Commit | Line | Data |
---|---|---|
3bd1e081 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3bd1e081 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
3bd1e081 | 7 | * |
3bd1e081 MD |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
28ab034a JG |
11 | #include "ust-consumer.hpp" |
12 | ||
13 | #include <common/common.hpp> | |
14 | #include <common/compat/endian.hpp> | |
28ab034a JG |
15 | #include <common/consumer/consumer-metadata-cache.hpp> |
16 | #include <common/consumer/consumer-stream.hpp> | |
17 | #include <common/consumer/consumer-timer.hpp> | |
18 | #include <common/consumer/consumer.hpp> | |
19 | #include <common/index/index.hpp> | |
20 | #include <common/optional.hpp> | |
21 | #include <common/relayd/relayd.hpp> | |
22 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
23 | #include <common/shm.hpp> | |
56047f5a | 24 | #include <common/urcu.hpp> |
28ab034a JG |
25 | #include <common/utils.hpp> |
26 | ||
f02e1e8a | 27 | #include <lttng/ust-ctl.h> |
881fc67f | 28 | #include <lttng/ust-sigbus.h> |
28ab034a JG |
29 | |
30 | #include <bin/lttng-consumerd/health-consumerd.hpp> | |
671e39d7 | 31 | #include <fcntl.h> |
28ab034a | 32 | #include <inttypes.h> |
3bd1e081 MD |
33 | #include <poll.h> |
34 | #include <pthread.h> | |
28ab034a JG |
35 | #include <signal.h> |
36 | #include <stdbool.h> | |
37 | #include <stdint.h> | |
3bd1e081 MD |
38 | #include <stdlib.h> |
39 | #include <string.h> | |
40 | #include <sys/mman.h> | |
41 | #include <sys/socket.h> | |
dbb5dfe6 | 42 | #include <sys/stat.h> |
3bd1e081 MD |
43 | #include <sys/types.h> |
44 | #include <unistd.h> | |
ffe60014 | 45 | #include <urcu/list.h> |
0857097f | 46 | |
28ab034a | 47 | #define INT_MAX_STR_LEN 12 /* includes \0 */ |
4628484a | 48 | |
fa29bfbf | 49 | extern struct lttng_consumer_global_data the_consumer_data; |
3bd1e081 | 50 | extern int consumer_poll_timeout; |
3bd1e081 | 51 | |
4bd69c5f | 52 | LTTNG_EXPORT DEFINE_LTTNG_UST_SIGBUS_STATE(); |
881fc67f | 53 | |
3bd1e081 | 54 | /* |
ffe60014 | 55 | * Add channel to internal consumer state. |
3bd1e081 | 56 | * |
ffe60014 | 57 | * Returns 0 on success or else a negative value. |
3bd1e081 | 58 | */ |
ffe60014 | 59 | static int add_channel(struct lttng_consumer_channel *channel, |
28ab034a | 60 | struct lttng_consumer_local_data *ctx) |
3bd1e081 MD |
61 | { |
62 | int ret = 0; | |
63 | ||
a0377dfe FD |
64 | LTTNG_ASSERT(channel); |
65 | LTTNG_ASSERT(ctx); | |
ffe60014 | 66 | |
cd9adb8b | 67 | if (ctx->on_recv_channel != nullptr) { |
ffe60014 DG |
68 | ret = ctx->on_recv_channel(channel); |
69 | if (ret == 0) { | |
d8ef542d | 70 | ret = consumer_add_channel(channel, ctx); |
ffe60014 DG |
71 | } else if (ret < 0) { |
72 | /* Most likely an ENOMEM. */ | |
73 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
74 | goto error; | |
75 | } | |
76 | } else { | |
d8ef542d | 77 | ret = consumer_add_channel(channel, ctx); |
3bd1e081 MD |
78 | } |
79 | ||
d88aee68 | 80 | DBG("UST consumer channel added (key: %" PRIu64 ")", channel->key); |
ffe60014 DG |
81 | |
82 | error: | |
3bd1e081 MD |
83 | return ret; |
84 | } | |
85 | ||
ffe60014 DG |
86 | /* |
87 | * Allocate and return a consumer stream object. If _alloc_ret is not NULL, the | |
88 | * error value if applicable is set in it else it is kept untouched. | |
3bd1e081 | 89 | * |
ffe60014 | 90 | * Return NULL on error else the newly allocated stream object. |
3bd1e081 | 91 | */ |
28ab034a JG |
92 | static struct lttng_consumer_stream *allocate_stream(int cpu, |
93 | int key, | |
94 | struct lttng_consumer_channel *channel, | |
95 | struct lttng_consumer_local_data *ctx, | |
96 | int *_alloc_ret) | |
ffe60014 DG |
97 | { |
98 | int alloc_ret; | |
cd9adb8b | 99 | struct lttng_consumer_stream *stream = nullptr; |
ffe60014 | 100 | |
a0377dfe FD |
101 | LTTNG_ASSERT(channel); |
102 | LTTNG_ASSERT(ctx); | |
ffe60014 | 103 | |
28ab034a JG |
104 | stream = consumer_stream_create(channel, |
105 | channel->key, | |
106 | key, | |
107 | channel->name, | |
108 | channel->relayd_id, | |
109 | channel->session_id, | |
110 | channel->trace_chunk, | |
111 | cpu, | |
112 | &alloc_ret, | |
113 | channel->type, | |
114 | channel->monitor); | |
cd9adb8b | 115 | if (stream == nullptr) { |
ffe60014 DG |
116 | switch (alloc_ret) { |
117 | case -ENOENT: | |
118 | /* | |
119 | * We could not find the channel. Can happen if cpu hotplug | |
120 | * happens while tearing down. | |
121 | */ | |
122 | DBG3("Could not find channel"); | |
123 | break; | |
124 | case -ENOMEM: | |
125 | case -EINVAL: | |
126 | default: | |
127 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
128 | break; | |
129 | } | |
130 | goto error; | |
131 | } | |
132 | ||
d9a2e16e | 133 | consumer_stream_update_channel_attributes(stream, channel); |
ffe60014 DG |
134 | |
135 | error: | |
136 | if (_alloc_ret) { | |
137 | *_alloc_ret = alloc_ret; | |
138 | } | |
139 | return stream; | |
140 | } | |
141 | ||
142 | /* | |
143 | * Send the given stream pointer to the corresponding thread. | |
144 | * | |
145 | * Returns 0 on success else a negative value. | |
146 | */ | |
147 | static int send_stream_to_thread(struct lttng_consumer_stream *stream, | |
28ab034a | 148 | struct lttng_consumer_local_data *ctx) |
ffe60014 | 149 | { |
dae10966 DG |
150 | int ret; |
151 | struct lttng_pipe *stream_pipe; | |
ffe60014 DG |
152 | |
153 | /* Get the right pipe where the stream will be sent. */ | |
154 | if (stream->metadata_flag) { | |
66d583dc | 155 | consumer_add_metadata_stream(stream); |
dae10966 | 156 | stream_pipe = ctx->consumer_metadata_pipe; |
ffe60014 | 157 | } else { |
66d583dc | 158 | consumer_add_data_stream(stream); |
dae10966 | 159 | stream_pipe = ctx->consumer_data_pipe; |
ffe60014 DG |
160 | } |
161 | ||
5ab66908 MD |
162 | /* |
163 | * From this point on, the stream's ownership has been moved away from | |
a8086cf4 JR |
164 | * the channel and it becomes globally visible. Hence, remove it from |
165 | * the local stream list to prevent the stream from being both local and | |
166 | * global. | |
5ab66908 MD |
167 | */ |
168 | stream->globally_visible = 1; | |
5c5e3d71 | 169 | cds_list_del_init(&stream->send_node); |
5ab66908 | 170 | |
5c7248cd JG |
171 | ret = lttng_pipe_write(stream_pipe, &stream, sizeof(stream)); /* NOLINT sizeof used on a |
172 | pointer. */ | |
ffe60014 | 173 | if (ret < 0) { |
dae10966 | 174 | ERR("Consumer write %s stream to pipe %d", |
28ab034a JG |
175 | stream->metadata_flag ? "metadata" : "data", |
176 | lttng_pipe_get_writefd(stream_pipe)); | |
5ab66908 MD |
177 | if (stream->metadata_flag) { |
178 | consumer_del_stream_for_metadata(stream); | |
179 | } else { | |
180 | consumer_del_stream_for_data(stream); | |
181 | } | |
a8086cf4 | 182 | goto error; |
ffe60014 | 183 | } |
a8086cf4 | 184 | |
5ab66908 | 185 | error: |
ffe60014 DG |
186 | return ret; |
187 | } | |
188 | ||
28ab034a | 189 | static int get_stream_shm_path(char *stream_shm_path, const char *shm_path, int cpu) |
4628484a | 190 | { |
28ab034a | 191 | char cpu_nr[INT_MAX_STR_LEN]; /* int max len */ |
4628484a MD |
192 | int ret; |
193 | ||
194 | strncpy(stream_shm_path, shm_path, PATH_MAX); | |
195 | stream_shm_path[PATH_MAX - 1] = '\0'; | |
45863397 | 196 | ret = snprintf(cpu_nr, INT_MAX_STR_LEN, "%i", cpu); |
67f8cb8d MD |
197 | if (ret < 0) { |
198 | PERROR("snprintf"); | |
4628484a MD |
199 | goto end; |
200 | } | |
28ab034a | 201 | strncat(stream_shm_path, cpu_nr, PATH_MAX - strlen(stream_shm_path) - 1); |
4628484a MD |
202 | ret = 0; |
203 | end: | |
204 | return ret; | |
205 | } | |
206 | ||
d88aee68 DG |
207 | /* |
208 | * Create streams for the given channel using liblttng-ust-ctl. | |
d2956687 | 209 | * The channel lock must be acquired by the caller. |
d88aee68 DG |
210 | * |
211 | * Return 0 on success else a negative value. | |
212 | */ | |
ffe60014 | 213 | static int create_ust_streams(struct lttng_consumer_channel *channel, |
28ab034a | 214 | struct lttng_consumer_local_data *ctx) |
ffe60014 DG |
215 | { |
216 | int ret, cpu = 0; | |
b623cb6a | 217 | struct lttng_ust_ctl_consumer_stream *ustream; |
ffe60014 | 218 | struct lttng_consumer_stream *stream; |
cd9adb8b | 219 | pthread_mutex_t *current_stream_lock = nullptr; |
ffe60014 | 220 | |
a0377dfe FD |
221 | LTTNG_ASSERT(channel); |
222 | LTTNG_ASSERT(ctx); | |
ffe60014 DG |
223 | |
224 | /* | |
225 | * While a stream is available from ustctl. When NULL is returned, we've | |
226 | * reached the end of the possible stream for the channel. | |
227 | */ | |
b623cb6a | 228 | while ((ustream = lttng_ust_ctl_create_stream(channel->uchan, cpu))) { |
ffe60014 | 229 | int wait_fd; |
04ef1097 | 230 | int ust_metadata_pipe[2]; |
ffe60014 | 231 | |
9ce5646a MD |
232 | health_code_update(); |
233 | ||
04ef1097 MD |
234 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA && channel->monitor) { |
235 | ret = utils_create_pipe_cloexec_nonblock(ust_metadata_pipe); | |
236 | if (ret < 0) { | |
237 | ERR("Create ust metadata poll pipe"); | |
238 | goto error; | |
239 | } | |
240 | wait_fd = ust_metadata_pipe[0]; | |
241 | } else { | |
b623cb6a | 242 | wait_fd = lttng_ust_ctl_stream_get_wait_fd(ustream); |
04ef1097 | 243 | } |
ffe60014 DG |
244 | |
245 | /* Allocate consumer stream object. */ | |
d2956687 | 246 | stream = allocate_stream(cpu, wait_fd, channel, ctx, &ret); |
ffe60014 DG |
247 | if (!stream) { |
248 | goto error_alloc; | |
249 | } | |
250 | stream->ustream = ustream; | |
251 | /* | |
252 | * Store it so we can save multiple function calls afterwards since | |
253 | * this value is used heavily in the stream threads. This is UST | |
254 | * specific so this is why it's done after allocation. | |
255 | */ | |
256 | stream->wait_fd = wait_fd; | |
257 | ||
b31398bb DG |
258 | /* |
259 | * Increment channel refcount since the channel reference has now been | |
260 | * assigned in the allocation process above. | |
261 | */ | |
10a50311 JD |
262 | if (stream->chan->monitor) { |
263 | uatomic_inc(&stream->chan->refcount); | |
264 | } | |
b31398bb | 265 | |
d2956687 JG |
266 | pthread_mutex_lock(&stream->lock); |
267 | current_stream_lock = &stream->lock; | |
ffe60014 DG |
268 | /* |
269 | * Order is important this is why a list is used. On error, the caller | |
270 | * should clean this list. | |
271 | */ | |
272 | cds_list_add_tail(&stream->send_node, &channel->streams.head); | |
273 | ||
28ab034a | 274 | ret = lttng_ust_ctl_get_max_subbuf_size(stream->ustream, &stream->max_sb_size); |
ffe60014 | 275 | if (ret < 0) { |
28ab034a | 276 | ERR("lttng_ust_ctl_get_max_subbuf_size failed for stream %s", stream->name); |
ffe60014 DG |
277 | goto error; |
278 | } | |
279 | ||
280 | /* Do actions once stream has been received. */ | |
281 | if (ctx->on_recv_stream) { | |
282 | ret = ctx->on_recv_stream(stream); | |
283 | if (ret < 0) { | |
284 | goto error; | |
285 | } | |
286 | } | |
287 | ||
d88aee68 | 288 | DBG("UST consumer add stream %s (key: %" PRIu64 ") with relayd id %" PRIu64, |
28ab034a JG |
289 | stream->name, |
290 | stream->key, | |
291 | stream->relayd_stream_id); | |
ffe60014 DG |
292 | |
293 | /* Set next CPU stream. */ | |
294 | channel->streams.count = ++cpu; | |
d88aee68 DG |
295 | |
296 | /* Keep stream reference when creating metadata. */ | |
297 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
298 | channel->metadata_stream = stream; | |
8de4f941 JG |
299 | if (channel->monitor) { |
300 | /* Set metadata poll pipe if we created one */ | |
301 | memcpy(stream->ust_metadata_poll_pipe, | |
28ab034a JG |
302 | ust_metadata_pipe, |
303 | sizeof(ust_metadata_pipe)); | |
8de4f941 | 304 | } |
d88aee68 | 305 | } |
d2956687 | 306 | pthread_mutex_unlock(&stream->lock); |
cd9adb8b | 307 | current_stream_lock = nullptr; |
ffe60014 DG |
308 | } |
309 | ||
310 | return 0; | |
311 | ||
312 | error: | |
313 | error_alloc: | |
d2956687 JG |
314 | if (current_stream_lock) { |
315 | pthread_mutex_unlock(current_stream_lock); | |
316 | } | |
ffe60014 DG |
317 | return ret; |
318 | } | |
319 | ||
28ab034a JG |
320 | static int open_ust_stream_fd(struct lttng_consumer_channel *channel, |
321 | int cpu, | |
322 | const struct lttng_credentials *session_credentials) | |
4628484a MD |
323 | { |
324 | char shm_path[PATH_MAX]; | |
325 | int ret; | |
326 | ||
327 | if (!channel->shm_path[0]) { | |
b7fc068d | 328 | return shm_create_anonymous("ust-consumer"); |
4628484a MD |
329 | } |
330 | ret = get_stream_shm_path(shm_path, channel->shm_path, cpu); | |
331 | if (ret) { | |
332 | goto error_shm_path; | |
333 | } | |
334 | return run_as_open(shm_path, | |
28ab034a JG |
335 | O_RDWR | O_CREAT | O_EXCL, |
336 | S_IRUSR | S_IWUSR, | |
337 | lttng_credentials_get_uid(session_credentials), | |
338 | lttng_credentials_get_gid(session_credentials)); | |
4628484a MD |
339 | |
340 | error_shm_path: | |
341 | return -1; | |
342 | } | |
343 | ||
ffe60014 DG |
344 | /* |
345 | * Create an UST channel with the given attributes and send it to the session | |
346 | * daemon using the ust ctl API. | |
347 | * | |
348 | * Return 0 on success or else a negative value. | |
349 | */ | |
4628484a | 350 | static int create_ust_channel(struct lttng_consumer_channel *channel, |
28ab034a JG |
351 | struct lttng_ust_ctl_consumer_channel_attr *attr, |
352 | struct lttng_ust_ctl_consumer_channel **ust_chanp) | |
ffe60014 | 353 | { |
4628484a MD |
354 | int ret, nr_stream_fds, i, j; |
355 | int *stream_fds; | |
b623cb6a | 356 | struct lttng_ust_ctl_consumer_channel *ust_channel; |
ffe60014 | 357 | |
a0377dfe FD |
358 | LTTNG_ASSERT(channel); |
359 | LTTNG_ASSERT(attr); | |
360 | LTTNG_ASSERT(ust_chanp); | |
361 | LTTNG_ASSERT(channel->buffer_credentials.is_set); | |
ffe60014 DG |
362 | |
363 | DBG3("Creating channel to ustctl with attr: [overwrite: %d, " | |
28ab034a JG |
364 | "subbuf_size: %" PRIu64 ", num_subbuf: %" PRIu64 ", " |
365 | "switch_timer_interval: %u, read_timer_interval: %u, " | |
366 | "output: %d, type: %d", | |
367 | attr->overwrite, | |
368 | attr->subbuf_size, | |
369 | attr->num_subbuf, | |
370 | attr->switch_timer_interval, | |
371 | attr->read_timer_interval, | |
372 | attr->output, | |
373 | attr->type); | |
ffe60014 | 374 | |
4628484a MD |
375 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) |
376 | nr_stream_fds = 1; | |
377 | else | |
b623cb6a | 378 | nr_stream_fds = lttng_ust_ctl_get_nr_stream_per_channel(); |
64803277 | 379 | stream_fds = calloc<int>(nr_stream_fds); |
4628484a MD |
380 | if (!stream_fds) { |
381 | ret = -1; | |
382 | goto error_alloc; | |
383 | } | |
384 | for (i = 0; i < nr_stream_fds; i++) { | |
28ab034a | 385 | stream_fds[i] = open_ust_stream_fd(channel, i, &channel->buffer_credentials.value); |
4628484a MD |
386 | if (stream_fds[i] < 0) { |
387 | ret = -1; | |
388 | goto error_open; | |
389 | } | |
390 | } | |
b623cb6a | 391 | ust_channel = lttng_ust_ctl_create_channel(attr, stream_fds, nr_stream_fds); |
4628484a | 392 | if (!ust_channel) { |
ffe60014 DG |
393 | ret = -1; |
394 | goto error_create; | |
395 | } | |
4628484a MD |
396 | channel->nr_stream_fds = nr_stream_fds; |
397 | channel->stream_fds = stream_fds; | |
398 | *ust_chanp = ust_channel; | |
ffe60014 DG |
399 | |
400 | return 0; | |
401 | ||
402 | error_create: | |
4628484a MD |
403 | error_open: |
404 | for (j = i - 1; j >= 0; j--) { | |
405 | int closeret; | |
406 | ||
407 | closeret = close(stream_fds[j]); | |
408 | if (closeret) { | |
409 | PERROR("close"); | |
410 | } | |
411 | if (channel->shm_path[0]) { | |
412 | char shm_path[PATH_MAX]; | |
413 | ||
28ab034a | 414 | closeret = get_stream_shm_path(shm_path, channel->shm_path, j); |
4628484a MD |
415 | if (closeret) { |
416 | ERR("Cannot get stream shm path"); | |
417 | } | |
418 | closeret = run_as_unlink(shm_path, | |
28ab034a JG |
419 | lttng_credentials_get_uid(LTTNG_OPTIONAL_GET_PTR( |
420 | channel->buffer_credentials)), | |
421 | lttng_credentials_get_gid(LTTNG_OPTIONAL_GET_PTR( | |
422 | channel->buffer_credentials))); | |
4628484a | 423 | if (closeret) { |
4628484a MD |
424 | PERROR("unlink %s", shm_path); |
425 | } | |
426 | } | |
427 | } | |
428 | /* Try to rmdir all directories under shm_path root. */ | |
429 | if (channel->root_shm_path[0]) { | |
602766ec | 430 | (void) run_as_rmdir_recursive(channel->root_shm_path, |
28ab034a JG |
431 | lttng_credentials_get_uid(LTTNG_OPTIONAL_GET_PTR( |
432 | channel->buffer_credentials)), | |
433 | lttng_credentials_get_gid(LTTNG_OPTIONAL_GET_PTR( | |
434 | channel->buffer_credentials)), | |
435 | LTTNG_DIRECTORY_HANDLE_SKIP_NON_EMPTY_FLAG); | |
4628484a MD |
436 | } |
437 | free(stream_fds); | |
438 | error_alloc: | |
ffe60014 DG |
439 | return ret; |
440 | } | |
441 | ||
d88aee68 DG |
442 | /* |
443 | * Send a single given stream to the session daemon using the sock. | |
444 | * | |
445 | * Return 0 on success else a negative value. | |
446 | */ | |
ffe60014 DG |
447 | static int send_sessiond_stream(int sock, struct lttng_consumer_stream *stream) |
448 | { | |
449 | int ret; | |
450 | ||
a0377dfe FD |
451 | LTTNG_ASSERT(stream); |
452 | LTTNG_ASSERT(sock >= 0); | |
ffe60014 | 453 | |
3eb914c0 | 454 | DBG("UST consumer sending stream %" PRIu64 " to sessiond", stream->key); |
