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> |
8d18bcae | 32 | #include <stdint.h> |
3bd1e081 | 33 | |
51a9e1c7 | 34 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 35 | #include <common/common.h> |
10a8a223 | 36 | #include <common/kernel-ctl/kernel-ctl.h> |
10a8a223 | 37 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 38 | #include <common/sessiond-comm/relayd.h> |
dbb5dfe6 | 39 | #include <common/compat/fcntl.h> |
f263b7fd | 40 | #include <common/compat/endian.h> |
acdb9057 | 41 | #include <common/pipe.h> |
00e2e675 | 42 | #include <common/relayd/relayd.h> |
fe4477ee | 43 | #include <common/utils.h> |
c8fea79c | 44 | #include <common/consumer/consumer-stream.h> |
309167d2 | 45 | #include <common/index/index.h> |
c8fea79c | 46 | #include <common/consumer/consumer-timer.h> |
e5148e25 | 47 | #include <common/optional.h> |
6f1177cf JG |
48 | #include <common/buffer-view.h> |
49 | #include <common/consumer/consumer.h> | |
8d18bcae | 50 | #include <common/consumer/metadata-bucket.h> |
0857097f | 51 | |
10a8a223 | 52 | #include "kernel-consumer.h" |
3bd1e081 MD |
53 | |
54 | extern struct lttng_consumer_global_data consumer_data; | |
55 | extern int consumer_poll_timeout; | |
3bd1e081 | 56 | |
3bd1e081 MD |
57 | /* |
58 | * Take a snapshot for a specific fd | |
59 | * | |
60 | * Returns 0 on success, < 0 on error | |
61 | */ | |
ffe60014 | 62 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
63 | { |
64 | int ret = 0; | |
65 | int infd = stream->wait_fd; | |
66 | ||
67 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
68 | /* |
69 | * -EAGAIN is not an error, it just means that there is no data to | |
70 | * be read. | |
71 | */ | |
72 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 73 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
74 | } |
75 | ||
76 | return ret; | |
77 | } | |
78 | ||
e9404c27 JG |
79 | /* |
80 | * Sample consumed and produced positions for a specific fd. | |
81 | * | |
82 | * Returns 0 on success, < 0 on error. | |
83 | */ | |
84 | int lttng_kconsumer_sample_snapshot_positions( | |
85 | struct lttng_consumer_stream *stream) | |
86 | { | |
87 | assert(stream); | |
88 | ||
89 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
90 | } | |
91 | ||
3bd1e081 MD |
92 | /* |
93 | * Get the produced position | |
94 | * | |
95 | * Returns 0 on success, < 0 on error | |
96 | */ | |
ffe60014 | 97 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
98 | unsigned long *pos) |
99 | { | |
100 | int ret; | |
101 | int infd = stream->wait_fd; | |
102 | ||
103 | ret = kernctl_snapshot_get_produced(infd, pos); | |
104 | if (ret != 0) { | |
5a510c9f | 105 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
106 | } |
107 | ||
108 | return ret; | |
109 | } | |
110 | ||
07b86b52 JD |
111 | /* |
112 | * Get the consumerd position | |
113 | * | |
114 | * Returns 0 on success, < 0 on error | |
115 | */ | |
116 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
117 | unsigned long *pos) | |
118 | { | |
119 | int ret; | |
120 | int infd = stream->wait_fd; | |
121 | ||
122 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
123 | if (ret != 0) { | |
5a510c9f | 124 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
125 | } |
126 | ||
127 | return ret; | |
128 | } | |
129 | ||
7775df52 JG |
130 | static |
131 | int get_current_subbuf_addr(struct lttng_consumer_stream *stream, | |
132 | const char **addr) | |
133 | { | |
134 | int ret; | |
135 | unsigned long mmap_offset; | |
136 | const char *mmap_base = stream->mmap_base; | |
137 | ||
138 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
139 | if (ret < 0) { | |
140 | PERROR("Failed to get mmap read offset"); | |
141 | goto error; | |
142 | } | |
143 | ||
144 | *addr = mmap_base + mmap_offset; | |
145 | error: | |
146 | return ret; | |
147 | } | |
148 | ||
07b86b52 JD |
149 | /* |
150 | * Take a snapshot of all the stream of a channel | |
b0226bd4 | 151 | * RCU read-side lock must be held across this function to ensure existence of |
e5148e25 | 152 | * channel. The channel lock must be held by the caller. |
07b86b52 JD |
153 | * |
154 | * Returns 0 on success, < 0 on error | |
155 | */ | |
f0f048c9 JG |
156 | static int lttng_kconsumer_snapshot_channel( |
157 | struct lttng_consumer_channel *channel, | |
158 | uint64_t key, char *path, uint64_t relayd_id, | |
159 | uint64_t nb_packets_per_stream, | |
5c786ded | 160 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
161 | { |
162 | int ret; | |
07b86b52 JD |
163 | struct lttng_consumer_stream *stream; |
164 | ||
6a00837f | 165 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 JD |
166 | |
167 | rcu_read_lock(); | |
168 | ||
07b86b52 JD |
169 | /* Splice is not supported yet for channel snapshot. */ |
170 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
7318a78f JG |
171 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
172 | channel->name); | |
07b86b52 JD |
173 | ret = -1; |
174 | goto end; | |
175 | } | |
176 | ||
10a50311 | 177 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 178 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
179 | |
180 | health_code_update(); | |
181 | ||
07b86b52 JD |
182 | /* |
183 | * Lock stream because we are about to change its state. | |
184 | */ | |
185 | pthread_mutex_lock(&stream->lock); | |
186 | ||
e5148e25 JG |
187 | assert(channel->trace_chunk); |
188 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { | |
189 | /* | |
190 | * Can't happen barring an internal error as the channel | |
191 | * holds a reference to the trace chunk. | |
192 | */ | |
193 | ERR("Failed to acquire reference to channel's trace chunk"); | |
194 | ret = -1; | |
195 | goto end_unlock; | |
196 | } | |
197 | assert(!stream->trace_chunk); | |
198 | stream->trace_chunk = channel->trace_chunk; | |
199 | ||
29decac3 DG |
200 | /* |
201 | * Assign the received relayd ID so we can use it for streaming. The streams | |
202 | * are not visible to anyone so this is OK to change it. | |
203 | */ | |
07b86b52 JD |
204 | stream->net_seq_idx = relayd_id; |
205 | channel->relayd_id = relayd_id; | |
206 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 207 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
208 | if (ret < 0) { |
209 | ERR("sending stream to relayd"); | |
210 | goto end_unlock; | |
211 | } | |
07b86b52 | 212 | } else { |
e5148e25 JG |
213 | ret = consumer_stream_create_output_files(stream, |
214 | false); | |
07b86b52 | 215 | if (ret < 0) { |
07b86b52 JD |
216 | goto end_unlock; |
217 | } | |
e5148e25 JG |
218 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
219 | stream->key); | |
07b86b52 JD |
220 | } |
221 | ||
f22dd891 | 222 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 223 | if (ret < 0) { |
f22dd891 MD |
224 | /* |
225 | * Doing a buffer flush which does not take into | |
226 | * account empty packets. This is not perfect | |
227 | * for stream intersection, but required as a | |
228 | * fall-back when "flush_empty" is not | |
229 | * implemented by lttng-modules. | |
230 | */ | |
231 | ret = kernctl_buffer_flush(stream->wait_fd); | |
232 | if (ret < 0) { | |
233 | ERR("Failed to flush kernel stream"); | |
234 | goto end_unlock; | |
235 | } | |
07b86b52 JD |
236 | goto end_unlock; |
237 | } | |
238 | ||
239 | ret = lttng_kconsumer_take_snapshot(stream); | |
240 | if (ret < 0) { | |
241 | ERR("Taking kernel snapshot"); | |
242 | goto end_unlock; | |
243 | } | |
244 | ||
245 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
246 | if (ret < 0) { | |
247 | ERR("Produced kernel snapshot position"); | |
248 | goto end_unlock; | |
249 | } | |
250 | ||
251 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
252 | if (ret < 0) { | |
253 | ERR("Consumerd kernel snapshot position"); | |
254 | goto end_unlock; | |
255 | } | |
256 | ||
d07ceecd MD |
257 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
258 | produced_pos, nb_packets_per_stream, | |
259 | stream->max_sb_size); | |
5c786ded | 260 | |
