Commit | Line | Data |
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3bd1e081 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
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> |
3bd1e081 MD |
22 | #include <poll.h> |
23 | #include <pthread.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/mman.h> | |
27 | #include <sys/socket.h> | |
28 | #include <sys/types.h> | |
77c7c900 | 29 | #include <inttypes.h> |
3bd1e081 | 30 | #include <unistd.h> |
dbb5dfe6 | 31 | #include <sys/stat.h> |
3bd1e081 | 32 | |
51a9e1c7 | 33 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 34 | #include <common/common.h> |
10a8a223 | 35 | #include <common/kernel-ctl/kernel-ctl.h> |
10a8a223 | 36 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 37 | #include <common/sessiond-comm/relayd.h> |
dbb5dfe6 | 38 | #include <common/compat/fcntl.h> |
f263b7fd | 39 | #include <common/compat/endian.h> |
acdb9057 | 40 | #include <common/pipe.h> |
00e2e675 | 41 | #include <common/relayd/relayd.h> |
fe4477ee | 42 | #include <common/utils.h> |
c8fea79c | 43 | #include <common/consumer/consumer-stream.h> |
309167d2 | 44 | #include <common/index/index.h> |
c8fea79c | 45 | #include <common/consumer/consumer-timer.h> |
0857097f | 46 | |
10a8a223 | 47 | #include "kernel-consumer.h" |
3bd1e081 MD |
48 | |
49 | extern struct lttng_consumer_global_data consumer_data; | |
50 | extern int consumer_poll_timeout; | |
3bd1e081 | 51 | |
3bd1e081 MD |
52 | /* |
53 | * Take a snapshot for a specific fd | |
54 | * | |
55 | * Returns 0 on success, < 0 on error | |
56 | */ | |
ffe60014 | 57 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
58 | { |
59 | int ret = 0; | |
60 | int infd = stream->wait_fd; | |
61 | ||
62 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
63 | /* |
64 | * -EAGAIN is not an error, it just means that there is no data to | |
65 | * be read. | |
66 | */ | |
67 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 68 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
69 | } |
70 | ||
71 | return ret; | |
72 | } | |
73 | ||
e9404c27 JG |
74 | /* |
75 | * Sample consumed and produced positions for a specific fd. | |
76 | * | |
77 | * Returns 0 on success, < 0 on error. | |
78 | */ | |
79 | int lttng_kconsumer_sample_snapshot_positions( | |
80 | struct lttng_consumer_stream *stream) | |
81 | { | |
82 | assert(stream); | |
83 | ||
84 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
85 | } | |
86 | ||
3bd1e081 MD |
87 | /* |
88 | * Get the produced position | |
89 | * | |
90 | * Returns 0 on success, < 0 on error | |
91 | */ | |
ffe60014 | 92 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
93 | unsigned long *pos) |
94 | { | |
95 | int ret; | |
96 | int infd = stream->wait_fd; | |
97 | ||
98 | ret = kernctl_snapshot_get_produced(infd, pos); | |
99 | if (ret != 0) { | |
5a510c9f | 100 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
101 | } |
102 | ||
103 | return ret; | |
104 | } | |
105 | ||
07b86b52 JD |
106 | /* |
107 | * Get the consumerd position | |
108 | * | |
109 | * Returns 0 on success, < 0 on error | |
110 | */ | |
111 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
112 | unsigned long *pos) | |
113 | { | |
114 | int ret; | |
115 | int infd = stream->wait_fd; | |
116 | ||
117 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
118 | if (ret != 0) { | |
5a510c9f | 119 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
120 | } |
121 | ||
122 | return ret; | |
123 | } | |
124 | ||
07b86b52 JD |
125 | /* |
126 | * Take a snapshot of all the stream of a channel | |
127 | * | |
128 | * Returns 0 on success, < 0 on error | |
129 | */ | |
130 | int lttng_kconsumer_snapshot_channel(uint64_t key, char *path, | |
d07ceecd | 131 | uint64_t relayd_id, uint64_t nb_packets_per_stream, |
5c786ded | 132 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
133 | { |
134 | int ret; | |
07b86b52 JD |
135 | struct lttng_consumer_channel *channel; |
136 | struct lttng_consumer_stream *stream; | |
137 | ||
6a00837f | 138 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 JD |
139 | |
140 | rcu_read_lock(); | |
141 | ||
142 | channel = consumer_find_channel(key); | |
143 | if (!channel) { | |
6a00837f | 144 | ERR("No channel found for key %" PRIu64, key); |
07b86b52 JD |
145 | ret = -1; |
146 | goto end; | |
147 | } | |
148 | ||
149 | /* Splice is not supported yet for channel snapshot. */ | |
150 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
151 | ERR("Unsupported output %d", channel->output); | |
152 | ret = -1; | |
153 | goto end; | |
154 | } | |
155 | ||
10a50311 | 156 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 157 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
158 | |
159 | health_code_update(); | |
160 | ||
07b86b52 JD |
161 | /* |
162 | * Lock stream because we are about to change its state. | |
163 | */ | |
164 | pthread_mutex_lock(&stream->lock); | |
165 | ||
29decac3 DG |
166 | /* |
167 | * Assign the received relayd ID so we can use it for streaming. The streams | |
168 | * are not visible to anyone so this is OK to change it. | |
169 | */ | |
07b86b52 JD |
170 | stream->net_seq_idx = relayd_id; |
171 | channel->relayd_id = relayd_id; | |
172 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 173 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
174 | if (ret < 0) { |
175 | ERR("sending stream to relayd"); | |
176 | goto end_unlock; | |
177 | } | |
07b86b52 JD |
178 | } else { |
179 | ret = utils_create_stream_file(path, stream->name, | |
10a50311 JD |
180 | stream->chan->tracefile_size, |
181 | stream->tracefile_count_current, | |
309167d2 | 182 | stream->uid, stream->gid, NULL); |
07b86b52 JD |
183 | if (ret < 0) { |
184 | ERR("utils_create_stream_file"); | |
185 | goto end_unlock; | |
186 | } | |
187 | ||
188 | stream->out_fd = ret; | |
189 | stream->tracefile_size_current = 0; | |
190 | ||
81ea21bf MD |
191 | DBG("Kernel consumer snapshot stream %s/%s (%" PRIu64 ")", |
192 | path, stream->name, stream->key); | |
07b86b52 JD |
193 | } |
194 | ||
f22dd891 | 195 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 196 | if (ret < 0) { |
f22dd891 MD |
197 | /* |
198 | * Doing a buffer flush which does not take into | |
199 | * account empty packets. This is not perfect | |
200 | * for stream intersection, but required as a | |
201 | * fall-back when "flush_empty" is not | |
202 | * implemented by lttng-modules. | |
203 | */ | |
204 | ret = kernctl_buffer_flush(stream->wait_fd); | |
205 | if (ret < 0) { | |
206 | ERR("Failed to flush kernel stream"); | |
207 | goto end_unlock; | |
208 | } | |
07b86b52 JD |
209 | goto end_unlock; |
210 | } | |
211 | ||
212 | ret = lttng_kconsumer_take_snapshot(stream); | |
213 | if (ret < 0) { | |
214 | ERR("Taking kernel snapshot"); | |
215 | goto end_unlock; | |
216 | } | |
217 | ||
218 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
219 | if (ret < 0) { | |
220 | ERR("Produced kernel snapshot position"); | |
221 | goto end_unlock; | |
222 | } | |
223 | ||
224 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
225 | if (ret < 0) { | |
226 | ERR("Consumerd kernel snapshot position"); | |
227 | goto end_unlock; | |
228 | } | |
229 | ||
230 | if (stream->max_sb_size == 0) { | |
231 | ret = kernctl_get_max_subbuf_size(stream->wait_fd, | |
232 | &stream->max_sb_size); | |
233 | if (ret < 0) { | |
234 | ERR("Getting kernel max_sb_size"); | |
235 | goto end_unlock; | |
236 | } | |
237 | } | |
238 | ||
d07ceecd MD |
239 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
240 | produced_pos, nb_packets_per_stream, | |
