Commit | Line | Data |
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3bd1e081 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * Copyright (C) 2012 David Goulet <dgoulet@efficios.com> | |
3bd1e081 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
3bd1e081 | 7 | * |
3bd1e081 MD |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
c9e313bc SM |
11 | #include <common/align.hpp> |
12 | #include <common/common.hpp> | |
13 | #include <common/compat/endian.hpp> | |
14 | #include <common/compat/poll.hpp> | |
15 | #include <common/consumer/consumer-metadata-cache.hpp> | |
16 | #include <common/consumer/consumer-stream.hpp> | |
17 | #include <common/consumer/consumer-testpoint.hpp> | |
18 | #include <common/consumer/consumer-timer.hpp> | |
19 | #include <common/consumer/consumer.hpp> | |
20 | #include <common/dynamic-array.hpp> | |
21 | #include <common/index/ctf-index.hpp> | |
22 | #include <common/index/index.hpp> | |
671e39d7 | 23 | #include <common/io-hint.hpp> |
c9e313bc SM |
24 | #include <common/kernel-consumer/kernel-consumer.hpp> |
25 | #include <common/kernel-ctl/kernel-ctl.hpp> | |
26 | #include <common/relayd/relayd.hpp> | |
27 | #include <common/sessiond-comm/relayd.hpp> | |
28 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
29 | #include <common/string-utils/format.hpp> | |
30 | #include <common/time.hpp> | |
31 | #include <common/trace-chunk-registry.hpp> | |
32 | #include <common/trace-chunk.hpp> | |
56047f5a | 33 | #include <common/urcu.hpp> |
c9e313bc SM |
34 | #include <common/ust-consumer/ust-consumer.hpp> |
35 | #include <common/utils.hpp> | |
3bd1e081 | 36 | |
28ab034a | 37 | #include <bin/lttng-consumerd/health-consumerd.hpp> |
671e39d7 | 38 | #include <fcntl.h> |
28ab034a JG |
39 | #include <inttypes.h> |
40 | #include <poll.h> | |
41 | #include <pthread.h> | |
42 | #include <signal.h> | |
43 | #include <stdlib.h> | |
44 | #include <string.h> | |
45 | #include <sys/mman.h> | |
46 | #include <sys/socket.h> | |
47 | #include <sys/types.h> | |
fbd566c2 | 48 | #include <type_traits> |
28ab034a JG |
49 | #include <unistd.h> |
50 | ||
97535efa | 51 | lttng_consumer_global_data the_consumer_data; |
3bd1e081 | 52 | |
d8ef542d MD |
53 | enum consumer_channel_action { |
54 | CONSUMER_CHANNEL_ADD, | |
a0cbdd2e | 55 | CONSUMER_CHANNEL_DEL, |
d8ef542d MD |
56 | CONSUMER_CHANNEL_QUIT, |
57 | }; | |
58 | ||
f1494934 | 59 | namespace { |
d8ef542d MD |
60 | struct consumer_channel_msg { |
61 | enum consumer_channel_action action; | |
28ab034a JG |
62 | struct lttng_consumer_channel *chan; /* add */ |
63 | uint64_t key; /* del */ | |
d8ef542d MD |
64 | }; |
65 | ||
f1494934 JG |
66 | /* |
67 | * Global hash table containing respectively metadata and data streams. The | |
68 | * stream element in this ht should only be updated by the metadata poll thread | |
69 | * for the metadata and the data poll thread for the data. | |
70 | */ | |
71 | struct lttng_ht *metadata_ht; | |
72 | struct lttng_ht *data_ht; | |
73 | } /* namespace */ | |
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 | |
cd9adb8b | 86 | static const char *get_consumer_domain() |
5da88b0f | 87 | { |
fa29bfbf | 88 | switch (the_consumer_data.type) { |
5da88b0f MD |
89 | case LTTNG_CONSUMER_KERNEL: |
90 | return DEFAULT_KERNEL_TRACE_DIR; | |
91 | case LTTNG_CONSUMER64_UST: | |
92 | /* Fall-through. */ | |
93 | case LTTNG_CONSUMER32_UST: | |
94 | return DEFAULT_UST_TRACE_DIR; | |
95 | default: | |
96 | abort(); | |
97 | } | |
98 | } | |
99 | ||
acdb9057 DG |
100 | /* |
101 | * Notify a thread lttng pipe to poll back again. This usually means that some | |
102 | * global state has changed so we just send back the thread in a poll wait | |
103 | * call. | |
104 | */ | |
105 | static void notify_thread_lttng_pipe(struct lttng_pipe *pipe) | |
106 | { | |
cd9adb8b | 107 | struct lttng_consumer_stream *null_stream = nullptr; |
acdb9057 | 108 | |
a0377dfe | 109 | LTTNG_ASSERT(pipe); |
acdb9057 | 110 | |
5c7248cd JG |
111 | (void) lttng_pipe_write(pipe, &null_stream, sizeof(null_stream)); /* NOLINT sizeof used on a |
112 | pointer. */ | |
acdb9057 DG |
113 | } |
114 | ||
5c635c72 MD |
115 | static void notify_health_quit_pipe(int *pipe) |
116 | { | |
6cd525e8 | 117 | ssize_t ret; |
5c635c72 | 118 | |
6cd525e8 MD |
119 | ret = lttng_write(pipe[1], "4", 1); |
120 | if (ret < 1) { | |
5c635c72 MD |
121 | PERROR("write consumer health quit"); |
122 | } | |
123 | } | |
124 | ||
d8ef542d | 125 | static void notify_channel_pipe(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
126 | struct lttng_consumer_channel *chan, |
127 | uint64_t key, | |
128 | enum consumer_channel_action action) | |
d8ef542d MD |
129 | { |
130 | struct consumer_channel_msg msg; | |
6cd525e8 | 131 | ssize_t ret; |
d8ef542d | 132 | |
e56251fc DG |
133 | memset(&msg, 0, sizeof(msg)); |
134 | ||
d8ef542d MD |
135 | msg.action = action; |
136 | msg.chan = chan; | |
f21dae48 | 137 | msg.key = key; |
6cd525e8 MD |
138 | ret = lttng_write(ctx->consumer_channel_pipe[1], &msg, sizeof(msg)); |
139 | if (ret < sizeof(msg)) { | |
140 | PERROR("notify_channel_pipe write error"); | |
141 | } | |
d8ef542d MD |
142 | } |
143 | ||
28ab034a | 144 | void notify_thread_del_channel(struct lttng_consumer_local_data *ctx, uint64_t key) |
a0cbdd2e | 145 | { |
cd9adb8b | 146 | notify_channel_pipe(ctx, nullptr, key, CONSUMER_CHANNEL_DEL); |
a0cbdd2e MD |
147 | } |
148 | ||
d8ef542d | 149 | static int read_channel_pipe(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
150 | struct lttng_consumer_channel **chan, |
151 | uint64_t *key, | |
152 | enum consumer_channel_action *action) | |
d8ef542d MD |
153 | { |
154 | struct consumer_channel_msg msg; | |
6cd525e8 | 155 | ssize_t ret; |
d8ef542d | 156 | |
6cd525e8 MD |
157 | ret = lttng_read(ctx->consumer_channel_pipe[0], &msg, sizeof(msg)); |
158 | if (ret < sizeof(msg)) { | |
159 | ret = -1; | |
160 | goto error; | |
d8ef542d | 161 | } |
6cd525e8 MD |
162 | *action = msg.action; |
163 | *chan = msg.chan; | |
164 | *key = msg.key; | |
165 | error: | |
166 | return (int) ret; | |
d8ef542d MD |
167 | } |
168 | ||
212d67a2 DG |
169 | /* |
170 | * Cleanup the stream list of a channel. Those streams are not yet globally | |
171 | * visible | |
172 | */ | |
173 | static void clean_channel_stream_list(struct lttng_consumer_channel *channel) | |
174 | { | |
175 | struct lttng_consumer_stream *stream, *stmp; | |
176 | ||
a0377dfe | 177 | LTTNG_ASSERT(channel); |
212d67a2 DG |
178 | |
179 | /* Delete streams that might have been left in the stream list. */ | |
28ab034a | 180 | cds_list_for_each_entry_safe (stream, stmp, &channel->streams.head, send_node) { |
cd9adb8b | 181 | consumer_stream_destroy(stream, nullptr); |
212d67a2 DG |
182 | } |
183 | } | |
184 | ||
3bd1e081 MD |
185 | /* |
186 | * Find a stream. The consumer_data.lock must be locked during this | |
187 | * call. | |
188 | */ | |
28ab034a | 189 | static struct lttng_consumer_stream *find_stream(uint64_t key, struct lttng_ht *ht) |
3bd1e081 | 190 | { |
e4421fec | 191 | struct lttng_ht_iter iter; |
d88aee68 | 192 | struct lttng_ht_node_u64 *node; |
cd9adb8b | 193 | struct lttng_consumer_stream *stream = nullptr; |
3bd1e081 | 194 | |
a0377dfe | 195 | LTTNG_ASSERT(ht); |
8389e4f8 | 196 | |
d88aee68 DG |
197 | /* -1ULL keys are lookup failures */ |
198 | if (key == (uint64_t) -1ULL) { | |
cd9adb8b | 199 | return nullptr; |
7a57cf92 | 200 | } |
e4421fec | 201 | |
56047f5a | 202 | lttng::urcu::read_lock_guard read_lock; |
6065ceec | 203 | |
d88aee68 | 204 | lttng_ht_lookup(ht, &key, &iter); |
00d7d903 | 205 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
cd9adb8b | 206 | if (node != nullptr) { |
0114db0e | 207 | stream = lttng::utils::container_of(node, <tng_consumer_stream::node); |
3bd1e081 | 208 | } |
e4421fec DG |
209 | |
210 | return stream; | |
3bd1e081 MD |
211 | } |
212 | ||
da009f2c | 213 | static void steal_stream_key(uint64_t key, struct lttng_ht *ht) |
7ad0a0cb MD |
214 | { |
215 | struct lttng_consumer_stream *stream; | |
216 | ||
56047f5a | 217 | lttng::urcu::read_lock_guard read_lock; |
ffe60014 | 218 | stream = find_stream(key, ht); |
04253271 | 219 | if (stream) { |
da009f2c | 220 | stream->key = (uint64_t) -1ULL; |
04253271 MD |
221 | /* |
222 | * We don't want the lookup to match, but we still need | |
223 | * to iterate on this stream when iterating over the hash table. Just | |
224 | * change the node key. | |
225 | */ | |
da009f2c | 226 | stream->node.key = (uint64_t) -1ULL; |
04253271 | 227 | } |
7ad0a0cb MD |
228 | } |
229 | ||
d56db448 DG |
230 | /* |
231 | * Return a channel object for the given key. | |
232 | * | |
233 | * RCU read side lock MUST be acquired before calling this function and | |
234 | * protects the channel ptr. | |
235 | */ | |
d88aee68 | 236 | struct lttng_consumer_channel *consumer_find_channel(uint64_t key) |
3bd1e081 | 237 | { |
e4421fec | 238 | struct lttng_ht_iter iter; |
d88aee68 | 239 | struct lttng_ht_node_u64 *node; |
cd9adb8b | 240 | struct lttng_consumer_channel *channel = nullptr; |
3bd1e081 | 241 | |
48b7cdc2 FD |
242 | ASSERT_RCU_READ_LOCKED(); |
243 | ||
d88aee68 DG |
244 | /* -1ULL keys are lookup failures */ |
245 | if (key == (uint64_t) -1ULL) { | |
cd9adb8b | 246 | return nullptr; |
7a57cf92 | 247 | } |
e4421fec | 248 | |
fa29bfbf | 249 | lttng_ht_lookup(the_consumer_data.channel_ht, &key, &iter); |
00d7d903 | 250 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
cd9adb8b | 251 | if (node != nullptr) { |
0114db0e | 252 | channel = lttng::utils::container_of(node, <tng_consumer_channel::node); |
3bd1e081 | 253 | } |
e4421fec DG |
254 | |
255 | return channel; | |
3bd1e081 MD |
256 | } |
257 | ||
b5a6470f DG |
258 | /* |
259 | * There is a possibility that the consumer does not have enough time between | |
260 | * the close of the channel on the session daemon and the cleanup in here thus | |
261 | * once we have a channel add with an existing key, we know for sure that this | |
262 | * channel will eventually get cleaned up by all streams being closed. | |
263 | * | |
264 | * This function just nullifies the already existing channel key. | |
265 | */ | |
266 | static void steal_channel_key(uint64_t key) | |
267 | { | |
268 | struct lttng_consumer_channel *channel; | |
269 | ||
56047f5a | 270 | lttng::urcu::read_lock_guard read_lock; |
b5a6470f DG |
271 | channel = consumer_find_channel(key); |
272 | if (channel) { | |
273 | channel->key = (uint64_t) -1ULL; | |
274 | /* | |
275 | * We don't want the lookup to match, but we still need to iterate on | |
276 | * this channel when iterating over the hash table. Just change the | |
277 | * node key. | |
278 | */ | |
279 | channel->node.key = (uint64_t) -1ULL; | |
280 | } | |
b5a6470f DG |
281 | } |
282 | ||
ffe60014 | 283 | static void free_channel_rcu(struct rcu_head *head) |
702b1ea4 | 284 | { |
28ab034a | 285 | struct lttng_ht_node_u64 *node = lttng::utils::container_of(head, <tng_ht_node_u64::head); |
ffe60014 | 286 | struct lttng_consumer_channel *channel = |
0114db0e | 287 | lttng::utils::container_of(node, <tng_consumer_channel::node); |
702b1ea4 | 288 | |
fa29bfbf | 289 | switch (the_consumer_data.type) { |
b83e03c4 MD |
290 | case LTTNG_CONSUMER_KERNEL: |
291 | break; | |
292 | case LTTNG_CONSUMER32_UST: | |
293 | case LTTNG_CONSUMER64_UST: | |
294 | lttng_ustconsumer_free_channel(channel); | |
295 | break; | |
296 | default: | |
297 | ERR("Unknown consumer_data type"); | |
298 | abort(); | |
299 | } | |
32670d71 JG |
300 | |
301 | delete channel; | |
702b1ea4 MD |
302 | } |
303 | ||
00e2e675 DG |
304 | /* |
305 | * RCU protected relayd socket pair free. | |
306 | */ | |
ffe60014 | 307 | static void free_relayd_rcu(struct rcu_head *head) |
00e2e675 | 308 | { |
28ab034a | 309 | struct lttng_ht_node_u64 *node = lttng::utils::container_of(head, <tng_ht_node_u64::head); |
00e2e675 | 310 | struct consumer_relayd_sock_pair *relayd = |
0114db0e | 311 | lttng::utils::container_of(node, &consumer_relayd_sock_pair::node); |
00e2e675 | 312 | |
8994307f DG |
313 | /* |
314 | * Close all sockets. This is done in the call RCU since we don't want the | |
315 | * socket fds to be reassigned thus potentially creating bad state of the | |
316 | * relayd object. | |
317 | * | |
318 | * We do not have to lock the control socket mutex here since at this stage | |
319 | * there is no one referencing to this relayd object. | |
320 | */ | |
321 | (void) relayd_close(&relayd->control_sock); | |
322 | (void) relayd_close(&relayd->data_sock); | |
323 | ||
3a84e2f3 | 324 | pthread_mutex_destroy(&relayd->ctrl_sock_mutex); |
00e2e675 DG |
325 | free(relayd); |
326 | } | |
327 | ||
328 | /* | |
329 | * Destroy and free relayd socket pair object. | |
00e2e675 | 330 | */ |
51230d70 | 331 | void consumer_destroy_relayd(struct consumer_relayd_sock_pair *relayd) |
00e2e675 DG |
332 | { |
333 | int ret; | |
334 | struct lttng_ht_iter iter; | |
335 | ||
cd9adb8b | 336 | if (relayd == nullptr) { |
173af62f DG |
337 | return; |
338 | } | |
339 | ||
00e2e675 DG |
340 | DBG("Consumer destroy and close relayd socket pair"); |
341 | ||
342 | iter.iter.node = &relayd->node.node; | |
fa29bfbf | 343 | ret = lttng_ht_del(the_consumer_data.relayd_ht, &iter); |
173af62f | 344 | if (ret != 0) { |
8994307f | 345 | /* We assume the relayd is being or is destroyed */ |
173af62f DG |
346 | return; |
347 | } | |
00e2e675 | 348 | |
00e2e675 | 349 | /* RCU free() call */ |
ffe60014 DG |
350 | call_rcu(&relayd->node.head, free_relayd_rcu); |
351 | } | |
352 | ||
353 | /* | |
354 | * Remove a channel from the global list protected by a mutex. This function is | |
355 | * also responsible for freeing its data structures. | |
356 | */ | |
357 | void consumer_del_channel(struct lttng_consumer_channel *channel) | |
358 | { | |
ffe60014 DG |
359 | struct lttng_ht_iter iter; |
360 | ||
d88aee68 | 361 | DBG("Consumer delete channel key %" PRIu64, channel->key); |
ffe60014 | 362 | |
fa29bfbf | 363 | pthread_mutex_lock(&the_consumer_data.lock); |
a9838785 | 364 | pthread_mutex_lock(&channel->lock); |
ffe60014 | 365 | |
212d67a2 DG |
366 | /* Destroy streams that might have been left in the stream list. */ |
367 | clean_channel_stream_list(channel); | |
51e762e5 | 368 | |
d3e2ba59 JD |
369 | if (channel->live_timer_enabled == 1) { |
370 | consumer_timer_live_stop(channel); | |
371 | } | |
e9404c27 JG |
372 | if (channel->monitor_timer_enabled == 1) { |
373 | consumer_timer_monitor_stop(channel); | |
374 | } | |
d3e2ba59 | 375 | |
319dcddc JG |
376 | /* |
377 | * Send a last buffer statistics sample to the session daemon | |
378 | * to ensure it tracks the amount of data consumed by this channel. | |
379 | */ | |
380 | sample_and_send_channel_buffer_stats(channel); | |
381 | ||
fa29bfbf | 382 | switch (the_consumer_data.type) { |
ffe60014 DG |
383 | case LTTNG_CONSUMER_KERNEL: |
384 | break; | |
385 | case LTTNG_CONSUMER32_UST: | |
386 | case LTTNG_CONSUMER64_UST: | |
387 | lttng_ustconsumer_del_channel(channel); | |
388 | break; | |
389 | default: | |
390 | ERR("Unknown consumer_data type"); | |
a0377dfe | 391 | abort(); |
ffe60014 DG |
392 | goto end; |
393 | } | |
394 | ||
d2956687 | 395 | lttng_trace_chunk_put(channel->trace_chunk); |
cd9adb8b | 396 | channel->trace_chunk = nullptr; |
5c3892a6 | 397 | |
d2956687 JG |
398 | if (channel->is_published) { |
399 | int ret; | |
400 | ||
56047f5a | 401 | lttng::urcu::read_lock_guard read_lock; |
d2956687 | 402 | iter.iter.node = &channel->node.node; |
fa29bfbf | 403 | ret = lttng_ht_del(the_consumer_data.channel_ht, &iter); |
a0377dfe | 404 | LTTNG_ASSERT(!ret); |
ffe60014 | 405 | |
d2956687 | 406 | iter.iter.node = &channel->channels_by_session_id_ht_node.node; |
28ab034a | 407 | ret = lttng_ht_del(the_consumer_data.channels_by_session_id_ht, &iter); |
a0377dfe | 408 | LTTNG_ASSERT(!ret); |
d2956687 JG |
409 | } |
410 | ||
b6921a17 JG |
411 | channel->is_deleted = true; |
412 | call_rcu(&channel->node.head, free_channel_rcu); | |
ffe60014 | 413 | end: |
a9838785 | 414 | pthread_mutex_unlock(&channel->lock); |
fa29bfbf | 415 | pthread_mutex_unlock(&the_consumer_data.lock); |
00e2e675 DG |
416 | } |
417 | ||
228b5bf7 DG |
418 | /* |
419 | * Iterate over the relayd hash table and destroy each element. Finally, | |
420 | * destroy the whole hash table. | |
421 | */ | |
cd9adb8b | 422 | static void cleanup_relayd_ht() |
228b5bf7 DG |
423 | { |
424 | struct lttng_ht_iter iter; | |
425 | struct consumer_relayd_sock_pair *relayd; | |
426 | ||
56047f5a JG |
427 | { |
428 | lttng::urcu::read_lock_guard read_lock; | |
228b5bf7 | 429 | |
56047f5a JG |
430 | cds_lfht_for_each_entry ( |
431 | the_consumer_data.relayd_ht->ht, &iter.iter, relayd, node.node) { | |
432 | consumer_destroy_relayd(relayd); | |
433 | } | |
228b5bf7 DG |
434 | } |
435 | ||
fa29bfbf | 436 | lttng_ht_destroy(the_consumer_data.relayd_ht); |
228b5bf7 DG |
437 | } |
438 | ||
8994307f DG |
439 | /* |
440 | * Update the end point status of all streams having the given network sequence | |
441 | * index (relayd index). | |
442 | * | |
443 | * It's atomically set without having the stream mutex locked which is fine | |
444 | * because we handle the write/read race with a pipe wakeup for each thread. | |
445 | */ | |
da009f2c | 446 | static void update_endpoint_status_by_netidx(uint64_t net_seq_idx, |
28ab034a | 447 | enum consumer_endpoint_status status) |
8994307f DG |
448 | { |
449 | struct lttng_ht_iter iter; | |
450 | struct lttng_consumer_stream *stream; | |
451 | ||
da009f2c | 452 | DBG("Consumer set delete flag on stream by idx %" PRIu64, net_seq_idx); |
8994307f | 453 | |
56047f5a | 454 | lttng::urcu::read_lock_guard read_lock; |
8994307f DG |
455 | |
456 | /* Let's begin with metadata */ | |
28ab034a | 457 | cds_lfht_for_each_entry (metadata_ht->ht, &iter.iter, stream, node.node) { |
8994307f DG |
458 | if (stream->net_seq_idx == net_seq_idx) { |
459 | uatomic_set(&stream->endpoint_status, status); | |
32670d71 | 460 | stream->chan->metadata_pushed_wait_queue.wake_all(); |
f40b76ae | 461 | |
8994307f DG |
462 | DBG("Delete flag set to metadata stream %d", stream->wait_fd); |
463 | } | |
464 | } | |
465 | ||
466 | /* Follow up by the data streams */ | |
28ab034a | 467 | cds_lfht_for_each_entry (data_ht->ht, &iter.iter, stream, node.node) { |
8994307f DG |
468 | if (stream->net_seq_idx == net_seq_idx) { |
469 | uatomic_set(&stream->endpoint_status, status); | |
470 | DBG("Delete flag set to data stream %d", stream->wait_fd); | |
471 | } | |
472 | } | |
8994307f DG |
473 | } |
474 | ||
475 | /* | |
476 | * Cleanup a relayd object by flagging every associated streams for deletion, | |
477 | * destroying the object meaning removing it from the relayd hash table, | |
478 | * closing the sockets and freeing the memory in a RCU call. | |
479 | * | |
480 | * If a local data context is available, notify the threads that the streams' | |
481 | * state have changed. | |
482 | */ | |
9276e5c8 | 483 | void lttng_consumer_cleanup_relayd(struct consumer_relayd_sock_pair *relayd) |
8994307f | 484 | { |
da009f2c | 485 | uint64_t netidx; |
8994307f | 486 | |
a0377dfe | 487 | LTTNG_ASSERT(relayd); |
8994307f | 488 | |
97535efa | 489 | DBG("Cleaning up relayd object ID %" PRIu64, relayd->net_seq_idx); |
9617607b | 490 | |
8994307f DG |
491 | /* Save the net sequence index before destroying the object */ |
492 | netidx = relayd->net_seq_idx; | |
493 | ||
494 | /* | |
495 | * Delete the relayd from the relayd hash table, close the sockets and free | |
496 | * the object in a RCU call. | |
497 | */ | |
51230d70 | 498 | consumer_destroy_relayd(relayd); |
8994307f DG |
499 | |
500 | /* Set inactive endpoint to all streams */ | |
501 | update_endpoint_status_by_netidx(netidx, CONSUMER_ENDPOINT_INACTIVE); | |
502 | ||
503 | /* | |
504 | * With a local data context, notify the threads that the streams' state | |
505 | * have changed. The write() action on the pipe acts as an "implicit" | |
506 | * memory barrier ordering the updates of the end point status from the | |
507 | * read of this status which happens AFTER receiving this notify. | |
508 | */ | |
9276e5c8 JR |
509 | notify_thread_lttng_pipe(relayd->ctx->consumer_data_pipe); |
510 | notify_thread_lttng_pipe(relayd->ctx->consumer_metadata_pipe); | |
8994307f DG |
511 | } |
512 | ||
a6ba4fe1 DG |
513 | /* |
514 | * Flag a relayd socket pair for destruction. Destroy it if the refcount | |
515 | * reaches zero. | |
516 | * | |
517 | * RCU read side lock MUST be aquired before calling this function. | |
518 | */ | |
519 | void consumer_flag_relayd_for_destroy(struct consumer_relayd_sock_pair *relayd) | |
520 | { | |
a0377dfe | 521 | LTTNG_ASSERT(relayd); |
48b7cdc2 | 522 | ASSERT_RCU_READ_LOCKED(); |
a6ba4fe1 DG |
523 | |
524 | /* Set destroy flag for this object */ | |
525 | uatomic_set(&relayd->destroy_flag, 1); | |
526 | ||
527 | /* Destroy the relayd if refcount is 0 */ | |
528 | if (uatomic_read(&relayd->refcount) == 0) { | |
51230d70 | 529 | consumer_destroy_relayd(relayd); |
a6ba4fe1 DG |
530 | } |
531 | } | |
532 | ||
3bd1e081 | 533 | /* |
1d1a276c DG |
534 | * Completly destroy stream from every visiable data structure and the given |
535 | * hash table if one. | |
536 | * | |
537 | * One this call returns, the stream object is not longer usable nor visible. | |
3bd1e081 | 538 | */ |
28ab034a | 539 | void consumer_del_stream(struct lttng_consumer_stream *stream, struct lttng_ht *ht) |
3bd1e081 | 540 | { |
1d1a276c | 541 | consumer_stream_destroy(stream, ht); |
3bd1e081 MD |
542 | } |
543 | ||
5ab66908 MD |
544 | /* |
545 | * XXX naming of del vs destroy is all mixed up. | |
546 | */ | |
547 | void consumer_del_stream_for_data(struct lttng_consumer_stream *stream) | |
548 | { | |
549 | consumer_stream_destroy(stream, data_ht); | |
550 | } | |
551 | ||
552 | void consumer_del_stream_for_metadata(struct lttng_consumer_stream *stream) | |
553 | { | |
554 | consumer_stream_destroy(stream, metadata_ht); | |
555 | } | |
556 | ||
28ab034a JG |
557 | void consumer_stream_update_channel_attributes(struct lttng_consumer_stream *stream, |
558 | struct lttng_consumer_channel *channel) | |
d9a2e16e | 559 | { |
28ab034a | 560 | stream->channel_read_only_attributes.tracefile_size = channel->tracefile_size; |
d9a2e16e JD |
561 | } |
562 | ||
3bd1e081 MD |
563 | /* |
564 | * Add a stream to the global list protected by a mutex. | |
565 | */ | |
66d583dc | 566 | void consumer_add_data_stream(struct lttng_consumer_stream *stream) |
3bd1e081 | 567 | { |
5ab66908 | 568 | struct lttng_ht *ht = data_ht; |
3bd1e081 | 569 | |
a0377dfe FD |
570 | LTTNG_ASSERT(stream); |
571 | LTTNG_ASSERT(ht); | |
c77fc10a | 572 | |
d88aee68 | 573 | DBG3("Adding consumer stream %" PRIu64, stream->key); |
e316aad5 | 574 | |
fa29bfbf | 575 | pthread_mutex_lock(&the_consumer_data.lock); |
a9838785 | 576 | pthread_mutex_lock(&stream->chan->lock); |
ec6ea7d0 | 577 | pthread_mutex_lock(&stream->chan->timer_lock); |
2e818a6a | 578 | pthread_mutex_lock(&stream->lock); |
56047f5a | 579 | lttng::urcu::read_lock_guard read_lock; |
e316aad5 | 580 | |
43c34bc3 | 581 | /* Steal stream identifier to avoid having streams with the same key */ |
ffe60014 | 582 | steal_stream_key(stream->key, ht); |
43c34bc3 | 583 | |
d88aee68 | 584 | lttng_ht_add_unique_u64(ht, &stream->node); |
00e2e675 | 585 | |
28ab034a | 586 | lttng_ht_add_u64(the_consumer_data.stream_per_chan_id_ht, &stream->node_channel_id); |
d8ef542d | 587 | |
ca22feea DG |
588 | /* |
589 | * Add stream to the stream_list_ht of the consumer data. No need to steal | |
590 | * the key since the HT does not use it and we allow to add redundant keys | |
591 | * into this table. | |
592 | */ | |
28ab034a | 593 | lttng_ht_add_u64(the_consumer_data.stream_list_ht, &stream->node_session_id); |
ca22feea | 594 | |
e316aad5 | 595 | /* |
ffe60014 DG |
596 | * When nb_init_stream_left reaches 0, we don't need to trigger any action |
597 | * in terms of destroying the associated channel, because the action that | |
e316aad5 DG |
598 | * causes the count to become 0 also causes a stream to be added. The |
599 | * channel deletion will thus be triggered by the following removal of this | |
600 | * stream. | |
601 | */ | |
ffe60014 | 602 | if (uatomic_read(&stream->chan->nb_init_stream_left) > 0) { |
f2ad556d MD |
603 | /* Increment refcount before decrementing nb_init_stream_left */ |
604 | cmm_smp_wmb(); | |
ffe60014 | 605 | uatomic_dec(&stream->chan->nb_init_stream_left); |
e316aad5 DG |
606 | } |
607 | ||
608 | /* Update consumer data once the node is inserted. */ | |
fa29bfbf SM |
609 | the_consumer_data.stream_count++; |
610 | the_consumer_data.need_update = 1; | |
3bd1e081 | 611 | |
2e818a6a | 612 | pthread_mutex_unlock(&stream->lock); |
ec6ea7d0 | 613 | pthread_mutex_unlock(&stream->chan->timer_lock); |
a9838785 | 614 | pthread_mutex_unlock(&stream->chan->lock); |
fa29bfbf | 615 | pthread_mutex_unlock(&the_consumer_data.lock); |
3bd1e081 MD |
616 | } |
617 | ||
00e2e675 | 618 | /* |
3f8e211f DG |
619 | * Add relayd socket to global consumer data hashtable. RCU read side lock MUST |
620 | * be acquired before calling this. | |
00e2e675 | 621 | */ |
d09e1200 | 622 | static int add_relayd(struct consumer_relayd_sock_pair *relayd) |
00e2e675 DG |
623 | { |
624 | int ret = 0; | |
d88aee68 | 625 | struct lttng_ht_node_u64 *node; |
00e2e675 DG |
626 | struct lttng_ht_iter iter; |
627 | ||
a0377dfe | 628 | LTTNG_ASSERT(relayd); |
48b7cdc2 | 629 | ASSERT_RCU_READ_LOCKED(); |
00e2e675 | 630 | |
28ab034a | 631 | lttng_ht_lookup(the_consumer_data.relayd_ht, &relayd->net_seq_idx, &iter); |
00d7d903 | 632 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
cd9adb8b | 633 | if (node != nullptr) { |
00e2e675 DG |
634 | goto end; |
635 | } | |
fa29bfbf | 636 | lttng_ht_add_unique_u64(the_consumer_data.relayd_ht, &relayd->node); |
00e2e675 | 637 | |
00e2e675 DG |
638 | end: |
639 | return ret; | |
640 | } | |
641 | ||
642 | /* | |
643 | * Allocate and return a consumer relayd socket. | |
644 | */ | |
28ab034a | 645 | static struct consumer_relayd_sock_pair *consumer_allocate_relayd_sock_pair(uint64_t net_seq_idx) |
00e2e675 | 646 | { |
cd9adb8b | 647 | struct consumer_relayd_sock_pair *obj = nullptr; |
00e2e675 | 648 | |
da009f2c MD |
649 | /* net sequence index of -1 is a failure */ |
650 | if (net_seq_idx == (uint64_t) -1ULL) { | |
00e2e675 DG |
651 | goto error; |
652 | } | |
653 | ||
64803277 | 654 | obj = zmalloc<consumer_relayd_sock_pair>(); |
cd9adb8b | 655 | if (obj == nullptr) { |
00e2e675 DG |
656 | PERROR("zmalloc relayd sock"); |
657 | goto error; | |