0fdaf1ed | 261 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
262 | ssize_t read_len; |
263 | unsigned long len, padded_len; | |
7775df52 | 264 | const char *subbuf_addr; |
b770aa7f | 265 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 266 | |
9ce5646a | 267 | health_code_update(); |
07b86b52 JD |
268 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
269 | ||
270 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
271 | if (ret < 0) { | |
32af2c95 | 272 | if (ret != -EAGAIN) { |
07b86b52 JD |
273 | PERROR("kernctl_get_subbuf snapshot"); |
274 | goto end_unlock; | |
275 | } | |
276 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
277 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 278 | stream->chan->lost_packets++; |
07b86b52 JD |
279 | continue; |
280 | } | |
281 | ||
282 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
283 | if (ret < 0) { | |
284 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 285 | goto error_put_subbuf; |
07b86b52 JD |
286 | } |
287 | ||
288 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
289 | if (ret < 0) { | |
290 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 291 | goto error_put_subbuf; |
07b86b52 JD |
292 | } |
293 | ||
7775df52 JG |
294 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
295 | if (ret) { | |
296 | goto error_put_subbuf; | |
297 | } | |
298 | ||
b770aa7f JG |
299 | subbuf_view = lttng_buffer_view_init( |
300 | subbuf_addr, 0, padded_len); | |
8d18bcae | 301 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
b770aa7f | 302 | stream, &subbuf_view, |
6f1177cf | 303 | padded_len - len); |
07b86b52 | 304 | /* |
29decac3 DG |
305 | * We write the padded len in local tracefiles but the data len |
306 | * when using a relay. Display the error but continue processing | |
307 | * to try to release the subbuffer. | |
07b86b52 JD |
308 | */ |
309 | if (relayd_id != (uint64_t) -1ULL) { | |
310 | if (read_len != len) { | |
311 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
312 | read_len, len); | |
313 | } | |
314 | } else { | |
315 | if (read_len != padded_len) { | |
316 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
317 | read_len, padded_len); | |
318 | } | |
319 | } | |
320 | ||
321 | ret = kernctl_put_subbuf(stream->wait_fd); | |
322 | if (ret < 0) { | |
323 | ERR("Snapshot kernctl_put_subbuf"); | |
324 | goto end_unlock; | |
325 | } | |
326 | consumed_pos += stream->max_sb_size; | |
327 | } | |
328 | ||
329 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
330 | if (stream->out_fd >= 0) { |
331 | ret = close(stream->out_fd); | |
332 | if (ret < 0) { | |
333 | PERROR("Kernel consumer snapshot close out_fd"); | |
334 | goto end_unlock; | |
335 | } | |
336 | stream->out_fd = -1; | |
07b86b52 | 337 | } |
07b86b52 JD |
338 | } else { |
339 | close_relayd_stream(stream); | |
340 | stream->net_seq_idx = (uint64_t) -1ULL; | |
341 | } | |
e5148e25 JG |
342 | lttng_trace_chunk_put(stream->trace_chunk); |
343 | stream->trace_chunk = NULL; | |
07b86b52 JD |
344 | pthread_mutex_unlock(&stream->lock); |
345 | } | |
346 | ||
347 | /* All good! */ | |
348 | ret = 0; | |
349 | goto end; | |
350 | ||
29decac3 DG |
351 | error_put_subbuf: |
352 | ret = kernctl_put_subbuf(stream->wait_fd); | |
353 | if (ret < 0) { | |
354 | ERR("Snapshot kernctl_put_subbuf error path"); | |
355 | } | |
07b86b52 JD |
356 | end_unlock: |
357 | pthread_mutex_unlock(&stream->lock); | |
358 | end: | |
359 | rcu_read_unlock(); | |
360 | return ret; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Read the whole metadata available for a snapshot. | |
b0226bd4 | 365 | * RCU read-side lock must be held across this function to ensure existence of |
e5148e25 | 366 | * metadata_channel. The channel lock must be held by the caller. |
07b86b52 JD |
367 | * |
368 | * Returns 0 on success, < 0 on error | |
369 | */ | |
e5148e25 JG |
370 | static int lttng_kconsumer_snapshot_metadata( |
371 | struct lttng_consumer_channel *metadata_channel, | |
b0226bd4 MD |
372 | uint64_t key, char *path, uint64_t relayd_id, |
373 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 374 | { |
d771f832 DG |
375 | int ret, use_relayd = 0; |
376 | ssize_t ret_read; | |
07b86b52 | 377 | struct lttng_consumer_stream *metadata_stream; |
d771f832 DG |
378 | |
379 | assert(ctx); | |
07b86b52 JD |
380 | |
381 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
382 | key, path); | |
383 | ||
384 | rcu_read_lock(); | |
385 | ||
07b86b52 JD |
386 | metadata_stream = metadata_channel->metadata_stream; |
387 | assert(metadata_stream); | |
e5148e25 | 388 | |
c55fe3e3 | 389 | pthread_mutex_lock(&metadata_stream->lock); |
e5148e25 JG |
390 | assert(metadata_channel->trace_chunk); |
391 | assert(metadata_stream->trace_chunk); | |
07b86b52 | 392 | |
d771f832 | 393 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 394 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
395 | use_relayd = 1; |
396 | } | |
397 | ||
398 | if (use_relayd) { | |
10a50311 | 399 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 400 | if (ret < 0) { |
c55fe3e3 | 401 | goto error_snapshot; |
e2039c7a | 402 | } |
e2039c7a | 403 | } else { |
e5148e25 JG |
404 | ret = consumer_stream_create_output_files(metadata_stream, |
405 | false); | |
e2039c7a | 406 | if (ret < 0) { |
c55fe3e3 | 407 | goto error_snapshot; |
e2039c7a | 408 | } |
07b86b52 | 409 | } |
07b86b52 | 410 | |
d771f832 | 411 | do { |
9ce5646a MD |
412 | health_code_update(); |
413 | ||
6f1177cf | 414 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 415 | if (ret_read < 0) { |
56591bac | 416 | if (ret_read != -EAGAIN) { |
6a00837f | 417 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
d771f832 | 418 | ret_read); |
c55fe3e3 JG |
419 | ret = ret_read; |
420 | goto error_snapshot; | |
07b86b52 | 421 | } |
d771f832 | 422 | /* ret_read is negative at this point so we will exit the loop. */ |
07b86b52 JD |
423 | continue; |
424 | } | |
d771f832 | 425 | } while (ret_read >= 0); |
07b86b52 | 426 | |
d771f832 DG |
427 | if (use_relayd) { |
428 | close_relayd_stream(metadata_stream); | |
429 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
430 | } else { | |
fdf9986c MD |
431 | if (metadata_stream->out_fd >= 0) { |
432 | ret = close(metadata_stream->out_fd); | |
433 | if (ret < 0) { | |
434 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
435 | /* | |
436 | * Don't go on error here since the snapshot was successful at this | |
437 | * point but somehow the close failed. | |
438 | */ | |
439 | } | |
440 | metadata_stream->out_fd = -1; | |
e5148e25 JG |
441 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
442 | metadata_stream->trace_chunk = NULL; | |
e2039c7a | 443 | } |
e2039c7a JD |
444 | } |
445 | ||
07b86b52 | 446 | ret = 0; |
c55fe3e3 JG |
447 | error_snapshot: |
448 | pthread_mutex_unlock(&metadata_stream->lock); | |
cf53a8a6 JD |
449 | cds_list_del(&metadata_stream->send_node); |
450 | consumer_stream_destroy(metadata_stream, NULL); | |
451 | metadata_channel->metadata_stream = NULL; | |
07b86b52 JD |
452 | rcu_read_unlock(); |
453 | return ret; | |
454 | } | |
455 | ||
1803a064 MD |
456 | /* |
457 | * Receive command from session daemon and process it. | |
458 | * | |
459 | * Return 1 on success else a negative value or 0. | |
460 | */ | |
3bd1e081 MD |
461 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
462 | int sock, struct pollfd *consumer_sockpoll) | |
463 | { | |
464 | ssize_t ret; | |
0c759fc9 | 465 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
466 | struct lttcomm_consumer_msg msg; |
467 | ||
9ce5646a MD |
468 | health_code_update(); |
469 | ||
3bd1e081 MD |
470 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
471 | if (ret != sizeof(msg)) { | |
1803a064 | 472 | if (ret > 0) { |
c6857fcf | 473 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
1803a064 MD |
474 | ret = -1; |
475 | } | |
3bd1e081 MD |
476 | return ret; |
477 | } | |
9ce5646a MD |
478 | |
479 | health_code_update(); | |
480 | ||
84382d49 MD |
