Commit | Line | Data |
---|---|---|
3bd1e081 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3bd1e081 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
3bd1e081 | 7 | * |
3bd1e081 MD |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
3bd1e081 MD |
11 | #include <poll.h> |
12 | #include <pthread.h> | |
13 | #include <stdlib.h> | |
14 | #include <string.h> | |
15 | #include <sys/mman.h> | |
16 | #include <sys/socket.h> | |
17 | #include <sys/types.h> | |
77c7c900 | 18 | #include <inttypes.h> |
3bd1e081 | 19 | #include <unistd.h> |
dbb5dfe6 | 20 | #include <sys/stat.h> |
f5ba75b4 | 21 | #include <stdint.h> |
3bd1e081 | 22 | |
51a9e1c7 | 23 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 24 | #include <common/common.h> |
10a8a223 | 25 | #include <common/kernel-ctl/kernel-ctl.h> |
10a8a223 | 26 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 27 | #include <common/sessiond-comm/relayd.h> |
dbb5dfe6 | 28 | #include <common/compat/fcntl.h> |
f263b7fd | 29 | #include <common/compat/endian.h> |
acdb9057 | 30 | #include <common/pipe.h> |
00e2e675 | 31 | #include <common/relayd/relayd.h> |
fe4477ee | 32 | #include <common/utils.h> |
c8fea79c | 33 | #include <common/consumer/consumer-stream.h> |
309167d2 | 34 | #include <common/index/index.h> |
c8fea79c | 35 | #include <common/consumer/consumer-timer.h> |
d2956687 | 36 | #include <common/optional.h> |
6f9449c2 JG |
37 | #include <common/buffer-view.h> |
38 | #include <common/consumer/consumer.h> | |
f5ba75b4 | 39 | #include <common/consumer/metadata-bucket.h> |
0857097f | 40 | |
10a8a223 | 41 | #include "kernel-consumer.h" |
3bd1e081 | 42 | |
fa29bfbf | 43 | extern struct lttng_consumer_global_data the_consumer_data; |
3bd1e081 | 44 | extern int consumer_poll_timeout; |
3bd1e081 | 45 | |
3bd1e081 MD |
46 | /* |
47 | * Take a snapshot for a specific fd | |
48 | * | |
49 | * Returns 0 on success, < 0 on error | |
50 | */ | |
ffe60014 | 51 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
52 | { |
53 | int ret = 0; | |
54 | int infd = stream->wait_fd; | |
55 | ||
56 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
57 | /* |
58 | * -EAGAIN is not an error, it just means that there is no data to | |
59 | * be read. | |
60 | */ | |
61 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 62 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
63 | } |
64 | ||
65 | return ret; | |
66 | } | |
67 | ||
e9404c27 JG |
68 | /* |
69 | * Sample consumed and produced positions for a specific fd. | |
70 | * | |
71 | * Returns 0 on success, < 0 on error. | |
72 | */ | |
73 | int lttng_kconsumer_sample_snapshot_positions( | |
74 | struct lttng_consumer_stream *stream) | |
75 | { | |
a0377dfe | 76 | LTTNG_ASSERT(stream); |
e9404c27 JG |
77 | |
78 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
79 | } | |
80 | ||
3bd1e081 MD |
81 | /* |
82 | * Get the produced position | |
83 | * | |
84 | * Returns 0 on success, < 0 on error | |
85 | */ | |
ffe60014 | 86 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
87 | unsigned long *pos) |
88 | { | |
89 | int ret; | |
90 | int infd = stream->wait_fd; | |
91 | ||
92 | ret = kernctl_snapshot_get_produced(infd, pos); | |
93 | if (ret != 0) { | |
5a510c9f | 94 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
95 | } |
96 | ||
97 | return ret; | |
98 | } | |
99 | ||
07b86b52 JD |
100 | /* |
101 | * Get the consumerd position | |
102 | * | |
103 | * Returns 0 on success, < 0 on error | |
104 | */ | |
105 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
106 | unsigned long *pos) | |
107 | { | |
108 | int ret; | |
109 | int infd = stream->wait_fd; | |
110 | ||
111 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
112 | if (ret != 0) { | |
5a510c9f | 113 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
114 | } |
115 | ||
116 | return ret; | |
117 | } | |
118 | ||
128708c3 JG |
119 | static |
120 | int get_current_subbuf_addr(struct lttng_consumer_stream *stream, | |
121 | const char **addr) | |
122 | { | |
123 | int ret; | |
124 | unsigned long mmap_offset; | |
97535efa | 125 | const char *mmap_base = (const char *) stream->mmap_base; |
128708c3 JG |
126 | |
127 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
128 | if (ret < 0) { | |
129 | PERROR("Failed to get mmap read offset"); | |
130 | goto error; | |
131 | } | |
132 | ||
133 | *addr = mmap_base + mmap_offset; | |
134 | error: | |
135 | return ret; | |
136 | } | |
137 | ||
07b86b52 JD |
138 | /* |
139 | * Take a snapshot of all the stream of a channel | |
3eb928aa | 140 | * RCU read-side lock must be held across this function to ensure existence of |
947bd097 | 141 | * channel. |
07b86b52 JD |
142 | * |
143 | * Returns 0 on success, < 0 on error | |
144 | */ | |
f72bb42f JG |
145 | static int lttng_kconsumer_snapshot_channel( |
146 | struct lttng_consumer_channel *channel, | |
147 | uint64_t key, char *path, uint64_t relayd_id, | |
148 | uint64_t nb_packets_per_stream, | |
5c786ded | 149 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
150 | { |
151 | int ret; | |
07b86b52 JD |
152 | struct lttng_consumer_stream *stream; |
153 | ||
6a00837f | 154 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 | 155 | |
947bd097 JR |
156 | /* Prevent channel modifications while we perform the snapshot.*/ |
157 | pthread_mutex_lock(&channel->lock); | |
158 | ||
07b86b52 JD |
159 | rcu_read_lock(); |
160 | ||
07b86b52 JD |
161 | /* Splice is not supported yet for channel snapshot. */ |
162 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
9381314c JG |
163 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
164 | channel->name); | |
07b86b52 JD |
165 | ret = -1; |
166 | goto end; | |
167 | } | |
168 | ||
10a50311 | 169 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 170 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
171 | |
172 | health_code_update(); | |
173 | ||
07b86b52 JD |
174 | /* |
175 | * Lock stream because we are about to change its state. | |
176 | */ | |
177 | pthread_mutex_lock(&stream->lock); | |
178 | ||
a0377dfe | 179 | LTTNG_ASSERT(channel->trace_chunk); |
d2956687 JG |
180 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { |
181 | /* | |
182 | * Can't happen barring an internal error as the channel | |
183 | * holds a reference to the trace chunk. | |
184 | */ | |
185 | ERR("Failed to acquire reference to channel's trace chunk"); | |
186 | ret = -1; | |
187 | goto end_unlock; | |
188 | } | |
a0377dfe | 189 | LTTNG_ASSERT(!stream->trace_chunk); |
d2956687 JG |
190 | stream->trace_chunk = channel->trace_chunk; |
191 | ||
29decac3 DG |
192 | /* |
193 | * Assign the received relayd ID so we can use it for streaming. The streams | |
194 | * are not visible to anyone so this is OK to change it. | |
195 | */ | |
07b86b52 JD |
196 | stream->net_seq_idx = relayd_id; |
197 | channel->relayd_id = relayd_id; | |
198 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 199 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
200 | if (ret < 0) { |
201 | ERR("sending stream to relayd"); | |
202 | goto end_unlock; | |
203 | } | |
07b86b52 | 204 | } else { |
d2956687 JG |
205 | ret = consumer_stream_create_output_files(stream, |
206 | false); | |
07b86b52 | 207 | if (ret < 0) { |
07b86b52 JD |
208 | goto end_unlock; |
209 | } | |
d2956687 JG |
210 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
211 | stream->key); | |
07b86b52 JD |
212 | } |
213 | ||
f22dd891 | 214 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 215 | if (ret < 0) { |
f22dd891 MD |
216 | /* |
217 | * Doing a buffer flush which does not take into | |
218 | * account empty packets. This is not perfect | |
219 | * for stream intersection, but required as a | |
220 | * fall-back when "flush_empty" is not | |
221 | * implemented by lttng-modules. | |
222 | */ | |
223 | ret = kernctl_buffer_flush(stream->wait_fd); | |
224 | if (ret < 0) { | |
225 | ERR("Failed to flush kernel stream"); | |
226 | goto end_unlock; | |
227 | } | |
07b86b52 JD |
228 | goto end_unlock; |
229 | } | |
230 | ||
231 | ret = lttng_kconsumer_take_snapshot(stream); | |
232 | if (ret < 0) { | |
233 | ERR("Taking kernel snapshot"); | |
234 | goto end_unlock; | |
235 | } | |
236 | ||
237 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
238 | if (ret < 0) { | |
239 | ERR("Produced kernel snapshot position"); | |
240 | goto end_unlock; | |
241 | } | |
242 | ||
243 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
244 | if (ret < 0) { | |
245 | ERR("Consumerd kernel snapshot position"); | |
246 | goto end_unlock; | |
247 | } | |
248 | ||
d07ceecd MD |
249 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
250 | produced_pos, nb_packets_per_stream, | |
251 | stream->max_sb_size); | |
5c786ded | 252 | |
9377d830 | 253 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
254 | ssize_t read_len; |
255 | unsigned long len, padded_len; | |
128708c3 | 256 | const char *subbuf_addr; |
fd424d99 | 257 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 258 | |
9ce5646a | 259 | health_code_update(); |
07b86b52 JD |
260 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
261 | ||
