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 | ||
7775df52 | 20 | #include <stdint.h> |
6c1c0768 | 21 | #define _LGPL_SOURCE |
3bd1e081 | 22 | #include <assert.h> |
3bd1e081 MD |
23 | #include <poll.h> |
24 | #include <pthread.h> | |
25 | #include <stdlib.h> | |
26 | #include <string.h> | |
27 | #include <sys/mman.h> | |
28 | #include <sys/socket.h> | |
29 | #include <sys/types.h> | |
77c7c900 | 30 | #include <inttypes.h> |
3bd1e081 | 31 | #include <unistd.h> |
dbb5dfe6 | 32 | #include <sys/stat.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> |
0857097f | 48 | |
10a8a223 | 49 | #include "kernel-consumer.h" |
3bd1e081 MD |
50 | |
51 | extern struct lttng_consumer_global_data consumer_data; | |
52 | extern int consumer_poll_timeout; | |
3bd1e081 | 53 | |
3bd1e081 MD |
54 | /* |
55 | * Take a snapshot for a specific fd | |
56 | * | |
57 | * Returns 0 on success, < 0 on error | |
58 | */ | |
ffe60014 | 59 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
60 | { |
61 | int ret = 0; | |
62 | int infd = stream->wait_fd; | |
63 | ||
64 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
65 | /* |
66 | * -EAGAIN is not an error, it just means that there is no data to | |
67 | * be read. | |
68 | */ | |
69 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 70 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
71 | } |
72 | ||
73 | return ret; | |
74 | } | |
75 | ||
e9404c27 JG |
76 | /* |
77 | * Sample consumed and produced positions for a specific fd. | |
78 | * | |
79 | * Returns 0 on success, < 0 on error. | |
80 | */ | |
81 | int lttng_kconsumer_sample_snapshot_positions( | |
82 | struct lttng_consumer_stream *stream) | |
83 | { | |
84 | assert(stream); | |
85 | ||
86 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
87 | } | |
88 | ||
3bd1e081 MD |
89 | /* |
90 | * Get the produced position | |
91 | * | |
92 | * Returns 0 on success, < 0 on error | |
93 | */ | |
ffe60014 | 94 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
95 | unsigned long *pos) |
96 | { | |
97 | int ret; | |
98 | int infd = stream->wait_fd; | |
99 | ||
100 | ret = kernctl_snapshot_get_produced(infd, pos); | |
101 | if (ret != 0) { | |
5a510c9f | 102 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
103 | } |
104 | ||
105 | return ret; | |
106 | } | |
107 | ||
07b86b52 JD |
108 | /* |
109 | * Get the consumerd position | |
110 | * | |
111 | * Returns 0 on success, < 0 on error | |
112 | */ | |
113 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
114 | unsigned long *pos) | |
115 | { | |
116 | int ret; | |
117 | int infd = stream->wait_fd; | |
118 | ||
119 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
120 | if (ret != 0) { | |
5a510c9f | 121 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
122 | } |
123 | ||
124 | return ret; | |
125 | } | |
126 | ||
7775df52 JG |
127 | static |
128 | int get_current_subbuf_addr(struct lttng_consumer_stream *stream, | |
129 | const char **addr) | |
130 | { | |
131 | int ret; | |
132 | unsigned long mmap_offset; | |
133 | const char *mmap_base = stream->mmap_base; | |
134 | ||
135 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
136 | if (ret < 0) { | |
137 | PERROR("Failed to get mmap read offset"); | |
138 | goto error; | |
139 | } | |
140 | ||
141 | *addr = mmap_base + mmap_offset; | |
142 | error: | |
143 | return ret; | |
144 | } | |
145 | ||
07b86b52 JD |
146 | /* |
147 | * Take a snapshot of all the stream of a channel | |
b0226bd4 | 148 | * RCU read-side lock must be held across this function to ensure existence of |
e5148e25 | 149 | * channel. The channel lock must be held by the caller. |
07b86b52 JD |
150 | * |
151 | * Returns 0 on success, < 0 on error | |
152 | */ | |
f0f048c9 JG |
153 | static int lttng_kconsumer_snapshot_channel( |
154 | struct lttng_consumer_channel *channel, | |
155 | uint64_t key, char *path, uint64_t relayd_id, | |
156 | uint64_t nb_packets_per_stream, | |
5c786ded | 157 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
158 | { |
159 | int ret; | |
07b86b52 JD |
160 | struct lttng_consumer_stream *stream; |
161 | ||
6a00837f | 162 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 JD |
163 | |
164 | rcu_read_lock(); | |
165 | ||
07b86b52 JD |
166 | /* Splice is not supported yet for channel snapshot. */ |
167 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
7318a78f JG |
168 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
169 | channel->name); | |
07b86b52 JD |
170 | ret = -1; |
171 | goto end; | |
172 | } | |
173 | ||
10a50311 | 174 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 175 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
176 | |
177 | health_code_update(); | |
178 | ||
07b86b52 JD |
179 | /* |
180 | * Lock stream because we are about to change its state. | |
181 | */ | |
182 | pthread_mutex_lock(&stream->lock); | |
183 | ||
e5148e25 JG |
184 | assert(channel->trace_chunk); |
185 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { | |
186 | /* | |
187 | * Can't happen barring an internal error as the channel | |
188 | * holds a reference to the trace chunk. | |
189 | */ | |
190 | ERR("Failed to acquire reference to channel's trace chunk"); | |
191 | ret = -1; | |
192 | goto end_unlock; | |
193 | } | |
194 | assert(!stream->trace_chunk); | |
195 | stream->trace_chunk = channel->trace_chunk; | |
196 | ||
29decac3 DG |
197 | /* |
198 | * Assign the received relayd ID so we can use it for streaming. The streams | |
199 | * are not visible to anyone so this is OK to change it. | |
200 | */ | |
07b86b52 JD |
201 | stream->net_seq_idx = relayd_id; |
202 | channel->relayd_id = relayd_id; | |
203 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 204 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
205 | if (ret < 0) { |
206 | ERR("sending stream to relayd"); | |
207 | goto end_unlock; | |
208 | } | |
07b86b52 | 209 | } else { |
e5148e25 JG |
210 | ret = consumer_stream_create_output_files(stream, |
211 | false); | |
07b86b52 | 212 | if (ret < 0) { |
07b86b52 JD |
213 | goto end_unlock; |
214 | } | |
e5148e25 JG |
215 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
216 | stream->key); | |
07b86b52 JD |
217 | } |
218 | ||
f22dd891 | 219 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 220 | if (ret < 0) { |
f22dd891 MD |
221 | /* |
222 | * Doing a buffer flush which does not take into | |
223 | * account empty packets. This is not perfect | |
224 | * for stream intersection, but required as a | |
225 | * fall-back when "flush_empty" is not | |
226 | * implemented by lttng-modules. | |
227 | */ | |
228 | ret = kernctl_buffer_flush(stream->wait_fd); | |
229 | if (ret < 0) { | |
230 | ERR("Failed to flush kernel stream"); | |
231 | goto end_unlock; | |
232 | } | |
07b86b52 JD |
233 | goto end_unlock; |
234 | } | |
235 | ||
236 | ret = lttng_kconsumer_take_snapshot(stream); | |
237 | if (ret < 0) { | |
238 | ERR("Taking kernel snapshot"); | |
239 | goto end_unlock; | |
240 | } | |
241 | ||
242 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
243 | if (ret < 0) { | |
244 | ERR("Produced kernel snapshot position"); | |
245 | goto end_unlock; | |
246 | } | |
247 | ||
248 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
249 | if (ret < 0) { | |
250 | ERR("Consumerd kernel snapshot position"); | |
251 | goto end_unlock; | |
252 | } | |
253 | ||
d07ceecd MD |
254 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
255 | produced_pos, nb_packets_per_stream, | |
256 | stream->max_sb_size); | |
5c786ded | 257 | |
0fdaf1ed | 258 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
259 | ssize_t read_len; |
260 | unsigned long len, padded_len; | |
7775df52 | 261 | const char *subbuf_addr; |
07b86b52 | 262 | |
9ce5646a MD |
263 | health_code_update(); |
264 | ||
07b86b52 JD |
265 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
266 | ||
267 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
268 | if (ret < 0) { | |
32af2c95 | 269 | if (ret != -EAGAIN) { |
07b86b52 JD |
270 | PERROR("kernctl_get_subbuf snapshot"); |
271 | goto end_unlock; | |
272 | } | |
273 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
274 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 275 | stream->chan->lost_packets++; |
07b86b52 JD |
276 | continue; |
277 | } | |
278 | ||
279 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
280 | if (ret < 0) { | |
281 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 282 | goto error_put_subbuf; |
07b86b52 JD |
283 | } |
284 | ||
285 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
286 | if (ret < 0) { | |
287 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 288 | goto error_put_subbuf; |
07b86b52 JD |
289 | } |
290 | ||
7775df52 JG |
291 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
292 | if (ret) { | |
293 | goto error_put_subbuf; | |
294 | } | |
295 | ||