481 | /* Deprecated command */ |
482 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 483 | |
9ce5646a MD |
484 | health_code_update(); |
485 | ||
b0b335c8 MD |
486 | /* relayd needs RCU read-side protection */ |
487 | rcu_read_lock(); | |
488 | ||
3bd1e081 | 489 | switch (msg.cmd_type) { |
00e2e675 DG |
490 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
491 | { | |
f50f23d9 | 492 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 493 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 494 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 | 495 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
2527bf85 | 496 | msg.u.relayd_sock.relayd_session_id); |
00e2e675 DG |
497 | goto end_nosignal; |
498 | } | |
3bd1e081 MD |
499 | case LTTNG_CONSUMER_ADD_CHANNEL: |
500 | { | |
501 | struct lttng_consumer_channel *new_channel; | |
e43c41c5 | 502 | int ret_recv; |
e5148e25 | 503 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 504 | |
9ce5646a MD |
505 | health_code_update(); |
506 | ||
f50f23d9 DG |
507 | /* First send a status message before receiving the fds. */ |
508 | ret = consumer_send_status_msg(sock, ret_code); | |
509 | if (ret < 0) { | |
510 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 511 | goto error_fatal; |
f50f23d9 | 512 | } |
9ce5646a MD |
513 | |
514 | health_code_update(); | |
515 | ||
d88aee68 | 516 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 517 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
e5148e25 JG |
518 | msg.u.channel.session_id, |
519 | msg.u.channel.chunk_id.is_set ? | |
520 | &chunk_id : NULL, | |
521 | msg.u.channel.pathname, | |
522 | msg.u.channel.name, | |
1624d5b7 JD |
523 | msg.u.channel.relayd_id, msg.u.channel.output, |
524 | msg.u.channel.tracefile_size, | |
1950109e | 525 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 526 | msg.u.channel.monitor, |
d7ba1388 | 527 | msg.u.channel.live_timer_interval, |
3ef395a9 | 528 | msg.u.channel.is_live, |
3d071855 | 529 | NULL, NULL); |
3bd1e081 | 530 | if (new_channel == NULL) { |
f73fabfd | 531 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
532 | goto end_nosignal; |
533 | } | |
ffe60014 | 534 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
535 | switch (msg.u.channel.output) { |
536 | case LTTNG_EVENT_SPLICE: | |
537 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
538 | break; | |
539 | case LTTNG_EVENT_MMAP: | |
540 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
541 | break; | |
542 | default: | |
543 | ERR("Channel output unknown %d", msg.u.channel.output); | |
544 | goto end_nosignal; | |
545 | } | |
ffe60014 DG |
546 | |
547 | /* Translate and save channel type. */ | |
548 | switch (msg.u.channel.type) { | |
549 | case CONSUMER_CHANNEL_TYPE_DATA: | |
550 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
551 | new_channel->type = msg.u.channel.type; | |
552 | break; | |
553 | default: | |
554 | assert(0); | |
555 | goto end_nosignal; | |
556 | }; | |
557 | ||
9ce5646a MD |
558 | health_code_update(); |
559 | ||
3bd1e081 | 560 | if (ctx->on_recv_channel != NULL) { |
e43c41c5 JD |
561 | ret_recv = ctx->on_recv_channel(new_channel); |
562 | if (ret_recv == 0) { | |
563 | ret = consumer_add_channel(new_channel, ctx); | |
564 | } else if (ret_recv < 0) { | |
3bd1e081 MD |
565 | goto end_nosignal; |
566 | } | |
567 | } else { | |
e43c41c5 | 568 | ret = consumer_add_channel(new_channel, ctx); |
3bd1e081 | 569 | } |
e9404c27 JG |
570 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && !ret) { |
571 | int monitor_start_ret; | |
572 | ||
573 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
574 | consumer_timer_live_start(new_channel, |
575 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
576 | monitor_start_ret = consumer_timer_monitor_start( |
577 | new_channel, | |
578 | msg.u.channel.monitor_timer_interval); | |
579 | if (monitor_start_ret < 0) { | |
580 | ERR("Starting channel monitoring timer failed"); | |
581 | goto end_nosignal; | |
582 | } | |
583 | ||
94d49140 | 584 | } |
e43c41c5 | 585 | |
9ce5646a MD |
586 | health_code_update(); |
587 | ||
e43c41c5 | 588 | /* If we received an error in add_channel, we need to report it. */ |
821fffb2 | 589 | if (ret < 0) { |
1803a064 MD |
590 | ret = consumer_send_status_msg(sock, ret); |
591 | if (ret < 0) { | |
592 | goto error_fatal; | |
593 | } | |
e43c41c5 JD |
594 | goto end_nosignal; |
595 | } | |
596 | ||
3bd1e081 MD |
597 | goto end_nosignal; |
598 | } | |
599 | case LTTNG_CONSUMER_ADD_STREAM: | |
600 | { | |
dae10966 DG |
601 | int fd; |
602 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 603 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 604 | struct lttng_consumer_channel *channel; |
c80048c6 | 605 | int alloc_ret = 0; |
3bd1e081 | 606 | |
ffe60014 DG |
607 | /* |
608 | * Get stream's channel reference. Needed when adding the stream to the | |
609 | * global hash table. | |
610 | */ | |
611 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
612 | if (!channel) { | |
613 | /* | |
614 | * We could not find the channel. Can happen if cpu hotplug | |
615 | * happens while tearing down. | |
616 | */ | |
d88aee68 | 617 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 618 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
619 | } |
620 | ||
9ce5646a MD |
621 | health_code_update(); |
622 | ||
f50f23d9 DG |
623 | /* First send a status message before receiving the fds. */ |
624 | ret = consumer_send_status_msg(sock, ret_code); | |
1803a064 | 625 | if (ret < 0) { |
d771f832 | 626 | /* Somehow, the session daemon is not responding anymore. */ |
e0e7757d | 627 | goto error_add_stream_fatal; |
1803a064 | 628 | } |
9ce5646a MD |
629 | |
630 | health_code_update(); | |
631 | ||
0c759fc9 | 632 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 633 | /* Channel was not found. */ |
e0e7757d | 634 | goto error_add_stream_nosignal; |
f50f23d9 DG |
635 | } |
636 | ||
d771f832 | 637 | /* Blocking call */ |
9ce5646a MD |
638 | health_poll_entry(); |
639 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
640 | health_poll_exit(); | |
84382d49 | 641 | if (ret) { |
e0e7757d | 642 | goto error_add_stream_fatal; |
3bd1e081 | 643 | } |
00e2e675 | 644 | |
9ce5646a MD |
645 | health_code_update(); |
646 | ||
00e2e675 | 647 | /* Get stream file descriptor from socket */ |
f2fc6720 MD |
648 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
649 | if (ret != sizeof(fd)) { | |
f73fabfd | 650 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
e0e7757d | 651 | goto end; |
3bd1e081 | 652 | } |
3bd1e081 | 653 | |
9ce5646a MD |
654 | health_code_update(); |
655 | ||
f50f23d9 DG |
656 | /* |
657 | * Send status code to session daemon only if the recv works. If the | |
658 | * above recv() failed, the session daemon is notified through the | |
659 | * error socket and the teardown is eventually done. | |
660 | */ | |
661 | ret = consumer_send_status_msg(sock, ret_code); | |
662 | if (ret < 0) { | |
663 | /* Somehow, the session daemon is not responding anymore. */ | |
e0e7757d | 664 | goto error_add_stream_nosignal; |
f50f23d9 DG |
665 | } |
666 | ||
9ce5646a MD |
667 | health_code_update(); |
668 | ||
e5148e25 | 669 | pthread_mutex_lock(&channel->lock); |
6f1177cf | 670 | new_stream = consumer_stream_create( |
c0c85e4f JG |
671 | channel, |
672 | channel->key, | |
ffe60014 | 673 | fd, |
ffe60014 | 674 | channel->name, |
ffe60014 DG |
675 | channel->relayd_id, |
676 | channel->session_id, | |
e5148e25 | 677 | channel->trace_chunk, |
ffe60014 DG |
678 | msg.u.stream.cpu, |
679 | &alloc_ret, | |
4891ece8 | 680 | channel->type, |
e5148e25 | 681 | channel->monitor); |
3bd1e081 | 682 | if (new_stream == NULL) { |
c80048c6 MD |
683 | switch (alloc_ret) { |
684 | case -ENOMEM: | |
685 | case -EINVAL: | |
686 | default: | |
687 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
688 | break; | |
c80048c6 | 689 | } |
e5148e25 | 690 | pthread_mutex_unlock(&channel->lock); |
e0e7757d | 691 | goto error_add_stream_nosignal; |
