Commit | Line | Data |
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3bd1e081 MD |
1 | /* |
2 | * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca> | |
3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
3bd1e081 MD |
8 | * |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
3bd1e081 MD |
17 | */ |
18 | ||
6c1c0768 | 19 | #define _LGPL_SOURCE |
3bd1e081 | 20 | #include <assert.h> |
3bd1e081 MD |
21 | #include <poll.h> |
22 | #include <pthread.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <sys/mman.h> | |
26 | #include <sys/socket.h> | |
27 | #include <sys/types.h> | |
77c7c900 | 28 | #include <inttypes.h> |
3bd1e081 | 29 | #include <unistd.h> |
dbb5dfe6 | 30 | #include <sys/stat.h> |
3bd1e081 | 31 | |
51a9e1c7 | 32 | #include <bin/lttng-consumerd/health-consumerd.h> |
990570ed | 33 | #include <common/common.h> |
10a8a223 | 34 | #include <common/kernel-ctl/kernel-ctl.h> |
10a8a223 | 35 | #include <common/sessiond-comm/sessiond-comm.h> |
00e2e675 | 36 | #include <common/sessiond-comm/relayd.h> |
dbb5dfe6 | 37 | #include <common/compat/fcntl.h> |
f263b7fd | 38 | #include <common/compat/endian.h> |
acdb9057 | 39 | #include <common/pipe.h> |
00e2e675 | 40 | #include <common/relayd/relayd.h> |
fe4477ee | 41 | #include <common/utils.h> |
c8fea79c | 42 | #include <common/consumer/consumer-stream.h> |
309167d2 | 43 | #include <common/index/index.h> |
c8fea79c | 44 | #include <common/consumer/consumer-timer.h> |
29d1a7ae JG |
45 | #include <common/optional.h> |
46 | #include <common/buffer-view.h> | |
47 | #include <common/consumer/consumer.h> | |
48 | #include <stdint.h> | |
0857097f | 49 | |
10a8a223 | 50 | #include "kernel-consumer.h" |
3bd1e081 MD |
51 | |
52 | extern struct lttng_consumer_global_data consumer_data; | |
53 | extern int consumer_poll_timeout; | |
54 | extern volatile int consumer_quit; | |
55 | ||
3bd1e081 MD |
56 | /* |
57 | * Take a snapshot for a specific fd | |
58 | * | |
59 | * Returns 0 on success, < 0 on error | |
60 | */ | |
ffe60014 | 61 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
62 | { |
63 | int ret = 0; | |
64 | int infd = stream->wait_fd; | |
65 | ||
66 | ret = kernctl_snapshot(infd); | |
ee6bb36a JD |
67 | /* |
68 | * -EAGAIN is not an error, it just means that there is no data to | |
69 | * be read. | |
70 | */ | |
71 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 72 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
73 | } |
74 | ||
75 | return ret; | |
76 | } | |
77 | ||
78 | /* | |
79 | * Get the produced position | |
80 | * | |
81 | * Returns 0 on success, < 0 on error | |
82 | */ | |
ffe60014 | 83 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, |
3bd1e081 MD |
84 | unsigned long *pos) |
85 | { | |
86 | int ret; | |
87 | int infd = stream->wait_fd; | |
88 | ||
89 | ret = kernctl_snapshot_get_produced(infd, pos); | |
90 | if (ret != 0) { | |
5a510c9f | 91 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
92 | } |
93 | ||
94 | return ret; | |
95 | } | |
96 | ||
07b86b52 JD |
97 | /* |
98 | * Get the consumerd position | |
99 | * | |
100 | * Returns 0 on success, < 0 on error | |
101 | */ | |
102 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, | |
103 | unsigned long *pos) | |
104 | { | |
105 | int ret; | |
106 | int infd = stream->wait_fd; | |
107 | ||
108 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
109 | if (ret != 0) { | |
5a510c9f | 110 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
111 | } |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
1fdb9a78 JG |
116 | static |
117 | int get_current_subbuf_addr(struct lttng_consumer_stream *stream, | |
118 | const char **addr) | |
119 | { | |
120 | int ret; | |
121 | unsigned long mmap_offset; | |
122 | const char *mmap_base = stream->mmap_base; | |
123 | ||
124 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
125 | if (ret < 0) { | |
126 | PERROR("Failed to get mmap read offset"); | |
127 | goto error; | |
128 | } | |
129 | ||
130 | *addr = mmap_base + mmap_offset; | |
131 | error: | |
132 | return ret; | |
133 | } | |
134 | ||
07b86b52 JD |
135 | /* |
136 | * Take a snapshot of all the stream of a channel | |
137 | * | |
138 | * Returns 0 on success, < 0 on error | |
139 | */ | |
140 | int lttng_kconsumer_snapshot_channel(uint64_t key, char *path, | |
d07ceecd | 141 | uint64_t relayd_id, uint64_t nb_packets_per_stream, |
5c786ded | 142 | struct lttng_consumer_local_data *ctx) |
07b86b52 JD |
143 | { |
144 | int ret; | |
07b86b52 JD |
145 | struct lttng_consumer_channel *channel; |
146 | struct lttng_consumer_stream *stream; | |
147 | ||
6a00837f | 148 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 JD |
149 | |
150 | rcu_read_lock(); | |
151 | ||
152 | channel = consumer_find_channel(key); | |
153 | if (!channel) { | |
6a00837f | 154 | ERR("No channel found for key %" PRIu64, key); |
07b86b52 JD |
155 | ret = -1; |
156 | goto end; | |
157 | } | |
158 | ||
159 | /* Splice is not supported yet for channel snapshot. */ | |
160 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
161 | ERR("Unsupported output %d", channel->output); | |
162 | ret = -1; | |
163 | goto end; | |
164 | } | |
165 | ||
10a50311 | 166 | cds_list_for_each_entry(stream, &channel->streams.head, send_node) { |
923333cd | 167 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
168 | |
169 | health_code_update(); | |
170 | ||
07b86b52 JD |
171 | /* |
172 | * Lock stream because we are about to change its state. | |
173 | */ | |
174 | pthread_mutex_lock(&stream->lock); | |
175 | ||
29decac3 DG |
176 | /* |
177 | * Assign the received relayd ID so we can use it for streaming. The streams | |
178 | * are not visible to anyone so this is OK to change it. | |
179 | */ | |
6d40f8fa | 180 | stream->relayd_id = relayd_id; |
07b86b52 JD |
181 | channel->relayd_id = relayd_id; |
182 | if (relayd_id != (uint64_t) -1ULL) { | |
10a50311 | 183 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
184 | if (ret < 0) { |
185 | ERR("sending stream to relayd"); | |
186 | goto end_unlock; | |
187 | } | |
07b86b52 JD |
188 | } else { |
189 | ret = utils_create_stream_file(path, stream->name, | |
10a50311 JD |
190 | stream->chan->tracefile_size, |
191 | stream->tracefile_count_current, | |
