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 | ||
dee2d256 JR |
139 | static void finalize_snapshot_stream( |
140 | struct lttng_consumer_stream *stream, uint64_t relayd_id) | |
141 | { | |
142 | ASSERT_LOCKED(stream->lock); | |
143 | ||
144 | if (relayd_id == (uint64_t) -1ULL) { | |
145 | if (stream->out_fd >= 0) { | |
146 | const int ret = close(stream->out_fd); | |
147 | ||
148 | if (ret < 0) { | |
149 | PERROR("Failed to close stream snapshot output file descriptor"); | |
150 | } | |
151 | ||
152 | stream->out_fd = -1; | |
153 | } | |
154 | } else { | |
155 | close_relayd_stream(stream); | |
156 | stream->net_seq_idx = (uint64_t) -1ULL; | |
157 | } | |
158 | ||
159 | lttng_trace_chunk_put(stream->trace_chunk); | |
160 | stream->trace_chunk = NULL; | |
161 | } | |
162 | ||
07b86b52 JD |
163 | /* |
164 | * Take a snapshot of all the stream of a channel | |
3eb928aa | 165 | * RCU read-side lock must be held across this function to ensure existence of |
a48ac75a | 166 | * channel. |
07b86b52 JD |
167 | * |
168 | * Returns 0 on success, < 0 on error | |
169 | */ | |
f72bb42f JG |
170 | static int lttng_kconsumer_snapshot_channel( |
171 | struct lttng_consumer_channel *channel, | |
172 | uint64_t key, char *path, uint64_t relayd_id, | |
173 | uint64_t nb_packets_per_stream, | |
5c786ded | 174 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
175 | { |
176 | int ret; | |
07b86b52 JD |
177 | struct lttng_consumer_stream *stream; |
178 | ||
6a00837f | 179 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 | 180 | |
a48ac75a JR |
181 | /* Prevent channel modifications while we perform the snapshot.*/ |
182 | pthread_mutex_lock(&channel->lock); | |
183 | ||
07b86b52 JD |
184 | rcu_read_lock(); |
185 | ||
07b86b52 JD |
186 | /* Splice is not supported yet for channel snapshot. */ |
187 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
9381314c JG |
188 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
189 | channel->name); | |
07b86b52 JD |
190 | ret = -1; |
191 | goto end; | |
192 | } | |
193 | ||
10a50311 | 194 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 195 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
196 | |
197 | health_code_update(); | |
198 | ||
07b86b52 JD |
199 | /* |
200 | * Lock stream because we are about to change its state. | |
201 | */ | |
202 | pthread_mutex_lock(&stream->lock); | |
203 | ||
d2956687 JG |
204 | assert(channel->trace_chunk); |
205 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { | |
206 | /* | |
207 | * Can't happen barring an internal error as the channel | |
208 | * holds a reference to the trace chunk. | |
209 | */ | |
210 | ERR("Failed to acquire reference to channel's trace chunk"); | |
211 | ret = -1; | |
212 | goto end_unlock; | |
213 | } | |
214 | assert(!stream->trace_chunk); | |
215 | stream->trace_chunk = channel->trace_chunk; | |
216 | ||
29decac3 DG |
217 | /* |
218 | * Assign the received relayd ID so we can use it for streaming. The streams | |
219 | * are not visible to anyone so this is OK to change it. | |
220 | */ | |
07b86b52 JD |
221 | stream->net_seq_idx = relayd_id; |
222 | channel->relayd_id = relayd_id; | |
223 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 224 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
225 | if (ret < 0) { |
226 | ERR("sending stream to relayd"); | |
dee2d256 | 227 | goto error_finalize_stream; |
07b86b52 | 228 | } |
07b86b52 | 229 | } else { |
d2956687 JG |
230 | ret = consumer_stream_create_output_files(stream, |
231 | false); | |
07b86b52 | 232 | if (ret < 0) { |
dee2d256 | 233 | goto error_finalize_stream; |
07b86b52 | 234 | } |
d2956687 JG |
235 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
236 | stream->key); | |
07b86b52 JD |
237 | } |
238 | ||
f22dd891 | 239 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 240 | if (ret < 0) { |
f22dd891 MD |
241 | /* |
242 | * Doing a buffer flush which does not take into | |
243 | * account empty packets. This is not perfect | |
244 | * for stream intersection, but required as a | |
245 | * fall-back when "flush_empty" is not | |
246 | * implemented by lttng-modules. | |
247 | */ | |
248 | ret = kernctl_buffer_flush(stream->wait_fd); | |
249 | if (ret < 0) { | |
250 | ERR("Failed to flush kernel stream"); | |
dee2d256 | 251 | goto error_finalize_stream; |
f22dd891 | 252 | } |
07b86b52 JD |
253 | goto end_unlock; |
254 | } | |
255 | ||
256 | ret = lttng_kconsumer_take_snapshot(stream); | |
257 | if (ret < 0) { | |
258 | ERR("Taking kernel snapshot"); | |
dee2d256 | 259 | goto error_finalize_stream; |
07b86b52 JD |
260 | } |
261 | ||
262 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
263 | if (ret < 0) { | |
264 | ERR("Produced kernel snapshot position"); | |
dee2d256 | 265 | goto error_finalize_stream; |
07b86b52 JD |
266 | } |
267 | ||
268 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
269 | if (ret < 0) { | |
270 | ERR("Consumerd kernel snapshot position"); | |
dee2d256 | 271 | goto error_finalize_stream; |
07b86b52 JD |
272 | } |
273 | ||
d07ceecd MD |
274 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
275 | produced_pos, nb_packets_per_stream, | |
276 | stream->max_sb_size); | |
5c786ded | 277 | |
9377d830 | 278 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
279 | ssize_t read_len; |
280 | unsigned long len, padded_len; | |
128708c3 | 281 | const char *subbuf_addr; |
fd424d99 | 282 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 283 | |
9ce5646a | 284 | health_code_update(); |
07b86b52 JD |
285 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
286 | ||
287 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
288 | if (ret < 0) { | |
32af2c95 | 289 | if (ret != -EAGAIN) { |
07b86b52 | 290 | PERROR("kernctl_get_subbuf snapshot"); |
dee2d256 | 291 | goto error_finalize_stream; |
07b86b52 JD |
292 | } |
293 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
294 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 295 | stream->chan->lost_packets++; |
07b86b52 JD |
296 | continue; |
297 | } | |
298 | ||
299 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
300 | if (ret < 0) { | |
301 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 302 | goto error_put_subbuf; |
07b86b52 JD |
303 | } |
304 | ||
305 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
306 | if (ret < 0) { | |
307 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 308 | goto error_put_subbuf; |
07b86b52 JD |
309 | } |
310 | ||
128708c3 JG |
311 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
312 | if (ret) { | |
313 | goto error_put_subbuf; | |
314 | } | |
315 | ||
fd424d99 JG |
316 | subbuf_view = lttng_buffer_view_init( |
317 | subbuf_addr, 0, padded_len); | |
f5ba75b4 | 318 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
fd424d99 | 319 | stream, &subbuf_view, |
6f9449c2 | 320 | padded_len - len); |
07b86b52 | 321 | /* |
29decac3 DG |
322 | * We write the padded len in local tracefiles but the data len |
323 | * when using a relay. Display the error but continue processing | |
324 | * to try to release the subbuffer. | |
07b86b52 JD |
325 | */ |
326 | if (relayd_id != (uint64_t) -1ULL) { | |
327 | if (read_len != len) { | |
328 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
329 | read_len, len); | |
330 | } | |
331 | } else { | |
332 | if (read_len != padded_len) { | |
333 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
334 | read_len, padded_len); | |
335 | } | |
336 | } | |
337 | ||
338 | ret = kernctl_put_subbuf(stream->wait_fd); | |
339 | if (ret < 0) { | |
340 | ERR("Snapshot kernctl_put_subbuf"); | |
dee2d256 | 341 | goto error_finalize_stream; |
07b86b52 JD |
342 | } |
343 | consumed_pos += stream->max_sb_size; | |
344 | } | |
345 | ||
dee2d256 | 346 | finalize_snapshot_stream(stream, relayd_id); |
07b86b52 JD |
347 | pthread_mutex_unlock(&stream->lock); |
348 | } | |
349 | ||
350 | /* All good! */ | |
351 | ret = 0; | |
352 | goto end; | |
353 | ||
29decac3 DG |
354 | error_put_subbuf: |
355 | ret = kernctl_put_subbuf(stream->wait_fd); | |
356 | if (ret < 0) { | |
357 | ERR("Snapshot kernctl_put_subbuf error path"); | |
358 | } | |
dee2d256 JR |
359 | error_finalize_stream: |
360 | finalize_snapshot_stream(stream, relayd_id); | |
07b86b52 JD |
361 | end_unlock: |
362 | pthread_mutex_unlock(&stream->lock); | |
363 | end: | |
364 | rcu_read_unlock(); | |
a48ac75a | 365 | pthread_mutex_unlock(&channel->lock); |
07b86b52 JD |
366 | return ret; |
367 | } | |
368 | ||
369 | /* | |
370 | * Read the whole metadata available for a snapshot. | |