3bd1e081 | 692 | } |
d771f832 | 693 | |
ffe60014 | 694 | new_stream->wait_fd = fd; |
2c42aa5c JG |
695 | ret = kernctl_get_max_subbuf_size(new_stream->wait_fd, |
696 | &new_stream->max_sb_size); | |
697 | if (ret < 0) { | |
698 | pthread_mutex_unlock(&channel->lock); | |
699 | ERR("Failed to get kernel maximal subbuffer size"); | |
e0e7757d | 700 | goto error_add_stream_nosignal; |
2c42aa5c JG |
701 | } |
702 | ||
d9a2e16e JD |
703 | consumer_stream_update_channel_attributes(new_stream, |
704 | channel); | |
00e2e675 | 705 | |
a0c83db9 DG |
706 | /* |
707 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
708 | * refcount right now. We don't need to increment the refcount for |
709 | * streams in no monitor because we handle manually the cleanup of | |
710 | * those. It is very important to make sure there is NO prior | |
711 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 712 | */ |
07b86b52 JD |
713 | if (channel->monitor) { |
714 | uatomic_inc(&new_stream->chan->refcount); | |
715 | } | |
9d9353f9 | 716 | |
fb3a43a9 DG |
717 | /* |
718 | * The buffer flush is done on the session daemon side for the kernel | |
719 | * so no need for the stream "hangup_flush_done" variable to be | |
720 | * tracked. This is important for a kernel stream since we don't rely | |
721 | * on the flush state of the stream to read data. It's not the case for | |
722 | * user space tracing. | |
723 | */ | |
724 | new_stream->hangup_flush_done = 0; | |
725 | ||
9ce5646a MD |
726 | health_code_update(); |
727 | ||
e5148e25 | 728 | pthread_mutex_lock(&new_stream->lock); |
633d0084 DG |
729 | if (ctx->on_recv_stream) { |
730 | ret = ctx->on_recv_stream(new_stream); | |
731 | if (ret < 0) { | |
e5148e25 JG |
732 | pthread_mutex_unlock(&new_stream->lock); |
733 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 734 | consumer_stream_free(new_stream); |
e0e7757d | 735 | goto error_add_stream_nosignal; |
fb3a43a9 | 736 | } |
633d0084 | 737 | } |
9ce5646a MD |
738 | health_code_update(); |
739 | ||
07b86b52 JD |
740 | if (new_stream->metadata_flag) { |
741 | channel->metadata_stream = new_stream; | |
742 | } | |
743 | ||
2bba9e53 DG |
744 | /* Do not monitor this stream. */ |
745 | if (!channel->monitor) { | |
5eecee74 | 746 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 747 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 748 | new_stream->net_seq_idx); |
10a50311 | 749 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
e5148e25 JG |
750 | pthread_mutex_unlock(&new_stream->lock); |
751 | pthread_mutex_unlock(&channel->lock); | |
e0e7757d | 752 | goto end_add_stream; |
6dc3064a DG |
753 | } |
754 | ||
e1b71bdc DG |
755 | /* Send stream to relayd if the stream has an ID. */ |
756 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
194ee077 DG |
757 | ret = consumer_send_relayd_stream(new_stream, |
758 | new_stream->chan->pathname); | |
e1b71bdc | 759 | if (ret < 0) { |
e5148e25 JG |
760 | pthread_mutex_unlock(&new_stream->lock); |
761 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 762 | consumer_stream_free(new_stream); |
e0e7757d | 763 | goto error_add_stream_nosignal; |
e1b71bdc | 764 | } |
001b7e62 MD |
765 | |
766 | /* | |
767 | * If adding an extra stream to an already | |
768 | * existing channel (e.g. cpu hotplug), we need | |
769 | * to send the "streams_sent" command to relayd. | |
770 | */ | |
771 | if (channel->streams_sent_to_relayd) { | |
772 | ret = consumer_send_relayd_streams_sent( | |
773 | new_stream->net_seq_idx); | |
774 | if (ret < 0) { | |
e5148e25 JG |
775 | pthread_mutex_unlock(&new_stream->lock); |
776 | pthread_mutex_unlock(&channel->lock); | |
e0e7757d | 777 | goto error_add_stream_nosignal; |
001b7e62 MD |
778 | } |
779 | } | |
e2039c7a | 780 | } |
e5148e25 JG |
781 | pthread_mutex_unlock(&new_stream->lock); |
782 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 783 | |
50f8ae69 | 784 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 785 | if (new_stream->metadata_flag) { |
66d583dc | 786 | consumer_add_metadata_stream(new_stream); |
dae10966 | 787 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 788 | } else { |
66d583dc | 789 | consumer_add_data_stream(new_stream); |
dae10966 | 790 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
791 | } |
792 | ||
66d583dc | 793 | /* Visible to other threads */ |
5ab66908 MD |
794 | new_stream->globally_visible = 1; |
795 | ||
9ce5646a MD |
796 | health_code_update(); |
797 | ||
dae10966 | 798 | ret = lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream)); |
50f8ae69 | 799 | if (ret < 0) { |
dae10966 | 800 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 801 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 802 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
803 | if (new_stream->metadata_flag) { |
804 | consumer_del_stream_for_metadata(new_stream); | |
805 | } else { | |
806 | consumer_del_stream_for_data(new_stream); | |
807 | } | |
e0e7757d | 808 | goto error_add_stream_nosignal; |
3bd1e081 | 809 | } |
00e2e675 | 810 | |
02d02e31 JD |
811 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
812 | new_stream->name, fd, new_stream->chan->pathname, new_stream->relayd_stream_id); | |
e0e7757d | 813 | end_add_stream: |
3bd1e081 | 814 | break; |
e0e7757d JG |
815 | error_add_stream_nosignal: |
816 | goto end_nosignal; | |
817 | error_add_stream_fatal: | |
818 | goto error_fatal; | |
3bd1e081 | 819 | } |
a4baae1b JD |
820 | case LTTNG_CONSUMER_STREAMS_SENT: |
821 | { | |
822 | struct lttng_consumer_channel *channel; | |
823 | ||
824 | /* | |
825 | * Get stream's channel reference. Needed when adding the stream to the | |
826 | * global hash table. | |
827 | */ | |
828 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
829 | if (!channel) { | |
830 | /* | |
831 | * We could not find the channel. Can happen if cpu hotplug | |
832 | * happens while tearing down. | |
833 | */ | |
834 | ERR("Unable to find channel key %" PRIu64, | |
835 | msg.u.sent_streams.channel_key); | |
e462382a | 836 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
837 | } |
838 | ||
839 | health_code_update(); | |
840 | ||
841 | /* | |
842 | * Send status code to session daemon. | |
843 | */ | |
844 | ret = consumer_send_status_msg(sock, ret_code); | |
f261ad0a | 845 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
a4baae1b | 846 | /* Somehow, the session daemon is not responding anymore. */ |
6ec577e9 | 847 | goto error_streams_sent_nosignal; |
a4baae1b JD |
848 | } |
849 | ||
850 | health_code_update(); | |
851 | ||
852 | /* | |
853 | * We should not send this message if we don't monitor the | |
854 | * streams in this channel. | |
855 | */ | |
856 | if (!channel->monitor) { | |
6ec577e9 | 857 | goto end_error_streams_sent; |
a4baae1b JD |
858 | } |
859 | ||
860 | health_code_update(); | |
861 | /* Send stream to relayd if the stream has an ID. */ | |
862 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
863 | ret = consumer_send_relayd_streams_sent( | |
864 | msg.u.sent_streams.net_seq_idx); | |
865 | if (ret < 0) { | |
6ec577e9 | 866 | goto error_streams_sent_nosignal; |
a4baae1b | 867 | } |
001b7e62 | 868 | channel->streams_sent_to_relayd = true; |
a4baae1b | 869 | } |
6ec577e9 | 870 | end_error_streams_sent: |
a4baae1b | 871 | break; |
6ec577e9 JG |
872 | error_streams_sent_nosignal: |
873 | goto end_nosignal; | |
a4baae1b | 874 | } |
3bd1e081 MD |
875 | case LTTNG_CONSUMER_UPDATE_STREAM: |
876 | { | |
3f8e211f DG |
877 | rcu_read_unlock(); |
878 | return -ENOSYS; | |
879 | } | |
880 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
881 | { | |
a6ba4fe1 | 882 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f DG |
883 | struct consumer_relayd_sock_pair *relayd; |
884 | ||
a6ba4fe1 | 885 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
886 | |
887 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 888 | relayd = consumer_find_relayd(index); |
3f8e211f | 889 | if (relayd == NULL) { |
