Commit | Line | Data |
---|---|---|
3bd1e081 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
b3530820 | 4 | * Copyright (C) 2017 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
3bd1e081 | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
3bd1e081 MD |
9 | * |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
3bd1e081 MD |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
3bd1e081 | 21 | #include <assert.h> |
f02e1e8a | 22 | #include <lttng/ust-ctl.h> |
3bd1e081 MD |
23 | #include <poll.h> |
24 | #include <pthread.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <sys/mman.h> | |
28 | #include <sys/socket.h> | |
dbb5dfe6 | 29 | #include <sys/stat.h> |
3bd1e081 | 30 | #include <sys/types.h> |
77c7c900 | 31 | #include <inttypes.h> |
3bd1e081 | 32 | #include <unistd.h> |
ffe60014 | 33 | #include <urcu/list.h> |
331744e3 | 34 | #include <signal.h> |
02d02e31 | 35 | #include <stdbool.h> |
0857097f | 36 | |
51a9e1c7 | 37 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 38 | #include <common/common.h> |
10a8a223 | 39 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 40 | #include <common/relayd/relayd.h> |
dbb5dfe6 | 41 | #include <common/compat/fcntl.h> |
f263b7fd | 42 | #include <common/compat/endian.h> |
c8fea79c JR |
43 | #include <common/consumer/consumer-metadata-cache.h> |
44 | #include <common/consumer/consumer-stream.h> | |
45 | #include <common/consumer/consumer-timer.h> | |
fe4477ee | 46 | #include <common/utils.h> |
309167d2 | 47 | #include <common/index/index.h> |
10a8a223 DG |
48 | |
49 | #include "ust-consumer.h" | |
3bd1e081 | 50 | |
45863397 | 51 | #define INT_MAX_STR_LEN 12 /* includes \0 */ |
4628484a | 52 | |
3bd1e081 MD |
53 | extern struct lttng_consumer_global_data consumer_data; |
54 | extern int consumer_poll_timeout; | |
3bd1e081 MD |
55 | |
56 | /* | |
ffe60014 DG |
57 | * Free channel object and all streams associated with it. This MUST be used |
58 | * only and only if the channel has _NEVER_ been added to the global channel | |
59 | * hash table. | |
3bd1e081 | 60 | */ |
ffe60014 | 61 | static void destroy_channel(struct lttng_consumer_channel *channel) |
3bd1e081 | 62 | { |
ffe60014 DG |
63 | struct lttng_consumer_stream *stream, *stmp; |
64 | ||
65 | assert(channel); | |
66 | ||
67 | DBG("UST consumer cleaning stream list"); | |
68 | ||
69 | cds_list_for_each_entry_safe(stream, stmp, &channel->streams.head, | |
70 | send_node) { | |
9ce5646a MD |
71 | |
72 | health_code_update(); | |
73 | ||
ffe60014 DG |
74 | cds_list_del(&stream->send_node); |
75 | ustctl_destroy_stream(stream->ustream); | |
76 | free(stream); | |
77 | } | |
78 | ||
79 | /* | |
80 | * If a channel is available meaning that was created before the streams | |
81 | * were, delete it. | |
82 | */ | |
83 | if (channel->uchan) { | |
84 | lttng_ustconsumer_del_channel(channel); | |
b83e03c4 | 85 | lttng_ustconsumer_free_channel(channel); |
ffe60014 DG |
86 | } |
87 | free(channel); | |
88 | } | |
3bd1e081 MD |
89 | |
90 | /* | |
ffe60014 | 91 | * Add channel to internal consumer state. |
3bd1e081 | 92 | * |
ffe60014 | 93 | * Returns 0 on success or else a negative value. |
3bd1e081 | 94 | */ |
ffe60014 DG |
95 | static int add_channel(struct lttng_consumer_channel *channel, |
96 | struct lttng_consumer_local_data *ctx) | |
3bd1e081 MD |
97 | { |
98 | int ret = 0; | |
99 | ||
ffe60014 DG |
100 | assert(channel); |
101 | assert(ctx); | |
102 | ||
103 | if (ctx->on_recv_channel != NULL) { | |
104 | ret = ctx->on_recv_channel(channel); | |
105 | if (ret == 0) { | |
d8ef542d | 106 | ret = consumer_add_channel(channel, ctx); |
ffe60014 DG |
107 | } else if (ret < 0) { |
108 | /* Most likely an ENOMEM. */ | |
109 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
110 | goto error; | |
111 | } | |
112 | } else { | |
d8ef542d | 113 | ret = consumer_add_channel(channel, ctx); |
3bd1e081 MD |
114 | } |
115 | ||
d88aee68 | 116 | DBG("UST consumer channel added (key: %" PRIu64 ")", channel->key); |
ffe60014 DG |
117 | |
118 | error: | |
3bd1e081 MD |
119 | return ret; |
120 | } | |
121 | ||
122 | /* | |
ffe60014 DG |
123 | * Allocate and return a consumer channel object. |
124 | */ | |
125 | static struct lttng_consumer_channel *allocate_channel(uint64_t session_id, | |
126 | const char *pathname, const char *name, uid_t uid, gid_t gid, | |
da009f2c | 127 | uint64_t relayd_id, uint64_t key, enum lttng_event_output output, |
2bba9e53 | 128 | uint64_t tracefile_size, uint64_t tracefile_count, |
ecc48a90 | 129 | uint64_t session_id_per_pid, unsigned int monitor, |
d7ba1388 | 130 | unsigned int live_timer_interval, |
3d071855 | 131 | const char *root_shm_path, const char *shm_path) |
ffe60014 DG |
132 | { |
133 | assert(pathname); | |
134 | assert(name); | |
135 | ||
1950109e JD |
136 | return consumer_allocate_channel(key, session_id, pathname, name, uid, |
137 | gid, relayd_id, output, tracefile_size, | |
d7ba1388 | 138 | tracefile_count, session_id_per_pid, monitor, |
3d071855 | 139 | live_timer_interval, root_shm_path, shm_path); |
ffe60014 DG |
140 | } |
141 | ||
142 | /* | |
143 | * Allocate and return a consumer stream object. If _alloc_ret is not NULL, the | |
144 | * error value if applicable is set in it else it is kept untouched. | |
3bd1e081 | 145 | * |
ffe60014 | 146 | * Return NULL on error else the newly allocated stream object. |
3bd1e081 | 147 | */ |
ffe60014 DG |
148 | static struct lttng_consumer_stream *allocate_stream(int cpu, int key, |
149 | struct lttng_consumer_channel *channel, | |
150 | struct lttng_consumer_local_data *ctx, int *_alloc_ret) | |
151 | { | |
152 | int alloc_ret; | |
153 | struct lttng_consumer_stream *stream = NULL; | |
154 | ||
155 | assert(channel); | |
156 | assert(ctx); | |
157 | ||
158 | stream = consumer_allocate_stream(channel->key, | |
159 | key, | |
160 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
161 | channel->name, | |
162 | channel->uid, | |
163 | channel->gid, | |
164 | channel->relayd_id, | |
165 | channel->session_id, | |
166 | cpu, | |
167 | &alloc_ret, | |
4891ece8 DG |
168 | channel->type, |
169 | channel->monitor); | |
ffe60014 DG |
170 | if (stream == NULL) { |
171 | switch (alloc_ret) { | |
172 | case -ENOENT: | |
173 | /* | |
174 | * We could not find the channel. Can happen if cpu hotplug | |
175 | * happens while tearing down. | |
176 | */ | |
177 | DBG3("Could not find channel"); | |
178 | break; | |
179 | case -ENOMEM: | |
180 | case -EINVAL: | |
181 | default: | |
182 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
183 | break; | |
184 | } | |
185 | goto error; | |
186 | } | |
187 | ||
d9a2e16e | 188 | consumer_stream_update_channel_attributes(stream, channel); |
ffe60014 DG |
189 | stream->chan = channel; |
190 | ||
191 | error: | |
192 | if (_alloc_ret) { | |
193 | *_alloc_ret = alloc_ret; | |
194 | } | |
195 | return stream; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Send the given stream pointer to the corresponding thread. | |
200 | * | |
201 | * Returns 0 on success else a negative value. | |
202 | */ | |
203 | static int send_stream_to_thread(struct lttng_consumer_stream *stream, | |
204 | struct lttng_consumer_local_data *ctx) | |
205 | { | |
dae10966 DG |
206 | int ret; |
207 | struct lttng_pipe *stream_pipe; | |
ffe60014 DG |
208 | |
209 | /* Get the right pipe where the stream will be sent. */ | |
210 | if (stream->metadata_flag) { | |
66d583dc | 211 | consumer_add_metadata_stream(stream); |
dae10966 | 212 | stream_pipe = ctx->consumer_metadata_pipe; |
ffe60014 | 213 | } else { |
66d583dc | 214 | consumer_add_data_stream(stream); |
dae10966 | 215 | stream_pipe = ctx->consumer_data_pipe; |
ffe60014 DG |
216 | } |
217 | ||
5ab66908 MD |
218 | /* |
219 | * From this point on, the stream's ownership has been moved away from | |
a8086cf4 JR |
220 | * the channel and it becomes globally visible. Hence, remove it from |
221 | * the local stream list to prevent the stream from being both local and | |
222 | * global. | |
5ab66908 MD |
223 | */ |
224 | stream->globally_visible = 1; | |
a8086cf4 | 225 | cds_list_del(&stream->send_node); |
5ab66908 | 226 | |
dae10966 | 227 | ret = lttng_pipe_write(stream_pipe, &stream, sizeof(stream)); |
ffe60014 | 228 | if (ret < 0) { |
dae10966 DG |
229 | ERR("Consumer write %s stream to pipe %d", |
230 | stream->metadata_flag ? "metadata" : "data", | |
231 | lttng_pipe_get_writefd(stream_pipe)); | |
5ab66908 MD |
232 | if (stream->metadata_flag) { |
233 | consumer_del_stream_for_metadata(stream); | |
234 | } else { | |
235 | consumer_del_stream_for_data(stream); | |
236 | } | |
a8086cf4 | 237 | goto error; |
ffe60014 | 238 | } |
a8086cf4 | 239 | |
5ab66908 | 240 | error: |
ffe60014 DG |
241 | return ret; |
242 | } | |
243 | ||
4628484a MD |
244 | static |
245 | int get_stream_shm_path(char *stream_shm_path, const char *shm_path, int cpu) | |
246 | { | |
45863397 | 247 | char cpu_nr[INT_MAX_STR_LEN]; /* int max len */ |
4628484a MD |
248 | int ret; |
249 | ||
250 | strncpy(stream_shm_path, shm_path, PATH_MAX); | |
251 | stream_shm_path[PATH_MAX - 1] = '\0'; | |
45863397 | 252 | ret = snprintf(cpu_nr, INT_MAX_STR_LEN, "%i", cpu); |
67f8cb8d MD |
253 | if (ret < 0) { |
254 | PERROR("snprintf"); | |
4628484a MD |
255 | goto end; |
256 | } | |
257 | strncat(stream_shm_path, cpu_nr, | |
258 | PATH_MAX - strlen(stream_shm_path) - 1); | |
259 | ret = 0; | |
260 | end: | |
261 | return ret; | |
262 | } | |
263 | ||
d88aee68 DG |
264 | /* |
265 | * Create streams for the given channel using liblttng-ust-ctl. | |
266 | * | |
267 | * Return 0 on success else a negative value. | |
268 | */ | |
ffe60014 DG |
269 | static int create_ust_streams(struct lttng_consumer_channel *channel, |
270 | struct lttng_consumer_local_data *ctx) | |
271 | { | |
272 | int ret, cpu = 0; | |
273 | struct ustctl_consumer_stream *ustream; | |
274 | struct lttng_consumer_stream *stream; | |
275 | ||
276 | assert(channel); | |
277 | assert(ctx); | |
278 | ||
279 | /* | |
280 | * While a stream is available from ustctl. When NULL is returned, we've | |
281 | * reached the end of the possible stream for the channel. | |
282 | */ | |
283 | while ((ustream = ustctl_create_stream(channel->uchan, cpu))) { | |
284 | int wait_fd; | |
04ef1097 | 285 | int ust_metadata_pipe[2]; |
ffe60014 | 286 | |
9ce5646a MD |
287 | health_code_update(); |
288 | ||
04ef1097 MD |
289 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA && channel->monitor) { |
290 | ret = utils_create_pipe_cloexec_nonblock(ust_metadata_pipe); | |
291 | if (ret < 0) { | |
292 | ERR("Create ust metadata poll pipe"); | |
293 | goto error; | |
294 | } | |
295 | wait_fd = ust_metadata_pipe[0]; | |
296 | } else { | |
297 | wait_fd = ustctl_stream_get_wait_fd(ustream); | |
298 | } | |
ffe60014 DG |
299 | |
300 | /* Allocate consumer stream object. */ | |
301 | stream = allocate_stream(cpu, wait_fd, channel, ctx, &ret); | |
302 | if (!stream) { | |
303 | goto error_alloc; | |
304 | } | |
305 | stream->ustream = ustream; | |
306 | /* | |
307 | * Store it so we can save multiple function calls afterwards since | |
308 | * this value is used heavily in the stream threads. This is UST | |
309 | * specific so this is why it's done after allocation. | |
310 | */ | |
311 | stream->wait_fd = wait_fd; | |
312 | ||
b31398bb DG |
313 | /* |
314 | * Increment channel refcount since the channel reference has now been | |
315 | * assigned in the allocation process above. | |
316 | */ | |
10a50311 JD |
317 | if (stream->chan->monitor) { |
318 | uatomic_inc(&stream->chan->refcount); | |
319 | } | |
b31398bb | 320 | |
ffe60014 DG |
321 | /* |
322 | * Order is important this is why a list is used. On error, the caller | |
323 | * should clean this list. | |
324 | */ | |
325 | cds_list_add_tail(&stream->send_node, &channel->streams.head); | |
326 | ||
327 | ret = ustctl_get_max_subbuf_size(stream->ustream, | |
328 | &stream->max_sb_size); | |
329 | if (ret < 0) { | |
330 | ERR("ustctl_get_max_subbuf_size failed for stream %s", | |
331 | stream->name); | |
332 | goto error; | |
333 | } | |
334 | ||
335 | /* Do actions once stream has been received. */ | |
336 | if (ctx->on_recv_stream) { | |
337 | ret = ctx->on_recv_stream(stream); | |
338 | if (ret < 0) { | |
339 | goto error; | |
340 | } | |
341 | } | |
342 | ||
d88aee68 | 343 | DBG("UST consumer add stream %s (key: %" PRIu64 ") with relayd id %" PRIu64, |
ffe60014 DG |
344 | stream->name, stream->key, stream->relayd_stream_id); |
345 | ||
346 | /* Set next CPU stream. */ | |
347 | channel->streams.count = ++cpu; | |
d88aee68 DG |
348 | |
349 | /* Keep stream reference when creating metadata. */ | |
350 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) { | |
351 | channel->metadata_stream = stream; | |
8de4f941 JG |
352 | if (channel->monitor) { |
353 | /* Set metadata poll pipe if we created one */ | |
354 | memcpy(stream->ust_metadata_poll_pipe, | |
355 | ust_metadata_pipe, | |
356 | sizeof(ust_metadata_pipe)); | |
357 | } | |
d88aee68 | 358 | } |
ffe60014 DG |
359 | } |
360 | ||
361 | return 0; | |
362 | ||
363 | error: | |
364 | error_alloc: | |
365 | return ret; | |
366 | } | |
367 | ||
4628484a MD |
368 | /* |
369 | * create_posix_shm is never called concurrently within a process. | |
370 | */ | |
371 | static | |
372 | int create_posix_shm(void) | |
373 | { | |
374 | char tmp_name[NAME_MAX]; | |
375 | int shmfd, ret; | |
376 | ||
377 | ret = snprintf(tmp_name, NAME_MAX, "/ust-shm-consumer-%d", getpid()); | |
378 | if (ret < 0) { | |
379 | PERROR("snprintf"); | |
380 | return -1; | |
381 | } | |
382 | /* | |
383 | * Allocate shm, and immediately unlink its shm oject, keeping | |
384 | * only the file descriptor as a reference to the object. | |
385 | * We specifically do _not_ use the / at the beginning of the | |
386 | * pathname so that some OS implementations can keep it local to | |
387 | * the process (POSIX leaves this implementation-defined). | |
388 | */ | |
389 | shmfd = shm_open(tmp_name, O_CREAT | O_EXCL | O_RDWR, 0700); | |
390 | if (shmfd < 0) { | |
391 | PERROR("shm_open"); | |
392 | goto error_shm_open; | |
393 | } | |
394 | ret = shm_unlink(tmp_name); | |
395 | if (ret < 0 && errno != ENOENT) { | |
396 | PERROR("shm_unlink"); | |
397 | goto error_shm_release; | |
398 | } | |
399 | return shmfd; | |
400 | ||
401 | error_shm_release: | |
402 | ret = close(shmfd); | |
403 | if (ret) { | |
404 | PERROR("close"); | |
405 | } | |
406 | error_shm_open: | |
407 | return -1; | |
408 | } | |
409 | ||
410 | static int open_ust_stream_fd(struct lttng_consumer_channel *channel, | |
411 | struct ustctl_consumer_channel_attr *attr, | |
412 | int cpu) | |
413 | { | |
414 | char shm_path[PATH_MAX]; | |
415 | int ret; | |
416 | ||
417 | if (!channel->shm_path[0]) { | |
418 | return create_posix_shm(); | |
419 | } | |
420 | ret = get_stream_shm_path(shm_path, channel->shm_path, cpu); | |
421 | if (ret) { | |
422 | goto error_shm_path; | |
423 | } | |
424 | return run_as_open(shm_path, | |
425 | O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR, | |
