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 | /* | |
a3a86f35 | 543 | * Send channel to sessiond and relayd if applicable. |
ffe60014 | 544 | * |
d88aee68 | 545 | * Return 0 on success or else a negative value. |
ffe60014 | 546 | */ |
a3a86f35 | 547 | static int send_channel_to_sessiond_and_relayd(int sock, |
ffe60014 DG |
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 | 566 | /* Try to send the stream to the relayd if one is available. */ |
a3a86f35 JG |
567 | DBG("Sending stream %" PRIu64 " of channel \"%s\" to relayd", |
568 | stream->key, channel->name); | |
62285ea4 DG |
569 | ret = consumer_send_relayd_stream(stream, stream->chan->pathname); |
570 | if (ret < 0) { | |
571 | /* | |
572 | * Flag that the relayd was the problem here probably due to a | |
573 | * communicaton error on the socket. | |
574 | */ | |
575 | if (relayd_error) { | |
576 | *relayd_error = 1; | |
577 | } | |
725d28b2 | 578 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
ffe60014 | 579 | } |
a4baae1b JD |
580 | if (net_seq_idx == -1ULL) { |
581 | net_seq_idx = stream->net_seq_idx; | |
582 | } | |
583 | } | |
f2a444f1 | 584 | } |
ffe60014 | 585 | |
f2a444f1 DG |
586 | /* Inform sessiond that we are about to send channel and streams. */ |
587 | ret = consumer_send_status_msg(sock, ret_code); | |
0c759fc9 | 588 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
f2a444f1 DG |
589 | /* |
590 | * Either the session daemon is not responding or the relayd died so we | |
591 | * stop now. | |
592 | */ | |
593 | goto error; | |
594 | } | |
595 | ||
596 | /* Send channel to sessiond. */ | |
597 | ret = ustctl_send_channel_to_sessiond(sock, channel->uchan); | |
598 | if (ret < 0) { | |
599 | goto error; | |
600 | } | |
601 | ||
602 | ret = ustctl_channel_close_wakeup_fd(channel->uchan); | |
603 | if (ret < 0) { | |
604 | goto error; | |
605 | } | |
606 | ||
607 | /* The channel was sent successfully to the sessiond at this point. */ | |
608 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { | |
9ce5646a MD |
609 | |
610 | health_code_update(); | |
611 | ||
ffe60014 DG |
612 | /* Send stream to session daemon. */ |
613 | ret = send_sessiond_stream(sock, stream); | |
614 | if (ret < 0) { | |
615 | goto error; | |
616 | } | |
617 | } | |
618 | ||
619 | /* Tell sessiond there is no more stream. */ | |
620 | ret = ustctl_send_stream_to_sessiond(sock, NULL); | |
621 | if (ret < 0) { | |
622 | goto error; | |
623 | } | |
624 | ||
625 | DBG("UST consumer NULL stream sent to sessiond"); | |
626 | ||
627 | return 0; | |
628 | ||
629 | error: | |
0c759fc9 | 630 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
f2a444f1 DG |
631 | ret = -1; |
632 | } | |
ffe60014 DG |
633 | return ret; |
634 | } | |
635 | ||
636 | /* | |
637 | * Creates a channel and streams and add the channel it to the channel internal | |
638 | * state. The created stream must ONLY be sent once the GET_CHANNEL command is | |
639 | * received. | |
640 | * | |
641 | * Return 0 on success or else, a negative value is returned and the channel | |
642 | * MUST be destroyed by consumer_del_channel(). | |
643 | */ | |
644 | static int ask_channel(struct lttng_consumer_local_data *ctx, int sock, | |
645 | struct lttng_consumer_channel *channel, | |
646 | struct ustctl_consumer_channel_attr *attr) | |
3bd1e081 MD |
647 | { |
648 | int ret; | |
649 | ||
ffe60014 DG |
650 | assert(ctx); |
651 | assert(channel); | |
652 | assert(attr); | |
653 | ||
654 | /* | |
655 | * This value is still used by the kernel consumer since for the kernel, | |
656 | * the stream ownership is not IN the consumer so we need to have the | |
657 | * number of left stream that needs to be initialized so we can know when | |
658 | * to delete the channel (see consumer.c). | |
659 | * | |
660 | * As for the user space tracer now, the consumer creates and sends the | |
661 | * stream to the session daemon which only sends them to the application | |
662 | * once every stream of a channel is received making this value useless | |
663 | * because we they will be added to the poll thread before the application | |
664 | * receives them. This ensures that a stream can not hang up during | |
665 | * initilization of a channel. | |
666 | */ | |
667 | channel->nb_init_stream_left = 0; | |
668 | ||
669 | /* The reply msg status is handled in the following call. */ | |
4628484a | 670 | ret = create_ust_channel(channel, attr, &channel->uchan); |
ffe60014 | 671 | if (ret < 0) { |
10a50311 | 672 | goto end; |
3bd1e081 MD |
673 | } |
674 | ||
d8ef542d MD |
675 | channel->wait_fd = ustctl_channel_get_wait_fd(channel->uchan); |
676 | ||
10a50311 JD |
677 | /* |
678 | * For the snapshots (no monitor), we create the metadata streams | |
679 | * on demand, not during the channel creation. | |
680 | */ | |
681 | if (channel->type == CONSUMER_CHANNEL_TYPE_METADATA && !channel->monitor) { | |
682 | ret = 0; | |
683 | goto end; | |
684 | } | |
685 | ||
ffe60014 DG |
686 | /* Open all streams for this channel. */ |
687 | ret = create_ust_streams(channel, ctx); | |
688 | if (ret < 0) { | |
10a50311 | 689 | goto end; |
ffe60014 DG |
690 | } |
691 | ||
10a50311 | 692 | end: |
3bd1e081 MD |
693 | return ret; |
694 | } | |
695 | ||
d88aee68 DG |
696 | /* |
697 | * Send all stream of a channel to the right thread handling it. | |
698 | * | |
699 | * On error, return a negative value else 0 on success. | |
700 | */ | |
701 | static int send_streams_to_thread(struct lttng_consumer_channel *channel, | |
702 | struct lttng_consumer_local_data *ctx) | |
703 | { | |
704 | int ret = 0; | |
705 | struct lttng_consumer_stream *stream, *stmp; | |
706 | ||
707 | assert(channel); | |
708 | assert(ctx); | |
709 | ||
710 | /* Send streams to the corresponding thread. */ | |
711 | cds_list_for_each_entry_safe(stream, stmp, &channel->streams.head, | |
712 | send_node) { | |
9ce5646a MD |
713 | |
714 | health_code_update(); | |
715 | ||
d88aee68 DG |
716 | /* Sending the stream to the thread. */ |
717 | ret = send_stream_to_thread(stream, ctx); | |
718 | if (ret < 0) { | |
719 | /* | |
720 | * If we are unable to send the stream to the thread, there is | |
721 | * a big problem so just stop everything. | |
722 | */ | |
723 | goto error; | |
724 | } | |
d88aee68 DG |
725 | } |
726 | ||
727 | error: | |
728 | return ret; | |
729 | } | |
730 | ||
7972aab2 DG |
731 | /* |
732 | * Flush channel's streams using the given key to retrieve the channel. | |
733 | * | |
734 | * Return 0 on success else an LTTng error code. | |
735 | */ | |
736 | static int flush_channel(uint64_t chan_key) | |
737 | { | |
738 | int ret = 0; | |
739 | struct lttng_consumer_channel *channel; | |
740 | struct lttng_consumer_stream *stream; | |
741 | struct lttng_ht *ht; | |
742 | struct lttng_ht_iter iter; | |
743 | ||
8fd623e0 | 744 | DBG("UST consumer flush channel key %" PRIu64, chan_key); |
7972aab2 | 745 | |
a500c257 | 746 | rcu_read_lock(); |
7972aab2 DG |
747 | channel = consumer_find_channel(chan_key); |
748 | if (!channel) { | |
8fd623e0 | 749 | ERR("UST consumer flush channel %" PRIu64 " not found", chan_key); |
7972aab2 DG |
750 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
751 | goto error; | |
752 | } | |
753 | ||
754 | ht = consumer_data.stream_per_chan_id_ht; | |
755 | ||
756 | /* For each stream of the channel id, flush it. */ | |
7972aab2 DG |
757 | cds_lfht_for_each_entry_duplicate(ht->ht, |
758 | ht->hash_fct(&channel->key, lttng_ht_seed), ht->match_fct, | |
759 | &channel->key, &iter.iter, stream, node_channel_id.node) { | |
9ce5646a MD |
760 | |
761 | health_code_update(); | |
762 | ||
0dd01979 MD |
763 | pthread_mutex_lock(&stream->lock); |
764 | if (!stream->quiescent) { | |
765 | ustctl_flush_buffer(stream->ustream, 0); | |
766 | stream->quiescent = true; | |
767 | } | |
768 | pthread_mutex_unlock(&stream->lock); | |
769 | } | |
770 | error: | |
771 | rcu_read_unlock(); | |
772 | return ret; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Clear quiescent state from channel's streams using the given key to | |
777 | * retrieve the channel. | |
778 | * | |
779 | * Return 0 on success else an LTTng error code. | |
780 | */ | |
781 | static int clear_quiescent_channel(uint64_t chan_key) | |
782 | { | |
783 | int ret = 0; | |
784 | struct lttng_consumer_channel *channel; | |
785 | struct lttng_consumer_stream *stream; | |
786 | struct lttng_ht *ht; | |
787 | struct lttng_ht_iter iter; | |
788 | ||
789 | DBG("UST consumer clear quiescent channel key %" PRIu64, chan_key); | |
790 | ||
791 | rcu_read_lock(); | |
792 | channel = consumer_find_channel(chan_key); | |
793 | if (!channel) { | |
794 | ERR("UST consumer clear quiescent channel %" PRIu64 " not found", chan_key); | |
795 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
796 | goto error; | |
797 | } | |
798 | ||
799 | ht = consumer_data.stream_per_chan_id_ht; | |
800 | ||
801 | /* For each stream of the channel id, clear quiescent state. */ | |
802 | cds_lfht_for_each_entry_duplicate(ht->ht, | |
803 | ht->hash_fct(&channel->key, lttng_ht_seed), ht->match_fct, | |
804 | &channel->key, &iter.iter, stream, node_channel_id.node) { | |
805 | ||
806 | health_code_update(); | |
807 | ||
808 | pthread_mutex_lock(&stream->lock); | |
809 | stream->quiescent = false; | |
810 | pthread_mutex_unlock(&stream->lock); | |
7972aab2 | 811 | } |
7972aab2 | 812 | error: |
a500c257 | 813 | rcu_read_unlock(); |
7972aab2 DG |
814 | return ret; |
815 | } | |
816 | ||
d88aee68 DG |
817 | /* |
818 | * Close metadata stream wakeup_fd using the given key to retrieve the channel. | |
a500c257 | 819 | * RCU read side lock MUST be acquired before calling this function. |
d88aee68 DG |
820 | * |
821 | * Return 0 on success else an LTTng error code. | |
822 | */ | |
823 | static int close_metadata(uint64_t chan_key) | |
824 | { | |
ea88ca2a | 825 | int ret = 0; |
d88aee68 | 826 | struct lttng_consumer_channel *channel; |
f65a74be | 827 | unsigned int channel_monitor; |
d88aee68 | 828 | |
8fd623e0 | 829 | DBG("UST consumer close metadata key %" PRIu64, chan_key); |
d88aee68 DG |
830 | |
831 | channel = consumer_find_channel(chan_key); | |
832 | if (!channel) { | |
84cc9aa0 DG |
833 | /* |
834 | * This is possible if the metadata thread has issue a delete because | |
835 | * the endpoint point of the stream hung up. There is no way the | |
836 | * session daemon can know about it thus use a DBG instead of an actual | |
837 | * error. | |
838 | */ | |
839 | DBG("UST consumer close metadata %" PRIu64 " not found", chan_key); | |
d88aee68 DG |
840 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; |
841 | goto error; | |
842 | } | |
843 | ||
ea88ca2a | 844 | pthread_mutex_lock(&consumer_data.lock); |
a9838785 | 845 | pthread_mutex_lock(&channel->lock); |
f65a74be | 846 | channel_monitor = channel->monitor; |
73811ecc DG |
847 | if (cds_lfht_is_node_deleted(&channel->node.node)) { |
848 | goto error_unlock; | |
849 | } | |
850 | ||
6d574024 | 851 | lttng_ustconsumer_close_metadata(channel); |
f65a74be JG |
852 | pthread_mutex_unlock(&channel->lock); |
853 | pthread_mutex_unlock(&consumer_data.lock); | |
d88aee68 | 854 | |
f65a74be JG |
855 | /* |
856 | * The ownership of a metadata channel depends on the type of | |
857 | * session to which it belongs. In effect, the monitor flag is checked | |
858 | * to determine if this metadata channel is in "snapshot" mode or not. | |
859 | * | |
860 | * In the non-snapshot case, the metadata channel is created along with | |
861 | * a single stream which will remain present until the metadata channel | |
862 | * is destroyed (on the destruction of its session). In this case, the | |
863 | * metadata stream in "monitored" by the metadata poll thread and holds | |
864 | * the ownership of its channel. | |
865 | * | |
866 | * Closing the metadata will cause the metadata stream's "metadata poll | |
867 | * pipe" to be closed. Closing this pipe will wake-up the metadata poll | |
868 | * thread which will teardown the metadata stream which, in return, | |
869 | * deletes the metadata channel. | |
870 | * | |
871 | * In the snapshot case, the metadata stream is created and destroyed | |
872 | * on every snapshot record. Since the channel doesn't have an owner | |
873 | * other than the session daemon, it is safe to destroy it immediately | |
874 | * on reception of the CLOSE_METADATA command. | |
875 | */ | |
876 | if (!channel_monitor) { | |
877 | /* | |
878 | * The channel and consumer_data locks must be | |
879 | * released before this call since consumer_del_channel | |
880 | * re-acquires the channel and consumer_data locks to teardown | |