3eb928aa | 371 | * RCU read-side lock must be held across this function to ensure existence of |
a48ac75a | 372 | * metadata_channel. |
07b86b52 JD |
373 | * |
374 | * Returns 0 on success, < 0 on error | |
375 | */ | |
d2956687 JG |
376 | static int lttng_kconsumer_snapshot_metadata( |
377 | struct lttng_consumer_channel *metadata_channel, | |
3eb928aa MD |
378 | uint64_t key, char *path, uint64_t relayd_id, |
379 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 380 | { |
d771f832 DG |
381 | int ret, use_relayd = 0; |
382 | ssize_t ret_read; | |
07b86b52 | 383 | struct lttng_consumer_stream *metadata_stream; |
d771f832 DG |
384 | |
385 | assert(ctx); | |
07b86b52 JD |
386 | |
387 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
388 | key, path); | |
389 | ||
390 | rcu_read_lock(); | |
391 | ||
07b86b52 JD |
392 | metadata_stream = metadata_channel->metadata_stream; |
393 | assert(metadata_stream); | |
d2956687 | 394 | |
a48ac75a | 395 | metadata_stream->read_subbuffer_ops.lock(metadata_stream); |
d2956687 JG |
396 | assert(metadata_channel->trace_chunk); |
397 | assert(metadata_stream->trace_chunk); | |
07b86b52 | 398 | |
d771f832 | 399 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 400 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
401 | use_relayd = 1; |
402 | } | |
403 | ||
404 | if (use_relayd) { | |
10a50311 | 405 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 406 | if (ret < 0) { |
fa27abe8 | 407 | goto error_snapshot; |
e2039c7a | 408 | } |
e2039c7a | 409 | } else { |
d2956687 JG |
410 | ret = consumer_stream_create_output_files(metadata_stream, |
411 | false); | |
e2039c7a | 412 | if (ret < 0) { |
fa27abe8 | 413 | goto error_snapshot; |
e2039c7a | 414 | } |
07b86b52 | 415 | } |
07b86b52 | 416 | |
d771f832 | 417 | do { |
9ce5646a MD |
418 | health_code_update(); |
419 | ||
6f9449c2 | 420 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 421 | if (ret_read < 0) { |
684c6783 MD |
422 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
423 | ret_read); | |
424 | ret = ret_read; | |
425 | goto error_snapshot; | |
07b86b52 | 426 | } |
684c6783 | 427 | } while (ret_read > 0); |
07b86b52 | 428 | |
d771f832 DG |
429 | if (use_relayd) { |
430 | close_relayd_stream(metadata_stream); | |
431 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
432 | } else { | |
fdf9986c MD |
433 | if (metadata_stream->out_fd >= 0) { |
434 | ret = close(metadata_stream->out_fd); | |
435 | if (ret < 0) { | |
436 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
437 | /* | |
438 | * Don't go on error here since the snapshot was successful at this | |
439 | * point but somehow the close failed. | |
440 | */ | |
441 | } | |
442 | metadata_stream->out_fd = -1; | |
d2956687 JG |
443 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
444 | metadata_stream->trace_chunk = NULL; | |
e2039c7a | 445 | } |
e2039c7a JD |
446 | } |
447 | ||
07b86b52 | 448 | ret = 0; |
fa27abe8 | 449 | error_snapshot: |
a48ac75a | 450 | metadata_stream->read_subbuffer_ops.unlock(metadata_stream); |
cf53a8a6 JD |
451 | consumer_stream_destroy(metadata_stream, NULL); |
452 | metadata_channel->metadata_stream = NULL; | |
07b86b52 JD |
453 | rcu_read_unlock(); |
454 | return ret; | |
455 | } | |
456 | ||
1803a064 MD |
457 | /* |
458 | * Receive command from session daemon and process it. | |
459 | * | |
460 | * Return 1 on success else a negative value or 0. | |
461 | */ | |
3bd1e081 MD |
462 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
463 | int sock, struct pollfd *consumer_sockpoll) | |
464 | { | |
0c5b3718 | 465 | int ret_func; |
0c759fc9 | 466 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
467 | struct lttcomm_consumer_msg msg; |
468 | ||
9ce5646a MD |
469 | health_code_update(); |
470 | ||
0c5b3718 SM |
471 | { |
472 | ssize_t ret_recv; | |
473 | ||
474 | ret_recv = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
475 | if (ret_recv != sizeof(msg)) { | |
476 | if (ret_recv > 0) { | |
477 | lttng_consumer_send_error(ctx, | |
478 | LTTCOMM_CONSUMERD_ERROR_RECV_CMD); | |
479 | ret_recv = -1; | |
480 | } | |
481 | return ret_recv; | |
1803a064 | 482 | } |
3bd1e081 | 483 | } |
9ce5646a MD |
484 | |
485 | health_code_update(); | |
486 | ||
84382d49 MD |
487 | /* Deprecated command */ |
488 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 489 | |
9ce5646a MD |
490 | health_code_update(); |
491 | ||
b0b335c8 MD |
492 | /* relayd needs RCU read-side protection */ |
493 | rcu_read_lock(); | |
494 | ||
3bd1e081 | 495 | switch (msg.cmd_type) { |
00e2e675 DG |
496 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
497 | { | |
fe7bf564 JR |
498 | uint32_t major = msg.u.relayd_sock.major; |
499 | uint32_t minor = msg.u.relayd_sock.minor; | |
500 | enum lttcomm_sock_proto protocol = (enum lttcomm_sock_proto) | |
501 | msg.u.relayd_sock.relayd_socket_protocol; | |
502 | ||
f50f23d9 | 503 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 504 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
fe7bf564 JR |
505 | msg.u.relayd_sock.type, ctx, sock, |
506 | consumer_sockpoll, msg.u.relayd_sock.session_id, | |
507 | msg.u.relayd_sock.relayd_session_id, major, | |
508 | minor, protocol); | |
00e2e675 DG |
509 | goto end_nosignal; |
510 | } | |
3bd1e081 MD |
511 | case LTTNG_CONSUMER_ADD_CHANNEL: |
512 | { | |
513 | struct lttng_consumer_channel *new_channel; | |
afbf29db | 514 | int ret_send_status, ret_add_channel = 0; |
d2956687 | 515 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 516 | |
9ce5646a MD |
517 | health_code_update(); |
518 | ||
f50f23d9 | 519 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
520 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
521 | if (ret_send_status < 0) { | |
f50f23d9 | 522 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 523 | goto error_fatal; |
f50f23d9 | 524 | } |
9ce5646a MD |
525 | |
526 | health_code_update(); | |
527 | ||
d88aee68 | 528 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 529 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
d2956687 JG |
530 | msg.u.channel.session_id, |
531 | msg.u.channel.chunk_id.is_set ? | |
532 | &chunk_id : NULL, | |
533 | msg.u.channel.pathname, | |
534 | msg.u.channel.name, | |
1624d5b7 JD |
535 | msg.u.channel.relayd_id, msg.u.channel.output, |
536 | msg.u.channel.tracefile_size, | |
1950109e | 537 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 538 | msg.u.channel.monitor, |
d7ba1388 | 539 | msg.u.channel.live_timer_interval, |
a2814ea7 | 540 | msg.u.channel.is_live, |
3d071855 | 541 | NULL, NULL); |
3bd1e081 | 542 | if (new_channel == NULL) { |
f73fabfd | 543 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
544 | goto end_nosignal; |
545 | } | |
ffe60014 | 546 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
547 | switch (msg.u.channel.output) { |
548 | case LTTNG_EVENT_SPLICE: | |
549 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
550 | break; | |
551 | case LTTNG_EVENT_MMAP: | |
552 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
553 | break; | |
554 | default: | |
555 | ERR("Channel output unknown %d", msg.u.channel.output); | |
556 | goto end_nosignal; | |
557 | } | |
ffe60014 DG |
558 | |
559 | /* Translate and save channel type. */ | |
560 | switch (msg.u.channel.type) { | |
561 | case CONSUMER_CHANNEL_TYPE_DATA: | |
562 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
563 | new_channel->type = msg.u.channel.type; | |
564 | break; | |
565 | default: | |
566 | assert(0); | |
567 | goto end_nosignal; | |
568 | }; | |
569 | ||
9ce5646a MD |
570 | health_code_update(); |
571 | ||
3bd1e081 | 572 | if (ctx->on_recv_channel != NULL) { |
0c5b3718 SM |
573 | int ret_recv_channel = |
574 | ctx->on_recv_channel(new_channel); | |
575 | if (ret_recv_channel == 0) { | |
576 | ret_add_channel = consumer_add_channel( | |
577 | new_channel, ctx); | |
578 | } else if (ret_recv_channel < 0) { | |
3bd1e081 MD |
579 | goto end_nosignal; |
580 | } | |
581 | } else { | |
0c5b3718 SM |
582 | ret_add_channel = |
583 | consumer_add_channel(new_channel, ctx); | |
3bd1e081 | 584 | } |
0c5b3718 SM |
585 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && |
586 | !ret_add_channel) { | |
e9404c27 JG |
587 | int monitor_start_ret; |
588 | ||
589 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
590 | consumer_timer_live_start(new_channel, |
591 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
592 | monitor_start_ret = consumer_timer_monitor_start( |
593 | new_channel, | |
594 | msg.u.channel.monitor_timer_interval); | |
595 | if (monitor_start_ret < 0) { | |
596 | ERR("Starting channel monitoring timer failed"); | |