426 | channel->uid, channel->gid); | |
427 | ||
428 | error_shm_path: | |
429 | return -1; | |
430 | } | |
431 | ||
ffe60014 DG |
432 | /* |
433 | * Create an UST channel with the given attributes and send it to the session | |
434 | * daemon using the ust ctl API. | |
435 | * | |
436 | * Return 0 on success or else a negative value. | |
437 | */ | |
4628484a MD |
438 | static int create_ust_channel(struct lttng_consumer_channel *channel, |
439 | struct ustctl_consumer_channel_attr *attr, | |
440 | struct ustctl_consumer_channel **ust_chanp) | |
ffe60014 | 441 | { |
4628484a MD |
442 | int ret, nr_stream_fds, i, j; |
443 | int *stream_fds; | |
444 | struct ustctl_consumer_channel *ust_channel; | |
ffe60014 | 445 | |
4628484a | 446 | assert(channel); |
ffe60014 | 447 | assert(attr); |
4628484a | 448 | assert(ust_chanp); |
ffe60014 DG |
449 | |
450 | DBG3("Creating channel to ustctl with attr: [overwrite: %d, " | |
451 | "subbuf_size: %" PRIu64 ", num_subbuf: %" PRIu64 ", " | |
452 | "switch_timer_interval: %u, read_timer_interval: %u, " | |
453 | "output: %d, type: %d", attr->overwrite, attr->subbuf_size, | |
454 | attr->num_subbuf, attr->switch_timer_interval, | |
455 | attr->read_timer_interval, attr->output, attr->type); | |
456 | ||
4628484a MD |
457 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA) |
458 | nr_stream_fds = 1; | |
459 | else | |
460 | nr_stream_fds = ustctl_get_nr_stream_per_channel(); | |
461 | stream_fds = zmalloc(nr_stream_fds * sizeof(*stream_fds)); | |
462 | if (!stream_fds) { | |
463 | ret = -1; | |
464 | goto error_alloc; | |
465 | } | |
466 | for (i = 0; i < nr_stream_fds; i++) { | |
467 | stream_fds[i] = open_ust_stream_fd(channel, attr, i); | |
468 | if (stream_fds[i] < 0) { | |
469 | ret = -1; | |
470 | goto error_open; | |
471 | } | |
472 | } | |
473 | ust_channel = ustctl_create_channel(attr, stream_fds, nr_stream_fds); | |
474 | if (!ust_channel) { | |
ffe60014 DG |
475 | ret = -1; |
476 | goto error_create; | |
477 | } | |
4628484a MD |
478 | channel->nr_stream_fds = nr_stream_fds; |
479 | channel->stream_fds = stream_fds; | |
480 | *ust_chanp = ust_channel; | |
ffe60014 DG |
481 | |
482 | return 0; | |
483 | ||
484 | error_create: | |
4628484a MD |
485 | error_open: |
486 | for (j = i - 1; j >= 0; j--) { | |
487 | int closeret; | |
488 | ||
489 | closeret = close(stream_fds[j]); | |
490 | if (closeret) { | |
491 | PERROR("close"); | |
492 | } | |
493 | if (channel->shm_path[0]) { | |
494 | char shm_path[PATH_MAX]; | |
495 | ||
496 | closeret = get_stream_shm_path(shm_path, | |
497 | channel->shm_path, j); | |
498 | if (closeret) { | |
499 | ERR("Cannot get stream shm path"); | |
500 | } | |
501 | closeret = run_as_unlink(shm_path, | |
502 | channel->uid, channel->gid); | |
503 | if (closeret) { | |
4628484a MD |
504 | PERROR("unlink %s", shm_path); |
505 | } | |
506 | } | |
507 | } | |
508 | /* Try to rmdir all directories under shm_path root. */ | |
509 | if (channel->root_shm_path[0]) { | |
602766ec | 510 | (void) run_as_rmdir_recursive(channel->root_shm_path, |
4628484a MD |
511 | channel->uid, channel->gid); |
512 | } | |
513 | free(stream_fds); | |
514 | error_alloc: | |
ffe60014 DG |
515 | return ret; |
516 | } | |
517 | ||
d88aee68 DG |
518 | /* |
519 | * Send a single given stream to the session daemon using the sock. | |
520 | * | |
521 | * Return 0 on success else a negative value. | |
522 | */ | |
ffe60014 DG |
523 | static int send_sessiond_stream(int sock, struct lttng_consumer_stream *stream) |
524 | { | |
525 | int ret; | |
526 | ||
527 | assert(stream); | |
528 | assert(sock >= 0); | |
529 | ||
3eb914c0 | 530 | DBG("UST consumer sending stream %" PRIu64 " to sessiond", stream->key); |
ffe60014 DG |
531 | |
532 | /* Send stream to session daemon. */ | |
533 | ret = ustctl_send_stream_to_sessiond(sock, stream->ustream); | |
534 | if (ret < 0) { | |
535 | goto error; | |
536 | } | |
537 | ||
ffe60014 DG |
538 | error: |
539 | return ret; | |
540 | } | |
541 | ||
542 | /* | |
543 | * Send channel to sessiond. | |
544 | * | |
d88aee68 | 545 | * Return 0 on success or else a negative value. |
ffe60014 DG |
546 | */ |
547 | static int send_sessiond_channel(int sock, | |
548 | struct lttng_consumer_channel *channel, | |
549 | struct lttng_consumer_local_data *ctx, int *relayd_error) | |
550 | { | |
0c759fc9 | 551 | int ret, ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
ffe60014 | 552 | struct lttng_consumer_stream *stream; |
a4baae1b | 553 | uint64_t net_seq_idx = -1ULL; |
ffe60014 DG |
554 | |
555 | assert(channel); | |
556 | assert(ctx); | |
557 | assert(sock >= 0); | |
558 | ||
559 | DBG("UST consumer sending channel %s to sessiond", channel->name); | |
560 | ||
62285ea4 DG |
561 | if (channel->relayd_id != (uint64_t) -1ULL) { |
562 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { | |
9ce5646a MD |
563 | |
564 | health_code_update(); | |
565 | ||
62285ea4 DG |
566 | /* Try to send the stream to the relayd if one is available. */ |
567 | ret = consumer_send_relayd_stream(stream, stream->chan->pathname); | |
568 | if (ret < 0) { | |
569 | /* | |
570 | * Flag that the relayd was the problem here probably due to a | |
571 | * communicaton error on the socket. | |
572 | */ | |
573 | if (relayd_error) { | |
574 | *relayd_error = 1; | |
575 | } | |
725d28b2 | 576 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
ffe60014 | 577 | } |
a4baae1b JD |
578 | if (net_seq_idx == -1ULL) { |
579 | net_seq_idx = stream->net_seq_idx; | |
580 | } | |
581 | } | |
f2a444f1 | 582 | } |
ffe60014 | 583 | |
f2a444f1 DG |
584 | /* Inform sessiond that we are about to send channel and streams. */ |
585 | ret = consumer_send_status_msg(sock, ret_code); | |
0c759fc9 | 586 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
f2a444f1 DG |
587 | /* |
588 | * Either the session daemon is not responding or the relayd died so we | |
589 | * stop now. | |
590 | */ | |
591 | goto error; | |
592 | } | |
593 | ||
594 | /* Send channel to sessiond. */ | |
595 | ret = ustctl_send_channel_to_sessiond(sock, channel->uchan); | |
596 | if (ret < 0) { | |
597 | goto error; | |
598 | } | |
599 | ||
600 | ret = ustctl_channel_close_wakeup_fd(channel->uchan); | |
601 | if (ret < 0) { | |
602 | goto error; | |
603 | } | |
604 | ||
605 | /* The channel was sent successfully to the sessiond at this point. */ | |
606 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { | |
9ce5646a MD |
607 | |
608 | health_code_update(); | |
609 | ||
ffe60014 DG |
610 | /* Send stream to session daemon. */ |
611 | ret = send_sessiond_stream(sock, stream); | |
612 | if (ret < 0) { | |
613 | goto error; | |
614 | } | |
615 | } | |
616 | ||
617 | /* Tell sessiond there is no more stream. */ | |
618 | ret = ustctl_send_stream_to_sessiond(sock, NULL); | |
619 | if (ret < 0) { | |
620 | goto error; | |
621 | } | |
622 | ||
623 | DBG("UST consumer NULL stream sent to sessiond"); | |
624 | ||
625 | return 0; | |
626 | ||
627 | error: | |
0c759fc9 | 628 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
f2a444f1 DG |
629 | ret = -1; |
630 | } | |
ffe60014 DG |
631 | return ret; |
632 | } | |
633 | ||
634 | /* | |
635 | * Creates a channel and streams and add the channel it to the channel internal | |
636 | * state. The created stream must ONLY be sent once the GET_CHANNEL command is | |
637 | * received. | |
638 | * | |
639 | * Return 0 on success or else, a negative value is returned and the channel | |
640 | * MUST be destroyed by consumer_del_channel(). | |
641 | */ | |
642 | static int ask_channel(struct lttng_consumer_local_data *ctx, int sock, | |
643 | struct lttng_consumer_channel *channel, | |
644 | struct ustctl_consumer_channel_attr *attr) | |
3bd1e081 MD |
645 | { |
646 | int ret; | |
647 | ||
ffe60014 DG |
648 | assert(ctx); |
649 | assert(channel); | |
650 | assert(attr); | |
651 | ||
652 | /* | |
653 | * This value is still used by the kernel consumer since for the kernel, | |
654 | * the stream ownership is not IN the consumer so we need to have the | |
655 | * number of left stream that needs to be initialized so we can know when | |
656 | * to delete the channel (see consumer.c). | |
657 | * | |
658 | * As for the user space tracer now, the consumer creates and sends the | |
659 | * stream to the session daemon which only sends them to the application | |
660 | * once every stream of a channel is received making this value useless | |
661 | * because we they will be added to the poll thread before the application | |
662 | * receives them. This ensures that a stream can not hang up during | |
663 | * initilization of a channel. | |
664 | */ | |
665 | channel->nb_init_stream_left = 0; | |
666 | ||
667 | /* The reply msg status is handled in the following call. */ | |
4628484a | 668 | ret = create_ust_channel(channel, attr, &channel->uchan); |
ffe60014 | 669 | if (ret < 0) { |
10a50311 | 670 | goto end; |
3bd1e081 MD |
671 | } |
672 | ||
d8ef542d MD |
673 | channel->wait_fd = ustctl_channel_get_wait_fd(channel->uchan); |
674 | ||
10a50311 JD |
675 | /* |
676 | * For the snapshots (no monitor), we create the metadata streams | |
677 | * on demand, not during the channel creation. | |
678 | */ | |
679 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA && !channel->monitor) { | |
680 | ret = 0; | |
681 | goto end; | |
682 | } | |
683 | ||
ffe60014 DG |
684 | /* Open all streams for this channel. */ |
685 | ret = create_ust_streams(channel, ctx); | |
686 | if (ret < 0) { | |
10a50311 | 687 | goto end; |
ffe60014 DG |
688 | } |
689 | ||
10a50311 | 690 | end: |
3bd1e081 MD |
691 | return ret; |
692 | } | |
693 | ||
d88aee68 DG |
694 | /* |
695 | * Send all stream of a channel to the right thread handling it. | |
696 | * | |
697 | * On error, return a negative value else 0 on success. | |
698 | */ | |
699 | static int send_streams_to_thread(struct lttng_consumer_channel *channel, | |
700 | struct lttng_consumer_local_data *ctx) | |
701 | { | |
702 | int ret = 0; | |
703 | struct lttng_consumer_stream *stream, *stmp; | |
704 | ||
705 | assert(channel); | |
706 | assert(ctx); | |
707 | ||
708 | /* Send streams to the corresponding thread. */ | |
709 | cds_list_for_each_entry_safe(stream, stmp, &channel->streams.head, | |
710 | send_node) { | |
9ce5646a MD |
711 | |
712 | health_code_update(); | |
713 | ||
d88aee68 DG |
714 | /* Sending the stream to the thread. */ |
715 | ret = send_stream_to_thread(stream, ctx); | |
716 | if (ret < 0) { | |
717 | /* | |
718 | * If we are unable to send the stream to the thread, there is | |
719 | * a big problem so just stop everything. | |
720 | */ | |
721 | goto error; | |
722 | } | |
d88aee68 DG |
723 | } |
724 | ||
725 | error: | |
726 | return ret; | |
727 | } | |
728 | ||
7972aab2 DG |
729 | /* |
730 | * Flush channel's streams using the given key to retrieve the channel. | |
731 | * | |
732 | * Return 0 on success else an LTTng error code. | |
733 | */ | |
734 | static int flush_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 | ||
8fd623e0 | 742 | DBG("UST consumer flush channel key %" PRIu64, chan_key); |
7972aab2 | 743 | |
a500c257 | 744 | rcu_read_lock(); |
7972aab2 DG |
745 | channel = consumer_find_channel(chan_key); |
746 | if (!channel) { | |
8fd623e0 | 747 | ERR("UST consumer flush channel %" PRIu64 " not found", chan_key); |
7972aab2 DG |
748 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
749 | goto error; | |
750 | } | |
751 | ||
752 | ht = consumer_data.stream_per_chan_id_ht; | |
753 | ||
754 | /* For each stream of the channel id, flush it. */ | |
7972aab2 DG |
755 | cds_lfht_for_each_entry_duplicate(ht->ht, |
756 | ht->hash_fct(&channel->key, lttng_ht_seed), ht->match_fct, | |
757 | &channel->key, &iter.iter, stream, node_channel_id.node) { | |
9ce5646a MD |
758 | |
759 | health_code_update(); | |
760 | ||
0dd01979 MD |
761 | pthread_mutex_lock(&stream->lock); |
762 | if (!stream->quiescent) { | |
763 | ustctl_flush_buffer(stream->ustream, 0); | |
764 | stream->quiescent = true; | |
765 | } | |
766 | pthread_mutex_unlock(&stream->lock); | |
767 | } | |
768 | error: | |
769 | rcu_read_unlock(); | |
770 | return ret; | |
771 | } | |
772 | ||
773 | /* | |
774 | * Clear quiescent state from channel's streams using the given key to | |
775 | * retrieve the channel. | |
776 | * | |
777 | * Return 0 on success else an LTTng error code. | |
778 | */ | |
779 | static int clear_quiescent_channel(uint64_t chan_key) | |
780 | { | |
781 | int ret = 0; | |
782 | struct lttng_consumer_channel *channel; | |
783 | struct lttng_consumer_stream *stream; | |
784 | struct lttng_ht *ht; | |
785 | struct lttng_ht_iter iter; | |
786 | ||
787 | DBG("UST consumer clear quiescent channel key %" PRIu64, chan_key); | |
788 | ||
789 | rcu_read_lock(); | |
790 | channel = consumer_find_channel(chan_key); | |
791 | if (!channel) { | |
792 | ERR("UST consumer clear quiescent channel %" PRIu64 " not found", chan_key); | |
793 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
794 | goto error; | |
795 | } | |
796 | ||
797 | ht = consumer_data.stream_per_chan_id_ht; | |
798 | ||
799 | /* For each stream of the channel id, clear quiescent state. */ | |
800 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
801 | ht->hash_fct(&channel->key, lttng_ht_seed), ht->match_fct, | |
802 | &channel->key, &iter.iter, stream, node_channel_id.node) { | |
803 | ||
804 | health_code_update(); | |
805 | ||
806 | pthread_mutex_lock(&stream->lock); | |
807 | stream->quiescent = false; | |
808 | pthread_mutex_unlock(&stream->lock); | |
7972aab2 | 809 | } |
7972aab2 | 810 | error: |
a500c257 | 811 | rcu_read_unlock(); |
7972aab2 DG |
812 | return ret; |
813 | } | |
814 | ||
d88aee68 DG |
815 | /* |
816 | * Close metadata stream wakeup_fd using the given key to retrieve the channel. | |
a500c257 | 817 | * RCU read side lock MUST be acquired before calling this function. |
d88aee68 DG |
818 | * |
819 | * Return 0 on success else an LTTng error code. | |
820 | */ | |
821 | static int close_metadata(uint64_t chan_key) | |
822 | { | |
ea88ca2a | 823 | int ret = 0; |
d88aee68 | 824 | struct lttng_consumer_channel *channel; |
f65a74be | 825 | unsigned int channel_monitor; |
d88aee68 | 826 | |
8fd623e0 | 827 | DBG("UST consumer close metadata key %" PRIu64, chan_key); |
d88aee68 DG |
828 | |
829 | channel = consumer_find_channel(chan_key); | |
830 | if (!channel) { | |
84cc9aa0 DG |
831 | /* |
832 | * This is possible if the metadata thread has issue a delete because | |
833 | * the endpoint point of the stream hung up. There is no way the | |
834 | * session daemon can know about it thus use a DBG instead of an actual | |
835 | * error. | |
836 | */ | |
837 | DBG("UST consumer close metadata %" PRIu64 " not found", chan_key); | |
d88aee68 DG |
838 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
839 | goto error; | |
840 | } | |
841 | ||
ea88ca2a | 842 | pthread_mutex_lock(&consumer_data.lock); |
a9838785 | 843 | pthread_mutex_lock(&channel->lock); |
