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 | ||
fd424d99 | 10 | #include "common/buffer-view.h" |
128708c3 | 11 | #include <stdint.h> |
6c1c0768 | 12 | #define _LGPL_SOURCE |
3bd1e081 | 13 | #include <assert.h> |
3bd1e081 MD |
14 | #include <poll.h> |
15 | #include <pthread.h> | |
16 | #include <stdlib.h> | |
17 | #include <string.h> | |
18 | #include <sys/mman.h> | |
19 | #include <sys/socket.h> | |
20 | #include <sys/types.h> | |
77c7c900 | 21 | #include <inttypes.h> |
3bd1e081 | 22 | #include <unistd.h> |
dbb5dfe6 | 23 | #include <sys/stat.h> |
3bd1e081 | 24 | |
51a9e1c7 | 25 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 26 | #include <common/common.h> |
10a8a223 | 27 | #include <common/kernel-ctl/kernel-ctl.h> |
10a8a223 | 28 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 29 | #include <common/sessiond-comm/relayd.h> |
dbb5dfe6 | 30 | #include <common/compat/fcntl.h> |
f263b7fd | 31 | #include <common/compat/endian.h> |
acdb9057 | 32 | #include <common/pipe.h> |
00e2e675 | 33 | #include <common/relayd/relayd.h> |
fe4477ee | 34 | #include <common/utils.h> |
c8fea79c | 35 | #include <common/consumer/consumer-stream.h> |
309167d2 | 36 | #include <common/index/index.h> |
c8fea79c | 37 | #include <common/consumer/consumer-timer.h> |
d2956687 | 38 | #include <common/optional.h> |
0857097f | 39 | |
10a8a223 | 40 | #include "kernel-consumer.h" |
3bd1e081 MD |
41 | |
42 | extern struct lttng_consumer_global_data consumer_data; | |
43 | extern int consumer_poll_timeout; | |
3bd1e081 | 44 | |
3bd1e081 MD |
45 | /* |
46 | * Take a snapshot for a specific fd | |
47 | * | |
48 | * Returns 0 on success, < 0 on error | |
49 | */ | |
ffe60014 | 50 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
51 | { |
52 | int ret = 0; | |
53 | int infd = stream->wait_fd; | |
54 | ||
55 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
56 | /* |
57 | * -EAGAIN is not an error, it just means that there is no data to | |
58 | * be read. | |
59 | */ | |
60 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 61 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
62 | } |
63 | ||
64 | return ret; | |
65 | } | |
66 | ||
e9404c27 JG |
67 | /* |
68 | * Sample consumed and produced positions for a specific fd. | |
69 | * | |
70 | * Returns 0 on success, < 0 on error. | |
71 | */ | |
72 | int lttng_kconsumer_sample_snapshot_positions( | |
73 | struct lttng_consumer_stream *stream) | |
74 | { | |
75 | assert(stream); | |
76 | ||
77 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
78 | } | |
79 | ||
3bd1e081 MD |
80 | /* |
81 | * Get the produced position | |
82 | * | |
83 | * Returns 0 on success, < 0 on error | |
84 | */ | |
ffe60014 | 85 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
86 | unsigned long *pos) |
87 | { | |
88 | int ret; | |
89 | int infd = stream->wait_fd; | |
90 | ||
91 | ret = kernctl_snapshot_get_produced(infd, pos); | |
92 | if (ret != 0) { | |
5a510c9f | 93 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
94 | } |
95 | ||
96 | return ret; | |
97 | } | |
98 | ||
07b86b52 JD |
99 | /* |
100 | * Get the consumerd position | |
101 | * | |
102 | * Returns 0 on success, < 0 on error | |
103 | */ | |
104 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
105 | unsigned long *pos) | |
106 | { | |
107 | int ret; | |
108 | int infd = stream->wait_fd; | |
109 | ||
110 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
111 | if (ret != 0) { | |
5a510c9f | 112 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
113 | } |
114 | ||
115 | return ret; | |
116 | } | |
117 | ||
128708c3 JG |
118 | static |
119 | int get_current_subbuf_addr(struct lttng_consumer_stream *stream, | |
120 | const char **addr) | |
121 | { | |
122 | int ret; | |
123 | unsigned long mmap_offset; | |
124 | const char *mmap_base = stream->mmap_base; | |
125 | ||
126 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
127 | if (ret < 0) { | |
128 | PERROR("Failed to get mmap read offset"); | |
129 | goto error; | |
130 | } | |
131 | ||
132 | *addr = mmap_base + mmap_offset; | |
133 | error: | |
134 | return ret; | |
135 | } | |
136 | ||
07b86b52 JD |
137 | /* |
138 | * Take a snapshot of all the stream of a channel | |
3eb928aa | 139 | * RCU read-side lock must be held across this function to ensure existence of |
d2956687 | 140 | * channel. The channel lock must be held by the caller. |
07b86b52 JD |
141 | * |
142 | * Returns 0 on success, < 0 on error | |
143 | */ | |
f72bb42f JG |
144 | static int lttng_kconsumer_snapshot_channel( |
145 | struct lttng_consumer_channel *channel, | |
146 | uint64_t key, char *path, uint64_t relayd_id, | |
147 | uint64_t nb_packets_per_stream, | |
5c786ded | 148 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
149 | { |
150 | int ret; | |
07b86b52 JD |
151 | struct lttng_consumer_stream *stream; |
152 | ||
6a00837f | 153 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 JD |
154 | |
155 | rcu_read_lock(); | |
156 | ||
07b86b52 JD |
157 | /* Splice is not supported yet for channel snapshot. */ |
158 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
9381314c JG |
159 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
160 | channel->name); | |
07b86b52 JD |
161 | ret = -1; |
162 | goto end; | |
163 | } | |
164 | ||
10a50311 | 165 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 166 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
167 | |
168 | health_code_update(); | |
169 | ||
07b86b52 JD |
170 | /* |
171 | * Lock stream because we are about to change its state. | |
172 | */ | |
173 | pthread_mutex_lock(&stream->lock); | |
174 | ||
d2956687 JG |
175 | assert(channel->trace_chunk); |
176 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { | |
177 | /* | |
178 | * Can't happen barring an internal error as the channel | |
179 | * holds a reference to the trace chunk. | |
180 | */ | |
181 | ERR("Failed to acquire reference to channel's trace chunk"); | |
182 | ret = -1; | |
183 | goto end_unlock; | |
184 | } | |
185 | assert(!stream->trace_chunk); | |
186 | stream->trace_chunk = channel->trace_chunk; | |
187 | ||
29decac3 DG |
188 | /* |
189 | * Assign the received relayd ID so we can use it for streaming. The streams | |
190 | * are not visible to anyone so this is OK to change it. | |
191 | */ | |
07b86b52 JD |
192 | stream->net_seq_idx = relayd_id; |
193 | channel->relayd_id = relayd_id; | |
194 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 195 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
196 | if (ret < 0) { |
197 | ERR("sending stream to relayd"); | |
198 | goto end_unlock; | |
199 | } | |
07b86b52 | 200 | } else { |
d2956687 JG |
201 | ret = consumer_stream_create_output_files(stream, |
202 | false); | |
07b86b52 | 203 | if (ret < 0) { |
07b86b52 JD |
204 | goto end_unlock; |
205 | } | |
d2956687 JG |
206 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", |
207 | stream->key); | |
07b86b52 JD |
208 | } |
209 | ||
f22dd891 | 210 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 211 | if (ret < 0) { |
f22dd891 MD |
212 | /* |
213 | * Doing a buffer flush which does not take into | |
214 | * account empty packets. This is not perfect | |
215 | * for stream intersection, but required as a | |
216 | * fall-back when "flush_empty" is not | |
217 | * implemented by lttng-modules. | |
218 | */ | |
219 | ret = kernctl_buffer_flush(stream->wait_fd); | |
220 | if (ret < 0) { | |
221 | ERR("Failed to flush kernel stream"); | |
222 | goto end_unlock; | |
223 | } | |
07b86b52 JD |
224 | goto end_unlock; |
225 | } | |
226 | ||
227 | ret = lttng_kconsumer_take_snapshot(stream); | |
228 | if (ret < 0) { | |
229 | ERR("Taking kernel snapshot"); | |
230 | goto end_unlock; | |
231 | } | |
232 | ||
233 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
234 | if (ret < 0) { | |
235 | ERR("Produced kernel snapshot position"); | |
236 | goto end_unlock; | |
237 | } | |
238 | ||
239 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
240 | if (ret < 0) { | |
241 | ERR("Consumerd kernel snapshot position"); | |
242 | goto end_unlock; | |
243 | } | |
244 | ||
d07ceecd MD |
245 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
246 | produced_pos, nb_packets_per_stream, | |
247 | stream->max_sb_size); | |
5c786ded | 248 | |
9377d830 | 249 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
250 | ssize_t read_len; |
251 | unsigned long len, padded_len; | |
128708c3 | 252 | const char *subbuf_addr; |
fd424d99 | 253 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 254 | |
9ce5646a | 255 | health_code_update(); |
07b86b52 JD |
256 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
257 | ||
258 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
259 | if (ret < 0) { | |
32af2c95 | 260 | if (ret != -EAGAIN) { |
07b86b52 JD |
261 | PERROR("kernctl_get_subbuf snapshot"); |
262 | goto end_unlock; | |
263 | } | |
264 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
265 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 266 | stream->chan->lost_packets++; |
07b86b52 JD |
267 | continue; |
268 | } | |
269 | ||