597 | goto end_nosignal; | |
598 | } | |
94d49140 | 599 | } |
e43c41c5 | 600 | |
9ce5646a MD |
601 | health_code_update(); |
602 | ||
e43c41c5 | 603 | /* If we received an error in add_channel, we need to report it. */ |
0c5b3718 SM |
604 | if (ret_add_channel < 0) { |
605 | ret_send_status = consumer_send_status_msg( | |
606 | sock, ret_add_channel); | |
607 | if (ret_send_status < 0) { | |
1803a064 MD |
608 | goto error_fatal; |
609 | } | |
e43c41c5 JD |
610 | goto end_nosignal; |
611 | } | |
612 | ||
3bd1e081 MD |
613 | goto end_nosignal; |
614 | } | |
615 | case LTTNG_CONSUMER_ADD_STREAM: | |
616 | { | |
dae10966 DG |
617 | int fd; |
618 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 619 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 620 | struct lttng_consumer_channel *channel; |
c80048c6 | 621 | int alloc_ret = 0; |
0c5b3718 SM |
622 | int ret_send_status, ret_poll, ret_get_max_subbuf_size; |
623 | ssize_t ret_pipe_write, ret_recv; | |
3bd1e081 | 624 | |
ffe60014 DG |
625 | /* |
626 | * Get stream's channel reference. Needed when adding the stream to the | |
627 | * global hash table. | |
628 | */ | |
629 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
630 | if (!channel) { | |
631 | /* | |
632 | * We could not find the channel. Can happen if cpu hotplug | |
633 | * happens while tearing down. | |
634 | */ | |
d88aee68 | 635 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 636 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
637 | } |
638 | ||
9ce5646a MD |
639 | health_code_update(); |
640 | ||
f50f23d9 | 641 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
642 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
643 | if (ret_send_status < 0) { | |
d771f832 | 644 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 645 | goto error_add_stream_fatal; |
1803a064 | 646 | } |
9ce5646a MD |
647 | |
648 | health_code_update(); | |
649 | ||
0c759fc9 | 650 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 651 | /* Channel was not found. */ |
c5c7998f | 652 | goto error_add_stream_nosignal; |
f50f23d9 DG |
653 | } |
654 | ||
d771f832 | 655 | /* Blocking call */ |
9ce5646a | 656 | health_poll_entry(); |
0c5b3718 | 657 | ret_poll = lttng_consumer_poll_socket(consumer_sockpoll); |
9ce5646a | 658 | health_poll_exit(); |
0c5b3718 | 659 | if (ret_poll) { |
c5c7998f | 660 | goto error_add_stream_fatal; |
3bd1e081 | 661 | } |
00e2e675 | 662 | |
9ce5646a MD |
663 | health_code_update(); |
664 | ||
00e2e675 | 665 | /* Get stream file descriptor from socket */ |
0c5b3718 SM |
666 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
667 | if (ret_recv != sizeof(fd)) { | |
f73fabfd | 668 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
0c5b3718 | 669 | ret_func = ret_recv; |
c5c7998f | 670 | goto end; |
3bd1e081 | 671 | } |
3bd1e081 | 672 | |
9ce5646a MD |
673 | health_code_update(); |
674 | ||
f50f23d9 DG |
675 | /* |
676 | * Send status code to session daemon only if the recv works. If the | |
677 | * above recv() failed, the session daemon is notified through the | |
678 | * error socket and the teardown is eventually done. | |
679 | */ | |
0c5b3718 SM |
680 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
681 | if (ret_send_status < 0) { | |
f50f23d9 | 682 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 683 | goto error_add_stream_nosignal; |
f50f23d9 DG |
684 | } |
685 | ||
9ce5646a MD |
686 | health_code_update(); |
687 | ||
d2956687 | 688 | pthread_mutex_lock(&channel->lock); |
6f9449c2 | 689 | new_stream = consumer_stream_create( |
49f45573 JG |
690 | channel, |
691 | channel->key, | |
ffe60014 | 692 | fd, |
ffe60014 | 693 | channel->name, |
ffe60014 DG |
694 | channel->relayd_id, |
695 | channel->session_id, | |
d2956687 | 696 | channel->trace_chunk, |
ffe60014 DG |
697 | msg.u.stream.cpu, |
698 | &alloc_ret, | |
4891ece8 | 699 | channel->type, |
d2956687 | 700 | channel->monitor); |
3bd1e081 | 701 | if (new_stream == NULL) { |
c80048c6 MD |
702 | switch (alloc_ret) { |
703 | case -ENOMEM: | |
704 | case -EINVAL: | |
705 | default: | |
706 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
707 | break; | |
c80048c6 | 708 | } |
d2956687 | 709 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 710 | goto error_add_stream_nosignal; |
3bd1e081 | 711 | } |
d771f832 | 712 | |
ffe60014 | 713 | new_stream->wait_fd = fd; |
0c5b3718 SM |
714 | ret_get_max_subbuf_size = kernctl_get_max_subbuf_size( |
715 | new_stream->wait_fd, &new_stream->max_sb_size); | |
716 | if (ret_get_max_subbuf_size < 0) { | |
d05185fa JG |
717 | pthread_mutex_unlock(&channel->lock); |
718 | ERR("Failed to get kernel maximal subbuffer size"); | |
c5c7998f | 719 | goto error_add_stream_nosignal; |
d05185fa JG |
720 | } |
721 | ||
d9a2e16e JD |
722 | consumer_stream_update_channel_attributes(new_stream, |
723 | channel); | |
00e2e675 | 724 | |
a0c83db9 DG |
725 | /* |
726 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
727 | * refcount right now. We don't need to increment the refcount for |
728 | * streams in no monitor because we handle manually the cleanup of | |
729 | * those. It is very important to make sure there is NO prior | |
730 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 731 | */ |
07b86b52 JD |
732 | if (channel->monitor) { |
733 | uatomic_inc(&new_stream->chan->refcount); | |
734 | } | |
9d9353f9 | 735 | |
fb3a43a9 DG |
736 | /* |
737 | * The buffer flush is done on the session daemon side for the kernel | |
738 | * so no need for the stream "hangup_flush_done" variable to be | |
739 | * tracked. This is important for a kernel stream since we don't rely | |
740 | * on the flush state of the stream to read data. It's not the case for | |
741 | * user space tracing. | |
742 | */ | |
743 | new_stream->hangup_flush_done = 0; | |
744 | ||
9ce5646a MD |
745 | health_code_update(); |
746 | ||
d2956687 | 747 | pthread_mutex_lock(&new_stream->lock); |
633d0084 | 748 | if (ctx->on_recv_stream) { |
0c5b3718 SM |
749 | int ret_recv_stream = ctx->on_recv_stream(new_stream); |
750 | if (ret_recv_stream < 0) { | |
d2956687 JG |
751 | pthread_mutex_unlock(&new_stream->lock); |
752 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 753 | consumer_stream_free(new_stream); |
c5c7998f | 754 | goto error_add_stream_nosignal; |
fb3a43a9 | 755 | } |
633d0084 | 756 | } |
9ce5646a MD |
757 | health_code_update(); |
758 | ||
07b86b52 JD |
759 | if (new_stream->metadata_flag) { |
760 | channel->metadata_stream = new_stream; | |
761 | } | |
762 | ||
2bba9e53 DG |
763 | /* Do not monitor this stream. */ |
764 | if (!channel->monitor) { | |
5eecee74 | 765 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 766 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 767 | new_stream->net_seq_idx); |
10a50311 | 768 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
d2956687 JG |
769 | pthread_mutex_unlock(&new_stream->lock); |
770 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 771 | goto end_add_stream; |
6dc3064a DG |
772 | } |
773 | ||
e1b71bdc DG |
774 | /* Send stream to relayd if the stream has an ID. */ |
775 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
776 | int ret_send_relayd_stream; |
777 | ||
778 | ret_send_relayd_stream = consumer_send_relayd_stream( | |
779 | new_stream, new_stream->chan->pathname); | |
780 | if (ret_send_relayd_stream < 0) { | |
d2956687 JG |
781 | pthread_mutex_unlock(&new_stream->lock); |
782 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 783 | consumer_stream_free(new_stream); |
c5c7998f | 784 | goto error_add_stream_nosignal; |
e1b71bdc | 785 | } |
001b7e62 MD |
786 | |
787 | /* | |
788 | * If adding an extra stream to an already | |
789 | * existing channel (e.g. cpu hotplug), we need | |
790 | * to send the "streams_sent" command to relayd. | |
791 | */ | |
792 | if (channel->streams_sent_to_relayd) { | |
0c5b3718 SM |
793 | int ret_send_relayd_streams_sent; |
794 | ||
795 | ret_send_relayd_streams_sent = | |
796 | consumer_send_relayd_streams_sent( | |
797 | new_stream->net_seq_idx); | |
798 | if (ret_send_relayd_streams_sent < 0) { | |
d2956687 JG |
799 | pthread_mutex_unlock(&new_stream->lock); |
800 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 801 | goto error_add_stream_nosignal; |
001b7e62 MD |
802 | } |
803 | } | |
e2039c7a | 804 | } |
d2956687 JG |
805 | pthread_mutex_unlock(&new_stream->lock); |
806 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 807 | |
50f8ae69 | 808 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 809 | if (new_stream->metadata_flag) { |
66d583dc | 810 | consumer_add_metadata_stream(new_stream); |
