Commit | Line | Data |
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3bd1e081 | 1 | /* |
90c106c6 | 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 | 11 | #include <assert.h> |
3bd1e081 MD |
12 | #include <poll.h> |
13 | #include <pthread.h> | |
14 | #include <stdlib.h> | |
15 | #include <string.h> | |
16 | #include <sys/mman.h> | |
17 | #include <sys/socket.h> | |
18 | #include <sys/types.h> | |
77c7c900 | 19 | #include <inttypes.h> |
3bd1e081 | 20 | #include <unistd.h> |
dbb5dfe6 | 21 | #include <sys/stat.h> |
f5ba75b4 | 22 | #include <stdint.h> |
3bd1e081 | 23 | |
51a9e1c7 | 24 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 25 | #include <common/common.h> |
10a8a223 | 26 | #include <common/kernel-ctl/kernel-ctl.h> |
10a8a223 | 27 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 28 | #include <common/sessiond-comm/relayd.h> |
dbb5dfe6 | 29 | #include <common/compat/fcntl.h> |
f263b7fd | 30 | #include <common/compat/endian.h> |
acdb9057 | 31 | #include <common/pipe.h> |
00e2e675 | 32 | #include <common/relayd/relayd.h> |
fe4477ee | 33 | #include <common/utils.h> |
c8fea79c | 34 | #include <common/consumer/consumer-stream.h> |
309167d2 | 35 | #include <common/index/index.h> |
c8fea79c | 36 | #include <common/consumer/consumer-timer.h> |
d2956687 | 37 | #include <common/optional.h> |
6f9449c2 JG |
38 | #include <common/buffer-view.h> |
39 | #include <common/consumer/consumer.h> | |
f5ba75b4 | 40 | #include <common/consumer/metadata-bucket.h> |
0857097f | 41 | |
10a8a223 | 42 | #include "kernel-consumer.h" |
3bd1e081 | 43 | |
fa29bfbf | 44 | extern struct lttng_consumer_global_data the_consumer_data; |
3bd1e081 | 45 | extern int consumer_poll_timeout; |
3bd1e081 | 46 | |
3bd1e081 MD |
47 | /* |
48 | * Take a snapshot for a specific fd | |
49 | * | |
50 | * Returns 0 on success, < 0 on error | |
51 | */ | |
ffe60014 | 52 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
53 | { |
54 | int ret = 0; | |
55 | int infd = stream->wait_fd; | |
56 | ||
57 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
58 | /* |
59 | * -EAGAIN is not an error, it just means that there is no data to | |
60 | * be read. | |
61 | */ | |
62 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 63 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
64 | } |
65 | ||
66 | return ret; | |
67 | } | |
68 | ||
e9404c27 JG |
69 | /* |
70 | * Sample consumed and produced positions for a specific fd. | |
71 | * | |
72 | * Returns 0 on success, < 0 on error. | |
73 | */ | |
74 | int lttng_kconsumer_sample_snapshot_positions( | |
75 | struct lttng_consumer_stream *stream) | |
76 | { | |
77 | assert(stream); | |
78 | ||
79 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
80 | } | |
81 | ||
3bd1e081 MD |
82 | /* |
83 | * Get the produced position | |
84 | * | |
85 | * Returns 0 on success, < 0 on error | |
86 | */ | |
ffe60014 | 87 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
88 | unsigned long *pos) |
89 | { | |
90 | int ret; | |
91 | int infd = stream->wait_fd; | |
92 | ||
93 | ret = kernctl_snapshot_get_produced(infd, pos); | |
94 | if (ret != 0) { | |
5a510c9f | 95 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
96 | } |
97 | ||
98 | return ret; | |
99 | } | |
100 | ||
07b86b52 JD |
101 | /* |
102 | * Get the consumerd position | |
103 | * | |
104 | * Returns 0 on success, < 0 on error | |
105 | */ | |
106 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
107 | unsigned long *pos) | |
108 | { | |
109 | int ret; | |
110 | int infd = stream->wait_fd; | |
111 | ||
112 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
113 | if (ret != 0) { | |
5a510c9f | 114 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
115 | } |
116 | ||
117 | return ret; | |
118 | } | |
119 | ||
128708c3 JG |
120 | static |
121 | int get_current_subbuf_addr(struct lttng_consumer_stream *stream, | |
122 | const char **addr) | |
123 | { | |
124 | int ret; | |
125 | unsigned long mmap_offset; | |
126 | const char *mmap_base = stream->mmap_base; | |
127 | ||
128 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
129 | if (ret < 0) { | |
130 | PERROR("Failed to get mmap read offset"); | |
131 | goto error; | |
132 | } | |
133 | ||
134 | *addr = mmap_base + mmap_offset; | |
135 | error: | |
136 | return ret; | |
137 | } | |
138 | ||
07b86b52 JD |
139 | /* |
140 | * Take a snapshot of all the stream of a channel | |
3eb928aa | 141 | * RCU read-side lock must be held across this function to ensure existence of |
a48ac75a | 142 | * channel. |
07b86b52 JD |
143 | * |
144 | * Returns 0 on success, < 0 on error | |
145 | */ | |
f72bb42f JG |
146 | static int lttng_kconsumer_snapshot_channel( |
147 | struct lttng_consumer_channel *channel, | |
148 | uint64_t key, char *path, uint64_t relayd_id, | |
149 | uint64_t nb_packets_per_stream, | |
5c786ded | 150 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
151 | { |
152 | int ret; | |
07b86b52 JD |
153 | struct lttng_consumer_stream *stream; |
154 | ||
6a00837f | 155 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 | 156 | |
a48ac75a JR |
157 | /* Prevent channel modifications while we perform the snapshot.*/ |
158 | pthread_mutex_lock(&channel->lock); | |
159 | ||
07b86b52 JD |
160 | rcu_read_lock(); |
161 | ||
07b86b52 JD |
162 | /* Splice is not supported yet for channel snapshot. */ |
163 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
9381314c JG |
164 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
165 | channel->name); | |
07b86b52 JD |
166 | ret = -1; |
167 | goto end; | |
168 | } | |
169 | ||
10a50311 | 170 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 171 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
172 | |
173 | health_code_update(); | |
174 | ||
07b86b52 JD |
175 | /* |
176 | * Lock stream because we are about to change its state. | |
177 | */ | |
178 | pthread_mutex_lock(&stream->lock); | |
179 | ||
d2956687 JG |
180 | assert(channel->trace_chunk); |
181 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { | |
182 | /* | |
183 | * Can't happen barring an internal error as the channel | |
184 | * holds a reference to the trace chunk. | |
185 | */ | |
186 | ERR("Failed to acquire reference to channel's trace chunk"); | |
187 | ret = -1; | |
188 | goto end_unlock; | |
189 | } | |
190 | assert(!stream->trace_chunk); | |
191 | stream->trace_chunk = channel->trace_chunk; | |
192 | ||
29decac3 DG |
193 | /* |
194 | * Assign the received relayd ID so we can use it for streaming. The streams | |
195 | * are not visible to anyone so this is OK to change it. | |
196 | */ | |
07b86b52 JD |
197 | stream->net_seq_idx = relayd_id; |
198 | channel->relayd_id = relayd_id; | |
199 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 200 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
201 | if (ret < 0) { |
202 | ERR("sending stream to relayd"); | |
203 | goto end_unlock; | |
204 | } | |
07b86b52 | 205 | } else { |
d2956687 JG |
206 | ret = consumer_stream_create_output_files(stream, |
207 | false); | |
07b86b52 | 208 | if (ret < 0) { |
07b86b52 JD |
209 | goto end_unlock; |
210 | } | |
d2956687 JG |
211 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
212 | stream->key); | |
07b86b52 JD |
213 | } |
214 | ||
f22dd891 | 215 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 216 | if (ret < 0) { |
f22dd891 MD |
217 | /* |
218 | * Doing a buffer flush which does not take into | |
219 | * account empty packets. This is not perfect | |
220 | * for stream intersection, but required as a | |
221 | * fall-back when "flush_empty" is not | |
222 | * implemented by lttng-modules. | |
223 | */ | |
224 | ret = kernctl_buffer_flush(stream->wait_fd); | |
225 | if (ret < 0) { | |
226 | ERR("Failed to flush kernel stream"); | |
227 | goto end_unlock; | |
228 | } | |
07b86b52 JD |
229 | goto end_unlock; |
230 | } | |
231 | ||
232 | ret = lttng_kconsumer_take_snapshot(stream); | |
233 | if (ret < 0) { | |
234 | ERR("Taking kernel snapshot"); | |
235 | goto end_unlock; | |
236 | } | |
237 | ||
238 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
239 | if (ret < 0) { | |
240 | ERR("Produced kernel snapshot position"); | |
241 | goto end_unlock; | |
242 | } | |
243 | ||
244 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
245 | if (ret < 0) { | |
246 | ERR("Consumerd kernel snapshot position"); | |
247 | goto end_unlock; | |
248 | } | |
249 | ||
d07ceecd MD |
250 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
251 | produced_pos, nb_packets_per_stream, | |
252 | stream->max_sb_size); | |
5c786ded | 253 | |
9377d830 | 254 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
255 | ssize_t read_len; |
256 | unsigned long len, padded_len; | |
128708c3 | 257 | const char *subbuf_addr; |
fd424d99 | 258 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 259 | |
