Commit | Line | Data |
---|---|---|
3bd1e081 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca> |
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 |
d2956687 | 142 | * channel. The channel lock must be held by the caller. |
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 JD |
156 | |
157 | rcu_read_lock(); | |
158 | ||
07b86b52 JD |
159 | /* Splice is not supported yet for channel snapshot. */ |
160 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
9381314c JG |
161 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
162 | channel->name); | |
07b86b52 JD |
163 | ret = -1; |
164 | goto end; | |
165 | } | |
166 | ||
10a50311 | 167 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 168 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
169 | |
170 | health_code_update(); | |
171 | ||
07b86b52 JD |
172 | /* |
173 | * Lock stream because we are about to change its state. | |
174 | */ | |
175 | pthread_mutex_lock(&stream->lock); | |
176 | ||
d2956687 JG |
177 | assert(channel->trace_chunk); |
178 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { | |
179 | /* | |
180 | * Can't happen barring an internal error as the channel | |
181 | * holds a reference to the trace chunk. | |
182 | */ | |
183 | ERR("Failed to acquire reference to channel's trace chunk"); | |
184 | ret = -1; | |
185 | goto end_unlock; | |
186 | } | |
187 | assert(!stream->trace_chunk); | |
188 | stream->trace_chunk = channel->trace_chunk; | |
189 | ||
29decac3 DG |
190 | /* |
191 | * Assign the received relayd ID so we can use it for streaming. The streams | |
192 | * are not visible to anyone so this is OK to change it. | |
193 | */ | |
07b86b52 JD |
194 | stream->net_seq_idx = relayd_id; |
195 | channel->relayd_id = relayd_id; | |
196 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 197 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
198 | if (ret < 0) { |
199 | ERR("sending stream to relayd"); | |
200 | goto end_unlock; | |
201 | } | |
07b86b52 | 202 | } else { |
d2956687 JG |
203 | ret = consumer_stream_create_output_files(stream, |
204 | false); | |
07b86b52 | 205 | if (ret < 0) { |
07b86b52 JD |
206 | goto end_unlock; |
207 | } | |
d2956687 JG |
208 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
209 | stream->key); | |
07b86b52 JD |
210 | } |
211 | ||
f22dd891 | 212 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 213 | if (ret < 0) { |
f22dd891 MD |
214 | /* |
215 | * Doing a buffer flush which does not take into | |
216 | * account empty packets. This is not perfect | |
217 | * for stream intersection, but required as a | |
218 | * fall-back when "flush_empty" is not | |
219 | * implemented by lttng-modules. | |
220 | */ | |
221 | ret = kernctl_buffer_flush(stream->wait_fd); | |
222 | if (ret < 0) { | |
223 | ERR("Failed to flush kernel stream"); | |
224 | goto end_unlock; | |
225 | } | |
07b86b52 JD |
226 | goto end_unlock; |
227 | } | |
228 | ||
229 | ret = lttng_kconsumer_take_snapshot(stream); | |
230 | if (ret < 0) { | |
231 | ERR("Taking kernel snapshot"); | |
232 | goto end_unlock; | |
233 | } | |
234 | ||
235 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
236 | if (ret < 0) { | |
237 | ERR("Produced kernel snapshot position"); | |
238 | goto end_unlock; | |
239 | } | |
240 | ||
241 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
242 | if (ret < 0) { | |
243 | ERR("Consumerd kernel snapshot position"); | |
244 | goto end_unlock; | |
245 | } | |
246 | ||
d07ceecd MD |
247 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
248 | produced_pos, nb_packets_per_stream, | |
249 | stream->max_sb_size); | |
5c786ded | 250 | |
9377d830 | 251 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
252 | ssize_t read_len; |
253 | unsigned long len, padded_len; | |
128708c3 | 254 | const char *subbuf_addr; |
fd424d99 | 255 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 256 | |
9ce5646a | 257 | health_code_update(); |
07b86b52 JD |
258 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
259 | ||
260 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
261 | if (ret < 0) { | |
32af2c95 | 262 | if (ret != -EAGAIN) { |
07b86b52 JD |
263 | PERROR("kernctl_get_subbuf snapshot"); |
264 | goto end_unlock; | |
265 | } | |
266 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
267 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 268 | stream->chan->lost_packets++; |
07b86b52 JD |
269 | continue; |
270 | } | |
271 | ||
272 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
273 | if (ret < 0) { | |
274 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 275 | goto error_put_subbuf; |
07b86b52 JD |
276 | } |
277 | ||
278 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
279 | if (ret < 0) { | |
280 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 281 | goto error_put_subbuf; |
07b86b52 JD |
282 | } |
283 | ||
128708c3 JG |
284 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
285 | if (ret) { | |
286 | goto error_put_subbuf; | |
287 | } | |
288 | ||
fd424d99 JG |
289 | subbuf_view = lttng_buffer_view_init( |
290 | subbuf_addr, 0, padded_len); | |
f5ba75b4 | 291 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
fd424d99 | 292 | stream, &subbuf_view, |
6f9449c2 | 293 | padded_len - len); |
07b86b52 | 294 | /* |
29decac3 DG |
295 | * We write the padded len in local tracefiles but the data len |