270 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
271 | if (ret < 0) { | |
272 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 273 | goto error_put_subbuf; |
07b86b52 JD |
274 | } |
275 | ||
276 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
277 | if (ret < 0) { | |
278 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 279 | goto error_put_subbuf; |
07b86b52 JD |
280 | } |
281 | ||
128708c3 JG |
282 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
283 | if (ret) { | |
284 | goto error_put_subbuf; | |
285 | } | |
286 | ||
fd424d99 JG |
287 | subbuf_view = lttng_buffer_view_init( |
288 | subbuf_addr, 0, padded_len); | |
128708c3 | 289 | read_len = lttng_consumer_on_read_subbuffer_mmap(ctx, |
fd424d99 | 290 | stream, &subbuf_view, |
309167d2 | 291 | padded_len - len, NULL); |
07b86b52 | 292 | /* |
29decac3 DG |
293 | * We write the padded len in local tracefiles but the data len |
294 | * when using a relay. Display the error but continue processing | |
295 | * to try to release the subbuffer. | |
07b86b52 JD |
296 | */ |
297 | if (relayd_id != (uint64_t) -1ULL) { | |
298 | if (read_len != len) { | |
299 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
300 | read_len, len); | |
301 | } | |
302 | } else { | |
303 | if (read_len != padded_len) { | |
304 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
305 | read_len, padded_len); | |
306 | } | |
307 | } | |
308 | ||
309 | ret = kernctl_put_subbuf(stream->wait_fd); | |
310 | if (ret < 0) { | |
311 | ERR("Snapshot kernctl_put_subbuf"); | |
312 | goto end_unlock; | |
313 | } | |
314 | consumed_pos += stream->max_sb_size; | |
315 | } | |
316 | ||
317 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
318 | if (stream->out_fd >= 0) { |
319 | ret = close(stream->out_fd); | |
320 | if (ret < 0) { | |
321 | PERROR("Kernel consumer snapshot close out_fd"); | |
322 | goto end_unlock; | |
323 | } | |
324 | stream->out_fd = -1; | |
07b86b52 | 325 | } |
07b86b52 JD |
326 | } else { |
327 | close_relayd_stream(stream); | |
328 | stream->net_seq_idx = (uint64_t) -1ULL; | |
329 | } | |
d2956687 JG |
330 | lttng_trace_chunk_put(stream->trace_chunk); |
331 | stream->trace_chunk = NULL; | |
07b86b52 JD |
332 | pthread_mutex_unlock(&stream->lock); |
333 | } | |
334 | ||
335 | /* All good! */ | |
336 | ret = 0; | |
337 | goto end; | |
338 | ||
29decac3 DG |
339 | error_put_subbuf: |
340 | ret = kernctl_put_subbuf(stream->wait_fd); | |
341 | if (ret < 0) { | |
342 | ERR("Snapshot kernctl_put_subbuf error path"); | |
343 | } | |
07b86b52 JD |
344 | end_unlock: |
345 | pthread_mutex_unlock(&stream->lock); | |
346 | end: | |
347 | rcu_read_unlock(); | |
348 | return ret; | |
349 | } | |
350 | ||
351 | /* | |
352 | * Read the whole metadata available for a snapshot. | |
3eb928aa | 353 | * RCU read-side lock must be held across this function to ensure existence of |
d2956687 | 354 | * metadata_channel. The channel lock must be held by the caller. |
07b86b52 JD |
355 | * |
356 | * Returns 0 on success, < 0 on error | |
357 | */ | |
d2956687 JG |
358 | static int lttng_kconsumer_snapshot_metadata( |
359 | struct lttng_consumer_channel *metadata_channel, | |
3eb928aa MD |
360 | uint64_t key, char *path, uint64_t relayd_id, |
361 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 362 | { |
d771f832 DG |
363 | int ret, use_relayd = 0; |
364 | ssize_t ret_read; | |
07b86b52 | 365 | struct lttng_consumer_stream *metadata_stream; |
d771f832 DG |
366 | |
367 | assert(ctx); | |
07b86b52 JD |
368 | |
369 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
370 | key, path); | |
371 | ||
372 | rcu_read_lock(); | |
373 | ||
07b86b52 JD |
374 | metadata_stream = metadata_channel->metadata_stream; |
375 | assert(metadata_stream); | |
d2956687 | 376 | |
fa27abe8 | 377 | pthread_mutex_lock(&metadata_stream->lock); |
d2956687 JG |
378 | assert(metadata_channel->trace_chunk); |
379 | assert(metadata_stream->trace_chunk); | |
07b86b52 | 380 | |
d771f832 | 381 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 382 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
383 | use_relayd = 1; |
384 | } | |
385 | ||
386 | if (use_relayd) { | |
10a50311 | 387 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 388 | if (ret < 0) { |
fa27abe8 | 389 | goto error_snapshot; |
e2039c7a | 390 | } |
e2039c7a | 391 | } else { |
d2956687 JG |
392 | ret = consumer_stream_create_output_files(metadata_stream, |
393 | false); | |
e2039c7a | 394 | if (ret < 0) { |
fa27abe8 | 395 | goto error_snapshot; |
e2039c7a | 396 | } |
07b86b52 | 397 | } |
07b86b52 | 398 | |
d771f832 | 399 | do { |
9ce5646a MD |
400 | health_code_update(); |
401 | ||
d2956687 | 402 | ret_read = lttng_kconsumer_read_subbuffer(metadata_stream, ctx); |
d771f832 | 403 | if (ret_read < 0) { |
56591bac | 404 | if (ret_read != -EAGAIN) { |
6a00837f | 405 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
d771f832 | 406 | ret_read); |
fa27abe8 JG |
407 | ret = ret_read; |
408 | goto error_snapshot; | |
07b86b52 | 409 | } |
d771f832 | 410 | /* ret_read is negative at this point so we will exit the loop. */ |
07b86b52 JD |
411 | continue; |
412 | } | |
d771f832 | 413 | } while (ret_read >= 0); |
07b86b52 | 414 | |
d771f832 DG |
415 | if (use_relayd) { |
416 | close_relayd_stream(metadata_stream); | |
417 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
418 | } else { | |
fdf9986c MD |
419 | if (metadata_stream->out_fd >= 0) { |
420 | ret = close(metadata_stream->out_fd); | |
421 | if (ret < 0) { | |
422 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
423 | /* | |
424 | * Don't go on error here since the snapshot was successful at this | |
425 | * point but somehow the close failed. | |
426 | */ | |
427 | } | |
428 | metadata_stream->out_fd = -1; | |
d2956687 JG |
429 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
430 | metadata_stream->trace_chunk = NULL; | |
e2039c7a | 431 | } |
e2039c7a JD |
432 | } |
433 | ||
07b86b52 | 434 | ret = 0; |
fa27abe8 JG |
435 | error_snapshot: |
436 | pthread_mutex_unlock(&metadata_stream->lock); | |
cf53a8a6 JD |
437 | cds_list_del(&metadata_stream->send_node); |
438 | consumer_stream_destroy(metadata_stream, NULL); | |
439 | metadata_channel->metadata_stream = NULL; | |
07b86b52 JD |
440 | rcu_read_unlock(); |
441 | return ret; | |
442 | } | |
443 | ||
1803a064 MD |
444 | /* |
445 | * Receive command from session daemon and process it. | |
446 | * | |
447 | * Return 1 on success else a negative value or 0. | |
448 | */ | |
3bd1e081 MD |
449 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
450 | int sock, struct pollfd *consumer_sockpoll) | |
451 | { | |
452 | ssize_t ret; | |
0c759fc9 | 453 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
454 | struct lttcomm_consumer_msg msg; |
455 | ||
9ce5646a MD |
456 | health_code_update(); |
457 | ||
3bd1e081 MD |
458 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
459 | if (ret != sizeof(msg)) { | |
1803a064 | 460 | if (ret > 0) { |
c6857fcf | 461 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
1803a064 MD |
462 | ret = -1; |
463 | } | |
3bd1e081 MD |
464 | return ret; |
465 | } | |
9ce5646a MD |
466 | |
467 | health_code_update(); | |
468 | ||
84382d49 MD |
469 | /* Deprecated command */ |
470 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 471 | |
9ce5646a MD |
472 | health_code_update(); |
473 | ||
b0b335c8 MD |
474 | /* relayd needs RCU read-side protection */ |
475 | rcu_read_lock(); | |
476 | ||
3bd1e081 | 477 | switch (msg.cmd_type) { |
00e2e675 DG |
478 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
479 | { | |
f50f23d9 | 480 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 481 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 482 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 | 483 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
2527bf85 | 484 | msg.u.relayd_sock.relayd_session_id); |
00e2e675 DG |
485 | goto end_nosignal; |
486 | } | |
3bd1e081 MD |
487 | case LTTNG_CONSUMER_ADD_CHANNEL: |
488 | { | |
489 | struct lttng_consumer_channel *new_channel; | |
e43c41c5 | 490 | int ret_recv; |
d2956687 | 491 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 492 | |
9ce5646a MD |
493 | health_code_update(); |
494 | ||
f50f23d9 DG |
495 | /* First send a status message before receiving the fds. */ |
496 | ret = consumer_send_status_msg(sock, ret_code); | |
497 | if (ret < 0) { | |
498 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 499 | goto error_fatal; |
f50f23d9 | 500 | } |
9ce5646a MD |
501 | |
502 | health_code_update(); | |
503 | ||
d88aee68 | 504 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 505 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
d2956687 JG |
506 | msg.u.channel.session_id, |
507 | msg.u.channel.chunk_id.is_set ? | |
508 | &chunk_id : NULL, | |
509 | msg.u.channel.pathname, | |
510 | msg.u.channel.name, | |
1624d5b7 JD |
511 | msg.u.channel.relayd_id, msg.u.channel.output, |
512 | msg.u.channel.tracefile_size, | |
1950109e | 513 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 514 | msg.u.channel.monitor, |