658 | } | |
659 | ||
660 | obj->net_seq_idx = net_seq_idx; | |
661 | obj->refcount = 0; | |
173af62f | 662 | obj->destroy_flag = 0; |
f96e4545 MD |
663 | obj->control_sock.sock.fd = -1; |
664 | obj->data_sock.sock.fd = -1; | |
d88aee68 | 665 | lttng_ht_node_init_u64(&obj->node, obj->net_seq_idx); |
cd9adb8b | 666 | pthread_mutex_init(&obj->ctrl_sock_mutex, nullptr); |
00e2e675 DG |
667 | |
668 | error: | |
669 | return obj; | |
670 | } | |
671 | ||
672 | /* | |
673 | * Find a relayd socket pair in the global consumer data. | |
674 | * | |
675 | * Return the object if found else NULL. | |
b0b335c8 MD |
676 | * RCU read-side lock must be held across this call and while using the |
677 | * returned object. | |
00e2e675 | 678 | */ |
d88aee68 | 679 | struct consumer_relayd_sock_pair *consumer_find_relayd(uint64_t key) |
00e2e675 DG |
680 | { |
681 | struct lttng_ht_iter iter; | |
d88aee68 | 682 | struct lttng_ht_node_u64 *node; |
cd9adb8b | 683 | struct consumer_relayd_sock_pair *relayd = nullptr; |
00e2e675 | 684 | |
48b7cdc2 FD |
685 | ASSERT_RCU_READ_LOCKED(); |
686 | ||
00e2e675 | 687 | /* Negative keys are lookup failures */ |
d88aee68 | 688 | if (key == (uint64_t) -1ULL) { |
00e2e675 DG |
689 | goto error; |
690 | } | |
691 | ||
fa29bfbf | 692 | lttng_ht_lookup(the_consumer_data.relayd_ht, &key, &iter); |
00d7d903 | 693 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
cd9adb8b | 694 | if (node != nullptr) { |
0114db0e | 695 | relayd = lttng::utils::container_of(node, &consumer_relayd_sock_pair::node); |
00e2e675 DG |
696 | } |
697 | ||
00e2e675 DG |
698 | error: |
699 | return relayd; | |
700 | } | |
701 | ||
10a50311 JD |
702 | /* |
703 | * Find a relayd and send the stream | |
704 | * | |
705 | * Returns 0 on success, < 0 on error | |
706 | */ | |
28ab034a | 707 | int consumer_send_relayd_stream(struct lttng_consumer_stream *stream, char *path) |
10a50311 JD |
708 | { |
709 | int ret = 0; | |
710 | struct consumer_relayd_sock_pair *relayd; | |
711 | ||
a0377dfe FD |
712 | LTTNG_ASSERT(stream); |
713 | LTTNG_ASSERT(stream->net_seq_idx != -1ULL); | |
714 | LTTNG_ASSERT(path); | |
10a50311 JD |
715 | |
716 | /* The stream is not metadata. Get relayd reference if exists. */ | |
56047f5a | 717 | lttng::urcu::read_lock_guard read_lock; |
10a50311 | 718 | relayd = consumer_find_relayd(stream->net_seq_idx); |
cd9adb8b | 719 | if (relayd != nullptr) { |
10a50311 JD |
720 | /* Add stream on the relayd */ |
721 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
28ab034a JG |
722 | ret = relayd_add_stream(&relayd->control_sock, |
723 | stream->name, | |
724 | get_consumer_domain(), | |
725 | path, | |
726 | &stream->relayd_stream_id, | |
727 | stream->chan->tracefile_size, | |
728 | stream->chan->tracefile_count, | |
729 | stream->trace_chunk); | |
10a50311 JD |
730 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
731 | if (ret < 0) { | |
28ab034a JG |
732 | ERR("Relayd add stream failed. Cleaning up relayd %" PRIu64 ".", |
733 | relayd->net_seq_idx); | |
9276e5c8 | 734 | lttng_consumer_cleanup_relayd(relayd); |
10a50311 JD |
735 | goto end; |
736 | } | |
1c20f0e2 | 737 | |
10a50311 | 738 | uatomic_inc(&relayd->refcount); |
d01178b6 | 739 | stream->sent_to_relayd = 1; |
10a50311 JD |
740 | } else { |
741 | ERR("Stream %" PRIu64 " relayd ID %" PRIu64 " unknown. Can't send it.", | |
28ab034a JG |
742 | stream->key, |
743 | stream->net_seq_idx); | |
10a50311 JD |
744 | ret = -1; |
745 | goto end; | |
746 | } | |
747 | ||
748 | DBG("Stream %s with key %" PRIu64 " sent to relayd id %" PRIu64, | |
28ab034a JG |
749 | stream->name, |
750 | stream->key, | |
751 | stream->net_seq_idx); | |
10a50311 JD |
752 | |
753 | end: | |
10a50311 JD |
754 | return ret; |
755 | } | |
756 | ||
a4baae1b JD |
757 | /* |
758 | * Find a relayd and send the streams sent message | |
759 | * | |
760 | * Returns 0 on success, < 0 on error | |
761 | */ | |
762 | int consumer_send_relayd_streams_sent(uint64_t net_seq_idx) | |
763 | { | |
764 | int ret = 0; | |
765 | struct consumer_relayd_sock_pair *relayd; | |
766 | ||
a0377dfe | 767 | LTTNG_ASSERT(net_seq_idx != -1ULL); |
a4baae1b JD |
768 | |
769 | /* The stream is not metadata. Get relayd reference if exists. */ | |
56047f5a | 770 | lttng::urcu::read_lock_guard read_lock; |
a4baae1b | 771 | relayd = consumer_find_relayd(net_seq_idx); |
cd9adb8b | 772 | if (relayd != nullptr) { |
a4baae1b JD |
773 | /* Add stream on the relayd */ |
774 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
775 | ret = relayd_streams_sent(&relayd->control_sock); | |
776 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
777 | if (ret < 0) { | |
28ab034a JG |
778 | ERR("Relayd streams sent failed. Cleaning up relayd %" PRIu64 ".", |
779 | relayd->net_seq_idx); | |
9276e5c8 | 780 | lttng_consumer_cleanup_relayd(relayd); |
a4baae1b JD |
781 | goto end; |
782 | } | |
783 | } else { | |
28ab034a | 784 | ERR("Relayd ID %" PRIu64 " unknown. Can't send streams_sent.", net_seq_idx); |
a4baae1b JD |
785 | ret = -1; |
786 | goto end; | |
787 | } | |
788 | ||
789 | ret = 0; | |
790 | DBG("All streams sent relayd id %" PRIu64, net_seq_idx); | |
791 | ||
792 | end: | |
a4baae1b JD |
793 | return ret; |
794 | } | |
795 | ||
10a50311 JD |
796 | /* |
797 | * Find a relayd and close the stream | |
798 | */ | |
799 | void close_relayd_stream(struct lttng_consumer_stream *stream) | |
800 | { | |
801 | struct consumer_relayd_sock_pair *relayd; | |
802 | ||
803 | /* The stream is not metadata. Get relayd reference if exists. */ | |
56047f5a | 804 | lttng::urcu::read_lock_guard read_lock; |
10a50311 JD |
805 | relayd = consumer_find_relayd(stream->net_seq_idx); |
806 | if (relayd) { | |
807 | consumer_stream_relayd_close(stream, relayd); | |
808 | } | |
10a50311 JD |
809 | } |
810 | ||
00e2e675 DG |
811 | /* |
812 | * Handle stream for relayd transmission if the stream applies for network | |
813 | * streaming where the net sequence index is set. | |
814 | * | |
815 | * Return destination file descriptor or negative value on error. | |
816 | */ | |
6197aea7 | 817 | static int write_relayd_stream_header(struct lttng_consumer_stream *stream, |
28ab034a JG |
818 | size_t data_size, |
819 | unsigned long padding, | |
820 | struct consumer_relayd_sock_pair *relayd) | |
00e2e675 DG |
821 | { |
822 | int outfd = -1, ret; | |
00e2e675 DG |
823 | struct lttcomm_relayd_data_hdr data_hdr; |
824 | ||
825 | /* Safety net */ | |
a0377dfe FD |
826 | LTTNG_ASSERT(stream); |
827 | LTTNG_ASSERT(relayd); | |
00e2e675 DG |
828 | |
829 | /* Reset data header */ | |
830 | memset(&data_hdr, 0, sizeof(data_hdr)); | |
831 | ||
00e2e675 DG |
832 | if (stream->metadata_flag) { |
833 | /* Caller MUST acquire the relayd control socket lock */ | |
834 | ret = relayd_send_metadata(&relayd->control_sock, data_size); | |
835 | if (ret < 0) { | |
836 | goto error; | |
837 | } | |
838 | ||
839 | /* Metadata are always sent on the control socket. */ | |
6151a90f | 840 | outfd = relayd->control_sock.sock.fd; |
00e2e675 DG |
841 | } else { |
842 | /* Set header with stream information */ | |
843 | data_hdr.stream_id = htobe64(stream->relayd_stream_id); | |
844 | data_hdr.data_size = htobe32(data_size); | |
1d4dfdef | 845 | data_hdr.padding_size = htobe32(padding); |
c35f9726 | 846 | |
39df6d9f DG |
847 | /* |
848 | * Note that net_seq_num below is assigned with the *current* value of | |
849 | * next_net_seq_num and only after that the next_net_seq_num will be | |
850 | * increment. This is why when issuing a command on the relayd using | |
851 | * this next value, 1 should always be substracted in order to compare | |
852 | * the last seen sequence number on the relayd side to the last sent. | |
853 | */ | |
3604f373 | 854 | data_hdr.net_seq_num = htobe64(stream->next_net_seq_num); |
00e2e675 DG |
855 | /* Other fields are zeroed previously */ |
856 | ||
28ab034a | 857 | ret = relayd_send_data_hdr(&relayd->data_sock, &data_hdr, sizeof(data_hdr)); |
00e2e675 DG |
858 | if (ret < 0) { |
859 | goto error; | |
860 | } | |
861 | ||
3604f373 DG |
862 | ++stream->next_net_seq_num; |
863 | ||
00e2e675 | 864 | /* Set to go on data socket */ |
6151a90f | 865 | outfd = relayd->data_sock.sock.fd; |
00e2e675 DG |
866 | } |
867 | ||
868 | error: | |
869 | return outfd; | |
870 | } | |
871 | ||
b1316da1 JG |
872 | /* |
873 | * Write a character on the metadata poll pipe to wake the metadata thread. | |
874 | * Returns 0 on success, -1 on error. | |
875 | */ | |
876 | int consumer_metadata_wakeup_pipe(const struct lttng_consumer_channel *channel) | |
877 | { | |
878 | int ret = 0; | |
879 | ||
28ab034a | 880 | DBG("Waking up metadata poll thread (writing to pipe): channel name = '%s'", channel->name); |
b1316da1 JG |
881 | if (channel->monitor && channel->metadata_stream) { |
882 | const char dummy = 'c'; | |
28ab034a JG |
883 | const ssize_t write_ret = |
884 | lttng_write(channel->metadata_stream->ust_metadata_poll_pipe[1], &dummy, 1); | |
b1316da1 JG |
885 | |
886 | if (write_ret < 1) { | |
887 | if (errno == EWOULDBLOCK) { | |
888 | /* | |
889 | * This is fine, the metadata poll thread | |
890 | * is having a hard time keeping-up, but | |
891 | * it will eventually wake-up and consume | |
892 | * the available data. | |
893 | */ | |
894 | ret = 0; | |
895 | } else { | |
896 | PERROR("Failed to write to UST metadata pipe while attempting to wake-up the metadata poll thread"); | |
897 | ret = -1; | |
898 | goto end; | |
899 | } | |
900 | } | |
901 | } | |
902 | ||
903 | end: | |
904 | return ret; | |
905 | } | |
906 | ||
d2956687 JG |
907 | /* |
908 | * Trigger a dump of the metadata content. Following/during the succesful | |
909 | * completion of this call, the metadata poll thread will start receiving | |
910 | * metadata packets to consume. | |
911 | * | |
912 | * The caller must hold the channel and stream locks. | |
913 | */ | |
28ab034a | 914 | static int consumer_metadata_stream_dump(struct lttng_consumer_stream *stream) |
d2956687 JG |
915 | { |
916 | int ret; | |
917 | ||
918 | ASSERT_LOCKED(stream->chan->lock); | |
919 | ASSERT_LOCKED(stream->lock); | |
a0377dfe FD |
920 | LTTNG_ASSERT(stream->metadata_flag); |
921 | LTTNG_ASSERT(stream->chan->trace_chunk); | |
d2956687 | 922 | |
fa29bfbf | 923 | switch (the_consumer_data.type) { |
d2956687 JG |
924 | case LTTNG_CONSUMER_KERNEL: |
925 | /* | |
926 | * Reset the position of what has been read from the | |
927 | * metadata cache to 0 so we can dump it again. | |
928 | */ | |
929 | ret = kernctl_metadata_cache_dump(stream->wait_fd); | |
930 | break; | |
931 | case LTTNG_CONSUMER32_UST: | |
932 | case LTTNG_CONSUMER64_UST: | |
933 | /* | |
934 | * Reset the position pushed from the metadata cache so it | |
935 | * will write from the beginning on the next push. | |
936 | */ | |
937 | stream->ust_metadata_pushed = 0; | |
938 | ret = consumer_metadata_wakeup_pipe(stream->chan); | |
939 | break; | |
940 | default: | |
941 | ERR("Unknown consumer_data type"); | |
942 | abort(); | |
943 | } | |
944 | if (ret < 0) { | |
945 | ERR("Failed to dump the metadata cache"); | |
946 | } | |
947 | return ret; | |
948 | } | |
949 | ||
28ab034a JG |
950 | static int lttng_consumer_channel_set_trace_chunk(struct lttng_consumer_channel *channel, |
951 | struct lttng_trace_chunk *new_trace_chunk) | |
d2956687 | 952 | { |
d2956687 | 953 | pthread_mutex_lock(&channel->lock); |
b6921a17 JG |
954 | if (channel->is_deleted) { |
955 | /* | |
956 | * The channel has been logically deleted and should no longer | |
957 | * be used. It has released its reference to its current trace | |
958 | * chunk and should not acquire a new one. | |
959 | * | |
960 | * Return success as there is nothing for the caller to do. | |
961 | */ | |
962 | goto end; | |
963 | } | |
d2956687 JG |
964 | |
965 | /* | |
966 | * The acquisition of the reference cannot fail (barring | |
967 | * a severe internal error) since a reference to the published | |
968 | * chunk is already held by the caller. | |
969 | */ | |
970 | if (new_trace_chunk) { | |
28ab034a | 971 | const bool acquired_reference = lttng_trace_chunk_get(new_trace_chunk); |
d2956687 | 972 | |
a0377dfe | 973 | LTTNG_ASSERT(acquired_reference); |
d2956687 JG |
974 | } |
975 | ||
976 | lttng_trace_chunk_put(channel->trace_chunk); | |
977 | channel->trace_chunk = new_trace_chunk; | |
d2956687 JG |
978 | end: |
979 | pthread_mutex_unlock(&channel->lock); | |
ce1aa6fe | 980 | return 0; |
d2956687 JG |
981 | } |
982 | ||
3bd1e081 | 983 | /* |
ffe60014 DG |
984 | * Allocate and return a new lttng_consumer_channel object using the given key |
985 | * to initialize the hash table node. | |
986 | * | |
987 | * On error, return NULL. | |
3bd1e081 | 988 | */ |
886224ff | 989 | struct lttng_consumer_channel *consumer_allocate_channel(uint64_t key, |
28ab034a JG |
990 | uint64_t session_id, |
991 | const uint64_t *chunk_id, | |
992 | const char *pathname, | |
993 | const char *name, | |
994 | uint64_t relayd_id, | |
995 | enum lttng_event_output output, | |
996 | uint64_t tracefile_size, | |
997 | uint64_t tracefile_count, | |
998 | uint64_t session_id_per_pid, | |
999 | unsigned int monitor, | |
1000 | unsigned int live_timer_interval, | |
1001 | bool is_in_live_session, | |
1002 | const char *root_shm_path, | |
1003 | const char *shm_path) | |
3bd1e081 | 1004 | { |
cd9adb8b JG |
1005 | struct lttng_consumer_channel *channel = nullptr; |
1006 | struct lttng_trace_chunk *trace_chunk = nullptr; | |
d2956687 JG |
1007 | |
1008 | if (chunk_id) { | |
1009 | trace_chunk = lttng_trace_chunk_registry_find_chunk( | |
28ab034a | 1010 | the_consumer_data.chunk_registry, session_id, *chunk_id); |
d2956687 JG |
1011 | if (!trace_chunk) { |
1012 | ERR("Failed to find trace chunk reference during creation of channel"); | |
1013 | goto end; | |
1014 | } | |
1015 | } | |
3bd1e081 | 1016 | |
32670d71 JG |
1017 | try { |
1018 | channel = new lttng_consumer_channel; | |
1019 | } catch (const std::bad_alloc& e) { | |
1020 | ERR("Failed to allocate lttng_consumer_channel: %s", e.what()); | |
1021 | channel = nullptr; | |
3bd1e081 MD |
1022 | goto end; |
1023 | } | |
ffe60014 DG |
1024 | |
1025 | channel->key = key; | |
3bd1e081 | 1026 | channel->refcount = 0; |
ffe60014 | 1027 | channel->session_id = session_id; |
1950109e | 1028 | channel->session_id_per_pid = session_id_per_pid; |
ffe60014 | 1029 | channel->relayd_id = relayd_id; |
1624d5b7 JD |
1030 | channel->tracefile_size = tracefile_size; |
1031 | channel->tracefile_count = tracefile_count; | |
2bba9e53 | 1032 | channel->monitor = monitor; |
ecc48a90 | 1033 | channel->live_timer_interval = live_timer_interval; |
a2814ea7 | 1034 | channel->is_live = is_in_live_session; |
f40b76ae JG |
1035 | pthread_mutex_init(&channel->lock, NULL); |
1036 | pthread_mutex_init(&channel->timer_lock, NULL); | |
ffe60014 | 1037 | |
0c759fc9 DG |
1038 | switch (output) { |
1039 | case LTTNG_EVENT_SPLICE: | |
1040 | channel->output = CONSUMER_CHANNEL_SPLICE; | |
1041 | break; | |
1042 | case LTTNG_EVENT_MMAP: | |
1043 | channel->output = CONSUMER_CHANNEL_MMAP; | |
1044 | break; | |
1045 | default: | |
a0377dfe | 1046 | abort(); |
32670d71 | 1047 | delete channel; |
cd9adb8b | 1048 | channel = nullptr; |
0c759fc9 DG |
1049 | goto end; |
1050 | } | |
1051 | ||
07b86b52 JD |
1052 | /* |
1053 | * In monitor mode, the streams associated with the channel will be put in | |
1054 | * a special list ONLY owned by this channel. So, the refcount is set to 1 | |
1055 | * here meaning that the channel itself has streams that are referenced. | |
1056 | * | |
1057 | * On a channel deletion, once the channel is no longer visible, the | |
1058 | * refcount is decremented and checked for a zero value to delete it. With | |
1059 | * streams in no monitor mode, it will now be safe to destroy the channel. | |
1060 | */ | |
1061 | if (!channel->monitor) { | |
1062 | channel->refcount = 1; | |
1063 | } | |
1064 | ||
ffe60014 DG |
1065 | strncpy(channel->pathname, pathname, sizeof(channel->pathname)); |
1066 | channel->pathname[sizeof(channel->pathname) - 1] = '\0'; | |
1067 | ||
1068 | strncpy(channel->name, name, sizeof(channel->name)); | |
1069 | channel->name[sizeof(channel->name) - 1] = '\0'; | |
1070 | ||
3d071855 MD |
1071 | if (root_shm_path) { |
1072 | strncpy(channel->root_shm_path, root_shm_path, sizeof(channel->root_shm_path)); | |
1073 | channel->root_shm_path[sizeof(channel->root_shm_path) - 1] = '\0'; | |
1074 | } | |
d7ba1388 MD |
1075 | if (shm_path) { |
1076 | strncpy(channel->shm_path, shm_path, sizeof(channel->shm_path)); | |
1077 | channel->shm_path[sizeof(channel->shm_path) - 1] = '\0'; | |
1078 | } | |
1079 | ||
d88aee68 | 1080 | lttng_ht_node_init_u64(&channel->node, channel->key); |
28ab034a | 1081 | lttng_ht_node_init_u64(&channel->channels_by_session_id_ht_node, channel->session_id); |
d8ef542d MD |
1082 | |
1083 | channel->wait_fd = -1; | |
ffe60014 DG |
1084 | CDS_INIT_LIST_HEAD(&channel->streams.head); |
1085 | ||
d2956687 | 1086 | if (trace_chunk) { |
28ab034a | 1087 | int ret = lttng_consumer_channel_set_trace_chunk(channel, trace_chunk); |
d2956687 JG |
1088 | if (ret) { |
1089 | goto error; | |
1090 | } | |
1091 | } | |
1092 | ||
62a7b8ed | 1093 | DBG("Allocated channel (key %" PRIu64 ")", channel->key); |
3bd1e081 | 1094 | |
3bd1e081 | 1095 | end: |
d2956687 | 1096 | lttng_trace_chunk_put(trace_chunk); |
3bd1e081 | 1097 | return channel; |
d2956687 JG |
1098 | error: |
1099 | consumer_del_channel(channel); | |
cd9adb8b | 1100 | channel = nullptr; |
d2956687 | 1101 | goto end; |
3bd1e081 MD |
1102 | } |
1103 | ||
1104 | /* | |
1105 | * Add a channel to the global list protected by a mutex. | |
821fffb2 | 1106 | * |
b5a6470f | 1107 | * Always return 0 indicating success. |
3bd1e081 | 1108 | */ |
d8ef542d | 1109 | int consumer_add_channel(struct lttng_consumer_channel *channel, |
28ab034a | 1110 | struct lttng_consumer_local_data *ctx) |
3bd1e081 | 1111 | { |
fa29bfbf | 1112 | pthread_mutex_lock(&the_consumer_data.lock); |
a9838785 | 1113 | pthread_mutex_lock(&channel->lock); |
ec6ea7d0 | 1114 | pthread_mutex_lock(&channel->timer_lock); |
c77fc10a | 1115 | |
b5a6470f DG |
1116 | /* |
1117 | * This gives us a guarantee that the channel we are about to add to the | |
1118 | * channel hash table will be unique. See this function comment on the why | |
1119 | * we need to steel the channel key at this stage. | |
1120 | */ | |
1121 | steal_channel_key(channel->key); | |
c77fc10a | 1122 | |
56047f5a | 1123 | lttng::urcu::read_lock_guard read_lock; |
fa29bfbf SM |
1124 | lttng_ht_add_unique_u64(the_consumer_data.channel_ht, &channel->node); |
1125 | lttng_ht_add_u64(the_consumer_data.channels_by_session_id_ht, | |
28ab034a | 1126 | &channel->channels_by_session_id_ht_node); |
d2956687 | 1127 | channel->is_published = true; |
b5a6470f | 1128 | |
ec6ea7d0 | 1129 | pthread_mutex_unlock(&channel->timer_lock); |
a9838785 | 1130 | pthread_mutex_unlock(&channel->lock); |
fa29bfbf | 1131 | pthread_mutex_unlock(&the_consumer_data.lock); |
702b1ea4 | 1132 | |
b5a6470f | 1133 | if (channel->wait_fd != -1 && channel->type == CONSUMER_CHANNEL_TYPE_DATA) { |
a0cbdd2e | 1134 | notify_channel_pipe(ctx, channel, -1, CONSUMER_CHANNEL_ADD); |
d8ef542d | 1135 | } |
b5a6470f DG |
1136 | |
1137 | return 0; | |
3bd1e081 MD |
1138 | } |
1139 | ||
1140 | /* | |
1141 | * Allocate the pollfd structure and the local view of the out fds to avoid | |
1142 | * doing a lookup in the linked list and concurrency issues when writing is | |
1143 | * needed. Called with consumer_data.lock held. | |
1144 | * | |
1145 | * Returns the number of fds in the structures. | |
1146 | */ | |
ffe60014 | 1147 | static int update_poll_array(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
1148 | struct pollfd **pollfd, |
1149 | struct lttng_consumer_stream **local_stream, | |
1150 | struct lttng_ht *ht, | |
1151 | int *nb_inactive_fd) | |
3bd1e081 | 1152 | { |
3bd1e081 | 1153 | int i = 0; |
e4421fec DG |
1154 | struct lttng_ht_iter iter; |
1155 | struct lttng_consumer_stream *stream; | |
3bd1e081 | 1156 | |
a0377dfe FD |
1157 | LTTNG_ASSERT(ctx); |
1158 | LTTNG_ASSERT(ht); | |
1159 | LTTNG_ASSERT(pollfd); | |
1160 | LTTNG_ASSERT(local_stream); | |
ffe60014 | 1161 | |
3bd1e081 | 1162 | DBG("Updating poll fd array"); |
9a2fcf78 | 1163 | *nb_inactive_fd = 0; |
56047f5a JG |
1164 | |
1165 | { | |
1166 | lttng::urcu::read_lock_guard read_lock; | |
1167 | cds_lfht_for_each_entry (ht->ht, &iter.iter, stream, node.node) { | |
1168 | /* | |
1169 | * Only active streams with an active end point can be added to the | |
1170 | * poll set and local stream storage of the thread. | |
1171 | * | |
1172 | * There is a potential race here for endpoint_status to be updated | |
1173 | * just after the check. However, this is OK since the stream(s) will | |
1174 | * be deleted once the thread is notified that the end point state has | |
1175 | * changed where this function will be called back again. | |
1176 | * | |
1177 | * We track the number of inactive FDs because they still need to be | |
1178 | * closed by the polling thread after a wakeup on the data_pipe or | |
1179 | * metadata_pipe. | |
1180 | */ | |
1181 | if (stream->endpoint_status == CONSUMER_ENDPOINT_INACTIVE) { | |
1182 | (*nb_inactive_fd)++; | |
1183 | continue; | |
1184 | } | |
1185 | ||
1186 | (*pollfd)[i].fd = stream->wait_fd; | |
1187 | (*pollfd)[i].events = POLLIN | POLLPRI; | |
1188 | local_stream[i] = stream; | |
1189 | i++; | |
3bd1e081 | 1190 | } |
3bd1e081 MD |
1191 | } |
1192 | ||
1193 | /* | |
50f8ae69 | 1194 | * Insert the consumer_data_pipe at the end of the array and don't |
3bd1e081 MD |
1195 | * increment i so nb_fd is the number of real FD. |
1196 | */ | |
acdb9057 | 1197 | (*pollfd)[i].fd = lttng_pipe_get_readfd(ctx->consumer_data_pipe); |
509bb1cf | 1198 | (*pollfd)[i].events = POLLIN | POLLPRI; |
02b3d176 DG |
1199 | |
1200 | (*pollfd)[i + 1].fd = lttng_pipe_get_readfd(ctx->consumer_wakeup_pipe); | |
1201 | (*pollfd)[i + 1].events = POLLIN | POLLPRI; | |
3bd1e081 MD |
1202 | return i; |
1203 | } | |
1204 | ||
1205 | /* | |
84382d49 MD |
1206 | * Poll on the should_quit pipe and the command socket return -1 on |
1207 | * error, 1 if should exit, 0 if data is available on the command socket | |
3bd1e081 MD |
1208 | */ |
1209 | int lttng_consumer_poll_socket(struct pollfd *consumer_sockpoll) | |
1210 | { | |
1211 | int num_rdy; | |
1212 | ||
88f2b785 | 1213 | restart: |
3bd1e081 MD |
1214 | num_rdy = poll(consumer_sockpoll, 2, -1); |
1215 | if (num_rdy == -1) { | |
88f2b785 MD |
1216 | /* |
1217 | * Restart interrupted system call. | |
1218 | */ | |
1219 | if (errno == EINTR) { | |
1220 | goto restart; | |
1221 | } | |
7a57cf92 | 1222 | PERROR("Poll error"); |
84382d49 | 1223 | return -1; |
3bd1e081 | 1224 | } |
509bb1cf | 1225 | if (consumer_sockpoll[0].revents & (POLLIN | POLLPRI)) { |
3bd1e081 | 1226 | DBG("consumer_should_quit wake up"); |
84382d49 | 1227 | return 1; |
3bd1e081 MD |
1228 | } |
1229 | return 0; | |
3bd1e081 MD |
1230 | } |
1231 | ||
1232 | /* | |
1233 | * Set the error socket. | |
1234 | */ | |
28ab034a | 1235 | void lttng_consumer_set_error_sock(struct lttng_consumer_local_data *ctx, int sock) |
3bd1e081 MD |
1236 | { |
1237 | ctx->consumer_error_socket = sock; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * Set the command socket path. | |
1242 | */ | |
28ab034a | 1243 | void lttng_consumer_set_command_sock_path(struct lttng_consumer_local_data *ctx, char *sock) |
3bd1e081 MD |
1244 | { |
1245 | ctx->consumer_command_sock_path = sock; | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | * Send return code to the session daemon. | |
1250 | * If the socket is not defined, we return 0, it is not a fatal error | |
1251 | */ | |
fbd566c2 JG |
1252 | int lttng_consumer_send_error(struct lttng_consumer_local_data *ctx, |
1253 | enum lttcomm_return_code error_code) | |
3bd1e081 MD |
1254 | { |
1255 | if (ctx->consumer_error_socket > 0) { | |
fbd566c2 JG |
1256 | const std::int32_t comm_code = std::int32_t(error_code); |
1257 | ||
1258 | static_assert( | |
1259 | sizeof(comm_code) >= sizeof(std::underlying_type<lttcomm_return_code>), | |
1260 | "Fixed-size communication type too small to accomodate lttcomm_return_code"); | |
28ab034a | 1261 | return lttcomm_send_unix_sock( |
fbd566c2 | 1262 | ctx->consumer_error_socket, &comm_code, sizeof(comm_code)); |
3bd1e081 MD |
1263 | } |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
1268 | /* | |
228b5bf7 DG |
1269 | * Close all the tracefiles and stream fds and MUST be called when all |
1270 | * instances are destroyed i.e. when all threads were joined and are ended. | |
3bd1e081 | 1271 | */ |
cd9adb8b | 1272 | void lttng_consumer_cleanup() |
3bd1e081 | 1273 | { |
e4421fec | 1274 | struct lttng_ht_iter iter; |
ffe60014 | 1275 | struct lttng_consumer_channel *channel; |
e10aec8f | 1276 | unsigned int trace_chunks_left; |
6065ceec | 1277 | |
56047f5a JG |
1278 | { |
1279 | lttng::urcu::read_lock_guard read_lock; | |
3bd1e081 | 1280 | |
56047f5a JG |
1281 | cds_lfht_for_each_entry ( |
1282 | the_consumer_data.channel_ht->ht, &iter.iter, channel, node.node) { | |
1283 | consumer_del_channel(channel); | |
1284 | } | |
3bd1e081 | 1285 | } |
6065ceec | 1286 | |
fa29bfbf SM |
1287 | lttng_ht_destroy(the_consumer_data.channel_ht); |
1288 | lttng_ht_destroy(the_consumer_data.channels_by_session_id_ht); | |
228b5bf7 DG |
1289 | |
1290 | cleanup_relayd_ht(); | |
1291 | ||
fa29bfbf | 1292 | lttng_ht_destroy(the_consumer_data.stream_per_chan_id_ht); |
d8ef542d | 1293 | |
228b5bf7 DG |
1294 | /* |
1295 | * This HT contains streams that are freed by either the metadata thread or | |
1296 | * the data thread so we do *nothing* on the hash table and simply destroy | |
1297 | * it. | |
1298 | */ | |
fa29bfbf | 1299 | lttng_ht_destroy(the_consumer_data.stream_list_ht); |
28cc88f3 | 1300 | |
e10aec8f MD |
1301 | /* |
1302 | * Trace chunks in the registry may still exist if the session | |
1303 | * daemon has encountered an internal error and could not | |
1304 | * tear down its sessions and/or trace chunks properly. | |
1305 | * | |
1306 | * Release the session daemon's implicit reference to any remaining | |
1307 | * trace chunk and print an error if any trace chunk was found. Note | |
1308 | * that there are _no_ legitimate cases for trace chunks to be left, | |
1309 | * it is a leak. However, it can happen following a crash of the | |
1310 | * session daemon and not emptying the registry would cause an assertion | |
1311 | * to hit. | |
1312 | */ | |
28ab034a JG |
