ | |
1001 | ret = kernctl_metadata_cache_dump(stream->wait_fd); | |
1002 | break; | |
1003 | case LTTNG_CONSUMER32_UST: | |
1004 | case LTTNG_CONSUMER64_UST: | |
1005 | /* | |
1006 | * Reset the position pushed from the metadata cache so it | |
1007 | * will write from the beginning on the next push. | |
1008 | */ | |
1009 | stream->ust_metadata_pushed = 0; | |
1010 | ret = consumer_metadata_wakeup_pipe(stream->chan); | |
1011 | break; | |
1012 | default: | |
1013 | ERR("Unknown consumer_data type"); | |
1014 | abort(); | |
1015 | } | |
1016 | if (ret < 0) { | |
1017 | ERR("Failed to dump the metadata cache"); | |
1018 | } | |
1019 | return ret; | |
1020 | } | |
1021 | ||
1022 | static | |
1023 | int lttng_consumer_channel_set_trace_chunk( | |
1024 | struct lttng_consumer_channel *channel, | |
1025 | struct lttng_trace_chunk *new_trace_chunk) | |
1026 | { | |
d2956687 | 1027 | pthread_mutex_lock(&channel->lock); |
b6921a17 JG |
1028 | if (channel->is_deleted) { |
1029 | /* | |
1030 | * The channel has been logically deleted and should no longer | |
1031 | * be used. It has released its reference to its current trace | |
1032 | * chunk and should not acquire a new one. | |
1033 | * | |
1034 | * Return success as there is nothing for the caller to do. | |
1035 | */ | |
1036 | goto end; | |
1037 | } | |
d2956687 JG |
1038 | |
1039 | /* | |
1040 | * The acquisition of the reference cannot fail (barring | |
1041 | * a severe internal error) since a reference to the published | |
1042 | * chunk is already held by the caller. | |
1043 | */ | |
1044 | if (new_trace_chunk) { | |
1045 | const bool acquired_reference = lttng_trace_chunk_get( | |
1046 | new_trace_chunk); | |
1047 | ||
1048 | assert(acquired_reference); | |
1049 | } | |
1050 | ||
1051 | lttng_trace_chunk_put(channel->trace_chunk); | |
1052 | channel->trace_chunk = new_trace_chunk; | |
d2956687 JG |
1053 | end: |
1054 | pthread_mutex_unlock(&channel->lock); | |
ce1aa6fe | 1055 | return 0; |
d2956687 JG |
1056 | } |
1057 | ||
3bd1e081 | 1058 | /* |
ffe60014 DG |
1059 | * Allocate and return a new lttng_consumer_channel object using the given key |
1060 | * to initialize the hash table node. | |
1061 | * | |
1062 | * On error, return NULL. | |
3bd1e081 | 1063 | */ |
886224ff | 1064 | struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, |
ffe60014 | 1065 | uint64_t session_id, |
d2956687 | 1066 | const uint64_t *chunk_id, |
ffe60014 DG |
1067 | const char *pathname, |
1068 | const char *name, | |
57a269f2 | 1069 | uint64_t relayd_id, |
1624d5b7 JD |
1070 | enum lttng_event_output output, |
1071 | uint64_t tracefile_size, | |
2bba9e53 | 1072 | uint64_t tracefile_count, |
1950109e | 1073 | uint64_t session_id_per_pid, |
ecc48a90 | 1074 | unsigned int monitor, |
d7ba1388 | 1075 | unsigned int live_timer_interval, |
3d071855 | 1076 | const char *root_shm_path, |
d7ba1388 | 1077 | const char *shm_path) |
3bd1e081 | 1078 | { |
d2956687 JG |
1079 | struct lttng_consumer_channel *channel = NULL; |
1080 | struct lttng_trace_chunk *trace_chunk = NULL; | |
1081 | ||
1082 | if (chunk_id) { | |
1083 | trace_chunk = lttng_trace_chunk_registry_find_chunk( | |
1084 | consumer_data.chunk_registry, session_id, | |
1085 | *chunk_id); | |
1086 | if (!trace_chunk) { | |
1087 | ERR("Failed to find trace chunk reference during creation of channel"); | |
1088 | goto end; | |
1089 | } | |
1090 | } | |
3bd1e081 | 1091 | |
276b26d1 | 1092 | channel = zmalloc(sizeof(*channel)); |
3bd1e081 | 1093 | if (channel == NULL) { |
7a57cf92 | 1094 | PERROR("malloc struct lttng_consumer_channel"); |
3bd1e081 MD |
1095 | goto end; |
1096 | } | |
ffe60014 DG |
1097 | |
1098 | channel->key = key; | |
3bd1e081 | 1099 | channel->refcount = 0; |
ffe60014 | 1100 | channel->session_id = session_id; |
1950109e | 1101 | channel->session_id_per_pid = session_id_per_pid; |
ffe60014 | 1102 | channel->relayd_id = relayd_id; |
1624d5b7 JD |
1103 | channel->tracefile_size = tracefile_size; |
1104 | channel->tracefile_count = tracefile_count; | |
2bba9e53 | 1105 | channel->monitor = monitor; |
ecc48a90 | 1106 | channel->live_timer_interval = live_timer_interval; |
a9838785 | 1107 | pthread_mutex_init(&channel->lock, NULL); |
ec6ea7d0 | 1108 | pthread_mutex_init(&channel->timer_lock, NULL); |
ffe60014 | 1109 | |
0c759fc9 DG |
1110 | switch (output) { |
1111 | case LTTNG_EVENT_SPLICE: | |
1112 | channel->output = CONSUMER_CHANNEL_SPLICE; | |
1113 | break; | |
1114 | case LTTNG_EVENT_MMAP: | |
1115 | channel->output = CONSUMER_CHANNEL_MMAP; | |
1116 | break; | |
1117 | default: | |
1118 | assert(0); | |
1119 | free(channel); | |
1120 | channel = NULL; | |
1121 | goto end; | |
1122 | } | |
1123 | ||
07b86b52 JD |
1124 | /* |
1125 | * In monitor mode, the streams associated with the channel will be put in | |
1126 | * a special list ONLY owned by this channel. So, the refcount is set to 1 | |
1127 | * here meaning that the channel itself has streams that are referenced. | |
1128 | * | |
1129 | * On a channel deletion, once the channel is no longer visible, the | |
1130 | * refcount is decremented and checked for a zero value to delete it. With | |
1131 | * streams in no monitor mode, it will now be safe to destroy the channel. | |
1132 | */ | |
1133 | if (!channel->monitor) { | |
1134 | channel->refcount = 1; | |
1135 | } | |
1136 | ||
ffe60014 DG |
1137 | strncpy(channel->pathname, pathname, sizeof(channel->pathname)); |
1138 | channel->pathname[sizeof(channel->pathname) - 1] = '\0'; | |
1139 | ||
1140 | strncpy(channel->name, name, sizeof(channel->name)); | |
1141 | channel->name[sizeof(channel->name) - 1] = '\0'; | |
1142 | ||
3d071855 MD |
1143 | if (root_shm_path) { |
1144 | strncpy(channel->root_shm_path, root_shm_path, sizeof(channel->root_shm_path)); | |
1145 | channel->root_shm_path[sizeof(channel->root_shm_path) - 1] = '\0'; | |
1146 | } | |
d7ba1388 MD |
1147 | if (shm_path) { |
1148 | strncpy(channel->shm_path, shm_path, sizeof(channel->shm_path)); | |
1149 | channel->shm_path[sizeof(channel->shm_path) - 1] = '\0'; | |
1150 | } | |
1151 | ||
d88aee68 | 1152 | lttng_ht_node_init_u64(&channel->node, channel->key); |
5c3892a6 JG |
1153 | lttng_ht_node_init_u64(&channel->channels_by_session_id_ht_node, |
1154 | channel->session_id); | |
d8ef542d MD |
1155 | |
1156 | channel->wait_fd = -1; | |
ffe60014 DG |
1157 | CDS_INIT_LIST_HEAD(&channel->streams.head); |
1158 | ||
d2956687 JG |
1159 | if (trace_chunk) { |
1160 | int ret = lttng_consumer_channel_set_trace_chunk(channel, | |
1161 | trace_chunk); | |
1162 | if (ret) { | |
1163 | goto error; | |
1164 | } | |
1165 | } | |
1166 | ||
62a7b8ed | 1167 | DBG("Allocated channel (key %" PRIu64 ")", channel->key); |
3bd1e081 | 1168 | |
3bd1e081 | 1169 | end: |
d2956687 | 1170 | lttng_trace_chunk_put(trace_chunk); |
3bd1e081 | 1171 | return channel; |
d2956687 JG |
1172 | error: |
1173 | consumer_del_channel(channel); | |
1174 | channel = NULL; | |
1175 | goto end; | |
3bd1e081 MD |
1176 | } |
1177 | ||
1178 | /* | |
1179 | * Add a channel to the global list protected by a mutex. | |
821fffb2 | 1180 | * |
b5a6470f | 1181 | * Always return 0 indicating success. |
3bd1e081 | 1182 | */ |
d8ef542d MD |
1183 | int consumer_add_channel(struct lttng_consumer_channel *channel, |
1184 | struct lttng_consumer_local_data *ctx) | |
3bd1e081 | 1185 | { |
3bd1e081 | 1186 | pthread_mutex_lock(&consumer_data.lock); |
a9838785 | 1187 | pthread_mutex_lock(&channel->lock); |
ec6ea7d0 | 1188 | pthread_mutex_lock(&channel->timer_lock); |
c77fc10a | 1189 | |
b5a6470f DG |
1190 | /* |
1191 | * This gives us a guarantee that the channel we are about to add to the | |
1192 | * channel hash table will be unique. See this function comment on the why | |
1193 | * we need to steel the channel key at this stage. | |
1194 | */ | |
1195 | steal_channel_key(channel->key); | |
c77fc10a | 1196 | |
b5a6470f | 1197 | rcu_read_lock(); |
d88aee68 | 1198 | lttng_ht_add_unique_u64(consumer_data.channel_ht, &channel->node); |
5c3892a6 JG |
1199 | lttng_ht_add_u64(consumer_data.channels_by_session_id_ht, |
1200 | &channel->channels_by_session_id_ht_node); | |
6065ceec | 1201 | rcu_read_unlock(); |
d2956687 | 1202 | channel->is_published = true; |
b5a6470f | 1203 | |
ec6ea7d0 | 1204 | pthread_mutex_unlock(&channel->timer_lock); |
a9838785 | 1205 | pthread_mutex_unlock(&channel->lock); |
3bd1e081 | 1206 | pthread_mutex_unlock(&consumer_data.lock); |
702b1ea4 | 1207 | |
b5a6470f | 1208 | if (channel->wait_fd != -1 && channel->type == CONSUMER_CHANNEL_TYPE_DATA) { |
a0cbdd2e | 1209 | notify_channel_pipe(ctx, channel, -1, CONSUMER_CHANNEL_ADD); |
d8ef542d | 1210 | } |
b5a6470f DG |
1211 | |
1212 | return 0; | |
3bd1e081 MD |
1213 | } |
1214 | ||
1215 | /* | |
1216 | * Allocate the pollfd structure and the local view of the out fds to avoid | |
1217 | * doing a lookup in the linked list and concurrency issues when writing is | |
1218 | * needed. Called with consumer_data.lock held. | |
1219 | * | |
1220 | * Returns the number of fds in the structures. | |
1221 | */ | |
ffe60014 DG |
1222 | static int update_poll_array(struct lttng_consumer_local_data *ctx, |
1223 | struct pollfd **pollfd, struct lttng_consumer_stream **local_stream, | |
9a2fcf78 | 1224 | struct lttng_ht *ht, int *nb_inactive_fd) |
3bd1e081 | 1225 | { |
3bd1e081 | 1226 | int i = 0; |
e4421fec DG |
1227 | struct lttng_ht_iter iter; |
1228 | struct lttng_consumer_stream *stream; | |
3bd1e081 | 1229 | |
ffe60014 DG |
1230 | assert(ctx); |
1231 | assert(ht); | |
1232 | assert(pollfd); | |
1233 | assert(local_stream); | |
1234 | ||
3bd1e081 | 1235 | DBG("Updating poll fd array"); |
9a2fcf78 | 1236 | *nb_inactive_fd = 0; |
481d6c57 | 1237 | rcu_read_lock(); |
43c34bc3 | 1238 | cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) { |
8994307f DG |
1239 | /* |
1240 | * Only active streams with an active end point can be added to the | |
1241 | * poll set and local stream storage of the thread. | |
1242 | * | |
1243 | * There is a potential race here for endpoint_status to be updated | |
1244 | * just after the check. However, this is OK since the stream(s) will | |
1245 | * be deleted once the thread is notified that the end point state has | |
1246 | * changed where this function will be called back again. | |
9a2fcf78 JD |
1247 | * |
1248 | * We track the number of inactive FDs because they still need to be | |
1249 | * closed by the polling thread after a wakeup on the data_pipe or | |
1250 | * metadata_pipe. | |
8994307f | 1251 | */ |
d2956687 | 1252 | if (stream->endpoint_status == CONSUMER_ENDPOINT_INACTIVE) { |
9a2fcf78 | 1253 | (*nb_inactive_fd)++; |
3bd1e081 MD |
1254 | continue; |
1255 | } | |
7972aab2 DG |
1256 | /* |
1257 | * This clobbers way too much the debug output. Uncomment that if you | |
1258 | * need it for debugging purposes. | |
7972aab2 | 1259 | */ |
e4421fec | 1260 | (*pollfd)[i].fd = stream->wait_fd; |
3bd1e081 | 1261 | (*pollfd)[i].events = POLLIN | POLLPRI; |
e4421fec | 1262 | local_stream[i] = stream; |
3bd1e081 MD |
1263 | i++; |
1264 | } | |
481d6c57 | 1265 | rcu_read_unlock(); |
3bd1e081 MD |
1266 | |
1267 | /* | |
50f8ae69 | 1268 | * Insert the consumer_data_pipe at the end of the array and don't |
3bd1e081 MD |
1269 | * increment i so nb_fd is the number of real FD. |
1270 | */ | |
acdb9057 | 1271 | (*pollfd)[i].fd = lttng_pipe_get_readfd(ctx->consumer_data_pipe); |
509bb1cf | 1272 | (*pollfd)[i].events = POLLIN | POLLPRI; |
02b3d176 DG |
1273 | |
1274 | (*pollfd)[i + 1].fd = lttng_pipe_get_readfd(ctx->consumer_wakeup_pipe); | |
1275 | (*pollfd)[i + 1].events = POLLIN | POLLPRI; | |
3bd1e081 MD |
1276 | return i; |
1277 | } | |
1278 | ||
1279 | /* | |
84382d49 MD |
1280 | * Poll on the should_quit pipe and the command socket return -1 on |
1281 | * error, 1 if should exit, 0 if data is available on the command socket | |
3bd1e081 MD |
1282 | */ |
1283 | int lttng_consumer_poll_socket(struct pollfd *consumer_sockpoll) | |
1284 | { | |
1285 | int num_rdy; | |
1286 | ||
88f2b785 | 1287 | restart: |
3bd1e081 MD |
1288 | num_rdy = poll(consumer_sockpoll, 2, -1); |
1289 | if (num_rdy == -1) { | |
88f2b785 MD |
1290 | /* |
1291 | * Restart interrupted system call. | |
1292 | */ | |
1293 | if (errno == EINTR) { | |
1294 | goto restart; | |
1295 | } | |
7a57cf92 | 1296 | PERROR("Poll error"); |
84382d49 | 1297 | return -1; |
3bd1e081 | 1298 | } |
509bb1cf | 1299 | if (consumer_sockpoll[0].revents & (POLLIN | POLLPRI)) { |
3bd1e081 | 1300 | DBG("consumer_should_quit wake up"); |
84382d49 | 1301 | return 1; |
3bd1e081 MD |
1302 | } |
1303 | return 0; | |
3bd1e081 MD |
1304 | } |
1305 | ||
1306 | /* | |
1307 | * Set the error socket. | |
1308 | */ | |
ffe60014 DG |
1309 | void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx, |
1310 | int sock) | |
3bd1e081 MD |
1311 | { |
1312 | ctx->consumer_error_socket = sock; | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | * Set the command socket path. | |
1317 | */ | |
3bd1e081 MD |
1318 | void lttng_consumer_set_command_sock_path( |
1319 | struct lttng_consumer_local_data *ctx, char *sock) | |
1320 | { | |
1321 | ctx->consumer_command_sock_path = sock; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * Send return code to the session daemon. | |
1326 | * If the socket is not defined, we return 0, it is not a fatal error | |
1327 | */ | |
ffe60014 | 1328 | int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, int cmd) |
3bd1e081 MD |
1329 | { |
1330 | if (ctx->consumer_error_socket > 0) { | |
1331 | return lttcomm_send_unix_sock(ctx->consumer_error_socket, &cmd, | |
1332 | sizeof(enum lttcomm_sessiond_command)); | |
1333 | } | |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
1338 | /* | |
228b5bf7 DG |
1339 | * Close all the tracefiles and stream fds and MUST be called when all |
1340 | * instances are destroyed i.e. when all threads were joined and are ended. | |
3bd1e081 MD |
1341 | */ |
1342 | void lttng_consumer_cleanup(void) | |
1343 | { | |
e4421fec | 1344 | struct lttng_ht_iter iter; |
ffe60014 | 1345 | struct lttng_consumer_channel *channel; |
e10aec8f | 1346 | unsigned int trace_chunks_left; |
6065ceec DG |
1347 | |
1348 | rcu_read_lock(); | |
3bd1e081 | 1349 | |
ffe60014 DG |
1350 | cds_lfht_for_each_entry(consumer_data.channel_ht->ht, &iter.iter, channel, |
1351 | node.node) { | |
702b1ea4 | 1352 | consumer_del_channel(channel); |
3bd1e081 | 1353 | } |
6065ceec DG |
1354 | |
1355 | rcu_read_unlock(); | |
d6ce1df2 | 1356 | |
d6ce1df2 | 1357 | lttng_ht_destroy(consumer_data.channel_ht); |
5c3892a6 | 1358 | lttng_ht_destroy(consumer_data.channels_by_session_id_ht); |
228b5bf7 DG |
1359 | |
1360 | cleanup_relayd_ht(); | |
1361 | ||
d8ef542d MD |
1362 | lttng_ht_destroy(consumer_data.stream_per_chan_id_ht); |
1363 | ||
228b5bf7 DG |
1364 | /* |
1365 | * This HT contains streams that are freed by either the metadata thread or | |
1366 | * the data thread so we do *nothing* on the hash table and simply destroy | |
1367 | * it. | |
1368 | */ | |
1369 | lttng_ht_destroy(consumer_data.stream_list_ht); | |
28cc88f3 | 1370 | |
e10aec8f MD |
1371 | /* |
1372 | * Trace chunks in the registry may still exist if the session | |
1373 | * daemon has encountered an internal error and could not | |
1374 | * tear down its sessions and/or trace chunks properly. | |
1375 | * | |
1376 | * Release the session daemon's implicit reference to any remaining | |
1377 | * trace chunk and print an error if any trace chunk was found. Note | |
1378 | * that there are _no_ legitimate cases for trace chunks to be left, | |
1379 | * it is a leak. However, it can happen following a crash of the | |
1380 | * session daemon and not emptying the registry would cause an assertion | |
1381 | * to hit. | |
1382 | */ | |
1383 | trace_chunks_left = lttng_trace_chunk_registry_put_each_chunk( | |
1384 | consumer_data.chunk_registry); | |
1385 | if (trace_chunks_left) { | |
1386 | ERR("%u trace chunks are leaked by lttng-consumerd. " | |
1387 | "This can be caused by an internal error of the session daemon.", | |
1388 | trace_chunks_left); | |
1389 | } | |
1390 | /* Run all callbacks freeing each chunk. */ | |
1391 | rcu_barrier(); | |
28cc88f3 | 1392 | lttng_trace_chunk_registry_destroy(consumer_data.chunk_registry); |
3bd1e081 MD |
1393 | } |
1394 | ||
1395 | /* | |
1396 | * Called from signal handler. | |
1397 | */ | |
1398 | void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx) | |
1399 | { | |
6cd525e8 MD |
1400 | ssize_t ret; |
1401 | ||
10211f5c | 1402 | CMM_STORE_SHARED(consumer_quit, 1); |
6cd525e8 MD |
1403 | ret = lttng_write(ctx->consumer_should_quit[1], "4", 1); |
1404 | if (ret < 1) { | |
7a57cf92 | 1405 | PERROR("write consumer quit"); |
3bd1e081 | 1406 | } |
ab1027f4 DG |
1407 | |
1408 | DBG("Consumer flag that it should quit"); | |
3bd1e081 MD |
1409 | } |
1410 | ||
5199ffc4 JG |
1411 | |
1412 | /* | |
1413 | * Flush pending writes to trace output disk file. | |
1414 | */ | |
1415 | static | |
00e2e675 DG |
1416 | void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream, |
1417 | off_t orig_offset) | |
3bd1e081 | 1418 | { |
c7a78aab | 1419 | int ret; |
3bd1e081 MD |
1420 | int outfd = stream->out_fd; |
1421 | ||
1422 | /* | |
1423 | * This does a blocking write-and-wait on any page that belongs to the | |
1424 | * subbuffer prior to the one we just wrote. | |
1425 | * Don't care about error values, as these are just hints and ways to | |
1426 | * limit the amount of page cache used. | |
1427 | */ | |
ffe60014 | 1428 | if (orig_offset < stream->max_sb_size) { |
3bd1e081 MD |
1429 | return; |
1430 | } | |
ffe60014 DG |
1431 | lttng_sync_file_range(outfd, orig_offset - stream->max_sb_size, |
1432 | stream->max_sb_size, | |
3bd1e081 MD |
1433 | SYNC_FILE_RANGE_WAIT_BEFORE |
1434 | | SYNC_FILE_RANGE_WRITE | |
1435 | | SYNC_FILE_RANGE_WAIT_AFTER); | |
1436 | /* | |
1437 | * Give hints to the kernel about how we access the file: | |
1438 | * POSIX_FADV_DONTNEED : we won't re-access data in a near future after | |
1439 | * we write it. | |
1440 | * | |
1441 | * We need to call fadvise again after the file grows because the | |
1442 | * kernel does not seem to apply fadvise to non-existing parts of the | |
1443 | * file. | |
1444 | * | |
1445 | * Call fadvise _after_ having waited for the page writeback to | |
1446 | * complete because the dirty page writeback semantic is not well | |
1447 | * defined. So it can be expected to lead to lower throughput in | |
1448 | * streaming. | |
1449 | */ | |
c7a78aab | 1450 | ret = posix_fadvise(outfd, orig_offset - stream->max_sb_size, |
ffe60014 | 1451 | stream->max_sb_size, POSIX_FADV_DONTNEED); |
a0d0e127 | 1452 | if (ret && ret != -ENOSYS) { |
a74a5f4a JG |
1453 | errno = ret; |
1454 | PERROR("posix_fadvise on fd %i", outfd); | |
c7a78aab | 1455 | } |
3bd1e081 MD |
1456 | } |
1457 | ||
1458 | /* | |
1459 | * Initialise the necessary environnement : | |
1460 | * - create a new context | |
1461 | * - create the poll_pipe | |
1462 | * - create the should_quit pipe (for signal handler) | |
1463 | * - create the thread pipe (for splice) | |
1464 | * | |
1465 | * Takes a function pointer as argument, this function is called when data is | |
1466 | * available on a buffer. This function is responsible to do the | |
1467 | * kernctl_get_next_subbuf, read the data with mmap or splice depending on the | |
1468 | * buffer configuration and then kernctl_put_next_subbuf at the end. | |
1469 | * | |
1470 | * Returns a pointer to the new context or NULL on error. | |
1471 | */ | |
1472 | struct lttng_consumer_local_data *lttng_consumer_create( | |
1473 | enum lttng_consumer_type type, | |
4078b776 | 1474 | ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream, |
d41f73b7 | 1475 | struct lttng_consumer_local_data *ctx), |
3bd1e081 MD |
1476 | int (*recv_channel)(struct lttng_consumer_channel *channel), |