296 | read_len = lttng_consumer_on_read_subbuffer_mmap(ctx, | |
297 | stream, subbuf_addr, len, | |
309167d2 | 298 | padded_len - len, NULL); |
07b86b52 | 299 | /* |
29decac3 DG |
300 | * We write the padded len in local tracefiles but the data len |
301 | * when using a relay. Display the error but continue processing | |
302 | * to try to release the subbuffer. | |
07b86b52 JD |
303 | */ |
304 | if (relayd_id != (uint64_t) -1ULL) { | |
305 | if (read_len != len) { | |
306 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
307 | read_len, len); | |
308 | } | |
309 | } else { | |
310 | if (read_len != padded_len) { | |
311 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
312 | read_len, padded_len); | |
313 | } | |
314 | } | |
315 | ||
316 | ret = kernctl_put_subbuf(stream->wait_fd); | |
317 | if (ret < 0) { | |
318 | ERR("Snapshot kernctl_put_subbuf"); | |
319 | goto end_unlock; | |
320 | } | |
321 | consumed_pos += stream->max_sb_size; | |
322 | } | |
323 | ||
324 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
325 | if (stream->out_fd >= 0) { |
326 | ret = close(stream->out_fd); | |
327 | if (ret < 0) { | |
328 | PERROR("Kernel consumer snapshot close out_fd"); | |
329 | goto end_unlock; | |
330 | } | |
331 | stream->out_fd = -1; | |
07b86b52 | 332 | } |
07b86b52 JD |
333 | } else { |
334 | close_relayd_stream(stream); | |
335 | stream->net_seq_idx = (uint64_t) -1ULL; | |
336 | } | |
e5148e25 JG |
337 | lttng_trace_chunk_put(stream->trace_chunk); |
338 | stream->trace_chunk = NULL; | |
07b86b52 JD |
339 | pthread_mutex_unlock(&stream->lock); |
340 | } | |
341 | ||
342 | /* All good! */ | |
343 | ret = 0; | |
344 | goto end; | |
345 | ||
29decac3 DG |
346 | error_put_subbuf: |
347 | ret = kernctl_put_subbuf(stream->wait_fd); | |
348 | if (ret < 0) { | |
349 | ERR("Snapshot kernctl_put_subbuf error path"); | |
350 | } | |
07b86b52 JD |
351 | end_unlock: |
352 | pthread_mutex_unlock(&stream->lock); | |
353 | end: | |
354 | rcu_read_unlock(); | |
355 | return ret; | |
356 | } | |
357 | ||
358 | /* | |
359 | * Read the whole metadata available for a snapshot. | |
b0226bd4 | 360 | * RCU read-side lock must be held across this function to ensure existence of |
e5148e25 | 361 | * metadata_channel. The channel lock must be held by the caller. |
07b86b52 JD |
362 | * |
363 | * Returns 0 on success, < 0 on error | |
364 | */ | |
e5148e25 JG |
365 | static int lttng_kconsumer_snapshot_metadata( |
366 | struct lttng_consumer_channel *metadata_channel, | |
b0226bd4 MD |
367 | uint64_t key, char *path, uint64_t relayd_id, |
368 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 369 | { |
d771f832 DG |
370 | int ret, use_relayd = 0; |
371 | ssize_t ret_read; | |
07b86b52 | 372 | struct lttng_consumer_stream *metadata_stream; |
d771f832 DG |
373 | |
374 | assert(ctx); | |
07b86b52 JD |
375 | |
376 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
377 | key, path); | |
378 | ||
379 | rcu_read_lock(); | |
380 | ||
07b86b52 JD |
381 | metadata_stream = metadata_channel->metadata_stream; |
382 | assert(metadata_stream); | |
e5148e25 | 383 | |
c55fe3e3 | 384 | pthread_mutex_lock(&metadata_stream->lock); |
e5148e25 JG |
385 | assert(metadata_channel->trace_chunk); |
386 | assert(metadata_stream->trace_chunk); | |
07b86b52 | 387 | |
d771f832 | 388 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 389 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
390 | use_relayd = 1; |
391 | } | |
392 | ||
393 | if (use_relayd) { | |
10a50311 | 394 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 395 | if (ret < 0) { |
c55fe3e3 | 396 | goto error_snapshot; |
e2039c7a | 397 | } |
e2039c7a | 398 | } else { |
e5148e25 JG |
399 | ret = consumer_stream_create_output_files(metadata_stream, |
400 | false); | |
e2039c7a | 401 | if (ret < 0) { |
c55fe3e3 | 402 | goto error_snapshot; |
e2039c7a | 403 | } |
07b86b52 | 404 | } |
07b86b52 | 405 | |
d771f832 | 406 | do { |
9ce5646a MD |
407 | health_code_update(); |
408 | ||
e5148e25 | 409 | ret_read = lttng_kconsumer_read_subbuffer(metadata_stream, ctx); |
d771f832 | 410 | if (ret_read < 0) { |
56591bac | 411 | if (ret_read != -EAGAIN) { |
6a00837f | 412 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
d771f832 | 413 | ret_read); |
c55fe3e3 JG |
414 | ret = ret_read; |
415 | goto error_snapshot; | |
07b86b52 | 416 | } |
d771f832 | 417 | /* ret_read is negative at this point so we will exit the loop. */ |
07b86b52 JD |
418 | continue; |
419 | } | |
d771f832 | 420 | } while (ret_read >= 0); |
07b86b52 | 421 | |
d771f832 DG |
422 | if (use_relayd) { |
423 | close_relayd_stream(metadata_stream); | |
424 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
425 | } else { | |
fdf9986c MD |
426 | if (metadata_stream->out_fd >= 0) { |
427 | ret = close(metadata_stream->out_fd); | |
428 | if (ret < 0) { | |
429 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
430 | /* | |
431 | * Don't go on error here since the snapshot was successful at this | |
432 | * point but somehow the close failed. | |
433 | */ | |
434 | } | |
435 | metadata_stream->out_fd = -1; | |
e5148e25 JG |
436 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
437 | metadata_stream->trace_chunk = NULL; | |
e2039c7a | 438 | } |
e2039c7a JD |
439 | } |
440 | ||
07b86b52 | 441 | ret = 0; |
c55fe3e3 JG |
442 | error_snapshot: |
443 | pthread_mutex_unlock(&metadata_stream->lock); | |
cf53a8a6 JD |
444 | cds_list_del(&metadata_stream->send_node); |
445 | consumer_stream_destroy(metadata_stream, NULL); | |
446 | metadata_channel->metadata_stream = NULL; | |
07b86b52 JD |
447 | rcu_read_unlock(); |
448 | return ret; | |
449 | } | |
450 | ||
1803a064 MD |
451 | /* |
452 | * Receive command from session daemon and process it. | |
453 | * | |
454 | * Return 1 on success else a negative value or 0. | |
455 | */ | |
3bd1e081 MD |
456 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
457 | int sock, struct pollfd *consumer_sockpoll) | |
458 | { | |
459 | ssize_t ret; | |
0c759fc9 | 460 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
461 | struct lttcomm_consumer_msg msg; |
462 | ||
9ce5646a MD |
463 | health_code_update(); |
464 | ||
3bd1e081 MD |
465 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
466 | if (ret != sizeof(msg)) { | |
1803a064 | 467 | if (ret > 0) { |
c6857fcf | 468 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
1803a064 MD |
469 | ret = -1; |
470 | } | |
3bd1e081 MD |
471 | return ret; |
472 | } | |
9ce5646a MD |
473 | |
474 | health_code_update(); | |
475 | ||
84382d49 MD |
476 | /* Deprecated command */ |
477 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 478 | |
9ce5646a MD |
479 | health_code_update(); |
480 | ||
b0b335c8 MD |
481 | /* relayd needs RCU read-side protection */ |
482 | rcu_read_lock(); | |
483 | ||
3bd1e081 | 484 | switch (msg.cmd_type) { |
00e2e675 DG |
485 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
486 | { | |
f50f23d9 | 487 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 488 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 489 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 | 490 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
2527bf85 | 491 | msg.u.relayd_sock.relayd_session_id); |
00e2e675 DG |
492 | goto end_nosignal; |
493 | } | |
3bd1e081 MD |
494 | case LTTNG_CONSUMER_ADD_CHANNEL: |
495 | { | |
496 | struct lttng_consumer_channel *new_channel; | |
e43c41c5 | 497 | int ret_recv; |
e5148e25 | 498 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 499 | |
9ce5646a MD |
500 | health_code_update(); |
501 | ||
f50f23d9 DG |
502 | /* First send a status message before receiving the fds. */ |
503 | ret = consumer_send_status_msg(sock, ret_code); | |
504 | if (ret < 0) { | |
505 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 506 | goto error_fatal; |
f50f23d9 | 507 | } |
9ce5646a MD |
508 | |
509 | health_code_update(); | |
510 | ||
d88aee68 | 511 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 512 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
e5148e25 JG |
513 | msg.u.channel.session_id, |
514 | msg.u.channel.chunk_id.is_set ? | |
515 | &chunk_id : NULL, | |
516 | msg.u.channel.pathname, | |
517 | msg.u.channel.name, | |
1624d5b7 JD |
518 | msg.u.channel.relayd_id, msg.u.channel.output, |
519 | msg.u.channel.tracefile_size, | |
1950109e | 520 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 521 | msg.u.channel.monitor, |
d7ba1388 | 522 | msg.u.channel.live_timer_interval, |
3d071855 | 523 | NULL, NULL); |
3bd1e081 | 524 | if (new_channel == NULL) { |
f73fabfd | 525 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
526 | goto end_nosignal; |
527 | } | |
ffe60014 | 528 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
529 | switch (msg.u.channel.output) { |
530 | case LTTNG_EVENT_SPLICE: | |
531 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
532 | break; | |