1313 | trace_chunks_left = |
1314 | lttng_trace_chunk_registry_put_each_chunk(the_consumer_data.chunk_registry); | |
e10aec8f MD |
1315 | if (trace_chunks_left) { |
1316 | ERR("%u trace chunks are leaked by lttng-consumerd. " | |
28ab034a JG |
1317 | "This can be caused by an internal error of the session daemon.", |
1318 | trace_chunks_left); | |
e10aec8f MD |
1319 | } |
1320 | /* Run all callbacks freeing each chunk. */ | |
1321 | rcu_barrier(); | |
fa29bfbf | 1322 | lttng_trace_chunk_registry_destroy(the_consumer_data.chunk_registry); |
3bd1e081 MD |
1323 | } |
1324 | ||
1325 | /* | |
1326 | * Called from signal handler. | |
1327 | */ | |
1328 | void lttng_consumer_should_exit(struct lttng_consumer_local_data *ctx) | |
1329 | { | |
6cd525e8 MD |
1330 | ssize_t ret; |
1331 | ||
10211f5c | 1332 | CMM_STORE_SHARED(consumer_quit, 1); |
6cd525e8 MD |
1333 | ret = lttng_write(ctx->consumer_should_quit[1], "4", 1); |
1334 | if (ret < 1) { | |
7a57cf92 | 1335 | PERROR("write consumer quit"); |
3bd1e081 | 1336 | } |
ab1027f4 DG |
1337 | |
1338 | DBG("Consumer flag that it should quit"); | |
3bd1e081 MD |
1339 | } |
1340 | ||
5199ffc4 JG |
1341 | /* |
1342 | * Flush pending writes to trace output disk file. | |
1343 | */ | |
28ab034a | 1344 | static void lttng_consumer_sync_trace_file(struct lttng_consumer_stream *stream, off_t orig_offset) |
3bd1e081 MD |
1345 | { |
1346 | int outfd = stream->out_fd; | |
1347 | ||
1348 | /* | |
1349 | * This does a blocking write-and-wait on any page that belongs to the | |
1350 | * subbuffer prior to the one we just wrote. | |
1351 | * Don't care about error values, as these are just hints and ways to | |
1352 | * limit the amount of page cache used. | |
1353 | */ | |
ffe60014 | 1354 | if (orig_offset < stream->max_sb_size) { |
3bd1e081 MD |
1355 | return; |
1356 | } | |
671e39d7 MJ |
1357 | lttng::io::hint_flush_range_dont_need_sync( |
1358 | outfd, orig_offset - stream->max_sb_size, stream->max_sb_size); | |
3bd1e081 MD |
1359 | } |
1360 | ||
1361 | /* | |
1362 | * Initialise the necessary environnement : | |
1363 | * - create a new context | |
1364 | * - create the poll_pipe | |
1365 | * - create the should_quit pipe (for signal handler) | |
1366 | * - create the thread pipe (for splice) | |
1367 | * | |
1368 | * Takes a function pointer as argument, this function is called when data is | |
1369 | * available on a buffer. This function is responsible to do the | |
1370 | * kernctl_get_next_subbuf, read the data with mmap or splice depending on the | |
1371 | * buffer configuration and then kernctl_put_next_subbuf at the end. | |
1372 | * | |
1373 | * Returns a pointer to the new context or NULL on error. | |
1374 | */ | |
28ab034a JG |
1375 | struct lttng_consumer_local_data * |
1376 | lttng_consumer_create(enum lttng_consumer_type type, | |
1377 | ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream, | |
1378 | struct lttng_consumer_local_data *ctx, | |
1379 | bool locked_by_caller), | |
1380 | int (*recv_channel)(struct lttng_consumer_channel *channel), | |
1381 | int (*recv_stream)(struct lttng_consumer_stream *stream), | |
1382 | int (*update_stream)(uint64_t stream_key, uint32_t state)) | |
3bd1e081 | 1383 | { |
d8ef542d | 1384 | int ret; |
3bd1e081 MD |
1385 | struct lttng_consumer_local_data *ctx; |
1386 | ||
a0377dfe | 1387 | LTTNG_ASSERT(the_consumer_data.type == LTTNG_CONSUMER_UNKNOWN || |
28ab034a | 1388 | the_consumer_data.type == type); |
fa29bfbf | 1389 | the_consumer_data.type = type; |
3bd1e081 | 1390 | |
64803277 | 1391 | ctx = zmalloc<lttng_consumer_local_data>(); |
cd9adb8b | 1392 | if (ctx == nullptr) { |
7a57cf92 | 1393 | PERROR("allocating context"); |
3bd1e081 MD |
1394 | goto error; |
1395 | } | |
1396 | ||
1397 | ctx->consumer_error_socket = -1; | |
331744e3 | 1398 | ctx->consumer_metadata_socket = -1; |
cd9adb8b | 1399 | pthread_mutex_init(&ctx->metadata_socket_lock, nullptr); |
3bd1e081 MD |
1400 | /* assign the callbacks */ |
1401 | ctx->on_buffer_ready = buffer_ready; | |
1402 | ctx->on_recv_channel = recv_channel; | |
1403 | ctx->on_recv_stream = recv_stream; | |
1404 | ctx->on_update_stream = update_stream; | |
1405 | ||
acdb9057 DG |
1406 | ctx->consumer_data_pipe = lttng_pipe_open(0); |
1407 | if (!ctx->consumer_data_pipe) { | |
3bd1e081 MD |
1408 | goto error_poll_pipe; |
1409 | } | |
1410 | ||
02b3d176 DG |
1411 | ctx->consumer_wakeup_pipe = lttng_pipe_open(0); |
1412 | if (!ctx->consumer_wakeup_pipe) { | |
1413 | goto error_wakeup_pipe; | |
1414 | } | |
1415 | ||
3bd1e081 MD |
1416 | ret = pipe(ctx->consumer_should_quit); |
1417 | if (ret < 0) { | |
7a57cf92 | 1418 | PERROR("Error creating recv pipe"); |
3bd1e081 MD |
1419 | goto error_quit_pipe; |
1420 | } | |
1421 | ||
d8ef542d MD |
1422 | ret = pipe(ctx->consumer_channel_pipe); |
1423 | if (ret < 0) { | |
1424 | PERROR("Error creating channel pipe"); | |
1425 | goto error_channel_pipe; | |
1426 | } | |
1427 | ||
13886d2d DG |
1428 | ctx->consumer_metadata_pipe = lttng_pipe_open(0); |
1429 | if (!ctx->consumer_metadata_pipe) { | |
fb3a43a9 DG |
1430 | goto error_metadata_pipe; |
1431 | } | |
3bd1e081 | 1432 | |
e9404c27 JG |
1433 | ctx->channel_monitor_pipe = -1; |
1434 | ||
fb3a43a9 | 1435 | return ctx; |
3bd1e081 | 1436 | |
fb3a43a9 | 1437 | error_metadata_pipe: |
d8ef542d MD |
1438 | utils_close_pipe(ctx->consumer_channel_pipe); |
1439 | error_channel_pipe: | |
d8ef542d | 1440 | utils_close_pipe(ctx->consumer_should_quit); |
3bd1e081 | 1441 | error_quit_pipe: |
02b3d176 DG |
1442 | lttng_pipe_destroy(ctx->consumer_wakeup_pipe); |
1443 | error_wakeup_pipe: | |
acdb9057 | 1444 | lttng_pipe_destroy(ctx->consumer_data_pipe); |
3bd1e081 MD |
1445 | error_poll_pipe: |
1446 | free(ctx); | |
1447 | error: | |
cd9adb8b | 1448 | return nullptr; |
3bd1e081 MD |
1449 | } |
1450 | ||
282dadbc MD |
1451 | /* |
1452 | * Iterate over all streams of the hashtable and free them properly. | |
1453 | */ | |
1454 | static void destroy_data_stream_ht(struct lttng_ht *ht) | |
1455 | { | |
1456 | struct lttng_ht_iter iter; | |
1457 | struct lttng_consumer_stream *stream; | |
1458 | ||
cd9adb8b | 1459 | if (ht == nullptr) { |
282dadbc MD |
1460 | return; |
1461 | } | |
1462 | ||
56047f5a JG |
1463 | { |
1464 | lttng::urcu::read_lock_guard read_lock; | |
1465 | cds_lfht_for_each_entry (ht->ht, &iter.iter, stream, node.node) { | |
1466 | /* | |
1467 | * Ignore return value since we are currently cleaning up so any error | |
1468 | * can't be handled. | |
1469 | */ | |
1470 | (void) consumer_del_stream(stream, ht); | |
1471 | } | |
282dadbc | 1472 | } |
282dadbc MD |
1473 | |
1474 | lttng_ht_destroy(ht); | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | * Iterate over all streams of the metadata hashtable and free them | |
1479 | * properly. | |
1480 | */ | |
1481 | static void destroy_metadata_stream_ht(struct lttng_ht *ht) | |
1482 | { | |
1483 | struct lttng_ht_iter iter; | |
1484 | struct lttng_consumer_stream *stream; | |
1485 | ||
cd9adb8b | 1486 | if (ht == nullptr) { |
282dadbc MD |
1487 | return; |
1488 | } | |
1489 | ||
56047f5a JG |
1490 | { |
1491 | lttng::urcu::read_lock_guard read_lock; | |
1492 | cds_lfht_for_each_entry (ht->ht, &iter.iter, stream, node.node) { | |
1493 | /* | |
1494 | * Ignore return value since we are currently cleaning up so any error | |
1495 | * can't be handled. | |
1496 | */ | |
1497 | (void) consumer_del_metadata_stream(stream, ht); | |
1498 | } | |
282dadbc | 1499 | } |
282dadbc MD |
1500 | |
1501 | lttng_ht_destroy(ht); | |
1502 | } | |
1503 | ||
3bd1e081 MD |
1504 | /* |
1505 | * Close all fds associated with the instance and free the context. | |
1506 | */ | |
1507 | void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx) | |
1508 | { | |
4c462e79 MD |
1509 | int ret; |
1510 | ||
ab1027f4 DG |
1511 | DBG("Consumer destroying it. Closing everything."); |
1512 | ||
4f2e75b9 DG |
1513 | if (!ctx) { |
1514 | return; | |
1515 | } | |
1516 | ||
282dadbc MD |
1517 | destroy_data_stream_ht(data_ht); |
1518 | destroy_metadata_stream_ht(metadata_ht); | |
1519 | ||
4c462e79 MD |
1520 | ret = close(ctx->consumer_error_socket); |
1521 | if (ret) { | |
1522 | PERROR("close"); | |
1523 | } | |
331744e3 JD |
1524 | ret = close(ctx->consumer_metadata_socket); |
1525 | if (ret) { | |
1526 | PERROR("close"); | |
1527 | } | |
d8ef542d | 1528 | utils_close_pipe(ctx->consumer_channel_pipe); |
acdb9057 | 1529 | lttng_pipe_destroy(ctx->consumer_data_pipe); |
13886d2d | 1530 | lttng_pipe_destroy(ctx->consumer_metadata_pipe); |
02b3d176 | 1531 | lttng_pipe_destroy(ctx->consumer_wakeup_pipe); |
d8ef542d | 1532 | utils_close_pipe(ctx->consumer_should_quit); |
fb3a43a9 | 1533 | |
3bd1e081 MD |
1534 | unlink(ctx->consumer_command_sock_path); |
1535 | free(ctx); | |
1536 | } | |
1537 | ||
6197aea7 DG |
1538 | /* |
1539 | * Write the metadata stream id on the specified file descriptor. | |
1540 | */ | |
28ab034a JG |
1541 | static int |
1542 | write_relayd_metadata_id(int fd, struct lttng_consumer_stream *stream, unsigned long padding) | |
6197aea7 | 1543 | { |
6cd525e8 | 1544 | ssize_t ret; |
1d4dfdef | 1545 | struct lttcomm_relayd_metadata_payload hdr; |
6197aea7 | 1546 | |
1d4dfdef DG |
1547 | hdr.stream_id = htobe64(stream->relayd_stream_id); |
1548 | hdr.padding_size = htobe32(padding); | |
6cd525e8 MD |
1549 | ret = lttng_write(fd, (void *) &hdr, sizeof(hdr)); |
1550 | if (ret < sizeof(hdr)) { | |
d7b75ec8 | 1551 | /* |
6f04ed72 | 1552 | * This error means that the fd's end is closed so ignore the PERROR |
d7b75ec8 DG |
1553 | * not to clubber the error output since this can happen in a normal |
1554 | * code path. | |
1555 | */ | |
1556 | if (errno != EPIPE) { | |
1557 | PERROR("write metadata stream id"); | |
1558 | } | |
1559 | DBG3("Consumer failed to write relayd metadata id (errno: %d)", errno); | |
534d2592 DG |
1560 | /* |
1561 | * Set ret to a negative value because if ret != sizeof(hdr), we don't | |
1562 | * handle writting the missing part so report that as an error and | |
1563 | * don't lie to the caller. | |
1564 | */ | |
1565 | ret = -1; | |
6197aea7 DG |
1566 | goto end; |
1567 | } | |
1d4dfdef | 1568 | DBG("Metadata stream id %" PRIu64 " with padding %lu written before data", |
28ab034a JG |
1569 | stream->relayd_stream_id, |
1570 | padding); | |
6197aea7 DG |
1571 | |
1572 | end: | |
6cd525e8 | 1573 | return (int) ret; |
6197aea7 DG |
1574 | } |
1575 | ||
3bd1e081 | 1576 | /* |
09e26845 DG |
1577 | * Mmap the ring buffer, read it and write the data to the tracefile. This is a |
1578 | * core function for writing trace buffers to either the local filesystem or | |
1579 | * the network. | |
1580 | * | |
d2956687 | 1581 | * It must be called with the stream and the channel lock held. |
79d4ffb7 | 1582 | * |
09e26845 | 1583 | * Careful review MUST be put if any changes occur! |
3bd1e081 MD |
1584 | * |
1585 | * Returns the number of bytes written | |
1586 | */ | |
28ab034a JG |
1587 | ssize_t lttng_consumer_on_read_subbuffer_mmap(struct lttng_consumer_stream *stream, |
1588 | const struct lttng_buffer_view *buffer, | |
1589 | unsigned long padding) | |
3bd1e081 | 1590 | { |
994ab360 | 1591 | ssize_t ret = 0; |
f02e1e8a DG |
1592 | off_t orig_offset = stream->out_fd_offset; |
1593 | /* Default is on the disk */ | |
1594 | int outfd = stream->out_fd; | |
cd9adb8b | 1595 | struct consumer_relayd_sock_pair *relayd = nullptr; |
8994307f | 1596 | unsigned int relayd_hang_up = 0; |
fd424d99 JG |
1597 | const size_t subbuf_content_size = buffer->size - padding; |
1598 | size_t write_len; | |
f02e1e8a DG |
1599 | |
1600 | /* RCU lock for the relayd pointer */ | |
56047f5a | 1601 | lttng::urcu::read_lock_guard read_lock; |
28ab034a | 1602 | LTTNG_ASSERT(stream->net_seq_idx != (uint64_t) -1ULL || stream->trace_chunk); |
d2956687 | 1603 | |
f02e1e8a | 1604 | /* Flag that the current stream if set for network streaming. */ |
da009f2c | 1605 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
f02e1e8a | 1606 | relayd = consumer_find_relayd(stream->net_seq_idx); |
cd9adb8b | 1607 | if (relayd == nullptr) { |
56591bac | 1608 | ret = -EPIPE; |
f02e1e8a DG |
1609 | goto end; |
1610 | } | |
1611 | } | |
1612 | ||
f02e1e8a DG |
1613 | /* Handle stream on the relayd if the output is on the network */ |
1614 | if (relayd) { | |
fd424d99 | 1615 | unsigned long netlen = subbuf_content_size; |
f02e1e8a DG |
1616 | |
1617 | /* | |
1618 | * Lock the control socket for the complete duration of the function | |
1619 | * since from this point on we will use the socket. | |
1620 | */ | |
1621 | if (stream->metadata_flag) { | |
1622 | /* Metadata requires the control socket. */ | |
1623 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
93ec662e JD |
1624 | if (stream->reset_metadata_flag) { |
1625 | ret = relayd_reset_metadata(&relayd->control_sock, | |
28ab034a JG |
1626 | stream->relayd_stream_id, |
1627 | stream->metadata_version); | |
93ec662e JD |
1628 | if (ret < 0) { |
1629 | relayd_hang_up = 1; | |
1630 | goto write_error; | |
1631 | } | |
1632 | stream->reset_metadata_flag = 0; | |
1633 | } | |
1d4dfdef | 1634 | netlen += sizeof(struct lttcomm_relayd_metadata_payload); |
f02e1e8a DG |
1635 | } |
1636 | ||
1d4dfdef | 1637 | ret = write_relayd_stream_header(stream, netlen, padding, relayd); |
994ab360 DG |
1638 | if (ret < 0) { |
1639 | relayd_hang_up = 1; | |
1640 | goto write_error; | |
1641 | } | |
1642 | /* Use the returned socket. */ | |
1643 | outfd = ret; | |
f02e1e8a | 1644 | |
994ab360 DG |
1645 | /* Write metadata stream id before payload */ |
1646 | if (stream->metadata_flag) { | |
239f61af | 1647 | ret = write_relayd_metadata_id(outfd, stream, padding); |
994ab360 | 1648 | if (ret < 0) { |
8994307f DG |
1649 | relayd_hang_up = 1; |
1650 | goto write_error; | |
1651 | } | |
f02e1e8a | 1652 | } |
1624d5b7 | 1653 | |
fd424d99 JG |
1654 | write_len = subbuf_content_size; |
1655 | } else { | |
1656 | /* No streaming; we have to write the full padding. */ | |
93ec662e JD |
1657 | if (stream->metadata_flag && stream->reset_metadata_flag) { |
1658 | ret = utils_truncate_stream_file(stream->out_fd, 0); | |
1659 | if (ret < 0) { | |
1660 | ERR("Reset metadata file"); | |
1661 | goto end; | |
1662 | } | |
1663 | stream->reset_metadata_flag = 0; | |
1664 | } | |
1665 | ||
1624d5b7 JD |
1666 | /* |
1667 | * Check if we need to change the tracefile before writing the packet. | |
1668 | */ | |
1669 | if (stream->chan->tracefile_size > 0 && | |
28ab034a JG |
1670 | (stream->tracefile_size_current + buffer->size) > |
1671 | stream->chan->tracefile_size) { | |
d2956687 JG |
1672 | ret = consumer_stream_rotate_output_files(stream); |
1673 | if (ret) { | |
1624d5b7 JD |
1674 | goto end; |
1675 | } | |
309167d2 | 1676 | outfd = stream->out_fd; |
a1ae300f | 1677 | orig_offset = 0; |
1624d5b7 | 1678 | } |
fd424d99 | 1679 | stream->tracefile_size_current += buffer->size; |
fd424d99 | 1680 | write_len = buffer->size; |
f02e1e8a DG |
1681 | } |
1682 | ||
d02b8372 DG |
1683 | /* |
1684 | * This call guarantee that len or less is returned. It's impossible to | |
1685 | * receive a ret value that is bigger than len. | |
1686 | */ | |
fd424d99 | 1687 | ret = lttng_write(outfd, buffer->data, write_len); |
e2d1190b | 1688 | DBG("Consumer mmap write() ret %zd (len %zu)", ret, write_len); |
fd424d99 | 1689 | if (ret < 0 || ((size_t) ret != write_len)) { |
d02b8372 DG |
1690 | /* |
1691 | * Report error to caller if nothing was written else at least send the | |
1692 | * amount written. | |
1693 | */ | |
1694 | if (ret < 0) { | |
994ab360 | 1695 | ret = -errno; |
f02e1e8a | 1696 | } |
994ab360 | 1697 | relayd_hang_up = 1; |
f02e1e8a | 1698 | |
d02b8372 | 1699 | /* Socket operation failed. We consider the relayd dead */ |
fcf0f774 | 1700 | if (errno == EPIPE) { |
d02b8372 DG |
1701 | /* |
1702 | * This is possible if the fd is closed on the other side | |
1703 | * (outfd) or any write problem. It can be verbose a bit for a | |
1704 | * normal execution if for instance the relayd is stopped | |
1705 | * abruptly. This can happen so set this to a DBG statement. | |
1706 | */ | |
1707 | DBG("Consumer mmap write detected relayd hang up"); | |
994ab360 DG |
1708 | } else { |
1709 | /* Unhandled error, print it and stop function right now. */ | |
28ab034a | 1710 | PERROR("Error in write mmap (ret %zd != write_len %zu)", ret, write_len); |
f02e1e8a | 1711 | } |
994ab360 | 1712 | goto write_error; |
d02b8372 DG |
1713 | } |
1714 | stream->output_written += ret; | |
d02b8372 DG |
1715 | |
1716 | /* This call is useless on a socket so better save a syscall. */ | |
1717 | if (!relayd) { | |
1718 | /* This won't block, but will start writeout asynchronously */ | |
671e39d7 | 1719 | lttng::io::hint_flush_range_async(outfd, stream->out_fd_offset, write_len); |
fd424d99 | 1720 | stream->out_fd_offset += write_len; |
f5dbe415 | 1721 | lttng_consumer_sync_trace_file(stream, orig_offset); |
f02e1e8a | 1722 | } |
f02e1e8a | 1723 | |
8994307f DG |
1724 | write_error: |
1725 | /* | |
1726 | * This is a special case that the relayd has closed its socket. Let's | |
1727 | * cleanup the relayd object and all associated streams. | |
1728 | */ | |
1729 | if (relayd && relayd_hang_up) { | |
28ab034a | 1730 | ERR("Relayd hangup. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); |
9276e5c8 | 1731 | lttng_consumer_cleanup_relayd(relayd); |
8994307f DG |
1732 | } |
1733 | ||
f02e1e8a DG |
1734 | end: |
1735 | /* Unlock only if ctrl socket used */ | |
1736 | if (relayd && stream->metadata_flag) { | |
1737 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
1738 | } | |
1739 | ||
994ab360 | 1740 | return ret; |
3bd1e081 MD |
1741 | } |
1742 | ||
1743 | /* | |
1744 | * Splice the data from the ring buffer to the tracefile. | |
1745 | * | |
79d4ffb7 DG |
1746 | * It must be called with the stream lock held. |
1747 | * | |
3bd1e081 MD |
1748 | * Returns the number of bytes spliced. |
1749 | */ | |
28ab034a JG |
1750 | ssize_t lttng_consumer_on_read_subbuffer_splice(struct lttng_consumer_local_data *ctx, |
1751 | struct lttng_consumer_stream *stream, | |
1752 | unsigned long len, | |
1753 | unsigned long padding) | |
3bd1e081 | 1754 | { |
f02e1e8a DG |
1755 | ssize_t ret = 0, written = 0, ret_splice = 0; |
1756 | loff_t offset = 0; | |
1757 | off_t orig_offset = stream->out_fd_offset; | |
1758 | int fd = stream->wait_fd; | |
1759 | /* Default is on the disk */ | |
1760 | int outfd = stream->out_fd; | |
cd9adb8b | 1761 | struct consumer_relayd_sock_pair *relayd = nullptr; |
fb3a43a9 | 1762 | int *splice_pipe; |
8994307f | 1763 | unsigned int relayd_hang_up = 0; |
f02e1e8a | 1764 | |
fa29bfbf | 1765 | switch (the_consumer_data.type) { |
3bd1e081 | 1766 | case LTTNG_CONSUMER_KERNEL: |
f02e1e8a | 1767 | break; |
7753dea8 MD |
1768 | case LTTNG_CONSUMER32_UST: |
1769 | case LTTNG_CONSUMER64_UST: | |
f02e1e8a | 1770 | /* Not supported for user space tracing */ |
3bd1e081 MD |
1771 | return -ENOSYS; |
1772 | default: | |
1773 | ERR("Unknown consumer_data type"); | |
a0377dfe | 1774 | abort(); |
3bd1e081 MD |
1775 | } |
1776 | ||
f02e1e8a | 1777 | /* RCU lock for the relayd pointer */ |
56047f5a | 1778 | lttng::urcu::read_lock_guard read_lock; |
f02e1e8a DG |
1779 | |
1780 | /* Flag that the current stream if set for network streaming. */ | |
da009f2c | 1781 | if (stream->net_seq_idx != (uint64_t) -1ULL) { |
f02e1e8a | 1782 | relayd = consumer_find_relayd(stream->net_seq_idx); |
cd9adb8b | 1783 | if (relayd == nullptr) { |
ad0b0d23 | 1784 | written = -ret; |
f02e1e8a DG |
1785 | goto end; |
1786 | } | |
1787 | } | |
a2361a61 | 1788 | splice_pipe = stream->splice_pipe; |
fb3a43a9 | 1789 | |
f02e1e8a | 1790 | /* Write metadata stream id before payload */ |
1d4dfdef | 1791 | if (relayd) { |
ad0b0d23 | 1792 | unsigned long total_len = len; |
f02e1e8a | 1793 | |
1d4dfdef DG |
1794 | if (stream->metadata_flag) { |
1795 | /* | |
1796 | * Lock the control socket for the complete duration of the function | |
1797 | * since from this point on we will use the socket. | |
1798 | */ | |
1799 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
1800 | ||
93ec662e JD |
1801 | if (stream->reset_metadata_flag) { |
1802 | ret = relayd_reset_metadata(&relayd->control_sock, | |
28ab034a JG |
1803 | stream->relayd_stream_id, |
1804 | stream->metadata_version); | |
93ec662e JD |
1805 | if (ret < 0) { |
1806 | relayd_hang_up = 1; | |
1807 | goto write_error; | |
1808 | } | |
1809 | stream->reset_metadata_flag = 0; | |
1810 | } | |
28ab034a | 1811 | ret = write_relayd_metadata_id(splice_pipe[1], stream, padding); |
1d4dfdef DG |
1812 | if (ret < 0) { |
1813 | written = ret; | |
ad0b0d23 DG |
1814 | relayd_hang_up = 1; |
1815 | goto write_error; | |
1d4dfdef DG |
1816 | } |
1817 | ||
1818 | total_len += sizeof(struct lttcomm_relayd_metadata_payload); | |
1819 | } | |
1820 | ||
1821 | ret = write_relayd_stream_header(stream, total_len, padding, relayd); | |
ad0b0d23 DG |
1822 | if (ret < 0) { |
1823 | written = ret; | |
1824 | relayd_hang_up = 1; | |
1825 | goto write_error; | |
f02e1e8a | 1826 | } |
ad0b0d23 DG |
1827 | /* Use the returned socket. */ |
1828 | outfd = ret; | |
1d4dfdef DG |
1829 | } else { |
1830 | /* No streaming, we have to set the len with the full padding */ | |
1831 | len += padding; | |
1624d5b7 | 1832 | |
93ec662e JD |
1833 | if (stream->metadata_flag && stream->reset_metadata_flag) { |
1834 | ret = utils_truncate_stream_file(stream->out_fd, 0); | |
1835 | if (ret < 0) { | |
1836 | ERR("Reset metadata file"); | |
1837 | goto end; | |
1838 | } | |
1839 | stream->reset_metadata_flag = 0; | |
1840 | } | |
1624d5b7 JD |
1841 | /* |
1842 | * Check if we need to change the tracefile before writing the packet. | |
1843 | */ | |
1844 | if (stream->chan->tracefile_size > 0 && | |
28ab034a | 1845 | (stream->tracefile_size_current + len) > stream->chan->tracefile_size) { |
d2956687 | 1846 | ret = consumer_stream_rotate_output_files(stream); |
1624d5b7 | 1847 | if (ret < 0) { |
ad0b0d23 | 1848 | written = ret; |
1624d5b7 JD |
1849 | goto end; |
1850 | } | |
309167d2 | 1851 | outfd = stream->out_fd; |
a1ae300f | 1852 | orig_offset = 0; |
1624d5b7 JD |
1853 | } |
1854 | stream->tracefile_size_current += len; | |
f02e1e8a DG |
1855 | } |
1856 | ||
1857 | while (len > 0) { | |
1d4dfdef | 1858 | DBG("splice chan to pipe offset %lu of len %lu (fd : %d, pipe: %d)", |
28ab034a JG |
1859 | (unsigned long) offset, |
1860 | len, | |
1861 | fd, | |
1862 | splice_pipe[1]); | |
1863 | ret_splice = splice( | |
cd9adb8b | 1864 | fd, &offset, splice_pipe[1], nullptr, len, SPLICE_F_MOVE | SPLICE_F_MORE); |
f02e1e8a DG |
1865 | DBG("splice chan to pipe, ret %zd", ret_splice); |
1866 | if (ret_splice < 0) { | |
d02b8372 | 1867 | ret = errno; |
ad0b0d23 | 1868 | written = -ret; |
d02b8372 | 1869 | PERROR("Error in relay splice"); |
f02e1e8a DG |
1870 | goto splice_error; |
1871 | } | |
1872 | ||
1873 | /* Handle stream on the relayd if the output is on the network */ | |
ad0b0d23 DG |
1874 | if (relayd && stream->metadata_flag) { |
1875 | size_t metadata_payload_size = | |
1876 | sizeof(struct lttcomm_relayd_metadata_payload); | |
1877 | ||
1878 | /* Update counter to fit the spliced data */ | |
1879 | ret_splice += metadata_payload_size; | |
1880 | len += metadata_payload_size; | |
1881 | /* | |
1882 | * We do this so the return value can match the len passed as | |
1883 | * argument to this function. | |
1884 | */ | |
1885 | written -= metadata_payload_size; | |
f02e1e8a DG |
1886 | } |
1887 | ||
1888 | /* Splice data out */ | |
28ab034a | 1889 | ret_splice = splice(splice_pipe[0], |
cd9adb8b | 1890 | nullptr, |
28ab034a | 1891 | outfd, |
cd9adb8b | 1892 | nullptr, |
28ab034a JG |
1893 | ret_splice, |
1894 | SPLICE_F_MOVE | SPLICE_F_MORE); | |
1895 | DBG("Consumer splice pipe to file (out_fd: %d), ret %zd", outfd, ret_splice); | |
f02e1e8a | 1896 | if (ret_splice < 0) { |
d02b8372 | 1897 | ret = errno; |
ad0b0d23 DG |
1898 | written = -ret; |
1899 | relayd_hang_up = 1; | |
1900 | goto write_error; | |
f02e1e8a | 1901 | } else if (ret_splice > len) { |
d02b8372 DG |
1902 | /* |
1903 | * We don't expect this code path to be executed but you never know | |
1904 | * so this is an extra protection agains a buggy splice(). | |
1905 | */ | |
f02e1e8a | 1906 | ret = errno; |
ad0b0d23 | 1907 | written += ret_splice; |
28ab034a | 1908 | PERROR("Wrote more data than requested %zd (len: %lu)", ret_splice, len); |
f02e1e8a | 1909 | goto splice_error; |
d02b8372 DG |
1910 | } else { |
1911 | /* All good, update current len and continue. */ | |
1912 | len -= ret_splice; | |
f02e1e8a | 1913 | } |
f02e1e8a DG |
1914 | |
1915 | /* This call is useless on a socket so better save a syscall. */ | |
1916 | if (!relayd) { | |
1917 | /* This won't block, but will start writeout asynchronously */ | |
671e39d7 | 1918 | lttng::io::hint_flush_range_async(outfd, stream->out_fd_offset, ret_splice); |
f02e1e8a DG |
1919 | stream->out_fd_offset += ret_splice; |
1920 | } | |
e5d1a9b3 | 1921 | stream->output_written += ret_splice; |
f02e1e8a DG |
1922 | written += ret_splice; |
1923 | } | |
f5dbe415 JG |
1924 | if (!relayd) { |
1925 | lttng_consumer_sync_trace_file(stream, orig_offset); | |
1926 | } | |
f02e1e8a DG |
1927 | goto end; |
1928 | ||
8994307f DG |
1929 | write_error: |
1930 | /* | |
1931 | * This is a special case that the relayd has closed its socket. Let's | |
1932 | * cleanup the relayd object and all associated streams. | |
1933 | */ | |
1934 | if (relayd && relayd_hang_up) { | |
28ab034a | 1935 | ERR("Relayd hangup. Cleaning up relayd %" PRIu64 ".", relayd->net_seq_idx); |
9276e5c8 | 1936 | lttng_consumer_cleanup_relayd(relayd); |
8994307f DG |
1937 | /* Skip splice error so the consumer does not fail */ |
1938 | goto end; | |
1939 | } | |
1940 | ||
f02e1e8a DG |
1941 | splice_error: |
1942 | /* send the appropriate error description to sessiond */ | |
1943 | switch (ret) { | |
f02e1e8a | 1944 | case EINVAL: |
f73fabfd | 1945 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_EINVAL); |
f02e1e8a DG |
1946 | break; |
1947 | case ENOMEM: | |
f73fabfd | 1948 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_ENOMEM); |
f02e1e8a DG |
1949 | break; |
1950 | case ESPIPE: | |
f73fabfd | 1951 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_SPLICE_ESPIPE); |
f02e1e8a DG |
1952 | break; |
1953 | } | |
1954 | ||
1955 | end: | |
1956 | if (relayd && stream->metadata_flag) { | |
1957 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
1958 | } | |
1959 | ||
f02e1e8a | 1960 | return written; |
3bd1e081 MD |
1961 | } |
1962 | ||
15055ce5 JD |