262 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
263 | if (ret < 0) { | |
32af2c95 | 264 | if (ret != -EAGAIN) { |
07b86b52 JD |
265 | PERROR("kernctl_get_subbuf snapshot"); |
266 | goto end_unlock; | |
267 | } | |
268 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
269 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 270 | stream->chan->lost_packets++; |
07b86b52 JD |
271 | continue; |
272 | } | |
273 | ||
274 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
275 | if (ret < 0) { | |
276 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 277 | goto error_put_subbuf; |
07b86b52 JD |
278 | } |
279 | ||
280 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
281 | if (ret < 0) { | |
282 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 283 | goto error_put_subbuf; |
07b86b52 JD |
284 | } |
285 | ||
128708c3 JG |
286 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
287 | if (ret) { | |
288 | goto error_put_subbuf; | |
289 | } | |
290 | ||
fd424d99 JG |
291 | subbuf_view = lttng_buffer_view_init( |
292 | subbuf_addr, 0, padded_len); | |
f5ba75b4 | 293 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
fd424d99 | 294 | stream, &subbuf_view, |
6f9449c2 | 295 | padded_len - len); |
07b86b52 | 296 | /* |
29decac3 DG |
297 | * We write the padded len in local tracefiles but the data len |
298 | * when using a relay. Display the error but continue processing | |
299 | * to try to release the subbuffer. | |
07b86b52 JD |
300 | */ |
301 | if (relayd_id != (uint64_t) -1ULL) { | |
302 | if (read_len != len) { | |
303 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
304 | read_len, len); | |
305 | } | |
306 | } else { | |
307 | if (read_len != padded_len) { | |
308 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
309 | read_len, padded_len); | |
310 | } | |
311 | } | |
312 | ||
313 | ret = kernctl_put_subbuf(stream->wait_fd); | |
314 | if (ret < 0) { | |
315 | ERR("Snapshot kernctl_put_subbuf"); | |
316 | goto end_unlock; | |
317 | } | |
318 | consumed_pos += stream->max_sb_size; | |
319 | } | |
320 | ||
321 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
322 | if (stream->out_fd >= 0) { |
323 | ret = close(stream->out_fd); | |
324 | if (ret < 0) { | |
325 | PERROR("Kernel consumer snapshot close out_fd"); | |
326 | goto end_unlock; | |
327 | } | |
328 | stream->out_fd = -1; | |
07b86b52 | 329 | } |
07b86b52 JD |
330 | } else { |
331 | close_relayd_stream(stream); | |
332 | stream->net_seq_idx = (uint64_t) -1ULL; | |
333 | } | |
d2956687 JG |
334 | lttng_trace_chunk_put(stream->trace_chunk); |
335 | stream->trace_chunk = NULL; | |
07b86b52 JD |
336 | pthread_mutex_unlock(&stream->lock); |
337 | } | |
338 | ||
339 | /* All good! */ | |
340 | ret = 0; | |
341 | goto end; | |
342 | ||
29decac3 DG |
343 | error_put_subbuf: |
344 | ret = kernctl_put_subbuf(stream->wait_fd); | |
345 | if (ret < 0) { | |
346 | ERR("Snapshot kernctl_put_subbuf error path"); | |
347 | } | |
07b86b52 JD |
348 | end_unlock: |
349 | pthread_mutex_unlock(&stream->lock); | |
350 | end: | |
351 | rcu_read_unlock(); | |
947bd097 | 352 | pthread_mutex_unlock(&channel->lock); |
07b86b52 JD |
353 | return ret; |
354 | } | |
355 | ||
356 | /* | |
357 | * Read the whole metadata available for a snapshot. | |
3eb928aa | 358 | * RCU read-side lock must be held across this function to ensure existence of |
947bd097 | 359 | * metadata_channel. |
07b86b52 JD |
360 | * |
361 | * Returns 0 on success, < 0 on error | |
362 | */ | |
d2956687 JG |
363 | static int lttng_kconsumer_snapshot_metadata( |
364 | struct lttng_consumer_channel *metadata_channel, | |
3eb928aa MD |
365 | uint64_t key, char *path, uint64_t relayd_id, |
366 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 367 | { |
d771f832 DG |
368 | int ret, use_relayd = 0; |
369 | ssize_t ret_read; | |
07b86b52 | 370 | struct lttng_consumer_stream *metadata_stream; |
d771f832 | 371 | |
a0377dfe | 372 | LTTNG_ASSERT(ctx); |
07b86b52 JD |
373 | |
374 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
375 | key, path); | |
376 | ||
377 | rcu_read_lock(); | |
378 | ||
07b86b52 | 379 | metadata_stream = metadata_channel->metadata_stream; |
a0377dfe | 380 | LTTNG_ASSERT(metadata_stream); |
d2956687 | 381 | |
947bd097 | 382 | metadata_stream->read_subbuffer_ops.lock(metadata_stream); |
a0377dfe FD |
383 | LTTNG_ASSERT(metadata_channel->trace_chunk); |
384 | LTTNG_ASSERT(metadata_stream->trace_chunk); | |
07b86b52 | 385 | |
d771f832 | 386 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 387 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
388 | use_relayd = 1; |
389 | } | |
390 | ||
391 | if (use_relayd) { | |
10a50311 | 392 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 393 | if (ret < 0) { |
fa27abe8 | 394 | goto error_snapshot; |
e2039c7a | 395 | } |
e2039c7a | 396 | } else { |
d2956687 JG |
397 | ret = consumer_stream_create_output_files(metadata_stream, |
398 | false); | |
e2039c7a | 399 | if (ret < 0) { |
fa27abe8 | 400 | goto error_snapshot; |
e2039c7a | 401 | } |
07b86b52 | 402 | } |
07b86b52 | 403 | |
d771f832 | 404 | do { |
9ce5646a MD |
405 | health_code_update(); |
406 | ||
6f9449c2 | 407 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 408 | if (ret_read < 0) { |
6e5e3c51 MD |
409 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
410 | ret_read); | |
411 | ret = ret_read; | |
412 | goto error_snapshot; | |
07b86b52 | 413 | } |
6e5e3c51 | 414 | } while (ret_read > 0); |
07b86b52 | 415 | |
d771f832 DG |
416 | if (use_relayd) { |
417 | close_relayd_stream(metadata_stream); | |
418 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
419 | } else { | |
fdf9986c MD |
420 | if (metadata_stream->out_fd >= 0) { |
421 | ret = close(metadata_stream->out_fd); | |
422 | if (ret < 0) { | |
423 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
424 | /* | |
425 | * Don't go on error here since the snapshot was successful at this | |
426 | * point but somehow the close failed. | |
427 | */ | |
428 | } | |
429 | metadata_stream->out_fd = -1; | |
d2956687 JG |
430 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
431 | metadata_stream->trace_chunk = NULL; | |
e2039c7a | 432 | } |
e2039c7a JD |
433 | } |
434 | ||
07b86b52 | 435 | ret = 0; |
fa27abe8 | 436 | error_snapshot: |
947bd097 | 437 | metadata_stream->read_subbuffer_ops.unlock(metadata_stream); |
cf53a8a6 JD |
438 | consumer_stream_destroy(metadata_stream, NULL); |
439 | metadata_channel->metadata_stream = NULL; | |
07b86b52 JD |
440 | rcu_read_unlock(); |
441 | return ret; | |
442 | } | |
443 | ||
1803a064 MD |
444 | /* |
445 | * Receive command from session daemon and process it. | |
446 | * | |
447 | * Return 1 on success else a negative value or 0. | |
448 | */ | |
3bd1e081 MD |
449 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
450 | int sock, struct pollfd *consumer_sockpoll) | |
451 | { | |
0c5b3718 | 452 | int ret_func; |
0c759fc9 | 453 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
454 | struct lttcomm_consumer_msg msg; |
455 | ||
9ce5646a MD |
456 | health_code_update(); |
457 | ||
0c5b3718 SM |
458 | { |
459 | ssize_t ret_recv; | |
460 | ||
461 | ret_recv = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
462 | if (ret_recv != sizeof(msg)) { | |
463 | if (ret_recv > 0) { | |
464 | lttng_consumer_send_error(ctx, | |
465 | LTTCOMM_CONSUMERD_ERROR_RECV_CMD); | |
466 | ret_recv = -1; | |
467 | } | |
468 | return ret_recv; | |
1803a064 | 469 | } |
3bd1e081 | 470 | } |
9ce5646a MD |
471 | |
472 | health_code_update(); | |
473 | ||
84382d49 | 474 | /* Deprecated command */ |
a0377dfe | 475 | LTTNG_ASSERT(msg.cmd_type != LTTNG_CONSUMER_STOP); |
3bd1e081 | 476 | |
9ce5646a MD |
477 | health_code_update(); |
478 | ||
b0b335c8 MD |
479 | /* relayd needs RCU read-side protection */ |
480 | rcu_read_lock(); | |
481 | ||
3bd1e081 | 482 | switch (msg.cmd_type) { |
00e2e675 DG |
483 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
484 | { | |
4222116f JR |
485 | uint32_t major = msg.u.relayd_sock.major; |
486 | uint32_t minor = msg.u.relayd_sock.minor; | |
487 | enum lttcomm_sock_proto protocol = (enum lttcomm_sock_proto) | |
488 | msg.u.relayd_sock.relayd_socket_protocol; | |
489 | ||
f50f23d9 | 490 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 491 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
4222116f JR |
492 | msg.u.relayd_sock.type, ctx, sock, |
493 | consumer_sockpoll, msg.u.relayd_sock.session_id, | |
494 | msg.u.relayd_sock.relayd_session_id, major, | |
495 | minor, protocol); | |
00e2e675 DG |
496 | goto end_nosignal; |
497 | } | |
3bd1e081 MD |
498 | case LTTNG_CONSUMER_ADD_CHANNEL: |
499 | { | |
500 | struct lttng_consumer_channel *new_channel; | |
afbf29db | 501 | int ret_send_status, ret_add_channel = 0; |
d2956687 | 502 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 503 | |
9ce5646a MD |
504 | health_code_update(); |
505 | ||
f50f23d9 | 506 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
507 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
508 | if (ret_send_status < 0) { | |