dae10966 | 811 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 812 | } else { |
66d583dc | 813 | consumer_add_data_stream(new_stream); |
dae10966 | 814 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
815 | } |
816 | ||
66d583dc | 817 | /* Visible to other threads */ |
5ab66908 MD |
818 | new_stream->globally_visible = 1; |
819 | ||
9ce5646a MD |
820 | health_code_update(); |
821 | ||
0c5b3718 SM |
822 | ret_pipe_write = lttng_pipe_write( |
823 | stream_pipe, &new_stream, sizeof(new_stream)); | |
824 | if (ret_pipe_write < 0) { | |
dae10966 | 825 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 826 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 827 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
828 | if (new_stream->metadata_flag) { |
829 | consumer_del_stream_for_metadata(new_stream); | |
830 | } else { | |
831 | consumer_del_stream_for_data(new_stream); | |
832 | } | |
c5c7998f | 833 | goto error_add_stream_nosignal; |
3bd1e081 | 834 | } |
00e2e675 | 835 | |
02d02e31 JD |
836 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
837 | new_stream->name, fd, new_stream->chan->pathname, new_stream->relayd_stream_id); | |
c5c7998f | 838 | end_add_stream: |
3bd1e081 | 839 | break; |
c5c7998f JG |
840 | error_add_stream_nosignal: |
841 | goto end_nosignal; | |
842 | error_add_stream_fatal: | |
843 | goto error_fatal; | |
3bd1e081 | 844 | } |
a4baae1b JD |
845 | case LTTNG_CONSUMER_STREAMS_SENT: |
846 | { | |
847 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 848 | int ret_send_status; |
a4baae1b JD |
849 | |
850 | /* | |
851 | * Get stream's channel reference. Needed when adding the stream to the | |
852 | * global hash table. | |
853 | */ | |
854 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
855 | if (!channel) { | |
856 | /* | |
857 | * We could not find the channel. Can happen if cpu hotplug | |
858 | * happens while tearing down. | |
859 | */ | |
860 | ERR("Unable to find channel key %" PRIu64, | |
861 | msg.u.sent_streams.channel_key); | |
e462382a | 862 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
863 | } |
864 | ||
865 | health_code_update(); | |
866 | ||
867 | /* | |
868 | * Send status code to session daemon. | |
869 | */ | |
0c5b3718 SM |
870 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
871 | if (ret_send_status < 0 || | |
872 | ret_code != LTTCOMM_CONSUMERD_SUCCESS) { | |
a4baae1b | 873 | /* Somehow, the session daemon is not responding anymore. */ |
80d5a658 | 874 | goto error_streams_sent_nosignal; |
a4baae1b JD |
875 | } |
876 | ||
877 | health_code_update(); | |
878 | ||
879 | /* | |
880 | * We should not send this message if we don't monitor the | |
881 | * streams in this channel. | |
882 | */ | |
883 | if (!channel->monitor) { | |
80d5a658 | 884 | goto end_error_streams_sent; |
a4baae1b JD |
885 | } |
886 | ||
887 | health_code_update(); | |
888 | /* Send stream to relayd if the stream has an ID. */ | |
889 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
890 | int ret_send_relay_streams; |
891 | ||
892 | ret_send_relay_streams = consumer_send_relayd_streams_sent( | |
a4baae1b | 893 | msg.u.sent_streams.net_seq_idx); |
0c5b3718 | 894 | if (ret_send_relay_streams < 0) { |
80d5a658 | 895 | goto error_streams_sent_nosignal; |
a4baae1b | 896 | } |
001b7e62 | 897 | channel->streams_sent_to_relayd = true; |
a4baae1b | 898 | } |
80d5a658 | 899 | end_error_streams_sent: |
a4baae1b | 900 | break; |
80d5a658 JG |
901 | error_streams_sent_nosignal: |
902 | goto end_nosignal; | |
a4baae1b | 903 | } |
3bd1e081 MD |
904 | case LTTNG_CONSUMER_UPDATE_STREAM: |
905 | { | |
3f8e211f DG |
906 | rcu_read_unlock(); |
907 | return -ENOSYS; | |
908 | } | |
909 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
910 | { | |
a6ba4fe1 | 911 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f | 912 | struct consumer_relayd_sock_pair *relayd; |
0c5b3718 | 913 | int ret_send_status; |
3f8e211f | 914 | |
a6ba4fe1 | 915 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
916 | |
917 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 918 | relayd = consumer_find_relayd(index); |
3f8e211f | 919 | if (relayd == NULL) { |
3448e266 | 920 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 921 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 922 | } |
3f8e211f | 923 | |
a6ba4fe1 DG |
924 | /* |
925 | * Each relayd socket pair has a refcount of stream attached to it | |
926 | * which tells if the relayd is still active or not depending on the | |
927 | * refcount value. | |
928 | * | |
929 | * This will set the destroy flag of the relayd object and destroy it | |
930 | * if the refcount reaches zero when called. | |
931 | * | |
932 | * The destroy can happen either here or when a stream fd hangs up. | |
933 | */ | |
f50f23d9 DG |
934 | if (relayd) { |
935 | consumer_flag_relayd_for_destroy(relayd); | |
936 | } | |
937 | ||
9ce5646a MD |
938 | health_code_update(); |
939 | ||
0c5b3718 SM |
940 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
941 | if (ret_send_status < 0) { | |
f50f23d9 | 942 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 943 | goto error_fatal; |
f50f23d9 | 944 | } |
3f8e211f | 945 | |
3f8e211f | 946 | goto end_nosignal; |
3bd1e081 | 947 | } |
6d805429 | 948 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 949 | { |
0c5b3718 | 950 | int32_t ret_data_pending; |
6d805429 | 951 | uint64_t id = msg.u.data_pending.session_id; |
0c5b3718 | 952 | ssize_t ret_send; |
c8f59ee5 | 953 | |
6d805429 | 954 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 955 | |
0c5b3718 | 956 | ret_data_pending = consumer_data_pending(id); |
c8f59ee5 | 957 | |
9ce5646a MD |
958 | health_code_update(); |
959 | ||
c8f59ee5 | 960 | /* Send back returned value to session daemon */ |
0c5b3718 SM |
961 | ret_send = lttcomm_send_unix_sock(sock, &ret_data_pending, |
962 | sizeof(ret_data_pending)); | |
963 | if (ret_send < 0) { | |
6d805429 | 964 | PERROR("send data pending ret code"); |
1803a064 | 965 | goto error_fatal; |
c8f59ee5 | 966 | } |
f50f23d9 DG |
967 | |
968 | /* | |
969 | * No need to send back a status message since the data pending | |
970 | * returned value is the response. | |
971 | */ | |
c8f59ee5 | 972 | break; |
53632229 | 973 | } |
6dc3064a DG |
974 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
975 | { | |
3eb928aa MD |
976 | struct lttng_consumer_channel *channel; |
977 | uint64_t key = msg.u.snapshot_channel.key; | |
0c5b3718 | 978 | int ret_send_status; |
3eb928aa MD |
979 | |
980 | channel = consumer_find_channel(key); | |
981 | if (!channel) { | |
982 | ERR("Channel %" PRIu64 " not found", key); | |
983 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 984 | } else { |
3eb928aa | 985 | if (msg.u.snapshot_channel.metadata == 1) { |
0c5b3718 SM |
986 | int ret_snapshot; |
987 | ||
988 | ret_snapshot = lttng_kconsumer_snapshot_metadata( | |
989 | channel, key, | |
3eb928aa | 990 | msg.u.snapshot_channel.pathname, |
0c5b3718 SM |
991 | msg.u.snapshot_channel.relayd_id, |
992 | ctx); | |
993 | if (ret_snapshot < 0) { | |
3eb928aa MD |
994 | ERR("Snapshot metadata failed"); |
995 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
996 | } | |
997 | } else { | |
0c5b3718 SM |
998 | int ret_snapshot; |
999 | ||
1000 | ret_snapshot = lttng_kconsumer_snapshot_channel( | |
1001 | channel, key, | |
3eb928aa MD |
1002 | msg.u.snapshot_channel.pathname, |
1003 | msg.u.snapshot_channel.relayd_id, | |
0c5b3718 SM |
1004 | msg.u.snapshot_channel |
1005 | .nb_packets_per_stream, | |
3eb928aa | 1006 | ctx); |
0c5b3718 | 1007 | if (ret_snapshot < 0) { |
3eb928aa MD |
1008 | ERR("Snapshot channel failed"); |
1009 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
1010 | } | |
07b86b52 JD |
1011 | } |
1012 | } | |
9ce5646a MD |
1013 | health_code_update(); |
1014 | ||
0c5b3718 SM |
1015 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1016 | if (ret_send_status < 0) { | |
6dc3064a DG |
1017 | /* Somehow, the session daemon is not responding anymore. */ |
1018 | goto end_nosignal; | |
1019 | } | |
1020 | break; | |
1021 | } | |
07b86b52 JD |
1022 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
1023 | { | |
1024 | uint64_t key = msg.u.destroy_channel.key; | |
1025 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 1026 | int ret_send_status; |
07b86b52 JD |
1027 | |
1028 | channel = consumer_find_channel(key); | |
1029 | if (!channel) { | |
1030 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 1031 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
1032 | } |
1033 | ||
9ce5646a MD |