d7ba1388 | 515 | msg.u.channel.live_timer_interval, |
3d071855 | 516 | NULL, NULL); |
3bd1e081 | 517 | if (new_channel == NULL) { |
f73fabfd | 518 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
519 | goto end_nosignal; |
520 | } | |
ffe60014 | 521 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
522 | switch (msg.u.channel.output) { |
523 | case LTTNG_EVENT_SPLICE: | |
524 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
525 | break; | |
526 | case LTTNG_EVENT_MMAP: | |
527 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
528 | break; | |
529 | default: | |
530 | ERR("Channel output unknown %d", msg.u.channel.output); | |
531 | goto end_nosignal; | |
532 | } | |
ffe60014 DG |
533 | |
534 | /* Translate and save channel type. */ | |
535 | switch (msg.u.channel.type) { | |
536 | case CONSUMER_CHANNEL_TYPE_DATA: | |
537 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
538 | new_channel->type = msg.u.channel.type; | |
539 | break; | |
540 | default: | |
541 | assert(0); | |
542 | goto end_nosignal; | |
543 | }; | |
544 | ||
9ce5646a MD |
545 | health_code_update(); |
546 | ||
3bd1e081 | 547 | if (ctx->on_recv_channel != NULL) { |
e43c41c5 JD |
548 | ret_recv = ctx->on_recv_channel(new_channel); |
549 | if (ret_recv == 0) { | |
550 | ret = consumer_add_channel(new_channel, ctx); | |
551 | } else if (ret_recv < 0) { | |
3bd1e081 MD |
552 | goto end_nosignal; |
553 | } | |
554 | } else { | |
e43c41c5 | 555 | ret = consumer_add_channel(new_channel, ctx); |
3bd1e081 | 556 | } |
e9404c27 JG |
557 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && !ret) { |
558 | int monitor_start_ret; | |
559 | ||
560 | DBG("Consumer starting monitor timer"); | |
94d49140 JD |
561 | consumer_timer_live_start(new_channel, |
562 | msg.u.channel.live_timer_interval); | |
e9404c27 JG |
563 | monitor_start_ret = consumer_timer_monitor_start( |
564 | new_channel, | |
565 | msg.u.channel.monitor_timer_interval); | |
566 | if (monitor_start_ret < 0) { | |
567 | ERR("Starting channel monitoring timer failed"); | |
568 | goto end_nosignal; | |
569 | } | |
570 | ||
94d49140 | 571 | } |
e43c41c5 | 572 | |
9ce5646a MD |
573 | health_code_update(); |
574 | ||
e43c41c5 | 575 | /* If we received an error in add_channel, we need to report it. */ |
821fffb2 | 576 | if (ret < 0) { |
1803a064 MD |
577 | ret = consumer_send_status_msg(sock, ret); |
578 | if (ret < 0) { | |
579 | goto error_fatal; | |
580 | } | |
e43c41c5 JD |
581 | goto end_nosignal; |
582 | } | |
583 | ||
3bd1e081 MD |
584 | goto end_nosignal; |
585 | } | |
586 | case LTTNG_CONSUMER_ADD_STREAM: | |
587 | { | |
dae10966 DG |
588 | int fd; |
589 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 590 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 591 | struct lttng_consumer_channel *channel; |
c80048c6 | 592 | int alloc_ret = 0; |
3bd1e081 | 593 | |
ffe60014 DG |
594 | /* |
595 | * Get stream's channel reference. Needed when adding the stream to the | |
596 | * global hash table. | |
597 | */ | |
598 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
599 | if (!channel) { | |
600 | /* | |
601 | * We could not find the channel. Can happen if cpu hotplug | |
602 | * happens while tearing down. | |
603 | */ | |
d88aee68 | 604 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 605 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
606 | } |
607 | ||
9ce5646a MD |
608 | health_code_update(); |
609 | ||
f50f23d9 DG |
610 | /* First send a status message before receiving the fds. */ |
611 | ret = consumer_send_status_msg(sock, ret_code); | |
1803a064 | 612 | if (ret < 0) { |
d771f832 | 613 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 614 | goto error_add_stream_fatal; |
1803a064 | 615 | } |
9ce5646a MD |
616 | |
617 | health_code_update(); | |
618 | ||
0c759fc9 | 619 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 620 | /* Channel was not found. */ |
c5c7998f | 621 | goto error_add_stream_nosignal; |
f50f23d9 DG |
622 | } |
623 | ||
d771f832 | 624 | /* Blocking call */ |
9ce5646a MD |
625 | health_poll_entry(); |
626 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
627 | health_poll_exit(); | |
84382d49 | 628 | if (ret) { |
c5c7998f | 629 | goto error_add_stream_fatal; |
3bd1e081 | 630 | } |
00e2e675 | 631 | |
9ce5646a MD |
632 | health_code_update(); |
633 | ||
00e2e675 | 634 | /* Get stream file descriptor from socket */ |
f2fc6720 MD |
635 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
636 | if (ret != sizeof(fd)) { | |
f73fabfd | 637 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
c5c7998f | 638 | goto end; |
3bd1e081 | 639 | } |
3bd1e081 | 640 | |
9ce5646a MD |
641 | health_code_update(); |
642 | ||
f50f23d9 DG |
643 | /* |
644 | * Send status code to session daemon only if the recv works. If the | |
645 | * above recv() failed, the session daemon is notified through the | |
646 | * error socket and the teardown is eventually done. | |
647 | */ | |
648 | ret = consumer_send_status_msg(sock, ret_code); | |
649 | if (ret < 0) { | |
650 | /* Somehow, the session daemon is not responding anymore. */ | |
c5c7998f | 651 | goto error_add_stream_nosignal; |
f50f23d9 DG |
652 | } |
653 | ||
9ce5646a MD |
654 | health_code_update(); |
655 | ||
d2956687 | 656 | pthread_mutex_lock(&channel->lock); |
ffe60014 DG |
657 | new_stream = consumer_allocate_stream(channel->key, |
658 | fd, | |
ffe60014 | 659 | channel->name, |
ffe60014 DG |
660 | channel->relayd_id, |
661 | channel->session_id, | |
d2956687 | 662 | channel->trace_chunk, |
ffe60014 DG |
663 | msg.u.stream.cpu, |
664 | &alloc_ret, | |
4891ece8 | 665 | channel->type, |
d2956687 | 666 | channel->monitor); |
3bd1e081 | 667 | if (new_stream == NULL) { |
c80048c6 MD |
668 | switch (alloc_ret) { |
669 | case -ENOMEM: | |
670 | case -EINVAL: | |
671 | default: | |
672 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
673 | break; | |
c80048c6 | 674 | } |
d2956687 | 675 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 676 | goto error_add_stream_nosignal; |
3bd1e081 | 677 | } |
d771f832 | 678 | |
ffe60014 DG |
679 | new_stream->chan = channel; |
680 | new_stream->wait_fd = fd; | |
d05185fa JG |
681 | ret = kernctl_get_max_subbuf_size(new_stream->wait_fd, |
682 | &new_stream->max_sb_size); | |
683 | if (ret < 0) { | |
684 | pthread_mutex_unlock(&channel->lock); | |
685 | ERR("Failed to get kernel maximal subbuffer size"); | |
c5c7998f | 686 | goto error_add_stream_nosignal; |
d05185fa JG |
687 | } |
688 | ||
d9a2e16e JD |
689 | consumer_stream_update_channel_attributes(new_stream, |
690 | channel); | |
07b86b52 JD |
691 | switch (channel->output) { |
692 | case CONSUMER_CHANNEL_SPLICE: | |
693 | new_stream->output = LTTNG_EVENT_SPLICE; | |
a2361a61 JD |
694 | ret = utils_create_pipe(new_stream->splice_pipe); |
695 | if (ret < 0) { | |
d2956687 | 696 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 697 | goto error_add_stream_nosignal; |
a2361a61 | 698 | } |
07b86b52 JD |
699 | break; |
700 | case CONSUMER_CHANNEL_MMAP: | |
701 | new_stream->output = LTTNG_EVENT_MMAP; | |
702 | break; | |
703 | default: | |
704 | ERR("Stream output unknown %d", channel->output); | |
d2956687 | 705 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 706 | goto error_add_stream_nosignal; |
07b86b52 | 707 | } |
00e2e675 | 708 | |
a0c83db9 DG |
709 | /* |
710 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
711 | * refcount right now. We don't need to increment the refcount for |
712 | * streams in no monitor because we handle manually the cleanup of | |
713 | * those. It is very important to make sure there is NO prior | |
714 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 715 | */ |
07b86b52 JD |
716 | if (channel->monitor) { |
717 | uatomic_inc(&new_stream->chan->refcount); | |
718 | } | |
9d9353f9 | 719 | |
fb3a43a9 DG |
720 | /* |
721 | * The buffer flush is done on the session daemon side for the kernel | |
722 | * so no need for the stream "hangup_flush_done" variable to be | |
723 | * tracked. This is important for a kernel stream since we don't rely | |
724 | * on the flush state of the stream to read data. It's not the case for | |
725 | * user space tracing. | |
726 | */ | |
727 | new_stream->hangup_flush_done = 0; | |
728 | ||
9ce5646a MD |
729 | health_code_update(); |
730 | ||
d2956687 | 731 | pthread_mutex_lock(&new_stream->lock); |
633d0084 DG |
732 | if (ctx->on_recv_stream) { |
733 | ret = ctx->on_recv_stream(new_stream); | |
734 | if (ret < 0) { | |
d2956687 JG |
735 | pthread_mutex_unlock(&new_stream->lock); |
736 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 737 | consumer_stream_free(new_stream); |
c5c7998f | 738 | goto error_add_stream_nosignal; |
fb3a43a9 | 739 | } |
633d0084 | 740 | } |
9ce5646a MD |
741 | health_code_update(); |
742 | ||
07b86b52 JD |
743 | if (new_stream->metadata_flag) { |
744 | channel->metadata_stream = new_stream; | |
745 | } | |
746 | ||
2bba9e53 DG |
747 | /* Do not monitor this stream. */ |
748 | if (!channel->monitor) { | |