296 | * when using a relay. Display the error but continue processing | |
297 | * to try to release the subbuffer. | |
07b86b52 JD |
298 | */ |
299 | if (relayd_id != (uint64_t) -1ULL) { | |
300 | if (read_len != len) { | |
301 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
302 | read_len, len); | |
303 | } | |
304 | } else { | |
305 | if (read_len != padded_len) { | |
306 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
307 | read_len, padded_len); | |
308 | } | |
309 | } | |
310 | ||
311 | ret = kernctl_put_subbuf(stream->wait_fd); | |
312 | if (ret < 0) { | |
313 | ERR("Snapshot kernctl_put_subbuf"); | |
314 | goto end_unlock; | |
315 | } | |
316 | consumed_pos += stream->max_sb_size; | |
317 | } | |
318 | ||
319 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
320 | if (stream->out_fd >= 0) { |
321 | ret = close(stream->out_fd); | |
322 | if (ret < 0) { | |
323 | PERROR("Kernel consumer snapshot close out_fd"); | |
324 | goto end_unlock; | |
325 | } | |
326 | stream->out_fd = -1; | |
07b86b52 | 327 | } |
07b86b52 JD |
328 | } else { |
329 | close_relayd_stream(stream); | |
330 | stream->net_seq_idx = (uint64_t) -1ULL; | |
331 | } | |
d2956687 JG |
332 | lttng_trace_chunk_put(stream->trace_chunk); |
333 | stream->trace_chunk = NULL; | |
07b86b52 JD |
334 | pthread_mutex_unlock(&stream->lock); |
335 | } | |
336 | ||
337 | /* All good! */ | |
338 | ret = 0; | |
339 | goto end; | |
340 | ||
29decac3 DG |
341 | error_put_subbuf: |
342 | ret = kernctl_put_subbuf(stream->wait_fd); | |
343 | if (ret < 0) { | |
344 | ERR("Snapshot kernctl_put_subbuf error path"); | |
345 | } | |
07b86b52 JD |
346 | end_unlock: |
347 | pthread_mutex_unlock(&stream->lock); | |
348 | end: | |
349 | rcu_read_unlock(); | |
350 | return ret; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Read the whole metadata available for a snapshot. | |
3eb928aa | 355 | * RCU read-side lock must be held across this function to ensure existence of |
d2956687 | 356 | * metadata_channel. The channel lock must be held by the caller. |
07b86b52 JD |
357 | * |
358 | * Returns 0 on success, < 0 on error | |
359 | */ | |
d2956687 JG |
360 | static int lttng_kconsumer_snapshot_metadata( |
361 | struct lttng_consumer_channel *metadata_channel, | |
3eb928aa MD |
362 | uint64_t key, char *path, uint64_t relayd_id, |
363 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 364 | { |
d771f832 DG |
365 | int ret, use_relayd = 0; |
366 | ssize_t ret_read; | |
07b86b52 | 367 | struct lttng_consumer_stream *metadata_stream; |
d771f832 DG |
368 | |
369 | assert(ctx); | |
07b86b52 JD |
370 | |
371 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
372 | key, path); | |
373 | ||
374 | rcu_read_lock(); | |
375 | ||
07b86b52 JD |
376 | metadata_stream = metadata_channel->metadata_stream; |
377 | assert(metadata_stream); | |
d2956687 | 378 | |
fa27abe8 | 379 | pthread_mutex_lock(&metadata_stream->lock); |
d2956687 JG |
380 | assert(metadata_channel->trace_chunk); |
381 | assert(metadata_stream->trace_chunk); | |
07b86b52 | 382 | |
d771f832 | 383 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 384 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
385 | use_relayd = 1; |
386 | } | |
387 | ||
388 | if (use_relayd) { | |
10a50311 | 389 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 390 | if (ret < 0) { |
fa27abe8 | 391 | goto error_snapshot; |
e2039c7a | 392 | } |
e2039c7a | 393 | } else { |
d2956687 JG |
394 | ret = consumer_stream_create_output_files(metadata_stream, |
395 | false); | |
e2039c7a | 396 | if (ret < 0) { |
fa27abe8 | 397 | goto error_snapshot; |
e2039c7a | 398 | } |
07b86b52 | 399 | } |
07b86b52 | 400 | |
d771f832 | 401 | do { |
9ce5646a MD |
402 | health_code_update(); |
403 | ||
6f9449c2 | 404 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 405 | if (ret_read < 0) { |
56591bac | 406 | if (ret_read != -EAGAIN) { |
6a00837f | 407 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
d771f832 | 408 | ret_read); |
fa27abe8 JG |
409 | ret = ret_read; |
410 | goto error_snapshot; | |
07b86b52 | 411 | } |
d771f832 | 412 | /* ret_read is negative at this point so we will exit the loop. */ |
07b86b52 JD |
413 | continue; |
414 | } | |
d771f832 | 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 JG |
437 | error_snapshot: |
438 | pthread_mutex_unlock(&metadata_stream->lock); | |
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 { |
d2956687 | 968 | pthread_mutex_lock(&channel->lock); |
3eb928aa | 969 | if (msg.u.snapshot_channel.metadata == 1) { |
0c5b3718 SM |
970 | int ret_snapshot; |
971 | ||
972 | ret_snapshot = lttng_kconsumer_snapshot_metadata( | |
973 | channel, key, | |
3eb928aa | 974 | msg.u.snapshot_channel.pathname, |
0c5b3718 SM |
975 | msg.u.snapshot_channel.relayd_id, |
976 | ctx); | |
977 | if (ret_snapshot < 0) { | |
3eb928aa MD |
978 | ERR("Snapshot metadata failed"); |
979 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
980 | } | |
981 | } else { | |
0c5b3718 SM |
982 | int ret_snapshot; |
983 | ||
984 | ret_snapshot = lttng_kconsumer_snapshot_channel( | |
985 | channel, key, | |
3eb928aa MD |
986 | msg.u.snapshot_channel.pathname, |
987 | msg.u.snapshot_channel.relayd_id, | |
0c5b3718 SM |
988 | msg.u.snapshot_channel |
989 | .nb_packets_per_stream, | |
3eb928aa | 990 | ctx); |