1034 | health_code_update(); |
1035 | ||
0c5b3718 SM |
1036 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1037 | if (ret_send_status < 0) { | |
07b86b52 | 1038 | /* Somehow, the session daemon is not responding anymore. */ |
a9d36096 | 1039 | goto end_destroy_channel; |
07b86b52 JD |
1040 | } |
1041 | ||
9ce5646a MD |
1042 | health_code_update(); |
1043 | ||
15dc512a DG |
1044 | /* Stop right now if no channel was found. */ |
1045 | if (!channel) { | |
a9d36096 | 1046 | goto end_destroy_channel; |
15dc512a DG |
1047 | } |
1048 | ||
07b86b52 JD |
1049 | /* |
1050 | * This command should ONLY be issued for channel with streams set in | |
1051 | * no monitor mode. | |
1052 | */ | |
1053 | assert(!channel->monitor); | |
1054 | ||
1055 | /* | |
1056 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1057 | * monitor mode. | |
1058 | */ | |
1059 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
1060 | ||
1061 | consumer_del_channel(channel); | |
a9d36096 | 1062 | end_destroy_channel: |
07b86b52 JD |
1063 | goto end_nosignal; |
1064 | } | |
fb83fe64 JD |
1065 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1066 | { | |
66ab32be JD |
1067 | ssize_t ret; |
1068 | uint64_t count; | |
fb83fe64 JD |
1069 | struct lttng_consumer_channel *channel; |
1070 | uint64_t id = msg.u.discarded_events.session_id; | |
1071 | uint64_t key = msg.u.discarded_events.channel_key; | |
1072 | ||
e5742757 MD |
1073 | DBG("Kernel consumer discarded events command for session id %" |
1074 | PRIu64 ", channel key %" PRIu64, id, key); | |
1075 | ||
fb83fe64 JD |
1076 | channel = consumer_find_channel(key); |
1077 | if (!channel) { | |
1078 | ERR("Kernel consumer discarded events channel %" | |
1079 | PRIu64 " not found", key); | |
66ab32be | 1080 | count = 0; |
e5742757 | 1081 | } else { |
66ab32be | 1082 | count = channel->discarded_events; |
fb83fe64 JD |
1083 | } |
1084 | ||
fb83fe64 JD |
1085 | health_code_update(); |
1086 | ||
1087 | /* Send back returned value to session daemon */ | |
66ab32be | 1088 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1089 | if (ret < 0) { |
1090 | PERROR("send discarded events"); | |
1091 | goto error_fatal; | |
1092 | } | |
1093 | ||
1094 | break; | |
1095 | } | |
1096 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1097 | { | |
66ab32be JD |
1098 | ssize_t ret; |
1099 | uint64_t count; | |
fb83fe64 JD |
1100 | struct lttng_consumer_channel *channel; |
1101 | uint64_t id = msg.u.lost_packets.session_id; | |
1102 | uint64_t key = msg.u.lost_packets.channel_key; | |
1103 | ||
e5742757 MD |
1104 | DBG("Kernel consumer lost packets command for session id %" |
1105 | PRIu64 ", channel key %" PRIu64, id, key); | |
1106 | ||
fb83fe64 JD |
1107 | channel = consumer_find_channel(key); |
1108 | if (!channel) { | |
1109 | ERR("Kernel consumer lost packets channel %" | |
1110 | PRIu64 " not found", key); | |
66ab32be | 1111 | count = 0; |
e5742757 | 1112 | } else { |
66ab32be | 1113 | count = channel->lost_packets; |
fb83fe64 JD |
1114 | } |
1115 | ||
fb83fe64 JD |
1116 | health_code_update(); |
1117 | ||
1118 | /* Send back returned value to session daemon */ | |
66ab32be | 1119 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1120 | if (ret < 0) { |
1121 | PERROR("send lost packets"); | |
1122 | goto error_fatal; | |
1123 | } | |
1124 | ||
1125 | break; | |
1126 | } | |
b3530820 JG |
1127 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1128 | { | |
1129 | int channel_monitor_pipe; | |
0c5b3718 SM |
1130 | int ret_send_status, ret_set_channel_monitor_pipe; |
1131 | ssize_t ret_recv; | |
b3530820 JG |
1132 | |
1133 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1134 | /* Successfully received the command's type. */ | |
0c5b3718 SM |
1135 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1136 | if (ret_send_status < 0) { | |
b3530820 JG |
1137 | goto error_fatal; |
1138 | } | |
1139 | ||
0c5b3718 SM |
1140 | ret_recv = lttcomm_recv_fds_unix_sock( |
1141 | sock, &channel_monitor_pipe, 1); | |
1142 | if (ret_recv != sizeof(channel_monitor_pipe)) { | |
b3530820 JG |
1143 | ERR("Failed to receive channel monitor pipe"); |
1144 | goto error_fatal; | |
1145 | } | |
1146 | ||
1147 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
0c5b3718 SM |
1148 | ret_set_channel_monitor_pipe = |
1149 | consumer_timer_thread_set_channel_monitor_pipe( | |
1150 | channel_monitor_pipe); | |
1151 | if (!ret_set_channel_monitor_pipe) { | |
b3530820 | 1152 | int flags; |
0c5b3718 | 1153 | int ret_fcntl; |
b3530820 JG |
1154 | |
1155 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1156 | /* Set the pipe as non-blocking. */ | |
0c5b3718 SM |
1157 | ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); |
1158 | if (ret_fcntl == -1) { | |
b3530820 JG |
1159 | PERROR("fcntl get flags of the channel monitoring pipe"); |
1160 | goto error_fatal; | |
1161 | } | |
0c5b3718 | 1162 | flags = ret_fcntl; |
b3530820 | 1163 | |
0c5b3718 | 1164 | ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, |
b3530820 | 1165 | flags | O_NONBLOCK); |
0c5b3718 | 1166 | if (ret_fcntl == -1) { |
b3530820 JG |
1167 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); |
1168 | goto error_fatal; | |
1169 | } | |
1170 | DBG("Channel monitor pipe set as non-blocking"); | |
1171 | } else { | |
1172 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1173 | } | |
0c5b3718 SM |
1174 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1175 | if (ret_send_status < 0) { | |
b3530820 JG |
1176 | goto error_fatal; |
1177 | } | |
1178 | break; | |
1179 | } | |
b99a8d42 JD |
1180 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1181 | { | |
92b7a7f8 MD |
1182 | struct lttng_consumer_channel *channel; |
1183 | uint64_t key = msg.u.rotate_channel.key; | |
0c5b3718 | 1184 | int ret_send_status; |
b99a8d42 | 1185 | |
92b7a7f8 | 1186 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1187 | |
92b7a7f8 MD |
1188 | channel = consumer_find_channel(key); |
1189 | if (!channel) { | |
1190 | ERR("Channel %" PRIu64 " not found", key); | |
1191 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1192 | } else { | |
1193 | /* | |
1194 | * Sample the rotate position of all the streams in this channel. | |
1195 | */ | |
0c5b3718 SM |
1196 | int ret_rotate_channel; |
1197 | ||
1198 | ret_rotate_channel = lttng_consumer_rotate_channel( | |
1199 | channel, key, | |
92b7a7f8 | 1200 | msg.u.rotate_channel.relayd_id, |
0c5b3718 SM |
1201 | msg.u.rotate_channel.metadata, ctx); |
1202 | if (ret_rotate_channel < 0) { | |
92b7a7f8 MD |
1203 | ERR("Rotate channel failed"); |
1204 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1205 | } | |
b99a8d42 | 1206 | |
92b7a7f8 MD |
1207 | health_code_update(); |
1208 | } | |
0c5b3718 SM |
1209 | |
1210 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1211 | if (ret_send_status < 0) { | |
b99a8d42 | 1212 | /* Somehow, the session daemon is not responding anymore. */ |
713bdd26 | 1213 | goto error_rotate_channel; |
b99a8d42 | 1214 | } |
92b7a7f8 MD |
1215 | if (channel) { |
1216 | /* Rotate the streams that are ready right now. */ | |
0c5b3718 SM |
1217 | int ret_rotate; |
1218 | ||
1219 | ret_rotate = lttng_consumer_rotate_ready_streams( | |
92b7a7f8 | 1220 | channel, key, ctx); |
0c5b3718 | 1221 | if (ret_rotate < 0) { |
92b7a7f8 MD |
1222 | ERR("Rotate ready streams failed"); |
1223 | } | |
b99a8d42 | 1224 | } |
b99a8d42 | 1225 | break; |
713bdd26 JG |
1226 | error_rotate_channel: |
1227 | goto end_nosignal; | |
b99a8d42 | 1228 | } |
5f3aff8b MD |
1229 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
1230 | { | |
1231 | struct lttng_consumer_channel *channel; | |
1232 | uint64_t key = msg.u.clear_channel.key; | |
0c5b3718 | 1233 | int ret_send_status; |
5f3aff8b MD |
1234 | |
1235 | channel = consumer_find_channel(key); | |
1236 | if (!channel) { | |
1237 | DBG("Channel %" PRIu64 " not found", key); | |
1238 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1239 | } else { | |
0c5b3718 SM |
1240 | int ret_clear_channel; |
1241 | ||
1242 | ret_clear_channel = | |
1243 | lttng_consumer_clear_channel(channel); | |
1244 | if (ret_clear_channel) { | |
5f3aff8b | 1245 | ERR("Clear channel failed"); |
0c5b3718 | 1246 | ret_code = ret_clear_channel; |
5f3aff8b MD |
1247 | } |
1248 | ||
1249 | health_code_update(); | |
1250 | } | |
0c5b3718 SM |
1251 | |
1252 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1253 | if (ret_send_status < 0) { | |
5f3aff8b MD |
1254 | /* Somehow, the session daemon is not responding anymore. */ |
1255 | goto end_nosignal; | |
1256 | } | |
1257 | ||
1258 | break; | |