5eecee74 | 749 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 750 | "relayd id %" PRIu64, new_stream->name, |
5eecee74 | 751 | new_stream->net_seq_idx); |
10a50311 | 752 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
d2956687 JG |
753 | pthread_mutex_unlock(&new_stream->lock); |
754 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 755 | goto end_add_stream; |
6dc3064a DG |
756 | } |
757 | ||
e1b71bdc DG |
758 | /* Send stream to relayd if the stream has an ID. */ |
759 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
194ee077 DG |
760 | ret = consumer_send_relayd_stream(new_stream, |
761 | new_stream->chan->pathname); | |
e1b71bdc | 762 | if (ret < 0) { |
d2956687 JG |
763 | pthread_mutex_unlock(&new_stream->lock); |
764 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 765 | consumer_stream_free(new_stream); |
c5c7998f | 766 | goto error_add_stream_nosignal; |
e1b71bdc | 767 | } |
001b7e62 MD |
768 | |
769 | /* | |
770 | * If adding an extra stream to an already | |
771 | * existing channel (e.g. cpu hotplug), we need | |
772 | * to send the "streams_sent" command to relayd. | |
773 | */ | |
774 | if (channel->streams_sent_to_relayd) { | |
775 | ret = consumer_send_relayd_streams_sent( | |
776 | new_stream->net_seq_idx); | |
777 | if (ret < 0) { | |
d2956687 JG |
778 | pthread_mutex_unlock(&new_stream->lock); |
779 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 780 | goto error_add_stream_nosignal; |
001b7e62 MD |
781 | } |
782 | } | |
e2039c7a | 783 | } |
d2956687 JG |
784 | pthread_mutex_unlock(&new_stream->lock); |
785 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 786 | |
50f8ae69 | 787 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 788 | if (new_stream->metadata_flag) { |
66d583dc | 789 | consumer_add_metadata_stream(new_stream); |
dae10966 | 790 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 791 | } else { |
66d583dc | 792 | consumer_add_data_stream(new_stream); |
dae10966 | 793 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
794 | } |
795 | ||
66d583dc | 796 | /* Visible to other threads */ |
5ab66908 MD |
797 | new_stream->globally_visible = 1; |
798 | ||
9ce5646a MD |
799 | health_code_update(); |
800 | ||
dae10966 | 801 | ret = lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream)); |
50f8ae69 | 802 | if (ret < 0) { |
dae10966 | 803 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 804 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 805 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
806 | if (new_stream->metadata_flag) { |
807 | consumer_del_stream_for_metadata(new_stream); | |
808 | } else { | |
809 | consumer_del_stream_for_data(new_stream); | |
810 | } | |
c5c7998f | 811 | goto error_add_stream_nosignal; |
3bd1e081 | 812 | } |
00e2e675 | 813 | |
02d02e31 JD |
814 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
815 | new_stream->name, fd, new_stream->chan->pathname, new_stream->relayd_stream_id); | |
c5c7998f | 816 | end_add_stream: |
3bd1e081 | 817 | break; |
c5c7998f JG |
818 | error_add_stream_nosignal: |
819 | goto end_nosignal; | |
820 | error_add_stream_fatal: | |
821 | goto error_fatal; | |
3bd1e081 | 822 | } |
a4baae1b JD |
823 | case LTTNG_CONSUMER_STREAMS_SENT: |
824 | { | |
825 | struct lttng_consumer_channel *channel; | |
826 | ||
827 | /* | |
828 | * Get stream's channel reference. Needed when adding the stream to the | |
829 | * global hash table. | |
830 | */ | |
831 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
832 | if (!channel) { | |
833 | /* | |
834 | * We could not find the channel. Can happen if cpu hotplug | |
835 | * happens while tearing down. | |
836 | */ | |
837 | ERR("Unable to find channel key %" PRIu64, | |
838 | msg.u.sent_streams.channel_key); | |
e462382a | 839 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
840 | } |
841 | ||
842 | health_code_update(); | |
843 | ||
844 | /* | |
845 | * Send status code to session daemon. | |
846 | */ | |
847 | ret = consumer_send_status_msg(sock, ret_code); | |
f261ad0a | 848 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
a4baae1b | 849 | /* Somehow, the session daemon is not responding anymore. */ |
80d5a658 | 850 | goto error_streams_sent_nosignal; |
a4baae1b JD |
851 | } |
852 | ||
853 | health_code_update(); | |
854 | ||
855 | /* | |
856 | * We should not send this message if we don't monitor the | |
857 | * streams in this channel. | |
858 | */ | |
859 | if (!channel->monitor) { | |
80d5a658 | 860 | goto end_error_streams_sent; |
a4baae1b JD |
861 | } |
862 | ||
863 | health_code_update(); | |
864 | /* Send stream to relayd if the stream has an ID. */ | |
865 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
866 | ret = consumer_send_relayd_streams_sent( | |
867 | msg.u.sent_streams.net_seq_idx); | |
868 | if (ret < 0) { | |
80d5a658 | 869 | goto error_streams_sent_nosignal; |
a4baae1b | 870 | } |
001b7e62 | 871 | channel->streams_sent_to_relayd = true; |
a4baae1b | 872 | } |
80d5a658 | 873 | end_error_streams_sent: |
a4baae1b | 874 | break; |
80d5a658 JG |
875 | error_streams_sent_nosignal: |
876 | goto end_nosignal; | |
a4baae1b | 877 | } |
3bd1e081 MD |
878 | case LTTNG_CONSUMER_UPDATE_STREAM: |
879 | { | |
3f8e211f DG |
880 | rcu_read_unlock(); |
881 | return -ENOSYS; | |
882 | } | |
883 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
884 | { | |
a6ba4fe1 | 885 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f DG |
886 | struct consumer_relayd_sock_pair *relayd; |
887 | ||
a6ba4fe1 | 888 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
889 | |
890 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 891 | relayd = consumer_find_relayd(index); |
3f8e211f | 892 | if (relayd == NULL) { |
3448e266 | 893 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 894 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 895 | } |
3f8e211f | 896 | |
a6ba4fe1 DG |
897 | /* |
898 | * Each relayd socket pair has a refcount of stream attached to it | |
899 | * which tells if the relayd is still active or not depending on the | |
900 | * refcount value. | |
901 | * | |
902 | * This will set the destroy flag of the relayd object and destroy it | |
903 | * if the refcount reaches zero when called. | |
904 | * | |
905 | * The destroy can happen either here or when a stream fd hangs up. | |
906 | */ | |
f50f23d9 DG |
907 | if (relayd) { |
908 | consumer_flag_relayd_for_destroy(relayd); | |
909 | } | |
910 | ||
9ce5646a MD |
911 | health_code_update(); |
912 | ||
f50f23d9 DG |
913 | ret = consumer_send_status_msg(sock, ret_code); |
914 | if (ret < 0) { | |
915 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 916 | goto error_fatal; |
f50f23d9 | 917 | } |
3f8e211f | 918 | |
3f8e211f | 919 | goto end_nosignal; |
3bd1e081 | 920 | } |
6d805429 | 921 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 922 | { |
c8f59ee5 | 923 | int32_t ret; |
6d805429 | 924 | uint64_t id = msg.u.data_pending.session_id; |
c8f59ee5 | 925 | |
6d805429 | 926 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 927 | |
6d805429 | 928 | ret = consumer_data_pending(id); |
c8f59ee5 | 929 | |
9ce5646a MD |
930 | health_code_update(); |
931 | ||
c8f59ee5 DG |
932 | /* Send back returned value to session daemon */ |
933 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
934 | if (ret < 0) { | |
6d805429 | 935 | PERROR("send data pending ret code"); |
1803a064 | 936 | goto error_fatal; |
c8f59ee5 | 937 | } |
f50f23d9 DG |
938 | |
939 | /* | |
940 | * No need to send back a status message since the data pending | |
941 | * returned value is the response. | |
942 | */ | |
c8f59ee5 | 943 | break; |
53632229 | 944 | } |
6dc3064a DG |
945 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
946 | { | |
3eb928aa MD |
947 | struct lttng_consumer_channel *channel; |
948 | uint64_t key = msg.u.snapshot_channel.key; | |
949 | ||
950 | channel = consumer_find_channel(key); | |
951 | if (!channel) { | |
952 | ERR("Channel %" PRIu64 " not found", key); | |
953 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 954 | } else { |
d2956687 | 955 | pthread_mutex_lock(&channel->lock); |
3eb928aa MD |
956 | if (msg.u.snapshot_channel.metadata == 1) { |
957 | ret = lttng_kconsumer_snapshot_metadata(channel, key, | |
958 | msg.u.snapshot_channel.pathname, | |
959 | msg.u.snapshot_channel.relayd_id, ctx); | |
960 | if (ret < 0) { | |
961 | ERR("Snapshot metadata failed"); | |
962 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
963 | } | |
964 | } else { | |
965 | ret = lttng_kconsumer_snapshot_channel(channel, key, | |
966 | msg.u.snapshot_channel.pathname, | |
967 | msg.u.snapshot_channel.relayd_id, | |
968 | msg.u.snapshot_channel.nb_packets_per_stream, | |
969 | ctx); | |
970 | if (ret < 0) { | |
971 | ERR("Snapshot channel failed"); | |
972 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
973 | } | |
07b86b52 | 974 | } |
d2956687 | 975 | pthread_mutex_unlock(&channel->lock); |
07b86b52 | 976 | } |
9ce5646a MD |
977 | health_code_update(); |
978 | ||
6dc3064a DG |
979 | ret = consumer_send_status_msg(sock, ret_code); |
980 | if (ret < 0) { | |
