Commit | Line | Data |
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3bd1e081 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * Copyright (C) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
3bd1e081 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
3bd1e081 | 7 | * |
3bd1e081 MD |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
28ab034a | 11 | #include "kernel-consumer.hpp" |
3bd1e081 | 12 | |
28ab034a | 13 | #include <common/buffer-view.hpp> |
c9e313bc | 14 | #include <common/common.hpp> |
c9e313bc | 15 | #include <common/compat/endian.hpp> |
c9e313bc | 16 | #include <common/consumer/consumer-stream.hpp> |
c9e313bc | 17 | #include <common/consumer/consumer-timer.hpp> |
c9e313bc SM |
18 | #include <common/consumer/consumer.hpp> |
19 | #include <common/consumer/metadata-bucket.hpp> | |
28ab034a JG |
20 | #include <common/index/index.hpp> |
21 | #include <common/kernel-ctl/kernel-ctl.hpp> | |
22 | #include <common/optional.hpp> | |
23 | #include <common/pipe.hpp> | |
1e407985 | 24 | #include <common/pthread-lock.hpp> |
28ab034a | 25 | #include <common/relayd/relayd.hpp> |
1e407985 | 26 | #include <common/scope-exit.hpp> |
28ab034a JG |
27 | #include <common/sessiond-comm/relayd.hpp> |
28 | #include <common/sessiond-comm/sessiond-comm.hpp> | |
56047f5a | 29 | #include <common/urcu.hpp> |
28ab034a | 30 | #include <common/utils.hpp> |
0857097f | 31 | |
28ab034a | 32 | #include <bin/lttng-consumerd/health-consumerd.hpp> |
671e39d7 | 33 | #include <fcntl.h> |
28ab034a JG |
34 | #include <inttypes.h> |
35 | #include <poll.h> | |
36 | #include <pthread.h> | |
37 | #include <stdint.h> | |
38 | #include <stdlib.h> | |
39 | #include <string.h> | |
40 | #include <sys/mman.h> | |
41 | #include <sys/socket.h> | |
42 | #include <sys/stat.h> | |
43 | #include <sys/types.h> | |
44 | #include <unistd.h> | |
3bd1e081 | 45 | |
fa29bfbf | 46 | extern struct lttng_consumer_global_data the_consumer_data; |
3bd1e081 | 47 | extern int consumer_poll_timeout; |
3bd1e081 | 48 | |
3bd1e081 MD |
49 | /* |
50 | * Take a snapshot for a specific fd | |
51 | * | |
52 | * Returns 0 on success, < 0 on error | |
53 | */ | |
ffe60014 | 54 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_stream *stream) |
3bd1e081 MD |
55 | { |
56 | int ret = 0; | |
07c4863f | 57 | const int infd = stream->wait_fd; |
3bd1e081 MD |
58 | |
59 | ret = kernctl_snapshot(infd); | |
d2d2f190 JD |
60 | /* |
61 | * -EAGAIN is not an error, it just means that there is no data to | |
62 | * be read. | |
63 | */ | |
64 | if (ret != 0 && ret != -EAGAIN) { | |
5a510c9f | 65 | PERROR("Getting sub-buffer snapshot."); |
3bd1e081 MD |
66 | } |
67 | ||
68 | return ret; | |
69 | } | |
70 | ||
e9404c27 JG |
71 | /* |
72 | * Sample consumed and produced positions for a specific fd. | |
73 | * | |
74 | * Returns 0 on success, < 0 on error. | |
75 | */ | |
28ab034a | 76 | int lttng_kconsumer_sample_snapshot_positions(struct lttng_consumer_stream *stream) |
e9404c27 | 77 | { |
a0377dfe | 78 | LTTNG_ASSERT(stream); |
e9404c27 JG |
79 | |
80 | return kernctl_snapshot_sample_positions(stream->wait_fd); | |
81 | } | |
82 | ||
3bd1e081 MD |
83 | /* |
84 | * Get the produced position | |
85 | * | |
86 | * Returns 0 on success, < 0 on error | |
87 | */ | |
28ab034a | 88 | int lttng_kconsumer_get_produced_snapshot(struct lttng_consumer_stream *stream, unsigned long *pos) |
3bd1e081 MD |
89 | { |
90 | int ret; | |
07c4863f | 91 | const int infd = stream->wait_fd; |
3bd1e081 MD |
92 | |
93 | ret = kernctl_snapshot_get_produced(infd, pos); | |
94 | if (ret != 0) { | |
5a510c9f | 95 | PERROR("kernctl_snapshot_get_produced"); |
3bd1e081 MD |
96 | } |
97 | ||
98 | return ret; | |
99 | } | |
100 | ||
07b86b52 JD |
101 | /* |
102 | * Get the consumerd position | |
103 | * | |
104 | * Returns 0 on success, < 0 on error | |
105 | */ | |
28ab034a | 106 | int lttng_kconsumer_get_consumed_snapshot(struct lttng_consumer_stream *stream, unsigned long *pos) |
07b86b52 JD |
107 | { |
108 | int ret; | |
07c4863f | 109 | const int infd = stream->wait_fd; |
07b86b52 JD |
110 | |
111 | ret = kernctl_snapshot_get_consumed(infd, pos); | |
112 | if (ret != 0) { | |
5a510c9f | 113 | PERROR("kernctl_snapshot_get_consumed"); |
07b86b52 JD |
114 | } |
115 | ||
116 | return ret; | |
117 | } | |
118 | ||
28ab034a | 119 | static int get_current_subbuf_addr(struct lttng_consumer_stream *stream, const char **addr) |
128708c3 JG |
120 | { |
121 | int ret; | |
122 | unsigned long mmap_offset; | |
97535efa | 123 | const char *mmap_base = (const char *) stream->mmap_base; |
128708c3 JG |
124 | |
125 | ret = kernctl_get_mmap_read_offset(stream->wait_fd, &mmap_offset); | |
126 | if (ret < 0) { | |
127 | PERROR("Failed to get mmap read offset"); | |
128 | goto error; | |
129 | } | |
130 | ||
131 | *addr = mmap_base + mmap_offset; | |
132 | error: | |
133 | return ret; | |
134 | } | |
135 | ||
07b86b52 JD |
136 | /* |
137 | * Take a snapshot of all the stream of a channel | |
3eb928aa | 138 | * RCU read-side lock must be held across this function to ensure existence of |
947bd097 | 139 | * channel. |
07b86b52 JD |
140 | * |
141 | * Returns 0 on success, < 0 on error | |
142 | */ | |
28ab034a JG |
143 | static int lttng_kconsumer_snapshot_channel(struct lttng_consumer_channel *channel, |
144 | uint64_t key, | |
145 | char *path, | |
146 | uint64_t relayd_id, | |
147 | uint64_t nb_packets_per_stream) | |
07b86b52 JD |
148 | { |
149 | int ret; | |
07b86b52 | 150 | |
6a00837f | 151 | DBG("Kernel consumer snapshot channel %" PRIu64, key); |
07b86b52 | 152 | |
947bd097 | 153 | /* Prevent channel modifications while we perform the snapshot.*/ |
1e407985 | 154 | const lttng::pthread::lock_guard channe_lock(channel->lock); |
947bd097 | 155 | |
07c4863f | 156 | const lttng::urcu::read_lock_guard read_lock; |
07b86b52 | 157 | |
07b86b52 JD |
158 | /* Splice is not supported yet for channel snapshot. */ |
159 | if (channel->output != CONSUMER_CHANNEL_MMAP) { | |
9381314c | 160 | ERR("Unsupported output type for channel \"%s\": mmap output is required to record a snapshot", |
28ab034a | 161 | channel->name); |
07b86b52 JD |
162 | ret = -1; |