9ce5646a | 260 | health_code_update(); |
07b86b52 JD |
261 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
262 | ||
263 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
264 | if (ret < 0) { | |
32af2c95 | 265 | if (ret != -EAGAIN) { |
07b86b52 JD |
266 | PERROR("kernctl_get_subbuf snapshot"); |
267 | goto end_unlock; | |
268 | } | |
269 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
270 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 271 | stream->chan->lost_packets++; |
07b86b52 JD |
272 | continue; |
273 | } | |
274 | ||
275 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
276 | if (ret < 0) { | |
277 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 278 | goto error_put_subbuf; |
07b86b52 JD |
279 | } |
280 | ||
281 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
282 | if (ret < 0) { | |
283 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 284 | goto error_put_subbuf; |
07b86b52 JD |
285 | } |
286 | ||
128708c3 JG |
287 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
288 | if (ret) { | |
289 | goto error_put_subbuf; | |
290 | } | |
291 | ||
fd424d99 JG |
292 | subbuf_view = lttng_buffer_view_init( |
293 | subbuf_addr, 0, padded_len); | |
f5ba75b4 | 294 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
fd424d99 | 295 | stream, &subbuf_view, |
6f9449c2 | 296 | padded_len - len); |
07b86b52 | 297 | /* |
29decac3 DG |
298 | * We write the padded len in local tracefiles but the data len |
299 | * when using a relay. Display the error but continue processing | |
300 | * to try to release the subbuffer. | |
07b86b52 JD |
301 | */ |
302 | if (relayd_id != (uint64_t) -1ULL) { | |
303 | if (read_len != len) { | |
304 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
305 | read_len, len); | |
306 | } | |
307 | } else { | |
308 | if (read_len != padded_len) { | |
309 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
310 | read_len, padded_len); | |
311 | } | |
312 | } | |
313 | ||
314 | ret = kernctl_put_subbuf(stream->wait_fd); | |
315 | if (ret < 0) { | |
316 | ERR("Snapshot kernctl_put_subbuf"); | |
317 | goto end_unlock; | |
318 | } | |
319 | consumed_pos += stream->max_sb_size; | |
320 | } | |
321 | ||
322 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
323 | if (stream->out_fd >= 0) { |
324 | ret = close(stream->out_fd); | |
325 | if (ret < 0) { | |
326 | PERROR("Kernel consumer snapshot close out_fd"); | |
327 | goto end_unlock; | |
328 | } | |
329 | stream->out_fd = -1; | |
07b86b52 | 330 | } |
07b86b52 JD |
331 | } else { |
332 | close_relayd_stream(stream); | |
333 | stream->net_seq_idx = (uint64_t) -1ULL; | |
334 | } | |
d2956687 JG |
335 | lttng_trace_chunk_put(stream->trace_chunk); |
336 | stream->trace_chunk = NULL; | |
07b86b52 JD |
337 | pthread_mutex_unlock(&stream->lock); |
338 | } | |
339 | ||
340 | /* All good! */ | |
341 | ret = 0; | |
342 | goto end; | |
343 | ||
29decac3 DG |
344 | error_put_subbuf: |
345 | ret = kernctl_put_subbuf(stream->wait_fd); | |
346 | if (ret < 0) { | |
347 | ERR("Snapshot kernctl_put_subbuf error path"); | |
348 | } | |
07b86b52 JD |
349 | end_unlock: |
350 | pthread_mutex_unlock(&stream->lock); | |
351 | end: | |
352 | rcu_read_unlock(); | |
a48ac75a | 353 | pthread_mutex_unlock(&channel->lock); |
07b86b52 JD |
354 | return ret; |
355 | } | |
356 | ||
357 | /* | |
358 | * Read the whole metadata available for a snapshot. | |
3eb928aa | 359 | * RCU read-side lock must be held across this function to ensure existence of |
a48ac75a | 360 | * metadata_channel. |
07b86b52 JD |
361 | * |
362 | * Returns 0 on success, < 0 on error | |
363 | */ | |
d2956687 JG |
364 | static int lttng_kconsumer_snapshot_metadata( |
365 | struct lttng_consumer_channel *metadata_channel, | |
3eb928aa MD |
366 | uint64_t key, char *path, uint64_t relayd_id, |
367 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 368 | { |
d771f832 DG |
369 | int ret, use_relayd = 0; |
370 | ssize_t ret_read; | |
07b86b52 | 371 | struct lttng_consumer_stream *metadata_stream; |
d771f832 DG |
372 | |
373 | assert(ctx); | |
07b86b52 JD |
374 | |
375 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
376 | key, path); | |
377 | ||
378 | rcu_read_lock(); | |
379 | ||
07b86b52 JD |
380 | metadata_stream = metadata_channel->metadata_stream; |
381 | assert(metadata_stream); | |
d2956687 | 382 | |
a48ac75a | 383 | metadata_stream->read_subbuffer_ops.lock(metadata_stream); |
d2956687 JG |
384 | assert(metadata_channel->trace_chunk); |
385 | assert(metadata_stream->trace_chunk); | |
07b86b52 | 386 | |
d771f832 | 387 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 388 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
389 | use_relayd = 1; |
390 | } | |
391 | ||
392 | if (use_relayd) { | |
10a50311 | 393 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 394 | if (ret < 0) { |
fa27abe8 | 395 | goto error_snapshot; |
e2039c7a | 396 | } |
e2039c7a | 397 | } else { |
d2956687 JG |
398 | ret = consumer_stream_create_output_files(metadata_stream, |
399 | false); | |
e2039c7a | 400 | if (ret < 0) { |
fa27abe8 | 401 | goto error_snapshot; |
e2039c7a | 402 | } |
07b86b52 | 403 | } |
07b86b52 | 404 | |
d771f832 | 405 | do { |
9ce5646a MD |
406 | health_code_update(); |
407 | ||
6f9449c2 | 408 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 409 | if (ret_read < 0) { |
684c6783 MD |
410 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
411 | ret_read); | |
412 | ret = ret_read; | |
413 | goto error_snapshot; | |
07b86b52 | 414 | } |
684c6783 | 415 | } while (ret_read > 0); |
07b86b52 | 416 | |
d771f832 DG |
417 | if (use_relayd) { |
418 | close_relayd_stream(metadata_stream); | |
419 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
420 | } else { | |
fdf9986c MD |
421 | if (metadata_stream->out_fd >= 0) { |
422 | ret = close(metadata_stream->out_fd); | |
423 | if (ret < 0) { | |
424 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
425 | /* | |
426 | * Don't go on error here since the snapshot was successful at this | |
427 | * point but somehow the close failed. | |
428 | */ | |
429 | } | |
430 | metadata_stream->out_fd = -1; | |
d2956687 JG |
431 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
432 | metadata_stream->trace_chunk = NULL; | |
e2039c7a | 433 | } |
e2039c7a JD |
434 | } |
435 | ||
07b86b52 | 436 | ret = 0; |
fa27abe8 | 437 | error_snapshot: |
a48ac75a | 438 | metadata_stream->read_subbuffer_ops.unlock(metadata_stream); |
cf53a8a6 JD |
439 | cds_list_del(&metadata_stream->send_node); |
440 | consumer_stream_destroy(metadata_stream, NULL); | |
441 | metadata_channel->metadata_stream = NULL; | |
07b86b52 JD |
442 | rcu_read_unlock(); |
443 | return ret; | |
444 | } | |
445 | ||
1803a064 MD |
446 | /* |
447 | * Receive command from session daemon and process it. | |
448 | * | |
449 | * Return 1 on success else a negative value or 0. | |
450 | */ | |
3bd1e081 MD |
451 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
452 | int sock, struct pollfd *consumer_sockpoll) | |
453 | { | |
0c5b3718 | 454 | int ret_func; |
0c759fc9 | 455 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
456 | struct lttcomm_consumer_msg msg; |
457 | ||
9ce5646a MD |
458 | health_code_update(); |
459 | ||
0c5b3718 SM |
460 | { |
461 | ssize_t ret_recv; | |
462 | ||
463 | ret_recv = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
464 | if (ret_recv != sizeof(msg)) { | |
465 | if (ret_recv > 0) { | |
466 | lttng_consumer_send_error(ctx, | |
467 | LTTCOMM_CONSUMERD_ERROR_RECV_CMD); | |
468 | ret_recv = -1; | |
469 | } | |
470 | return ret_recv; | |
1803a064 | 471 | } |
3bd1e081 | 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; | |
afbf29db | 497 | int ret_send_status, ret_add_channel = 0; |
d2956687 | 498 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 499 | |
9ce5646a MD |
500 | health_code_update(); |
501 | ||
f50f23d9 | 502 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
503 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
504 | if (ret_send_status < 0) { | |
f50f23d9 | 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, |
d2956687 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, |
a2814ea7 | 523 | msg.u.channel.is_live, |
3d071855 | 524 | NULL, NULL); |
3bd1e081 | 525 | if (new_channel == NULL) { |
f73fabfd | 526 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
527 | goto end_nosignal; |
528 | } | |
ffe60014 | 529 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
530 | switch (msg.u.channel.output) { |
531 | case LTTNG_EVENT_SPLICE: | |
532 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
533 | break; | |
534 | case LTTNG_EVENT_MMAP: | |
535 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
536 | break; | |
537 | default: | |