1963 | /* |
1964 | * Sample the snapshot positions for a specific fd | |
1965 | * | |
1966 | * Returns 0 on success, < 0 on error | |
1967 | */ | |
1968 | int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream *stream) | |
1969 | { | |
fa29bfbf | 1970 | switch (the_consumer_data.type) { |
15055ce5 JD |
1971 | case LTTNG_CONSUMER_KERNEL: |
1972 | return lttng_kconsumer_sample_snapshot_positions(stream); | |
1973 | case LTTNG_CONSUMER32_UST: | |
1974 | case LTTNG_CONSUMER64_UST: | |
1975 | return lttng_ustconsumer_sample_snapshot_positions(stream); | |
1976 | default: | |
1977 | ERR("Unknown consumer_data type"); | |
a0377dfe | 1978 | abort(); |
15055ce5 JD |
1979 | return -ENOSYS; |
1980 | } | |
1981 | } | |
3bd1e081 MD |
1982 | /* |
1983 | * Take a snapshot for a specific fd | |
1984 | * | |
1985 | * Returns 0 on success, < 0 on error | |
1986 | */ | |
ffe60014 | 1987 | int lttng_consumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 | 1988 | { |
fa29bfbf | 1989 | switch (the_consumer_data.type) { |
3bd1e081 | 1990 | case LTTNG_CONSUMER_KERNEL: |
ffe60014 | 1991 | return lttng_kconsumer_take_snapshot(stream); |
7753dea8 MD |
1992 | case LTTNG_CONSUMER32_UST: |
1993 | case LTTNG_CONSUMER64_UST: | |
ffe60014 | 1994 | return lttng_ustconsumer_take_snapshot(stream); |
3bd1e081 MD |
1995 | default: |
1996 | ERR("Unknown consumer_data type"); | |
a0377dfe | 1997 | abort(); |
3bd1e081 MD |
1998 | return -ENOSYS; |
1999 | } | |
3bd1e081 MD |
2000 | } |
2001 | ||
2002 | /* | |
2003 | * Get the produced position | |
2004 | * | |
2005 | * Returns 0 on success, < 0 on error | |
2006 | */ | |
28ab034a | 2007 | int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream *stream, unsigned long *pos) |
3bd1e081 | 2008 | { |
fa29bfbf | 2009 | switch (the_consumer_data.type) { |
3bd1e081 | 2010 | case LTTNG_CONSUMER_KERNEL: |
ffe60014 | 2011 | return lttng_kconsumer_get_produced_snapshot(stream, pos); |
7753dea8 MD |
2012 | case LTTNG_CONSUMER32_UST: |
2013 | case LTTNG_CONSUMER64_UST: | |
ffe60014 | 2014 | return lttng_ustconsumer_get_produced_snapshot(stream, pos); |
3bd1e081 MD |
2015 | default: |
2016 | ERR("Unknown consumer_data type"); | |
a0377dfe | 2017 | abort(); |
3bd1e081 MD |
2018 | return -ENOSYS; |
2019 | } | |
2020 | } | |
2021 | ||
15055ce5 JD |
2022 | /* |
2023 | * Get the consumed position (free-running counter position in bytes). | |
2024 | * | |
2025 | * Returns 0 on success, < 0 on error | |
2026 | */ | |
28ab034a | 2027 | int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, unsigned long *pos) |
15055ce5 | 2028 | { |
fa29bfbf | 2029 | switch (the_consumer_data.type) { |
15055ce5 JD |
2030 | case LTTNG_CONSUMER_KERNEL: |
2031 | return lttng_kconsumer_get_consumed_snapshot(stream, pos); | |
2032 | case LTTNG_CONSUMER32_UST: | |
2033 | case LTTNG_CONSUMER64_UST: | |
2034 | return lttng_ustconsumer_get_consumed_snapshot(stream, pos); | |
2035 | default: | |
2036 | ERR("Unknown consumer_data type"); | |
a0377dfe | 2037 | abort(); |
15055ce5 JD |
2038 | return -ENOSYS; |
2039 | } | |
2040 | } | |
2041 | ||
3bd1e081 | 2042 | int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
2043 | int sock, |
2044 | struct pollfd *consumer_sockpoll) | |
3bd1e081 | 2045 | { |
fa29bfbf | 2046 | switch (the_consumer_data.type) { |
3bd1e081 MD |
2047 | case LTTNG_CONSUMER_KERNEL: |
2048 | return lttng_kconsumer_recv_cmd(ctx, sock, consumer_sockpoll); | |
7753dea8 MD |
2049 | case LTTNG_CONSUMER32_UST: |
2050 | case LTTNG_CONSUMER64_UST: | |
3bd1e081 MD |
2051 | return lttng_ustconsumer_recv_cmd(ctx, sock, consumer_sockpoll); |
2052 | default: | |
2053 | ERR("Unknown consumer_data type"); | |
a0377dfe | 2054 | abort(); |
3bd1e081 MD |
2055 | return -ENOSYS; |
2056 | } | |
2057 | } | |
2058 | ||
cd9adb8b | 2059 | static void lttng_consumer_close_all_metadata() |
d88aee68 | 2060 | { |
fa29bfbf | 2061 | switch (the_consumer_data.type) { |
d88aee68 DG |
2062 | case LTTNG_CONSUMER_KERNEL: |
2063 | /* | |
2064 | * The Kernel consumer has a different metadata scheme so we don't | |
2065 | * close anything because the stream will be closed by the session | |
2066 | * daemon. | |
2067 | */ | |
2068 | break; | |
2069 | case LTTNG_CONSUMER32_UST: | |
2070 | case LTTNG_CONSUMER64_UST: | |
2071 | /* | |
2072 | * Close all metadata streams. The metadata hash table is passed and | |
2073 | * this call iterates over it by closing all wakeup fd. This is safe | |
2074 | * because at this point we are sure that the metadata producer is | |
2075 | * either dead or blocked. | |
2076 | */ | |
6d574024 | 2077 | lttng_ustconsumer_close_all_metadata(metadata_ht); |
d88aee68 DG |
2078 | break; |
2079 | default: | |
2080 | ERR("Unknown consumer_data type"); | |
a0377dfe | 2081 | abort(); |
d88aee68 DG |
2082 | } |
2083 | } | |
2084 | ||
fb3a43a9 DG |
2085 | /* |
2086 | * Clean up a metadata stream and free its memory. | |
2087 | */ | |
28ab034a | 2088 | void consumer_del_metadata_stream(struct lttng_consumer_stream *stream, struct lttng_ht *ht) |
fb3a43a9 | 2089 | { |
cd9adb8b | 2090 | struct lttng_consumer_channel *channel = nullptr; |
a6ef8ee6 | 2091 | bool free_channel = false; |
fb3a43a9 | 2092 | |
a0377dfe | 2093 | LTTNG_ASSERT(stream); |
fb3a43a9 DG |
2094 | /* |
2095 | * This call should NEVER receive regular stream. It must always be | |
2096 | * metadata stream and this is crucial for data structure synchronization. | |
2097 | */ | |
a0377dfe | 2098 | LTTNG_ASSERT(stream->metadata_flag); |
fb3a43a9 | 2099 | |
e316aad5 DG |
2100 | DBG3("Consumer delete metadata stream %d", stream->wait_fd); |
2101 | ||
fa29bfbf | 2102 | pthread_mutex_lock(&the_consumer_data.lock); |
a6ef8ee6 JG |
2103 | /* |
2104 | * Note that this assumes that a stream's channel is never changed and | |
2105 | * that the stream's lock doesn't need to be taken to sample its | |
2106 | * channel. | |
2107 | */ | |
2108 | channel = stream->chan; | |
2109 | pthread_mutex_lock(&channel->lock); | |
3dad2c0f | 2110 | pthread_mutex_lock(&stream->lock); |
a6ef8ee6 | 2111 | if (channel->metadata_cache) { |
081424af | 2112 | /* Only applicable to userspace consumers. */ |
a6ef8ee6 | 2113 | pthread_mutex_lock(&channel->metadata_cache->lock); |
081424af | 2114 | } |
8994307f | 2115 | |
6d574024 DG |
2116 | /* Remove any reference to that stream. */ |
2117 | consumer_stream_delete(stream, ht); | |
ca22feea | 2118 | |
6d574024 | 2119 | /* Close down everything including the relayd if one. */ |
d119bd01 | 2120 | consumer_stream_close_output(stream); |
6d574024 DG |
2121 | /* Destroy tracer buffers of the stream. */ |
2122 | consumer_stream_destroy_buffers(stream); | |
fb3a43a9 DG |
2123 | |
2124 | /* Atomically decrement channel refcount since other threads can use it. */ | |
28ab034a JG |
2125 | if (!uatomic_sub_return(&channel->refcount, 1) && |
2126 | !uatomic_read(&channel->nb_init_stream_left)) { | |
c30aaa51 | 2127 | /* Go for channel deletion! */ |
a6ef8ee6 | 2128 | free_channel = true; |
fb3a43a9 | 2129 | } |
cd9adb8b | 2130 | stream->chan = nullptr; |
fb3a43a9 | 2131 | |
73811ecc DG |
2132 | /* |
2133 | * Nullify the stream reference so it is not used after deletion. The | |
6d574024 DG |
2134 | * channel lock MUST be acquired before being able to check for a NULL |
2135 | * pointer value. | |
73811ecc | 2136 | */ |
cd9adb8b | 2137 | channel->metadata_stream = nullptr; |
32670d71 | 2138 | channel->metadata_pushed_wait_queue.wake_all(); |
73811ecc | 2139 | |
a6ef8ee6 JG |
2140 | if (channel->metadata_cache) { |
2141 | pthread_mutex_unlock(&channel->metadata_cache->lock); | |
081424af | 2142 | } |
3dad2c0f | 2143 | pthread_mutex_unlock(&stream->lock); |
a6ef8ee6 | 2144 | pthread_mutex_unlock(&channel->lock); |
fa29bfbf | 2145 | pthread_mutex_unlock(&the_consumer_data.lock); |
e316aad5 | 2146 | |
a6ef8ee6 JG |
2147 | if (free_channel) { |
2148 | consumer_del_channel(channel); | |
e316aad5 DG |
2149 | } |
2150 | ||
d2956687 | 2151 | lttng_trace_chunk_put(stream->trace_chunk); |
cd9adb8b | 2152 | stream->trace_chunk = nullptr; |
6d574024 | 2153 | consumer_stream_free(stream); |
fb3a43a9 DG |
2154 | } |
2155 | ||
2156 | /* | |
2157 | * Action done with the metadata stream when adding it to the consumer internal | |
2158 | * data structures to handle it. | |
2159 | */ | |
66d583dc | 2160 | void consumer_add_metadata_stream(struct lttng_consumer_stream *stream) |
fb3a43a9 | 2161 | { |
5ab66908 | 2162 | struct lttng_ht *ht = metadata_ht; |
76082088 | 2163 | struct lttng_ht_iter iter; |
d88aee68 | 2164 | struct lttng_ht_node_u64 *node; |
fb3a43a9 | 2165 | |
a0377dfe FD |
2166 | LTTNG_ASSERT(stream); |
2167 | LTTNG_ASSERT(ht); | |
e316aad5 | 2168 | |
d88aee68 | 2169 | DBG3("Adding metadata stream %" PRIu64 " to hash table", stream->key); |
e316aad5 | 2170 | |
fa29bfbf | 2171 | pthread_mutex_lock(&the_consumer_data.lock); |
a9838785 | 2172 | pthread_mutex_lock(&stream->chan->lock); |
ec6ea7d0 | 2173 | pthread_mutex_lock(&stream->chan->timer_lock); |
2e818a6a | 2174 | pthread_mutex_lock(&stream->lock); |
e316aad5 | 2175 | |
e316aad5 DG |
2176 | /* |
2177 | * From here, refcounts are updated so be _careful_ when returning an error | |
2178 | * after this point. | |
2179 | */ | |
2180 | ||
56047f5a | 2181 | lttng::urcu::read_lock_guard read_lock; |
76082088 DG |
2182 | |
2183 | /* | |
2184 | * Lookup the stream just to make sure it does not exist in our internal | |
2185 | * state. This should NEVER happen. | |
2186 | */ | |
d88aee68 | 2187 | lttng_ht_lookup(ht, &stream->key, &iter); |
00d7d903 | 2188 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
a0377dfe | 2189 | LTTNG_ASSERT(!node); |
76082088 | 2190 | |
e316aad5 | 2191 | /* |
ffe60014 DG |
2192 | * When nb_init_stream_left reaches 0, we don't need to trigger any action |
2193 | * in terms of destroying the associated channel, because the action that | |
e316aad5 DG |
2194 | * causes the count to become 0 also causes a stream to be added. The |
2195 | * channel deletion will thus be triggered by the following removal of this | |
2196 | * stream. | |
2197 | */ | |
ffe60014 | 2198 | if (uatomic_read(&stream->chan->nb_init_stream_left) > 0) { |
f2ad556d MD |
2199 | /* Increment refcount before decrementing nb_init_stream_left */ |
2200 | cmm_smp_wmb(); | |
ffe60014 | 2201 | uatomic_dec(&stream->chan->nb_init_stream_left); |
e316aad5 DG |
2202 | } |
2203 | ||
d88aee68 | 2204 | lttng_ht_add_unique_u64(ht, &stream->node); |
ca22feea | 2205 | |
28ab034a | 2206 | lttng_ht_add_u64(the_consumer_data.stream_per_chan_id_ht, &stream->node_channel_id); |
d8ef542d | 2207 | |
ca22feea DG |
2208 | /* |
2209 | * Add stream to the stream_list_ht of the consumer data. No need to steal | |
2210 | * the key since the HT does not use it and we allow to add redundant keys | |
2211 | * into this table. | |
2212 | */ | |
28ab034a | 2213 | lttng_ht_add_u64(the_consumer_data.stream_list_ht, &stream->node_session_id); |
ca22feea | 2214 | |
2e818a6a | 2215 | pthread_mutex_unlock(&stream->lock); |
a9838785 | 2216 | pthread_mutex_unlock(&stream->chan->lock); |
ec6ea7d0 | 2217 | pthread_mutex_unlock(&stream->chan->timer_lock); |
fa29bfbf | 2218 | pthread_mutex_unlock(&the_consumer_data.lock); |
fb3a43a9 DG |
2219 | } |
2220 | ||
8994307f DG |
2221 | /* |
2222 | * Delete data stream that are flagged for deletion (endpoint_status). | |
2223 | */ | |
cd9adb8b | 2224 | static void validate_endpoint_status_data_stream() |
8994307f DG |
2225 | { |
2226 | struct lttng_ht_iter iter; | |
2227 | struct lttng_consumer_stream *stream; | |
2228 | ||
2229 | DBG("Consumer delete flagged data stream"); | |
2230 | ||
56047f5a JG |
2231 | { |
2232 | lttng::urcu::read_lock_guard read_lock; | |
2233 | ||
2234 | cds_lfht_for_each_entry (data_ht->ht, &iter.iter, stream, node.node) { | |
2235 | /* Validate delete flag of the stream */ | |
2236 | if (stream->endpoint_status == CONSUMER_ENDPOINT_ACTIVE) { | |
2237 | continue; | |
2238 | } | |
2239 | /* Delete it right now */ | |
2240 | consumer_del_stream(stream, data_ht); | |
8994307f | 2241 | } |
8994307f | 2242 | } |
8994307f DG |
2243 | } |
2244 | ||
2245 | /* | |
2246 | * Delete metadata stream that are flagged for deletion (endpoint_status). | |
2247 | */ | |
28ab034a | 2248 | static void validate_endpoint_status_metadata_stream(struct lttng_poll_event *pollset) |
8994307f DG |
2249 | { |
2250 | struct lttng_ht_iter iter; | |
2251 | struct lttng_consumer_stream *stream; | |
2252 | ||
2253 | DBG("Consumer delete flagged metadata stream"); | |
2254 | ||
a0377dfe | 2255 | LTTNG_ASSERT(pollset); |
8994307f | 2256 | |
56047f5a JG |
2257 | { |
2258 | lttng::urcu::read_lock_guard read_lock; | |
2259 | cds_lfht_for_each_entry (metadata_ht->ht, &iter.iter, stream, node.node) { | |
2260 | /* Validate delete flag of the stream */ | |
2261 | if (stream->endpoint_status == CONSUMER_ENDPOINT_ACTIVE) { | |
2262 | continue; | |
2263 | } | |
2264 | /* | |
2265 | * Remove from pollset so the metadata thread can continue without | |
2266 | * blocking on a deleted stream. | |
2267 | */ | |
2268 | lttng_poll_del(pollset, stream->wait_fd); | |
8994307f | 2269 | |
56047f5a JG |
2270 | /* Delete it right now */ |
2271 | consumer_del_metadata_stream(stream, metadata_ht); | |
2272 | } | |
8994307f | 2273 | } |
8994307f DG |
2274 | } |
2275 | ||
fb3a43a9 DG |
2276 | /* |
2277 | * Thread polls on metadata file descriptor and write them on disk or on the | |
2278 | * network. | |
2279 | */ | |
7d980def | 2280 | void *consumer_thread_metadata_poll(void *data) |
fb3a43a9 | 2281 | { |
1fc79fb4 | 2282 | int ret, i, pollfd, err = -1; |
fb3a43a9 | 2283 | uint32_t revents, nb_fd; |
cd9adb8b | 2284 | struct lttng_consumer_stream *stream = nullptr; |
fb3a43a9 | 2285 | struct lttng_ht_iter iter; |
d88aee68 | 2286 | struct lttng_ht_node_u64 *node; |
fb3a43a9 | 2287 | struct lttng_poll_event events; |
97535efa | 2288 | struct lttng_consumer_local_data *ctx = (lttng_consumer_local_data *) data; |
fb3a43a9 DG |
2289 | ssize_t len; |
2290 | ||
2291 | rcu_register_thread(); | |
2292 | ||
1fc79fb4 MD |
2293 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_METADATA); |
2294 | ||
2d57de81 MD |
2295 | if (testpoint(consumerd_thread_metadata)) { |
2296 | goto error_testpoint; | |
2297 | } | |
2298 | ||
9ce5646a MD |
2299 | health_code_update(); |
2300 | ||
fb3a43a9 DG |
2301 | DBG("Thread metadata poll started"); |
2302 | ||
fb3a43a9 DG |
2303 | /* Size is set to 1 for the consumer_metadata pipe */ |
2304 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
2305 | if (ret < 0) { | |
2306 | ERR("Poll set creation failed"); | |
d8ef542d | 2307 | goto end_poll; |
fb3a43a9 DG |
2308 | } |
2309 | ||
28ab034a | 2310 | ret = lttng_poll_add(&events, lttng_pipe_get_readfd(ctx->consumer_metadata_pipe), LPOLLIN); |
fb3a43a9 DG |
2311 | if (ret < 0) { |
2312 | goto end; | |
2313 | } | |
2314 | ||
2315 | /* Main loop */ | |
2316 | DBG("Metadata main loop started"); | |
2317 | ||
cd9adb8b | 2318 | while (true) { |
28ab034a | 2319 | restart: |
7fa2082e | 2320 | health_code_update(); |
9ce5646a | 2321 | health_poll_entry(); |
7fa2082e | 2322 | DBG("Metadata poll wait"); |
fb3a43a9 | 2323 | ret = lttng_poll_wait(&events, -1); |
28ab034a | 2324 | DBG("Metadata poll return from wait with %d fd(s)", LTTNG_POLL_GETNB(&events)); |
9ce5646a | 2325 | health_poll_exit(); |
40063ead | 2326 | DBG("Metadata event caught in thread"); |
fb3a43a9 DG |
2327 | if (ret < 0) { |
2328 | if (errno == EINTR) { | |
40063ead | 2329 | ERR("Poll EINTR caught"); |
fb3a43a9 DG |
2330 | goto restart; |
2331 | } | |
d9607cd7 | 2332 | if (LTTNG_POLL_GETNB(&events) == 0) { |
28ab034a | 2333 | err = 0; /* All is OK */ |
d9607cd7 MD |
2334 | } |
2335 | goto end; | |
fb3a43a9 DG |
2336 | } |
2337 | ||
0d9c5d77 DG |
2338 | nb_fd = ret; |
2339 | ||
e316aad5 | 2340 | /* From here, the event is a metadata wait fd */ |
fb3a43a9 | 2341 | for (i = 0; i < nb_fd; i++) { |
9ce5646a MD |
2342 | health_code_update(); |
2343 | ||
fb3a43a9 DG |
2344 | revents = LTTNG_POLL_GETEV(&events, i); |
2345 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2346 | ||
13886d2d | 2347 | if (pollfd == lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)) { |
03e43155 | 2348 | if (revents & LPOLLIN) { |
13886d2d DG |
2349 | ssize_t pipe_len; |
2350 | ||
2351 | pipe_len = lttng_pipe_read(ctx->consumer_metadata_pipe, | |
28ab034a | 2352 | &stream, |
5c7248cd JG |
2353 | sizeof(stream)); /* NOLINT sizeof |
2354 | used on a | |
2355 | pointer. */ | |
2356 | if (pipe_len < sizeof(stream)) { /* NOLINT sizeof used on a | |
2357 | pointer. */ | |
03e43155 MD |
2358 | if (pipe_len < 0) { |
2359 | PERROR("read metadata stream"); | |
2360 | } | |
fb3a43a9 | 2361 | /* |
28ab034a JG |
2362 | * Remove the pipe from the poll set and continue |
2363 | * the loop since their might be data to consume. | |
fb3a43a9 | 2364 | */ |
28ab034a JG |
2365 | lttng_poll_del( |
2366 | &events, | |
2367 | lttng_pipe_get_readfd( | |
2368 | ctx->consumer_metadata_pipe)); | |
03e43155 | 2369 | lttng_pipe_read_close(ctx->consumer_metadata_pipe); |
fb3a43a9 DG |
2370 | continue; |
2371 | } | |
2372 | ||
8994307f | 2373 | /* A NULL stream means that the state has changed. */ |
cd9adb8b | 2374 | if (stream == nullptr) { |
8994307f DG |
2375 | /* Check for deleted streams. */ |
2376 | validate_endpoint_status_metadata_stream(&events); | |
3714380f | 2377 | goto restart; |
8994307f DG |
2378 | } |
2379 | ||
fb3a43a9 | 2380 | DBG("Adding metadata stream %d to poll set", |
28ab034a | 2381 | stream->wait_fd); |
fb3a43a9 | 2382 | |
fb3a43a9 | 2383 | /* Add metadata stream to the global poll events list */ |
28ab034a JG |
2384 | lttng_poll_add( |
2385 | &events, stream->wait_fd, LPOLLIN | LPOLLPRI); | |
2386 | } else if (revents & (LPOLLERR | LPOLLHUP)) { | |
03e43155 MD |
2387 | DBG("Metadata thread pipe hung up"); |
2388 | /* | |
2389 | * Remove the pipe from the poll set and continue the loop | |
2390 | * since their might be data to consume. | |
2391 | */ | |
28ab034a JG |
2392 | lttng_poll_del( |
2393 | &events, | |
2394 | lttng_pipe_get_readfd(ctx->consumer_metadata_pipe)); | |
03e43155 MD |
2395 | lttng_pipe_read_close(ctx->consumer_metadata_pipe); |
2396 | continue; | |
2397 | } else { | |
28ab034a JG |
2398 | ERR("Unexpected poll events %u for sock %d", |
2399 | revents, | |
2400 | pollfd); | |
03e43155 | 2401 | goto end; |
fb3a43a9 DG |
2402 | } |
2403 | ||
e316aad5 | 2404 | /* Handle other stream */ |
fb3a43a9 DG |
2405 | continue; |
2406 | } | |
2407 | ||
56047f5a | 2408 | lttng::urcu::read_lock_guard read_lock; |
d88aee68 DG |
2409 | { |
2410 | uint64_t tmp_id = (uint64_t) pollfd; | |
2411 | ||
2412 | lttng_ht_lookup(metadata_ht, &tmp_id, &iter); | |
2413 | } | |
00d7d903 | 2414 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
a0377dfe | 2415 | LTTNG_ASSERT(node); |
fb3a43a9 | 2416 | |
28ab034a | 2417 | stream = caa_container_of(node, struct lttng_consumer_stream, node); |
fb3a43a9 | 2418 | |
03e43155 MD |
2419 | if (revents & (LPOLLIN | LPOLLPRI)) { |
2420 | /* Get the data out of the metadata file descriptor */ | |
2421 | DBG("Metadata available on fd %d", pollfd); | |
a0377dfe | 2422 | LTTNG_ASSERT(stream->wait_fd == pollfd); |
03e43155 MD |
2423 | |
2424 | do { | |
2425 | health_code_update(); | |
2426 | ||
6f9449c2 | 2427 | len = ctx->on_buffer_ready(stream, ctx, false); |
03e43155 MD |
2428 | /* |
2429 | * We don't check the return value here since if we get | |
83f4233d | 2430 | * a negative len, it means an error occurred thus we |
03e43155 MD |
2431 | * simply remove it from the poll set and free the |
2432 | * stream. | |
2433 | */ | |
2434 | } while (len > 0); | |
2435 | ||
2436 | /* It's ok to have an unavailable sub-buffer */ | |
2437 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { | |
2438 | /* Clean up stream from consumer and free it. */ | |
2439 | lttng_poll_del(&events, stream->wait_fd); | |
2440 | consumer_del_metadata_stream(stream, metadata_ht); | |
2441 | } | |
2442 | } else if (revents & (LPOLLERR | LPOLLHUP)) { | |
e316aad5 | 2443 | DBG("Metadata fd %d is hup|err.", pollfd); |
fa29bfbf | 2444 | if (!stream->hangup_flush_done && |
28ab034a JG |
2445 | (the_consumer_data.type == LTTNG_CONSUMER32_UST || |
2446 | the_consumer_data.type == LTTNG_CONSUMER64_UST)) { | |
fb3a43a9 DG |
2447 | DBG("Attempting to flush and consume the UST buffers"); |
2448 | lttng_ustconsumer_on_stream_hangup(stream); | |
2449 | ||
2450 | /* We just flushed the stream now read it. */ | |
4bb94b75 | 2451 | do { |
9ce5646a MD |
2452 | health_code_update(); |
2453 | ||
6f9449c2 | 2454 | len = ctx->on_buffer_ready(stream, ctx, false); |
4bb94b75 | 2455 | /* |
28ab034a JG |
2456 | * We don't check the return value here since if we |
2457 | * get a negative len, it means an error occurred | |
2458 | * thus we simply remove it from the poll set and | |
2459 | * free the stream. | |
4bb94b75 DG |
2460 | */ |
2461 | } while (len > 0); | |
fb3a43a9 DG |
2462 | } |
2463 | ||
fb3a43a9 | 2464 | lttng_poll_del(&events, stream->wait_fd); |
e316aad5 DG |
2465 | /* |
2466 | * This call update the channel states, closes file descriptors | |
2467 | * and securely free the stream. | |
2468 | */ | |
2469 | consumer_del_metadata_stream(stream, metadata_ht); | |
03e43155 MD |
2470 | } else { |
2471 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
03e43155 | 2472 | goto end; |
fb3a43a9 | 2473 | } |
e316aad5 | 2474 | /* Release RCU lock for the stream looked up */ |
fb3a43a9 DG |
2475 | } |
2476 | } | |
2477 | ||
1fc79fb4 MD |
2478 | /* All is OK */ |
2479 | err = 0; | |
fb3a43a9 DG |
2480 | end: |
2481 | DBG("Metadata poll thread exiting"); | |
fb3a43a9 | 2482 | |
d8ef542d MD |
2483 | lttng_poll_clean(&events); |
2484 | end_poll: | |
2d57de81 | 2485 | error_testpoint: |
1fc79fb4 MD |
2486 | if (err) { |
2487 | health_error(); | |
2488 | ERR("Health error occurred in %s", __func__); | |
2489 | } | |
2490 | health_unregister(health_consumerd); | |
fb3a43a9 | 2491 | rcu_unregister_thread(); |
cd9adb8b | 2492 | return nullptr; |
fb3a43a9 DG |
2493 | } |
2494 | ||
3bd1e081 | 2495 | /* |
e4421fec | 2496 | * This thread polls the fds in the set to consume the data and write |
3bd1e081 MD |
2497 | * it to tracefile if necessary. |
2498 | */ | |
7d980def | 2499 | void *consumer_thread_data_poll(void *data) |
3bd1e081 | 2500 | { |
ff930959 | 2501 | int num_rdy, high_prio, ret, i, err = -1; |
cd9adb8b | 2502 | struct pollfd *pollfd = nullptr; |
3bd1e081 | 2503 | /* local view of the streams */ |
cd9adb8b | 2504 | struct lttng_consumer_stream **local_stream = nullptr, *new_stream = nullptr; |
3bd1e081 | 2505 | /* local view of consumer_data.fds_count */ |
8bdcc002 JG |
2506 | int nb_fd = 0; |
2507 | /* 2 for the consumer_data_pipe and wake up pipe */ | |
2508 | const int nb_pipes_fd = 2; | |
9a2fcf78 JD |
2509 | /* Number of FDs with CONSUMER_ENDPOINT_INACTIVE but still open. */ |
2510 | int nb_inactive_fd = 0; | |
97535efa | 2511 | struct lttng_consumer_local_data *ctx = (lttng_consumer_local_data *) data; |
00e2e675 | 2512 | ssize_t len; |
3bd1e081 | 2513 | |
e7b994a3 DG |
2514 | rcu_register_thread(); |
2515 | ||
1fc79fb4 MD |
2516 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_DATA); |
2517 | ||
2d57de81 MD |
2518 | if (testpoint(consumerd_thread_data)) { |
2519 | goto error_testpoint; | |
2520 | } | |
2521 | ||
9ce5646a MD |
2522 | health_code_update(); |
2523 | ||
64803277 | 2524 | local_stream = zmalloc<lttng_consumer_stream *>(); |
cd9adb8b | 2525 | if (local_stream == nullptr) { |
4df6c8cb MD |
2526 | PERROR("local_stream malloc"); |
2527 | goto end; | |
2528 | } | |
3bd1e081 | 2529 | |
cd9adb8b | 2530 | while (true) { |
9ce5646a MD |
2531 | health_code_update(); |
2532 | ||
3bd1e081 | 2533 | high_prio = 0; |
3bd1e081 MD |
2534 | |
2535 | /* | |
e4421fec | 2536 | * the fds set has been updated, we need to update our |
3bd1e081 MD |
2537 | * local array as well |
2538 | */ | |
fa29bfbf SM |
2539 | pthread_mutex_lock(&the_consumer_data.lock); |
2540 | if (the_consumer_data.need_update) { | |
0e428499 | 2541 | free(pollfd); |
cd9adb8b | 2542 | pollfd = nullptr; |
0e428499 DG |
2543 | |
2544 | free(local_stream); | |
cd9adb8b | 2545 | local_stream = nullptr; |
3bd1e081 | 2546 | |
8bdcc002 | 2547 | /* Allocate for all fds */ |
28ab034a JG |
2548 | pollfd = |
2549 | calloc<struct pollfd>(the_consumer_data.stream_count + nb_pipes_fd); | |
cd9adb8b | 2550 | if (pollfd == nullptr) { |
7a57cf92 | 2551 | PERROR("pollfd malloc"); |
fa29bfbf | 2552 | pthread_mutex_unlock(&the_consumer_data.lock); |
3bd1e081 MD |
2553 | goto end; |
2554 | } | |
2555 | ||
28ab034a JG |
2556 | local_stream = calloc<lttng_consumer_stream *>( |
2557 | the_consumer_data.stream_count + nb_pipes_fd); | |
cd9adb8b | 2558 | if (local_stream == nullptr) { |
7a57cf92 | 2559 | PERROR("local_stream malloc"); |
fa29bfbf | 2560 | pthread_mutex_unlock(&the_consumer_data.lock); |
3bd1e081 MD |
2561 | goto end; |
2562 | } | |
28ab034a JG |
2563 | ret = update_poll_array( |
2564 | ctx, &pollfd, local_stream, data_ht, &nb_inactive_fd); | |
3bd1e081 MD |
2565 | if (ret < 0) { |
2566 | ERR("Error in allocating pollfd or local_outfds"); | |
f73fabfd | 2567 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
fa29bfbf | 2568 | pthread_mutex_unlock(&the_consumer_data.lock); |
3bd1e081 MD |
2569 | goto end; |
2570 | } | |
2571 | nb_fd = ret; | |
fa29bfbf | 2572 | the_consumer_data.need_update = 0; |
3bd1e081 | 2573 | } |
fa29bfbf | 2574 | pthread_mutex_unlock(&the_consumer_data.lock); |
3bd1e081 | 2575 | |
4078b776 | 2576 | /* No FDs and consumer_quit, consumer_cleanup the thread */ |
28ab034a JG |
2577 | if (nb_fd == 0 && nb_inactive_fd == 0 && CMM_LOAD_SHARED(consumer_quit) == 1) { |
2578 | err = 0; /* All is OK */ | |
4078b776 MD |
2579 | goto end; |
2580 | } | |
3bd1e081 | 2581 | /* poll on the array of fds */ |
88f2b785 | 2582 | restart: |
261de637 | 2583 | DBG("polling on %d fd", nb_fd + nb_pipes_fd); |
cf0bcb51 JG |
2584 | if (testpoint(consumerd_thread_data_poll)) { |
2585 | goto end; | |
2586 | } | |
9ce5646a | 2587 | health_poll_entry(); |
261de637 | 2588 | num_rdy = poll(pollfd, nb_fd + nb_pipes_fd, -1); |
9ce5646a | 2589 | health_poll_exit(); |
3bd1e081 MD |
2590 | DBG("poll num_rdy : %d", num_rdy); |
2591 | if (num_rdy == -1) { | |
88f2b785 MD |
2592 | /* |
2593 | * Restart interrupted system call. | |
2594 | */ | |
2595 | if (errno == EINTR) { | |
2596 | goto restart; | |
2597 | } | |
7a57cf92 | 2598 | PERROR("Poll error"); |
f73fabfd | 2599 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
3bd1e081 MD |
2600 | goto end; |
2601 | } else if (num_rdy == 0) { | |