163 | goto end; | |
164 | } | |
165 | ||
1e407985 JG |
166 | for (auto stream : lttng::urcu::list_iteration_adapter<lttng_consumer_stream, |
167 | <tng_consumer_stream::send_node>( | |
168 | channel->streams.head)) { | |
923333cd | 169 | unsigned long consumed_pos, produced_pos; |
9ce5646a MD |
170 | |
171 | health_code_update(); | |
172 | ||
07b86b52 JD |
173 | /* |
174 | * Lock stream because we are about to change its state. | |
175 | */ | |
1e407985 | 176 | const lttng::pthread::lock_guard stream_lock(stream->lock); |
07b86b52 | 177 | |
a0377dfe | 178 | LTTNG_ASSERT(channel->trace_chunk); |
d2956687 JG |
179 | if (!lttng_trace_chunk_get(channel->trace_chunk)) { |
180 | /* | |
181 | * Can't happen barring an internal error as the channel | |
182 | * holds a reference to the trace chunk. | |
183 | */ | |
184 | ERR("Failed to acquire reference to channel's trace chunk"); | |
185 | ret = -1; | |
1e407985 | 186 | goto end; |
d2956687 | 187 | } |
a0377dfe | 188 | LTTNG_ASSERT(!stream->trace_chunk); |
d2956687 JG |
189 | stream->trace_chunk = channel->trace_chunk; |
190 | ||
29decac3 DG |
191 | /* |
192 | * Assign the received relayd ID so we can use it for streaming. The streams | |
193 | * are not visible to anyone so this is OK to change it. | |
194 | */ | |
07b86b52 JD |
195 | stream->net_seq_idx = relayd_id; |
196 | channel->relayd_id = relayd_id; | |
1e407985 JG |
197 | |
198 | /* Close stream output when were are done. */ | |
199 | const auto close_stream_output = lttng::make_scope_exit( | |
200 | [stream]() noexcept { consumer_stream_close_output(stream); }); | |
201 | ||
07b86b52 | 202 | if (relayd_id != (uint64_t) -1ULL) { |
10a50311 | 203 | ret = consumer_send_relayd_stream(stream, path); |
07b86b52 JD |
204 | if (ret < 0) { |
205 | ERR("sending stream to relayd"); | |
1e407985 | 206 | goto end; |
07b86b52 | 207 | } |
07b86b52 | 208 | } else { |
28ab034a | 209 | ret = consumer_stream_create_output_files(stream, false); |
07b86b52 | 210 | if (ret < 0) { |
1e407985 | 211 | goto end; |
07b86b52 | 212 | } |
28ab034a | 213 | DBG("Kernel consumer snapshot stream (%" PRIu64 ")", stream->key); |
07b86b52 JD |
214 | } |
215 | ||
f22dd891 | 216 | ret = kernctl_buffer_flush_empty(stream->wait_fd); |
07b86b52 | 217 | if (ret < 0) { |
f22dd891 MD |
218 | /* |
219 | * Doing a buffer flush which does not take into | |
220 | * account empty packets. This is not perfect | |
221 | * for stream intersection, but required as a | |
222 | * fall-back when "flush_empty" is not | |
223 | * implemented by lttng-modules. | |
224 | */ | |
225 | ret = kernctl_buffer_flush(stream->wait_fd); | |
226 | if (ret < 0) { | |
227 | ERR("Failed to flush kernel stream"); | |
1e407985 | 228 | goto end; |
f22dd891 | 229 | } |
1e407985 | 230 | goto end; |
07b86b52 JD |
231 | } |
232 | ||
233 | ret = lttng_kconsumer_take_snapshot(stream); | |
234 | if (ret < 0) { | |
235 | ERR("Taking kernel snapshot"); | |
1e407985 | 236 | goto end; |
07b86b52 JD |
237 | } |
238 | ||
239 | ret = lttng_kconsumer_get_produced_snapshot(stream, &produced_pos); | |
240 | if (ret < 0) { | |
241 | ERR("Produced kernel snapshot position"); | |
1e407985 | 242 | goto end; |
07b86b52 JD |
243 | } |
244 | ||
245 | ret = lttng_kconsumer_get_consumed_snapshot(stream, &consumed_pos); | |
246 | if (ret < 0) { | |
247 | ERR("Consumerd kernel snapshot position"); | |
1e407985 | 248 | goto end; |
07b86b52 JD |
249 | } |
250 | ||
28ab034a JG |
251 | consumed_pos = consumer_get_consume_start_pos( |
252 | consumed_pos, produced_pos, nb_packets_per_stream, stream->max_sb_size); | |
5c786ded | 253 | |
9377d830 | 254 | while ((long) (consumed_pos - produced_pos) < 0) { |
07b86b52 JD |
255 | ssize_t read_len; |
256 | unsigned long len, padded_len; | |
128708c3 | 257 | const char *subbuf_addr; |
fd424d99 | 258 | struct lttng_buffer_view subbuf_view; |
07b86b52 | 259 | |
9ce5646a | 260 | health_code_update(); |
07b86b52 JD |
261 | DBG("Kernel consumer taking snapshot at pos %lu", consumed_pos); |
262 | ||
263 | ret = kernctl_get_subbuf(stream->wait_fd, &consumed_pos); | |
264 | if (ret < 0) { | |
32af2c95 | 265 | if (ret != -EAGAIN) { |
07b86b52 | 266 | PERROR("kernctl_get_subbuf snapshot"); |
1e407985 | 267 | goto end; |
07b86b52 JD |
268 | } |
269 | DBG("Kernel consumer get subbuf failed. Skipping it."); | |
270 | consumed_pos += stream->max_sb_size; | |
ddc93ee4 | 271 | stream->chan->lost_packets++; |
07b86b52 JD |
272 | continue; |
273 | } | |
274 | ||
1e407985 JG |
275 | /* Put the subbuffer once we are done. */ |
276 | const auto put_subbuf = lttng::make_scope_exit([stream]() noexcept { | |
277 | const auto put_ret = kernctl_put_subbuf(stream->wait_fd); | |
278 | if (put_ret < 0) { | |
279 | ERR("Snapshot kernctl_put_subbuf"); | |
280 | } | |
281 | }); | |
282 | ||
07b86b52 JD |
283 | ret = kernctl_get_subbuf_size(stream->wait_fd, &len); |
284 | if (ret < 0) { | |
285 | ERR("Snapshot kernctl_get_subbuf_size"); | |
1e407985 | 286 | goto end; |
07b86b52 JD |
287 | } |
288 | ||
289 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, &padded_len); | |
290 | if (ret < 0) { | |
291 | ERR("Snapshot kernctl_get_padded_subbuf_size"); | |
1e407985 | 292 | goto end; |
07b86b52 JD |
293 | } |
294 | ||
128708c3 JG |
295 | ret = get_current_subbuf_addr(stream, &subbuf_addr); |
296 | if (ret) { | |
1e407985 | 297 | goto end; |
128708c3 JG |
298 | } |
299 | ||
28ab034a | 300 | subbuf_view = lttng_buffer_view_init(subbuf_addr, 0, padded_len); |
f5ba75b4 | 301 | read_len = lttng_consumer_on_read_subbuffer_mmap( |
28ab034a | 302 | stream, &subbuf_view, padded_len - len); |
07b86b52 | 303 | /* |
29decac3 DG |
304 | * We write the padded len in local tracefiles but the data len |
305 | * when using a relay. Display the error but continue processing | |
306 | * to try to release the subbuffer. | |
07b86b52 JD |
307 | */ |
308 | if (relayd_id != (uint64_t) -1ULL) { | |
309 | if (read_len != len) { | |
310 | ERR("Error sending to the relay (ret: %zd != len: %lu)", | |
28ab034a JG |
311 | read_len, |
312 | len); | |
07b86b52 JD |
313 | } |
314 | } else { | |
315 | if (read_len != padded_len) { | |