981 | /* Somehow, the session daemon is not responding anymore. */ | |
982 | goto end_nosignal; | |
983 | } | |
984 | break; | |
985 | } | |
07b86b52 JD |
986 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
987 | { | |
988 | uint64_t key = msg.u.destroy_channel.key; | |
989 | struct lttng_consumer_channel *channel; | |
990 | ||
991 | channel = consumer_find_channel(key); | |
992 | if (!channel) { | |
993 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 994 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
995 | } |
996 | ||
9ce5646a MD |
997 | health_code_update(); |
998 | ||
07b86b52 JD |
999 | ret = consumer_send_status_msg(sock, ret_code); |
1000 | if (ret < 0) { | |
1001 | /* Somehow, the session daemon is not responding anymore. */ | |
a9d36096 | 1002 | goto end_destroy_channel; |
07b86b52 JD |
1003 | } |
1004 | ||
9ce5646a MD |
1005 | health_code_update(); |
1006 | ||
15dc512a DG |
1007 | /* Stop right now if no channel was found. */ |
1008 | if (!channel) { | |
a9d36096 | 1009 | goto end_destroy_channel; |
15dc512a DG |
1010 | } |
1011 | ||
07b86b52 JD |
1012 | /* |
1013 | * This command should ONLY be issued for channel with streams set in | |
1014 | * no monitor mode. | |
1015 | */ | |
1016 | assert(!channel->monitor); | |
1017 | ||
1018 | /* | |
1019 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1020 | * monitor mode. | |
1021 | */ | |
1022 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
1023 | ||
1024 | consumer_del_channel(channel); | |
a9d36096 | 1025 | end_destroy_channel: |
07b86b52 JD |
1026 | goto end_nosignal; |
1027 | } | |
fb83fe64 JD |
1028 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1029 | { | |
66ab32be JD |
1030 | ssize_t ret; |
1031 | uint64_t count; | |
fb83fe64 JD |
1032 | struct lttng_consumer_channel *channel; |
1033 | uint64_t id = msg.u.discarded_events.session_id; | |
1034 | uint64_t key = msg.u.discarded_events.channel_key; | |
1035 | ||
e5742757 MD |
1036 | DBG("Kernel consumer discarded events command for session id %" |
1037 | PRIu64 ", channel key %" PRIu64, id, key); | |
1038 | ||
fb83fe64 JD |
1039 | channel = consumer_find_channel(key); |
1040 | if (!channel) { | |
1041 | ERR("Kernel consumer discarded events channel %" | |
1042 | PRIu64 " not found", key); | |
66ab32be | 1043 | count = 0; |
e5742757 | 1044 | } else { |
66ab32be | 1045 | count = channel->discarded_events; |
fb83fe64 JD |
1046 | } |
1047 | ||
fb83fe64 JD |
1048 | health_code_update(); |
1049 | ||
1050 | /* Send back returned value to session daemon */ | |
66ab32be | 1051 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1052 | if (ret < 0) { |
1053 | PERROR("send discarded events"); | |
1054 | goto error_fatal; | |
1055 | } | |
1056 | ||
1057 | break; | |
1058 | } | |
1059 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1060 | { | |
66ab32be JD |
1061 | ssize_t ret; |
1062 | uint64_t count; | |
fb83fe64 JD |
1063 | struct lttng_consumer_channel *channel; |
1064 | uint64_t id = msg.u.lost_packets.session_id; | |
1065 | uint64_t key = msg.u.lost_packets.channel_key; | |
1066 | ||
e5742757 MD |
1067 | DBG("Kernel consumer lost packets command for session id %" |
1068 | PRIu64 ", channel key %" PRIu64, id, key); | |
1069 | ||
fb83fe64 JD |
1070 | channel = consumer_find_channel(key); |
1071 | if (!channel) { | |
1072 | ERR("Kernel consumer lost packets channel %" | |
1073 | PRIu64 " not found", key); | |
66ab32be | 1074 | count = 0; |
e5742757 | 1075 | } else { |
66ab32be | 1076 | count = channel->lost_packets; |
fb83fe64 JD |
1077 | } |
1078 | ||
fb83fe64 JD |
1079 | health_code_update(); |
1080 | ||
1081 | /* Send back returned value to session daemon */ | |
66ab32be | 1082 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1083 | if (ret < 0) { |
1084 | PERROR("send lost packets"); | |
1085 | goto error_fatal; | |
1086 | } | |
1087 | ||
1088 | break; | |
1089 | } | |
b3530820 JG |
1090 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1091 | { | |
1092 | int channel_monitor_pipe; | |
1093 | ||
1094 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1095 | /* Successfully received the command's type. */ | |
1096 | ret = consumer_send_status_msg(sock, ret_code); | |
1097 | if (ret < 0) { | |
1098 | goto error_fatal; | |
1099 | } | |
1100 | ||
1101 | ret = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, | |
1102 | 1); | |
1103 | if (ret != sizeof(channel_monitor_pipe)) { | |
1104 | ERR("Failed to receive channel monitor pipe"); | |
1105 | goto error_fatal; | |
1106 | } | |
1107 | ||
1108 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
1109 | ret = consumer_timer_thread_set_channel_monitor_pipe( | |
1110 | channel_monitor_pipe); | |
1111 | if (!ret) { | |
1112 | int flags; | |
1113 | ||
1114 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1115 | /* Set the pipe as non-blocking. */ | |
1116 | ret = fcntl(channel_monitor_pipe, F_GETFL, 0); | |
1117 | if (ret == -1) { | |
1118 | PERROR("fcntl get flags of the channel monitoring pipe"); | |
1119 | goto error_fatal; | |
1120 | } | |
1121 | flags = ret; | |
1122 | ||
1123 | ret = fcntl(channel_monitor_pipe, F_SETFL, | |
1124 | flags | O_NONBLOCK); | |
1125 | if (ret == -1) { | |
1126 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); | |
1127 | goto error_fatal; | |
1128 | } | |
1129 | DBG("Channel monitor pipe set as non-blocking"); | |
1130 | } else { | |
1131 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1132 | } | |
1133 | ret = consumer_send_status_msg(sock, ret_code); | |
1134 | if (ret < 0) { | |
1135 | goto error_fatal; | |
1136 | } | |
1137 | break; | |
1138 | } | |
b99a8d42 JD |
1139 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1140 | { | |
92b7a7f8 MD |
1141 | struct lttng_consumer_channel *channel; |
1142 | uint64_t key = msg.u.rotate_channel.key; | |
b99a8d42 | 1143 | |
92b7a7f8 | 1144 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1145 | |
92b7a7f8 MD |
1146 | channel = consumer_find_channel(key); |
1147 | if (!channel) { | |
1148 | ERR("Channel %" PRIu64 " not found", key); | |
1149 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1150 | } else { | |
1151 | /* | |
1152 | * Sample the rotate position of all the streams in this channel. | |
1153 | */ | |
1154 | ret = lttng_consumer_rotate_channel(channel, key, | |
92b7a7f8 MD |
1155 | msg.u.rotate_channel.relayd_id, |
1156 | msg.u.rotate_channel.metadata, | |
92b7a7f8 MD |
1157 | ctx); |
1158 | if (ret < 0) { | |
1159 | ERR("Rotate channel failed"); | |
1160 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1161 | } | |
b99a8d42 | 1162 | |
92b7a7f8 MD |
1163 | health_code_update(); |
1164 | } | |
b99a8d42 JD |
1165 | ret = consumer_send_status_msg(sock, ret_code); |
1166 | if (ret < 0) { | |
1167 | /* Somehow, the session daemon is not responding anymore. */ | |
713bdd26 | 1168 | goto error_rotate_channel; |
b99a8d42 | 1169 | } |
92b7a7f8 MD |
1170 | if (channel) { |
1171 | /* Rotate the streams that are ready right now. */ | |
1172 | ret = lttng_consumer_rotate_ready_streams( | |
1173 | channel, key, ctx); | |
1174 | if (ret < 0) { | |
1175 | ERR("Rotate ready streams failed"); | |
1176 | } | |
b99a8d42 | 1177 | } |
b99a8d42 | 1178 | break; |
713bdd26 JG |
1179 | error_rotate_channel: |
1180 | goto end_nosignal; | |
b99a8d42 | 1181 | } |
5f3aff8b MD |
1182 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
1183 | { | |
1184 | struct lttng_consumer_channel *channel; | |
1185 | uint64_t key = msg.u.clear_channel.key; | |
1186 | ||
1187 | channel = consumer_find_channel(key); | |
1188 | if (!channel) { | |
1189 | DBG("Channel %" PRIu64 " not found", key); | |
1190 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1191 | } else { | |
1192 | ret = lttng_consumer_clear_channel(channel); | |
1193 | if (ret) { | |
1194 | ERR("Clear channel failed"); | |
1195 | ret_code = ret; | |
1196 | } | |
1197 | ||
1198 | health_code_update(); | |
1199 | } | |
1200 | ret = consumer_send_status_msg(sock, ret_code); | |
1201 | if (ret < 0) { | |
1202 | /* Somehow, the session daemon is not responding anymore. */ | |
1203 | goto end_nosignal; | |
1204 | } | |
1205 | ||
1206 | break; | |
1207 | } | |
d2956687 | 1208 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1209 | { |
d2956687 JG |
1210 | ret_code = lttng_consumer_init_command(ctx, |
1211 | msg.u.init.sessiond_uuid); | |
00fb02ac | 1212 | health_code_update(); |
00fb02ac JD |
1213 | ret = consumer_send_status_msg(sock, ret_code); |
1214 | if (ret < 0) { | |
1215 | /* Somehow, the session daemon is not responding anymore. */ | |
1216 | goto end_nosignal; | |
1217 | } | |
1218 | break; | |
1219 | } | |
d2956687 | 1220 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1221 | { |
d2956687 | 1222 | const struct lttng_credentials credentials = { |
e5add6d0 JG |
1223 | .uid = msg.u.create_trace_chunk.credentials.value.uid, |
1224 | .gid = msg.u.create_trace_chunk.credentials.value.gid, | |
d2956687 JG |
1225 | }; |
1226 | const bool is_local_trace = | |
1227 | !msg.u.create_trace_chunk.relayd_id.is_set; | |
1228 | const uint64_t relayd_id = | |