1259 | } | |
d2956687 | 1260 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1261 | { |
0c5b3718 SM |
1262 | int ret_send_status; |
1263 | ||
d2956687 JG |
1264 | ret_code = lttng_consumer_init_command(ctx, |
1265 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1266 | health_code_update(); |
0c5b3718 SM |
1267 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1268 | if (ret_send_status < 0) { | |
00fb02ac JD |
1269 | /* Somehow, the session daemon is not responding anymore. */ |
1270 | goto end_nosignal; | |
1271 | } | |
1272 | break; | |
1273 | } | |
d2956687 | 1274 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1275 | { |
d2956687 | 1276 | const struct lttng_credentials credentials = { |
ff588497 JR |
1277 | .uid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.uid), |
1278 | .gid = LTTNG_OPTIONAL_INIT_VALUE(msg.u.create_trace_chunk.credentials.value.gid), | |
d2956687 JG |
1279 | }; |
1280 | const bool is_local_trace = | |
1281 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1282 | const uint64_t relayd_id = | |
1283 | msg.u.create_trace_chunk.relayd_id.value; | |
1284 | const char *chunk_override_name = | |
1285 | *msg.u.create_trace_chunk.override_name ? | |
1286 | msg.u.create_trace_chunk.override_name : | |
1287 | NULL; | |
cbf53d23 | 1288 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
d88744a4 | 1289 | |
d2956687 JG |
1290 | /* |
1291 | * The session daemon will only provide a chunk directory file | |
1292 | * descriptor for local traces. | |
1293 | */ | |
1294 | if (is_local_trace) { | |
1295 | int chunk_dirfd; | |
0c5b3718 SM |
1296 | int ret_send_status; |
1297 | ssize_t ret_recv; | |
19990ed5 | 1298 | |
d2956687 | 1299 | /* Acnowledge the reception of the command. */ |
0c5b3718 SM |
1300 | ret_send_status = consumer_send_status_msg( |
1301 | sock, LTTCOMM_CONSUMERD_SUCCESS); | |
1302 | if (ret_send_status < 0) { | |
d2956687 JG |
1303 | /* Somehow, the session daemon is not responding anymore. */ |
1304 | goto end_nosignal; | |
1305 | } | |
92816cc3 | 1306 | |
0c5b3718 SM |
1307 | ret_recv = lttcomm_recv_fds_unix_sock( |
1308 | sock, &chunk_dirfd, 1); | |
1309 | if (ret_recv != sizeof(chunk_dirfd)) { | |
d2956687 JG |
1310 | ERR("Failed to receive trace chunk directory file descriptor"); |
1311 | goto error_fatal; | |
1312 | } | |
92816cc3 | 1313 | |
d2956687 JG |
1314 | DBG("Received trace chunk directory fd (%d)", |
1315 | chunk_dirfd); | |
cbf53d23 | 1316 | chunk_directory_handle = lttng_directory_handle_create_from_dirfd( |
d2956687 | 1317 | chunk_dirfd); |
cbf53d23 | 1318 | if (!chunk_directory_handle) { |
d2956687 JG |
1319 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); |
1320 | if (close(chunk_dirfd)) { | |
1321 | PERROR("Failed to close chunk directory file descriptor"); | |
1322 | } | |
1323 | goto error_fatal; | |
1324 | } | |
92816cc3 JG |
1325 | } |
1326 | ||
d2956687 JG |
1327 | ret_code = lttng_consumer_create_trace_chunk( |
1328 | !is_local_trace ? &relayd_id : NULL, | |
1329 | msg.u.create_trace_chunk.session_id, | |
1330 | msg.u.create_trace_chunk.chunk_id, | |
e5add6d0 JG |
1331 | (time_t) msg.u.create_trace_chunk |
1332 | .creation_timestamp, | |
d2956687 | 1333 | chunk_override_name, |
e5add6d0 JG |
1334 | msg.u.create_trace_chunk.credentials.is_set ? |
1335 | &credentials : | |
1336 | NULL, | |
cbf53d23 JG |
1337 | chunk_directory_handle); |
1338 | lttng_directory_handle_put(chunk_directory_handle); | |
d2956687 | 1339 | goto end_msg_sessiond; |
d88744a4 | 1340 | } |
d2956687 | 1341 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1342 | { |
bbc4768c JG |
1343 | enum lttng_trace_chunk_command_type close_command = |
1344 | msg.u.close_trace_chunk.close_command.value; | |
d2956687 JG |
1345 | const uint64_t relayd_id = |
1346 | msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f MD |
1347 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1348 | char path[LTTNG_PATH_MAX]; | |
0c5b3718 | 1349 | ssize_t ret_send; |
d2956687 JG |
1350 | |
1351 | ret_code = lttng_consumer_close_trace_chunk( | |
1352 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
bbc4768c JG |
1353 | &relayd_id : |
1354 | NULL, | |
d2956687 JG |
1355 | msg.u.close_trace_chunk.session_id, |
1356 | msg.u.close_trace_chunk.chunk_id, | |
bbc4768c JG |
1357 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1358 | msg.u.close_trace_chunk.close_command.is_set ? | |
1359 | &close_command : | |
ecd1a12f MD |
1360 | NULL, path); |
1361 | reply.ret_code = ret_code; | |
1362 | reply.path_length = strlen(path) + 1; | |
0c5b3718 SM |
1363 | ret_send = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
1364 | if (ret_send != sizeof(reply)) { | |
ecd1a12f MD |
1365 | goto error_fatal; |
1366 | } | |
0c5b3718 SM |
1367 | ret_send = lttcomm_send_unix_sock( |
1368 | sock, path, reply.path_length); | |
1369 | if (ret_send != reply.path_length) { | |
ecd1a12f MD |
1370 | goto error_fatal; |
1371 | } | |
1372 | goto end_nosignal; | |
3654ed19 | 1373 | } |
d2956687 | 1374 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 1375 | { |
d2956687 JG |
1376 | const uint64_t relayd_id = |
1377 | msg.u.trace_chunk_exists.relayd_id.value; | |
1378 | ||
1379 | ret_code = lttng_consumer_trace_chunk_exists( | |
1380 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1381 | &relayd_id : NULL, | |
1382 | msg.u.trace_chunk_exists.session_id, | |
1383 | msg.u.trace_chunk_exists.chunk_id); | |
1384 | goto end_msg_sessiond; | |
a1ae2ea5 | 1385 | } |
04ed9e10 JG |
1386 | case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: |
1387 | { | |
1388 | const uint64_t key = msg.u.open_channel_packets.key; | |
1389 | struct lttng_consumer_channel *channel = | |
1390 | consumer_find_channel(key); | |
1391 | ||
1392 | if (channel) { | |
1393 | pthread_mutex_lock(&channel->lock); | |
1394 | ret_code = lttng_consumer_open_channel_packets(channel); | |
1395 | pthread_mutex_unlock(&channel->lock); | |
1396 | } else { | |
1397 | WARN("Channel %" PRIu64 " not found", key); | |
1398 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1399 | } | |
1400 | ||
1401 | health_code_update(); | |
1402 | goto end_msg_sessiond; | |
1403 | } | |
3bd1e081 | 1404 | default: |
3f8e211f | 1405 | goto end_nosignal; |
3bd1e081 | 1406 | } |
3f8e211f | 1407 | |
3bd1e081 | 1408 | end_nosignal: |
4cbc1a04 DG |
1409 | /* |
1410 | * Return 1 to indicate success since the 0 value can be a socket | |
1411 | * shutdown during the recv() or send() call. | |
1412 | */ | |
0c5b3718 | 1413 | ret_func = 1; |
c5c7998f JG |
1414 | goto end; |
1415 | error_fatal: | |
1416 | /* This will issue a consumer stop. */ | |
0c5b3718 | 1417 | ret_func = -1; |
c5c7998f | 1418 | goto end; |
d2956687 JG |
1419 | end_msg_sessiond: |
1420 | /* | |
1421 | * The returned value here is not useful since either way we'll return 1 to | |
1422 | * the caller because the session daemon socket management is done | |
1423 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1424 | */ | |
0c5b3718 SM |
1425 | { |
1426 | int ret_send_status; | |
1427 | ||
1428 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1429 | if (ret_send_status < 0) { | |
1430 | goto error_fatal; | |
1431 | } | |
d2956687 | 1432 | } |
0c5b3718 SM |
1433 | |
1434 | ret_func = 1; | |
1435 | ||
c5c7998f | 1436 | end: |
d2956687 | 1437 | health_code_update(); |
1803a064 | 1438 | rcu_read_unlock(); |
0c5b3718 | 1439 | return ret_func; |
3bd1e081 | 1440 | } |
d41f73b7 | 1441 | |
94d49140 JD |
1442 | /* |
1443 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1444 | * metadata thread can consumer them. | |
1445 | * | |
1446 | * Metadata stream lock MUST be acquired. | |
94d49140 | 1447 | */ |
577eea73 JG |
1448 | enum sync_metadata_status lttng_kconsumer_sync_metadata( |
1449 | struct lttng_consumer_stream *metadata) | |
94d49140 JD |
1450 | { |
1451 | int ret; | |
577eea73 | 1452 | enum sync_metadata_status status; |
94d49140 JD |
1453 | |
1454 | assert(metadata); | |
1455 | ||
1456 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1457 | if (ret < 0) { | |
1458 | ERR("Failed to flush kernel stream"); | |
577eea73 | 1459 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
1460 | goto end; |
1461 | } | |
1462 | ||
1463 | ret = kernctl_snapshot(metadata->wait_fd); | |
1464 | if (ret < 0) { | |
577eea73 JG |
1465 | if (errno == EAGAIN) { |
1466 | /* No new metadata, exit. */ | |
1467 | DBG("Sync metadata, no new kernel metadata"); | |
1468 | status = SYNC_METADATA_STATUS_NO_DATA; | |
1469 | } else { | |
94d49140 | 1470 | ERR("Sync metadata, taking kernel snapshot failed."); |