538 | ERR("Channel output unknown %d", msg.u.channel.output); | |
539 | goto end_nosignal; | |
540 | } | |
ffe60014 DG |
541 | |
542 | /* Translate and save channel type. */ | |
543 | switch (msg.u.channel.type) { | |
544 | case CONSUMER_CHANNEL_TYPE_DATA: | |
545 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
546 | new_channel->type = msg.u.channel.type; | |
547 | break; | |
548 | default: | |
549 | assert(0); | |
550 | goto end_nosignal; | |
551 | }; | |
552 | ||
9ce5646a MD |
553 | health_code_update(); |
554 | ||
3bd1e081 | 555 | if (ctx->on_recv_channel != NULL) { |
0c5b3718 SM |
556 | int ret_recv_channel = |
557 | ctx->on_recv_channel(new_channel); | |
558 | if (ret_recv_channel == 0) { | |
559 | ret_add_channel = consumer_add_channel( | |
560 | new_channel, ctx); | |
561 | } else if (ret_recv_channel < 0) { | |
3bd1e081 MD |
562 | goto end_nosignal; |
563 | } | |
564 | } else { | |
0c5b3718 SM |
565 | ret_add_channel = |
566 | consumer_add_channel(new_channel, ctx); | |
3bd1e081 | 567 | } |
0c5b3718 SM |
568 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && |
569 | !ret_add_channel) { | |
e9404c27 JG |
570 | int monitor_start_ret; |
571 | ||
572 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
573 | consumer_timer_live_start(new_channel, |
574 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
575 | monitor_start_ret = consumer_timer_monitor_start( |
576 | new_channel, | |
577 | msg.u.channel.monitor_timer_interval); | |
578 | if (monitor_start_ret < 0) { | |
579 | ERR("Starting channel monitoring timer failed"); | |
580 | goto end_nosignal; | |
581 | } | |
94d49140 | 582 | } |
e43c41c5 | 583 | |
9ce5646a MD |
584 | health_code_update(); |
585 | ||
e43c41c5 | 586 | /* If we received an error in add_channel, we need to report it. */ |
0c5b3718 SM |
587 | if (ret_add_channel < 0) { |
588 | ret_send_status = consumer_send_status_msg( | |
589 | sock, ret_add_channel); | |
590 | if (ret_send_status < 0) { | |
1803a064 MD |
591 | goto error_fatal; |
592 | } | |
e43c41c5 JD |
593 | goto end_nosignal; |
594 | } | |
595 | ||
3bd1e081 MD |
596 | goto end_nosignal; |
597 | } | |
598 | case LTTNG_CONSUMER_ADD_STREAM: | |
599 | { | |
dae10966 DG |
600 | int fd; |
601 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 602 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 603 | struct lttng_consumer_channel *channel; |
c80048c6 | 604 | int alloc_ret = 0; |
0c5b3718 SM |
605 | int ret_send_status, ret_poll, ret_get_max_subbuf_size; |
606 | ssize_t ret_pipe_write, ret_recv; | |
3bd1e081 | 607 | |
ffe60014 DG |
608 | /* |
609 | * Get stream's channel reference. Needed when adding the stream to the | |
610 | * global hash table. | |
611 | */ | |
612 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
613 | if (!channel) { | |
614 | /* | |
615 | * We could not find the channel. Can happen if cpu hotplug | |
616 | * happens while tearing down. | |
617 | */ | |
d88aee68 | 618 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 619 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
620 | } |
621 | ||
9ce5646a MD |
622 | health_code_update(); |
623 | ||
f50f23d9 | 624 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
625 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
626 | if (ret_send_status < 0) { | |
d771f832 | 627 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 628 | goto error_add_stream_fatal; |
1803a064 | 629 | } |
9ce5646a MD |
630 | |
631 | health_code_update(); | |
632 | ||
0c759fc9 | 633 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 634 | /* Channel was not found. */ |
c5c7998f | 635 | goto error_add_stream_nosignal; |
f50f23d9 DG |
636 | } |
637 | ||
d771f832 | 638 | /* Blocking call */ |
9ce5646a | 639 | health_poll_entry(); |
0c5b3718 | 640 | ret_poll = lttng_consumer_poll_socket(consumer_sockpoll); |
9ce5646a | 641 | health_poll_exit(); |
0c5b3718 | 642 | if (ret_poll) { |
c5c7998f | 643 | goto error_add_stream_fatal; |
3bd1e081 | 644 | } |
00e2e675 | 645 | |
9ce5646a MD |
646 | health_code_update(); |
647 | ||
00e2e675 | 648 | /* Get stream file descriptor from socket */ |
0c5b3718 SM |
649 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
650 | if (ret_recv != sizeof(fd)) { | |
f73fabfd | 651 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
0c5b3718 | 652 | ret_func = ret_recv; |
c5c7998f | 653 | goto end; |
3bd1e081 | 654 | } |
3bd1e081 | 655 | |
9ce5646a MD |
656 | health_code_update(); |
657 | ||
f50f23d9 DG |
658 | /* |
659 | * Send status code to session daemon only if the recv works. If the | |
660 | * above recv() failed, the session daemon is notified through the | |
661 | * error socket and the teardown is eventually done. | |
662 | */ | |
0c5b3718 SM |
663 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
664 | if (ret_send_status < 0) { | |
f50f23d9 | 665 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 666 | goto error_add_stream_nosignal; |
f50f23d9 DG |
667 | } |
668 | ||
9ce5646a MD |
669 | health_code_update(); |
670 | ||
d2956687 | 671 | pthread_mutex_lock(&channel->lock); |
6f9449c2 | 672 | new_stream = consumer_stream_create( |
49f45573 JG |
673 | channel, |
674 | channel->key, | |
ffe60014 | 675 | fd, |
ffe60014 | 676 | channel->name, |
ffe60014 DG |
677 | channel->relayd_id, |
678 | channel->session_id, | |
d2956687 | 679 | channel->trace_chunk, |
ffe60014 DG |
680 | msg.u.stream.cpu, |
681 | &alloc_ret, | |
4891ece8 | 682 | channel->type, |
d2956687 | 683 | channel->monitor); |
3bd1e081 | 684 | if (new_stream == NULL) { |
c80048c6 MD |
685 | switch (alloc_ret) { |
686 | case -ENOMEM: | |
687 | case -EINVAL: | |
688 | default: | |
689 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
690 | break; | |
c80048c6 | 691 | } |
d2956687 | 692 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 693 | goto error_add_stream_nosignal; |
3bd1e081 | 694 | } |
d771f832 | 695 | |
ffe60014 | 696 | new_stream->wait_fd = fd; |
0c5b3718 SM |
697 | ret_get_max_subbuf_size = kernctl_get_max_subbuf_size( |
698 | new_stream->wait_fd, &new_stream->max_sb_size); | |
699 | if (ret_get_max_subbuf_size < 0) { | |
d05185fa JG |
700 | pthread_mutex_unlock(&channel->lock); |
701 | ERR("Failed to get kernel maximal subbuffer size"); | |
c5c7998f | 702 | goto error_add_stream_nosignal; |
d05185fa JG |
703 | } |
704 | ||
d9a2e16e JD |
705 | consumer_stream_update_channel_attributes(new_stream, |
706 | channel); | |
00e2e675 | 707 | |
a0c83db9 DG |
708 | /* |
709 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
710 | * refcount right now. We don't need to increment the refcount for |
711 | * streams in no monitor because we handle manually the cleanup of | |
712 | * those. It is very important to make sure there is NO prior | |
713 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 714 | */ |
07b86b52 JD |
715 | if (channel->monitor) { |
716 | uatomic_inc(&new_stream->chan->refcount); | |
717 | } | |
9d9353f9 | 718 | |
fb3a43a9 DG |
719 | /* |
720 | * The buffer flush is done on the session daemon side for the kernel | |
721 | * so no need for the stream "hangup_flush_done" variable to be | |
722 | * tracked. This is important for a kernel stream since we don't rely | |
723 | * on the flush state of the stream to read data. It's not the case for | |
724 | * user space tracing. | |
725 | */ | |
726 | new_stream->hangup_flush_done = 0; | |
727 | ||
9ce5646a MD |
728 | health_code_update(); |
729 | ||
d2956687 | 730 | pthread_mutex_lock(&new_stream->lock); |
633d0084 | 731 | if (ctx->on_recv_stream) { |
0c5b3718 SM |
732 | int ret_recv_stream = ctx->on_recv_stream(new_stream); |
733 | if (ret_recv_stream < 0) { | |
d2956687 JG |
734 | pthread_mutex_unlock(&new_stream->lock); |
735 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 736 | consumer_stream_free(new_stream); |
c5c7998f | 737 | goto error_add_stream_nosignal; |
fb3a43a9 | 738 | } |
633d0084 | 739 | } |
9ce5646a MD |
740 | health_code_update(); |
741 | ||
07b86b52 JD |
742 | if (new_stream->metadata_flag) { |
743 | channel->metadata_stream = new_stream; | |
744 | } | |
745 | ||
2bba9e53 DG |
746 | /* Do not monitor this stream. */ |
747 | if (!channel->monitor) { | |
5eecee74 | 748 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 749 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 750 | new_stream->net_seq_idx); |
10a50311 | 751 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
d2956687 JG |
752 | pthread_mutex_unlock(&new_stream->lock); |
753 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 754 | goto end_add_stream; |
6dc3064a DG |
755 | } |
756 | ||
e1b71bdc DG |
757 | /* Send stream to relayd if the stream has an ID. */ |
758 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
759 | int ret_send_relayd_stream; |
760 | ||