f65a74be | 844 | channel_monitor = channel->monitor; |
73811ecc DG |
845 | if (cds_lfht_is_node_deleted(&channel->node.node)) { |
846 | goto error_unlock; | |
847 | } | |
848 | ||
6d574024 | 849 | lttng_ustconsumer_close_metadata(channel); |
f65a74be JG |
850 | pthread_mutex_unlock(&channel->lock); |
851 | pthread_mutex_unlock(&consumer_data.lock); | |
d88aee68 | 852 | |
f65a74be JG |
853 | /* |
854 | * The ownership of a metadata channel depends on the type of | |
855 | * session to which it belongs. In effect, the monitor flag is checked | |
856 | * to determine if this metadata channel is in "snapshot" mode or not. | |
857 | * | |
858 | * In the non-snapshot case, the metadata channel is created along with | |
859 | * a single stream which will remain present until the metadata channel | |
860 | * is destroyed (on the destruction of its session). In this case, the | |
861 | * metadata stream in "monitored" by the metadata poll thread and holds | |
862 | * the ownership of its channel. | |
863 | * | |
864 | * Closing the metadata will cause the metadata stream's "metadata poll | |
865 | * pipe" to be closed. Closing this pipe will wake-up the metadata poll | |
866 | * thread which will teardown the metadata stream which, in return, | |
867 | * deletes the metadata channel. | |
868 | * | |
869 | * In the snapshot case, the metadata stream is created and destroyed | |
870 | * on every snapshot record. Since the channel doesn't have an owner | |
871 | * other than the session daemon, it is safe to destroy it immediately | |
872 | * on reception of the CLOSE_METADATA command. | |
873 | */ | |
874 | if (!channel_monitor) { | |
875 | /* | |
876 | * The channel and consumer_data locks must be | |
877 | * released before this call since consumer_del_channel | |
878 | * re-acquires the channel and consumer_data locks to teardown | |
879 | * the channel and queue its reclamation by the "call_rcu" | |
880 | * worker thread. | |
881 | */ | |
882 | consumer_del_channel(channel); | |
883 | } | |
884 | ||
885 | return ret; | |
ea88ca2a | 886 | error_unlock: |
a9838785 | 887 | pthread_mutex_unlock(&channel->lock); |
ea88ca2a | 888 | pthread_mutex_unlock(&consumer_data.lock); |
d88aee68 DG |
889 | error: |
890 | return ret; | |
891 | } | |
892 | ||
893 | /* | |
894 | * RCU read side lock MUST be acquired before calling this function. | |
895 | * | |
896 | * Return 0 on success else an LTTng error code. | |
897 | */ | |
898 | static int setup_metadata(struct lttng_consumer_local_data *ctx, uint64_t key) | |
899 | { | |
900 | int ret; | |
901 | struct lttng_consumer_channel *metadata; | |
902 | ||
8fd623e0 | 903 | DBG("UST consumer setup metadata key %" PRIu64, key); |
d88aee68 DG |
904 | |
905 | metadata = consumer_find_channel(key); | |
906 | if (!metadata) { | |
907 | ERR("UST consumer push metadata %" PRIu64 " not found", key); | |
908 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
10a50311 JD |
909 | goto end; |
910 | } | |
911 | ||
912 | /* | |
913 | * In no monitor mode, the metadata channel has no stream(s) so skip the | |
914 | * ownership transfer to the metadata thread. | |
915 | */ | |
916 | if (!metadata->monitor) { | |
917 | DBG("Metadata channel in no monitor"); | |
918 | ret = 0; | |
919 | goto end; | |
d88aee68 DG |
920 | } |
921 | ||
922 | /* | |
923 | * Send metadata stream to relayd if one available. Availability is | |
924 | * known if the stream is still in the list of the channel. | |
925 | */ | |
926 | if (cds_list_empty(&metadata->streams.head)) { | |
927 | ERR("Metadata channel key %" PRIu64 ", no stream available.", key); | |
928 | ret = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
f5a0c9cf | 929 | goto error_no_stream; |
d88aee68 DG |
930 | } |
931 | ||
932 | /* Send metadata stream to relayd if needed. */ | |
62285ea4 DG |
933 | if (metadata->metadata_stream->net_seq_idx != (uint64_t) -1ULL) { |
934 | ret = consumer_send_relayd_stream(metadata->metadata_stream, | |
935 | metadata->pathname); | |
936 | if (ret < 0) { | |
937 | ret = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
938 | goto error; | |
939 | } | |
601262d6 JD |
940 | ret = consumer_send_relayd_streams_sent( |
941 | metadata->metadata_stream->net_seq_idx); | |
942 | if (ret < 0) { | |
943 | ret = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
944 | goto error; | |
945 | } | |
d88aee68 DG |
946 | } |
947 | ||
a8086cf4 JR |
948 | /* |
949 | * Ownership of metadata stream is passed along. Freeing is handled by | |
950 | * the callee. | |
951 | */ | |
d88aee68 DG |
952 | ret = send_streams_to_thread(metadata, ctx); |
953 | if (ret < 0) { | |
954 | /* | |
955 | * If we are unable to send the stream to the thread, there is | |
956 | * a big problem so just stop everything. | |
957 | */ | |
958 | ret = LTTCOMM_CONSUMERD_FATAL; | |
a8086cf4 | 959 | goto send_streams_error; |
d88aee68 DG |
960 | } |
961 | /* List MUST be empty after or else it could be reused. */ | |
962 | assert(cds_list_empty(&metadata->streams.head)); | |
963 | ||
10a50311 JD |
964 | ret = 0; |
965 | goto end; | |
d88aee68 DG |
966 | |
967 | error: | |
f2a444f1 DG |
968 | /* |
969 | * Delete metadata channel on error. At this point, the metadata stream can | |
970 | * NOT be monitored by the metadata thread thus having the guarantee that | |
971 | * the stream is still in the local stream list of the channel. This call | |
972 | * will make sure to clean that list. | |
973 | */ | |
f5a0c9cf | 974 | consumer_stream_destroy(metadata->metadata_stream, NULL); |
212d67a2 DG |
975 | cds_list_del(&metadata->metadata_stream->send_node); |
976 | metadata->metadata_stream = NULL; | |
a8086cf4 | 977 | send_streams_error: |
f5a0c9cf | 978 | error_no_stream: |
10a50311 JD |
979 | end: |
980 | return ret; | |
981 | } | |
982 | ||
983 | /* | |
984 | * Snapshot the whole metadata. | |
985 | * | |
986 | * Returns 0 on success, < 0 on error | |
987 | */ | |
988 | static int snapshot_metadata(uint64_t key, char *path, uint64_t relayd_id, | |
989 | struct lttng_consumer_local_data *ctx) | |
990 | { | |
991 | int ret = 0; | |
10a50311 JD |
992 | struct lttng_consumer_channel *metadata_channel; |
993 | struct lttng_consumer_stream *metadata_stream; | |
994 | ||
995 | assert(path); | |
996 | assert(ctx); | |
997 | ||
998 | DBG("UST consumer snapshot metadata with key %" PRIu64 " at path %s", | |
999 | key, path); | |
1000 | ||
1001 | rcu_read_lock(); | |
1002 | ||
1003 | metadata_channel = consumer_find_channel(key); | |
1004 | if (!metadata_channel) { | |
6a00837f MD |
1005 | ERR("UST snapshot metadata channel not found for key %" PRIu64, |
1006 | key); | |
10a50311 JD |
1007 | ret = -1; |
1008 | goto error; | |
1009 | } | |
1010 | assert(!metadata_channel->monitor); | |
1011 | ||
9ce5646a MD |
1012 | health_code_update(); |
1013 | ||
10a50311 JD |
1014 | /* |
1015 | * Ask the sessiond if we have new metadata waiting and update the | |
1016 | * consumer metadata cache. | |
1017 | */ | |
94d49140 | 1018 | ret = lttng_ustconsumer_request_metadata(ctx, metadata_channel, 0, 1); |
10a50311 JD |
1019 | if (ret < 0) { |
1020 | goto error; | |
1021 | } | |
1022 | ||
9ce5646a MD |
1023 | health_code_update(); |
1024 | ||
10a50311 JD |
1025 | /* |
1026 | * The metadata stream is NOT created in no monitor mode when the channel | |
1027 | * is created on a sessiond ask channel command. | |
1028 | */ | |
1029 | ret = create_ust_streams(metadata_channel, ctx); | |
1030 | if (ret < 0) { | |
1031 | goto error; | |
1032 | } | |
1033 | ||
1034 | metadata_stream = metadata_channel->metadata_stream; | |
1035 | assert(metadata_stream); | |
1036 | ||
1037 | if (relayd_id != (uint64_t) -1ULL) { | |
1038 | metadata_stream->net_seq_idx = relayd_id; | |
1039 | ret = consumer_send_relayd_stream(metadata_stream, path); | |
1040 | if (ret < 0) { | |
1041 | goto error_stream; | |
1042 | } | |
1043 | } else { | |
1044 | ret = utils_create_stream_file(path, metadata_stream->name, | |
1045 | metadata_stream->chan->tracefile_size, | |
1046 | metadata_stream->tracefile_count_current, | |
309167d2 | 1047 | metadata_stream->uid, metadata_stream->gid, NULL); |
10a50311 JD |
1048 | if (ret < 0) { |
1049 | goto error_stream; | |
1050 | } | |
1051 | metadata_stream->out_fd = ret; | |
1052 | metadata_stream->tracefile_size_current = 0; | |
1053 | } | |
1054 | ||
04ef1097 | 1055 | do { |
9ce5646a MD |
1056 | health_code_update(); |
1057 | ||
10a50311 JD |
1058 | ret = lttng_consumer_read_subbuffer(metadata_stream, ctx); |
1059 | if (ret < 0) { | |
94d49140 | 1060 | goto error_stream; |
10a50311 | 1061 | } |
04ef1097 | 1062 | } while (ret > 0); |
10a50311 | 1063 | |
10a50311 JD |
1064 | error_stream: |
1065 | /* | |
1066 | * Clean up the stream completly because the next snapshot will use a new | |
1067 | * metadata stream. | |
1068 | */ | |
10a50311 | 1069 | consumer_stream_destroy(metadata_stream, NULL); |
212d67a2 | 1070 | cds_list_del(&metadata_stream->send_node); |
10a50311 JD |
1071 | metadata_channel->metadata_stream = NULL; |
1072 | ||
1073 | error: | |
1074 | rcu_read_unlock(); | |
1075 | return ret; | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * Take a snapshot of all the stream of a channel. | |
1080 | * | |
1081 | * Returns 0 on success, < 0 on error | |
1082 | */ | |
1083 | static int snapshot_channel(uint64_t key, char *path, uint64_t relayd_id, | |
d07ceecd | 1084 | uint64_t nb_packets_per_stream, struct lttng_consumer_local_data *ctx) |
10a50311 JD |
1085 | { |
1086 | int ret; | |
1087 | unsigned use_relayd = 0; | |
1088 | unsigned long consumed_pos, produced_pos; | |
1089 | struct lttng_consumer_channel *channel; | |
1090 | struct lttng_consumer_stream *stream; | |
1091 | ||
1092 | assert(path); | |
1093 | assert(ctx); | |
1094 | ||
1095 | rcu_read_lock(); | |
1096 | ||
1097 | if (relayd_id != (uint64_t) -1ULL) { | |
1098 | use_relayd = 1; | |
1099 | } | |
1100 | ||
1101 | channel = consumer_find_channel(key); | |
1102 | if (!channel) { | |
6a00837f | 1103 | ERR("UST snapshot channel not found for key %" PRIu64, key); |
10a50311 JD |
1104 | ret = -1; |
1105 | goto error; | |
1106 | } | |
1107 | assert(!channel->monitor); | |
6a00837f | 1108 | DBG("UST consumer snapshot channel %" PRIu64, key); |
10a50311 JD |
1109 | |
1110 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { | |
9ce5646a MD |
1111 | health_code_update(); |
1112 | ||
10a50311 JD |
1113 | /* Lock stream because we are about to change its state. */ |
1114 | pthread_mutex_lock(&stream->lock); | |
1115 | stream->net_seq_idx = relayd_id; | |
1116 | ||
1117 | if (use_relayd) { | |
1118 | ret = consumer_send_relayd_stream(stream, path); | |
1119 | if (ret < 0) { | |
1120 | goto error_unlock; | |
1121 | } | |
1122 | } else { | |
1123 | ret = utils_create_stream_file(path, stream->name, | |
1124 | stream->chan->tracefile_size, | |
1125 | stream->tracefile_count_current, | |
309167d2 | 1126 | stream->uid, stream->gid, NULL); |
10a50311 JD |
1127 | if (ret < 0) { |
1128 | goto error_unlock; | |
1129 | } | |
1130 | stream->out_fd = ret; | |
1131 | stream->tracefile_size_current = 0; | |
1132 | ||
1133 | DBG("UST consumer snapshot stream %s/%s (%" PRIu64 ")", path, | |
1134 | stream->name, stream->key); | |
1135 | } | |
1136 | ||
d4d80f77 MD |
1137 | /* |
1138 | * If tracing is active, we want to perform a "full" buffer flush. | |
1139 | * Else, if quiescent, it has already been done by the prior stop. | |
1140 | */ | |
1141 | if (!stream->quiescent) { | |
1142 | ustctl_flush_buffer(stream->ustream, 0); | |
1143 | } | |
10a50311 JD |
1144 | |
1145 | ret = lttng_ustconsumer_take_snapshot(stream); | |
1146 | if (ret < 0) { | |
1147 | ERR("Taking UST snapshot"); | |
1148 | goto error_unlock; | |
1149 | } | |
1150 | ||
1151 | ret = lttng_ustconsumer_get_produced_snapshot(stream, &produced_pos); | |
1152 | if (ret < 0) { | |
1153 | ERR("Produced UST snapshot position"); | |
1154 | goto error_unlock; | |
1155 | } | |
1156 | ||
1157 | ret = lttng_ustconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
1158 | if (ret < 0) { | |
1159 | ERR("Consumerd UST snapshot position"); | |
1160 | goto error_unlock; | |
1161 | } | |
1162 | ||
5c786ded JD |
1163 | /* |
1164 | * The original value is sent back if max stream size is larger than | |
d07ceecd | 1165 | * the possible size of the snapshot. Also, we assume that the session |
5c786ded JD |
1166 | * daemon should never send a maximum stream size that is lower than |
1167 | * subbuffer size. | |
1168 | */ | |
d07ceecd MD |
1169 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
1170 | produced_pos, nb_packets_per_stream, | |
1171 | stream->max_sb_size); | |
5c786ded | 1172 | |
10a50311 JD |
1173 | while (consumed_pos < produced_pos) { |
1174 | ssize_t read_len; | |
1175 | unsigned long len, padded_len; | |
1176 | ||
9ce5646a MD |
1177 | health_code_update(); |
1178 | ||
10a50311 JD |
1179 | DBG("UST consumer taking snapshot at pos %lu", consumed_pos); |
1180 | ||
1181 | ret = ustctl_get_subbuf(stream->ustream, &consumed_pos); | |
1182 | if (ret < 0) { | |
1183 | if (ret != -EAGAIN) { | |
1184 | PERROR("ustctl_get_subbuf snapshot"); | |
1185 | goto error_close_stream; | |
1186 | } | |
1187 | DBG("UST consumer get subbuf failed. Skipping it."); | |
1188 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 1189 | stream->chan->lost_packets++; |
10a50311 JD |
1190 | continue; |
1191 | } | |
1192 | ||
1193 | ret = ustctl_get_subbuf_size(stream->ustream, &len); | |
1194 | if (ret < 0) { | |
1195 | ERR("Snapshot ustctl_get_subbuf_size"); | |
1196 | goto error_put_subbuf; | |
1197 | } | |
1198 | ||
1199 | ret = ustctl_get_padded_subbuf_size(stream->ustream, &padded_len); | |
1200 | if (ret < 0) { | |
1201 | ERR("Snapshot ustctl_get_padded_subbuf_size"); | |
1202 | goto error_put_subbuf; | |
1203 | } | |
1204 | ||
1205 | read_len = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, len, | |
309167d2 | 1206 | padded_len - len, NULL); |
10a50311 JD |
1207 | if (use_relayd) { |
1208 | if (read_len != len) { | |
56591bac | 1209 | ret = -EPERM; |
10a50311 JD |
1210 | goto error_put_subbuf; |
1211 | } | |
1212 | } else { | |
1213 | if (read_len != padded_len) { | |
56591bac | 1214 | ret = -EPERM; |
10a50311 JD |
1215 | goto error_put_subbuf; |
1216 | } | |
1217 | } | |
1218 | ||
1219 | ret = ustctl_put_subbuf(stream->ustream); | |
1220 | if (ret < 0) { | |
1221 | ERR("Snapshot ustctl_put_subbuf"); | |
1222 | goto error_close_stream; | |
1223 | } | |
1224 | consumed_pos += stream->max_sb_size; | |
1225 | } | |
1226 | ||
1227 | /* Simply close the stream so we can use it on the next snapshot. */ | |
1228 | consumer_stream_close(stream); | |
1229 | pthread_mutex_unlock(&stream->lock); | |
1230 | } | |
1231 | ||
1232 | rcu_read_unlock(); | |
1233 | return 0; | |
1234 | ||
1235 | error_put_subbuf: | |
1236 | if (ustctl_put_subbuf(stream->ustream) < 0) { | |
1237 | ERR("Snapshot ustctl_put_subbuf"); | |
1238 | } | |
1239 | error_close_stream: | |
1240 | consumer_stream_close(stream); | |
1241 | error_unlock: | |