241 | stream->max_sb_size); | |
5c786ded | 242 | |
07b86b52 JD |
243 | while (consumed_pos < produced_pos) { |
244 | ssize_t read_len; | |
245 | unsigned long len, padded_len; | |
246 | ||
9ce5646a MD |
247 | health_code_update(); |
248 | ||
07b86b52 JD |
249 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
250 | ||
251 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
252 | if (ret < 0) { | |
32af2c95 | 253 | if (ret != -EAGAIN) { |
07b86b52 JD |
254 | PERROR("kernctl_get_subbuf snapshot"); |
255 | goto end_unlock; | |
256 | } | |
257 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
258 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 259 | stream->chan->lost_packets++; |
07b86b52 JD |
260 | continue; |
261 | } | |
262 | ||
263 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
264 | if (ret < 0) { | |
265 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 266 | goto error_put_subbuf; |
07b86b52 JD |
267 | } |
268 | ||
269 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
270 | if (ret < 0) { | |
271 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 272 | goto error_put_subbuf; |
07b86b52 JD |
273 | } |
274 | ||
275 | read_len = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, len, | |
309167d2 | 276 | padded_len - len, NULL); |
07b86b52 | 277 | /* |
29decac3 DG |
278 | * We write the padded len in local tracefiles but the data len |
279 | * when using a relay. Display the error but continue processing | |
280 | * to try to release the subbuffer. | |
07b86b52 JD |
281 | */ |
282 | if (relayd_id != (uint64_t) -1ULL) { | |
283 | if (read_len != len) { | |
284 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
285 | read_len, len); | |
286 | } | |
287 | } else { | |
288 | if (read_len != padded_len) { | |
289 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
290 | read_len, padded_len); | |
291 | } | |
292 | } | |
293 | ||
294 | ret = kernctl_put_subbuf(stream->wait_fd); | |
295 | if (ret < 0) { | |
296 | ERR("Snapshot kernctl_put_subbuf"); | |
297 | goto end_unlock; | |
298 | } | |
299 | consumed_pos += stream->max_sb_size; | |
300 | } | |
301 | ||
302 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
303 | if (stream->out_fd >= 0) { |
304 | ret = close(stream->out_fd); | |
305 | if (ret < 0) { | |
306 | PERROR("Kernel consumer snapshot close out_fd"); | |
307 | goto end_unlock; | |
308 | } | |
309 | stream->out_fd = -1; | |
07b86b52 | 310 | } |
07b86b52 JD |
311 | } else { |
312 | close_relayd_stream(stream); | |
313 | stream->net_seq_idx = (uint64_t) -1ULL; | |
314 | } | |
315 | pthread_mutex_unlock(&stream->lock); | |
316 | } | |
317 | ||
318 | /* All good! */ | |
319 | ret = 0; | |
320 | goto end; | |
321 | ||
29decac3 DG |
322 | error_put_subbuf: |
323 | ret = kernctl_put_subbuf(stream->wait_fd); | |
324 | if (ret < 0) { | |
325 | ERR("Snapshot kernctl_put_subbuf error path"); | |
326 | } | |
07b86b52 JD |
327 | end_unlock: |
328 | pthread_mutex_unlock(&stream->lock); | |
329 | end: | |
330 | rcu_read_unlock(); | |
331 | return ret; | |
332 | } | |
333 | ||
334 | /* | |
335 | * Read the whole metadata available for a snapshot. | |
336 | * | |
337 | * Returns 0 on success, < 0 on error | |
338 | */ | |
339 | int lttng_kconsumer_snapshot_metadata(uint64_t key, char *path, | |
e2039c7a | 340 | uint64_t relayd_id, struct lttng_consumer_local_data *ctx) |
07b86b52 | 341 | { |
d771f832 DG |
342 | int ret, use_relayd = 0; |
343 | ssize_t ret_read; | |
07b86b52 JD |
344 | struct lttng_consumer_channel *metadata_channel; |
345 | struct lttng_consumer_stream *metadata_stream; | |
d771f832 DG |
346 | |
347 | assert(ctx); | |
07b86b52 JD |
348 | |
349 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
350 | key, path); | |
351 | ||
352 | rcu_read_lock(); | |
353 | ||
354 | metadata_channel = consumer_find_channel(key); | |
355 | if (!metadata_channel) { | |
d771f832 | 356 | ERR("Kernel snapshot metadata not found for key %" PRIu64, key); |
07b86b52 | 357 | ret = -1; |
d771f832 | 358 | goto error; |
07b86b52 JD |
359 | } |
360 | ||
361 | metadata_stream = metadata_channel->metadata_stream; | |
362 | assert(metadata_stream); | |
363 | ||
d771f832 | 364 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 365 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
366 | use_relayd = 1; |
367 | } | |
368 | ||
369 | if (use_relayd) { | |
10a50311 | 370 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 371 | if (ret < 0) { |
d771f832 | 372 | goto error; |
e2039c7a | 373 | } |
e2039c7a JD |
374 | } else { |
375 | ret = utils_create_stream_file(path, metadata_stream->name, | |
376 | metadata_stream->chan->tracefile_size, | |
377 | metadata_stream->tracefile_count_current, | |
309167d2 | 378 | metadata_stream->uid, metadata_stream->gid, NULL); |
e2039c7a | 379 | if (ret < 0) { |
d771f832 | 380 | goto error; |
e2039c7a JD |
381 | } |
382 | metadata_stream->out_fd = ret; | |
07b86b52 | 383 | } |
07b86b52 | 384 | |
d771f832 | 385 | do { |
9ce5646a MD |
386 | health_code_update(); |
387 | ||
d771f832 DG |
388 | ret_read = lttng_kconsumer_read_subbuffer(metadata_stream, ctx); |
389 | if (ret_read < 0) { | |
56591bac | 390 | if (ret_read != -EAGAIN) { |
6a00837f | 391 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
d771f832 DG |
392 | ret_read); |
393 | goto error; | |
07b86b52 | 394 | } |
d771f832 | 395 | /* ret_read is negative at this point so we will exit the loop. */ |
07b86b52 JD |
396 | continue; |
397 | } | |
d771f832 | 398 | } while (ret_read >= 0); |
07b86b52 | 399 | |
d771f832 DG |
400 | if (use_relayd) { |
401 | close_relayd_stream(metadata_stream); | |
402 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
403 | } else { | |
fdf9986c MD |
404 | if (metadata_stream->out_fd >= 0) { |
405 | ret = close(metadata_stream->out_fd); | |
406 | if (ret < 0) { | |
407 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
408 | /* | |
409 | * Don't go on error here since the snapshot was successful at this | |
410 | * point but somehow the close failed. | |
411 | */ | |
412 | } | |
413 | metadata_stream->out_fd = -1; | |
e2039c7a | 414 | } |
e2039c7a JD |
415 | } |
416 | ||
07b86b52 | 417 | ret = 0; |
d771f832 | 418 | |
cf53a8a6 JD |
419 | cds_list_del(&metadata_stream->send_node); |
420 | consumer_stream_destroy(metadata_stream, NULL); | |
421 | metadata_channel->metadata_stream = NULL; | |
d771f832 | 422 | error: |
07b86b52 JD |
423 | rcu_read_unlock(); |
424 | return ret; | |
425 | } | |
426 | ||
1803a064 MD |
427 | /* |
428 | * Receive command from session daemon and process it. | |
429 | * | |
430 | * Return 1 on success else a negative value or 0. | |
431 | */ | |
3bd1e081 MD |
432 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
433 | int sock, struct pollfd *consumer_sockpoll) | |
434 | { | |
435 | ssize_t ret; | |
0c759fc9 | 436 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
437 | struct lttcomm_consumer_msg msg; |
438 | ||
9ce5646a MD |
439 | health_code_update(); |
440 | ||
3bd1e081 MD |
441 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
442 | if (ret != sizeof(msg)) { | |
1803a064 | 443 | if (ret > 0) { |
c6857fcf | 444 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
1803a064 MD |
445 | ret = -1; |
446 | } | |
3bd1e081 MD |
447 | return ret; |
448 | } | |
9ce5646a MD |
449 | |
450 | health_code_update(); | |
451 | ||
84382d49 MD |
452 | /* Deprecated command */ |
453 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 454 | |
9ce5646a MD |
455 | health_code_update(); |
456 | ||
b0b335c8 MD |
457 | /* relayd needs RCU read-side protection */ |