0c5b3718 | 991 | if (ret_snapshot < 0) { |
3eb928aa MD |
992 | ERR("Snapshot channel failed"); |
993 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
994 | } | |
07b86b52 | 995 | } |
d2956687 | 996 | pthread_mutex_unlock(&channel->lock); |
07b86b52 | 997 | } |
9ce5646a MD |
998 | health_code_update(); |
999 | ||
0c5b3718 SM |
1000 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1001 | if (ret_send_status < 0) { | |
6dc3064a DG |
1002 | /* Somehow, the session daemon is not responding anymore. */ |
1003 | goto end_nosignal; | |
1004 | } | |
1005 | break; | |
1006 | } | |
07b86b52 JD |
1007 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
1008 | { | |
1009 | uint64_t key = msg.u.destroy_channel.key; | |
1010 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 1011 | int ret_send_status; |
07b86b52 JD |
1012 | |
1013 | channel = consumer_find_channel(key); | |
1014 | if (!channel) { | |
1015 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 1016 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
1017 | } |
1018 | ||
9ce5646a MD |
1019 | health_code_update(); |
1020 | ||
0c5b3718 SM |
1021 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1022 | if (ret_send_status < 0) { | |
07b86b52 | 1023 | /* Somehow, the session daemon is not responding anymore. */ |
a9d36096 | 1024 | goto end_destroy_channel; |
07b86b52 JD |
1025 | } |
1026 | ||
9ce5646a MD |
1027 | health_code_update(); |
1028 | ||
15dc512a DG |
1029 | /* Stop right now if no channel was found. */ |
1030 | if (!channel) { | |
a9d36096 | 1031 | goto end_destroy_channel; |
15dc512a DG |
1032 | } |
1033 | ||
07b86b52 JD |
1034 | /* |
1035 | * This command should ONLY be issued for channel with streams set in | |
1036 | * no monitor mode. | |
1037 | */ | |
1038 | assert(!channel->monitor); | |
1039 | ||
1040 | /* | |
1041 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1042 | * monitor mode. | |
1043 | */ | |
1044 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
1045 | ||
1046 | consumer_del_channel(channel); | |
a9d36096 | 1047 | end_destroy_channel: |
07b86b52 JD |
1048 | goto end_nosignal; |
1049 | } | |
fb83fe64 JD |
1050 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1051 | { | |
66ab32be JD |
1052 | ssize_t ret; |
1053 | uint64_t count; | |
fb83fe64 JD |
1054 | struct lttng_consumer_channel *channel; |
1055 | uint64_t id = msg.u.discarded_events.session_id; | |
1056 | uint64_t key = msg.u.discarded_events.channel_key; | |
1057 | ||
e5742757 MD |
1058 | DBG("Kernel consumer discarded events command for session id %" |
1059 | PRIu64 ", channel key %" PRIu64, id, key); | |
1060 | ||
fb83fe64 JD |
1061 | channel = consumer_find_channel(key); |
1062 | if (!channel) { | |
1063 | ERR("Kernel consumer discarded events channel %" | |
1064 | PRIu64 " not found", key); | |
66ab32be | 1065 | count = 0; |
e5742757 | 1066 | } else { |
66ab32be | 1067 | count = channel->discarded_events; |
fb83fe64 JD |
1068 | } |
1069 | ||
fb83fe64 JD |
1070 | health_code_update(); |
1071 | ||
1072 | /* Send back returned value to session daemon */ | |
66ab32be | 1073 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1074 | if (ret < 0) { |
1075 | PERROR("send discarded events"); | |
1076 | goto error_fatal; | |
1077 | } | |
1078 | ||
1079 | break; | |
1080 | } | |
1081 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1082 | { | |
66ab32be JD |
1083 | ssize_t ret; |
1084 | uint64_t count; | |
fb83fe64 JD |
1085 | struct lttng_consumer_channel *channel; |
1086 | uint64_t id = msg.u.lost_packets.session_id; | |
1087 | uint64_t key = msg.u.lost_packets.channel_key; | |
1088 | ||
e5742757 MD |
1089 | DBG("Kernel consumer lost packets command for session id %" |
1090 | PRIu64 ", channel key %" PRIu64, id, key); | |
1091 | ||
fb83fe64 JD |
1092 | channel = consumer_find_channel(key); |
1093 | if (!channel) { | |
1094 | ERR("Kernel consumer lost packets channel %" | |
1095 | PRIu64 " not found", key); | |
66ab32be | 1096 | count = 0; |
e5742757 | 1097 | } else { |
66ab32be | 1098 | count = channel->lost_packets; |
fb83fe64 JD |
1099 | } |
1100 | ||
fb83fe64 JD |
1101 | health_code_update(); |
1102 | ||
1103 | /* Send back returned value to session daemon */ | |
66ab32be | 1104 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1105 | if (ret < 0) { |
1106 | PERROR("send lost packets"); | |
1107 | goto error_fatal; | |
1108 | } | |
1109 | ||
1110 | break; | |
1111 | } | |
b3530820 JG |
1112 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1113 | { | |
1114 | int channel_monitor_pipe; | |
0c5b3718 SM |
1115 | int ret_send_status, ret_set_channel_monitor_pipe; |
1116 | ssize_t ret_recv; | |
b3530820 JG |
1117 | |
1118 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1119 | /* Successfully received the command's type. */ | |
0c5b3718 SM |
1120 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1121 | if (ret_send_status < 0) { | |
b3530820 JG |
1122 | goto error_fatal; |
1123 | } | |
1124 | ||
0c5b3718 SM |
1125 | ret_recv = lttcomm_recv_fds_unix_sock( |
1126 | sock, &channel_monitor_pipe, 1); | |
1127 | if (ret_recv != sizeof(channel_monitor_pipe)) { | |
b3530820 JG |
1128 | ERR("Failed to receive channel monitor pipe"); |
1129 | goto error_fatal; | |
1130 | } | |
1131 | ||
1132 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
0c5b3718 SM |