577eea73 | 1471 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 | 1472 | } |
577eea73 JG |
1473 | } else { |
1474 | status = SYNC_METADATA_STATUS_NEW_DATA; | |
94d49140 JD |
1475 | } |
1476 | ||
1477 | end: | |
577eea73 | 1478 | return status; |
94d49140 | 1479 | } |
309167d2 | 1480 | |
fb83fe64 | 1481 | static |
6f9449c2 JG |
1482 | int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1483 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1484 | { |
1485 | int ret; | |
fb83fe64 | 1486 | |
6f9449c2 JG |
1487 | ret = kernctl_get_subbuf_size( |
1488 | stream->wait_fd, &subbuf->info.data.subbuf_size); | |
1489 | if (ret) { | |
fb83fe64 JD |
1490 | goto end; |
1491 | } | |
fb83fe64 | 1492 | |
6f9449c2 JG |
1493 | ret = kernctl_get_padded_subbuf_size( |
1494 | stream->wait_fd, &subbuf->info.data.padded_subbuf_size); | |
1495 | if (ret) { | |
fb83fe64 JD |
1496 | goto end; |
1497 | } | |
fb83fe64 JD |
1498 | |
1499 | end: | |
1500 | return ret; | |
1501 | } | |
1502 | ||
93ec662e | 1503 | static |
6f9449c2 JG |
1504 | int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1505 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1506 | { |
1507 | int ret; | |
93ec662e | 1508 | |
6f9449c2 JG |
1509 | ret = extract_common_subbuffer_info(stream, subbuf); |
1510 | if (ret) { | |
93ec662e JD |
1511 | goto end; |
1512 | } | |
1513 | ||
6f9449c2 JG |
1514 | ret = kernctl_get_metadata_version( |
1515 | stream->wait_fd, &subbuf->info.metadata.version); | |
1516 | if (ret) { | |
93ec662e JD |
1517 | goto end; |
1518 | } | |
1519 | ||
93ec662e JD |
1520 | end: |
1521 | return ret; | |
1522 | } | |
1523 | ||
6f9449c2 JG |
1524 | static |
1525 | int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, | |
1526 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1527 | { |
6f9449c2 | 1528 | int ret; |
d41f73b7 | 1529 | |
6f9449c2 JG |
1530 | ret = extract_common_subbuffer_info(stream, subbuf); |
1531 | if (ret) { | |
1532 | goto end; | |
1533 | } | |
309167d2 | 1534 | |
6f9449c2 JG |
1535 | ret = kernctl_get_packet_size( |
1536 | stream->wait_fd, &subbuf->info.data.packet_size); | |
1537 | if (ret < 0) { | |
1538 | PERROR("Failed to get sub-buffer packet size"); | |
1539 | goto end; | |
1540 | } | |
02d02e31 | 1541 | |
6f9449c2 JG |
1542 | ret = kernctl_get_content_size( |
1543 | stream->wait_fd, &subbuf->info.data.content_size); | |
1544 | if (ret < 0) { | |
1545 | PERROR("Failed to get sub-buffer content size"); | |
1546 | goto end; | |
d41f73b7 MD |
1547 | } |
1548 | ||
6f9449c2 JG |
1549 | ret = kernctl_get_timestamp_begin( |
1550 | stream->wait_fd, &subbuf->info.data.timestamp_begin); | |
1551 | if (ret < 0) { | |
1552 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1553 | goto end; | |
1d4dfdef DG |
1554 | } |
1555 | ||
6f9449c2 JG |
1556 | ret = kernctl_get_timestamp_end( |
1557 | stream->wait_fd, &subbuf->info.data.timestamp_end); | |
1558 | if (ret < 0) { | |
1559 | PERROR("Failed to get sub-buffer end timestamp"); | |
1560 | goto end; | |
1561 | } | |
1562 | ||
1563 | ret = kernctl_get_events_discarded( | |
1564 | stream->wait_fd, &subbuf->info.data.events_discarded); | |
1565 | if (ret) { | |
1566 | PERROR("Failed to get sub-buffer events discarded count"); | |
1567 | goto end; | |
1568 | } | |
1569 | ||
1570 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
1571 | &subbuf->info.data.sequence_number.value); | |
1572 | if (ret) { | |
1573 | /* May not be supported by older LTTng-modules. */ | |
1574 | if (ret != -ENOTTY) { | |
1575 | PERROR("Failed to get sub-buffer sequence number"); | |
1576 | goto end; | |
fb83fe64 | 1577 | } |
1c20f0e2 | 1578 | } else { |
6f9449c2 | 1579 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1580 | } |
1581 | ||
6f9449c2 JG |
1582 | ret = kernctl_get_stream_id( |
1583 | stream->wait_fd, &subbuf->info.data.stream_id); | |
1584 | if (ret < 0) { | |
1585 | PERROR("Failed to get stream id"); | |
1586 | goto end; | |
1587 | } | |
1d4dfdef | 1588 | |
6f9449c2 JG |
1589 | ret = kernctl_get_instance_id(stream->wait_fd, |
1590 | &subbuf->info.data.stream_instance_id.value); | |
1591 | if (ret) { | |
1592 | /* May not be supported by older LTTng-modules. */ | |
1593 | if (ret != -ENOTTY) { | |
1594 | PERROR("Failed to get stream instance id"); | |
1595 | goto end; | |
1d4dfdef | 1596 | } |
6f9449c2 JG |
1597 | } else { |
1598 | subbuf->info.data.stream_instance_id.is_set = true; | |
1599 | } | |
1600 | end: | |
1601 | return ret; | |
1602 | } | |
47e81c02 | 1603 | |
6f9449c2 | 1604 | static |
823a3926 JG |
1605 | enum get_next_subbuffer_status get_subbuffer_common( |
1606 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1607 | struct stream_subbuffer *subbuffer) |
1608 | { | |
1609 | int ret; | |
823a3926 | 1610 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1611 | |
1612 | ret = kernctl_get_next_subbuf(stream->wait_fd); | |
823a3926 JG |
1613 | switch (ret) { |
1614 | case 0: | |
1615 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1616 | break; | |
1617 | case -ENODATA: | |
1618 | case -EAGAIN: | |
684c6783 MD |
1619 | /* |
1620 | * The caller only expects -ENODATA when there is no data to | |
1621 | * read, but the kernel tracer returns -EAGAIN when there is | |
1622 | * currently no data for a non-finalized stream, and -ENODATA | |
1623 | * when there is no data for a finalized stream. Those can be | |
1624 | * combined into a -ENODATA return value. | |
1625 | */ | |
823a3926 JG |
1626 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; |
1627 | goto end; | |
1628 | default: | |
1629 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
6f9449c2 JG |
1630 | goto end; |
1631 | } | |
1632 | ||
1633 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
823a3926 JG |
1634 | stream, subbuffer); |
1635 | if (ret) { | |
1636 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1637 | } | |
6f9449c2 | 1638 | end: |
823a3926 | 1639 | return status; |
6f9449c2 | 1640 | } |
128708c3 | 1641 | |
6f9449c2 | 1642 | static |
823a3926 JG |
1643 | enum get_next_subbuffer_status get_next_subbuffer_splice( |
1644 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1645 | struct stream_subbuffer *subbuffer) |
1646 | { | |
823a3926 JG |
1647 | const enum get_next_subbuffer_status status = |
1648 | get_subbuffer_common(stream, subbuffer); | |
1d4dfdef | 1649 | |
823a3926 | 1650 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { |
6f9449c2 JG |
1651 | goto end; |
1652 | } | |
1d4dfdef | 1653 | |
6f9449c2 JG |
1654 | subbuffer->buffer.fd = stream->wait_fd; |
1655 | end: | |
823a3926 | 1656 | return status; |
6f9449c2 | 1657 | } |
fd424d99 | 1658 | |
6f9449c2 | 1659 | static |
823a3926 JG |
1660 | enum get_next_subbuffer_status get_next_subbuffer_mmap( |
1661 | struct lttng_consumer_stream *stream, | |
6f9449c2 JG |
1662 | struct stream_subbuffer *subbuffer) |
1663 | { | |
1664 | int ret; | |
823a3926 | 1665 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1666 | const char *addr; |
1667 | ||
823a3926 JG |
1668 | status = get_subbuffer_common(stream, subbuffer); |
1669 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { | |
6f9449c2 | 1670 | goto end; |
128708c3 | 1671 | } |
6f9449c2 JG |
1672 | |
1673 | ret = get_current_subbuf_addr(stream, &addr); | |
1674 | if (ret) { | |
823a3926 | 1675 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
6f9449c2 | 1676 | goto end; |
d41f73b7 | 1677 | } |
6f9449c2 JG |
1678 | |
1679 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1680 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1681 | end: | |
823a3926 | 1682 | return status; |
6f9449c2 JG |
1683 | } |
1684 | ||
f5ba75b4 | 1685 | static |
823a3926 | 1686 | enum get_next_subbuffer_status get_next_subbuffer_metadata_check(struct lttng_consumer_stream *stream, |
f5ba75b4 JG |
1687 | struct stream_subbuffer *subbuffer) |
1688 | { | |
1689 | int ret; | |
1690 | const char *addr; | |
1691 | bool coherent; | |
823a3926 | 1692 | enum get_next_subbuffer_status status; |
f5ba75b4 JG |
1693 | |
1694 | ret = kernctl_get_next_subbuf_metadata_check(stream->wait_fd, | |
1695 | &coherent); | |
1696 | if (ret) { | |
1697 | goto end; | |
1698 | } | |
1699 | ||
1700 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( | |
1701 | stream, subbuffer); | |
1702 | if (ret) { | |
1703 | goto end; | |
1704 | } | |
1705 | ||
1706 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
1707 | ||
1708 | ret = get_current_subbuf_addr(stream, &addr); | |
1709 | if (ret) { | |
1710 | goto end; | |
1711 | } | |
1712 | ||
1713 | subbuffer->buffer.buffer = lttng_buffer_view_init( | |