3448e266 | 890 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 891 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 892 | } |
3f8e211f | 893 | |
a6ba4fe1 DG |
894 | /* |
895 | * Each relayd socket pair has a refcount of stream attached to it | |
896 | * which tells if the relayd is still active or not depending on the | |
897 | * refcount value. | |
898 | * | |
899 | * This will set the destroy flag of the relayd object and destroy it | |
900 | * if the refcount reaches zero when called. | |
901 | * | |
902 | * The destroy can happen either here or when a stream fd hangs up. | |
903 | */ | |
f50f23d9 DG |
904 | if (relayd) { |
905 | consumer_flag_relayd_for_destroy(relayd); | |
906 | } | |
907 | ||
9ce5646a MD |
908 | health_code_update(); |
909 | ||
f50f23d9 DG |
910 | ret = consumer_send_status_msg(sock, ret_code); |
911 | if (ret < 0) { | |
912 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 913 | goto error_fatal; |
f50f23d9 | 914 | } |
3f8e211f | 915 | |
3f8e211f | 916 | goto end_nosignal; |
3bd1e081 | 917 | } |
6d805429 | 918 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 919 | { |
c8f59ee5 | 920 | int32_t ret; |
6d805429 | 921 | uint64_t id = msg.u.data_pending.session_id; |
c8f59ee5 | 922 | |
6d805429 | 923 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 924 | |
6d805429 | 925 | ret = consumer_data_pending(id); |
c8f59ee5 | 926 | |
9ce5646a MD |
927 | health_code_update(); |
928 | ||
c8f59ee5 DG |
929 | /* Send back returned value to session daemon */ |
930 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
931 | if (ret < 0) { | |
6d805429 | 932 | PERROR("send data pending ret code"); |
1803a064 | 933 | goto error_fatal; |
c8f59ee5 | 934 | } |
f50f23d9 DG |
935 | |
936 | /* | |
937 | * No need to send back a status message since the data pending | |
938 | * returned value is the response. | |
939 | */ | |
c8f59ee5 | 940 | break; |
53632229 | 941 | } |
6dc3064a DG |
942 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
943 | { | |
b0226bd4 MD |
944 | struct lttng_consumer_channel *channel; |
945 | uint64_t key = msg.u.snapshot_channel.key; | |
946 | ||
947 | channel = consumer_find_channel(key); | |
948 | if (!channel) { | |
949 | ERR("Channel %" PRIu64 " not found", key); | |
950 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 951 | } else { |
e5148e25 | 952 | pthread_mutex_lock(&channel->lock); |
b0226bd4 MD |
953 | if (msg.u.snapshot_channel.metadata == 1) { |
954 | ret = lttng_kconsumer_snapshot_metadata(channel, key, | |
955 | msg.u.snapshot_channel.pathname, | |
956 | msg.u.snapshot_channel.relayd_id, ctx); | |
957 | if (ret < 0) { | |
958 | ERR("Snapshot metadata failed"); | |
959 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
960 | } | |
961 | } else { | |
962 | ret = lttng_kconsumer_snapshot_channel(channel, key, | |
963 | msg.u.snapshot_channel.pathname, | |
964 | msg.u.snapshot_channel.relayd_id, | |
965 | msg.u.snapshot_channel.nb_packets_per_stream, | |
966 | ctx); | |
967 | if (ret < 0) { | |
968 | ERR("Snapshot channel failed"); | |
969 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
970 | } | |
07b86b52 | 971 | } |
e5148e25 | 972 | pthread_mutex_unlock(&channel->lock); |
07b86b52 | 973 | } |
9ce5646a MD |
974 | health_code_update(); |
975 | ||
6dc3064a DG |
976 | ret = consumer_send_status_msg(sock, ret_code); |
977 | if (ret < 0) { | |
978 | /* Somehow, the session daemon is not responding anymore. */ | |
979 | goto end_nosignal; | |
980 | } | |
981 | break; | |
982 | } | |
07b86b52 JD |
983 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
984 | { | |
985 | uint64_t key = msg.u.destroy_channel.key; | |
986 | struct lttng_consumer_channel *channel; | |
987 | ||
988 | channel = consumer_find_channel(key); | |
989 | if (!channel) { | |
990 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 991 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
992 | } |
993 | ||
9ce5646a MD |
994 | health_code_update(); |
995 | ||
07b86b52 JD |
996 | ret = consumer_send_status_msg(sock, ret_code); |
997 | if (ret < 0) { | |
998 | /* Somehow, the session daemon is not responding anymore. */ | |
09d3dbc0 | 999 | goto end_destroy_channel; |
07b86b52 JD |
1000 | } |
1001 | ||
9ce5646a MD |
1002 | health_code_update(); |
1003 | ||
15dc512a DG |
1004 | /* Stop right now if no channel was found. */ |
1005 | if (!channel) { | |
09d3dbc0 | 1006 | goto end_destroy_channel; |
15dc512a DG |
1007 | } |
1008 | ||
07b86b52 JD |
1009 | /* |
1010 | * This command should ONLY be issued for channel with streams set in | |
1011 | * no monitor mode. | |
1012 | */ | |
1013 | assert(!channel->monitor); | |
1014 | ||
1015 | /* | |
1016 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1017 | * monitor mode. | |
1018 | */ | |
1019 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
1020 | ||
1021 | consumer_del_channel(channel); | |
09d3dbc0 | 1022 | end_destroy_channel: |
07b86b52 JD |
1023 | goto end_nosignal; |
1024 | } | |
fb83fe64 JD |
1025 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1026 | { | |
66ab32be JD |
1027 | ssize_t ret; |
1028 | uint64_t count; | |
fb83fe64 JD |
1029 | struct lttng_consumer_channel *channel; |
1030 | uint64_t id = msg.u.discarded_events.session_id; | |
1031 | uint64_t key = msg.u.discarded_events.channel_key; | |
1032 | ||
e5742757 MD |
1033 | DBG("Kernel consumer discarded events command for session id %" |
1034 | PRIu64 ", channel key %" PRIu64, id, key); | |
1035 | ||
fb83fe64 JD |
1036 | channel = consumer_find_channel(key); |
1037 | if (!channel) { | |
1038 | ERR("Kernel consumer discarded events channel %" | |
1039 | PRIu64 " not found", key); | |
66ab32be | 1040 | count = 0; |
e5742757 | 1041 | } else { |
66ab32be | 1042 | count = channel->discarded_events; |
fb83fe64 JD |
1043 | } |
1044 | ||
fb83fe64 JD |
1045 | health_code_update(); |
1046 | ||
1047 | /* Send back returned value to session daemon */ | |
66ab32be | 1048 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1049 | if (ret < 0) { |
1050 | PERROR("send discarded events"); | |
1051 | goto error_fatal; | |
1052 | } | |
1053 | ||
1054 | break; | |
1055 | } | |
1056 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1057 | { | |
66ab32be JD |
1058 | ssize_t ret; |
1059 | uint64_t count; | |
fb83fe64 JD |
1060 | struct lttng_consumer_channel *channel; |
1061 | uint64_t id = msg.u.lost_packets.session_id; | |
1062 | uint64_t key = msg.u.lost_packets.channel_key; | |
1063 | ||
e5742757 MD |
1064 | DBG("Kernel consumer lost packets command for session id %" |
1065 | PRIu64 ", channel key %" PRIu64, id, key); | |
1066 | ||
fb83fe64 JD |
1067 | channel = consumer_find_channel(key); |
1068 | if (!channel) { | |
1069 | ERR("Kernel consumer lost packets channel %" | |
1070 | PRIu64 " not found", key); | |
66ab32be | 1071 | count = 0; |
e5742757 | 1072 | } else { |
66ab32be | 1073 | count = channel->lost_packets; |
fb83fe64 JD |
1074 | } |
1075 | ||
fb83fe64 JD |
1076 | health_code_update(); |
1077 | ||
1078 | /* Send back returned value to session daemon */ | |
66ab32be | 1079 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1080 | if (ret < 0) { |
1081 | PERROR("send lost packets"); | |
1082 | goto error_fatal; | |
1083 | } | |
1084 | ||
1085 | break; | |
1086 | } | |
b3530820 JG |
1087 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1088 | { | |
1089 | int channel_monitor_pipe; | |
1090 | ||
1091 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1092 | /* Successfully received the command's type. */ | |
1093 | ret = consumer_send_status_msg(sock, ret_code); | |
1094 | if (ret < 0) { | |
1095 | goto error_fatal; | |
1096 | } | |
1097 | ||
1098 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, | |
1099 | 1); | |
1100 | if (ret != sizeof(channel_monitor_pipe)) { | |
1101 | ERR("Failed to receive channel monitor pipe"); | |
1102 | goto error_fatal; | |
1103 | } | |
1104 | ||
1105 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
1106 | ret = consumer_timer_thread_set_channel_monitor_pipe( | |