1133 | ret_set_channel_monitor_pipe = |
1134 | consumer_timer_thread_set_channel_monitor_pipe( | |
1135 | channel_monitor_pipe); | |
1136 | if (!ret_set_channel_monitor_pipe) { | |
b3530820 | 1137 | int flags; |
0c5b3718 | 1138 | int ret_fcntl; |
b3530820 JG |
1139 | |
1140 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1141 | /* Set the pipe as non-blocking. */ | |
0c5b3718 SM |
1142 | ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); |
1143 | if (ret_fcntl == -1) { | |
b3530820 JG |
1144 | PERROR("fcntl get flags of the channel monitoring pipe"); |
1145 | goto error_fatal; | |
1146 | } | |
0c5b3718 | 1147 | flags = ret_fcntl; |
b3530820 | 1148 | |
0c5b3718 | 1149 | ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, |
b3530820 | 1150 | flags | O_NONBLOCK); |
0c5b3718 | 1151 | if (ret_fcntl == -1) { |
b3530820 JG |
1152 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); |
1153 | goto error_fatal; | |
1154 | } | |
1155 | DBG("Channel monitor pipe set as non-blocking"); | |
1156 | } else { | |
1157 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1158 | } | |
0c5b3718 SM |
1159 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1160 | if (ret_send_status < 0) { | |
b3530820 JG |
1161 | goto error_fatal; |
1162 | } | |
1163 | break; | |
1164 | } | |
b99a8d42 JD |
1165 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1166 | { | |
92b7a7f8 MD |
1167 | struct lttng_consumer_channel *channel; |
1168 | uint64_t key = msg.u.rotate_channel.key; | |
0c5b3718 | 1169 | int ret_send_status; |
b99a8d42 | 1170 | |
92b7a7f8 | 1171 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1172 | |
92b7a7f8 MD |
1173 | channel = consumer_find_channel(key); |
1174 | if (!channel) { | |
1175 | ERR("Channel %" PRIu64 " not found", key); | |
1176 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1177 | } else { | |
1178 | /* | |
1179 | * Sample the rotate position of all the streams in this channel. | |
1180 | */ | |
0c5b3718 SM |
1181 | int ret_rotate_channel; |
1182 | ||
1183 | ret_rotate_channel = lttng_consumer_rotate_channel( | |
1184 | channel, key, | |
92b7a7f8 | 1185 | msg.u.rotate_channel.relayd_id, |
0c5b3718 SM |
1186 | msg.u.rotate_channel.metadata, ctx); |
1187 | if (ret_rotate_channel < 0) { | |
92b7a7f8 MD |
1188 | ERR("Rotate channel failed"); |
1189 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1190 | } | |
b99a8d42 | 1191 | |
92b7a7f8 MD |
1192 | health_code_update(); |
1193 | } | |
0c5b3718 SM |
1194 | |
1195 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1196 | if (ret_send_status < 0) { | |
b99a8d42 | 1197 | /* Somehow, the session daemon is not responding anymore. */ |
713bdd26 | 1198 | goto error_rotate_channel; |
b99a8d42 | 1199 | } |
92b7a7f8 MD |
1200 | if (channel) { |
1201 | /* Rotate the streams that are ready right now. */ | |
0c5b3718 SM |
1202 | int ret_rotate; |
1203 | ||
1204 | ret_rotate = lttng_consumer_rotate_ready_streams( | |
92b7a7f8 | 1205 | channel, key, ctx); |
0c5b3718 | 1206 | if (ret_rotate < 0) { |
92b7a7f8 MD |
1207 | ERR("Rotate ready streams failed"); |
1208 | } | |
b99a8d42 | 1209 | } |
b99a8d42 | 1210 | break; |
713bdd26 JG |
1211 | error_rotate_channel: |
1212 | goto end_nosignal; | |
b99a8d42 | 1213 | } |
5f3aff8b MD |
1214 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
1215 | { | |
1216 | struct lttng_consumer_channel *channel; | |
1217 | uint64_t key = msg.u.clear_channel.key; | |
0c5b3718 | 1218 | int ret_send_status; |
5f3aff8b MD |
1219 | |
1220 | channel = consumer_find_channel(key); | |
1221 | if (!channel) { | |
1222 | DBG("Channel %" PRIu64 " not found", key); | |
1223 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1224 | } else { | |
0c5b3718 SM |
1225 | int ret_clear_channel; |
1226 | ||
1227 | ret_clear_channel = | |
1228 | lttng_consumer_clear_channel(channel); | |
1229 | if (ret_clear_channel) { | |
5f3aff8b | 1230 | ERR("Clear channel failed"); |
0c5b3718 | 1231 | ret_code = ret_clear_channel; |
5f3aff8b MD |
1232 | } |
1233 | ||
1234 | health_code_update(); | |
1235 | } | |
0c5b3718 SM |
1236 | |
1237 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1238 | if (ret_send_status < 0) { | |
5f3aff8b MD |
1239 | /* Somehow, the session daemon is not responding anymore. */ |
1240 | goto end_nosignal; | |
1241 | } | |
1242 | ||
1243 | break; | |
1244 | } | |
d2956687 | 1245 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1246 | { |
0c5b3718 SM |
1247 | int ret_send_status; |
1248 | ||
d2956687 JG |
1249 | ret_code = lttng_consumer_init_command(ctx, |
1250 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1251 | health_code_update(); |
0c5b3718 SM |
1252 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1253 | if (ret_send_status < 0) { | |
00fb02ac JD |
1254 | /* Somehow, the session daemon is not responding anymore. */ |
1255 | goto end_nosignal; | |
1256 | } | |
1257 | break; | |
1258 | } | |
d2956687 | 1259 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1260 | { |
d2956687 | 1261 | const struct lttng_credentials credentials = { |
ff588497 JR |
1262 | .uid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.uid), |
1263 | .gid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.gid), | |
d2956687 JG |
1264 | }; |
1265 | const bool is_local_trace = | |
1266 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1267 | const uint64_t relayd_id = | |