1477 | int (*recv_stream)(struct lttng_consumer_stream *stream), | |
30319bcb | 1478 | int (*update_stream)(uint64_t stream_key, uint32_t state)) |
3bd1e081 | 1479 | { |
d8ef542d | 1480 | int ret; |
3bd1e081 MD |
1481 | struct lttng_consumer_local_data *ctx; |
1482 | ||
1483 | assert(consumer_data.type == LTTNG_CONSUMER_UNKNOWN || | |
1484 | consumer_data.type == type); | |
1485 | consumer_data.type = type; | |
1486 | ||
effcf122 | 1487 | ctx = zmalloc(sizeof(struct lttng_consumer_local_data)); |
3bd1e081 | 1488 | if (ctx == NULL) { |
7a57cf92 | 1489 | PERROR("allocating context"); |
3bd1e081 MD |
1490 | goto error; |
1491 | } | |
1492 | ||
1493 | ctx->consumer_error_socket = -1; | |
331744e3 | 1494 | ctx->consumer_metadata_socket = -1; |
75d83e50 | 1495 | pthread_mutex_init(&ctx->metadata_socket_lock, NULL); |
3bd1e081 MD |
1496 | /* assign the callbacks */ |
1497 | ctx->on_buffer_ready = buffer_ready; | |
1498 | ctx->on_recv_channel = recv_channel; | |
1499 | ctx->on_recv_stream = recv_stream; | |
1500 | ctx->on_update_stream = update_stream; | |
1501 | ||
acdb9057 DG |
1502 | ctx->consumer_data_pipe = lttng_pipe_open(0); |
1503 | if (!ctx->consumer_data_pipe) { | |
3bd1e081 MD |
1504 | goto error_poll_pipe; |
1505 | } | |
1506 | ||
02b3d176 DG |
1507 | ctx->consumer_wakeup_pipe = lttng_pipe_open(0); |
1508 | if (!ctx->consumer_wakeup_pipe) { | |
1509 | goto error_wakeup_pipe; | |
1510 | } | |
1511 | ||
3bd1e081 MD |
1512 | ret = pipe(ctx->consumer_should_quit); |
1513 | if (ret < 0) { | |
7a57cf92 | 1514 | PERROR("Error creating recv pipe"); |
3bd1e081 MD |
1515 | goto error_quit_pipe; |
1516 | } | |
1517 | ||
d8ef542d MD |
1518 | ret = pipe(ctx->consumer_channel_pipe); |
1519 | if (ret < 0) { | |
1520 | PERROR("Error creating channel pipe"); | |
1521 | goto error_channel_pipe; | |
1522 | } | |
1523 | ||
13886d2d DG |
1524 | ctx->consumer_metadata_pipe = lttng_pipe_open(0); |
1525 | if (!ctx->consumer_metadata_pipe) { | |
fb3a43a9 DG |
1526 | goto error_metadata_pipe; |
1527 | } | |
3bd1e081 | 1528 | |
e9404c27 JG |
1529 | ctx->channel_monitor_pipe = -1; |
1530 | ||
fb3a43a9 | 1531 | return ctx; |
3bd1e081 | 1532 | |
fb3a43a9 | 1533 | error_metadata_pipe: |
d8ef542d MD |
1534 | utils_close_pipe(ctx->consumer_channel_pipe); |
1535 | error_channel_pipe: | |
d8ef542d | 1536 | utils_close_pipe(ctx->consumer_should_quit); |
3bd1e081 | 1537 | error_quit_pipe: |
02b3d176 DG |
1538 | lttng_pipe_destroy(ctx->consumer_wakeup_pipe); |
1539 | error_wakeup_pipe: | |
acdb9057 | 1540 | lttng_pipe_destroy(ctx->consumer_data_pipe); |
3bd1e081 MD |
1541 | error_poll_pipe: |
1542 | free(ctx); | |
1543 | error: | |
1544 | return NULL; | |
1545 | } | |
1546 | ||
282dadbc MD |
1547 | /* |
1548 | * Iterate over all streams of the hashtable and free them properly. | |
1549 | */ | |
1550 | static void destroy_data_stream_ht(struct lttng_ht *ht) | |
1551 | { | |
1552 | struct lttng_ht_iter iter; | |
1553 | struct lttng_consumer_stream *stream; | |
1554 | ||
1555 | if (ht == NULL) { | |
1556 | return; | |
1557 | } | |
1558 | ||
1559 | rcu_read_lock(); | |
1560 | cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) { | |
1561 | /* | |
1562 | * Ignore return value since we are currently cleaning up so any error | |
1563 | * can't be handled. | |
1564 | */ | |
1565 | (void) consumer_del_stream(stream, ht); | |
1566 | } | |
1567 | rcu_read_unlock(); | |
1568 | ||
1569 | lttng_ht_destroy(ht); | |
1570 | } | |
1571 | ||
1572 | /* | |
1573 | * Iterate over all streams of the metadata hashtable and free them | |
1574 | * properly. | |
1575 | */ | |
1576 | static void destroy_metadata_stream_ht(struct lttng_ht *ht) | |
1577 | { | |
1578 | struct lttng_ht_iter iter; | |
1579 | struct lttng_consumer_stream *stream; | |
1580 | ||
1581 | if (ht == NULL) { | |
1582 | return; | |
1583 | } | |
1584 | ||
1585 | rcu_read_lock(); | |
1586 | cds_lfht_for_each_entry(ht->ht, &iter.iter, stream, node.node) { | |
1587 | /* | |
1588 | * Ignore return value since we are currently cleaning up so any error | |
1589 | * can't be handled. | |
1590 | */ | |
1591 | (void) consumer_del_metadata_stream(stream, ht); | |
1592 | } | |
1593 | rcu_read_unlock(); | |
1594 | ||
1595 | lttng_ht_destroy(ht); | |
1596 | } | |
1597 | ||
3bd1e081 MD |
1598 | /* |
1599 | * Close all fds associated with the instance and free the context. | |
1600 | */ | |
1601 | void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx) | |
1602 | { | |
4c462e79 MD |
1603 | int ret; |
1604 | ||
ab1027f4 DG |
1605 | DBG("Consumer destroying it. Closing everything."); |
1606 | ||
4f2e75b9 DG |
1607 | if (!ctx) { |
1608 | return; | |
1609 | } | |
1610 | ||
282dadbc MD |
1611 | destroy_data_stream_ht(data_ht); |
1612 | destroy_metadata_stream_ht(metadata_ht); | |
1613 | ||
4c462e79 MD |
1614 | ret = close(ctx->consumer_error_socket); |
1615 | if (ret) { | |
1616 | PERROR("close"); | |
1617 | } | |
331744e3 JD |
1618 | ret = close(ctx->consumer_metadata_socket); |
1619 | if (ret) { | |
1620 | PERROR("close"); | |
1621 | } | |
d8ef542d | 1622 | utils_close_pipe(ctx->consumer_channel_pipe); |
acdb9057 | 1623 | lttng_pipe_destroy(ctx->consumer_data_pipe); |
13886d2d | 1624 | lttng_pipe_destroy(ctx->consumer_metadata_pipe); |
02b3d176 | 1625 | lttng_pipe_destroy(ctx->consumer_wakeup_pipe); |
d8ef542d | 1626 | utils_close_pipe(ctx->consumer_should_quit); |
fb3a43a9 | 1627 | |
3bd1e081 MD |
1628 | unlink(ctx->consumer_command_sock_path); |
1629 | free(ctx); | |
1630 | } | |
1631 | ||
6197aea7 DG |
1632 | /* |
1633 | * Write the metadata stream id on the specified file descriptor. | |
1634 | */ | |
1635 | static int write_relayd_metadata_id(int fd, | |
1636 | struct lttng_consumer_stream *stream, | |
239f61af | 1637 | unsigned long padding) |
6197aea7 | 1638 | { |
6cd525e8 | 1639 | ssize_t ret; |
1d4dfdef | 1640 | struct lttcomm_relayd_metadata_payload hdr; |
6197aea7 | 1641 | |
1d4dfdef DG |
1642 | hdr.stream_id = htobe64(stream->relayd_stream_id); |
1643 | hdr.padding_size = htobe32(padding); | |
6cd525e8 MD |
1644 | ret = lttng_write(fd, (void *) &hdr, sizeof(hdr)); |
1645 | if (ret < sizeof(hdr)) { | |
d7b75ec8 | 1646 | /* |
6f04ed72 | 1647 | * This error means that the fd's end is closed so ignore the PERROR |
d7b75ec8 DG |
1648 | * not to clubber the error output since this can happen in a normal |
1649 | * code path. | |
1650 | */ | |
1651 | if (errno != EPIPE) { | |
1652 | PERROR("write metadata stream id"); | |
1653 | } | |
1654 | DBG3("Consumer failed to write relayd metadata id (errno: %d)", errno); | |
534d2592 DG |
1655 | /* |
1656 | * Set ret to a negative value because if ret != sizeof(hdr), we don't | |
1657 | * handle writting the missing part so report that as an error and | |
1658 | * don't lie to the caller. | |
1659 | */ | |
1660 | ret = -1; | |
6197aea7 DG |
1661 | goto end; |
1662 | } | |
1d4dfdef DG |
1663 | DBG("Metadata stream id %" PRIu64 " with padding %lu written before data", |
1664 | stream->relayd_stream_id, padding); | |
6197aea7 DG |
1665 | |
1666 | end: | |
6cd525e8 | 1667 | return (int) ret; |
6197aea7 DG |
1668 | } |
1669 | ||
3bd1e081 | 1670 | /* |
09e26845 DG |
1671 | * Mmap the ring buffer, read it and write the data to the tracefile. This is a |
1672 | * core function for writing trace buffers to either the local filesystem or | |
1673 | * the network. | |
1674 | * | |
d2956687 | 1675 | * It must be called with the stream and the channel lock held. |
79d4ffb7 | 1676 | * |
09e26845 | 1677 | * Careful review MUST be put if any changes occur! |
3bd1e081 MD |
1678 | * |
1679 | * Returns the number of bytes written | |
1680 | */ | |
4078b776 | 1681 | ssize_t lttng_consumer_on_read_subbuffer_mmap( |
3bd1e081 | 1682 | struct lttng_consumer_local_data *ctx, |
1d4dfdef | 1683 | struct lttng_consumer_stream *stream, unsigned long len, |
309167d2 | 1684 | unsigned long padding, |
50adc264 | 1685 | struct ctf_packet_index *index) |
3bd1e081 | 1686 | { |
f02e1e8a | 1687 | unsigned long mmap_offset; |
ffe60014 | 1688 | void *mmap_base; |
994ab360 | 1689 | ssize_t ret = 0; |
f02e1e8a DG |
1690 | off_t orig_offset = stream->out_fd_offset; |
1691 | /* Default is on the disk */ | |
1692 | int outfd = stream->out_fd; | |
f02e1e8a | 1693 | struct consumer_relayd_sock_pair *relayd = NULL; |
8994307f | 1694 | unsigned int relayd_hang_up = 0; |
f02e1e8a DG |
1695 | |
1696 | /* RCU lock for the relayd pointer */ | |
1697 | rcu_read_lock(); | |
7fd975c5 | 1698 | assert(stream->net_seq_idx != (uint64_t) -1ULL || |
948411cd | 1699 | stream->trace_chunk); |
d2956687 | 1700 | |
f02e1e8a | 1701 | /* Flag that the current stream if set for network streaming. */ |
da009f2c | 1702 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
f02e1e8a DG |
1703 | relayd = consumer_find_relayd(stream->net_seq_idx); |
1704 | if (relayd == NULL) { | |
56591bac | 1705 | ret = -EPIPE; |
f02e1e8a DG |
1706 | goto end; |
1707 | } | |
1708 | } | |
1709 | ||
1710 | /* get the offset inside the fd to mmap */ | |
3bd1e081 MD |
1711 | switch (consumer_data.type) { |
1712 | case LTTNG_CONSUMER_KERNEL: | |
ffe60014 | 1713 | mmap_base = stream->mmap_base; |
f02e1e8a | 1714 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); |
994ab360 | 1715 | if (ret < 0) { |
56591bac | 1716 | PERROR("tracer ctl get_mmap_read_offset"); |
56591bac MD |
1717 | goto end; |
1718 | } | |
f02e1e8a | 1719 | break; |
7753dea8 MD |
1720 | case LTTNG_CONSUMER32_UST: |
1721 | case LTTNG_CONSUMER64_UST: | |
ffe60014 DG |
1722 | mmap_base = lttng_ustctl_get_mmap_base(stream); |
1723 | if (!mmap_base) { | |
1724 | ERR("read mmap get mmap base for stream %s", stream->name); | |
994ab360 | 1725 | ret = -EPERM; |
ffe60014 DG |
1726 | goto end; |
1727 | } | |
1728 | ret = lttng_ustctl_get_mmap_read_offset(stream, &mmap_offset); | |
56591bac MD |
1729 | if (ret != 0) { |
1730 | PERROR("tracer ctl get_mmap_read_offset"); | |
994ab360 | 1731 | ret = -EINVAL; |
56591bac MD |
1732 | goto end; |
1733 | } | |
f02e1e8a | 1734 | break; |
3bd1e081 MD |
1735 | default: |
1736 | ERR("Unknown consumer_data type"); | |
1737 | assert(0); | |
1738 | } | |
b9182dd9 | 1739 | |
f02e1e8a DG |
1740 | /* Handle stream on the relayd if the output is on the network */ |
1741 | if (relayd) { | |
1742 | unsigned long netlen = len; | |
1743 | ||
1744 | /* | |
1745 | * Lock the control socket for the complete duration of the function | |
1746 | * since from this point on we will use the socket. | |
1747 | */ | |
1748 | if (stream->metadata_flag) { | |
1749 | /* Metadata requires the control socket. */ | |
1750 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
93ec662e JD |
1751 | if (stream->reset_metadata_flag) { |
1752 | ret = relayd_reset_metadata(&relayd->control_sock, | |
1753 | stream->relayd_stream_id, | |
1754 | stream->metadata_version); | |
1755 | if (ret < 0) { | |
1756 | relayd_hang_up = 1; | |
1757 | goto write_error; | |
1758 | } | |
1759 | stream->reset_metadata_flag = 0; | |
1760 | } | |
1d4dfdef | 1761 | netlen += sizeof(struct lttcomm_relayd_metadata_payload); |
f02e1e8a DG |
1762 | } |
1763 | ||
1d4dfdef | 1764 | ret = write_relayd_stream_header(stream, netlen, padding, relayd); |
994ab360 DG |
1765 | if (ret < 0) { |
1766 | relayd_hang_up = 1; | |
1767 | goto write_error; | |
1768 | } | |
1769 | /* Use the returned socket. */ | |
1770 | outfd = ret; | |
f02e1e8a | 1771 | |
994ab360 DG |
1772 | /* Write metadata stream id before payload */ |
1773 | if (stream->metadata_flag) { | |
239f61af | 1774 | ret = write_relayd_metadata_id(outfd, stream, padding); |
994ab360 | 1775 | if (ret < 0) { |
8994307f DG |
1776 | relayd_hang_up = 1; |
1777 | goto write_error; | |
1778 | } | |
f02e1e8a | 1779 | } |
1d4dfdef DG |
1780 | } else { |
1781 | /* No streaming, we have to set the len with the full padding */ | |
1782 | len += padding; | |
1624d5b7 | 1783 | |
93ec662e JD |
1784 | if (stream->metadata_flag && stream->reset_metadata_flag) { |
1785 | ret = utils_truncate_stream_file(stream->out_fd, 0); | |
1786 | if (ret < 0) { | |
1787 | ERR("Reset metadata file"); | |
1788 | goto end; | |
1789 | } | |
1790 | stream->reset_metadata_flag = 0; | |
1791 | } | |
1792 | ||
1624d5b7 JD |
1793 | /* |
1794 | * Check if we need to change the tracefile before writing the packet. | |
1795 | */ | |
1796 | if (stream->chan->tracefile_size > 0 && | |
1797 | (stream->tracefile_size_current + len) > | |
1798 | stream->chan->tracefile_size) { | |
d2956687 JG |
1799 | ret = consumer_stream_rotate_output_files(stream); |
1800 | if (ret) { | |
1624d5b7 JD |
1801 | goto end; |
1802 | } | |
309167d2 | 1803 | outfd = stream->out_fd; |
a1ae300f | 1804 | orig_offset = 0; |
1624d5b7 JD |
1805 | } |
1806 | stream->tracefile_size_current += len; | |
309167d2 JD |
1807 | if (index) { |
1808 | index->offset = htobe64(stream->out_fd_offset); | |
1809 | } | |
f02e1e8a DG |
1810 | } |
1811 | ||
d02b8372 DG |
1812 | /* |
1813 | * This call guarantee that len or less is returned. It's impossible to | |
1814 | * receive a ret value that is bigger than len. | |
1815 | */ | |
1816 | ret = lttng_write(outfd, mmap_base + mmap_offset, len); | |
1817 | DBG("Consumer mmap write() ret %zd (len %lu)", ret, len); | |
1818 | if (ret < 0 || ((size_t) ret != len)) { | |
1819 | /* | |
1820 | * Report error to caller if nothing was written else at least send the | |
1821 | * amount written. | |
1822 | */ | |
1823 | if (ret < 0) { | |
994ab360 | 1824 | ret = -errno; |
f02e1e8a | 1825 | } |
994ab360 | 1826 | relayd_hang_up = 1; |
f02e1e8a | 1827 | |
d02b8372 | 1828 | /* Socket operation failed. We consider the relayd dead */ |
fcf0f774 | 1829 | if (errno == EPIPE) { |
d02b8372 DG |
1830 | /* |
1831 | * This is possible if the fd is closed on the other side | |
1832 | * (outfd) or any write problem. It can be verbose a bit for a | |
1833 | * normal execution if for instance the relayd is stopped | |
1834 | * abruptly. This can happen so set this to a DBG statement. | |
1835 | */ | |
1836 | DBG("Consumer mmap write detected relayd hang up"); | |
994ab360 DG |
1837 | } else { |
1838 | /* Unhandled error, print it and stop function right now. */ | |
1839 | PERROR("Error in write mmap (ret %zd != len %lu)", ret, len); | |
f02e1e8a | 1840 | } |
994ab360 | 1841 | goto write_error; |
d02b8372 DG |
1842 | } |
1843 | stream->output_written += ret; | |
d02b8372 DG |
1844 | |
1845 | /* This call is useless on a socket so better save a syscall. */ | |
1846 | if (!relayd) { | |
1847 | /* This won't block, but will start writeout asynchronously */ | |
1848 | lttng_sync_file_range(outfd, stream->out_fd_offset, len, | |
1849 | SYNC_FILE_RANGE_WRITE); | |
1850 | stream->out_fd_offset += len; | |
f5dbe415 | 1851 | lttng_consumer_sync_trace_file(stream, orig_offset); |
f02e1e8a | 1852 | } |
f02e1e8a | 1853 | |
8994307f DG |
1854 | write_error: |
1855 | /* | |
1856 | * This is a special case that the relayd has closed its socket. Let's | |
1857 | * cleanup the relayd object and all associated streams. | |
1858 | */ | |
1859 | if (relayd && relayd_hang_up) { | |
9276e5c8 JR |
1860 | ERR("Relayd hangup. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
1861 | lttng_consumer_cleanup_relayd(relayd); | |
8994307f DG |
1862 | } |
1863 | ||
f02e1e8a DG |
1864 | end: |
1865 | /* Unlock only if ctrl socket used */ | |
1866 | if (relayd && stream->metadata_flag) { | |
1867 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
1868 | } | |
1869 | ||
1870 | rcu_read_unlock(); | |
994ab360 | 1871 | return ret; |
3bd1e081 MD |
1872 | } |
1873 | ||
1874 | /* | |
1875 | * Splice the data from the ring buffer to the tracefile. | |
1876 | * | |
79d4ffb7 DG |
1877 | * It must be called with the stream lock held. |
1878 | * | |
3bd1e081 MD |
1879 | * Returns the number of bytes spliced. |
1880 | */ | |
4078b776 | 1881 | ssize_t lttng_consumer_on_read_subbuffer_splice( |
3bd1e081 | 1882 | struct lttng_consumer_local_data *ctx, |
1d4dfdef | 1883 | struct lttng_consumer_stream *stream, unsigned long len, |
309167d2 | 1884 | unsigned long padding, |
50adc264 | 1885 | struct ctf_packet_index *index) |
3bd1e081 | 1886 | { |
f02e1e8a DG |
1887 | ssize_t ret = 0, written = 0, ret_splice = 0; |
1888 | loff_t offset = 0; | |
1889 | off_t orig_offset = stream->out_fd_offset; | |
1890 | int fd = stream->wait_fd; | |
1891 | /* Default is on the disk */ | |
1892 | int outfd = stream->out_fd; | |
f02e1e8a | 1893 | struct consumer_relayd_sock_pair *relayd = NULL; |
fb3a43a9 | 1894 | int *splice_pipe; |
8994307f | 1895 | unsigned int relayd_hang_up = 0; |
f02e1e8a | 1896 | |
3bd1e081 MD |
1897 | switch (consumer_data.type) { |
1898 | case LTTNG_CONSUMER_KERNEL: | |
f02e1e8a | 1899 | break; |
7753dea8 MD |
1900 | case LTTNG_CONSUMER32_UST: |
1901 | case LTTNG_CONSUMER64_UST: | |
f02e1e8a | 1902 | /* Not supported for user space tracing */ |
3bd1e081 MD |
1903 | return -ENOSYS; |
1904 | default: | |
1905 | ERR("Unknown consumer_data type"); | |
1906 | assert(0); | |
3bd1e081 MD |
1907 | } |
1908 | ||
f02e1e8a DG |
1909 | /* RCU lock for the relayd pointer */ |
1910 | rcu_read_lock(); | |
1911 | ||
1912 | /* Flag that the current stream if set for network streaming. */ | |
da009f2c | 1913 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
f02e1e8a DG |
1914 | relayd = consumer_find_relayd(stream->net_seq_idx); |
1915 | if (relayd == NULL) { | |
ad0b0d23 | 1916 | written = -ret; |
f02e1e8a DG |
1917 | goto end; |
1918 | } | |
1919 | } | |
a2361a61 | 1920 | splice_pipe = stream->splice_pipe; |
fb3a43a9 | 1921 | |
f02e1e8a | 1922 | /* Write metadata stream id before payload */ |
1d4dfdef | 1923 | if (relayd) { |
ad0b0d23 | 1924 | unsigned long total_len = len; |
f02e1e8a | 1925 | |
1d4dfdef DG |
1926 | if (stream->metadata_flag) { |
1927 | /* | |
1928 | * Lock the control socket for the complete duration of the function | |
1929 | * since from this point on we will use the socket. | |
1930 | */ | |
1931 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
1932 | ||
93ec662e JD |
1933 | if (stream->reset_metadata_flag) { |
1934 | ret = relayd_reset_metadata(&relayd->control_sock, | |
1935 | stream->relayd_stream_id, | |
1936 | stream->metadata_version); | |
1937 | if (ret < 0) { | |
1938 | relayd_hang_up = 1; | |
1939 | goto write_error; | |
1940 | } | |
1941 | stream->reset_metadata_flag = 0; | |
1942 | } | |
239f61af | 1943 | ret = write_relayd_metadata_id(splice_pipe[1], stream, |
1d4dfdef DG |
1944 | padding); |
1945 | if (ret < 0) { | |
1946 | written = ret; | |
ad0b0d23 DG |
1947 | relayd_hang_up = 1; |
1948 | goto write_error; | |
1d4dfdef DG |
1949 | } |
1950 | ||
1951 | total_len += sizeof(struct lttcomm_relayd_metadata_payload); | |
1952 | } | |
1953 | ||
1954 | ret = write_relayd_stream_header(stream, total_len, padding, relayd); | |
ad0b0d23 DG |
1955 | if (ret < 0) { |
1956 | written = ret; | |
1957 | relayd_hang_up = 1; | |
1958 | goto write_error; | |
f02e1e8a | 1959 | } |
ad0b0d23 DG |
1960 | /* Use the returned socket. */ |
1961 | outfd = ret; | |
1d4dfdef DG |
1962 | } else { |
1963 | /* No streaming, we have to set the len with the full padding */ | |
1964 | len += padding; | |
1624d5b7 | 1965 | |
93ec662e JD |
1966 | if (stream->metadata_flag && stream->reset_metadata_flag) { |
1967 | ret = utils_truncate_stream_file(stream->out_fd, 0); | |
1968 | if (ret < 0) { | |
1969 | ERR("Reset metadata file"); | |
1970 | goto end; | |
1971 | } | |
1972 | stream->reset_metadata_flag = 0; | |
1973 | } | |
1624d5b7 JD |
1974 | /* |
1975 | * Check if we need to change the tracefile before writing the packet. | |
1976 | */ | |
1977 | if (stream->chan->tracefile_size > 0 && | |
1978 | (stream->tracefile_size_current + len) > | |
1979 | stream->chan->tracefile_size) { | |
d2956687 | 1980 | ret = consumer_stream_rotate_output_files(stream); |
1624d5b7 | 1981 | if (ret < 0) { |