316 | ERR("Error writing to tracefile (ret: %zd != len: %lu)", | |
28ab034a JG |
317 | read_len, |
318 | padded_len); | |
07b86b52 JD |
319 | } |
320 | } | |
321 | ||
07b86b52 JD |
322 | consumed_pos += stream->max_sb_size; |
323 | } | |
07b86b52 JD |
324 | } |
325 | ||
326 | /* All good! */ | |
327 | ret = 0; | |
328 | goto end; | |
329 | ||
07b86b52 | 330 | end: |
07b86b52 JD |
331 | return ret; |
332 | } | |
333 | ||
334 | /* | |
335 | * Read the whole metadata available for a snapshot. | |
3eb928aa | 336 | * RCU read-side lock must be held across this function to ensure existence of |
947bd097 | 337 | * metadata_channel. |
07b86b52 JD |
338 | * |
339 | * Returns 0 on success, < 0 on error | |
340 | */ | |
28ab034a JG |
341 | static int lttng_kconsumer_snapshot_metadata(struct lttng_consumer_channel *metadata_channel, |
342 | uint64_t key, | |
343 | char *path, | |
344 | uint64_t relayd_id, | |
345 | struct lttng_consumer_local_data *ctx) | |
07b86b52 | 346 | { |
d771f832 DG |
347 | int ret, use_relayd = 0; |
348 | ssize_t ret_read; | |
07b86b52 | 349 | struct lttng_consumer_stream *metadata_stream; |
d771f832 | 350 | |
a0377dfe | 351 | LTTNG_ASSERT(ctx); |
07b86b52 | 352 | |
28ab034a | 353 | DBG("Kernel consumer snapshot metadata with key %" PRIu64 " at path %s", key, path); |
07b86b52 | 354 | |
07c4863f | 355 | const lttng::urcu::read_lock_guard read_lock; |
07b86b52 | 356 | |
07b86b52 | 357 | metadata_stream = metadata_channel->metadata_stream; |
a0377dfe | 358 | LTTNG_ASSERT(metadata_stream); |
d2956687 | 359 | |
947bd097 | 360 | metadata_stream->read_subbuffer_ops.lock(metadata_stream); |
a0377dfe FD |
361 | LTTNG_ASSERT(metadata_channel->trace_chunk); |
362 | LTTNG_ASSERT(metadata_stream->trace_chunk); | |
07b86b52 | 363 | |
d771f832 | 364 | /* Flag once that we have a valid relayd for the stream. */ |
e2039c7a | 365 | if (relayd_id != (uint64_t) -1ULL) { |
d771f832 DG |
366 | use_relayd = 1; |
367 | } | |
368 | ||
369 | if (use_relayd) { | |
10a50311 | 370 | ret = consumer_send_relayd_stream(metadata_stream, path); |
e2039c7a | 371 | if (ret < 0) { |
fa27abe8 | 372 | goto error_snapshot; |
e2039c7a | 373 | } |
e2039c7a | 374 | } else { |
28ab034a | 375 | ret = consumer_stream_create_output_files(metadata_stream, false); |
e2039c7a | 376 | if (ret < 0) { |
fa27abe8 | 377 | goto error_snapshot; |
e2039c7a | 378 | } |
07b86b52 | 379 | } |
07b86b52 | 380 | |
d771f832 | 381 | do { |
9ce5646a MD |
382 | health_code_update(); |
383 | ||
6f9449c2 | 384 | ret_read = lttng_consumer_read_subbuffer(metadata_stream, ctx, true); |
d771f832 | 385 | if (ret_read < 0) { |
28ab034a | 386 | ERR("Kernel snapshot reading metadata subbuffer (ret: %zd)", ret_read); |
6e5e3c51 MD |
387 | ret = ret_read; |
388 | goto error_snapshot; | |
07b86b52 | 389 | } |
6e5e3c51 | 390 | } while (ret_read > 0); |
07b86b52 | 391 | |
d771f832 DG |
392 | if (use_relayd) { |
393 | close_relayd_stream(metadata_stream); | |
394 | metadata_stream->net_seq_idx = (uint64_t) -1ULL; | |
395 | } else { | |
fdf9986c MD |
396 | if (metadata_stream->out_fd >= 0) { |
397 | ret = close(metadata_stream->out_fd); | |
398 | if (ret < 0) { | |
399 | PERROR("Kernel consumer snapshot metadata close out_fd"); | |
400 | /* | |
401 | * Don't go on error here since the snapshot was successful at this | |
402 | * point but somehow the close failed. | |
403 | */ | |
404 | } | |
405 | metadata_stream->out_fd = -1; | |
d2956687 | 406 | lttng_trace_chunk_put(metadata_stream->trace_chunk); |
cd9adb8b | 407 | metadata_stream->trace_chunk = nullptr; |
e2039c7a | 408 | } |
e2039c7a JD |
409 | } |
410 | ||
07b86b52 | 411 | ret = 0; |
fa27abe8 | 412 | error_snapshot: |
947bd097 | 413 | metadata_stream->read_subbuffer_ops.unlock(metadata_stream); |
cd9adb8b JG |
414 | consumer_stream_destroy(metadata_stream, nullptr); |
415 | metadata_channel->metadata_stream = nullptr; | |
07b86b52 JD |
416 | return ret; |
417 | } | |
418 | ||
1803a064 MD |
419 | /* |
420 | * Receive command from session daemon and process it. | |
421 | * | |
422 | * Return 1 on success else a negative value or 0. | |
423 | */ | |
3bd1e081 | 424 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, |
28ab034a JG |
425 | int sock, |
426 | struct pollfd *consumer_sockpoll) | |
3bd1e081 | 427 | { |
0c5b3718 | 428 | int ret_func; |
0c759fc9 | 429 | enum lttcomm_return_code ret_code = LTTCOMM_CONSUMERD_SUCCESS; |
3bd1e081 MD |
430 | struct lttcomm_consumer_msg msg; |
431 | ||
9ce5646a MD |
432 | health_code_update(); |
433 | ||
0c5b3718 SM |
434 | { |
435 | ssize_t ret_recv; | |
436 | ||
437 | ret_recv = lttcomm_recv_unix_sock(sock, &msg, sizeof(msg)); | |
438 | if (ret_recv != sizeof(msg)) { | |
439 | if (ret_recv > 0) { | |
28ab034a | 440 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_CMD); |
0c5b3718 SM |
441 | ret_recv = -1; |
442 | } | |
443 | return ret_recv; | |
1803a064 | 444 | } |
3bd1e081 | 445 | } |
9ce5646a MD |
446 | |
447 | health_code_update(); | |
448 | ||
84382d49 | 449 | /* Deprecated command */ |
a0377dfe | 450 | LTTNG_ASSERT(msg.cmd_type != LTTNG_CONSUMER_STOP); |
3bd1e081 | 451 | |
9ce5646a MD |
452 | health_code_update(); |
453 | ||
b0b335c8 | 454 | /* relayd needs RCU read-side protection */ |
07c4863f | 455 | const lttng::urcu::read_lock_guard read_lock; |
b0b335c8 | 456 | |
3bd1e081 | 457 | switch (msg.cmd_type) { |
00e2e675 DG |
458 | case LTTNG_CONSUMER_ADD_RELAYD_SOCKET: |
459 | { | |
07c4863f JG |
460 | const uint32_t major = msg.u.relayd_sock.major; |
461 | const uint32_t minor = msg.u.relayd_sock.minor; | |
462 | const lttcomm_sock_proto protocol = | |
28ab034a | 463 | (enum lttcomm_sock_proto) msg.u.relayd_sock.relayd_socket_protocol; |
4222116f | 464 | |
f50f23d9 | 465 | /* Session daemon status message are handled in the following call. */ |
2527bf85 | 466 | consumer_add_relayd_socket(msg.u.relayd_sock.net_index, |
28ab034a JG |
467 | msg.u.relayd_sock.type, |
468 | ctx, | |
469 | sock, | |
470 | consumer_sockpoll, | |
471 | msg.u.relayd_sock.session_id, | |
472 | msg.u.relayd_sock.relayd_session_id, | |
473 | major, | |
474 | minor, | |
475 | protocol); | |
00e2e675 DG |
476 | goto end_nosignal; |
477 | } | |