761 | ret_send_relayd_stream = consumer_send_relayd_stream( | |
762 | new_stream, new_stream->chan->pathname); | |
763 | if (ret_send_relayd_stream < 0) { | |
d2956687 JG |
764 | pthread_mutex_unlock(&new_stream->lock); |
765 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 766 | consumer_stream_free(new_stream); |
c5c7998f | 767 | goto error_add_stream_nosignal; |
e1b71bdc | 768 | } |
001b7e62 MD |
769 | |
770 | /* | |
771 | * If adding an extra stream to an already | |
772 | * existing channel (e.g. cpu hotplug), we need | |
773 | * to send the "streams_sent" command to relayd. | |
774 | */ | |
775 | if (channel->streams_sent_to_relayd) { | |
0c5b3718 SM |
776 | int ret_send_relayd_streams_sent; |
777 | ||
778 | ret_send_relayd_streams_sent = | |
779 | consumer_send_relayd_streams_sent( | |
780 | new_stream->net_seq_idx); | |
781 | if (ret_send_relayd_streams_sent < 0) { | |
d2956687 JG |
782 | pthread_mutex_unlock(&new_stream->lock); |
783 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 784 | goto error_add_stream_nosignal; |
001b7e62 MD |
785 | } |
786 | } | |
e2039c7a | 787 | } |
d2956687 JG |
788 | pthread_mutex_unlock(&new_stream->lock); |
789 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 790 | |
50f8ae69 | 791 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 792 | if (new_stream->metadata_flag) { |
66d583dc | 793 | consumer_add_metadata_stream(new_stream); |
dae10966 | 794 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 795 | } else { |
66d583dc | 796 | consumer_add_data_stream(new_stream); |
dae10966 | 797 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
798 | } |
799 | ||
66d583dc | 800 | /* Visible to other threads */ |
5ab66908 MD |
801 | new_stream->globally_visible = 1; |
802 | ||
9ce5646a MD |
803 | health_code_update(); |
804 | ||
0c5b3718 SM |
805 | ret_pipe_write = lttng_pipe_write( |
806 | stream_pipe, &new_stream, sizeof(new_stream)); | |
807 | if (ret_pipe_write < 0) { | |
dae10966 | 808 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 809 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 810 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
811 | if (new_stream->metadata_flag) { |
812 | consumer_del_stream_for_metadata(new_stream); | |
813 | } else { | |
814 | consumer_del_stream_for_data(new_stream); | |
815 | } | |
c5c7998f | 816 | goto error_add_stream_nosignal; |
3bd1e081 | 817 | } |
00e2e675 | 818 | |
02d02e31 JD |
819 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
820 | new_stream->name, fd, new_stream->chan->pathname, new_stream->relayd_stream_id); | |
c5c7998f | 821 | end_add_stream: |
3bd1e081 | 822 | break; |
c5c7998f JG |
823 | error_add_stream_nosignal: |
824 | goto end_nosignal; | |
825 | error_add_stream_fatal: | |
826 | goto error_fatal; | |
3bd1e081 | 827 | } |
a4baae1b JD |
828 | case LTTNG_CONSUMER_STREAMS_SENT: |
829 | { | |
830 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 831 | int ret_send_status; |
a4baae1b JD |
832 | |
833 | /* | |
834 | * Get stream's channel reference. Needed when adding the stream to the | |
835 | * global hash table. | |
836 | */ | |
837 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
838 | if (!channel) { | |
839 | /* | |
840 | * We could not find the channel. Can happen if cpu hotplug | |
841 | * happens while tearing down. | |
842 | */ | |
843 | ERR("Unable to find channel key %" PRIu64, | |
844 | msg.u.sent_streams.channel_key); | |
e462382a | 845 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
846 | } |
847 | ||
848 | health_code_update(); | |
849 | ||
850 | /* | |
851 | * Send status code to session daemon. | |
852 | */ | |
0c5b3718 SM |
853 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
854 | if (ret_send_status < 0 || | |
855 | ret_code != LTTCOMM_CONSUMERD_SUCCESS) { | |
a4baae1b | 856 | /* Somehow, the session daemon is not responding anymore. */ |
80d5a658 | 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) { | |
80d5a658 | 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) { | |
0c5b3718 SM |
873 | int ret_send_relay_streams; |
874 | ||
875 | ret_send_relay_streams = consumer_send_relayd_streams_sent( | |
a4baae1b | 876 | msg.u.sent_streams.net_seq_idx); |
0c5b3718 | 877 | if (ret_send_relay_streams < 0) { |
80d5a658 | 878 | goto error_streams_sent_nosignal; |
a4baae1b | 879 | } |
001b7e62 | 880 | channel->streams_sent_to_relayd = true; |
a4baae1b | 881 | } |
80d5a658 | 882 | end_error_streams_sent: |
a4baae1b | 883 | break; |
80d5a658 JG |
884 | error_streams_sent_nosignal: |
885 | goto end_nosignal; | |
a4baae1b | 886 | } |
3bd1e081 MD |
887 | case LTTNG_CONSUMER_UPDATE_STREAM: |
888 | { | |
3f8e211f DG |
889 | rcu_read_unlock(); |
890 | return -ENOSYS; | |
891 | } | |
892 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
893 | { | |
a6ba4fe1 | 894 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f | 895 | struct consumer_relayd_sock_pair *relayd; |
0c5b3718 | 896 | int ret_send_status; |
3f8e211f | 897 | |
a6ba4fe1 | 898 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
899 | |
900 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 901 | relayd = consumer_find_relayd(index); |
3f8e211f | 902 | if (relayd == NULL) { |
3448e266 | 903 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 904 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 905 | } |
3f8e211f | 906 | |
a6ba4fe1 DG |
907 | /* |
908 | * Each relayd socket pair has a refcount of stream attached to it | |
909 | * which tells if the relayd is still active or not depending on the | |
910 | * refcount value. | |
911 | * | |
912 | * This will set the destroy flag of the relayd object and destroy it | |
913 | * if the refcount reaches zero when called. | |
914 | * | |
915 | * The destroy can happen either here or when a stream fd hangs up. | |
916 | */ | |
f50f23d9 DG |
917 | if (relayd) { |
918 | consumer_flag_relayd_for_destroy(relayd); | |
919 | } | |
920 | ||
9ce5646a MD |
921 | health_code_update(); |
922 | ||
0c5b3718 SM |
923 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
924 | if (ret_send_status < 0) { | |
f50f23d9 | 925 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 926 | goto error_fatal; |
f50f23d9 | 927 | } |
3f8e211f | 928 | |
3f8e211f | 929 | goto end_nosignal; |
3bd1e081 | 930 | } |
6d805429 | 931 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 932 | { |
0c5b3718 | 933 | int32_t ret_data_pending; |
6d805429 | 934 | uint64_t id = msg.u.data_pending.session_id; |
0c5b3718 | 935 | ssize_t ret_send; |
c8f59ee5 | 936 | |
6d805429 | 937 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 938 | |
0c5b3718 | 939 | ret_data_pending = consumer_data_pending(id); |
c8f59ee5 | 940 | |
9ce5646a MD |
941 | health_code_update(); |
942 | ||
c8f59ee5 | 943 | /* Send back returned value to session daemon */ |
0c5b3718 SM |
944 | ret_send = lttcomm_send_unix_sock(sock, &ret_data_pending, |
945 | sizeof(ret_data_pending)); | |
946 | if (ret_send < 0) { | |
6d805429 | 947 | PERROR("send data pending ret code"); |
1803a064 | 948 | goto error_fatal; |
c8f59ee5 | 949 | } |
f50f23d9 DG |
950 | |
951 | /* | |
952 | * No need to send back a status message since the data pending | |
953 | * returned value is the response. | |
954 | */ | |
c8f59ee5 | 955 | break; |
53632229 | 956 | } |
6dc3064a DG |
957 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
958 | { | |
3eb928aa MD |
959 | struct lttng_consumer_channel *channel; |
960 | uint64_t key = msg.u.snapshot_channel.key; | |
0c5b3718 | 961 | int ret_send_status; |
3eb928aa MD |
962 | |
963 | channel = consumer_find_channel(key); | |
964 | if (!channel) { | |
965 | ERR("Channel %" PRIu64 " not found", key); | |
966 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 967 | } else { |
3eb928aa | 968 | if (msg.u.snapshot_channel.metadata == 1) { |
0c5b3718 SM |
969 | int ret_snapshot; |
970 | ||
971 | ret_snapshot = lttng_kconsumer_snapshot_metadata( | |
972 | channel, key, | |
3eb928aa | 973 | msg.u.snapshot_channel.pathname, |
0c5b3718 SM |
974 | msg.u.snapshot_channel.relayd_id, |
975 | ctx); | |
976 | if (ret_snapshot < 0) { | |
3eb928aa MD |
977 | ERR("Snapshot metadata failed"); |
978 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
979 | } | |
980 | } else { | |
0c5b3718 SM |
981 | int ret_snapshot; |
982 | ||
983 | ret_snapshot = lttng_kconsumer_snapshot_channel( | |
984 | channel, key, | |
3eb928aa MD |
985 | msg.u.snapshot_channel.pathname, |
986 | msg.u.snapshot_channel.relayd_id, | |
0c5b3718 SM |
987 | msg.u.snapshot_channel |
988 | .nb_packets_per_stream, | |
3eb928aa | 989 | ctx); |
0c5b3718 | 990 | if (ret_snapshot < 0) { |
3eb928aa MD |
991 | ERR("Snapshot channel failed"); |
992 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
993 | } | |
07b86b52 JD |
994 | } |
995 | } | |