533 | case LTTNG_EVENT_MMAP: | |
534 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
535 | break; | |
536 | default: | |
537 | ERR("Channel output unknown %d", msg.u.channel.output); | |
538 | goto end_nosignal; | |
539 | } | |
ffe60014 DG |
540 | |
541 | /* Translate and save channel type. */ | |
542 | switch (msg.u.channel.type) { | |
543 | case CONSUMER_CHANNEL_TYPE_DATA: | |
544 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
545 | new_channel->type = msg.u.channel.type; | |
546 | break; | |
547 | default: | |
548 | assert(0); | |
549 | goto end_nosignal; | |
550 | }; | |
551 | ||
9ce5646a MD |
552 | health_code_update(); |
553 | ||
3bd1e081 | 554 | if (ctx->on_recv_channel != NULL) { |
e43c41c5 JD |
555 | ret_recv = ctx->on_recv_channel(new_channel); |
556 | if (ret_recv == 0) { | |
557 | ret = consumer_add_channel(new_channel, ctx); | |
558 | } else if (ret_recv < 0) { | |
3bd1e081 MD |
559 | goto end_nosignal; |
560 | } | |
561 | } else { | |
e43c41c5 | 562 | ret = consumer_add_channel(new_channel, ctx); |
3bd1e081 | 563 | } |
e9404c27 JG |
564 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && !ret) { |
565 | int monitor_start_ret; | |
566 | ||
567 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
568 | consumer_timer_live_start(new_channel, |
569 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
570 | monitor_start_ret = consumer_timer_monitor_start( |
571 | new_channel, | |
572 | msg.u.channel.monitor_timer_interval); | |
573 | if (monitor_start_ret < 0) { | |
574 | ERR("Starting channel monitoring timer failed"); | |
575 | goto end_nosignal; | |
576 | } | |
577 | ||
94d49140 | 578 | } |
e43c41c5 | 579 | |
9ce5646a MD |
580 | health_code_update(); |
581 | ||
e43c41c5 | 582 | /* If we received an error in add_channel, we need to report it. */ |
821fffb2 | 583 | if (ret < 0) { |
1803a064 MD |
584 | ret = consumer_send_status_msg(sock, ret); |
585 | if (ret < 0) { | |
586 | goto error_fatal; | |
587 | } | |
e43c41c5 JD |
588 | goto end_nosignal; |
589 | } | |
590 | ||
3bd1e081 MD |
591 | goto end_nosignal; |
592 | } | |
593 | case LTTNG_CONSUMER_ADD_STREAM: | |
594 | { | |
dae10966 DG |
595 | int fd; |
596 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 597 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 598 | struct lttng_consumer_channel *channel; |
c80048c6 | 599 | int alloc_ret = 0; |
3bd1e081 | 600 | |
ffe60014 DG |
601 | /* |
602 | * Get stream's channel reference. Needed when adding the stream to the | |
603 | * global hash table. | |
604 | */ | |
605 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
606 | if (!channel) { | |
607 | /* | |
608 | * We could not find the channel. Can happen if cpu hotplug | |
609 | * happens while tearing down. | |
610 | */ | |
d88aee68 | 611 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 612 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
613 | } |
614 | ||
9ce5646a MD |
615 | health_code_update(); |
616 | ||
f50f23d9 DG |
617 | /* First send a status message before receiving the fds. */ |
618 | ret = consumer_send_status_msg(sock, ret_code); | |
1803a064 | 619 | if (ret < 0) { |
d771f832 | 620 | /* Somehow, the session daemon is not responding anymore. */ |
e0e7757d | 621 | goto error_add_stream_fatal; |
1803a064 | 622 | } |
9ce5646a MD |
623 | |
624 | health_code_update(); | |
625 | ||
0c759fc9 | 626 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 627 | /* Channel was not found. */ |
e0e7757d | 628 | goto error_add_stream_nosignal; |
f50f23d9 DG |
629 | } |
630 | ||
d771f832 | 631 | /* Blocking call */ |
9ce5646a MD |
632 | health_poll_entry(); |
633 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
634 | health_poll_exit(); | |
84382d49 | 635 | if (ret) { |
e0e7757d | 636 | goto error_add_stream_fatal; |
3bd1e081 | 637 | } |
00e2e675 | 638 | |
9ce5646a MD |
639 | health_code_update(); |
640 | ||
00e2e675 | 641 | /* Get stream file descriptor from socket */ |
f2fc6720 MD |
642 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
643 | if (ret != sizeof(fd)) { | |
f73fabfd | 644 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
e0e7757d | 645 | goto end; |
3bd1e081 | 646 | } |
3bd1e081 | 647 | |
9ce5646a MD |
648 | health_code_update(); |
649 | ||
f50f23d9 DG |
650 | /* |
651 | * Send status code to session daemon only if the recv works. If the | |
652 | * above recv() failed, the session daemon is notified through the | |
653 | * error socket and the teardown is eventually done. | |
654 | */ | |
655 | ret = consumer_send_status_msg(sock, ret_code); | |
656 | if (ret < 0) { | |
657 | /* Somehow, the session daemon is not responding anymore. */ | |
e0e7757d | 658 | goto error_add_stream_nosignal; |
f50f23d9 DG |
659 | } |
660 | ||
9ce5646a MD |
661 | health_code_update(); |
662 | ||
e5148e25 | 663 | pthread_mutex_lock(&channel->lock); |
ffe60014 DG |
664 | new_stream = consumer_allocate_stream(channel->key, |
665 | fd, | |
ffe60014 | 666 | channel->name, |
ffe60014 DG |
667 | channel->relayd_id, |
668 | channel->session_id, | |
e5148e25 | 669 | channel->trace_chunk, |
ffe60014 DG |
670 | msg.u.stream.cpu, |
671 | &alloc_ret, | |
4891ece8 | 672 | channel->type, |
e5148e25 | 673 | channel->monitor); |
3bd1e081 | 674 | if (new_stream == NULL) { |
c80048c6 MD |
675 | switch (alloc_ret) { |
676 | case -ENOMEM: | |
677 | case -EINVAL: | |
678 | default: | |
679 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
680 | break; | |
c80048c6 | 681 | } |
e5148e25 | 682 | pthread_mutex_unlock(&channel->lock); |
e0e7757d | 683 | goto error_add_stream_nosignal; |
3bd1e081 | 684 | } |
d771f832 | 685 | |
ffe60014 DG |
686 | new_stream->chan = channel; |
687 | new_stream->wait_fd = fd; | |
2c42aa5c JG |
688 | ret = kernctl_get_max_subbuf_size(new_stream->wait_fd, |
689 | &new_stream->max_sb_size); | |
690 | if (ret < 0) { | |
691 | pthread_mutex_unlock(&channel->lock); | |
692 | ERR("Failed to get kernel maximal subbuffer size"); | |
e0e7757d | 693 | goto error_add_stream_nosignal; |
2c42aa5c JG |
694 | } |
695 | ||
d9a2e16e JD |
696 | consumer_stream_update_channel_attributes(new_stream, |
697 | channel); | |
07b86b52 JD |
698 | switch (channel->output) { |
699 | case CONSUMER_CHANNEL_SPLICE: | |
700 | new_stream->output = LTTNG_EVENT_SPLICE; | |
a2361a61 JD |
701 | ret = utils_create_pipe(new_stream->splice_pipe); |
702 | if (ret < 0) { | |
e5148e25 | 703 | pthread_mutex_unlock(&channel->lock); |
e0e7757d | 704 | goto error_add_stream_nosignal; |
a2361a61 | 705 | } |
07b86b52 JD |
706 | break; |
707 | case CONSUMER_CHANNEL_MMAP: | |
708 | new_stream->output = LTTNG_EVENT_MMAP; | |
709 | break; | |
710 | default: | |
711 | ERR("Stream output unknown %d", channel->output); | |
e5148e25 | 712 | pthread_mutex_unlock(&channel->lock); |
e0e7757d | 713 | goto error_add_stream_nosignal; |
07b86b52 | 714 | } |
00e2e675 | 715 | |
a0c83db9 DG |
716 | /* |
717 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
718 | * refcount right now. We don't need to increment the refcount for |
719 | * streams in no monitor because we handle manually the cleanup of | |
720 | * those. It is very important to make sure there is NO prior | |
721 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 722 | */ |
07b86b52 JD |
723 | if (channel->monitor) { |
724 | uatomic_inc(&new_stream->chan->refcount); | |
725 | } | |
9d9353f9 | 726 | |
fb3a43a9 DG |
727 | /* |
728 | * The buffer flush is done on the session daemon side for the kernel | |
729 | * so no need for the stream "hangup_flush_done" variable to be | |
730 | * tracked. This is important for a kernel stream since we don't rely | |
731 | * on the flush state of the stream to read data. It's not the case for | |
732 | * user space tracing. | |
733 | */ | |
734 | new_stream->hangup_flush_done = 0; | |
735 | ||
9ce5646a MD |
736 | health_code_update(); |
737 | ||
e5148e25 | 738 | pthread_mutex_lock(&new_stream->lock); |
633d0084 DG |
739 | if (ctx->on_recv_stream) { |
740 | ret = ctx->on_recv_stream(new_stream); | |
741 | if (ret < 0) { | |
e5148e25 JG |
742 | pthread_mutex_unlock(&new_stream->lock); |
743 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 744 | consumer_stream_free(new_stream); |
e0e7757d | 745 | goto error_add_stream_nosignal; |
fb3a43a9 | 746 | } |
633d0084 | 747 | } |
9ce5646a MD |
748 | health_code_update(); |
749 | ||
07b86b52 JD |
750 | if (new_stream->metadata_flag) { |
751 | channel->metadata_stream = new_stream; | |
752 | } | |
753 | ||
2bba9e53 DG |
754 | /* Do not monitor this stream. */ |
755 | if (!channel->monitor) { | |
5eecee74 | 756 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 757 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 758 | new_stream->net_seq_idx); |
10a50311 | 759 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
e5148e25 JG |
760 | pthread_mutex_unlock(&new_stream->lock); |