309167d2 | 192 | stream->uid, stream->gid, NULL); |
07b86b52 JD |
193 | if (ret < 0) { |
194 | ERR("utils_create_stream_file"); | |
195 | goto end_unlock; | |
196 | } | |
197 | ||
198 | stream->out_fd = ret; | |
199 | stream->tracefile_size_current = 0; | |
200 | ||
81ea21bf MD |
201 | DBG("Kernel consumer snapshot stream %s/%s (%" PRIu64 ")", |
202 | path, stream->name, stream->key); | |
07b86b52 | 203 | } |
601262d6 JD |
204 | if (relayd_id != -1ULL) { |
205 | ret = consumer_send_relayd_streams_sent(relayd_id); | |
206 | if (ret < 0) { | |
207 | ERR("sending streams sent to relayd"); | |
208 | goto end_unlock; | |
209 | } | |
b7fa98e6 | 210 | channel->streams_sent_to_relayd = true; |
a4baae1b | 211 | } |
07b86b52 | 212 | |
612b8ed8 | 213 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 214 | if (ret < 0) { |
612b8ed8 MD |
215 | /* |
216 | * Doing a buffer flush which does not take into | |
217 | * account empty packets. This is not perfect | |
218 | * for stream intersection, but required as a | |
219 | * fall-back when "flush_empty" is not | |
220 | * implemented by lttng-modules. | |
221 | */ | |
222 | ret = kernctl_buffer_flush(stream->wait_fd); | |
223 | if (ret < 0) { | |
224 | ERR("Failed to flush kernel stream"); | |
225 | goto end_unlock; | |
226 | } | |
07b86b52 JD |
227 | goto end_unlock; |
228 | } | |
229 | ||
230 | ret = lttng_kconsumer_take_snapshot(stream); | |
231 | if (ret < 0) { | |
232 | ERR("Taking kernel snapshot"); | |
233 | goto end_unlock; | |
234 | } | |
235 | ||
236 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
237 | if (ret < 0) { | |
238 | ERR("Produced kernel snapshot position"); | |
239 | goto end_unlock; | |
240 | } | |
241 | ||
242 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
243 | if (ret < 0) { | |
244 | ERR("Consumerd kernel snapshot position"); | |
245 | goto end_unlock; | |
246 | } | |
247 | ||
248 | if (stream->max_sb_size == 0) { | |
249 | ret = kernctl_get_max_subbuf_size(stream->wait_fd, | |
250 | &stream->max_sb_size); | |
251 | if (ret < 0) { | |
252 | ERR("Getting kernel max_sb_size"); | |
253 | goto end_unlock; | |
254 | } | |
255 | } | |
256 | ||
d07ceecd MD |
257 | consumed_pos = consumer_get_consume_start_pos(consumed_pos, |
258 | produced_pos, nb_packets_per_stream, | |
259 | stream->max_sb_size); | |
5c786ded | 260 | |
07b86b52 JD |
261 | while (consumed_pos < produced_pos) { |
262 | ssize_t read_len; | |
263 | unsigned long len, padded_len; | |
1fdb9a78 | 264 | const char *subbuf_addr; |
ace0e591 | 265 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 266 | |
9ce5646a | 267 | health_code_update(); |
07b86b52 JD |
268 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
269 | ||
270 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
271 | if (ret < 0) { | |
32af2c95 | 272 | if (ret != -EAGAIN) { |
07b86b52 JD |
273 | PERROR("kernctl_get_subbuf snapshot"); |
274 | goto end_unlock; | |
275 | } | |
276 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
277 | consumed_pos += stream->max_sb_size; | |
6e1f2e92 | 278 | stream->chan->lost_packets++; |
07b86b52 JD |
279 | continue; |
280 | } | |
281 | ||
282 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); | |
283 | if (ret < 0) { | |
284 | ERR("Snapshot kernctl_get_subbuf_size"); | |
29decac3 | 285 | goto error_put_subbuf; |
07b86b52 JD |
286 | } |
287 | ||
288 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
289 | if (ret < 0) { | |
290 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
29decac3 | 291 | goto error_put_subbuf; |
07b86b52 JD |
292 | } |
293 | ||
1fdb9a78 JG |
294 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
295 | if (ret) { | |
296 | goto error_put_subbuf; | |
297 | } | |
298 | ||
ace0e591 JG |
299 | subbuf_view = lttng_buffer_view_init( |
300 | subbuf_addr, 0, padded_len); | |
1fdb9a78 | 301 | read_len = lttng_consumer_on_read_subbuffer_mmap(ctx, |
ace0e591 | 302 | stream, &subbuf_view, |
29d1a7ae | 303 | padded_len - len); |
07b86b52 | 304 | /* |
29decac3 DG |
305 | * We write the padded len in local tracefiles but the data len |
306 | * when using a relay. Display the error but continue processing | |
307 | * to try to release the subbuffer. | |
07b86b52 JD |
308 | */ |
309 | if (relayd_id != (uint64_t) -1ULL) { | |
310 | if (read_len != len) { | |
311 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
312 | read_len, len); | |
313 | } | |
314 | } else { | |
315 | if (read_len != padded_len) { | |
316 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
317 | read_len, padded_len); | |
318 | } | |
319 | } | |
320 | ||
321 | ret = kernctl_put_subbuf(stream->wait_fd); | |
322 | if (ret < 0) { | |
323 | ERR("Snapshot kernctl_put_subbuf"); | |
324 | goto end_unlock; | |
325 | } | |
326 | consumed_pos += stream->max_sb_size; | |
327 | } | |
328 | ||
329 | if (relayd_id == (uint64_t) -1ULL) { | |
fdf9986c MD |
330 | if (stream->out_fd >= 0) { |
331 | ret = close(stream->out_fd); | |
332 | if (ret < 0) { | |
333 | PERROR("Kernel consumer snapshot close out_fd"); | |
334 | goto end_unlock; | |
335 | } | |
336 | stream->out_fd = -1; | |
07b86b52 | 337 | } |
07b86b52 JD |
338 | } else { |
339 | close_relayd_stream(stream); | |
6d40f8fa | 340 | stream->relayd_id = (uint64_t) -1ULL; |
07b86b52 JD |
341 | } |
342 | pthread_mutex_unlock(&stream->lock); | |
343 | } | |
344 | ||
345 | /* All good! */ | |
346 | ret = 0; | |
347 | goto end; | |
348 | ||
29decac3 DG |
349 | error_put_subbuf: |
350 | ret = kernctl_put_subbuf(stream->wait_fd); | |
351 | if (ret < 0) { | |
352 | ERR("Snapshot kernctl_put_subbuf error path"); | |
353 | } | |
07b86b52 JD |
354 | end_unlock: |
355 | pthread_mutex_unlock(&stream->lock); | |
356 | end: | |
357 | rcu_read_unlock(); | |
358 | return ret; | |
359 | } | |
360 | ||
361 | /* | |
362 | * Read the whole metadata available for a snapshot. | |
363 | * | |
364 | * Returns 0 on success, < 0 on error | |
365 | */ | |
a34de389 | 366 | static int lttng_kconsumer_snapshot_metadata(uint64_t key, char *path, |
e2039c7a | 367 | uint64_t relayd_id, struct lttng_consumer_local_data *ctx) |
07b86b52 | 368 | { |
d771f832 DG |
369 | int ret, use_relayd = 0; |
370 | ssize_t ret_read; | |
07b86b52 JD |
371 | struct lttng_consumer_channel *metadata_channel; |