9ce5646a MD |
996 | health_code_update(); |
997 | ||
0c5b3718 SM |
998 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
999 | if (ret_send_status < 0) { | |
6dc3064a DG |
1000 | /* Somehow, the session daemon is not responding anymore. */ |
1001 | goto end_nosignal; | |
1002 | } | |
1003 | break; | |
1004 | } | |
07b86b52 JD |
1005 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
1006 | { | |
1007 | uint64_t key = msg.u.destroy_channel.key; | |
1008 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 1009 | int ret_send_status; |
07b86b52 JD |
1010 | |
1011 | channel = consumer_find_channel(key); | |
1012 | if (!channel) { | |
1013 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 1014 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
1015 | } |
1016 | ||
9ce5646a MD |
1017 | health_code_update(); |
1018 | ||
0c5b3718 SM |
1019 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1020 | if (ret_send_status < 0) { | |
07b86b52 | 1021 | /* Somehow, the session daemon is not responding anymore. */ |
a9d36096 | 1022 | goto end_destroy_channel; |
07b86b52 JD |
1023 | } |
1024 | ||
9ce5646a MD |
1025 | health_code_update(); |
1026 | ||
15dc512a DG |
1027 | /* Stop right now if no channel was found. */ |
1028 | if (!channel) { | |
a9d36096 | 1029 | goto end_destroy_channel; |
15dc512a DG |
1030 | } |
1031 | ||
07b86b52 JD |
1032 | /* |
1033 | * This command should ONLY be issued for channel with streams set in | |
1034 | * no monitor mode. | |
1035 | */ | |
1036 | assert(!channel->monitor); | |
1037 | ||
1038 | /* | |
1039 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1040 | * monitor mode. | |
1041 | */ | |
1042 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
1043 | ||
1044 | consumer_del_channel(channel); | |
a9d36096 | 1045 | end_destroy_channel: |
07b86b52 JD |
1046 | goto end_nosignal; |
1047 | } | |
fb83fe64 JD |
1048 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1049 | { | |
66ab32be JD |
1050 | ssize_t ret; |
1051 | uint64_t count; | |
fb83fe64 JD |
1052 | struct lttng_consumer_channel *channel; |
1053 | uint64_t id = msg.u.discarded_events.session_id; | |
1054 | uint64_t key = msg.u.discarded_events.channel_key; | |
1055 | ||
e5742757 MD |
1056 | DBG("Kernel consumer discarded events command for session id %" |
1057 | PRIu64 ", channel key %" PRIu64, id, key); | |
1058 | ||
fb83fe64 JD |
1059 | channel = consumer_find_channel(key); |
1060 | if (!channel) { | |
1061 | ERR("Kernel consumer discarded events channel %" | |
1062 | PRIu64 " not found", key); | |
66ab32be | 1063 | count = 0; |
e5742757 | 1064 | } else { |
66ab32be | 1065 | count = channel->discarded_events; |
fb83fe64 JD |
1066 | } |
1067 | ||
fb83fe64 JD |
1068 | health_code_update(); |
1069 | ||
1070 | /* Send back returned value to session daemon */ | |
66ab32be | 1071 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1072 | if (ret < 0) { |
1073 | PERROR("send discarded events"); | |
1074 | goto error_fatal; | |
1075 | } | |
1076 | ||
1077 | break; | |
1078 | } | |
1079 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1080 | { | |
66ab32be JD |
1081 | ssize_t ret; |
1082 | uint64_t count; | |
fb83fe64 JD |
1083 | struct lttng_consumer_channel *channel; |
1084 | uint64_t id = msg.u.lost_packets.session_id; | |
1085 | uint64_t key = msg.u.lost_packets.channel_key; | |
1086 | ||
e5742757 MD |
1087 | DBG("Kernel consumer lost packets command for session id %" |
1088 | PRIu64 ", channel key %" PRIu64, id, key); | |
1089 | ||
fb83fe64 JD |
1090 | channel = consumer_find_channel(key); |
1091 | if (!channel) { | |
1092 | ERR("Kernel consumer lost packets channel %" | |
1093 | PRIu64 " not found", key); | |
66ab32be | 1094 | count = 0; |
e5742757 | 1095 | } else { |
66ab32be | 1096 | count = channel->lost_packets; |
fb83fe64 JD |
1097 | } |
1098 | ||
fb83fe64 JD |
1099 | health_code_update(); |
1100 | ||
1101 | /* Send back returned value to session daemon */ | |
66ab32be | 1102 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1103 | if (ret < 0) { |
1104 | PERROR("send lost packets"); | |
1105 | goto error_fatal; | |
1106 | } | |
1107 | ||
1108 | break; | |
1109 | } | |
b3530820 JG |
1110 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1111 | { | |
1112 | int channel_monitor_pipe; | |
0c5b3718 SM |
1113 | int ret_send_status, ret_set_channel_monitor_pipe; |
1114 | ssize_t ret_recv; | |
b3530820 JG |
1115 | |
1116 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1117 | /* Successfully received the command's type. */ | |
0c5b3718 SM |
1118 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1119 | if (ret_send_status < 0) { | |
b3530820 JG |
1120 | goto error_fatal; |
1121 | } | |
1122 | ||
0c5b3718 SM |
1123 | ret_recv = lttcomm_recv_fds_unix_sock( |
1124 | sock, &channel_monitor_pipe, 1); | |
1125 | if (ret_recv != sizeof(channel_monitor_pipe)) { | |
b3530820 JG |
1126 | ERR("Failed to receive channel monitor pipe"); |
1127 | goto error_fatal; | |
1128 | } | |
1129 | ||
1130 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
0c5b3718 SM |
1131 | ret_set_channel_monitor_pipe = |
1132 | consumer_timer_thread_set_channel_monitor_pipe( | |
1133 | channel_monitor_pipe); | |
1134 | if (!ret_set_channel_monitor_pipe) { | |
b3530820 | 1135 | int flags; |
0c5b3718 | 1136 | int ret_fcntl; |
b3530820 JG |
1137 | |
1138 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1139 | /* Set the pipe as non-blocking. */ | |
0c5b3718 SM |
1140 | ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); |
1141 | if (ret_fcntl == -1) { | |
b3530820 JG |
1142 | PERROR("fcntl get flags of the channel monitoring pipe"); |
1143 | goto error_fatal; | |
1144 | } | |
0c5b3718 | 1145 | flags = ret_fcntl; |
b3530820 | 1146 | |
0c5b3718 | 1147 | ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, |
b3530820 | 1148 | flags | O_NONBLOCK); |
0c5b3718 | 1149 | if (ret_fcntl == -1) { |
b3530820 JG |
1150 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); |
1151 | goto error_fatal; | |
1152 | } | |
1153 | DBG("Channel monitor pipe set as non-blocking"); | |
1154 | } else { | |
1155 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1156 | } | |
0c5b3718 SM |
1157 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1158 | if (ret_send_status < 0) { | |
b3530820 JG |
1159 | goto error_fatal; |
1160 | } | |
1161 | break; | |
1162 | } | |
b99a8d42 JD |
1163 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1164 | { | |
92b7a7f8 MD |
1165 | struct lttng_consumer_channel *channel; |
1166 | uint64_t key = msg.u.rotate_channel.key; | |
0c5b3718 | 1167 | int ret_send_status; |
b99a8d42 | 1168 | |
92b7a7f8 | 1169 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1170 | |
92b7a7f8 MD |
1171 | channel = consumer_find_channel(key); |
1172 | if (!channel) { | |
1173 | ERR("Channel %" PRIu64 " not found", key); | |
1174 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1175 | } else { | |
1176 | /* | |
1177 | * Sample the rotate position of all the streams in this channel. | |
1178 | */ | |
0c5b3718 SM |
1179 | int ret_rotate_channel; |
1180 | ||
1181 | ret_rotate_channel = lttng_consumer_rotate_channel( | |
1182 | channel, key, | |
92b7a7f8 | 1183 | msg.u.rotate_channel.relayd_id, |
0c5b3718 SM |
1184 | msg.u.rotate_channel.metadata, ctx); |
1185 | if (ret_rotate_channel < 0) { | |
92b7a7f8 MD |
1186 | ERR("Rotate channel failed"); |
1187 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1188 | } | |
b99a8d42 | 1189 | |
92b7a7f8 MD |
1190 | health_code_update(); |
1191 | } | |
0c5b3718 SM |
1192 | |
1193 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1194 | if (ret_send_status < 0) { | |
b99a8d42 | 1195 | /* Somehow, the session daemon is not responding anymore. */ |
713bdd26 | 1196 | goto error_rotate_channel; |
b99a8d42 | 1197 | } |
92b7a7f8 MD |
1198 | if (channel) { |
1199 | /* Rotate the streams that are ready right now. */ | |
0c5b3718 SM |
1200 | int ret_rotate; |
1201 | ||
1202 | ret_rotate = lttng_consumer_rotate_ready_streams( | |
92b7a7f8 | 1203 | channel, key, ctx); |
0c5b3718 | 1204 | if (ret_rotate < 0) { |
92b7a7f8 MD |
1205 | ERR("Rotate ready streams failed"); |
1206 | } | |
b99a8d42 | 1207 | } |
b99a8d42 | 1208 | break; |
713bdd26 JG |
1209 | error_rotate_channel: |
1210 | goto end_nosignal; | |
b99a8d42 | 1211 | } |
5f3aff8b MD |
1212 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
1213 | { | |
1214 | struct lttng_consumer_channel *channel; | |
1215 | uint64_t key = msg.u.clear_channel.key; | |
0c5b3718 | 1216 | int ret_send_status; |
5f3aff8b MD |
1217 | |
1218 | channel = consumer_find_channel(key); | |
1219 | if (!channel) { | |
1220 | DBG("Channel %" PRIu64 " not found", key); | |
1221 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1222 | } else { | |
0c5b3718 SM |