1229 | msg.u.create_trace_chunk.relayd_id.value; | |
1230 | const char *chunk_override_name = | |
1231 | *msg.u.create_trace_chunk.override_name ? | |
1232 | msg.u.create_trace_chunk.override_name : | |
1233 | NULL; | |
cbf53d23 | 1234 | struct lttng_directory_handle *chunk_directory_handle = NULL; |
d88744a4 | 1235 | |
d2956687 JG |
1236 | /* |
1237 | * The session daemon will only provide a chunk directory file | |
1238 | * descriptor for local traces. | |
1239 | */ | |
1240 | if (is_local_trace) { | |
1241 | int chunk_dirfd; | |
19990ed5 | 1242 | |
d2956687 JG |
1243 | /* Acnowledge the reception of the command. */ |
1244 | ret = consumer_send_status_msg(sock, | |
1245 | LTTCOMM_CONSUMERD_SUCCESS); | |
1246 | if (ret < 0) { | |
1247 | /* Somehow, the session daemon is not responding anymore. */ | |
1248 | goto end_nosignal; | |
1249 | } | |
92816cc3 | 1250 | |
d2956687 JG |
1251 | ret = lttcomm_recv_fds_unix_sock(sock, &chunk_dirfd, 1); |
1252 | if (ret != sizeof(chunk_dirfd)) { | |
1253 | ERR("Failed to receive trace chunk directory file descriptor"); | |
1254 | goto error_fatal; | |
1255 | } | |
92816cc3 | 1256 | |
d2956687 JG |
1257 | DBG("Received trace chunk directory fd (%d)", |
1258 | chunk_dirfd); | |
cbf53d23 | 1259 | chunk_directory_handle = lttng_directory_handle_create_from_dirfd( |
d2956687 | 1260 | chunk_dirfd); |
cbf53d23 | 1261 | if (!chunk_directory_handle) { |
d2956687 JG |
1262 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); |
1263 | if (close(chunk_dirfd)) { | |
1264 | PERROR("Failed to close chunk directory file descriptor"); | |
1265 | } | |
1266 | goto error_fatal; | |
1267 | } | |
92816cc3 JG |
1268 | } |
1269 | ||
d2956687 JG |
1270 | ret_code = lttng_consumer_create_trace_chunk( |
1271 | !is_local_trace ? &relayd_id : NULL, | |
1272 | msg.u.create_trace_chunk.session_id, | |
1273 | msg.u.create_trace_chunk.chunk_id, | |
e5add6d0 JG |
1274 | (time_t) msg.u.create_trace_chunk |
1275 | .creation_timestamp, | |
d2956687 | 1276 | chunk_override_name, |
e5add6d0 JG |
1277 | msg.u.create_trace_chunk.credentials.is_set ? |
1278 | &credentials : | |
1279 | NULL, | |
cbf53d23 JG |
1280 | chunk_directory_handle); |
1281 | lttng_directory_handle_put(chunk_directory_handle); | |
d2956687 | 1282 | goto end_msg_sessiond; |
d88744a4 | 1283 | } |
d2956687 | 1284 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1285 | { |
bbc4768c JG |
1286 | enum lttng_trace_chunk_command_type close_command = |
1287 | msg.u.close_trace_chunk.close_command.value; | |
d2956687 JG |
1288 | const uint64_t relayd_id = |
1289 | msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f MD |
1290 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1291 | char path[LTTNG_PATH_MAX]; | |
d2956687 JG |
1292 | |
1293 | ret_code = lttng_consumer_close_trace_chunk( | |
1294 | msg.u.close_trace_chunk.relayd_id.is_set ? | |
bbc4768c JG |
1295 | &relayd_id : |
1296 | NULL, | |
d2956687 JG |
1297 | msg.u.close_trace_chunk.session_id, |
1298 | msg.u.close_trace_chunk.chunk_id, | |
bbc4768c JG |
1299 | (time_t) msg.u.close_trace_chunk.close_timestamp, |
1300 | msg.u.close_trace_chunk.close_command.is_set ? | |
1301 | &close_command : | |
ecd1a12f MD |
1302 | NULL, path); |
1303 | reply.ret_code = ret_code; | |
1304 | reply.path_length = strlen(path) + 1; | |
1305 | ret = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); | |
1306 | if (ret != sizeof(reply)) { | |
1307 | goto error_fatal; | |
1308 | } | |
1309 | ret = lttcomm_send_unix_sock(sock, path, reply.path_length); | |
1310 | if (ret != reply.path_length) { | |
1311 | goto error_fatal; | |
1312 | } | |
1313 | goto end_nosignal; | |
3654ed19 | 1314 | } |
d2956687 | 1315 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 1316 | { |
d2956687 JG |
1317 | const uint64_t relayd_id = |
1318 | msg.u.trace_chunk_exists.relayd_id.value; | |
1319 | ||
1320 | ret_code = lttng_consumer_trace_chunk_exists( | |
1321 | msg.u.trace_chunk_exists.relayd_id.is_set ? | |
1322 | &relayd_id : NULL, | |
1323 | msg.u.trace_chunk_exists.session_id, | |
1324 | msg.u.trace_chunk_exists.chunk_id); | |
1325 | goto end_msg_sessiond; | |
a1ae2ea5 | 1326 | } |
3bd1e081 | 1327 | default: |
3f8e211f | 1328 | goto end_nosignal; |
3bd1e081 | 1329 | } |
3f8e211f | 1330 | |
3bd1e081 | 1331 | end_nosignal: |
4cbc1a04 DG |
1332 | /* |
1333 | * Return 1 to indicate success since the 0 value can be a socket | |
1334 | * shutdown during the recv() or send() call. | |
1335 | */ | |
c5c7998f JG |
1336 | ret = 1; |
1337 | goto end; | |
1338 | error_fatal: | |
1339 | /* This will issue a consumer stop. */ | |
1340 | ret = -1; | |
1341 | goto end; | |
d2956687 JG |
1342 | end_msg_sessiond: |
1343 | /* | |
1344 | * The returned value here is not useful since either way we'll return 1 to | |
1345 | * the caller because the session daemon socket management is done | |
1346 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1347 | */ | |
1348 | ret = consumer_send_status_msg(sock, ret_code); | |
1349 | if (ret < 0) { | |
1350 | goto error_fatal; | |
1351 | } | |
c5c7998f JG |
1352 | ret = 1; |
1353 | end: | |
d2956687 | 1354 | health_code_update(); |
1803a064 | 1355 | rcu_read_unlock(); |
c5c7998f | 1356 | return ret; |
3bd1e081 | 1357 | } |
d41f73b7 | 1358 | |
309167d2 JD |
1359 | /* |
1360 | * Populate index values of a kernel stream. Values are set in big endian order. | |
1361 | * | |
1362 | * Return 0 on success or else a negative value. | |
1363 | */ | |
50adc264 | 1364 | static int get_index_values(struct ctf_packet_index *index, int infd) |
309167d2 JD |
1365 | { |
1366 | int ret; | |
85d1db9f JG |
1367 | uint64_t packet_size, content_size, timestamp_begin, timestamp_end, |
1368 | events_discarded, stream_id, stream_instance_id, | |
1369 | packet_seq_num; | |
309167d2 | 1370 | |
85d1db9f | 1371 | ret = kernctl_get_timestamp_begin(infd, ×tamp_begin); |
309167d2 JD |
1372 | if (ret < 0) { |
1373 | PERROR("kernctl_get_timestamp_begin"); | |
1374 | goto error; | |
1375 | } | |
309167d2 | 1376 | |
85d1db9f | 1377 | ret = kernctl_get_timestamp_end(infd, ×tamp_end); |
309167d2 JD |
1378 | if (ret < 0) { |
1379 | PERROR("kernctl_get_timestamp_end"); | |
1380 | goto error; | |
1381 | } | |
309167d2 | 1382 | |
85d1db9f | 1383 | ret = kernctl_get_events_discarded(infd, &events_discarded); |
309167d2 JD |
1384 | if (ret < 0) { |
1385 | PERROR("kernctl_get_events_discarded"); | |
1386 | goto error; | |
1387 | } | |
309167d2 | 1388 | |
85d1db9f | 1389 | ret = kernctl_get_content_size(infd, &content_size); |
309167d2 JD |
1390 | if (ret < 0) { |
1391 | PERROR("kernctl_get_content_size"); | |
1392 | goto error; | |
1393 | } | |
309167d2 | 1394 | |
85d1db9f | 1395 | ret = kernctl_get_packet_size(infd, &packet_size); |
309167d2 JD |
1396 | if (ret < 0) { |
1397 | PERROR("kernctl_get_packet_size"); | |
1398 | goto error; | |
1399 | } | |
309167d2 | 1400 | |
85d1db9f | 1401 | ret = kernctl_get_stream_id(infd, &stream_id); |
309167d2 JD |
1402 | if (ret < 0) { |
1403 | PERROR("kernctl_get_stream_id"); | |
1404 | goto error; | |
1405 | } | |
309167d2 | 1406 | |
85d1db9f | 1407 | ret = kernctl_get_instance_id(infd, &stream_instance_id); |
234cd636 | 1408 | if (ret < 0) { |
f0b03c22 MD |
1409 | if (ret == -ENOTTY) { |
1410 | /* Command not implemented by lttng-modules. */ | |
85d1db9f | 1411 | stream_instance_id = -1ULL; |
f0b03c22 MD |
1412 | } else { |
1413 | PERROR("kernctl_get_instance_id"); | |
1414 | goto error; | |
1415 | } | |
234cd636 | 1416 | } |
234cd636 | 1417 | |
85d1db9f | 1418 | ret = kernctl_get_sequence_number(infd, &packet_seq_num); |
234cd636 | 1419 | if (ret < 0) { |
f0b03c22 MD |
1420 | if (ret == -ENOTTY) { |
1421 | /* Command not implemented by lttng-modules. */ | |
85d1db9f | 1422 | packet_seq_num = -1ULL; |
f0b03c22 MD |
1423 | ret = 0; |
1424 | } else { | |
1425 | PERROR("kernctl_get_sequence_number"); | |
1426 | goto error; | |
1427 | } | |
234cd636 JD |
1428 | } |
1429 | index->packet_seq_num = htobe64(index->packet_seq_num); | |
1430 | ||
85d1db9f JG |
1431 | *index = (typeof(*index)) { |
1432 | .offset = index->offset, | |
1433 | .packet_size = htobe64(packet_size), | |
1434 | .content_size = htobe64(content_size), | |
1435 | .timestamp_begin = htobe64(timestamp_begin), | |
1436 | .timestamp_end = htobe64(timestamp_end), | |
1437 | .events_discarded = htobe64(events_discarded), | |
1438 | .stream_id = htobe64(stream_id), | |
1439 | .stream_instance_id = htobe64(stream_instance_id), | |
1440 | .packet_seq_num = htobe64(packet_seq_num), | |
1441 | }; | |
1442 | ||
309167d2 JD |
1443 | error: |
1444 | return ret; | |
1445 | } | |
94d49140 JD |
1446 | /* |
1447 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1448 | * metadata thread can consumer them. | |
1449 | * | |
1450 | * Metadata stream lock MUST be acquired. | |
1451 | * | |
1452 | * Return 0 if new metadatda is available, EAGAIN if the metadata stream | |
1453 | * is empty or a negative value on error. | |
1454 | */ | |
1455 | int lttng_kconsumer_sync_metadata(struct lttng_consumer_stream *metadata) | |
1456 | { | |