761 | pthread_mutex_unlock(&channel->lock); | |
e0e7757d | 762 | goto end_add_stream; |
6dc3064a DG |
763 | } |
764 | ||
e1b71bdc DG |
765 | /* Send stream to relayd if the stream has an ID. */ |
766 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
194ee077 DG |
767 | ret = consumer_send_relayd_stream(new_stream, |
768 | new_stream->chan->pathname); | |
e1b71bdc | 769 | if (ret < 0) { |
e5148e25 JG |
770 | pthread_mutex_unlock(&new_stream->lock); |
771 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 772 | consumer_stream_free(new_stream); |
e0e7757d | 773 | goto error_add_stream_nosignal; |
e1b71bdc | 774 | } |
001b7e62 MD |
775 | |
776 | /* | |
777 | * If adding an extra stream to an already | |
778 | * existing channel (e.g. cpu hotplug), we need | |
779 | * to send the "streams_sent" command to relayd. | |
780 | */ | |
781 | if (channel->streams_sent_to_relayd) { | |
782 | ret = consumer_send_relayd_streams_sent( | |
783 | new_stream->net_seq_idx); | |
784 | if (ret < 0) { | |
e5148e25 JG |
785 | pthread_mutex_unlock(&new_stream->lock); |
786 | pthread_mutex_unlock(&channel->lock); | |
e0e7757d | 787 | goto error_add_stream_nosignal; |
001b7e62 MD |
788 | } |
789 | } | |
e2039c7a | 790 | } |
e5148e25 JG |
791 | pthread_mutex_unlock(&new_stream->lock); |
792 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 793 | |
50f8ae69 | 794 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 795 | if (new_stream->metadata_flag) { |
66d583dc | 796 | consumer_add_metadata_stream(new_stream); |
dae10966 | 797 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 798 | } else { |
66d583dc | 799 | consumer_add_data_stream(new_stream); |
dae10966 | 800 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
801 | } |
802 | ||
66d583dc | 803 | /* Visible to other threads */ |
5ab66908 MD |
804 | new_stream->globally_visible = 1; |
805 | ||
9ce5646a MD |
806 | health_code_update(); |
807 | ||
dae10966 | 808 | ret = lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream)); |
50f8ae69 | 809 | if (ret < 0) { |
dae10966 | 810 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 811 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 812 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
813 | if (new_stream->metadata_flag) { |
814 | consumer_del_stream_for_metadata(new_stream); | |
815 | } else { | |
816 | consumer_del_stream_for_data(new_stream); | |
817 | } | |
e0e7757d | 818 | goto error_add_stream_nosignal; |
3bd1e081 | 819 | } |
00e2e675 | 820 | |
02d02e31 JD |
821 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
822 | new_stream->name, fd, new_stream->chan->pathname, new_stream->relayd_stream_id); | |
e0e7757d | 823 | end_add_stream: |
3bd1e081 | 824 | break; |
e0e7757d JG |
825 | error_add_stream_nosignal: |
826 | goto end_nosignal; | |
827 | error_add_stream_fatal: | |
828 | goto error_fatal; | |
3bd1e081 | 829 | } |
a4baae1b JD |
830 | case LTTNG_CONSUMER_STREAMS_SENT: |
831 | { | |
832 | struct lttng_consumer_channel *channel; | |
833 | ||
834 | /* | |
835 | * Get stream's channel reference. Needed when adding the stream to the | |
836 | * global hash table. | |
837 | */ | |
838 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
839 | if (!channel) { | |
840 | /* | |
841 | * We could not find the channel. Can happen if cpu hotplug | |
842 | * happens while tearing down. | |
843 | */ | |
844 | ERR("Unable to find channel key %" PRIu64, | |
845 | msg.u.sent_streams.channel_key); | |
e462382a | 846 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
847 | } |
848 | ||
849 | health_code_update(); | |
850 | ||
851 | /* | |
852 | * Send status code to session daemon. | |
853 | */ | |
854 | ret = consumer_send_status_msg(sock, ret_code); | |
f261ad0a | 855 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
a4baae1b | 856 | /* Somehow, the session daemon is not responding anymore. */ |
6ec577e9 | 857 | goto error_streams_sent_nosignal; |
a4baae1b JD |
858 | } |
859 | ||
860 | health_code_update(); | |
861 | ||
862 | /* | |
863 | * We should not send this message if we don't monitor the | |
864 | * streams in this channel. | |
865 | */ | |
866 | if (!channel->monitor) { | |
6ec577e9 | 867 | goto end_error_streams_sent; |
a4baae1b JD |
868 | } |
869 | ||
870 | health_code_update(); | |
871 | /* Send stream to relayd if the stream has an ID. */ | |
872 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
873 | ret = consumer_send_relayd_streams_sent( | |
874 | msg.u.sent_streams.net_seq_idx); | |
875 | if (ret < 0) { | |
6ec577e9 | 876 | goto error_streams_sent_nosignal; |
a4baae1b | 877 | } |
001b7e62 | 878 | channel->streams_sent_to_relayd = true; |
a4baae1b | 879 | } |
6ec577e9 | 880 | end_error_streams_sent: |
a4baae1b | 881 | break; |
6ec577e9 JG |
882 | error_streams_sent_nosignal: |
883 | goto end_nosignal; | |
a4baae1b | 884 | } |
3bd1e081 MD |
885 | case LTTNG_CONSUMER_UPDATE_STREAM: |
886 | { | |
3f8e211f DG |
887 | rcu_read_unlock(); |
888 | return -ENOSYS; | |
889 | } | |
890 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
891 | { | |
a6ba4fe1 | 892 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f DG |
893 | struct consumer_relayd_sock_pair *relayd; |
894 | ||
a6ba4fe1 | 895 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
896 | |
897 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 898 | relayd = consumer_find_relayd(index); |
3f8e211f | 899 | if (relayd == NULL) { |
3448e266 | 900 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 901 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 902 | } |
3f8e211f | 903 | |
a6ba4fe1 DG |
904 | /* |
905 | * Each relayd socket pair has a refcount of stream attached to it | |
906 | * which tells if the relayd is still active or not depending on the | |
907 | * refcount value. | |
908 | * | |
909 | * This will set the destroy flag of the relayd object and destroy it | |
910 | * if the refcount reaches zero when called. | |
911 | * | |
912 | * The destroy can happen either here or when a stream fd hangs up. | |
913 | */ | |
f50f23d9 DG |
914 | if (relayd) { |
915 | consumer_flag_relayd_for_destroy(relayd); | |
916 | } | |
917 | ||
9ce5646a MD |
918 | health_code_update(); |
919 | ||
f50f23d9 DG |
920 | ret = consumer_send_status_msg(sock, ret_code); |
921 | if (ret < 0) { | |
922 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 923 | goto error_fatal; |
f50f23d9 | 924 | } |
3f8e211f | 925 | |
3f8e211f | 926 | goto end_nosignal; |
3bd1e081 | 927 | } |
6d805429 | 928 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 929 | { |
c8f59ee5 | 930 | int32_t ret; |
6d805429 | 931 | uint64_t id = msg.u.data_pending.session_id; |
c8f59ee5 | 932 | |
6d805429 | 933 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 934 | |
6d805429 | 935 | ret = consumer_data_pending(id); |
c8f59ee5 | 936 | |
9ce5646a MD |
937 | health_code_update(); |
938 | ||
c8f59ee5 DG |
939 | /* Send back returned value to session daemon */ |
940 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
941 | if (ret < 0) { | |
6d805429 | 942 | PERROR("send data pending ret code"); |
1803a064 | 943 | goto error_fatal; |
c8f59ee5 | 944 | } |
f50f23d9 DG |
945 | |
946 | /* | |
947 | * No need to send back a status message since the data pending | |
948 | * returned value is the response. | |
949 | */ | |
c8f59ee5 | 950 | break; |
53632229 | 951 | } |
6dc3064a DG |
952 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
953 | { | |
b0226bd4 MD |
954 | struct lttng_consumer_channel *channel; |
955 | uint64_t key = msg.u.snapshot_channel.key; | |
956 | ||
957 | channel = consumer_find_channel(key); | |
958 | if (!channel) { | |
959 | ERR("Channel %" PRIu64 " not found", key); | |
960 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 961 | } else { |
e5148e25 | 962 | pthread_mutex_lock(&channel->lock); |
b0226bd4 MD |
963 | if (msg.u.snapshot_channel.metadata == 1) { |
964 | ret = lttng_kconsumer_snapshot_metadata(channel, key, | |
965 | msg.u.snapshot_channel.pathname, | |
966 | msg.u.snapshot_channel.relayd_id, ctx); | |
967 | if (ret < 0) { | |
968 | ERR("Snapshot metadata failed"); | |
969 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
970 | } | |
971 | } else { | |
972 | ret = lttng_kconsumer_snapshot_channel(channel, key, | |
973 | msg.u.snapshot_channel.pathname, | |
974 | msg.u.snapshot_channel.relayd_id, | |
975 | msg.u.snapshot_channel.nb_packets_per_stream, | |
976 | ctx); | |
977 | if (ret < 0) { | |
978 | ERR("Snapshot channel failed"); | |
979 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
980 | } | |
07b86b52 | 981 | } |
e5148e25 | 982 | pthread_mutex_unlock(&channel->lock); |
07b86b52 | 983 | } |
9ce5646a MD |
984 | health_code_update(); |
985 | ||
6dc3064a DG |
986 | ret = consumer_send_status_msg(sock, ret_code); |
987 | if (ret < 0) { | |
988 | /* Somehow, the session daemon is not responding anymore. */ | |