ffe60014 DG |
455 | |
456 | /* Send stream to session daemon. */ | |
b623cb6a | 457 | ret = lttng_ust_ctl_send_stream_to_sessiond(sock, stream->ustream); |
ffe60014 DG |
458 | if (ret < 0) { |
459 | goto error; | |
460 | } | |
461 | ||
ffe60014 DG |
462 | error: |
463 | return ret; | |
464 | } | |
465 | ||
466 | /* | |
a3a86f35 | 467 | * Send channel to sessiond and relayd if applicable. |
ffe60014 | 468 | * |
d88aee68 | 469 | * Return 0 on success or else a negative value. |
ffe60014 | 470 | */ |
a3a86f35 | 471 | static int send_channel_to_sessiond_and_relayd(int sock, |
28ab034a JG |
472 | struct lttng_consumer_channel *channel, |
473 | struct lttng_consumer_local_data *ctx, | |
474 | int *relayd_error) | |
ffe60014 | 475 | { |
0c759fc9 | 476 | int ret, ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
ffe60014 | 477 | struct lttng_consumer_stream *stream; |
a4baae1b | 478 | uint64_t net_seq_idx = -1ULL; |
ffe60014 | 479 | |
a0377dfe FD |
480 | LTTNG_ASSERT(channel); |
481 | LTTNG_ASSERT(ctx); | |
482 | LTTNG_ASSERT(sock >= 0); | |
ffe60014 DG |
483 | |
484 | DBG("UST consumer sending channel %s to sessiond", channel->name); | |
485 | ||
62285ea4 | 486 | if (channel->relayd_id != (uint64_t) -1ULL) { |
28ab034a | 487 | cds_list_for_each_entry (stream, &channel->streams.head, send_node) { |
9ce5646a MD |
488 | health_code_update(); |
489 | ||
62285ea4 | 490 | /* Try to send the stream to the relayd if one is available. */ |
a3a86f35 | 491 | DBG("Sending stream %" PRIu64 " of channel \"%s\" to relayd", |
28ab034a JG |
492 | stream->key, |
493 | channel->name); | |
62285ea4 DG |
494 | ret = consumer_send_relayd_stream(stream, stream->chan->pathname); |
495 | if (ret < 0) { | |
496 | /* | |
497 | * Flag that the relayd was the problem here probably due to a | |
498 | * communicaton error on the socket. | |
499 | */ | |
500 | if (relayd_error) { | |
501 | *relayd_error = 1; | |
502 | } | |
725d28b2 | 503 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
ffe60014 | 504 | } |
a4baae1b JD |
505 | if (net_seq_idx == -1ULL) { |
506 | net_seq_idx = stream->net_seq_idx; | |
507 | } | |
508 | } | |
f2a444f1 | 509 | } |
ffe60014 | 510 | |
f2a444f1 DG |
511 | /* Inform sessiond that we are about to send channel and streams. */ |
512 | ret = consumer_send_status_msg(sock, ret_code); | |
0c759fc9 | 513 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
f2a444f1 DG |
514 | /* |
515 | * Either the session daemon is not responding or the relayd died so we | |
516 | * stop now. | |
517 | */ | |
518 | goto error; | |
519 | } | |
520 | ||
521 | /* Send channel to sessiond. */ | |
b623cb6a | 522 | ret = lttng_ust_ctl_send_channel_to_sessiond(sock, channel->uchan); |
f2a444f1 DG |
523 | if (ret < 0) { |
524 | goto error; | |
525 | } | |
526 | ||
b623cb6a | 527 | ret = lttng_ust_ctl_channel_close_wakeup_fd(channel->uchan); |
f2a444f1 DG |
528 | if (ret < 0) { |
529 | goto error; | |
530 | } | |
531 | ||
532 | /* The channel was sent successfully to the sessiond at this point. */ | |
28ab034a | 533 | cds_list_for_each_entry (stream, &channel->streams.head, send_node) { |
9ce5646a MD |
534 | health_code_update(); |
535 | ||
ffe60014 DG |
536 | /* Send stream to session daemon. */ |
537 | ret = send_sessiond_stream(sock, stream); | |
538 | if (ret < 0) { | |
539 | goto error; | |
540 | } | |
541 | } | |
542 | ||
543 | /* Tell sessiond there is no more stream. */ | |
cd9adb8b | 544 | ret = lttng_ust_ctl_send_stream_to_sessiond(sock, nullptr); |
ffe60014 DG |
545 | if (ret < 0) { |
546 | goto error; | |
547 | } | |
548 | ||
549 | DBG("UST consumer NULL stream sent to sessiond"); | |
550 | ||
551 | return 0; | |
552 | ||
553 | error: | |
0c759fc9 | 554 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
f2a444f1 DG |
555 | ret = -1; |
556 | } | |
ffe60014 DG |
557 | return ret; |
558 | } | |
559 | ||
560 | /* | |
561 | * Creates a channel and streams and add the channel it to the channel internal | |
562 | * state. The created stream must ONLY be sent once the GET_CHANNEL command is | |
563 | * received. | |
564 | * | |
565 | * Return 0 on success or else, a negative value is returned and the channel | |
566 | * MUST be destroyed by consumer_del_channel(). | |
567 | */ | |
75cfe9e6 | 568 | static int ask_channel(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
569 | struct lttng_consumer_channel *channel, |
570 | struct lttng_ust_ctl_consumer_channel_attr *attr) | |
3bd1e081 MD |
571 | { |
572 | int ret; | |
573 | ||
a0377dfe FD |
574 | LTTNG_ASSERT(ctx); |
575 | LTTNG_ASSERT(channel); | |
576 | LTTNG_ASSERT(attr); | |
ffe60014 DG |
577 | |
578 | /* | |
579 | * This value is still used by the kernel consumer since for the kernel, | |
580 | * the stream ownership is not IN the consumer so we need to have the | |
581 | * number of left stream that needs to be initialized so we can know when | |
582 | * to delete the channel (see consumer.c). | |
583 | * | |
584 | * As for the user space tracer now, the consumer creates and sends the | |
585 | * stream to the session daemon which only sends them to the application | |
586 | * once every stream of a channel is received making this value useless | |
587 | * because we they will be added to the poll thread before the application | |
588 | * receives them. This ensures that a stream can not hang up during | |
589 | * initilization of a channel. | |
590 | */ | |
591 | channel->nb_init_stream_left = 0; | |
592 | ||
593 | /* The reply msg status is handled in the following call. */ | |
4628484a | 594 | ret = create_ust_channel(channel, attr, &channel->uchan); |
ffe60014 | 595 | if (ret < 0) { |
10a50311 | 596 | goto end; |
3bd1e081 MD |
597 | } |
598 | ||
b623cb6a | 599 | channel->wait_fd = lttng_ust_ctl_channel_get_wait_fd(channel->uchan); |
d8ef542d | 600 | |
10a50311 JD |
601 | /* |
602 | * For the snapshots (no monitor), we create the metadata streams | |
603 | * on demand, not during the channel creation. | |
604 | */ | |
605 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA && !channel->monitor) { | |
606 | ret = 0; | |
607 | goto end; | |
608 | } | |
609 | ||
ffe60014 | 610 | /* Open all streams for this channel. */ |
d2956687 JG |
611 | pthread_mutex_lock(&channel->lock); |
612 | ret = create_ust_streams(channel, ctx); | |
613 | pthread_mutex_unlock(&channel->lock); | |
ffe60014 | 614 | if (ret < 0) { |
10a50311 | 615 | goto end; |
ffe60014 DG |
616 | } |
617 | ||
10a50311 | 618 | end: |
3bd1e081 MD |
619 | return ret; |
620 | } | |
621 | ||
d88aee68 DG |
622 | /* |
623 | * Send all stream of a channel to the right thread handling it. | |
624 | * | |
625 | * On error, return a negative value else 0 on success. | |
626 | */ | |
627 | static int send_streams_to_thread(struct lttng_consumer_channel *channel, | |
28ab034a | 628 | struct lttng_consumer_local_data *ctx) |
d88aee68 DG |
629 | { |
630 | int ret = 0; | |
631 | struct lttng_consumer_stream *stream, *stmp; | |
632 | ||
a0377dfe FD |
633 | LTTNG_ASSERT(channel); |
634 | LTTNG_ASSERT(ctx); | |
d88aee68 DG |
635 | |
636 | /* Send streams to the corresponding thread. */ | |
28ab034a | 637 | cds_list_for_each_entry_safe (stream, stmp, &channel->streams.head, send_node) { |
9ce5646a MD |
638 | health_code_update(); |
639 | ||
d88aee68 DG |
640 | /* Sending the stream to the thread. */ |
641 | ret = send_stream_to_thread(stream, ctx); | |
642 | if (ret < 0) { | |
643 | /* | |
644 | * If we are unable to send the stream to the thread, there is | |
645 | * a big problem so just stop everything. | |
646 | */ | |
647 | goto error; | |
648 | } | |
d88aee68 DG |
649 | } |
650 | ||
651 | error: | |
652 | return ret; | |
653 | } | |
654 | ||
7972aab2 DG |
655 | /* |
656 | * Flush channel's streams using the given key to retrieve the channel. | |
657 | * | |
658 | * Return 0 on success else an LTTng error code. | |
659 | */ | |
660 | static int flush_channel(uint64_t chan_key) | |
661 | { | |
662 | int ret = 0; | |
663 | struct lttng_consumer_channel *channel; | |
664 | struct lttng_consumer_stream *stream; | |
665 | struct lttng_ht *ht; | |
666 | struct lttng_ht_iter iter; | |
667 | ||
8fd623e0 | 668 | DBG("UST consumer flush channel key %" PRIu64, chan_key); |
7972aab2 | 669 | |
56047f5a | 670 | lttng::urcu::read_lock_guard read_lock; |
7972aab2 DG |
671 | channel = consumer_find_channel(chan_key); |
672 | if (!channel) { | |
8fd623e0 | 673 | ERR("UST consumer flush channel %" PRIu64 " not found", chan_key); |
7972aab2 DG |
674 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
675 | goto error; | |
676 | } | |
677 | ||
fa29bfbf | 678 | ht = the_consumer_data.stream_per_chan_id_ht; |
7972aab2 DG |
679 | |
680 | /* For each stream of the channel id, flush it. */ | |
7972aab2 | 681 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
682 | ht->hash_fct(&channel->key, lttng_ht_seed), |
683 | ht->match_fct, | |
684 | &channel->key, | |
685 | &iter.iter, | |
686 | stream, | |
687 | node_channel_id.node) | |
688 | { | |
9ce5646a MD |
689 | health_code_update(); |
690 | ||
0dd01979 | 691 | pthread_mutex_lock(&stream->lock); |
5cfcab67 JR |
692 | |
693 | /* | |
694 | * Protect against concurrent teardown of a stream. | |
695 | */ | |
696 | if (cds_lfht_is_node_deleted(&stream->node.node)) { | |
697 | goto next; | |
698 | } | |
699 | ||
0dd01979 | 700 | if (!stream->quiescent) { |
881fc67f MD |
701 | ret = lttng_ust_ctl_flush_buffer(stream->ustream, 0); |
702 | if (ret) { | |
28ab034a JG |
703 | ERR("Failed to flush buffer while flushing channel: channel key = %" PRIu64 |
704 | ", channel name = '%s'", | |
705 | chan_key, | |
706 | channel->name); | |
881fc67f MD |
707 | ret = LTTNG_ERR_BUFFER_FLUSH_FAILED; |
708 | pthread_mutex_unlock(&stream->lock); | |
709 | goto error; | |
710 | } | |
0dd01979 MD |
711 | stream->quiescent = true; |
712 | } | |
28ab034a | 713 | next: |
0dd01979 MD |
714 | pthread_mutex_unlock(&stream->lock); |
715 | } | |
9cc4ae91 JG |
716 | |
717 | /* | |
718 | * Send one last buffer statistics update to the session daemon. This | |
719 | * ensures that the session daemon gets at least one statistics update | |
720 | * per channel even in the case of short-lived channels, such as when a | |
721 | * short-lived app is traced in per-pid mode. | |
722 | */ | |
723 | sample_and_send_channel_buffer_stats(channel); | |
0dd01979 | 724 | error: |
0dd01979 MD |
725 | return ret; |
726 | } | |
727 | ||
728 | /* | |
729 | * Clear quiescent state from channel's streams using the given key to | |
730 | * retrieve the channel. | |
731 | * | |
732 | * Return 0 on success else an LTTng error code. | |
733 | */ | |
734 | static int clear_quiescent_channel(uint64_t chan_key) | |
735 | { | |
736 | int ret = 0; | |
737 | struct lttng_consumer_channel *channel; | |
738 | struct lttng_consumer_stream *stream; | |
739 | struct lttng_ht *ht; | |
740 | struct lttng_ht_iter iter; | |
741 | ||
742 | DBG("UST consumer clear quiescent channel key %" PRIu64, chan_key); | |
743 | ||
56047f5a | 744 | lttng::urcu::read_lock_guard read_lock; |
0dd01979 MD |
745 | channel = consumer_find_channel(chan_key); |
746 | if (!channel) { | |
747 | ERR("UST consumer clear quiescent channel %" PRIu64 " not found", chan_key); | |
748 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
749 | goto error; | |
750 | } | |
751 | ||
fa29bfbf | 752 | ht = the_consumer_data.stream_per_chan_id_ht; |
0dd01979 MD |
753 | |
754 | /* For each stream of the channel id, clear quiescent state. */ | |
755 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
28ab034a JG |
756 | ht->hash_fct(&channel->key, lttng_ht_seed), |
757 | ht->match_fct, | |
758 | &channel->key, | |
759 | &iter.iter, | |
760 | stream, | |
761 | node_channel_id.node) | |
762 | { | |
0dd01979 MD |
763 | health_code_update(); |
764 | ||
765 | pthread_mutex_lock(&stream->lock); | |
766 | stream->quiescent = false; | |
767 | pthread_mutex_unlock(&stream->lock); | |
7972aab2 | 768 | } |
7972aab2 DG |
769 | error: |
770 | return ret; | |
771 | } | |
772 | ||
d88aee68 DG |
773 | /* |
774 | * Close metadata stream wakeup_fd using the given key to retrieve the channel. | |
775 | * | |
776 | * Return 0 on success else an LTTng error code. | |
777 | */ | |
778 | static int close_metadata(uint64_t chan_key) | |
779 | { | |
ea88ca2a | 780 | int ret = 0; |
d88aee68 | 781 | struct lttng_consumer_channel *channel; |
f65a74be | 782 | unsigned int channel_monitor; |
d88aee68 | 783 | |
8fd623e0 | 784 | DBG("UST consumer close metadata key %" PRIu64, chan_key); |
d88aee68 DG |
785 | |
786 | channel = consumer_find_channel(chan_key); | |
787 | if (!channel) { | |
84cc9aa0 DG |
788 | /* |
789 | * This is possible if the metadata thread has issue a delete because | |
790 | * the endpoint point of the stream hung up. There is no way the | |
791 | * session daemon can know about it thus use a DBG instead of an actual | |
792 | * error. | |
793 | */ | |
794 | DBG("UST consumer close metadata %" PRIu64 " not found", chan_key); | |
d88aee68 DG |
795 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
796 | goto error; | |
797 | } | |
798 | ||
fa29bfbf | 799 | pthread_mutex_lock(&the_consumer_data.lock); |
a9838785 | 800 | pthread_mutex_lock(&channel->lock); |
f65a74be | 801 | channel_monitor = channel->monitor; |
73811ecc DG |
802 | if (cds_lfht_is_node_deleted(&channel->node.node)) { |
803 | goto error_unlock; | |
804 | } | |
805 | ||
6d574024 | 806 | lttng_ustconsumer_close_metadata(channel); |
f65a74be | 807 | pthread_mutex_unlock(&channel->lock); |
fa29bfbf | 808 | pthread_mutex_unlock(&the_consumer_data.lock); |
d88aee68 | 809 | |
f65a74be JG |
810 | /* |
811 | * The ownership of a metadata channel depends on the type of | |
812 | * session to which it belongs. In effect, the monitor flag is checked | |
813 | * to determine if this metadata channel is in "snapshot" mode or not. | |
814 | * | |
815 | * In the non-snapshot case, the metadata channel is created along with | |
816 | * a single stream which will remain present until the metadata channel | |
817 | * is destroyed (on the destruction of its session). In this case, the | |
818 | * metadata stream in "monitored" by the metadata poll thread and holds | |
819 | * the ownership of its channel. | |
820 | * | |
821 | * Closing the metadata will cause the metadata stream's "metadata poll | |
822 | * pipe" to be closed. Closing this pipe will wake-up the metadata poll | |
823 | * thread which will teardown the metadata stream which, in return, | |
824 | * deletes the metadata channel. | |
825 | * | |
826 | * In the snapshot case, the metadata stream is created and destroyed | |
827 | * on every snapshot record. Since the channel doesn't have an owner | |
828 | * other than the session daemon, it is safe to destroy it immediately | |
829 | * on reception of the CLOSE_METADATA command. | |
830 | */ | |
831 | if (!channel_monitor) { | |
832 | /* | |
833 | * The channel and consumer_data locks must be | |
834 | * released before this call since consumer_del_channel | |
835 | * re-acquires the channel and consumer_data locks to teardown | |
836 | * the channel and queue its reclamation by the "call_rcu" | |
837 | * worker thread. | |
838 | */ | |
839 | consumer_del_channel(channel); | |
840 | } | |
841 | ||
842 | return ret; | |
ea88ca2a | 843 | error_unlock: |
a9838785 | 844 | pthread_mutex_unlock(&channel->lock); |
fa29bfbf | 845 | pthread_mutex_unlock(&the_consumer_data.lock); |
d88aee68 DG |
846 | error: |
847 | return ret; | |
848 | } | |
849 | ||
850 | /* | |
851 | * RCU read side lock MUST be acquired before calling this function. | |
852 | * | |
853 | * Return 0 on success else an LTTng error code. | |
854 | */ | |
855 | static int setup_metadata(struct lttng_consumer_local_data *ctx, uint64_t key) | |
856 | { | |
857 | int ret; | |
858 | struct lttng_consumer_channel *metadata; | |
859 | ||
48b7cdc2 FD |
860 | ASSERT_RCU_READ_LOCKED(); |
861 | ||
8fd623e0 | 862 | DBG("UST consumer setup metadata key %" PRIu64, key); |
d88aee68 DG |
863 | |
864 | metadata = consumer_find_channel(key); | |
865 | if (!metadata) { | |
866 | ERR("UST consumer push metadata %" PRIu64 " not found", key); | |
867 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
10a50311 JD |
868 | goto end; |
869 | } | |
870 | ||
871 | /* | |
872 | * In no monitor mode, the metadata channel has no stream(s) so skip the | |
873 | * ownership transfer to the metadata thread. | |
874 | */ | |
875 | if (!metadata->monitor) { | |
876 | DBG("Metadata channel in no monitor"); | |
877 | ret = 0; | |
878 | goto end; | |
d88aee68 DG |
879 | } |
880 | ||
881 | /* | |
882 | * Send metadata stream to relayd if one available. Availability is | |
883 | * known if the stream is still in the list of the channel. | |
884 | */ | |
885 | if (cds_list_empty(&metadata->streams.head)) { | |
886 | ERR("Metadata channel key %" PRIu64 ", no stream available.", key); | |
887 | ret = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
f5a0c9cf | 888 | goto error_no_stream; |
d88aee68 DG |
889 | } |
890 | ||
891 | /* Send metadata stream to relayd if needed. */ | |
62285ea4 | 892 | if (metadata->metadata_stream->net_seq_idx != (uint64_t) -1ULL) { |