2602 | DBG("Polling thread timed out"); | |
2603 | goto end; | |
2604 | } | |
2605 | ||
80957876 JG |
2606 | if (caa_unlikely(data_consumption_paused)) { |
2607 | DBG("Data consumption paused, sleeping..."); | |
2608 | sleep(1); | |
2609 | goto restart; | |
2610 | } | |
2611 | ||
3bd1e081 | 2612 | /* |
50f8ae69 | 2613 | * If the consumer_data_pipe triggered poll go directly to the |
00e2e675 DG |
2614 | * beginning of the loop to update the array. We want to prioritize |
2615 | * array update over low-priority reads. | |
3bd1e081 | 2616 | */ |
509bb1cf | 2617 | if (pollfd[nb_fd].revents & (POLLIN | POLLPRI)) { |
ab30f567 | 2618 | ssize_t pipe_readlen; |
04fdd819 | 2619 | |
50f8ae69 | 2620 | DBG("consumer_data_pipe wake up"); |
5c7248cd JG |
2621 | pipe_readlen = lttng_pipe_read(ctx->consumer_data_pipe, |
2622 | &new_stream, | |
2623 | sizeof(new_stream)); /* NOLINT sizeof used on | |
2624 | a pointer. */ | |
2625 | if (pipe_readlen < sizeof(new_stream)) { /* NOLINT sizeof used on a pointer. | |
2626 | */ | |
6cd525e8 | 2627 | PERROR("Consumer data pipe"); |
23f5f35d DG |
2628 | /* Continue so we can at least handle the current stream(s). */ |
2629 | continue; | |
2630 | } | |
c869f647 DG |
2631 | |
2632 | /* | |
2633 | * If the stream is NULL, just ignore it. It's also possible that | |
2634 | * the sessiond poll thread changed the consumer_quit state and is | |
2635 | * waking us up to test it. | |
2636 | */ | |
cd9adb8b | 2637 | if (new_stream == nullptr) { |
8994307f | 2638 | validate_endpoint_status_data_stream(); |
c869f647 DG |
2639 | continue; |
2640 | } | |
2641 | ||
c869f647 | 2642 | /* Continue to update the local streams and handle prio ones */ |
3bd1e081 MD |
2643 | continue; |
2644 | } | |
2645 | ||
02b3d176 DG |
2646 | /* Handle wakeup pipe. */ |
2647 | if (pollfd[nb_fd + 1].revents & (POLLIN | POLLPRI)) { | |
2648 | char dummy; | |
2649 | ssize_t pipe_readlen; | |
2650 | ||
28ab034a JG |
2651 | pipe_readlen = |
2652 | lttng_pipe_read(ctx->consumer_wakeup_pipe, &dummy, sizeof(dummy)); | |
02b3d176 DG |
2653 | if (pipe_readlen < 0) { |
2654 | PERROR("Consumer data wakeup pipe"); | |
2655 | } | |
2656 | /* We've been awakened to handle stream(s). */ | |
2657 | ctx->has_wakeup = 0; | |
2658 | } | |
2659 | ||
3bd1e081 MD |
2660 | /* Take care of high priority channels first. */ |
2661 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2662 | health_code_update(); |
2663 | ||
cd9adb8b | 2664 | if (local_stream[i] == nullptr) { |
9617607b DG |
2665 | continue; |
2666 | } | |
fb3a43a9 | 2667 | if (pollfd[i].revents & POLLPRI) { |
d41f73b7 MD |
2668 | DBG("Urgent read on fd %d", pollfd[i].fd); |
2669 | high_prio = 1; | |
6f9449c2 | 2670 | len = ctx->on_buffer_ready(local_stream[i], ctx, false); |
d41f73b7 | 2671 | /* it's ok to have an unavailable sub-buffer */ |
b64403e3 | 2672 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { |
ab1027f4 DG |
2673 | /* Clean the stream and free it. */ |
2674 | consumer_del_stream(local_stream[i], data_ht); | |
cd9adb8b | 2675 | local_stream[i] = nullptr; |
4078b776 | 2676 | } else if (len > 0) { |
28ab034a JG |
2677 | local_stream[i]->has_data_left_to_be_read_before_teardown = |
2678 | 1; | |
d41f73b7 | 2679 | } |
3bd1e081 MD |
2680 | } |
2681 | } | |
2682 | ||
4078b776 MD |
2683 | /* |
2684 | * If we read high prio channel in this loop, try again | |
2685 | * for more high prio data. | |
2686 | */ | |
2687 | if (high_prio) { | |
3bd1e081 MD |
2688 | continue; |
2689 | } | |
2690 | ||
2691 | /* Take care of low priority channels. */ | |
4078b776 | 2692 | for (i = 0; i < nb_fd; i++) { |
9ce5646a MD |
2693 | health_code_update(); |
2694 | ||
cd9adb8b | 2695 | if (local_stream[i] == nullptr) { |
9617607b DG |
2696 | continue; |
2697 | } | |
28ab034a JG |
2698 | if ((pollfd[i].revents & POLLIN) || local_stream[i]->hangup_flush_done || |
2699 | local_stream[i]->has_data) { | |
4078b776 | 2700 | DBG("Normal read on fd %d", pollfd[i].fd); |
6f9449c2 | 2701 | len = ctx->on_buffer_ready(local_stream[i], ctx, false); |
4078b776 | 2702 | /* it's ok to have an unavailable sub-buffer */ |
b64403e3 | 2703 | if (len < 0 && len != -EAGAIN && len != -ENODATA) { |
ab1027f4 DG |
2704 | /* Clean the stream and free it. */ |
2705 | consumer_del_stream(local_stream[i], data_ht); | |
cd9adb8b | 2706 | local_stream[i] = nullptr; |
4078b776 | 2707 | } else if (len > 0) { |
28ab034a JG |
2708 | local_stream[i]->has_data_left_to_be_read_before_teardown = |
2709 | 1; | |
4078b776 MD |
2710 | } |
2711 | } | |
2712 | } | |
2713 | ||
2714 | /* Handle hangup and errors */ | |
2715 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2716 | health_code_update(); |
2717 | ||
cd9adb8b | 2718 | if (local_stream[i] == nullptr) { |
9617607b DG |
2719 | continue; |
2720 | } | |
28ab034a JG |
2721 | if (!local_stream[i]->hangup_flush_done && |
2722 | (pollfd[i].revents & (POLLHUP | POLLERR | POLLNVAL)) && | |
2723 | (the_consumer_data.type == LTTNG_CONSUMER32_UST || | |
2724 | the_consumer_data.type == LTTNG_CONSUMER64_UST)) { | |
4078b776 | 2725 | DBG("fd %d is hup|err|nval. Attempting flush and read.", |
28ab034a | 2726 | pollfd[i].fd); |
4078b776 MD |
2727 | lttng_ustconsumer_on_stream_hangup(local_stream[i]); |
2728 | /* Attempt read again, for the data we just flushed. */ | |
c715ddc9 | 2729 | local_stream[i]->has_data_left_to_be_read_before_teardown = 1; |
4078b776 MD |
2730 | } |
2731 | /* | |
c715ddc9 JG |
2732 | * When a stream's pipe dies (hup/err/nval), an "inactive producer" flush is |
2733 | * performed. This type of flush ensures that a new packet is produced no | |
2734 | * matter the consumed/produced positions are. | |
2735 | * | |
2736 | * This, in turn, causes the next pass to see that data available for the | |
2737 | * stream. When we come back here, we can be assured that all available | |
2738 | * data has been consumed and we can finally destroy the stream. | |
2739 | * | |
4078b776 MD |
2740 | * If the poll flag is HUP/ERR/NVAL and we have |
2741 | * read no data in this pass, we can remove the | |
2742 | * stream from its hash table. | |
2743 | */ | |
2744 | if ((pollfd[i].revents & POLLHUP)) { | |
2745 | DBG("Polling fd %d tells it has hung up.", pollfd[i].fd); | |
c715ddc9 | 2746 | if (!local_stream[i]->has_data_left_to_be_read_before_teardown) { |
43c34bc3 | 2747 | consumer_del_stream(local_stream[i], data_ht); |
cd9adb8b | 2748 | local_stream[i] = nullptr; |
4078b776 MD |
2749 | } |
2750 | } else if (pollfd[i].revents & POLLERR) { | |
2751 | ERR("Error returned in polling fd %d.", pollfd[i].fd); | |
c715ddc9 | 2752 | if (!local_stream[i]->has_data_left_to_be_read_before_teardown) { |
43c34bc3 | 2753 | consumer_del_stream(local_stream[i], data_ht); |
cd9adb8b | 2754 | local_stream[i] = nullptr; |
4078b776 MD |
2755 | } |
2756 | } else if (pollfd[i].revents & POLLNVAL) { | |
2757 | ERR("Polling fd %d tells fd is not open.", pollfd[i].fd); | |
c715ddc9 | 2758 | if (!local_stream[i]->has_data_left_to_be_read_before_teardown) { |
43c34bc3 | 2759 | consumer_del_stream(local_stream[i], data_ht); |
cd9adb8b | 2760 | local_stream[i] = nullptr; |
3bd1e081 MD |
2761 | } |
2762 | } | |
cd9adb8b | 2763 | if (local_stream[i] != nullptr) { |
c715ddc9 | 2764 | local_stream[i]->has_data_left_to_be_read_before_teardown = 0; |
9617607b | 2765 | } |
3bd1e081 MD |
2766 | } |
2767 | } | |
1fc79fb4 MD |
2768 | /* All is OK */ |
2769 | err = 0; | |
3bd1e081 MD |
2770 | end: |
2771 | DBG("polling thread exiting"); | |
0e428499 DG |
2772 | free(pollfd); |
2773 | free(local_stream); | |
fb3a43a9 DG |
2774 | |
2775 | /* | |
2776 | * Close the write side of the pipe so epoll_wait() in | |
7d980def DG |
2777 | * consumer_thread_metadata_poll can catch it. The thread is monitoring the |
2778 | * read side of the pipe. If we close them both, epoll_wait strangely does | |
2779 | * not return and could create a endless wait period if the pipe is the | |
2780 | * only tracked fd in the poll set. The thread will take care of closing | |
2781 | * the read side. | |
fb3a43a9 | 2782 | */ |
13886d2d | 2783 | (void) lttng_pipe_write_close(ctx->consumer_metadata_pipe); |
fb3a43a9 | 2784 | |
2d57de81 | 2785 | error_testpoint: |
1fc79fb4 MD |
2786 | if (err) { |
2787 | health_error(); | |
2788 | ERR("Health error occurred in %s", __func__); | |
2789 | } | |
2790 | health_unregister(health_consumerd); | |
2791 | ||
e7b994a3 | 2792 | rcu_unregister_thread(); |
cd9adb8b | 2793 | return nullptr; |
3bd1e081 MD |
2794 | } |
2795 | ||
d8ef542d MD |
2796 | /* |
2797 | * Close wake-up end of each stream belonging to the channel. This will | |
2798 | * allow the poll() on the stream read-side to detect when the | |
2799 | * write-side (application) finally closes them. | |
2800 | */ | |
28ab034a | 2801 | static void consumer_close_channel_streams(struct lttng_consumer_channel *channel) |
d8ef542d MD |
2802 | { |
2803 | struct lttng_ht *ht; | |
2804 | struct lttng_consumer_stream *stream; | |
2805 | struct lttng_ht_iter iter; | |
2806 | ||
fa29bfbf | 2807 | ht = the_consumer_data.stream_per_chan_id_ht; |
d8ef542d | 2808 | |
56047f5a | 2809 | lttng::urcu::read_lock_guard read_lock; |
d8ef542d | 2810 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
2811 | ht->hash_fct(&channel->key, lttng_ht_seed), |
2812 | ht->match_fct, | |
2813 | &channel->key, | |
2814 | &iter.iter, | |
2815 | stream, | |
2816 | node_channel_id.node) | |
2817 | { | |
f2ad556d MD |
2818 | /* |
2819 | * Protect against teardown with mutex. | |
2820 | */ | |
2821 | pthread_mutex_lock(&stream->lock); | |
2822 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
2823 | goto next; | |
2824 | } | |
fa29bfbf | 2825 | switch (the_consumer_data.type) { |
d8ef542d MD |
2826 | case LTTNG_CONSUMER_KERNEL: |
2827 | break; | |
2828 | case LTTNG_CONSUMER32_UST: | |
2829 | case LTTNG_CONSUMER64_UST: | |
b4a650f3 DG |
2830 | if (stream->metadata_flag) { |
2831 | /* Safe and protected by the stream lock. */ | |
2832 | lttng_ustconsumer_close_metadata(stream->chan); | |
2833 | } else { | |
2834 | /* | |
2835 | * Note: a mutex is taken internally within | |
2836 | * liblttng-ust-ctl to protect timer wakeup_fd | |
2837 | * use from concurrent close. | |
2838 | */ | |
2839 | lttng_ustconsumer_close_stream_wakeup(stream); | |
2840 | } | |
d8ef542d MD |
2841 | break; |
2842 | default: | |
2843 | ERR("Unknown consumer_data type"); | |
a0377dfe | 2844 | abort(); |
d8ef542d | 2845 | } |
f2ad556d MD |
2846 | next: |
2847 | pthread_mutex_unlock(&stream->lock); | |
d8ef542d | 2848 | } |
d8ef542d MD |
2849 | } |
2850 | ||
2851 | static void destroy_channel_ht(struct lttng_ht *ht) | |
2852 | { | |
2853 | struct lttng_ht_iter iter; | |
2854 | struct lttng_consumer_channel *channel; | |
2855 | int ret; | |
2856 | ||
cd9adb8b | 2857 | if (ht == nullptr) { |
d8ef542d MD |
2858 | return; |
2859 | } | |
2860 | ||
56047f5a JG |
2861 | { |
2862 | lttng::urcu::read_lock_guard read_lock; | |
2863 | ||
2864 | cds_lfht_for_each_entry (ht->ht, &iter.iter, channel, wait_fd_node.node) { | |
2865 | ret = lttng_ht_del(ht, &iter); | |
2866 | LTTNG_ASSERT(ret != 0); | |
2867 | } | |
d8ef542d | 2868 | } |
d8ef542d MD |
2869 | |
2870 | lttng_ht_destroy(ht); | |
2871 | } | |
2872 | ||
2873 | /* | |
2874 | * This thread polls the channel fds to detect when they are being | |
2875 | * closed. It closes all related streams if the channel is detected as | |
2876 | * closed. It is currently only used as a shim layer for UST because the | |
2877 | * consumerd needs to keep the per-stream wakeup end of pipes open for | |
2878 | * periodical flush. | |
2879 | */ | |
2880 | void *consumer_thread_channel_poll(void *data) | |
2881 | { | |
1fc79fb4 | 2882 | int ret, i, pollfd, err = -1; |
d8ef542d | 2883 | uint32_t revents, nb_fd; |
cd9adb8b | 2884 | struct lttng_consumer_channel *chan = nullptr; |
d8ef542d MD |
2885 | struct lttng_ht_iter iter; |
2886 | struct lttng_ht_node_u64 *node; | |
2887 | struct lttng_poll_event events; | |
97535efa | 2888 | struct lttng_consumer_local_data *ctx = (lttng_consumer_local_data *) data; |
d8ef542d MD |
2889 | struct lttng_ht *channel_ht; |
2890 | ||
2891 | rcu_register_thread(); | |
2892 | ||
1fc79fb4 MD |
2893 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_CHANNEL); |
2894 | ||
2d57de81 MD |
2895 | if (testpoint(consumerd_thread_channel)) { |
2896 | goto error_testpoint; | |
2897 | } | |
2898 | ||
9ce5646a MD |
2899 | health_code_update(); |
2900 | ||
d8ef542d MD |
2901 | channel_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
2902 | if (!channel_ht) { | |
2903 | /* ENOMEM at this point. Better to bail out. */ | |
2904 | goto end_ht; | |
2905 | } | |
2906 | ||
2907 | DBG("Thread channel poll started"); | |
2908 | ||
2909 | /* Size is set to 1 for the consumer_channel pipe */ | |
2910 | ret = lttng_poll_create(&events, 2, LTTNG_CLOEXEC); | |
2911 | if (ret < 0) { | |
2912 | ERR("Poll set creation failed"); | |
2913 | goto end_poll; | |
2914 | } | |
2915 | ||
2916 | ret = lttng_poll_add(&events, ctx->consumer_channel_pipe[0], LPOLLIN); | |
2917 | if (ret < 0) { | |
2918 | goto end; | |
2919 | } | |
2920 | ||
2921 | /* Main loop */ | |
2922 | DBG("Channel main loop started"); | |
2923 | ||
cd9adb8b | 2924 | while (true) { |
28ab034a | 2925 | restart: |
7fa2082e MD |
2926 | health_code_update(); |
2927 | DBG("Channel poll wait"); | |
9ce5646a | 2928 | health_poll_entry(); |
d8ef542d | 2929 | ret = lttng_poll_wait(&events, -1); |
28ab034a | 2930 | DBG("Channel poll return from wait with %d fd(s)", LTTNG_POLL_GETNB(&events)); |
9ce5646a | 2931 | health_poll_exit(); |
40063ead | 2932 | DBG("Channel event caught in thread"); |
d8ef542d MD |
2933 | if (ret < 0) { |
2934 | if (errno == EINTR) { | |
40063ead | 2935 | ERR("Poll EINTR caught"); |
d8ef542d MD |
2936 | goto restart; |
2937 | } | |
d9607cd7 | 2938 | if (LTTNG_POLL_GETNB(&events) == 0) { |
28ab034a | 2939 | err = 0; /* All is OK */ |
d9607cd7 | 2940 | } |
d8ef542d MD |
2941 | goto end; |
2942 | } | |
2943 | ||
2944 | nb_fd = ret; | |
2945 | ||
2946 | /* From here, the event is a channel wait fd */ | |
2947 | for (i = 0; i < nb_fd; i++) { | |
9ce5646a MD |
2948 | health_code_update(); |
2949 | ||
d8ef542d MD |
2950 | revents = LTTNG_POLL_GETEV(&events, i); |
2951 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2952 | ||
d8ef542d | 2953 | if (pollfd == ctx->consumer_channel_pipe[0]) { |
03e43155 | 2954 | if (revents & LPOLLIN) { |
d8ef542d | 2955 | enum consumer_channel_action action; |
a0cbdd2e | 2956 | uint64_t key; |
d8ef542d | 2957 | |
a0cbdd2e | 2958 | ret = read_channel_pipe(ctx, &chan, &key, &action); |
d8ef542d | 2959 | if (ret <= 0) { |
03e43155 MD |
2960 | if (ret < 0) { |
2961 | ERR("Error reading channel pipe"); | |
2962 | } | |
28ab034a JG |
2963 | lttng_poll_del(&events, |
2964 | ctx->consumer_channel_pipe[0]); | |
d8ef542d MD |
2965 | continue; |
2966 | } | |
2967 | ||
2968 | switch (action) { | |
2969 | case CONSUMER_CHANNEL_ADD: | |
56047f5a | 2970 | { |
28ab034a | 2971 | DBG("Adding channel %d to poll set", chan->wait_fd); |
d8ef542d MD |
2972 | |
2973 | lttng_ht_node_init_u64(&chan->wait_fd_node, | |
28ab034a | 2974 | chan->wait_fd); |
56047f5a | 2975 | lttng::urcu::read_lock_guard read_lock; |
d8ef542d | 2976 | lttng_ht_add_unique_u64(channel_ht, |
28ab034a | 2977 | &chan->wait_fd_node); |
d8ef542d | 2978 | /* Add channel to the global poll events list */ |
28ab034a JG |
2979 | // FIXME: Empty flag on a pipe pollset, this might |
2980 | // hang on FreeBSD. | |
1524f98c | 2981 | lttng_poll_add(&events, chan->wait_fd, 0); |
d8ef542d | 2982 | break; |
56047f5a | 2983 | } |
a0cbdd2e MD |
2984 | case CONSUMER_CHANNEL_DEL: |
2985 | { | |
b4a650f3 | 2986 | /* |
28ab034a JG |
2987 | * This command should never be called if the |
2988 | * channel has streams monitored by either the data | |
2989 | * or metadata thread. The consumer only notify this | |
2990 | * thread with a channel del. command if it receives | |
2991 | * a destroy channel command from the session daemon | |
2992 | * that send it if a command prior to the | |
2993 | * GET_CHANNEL failed. | |
b4a650f3 DG |
2994 | */ |
2995 | ||
56047f5a | 2996 | lttng::urcu::read_lock_guard read_lock; |
a0cbdd2e MD |
2997 | chan = consumer_find_channel(key); |
2998 | if (!chan) { | |
28ab034a JG |
2999 | ERR("UST consumer get channel key %" PRIu64 |
3000 | " not found for del channel", | |
3001 | key); | |
a0cbdd2e MD |
3002 | break; |
3003 | } | |
3004 | lttng_poll_del(&events, chan->wait_fd); | |
f623cc0b | 3005 | iter.iter.node = &chan->wait_fd_node.node; |
a0cbdd2e | 3006 | ret = lttng_ht_del(channel_ht, &iter); |
a0377dfe | 3007 | LTTNG_ASSERT(ret == 0); |
a0cbdd2e | 3008 | |
fa29bfbf | 3009 | switch (the_consumer_data.type) { |
f2a444f1 DG |
3010 | case LTTNG_CONSUMER_KERNEL: |
3011 | break; | |
3012 | case LTTNG_CONSUMER32_UST: | |
3013 | case LTTNG_CONSUMER64_UST: | |
212d67a2 | 3014 | health_code_update(); |
28ab034a JG |
3015 | /* Destroy streams that might have been left |
3016 | * in the stream list. */ | |
212d67a2 | 3017 | clean_channel_stream_list(chan); |
f2a444f1 DG |
3018 | break; |
3019 | default: | |
3020 | ERR("Unknown consumer_data type"); | |
a0377dfe | 3021 | abort(); |
f2a444f1 DG |
3022 | } |
3023 | ||
a0cbdd2e | 3024 | /* |
28ab034a JG |
3025 | * Release our own refcount. Force channel deletion |
3026 | * even if streams were not initialized. | |
a0cbdd2e MD |
3027 | */ |
3028 | if (!uatomic_sub_return(&chan->refcount, 1)) { | |
3029 | consumer_del_channel(chan); | |
3030 | } | |
3031 | goto restart; | |
3032 | } | |
d8ef542d MD |
3033 | case CONSUMER_CHANNEL_QUIT: |
3034 | /* | |
28ab034a JG |
3035 | * Remove the pipe from the poll set and continue |
3036 | * the loop since their might be data to consume. | |
d8ef542d | 3037 | */ |
28ab034a JG |
3038 | lttng_poll_del(&events, |
3039 | ctx->consumer_channel_pipe[0]); | |
d8ef542d MD |
3040 | continue; |
3041 | default: | |
3042 | ERR("Unknown action"); | |
3043 | break; | |
3044 | } | |
03e43155 MD |
3045 | } else if (revents & (LPOLLERR | LPOLLHUP)) { |
3046 | DBG("Channel thread pipe hung up"); | |
3047 | /* | |
3048 | * Remove the pipe from the poll set and continue the loop | |
3049 | * since their might be data to consume. | |
3050 | */ | |
3051 | lttng_poll_del(&events, ctx->consumer_channel_pipe[0]); | |
3052 | continue; | |
3053 | } else { | |
28ab034a JG |
3054 | ERR("Unexpected poll events %u for sock %d", |
3055 | revents, | |
3056 | pollfd); | |
03e43155 | 3057 | goto end; |
d8ef542d MD |
3058 | } |
3059 | ||
3060 | /* Handle other stream */ | |
3061 | continue; | |
3062 | } | |
3063 | ||
56047f5a | 3064 | lttng::urcu::read_lock_guard read_lock; |
d8ef542d MD |
3065 | { |
3066 | uint64_t tmp_id = (uint64_t) pollfd; | |
3067 | ||
3068 | lttng_ht_lookup(channel_ht, &tmp_id, &iter); | |
3069 | } | |
00d7d903 | 3070 | node = lttng_ht_iter_get_node<lttng_ht_node_u64>(&iter); |
a0377dfe | 3071 | LTTNG_ASSERT(node); |
d8ef542d | 3072 | |
28ab034a | 3073 | chan = caa_container_of(node, struct lttng_consumer_channel, wait_fd_node); |
d8ef542d MD |
3074 | |
3075 | /* Check for error event */ | |
3076 | if (revents & (LPOLLERR | LPOLLHUP)) { | |
3077 | DBG("Channel fd %d is hup|err.", pollfd); | |
3078 | ||
3079 | lttng_poll_del(&events, chan->wait_fd); | |
3080 | ret = lttng_ht_del(channel_ht, &iter); | |
a0377dfe | 3081 | LTTNG_ASSERT(ret == 0); |
b4a650f3 DG |
3082 | |
3083 | /* | |
3084 | * This will close the wait fd for each stream associated to | |
3085 | * this channel AND monitored by the data/metadata thread thus | |
3086 | * will be clean by the right thread. | |
3087 | */ | |
d8ef542d | 3088 | consumer_close_channel_streams(chan); |
f2ad556d MD |
3089 | |
3090 | /* Release our own refcount */ | |
28ab034a JG |
3091 | if (!uatomic_sub_return(&chan->refcount, 1) && |
3092 | !uatomic_read(&chan->nb_init_stream_left)) { | |
f2ad556d MD |
3093 | consumer_del_channel(chan); |
3094 | } | |
03e43155 MD |
3095 | } else { |
3096 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
03e43155 | 3097 | goto end; |
d8ef542d MD |
3098 | } |
3099 | ||
3100 | /* Release RCU lock for the channel looked up */ | |
d8ef542d MD |
3101 | } |
3102 | } | |
3103 | ||
1fc79fb4 MD |
3104 | /* All is OK */ |
3105 | err = 0; | |
d8ef542d MD |
3106 | end: |
3107 | lttng_poll_clean(&events); | |
3108 | end_poll: | |
3109 | destroy_channel_ht(channel_ht); | |
3110 | end_ht: | |
2d57de81 | 3111 | error_testpoint: |
d8ef542d | 3112 | DBG("Channel poll thread exiting"); |
1fc79fb4 MD |
3113 | if (err) { |
3114 | health_error(); | |
3115 | ERR("Health error occurred in %s", __func__); | |
3116 | } | |
3117 | health_unregister(health_consumerd); | |
d8ef542d | 3118 | rcu_unregister_thread(); |
cd9adb8b | 3119 | return nullptr; |
d8ef542d MD |
3120 | } |
3121 | ||
331744e3 | 3122 | static int set_metadata_socket(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
3123 | struct pollfd *sockpoll, |
3124 | int client_socket) | |
331744e3 JD |
3125 | { |
3126 | int ret; | |
3127 | ||
a0377dfe FD |
3128 | LTTNG_ASSERT(ctx); |
3129 | LTTNG_ASSERT(sockpoll); | |
331744e3 | 3130 | |
84382d49 MD |
3131 | ret = lttng_consumer_poll_socket(sockpoll); |
3132 | if (ret) { | |
331744e3 JD |
3133 | goto error; |
3134 | } | |
3135 | DBG("Metadata connection on client_socket"); | |
3136 | ||
3137 | /* Blocking call, waiting for transmission */ | |
3138 | ctx->consumer_metadata_socket = lttcomm_accept_unix_sock(client_socket); | |
3139 | if (ctx->consumer_metadata_socket < 0) { | |
3140 | WARN("On accept metadata"); | |
3141 | ret = -1; | |
3142 | goto error; | |
3143 | } | |
3144 | ret = 0; | |
3145 | ||
3146 | error: | |
3147 | return ret; | |
3148 | } | |
3149 | ||
3bd1e081 MD |
3150 | /* |
3151 | * This thread listens on the consumerd socket and receives the file | |
3152 | * descriptors from the session daemon. | |
3153 | */ | |
7d980def | 3154 | void *consumer_thread_sessiond_poll(void *data) |
3bd1e081 | 3155 | { |
1fc79fb4 | 3156 | int sock = -1, client_socket, ret, err = -1; |
3bd1e081 MD |
3157 | /* |
3158 | * structure to poll for incoming data on communication socket avoids | |
3159 | * making blocking sockets. | |
3160 | */ | |
3161 | struct pollfd consumer_sockpoll[2]; | |
97535efa | 3162 | struct lttng_consumer_local_data *ctx = (lttng_consumer_local_data *) data; |
3bd1e081 | 3163 | |
e7b994a3 DG |
3164 | rcu_register_thread(); |
3165 | ||
1fc79fb4 MD |
3166 | health_register(health_consumerd, HEALTH_CONSUMERD_TYPE_SESSIOND); |
3167 | ||
2d57de81 MD |
3168 | if (testpoint(consumerd_thread_sessiond)) { |
3169 | goto error_testpoint; | |
3170 | } | |
3171 | ||
9ce5646a MD |
3172 | health_code_update(); |
3173 | ||
3bd1e081 MD |
3174 | DBG("Creating command socket %s", ctx->consumer_command_sock_path); |
3175 | unlink(ctx->consumer_command_sock_path); | |
3176 | client_socket = lttcomm_create_unix_sock(ctx->consumer_command_sock_path); | |
3177 | if (client_socket < 0) { | |
3178 | ERR("Cannot create command socket"); | |
3179 | goto end; | |
3180 | } | |
3181 | ||
3182 | ret = lttcomm_listen_unix_sock(client_socket); | |
3183 | if (ret < 0) { | |
3184 | goto end; | |
3185 | } | |
3186 | ||
32258573 | 3187 | DBG("Sending ready command to lttng-sessiond"); |
f73fabfd | 3188 | ret = lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_COMMAND_SOCK_READY); |
3bd1e081 MD |
3189 | /* return < 0 on error, but == 0 is not fatal */ |
3190 | if (ret < 0) { | |
32258573 | 3191 | ERR("Error sending ready command to lttng-sessiond"); |
3bd1e081 MD |
3192 | goto end; |
3193 | } | |
3194 | ||
3bd1e081 MD |
3195 | /* prepare the FDs to poll : to client socket and the should_quit pipe */ |
3196 | consumer_sockpoll[0].fd = ctx->consumer_should_quit[0]; | |
3197 | consumer_sockpoll[0].events = POLLIN | POLLPRI; | |
3198 | consumer_sockpoll[1].fd = client_socket; | |
3199 | consumer_sockpoll[1].events = POLLIN | POLLPRI; | |
3200 | ||
84382d49 MD |
3201 | ret = lttng_consumer_poll_socket(consumer_sockpoll); |
3202 | if (ret) { | |
3203 | if (ret > 0) { | |
3204 | /* should exit */ | |
3205 | err = 0; | |
3206 | } | |
3bd1e081 MD |
3207 | goto end; |
3208 | } | |
3209 | DBG("Connection on client_socket"); | |
3210 | ||
3211 | /* Blocking call, waiting for transmission */ | |
3212 | sock = lttcomm_accept_unix_sock(client_socket); | |
534d2592 | 3213 | if (sock < 0) { |
3bd1e081 MD |
3214 | WARN("On accept"); |
3215 | goto end; | |
3216 | } | |
3bd1e081 | 3217 | |
331744e3 JD |
3218 | /* |
3219 | * Setup metadata socket which is the second socket connection on the | |
3220 | * command unix socket. | |
3221 | */ | |
3222 | ret = set_metadata_socket(ctx, consumer_sockpoll, client_socket); | |
84382d49 MD |
3223 | if (ret) { |
3224 | if (ret > 0) { | |
3225 | /* should exit */ | |
3226 | err = 0; | |
3227 | } | |
331744e3 JD |
3228 | goto end; |
3229 | } | |
3230 | ||
d96f09c6 DG |
3231 | /* This socket is not useful anymore. */ |
3232 | ret = close(client_socket); | |
3233 | if (ret < 0) { | |
3234 | PERROR("close client_socket"); | |
3235 | } | |
3236 | client_socket = -1; | |
3237 | ||
3bd1e081 MD |
3238 | /* update the polling structure to poll on the established socket */ |
3239 | consumer_sockpoll[1].fd = sock; | |
3240 | consumer_sockpoll[1].events = POLLIN | POLLPRI; | |
3241 | ||
cd9adb8b | 3242 | while (true) { |
9ce5646a MD |
3243 | health_code_update(); |
3244 | ||
3245 | health_poll_entry(); | |
3246 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
3247 | health_poll_exit(); | |
84382d49 MD |
3248 | if (ret) { |
3249 | if (ret > 0) { | |
3250 | /* should exit */ | |
3251 | err = 0; | |
3252 | } | |
3bd1e081 MD |
3253 | goto end; |
3254 | } | |
3255 | DBG("Incoming command on sock"); | |
3256 | ret = lttng_consumer_recv_cmd(ctx, sock, consumer_sockpoll); | |
4cbc1a04 DG |
3257 | if (ret <= 0) { |
3258 | /* | |
3259 | * This could simply be a session daemon quitting. Don't output | |
3260 | * ERR() here. | |
3261 | */ | |
3262 | DBG("Communication interrupted on command socket"); | |
41ba6035 | 3263 | err = 0; |
3bd1e081 MD |
3264 | goto end; |
3265 | } | |
10211f5c | 3266 | if (CMM_LOAD_SHARED(consumer_quit)) { |
3bd1e081 | 3267 | DBG("consumer_thread_receive_fds received quit from signal"); |
28ab034a | 3268 | err = 0; /* All is OK */ |
3bd1e081 MD |
3269 | goto end; |
3270 | } | |
a1ed855a | 3271 | DBG("Received command on sock"); |
3bd1e081 | 3272 | } |
1fc79fb4 MD |
3273 | /* All is OK */ |
3274 | err = 0; | |
3275 | ||
3bd1e081 | 3276 | end: |
ffe60014 | 3277 | DBG("Consumer thread sessiond poll exiting"); |
3bd1e081 | 3278 | |
d88aee68 DG |