1107 | channel_monitor_pipe); | |
1108 | if (!ret) { | |
1109 | int flags; | |
1110 | ||
1111 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1112 | /* Set the pipe as non-blocking. */ | |
1113 | ret = fcntl(channel_monitor_pipe, F_GETFL, 0); | |
1114 | if (ret == -1) { | |
1115 | PERROR("fcntl get flags of the channel monitoring pipe"); | |
1116 | goto error_fatal; | |
1117 | } | |
1118 | flags = ret; | |
1119 | ||
1120 | ret = fcntl(channel_monitor_pipe, F_SETFL, | |
1121 | flags | O_NONBLOCK); | |
1122 | if (ret == -1) { | |
1123 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); | |
1124 | goto error_fatal; | |
1125 | } | |
1126 | DBG("Channel monitor pipe set as non-blocking"); | |
1127 | } else { | |
1128 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1129 | } | |
1130 | ret = consumer_send_status_msg(sock, ret_code); | |
1131 | if (ret < 0) { | |
1132 | goto error_fatal; | |
1133 | } | |
1134 | break; | |
1135 | } | |
b99a8d42 JD |
1136 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1137 | { | |
e96d66b4 MD |
1138 | struct lttng_consumer_channel *channel; |
1139 | uint64_t key = msg.u.rotate_channel.key; | |
b99a8d42 | 1140 | |
e96d66b4 | 1141 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1142 | |
e96d66b4 MD |
1143 | channel = consumer_find_channel(key); |
1144 | if (!channel) { | |
1145 | ERR("Channel %" PRIu64 " not found", key); | |
1146 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1147 | } else { | |
1148 | /* | |
1149 | * Sample the rotate position of all the streams in this channel. | |
1150 | */ | |
1151 | ret = lttng_consumer_rotate_channel(channel, key, | |
e96d66b4 MD |
1152 | msg.u.rotate_channel.relayd_id, |
1153 | msg.u.rotate_channel.metadata, | |
e96d66b4 MD |
1154 | ctx); |
1155 | if (ret < 0) { | |
1156 | ERR("Rotate channel failed"); | |
1157 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1158 | } | |
b99a8d42 | 1159 | |
e96d66b4 MD |
1160 | health_code_update(); |
1161 | } | |
b99a8d42 JD |
1162 | ret = consumer_send_status_msg(sock, ret_code); |
1163 | if (ret < 0) { | |
1164 | /* Somehow, the session daemon is not responding anymore. */ | |
812e4d26 | 1165 | goto error_rotate_channel; |
b99a8d42 | 1166 | } |
e96d66b4 MD |
1167 | if (channel) { |
1168 | /* Rotate the streams that are ready right now. */ | |
1169 | ret = lttng_consumer_rotate_ready_streams( | |
1170 | channel, key, ctx); | |
1171 | if (ret < 0) { | |
1172 | ERR("Rotate ready streams failed"); | |
1173 | } | |
b99a8d42 | 1174 | } |
b99a8d42 | 1175 | break; |
812e4d26 JG |
1176 | error_rotate_channel: |
1177 | goto end_nosignal; | |
b99a8d42 | 1178 | } |
e5148e25 | 1179 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1180 | { |
e5148e25 JG |
1181 | ret_code = lttng_consumer_init_command(ctx, |
1182 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1183 | health_code_update(); |
00fb02ac JD |
1184 | ret = consumer_send_status_msg(sock, ret_code); |
1185 | if (ret < 0) { | |
1186 | /* Somehow, the session daemon is not responding anymore. */ | |
1187 | goto end_nosignal; | |
1188 | } | |
1189 | break; | |
1190 | } | |
e5148e25 | 1191 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1192 | { |
e5148e25 | 1193 | const struct lttng_credentials credentials = { |
0ebdafe0 JG |
1194 | .uid = msg.u.create_trace_chunk.credentials.value.uid, |
1195 | .gid = msg.u.create_trace_chunk.credentials.value.gid, | |
e5148e25 JG |
1196 | }; |
1197 | const bool is_local_trace = | |
1198 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1199 | const uint64_t relayd_id = | |
1200 | msg.u.create_trace_chunk.relayd_id.value; | |
1201 | const char *chunk_override_name = | |
1202 | *msg.u.create_trace_chunk.override_name ? | |
1203 | msg.u.create_trace_chunk.override_name : | |
1204 | NULL; | |
1205 | LTTNG_OPTIONAL(struct lttng_directory_handle) chunk_directory_handle = | |
1206 | LTTNG_OPTIONAL_INIT; | |
d88744a4 | 1207 | |
e5148e25 JG |
1208 | /* |
1209 | * The session daemon will only provide a chunk directory file | |
1210 | * descriptor for local traces. | |
1211 | */ | |
1212 | if (is_local_trace) { | |
1213 | int chunk_dirfd; | |
19990ed5 | 1214 | |
e5148e25 JG |
1215 | /* Acnowledge the reception of the command. */ |
1216 | ret = consumer_send_status_msg(sock, | |
1217 | LTTCOMM_CONSUMERD_SUCCESS); | |
1218 | if (ret < 0) { | |
1219 | /* Somehow, the session daemon is not responding anymore. */ | |
1220 | goto end_nosignal; | |
1221 | } | |
82528808 | 1222 | |
e5148e25 JG |
1223 | ret = lttcomm_recv_fds_unix_sock(sock, &chunk_dirfd, 1); |
1224 | if (ret != sizeof(chunk_dirfd)) { | |
1225 | ERR("Failed to receive trace chunk directory file descriptor"); | |
1226 | goto error_fatal; | |
1227 | } | |
82528808 | 1228 | |
e5148e25 JG |
1229 | DBG("Received trace chunk directory fd (%d)", |
1230 | chunk_dirfd); | |
1231 | ret = lttng_directory_handle_init_from_dirfd( | |
1232 | &chunk_directory_handle.value, | |
1233 | chunk_dirfd); | |
1234 | if (ret) { | |
1235 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); | |
1236 | if (close(chunk_dirfd)) { | |
1237 | PERROR("Failed to close chunk directory file descriptor"); | |
1238 | } | |
1239 | goto error_fatal; | |
1240 | } | |
1241 | chunk_directory_handle.is_set = true; | |
82528808 JG |
1242 | } |
1243 | ||
e5148e25 JG |
1244 | ret_code = lttng_consumer_create_trace_chunk( |
1245 | !is_local_trace ? &relayd_id : NULL, | |
1246 | msg.u.create_trace_chunk.session_id, | |
1247 | msg.u.create_trace_chunk.chunk_id, | |
0ebdafe0 JG |
1248 | (time_t) msg.u.create_trace_chunk |
1249 | .creation_timestamp, | |
e5148e25 | 1250 | chunk_override_name, |
0ebdafe0 JG |
1251 | msg.u.create_trace_chunk.credentials.is_set ? |
1252 | &credentials : | |
1253 | NULL, | |
e5148e25 JG |
1254 | chunk_directory_handle.is_set ? |
1255 | &chunk_directory_handle.value : | |
1256 | NULL); | |
82528808 | 1257 | |
e5148e25 JG |
1258 | if (chunk_directory_handle.is_set) { |
1259 | lttng_directory_handle_fini( | |
1260 | &chunk_directory_handle.value); | |
d88744a4 | 1261 | } |
e5148e25 | 1262 | goto end_msg_sessiond; |
d88744a4 | 1263 | } |
e5148e25 | 1264 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1265 | { |
6bbcff33 JG |
1266 | enum lttng_trace_chunk_command_type close_command = |
1267 | msg.u.close_trace_chunk.close_command.value; | |
e5148e25 JG |
1268 | const uint64_t relayd_id = |
1269 | msg.u.close_trace_chunk.relayd_id.value; | |
41b23598 MD |
1270 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1271 | char path[LTTNG_PATH_MAX]; | |
e5148e25 JG |
1272 | |
1273 | ret_code = lttng_consumer_close_trace_chunk( | |
1274 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
6bbcff33 JG |
1275 | &relayd_id : |
1276 | NULL, | |
e5148e25 JG |
1277 | msg.u.close_trace_chunk.session_id, |
1278 | msg.u.close_trace_chunk.chunk_id, | |
6bbcff33 JG |
1279 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1280 | msg.u.close_trace_chunk.close_command.is_set ? | |
1281 | &close_command : | |
41b23598 MD |
1282 | NULL, path); |
1283 | reply.ret_code = ret_code; | |
1284 | reply.path_length = strlen(path) + 1; | |
1285 | ret = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1286 | if (ret != sizeof(reply)) { | |
1287 | goto error_fatal; | |
1288 | } | |
1289 | ret = lttcomm_send_unix_sock(sock, path, reply.path_length); | |
1290 | if (ret != reply.path_length) { | |
1291 | goto error_fatal; | |
1292 | } | |
1293 | goto end_nosignal; | |
fc181d72 | 1294 | } |
e5148e25 | 1295 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
fc181d72 | 1296 | { |
e5148e25 JG |
1297 | const uint64_t relayd_id = |
1298 | msg.u.trace_chunk_exists.relayd_id.value; | |
1299 | ||
1300 | ret_code = lttng_consumer_trace_chunk_exists( | |
1301 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1302 | &relayd_id : NULL, | |
1303 | msg.u.trace_chunk_exists.session_id, | |
1304 | msg.u.trace_chunk_exists.chunk_id); | |
1305 | goto end_msg_sessiond; | |
a1ae2ea5 | 1306 | } |