28ab034a | 893 | ret = consumer_send_relayd_stream(metadata->metadata_stream, metadata->pathname); |
62285ea4 DG |
894 | if (ret < 0) { |
895 | ret = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
896 | goto error; | |
897 | } | |
28ab034a | 898 | ret = consumer_send_relayd_streams_sent(metadata->metadata_stream->net_seq_idx); |
601262d6 JD |
899 | if (ret < 0) { |
900 | ret = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
901 | goto error; | |
902 | } | |
d88aee68 DG |
903 | } |
904 | ||
a8086cf4 JR |
905 | /* |
906 | * Ownership of metadata stream is passed along. Freeing is handled by | |
907 | * the callee. | |
908 | */ | |
d88aee68 DG |
909 | ret = send_streams_to_thread(metadata, ctx); |
910 | if (ret < 0) { | |
911 | /* | |
912 | * If we are unable to send the stream to the thread, there is | |
913 | * a big problem so just stop everything. | |
914 | */ | |
915 | ret = LTTCOMM_CONSUMERD_FATAL; | |
a8086cf4 | 916 | goto send_streams_error; |
d88aee68 DG |
917 | } |
918 | /* List MUST be empty after or else it could be reused. */ | |
a0377dfe | 919 | LTTNG_ASSERT(cds_list_empty(&metadata->streams.head)); |
d88aee68 | 920 | |
10a50311 JD |
921 | ret = 0; |
922 | goto end; | |
d88aee68 DG |
923 | |
924 | error: | |
f2a444f1 DG |
925 | /* |
926 | * Delete metadata channel on error. At this point, the metadata stream can | |
927 | * NOT be monitored by the metadata thread thus having the guarantee that | |
928 | * the stream is still in the local stream list of the channel. This call | |
929 | * will make sure to clean that list. | |
930 | */ | |
cd9adb8b JG |
931 | consumer_stream_destroy(metadata->metadata_stream, nullptr); |
932 | metadata->metadata_stream = nullptr; | |
f40b76ae JG |
933 | lttng_wait_queue_wake_all(&metadata->metadata_pushed_wait_queue); |
934 | ||
a8086cf4 | 935 | send_streams_error: |
f5a0c9cf | 936 | error_no_stream: |
10a50311 JD |
937 | end: |
938 | return ret; | |
939 | } | |
940 | ||
941 | /* | |
942 | * Snapshot the whole metadata. | |
d2956687 | 943 | * RCU read-side lock must be held by the caller. |
10a50311 JD |
944 | * |
945 | * Returns 0 on success, < 0 on error | |
946 | */ | |
3eb928aa | 947 | static int snapshot_metadata(struct lttng_consumer_channel *metadata_channel, |
28ab034a JG |
948 | uint64_t key, |
949 | char *path, | |
950 | uint64_t relayd_id, | |
951 | struct lttng_consumer_local_data *ctx) | |
10a50311 JD |
952 | { |
953 | int ret = 0; | |
10a50311 JD |
954 | struct lttng_consumer_stream *metadata_stream; |
955 | ||
a0377dfe FD |
956 | LTTNG_ASSERT(path); |
957 | LTTNG_ASSERT(ctx); | |
48b7cdc2 | 958 | ASSERT_RCU_READ_LOCKED(); |
10a50311 | 959 | |
28ab034a | 960 | DBG("UST consumer snapshot metadata with key %" PRIu64 " at path %s", key, path); |
10a50311 | 961 | |
56047f5a | 962 | lttng::urcu::read_lock_guard read_lock; |
10a50311 | 963 | |
a0377dfe | 964 | LTTNG_ASSERT(!metadata_channel->monitor); |
10a50311 | 965 | |
9ce5646a MD |
966 | health_code_update(); |
967 | ||
10a50311 JD |
968 | /* |
969 | * Ask the sessiond if we have new metadata waiting and update the | |
970 | * consumer metadata cache. | |
971 | */ | |
f40b76ae | 972 | ret = lttng_ustconsumer_request_metadata(ctx, metadata_channel, false, 1); |
10a50311 JD |
973 | if (ret < 0) { |
974 | goto error; | |
975 | } | |
976 | ||
9ce5646a MD |
977 | health_code_update(); |
978 | ||
10a50311 JD |
979 | /* |
980 | * The metadata stream is NOT created in no monitor mode when the channel | |
981 | * is created on a sessiond ask channel command. | |
982 | */ | |
d2956687 | 983 | ret = create_ust_streams(metadata_channel, ctx); |
10a50311 JD |
984 | if (ret < 0) { |
985 | goto error; | |
986 | } | |
987 | ||
988 | metadata_stream = metadata_channel->metadata_stream; | |
a0377dfe | 989 | LTTNG_ASSERT(metadata_stream); |
10a50311 | 990 | |
947bd097 | 991 | metadata_stream->read_subbuffer_ops.lock(metadata_stream); |
10a50311 JD |
992 | if (relayd_id != (uint64_t) -1ULL) { |
993 | metadata_stream->net_seq_idx = relayd_id; | |
994 | ret = consumer_send_relayd_stream(metadata_stream, path); | |
10a50311 | 995 | } else { |
28ab034a | 996 | ret = consumer_stream_create_output_files(metadata_stream, false); |
d2956687 | 997 | } |
d2956687 JG |
998 | if (ret < 0) { |
999 | goto error_stream; | |
10a50311 JD |
1000 | } |
1001 | ||
04ef1097 | 1002 | do { |
9ce5646a | 1003 | health_code_update(); |
6f9449c2 | 1004 | ret = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
10a50311 | 1005 | if (ret < 0) { |
94d49140 | 1006 | goto error_stream; |
10a50311 | 1007 | } |
04ef1097 | 1008 | } while (ret > 0); |
10a50311 | 1009 | |
10a50311 | 1010 | error_stream: |
947bd097 | 1011 | metadata_stream->read_subbuffer_ops.unlock(metadata_stream); |
10a50311 | 1012 | /* |
947bd097 JR |
1013 | * Clean up the stream completely because the next snapshot will use a |
1014 | * new metadata stream. | |
10a50311 | 1015 | */ |
cd9adb8b JG |
1016 | consumer_stream_destroy(metadata_stream, nullptr); |
1017 | metadata_channel->metadata_stream = nullptr; | |
f40b76ae | 1018 | lttng_wait_queue_wake_all(&metadata_channel->metadata_pushed_wait_queue); |
10a50311 JD |
1019 | |
1020 | error: | |
10a50311 JD |
1021 | return ret; |
1022 | } | |
1023 | ||
28ab034a | 1024 | static int get_current_subbuf_addr(struct lttng_consumer_stream *stream, const char **addr) |
128708c3 JG |
1025 | { |
1026 | int ret; | |
1027 | unsigned long mmap_offset; | |
1028 | const char *mmap_base; | |
1029 | ||
97535efa | 1030 | mmap_base = (const char *) lttng_ust_ctl_get_mmap_base(stream->ustream); |
128708c3 | 1031 | if (!mmap_base) { |
28ab034a | 1032 | ERR("Failed to get mmap base for stream `%s`", stream->name); |
128708c3 JG |
1033 | ret = -EPERM; |
1034 | goto error; | |
1035 | } | |
1036 | ||
b623cb6a | 1037 | ret = lttng_ust_ctl_get_mmap_read_offset(stream->ustream, &mmap_offset); |
128708c3 JG |
1038 | if (ret != 0) { |
1039 | ERR("Failed to get mmap offset for stream `%s`", stream->name); | |
1040 | ret = -EINVAL; | |
1041 | goto error; | |
1042 | } | |
1043 | ||
1044 | *addr = mmap_base + mmap_offset; | |
1045 | error: | |
1046 | return ret; | |
128708c3 JG |
1047 | } |
1048 | ||
10a50311 JD |
1049 | /* |
1050 | * Take a snapshot of all the stream of a channel. | |
d2956687 | 1051 | * RCU read-side lock and the channel lock must be held by the caller. |
10a50311 JD |
1052 | * |
1053 | * Returns 0 on success, < 0 on error | |
1054 | */ | |
3eb928aa | 1055 | static int snapshot_channel(struct lttng_consumer_channel *channel, |
28ab034a JG |
1056 | uint64_t key, |
1057 | char *path, | |
1058 | uint64_t relayd_id, | |
1059 | uint64_t nb_packets_per_stream, | |
1060 | struct lttng_consumer_local_data *ctx) | |
10a50311 JD |
1061 | { |
1062 | int ret; | |
1063 | unsigned use_relayd = 0; | |
1064 | unsigned long consumed_pos, produced_pos; | |
10a50311 JD |
1065 | struct lttng_consumer_stream *stream; |
1066 | ||
a0377dfe FD |
1067 | LTTNG_ASSERT(path); |
1068 | LTTNG_ASSERT(ctx); | |
48b7cdc2 | 1069 | ASSERT_RCU_READ_LOCKED(); |
10a50311 | 1070 | |
56047f5a | 1071 | lttng::urcu::read_lock_guard read_lock; |
10a50311 JD |
1072 | |
1073 | if (relayd_id != (uint64_t) -1ULL) { | |
1074 | use_relayd = 1; | |
1075 | } | |
1076 | ||
a0377dfe | 1077 | LTTNG_ASSERT(!channel->monitor); |
6a00837f | 1078 | DBG("UST consumer snapshot channel %" PRIu64, key); |
10a50311 | 1079 | |
28ab034a | 1080 | cds_list_for_each_entry (stream, &channel->streams.head, send_node) { |
9ce5646a MD |
1081 | health_code_update(); |
1082 | ||
10a50311 JD |
1083 | /* Lock stream because we are about to change its state. */ |
1084 | pthread_mutex_lock(&stream->lock); | |
a0377dfe | 1085 | LTTNG_ASSERT(channel->trace_chunk); |
d2956687 JG |
1086 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { |
1087 | /* | |
1088 | * Can't happen barring an internal error as the channel | |
1089 | * holds a reference to the trace chunk. | |
1090 | */ | |
1091 | ERR("Failed to acquire reference to channel's trace chunk"); | |
1092 | ret = -1; | |
1093 | goto error_unlock; | |
1094 | } | |
a0377dfe | 1095 | LTTNG_ASSERT(!stream->trace_chunk); |
d2956687 JG |
1096 | stream->trace_chunk = channel->trace_chunk; |
1097 | ||
10a50311 JD |
1098 | stream->net_seq_idx = relayd_id; |
1099 | ||
1100 | if (use_relayd) { | |
1101 | ret = consumer_send_relayd_stream(stream, path); | |
1102 | if (ret < 0) { | |
a4beac76 | 1103 | goto error_close_stream; |
10a50311 JD |
1104 | } |
1105 | } else { | |
28ab034a | 1106 | ret = consumer_stream_create_output_files(stream, false); |
10a50311 | 1107 | if (ret < 0) { |
a4beac76 | 1108 | goto error_close_stream; |
10a50311 | 1109 | } |
28ab034a | 1110 | DBG("UST consumer snapshot stream (%" PRIu64 ")", stream->key); |
10a50311 JD |
1111 | } |
1112 | ||
d4d80f77 MD |
1113 | /* |
1114 | * If tracing is active, we want to perform a "full" buffer flush. | |
1115 | * Else, if quiescent, it has already been done by the prior stop. | |
1116 | */ | |
1117 | if (!stream->quiescent) { | |
881fc67f MD |
1118 | ret = lttng_ust_ctl_flush_buffer(stream->ustream, 0); |
1119 | if (ret < 0) { | |
28ab034a JG |
1120 | ERR("Failed to flush buffer during snapshot of channel: channel key = %" PRIu64 |
1121 | ", channel name = '%s'", | |
1122 | channel->key, | |
1123 | channel->name); | |
881fc67f MD |
1124 | goto error_unlock; |
1125 | } | |
d4d80f77 | 1126 | } |
10a50311 JD |
1127 | |
1128 | ret = lttng_ustconsumer_take_snapshot(stream); | |
1129 | if (ret < 0) { | |
1130 | ERR("Taking UST snapshot"); | |
a4beac76 | 1131 | goto error_close_stream; |
10a50311 JD |
1132 | } |
1133 | ||
1134 | ret = lttng_ustconsumer_get_produced_snapshot(stream, &produced_pos); | |
1135 | if (ret < 0) { | |
1136 | ERR("Produced UST snapshot position"); | |
a4beac76 | 1137 | goto error_close_stream; |
10a50311 JD |
1138 | } |
1139 | ||
1140 | ret = lttng_ustconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
1141 | if (ret < 0) { | |
1142 | ERR("Consumerd UST snapshot position"); | |
a4beac76 | 1143 | goto error_close_stream; |
10a50311 JD |
1144 | } |
1145 | ||
5c786ded JD |
1146 | /* |
1147 | * The original value is sent back if max stream size is larger than | |
d07ceecd | 1148 | * the possible size of the snapshot. Also, we assume that the session |
5c786ded JD |
1149 | * daemon should never send a maximum stream size that is lower than |
1150 | * subbuffer size. | |
1151 | */ | |
28ab034a JG |
1152 | consumed_pos = consumer_get_consume_start_pos( |
1153 | consumed_pos, produced_pos, nb_packets_per_stream, stream->max_sb_size); | |
5c786ded | 1154 | |
9377d830 | 1155 | while ((long) (consumed_pos - produced_pos) < 0) { |
10a50311 JD |
1156 | ssize_t read_len; |
1157 | unsigned long len, padded_len; | |
128708c3 | 1158 | const char *subbuf_addr; |
fd424d99 | 1159 | struct lttng_buffer_view subbuf_view; |
10a50311 | 1160 | |
9ce5646a MD |
1161 | health_code_update(); |
1162 | ||
10a50311 JD |
1163 | DBG("UST consumer taking snapshot at pos %lu", consumed_pos); |
1164 | ||
b623cb6a | 1165 | ret = lttng_ust_ctl_get_subbuf(stream->ustream, &consumed_pos); |
10a50311 JD |
1166 | if (ret < 0) { |
1167 | if (ret != -EAGAIN) { | |
b623cb6a | 1168 | PERROR("lttng_ust_ctl_get_subbuf snapshot"); |
10a50311 JD |
1169 | goto error_close_stream; |
1170 | } | |
1171 | DBG("UST consumer get subbuf failed. Skipping it."); | |
1172 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 1173 | stream->chan->lost_packets++; |
10a50311 JD |
1174 | continue; |
1175 | } | |
1176 | ||
b623cb6a | 1177 | ret = lttng_ust_ctl_get_subbuf_size(stream->ustream, &len); |
10a50311 | 1178 | if (ret < 0) { |
b623cb6a | 1179 | ERR("Snapshot lttng_ust_ctl_get_subbuf_size"); |
10a50311 JD |
1180 | goto error_put_subbuf; |
1181 | } | |
1182 | ||
b623cb6a | 1183 | ret = lttng_ust_ctl_get_padded_subbuf_size(stream->ustream, &padded_len); |
10a50311 | 1184 | if (ret < 0) { |
b623cb6a | 1185 | ERR("Snapshot lttng_ust_ctl_get_padded_subbuf_size"); |
10a50311 JD |
1186 | goto error_put_subbuf; |
1187 | } | |
1188 | ||
128708c3 JG |
1189 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
1190 | if (ret) { | |
1191 | goto error_put_subbuf; | |
1192 | } | |
1193 | ||
28ab034a | 1194 | subbuf_view = lttng_buffer_view_init(subbuf_addr, 0, padded_len); |
f5ba75b4 | 1195 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
28ab034a | 1196 | stream, &subbuf_view, padded_len - len); |
10a50311 JD |
1197 | if (use_relayd) { |
1198 | if (read_len != len) { | |
56591bac | 1199 | ret = -EPERM; |
10a50311 JD |
1200 | goto error_put_subbuf; |
1201 | } | |
1202 | } else { | |
1203 | if (read_len != padded_len) { | |
56591bac | 1204 | ret = -EPERM; |
10a50311 JD |
1205 | goto error_put_subbuf; |
1206 | } | |
1207 | } | |
1208 | ||
b623cb6a | 1209 | ret = lttng_ust_ctl_put_subbuf(stream->ustream); |
10a50311 | 1210 | if (ret < 0) { |
b623cb6a | 1211 | ERR("Snapshot lttng_ust_ctl_put_subbuf"); |
10a50311 JD |
1212 | goto error_close_stream; |
1213 | } | |
1214 | consumed_pos += stream->max_sb_size; | |
1215 | } | |
1216 | ||
1217 | /* Simply close the stream so we can use it on the next snapshot. */ | |
d119bd01 | 1218 | consumer_stream_close_output(stream); |
10a50311 JD |
1219 | pthread_mutex_unlock(&stream->lock); |
1220 | } | |
1221 | ||
10a50311 JD |
1222 | return 0; |
1223 | ||
1224 | error_put_subbuf: | |
b623cb6a MJ |
1225 | if (lttng_ust_ctl_put_subbuf(stream->ustream) < 0) { |
1226 | ERR("Snapshot lttng_ust_ctl_put_subbuf"); | |
10a50311 JD |
1227 | } |
1228 | error_close_stream: | |
d119bd01 | 1229 | consumer_stream_close_output(stream); |
10a50311 JD |
1230 | error_unlock: |
1231 | pthread_mutex_unlock(&stream->lock); | |
d88aee68 DG |
1232 | return ret; |
1233 | } | |
1234 | ||
28ab034a | 1235 | static void metadata_stream_reset_cache_consumed_position(struct lttng_consumer_stream *stream) |
b1316da1 JG |
1236 | { |
1237 | ASSERT_LOCKED(stream->lock); | |
1238 | ||
28ab034a | 1239 | DBG("Reset metadata cache of session %" PRIu64, stream->chan->session_id); |
b1316da1 JG |
1240 | stream->ust_metadata_pushed = 0; |
1241 | } | |
1242 | ||
331744e3 | 1243 | /* |
c585821b MD |
1244 | * Receive the metadata updates from the sessiond. Supports receiving |
1245 | * overlapping metadata, but is needs to always belong to a contiguous | |
1246 | * range starting from 0. | |
1247 | * Be careful about the locks held when calling this function: it needs | |
1248 | * the metadata cache flush to concurrently progress in order to | |
1249 | * complete. | |
331744e3 | 1250 | */ |
28ab034a JG |
1251 | int lttng_ustconsumer_recv_metadata(int sock, |
1252 | uint64_t key, | |
1253 | uint64_t offset, | |
1254 | uint64_t len, | |
1255 | uint64_t version, | |
1256 | struct lttng_consumer_channel *channel, | |
f40b76ae | 1257 | bool invoked_by_timer, |
28ab034a | 1258 | int wait) |
331744e3 | 1259 | { |
0c759fc9 | 1260 | int ret, ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
331744e3 | 1261 | char *metadata_str; |
b1316da1 | 1262 | enum consumer_metadata_cache_write_status cache_write_status; |
331744e3 | 1263 | |
8fd623e0 | 1264 | DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len); |
331744e3 | 1265 | |
64803277 | 1266 | metadata_str = calloc<char>(len); |
331744e3 JD |
1267 | if (!metadata_str) { |
1268 | PERROR("zmalloc metadata string"); | |
1269 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; | |
1270 | goto end; | |
1271 | } | |
1272 | ||
9ce5646a MD |
1273 | health_code_update(); |
1274 | ||
331744e3 JD |
1275 | /* Receive metadata string. */ |
1276 | ret = lttcomm_recv_unix_sock(sock, metadata_str, len); | |
1277 | if (ret < 0) { | |
1278 | /* Session daemon is dead so return gracefully. */ | |
1279 | ret_code = ret; | |
1280 | goto end_free; | |
1281 | } | |
1282 | ||
9ce5646a MD |
1283 | health_code_update(); |
1284 | ||
331744e3 | 1285 | pthread_mutex_lock(&channel->metadata_cache->lock); |
b1316da1 | 1286 | cache_write_status = consumer_metadata_cache_write( |
28ab034a | 1287 | channel->metadata_cache, offset, len, version, metadata_str); |
3bdc49f3 | 1288 | pthread_mutex_unlock(&channel->metadata_cache->lock); |
b1316da1 JG |
1289 | switch (cache_write_status) { |
1290 | case CONSUMER_METADATA_CACHE_WRITE_STATUS_NO_CHANGE: | |
1291 | /* | |
1292 | * The write entirely overlapped with existing contents of the | |
1293 | * same metadata version (same content); there is nothing to do. | |
1294 | */ | |
1295 | break; | |
1296 | case CONSUMER_METADATA_CACHE_WRITE_STATUS_INVALIDATED: | |
1297 | /* | |
1298 | * The metadata cache was invalidated (previously pushed | |
1299 | * content has been overwritten). Reset the stream's consumed | |
1300 | * metadata position to ensure the metadata poll thread consumes | |
1301 | * the whole cache. | |
1302 | */ | |
947bd097 JR |
1303 | |
1304 | /* | |
1305 | * channel::metadata_stream can be null when the metadata | |
1306 | * channel is under a snapshot session type. No need to update | |
1307 | * the stream position in that scenario. | |
1308 | */ | |
cd9adb8b | 1309 | if (channel->metadata_stream != nullptr) { |
947bd097 | 1310 | pthread_mutex_lock(&channel->metadata_stream->lock); |