ad0b0d23 | 1982 | written = ret; |
1624d5b7 JD |
1983 | goto end; |
1984 | } | |
309167d2 | 1985 | outfd = stream->out_fd; |
a1ae300f | 1986 | orig_offset = 0; |
1624d5b7 JD |
1987 | } |
1988 | stream->tracefile_size_current += len; | |
309167d2 | 1989 | index->offset = htobe64(stream->out_fd_offset); |
f02e1e8a DG |
1990 | } |
1991 | ||
1992 | while (len > 0) { | |
1d4dfdef DG |
1993 | DBG("splice chan to pipe offset %lu of len %lu (fd : %d, pipe: %d)", |
1994 | (unsigned long)offset, len, fd, splice_pipe[1]); | |
fb3a43a9 | 1995 | ret_splice = splice(fd, &offset, splice_pipe[1], NULL, len, |
f02e1e8a DG |
1996 | SPLICE_F_MOVE | SPLICE_F_MORE); |
1997 | DBG("splice chan to pipe, ret %zd", ret_splice); | |
1998 | if (ret_splice < 0) { | |
d02b8372 | 1999 | ret = errno; |
ad0b0d23 | 2000 | written = -ret; |
d02b8372 | 2001 | PERROR("Error in relay splice"); |
f02e1e8a DG |
2002 | goto splice_error; |
2003 | } | |
2004 | ||
2005 | /* Handle stream on the relayd if the output is on the network */ | |
ad0b0d23 DG |
2006 | if (relayd && stream->metadata_flag) { |
2007 | size_t metadata_payload_size = | |
2008 | sizeof(struct lttcomm_relayd_metadata_payload); | |
2009 | ||
2010 | /* Update counter to fit the spliced data */ | |
2011 | ret_splice += metadata_payload_size; | |
2012 | len += metadata_payload_size; | |
2013 | /* | |
2014 | * We do this so the return value can match the len passed as | |
2015 | * argument to this function. | |
2016 | */ | |
2017 | written -= metadata_payload_size; | |
f02e1e8a DG |
2018 | } |
2019 | ||
2020 | /* Splice data out */ | |
fb3a43a9 | 2021 | ret_splice = splice(splice_pipe[0], NULL, outfd, NULL, |
f02e1e8a | 2022 | ret_splice, SPLICE_F_MOVE | SPLICE_F_MORE); |
a2361a61 JD |
2023 | DBG("Consumer splice pipe to file (out_fd: %d), ret %zd", |
2024 | outfd, ret_splice); | |
f02e1e8a | 2025 | if (ret_splice < 0) { |
d02b8372 | 2026 | ret = errno; |
ad0b0d23 DG |
2027 | written = -ret; |
2028 | relayd_hang_up = 1; | |
2029 | goto write_error; | |
f02e1e8a | 2030 | } else if (ret_splice > len) { |
d02b8372 DG |
2031 | /* |
2032 | * We don't expect this code path to be executed but you never know | |
2033 | * so this is an extra protection agains a buggy splice(). | |
2034 | */ | |
f02e1e8a | 2035 | ret = errno; |
ad0b0d23 | 2036 | written += ret_splice; |
d02b8372 DG |
2037 | PERROR("Wrote more data than requested %zd (len: %lu)", ret_splice, |
2038 | len); | |
f02e1e8a | 2039 | goto splice_error; |
d02b8372 DG |
2040 | } else { |
2041 | /* All good, update current len and continue. */ | |
2042 | len -= ret_splice; | |
f02e1e8a | 2043 | } |
f02e1e8a DG |
2044 | |
2045 | /* This call is useless on a socket so better save a syscall. */ | |
2046 | if (!relayd) { | |
2047 | /* This won't block, but will start writeout asynchronously */ | |
2048 | lttng_sync_file_range(outfd, stream->out_fd_offset, ret_splice, | |
2049 | SYNC_FILE_RANGE_WRITE); | |
2050 | stream->out_fd_offset += ret_splice; | |
2051 | } | |
e5d1a9b3 | 2052 | stream->output_written += ret_splice; |
f02e1e8a DG |
2053 | written += ret_splice; |
2054 | } | |
f5dbe415 JG |
2055 | if (!relayd) { |
2056 | lttng_consumer_sync_trace_file(stream, orig_offset); | |
2057 | } | |
f02e1e8a DG |
2058 | goto end; |
2059 | ||
8994307f DG |
2060 | write_error: |
2061 | /* | |
2062 | * This is a special case that the relayd has closed its socket. Let's | |
2063 | * cleanup the relayd object and all associated streams. | |
2064 | */ | |
2065 | if (relayd && relayd_hang_up) { | |
9276e5c8 JR |
2066 | ERR("Relayd hangup. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
2067 | lttng_consumer_cleanup_relayd(relayd); | |
8994307f DG |
2068 | /* Skip splice error so the consumer does not fail */ |
2069 | goto end; | |
2070 | } | |
2071 | ||
f02e1e8a DG |
2072 | splice_error: |
2073 | /* send the appropriate error description to sessiond */ | |
2074 | switch (ret) { | |
f02e1e8a | 2075 | case EINVAL: |
f73fabfd | 2076 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_EINVAL); |
f02e1e8a DG |
2077 | break; |
2078 | case ENOMEM: | |
f73fabfd | 2079 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_ENOMEM); |
f02e1e8a DG |
2080 | break; |
2081 | case ESPIPE: | |
f73fabfd | 2082 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_ESPIPE); |
f02e1e8a DG |
2083 | break; |
2084 | } | |
2085 | ||
2086 | end: | |
2087 | if (relayd && stream->metadata_flag) { | |
2088 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
2089 | } | |
2090 | ||
2091 | rcu_read_unlock(); | |
2092 | return written; | |
3bd1e081 MD |
2093 | } |
2094 | ||
15055ce5 JD |
2095 | /* |
2096 | * Sample the snapshot positions for a specific fd | |
2097 | * | |
2098 | * Returns 0 on success, < 0 on error | |
2099 | */ | |
2100 | int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream *stream) | |
2101 | { | |
2102 | switch (consumer_data.type) { | |
2103 | case LTTNG_CONSUMER_KERNEL: | |
2104 | return lttng_kconsumer_sample_snapshot_positions(stream); | |
2105 | case LTTNG_CONSUMER32_UST: | |
2106 | case LTTNG_CONSUMER64_UST: | |
2107 | return lttng_ustconsumer_sample_snapshot_positions(stream); | |
2108 | default: | |
2109 | ERR("Unknown consumer_data type"); | |
2110 | assert(0); | |
2111 | return -ENOSYS; | |
2112 | } | |
2113 | } | |
3bd1e081 MD |
2114 | /* |
2115 | * Take a snapshot for a specific fd | |
2116 | * | |
2117 | * Returns 0 on success, < 0 on error | |
2118 | */ | |
ffe60014 | 2119 | int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
2120 | { |
2121 | switch (consumer_data.type) { | |
2122 | case LTTNG_CONSUMER_KERNEL: | |
ffe60014 | 2123 | return lttng_kconsumer_take_snapshot(stream); |
7753dea8 MD |
2124 | case LTTNG_CONSUMER32_UST: |
2125 | case LTTNG_CONSUMER64_UST: | |
ffe60014 | 2126 | return lttng_ustconsumer_take_snapshot(stream); |
3bd1e081 MD |
2127 | default: |
2128 | ERR("Unknown consumer_data type"); | |
2129 | assert(0); | |
2130 | return -ENOSYS; | |
2131 | } | |
3bd1e081 MD |
2132 | } |
2133 | ||
2134 | /* | |
2135 | * Get the produced position | |
2136 | * | |
2137 | * Returns 0 on success, < 0 on error | |
2138 | */ | |
ffe60014 | 2139 | int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
2140 | unsigned long *pos) |
2141 | { | |
2142 | switch (consumer_data.type) { | |
2143 | case LTTNG_CONSUMER_KERNEL: | |
ffe60014 | 2144 | return lttng_kconsumer_get_produced_snapshot(stream, pos); |
7753dea8 MD |
2145 | case LTTNG_CONSUMER32_UST: |
2146 | case LTTNG_CONSUMER64_UST: | |
ffe60014 | 2147 | return lttng_ustconsumer_get_produced_snapshot(stream, pos); |
3bd1e081 MD |
2148 | default: |
2149 | ERR("Unknown consumer_data type"); | |
2150 | assert(0); | |
2151 | return -ENOSYS; | |
2152 | } | |
2153 | } | |
2154 | ||
15055ce5 JD |
2155 | /* |
2156 | * Get the consumed position (free-running counter position in bytes). | |
2157 | * | |
2158 | * Returns 0 on success, < 0 on error | |
2159 | */ | |
2160 | int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
2161 | unsigned long *pos) | |
2162 | { | |
2163 | switch (consumer_data.type) { | |
2164 | case LTTNG_CONSUMER_KERNEL: | |
2165 | return lttng_kconsumer_get_consumed_snapshot(stream, pos); | |
2166 | case LTTNG_CONSUMER32_UST: | |
2167 | case LTTNG_CONSUMER64_UST: | |
2168 | return lttng_ustconsumer_get_consumed_snapshot(stream, pos); | |
2169 | default: | |
2170 | ERR("Unknown consumer_data type"); | |
2171 | assert(0); | |
2172 | return -ENOSYS; | |
2173 | } | |
2174 | } | |
2175 | ||
3bd1e081 MD |
2176 | int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
2177 | int sock, struct pollfd *consumer_sockpoll) | |
2178 | { | |
2179 | switch (consumer_data.type) { | |
2180 | case LTTNG_CONSUMER_KERNEL: | |
2181 | return lttng_kconsumer_recv_cmd(ctx, sock, consumer_sockpoll); | |
7753dea8 MD |
2182 | case LTTNG_CONSUMER32_UST: |
2183 | case LTTNG_CONSUMER64_UST: | |
3bd1e081 MD |
2184 | return lttng_ustconsumer_recv_cmd(ctx, sock, consumer_sockpoll); |
2185 | default: | |
2186 | ERR("Unknown consumer_data type"); | |
2187 | assert(0); | |
2188 | return -ENOSYS; | |
2189 | } | |
2190 | } | |
2191 | ||
1f8d1c14 | 2192 | static |
6d574024 | 2193 | void lttng_consumer_close_all_metadata(void) |
d88aee68 DG |
2194 | { |
2195 | switch (consumer_data.type) { | |
2196 | case LTTNG_CONSUMER_KERNEL: | |
2197 | /* | |
2198 | * The Kernel consumer has a different metadata scheme so we don't | |
2199 | * close anything because the stream will be closed by the session | |
2200 | * daemon. | |
2201 | */ | |
2202 | break; | |
2203 | case LTTNG_CONSUMER32_UST: | |
2204 | case LTTNG_CONSUMER64_UST: | |
2205 | /* | |
2206 | * Close all metadata streams. The metadata hash table is passed and | |
2207 | * this call iterates over it by closing all wakeup fd. This is safe | |
2208 | * because at this point we are sure that the metadata producer is | |
2209 | * either dead or blocked. | |
2210 | */ | |
6d574024 | 2211 | lttng_ustconsumer_close_all_metadata(metadata_ht); |
d88aee68 DG |
2212 | break; |
2213 | default: | |
2214 | ERR("Unknown consumer_data type"); | |
2215 | assert(0); | |
2216 | } | |
2217 | } | |
2218 | ||
fb3a43a9 DG |
2219 | /* |
2220 | * Clean up a metadata stream and free its memory. | |
2221 | */ | |
e316aad5 DG |
2222 | void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, |
2223 | struct lttng_ht *ht) | |
fb3a43a9 | 2224 | { |
a6ef8ee6 JG |
2225 | struct lttng_consumer_channel *channel = NULL; |
2226 | bool free_channel = false; | |
fb3a43a9 DG |
2227 | |
2228 | assert(stream); | |
2229 | /* | |
2230 | * This call should NEVER receive regular stream. It must always be | |
2231 | * metadata stream and this is crucial for data structure synchronization. | |
2232 | */ | |
2233 | assert(stream->metadata_flag); | |
2234 | ||
e316aad5 DG |
2235 | DBG3("Consumer delete metadata stream %d", stream->wait_fd); |
2236 | ||
74251bb8 | 2237 | pthread_mutex_lock(&consumer_data.lock); |
a6ef8ee6 JG |
2238 | /* |
2239 | * Note that this assumes that a stream's channel is never changed and | |
2240 | * that the stream's lock doesn't need to be taken to sample its | |
2241 | * channel. | |
2242 | */ | |
2243 | channel = stream->chan; | |
2244 | pthread_mutex_lock(&channel->lock); | |
3dad2c0f | 2245 | pthread_mutex_lock(&stream->lock); |
a6ef8ee6 | 2246 | if (channel->metadata_cache) { |
081424af | 2247 | /* Only applicable to userspace consumers. */ |
a6ef8ee6 | 2248 | pthread_mutex_lock(&channel->metadata_cache->lock); |
081424af | 2249 | } |
8994307f | 2250 | |
6d574024 DG |
2251 | /* Remove any reference to that stream. */ |
2252 | consumer_stream_delete(stream, ht); | |
ca22feea | 2253 | |
6d574024 DG |
2254 | /* Close down everything including the relayd if one. */ |
2255 | consumer_stream_close(stream); | |
2256 | /* Destroy tracer buffers of the stream. */ | |
2257 | consumer_stream_destroy_buffers(stream); | |
fb3a43a9 DG |
2258 | |
2259 | /* Atomically decrement channel refcount since other threads can use it. */ | |
a6ef8ee6 JG |
2260 | if (!uatomic_sub_return(&channel->refcount, 1) |
2261 | && !uatomic_read(&channel->nb_init_stream_left)) { | |
c30aaa51 | 2262 | /* Go for channel deletion! */ |
a6ef8ee6 | 2263 | free_channel = true; |
fb3a43a9 | 2264 | } |
a6ef8ee6 | 2265 | stream->chan = NULL; |
fb3a43a9 | 2266 | |
73811ecc DG |
2267 | /* |
2268 | * Nullify the stream reference so it is not used after deletion. The | |
6d574024 DG |
2269 | * channel lock MUST be acquired before being able to check for a NULL |
2270 | * pointer value. | |
73811ecc | 2271 | */ |
a6ef8ee6 | 2272 | channel->metadata_stream = NULL; |
73811ecc | 2273 | |
a6ef8ee6 JG |
2274 | if (channel->metadata_cache) { |
2275 | pthread_mutex_unlock(&channel->metadata_cache->lock); | |
081424af | 2276 | } |
3dad2c0f | 2277 | pthread_mutex_unlock(&stream->lock); |
a6ef8ee6 | 2278 | pthread_mutex_unlock(&channel->lock); |
74251bb8 | 2279 | pthread_mutex_unlock(&consumer_data.lock); |
e316aad5 | 2280 | |
a6ef8ee6 JG |
2281 | if (free_channel) { |
2282 | consumer_del_channel(channel); | |
e316aad5 DG |
2283 | } |
2284 | ||
d2956687 JG |
2285 | lttng_trace_chunk_put(stream->trace_chunk); |
2286 | stream->trace_chunk = NULL; | |
6d574024 | 2287 | consumer_stream_free(stream); |
fb3a43a9 DG |
2288 | } |
2289 | ||
2290 | /* | |
2291 | * Action done with the metadata stream when adding it to the consumer internal | |
2292 | * data structures to handle it. | |
2293 | */ | |
66d583dc | 2294 | void consumer_add_metadata_stream(struct lttng_consumer_stream *stream) |
fb3a43a9 | 2295 | { |
5ab66908 | 2296 | struct lttng_ht *ht = metadata_ht; |
76082088 | 2297 | struct lttng_ht_iter iter; |
d88aee68 | 2298 | struct lttng_ht_node_u64 *node; |
fb3a43a9 | 2299 | |
e316aad5 DG |
2300 | assert(stream); |
2301 | assert(ht); | |
2302 | ||
d88aee68 | 2303 | DBG3("Adding metadata stream %" PRIu64 " to hash table", stream->key); |
e316aad5 DG |
2304 | |
2305 | pthread_mutex_lock(&consumer_data.lock); | |
a9838785 | 2306 | pthread_mutex_lock(&stream->chan->lock); |
ec6ea7d0 | 2307 | pthread_mutex_lock(&stream->chan->timer_lock); |
2e818a6a | 2308 | pthread_mutex_lock(&stream->lock); |
e316aad5 | 2309 | |
e316aad5 DG |
2310 | /* |
2311 | * From here, refcounts are updated so be _careful_ when returning an error | |
2312 | * after this point. | |
2313 | */ | |
2314 | ||
fb3a43a9 | 2315 | rcu_read_lock(); |
76082088 DG |
2316 | |
2317 | /* | |
2318 | * Lookup the stream just to make sure it does not exist in our internal | |
2319 | * state. This should NEVER happen. | |
2320 | */ | |
d88aee68 DG |
2321 | lttng_ht_lookup(ht, &stream->key, &iter); |
2322 | node = lttng_ht_iter_get_node_u64(&iter); | |
76082088 DG |
2323 | assert(!node); |
2324 | ||
e316aad5 | 2325 | /* |
ffe60014 DG |
2326 | * When nb_init_stream_left reaches 0, we don't need to trigger any action |
2327 | * in terms of destroying the associated channel, because the action that | |
e316aad5 DG |
2328 | * causes the count to become 0 also causes a stream to be added. The |
2329 | * channel deletion will thus be triggered by the following removal of this | |
2330 | * stream. | |
2331 | */ | |
ffe60014 | 2332 | if (uatomic_read(&stream->chan->nb_init_stream_left) > 0) { |
f2ad556d MD |
2333 | /* Increment refcount before decrementing nb_init_stream_left */ |
2334 | cmm_smp_wmb(); | |
ffe60014 | 2335 | uatomic_dec(&stream->chan->nb_init_stream_left); |
e316aad5 DG |
2336 | } |
2337 | ||
d88aee68 | 2338 | lttng_ht_add_unique_u64(ht, &stream->node); |
ca22feea | 2339 | |
446156b4 | 2340 | lttng_ht_add_u64(consumer_data.stream_per_chan_id_ht, |
d8ef542d MD |
2341 | &stream->node_channel_id); |
2342 | ||
ca22feea DG |
2343 | /* |
2344 | * Add stream to the stream_list_ht of the consumer data. No need to steal | |
2345 | * the key since the HT does not use it and we allow to add redundant keys | |
2346 | * into this table. | |
2347 | */ | |
d88aee68 | 2348 | lttng_ht_add_u64(consumer_data.stream_list_ht, &stream->node_session_id); |
ca22feea | 2349 | |
fb3a43a9 | 2350 | rcu_read_unlock(); |
e316aad5 | 2351 | |
2e818a6a | 2352 | pthread_mutex_unlock(&stream->lock); |
a9838785 | 2353 | pthread_mutex_unlock(&stream->chan->lock); |
ec6ea7d0 | 2354 | pthread_mutex_unlock(&stream->chan->timer_lock); |
e316aad5 | 2355 | pthread_mutex_unlock(&consumer_data.lock); |
fb3a43a9 DG |
2356 | } |
2357 | ||
8994307f DG |
2358 | /* |
2359 | * Delete data stream that are flagged for deletion (endpoint_status). | |
2360 | */ | |
2361 | static void validate_endpoint_status_data_stream(void) | |
2362 | { | |
2363 | struct lttng_ht_iter iter; | |
2364 | struct lttng_consumer_stream *stream; | |
2365 | ||
2366 | DBG("Consumer delete flagged data stream"); | |
2367 | ||
2368 | rcu_read_lock(); | |
2369 | cds_lfht_for_each_entry(data_ht->ht, &iter.iter, stream, node.node) { | |
2370 | /* Validate delete flag of the stream */ | |
79d4ffb7 | 2371 | if (stream->endpoint_status == CONSUMER_ENDPOINT_ACTIVE) { |
8994307f DG |
2372 | continue; |
2373 | } | |
2374 | /* Delete it right now */ | |
2375 | consumer_del_stream(stream, data_ht); | |
2376 | } | |
2377 | rcu_read_unlock(); | |
2378 | } | |
2379 | ||
2380 | /* | |
2381 | * Delete metadata stream that are flagged for deletion (endpoint_status). | |
2382 | */ | |
2383 | static void validate_endpoint_status_metadata_stream( | |
2384 | struct lttng_poll_event *pollset) | |
2385 | { | |
2386 | struct lttng_ht_iter iter; | |
2387 | struct lttng_consumer_stream *stream; | |
2388 | ||
2389 | DBG("Consumer delete flagged metadata stream"); | |
2390 | ||
2391 | assert(pollset); | |
2392 | ||
2393 | rcu_read_lock(); | |
2394 | cds_lfht_for_each_entry(metadata_ht->ht, &iter.iter, stream, node.node) { | |
2395 | /* Validate delete flag of the stream */ | |
79d4ffb7 | 2396 | if (stream->endpoint_status == CONSUMER_ENDPOINT_ACTIVE) { |
8994307f DG |
2397 | continue; |
2398 | } | |
2399 | /* | |
2400 | * Remove from pollset so the metadata thread can continue without | |
2401 | * blocking on a deleted stream. | |
2402 | */ | |
2403 | lttng_poll_del(pollset, stream->wait_fd); | |
2404 | ||
2405 | /* Delete it right now */ | |
2406 | consumer_del_metadata_stream(stream, metadata_ht); | |
2407 | } | |
2408 | rcu_read_unlock(); | |
2409 | } | |
2410 | ||
fb3a43a9 DG |
2411 | /* |
2412 | * Thread polls on metadata file descriptor and write them on disk or on the | |
2413 | * network. | |
2414 | */ | |
7d980def | 2415 | void *consumer_thread_metadata_poll(void *data) |
fb3a43a9 | 2416 | { |
1fc79fb4 | 2417 | int ret, i, pollfd, err = -1; |
fb3a43a9 | 2418 | uint32_t revents, nb_fd; |
e316aad5 | 2419 | struct lttng_consumer_stream *stream = NULL; |
fb3a43a9 | 2420 | struct lttng_ht_iter iter; |
d88aee68 | 2421 | struct lttng_ht_node_u64 *node; |
fb3a43a9 DG |
2422 | struct lttng_poll_event events; |
2423 | struct lttng_consumer_local_data *ctx = data; | |
2424 | ssize_t len; | |
2425 | ||
2426 | rcu_register_thread(); | |
2427 | ||
1fc79fb4 MD |
2428 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_METADATA); |
2429 | ||
2d57de81 MD |
2430 | if (testpoint(consumerd_thread_metadata)) { |
2431 | goto error_testpoint; | |
2432 | } | |
2433 | ||
9ce5646a MD |
2434 | health_code_update(); |
2435 | ||
fb3a43a9 DG |
2436 | DBG("Thread metadata poll started"); |
2437 | ||
fb3a43a9 DG |
2438 | /* Size is set to 1 for the consumer_metadata pipe */ |
2439 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
2440 | if (ret < 0) { | |
2441 | ERR("Poll set creation failed"); | |
d8ef542d | 2442 | goto end_poll; |
fb3a43a9 DG |
2443 | } |
2444 | ||
13886d2d DG |
2445 | ret = lttng_poll_add(&events, |
2446 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe), LPOLLIN); | |
fb3a43a9 DG |
2447 | if (ret < 0) { |
2448 | goto end; | |
2449 | } | |
2450 | ||
2451 | /* Main loop */ | |
2452 | DBG("Metadata main loop started"); | |
2453 | ||
2454 | while (1) { | |
fb3a43a9 | 2455 | restart: |
7fa2082e | 2456 | health_code_update(); |
9ce5646a | 2457 | health_poll_entry(); |
7fa2082e | 2458 | DBG("Metadata poll wait"); |
fb3a43a9 | 2459 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
2460 | DBG("Metadata poll return from wait with %d fd(s)", |
2461 | LTTNG_POLL_GETNB(&events)); | |
9ce5646a | 2462 | health_poll_exit(); |
40063ead | 2463 | DBG("Metadata event caught in thread"); |
fb3a43a9 DG |
2464 | if (ret < 0) { |
2465 | if (errno == EINTR) { | |
40063ead | 2466 | ERR("Poll EINTR caught"); |
fb3a43a9 DG |
2467 | goto restart; |
2468 | } | |
d9607cd7 MD |
2469 | if (LTTNG_POLL_GETNB(&events) == 0) { |
2470 | err = 0; /* All is OK */ | |
2471 | } | |
2472 | goto end; | |
fb3a43a9 DG |
2473 | } |
2474 | ||
0d9c5d77 DG |
2475 | nb_fd = ret; |
2476 | ||
e316aad5 | 2477 | /* From here, the event is a metadata wait fd */ |
fb3a43a9 | 2478 | for (i = 0; i < nb_fd; i++) { |
9ce5646a MD |