458 | rcu_read_lock(); | |
459 | ||
3bd1e081 | 460 | switch (msg.cmd_type) { |
00e2e675 DG |
461 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
462 | { | |
f50f23d9 | 463 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 464 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 465 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 | 466 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
2527bf85 | 467 | msg.u.relayd_sock.relayd_session_id); |
00e2e675 DG |
468 | goto end_nosignal; |
469 | } | |
3bd1e081 MD |
470 | case LTTNG_CONSUMER_ADD_CHANNEL: |
471 | { | |
472 | struct lttng_consumer_channel *new_channel; | |
e43c41c5 | 473 | int ret_recv; |
3bd1e081 | 474 | |
9ce5646a MD |
475 | health_code_update(); |
476 | ||
f50f23d9 DG |
477 | /* First send a status message before receiving the fds. */ |
478 | ret = consumer_send_status_msg(sock, ret_code); | |
479 | if (ret < 0) { | |
480 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 481 | goto error_fatal; |
f50f23d9 | 482 | } |
9ce5646a MD |
483 | |
484 | health_code_update(); | |
485 | ||
d88aee68 | 486 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 487 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
ffe60014 DG |
488 | msg.u.channel.session_id, msg.u.channel.pathname, |
489 | msg.u.channel.name, msg.u.channel.uid, msg.u.channel.gid, | |
1624d5b7 JD |
490 | msg.u.channel.relayd_id, msg.u.channel.output, |
491 | msg.u.channel.tracefile_size, | |
1950109e | 492 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 493 | msg.u.channel.monitor, |
d7ba1388 | 494 | msg.u.channel.live_timer_interval, |
3d071855 | 495 | NULL, NULL); |
3bd1e081 | 496 | if (new_channel == NULL) { |
f73fabfd | 497 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
498 | goto end_nosignal; |
499 | } | |
ffe60014 | 500 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
501 | switch (msg.u.channel.output) { |
502 | case LTTNG_EVENT_SPLICE: | |
503 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
504 | break; | |
505 | case LTTNG_EVENT_MMAP: | |
506 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
507 | break; | |
508 | default: | |
509 | ERR("Channel output unknown %d", msg.u.channel.output); | |
510 | goto end_nosignal; | |
511 | } | |
ffe60014 DG |
512 | |
513 | /* Translate and save channel type. */ | |
514 | switch (msg.u.channel.type) { | |
515 | case CONSUMER_CHANNEL_TYPE_DATA: | |
516 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
517 | new_channel->type = msg.u.channel.type; | |
518 | break; | |
519 | default: | |
520 | assert(0); | |
521 | goto end_nosignal; | |
522 | }; | |
523 | ||
9ce5646a MD |
524 | health_code_update(); |
525 | ||
3bd1e081 | 526 | if (ctx->on_recv_channel != NULL) { |
e43c41c5 JD |
527 | ret_recv = ctx->on_recv_channel(new_channel); |
528 | if (ret_recv == 0) { | |
529 | ret = consumer_add_channel(new_channel, ctx); | |
530 | } else if (ret_recv < 0) { | |
3bd1e081 MD |
531 | goto end_nosignal; |
532 | } | |
533 | } else { | |
e43c41c5 | 534 | ret = consumer_add_channel(new_channel, ctx); |
3bd1e081 | 535 | } |
e9404c27 JG |
536 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && !ret) { |
537 | int monitor_start_ret; | |
538 | ||
539 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
540 | consumer_timer_live_start(new_channel, |
541 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
542 | monitor_start_ret = consumer_timer_monitor_start( |
543 | new_channel, | |
544 | msg.u.channel.monitor_timer_interval); | |
545 | if (monitor_start_ret < 0) { | |
546 | ERR("Starting channel monitoring timer failed"); | |
547 | goto end_nosignal; | |
548 | } | |
549 | ||
94d49140 | 550 | } |
e43c41c5 | 551 | |
9ce5646a MD |
552 | health_code_update(); |
553 | ||
e43c41c5 | 554 | /* If we received an error in add_channel, we need to report it. */ |
821fffb2 | 555 | if (ret < 0) { |
1803a064 MD |
556 | ret = consumer_send_status_msg(sock, ret); |
557 | if (ret < 0) { | |
558 | goto error_fatal; | |
559 | } | |
e43c41c5 JD |
560 | goto end_nosignal; |
561 | } | |
562 | ||
3bd1e081 MD |
563 | goto end_nosignal; |
564 | } | |
565 | case LTTNG_CONSUMER_ADD_STREAM: | |
566 | { | |
dae10966 DG |
567 | int fd; |
568 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 569 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 570 | struct lttng_consumer_channel *channel; |
c80048c6 | 571 | int alloc_ret = 0; |
3bd1e081 | 572 | |
ffe60014 DG |
573 | /* |
574 | * Get stream's channel reference. Needed when adding the stream to the | |
575 | * global hash table. | |
576 | */ | |
577 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
578 | if (!channel) { | |
579 | /* | |
580 | * We could not find the channel. Can happen if cpu hotplug | |
581 | * happens while tearing down. | |
582 | */ | |
d88aee68 | 583 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 584 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
585 | } |
586 | ||
9ce5646a MD |
587 | health_code_update(); |
588 | ||
f50f23d9 DG |
589 | /* First send a status message before receiving the fds. */ |
590 | ret = consumer_send_status_msg(sock, ret_code); | |
1803a064 | 591 | if (ret < 0) { |
d771f832 | 592 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 MD |
593 | goto error_fatal; |
594 | } | |
9ce5646a MD |
595 | |
596 | health_code_update(); | |
597 | ||
0c759fc9 | 598 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 599 | /* Channel was not found. */ |
f50f23d9 DG |
600 | goto end_nosignal; |
601 | } | |
602 | ||
d771f832 | 603 | /* Blocking call */ |
9ce5646a MD |
604 | health_poll_entry(); |
605 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
606 | health_poll_exit(); | |
84382d49 MD |
607 | if (ret) { |
608 | goto error_fatal; | |
3bd1e081 | 609 | } |
00e2e675 | 610 | |
9ce5646a MD |
611 | health_code_update(); |
612 | ||
00e2e675 | 613 | /* Get stream file descriptor from socket */ |
f2fc6720 MD |
614 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
615 | if (ret != sizeof(fd)) { | |
f73fabfd | 616 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
3f8e211f | 617 | rcu_read_unlock(); |
3bd1e081 MD |
618 | return ret; |
619 | } | |
3bd1e081 | 620 | |
9ce5646a MD |
621 | health_code_update(); |
622 | ||
f50f23d9 DG |
623 | /* |
624 | * Send status code to session daemon only if the recv works. If the | |
625 | * above recv() failed, the session daemon is notified through the | |
626 | * error socket and the teardown is eventually done. | |
627 | */ | |
628 | ret = consumer_send_status_msg(sock, ret_code); | |
629 | if (ret < 0) { | |
630 | /* Somehow, the session daemon is not responding anymore. */ | |
631 | goto end_nosignal; | |
632 | } | |
633 | ||
9ce5646a MD |
634 | health_code_update(); |
635 | ||
ffe60014 DG |
636 | new_stream = consumer_allocate_stream(channel->key, |
637 | fd, | |
638 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
639 | channel->name, | |
640 | channel->uid, | |
641 | channel->gid, | |
642 | channel->relayd_id, | |
643 | channel->session_id, | |
644 | msg.u.stream.cpu, | |
645 | &alloc_ret, | |
4891ece8 DG |
646 | channel->type, |
647 | channel->monitor); | |
3bd1e081 | 648 | if (new_stream == NULL) { |
c80048c6 MD |
649 | switch (alloc_ret) { |
650 | case -ENOMEM: | |
651 | case -EINVAL: | |
652 | default: | |
653 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
654 | break; | |
c80048c6 | 655 | } |
3f8e211f | 656 | goto end_nosignal; |
3bd1e081 | 657 | } |
d771f832 | 658 | |
ffe60014 DG |
659 | new_stream->chan = channel; |
660 | new_stream->wait_fd = fd; | |
07b86b52 JD |