1242 | pthread_mutex_unlock(&stream->lock); | |
1243 | error: | |
1244 | rcu_read_unlock(); | |
d88aee68 DG |
1245 | return ret; |
1246 | } | |
1247 | ||
331744e3 | 1248 | /* |
c585821b MD |
1249 | * Receive the metadata updates from the sessiond. Supports receiving |
1250 | * overlapping metadata, but is needs to always belong to a contiguous | |
1251 | * range starting from 0. | |
1252 | * Be careful about the locks held when calling this function: it needs | |
1253 | * the metadata cache flush to concurrently progress in order to | |
1254 | * complete. | |
331744e3 JD |
1255 | */ |
1256 | int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset, | |
93ec662e JD |
1257 | uint64_t len, uint64_t version, |
1258 | struct lttng_consumer_channel *channel, int timer, int wait) | |
331744e3 | 1259 | { |
0c759fc9 | 1260 | int ret, ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
331744e3 JD |
1261 | char *metadata_str; |
1262 | ||
8fd623e0 | 1263 | DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len); |
331744e3 JD |
1264 | |
1265 | metadata_str = zmalloc(len * sizeof(char)); | |
1266 | if (!metadata_str) { | |
1267 | PERROR("zmalloc metadata string"); | |
1268 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; | |
1269 | goto end; | |
1270 | } | |
1271 | ||
9ce5646a MD |
1272 | health_code_update(); |
1273 | ||
331744e3 JD |
1274 | /* Receive metadata string. */ |
1275 | ret = lttcomm_recv_unix_sock(sock, metadata_str, len); | |
1276 | if (ret < 0) { | |
1277 | /* Session daemon is dead so return gracefully. */ | |
1278 | ret_code = ret; | |
1279 | goto end_free; | |
1280 | } | |
1281 | ||
9ce5646a MD |
1282 | health_code_update(); |
1283 | ||
331744e3 | 1284 | pthread_mutex_lock(&channel->metadata_cache->lock); |
93ec662e JD |
1285 | ret = consumer_metadata_cache_write(channel, offset, len, version, |
1286 | metadata_str); | |
331744e3 JD |
1287 | if (ret < 0) { |
1288 | /* Unable to handle metadata. Notify session daemon. */ | |
1289 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
a32bd775 DG |
1290 | /* |
1291 | * Skip metadata flush on write error since the offset and len might | |
1292 | * not have been updated which could create an infinite loop below when | |
1293 | * waiting for the metadata cache to be flushed. | |
1294 | */ | |
1295 | pthread_mutex_unlock(&channel->metadata_cache->lock); | |
a32bd775 | 1296 | goto end_free; |
331744e3 JD |
1297 | } |
1298 | pthread_mutex_unlock(&channel->metadata_cache->lock); | |
1299 | ||
94d49140 JD |
1300 | if (!wait) { |
1301 | goto end_free; | |
1302 | } | |
5e41ebe1 | 1303 | while (consumer_metadata_cache_flushed(channel, offset + len, timer)) { |
331744e3 | 1304 | DBG("Waiting for metadata to be flushed"); |
9ce5646a MD |
1305 | |
1306 | health_code_update(); | |
1307 | ||
331744e3 JD |
1308 | usleep(DEFAULT_METADATA_AVAILABILITY_WAIT_TIME); |
1309 | } | |
1310 | ||
1311 | end_free: | |
1312 | free(metadata_str); | |
1313 | end: | |
1314 | return ret_code; | |
1315 | } | |
1316 | ||
4cbc1a04 DG |
1317 | /* |
1318 | * Receive command from session daemon and process it. | |
1319 | * | |
1320 | * Return 1 on success else a negative value or 0. | |
1321 | */ | |
3bd1e081 MD |
1322 | int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
1323 | int sock, struct pollfd *consumer_sockpoll) | |
1324 | { | |
1325 | ssize_t ret; | |
0c759fc9 | 1326 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 | 1327 | struct lttcomm_consumer_msg msg; |
ffe60014 | 1328 | struct lttng_consumer_channel *channel = NULL; |
3bd1e081 | 1329 | |
9ce5646a MD |
1330 | health_code_update(); |
1331 | ||
3bd1e081 MD |
1332 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
1333 | if (ret != sizeof(msg)) { | |
173af62f DG |
1334 | DBG("Consumer received unexpected message size %zd (expects %zu)", |
1335 | ret, sizeof(msg)); | |
3be74084 DG |
1336 | /* |
1337 | * The ret value might 0 meaning an orderly shutdown but this is ok | |
1338 | * since the caller handles this. | |
1339 | */ | |
489f70e9 | 1340 | if (ret > 0) { |
c6857fcf | 1341 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
489f70e9 MD |
1342 | ret = -1; |
1343 | } | |
3bd1e081 MD |
1344 | return ret; |
1345 | } | |
9ce5646a MD |
1346 | |
1347 | health_code_update(); | |
1348 | ||
84382d49 MD |
1349 | /* deprecated */ |
1350 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 1351 | |
9ce5646a MD |
1352 | health_code_update(); |
1353 | ||
3f8e211f | 1354 | /* relayd needs RCU read-side lock */ |
b0b335c8 MD |
1355 | rcu_read_lock(); |
1356 | ||
3bd1e081 | 1357 | switch (msg.cmd_type) { |
00e2e675 DG |
1358 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
1359 | { | |
f50f23d9 | 1360 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 1361 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 1362 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 JD |
1363 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
1364 | msg.u.relayd_sock.relayd_session_id); | |
00e2e675 DG |
1365 | goto end_nosignal; |
1366 | } | |
173af62f DG |
1367 | case LTTNG_CONSUMER_DESTROY_RELAYD: |
1368 | { | |
a6ba4fe1 | 1369 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
173af62f DG |
1370 | struct consumer_relayd_sock_pair *relayd; |
1371 | ||
a6ba4fe1 | 1372 | DBG("UST consumer destroying relayd %" PRIu64, index); |
173af62f DG |
1373 | |
1374 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 1375 | relayd = consumer_find_relayd(index); |
173af62f | 1376 | if (relayd == NULL) { |
3448e266 | 1377 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 1378 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
173af62f DG |
1379 | } |
1380 | ||
a6ba4fe1 DG |
1381 | /* |
1382 | * Each relayd socket pair has a refcount of stream attached to it | |
1383 | * which tells if the relayd is still active or not depending on the | |
1384 | * refcount value. | |
1385 | * | |
1386 | * This will set the destroy flag of the relayd object and destroy it | |
1387 | * if the refcount reaches zero when called. | |
1388 | * | |
1389 | * The destroy can happen either here or when a stream fd hangs up. | |
1390 | */ | |
f50f23d9 DG |
1391 | if (relayd) { |
1392 | consumer_flag_relayd_for_destroy(relayd); | |
1393 | } | |
1394 | ||
d88aee68 | 1395 | goto end_msg_sessiond; |
173af62f | 1396 | } |
3bd1e081 MD |
1397 | case LTTNG_CONSUMER_UPDATE_STREAM: |
1398 | { | |
3f8e211f | 1399 | rcu_read_unlock(); |
7ad0a0cb | 1400 | return -ENOSYS; |
3bd1e081 | 1401 | } |
6d805429 | 1402 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 1403 | { |
3be74084 | 1404 | int ret, is_data_pending; |
6d805429 | 1405 | uint64_t id = msg.u.data_pending.session_id; |
ca22feea | 1406 | |
6d805429 | 1407 | DBG("UST consumer data pending command for id %" PRIu64, id); |
ca22feea | 1408 | |
3be74084 | 1409 | is_data_pending = consumer_data_pending(id); |
ca22feea DG |
1410 | |
1411 | /* Send back returned value to session daemon */ | |
3be74084 DG |
1412 | ret = lttcomm_send_unix_sock(sock, &is_data_pending, |
1413 | sizeof(is_data_pending)); | |
ca22feea | 1414 | if (ret < 0) { |
3be74084 | 1415 | DBG("Error when sending the data pending ret code: %d", ret); |
489f70e9 | 1416 | goto error_fatal; |
ca22feea | 1417 | } |
f50f23d9 DG |
1418 | |
1419 | /* | |
1420 | * No need to send back a status message since the data pending | |
1421 | * returned value is the response. | |
1422 | */ | |
ca22feea | 1423 | break; |
53632229 | 1424 | } |
ffe60014 DG |
1425 | case LTTNG_CONSUMER_ASK_CHANNEL_CREATION: |
1426 | { | |
1427 | int ret; | |
1428 | struct ustctl_consumer_channel_attr attr; | |
1429 | ||
1430 | /* Create a plain object and reserve a channel key. */ | |
1431 | channel = allocate_channel(msg.u.ask_channel.session_id, | |
1432 | msg.u.ask_channel.pathname, msg.u.ask_channel.name, | |
1433 | msg.u.ask_channel.uid, msg.u.ask_channel.gid, | |
1434 | msg.u.ask_channel.relayd_id, msg.u.ask_channel.key, | |
1624d5b7 JD |
1435 | (enum lttng_event_output) msg.u.ask_channel.output, |
1436 | msg.u.ask_channel.tracefile_size, | |
2bba9e53 | 1437 | msg.u.ask_channel.tracefile_count, |
1950109e | 1438 | msg.u.ask_channel.session_id_per_pid, |
ecc48a90 | 1439 | msg.u.ask_channel.monitor, |
d7ba1388 | 1440 | msg.u.ask_channel.live_timer_interval, |
3d071855 | 1441 | msg.u.ask_channel.root_shm_path, |
d7ba1388 | 1442 | msg.u.ask_channel.shm_path); |
ffe60014 DG |
1443 | if (!channel) { |
1444 | goto end_channel_error; | |
1445 | } | |
1446 | ||
567eb353 DG |
1447 | /* |
1448 | * Assign UST application UID to the channel. This value is ignored for | |
1449 | * per PID buffers. This is specific to UST thus setting this after the | |
1450 | * allocation. | |
1451 | */ | |
1452 | channel->ust_app_uid = msg.u.ask_channel.ust_app_uid; | |
1453 | ||
ffe60014 DG |
1454 | /* Build channel attributes from received message. */ |
1455 | attr.subbuf_size = msg.u.ask_channel.subbuf_size; | |
1456 | attr.num_subbuf = msg.u.ask_channel.num_subbuf; | |
1457 | attr.overwrite = msg.u.ask_channel.overwrite; | |
1458 | attr.switch_timer_interval = msg.u.ask_channel.switch_timer_interval; | |
1459 | attr.read_timer_interval = msg.u.ask_channel.read_timer_interval; | |
7972aab2 | 1460 | attr.chan_id = msg.u.ask_channel.chan_id; |
ffe60014 | 1461 | memcpy(attr.uuid, msg.u.ask_channel.uuid, sizeof(attr.uuid)); |
491d1539 | 1462 | attr.blocking_timeout= msg.u.ask_channel.blocking_timeout; |
ffe60014 | 1463 | |
0c759fc9 DG |
1464 | /* Match channel buffer type to the UST abi. */ |
1465 | switch (msg.u.ask_channel.output) { | |
1466 | case LTTNG_EVENT_MMAP: | |
1467 | default: | |
1468 | attr.output = LTTNG_UST_MMAP; | |
1469 | break; | |
1470 | } | |
1471 | ||
ffe60014 DG |
1472 | /* Translate and save channel type. */ |
1473 | switch (msg.u.ask_channel.type) { | |
1474 | case LTTNG_UST_CHAN_PER_CPU: | |
1475 | channel->type = CONSUMER_CHANNEL_TYPE_DATA; | |
1476 | attr.type = LTTNG_UST_CHAN_PER_CPU; | |
8633d6e3 MD |
1477 | /* |
1478 | * Set refcount to 1 for owner. Below, we will | |
1479 | * pass ownership to the | |
1480 | * consumer_thread_channel_poll() thread. | |
1481 | */ | |
1482 | channel->refcount = 1; | |
ffe60014 DG |
1483 | break; |
1484 | case LTTNG_UST_CHAN_METADATA: | |
1485 | channel->type = CONSUMER_CHANNEL_TYPE_METADATA; | |
1486 | attr.type = LTTNG_UST_CHAN_METADATA; | |
1487 | break; | |
1488 | default: | |
1489 | assert(0); | |
1490 | goto error_fatal; | |
1491 | }; | |
1492 | ||
9ce5646a MD |
1493 | health_code_update(); |
1494 | ||
ffe60014 DG |
1495 | ret = ask_channel(ctx, sock, channel, &attr); |
1496 | if (ret < 0) { | |
1497 | goto end_channel_error; | |
1498 | } | |
1499 | ||
fc643247 MD |
1500 | if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) { |
1501 | ret = consumer_metadata_cache_allocate(channel); | |
1502 | if (ret < 0) { | |
1503 | ERR("Allocating metadata cache"); | |
1504 | goto end_channel_error; | |
1505 | } | |
1506 | consumer_timer_switch_start(channel, attr.switch_timer_interval); | |
1507 | attr.switch_timer_interval = 0; | |
94d49140 | 1508 | } else { |
e9404c27 JG |
1509 | int monitor_start_ret; |
1510 | ||
94d49140 JD |
1511 | consumer_timer_live_start(channel, |
1512 | msg.u.ask_channel.live_timer_interval); | |
e9404c27 JG |
1513 | monitor_start_ret = consumer_timer_monitor_start( |
1514 | channel, | |
1515 | msg.u.ask_channel.monitor_timer_interval); | |
1516 | if (monitor_start_ret < 0) { | |
1517 | ERR("Starting channel monitoring timer failed"); | |
1518 | goto end_channel_error; | |
1519 | } | |
fc643247 MD |
1520 | } |
1521 | ||
9ce5646a MD |
1522 | health_code_update(); |
1523 | ||
ffe60014 DG |
1524 | /* |
1525 | * Add the channel to the internal state AFTER all streams were created | |
1526 | * and successfully sent to session daemon. This way, all streams must | |
1527 | * be ready before this channel is visible to the threads. | |
fc643247 MD |
1528 | * If add_channel succeeds, ownership of the channel is |
1529 | * passed to consumer_thread_channel_poll(). | |
ffe60014 DG |
1530 | */ |
1531 | ret = add_channel(channel, ctx); | |
1532 | if (ret < 0) { | |
ea88ca2a MD |
1533 | if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) { |
1534 | if (channel->switch_timer_enabled == 1) { | |
1535 | consumer_timer_switch_stop(channel); | |
1536 | } | |
1537 | consumer_metadata_cache_destroy(channel); | |
1538 | } | |
d3e2ba59 JD |
1539 | if (channel->live_timer_enabled == 1) { |
1540 | consumer_timer_live_stop(channel); | |
1541 | } | |
e9404c27 JG |
1542 | if (channel->monitor_timer_enabled == 1) { |
1543 | consumer_timer_monitor_stop(channel); | |
1544 | } | |
ffe60014 DG |
1545 | goto end_channel_error; |
1546 | } | |
1547 | ||
9ce5646a MD |
1548 | health_code_update(); |
1549 | ||
ffe60014 DG |
1550 | /* |
1551 | * Channel and streams are now created. Inform the session daemon that | |
1552 | * everything went well and should wait to receive the channel and | |
1553 | * streams with ustctl API. | |
1554 | */ | |
1555 | ret = consumer_send_status_channel(sock, channel); | |
1556 | if (ret < 0) { | |
1557 | /* | |
489f70e9 | 1558 | * There is probably a problem on the socket. |
ffe60014 | 1559 | */ |
489f70e9 | 1560 | goto error_fatal; |
ffe60014 DG |
1561 | } |
1562 | ||
1563 | break; | |
1564 | } | |
1565 | case LTTNG_CONSUMER_GET_CHANNEL: | |
1566 | { | |
1567 | int ret, relayd_err = 0; | |
d88aee68 | 1568 | uint64_t key = msg.u.get_channel.key; |
ffe60014 | 1569 | struct lttng_consumer_channel *channel; |
ffe60014 DG |
1570 | |
1571 | channel = consumer_find_channel(key); | |
1572 | if (!channel) { | |
8fd623e0 | 1573 | ERR("UST consumer get channel key %" PRIu64 " not found", key); |
e462382a | 1574 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
1575 | goto end_msg_sessiond; |
1576 | } | |
1577 | ||
9ce5646a MD |
1578 | health_code_update(); |
1579 | ||
ffe60014 DG |
1580 | /* Send everything to sessiond. */ |
1581 | ret = send_sessiond_channel(sock, channel, ctx, &relayd_err); | |
1582 | if (ret < 0) { | |
1583 | if (relayd_err) { | |
1584 | /* | |
1585 | * We were unable to send to the relayd the stream so avoid | |
1586 | * sending back a fatal error to the thread since this is OK | |
f2a444f1 DG |
1587 | * and the consumer can continue its work. The above call |
1588 | * has sent the error status message to the sessiond. | |
ffe60014 | 1589 | */ |
f2a444f1 | 1590 | goto end_nosignal; |
ffe60014 DG |
1591 | } |
1592 | /* | |
1593 | * The communicaton was broken hence there is a bad state between | |
1594 | * the consumer and sessiond so stop everything. | |
1595 | */ | |
1596 | goto error_fatal; | |
1597 | } | |
1598 | ||
9ce5646a MD |
1599 | health_code_update(); |
1600 | ||
10a50311 JD |
1601 | /* |
1602 | * In no monitor mode, the streams ownership is kept inside the channel | |
1603 | * so don't send them to the data thread. | |
1604 | */ | |
1605 | if (!channel->monitor) { | |
1606 | goto end_msg_sessiond; | |
1607 | } | |
1608 | ||
d88aee68 DG |
1609 | ret = send_streams_to_thread(channel, ctx); |