f50f23d9 | 509 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 510 | goto error_fatal; |
f50f23d9 | 511 | } |
9ce5646a MD |
512 | |
513 | health_code_update(); | |
514 | ||
d88aee68 | 515 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 516 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
d2956687 JG |
517 | msg.u.channel.session_id, |
518 | msg.u.channel.chunk_id.is_set ? | |
519 | &chunk_id : NULL, | |
520 | msg.u.channel.pathname, | |
521 | msg.u.channel.name, | |
1624d5b7 JD |
522 | msg.u.channel.relayd_id, msg.u.channel.output, |
523 | msg.u.channel.tracefile_size, | |
1950109e | 524 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 525 | msg.u.channel.monitor, |
d7ba1388 | 526 | msg.u.channel.live_timer_interval, |
a2814ea7 | 527 | msg.u.channel.is_live, |
3d071855 | 528 | NULL, NULL); |
3bd1e081 | 529 | if (new_channel == NULL) { |
f73fabfd | 530 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
531 | goto end_nosignal; |
532 | } | |
ffe60014 | 533 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
534 | switch (msg.u.channel.output) { |
535 | case LTTNG_EVENT_SPLICE: | |
536 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
537 | break; | |
538 | case LTTNG_EVENT_MMAP: | |
539 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
540 | break; | |
541 | default: | |
542 | ERR("Channel output unknown %d", msg.u.channel.output); | |
543 | goto end_nosignal; | |
544 | } | |
ffe60014 DG |
545 | |
546 | /* Translate and save channel type. */ | |
547 | switch (msg.u.channel.type) { | |
548 | case CONSUMER_CHANNEL_TYPE_DATA: | |
549 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
97535efa | 550 | new_channel->type = (consumer_channel_type) msg.u.channel.type; |
ffe60014 DG |
551 | break; |
552 | default: | |
a0377dfe | 553 | abort(); |
ffe60014 DG |
554 | goto end_nosignal; |
555 | }; | |
556 | ||
9ce5646a MD |
557 | health_code_update(); |
558 | ||
3bd1e081 | 559 | if (ctx->on_recv_channel != NULL) { |
0c5b3718 SM |
560 | int ret_recv_channel = |
561 | ctx->on_recv_channel(new_channel); | |
562 | if (ret_recv_channel == 0) { | |
563 | ret_add_channel = consumer_add_channel( | |
564 | new_channel, ctx); | |
565 | } else if (ret_recv_channel < 0) { | |
3bd1e081 MD |
566 | goto end_nosignal; |
567 | } | |
568 | } else { | |
0c5b3718 SM |
569 | ret_add_channel = |
570 | consumer_add_channel(new_channel, ctx); | |
3bd1e081 | 571 | } |
0c5b3718 SM |
572 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && |
573 | !ret_add_channel) { | |
e9404c27 JG |
574 | int monitor_start_ret; |
575 | ||
576 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
577 | consumer_timer_live_start(new_channel, |
578 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
579 | monitor_start_ret = consumer_timer_monitor_start( |
580 | new_channel, | |
581 | msg.u.channel.monitor_timer_interval); | |
582 | if (monitor_start_ret < 0) { | |
583 | ERR("Starting channel monitoring timer failed"); | |
584 | goto end_nosignal; | |
585 | } | |
94d49140 | 586 | } |
e43c41c5 | 587 | |
9ce5646a MD |
588 | health_code_update(); |
589 | ||
e43c41c5 | 590 | /* If we received an error in add_channel, we need to report it. */ |
0c5b3718 SM |
591 | if (ret_add_channel < 0) { |
592 | ret_send_status = consumer_send_status_msg( | |
593 | sock, ret_add_channel); | |
594 | if (ret_send_status < 0) { | |
1803a064 MD |
595 | goto error_fatal; |
596 | } | |
e43c41c5 JD |
597 | goto end_nosignal; |
598 | } | |
599 | ||
3bd1e081 MD |
600 | goto end_nosignal; |
601 | } | |
602 | case LTTNG_CONSUMER_ADD_STREAM: | |
603 | { | |
dae10966 DG |
604 | int fd; |
605 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 606 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 607 | struct lttng_consumer_channel *channel; |
c80048c6 | 608 | int alloc_ret = 0; |
0c5b3718 SM |
609 | int ret_send_status, ret_poll, ret_get_max_subbuf_size; |
610 | ssize_t ret_pipe_write, ret_recv; | |
3bd1e081 | 611 | |
ffe60014 DG |
612 | /* |
613 | * Get stream's channel reference. Needed when adding the stream to the | |
614 | * global hash table. | |
615 | */ | |
616 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
617 | if (!channel) { | |
618 | /* | |
619 | * We could not find the channel. Can happen if cpu hotplug | |
620 | * happens while tearing down. | |
621 | */ | |
d88aee68 | 622 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 623 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
624 | } |
625 | ||
9ce5646a MD |
626 | health_code_update(); |
627 | ||
f50f23d9 | 628 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
629 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
630 | if (ret_send_status < 0) { | |
d771f832 | 631 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 632 | goto error_add_stream_fatal; |
1803a064 | 633 | } |
9ce5646a MD |
634 | |
635 | health_code_update(); | |
636 | ||
0c759fc9 | 637 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 638 | /* Channel was not found. */ |
c5c7998f | 639 | goto error_add_stream_nosignal; |
f50f23d9 DG |
640 | } |
641 | ||
d771f832 | 642 | /* Blocking call */ |
9ce5646a | 643 | health_poll_entry(); |
0c5b3718 | 644 | ret_poll = lttng_consumer_poll_socket(consumer_sockpoll); |
9ce5646a | 645 | health_poll_exit(); |
0c5b3718 | 646 | if (ret_poll) { |
c5c7998f | 647 | goto error_add_stream_fatal; |
3bd1e081 | 648 | } |
00e2e675 | 649 | |
9ce5646a MD |
650 | health_code_update(); |
651 | ||
00e2e675 | 652 | /* Get stream file descriptor from socket */ |
0c5b3718 SM |
653 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
654 | if (ret_recv != sizeof(fd)) { | |
f73fabfd | 655 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
0c5b3718 | 656 | ret_func = ret_recv; |
c5c7998f | 657 | goto end; |
3bd1e081 | 658 | } |
3bd1e081 | 659 | |
9ce5646a MD |
660 | health_code_update(); |
661 | ||
f50f23d9 DG |
662 | /* |
663 | * Send status code to session daemon only if the recv works. If the | |
664 | * above recv() failed, the session daemon is notified through the | |
665 | * error socket and the teardown is eventually done. | |
666 | */ | |
0c5b3718 SM |
667 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
668 | if (ret_send_status < 0) { | |
f50f23d9 | 669 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 670 | goto error_add_stream_nosignal; |
f50f23d9 DG |
671 | } |
672 | ||
9ce5646a MD |
673 | health_code_update(); |
674 | ||
d2956687 | 675 | pthread_mutex_lock(&channel->lock); |
6f9449c2 | 676 | new_stream = consumer_stream_create( |
49f45573 JG |
677 | channel, |
678 | channel->key, | |
ffe60014 | 679 | fd, |
ffe60014 | 680 | channel->name, |
ffe60014 DG |
681 | channel->relayd_id, |
682 | channel->session_id, | |
d2956687 | 683 | channel->trace_chunk, |
ffe60014 DG |
684 | msg.u.stream.cpu, |
685 | &alloc_ret, | |
4891ece8 | 686 | channel->type, |
d2956687 | 687 | channel->monitor); |
3bd1e081 | 688 | if (new_stream == NULL) { |
c80048c6 MD |
689 | switch (alloc_ret) { |
690 | case -ENOMEM: | |
691 | case -EINVAL: | |
692 | default: | |
693 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
694 | break; | |
c80048c6 | 695 | } |
d2956687 | 696 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 697 | goto error_add_stream_nosignal; |
3bd1e081 | 698 | } |
d771f832 | 699 | |
ffe60014 | 700 | new_stream->wait_fd = fd; |
0c5b3718 SM |
701 | ret_get_max_subbuf_size = kernctl_get_max_subbuf_size( |
702 | new_stream->wait_fd, &new_stream->max_sb_size); | |
703 | if (ret_get_max_subbuf_size < 0) { | |
d05185fa JG |
704 | pthread_mutex_unlock(&channel->lock); |
705 | ERR("Failed to get kernel maximal subbuffer size"); | |
c5c7998f | 706 | goto error_add_stream_nosignal; |
d05185fa JG |
707 | } |
708 | ||
d9a2e16e JD |
709 | consumer_stream_update_channel_attributes(new_stream, |
710 | channel); | |
00e2e675 | 711 | |
a0c83db9 DG |
712 | /* |
713 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
714 | * refcount right now. We don't need to increment the refcount for |
715 | * streams in no monitor because we handle manually the cleanup of | |
716 | * those. It is very important to make sure there is NO prior | |
717 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 718 | */ |
07b86b52 JD |
719 | if (channel->monitor) { |
720 | uatomic_inc(&new_stream->chan->refcount); | |
721 | } | |
9d9353f9 | 722 | |
fb3a43a9 DG |
723 | /* |
724 | * The buffer flush is done on the session daemon side for the kernel | |
725 | * so no need for the stream "hangup_flush_done" variable to be | |
726 | * tracked. This is important for a kernel stream since we don't rely | |
727 | * on the flush state of the stream to read data. It's not the case for | |
728 | * user space tracing. | |
729 | */ | |
730 | new_stream->hangup_flush_done = 0; | |
731 | ||
9ce5646a MD |
732 | health_code_update(); |
733 | ||
d2956687 | 734 | pthread_mutex_lock(&new_stream->lock); |
633d0084 | 735 | if (ctx->on_recv_stream) { |
0c5b3718 SM |
736 | int ret_recv_stream = ctx->on_recv_stream(new_stream); |
737 | if (ret_recv_stream < 0) { | |
d2956687 JG |
738 | pthread_mutex_unlock(&new_stream->lock); |