3bd1e081 MD |
478 | case LTTNG_CONSUMER_ADD_CHANNEL: |
479 | { | |
480 | struct lttng_consumer_channel *new_channel; | |
afbf29db | 481 | int ret_send_status, ret_add_channel = 0; |
d2956687 | 482 | const uint64_t chunk_id = msg.u.channel.chunk_id.value; |
3bd1e081 | 483 | |
9ce5646a MD |
484 | health_code_update(); |
485 | ||
f50f23d9 | 486 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
487 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
488 | if (ret_send_status < 0) { | |
f50f23d9 | 489 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 490 | goto error_fatal; |
f50f23d9 | 491 | } |
9ce5646a MD |
492 | |
493 | health_code_update(); | |
494 | ||
d88aee68 | 495 | DBG("consumer_add_channel %" PRIu64, msg.u.channel.channel_key); |
cd9adb8b JG |
496 | new_channel = consumer_allocate_channel(msg.u.channel.channel_key, |
497 | msg.u.channel.session_id, | |
498 | msg.u.channel.chunk_id.is_set ? &chunk_id : | |
499 | nullptr, | |
500 | msg.u.channel.pathname, | |
501 | msg.u.channel.name, | |
502 | msg.u.channel.relayd_id, | |
503 | msg.u.channel.output, | |
504 | msg.u.channel.tracefile_size, | |
505 | msg.u.channel.tracefile_count, | |
506 | 0, | |
507 | msg.u.channel.monitor, | |
508 | msg.u.channel.live_timer_interval, | |
509 | msg.u.channel.is_live, | |
510 | nullptr, | |
511 | nullptr); | |
512 | if (new_channel == nullptr) { | |
f73fabfd | 513 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); |
3bd1e081 MD |
514 | goto end_nosignal; |
515 | } | |
ffe60014 | 516 | new_channel->nb_init_stream_left = msg.u.channel.nb_init_streams; |
95a1109b JD |
517 | switch (msg.u.channel.output) { |
518 | case LTTNG_EVENT_SPLICE: | |
519 | new_channel->output = CONSUMER_CHANNEL_SPLICE; | |
520 | break; | |
521 | case LTTNG_EVENT_MMAP: | |
522 | new_channel->output = CONSUMER_CHANNEL_MMAP; | |
523 | break; | |
524 | default: | |
525 | ERR("Channel output unknown %d", msg.u.channel.output); | |
526 | goto end_nosignal; | |
527 | } | |
ffe60014 DG |
528 | |
529 | /* Translate and save channel type. */ | |
530 | switch (msg.u.channel.type) { | |
531 | case CONSUMER_CHANNEL_TYPE_DATA: | |
532 | case CONSUMER_CHANNEL_TYPE_METADATA: | |
97535efa | 533 | new_channel->type = (consumer_channel_type) msg.u.channel.type; |
ffe60014 DG |
534 | break; |
535 | default: | |
a0377dfe | 536 | abort(); |
ffe60014 DG |
537 | goto end_nosignal; |
538 | }; | |
539 | ||
9ce5646a MD |
540 | health_code_update(); |
541 | ||
cd9adb8b | 542 | if (ctx->on_recv_channel != nullptr) { |
07c4863f | 543 | const int ret_recv_channel = ctx->on_recv_channel(new_channel); |
0c5b3718 | 544 | if (ret_recv_channel == 0) { |
28ab034a | 545 | ret_add_channel = consumer_add_channel(new_channel, ctx); |
0c5b3718 | 546 | } else if (ret_recv_channel < 0) { |
3bd1e081 MD |
547 | goto end_nosignal; |
548 | } | |
549 | } else { | |
28ab034a | 550 | ret_add_channel = consumer_add_channel(new_channel, ctx); |
3bd1e081 | 551 | } |
28ab034a | 552 | if (msg.u.channel.type == CONSUMER_CHANNEL_TYPE_DATA && !ret_add_channel) { |
e9404c27 JG |
553 | int monitor_start_ret; |
554 | ||
555 | DBG("Consumer starting monitor timer"); | |
28ab034a | 556 | consumer_timer_live_start(new_channel, msg.u.channel.live_timer_interval); |
e9404c27 | 557 | monitor_start_ret = consumer_timer_monitor_start( |
28ab034a | 558 | new_channel, msg.u.channel.monitor_timer_interval); |
e9404c27 JG |
559 | if (monitor_start_ret < 0) { |
560 | ERR("Starting channel monitoring timer failed"); | |
561 | goto end_nosignal; | |
562 | } | |
94d49140 | 563 | } |
e43c41c5 | 564 | |
9ce5646a MD |
565 | health_code_update(); |
566 | ||
e43c41c5 | 567 | /* If we received an error in add_channel, we need to report it. */ |
0c5b3718 | 568 | if (ret_add_channel < 0) { |
28ab034a | 569 | ret_send_status = consumer_send_status_msg(sock, ret_add_channel); |
0c5b3718 | 570 | if (ret_send_status < 0) { |
1803a064 MD |
571 | goto error_fatal; |
572 | } | |
e43c41c5 JD |
573 | goto end_nosignal; |
574 | } | |
575 | ||
3bd1e081 MD |
576 | goto end_nosignal; |
577 | } | |
578 | case LTTNG_CONSUMER_ADD_STREAM: | |
579 | { | |
dae10966 DG |
580 | int fd; |
581 | struct lttng_pipe *stream_pipe; | |
00e2e675 | 582 | struct lttng_consumer_stream *new_stream; |
ffe60014 | 583 | struct lttng_consumer_channel *channel; |
c80048c6 | 584 | int alloc_ret = 0; |
0c5b3718 SM |
585 | int ret_send_status, ret_poll, ret_get_max_subbuf_size; |
586 | ssize_t ret_pipe_write, ret_recv; | |
3bd1e081 | 587 | |
ffe60014 DG |
588 | /* |
589 | * Get stream's channel reference. Needed when adding the stream to the | |
590 | * global hash table. | |
591 | */ | |
592 | channel = consumer_find_channel(msg.u.stream.channel_key); | |
593 | if (!channel) { | |
594 | /* | |
595 | * We could not find the channel. Can happen if cpu hotplug | |
596 | * happens while tearing down. | |
597 | */ | |
d88aee68 | 598 | ERR("Unable to find channel key %" PRIu64, msg.u.stream.channel_key); |
e462382a | 599 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
ffe60014 DG |
600 | } |
601 | ||
9ce5646a MD |
602 | health_code_update(); |
603 | ||
f50f23d9 | 604 | /* First send a status message before receiving the fds. */ |
0c5b3718 SM |
605 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
606 | if (ret_send_status < 0) { | |
d771f832 | 607 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 608 | goto error_add_stream_fatal; |
1803a064 | 609 | } |
9ce5646a MD |
610 | |
611 | health_code_update(); | |
612 | ||
0c759fc9 | 613 | if (ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
d771f832 | 614 | /* Channel was not found. */ |
c5c7998f | 615 | goto error_add_stream_nosignal; |
f50f23d9 DG |
616 | } |
617 | ||
d771f832 | 618 | /* Blocking call */ |
9ce5646a | 619 | health_poll_entry(); |
0c5b3718 | 620 | ret_poll = lttng_consumer_poll_socket(consumer_sockpoll); |
9ce5646a | 621 | health_poll_exit(); |
0c5b3718 | 622 | if (ret_poll) { |
c5c7998f | 623 | goto error_add_stream_fatal; |
3bd1e081 | 624 | } |
00e2e675 | 625 | |
9ce5646a MD |
626 | health_code_update(); |
627 | ||
00e2e675 | 628 | /* Get stream file descriptor from socket */ |
0c5b3718 SM |