661 | switch (channel->output) { |
662 | case CONSUMER_CHANNEL_SPLICE: | |
663 | new_stream->output = LTTNG_EVENT_SPLICE; | |
a2361a61 JD |
664 | ret = utils_create_pipe(new_stream->splice_pipe); |
665 | if (ret < 0) { | |
666 | goto end_nosignal; | |
667 | } | |
07b86b52 JD |
668 | break; |
669 | case CONSUMER_CHANNEL_MMAP: | |
670 | new_stream->output = LTTNG_EVENT_MMAP; | |
671 | break; | |
672 | default: | |
673 | ERR("Stream output unknown %d", channel->output); | |
674 | goto end_nosignal; | |
675 | } | |
00e2e675 | 676 | |
a0c83db9 DG |
677 | /* |
678 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
679 | * refcount right now. We don't need to increment the refcount for |
680 | * streams in no monitor because we handle manually the cleanup of | |
681 | * those. It is very important to make sure there is NO prior | |
682 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 683 | */ |
07b86b52 JD |
684 | if (channel->monitor) { |
685 | uatomic_inc(&new_stream->chan->refcount); | |
686 | } | |
9d9353f9 | 687 | |
fb3a43a9 DG |
688 | /* |
689 | * The buffer flush is done on the session daemon side for the kernel | |
690 | * so no need for the stream "hangup_flush_done" variable to be | |
691 | * tracked. This is important for a kernel stream since we don't rely | |
692 | * on the flush state of the stream to read data. It's not the case for | |
693 | * user space tracing. | |
694 | */ | |
695 | new_stream->hangup_flush_done = 0; | |
696 | ||
9ce5646a MD |
697 | health_code_update(); |
698 | ||
633d0084 DG |
699 | if (ctx->on_recv_stream) { |
700 | ret = ctx->on_recv_stream(new_stream); | |
701 | if (ret < 0) { | |
d771f832 | 702 | consumer_stream_free(new_stream); |
633d0084 | 703 | goto end_nosignal; |
fb3a43a9 | 704 | } |
633d0084 | 705 | } |
fb3a43a9 | 706 | |
9ce5646a MD |
707 | health_code_update(); |
708 | ||
07b86b52 JD |
709 | if (new_stream->metadata_flag) { |
710 | channel->metadata_stream = new_stream; | |
711 | } | |
712 | ||
2bba9e53 DG |
713 | /* Do not monitor this stream. */ |
714 | if (!channel->monitor) { | |
5eecee74 | 715 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 716 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 717 | new_stream->net_seq_idx); |
10a50311 | 718 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
6dc3064a DG |
719 | break; |
720 | } | |
721 | ||
e1b71bdc DG |
722 | /* Send stream to relayd if the stream has an ID. */ |
723 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
194ee077 DG |
724 | ret = consumer_send_relayd_stream(new_stream, |
725 | new_stream->chan->pathname); | |
e1b71bdc DG |
726 | if (ret < 0) { |
727 | consumer_stream_free(new_stream); | |
728 | goto end_nosignal; | |
729 | } | |
001b7e62 MD |
730 | |
731 | /* | |
732 | * If adding an extra stream to an already | |
733 | * existing channel (e.g. cpu hotplug), we need | |
734 | * to send the "streams_sent" command to relayd. | |
735 | */ | |
736 | if (channel->streams_sent_to_relayd) { | |
737 | ret = consumer_send_relayd_streams_sent( | |
738 | new_stream->net_seq_idx); | |
739 | if (ret < 0) { | |
740 | goto end_nosignal; | |
741 | } | |
742 | } | |
e2039c7a JD |
743 | } |
744 | ||
50f8ae69 | 745 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 746 | if (new_stream->metadata_flag) { |
66d583dc | 747 | consumer_add_metadata_stream(new_stream); |
dae10966 | 748 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 749 | } else { |
66d583dc | 750 | consumer_add_data_stream(new_stream); |
dae10966 | 751 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
752 | } |
753 | ||
66d583dc | 754 | /* Visible to other threads */ |
5ab66908 MD |
755 | new_stream->globally_visible = 1; |
756 | ||
9ce5646a MD |
757 | health_code_update(); |
758 | ||
dae10966 | 759 | ret = lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream)); |
50f8ae69 | 760 | if (ret < 0) { |
dae10966 | 761 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 762 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 763 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
764 | if (new_stream->metadata_flag) { |
765 | consumer_del_stream_for_metadata(new_stream); | |
766 | } else { | |
767 | consumer_del_stream_for_data(new_stream); | |
768 | } | |
50f8ae69 | 769 | goto end_nosignal; |
3bd1e081 | 770 | } |
00e2e675 | 771 | |
50f8ae69 | 772 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) with relayd id %" PRIu64, |
ffe60014 | 773 | new_stream->name, fd, new_stream->relayd_stream_id); |
3bd1e081 MD |
774 | break; |
775 | } | |
a4baae1b JD |
776 | case LTTNG_CONSUMER_STREAMS_SENT: |
777 | { | |
778 | struct lttng_consumer_channel *channel; | |
779 | ||
780 | /* | |
781 | * Get stream's channel reference. Needed when adding the stream to the | |
782 | * global hash table. | |
783 | */ | |
784 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
785 | if (!channel) { | |
786 | /* | |
787 | * We could not find the channel. Can happen if cpu hotplug | |
788 | * happens while tearing down. | |
789 | */ | |
790 | ERR("Unable to find channel key %" PRIu64, | |
791 | msg.u.sent_streams.channel_key); | |
e462382a | 792 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
793 | } |
794 | ||
795 | health_code_update(); | |
796 | ||
797 | /* | |
798 | * Send status code to session daemon. | |
799 | */ | |
800 | ret = consumer_send_status_msg(sock, ret_code); | |
f261ad0a | 801 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
a4baae1b JD |
802 | /* Somehow, the session daemon is not responding anymore. */ |
803 | goto end_nosignal; | |
804 | } | |
805 | ||
806 | health_code_update(); | |
807 | ||
808 | /* | |
809 | * We should not send this message if we don't monitor the | |
810 | * streams in this channel. | |
811 | */ | |
812 | if (!channel->monitor) { | |
813 | break; | |
814 | } | |
815 | ||
816 | health_code_update(); | |
817 | /* Send stream to relayd if the stream has an ID. */ | |
818 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
819 | ret = consumer_send_relayd_streams_sent( | |
820 | msg.u.sent_streams.net_seq_idx); | |
821 | if (ret < 0) { | |
822 | goto end_nosignal; | |
823 | } | |
001b7e62 | 824 | channel->streams_sent_to_relayd = true; |
a4baae1b JD |
825 | } |
826 | break; | |
827 | } | |
3bd1e081 MD |
828 | case LTTNG_CONSUMER_UPDATE_STREAM: |
829 | { | |
3f8e211f DG |
830 | rcu_read_unlock(); |
831 | return -ENOSYS; | |
832 | } | |
833 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
834 | { | |
a6ba4fe1 | 835 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f DG |
836 | struct consumer_relayd_sock_pair *relayd; |
837 | ||
a6ba4fe1 | 838 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
839 | |
840 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 841 | relayd = consumer_find_relayd(index); |
3f8e211f | 842 | if (relayd == NULL) { |
3448e266 | 843 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 844 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 845 | } |
3f8e211f | 846 | |
a6ba4fe1 DG |
847 | /* |
848 | * Each relayd socket pair has a refcount of stream attached to it | |
849 | * which tells if the relayd is still active or not depending on the | |
850 | * refcount value. | |
851 | * | |
852 | * This will set the destroy flag of the relayd object and destroy it | |
853 | * if the refcount reaches zero when called. | |
854 | * | |
855 | * The destroy can happen either here or when a stream fd hangs up. | |
856 | */ | |
f50f23d9 DG |
857 | if (relayd) { |
858 | consumer_flag_relayd_for_destroy(relayd); | |
859 | } | |
860 | ||
9ce5646a MD |
861 | health_code_update(); |