2479 | health_code_update(); |
2480 | ||
fb3a43a9 DG |
2481 | revents = LTTNG_POLL_GETEV(&events, i); |
2482 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2483 | ||
13886d2d | 2484 | if (pollfd == lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)) { |
03e43155 | 2485 | if (revents & LPOLLIN) { |
13886d2d DG |
2486 | ssize_t pipe_len; |
2487 | ||
2488 | pipe_len = lttng_pipe_read(ctx->consumer_metadata_pipe, | |
2489 | &stream, sizeof(stream)); | |
6cd525e8 | 2490 | if (pipe_len < sizeof(stream)) { |
03e43155 MD |
2491 | if (pipe_len < 0) { |
2492 | PERROR("read metadata stream"); | |
2493 | } | |
fb3a43a9 | 2494 | /* |
03e43155 MD |
2495 | * Remove the pipe from the poll set and continue the loop |
2496 | * since their might be data to consume. | |
fb3a43a9 | 2497 | */ |
03e43155 MD |
2498 | lttng_poll_del(&events, |
2499 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)); | |
2500 | lttng_pipe_read_close(ctx->consumer_metadata_pipe); | |
fb3a43a9 DG |
2501 | continue; |
2502 | } | |
2503 | ||
8994307f DG |
2504 | /* A NULL stream means that the state has changed. */ |
2505 | if (stream == NULL) { | |
2506 | /* Check for deleted streams. */ | |
2507 | validate_endpoint_status_metadata_stream(&events); | |
3714380f | 2508 | goto restart; |
8994307f DG |
2509 | } |
2510 | ||
fb3a43a9 DG |
2511 | DBG("Adding metadata stream %d to poll set", |
2512 | stream->wait_fd); | |
2513 | ||
fb3a43a9 DG |
2514 | /* Add metadata stream to the global poll events list */ |
2515 | lttng_poll_add(&events, stream->wait_fd, | |
6d574024 | 2516 | LPOLLIN | LPOLLPRI | LPOLLHUP); |
03e43155 MD |
2517 | } else if (revents & (LPOLLERR | LPOLLHUP)) { |
2518 | DBG("Metadata thread pipe hung up"); | |
2519 | /* | |
2520 | * Remove the pipe from the poll set and continue the loop | |
2521 | * since their might be data to consume. | |
2522 | */ | |
2523 | lttng_poll_del(&events, | |
2524 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)); | |
2525 | lttng_pipe_read_close(ctx->consumer_metadata_pipe); | |
2526 | continue; | |
2527 | } else { | |
2528 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2529 | goto end; | |
fb3a43a9 DG |
2530 | } |
2531 | ||
e316aad5 | 2532 | /* Handle other stream */ |
fb3a43a9 DG |
2533 | continue; |
2534 | } | |
2535 | ||
d09e1200 | 2536 | rcu_read_lock(); |
d88aee68 DG |
2537 | { |
2538 | uint64_t tmp_id = (uint64_t) pollfd; | |
2539 | ||
2540 | lttng_ht_lookup(metadata_ht, &tmp_id, &iter); | |
2541 | } | |
2542 | node = lttng_ht_iter_get_node_u64(&iter); | |
e316aad5 | 2543 | assert(node); |
fb3a43a9 DG |
2544 | |
2545 | stream = caa_container_of(node, struct lttng_consumer_stream, | |
58b1f425 | 2546 | node); |
fb3a43a9 | 2547 | |
03e43155 MD |
2548 | if (revents & (LPOLLIN | LPOLLPRI)) { |
2549 | /* Get the data out of the metadata file descriptor */ | |
2550 | DBG("Metadata available on fd %d", pollfd); | |
2551 | assert(stream->wait_fd == pollfd); | |
2552 | ||
2553 | do { | |
2554 | health_code_update(); | |
2555 | ||
2556 | len = ctx->on_buffer_ready(stream, ctx); | |
2557 | /* | |
2558 | * We don't check the return value here since if we get | |
83f4233d | 2559 | * a negative len, it means an error occurred thus we |
03e43155 MD |
2560 | * simply remove it from the poll set and free the |
2561 | * stream. | |
2562 | */ | |
2563 | } while (len > 0); | |
2564 | ||
2565 | /* It's ok to have an unavailable sub-buffer */ | |
2566 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { | |
2567 | /* Clean up stream from consumer and free it. */ | |
2568 | lttng_poll_del(&events, stream->wait_fd); | |
2569 | consumer_del_metadata_stream(stream, metadata_ht); | |
2570 | } | |
2571 | } else if (revents & (LPOLLERR | LPOLLHUP)) { | |
e316aad5 | 2572 | DBG("Metadata fd %d is hup|err.", pollfd); |
fb3a43a9 DG |
2573 | if (!stream->hangup_flush_done |
2574 | && (consumer_data.type == LTTNG_CONSUMER32_UST | |
2575 | || consumer_data.type == LTTNG_CONSUMER64_UST)) { | |
2576 | DBG("Attempting to flush and consume the UST buffers"); | |
2577 | lttng_ustconsumer_on_stream_hangup(stream); | |
2578 | ||
2579 | /* We just flushed the stream now read it. */ | |
4bb94b75 | 2580 | do { |
9ce5646a MD |
2581 | health_code_update(); |
2582 | ||
4bb94b75 DG |
2583 | len = ctx->on_buffer_ready(stream, ctx); |
2584 | /* | |
2585 | * We don't check the return value here since if we get | |
83f4233d | 2586 | * a negative len, it means an error occurred thus we |
4bb94b75 DG |
2587 | * simply remove it from the poll set and free the |
2588 | * stream. | |
2589 | */ | |
2590 | } while (len > 0); | |
fb3a43a9 DG |
2591 | } |
2592 | ||
fb3a43a9 | 2593 | lttng_poll_del(&events, stream->wait_fd); |
e316aad5 DG |
2594 | /* |
2595 | * This call update the channel states, closes file descriptors | |
2596 | * and securely free the stream. | |
2597 | */ | |
2598 | consumer_del_metadata_stream(stream, metadata_ht); | |
03e43155 MD |
2599 | } else { |
2600 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
6f2f1a70 | 2601 | rcu_read_unlock(); |
03e43155 | 2602 | goto end; |
fb3a43a9 | 2603 | } |
e316aad5 | 2604 | /* Release RCU lock for the stream looked up */ |
d09e1200 | 2605 | rcu_read_unlock(); |
fb3a43a9 DG |
2606 | } |
2607 | } | |
2608 | ||
1fc79fb4 MD |
2609 | /* All is OK */ |
2610 | err = 0; | |
fb3a43a9 DG |
2611 | end: |
2612 | DBG("Metadata poll thread exiting"); | |
fb3a43a9 | 2613 | |
d8ef542d MD |
2614 | lttng_poll_clean(&events); |
2615 | end_poll: | |
2d57de81 | 2616 | error_testpoint: |
1fc79fb4 MD |
2617 | if (err) { |
2618 | health_error(); | |
2619 | ERR("Health error occurred in %s", __func__); | |
2620 | } | |
2621 | health_unregister(health_consumerd); | |
fb3a43a9 DG |
2622 | rcu_unregister_thread(); |
2623 | return NULL; | |
2624 | } | |
2625 | ||
3bd1e081 | 2626 | /* |
e4421fec | 2627 | * This thread polls the fds in the set to consume the data and write |
3bd1e081 MD |
2628 | * it to tracefile if necessary. |
2629 | */ | |
7d980def | 2630 | void *consumer_thread_data_poll(void *data) |
3bd1e081 | 2631 | { |
1fc79fb4 | 2632 | int num_rdy, num_hup, high_prio, ret, i, err = -1; |
3bd1e081 MD |
2633 | struct pollfd *pollfd = NULL; |
2634 | /* local view of the streams */ | |
c869f647 | 2635 | struct lttng_consumer_stream **local_stream = NULL, *new_stream = NULL; |
3bd1e081 | 2636 | /* local view of consumer_data.fds_count */ |
8bdcc002 JG |
2637 | int nb_fd = 0; |
2638 | /* 2 for the consumer_data_pipe and wake up pipe */ | |
2639 | const int nb_pipes_fd = 2; | |
9a2fcf78 JD |
2640 | /* Number of FDs with CONSUMER_ENDPOINT_INACTIVE but still open. */ |
2641 | int nb_inactive_fd = 0; | |
3bd1e081 | 2642 | struct lttng_consumer_local_data *ctx = data; |
00e2e675 | 2643 | ssize_t len; |
3bd1e081 | 2644 | |
e7b994a3 DG |
2645 | rcu_register_thread(); |
2646 | ||
1fc79fb4 MD |
2647 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_DATA); |
2648 | ||
2d57de81 MD |
2649 | if (testpoint(consumerd_thread_data)) { |
2650 | goto error_testpoint; | |
2651 | } | |
2652 | ||
9ce5646a MD |
2653 | health_code_update(); |
2654 | ||
4df6c8cb MD |
2655 | local_stream = zmalloc(sizeof(struct lttng_consumer_stream *)); |
2656 | if (local_stream == NULL) { | |
2657 | PERROR("local_stream malloc"); | |
2658 | goto end; | |
2659 | } | |
3bd1e081 MD |
2660 | |
2661 | while (1) { | |
9ce5646a MD |
2662 | health_code_update(); |
2663 | ||
3bd1e081 MD |
2664 | high_prio = 0; |
2665 | num_hup = 0; | |
2666 | ||
2667 | /* | |
e4421fec | 2668 | * the fds set has been updated, we need to update our |
3bd1e081 MD |
2669 | * local array as well |
2670 | */ | |
2671 | pthread_mutex_lock(&consumer_data.lock); | |
2672 | if (consumer_data.need_update) { | |
0e428499 DG |
2673 | free(pollfd); |
2674 | pollfd = NULL; | |
2675 | ||
2676 | free(local_stream); | |
2677 | local_stream = NULL; | |
3bd1e081 | 2678 | |
8bdcc002 | 2679 | /* Allocate for all fds */ |
261de637 | 2680 | pollfd = zmalloc((consumer_data.stream_count + nb_pipes_fd) * sizeof(struct pollfd)); |
3bd1e081 | 2681 | if (pollfd == NULL) { |
7a57cf92 | 2682 | PERROR("pollfd malloc"); |
3bd1e081 MD |
2683 | pthread_mutex_unlock(&consumer_data.lock); |
2684 | goto end; | |
2685 | } | |
2686 | ||
261de637 | 2687 | local_stream = zmalloc((consumer_data.stream_count + nb_pipes_fd) * |
747f8642 | 2688 | sizeof(struct lttng_consumer_stream *)); |
3bd1e081 | 2689 | if (local_stream == NULL) { |
7a57cf92 | 2690 | PERROR("local_stream malloc"); |
3bd1e081 MD |
2691 | pthread_mutex_unlock(&consumer_data.lock); |
2692 | goto end; | |
2693 | } | |
ffe60014 | 2694 | ret = update_poll_array(ctx, &pollfd, local_stream, |
9a2fcf78 | 2695 | data_ht, &nb_inactive_fd); |
3bd1e081 MD |
2696 | if (ret < 0) { |
2697 | ERR("Error in allocating pollfd or local_outfds"); | |
f73fabfd | 2698 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
3bd1e081 MD |
2699 | pthread_mutex_unlock(&consumer_data.lock); |
2700 | goto end; | |
2701 | } | |
2702 | nb_fd = ret; | |
2703 | consumer_data.need_update = 0; | |
2704 | } | |
2705 | pthread_mutex_unlock(&consumer_data.lock); | |
2706 | ||
4078b776 | 2707 | /* No FDs and consumer_quit, consumer_cleanup the thread */ |
9a2fcf78 JD |
2708 | if (nb_fd == 0 && nb_inactive_fd == 0 && |
2709 | CMM_LOAD_SHARED(consumer_quit) == 1) { | |
1fc79fb4 | 2710 | err = 0; /* All is OK */ |
4078b776 MD |
2711 | goto end; |
2712 | } | |
3bd1e081 | 2713 | /* poll on the array of fds */ |
88f2b785 | 2714 | restart: |
261de637 | 2715 | DBG("polling on %d fd", nb_fd + nb_pipes_fd); |
cf0bcb51 JG |
2716 | if (testpoint(consumerd_thread_data_poll)) { |
2717 | goto end; | |
2718 | } | |
9ce5646a | 2719 | health_poll_entry(); |
261de637 | 2720 | num_rdy = poll(pollfd, nb_fd + nb_pipes_fd, -1); |
9ce5646a | 2721 | health_poll_exit(); |
3bd1e081 MD |
2722 | DBG("poll num_rdy : %d", num_rdy); |
2723 | if (num_rdy == -1) { | |
88f2b785 MD |
2724 | /* |
2725 | * Restart interrupted system call. | |
2726 | */ | |
2727 | if (errno == EINTR) { | |
2728 | goto restart; | |
2729 | } | |
7a57cf92 | 2730 | PERROR("Poll error"); |
f73fabfd | 2731 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
3bd1e081 MD |
2732 | goto end; |
2733 | } else if (num_rdy == 0) { | |
2734 | DBG("Polling thread timed out"); | |
2735 | goto end; | |
2736 | } | |
2737 | ||
80957876 JG |
2738 | if (caa_unlikely(data_consumption_paused)) { |
2739 | DBG("Data consumption paused, sleeping..."); | |
2740 | sleep(1); | |
2741 | goto restart; | |
2742 | } | |
2743 | ||
3bd1e081 | 2744 | /* |
50f8ae69 | 2745 | * If the consumer_data_pipe triggered poll go directly to the |
00e2e675 DG |
2746 | * beginning of the loop to update the array. We want to prioritize |
2747 | * array update over low-priority reads. | |
3bd1e081 | 2748 | */ |
509bb1cf | 2749 | if (pollfd[nb_fd].revents & (POLLIN | POLLPRI)) { |
ab30f567 | 2750 | ssize_t pipe_readlen; |
04fdd819 | 2751 | |
50f8ae69 | 2752 | DBG("consumer_data_pipe wake up"); |
acdb9057 DG |
2753 | pipe_readlen = lttng_pipe_read(ctx->consumer_data_pipe, |
2754 | &new_stream, sizeof(new_stream)); | |
6cd525e8 MD |
2755 | if (pipe_readlen < sizeof(new_stream)) { |
2756 | PERROR("Consumer data pipe"); | |
23f5f35d DG |
2757 | /* Continue so we can at least handle the current stream(s). */ |
2758 | continue; | |
2759 | } | |
c869f647 DG |
2760 | |
2761 | /* | |
2762 | * If the stream is NULL, just ignore it. It's also possible that | |
2763 | * the sessiond poll thread changed the consumer_quit state and is | |
2764 | * waking us up to test it. | |
2765 | */ | |
2766 | if (new_stream == NULL) { | |
8994307f | 2767 | validate_endpoint_status_data_stream(); |
c869f647 DG |
2768 | continue; |
2769 | } | |
2770 | ||
c869f647 | 2771 | /* Continue to update the local streams and handle prio ones */ |
3bd1e081 MD |
2772 | continue; |
2773 | } | |
2774 | ||
02b3d176 DG |
2775 | /* Handle wakeup pipe. */ |
2776 | if (pollfd[nb_fd + 1].revents & (POLLIN | POLLPRI)) { | |
2777 | char dummy; | |
2778 | ssize_t pipe_readlen; | |
2779 | ||
2780 | pipe_readlen = lttng_pipe_read(ctx->consumer_wakeup_pipe, &dummy, | |
2781 | sizeof(dummy)); | |
2782 | if (pipe_readlen < 0) { | |
2783 | PERROR("Consumer data wakeup pipe"); | |
2784 | } | |
2785 | /* We've been awakened to handle stream(s). */ | |
2786 | ctx->has_wakeup = 0; | |
2787 | } | |
2788 | ||
3bd1e081 MD |
2789 | /* Take care of high priority channels first. */ |
2790 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2791 | health_code_update(); |
2792 | ||
9617607b DG |
2793 | if (local_stream[i] == NULL) { |
2794 | continue; | |
2795 | } | |
fb3a43a9 | 2796 | if (pollfd[i].revents & POLLPRI) { |
d41f73b7 MD |
2797 | DBG("Urgent read on fd %d", pollfd[i].fd); |
2798 | high_prio = 1; | |
4078b776 | 2799 | len = ctx->on_buffer_ready(local_stream[i], ctx); |
d41f73b7 | 2800 | /* it's ok to have an unavailable sub-buffer */ |
b64403e3 | 2801 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { |
ab1027f4 DG |
2802 | /* Clean the stream and free it. */ |
2803 | consumer_del_stream(local_stream[i], data_ht); | |
9617607b | 2804 | local_stream[i] = NULL; |
4078b776 MD |
2805 | } else if (len > 0) { |
2806 | local_stream[i]->data_read = 1; | |
d41f73b7 | 2807 | } |
3bd1e081 MD |
2808 | } |
2809 | } | |
2810 | ||
4078b776 MD |
2811 | /* |
2812 | * If we read high prio channel in this loop, try again | |
2813 | * for more high prio data. | |
2814 | */ | |
2815 | if (high_prio) { | |
3bd1e081 MD |
2816 | continue; |
2817 | } | |
2818 | ||
2819 | /* Take care of low priority channels. */ | |
4078b776 | 2820 | for (i = 0; i < nb_fd; i++) { |
9ce5646a MD |
2821 | health_code_update(); |
2822 | ||
9617607b DG |
2823 | if (local_stream[i] == NULL) { |
2824 | continue; | |
2825 | } | |
4078b776 | 2826 | if ((pollfd[i].revents & POLLIN) || |
02b3d176 DG |
2827 | local_stream[i]->hangup_flush_done || |
2828 | local_stream[i]->has_data) { | |
4078b776 MD |
2829 | DBG("Normal read on fd %d", pollfd[i].fd); |
2830 | len = ctx->on_buffer_ready(local_stream[i], ctx); | |
2831 | /* it's ok to have an unavailable sub-buffer */ | |
b64403e3 | 2832 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { |
ab1027f4 DG |
2833 | /* Clean the stream and free it. */ |
2834 | consumer_del_stream(local_stream[i], data_ht); | |
9617607b | 2835 | local_stream[i] = NULL; |
4078b776 MD |
2836 | } else if (len > 0) { |
2837 | local_stream[i]->data_read = 1; | |
2838 | } | |
2839 | } | |
2840 | } | |
2841 | ||
2842 | /* Handle hangup and errors */ | |
2843 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2844 | health_code_update(); |
2845 | ||
9617607b DG |
2846 | if (local_stream[i] == NULL) { |
2847 | continue; | |
2848 | } | |
4078b776 MD |
2849 | if (!local_stream[i]->hangup_flush_done |
2850 | && (pollfd[i].revents & (POLLHUP | POLLERR | POLLNVAL)) | |
2851 | && (consumer_data.type == LTTNG_CONSUMER32_UST | |
2852 | || consumer_data.type == LTTNG_CONSUMER64_UST)) { | |
2853 | DBG("fd %d is hup|err|nval. Attempting flush and read.", | |
9617607b | 2854 | pollfd[i].fd); |
4078b776 MD |
2855 | lttng_ustconsumer_on_stream_hangup(local_stream[i]); |
2856 | /* Attempt read again, for the data we just flushed. */ | |
2857 | local_stream[i]->data_read = 1; | |
2858 | } | |
2859 | /* | |
2860 | * If the poll flag is HUP/ERR/NVAL and we have | |
2861 | * read no data in this pass, we can remove the | |
2862 | * stream from its hash table. | |
2863 | */ | |
2864 | if ((pollfd[i].revents & POLLHUP)) { | |
2865 | DBG("Polling fd %d tells it has hung up.", pollfd[i].fd); | |
2866 | if (!local_stream[i]->data_read) { | |
43c34bc3 | 2867 | consumer_del_stream(local_stream[i], data_ht); |
9617607b | 2868 | local_stream[i] = NULL; |
4078b776 MD |
2869 | num_hup++; |
2870 | } | |
2871 | } else if (pollfd[i].revents & POLLERR) { | |
2872 | ERR("Error returned in polling fd %d.", pollfd[i].fd); | |
2873 | if (!local_stream[i]->data_read) { | |
43c34bc3 | 2874 | consumer_del_stream(local_stream[i], data_ht); |
9617607b | 2875 | local_stream[i] = NULL; |
4078b776 MD |
2876 | num_hup++; |
2877 | } | |
2878 | } else if (pollfd[i].revents & POLLNVAL) { | |
2879 | ERR("Polling fd %d tells fd is not open.", pollfd[i].fd); | |
2880 | if (!local_stream[i]->data_read) { | |
43c34bc3 | 2881 | consumer_del_stream(local_stream[i], data_ht); |
9617607b | 2882 | local_stream[i] = NULL; |
4078b776 | 2883 | num_hup++; |
3bd1e081 MD |
2884 | } |
2885 | } | |
9617607b DG |
2886 | if (local_stream[i] != NULL) { |
2887 | local_stream[i]->data_read = 0; | |
2888 | } | |
3bd1e081 MD |
2889 | } |
2890 | } | |
1fc79fb4 MD |
2891 | /* All is OK */ |
2892 | err = 0; | |
3bd1e081 MD |
2893 | end: |
2894 | DBG("polling thread exiting"); | |
0e428499 DG |
2895 | free(pollfd); |
2896 | free(local_stream); | |
fb3a43a9 DG |
2897 | |
2898 | /* | |
2899 | * Close the write side of the pipe so epoll_wait() in | |
7d980def DG |
2900 | * consumer_thread_metadata_poll can catch it. The thread is monitoring the |
2901 | * read side of the pipe. If we close them both, epoll_wait strangely does | |
2902 | * not return and could create a endless wait period if the pipe is the | |
2903 | * only tracked fd in the poll set. The thread will take care of closing | |
2904 | * the read side. | |
fb3a43a9 | 2905 | */ |
13886d2d | 2906 | (void) lttng_pipe_write_close(ctx->consumer_metadata_pipe); |
fb3a43a9 | 2907 | |
2d57de81 | 2908 | error_testpoint: |
1fc79fb4 MD |
2909 | if (err) { |
2910 | health_error(); | |
2911 | ERR("Health error occurred in %s", __func__); | |
2912 | } | |
2913 | health_unregister(health_consumerd); | |
2914 | ||
e7b994a3 | 2915 | rcu_unregister_thread(); |
3bd1e081 MD |
2916 | return NULL; |
2917 | } | |
2918 | ||
d8ef542d MD |
2919 | /* |
2920 | * Close wake-up end of each stream belonging to the channel. This will | |
2921 | * allow the poll() on the stream read-side to detect when the | |
2922 | * write-side (application) finally closes them. | |
2923 | */ | |
2924 | static | |
2925 | void consumer_close_channel_streams(struct lttng_consumer_channel *channel) | |
2926 | { | |
2927 | struct lttng_ht *ht; | |
2928 | struct lttng_consumer_stream *stream; | |
2929 | struct lttng_ht_iter iter; | |
2930 | ||
2931 | ht = consumer_data.stream_per_chan_id_ht; | |
2932 | ||
2933 | rcu_read_lock(); | |
2934 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
2935 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
2936 | ht->match_fct, &channel->key, | |
2937 | &iter.iter, stream, node_channel_id.node) { | |
f2ad556d MD |
2938 | /* |
2939 | * Protect against teardown with mutex. | |
2940 | */ | |
2941 | pthread_mutex_lock(&stream->lock); | |
2942 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
2943 | goto next; | |
2944 | } | |
d8ef542d MD |
2945 | switch (consumer_data.type) { |
2946 | case LTTNG_CONSUMER_KERNEL: | |
2947 | break; | |
2948 | case LTTNG_CONSUMER32_UST: | |
2949 | case LTTNG_CONSUMER64_UST: | |
b4a650f3 DG |
2950 | if (stream->metadata_flag) { |
2951 | /* Safe and protected by the stream lock. */ | |
2952 | lttng_ustconsumer_close_metadata(stream->chan); | |
2953 | } else { | |
2954 | /* | |
2955 | * Note: a mutex is taken internally within | |
2956 | * liblttng-ust-ctl to protect timer wakeup_fd | |
2957 | * use from concurrent close. | |
2958 | */ | |
2959 | lttng_ustconsumer_close_stream_wakeup(stream); | |
2960 | } | |
d8ef542d MD |
2961 | break; |
2962 | default: | |
2963 | ERR("Unknown consumer_data type"); | |
2964 | assert(0); | |
2965 | } | |
f2ad556d MD |
2966 | next: |
2967 | pthread_mutex_unlock(&stream->lock); | |
d8ef542d MD |
2968 | } |
2969 | rcu_read_unlock(); | |
2970 | } | |
2971 | ||
2972 | static void destroy_channel_ht(struct lttng_ht *ht) | |
2973 | { | |
2974 | struct lttng_ht_iter iter; | |
2975 | struct lttng_consumer_channel *channel; | |
2976 | int ret; | |
2977 | ||
2978 | if (ht == NULL) { | |