881 | * the channel and queue its reclamation by the "call_rcu" | |
882 | * worker thread. | |
883 | */ | |
884 | consumer_del_channel(channel); | |
885 | } | |
886 | ||
887 | return ret; | |
ea88ca2a | 888 | error_unlock: |
a9838785 | 889 | pthread_mutex_unlock(&channel->lock); |
ea88ca2a | 890 | pthread_mutex_unlock(&consumer_data.lock); |
d88aee68 DG |
891 | error: |
892 | return ret; | |
893 | } | |
894 | ||
895 | /* | |
896 | * RCU read side lock MUST be acquired before calling this function. | |
897 | * | |
898 | * Return 0 on success else an LTTng error code. | |
899 | */ | |
900 | static int setup_metadata(struct lttng_consumer_local_data *ctx, uint64_t key) | |
901 | { | |
902 | int ret; | |
903 | struct lttng_consumer_channel *metadata; | |
904 | ||
8fd623e0 | 905 | DBG("UST consumer setup metadata key %" PRIu64, key); |
d88aee68 DG |
906 | |
907 | metadata = consumer_find_channel(key); | |
908 | if (!metadata) { | |
909 | ERR("UST consumer push metadata %" PRIu64 " not found", key); | |
910 | ret = LTTNG_ERR_UST_CHAN_NOT_FOUND; | |
10a50311 JD |
911 | goto end; |
912 | } | |
913 | ||
914 | /* | |
915 | * In no monitor mode, the metadata channel has no stream(s) so skip the | |
916 | * ownership transfer to the metadata thread. | |
917 | */ | |
918 | if (!metadata->monitor) { | |
919 | DBG("Metadata channel in no monitor"); | |
920 | ret = 0; | |
921 | goto end; | |
d88aee68 DG |
922 | } |
923 | ||
924 | /* | |
925 | * Send metadata stream to relayd if one available. Availability is | |
926 | * known if the stream is still in the list of the channel. | |
927 | */ | |
928 | if (cds_list_empty(&metadata->streams.head)) { | |
929 | ERR("Metadata channel key %" PRIu64 ", no stream available.", key); | |
930 | ret = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
f5a0c9cf | 931 | goto error_no_stream; |
d88aee68 DG |
932 | } |
933 | ||
934 | /* Send metadata stream to relayd if needed. */ | |
62285ea4 DG |
935 | if (metadata->metadata_stream->net_seq_idx != (uint64_t) -1ULL) { |
936 | ret = consumer_send_relayd_stream(metadata->metadata_stream, | |
937 | metadata->pathname); | |
938 | if (ret < 0) { | |
939 | ret = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
940 | goto error; | |
941 | } | |
601262d6 JD |
942 | ret = consumer_send_relayd_streams_sent( |
943 | metadata->metadata_stream->net_seq_idx); | |
944 | if (ret < 0) { | |
945 | ret = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
946 | goto error; | |
947 | } | |
d88aee68 DG |
948 | } |
949 | ||
a8086cf4 JR |
950 | /* |
951 | * Ownership of metadata stream is passed along. Freeing is handled by | |
952 | * the callee. | |
953 | */ | |
d88aee68 DG |
954 | ret = send_streams_to_thread(metadata, ctx); |
955 | if (ret < 0) { | |
956 | /* | |
957 | * If we are unable to send the stream to the thread, there is | |
958 | * a big problem so just stop everything. | |
959 | */ | |
960 | ret = LTTCOMM_CONSUMERD_FATAL; | |
a8086cf4 | 961 | goto send_streams_error; |
d88aee68 DG |
962 | } |
963 | /* List MUST be empty after or else it could be reused. */ | |
964 | assert(cds_list_empty(&metadata->streams.head)); | |
965 | ||
10a50311 JD |
966 | ret = 0; |
967 | goto end; | |
d88aee68 DG |
968 | |
969 | error: | |
f2a444f1 DG |
970 | /* |
971 | * Delete metadata channel on error. At this point, the metadata stream can | |
972 | * NOT be monitored by the metadata thread thus having the guarantee that | |
973 | * the stream is still in the local stream list of the channel. This call | |
974 | * will make sure to clean that list. | |
975 | */ | |
f5a0c9cf | 976 | consumer_stream_destroy(metadata->metadata_stream, NULL); |
212d67a2 DG |
977 | cds_list_del(&metadata->metadata_stream->send_node); |
978 | metadata->metadata_stream = NULL; | |
a8086cf4 | 979 | send_streams_error: |
f5a0c9cf | 980 | error_no_stream: |
10a50311 JD |
981 | end: |
982 | return ret; | |
983 | } | |
984 | ||
985 | /* | |
986 | * Snapshot the whole metadata. | |
987 | * | |
988 | * Returns 0 on success, < 0 on error | |
989 | */ | |
990 | static int snapshot_metadata(uint64_t key, char *path, uint64_t relayd_id, | |
991 | struct lttng_consumer_local_data *ctx) | |
992 | { | |
993 | int ret = 0; | |
10a50311 JD |
994 | struct lttng_consumer_channel *metadata_channel; |
995 | struct lttng_consumer_stream *metadata_stream; | |
996 | ||
997 | assert(path); | |
998 | assert(ctx); | |
999 | ||
1000 | DBG("UST consumer snapshot metadata with key %" PRIu64 " at path %s", | |
1001 | key, path); | |
1002 | ||
1003 | rcu_read_lock(); | |
1004 | ||
1005 | metadata_channel = consumer_find_channel(key); | |
1006 | if (!metadata_channel) { | |
6a00837f MD |
1007 | ERR("UST snapshot metadata channel not found for key %" PRIu64, |
1008 | key); | |
10a50311 JD |
1009 | ret = -1; |
1010 | goto error; | |
1011 | } | |
1012 | assert(!metadata_channel->monitor); | |
1013 | ||
9ce5646a MD |
1014 | health_code_update(); |
1015 | ||
10a50311 JD |
1016 | /* |
1017 | * Ask the sessiond if we have new metadata waiting and update the | |
1018 | * consumer metadata cache. | |
1019 | */ | |
94d49140 | 1020 | ret = lttng_ustconsumer_request_metadata(ctx, metadata_channel, 0, 1); |
10a50311 JD |
1021 | if (ret < 0) { |
1022 | goto error; | |
1023 | } | |
1024 | ||
9ce5646a MD |
1025 | health_code_update(); |
1026 | ||
10a50311 JD |
1027 | /* |
1028 | * The metadata stream is NOT created in no monitor mode when the channel | |
1029 | * is created on a sessiond ask channel command. | |
1030 | */ | |
1031 | ret = create_ust_streams(metadata_channel, ctx); | |
1032 | if (ret < 0) { | |
1033 | goto error; | |
1034 | } | |
1035 | ||
1036 | metadata_stream = metadata_channel->metadata_stream; | |
1037 | assert(metadata_stream); | |
1038 | ||
1039 | if (relayd_id != (uint64_t) -1ULL) { | |
1040 | metadata_stream->net_seq_idx = relayd_id; | |
1041 | ret = consumer_send_relayd_stream(metadata_stream, path); | |
1042 | if (ret < 0) { | |
1043 | goto error_stream; | |
1044 | } | |
1045 | } else { | |
1046 | ret = utils_create_stream_file(path, metadata_stream->name, | |
1047 | metadata_stream->chan->tracefile_size, | |
1048 | metadata_stream->tracefile_count_current, | |
309167d2 | 1049 | metadata_stream->uid, metadata_stream->gid, NULL); |
10a50311 JD |
1050 | if (ret < 0) { |
1051 | goto error_stream; | |
1052 | } | |
1053 | metadata_stream->out_fd = ret; | |
1054 | metadata_stream->tracefile_size_current = 0; | |
1055 | } | |
1056 | ||
04ef1097 | 1057 | do { |
9ce5646a MD |
1058 | health_code_update(); |
1059 | ||
10a50311 JD |
1060 | ret = lttng_consumer_read_subbuffer(metadata_stream, ctx); |
1061 | if (ret < 0) { | |
94d49140 | 1062 | goto error_stream; |
10a50311 | 1063 | } |
04ef1097 | 1064 | } while (ret > 0); |
10a50311 | 1065 | |
10a50311 JD |
1066 | error_stream: |
1067 | /* | |
1068 | * Clean up the stream completly because the next snapshot will use a new | |
1069 | * metadata stream. | |
1070 | */ | |
10a50311 | 1071 | consumer_stream_destroy(metadata_stream, NULL); |
212d67a2 | 1072 | cds_list_del(&metadata_stream->send_node); |
10a50311 JD |
1073 | metadata_channel->metadata_stream = NULL; |
1074 | ||
1075 | error: | |
1076 | rcu_read_unlock(); | |
1077 | return ret; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Take a snapshot of all the stream of a channel. | |
1082 | * | |
1083 | * Returns 0 on success, < 0 on error | |
1084 | */ | |
1085 | static int snapshot_channel(uint64_t key, char *path, uint64_t relayd_id, | |
d07ceecd | 1086 | uint64_t nb_packets_per_stream, struct lttng_consumer_local_data *ctx) |
10a50311 JD |
1087 | { |
1088 | int ret; | |
1089 | unsigned use_relayd = 0; | |
1090 | unsigned long consumed_pos, produced_pos; | |
1091 | struct lttng_consumer_channel *channel; | |
1092 | struct lttng_consumer_stream *stream; | |
1093 | ||
1094 | assert(path); | |
1095 | assert(ctx); | |
1096 | ||
1097 | rcu_read_lock(); | |
1098 | ||
1099 | if (relayd_id != (uint64_t) -1ULL) { | |
1100 | use_relayd = 1; | |
1101 | } | |
1102 | ||
1103 | channel = consumer_find_channel(key); | |
1104 | if (!channel) { | |
6a00837f | 1105 | ERR("UST snapshot channel not found for key %" PRIu64, key); |
10a50311 JD |
1106 | ret = -1; |
1107 | goto error; | |
1108 | } | |
1109 | assert(!channel->monitor); | |
6a00837f | 1110 | DBG("UST consumer snapshot channel %" PRIu64, key); |
10a50311 JD |
1111 | |
1112 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { | |
9ce5646a MD |
1113 | health_code_update(); |
1114 | ||
10a50311 JD |
1115 | /* Lock stream because we are about to change its state. */ |
1116 | pthread_mutex_lock(&stream->lock); | |
1117 | stream->net_seq_idx = relayd_id; | |
1118 | ||
1119 | if (use_relayd) { | |
1120 | ret = consumer_send_relayd_stream(stream, path); | |
1121 | if (ret < 0) { | |
1122 | goto error_unlock; | |
1123 | } | |
1124 | } else { | |
1125 | ret = utils_create_stream_file(path, stream->name, | |
1126 | stream->chan->tracefile_size, | |
1127 | stream->tracefile_count_current, | |
309167d2 | 1128 | stream->uid, stream->gid, NULL); |
10a50311 JD |
1129 | if (ret < 0) { |
1130 | goto error_unlock; | |
1131 | } | |
1132 | stream->out_fd = ret; | |
1133 | stream->tracefile_size_current = 0; | |
1134 | ||
1135 | DBG("UST consumer snapshot stream %s/%s (%" PRIu64 ")", path, | |
1136 | stream->name, stream->key); | |
1137 | } | |
1138 | ||
d4d80f77 MD |
1139 | /* |
1140 | * If tracing is active, we want to perform a "full" buffer flush. | |
1141 | * Else, if quiescent, it has already been done by the prior stop. | |
1142 | */ | |
1143 | if (!stream->quiescent) { | |
1144 | ustctl_flush_buffer(stream->ustream, 0); | |
1145 | } | |
10a50311 JD |
1146 | |
1147 | ret = lttng_ustconsumer_take_snapshot(stream); | |
1148 | if (ret < 0) { | |
1149 | ERR("Taking UST snapshot"); | |
1150 | goto error_unlock; | |
1151 | } | |
1152 | ||
1153 | ret = lttng_ustconsumer_get_produced_snapshot(stream, &produced_pos); | |
1154 | if (ret < 0) { | |
1155 | ERR("Produced UST snapshot position"); | |
1156 | goto error_unlock; | |
1157 | } | |
1158 | ||
1159 | ret = lttng_ustconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
1160 | if (ret < 0) { | |
1161 | ERR("Consumerd UST snapshot position"); | |
1162 | goto error_unlock; | |
1163 | } | |
1164 | ||
5c786ded JD |
1165 | /* |
1166 | * The original value is sent back if max stream size is larger than | |
d07ceecd | 1167 | * the possible size of the snapshot. Also, we assume that the session |
5c786ded JD |
1168 | * daemon should never send a maximum stream size that is lower than |
1169 | * subbuffer size. | |
1170 | */ | |
d07ceecd MD |
1171 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
1172 | produced_pos, nb_packets_per_stream, | |
1173 | stream->max_sb_size); | |
5c786ded | 1174 | |
10a50311 JD |
1175 | while (consumed_pos < produced_pos) { |
1176 | ssize_t read_len; | |
1177 | unsigned long len, padded_len; | |
1178 | ||
9ce5646a MD |
1179 | health_code_update(); |
1180 | ||
10a50311 JD |
1181 | DBG("UST consumer taking snapshot at pos %lu", consumed_pos); |
1182 | ||
1183 | ret = ustctl_get_subbuf(stream->ustream, &consumed_pos); | |
1184 | if (ret < 0) { | |
1185 | if (ret != -EAGAIN) { | |
1186 | PERROR("ustctl_get_subbuf snapshot"); | |
1187 | goto error_close_stream; | |
1188 | } | |
1189 | DBG("UST consumer get subbuf failed. Skipping it."); | |
1190 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 1191 | stream->chan->lost_packets++; |
10a50311 JD |
1192 | continue; |
1193 | } | |
1194 | ||
1195 | ret = ustctl_get_subbuf_size(stream->ustream, &len); | |
1196 | if (ret < 0) { | |
1197 | ERR("Snapshot ustctl_get_subbuf_size"); | |
1198 | goto error_put_subbuf; | |
1199 | } | |
1200 | ||
1201 | ret = ustctl_get_padded_subbuf_size(stream->ustream, &padded_len); | |
1202 | if (ret < 0) { | |
1203 | ERR("Snapshot ustctl_get_padded_subbuf_size"); | |
1204 | goto error_put_subbuf; | |
1205 | } | |
1206 | ||
1207 | read_len = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, len, | |
309167d2 | 1208 | padded_len - len, NULL); |
10a50311 JD |
1209 | if (use_relayd) { |
1210 | if (read_len != len) { | |
56591bac | 1211 | ret = -EPERM; |
10a50311 JD |
1212 | goto error_put_subbuf; |
1213 | } | |
1214 | } else { | |
1215 | if (read_len != padded_len) { | |
56591bac | 1216 | ret = -EPERM; |
10a50311 JD |
1217 | goto error_put_subbuf; |
1218 | } | |
1219 | } | |
1220 | ||
1221 | ret = ustctl_put_subbuf(stream->ustream); | |
1222 | if (ret < 0) { | |
1223 | ERR("Snapshot ustctl_put_subbuf"); | |
1224 | goto error_close_stream; | |
1225 | } | |
1226 | consumed_pos += stream->max_sb_size; | |