1610 | if (ret < 0) { | |
1611 | /* | |
1612 | * If we are unable to send the stream to the thread, there is | |
1613 | * a big problem so just stop everything. | |
1614 | */ | |
1615 | goto error_fatal; | |
ffe60014 | 1616 | } |
ffe60014 DG |
1617 | /* List MUST be empty after or else it could be reused. */ |
1618 | assert(cds_list_empty(&channel->streams.head)); | |
d88aee68 DG |
1619 | goto end_msg_sessiond; |
1620 | } | |
1621 | case LTTNG_CONSUMER_DESTROY_CHANNEL: | |
1622 | { | |
1623 | uint64_t key = msg.u.destroy_channel.key; | |
d88aee68 | 1624 | |
a0cbdd2e MD |
1625 | /* |
1626 | * Only called if streams have not been sent to stream | |
1627 | * manager thread. However, channel has been sent to | |
1628 | * channel manager thread. | |
1629 | */ | |
1630 | notify_thread_del_channel(ctx, key); | |
d88aee68 | 1631 | goto end_msg_sessiond; |
ffe60014 | 1632 | } |
d88aee68 DG |
1633 | case LTTNG_CONSUMER_CLOSE_METADATA: |
1634 | { | |
1635 | int ret; | |
1636 | ||
1637 | ret = close_metadata(msg.u.close_metadata.key); | |
1638 | if (ret != 0) { | |
1639 | ret_code = ret; | |
1640 | } | |
1641 | ||
1642 | goto end_msg_sessiond; | |
1643 | } | |
7972aab2 DG |
1644 | case LTTNG_CONSUMER_FLUSH_CHANNEL: |
1645 | { | |
1646 | int ret; | |
1647 | ||
1648 | ret = flush_channel(msg.u.flush_channel.key); | |
1649 | if (ret != 0) { | |
1650 | ret_code = ret; | |
1651 | } | |
1652 | ||
1653 | goto end_msg_sessiond; | |
1654 | } | |
0dd01979 MD |
1655 | case LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL: |
1656 | { | |
1657 | int ret; | |
1658 | ||
1659 | ret = clear_quiescent_channel( | |
1660 | msg.u.clear_quiescent_channel.key); | |
1661 | if (ret != 0) { | |
1662 | ret_code = ret; | |
1663 | } | |
1664 | ||
1665 | goto end_msg_sessiond; | |
1666 | } | |
d88aee68 | 1667 | case LTTNG_CONSUMER_PUSH_METADATA: |
ffe60014 DG |
1668 | { |
1669 | int ret; | |
d88aee68 | 1670 | uint64_t len = msg.u.push_metadata.len; |
d88aee68 | 1671 | uint64_t key = msg.u.push_metadata.key; |
331744e3 | 1672 | uint64_t offset = msg.u.push_metadata.target_offset; |
93ec662e | 1673 | uint64_t version = msg.u.push_metadata.version; |
ffe60014 DG |
1674 | struct lttng_consumer_channel *channel; |
1675 | ||
8fd623e0 DG |
1676 | DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, |
1677 | len); | |
ffe60014 DG |
1678 | |
1679 | channel = consumer_find_channel(key); | |
1680 | if (!channel) { | |
000baf6a DG |
1681 | /* |
1682 | * This is possible if the metadata creation on the consumer side | |
1683 | * is in flight vis-a-vis a concurrent push metadata from the | |
1684 | * session daemon. Simply return that the channel failed and the | |
1685 | * session daemon will handle that message correctly considering | |
1686 | * that this race is acceptable thus the DBG() statement here. | |
1687 | */ | |
1688 | DBG("UST consumer push metadata %" PRIu64 " not found", key); | |
1689 | ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; | |
4a2eb0ca | 1690 | goto end_msg_sessiond; |
d88aee68 DG |
1691 | } |
1692 | ||
9ce5646a MD |
1693 | health_code_update(); |
1694 | ||
c585821b MD |
1695 | if (!len) { |
1696 | /* | |
1697 | * There is nothing to receive. We have simply | |
1698 | * checked whether the channel can be found. | |
1699 | */ | |
1700 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1701 | goto end_msg_sessiond; | |
1702 | } | |
1703 | ||
d88aee68 | 1704 | /* Tell session daemon we are ready to receive the metadata. */ |
0c759fc9 | 1705 | ret = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
ffe60014 DG |
1706 | if (ret < 0) { |
1707 | /* Somehow, the session daemon is not responding anymore. */ | |
d88aee68 DG |
1708 | goto error_fatal; |
1709 | } | |
1710 | ||
9ce5646a MD |
1711 | health_code_update(); |
1712 | ||
d88aee68 | 1713 | /* Wait for more data. */ |
9ce5646a MD |
1714 | health_poll_entry(); |
1715 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
1716 | health_poll_exit(); | |
84382d49 | 1717 | if (ret) { |
489f70e9 | 1718 | goto error_fatal; |
d88aee68 DG |
1719 | } |
1720 | ||
9ce5646a MD |
1721 | health_code_update(); |
1722 | ||
331744e3 | 1723 | ret = lttng_ustconsumer_recv_metadata(sock, key, offset, |
93ec662e | 1724 | len, version, channel, 0, 1); |
d88aee68 | 1725 | if (ret < 0) { |
331744e3 | 1726 | /* error receiving from sessiond */ |
489f70e9 | 1727 | goto error_fatal; |
331744e3 JD |
1728 | } else { |
1729 | ret_code = ret; | |
d88aee68 DG |
1730 | goto end_msg_sessiond; |
1731 | } | |
d88aee68 DG |
1732 | } |
1733 | case LTTNG_CONSUMER_SETUP_METADATA: | |
1734 | { | |
1735 | int ret; | |
1736 | ||
1737 | ret = setup_metadata(ctx, msg.u.setup_metadata.key); | |
1738 | if (ret) { | |
1739 | ret_code = ret; | |
1740 | } | |
1741 | goto end_msg_sessiond; | |
ffe60014 | 1742 | } |
6dc3064a DG |
1743 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
1744 | { | |
10a50311 JD |
1745 | if (msg.u.snapshot_channel.metadata) { |
1746 | ret = snapshot_metadata(msg.u.snapshot_channel.key, | |
1747 | msg.u.snapshot_channel.pathname, | |
1748 | msg.u.snapshot_channel.relayd_id, | |
1749 | ctx); | |
1750 | if (ret < 0) { | |
1751 | ERR("Snapshot metadata failed"); | |
e462382a | 1752 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; |
10a50311 JD |
1753 | } |
1754 | } else { | |
1755 | ret = snapshot_channel(msg.u.snapshot_channel.key, | |
1756 | msg.u.snapshot_channel.pathname, | |
1757 | msg.u.snapshot_channel.relayd_id, | |
d07ceecd | 1758 | msg.u.snapshot_channel.nb_packets_per_stream, |
10a50311 JD |
1759 | ctx); |
1760 | if (ret < 0) { | |
1761 | ERR("Snapshot channel failed"); | |
e462382a | 1762 | ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; |
10a50311 JD |
1763 | } |
1764 | } | |
1765 | ||
9ce5646a | 1766 | health_code_update(); |
6dc3064a DG |
1767 | ret = consumer_send_status_msg(sock, ret_code); |
1768 | if (ret < 0) { | |
1769 | /* Somehow, the session daemon is not responding anymore. */ | |
1770 | goto end_nosignal; | |
1771 | } | |
9ce5646a | 1772 | health_code_update(); |
6dc3064a DG |
1773 | break; |
1774 | } | |
fb83fe64 JD |
1775 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1776 | { | |
beb59458 MJ |
1777 | int ret = 0; |
1778 | uint64_t discarded_events; | |
fb83fe64 JD |
1779 | struct lttng_ht_iter iter; |
1780 | struct lttng_ht *ht; | |
1781 | struct lttng_consumer_stream *stream; | |
1782 | uint64_t id = msg.u.discarded_events.session_id; | |
1783 | uint64_t key = msg.u.discarded_events.channel_key; | |
1784 | ||
1785 | DBG("UST consumer discarded events command for session id %" | |
1786 | PRIu64, id); | |
1787 | rcu_read_lock(); | |
1788 | pthread_mutex_lock(&consumer_data.lock); | |
1789 | ||
1790 | ht = consumer_data.stream_list_ht; | |
1791 | ||
1792 | /* | |
1793 | * We only need a reference to the channel, but they are not | |
1794 | * directly indexed, so we just use the first matching stream | |
1795 | * to extract the information we need, we default to 0 if not | |
1796 | * found (no events are dropped if the channel is not yet in | |
1797 | * use). | |
1798 | */ | |
beb59458 | 1799 | discarded_events = 0; |
fb83fe64 JD |
1800 | cds_lfht_for_each_entry_duplicate(ht->ht, |
1801 | ht->hash_fct(&id, lttng_ht_seed), | |
1802 | ht->match_fct, &id, | |
1803 | &iter.iter, stream, node_session_id.node) { | |
1804 | if (stream->chan->key == key) { | |
beb59458 | 1805 | discarded_events = stream->chan->discarded_events; |
fb83fe64 JD |
1806 | break; |
1807 | } | |
1808 | } | |
1809 | pthread_mutex_unlock(&consumer_data.lock); | |
1810 | rcu_read_unlock(); | |
1811 | ||
1812 | DBG("UST consumer discarded events command for session id %" | |
1813 | PRIu64 ", channel key %" PRIu64, id, key); | |
1814 | ||
1815 | health_code_update(); | |
1816 | ||
1817 | /* Send back returned value to session daemon */ | |
beb59458 | 1818 | ret = lttcomm_send_unix_sock(sock, &discarded_events, sizeof(discarded_events)); |
fb83fe64 JD |
1819 | if (ret < 0) { |
1820 | PERROR("send discarded events"); | |
1821 | goto error_fatal; | |
1822 | } | |
1823 | ||
1824 | break; | |
1825 | } | |
1826 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1827 | { | |
9a06e8d4 JG |
1828 | int ret; |
1829 | uint64_t lost_packets; | |
fb83fe64 JD |
1830 | struct lttng_ht_iter iter; |
1831 | struct lttng_ht *ht; | |
1832 | struct lttng_consumer_stream *stream; | |
1833 | uint64_t id = msg.u.lost_packets.session_id; | |
1834 | uint64_t key = msg.u.lost_packets.channel_key; | |
1835 | ||
1836 | DBG("UST consumer lost packets command for session id %" | |
1837 | PRIu64, id); | |
1838 | rcu_read_lock(); | |
1839 | pthread_mutex_lock(&consumer_data.lock); | |
1840 | ||
1841 | ht = consumer_data.stream_list_ht; | |
1842 | ||
1843 | /* | |
1844 | * We only need a reference to the channel, but they are not | |
1845 | * directly indexed, so we just use the first matching stream | |
1846 | * to extract the information we need, we default to 0 if not | |
1847 | * found (no packets lost if the channel is not yet in use). | |
1848 | */ | |
9a06e8d4 | 1849 | lost_packets = 0; |
fb83fe64 JD |
1850 | cds_lfht_for_each_entry_duplicate(ht->ht, |
1851 | ht->hash_fct(&id, lttng_ht_seed), | |
1852 | ht->match_fct, &id, | |
1853 | &iter.iter, stream, node_session_id.node) { | |
1854 | if (stream->chan->key == key) { | |
9a06e8d4 | 1855 | lost_packets = stream->chan->lost_packets; |
fb83fe64 JD |
1856 | break; |
1857 | } | |
1858 | } | |
1859 | pthread_mutex_unlock(&consumer_data.lock); | |
1860 | rcu_read_unlock(); | |
1861 | ||
1862 | DBG("UST consumer lost packets command for session id %" | |
1863 | PRIu64 ", channel key %" PRIu64, id, key); | |
1864 | ||
1865 | health_code_update(); | |
1866 | ||
1867 | /* Send back returned value to session daemon */ | |
9a06e8d4 JG |
1868 | ret = lttcomm_send_unix_sock(sock, &lost_packets, |
1869 | sizeof(lost_packets)); | |
fb83fe64 JD |
1870 | if (ret < 0) { |
1871 | PERROR("send lost packets"); | |
1872 | goto error_fatal; | |
1873 | } | |
1874 | ||
1875 | break; | |
1876 | } | |
b3530820 JG |
1877 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1878 | { | |
1879 | int channel_monitor_pipe; | |
1880 | ||
1881 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1882 | /* Successfully received the command's type. */ | |
1883 | ret = consumer_send_status_msg(sock, ret_code); | |
1884 | if (ret < 0) { | |
1885 | goto error_fatal; | |
1886 | } | |
1887 | ||
1888 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, | |
1889 | 1); | |
1890 | if (ret != sizeof(channel_monitor_pipe)) { | |
1891 | ERR("Failed to receive channel monitor pipe"); | |
1892 | goto error_fatal; | |
1893 | } | |
1894 | ||
1895 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
1896 | ret = consumer_timer_thread_set_channel_monitor_pipe( | |
1897 | channel_monitor_pipe); | |
1898 | if (!ret) { | |
1899 | int flags; | |
1900 | ||
1901 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1902 | /* Set the pipe as non-blocking. */ | |
1903 | ret = fcntl(channel_monitor_pipe, F_GETFL, 0); | |
1904 | if (ret == -1) { | |
1905 | PERROR("fcntl get flags of the channel monitoring pipe"); | |
1906 | goto error_fatal; | |
1907 | } | |
1908 | flags = ret; | |
1909 | ||
1910 | ret = fcntl(channel_monitor_pipe, F_SETFL, | |
1911 | flags | O_NONBLOCK); | |
1912 | if (ret == -1) { | |
1913 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); | |
1914 | goto error_fatal; | |
1915 | } | |
1916 | DBG("Channel monitor pipe set as non-blocking"); | |
1917 | } else { | |
1918 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1919 | } | |
1920 | goto end_msg_sessiond; | |
1921 | } | |
62c43103 JD |
1922 | case LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE: |
1923 | { | |
1924 | int channel_rotate_pipe; | |
1925 | int flags; | |
1926 | ||
1927 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1928 | /* Successfully received the command's type. */ | |
1929 | ret = consumer_send_status_msg(sock, ret_code); | |
1930 | if (ret < 0) { | |
1931 | goto error_fatal; | |
1932 | } | |
1933 | ||
1934 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_rotate_pipe, 1); | |
1935 | if (ret != sizeof(channel_rotate_pipe)) { | |
1936 | ERR("Failed to receive channel rotate pipe"); | |
1937 | goto error_fatal; | |
1938 | } | |
1939 | ||
1940 | DBG("Received channel rotate pipe (%d)", channel_rotate_pipe); | |
1941 | ctx->channel_rotate_pipe = channel_rotate_pipe; | |
1942 | /* Set the pipe as non-blocking. */ | |
1943 | ret = fcntl(channel_rotate_pipe, F_GETFL, 0); | |
1944 | if (ret == -1) { | |
1945 | PERROR("fcntl get flags of the channel rotate pipe"); | |
1946 | goto error_fatal; | |
1947 | } | |
1948 | flags = ret; | |
1949 | ||
1950 | ret = fcntl(channel_rotate_pipe, F_SETFL, flags | O_NONBLOCK); | |
1951 | if (ret == -1) { | |
1952 | PERROR("fcntl set O_NONBLOCK flag of the channel rotate pipe"); | |
1953 | goto error_fatal; | |
1954 | } | |
1955 | DBG("Channel rotate pipe set as non-blocking"); | |
1956 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1957 | ret = consumer_send_status_msg(sock, ret_code); | |
1958 | if (ret < 0) { | |
1959 | goto error_fatal; | |
1960 | } | |
1961 | break; | |
1962 | } | |
b99a8d42 JD |
1963 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1964 | { | |
1965 | /* | |
1966 | * Sample the rotate position of all the streams in this channel. | |
1967 | */ | |
1968 | ret = lttng_consumer_rotate_channel(msg.u.rotate_channel.key, | |
1969 | msg.u.rotate_channel.pathname, | |
1970 | msg.u.rotate_channel.relayd_id, | |
1971 | msg.u.rotate_channel.metadata, | |
1972 | msg.u.rotate_channel.new_chunk_id, | |
1973 | ctx); | |
1974 | if (ret < 0) { | |
1975 | ERR("Rotate channel failed"); | |
1976 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1977 | } | |
1978 | ||
1979 | health_code_update(); | |
1980 | ||
1981 | ret = consumer_send_status_msg(sock, ret_code); | |
1982 | if (ret < 0) { | |
1983 | /* Somehow, the session daemon is not responding anymore. */ | |
1984 | goto end_nosignal; | |
1985 | } | |
1986 | ||
1987 | /* | |
1988 | * Rotate the streams that are ready right now. | |
1989 | * FIXME: this is a second consecutive iteration over the | |
1990 | * streams in a channel, there is probably a better way to | |
1991 | * handle this, but it needs to be after the | |
1992 | * consumer_send_status_msg() call. | |
1993 | */ | |
1994 | ret = lttng_consumer_rotate_ready_streams( | |
1995 | msg.u.rotate_channel.key, ctx); | |
1996 | if (ret < 0) { | |
1997 | ERR("Rotate channel failed"); | |
1998 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1999 | } | |
2000 | break; | |
2001 | } | |
00fb02ac JD |
2002 | case LTTNG_CONSUMER_ROTATE_RENAME: |
2003 | { | |
2004 | DBG("Consumer rename session %" PRIu64 " after rotation", | |
2005 | msg.u.rotate_rename.session_id); | |
2006 | ret = lttng_consumer_rotate_rename(msg.u.rotate_rename.old_path, | |
2007 | msg.u.rotate_rename.new_path, | |
2008 | msg.u.rotate_rename.uid, | |
2009 | msg.u.rotate_rename.gid, | |