989 | goto end_nosignal; | |
990 | } | |
991 | break; | |
992 | } | |
07b86b52 JD |
993 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
994 | { | |
995 | uint64_t key = msg.u.destroy_channel.key; | |
996 | struct lttng_consumer_channel *channel; | |
997 | ||
998 | channel = consumer_find_channel(key); | |
999 | if (!channel) { | |
1000 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 1001 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
1002 | } |
1003 | ||
9ce5646a MD |
1004 | health_code_update(); |
1005 | ||
07b86b52 JD |
1006 | ret = consumer_send_status_msg(sock, ret_code); |
1007 | if (ret < 0) { | |
1008 | /* Somehow, the session daemon is not responding anymore. */ | |
09d3dbc0 | 1009 | goto end_destroy_channel; |
07b86b52 JD |
1010 | } |
1011 | ||
9ce5646a MD |
1012 | health_code_update(); |
1013 | ||
15dc512a DG |
1014 | /* Stop right now if no channel was found. */ |
1015 | if (!channel) { | |
09d3dbc0 | 1016 | goto end_destroy_channel; |
15dc512a DG |
1017 | } |
1018 | ||
07b86b52 JD |
1019 | /* |
1020 | * This command should ONLY be issued for channel with streams set in | |
1021 | * no monitor mode. | |
1022 | */ | |
1023 | assert(!channel->monitor); | |
1024 | ||
1025 | /* | |
1026 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1027 | * monitor mode. | |
1028 | */ | |
1029 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
1030 | ||
1031 | consumer_del_channel(channel); | |
09d3dbc0 | 1032 | end_destroy_channel: |
07b86b52 JD |
1033 | goto end_nosignal; |
1034 | } | |
fb83fe64 JD |
1035 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1036 | { | |
66ab32be JD |
1037 | ssize_t ret; |
1038 | uint64_t count; | |
fb83fe64 JD |
1039 | struct lttng_consumer_channel *channel; |
1040 | uint64_t id = msg.u.discarded_events.session_id; | |
1041 | uint64_t key = msg.u.discarded_events.channel_key; | |
1042 | ||
e5742757 MD |
1043 | DBG("Kernel consumer discarded events command for session id %" |
1044 | PRIu64 ", channel key %" PRIu64, id, key); | |
1045 | ||
fb83fe64 JD |
1046 | channel = consumer_find_channel(key); |
1047 | if (!channel) { | |
1048 | ERR("Kernel consumer discarded events channel %" | |
1049 | PRIu64 " not found", key); | |
66ab32be | 1050 | count = 0; |
e5742757 | 1051 | } else { |
66ab32be | 1052 | count = channel->discarded_events; |
fb83fe64 JD |
1053 | } |
1054 | ||
fb83fe64 JD |
1055 | health_code_update(); |
1056 | ||
1057 | /* Send back returned value to session daemon */ | |
66ab32be | 1058 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1059 | if (ret < 0) { |
1060 | PERROR("send discarded events"); | |
1061 | goto error_fatal; | |
1062 | } | |
1063 | ||
1064 | break; | |
1065 | } | |
1066 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1067 | { | |
66ab32be JD |
1068 | ssize_t ret; |
1069 | uint64_t count; | |
fb83fe64 JD |
1070 | struct lttng_consumer_channel *channel; |
1071 | uint64_t id = msg.u.lost_packets.session_id; | |
1072 | uint64_t key = msg.u.lost_packets.channel_key; | |
1073 | ||
e5742757 MD |
1074 | DBG("Kernel consumer lost packets command for session id %" |
1075 | PRIu64 ", channel key %" PRIu64, id, key); | |
1076 | ||
fb83fe64 JD |
1077 | channel = consumer_find_channel(key); |
1078 | if (!channel) { | |
1079 | ERR("Kernel consumer lost packets channel %" | |
1080 | PRIu64 " not found", key); | |
66ab32be | 1081 | count = 0; |
e5742757 | 1082 | } else { |
66ab32be | 1083 | count = channel->lost_packets; |
fb83fe64 JD |
1084 | } |
1085 | ||
fb83fe64 JD |
1086 | health_code_update(); |
1087 | ||
1088 | /* Send back returned value to session daemon */ | |
66ab32be | 1089 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1090 | if (ret < 0) { |
1091 | PERROR("send lost packets"); | |
1092 | goto error_fatal; | |
1093 | } | |
1094 | ||
1095 | break; | |
1096 | } | |
b3530820 JG |
1097 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1098 | { | |
1099 | int channel_monitor_pipe; | |
1100 | ||
1101 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1102 | /* Successfully received the command's type. */ | |
1103 | ret = consumer_send_status_msg(sock, ret_code); | |
1104 | if (ret < 0) { | |
1105 | goto error_fatal; | |
1106 | } | |
1107 | ||
1108 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, | |
1109 | 1); | |
1110 | if (ret != sizeof(channel_monitor_pipe)) { | |
1111 | ERR("Failed to receive channel monitor pipe"); | |
1112 | goto error_fatal; | |
1113 | } | |
1114 | ||
1115 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
1116 | ret = consumer_timer_thread_set_channel_monitor_pipe( | |
1117 | channel_monitor_pipe); | |
1118 | if (!ret) { | |
1119 | int flags; | |
1120 | ||
1121 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1122 | /* Set the pipe as non-blocking. */ | |
1123 | ret = fcntl(channel_monitor_pipe, F_GETFL, 0); | |
1124 | if (ret == -1) { | |
1125 | PERROR("fcntl get flags of the channel monitoring pipe"); | |
1126 | goto error_fatal; | |
1127 | } | |
1128 | flags = ret; | |
1129 | ||
1130 | ret = fcntl(channel_monitor_pipe, F_SETFL, | |
1131 | flags | O_NONBLOCK); | |
1132 | if (ret == -1) { | |
1133 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); | |
1134 | goto error_fatal; | |
1135 | } | |
1136 | DBG("Channel monitor pipe set as non-blocking"); | |
1137 | } else { | |
1138 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1139 | } | |
1140 | ret = consumer_send_status_msg(sock, ret_code); | |
1141 | if (ret < 0) { | |
1142 | goto error_fatal; | |
1143 | } | |
1144 | break; | |
1145 | } | |
b99a8d42 JD |
1146 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1147 | { | |
e96d66b4 MD |
1148 | struct lttng_consumer_channel *channel; |
1149 | uint64_t key = msg.u.rotate_channel.key; | |
b99a8d42 | 1150 | |
e96d66b4 | 1151 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1152 | |
e96d66b4 MD |
1153 | channel = consumer_find_channel(key); |
1154 | if (!channel) { | |
1155 | ERR("Channel %" PRIu64 " not found", key); | |
1156 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1157 | } else { | |
1158 | /* | |
1159 | * Sample the rotate position of all the streams in this channel. | |
1160 | */ | |
1161 | ret = lttng_consumer_rotate_channel(channel, key, | |
e96d66b4 MD |
1162 | msg.u.rotate_channel.relayd_id, |
1163 | msg.u.rotate_channel.metadata, | |
e96d66b4 MD |
1164 | ctx); |
1165 | if (ret < 0) { | |
1166 | ERR("Rotate channel failed"); | |
1167 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1168 | } | |
b99a8d42 | 1169 | |
e96d66b4 MD |
1170 | health_code_update(); |
1171 | } | |
b99a8d42 JD |
1172 | ret = consumer_send_status_msg(sock, ret_code); |
1173 | if (ret < 0) { | |
1174 | /* Somehow, the session daemon is not responding anymore. */ | |
812e4d26 | 1175 | goto error_rotate_channel; |
b99a8d42 | 1176 | } |
e96d66b4 MD |
1177 | if (channel) { |
1178 | /* Rotate the streams that are ready right now. */ | |
1179 | ret = lttng_consumer_rotate_ready_streams( | |
1180 | channel, key, ctx); | |
1181 | if (ret < 0) { | |
1182 | ERR("Rotate ready streams failed"); | |
1183 | } | |
b99a8d42 | 1184 | } |
b99a8d42 | 1185 | break; |
812e4d26 JG |
1186 | error_rotate_channel: |
1187 | goto end_nosignal; | |
b99a8d42 | 1188 | } |
e5148e25 | 1189 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1190 | { |
e5148e25 JG |
1191 | ret_code = lttng_consumer_init_command(ctx, |
1192 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1193 | health_code_update(); |
00fb02ac JD |
1194 | ret = consumer_send_status_msg(sock, ret_code); |
1195 | if (ret < 0) { | |
1196 | /* Somehow, the session daemon is not responding anymore. */ | |
1197 | goto end_nosignal; | |
1198 | } | |
1199 | break; | |
1200 | } | |
e5148e25 | 1201 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1202 | { |
e5148e25 | 1203 | const struct lttng_credentials credentials = { |
0ebdafe0 JG |
1204 | .uid = msg.u.create_trace_chunk.credentials.value.uid, |
1205 | .gid = msg.u.create_trace_chunk.credentials.value.gid, | |
e5148e25 JG |
1206 | }; |
1207 | const bool is_local_trace = | |
1208 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1209 | const uint64_t relayd_id = | |
1210 | msg.u.create_trace_chunk.relayd_id.value; | |
1211 | const char *chunk_override_name = | |
1212 | *msg.u.create_trace_chunk.override_name ? | |
1213 | msg.u.create_trace_chunk.override_name : | |
1214 | NULL; | |
1215 | LTTNG_OPTIONAL(struct lttng_directory_handle) chunk_directory_handle = | |
1216 | LTTNG_OPTIONAL_INIT; | |
d88744a4 | 1217 | |
e5148e25 JG |
1218 | /* |
1219 | * The session daemon will only provide a chunk directory file | |
1220 | * descriptor for local traces. | |
1221 | */ | |
1222 | if (is_local_trace) { | |
1223 | int chunk_dirfd; | |
19990ed5 | 1224 | |
e5148e25 JG |
1225 | /* Acnowledge the reception of the command. */ |
1226 | ret = consumer_send_status_msg(sock, | |