1714 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1715 | DBG("Got metadata packet with padded_subbuf_size = %lu, coherent = %s", | |
1716 | subbuffer->info.metadata.padded_subbuf_size, | |
1717 | coherent ? "true" : "false"); | |
1718 | end: | |
684c6783 MD |
1719 | /* |
1720 | * The caller only expects -ENODATA when there is no data to read, but | |
1721 | * the kernel tracer returns -EAGAIN when there is currently no data | |
1722 | * for a non-finalized stream, and -ENODATA when there is no data for a | |
1723 | * finalized stream. Those can be combined into a -ENODATA return value. | |
1724 | */ | |
823a3926 JG |
1725 | switch (ret) { |
1726 | case 0: | |
1727 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1728 | break; | |
1729 | case -ENODATA: | |
1730 | case -EAGAIN: | |
1731 | /* | |
1732 | * The caller only expects -ENODATA when there is no data to | |
1733 | * read, but the kernel tracer returns -EAGAIN when there is | |
1734 | * currently no data for a non-finalized stream, and -ENODATA | |
1735 | * when there is no data for a finalized stream. Those can be | |
1736 | * combined into a -ENODATA return value. | |
1737 | */ | |
1738 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; | |
1739 | break; | |
1740 | default: | |
1741 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1742 | break; | |
684c6783 MD |
1743 | } |
1744 | ||
823a3926 | 1745 | return status; |
f5ba75b4 JG |
1746 | } |
1747 | ||
6f9449c2 JG |
1748 | static |
1749 | int put_next_subbuffer(struct lttng_consumer_stream *stream, | |
1750 | struct stream_subbuffer *subbuffer) | |
1751 | { | |
1752 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1753 | ||
1754 | if (ret) { | |
1755 | if (ret == -EFAULT) { | |
1756 | PERROR("Error in unreserving sub buffer"); | |
1757 | } else if (ret == -EIO) { | |
d41f73b7 | 1758 | /* Should never happen with newer LTTng versions */ |
6f9449c2 | 1759 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); |
d41f73b7 | 1760 | } |
d41f73b7 MD |
1761 | } |
1762 | ||
6f9449c2 JG |
1763 | return ret; |
1764 | } | |
1c20f0e2 | 1765 | |
f5ba75b4 JG |
1766 | static |
1767 | bool is_get_next_check_metadata_available(int tracer_fd) | |
1768 | { | |
0aeedd20 JG |
1769 | const int ret = kernctl_get_next_subbuf_metadata_check(tracer_fd, NULL); |
1770 | const bool available = ret != -ENOTTY; | |
1771 | ||
1772 | if (ret == 0) { | |
1773 | /* get succeeded, make sure to put the subbuffer. */ | |
1774 | kernctl_put_subbuf(tracer_fd); | |
1775 | } | |
1776 | ||
1777 | return available; | |
f5ba75b4 JG |
1778 | } |
1779 | ||
ee0350f8 MD |
1780 | static |
1781 | int signal_metadata(struct lttng_consumer_stream *stream, | |
1782 | struct lttng_consumer_local_data *ctx) | |
1783 | { | |
1784 | ASSERT_LOCKED(stream->metadata_rdv_lock); | |
1785 | return pthread_cond_broadcast(&stream->metadata_rdv) ? -errno : 0; | |
1786 | } | |
1787 | ||
f5ba75b4 JG |
1788 | static |
1789 | int lttng_kconsumer_set_stream_ops( | |
6f9449c2 JG |
1790 | struct lttng_consumer_stream *stream) |
1791 | { | |
f5ba75b4 JG |
1792 | int ret = 0; |
1793 | ||
1794 | if (stream->metadata_flag && stream->chan->is_live) { | |
1795 | DBG("Attempting to enable metadata bucketization for live consumers"); | |
1796 | if (is_get_next_check_metadata_available(stream->wait_fd)) { | |
1797 | DBG("Kernel tracer supports get_next_subbuffer_metadata_check, metadata will be accumulated until a coherent state is reached"); | |
1798 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1799 | get_next_subbuffer_metadata_check; | |
1800 | ret = consumer_stream_enable_metadata_bucketization( | |
1801 | stream); | |
1802 | if (ret) { | |
1803 | goto end; | |
1804 | } | |
1805 | } else { | |
1806 | /* | |
1807 | * The kernel tracer version is too old to indicate | |
1808 | * when the metadata stream has reached a "coherent" | |
1809 | * (parseable) point. | |
1810 | * | |
1811 | * This means that a live viewer may see an incoherent | |
1812 | * sequence of metadata and fail to parse it. | |
1813 | */ | |
1814 | WARN("Kernel tracer does not support get_next_subbuffer_metadata_check which may cause live clients to fail to parse the metadata stream"); | |
1815 | metadata_bucket_destroy(stream->metadata_bucket); | |
1816 | stream->metadata_bucket = NULL; | |
1817 | } | |
ee0350f8 MD |
1818 | |
1819 | stream->read_subbuffer_ops.on_sleep = signal_metadata; | |
f5ba75b4 JG |
1820 | } |
1821 | ||
1822 | if (!stream->read_subbuffer_ops.get_next_subbuffer) { | |
1823 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
1824 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1825 | get_next_subbuffer_mmap; | |
1826 | } else { | |
1827 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1828 | get_next_subbuffer_splice; | |
1829 | } | |
94d49140 JD |
1830 | } |
1831 | ||
6f9449c2 JG |
1832 | if (stream->metadata_flag) { |
1833 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1834 | extract_metadata_subbuffer_info; | |
1835 | } else { | |
1836 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1837 | extract_data_subbuffer_info; | |
1838 | if (stream->chan->is_live) { | |
1839 | stream->read_subbuffer_ops.send_live_beacon = | |
1840 | consumer_flush_kernel_index; | |
1841 | } | |
309167d2 JD |
1842 | } |
1843 | ||
6f9449c2 | 1844 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; |
f5ba75b4 JG |
1845 | end: |
1846 | return ret; | |
d41f73b7 MD |
1847 | } |
1848 | ||
1849 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1850 | { | |
1851 | int ret; | |
ffe60014 DG |
1852 | |
1853 | assert(stream); | |
1854 | ||
2bba9e53 | 1855 | /* |
d2956687 JG |
1856 | * Don't create anything if this is set for streaming or if there is |
1857 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1858 | */ |
d2956687 JG |
1859 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1860 | stream->chan->trace_chunk) { | |
1861 | ret = consumer_stream_create_output_files(stream, true); | |
1862 | if (ret) { | |
fe4477ee JD |
1863 | goto error; |
1864 | } | |
ffe60014 | 1865 | } |
d41f73b7 | 1866 | |
d41f73b7 MD |
1867 | if (stream->output == LTTNG_EVENT_MMAP) { |
1868 | /* get the len of the mmap region */ | |
1869 | unsigned long mmap_len; | |
1870 | ||
1871 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1872 | if (ret != 0) { | |
ffe60014 | 1873 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1874 | goto error_close_fd; |
1875 | } | |
1876 | stream->mmap_len = (size_t) mmap_len; | |
1877 | ||
ffe60014 DG |
1878 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1879 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1880 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1881 | PERROR("Error mmaping"); |
d41f73b7 MD |
1882 | ret = -1; |
1883 | goto error_close_fd; | |
1884 | } | |
1885 | } | |
1886 | ||
f5ba75b4 JG |
1887 | ret = lttng_kconsumer_set_stream_ops(stream); |
1888 | if (ret) { | |
1889 | goto error_close_fd; | |
1890 | } | |
6f9449c2 | 1891 | |
d41f73b7 MD |
1892 | /* we return 0 to let the library handle the FD internally */ |
1893 | return 0; | |
1894 | ||
1895 | error_close_fd: | |
2f225ce2 | 1896 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1897 | int err; |
1898 | ||
1899 | err = close(stream->out_fd); | |
1900 | assert(!err); | |
2f225ce2 | 1901 | stream->out_fd = -1; |
d41f73b7 MD |
1902 | } |
1903 | error: | |
1904 | return ret; | |
1905 | } | |
1906 | ||
ca22feea DG |
1907 | /* |
1908 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1909 | * stream. Consumer data lock MUST be acquired before calling this function |
1910 | * and the stream lock. | |
ca22feea | 1911 | * |
6d805429 | 1912 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1913 | * data is available for trace viewer reading. |
1914 | */ | |
6d805429 | 1915 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1916 | { |
1917 | int ret; | |
1918 | ||
1919 | assert(stream); | |
1920 | ||
873b9e9a MD |
1921 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1922 | ret = 0; | |
1923 | goto end; | |
1924 | } | |
1925 | ||
ca22feea DG |
1926 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1927 | if (ret == 0) { | |
1928 | /* There is still data so let's put back this subbuffer. */ | |
1929 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1930 | assert(ret == 0); | |
6d805429 | 1931 | ret = 1; /* Data is pending */ |
4e9a4686 | 1932 | goto end; |
ca22feea DG |
1933 | } |
1934 | ||
6d805429 DG |
1935 | /* Data is NOT pending and ready to be read. */ |
1936 | ret = 0; | |
ca22feea | 1937 | |
6efae65e DG |
1938 | end: |
1939 | return ret; | |
ca22feea | 1940 | } |