2979 | return; | |
2980 | } | |
2981 | ||
2982 | rcu_read_lock(); | |
2983 | cds_lfht_for_each_entry(ht->ht, &iter.iter, channel, wait_fd_node.node) { | |
2984 | ret = lttng_ht_del(ht, &iter); | |
2985 | assert(ret != 0); | |
2986 | } | |
2987 | rcu_read_unlock(); | |
2988 | ||
2989 | lttng_ht_destroy(ht); | |
2990 | } | |
2991 | ||
2992 | /* | |
2993 | * This thread polls the channel fds to detect when they are being | |
2994 | * closed. It closes all related streams if the channel is detected as | |
2995 | * closed. It is currently only used as a shim layer for UST because the | |
2996 | * consumerd needs to keep the per-stream wakeup end of pipes open for | |
2997 | * periodical flush. | |
2998 | */ | |
2999 | void *consumer_thread_channel_poll(void *data) | |
3000 | { | |
1fc79fb4 | 3001 | int ret, i, pollfd, err = -1; |
d8ef542d MD |
3002 | uint32_t revents, nb_fd; |
3003 | struct lttng_consumer_channel *chan = NULL; | |
3004 | struct lttng_ht_iter iter; | |
3005 | struct lttng_ht_node_u64 *node; | |
3006 | struct lttng_poll_event events; | |
3007 | struct lttng_consumer_local_data *ctx = data; | |
3008 | struct lttng_ht *channel_ht; | |
3009 | ||
3010 | rcu_register_thread(); | |
3011 | ||
1fc79fb4 MD |
3012 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_CHANNEL); |
3013 | ||
2d57de81 MD |
3014 | if (testpoint(consumerd_thread_channel)) { |
3015 | goto error_testpoint; | |
3016 | } | |
3017 | ||
9ce5646a MD |
3018 | health_code_update(); |
3019 | ||
d8ef542d MD |
3020 | channel_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3021 | if (!channel_ht) { | |
3022 | /* ENOMEM at this point. Better to bail out. */ | |
3023 | goto end_ht; | |
3024 | } | |
3025 | ||
3026 | DBG("Thread channel poll started"); | |
3027 | ||
3028 | /* Size is set to 1 for the consumer_channel pipe */ | |
3029 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
3030 | if (ret < 0) { | |
3031 | ERR("Poll set creation failed"); | |
3032 | goto end_poll; | |
3033 | } | |
3034 | ||
3035 | ret = lttng_poll_add(&events, ctx->consumer_channel_pipe[0], LPOLLIN); | |
3036 | if (ret < 0) { | |
3037 | goto end; | |
3038 | } | |
3039 | ||
3040 | /* Main loop */ | |
3041 | DBG("Channel main loop started"); | |
3042 | ||
3043 | while (1) { | |
d8ef542d | 3044 | restart: |
7fa2082e MD |
3045 | health_code_update(); |
3046 | DBG("Channel poll wait"); | |
9ce5646a | 3047 | health_poll_entry(); |
d8ef542d | 3048 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
3049 | DBG("Channel poll return from wait with %d fd(s)", |
3050 | LTTNG_POLL_GETNB(&events)); | |
9ce5646a | 3051 | health_poll_exit(); |
40063ead | 3052 | DBG("Channel event caught in thread"); |
d8ef542d MD |
3053 | if (ret < 0) { |
3054 | if (errno == EINTR) { | |
40063ead | 3055 | ERR("Poll EINTR caught"); |
d8ef542d MD |
3056 | goto restart; |
3057 | } | |
d9607cd7 MD |
3058 | if (LTTNG_POLL_GETNB(&events) == 0) { |
3059 | err = 0; /* All is OK */ | |
3060 | } | |
d8ef542d MD |
3061 | goto end; |
3062 | } | |
3063 | ||
3064 | nb_fd = ret; | |
3065 | ||
3066 | /* From here, the event is a channel wait fd */ | |
3067 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
3068 | health_code_update(); |
3069 | ||
d8ef542d MD |
3070 | revents = LTTNG_POLL_GETEV(&events, i); |
3071 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3072 | ||
d8ef542d | 3073 | if (pollfd == ctx->consumer_channel_pipe[0]) { |
03e43155 | 3074 | if (revents & LPOLLIN) { |
d8ef542d | 3075 | enum consumer_channel_action action; |
a0cbdd2e | 3076 | uint64_t key; |
d8ef542d | 3077 | |
a0cbdd2e | 3078 | ret = read_channel_pipe(ctx, &chan, &key, &action); |
d8ef542d | 3079 | if (ret <= 0) { |
03e43155 MD |
3080 | if (ret < 0) { |
3081 | ERR("Error reading channel pipe"); | |
3082 | } | |
3083 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
d8ef542d MD |
3084 | continue; |
3085 | } | |
3086 | ||
3087 | switch (action) { | |
3088 | case CONSUMER_CHANNEL_ADD: | |
3089 | DBG("Adding channel %d to poll set", | |
3090 | chan->wait_fd); | |
3091 | ||
3092 | lttng_ht_node_init_u64(&chan->wait_fd_node, | |
3093 | chan->wait_fd); | |
c7260a81 | 3094 | rcu_read_lock(); |
d8ef542d MD |
3095 | lttng_ht_add_unique_u64(channel_ht, |
3096 | &chan->wait_fd_node); | |
c7260a81 | 3097 | rcu_read_unlock(); |
d8ef542d MD |
3098 | /* Add channel to the global poll events list */ |
3099 | lttng_poll_add(&events, chan->wait_fd, | |
03e43155 | 3100 | LPOLLERR | LPOLLHUP); |
d8ef542d | 3101 | break; |
a0cbdd2e MD |
3102 | case CONSUMER_CHANNEL_DEL: |
3103 | { | |
b4a650f3 DG |
3104 | /* |
3105 | * This command should never be called if the channel | |
3106 | * has streams monitored by either the data or metadata | |
3107 | * thread. The consumer only notify this thread with a | |
3108 | * channel del. command if it receives a destroy | |
3109 | * channel command from the session daemon that send it | |
3110 | * if a command prior to the GET_CHANNEL failed. | |
3111 | */ | |
3112 | ||
c7260a81 | 3113 | rcu_read_lock(); |
a0cbdd2e MD |
3114 | chan = consumer_find_channel(key); |
3115 | if (!chan) { | |
c7260a81 | 3116 | rcu_read_unlock(); |
a0cbdd2e MD |
3117 | ERR("UST consumer get channel key %" PRIu64 " not found for del channel", key); |
3118 | break; | |
3119 | } | |
3120 | lttng_poll_del(&events, chan->wait_fd); | |
f623cc0b | 3121 | iter.iter.node = &chan->wait_fd_node.node; |
a0cbdd2e MD |
3122 | ret = lttng_ht_del(channel_ht, &iter); |
3123 | assert(ret == 0); | |
a0cbdd2e | 3124 | |
f2a444f1 DG |
3125 | switch (consumer_data.type) { |
3126 | case LTTNG_CONSUMER_KERNEL: | |
3127 | break; | |
3128 | case LTTNG_CONSUMER32_UST: | |
3129 | case LTTNG_CONSUMER64_UST: | |
212d67a2 DG |
3130 | health_code_update(); |
3131 | /* Destroy streams that might have been left in the stream list. */ | |
3132 | clean_channel_stream_list(chan); | |
f2a444f1 DG |
3133 | break; |
3134 | default: | |
3135 | ERR("Unknown consumer_data type"); | |
3136 | assert(0); | |
3137 | } | |
3138 | ||
a0cbdd2e MD |
3139 | /* |
3140 | * Release our own refcount. Force channel deletion even if | |
3141 | * streams were not initialized. | |
3142 | */ | |
3143 | if (!uatomic_sub_return(&chan->refcount, 1)) { | |
3144 | consumer_del_channel(chan); | |
3145 | } | |
c7260a81 | 3146 | rcu_read_unlock(); |
a0cbdd2e MD |
3147 | goto restart; |
3148 | } | |
d8ef542d MD |
3149 | case CONSUMER_CHANNEL_QUIT: |
3150 | /* | |
3151 | * Remove the pipe from the poll set and continue the loop | |
3152 | * since their might be data to consume. | |
3153 | */ | |
3154 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
3155 | continue; | |
3156 | default: | |
3157 | ERR("Unknown action"); | |
3158 | break; | |
3159 | } | |
03e43155 MD |
3160 | } else if (revents & (LPOLLERR | LPOLLHUP)) { |
3161 | DBG("Channel thread pipe hung up"); | |
3162 | /* | |
3163 | * Remove the pipe from the poll set and continue the loop | |
3164 | * since their might be data to consume. | |
3165 | */ | |
3166 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
3167 | continue; | |
3168 | } else { | |
3169 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3170 | goto end; | |
d8ef542d MD |
3171 | } |
3172 | ||
3173 | /* Handle other stream */ | |
3174 | continue; | |
3175 | } | |
3176 | ||
3177 | rcu_read_lock(); | |
3178 | { | |
3179 | uint64_t tmp_id = (uint64_t) pollfd; | |
3180 | ||
3181 | lttng_ht_lookup(channel_ht, &tmp_id, &iter); | |
3182 | } | |
3183 | node = lttng_ht_iter_get_node_u64(&iter); | |
3184 | assert(node); | |
3185 | ||
3186 | chan = caa_container_of(node, struct lttng_consumer_channel, | |
3187 | wait_fd_node); | |
3188 | ||
3189 | /* Check for error event */ | |
3190 | if (revents & (LPOLLERR | LPOLLHUP)) { | |
3191 | DBG("Channel fd %d is hup|err.", pollfd); | |
3192 | ||
3193 | lttng_poll_del(&events, chan->wait_fd); | |
3194 | ret = lttng_ht_del(channel_ht, &iter); | |
3195 | assert(ret == 0); | |
b4a650f3 DG |
3196 | |
3197 | /* | |
3198 | * This will close the wait fd for each stream associated to | |
3199 | * this channel AND monitored by the data/metadata thread thus | |
3200 | * will be clean by the right thread. | |
3201 | */ | |
d8ef542d | 3202 | consumer_close_channel_streams(chan); |
f2ad556d MD |
3203 | |
3204 | /* Release our own refcount */ | |
3205 | if (!uatomic_sub_return(&chan->refcount, 1) | |
3206 | && !uatomic_read(&chan->nb_init_stream_left)) { | |
3207 | consumer_del_channel(chan); | |
3208 | } | |
03e43155 MD |
3209 | } else { |
3210 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
3211 | rcu_read_unlock(); | |
3212 | goto end; | |
d8ef542d MD |
3213 | } |
3214 | ||
3215 | /* Release RCU lock for the channel looked up */ | |
3216 | rcu_read_unlock(); | |
3217 | } | |
3218 | } | |
3219 | ||
1fc79fb4 MD |
3220 | /* All is OK */ |
3221 | err = 0; | |
d8ef542d MD |
3222 | end: |
3223 | lttng_poll_clean(&events); | |
3224 | end_poll: | |
3225 | destroy_channel_ht(channel_ht); | |
3226 | end_ht: | |
2d57de81 | 3227 | error_testpoint: |
d8ef542d | 3228 | DBG("Channel poll thread exiting"); |
1fc79fb4 MD |
3229 | if (err) { |
3230 | health_error(); | |
3231 | ERR("Health error occurred in %s", __func__); | |
3232 | } | |
3233 | health_unregister(health_consumerd); | |
d8ef542d MD |
3234 | rcu_unregister_thread(); |
3235 | return NULL; | |
3236 | } | |
3237 | ||
331744e3 JD |
3238 | static int set_metadata_socket(struct lttng_consumer_local_data *ctx, |
3239 | struct pollfd *sockpoll, int client_socket) | |
3240 | { | |
3241 | int ret; | |
3242 | ||
3243 | assert(ctx); | |
3244 | assert(sockpoll); | |
3245 | ||
84382d49 MD |
3246 | ret = lttng_consumer_poll_socket(sockpoll); |
3247 | if (ret) { | |
331744e3 JD |
3248 | goto error; |
3249 | } | |
3250 | DBG("Metadata connection on client_socket"); | |
3251 | ||
3252 | /* Blocking call, waiting for transmission */ | |
3253 | ctx->consumer_metadata_socket = lttcomm_accept_unix_sock(client_socket); | |
3254 | if (ctx->consumer_metadata_socket < 0) { | |
3255 | WARN("On accept metadata"); | |
3256 | ret = -1; | |
3257 | goto error; | |
3258 | } | |
3259 | ret = 0; | |
3260 | ||
3261 | error: | |
3262 | return ret; | |
3263 | } | |
3264 | ||
3bd1e081 MD |
3265 | /* |
3266 | * This thread listens on the consumerd socket and receives the file | |
3267 | * descriptors from the session daemon. | |
3268 | */ | |
7d980def | 3269 | void *consumer_thread_sessiond_poll(void *data) |
3bd1e081 | 3270 | { |
1fc79fb4 | 3271 | int sock = -1, client_socket, ret, err = -1; |
3bd1e081 MD |
3272 | /* |
3273 | * structure to poll for incoming data on communication socket avoids | |
3274 | * making blocking sockets. | |
3275 | */ | |
3276 | struct pollfd consumer_sockpoll[2]; | |
3277 | struct lttng_consumer_local_data *ctx = data; | |
3278 | ||
e7b994a3 DG |
3279 | rcu_register_thread(); |
3280 | ||
1fc79fb4 MD |
3281 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_SESSIOND); |
3282 | ||
2d57de81 MD |
3283 | if (testpoint(consumerd_thread_sessiond)) { |
3284 | goto error_testpoint; | |
3285 | } | |
3286 | ||
9ce5646a MD |
3287 | health_code_update(); |
3288 | ||
3bd1e081 MD |
3289 | DBG("Creating command socket %s", ctx->consumer_command_sock_path); |
3290 | unlink(ctx->consumer_command_sock_path); | |
3291 | client_socket = lttcomm_create_unix_sock(ctx->consumer_command_sock_path); | |
3292 | if (client_socket < 0) { | |
3293 | ERR("Cannot create command socket"); | |
3294 | goto end; | |
3295 | } | |
3296 | ||
3297 | ret = lttcomm_listen_unix_sock(client_socket); | |
3298 | if (ret < 0) { | |
3299 | goto end; | |
3300 | } | |
3301 | ||
32258573 | 3302 | DBG("Sending ready command to lttng-sessiond"); |
f73fabfd | 3303 | ret = lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_COMMAND_SOCK_READY); |
3bd1e081 MD |
3304 | /* return < 0 on error, but == 0 is not fatal */ |
3305 | if (ret < 0) { | |
32258573 | 3306 | ERR("Error sending ready command to lttng-sessiond"); |
3bd1e081 MD |
3307 | goto end; |
3308 | } | |
3309 | ||
3bd1e081 MD |
3310 | /* prepare the FDs to poll : to client socket and the should_quit pipe */ |
3311 | consumer_sockpoll[0].fd = ctx->consumer_should_quit[0]; | |
3312 | consumer_sockpoll[0].events = POLLIN | POLLPRI; | |
3313 | consumer_sockpoll[1].fd = client_socket; | |
3314 | consumer_sockpoll[1].events = POLLIN | POLLPRI; | |
3315 | ||
84382d49 MD |
3316 | ret = lttng_consumer_poll_socket(consumer_sockpoll); |
3317 | if (ret) { | |
3318 | if (ret > 0) { | |
3319 | /* should exit */ | |
3320 | err = 0; | |
3321 | } | |
3bd1e081 MD |
3322 | goto end; |
3323 | } | |
3324 | DBG("Connection on client_socket"); | |
3325 | ||
3326 | /* Blocking call, waiting for transmission */ | |
3327 | sock = lttcomm_accept_unix_sock(client_socket); | |
534d2592 | 3328 | if (sock < 0) { |
3bd1e081 MD |
3329 | WARN("On accept"); |
3330 | goto end; | |
3331 | } | |
3bd1e081 | 3332 | |
331744e3 JD |
3333 | /* |
3334 | * Setup metadata socket which is the second socket connection on the | |
3335 | * command unix socket. | |
3336 | */ | |
3337 | ret = set_metadata_socket(ctx, consumer_sockpoll, client_socket); | |
84382d49 MD |
3338 | if (ret) { |
3339 | if (ret > 0) { | |
3340 | /* should exit */ | |
3341 | err = 0; | |
3342 | } | |
331744e3 JD |
3343 | goto end; |
3344 | } | |
3345 | ||
d96f09c6 DG |
3346 | /* This socket is not useful anymore. */ |
3347 | ret = close(client_socket); | |
3348 | if (ret < 0) { | |
3349 | PERROR("close client_socket"); | |
3350 | } | |
3351 | client_socket = -1; | |
3352 | ||
3bd1e081 MD |
3353 | /* update the polling structure to poll on the established socket */ |
3354 | consumer_sockpoll[1].fd = sock; | |
3355 | consumer_sockpoll[1].events = POLLIN | POLLPRI; | |
3356 | ||
3357 | while (1) { | |
9ce5646a MD |
3358 | health_code_update(); |
3359 | ||
3360 | health_poll_entry(); | |
3361 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
3362 | health_poll_exit(); | |
84382d49 MD |
3363 | if (ret) { |
3364 | if (ret > 0) { | |
3365 | /* should exit */ | |
3366 | err = 0; | |
3367 | } | |
3bd1e081 MD |
3368 | goto end; |
3369 | } | |
3370 | DBG("Incoming command on sock"); | |
3371 | ret = lttng_consumer_recv_cmd(ctx, sock, consumer_sockpoll); | |
4cbc1a04 DG |
3372 | if (ret <= 0) { |
3373 | /* | |
3374 | * This could simply be a session daemon quitting. Don't output | |
3375 | * ERR() here. | |
3376 | */ | |
3377 | DBG("Communication interrupted on command socket"); | |
41ba6035 | 3378 | err = 0; |
3bd1e081 MD |
3379 | goto end; |
3380 | } | |
10211f5c | 3381 | if (CMM_LOAD_SHARED(consumer_quit)) { |
3bd1e081 | 3382 | DBG("consumer_thread_receive_fds received quit from signal"); |
1fc79fb4 | 3383 | err = 0; /* All is OK */ |
3bd1e081 MD |
3384 | goto end; |
3385 | } | |
ffe60014 | 3386 | DBG("received command on sock"); |
3bd1e081 | 3387 | } |
1fc79fb4 MD |
3388 | /* All is OK */ |
3389 | err = 0; | |
3390 | ||
3bd1e081 | 3391 | end: |
ffe60014 | 3392 | DBG("Consumer thread sessiond poll exiting"); |
3bd1e081 | 3393 | |
d88aee68 DG |
3394 | /* |
3395 | * Close metadata streams since the producer is the session daemon which | |
3396 | * just died. | |
3397 | * | |
3398 | * NOTE: for now, this only applies to the UST tracer. | |
3399 | */ | |
6d574024 | 3400 | lttng_consumer_close_all_metadata(); |
d88aee68 | 3401 | |
3bd1e081 MD |
3402 | /* |
3403 | * when all fds have hung up, the polling thread | |
3404 | * can exit cleanly | |
3405 | */ | |
10211f5c | 3406 | CMM_STORE_SHARED(consumer_quit, 1); |
3bd1e081 | 3407 | |
04fdd819 | 3408 | /* |
c869f647 | 3409 | * Notify the data poll thread to poll back again and test the |
8994307f | 3410 | * consumer_quit state that we just set so to quit gracefully. |
04fdd819 | 3411 | */ |
acdb9057 | 3412 | notify_thread_lttng_pipe(ctx->consumer_data_pipe); |
c869f647 | 3413 | |
a0cbdd2e | 3414 | notify_channel_pipe(ctx, NULL, -1, CONSUMER_CHANNEL_QUIT); |
d8ef542d | 3415 | |
5c635c72 MD |
3416 | notify_health_quit_pipe(health_quit_pipe); |
3417 | ||
d96f09c6 DG |
3418 | /* Cleaning up possibly open sockets. */ |
3419 | if (sock >= 0) { | |
3420 | ret = close(sock); | |
3421 | if (ret < 0) { | |
3422 | PERROR("close sock sessiond poll"); | |
3423 | } | |
3424 | } | |
3425 | if (client_socket >= 0) { | |
38476d24 | 3426 | ret = close(client_socket); |
d96f09c6 DG |
3427 | if (ret < 0) { |
3428 | PERROR("close client_socket sessiond poll"); | |
3429 | } | |
3430 | } | |
3431 | ||
2d57de81 | 3432 | error_testpoint: |
1fc79fb4 MD |
3433 | if (err) { |
3434 | health_error(); | |
3435 | ERR("Health error occurred in %s", __func__); | |
3436 | } | |
3437 | health_unregister(health_consumerd); | |
3438 | ||
e7b994a3 | 3439 | rcu_unregister_thread(); |
3bd1e081 MD |
3440 | return NULL; |
3441 | } | |
d41f73b7 | 3442 | |
4078b776 | 3443 | ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
3444 | struct lttng_consumer_local_data *ctx) |
3445 | { | |
74251bb8 DG |
3446 | ssize_t ret; |
3447 | ||
d2956687 | 3448 | pthread_mutex_lock(&stream->chan->lock); |
74251bb8 | 3449 | pthread_mutex_lock(&stream->lock); |
94d49140 JD |
3450 | if (stream->metadata_flag) { |
3451 | pthread_mutex_lock(&stream->metadata_rdv_lock); | |
3452 | } | |
74251bb8 | 3453 | |
d41f73b7 MD |
3454 | switch (consumer_data.type) { |
3455 | case LTTNG_CONSUMER_KERNEL: | |
d2956687 | 3456 | ret = lttng_kconsumer_read_subbuffer(stream, ctx); |
74251bb8 | 3457 | break; |
7753dea8 MD |
3458 | case LTTNG_CONSUMER32_UST: |
3459 | case LTTNG_CONSUMER64_UST: | |
d2956687 | 3460 | ret = lttng_ustconsumer_read_subbuffer(stream, ctx); |
74251bb8 | 3461 | break; |
d41f73b7 MD |
3462 | default: |
3463 | ERR("Unknown consumer_data type"); | |
3464 | assert(0); | |
74251bb8 DG |
3465 | ret = -ENOSYS; |
3466 | break; | |
d41f73b7 | 3467 | } |
74251bb8 | 3468 | |
94d49140 JD |
3469 | if (stream->metadata_flag) { |
3470 | pthread_cond_broadcast(&stream->metadata_rdv); | |
3471 | pthread_mutex_unlock(&stream->metadata_rdv_lock); | |
3472 | } | |
74251bb8 | 3473 | pthread_mutex_unlock(&stream->lock); |
d2956687 | 3474 | pthread_mutex_unlock(&stream->chan->lock); |
02d02e31 | 3475 | |
74251bb8 | 3476 | return ret; |
d41f73b7 MD |
3477 | } |
3478 | ||
3479 | int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
3480 | { | |
3481 | switch (consumer_data.type) { | |
3482 | case LTTNG_CONSUMER_KERNEL: | |
3483 | return lttng_kconsumer_on_recv_stream(stream); | |
7753dea8 MD |
3484 | case LTTNG_CONSUMER32_UST: |
3485 | case LTTNG_CONSUMER64_UST: | |
d41f73b7 MD |
3486 | return lttng_ustconsumer_on_recv_stream(stream); |
3487 | default: | |
3488 | ERR("Unknown consumer_data type"); | |
3489 | assert(0); | |
3490 | return -ENOSYS; | |
3491 | } | |
3492 | } | |
e4421fec DG |
3493 | |
3494 | /* | |
3495 | * Allocate and set consumer data hash tables. | |
3496 | */ | |
282dadbc | 3497 | int lttng_consumer_init(void) |
e4421fec | 3498 | { |
d88aee68 | 3499 | consumer_data.channel_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3500 | if (!consumer_data.channel_ht) { |
3501 | goto error; | |
3502 | } | |
3503 | ||
5c3892a6 JG |
3504 | consumer_data.channels_by_session_id_ht = |
3505 | lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3506 | if (!consumer_data.channels_by_session_id_ht) { | |
3507 | goto error; | |
3508 | } | |
3509 | ||
d88aee68 | 3510 | consumer_data.relayd_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3511 | if (!consumer_data.relayd_ht) { |
3512 | goto error; | |
3513 | } | |
3514 | ||
d88aee68 | 3515 | consumer_data.stream_list_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3516 | if (!consumer_data.stream_list_ht) { |
3517 | goto error; | |
3518 | } | |
3519 | ||
d8ef542d | 3520 | consumer_data.stream_per_chan_id_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
282dadbc MD |
3521 | if (!consumer_data.stream_per_chan_id_ht) { |
3522 | goto error; | |
3523 | } | |
3524 | ||