1227 | } | |
1228 | ||
1229 | /* Simply close the stream so we can use it on the next snapshot. */ | |
1230 | consumer_stream_close(stream); | |
1231 | pthread_mutex_unlock(&stream->lock); | |
1232 | } | |
1233 | ||
1234 | rcu_read_unlock(); | |
1235 | return 0; | |
1236 | ||
1237 | error_put_subbuf: | |
1238 | if (ustctl_put_subbuf(stream->ustream) < 0) { | |
1239 | ERR("Snapshot ustctl_put_subbuf"); | |
1240 | } | |
1241 | error_close_stream: | |
1242 | consumer_stream_close(stream); | |
1243 | error_unlock: | |
1244 | pthread_mutex_unlock(&stream->lock); | |
1245 | error: | |
1246 | rcu_read_unlock(); | |
d88aee68 DG |
1247 | return ret; |
1248 | } | |
1249 | ||
331744e3 | 1250 | /* |
c585821b MD |
1251 | * Receive the metadata updates from the sessiond. Supports receiving |
1252 | * overlapping metadata, but is needs to always belong to a contiguous | |
1253 | * range starting from 0. | |
1254 | * Be careful about the locks held when calling this function: it needs | |
1255 | * the metadata cache flush to concurrently progress in order to | |
1256 | * complete. | |
331744e3 JD |
1257 | */ |
1258 | int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset, | |
93ec662e JD |
1259 | uint64_t len, uint64_t version, |
1260 | struct lttng_consumer_channel *channel, int timer, int wait) | |
331744e3 | 1261 | { |
0c759fc9 | 1262 | int ret, ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
331744e3 JD |
1263 | char *metadata_str; |
1264 | ||
8fd623e0 | 1265 | DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, len); |
331744e3 JD |
1266 | |
1267 | metadata_str = zmalloc(len * sizeof(char)); | |
1268 | if (!metadata_str) { | |
1269 | PERROR("zmalloc metadata string"); | |
1270 | ret_code = LTTCOMM_CONSUMERD_ENOMEM; | |
1271 | goto end; | |
1272 | } | |
1273 | ||
9ce5646a MD |
1274 | health_code_update(); |
1275 | ||
331744e3 JD |
1276 | /* Receive metadata string. */ |
1277 | ret = lttcomm_recv_unix_sock(sock, metadata_str, len); | |
1278 | if (ret < 0) { | |
1279 | /* Session daemon is dead so return gracefully. */ | |
1280 | ret_code = ret; | |
1281 | goto end_free; | |
1282 | } | |
1283 | ||
9ce5646a MD |
1284 | health_code_update(); |
1285 | ||
331744e3 | 1286 | pthread_mutex_lock(&channel->metadata_cache->lock); |
93ec662e JD |
1287 | ret = consumer_metadata_cache_write(channel, offset, len, version, |
1288 | metadata_str); | |
331744e3 JD |
1289 | if (ret < 0) { |
1290 | /* Unable to handle metadata. Notify session daemon. */ | |
1291 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; | |
a32bd775 DG |
1292 | /* |
1293 | * Skip metadata flush on write error since the offset and len might | |
1294 | * not have been updated which could create an infinite loop below when | |
1295 | * waiting for the metadata cache to be flushed. | |
1296 | */ | |
1297 | pthread_mutex_unlock(&channel->metadata_cache->lock); | |
a32bd775 | 1298 | goto end_free; |
331744e3 JD |
1299 | } |
1300 | pthread_mutex_unlock(&channel->metadata_cache->lock); | |
1301 | ||
94d49140 JD |
1302 | if (!wait) { |
1303 | goto end_free; | |
1304 | } | |
5e41ebe1 | 1305 | while (consumer_metadata_cache_flushed(channel, offset + len, timer)) { |
331744e3 | 1306 | DBG("Waiting for metadata to be flushed"); |
9ce5646a MD |
1307 | |
1308 | health_code_update(); | |
1309 | ||
331744e3 JD |
1310 | usleep(DEFAULT_METADATA_AVAILABILITY_WAIT_TIME); |
1311 | } | |
1312 | ||
1313 | end_free: | |
1314 | free(metadata_str); | |
1315 | end: | |
1316 | return ret_code; | |
1317 | } | |
1318 | ||
4cbc1a04 DG |
1319 | /* |
1320 | * Receive command from session daemon and process it. | |
1321 | * | |
1322 | * Return 1 on success else a negative value or 0. | |
1323 | */ | |
3bd1e081 MD |
1324 | int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
1325 | int sock, struct pollfd *consumer_sockpoll) | |
1326 | { | |
1327 | ssize_t ret; | |
0c759fc9 | 1328 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 | 1329 | struct lttcomm_consumer_msg msg; |
ffe60014 | 1330 | struct lttng_consumer_channel *channel = NULL; |
3bd1e081 | 1331 | |
9ce5646a MD |
1332 | health_code_update(); |
1333 | ||
3bd1e081 MD |
1334 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
1335 | if (ret != sizeof(msg)) { | |
173af62f DG |
1336 | DBG("Consumer received unexpected message size %zd (expects %zu)", |
1337 | ret, sizeof(msg)); | |
3be74084 DG |
1338 | /* |
1339 | * The ret value might 0 meaning an orderly shutdown but this is ok | |
1340 | * since the caller handles this. | |
1341 | */ | |
489f70e9 | 1342 | if (ret > 0) { |
c6857fcf | 1343 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
489f70e9 MD |
1344 | ret = -1; |
1345 | } | |
3bd1e081 MD |
1346 | return ret; |
1347 | } | |
9ce5646a MD |
1348 | |
1349 | health_code_update(); | |
1350 | ||
84382d49 MD |
1351 | /* deprecated */ |
1352 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 1353 | |
9ce5646a MD |
1354 | health_code_update(); |
1355 | ||
3f8e211f | 1356 | /* relayd needs RCU read-side lock */ |
b0b335c8 MD |
1357 | rcu_read_lock(); |
1358 | ||
3bd1e081 | 1359 | switch (msg.cmd_type) { |
00e2e675 DG |
1360 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
1361 | { | |
f50f23d9 | 1362 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 1363 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 1364 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 JD |
1365 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
1366 | msg.u.relayd_sock.relayd_session_id); | |
00e2e675 DG |
1367 | goto end_nosignal; |
1368 | } | |
173af62f DG |
1369 | case LTTNG_CONSUMER_DESTROY_RELAYD: |
1370 | { | |
a6ba4fe1 | 1371 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
173af62f DG |
1372 | struct consumer_relayd_sock_pair *relayd; |
1373 | ||
a6ba4fe1 | 1374 | DBG("UST consumer destroying relayd %" PRIu64, index); |
173af62f DG |
1375 | |
1376 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 1377 | relayd = consumer_find_relayd(index); |
173af62f | 1378 | if (relayd == NULL) { |
3448e266 | 1379 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 1380 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
173af62f DG |
1381 | } |
1382 | ||
a6ba4fe1 DG |
1383 | /* |
1384 | * Each relayd socket pair has a refcount of stream attached to it | |
1385 | * which tells if the relayd is still active or not depending on the | |
1386 | * refcount value. | |
1387 | * | |
1388 | * This will set the destroy flag of the relayd object and destroy it | |
1389 | * if the refcount reaches zero when called. | |
1390 | * | |
1391 | * The destroy can happen either here or when a stream fd hangs up. | |
1392 | */ | |
f50f23d9 DG |
1393 | if (relayd) { |
1394 | consumer_flag_relayd_for_destroy(relayd); | |
1395 | } | |
1396 | ||
d88aee68 | 1397 | goto end_msg_sessiond; |
173af62f | 1398 | } |
3bd1e081 MD |
1399 | case LTTNG_CONSUMER_UPDATE_STREAM: |
1400 | { | |
3f8e211f | 1401 | rcu_read_unlock(); |
7ad0a0cb | 1402 | return -ENOSYS; |
3bd1e081 | 1403 | } |
6d805429 | 1404 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 1405 | { |
3be74084 | 1406 | int ret, is_data_pending; |
6d805429 | 1407 | uint64_t id = msg.u.data_pending.session_id; |
ca22feea | 1408 | |
6d805429 | 1409 | DBG("UST consumer data pending command for id %" PRIu64, id); |
ca22feea | 1410 | |
3be74084 | 1411 | is_data_pending = consumer_data_pending(id); |
ca22feea DG |
1412 | |
1413 | /* Send back returned value to session daemon */ | |
3be74084 DG |
1414 | ret = lttcomm_send_unix_sock(sock, &is_data_pending, |
1415 | sizeof(is_data_pending)); | |
ca22feea | 1416 | if (ret < 0) { |
3be74084 | 1417 | DBG("Error when sending the data pending ret code: %d", ret); |
489f70e9 | 1418 | goto error_fatal; |
ca22feea | 1419 | } |
f50f23d9 DG |
1420 | |
1421 | /* | |
1422 | * No need to send back a status message since the data pending | |
1423 | * returned value is the response. | |
1424 | */ | |
ca22feea | 1425 | break; |
53632229 | 1426 | } |
ffe60014 DG |
1427 | case LTTNG_CONSUMER_ASK_CHANNEL_CREATION: |
1428 | { | |
1429 | int ret; | |
1430 | struct ustctl_consumer_channel_attr attr; | |
1431 | ||
1432 | /* Create a plain object and reserve a channel key. */ | |
1433 | channel = allocate_channel(msg.u.ask_channel.session_id, | |
1434 | msg.u.ask_channel.pathname, msg.u.ask_channel.name, | |
1435 | msg.u.ask_channel.uid, msg.u.ask_channel.gid, | |
1436 | msg.u.ask_channel.relayd_id, msg.u.ask_channel.key, | |
1624d5b7 JD |
1437 | (enum lttng_event_output) msg.u.ask_channel.output, |
1438 | msg.u.ask_channel.tracefile_size, | |
2bba9e53 | 1439 | msg.u.ask_channel.tracefile_count, |
1950109e | 1440 | msg.u.ask_channel.session_id_per_pid, |
ecc48a90 | 1441 | msg.u.ask_channel.monitor, |
d7ba1388 | 1442 | msg.u.ask_channel.live_timer_interval, |
3d071855 | 1443 | msg.u.ask_channel.root_shm_path, |
d7ba1388 | 1444 | msg.u.ask_channel.shm_path); |
ffe60014 DG |
1445 | if (!channel) { |
1446 | goto end_channel_error; | |
1447 | } | |
1448 | ||
567eb353 DG |
1449 | /* |
1450 | * Assign UST application UID to the channel. This value is ignored for | |
1451 | * per PID buffers. This is specific to UST thus setting this after the | |
1452 | * allocation. | |
1453 | */ | |
1454 | channel->ust_app_uid = msg.u.ask_channel.ust_app_uid; | |
1455 | ||
ffe60014 DG |
1456 | /* Build channel attributes from received message. */ |
1457 | attr.subbuf_size = msg.u.ask_channel.subbuf_size; | |
1458 | attr.num_subbuf = msg.u.ask_channel.num_subbuf; | |
1459 | attr.overwrite = msg.u.ask_channel.overwrite; | |
1460 | attr.switch_timer_interval = msg.u.ask_channel.switch_timer_interval; | |
1461 | attr.read_timer_interval = msg.u.ask_channel.read_timer_interval; | |
7972aab2 | 1462 | attr.chan_id = msg.u.ask_channel.chan_id; |
ffe60014 | 1463 | memcpy(attr.uuid, msg.u.ask_channel.uuid, sizeof(attr.uuid)); |
491d1539 | 1464 | attr.blocking_timeout= msg.u.ask_channel.blocking_timeout; |
ffe60014 | 1465 | |
0c759fc9 DG |
1466 | /* Match channel buffer type to the UST abi. */ |
1467 | switch (msg.u.ask_channel.output) { | |
1468 | case LTTNG_EVENT_MMAP: | |
1469 | default: | |
1470 | attr.output = LTTNG_UST_MMAP; | |
1471 | break; | |
1472 | } | |
1473 | ||
ffe60014 DG |
1474 | /* Translate and save channel type. */ |
1475 | switch (msg.u.ask_channel.type) { | |
1476 | case LTTNG_UST_CHAN_PER_CPU: | |
1477 | channel->type = CONSUMER_CHANNEL_TYPE_DATA; | |
1478 | attr.type = LTTNG_UST_CHAN_PER_CPU; | |
8633d6e3 MD |
1479 | /* |
1480 | * Set refcount to 1 for owner. Below, we will | |
1481 | * pass ownership to the | |
1482 | * consumer_thread_channel_poll() thread. | |
1483 | */ | |
1484 | channel->refcount = 1; | |
ffe60014 DG |
1485 | break; |
1486 | case LTTNG_UST_CHAN_METADATA: | |
1487 | channel->type = CONSUMER_CHANNEL_TYPE_METADATA; | |
1488 | attr.type = LTTNG_UST_CHAN_METADATA; | |
1489 | break; | |
1490 | default: | |
1491 | assert(0); | |
1492 | goto error_fatal; | |
1493 | }; | |
1494 | ||
9ce5646a MD |
1495 | health_code_update(); |
1496 | ||
ffe60014 DG |
1497 | ret = ask_channel(ctx, sock, channel, &attr); |
1498 | if (ret < 0) { | |
1499 | goto end_channel_error; | |
1500 | } | |
1501 | ||
fc643247 MD |
1502 | if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) { |
1503 | ret = consumer_metadata_cache_allocate(channel); | |
1504 | if (ret < 0) { | |
1505 | ERR("Allocating metadata cache"); | |
1506 | goto end_channel_error; | |
1507 | } | |
1508 | consumer_timer_switch_start(channel, attr.switch_timer_interval); | |
1509 | attr.switch_timer_interval = 0; | |
94d49140 | 1510 | } else { |
e9404c27 JG |
1511 | int monitor_start_ret; |
1512 | ||
94d49140 JD |
1513 | consumer_timer_live_start(channel, |
1514 | msg.u.ask_channel.live_timer_interval); | |
e9404c27 JG |
1515 | monitor_start_ret = consumer_timer_monitor_start( |
1516 | channel, | |
1517 | msg.u.ask_channel.monitor_timer_interval); | |
1518 | if (monitor_start_ret < 0) { | |
1519 | ERR("Starting channel monitoring timer failed"); | |
1520 | goto end_channel_error; | |
1521 | } | |
fc643247 MD |
1522 | } |
1523 | ||
9ce5646a MD |
1524 | health_code_update(); |
1525 | ||
ffe60014 DG |
1526 | /* |
1527 | * Add the channel to the internal state AFTER all streams were created | |
1528 | * and successfully sent to session daemon. This way, all streams must | |
1529 | * be ready before this channel is visible to the threads. | |
fc643247 MD |
1530 | * If add_channel succeeds, ownership of the channel is |
1531 | * passed to consumer_thread_channel_poll(). | |
ffe60014 DG |
1532 | */ |
1533 | ret = add_channel(channel, ctx); | |
1534 | if (ret < 0) { | |