629 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &fd, 1); |
630 | if (ret_recv != sizeof(fd)) { | |
f73fabfd | 631 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_ERROR_RECV_FD); |
0c5b3718 | 632 | ret_func = ret_recv; |
c5c7998f | 633 | goto end; |
3bd1e081 | 634 | } |
3bd1e081 | 635 | |
9ce5646a MD |
636 | health_code_update(); |
637 | ||
f50f23d9 DG |
638 | /* |
639 | * Send status code to session daemon only if the recv works. If the | |
640 | * above recv() failed, the session daemon is notified through the | |
641 | * error socket and the teardown is eventually done. | |
642 | */ | |
0c5b3718 SM |
643 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
644 | if (ret_send_status < 0) { | |
f50f23d9 | 645 | /* Somehow, the session daemon is not responding anymore. */ |
c5c7998f | 646 | goto error_add_stream_nosignal; |
f50f23d9 DG |
647 | } |
648 | ||
9ce5646a MD |
649 | health_code_update(); |
650 | ||
d2956687 | 651 | pthread_mutex_lock(&channel->lock); |
28ab034a JG |
652 | new_stream = consumer_stream_create(channel, |
653 | channel->key, | |
654 | fd, | |
655 | channel->name, | |
656 | channel->relayd_id, | |
657 | channel->session_id, | |
658 | channel->trace_chunk, | |
659 | msg.u.stream.cpu, | |
660 | &alloc_ret, | |
661 | channel->type, | |
662 | channel->monitor); | |
cd9adb8b | 663 | if (new_stream == nullptr) { |
c80048c6 MD |
664 | switch (alloc_ret) { |
665 | case -ENOMEM: | |
666 | case -EINVAL: | |
667 | default: | |
668 | lttng_consumer_send_error(ctx, LTTCOMM_CONSUMERD_OUTFD_ERROR); | |
669 | break; | |
c80048c6 | 670 | } |
d2956687 | 671 | pthread_mutex_unlock(&channel->lock); |
c5c7998f | 672 | goto error_add_stream_nosignal; |
3bd1e081 | 673 | } |
d771f832 | 674 | |
ffe60014 | 675 | new_stream->wait_fd = fd; |
28ab034a JG |
676 | ret_get_max_subbuf_size = |
677 | kernctl_get_max_subbuf_size(new_stream->wait_fd, &new_stream->max_sb_size); | |
0c5b3718 | 678 | if (ret_get_max_subbuf_size < 0) { |
d05185fa JG |
679 | pthread_mutex_unlock(&channel->lock); |
680 | ERR("Failed to get kernel maximal subbuffer size"); | |
c5c7998f | 681 | goto error_add_stream_nosignal; |
d05185fa JG |
682 | } |
683 | ||
28ab034a | 684 | consumer_stream_update_channel_attributes(new_stream, channel); |
00e2e675 | 685 | |
a0c83db9 DG |
686 | /* |
687 | * We've just assigned the channel to the stream so increment the | |
07b86b52 JD |
688 | * refcount right now. We don't need to increment the refcount for |
689 | * streams in no monitor because we handle manually the cleanup of | |
690 | * those. It is very important to make sure there is NO prior | |
691 | * consumer_del_stream() calls or else the refcount will be unbalanced. | |
a0c83db9 | 692 | */ |
07b86b52 JD |
693 | if (channel->monitor) { |
694 | uatomic_inc(&new_stream->chan->refcount); | |
695 | } | |
9d9353f9 | 696 | |
fb3a43a9 DG |
697 | /* |
698 | * The buffer flush is done on the session daemon side for the kernel | |
699 | * so no need for the stream "hangup_flush_done" variable to be | |
700 | * tracked. This is important for a kernel stream since we don't rely | |
701 | * on the flush state of the stream to read data. It's not the case for | |
702 | * user space tracing. | |
703 | */ | |
704 | new_stream->hangup_flush_done = 0; | |
705 | ||
9ce5646a MD |
706 | health_code_update(); |
707 | ||
d2956687 | 708 | pthread_mutex_lock(&new_stream->lock); |
633d0084 | 709 | if (ctx->on_recv_stream) { |
07c4863f | 710 | const int ret_recv_stream = ctx->on_recv_stream(new_stream); |
0c5b3718 | 711 | if (ret_recv_stream < 0) { |
d2956687 JG |
712 | pthread_mutex_unlock(&new_stream->lock); |
713 | pthread_mutex_unlock(&channel->lock); | |
d771f832 | 714 | consumer_stream_free(new_stream); |
c5c7998f | 715 | goto error_add_stream_nosignal; |
fb3a43a9 | 716 | } |
633d0084 | 717 | } |
9ce5646a MD |
718 | health_code_update(); |
719 | ||
07b86b52 JD |
720 | if (new_stream->metadata_flag) { |
721 | channel->metadata_stream = new_stream; | |
722 | } | |
723 | ||
2bba9e53 DG |
724 | /* Do not monitor this stream. */ |
725 | if (!channel->monitor) { | |
5eecee74 | 726 | DBG("Kernel consumer add stream %s in no monitor mode with " |
28ab034a JG |
727 | "relayd id %" PRIu64, |
728 | new_stream->name, | |
729 | new_stream->net_seq_idx); | |
10a50311 | 730 | cds_list_add(&new_stream->send_node, &channel->streams.head); |
d2956687 JG |
731 | pthread_mutex_unlock(&new_stream->lock); |
732 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 733 | goto end_add_stream; |
6dc3064a DG |
734 | } |
735 | ||
e1b71bdc DG |
736 | /* Send stream to relayd if the stream has an ID. */ |
737 | if (new_stream->net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
738 | int ret_send_relayd_stream; |
739 | ||
28ab034a JG |
740 | ret_send_relayd_stream = |
741 | consumer_send_relayd_stream(new_stream, new_stream->chan->pathname); | |
0c5b3718 | 742 | if (ret_send_relayd_stream < 0) { |
d2956687 JG |
743 | pthread_mutex_unlock(&new_stream->lock); |
744 | pthread_mutex_unlock(&channel->lock); | |
e1b71bdc | 745 | consumer_stream_free(new_stream); |
c5c7998f | 746 | goto error_add_stream_nosignal; |
e1b71bdc | 747 | } |
001b7e62 MD |
748 | |
749 | /* | |
750 | * If adding an extra stream to an already | |
751 | * existing channel (e.g. cpu hotplug), we need | |
752 | * to send the "streams_sent" command to relayd. | |
753 | */ | |
754 | if (channel->streams_sent_to_relayd) { | |
0c5b3718 SM |
755 | int ret_send_relayd_streams_sent; |
756 | ||
757 | ret_send_relayd_streams_sent = | |
28ab034a | 758 | consumer_send_relayd_streams_sent(new_stream->net_seq_idx); |
0c5b3718 | 759 | if (ret_send_relayd_streams_sent < 0) { |
d2956687 JG |
760 | pthread_mutex_unlock(&new_stream->lock); |
761 | pthread_mutex_unlock(&channel->lock); | |
c5c7998f | 762 | goto error_add_stream_nosignal; |
001b7e62 MD |
763 | } |
764 | } | |
e2039c7a | 765 | } |
d2956687 JG |
766 | pthread_mutex_unlock(&new_stream->lock); |
767 | pthread_mutex_unlock(&channel->lock); | |
e2039c7a | 768 | |
50f8ae69 | 769 | /* Get the right pipe where the stream will be sent. */ |
633d0084 | 770 | if (new_stream->metadata_flag) { |