28ab034a | 1311 | metadata_stream_reset_cache_consumed_position(channel->metadata_stream); |
947bd097 JR |
1312 | pthread_mutex_unlock(&channel->metadata_stream->lock); |
1313 | } else { | |
1314 | /* Validate we are in snapshot mode. */ | |
1315 | LTTNG_ASSERT(!channel->monitor); | |
1316 | } | |
b1316da1 JG |
1317 | /* Fall-through. */ |
1318 | case CONSUMER_METADATA_CACHE_WRITE_STATUS_APPENDED_CONTENT: | |
1319 | /* | |
1320 | * In both cases, the metadata poll thread has new data to | |
1321 | * consume. | |
1322 | */ | |
1323 | ret = consumer_metadata_wakeup_pipe(channel); | |
1324 | if (ret) { | |
1325 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
1326 | goto end_free; | |
1327 | } | |
1328 | break; | |
1329 | case CONSUMER_METADATA_CACHE_WRITE_STATUS_ERROR: | |
331744e3 JD |
1330 | /* Unable to handle metadata. Notify session daemon. */ |
1331 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
a32bd775 DG |
1332 | /* |
1333 | * Skip metadata flush on write error since the offset and len might | |
1334 | * not have been updated which could create an infinite loop below when | |
1335 | * waiting for the metadata cache to be flushed. | |
1336 | */ | |
a32bd775 | 1337 | goto end_free; |
b1316da1 JG |
1338 | default: |
1339 | abort(); | |
331744e3 | 1340 | } |
331744e3 | 1341 | |
94d49140 JD |
1342 | if (!wait) { |
1343 | goto end_free; | |
1344 | } | |
9ce5646a | 1345 | |
f40b76ae | 1346 | consumer_wait_metadata_cache_flushed(channel, offset + len, invoked_by_timer); |
331744e3 JD |
1347 | |
1348 | end_free: | |
1349 | free(metadata_str); | |
1350 | end: | |
1351 | return ret_code; | |
1352 | } | |
1353 | ||
4cbc1a04 DG |
1354 | /* |
1355 | * Receive command from session daemon and process it. | |
1356 | * | |
1357 | * Return 1 on success else a negative value or 0. | |
1358 | */ | |
3bd1e081 | 1359 | int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
1360 | int sock, |
1361 | struct pollfd *consumer_sockpoll) | |
3bd1e081 | 1362 | { |
594c7c00 | 1363 | int ret_func; |
0c759fc9 | 1364 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 | 1365 | struct lttcomm_consumer_msg msg; |
cd9adb8b | 1366 | struct lttng_consumer_channel *channel = nullptr; |
3bd1e081 | 1367 | |
9ce5646a MD |
1368 | health_code_update(); |
1369 | ||
594c7c00 SM |
1370 | { |
1371 | ssize_t ret_recv; | |
1372 | ||
1373 | ret_recv = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
1374 | if (ret_recv != sizeof(msg)) { | |
1375 | DBG("Consumer received unexpected message size %zd (expects %zu)", | |
28ab034a JG |
1376 | ret_recv, |
1377 | sizeof(msg)); | |
594c7c00 SM |
1378 | /* |
1379 | * The ret value might 0 meaning an orderly shutdown but this is ok | |
1380 | * since the caller handles this. | |
1381 | */ | |
1382 | if (ret_recv > 0) { | |
28ab034a | 1383 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
594c7c00 SM |
1384 | ret_recv = -1; |
1385 | } | |
1386 | return ret_recv; | |
489f70e9 | 1387 | } |
3bd1e081 | 1388 | } |
9ce5646a MD |
1389 | |
1390 | health_code_update(); | |
1391 | ||
84382d49 | 1392 | /* deprecated */ |
a0377dfe | 1393 | LTTNG_ASSERT(msg.cmd_type != LTTNG_CONSUMER_STOP); |
3bd1e081 | 1394 | |
9ce5646a MD |
1395 | health_code_update(); |
1396 | ||
3f8e211f | 1397 | /* relayd needs RCU read-side lock */ |
56047f5a | 1398 | lttng::urcu::read_lock_guard read_lock; |
b0b335c8 | 1399 | |
3bd1e081 | 1400 | switch (msg.cmd_type) { |
00e2e675 DG |
1401 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
1402 | { | |
4222116f JR |
1403 | uint32_t major = msg.u.relayd_sock.major; |
1404 | uint32_t minor = msg.u.relayd_sock.minor; | |
1405 | enum lttcomm_sock_proto protocol = | |
28ab034a | 1406 | (enum lttcomm_sock_proto) msg.u.relayd_sock.relayd_socket_protocol; |
4222116f | 1407 | |
f50f23d9 | 1408 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 1409 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
28ab034a JG |
1410 | msg.u.relayd_sock.type, |
1411 | ctx, | |
1412 | sock, | |
1413 | consumer_sockpoll, | |
1414 | msg.u.relayd_sock.session_id, | |
1415 | msg.u.relayd_sock.relayd_session_id, | |
1416 | major, | |
1417 | minor, | |
1418 | protocol); | |
00e2e675 DG |
1419 | goto end_nosignal; |
1420 | } | |
173af62f DG |
1421 | case LTTNG_CONSUMER_DESTROY_RELAYD: |
1422 | { | |
a6ba4fe1 | 1423 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
173af62f DG |
1424 | struct consumer_relayd_sock_pair *relayd; |
1425 | ||
a6ba4fe1 | 1426 | DBG("UST consumer destroying relayd %" PRIu64, index); |
173af62f DG |
1427 | |
1428 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 1429 | relayd = consumer_find_relayd(index); |
cd9adb8b | 1430 | if (relayd == nullptr) { |
3448e266 | 1431 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 1432 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
173af62f DG |
1433 | } |
1434 | ||
a6ba4fe1 DG |
1435 | /* |
1436 | * Each relayd socket pair has a refcount of stream attached to it | |
1437 | * which tells if the relayd is still active or not depending on the | |
1438 | * refcount value. | |
1439 | * | |
1440 | * This will set the destroy flag of the relayd object and destroy it | |
1441 | * if the refcount reaches zero when called. | |
1442 | * | |
1443 | * The destroy can happen either here or when a stream fd hangs up. | |
1444 | */ | |
f50f23d9 DG |
1445 | if (relayd) { |
1446 | consumer_flag_relayd_for_destroy(relayd); | |
1447 | } | |
1448 | ||
d88aee68 | 1449 | goto end_msg_sessiond; |
173af62f | 1450 | } |
3bd1e081 MD |
1451 | case LTTNG_CONSUMER_UPDATE_STREAM: |
1452 | { | |
7ad0a0cb | 1453 | return -ENOSYS; |
3bd1e081 | 1454 | } |
6d805429 | 1455 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 1456 | { |
594c7c00 SM |
1457 | int is_data_pending; |
1458 | ssize_t ret_send; | |
6d805429 | 1459 | uint64_t id = msg.u.data_pending.session_id; |
ca22feea | 1460 | |
6d805429 | 1461 | DBG("UST consumer data pending command for id %" PRIu64, id); |
ca22feea | 1462 | |
3be74084 | 1463 | is_data_pending = consumer_data_pending(id); |
ca22feea DG |
1464 | |
1465 | /* Send back returned value to session daemon */ | |
28ab034a | 1466 | ret_send = lttcomm_send_unix_sock(sock, &is_data_pending, sizeof(is_data_pending)); |
594c7c00 | 1467 | if (ret_send < 0) { |
28ab034a | 1468 | DBG("Error when sending the data pending ret code: %zd", ret_send); |
489f70e9 | 1469 | goto error_fatal; |
ca22feea | 1470 | } |
f50f23d9 DG |
1471 | |
1472 | /* | |
1473 | * No need to send back a status message since the data pending | |
1474 | * returned value is the response. | |
1475 | */ | |
ca22feea | 1476 | break; |
53632229 | 1477 | } |
ffe60014 DG |
1478 | case LTTNG_CONSUMER_ASK_CHANNEL_CREATION: |
1479 | { | |
594c7c00 | 1480 | int ret_ask_channel, ret_add_channel, ret_send; |
b623cb6a | 1481 | struct lttng_ust_ctl_consumer_channel_attr attr; |
d2956687 JG |
1482 | const uint64_t chunk_id = msg.u.ask_channel.chunk_id.value; |
1483 | const struct lttng_credentials buffer_credentials = { | |
ff588497 JR |
1484 | .uid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.ask_channel.buffer_credentials.uid), |
1485 | .gid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.ask_channel.buffer_credentials.gid), | |
d2956687 | 1486 | }; |
ffe60014 DG |
1487 | |
1488 | /* Create a plain object and reserve a channel key. */ | |
a2814ea7 | 1489 | channel = consumer_allocate_channel( |
28ab034a JG |
1490 | msg.u.ask_channel.key, |
1491 | msg.u.ask_channel.session_id, | |
cd9adb8b | 1492 | msg.u.ask_channel.chunk_id.is_set ? &chunk_id : nullptr, |
28ab034a JG |
1493 | msg.u.ask_channel.pathname, |
1494 | msg.u.ask_channel.name, | |
1495 | msg.u.ask_channel.relayd_id, | |
1496 | (enum lttng_event_output) msg.u.ask_channel.output, | |
1497 | msg.u.ask_channel.tracefile_size, | |
1498 | msg.u.ask_channel.tracefile_count, | |
1499 | msg.u.ask_channel.session_id_per_pid, | |
1500 | msg.u.ask_channel.monitor, | |
1501 | msg.u.ask_channel.live_timer_interval, | |
1502 | msg.u.ask_channel.is_live, | |
1503 | msg.u.ask_channel.root_shm_path, | |
1504 | msg.u.ask_channel.shm_path); | |
ffe60014 DG |
1505 | if (!channel) { |
1506 | goto end_channel_error; | |
1507 | } | |
1508 | ||
28ab034a | 1509 | LTTNG_OPTIONAL_SET(&channel->buffer_credentials, buffer_credentials); |
d2956687 | 1510 | |
567eb353 DG |
1511 | /* |
1512 | * Assign UST application UID to the channel. This value is ignored for | |
1513 | * per PID buffers. This is specific to UST thus setting this after the | |
1514 | * allocation. | |
1515 | */ | |
1516 | channel->ust_app_uid = msg.u.ask_channel.ust_app_uid; | |
1517 | ||
ffe60014 DG |
1518 | /* Build channel attributes from received message. */ |
1519 | attr.subbuf_size = msg.u.ask_channel.subbuf_size; | |
1520 | attr.num_subbuf = msg.u.ask_channel.num_subbuf; | |
1521 | attr.overwrite = msg.u.ask_channel.overwrite; | |
1522 | attr.switch_timer_interval = msg.u.ask_channel.switch_timer_interval; | |
1523 | attr.read_timer_interval = msg.u.ask_channel.read_timer_interval; | |
7972aab2 | 1524 | attr.chan_id = msg.u.ask_channel.chan_id; |
ffe60014 | 1525 | memcpy(attr.uuid, msg.u.ask_channel.uuid, sizeof(attr.uuid)); |
28ab034a | 1526 | attr.blocking_timeout = msg.u.ask_channel.blocking_timeout; |
ffe60014 | 1527 | |
0c759fc9 DG |
1528 | /* Match channel buffer type to the UST abi. */ |
1529 | switch (msg.u.ask_channel.output) { | |
1530 | case LTTNG_EVENT_MMAP: | |
1531 | default: | |
fc4b93fa | 1532 | attr.output = LTTNG_UST_ABI_MMAP; |
0c759fc9 DG |
1533 | break; |
1534 | } | |
1535 | ||
ffe60014 DG |
1536 | /* Translate and save channel type. */ |
1537 | switch (msg.u.ask_channel.type) { | |
fc4b93fa | 1538 | case LTTNG_UST_ABI_CHAN_PER_CPU: |
ffe60014 | 1539 | channel->type = CONSUMER_CHANNEL_TYPE_DATA; |
fc4b93fa | 1540 | attr.type = LTTNG_UST_ABI_CHAN_PER_CPU; |
8633d6e3 MD |
1541 | /* |
1542 | * Set refcount to 1 for owner. Below, we will | |
1543 | * pass ownership to the | |
1544 | * consumer_thread_channel_poll() thread. | |
1545 | */ | |
1546 | channel->refcount = 1; | |
ffe60014 | 1547 | break; |
fc4b93fa | 1548 | case LTTNG_UST_ABI_CHAN_METADATA: |
ffe60014 | 1549 | channel->type = CONSUMER_CHANNEL_TYPE_METADATA; |
fc4b93fa | 1550 | attr.type = LTTNG_UST_ABI_CHAN_METADATA; |
ffe60014 DG |
1551 | break; |
1552 | default: | |
a0377dfe | 1553 | abort(); |
ffe60014 DG |
1554 | goto error_fatal; |
1555 | }; | |
1556 | ||
9ce5646a MD |
1557 | health_code_update(); |
1558 | ||
594c7c00 SM |
1559 | ret_ask_channel = ask_channel(ctx, channel, &attr); |
1560 | if (ret_ask_channel < 0) { | |
ffe60014 DG |
1561 | goto end_channel_error; |
1562 | } | |
1563 | ||
fc4b93fa | 1564 | if (msg.u.ask_channel.type == LTTNG_UST_ABI_CHAN_METADATA) { |
594c7c00 SM |
1565 | int ret_allocate; |
1566 | ||
28ab034a | 1567 | ret_allocate = consumer_metadata_cache_allocate(channel); |
594c7c00 | 1568 | if (ret_allocate < 0) { |
fc643247 MD |
1569 | ERR("Allocating metadata cache"); |
1570 | goto end_channel_error; | |
1571 | } | |
1572 | consumer_timer_switch_start(channel, attr.switch_timer_interval); | |
1573 | attr.switch_timer_interval = 0; | |
94d49140 | 1574 | } else { |
e9404c27 JG |
1575 | int monitor_start_ret; |
1576 | ||
28ab034a | 1577 | consumer_timer_live_start(channel, msg.u.ask_channel.live_timer_interval); |
e9404c27 | 1578 | monitor_start_ret = consumer_timer_monitor_start( |
28ab034a | 1579 | channel, msg.u.ask_channel.monitor_timer_interval); |
e9404c27 JG |
1580 | if (monitor_start_ret < 0) { |
1581 | ERR("Starting channel monitoring timer failed"); | |
1582 | goto end_channel_error; | |
1583 | } | |
fc643247 MD |
1584 | } |
1585 | ||
9ce5646a MD |
1586 | health_code_update(); |
1587 | ||
ffe60014 DG |
1588 | /* |
1589 | * Add the channel to the internal state AFTER all streams were created | |
1590 | * and successfully sent to session daemon. This way, all streams must | |
1591 | * be ready before this channel is visible to the threads. | |
fc643247 MD |
1592 | * If add_channel succeeds, ownership of the channel is |
1593 | * passed to consumer_thread_channel_poll(). | |
ffe60014 | 1594 | */ |
594c7c00 SM |
1595 | ret_add_channel = add_channel(channel, ctx); |
1596 | if (ret_add_channel < 0) { | |
fc4b93fa | 1597 | if (msg.u.ask_channel.type == LTTNG_UST_ABI_CHAN_METADATA) { |
ea88ca2a MD |
1598 | if (channel->switch_timer_enabled == 1) { |
1599 | consumer_timer_switch_stop(channel); | |
1600 | } | |
1601 | consumer_metadata_cache_destroy(channel); | |
1602 | } | |
d3e2ba59 JD |
1603 | if (channel->live_timer_enabled == 1) { |
1604 | consumer_timer_live_stop(channel); | |
1605 | } | |
e9404c27 JG |
1606 | if (channel->monitor_timer_enabled == 1) { |
1607 | consumer_timer_monitor_stop(channel); | |
1608 | } | |
ffe60014 DG |
1609 | goto end_channel_error; |
1610 | } | |
1611 | ||
9ce5646a MD |
1612 | health_code_update(); |
1613 | ||
ffe60014 DG |
1614 | /* |
1615 | * Channel and streams are now created. Inform the session daemon that | |
1616 | * everything went well and should wait to receive the channel and | |
1617 | * streams with ustctl API. | |
1618 | */ | |
594c7c00 SM |
1619 | ret_send = consumer_send_status_channel(sock, channel); |
1620 | if (ret_send < 0) { | |
ffe60014 | 1621 | /* |
489f70e9 | 1622 | * There is probably a problem on the socket. |
ffe60014 | 1623 | */ |
489f70e9 | 1624 | goto error_fatal; |
ffe60014 DG |
1625 | } |
1626 | ||
1627 | break; | |
1628 | } | |
1629 | case LTTNG_CONSUMER_GET_CHANNEL: | |
1630 | { | |
1631 | int ret, relayd_err = 0; | |
d88aee68 | 1632 | uint64_t key = msg.u.get_channel.key; |
594c7c00 | 1633 | struct lttng_consumer_channel *found_channel; |
ffe60014 | 1634 | |
594c7c00 SM |
1635 | found_channel = consumer_find_channel(key); |
1636 | if (!found_channel) { | |
8fd623e0 | 1637 | ERR("UST consumer get channel key %" PRIu64 " not found", key); |
e462382a | 1638 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
f3a1fc7b | 1639 | goto end_get_channel; |
ffe60014 DG |
1640 | } |
1641 | ||
9ce5646a MD |
1642 | health_code_update(); |
1643 | ||
a3a86f35 | 1644 | /* Send the channel to sessiond (and relayd, if applicable). */ |
28ab034a | 1645 | ret = send_channel_to_sessiond_and_relayd(sock, found_channel, ctx, &relayd_err); |
ffe60014 DG |
1646 | if (ret < 0) { |
1647 | if (relayd_err) { | |
1648 | /* | |
1649 | * We were unable to send to the relayd the stream so avoid | |
1650 | * sending back a fatal error to the thread since this is OK | |
f2a444f1 DG |
1651 | * and the consumer can continue its work. The above call |
1652 | * has sent the error status message to the sessiond. | |
ffe60014 | 1653 | */ |
f3a1fc7b | 1654 | goto end_get_channel_nosignal; |
ffe60014 DG |
1655 | } |
1656 | /* | |
1657 | * The communicaton was broken hence there is a bad state between | |
1658 | * the consumer and sessiond so stop everything. | |
1659 | */ | |
f3a1fc7b | 1660 | goto error_get_channel_fatal; |
ffe60014 DG |
1661 | } |
1662 | ||
9ce5646a MD |
1663 | health_code_update(); |
1664 | ||
10a50311 JD |
1665 | /* |
1666 | * In no monitor mode, the streams ownership is kept inside the channel | |
1667 | * so don't send them to the data thread. | |
1668 | */ | |
594c7c00 | 1669 | if (!found_channel->monitor) { |
f3a1fc7b | 1670 | goto end_get_channel; |
10a50311 JD |
1671 | } |
1672 | ||
594c7c00 | 1673 | ret = send_streams_to_thread(found_channel, ctx); |
d88aee68 DG |
1674 | if (ret < 0) { |
1675 | /* | |
1676 | * If we are unable to send the stream to the thread, there is | |
1677 | * a big problem so just stop everything. | |
1678 | */ | |
f3a1fc7b | 1679 | goto error_get_channel_fatal; |
ffe60014 | 1680 | } |
ffe60014 | 1681 | /* List MUST be empty after or else it could be reused. */ |
a0377dfe | 1682 | LTTNG_ASSERT(cds_list_empty(&found_channel->streams.head)); |
28ab034a | 1683 | end_get_channel: |
d88aee68 | 1684 | goto end_msg_sessiond; |
28ab034a | 1685 | error_get_channel_fatal: |
f3a1fc7b | 1686 | goto error_fatal; |
28ab034a | 1687 | end_get_channel_nosignal: |
f3a1fc7b | 1688 | goto end_nosignal; |
d88aee68 DG |
1689 | } |
1690 | case LTTNG_CONSUMER_DESTROY_CHANNEL: | |
1691 | { | |
1692 | uint64_t key = msg.u.destroy_channel.key; | |
d88aee68 | 1693 | |
a0cbdd2e MD |
1694 | /* |
1695 | * Only called if streams have not been sent to stream | |
1696 | * manager thread. However, channel has been sent to | |
1697 | * channel manager thread. | |
1698 | */ | |
1699 | notify_thread_del_channel(ctx, key); | |
d88aee68 | 1700 | goto end_msg_sessiond; |
ffe60014 | 1701 | } |
d88aee68 DG |
1702 | case LTTNG_CONSUMER_CLOSE_METADATA: |
1703 | { | |
1704 | int ret; | |
1705 | ||
1706 | ret = close_metadata(msg.u.close_metadata.key); | |
1707 | if (ret != 0) { | |
97535efa | 1708 | ret_code = (lttcomm_return_code) ret; |
d88aee68 DG |
1709 | } |
1710 | ||
1711 | goto end_msg_sessiond; | |
1712 | } | |
7972aab2 DG |
1713 | case LTTNG_CONSUMER_FLUSH_CHANNEL: |
1714 | { | |
1715 | int ret; | |
1716 | ||
1717 | ret = flush_channel(msg.u.flush_channel.key); | |
1718 | if (ret != 0) { | |
97535efa | 1719 | ret_code = (lttcomm_return_code) ret; |
7972aab2 DG |
1720 | } |
1721 | ||
1722 | goto end_msg_sessiond; | |
1723 | } | |
0dd01979 MD |