739 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 740 | consumer_stream_free(new_stream); |
c5c7998f | 741 | goto error_add_stream_nosignal; |
fb3a43a9 | 742 | } |
633d0084 | 743 | } |
9ce5646a MD |
744 | health_code_update(); |
745 | ||
07b86b52 JD |
746 | if (new_stream->metadata_flag) { |
747 | channel->metadata_stream = new_stream; | |
748 | } | |
749 | ||
2bba9e53 DG |
750 | /* Do not monitor this stream. */ |
751 | if (!channel->monitor) { | |
5eecee74 | 752 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 753 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 754 | new_stream->net_seq_idx); |
10a50311 | 755 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
d2956687 JG |
756 | pthread_mutex_unlock(&new_stream->lock); |
757 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 758 | goto end_add_stream; |
6dc3064a DG |
759 | } |
760 | ||
e1b71bdc DG |
761 | /* Send stream to relayd if the stream has an ID. */ |
762 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
763 | int ret_send_relayd_stream; |
764 | ||
765 | ret_send_relayd_stream = consumer_send_relayd_stream( | |
766 | new_stream, new_stream->chan->pathname); | |
767 | if (ret_send_relayd_stream < 0) { | |
d2956687 JG |
768 | pthread_mutex_unlock(&new_stream->lock); |
769 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 770 | consumer_stream_free(new_stream); |
c5c7998f | 771 | goto error_add_stream_nosignal; |
e1b71bdc | 772 | } |
001b7e62 MD |
773 | |
774 | /* | |
775 | * If adding an extra stream to an already | |
776 | * existing channel (e.g. cpu hotplug), we need | |
777 | * to send the "streams_sent" command to relayd. | |
778 | */ | |
779 | if (channel->streams_sent_to_relayd) { | |
0c5b3718 SM |
780 | int ret_send_relayd_streams_sent; |
781 | ||
782 | ret_send_relayd_streams_sent = | |
783 | consumer_send_relayd_streams_sent( | |
784 | new_stream->net_seq_idx); | |
785 | if (ret_send_relayd_streams_sent < 0) { | |
d2956687 JG |
786 | pthread_mutex_unlock(&new_stream->lock); |
787 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 788 | goto error_add_stream_nosignal; |
001b7e62 MD |
789 | } |
790 | } | |
e2039c7a | 791 | } |
d2956687 JG |
792 | pthread_mutex_unlock(&new_stream->lock); |
793 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 794 | |
50f8ae69 | 795 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 796 | if (new_stream->metadata_flag) { |
66d583dc | 797 | consumer_add_metadata_stream(new_stream); |
dae10966 | 798 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 799 | } else { |
66d583dc | 800 | consumer_add_data_stream(new_stream); |
dae10966 | 801 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
802 | } |
803 | ||
66d583dc | 804 | /* Visible to other threads */ |
5ab66908 MD |
805 | new_stream->globally_visible = 1; |
806 | ||
9ce5646a MD |
807 | health_code_update(); |
808 | ||
0c5b3718 SM |
809 | ret_pipe_write = lttng_pipe_write( |
810 | stream_pipe, &new_stream, sizeof(new_stream)); | |
811 | if (ret_pipe_write < 0) { | |
dae10966 | 812 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 813 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 814 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
815 | if (new_stream->metadata_flag) { |
816 | consumer_del_stream_for_metadata(new_stream); | |
817 | } else { | |
818 | consumer_del_stream_for_data(new_stream); | |
819 | } | |
c5c7998f | 820 | goto error_add_stream_nosignal; |
3bd1e081 | 821 | } |
00e2e675 | 822 | |
02d02e31 JD |
823 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
824 | new_stream->name, fd, new_stream->chan->pathname, new_stream->relayd_stream_id); | |
c5c7998f | 825 | end_add_stream: |
3bd1e081 | 826 | break; |
c5c7998f JG |
827 | error_add_stream_nosignal: |
828 | goto end_nosignal; | |
829 | error_add_stream_fatal: | |
830 | goto error_fatal; | |
3bd1e081 | 831 | } |
a4baae1b JD |
832 | case LTTNG_CONSUMER_STREAMS_SENT: |
833 | { | |
834 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 835 | int ret_send_status; |
a4baae1b JD |
836 | |
837 | /* | |
838 | * Get stream's channel reference. Needed when adding the stream to the | |
839 | * global hash table. | |
840 | */ | |
841 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
842 | if (!channel) { | |
843 | /* | |
844 | * We could not find the channel. Can happen if cpu hotplug | |
845 | * happens while tearing down. | |
846 | */ | |
847 | ERR("Unable to find channel key %" PRIu64, | |
848 | msg.u.sent_streams.channel_key); | |
e462382a | 849 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
850 | } |
851 | ||
852 | health_code_update(); | |
853 | ||
854 | /* | |
855 | * Send status code to session daemon. | |
856 | */ | |
0c5b3718 SM |
857 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
858 | if (ret_send_status < 0 || | |
859 | ret_code != LTTCOMM_CONSUMERD_SUCCESS) { | |
a4baae1b | 860 | /* Somehow, the session daemon is not responding anymore. */ |
80d5a658 | 861 | goto error_streams_sent_nosignal; |
a4baae1b JD |
862 | } |
863 | ||
864 | health_code_update(); | |
865 | ||
866 | /* | |
867 | * We should not send this message if we don't monitor the | |
868 | * streams in this channel. | |
869 | */ | |
870 | if (!channel->monitor) { | |
80d5a658 | 871 | goto end_error_streams_sent; |
a4baae1b JD |
872 | } |
873 | ||
874 | health_code_update(); | |
875 | /* Send stream to relayd if the stream has an ID. */ | |
876 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
877 | int ret_send_relay_streams; |
878 | ||
879 | ret_send_relay_streams = consumer_send_relayd_streams_sent( | |
a4baae1b | 880 | msg.u.sent_streams.net_seq_idx); |
0c5b3718 | 881 | if (ret_send_relay_streams < 0) { |
80d5a658 | 882 | goto error_streams_sent_nosignal; |
a4baae1b | 883 | } |
001b7e62 | 884 | channel->streams_sent_to_relayd = true; |
a4baae1b | 885 | } |
80d5a658 | 886 | end_error_streams_sent: |
a4baae1b | 887 | break; |
80d5a658 JG |
888 | error_streams_sent_nosignal: |
889 | goto end_nosignal; | |
a4baae1b | 890 | } |
3bd1e081 MD |
891 | case LTTNG_CONSUMER_UPDATE_STREAM: |
892 | { | |
3f8e211f DG |
893 | rcu_read_unlock(); |
894 | return -ENOSYS; | |
895 | } | |
896 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
897 | { | |
a6ba4fe1 | 898 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f | 899 | struct consumer_relayd_sock_pair *relayd; |
0c5b3718 | 900 | int ret_send_status; |
3f8e211f | 901 | |
a6ba4fe1 | 902 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
903 | |
904 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 905 | relayd = consumer_find_relayd(index); |
3f8e211f | 906 | if (relayd == NULL) { |
3448e266 | 907 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 908 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 909 | } |
3f8e211f | 910 | |
a6ba4fe1 DG |
911 | /* |
912 | * Each relayd socket pair has a refcount of stream attached to it | |
913 | * which tells if the relayd is still active or not depending on the | |
914 | * refcount value. | |
915 | * | |
916 | * This will set the destroy flag of the relayd object and destroy it | |
917 | * if the refcount reaches zero when called. | |
918 | * | |
919 | * The destroy can happen either here or when a stream fd hangs up. | |
920 | */ | |
f50f23d9 DG |
921 | if (relayd) { |
922 | consumer_flag_relayd_for_destroy(relayd); | |
923 | } | |
924 | ||
9ce5646a MD |
925 | health_code_update(); |
926 | ||
0c5b3718 SM |
927 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
928 | if (ret_send_status < 0) { | |
f50f23d9 | 929 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 930 | goto error_fatal; |
f50f23d9 | 931 | } |
3f8e211f | 932 | |
3f8e211f | 933 | goto end_nosignal; |
3bd1e081 | 934 | } |
6d805429 | 935 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 936 | { |
0c5b3718 | 937 | int32_t ret_data_pending; |
6d805429 | 938 | uint64_t id = msg.u.data_pending.session_id; |
0c5b3718 | 939 | ssize_t ret_send; |
c8f59ee5 | 940 | |
6d805429 | 941 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 942 | |
0c5b3718 | 943 | ret_data_pending = consumer_data_pending(id); |
c8f59ee5 | 944 | |
9ce5646a MD |
945 | health_code_update(); |
946 | ||
c8f59ee5 | 947 | /* Send back returned value to session daemon */ |
0c5b3718 SM |
948 | ret_send = lttcomm_send_unix_sock(sock, &ret_data_pending, |
949 | sizeof(ret_data_pending)); | |
950 | if (ret_send < 0) { | |
6d805429 | 951 | PERROR("send data pending ret code"); |
1803a064 | 952 | goto error_fatal; |
c8f59ee5 | 953 | } |
f50f23d9 DG |
954 | |
955 | /* | |
956 | * No need to send back a status message since the data pending | |
957 | * returned value is the response. | |
958 | */ | |
c8f59ee5 | 959 | break; |
53632229 | 960 | } |
6dc3064a DG |
961 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
962 | { | |
3eb928aa MD |
963 | struct lttng_consumer_channel *channel; |
964 | uint64_t key = msg.u.snapshot_channel.key; | |
0c5b3718 | 965 | int ret_send_status; |
3eb928aa MD |
966 | |
967 | channel = consumer_find_channel(key); | |
968 | if (!channel) { | |
969 | ERR("Channel %" PRIu64 " not found", key); | |
970 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 971 | } else { |