372 | struct lttng_consumer_stream *metadata_stream; | |
d771f832 DG |
373 | |
374 | assert(ctx); | |
07b86b52 JD |
375 | |
376 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", | |
377 | key, path); | |
378 | ||
379 | rcu_read_lock(); | |
380 | ||
381 | metadata_channel = consumer_find_channel(key); | |
382 | if (!metadata_channel) { | |
d771f832 | 383 | ERR("Kernel snapshot metadata not found for key %" PRIu64, key); |
07b86b52 | 384 | ret = -1; |
a34de389 | 385 | goto error_no_channel; |
07b86b52 JD |
386 | } |
387 | ||
388 | metadata_stream = metadata_channel->metadata_stream; | |
389 | assert(metadata_stream); | |
a34de389 | 390 | pthread_mutex_lock(&metadata_stream->lock); |
07b86b52 | 391 | |
d771f832 | 392 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 393 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
394 | use_relayd = 1; |
395 | } | |
396 | ||
397 | if (use_relayd) { | |
10a50311 | 398 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 399 | if (ret < 0) { |
a34de389 | 400 | goto error_snapshot; |
e2039c7a | 401 | } |
e2039c7a JD |
402 | } else { |
403 | ret = utils_create_stream_file(path, metadata_stream->name, | |
404 | metadata_stream->chan->tracefile_size, | |
405 | metadata_stream->tracefile_count_current, | |
309167d2 | 406 | metadata_stream->uid, metadata_stream->gid, NULL); |
e2039c7a | 407 | if (ret < 0) { |
a34de389 | 408 | goto error_snapshot; |
e2039c7a JD |
409 | } |
410 | metadata_stream->out_fd = ret; | |
07b86b52 | 411 | } |
07b86b52 | 412 | |
d771f832 | 413 | do { |
9ce5646a MD |
414 | health_code_update(); |
415 | ||
29d1a7ae | 416 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 417 | if (ret_read < 0) { |
56591bac | 418 | if (ret_read != -EAGAIN) { |
6a00837f | 419 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", |
d771f832 | 420 | ret_read); |
a34de389 JG |
421 | ret = ret_read; |
422 | goto error_snapshot; | |
07b86b52 | 423 | } |
d771f832 | 424 | /* ret_read is negative at this point so we will exit the loop. */ |
07b86b52 JD |
425 | continue; |
426 | } | |
d771f832 | 427 | } while (ret_read >= 0); |
07b86b52 | 428 | |
d771f832 DG |
429 | if (use_relayd) { |
430 | close_relayd_stream(metadata_stream); | |
6d40f8fa | 431 | metadata_stream->relayd_id = (uint64_t) -1ULL; |
d771f832 | 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; | |
e2039c7a | 443 | } |
e2039c7a JD |
444 | } |
445 | ||
07b86b52 | 446 | ret = 0; |
a34de389 JG |
447 | error_snapshot: |
448 | pthread_mutex_unlock(&metadata_stream->lock); | |
cf53a8a6 JD |
449 | cds_list_del(&metadata_stream->send_node); |
450 | consumer_stream_destroy(metadata_stream, NULL); | |
451 | metadata_channel->metadata_stream = NULL; | |
a34de389 | 452 | error_no_channel: |
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 | { | |
465 | ssize_t ret; | |
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 | ||
3bd1e081 MD |
471 | ret = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); |
472 | if (ret != sizeof(msg)) { | |
1803a064 | 473 | if (ret > 0) { |
c6857fcf | 474 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
1803a064 MD |
475 | ret = -1; |
476 | } | |
3bd1e081 MD |
477 | return ret; |
478 | } | |
9ce5646a MD |
479 | |
480 | health_code_update(); | |
481 | ||
84382d49 MD |
482 | /* Deprecated command */ |
483 | assert(msg.cmd_type != LTTNG_CONSUMER_STOP); | |
3bd1e081 | 484 | |
9ce5646a MD |
485 | health_code_update(); |
486 | ||
b0b335c8 MD |
487 | /* relayd needs RCU read-side protection */ |
488 | rcu_read_lock(); | |
489 | ||
3bd1e081 | 490 | switch (msg.cmd_type) { |
00e2e675 DG |
491 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
492 | { | |
f50f23d9 | 493 | /* Session daemon status message are handled in the following call. */ |
028ba707 | 494 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
7735ef9e | 495 | msg.u.relayd_sock.type, ctx, sock, consumer_sockpoll, |
d3e2ba59 | 496 | &msg.u.relayd_sock.sock, msg.u.relayd_sock.session_id, |
028ba707 | 497 | msg.u.relayd_sock.relayd_session_id); |
00e2e675 DG |
498 | goto end_nosignal; |
499 | } | |
3bd1e081 MD |
500 | case LTTNG_CONSUMER_ADD_CHANNEL: |
501 | { | |
502 | struct lttng_consumer_channel *new_channel; | |
e43c41c5 | 503 | int ret_recv; |
3bd1e081 | 504 | |
9ce5646a MD |
505 | health_code_update(); |
506 | ||
f50f23d9 DG |
507 | /* First send a status message before receiving the fds. */ |
508 | ret = consumer_send_status_msg(sock, ret_code); | |
509 | if (ret < 0) { | |
510 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 511 | goto error_fatal; |
f50f23d9 | 512 | } |
9ce5646a MD |
513 | |
514 | health_code_update(); | |
515 | ||
d88aee68 | 516 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
3bd1e081 | 517 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
ffe60014 DG |
518 | msg.u.channel.session_id, msg.u.channel.pathname, |
519 | msg.u.channel.name, msg.u.channel.uid, msg.u.channel.gid, | |
1624d5b7 JD |
520 | msg.u.channel.relayd_id, msg.u.channel.output, |
521 | msg.u.channel.tracefile_size, | |
1950109e | 522 | msg.u.channel.tracefile_count, 0, |
ecc48a90 | 523 | msg.u.channel.monitor, |
d7ba1388 | 524 | msg.u.channel.live_timer_interval, |
11785f65 | 525 | msg.u.channel.is_live, |
3d071855 | 526 | NULL, NULL); |
3bd1e081 | 527 | if (new_channel == NULL) { |
f73fabfd | 528 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
529 | goto end_nosignal; |
530 | } | |
ffe60014 | 531 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
532 | switch (msg.u.channel.output) { |
533 | case LTTNG_EVENT_SPLICE: | |
534 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
535 | break; | |
536 | case LTTNG_EVENT_MMAP: | |
537 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
538 | break; | |
539 | default: | |
540 | ERR("Channel output unknown %d", msg.u.channel.output); | |
541 | goto end_nosignal; | |
542 | } | |
ffe60014 DG |
543 | |
544 | /* Translate and save channel type. */ | |
545 | switch (msg.u.channel.type) { | |
546 | case CONSUMER_CHANNEL_TYPE_DATA: | |
547 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
548 | new_channel->type = msg.u.channel.type; | |
549 | break; | |
550 | default: | |
551 | assert(0); | |
552 | goto end_nosignal; | |
553 | }; | |