3279 | /* |
3280 | * Close metadata streams since the producer is the session daemon which | |
3281 | * just died. | |
3282 | * | |
3283 | * NOTE: for now, this only applies to the UST tracer. | |
3284 | */ | |
6d574024 | 3285 | lttng_consumer_close_all_metadata(); |
d88aee68 | 3286 | |
3bd1e081 MD |
3287 | /* |
3288 | * when all fds have hung up, the polling thread | |
3289 | * can exit cleanly | |
3290 | */ | |
10211f5c | 3291 | CMM_STORE_SHARED(consumer_quit, 1); |
3bd1e081 | 3292 | |
04fdd819 | 3293 | /* |
c869f647 | 3294 | * Notify the data poll thread to poll back again and test the |
8994307f | 3295 | * consumer_quit state that we just set so to quit gracefully. |
04fdd819 | 3296 | */ |
acdb9057 | 3297 | notify_thread_lttng_pipe(ctx->consumer_data_pipe); |
c869f647 | 3298 | |
cd9adb8b | 3299 | notify_channel_pipe(ctx, nullptr, -1, CONSUMER_CHANNEL_QUIT); |
d8ef542d | 3300 | |
5c635c72 MD |
3301 | notify_health_quit_pipe(health_quit_pipe); |
3302 | ||
d96f09c6 DG |
3303 | /* Cleaning up possibly open sockets. */ |
3304 | if (sock >= 0) { | |
3305 | ret = close(sock); | |
3306 | if (ret < 0) { | |
3307 | PERROR("close sock sessiond poll"); | |
3308 | } | |
3309 | } | |
3310 | if (client_socket >= 0) { | |
38476d24 | 3311 | ret = close(client_socket); |
d96f09c6 DG |
3312 | if (ret < 0) { |
3313 | PERROR("close client_socket sessiond poll"); | |
3314 | } | |
3315 | } | |
3316 | ||
2d57de81 | 3317 | error_testpoint: |
1fc79fb4 MD |
3318 | if (err) { |
3319 | health_error(); | |
3320 | ERR("Health error occurred in %s", __func__); | |
3321 | } | |
3322 | health_unregister(health_consumerd); | |
3323 | ||
e7b994a3 | 3324 | rcu_unregister_thread(); |
cd9adb8b | 3325 | return nullptr; |
3bd1e081 | 3326 | } |
d41f73b7 | 3327 | |
503fefca | 3328 | static int post_consume(struct lttng_consumer_stream *stream, |
28ab034a JG |
3329 | const struct stream_subbuffer *subbuffer, |
3330 | struct lttng_consumer_local_data *ctx) | |
f96af312 | 3331 | { |
503fefca | 3332 | size_t i; |
f96af312 | 3333 | int ret = 0; |
28ab034a JG |
3334 | const size_t count = |
3335 | lttng_dynamic_array_get_count(&stream->read_subbuffer_ops.post_consume_cbs); | |
f96af312 | 3336 | |
503fefca JG |
3337 | for (i = 0; i < count; i++) { |
3338 | const post_consume_cb op = *(post_consume_cb *) lttng_dynamic_array_get_element( | |
28ab034a | 3339 | &stream->read_subbuffer_ops.post_consume_cbs, i); |
503fefca JG |
3340 | |
3341 | ret = op(stream, subbuffer, ctx); | |
3342 | if (ret) { | |
3343 | goto end; | |
f96af312 | 3344 | } |
f96af312 | 3345 | } |
f96af312 JG |
3346 | end: |
3347 | return ret; | |
3348 | } | |
3349 | ||
4078b776 | 3350 | ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream, |
28ab034a JG |
3351 | struct lttng_consumer_local_data *ctx, |
3352 | bool locked_by_caller) | |
d41f73b7 | 3353 | { |
12bddd1d | 3354 | ssize_t ret, written_bytes = 0; |
23d56598 | 3355 | int rotation_ret; |
6f9449c2 | 3356 | struct stream_subbuffer subbuffer = {}; |
b6797c8e | 3357 | enum get_next_subbuffer_status get_next_status; |
74251bb8 | 3358 | |
6f9449c2 JG |
3359 | if (!locked_by_caller) { |
3360 | stream->read_subbuffer_ops.lock(stream); | |
947bd097 JR |
3361 | } else { |
3362 | stream->read_subbuffer_ops.assert_locked(stream); | |
6f9449c2 JG |
3363 | } |
3364 | ||
3365 | if (stream->read_subbuffer_ops.on_wake_up) { | |
3366 | ret = stream->read_subbuffer_ops.on_wake_up(stream); | |
3367 | if (ret) { | |
3368 | goto end; | |
3369 | } | |
94d49140 | 3370 | } |
74251bb8 | 3371 | |
23d56598 JG |
3372 | /* |
3373 | * If the stream was flagged to be ready for rotation before we extract | |
3374 | * the next packet, rotate it now. | |
3375 | */ | |
3376 | if (stream->rotate_ready) { | |
3377 | DBG("Rotate stream before consuming data"); | |
f46376a1 | 3378 | ret = lttng_consumer_rotate_stream(stream); |
23d56598 JG |
3379 | if (ret < 0) { |
3380 | ERR("Stream rotation error before consuming data"); | |
3381 | goto end; | |
3382 | } | |
3383 | } | |
3384 | ||
28ab034a | 3385 | get_next_status = stream->read_subbuffer_ops.get_next_subbuffer(stream, &subbuffer); |
b6797c8e JG |
3386 | switch (get_next_status) { |
3387 | case GET_NEXT_SUBBUFFER_STATUS_OK: | |
3388 | break; | |
3389 | case GET_NEXT_SUBBUFFER_STATUS_NO_DATA: | |
3390 | /* Not an error. */ | |
3391 | ret = 0; | |
3392 | goto sleep_stream; | |
3393 | case GET_NEXT_SUBBUFFER_STATUS_ERROR: | |
3394 | ret = -1; | |
6f9449c2 | 3395 | goto end; |
b6797c8e JG |
3396 | default: |
3397 | abort(); | |
d41f73b7 | 3398 | } |
74251bb8 | 3399 | |
28ab034a | 3400 | ret = stream->read_subbuffer_ops.pre_consume_subbuffer(stream, &subbuffer); |
6f9449c2 JG |
3401 | if (ret) { |
3402 | goto error_put_subbuf; | |
3403 | } | |
3404 | ||
28ab034a | 3405 | written_bytes = stream->read_subbuffer_ops.consume_subbuffer(ctx, stream, &subbuffer); |
514775d9 FD |
3406 | if (written_bytes <= 0) { |
3407 | ERR("Error consuming subbuffer: (%zd)", written_bytes); | |
3408 | ret = (int) written_bytes; | |
3409 | goto error_put_subbuf; | |
6f9449c2 JG |
3410 | } |
3411 | ||
3412 | ret = stream->read_subbuffer_ops.put_next_subbuffer(stream, &subbuffer); | |
3413 | if (ret) { | |
23d56598 JG |
3414 | goto end; |
3415 | } | |
3416 | ||
503fefca JG |
3417 | ret = post_consume(stream, &subbuffer, ctx); |
3418 | if (ret) { | |
3419 | goto end; | |
6f9449c2 JG |
3420 | } |
3421 | ||
23d56598 JG |
3422 | /* |
3423 | * After extracting the packet, we check if the stream is now ready to | |
3424 | * be rotated and perform the action immediately. | |
3425 | * | |
3426 | * Don't overwrite `ret` as callers expect the number of bytes | |
3427 | * consumed to be returned on success. | |
3428 | */ | |
3429 | rotation_ret = lttng_consumer_stream_is_rotate_ready(stream); | |
3430 | if (rotation_ret == 1) { | |
f46376a1 | 3431 | rotation_ret = lttng_consumer_rotate_stream(stream); |
23d56598 JG |
3432 | if (rotation_ret < 0) { |
3433 | ret = rotation_ret; | |
3434 | ERR("Stream rotation error after consuming data"); | |
3435 | goto end; | |
3436 | } | |
503fefca | 3437 | |
23d56598 JG |
3438 | } else if (rotation_ret < 0) { |
3439 | ret = rotation_ret; | |
3440 | ERR("Failed to check if stream was ready to rotate after consuming data"); | |
3441 | goto end; | |
3442 | } | |
3443 | ||
82e72193 | 3444 | sleep_stream: |
6f9449c2 JG |
3445 | if (stream->read_subbuffer_ops.on_sleep) { |
3446 | stream->read_subbuffer_ops.on_sleep(stream, ctx); | |
3447 | } | |
3448 | ||
3449 | ret = written_bytes; | |
23d56598 | 3450 | end: |
6f9449c2 JG |
3451 | if (!locked_by_caller) { |
3452 | stream->read_subbuffer_ops.unlock(stream); | |
94d49140 | 3453 | } |
6f9449c2 | 3454 | |
74251bb8 | 3455 | return ret; |
6f9449c2 JG |
3456 | error_put_subbuf: |
3457 | (void) stream->read_subbuffer_ops.put_next_subbuffer(stream, &subbuffer); | |
3458 | goto end; | |
d41f73b7 MD |
3459 | } |
3460 | ||
3461 | int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
3462 | { | |
fa29bfbf | 3463 | switch (the_consumer_data.type) { |
d41f73b7 MD |
3464 | case LTTNG_CONSUMER_KERNEL: |
3465 | return lttng_kconsumer_on_recv_stream(stream); | |
7753dea8 MD |
3466 | case LTTNG_CONSUMER32_UST: |
3467 | case LTTNG_CONSUMER64_UST: | |
d41f73b7 MD |
3468 | return lttng_ustconsumer_on_recv_stream(stream); |
3469 | default: | |
3470 | ERR("Unknown consumer_data type"); | |
a0377dfe | 3471 | abort(); |
d41f73b7 MD |
3472 | return -ENOSYS; |
3473 | } | |
3474 | } | |
e4421fec DG |
3475 | |
3476 | /* | |
3477 | * Allocate and set consumer data hash tables. | |
3478 | */ | |
cd9adb8b | 3479 | int lttng_consumer_init() |
e4421fec | 3480 | { |
fa29bfbf SM |
3481 | the_consumer_data.channel_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3482 | if (!the_consumer_data.channel_ht) { | |
282dadbc MD |
3483 | goto error; |
3484 | } | |
3485 | ||
28ab034a | 3486 | the_consumer_data.channels_by_session_id_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
fa29bfbf | 3487 | if (!the_consumer_data.channels_by_session_id_ht) { |
5c3892a6 JG |
3488 | goto error; |
3489 | } | |
3490 | ||
fa29bfbf SM |
3491 | the_consumer_data.relayd_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3492 | if (!the_consumer_data.relayd_ht) { | |
282dadbc MD |
3493 | goto error; |
3494 | } | |
3495 | ||
fa29bfbf SM |
3496 | the_consumer_data.stream_list_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
3497 | if (!the_consumer_data.stream_list_ht) { | |
282dadbc MD |
3498 | goto error; |
3499 | } | |
3500 | ||
28ab034a | 3501 | the_consumer_data.stream_per_chan_id_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); |
fa29bfbf | 3502 | if (!the_consumer_data.stream_per_chan_id_ht) { |
282dadbc MD |
3503 | goto error; |
3504 | } | |
3505 | ||
3506 | data_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3507 | if (!data_ht) { | |
3508 | goto error; | |
3509 | } | |
3510 | ||
3511 | metadata_ht = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
3512 | if (!metadata_ht) { | |
3513 | goto error; | |
3514 | } | |
3515 | ||
fa29bfbf SM |
3516 | the_consumer_data.chunk_registry = lttng_trace_chunk_registry_create(); |
3517 | if (!the_consumer_data.chunk_registry) { | |
28cc88f3 JG |
3518 | goto error; |
3519 | } | |
3520 | ||
282dadbc MD |
3521 | return 0; |
3522 | ||
3523 | error: | |
3524 | return -1; | |
e4421fec | 3525 | } |
7735ef9e DG |
3526 | |
3527 | /* | |
3528 | * Process the ADD_RELAYD command receive by a consumer. | |
3529 | * | |
3530 | * This will create a relayd socket pair and add it to the relayd hash table. | |
3531 | * The caller MUST acquire a RCU read side lock before calling it. | |
3532 | */ | |
4222116f | 3533 | void consumer_add_relayd_socket(uint64_t net_seq_idx, |
28ab034a JG |
3534 | int sock_type, |
3535 | struct lttng_consumer_local_data *ctx, | |
3536 | int sock, | |
3537 | struct pollfd *consumer_sockpoll, | |
3538 | uint64_t sessiond_id, | |
3539 | uint64_t relayd_session_id, | |
3540 | uint32_t relayd_version_major, | |
3541 | uint32_t relayd_version_minor, | |
3542 | enum lttcomm_sock_proto relayd_socket_protocol) | |
7735ef9e | 3543 | { |
cd2b09ed | 3544 | int fd = -1, ret = -1, relayd_created = 0; |
0c759fc9 | 3545 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
cd9adb8b | 3546 | struct consumer_relayd_sock_pair *relayd = nullptr; |
7735ef9e | 3547 | |
a0377dfe | 3548 | LTTNG_ASSERT(ctx); |
4222116f | 3549 | LTTNG_ASSERT(sock >= 0); |
48b7cdc2 | 3550 | ASSERT_RCU_READ_LOCKED(); |
6151a90f | 3551 | |
da009f2c | 3552 | DBG("Consumer adding relayd socket (idx: %" PRIu64 ")", net_seq_idx); |
7735ef9e DG |
3553 | |
3554 | /* Get relayd reference if exists. */ | |
3555 | relayd = consumer_find_relayd(net_seq_idx); | |
cd9adb8b | 3556 | if (relayd == nullptr) { |
a0377dfe | 3557 | LTTNG_ASSERT(sock_type == LTTNG_STREAM_CONTROL); |
7735ef9e DG |
3558 | /* Not found. Allocate one. */ |
3559 | relayd = consumer_allocate_relayd_sock_pair(net_seq_idx); | |
cd9adb8b | 3560 | if (relayd == nullptr) { |
618a6a28 MD |
3561 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; |
3562 | goto error; | |
0d08d75e | 3563 | } else { |
30319bcb | 3564 | relayd->sessiond_session_id = sessiond_id; |
0d08d75e | 3565 | relayd_created = 1; |
7735ef9e | 3566 | } |
0d08d75e DG |
3567 | |
3568 | /* | |
3569 | * This code path MUST continue to the consumer send status message to | |
3570 | * we can notify the session daemon and continue our work without | |
3571 | * killing everything. | |
3572 | */ | |
da009f2c MD |
3573 | } else { |
3574 | /* | |
3575 | * relayd key should never be found for control socket. | |
3576 | */ | |
a0377dfe | 3577 | LTTNG_ASSERT(sock_type != LTTNG_STREAM_CONTROL); |
0d08d75e DG |
3578 | } |
3579 | ||
3580 | /* First send a status message before receiving the fds. */ | |
0c759fc9 | 3581 | ret = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
618a6a28 | 3582 | if (ret < 0) { |
0d08d75e | 3583 | /* Somehow, the session daemon is not responding anymore. */ |
618a6a28 MD |
3584 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); |
3585 | goto error_nosignal; | |
7735ef9e DG |
3586 | } |
3587 | ||
3588 | /* Poll on consumer socket. */ | |
84382d49 MD |
3589 | ret = lttng_consumer_poll_socket(consumer_sockpoll); |
3590 | if (ret) { | |
3591 | /* Needing to exit in the middle of a command: error. */ | |
0d08d75e | 3592 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_POLL_ERROR); |
618a6a28 | 3593 | goto error_nosignal; |
7735ef9e DG |
3594 | } |
3595 | ||
3596 | /* Get relayd socket from session daemon */ | |
3597 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); | |
3598 | if (ret != sizeof(fd)) { | |
28ab034a | 3599 | fd = -1; /* Just in case it gets set with an invalid value. */ |
0d08d75e DG |
3600 | |
3601 | /* | |
3602 | * Failing to receive FDs might indicate a major problem such as | |
3603 | * reaching a fd limit during the receive where the kernel returns a | |
3604 | * MSG_CTRUNC and fails to cleanup the fd in the queue. Any case, we | |
3605 | * don't take any chances and stop everything. | |
3606 | * | |
3607 | * XXX: Feature request #558 will fix that and avoid this possible | |
3608 | * issue when reaching the fd limit. | |
3609 | */ | |
3610 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); | |
618a6a28 | 3611 | ret_code = LTTCOMM_CONSUMERD_ERROR_RECV_FD; |
f50f23d9 DG |
3612 | goto error; |
3613 | } | |
3614 | ||
7735ef9e DG |
3615 | /* Copy socket information and received FD */ |
3616 | switch (sock_type) { | |
3617 | case LTTNG_STREAM_CONTROL: | |
3618 | /* Copy received lttcomm socket */ | |
4222116f | 3619 | ret = lttcomm_populate_sock_from_open_socket( |
28ab034a | 3620 | &relayd->control_sock.sock, fd, relayd_socket_protocol); |
7735ef9e | 3621 | |
6151a90f | 3622 | /* Assign version values. */ |
4222116f JR |
3623 | relayd->control_sock.major = relayd_version_major; |
3624 | relayd->control_sock.minor = relayd_version_minor; | |
c5b6f4f0 | 3625 | |
d3e2ba59 | 3626 | relayd->relayd_session_id = relayd_session_id; |
c5b6f4f0 | 3627 | |
7735ef9e DG |
3628 | break; |
3629 | case LTTNG_STREAM_DATA: | |
3630 | /* Copy received lttcomm socket */ | |
4222116f | 3631 | ret = lttcomm_populate_sock_from_open_socket( |
28ab034a | 3632 | &relayd->data_sock.sock, fd, relayd_socket_protocol); |
6151a90f | 3633 | /* Assign version values. */ |
4222116f JR |
3634 | relayd->data_sock.major = relayd_version_major; |
3635 | relayd->data_sock.minor = relayd_version_minor; | |
7735ef9e DG |
3636 | break; |
3637 | default: | |
3638 | ERR("Unknown relayd socket type (%d)", sock_type); | |
618a6a28 | 3639 | ret_code = LTTCOMM_CONSUMERD_FATAL; |
7735ef9e DG |
3640 | goto error; |
3641 | } | |
3642 | ||
4222116f JR |
3643 | if (ret < 0) { |
3644 | ret_code = LTTCOMM_CONSUMERD_FATAL; | |
3645 | goto error; | |
3646 | } | |
3647 | ||
d88aee68 | 3648 | DBG("Consumer %s socket created successfully with net idx %" PRIu64 " (fd: %d)", |
28ab034a JG |
3649 | sock_type == LTTNG_STREAM_CONTROL ? "control" : "data", |
3650 | relayd->net_seq_idx, | |
3651 | fd); | |
39d9954c FD |
3652 | /* |
3653 | * We gave the ownership of the fd to the relayd structure. Set the | |
3654 | * fd to -1 so we don't call close() on it in the error path below. | |
3655 | */ | |
3656 | fd = -1; | |
7735ef9e | 3657 | |
618a6a28 MD |
3658 | /* We successfully added the socket. Send status back. */ |
3659 | ret = consumer_send_status_msg(sock, ret_code); | |
3660 | if (ret < 0) { | |
3661 | /* Somehow, the session daemon is not responding anymore. */ | |
3662 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); | |
3663 | goto error_nosignal; | |
3664 | } | |
3665 | ||
7735ef9e DG |
3666 | /* |
3667 | * Add relayd socket pair to consumer data hashtable. If object already | |
3668 | * exists or on error, the function gracefully returns. | |
3669 | */ | |
9276e5c8 | 3670 | relayd->ctx = ctx; |
d09e1200 | 3671 | add_relayd(relayd); |
7735ef9e DG |
3672 | |
3673 | /* All good! */ | |
2527bf85 | 3674 | return; |
7735ef9e DG |
3675 | |
3676 | error: | |
618a6a28 MD |
3677 | if (consumer_send_status_msg(sock, ret_code) < 0) { |
3678 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_FATAL); | |
3679 | } | |
3680 | ||
3681 | error_nosignal: | |
4028eeb9 DG |
3682 | /* Close received socket if valid. */ |
3683 | if (fd >= 0) { | |
3684 | if (close(fd)) { | |
3685 | PERROR("close received socket"); | |
3686 | } | |
3687 | } | |
cd2b09ed DG |
3688 | |
3689 | if (relayd_created) { | |
cd2b09ed DG |
3690 | free(relayd); |
3691 | } | |
7735ef9e | 3692 | } |
ca22feea | 3693 | |
f7079f67 DG |
3694 | /* |
3695 | * Search for a relayd associated to the session id and return the reference. | |
3696 | * | |
3697 | * A rcu read side lock MUST be acquire before calling this function and locked | |
3698 | * until the relayd object is no longer necessary. | |
3699 | */ | |
3700 | static struct consumer_relayd_sock_pair *find_relayd_by_session_id(uint64_t id) | |
3701 | { | |
3702 | struct lttng_ht_iter iter; | |
cd9adb8b | 3703 | struct consumer_relayd_sock_pair *relayd = nullptr; |
f7079f67 | 3704 | |
48b7cdc2 FD |
3705 | ASSERT_RCU_READ_LOCKED(); |
3706 | ||
f7079f67 | 3707 | /* Iterate over all relayd since they are indexed by net_seq_idx. */ |
28ab034a | 3708 | cds_lfht_for_each_entry (the_consumer_data.relayd_ht->ht, &iter.iter, relayd, node.node) { |
18261bd1 DG |
3709 | /* |
3710 | * Check by sessiond id which is unique here where the relayd session | |
3711 | * id might not be when having multiple relayd. | |
3712 | */ | |
3713 | if (relayd->sessiond_session_id == id) { | |
f7079f67 | 3714 | /* Found the relayd. There can be only one per id. */ |
18261bd1 | 3715 | goto found; |
f7079f67 DG |
3716 | } |
3717 | } | |
3718 | ||
cd9adb8b | 3719 | return nullptr; |
18261bd1 DG |
3720 | |
3721 | found: | |
f7079f67 DG |
3722 | return relayd; |
3723 | } | |
3724 | ||
ca22feea DG |
3725 | /* |
3726 | * Check if for a given session id there is still data needed to be extract | |
3727 | * from the buffers. | |
3728 | * | |
6d805429 | 3729 | * Return 1 if data is pending or else 0 meaning ready to be read. |
ca22feea | 3730 | */ |
6d805429 | 3731 | int consumer_data_pending(uint64_t id) |
ca22feea DG |
3732 | { |
3733 | int ret; | |
3734 | struct lttng_ht_iter iter; | |
3735 | struct lttng_ht *ht; | |
3736 | struct lttng_consumer_stream *stream; | |
cd9adb8b | 3737 | struct consumer_relayd_sock_pair *relayd = nullptr; |
6d805429 | 3738 | int (*data_pending)(struct lttng_consumer_stream *); |
ca22feea | 3739 | |
6d805429 | 3740 | DBG("Consumer data pending command on session id %" PRIu64, id); |
ca22feea | 3741 | |
56047f5a | 3742 | lttng::urcu::read_lock_guard read_lock; |
fa29bfbf | 3743 | pthread_mutex_lock(&the_consumer_data.lock); |
ca22feea | 3744 | |
fa29bfbf | 3745 | switch (the_consumer_data.type) { |
ca22feea | 3746 | case LTTNG_CONSUMER_KERNEL: |
6d805429 | 3747 | data_pending = lttng_kconsumer_data_pending; |
ca22feea DG |
3748 | break; |
3749 | case LTTNG_CONSUMER32_UST: | |
3750 | case LTTNG_CONSUMER64_UST: | |
6d805429 | 3751 | data_pending = lttng_ustconsumer_data_pending; |
ca22feea DG |
3752 | break; |
3753 | default: | |
3754 | ERR("Unknown consumer data type"); | |
a0377dfe | 3755 | abort(); |
ca22feea DG |
3756 | } |
3757 | ||
3758 | /* Ease our life a bit */ | |
fa29bfbf | 3759 | ht = the_consumer_data.stream_list_ht; |
ca22feea | 3760 | |
c8f59ee5 | 3761 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
3762 | ht->hash_fct(&id, lttng_ht_seed), |
3763 | ht->match_fct, | |
3764 | &id, | |
3765 | &iter.iter, | |
3766 | stream, | |
3767 | node_session_id.node) | |
3768 | { | |
bb586a6e | 3769 | pthread_mutex_lock(&stream->lock); |
ca22feea | 3770 | |
4e9a4686 DG |
3771 | /* |
3772 | * A removed node from the hash table indicates that the stream has | |
3773 | * been deleted thus having a guarantee that the buffers are closed | |
3774 | * on the consumer side. However, data can still be transmitted | |
3775 | * over the network so don't skip the relayd check. | |
3776 | */ | |
3777 | ret = cds_lfht_is_node_deleted(&stream->node.node); | |
3778 | if (!ret) { | |
3779 | /* Check the stream if there is data in the buffers. */ | |
6d805429 DG |
3780 | ret = data_pending(stream); |
3781 | if (ret == 1) { | |
4e9a4686 | 3782 | pthread_mutex_unlock(&stream->lock); |
f7079f67 | 3783 | goto data_pending; |
4e9a4686 DG |
3784 | } |
3785 | } | |
3786 | ||
d9f0c7c7 JR |
3787 | pthread_mutex_unlock(&stream->lock); |
3788 | } | |
3789 | ||
3790 | relayd = find_relayd_by_session_id(id); | |
3791 | if (relayd) { | |
3792 | unsigned int is_data_inflight = 0; | |
3793 | ||
3794 | /* Send init command for data pending. */ | |
3795 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
28ab034a | 3796 | ret = relayd_begin_data_pending(&relayd->control_sock, relayd->relayd_session_id); |
d9f0c7c7 JR |
3797 | if (ret < 0) { |
3798 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
3799 | /* Communication error thus the relayd so no data pending. */ | |
3800 | goto data_not_pending; | |
3801 | } | |
3802 | ||
3803 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
28ab034a JG |
3804 | ht->hash_fct(&id, lttng_ht_seed), |
3805 | ht->match_fct, | |
3806 | &id, | |
3807 | &iter.iter, | |
3808 | stream, | |
3809 | node_session_id.node) | |
3810 | { | |
c8f59ee5 | 3811 | if (stream->metadata_flag) { |
ad7051c0 | 3812 | ret = relayd_quiescent_control(&relayd->control_sock, |
28ab034a | 3813 | stream->relayd_stream_id); |
c8f59ee5 | 3814 | } else { |
6d805429 | 3815 | ret = relayd_data_pending(&relayd->control_sock, |
28ab034a JG |
3816 | stream->relayd_stream_id, |
3817 | stream->next_net_seq_num - 1); | |
c8f59ee5 | 3818 | } |
d9f0c7c7 JR |
3819 | |
3820 | if (ret == 1) { | |
3821 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
3822 | goto data_pending; | |
3823 | } else if (ret < 0) { | |
28ab034a JG |
3824 | ERR("Relayd data pending failed. Cleaning up relayd %" PRIu64 ".", |
3825 | relayd->net_seq_idx); | |
9276e5c8 JR |
3826 | lttng_consumer_cleanup_relayd(relayd); |
3827 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); | |
9276e5c8 JR |
3828 | goto data_not_pending; |
3829 | } | |
c8f59ee5 | 3830 | } |
f7079f67 | 3831 | |
d9f0c7c7 | 3832 | /* Send end command for data pending. */ |
28ab034a JG |
3833 | ret = relayd_end_data_pending( |
3834 | &relayd->control_sock, relayd->relayd_session_id, &is_data_inflight); | |
f7079f67 | 3835 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
bdd88757 | 3836 | if (ret < 0) { |
28ab034a JG |
3837 | ERR("Relayd end data pending failed. Cleaning up relayd %" PRIu64 ".", |
3838 | relayd->net_seq_idx); | |
9276e5c8 | 3839 | lttng_consumer_cleanup_relayd(relayd); |
f7079f67 DG |
3840 | goto data_not_pending; |
3841 | } | |
bdd88757 DG |
3842 | if (is_data_inflight) { |
3843 | goto data_pending; | |
3844 | } | |
f7079f67 DG |
3845 | } |
3846 | ||
ca22feea | 3847 | /* |
f7079f67 DG |
3848 | * Finding _no_ node in the hash table and no inflight data means that the |
3849 | * stream(s) have been removed thus data is guaranteed to be available for | |
3850 | * analysis from the trace files. | |
ca22feea DG |
3851 | */ |
3852 | ||
f7079f67 | 3853 | data_not_pending: |
ca22feea | 3854 | /* Data is available to be read by a viewer. */ |
fa29bfbf | 3855 | pthread_mutex_unlock(&the_consumer_data.lock); |
6d805429 | 3856 | return 0; |
ca22feea | 3857 | |
f7079f67 | 3858 | data_pending: |
ca22feea | 3859 | /* Data is still being extracted from buffers. */ |
fa29bfbf | 3860 | pthread_mutex_unlock(&the_consumer_data.lock); |
6d805429 | 3861 | return 1; |
ca22feea | 3862 | } |
f50f23d9 DG |
3863 | |
3864 | /* | |
3865 | * Send a ret code status message to the sessiond daemon. | |
3866 | * | |
3867 | * Return the sendmsg() return value. | |
3868 | */ | |
3869 | int consumer_send_status_msg(int sock, int ret_code) | |
3870 | { | |
3871 | struct lttcomm_consumer_status_msg msg; | |
3872 | ||
53efb85a | 3873 | memset(&msg, 0, sizeof(msg)); |
97535efa | 3874 | msg.ret_code = (lttcomm_return_code) ret_code; |
f50f23d9 DG |
3875 | |
3876 | return lttcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
3877 | } | |
ffe60014 DG |
3878 | |
3879 | /* | |
3880 | * Send a channel status message to the sessiond daemon. | |
3881 | * | |
3882 | * Return the sendmsg() return value. | |
3883 | */ | |
28ab034a | 3884 | int consumer_send_status_channel(int sock, struct lttng_consumer_channel *channel) |
ffe60014 DG |
3885 | { |
3886 | struct lttcomm_consumer_status_channel msg; | |
3887 | ||
a0377dfe | 3888 | LTTNG_ASSERT(sock >= 0); |
ffe60014 | 3889 | |
53efb85a | 3890 | memset(&msg, 0, sizeof(msg)); |
ffe60014 | 3891 | if (!channel) { |
0c759fc9 | 3892 | msg.ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; |
ffe60014 | 3893 | } else { |
0c759fc9 | 3894 | msg.ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
ffe60014 DG |
3895 | msg.key = channel->key; |
3896 | msg.stream_count = channel->streams.count; | |
3897 | } | |
3898 | ||
3899 | return lttcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
3900 | } | |
5c786ded | 3901 | |
d07ceecd | 3902 | unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos, |
28ab034a JG |
3903 | unsigned long produced_pos, |
3904 | uint64_t nb_packets_per_stream, | |
3905 | uint64_t max_sb_size) | |
5c786ded | 3906 | { |
d07ceecd | 3907 | unsigned long start_pos; |
5c786ded | 3908 | |
d07ceecd | 3909 | if (!nb_packets_per_stream) { |
28ab034a | 3910 | return consumed_pos; /* Grab everything */ |
d07ceecd | 3911 | } |
1cbd136b | 3912 | start_pos = produced_pos - lttng_offset_align_floor(produced_pos, max_sb_size); |
d07ceecd MD |
3913 | start_pos -= max_sb_size * nb_packets_per_stream; |
3914 | if ((long) (start_pos - consumed_pos) < 0) { | |
28ab034a | 3915 | return consumed_pos; /* Grab everything */ |
d07ceecd MD |
3916 | } |
3917 | return start_pos; | |
5c786ded | 3918 | } |
a1ae2ea5 | 3919 | |
c1dcb8bb JG |
3920 | /* Stream lock must be held by the caller. */ |
3921 | static int sample_stream_positions(struct lttng_consumer_stream *stream, | |
28ab034a JG |
3922 | unsigned long *produced, |
3923 | unsigned long *consumed) | |
c1dcb8bb JG |
3924 | { |
3925 | int ret; | |
3926 | ||
3927 | ASSERT_LOCKED(stream->lock); | |
3928 | ||
3929 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
3930 | if (ret < 0) { | |
3931 | ERR("Failed to sample snapshot positions"); | |
3932 | goto end; | |
3933 | } | |
3934 | ||
3935 | ret = lttng_consumer_get_produced_snapshot(stream, produced); | |
3936 | if (ret < 0) { | |
3937 | ERR("Failed to sample produced position"); | |
3938 | goto end; | |