1724 | case LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL: |
1725 | { | |
1726 | int ret; | |
1727 | ||
28ab034a | 1728 | ret = clear_quiescent_channel(msg.u.clear_quiescent_channel.key); |
0dd01979 | 1729 | if (ret != 0) { |
97535efa | 1730 | ret_code = (lttcomm_return_code) ret; |
0dd01979 MD |
1731 | } |
1732 | ||
1733 | goto end_msg_sessiond; | |
1734 | } | |
d88aee68 | 1735 | case LTTNG_CONSUMER_PUSH_METADATA: |
ffe60014 DG |
1736 | { |
1737 | int ret; | |
d88aee68 | 1738 | uint64_t len = msg.u.push_metadata.len; |
d88aee68 | 1739 | uint64_t key = msg.u.push_metadata.key; |
331744e3 | 1740 | uint64_t offset = msg.u.push_metadata.target_offset; |
93ec662e | 1741 | uint64_t version = msg.u.push_metadata.version; |
594c7c00 | 1742 | struct lttng_consumer_channel *found_channel; |
ffe60014 | 1743 | |
28ab034a | 1744 | DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len); |
ffe60014 | 1745 | |
594c7c00 SM |
1746 | found_channel = consumer_find_channel(key); |
1747 | if (!found_channel) { | |
000baf6a DG |
1748 | /* |
1749 | * This is possible if the metadata creation on the consumer side | |
1750 | * is in flight vis-a-vis a concurrent push metadata from the | |
1751 | * session daemon. Simply return that the channel failed and the | |
1752 | * session daemon will handle that message correctly considering | |
1753 | * that this race is acceptable thus the DBG() statement here. | |
1754 | */ | |
1755 | DBG("UST consumer push metadata %" PRIu64 " not found", key); | |
1756 | ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; | |
a8ffe244 | 1757 | goto end_push_metadata_msg_sessiond; |
d88aee68 DG |
1758 | } |
1759 | ||
9ce5646a MD |
1760 | health_code_update(); |
1761 | ||
c585821b MD |
1762 | if (!len) { |
1763 | /* | |
1764 | * There is nothing to receive. We have simply | |
1765 | * checked whether the channel can be found. | |
1766 | */ | |
1767 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
a8ffe244 | 1768 | goto end_push_metadata_msg_sessiond; |
c585821b MD |
1769 | } |
1770 | ||
d88aee68 | 1771 | /* Tell session daemon we are ready to receive the metadata. */ |
0c759fc9 | 1772 | ret = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
ffe60014 DG |
1773 | if (ret < 0) { |
1774 | /* Somehow, the session daemon is not responding anymore. */ | |
a8ffe244 | 1775 | goto error_push_metadata_fatal; |
d88aee68 DG |
1776 | } |
1777 | ||
9ce5646a MD |
1778 | health_code_update(); |
1779 | ||
d88aee68 | 1780 | /* Wait for more data. */ |
9ce5646a MD |
1781 | health_poll_entry(); |
1782 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
1783 | health_poll_exit(); | |
84382d49 | 1784 | if (ret) { |
a8ffe244 | 1785 | goto error_push_metadata_fatal; |
d88aee68 DG |
1786 | } |
1787 | ||
9ce5646a MD |
1788 | health_code_update(); |
1789 | ||
28ab034a | 1790 | ret = lttng_ustconsumer_recv_metadata( |
f40b76ae | 1791 | sock, key, offset, len, version, found_channel, false, 1); |
d88aee68 | 1792 | if (ret < 0) { |
331744e3 | 1793 | /* error receiving from sessiond */ |
a8ffe244 | 1794 | goto error_push_metadata_fatal; |
331744e3 | 1795 | } else { |
97535efa | 1796 | ret_code = (lttcomm_return_code) ret; |
a8ffe244 | 1797 | goto end_push_metadata_msg_sessiond; |
d88aee68 | 1798 | } |
28ab034a | 1799 | end_push_metadata_msg_sessiond: |
a8ffe244 | 1800 | goto end_msg_sessiond; |
28ab034a | 1801 | error_push_metadata_fatal: |
a8ffe244 | 1802 | goto error_fatal; |
d88aee68 DG |
1803 | } |
1804 | case LTTNG_CONSUMER_SETUP_METADATA: | |
1805 | { | |
1806 | int ret; | |
1807 | ||
1808 | ret = setup_metadata(ctx, msg.u.setup_metadata.key); | |
1809 | if (ret) { | |
97535efa | 1810 | ret_code = (lttcomm_return_code) ret; |
d88aee68 DG |
1811 | } |
1812 | goto end_msg_sessiond; | |
ffe60014 | 1813 | } |
6dc3064a DG |
1814 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
1815 | { | |
594c7c00 | 1816 | struct lttng_consumer_channel *found_channel; |
3eb928aa | 1817 | uint64_t key = msg.u.snapshot_channel.key; |
594c7c00 | 1818 | int ret_send; |
3eb928aa | 1819 | |
594c7c00 SM |
1820 | found_channel = consumer_find_channel(key); |
1821 | if (!found_channel) { | |
3eb928aa MD |
1822 | DBG("UST snapshot channel not found for key %" PRIu64, key); |
1823 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
10a50311 | 1824 | } else { |
3eb928aa | 1825 | if (msg.u.snapshot_channel.metadata) { |
594c7c00 SM |
1826 | int ret_snapshot; |
1827 | ||
1828 | ret_snapshot = snapshot_metadata(found_channel, | |
28ab034a JG |
1829 | key, |
1830 | msg.u.snapshot_channel.pathname, | |
1831 | msg.u.snapshot_channel.relayd_id, | |
1832 | ctx); | |
594c7c00 | 1833 | if (ret_snapshot < 0) { |
3eb928aa MD |
1834 | ERR("Snapshot metadata failed"); |
1835 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
1836 | } | |
1837 | } else { | |
594c7c00 SM |
1838 | int ret_snapshot; |
1839 | ||
28ab034a JG |
1840 | ret_snapshot = snapshot_channel( |
1841 | found_channel, | |
1842 | key, | |
1843 | msg.u.snapshot_channel.pathname, | |
1844 | msg.u.snapshot_channel.relayd_id, | |
1845 | msg.u.snapshot_channel.nb_packets_per_stream, | |
1846 | ctx); | |
594c7c00 | 1847 | if (ret_snapshot < 0) { |
3eb928aa MD |
1848 | ERR("Snapshot channel failed"); |
1849 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
1850 | } | |
10a50311 JD |
1851 | } |
1852 | } | |
9ce5646a | 1853 | health_code_update(); |
594c7c00 SM |
1854 | ret_send = consumer_send_status_msg(sock, ret_code); |
1855 | if (ret_send < 0) { | |
6dc3064a DG |
1856 | /* Somehow, the session daemon is not responding anymore. */ |
1857 | goto end_nosignal; | |
1858 | } | |
9ce5646a | 1859 | health_code_update(); |
6dc3064a DG |
1860 | break; |
1861 | } | |
fb83fe64 JD |
1862 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1863 | { | |
beb59458 MJ |
1864 | int ret = 0; |
1865 | uint64_t discarded_events; | |
fb83fe64 JD |
1866 | struct lttng_ht_iter iter; |
1867 | struct lttng_ht *ht; | |
1868 | struct lttng_consumer_stream *stream; | |
1869 | uint64_t id = msg.u.discarded_events.session_id; | |
1870 | uint64_t key = msg.u.discarded_events.channel_key; | |
1871 | ||
28ab034a | 1872 | DBG("UST consumer discarded events command for session id %" PRIu64, id); |
fa29bfbf | 1873 | pthread_mutex_lock(&the_consumer_data.lock); |
fb83fe64 | 1874 | |
fa29bfbf | 1875 | ht = the_consumer_data.stream_list_ht; |
fb83fe64 JD |
1876 | |
1877 | /* | |
1878 | * We only need a reference to the channel, but they are not | |
1879 | * directly indexed, so we just use the first matching stream | |
1880 | * to extract the information we need, we default to 0 if not | |
1881 | * found (no events are dropped if the channel is not yet in | |
1882 | * use). | |
1883 | */ | |
beb59458 | 1884 | discarded_events = 0; |
fb83fe64 | 1885 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
1886 | ht->hash_fct(&id, lttng_ht_seed), |
1887 | ht->match_fct, | |
1888 | &id, | |
1889 | &iter.iter, | |
1890 | stream, | |
1891 | node_session_id.node) | |
1892 | { | |
fb83fe64 | 1893 | if (stream->chan->key == key) { |
beb59458 | 1894 | discarded_events = stream->chan->discarded_events; |
fb83fe64 JD |
1895 | break; |
1896 | } | |
1897 | } | |
fa29bfbf | 1898 | pthread_mutex_unlock(&the_consumer_data.lock); |
fb83fe64 | 1899 | |
28ab034a JG |
1900 | DBG("UST consumer discarded events command for session id %" PRIu64 |
1901 | ", channel key %" PRIu64, | |
1902 | id, | |
1903 | key); | |
fb83fe64 JD |
1904 | |
1905 | health_code_update(); | |
1906 | ||
1907 | /* Send back returned value to session daemon */ | |
beb59458 | 1908 | ret = lttcomm_send_unix_sock(sock, &discarded_events, sizeof(discarded_events)); |
fb83fe64 JD |
1909 | if (ret < 0) { |
1910 | PERROR("send discarded events"); | |
1911 | goto error_fatal; | |
1912 | } | |
1913 | ||
1914 | break; | |
1915 | } | |
1916 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1917 | { | |
28ab034a | 1918 | int ret; |
9a06e8d4 | 1919 | uint64_t lost_packets; |
fb83fe64 JD |
1920 | struct lttng_ht_iter iter; |
1921 | struct lttng_ht *ht; | |
1922 | struct lttng_consumer_stream *stream; | |
1923 | uint64_t id = msg.u.lost_packets.session_id; | |
1924 | uint64_t key = msg.u.lost_packets.channel_key; | |
1925 | ||
28ab034a | 1926 | DBG("UST consumer lost packets command for session id %" PRIu64, id); |
fa29bfbf | 1927 | pthread_mutex_lock(&the_consumer_data.lock); |
fb83fe64 | 1928 | |
fa29bfbf | 1929 | ht = the_consumer_data.stream_list_ht; |
fb83fe64 JD |
1930 | |
1931 | /* | |
1932 | * We only need a reference to the channel, but they are not | |
1933 | * directly indexed, so we just use the first matching stream | |
1934 | * to extract the information we need, we default to 0 if not | |
1935 | * found (no packets lost if the channel is not yet in use). | |
1936 | */ | |
28ab034a | 1937 | lost_packets = 0; |
fb83fe64 | 1938 | cds_lfht_for_each_entry_duplicate(ht->ht, |
28ab034a JG |
1939 | ht->hash_fct(&id, lttng_ht_seed), |
1940 | ht->match_fct, | |
1941 | &id, | |
1942 | &iter.iter, | |
1943 | stream, | |
1944 | node_session_id.node) | |
1945 | { | |
fb83fe64 | 1946 | if (stream->chan->key == key) { |
28ab034a | 1947 | lost_packets = stream->chan->lost_packets; |
fb83fe64 JD |
1948 | break; |
1949 | } | |
1950 | } | |
fa29bfbf | 1951 | pthread_mutex_unlock(&the_consumer_data.lock); |
fb83fe64 | 1952 | |
28ab034a JG |
1953 | DBG("UST consumer lost packets command for session id %" PRIu64 |
1954 | ", channel key %" PRIu64, | |
1955 | id, | |
1956 | key); | |
fb83fe64 JD |
1957 | |
1958 | health_code_update(); | |
1959 | ||
1960 | /* Send back returned value to session daemon */ | |
28ab034a | 1961 | ret = lttcomm_send_unix_sock(sock, &lost_packets, sizeof(lost_packets)); |
fb83fe64 JD |
1962 | if (ret < 0) { |
1963 | PERROR("send lost packets"); | |
1964 | goto error_fatal; | |
1965 | } | |
1966 | ||
1967 | break; | |
1968 | } | |
b3530820 JG |
1969 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1970 | { | |
28ab034a | 1971 | int channel_monitor_pipe, ret_send, ret_set_channel_monitor_pipe; |
594c7c00 | 1972 | ssize_t ret_recv; |
b3530820 JG |
1973 | |
1974 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1975 | /* Successfully received the command's type. */ | |
594c7c00 SM |
1976 | ret_send = consumer_send_status_msg(sock, ret_code); |
1977 | if (ret_send < 0) { | |
b3530820 JG |
1978 | goto error_fatal; |
1979 | } | |
1980 | ||
28ab034a | 1981 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, 1); |
594c7c00 | 1982 | if (ret_recv != sizeof(channel_monitor_pipe)) { |
b3530820 JG |
1983 | ERR("Failed to receive channel monitor pipe"); |
1984 | goto error_fatal; | |
1985 | } | |
1986 | ||
1987 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
594c7c00 | 1988 | ret_set_channel_monitor_pipe = |
28ab034a | 1989 | consumer_timer_thread_set_channel_monitor_pipe(channel_monitor_pipe); |
594c7c00 | 1990 | if (!ret_set_channel_monitor_pipe) { |
b3530820 | 1991 | int flags; |
594c7c00 | 1992 | int ret_fcntl; |
b3530820 JG |
1993 | |
1994 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1995 | /* Set the pipe as non-blocking. */ | |
594c7c00 SM |
1996 | ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); |
1997 | if (ret_fcntl == -1) { | |
b3530820 JG |
1998 | PERROR("fcntl get flags of the channel monitoring pipe"); |
1999 | goto error_fatal; | |
2000 | } | |
594c7c00 | 2001 | flags = ret_fcntl; |
b3530820 | 2002 | |
28ab034a | 2003 | ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, flags | O_NONBLOCK); |
594c7c00 | 2004 | if (ret_fcntl == -1) { |
b3530820 JG |
2005 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); |
2006 | goto error_fatal; | |
2007 | } | |
2008 | DBG("Channel monitor pipe set as non-blocking"); | |
2009 | } else { | |
2010 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
2011 | } | |
2012 | goto end_msg_sessiond; | |
2013 | } | |
b99a8d42 JD |
2014 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
2015 | { | |
594c7c00 | 2016 | struct lttng_consumer_channel *found_channel; |
92b7a7f8 | 2017 | uint64_t key = msg.u.rotate_channel.key; |
594c7c00 | 2018 | int ret_send_status; |
b99a8d42 | 2019 | |
594c7c00 SM |
2020 | found_channel = consumer_find_channel(key); |
2021 | if (!found_channel) { | |
92b7a7f8 MD |
2022 | DBG("Channel %" PRIu64 " not found", key); |
2023 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
2024 | } else { | |
594c7c00 SM |
2025 | int rotate_channel; |
2026 | ||
92b7a7f8 MD |
2027 | /* |
2028 | * Sample the rotate position of all the streams in | |
2029 | * this channel. | |
2030 | */ | |
594c7c00 | 2031 | rotate_channel = lttng_consumer_rotate_channel( |
28ab034a | 2032 | found_channel, key, msg.u.rotate_channel.relayd_id); |
594c7c00 | 2033 | if (rotate_channel < 0) { |
92b7a7f8 MD |
2034 | ERR("Rotate channel failed"); |
2035 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
2036 | } | |
b99a8d42 | 2037 | |
92b7a7f8 MD |
2038 | health_code_update(); |
2039 | } | |
594c7c00 SM |
2040 | |
2041 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
2042 | if (ret_send_status < 0) { | |
b99a8d42 | 2043 | /* Somehow, the session daemon is not responding anymore. */ |
41c7a76d | 2044 | goto end_rotate_channel_nosignal; |
b99a8d42 JD |
2045 | } |
2046 | ||
2047 | /* | |
2048 | * Rotate the streams that are ready right now. | |
2049 | * FIXME: this is a second consecutive iteration over the | |
2050 | * streams in a channel, there is probably a better way to | |
2051 | * handle this, but it needs to be after the | |
2052 | * consumer_send_status_msg() call. | |
2053 | */ | |
594c7c00 SM |
2054 | if (found_channel) { |
2055 | int ret_rotate_read_streams; | |
2056 | ||
2057 | ret_rotate_read_streams = | |
28ab034a | 2058 | lttng_consumer_rotate_ready_streams(found_channel, key); |
594c7c00 | 2059 | if (ret_rotate_read_streams < 0) { |
92b7a7f8 MD |
2060 | ERR("Rotate channel failed"); |
2061 | } | |
b99a8d42 JD |
2062 | } |
2063 | break; | |
28ab034a | 2064 | end_rotate_channel_nosignal: |
41c7a76d | 2065 | goto end_nosignal; |
b99a8d42 | 2066 | } |
5f3aff8b MD |
2067 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
2068 | { | |
594c7c00 | 2069 | struct lttng_consumer_channel *found_channel; |
5f3aff8b | 2070 | uint64_t key = msg.u.clear_channel.key; |
594c7c00 | 2071 | int ret_send_status; |
5f3aff8b | 2072 | |
594c7c00 SM |
2073 | found_channel = consumer_find_channel(key); |
2074 | if (!found_channel) { | |
5f3aff8b MD |
2075 | DBG("Channel %" PRIu64 " not found", key); |
2076 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
2077 | } else { | |
594c7c00 SM |
2078 | int ret_clear_channel; |
2079 | ||
28ab034a | 2080 | ret_clear_channel = lttng_consumer_clear_channel(found_channel); |
594c7c00 | 2081 | if (ret_clear_channel) { |
5f3aff8b | 2082 | ERR("Clear channel failed key %" PRIu64, key); |
97535efa | 2083 | ret_code = (lttcomm_return_code) ret_clear_channel; |
5f3aff8b MD |
2084 | } |
2085 | ||
2086 | health_code_update(); | |
2087 | } | |
594c7c00 SM |
2088 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
2089 | if (ret_send_status < 0) { | |
5f3aff8b MD |
2090 | /* Somehow, the session daemon is not responding anymore. */ |
2091 | goto end_nosignal; | |
2092 | } | |
2093 | break; | |
2094 | } | |
d2956687 | 2095 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 2096 | { |
594c7c00 | 2097 | int ret_send_status; |
328c2fe7 | 2098 | lttng_uuid sessiond_uuid; |
594c7c00 | 2099 | |
28ab034a JG |
2100 | std::copy(std::begin(msg.u.init.sessiond_uuid), |
2101 | std::end(msg.u.init.sessiond_uuid), | |
2102 | sessiond_uuid.begin()); | |
328c2fe7 | 2103 | ret_code = lttng_consumer_init_command(ctx, sessiond_uuid); |
d88744a4 | 2104 | health_code_update(); |
594c7c00 SM |
2105 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
2106 | if (ret_send_status < 0) { | |
d88744a4 JD |
2107 | /* Somehow, the session daemon is not responding anymore. */ |
2108 | goto end_nosignal; | |
2109 | } | |
2110 | break; | |
2111 | } | |
d2956687 | 2112 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 2113 | { |
d2956687 | 2114 | const struct lttng_credentials credentials = { |
28ab034a JG |
2115 | .uid = LTTNG_OPTIONAL_INIT_VALUE( |
2116 | msg.u.create_trace_chunk.credentials.value.uid), | |
2117 | .gid = LTTNG_OPTIONAL_INIT_VALUE( | |
2118 | msg.u.create_trace_chunk.credentials.value.gid), | |
d2956687 | 2119 | }; |
28ab034a JG |
2120 | const bool is_local_trace = !msg.u.create_trace_chunk.relayd_id.is_set; |
2121 | const uint64_t relayd_id = msg.u.create_trace_chunk.relayd_id.value; | |
2122 | const char *chunk_override_name = *msg.u.create_trace_chunk.override_name ? | |
2123 | msg.u.create_trace_chunk.override_name : | |
cd9adb8b JG |
2124 | nullptr; |
2125 | struct lttng_directory_handle *chunk_directory_handle = nullptr; | |
d88744a4 | 2126 | |
d2956687 JG |
2127 | /* |
2128 | * The session daemon will only provide a chunk directory file | |
2129 | * descriptor for local traces. | |
2130 | */ | |
2131 | if (is_local_trace) { | |
2132 | int chunk_dirfd; | |
594c7c00 SM |
2133 | int ret_send_status; |
2134 | ssize_t ret_recv; | |
19990ed5 | 2135 | |