1223 | int ret_clear_channel; |
1224 | ||
1225 | ret_clear_channel = | |
1226 | lttng_consumer_clear_channel(channel); | |
1227 | if (ret_clear_channel) { | |
5f3aff8b | 1228 | ERR("Clear channel failed"); |
0c5b3718 | 1229 | ret_code = ret_clear_channel; |
5f3aff8b MD |
1230 | } |
1231 | ||
1232 | health_code_update(); | |
1233 | } | |
0c5b3718 SM |
1234 | |
1235 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1236 | if (ret_send_status < 0) { | |
5f3aff8b MD |
1237 | /* Somehow, the session daemon is not responding anymore. */ |
1238 | goto end_nosignal; | |
1239 | } | |
1240 | ||
1241 | break; | |
1242 | } | |
d2956687 | 1243 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1244 | { |
0c5b3718 SM |
1245 | int ret_send_status; |
1246 | ||
d2956687 JG |
1247 | ret_code = lttng_consumer_init_command(ctx, |
1248 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1249 | health_code_update(); |
0c5b3718 SM |
1250 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1251 | if (ret_send_status < 0) { | |
00fb02ac JD |
1252 | /* Somehow, the session daemon is not responding anymore. */ |
1253 | goto end_nosignal; | |
1254 | } | |
1255 | break; | |
1256 | } | |
d2956687 | 1257 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1258 | { |
d2956687 | 1259 | const struct lttng_credentials credentials = { |
ff588497 JR |
1260 | .uid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.uid), |
1261 | .gid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.gid), | |
d2956687 JG |
1262 | }; |
1263 | const bool is_local_trace = | |
1264 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1265 | const uint64_t relayd_id = | |
1266 | msg.u.create_trace_chunk.relayd_id.value; | |
1267 | const char *chunk_override_name = | |
1268 | *msg.u.create_trace_chunk.override_name ? | |
1269 | msg.u.create_trace_chunk.override_name : | |
1270 | NULL; | |
cbf53d23 | 1271 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
d88744a4 | 1272 | |
d2956687 JG |
1273 | /* |
1274 | * The session daemon will only provide a chunk directory file | |
1275 | * descriptor for local traces. | |
1276 | */ | |
1277 | if (is_local_trace) { | |
1278 | int chunk_dirfd; | |
0c5b3718 SM |
1279 | int ret_send_status; |
1280 | ssize_t ret_recv; | |
19990ed5 | 1281 | |
d2956687 | 1282 | /* Acnowledge the reception of the command. */ |
0c5b3718 SM |
1283 | ret_send_status = consumer_send_status_msg( |
1284 | sock, LTTCOMM_CONSUMERD_SUCCESS); | |
1285 | if (ret_send_status < 0) { | |
d2956687 JG |
1286 | /* Somehow, the session daemon is not responding anymore. */ |
1287 | goto end_nosignal; | |
1288 | } | |
92816cc3 | 1289 | |
0c5b3718 SM |
1290 | ret_recv = lttcomm_recv_fds_unix_sock( |
1291 | sock, &chunk_dirfd, 1); | |
1292 | if (ret_recv != sizeof(chunk_dirfd)) { | |
d2956687 JG |
1293 | ERR("Failed to receive trace chunk directory file descriptor"); |
1294 | goto error_fatal; | |
1295 | } | |
92816cc3 | 1296 | |
d2956687 JG |
1297 | DBG("Received trace chunk directory fd (%d)", |
1298 | chunk_dirfd); | |
cbf53d23 | 1299 | chunk_directory_handle = lttng_directory_handle_create_from_dirfd( |
d2956687 | 1300 | chunk_dirfd); |
cbf53d23 | 1301 | if (!chunk_directory_handle) { |
d2956687 JG |
1302 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); |
1303 | if (close(chunk_dirfd)) { | |
1304 | PERROR("Failed to close chunk directory file descriptor"); | |
1305 | } | |
1306 | goto error_fatal; | |
1307 | } | |
92816cc3 JG |
1308 | } |
1309 | ||
d2956687 JG |
1310 | ret_code = lttng_consumer_create_trace_chunk( |
1311 | !is_local_trace ? &relayd_id : NULL, | |
1312 | msg.u.create_trace_chunk.session_id, | |
1313 | msg.u.create_trace_chunk.chunk_id, | |
e5add6d0 JG |
1314 | (time_t) msg.u.create_trace_chunk |
1315 | .creation_timestamp, | |
d2956687 | 1316 | chunk_override_name, |
e5add6d0 JG |
1317 | msg.u.create_trace_chunk.credentials.is_set ? |
1318 | &credentials : | |
1319 | NULL, | |
cbf53d23 JG |
1320 | chunk_directory_handle); |
1321 | lttng_directory_handle_put(chunk_directory_handle); | |
d2956687 | 1322 | goto end_msg_sessiond; |
d88744a4 | 1323 | } |
d2956687 | 1324 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1325 | { |
bbc4768c JG |
1326 | enum lttng_trace_chunk_command_type close_command = |
1327 | msg.u.close_trace_chunk.close_command.value; | |
d2956687 JG |
1328 | const uint64_t relayd_id = |
1329 | msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f MD |
1330 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1331 | char path[LTTNG_PATH_MAX]; | |
0c5b3718 | 1332 | ssize_t ret_send; |
d2956687 JG |
1333 | |
1334 | ret_code = lttng_consumer_close_trace_chunk( | |
1335 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
bbc4768c JG |
1336 | &relayd_id : |
1337 | NULL, | |
d2956687 JG |
1338 | msg.u.close_trace_chunk.session_id, |
1339 | msg.u.close_trace_chunk.chunk_id, | |
bbc4768c JG |
1340 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1341 | msg.u.close_trace_chunk.close_command.is_set ? | |
1342 | &close_command : | |
ecd1a12f MD |
1343 | NULL, path); |
1344 | reply.ret_code = ret_code; | |
1345 | reply.path_length = strlen(path) + 1; | |
0c5b3718 SM |
1346 | ret_send = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
1347 | if (ret_send != sizeof(reply)) { | |
ecd1a12f MD |
1348 | goto error_fatal; |
1349 | } | |
0c5b3718 SM |
1350 | ret_send = lttcomm_send_unix_sock( |
1351 | sock, path, reply.path_length); | |
1352 | if (ret_send != reply.path_length) { | |
ecd1a12f MD |
1353 | goto error_fatal; |
1354 | } | |
1355 | goto end_nosignal; | |
3654ed19 | 1356 | } |
d2956687 | 1357 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 1358 | { |
d2956687 JG |
1359 | const uint64_t relayd_id = |
1360 | msg.u.trace_chunk_exists.relayd_id.value; | |
1361 | ||
1362 | ret_code = lttng_consumer_trace_chunk_exists( | |
1363 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1364 | &relayd_id : NULL, | |
1365 | msg.u.trace_chunk_exists.session_id, | |
1366 | msg.u.trace_chunk_exists.chunk_id); | |
1367 | goto end_msg_sessiond; | |
a1ae2ea5 | 1368 | } |
04ed9e10 JG |
1369 | case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: |
1370 | { | |
1371 | const uint64_t key = msg.u.open_channel_packets.key; | |
1372 | struct lttng_consumer_channel *channel = | |
1373 | consumer_find_channel(key); | |
1374 | ||
1375 | if (channel) { | |
1376 | pthread_mutex_lock(&channel->lock); | |
1377 | ret_code = lttng_consumer_open_channel_packets(channel); | |
1378 | pthread_mutex_unlock(&channel->lock); | |
1379 | } else { | |
1380 | WARN("Channel %" PRIu64 " not found", key); | |
1381 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1382 | } | |
1383 | ||
1384 | health_code_update(); | |
1385 | goto end_msg_sessiond; | |
1386 | } | |
3bd1e081 | 1387 | default: |
3f8e211f | 1388 | goto end_nosignal; |
3bd1e081 | 1389 | } |
3f8e211f | 1390 | |
3bd1e081 | 1391 | end_nosignal: |
4cbc1a04 DG |
1392 | /* |
1393 | * Return 1 to indicate success since the 0 value can be a socket | |
1394 | * shutdown during the recv() or send() call. | |
1395 | */ | |
0c5b3718 | 1396 | ret_func = 1; |
c5c7998f JG |
1397 | goto end; |
1398 | error_fatal: | |
1399 | /* This will issue a consumer stop. */ | |
0c5b3718 | 1400 | ret_func = -1; |
c5c7998f | 1401 | goto end; |
d2956687 JG |
1402 | end_msg_sessiond: |
1403 | /* | |
1404 | * The returned value here is not useful since either way we'll return 1 to | |
1405 | * the caller because the session daemon socket management is done | |
1406 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1407 | */ | |
0c5b3718 SM |
1408 | { |
1409 | int ret_send_status; | |
1410 | ||
1411 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1412 | if (ret_send_status < 0) { | |
1413 | goto error_fatal; | |
1414 | } | |
d2956687 | 1415 | } |
0c5b3718 SM |
1416 | |
1417 | ret_func = 1; | |
1418 | ||
c5c7998f | 1419 | end: |
d2956687 | 1420 | health_code_update(); |
1803a064 | 1421 | rcu_read_unlock(); |
0c5b3718 | 1422 | return ret_func; |
3bd1e081 | 1423 | } |
d41f73b7 | 1424 | |
94d49140 JD |
1425 | /* |
1426 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1427 | * metadata thread can consumer them. | |
1428 | * | |
1429 | * Metadata stream lock MUST be acquired. | |
94d49140 | 1430 | */ |
577eea73 JG |
1431 | enum sync_metadata_status lttng_kconsumer_sync_metadata( |
1432 | struct lttng_consumer_stream *metadata) | |
94d49140 JD |
1433 | { |
1434 | int ret; | |
577eea73 | 1435 | enum sync_metadata_status status; |
94d49140 JD |
1436 | |
1437 | assert(metadata); | |
1438 | ||
1439 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1440 | if (ret < 0) { | |
1441 | ERR("Failed to flush kernel stream"); | |
577eea73 | 1442 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
1443 | goto end; |