1227 | LTTCOMM_CONSUMERD_SUCCESS); | |
1228 | if (ret < 0) { | |
1229 | /* Somehow, the session daemon is not responding anymore. */ | |
1230 | goto end_nosignal; | |
1231 | } | |
82528808 | 1232 | |
e5148e25 JG |
1233 | ret = lttcomm_recv_fds_unix_sock(sock, &chunk_dirfd, 1); |
1234 | if (ret != sizeof(chunk_dirfd)) { | |
1235 | ERR("Failed to receive trace chunk directory file descriptor"); | |
1236 | goto error_fatal; | |
1237 | } | |
82528808 | 1238 | |
e5148e25 JG |
1239 | DBG("Received trace chunk directory fd (%d)", |
1240 | chunk_dirfd); | |
1241 | ret = lttng_directory_handle_init_from_dirfd( | |
1242 | &chunk_directory_handle.value, | |
1243 | chunk_dirfd); | |
1244 | if (ret) { | |
1245 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); | |
1246 | if (close(chunk_dirfd)) { | |
1247 | PERROR("Failed to close chunk directory file descriptor"); | |
1248 | } | |
1249 | goto error_fatal; | |
1250 | } | |
1251 | chunk_directory_handle.is_set = true; | |
82528808 JG |
1252 | } |
1253 | ||
e5148e25 JG |
1254 | ret_code = lttng_consumer_create_trace_chunk( |
1255 | !is_local_trace ? &relayd_id : NULL, | |
1256 | msg.u.create_trace_chunk.session_id, | |
1257 | msg.u.create_trace_chunk.chunk_id, | |
0ebdafe0 JG |
1258 | (time_t) msg.u.create_trace_chunk |
1259 | .creation_timestamp, | |
e5148e25 | 1260 | chunk_override_name, |
0ebdafe0 JG |
1261 | msg.u.create_trace_chunk.credentials.is_set ? |
1262 | &credentials : | |
1263 | NULL, | |
e5148e25 JG |
1264 | chunk_directory_handle.is_set ? |
1265 | &chunk_directory_handle.value : | |
1266 | NULL); | |
82528808 | 1267 | |
e5148e25 JG |
1268 | if (chunk_directory_handle.is_set) { |
1269 | lttng_directory_handle_fini( | |
1270 | &chunk_directory_handle.value); | |
d88744a4 | 1271 | } |
e5148e25 | 1272 | goto end_msg_sessiond; |
d88744a4 | 1273 | } |
e5148e25 | 1274 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1275 | { |
6bbcff33 JG |
1276 | enum lttng_trace_chunk_command_type close_command = |
1277 | msg.u.close_trace_chunk.close_command.value; | |
e5148e25 JG |
1278 | const uint64_t relayd_id = |
1279 | msg.u.close_trace_chunk.relayd_id.value; | |
41b23598 MD |
1280 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1281 | char path[LTTNG_PATH_MAX]; | |
e5148e25 JG |
1282 | |
1283 | ret_code = lttng_consumer_close_trace_chunk( | |
1284 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
6bbcff33 JG |
1285 | &relayd_id : |
1286 | NULL, | |
e5148e25 JG |
1287 | msg.u.close_trace_chunk.session_id, |
1288 | msg.u.close_trace_chunk.chunk_id, | |
6bbcff33 JG |
1289 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1290 | msg.u.close_trace_chunk.close_command.is_set ? | |
1291 | &close_command : | |
41b23598 MD |
1292 | NULL, path); |
1293 | reply.ret_code = ret_code; | |
1294 | reply.path_length = strlen(path) + 1; | |
1295 | ret = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1296 | if (ret != sizeof(reply)) { | |
1297 | goto error_fatal; | |
1298 | } | |
1299 | ret = lttcomm_send_unix_sock(sock, path, reply.path_length); | |
1300 | if (ret != reply.path_length) { | |
1301 | goto error_fatal; | |
1302 | } | |
1303 | goto end_nosignal; | |
fc181d72 | 1304 | } |
e5148e25 | 1305 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
fc181d72 | 1306 | { |
e5148e25 JG |
1307 | const uint64_t relayd_id = |
1308 | msg.u.trace_chunk_exists.relayd_id.value; | |
1309 | ||
1310 | ret_code = lttng_consumer_trace_chunk_exists( | |
1311 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1312 | &relayd_id : NULL, | |
1313 | msg.u.trace_chunk_exists.session_id, | |
1314 | msg.u.trace_chunk_exists.chunk_id); | |
1315 | goto end_msg_sessiond; | |
a1ae2ea5 | 1316 | } |
3bd1e081 | 1317 | default: |
3f8e211f | 1318 | goto end_nosignal; |
3bd1e081 | 1319 | } |
3f8e211f | 1320 | |
3bd1e081 | 1321 | end_nosignal: |
4cbc1a04 DG |
1322 | /* |
1323 | * Return 1 to indicate success since the 0 value can be a socket | |
1324 | * shutdown during the recv() or send() call. | |
1325 | */ | |
e0e7757d JG |
1326 | ret = 1; |
1327 | goto end; | |
1328 | error_fatal: | |
1329 | /* This will issue a consumer stop. */ | |
1330 | ret = -1; | |
1331 | goto end; | |
e5148e25 JG |
1332 | end_msg_sessiond: |
1333 | /* | |
1334 | * The returned value here is not useful since either way we'll return 1 to | |
1335 | * the caller because the session daemon socket management is done | |
1336 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1337 | */ | |
1338 | ret = consumer_send_status_msg(sock, ret_code); | |
1339 | if (ret < 0) { | |
1340 | goto error_fatal; | |
1341 | } | |
e0e7757d JG |
1342 | ret = 1; |
1343 | end: | |
e5148e25 | 1344 | health_code_update(); |
1803a064 | 1345 | rcu_read_unlock(); |
e0e7757d | 1346 | return ret; |
3bd1e081 | 1347 | } |
d41f73b7 | 1348 | |
309167d2 JD |
1349 | /* |
1350 | * Populate index values of a kernel stream. Values are set in big endian order. | |
1351 | * | |
1352 | * Return 0 on success or else a negative value. | |
1353 | */ | |
50adc264 | 1354 | static int get_index_values(struct ctf_packet_index *index, int infd) |
309167d2 JD |
1355 | { |
1356 | int ret; | |
641e8873 JG |
1357 | uint64_t packet_size, content_size, timestamp_begin, timestamp_end, |
1358 | events_discarded, stream_id, stream_instance_id, | |
1359 | packet_seq_num; | |
309167d2 | 1360 | |
641e8873 | 1361 | ret = kernctl_get_timestamp_begin(infd, ×tamp_begin); |
309167d2 JD |
1362 | if (ret < 0) { |
1363 | PERROR("kernctl_get_timestamp_begin"); | |
1364 | goto error; | |
1365 | } | |
309167d2 | 1366 | |
641e8873 | 1367 | ret = kernctl_get_timestamp_end(infd, ×tamp_end); |
309167d2 JD |
1368 | if (ret < 0) { |
1369 | PERROR("kernctl_get_timestamp_end"); | |
1370 | goto error; | |
1371 | } | |
309167d2 | 1372 | |
641e8873 | 1373 | ret = kernctl_get_events_discarded(infd, &events_discarded); |
309167d2 JD |
1374 | if (ret < 0) { |
1375 | PERROR("kernctl_get_events_discarded"); | |
1376 | goto error; | |
1377 | } | |
309167d2 | 1378 | |
641e8873 | 1379 | ret = kernctl_get_content_size(infd, &content_size); |
309167d2 JD |
1380 | if (ret < 0) { |
1381 | PERROR("kernctl_get_content_size"); | |
1382 | goto error; | |
1383 | } | |
309167d2 | 1384 | |
641e8873 | 1385 | ret = kernctl_get_packet_size(infd, &packet_size); |
309167d2 JD |
1386 | if (ret < 0) { |
1387 | PERROR("kernctl_get_packet_size"); | |
1388 | goto error; | |
1389 | } | |
309167d2 | 1390 | |
641e8873 | 1391 | ret = kernctl_get_stream_id(infd, &stream_id); |
309167d2 JD |
1392 | if (ret < 0) { |
1393 | PERROR("kernctl_get_stream_id"); | |
1394 | goto error; | |
1395 | } | |
309167d2 | 1396 | |
641e8873 | 1397 | ret = kernctl_get_instance_id(infd, &stream_instance_id); |
234cd636 | 1398 | if (ret < 0) { |
f0b03c22 MD |
1399 | if (ret == -ENOTTY) { |
1400 | /* Command not implemented by lttng-modules. */ | |
641e8873 | 1401 | stream_instance_id = -1ULL; |
f0b03c22 MD |
1402 | } else { |
1403 | PERROR("kernctl_get_instance_id"); | |
1404 | goto error; | |
1405 | } | |
234cd636 | 1406 | } |
234cd636 | 1407 | |
641e8873 | 1408 | ret = kernctl_get_sequence_number(infd, &packet_seq_num); |
234cd636 | 1409 | if (ret < 0) { |
f0b03c22 MD |
1410 | if (ret == -ENOTTY) { |
1411 | /* Command not implemented by lttng-modules. */ | |
641e8873 | 1412 | packet_seq_num = -1ULL; |
f0b03c22 MD |
1413 | ret = 0; |
1414 | } else { | |
1415 | PERROR("kernctl_get_sequence_number"); | |
1416 | goto error; | |
1417 | } | |
234cd636 JD |
1418 | } |
1419 | index->packet_seq_num = htobe64(index->packet_seq_num); | |
1420 | ||
641e8873 JG |
1421 | *index = (typeof(*index)) { |
1422 | .offset = index->offset, | |
1423 | .packet_size = htobe64(packet_size), | |
1424 | .content_size = htobe64(content_size), | |
1425 | .timestamp_begin = htobe64(timestamp_begin), | |
1426 | .timestamp_end = htobe64(timestamp_end), | |
1427 | .events_discarded = htobe64(events_discarded), | |
1428 | .stream_id = htobe64(stream_id), | |
1429 | .stream_instance_id = htobe64(stream_instance_id), | |
1430 | .packet_seq_num = htobe64(packet_seq_num), | |
1431 | }; | |
1432 | ||
309167d2 JD |
1433 | error: |
1434 | return ret; | |
1435 | } | |
94d49140 JD |
1436 | /* |
1437 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1438 | * metadata thread can consumer them. | |
1439 | * | |
1440 | * Metadata stream lock MUST be acquired. | |
1441 | * | |
1442 | * Return 0 if new metadatda is available, EAGAIN if the metadata stream | |
1443 | * is empty or a negative value on error. | |
1444 | */ | |
1445 | int lttng_kconsumer_sync_metadata(struct lttng_consumer_stream *metadata) | |
1446 | { | |
1447 | int ret; | |
1448 | ||
1449 | assert(metadata); | |
1450 | ||
1451 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1452 | if (ret < 0) { | |
1453 | ERR("Failed to flush kernel stream"); | |
1454 | goto end; | |
1455 | } | |
1456 | ||