3eb928aa | 972 | if (msg.u.snapshot_channel.metadata == 1) { |
0c5b3718 SM |
973 | int ret_snapshot; |
974 | ||
975 | ret_snapshot = lttng_kconsumer_snapshot_metadata( | |
976 | channel, key, | |
3eb928aa | 977 | msg.u.snapshot_channel.pathname, |
0c5b3718 SM |
978 | msg.u.snapshot_channel.relayd_id, |
979 | ctx); | |
980 | if (ret_snapshot < 0) { | |
3eb928aa MD |
981 | ERR("Snapshot metadata failed"); |
982 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
983 | } | |
984 | } else { | |
0c5b3718 SM |
985 | int ret_snapshot; |
986 | ||
987 | ret_snapshot = lttng_kconsumer_snapshot_channel( | |
988 | channel, key, | |
3eb928aa MD |
989 | msg.u.snapshot_channel.pathname, |
990 | msg.u.snapshot_channel.relayd_id, | |
0c5b3718 SM |
991 | msg.u.snapshot_channel |
992 | .nb_packets_per_stream, | |
3eb928aa | 993 | ctx); |
0c5b3718 | 994 | if (ret_snapshot < 0) { |
3eb928aa MD |
995 | ERR("Snapshot channel failed"); |
996 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
997 | } | |
07b86b52 JD |
998 | } |
999 | } | |
9ce5646a MD |
1000 | health_code_update(); |
1001 | ||
0c5b3718 SM |
1002 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1003 | if (ret_send_status < 0) { | |
6dc3064a DG |
1004 | /* Somehow, the session daemon is not responding anymore. */ |
1005 | goto end_nosignal; | |
1006 | } | |
1007 | break; | |
1008 | } | |
07b86b52 JD |
1009 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
1010 | { | |
1011 | uint64_t key = msg.u.destroy_channel.key; | |
1012 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 1013 | int ret_send_status; |
07b86b52 JD |
1014 | |
1015 | channel = consumer_find_channel(key); | |
1016 | if (!channel) { | |
1017 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 1018 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
1019 | } |
1020 | ||
9ce5646a MD |
1021 | health_code_update(); |
1022 | ||
0c5b3718 SM |
1023 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1024 | if (ret_send_status < 0) { | |
07b86b52 | 1025 | /* Somehow, the session daemon is not responding anymore. */ |
a9d36096 | 1026 | goto end_destroy_channel; |
07b86b52 JD |
1027 | } |
1028 | ||
9ce5646a MD |
1029 | health_code_update(); |
1030 | ||
15dc512a DG |
1031 | /* Stop right now if no channel was found. */ |
1032 | if (!channel) { | |
a9d36096 | 1033 | goto end_destroy_channel; |
15dc512a DG |
1034 | } |
1035 | ||
07b86b52 JD |
1036 | /* |
1037 | * This command should ONLY be issued for channel with streams set in | |
1038 | * no monitor mode. | |
1039 | */ | |
a0377dfe | 1040 | LTTNG_ASSERT(!channel->monitor); |
07b86b52 JD |
1041 | |
1042 | /* | |
1043 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1044 | * monitor mode. | |
1045 | */ | |
a0377dfe | 1046 | LTTNG_ASSERT(!uatomic_sub_return(&channel->refcount, 1)); |
07b86b52 JD |
1047 | |
1048 | consumer_del_channel(channel); | |
a9d36096 | 1049 | end_destroy_channel: |
07b86b52 JD |
1050 | goto end_nosignal; |
1051 | } | |
fb83fe64 JD |
1052 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1053 | { | |
66ab32be JD |
1054 | ssize_t ret; |
1055 | uint64_t count; | |
fb83fe64 JD |
1056 | struct lttng_consumer_channel *channel; |
1057 | uint64_t id = msg.u.discarded_events.session_id; | |
1058 | uint64_t key = msg.u.discarded_events.channel_key; | |
1059 | ||
e5742757 MD |
1060 | DBG("Kernel consumer discarded events command for session id %" |
1061 | PRIu64 ", channel key %" PRIu64, id, key); | |
1062 | ||
fb83fe64 JD |
1063 | channel = consumer_find_channel(key); |
1064 | if (!channel) { | |
1065 | ERR("Kernel consumer discarded events channel %" | |
1066 | PRIu64 " not found", key); | |
66ab32be | 1067 | count = 0; |
e5742757 | 1068 | } else { |
66ab32be | 1069 | count = channel->discarded_events; |
fb83fe64 JD |
1070 | } |
1071 | ||
fb83fe64 JD |
1072 | health_code_update(); |
1073 | ||
1074 | /* Send back returned value to session daemon */ | |
66ab32be | 1075 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1076 | if (ret < 0) { |
1077 | PERROR("send discarded events"); | |
1078 | goto error_fatal; | |
1079 | } | |
1080 | ||
1081 | break; | |
1082 | } | |
1083 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1084 | { | |
66ab32be JD |
1085 | ssize_t ret; |
1086 | uint64_t count; | |
fb83fe64 JD |
1087 | struct lttng_consumer_channel *channel; |
1088 | uint64_t id = msg.u.lost_packets.session_id; | |
1089 | uint64_t key = msg.u.lost_packets.channel_key; | |
1090 | ||
e5742757 MD |
1091 | DBG("Kernel consumer lost packets command for session id %" |
1092 | PRIu64 ", channel key %" PRIu64, id, key); | |
1093 | ||
fb83fe64 JD |
1094 | channel = consumer_find_channel(key); |
1095 | if (!channel) { | |
1096 | ERR("Kernel consumer lost packets channel %" | |
1097 | PRIu64 " not found", key); | |
66ab32be | 1098 | count = 0; |
e5742757 | 1099 | } else { |
66ab32be | 1100 | count = channel->lost_packets; |
fb83fe64 JD |
1101 | } |
1102 | ||
fb83fe64 JD |
1103 | health_code_update(); |
1104 | ||
1105 | /* Send back returned value to session daemon */ | |
66ab32be | 1106 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1107 | if (ret < 0) { |
1108 | PERROR("send lost packets"); | |
1109 | goto error_fatal; | |
1110 | } | |
1111 | ||
1112 | break; | |
1113 | } | |
b3530820 JG |
1114 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1115 | { | |
1116 | int channel_monitor_pipe; | |
0c5b3718 SM |
1117 | int ret_send_status, ret_set_channel_monitor_pipe; |
1118 | ssize_t ret_recv; | |
b3530820 JG |
1119 | |
1120 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1121 | /* Successfully received the command's type. */ | |
0c5b3718 SM |
1122 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1123 | if (ret_send_status < 0) { | |
b3530820 JG |
1124 | goto error_fatal; |
1125 | } | |
1126 | ||
0c5b3718 SM |
1127 | ret_recv = lttcomm_recv_fds_unix_sock( |
1128 | sock, &channel_monitor_pipe, 1); | |
1129 | if (ret_recv != sizeof(channel_monitor_pipe)) { | |
b3530820 JG |
1130 | ERR("Failed to receive channel monitor pipe"); |
1131 | goto error_fatal; | |
1132 | } | |
1133 | ||
1134 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
0c5b3718 SM |
1135 | ret_set_channel_monitor_pipe = |
1136 | consumer_timer_thread_set_channel_monitor_pipe( | |
1137 | channel_monitor_pipe); | |
1138 | if (!ret_set_channel_monitor_pipe) { | |
b3530820 | 1139 | int flags; |
0c5b3718 | 1140 | int ret_fcntl; |
b3530820 JG |
1141 | |
1142 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1143 | /* Set the pipe as non-blocking. */ | |
0c5b3718 SM |
1144 | ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); |
1145 | if (ret_fcntl == -1) { | |
b3530820 JG |
1146 | PERROR("fcntl get flags of the channel monitoring pipe"); |
1147 | goto error_fatal; | |
1148 | } | |
0c5b3718 | 1149 | flags = ret_fcntl; |
b3530820 | 1150 | |
0c5b3718 | 1151 | ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, |
b3530820 | 1152 | flags | O_NONBLOCK); |
0c5b3718 | 1153 | if (ret_fcntl == -1) { |
b3530820 JG |
1154 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); |
1155 | goto error_fatal; | |
1156 | } | |
1157 | DBG("Channel monitor pipe set as non-blocking"); | |
1158 | } else { | |
1159 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1160 | } | |
0c5b3718 SM |
1161 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1162 | if (ret_send_status < 0) { | |
b3530820 JG |
1163 | goto error_fatal; |
1164 | } | |
1165 | break; | |
1166 | } | |
b99a8d42 JD |
1167 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1168 | { | |
92b7a7f8 MD |
1169 | struct lttng_consumer_channel *channel; |
1170 | uint64_t key = msg.u.rotate_channel.key; | |
0c5b3718 | 1171 | int ret_send_status; |
b99a8d42 | 1172 | |
92b7a7f8 | 1173 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1174 | |
92b7a7f8 MD |
1175 | channel = consumer_find_channel(key); |
1176 | if (!channel) { | |
1177 | ERR("Channel %" PRIu64 " not found", key); | |
1178 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1179 | } else { | |
1180 | /* | |
1181 | * Sample the rotate position of all the streams in this channel. | |
1182 | */ | |
0c5b3718 SM |
1183 | int ret_rotate_channel; |
1184 | ||
1185 | ret_rotate_channel = lttng_consumer_rotate_channel( | |
1186 | channel, key, | |
92b7a7f8 | 1187 | msg.u.rotate_channel.relayd_id, |
0c5b3718 SM |
1188 | msg.u.rotate_channel.metadata, ctx); |
1189 | if (ret_rotate_channel < 0) { | |
92b7a7f8 MD |
1190 | ERR("Rotate channel failed"); |
1191 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1192 | } | |
b99a8d42 | 1193 | |
92b7a7f8 MD |
1194 | health_code_update(); |
1195 | } | |
0c5b3718 SM |
1196 | |
1197 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1198 | if (ret_send_status < 0) { | |
b99a8d42 | 1199 | /* Somehow, the session daemon is not responding anymore. */ |
713bdd26 | 1200 | goto error_rotate_channel; |
b99a8d42 | 1201 | } |
92b7a7f8 MD |
1202 | if (channel) { |
1203 | /* Rotate the streams that are ready right now. */ | |
0c5b3718 SM |
1204 | int ret_rotate; |
1205 | ||