ea88ca2a MD |
1535 | if (msg.u.ask_channel.type == LTTNG_UST_CHAN_METADATA) { |
1536 | if (channel->switch_timer_enabled == 1) { | |
1537 | consumer_timer_switch_stop(channel); | |
1538 | } | |
1539 | consumer_metadata_cache_destroy(channel); | |
1540 | } | |
d3e2ba59 JD |
1541 | if (channel->live_timer_enabled == 1) { |
1542 | consumer_timer_live_stop(channel); | |
1543 | } | |
e9404c27 JG |
1544 | if (channel->monitor_timer_enabled == 1) { |
1545 | consumer_timer_monitor_stop(channel); | |
1546 | } | |
ffe60014 DG |
1547 | goto end_channel_error; |
1548 | } | |
1549 | ||
9ce5646a MD |
1550 | health_code_update(); |
1551 | ||
ffe60014 DG |
1552 | /* |
1553 | * Channel and streams are now created. Inform the session daemon that | |
1554 | * everything went well and should wait to receive the channel and | |
1555 | * streams with ustctl API. | |
1556 | */ | |
1557 | ret = consumer_send_status_channel(sock, channel); | |
1558 | if (ret < 0) { | |
1559 | /* | |
489f70e9 | 1560 | * There is probably a problem on the socket. |
ffe60014 | 1561 | */ |
489f70e9 | 1562 | goto error_fatal; |
ffe60014 DG |
1563 | } |
1564 | ||
1565 | break; | |
1566 | } | |
1567 | case LTTNG_CONSUMER_GET_CHANNEL: | |
1568 | { | |
1569 | int ret, relayd_err = 0; | |
d88aee68 | 1570 | uint64_t key = msg.u.get_channel.key; |
ffe60014 | 1571 | struct lttng_consumer_channel *channel; |
ffe60014 DG |
1572 | |
1573 | channel = consumer_find_channel(key); | |
1574 | if (!channel) { | |
8fd623e0 | 1575 | ERR("UST consumer get channel key %" PRIu64 " not found", key); |
e462382a | 1576 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
1577 | goto end_msg_sessiond; |
1578 | } | |
1579 | ||
9ce5646a MD |
1580 | health_code_update(); |
1581 | ||
a3a86f35 JG |
1582 | /* Send the channel to sessiond (and relayd, if applicable). */ |
1583 | ret = send_channel_to_sessiond_and_relayd(sock, channel, ctx, | |
1584 | &relayd_err); | |
ffe60014 DG |
1585 | if (ret < 0) { |
1586 | if (relayd_err) { | |
1587 | /* | |
1588 | * We were unable to send to the relayd the stream so avoid | |
1589 | * sending back a fatal error to the thread since this is OK | |
f2a444f1 DG |
1590 | * and the consumer can continue its work. The above call |
1591 | * has sent the error status message to the sessiond. | |
ffe60014 | 1592 | */ |
f2a444f1 | 1593 | goto end_nosignal; |
ffe60014 DG |
1594 | } |
1595 | /* | |
1596 | * The communicaton was broken hence there is a bad state between | |
1597 | * the consumer and sessiond so stop everything. | |
1598 | */ | |
1599 | goto error_fatal; | |
1600 | } | |
1601 | ||
9ce5646a MD |
1602 | health_code_update(); |
1603 | ||
10a50311 JD |
1604 | /* |
1605 | * In no monitor mode, the streams ownership is kept inside the channel | |
1606 | * so don't send them to the data thread. | |
1607 | */ | |
1608 | if (!channel->monitor) { | |
1609 | goto end_msg_sessiond; | |
1610 | } | |
1611 | ||
d88aee68 DG |
1612 | ret = send_streams_to_thread(channel, ctx); |
1613 | if (ret < 0) { | |
1614 | /* | |
1615 | * If we are unable to send the stream to the thread, there is | |
1616 | * a big problem so just stop everything. | |
1617 | */ | |
1618 | goto error_fatal; | |
ffe60014 | 1619 | } |
ffe60014 DG |
1620 | /* List MUST be empty after or else it could be reused. */ |
1621 | assert(cds_list_empty(&channel->streams.head)); | |
d88aee68 DG |
1622 | goto end_msg_sessiond; |
1623 | } | |
1624 | case LTTNG_CONSUMER_DESTROY_CHANNEL: | |
1625 | { | |
1626 | uint64_t key = msg.u.destroy_channel.key; | |
d88aee68 | 1627 | |
a0cbdd2e MD |
1628 | /* |
1629 | * Only called if streams have not been sent to stream | |
1630 | * manager thread. However, channel has been sent to | |
1631 | * channel manager thread. | |
1632 | */ | |
1633 | notify_thread_del_channel(ctx, key); | |
d88aee68 | 1634 | goto end_msg_sessiond; |
ffe60014 | 1635 | } |
d88aee68 DG |
1636 | case LTTNG_CONSUMER_CLOSE_METADATA: |
1637 | { | |
1638 | int ret; | |
1639 | ||
1640 | ret = close_metadata(msg.u.close_metadata.key); | |
1641 | if (ret != 0) { | |
1642 | ret_code = ret; | |
1643 | } | |
1644 | ||
1645 | goto end_msg_sessiond; | |
1646 | } | |
7972aab2 DG |
1647 | case LTTNG_CONSUMER_FLUSH_CHANNEL: |
1648 | { | |
1649 | int ret; | |
1650 | ||
1651 | ret = flush_channel(msg.u.flush_channel.key); | |
1652 | if (ret != 0) { | |
1653 | ret_code = ret; | |
1654 | } | |
1655 | ||
1656 | goto end_msg_sessiond; | |
1657 | } | |
0dd01979 MD |
1658 | case LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL: |
1659 | { | |
1660 | int ret; | |
1661 | ||
1662 | ret = clear_quiescent_channel( | |
1663 | msg.u.clear_quiescent_channel.key); | |
1664 | if (ret != 0) { | |
1665 | ret_code = ret; | |
1666 | } | |
1667 | ||
1668 | goto end_msg_sessiond; | |
1669 | } | |
d88aee68 | 1670 | case LTTNG_CONSUMER_PUSH_METADATA: |
ffe60014 DG |
1671 | { |
1672 | int ret; | |
d88aee68 | 1673 | uint64_t len = msg.u.push_metadata.len; |
d88aee68 | 1674 | uint64_t key = msg.u.push_metadata.key; |
331744e3 | 1675 | uint64_t offset = msg.u.push_metadata.target_offset; |
93ec662e | 1676 | uint64_t version = msg.u.push_metadata.version; |
ffe60014 DG |
1677 | struct lttng_consumer_channel *channel; |
1678 | ||
8fd623e0 DG |
1679 | DBG("UST consumer push metadata key %" PRIu64 " of len %" PRIu64, key, |
1680 | len); | |
ffe60014 DG |
1681 | |
1682 | channel = consumer_find_channel(key); | |
1683 | if (!channel) { | |
000baf6a DG |
1684 | /* |
1685 | * This is possible if the metadata creation on the consumer side | |
1686 | * is in flight vis-a-vis a concurrent push metadata from the | |
1687 | * session daemon. Simply return that the channel failed and the | |
1688 | * session daemon will handle that message correctly considering | |
1689 | * that this race is acceptable thus the DBG() statement here. | |
1690 | */ | |
1691 | DBG("UST consumer push metadata %" PRIu64 " not found", key); | |
1692 | ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; | |
4a2eb0ca | 1693 | goto end_msg_sessiond; |
d88aee68 DG |
1694 | } |
1695 | ||
9ce5646a MD |
1696 | health_code_update(); |
1697 | ||
c585821b MD |
1698 | if (!len) { |
1699 | /* | |
1700 | * There is nothing to receive. We have simply | |
1701 | * checked whether the channel can be found. | |
1702 | */ | |
1703 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1704 | goto end_msg_sessiond; | |
1705 | } | |
1706 | ||
d88aee68 | 1707 | /* Tell session daemon we are ready to receive the metadata. */ |
0c759fc9 | 1708 | ret = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
ffe60014 DG |
1709 | if (ret < 0) { |
1710 | /* Somehow, the session daemon is not responding anymore. */ | |
d88aee68 DG |
1711 | goto error_fatal; |
1712 | } | |
1713 | ||
9ce5646a MD |
1714 | health_code_update(); |
1715 | ||
d88aee68 | 1716 | /* Wait for more data. */ |
9ce5646a MD |
1717 | health_poll_entry(); |
1718 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
1719 | health_poll_exit(); | |
84382d49 | 1720 | if (ret) { |
489f70e9 | 1721 | goto error_fatal; |
d88aee68 DG |
1722 | } |
1723 | ||
9ce5646a MD |
1724 | health_code_update(); |
1725 | ||
331744e3 | 1726 | ret = lttng_ustconsumer_recv_metadata(sock, key, offset, |
93ec662e | 1727 | len, version, channel, 0, 1); |
d88aee68 | 1728 | if (ret < 0) { |
331744e3 | 1729 | /* error receiving from sessiond */ |
489f70e9 | 1730 | goto error_fatal; |
331744e3 JD |
1731 | } else { |
1732 | ret_code = ret; | |
d88aee68 DG |
1733 | goto end_msg_sessiond; |
1734 | } | |
d88aee68 DG |
1735 | } |
1736 | case LTTNG_CONSUMER_SETUP_METADATA: | |
1737 | { | |
1738 | int ret; | |
1739 | ||
1740 | ret = setup_metadata(ctx, msg.u.setup_metadata.key); | |
1741 | if (ret) { | |
1742 | ret_code = ret; | |
1743 | } | |
1744 | goto end_msg_sessiond; | |
ffe60014 | 1745 | } |
6dc3064a DG |
1746 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
1747 | { | |
10a50311 JD |
1748 | if (msg.u.snapshot_channel.metadata) { |
1749 | ret = snapshot_metadata(msg.u.snapshot_channel.key, | |
1750 | msg.u.snapshot_channel.pathname, | |
1751 | msg.u.snapshot_channel.relayd_id, | |
1752 | ctx); | |
1753 | if (ret < 0) { | |
1754 | ERR("Snapshot metadata failed"); | |
e462382a | 1755 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; |
10a50311 JD |
1756 | } |
1757 | } else { | |
1758 | ret = snapshot_channel(msg.u.snapshot_channel.key, | |
1759 | msg.u.snapshot_channel.pathname, | |
1760 | msg.u.snapshot_channel.relayd_id, | |
d07ceecd | 1761 | msg.u.snapshot_channel.nb_packets_per_stream, |
10a50311 JD |
1762 | ctx); |
1763 | if (ret < 0) { | |
1764 | ERR("Snapshot channel failed"); | |
e462382a | 1765 | ret_code = LTTCOMM_CONSUMERD_CHANNEL_FAIL; |
10a50311 JD |
1766 | } |
1767 | } | |
1768 | ||
9ce5646a | 1769 | health_code_update(); |
6dc3064a DG |
1770 | ret = consumer_send_status_msg(sock, ret_code); |
1771 | if (ret < 0) { | |
1772 | /* Somehow, the session daemon is not responding anymore. */ | |
1773 | goto end_nosignal; | |
1774 | } | |
9ce5646a | 1775 | health_code_update(); |
6dc3064a DG |
1776 | break; |
1777 | } | |
fb83fe64 JD |
1778 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1779 | { | |
beb59458 MJ |
1780 | int ret = 0; |
1781 | uint64_t discarded_events; | |
fb83fe64 JD |
1782 | struct lttng_ht_iter iter; |
1783 | struct lttng_ht *ht; | |
1784 | struct lttng_consumer_stream *stream; | |
1785 | uint64_t id = msg.u.discarded_events.session_id; | |
1786 | uint64_t key = msg.u.discarded_events.channel_key; | |
1787 | ||
1788 | DBG("UST consumer discarded events command for session id %" | |
1789 | PRIu64, id); | |
1790 | rcu_read_lock(); | |
1791 | pthread_mutex_lock(&consumer_data.lock); | |
1792 | ||
1793 | ht = consumer_data.stream_list_ht; | |
1794 | ||
1795 | /* | |
1796 | * We only need a reference to the channel, but they are not | |
1797 | * directly indexed, so we just use the first matching stream | |
1798 | * to extract the information we need, we default to 0 if not | |
1799 | * found (no events are dropped if the channel is not yet in | |
1800 | * use). | |
1801 | */ | |
beb59458 | 1802 | discarded_events = 0; |
fb83fe64 JD |
1803 | cds_lfht_for_each_entry_duplicate(ht->ht, |
1804 | ht->hash_fct(&id, lttng_ht_seed), | |
1805 | ht->match_fct, &id, | |
1806 | &iter.iter, stream, node_session_id.node) { | |
1807 | if (stream->chan->key == key) { | |
beb59458 | 1808 | discarded_events = stream->chan->discarded_events; |
fb83fe64 JD |
1809 | break; |
1810 | } | |
1811 | } | |
1812 | pthread_mutex_unlock(&consumer_data.lock); | |
1813 | rcu_read_unlock(); | |
1814 | ||
1815 | DBG("UST consumer discarded events command for session id %" | |
1816 | PRIu64 ", channel key %" PRIu64, id, key); | |
1817 | ||
1818 | health_code_update(); | |
1819 | ||
1820 | /* Send back returned value to session daemon */ | |
beb59458 | 1821 | ret = lttcomm_send_unix_sock(sock, &discarded_events, sizeof(discarded_events)); |
fb83fe64 JD |
1822 | if (ret < 0) { |
1823 | PERROR("send discarded events"); | |
1824 | goto error_fatal; | |
1825 | } | |
1826 | ||
1827 | break; | |
1828 | } | |
1829 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1830 | { | |
9a06e8d4 JG |
1831 | int ret; |
1832 | uint64_t lost_packets; | |
fb83fe64 JD |
1833 | struct lttng_ht_iter iter; |
1834 | struct lttng_ht *ht; | |
1835 | struct lttng_consumer_stream *stream; | |
1836 | uint64_t id = msg.u.lost_packets.session_id; | |
1837 | uint64_t key = msg.u.lost_packets.channel_key; | |
1838 | ||
1839 | DBG("UST consumer lost packets command for session id %" | |
1840 | PRIu64, id); | |
1841 | rcu_read_lock(); | |
1842 | pthread_mutex_lock(&consumer_data.lock); | |
1843 | ||
1844 | ht = consumer_data.stream_list_ht; | |
1845 | ||
1846 | /* | |
1847 | * We only need a reference to the channel, but they are not | |
1848 | * directly indexed, so we just use the first matching stream | |
1849 | * to extract the information we need, we default to 0 if not | |
1850 | * found (no packets lost if the channel is not yet in use). | |
1851 | */ | |
9a06e8d4 | 1852 | lost_packets = 0; |
fb83fe64 JD |
1853 | cds_lfht_for_each_entry_duplicate(ht->ht, |
1854 | ht->hash_fct(&id, lttng_ht_seed), | |
1855 | ht->match_fct, &id, | |
1856 | &iter.iter, stream, node_session_id.node) { | |
1857 | if (stream->chan->key == key) { | |
9a06e8d4 | 1858 | lost_packets = stream->chan->lost_packets; |
fb83fe64 JD |
1859 | break; |
1860 | } | |
1861 | } | |
1862 | pthread_mutex_unlock(&consumer_data.lock); | |
1863 | rcu_read_unlock(); | |
1864 | ||
1865 | DBG("UST consumer lost packets command for session id %" | |
1866 | PRIu64 ", channel key %" PRIu64, id, key); | |