862 | ||
f50f23d9 DG |
863 | ret = consumer_send_status_msg(sock, ret_code); |
864 | if (ret < 0) { | |
865 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 866 | goto error_fatal; |
f50f23d9 | 867 | } |
3f8e211f | 868 | |
3f8e211f | 869 | goto end_nosignal; |
3bd1e081 | 870 | } |
6d805429 | 871 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 872 | { |
c8f59ee5 | 873 | int32_t ret; |
6d805429 | 874 | uint64_t id = msg.u.data_pending.session_id; |
c8f59ee5 | 875 | |
6d805429 | 876 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 877 | |
6d805429 | 878 | ret = consumer_data_pending(id); |
c8f59ee5 | 879 | |
9ce5646a MD |
880 | health_code_update(); |
881 | ||
c8f59ee5 DG |
882 | /* Send back returned value to session daemon */ |
883 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
884 | if (ret < 0) { | |
6d805429 | 885 | PERROR("send data pending ret code"); |
1803a064 | 886 | goto error_fatal; |
c8f59ee5 | 887 | } |
f50f23d9 DG |
888 | |
889 | /* | |
890 | * No need to send back a status message since the data pending | |
891 | * returned value is the response. | |
892 | */ | |
c8f59ee5 | 893 | break; |
53632229 | 894 | } |
6dc3064a DG |
895 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
896 | { | |
07b86b52 JD |
897 | if (msg.u.snapshot_channel.metadata == 1) { |
898 | ret = lttng_kconsumer_snapshot_metadata(msg.u.snapshot_channel.key, | |
e2039c7a JD |
899 | msg.u.snapshot_channel.pathname, |
900 | msg.u.snapshot_channel.relayd_id, ctx); | |
07b86b52 JD |
901 | if (ret < 0) { |
902 | ERR("Snapshot metadata failed"); | |
e462382a | 903 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; |
07b86b52 JD |
904 | } |
905 | } else { | |
906 | ret = lttng_kconsumer_snapshot_channel(msg.u.snapshot_channel.key, | |
907 | msg.u.snapshot_channel.pathname, | |
5c786ded | 908 | msg.u.snapshot_channel.relayd_id, |
d07ceecd | 909 | msg.u.snapshot_channel.nb_packets_per_stream, |
5c786ded | 910 | ctx); |
07b86b52 JD |
911 | if (ret < 0) { |
912 | ERR("Snapshot channel failed"); | |
e462382a | 913 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
914 | } |
915 | } | |
916 | ||
9ce5646a MD |
917 | health_code_update(); |
918 | ||
6dc3064a DG |
919 | ret = consumer_send_status_msg(sock, ret_code); |
920 | if (ret < 0) { | |
921 | /* Somehow, the session daemon is not responding anymore. */ | |
922 | goto end_nosignal; | |
923 | } | |
924 | break; | |
925 | } | |
07b86b52 JD |
926 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
927 | { | |
928 | uint64_t key = msg.u.destroy_channel.key; | |
929 | struct lttng_consumer_channel *channel; | |
930 | ||
931 | channel = consumer_find_channel(key); | |
932 | if (!channel) { | |
933 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 934 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
935 | } |
936 | ||
9ce5646a MD |
937 | health_code_update(); |
938 | ||
07b86b52 JD |
939 | ret = consumer_send_status_msg(sock, ret_code); |
940 | if (ret < 0) { | |
941 | /* Somehow, the session daemon is not responding anymore. */ | |
942 | goto end_nosignal; | |
943 | } | |
944 | ||
9ce5646a MD |
945 | health_code_update(); |
946 | ||
15dc512a DG |
947 | /* Stop right now if no channel was found. */ |
948 | if (!channel) { | |
949 | goto end_nosignal; | |
950 | } | |
951 | ||
07b86b52 JD |
952 | /* |
953 | * This command should ONLY be issued for channel with streams set in | |
954 | * no monitor mode. | |
955 | */ | |
956 | assert(!channel->monitor); | |
957 | ||
958 | /* | |
959 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
960 | * monitor mode. | |
961 | */ | |
962 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
963 | ||
964 | consumer_del_channel(channel); | |
965 | ||
966 | goto end_nosignal; | |
967 | } | |
fb83fe64 JD |
968 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
969 | { | |
66ab32be JD |
970 | ssize_t ret; |
971 | uint64_t count; | |
fb83fe64 JD |
972 | struct lttng_consumer_channel *channel; |
973 | uint64_t id = msg.u.discarded_events.session_id; | |
974 | uint64_t key = msg.u.discarded_events.channel_key; | |
975 | ||
e5742757 MD |
976 | DBG("Kernel consumer discarded events command for session id %" |
977 | PRIu64 ", channel key %" PRIu64, id, key); | |
978 | ||
fb83fe64 JD |
979 | channel = consumer_find_channel(key); |
980 | if (!channel) { | |
981 | ERR("Kernel consumer discarded events channel %" | |
982 | PRIu64 " not found", key); | |
66ab32be | 983 | count = 0; |
e5742757 | 984 | } else { |
66ab32be | 985 | count = channel->discarded_events; |
fb83fe64 JD |
986 | } |
987 | ||
fb83fe64 JD |
988 | health_code_update(); |
989 | ||
990 | /* Send back returned value to session daemon */ | |
66ab32be | 991 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
992 | if (ret < 0) { |
993 | PERROR("send discarded events"); | |
994 | goto error_fatal; | |
995 | } | |
996 | ||
997 | break; | |
998 | } | |
999 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1000 | { | |
66ab32be JD |
1001 | ssize_t ret; |
1002 | uint64_t count; | |
fb83fe64 JD |
1003 | struct lttng_consumer_channel *channel; |
1004 | uint64_t id = msg.u.lost_packets.session_id; | |
1005 | uint64_t key = msg.u.lost_packets.channel_key; | |
1006 | ||
e5742757 MD |
1007 | DBG("Kernel consumer lost packets command for session id %" |
1008 | PRIu64 ", channel key %" PRIu64, id, key); | |
1009 | ||
fb83fe64 JD |
1010 | channel = consumer_find_channel(key); |
1011 | if (!channel) { | |
1012 | ERR("Kernel consumer lost packets channel %" | |
1013 | PRIu64 " not found", key); | |
66ab32be | 1014 | count = 0; |
e5742757 | 1015 | } else { |
66ab32be | 1016 | count = channel->lost_packets; |
fb83fe64 JD |
1017 | } |
1018 | ||
fb83fe64 JD |
1019 | health_code_update(); |
1020 | ||
1021 | /* Send back returned value to session daemon */ | |
66ab32be | 1022 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1023 | if (ret < 0) { |
1024 | PERROR("send lost packets"); | |
1025 | goto error_fatal; | |
1026 | } | |
1027 | ||
1028 | break; | |
1029 | } | |
b3530820 JG |
1030 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1031 | { | |
1032 | int channel_monitor_pipe; | |
1033 | ||
1034 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1035 | /* Successfully received the command's type. */ | |
1036 | ret = consumer_send_status_msg(sock, ret_code); | |
1037 | if (ret < 0) { | |
1038 | goto error_fatal; | |
1039 | } | |
1040 | ||
1041 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, | |
1042 | 1); | |
1043 | if (ret != sizeof(channel_monitor_pipe)) { | |
1044 | ERR("Failed to receive channel monitor pipe"); | |
1045 | goto error_fatal; | |
1046 | } | |
1047 | ||
1048 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
1049 | ret = consumer_timer_thread_set_channel_monitor_pipe( | |
1050 | channel_monitor_pipe); | |
1051 | if (!ret) { | |
1052 | int flags; | |
1053 | ||
1054 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1055 | /* Set the pipe as non-blocking. */ | |
1056 | ret = fcntl(channel_monitor_pipe, F_GETFL, 0); | |
1057 | if (ret == -1) { | |
1058 | PERROR("fcntl get flags of the channel monitoring pipe"); | |
1059 | goto error_fatal; | |
1060 | } | |
1061 | flags = ret; | |
1062 | ||
1063 | ret = fcntl(channel_monitor_pipe, F_SETFL, | |
1064 | flags | O_NONBLOCK); | |
1065 | if (ret == -1) { | |
1066 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); | |
1067 | goto error_fatal; | |
1068 | } | |
1069 | DBG("Channel monitor pipe set as non-blocking"); | |
1070 | } else { | |
1071 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1072 | } | |