554 | ||
9ce5646a MD |
555 | health_code_update(); |
556 | ||
3bd1e081 | 557 | if (ctx->on_recv_channel != NULL) { |
e43c41c5 JD |
558 | ret_recv = ctx->on_recv_channel(new_channel); |
559 | if (ret_recv == 0) { | |
560 | ret = consumer_add_channel(new_channel, ctx); | |
561 | } else if (ret_recv < 0) { | |
3bd1e081 MD |
562 | goto end_nosignal; |
563 | } | |
564 | } else { | |
e43c41c5 | 565 | ret = consumer_add_channel(new_channel, ctx); |
3bd1e081 | 566 | } |
94d49140 JD |
567 | if (CONSUMER_CHANNEL_TYPE_DATA) { |
568 | consumer_timer_live_start(new_channel, | |
569 | msg.u.channel.live_timer_interval); | |
570 | } | |
e43c41c5 | 571 | |
9ce5646a MD |
572 | health_code_update(); |
573 | ||
e43c41c5 | 574 | /* If we received an error in add_channel, we need to report it. */ |
821fffb2 | 575 | if (ret < 0) { |
1803a064 MD |
576 | ret = consumer_send_status_msg(sock, ret); |
577 | if (ret < 0) { | |
578 | goto error_fatal; | |
579 | } | |
e43c41c5 JD |
580 | goto end_nosignal; |
581 | } | |
582 | ||
3bd1e081 MD |
583 | goto end_nosignal; |
584 | } | |
585 | case LTTNG_CONSUMER_ADD_STREAM: | |
586 | { | |
dae10966 DG |
587 | int fd; |
588 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 589 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 590 | struct lttng_consumer_channel *channel; |
c80048c6 | 591 | int alloc_ret = 0; |
3bd1e081 | 592 | |
ffe60014 DG |
593 | /* |
594 | * Get stream's channel reference. Needed when adding the stream to the | |
595 | * global hash table. | |
596 | */ | |
597 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
598 | if (!channel) { | |
599 | /* | |
600 | * We could not find the channel. Can happen if cpu hotplug | |
601 | * happens while tearing down. | |
602 | */ | |
d88aee68 | 603 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 604 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
605 | } |
606 | ||
9ce5646a MD |
607 | health_code_update(); |
608 | ||
f50f23d9 DG |
609 | /* First send a status message before receiving the fds. */ |
610 | ret = consumer_send_status_msg(sock, ret_code); | |
1803a064 | 611 | if (ret < 0) { |
d771f832 | 612 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 MD |
613 | goto error_fatal; |
614 | } | |
9ce5646a MD |
615 | |
616 | health_code_update(); | |
617 | ||
0c759fc9 | 618 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 619 | /* Channel was not found. */ |
f50f23d9 DG |
620 | goto end_nosignal; |
621 | } | |
622 | ||
d771f832 | 623 | /* Blocking call */ |
9ce5646a MD |
624 | health_poll_entry(); |
625 | ret = lttng_consumer_poll_socket(consumer_sockpoll); | |
626 | health_poll_exit(); | |
84382d49 MD |
627 | if (ret) { |
628 | goto error_fatal; | |
3bd1e081 | 629 | } |
00e2e675 | 630 | |
9ce5646a MD |
631 | health_code_update(); |
632 | ||
00e2e675 | 633 | /* Get stream file descriptor from socket */ |
f2fc6720 MD |
634 | ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
635 | if (ret != sizeof(fd)) { | |
f73fabfd | 636 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
3f8e211f | 637 | rcu_read_unlock(); |
3bd1e081 MD |
638 | return ret; |
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. */ | |
651 | goto end_nosignal; | |
652 | } | |
653 | ||
9ce5646a MD |
654 | health_code_update(); |
655 | ||
59db0d42 | 656 | pthread_mutex_lock(&channel->lock); |
29d1a7ae | 657 | new_stream = consumer_stream_create( |
59db0d42 JG |
658 | channel, |
659 | channel->key, | |
ffe60014 DG |
660 | fd, |
661 | LTTNG_CONSUMER_ACTIVE_STREAM, | |
662 | channel->name, | |
663 | channel->uid, | |
664 | channel->gid, | |
665 | channel->relayd_id, | |
666 | channel->session_id, | |
667 | msg.u.stream.cpu, | |
668 | &alloc_ret, | |
4891ece8 DG |
669 | channel->type, |
670 | channel->monitor); | |
3bd1e081 | 671 | if (new_stream == NULL) { |
c80048c6 MD |
672 | switch (alloc_ret) { |
673 | case -ENOMEM: | |
674 | case -EINVAL: | |
675 | default: | |
676 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
677 | break; | |
c80048c6 | 678 | } |
59db0d42 | 679 | pthread_mutex_unlock(&channel->lock); |
3f8e211f | 680 | goto end_nosignal; |
3bd1e081 | 681 | } |
d771f832 | 682 | |
ffe60014 | 683 | new_stream->wait_fd = fd; |
29d1a7ae JG |
684 | ret = kernctl_get_max_subbuf_size(new_stream->wait_fd, |
685 | &new_stream->max_sb_size); | |
686 | if (ret < 0) { | |
687 | pthread_mutex_unlock(&channel->lock); | |
688 | ERR("Failed to get kernel maximal subbuffer size"); | |
07b86b52 JD |
689 | goto end_nosignal; |
690 | } | |
00e2e675 | 691 | |
a0c83db9 DG |
692 | /* |
693 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
694 | * refcount right now. We don't need to increment the refcount for |
695 | * streams in no monitor because we handle manually the cleanup of | |
696 | * those. It is very important to make sure there is NO prior | |
697 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 698 | */ |
07b86b52 JD |
699 | if (channel->monitor) { |
700 | uatomic_inc(&new_stream->chan->refcount); | |
701 | } | |
9d9353f9 | 702 | |
fb3a43a9 DG |
703 | /* |
704 | * The buffer flush is done on the session daemon side for the kernel | |
705 | * so no need for the stream "hangup_flush_done" variable to be | |
706 | * tracked. This is important for a kernel stream since we don't rely | |
707 | * on the flush state of the stream to read data. It's not the case for | |
708 | * user space tracing. | |
709 | */ | |
710 | new_stream->hangup_flush_done = 0; | |
711 | ||
9ce5646a MD |
712 | health_code_update(); |
713 | ||
633d0084 DG |
714 | if (ctx->on_recv_stream) { |
715 | ret = ctx->on_recv_stream(new_stream); | |
716 | if (ret < 0) { | |
d771f832 | 717 | consumer_stream_free(new_stream); |
633d0084 | 718 | goto end_nosignal; |
fb3a43a9 | 719 | } |
633d0084 | 720 | } |
fb3a43a9 | 721 | |
9ce5646a MD |
722 | health_code_update(); |
723 | ||
07b86b52 JD |
724 | if (new_stream->metadata_flag) { |
725 | channel->metadata_stream = new_stream; | |
726 | } | |
727 | ||
2bba9e53 DG |
728 | /* Do not monitor this stream. */ |
729 | if (!channel->monitor) { | |
5eecee74 | 730 | DBG("Kernel consumer add stream %s in no monitor mode with " |
6dc3064a | 731 | "relayd id %" PRIu64, new_stream->name, |
6d40f8fa | 732 | new_stream->relayd_id); |