1867 | ||
1868 | health_code_update(); | |
1869 | ||
1870 | /* Send back returned value to session daemon */ | |
9a06e8d4 JG |
1871 | ret = lttcomm_send_unix_sock(sock, &lost_packets, |
1872 | sizeof(lost_packets)); | |
fb83fe64 JD |
1873 | if (ret < 0) { |
1874 | PERROR("send lost packets"); | |
1875 | goto error_fatal; | |
1876 | } | |
1877 | ||
1878 | break; | |
1879 | } | |
b3530820 JG |
1880 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1881 | { | |
1882 | int channel_monitor_pipe; | |
1883 | ||
1884 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1885 | /* Successfully received the command's type. */ | |
1886 | ret = consumer_send_status_msg(sock, ret_code); | |
1887 | if (ret < 0) { | |
1888 | goto error_fatal; | |
1889 | } | |
1890 | ||
1891 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, | |
1892 | 1); | |
1893 | if (ret != sizeof(channel_monitor_pipe)) { | |
1894 | ERR("Failed to receive channel monitor pipe"); | |
1895 | goto error_fatal; | |
1896 | } | |
1897 | ||
1898 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
1899 | ret = consumer_timer_thread_set_channel_monitor_pipe( | |
1900 | channel_monitor_pipe); | |
1901 | if (!ret) { | |
1902 | int flags; | |
1903 | ||
1904 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1905 | /* Set the pipe as non-blocking. */ | |
1906 | ret = fcntl(channel_monitor_pipe, F_GETFL, 0); | |
1907 | if (ret == -1) { | |
1908 | PERROR("fcntl get flags of the channel monitoring pipe"); | |
1909 | goto error_fatal; | |
1910 | } | |
1911 | flags = ret; | |
1912 | ||
1913 | ret = fcntl(channel_monitor_pipe, F_SETFL, | |
1914 | flags | O_NONBLOCK); | |
1915 | if (ret == -1) { | |
1916 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); | |
1917 | goto error_fatal; | |
1918 | } | |
1919 | DBG("Channel monitor pipe set as non-blocking"); | |
1920 | } else { | |
1921 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1922 | } | |
1923 | goto end_msg_sessiond; | |
1924 | } | |
62c43103 JD |
1925 | case LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE: |
1926 | { | |
1927 | int channel_rotate_pipe; | |
1928 | int flags; | |
1929 | ||
1930 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1931 | /* Successfully received the command's type. */ | |
1932 | ret = consumer_send_status_msg(sock, ret_code); | |
1933 | if (ret < 0) { | |
1934 | goto error_fatal; | |
1935 | } | |
1936 | ||
1937 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_rotate_pipe, 1); | |
1938 | if (ret != sizeof(channel_rotate_pipe)) { | |
1939 | ERR("Failed to receive channel rotate pipe"); | |
1940 | goto error_fatal; | |
1941 | } | |
1942 | ||
1943 | DBG("Received channel rotate pipe (%d)", channel_rotate_pipe); | |
1944 | ctx->channel_rotate_pipe = channel_rotate_pipe; | |
1945 | /* Set the pipe as non-blocking. */ | |
1946 | ret = fcntl(channel_rotate_pipe, F_GETFL, 0); | |
1947 | if (ret == -1) { | |
1948 | PERROR("fcntl get flags of the channel rotate pipe"); | |
1949 | goto error_fatal; | |
1950 | } | |
1951 | flags = ret; | |
1952 | ||
1953 | ret = fcntl(channel_rotate_pipe, F_SETFL, flags | O_NONBLOCK); | |
1954 | if (ret == -1) { | |
1955 | PERROR("fcntl set O_NONBLOCK flag of the channel rotate pipe"); | |
1956 | goto error_fatal; | |
1957 | } | |
1958 | DBG("Channel rotate pipe set as non-blocking"); | |
1959 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1960 | ret = consumer_send_status_msg(sock, ret_code); | |
1961 | if (ret < 0) { | |
1962 | goto error_fatal; | |
1963 | } | |
1964 | break; | |
1965 | } | |
b99a8d42 JD |
1966 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1967 | { | |
1968 | /* | |
1969 | * Sample the rotate position of all the streams in this channel. | |
1970 | */ | |
1971 | ret = lttng_consumer_rotate_channel(msg.u.rotate_channel.key, | |
1972 | msg.u.rotate_channel.pathname, | |
1973 | msg.u.rotate_channel.relayd_id, | |
1974 | msg.u.rotate_channel.metadata, | |
1975 | msg.u.rotate_channel.new_chunk_id, | |
1976 | ctx); | |
1977 | if (ret < 0) { | |
1978 | ERR("Rotate channel failed"); | |
1979 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1980 | } | |
1981 | ||
1982 | health_code_update(); | |
1983 | ||
1984 | ret = consumer_send_status_msg(sock, ret_code); | |
1985 | if (ret < 0) { | |
1986 | /* Somehow, the session daemon is not responding anymore. */ | |
1987 | goto end_nosignal; | |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | * Rotate the streams that are ready right now. | |
1992 | * FIXME: this is a second consecutive iteration over the | |
1993 | * streams in a channel, there is probably a better way to | |
1994 | * handle this, but it needs to be after the | |
1995 | * consumer_send_status_msg() call. | |
1996 | */ | |
1997 | ret = lttng_consumer_rotate_ready_streams( | |
1998 | msg.u.rotate_channel.key, ctx); | |
1999 | if (ret < 0) { | |
2000 | ERR("Rotate channel failed"); | |
2001 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
2002 | } | |
2003 | break; | |
2004 | } | |
00fb02ac JD |
2005 | case LTTNG_CONSUMER_ROTATE_RENAME: |
2006 | { | |
2007 | DBG("Consumer rename session %" PRIu64 " after rotation", | |
2008 | msg.u.rotate_rename.session_id); | |
2009 | ret = lttng_consumer_rotate_rename(msg.u.rotate_rename.old_path, | |
2010 | msg.u.rotate_rename.new_path, | |
2011 | msg.u.rotate_rename.uid, | |
2012 | msg.u.rotate_rename.gid, | |
2013 | msg.u.rotate_rename.relayd_id); | |
2014 | if (ret < 0) { | |
2015 | ERR("Rotate rename failed"); | |
d88744a4 JD |
2016 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
2017 | } | |
2018 | ||
2019 | health_code_update(); | |
2020 | ||
2021 | ret = consumer_send_status_msg(sock, ret_code); | |
2022 | if (ret < 0) { | |
2023 | /* Somehow, the session daemon is not responding anymore. */ | |
2024 | goto end_nosignal; | |
2025 | } | |
2026 | break; | |
2027 | } | |
2028 | case LTTNG_CONSUMER_ROTATE_PENDING_RELAY: | |
2029 | { | |
2030 | uint32_t pending; | |
2031 | ||
2032 | DBG("Consumer rotate pending on relay for session %" PRIu64, | |
2033 | msg.u.rotate_pending_relay.session_id); | |
2034 | pending = lttng_consumer_rotate_pending_relay( | |
2035 | msg.u.rotate_pending_relay.session_id, | |
2036 | msg.u.rotate_pending_relay.relayd_id, | |
2037 | msg.u.rotate_pending_relay.chunk_id); | |
2038 | if (pending < 0) { | |
2039 | ERR("Rotate pending relay failed"); | |
2040 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; | |
00fb02ac JD |
2041 | } |
2042 | ||
2043 | health_code_update(); | |
2044 | ||
2045 | ret = consumer_send_status_msg(sock, ret_code); | |
2046 | if (ret < 0) { | |
2047 | /* Somehow, the session daemon is not responding anymore. */ | |
2048 | goto end_nosignal; | |
2049 | } | |
d88744a4 JD |
2050 | |
2051 | /* Send back returned value to session daemon */ | |
2052 | ret = lttcomm_send_unix_sock(sock, &pending, sizeof(pending)); | |
2053 | if (ret < 0) { | |
2054 | PERROR("send data pending ret code"); | |
2055 | goto error_fatal; | |
2056 | } | |
00fb02ac JD |
2057 | break; |
2058 | } | |
a1ae2ea5 JD |
2059 | case LTTNG_CONSUMER_MKDIR: |
2060 | { | |
2061 | DBG("Consumer mkdir %s in session %" PRIu64, | |
2062 | msg.u.mkdir.path, | |
2063 | msg.u.mkdir.session_id); | |
2064 | ret = lttng_consumer_mkdir(msg.u.mkdir.path, | |
2065 | msg.u.mkdir.uid, | |
2066 | msg.u.mkdir.gid, | |
2067 | msg.u.mkdir.relayd_id); | |
2068 | if (ret < 0) { | |
2069 | ERR("consumer mkdir failed"); | |
d88744a4 | 2070 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
a1ae2ea5 JD |
2071 | } |
2072 | ||
2073 | health_code_update(); | |
2074 | ||
2075 | ret = consumer_send_status_msg(sock, ret_code); | |
2076 | if (ret < 0) { | |
2077 | /* Somehow, the session daemon is not responding anymore. */ | |
2078 | goto end_nosignal; | |
2079 | } | |
2080 | break; | |
2081 | } | |
3bd1e081 MD |
2082 | default: |
2083 | break; | |
2084 | } | |
3f8e211f | 2085 | |
3bd1e081 | 2086 | end_nosignal: |
b0b335c8 | 2087 | rcu_read_unlock(); |
4cbc1a04 | 2088 | |
9ce5646a MD |
2089 | health_code_update(); |
2090 | ||
4cbc1a04 DG |
2091 | /* |
2092 | * Return 1 to indicate success since the 0 value can be a socket | |
2093 | * shutdown during the recv() or send() call. | |
2094 | */ | |
2095 | return 1; | |
ffe60014 DG |
2096 | |
2097 | end_msg_sessiond: | |
2098 | /* | |
2099 | * The returned value here is not useful since either way we'll return 1 to | |
2100 | * the caller because the session daemon socket management is done | |
2101 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
2102 | */ | |
489f70e9 MD |
2103 | ret = consumer_send_status_msg(sock, ret_code); |
2104 | if (ret < 0) { | |
2105 | goto error_fatal; | |
2106 | } | |
ffe60014 | 2107 | rcu_read_unlock(); |
9ce5646a MD |
2108 | |
2109 | health_code_update(); | |
2110 | ||
ffe60014 DG |
2111 | return 1; |
2112 | end_channel_error: | |
2113 | if (channel) { | |
2114 | /* | |
2115 | * Free channel here since no one has a reference to it. We don't | |
2116 | * free after that because a stream can store this pointer. | |
2117 | */ | |
2118 | destroy_channel(channel); | |
2119 | } | |
2120 | /* We have to send a status channel message indicating an error. */ | |
2121 | ret = consumer_send_status_channel(sock, NULL); | |
2122 | if (ret < 0) { | |
2123 | /* Stop everything if session daemon can not be notified. */ | |
2124 | goto error_fatal; | |
2125 | } | |
2126 | rcu_read_unlock(); | |
9ce5646a MD |
2127 | |
2128 | health_code_update(); | |
2129 | ||
ffe60014 DG |
2130 | return 1; |
2131 | error_fatal: | |
2132 | rcu_read_unlock(); | |
2133 | /* This will issue a consumer stop. */ | |
2134 | return -1; | |
3bd1e081 MD |
2135 | } |
2136 | ||
ffe60014 DG |
2137 | /* |
2138 | * Wrapper over the mmap() read offset from ust-ctl library. Since this can be | |
2139 | * compiled out, we isolate it in this library. | |
2140 | */ | |
2141 | int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream, | |
2142 | unsigned long *off) | |
3bd1e081 | 2143 | { |
ffe60014 DG |
2144 | assert(stream); |
2145 | assert(stream->ustream); | |
b5c5fc29 | 2146 | |
ffe60014 | 2147 | return ustctl_get_mmap_read_offset(stream->ustream, off); |
3bd1e081 MD |
2148 | } |
2149 | ||
ffe60014 DG |
2150 | /* |
2151 | * Wrapper over the mmap() read offset from ust-ctl library. Since this can be | |
2152 | * compiled out, we isolate it in this library. | |
2153 | */ | |
2154 | void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream) | |
d056b477 | 2155 | { |
ffe60014 DG |
2156 | assert(stream); |
2157 | assert(stream->ustream); | |
2158 | ||
2159 | return ustctl_get_mmap_base(stream->ustream); | |
d056b477 MD |
2160 | } |
2161 | ||
fc6d7a51 JD |
2162 | void lttng_ustctl_flush_buffer(struct lttng_consumer_stream *stream, |
2163 | int producer_active) | |
2164 | { | |
2165 | assert(stream); | |
2166 | assert(stream->ustream); | |
2167 | ||
2168 | ustctl_flush_buffer(stream->ustream, producer_active); | |
2169 | } | |
2170 | ||
ffe60014 | 2171 | /* |
e9404c27 | 2172 | * Take a snapshot for a specific stream. |
ffe60014 DG |
2173 | * |
2174 | * Returns 0 on success, < 0 on error | |
2175 | */ | |
2176 | int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream) | |
3bd1e081 | 2177 | { |
ffe60014 DG |
2178 | assert(stream); |
2179 | assert(stream->ustream); | |
2180 | ||
2181 | return ustctl_snapshot(stream->ustream); | |
3bd1e081 MD |
2182 | } |
2183 | ||
e9404c27 JG |
2184 | /* |
2185 | * Sample consumed and produced positions for a specific stream. | |
2186 | * | |
2187 | * Returns 0 on success, < 0 on error. | |
2188 | */ | |
2189 | int lttng_ustconsumer_sample_snapshot_positions( | |
2190 | struct lttng_consumer_stream *stream) | |
2191 | { | |
2192 | assert(stream); | |
2193 | assert(stream->ustream); | |
2194 | ||
2195 | return ustctl_snapshot_sample_positions(stream->ustream); | |
2196 | } | |
2197 | ||
ffe60014 DG |
2198 | /* |
2199 | * Get the produced position | |
2200 | * | |
2201 | * Returns 0 on success, < 0 on error | |
2202 | */ | |
2203 | int lttng_ustconsumer_get_produced_snapshot( | |
2204 | struct lttng_consumer_stream *stream, unsigned long *pos) | |
3bd1e081 | 2205 | { |
ffe60014 DG |
2206 | assert(stream); |
2207 | assert(stream->ustream); | |
2208 | assert(pos); | |
7a57cf92 | 2209 | |
ffe60014 DG |
2210 | return ustctl_snapshot_get_produced(stream->ustream, pos); |
2211 | } | |
7a57cf92 | 2212 | |
10a50311 JD |
2213 | /* |
2214 | * Get the consumed position | |
2215 | * | |
2216 | * Returns 0 on success, < 0 on error | |
2217 | */ | |
2218 | int lttng_ustconsumer_get_consumed_snapshot( | |
2219 | struct lttng_consumer_stream *stream, unsigned long *pos) | |