1073 | ret = consumer_send_status_msg(sock, ret_code); | |
1074 | if (ret < 0) { | |
1075 | goto error_fatal; | |
1076 | } | |
1077 | break; | |
1078 | } | |
00fb02ac JD |
1079 | case LTTNG_CONSUMER_ROTATE_RENAME: |
1080 | { | |
1081 | DBG("Consumer rename session %" PRIu64 " after rotation, old path = \"%s\", new path = \"%s\"", | |
1082 | msg.u.rotate_rename.session_id, | |
1083 | msg.u.rotate_rename.old_path, | |
1084 | msg.u.rotate_rename.new_path); | |
1085 | ret = lttng_consumer_rotate_rename(msg.u.rotate_rename.old_path, | |
1086 | msg.u.rotate_rename.new_path, | |
1087 | msg.u.rotate_rename.uid, | |
1088 | msg.u.rotate_rename.gid, | |
1089 | msg.u.rotate_rename.relayd_id); | |
1090 | if (ret < 0) { | |
1091 | ERR("Rotate rename failed"); | |
1092 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1093 | } | |
1094 | ||
1095 | health_code_update(); | |
1096 | ||
1097 | ret = consumer_send_status_msg(sock, ret_code); | |
1098 | if (ret < 0) { | |
1099 | /* Somehow, the session daemon is not responding anymore. */ | |
1100 | goto end_nosignal; | |
1101 | } | |
1102 | break; | |
1103 | } | |
a1ae2ea5 JD |
1104 | case LTTNG_CONSUMER_MKDIR: |
1105 | { | |
1106 | DBG("Consumer mkdir %s in session %" PRIu64, | |
1107 | msg.u.mkdir.path, | |
1108 | msg.u.mkdir.session_id); | |
1109 | ret = lttng_consumer_mkdir(msg.u.mkdir.path, | |
1110 | msg.u.mkdir.uid, | |
1111 | msg.u.mkdir.gid, | |
1112 | msg.u.mkdir.relayd_id); | |
1113 | if (ret < 0) { | |
1114 | ERR("consumer mkdir failed"); | |
1115 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1116 | } | |
1117 | ||
1118 | health_code_update(); | |
1119 | ||
1120 | ret = consumer_send_status_msg(sock, ret_code); | |
1121 | if (ret < 0) { | |
1122 | /* Somehow, the session daemon is not responding anymore. */ | |
1123 | goto end_nosignal; | |
1124 | } | |
1125 | break; | |
1126 | } | |
3bd1e081 | 1127 | default: |
3f8e211f | 1128 | goto end_nosignal; |
3bd1e081 | 1129 | } |
3f8e211f | 1130 | |
3bd1e081 | 1131 | end_nosignal: |
b0b335c8 | 1132 | rcu_read_unlock(); |
4cbc1a04 DG |
1133 | |
1134 | /* | |
1135 | * Return 1 to indicate success since the 0 value can be a socket | |
1136 | * shutdown during the recv() or send() call. | |
1137 | */ | |
9ce5646a | 1138 | health_code_update(); |
4cbc1a04 | 1139 | return 1; |
1803a064 MD |
1140 | |
1141 | error_fatal: | |
1142 | rcu_read_unlock(); | |
1143 | /* This will issue a consumer stop. */ | |
1144 | return -1; | |
3bd1e081 | 1145 | } |
d41f73b7 | 1146 | |
309167d2 JD |
1147 | /* |
1148 | * Populate index values of a kernel stream. Values are set in big endian order. | |
1149 | * | |
1150 | * Return 0 on success or else a negative value. | |
1151 | */ | |
50adc264 | 1152 | static int get_index_values(struct ctf_packet_index *index, int infd) |
309167d2 JD |
1153 | { |
1154 | int ret; | |
1155 | ||
1156 | ret = kernctl_get_timestamp_begin(infd, &index->timestamp_begin); | |
1157 | if (ret < 0) { | |
1158 | PERROR("kernctl_get_timestamp_begin"); | |
1159 | goto error; | |
1160 | } | |
1161 | index->timestamp_begin = htobe64(index->timestamp_begin); | |
1162 | ||
1163 | ret = kernctl_get_timestamp_end(infd, &index->timestamp_end); | |
1164 | if (ret < 0) { | |
1165 | PERROR("kernctl_get_timestamp_end"); | |
1166 | goto error; | |
1167 | } | |
1168 | index->timestamp_end = htobe64(index->timestamp_end); | |
1169 | ||
1170 | ret = kernctl_get_events_discarded(infd, &index->events_discarded); | |
1171 | if (ret < 0) { | |
1172 | PERROR("kernctl_get_events_discarded"); | |
1173 | goto error; | |
1174 | } | |
1175 | index->events_discarded = htobe64(index->events_discarded); | |
1176 | ||
1177 | ret = kernctl_get_content_size(infd, &index->content_size); | |
1178 | if (ret < 0) { | |
1179 | PERROR("kernctl_get_content_size"); | |
1180 | goto error; | |
1181 | } | |
1182 | index->content_size = htobe64(index->content_size); | |
1183 | ||
1184 | ret = kernctl_get_packet_size(infd, &index->packet_size); | |
1185 | if (ret < 0) { | |
1186 | PERROR("kernctl_get_packet_size"); | |
1187 | goto error; | |
1188 | } | |
1189 | index->packet_size = htobe64(index->packet_size); | |
1190 | ||
1191 | ret = kernctl_get_stream_id(infd, &index->stream_id); | |
1192 | if (ret < 0) { | |
1193 | PERROR("kernctl_get_stream_id"); | |
1194 | goto error; | |
1195 | } | |
1196 | index->stream_id = htobe64(index->stream_id); | |
1197 | ||
234cd636 JD |
1198 | ret = kernctl_get_instance_id(infd, &index->stream_instance_id); |
1199 | if (ret < 0) { | |
f0b03c22 MD |
1200 | if (ret == -ENOTTY) { |
1201 | /* Command not implemented by lttng-modules. */ | |
1202 | index->stream_instance_id = -1ULL; | |
f0b03c22 MD |
1203 | } else { |
1204 | PERROR("kernctl_get_instance_id"); | |
1205 | goto error; | |
1206 | } | |
234cd636 JD |
1207 | } |
1208 | index->stream_instance_id = htobe64(index->stream_instance_id); | |
1209 | ||
1210 | ret = kernctl_get_sequence_number(infd, &index->packet_seq_num); | |
1211 | if (ret < 0) { | |
f0b03c22 MD |
1212 | if (ret == -ENOTTY) { |
1213 | /* Command not implemented by lttng-modules. */ | |
1214 | index->packet_seq_num = -1ULL; | |
1215 | ret = 0; | |
1216 | } else { | |
1217 | PERROR("kernctl_get_sequence_number"); | |
1218 | goto error; | |
1219 | } | |
234cd636 JD |
1220 | } |
1221 | index->packet_seq_num = htobe64(index->packet_seq_num); | |
1222 | ||
309167d2 JD |
1223 | error: |
1224 | return ret; | |
1225 | } | |
94d49140 JD |
1226 | /* |
1227 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1228 | * metadata thread can consumer them. | |
1229 | * | |
1230 | * Metadata stream lock MUST be acquired. | |
1231 | * | |
1232 | * Return 0 if new metadatda is available, EAGAIN if the metadata stream | |
1233 | * is empty or a negative value on error. | |
1234 | */ | |
1235 | int lttng_kconsumer_sync_metadata(struct lttng_consumer_stream *metadata) | |
1236 | { | |
1237 | int ret; | |
1238 | ||
1239 | assert(metadata); | |
1240 | ||
1241 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1242 | if (ret < 0) { | |
1243 | ERR("Failed to flush kernel stream"); | |
1244 | goto end; | |
1245 | } | |
1246 | ||
1247 | ret = kernctl_snapshot(metadata->wait_fd); | |
1248 | if (ret < 0) { | |
32af2c95 | 1249 | if (ret != -EAGAIN) { |
94d49140 JD |
1250 | ERR("Sync metadata, taking kernel snapshot failed."); |
1251 | goto end; | |
1252 | } | |
1253 | DBG("Sync metadata, no new kernel metadata"); | |
1254 | /* No new metadata, exit. */ | |
1255 | ret = ENODATA; | |
1256 | goto end; | |
1257 | } | |
1258 | ||
1259 | end: | |
1260 | return ret; | |
1261 | } | |
309167d2 | 1262 | |
fb83fe64 JD |
1263 | static |
1264 | int update_stream_stats(struct lttng_consumer_stream *stream) | |
1265 | { | |
1266 | int ret; | |
1267 | uint64_t seq, discarded; | |
1268 | ||
1269 | ret = kernctl_get_sequence_number(stream->wait_fd, &seq); | |
1270 | if (ret < 0) { | |
f0b03c22 MD |
1271 | if (ret == -ENOTTY) { |
1272 | /* Command not implemented by lttng-modules. */ | |
1273 | seq = -1ULL; | |
f0b03c22 MD |
1274 | } else { |
1275 | PERROR("kernctl_get_sequence_number"); | |
1276 | goto end; | |
1277 | } | |
fb83fe64 JD |
1278 | } |
1279 | ||
1280 | /* | |
1281 | * Start the sequence when we extract the first packet in case we don't | |
1282 | * start at 0 (for example if a consumer is not connected to the | |
1283 | * session immediately after the beginning). | |
1284 | */ | |
1285 | if (stream->last_sequence_number == -1ULL) { | |
1286 | stream->last_sequence_number = seq; | |
1287 | } else if (seq > stream->last_sequence_number) { | |