1268 | msg.u.create_trace_chunk.relayd_id.value; | |
1269 | const char *chunk_override_name = | |
1270 | *msg.u.create_trace_chunk.override_name ? | |
1271 | msg.u.create_trace_chunk.override_name : | |
1272 | NULL; | |
cbf53d23 | 1273 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
d88744a4 | 1274 | |
d2956687 JG |
1275 | /* |
1276 | * The session daemon will only provide a chunk directory file | |
1277 | * descriptor for local traces. | |
1278 | */ | |
1279 | if (is_local_trace) { | |
1280 | int chunk_dirfd; | |
0c5b3718 SM |
1281 | int ret_send_status; |
1282 | ssize_t ret_recv; | |
19990ed5 | 1283 | |
d2956687 | 1284 | /* Acnowledge the reception of the command. */ |
0c5b3718 SM |
1285 | ret_send_status = consumer_send_status_msg( |
1286 | sock, LTTCOMM_CONSUMERD_SUCCESS); | |
1287 | if (ret_send_status < 0) { | |
d2956687 JG |
1288 | /* Somehow, the session daemon is not responding anymore. */ |
1289 | goto end_nosignal; | |
1290 | } | |
92816cc3 | 1291 | |
0c5b3718 SM |
1292 | ret_recv = lttcomm_recv_fds_unix_sock( |
1293 | sock, &chunk_dirfd, 1); | |
1294 | if (ret_recv != sizeof(chunk_dirfd)) { | |
d2956687 JG |
1295 | ERR("Failed to receive trace chunk directory file descriptor"); |
1296 | goto error_fatal; | |
1297 | } | |
92816cc3 | 1298 | |
d2956687 JG |
1299 | DBG("Received trace chunk directory fd (%d)", |
1300 | chunk_dirfd); | |
cbf53d23 | 1301 | chunk_directory_handle = lttng_directory_handle_create_from_dirfd( |
d2956687 | 1302 | chunk_dirfd); |
cbf53d23 | 1303 | if (!chunk_directory_handle) { |
d2956687 JG |
1304 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); |
1305 | if (close(chunk_dirfd)) { | |
1306 | PERROR("Failed to close chunk directory file descriptor"); | |
1307 | } | |
1308 | goto error_fatal; | |
1309 | } | |
92816cc3 JG |
1310 | } |
1311 | ||
d2956687 JG |
1312 | ret_code = lttng_consumer_create_trace_chunk( |
1313 | !is_local_trace ? &relayd_id : NULL, | |
1314 | msg.u.create_trace_chunk.session_id, | |
1315 | msg.u.create_trace_chunk.chunk_id, | |
e5add6d0 JG |
1316 | (time_t) msg.u.create_trace_chunk |
1317 | .creation_timestamp, | |
d2956687 | 1318 | chunk_override_name, |
e5add6d0 JG |
1319 | msg.u.create_trace_chunk.credentials.is_set ? |
1320 | &credentials : | |
1321 | NULL, | |
cbf53d23 JG |
1322 | chunk_directory_handle); |
1323 | lttng_directory_handle_put(chunk_directory_handle); | |
d2956687 | 1324 | goto end_msg_sessiond; |
d88744a4 | 1325 | } |
d2956687 | 1326 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1327 | { |
bbc4768c JG |
1328 | enum lttng_trace_chunk_command_type close_command = |
1329 | msg.u.close_trace_chunk.close_command.value; | |
d2956687 JG |
1330 | const uint64_t relayd_id = |
1331 | msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f MD |
1332 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1333 | char path[LTTNG_PATH_MAX]; | |
0c5b3718 | 1334 | ssize_t ret_send; |
d2956687 JG |
1335 | |
1336 | ret_code = lttng_consumer_close_trace_chunk( | |
1337 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
bbc4768c JG |
1338 | &relayd_id : |
1339 | NULL, | |
d2956687 JG |
1340 | msg.u.close_trace_chunk.session_id, |
1341 | msg.u.close_trace_chunk.chunk_id, | |
bbc4768c JG |
1342 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1343 | msg.u.close_trace_chunk.close_command.is_set ? | |
1344 | &close_command : | |
ecd1a12f MD |
1345 | NULL, path); |
1346 | reply.ret_code = ret_code; | |
1347 | reply.path_length = strlen(path) + 1; | |
0c5b3718 SM |
1348 | ret_send = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
1349 | if (ret_send != sizeof(reply)) { | |
ecd1a12f MD |
1350 | goto error_fatal; |
1351 | } | |
0c5b3718 SM |
1352 | ret_send = lttcomm_send_unix_sock( |
1353 | sock, path, reply.path_length); | |
1354 | if (ret_send != reply.path_length) { | |
ecd1a12f MD |
1355 | goto error_fatal; |
1356 | } | |
1357 | goto end_nosignal; | |
3654ed19 | 1358 | } |
d2956687 | 1359 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 1360 | { |
d2956687 JG |
1361 | const uint64_t relayd_id = |
1362 | msg.u.trace_chunk_exists.relayd_id.value; | |
1363 | ||
1364 | ret_code = lttng_consumer_trace_chunk_exists( | |
1365 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1366 | &relayd_id : NULL, | |
1367 | msg.u.trace_chunk_exists.session_id, | |
1368 | msg.u.trace_chunk_exists.chunk_id); | |
1369 | goto end_msg_sessiond; | |
a1ae2ea5 | 1370 | } |
04ed9e10 JG |
1371 | case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: |
1372 | { | |
1373 | const uint64_t key = msg.u.open_channel_packets.key; | |
1374 | struct lttng_consumer_channel *channel = | |
1375 | consumer_find_channel(key); | |
1376 | ||
1377 | if (channel) { | |
1378 | pthread_mutex_lock(&channel->lock); | |
1379 | ret_code = lttng_consumer_open_channel_packets(channel); | |
1380 | pthread_mutex_unlock(&channel->lock); | |
1381 | } else { | |
1382 | WARN("Channel %" PRIu64 " not found", key); | |
1383 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1384 | } | |
1385 | ||
1386 | health_code_update(); | |
1387 | goto end_msg_sessiond; | |
1388 | } | |
3bd1e081 | 1389 | default: |
3f8e211f | 1390 | goto end_nosignal; |
3bd1e081 | 1391 | } |
3f8e211f | 1392 | |
3bd1e081 | 1393 | end_nosignal: |
4cbc1a04 DG |
1394 | /* |