3939 | } | |
3940 | ||
3941 | ret = lttng_consumer_get_consumed_snapshot(stream, consumed); | |
3942 | if (ret < 0) { | |
3943 | ERR("Failed to sample consumed position"); | |
3944 | goto end; | |
3945 | } | |
3946 | ||
3947 | end: | |
3948 | return ret; | |
3949 | } | |
3950 | ||
b99a8d42 JD |
3951 | /* |
3952 | * Sample the rotate position for all the streams of a channel. If a stream | |
3953 | * is already at the rotate position (produced == consumed), we flag it as | |
3954 | * ready for rotation. The rotation of ready streams occurs after we have | |
3955 | * replied to the session daemon that we have finished sampling the positions. | |
92b7a7f8 | 3956 | * Must be called with RCU read-side lock held to ensure existence of channel. |
b99a8d42 JD |
3957 | * |
3958 | * Returns 0 on success, < 0 on error | |
3959 | */ | |
92b7a7f8 | 3960 | int lttng_consumer_rotate_channel(struct lttng_consumer_channel *channel, |
28ab034a JG |
3961 | uint64_t key, |
3962 | uint64_t relayd_id) | |
b99a8d42 JD |
3963 | { |
3964 | int ret; | |
b99a8d42 JD |
3965 | struct lttng_consumer_stream *stream; |
3966 | struct lttng_ht_iter iter; | |
fa29bfbf | 3967 | struct lttng_ht *ht = the_consumer_data.stream_per_chan_id_ht; |
c35f9726 JG |
3968 | struct lttng_dynamic_array stream_rotation_positions; |
3969 | uint64_t next_chunk_id, stream_count = 0; | |
3970 | enum lttng_trace_chunk_status chunk_status; | |
3971 | const bool is_local_trace = relayd_id == -1ULL; | |
cd9adb8b | 3972 | struct consumer_relayd_sock_pair *relayd = nullptr; |
c35f9726 | 3973 | bool rotating_to_new_chunk = true; |
b32703d6 JG |
3974 | /* Array of `struct lttng_consumer_stream *` */ |
3975 | struct lttng_dynamic_pointer_array streams_packet_to_open; | |
3976 | size_t stream_idx; | |
b99a8d42 | 3977 | |
48b7cdc2 FD |
3978 | ASSERT_RCU_READ_LOCKED(); |
3979 | ||
b99a8d42 JD |
3980 | DBG("Consumer sample rotate position for channel %" PRIu64, key); |
3981 | ||
cd9adb8b JG |
3982 | lttng_dynamic_array_init(&stream_rotation_positions, |
3983 | sizeof(struct relayd_stream_rotation_position), | |
3984 | nullptr); | |
3985 | lttng_dynamic_pointer_array_init(&streams_packet_to_open, nullptr); | |
c35f9726 | 3986 | |
56047f5a | 3987 | lttng::urcu::read_lock_guard read_lock; |
b99a8d42 | 3988 | |
b99a8d42 | 3989 | pthread_mutex_lock(&channel->lock); |
a0377dfe | 3990 | LTTNG_ASSERT(channel->trace_chunk); |
28ab034a | 3991 | chunk_status = lttng_trace_chunk_get_id(channel->trace_chunk, &next_chunk_id); |
c35f9726 JG |
3992 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
3993 | ret = -1; | |
3994 | goto end_unlock_channel; | |
3995 | } | |
b99a8d42 JD |
3996 | |
3997 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
28ab034a JG |
3998 | ht->hash_fct(&channel->key, lttng_ht_seed), |
3999 | ht->match_fct, | |
4000 | &channel->key, | |
4001 | &iter.iter, | |
4002 | stream, | |
4003 | node_channel_id.node) | |
4004 | { | |
a40a503f | 4005 | unsigned long produced_pos = 0, consumed_pos = 0; |
b99a8d42 JD |
4006 | |
4007 | health_code_update(); | |
4008 | ||
4009 | /* | |
4010 | * Lock stream because we are about to change its state. | |
4011 | */ | |
4012 | pthread_mutex_lock(&stream->lock); | |
4013 | ||
c35f9726 JG |
4014 | if (stream->trace_chunk == stream->chan->trace_chunk) { |
4015 | rotating_to_new_chunk = false; | |
4016 | } | |
4017 | ||
a40a503f | 4018 | /* |
c1dcb8bb | 4019 | * Do not flush a packet when rotating from a NULL trace |
a9dde553 | 4020 | * chunk. The stream has no means to output data, and the prior |
c1dcb8bb JG |
4021 | * rotation which rotated to NULL performed that side-effect |
4022 | * already. No new data can be produced when a stream has no | |
4023 | * associated trace chunk (e.g. a stop followed by a rotate). | |
a40a503f | 4024 | */ |
a9dde553 | 4025 | if (stream->trace_chunk) { |
c1dcb8bb JG |
4026 | bool flush_active; |
4027 | ||
4028 | if (stream->metadata_flag) { | |
4029 | /* | |
4030 | * Don't produce an empty metadata packet, | |
4031 | * simply close the current one. | |
4032 | * | |
4033 | * Metadata is regenerated on every trace chunk | |
4034 | * switch; there is no concern that no data was | |
4035 | * produced. | |
4036 | */ | |
4037 | flush_active = true; | |
4038 | } else { | |
4039 | /* | |
4040 | * Only flush an empty packet if the "packet | |
4041 | * open" could not be performed on transition | |
4042 | * to a new trace chunk and no packets were | |
4043 | * consumed within the chunk's lifetime. | |
4044 | */ | |
4045 | if (stream->opened_packet_in_current_trace_chunk) { | |
4046 | flush_active = true; | |
4047 | } else { | |
4048 | /* | |
4049 | * Stream could have been full at the | |
4050 | * time of rotation, but then have had | |
4051 | * no activity at all. | |
4052 | * | |
4053 | * It is important to flush a packet | |
4054 | * to prevent 0-length files from being | |
4055 | * produced as most viewers choke on | |
4056 | * them. | |
4057 | * | |
4058 | * Unfortunately viewers will not be | |
4059 | * able to know that tracing was active | |
4060 | * for this stream during this trace | |
4061 | * chunk's lifetime. | |
4062 | */ | |
28ab034a JG |
4063 | ret = sample_stream_positions( |
4064 | stream, &produced_pos, &consumed_pos); | |
c1dcb8bb JG |
4065 | if (ret) { |
4066 | goto end_unlock_stream; | |
4067 | } | |
4068 | ||
4069 | /* | |
4070 | * Don't flush an empty packet if data | |
4071 | * was produced; it will be consumed | |
4072 | * before the rotation completes. | |
4073 | */ | |
4074 | flush_active = produced_pos != consumed_pos; | |
4075 | if (!flush_active) { | |
c1dcb8bb JG |
4076 | const char *trace_chunk_name; |
4077 | uint64_t trace_chunk_id; | |
4078 | ||
4079 | chunk_status = lttng_trace_chunk_get_name( | |
28ab034a JG |
4080 | stream->trace_chunk, |
4081 | &trace_chunk_name, | |
cd9adb8b | 4082 | nullptr); |
c1dcb8bb JG |
4083 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_NONE) { |
4084 | trace_chunk_name = "none"; | |
4085 | } | |
4086 | ||
4087 | /* | |
4088 | * Consumer trace chunks are | |
4089 | * never anonymous. | |
4090 | */ | |
4091 | chunk_status = lttng_trace_chunk_get_id( | |
28ab034a | 4092 | stream->trace_chunk, &trace_chunk_id); |
a0377dfe | 4093 | LTTNG_ASSERT(chunk_status == |
28ab034a | 4094 | LTTNG_TRACE_CHUNK_STATUS_OK); |
c1dcb8bb JG |
4095 | |
4096 | DBG("Unable to open packet for stream during trace chunk's lifetime. " | |
28ab034a JG |
4097 | "Flushing an empty packet to prevent an empty file from being created: " |
4098 | "stream id = %" PRIu64 | |
4099 | ", trace chunk name = `%s`, trace chunk id = %" PRIu64, | |
4100 | stream->key, | |
4101 | trace_chunk_name, | |
4102 | trace_chunk_id); | |
c1dcb8bb JG |
4103 | } |
4104 | } | |
4105 | } | |
4106 | ||
a9dde553 | 4107 | /* |
c1dcb8bb JG |
4108 | * Close the current packet before sampling the |
4109 | * ring buffer positions. | |
a9dde553 | 4110 | */ |
c1dcb8bb | 4111 | ret = consumer_stream_flush_buffer(stream, flush_active); |
a9dde553 MD |
4112 | if (ret < 0) { |
4113 | ERR("Failed to flush stream %" PRIu64 " during channel rotation", | |
28ab034a | 4114 | stream->key); |
a9dde553 MD |
4115 | goto end_unlock_stream; |
4116 | } | |
b99a8d42 JD |
4117 | } |
4118 | ||
a40a503f MD |
4119 | ret = lttng_consumer_take_snapshot(stream); |
4120 | if (ret < 0 && ret != -ENODATA && ret != -EAGAIN) { | |
4121 | ERR("Failed to sample snapshot position during channel rotation"); | |
b99a8d42 JD |
4122 | goto end_unlock_stream; |
4123 | } | |
a40a503f | 4124 | if (!ret) { |
28ab034a | 4125 | ret = lttng_consumer_get_produced_snapshot(stream, &produced_pos); |
a40a503f MD |
4126 | if (ret < 0) { |
4127 | ERR("Failed to sample produced position during channel rotation"); | |
4128 | goto end_unlock_stream; | |
4129 | } | |
b99a8d42 | 4130 | |
28ab034a | 4131 | ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos); |
a40a503f MD |
4132 | if (ret < 0) { |
4133 | ERR("Failed to sample consumed position during channel rotation"); | |
4134 | goto end_unlock_stream; | |
4135 | } | |
4136 | } | |
4137 | /* | |
4138 | * Align produced position on the start-of-packet boundary of the first | |
4139 | * packet going into the next trace chunk. | |
4140 | */ | |
1cbd136b | 4141 | produced_pos = lttng_align_floor(produced_pos, stream->max_sb_size); |
a40a503f | 4142 | if (consumed_pos == produced_pos) { |
f8528c7a | 4143 | DBG("Set rotate ready for stream %" PRIu64 " produced = %lu consumed = %lu", |
28ab034a JG |
4144 | stream->key, |
4145 | produced_pos, | |
4146 | consumed_pos); | |
b99a8d42 | 4147 | stream->rotate_ready = true; |
f8528c7a MD |
4148 | } else { |
4149 | DBG("Different consumed and produced positions " | |
28ab034a JG |
4150 | "for stream %" PRIu64 " produced = %lu consumed = %lu", |
4151 | stream->key, | |
4152 | produced_pos, | |
4153 | consumed_pos); | |
b99a8d42 | 4154 | } |
633d0182 | 4155 | /* |
a40a503f MD |
4156 | * The rotation position is based on the packet_seq_num of the |
4157 | * packet following the last packet that was consumed for this | |
4158 | * stream, incremented by the offset between produced and | |
4159 | * consumed positions. This rotation position is a lower bound | |
4160 | * (inclusive) at which the next trace chunk starts. Since it | |
4161 | * is a lower bound, it is OK if the packet_seq_num does not | |
4162 | * correspond exactly to the same packet identified by the | |
4163 | * consumed_pos, which can happen in overwrite mode. | |
633d0182 | 4164 | */ |
a40a503f MD |
4165 | if (stream->sequence_number_unavailable) { |
4166 | /* | |
4167 | * Rotation should never be performed on a session which | |
4168 | * interacts with a pre-2.8 lttng-modules, which does | |
4169 | * not implement packet sequence number. | |
4170 | */ | |
4171 | ERR("Failure to rotate stream %" PRIu64 ": sequence number unavailable", | |
28ab034a | 4172 | stream->key); |
a40a503f | 4173 | ret = -1; |
b99a8d42 JD |
4174 | goto end_unlock_stream; |
4175 | } | |
a40a503f | 4176 | stream->rotate_position = stream->last_sequence_number + 1 + |
28ab034a | 4177 | ((produced_pos - consumed_pos) / stream->max_sb_size); |
f8528c7a | 4178 | DBG("Set rotation position for stream %" PRIu64 " at position %" PRIu64, |
28ab034a JG |
4179 | stream->key, |
4180 | stream->rotate_position); | |
b99a8d42 | 4181 | |
c35f9726 | 4182 | if (!is_local_trace) { |
633d0182 JG |
4183 | /* |
4184 | * The relay daemon control protocol expects a rotation | |
4185 | * position as "the sequence number of the first packet | |
a40a503f | 4186 | * _after_ the current trace chunk". |
633d0182 | 4187 | */ |
c35f9726 JG |
4188 | const struct relayd_stream_rotation_position position = { |
4189 | .stream_id = stream->relayd_stream_id, | |
a40a503f | 4190 | .rotate_at_seq_num = stream->rotate_position, |
c35f9726 JG |
4191 | }; |
4192 | ||
28ab034a JG |
4193 | ret = lttng_dynamic_array_add_element(&stream_rotation_positions, |
4194 | &position); | |
c35f9726 JG |
4195 | if (ret) { |
4196 | ERR("Failed to allocate stream rotation position"); | |
4197 | goto end_unlock_stream; | |
4198 | } | |
4199 | stream_count++; | |
4200 | } | |
f96af312 JG |
4201 | |
4202 | stream->opened_packet_in_current_trace_chunk = false; | |
4203 | ||
4204 | if (rotating_to_new_chunk && !stream->metadata_flag) { | |
4205 | /* | |
4206 | * Attempt to flush an empty packet as close to the | |
4207 | * rotation point as possible. In the event where a | |
4208 | * stream remains inactive after the rotation point, | |
4209 | * this ensures that the new trace chunk has a | |
4210 | * beginning timestamp set at the begining of the | |
4211 | * trace chunk instead of only creating an empty | |
4212 | * packet when the trace chunk is stopped. | |
4213 | * | |
4214 | * This indicates to the viewers that the stream | |
4215 | * was being recorded, but more importantly it | |
4216 | * allows viewers to determine a useable trace | |
4217 | * intersection. | |
4218 | * | |
4219 | * This presents a problem in the case where the | |
4220 | * ring-buffer is completely full. | |
4221 | * | |
4222 | * Consider the following scenario: | |
4223 | * - The consumption of data is slow (slow network, | |
4224 | * for instance), | |
4225 | * - The ring buffer is full, | |
4226 | * - A rotation is initiated, | |
4227 | * - The flush below does nothing (no space left to | |
4228 | * open a new packet), | |
4229 | * - The other streams rotate very soon, and new | |
4230 | * data is produced in the new chunk, | |
4231 | * - This stream completes its rotation long after the | |
4232 | * rotation was initiated | |
4233 | * - The session is stopped before any event can be | |
4234 | * produced in this stream's buffers. | |
4235 | * | |
4236 | * The resulting trace chunk will have a single packet | |
4237 | * temporaly at the end of the trace chunk for this | |
4238 | * stream making the stream intersection more narrow | |
4239 | * than it should be. | |
4240 | * | |
4241 | * To work-around this, an empty flush is performed | |
4242 | * after the first consumption of a packet during a | |
4243 | * rotation if open_packet fails. The idea is that | |
4244 | * consuming a packet frees enough space to switch | |
4245 | * packets in this scenario and allows the tracer to | |
4246 | * "stamp" the beginning of the new trace chunk at the | |
4247 | * earliest possible point. | |
b32703d6 JG |
4248 | * |
4249 | * The packet open is performed after the channel | |
4250 | * rotation to ensure that no attempt to open a packet | |
4251 | * is performed in a stream that has no active trace | |
4252 | * chunk. | |
f96af312 | 4253 | */ |
28ab034a JG |
4254 | ret = lttng_dynamic_pointer_array_add_pointer(&streams_packet_to_open, |
4255 | stream); | |
b32703d6 JG |
4256 | if (ret) { |
4257 | PERROR("Failed to add a stream pointer to array of streams in which to open a packet"); | |
f96af312 JG |
4258 | ret = -1; |
4259 | goto end_unlock_stream; | |
f96af312 JG |
4260 | } |
4261 | } | |
4262 | ||
b99a8d42 JD |
4263 | pthread_mutex_unlock(&stream->lock); |
4264 | } | |
cd9adb8b | 4265 | stream = nullptr; |
b99a8d42 | 4266 | |
b32703d6 JG |
4267 | if (!is_local_trace) { |
4268 | relayd = consumer_find_relayd(relayd_id); | |
4269 | if (!relayd) { | |
4270 | ERR("Failed to find relayd %" PRIu64, relayd_id); | |
4271 | ret = -1; | |
4272 | goto end_unlock_channel; | |
4273 | } | |
c35f9726 | 4274 | |
b32703d6 | 4275 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); |
28ab034a JG |
4276 | ret = relayd_rotate_streams(&relayd->control_sock, |
4277 | stream_count, | |
cd9adb8b | 4278 | rotating_to_new_chunk ? &next_chunk_id : nullptr, |
28ab034a JG |
4279 | (const struct relayd_stream_rotation_position *) |
4280 | stream_rotation_positions.buffer.data); | |
b32703d6 JG |
4281 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
4282 | if (ret < 0) { | |
4283 | ERR("Relayd rotate stream failed. Cleaning up relayd %" PRIu64, | |
28ab034a | 4284 | relayd->net_seq_idx); |
b32703d6 JG |
4285 | lttng_consumer_cleanup_relayd(relayd); |
4286 | goto end_unlock_channel; | |
4287 | } | |
c35f9726 JG |
4288 | } |
4289 | ||
b32703d6 | 4290 | for (stream_idx = 0; |
28ab034a JG |
4291 | stream_idx < lttng_dynamic_pointer_array_get_count(&streams_packet_to_open); |
4292 | stream_idx++) { | |
b32703d6 JG |
4293 | enum consumer_stream_open_packet_status status; |
4294 | ||
97535efa | 4295 | stream = (lttng_consumer_stream *) lttng_dynamic_pointer_array_get_pointer( |
28ab034a | 4296 | &streams_packet_to_open, stream_idx); |
b32703d6 JG |
4297 | |
4298 | pthread_mutex_lock(&stream->lock); | |
4299 | status = consumer_stream_open_packet(stream); | |
4300 | pthread_mutex_unlock(&stream->lock); | |
4301 | switch (status) { | |
4302 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_OPENED: | |
4303 | DBG("Opened a packet after a rotation: stream id = %" PRIu64 | |
4304 | ", channel name = %s, session id = %" PRIu64, | |
28ab034a JG |
4305 | stream->key, |
4306 | stream->chan->name, | |
4307 | stream->chan->session_id); | |
b32703d6 JG |
4308 | break; |
4309 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_NO_SPACE: | |
4310 | /* | |
4311 | * Can't open a packet as there is no space left | |
4312 | * in the buffer. A new packet will be opened | |
4313 | * once one has been consumed. | |
4314 | */ | |
4315 | DBG("No space left to open a packet after a rotation: stream id = %" PRIu64 | |
4316 | ", channel name = %s, session id = %" PRIu64, | |
28ab034a JG |
4317 | stream->key, |
4318 | stream->chan->name, | |
4319 | stream->chan->session_id); | |
b32703d6 JG |
4320 | break; |
4321 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR: | |
4322 | /* Logged by callee. */ | |
4323 | ret = -1; | |
7a86c13d | 4324 | goto end_unlock_channel; |
b32703d6 JG |
4325 | default: |
4326 | abort(); | |
4327 | } | |
c35f9726 JG |
4328 | } |
4329 | ||
b32703d6 | 4330 | pthread_mutex_unlock(&channel->lock); |
b99a8d42 JD |
4331 | ret = 0; |
4332 | goto end; | |
4333 | ||
4334 | end_unlock_stream: | |
4335 | pthread_mutex_unlock(&stream->lock); | |
c35f9726 | 4336 | end_unlock_channel: |
b99a8d42 JD |
4337 | pthread_mutex_unlock(&channel->lock); |
4338 | end: | |
c35f9726 | 4339 | lttng_dynamic_array_reset(&stream_rotation_positions); |
b32703d6 | 4340 | lttng_dynamic_pointer_array_reset(&streams_packet_to_open); |
b99a8d42 JD |
4341 | return ret; |
4342 | } | |
4343 | ||
28ab034a | 4344 | static int consumer_clear_buffer(struct lttng_consumer_stream *stream) |
5f3aff8b MD |
4345 | { |
4346 | int ret = 0; | |
4347 | unsigned long consumed_pos_before, consumed_pos_after; | |
4348 | ||
4349 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
4350 | if (ret < 0) { | |
4351 | ERR("Taking snapshot positions"); | |
4352 | goto end; | |
4353 | } | |
4354 | ||
4355 | ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos_before); | |
4356 | if (ret < 0) { | |
4357 | ERR("Consumed snapshot position"); | |
4358 | goto end; | |
4359 | } | |
4360 | ||
fa29bfbf | 4361 | switch (the_consumer_data.type) { |
5f3aff8b MD |
4362 | case LTTNG_CONSUMER_KERNEL: |
4363 | ret = kernctl_buffer_clear(stream->wait_fd); | |
4364 | if (ret < 0) { | |
96393977 | 4365 | ERR("Failed to clear kernel stream (ret = %d)", ret); |
5f3aff8b MD |
4366 | goto end; |
4367 | } | |
4368 | break; | |
4369 | case LTTNG_CONSUMER32_UST: | |
4370 | case LTTNG_CONSUMER64_UST: | |
881fc67f MD |
4371 | ret = lttng_ustconsumer_clear_buffer(stream); |
4372 | if (ret < 0) { | |
4373 | ERR("Failed to clear ust stream (ret = %d)", ret); | |
4374 | goto end; | |
4375 | } | |
5f3aff8b MD |
4376 | break; |
4377 | default: | |
4378 | ERR("Unknown consumer_data type"); | |
4379 | abort(); | |
4380 | } | |
4381 | ||
4382 | ret = lttng_consumer_sample_snapshot_positions(stream); | |
4383 | if (ret < 0) { | |
4384 | ERR("Taking snapshot positions"); | |
4385 | goto end; | |
4386 | } | |
4387 | ret = lttng_consumer_get_consumed_snapshot(stream, &consumed_pos_after); | |
4388 | if (ret < 0) { | |
4389 | ERR("Consumed snapshot position"); | |
4390 | goto end; | |
4391 | } | |
4392 | DBG("clear: before: %lu after: %lu", consumed_pos_before, consumed_pos_after); | |
4393 | end: | |
4394 | return ret; | |
4395 | } | |
4396 | ||
28ab034a | 4397 | static int consumer_clear_stream(struct lttng_consumer_stream *stream) |
5f3aff8b MD |
4398 | { |
4399 | int ret; | |
4400 | ||
cd9adb8b | 4401 | ret = consumer_stream_flush_buffer(stream, true); |
5f3aff8b | 4402 | if (ret < 0) { |
28ab034a | 4403 | ERR("Failed to flush stream %" PRIu64 " during channel clear", stream->key); |
5f3aff8b MD |
4404 | ret = LTTCOMM_CONSUMERD_FATAL; |
4405 | goto error; | |
4406 | } | |
4407 | ||
4408 | ret = consumer_clear_buffer(stream); | |
4409 | if (ret < 0) { | |
28ab034a | 4410 | ERR("Failed to clear stream %" PRIu64 " during channel clear", stream->key); |
5f3aff8b MD |
4411 | ret = LTTCOMM_CONSUMERD_FATAL; |
4412 | goto error; | |
4413 | } | |
4414 | ||
4415 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
4416 | error: | |
4417 | return ret; | |
4418 | } | |
4419 | ||
28ab034a | 4420 | static int consumer_clear_unmonitored_channel(struct lttng_consumer_channel *channel) |
5f3aff8b MD |
4421 | { |
4422 | int ret; | |
4423 | struct lttng_consumer_stream *stream; | |
4424 | ||
56047f5a | 4425 | lttng::urcu::read_lock_guard read_lock; |
5f3aff8b | 4426 | pthread_mutex_lock(&channel->lock); |
28ab034a | 4427 | cds_list_for_each_entry (stream, &channel->streams.head, send_node) { |
5f3aff8b MD |
4428 | health_code_update(); |
4429 | pthread_mutex_lock(&stream->lock); | |
4430 | ret = consumer_clear_stream(stream); | |
4431 | if (ret) { | |
4432 | goto error_unlock; | |
4433 | } | |
4434 | pthread_mutex_unlock(&stream->lock); | |
4435 | } | |
4436 | pthread_mutex_unlock(&channel->lock); | |
5f3aff8b MD |
4437 | return 0; |
4438 | ||
4439 | error_unlock: | |
4440 | pthread_mutex_unlock(&stream->lock); | |
4441 | pthread_mutex_unlock(&channel->lock); | |
5f3aff8b MD |
4442 | return ret; |
4443 | } | |
4444 | ||
02d02e31 JD |
4445 | /* |
4446 | * Check if a stream is ready to be rotated after extracting it. | |
4447 | * | |
4448 | * Return 1 if it is ready for rotation, 0 if it is not, a negative value on | |
4449 | * error. Stream lock must be held. | |
4450 | */ | |
4451 | int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream *stream) | |
4452 | { | |
28ab034a JG |
4453 | DBG("Check is rotate ready for stream %" PRIu64 " ready %u rotate_position %" PRIu64 |
4454 | " last_sequence_number %" PRIu64, | |
4455 | stream->key, | |
4456 | stream->rotate_ready, | |
4457 | stream->rotate_position, | |
4458 | stream->last_sequence_number); | |
02d02e31 | 4459 | if (stream->rotate_ready) { |
a40a503f | 4460 | return 1; |
02d02e31 JD |
4461 | } |
4462 | ||
4463 | /* | |
a40a503f MD |
4464 | * If packet seq num is unavailable, it means we are interacting |
4465 | * with a pre-2.8 lttng-modules which does not implement the | |
4466 | * sequence number. Rotation should never be used by sessiond in this | |
4467 | * scenario. | |
02d02e31 | 4468 | */ |
a40a503f MD |
4469 | if (stream->sequence_number_unavailable) { |
4470 | ERR("Internal error: rotation used on stream %" PRIu64 | |
28ab034a JG |
4471 | " with unavailable sequence number", |
4472 | stream->key); | |
a40a503f | 4473 | return -1; |
02d02e31 JD |
4474 | } |
4475 | ||
28ab034a | 4476 | if (stream->rotate_position == -1ULL || stream->last_sequence_number == -1ULL) { |
a40a503f | 4477 | return 0; |
02d02e31 JD |
4478 | } |
4479 | ||
a40a503f MD |
4480 | /* |
4481 | * Rotate position not reached yet. The stream rotate position is | |
4482 | * the position of the next packet belonging to the next trace chunk, | |
4483 | * but consumerd considers rotation ready when reaching the last | |
4484 | * packet of the current chunk, hence the "rotate_position - 1". | |
4485 | */ | |
f8528c7a | 4486 | |
28ab034a JG |
4487 | DBG("Check is rotate ready for stream %" PRIu64 " last_sequence_number %" PRIu64 |
4488 | " rotate_position %" PRIu64, | |
4489 | stream->key, | |
4490 | stream->last_sequence_number, | |
4491 | stream->rotate_position); | |
a40a503f MD |
4492 | if (stream->last_sequence_number >= stream->rotate_position - 1) { |
4493 | return 1; | |
02d02e31 | 4494 | } |
02d02e31 | 4495 | |
a40a503f | 4496 | return 0; |
02d02e31 JD |
4497 | } |
4498 | ||
d73bf3d7 JD |
4499 | /* |
4500 | * Reset the state for a stream after a rotation occurred. | |
4501 | */ | |
4502 | void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream *stream) | |
4503 | { | |
28ab034a | 4504 | DBG("lttng_consumer_reset_stream_rotate_state for stream %" PRIu64, stream->key); |
a40a503f | 4505 | stream->rotate_position = -1ULL; |
d73bf3d7 JD |
4506 | stream->rotate_ready = false; |
4507 | } | |
4508 | ||
4509 | /* | |
4510 | * Perform the rotation a local stream file. | |
4511 | */ | |
28ab034a | 4512 | static int rotate_local_stream(struct lttng_consumer_stream *stream) |
d73bf3d7 | 4513 | { |
d2956687 | 4514 | int ret = 0; |
d73bf3d7 | 4515 | |
d2956687 | 4516 | DBG("Rotate local stream: stream key %" PRIu64 ", channel key %" PRIu64, |
28ab034a JG |
4517 | stream->key, |
4518 | stream->chan->key); | |
d73bf3d7 | 4519 | stream->tracefile_size_current = 0; |
d2956687 | 4520 | stream->tracefile_count_current = 0; |
d73bf3d7 | 4521 | |
d2956687 JG |
4522 | if (stream->out_fd >= 0) { |
4523 | ret = close(stream->out_fd); | |
4524 | if (ret) { | |
4525 | PERROR("Failed to close stream out_fd of channel \"%s\"", | |
28ab034a | 4526 | stream->chan->name); |
d2956687 JG |
4527 | } |
4528 | stream->out_fd = -1; | |
4529 | } | |
d73bf3d7 | 4530 | |
d2956687 | 4531 | if (stream->index_file) { |
d73bf3d7 | 4532 | lttng_index_file_put(stream->index_file); |
cd9adb8b | 4533 | stream->index_file = nullptr; |
d73bf3d7 JD |
4534 | } |
4535 | ||
d2956687 JG |
4536 | if (!stream->trace_chunk) { |
4537 | goto end; | |
4538 | } | |
d73bf3d7 | 4539 | |
d2956687 | 4540 | ret = consumer_stream_create_output_files(stream, true); |
d73bf3d7 JD |
4541 | end: |
4542 | return ret; | |
d73bf3d7 JD |
4543 | } |
4544 | ||
d73bf3d7 JD |
4545 | /* |
4546 | * Performs the stream rotation for the rotate session feature if needed. | |
d2956687 | 4547 | * It must be called with the channel and stream locks held. |
d73bf3d7 JD |
4548 | * |
4549 | * Return 0 on success, a negative number of error. | |
4550 | */ | |
f46376a1 | 4551 | int lttng_consumer_rotate_stream(struct lttng_consumer_stream *stream) |
d73bf3d7 JD |
4552 | { |
4553 | int ret; | |
4554 | ||
4555 | DBG("Consumer rotate stream %" PRIu64, stream->key); | |
4556 | ||
d2956687 JG |
4557 | /* |
4558 | * Update the stream's 'current' chunk to the session's (channel) | |
4559 | * now-current chunk. | |
4560 | */ | |
4561 | lttng_trace_chunk_put(stream->trace_chunk); | |
4562 | if (stream->chan->trace_chunk == stream->trace_chunk) { | |
4563 | /* | |
4564 | * A channel can be rotated and not have a "next" chunk | |
4565 | * to transition to. In that case, the channel's "current chunk" | |
4566 | * has not been closed yet, but it has not been updated to | |
4567 | * a "next" trace chunk either. Hence, the stream, like its | |
4568 | * parent channel, becomes part of no chunk and can't output | |
4569 | * anything until a new trace chunk is created. | |
4570 | */ | |
cd9adb8b | 4571 | stream->trace_chunk = nullptr; |
28ab034a | 4572 | } else if (stream->chan->trace_chunk && !lttng_trace_chunk_get(stream->chan->trace_chunk)) { |
d2956687 JG |
4573 | ERR("Failed to acquire a reference to channel's trace chunk during stream rotation"); |