1457 | int ret; | |
1458 | ||
1459 | assert(metadata); | |
1460 | ||
1461 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1462 | if (ret < 0) { | |
1463 | ERR("Failed to flush kernel stream"); | |
1464 | goto end; | |
1465 | } | |
1466 | ||
1467 | ret = kernctl_snapshot(metadata->wait_fd); | |
1468 | if (ret < 0) { | |
32af2c95 | 1469 | if (ret != -EAGAIN) { |
94d49140 JD |
1470 | ERR("Sync metadata, taking kernel snapshot failed."); |
1471 | goto end; | |
1472 | } | |
1473 | DBG("Sync metadata, no new kernel metadata"); | |
1474 | /* No new metadata, exit. */ | |
1475 | ret = ENODATA; | |
1476 | goto end; | |
1477 | } | |
1478 | ||
1479 | end: | |
1480 | return ret; | |
1481 | } | |
309167d2 | 1482 | |
fb83fe64 JD |
1483 | static |
1484 | int update_stream_stats(struct lttng_consumer_stream *stream) | |
1485 | { | |
1486 | int ret; | |
1487 | uint64_t seq, discarded; | |
1488 | ||
1489 | ret = kernctl_get_sequence_number(stream->wait_fd, &seq); | |
1490 | if (ret < 0) { | |
f0b03c22 MD |
1491 | if (ret == -ENOTTY) { |
1492 | /* Command not implemented by lttng-modules. */ | |
1493 | seq = -1ULL; | |
a40a503f | 1494 | stream->sequence_number_unavailable = true; |
f0b03c22 MD |
1495 | } else { |
1496 | PERROR("kernctl_get_sequence_number"); | |
1497 | goto end; | |
1498 | } | |
fb83fe64 JD |
1499 | } |
1500 | ||
1501 | /* | |
1502 | * Start the sequence when we extract the first packet in case we don't | |
1503 | * start at 0 (for example if a consumer is not connected to the | |
1504 | * session immediately after the beginning). | |
1505 | */ | |
1506 | if (stream->last_sequence_number == -1ULL) { | |
1507 | stream->last_sequence_number = seq; | |
1508 | } else if (seq > stream->last_sequence_number) { | |
1509 | stream->chan->lost_packets += seq - | |
1510 | stream->last_sequence_number - 1; | |
1511 | } else { | |
1512 | /* seq <= last_sequence_number */ | |
1513 | ERR("Sequence number inconsistent : prev = %" PRIu64 | |
1514 | ", current = %" PRIu64, | |
1515 | stream->last_sequence_number, seq); | |
1516 | ret = -1; | |
1517 | goto end; | |
1518 | } | |
1519 | stream->last_sequence_number = seq; | |
1520 | ||
1521 | ret = kernctl_get_events_discarded(stream->wait_fd, &discarded); | |
1522 | if (ret < 0) { | |
1523 | PERROR("kernctl_get_events_discarded"); | |
1524 | goto end; | |
1525 | } | |
1526 | if (discarded < stream->last_discarded_events) { | |
1527 | /* | |
83f4233d MJ |
1528 | * Overflow has occurred. We assume only one wrap-around |
1529 | * has occurred. | |
fb83fe64 JD |
1530 | */ |
1531 | stream->chan->discarded_events += (1ULL << (CAA_BITS_PER_LONG - 1)) - | |
1532 | stream->last_discarded_events + discarded; | |
1533 | } else { | |
1534 | stream->chan->discarded_events += discarded - | |
1535 | stream->last_discarded_events; | |
1536 | } | |
1537 | stream->last_discarded_events = discarded; | |
1538 | ret = 0; | |
1539 | ||
1540 | end: | |
1541 | return ret; | |
1542 | } | |
1543 | ||
93ec662e JD |
1544 | /* |
1545 | * Check if the local version of the metadata stream matches with the version | |
1546 | * of the metadata stream in the kernel. If it was updated, set the reset flag | |
1547 | * on the stream. | |
1548 | */ | |
1549 | static | |
1550 | int metadata_stream_check_version(int infd, struct lttng_consumer_stream *stream) | |
1551 | { | |
1552 | int ret; | |
1553 | uint64_t cur_version; | |
1554 | ||
1555 | ret = kernctl_get_metadata_version(infd, &cur_version); | |
1556 | if (ret < 0) { | |
f0b03c22 MD |
1557 | if (ret == -ENOTTY) { |
1558 | /* | |
1559 | * LTTng-modules does not implement this | |
1560 | * command. | |
1561 | */ | |
1562 | ret = 0; | |
1563 | goto end; | |
1564 | } | |
93ec662e JD |
1565 | ERR("Failed to get the metadata version"); |
1566 | goto end; | |
1567 | } | |
1568 | ||
1569 | if (stream->metadata_version == cur_version) { | |
1570 | ret = 0; | |
1571 | goto end; | |
1572 | } | |
1573 | ||
1574 | DBG("New metadata version detected"); | |
1575 | stream->metadata_version = cur_version; | |
1576 | stream->reset_metadata_flag = 1; | |
1577 | ret = 0; | |
1578 | ||
1579 | end: | |
1580 | return ret; | |
1581 | } | |
1582 | ||
d41f73b7 MD |
1583 | /* |
1584 | * Consume data on a file descriptor and write it on a trace file. | |
d2956687 | 1585 | * The stream and channel locks must be held by the caller. |
d41f73b7 | 1586 | */ |
4078b776 | 1587 | ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d2956687 | 1588 | struct lttng_consumer_local_data *ctx) |
d41f73b7 | 1589 | { |
1d4dfdef | 1590 | unsigned long len, subbuf_size, padding; |
02d02e31 | 1591 | int err, write_index = 1, rotation_ret; |
4078b776 | 1592 | ssize_t ret = 0; |
d41f73b7 | 1593 | int infd = stream->wait_fd; |
d3faab47 | 1594 | struct ctf_packet_index index = {}; |
d41f73b7 MD |
1595 | |
1596 | DBG("In read_subbuffer (infd : %d)", infd); | |
309167d2 | 1597 | |
02d02e31 JD |
1598 | /* |
1599 | * If the stream was flagged to be ready for rotation before we extract the | |
1600 | * next packet, rotate it now. | |
1601 | */ | |
1602 | if (stream->rotate_ready) { | |
1603 | DBG("Rotate stream before extracting data"); | |
d2956687 | 1604 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream); |
02d02e31 JD |
1605 | if (rotation_ret < 0) { |
1606 | ERR("Stream rotation error"); | |
1607 | ret = -1; | |
1608 | goto error; | |
1609 | } | |
1610 | } | |
1611 | ||
d41f73b7 MD |
1612 | /* Get the next subbuffer */ |
1613 | err = kernctl_get_next_subbuf(infd); | |
1614 | if (err != 0) { | |
d41f73b7 MD |
1615 | /* |
1616 | * This is a debug message even for single-threaded consumer, | |
1617 | * because poll() have more relaxed criterions than get subbuf, | |
1618 | * so get_subbuf may fail for short race windows where poll() | |
1619 | * would issue wakeups. | |
1620 | */ | |
1621 | DBG("Reserving sub buffer failed (everything is normal, " | |
1622 | "it is due to concurrency)"); | |
32af2c95 | 1623 | ret = err; |
02d02e31 | 1624 | goto error; |
d41f73b7 MD |
1625 | } |
1626 | ||
1d4dfdef DG |
1627 | /* Get the full subbuffer size including padding */ |
1628 | err = kernctl_get_padded_subbuf_size(infd, &len); | |
1629 | if (err != 0) { | |
5a510c9f | 1630 | PERROR("Getting sub-buffer len failed."); |
8265f19e MD |
1631 | err = kernctl_put_subbuf(infd); |
1632 | if (err != 0) { | |
32af2c95 | 1633 | if (err == -EFAULT) { |
5a510c9f | 1634 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1635 | } else if (err == -EIO) { |
8265f19e | 1636 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1637 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1638 | } |
32af2c95 | 1639 | ret = err; |
02d02e31 | 1640 | goto error; |
8265f19e | 1641 | } |
32af2c95 | 1642 | ret = err; |
02d02e31 | 1643 | goto error; |
1d4dfdef DG |
1644 | } |
1645 | ||
1c20f0e2 | 1646 | if (!stream->metadata_flag) { |
309167d2 JD |
1647 | ret = get_index_values(&index, infd); |
1648 | if (ret < 0) { | |
8265f19e MD |
1649 | err = kernctl_put_subbuf(infd); |
1650 | if (err != 0) { | |
32af2c95 | 1651 | if (err == -EFAULT) { |
5a510c9f | 1652 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1653 | } else if (err == -EIO) { |
8265f19e | 1654 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1655 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1656 | } |
32af2c95 | 1657 | ret = err; |
02d02e31 | 1658 | goto error; |
8265f19e | 1659 | } |
02d02e31 | 1660 | goto error; |
309167d2 | 1661 | } |
fb83fe64 JD |
1662 | ret = update_stream_stats(stream); |
1663 | if (ret < 0) { | |
7b87473d MD |
1664 | err = kernctl_put_subbuf(infd); |
1665 | if (err != 0) { | |
1666 | if (err == -EFAULT) { | |
1667 | PERROR("Error in unreserving sub buffer\n"); | |
1668 | } else if (err == -EIO) { | |
1669 | /* Should never happen with newer LTTng versions */ | |
1670 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); | |
1671 | } | |
1672 | ret = err; | |
02d02e31 | 1673 | goto error; |
7b87473d | 1674 | } |
02d02e31 | 1675 | goto error; |
fb83fe64 | 1676 | } |
1c20f0e2 JD |
1677 | } else { |
1678 | write_index = 0; | |
93ec662e JD |
1679 | ret = metadata_stream_check_version(infd, stream); |
1680 | if (ret < 0) { | |
7b87473d MD |
1681 | err = kernctl_put_subbuf(infd); |
1682 | if (err != 0) { | |
1683 | if (err == -EFAULT) { | |
1684 | PERROR("Error in unreserving sub buffer\n"); | |
1685 | } else if (err == -EIO) { | |
1686 | /* Should never happen with newer LTTng versions */ | |
1687 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); | |
1688 | } | |
1689 | ret = err; | |
02d02e31 | 1690 | goto error; |
7b87473d | 1691 | } |
02d02e31 | 1692 | goto error; |
93ec662e | 1693 | } |
309167d2 JD |
1694 | } |
1695 | ||
ffe60014 | 1696 | switch (stream->chan->output) { |
07b86b52 | 1697 | case CONSUMER_CHANNEL_SPLICE: |
1d4dfdef DG |
1698 | /* |
1699 | * XXX: The lttng-modules splice "actor" does not handle copying | |
1700 | * partial pages hence only using the subbuffer size without the | |
1701 | * padding makes the splice fail. | |
1702 | */ | |
1703 | subbuf_size = len; | |
1704 | padding = 0; | |
1705 | ||