d2956687 | 2136 | /* Acnowledge the reception of the command. */ |
28ab034a | 2137 | ret_send_status = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
594c7c00 | 2138 | if (ret_send_status < 0) { |
d2956687 JG |
2139 | /* Somehow, the session daemon is not responding anymore. */ |
2140 | goto end_nosignal; | |
2141 | } | |
92816cc3 | 2142 | |
5da88b0f MD |
2143 | /* |
2144 | * Receive trace chunk domain dirfd. | |
2145 | */ | |
28ab034a | 2146 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &chunk_dirfd, 1); |
594c7c00 | 2147 | if (ret_recv != sizeof(chunk_dirfd)) { |
5da88b0f | 2148 | ERR("Failed to receive trace chunk domain directory file descriptor"); |
d2956687 JG |
2149 | goto error_fatal; |
2150 | } | |
92816cc3 | 2151 | |
28ab034a JG |
2152 | DBG("Received trace chunk domain directory fd (%d)", chunk_dirfd); |
2153 | chunk_directory_handle = | |
2154 | lttng_directory_handle_create_from_dirfd(chunk_dirfd); | |
cbf53d23 | 2155 | if (!chunk_directory_handle) { |
5da88b0f | 2156 | ERR("Failed to initialize chunk domain directory handle from directory file descriptor"); |
d2956687 JG |
2157 | if (close(chunk_dirfd)) { |
2158 | PERROR("Failed to close chunk directory file descriptor"); | |
2159 | } | |
2160 | goto error_fatal; | |
2161 | } | |
92816cc3 JG |
2162 | } |
2163 | ||
d2956687 | 2164 | ret_code = lttng_consumer_create_trace_chunk( |
cd9adb8b | 2165 | !is_local_trace ? &relayd_id : nullptr, |
28ab034a JG |
2166 | msg.u.create_trace_chunk.session_id, |
2167 | msg.u.create_trace_chunk.chunk_id, | |
2168 | (time_t) msg.u.create_trace_chunk.creation_timestamp, | |
2169 | chunk_override_name, | |
cd9adb8b | 2170 | msg.u.create_trace_chunk.credentials.is_set ? &credentials : nullptr, |
28ab034a | 2171 | chunk_directory_handle); |
cbf53d23 | 2172 | lttng_directory_handle_put(chunk_directory_handle); |
d2956687 | 2173 | goto end_msg_sessiond; |
00fb02ac | 2174 | } |
d2956687 | 2175 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 2176 | { |
bbc4768c | 2177 | enum lttng_trace_chunk_command_type close_command = |
28ab034a JG |
2178 | (lttng_trace_chunk_command_type) msg.u.close_trace_chunk.close_command.value; |
2179 | const uint64_t relayd_id = msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f | 2180 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
d00fb490 | 2181 | char closed_trace_chunk_path[LTTNG_PATH_MAX] = {}; |
ecd1a12f | 2182 | int ret; |
d2956687 JG |
2183 | |
2184 | ret_code = lttng_consumer_close_trace_chunk( | |
cd9adb8b | 2185 | msg.u.close_trace_chunk.relayd_id.is_set ? &relayd_id : nullptr, |
28ab034a JG |
2186 | msg.u.close_trace_chunk.session_id, |
2187 | msg.u.close_trace_chunk.chunk_id, | |
2188 | (time_t) msg.u.close_trace_chunk.close_timestamp, | |
cd9adb8b | 2189 | msg.u.close_trace_chunk.close_command.is_set ? &close_command : nullptr, |
28ab034a | 2190 | closed_trace_chunk_path); |
ecd1a12f MD |
2191 | reply.ret_code = ret_code; |
2192 | reply.path_length = strlen(closed_trace_chunk_path) + 1; | |
2193 | ret = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
2194 | if (ret != sizeof(reply)) { | |
2195 | goto error_fatal; | |
2196 | } | |
28ab034a | 2197 | ret = lttcomm_send_unix_sock(sock, closed_trace_chunk_path, reply.path_length); |
ecd1a12f MD |
2198 | if (ret != reply.path_length) { |
2199 | goto error_fatal; | |
2200 | } | |
2201 | goto end_nosignal; | |
a1ae2ea5 | 2202 | } |
d2956687 | 2203 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 2204 | { |
28ab034a | 2205 | const uint64_t relayd_id = msg.u.trace_chunk_exists.relayd_id.value; |
d2956687 JG |
2206 | |
2207 | ret_code = lttng_consumer_trace_chunk_exists( | |
cd9adb8b | 2208 | msg.u.trace_chunk_exists.relayd_id.is_set ? &relayd_id : nullptr, |
28ab034a JG |
2209 | msg.u.trace_chunk_exists.session_id, |
2210 | msg.u.trace_chunk_exists.chunk_id); | |
d2956687 | 2211 | goto end_msg_sessiond; |
04ed9e10 JG |
2212 | } |
2213 | case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: | |
2214 | { | |
2215 | const uint64_t key = msg.u.open_channel_packets.key; | |
28ab034a | 2216 | struct lttng_consumer_channel *found_channel = consumer_find_channel(key); |
04ed9e10 | 2217 | |
594c7c00 SM |
2218 | if (found_channel) { |
2219 | pthread_mutex_lock(&found_channel->lock); | |
28ab034a | 2220 | ret_code = lttng_consumer_open_channel_packets(found_channel); |
594c7c00 | 2221 | pthread_mutex_unlock(&found_channel->lock); |
04ed9e10 JG |
2222 | } else { |
2223 | /* | |
2224 | * The channel could have disappeared in per-pid | |
2225 | * buffering mode. | |
2226 | */ | |
2227 | DBG("Channel %" PRIu64 " not found", key); | |
2228 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
2229 | } | |
2230 | ||
2231 | health_code_update(); | |
2232 | goto end_msg_sessiond; | |
3654ed19 | 2233 | } |
3bd1e081 MD |
2234 | default: |
2235 | break; | |
2236 | } | |
3f8e211f | 2237 | |
3bd1e081 | 2238 | end_nosignal: |
4cbc1a04 DG |
2239 | /* |
2240 | * Return 1 to indicate success since the 0 value can be a socket | |
2241 | * shutdown during the recv() or send() call. | |
2242 | */ | |
594c7c00 | 2243 | ret_func = 1; |
f3a1fc7b | 2244 | goto end; |
ffe60014 DG |
2245 | |
2246 | end_msg_sessiond: | |
2247 | /* | |
2248 | * The returned value here is not useful since either way we'll return 1 to | |
2249 | * the caller because the session daemon socket management is done | |
2250 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
2251 | */ | |
594c7c00 SM |
2252 | { |
2253 | int ret_send_status; | |
2254 | ||
2255 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
2256 | if (ret_send_status < 0) { | |
2257 | goto error_fatal; | |
2258 | } | |
489f70e9 | 2259 | } |
594c7c00 SM |
2260 | |
2261 | ret_func = 1; | |
f3a1fc7b | 2262 | goto end; |
9ce5646a | 2263 | |
ffe60014 DG |
2264 | end_channel_error: |
2265 | if (channel) { | |
a00932c8 | 2266 | consumer_del_channel(channel); |
ffe60014 DG |
2267 | } |
2268 | /* We have to send a status channel message indicating an error. */ | |
594c7c00 SM |
2269 | { |
2270 | int ret_send_status; | |
2271 | ||
cd9adb8b | 2272 | ret_send_status = consumer_send_status_channel(sock, nullptr); |
594c7c00 SM |
2273 | if (ret_send_status < 0) { |
2274 | /* Stop everything if session daemon can not be notified. */ | |
2275 | goto error_fatal; | |
2276 | } | |
ffe60014 | 2277 | } |
594c7c00 SM |
2278 | |
2279 | ret_func = 1; | |
f3a1fc7b | 2280 | goto end; |
9ce5646a | 2281 | |
ffe60014 | 2282 | error_fatal: |
ffe60014 | 2283 | /* This will issue a consumer stop. */ |
594c7c00 | 2284 | ret_func = -1; |
f3a1fc7b JG |
2285 | goto end; |
2286 | ||
2287 | end: | |
f3a1fc7b | 2288 | health_code_update(); |
594c7c00 | 2289 | return ret_func; |
3bd1e081 MD |
2290 | } |
2291 | ||
28ab034a | 2292 | int lttng_ust_flush_buffer(struct lttng_consumer_stream *stream, int producer_active) |
fc6d7a51 | 2293 | { |
a0377dfe FD |
2294 | LTTNG_ASSERT(stream); |
2295 | LTTNG_ASSERT(stream->ustream); | |
fc6d7a51 | 2296 | |
881fc67f | 2297 | return lttng_ust_ctl_flush_buffer(stream->ustream, producer_active); |
fc6d7a51 JD |
2298 | } |
2299 | ||
ffe60014 | 2300 | /* |
e9404c27 | 2301 | * Take a snapshot for a specific stream. |
ffe60014 DG |
2302 | * |
2303 | * Returns 0 on success, < 0 on error | |
2304 | */ | |
2305 | int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream) | |
3bd1e081 | 2306 | { |
a0377dfe FD |
2307 | LTTNG_ASSERT(stream); |
2308 | LTTNG_ASSERT(stream->ustream); | |
ffe60014 | 2309 | |
b623cb6a | 2310 | return lttng_ust_ctl_snapshot(stream->ustream); |
3bd1e081 MD |
2311 | } |
2312 | ||
e9404c27 JG |
2313 | /* |
2314 | * Sample consumed and produced positions for a specific stream. | |
2315 | * | |
2316 | * Returns 0 on success, < 0 on error. | |
2317 | */ | |
28ab034a | 2318 | int lttng_ustconsumer_sample_snapshot_positions(struct lttng_consumer_stream *stream) |
e9404c27 | 2319 | { |
a0377dfe FD |
2320 | LTTNG_ASSERT(stream); |
2321 | LTTNG_ASSERT(stream->ustream); | |
e9404c27 | 2322 | |
b623cb6a | 2323 | return lttng_ust_ctl_snapshot_sample_positions(stream->ustream); |
e9404c27 JG |
2324 | } |
2325 | ||
ffe60014 DG |
2326 | /* |
2327 | * Get the produced position | |
2328 | * | |
2329 | * Returns 0 on success, < 0 on error | |
2330 | */ | |
28ab034a JG |
2331 | int lttng_ustconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
2332 | unsigned long *pos) | |
3bd1e081 | 2333 | { |
a0377dfe FD |
2334 | LTTNG_ASSERT(stream); |
2335 | LTTNG_ASSERT(stream->ustream); | |
2336 | LTTNG_ASSERT(pos); | |
7a57cf92 | 2337 | |
b623cb6a | 2338 | return lttng_ust_ctl_snapshot_get_produced(stream->ustream, pos); |
ffe60014 | 2339 | } |
7a57cf92 | 2340 | |
10a50311 JD |
2341 | /* |
2342 | * Get the consumed position | |
2343 | * | |
2344 | * Returns 0 on success, < 0 on error | |
2345 | */ | |
28ab034a JG |
2346 | int lttng_ustconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, |
2347 | unsigned long *pos) | |
10a50311 | 2348 | { |
a0377dfe FD |
2349 | LTTNG_ASSERT(stream); |
2350 | LTTNG_ASSERT(stream->ustream); | |
2351 | LTTNG_ASSERT(pos); | |
10a50311 | 2352 | |
b623cb6a | 2353 | return lttng_ust_ctl_snapshot_get_consumed(stream->ustream, pos); |
10a50311 JD |
2354 | } |
2355 | ||
28ab034a | 2356 | int lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream, int producer) |
84a182ce | 2357 | { |
a0377dfe FD |
2358 | LTTNG_ASSERT(stream); |
2359 | LTTNG_ASSERT(stream->ustream); | |
84a182ce | 2360 | |
881fc67f | 2361 | return lttng_ust_ctl_flush_buffer(stream->ustream, producer); |
84a182ce DG |
2362 | } |
2363 | ||
881fc67f | 2364 | int lttng_ustconsumer_clear_buffer(struct lttng_consumer_stream *stream) |
214f70e0 | 2365 | { |
a0377dfe FD |
2366 | LTTNG_ASSERT(stream); |
2367 | LTTNG_ASSERT(stream->ustream); | |
214f70e0 | 2368 | |
881fc67f | 2369 | return lttng_ust_ctl_clear_buffer(stream->ustream); |
214f70e0 JR |
2370 | } |
2371 | ||
28ab034a | 2372 | int lttng_ustconsumer_get_current_timestamp(struct lttng_consumer_stream *stream, uint64_t *ts) |
84a182ce | 2373 | { |
a0377dfe FD |
2374 | LTTNG_ASSERT(stream); |
2375 | LTTNG_ASSERT(stream->ustream); | |
2376 | LTTNG_ASSERT(ts); | |
84a182ce | 2377 | |
b623cb6a | 2378 | return lttng_ust_ctl_get_current_timestamp(stream->ustream, ts); |
84a182ce DG |
2379 | } |
2380 | ||
28ab034a | 2381 | int lttng_ustconsumer_get_sequence_number(struct lttng_consumer_stream *stream, uint64_t *seq) |
fb83fe64 | 2382 | { |
a0377dfe FD |
2383 | LTTNG_ASSERT(stream); |
2384 | LTTNG_ASSERT(stream->ustream); | |
2385 | LTTNG_ASSERT(seq); | |
fb83fe64 | 2386 | |
b623cb6a | 2387 | return lttng_ust_ctl_get_sequence_number(stream->ustream, seq); |
fb83fe64 JD |
2388 | } |
2389 | ||
ffe60014 | 2390 | /* |
0dd01979 | 2391 | * Called when the stream signals the consumer that it has hung up. |
ffe60014 DG |
2392 | */ |
2393 | void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream) | |
2394 | { | |
a0377dfe FD |
2395 | LTTNG_ASSERT(stream); |
2396 | LTTNG_ASSERT(stream->ustream); | |
2c1dd183 | 2397 | |
0dd01979 MD |
2398 | pthread_mutex_lock(&stream->lock); |
2399 | if (!stream->quiescent) { | |
881fc67f MD |
2400 | if (lttng_ust_ctl_flush_buffer(stream->ustream, 0) < 0) { |
2401 | ERR("Failed to flush buffer on stream hang-up"); | |
2402 | } else { | |
2403 | stream->quiescent = true; | |
2404 | } | |
0dd01979 | 2405 | } |
d9ab8c66 | 2406 | |
ffe60014 | 2407 | stream->hangup_flush_done = 1; |
d9ab8c66 | 2408 | pthread_mutex_unlock(&stream->lock); |
ffe60014 | 2409 | } |
ee77a7b0 | 2410 | |
ffe60014 DG |
2411 | void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan) |
2412 | { | |
4628484a MD |
2413 | int i; |
2414 | ||
a0377dfe FD |
2415 | LTTNG_ASSERT(chan); |
2416 | LTTNG_ASSERT(chan->uchan); | |
2417 | LTTNG_ASSERT(chan->buffer_credentials.is_set); | |
e316aad5 | 2418 | |
ea88ca2a MD |
2419 | if (chan->switch_timer_enabled == 1) { |
2420 | consumer_timer_switch_stop(chan); | |
2421 | } | |
4628484a MD |
2422 | for (i = 0; i < chan->nr_stream_fds; i++) { |
2423 | int ret; | |
2424 | ||
2425 | ret = close(chan->stream_fds[i]); | |
2426 | if (ret) { | |
2427 | PERROR("close"); | |
2428 | } | |
2429 | if (chan->shm_path[0]) { | |
2430 | char shm_path[PATH_MAX]; | |
2431 | ||
2432 | ret = get_stream_shm_path(shm_path, chan->shm_path, i); | |
2433 | if (ret) { | |
2434 | ERR("Cannot get stream shm path"); | |
2435 | } | |
d2956687 | 2436 | ret = run_as_unlink(shm_path, |
28ab034a JG |
2437 | lttng_credentials_get_uid(LTTNG_OPTIONAL_GET_PTR( |
2438 | chan->buffer_credentials)), | |
2439 | lttng_credentials_get_gid(LTTNG_OPTIONAL_GET_PTR( | |
2440 | chan->buffer_credentials))); | |
4628484a | 2441 | if (ret) { |
4628484a MD |
2442 | PERROR("unlink %s", shm_path); |
2443 | } | |
2444 | } | |
2445 | } | |
3bd1e081 MD |
2446 | } |
2447 | ||
b83e03c4 MD |
2448 | void lttng_ustconsumer_free_channel(struct lttng_consumer_channel *chan) |
2449 | { | |
a0377dfe FD |
2450 | LTTNG_ASSERT(chan); |
2451 | LTTNG_ASSERT(chan->uchan); | |
2452 | LTTNG_ASSERT(chan->buffer_credentials.is_set); | |
b83e03c4 MD |
2453 | |
2454 | consumer_metadata_cache_destroy(chan); | |
b623cb6a | 2455 | lttng_ust_ctl_destroy_channel(chan->uchan); |
ea853771 JR |
2456 | /* Try to rmdir all directories under shm_path root. */ |
2457 | if (chan->root_shm_path[0]) { | |
28ab034a JG |
2458 | (void) run_as_rmdir_recursive( |
2459 | chan->root_shm_path, | |
2460 | lttng_credentials_get_uid(LTTNG_OPTIONAL_GET_PTR(chan->buffer_credentials)), | |
2461 | lttng_credentials_get_gid(LTTNG_OPTIONAL_GET_PTR(chan->buffer_credentials)), | |
2462 | LTTNG_DIRECTORY_HANDLE_SKIP_NON_EMPTY_FLAG); | |
ea853771 | 2463 | } |
b83e03c4 MD |
2464 | free(chan->stream_fds); |
2465 | } | |
2466 | ||
3bd1e081 MD |
2467 | void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream) |
2468 | { | |
a0377dfe FD |
2469 | LTTNG_ASSERT(stream); |
2470 | LTTNG_ASSERT(stream->ustream); | |
d41f73b7 | 2471 | |
ea88ca2a MD |
2472 | if (stream->chan->switch_timer_enabled == 1) { |
2473 | consumer_timer_switch_stop(stream->chan); | |
2474 | } | |
b623cb6a | 2475 | lttng_ust_ctl_destroy_stream(stream->ustream); |
ffe60014 | 2476 | } |
d41f73b7 | 2477 | |
6d574024 DG |
2478 | int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream) |
2479 | { | |
a0377dfe FD |
2480 | LTTNG_ASSERT(stream); |
2481 | LTTNG_ASSERT(stream->ustream); | |
6d574024 | 2482 | |
b623cb6a | 2483 | return lttng_ust_ctl_stream_get_wakeup_fd(stream->ustream); |
6d574024 DG |
2484 | } |
2485 | ||
2486 | int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream) | |
2487 | { | |
a0377dfe FD |
2488 | LTTNG_ASSERT(stream); |
2489 | LTTNG_ASSERT(stream->ustream); | |
6d574024 | 2490 | |
b623cb6a | 2491 | return lttng_ust_ctl_stream_close_wakeup_fd(stream->ustream); |
6d574024 DG |
2492 | } |
2493 | ||
94d49140 JD |
2494 | /* |
2495 | * Write up to one packet from the metadata cache to the channel. | |
2496 | * | |
577eea73 JG |
2497 | * Returns the number of bytes pushed from the cache into the ring buffer, or a |
2498 | * negative value on error. | |
94d49140 | 2499 | */ |
28ab034a | 2500 | static int commit_one_metadata_packet(struct lttng_consumer_stream *stream) |
94d49140 JD |
2501 | { |
2502 | ssize_t write_len; | |
2503 | int ret; | |
2504 | ||
2505 | pthread_mutex_lock(&stream->chan->metadata_cache->lock); | |
28ab034a | 2506 | if (stream->chan->metadata_cache->contents.size == stream->ust_metadata_pushed) { |
55954e07 JG |
2507 | /* |
2508 | * In the context of a user space metadata channel, a | |
2509 | * change in version can be detected in two ways: | |
2510 | * 1) During the pre-consume of the `read_subbuffer` loop, | |
2511 | * 2) When populating the metadata ring buffer (i.e. here). | |
2512 | * | |
2513 | * This function is invoked when there is no metadata | |
2514 | * available in the ring-buffer. If all data was consumed | |
2515 | * up to the size of the metadata cache, there is no metadata | |
2516 | * to insert in the ring-buffer. | |
2517 | * | |
2518 | * However, the metadata version could still have changed (a | |
2519 | * regeneration without any new data will yield the same cache | |
2520 | * size). | |
2521 | * | |
2522 | * The cache's version is checked for a version change and the | |
2523 | * consumed position is reset if one occurred. | |
2524 | * | |
2525 | * This check is only necessary for the user space domain as | |
2526 | * it has to manage the cache explicitly. If this reset was not | |
2527 | * performed, no metadata would be consumed (and no reset would | |
2528 | * occur as part of the pre-consume) until the metadata size | |
2529 | * exceeded the cache size. | |
2530 | */ | |
28ab034a | 2531 | if (stream->metadata_version != stream->chan->metadata_cache->version) { |
55954e07 JG |
2532 | metadata_stream_reset_cache_consumed_position(stream); |
2533 | consumer_stream_metadata_set_version(stream, | |
28ab034a | 2534 | stream->chan->metadata_cache->version); |
55954e07 JG |
2535 | } else { |
2536 | ret = 0; | |
2537 | goto end; | |
2538 | } | |
94d49140 JD |
2539 | } |
2540 | ||
28ab034a JG |
2541 | write_len = lttng_ust_ctl_write_one_packet_to_channel( |
2542 | stream->chan->uchan, | |
2543 | &stream->chan->metadata_cache->contents.data[stream->ust_metadata_pushed], | |