2220 | { | |
2221 | assert(stream); | |
2222 | assert(stream->ustream); | |
2223 | assert(pos); | |
2224 | ||
2225 | return ustctl_snapshot_get_consumed(stream->ustream, pos); | |
2226 | } | |
2227 | ||
84a182ce DG |
2228 | void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream, |
2229 | int producer) | |
2230 | { | |
2231 | assert(stream); | |
2232 | assert(stream->ustream); | |
2233 | ||
2234 | ustctl_flush_buffer(stream->ustream, producer); | |
2235 | } | |
2236 | ||
2237 | int lttng_ustconsumer_get_current_timestamp( | |
2238 | struct lttng_consumer_stream *stream, uint64_t *ts) | |
2239 | { | |
2240 | assert(stream); | |
2241 | assert(stream->ustream); | |
2242 | assert(ts); | |
2243 | ||
2244 | return ustctl_get_current_timestamp(stream->ustream, ts); | |
2245 | } | |
2246 | ||
fb83fe64 JD |
2247 | int lttng_ustconsumer_get_sequence_number( |
2248 | struct lttng_consumer_stream *stream, uint64_t *seq) | |
2249 | { | |
2250 | assert(stream); | |
2251 | assert(stream->ustream); | |
2252 | assert(seq); | |
2253 | ||
2254 | return ustctl_get_sequence_number(stream->ustream, seq); | |
2255 | } | |
2256 | ||
ffe60014 | 2257 | /* |
0dd01979 | 2258 | * Called when the stream signals the consumer that it has hung up. |
ffe60014 DG |
2259 | */ |
2260 | void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream) | |
2261 | { | |
2262 | assert(stream); | |
2263 | assert(stream->ustream); | |
2c1dd183 | 2264 | |
0dd01979 MD |
2265 | pthread_mutex_lock(&stream->lock); |
2266 | if (!stream->quiescent) { | |
2267 | ustctl_flush_buffer(stream->ustream, 0); | |
2268 | stream->quiescent = true; | |
2269 | } | |
2270 | pthread_mutex_unlock(&stream->lock); | |
ffe60014 DG |
2271 | stream->hangup_flush_done = 1; |
2272 | } | |
ee77a7b0 | 2273 | |
ffe60014 DG |
2274 | void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan) |
2275 | { | |
4628484a MD |
2276 | int i; |
2277 | ||
ffe60014 DG |
2278 | assert(chan); |
2279 | assert(chan->uchan); | |
e316aad5 | 2280 | |
ea88ca2a MD |
2281 | if (chan->switch_timer_enabled == 1) { |
2282 | consumer_timer_switch_stop(chan); | |
2283 | } | |
4628484a MD |
2284 | for (i = 0; i < chan->nr_stream_fds; i++) { |
2285 | int ret; | |
2286 | ||
2287 | ret = close(chan->stream_fds[i]); | |
2288 | if (ret) { | |
2289 | PERROR("close"); | |
2290 | } | |
2291 | if (chan->shm_path[0]) { | |
2292 | char shm_path[PATH_MAX]; | |
2293 | ||
2294 | ret = get_stream_shm_path(shm_path, chan->shm_path, i); | |
2295 | if (ret) { | |
2296 | ERR("Cannot get stream shm path"); | |
2297 | } | |
2298 | ret = run_as_unlink(shm_path, chan->uid, chan->gid); | |
2299 | if (ret) { | |
4628484a MD |
2300 | PERROR("unlink %s", shm_path); |
2301 | } | |
2302 | } | |
2303 | } | |
3bd1e081 MD |
2304 | } |
2305 | ||
b83e03c4 MD |
2306 | void lttng_ustconsumer_free_channel(struct lttng_consumer_channel *chan) |
2307 | { | |
2308 | assert(chan); | |
2309 | assert(chan->uchan); | |
2310 | ||
2311 | consumer_metadata_cache_destroy(chan); | |
2312 | ustctl_destroy_channel(chan->uchan); | |
ea853771 JR |
2313 | /* Try to rmdir all directories under shm_path root. */ |
2314 | if (chan->root_shm_path[0]) { | |
602766ec | 2315 | (void) run_as_rmdir_recursive(chan->root_shm_path, |
ea853771 JR |
2316 | chan->uid, chan->gid); |
2317 | } | |
b83e03c4 MD |
2318 | free(chan->stream_fds); |
2319 | } | |
2320 | ||
3bd1e081 MD |
2321 | void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream) |
2322 | { | |
ffe60014 DG |
2323 | assert(stream); |
2324 | assert(stream->ustream); | |
d41f73b7 | 2325 | |
ea88ca2a MD |
2326 | if (stream->chan->switch_timer_enabled == 1) { |
2327 | consumer_timer_switch_stop(stream->chan); | |
2328 | } | |
ffe60014 DG |
2329 | ustctl_destroy_stream(stream->ustream); |
2330 | } | |
d41f73b7 | 2331 | |
6d574024 DG |
2332 | int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream *stream) |
2333 | { | |
2334 | assert(stream); | |
2335 | assert(stream->ustream); | |
2336 | ||
2337 | return ustctl_stream_get_wakeup_fd(stream->ustream); | |
2338 | } | |
2339 | ||
2340 | int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream *stream) | |
2341 | { | |
2342 | assert(stream); | |
2343 | assert(stream->ustream); | |
2344 | ||
2345 | return ustctl_stream_close_wakeup_fd(stream->ustream); | |
2346 | } | |
2347 | ||
309167d2 JD |
2348 | /* |
2349 | * Populate index values of a UST stream. Values are set in big endian order. | |
2350 | * | |
2351 | * Return 0 on success or else a negative value. | |
2352 | */ | |
50adc264 | 2353 | static int get_index_values(struct ctf_packet_index *index, |
309167d2 JD |
2354 | struct ustctl_consumer_stream *ustream) |
2355 | { | |
2356 | int ret; | |
2357 | ||
2358 | ret = ustctl_get_timestamp_begin(ustream, &index->timestamp_begin); | |
2359 | if (ret < 0) { | |
2360 | PERROR("ustctl_get_timestamp_begin"); | |
2361 | goto error; | |
2362 | } | |
2363 | index->timestamp_begin = htobe64(index->timestamp_begin); | |
2364 | ||
2365 | ret = ustctl_get_timestamp_end(ustream, &index->timestamp_end); | |
2366 | if (ret < 0) { | |
2367 | PERROR("ustctl_get_timestamp_end"); | |
2368 | goto error; | |
2369 | } | |
2370 | index->timestamp_end = htobe64(index->timestamp_end); | |
2371 | ||
2372 | ret = ustctl_get_events_discarded(ustream, &index->events_discarded); | |
2373 | if (ret < 0) { | |
2374 | PERROR("ustctl_get_events_discarded"); | |
2375 | goto error; | |
2376 | } | |
2377 | index->events_discarded = htobe64(index->events_discarded); | |
2378 | ||
2379 | ret = ustctl_get_content_size(ustream, &index->content_size); | |
2380 | if (ret < 0) { | |
2381 | PERROR("ustctl_get_content_size"); | |
2382 | goto error; | |
2383 | } | |
2384 | index->content_size = htobe64(index->content_size); | |
2385 | ||
2386 | ret = ustctl_get_packet_size(ustream, &index->packet_size); | |
2387 | if (ret < 0) { | |
2388 | PERROR("ustctl_get_packet_size"); | |
2389 | goto error; | |
2390 | } | |
2391 | index->packet_size = htobe64(index->packet_size); | |
2392 | ||
2393 | ret = ustctl_get_stream_id(ustream, &index->stream_id); | |
2394 | if (ret < 0) { | |
2395 | PERROR("ustctl_get_stream_id"); | |
2396 | goto error; | |
2397 | } | |
2398 | index->stream_id = htobe64(index->stream_id); | |
2399 | ||
234cd636 JD |
2400 | ret = ustctl_get_instance_id(ustream, &index->stream_instance_id); |
2401 | if (ret < 0) { | |
2402 | PERROR("ustctl_get_instance_id"); | |
2403 | goto error; | |
2404 | } | |
2405 | index->stream_instance_id = htobe64(index->stream_instance_id); | |
2406 | ||
2407 | ret = ustctl_get_sequence_number(ustream, &index->packet_seq_num); | |
2408 | if (ret < 0) { | |
2409 | PERROR("ustctl_get_sequence_number"); | |
2410 | goto error; | |
2411 | } | |
2412 | index->packet_seq_num = htobe64(index->packet_seq_num); | |
2413 | ||
309167d2 JD |
2414 | error: |
2415 | return ret; | |
2416 | } | |
2417 | ||
93ec662e JD |
2418 | static |
2419 | void metadata_stream_reset_cache(struct lttng_consumer_stream *stream, | |
2420 | struct consumer_metadata_cache *cache) | |
2421 | { | |
2422 | DBG("Metadata stream update to version %" PRIu64, | |
2423 | cache->version); | |
2424 | stream->ust_metadata_pushed = 0; | |
2425 | stream->metadata_version = cache->version; | |
2426 | stream->reset_metadata_flag = 1; | |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * Check if the version of the metadata stream and metadata cache match. | |
2431 | * If the cache got updated, reset the metadata stream. | |
2432 | * The stream lock and metadata cache lock MUST be held. | |
2433 | * Return 0 on success, a negative value on error. | |
2434 | */ | |
2435 | static | |
2436 | int metadata_stream_check_version(struct lttng_consumer_stream *stream) | |
2437 | { | |
2438 | int ret = 0; | |
2439 | struct consumer_metadata_cache *cache = stream->chan->metadata_cache; | |
2440 | ||
2441 | if (cache->version == stream->metadata_version) { | |
2442 | goto end; | |
2443 | } | |
2444 | metadata_stream_reset_cache(stream, cache); | |
2445 | ||
2446 | end: | |
2447 | return ret; | |
2448 | } | |
2449 | ||
94d49140 JD |
2450 | /* |
2451 | * Write up to one packet from the metadata cache to the channel. | |
2452 | * | |
2453 | * Returns the number of bytes pushed in the cache, or a negative value | |
2454 | * on error. | |
2455 | */ | |
2456 | static | |
2457 | int commit_one_metadata_packet(struct lttng_consumer_stream *stream) | |
2458 | { | |
2459 | ssize_t write_len; | |
2460 | int ret; | |
2461 | ||
2462 | pthread_mutex_lock(&stream->chan->metadata_cache->lock); | |
93ec662e JD |
2463 | ret = metadata_stream_check_version(stream); |
2464 | if (ret < 0) { | |
2465 | goto end; | |
2466 | } | |
c585821b | 2467 | if (stream->chan->metadata_cache->max_offset |
94d49140 JD |
2468 | == stream->ust_metadata_pushed) { |
2469 | ret = 0; | |
2470 | goto end; | |
2471 | } | |
2472 | ||
2473 | write_len = ustctl_write_one_packet_to_channel(stream->chan->uchan, | |
2474 | &stream->chan->metadata_cache->data[stream->ust_metadata_pushed], | |
c585821b | 2475 | stream->chan->metadata_cache->max_offset |
94d49140 JD |
2476 | - stream->ust_metadata_pushed); |
2477 | assert(write_len != 0); | |
2478 | if (write_len < 0) { | |
2479 | ERR("Writing one metadata packet"); | |
2480 | ret = -1; | |
2481 | goto end; | |
2482 | } | |
2483 | stream->ust_metadata_pushed += write_len; | |
2484 | ||
c585821b | 2485 | assert(stream->chan->metadata_cache->max_offset >= |
94d49140 JD |
2486 | stream->ust_metadata_pushed); |
2487 | ret = write_len; | |
2488 | ||
2489 | end: | |
2490 | pthread_mutex_unlock(&stream->chan->metadata_cache->lock); | |
2491 | return ret; | |
2492 | } | |
2493 | ||
309167d2 | 2494 | |
94d49140 JD |
2495 | /* |
2496 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
2497 | * metadata thread can consumer them. | |
2498 | * | |
c585821b MD |
2499 | * Metadata stream lock is held here, but we need to release it when |
2500 | * interacting with sessiond, else we cause a deadlock with live | |
2501 | * awaiting on metadata to be pushed out. | |
94d49140 JD |
2502 | * |
2503 | * Return 0 if new metadatda is available, EAGAIN if the metadata stream | |
2504 | * is empty or a negative value on error. | |
2505 | */ | |
2506 | int lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx, | |
2507 | struct lttng_consumer_stream *metadata) | |
2508 | { | |
2509 | int ret; | |
2510 | int retry = 0; | |
2511 | ||
2512 | assert(ctx); | |
2513 | assert(metadata); | |
2514 | ||
c585821b | 2515 | pthread_mutex_unlock(&metadata->lock); |
94d49140 JD |
2516 | /* |
2517 | * Request metadata from the sessiond, but don't wait for the flush | |
2518 | * because we locked the metadata thread. | |
2519 | */ | |
2520 | ret = lttng_ustconsumer_request_metadata(ctx, metadata->chan, 0, 0); | |
1caeb2eb | 2521 | pthread_mutex_lock(&metadata->lock); |
94d49140 JD |
2522 | if (ret < 0) { |
2523 | goto end; | |
2524 | } | |
2525 | ||
2526 | ret = commit_one_metadata_packet(metadata); | |
2527 | if (ret <= 0) { | |
2528 | goto end; | |
2529 | } else if (ret > 0) { | |
2530 | retry = 1; | |
2531 | } | |
2532 | ||
2533 | ustctl_flush_buffer(metadata->ustream, 1); | |
2534 | ret = ustctl_snapshot(metadata->ustream); | |
2535 | if (ret < 0) { | |
2536 | if (errno != EAGAIN) { | |
2537 | ERR("Sync metadata, taking UST snapshot"); | |
2538 | goto end; | |
2539 | } | |
2540 | DBG("No new metadata when syncing them."); | |
2541 | /* No new metadata, exit. */ | |
2542 | ret = ENODATA; | |
2543 | goto end; | |
2544 | } | |
2545 | ||
2546 | /* | |
2547 | * After this flush, we still need to extract metadata. | |
2548 | */ | |
2549 | if (retry) { | |
2550 | ret = EAGAIN; | |
2551 | } | |
2552 | ||
2553 | end: | |
2554 | return ret; | |
2555 | } | |
2556 | ||
02b3d176 DG |
2557 | /* |
2558 | * Return 0 on success else a negative value. | |
2559 | */ | |
2560 | static int notify_if_more_data(struct lttng_consumer_stream *stream, | |
2561 | struct lttng_consumer_local_data *ctx) | |
2562 | { | |
2563 | int ret; | |
2564 | struct ustctl_consumer_stream *ustream; | |
2565 | ||
2566 | assert(stream); | |
2567 | assert(ctx); | |
2568 | ||
2569 | ustream = stream->ustream; | |
2570 | ||
2571 | /* | |
2572 | * First, we are going to check if there is a new subbuffer available | |
2573 | * before reading the stream wait_fd. | |
2574 | */ | |
2575 | /* Get the next subbuffer */ | |
2576 | ret = ustctl_get_next_subbuf(ustream); | |
2577 | if (ret) { | |
2578 | /* No more data found, flag the stream. */ | |
2579 | stream->has_data = 0; | |
2580 | ret = 0; | |
2581 | goto end; | |
2582 | } | |
2583 | ||