1457 | ret = kernctl_snapshot(metadata->wait_fd); | |
1458 | if (ret < 0) { | |
32af2c95 | 1459 | if (ret != -EAGAIN) { |
94d49140 JD |
1460 | ERR("Sync metadata, taking kernel snapshot failed."); |
1461 | goto end; | |
1462 | } | |
1463 | DBG("Sync metadata, no new kernel metadata"); | |
1464 | /* No new metadata, exit. */ | |
1465 | ret = ENODATA; | |
1466 | goto end; | |
1467 | } | |
1468 | ||
1469 | end: | |
1470 | return ret; | |
1471 | } | |
309167d2 | 1472 | |
fb83fe64 JD |
1473 | static |
1474 | int update_stream_stats(struct lttng_consumer_stream *stream) | |
1475 | { | |
1476 | int ret; | |
1477 | uint64_t seq, discarded; | |
1478 | ||
1479 | ret = kernctl_get_sequence_number(stream->wait_fd, &seq); | |
1480 | if (ret < 0) { | |
f0b03c22 MD |
1481 | if (ret == -ENOTTY) { |
1482 | /* Command not implemented by lttng-modules. */ | |
1483 | seq = -1ULL; | |
c8eabe73 | 1484 | stream->sequence_number_unavailable = true; |
f0b03c22 MD |
1485 | } else { |
1486 | PERROR("kernctl_get_sequence_number"); | |
1487 | goto end; | |
1488 | } | |
fb83fe64 JD |
1489 | } |
1490 | ||
1491 | /* | |
1492 | * Start the sequence when we extract the first packet in case we don't | |
1493 | * start at 0 (for example if a consumer is not connected to the | |
1494 | * session immediately after the beginning). | |
1495 | */ | |
1496 | if (stream->last_sequence_number == -1ULL) { | |
1497 | stream->last_sequence_number = seq; | |
1498 | } else if (seq > stream->last_sequence_number) { | |
1499 | stream->chan->lost_packets += seq - | |
1500 | stream->last_sequence_number - 1; | |
1501 | } else { | |
1502 | /* seq <= last_sequence_number */ | |
1503 | ERR("Sequence number inconsistent : prev = %" PRIu64 | |
1504 | ", current = %" PRIu64, | |
1505 | stream->last_sequence_number, seq); | |
1506 | ret = -1; | |
1507 | goto end; | |
1508 | } | |
1509 | stream->last_sequence_number = seq; | |
1510 | ||
1511 | ret = kernctl_get_events_discarded(stream->wait_fd, &discarded); | |
1512 | if (ret < 0) { | |
1513 | PERROR("kernctl_get_events_discarded"); | |
1514 | goto end; | |
1515 | } | |
1516 | if (discarded < stream->last_discarded_events) { | |
1517 | /* | |
83f4233d MJ |
1518 | * Overflow has occurred. We assume only one wrap-around |
1519 | * has occurred. | |
fb83fe64 JD |
1520 | */ |
1521 | stream->chan->discarded_events += (1ULL << (CAA_BITS_PER_LONG - 1)) - | |
1522 | stream->last_discarded_events + discarded; | |
1523 | } else { | |
1524 | stream->chan->discarded_events += discarded - | |
1525 | stream->last_discarded_events; | |
1526 | } | |
1527 | stream->last_discarded_events = discarded; | |
1528 | ret = 0; | |
1529 | ||
1530 | end: | |
1531 | return ret; | |
1532 | } | |
1533 | ||
93ec662e JD |
1534 | /* |
1535 | * Check if the local version of the metadata stream matches with the version | |
1536 | * of the metadata stream in the kernel. If it was updated, set the reset flag | |
1537 | * on the stream. | |
1538 | */ | |
1539 | static | |
1540 | int metadata_stream_check_version(int infd, struct lttng_consumer_stream *stream) | |
1541 | { | |
1542 | int ret; | |
1543 | uint64_t cur_version; | |
1544 | ||
1545 | ret = kernctl_get_metadata_version(infd, &cur_version); | |
1546 | if (ret < 0) { | |
f0b03c22 MD |
1547 | if (ret == -ENOTTY) { |
1548 | /* | |
1549 | * LTTng-modules does not implement this | |
1550 | * command. | |
1551 | */ | |
1552 | ret = 0; | |
1553 | goto end; | |
1554 | } | |
93ec662e JD |
1555 | ERR("Failed to get the metadata version"); |
1556 | goto end; | |
1557 | } | |
1558 | ||
1559 | if (stream->metadata_version == cur_version) { | |
1560 | ret = 0; | |
1561 | goto end; | |
1562 | } | |
1563 | ||
1564 | DBG("New metadata version detected"); | |
1565 | stream->metadata_version = cur_version; | |
1566 | stream->reset_metadata_flag = 1; | |
1567 | ret = 0; | |
1568 | ||
1569 | end: | |
1570 | return ret; | |
1571 | } | |
1572 | ||
d41f73b7 MD |
1573 | /* |
1574 | * Consume data on a file descriptor and write it on a trace file. | |
e5148e25 | 1575 | * The stream and channel locks must be held by the caller. |
d41f73b7 | 1576 | */ |
4078b776 | 1577 | ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
e5148e25 | 1578 | struct lttng_consumer_local_data *ctx) |
d41f73b7 | 1579 | { |
1d4dfdef | 1580 | unsigned long len, subbuf_size, padding; |
02d02e31 | 1581 | int err, write_index = 1, rotation_ret; |
4078b776 | 1582 | ssize_t ret = 0; |
d41f73b7 | 1583 | int infd = stream->wait_fd; |
b2d8a465 | 1584 | struct ctf_packet_index index = {}; |
d41f73b7 MD |
1585 | |
1586 | DBG("In read_subbuffer (infd : %d)", infd); | |
309167d2 | 1587 | |
02d02e31 JD |
1588 | /* |
1589 | * If the stream was flagged to be ready for rotation before we extract the | |
1590 | * next packet, rotate it now. | |
1591 | */ | |
1592 | if (stream->rotate_ready) { | |
1593 | DBG("Rotate stream before extracting data"); | |
e5148e25 | 1594 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream); |
02d02e31 JD |
1595 | if (rotation_ret < 0) { |
1596 | ERR("Stream rotation error"); | |
1597 | ret = -1; | |
1598 | goto error; | |
1599 | } | |
1600 | } | |
1601 | ||
d41f73b7 MD |
1602 | /* Get the next subbuffer */ |
1603 | err = kernctl_get_next_subbuf(infd); | |
1604 | if (err != 0) { | |
d41f73b7 MD |
1605 | /* |
1606 | * This is a debug message even for single-threaded consumer, | |
1607 | * because poll() have more relaxed criterions than get subbuf, | |
1608 | * so get_subbuf may fail for short race windows where poll() | |
1609 | * would issue wakeups. | |
1610 | */ | |
1611 | DBG("Reserving sub buffer failed (everything is normal, " | |
1612 | "it is due to concurrency)"); | |
32af2c95 | 1613 | ret = err; |
02d02e31 | 1614 | goto error; |
d41f73b7 MD |
1615 | } |
1616 | ||
1d4dfdef DG |
1617 | /* Get the full subbuffer size including padding */ |
1618 | err = kernctl_get_padded_subbuf_size(infd, &len); | |
1619 | if (err != 0) { | |
5a510c9f | 1620 | PERROR("Getting sub-buffer len failed."); |
8265f19e MD |
1621 | err = kernctl_put_subbuf(infd); |
1622 | if (err != 0) { | |
32af2c95 | 1623 | if (err == -EFAULT) { |
5a510c9f | 1624 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1625 | } else if (err == -EIO) { |
8265f19e | 1626 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1627 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1628 | } |
32af2c95 | 1629 | ret = err; |
02d02e31 | 1630 | goto error; |
8265f19e | 1631 | } |
32af2c95 | 1632 | ret = err; |
02d02e31 | 1633 | goto error; |
1d4dfdef DG |
1634 | } |
1635 | ||
1c20f0e2 | 1636 | if (!stream->metadata_flag) { |
309167d2 JD |
1637 | ret = get_index_values(&index, infd); |
1638 | if (ret < 0) { | |
8265f19e MD |
1639 | err = kernctl_put_subbuf(infd); |
1640 | if (err != 0) { | |
32af2c95 | 1641 | if (err == -EFAULT) { |
5a510c9f | 1642 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1643 | } else if (err == -EIO) { |
8265f19e | 1644 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1645 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1646 | } |
32af2c95 | 1647 | ret = err; |
02d02e31 | 1648 | goto error; |
8265f19e | 1649 | } |
02d02e31 | 1650 | goto error; |
309167d2 | 1651 | } |
fb83fe64 JD |
1652 | ret = update_stream_stats(stream); |
1653 | if (ret < 0) { | |
7b87473d MD |
1654 | err = kernctl_put_subbuf(infd); |
1655 | if (err != 0) { | |
1656 | if (err == -EFAULT) { | |
1657 | PERROR("Error in unreserving sub buffer\n"); | |
1658 | } else if (err == -EIO) { | |
1659 | /* Should never happen with newer LTTng versions */ | |
1660 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); | |
1661 | } | |
1662 | ret = err; | |
02d02e31 | 1663 | goto error; |
7b87473d | 1664 | } |
02d02e31 | 1665 | goto error; |
fb83fe64 | 1666 | } |
1c20f0e2 JD |
1667 | } else { |
1668 | write_index = 0; | |
93ec662e JD |
1669 | ret = metadata_stream_check_version(infd, stream); |
1670 | if (ret < 0) { | |
7b87473d MD |
1671 | err = kernctl_put_subbuf(infd); |
1672 | if (err != 0) { | |
1673 | if (err == -EFAULT) { | |
1674 | PERROR("Error in unreserving sub buffer\n"); | |
1675 | } else if (err == -EIO) { | |
1676 | /* Should never happen with newer LTTng versions */ | |
1677 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); | |
1678 | } | |
1679 | ret = err; | |
02d02e31 | 1680 | goto error; |
7b87473d | 1681 | } |
02d02e31 | 1682 | goto error; |
93ec662e | 1683 | } |
309167d2 JD |
1684 | } |
1685 | ||
ffe60014 | 1686 | switch (stream->chan->output) { |
07b86b52 | 1687 | case CONSUMER_CHANNEL_SPLICE: |
1d4dfdef DG |
1688 | /* |
1689 | * XXX: The lttng-modules splice "actor" does not handle copying | |
1690 | * partial pages hence only using the subbuffer size without the | |
1691 | * padding makes the splice fail. | |
1692 | */ | |
1693 | subbuf_size = len; | |
1694 | padding = 0; | |
1695 | ||
1696 | /* splice the subbuffer to the tracefile */ | |