4574 | ret = -1; | |
4575 | goto error; | |
4576 | } else { | |
4577 | /* | |
4578 | * Update the stream's trace chunk to its parent channel's | |
4579 | * current trace chunk. | |
4580 | */ | |
4581 | stream->trace_chunk = stream->chan->trace_chunk; | |
4582 | } | |
4583 | ||
c35f9726 | 4584 | if (stream->net_seq_idx == (uint64_t) -1ULL) { |
f46376a1 | 4585 | ret = rotate_local_stream(stream); |
c35f9726 JG |
4586 | if (ret < 0) { |
4587 | ERR("Failed to rotate stream, ret = %i", ret); | |
4588 | goto error; | |
4589 | } | |
d73bf3d7 JD |
4590 | } |
4591 | ||
d2956687 JG |
4592 | if (stream->metadata_flag && stream->trace_chunk) { |
4593 | /* | |
4594 | * If the stream has transitioned to a new trace | |
4595 | * chunk, the metadata should be re-dumped to the | |
4596 | * newest chunk. | |
4597 | * | |
4598 | * However, it is possible for a stream to transition to | |
4599 | * a "no-chunk" state. This can happen if a rotation | |
4600 | * occurs on an inactive session. In such cases, the metadata | |
4601 | * regeneration will happen when the next trace chunk is | |
4602 | * created. | |
4603 | */ | |
4604 | ret = consumer_metadata_stream_dump(stream); | |
4605 | if (ret) { | |
4606 | goto error; | |
d73bf3d7 JD |
4607 | } |
4608 | } | |
4609 | lttng_consumer_reset_stream_rotate_state(stream); | |
4610 | ||
4611 | ret = 0; | |
4612 | ||
4613 | error: | |
4614 | return ret; | |
4615 | } | |
4616 | ||
b99a8d42 JD |
4617 | /* |
4618 | * Rotate all the ready streams now. | |
4619 | * | |
4620 | * This is especially important for low throughput streams that have already | |
4621 | * been consumed, we cannot wait for their next packet to perform the | |
4622 | * rotation. | |
92b7a7f8 MD |
4623 | * Need to be called with RCU read-side lock held to ensure existence of |
4624 | * channel. | |
b99a8d42 JD |
4625 | * |
4626 | * Returns 0 on success, < 0 on error | |
4627 | */ | |
28ab034a | 4628 | int lttng_consumer_rotate_ready_streams(struct lttng_consumer_channel *channel, uint64_t key) |
b99a8d42 JD |
4629 | { |
4630 | int ret; | |
b99a8d42 JD |
4631 | struct lttng_consumer_stream *stream; |
4632 | struct lttng_ht_iter iter; | |
fa29bfbf | 4633 | struct lttng_ht *ht = the_consumer_data.stream_per_chan_id_ht; |
b99a8d42 | 4634 | |
48b7cdc2 FD |
4635 | ASSERT_RCU_READ_LOCKED(); |
4636 | ||
56047f5a | 4637 | lttng::urcu::read_lock_guard read_lock; |
b99a8d42 JD |
4638 | |
4639 | DBG("Consumer rotate ready streams in channel %" PRIu64, key); | |
4640 | ||
b99a8d42 | 4641 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
4642 | ht->hash_fct(&channel->key, lttng_ht_seed), |
4643 | ht->match_fct, | |
4644 | &channel->key, | |
4645 | &iter.iter, | |
4646 | stream, | |
4647 | node_channel_id.node) | |
4648 | { | |
b99a8d42 JD |
4649 | health_code_update(); |
4650 | ||
d2956687 | 4651 | pthread_mutex_lock(&stream->chan->lock); |
b99a8d42 JD |
4652 | pthread_mutex_lock(&stream->lock); |
4653 | ||
4654 | if (!stream->rotate_ready) { | |
4655 | pthread_mutex_unlock(&stream->lock); | |
d2956687 | 4656 | pthread_mutex_unlock(&stream->chan->lock); |
b99a8d42 JD |
4657 | continue; |
4658 | } | |
4659 | DBG("Consumer rotate ready stream %" PRIu64, stream->key); | |
4660 | ||
f46376a1 | 4661 | ret = lttng_consumer_rotate_stream(stream); |
b99a8d42 | 4662 | pthread_mutex_unlock(&stream->lock); |
d2956687 | 4663 | pthread_mutex_unlock(&stream->chan->lock); |
b99a8d42 JD |
4664 | if (ret) { |
4665 | goto end; | |
4666 | } | |
4667 | } | |
4668 | ||
4669 | ret = 0; | |
4670 | ||
4671 | end: | |
b99a8d42 JD |
4672 | return ret; |
4673 | } | |
4674 | ||
28ab034a JG |
4675 | enum lttcomm_return_code lttng_consumer_init_command(struct lttng_consumer_local_data *ctx, |
4676 | const lttng_uuid& sessiond_uuid) | |
00fb02ac | 4677 | { |
d2956687 | 4678 | enum lttcomm_return_code ret; |
c70636a7 | 4679 | char uuid_str[LTTNG_UUID_STR_LEN]; |
00fb02ac | 4680 | |
d2956687 JG |
4681 | if (ctx->sessiond_uuid.is_set) { |
4682 | ret = LTTCOMM_CONSUMERD_ALREADY_SET; | |
00fb02ac JD |
4683 | goto end; |
4684 | } | |
4685 | ||
d2956687 | 4686 | ctx->sessiond_uuid.is_set = true; |
328c2fe7 | 4687 | ctx->sessiond_uuid.value = sessiond_uuid; |
d2956687 JG |
4688 | ret = LTTCOMM_CONSUMERD_SUCCESS; |
4689 | lttng_uuid_to_str(sessiond_uuid, uuid_str); | |
4690 | DBG("Received session daemon UUID: %s", uuid_str); | |
00fb02ac JD |
4691 | end: |
4692 | return ret; | |
4693 | } | |
4694 | ||
28ab034a JG |
4695 | enum lttcomm_return_code |
4696 | lttng_consumer_create_trace_chunk(const uint64_t *relayd_id, | |
4697 | uint64_t session_id, | |
4698 | uint64_t chunk_id, | |
4699 | time_t chunk_creation_timestamp, | |
4700 | const char *chunk_override_name, | |
4701 | const struct lttng_credentials *credentials, | |
4702 | struct lttng_directory_handle *chunk_directory_handle) | |
00fb02ac JD |
4703 | { |
4704 | int ret; | |
d2956687 | 4705 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
cd9adb8b | 4706 | struct lttng_trace_chunk *created_chunk = nullptr, *published_chunk = nullptr; |
d2956687 JG |
4707 | enum lttng_trace_chunk_status chunk_status; |
4708 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4709 | char creation_timestamp_buffer[ISO8601_STR_LEN]; | |
4710 | const char *relayd_id_str = "(none)"; | |
4711 | const char *creation_timestamp_str; | |
4712 | struct lttng_ht_iter iter; | |
4713 | struct lttng_consumer_channel *channel; | |
92816cc3 | 4714 | |
d2956687 JG |
4715 | if (relayd_id) { |
4716 | /* Only used for logging purposes. */ | |
28ab034a | 4717 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), "%" PRIu64, *relayd_id); |
d2956687 JG |
4718 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { |
4719 | relayd_id_str = relayd_id_buffer; | |
4720 | } else { | |
4721 | relayd_id_str = "(formatting error)"; | |
4722 | } | |
d01ef216 | 4723 | } |
d2956687 | 4724 | |
d01ef216 | 4725 | /* Local protocol error. */ |
a0377dfe | 4726 | LTTNG_ASSERT(chunk_creation_timestamp); |
d2956687 | 4727 | ret = time_to_iso8601_str(chunk_creation_timestamp, |
28ab034a JG |
4728 | creation_timestamp_buffer, |
4729 | sizeof(creation_timestamp_buffer)); | |
4730 | creation_timestamp_str = !ret ? creation_timestamp_buffer : "(formatting error)"; | |
d2956687 JG |
4731 | |
4732 | DBG("Consumer create trace chunk command: relay_id = %s" | |
28ab034a JG |
4733 | ", session_id = %" PRIu64 ", chunk_id = %" PRIu64 ", chunk_override_name = %s" |
4734 | ", chunk_creation_timestamp = %s", | |
4735 | relayd_id_str, | |
4736 | session_id, | |
4737 | chunk_id, | |
4738 | chunk_override_name ?: "(none)", | |
4739 | creation_timestamp_str); | |
92816cc3 JG |
4740 | |
4741 | /* | |
d2956687 JG |
4742 | * The trace chunk registry, as used by the consumer daemon, implicitly |
4743 | * owns the trace chunks. This is only needed in the consumer since | |
4744 | * the consumer has no notion of a session beyond session IDs being | |
4745 | * used to identify other objects. | |
4746 | * | |
4747 | * The lttng_trace_chunk_registry_publish() call below provides a | |
4748 | * reference which is not released; it implicitly becomes the session | |
4749 | * daemon's reference to the chunk in the consumer daemon. | |
4750 | * | |
4751 | * The lifetime of trace chunks in the consumer daemon is managed by | |
4752 | * the session daemon through the LTTNG_CONSUMER_CREATE_TRACE_CHUNK | |
4753 | * and LTTNG_CONSUMER_DESTROY_TRACE_CHUNK commands. | |
92816cc3 | 4754 | */ |
cd9adb8b | 4755 | created_chunk = lttng_trace_chunk_create(chunk_id, chunk_creation_timestamp, nullptr); |
d2956687 JG |
4756 | if (!created_chunk) { |
4757 | ERR("Failed to create trace chunk"); | |
4758 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4759 | goto error; |
d2956687 | 4760 | } |
92816cc3 | 4761 | |
d2956687 | 4762 | if (chunk_override_name) { |
28ab034a | 4763 | chunk_status = lttng_trace_chunk_override_name(created_chunk, chunk_override_name); |
d2956687 JG |
4764 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
4765 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4766 | goto error; |
92816cc3 JG |
4767 | } |
4768 | } | |
4769 | ||
d2956687 | 4770 | if (chunk_directory_handle) { |
28ab034a | 4771 | chunk_status = lttng_trace_chunk_set_credentials(created_chunk, credentials); |
d2956687 JG |
4772 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
4773 | ERR("Failed to set trace chunk credentials"); | |
4774 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4775 | goto error; |
d2956687 JG |
4776 | } |
4777 | /* | |
4778 | * The consumer daemon has no ownership of the chunk output | |
4779 | * directory. | |
4780 | */ | |
28ab034a | 4781 | chunk_status = lttng_trace_chunk_set_as_user(created_chunk, chunk_directory_handle); |
cd9adb8b | 4782 | chunk_directory_handle = nullptr; |
d2956687 JG |
4783 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
4784 | ERR("Failed to set trace chunk's directory handle"); | |
4785 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4786 | goto error; |
92816cc3 JG |
4787 | } |
4788 | } | |
4789 | ||
d2956687 | 4790 | published_chunk = lttng_trace_chunk_registry_publish_chunk( |
28ab034a | 4791 | the_consumer_data.chunk_registry, session_id, created_chunk); |
d2956687 | 4792 | lttng_trace_chunk_put(created_chunk); |
cd9adb8b | 4793 | created_chunk = nullptr; |
d2956687 JG |
4794 | if (!published_chunk) { |
4795 | ERR("Failed to publish trace chunk"); | |
4796 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4797 | goto error; |
d88744a4 JD |
4798 | } |
4799 | ||
28ab034a | 4800 | { |
56047f5a JG |
4801 | lttng::urcu::read_lock_guard read_lock; |
4802 | cds_lfht_for_each_entry_duplicate( | |
4803 | the_consumer_data.channels_by_session_id_ht->ht, | |
4804 | the_consumer_data.channels_by_session_id_ht->hash_fct(&session_id, | |
4805 | lttng_ht_seed), | |
4806 | the_consumer_data.channels_by_session_id_ht->match_fct, | |
4807 | &session_id, | |
4808 | &iter.iter, | |
4809 | channel, | |
4810 | channels_by_session_id_ht_node.node) | |
4811 | { | |
4812 | ret = lttng_consumer_channel_set_trace_chunk(channel, published_chunk); | |
4813 | if (ret) { | |
4814 | /* | |
4815 | * Roll-back the creation of this chunk. | |
4816 | * | |
4817 | * This is important since the session daemon will | |
4818 | * assume that the creation of this chunk failed and | |
4819 | * will never ask for it to be closed, resulting | |
4820 | * in a leak and an inconsistent state for some | |
4821 | * channels. | |
4822 | */ | |
4823 | enum lttcomm_return_code close_ret; | |
4824 | char path[LTTNG_PATH_MAX]; | |
4825 | ||
4826 | DBG("Failed to set new trace chunk on existing channels, rolling back"); | |
4827 | close_ret = | |
4828 | lttng_consumer_close_trace_chunk(relayd_id, | |
4829 | session_id, | |
4830 | chunk_id, | |
4831 | chunk_creation_timestamp, | |
4832 | nullptr, | |
4833 | path); | |
4834 | if (close_ret != LTTCOMM_CONSUMERD_SUCCESS) { | |
4835 | ERR("Failed to roll-back the creation of new chunk: session_id = %" PRIu64 | |
4836 | ", chunk_id = %" PRIu64, | |
4837 | session_id, | |
4838 | chunk_id); | |
4839 | } | |
d2956687 | 4840 | |
56047f5a JG |
4841 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; |
4842 | break; | |
d2956687 | 4843 | } |
d2956687 | 4844 | } |
a1ae2ea5 JD |
4845 | } |
4846 | ||
e5add6d0 JG |
4847 | if (relayd_id) { |
4848 | struct consumer_relayd_sock_pair *relayd; | |
4849 | ||
4850 | relayd = consumer_find_relayd(*relayd_id); | |
4851 | if (relayd) { | |
4852 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
28ab034a | 4853 | ret = relayd_create_trace_chunk(&relayd->control_sock, published_chunk); |
e5add6d0 JG |
4854 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
4855 | } else { | |
4856 | ERR("Failed to find relay daemon socket: relayd_id = %" PRIu64, *relayd_id); | |
4857 | } | |
4858 | ||
4859 | if (!relayd || ret) { | |
4860 | enum lttcomm_return_code close_ret; | |
ecd1a12f | 4861 | char path[LTTNG_PATH_MAX]; |
e5add6d0 JG |
4862 | |
4863 | close_ret = lttng_consumer_close_trace_chunk(relayd_id, | |
28ab034a JG |
4864 | session_id, |
4865 | chunk_id, | |
4866 | chunk_creation_timestamp, | |
cd9adb8b | 4867 | nullptr, |
28ab034a | 4868 | path); |
e5add6d0 | 4869 | if (close_ret != LTTCOMM_CONSUMERD_SUCCESS) { |
28ab034a JG |
4870 | ERR("Failed to roll-back the creation of new chunk: session_id = %" PRIu64 |
4871 | ", chunk_id = %" PRIu64, | |
4872 | session_id, | |
4873 | chunk_id); | |
e5add6d0 JG |
4874 | } |
4875 | ||
4876 | ret_code = LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED; | |
7ea24db3 | 4877 | goto error_unlock; |
e5add6d0 JG |
4878 | } |
4879 | } | |
7ea24db3 | 4880 | error_unlock: |
7ea24db3 | 4881 | error: |
d2956687 JG |
4882 | /* Release the reference returned by the "publish" operation. */ |
4883 | lttng_trace_chunk_put(published_chunk); | |
9bb5f1f8 | 4884 | lttng_trace_chunk_put(created_chunk); |
d2956687 | 4885 | return ret_code; |
a1ae2ea5 JD |
4886 | } |
4887 | ||
28ab034a JG |
4888 | enum lttcomm_return_code |
4889 | lttng_consumer_close_trace_chunk(const uint64_t *relayd_id, | |
4890 | uint64_t session_id, | |
4891 | uint64_t chunk_id, | |
4892 | time_t chunk_close_timestamp, | |
4893 | const enum lttng_trace_chunk_command_type *close_command, | |
4894 | char *path) | |
a1ae2ea5 | 4895 | { |
d2956687 JG |
4896 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
4897 | struct lttng_trace_chunk *chunk; | |
4898 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; | |
4899 | const char *relayd_id_str = "(none)"; | |
bbc4768c | 4900 | const char *close_command_name = "none"; |
d2956687 JG |
4901 | struct lttng_ht_iter iter; |
4902 | struct lttng_consumer_channel *channel; | |
4903 | enum lttng_trace_chunk_status chunk_status; | |
a1ae2ea5 | 4904 | |
d2956687 JG |
4905 | if (relayd_id) { |
4906 | int ret; | |
4907 | ||
4908 | /* Only used for logging purposes. */ | |
28ab034a | 4909 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), "%" PRIu64, *relayd_id); |
d2956687 JG |
4910 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { |
4911 | relayd_id_str = relayd_id_buffer; | |
4912 | } else { | |
4913 | relayd_id_str = "(formatting error)"; | |
4914 | } | |
bbc4768c JG |
4915 | } |
4916 | if (close_command) { | |
28ab034a | 4917 | close_command_name = lttng_trace_chunk_command_type_get_name(*close_command); |
bbc4768c | 4918 | } |
d2956687 JG |
4919 | |
4920 | DBG("Consumer close trace chunk command: relayd_id = %s" | |
28ab034a JG |
4921 | ", session_id = %" PRIu64 ", chunk_id = %" PRIu64 ", close command = %s", |
4922 | relayd_id_str, | |
4923 | session_id, | |
4924 | chunk_id, | |
4925 | close_command_name); | |
bbc4768c | 4926 | |
d2956687 | 4927 | chunk = lttng_trace_chunk_registry_find_chunk( |
28ab034a | 4928 | the_consumer_data.chunk_registry, session_id, chunk_id); |
bbc4768c | 4929 | if (!chunk) { |
28ab034a JG |
4930 | ERR("Failed to find chunk: session_id = %" PRIu64 ", chunk_id = %" PRIu64, |
4931 | session_id, | |
4932 | chunk_id); | |
d2956687 | 4933 | ret_code = LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; |
a1ae2ea5 JD |
4934 | goto end; |
4935 | } | |
4936 | ||
28ab034a | 4937 | chunk_status = lttng_trace_chunk_set_close_timestamp(chunk, chunk_close_timestamp); |
d2956687 JG |
4938 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
4939 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4940 | goto end; | |
45f1d9a1 | 4941 | } |
bbc4768c JG |
4942 | |
4943 | if (close_command) { | |
28ab034a | 4944 | chunk_status = lttng_trace_chunk_set_close_command(chunk, *close_command); |
bbc4768c JG |
4945 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
4946 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4947 | goto end; | |
4948 | } | |
4949 | } | |
a1ae2ea5 | 4950 | |
d2956687 JG |
4951 | /* |
4952 | * chunk is now invalid to access as we no longer hold a reference to | |
4953 | * it; it is only kept around to compare it (by address) to the | |
4954 | * current chunk found in the session's channels. | |
4955 | */ | |
56047f5a JG |
4956 | { |
4957 | lttng::urcu::read_lock_guard read_lock; | |
4958 | cds_lfht_for_each_entry ( | |
4959 | the_consumer_data.channel_ht->ht, &iter.iter, channel, node.node) { | |
4960 | int ret; | |
a1ae2ea5 | 4961 | |
d2956687 | 4962 | /* |
56047f5a JG |
4963 | * Only change the channel's chunk to NULL if it still |
4964 | * references the chunk being closed. The channel may | |
4965 | * reference a newer channel in the case of a session | |
4966 | * rotation. When a session rotation occurs, the "next" | |
4967 | * chunk is created before the "current" chunk is closed. | |
d2956687 | 4968 | */ |
56047f5a JG |
4969 | if (channel->trace_chunk != chunk) { |
4970 | continue; | |
4971 | } | |
4972 | ret = lttng_consumer_channel_set_trace_chunk(channel, nullptr); | |
4973 | if (ret) { | |
4974 | /* | |
4975 | * Attempt to close the chunk on as many channels as | |
4976 | * possible. | |
4977 | */ | |
4978 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4979 | } | |
d2956687 | 4980 | } |
a1ae2ea5 | 4981 | } |
bbc4768c JG |
4982 | if (relayd_id) { |
4983 | int ret; | |
4984 | struct consumer_relayd_sock_pair *relayd; | |
4985 | ||
4986 | relayd = consumer_find_relayd(*relayd_id); | |
4987 | if (relayd) { | |
4988 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
28ab034a | 4989 | ret = relayd_close_trace_chunk(&relayd->control_sock, chunk, path); |
bbc4768c JG |
4990 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
4991 | } else { | |
28ab034a | 4992 | ERR("Failed to find relay daemon socket: relayd_id = %" PRIu64, *relayd_id); |
bbc4768c JG |
4993 | } |
4994 | ||
4995 | if (!relayd || ret) { | |
4996 | ret_code = LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED; | |
4997 | goto error_unlock; | |
4998 | } | |
4999 | } | |
5000 | error_unlock: | |
d2956687 | 5001 | end: |
bbc4768c JG |
5002 | /* |
5003 | * Release the reference returned by the "find" operation and | |
5004 | * the session daemon's implicit reference to the chunk. | |
5005 | */ | |
5006 | lttng_trace_chunk_put(chunk); | |
5007 | lttng_trace_chunk_put(chunk); | |
5008 | ||
d2956687 | 5009 | return ret_code; |
a1ae2ea5 | 5010 | } |
3654ed19 | 5011 | |
28ab034a JG |
5012 | enum lttcomm_return_code |
5013 | lttng_consumer_trace_chunk_exists(const uint64_t *relayd_id, uint64_t session_id, uint64_t chunk_id) | |
3654ed19 | 5014 | { |
c35f9726 | 5015 | int ret; |
d2956687 | 5016 | enum lttcomm_return_code ret_code; |
d2956687 JG |
5017 | char relayd_id_buffer[MAX_INT_DEC_LEN(*relayd_id)]; |
5018 | const char *relayd_id_str = "(none)"; | |
c35f9726 | 5019 | const bool is_local_trace = !relayd_id; |
cd9adb8b | 5020 | struct consumer_relayd_sock_pair *relayd = nullptr; |
6b584c2e | 5021 | bool chunk_exists_local, chunk_exists_remote; |
56047f5a | 5022 | lttng::urcu::read_lock_guard read_lock; |
d2956687 JG |
5023 | |
5024 | if (relayd_id) { | |
d2956687 | 5025 | /* Only used for logging purposes. */ |
28ab034a | 5026 | ret = snprintf(relayd_id_buffer, sizeof(relayd_id_buffer), "%" PRIu64, *relayd_id); |
d2956687 JG |
5027 | if (ret > 0 && ret < sizeof(relayd_id_buffer)) { |
5028 | relayd_id_str = relayd_id_buffer; | |
5029 | } else { | |
5030 | relayd_id_str = "(formatting error)"; | |
5031 | } | |
d01ef216 | 5032 | } |
d2956687 JG |
5033 | |
5034 | DBG("Consumer trace chunk exists command: relayd_id = %s" | |
28ab034a JG |
5035 | ", chunk_id = %" PRIu64, |
5036 | relayd_id_str, | |
5037 | chunk_id); | |
6b584c2e | 5038 | ret = lttng_trace_chunk_registry_chunk_exists( |
28ab034a | 5039 | the_consumer_data.chunk_registry, session_id, chunk_id, &chunk_exists_local); |
6b584c2e JG |
5040 | if (ret) { |
5041 | /* Internal error. */ | |
5042 | ERR("Failed to query the existence of a trace chunk"); | |
5043 | ret_code = LTTCOMM_CONSUMERD_FATAL; | |
13e3b280 | 5044 | goto end; |
6b584c2e | 5045 | } |
28ab034a | 5046 | DBG("Trace chunk %s locally", chunk_exists_local ? "exists" : "does not exist"); |
6b584c2e | 5047 | if (chunk_exists_local) { |
c35f9726 | 5048 | ret_code = LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL; |
c35f9726 JG |
5049 | goto end; |
5050 | } else if (is_local_trace) { | |
5051 | ret_code = LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; | |
5052 | goto end; | |
5053 | } | |
5054 | ||
c35f9726 JG |
5055 | relayd = consumer_find_relayd(*relayd_id); |
5056 | if (!relayd) { | |
5057 | ERR("Failed to find relayd %" PRIu64, *relayd_id); | |
5058 | ret_code = LTTCOMM_CONSUMERD_INVALID_PARAMETERS; | |
5059 | goto end_rcu_unlock; | |
5060 | } | |
5061 | DBG("Looking up existence of trace chunk on relay daemon"); | |
5062 | pthread_mutex_lock(&relayd->ctrl_sock_mutex); | |
28ab034a | 5063 | ret = relayd_trace_chunk_exists(&relayd->control_sock, chunk_id, &chunk_exists_remote); |
c35f9726 JG |
5064 | pthread_mutex_unlock(&relayd->ctrl_sock_mutex); |
5065 | if (ret < 0) { | |
5066 | ERR("Failed to look-up the existence of trace chunk on relay daemon"); | |
5067 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
5068 | goto end_rcu_unlock; | |
5069 | } | |
5070 | ||
28ab034a JG |
5071 | ret_code = chunk_exists_remote ? LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_REMOTE : |
5072 | LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK; | |
5073 | DBG("Trace chunk %s on relay daemon", chunk_exists_remote ? "exists" : "does not exist"); | |
d2956687 | 5074 | |
c35f9726 | 5075 | end_rcu_unlock: |
c35f9726 | 5076 | end: |
d2956687 | 5077 | return ret_code; |
3654ed19 | 5078 | } |
5f3aff8b | 5079 | |
28ab034a | 5080 | static int consumer_clear_monitored_channel(struct lttng_consumer_channel *channel) |
5f3aff8b MD |
5081 | { |
5082 | struct lttng_ht *ht; | |
5083 | struct lttng_consumer_stream *stream; | |
5084 | struct lttng_ht_iter iter; | |
5085 | int ret; | |
5086 | ||
fa29bfbf | 5087 | ht = the_consumer_data.stream_per_chan_id_ht; |
5f3aff8b | 5088 | |
56047f5a | 5089 | lttng::urcu::read_lock_guard read_lock; |
5f3aff8b | 5090 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
5091 | ht->hash_fct(&channel->key, lttng_ht_seed), |
5092 | ht->match_fct, | |
5093 | &channel->key, | |
5094 | &iter.iter, | |
5095 | stream, | |
5096 | node_channel_id.node) | |
5097 | { | |
5f3aff8b MD |
5098 | /* |
5099 | * Protect against teardown with mutex. | |
5100 | */ | |
5101 | pthread_mutex_lock(&stream->lock); | |
5102 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
5103 | goto next; | |
5104 | } | |
5105 | ret = consumer_clear_stream(stream); | |
5106 | if (ret) { | |
5107 | goto error_unlock; | |
5108 | } | |
5109 | next: | |
5110 | pthread_mutex_unlock(&stream->lock); | |
5111 | } | |
5f3aff8b MD |
5112 | return LTTCOMM_CONSUMERD_SUCCESS; |
5113 | ||
5114 | error_unlock: | |
5115 | pthread_mutex_unlock(&stream->lock); | |
5f3aff8b MD |
5116 | return ret; |
5117 | } | |
5118 | ||
5119 | int lttng_consumer_clear_channel(struct lttng_consumer_channel *channel) | |
5120 | { | |
5121 | int ret; | |
5122 | ||
5123 | DBG("Consumer clear channel %" PRIu64, channel->key); | |
5124 | ||
5125 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
5126 | /* | |
5127 | * Nothing to do for the metadata channel/stream. | |
5128 | * Snapshot mechanism already take care of the metadata | |
5129 | * handling/generation, and monitored channels only need to | |
5130 | * have their data stream cleared.. | |
5131 | */ | |
5132 | ret = LTTCOMM_CONSUMERD_SUCCESS; | |
5133 | goto end; | |
5134 | } | |
5135 | ||
5136 | if (!channel->monitor) { | |
5137 | ret = consumer_clear_unmonitored_channel(channel); | |
5138 | } else { | |
5139 | ret = consumer_clear_monitored_channel(channel); | |
5140 | } | |
5141 | end: | |
5142 | return ret; | |
5143 | } | |
04ed9e10 | 5144 | |
28ab034a | 5145 | enum lttcomm_return_code lttng_consumer_open_channel_packets(struct lttng_consumer_channel *channel) |
04ed9e10 JG |
5146 | { |
5147 | struct lttng_consumer_stream *stream; | |
5148 | enum lttcomm_return_code ret = LTTCOMM_CONSUMERD_SUCCESS; | |
5149 | ||
5150 | if (channel->metadata_stream) { | |
5151 | ERR("Open channel packets command attempted on a metadata channel"); | |
5152 | ret = LTTCOMM_CONSUMERD_INVALID_PARAMETERS; | |
5153 | goto end; | |
5154 | } | |
5155 | ||
56047f5a JG |
5156 | { |
5157 | lttng::urcu::read_lock_guard read_lock; | |
5158 | cds_list_for_each_entry (stream, &channel->streams.head, send_node) { | |
5159 | enum consumer_stream_open_packet_status status; | |
04ed9e10 | 5160 | |
56047f5a JG |
5161 | pthread_mutex_lock(&stream->lock); |
5162 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
5163 | goto next; | |
5164 | } | |
04ed9e10 | 5165 | |
56047f5a JG |
5166 | status = consumer_stream_open_packet(stream); |
5167 | switch (status) { | |
5168 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_OPENED: | |
5169 | DBG("Opened a packet in \"open channel packets\" command: stream id = %" PRIu64 | |
5170 | ", channel name = %s, session id = %" PRIu64, | |
5171 | stream->key, | |
5172 | stream->chan->name, | |
5173 | stream->chan->session_id); | |
5174 | stream->opened_packet_in_current_trace_chunk = true; | |
5175 | break; | |
5176 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_NO_SPACE: | |
5177 | DBG("No space left to open a packet in \"open channel packets\" command: stream id = %" PRIu64 | |
5178 | ", channel name = %s, session id = %" PRIu64, | |
5179 | stream->key, | |
5180 | stream->chan->name, | |
5181 | stream->chan->session_id); | |
5182 | break; | |
5183 | case CONSUMER_STREAM_OPEN_PACKET_STATUS_ERROR: | |
5184 | /* | |
5185 | * Only unexpected internal errors can lead to this | |
5186 | * failing. Report an unknown error. | |
5187 | */ | |
5188 | ERR("Failed to flush empty buffer in \"open channel packets\" command: stream id = %" PRIu64 | |
5189 | ", channel id = %" PRIu64 ", channel name = %s" | |
5190 | ", session id = %" PRIu64, | |
5191 | stream->key, | |
5192 | channel->key, | |
5193 | channel->name, | |
5194 | channel->session_id); | |
5195 | ret = LTTCOMM_CONSUMERD_UNKNOWN_ERROR; | |
5196 | goto error_unlock; | |
5197 | default: | |
5198 | abort(); | |
5199 | } | |
04ed9e10 | 5200 | |
56047f5a JG |
5201 | next: |
5202 | pthread_mutex_unlock(&stream->lock); | |
5203 | } | |
04ed9e10 | 5204 | } |
04ed9e10 | 5205 | end_rcu_unlock: |
04ed9e10 JG |
5206 | end: |
5207 | return ret; | |
5208 | ||
5209 | error_unlock: | |
5210 | pthread_mutex_unlock(&stream->lock); | |
5211 | goto end_rcu_unlock; | |
5212 | } | |
881fc67f MD |
5213 | |
5214 | void lttng_consumer_sigbus_handle(void *addr) | |
5215 | { | |
5216 | lttng_ustconsumer_sigbus_handle(addr); | |
5217 | } |