1206 | ret_rotate = lttng_consumer_rotate_ready_streams( | |
92b7a7f8 | 1207 | channel, key, ctx); |
0c5b3718 | 1208 | if (ret_rotate < 0) { |
92b7a7f8 MD |
1209 | ERR("Rotate ready streams failed"); |
1210 | } | |
b99a8d42 | 1211 | } |
b99a8d42 | 1212 | break; |
713bdd26 JG |
1213 | error_rotate_channel: |
1214 | goto end_nosignal; | |
b99a8d42 | 1215 | } |
5f3aff8b MD |
1216 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
1217 | { | |
1218 | struct lttng_consumer_channel *channel; | |
1219 | uint64_t key = msg.u.clear_channel.key; | |
0c5b3718 | 1220 | int ret_send_status; |
5f3aff8b MD |
1221 | |
1222 | channel = consumer_find_channel(key); | |
1223 | if (!channel) { | |
1224 | DBG("Channel %" PRIu64 " not found", key); | |
1225 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1226 | } else { | |
0c5b3718 SM |
1227 | int ret_clear_channel; |
1228 | ||
1229 | ret_clear_channel = | |
1230 | lttng_consumer_clear_channel(channel); | |
1231 | if (ret_clear_channel) { | |
5f3aff8b | 1232 | ERR("Clear channel failed"); |
97535efa | 1233 | ret_code = (lttcomm_return_code) ret_clear_channel; |
5f3aff8b MD |
1234 | } |
1235 | ||
1236 | health_code_update(); | |
1237 | } | |
0c5b3718 SM |
1238 | |
1239 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1240 | if (ret_send_status < 0) { | |
5f3aff8b MD |
1241 | /* Somehow, the session daemon is not responding anymore. */ |
1242 | goto end_nosignal; | |
1243 | } | |
1244 | ||
1245 | break; | |
1246 | } | |
d2956687 | 1247 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1248 | { |
0c5b3718 SM |
1249 | int ret_send_status; |
1250 | ||
d2956687 JG |
1251 | ret_code = lttng_consumer_init_command(ctx, |
1252 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1253 | health_code_update(); |
0c5b3718 SM |
1254 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1255 | if (ret_send_status < 0) { | |
00fb02ac JD |
1256 | /* Somehow, the session daemon is not responding anymore. */ |
1257 | goto end_nosignal; | |
1258 | } | |
1259 | break; | |
1260 | } | |
d2956687 | 1261 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1262 | { |
d2956687 | 1263 | const struct lttng_credentials credentials = { |
ff588497 JR |
1264 | .uid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.uid), |
1265 | .gid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.gid), | |
d2956687 JG |
1266 | }; |
1267 | const bool is_local_trace = | |
1268 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1269 | const uint64_t relayd_id = | |
1270 | msg.u.create_trace_chunk.relayd_id.value; | |
1271 | const char *chunk_override_name = | |
1272 | *msg.u.create_trace_chunk.override_name ? | |
1273 | msg.u.create_trace_chunk.override_name : | |
1274 | NULL; | |
cbf53d23 | 1275 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
d88744a4 | 1276 | |
d2956687 JG |
1277 | /* |
1278 | * The session daemon will only provide a chunk directory file | |
1279 | * descriptor for local traces. | |
1280 | */ | |
1281 | if (is_local_trace) { | |
1282 | int chunk_dirfd; | |
0c5b3718 SM |
1283 | int ret_send_status; |
1284 | ssize_t ret_recv; | |
19990ed5 | 1285 | |
d2956687 | 1286 | /* Acnowledge the reception of the command. */ |
0c5b3718 SM |
1287 | ret_send_status = consumer_send_status_msg( |
1288 | sock, LTTCOMM_CONSUMERD_SUCCESS); | |
1289 | if (ret_send_status < 0) { | |
d2956687 JG |
1290 | /* Somehow, the session daemon is not responding anymore. */ |
1291 | goto end_nosignal; | |
1292 | } | |
92816cc3 | 1293 | |
0c5b3718 SM |
1294 | ret_recv = lttcomm_recv_fds_unix_sock( |
1295 | sock, &chunk_dirfd, 1); | |
1296 | if (ret_recv != sizeof(chunk_dirfd)) { | |
d2956687 JG |
1297 | ERR("Failed to receive trace chunk directory file descriptor"); |
1298 | goto error_fatal; | |
1299 | } | |
92816cc3 | 1300 | |
d2956687 JG |
1301 | DBG("Received trace chunk directory fd (%d)", |
1302 | chunk_dirfd); | |
cbf53d23 | 1303 | chunk_directory_handle = lttng_directory_handle_create_from_dirfd( |
d2956687 | 1304 | chunk_dirfd); |
cbf53d23 | 1305 | if (!chunk_directory_handle) { |
d2956687 JG |
1306 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); |
1307 | if (close(chunk_dirfd)) { | |
1308 | PERROR("Failed to close chunk directory file descriptor"); | |
1309 | } | |
1310 | goto error_fatal; | |
1311 | } | |
92816cc3 JG |
1312 | } |
1313 | ||
d2956687 JG |
1314 | ret_code = lttng_consumer_create_trace_chunk( |
1315 | !is_local_trace ? &relayd_id : NULL, | |
1316 | msg.u.create_trace_chunk.session_id, | |
1317 | msg.u.create_trace_chunk.chunk_id, | |
e5add6d0 JG |
1318 | (time_t) msg.u.create_trace_chunk |
1319 | .creation_timestamp, | |
d2956687 | 1320 | chunk_override_name, |
e5add6d0 JG |
1321 | msg.u.create_trace_chunk.credentials.is_set ? |
1322 | &credentials : | |
1323 | NULL, | |
cbf53d23 JG |
1324 | chunk_directory_handle); |
1325 | lttng_directory_handle_put(chunk_directory_handle); | |
d2956687 | 1326 | goto end_msg_sessiond; |
d88744a4 | 1327 | } |
d2956687 | 1328 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1329 | { |
bbc4768c | 1330 | enum lttng_trace_chunk_command_type close_command = |
97535efa | 1331 | (lttng_trace_chunk_command_type) msg.u.close_trace_chunk.close_command.value; |
d2956687 JG |
1332 | const uint64_t relayd_id = |
1333 | msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f MD |
1334 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1335 | char path[LTTNG_PATH_MAX]; | |
0c5b3718 | 1336 | ssize_t ret_send; |
d2956687 JG |
1337 | |
1338 | ret_code = lttng_consumer_close_trace_chunk( | |
1339 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
bbc4768c JG |
1340 | &relayd_id : |
1341 | NULL, | |
d2956687 JG |
1342 | msg.u.close_trace_chunk.session_id, |
1343 | msg.u.close_trace_chunk.chunk_id, | |
bbc4768c JG |
1344 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1345 | msg.u.close_trace_chunk.close_command.is_set ? | |
1346 | &close_command : | |
ecd1a12f MD |
1347 | NULL, path); |
1348 | reply.ret_code = ret_code; | |
1349 | reply.path_length = strlen(path) + 1; | |
0c5b3718 SM |
1350 | ret_send = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
1351 | if (ret_send != sizeof(reply)) { | |
ecd1a12f MD |
1352 | goto error_fatal; |
1353 | } | |
0c5b3718 SM |
1354 | ret_send = lttcomm_send_unix_sock( |
1355 | sock, path, reply.path_length); | |
1356 | if (ret_send != reply.path_length) { | |
ecd1a12f MD |
1357 | goto error_fatal; |
1358 | } | |
1359 | goto end_nosignal; | |
3654ed19 | 1360 | } |
d2956687 | 1361 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 1362 | { |
d2956687 JG |
1363 | const uint64_t relayd_id = |
1364 | msg.u.trace_chunk_exists.relayd_id.value; | |
1365 | ||
1366 | ret_code = lttng_consumer_trace_chunk_exists( | |
1367 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1368 | &relayd_id : NULL, | |
1369 | msg.u.trace_chunk_exists.session_id, | |
1370 | msg.u.trace_chunk_exists.chunk_id); | |
1371 | goto end_msg_sessiond; | |
a1ae2ea5 | 1372 | } |
04ed9e10 JG |
1373 | case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: |
1374 | { | |
1375 | const uint64_t key = msg.u.open_channel_packets.key; | |
1376 | struct lttng_consumer_channel *channel = | |
1377 | consumer_find_channel(key); | |
1378 | ||
1379 | if (channel) { | |
1380 | pthread_mutex_lock(&channel->lock); | |
1381 | ret_code = lttng_consumer_open_channel_packets(channel); | |
1382 | pthread_mutex_unlock(&channel->lock); | |
1383 | } else { | |
1384 | WARN("Channel %" PRIu64 " not found", key); | |
1385 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1386 | } | |
1387 | ||
1388 | health_code_update(); | |
1389 | goto end_msg_sessiond; | |
1390 | } | |
3bd1e081 | 1391 | default: |
3f8e211f | 1392 | goto end_nosignal; |
3bd1e081 | 1393 | } |
3f8e211f | 1394 | |
3bd1e081 | 1395 | end_nosignal: |
4cbc1a04 DG |
1396 | /* |
1397 | * Return 1 to indicate success since the 0 value can be a socket | |
1398 | * shutdown during the recv() or send() call. | |
1399 | */ | |
0c5b3718 | 1400 | ret_func = 1; |
c5c7998f JG |
1401 | goto end; |
1402 | error_fatal: | |
1403 | /* This will issue a consumer stop. */ | |
0c5b3718 | 1404 | ret_func = -1; |
c5c7998f | 1405 | goto end; |
d2956687 JG |
1406 | end_msg_sessiond: |
1407 | /* | |
1408 | * The returned value here is not useful since either way we'll return 1 to | |
1409 | * the caller because the session daemon socket management is done | |
1410 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1411 | */ | |
0c5b3718 SM |
1412 | { |
1413 | int ret_send_status; | |
1414 | ||
1415 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1416 | if (ret_send_status < 0) { | |
1417 | goto error_fatal; | |
1418 | } | |
d2956687 | 1419 | } |
0c5b3718 SM |
1420 | |
1421 | ret_func = 1; | |
1422 | ||
c5c7998f | 1423 | end: |
d2956687 | 1424 | health_code_update(); |
1803a064 | 1425 | rcu_read_unlock(); |
0c5b3718 | 1426 | return ret_func; |
3bd1e081 | 1427 | } |
d41f73b7 | 1428 | |
94d49140 JD |
1429 | /* |
1430 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1431 | * metadata thread can consumer them. | |
1432 | * | |
1433 | * Metadata stream lock MUST be acquired. | |