1288 | stream->chan->lost_packets += seq - | |
1289 | stream->last_sequence_number - 1; | |
1290 | } else { | |
1291 | /* seq <= last_sequence_number */ | |
1292 | ERR("Sequence number inconsistent : prev = %" PRIu64 | |
1293 | ", current = %" PRIu64, | |
1294 | stream->last_sequence_number, seq); | |
1295 | ret = -1; | |
1296 | goto end; | |
1297 | } | |
1298 | stream->last_sequence_number = seq; | |
1299 | ||
1300 | ret = kernctl_get_events_discarded(stream->wait_fd, &discarded); | |
1301 | if (ret < 0) { | |
1302 | PERROR("kernctl_get_events_discarded"); | |
1303 | goto end; | |
1304 | } | |
1305 | if (discarded < stream->last_discarded_events) { | |
1306 | /* | |
83f4233d MJ |
1307 | * Overflow has occurred. We assume only one wrap-around |
1308 | * has occurred. | |
fb83fe64 JD |
1309 | */ |
1310 | stream->chan->discarded_events += (1ULL << (CAA_BITS_PER_LONG - 1)) - | |
1311 | stream->last_discarded_events + discarded; | |
1312 | } else { | |
1313 | stream->chan->discarded_events += discarded - | |
1314 | stream->last_discarded_events; | |
1315 | } | |
1316 | stream->last_discarded_events = discarded; | |
1317 | ret = 0; | |
1318 | ||
1319 | end: | |
1320 | return ret; | |
1321 | } | |
1322 | ||
93ec662e JD |
1323 | /* |
1324 | * Check if the local version of the metadata stream matches with the version | |
1325 | * of the metadata stream in the kernel. If it was updated, set the reset flag | |
1326 | * on the stream. | |
1327 | */ | |
1328 | static | |
1329 | int metadata_stream_check_version(int infd, struct lttng_consumer_stream *stream) | |
1330 | { | |
1331 | int ret; | |
1332 | uint64_t cur_version; | |
1333 | ||
1334 | ret = kernctl_get_metadata_version(infd, &cur_version); | |
1335 | if (ret < 0) { | |
f0b03c22 MD |
1336 | if (ret == -ENOTTY) { |
1337 | /* | |
1338 | * LTTng-modules does not implement this | |
1339 | * command. | |
1340 | */ | |
1341 | ret = 0; | |
1342 | goto end; | |
1343 | } | |
93ec662e JD |
1344 | ERR("Failed to get the metadata version"); |
1345 | goto end; | |
1346 | } | |
1347 | ||
1348 | if (stream->metadata_version == cur_version) { | |
1349 | ret = 0; | |
1350 | goto end; | |
1351 | } | |
1352 | ||
1353 | DBG("New metadata version detected"); | |
1354 | stream->metadata_version = cur_version; | |
1355 | stream->reset_metadata_flag = 1; | |
1356 | ret = 0; | |
1357 | ||
1358 | end: | |
1359 | return ret; | |
1360 | } | |
1361 | ||
d41f73b7 MD |
1362 | /* |
1363 | * Consume data on a file descriptor and write it on a trace file. | |
1364 | */ | |
4078b776 | 1365 | ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
1366 | struct lttng_consumer_local_data *ctx) |
1367 | { | |
1d4dfdef | 1368 | unsigned long len, subbuf_size, padding; |
1c20f0e2 | 1369 | int err, write_index = 1; |
4078b776 | 1370 | ssize_t ret = 0; |
d41f73b7 | 1371 | int infd = stream->wait_fd; |
50adc264 | 1372 | struct ctf_packet_index index; |
d41f73b7 MD |
1373 | |
1374 | DBG("In read_subbuffer (infd : %d)", infd); | |
309167d2 | 1375 | |
d41f73b7 MD |
1376 | /* Get the next subbuffer */ |
1377 | err = kernctl_get_next_subbuf(infd); | |
1378 | if (err != 0) { | |
d41f73b7 MD |
1379 | /* |
1380 | * This is a debug message even for single-threaded consumer, | |
1381 | * because poll() have more relaxed criterions than get subbuf, | |
1382 | * so get_subbuf may fail for short race windows where poll() | |
1383 | * would issue wakeups. | |
1384 | */ | |
1385 | DBG("Reserving sub buffer failed (everything is normal, " | |
1386 | "it is due to concurrency)"); | |
32af2c95 | 1387 | ret = err; |
d41f73b7 MD |
1388 | goto end; |
1389 | } | |
1390 | ||
1d4dfdef DG |
1391 | /* Get the full subbuffer size including padding */ |
1392 | err = kernctl_get_padded_subbuf_size(infd, &len); | |
1393 | if (err != 0) { | |
5a510c9f | 1394 | PERROR("Getting sub-buffer len failed."); |
8265f19e MD |
1395 | err = kernctl_put_subbuf(infd); |
1396 | if (err != 0) { | |
32af2c95 | 1397 | if (err == -EFAULT) { |
5a510c9f | 1398 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1399 | } else if (err == -EIO) { |
8265f19e | 1400 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1401 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1402 | } |
32af2c95 | 1403 | ret = err; |
8265f19e MD |
1404 | goto end; |
1405 | } | |
32af2c95 | 1406 | ret = err; |
1d4dfdef DG |
1407 | goto end; |
1408 | } | |
1409 | ||
1c20f0e2 | 1410 | if (!stream->metadata_flag) { |
309167d2 JD |
1411 | ret = get_index_values(&index, infd); |
1412 | if (ret < 0) { | |
8265f19e MD |
1413 | err = kernctl_put_subbuf(infd); |
1414 | if (err != 0) { | |
32af2c95 | 1415 | if (err == -EFAULT) { |
5a510c9f | 1416 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1417 | } else if (err == -EIO) { |
8265f19e | 1418 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1419 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1420 | } |
32af2c95 | 1421 | ret = err; |
8265f19e MD |
1422 | goto end; |
1423 | } | |
309167d2 JD |
1424 | goto end; |
1425 | } | |
fb83fe64 JD |
1426 | ret = update_stream_stats(stream); |
1427 | if (ret < 0) { | |
7b87473d MD |
1428 | err = kernctl_put_subbuf(infd); |
1429 | if (err != 0) { | |
1430 | if (err == -EFAULT) { | |
1431 | PERROR("Error in unreserving sub buffer\n"); | |
1432 | } else if (err == -EIO) { | |
1433 | /* Should never happen with newer LTTng versions */ | |
1434 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); | |
1435 | } | |
1436 | ret = err; | |
1437 | goto end; | |
1438 | } | |
fb83fe64 JD |
1439 | goto end; |
1440 | } | |
1c20f0e2 JD |
1441 | } else { |
1442 | write_index = 0; | |
93ec662e JD |
1443 | ret = metadata_stream_check_version(infd, stream); |
1444 | if (ret < 0) { | |
7b87473d MD |
1445 | err = kernctl_put_subbuf(infd); |
1446 | if (err != 0) { | |
1447 | if (err == -EFAULT) { | |
1448 | PERROR("Error in unreserving sub buffer\n"); | |
1449 | } else if (err == -EIO) { | |
1450 | /* Should never happen with newer LTTng versions */ | |
1451 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); | |
1452 | } | |
1453 | ret = err; | |
1454 | goto end; | |
1455 | } | |
93ec662e JD |
1456 | goto end; |
1457 | } | |
309167d2 JD |
1458 | } |
1459 | ||
ffe60014 | 1460 | switch (stream->chan->output) { |
07b86b52 | 1461 | case CONSUMER_CHANNEL_SPLICE: |
1d4dfdef DG |
1462 | /* |
1463 | * XXX: The lttng-modules splice "actor" does not handle copying | |
1464 | * partial pages hence only using the subbuffer size without the | |
1465 | * padding makes the splice fail. | |
1466 | */ | |
1467 | subbuf_size = len; | |
1468 | padding = 0; | |
1469 | ||
1470 | /* splice the subbuffer to the tracefile */ | |
91dfef6e | 1471 | ret = lttng_consumer_on_read_subbuffer_splice(ctx, stream, subbuf_size, |
309167d2 | 1472 | padding, &index); |
91dfef6e DG |
1473 | /* |
1474 | * XXX: Splice does not support network streaming so the return value | |
1475 | * is simply checked against subbuf_size and not like the mmap() op. | |
1476 | */ | |
1d4dfdef DG |
1477 | if (ret != subbuf_size) { |
1478 | /* | |
1479 | * display the error but continue processing to try | |
1480 | * to release the subbuffer | |
1481 | */ | |
1482 | ERR("Error splicing to tracefile (ret: %zd != len: %lu)", | |
1483 | ret, subbuf_size); | |
309167d2 | 1484 | write_index = 0; |
1d4dfdef DG |
1485 | } |
1486 | break; | |
07b86b52 | 1487 | case CONSUMER_CHANNEL_MMAP: |
1d4dfdef DG |
1488 | /* Get subbuffer size without padding */ |
1489 | err = kernctl_get_subbuf_size(infd, &subbuf_size); | |
1490 | if (err != 0) { | |