1706 | /* splice the subbuffer to the tracefile */ | |
91dfef6e | 1707 | ret = lttng_consumer_on_read_subbuffer_splice(ctx, stream, subbuf_size, |
309167d2 | 1708 | padding, &index); |
91dfef6e DG |
1709 | /* |
1710 | * XXX: Splice does not support network streaming so the return value | |
1711 | * is simply checked against subbuf_size and not like the mmap() op. | |
1712 | */ | |
1d4dfdef DG |
1713 | if (ret != subbuf_size) { |
1714 | /* | |
1715 | * display the error but continue processing to try | |
1716 | * to release the subbuffer | |
1717 | */ | |
1718 | ERR("Error splicing to tracefile (ret: %zd != len: %lu)", | |
1719 | ret, subbuf_size); | |
309167d2 | 1720 | write_index = 0; |
1d4dfdef DG |
1721 | } |
1722 | break; | |
07b86b52 | 1723 | case CONSUMER_CHANNEL_MMAP: |
128708c3 JG |
1724 | { |
1725 | const char *subbuf_addr; | |
fd424d99 | 1726 | struct lttng_buffer_view subbuf_view; |
128708c3 | 1727 | |
1d4dfdef DG |
1728 | /* Get subbuffer size without padding */ |
1729 | err = kernctl_get_subbuf_size(infd, &subbuf_size); | |
1730 | if (err != 0) { | |
5a510c9f | 1731 | PERROR("Getting sub-buffer len failed."); |
8265f19e MD |
1732 | err = kernctl_put_subbuf(infd); |
1733 | if (err != 0) { | |
32af2c95 | 1734 | if (err == -EFAULT) { |
5a510c9f | 1735 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1736 | } else if (err == -EIO) { |
8265f19e | 1737 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1738 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
8265f19e | 1739 | } |
32af2c95 | 1740 | ret = err; |
02d02e31 | 1741 | goto error; |
8265f19e | 1742 | } |
32af2c95 | 1743 | ret = err; |
02d02e31 | 1744 | goto error; |
1d4dfdef | 1745 | } |
47e81c02 | 1746 | |
128708c3 JG |
1747 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
1748 | if (ret) { | |
1749 | goto error_put_subbuf; | |
1750 | } | |
1751 | ||
1d4dfdef DG |
1752 | /* Make sure the tracer is not gone mad on us! */ |
1753 | assert(len >= subbuf_size); | |
1754 | ||
1755 | padding = len - subbuf_size; | |
1756 | ||
fd424d99 JG |
1757 | subbuf_view = lttng_buffer_view_init(subbuf_addr, 0, len); |
1758 | ||
1d4dfdef | 1759 | /* write the subbuffer to the tracefile */ |
fd424d99 JG |
1760 | ret = lttng_consumer_on_read_subbuffer_mmap( |
1761 | ctx, stream, &subbuf_view, padding, &index); | |
91dfef6e | 1762 | /* |
fd424d99 JG |
1763 | * The mmap operation should write subbuf_size amount of data |
1764 | * when network streaming or the full padding (len) size when we | |
1765 | * are _not_ streaming. | |
91dfef6e | 1766 | */ |
d88aee68 DG |
1767 | if ((ret != subbuf_size && stream->net_seq_idx != (uint64_t) -1ULL) || |
1768 | (ret != len && stream->net_seq_idx == (uint64_t) -1ULL)) { | |
1d4dfdef | 1769 | /* |
91dfef6e | 1770 | * Display the error but continue processing to try to release the |
2336629e DG |
1771 | * subbuffer. This is a DBG statement since this is possible to |
1772 | * happen without being a critical error. | |
1d4dfdef | 1773 | */ |
2336629e | 1774 | DBG("Error writing to tracefile " |
91dfef6e DG |
1775 | "(ret: %zd != len: %lu != subbuf_size: %lu)", |
1776 | ret, len, subbuf_size); | |
309167d2 | 1777 | write_index = 0; |
1d4dfdef DG |
1778 | } |
1779 | break; | |
128708c3 | 1780 | } |
1d4dfdef DG |
1781 | default: |
1782 | ERR("Unknown output method"); | |
56591bac | 1783 | ret = -EPERM; |
d41f73b7 | 1784 | } |
128708c3 | 1785 | error_put_subbuf: |
d41f73b7 MD |
1786 | err = kernctl_put_next_subbuf(infd); |
1787 | if (err != 0) { | |
32af2c95 | 1788 | if (err == -EFAULT) { |
5a510c9f | 1789 | PERROR("Error in unreserving sub buffer\n"); |
32af2c95 | 1790 | } else if (err == -EIO) { |
d41f73b7 | 1791 | /* Should never happen with newer LTTng versions */ |
5a510c9f | 1792 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted."); |
d41f73b7 | 1793 | } |
32af2c95 | 1794 | ret = err; |
02d02e31 | 1795 | goto error; |
d41f73b7 MD |
1796 | } |
1797 | ||
309167d2 | 1798 | /* Write index if needed. */ |
1c20f0e2 | 1799 | if (!write_index) { |
02d02e31 | 1800 | goto rotate; |
1c20f0e2 JD |
1801 | } |
1802 | ||
94d49140 JD |
1803 | if (stream->chan->live_timer_interval && !stream->metadata_flag) { |
1804 | /* | |
1805 | * In live, block until all the metadata is sent. | |
1806 | */ | |
c585821b MD |
1807 | pthread_mutex_lock(&stream->metadata_timer_lock); |
1808 | assert(!stream->missed_metadata_flush); | |
1809 | stream->waiting_on_metadata = true; | |
1810 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1811 | ||
94d49140 | 1812 | err = consumer_stream_sync_metadata(ctx, stream->session_id); |
c585821b MD |
1813 | |
1814 | pthread_mutex_lock(&stream->metadata_timer_lock); | |
1815 | stream->waiting_on_metadata = false; | |
1816 | if (stream->missed_metadata_flush) { | |
1817 | stream->missed_metadata_flush = false; | |
1818 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1819 | (void) consumer_flush_kernel_index(stream); | |
1820 | } else { | |
1821 | pthread_mutex_unlock(&stream->metadata_timer_lock); | |
1822 | } | |
94d49140 | 1823 | if (err < 0) { |
02d02e31 | 1824 | goto error; |
94d49140 JD |
1825 | } |
1826 | } | |
1827 | ||
1c20f0e2 JD |
1828 | err = consumer_stream_write_index(stream, &index); |
1829 | if (err < 0) { | |
02d02e31 | 1830 | goto error; |
309167d2 JD |
1831 | } |
1832 | ||
02d02e31 JD |
1833 | rotate: |
1834 | /* | |
1835 | * After extracting the packet, we check if the stream is now ready to be | |
1836 | * rotated and perform the action immediately. | |
1837 | */ | |
1838 | rotation_ret = lttng_consumer_stream_is_rotate_ready(stream); | |
1839 | if (rotation_ret == 1) { | |
d2956687 | 1840 | rotation_ret = lttng_consumer_rotate_stream(ctx, stream); |
02d02e31 JD |
1841 | if (rotation_ret < 0) { |
1842 | ERR("Stream rotation error"); | |
1843 | ret = -1; | |
1844 | goto error; | |
1845 | } | |
1846 | } else if (rotation_ret < 0) { | |
1847 | ERR("Checking if stream is ready to rotate"); | |
1848 | ret = -1; | |
1849 | goto error; | |
1850 | } | |
1851 | ||
1852 | error: | |
d41f73b7 MD |
1853 | return ret; |
1854 | } | |
1855 | ||
1856 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1857 | { | |
1858 | int ret; | |
ffe60014 DG |
1859 | |
1860 | assert(stream); | |
1861 | ||
2bba9e53 | 1862 | /* |
d2956687 JG |
1863 | * Don't create anything if this is set for streaming or if there is |
1864 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1865 | */ |
d2956687 JG |
1866 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
1867 | stream->chan->trace_chunk) { | |
1868 | ret = consumer_stream_create_output_files(stream, true); | |
1869 | if (ret) { | |
fe4477ee JD |
1870 | goto error; |
1871 | } | |
ffe60014 | 1872 | } |
d41f73b7 | 1873 | |
d41f73b7 MD |
1874 | if (stream->output == LTTNG_EVENT_MMAP) { |
1875 | /* get the len of the mmap region */ | |
1876 | unsigned long mmap_len; | |
1877 | ||
1878 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1879 | if (ret != 0) { | |
ffe60014 | 1880 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1881 | goto error_close_fd; |
1882 | } | |
1883 | stream->mmap_len = (size_t) mmap_len; | |
1884 | ||
ffe60014 DG |
1885 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1886 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1887 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1888 | PERROR("Error mmaping"); |
d41f73b7 MD |
1889 | ret = -1; |
1890 | goto error_close_fd; | |
1891 | } | |
1892 | } | |
1893 | ||
1894 | /* we return 0 to let the library handle the FD internally */ | |
1895 | return 0; | |
1896 | ||
1897 | error_close_fd: | |
2f225ce2 | 1898 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1899 | int err; |
1900 | ||
1901 | err = close(stream->out_fd); | |
1902 | assert(!err); | |
2f225ce2 | 1903 | stream->out_fd = -1; |
d41f73b7 MD |
1904 | } |
1905 | error: | |
1906 | return ret; | |
1907 | } | |
1908 | ||
ca22feea DG |
1909 | /* |
1910 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1911 | * stream. Consumer data lock MUST be acquired before calling this function |
1912 | * and the stream lock. | |
ca22feea | 1913 | * |
6d805429 | 1914 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1915 | * data is available for trace viewer reading. |
1916 | */ | |
6d805429 | 1917 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1918 | { |
1919 | int ret; | |
1920 | ||
1921 | assert(stream); | |
1922 | ||
873b9e9a MD |
1923 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1924 | ret = 0; | |
1925 | goto end; | |
1926 | } | |
1927 | ||
ca22feea DG |
1928 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1929 | if (ret == 0) { | |
1930 | /* There is still data so let's put back this subbuffer. */ | |
1931 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1932 | assert(ret == 0); | |
6d805429 | 1933 | ret = 1; /* Data is pending */ |
4e9a4686 | 1934 | goto end; |
ca22feea DG |
1935 | } |
1936 | ||
6d805429 DG |
1937 | /* Data is NOT pending and ready to be read. */ |
1938 | ret = 0; | |
ca22feea | 1939 | |
6efae65e DG |
1940 | end: |
1941 | return ret; | |
ca22feea | 1942 | } |