3525 | data_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3526 | if (!data_ht) { | |
3527 | goto error; | |
3528 | } | |
3529 | ||
3530 | metadata_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3531 | if (!metadata_ht) { | |
3532 | goto error; | |
3533 | } | |
3534 | ||
28cc88f3 JG |
3535 | consumer_data.chunk_registry = lttng_trace_chunk_registry_create(); |
3536 | if (!consumer_data.chunk_registry) { | |
3537 | goto error; | |
3538 | } | |
3539 | ||
282dadbc MD |
3540 | return 0; |
3541 | ||
3542 | error: | |
3543 | return -1; | |
e4421fec | 3544 | } |
7735ef9e DG |
3545 | |
3546 | /* | |
3547 | * Process the ADD_RELAYD command receive by a consumer. | |
3548 | * | |
3549 | * This will create a relayd socket pair and add it to the relayd hash table. | |
3550 | * The caller MUST acquire a RCU read side lock before calling it. | |
3551 | */ | |
2527bf85 | 3552 | void consumer_add_relayd_socket(uint64_t net_seq_idx, int sock_type, |
7735ef9e | 3553 | struct lttng_consumer_local_data *ctx, int sock, |
6151a90f | 3554 | struct pollfd *consumer_sockpoll, |
d3e2ba59 JD |
3555 | struct lttcomm_relayd_sock *relayd_sock, uint64_t sessiond_id, |
3556 | uint64_t relayd_session_id) | |
7735ef9e | 3557 | { |
cd2b09ed | 3558 | int fd = -1, ret = -1, relayd_created = 0; |
0c759fc9 | 3559 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
d4298c99 | 3560 | struct consumer_relayd_sock_pair *relayd = NULL; |
7735ef9e | 3561 | |
6151a90f JD |
3562 | assert(ctx); |
3563 | assert(relayd_sock); | |
3564 | ||
da009f2c | 3565 | DBG("Consumer adding relayd socket (idx: %" PRIu64 ")", net_seq_idx); |
7735ef9e DG |
3566 | |
3567 | /* Get relayd reference if exists. */ | |
3568 | relayd = consumer_find_relayd(net_seq_idx); | |
3569 | if (relayd == NULL) { | |
da009f2c | 3570 | assert(sock_type == LTTNG_STREAM_CONTROL); |
7735ef9e DG |
3571 | /* Not found. Allocate one. */ |
3572 | relayd = consumer_allocate_relayd_sock_pair(net_seq_idx); | |
3573 | if (relayd == NULL) { | |
618a6a28 MD |
3574 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
3575 | goto error; | |
0d08d75e | 3576 | } else { |
30319bcb | 3577 | relayd->sessiond_session_id = sessiond_id; |
0d08d75e | 3578 | relayd_created = 1; |
7735ef9e | 3579 | } |
0d08d75e DG |
3580 | |
3581 | /* | |
3582 | * This code path MUST continue to the consumer send status message to | |
3583 | * we can notify the session daemon and continue our work without | |
3584 | * killing everything. | |
3585 | */ | |
da009f2c MD |
3586 | } else { |
3587 | /* | |
3588 | * relayd key should never be found for control socket. | |
3589 | */ | |
3590 | assert(sock_type != LTTNG_STREAM_CONTROL); | |
0d08d75e DG |
3591 | } |
3592 | ||
3593 | /* First send a status message before receiving the fds. */ | |
0c759fc9 | 3594 | ret = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
618a6a28 | 3595 | if (ret < 0) { |
0d08d75e | 3596 | /* Somehow, the session daemon is not responding anymore. */ |
618a6a28 MD |
3597 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); |
3598 | goto error_nosignal; | |
7735ef9e DG |
3599 | } |
3600 | ||
3601 | /* Poll on consumer socket. */ | |
84382d49 MD |
3602 | ret = lttng_consumer_poll_socket(consumer_sockpoll); |
3603 | if (ret) { | |
3604 | /* Needing to exit in the middle of a command: error. */ | |
0d08d75e | 3605 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
618a6a28 | 3606 | goto error_nosignal; |
7735ef9e DG |
3607 | } |
3608 | ||
3609 | /* Get relayd socket from session daemon */ | |
3610 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); | |
3611 | if (ret != sizeof(fd)) { | |
4028eeb9 | 3612 | fd = -1; /* Just in case it gets set with an invalid value. */ |
0d08d75e DG |
3613 | |
3614 | /* | |
3615 | * Failing to receive FDs might indicate a major problem such as | |
3616 | * reaching a fd limit during the receive where the kernel returns a | |
3617 | * MSG_CTRUNC and fails to cleanup the fd in the queue. Any case, we | |
3618 | * don't take any chances and stop everything. | |
3619 | * | |
3620 | * XXX: Feature request #558 will fix that and avoid this possible | |
3621 | * issue when reaching the fd limit. | |
3622 | */ | |
3623 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); | |
618a6a28 | 3624 | ret_code = LTTCOMM_CONSUMERD_ERROR_RECV_FD; |
f50f23d9 DG |
3625 | goto error; |
3626 | } | |
3627 | ||
7735ef9e DG |
3628 | /* Copy socket information and received FD */ |
3629 | switch (sock_type) { | |
3630 | case LTTNG_STREAM_CONTROL: | |
3631 | /* Copy received lttcomm socket */ | |
6151a90f JD |
3632 | lttcomm_copy_sock(&relayd->control_sock.sock, &relayd_sock->sock); |
3633 | ret = lttcomm_create_sock(&relayd->control_sock.sock); | |
4028eeb9 | 3634 | /* Handle create_sock error. */ |
f66c074c | 3635 | if (ret < 0) { |
618a6a28 | 3636 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
4028eeb9 | 3637 | goto error; |
f66c074c | 3638 | } |
da009f2c MD |
3639 | /* |
3640 | * Close the socket created internally by | |
3641 | * lttcomm_create_sock, so we can replace it by the one | |
3642 | * received from sessiond. | |
3643 | */ | |
3644 | if (close(relayd->control_sock.sock.fd)) { | |
3645 | PERROR("close"); | |
3646 | } | |
7735ef9e DG |
3647 | |
3648 | /* Assign new file descriptor */ | |
6151a90f JD |
3649 | relayd->control_sock.sock.fd = fd; |
3650 | /* Assign version values. */ | |
3651 | relayd->control_sock.major = relayd_sock->major; | |
3652 | relayd->control_sock.minor = relayd_sock->minor; | |
c5b6f4f0 | 3653 | |
d3e2ba59 | 3654 | relayd->relayd_session_id = relayd_session_id; |
c5b6f4f0 | 3655 | |
7735ef9e DG |
3656 | break; |
3657 | case LTTNG_STREAM_DATA: | |
3658 | /* Copy received lttcomm socket */ | |
6151a90f JD |
3659 | lttcomm_copy_sock(&relayd->data_sock.sock, &relayd_sock->sock); |
3660 | ret = lttcomm_create_sock(&relayd->data_sock.sock); | |
4028eeb9 | 3661 | /* Handle create_sock error. */ |
f66c074c | 3662 | if (ret < 0) { |
618a6a28 | 3663 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
4028eeb9 | 3664 | goto error; |
f66c074c | 3665 | } |
da009f2c MD |
3666 | /* |
3667 | * Close the socket created internally by | |
3668 | * lttcomm_create_sock, so we can replace it by the one | |
3669 | * received from sessiond. | |
3670 | */ | |
3671 | if (close(relayd->data_sock.sock.fd)) { | |
3672 | PERROR("close"); | |
3673 | } | |
7735ef9e DG |
3674 | |
3675 | /* Assign new file descriptor */ | |
6151a90f JD |
3676 | relayd->data_sock.sock.fd = fd; |
3677 | /* Assign version values. */ | |
3678 | relayd->data_sock.major = relayd_sock->major; | |
3679 | relayd->data_sock.minor = relayd_sock->minor; | |
7735ef9e DG |
3680 | break; |
3681 | default: | |
3682 | ERR("Unknown relayd socket type (%d)", sock_type); | |
618a6a28 | 3683 | ret_code = LTTCOMM_CONSUMERD_FATAL; |
7735ef9e DG |
3684 | goto error; |
3685 | } | |
3686 | ||
d88aee68 | 3687 | DBG("Consumer %s socket created successfully with net idx %" PRIu64 " (fd: %d)", |
7735ef9e DG |
3688 | sock_type == LTTNG_STREAM_CONTROL ? "control" : "data", |
3689 | relayd->net_seq_idx, fd); | |
39d9954c FD |
3690 | /* |
3691 | * We gave the ownership of the fd to the relayd structure. Set the | |
3692 | * fd to -1 so we don't call close() on it in the error path below. | |
3693 | */ | |
3694 | fd = -1; | |
7735ef9e | 3695 | |
618a6a28 MD |
3696 | /* We successfully added the socket. Send status back. */ |
3697 | ret = consumer_send_status_msg(sock, ret_code); | |
3698 | if (ret < 0) { | |
3699 | /* Somehow, the session daemon is not responding anymore. */ | |
3700 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); | |
3701 | goto error_nosignal; | |
3702 | } | |
3703 | ||
7735ef9e DG |
3704 | /* |
3705 | * Add relayd socket pair to consumer data hashtable. If object already | |
3706 | * exists or on error, the function gracefully returns. | |
3707 | */ | |
9276e5c8 | 3708 | relayd->ctx = ctx; |
d09e1200 | 3709 | add_relayd(relayd); |
7735ef9e DG |
3710 | |
3711 | /* All good! */ | |
2527bf85 | 3712 | return; |
7735ef9e DG |
3713 | |
3714 | error: | |
618a6a28 MD |
3715 | if (consumer_send_status_msg(sock, ret_code) < 0) { |
3716 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); | |
3717 | } | |
3718 | ||
3719 | error_nosignal: | |
4028eeb9 DG |
3720 | /* Close received socket if valid. */ |
3721 | if (fd >= 0) { | |
3722 | if (close(fd)) { | |
3723 | PERROR("close received socket"); | |
3724 | } | |
3725 | } | |
cd2b09ed DG |
3726 | |
3727 | if (relayd_created) { | |
cd2b09ed DG |
3728 | free(relayd); |
3729 | } | |
7735ef9e | 3730 | } |
ca22feea | 3731 | |
f7079f67 DG |
3732 | /* |
3733 | * Search for a relayd associated to the session id and return the reference. | |
3734 | * | |
3735 | * A rcu read side lock MUST be acquire before calling this function and locked | |
3736 | * until the relayd object is no longer necessary. | |
3737 | */ | |
3738 | static struct consumer_relayd_sock_pair *find_relayd_by_session_id(uint64_t id) | |
3739 | { | |
3740 | struct lttng_ht_iter iter; | |
f7079f67 | 3741 | struct consumer_relayd_sock_pair *relayd = NULL; |
f7079f67 DG |
3742 | |
3743 | /* Iterate over all relayd since they are indexed by net_seq_idx. */ | |
3744 | cds_lfht_for_each_entry(consumer_data.relayd_ht->ht, &iter.iter, relayd, | |
3745 | node.node) { | |
18261bd1 DG |
3746 | /* |
3747 | * Check by sessiond id which is unique here where the relayd session | |
3748 | * id might not be when having multiple relayd. | |
3749 | */ | |
3750 | if (relayd->sessiond_session_id == id) { | |
f7079f67 | 3751 | /* Found the relayd. There can be only one per id. */ |
18261bd1 | 3752 | goto found; |
f7079f67 DG |
3753 | } |
3754 | } | |
3755 | ||
18261bd1 DG |
3756 | return NULL; |
3757 | ||
3758 | found: | |
f7079f67 DG |
3759 | return relayd; |
3760 | } | |
3761 | ||
ca22feea DG |
3762 | /* |
3763 | * Check if for a given session id there is still data needed to be extract | |
3764 | * from the buffers. | |
3765 | * | |
6d805429 | 3766 | * Return 1 if data is pending or else 0 meaning ready to be read. |
ca22feea | 3767 | */ |
6d805429 | 3768 | int consumer_data_pending(uint64_t id) |
ca22feea DG |
3769 | { |
3770 | int ret; | |
3771 | struct lttng_ht_iter iter; | |
3772 | struct lttng_ht *ht; | |
3773 | struct lttng_consumer_stream *stream; | |
f7079f67 | 3774 | struct consumer_relayd_sock_pair *relayd = NULL; |
6d805429 | 3775 | int (*data_pending)(struct lttng_consumer_stream *); |
ca22feea | 3776 | |
6d805429 | 3777 | DBG("Consumer data pending command on session id %" PRIu64, id); |
ca22feea | 3778 | |
6f6eda74 | 3779 | rcu_read_lock(); |
ca22feea DG |
3780 | pthread_mutex_lock(&consumer_data.lock); |
3781 | ||
3782 | switch (consumer_data.type) { | |
3783 | case LTTNG_CONSUMER_KERNEL: | |
6d805429 | 3784 | data_pending = lttng_kconsumer_data_pending; |
ca22feea DG |
3785 | break; |
3786 | case LTTNG_CONSUMER32_UST: | |
3787 | case LTTNG_CONSUMER64_UST: | |
6d805429 | 3788 | data_pending = lttng_ustconsumer_data_pending; |
ca22feea DG |
3789 | break; |
3790 | default: | |
3791 | ERR("Unknown consumer data type"); | |
3792 | assert(0); | |
3793 | } | |
3794 | ||
3795 | /* Ease our life a bit */ | |
3796 | ht = consumer_data.stream_list_ht; | |
3797 | ||
c8f59ee5 | 3798 | cds_lfht_for_each_entry_duplicate(ht->ht, |
d88aee68 DG |
3799 | ht->hash_fct(&id, lttng_ht_seed), |
3800 | ht->match_fct, &id, | |
ca22feea | 3801 | &iter.iter, stream, node_session_id.node) { |
bb586a6e | 3802 | pthread_mutex_lock(&stream->lock); |
ca22feea | 3803 | |
4e9a4686 DG |
3804 | /* |
3805 | * A removed node from the hash table indicates that the stream has | |
3806 | * been deleted thus having a guarantee that the buffers are closed | |
3807 | * on the consumer side. However, data can still be transmitted | |
3808 | * over the network so don't skip the relayd check. | |
3809 | */ | |
3810 | ret = cds_lfht_is_node_deleted(&stream->node.node); | |
3811 | if (!ret) { | |
3812 | /* Check the stream if there is data in the buffers. */ | |
6d805429 DG |
3813 | ret = data_pending(stream); |
3814 | if (ret == 1) { | |
4e9a4686 | 3815 | pthread_mutex_unlock(&stream->lock); |
f7079f67 | 3816 | goto data_pending; |
4e9a4686 DG |
3817 | } |
3818 | } | |
3819 | ||
d9f0c7c7 JR |
3820 | pthread_mutex_unlock(&stream->lock); |
3821 | } | |
3822 | ||
3823 | relayd = find_relayd_by_session_id(id); | |
3824 | if (relayd) { | |
3825 | unsigned int is_data_inflight = 0; | |
3826 | ||
3827 | /* Send init command for data pending. */ | |
3828 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
3829 | ret = relayd_begin_data_pending(&relayd->control_sock, | |
3830 | relayd->relayd_session_id); | |
3831 | if (ret < 0) { | |
3832 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
3833 | /* Communication error thus the relayd so no data pending. */ | |
3834 | goto data_not_pending; | |
3835 | } | |
3836 | ||
3837 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
3838 | ht->hash_fct(&id, lttng_ht_seed), | |
3839 | ht->match_fct, &id, | |
3840 | &iter.iter, stream, node_session_id.node) { | |
c8f59ee5 | 3841 | if (stream->metadata_flag) { |
ad7051c0 DG |
3842 | ret = relayd_quiescent_control(&relayd->control_sock, |
3843 | stream->relayd_stream_id); | |
c8f59ee5 | 3844 | } else { |
6d805429 | 3845 | ret = relayd_data_pending(&relayd->control_sock, |
39df6d9f DG |
3846 | stream->relayd_stream_id, |
3847 | stream->next_net_seq_num - 1); | |
c8f59ee5 | 3848 | } |
d9f0c7c7 JR |
3849 | |
3850 | if (ret == 1) { | |
3851 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
3852 | goto data_pending; | |
3853 | } else if (ret < 0) { | |
9276e5c8 JR |
3854 | ERR("Relayd data pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
3855 | lttng_consumer_cleanup_relayd(relayd); | |
3856 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
9276e5c8 JR |
3857 | goto data_not_pending; |
3858 | } | |
c8f59ee5 | 3859 | } |
f7079f67 | 3860 | |
d9f0c7c7 | 3861 | /* Send end command for data pending. */ |
f7079f67 DG |
3862 | ret = relayd_end_data_pending(&relayd->control_sock, |
3863 | relayd->relayd_session_id, &is_data_inflight); | |
3864 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
bdd88757 | 3865 | if (ret < 0) { |
9276e5c8 JR |
3866 | ERR("Relayd end data pending failed. Cleaning up relayd %" PRIu64".", relayd->net_seq_idx); |
3867 | lttng_consumer_cleanup_relayd(relayd); | |
f7079f67 DG |
3868 | goto data_not_pending; |
3869 | } | |
bdd88757 DG |
3870 | if (is_data_inflight) { |
3871 | goto data_pending; | |
3872 | } | |
f7079f67 DG |
3873 | } |
3874 | ||
ca22feea | 3875 | /* |
f7079f67 DG |
3876 | * Finding _no_ node in the hash table and no inflight data means that the |
3877 | * stream(s) have been removed thus data is guaranteed to be available for | |
3878 | * analysis from the trace files. | |
ca22feea DG |
3879 | */ |
3880 | ||
f7079f67 | 3881 | data_not_pending: |
ca22feea DG |
3882 | /* Data is available to be read by a viewer. */ |
3883 | pthread_mutex_unlock(&consumer_data.lock); | |
c8f59ee5 | 3884 | rcu_read_unlock(); |
6d805429 | 3885 | return 0; |
ca22feea | 3886 | |
f7079f67 | 3887 | data_pending: |
ca22feea DG |
3888 | /* Data is still being extracted from buffers. */ |
3889 | pthread_mutex_unlock(&consumer_data.lock); | |
c8f59ee5 | 3890 | rcu_read_unlock(); |
6d805429 | 3891 | return 1; |
ca22feea | 3892 | } |
f50f23d9 DG |
3893 | |
3894 | /* | |
3895 | * Send a ret code status message to the sessiond daemon. | |
3896 | * | |
3897 | * Return the sendmsg() return value. | |
3898 | */ | |
3899 | int consumer_send_status_msg(int sock, int ret_code) | |
3900 | { | |
3901 | struct lttcomm_consumer_status_msg msg; | |
3902 | ||
53efb85a | 3903 | memset(&msg, 0, sizeof(msg)); |
f50f23d9 DG |
3904 | msg.ret_code = ret_code; |
3905 | ||
3906 | return lttcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
3907 | } | |
ffe60014 DG |
3908 | |
3909 | /* | |
3910 | * Send a channel status message to the sessiond daemon. | |
3911 | * | |
3912 | * Return the sendmsg() return value. | |
3913 | */ | |
3914 | int consumer_send_status_channel(int sock, | |
3915 | struct lttng_consumer_channel *channel) | |
3916 | { | |
3917 | struct lttcomm_consumer_status_channel msg; | |
3918 | ||
3919 | assert(sock >= 0); | |
3920 | ||
53efb85a | 3921 | memset(&msg, 0, sizeof(msg)); |
ffe60014 | 3922 | if (!channel) { |
0c759fc9 | 3923 | msg.ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; |
ffe60014 | 3924 | } else { |
0c759fc9 | 3925 | msg.ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
ffe60014 DG |
3926 | msg.key = channel->key; |
3927 | msg.stream_count = channel->streams.count; | |
3928 | } | |
3929 | ||
3930 | return lttcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
3931 | } | |
5c786ded | 3932 | |
d07ceecd MD |
3933 | unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos, |
3934 | unsigned long produced_pos, uint64_t nb_packets_per_stream, | |
3935 | uint64_t max_sb_size) | |
5c786ded | 3936 | { |
d07ceecd | 3937 | unsigned long start_pos; |
5c786ded | 3938 | |
d07ceecd MD |
3939 | if (!nb_packets_per_stream) { |
3940 | return consumed_pos; /* Grab everything */ | |
3941 | } | |
3942 | start_pos = produced_pos - offset_align_floor(produced_pos, max_sb_size); | |
3943 | start_pos -= max_sb_size * nb_packets_per_stream; | |
3944 | if ((long) (start_pos - consumed_pos) < 0) { | |
3945 | return consumed_pos; /* Grab everything */ | |
3946 | } | |
3947 | return start_pos; | |
5c786ded | 3948 | } |
a1ae2ea5 | 3949 | |
b99a8d42 JD |
3950 | static |
3951 | int consumer_flush_buffer(struct lttng_consumer_stream *stream, int producer_active) | |
3952 | { | |
3953 | int ret = 0; | |
3954 | ||
3955 | switch (consumer_data.type) { | |
3956 | case LTTNG_CONSUMER_KERNEL: | |
5416a504 MD |
3957 | if (producer_active) { |
3958 | ret = kernctl_buffer_flush(stream->wait_fd); | |
3959 | if (ret < 0) { | |
3960 | ERR("Failed to flush kernel stream"); | |
3961 | goto end; | |
3962 | } | |
3963 | } else { | |
3964 | ret = kernctl_buffer_flush_empty(stream->wait_fd); | |
3965 | if (ret < 0) { | |
3966 | ERR("Failed to flush kernel stream"); | |
3967 | goto end; | |
3968 | } | |
b99a8d42 JD |
3969 | } |
3970 | break; | |
3971 | case LTTNG_CONSUMER32_UST: | |
3972 | case LTTNG_CONSUMER64_UST: | |
5416a504 | 3973 | lttng_ustconsumer_flush_buffer(stream, producer_active); |
b99a8d42 JD |
3974 | break; |
3975 | default: | |
3976 | ERR("Unknown consumer_data type"); | |
3977 | abort(); | |
3978 | } | |
3979 | ||
3980 | end: | |
3981 | return ret; | |
3982 | } | |
3983 | ||
3984 | /* | |
3985 | * Sample the rotate position for all the streams of a channel. If a stream | |
3986 | * is already at the rotate position (produced == consumed), we flag it as | |
3987 | * ready for rotation. The rotation of ready streams occurs after we have | |
3988 | * replied to the session daemon that we have finished sampling the positions. | |
92b7a7f8 | 3989 | * Must be called with RCU read-side lock held to ensure existence of channel. |
b99a8d42 JD |
3990 | * |
3991 | * Returns 0 on success, < 0 on error | |
3992 | */ | |
92b7a7f8 | 3993 | int lttng_consumer_rotate_channel(struct lttng_consumer_channel *channel, |
d2956687 | 3994 | uint64_t key, uint64_t relayd_id, uint32_t metadata, |
b99a8d42 JD |
3995 | struct lttng_consumer_local_data *ctx) |
3996 | { | |
3997 | int ret; | |
b99a8d42 JD |
3998 | struct lttng_consumer_stream *stream; |
3999 | struct lttng_ht_iter iter; | |
4000 | struct lttng_ht *ht = consumer_data.stream_per_chan_id_ht; | |
c35f9726 JG |
4001 | struct lttng_dynamic_array stream_rotation_positions; |
4002 | uint64_t next_chunk_id, stream_count = 0; | |
4003 | enum lttng_trace_chunk_status chunk_status; | |
4004 | const bool is_local_trace = relayd_id == -1ULL; | |
4005 | struct consumer_relayd_sock_pair *relayd = NULL; | |