3bd1e081 | 1307 | default: |
3f8e211f | 1308 | goto end_nosignal; |
3bd1e081 | 1309 | } |
3f8e211f | 1310 | |
3bd1e081 | 1311 | end_nosignal: |
4cbc1a04 DG |
1312 | /* |
1313 | * Return 1 to indicate success since the 0 value can be a socket | |
1314 | * shutdown during the recv() or send() call. | |
1315 | */ | |
e0e7757d JG |
1316 | ret = 1; |
1317 | goto end; | |
1318 | error_fatal: | |
1319 | /* This will issue a consumer stop. */ | |
1320 | ret = -1; | |
1321 | goto end; | |
e5148e25 JG |
1322 | end_msg_sessiond: |
1323 | /* | |
1324 | * The returned value here is not useful since either way we'll return 1 to | |
1325 | * the caller because the session daemon socket management is done | |
1326 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1327 | */ | |
1328 | ret = consumer_send_status_msg(sock, ret_code); | |
1329 | if (ret < 0) { | |
1330 | goto error_fatal; | |
1331 | } | |
e0e7757d JG |
1332 | ret = 1; |
1333 | end: | |
e5148e25 | 1334 | health_code_update(); |
1803a064 | 1335 | rcu_read_unlock(); |
e0e7757d | 1336 | return ret; |
3bd1e081 | 1337 | } |
d41f73b7 | 1338 | |
94d49140 JD |
1339 | /* |
1340 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1341 | * metadata thread can consumer them. | |
1342 | * | |
1343 | * Metadata stream lock MUST be acquired. | |
94d49140 | 1344 | */ |
27e2fa5d JG |
1345 | enum sync_metadata_status lttng_kconsumer_sync_metadata( |
1346 | struct lttng_consumer_stream *metadata) | |
94d49140 JD |
1347 | { |
1348 | int ret; | |
27e2fa5d | 1349 | enum sync_metadata_status status; |
94d49140 JD |
1350 | |
1351 | assert(metadata); | |
1352 | ||
1353 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1354 | if (ret < 0) { | |
1355 | ERR("Failed to flush kernel stream"); | |
27e2fa5d | 1356 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
1357 | goto end; |
1358 | } | |
1359 | ||
1360 | ret = kernctl_snapshot(metadata->wait_fd); | |
1361 | if (ret < 0) { | |
27e2fa5d JG |
1362 | if (errno == EAGAIN) { |
1363 | /* No new metadata, exit. */ | |
1364 | DBG("Sync metadata, no new kernel metadata"); | |
1365 | status = SYNC_METADATA_STATUS_NO_DATA; | |
1366 | } else { | |
94d49140 | 1367 | ERR("Sync metadata, taking kernel snapshot failed."); |
27e2fa5d | 1368 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 | 1369 | } |
27e2fa5d JG |
1370 | } else { |
1371 | status = SYNC_METADATA_STATUS_NEW_DATA; | |
94d49140 JD |
1372 | } |
1373 | ||
1374 | end: | |
27e2fa5d | 1375 | return status; |
94d49140 | 1376 | } |
309167d2 | 1377 | |
fb83fe64 | 1378 | static |
6f1177cf JG |
1379 | int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1380 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1381 | { |
1382 | int ret; | |
fb83fe64 | 1383 | |
6f1177cf JG |
1384 | ret = kernctl_get_subbuf_size( |
1385 | stream->wait_fd, &subbuf->info.data.subbuf_size); | |
1386 | if (ret) { | |
fb83fe64 JD |
1387 | goto end; |
1388 | } | |
fb83fe64 | 1389 | |
6f1177cf JG |
1390 | ret = kernctl_get_padded_subbuf_size( |
1391 | stream->wait_fd, &subbuf->info.data.padded_subbuf_size); | |
1392 | if (ret) { | |
fb83fe64 JD |
1393 | goto end; |
1394 | } | |
fb83fe64 JD |
1395 | |
1396 | end: | |
1397 | return ret; | |
1398 | } | |
1399 | ||
93ec662e | 1400 | static |
6f1177cf JG |
1401 | int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1402 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1403 | { |
1404 | int ret; | |
93ec662e | 1405 | |
6f1177cf JG |
1406 | ret = extract_common_subbuffer_info(stream, subbuf); |
1407 | if (ret) { | |
93ec662e JD |
1408 | goto end; |
1409 | } | |
1410 | ||
6f1177cf JG |
1411 | ret = kernctl_get_metadata_version( |
1412 | stream->wait_fd, &subbuf->info.metadata.version); | |
1413 | if (ret) { | |
93ec662e JD |
1414 | goto end; |
1415 | } | |
1416 | ||
93ec662e JD |
1417 | end: |
1418 | return ret; | |
1419 | } | |
1420 | ||
6f1177cf JG |
1421 | static |
1422 | int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, | |
1423 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1424 | { |
6f1177cf | 1425 | int ret; |
d41f73b7 | 1426 | |
6f1177cf JG |
1427 | ret = extract_common_subbuffer_info(stream, subbuf); |
1428 | if (ret) { | |
1429 | goto end; | |
1430 | } | |
309167d2 | 1431 | |
6f1177cf JG |
1432 | ret = kernctl_get_packet_size( |
1433 | stream->wait_fd, &subbuf->info.data.packet_size); | |
1434 | if (ret < 0) { | |
1435 | PERROR("Failed to get sub-buffer packet size"); | |
1436 | goto end; | |
1437 | } | |
02d02e31 | 1438 | |
6f1177cf JG |
1439 | ret = kernctl_get_content_size( |
1440 | stream->wait_fd, &subbuf->info.data.content_size); | |
1441 | if (ret < 0) { | |
1442 | PERROR("Failed to get sub-buffer content size"); | |
1443 | goto end; | |
d41f73b7 MD |
1444 | } |
1445 | ||
6f1177cf JG |
1446 | ret = kernctl_get_timestamp_begin( |
1447 | stream->wait_fd, &subbuf->info.data.timestamp_begin); | |
1448 | if (ret < 0) { | |
1449 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1450 | goto end; | |
1d4dfdef DG |
1451 | } |
1452 | ||
6f1177cf JG |
1453 | ret = kernctl_get_timestamp_end( |
1454 | stream->wait_fd, &subbuf->info.data.timestamp_end); | |
1455 | if (ret < 0) { | |
1456 | PERROR("Failed to get sub-buffer end timestamp"); | |
1457 | goto end; | |
1458 | } | |
1459 | ||
1460 | ret = kernctl_get_events_discarded( | |
1461 | stream->wait_fd, &subbuf->info.data.events_discarded); | |
1462 | if (ret) { | |
1463 | PERROR("Failed to get sub-buffer events discarded count"); | |
1464 | goto end; | |
1465 | } | |
1466 | ||
1467 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
1468 | &subbuf->info.data.sequence_number.value); | |
1469 | if (ret) { | |
1470 | /* May not be supported by older LTTng-modules. */ | |
1471 | if (ret != -ENOTTY) { | |
1472 | PERROR("Failed to get sub-buffer sequence number"); | |
1473 | goto end; | |
fb83fe64 | 1474 | } |
1c20f0e2 | 1475 | } else { |
6f1177cf | 1476 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1477 | } |
1478 | ||
6f1177cf JG |
1479 | ret = kernctl_get_stream_id( |
1480 | stream->wait_fd, &subbuf->info.data.stream_id); | |
1481 | if (ret < 0) { | |
1482 | PERROR("Failed to get stream id"); | |
1483 | goto end; | |
1484 | } | |
1d4dfdef | 1485 | |
6f1177cf JG |
1486 | ret = kernctl_get_instance_id(stream->wait_fd, |
1487 | &subbuf->info.data.stream_instance_id.value); | |
1488 | if (ret) { | |
1489 | /* May not be supported by older LTTng-modules. */ | |
1490 | if (ret != -ENOTTY) { | |
1491 | PERROR("Failed to get stream instance id"); | |
1492 | goto end; | |
1d4dfdef | 1493 | } |
6f1177cf JG |
1494 | } else { |
1495 | subbuf->info.data.stream_instance_id.is_set = true; | |
1496 | } | |
1497 | end: | |
1498 | return ret; | |
1499 | } | |
47e81c02 | 1500 | |
6f1177cf JG |
1501 | static |
1502 | int get_subbuffer_common(struct lttng_consumer_stream *stream, | |
1503 | struct stream_subbuffer *subbuffer) | |
1504 | { | |
1505 | int ret; | |
1506 | ||
1507 | ret = kernctl_get_next_subbuf(stream->wait_fd); | |
1508 | if (ret) { | |
1509 | goto end; | |
1510 | } | |
1511 | ||
1512 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1513 | stream, subbuffer); | |
1514 | end: | |
1515 | return ret; | |
1516 | } | |
7775df52 | 1517 | |
6f1177cf JG |
1518 | static |
1519 | int get_next_subbuffer_splice(struct lttng_consumer_stream *stream, | |
1520 | struct stream_subbuffer *subbuffer) | |
1521 | { | |
1522 | int ret; | |
1d4dfdef | 1523 | |
6f1177cf JG |
1524 | ret = get_subbuffer_common(stream, subbuffer); |
1525 | if (ret) { | |
1526 | goto end; | |
1527 | } | |
1d4dfdef | 1528 | |
6f1177cf JG |
1529 | subbuffer->buffer.fd = stream->wait_fd; |
1530 | end: | |
1531 | return ret; | |
1532 | } | |
b770aa7f | 1533 | |
6f1177cf JG |
1534 | static |
1535 | int get_next_subbuffer_mmap(struct lttng_consumer_stream *stream, | |
1536 | struct stream_subbuffer *subbuffer) | |
1537 | { | |
1538 | int ret; | |
1539 | const char *addr; | |
1540 | ||
1541 | ret = get_subbuffer_common(stream, subbuffer); | |
1542 | if (ret) { | |