66d583dc | 771 | consumer_add_metadata_stream(new_stream); |
dae10966 | 772 | stream_pipe = ctx->consumer_metadata_pipe; |
3bd1e081 | 773 | } else { |
66d583dc | 774 | consumer_add_data_stream(new_stream); |
dae10966 | 775 | stream_pipe = ctx->consumer_data_pipe; |
50f8ae69 DG |
776 | } |
777 | ||
66d583dc | 778 | /* Visible to other threads */ |
5ab66908 MD |
779 | new_stream->globally_visible = 1; |
780 | ||
9ce5646a MD |
781 | health_code_update(); |
782 | ||
5c7248cd JG |
783 | ret_pipe_write = |
784 | lttng_pipe_write(stream_pipe, &new_stream, sizeof(new_stream)); /* NOLINT | |
785 | sizeof | |
786 | used on a | |
787 | pointer. | |
788 | */ | |
0c5b3718 | 789 | if (ret_pipe_write < 0) { |
dae10966 | 790 | ERR("Consumer write %s stream to pipe %d", |
28ab034a JG |
791 | new_stream->metadata_flag ? "metadata" : "data", |
792 | lttng_pipe_get_writefd(stream_pipe)); | |
5ab66908 MD |
793 | if (new_stream->metadata_flag) { |
794 | consumer_del_stream_for_metadata(new_stream); | |
795 | } else { | |
796 | consumer_del_stream_for_data(new_stream); | |
797 | } | |
c5c7998f | 798 | goto error_add_stream_nosignal; |
3bd1e081 | 799 | } |
00e2e675 | 800 | |
02d02e31 | 801 | DBG("Kernel consumer ADD_STREAM %s (fd: %d) %s with relayd id %" PRIu64, |
28ab034a JG |
802 | new_stream->name, |
803 | fd, | |
804 | new_stream->chan->pathname, | |
805 | new_stream->relayd_stream_id); | |
806 | end_add_stream: | |
3bd1e081 | 807 | break; |
28ab034a | 808 | error_add_stream_nosignal: |
c5c7998f | 809 | goto end_nosignal; |
28ab034a | 810 | error_add_stream_fatal: |
c5c7998f | 811 | goto error_fatal; |
3bd1e081 | 812 | } |
a4baae1b JD |
813 | case LTTNG_CONSUMER_STREAMS_SENT: |
814 | { | |
815 | struct lttng_consumer_channel *channel; | |
0c5b3718 | 816 | int ret_send_status; |
a4baae1b JD |
817 | |
818 | /* | |
819 | * Get stream's channel reference. Needed when adding the stream to the | |
820 | * global hash table. | |
821 | */ | |
822 | channel = consumer_find_channel(msg.u.sent_streams.channel_key); | |
823 | if (!channel) { | |
824 | /* | |
825 | * We could not find the channel. Can happen if cpu hotplug | |
826 | * happens while tearing down. | |
827 | */ | |
28ab034a | 828 | ERR("Unable to find channel key %" PRIu64, msg.u.sent_streams.channel_key); |
e462382a | 829 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
a4baae1b JD |
830 | } |
831 | ||
832 | health_code_update(); | |
833 | ||
834 | /* | |
835 | * Send status code to session daemon. | |
836 | */ | |
0c5b3718 | 837 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
28ab034a | 838 | if (ret_send_status < 0 || ret_code != LTTCOMM_CONSUMERD_SUCCESS) { |
a4baae1b | 839 | /* Somehow, the session daemon is not responding anymore. */ |
80d5a658 | 840 | goto error_streams_sent_nosignal; |
a4baae1b JD |
841 | } |
842 | ||
843 | health_code_update(); | |
844 | ||
845 | /* | |
846 | * We should not send this message if we don't monitor the | |
847 | * streams in this channel. | |
848 | */ | |
849 | if (!channel->monitor) { | |
80d5a658 | 850 | goto end_error_streams_sent; |
a4baae1b JD |
851 | } |
852 | ||
853 | health_code_update(); | |
854 | /* Send stream to relayd if the stream has an ID. */ | |
855 | if (msg.u.sent_streams.net_seq_idx != (uint64_t) -1ULL) { | |
0c5b3718 SM |
856 | int ret_send_relay_streams; |
857 | ||
28ab034a JG |
858 | ret_send_relay_streams = |
859 | consumer_send_relayd_streams_sent(msg.u.sent_streams.net_seq_idx); | |
0c5b3718 | 860 | if (ret_send_relay_streams < 0) { |
80d5a658 | 861 | goto error_streams_sent_nosignal; |
a4baae1b | 862 | } |
001b7e62 | 863 | channel->streams_sent_to_relayd = true; |
a4baae1b | 864 | } |
28ab034a | 865 | end_error_streams_sent: |
a4baae1b | 866 | break; |
28ab034a | 867 | error_streams_sent_nosignal: |
80d5a658 | 868 | goto end_nosignal; |
a4baae1b | 869 | } |
3bd1e081 MD |
870 | case LTTNG_CONSUMER_UPDATE_STREAM: |
871 | { | |
3f8e211f DG |
872 | return -ENOSYS; |
873 | } | |
874 | case LTTNG_CONSUMER_DESTROY_RELAYD: | |
875 | { | |
07c4863f | 876 | const uint64_t index = msg.u.destroy_relayd.net_seq_idx; |
3f8e211f | 877 | struct consumer_relayd_sock_pair *relayd; |
0c5b3718 | 878 | int ret_send_status; |
3f8e211f | 879 | |
a6ba4fe1 | 880 | DBG("Kernel consumer destroying relayd %" PRIu64, index); |
3f8e211f DG |
881 | |
882 | /* Get relayd reference if exists. */ | |
a6ba4fe1 | 883 | relayd = consumer_find_relayd(index); |
cd9adb8b | 884 | if (relayd == nullptr) { |
3448e266 | 885 | DBG("Unable to find relayd %" PRIu64, index); |
e462382a | 886 | ret_code = LTTCOMM_CONSUMERD_RELAYD_FAIL; |
3bd1e081 | 887 | } |
3f8e211f | 888 | |
a6ba4fe1 DG |
889 | /* |
890 | * Each relayd socket pair has a refcount of stream attached to it | |
891 | * which tells if the relayd is still active or not depending on the | |
892 | * refcount value. | |
893 | * | |
894 | * This will set the destroy flag of the relayd object and destroy it | |
895 | * if the refcount reaches zero when called. | |
896 | * | |
897 | * The destroy can happen either here or when a stream fd hangs up. | |
898 | */ | |
f50f23d9 DG |
899 | if (relayd) { |
900 | consumer_flag_relayd_for_destroy(relayd); | |
901 | } | |
902 | ||
9ce5646a MD |
903 | health_code_update(); |
904 | ||
0c5b3718 SM |
905 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
906 | if (ret_send_status < 0) { | |
f50f23d9 | 907 | /* Somehow, the session daemon is not responding anymore. */ |
1803a064 | 908 | goto error_fatal; |
f50f23d9 | 909 | } |
3f8e211f | 910 | |
3f8e211f | 911 | goto end_nosignal; |
3bd1e081 | 912 | } |
6d805429 | 913 | case LTTNG_CONSUMER_DATA_PENDING: |
53632229 | 914 | { |
0c5b3718 | 915 | int32_t ret_data_pending; |
07c4863f | 916 | const uint64_t id = msg.u.data_pending.session_id; |
0c5b3718 | 917 | ssize_t ret_send; |
c8f59ee5 | 918 | |
6d805429 | 919 | DBG("Kernel consumer data pending command for id %" PRIu64, id); |
c8f59ee5 | 920 | |
0c5b3718 | 921 | ret_data_pending = consumer_data_pending(id); |
c8f59ee5 | 922 | |
9ce5646a MD |
923 | health_code_update(); |
924 | ||
c8f59ee5 | 925 | /* Send back returned value to session daemon */ |
28ab034a JG |
926 | ret_send = |