2544 | stream->chan->metadata_cache->contents.size - stream->ust_metadata_pushed); | |
a0377dfe | 2545 | LTTNG_ASSERT(write_len != 0); |
94d49140 JD |
2546 | if (write_len < 0) { |
2547 | ERR("Writing one metadata packet"); | |
f5ba75b4 | 2548 | ret = write_len; |
94d49140 JD |
2549 | goto end; |
2550 | } | |
2551 | stream->ust_metadata_pushed += write_len; | |
f40b76ae | 2552 | lttng_wait_queue_wake_all(&stream->chan->metadata_pushed_wait_queue); |
94d49140 | 2553 | |
28ab034a | 2554 | LTTNG_ASSERT(stream->chan->metadata_cache->contents.size >= stream->ust_metadata_pushed); |
94d49140 JD |
2555 | ret = write_len; |
2556 | ||
0d88e046 JG |
2557 | /* |
2558 | * Switch packet (but don't open the next one) on every commit of | |
2559 | * a metadata packet. Since the subbuffer is fully filled (with padding, | |
2560 | * if needed), the stream is "quiescent" after this commit. | |
2561 | */ | |
881fc67f | 2562 | if (lttng_ust_ctl_flush_buffer(stream->ustream, 1)) { |
edb555b5 | 2563 | ERR("Failed to flush buffer while committing one metadata packet"); |
881fc67f MD |
2564 | ret = -EIO; |
2565 | } else { | |
2566 | stream->quiescent = true; | |
2567 | } | |
94d49140 JD |
2568 | end: |
2569 | pthread_mutex_unlock(&stream->chan->metadata_cache->lock); | |
2570 | return ret; | |
2571 | } | |
2572 | ||
94d49140 JD |
2573 | /* |
2574 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
2575 | * metadata thread can consumer them. | |
2576 | * | |
c585821b MD |
2577 | * Metadata stream lock is held here, but we need to release it when |
2578 | * interacting with sessiond, else we cause a deadlock with live | |
2579 | * awaiting on metadata to be pushed out. | |
94d49140 | 2580 | * |
cdb72e4e | 2581 | * The RCU read side lock must be held by the caller. |
94d49140 | 2582 | */ |
28ab034a JG |
2583 | enum sync_metadata_status |
2584 | lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx, | |
2585 | struct lttng_consumer_stream *metadata_stream) | |
94d49140 JD |
2586 | { |
2587 | int ret; | |
577eea73 | 2588 | enum sync_metadata_status status; |
cdb72e4e | 2589 | struct lttng_consumer_channel *metadata_channel; |
94d49140 | 2590 | |
a0377dfe FD |
2591 | LTTNG_ASSERT(ctx); |
2592 | LTTNG_ASSERT(metadata_stream); | |
48b7cdc2 | 2593 | ASSERT_RCU_READ_LOCKED(); |
94d49140 | 2594 | |
cdb72e4e JG |
2595 | metadata_channel = metadata_stream->chan; |
2596 | pthread_mutex_unlock(&metadata_stream->lock); | |
94d49140 JD |
2597 | /* |
2598 | * Request metadata from the sessiond, but don't wait for the flush | |
2599 | * because we locked the metadata thread. | |
2600 | */ | |
f40b76ae | 2601 | ret = lttng_ustconsumer_request_metadata(ctx, metadata_channel, false, 0); |
cdb72e4e | 2602 | pthread_mutex_lock(&metadata_stream->lock); |
94d49140 | 2603 | if (ret < 0) { |
577eea73 | 2604 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
2605 | goto end; |
2606 | } | |
2607 | ||
cdb72e4e JG |
2608 | /* |
2609 | * The metadata stream and channel can be deleted while the | |
2610 | * metadata stream lock was released. The streamed is checked | |
2611 | * for deletion before we use it further. | |
2612 | * | |
2613 | * Note that it is safe to access a logically-deleted stream since its | |
2614 | * existence is still guaranteed by the RCU read side lock. However, | |
2615 | * it should no longer be used. The close/deletion of the metadata | |
2616 | * channel and stream already guarantees that all metadata has been | |
2617 | * consumed. Therefore, there is nothing left to do in this function. | |
2618 | */ | |
2619 | if (consumer_stream_is_deleted(metadata_stream)) { | |
2620 | DBG("Metadata stream %" PRIu64 " was deleted during the metadata synchronization", | |
28ab034a | 2621 | metadata_stream->key); |
577eea73 | 2622 | status = SYNC_METADATA_STATUS_NO_DATA; |
cdb72e4e JG |
2623 | goto end; |
2624 | } | |
2625 | ||
2626 | ret = commit_one_metadata_packet(metadata_stream); | |
577eea73 JG |
2627 | if (ret < 0) { |
2628 | status = SYNC_METADATA_STATUS_ERROR; | |
94d49140 JD |
2629 | goto end; |
2630 | } else if (ret > 0) { | |
577eea73 JG |
2631 | status = SYNC_METADATA_STATUS_NEW_DATA; |
2632 | } else /* ret == 0 */ { | |
2633 | status = SYNC_METADATA_STATUS_NO_DATA; | |
2634 | goto end; | |
94d49140 JD |
2635 | } |
2636 | ||
b623cb6a | 2637 | ret = lttng_ust_ctl_snapshot(metadata_stream->ustream); |
94d49140 | 2638 | if (ret < 0) { |
28ab034a JG |
2639 | ERR("Failed to take a snapshot of the metadata ring-buffer positions, ret = %d", |
2640 | ret); | |
577eea73 | 2641 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
2642 | goto end; |
2643 | } | |
2644 | ||
94d49140 | 2645 | end: |
577eea73 | 2646 | return status; |
94d49140 JD |
2647 | } |
2648 | ||
02b3d176 DG |
2649 | /* |
2650 | * Return 0 on success else a negative value. | |
2651 | */ | |
2652 | static int notify_if_more_data(struct lttng_consumer_stream *stream, | |
28ab034a | 2653 | struct lttng_consumer_local_data *ctx) |
02b3d176 DG |
2654 | { |
2655 | int ret; | |
b623cb6a | 2656 | struct lttng_ust_ctl_consumer_stream *ustream; |
02b3d176 | 2657 | |
a0377dfe FD |
2658 | LTTNG_ASSERT(stream); |
2659 | LTTNG_ASSERT(ctx); | |
02b3d176 DG |
2660 | |
2661 | ustream = stream->ustream; | |
2662 | ||
2663 | /* | |
2664 | * First, we are going to check if there is a new subbuffer available | |
2665 | * before reading the stream wait_fd. | |
2666 | */ | |
2667 | /* Get the next subbuffer */ | |
b623cb6a | 2668 | ret = lttng_ust_ctl_get_next_subbuf(ustream); |
02b3d176 DG |
2669 | if (ret) { |
2670 | /* No more data found, flag the stream. */ | |
2671 | stream->has_data = 0; | |
2672 | ret = 0; | |
2673 | goto end; | |
2674 | } | |
2675 | ||
b623cb6a | 2676 | ret = lttng_ust_ctl_put_subbuf(ustream); |
a0377dfe | 2677 | LTTNG_ASSERT(!ret); |
02b3d176 DG |
2678 | |
2679 | /* This stream still has data. Flag it and wake up the data thread. */ | |
2680 | stream->has_data = 1; | |
2681 | ||
2682 | if (stream->monitor && !stream->hangup_flush_done && !ctx->has_wakeup) { | |
2683 | ssize_t writelen; | |
2684 | ||
2685 | writelen = lttng_pipe_write(ctx->consumer_wakeup_pipe, "!", 1); | |
2686 | if (writelen < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { | |
2687 | ret = writelen; | |
2688 | goto end; | |
2689 | } | |
2690 | ||
2691 | /* The wake up pipe has been notified. */ | |
2692 | ctx->has_wakeup = 1; | |
2693 | } | |
2694 | ret = 0; | |
2695 | ||
2696 | end: | |
2697 | return ret; | |
2698 | } | |
2699 | ||
6f9449c2 | 2700 | static int consumer_stream_ust_on_wake_up(struct lttng_consumer_stream *stream) |
fb83fe64 | 2701 | { |
6f9449c2 | 2702 | int ret = 0; |
fb83fe64 | 2703 | |
fb83fe64 | 2704 | /* |
6f9449c2 JG |
2705 | * We can consume the 1 byte written into the wait_fd by |
2706 | * UST. Don't trigger error if we cannot read this one byte | |
2707 | * (read returns 0), or if the error is EAGAIN or EWOULDBLOCK. | |
2708 | * | |
2709 | * This is only done when the stream is monitored by a thread, | |
2710 | * before the flush is done after a hangup and if the stream | |
2711 | * is not flagged with data since there might be nothing to | |
2712 | * consume in the wait fd but still have data available | |
2713 | * flagged by the consumer wake up pipe. | |
fb83fe64 | 2714 | */ |
6f9449c2 JG |
2715 | if (stream->monitor && !stream->hangup_flush_done && !stream->has_data) { |
2716 | char dummy; | |
2717 | ssize_t readlen; | |
2718 | ||
2719 | readlen = lttng_read(stream->wait_fd, &dummy, 1); | |
2720 | if (readlen < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { | |
2721 | ret = readlen; | |
2722 | } | |
fb83fe64 | 2723 | } |
fb83fe64 | 2724 | |
6f9449c2 JG |
2725 | return ret; |
2726 | } | |
2727 | ||
2728 | static int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, | |
28ab034a | 2729 | struct stream_subbuffer *subbuf) |
6f9449c2 JG |
2730 | { |
2731 | int ret; | |
2732 | ||
28ab034a | 2733 | ret = lttng_ust_ctl_get_subbuf_size(stream->ustream, &subbuf->info.data.subbuf_size); |
6f9449c2 | 2734 | if (ret) { |
fb83fe64 JD |
2735 | goto end; |
2736 | } | |
6f9449c2 | 2737 | |
28ab034a JG |
2738 | ret = lttng_ust_ctl_get_padded_subbuf_size(stream->ustream, |
2739 | &subbuf->info.data.padded_subbuf_size); | |
6f9449c2 JG |
2740 | if (ret) { |
2741 | goto end; | |
fb83fe64 | 2742 | } |
fb83fe64 JD |
2743 | |
2744 | end: | |
2745 | return ret; | |
2746 | } | |
2747 | ||
6f9449c2 | 2748 | static int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
28ab034a | 2749 | struct stream_subbuffer *subbuf) |
d41f73b7 | 2750 | { |
6f9449c2 | 2751 | int ret; |
ffe60014 | 2752 | |
6f9449c2 JG |
2753 | ret = extract_common_subbuffer_info(stream, subbuf); |
2754 | if (ret) { | |
2755 | goto end; | |
2756 | } | |
d41f73b7 | 2757 | |
55954e07 | 2758 | subbuf->info.metadata.version = stream->metadata_version; |
ffe60014 | 2759 | |
6f9449c2 JG |
2760 | end: |
2761 | return ret; | |
2762 | } | |
d41f73b7 | 2763 | |
6f9449c2 | 2764 | static int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, |
28ab034a | 2765 | struct stream_subbuffer *subbuf) |
6f9449c2 JG |
2766 | { |
2767 | int ret; | |
c617c0c6 | 2768 | |
6f9449c2 JG |
2769 | ret = extract_common_subbuffer_info(stream, subbuf); |
2770 | if (ret) { | |
2771 | goto end; | |
02d02e31 JD |
2772 | } |
2773 | ||
28ab034a | 2774 | ret = lttng_ust_ctl_get_packet_size(stream->ustream, &subbuf->info.data.packet_size); |
6f9449c2 JG |
2775 | if (ret < 0) { |
2776 | PERROR("Failed to get sub-buffer packet size"); | |
2777 | goto end; | |
2778 | } | |
04ef1097 | 2779 | |
28ab034a | 2780 | ret = lttng_ust_ctl_get_content_size(stream->ustream, &subbuf->info.data.content_size); |
6f9449c2 JG |
2781 | if (ret < 0) { |
2782 | PERROR("Failed to get sub-buffer content size"); | |
2783 | goto end; | |
d41f73b7 | 2784 | } |
309167d2 | 2785 | |
28ab034a JG |
2786 | ret = lttng_ust_ctl_get_timestamp_begin(stream->ustream, |
2787 | &subbuf->info.data.timestamp_begin); | |
6f9449c2 JG |
2788 | if (ret < 0) { |
2789 | PERROR("Failed to get sub-buffer begin timestamp"); | |
2790 | goto end; | |
2791 | } | |
fb83fe64 | 2792 | |
28ab034a | 2793 | ret = lttng_ust_ctl_get_timestamp_end(stream->ustream, &subbuf->info.data.timestamp_end); |
6f9449c2 JG |
2794 | if (ret < 0) { |
2795 | PERROR("Failed to get sub-buffer end timestamp"); | |
2796 | goto end; | |
2797 | } | |
2798 | ||
28ab034a JG |
2799 | ret = lttng_ust_ctl_get_events_discarded(stream->ustream, |
2800 | &subbuf->info.data.events_discarded); | |
6f9449c2 JG |
2801 | if (ret) { |
2802 | PERROR("Failed to get sub-buffer events discarded count"); | |
2803 | goto end; | |
2804 | } | |
2805 | ||
b623cb6a | 2806 | ret = lttng_ust_ctl_get_sequence_number(stream->ustream, |
28ab034a | 2807 | &subbuf->info.data.sequence_number.value); |
6f9449c2 JG |
2808 | if (ret) { |
2809 | /* May not be supported by older LTTng-modules. */ | |
2810 | if (ret != -ENOTTY) { | |
2811 | PERROR("Failed to get sub-buffer sequence number"); | |
2812 | goto end; | |
fb83fe64 | 2813 | } |
1c20f0e2 | 2814 | } else { |
6f9449c2 | 2815 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
2816 | } |
2817 | ||
28ab034a | 2818 | ret = lttng_ust_ctl_get_stream_id(stream->ustream, &subbuf->info.data.stream_id); |
6f9449c2 JG |
2819 | if (ret < 0) { |
2820 | PERROR("Failed to get stream id"); | |
2821 | goto end; | |
2822 | } | |
1d4dfdef | 2823 | |
b623cb6a | 2824 | ret = lttng_ust_ctl_get_instance_id(stream->ustream, |
28ab034a | 2825 | &subbuf->info.data.stream_instance_id.value); |
6f9449c2 JG |
2826 | if (ret) { |
2827 | /* May not be supported by older LTTng-modules. */ | |
2828 | if (ret != -ENOTTY) { | |
2829 | PERROR("Failed to get stream instance id"); | |
2830 | goto end; | |
2831 | } | |
2832 | } else { | |
2833 | subbuf->info.data.stream_instance_id.is_set = true; | |
2834 | } | |
2835 | end: | |
2836 | return ret; | |
2837 | } | |
1d4dfdef | 2838 | |
6f9449c2 | 2839 | static int get_next_subbuffer_common(struct lttng_consumer_stream *stream, |
28ab034a | 2840 | struct stream_subbuffer *subbuffer) |
6f9449c2 JG |
2841 | { |
2842 | int ret; | |
2843 | const char *addr; | |
1d4dfdef | 2844 | |
28ab034a | 2845 | ret = stream->read_subbuffer_ops.extract_subbuffer_info(stream, subbuffer); |
6f9449c2 JG |
2846 | if (ret) { |
2847 | goto end; | |
2848 | } | |
02d02e31 | 2849 | |
6f9449c2 | 2850 | ret = get_current_subbuf_addr(stream, &addr); |
128708c3 | 2851 | if (ret) { |
6f9449c2 | 2852 | goto end; |
128708c3 JG |
2853 | } |
2854 | ||
28ab034a JG |
2855 | subbuffer->buffer.buffer = |
2856 | lttng_buffer_view_init(addr, 0, subbuffer->info.data.padded_subbuf_size); | |
cd9adb8b | 2857 | LTTNG_ASSERT(subbuffer->buffer.buffer.data != nullptr); |
6f9449c2 JG |
2858 | end: |
2859 | return ret; | |
2860 | } | |
fd424d99 | 2861 | |
28ab034a JG |
2862 | static enum get_next_subbuffer_status get_next_subbuffer(struct lttng_consumer_stream *stream, |
2863 | struct stream_subbuffer *subbuffer) | |
6f9449c2 JG |
2864 | { |
2865 | int ret; | |
b6797c8e | 2866 | enum get_next_subbuffer_status status; |
331744e3 | 2867 | |
b623cb6a | 2868 | ret = lttng_ust_ctl_get_next_subbuf(stream->ustream); |
b6797c8e JG |
2869 | switch (ret) { |
2870 | case 0: | |
2871 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
2872 | break; | |
2873 | case -ENODATA: | |
28ab034a | 2874 | case -EAGAIN: |
b6797c8e JG |
2875 | /* |
2876 | * The caller only expects -ENODATA when there is no data to | |
2877 | * read, but the kernel tracer returns -EAGAIN when there is | |
2878 | * currently no data for a non-finalized stream, and -ENODATA | |
2879 | * when there is no data for a finalized stream. Those can be | |
2880 | * combined into a -ENODATA return value. | |
2881 | */ | |
2882 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; | |
2883 | goto end; | |
2884 | default: | |
2885 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
6f9449c2 | 2886 | goto end; |
02b3d176 DG |
2887 | } |
2888 | ||
6f9449c2 JG |
2889 | ret = get_next_subbuffer_common(stream, subbuffer); |
2890 | if (ret) { | |
b6797c8e | 2891 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
23d56598 | 2892 | goto end; |
1c20f0e2 | 2893 | } |
6f9449c2 | 2894 | end: |
b6797c8e | 2895 | return status; |
6f9449c2 | 2896 | } |
1c20f0e2 | 2897 | |
28ab034a JG |
2898 | static enum get_next_subbuffer_status |
2899 | get_next_subbuffer_metadata(struct lttng_consumer_stream *stream, | |
2900 | struct stream_subbuffer *subbuffer) | |
6f9449c2 JG |
2901 | { |
2902 | int ret; | |
f5ba75b4 JG |
2903 | bool cache_empty; |
2904 | bool got_subbuffer; | |
2905 | bool coherent; | |
2906 | bool buffer_empty; | |
2907 | unsigned long consumed_pos, produced_pos; | |
b6797c8e | 2908 | enum get_next_subbuffer_status status; |
6f9449c2 | 2909 | |
f5ba75b4 | 2910 | do { |
b623cb6a | 2911 | ret = lttng_ust_ctl_get_next_subbuf(stream->ustream); |
f5ba75b4 JG |
2912 | if (ret == 0) { |
2913 | got_subbuffer = true; | |
2914 | } else { | |
2915 | got_subbuffer = false; | |
2916 | if (ret != -EAGAIN) { | |
2917 | /* Fatal error. */ | |
b6797c8e | 2918 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
f5ba75b4 JG |
2919 | goto end; |
2920 | } | |
c585821b MD |
2921 | } |
2922 | ||
f5ba75b4 JG |
2923 | /* |
2924 | * Determine if the cache is empty and ensure that a sub-buffer | |
2925 | * is made available if the cache is not empty. | |
2926 | */ | |
2927 | if (!got_subbuffer) { | |
2928 | ret = commit_one_metadata_packet(stream); | |
2929 | if (ret < 0 && ret != -ENOBUFS) { | |
b6797c8e | 2930 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
f5ba75b4 JG |
2931 | goto end; |
2932 | } else if (ret == 0) { | |
2933 | /* Not an error, the cache is empty. */ | |
2934 | cache_empty = true; | |
b6797c8e | 2935 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; |
f5ba75b4 JG |
2936 | goto end; |
2937 | } else { | |
2938 | cache_empty = false; | |
2939 | } | |
2940 | } else { | |
2941 | pthread_mutex_lock(&stream->chan->metadata_cache->lock); | |
9eac9828 | 2942 | cache_empty = stream->chan->metadata_cache->contents.size == |
28ab034a | 2943 | stream->ust_metadata_pushed; |
f5ba75b4 | 2944 | pthread_mutex_unlock(&stream->chan->metadata_cache->lock); |
94d49140 | 2945 | } |
f5ba75b4 | 2946 | } while (!got_subbuffer); |
94d49140 | 2947 | |
f5ba75b4 | 2948 | /* Populate sub-buffer infos and view. */ |
6f9449c2 JG |
2949 | ret = get_next_subbuffer_common(stream, subbuffer); |
2950 | if (ret) { | |
b6797c8e | 2951 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
6f9449c2 | 2952 | goto end; |
309167d2 | 2953 | } |
f5ba75b4 JG |
2954 | |
2955 | ret = lttng_ustconsumer_sample_snapshot_positions(stream); | |
2956 | if (ret < 0) { | |
2957 | /* | |
2958 | * -EAGAIN is not expected since we got a sub-buffer and haven't | |
2959 | * pushed the consumption position yet (on put_next). | |
2960 | */ | |
2961 | PERROR("Failed to take a snapshot of metadata buffer positions"); | |
b6797c8e | 2962 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
f5ba75b4 JG |
2963 | goto end; |
2964 | } | |
2965 | ||
2966 | ret = lttng_ustconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
2967 | if (ret) { | |