1543 | goto end; | |
7775df52 | 1544 | } |
6f1177cf JG |
1545 | |
1546 | ret = get_current_subbuf_addr(stream, &addr); | |
1547 | if (ret) { | |
1548 | goto end; | |
d41f73b7 | 1549 | } |
6f1177cf JG |
1550 | |
1551 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1552 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1553 | end: | |
1554 | return ret; | |
1555 | } | |
1556 | ||
8d18bcae JG |
1557 | static |
1558 | int get_next_subbuffer_metadata_check(struct lttng_consumer_stream *stream, | |
1559 | struct stream_subbuffer *subbuffer) | |
1560 | { | |
1561 | int ret; | |
1562 | const char *addr; | |
1563 | bool coherent; | |
1564 | ||
1565 | ret = kernctl_get_next_subbuf_metadata_check(stream->wait_fd, | |
1566 | &coherent); | |
1567 | if (ret) { | |
1568 | goto end; | |
1569 | } | |
1570 | ||
1571 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1572 | stream, subbuffer); | |
1573 | if (ret) { | |
1574 | goto end; | |
1575 | } | |
1576 | ||
1577 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
1578 | ||
1579 | ret = get_current_subbuf_addr(stream, &addr); | |
1580 | if (ret) { | |
1581 | goto end; | |
1582 | } | |
1583 | ||
1584 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1585 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1586 | DBG("Got metadata packet with padded_subbuf_size = %lu, coherent = %s", | |
1587 | subbuffer->info.metadata.padded_subbuf_size, | |
1588 | coherent ? "true" : "false"); | |
1589 | end: | |
1590 | return ret; | |
1591 | } | |
1592 | ||
6f1177cf JG |
1593 | static |
1594 | int put_next_subbuffer(struct lttng_consumer_stream *stream, | |
1595 | struct stream_subbuffer *subbuffer) | |
1596 | { | |
1597 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1598 | ||
1599 | if (ret) { | |
1600 | if (ret == -EFAULT) { | |
1601 | PERROR("Error in unreserving sub buffer"); | |
1602 | } else if (ret == -EIO) { | |
d41f73b7 | 1603 | /* Should never happen with newer LTTng versions */ |
6f1177cf | 1604 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); |
d41f73b7 | 1605 | } |
d41f73b7 MD |
1606 | } |
1607 | ||
6f1177cf JG |
1608 | return ret; |
1609 | } | |
1c20f0e2 | 1610 | |
8d18bcae JG |
1611 | static |
1612 | bool is_get_next_check_metadata_available(int tracer_fd) | |
1613 | { | |
1614 | return kernctl_get_next_subbuf_metadata_check(tracer_fd, NULL) != | |
1615 | -ENOTTY; | |
1616 | } | |
1617 | ||
1618 | static | |
1619 | int lttng_kconsumer_set_stream_ops( | |
6f1177cf JG |
1620 | struct lttng_consumer_stream *stream) |
1621 | { | |
8d18bcae JG |
1622 | int ret = 0; |
1623 | ||
1624 | if (stream->metadata_flag && stream->chan->is_live) { | |
1625 | DBG("Attempting to enable metadata bucketization for live consumers"); | |
1626 | if (is_get_next_check_metadata_available(stream->wait_fd)) { | |
1627 | DBG("Kernel tracer supports get_next_subbuffer_metadata_check, metadata will be accumulated until a coherent state is reached"); | |
1628 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1629 | get_next_subbuffer_metadata_check; | |
1630 | ret = consumer_stream_enable_metadata_bucketization( | |
1631 | stream); | |
1632 | if (ret) { | |
1633 | goto end; | |
1634 | } | |
1635 | } else { | |
1636 | /* | |
1637 | * The kernel tracer version is too old to indicate | |
1638 | * when the metadata stream has reached a "coherent" | |
1639 | * (parseable) point. | |
1640 | * | |
1641 | * This means that a live viewer may see an incoherent | |
1642 | * sequence of metadata and fail to parse it. | |
1643 | */ | |
1644 | WARN("Kernel tracer does not support get_next_subbuffer_metadata_check which may cause live clients to fail to parse the metadata stream"); | |
1645 | metadata_bucket_destroy(stream->metadata_bucket); | |
1646 | stream->metadata_bucket = NULL; | |
1647 | } | |
1648 | } | |
1649 | ||
1650 | if (!stream->read_subbuffer_ops.get_next_subbuffer) { | |
1651 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
1652 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1653 | get_next_subbuffer_mmap; | |
1654 | } else { | |
1655 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1656 | get_next_subbuffer_splice; | |
1657 | } | |
94d49140 JD |
1658 | } |
1659 | ||
6f1177cf JG |
1660 | if (stream->metadata_flag) { |
1661 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1662 | extract_metadata_subbuffer_info; | |
1663 | } else { | |
1664 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1665 | extract_data_subbuffer_info; | |
1666 | if (stream->chan->is_live) { | |
1667 | stream->read_subbuffer_ops.send_live_beacon = | |
1668 | consumer_flush_kernel_index; | |
1669 | } | |
309167d2 JD |
1670 | } |
1671 | ||
6f1177cf | 1672 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; |
8d18bcae JG |
1673 | end: |
1674 | return ret; | |
d41f73b7 MD |
1675 | } |
1676 | ||
1677 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1678 | { | |
1679 | int ret; | |
ffe60014 DG |
1680 | |
1681 | assert(stream); | |
1682 | ||
2bba9e53 | 1683 | /* |
e5148e25 JG |
1684 | * Don't create anything if this is set for streaming or if there is |
1685 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1686 | */ |
e5148e25 JG |
1687 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1688 | stream->chan->trace_chunk) { | |
1689 | ret = consumer_stream_create_output_files(stream, true); | |
1690 | if (ret) { | |
fe4477ee JD |
1691 | goto error; |
1692 | } | |
ffe60014 | 1693 | } |
d41f73b7 | 1694 | |
d41f73b7 MD |
1695 | if (stream->output == LTTNG_EVENT_MMAP) { |
1696 | /* get the len of the mmap region */ | |
1697 | unsigned long mmap_len; | |
1698 | ||
1699 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1700 | if (ret != 0) { | |
ffe60014 | 1701 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1702 | goto error_close_fd; |
1703 | } | |
1704 | stream->mmap_len = (size_t) mmap_len; | |
1705 | ||
ffe60014 DG |
1706 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1707 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1708 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1709 | PERROR("Error mmaping"); |
d41f73b7 MD |
1710 | ret = -1; |
1711 | goto error_close_fd; | |
1712 | } | |
1713 | } | |
1714 | ||
8d18bcae JG |
1715 | ret = lttng_kconsumer_set_stream_ops(stream); |
1716 | if (ret) { | |
1717 | goto error_close_fd; | |
1718 | } | |
6f1177cf | 1719 | |
d41f73b7 MD |
1720 | /* we return 0 to let the library handle the FD internally */ |
1721 | return 0; | |
1722 | ||
1723 | error_close_fd: | |
2f225ce2 | 1724 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1725 | int err; |
1726 | ||
1727 | err = close(stream->out_fd); | |
1728 | assert(!err); | |
2f225ce2 | 1729 | stream->out_fd = -1; |
d41f73b7 MD |
1730 | } |
1731 | error: | |
1732 | return ret; | |
1733 | } | |
1734 | ||
ca22feea DG |
1735 | /* |
1736 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1737 | * stream. Consumer data lock MUST be acquired before calling this function |
1738 | * and the stream lock. | |
ca22feea | 1739 | * |
6d805429 | 1740 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1741 | * data is available for trace viewer reading. |
1742 | */ | |
6d805429 | 1743 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1744 | { |
1745 | int ret; | |
1746 | ||
1747 | assert(stream); | |
1748 | ||
873b9e9a MD |
1749 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1750 | ret = 0; | |
1751 | goto end; | |
1752 | } | |
1753 | ||
ca22feea DG |
1754 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1755 | if (ret == 0) { | |
1756 | /* There is still data so let's put back this subbuffer. */ | |
1757 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1758 | assert(ret == 0); | |
6d805429 | 1759 | ret = 1; /* Data is pending */ |
4e9a4686 | 1760 | goto end; |
ca22feea DG |
1761 | } |
1762 | ||
6d805429 DG |
1763 | /* Data is NOT pending and ready to be read. */ |
1764 | ret = 0; | |
ca22feea | 1765 | |
6efae65e DG |
1766 | end: |
1767 | return ret; | |
ca22feea | 1768 | } |