2010 | msg.u.rotate_rename.relayd_id); | |
2011 | if (ret < 0) { | |
2012 | ERR("Rotate rename failed"); | |
d88744a4 JD |
2013 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
2014 | } | |
2015 | ||
2016 | health_code_update(); | |
2017 | ||
2018 | ret = consumer_send_status_msg(sock, ret_code); | |
2019 | if (ret < 0) { | |
2020 | /* Somehow, the session daemon is not responding anymore. */ | |
2021 | goto end_nosignal; | |
2022 | } | |
2023 | break; | |
2024 | } | |
2025 | case LTTNG_CONSUMER_ROTATE_PENDING_RELAY: | |
2026 | { | |
2027 | uint32_t pending; | |
2028 | ||
2029 | DBG("Consumer rotate pending on relay for session %" PRIu64, | |
2030 | msg.u.rotate_pending_relay.session_id); | |
2031 | pending = lttng_consumer_rotate_pending_relay( | |
2032 | msg.u.rotate_pending_relay.session_id, | |
2033 | msg.u.rotate_pending_relay.relayd_id, | |
2034 | msg.u.rotate_pending_relay.chunk_id); | |
2035 | if (pending < 0) { | |
2036 | ERR("Rotate pending relay failed"); | |
2037 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
00fb02ac JD |
2038 | } |
2039 | ||
2040 | health_code_update(); | |
2041 | ||
2042 | ret = consumer_send_status_msg(sock, ret_code); | |
2043 | if (ret < 0) { | |
2044 | /* Somehow, the session daemon is not responding anymore. */ | |
2045 | goto end_nosignal; | |
2046 | } | |
d88744a4 JD |
2047 | |
2048 | /* Send back returned value to session daemon */ | |
2049 | ret = lttcomm_send_unix_sock(sock, &pending, sizeof(pending)); | |
2050 | if (ret < 0) { | |
2051 | PERROR("send data pending ret code"); | |
2052 | goto error_fatal; | |
2053 | } | |
00fb02ac JD |
2054 | break; |
2055 | } | |
a1ae2ea5 JD |
2056 | case LTTNG_CONSUMER_MKDIR: |
2057 | { | |
2058 | DBG("Consumer mkdir %s in session %" PRIu64, | |
2059 | msg.u.mkdir.path, | |
2060 | msg.u.mkdir.session_id); | |
2061 | ret = lttng_consumer_mkdir(msg.u.mkdir.path, | |
2062 | msg.u.mkdir.uid, | |
2063 | msg.u.mkdir.gid, | |
2064 | msg.u.mkdir.relayd_id); | |
2065 | if (ret < 0) { | |
2066 | ERR("consumer mkdir failed"); | |
d88744a4 | 2067 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
a1ae2ea5 JD |
2068 | } |
2069 | ||
2070 | health_code_update(); | |
2071 | ||
2072 | ret = consumer_send_status_msg(sock, ret_code); | |
2073 | if (ret < 0) { | |
2074 | /* Somehow, the session daemon is not responding anymore. */ | |
2075 | goto end_nosignal; | |
2076 | } | |
2077 | break; | |
2078 | } | |
3bd1e081 MD |
2079 | default: |
2080 | break; | |
2081 | } | |
3f8e211f | 2082 | |
3bd1e081 | 2083 | end_nosignal: |
b0b335c8 | 2084 | rcu_read_unlock(); |
4cbc1a04 | 2085 | |
9ce5646a MD |
2086 | health_code_update(); |
2087 | ||
4cbc1a04 DG |
2088 | /* |
2089 | * Return 1 to indicate success since the 0 value can be a socket | |
2090 | * shutdown during the recv() or send() call. | |
2091 | */ | |
2092 | return 1; | |
ffe60014 DG |
2093 | |
2094 | end_msg_sessiond: | |
2095 | /* | |
2096 | * The returned value here is not useful since either way we'll return 1 to | |
2097 | * the caller because the session daemon socket management is done | |
2098 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
2099 | */ | |
489f70e9 MD |
2100 | ret = consumer_send_status_msg(sock, ret_code); |
2101 | if (ret < 0) { | |
2102 | goto error_fatal; | |
2103 | } | |
ffe60014 | 2104 | rcu_read_unlock(); |
9ce5646a MD |
2105 | |
2106 | health_code_update(); | |
2107 | ||
ffe60014 DG |
2108 | return 1; |
2109 | end_channel_error: | |
2110 | if (channel) { | |
2111 | /* | |
2112 | * Free channel here since no one has a reference to it. We don't | |
2113 | * free after that because a stream can store this pointer. | |
2114 | */ | |
2115 | destroy_channel(channel); | |
2116 | } | |
2117 | /* We have to send a status channel message indicating an error. */ | |
2118 | ret = consumer_send_status_channel(sock, NULL); | |
2119 | if (ret < 0) { | |
2120 | /* Stop everything if session daemon can not be notified. */ | |
2121 | goto error_fatal; | |
2122 | } | |
2123 | rcu_read_unlock(); | |
9ce5646a MD |
2124 | |
2125 | health_code_update(); | |
2126 | ||
ffe60014 DG |
2127 | return 1; |
2128 | error_fatal: | |
2129 | rcu_read_unlock(); | |
2130 | /* This will issue a consumer stop. */ | |
2131 | return -1; | |
3bd1e081 MD |
2132 | } |
2133 | ||
ffe60014 DG |
2134 | /* |
2135 | * Wrapper over the mmap() read offset from ust-ctl library. Since this can be | |
2136 | * compiled out, we isolate it in this library. | |
2137 | */ | |
2138 | int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream, | |
2139 | unsigned long *off) | |
3bd1e081 | 2140 | { |
ffe60014 DG |
2141 | assert(stream); |
2142 | assert(stream->ustream); | |
b5c5fc29 | 2143 | |
ffe60014 | 2144 | return ustctl_get_mmap_read_offset(stream->ustream, off); |
3bd1e081 MD |
2145 | } |
2146 | ||
ffe60014 DG |
2147 | /* |
2148 | * Wrapper over the mmap() read offset from ust-ctl library. Since this can be | |
2149 | * compiled out, we isolate it in this library. | |
2150 | */ | |
2151 | void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream) | |
d056b477 | 2152 | { |
ffe60014 DG |
2153 | assert(stream); |
2154 | assert(stream->ustream); | |
2155 | ||
2156 | return ustctl_get_mmap_base(stream->ustream); | |
d056b477 MD |
2157 | } |
2158 | ||
fc6d7a51 JD |
2159 | void lttng_ustctl_flush_buffer(struct lttng_consumer_stream *stream, |
2160 | int producer_active) | |
2161 | { | |
2162 | assert(stream); | |
2163 | assert(stream->ustream); | |
2164 | ||
2165 | ustctl_flush_buffer(stream->ustream, producer_active); | |
2166 | } | |
2167 | ||
ffe60014 | 2168 | /* |
e9404c27 | 2169 | * Take a snapshot for a specific stream. |
ffe60014 DG |
2170 | * |
2171 | * Returns 0 on success, < 0 on error | |
2172 | */ | |
2173 | int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream) | |
3bd1e081 | 2174 | { |
ffe60014 DG |
2175 | assert(stream); |
2176 | assert(stream->ustream); | |
2177 | ||
2178 | return ustctl_snapshot(stream->ustream); | |
3bd1e081 MD |
2179 | } |
2180 | ||
e9404c27 JG |
2181 | /* |
2182 | * Sample consumed and produced positions for a specific stream. | |
2183 | * | |
2184 | * Returns 0 on success, < 0 on error. | |
2185 | */ | |
2186 | int lttng_ustconsumer_sample_snapshot_positions( | |
2187 | struct lttng_consumer_stream *stream) | |
2188 | { | |
2189 | assert(stream); | |
2190 | assert(stream->ustream); | |
2191 | ||
2192 | return ustctl_snapshot_sample_positions(stream->ustream); | |
2193 | } | |
2194 | ||
ffe60014 DG |
2195 | /* |
2196 | * Get the produced position | |
2197 | * | |
2198 | * Returns 0 on success, < 0 on error | |
2199 | */ | |
2200 | int lttng_ustconsumer_get_produced_snapshot( | |
2201 | struct lttng_consumer_stream *stream, unsigned long *pos) | |
3bd1e081 | 2202 | { |
ffe60014 DG |
2203 | assert(stream); |
2204 | assert(stream->ustream); | |
2205 | assert(pos); | |
7a57cf92 | 2206 | |
ffe60014 DG |
2207 | return ustctl_snapshot_get_produced(stream->ustream, pos); |
2208 | } | |
7a57cf92 | 2209 | |
10a50311 JD |
2210 | /* |
2211 | * Get the consumed position | |
2212 | * | |
2213 | * Returns 0 on success, < 0 on error | |
2214 | */ | |
2215 | int lttng_ustconsumer_get_consumed_snapshot( | |
2216 | struct lttng_consumer_stream *stream, unsigned long *pos) | |
2217 | { | |
2218 | assert(stream); | |
2219 | assert(stream->ustream); | |
2220 | assert(pos); | |
2221 | ||
2222 | return ustctl_snapshot_get_consumed(stream->ustream, pos); | |
2223 | } | |
2224 | ||
84a182ce DG |
2225 | void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream, |
2226 | int producer) | |
2227 | { | |
2228 | assert(stream); | |
2229 | assert(stream->ustream); | |
2230 | ||
2231 | ustctl_flush_buffer(stream->ustream, producer); | |
2232 | } | |
2233 | ||
2234 | int lttng_ustconsumer_get_current_timestamp( | |
2235 | struct lttng_consumer_stream *stream, uint64_t *ts) | |
2236 | { | |
2237 | assert(stream); | |
2238 | assert(stream->ustream); | |
2239 | assert(ts); | |
2240 | ||
2241 | return ustctl_get_current_timestamp(stream->ustream, ts); | |
2242 | } | |
2243 | ||
fb83fe64 JD |
2244 | int lttng_ustconsumer_get_sequence_number( |
2245 | struct lttng_consumer_stream *stream, uint64_t *seq) | |
2246 | { | |
2247 | assert(stream); | |
2248 | assert(stream->ustream); | |
2249 | assert(seq); | |
2250 | ||
2251 | return ustctl_get_sequence_number(stream->ustream, seq); | |
2252 | } | |
2253 | ||
ffe60014 | 2254 | /* |
0dd01979 | 2255 | * Called when the stream signals the consumer that it has hung up. |
ffe60014 DG |
2256 | */ |
2257 | void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream) | |
2258 | { | |
2259 | assert(stream); | |
2260 | assert(stream->ustream); | |
2c1dd183 | 2261 | |
0dd01979 MD |
2262 | pthread_mutex_lock(&stream->lock); |
2263 | if (!stream->quiescent) { | |
2264 | ustctl_flush_buffer(stream->ustream, 0); | |
2265 | stream->quiescent = true; | |
2266 | } | |
2267 | pthread_mutex_unlock(&stream->lock); | |
ffe60014 DG |
2268 | stream->hangup_flush_done = 1; |
2269 | } | |
ee77a7b0 | 2270 | |
ffe60014 DG |
2271 | void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan) |
2272 | { | |
4628484a MD |
2273 | int i; |
2274 | ||
ffe60014 DG |
2275 | assert(chan); |
2276 | assert(chan->uchan); | |
e316aad5 | 2277 | |
ea88ca2a MD |
2278 | if (chan->switch_timer_enabled == 1) { |
2279 | consumer_timer_switch_stop(chan); | |
2280 | } | |
4628484a MD |
2281 | for (i = 0; i < chan->nr_stream_fds; i++) { |
2282 | int ret; | |
2283 | ||
2284 | ret = close(chan->stream_fds[i]); | |
2285 | if (ret) { | |
2286 | PERROR("close"); | |
2287 | } | |
2288 | if (chan->shm_path[0]) { | |
2289 | char shm_path[PATH_MAX]; | |
2290 | ||
2291 | ret = get_stream_shm_path(shm_path, chan->shm_path, i); | |
2292 | if (ret) { | |
2293 | ERR("Cannot get stream shm path"); | |
2294 | } | |
2295 | ret = run_as_unlink(shm_path, chan->uid, chan->gid); | |
2296 | if (ret) { | |
4628484a MD |
2297 | PERROR("unlink %s", shm_path); |
2298 | } | |
2299 | } | |
2300 | } | |
3bd1e081 MD |
2301 | } |
2302 | ||
b83e03c4 MD |
2303 | void lttng_ustconsumer_free_channel(struct lttng_consumer_channel *chan) |
2304 | { | |
2305 | assert(chan); | |
2306 | assert(chan->uchan); | |
2307 | ||
2308 | consumer_metadata_cache_destroy(chan); | |
2309 | ustctl_destroy_channel(chan->uchan); | |
ea853771 JR |
2310 | /* Try to rmdir all directories under shm_path root. */ |
2311 | if (chan->root_shm_path[0]) { | |
602766ec | 2312 | (void) run_as_rmdir_recursive(chan->root_shm_path, |
ea853771 JR |
2313 | chan->uid, chan->gid); |
2314 | } | |
b83e03c4 MD |
2315 | free(chan->stream_fds); |
2316 | } | |
2317 | ||
3bd1e081 MD |
2318 | void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream) |
2319 | { | |
ffe60014 DG |
2320 | assert(stream); |
2321 | assert(stream->ustream); | |
d41f73b7 | 2322 | |
ea88ca2a MD |
2323 | if (stream->chan->switch_timer_enabled == 1) { |
2324 | consumer_timer_switch_stop(stream->chan); | |
2325 | } | |
ffe60014 DG |
2326 | ustctl_destroy_stream(stream->ustream); |
2327 | } | |
d41f73b7 | 2328 | |
6d574024 DG |
2329 | int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream) |
2330 | { | |
2331 | assert(stream); | |
2332 | assert(stream->ustream); | |
2333 | ||
2334 | return ustctl_stream_get_wakeup_fd(stream->ustream); | |
2335 | } | |
2336 | ||
2337 | int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream) | |
2338 | { | |
2339 | assert(stream); | |
2340 | assert(stream->ustream); | |
2341 | ||
2342 | return ustctl_stream_close_wakeup_fd(stream->ustream); | |
2343 | } | |
2344 | ||
309167d2 JD |
2345 | /* |
2346 | * Populate index values of a UST stream. Values are set in big endian order. | |
2347 | * | |
2348 | * Return 0 on success or else a negative value. | |
2349 | */ | |
50adc264 | 2350 | static int get_index_values(struct ctf_packet_index *index, |
309167d2 JD |
2351 | struct ustctl_consumer_stream *ustream) |
2352 | { | |
2353 | int ret; | |
2354 | ||
2355 | ret = ustctl_get_timestamp_begin(ustream, &index->timestamp_begin); | |
2356 | if (ret < 0) { | |
2357 | PERROR("ustctl_get_timestamp_begin"); | |
2358 | goto error; | |
2359 | } | |
2360 | index->timestamp_begin = htobe64(index->timestamp_begin); | |
2361 | ||
2362 | ret = ustctl_get_timestamp_end(ustream, &index->timestamp_end); | |
2363 | if (ret < 0) { | |
2364 | PERROR("ustctl_get_timestamp_end"); | |
2365 | goto error; | |
2366 | } | |
2367 | index->timestamp_end = htobe64(index->timestamp_end); | |
2368 | ||
2369 | ret = ustctl_get_events_discarded(ustream, &index->events_discarded); | |
2370 | if (ret < 0) { | |
2371 | PERROR("ustctl_get_events_discarded"); | |
2372 | goto error; | |
2373 | } | |
2374 | index->events_discarded = htobe64(index->events_discarded); | |
2375 | ||
2376 | ret = ustctl_get_content_size(ustream, &index->content_size); | |
2377 | if (ret < 0) { | |
2378 | PERROR("ustctl_get_content_size"); | |
2379 | goto error; | |
2380 | } | |
2381 | index->content_size = htobe64(index->content_size); | |
2382 | ||
2383 | ret = ustctl_get_packet_size(ustream, &index->packet_size); | |
2384 | if (ret < 0) { | |
2385 | PERROR("ustctl_get_packet_size"); | |
2386 | goto error; | |
2387 | } | |
2388 | index->packet_size = htobe64(index->packet_size); | |
2389 | ||
2390 | ret = ustctl_get_stream_id(ustream, &index->stream_id); | |
2391 | if (ret < 0) { | |
2392 | PERROR("ustctl_get_stream_id"); | |
2393 | goto error; | |
2394 | } | |
2395 | index->stream_id = htobe64(index->stream_id); | |
2396 | ||
234cd636 JD |
2397 | ret = ustctl_get_instance_id(ustream, &index->stream_instance_id); |
2398 | if (ret < 0) { | |
2399 | PERROR("ustctl_get_instance_id"); | |
2400 | goto error; | |
2401 | } | |
2402 | index->stream_instance_id = htobe64(index->stream_instance_id); | |
2403 | ||
2404 | ret = ustctl_get_sequence_number(ustream, &index->packet_seq_num); | |
2405 | if (ret < 0) { | |
2406 | PERROR("ustctl_get_sequence_number"); | |
2407 | goto error; | |
2408 | } | |
2409 | index->packet_seq_num = htobe64(index->packet_seq_num); | |
2410 | ||
309167d2 JD |
2411 | error: |
2412 | return ret; | |
2413 | } | |
2414 | ||
93ec662e JD |
2415 | static |
2416 | void metadata_stream_reset_cache(struct lttng_consumer_stream *stream, | |
2417 | struct consumer_metadata_cache *cache) | |
2418 | { | |
2419 | DBG("Metadata stream update to version %" PRIu64, | |
2420 | cache->version); | |
2421 | stream->ust_metadata_pushed = 0; | |
2422 | stream->metadata_version = cache->version; | |
2423 | stream->reset_metadata_flag = 1; | |
2424 | } | |
2425 | ||
2426 | /* | |
2427 | * Check if the version of the metadata stream and metadata cache match. | |
2428 | * If the cache got updated, reset the metadata stream. | |
2429 | * The stream lock and metadata cache lock MUST be held. | |
2430 | * Return 0 on success, a negative value on error. | |
2431 | */ | |
2432 | static | |
2433 | int metadata_stream_check_version(struct lttng_consumer_stream *stream) | |
2434 | { | |
2435 | int ret = 0; | |
2436 | struct consumer_metadata_cache *cache = stream->chan->metadata_cache; | |