927 | lttcomm_send_unix_sock(sock, &ret_data_pending, sizeof(ret_data_pending)); | |
0c5b3718 | 928 | if (ret_send < 0) { |
6d805429 | 929 | PERROR("send data pending ret code"); |
1803a064 | 930 | goto error_fatal; |
c8f59ee5 | 931 | } |
f50f23d9 DG |
932 | |
933 | /* | |
934 | * No need to send back a status message since the data pending | |
935 | * returned value is the response. | |
936 | */ | |
c8f59ee5 | 937 | break; |
53632229 | 938 | } |
6dc3064a DG |
939 | case LTTNG_CONSUMER_SNAPSHOT_CHANNEL: |
940 | { | |
3eb928aa | 941 | struct lttng_consumer_channel *channel; |
07c4863f | 942 | const uint64_t key = msg.u.snapshot_channel.key; |
0c5b3718 | 943 | int ret_send_status; |
3eb928aa MD |
944 | |
945 | channel = consumer_find_channel(key); | |
946 | if (!channel) { | |
947 | ERR("Channel %" PRIu64 " not found", key); | |
948 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
07b86b52 | 949 | } else { |
3eb928aa | 950 | if (msg.u.snapshot_channel.metadata == 1) { |
0c5b3718 SM |
951 | int ret_snapshot; |
952 | ||
953 | ret_snapshot = lttng_kconsumer_snapshot_metadata( | |
28ab034a JG |
954 | channel, |
955 | key, | |
956 | msg.u.snapshot_channel.pathname, | |
957 | msg.u.snapshot_channel.relayd_id, | |
958 | ctx); | |
0c5b3718 | 959 | if (ret_snapshot < 0) { |
3eb928aa MD |
960 | ERR("Snapshot metadata failed"); |
961 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
962 | } | |
963 | } else { | |
0c5b3718 SM |
964 | int ret_snapshot; |
965 | ||
966 | ret_snapshot = lttng_kconsumer_snapshot_channel( | |
28ab034a JG |
967 | channel, |
968 | key, | |
969 | msg.u.snapshot_channel.pathname, | |
970 | msg.u.snapshot_channel.relayd_id, | |
971 | msg.u.snapshot_channel.nb_packets_per_stream); | |
0c5b3718 | 972 | if (ret_snapshot < 0) { |
3eb928aa MD |
973 | ERR("Snapshot channel failed"); |
974 | ret_code = LTTCOMM_CONSUMERD_SNAPSHOT_FAILED; | |
975 | } | |
07b86b52 JD |
976 | } |
977 | } | |
9ce5646a MD |
978 | health_code_update(); |
979 | ||
0c5b3718 SM |
980 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
981 | if (ret_send_status < 0) { | |
6dc3064a DG |
982 | /* Somehow, the session daemon is not responding anymore. */ |
983 | goto end_nosignal; | |
984 | } | |
985 | break; | |
986 | } | |
07b86b52 JD |
987 | case LTTNG_CONSUMER_DESTROY_CHANNEL: |
988 | { | |
07c4863f | 989 | const uint64_t key = msg.u.destroy_channel.key; |
07b86b52 | 990 | struct lttng_consumer_channel *channel; |
0c5b3718 | 991 | int ret_send_status; |
07b86b52 JD |
992 | |
993 | channel = consumer_find_channel(key); | |
994 | if (!channel) { | |
995 | ERR("Kernel consumer destroy channel %" PRIu64 " not found", key); | |
e462382a | 996 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; |
07b86b52 JD |
997 | } |
998 | ||
9ce5646a MD |
999 | health_code_update(); |
1000 | ||
0c5b3718 SM |
1001 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1002 | if (ret_send_status < 0) { | |
07b86b52 | 1003 | /* Somehow, the session daemon is not responding anymore. */ |
a9d36096 | 1004 | goto end_destroy_channel; |
07b86b52 JD |
1005 | } |
1006 | ||
9ce5646a MD |
1007 | health_code_update(); |
1008 | ||
15dc512a DG |
1009 | /* Stop right now if no channel was found. */ |
1010 | if (!channel) { | |
a9d36096 | 1011 | goto end_destroy_channel; |
15dc512a DG |
1012 | } |
1013 | ||
07b86b52 JD |
1014 | /* |
1015 | * This command should ONLY be issued for channel with streams set in | |
1016 | * no monitor mode. | |
1017 | */ | |
a0377dfe | 1018 | LTTNG_ASSERT(!channel->monitor); |
07b86b52 JD |
1019 | |
1020 | /* | |
1021 | * The refcount should ALWAYS be 0 in the case of a channel in no | |
1022 | * monitor mode. | |
1023 | */ | |
a0377dfe | 1024 | LTTNG_ASSERT(!uatomic_sub_return(&channel->refcount, 1)); |
07b86b52 JD |
1025 | |
1026 | consumer_del_channel(channel); | |
28ab034a | 1027 | end_destroy_channel: |
07b86b52 JD |
1028 | goto end_nosignal; |
1029 | } | |
fb83fe64 JD |
1030 | case LTTNG_CONSUMER_DISCARDED_EVENTS: |
1031 | { | |
66ab32be JD |
1032 | ssize_t ret; |
1033 | uint64_t count; | |
fb83fe64 | 1034 | struct lttng_consumer_channel *channel; |
07c4863f JG |
1035 | const uint64_t id = msg.u.discarded_events.session_id; |
1036 | const uint64_t key = msg.u.discarded_events.channel_key; | |
fb83fe64 | 1037 | |
28ab034a JG |
1038 | DBG("Kernel consumer discarded events command for session id %" PRIu64 |
1039 | ", channel key %" PRIu64, | |
1040 | id, | |
1041 | key); | |
e5742757 | 1042 | |
fb83fe64 JD |
1043 | channel = consumer_find_channel(key); |
1044 | if (!channel) { | |
28ab034a | 1045 | ERR("Kernel consumer discarded events channel %" PRIu64 " not found", key); |
66ab32be | 1046 | count = 0; |
e5742757 | 1047 | } else { |
66ab32be | 1048 | count = channel->discarded_events; |
fb83fe64 JD |
1049 | } |
1050 | ||
fb83fe64 JD |
1051 | health_code_update(); |
1052 | ||
1053 | /* Send back returned value to session daemon */ | |
66ab32be | 1054 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1055 | if (ret < 0) { |
1056 | PERROR("send discarded events"); | |
1057 | goto error_fatal; | |
1058 | } | |
1059 | ||
1060 | break; | |
1061 | } | |
1062 | case LTTNG_CONSUMER_LOST_PACKETS: | |
1063 | { | |
66ab32be JD |
1064 | ssize_t ret; |
1065 | uint64_t count; | |
fb83fe64 | 1066 | struct lttng_consumer_channel *channel; |
07c4863f JG |
1067 | const uint64_t id = msg.u.lost_packets.session_id; |
1068 | const uint64_t key = msg.u.lost_packets.channel_key; | |
fb83fe64 | 1069 | |
28ab034a JG |
1070 | DBG("Kernel consumer lost packets command for session id %" PRIu64 |
1071 | ", channel key %" PRIu64, | |
1072 | id, | |
1073 | key); | |
e5742757 | 1074 | |
fb83fe64 JD |
1075 | channel = consumer_find_channel(key); |
1076 | if (!channel) { | |
28ab034a | 1077 | ERR("Kernel consumer lost packets channel %" PRIu64 " not found", key); |
66ab32be | 1078 | count = 0; |
e5742757 | 1079 | } else { |
66ab32be | 1080 | count = channel->lost_packets; |
fb83fe64 JD |
1081 | } |
1082 | ||
fb83fe64 JD |
1083 | health_code_update(); |
1084 | ||
1085 | /* Send back returned value to session daemon */ | |
66ab32be | 1086 | ret = lttcomm_send_unix_sock(sock, &count, sizeof(count)); |