4006 | bool rotating_to_new_chunk = true; | |
b99a8d42 JD |
4007 | |
4008 | DBG("Consumer sample rotate position for channel %" PRIu64, key); | |
4009 | ||
c35f9726 JG |
4010 | lttng_dynamic_array_init(&stream_rotation_positions, |
4011 | sizeof(struct relayd_stream_rotation_position), NULL); | |
4012 | ||
b99a8d42 JD |
4013 | rcu_read_lock(); |
4014 | ||
b99a8d42 | 4015 | pthread_mutex_lock(&channel->lock); |
c35f9726 JG |
4016 | assert(channel->trace_chunk); |
4017 | chunk_status = lttng_trace_chunk_get_id(channel->trace_chunk, | |
4018 | &next_chunk_id); | |
4019 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4020 | ret = -1; | |
4021 | goto end_unlock_channel; | |
4022 | } | |
b99a8d42 JD |
4023 | |
4024 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
4025 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
4026 | ht->match_fct, &channel->key, &iter.iter, | |
4027 | stream, node_channel_id.node) { | |
a40a503f | 4028 | unsigned long produced_pos = 0, consumed_pos = 0; |
b99a8d42 JD |
4029 | |
4030 | health_code_update(); | |
4031 | ||
4032 | /* | |
4033 | * Lock stream because we are about to change its state. | |
4034 | */ | |
4035 | pthread_mutex_lock(&stream->lock); | |
4036 | ||
c35f9726 JG |
4037 | if (stream->trace_chunk == stream->chan->trace_chunk) { |
4038 | rotating_to_new_chunk = false; | |
4039 | } | |
4040 | ||
a40a503f | 4041 | /* |
a9dde553 MD |
4042 | * Do not flush an empty packet when rotating from a NULL trace |
4043 | * chunk. The stream has no means to output data, and the prior | |
4044 | * rotation which rotated to NULL performed that side-effect already. | |
a40a503f | 4045 | */ |
a9dde553 MD |
4046 | if (stream->trace_chunk) { |
4047 | /* | |
4048 | * For metadata stream, do an active flush, which does not | |
4049 | * produce empty packets. For data streams, empty-flush; | |
4050 | * ensures we have at least one packet in each stream per trace | |
4051 | * chunk, even if no data was produced. | |
4052 | */ | |
4053 | ret = consumer_flush_buffer(stream, stream->metadata_flag ? 1 : 0); | |
4054 | if (ret < 0) { | |
4055 | ERR("Failed to flush stream %" PRIu64 " during channel rotation", | |
4056 | stream->key); | |
4057 | goto end_unlock_stream; | |
4058 | } | |
b99a8d42 JD |
4059 | } |
4060 | ||
a40a503f MD |
4061 | ret = lttng_consumer_take_snapshot(stream); |
4062 | if (ret < 0 && ret != -ENODATA && ret != -EAGAIN) { | |
4063 | ERR("Failed to sample snapshot position during channel rotation"); | |
b99a8d42 JD |
4064 | goto end_unlock_stream; |
4065 | } | |
a40a503f MD |
4066 | if (!ret) { |
4067 | ret = lttng_consumer_get_produced_snapshot(stream, | |
4068 | &produced_pos); | |
4069 | if (ret < 0) { | |
4070 | ERR("Failed to sample produced position during channel rotation"); | |
4071 | goto end_unlock_stream; | |
4072 | } | |
b99a8d42 | 4073 | |
a40a503f MD |
4074 | ret = lttng_consumer_get_consumed_snapshot(stream, |
4075 | &consumed_pos); | |
4076 | if (ret < 0) { | |
4077 | ERR("Failed to sample consumed position during channel rotation"); | |
4078 | goto end_unlock_stream; | |
4079 | } | |
4080 | } | |
4081 | /* | |
4082 | * Align produced position on the start-of-packet boundary of the first | |
4083 | * packet going into the next trace chunk. | |
4084 | */ | |
4085 | produced_pos = ALIGN_FLOOR(produced_pos, stream->max_sb_size); | |
4086 | if (consumed_pos == produced_pos) { | |
f8528c7a MD |
4087 | DBG("Set rotate ready for stream %" PRIu64 " produced = %lu consumed = %lu", |
4088 | stream->key, produced_pos, consumed_pos); | |
b99a8d42 | 4089 | stream->rotate_ready = true; |
f8528c7a MD |
4090 | } else { |
4091 | DBG("Different consumed and produced positions " | |
4092 | "for stream %" PRIu64 " produced = %lu consumed = %lu", | |
4093 | stream->key, produced_pos, consumed_pos); | |
b99a8d42 | 4094 | } |
633d0182 | 4095 | /* |
a40a503f MD |
4096 | * The rotation position is based on the packet_seq_num of the |
4097 | * packet following the last packet that was consumed for this | |
4098 | * stream, incremented by the offset between produced and | |
4099 | * consumed positions. This rotation position is a lower bound | |
4100 | * (inclusive) at which the next trace chunk starts. Since it | |
4101 | * is a lower bound, it is OK if the packet_seq_num does not | |
4102 | * correspond exactly to the same packet identified by the | |
4103 | * consumed_pos, which can happen in overwrite mode. | |
633d0182 | 4104 | */ |
a40a503f MD |
4105 | if (stream->sequence_number_unavailable) { |
4106 | /* | |
4107 | * Rotation should never be performed on a session which | |
4108 | * interacts with a pre-2.8 lttng-modules, which does | |
4109 | * not implement packet sequence number. | |
4110 | */ | |
4111 | ERR("Failure to rotate stream %" PRIu64 ": sequence number unavailable", | |
b99a8d42 | 4112 | stream->key); |
a40a503f | 4113 | ret = -1; |
b99a8d42 JD |
4114 | goto end_unlock_stream; |
4115 | } | |
a40a503f MD |
4116 | stream->rotate_position = stream->last_sequence_number + 1 + |
4117 | ((produced_pos - consumed_pos) / stream->max_sb_size); | |
f8528c7a MD |
4118 | DBG("Set rotation position for stream %" PRIu64 " at position %" PRIu64, |
4119 | stream->key, stream->rotate_position); | |
b99a8d42 | 4120 | |
c35f9726 | 4121 | if (!is_local_trace) { |
633d0182 JG |
4122 | /* |
4123 | * The relay daemon control protocol expects a rotation | |
4124 | * position as "the sequence number of the first packet | |
a40a503f | 4125 | * _after_ the current trace chunk". |
633d0182 | 4126 | */ |
c35f9726 JG |
4127 | const struct relayd_stream_rotation_position position = { |
4128 | .stream_id = stream->relayd_stream_id, | |
a40a503f | 4129 | .rotate_at_seq_num = stream->rotate_position, |
c35f9726 JG |
4130 | }; |
4131 | ||
4132 | ret = lttng_dynamic_array_add_element( | |
4133 | &stream_rotation_positions, | |
4134 | &position); | |
4135 | if (ret) { | |
4136 | ERR("Failed to allocate stream rotation position"); | |
4137 | goto end_unlock_stream; | |
4138 | } | |
4139 | stream_count++; | |
4140 | } | |
b99a8d42 JD |
4141 | pthread_mutex_unlock(&stream->lock); |
4142 | } | |
c35f9726 | 4143 | stream = NULL; |
b99a8d42 JD |
4144 | pthread_mutex_unlock(&channel->lock); |
4145 | ||
c35f9726 JG |
4146 | if (is_local_trace) { |
4147 | ret = 0; | |
4148 | goto end; | |
4149 | } | |
4150 | ||
4151 | relayd = consumer_find_relayd(relayd_id); | |
4152 | if (!relayd) { | |
4153 | ERR("Failed to find relayd %" PRIu64, relayd_id); | |
4154 | ret = -1; | |
4155 | goto end; | |
4156 | } | |
4157 | ||
4158 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
4159 | ret = relayd_rotate_streams(&relayd->control_sock, stream_count, | |
4160 | rotating_to_new_chunk ? &next_chunk_id : NULL, | |
4161 | (const struct relayd_stream_rotation_position *) | |
4162 | stream_rotation_positions.buffer.data); | |
4163 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
4164 | if (ret < 0) { | |
4165 | ERR("Relayd rotate stream failed. Cleaning up relayd %" PRIu64, | |
4166 | relayd->net_seq_idx); | |
4167 | lttng_consumer_cleanup_relayd(relayd); | |
4168 | goto end; | |
4169 | } | |
4170 | ||
b99a8d42 JD |
4171 | ret = 0; |
4172 | goto end; | |
4173 | ||
4174 | end_unlock_stream: | |
4175 | pthread_mutex_unlock(&stream->lock); | |
c35f9726 | 4176 | end_unlock_channel: |
b99a8d42 JD |
4177 | pthread_mutex_unlock(&channel->lock); |
4178 | end: | |
4179 | rcu_read_unlock(); | |
c35f9726 | 4180 | lttng_dynamic_array_reset(&stream_rotation_positions); |
b99a8d42 JD |
4181 | return ret; |
4182 | } | |
4183 | ||
5f3aff8b MD |
4184 | static |
4185 | int consumer_clear_buffer(struct lttng_consumer_stream *stream) | |
4186 | { | |
4187 | int ret = 0; | |
4188 | unsigned long consumed_pos_before, consumed_pos_after; | |
4189 | ||
4190 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
4191 | if (ret < 0) { | |
4192 | ERR("Taking snapshot positions"); | |
4193 | goto end; | |
4194 | } | |
4195 | ||
4196 | ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos_before); | |
4197 | if (ret < 0) { | |
4198 | ERR("Consumed snapshot position"); | |
4199 | goto end; | |
4200 | } | |
4201 | ||
4202 | switch (consumer_data.type) { | |
4203 | case LTTNG_CONSUMER_KERNEL: | |
4204 | ret = kernctl_buffer_clear(stream->wait_fd); | |
4205 | if (ret < 0) { | |
4206 | ERR("Failed to flush kernel stream"); | |
4207 | goto end; | |
4208 | } | |
4209 | break; | |
4210 | case LTTNG_CONSUMER32_UST: | |
4211 | case LTTNG_CONSUMER64_UST: | |
4212 | lttng_ustconsumer_clear_buffer(stream); | |
4213 | break; | |
4214 | default: | |
4215 | ERR("Unknown consumer_data type"); | |
4216 | abort(); | |
4217 | } | |
4218 | ||
4219 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
4220 | if (ret < 0) { | |
4221 | ERR("Taking snapshot positions"); | |
4222 | goto end; | |
4223 | } | |
4224 | ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos_after); | |
4225 | if (ret < 0) { | |
4226 | ERR("Consumed snapshot position"); | |
4227 | goto end; | |
4228 | } | |
4229 | DBG("clear: before: %lu after: %lu", consumed_pos_before, consumed_pos_after); | |
4230 | end: | |
4231 | return ret; | |
4232 | } | |
4233 | ||
4234 | static | |
4235 | int consumer_clear_stream(struct lttng_consumer_stream *stream) | |
4236 | { | |
4237 | int ret; | |
4238 | ||
4239 | ret = consumer_flush_buffer(stream, 1); | |
4240 | if (ret < 0) { | |
4241 | ERR("Failed to flush stream %" PRIu64 " during channel clear", | |
4242 | stream->key); | |
4243 | ret = LTTCOMM_CONSUMERD_FATAL; | |
4244 | goto error; | |
4245 | } | |
4246 | ||
4247 | ret = consumer_clear_buffer(stream); | |
4248 | if (ret < 0) { | |
4249 | ERR("Failed to clear stream %" PRIu64 " during channel clear", | |
4250 | stream->key); | |
4251 | ret = LTTCOMM_CONSUMERD_FATAL; | |
4252 | goto error; | |
4253 | } | |
4254 | ||
4255 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
4256 | error: | |
4257 | return ret; | |
4258 | } | |
4259 | ||
4260 | static | |
4261 | int consumer_clear_unmonitored_channel(struct lttng_consumer_channel *channel) | |
4262 | { | |
4263 | int ret; | |
4264 | struct lttng_consumer_stream *stream; | |
4265 | ||
4266 | rcu_read_lock(); | |
4267 | pthread_mutex_lock(&channel->lock); | |
4268 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { | |
4269 | health_code_update(); | |
4270 | pthread_mutex_lock(&stream->lock); | |
4271 | ret = consumer_clear_stream(stream); | |
4272 | if (ret) { | |
4273 | goto error_unlock; | |
4274 | } | |
4275 | pthread_mutex_unlock(&stream->lock); | |
4276 | } | |
4277 | pthread_mutex_unlock(&channel->lock); | |
4278 | rcu_read_unlock(); | |
4279 | return 0; | |
4280 | ||
4281 | error_unlock: | |
4282 | pthread_mutex_unlock(&stream->lock); | |
4283 | pthread_mutex_unlock(&channel->lock); | |
4284 | rcu_read_unlock(); | |
4285 | if (ret) { | |
4286 | goto error; | |
4287 | } | |
4288 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
4289 | error: | |
4290 | return ret; | |
4291 | } | |
4292 | ||
02d02e31 JD |
4293 | /* |
4294 | * Check if a stream is ready to be rotated after extracting it. | |
4295 | * | |
4296 | * Return 1 if it is ready for rotation, 0 if it is not, a negative value on | |
4297 | * error. Stream lock must be held. | |
4298 | */ | |
4299 | int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream) | |
4300 | { | |
f8528c7a MD |
4301 | DBG("Check is rotate ready for stream %" PRIu64 |
4302 | " ready %u rotate_position %" PRIu64 | |
4303 | " last_sequence_number %" PRIu64, | |
4304 | stream->key, stream->rotate_ready, | |
4305 | stream->rotate_position, stream->last_sequence_number); | |
02d02e31 | 4306 | if (stream->rotate_ready) { |
a40a503f | 4307 | return 1; |
02d02e31 JD |
4308 | } |
4309 | ||
4310 | /* | |
a40a503f MD |
4311 | * If packet seq num is unavailable, it means we are interacting |
4312 | * with a pre-2.8 lttng-modules which does not implement the | |
4313 | * sequence number. Rotation should never be used by sessiond in this | |
4314 | * scenario. | |
02d02e31 | 4315 | */ |
a40a503f MD |
4316 | if (stream->sequence_number_unavailable) { |
4317 | ERR("Internal error: rotation used on stream %" PRIu64 | |
4318 | " with unavailable sequence number", | |
4319 | stream->key); | |
4320 | return -1; | |
02d02e31 JD |
4321 | } |
4322 | ||
a40a503f MD |
4323 | if (stream->rotate_position == -1ULL || |
4324 | stream->last_sequence_number == -1ULL) { | |
4325 | return 0; | |
02d02e31 JD |
4326 | } |
4327 | ||
a40a503f MD |
4328 | /* |
4329 | * Rotate position not reached yet. The stream rotate position is | |
4330 | * the position of the next packet belonging to the next trace chunk, | |
4331 | * but consumerd considers rotation ready when reaching the last | |
4332 | * packet of the current chunk, hence the "rotate_position - 1". | |
4333 | */ | |
f8528c7a MD |
4334 | |
4335 | DBG("Check is rotate ready for stream %" PRIu64 | |
4336 | " last_sequence_number %" PRIu64 | |
4337 | " rotate_position %" PRIu64, | |
4338 | stream->key, stream->last_sequence_number, | |
4339 | stream->rotate_position); | |
a40a503f MD |
4340 | if (stream->last_sequence_number >= stream->rotate_position - 1) { |
4341 | return 1; | |
02d02e31 | 4342 | } |
02d02e31 | 4343 | |
a40a503f | 4344 | return 0; |
02d02e31 JD |
4345 | } |
4346 | ||
d73bf3d7 JD |
4347 | /* |
4348 | * Reset the state for a stream after a rotation occurred. | |
4349 | */ | |
4350 | void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream *stream) | |
4351 | { | |
f8528c7a MD |
4352 | DBG("lttng_consumer_reset_stream_rotate_state for stream %" PRIu64, |
4353 | stream->key); | |
a40a503f | 4354 | stream->rotate_position = -1ULL; |
d73bf3d7 JD |
4355 | stream->rotate_ready = false; |
4356 | } | |
4357 | ||
4358 | /* | |
4359 | * Perform the rotation a local stream file. | |
4360 | */ | |
d2956687 | 4361 | static |
d73bf3d7 JD |
4362 | int rotate_local_stream(struct lttng_consumer_local_data *ctx, |
4363 | struct lttng_consumer_stream *stream) | |
4364 | { | |
d2956687 | 4365 | int ret = 0; |
d73bf3d7 | 4366 | |
d2956687 | 4367 | DBG("Rotate local stream: stream key %" PRIu64 ", channel key %" PRIu64, |
d73bf3d7 | 4368 | stream->key, |
d2956687 | 4369 | stream->chan->key); |
d73bf3d7 | 4370 | stream->tracefile_size_current = 0; |
d2956687 | 4371 | stream->tracefile_count_current = 0; |
d73bf3d7 | 4372 | |
d2956687 JG |
4373 | if (stream->out_fd >= 0) { |
4374 | ret = close(stream->out_fd); | |
4375 | if (ret) { | |
4376 | PERROR("Failed to close stream out_fd of channel \"%s\"", | |
4377 | stream->chan->name); | |
4378 | } | |
4379 | stream->out_fd = -1; | |
4380 | } | |
d73bf3d7 | 4381 | |
d2956687 | 4382 | if (stream->index_file) { |
d73bf3d7 | 4383 | lttng_index_file_put(stream->index_file); |
d2956687 | 4384 | stream->index_file = NULL; |
d73bf3d7 JD |
4385 | } |
4386 | ||
d2956687 JG |
4387 | if (!stream->trace_chunk) { |
4388 | goto end; | |
4389 | } | |
d73bf3d7 | 4390 | |
d2956687 | 4391 | ret = consumer_stream_create_output_files(stream, true); |
d73bf3d7 JD |
4392 | end: |
4393 | return ret; | |
d73bf3d7 JD |
4394 | } |
4395 | ||
d73bf3d7 JD |
4396 | /* |
4397 | * Performs the stream rotation for the rotate session feature if needed. | |
d2956687 | 4398 | * It must be called with the channel and stream locks held. |
d73bf3d7 JD |
4399 | * |
4400 | * Return 0 on success, a negative number of error. | |
4401 | */ | |
4402 | int lttng_consumer_rotate_stream(struct lttng_consumer_local_data *ctx, | |
d2956687 | 4403 | struct lttng_consumer_stream *stream) |
d73bf3d7 JD |
4404 | { |
4405 | int ret; | |
4406 | ||
4407 | DBG("Consumer rotate stream %" PRIu64, stream->key); | |
4408 | ||
d2956687 JG |
4409 | /* |
4410 | * Update the stream's 'current' chunk to the session's (channel) | |
4411 | * now-current chunk. | |
4412 | */ | |
4413 | lttng_trace_chunk_put(stream->trace_chunk); | |
4414 | if (stream->chan->trace_chunk == stream->trace_chunk) { | |
4415 | /* | |
4416 | * A channel can be rotated and not have a "next" chunk | |
4417 | * to transition to. In that case, the channel's "current chunk" | |
4418 | * has not been closed yet, but it has not been updated to | |
4419 | * a "next" trace chunk either. Hence, the stream, like its | |
4420 | * parent channel, becomes part of no chunk and can't output | |
4421 | * anything until a new trace chunk is created. | |
4422 | */ | |
4423 | stream->trace_chunk = NULL; | |
4424 | } else if (stream->chan->trace_chunk && | |
4425 | !lttng_trace_chunk_get(stream->chan->trace_chunk)) { | |
4426 | ERR("Failed to acquire a reference to channel's trace chunk during stream rotation"); | |
4427 | ret = -1; | |
4428 | goto error; | |
4429 | } else { | |
4430 | /* | |
4431 | * Update the stream's trace chunk to its parent channel's | |
4432 | * current trace chunk. | |
4433 | */ | |
4434 | stream->trace_chunk = stream->chan->trace_chunk; | |
4435 | } | |
4436 | ||
c35f9726 | 4437 | if (stream->net_seq_idx == (uint64_t) -1ULL) { |
d73bf3d7 | 4438 | ret = rotate_local_stream(ctx, stream); |
c35f9726 JG |
4439 | if (ret < 0) { |
4440 | ERR("Failed to rotate stream, ret = %i", ret); | |
4441 | goto error; | |
4442 | } | |
d73bf3d7 JD |
4443 | } |
4444 | ||
d2956687 JG |
4445 | if (stream->metadata_flag && stream->trace_chunk) { |
4446 | /* | |
4447 | * If the stream has transitioned to a new trace | |
4448 | * chunk, the metadata should be re-dumped to the | |
4449 | * newest chunk. | |
4450 | * | |
4451 | * However, it is possible for a stream to transition to | |
4452 | * a "no-chunk" state. This can happen if a rotation | |
4453 | * occurs on an inactive session. In such cases, the metadata | |
4454 | * regeneration will happen when the next trace chunk is | |
4455 | * created. | |
4456 | */ | |
4457 | ret = consumer_metadata_stream_dump(stream); | |
4458 | if (ret) { | |
4459 | goto error; | |
d73bf3d7 JD |
4460 | } |
4461 | } | |
4462 | lttng_consumer_reset_stream_rotate_state(stream); | |
4463 | ||
4464 | ret = 0; | |
4465 | ||
4466 | error: | |
4467 | return ret; | |
4468 | } | |
4469 | ||
b99a8d42 JD |
4470 | /* |
4471 | * Rotate all the ready streams now. | |
4472 | * | |
4473 | * This is especially important for low throughput streams that have already | |
4474 | * been consumed, we cannot wait for their next packet to perform the | |
4475 | * rotation. | |
92b7a7f8 MD |
4476 | * Need to be called with RCU read-side lock held to ensure existence of |
4477 | * channel. | |
b99a8d42 JD |
4478 | * |
4479 | * Returns 0 on success, < 0 on error | |
4480 | */ | |
92b7a7f8 MD |
4481 | int lttng_consumer_rotate_ready_streams(struct lttng_consumer_channel *channel, |
4482 | uint64_t key, struct lttng_consumer_local_data *ctx) | |
b99a8d42 JD |
4483 | { |
4484 | int ret; | |
b99a8d42 JD |
4485 | struct lttng_consumer_stream *stream; |
4486 | struct lttng_ht_iter iter; | |
4487 | struct lttng_ht *ht = consumer_data.stream_per_chan_id_ht; | |
4488 | ||
4489 | rcu_read_lock(); | |
4490 | ||
4491 | DBG("Consumer rotate ready streams in channel %" PRIu64, key); | |
4492 | ||
b99a8d42 JD |
4493 | cds_lfht_for_each_entry_duplicate(ht->ht, |
4494 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
4495 | ht->match_fct, &channel->key, &iter.iter, | |
4496 | stream, node_channel_id.node) { | |
4497 | health_code_update(); | |
4498 | ||
d2956687 | 4499 | pthread_mutex_lock(&stream->chan->lock); |
b99a8d42 JD |
4500 | pthread_mutex_lock(&stream->lock); |
4501 | ||
4502 | if (!stream->rotate_ready) { | |
4503 | pthread_mutex_unlock(&stream->lock); | |
d2956687 | 4504 | pthread_mutex_unlock(&stream->chan->lock); |
b99a8d42 JD |
4505 | continue; |
4506 | } | |
4507 | DBG("Consumer rotate ready stream %" PRIu64, stream->key); | |
4508 | ||
d2956687 | 4509 | ret = lttng_consumer_rotate_stream(ctx, stream); |
b99a8d42 | 4510 | pthread_mutex_unlock(&stream->lock); |