2437 | ||
2438 | if (cache->version == stream->metadata_version) { | |
2439 | goto end; | |
2440 | } | |
2441 | metadata_stream_reset_cache(stream, cache); | |
2442 | ||
2443 | end: | |
2444 | return ret; | |
2445 | } | |
2446 | ||
94d49140 JD |
2447 | /* |
2448 | * Write up to one packet from the metadata cache to the channel. | |
2449 | * | |
2450 | * Returns the number of bytes pushed in the cache, or a negative value | |
2451 | * on error. | |
2452 | */ | |
2453 | static | |
2454 | int commit_one_metadata_packet(struct lttng_consumer_stream *stream) | |
2455 | { | |
2456 | ssize_t write_len; | |
2457 | int ret; | |
2458 | ||
2459 | pthread_mutex_lock(&stream->chan->metadata_cache->lock); | |
93ec662e JD |
2460 | ret = metadata_stream_check_version(stream); |
2461 | if (ret < 0) { | |
2462 | goto end; | |
2463 | } | |
c585821b | 2464 | if (stream->chan->metadata_cache->max_offset |
94d49140 JD |
2465 | == stream->ust_metadata_pushed) { |
2466 | ret = 0; | |
2467 | goto end; | |
2468 | } | |
2469 | ||
2470 | write_len = ustctl_write_one_packet_to_channel(stream->chan->uchan, | |
2471 | &stream->chan->metadata_cache->data[stream->ust_metadata_pushed], | |
c585821b | 2472 | stream->chan->metadata_cache->max_offset |
94d49140 JD |
2473 | - stream->ust_metadata_pushed); |
2474 | assert(write_len != 0); | |
2475 | if (write_len < 0) { | |
2476 | ERR("Writing one metadata packet"); | |
2477 | ret = -1; | |
2478 | goto end; | |
2479 | } | |
2480 | stream->ust_metadata_pushed += write_len; | |
2481 | ||
c585821b | 2482 | assert(stream->chan->metadata_cache->max_offset >= |
94d49140 JD |
2483 | stream->ust_metadata_pushed); |
2484 | ret = write_len; | |
2485 | ||
2486 | end: | |
2487 | pthread_mutex_unlock(&stream->chan->metadata_cache->lock); | |
2488 | return ret; | |
2489 | } | |
2490 | ||
309167d2 | 2491 | |
94d49140 JD |
2492 | /* |
2493 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
2494 | * metadata thread can consumer them. | |
2495 | * | |
c585821b MD |
2496 | * Metadata stream lock is held here, but we need to release it when |
2497 | * interacting with sessiond, else we cause a deadlock with live | |
2498 | * awaiting on metadata to be pushed out. | |
94d49140 JD |
2499 | * |
2500 | * Return 0 if new metadatda is available, EAGAIN if the metadata stream | |
2501 | * is empty or a negative value on error. | |
2502 | */ | |
2503 | int lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx, | |
2504 | struct lttng_consumer_stream *metadata) | |
2505 | { | |
2506 | int ret; | |
2507 | int retry = 0; | |
2508 | ||
2509 | assert(ctx); | |
2510 | assert(metadata); | |
2511 | ||
c585821b | 2512 | pthread_mutex_unlock(&metadata->lock); |
94d49140 JD |
2513 | /* |
2514 | * Request metadata from the sessiond, but don't wait for the flush | |
2515 | * because we locked the metadata thread. | |
2516 | */ | |
2517 | ret = lttng_ustconsumer_request_metadata(ctx, metadata->chan, 0, 0); | |
1caeb2eb | 2518 | pthread_mutex_lock(&metadata->lock); |
94d49140 JD |
2519 | if (ret < 0) { |
2520 | goto end; | |
2521 | } | |
2522 | ||
2523 | ret = commit_one_metadata_packet(metadata); | |
2524 | if (ret <= 0) { | |
2525 | goto end; | |
2526 | } else if (ret > 0) { | |
2527 | retry = 1; | |
2528 | } | |
2529 | ||
2530 | ustctl_flush_buffer(metadata->ustream, 1); | |
2531 | ret = ustctl_snapshot(metadata->ustream); | |
2532 | if (ret < 0) { | |
2533 | if (errno != EAGAIN) { | |
2534 | ERR("Sync metadata, taking UST snapshot"); | |
2535 | goto end; | |
2536 | } | |
2537 | DBG("No new metadata when syncing them."); | |
2538 | /* No new metadata, exit. */ | |
2539 | ret = ENODATA; | |
2540 | goto end; | |
2541 | } | |
2542 | ||
2543 | /* | |
2544 | * After this flush, we still need to extract metadata. | |
2545 | */ | |
2546 | if (retry) { | |
2547 | ret = EAGAIN; | |
2548 | } | |
2549 | ||
2550 | end: | |
2551 | return ret; | |
2552 | } | |
2553 | ||
02b3d176 DG |
2554 | /* |
2555 | * Return 0 on success else a negative value. | |
2556 | */ | |
2557 | static int notify_if_more_data(struct lttng_consumer_stream *stream, | |
2558 | struct lttng_consumer_local_data *ctx) | |
2559 | { | |
2560 | int ret; | |
2561 | struct ustctl_consumer_stream *ustream; | |
2562 | ||
2563 | assert(stream); | |
2564 | assert(ctx); | |
2565 | ||
2566 | ustream = stream->ustream; | |
2567 | ||
2568 | /* | |
2569 | * First, we are going to check if there is a new subbuffer available | |
2570 | * before reading the stream wait_fd. | |
2571 | */ | |
2572 | /* Get the next subbuffer */ | |
2573 | ret = ustctl_get_next_subbuf(ustream); | |
2574 | if (ret) { | |
2575 | /* No more data found, flag the stream. */ | |
2576 | stream->has_data = 0; | |
2577 | ret = 0; | |
2578 | goto end; | |
2579 | } | |
2580 | ||
5420e5db | 2581 | ret = ustctl_put_subbuf(ustream); |
02b3d176 DG |
2582 | assert(!ret); |
2583 | ||
2584 | /* This stream still has data. Flag it and wake up the data thread. */ | |
2585 | stream->has_data = 1; | |
2586 | ||
2587 | if (stream->monitor && !stream->hangup_flush_done && !ctx->has_wakeup) { | |
2588 | ssize_t writelen; | |
2589 | ||
2590 | writelen = lttng_pipe_write(ctx->consumer_wakeup_pipe, "!", 1); | |
2591 | if (writelen < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { | |
2592 | ret = writelen; | |
2593 | goto end; | |
2594 | } | |
2595 | ||
2596 | /* The wake up pipe has been notified. */ | |
2597 | ctx->has_wakeup = 1; | |
2598 | } | |
2599 | ret = 0; | |
2600 | ||
2601 | end: | |
2602 | return ret; | |
2603 | } | |
2604 | ||
fb83fe64 JD |
2605 | static |
2606 | int update_stream_stats(struct lttng_consumer_stream *stream) | |
2607 | { | |
2608 | int ret; | |
2609 | uint64_t seq, discarded; | |
2610 | ||
2611 | ret = ustctl_get_sequence_number(stream->ustream, &seq); | |
2612 | if (ret < 0) { | |
2613 | PERROR("ustctl_get_sequence_number"); | |
2614 | goto end; | |
2615 | } | |
2616 | /* | |
2617 | * Start the sequence when we extract the first packet in case we don't | |
2618 | * start at 0 (for example if a consumer is not connected to the | |
2619 | * session immediately after the beginning). | |
2620 | */ | |
2621 | if (stream->last_sequence_number == -1ULL) { | |
2622 | stream->last_sequence_number = seq; | |
2623 | } else if (seq > stream->last_sequence_number) { | |
2624 | stream->chan->lost_packets += seq - | |
2625 | stream->last_sequence_number - 1; | |
2626 | } else { | |
2627 | /* seq <= last_sequence_number */ | |
2628 | ERR("Sequence number inconsistent : prev = %" PRIu64 | |
2629 | ", current = %" PRIu64, | |
2630 | stream->last_sequence_number, seq); | |
2631 | ret = -1; | |
2632 | goto end; | |
2633 | } | |
2634 | stream->last_sequence_number = seq; | |
2635 | ||
2636 | ret = ustctl_get_events_discarded(stream->ustream, &discarded); | |
2637 | if (ret < 0) { | |
2638 | PERROR("kernctl_get_events_discarded"); | |
2639 | goto end; | |
2640 | } | |
2641 | if (discarded < stream->last_discarded_events) { | |
2642 | /* | |
83f4233d MJ |
2643 | * Overflow has occurred. We assume only one wrap-around |
2644 | * has occurred. | |
fb83fe64 JD |
2645 | */ |
2646 | stream->chan->discarded_events += | |
2647 | (1ULL << (CAA_BITS_PER_LONG - 1)) - | |
2648 | stream->last_discarded_events + discarded; | |
2649 | } else { | |
2650 | stream->chan->discarded_events += discarded - | |
2651 | stream->last_discarded_events; | |
2652 | } | |
2653 | stream->last_discarded_events = discarded; | |
2654 | ret = 0; | |
2655 | ||
2656 | end: | |
2657 | return ret; | |
2658 | } | |
2659 | ||
94d49140 JD |
2660 | /* |
2661 | * Read subbuffer from the given stream. | |
2662 | * | |
2663 | * Stream lock MUST be acquired. | |
2664 | * | |
2665 | * Return 0 on success else a negative value. | |
2666 | */ | |
d41f73b7 | 2667 | int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
02d02e31 | 2668 | struct lttng_consumer_local_data *ctx, bool *rotated) |
d41f73b7 | 2669 | { |
1d4dfdef | 2670 | unsigned long len, subbuf_size, padding; |
02d02e31 | 2671 | int err, write_index = 1, rotation_ret; |
d41f73b7 | 2672 | long ret = 0; |
ffe60014 | 2673 | struct ustctl_consumer_stream *ustream; |
50adc264 | 2674 | struct ctf_packet_index index; |
ffe60014 DG |
2675 | |
2676 | assert(stream); | |
2677 | assert(stream->ustream); | |
2678 | assert(ctx); | |
d41f73b7 | 2679 | |
3eb914c0 | 2680 | DBG("In UST read_subbuffer (wait_fd: %d, name: %s)", stream->wait_fd, |
ffe60014 DG |
2681 | stream->name); |
2682 | ||
2683 | /* Ease our life for what's next. */ | |
2684 | ustream = stream->ustream; | |
d41f73b7 | 2685 | |
6cd525e8 | 2686 | /* |
02b3d176 DG |
2687 | * We can consume the 1 byte written into the wait_fd by UST. Don't trigger |
2688 | * error if we cannot read this one byte (read returns 0), or if the error | |
2689 | * is EAGAIN or EWOULDBLOCK. | |
2690 | * | |
2691 | * This is only done when the stream is monitored by a thread, before the | |
2692 | * flush is done after a hangup and if the stream is not flagged with data | |
2693 | * since there might be nothing to consume in the wait fd but still have | |
2694 | * data available flagged by the consumer wake up pipe. | |
6cd525e8 | 2695 | */ |
02b3d176 DG |
2696 | if (stream->monitor && !stream->hangup_flush_done && !stream->has_data) { |
2697 | char dummy; | |
c617c0c6 MD |
2698 | ssize_t readlen; |
2699 | ||
6cd525e8 MD |
2700 | readlen = lttng_read(stream->wait_fd, &dummy, 1); |
2701 | if (readlen < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { | |
effcf122 | 2702 | ret = readlen; |
02d02e31 JD |
2703 | goto error; |
2704 | } | |
2705 | } | |
2706 | ||
2707 | /* | |
2708 | * If the stream was flagged to be ready for rotation before we extract the | |
2709 | * next packet, rotate it now. | |
2710 | */ | |
2711 | if (stream->rotate_ready) { | |
2712 | DBG("Rotate stream before extracting data"); | |
2713 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream, rotated); | |
2714 | if (rotation_ret < 0) { | |
2715 | ERR("Stream rotation error"); | |
2716 | ret = -1; | |
2717 | goto error; | |
effcf122 | 2718 | } |
d41f73b7 MD |
2719 | } |
2720 | ||
04ef1097 | 2721 | retry: |
d41f73b7 | 2722 | /* Get the next subbuffer */ |
ffe60014 | 2723 | err = ustctl_get_next_subbuf(ustream); |
d41f73b7 | 2724 | if (err != 0) { |
04ef1097 MD |
2725 | /* |
2726 | * Populate metadata info if the existing info has | |
2727 | * already been read. | |
2728 | */ | |
2729 | if (stream->metadata_flag) { | |
94d49140 JD |
2730 | ret = commit_one_metadata_packet(stream); |
2731 | if (ret <= 0) { | |
02d02e31 | 2732 | goto error; |
04ef1097 | 2733 | } |
04ef1097 MD |
2734 | ustctl_flush_buffer(stream->ustream, 1); |
2735 | goto retry; | |
2736 | } | |
2737 | ||
1d4dfdef | 2738 | ret = err; /* ustctl_get_next_subbuf returns negative, caller expect positive. */ |
d41f73b7 MD |
2739 | /* |
2740 | * This is a debug message even for single-threaded consumer, | |
2741 | * because poll() have more relaxed criterions than get subbuf, | |
2742 | * so get_subbuf may fail for short race windows where poll() | |
2743 | * would issue wakeups. | |
2744 | */ | |
2745 | DBG("Reserving sub buffer failed (everything is normal, " | |
ffe60014 | 2746 | "it is due to concurrency) [ret: %d]", err); |
02d02e31 | 2747 | goto error; |
d41f73b7 | 2748 | } |
ffe60014 | 2749 | assert(stream->chan->output == CONSUMER_CHANNEL_MMAP); |
309167d2 | 2750 | |
1c20f0e2 | 2751 | if (!stream->metadata_flag) { |
309167d2 JD |
2752 | index.offset = htobe64(stream->out_fd_offset); |
2753 | ret = get_index_values(&index, ustream); | |
2754 | if (ret < 0) { | |
7b87473d MD |
2755 | err = ustctl_put_subbuf(ustream); |
2756 | assert(err == 0); | |
02d02e31 | 2757 | goto error; |
309167d2 | 2758 | } |
fb83fe64 JD |
2759 | |
2760 | /* Update the stream's sequence and discarded events count. */ | |
2761 | ret = update_stream_stats(stream); | |
2762 | if (ret < 0) { | |
2763 | PERROR("kernctl_get_events_discarded"); | |
7b87473d MD |
2764 | err = ustctl_put_subbuf(ustream); |
2765 | assert(err == 0); | |
02d02e31 | 2766 | goto error; |
fb83fe64 | 2767 | } |
1c20f0e2 JD |
2768 | } else { |
2769 | write_index = 0; | |
309167d2 JD |
2770 | } |
2771 | ||
1d4dfdef | 2772 | /* Get the full padded subbuffer size */ |
ffe60014 | 2773 | err = ustctl_get_padded_subbuf_size(ustream, &len); |
effcf122 | 2774 | assert(err == 0); |
1d4dfdef DG |
2775 | |
2776 | /* Get subbuffer data size (without padding) */ | |
ffe60014 | 2777 | err = ustctl_get_subbuf_size(ustream, &subbuf_size); |
1d4dfdef DG |
2778 | assert(err == 0); |
2779 | ||
2780 | /* Make sure we don't get a subbuffer size bigger than the padded */ | |
2781 | assert(len >= subbuf_size); | |
2782 | ||
2783 | padding = len - subbuf_size; | |
02d02e31 | 2784 | |
d41f73b7 | 2785 | /* write the subbuffer to the tracefile */ |
309167d2 | 2786 | ret = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, subbuf_size, padding, &index); |
91dfef6e DG |
2787 | /* |
2788 | * The mmap operation should write subbuf_size amount of data when network | |
2789 | * streaming or the full padding (len) size when we are _not_ streaming. | |
2790 | */ | |
d88aee68 DG |
2791 | if ((ret != subbuf_size && stream->net_seq_idx != (uint64_t) -1ULL) || |
2792 | (ret != len && stream->net_seq_idx == (uint64_t) -1ULL)) { | |
d41f73b7 | 2793 | /* |
91dfef6e | 2794 | * Display the error but continue processing to try to release the |
c5c45efa DG |
2795 | * subbuffer. This is a DBG statement since any unexpected kill or |
2796 | * signal, the application gets unregistered, relayd gets closed or | |
2797 | * anything that affects the buffer lifetime will trigger this error. | |
2798 | * So, for the sake of the user, don't print this error since it can | |
2799 | * happen and it is OK with the code flow. | |
d41f73b7 | 2800 | */ |
c5c45efa | 2801 | DBG("Error writing to tracefile " |
8fd623e0 | 2802 | "(ret: %ld != len: %lu != subbuf_size: %lu)", |
91dfef6e | 2803 | ret, len, subbuf_size); |
309167d2 | 2804 | write_index = 0; |
d41f73b7 | 2805 | } |
ffe60014 | 2806 | err = ustctl_put_next_subbuf(ustream); |
effcf122 | 2807 | assert(err == 0); |
331744e3 | 2808 | |
02b3d176 DG |
2809 | /* |
2810 | * This will consumer the byte on the wait_fd if and only if there is not | |
2811 | * next subbuffer to be acquired. | |
2812 | */ | |
2813 | if (!stream->metadata_flag) { | |
2814 | ret = notify_if_more_data(stream, ctx); | |
2815 | if (ret < 0) { | |
02d02e31 | 2816 | goto error; |
02b3d176 DG |
2817 | } |
2818 | } | |
2819 | ||
309167d2 | 2820 | /* Write index if needed. */ |
1c20f0e2 | 2821 | if (!write_index) { |
02d02e31 | 2822 | goto rotate; |
1c20f0e2 JD |
2823 | } |
2824 | ||
94d49140 JD |
2825 | if (stream->chan->live_timer_interval && !stream->metadata_flag) { |
2826 | /* | |
2827 | * In live, block until all the metadata is sent. | |
2828 | */ | |
c585821b MD |
2829 | pthread_mutex_lock(&stream->metadata_timer_lock); |
2830 | assert(!stream->missed_metadata_flush); | |
2831 | stream->waiting_on_metadata = true; | |