10a50311 | 733 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
59db0d42 | 734 | pthread_mutex_unlock(&channel->lock); |
6dc3064a DG |
735 | break; |
736 | } | |
737 | ||
e1b71bdc | 738 | /* Send stream to relayd if the stream has an ID. */ |
6d40f8fa | 739 | if (new_stream->relayd_id != (uint64_t) -1ULL) { |
194ee077 DG |
740 | ret = consumer_send_relayd_stream(new_stream, |
741 | new_stream->chan->pathname); | |
e1b71bdc | 742 | if (ret < 0) { |
59db0d42 | 743 | pthread_mutex_unlock(&channel->lock); |
e1b71bdc DG |
744 | consumer_stream_free(new_stream); |
745 | goto end_nosignal; | |
746 | } | |
b7fa98e6 MD |
747 | |
748 | /* | |
749 | * If adding an extra stream to an already | |
750 | * existing channel (e.g. cpu hotplug), we need | |
751 | * to send the "streams_sent" command to relayd. | |
752 | */ | |
753 | if (channel->streams_sent_to_relayd) { | |
754 | ret = consumer_send_relayd_streams_sent( | |
6d40f8fa | 755 | new_stream->relayd_id); |
b7fa98e6 | 756 | if (ret < 0) { |
59db0d42 | 757 | pthread_mutex_unlock(&channel->lock); |
b7fa98e6 MD |
758 | goto end_nosignal; |
759 | } | |
760 | } | |
e2039c7a | 761 | } |
59db0d42 | 762 | pthread_mutex_unlock(&channel->lock); |
e2039c7a | 763 | |
50f8ae69 | 764 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 765 | if (new_stream->metadata_flag) { |
5ab66908 MD |
766 | ret = consumer_add_metadata_stream(new_stream); |
767 | if (ret) { | |
768 | ERR("Consumer add metadata stream %" PRIu64 " failed. Continuing", | |
769 | new_stream->key); | |
770 | consumer_stream_free(new_stream); | |
771 | goto end_nosignal; | |
772 | } | |
dae10966 | 773 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 774 | } else { |
5ab66908 MD |
775 | ret = consumer_add_data_stream(new_stream); |
776 | if (ret) { | |
777 | ERR("Consumer add stream %" PRIu64 " failed. Continuing", | |
778 | new_stream->key); | |
779 | consumer_stream_free(new_stream); | |
780 | goto end_nosignal; | |
781 | } | |
dae10966 | 782 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
783 | } |
784 | ||
5ab66908 MD |
785 | /* Vitible to other threads */ |
786 | new_stream->globally_visible = 1; | |
787 | ||
9ce5646a MD |
788 | health_code_update(); |
789 | ||
dae10966 | 790 | ret = lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream)); |
50f8ae69 | 791 | if (ret < 0) { |
dae10966 | 792 | ERR("Consumer write %s stream to pipe %d", |
50f8ae69 | 793 | new_stream->metadata_flag ? "metadata" : "data", |
dae10966 | 794 | lttng_pipe_get_writefd(stream_pipe)); |
5ab66908 MD |
795 | if (new_stream->metadata_flag) { |
796 | consumer_del_stream_for_metadata(new_stream); | |
797 | } else { | |
798 | consumer_del_stream_for_data(new_stream); | |
799 | } | |
50f8ae69 | 800 | goto end_nosignal; |
3bd1e081 | 801 | } |
00e2e675 | 802 | |
50f8ae69 | 803 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) with relayd id %" PRIu64, |
ffe60014 | 804 | new_stream->name, fd, new_stream->relayd_stream_id); |
3bd1e081 MD |
805 | break; |
806 | } | |
a4baae1b JD |
807 | case LTTNG_CONSUMER_STREAMS_SENT: |
808 | { | |
809 | struct lttng_consumer_channel *channel; | |
810 | ||
811 | /* | |
812 | * Get stream's channel reference. Needed when adding the stream to the | |
813 | * global hash table. | |
814 | */ | |
815 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
816 | if (!channel) { | |
817 | /* | |
818 | * We could not find the channel. Can happen if cpu hotplug | |
819 | * happens while tearing down. | |
820 | */ | |
821 | ERR("Unable to find channel key %" PRIu64, | |
822 | msg.u.sent_streams.channel_key); | |
e462382a | 823 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
824 | } |
825 | ||
826 | health_code_update(); | |
827 | ||
828 | /* | |
829 | * Send status code to session daemon. | |
830 | */ | |
831 | ret = consumer_send_status_msg(sock, ret_code); | |
f261ad0a | 832 | if (ret < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
a4baae1b JD |
833 | /* Somehow, the session daemon is not responding anymore. */ |
834 | goto end_nosignal; | |
835 | } | |
836 | ||
837 | health_code_update(); | |
838 | ||
839 | /* | |
840 | * We should not send this message if we don't monitor the | |
841 | * streams in this channel. | |
842 | */ | |
843 | if (!channel->monitor) { | |
844 | break; | |
845 | } | |
846 | ||
847 | health_code_update(); | |
848 | /* Send stream to relayd if the stream has an ID. */ | |
849 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
850 | ret = consumer_send_relayd_streams_sent( | |
851 | msg.u.sent_streams.net_seq_idx); | |
852 | if (ret < 0) { | |
853 | goto end_nosignal; | |
854 | } | |
b7fa98e6 | 855 | channel->streams_sent_to_relayd = true; |
a4baae1b JD |
856 | } |
857 | break; | |
858 | } | |
3bd1e081 MD |
859 | case LTTNG_CONSUMER_UPDATE_STREAM: |
860 | { | |
3f8e211f DG |
861 | rcu_read_unlock(); |
862 | return -ENOSYS; | |
863 | } | |
864 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
865 | { | |
a6ba4fe1 | 866 | uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f DG |
867 | struct consumer_relayd_sock_pair *relayd; |
868 | ||
a6ba4fe1 | 869 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
870 | |
871 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 872 | relayd = consumer_find_relayd(index); |
3f8e211f | 873 | if (relayd == NULL) { |
3448e266 | 874 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 875 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 876 | } |
3f8e211f | 877 | |
a6ba4fe1 DG |
878 | /* |
879 | * Each relayd socket pair has a refcount of stream attached to it | |
880 | * which tells if the relayd is still active or not depending on the | |
881 | * refcount value. | |
882 | * | |
883 | * This will set the destroy flag of the relayd object and destroy it | |
884 | * if the refcount reaches zero when called. | |
885 | * | |
886 | * The destroy can happen either here or when a stream fd hangs up. | |
887 | */ | |
f50f23d9 DG |
888 | if (relayd) { |
889 | consumer_flag_relayd_for_destroy(relayd); | |
890 | } | |
891 | ||
9ce5646a MD |
892 | health_code_update(); |
893 | ||
f50f23d9 DG |
894 | ret = consumer_send_status_msg(sock, ret_code); |
895 | if (ret < 0) { | |
896 | /* Somehow, the session daemon is not responding anymore. */ | |