1444 | } | |
1445 | ||
1446 | ret = kernctl_snapshot(metadata->wait_fd); | |
1447 | if (ret < 0) { | |
577eea73 JG |
1448 | if (errno == EAGAIN) { |
1449 | /* No new metadata, exit. */ | |
1450 | DBG("Sync metadata, no new kernel metadata"); | |
1451 | status = SYNC_METADATA_STATUS_NO_DATA; | |
1452 | } else { | |
94d49140 | 1453 | ERR("Sync metadata, taking kernel snapshot failed."); |
577eea73 | 1454 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 | 1455 | } |
577eea73 JG |
1456 | } else { |
1457 | status = SYNC_METADATA_STATUS_NEW_DATA; | |
94d49140 JD |
1458 | } |
1459 | ||
1460 | end: | |
577eea73 | 1461 | return status; |
94d49140 | 1462 | } |
309167d2 | 1463 | |
fb83fe64 | 1464 | static |
6f9449c2 JG |
1465 | int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1466 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1467 | { |
1468 | int ret; | |
fb83fe64 | 1469 | |
6f9449c2 JG |
1470 | ret = kernctl_get_subbuf_size( |
1471 | stream->wait_fd, &subbuf->info.data.subbuf_size); | |
1472 | if (ret) { | |
fb83fe64 JD |
1473 | goto end; |
1474 | } | |
fb83fe64 | 1475 | |
6f9449c2 JG |
1476 | ret = kernctl_get_padded_subbuf_size( |
1477 | stream->wait_fd, &subbuf->info.data.padded_subbuf_size); | |
1478 | if (ret) { | |
fb83fe64 JD |
1479 | goto end; |
1480 | } | |
fb83fe64 JD |
1481 | |
1482 | end: | |
1483 | return ret; | |
1484 | } | |
1485 | ||
93ec662e | 1486 | static |
6f9449c2 JG |
1487 | int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1488 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1489 | { |
1490 | int ret; | |
93ec662e | 1491 | |
6f9449c2 JG |
1492 | ret = extract_common_subbuffer_info(stream, subbuf); |
1493 | if (ret) { | |
93ec662e JD |
1494 | goto end; |
1495 | } | |
1496 | ||
6f9449c2 JG |
1497 | ret = kernctl_get_metadata_version( |
1498 | stream->wait_fd, &subbuf->info.metadata.version); | |
1499 | if (ret) { | |
93ec662e JD |
1500 | goto end; |
1501 | } | |
1502 | ||
93ec662e JD |
1503 | end: |
1504 | return ret; | |
1505 | } | |
1506 | ||
6f9449c2 JG |
1507 | static |
1508 | int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, | |
1509 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1510 | { |
6f9449c2 | 1511 | int ret; |
d41f73b7 | 1512 | |
6f9449c2 JG |
1513 | ret = extract_common_subbuffer_info(stream, subbuf); |
1514 | if (ret) { | |
1515 | goto end; | |
1516 | } | |
309167d2 | 1517 | |
6f9449c2 JG |
1518 | ret = kernctl_get_packet_size( |
1519 | stream->wait_fd, &subbuf->info.data.packet_size); | |
1520 | if (ret < 0) { | |
1521 | PERROR("Failed to get sub-buffer packet size"); | |
1522 | goto end; | |
1523 | } | |
02d02e31 | 1524 | |
6f9449c2 JG |
1525 | ret = kernctl_get_content_size( |
1526 | stream->wait_fd, &subbuf->info.data.content_size); | |
1527 | if (ret < 0) { | |
1528 | PERROR("Failed to get sub-buffer content size"); | |
1529 | goto end; | |
d41f73b7 MD |
1530 | } |
1531 | ||
6f9449c2 JG |
1532 | ret = kernctl_get_timestamp_begin( |
1533 | stream->wait_fd, &subbuf->info.data.timestamp_begin); | |
1534 | if (ret < 0) { | |
1535 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1536 | goto end; | |
1d4dfdef DG |
1537 | } |
1538 | ||
6f9449c2 JG |
1539 | ret = kernctl_get_timestamp_end( |
1540 | stream->wait_fd, &subbuf->info.data.timestamp_end); | |
1541 | if (ret < 0) { | |
1542 | PERROR("Failed to get sub-buffer end timestamp"); | |
1543 | goto end; | |
1544 | } | |
1545 | ||
1546 | ret = kernctl_get_events_discarded( | |
1547 | stream->wait_fd, &subbuf->info.data.events_discarded); | |
1548 | if (ret) { | |
1549 | PERROR("Failed to get sub-buffer events discarded count"); | |
1550 | goto end; | |
1551 | } | |
1552 | ||
1553 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
1554 | &subbuf->info.data.sequence_number.value); | |
1555 | if (ret) { | |
1556 | /* May not be supported by older LTTng-modules. */ | |
1557 | if (ret != -ENOTTY) { | |
1558 | PERROR("Failed to get sub-buffer sequence number"); | |
1559 | goto end; | |
fb83fe64 | 1560 | } |
1c20f0e2 | 1561 | } else { |
6f9449c2 | 1562 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1563 | } |
1564 | ||
6f9449c2 JG |
1565 | ret = kernctl_get_stream_id( |
1566 | stream->wait_fd, &subbuf->info.data.stream_id); | |
1567 | if (ret < 0) { | |
1568 | PERROR("Failed to get stream id"); | |
1569 | goto end; | |
1570 | } | |
1d4dfdef | 1571 | |
6f9449c2 JG |
1572 | ret = kernctl_get_instance_id(stream->wait_fd, |
1573 | &subbuf->info.data.stream_instance_id.value); | |
1574 | if (ret) { | |
1575 | /* May not be supported by older LTTng-modules. */ | |
1576 | if (ret != -ENOTTY) { | |
1577 | PERROR("Failed to get stream instance id"); | |
1578 | goto end; | |
1d4dfdef | 1579 | } |
6f9449c2 JG |
1580 | } else { |
1581 | subbuf->info.data.stream_instance_id.is_set = true; | |
1582 | } | |
1583 | end: | |
1584 | return ret; | |
1585 | } | |
47e81c02 | 1586 | |
6f9449c2 | 1587 | static |
823a3926 JG |
1588 | enum get_next_subbuffer_status get_subbuffer_common( |
1589 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1590 | struct stream_subbuffer *subbuffer) |
1591 | { | |
1592 | int ret; | |
823a3926 | 1593 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1594 | |
1595 | ret = kernctl_get_next_subbuf(stream->wait_fd); | |
823a3926 JG |
1596 | switch (ret) { |
1597 | case 0: | |
1598 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1599 | break; | |
1600 | case -ENODATA: | |
1601 | case -EAGAIN: | |
684c6783 MD |
1602 | /* |
1603 | * The caller only expects -ENODATA when there is no data to | |
1604 | * read, but the kernel tracer returns -EAGAIN when there is | |
1605 | * currently no data for a non-finalized stream, and -ENODATA | |
1606 | * when there is no data for a finalized stream. Those can be | |
1607 | * combined into a -ENODATA return value. | |
1608 | */ | |
823a3926 JG |
1609 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; |
1610 | goto end; | |
1611 | default: | |
1612 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
6f9449c2 JG |
1613 | goto end; |
1614 | } | |
1615 | ||
1616 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
823a3926 JG |
1617 | stream, subbuffer); |
1618 | if (ret) { | |
1619 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1620 | } | |
6f9449c2 | 1621 | end: |
823a3926 | 1622 | return status; |
6f9449c2 | 1623 | } |
128708c3 | 1624 | |
6f9449c2 | 1625 | static |
823a3926 JG |
1626 | enum get_next_subbuffer_status get_next_subbuffer_splice( |
1627 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1628 | struct stream_subbuffer *subbuffer) |
1629 | { | |
823a3926 JG |
1630 | const enum get_next_subbuffer_status status = |
1631 | get_subbuffer_common(stream, subbuffer); | |
1d4dfdef | 1632 | |
823a3926 | 1633 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { |
6f9449c2 JG |
1634 | goto end; |
1635 | } | |
1d4dfdef | 1636 | |
6f9449c2 JG |
1637 | subbuffer->buffer.fd = stream->wait_fd; |
1638 | end: | |
823a3926 | 1639 | return status; |
6f9449c2 | 1640 | } |
fd424d99 | 1641 | |
6f9449c2 | 1642 | static |
823a3926 JG |
1643 | enum get_next_subbuffer_status get_next_subbuffer_mmap( |
1644 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1645 | struct stream_subbuffer *subbuffer) |
1646 | { | |
1647 | int ret; | |
823a3926 | 1648 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1649 | const char *addr; |
1650 | ||
823a3926 JG |
1651 | status = get_subbuffer_common(stream, subbuffer); |
1652 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { | |
6f9449c2 | 1653 | goto end; |
128708c3 | 1654 | } |
6f9449c2 JG |
1655 | |
1656 | ret = get_current_subbuf_addr(stream, &addr); | |
1657 | if (ret) { | |
823a3926 | 1658 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
6f9449c2 | 1659 | goto end; |
d41f73b7 | 1660 | } |
6f9449c2 JG |
1661 | |
1662 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1663 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1664 | end: | |
823a3926 | 1665 | return status; |
6f9449c2 JG |
1666 | } |
1667 | ||
f5ba75b4 | 1668 | static |
823a3926 | 1669 | enum get_next_subbuffer_status get_next_subbuffer_metadata_check(struct lttng_consumer_stream *stream, |
f5ba75b4 JG |
1670 | struct stream_subbuffer *subbuffer) |
1671 | { | |
1672 | int ret; | |
1673 | const char *addr; | |
1674 | bool coherent; | |
823a3926 | 1675 | enum get_next_subbuffer_status status; |
f5ba75b4 JG |
1676 | |
1677 | ret = kernctl_get_next_subbuf_metadata_check(stream->wait_fd, | |
1678 | &coherent); | |
1679 | if (ret) { | |
1680 | goto end; | |
1681 | } | |
1682 | ||
1683 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1684 | stream, subbuffer); | |
1685 | if (ret) { | |
1686 | goto end; | |
1687 | } | |
1688 | ||
1689 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
1690 | ||