2832 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
2833 | ||
94d49140 | 2834 | err = consumer_stream_sync_metadata(ctx, stream->session_id); |
c585821b MD |
2835 | |
2836 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
2837 | stream->waiting_on_metadata = false; | |
2838 | if (stream->missed_metadata_flush) { | |
2839 | stream->missed_metadata_flush = false; | |
2840 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
2841 | (void) consumer_flush_ust_index(stream); | |
2842 | } else { | |
2843 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
2844 | } | |
2845 | ||
94d49140 | 2846 | if (err < 0) { |
02d02e31 | 2847 | goto error; |
94d49140 JD |
2848 | } |
2849 | } | |
2850 | ||
1c20f0e2 JD |
2851 | assert(!stream->metadata_flag); |
2852 | err = consumer_stream_write_index(stream, &index); | |
2853 | if (err < 0) { | |
02d02e31 | 2854 | goto error; |
309167d2 JD |
2855 | } |
2856 | ||
02d02e31 JD |
2857 | rotate: |
2858 | /* | |
2859 | * After extracting the packet, we check if the stream is now ready to be | |
2860 | * rotated and perform the action immediately. | |
2861 | */ | |
2862 | rotation_ret = lttng_consumer_stream_is_rotate_ready(stream); | |
2863 | if (rotation_ret == 1) { | |
2864 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream, rotated); | |
2865 | if (rotation_ret < 0) { | |
2866 | ERR("Stream rotation error"); | |
2867 | ret = -1; | |
2868 | goto error; | |
2869 | } | |
2870 | } else if (rotation_ret < 0) { | |
2871 | ERR("Checking if stream is ready to rotate"); | |
2872 | ret = -1; | |
2873 | goto error; | |
2874 | } | |
2875 | error: | |
d41f73b7 MD |
2876 | return ret; |
2877 | } | |
2878 | ||
ffe60014 DG |
2879 | /* |
2880 | * Called when a stream is created. | |
fe4477ee JD |
2881 | * |
2882 | * Return 0 on success or else a negative value. | |
ffe60014 | 2883 | */ |
d41f73b7 MD |
2884 | int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream) |
2885 | { | |
fe4477ee JD |
2886 | int ret; |
2887 | ||
10a50311 JD |
2888 | assert(stream); |
2889 | ||
fe4477ee | 2890 | /* Don't create anything if this is set for streaming. */ |
10a50311 | 2891 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor) { |
fe4477ee JD |
2892 | ret = utils_create_stream_file(stream->chan->pathname, stream->name, |
2893 | stream->chan->tracefile_size, stream->tracefile_count_current, | |
309167d2 | 2894 | stream->uid, stream->gid, NULL); |
fe4477ee JD |
2895 | if (ret < 0) { |
2896 | goto error; | |
2897 | } | |
2898 | stream->out_fd = ret; | |
2899 | stream->tracefile_size_current = 0; | |
309167d2 JD |
2900 | |
2901 | if (!stream->metadata_flag) { | |
f8f3885c MD |
2902 | struct lttng_index_file *index_file; |
2903 | ||
2904 | index_file = lttng_index_file_create(stream->chan->pathname, | |
309167d2 JD |
2905 | stream->name, stream->uid, stream->gid, |
2906 | stream->chan->tracefile_size, | |
f8f3885c MD |
2907 | stream->tracefile_count_current, |
2908 | CTF_INDEX_MAJOR, CTF_INDEX_MINOR); | |
2909 | if (!index_file) { | |
309167d2 JD |
2910 | goto error; |
2911 | } | |
1b47ae58 | 2912 | assert(!stream->index_file); |
f8f3885c | 2913 | stream->index_file = index_file; |
309167d2 | 2914 | } |
fe4477ee JD |
2915 | } |
2916 | ret = 0; | |
2917 | ||
2918 | error: | |
2919 | return ret; | |
d41f73b7 | 2920 | } |
ca22feea DG |
2921 | |
2922 | /* | |
2923 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
2924 | * stream. Consumer data lock MUST be acquired before calling this function |
2925 | * and the stream lock. | |
ca22feea | 2926 | * |
6d805429 | 2927 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
2928 | * data is available for trace viewer reading. |
2929 | */ | |
6d805429 | 2930 | int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
2931 | { |
2932 | int ret; | |
2933 | ||
2934 | assert(stream); | |
ffe60014 | 2935 | assert(stream->ustream); |
ca22feea | 2936 | |
6d805429 | 2937 | DBG("UST consumer checking data pending"); |
c8f59ee5 | 2938 | |
ca6b395f MD |
2939 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
2940 | ret = 0; | |
2941 | goto end; | |
2942 | } | |
2943 | ||
04ef1097 | 2944 | if (stream->chan->type == CONSUMER_CHANNEL_TYPE_METADATA) { |
e6ee4eab DG |
2945 | uint64_t contiguous, pushed; |
2946 | ||
2947 | /* Ease our life a bit. */ | |
c585821b | 2948 | contiguous = stream->chan->metadata_cache->max_offset; |
e6ee4eab DG |
2949 | pushed = stream->ust_metadata_pushed; |
2950 | ||
04ef1097 MD |
2951 | /* |
2952 | * We can simply check whether all contiguously available data | |
2953 | * has been pushed to the ring buffer, since the push operation | |
2954 | * is performed within get_next_subbuf(), and because both | |
2955 | * get_next_subbuf() and put_next_subbuf() are issued atomically | |
2956 | * thanks to the stream lock within | |
2957 | * lttng_ustconsumer_read_subbuffer(). This basically means that | |
2958 | * whetnever ust_metadata_pushed is incremented, the associated | |
2959 | * metadata has been consumed from the metadata stream. | |
2960 | */ | |
2961 | DBG("UST consumer metadata pending check: contiguous %" PRIu64 " vs pushed %" PRIu64, | |
e6ee4eab | 2962 | contiguous, pushed); |
aa01b94c | 2963 | assert(((int64_t) (contiguous - pushed)) >= 0); |
e6ee4eab | 2964 | if ((contiguous != pushed) || |
6acdf328 | 2965 | (((int64_t) contiguous - pushed) > 0 || contiguous == 0)) { |
04ef1097 MD |
2966 | ret = 1; /* Data is pending */ |
2967 | goto end; | |
2968 | } | |
2969 | } else { | |
2970 | ret = ustctl_get_next_subbuf(stream->ustream); | |
2971 | if (ret == 0) { | |
2972 | /* | |
2973 | * There is still data so let's put back this | |
2974 | * subbuffer. | |
2975 | */ | |
2976 | ret = ustctl_put_subbuf(stream->ustream); | |
2977 | assert(ret == 0); | |
2978 | ret = 1; /* Data is pending */ | |
2979 | goto end; | |
2980 | } | |
ca22feea DG |
2981 | } |
2982 | ||
6d805429 DG |
2983 | /* Data is NOT pending so ready to be read. */ |
2984 | ret = 0; | |
ca22feea | 2985 | |
6efae65e DG |
2986 | end: |
2987 | return ret; | |
ca22feea | 2988 | } |
d88aee68 | 2989 | |
6d574024 DG |
2990 | /* |
2991 | * Stop a given metadata channel timer if enabled and close the wait fd which | |
2992 | * is the poll pipe of the metadata stream. | |
2993 | * | |
2994 | * This MUST be called with the metadata channel acquired. | |
2995 | */ | |
2996 | void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata) | |
2997 | { | |
2998 | int ret; | |
2999 | ||
3000 | assert(metadata); | |
3001 | assert(metadata->type == CONSUMER_CHANNEL_TYPE_METADATA); | |
3002 | ||
3003 | DBG("Closing metadata channel key %" PRIu64, metadata->key); | |
3004 | ||
3005 | if (metadata->switch_timer_enabled == 1) { | |
3006 | consumer_timer_switch_stop(metadata); | |
3007 | } | |
3008 | ||
3009 | if (!metadata->metadata_stream) { | |
3010 | goto end; | |
3011 | } | |
3012 | ||
3013 | /* | |
3014 | * Closing write side so the thread monitoring the stream wakes up if any | |
3015 | * and clean the metadata stream. | |
3016 | */ | |
3017 | if (metadata->metadata_stream->ust_metadata_poll_pipe[1] >= 0) { | |
3018 | ret = close(metadata->metadata_stream->ust_metadata_poll_pipe[1]); | |
3019 | if (ret < 0) { | |
3020 | PERROR("closing metadata pipe write side"); | |
3021 | } | |
3022 | metadata->metadata_stream->ust_metadata_poll_pipe[1] = -1; | |
3023 | } | |
3024 | ||
3025 | end: | |
3026 | return; | |
3027 | } | |
3028 | ||
d88aee68 DG |
3029 | /* |
3030 | * Close every metadata stream wait fd of the metadata hash table. This | |
3031 | * function MUST be used very carefully so not to run into a race between the | |
3032 | * metadata thread handling streams and this function closing their wait fd. | |
3033 | * | |
3034 | * For UST, this is used when the session daemon hangs up. Its the metadata | |
3035 | * producer so calling this is safe because we are assured that no state change | |
3036 | * can occur in the metadata thread for the streams in the hash table. | |
3037 | */ | |
6d574024 | 3038 | void lttng_ustconsumer_close_all_metadata(struct lttng_ht *metadata_ht) |
d88aee68 | 3039 | { |
d88aee68 DG |
3040 | struct lttng_ht_iter iter; |
3041 | struct lttng_consumer_stream *stream; | |
3042 | ||
3043 | assert(metadata_ht); | |
3044 | assert(metadata_ht->ht); | |
3045 | ||
3046 | DBG("UST consumer closing all metadata streams"); | |
3047 | ||
3048 | rcu_read_lock(); | |
3049 | cds_lfht_for_each_entry(metadata_ht->ht, &iter.iter, stream, | |
3050 | node.node) { | |
9ce5646a MD |
3051 | |
3052 | health_code_update(); | |
3053 | ||
be2b50c7 | 3054 | pthread_mutex_lock(&stream->chan->lock); |
6d574024 | 3055 | lttng_ustconsumer_close_metadata(stream->chan); |
be2b50c7 DG |
3056 | pthread_mutex_unlock(&stream->chan->lock); |
3057 | ||
d88aee68 DG |
3058 | } |
3059 | rcu_read_unlock(); | |
3060 | } | |
d8ef542d MD |
3061 | |
3062 | void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream) | |
3063 | { | |
3064 | int ret; | |
3065 | ||
3066 | ret = ustctl_stream_close_wakeup_fd(stream->ustream); | |
3067 | if (ret < 0) { | |
3068 | ERR("Unable to close wakeup fd"); | |
3069 | } | |
3070 | } | |
331744e3 | 3071 | |
f666ae70 MD |
3072 | /* |
3073 | * Please refer to consumer-timer.c before adding any lock within this | |
3074 | * function or any of its callees. Timers have a very strict locking | |
3075 | * semantic with respect to teardown. Failure to respect this semantic | |
3076 | * introduces deadlocks. | |
c585821b MD |
3077 | * |
3078 | * DON'T hold the metadata lock when calling this function, else this | |
3079 | * can cause deadlock involving consumer awaiting for metadata to be | |
3080 | * pushed out due to concurrent interaction with the session daemon. | |
f666ae70 | 3081 | */ |
331744e3 | 3082 | int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx, |
94d49140 | 3083 | struct lttng_consumer_channel *channel, int timer, int wait) |
331744e3 JD |
3084 | { |
3085 | struct lttcomm_metadata_request_msg request; | |
3086 | struct lttcomm_consumer_msg msg; | |
0c759fc9 | 3087 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
93ec662e | 3088 | uint64_t len, key, offset, version; |
331744e3 JD |
3089 | int ret; |
3090 | ||
3091 | assert(channel); | |
3092 | assert(channel->metadata_cache); | |
3093 | ||
53efb85a MD |
3094 | memset(&request, 0, sizeof(request)); |
3095 | ||
331744e3 JD |
3096 | /* send the metadata request to sessiond */ |
3097 | switch (consumer_data.type) { | |
3098 | case LTTNG_CONSUMER64_UST: | |
3099 | request.bits_per_long = 64; | |
3100 | break; | |
3101 | case LTTNG_CONSUMER32_UST: | |
3102 | request.bits_per_long = 32; | |
3103 | break; | |
3104 | default: | |
3105 | request.bits_per_long = 0; | |
3106 | break; | |
3107 | } | |
3108 | ||
3109 | request.session_id = channel->session_id; | |
1950109e | 3110 | request.session_id_per_pid = channel->session_id_per_pid; |
567eb353 DG |
3111 | /* |
3112 | * Request the application UID here so the metadata of that application can | |
3113 | * be sent back. The channel UID corresponds to the user UID of the session | |
3114 | * used for the rights on the stream file(s). | |
3115 | */ | |
3116 | request.uid = channel->ust_app_uid; | |
331744e3 | 3117 | request.key = channel->key; |
567eb353 | 3118 | |
1950109e | 3119 | DBG("Sending metadata request to sessiond, session id %" PRIu64 |
567eb353 DG |
3120 | ", per-pid %" PRIu64 ", app UID %u and channek key %" PRIu64, |
3121 | request.session_id, request.session_id_per_pid, request.uid, | |
3122 | request.key); | |
331744e3 | 3123 | |
75d83e50 | 3124 | pthread_mutex_lock(&ctx->metadata_socket_lock); |
9ce5646a MD |
3125 | |
3126 | health_code_update(); | |
3127 | ||
331744e3 JD |
3128 | ret = lttcomm_send_unix_sock(ctx->consumer_metadata_socket, &request, |
3129 | sizeof(request)); | |
3130 | if (ret < 0) { | |
3131 | ERR("Asking metadata to sessiond"); | |
3132 | goto end; | |
3133 | } | |
3134 | ||
9ce5646a MD |
3135 | health_code_update(); |
3136 | ||
331744e3 JD |
3137 | /* Receive the metadata from sessiond */ |
3138 | ret = lttcomm_recv_unix_sock(ctx->consumer_metadata_socket, &msg, | |
3139 | sizeof(msg)); | |
3140 | if (ret != sizeof(msg)) { | |
8fd623e0 | 3141 | DBG("Consumer received unexpected message size %d (expects %zu)", |
331744e3 JD |
3142 | ret, sizeof(msg)); |
3143 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); | |
3144 | /* | |
3145 | * The ret value might 0 meaning an orderly shutdown but this is ok | |
3146 | * since the caller handles this. | |
3147 | */ | |
3148 | goto end; | |
3149 | } | |
3150 | ||
9ce5646a MD |
3151 | health_code_update(); |
3152 | ||
331744e3 JD |
3153 | if (msg.cmd_type == LTTNG_ERR_UND) { |
3154 | /* No registry found */ | |
3155 | (void) consumer_send_status_msg(ctx->consumer_metadata_socket, | |
3156 | ret_code); | |
3157 | ret = 0; | |
3158 | goto end; | |
3159 | } else if (msg.cmd_type != LTTNG_CONSUMER_PUSH_METADATA) { | |
3160 | ERR("Unexpected cmd_type received %d", msg.cmd_type); | |
3161 | ret = -1; | |
3162 | goto end; | |
3163 | } | |
3164 | ||
3165 | len = msg.u.push_metadata.len; | |
3166 | key = msg.u.push_metadata.key; | |
3167 | offset = msg.u.push_metadata.target_offset; | |
93ec662e | 3168 | version = msg.u.push_metadata.version; |
331744e3 JD |
3169 | |
3170 | assert(key == channel->key); | |
3171 | if (len == 0) { | |
3172 | DBG("No new metadata to receive for key %" PRIu64, key); | |
3173 | } | |
3174 | ||
9ce5646a MD |
3175 | health_code_update(); |
3176 | ||
331744e3 JD |
3177 | /* Tell session daemon we are ready to receive the metadata. */ |
3178 | ret = consumer_send_status_msg(ctx->consumer_metadata_socket, | |
0c759fc9 | 3179 | LTTCOMM_CONSUMERD_SUCCESS); |
331744e3 JD |
3180 | if (ret < 0 || len == 0) { |
3181 | /* | |
3182 | * Somehow, the session daemon is not responding anymore or there is | |
3183 | * nothing to receive. | |
3184 | */ | |
3185 | goto end; | |
3186 | } | |
3187 | ||
9ce5646a MD |
3188 | health_code_update(); |
3189 | ||
1eb682be | 3190 | ret = lttng_ustconsumer_recv_metadata(ctx->consumer_metadata_socket, |
93ec662e | 3191 | key, offset, len, version, channel, timer, wait); |
1eb682be | 3192 | if (ret >= 0) { |
f2a444f1 DG |
3193 | /* |
3194 | * Only send the status msg if the sessiond is alive meaning a positive | |
3195 | * ret code. | |
3196 | */ | |
1eb682be | 3197 | (void) consumer_send_status_msg(ctx->consumer_metadata_socket, ret); |
f2a444f1 | 3198 | } |
331744e3 JD |
3199 | ret = 0; |
3200 | ||
3201 | end: | |
9ce5646a MD |
3202 | health_code_update(); |
3203 | ||
75d83e50 | 3204 | pthread_mutex_unlock(&ctx->metadata_socket_lock); |
331744e3 JD |
3205 | return ret; |
3206 | } | |
70190e1c DG |
3207 | |
3208 | /* | |
3209 | * Return the ustctl call for the get stream id. | |
3210 | */ | |
3211 | int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream, | |
3212 | uint64_t *stream_id) | |
3213 | { | |
3214 | assert(stream); | |
3215 | assert(stream_id); | |
3216 | ||
3217 | return ustctl_get_stream_id(stream->ustream, stream_id); | |
3218 | } |