1395 | * Return 1 to indicate success since the 0 value can be a socket | |
1396 | * shutdown during the recv() or send() call. | |
1397 | */ | |
0c5b3718 | 1398 | ret_func = 1; |
c5c7998f JG |
1399 | goto end; |
1400 | error_fatal: | |
1401 | /* This will issue a consumer stop. */ | |
0c5b3718 | 1402 | ret_func = -1; |
c5c7998f | 1403 | goto end; |
d2956687 JG |
1404 | end_msg_sessiond: |
1405 | /* | |
1406 | * The returned value here is not useful since either way we'll return 1 to | |
1407 | * the caller because the session daemon socket management is done | |
1408 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1409 | */ | |
0c5b3718 SM |
1410 | { |
1411 | int ret_send_status; | |
1412 | ||
1413 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1414 | if (ret_send_status < 0) { | |
1415 | goto error_fatal; | |
1416 | } | |
d2956687 | 1417 | } |
0c5b3718 SM |
1418 | |
1419 | ret_func = 1; | |
1420 | ||
c5c7998f | 1421 | end: |
d2956687 | 1422 | health_code_update(); |
1803a064 | 1423 | rcu_read_unlock(); |
0c5b3718 | 1424 | return ret_func; |
3bd1e081 | 1425 | } |
d41f73b7 | 1426 | |
94d49140 JD |
1427 | /* |
1428 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1429 | * metadata thread can consumer them. | |
1430 | * | |
1431 | * Metadata stream lock MUST be acquired. | |
94d49140 | 1432 | */ |
577eea73 JG |
1433 | enum sync_metadata_status lttng_kconsumer_sync_metadata( |
1434 | struct lttng_consumer_stream *metadata) | |
94d49140 JD |
1435 | { |
1436 | int ret; | |
577eea73 | 1437 | enum sync_metadata_status status; |
94d49140 JD |
1438 | |
1439 | assert(metadata); | |
1440 | ||
1441 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1442 | if (ret < 0) { | |
1443 | ERR("Failed to flush kernel stream"); | |
577eea73 | 1444 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
1445 | goto end; |
1446 | } | |
1447 | ||
1448 | ret = kernctl_snapshot(metadata->wait_fd); | |
1449 | if (ret < 0) { | |
577eea73 JG |
1450 | if (errno == EAGAIN) { |
1451 | /* No new metadata, exit. */ | |
1452 | DBG("Sync metadata, no new kernel metadata"); | |
1453 | status = SYNC_METADATA_STATUS_NO_DATA; | |
1454 | } else { | |
94d49140 | 1455 | ERR("Sync metadata, taking kernel snapshot failed."); |
577eea73 | 1456 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 | 1457 | } |
577eea73 JG |
1458 | } else { |
1459 | status = SYNC_METADATA_STATUS_NEW_DATA; | |
94d49140 JD |
1460 | } |
1461 | ||
1462 | end: | |
577eea73 | 1463 | return status; |
94d49140 | 1464 | } |
309167d2 | 1465 | |
fb83fe64 | 1466 | static |
6f9449c2 JG |
1467 | int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1468 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1469 | { |
1470 | int ret; | |
fb83fe64 | 1471 | |
6f9449c2 JG |
1472 | ret = kernctl_get_subbuf_size( |
1473 | stream->wait_fd, &subbuf->info.data.subbuf_size); | |
1474 | if (ret) { | |
fb83fe64 JD |
1475 | goto end; |
1476 | } | |
fb83fe64 | 1477 | |
6f9449c2 JG |
1478 | ret = kernctl_get_padded_subbuf_size( |
1479 | stream->wait_fd, &subbuf->info.data.padded_subbuf_size); | |
1480 | if (ret) { | |
fb83fe64 JD |
1481 | goto end; |
1482 | } | |
fb83fe64 JD |
1483 | |
1484 | end: | |
1485 | return ret; | |
1486 | } | |
1487 | ||
93ec662e | 1488 | static |
6f9449c2 JG |
1489 | int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1490 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1491 | { |
1492 | int ret; | |
93ec662e | 1493 | |
6f9449c2 JG |
1494 | ret = extract_common_subbuffer_info(stream, subbuf); |
1495 | if (ret) { | |
93ec662e JD |
1496 | goto end; |
1497 | } | |
1498 | ||
6f9449c2 JG |
1499 | ret = kernctl_get_metadata_version( |
1500 | stream->wait_fd, &subbuf->info.metadata.version); | |
1501 | if (ret) { | |
93ec662e JD |
1502 | goto end; |
1503 | } | |
1504 | ||
93ec662e JD |
1505 | end: |
1506 | return ret; | |
1507 | } | |
1508 | ||
6f9449c2 JG |
1509 | static |
1510 | int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, | |
1511 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1512 | { |
6f9449c2 | 1513 | int ret; |
d41f73b7 | 1514 | |
6f9449c2 JG |
1515 | ret = extract_common_subbuffer_info(stream, subbuf); |
1516 | if (ret) { | |
1517 | goto end; | |
1518 | } | |
309167d2 | 1519 | |
6f9449c2 JG |
1520 | ret = kernctl_get_packet_size( |
1521 | stream->wait_fd, &subbuf->info.data.packet_size); | |
1522 | if (ret < 0) { | |
1523 | PERROR("Failed to get sub-buffer packet size"); | |
1524 | goto end; | |
1525 | } | |
02d02e31 | 1526 | |
6f9449c2 JG |
1527 | ret = kernctl_get_content_size( |
1528 | stream->wait_fd, &subbuf->info.data.content_size); | |
1529 | if (ret < 0) { | |
1530 | PERROR("Failed to get sub-buffer content size"); | |
1531 | goto end; | |
d41f73b7 MD |
1532 | } |
1533 | ||
6f9449c2 JG |
1534 | ret = kernctl_get_timestamp_begin( |
1535 | stream->wait_fd, &subbuf->info.data.timestamp_begin); | |
1536 | if (ret < 0) { | |
1537 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1538 | goto end; | |
1d4dfdef DG |
1539 | } |
1540 | ||
6f9449c2 JG |
1541 | ret = kernctl_get_timestamp_end( |
1542 | stream->wait_fd, &subbuf->info.data.timestamp_end); | |
1543 | if (ret < 0) { | |
1544 | PERROR("Failed to get sub-buffer end timestamp"); | |
1545 | goto end; | |
1546 | } | |
1547 | ||
1548 | ret = kernctl_get_events_discarded( | |