1803a064 | 897 | goto error_fatal; |
f50f23d9 | 898 | } |
3f8e211f | 899 | |
3f8e211f | 900 | goto end_nosignal; |
3bd1e081 | 901 | } |
6d805429 | 902 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 903 | { |
c8f59ee5 | 904 | int32_t ret; |
6d805429 | 905 | uint64_t id = msg.u.data_pending.session_id; |
c8f59ee5 | 906 | |
6d805429 | 907 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 908 | |
6d805429 | 909 | ret = consumer_data_pending(id); |
c8f59ee5 | 910 | |
9ce5646a MD |
911 | health_code_update(); |
912 | ||
c8f59ee5 DG |
913 | /* Send back returned value to session daemon */ |
914 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
915 | if (ret < 0) { | |
6d805429 | 916 | PERROR("send data pending ret code"); |
1803a064 | 917 | goto error_fatal; |
c8f59ee5 | 918 | } |
f50f23d9 DG |
919 | |
920 | /* | |
921 | * No need to send back a status message since the data pending | |
922 | * returned value is the response. | |
923 | */ | |
c8f59ee5 | 924 | break; |
53632229 | 925 | } |
6dc3064a DG |
926 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
927 | { | |
07b86b52 JD |
928 | if (msg.u.snapshot_channel.metadata == 1) { |
929 | ret = lttng_kconsumer_snapshot_metadata(msg.u.snapshot_channel.key, | |
e2039c7a JD |
930 | msg.u.snapshot_channel.pathname, |
931 | msg.u.snapshot_channel.relayd_id, ctx); | |
07b86b52 JD |
932 | if (ret < 0) { |
933 | ERR("Snapshot metadata failed"); | |
e462382a | 934 | ret_code = LTTCOMM_CONSUMERD_ERROR_METADATA; |
07b86b52 JD |
935 | } |
936 | } else { | |
937 | ret = lttng_kconsumer_snapshot_channel(msg.u.snapshot_channel.key, | |
938 | msg.u.snapshot_channel.pathname, | |
5c786ded | 939 | msg.u.snapshot_channel.relayd_id, |
d07ceecd | 940 | msg.u.snapshot_channel.nb_packets_per_stream, |
5c786ded | 941 | ctx); |
07b86b52 JD |
942 | if (ret < 0) { |
943 | ERR("Snapshot channel failed"); | |
e462382a | 944 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
945 | } |
946 | } | |
947 | ||
9ce5646a MD |
948 | health_code_update(); |
949 | ||
6dc3064a DG |
950 | ret = consumer_send_status_msg(sock, ret_code); |
951 | if (ret < 0) { | |
952 | /* Somehow, the session daemon is not responding anymore. */ | |
953 | goto end_nosignal; | |
954 | } | |
955 | break; | |
956 | } | |
07b86b52 JD |
957 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
958 | { | |
959 | uint64_t key = msg.u.destroy_channel.key; | |
960 | struct lttng_consumer_channel *channel; | |
961 | ||
962 | channel = consumer_find_channel(key); | |
963 | if (!channel) { | |
964 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 965 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
966 | } |
967 | ||
9ce5646a MD |
968 | health_code_update(); |
969 | ||
07b86b52 JD |
970 | ret = consumer_send_status_msg(sock, ret_code); |
971 | if (ret < 0) { | |
972 | /* Somehow, the session daemon is not responding anymore. */ | |
973 | goto end_nosignal; | |
974 | } | |
975 | ||
9ce5646a MD |
976 | health_code_update(); |
977 | ||
15dc512a DG |
978 | /* Stop right now if no channel was found. */ |
979 | if (!channel) { | |
980 | goto end_nosignal; | |
981 | } | |
982 | ||
07b86b52 JD |
983 | /* |
984 | * This command should ONLY be issued for channel with streams set in | |
985 | * no monitor mode. | |
986 | */ | |
987 | assert(!channel->monitor); | |
988 | ||
989 | /* | |
990 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
991 | * monitor mode. | |
992 | */ | |
993 | assert(!uatomic_sub_return(&channel->refcount, 1)); | |
994 | ||
995 | consumer_del_channel(channel); | |
996 | ||
997 | goto end_nosignal; | |
998 | } | |
fb83fe64 JD |
999 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1000 | { | |
1001 | uint64_t ret; | |
1002 | struct lttng_consumer_channel *channel; | |
1003 | uint64_t id = msg.u.discarded_events.session_id; | |
1004 | uint64_t key = msg.u.discarded_events.channel_key; | |
1005 | ||
e5742757 MD |
1006 | DBG("Kernel consumer discarded events command for session id %" |
1007 | PRIu64 ", channel key %" PRIu64, id, key); | |
1008 | ||
fb83fe64 JD |
1009 | channel = consumer_find_channel(key); |
1010 | if (!channel) { | |
1011 | ERR("Kernel consumer discarded events channel %" | |
1012 | PRIu64 " not found", key); | |
e5742757 MD |
1013 | ret = 0; |
1014 | } else { | |
1015 | ret = channel->discarded_events; | |
fb83fe64 JD |
1016 | } |
1017 | ||
fb83fe64 JD |
1018 | health_code_update(); |
1019 | ||
1020 | /* Send back returned value to session daemon */ | |
1021 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
1022 | if (ret < 0) { | |
1023 | PERROR("send discarded events"); | |
1024 | goto error_fatal; | |
1025 | } | |
1026 | ||
1027 | break; | |
1028 | } | |
1029 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1030 | { | |
1031 | uint64_t ret; | |
1032 | struct lttng_consumer_channel *channel; | |
1033 | uint64_t id = msg.u.lost_packets.session_id; | |
1034 | uint64_t key = msg.u.lost_packets.channel_key; | |
1035 | ||
e5742757 MD |
1036 | DBG("Kernel consumer lost packets 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 lost packets channel %" | |
1042 | PRIu64 " not found", key); | |
e5742757 MD |
1043 | ret = 0; |
1044 | } else { | |
1045 | ret = channel->lost_packets; | |
fb83fe64 JD |
1046 | } |
1047 | ||
fb83fe64 JD |
1048 | health_code_update(); |
1049 | ||
1050 | /* Send back returned value to session daemon */ | |
1051 | ret = lttcomm_send_unix_sock(sock, &ret, sizeof(ret)); | |
1052 | if (ret < 0) { | |
1053 | PERROR("send lost packets"); | |
1054 | goto error_fatal; | |
1055 | } | |
1056 | ||
1057 | break; | |
1058 | } | |
3bd1e081 | 1059 | default: |
3f8e211f | 1060 | goto end_nosignal; |
3bd1e081 | 1061 | } |
3f8e211f | 1062 | |
3bd1e081 | 1063 | end_nosignal: |
b0b335c8 | 1064 | rcu_read_unlock(); |
4cbc1a04 DG |
1065 | |
1066 | /* | |
1067 | * Return 1 to indicate success since the 0 value can be a socket | |
1068 | * shutdown during the recv() or send() call. | |
1069 | */ | |
9ce5646a | 1070 | health_code_update(); |
4cbc1a04 | 1071 | return 1; |
1803a064 MD |
1072 | |
1073 | error_fatal: | |
1074 | rcu_read_unlock(); | |
1075 | /* This will issue a consumer stop. */ | |
1076 | return -1; | |
3bd1e081 | 1077 | } |
d41f73b7 | 1078 | |