5420e5db | 2584 | ret = ustctl_put_subbuf(ustream); |
02b3d176 DG |
2585 | assert(!ret); |
2586 | ||
2587 | /* This stream still has data. Flag it and wake up the data thread. */ | |
2588 | stream->has_data = 1; | |
2589 | ||
2590 | if (stream->monitor && !stream->hangup_flush_done && !ctx->has_wakeup) { | |
2591 | ssize_t writelen; | |
2592 | ||
2593 | writelen = lttng_pipe_write(ctx->consumer_wakeup_pipe, "!", 1); | |
2594 | if (writelen < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { | |
2595 | ret = writelen; | |
2596 | goto end; | |
2597 | } | |
2598 | ||
2599 | /* The wake up pipe has been notified. */ | |
2600 | ctx->has_wakeup = 1; | |
2601 | } | |
2602 | ret = 0; | |
2603 | ||
2604 | end: | |
2605 | return ret; | |
2606 | } | |
2607 | ||
fb83fe64 JD |
2608 | static |
2609 | int update_stream_stats(struct lttng_consumer_stream *stream) | |
2610 | { | |
2611 | int ret; | |
2612 | uint64_t seq, discarded; | |
2613 | ||
2614 | ret = ustctl_get_sequence_number(stream->ustream, &seq); | |
2615 | if (ret < 0) { | |
2616 | PERROR("ustctl_get_sequence_number"); | |
2617 | goto end; | |
2618 | } | |
2619 | /* | |
2620 | * Start the sequence when we extract the first packet in case we don't | |
2621 | * start at 0 (for example if a consumer is not connected to the | |
2622 | * session immediately after the beginning). | |
2623 | */ | |
2624 | if (stream->last_sequence_number == -1ULL) { | |
2625 | stream->last_sequence_number = seq; | |
2626 | } else if (seq > stream->last_sequence_number) { | |
2627 | stream->chan->lost_packets += seq - | |
2628 | stream->last_sequence_number - 1; | |
2629 | } else { | |
2630 | /* seq <= last_sequence_number */ | |
2631 | ERR("Sequence number inconsistent : prev = %" PRIu64 | |
2632 | ", current = %" PRIu64, | |
2633 | stream->last_sequence_number, seq); | |
2634 | ret = -1; | |
2635 | goto end; | |
2636 | } | |
2637 | stream->last_sequence_number = seq; | |
2638 | ||
2639 | ret = ustctl_get_events_discarded(stream->ustream, &discarded); | |
2640 | if (ret < 0) { | |
2641 | PERROR("kernctl_get_events_discarded"); | |
2642 | goto end; | |
2643 | } | |
2644 | if (discarded < stream->last_discarded_events) { | |
2645 | /* | |
83f4233d MJ |
2646 | * Overflow has occurred. We assume only one wrap-around |
2647 | * has occurred. | |
fb83fe64 JD |
2648 | */ |
2649 | stream->chan->discarded_events += | |
2650 | (1ULL << (CAA_BITS_PER_LONG - 1)) - | |
2651 | stream->last_discarded_events + discarded; | |
2652 | } else { | |
2653 | stream->chan->discarded_events += discarded - | |
2654 | stream->last_discarded_events; | |
2655 | } | |
2656 | stream->last_discarded_events = discarded; | |
2657 | ret = 0; | |
2658 | ||
2659 | end: | |
2660 | return ret; | |
2661 | } | |
2662 | ||
94d49140 JD |
2663 | /* |
2664 | * Read subbuffer from the given stream. | |
2665 | * | |
2666 | * Stream lock MUST be acquired. | |
2667 | * | |
2668 | * Return 0 on success else a negative value. | |
2669 | */ | |
d41f73b7 | 2670 | int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
02d02e31 | 2671 | struct lttng_consumer_local_data *ctx, bool *rotated) |
d41f73b7 | 2672 | { |
1d4dfdef | 2673 | unsigned long len, subbuf_size, padding; |
02d02e31 | 2674 | int err, write_index = 1, rotation_ret; |
d41f73b7 | 2675 | long ret = 0; |
ffe60014 | 2676 | struct ustctl_consumer_stream *ustream; |
50adc264 | 2677 | struct ctf_packet_index index; |
ffe60014 DG |
2678 | |
2679 | assert(stream); | |
2680 | assert(stream->ustream); | |
2681 | assert(ctx); | |
d41f73b7 | 2682 | |
3eb914c0 | 2683 | DBG("In UST read_subbuffer (wait_fd: %d, name: %s)", stream->wait_fd, |
ffe60014 DG |
2684 | stream->name); |
2685 | ||
2686 | /* Ease our life for what's next. */ | |
2687 | ustream = stream->ustream; | |
d41f73b7 | 2688 | |
6cd525e8 | 2689 | /* |
02b3d176 DG |
2690 | * We can consume the 1 byte written into the wait_fd by UST. Don't trigger |
2691 | * error if we cannot read this one byte (read returns 0), or if the error | |
2692 | * is EAGAIN or EWOULDBLOCK. | |
2693 | * | |
2694 | * This is only done when the stream is monitored by a thread, before the | |
2695 | * flush is done after a hangup and if the stream is not flagged with data | |
2696 | * since there might be nothing to consume in the wait fd but still have | |
2697 | * data available flagged by the consumer wake up pipe. | |
6cd525e8 | 2698 | */ |
02b3d176 DG |
2699 | if (stream->monitor && !stream->hangup_flush_done && !stream->has_data) { |
2700 | char dummy; | |
c617c0c6 MD |
2701 | ssize_t readlen; |
2702 | ||
6cd525e8 MD |
2703 | readlen = lttng_read(stream->wait_fd, &dummy, 1); |
2704 | if (readlen < 0 && errno != EAGAIN && errno != EWOULDBLOCK) { | |
effcf122 | 2705 | ret = readlen; |
02d02e31 JD |
2706 | goto error; |
2707 | } | |
2708 | } | |
2709 | ||
2710 | /* | |
2711 | * If the stream was flagged to be ready for rotation before we extract the | |
2712 | * next packet, rotate it now. | |
2713 | */ | |
2714 | if (stream->rotate_ready) { | |
2715 | DBG("Rotate stream before extracting data"); | |
2716 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream, rotated); | |
2717 | if (rotation_ret < 0) { | |
2718 | ERR("Stream rotation error"); | |
2719 | ret = -1; | |
2720 | goto error; | |
effcf122 | 2721 | } |
d41f73b7 MD |
2722 | } |
2723 | ||
04ef1097 | 2724 | retry: |
d41f73b7 | 2725 | /* Get the next subbuffer */ |
ffe60014 | 2726 | err = ustctl_get_next_subbuf(ustream); |
d41f73b7 | 2727 | if (err != 0) { |
04ef1097 MD |
2728 | /* |
2729 | * Populate metadata info if the existing info has | |
2730 | * already been read. | |
2731 | */ | |
2732 | if (stream->metadata_flag) { | |
94d49140 JD |
2733 | ret = commit_one_metadata_packet(stream); |
2734 | if (ret <= 0) { | |
02d02e31 | 2735 | goto error; |
04ef1097 | 2736 | } |
04ef1097 MD |
2737 | ustctl_flush_buffer(stream->ustream, 1); |
2738 | goto retry; | |
2739 | } | |
2740 | ||
1d4dfdef | 2741 | ret = err; /* ustctl_get_next_subbuf returns negative, caller expect positive. */ |
d41f73b7 MD |
2742 | /* |
2743 | * This is a debug message even for single-threaded consumer, | |
2744 | * because poll() have more relaxed criterions than get subbuf, | |
2745 | * so get_subbuf may fail for short race windows where poll() | |
2746 | * would issue wakeups. | |
2747 | */ | |
2748 | DBG("Reserving sub buffer failed (everything is normal, " | |
ffe60014 | 2749 | "it is due to concurrency) [ret: %d]", err); |
02d02e31 | 2750 | goto error; |
d41f73b7 | 2751 | } |
ffe60014 | 2752 | assert(stream->chan->output == CONSUMER_CHANNEL_MMAP); |
309167d2 | 2753 | |
1c20f0e2 | 2754 | if (!stream->metadata_flag) { |
309167d2 JD |
2755 | index.offset = htobe64(stream->out_fd_offset); |
2756 | ret = get_index_values(&index, ustream); | |
2757 | if (ret < 0) { | |
7b87473d MD |
2758 | err = ustctl_put_subbuf(ustream); |
2759 | assert(err == 0); | |
02d02e31 | 2760 | goto error; |
309167d2 | 2761 | } |
fb83fe64 JD |
2762 | |
2763 | /* Update the stream's sequence and discarded events count. */ | |
2764 | ret = update_stream_stats(stream); | |
2765 | if (ret < 0) { | |
2766 | PERROR("kernctl_get_events_discarded"); | |
7b87473d MD |
2767 | err = ustctl_put_subbuf(ustream); |
2768 | assert(err == 0); | |
02d02e31 | 2769 | goto error; |
fb83fe64 | 2770 | } |
1c20f0e2 JD |
2771 | } else { |
2772 | write_index = 0; | |
309167d2 JD |
2773 | } |
2774 | ||
1d4dfdef | 2775 | /* Get the full padded subbuffer size */ |
ffe60014 | 2776 | err = ustctl_get_padded_subbuf_size(ustream, &len); |
effcf122 | 2777 | assert(err == 0); |
1d4dfdef DG |
2778 | |
2779 | /* Get subbuffer data size (without padding) */ | |
ffe60014 | 2780 | err = ustctl_get_subbuf_size(ustream, &subbuf_size); |
1d4dfdef DG |
2781 | assert(err == 0); |
2782 | ||
2783 | /* Make sure we don't get a subbuffer size bigger than the padded */ | |
2784 | assert(len >= subbuf_size); | |
2785 | ||
2786 | padding = len - subbuf_size; | |
02d02e31 | 2787 | |
d41f73b7 | 2788 | /* write the subbuffer to the tracefile */ |
309167d2 | 2789 | ret = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, subbuf_size, padding, &index); |
91dfef6e DG |
2790 | /* |
2791 | * The mmap operation should write subbuf_size amount of data when network | |
2792 | * streaming or the full padding (len) size when we are _not_ streaming. | |
2793 | */ | |
d88aee68 DG |
2794 | if ((ret != subbuf_size && stream->net_seq_idx != (uint64_t) -1ULL) || |
2795 | (ret != len && stream->net_seq_idx == (uint64_t) -1ULL)) { | |
d41f73b7 | 2796 | /* |
91dfef6e | 2797 | * Display the error but continue processing to try to release the |
c5c45efa DG |
2798 | * subbuffer. This is a DBG statement since any unexpected kill or |
2799 | * signal, the application gets unregistered, relayd gets closed or | |
2800 | * anything that affects the buffer lifetime will trigger this error. | |
2801 | * So, for the sake of the user, don't print this error since it can | |
2802 | * happen and it is OK with the code flow. | |
d41f73b7 | 2803 | */ |
c5c45efa | 2804 | DBG("Error writing to tracefile " |
8fd623e0 | 2805 | "(ret: %ld != len: %lu != subbuf_size: %lu)", |
91dfef6e | 2806 | ret, len, subbuf_size); |
309167d2 | 2807 | write_index = 0; |
d41f73b7 | 2808 | } |
ffe60014 | 2809 | err = ustctl_put_next_subbuf(ustream); |
effcf122 | 2810 | assert(err == 0); |
331744e3 | 2811 | |
02b3d176 DG |
2812 | /* |
2813 | * This will consumer the byte on the wait_fd if and only if there is not | |
2814 | * next subbuffer to be acquired. | |
2815 | */ | |
2816 | if (!stream->metadata_flag) { | |
2817 | ret = notify_if_more_data(stream, ctx); | |
2818 | if (ret < 0) { | |
02d02e31 | 2819 | goto error; |
02b3d176 DG |
2820 | } |
2821 | } | |
2822 | ||
309167d2 | 2823 | /* Write index if needed. */ |
1c20f0e2 | 2824 | if (!write_index) { |
02d02e31 | 2825 | goto rotate; |
1c20f0e2 JD |
2826 | } |
2827 | ||
94d49140 JD |
2828 | if (stream->chan->live_timer_interval && !stream->metadata_flag) { |
2829 | /* | |
2830 | * In live, block until all the metadata is sent. | |
2831 | */ | |
c585821b MD |
2832 | pthread_mutex_lock(&stream->metadata_timer_lock); |
2833 | assert(!stream->missed_metadata_flush); | |
2834 | stream->waiting_on_metadata = true; | |
2835 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
2836 | ||
94d49140 | 2837 | err = consumer_stream_sync_metadata(ctx, stream->session_id); |
c585821b MD |
2838 | |
2839 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
2840 | stream->waiting_on_metadata = false; | |
2841 | if (stream->missed_metadata_flush) { | |
2842 | stream->missed_metadata_flush = false; | |
2843 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
2844 | (void) consumer_flush_ust_index(stream); | |
2845 | } else { | |
2846 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
2847 | } | |
2848 | ||
94d49140 | 2849 | if (err < 0) { |
02d02e31 | 2850 | goto error; |
94d49140 JD |
2851 | } |
2852 | } | |
2853 | ||
1c20f0e2 JD |
2854 | assert(!stream->metadata_flag); |
2855 | err = consumer_stream_write_index(stream, &index); | |
2856 | if (err < 0) { | |
02d02e31 | 2857 | goto error; |
309167d2 JD |
2858 | } |
2859 | ||
02d02e31 JD |
2860 | rotate: |
2861 | /* | |
2862 | * After extracting the packet, we check if the stream is now ready to be | |
2863 | * rotated and perform the action immediately. | |
2864 | */ | |
2865 | rotation_ret = lttng_consumer_stream_is_rotate_ready(stream); | |
2866 | if (rotation_ret == 1) { | |
2867 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream, rotated); | |
2868 | if (rotation_ret < 0) { | |
2869 | ERR("Stream rotation error"); | |
2870 | ret = -1; | |
2871 | goto error; | |
2872 | } | |
2873 | } else if (rotation_ret < 0) { | |
2874 | ERR("Checking if stream is ready to rotate"); | |
2875 | ret = -1; | |
2876 | goto error; | |
2877 | } | |
2878 | error: | |
d41f73b7 MD |
2879 | return ret; |
2880 | } | |
2881 | ||
ffe60014 DG |
2882 | /* |
2883 | * Called when a stream is created. | |
fe4477ee JD |
2884 | * |
2885 | * Return 0 on success or else a negative value. | |
ffe60014 | 2886 | */ |
d41f73b7 MD |
2887 | int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream) |
2888 | { | |
fe4477ee JD |
2889 | int ret; |
2890 | ||
10a50311 JD |
2891 | assert(stream); |
2892 | ||
fe4477ee | 2893 | /* Don't create anything if this is set for streaming. */ |
10a50311 | 2894 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor) { |
fe4477ee JD |
2895 | ret = utils_create_stream_file(stream->chan->pathname, stream->name, |
2896 | stream->chan->tracefile_size, stream->tracefile_count_current, | |
309167d2 | 2897 | stream->uid, stream->gid, NULL); |