1549 | stream->wait_fd, &subbuf->info.data.events_discarded); | |
1550 | if (ret) { | |
1551 | PERROR("Failed to get sub-buffer events discarded count"); | |
1552 | goto end; | |
1553 | } | |
1554 | ||
1555 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
1556 | &subbuf->info.data.sequence_number.value); | |
1557 | if (ret) { | |
1558 | /* May not be supported by older LTTng-modules. */ | |
1559 | if (ret != -ENOTTY) { | |
1560 | PERROR("Failed to get sub-buffer sequence number"); | |
1561 | goto end; | |
fb83fe64 | 1562 | } |
1c20f0e2 | 1563 | } else { |
6f9449c2 | 1564 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1565 | } |
1566 | ||
6f9449c2 JG |
1567 | ret = kernctl_get_stream_id( |
1568 | stream->wait_fd, &subbuf->info.data.stream_id); | |
1569 | if (ret < 0) { | |
1570 | PERROR("Failed to get stream id"); | |
1571 | goto end; | |
1572 | } | |
1d4dfdef | 1573 | |
6f9449c2 JG |
1574 | ret = kernctl_get_instance_id(stream->wait_fd, |
1575 | &subbuf->info.data.stream_instance_id.value); | |
1576 | if (ret) { | |
1577 | /* May not be supported by older LTTng-modules. */ | |
1578 | if (ret != -ENOTTY) { | |
1579 | PERROR("Failed to get stream instance id"); | |
1580 | goto end; | |
1d4dfdef | 1581 | } |
6f9449c2 JG |
1582 | } else { |
1583 | subbuf->info.data.stream_instance_id.is_set = true; | |
1584 | } | |
1585 | end: | |
1586 | return ret; | |
1587 | } | |
47e81c02 | 1588 | |
6f9449c2 JG |
1589 | static |
1590 | int get_subbuffer_common(struct lttng_consumer_stream *stream, | |
1591 | struct stream_subbuffer *subbuffer) | |
1592 | { | |
1593 | int ret; | |
1594 | ||
1595 | ret = kernctl_get_next_subbuf(stream->wait_fd); | |
1596 | if (ret) { | |
1597 | goto end; | |
1598 | } | |
1599 | ||
1600 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1601 | stream, subbuffer); | |
1602 | end: | |
1603 | return ret; | |
1604 | } | |
128708c3 | 1605 | |
6f9449c2 JG |
1606 | static |
1607 | int get_next_subbuffer_splice(struct lttng_consumer_stream *stream, | |
1608 | struct stream_subbuffer *subbuffer) | |
1609 | { | |
1610 | int ret; | |
1d4dfdef | 1611 | |
6f9449c2 JG |
1612 | ret = get_subbuffer_common(stream, subbuffer); |
1613 | if (ret) { | |
1614 | goto end; | |
1615 | } | |
1d4dfdef | 1616 | |
6f9449c2 JG |
1617 | subbuffer->buffer.fd = stream->wait_fd; |
1618 | end: | |
1619 | return ret; | |
1620 | } | |
fd424d99 | 1621 | |
6f9449c2 JG |
1622 | static |
1623 | int get_next_subbuffer_mmap(struct lttng_consumer_stream *stream, | |
1624 | struct stream_subbuffer *subbuffer) | |
1625 | { | |
1626 | int ret; | |
1627 | const char *addr; | |
1628 | ||
1629 | ret = get_subbuffer_common(stream, subbuffer); | |
1630 | if (ret) { | |
1631 | goto end; | |
128708c3 | 1632 | } |
6f9449c2 JG |
1633 | |
1634 | ret = get_current_subbuf_addr(stream, &addr); | |
1635 | if (ret) { | |
1636 | goto end; | |
d41f73b7 | 1637 | } |
6f9449c2 JG |
1638 | |
1639 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1640 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1641 | end: | |
1642 | return ret; | |
1643 | } | |
1644 | ||
f5ba75b4 JG |
1645 | static |
1646 | int get_next_subbuffer_metadata_check(struct lttng_consumer_stream *stream, | |
1647 | struct stream_subbuffer *subbuffer) | |
1648 | { | |
1649 | int ret; | |
1650 | const char *addr; | |
1651 | bool coherent; | |
1652 | ||
1653 | ret = kernctl_get_next_subbuf_metadata_check(stream->wait_fd, | |
1654 | &coherent); | |
1655 | if (ret) { | |
1656 | goto end; | |
1657 | } | |
1658 | ||
1659 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1660 | stream, subbuffer); | |
1661 | if (ret) { | |
1662 | goto end; | |
1663 | } | |
1664 | ||
1665 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
1666 | ||
1667 | ret = get_current_subbuf_addr(stream, &addr); | |
1668 | if (ret) { | |
1669 | goto end; | |
1670 | } | |
1671 | ||
1672 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1673 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1674 | DBG("Got metadata packet with padded_subbuf_size = %lu, coherent = %s", | |
1675 | subbuffer->info.metadata.padded_subbuf_size, | |
1676 | coherent ? "true" : "false"); | |
1677 | end: | |
1678 | return ret; | |
1679 | } | |
1680 | ||
6f9449c2 JG |
1681 | static |
1682 | int put_next_subbuffer(struct lttng_consumer_stream *stream, | |
1683 | struct stream_subbuffer *subbuffer) | |
1684 | { | |
1685 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1686 | ||
1687 | if (ret) { | |
1688 | if (ret == -EFAULT) { | |
1689 | PERROR("Error in unreserving sub buffer"); | |
1690 | } else if (ret == -EIO) { | |
d41f73b7 | 1691 | /* Should never happen with newer LTTng versions */ |
6f9449c2 | 1692 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); |
d41f73b7 | 1693 | } |
d41f73b7 MD |
1694 | } |
1695 | ||
6f9449c2 JG |
1696 | return ret; |
1697 | } | |
1c20f0e2 | 1698 | |
f5ba75b4 JG |
1699 | static |
1700 | bool is_get_next_check_metadata_available(int tracer_fd) | |
1701 | { | |
1702 | return kernctl_get_next_subbuf_metadata_check(tracer_fd, NULL) != | |
1703 | -ENOTTY; | |
1704 | } | |
1705 | ||
1706 | static | |
1707 | int lttng_kconsumer_set_stream_ops( | |
6f9449c2 JG |
1708 | struct lttng_consumer_stream *stream) |
1709 | { | |
f5ba75b4 JG |
1710 | int ret = 0; |
1711 | ||
1712 | if (stream->metadata_flag && stream->chan->is_live) { | |