2968 | PERROR("Failed to get metadata consumed position"); | |
b6797c8e | 2969 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
f5ba75b4 JG |
2970 | goto end; |
2971 | } | |
2972 | ||
2973 | ret = lttng_ustconsumer_get_produced_snapshot(stream, &produced_pos); | |
2974 | if (ret) { | |
2975 | PERROR("Failed to get metadata produced position"); | |
b6797c8e | 2976 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
f5ba75b4 JG |
2977 | goto end; |
2978 | } | |
2979 | ||
2980 | /* Last sub-buffer of the ring buffer ? */ | |
2981 | buffer_empty = (consumed_pos + stream->max_sb_size) == produced_pos; | |
2982 | ||
2983 | /* | |
2984 | * The sessiond registry lock ensures that coherent units of metadata | |
2985 | * are pushed to the consumer daemon at once. Hence, if a sub-buffer is | |
2986 | * acquired, the cache is empty, and it is the only available sub-buffer | |
2987 | * available, it is safe to assume that it is "coherent". | |
2988 | */ | |
2989 | coherent = got_subbuffer && cache_empty && buffer_empty; | |
2990 | ||
2991 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
b6797c8e | 2992 | status = GET_NEXT_SUBBUFFER_STATUS_OK; |
23d56598 | 2993 | end: |
b6797c8e | 2994 | return status; |
d41f73b7 MD |
2995 | } |
2996 | ||
6f9449c2 | 2997 | static int put_next_subbuffer(struct lttng_consumer_stream *stream, |
28ab034a | 2998 | struct stream_subbuffer *subbuffer __attribute__((unused))) |
6f9449c2 | 2999 | { |
b623cb6a | 3000 | const int ret = lttng_ust_ctl_put_next_subbuf(stream->ustream); |
6f9449c2 | 3001 | |
a0377dfe | 3002 | LTTNG_ASSERT(ret == 0); |
6f9449c2 JG |
3003 | return ret; |
3004 | } | |
3005 | ||
3006 | static int signal_metadata(struct lttng_consumer_stream *stream, | |
28ab034a | 3007 | struct lttng_consumer_local_data *ctx __attribute__((unused))) |
6f9449c2 | 3008 | { |
8db3acaf | 3009 | ASSERT_LOCKED(stream->metadata_rdv_lock); |
6f9449c2 JG |
3010 | return pthread_cond_broadcast(&stream->metadata_rdv) ? -errno : 0; |
3011 | } | |
3012 | ||
28ab034a | 3013 | static int lttng_ustconsumer_set_stream_ops(struct lttng_consumer_stream *stream) |
6f9449c2 | 3014 | { |
f5ba75b4 JG |
3015 | int ret = 0; |
3016 | ||
6f9449c2 JG |
3017 | stream->read_subbuffer_ops.on_wake_up = consumer_stream_ust_on_wake_up; |
3018 | if (stream->metadata_flag) { | |
28ab034a JG |
3019 | stream->read_subbuffer_ops.get_next_subbuffer = get_next_subbuffer_metadata; |
3020 | stream->read_subbuffer_ops.extract_subbuffer_info = extract_metadata_subbuffer_info; | |
6f9449c2 | 3021 | stream->read_subbuffer_ops.reset_metadata = |
28ab034a | 3022 | metadata_stream_reset_cache_consumed_position; |
f5ba75b4 JG |
3023 | if (stream->chan->is_live) { |
3024 | stream->read_subbuffer_ops.on_sleep = signal_metadata; | |
28ab034a | 3025 | ret = consumer_stream_enable_metadata_bucketization(stream); |
f5ba75b4 JG |
3026 | if (ret) { |
3027 | goto end; | |
3028 | } | |
3029 | } | |
6f9449c2 | 3030 | } else { |
28ab034a JG |
3031 | stream->read_subbuffer_ops.get_next_subbuffer = get_next_subbuffer; |
3032 | stream->read_subbuffer_ops.extract_subbuffer_info = extract_data_subbuffer_info; | |
6f9449c2 JG |
3033 | stream->read_subbuffer_ops.on_sleep = notify_if_more_data; |
3034 | if (stream->chan->is_live) { | |
28ab034a | 3035 | stream->read_subbuffer_ops.send_live_beacon = consumer_flush_ust_index; |
6f9449c2 JG |
3036 | } |
3037 | } | |
3038 | ||
3039 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; | |
f5ba75b4 JG |
3040 | end: |
3041 | return ret; | |
6f9449c2 JG |
3042 | } |
3043 | ||
ffe60014 DG |
3044 | /* |
3045 | * Called when a stream is created. | |
fe4477ee JD |
3046 | * |
3047 | * Return 0 on success or else a negative value. | |
ffe60014 | 3048 | */ |
d41f73b7 MD |
3049 | int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream) |
3050 | { | |
fe4477ee JD |
3051 | int ret; |
3052 | ||
a0377dfe | 3053 | LTTNG_ASSERT(stream); |
10a50311 | 3054 | |
d2956687 JG |
3055 | /* |
3056 | * Don't create anything if this is set for streaming or if there is | |
3057 | * no current trace chunk on the parent channel. | |
3058 | */ | |
3059 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && | |
28ab034a | 3060 | stream->chan->trace_chunk) { |
d2956687 JG |
3061 | ret = consumer_stream_create_output_files(stream, true); |
3062 | if (ret) { | |
fe4477ee JD |
3063 | goto error; |
3064 | } | |
fe4477ee | 3065 | } |
6f9449c2 JG |
3066 | |
3067 | lttng_ustconsumer_set_stream_ops(stream); | |
fe4477ee JD |
3068 | ret = 0; |
3069 | ||
3070 | error: | |
3071 | return ret; | |
d41f73b7 | 3072 | } |
ca22feea DG |
3073 | |
3074 | /* | |
3075 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
3076 | * stream. Consumer data lock MUST be acquired before calling this function |
3077 | * and the stream lock. | |
ca22feea | 3078 | * |
6d805429 | 3079 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
3080 | * data is available for trace viewer reading. |
3081 | */ | |
6d805429 | 3082 | int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
3083 | { |
3084 | int ret; | |
3085 | ||
a0377dfe FD |
3086 | LTTNG_ASSERT(stream); |
3087 | LTTNG_ASSERT(stream->ustream); | |
b1316da1 | 3088 | ASSERT_LOCKED(stream->lock); |
ca22feea | 3089 | |
6d805429 | 3090 | DBG("UST consumer checking data pending"); |
c8f59ee5 | 3091 | |
ca6b395f MD |
3092 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
3093 | ret = 0; | |
3094 | goto end; | |
3095 | } | |
3096 | ||
04ef1097 | 3097 | if (stream->chan->type == CONSUMER_CHANNEL_TYPE_METADATA) { |
e6ee4eab DG |
3098 | uint64_t contiguous, pushed; |
3099 | ||
3100 | /* Ease our life a bit. */ | |
934ba8fd | 3101 | pthread_mutex_lock(&stream->chan->metadata_cache->lock); |
9eac9828 | 3102 | contiguous = stream->chan->metadata_cache->contents.size; |
934ba8fd | 3103 | pthread_mutex_unlock(&stream->chan->metadata_cache->lock); |
e6ee4eab DG |
3104 | pushed = stream->ust_metadata_pushed; |
3105 | ||
04ef1097 MD |
3106 | /* |
3107 | * We can simply check whether all contiguously available data | |
3108 | * has been pushed to the ring buffer, since the push operation | |
3109 | * is performed within get_next_subbuf(), and because both | |
3110 | * get_next_subbuf() and put_next_subbuf() are issued atomically | |
3111 | * thanks to the stream lock within | |
3112 | * lttng_ustconsumer_read_subbuffer(). This basically means that | |
3113 | * whetnever ust_metadata_pushed is incremented, the associated | |
3114 | * metadata has been consumed from the metadata stream. | |
3115 | */ | |
28ab034a JG |
3116 | DBG("UST consumer metadata pending check: contiguous %" PRIu64 |
3117 | " vs pushed %" PRIu64, | |
3118 | contiguous, | |
3119 | pushed); | |
a0377dfe | 3120 | LTTNG_ASSERT(((int64_t) (contiguous - pushed)) >= 0); |
e6ee4eab | 3121 | if ((contiguous != pushed) || |
28ab034a JG |
3122 | (((int64_t) contiguous - pushed) > 0 || contiguous == 0)) { |
3123 | ret = 1; /* Data is pending */ | |
04ef1097 MD |
3124 | goto end; |
3125 | } | |
3126 | } else { | |
b623cb6a | 3127 | ret = lttng_ust_ctl_get_next_subbuf(stream->ustream); |
04ef1097 MD |
3128 | if (ret == 0) { |
3129 | /* | |
3130 | * There is still data so let's put back this | |
3131 | * subbuffer. | |
3132 | */ | |
b623cb6a | 3133 | ret = lttng_ust_ctl_put_subbuf(stream->ustream); |
a0377dfe | 3134 | LTTNG_ASSERT(ret == 0); |
28ab034a | 3135 | ret = 1; /* Data is pending */ |
04ef1097 MD |
3136 | goto end; |
3137 | } | |
ca22feea DG |
3138 | } |
3139 | ||
6d805429 DG |
3140 | /* Data is NOT pending so ready to be read. */ |
3141 | ret = 0; | |
ca22feea | 3142 | |
6efae65e DG |
3143 | end: |
3144 | return ret; | |
ca22feea | 3145 | } |
d88aee68 | 3146 | |
6d574024 DG |
3147 | /* |
3148 | * Stop a given metadata channel timer if enabled and close the wait fd which | |
3149 | * is the poll pipe of the metadata stream. | |
3150 | * | |
d2c82a5a | 3151 | * This MUST be called with the metadata channel lock acquired. |
6d574024 DG |
3152 | */ |
3153 | void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata) | |
3154 | { | |
3155 | int ret; | |
3156 | ||
a0377dfe FD |
3157 | LTTNG_ASSERT(metadata); |
3158 | LTTNG_ASSERT(metadata->type == CONSUMER_CHANNEL_TYPE_METADATA); | |
6d574024 DG |
3159 | |
3160 | DBG("Closing metadata channel key %" PRIu64, metadata->key); | |
3161 | ||
3162 | if (metadata->switch_timer_enabled == 1) { | |
3163 | consumer_timer_switch_stop(metadata); | |
3164 | } | |
3165 | ||
3166 | if (!metadata->metadata_stream) { | |
3167 | goto end; | |
3168 | } | |
3169 | ||
3170 | /* | |
3171 | * Closing write side so the thread monitoring the stream wakes up if any | |
3172 | * and clean the metadata stream. | |
3173 | */ | |
3174 | if (metadata->metadata_stream->ust_metadata_poll_pipe[1] >= 0) { | |
3175 | ret = close(metadata->metadata_stream->ust_metadata_poll_pipe[1]); | |
3176 | if (ret < 0) { | |
3177 | PERROR("closing metadata pipe write side"); | |
3178 | } | |
3179 | metadata->metadata_stream->ust_metadata_poll_pipe[1] = -1; | |
3180 | } | |
3181 | ||
3182 | end: | |
3183 | return; | |
3184 | } | |
3185 | ||
d88aee68 DG |
3186 | /* |
3187 | * Close every metadata stream wait fd of the metadata hash table. This | |
3188 | * function MUST be used very carefully so not to run into a race between the | |
3189 | * metadata thread handling streams and this function closing their wait fd. | |
3190 | * | |
3191 | * For UST, this is used when the session daemon hangs up. Its the metadata | |
3192 | * producer so calling this is safe because we are assured that no state change | |
3193 | * can occur in the metadata thread for the streams in the hash table. | |
3194 | */ | |
6d574024 | 3195 | void lttng_ustconsumer_close_all_metadata(struct lttng_ht *metadata_ht) |
d88aee68 | 3196 | { |
d88aee68 DG |
3197 | struct lttng_ht_iter iter; |
3198 | struct lttng_consumer_stream *stream; | |
3199 | ||
a0377dfe FD |
3200 | LTTNG_ASSERT(metadata_ht); |
3201 | LTTNG_ASSERT(metadata_ht->ht); | |
d88aee68 DG |
3202 | |
3203 | DBG("UST consumer closing all metadata streams"); | |
3204 | ||
56047f5a JG |
3205 | { |
3206 | lttng::urcu::read_lock_guard read_lock; | |
9ce5646a | 3207 | |
56047f5a JG |
3208 | cds_lfht_for_each_entry (metadata_ht->ht, &iter.iter, stream, node.node) { |
3209 | health_code_update(); | |
3210 | ||
3211 | pthread_mutex_lock(&stream->chan->lock); | |
3212 | lttng_ustconsumer_close_metadata(stream->chan); | |
3213 | pthread_mutex_unlock(&stream->chan->lock); | |
3214 | } | |
d88aee68 | 3215 | } |
d88aee68 | 3216 | } |
d8ef542d MD |
3217 | |
3218 | void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream) | |
3219 | { | |
3220 | int ret; | |
3221 | ||
b623cb6a | 3222 | ret = lttng_ust_ctl_stream_close_wakeup_fd(stream->ustream); |
d8ef542d MD |
3223 | if (ret < 0) { |
3224 | ERR("Unable to close wakeup fd"); | |
3225 | } | |
3226 | } | |
331744e3 | 3227 | |
f666ae70 MD |
3228 | /* |
3229 | * Please refer to consumer-timer.c before adding any lock within this | |
3230 | * function or any of its callees. Timers have a very strict locking | |
3231 | * semantic with respect to teardown. Failure to respect this semantic | |
3232 | * introduces deadlocks. | |
c585821b MD |
3233 | * |
3234 | * DON'T hold the metadata lock when calling this function, else this | |
3235 | * can cause deadlock involving consumer awaiting for metadata to be | |
3236 | * pushed out due to concurrent interaction with the session daemon. | |
f666ae70 | 3237 | */ |
331744e3 | 3238 | int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx, |
28ab034a | 3239 | struct lttng_consumer_channel *channel, |
f40b76ae | 3240 | bool invoked_by_timer, |
28ab034a | 3241 | int wait) |
331744e3 JD |
3242 | { |
3243 | struct lttcomm_metadata_request_msg request; | |
3244 | struct lttcomm_consumer_msg msg; | |
0c759fc9 | 3245 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
93ec662e | 3246 | uint64_t len, key, offset, version; |
331744e3 JD |
3247 | int ret; |
3248 | ||
a0377dfe FD |
3249 | LTTNG_ASSERT(channel); |
3250 | LTTNG_ASSERT(channel->metadata_cache); | |
331744e3 | 3251 | |
53efb85a MD |
3252 | memset(&request, 0, sizeof(request)); |
3253 | ||
331744e3 | 3254 | /* send the metadata request to sessiond */ |
fa29bfbf | 3255 | switch (the_consumer_data.type) { |
331744e3 JD |
3256 | case LTTNG_CONSUMER64_UST: |
3257 | request.bits_per_long = 64; | |
3258 | break; | |
3259 | case LTTNG_CONSUMER32_UST: | |
3260 | request.bits_per_long = 32; | |
3261 | break; | |
3262 | default: | |
3263 | request.bits_per_long = 0; | |
3264 | break; | |
3265 | } | |
3266 | ||
3267 | request.session_id = channel->session_id; | |
1950109e | 3268 | request.session_id_per_pid = channel->session_id_per_pid; |
567eb353 DG |
3269 | /* |
3270 | * Request the application UID here so the metadata of that application can | |
3271 | * be sent back. The channel UID corresponds to the user UID of the session | |
3272 | * used for the rights on the stream file(s). | |
3273 | */ | |
3274 | request.uid = channel->ust_app_uid; | |
331744e3 | 3275 | request.key = channel->key; |
567eb353 | 3276 | |
28ab034a JG |
3277 | DBG("Sending metadata request to sessiond, session id %" PRIu64 ", per-pid %" PRIu64 |
3278 | ", app UID %u and channel key %" PRIu64, | |
3279 | request.session_id, | |
3280 | request.session_id_per_pid, | |
3281 | request.uid, | |
3282 | request.key); | |
331744e3 | 3283 | |
75d83e50 | 3284 | pthread_mutex_lock(&ctx->metadata_socket_lock); |
9ce5646a MD |
3285 | |
3286 | health_code_update(); | |
3287 | ||
28ab034a | 3288 | ret = lttcomm_send_unix_sock(ctx->consumer_metadata_socket, &request, sizeof(request)); |
331744e3 JD |
3289 | if (ret < 0) { |
3290 | ERR("Asking metadata to sessiond"); | |
3291 | goto end; | |
3292 | } | |
3293 | ||
9ce5646a MD |
3294 | health_code_update(); |
3295 | ||
331744e3 | 3296 | /* Receive the metadata from sessiond */ |
28ab034a | 3297 | ret = lttcomm_recv_unix_sock(ctx->consumer_metadata_socket, &msg, sizeof(msg)); |
331744e3 | 3298 | if (ret != sizeof(msg)) { |
28ab034a | 3299 | DBG("Consumer received unexpected message size %d (expects %zu)", ret, sizeof(msg)); |
331744e3 JD |
3300 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
3301 | /* | |
3302 | * The ret value might 0 meaning an orderly shutdown but this is ok | |
3303 | * since the caller handles this. | |
3304 | */ | |
3305 | goto end; | |
3306 | } | |
3307 | ||
9ce5646a MD |
3308 | health_code_update(); |
3309 | ||
331744e3 JD |
3310 | if (msg.cmd_type == LTTNG_ERR_UND) { |
3311 | /* No registry found */ | |
28ab034a | 3312 | (void) consumer_send_status_msg(ctx->consumer_metadata_socket, ret_code); |
331744e3 JD |
3313 | ret = 0; |
3314 | goto end; | |
3315 | } else if (msg.cmd_type != LTTNG_CONSUMER_PUSH_METADATA) { | |
3316 | ERR("Unexpected cmd_type received %d", msg.cmd_type); | |
3317 | ret = -1; | |
3318 | goto end; | |
3319 | } | |
3320 | ||
3321 | len = msg.u.push_metadata.len; | |
3322 | key = msg.u.push_metadata.key; | |
3323 | offset = msg.u.push_metadata.target_offset; | |
93ec662e | 3324 | version = msg.u.push_metadata.version; |
331744e3 | 3325 | |
a0377dfe | 3326 | LTTNG_ASSERT(key == channel->key); |
331744e3 JD |
3327 | if (len == 0) { |
3328 | DBG("No new metadata to receive for key %" PRIu64, key); | |
3329 | } | |
3330 | ||
9ce5646a MD |
3331 | health_code_update(); |
3332 | ||
331744e3 | 3333 | /* Tell session daemon we are ready to receive the metadata. */ |
28ab034a | 3334 | ret = consumer_send_status_msg(ctx->consumer_metadata_socket, LTTCOMM_CONSUMERD_SUCCESS); |
331744e3 JD |
3335 | if (ret < 0 || len == 0) { |
3336 | /* | |
3337 | * Somehow, the session daemon is not responding anymore or there is | |
3338 | * nothing to receive. | |
3339 | */ | |
3340 | goto end; | |
3341 | } | |
3342 | ||
9ce5646a MD |
3343 | health_code_update(); |
3344 | ||
f40b76ae JG |
3345 | ret = lttng_ustconsumer_recv_metadata(ctx->consumer_metadata_socket, |
3346 | key, | |
3347 | offset, | |
3348 | len, | |
3349 | version, | |
3350 | channel, | |
3351 | invoked_by_timer, | |
3352 | wait); | |
1eb682be | 3353 | if (ret >= 0) { |
f2a444f1 DG |
3354 | /* |
3355 | * Only send the status msg if the sessiond is alive meaning a positive | |
3356 | * ret code. | |
3357 | */ | |
1eb682be | 3358 | (void) consumer_send_status_msg(ctx->consumer_metadata_socket, ret); |
f2a444f1 | 3359 | } |
331744e3 JD |
3360 | ret = 0; |
3361 | ||
3362 | end: | |
9ce5646a MD |
3363 | health_code_update(); |
3364 | ||
75d83e50 | 3365 | pthread_mutex_unlock(&ctx->metadata_socket_lock); |
331744e3 JD |
3366 | return ret; |
3367 | } | |
70190e1c DG |
3368 | |
3369 | /* | |
3370 | * Return the ustctl call for the get stream id. | |
3371 | */ | |
28ab034a | 3372 | int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream, uint64_t *stream_id) |
70190e1c | 3373 | { |
a0377dfe FD |
3374 | LTTNG_ASSERT(stream); |
3375 | LTTNG_ASSERT(stream_id); | |
70190e1c | 3376 | |
b623cb6a | 3377 | return lttng_ust_ctl_get_stream_id(stream->ustream, stream_id); |
70190e1c | 3378 | } |
881fc67f MD |
3379 | |
3380 | void lttng_ustconsumer_sigbus_handle(void *addr) | |
3381 | { | |
3382 | lttng_ust_ctl_sigbus_handle(addr); | |
3383 | } |