94d49140 JD |
1079 | /* |
1080 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1081 | * metadata thread can consumer them. | |
1082 | * | |
1083 | * Metadata stream lock MUST be acquired. | |
1084 | * | |
1085 | * Return 0 if new metadatda is available, EAGAIN if the metadata stream | |
1086 | * is empty or a negative value on error. | |
1087 | */ | |
1088 | int lttng_kconsumer_sync_metadata(struct lttng_consumer_stream *metadata) | |
1089 | { | |
1090 | int ret; | |
1091 | ||
1092 | assert(metadata); | |
1093 | ||
1094 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1095 | if (ret < 0) { | |
1096 | ERR("Failed to flush kernel stream"); | |
1097 | goto end; | |
1098 | } | |
1099 | ||
1100 | ret = kernctl_snapshot(metadata->wait_fd); | |
1101 | if (ret < 0) { | |
32af2c95 | 1102 | if (ret != -EAGAIN) { |
94d49140 JD |
1103 | ERR("Sync metadata, taking kernel snapshot failed."); |
1104 | goto end; | |
1105 | } | |
1106 | DBG("Sync metadata, no new kernel metadata"); | |
1107 | /* No new metadata, exit. */ | |
1108 | ret = ENODATA; | |
1109 | goto end; | |
1110 | } | |
1111 | ||
1112 | end: | |
1113 | return ret; | |
1114 | } | |
309167d2 | 1115 | |
fb83fe64 | 1116 | static |
29d1a7ae JG |
1117 | int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1118 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1119 | { |
1120 | int ret; | |
fb83fe64 | 1121 | |
29d1a7ae JG |
1122 | ret = kernctl_get_subbuf_size( |
1123 | stream->wait_fd, &subbuf->info.data.subbuf_size); | |
1124 | if (ret) { | |
fb83fe64 JD |
1125 | goto end; |
1126 | } | |
fb83fe64 | 1127 | |
29d1a7ae JG |
1128 | ret = kernctl_get_padded_subbuf_size( |
1129 | stream->wait_fd, &subbuf->info.data.padded_subbuf_size); | |
1130 | if (ret) { | |
fb83fe64 JD |
1131 | goto end; |
1132 | } | |
fb83fe64 JD |
1133 | |
1134 | end: | |
1135 | return ret; | |
1136 | } | |
1137 | ||
93ec662e | 1138 | static |
29d1a7ae JG |
1139 | int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1140 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1141 | { |
1142 | int ret; | |
93ec662e | 1143 | |
29d1a7ae JG |
1144 | ret = extract_common_subbuffer_info(stream, subbuf); |
1145 | if (ret) { | |
93ec662e JD |
1146 | goto end; |
1147 | } | |
1148 | ||
29d1a7ae JG |
1149 | ret = kernctl_get_metadata_version( |
1150 | stream->wait_fd, &subbuf->info.metadata.version); | |
1151 | if (ret) { | |
93ec662e JD |
1152 | goto end; |
1153 | } | |
1154 | ||
93ec662e JD |
1155 | end: |
1156 | return ret; | |
1157 | } | |
1158 | ||
29d1a7ae JG |
1159 | static |
1160 | int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, | |
1161 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1162 | { |
29d1a7ae | 1163 | int ret; |
d41f73b7 | 1164 | |
29d1a7ae JG |
1165 | ret = extract_common_subbuffer_info(stream, subbuf); |
1166 | if (ret) { | |
1167 | goto end; | |
1168 | } | |
309167d2 | 1169 | |
29d1a7ae JG |
1170 | ret = kernctl_get_packet_size( |
1171 | stream->wait_fd, &subbuf->info.data.packet_size); | |
1172 | if (ret < 0) { | |
1173 | PERROR("Failed to get sub-buffer packet size"); | |
d41f73b7 MD |
1174 | goto end; |
1175 | } | |
1176 | ||
29d1a7ae JG |
1177 | ret = kernctl_get_content_size( |
1178 | stream->wait_fd, &subbuf->info.data.content_size); | |
1179 | if (ret < 0) { | |
1180 | PERROR("Failed to get sub-buffer content size"); | |
1d4dfdef DG |
1181 | goto end; |
1182 | } | |
1183 | ||
29d1a7ae JG |
1184 | ret = kernctl_get_timestamp_begin( |
1185 | stream->wait_fd, &subbuf->info.data.timestamp_begin); | |
1186 | if (ret < 0) { | |
1187 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1188 | goto end; | |
1189 | } | |
1190 | ||
1191 | ret = kernctl_get_timestamp_end( | |
1192 | stream->wait_fd, &subbuf->info.data.timestamp_end); | |
1193 | if (ret < 0) { | |
1194 | PERROR("Failed to get sub-buffer end timestamp"); | |
1195 | goto end; | |
1196 | } | |
1197 | ||
1198 | ret = kernctl_get_events_discarded( | |
1199 | stream->wait_fd, &subbuf->info.data.events_discarded); | |
1200 | if (ret) { | |
1201 | PERROR("Failed to get sub-buffer events discarded count"); | |
1202 | goto end; | |
1203 | } | |
1204 | ||
1205 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
1206 | &subbuf->info.data.sequence_number.value); | |
1207 | if (ret) { | |
1208 | /* May not be supported by older LTTng-modules. */ | |
1209 | if (ret != -ENOTTY) { | |
1210 | PERROR("Failed to get sub-buffer sequence number"); | |
fb83fe64 JD |
1211 | goto end; |
1212 | } | |
1c20f0e2 | 1213 | } else { |
29d1a7ae | 1214 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1215 | } |
1216 | ||
29d1a7ae JG |
1217 | ret = kernctl_get_stream_id( |
1218 | stream->wait_fd, &subbuf->info.data.stream_id); | |
1219 | if (ret < 0) { | |
1220 | PERROR("Failed to get stream id"); | |
1221 | goto end; | |
1222 | } | |
1d4dfdef | 1223 | |
29d1a7ae JG |
1224 | ret = kernctl_get_instance_id(stream->wait_fd, |
1225 | &subbuf->info.data.stream_instance_id.value); | |
1226 | if (ret) { | |
1227 | /* May not be supported by older LTTng-modules. */ | |
1228 | if (ret != -ENOTTY) { | |
1229 | PERROR("Failed to get stream instance id"); | |
1d4dfdef DG |
1230 | goto end; |
1231 | } | |
29d1a7ae JG |
1232 | } else { |
1233 | subbuf->info.data.stream_instance_id.is_set = true; | |
1234 | } | |
1235 | end: | |
1236 | return ret; | |
1237 | } | |
47e81c02 | 1238 | |
29d1a7ae JG |
1239 | static |
1240 | int get_subbuffer_common(struct lttng_consumer_stream *stream, | |
1241 | struct stream_subbuffer *subbuffer) | |
1242 | { | |
1243 | int ret; | |
1fdb9a78 | 1244 | |
29d1a7ae JG |
1245 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1246 | if (ret) { | |
1247 | goto end; | |
1248 | } | |
1d4dfdef | 1249 | |
29d1a7ae JG |
1250 | ret = stream->read_subbuffer_ops.extract_subbuffer_info( |
1251 | stream, subbuffer); | |
1252 | end: | |
1253 | return ret; | |
1254 | } | |
1d4dfdef | 1255 | |
29d1a7ae JG |
1256 | static |
1257 | int get_next_subbuffer_splice(struct lttng_consumer_stream *stream, | |
1258 | struct stream_subbuffer *subbuffer) | |
1259 | { | |
1260 | int ret; | |
ace0e591 | 1261 | |
29d1a7ae JG |
1262 | ret = get_subbuffer_common(stream, subbuffer); |
1263 | if (ret) { | |
1264 | goto end; | |
d41f73b7 | 1265 | } |