1713 | DBG("Attempting to enable metadata bucketization for live consumers"); | |
1714 | if (is_get_next_check_metadata_available(stream->wait_fd)) { | |
1715 | DBG("Kernel tracer supports get_next_subbuffer_metadata_check, metadata will be accumulated until a coherent state is reached"); | |
1716 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1717 | get_next_subbuffer_metadata_check; | |
1718 | ret = consumer_stream_enable_metadata_bucketization( | |
1719 | stream); | |
1720 | if (ret) { | |
1721 | goto end; | |
1722 | } | |
1723 | } else { | |
1724 | /* | |
1725 | * The kernel tracer version is too old to indicate | |
1726 | * when the metadata stream has reached a "coherent" | |
1727 | * (parseable) point. | |
1728 | * | |
1729 | * This means that a live viewer may see an incoherent | |
1730 | * sequence of metadata and fail to parse it. | |
1731 | */ | |
1732 | WARN("Kernel tracer does not support get_next_subbuffer_metadata_check which may cause live clients to fail to parse the metadata stream"); | |
1733 | metadata_bucket_destroy(stream->metadata_bucket); | |
1734 | stream->metadata_bucket = NULL; | |
1735 | } | |
1736 | } | |
1737 | ||
1738 | if (!stream->read_subbuffer_ops.get_next_subbuffer) { | |
1739 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
1740 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1741 | get_next_subbuffer_mmap; | |
1742 | } else { | |
1743 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1744 | get_next_subbuffer_splice; | |
1745 | } | |
94d49140 JD |
1746 | } |
1747 | ||
6f9449c2 JG |
1748 | if (stream->metadata_flag) { |
1749 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1750 | extract_metadata_subbuffer_info; | |
1751 | } else { | |
1752 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1753 | extract_data_subbuffer_info; | |
1754 | if (stream->chan->is_live) { | |
1755 | stream->read_subbuffer_ops.send_live_beacon = | |
1756 | consumer_flush_kernel_index; | |
1757 | } | |
309167d2 JD |
1758 | } |
1759 | ||
6f9449c2 | 1760 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; |
f5ba75b4 JG |
1761 | end: |
1762 | return ret; | |
d41f73b7 MD |
1763 | } |
1764 | ||
1765 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1766 | { | |
1767 | int ret; | |
ffe60014 DG |
1768 | |
1769 | assert(stream); | |
1770 | ||
2bba9e53 | 1771 | /* |
d2956687 JG |
1772 | * Don't create anything if this is set for streaming or if there is |
1773 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1774 | */ |
d2956687 JG |
1775 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1776 | stream->chan->trace_chunk) { | |
1777 | ret = consumer_stream_create_output_files(stream, true); | |
1778 | if (ret) { | |
fe4477ee JD |
1779 | goto error; |
1780 | } | |
ffe60014 | 1781 | } |
d41f73b7 | 1782 | |
d41f73b7 MD |
1783 | if (stream->output == LTTNG_EVENT_MMAP) { |
1784 | /* get the len of the mmap region */ | |
1785 | unsigned long mmap_len; | |
1786 | ||
1787 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1788 | if (ret != 0) { | |
ffe60014 | 1789 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1790 | goto error_close_fd; |
1791 | } | |
1792 | stream->mmap_len = (size_t) mmap_len; | |
1793 | ||
ffe60014 DG |
1794 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1795 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1796 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1797 | PERROR("Error mmaping"); |
d41f73b7 MD |
1798 | ret = -1; |
1799 | goto error_close_fd; | |
1800 | } | |
1801 | } | |
1802 | ||
f5ba75b4 JG |
1803 | ret = lttng_kconsumer_set_stream_ops(stream); |
1804 | if (ret) { | |
1805 | goto error_close_fd; | |
1806 | } | |
6f9449c2 | 1807 | |
d41f73b7 MD |
1808 | /* we return 0 to let the library handle the FD internally */ |
1809 | return 0; | |
1810 | ||
1811 | error_close_fd: | |
2f225ce2 | 1812 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1813 | int err; |
1814 | ||
1815 | err = close(stream->out_fd); | |
1816 | assert(!err); | |
2f225ce2 | 1817 | stream->out_fd = -1; |
d41f73b7 MD |
1818 | } |
1819 | error: | |
1820 | return ret; | |
1821 | } | |
1822 | ||
ca22feea DG |
1823 | /* |
1824 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1825 | * stream. Consumer data lock MUST be acquired before calling this function |
1826 | * and the stream lock. | |
ca22feea | 1827 | * |
6d805429 | 1828 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1829 | * data is available for trace viewer reading. |
1830 | */ | |
6d805429 | 1831 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1832 | { |
1833 | int ret; | |
1834 | ||
1835 | assert(stream); | |
1836 | ||
873b9e9a MD |
1837 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1838 | ret = 0; | |
1839 | goto end; | |
1840 | } | |
1841 | ||
ca22feea DG |
1842 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1843 | if (ret == 0) { | |
1844 | /* There is still data so let's put back this subbuffer. */ | |
1845 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1846 | assert(ret == 0); | |
6d805429 | 1847 | ret = 1; /* Data is pending */ |
4e9a4686 | 1848 | goto end; |
ca22feea DG |
1849 | } |
1850 | ||
6d805429 DG |
1851 | /* Data is NOT pending and ready to be read. */ |
1852 | ret = 0; | |
ca22feea | 1853 | |
6efae65e DG |
1854 | end: |
1855 | return ret; | |
ca22feea | 1856 | } |