94d49140 | 1434 | */ |
577eea73 JG |
1435 | enum sync_metadata_status lttng_kconsumer_sync_metadata( |
1436 | struct lttng_consumer_stream *metadata) | |
94d49140 JD |
1437 | { |
1438 | int ret; | |
577eea73 | 1439 | enum sync_metadata_status status; |
94d49140 | 1440 | |
a0377dfe | 1441 | LTTNG_ASSERT(metadata); |
94d49140 JD |
1442 | |
1443 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1444 | if (ret < 0) { | |
1445 | ERR("Failed to flush kernel stream"); | |
577eea73 | 1446 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
1447 | goto end; |
1448 | } | |
1449 | ||
1450 | ret = kernctl_snapshot(metadata->wait_fd); | |
1451 | if (ret < 0) { | |
577eea73 JG |
1452 | if (errno == EAGAIN) { |
1453 | /* No new metadata, exit. */ | |
1454 | DBG("Sync metadata, no new kernel metadata"); | |
1455 | status = SYNC_METADATA_STATUS_NO_DATA; | |
1456 | } else { | |
94d49140 | 1457 | ERR("Sync metadata, taking kernel snapshot failed."); |
577eea73 | 1458 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 | 1459 | } |
577eea73 JG |
1460 | } else { |
1461 | status = SYNC_METADATA_STATUS_NEW_DATA; | |
94d49140 JD |
1462 | } |
1463 | ||
1464 | end: | |
577eea73 | 1465 | return status; |
94d49140 | 1466 | } |
309167d2 | 1467 | |
fb83fe64 | 1468 | static |
6f9449c2 JG |
1469 | int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1470 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1471 | { |
1472 | int ret; | |
fb83fe64 | 1473 | |
6f9449c2 JG |
1474 | ret = kernctl_get_subbuf_size( |
1475 | stream->wait_fd, &subbuf->info.data.subbuf_size); | |
1476 | if (ret) { | |
fb83fe64 JD |
1477 | goto end; |
1478 | } | |
fb83fe64 | 1479 | |
6f9449c2 JG |
1480 | ret = kernctl_get_padded_subbuf_size( |
1481 | stream->wait_fd, &subbuf->info.data.padded_subbuf_size); | |
1482 | if (ret) { | |
fb83fe64 JD |
1483 | goto end; |
1484 | } | |
fb83fe64 JD |
1485 | |
1486 | end: | |
1487 | return ret; | |
1488 | } | |
1489 | ||
93ec662e | 1490 | static |
6f9449c2 JG |
1491 | int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1492 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1493 | { |
1494 | int ret; | |
93ec662e | 1495 | |
6f9449c2 JG |
1496 | ret = extract_common_subbuffer_info(stream, subbuf); |
1497 | if (ret) { | |
93ec662e JD |
1498 | goto end; |
1499 | } | |
1500 | ||
6f9449c2 JG |
1501 | ret = kernctl_get_metadata_version( |
1502 | stream->wait_fd, &subbuf->info.metadata.version); | |
1503 | if (ret) { | |
93ec662e JD |
1504 | goto end; |
1505 | } | |
1506 | ||
93ec662e JD |
1507 | end: |
1508 | return ret; | |
1509 | } | |
1510 | ||
6f9449c2 JG |
1511 | static |
1512 | int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, | |
1513 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1514 | { |
6f9449c2 | 1515 | int ret; |
d41f73b7 | 1516 | |
6f9449c2 JG |
1517 | ret = extract_common_subbuffer_info(stream, subbuf); |
1518 | if (ret) { | |
1519 | goto end; | |
1520 | } | |
309167d2 | 1521 | |
6f9449c2 JG |
1522 | ret = kernctl_get_packet_size( |
1523 | stream->wait_fd, &subbuf->info.data.packet_size); | |
1524 | if (ret < 0) { | |
1525 | PERROR("Failed to get sub-buffer packet size"); | |
1526 | goto end; | |
1527 | } | |
02d02e31 | 1528 | |
6f9449c2 JG |
1529 | ret = kernctl_get_content_size( |
1530 | stream->wait_fd, &subbuf->info.data.content_size); | |
1531 | if (ret < 0) { | |
1532 | PERROR("Failed to get sub-buffer content size"); | |
1533 | goto end; | |
d41f73b7 MD |
1534 | } |
1535 | ||
6f9449c2 JG |
1536 | ret = kernctl_get_timestamp_begin( |
1537 | stream->wait_fd, &subbuf->info.data.timestamp_begin); | |
1538 | if (ret < 0) { | |
1539 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1540 | goto end; | |
1d4dfdef DG |
1541 | } |
1542 | ||
6f9449c2 JG |
1543 | ret = kernctl_get_timestamp_end( |
1544 | stream->wait_fd, &subbuf->info.data.timestamp_end); | |
1545 | if (ret < 0) { | |
1546 | PERROR("Failed to get sub-buffer end timestamp"); | |
1547 | goto end; | |
1548 | } | |
1549 | ||
1550 | ret = kernctl_get_events_discarded( | |
1551 | stream->wait_fd, &subbuf->info.data.events_discarded); | |
1552 | if (ret) { | |
1553 | PERROR("Failed to get sub-buffer events discarded count"); | |
1554 | goto end; | |
1555 | } | |
1556 | ||
1557 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
1558 | &subbuf->info.data.sequence_number.value); | |
1559 | if (ret) { | |
1560 | /* May not be supported by older LTTng-modules. */ | |
1561 | if (ret != -ENOTTY) { | |
1562 | PERROR("Failed to get sub-buffer sequence number"); | |
1563 | goto end; | |
fb83fe64 | 1564 | } |
1c20f0e2 | 1565 | } else { |
6f9449c2 | 1566 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1567 | } |
1568 | ||
6f9449c2 JG |
1569 | ret = kernctl_get_stream_id( |
1570 | stream->wait_fd, &subbuf->info.data.stream_id); | |
1571 | if (ret < 0) { | |
1572 | PERROR("Failed to get stream id"); | |
1573 | goto end; | |
1574 | } | |
1d4dfdef | 1575 | |
6f9449c2 JG |
1576 | ret = kernctl_get_instance_id(stream->wait_fd, |
1577 | &subbuf->info.data.stream_instance_id.value); | |
1578 | if (ret) { | |
1579 | /* May not be supported by older LTTng-modules. */ | |
1580 | if (ret != -ENOTTY) { | |
1581 | PERROR("Failed to get stream instance id"); | |
1582 | goto end; | |
1d4dfdef | 1583 | } |
6f9449c2 JG |
1584 | } else { |
1585 | subbuf->info.data.stream_instance_id.is_set = true; | |
1586 | } | |
1587 | end: | |
1588 | return ret; | |
1589 | } | |
47e81c02 | 1590 | |
6f9449c2 | 1591 | static |
b6797c8e JG |
1592 | enum get_next_subbuffer_status get_subbuffer_common( |
1593 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1594 | struct stream_subbuffer *subbuffer) |
1595 | { | |
1596 | int ret; | |
b6797c8e | 1597 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1598 | |
1599 | ret = kernctl_get_next_subbuf(stream->wait_fd); | |
b6797c8e JG |
1600 | switch (ret) { |
1601 | case 0: | |
1602 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1603 | break; | |
1604 | case -ENODATA: | |
1605 | case -EAGAIN: | |
6e5e3c51 MD |
1606 | /* |
1607 | * The caller only expects -ENODATA when there is no data to | |
1608 | * read, but the kernel tracer returns -EAGAIN when there is | |
1609 | * currently no data for a non-finalized stream, and -ENODATA | |
1610 | * when there is no data for a finalized stream. Those can be | |
1611 | * combined into a -ENODATA return value. | |
1612 | */ | |
b6797c8e JG |
1613 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; |
1614 | goto end; | |
1615 | default: | |
1616 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
6f9449c2 JG |
1617 | goto end; |
1618 | } | |
1619 | ||
1620 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
b6797c8e JG |
1621 | stream, subbuffer); |
1622 | if (ret) { | |
1623 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1624 | } | |
6f9449c2 | 1625 | end: |
b6797c8e | 1626 | return status; |
6f9449c2 | 1627 | } |
128708c3 | 1628 | |
6f9449c2 | 1629 | static |
b6797c8e JG |
1630 | enum get_next_subbuffer_status get_next_subbuffer_splice( |
1631 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1632 | struct stream_subbuffer *subbuffer) |
1633 | { | |
b6797c8e JG |
1634 | const enum get_next_subbuffer_status status = |
1635 | get_subbuffer_common(stream, subbuffer); | |
1d4dfdef | 1636 | |
b6797c8e | 1637 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { |
6f9449c2 JG |
1638 | goto end; |
1639 | } | |
1d4dfdef | 1640 | |
6f9449c2 JG |
1641 | subbuffer->buffer.fd = stream->wait_fd; |
1642 | end: | |
b6797c8e | 1643 | return status; |
6f9449c2 | 1644 | } |
fd424d99 | 1645 | |
6f9449c2 | 1646 | static |
b6797c8e JG |
1647 | enum get_next_subbuffer_status get_next_subbuffer_mmap( |
1648 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1649 | struct stream_subbuffer *subbuffer) |
1650 | { | |
1651 | int ret; | |
b6797c8e | 1652 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1653 | const char *addr; |
1654 | ||
b6797c8e JG |
1655 | status = get_subbuffer_common(stream, subbuffer); |
1656 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { | |
6f9449c2 | 1657 | goto end; |
128708c3 | 1658 | } |
6f9449c2 JG |
1659 | |
1660 | ret = get_current_subbuf_addr(stream, &addr); | |
1661 | if (ret) { | |
b6797c8e | 1662 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
6f9449c2 | 1663 | goto end; |
d41f73b7 | 1664 | } |
6f9449c2 JG |
1665 | |
1666 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1667 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1668 | end: | |
b6797c8e | 1669 | return status; |
6f9449c2 JG |
1670 | } |
1671 | ||
f5ba75b4 | 1672 | static |
b6797c8e | 1673 | enum get_next_subbuffer_status get_next_subbuffer_metadata_check(struct lttng_consumer_stream *stream, |
f5ba75b4 JG |
1674 | struct stream_subbuffer *subbuffer) |
1675 | { | |
1676 | int ret; | |
1677 | const char *addr; | |
1678 | bool coherent; | |
b6797c8e | 1679 | enum get_next_subbuffer_status status; |
f5ba75b4 JG |
1680 | |
1681 | ret = kernctl_get_next_subbuf_metadata_check(stream->wait_fd, | |
1682 | &coherent); | |
1683 | if (ret) { | |
1684 | goto end; | |