fe4477ee JD |
2898 | if (ret < 0) { |
2899 | goto error; | |
2900 | } | |
2901 | stream->out_fd = ret; | |
2902 | stream->tracefile_size_current = 0; | |
309167d2 JD |
2903 | |
2904 | if (!stream->metadata_flag) { | |
f8f3885c MD |
2905 | struct lttng_index_file *index_file; |
2906 | ||
2907 | index_file = lttng_index_file_create(stream->chan->pathname, | |
309167d2 JD |
2908 | stream->name, stream->uid, stream->gid, |
2909 | stream->chan->tracefile_size, | |
f8f3885c MD |
2910 | stream->tracefile_count_current, |
2911 | CTF_INDEX_MAJOR, CTF_INDEX_MINOR); | |
2912 | if (!index_file) { | |
309167d2 JD |
2913 | goto error; |
2914 | } | |
1b47ae58 | 2915 | assert(!stream->index_file); |
f8f3885c | 2916 | stream->index_file = index_file; |
309167d2 | 2917 | } |
fe4477ee JD |
2918 | } |
2919 | ret = 0; | |
2920 | ||
2921 | error: | |
2922 | return ret; | |
d41f73b7 | 2923 | } |
ca22feea DG |
2924 | |
2925 | /* | |
2926 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
2927 | * stream. Consumer data lock MUST be acquired before calling this function |
2928 | * and the stream lock. | |
ca22feea | 2929 | * |
6d805429 | 2930 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
2931 | * data is available for trace viewer reading. |
2932 | */ | |
6d805429 | 2933 | int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
2934 | { |
2935 | int ret; | |
2936 | ||
2937 | assert(stream); | |
ffe60014 | 2938 | assert(stream->ustream); |
ca22feea | 2939 | |
6d805429 | 2940 | DBG("UST consumer checking data pending"); |
c8f59ee5 | 2941 | |
ca6b395f MD |
2942 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
2943 | ret = 0; | |
2944 | goto end; | |
2945 | } | |
2946 | ||
04ef1097 | 2947 | if (stream->chan->type == CONSUMER_CHANNEL_TYPE_METADATA) { |
e6ee4eab DG |
2948 | uint64_t contiguous, pushed; |
2949 | ||
2950 | /* Ease our life a bit. */ | |
c585821b | 2951 | contiguous = stream->chan->metadata_cache->max_offset; |
e6ee4eab DG |
2952 | pushed = stream->ust_metadata_pushed; |
2953 | ||
04ef1097 MD |
2954 | /* |
2955 | * We can simply check whether all contiguously available data | |
2956 | * has been pushed to the ring buffer, since the push operation | |
2957 | * is performed within get_next_subbuf(), and because both | |
2958 | * get_next_subbuf() and put_next_subbuf() are issued atomically | |
2959 | * thanks to the stream lock within | |
2960 | * lttng_ustconsumer_read_subbuffer(). This basically means that | |
2961 | * whetnever ust_metadata_pushed is incremented, the associated | |
2962 | * metadata has been consumed from the metadata stream. | |
2963 | */ | |
2964 | DBG("UST consumer metadata pending check: contiguous %" PRIu64 " vs pushed %" PRIu64, | |
e6ee4eab | 2965 | contiguous, pushed); |
aa01b94c | 2966 | assert(((int64_t) (contiguous - pushed)) >= 0); |
e6ee4eab | 2967 | if ((contiguous != pushed) || |
6acdf328 | 2968 | (((int64_t) contiguous - pushed) > 0 || contiguous == 0)) { |
04ef1097 MD |
2969 | ret = 1; /* Data is pending */ |
2970 | goto end; | |
2971 | } | |
2972 | } else { | |
2973 | ret = ustctl_get_next_subbuf(stream->ustream); | |
2974 | if (ret == 0) { | |
2975 | /* | |
2976 | * There is still data so let's put back this | |
2977 | * subbuffer. | |
2978 | */ | |
2979 | ret = ustctl_put_subbuf(stream->ustream); | |
2980 | assert(ret == 0); | |
2981 | ret = 1; /* Data is pending */ | |
2982 | goto end; | |
2983 | } | |
ca22feea DG |
2984 | } |
2985 | ||
6d805429 DG |
2986 | /* Data is NOT pending so ready to be read. */ |
2987 | ret = 0; | |
ca22feea | 2988 | |
6efae65e DG |
2989 | end: |
2990 | return ret; | |
ca22feea | 2991 | } |
d88aee68 | 2992 | |
6d574024 DG |
2993 | /* |
2994 | * Stop a given metadata channel timer if enabled and close the wait fd which | |
2995 | * is the poll pipe of the metadata stream. | |
2996 | * | |
2997 | * This MUST be called with the metadata channel acquired. | |
2998 | */ | |
2999 | void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata) | |
3000 | { | |
3001 | int ret; | |
3002 | ||
3003 | assert(metadata); | |
3004 | assert(metadata->type == CONSUMER_CHANNEL_TYPE_METADATA); | |
3005 | ||
3006 | DBG("Closing metadata channel key %" PRIu64, metadata->key); | |
3007 | ||
3008 | if (metadata->switch_timer_enabled == 1) { | |
3009 | consumer_timer_switch_stop(metadata); | |
3010 | } | |
3011 | ||
3012 | if (!metadata->metadata_stream) { | |
3013 | goto end; | |
3014 | } | |
3015 | ||
3016 | /* | |
3017 | * Closing write side so the thread monitoring the stream wakes up if any | |
3018 | * and clean the metadata stream. | |
3019 | */ | |
3020 | if (metadata->metadata_stream->ust_metadata_poll_pipe[1] >= 0) { | |
3021 | ret = close(metadata->metadata_stream->ust_metadata_poll_pipe[1]); | |
3022 | if (ret < 0) { | |
3023 | PERROR("closing metadata pipe write side"); | |
3024 | } | |
3025 | metadata->metadata_stream->ust_metadata_poll_pipe[1] = -1; | |
3026 | } | |
3027 | ||
3028 | end: | |
3029 | return; | |
3030 | } | |
3031 | ||
d88aee68 DG |
3032 | /* |
3033 | * Close every metadata stream wait fd of the metadata hash table. This | |
3034 | * function MUST be used very carefully so not to run into a race between the | |
3035 | * metadata thread handling streams and this function closing their wait fd. | |
3036 | * | |
3037 | * For UST, this is used when the session daemon hangs up. Its the metadata | |
3038 | * producer so calling this is safe because we are assured that no state change | |
3039 | * can occur in the metadata thread for the streams in the hash table. | |
3040 | */ | |
6d574024 | 3041 | void lttng_ustconsumer_close_all_metadata(struct lttng_ht *metadata_ht) |
d88aee68 | 3042 | { |
d88aee68 DG |
3043 | struct lttng_ht_iter iter; |
3044 | struct lttng_consumer_stream *stream; | |
3045 | ||
3046 | assert(metadata_ht); | |
3047 | assert(metadata_ht->ht); | |
3048 | ||
3049 | DBG("UST consumer closing all metadata streams"); | |
3050 | ||
3051 | rcu_read_lock(); | |
3052 | cds_lfht_for_each_entry(metadata_ht->ht, &iter.iter, stream, | |
3053 | node.node) { | |
9ce5646a MD |
3054 | |
3055 | health_code_update(); | |
3056 | ||
be2b50c7 | 3057 | pthread_mutex_lock(&stream->chan->lock); |
6d574024 | 3058 | lttng_ustconsumer_close_metadata(stream->chan); |
be2b50c7 DG |
3059 | pthread_mutex_unlock(&stream->chan->lock); |
3060 | ||
d88aee68 DG |
3061 | } |
3062 | rcu_read_unlock(); | |
3063 | } | |
d8ef542d MD |
3064 | |
3065 | void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream) | |
3066 | { | |
3067 | int ret; | |
3068 | ||
3069 | ret = ustctl_stream_close_wakeup_fd(stream->ustream); | |
3070 | if (ret < 0) { | |
3071 | ERR("Unable to close wakeup fd"); | |
3072 | } | |
3073 | } | |
331744e3 | 3074 | |
f666ae70 MD |
3075 | /* |
3076 | * Please refer to consumer-timer.c before adding any lock within this | |
3077 | * function or any of its callees. Timers have a very strict locking | |
3078 | * semantic with respect to teardown. Failure to respect this semantic | |
3079 | * introduces deadlocks. | |
c585821b MD |
3080 | * |
3081 | * DON'T hold the metadata lock when calling this function, else this | |
3082 | * can cause deadlock involving consumer awaiting for metadata to be | |
3083 | * pushed out due to concurrent interaction with the session daemon. | |
f666ae70 | 3084 | */ |
331744e3 | 3085 | int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx, |
94d49140 | 3086 | struct lttng_consumer_channel *channel, int timer, int wait) |
331744e3 JD |
3087 | { |
3088 | struct lttcomm_metadata_request_msg request; | |
3089 | struct lttcomm_consumer_msg msg; | |
0c759fc9 | 3090 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
93ec662e | 3091 | uint64_t len, key, offset, version; |
331744e3 JD |
3092 | int ret; |
3093 | ||
3094 | assert(channel); | |
3095 | assert(channel->metadata_cache); | |
3096 | ||
53efb85a MD |
3097 | memset(&request, 0, sizeof(request)); |
3098 | ||
331744e3 JD |
3099 | /* send the metadata request to sessiond */ |
3100 | switch (consumer_data.type) { | |
3101 | case LTTNG_CONSUMER64_UST: | |
3102 | request.bits_per_long = 64; | |
3103 | break; | |
3104 | case LTTNG_CONSUMER32_UST: | |
3105 | request.bits_per_long = 32; | |
3106 | break; | |
3107 | default: | |
3108 | request.bits_per_long = 0; | |
3109 | break; | |
3110 | } | |
3111 | ||
3112 | request.session_id = channel->session_id; | |
1950109e | 3113 | request.session_id_per_pid = channel->session_id_per_pid; |
567eb353 DG |
3114 | /* |
3115 | * Request the application UID here so the metadata of that application can | |
3116 | * be sent back. The channel UID corresponds to the user UID of the session | |
3117 | * used for the rights on the stream file(s). | |
3118 | */ | |
3119 | request.uid = channel->ust_app_uid; | |
331744e3 | 3120 | request.key = channel->key; |
567eb353 | 3121 | |
1950109e | 3122 | DBG("Sending metadata request to sessiond, session id %" PRIu64 |
567eb353 DG |
3123 | ", per-pid %" PRIu64 ", app UID %u and channek key %" PRIu64, |
3124 | request.session_id, request.session_id_per_pid, request.uid, | |
3125 | request.key); | |
331744e3 | 3126 | |
75d83e50 | 3127 | pthread_mutex_lock(&ctx->metadata_socket_lock); |
9ce5646a MD |
3128 | |
3129 | health_code_update(); | |
3130 | ||
331744e3 JD |
3131 | ret = lttcomm_send_unix_sock(ctx->consumer_metadata_socket, &request, |
3132 | sizeof(request)); | |
3133 | if (ret < 0) { | |
3134 | ERR("Asking metadata to sessiond"); | |
3135 | goto end; | |
3136 | } | |
3137 | ||
9ce5646a MD |
3138 | health_code_update(); |
3139 | ||
331744e3 JD |
3140 | /* Receive the metadata from sessiond */ |
3141 | ret = lttcomm_recv_unix_sock(ctx->consumer_metadata_socket, &msg, | |
3142 | sizeof(msg)); | |
3143 | if (ret != sizeof(msg)) { | |
8fd623e0 | 3144 | DBG("Consumer received unexpected message size %d (expects %zu)", |
331744e3 JD |
3145 | ret, sizeof(msg)); |
3146 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); | |
3147 | /* | |
3148 | * The ret value might 0 meaning an orderly shutdown but this is ok | |
3149 | * since the caller handles this. | |
3150 | */ | |
3151 | goto end; | |
3152 | } | |
3153 | ||
9ce5646a MD |
3154 | health_code_update(); |
3155 | ||
331744e3 JD |
3156 | if (msg.cmd_type == LTTNG_ERR_UND) { |
3157 | /* No registry found */ | |
3158 | (void) consumer_send_status_msg(ctx->consumer_metadata_socket, | |
3159 | ret_code); | |
3160 | ret = 0; | |
3161 | goto end; | |
3162 | } else if (msg.cmd_type != LTTNG_CONSUMER_PUSH_METADATA) { | |
3163 | ERR("Unexpected cmd_type received %d", msg.cmd_type); | |
3164 | ret = -1; | |
3165 | goto end; | |
3166 | } | |
3167 | ||
3168 | len = msg.u.push_metadata.len; | |
3169 | key = msg.u.push_metadata.key; | |
3170 | offset = msg.u.push_metadata.target_offset; | |
93ec662e | 3171 | version = msg.u.push_metadata.version; |
331744e3 JD |
3172 | |
3173 | assert(key == channel->key); | |
3174 | if (len == 0) { | |
3175 | DBG("No new metadata to receive for key %" PRIu64, key); | |
3176 | } | |
3177 | ||
9ce5646a MD |
3178 | health_code_update(); |
3179 | ||
331744e3 JD |
3180 | /* Tell session daemon we are ready to receive the metadata. */ |
3181 | ret = consumer_send_status_msg(ctx->consumer_metadata_socket, | |
0c759fc9 | 3182 | LTTCOMM_CONSUMERD_SUCCESS); |
331744e3 JD |
3183 | if (ret < 0 || len == 0) { |
3184 | /* | |
3185 | * Somehow, the session daemon is not responding anymore or there is | |
3186 | * nothing to receive. | |
3187 | */ | |
3188 | goto end; | |
3189 | } | |
3190 | ||
9ce5646a MD |
3191 | health_code_update(); |
3192 | ||
1eb682be | 3193 | ret = lttng_ustconsumer_recv_metadata(ctx->consumer_metadata_socket, |
93ec662e | 3194 | key, offset, len, version, channel, timer, wait); |
1eb682be | 3195 | if (ret >= 0) { |
f2a444f1 DG |
3196 | /* |
3197 | * Only send the status msg if the sessiond is alive meaning a positive | |
3198 | * ret code. | |
3199 | */ | |
1eb682be | 3200 | (void) consumer_send_status_msg(ctx->consumer_metadata_socket, ret); |
f2a444f1 | 3201 | } |
331744e3 JD |
3202 | ret = 0; |
3203 | ||
3204 | end: | |
9ce5646a MD |
3205 | health_code_update(); |
3206 | ||
75d83e50 | 3207 | pthread_mutex_unlock(&ctx->metadata_socket_lock); |
331744e3 JD |
3208 | return ret; |
3209 | } | |
70190e1c DG |
3210 | |
3211 | /* | |
3212 | * Return the ustctl call for the get stream id. | |
3213 | */ | |
3214 | int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream, | |
3215 | uint64_t *stream_id) | |
3216 | { | |
3217 | assert(stream); | |
3218 | assert(stream_id); | |
3219 | ||
3220 | return ustctl_get_stream_id(stream->ustream, stream_id); | |
3221 | } |