5a510c9f | 1491 | PERROR("Getting sub-buffer len failed."); |
8265f19e MD |
1492 | err = kernctl_put_subbuf(infd); |
1493 | if (err != 0) { | |
32af2c95 | 1494 | if (err == -EFAULT) { |
5a510c9f | 1495 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1496 | } else if (err == -EIO) { |
8265f19e | 1497 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1498 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1499 | } |
32af2c95 | 1500 | ret = err; |
8265f19e MD |
1501 | goto end; |
1502 | } | |
32af2c95 | 1503 | ret = err; |
1d4dfdef DG |
1504 | goto end; |
1505 | } | |
47e81c02 | 1506 | |
1d4dfdef DG |
1507 | /* Make sure the tracer is not gone mad on us! */ |
1508 | assert(len >= subbuf_size); | |
1509 | ||
1510 | padding = len - subbuf_size; | |
1511 | ||
1512 | /* write the subbuffer to the tracefile */ | |
91dfef6e | 1513 | ret = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, subbuf_size, |
309167d2 | 1514 | padding, &index); |
91dfef6e DG |
1515 | /* |
1516 | * The mmap operation should write subbuf_size amount of data when | |
1517 | * network streaming or the full padding (len) size when we are _not_ | |
1518 | * streaming. | |
1519 | */ | |
d88aee68 DG |
1520 | if ((ret != subbuf_size && stream->net_seq_idx != (uint64_t) -1ULL) || |
1521 | (ret != len && stream->net_seq_idx == (uint64_t) -1ULL)) { | |
1d4dfdef | 1522 | /* |
91dfef6e | 1523 | * Display the error but continue processing to try to release the |
2336629e DG |
1524 | * subbuffer. This is a DBG statement since this is possible to |
1525 | * happen without being a critical error. | |
1d4dfdef | 1526 | */ |
2336629e | 1527 | DBG("Error writing to tracefile " |
91dfef6e DG |
1528 | "(ret: %zd != len: %lu != subbuf_size: %lu)", |
1529 | ret, len, subbuf_size); | |
309167d2 | 1530 | write_index = 0; |
1d4dfdef DG |
1531 | } |
1532 | break; | |
1533 | default: | |
1534 | ERR("Unknown output method"); | |
56591bac | 1535 | ret = -EPERM; |
d41f73b7 MD |
1536 | } |
1537 | ||
1538 | err = kernctl_put_next_subbuf(infd); | |
1539 | if (err != 0) { | |
32af2c95 | 1540 | if (err == -EFAULT) { |
5a510c9f | 1541 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1542 | } else if (err == -EIO) { |
d41f73b7 | 1543 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1544 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
d41f73b7 | 1545 | } |
32af2c95 | 1546 | ret = err; |
d41f73b7 MD |
1547 | goto end; |
1548 | } | |
1549 | ||
309167d2 | 1550 | /* Write index if needed. */ |
1c20f0e2 JD |
1551 | if (!write_index) { |
1552 | goto end; | |
1553 | } | |
1554 | ||
94d49140 JD |
1555 | if (stream->chan->live_timer_interval && !stream->metadata_flag) { |
1556 | /* | |
1557 | * In live, block until all the metadata is sent. | |
1558 | */ | |
c585821b MD |
1559 | pthread_mutex_lock(&stream->metadata_timer_lock); |
1560 | assert(!stream->missed_metadata_flush); | |
1561 | stream->waiting_on_metadata = true; | |
1562 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1563 | ||
94d49140 | 1564 | err = consumer_stream_sync_metadata(ctx, stream->session_id); |
c585821b MD |
1565 | |
1566 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
1567 | stream->waiting_on_metadata = false; | |
1568 | if (stream->missed_metadata_flush) { | |
1569 | stream->missed_metadata_flush = false; | |
1570 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1571 | (void) consumer_flush_kernel_index(stream); | |
1572 | } else { | |
1573 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1574 | } | |
94d49140 JD |
1575 | if (err < 0) { |
1576 | goto end; | |
1577 | } | |
1578 | } | |
1579 | ||
1c20f0e2 JD |
1580 | err = consumer_stream_write_index(stream, &index); |
1581 | if (err < 0) { | |
1582 | goto end; | |
309167d2 JD |
1583 | } |
1584 | ||
d41f73b7 MD |
1585 | end: |
1586 | return ret; | |
1587 | } | |
1588 | ||
1589 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1590 | { | |
1591 | int ret; | |
ffe60014 DG |
1592 | |
1593 | assert(stream); | |
1594 | ||
2bba9e53 DG |
1595 | /* |
1596 | * Don't create anything if this is set for streaming or should not be | |
1597 | * monitored. | |
1598 | */ | |
1599 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor) { | |
fe4477ee JD |
1600 | ret = utils_create_stream_file(stream->chan->pathname, stream->name, |
1601 | stream->chan->tracefile_size, stream->tracefile_count_current, | |
309167d2 | 1602 | stream->uid, stream->gid, NULL); |
fe4477ee JD |
1603 | if (ret < 0) { |
1604 | goto error; | |
1605 | } | |
1606 | stream->out_fd = ret; | |
1607 | stream->tracefile_size_current = 0; | |
309167d2 JD |
1608 | |
1609 | if (!stream->metadata_flag) { | |
f8f3885c MD |
1610 | struct lttng_index_file *index_file; |
1611 | ||
1612 | index_file = lttng_index_file_create(stream->chan->pathname, | |
309167d2 JD |
1613 | stream->name, stream->uid, stream->gid, |
1614 | stream->chan->tracefile_size, | |
f8f3885c MD |
1615 | stream->tracefile_count_current, |
1616 | CTF_INDEX_MAJOR, CTF_INDEX_MINOR); | |
1617 | if (!index_file) { | |
309167d2 JD |
1618 | goto error; |
1619 | } | |
1b47ae58 | 1620 | assert(!stream->index_file); |
f8f3885c | 1621 | stream->index_file = index_file; |
309167d2 | 1622 | } |
ffe60014 | 1623 | } |
d41f73b7 | 1624 | |
d41f73b7 MD |
1625 | if (stream->output == LTTNG_EVENT_MMAP) { |
1626 | /* get the len of the mmap region */ | |
1627 | unsigned long mmap_len; | |
1628 | ||
1629 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1630 | if (ret != 0) { | |
ffe60014 | 1631 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1632 | goto error_close_fd; |
1633 | } | |
1634 | stream->mmap_len = (size_t) mmap_len; | |
1635 | ||
ffe60014 DG |
1636 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1637 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1638 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1639 | PERROR("Error mmaping"); |
d41f73b7 MD |
1640 | ret = -1; |
1641 | goto error_close_fd; | |
1642 | } | |
1643 | } | |
1644 | ||
1645 | /* we return 0 to let the library handle the FD internally */ | |
1646 | return 0; | |
1647 | ||
1648 | error_close_fd: | |
2f225ce2 | 1649 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1650 | int err; |
1651 | ||
1652 | err = close(stream->out_fd); | |
1653 | assert(!err); | |
2f225ce2 | 1654 | stream->out_fd = -1; |
d41f73b7 MD |
1655 | } |
1656 | error: | |
1657 | return ret; | |
1658 | } | |
1659 | ||
ca22feea DG |
1660 | /* |
1661 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1662 | * stream. Consumer data lock MUST be acquired before calling this function |
1663 | * and the stream lock. | |
ca22feea | 1664 | * |
6d805429 | 1665 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1666 | * data is available for trace viewer reading. |
1667 | */ | |
6d805429 | 1668 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1669 | { |
1670 | int ret; | |
1671 | ||
1672 | assert(stream); | |
1673 | ||
873b9e9a MD |
1674 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1675 | ret = 0; | |
1676 | goto end; | |
1677 | } | |
1678 | ||
ca22feea DG |
1679 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1680 | if (ret == 0) { | |
1681 | /* There is still data so let's put back this subbuffer. */ | |
1682 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1683 | assert(ret == 0); | |
6d805429 | 1684 | ret = 1; /* Data is pending */ |
4e9a4686 | 1685 | goto end; |
ca22feea DG |
1686 | } |
1687 | ||
6d805429 DG |
1688 | /* Data is NOT pending and ready to be read. */ |
1689 | ret = 0; | |
ca22feea | 1690 | |
6efae65e DG |
1691 | end: |
1692 | return ret; | |
ca22feea | 1693 | } |