29d1a7ae JG |
1266 | |
1267 | subbuffer->buffer.fd = stream->wait_fd; | |
1268 | end: | |
1269 | return ret; | |
1270 | } | |
1271 | ||
1272 | static | |
1273 | int get_next_subbuffer_mmap(struct lttng_consumer_stream *stream, | |
1274 | struct stream_subbuffer *subbuffer) | |
1275 | { | |
1276 | int ret; | |
1277 | const char *addr; | |
1278 | ||
1279 | ret = get_subbuffer_common(stream, subbuffer); | |
1280 | if (ret) { | |
d41f73b7 MD |
1281 | goto end; |
1282 | } | |
1283 | ||
29d1a7ae JG |
1284 | ret = get_current_subbuf_addr(stream, &addr); |
1285 | if (ret) { | |
1c20f0e2 JD |
1286 | goto end; |
1287 | } | |
1288 | ||
29d1a7ae JG |
1289 | subbuffer->buffer.buffer = lttng_buffer_view_init( |
1290 | addr, 0, subbuffer->info.data.padded_subbuf_size); | |
1291 | end: | |
1292 | return ret; | |
1293 | } | |
1294 | ||
1295 | static | |
1296 | int put_next_subbuffer(struct lttng_consumer_stream *stream, | |
1297 | struct stream_subbuffer *subbuffer) | |
1298 | { | |
1299 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1300 | ||
1301 | if (ret) { | |
1302 | if (ret == -EFAULT) { | |
1303 | PERROR("Error in unreserving sub buffer"); | |
1304 | } else if (ret == -EIO) { | |
1305 | /* Should never happen with newer LTTng versions */ | |
1306 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); | |
94d49140 JD |
1307 | } |
1308 | } | |
1309 | ||
29d1a7ae JG |
1310 | return ret; |
1311 | } | |
1312 | ||
1313 | static void lttng_kconsumer_set_stream_ops( | |
1314 | struct lttng_consumer_stream *stream) | |
1315 | { | |
1316 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
1317 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1318 | get_next_subbuffer_mmap; | |
1319 | } else { | |
1320 | stream->read_subbuffer_ops.get_next_subbuffer = | |
1321 | get_next_subbuffer_splice; | |
309167d2 JD |
1322 | } |
1323 | ||
29d1a7ae JG |
1324 | if (stream->metadata_flag) { |
1325 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1326 | extract_metadata_subbuffer_info; | |
1327 | } else { | |
1328 | stream->read_subbuffer_ops.extract_subbuffer_info = | |
1329 | extract_data_subbuffer_info; | |
1330 | if (stream->chan->is_live) { | |
1331 | stream->read_subbuffer_ops.send_live_beacon = | |
1332 | consumer_flush_kernel_index; | |
1333 | } | |
1334 | } | |
1335 | ||
1336 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; | |
d41f73b7 MD |
1337 | } |
1338 | ||
1339 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1340 | { | |
1341 | int ret; | |
ffe60014 DG |
1342 | |
1343 | assert(stream); | |
1344 | ||
2bba9e53 DG |
1345 | /* |
1346 | * Don't create anything if this is set for streaming or should not be | |
1347 | * monitored. | |
1348 | */ | |
6d40f8fa | 1349 | if (stream->relayd_id == (uint64_t) -1ULL && stream->chan->monitor) { |
fe4477ee JD |
1350 | ret = utils_create_stream_file(stream->chan->pathname, stream->name, |
1351 | stream->chan->tracefile_size, stream->tracefile_count_current, | |
309167d2 | 1352 | stream->uid, stream->gid, NULL); |
fe4477ee JD |
1353 | if (ret < 0) { |
1354 | goto error; | |
1355 | } | |
1356 | stream->out_fd = ret; | |
1357 | stream->tracefile_size_current = 0; | |
309167d2 JD |
1358 | |
1359 | if (!stream->metadata_flag) { | |
e0547b83 MD |
1360 | struct lttng_index_file *index_file; |
1361 | ||
1362 | index_file = lttng_index_file_create(stream->chan->pathname, | |
309167d2 JD |
1363 | stream->name, stream->uid, stream->gid, |
1364 | stream->chan->tracefile_size, | |
e0547b83 MD |
1365 | stream->tracefile_count_current, |
1366 | CTF_INDEX_MAJOR, CTF_INDEX_MINOR); | |
1367 | if (!index_file) { | |
309167d2 JD |
1368 | goto error; |
1369 | } | |
e0547b83 | 1370 | stream->index_file = index_file; |
309167d2 | 1371 | } |
ffe60014 | 1372 | } |
d41f73b7 | 1373 | |
d41f73b7 MD |
1374 | if (stream->output == LTTNG_EVENT_MMAP) { |
1375 | /* get the len of the mmap region */ | |
1376 | unsigned long mmap_len; | |
1377 | ||
1378 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1379 | if (ret != 0) { | |
ffe60014 | 1380 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1381 | goto error_close_fd; |
1382 | } | |
1383 | stream->mmap_len = (size_t) mmap_len; | |
1384 | ||
ffe60014 DG |
1385 | stream->mmap_base = mmap(NULL, stream->mmap_len, PROT_READ, |
1386 | MAP_PRIVATE, stream->wait_fd, 0); | |
d41f73b7 | 1387 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1388 | PERROR("Error mmaping"); |
d41f73b7 MD |
1389 | ret = -1; |
1390 | goto error_close_fd; | |
1391 | } | |
1392 | } | |
1393 | ||
29d1a7ae JG |
1394 | lttng_kconsumer_set_stream_ops(stream); |
1395 | ||
d41f73b7 MD |
1396 | /* we return 0 to let the library handle the FD internally */ |
1397 | return 0; | |
1398 | ||
1399 | error_close_fd: | |
2f225ce2 | 1400 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1401 | int err; |
1402 | ||
1403 | err = close(stream->out_fd); | |
1404 | assert(!err); | |
2f225ce2 | 1405 | stream->out_fd = -1; |
d41f73b7 MD |
1406 | } |
1407 | error: | |
1408 | return ret; | |
1409 | } | |
1410 | ||
ca22feea DG |
1411 | /* |
1412 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1413 | * stream. Consumer data lock MUST be acquired before calling this function |
1414 | * and the stream lock. | |
ca22feea | 1415 | * |
6d805429 | 1416 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1417 | * data is available for trace viewer reading. |
1418 | */ | |
6d805429 | 1419 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1420 | { |
1421 | int ret; | |
1422 | ||
1423 | assert(stream); | |
1424 | ||
873b9e9a MD |
1425 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1426 | ret = 0; | |
1427 | goto end; | |
1428 | } | |
1429 | ||
ca22feea DG |
1430 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1431 | if (ret == 0) { | |
1432 | /* There is still data so let's put back this subbuffer. */ | |
1433 | ret = kernctl_put_subbuf(stream->wait_fd); | |
1434 | assert(ret == 0); | |
6d805429 | 1435 | ret = 1; /* Data is pending */ |
4e9a4686 | 1436 | goto end; |
ca22feea DG |
1437 | } |
1438 | ||
6d805429 DG |
1439 | /* Data is NOT pending and ready to be read. */ |
1440 | ret = 0; | |
ca22feea | 1441 | |
6efae65e DG |
1442 | end: |
1443 | return ret; | |
ca22feea | 1444 | } |