91dfef6e | 1697 | ret = lttng_consumer_on_read_subbuffer_splice(ctx, stream, subbuf_size, |
309167d2 | 1698 | padding, &index); |
91dfef6e DG |
1699 | /* |
1700 | * XXX: Splice does not support network streaming so the return value | |
1701 | * is simply checked against subbuf_size and not like the mmap() op. | |
1702 | */ | |
1d4dfdef DG |
1703 | if (ret != subbuf_size) { |
1704 | /* | |
1705 | * display the error but continue processing to try | |
1706 | * to release the subbuffer | |
1707 | */ | |
1708 | ERR("Error splicing to tracefile (ret: %zd != len: %lu)", | |
1709 | ret, subbuf_size); | |
309167d2 | 1710 | write_index = 0; |
1d4dfdef DG |
1711 | } |
1712 | break; | |
07b86b52 | 1713 | case CONSUMER_CHANNEL_MMAP: |
7775df52 JG |
1714 | { |
1715 | const char *subbuf_addr; | |
1716 | ||
1d4dfdef DG |
1717 | /* Get subbuffer size without padding */ |
1718 | err = kernctl_get_subbuf_size(infd, &subbuf_size); | |
1719 | if (err != 0) { | |
5a510c9f | 1720 | PERROR("Getting sub-buffer len failed."); |
8265f19e MD |
1721 | err = kernctl_put_subbuf(infd); |
1722 | if (err != 0) { | |
32af2c95 | 1723 | if (err == -EFAULT) { |
5a510c9f | 1724 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1725 | } else if (err == -EIO) { |
8265f19e | 1726 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1727 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1728 | } |
32af2c95 | 1729 | ret = err; |
02d02e31 | 1730 | goto error; |
8265f19e | 1731 | } |
32af2c95 | 1732 | ret = err; |
02d02e31 | 1733 | goto error; |
1d4dfdef | 1734 | } |
47e81c02 | 1735 | |
7775df52 JG |
1736 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
1737 | if (ret) { | |
1738 | goto error_put_subbuf; | |
1739 | } | |
1740 | ||
1d4dfdef DG |
1741 | /* Make sure the tracer is not gone mad on us! */ |
1742 | assert(len >= subbuf_size); | |
1743 | ||
1744 | padding = len - subbuf_size; | |
1745 | ||
1746 | /* write the subbuffer to the tracefile */ | |
7775df52 JG |
1747 | ret = lttng_consumer_on_read_subbuffer_mmap(ctx, stream, |
1748 | subbuf_addr, | |
1749 | subbuf_size, | |
309167d2 | 1750 | padding, &index); |
91dfef6e DG |
1751 | /* |
1752 | * The mmap operation should write subbuf_size amount of data when | |
1753 | * network streaming or the full padding (len) size when we are _not_ | |
1754 | * streaming. | |
1755 | */ | |
d88aee68 DG |
1756 | if ((ret != subbuf_size && stream->net_seq_idx != (uint64_t) -1ULL) || |
1757 | (ret != len && stream->net_seq_idx == (uint64_t) -1ULL)) { | |
1d4dfdef | 1758 | /* |
91dfef6e | 1759 | * Display the error but continue processing to try to release the |
2336629e DG |
1760 | * subbuffer. This is a DBG statement since this is possible to |
1761 | * happen without being a critical error. | |
1d4dfdef | 1762 | */ |
2336629e | 1763 | DBG("Error writing to tracefile " |
91dfef6e DG |
1764 | "(ret: %zd != len: %lu != subbuf_size: %lu)", |
1765 | ret, len, subbuf_size); | |
309167d2 | 1766 | write_index = 0; |
1d4dfdef DG |
1767 | } |
1768 | break; | |
7775df52 | 1769 | } |
1d4dfdef DG |
1770 | default: |
1771 | ERR("Unknown output method"); | |
56591bac | 1772 | ret = -EPERM; |
d41f73b7 | 1773 | } |
7775df52 | 1774 | error_put_subbuf: |
d41f73b7 MD |
1775 | err = kernctl_put_next_subbuf(infd); |
1776 | if (err != 0) { | |
32af2c95 | 1777 | if (err == -EFAULT) { |
5a510c9f | 1778 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1779 | } else if (err == -EIO) { |
d41f73b7 | 1780 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1781 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
d41f73b7 | 1782 | } |
32af2c95 | 1783 | ret = err; |
02d02e31 | 1784 | goto error; |
d41f73b7 MD |
1785 | } |
1786 | ||
309167d2 | 1787 | /* Write index if needed. */ |
1c20f0e2 | 1788 | if (!write_index) { |
02d02e31 | 1789 | goto rotate; |
1c20f0e2 JD |
1790 | } |
1791 | ||
94d49140 JD |
1792 | if (stream->chan->live_timer_interval && !stream->metadata_flag) { |
1793 | /* | |
1794 | * In live, block until all the metadata is sent. | |
1795 | */ | |
c585821b MD |
1796 | pthread_mutex_lock(&stream->metadata_timer_lock); |
1797 | assert(!stream->missed_metadata_flush); | |
1798 | stream->waiting_on_metadata = true; | |
1799 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1800 | ||
94d49140 | 1801 | err = consumer_stream_sync_metadata(ctx, stream->session_id); |
c585821b MD |
1802 | |
1803 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
1804 | stream->waiting_on_metadata = false; | |
1805 | if (stream->missed_metadata_flush) { | |
1806 | stream->missed_metadata_flush = false; | |
1807 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1808 | (void) consumer_flush_kernel_index(stream); | |
1809 | } else { | |
1810 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1811 | } | |
94d49140 | 1812 | if (err < 0) { |
02d02e31 | 1813 | goto error; |
94d49140 JD |
1814 | } |
1815 | } | |
1816 | ||
1c20f0e2 JD |
1817 | err = consumer_stream_write_index(stream, &index); |
1818 | if (err < 0) { | |
02d02e31 | 1819 | goto error; |
309167d2 JD |
1820 | } |
1821 | ||
02d02e31 JD |
1822 | rotate: |
1823 | /* | |
1824 | * After extracting the packet, we check if the stream is now ready to be | |
1825 | * rotated and perform the action immediately. | |
1826 | */ | |
1827 | rotation_ret = lttng_consumer_stream_is_rotate_ready(stream); | |
1828 | if (rotation_ret == 1) { | |
e5148e25 | 1829 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream); |
02d02e31 JD |
1830 | if (rotation_ret < 0) { |
1831 | ERR("Stream rotation error"); | |
1832 | ret = -1; | |
1833 | goto error; | |
1834 | } | |
1835 | } else if (rotation_ret < 0) { | |
1836 | ERR("Checking if stream is ready to rotate"); | |
1837 | ret = -1; | |
1838 | goto error; | |
1839 | } | |
1840 | ||
1841 | error: | |
d41f73b7 MD |
1842 | return ret; |
1843 | } | |
1844 | ||
1845 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1846 | { | |
1847 | int ret; | |
ffe60014 DG |
1848 | |
1849 | assert(stream); | |
1850 | ||
2bba9e53 | 1851 | /* |
e5148e25 JG |
1852 | * Don't create anything if this is set for streaming or if there is |
1853 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1854 | */ |
e5148e25 JG |
1855 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1856 | stream->chan->trace_chunk) { | |
1857 | ret = consumer_stream_create_output_files(stream, true); | |
1858 | if (ret) { | |
fe4477ee JD |
1859 | goto error; |
1860 | } | |
ffe60014 | 1861 | } |
d41f73b7 | 1862 | |
d41f73b7 MD |
1863 | if (stream->output == LTTNG_EVENT_MMAP) { |
1864 | /* get the len of the mmap region */ | |
1865 | unsigned long mmap_len; | |
1866 | ||
1867 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1868 | if (ret != 0) { | |
ffe60014 | 1869 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1870 | goto error_close_fd; |
1871 | } | |
1872 | stream->mmap_len = (size_t) mmap_len; | |
1873 | ||
ffe60014 DG |
1874 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1875 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1876 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1877 | PERROR("Error mmaping"); |
d41f73b7 MD |
1878 | ret = -1; |
1879 | goto error_close_fd; | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | /* we return 0 to let the library handle the FD internally */ | |
1884 | return 0; | |
1885 | ||
1886 | error_close_fd: | |
2f225ce2 | 1887 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1888 | int err; |
1889 | ||
1890 | err = close(stream->out_fd); | |
1891 | assert(!err); | |
2f225ce2 | 1892 | stream->out_fd = -1; |
d41f73b7 MD |
1893 | } |
1894 | error: | |
1895 | return ret; | |
1896 | } | |
1897 | ||
ca22feea DG |
1898 | /* |
1899 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1900 | * stream. Consumer data lock MUST be acquired before calling this function |
1901 | * and the stream lock. | |
ca22feea | 1902 | * |
6d805429 | 1903 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1904 | * data is available for trace viewer reading. |
1905 | */ | |
6d805429 | 1906 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1907 | { |
1908 | int ret; | |
1909 | ||
1910 | assert(stream); | |
1911 | ||
873b9e9a MD |
1912 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1913 | ret = 0; | |
1914 | goto end; | |
1915 | } | |
1916 | ||
ca22feea DG |
1917 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1918 | if (ret == 0) { | |
1919 | /* There is still data so let's put back this subbuffer. */ | |
1920 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1921 | assert(ret == 0); | |
6d805429 | 1922 | ret = 1; /* Data is pending */ |
4e9a4686 | 1923 | goto end; |
ca22feea DG |
1924 | } |
1925 | ||
6d805429 DG |
1926 | /* Data is NOT pending and ready to be read. */ |
1927 | ret = 0; | |
ca22feea | 1928 | |
6efae65e DG |
1929 | end: |
1930 | return ret; | |
ca22feea | 1931 | } |