1691 | ret = get_current_subbuf_addr(stream, &addr); | |
1692 | if (ret) { | |
1693 | goto end; | |
1694 | } | |
1695 | ||
1696 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1697 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1698 | DBG("Got metadata packet with padded_subbuf_size = %lu, coherent = %s", | |
1699 | subbuffer->info.metadata.padded_subbuf_size, | |
1700 | coherent ? "true" : "false"); | |
1701 | end: | |
684c6783 MD |
1702 | /* |
1703 | * The caller only expects -ENODATA when there is no data to read, but | |
1704 | * the kernel tracer returns -EAGAIN when there is currently no data | |
1705 | * for a non-finalized stream, and -ENODATA when there is no data for a | |
1706 | * finalized stream. Those can be combined into a -ENODATA return value. | |
1707 | */ | |
823a3926 JG |
1708 | switch (ret) { |
1709 | case 0: | |
1710 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1711 | break; | |
1712 | case -ENODATA: | |
1713 | case -EAGAIN: | |
1714 | /* | |
1715 | * The caller only expects -ENODATA when there is no data to | |
1716 | * read, but the kernel tracer returns -EAGAIN when there is | |
1717 | * currently no data for a non-finalized stream, and -ENODATA | |
1718 | * when there is no data for a finalized stream. Those can be | |
1719 | * combined into a -ENODATA return value. | |
1720 | */ | |
1721 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; | |
1722 | break; | |
1723 | default: | |
1724 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1725 | break; | |
684c6783 MD |
1726 | } |
1727 | ||
823a3926 | 1728 | return status; |
f5ba75b4 JG |
1729 | } |
1730 | ||
6f9449c2 JG |
1731 | static |
1732 | int put_next_subbuffer(struct lttng_consumer_stream *stream, | |
1733 | struct stream_subbuffer *subbuffer) | |
1734 | { | |
1735 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1736 | ||
1737 | if (ret) { | |
1738 | if (ret == -EFAULT) { | |
1739 | PERROR("Error in unreserving sub buffer"); | |
1740 | } else if (ret == -EIO) { | |
d41f73b7 | 1741 | /* Should never happen with newer LTTng versions */ |
6f9449c2 | 1742 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); |
d41f73b7 | 1743 | } |
d41f73b7 MD |
1744 | } |
1745 | ||
6f9449c2 JG |
1746 | return ret; |
1747 | } | |
1c20f0e2 | 1748 | |
f5ba75b4 JG |
1749 | static |
1750 | bool is_get_next_check_metadata_available(int tracer_fd) | |
1751 | { | |
0aeedd20 JG |
1752 | const int ret = kernctl_get_next_subbuf_metadata_check(tracer_fd, NULL); |
1753 | const bool available = ret != -ENOTTY; | |
1754 | ||
1755 | if (ret == 0) { | |
1756 | /* get succeeded, make sure to put the subbuffer. */ | |
1757 | kernctl_put_subbuf(tracer_fd); | |
1758 | } | |
1759 | ||
1760 | return available; | |
f5ba75b4 JG |
1761 | } |
1762 | ||
ee0350f8 MD |
1763 | static |
1764 | int signal_metadata(struct lttng_consumer_stream *stream, | |
1765 | struct lttng_consumer_local_data *ctx) | |
1766 | { | |
1767 | ASSERT_LOCKED(stream->metadata_rdv_lock); | |
1768 | return pthread_cond_broadcast(&stream->metadata_rdv) ? -errno : 0; | |
1769 | } | |
1770 | ||
f5ba75b4 JG |
1771 | static |
1772 | int lttng_kconsumer_set_stream_ops( | |
6f9449c2 JG |
1773 | struct lttng_consumer_stream *stream) |
1774 | { | |
f5ba75b4 JG |
1775 | int ret = 0; |
1776 | ||
1777 | if (stream->metadata_flag && stream->chan->is_live) { | |
1778 | DBG("Attempting to enable metadata bucketization for live consumers"); | |
1779 | if (is_get_next_check_metadata_available(stream->wait_fd)) { | |
1780 | DBG("Kernel tracer supports get_next_subbuffer_metadata_check, metadata will be accumulated until a coherent state is reached"); | |
1781 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1782 | get_next_subbuffer_metadata_check; | |
1783 | ret = consumer_stream_enable_metadata_bucketization( | |
1784 | stream); | |
1785 | if (ret) { | |
1786 | goto end; | |
1787 | } | |
1788 | } else { | |
1789 | /* | |
1790 | * The kernel tracer version is too old to indicate | |
1791 | * when the metadata stream has reached a "coherent" | |
1792 | * (parseable) point. | |
1793 | * | |
1794 | * This means that a live viewer may see an incoherent | |
1795 | * sequence of metadata and fail to parse it. | |
1796 | */ | |
1797 | WARN("Kernel tracer does not support get_next_subbuffer_metadata_check which may cause live clients to fail to parse the metadata stream"); | |
1798 | metadata_bucket_destroy(stream->metadata_bucket); | |
1799 | stream->metadata_bucket = NULL; | |
1800 | } | |
ee0350f8 MD |
1801 | |
1802 | stream->read_subbuffer_ops.on_sleep = signal_metadata; | |
f5ba75b4 JG |
1803 | } |
1804 | ||
1805 | if (!stream->read_subbuffer_ops.get_next_subbuffer) { | |
1806 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
1807 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1808 | get_next_subbuffer_mmap; | |
1809 | } else { | |
1810 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1811 | get_next_subbuffer_splice; | |
1812 | } | |
94d49140 JD |
1813 | } |
1814 | ||
6f9449c2 JG |
1815 | if (stream->metadata_flag) { |
1816 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1817 | extract_metadata_subbuffer_info; | |
1818 | } else { | |
1819 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1820 | extract_data_subbuffer_info; | |
1821 | if (stream->chan->is_live) { | |
1822 | stream->read_subbuffer_ops.send_live_beacon = | |
1823 | consumer_flush_kernel_index; | |
1824 | } | |
309167d2 JD |
1825 | } |
1826 | ||
6f9449c2 | 1827 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; |
f5ba75b4 JG |
1828 | end: |
1829 | return ret; | |
d41f73b7 MD |
1830 | } |
1831 | ||
1832 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1833 | { | |
1834 | int ret; | |
ffe60014 DG |
1835 | |
1836 | assert(stream); | |
1837 | ||
2bba9e53 | 1838 | /* |
d2956687 JG |
1839 | * Don't create anything if this is set for streaming or if there is |
1840 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1841 | */ |
d2956687 JG |
1842 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1843 | stream->chan->trace_chunk) { | |
1844 | ret = consumer_stream_create_output_files(stream, true); | |
1845 | if (ret) { | |
fe4477ee JD |
1846 | goto error; |
1847 | } | |
ffe60014 | 1848 | } |
d41f73b7 | 1849 | |
d41f73b7 MD |
1850 | if (stream->output == LTTNG_EVENT_MMAP) { |
1851 | /* get the len of the mmap region */ | |
1852 | unsigned long mmap_len; | |
1853 | ||
1854 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1855 | if (ret != 0) { | |
ffe60014 | 1856 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1857 | goto error_close_fd; |
1858 | } | |
1859 | stream->mmap_len = (size_t) mmap_len; | |
1860 | ||
ffe60014 DG |
1861 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1862 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1863 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1864 | PERROR("Error mmaping"); |
d41f73b7 MD |
1865 | ret = -1; |
1866 | goto error_close_fd; | |
1867 | } | |
1868 | } | |
1869 | ||
f5ba75b4 JG |
1870 | ret = lttng_kconsumer_set_stream_ops(stream); |
1871 | if (ret) { | |
1872 | goto error_close_fd; | |
1873 | } | |
6f9449c2 | 1874 | |
d41f73b7 MD |
1875 | /* we return 0 to let the library handle the FD internally */ |
1876 | return 0; | |
1877 | ||
1878 | error_close_fd: | |
2f225ce2 | 1879 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1880 | int err; |
1881 | ||
1882 | err = close(stream->out_fd); | |
1883 | assert(!err); | |
2f225ce2 | 1884 | stream->out_fd = -1; |
d41f73b7 MD |
1885 | } |
1886 | error: | |
1887 | return ret; | |
1888 | } | |
1889 | ||
ca22feea DG |
1890 | /* |
1891 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1892 | * stream. Consumer data lock MUST be acquired before calling this function |
1893 | * and the stream lock. | |
ca22feea | 1894 | * |
6d805429 | 1895 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1896 | * data is available for trace viewer reading. |
1897 | */ | |
6d805429 | 1898 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1899 | { |
1900 | int ret; | |
1901 | ||
1902 | assert(stream); | |
1903 | ||
873b9e9a MD |
1904 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1905 | ret = 0; | |
1906 | goto end; | |
1907 | } | |
1908 | ||
ca22feea DG |
1909 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1910 | if (ret == 0) { | |
1911 | /* There is still data so let's put back this subbuffer. */ | |
1912 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1913 | assert(ret == 0); | |
6d805429 | 1914 | ret = 1; /* Data is pending */ |
4e9a4686 | 1915 | goto end; |
ca22feea DG |
1916 | } |
1917 | ||
6d805429 DG |
1918 | /* Data is NOT pending and ready to be read. */ |
1919 | ret = 0; | |
ca22feea | 1920 | |
6efae65e DG |
1921 | end: |
1922 | return ret; | |
ca22feea | 1923 | } |