1685 | } | |
1686 | ||
1687 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1688 | stream, subbuffer); | |
1689 | if (ret) { | |
1690 | goto end; | |
1691 | } | |
1692 | ||
1693 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
1694 | ||
1695 | ret = get_current_subbuf_addr(stream, &addr); | |
1696 | if (ret) { | |
1697 | goto end; | |
1698 | } | |
1699 | ||
1700 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1701 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1702 | DBG("Got metadata packet with padded_subbuf_size = %lu, coherent = %s", | |
1703 | subbuffer->info.metadata.padded_subbuf_size, | |
1704 | coherent ? "true" : "false"); | |
1705 | end: | |
6e5e3c51 MD |
1706 | /* |
1707 | * The caller only expects -ENODATA when there is no data to read, but | |
1708 | * the kernel tracer returns -EAGAIN when there is currently no data | |
1709 | * for a non-finalized stream, and -ENODATA when there is no data for a | |
1710 | * finalized stream. Those can be combined into a -ENODATA return value. | |
1711 | */ | |
b6797c8e JG |
1712 | switch (ret) { |
1713 | case 0: | |
1714 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1715 | break; | |
1716 | case -ENODATA: | |
1717 | case -EAGAIN: | |
1718 | /* | |
1719 | * The caller only expects -ENODATA when there is no data to | |
1720 | * read, but the kernel tracer returns -EAGAIN when there is | |
1721 | * currently no data for a non-finalized stream, and -ENODATA | |
1722 | * when there is no data for a finalized stream. Those can be | |
1723 | * combined into a -ENODATA return value. | |
1724 | */ | |
1725 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; | |
1726 | break; | |
1727 | default: | |
1728 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1729 | break; | |
6e5e3c51 MD |
1730 | } |
1731 | ||
b6797c8e | 1732 | return status; |
f5ba75b4 JG |
1733 | } |
1734 | ||
6f9449c2 JG |
1735 | static |
1736 | int put_next_subbuffer(struct lttng_consumer_stream *stream, | |
1737 | struct stream_subbuffer *subbuffer) | |
1738 | { | |
1739 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1740 | ||
1741 | if (ret) { | |
1742 | if (ret == -EFAULT) { | |
1743 | PERROR("Error in unreserving sub buffer"); | |
1744 | } else if (ret == -EIO) { | |
d41f73b7 | 1745 | /* Should never happen with newer LTTng versions */ |
6f9449c2 | 1746 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); |
d41f73b7 | 1747 | } |
d41f73b7 MD |
1748 | } |
1749 | ||
6f9449c2 JG |
1750 | return ret; |
1751 | } | |
1c20f0e2 | 1752 | |
f5ba75b4 JG |
1753 | static |
1754 | bool is_get_next_check_metadata_available(int tracer_fd) | |
1755 | { | |
741e787b JG |
1756 | const int ret = kernctl_get_next_subbuf_metadata_check(tracer_fd, NULL); |
1757 | const bool available = ret != -ENOTTY; | |
1758 | ||
1759 | if (ret == 0) { | |
1760 | /* get succeeded, make sure to put the subbuffer. */ | |
1761 | kernctl_put_subbuf(tracer_fd); | |
1762 | } | |
1763 | ||
1764 | return available; | |
f5ba75b4 JG |
1765 | } |
1766 | ||
091441eb MD |
1767 | static |
1768 | int signal_metadata(struct lttng_consumer_stream *stream, | |
1769 | struct lttng_consumer_local_data *ctx) | |
1770 | { | |
1771 | ASSERT_LOCKED(stream->metadata_rdv_lock); | |
1772 | return pthread_cond_broadcast(&stream->metadata_rdv) ? -errno : 0; | |
1773 | } | |
1774 | ||
f5ba75b4 JG |
1775 | static |
1776 | int lttng_kconsumer_set_stream_ops( | |
6f9449c2 JG |
1777 | struct lttng_consumer_stream *stream) |
1778 | { | |
f5ba75b4 JG |
1779 | int ret = 0; |
1780 | ||
1781 | if (stream->metadata_flag && stream->chan->is_live) { | |
1782 | DBG("Attempting to enable metadata bucketization for live consumers"); | |
1783 | if (is_get_next_check_metadata_available(stream->wait_fd)) { | |
1784 | DBG("Kernel tracer supports get_next_subbuffer_metadata_check, metadata will be accumulated until a coherent state is reached"); | |
1785 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1786 | get_next_subbuffer_metadata_check; | |
1787 | ret = consumer_stream_enable_metadata_bucketization( | |
1788 | stream); | |
1789 | if (ret) { | |
1790 | goto end; | |
1791 | } | |
1792 | } else { | |
1793 | /* | |
1794 | * The kernel tracer version is too old to indicate | |
1795 | * when the metadata stream has reached a "coherent" | |
1796 | * (parseable) point. | |
1797 | * | |
1798 | * This means that a live viewer may see an incoherent | |
1799 | * sequence of metadata and fail to parse it. | |
1800 | */ | |
1801 | WARN("Kernel tracer does not support get_next_subbuffer_metadata_check which may cause live clients to fail to parse the metadata stream"); | |
1802 | metadata_bucket_destroy(stream->metadata_bucket); | |
1803 | stream->metadata_bucket = NULL; | |
1804 | } | |
091441eb MD |
1805 | |
1806 | stream->read_subbuffer_ops.on_sleep = signal_metadata; | |
f5ba75b4 JG |
1807 | } |
1808 | ||
1809 | if (!stream->read_subbuffer_ops.get_next_subbuffer) { | |
1810 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
1811 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1812 | get_next_subbuffer_mmap; | |
1813 | } else { | |
1814 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1815 | get_next_subbuffer_splice; | |
1816 | } | |
94d49140 JD |
1817 | } |
1818 | ||
6f9449c2 JG |
1819 | if (stream->metadata_flag) { |
1820 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1821 | extract_metadata_subbuffer_info; | |
1822 | } else { | |
1823 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1824 | extract_data_subbuffer_info; | |
1825 | if (stream->chan->is_live) { | |
1826 | stream->read_subbuffer_ops.send_live_beacon = | |
1827 | consumer_flush_kernel_index; | |
1828 | } | |
309167d2 JD |
1829 | } |
1830 | ||
6f9449c2 | 1831 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; |
f5ba75b4 JG |
1832 | end: |
1833 | return ret; | |
d41f73b7 MD |
1834 | } |
1835 | ||
1836 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1837 | { | |
1838 | int ret; | |
ffe60014 | 1839 | |
a0377dfe | 1840 | LTTNG_ASSERT(stream); |
ffe60014 | 1841 | |
2bba9e53 | 1842 | /* |
d2956687 JG |
1843 | * Don't create anything if this is set for streaming or if there is |
1844 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1845 | */ |
d2956687 JG |
1846 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1847 | stream->chan->trace_chunk) { | |
1848 | ret = consumer_stream_create_output_files(stream, true); | |
1849 | if (ret) { | |
fe4477ee JD |
1850 | goto error; |
1851 | } | |
ffe60014 | 1852 | } |
d41f73b7 | 1853 | |
d41f73b7 MD |
1854 | if (stream->output == LTTNG_EVENT_MMAP) { |
1855 | /* get the len of the mmap region */ | |
1856 | unsigned long mmap_len; | |
1857 | ||
1858 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1859 | if (ret != 0) { | |
ffe60014 | 1860 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1861 | goto error_close_fd; |
1862 | } | |
1863 | stream->mmap_len = (size_t) mmap_len; | |
1864 | ||
ffe60014 DG |
1865 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1866 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1867 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1868 | PERROR("Error mmaping"); |
d41f73b7 MD |
1869 | ret = -1; |
1870 | goto error_close_fd; | |
1871 | } | |
1872 | } | |
1873 | ||
f5ba75b4 JG |
1874 | ret = lttng_kconsumer_set_stream_ops(stream); |
1875 | if (ret) { | |
1876 | goto error_close_fd; | |
1877 | } | |
6f9449c2 | 1878 | |
d41f73b7 MD |
1879 | /* we return 0 to let the library handle the FD internally */ |
1880 | return 0; | |
1881 | ||
1882 | error_close_fd: | |
2f225ce2 | 1883 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1884 | int err; |
1885 | ||
1886 | err = close(stream->out_fd); | |
a0377dfe | 1887 | LTTNG_ASSERT(!err); |
2f225ce2 | 1888 | stream->out_fd = -1; |
d41f73b7 MD |
1889 | } |
1890 | error: | |
1891 | return ret; | |
1892 | } | |
1893 | ||
ca22feea DG |
1894 | /* |
1895 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1896 | * stream. Consumer data lock MUST be acquired before calling this function |
1897 | * and the stream lock. | |
ca22feea | 1898 | * |
6d805429 | 1899 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1900 | * data is available for trace viewer reading. |
1901 | */ | |
6d805429 | 1902 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1903 | { |
1904 | int ret; | |
1905 | ||
a0377dfe | 1906 | LTTNG_ASSERT(stream); |
ca22feea | 1907 | |
873b9e9a MD |
1908 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1909 | ret = 0; | |
1910 | goto end; | |
1911 | } | |
1912 | ||
ca22feea DG |
1913 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1914 | if (ret == 0) { | |
1915 | /* There is still data so let's put back this subbuffer. */ | |
1916 | ret = kernctl_put_subbuf(stream->wait_fd); | |
a0377dfe | 1917 | LTTNG_ASSERT(ret == 0); |
6d805429 | 1918 | ret = 1; /* Data is pending */ |
4e9a4686 | 1919 | goto end; |
ca22feea DG |
1920 | } |
1921 | ||
6d805429 DG |
1922 | /* Data is NOT pending and ready to be read. */ |
1923 | ret = 0; | |
ca22feea | 1924 | |
6efae65e DG |
1925 | end: |
1926 | return ret; | |
ca22feea | 1927 | } |