d2956687 | 4511 | pthread_mutex_unlock(&stream->chan->lock); |
b99a8d42 JD |
4512 | if (ret) { |
4513 | goto end; | |
4514 | } | |
4515 | } | |
4516 | ||
4517 | ret = 0; | |
4518 | ||
4519 | end: | |
4520 | rcu_read_unlock(); | |
4521 | return ret; | |
4522 | } | |
4523 | ||
d2956687 JG |
4524 | enum lttcomm_return_code lttng_consumer_init_command( |
4525 | struct lttng_consumer_local_data *ctx, | |
4526 | const lttng_uuid sessiond_uuid) | |
00fb02ac | 4527 | { |
d2956687 | 4528 | enum lttcomm_return_code ret; |
c70636a7 | 4529 | char uuid_str[LTTNG_UUID_STR_LEN]; |
00fb02ac | 4530 | |
d2956687 JG |
4531 | if (ctx->sessiond_uuid.is_set) { |
4532 | ret = LTTCOMM_CONSUMERD_ALREADY_SET; | |
00fb02ac JD |
4533 | goto end; |
4534 | } | |
4535 | ||
d2956687 JG |
4536 | ctx->sessiond_uuid.is_set = true; |
4537 | memcpy(ctx->sessiond_uuid.value, sessiond_uuid, sizeof(lttng_uuid)); | |
4538 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
4539 | lttng_uuid_to_str(sessiond_uuid, uuid_str); | |
4540 | DBG("Received session daemon UUID: %s", uuid_str); | |
00fb02ac JD |
4541 | end: |
4542 | return ret; | |
4543 | } | |
4544 | ||
d2956687 JG |
4545 | enum lttcomm_return_code lttng_consumer_create_trace_chunk( |
4546 | const uint64_t *relayd_id, uint64_t session_id, | |
4547 | uint64_t chunk_id, | |
4548 | time_t chunk_creation_timestamp, | |
4549 | const char *chunk_override_name, | |
4550 | const struct lttng_credentials *credentials, | |
4551 | struct lttng_directory_handle *chunk_directory_handle) | |
00fb02ac JD |
4552 | { |
4553 | int ret; | |
d2956687 | 4554 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
7ea24db3 | 4555 | struct lttng_trace_chunk *created_chunk = NULL, *published_chunk = NULL; |
d2956687 JG |
4556 | enum lttng_trace_chunk_status chunk_status; |
4557 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4558 | char creation_timestamp_buffer[ISO8601_STR_LEN]; | |
4559 | const char *relayd_id_str = "(none)"; | |
4560 | const char *creation_timestamp_str; | |
4561 | struct lttng_ht_iter iter; | |
4562 | struct lttng_consumer_channel *channel; | |
92816cc3 | 4563 | |
d2956687 JG |
4564 | if (relayd_id) { |
4565 | /* Only used for logging purposes. */ | |
4566 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), | |
4567 | "%" PRIu64, *relayd_id); | |
4568 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { | |
4569 | relayd_id_str = relayd_id_buffer; | |
4570 | } else { | |
4571 | relayd_id_str = "(formatting error)"; | |
4572 | } | |
4573 | } | |
4574 | ||
4575 | /* Local protocol error. */ | |
4576 | assert(chunk_creation_timestamp); | |
4577 | ret = time_to_iso8601_str(chunk_creation_timestamp, | |
4578 | creation_timestamp_buffer, | |
4579 | sizeof(creation_timestamp_buffer)); | |
4580 | creation_timestamp_str = !ret ? creation_timestamp_buffer : | |
4581 | "(formatting error)"; | |
4582 | ||
4583 | DBG("Consumer create trace chunk command: relay_id = %s" | |
4584 | ", session_id = %" PRIu64 ", chunk_id = %" PRIu64 | |
4585 | ", chunk_override_name = %s" | |
4586 | ", chunk_creation_timestamp = %s", | |
4587 | relayd_id_str, session_id, chunk_id, | |
4588 | chunk_override_name ? : "(none)", | |
4589 | creation_timestamp_str); | |
92816cc3 JG |
4590 | |
4591 | /* | |
d2956687 JG |
4592 | * The trace chunk registry, as used by the consumer daemon, implicitly |
4593 | * owns the trace chunks. This is only needed in the consumer since | |
4594 | * the consumer has no notion of a session beyond session IDs being | |
4595 | * used to identify other objects. | |
4596 | * | |
4597 | * The lttng_trace_chunk_registry_publish() call below provides a | |
4598 | * reference which is not released; it implicitly becomes the session | |
4599 | * daemon's reference to the chunk in the consumer daemon. | |
4600 | * | |
4601 | * The lifetime of trace chunks in the consumer daemon is managed by | |
4602 | * the session daemon through the LTTNG_CONSUMER_CREATE_TRACE_CHUNK | |
4603 | * and LTTNG_CONSUMER_DESTROY_TRACE_CHUNK commands. | |
92816cc3 | 4604 | */ |
d2956687 | 4605 | created_chunk = lttng_trace_chunk_create(chunk_id, |
a7ceb342 | 4606 | chunk_creation_timestamp, NULL); |
d2956687 JG |
4607 | if (!created_chunk) { |
4608 | ERR("Failed to create trace chunk"); | |
4609 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4610 | goto error; |
d2956687 | 4611 | } |
92816cc3 | 4612 | |
d2956687 JG |
4613 | if (chunk_override_name) { |
4614 | chunk_status = lttng_trace_chunk_override_name(created_chunk, | |
4615 | chunk_override_name); | |
4616 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4617 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4618 | goto error; |
92816cc3 JG |
4619 | } |
4620 | } | |
4621 | ||
d2956687 JG |
4622 | if (chunk_directory_handle) { |
4623 | chunk_status = lttng_trace_chunk_set_credentials(created_chunk, | |
4624 | credentials); | |
4625 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4626 | ERR("Failed to set trace chunk credentials"); | |
4627 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4628 | goto error; |
d2956687 JG |
4629 | } |
4630 | /* | |
4631 | * The consumer daemon has no ownership of the chunk output | |
4632 | * directory. | |
4633 | */ | |
4634 | chunk_status = lttng_trace_chunk_set_as_user(created_chunk, | |
4635 | chunk_directory_handle); | |
cbf53d23 | 4636 | chunk_directory_handle = NULL; |
d2956687 JG |
4637 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
4638 | ERR("Failed to set trace chunk's directory handle"); | |
4639 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4640 | goto error; |
92816cc3 JG |
4641 | } |
4642 | } | |
4643 | ||
d2956687 JG |
4644 | published_chunk = lttng_trace_chunk_registry_publish_chunk( |
4645 | consumer_data.chunk_registry, session_id, | |
4646 | created_chunk); | |
4647 | lttng_trace_chunk_put(created_chunk); | |
4648 | created_chunk = NULL; | |
4649 | if (!published_chunk) { | |
4650 | ERR("Failed to publish trace chunk"); | |
4651 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4652 | goto error; |
d88744a4 JD |
4653 | } |
4654 | ||
d2956687 JG |
4655 | rcu_read_lock(); |
4656 | cds_lfht_for_each_entry_duplicate(consumer_data.channels_by_session_id_ht->ht, | |
4657 | consumer_data.channels_by_session_id_ht->hash_fct( | |
4658 | &session_id, lttng_ht_seed), | |
4659 | consumer_data.channels_by_session_id_ht->match_fct, | |
4660 | &session_id, &iter.iter, channel, | |
4661 | channels_by_session_id_ht_node.node) { | |
4662 | ret = lttng_consumer_channel_set_trace_chunk(channel, | |
4663 | published_chunk); | |
4664 | if (ret) { | |
4665 | /* | |
4666 | * Roll-back the creation of this chunk. | |
4667 | * | |
4668 | * This is important since the session daemon will | |
4669 | * assume that the creation of this chunk failed and | |
4670 | * will never ask for it to be closed, resulting | |
4671 | * in a leak and an inconsistent state for some | |
4672 | * channels. | |
4673 | */ | |
4674 | enum lttcomm_return_code close_ret; | |
ecd1a12f | 4675 | char path[LTTNG_PATH_MAX]; |
d2956687 JG |
4676 | |
4677 | DBG("Failed to set new trace chunk on existing channels, rolling back"); | |
4678 | close_ret = lttng_consumer_close_trace_chunk(relayd_id, | |
4679 | session_id, chunk_id, | |
ecd1a12f MD |
4680 | chunk_creation_timestamp, NULL, |
4681 | path); | |
d2956687 JG |
4682 | if (close_ret != LTTCOMM_CONSUMERD_SUCCESS) { |
4683 | ERR("Failed to roll-back the creation of new chunk: session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
4684 | session_id, chunk_id); | |
4685 | } | |
a1ae2ea5 | 4686 | |
d2956687 JG |
4687 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; |
4688 | break; | |
4689 | } | |
a1ae2ea5 JD |
4690 | } |
4691 | ||
e5add6d0 JG |
4692 | if (relayd_id) { |
4693 | struct consumer_relayd_sock_pair *relayd; | |
4694 | ||
4695 | relayd = consumer_find_relayd(*relayd_id); | |
4696 | if (relayd) { | |
4697 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
4698 | ret = relayd_create_trace_chunk( | |
4699 | &relayd->control_sock, published_chunk); | |
4700 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
4701 | } else { | |
4702 | ERR("Failed to find relay daemon socket: relayd_id = %" PRIu64, *relayd_id); | |
4703 | } | |
4704 | ||
4705 | if (!relayd || ret) { | |
4706 | enum lttcomm_return_code close_ret; | |
ecd1a12f | 4707 | char path[LTTNG_PATH_MAX]; |
e5add6d0 JG |
4708 | |
4709 | close_ret = lttng_consumer_close_trace_chunk(relayd_id, | |
4710 | session_id, | |
4711 | chunk_id, | |
bbc4768c | 4712 | chunk_creation_timestamp, |
ecd1a12f | 4713 | NULL, path); |
e5add6d0 JG |
4714 | if (close_ret != LTTCOMM_CONSUMERD_SUCCESS) { |
4715 | ERR("Failed to roll-back the creation of new chunk: session_id = %" PRIu64 ", chunk_id = %" PRIu64, | |
4716 | session_id, | |
4717 | chunk_id); | |
4718 | } | |
4719 | ||
4720 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4721 | goto error_unlock; |
e5add6d0 JG |
4722 | } |
4723 | } | |
7ea24db3 | 4724 | error_unlock: |
e5add6d0 | 4725 | rcu_read_unlock(); |
7ea24db3 | 4726 | error: |
d2956687 JG |
4727 | /* Release the reference returned by the "publish" operation. */ |
4728 | lttng_trace_chunk_put(published_chunk); | |
9bb5f1f8 | 4729 | lttng_trace_chunk_put(created_chunk); |
d2956687 | 4730 | return ret_code; |
a1ae2ea5 JD |
4731 | } |
4732 | ||
d2956687 JG |
4733 | enum lttcomm_return_code lttng_consumer_close_trace_chunk( |
4734 | const uint64_t *relayd_id, uint64_t session_id, | |
bbc4768c | 4735 | uint64_t chunk_id, time_t chunk_close_timestamp, |
ecd1a12f MD |
4736 | const enum lttng_trace_chunk_command_type *close_command, |
4737 | char *path) | |
a1ae2ea5 | 4738 | { |
d2956687 JG |
4739 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
4740 | struct lttng_trace_chunk *chunk; | |
4741 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4742 | const char *relayd_id_str = "(none)"; | |
bbc4768c | 4743 | const char *close_command_name = "none"; |
d2956687 JG |
4744 | struct lttng_ht_iter iter; |
4745 | struct lttng_consumer_channel *channel; | |
4746 | enum lttng_trace_chunk_status chunk_status; | |
a1ae2ea5 | 4747 | |
d2956687 JG |
4748 | if (relayd_id) { |
4749 | int ret; | |
4750 | ||
4751 | /* Only used for logging purposes. */ | |
4752 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), | |
4753 | "%" PRIu64, *relayd_id); | |
4754 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { | |
4755 | relayd_id_str = relayd_id_buffer; | |
4756 | } else { | |
4757 | relayd_id_str = "(formatting error)"; | |
4758 | } | |
bbc4768c JG |
4759 | } |
4760 | if (close_command) { | |
4761 | close_command_name = lttng_trace_chunk_command_type_get_name( | |
4762 | *close_command); | |
4763 | } | |
d2956687 JG |
4764 | |
4765 | DBG("Consumer close trace chunk command: relayd_id = %s" | |
bbc4768c JG |
4766 | ", session_id = %" PRIu64 ", chunk_id = %" PRIu64 |
4767 | ", close command = %s", | |
4768 | relayd_id_str, session_id, chunk_id, | |
4769 | close_command_name); | |
4770 | ||
d2956687 | 4771 | chunk = lttng_trace_chunk_registry_find_chunk( |
bbc4768c JG |
4772 | consumer_data.chunk_registry, session_id, chunk_id); |
4773 | if (!chunk) { | |
d2956687 JG |
4774 | ERR("Failed to find chunk: session_id = %" PRIu64 |
4775 | ", chunk_id = %" PRIu64, | |
4776 | session_id, chunk_id); | |
4777 | ret_code = LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; | |
a1ae2ea5 JD |
4778 | goto end; |
4779 | } | |
4780 | ||
d2956687 JG |
4781 | chunk_status = lttng_trace_chunk_set_close_timestamp(chunk, |
4782 | chunk_close_timestamp); | |
4783 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4784 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4785 | goto end; | |
45f1d9a1 | 4786 | } |
bbc4768c JG |
4787 | |
4788 | if (close_command) { | |
4789 | chunk_status = lttng_trace_chunk_set_close_command( | |
4790 | chunk, *close_command); | |
4791 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
4792 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4793 | goto end; | |
4794 | } | |
4795 | } | |
a1ae2ea5 | 4796 | |
d2956687 JG |
4797 | /* |
4798 | * chunk is now invalid to access as we no longer hold a reference to | |
4799 | * it; it is only kept around to compare it (by address) to the | |
4800 | * current chunk found in the session's channels. | |
4801 | */ | |
4802 | rcu_read_lock(); | |
4803 | cds_lfht_for_each_entry(consumer_data.channel_ht->ht, &iter.iter, | |
4804 | channel, node.node) { | |
4805 | int ret; | |
a1ae2ea5 | 4806 | |
d2956687 JG |
4807 | /* |
4808 | * Only change the channel's chunk to NULL if it still | |
4809 | * references the chunk being closed. The channel may | |
4810 | * reference a newer channel in the case of a session | |
4811 | * rotation. When a session rotation occurs, the "next" | |
4812 | * chunk is created before the "current" chunk is closed. | |
4813 | */ | |
4814 | if (channel->trace_chunk != chunk) { | |
4815 | continue; | |
4816 | } | |
4817 | ret = lttng_consumer_channel_set_trace_chunk(channel, NULL); | |
4818 | if (ret) { | |
4819 | /* | |
4820 | * Attempt to close the chunk on as many channels as | |
4821 | * possible. | |
4822 | */ | |
4823 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4824 | } | |
a1ae2ea5 | 4825 | } |
bbc4768c JG |
4826 | |
4827 | if (relayd_id) { | |
4828 | int ret; | |
4829 | struct consumer_relayd_sock_pair *relayd; | |
4830 | ||
4831 | relayd = consumer_find_relayd(*relayd_id); | |
4832 | if (relayd) { | |
4833 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
4834 | ret = relayd_close_trace_chunk( | |
ecd1a12f MD |
4835 | &relayd->control_sock, chunk, |
4836 | path); | |
bbc4768c JG |
4837 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
4838 | } else { | |
4839 | ERR("Failed to find relay daemon socket: relayd_id = %" PRIu64, | |
4840 | *relayd_id); | |
4841 | } | |
4842 | ||
4843 | if (!relayd || ret) { | |
4844 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4845 | goto error_unlock; | |
4846 | } | |
4847 | } | |
4848 | error_unlock: | |
d2956687 JG |
4849 | rcu_read_unlock(); |
4850 | end: | |
bbc4768c JG |
4851 | /* |
4852 | * Release the reference returned by the "find" operation and | |
4853 | * the session daemon's implicit reference to the chunk. | |
4854 | */ | |
4855 | lttng_trace_chunk_put(chunk); | |
4856 | lttng_trace_chunk_put(chunk); | |
4857 | ||
d2956687 | 4858 | return ret_code; |
a1ae2ea5 | 4859 | } |
3654ed19 | 4860 | |
d2956687 JG |
4861 | enum lttcomm_return_code lttng_consumer_trace_chunk_exists( |
4862 | const uint64_t *relayd_id, uint64_t session_id, | |
4863 | uint64_t chunk_id) | |
3654ed19 | 4864 | { |
c35f9726 | 4865 | int ret; |
d2956687 | 4866 | enum lttcomm_return_code ret_code; |
d2956687 JG |
4867 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; |
4868 | const char *relayd_id_str = "(none)"; | |
c35f9726 JG |
4869 | const bool is_local_trace = !relayd_id; |
4870 | struct consumer_relayd_sock_pair *relayd = NULL; | |
6b584c2e | 4871 | bool chunk_exists_local, chunk_exists_remote; |
d2956687 JG |
4872 | |
4873 | if (relayd_id) { | |
4874 | int ret; | |
4875 | ||
4876 | /* Only used for logging purposes. */ | |
4877 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), | |
4878 | "%" PRIu64, *relayd_id); | |
4879 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { | |
4880 | relayd_id_str = relayd_id_buffer; | |
4881 | } else { | |
4882 | relayd_id_str = "(formatting error)"; | |
4883 | } | |
4884 | } | |
4885 | ||
4886 | DBG("Consumer trace chunk exists command: relayd_id = %s" | |
d2956687 | 4887 | ", chunk_id = %" PRIu64, relayd_id_str, |
c35f9726 | 4888 | chunk_id); |
6b584c2e | 4889 | ret = lttng_trace_chunk_registry_chunk_exists( |
d2956687 | 4890 | consumer_data.chunk_registry, session_id, |
6b584c2e JG |
4891 | chunk_id, &chunk_exists_local); |
4892 | if (ret) { | |
4893 | /* Internal error. */ | |
4894 | ERR("Failed to query the existence of a trace chunk"); | |
4895 | ret_code = LTTCOMM_CONSUMERD_FATAL; | |
13e3b280 | 4896 | goto end; |
6b584c2e JG |
4897 | } |
4898 | DBG("Trace chunk %s locally", | |
4899 | chunk_exists_local ? "exists" : "does not exist"); | |
4900 | if (chunk_exists_local) { | |
c35f9726 | 4901 | ret_code = LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL; |
c35f9726 JG |
4902 | goto end; |
4903 | } else if (is_local_trace) { | |
4904 | ret_code = LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; | |
4905 | goto end; | |
4906 | } | |
4907 | ||
4908 | rcu_read_lock(); | |
4909 | relayd = consumer_find_relayd(*relayd_id); | |
4910 | if (!relayd) { | |
4911 | ERR("Failed to find relayd %" PRIu64, *relayd_id); | |
4912 | ret_code = LTTCOMM_CONSUMERD_INVALID_PARAMETERS; | |
4913 | goto end_rcu_unlock; | |
4914 | } | |
4915 | DBG("Looking up existence of trace chunk on relay daemon"); | |
4916 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
4917 | ret = relayd_trace_chunk_exists(&relayd->control_sock, chunk_id, | |
4918 | &chunk_exists_remote); | |
4919 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
4920 | if (ret < 0) { | |
4921 | ERR("Failed to look-up the existence of trace chunk on relay daemon"); | |
4922 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
4923 | goto end_rcu_unlock; | |
4924 | } | |
4925 | ||
4926 | ret_code = chunk_exists_remote ? | |
4927 | LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_REMOTE : | |
d2956687 | 4928 | LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; |
c35f9726 JG |
4929 | DBG("Trace chunk %s on relay daemon", |
4930 | chunk_exists_remote ? "exists" : "does not exist"); | |
d2956687 | 4931 | |
c35f9726 JG |
4932 | end_rcu_unlock: |
4933 | rcu_read_unlock(); | |
4934 | end: | |
d2956687 | 4935 | return ret_code; |
3654ed19 | 4936 | } |
5f3aff8b MD |
4937 | |
4938 | static | |
4939 | int consumer_clear_monitored_channel(struct lttng_consumer_channel *channel) | |
4940 | { | |
4941 | struct lttng_ht *ht; | |
4942 | struct lttng_consumer_stream *stream; | |
4943 | struct lttng_ht_iter iter; | |
4944 | int ret; | |
4945 | ||
4946 | ht = consumer_data.stream_per_chan_id_ht; | |
4947 | ||
4948 | rcu_read_lock(); | |
4949 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
4950 | ht->hash_fct(&channel->key, lttng_ht_seed), | |
4951 | ht->match_fct, &channel->key, | |
4952 | &iter.iter, stream, node_channel_id.node) { | |
4953 | /* | |
4954 | * Protect against teardown with mutex. | |
4955 | */ | |
4956 | pthread_mutex_lock(&stream->lock); | |
4957 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
4958 | goto next; | |
4959 | } | |
4960 | ret = consumer_clear_stream(stream); | |
4961 | if (ret) { | |
4962 | goto error_unlock; | |
4963 | } | |
4964 | next: | |
4965 | pthread_mutex_unlock(&stream->lock); | |
4966 | } | |
4967 | rcu_read_unlock(); | |
4968 | return LTTCOMM_CONSUMERD_SUCCESS; | |
4969 | ||
4970 | error_unlock: | |
4971 | pthread_mutex_unlock(&stream->lock); | |
4972 | rcu_read_unlock(); | |
4973 | return ret; | |
4974 | } | |
4975 | ||
4976 | int lttng_consumer_clear_channel(struct lttng_consumer_channel *channel) | |
4977 | { | |
4978 | int ret; | |
4979 | ||
4980 | DBG("Consumer clear channel %" PRIu64, channel->key); | |
4981 | ||
4982 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
4983 | /* | |
4984 | * Nothing to do for the metadata channel/stream. | |
4985 | * Snapshot mechanism already take care of the metadata | |
4986 | * handling/generation, and monitored channels only need to | |
4987 | * have their data stream cleared.. | |
4988 | */ | |
4989 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
4990 | goto end; | |
4991 | } | |
4992 | ||
4993 | if (!channel->monitor) { | |
4994 | ret = consumer_clear_unmonitored_channel(channel); | |
4995 | } else { | |
4996 | ret = consumer_clear_monitored_channel(channel); | |
4997 | } | |
4998 | end: | |
4999 | return ret; | |
5000 | } |