fb83fe64 JD |
1087 | if (ret < 0) { |
1088 | PERROR("send lost packets"); | |
1089 | goto error_fatal; | |
1090 | } | |
1091 | ||
1092 | break; | |
1093 | } | |
b3530820 JG |
1094 | case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE: |
1095 | { | |
1096 | int channel_monitor_pipe; | |
0c5b3718 SM |
1097 | int ret_send_status, ret_set_channel_monitor_pipe; |
1098 | ssize_t ret_recv; | |
b3530820 JG |
1099 | |
1100 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1101 | /* Successfully received the command's type. */ | |
0c5b3718 SM |
1102 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1103 | if (ret_send_status < 0) { | |
b3530820 JG |
1104 | goto error_fatal; |
1105 | } | |
1106 | ||
28ab034a | 1107 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &channel_monitor_pipe, 1); |
0c5b3718 | 1108 | if (ret_recv != sizeof(channel_monitor_pipe)) { |
b3530820 JG |
1109 | ERR("Failed to receive channel monitor pipe"); |
1110 | goto error_fatal; | |
1111 | } | |
1112 | ||
1113 | DBG("Received channel monitor pipe (%d)", channel_monitor_pipe); | |
0c5b3718 | 1114 | ret_set_channel_monitor_pipe = |
28ab034a | 1115 | consumer_timer_thread_set_channel_monitor_pipe(channel_monitor_pipe); |
0c5b3718 | 1116 | if (!ret_set_channel_monitor_pipe) { |
b3530820 | 1117 | int flags; |
0c5b3718 | 1118 | int ret_fcntl; |
b3530820 JG |
1119 | |
1120 | ret_code = LTTCOMM_CONSUMERD_SUCCESS; | |
1121 | /* Set the pipe as non-blocking. */ | |
0c5b3718 SM |
1122 | ret_fcntl = fcntl(channel_monitor_pipe, F_GETFL, 0); |
1123 | if (ret_fcntl == -1) { | |
b3530820 JG |
1124 | PERROR("fcntl get flags of the channel monitoring pipe"); |
1125 | goto error_fatal; | |
1126 | } | |
0c5b3718 | 1127 | flags = ret_fcntl; |
b3530820 | 1128 | |
28ab034a | 1129 | ret_fcntl = fcntl(channel_monitor_pipe, F_SETFL, flags | O_NONBLOCK); |
0c5b3718 | 1130 | if (ret_fcntl == -1) { |
b3530820 JG |
1131 | PERROR("fcntl set O_NONBLOCK flag of the channel monitoring pipe"); |
1132 | goto error_fatal; | |
1133 | } | |
1134 | DBG("Channel monitor pipe set as non-blocking"); | |
1135 | } else { | |
1136 | ret_code = LTTCOMM_CONSUMERD_ALREADY_SET; | |
1137 | } | |
0c5b3718 SM |
1138 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1139 | if (ret_send_status < 0) { | |
b3530820 JG |
1140 | goto error_fatal; |
1141 | } | |
1142 | break; | |
1143 | } | |
b99a8d42 JD |
1144 | case LTTNG_CONSUMER_ROTATE_CHANNEL: |
1145 | { | |
92b7a7f8 | 1146 | struct lttng_consumer_channel *channel; |
07c4863f | 1147 | const uint64_t key = msg.u.rotate_channel.key; |
0c5b3718 | 1148 | int ret_send_status; |
b99a8d42 | 1149 | |
92b7a7f8 | 1150 | DBG("Consumer rotate channel %" PRIu64, key); |
b99a8d42 | 1151 | |
92b7a7f8 MD |
1152 | channel = consumer_find_channel(key); |
1153 | if (!channel) { | |
1154 | ERR("Channel %" PRIu64 " not found", key); | |
1155 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1156 | } else { | |
1157 | /* | |
1158 | * Sample the rotate position of all the streams in this channel. | |
1159 | */ | |
0c5b3718 SM |
1160 | int ret_rotate_channel; |
1161 | ||
1162 | ret_rotate_channel = lttng_consumer_rotate_channel( | |
28ab034a | 1163 | channel, key, msg.u.rotate_channel.relayd_id); |
0c5b3718 | 1164 | if (ret_rotate_channel < 0) { |
92b7a7f8 MD |
1165 | ERR("Rotate channel failed"); |
1166 | ret_code = LTTCOMM_CONSUMERD_ROTATION_FAIL; | |
1167 | } | |
b99a8d42 | 1168 | |
92b7a7f8 MD |
1169 | health_code_update(); |
1170 | } | |
0c5b3718 SM |
1171 | |
1172 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1173 | if (ret_send_status < 0) { | |
b99a8d42 | 1174 | /* Somehow, the session daemon is not responding anymore. */ |
713bdd26 | 1175 | goto error_rotate_channel; |
b99a8d42 | 1176 | } |
92b7a7f8 MD |
1177 | if (channel) { |
1178 | /* Rotate the streams that are ready right now. */ | |
0c5b3718 SM |
1179 | int ret_rotate; |
1180 | ||
28ab034a | 1181 | ret_rotate = lttng_consumer_rotate_ready_streams(channel, key); |
0c5b3718 | 1182 | if (ret_rotate < 0) { |
92b7a7f8 MD |
1183 | ERR("Rotate ready streams failed"); |
1184 | } | |
b99a8d42 | 1185 | } |
b99a8d42 | 1186 | break; |
28ab034a | 1187 | error_rotate_channel: |
713bdd26 | 1188 | goto end_nosignal; |
b99a8d42 | 1189 | } |
5f3aff8b MD |
1190 | case LTTNG_CONSUMER_CLEAR_CHANNEL: |
1191 | { | |
1192 | struct lttng_consumer_channel *channel; | |
07c4863f | 1193 | const uint64_t key = msg.u.clear_channel.key; |
0c5b3718 | 1194 | int ret_send_status; |
5f3aff8b MD |
1195 | |
1196 | channel = consumer_find_channel(key); | |
1197 | if (!channel) { | |
1198 | DBG("Channel %" PRIu64 " not found", key); | |
1199 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1200 | } else { | |
0c5b3718 SM |
1201 | int ret_clear_channel; |
1202 | ||
28ab034a | 1203 | ret_clear_channel = lttng_consumer_clear_channel(channel); |
0c5b3718 | 1204 | if (ret_clear_channel) { |
5f3aff8b | 1205 | ERR("Clear channel failed"); |
97535efa | 1206 | ret_code = (lttcomm_return_code) ret_clear_channel; |
5f3aff8b MD |
1207 | } |
1208 | ||
1209 | health_code_update(); | |
1210 | } | |
0c5b3718 SM |
1211 | |
1212 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1213 | if (ret_send_status < 0) { | |
5f3aff8b MD |
1214 | /* Somehow, the session daemon is not responding anymore. */ |
1215 | goto end_nosignal; | |
1216 | } | |
1217 | ||
1218 | break; | |
1219 | } | |
d2956687 | 1220 | case LTTNG_CONSUMER_INIT: |
00fb02ac | 1221 | { |
0c5b3718 | 1222 | int ret_send_status; |
328c2fe7 JG |
1223 | lttng_uuid sessiond_uuid; |
1224 | ||
28ab034a JG |
1225 | std::copy(std::begin(msg.u.init.sessiond_uuid), |
1226 | std::end(msg.u.init.sessiond_uuid), | |
1227 | sessiond_uuid.begin()); | |
0c5b3718 | 1228 | |
28ab034a | 1229 | ret_code = lttng_consumer_init_command(ctx, sessiond_uuid); |
00fb02ac | 1230 | health_code_update(); |
0c5b3718 SM |
1231 | ret_send_status = consumer_send_status_msg(sock, ret_code); |
1232 | if (ret_send_status < 0) { | |
00fb02ac JD |
1233 | /* Somehow, the session daemon is not responding anymore. */ |
1234 | goto end_nosignal; | |
1235 | } | |
1236 | break; | |
1237 | } | |
d2956687 | 1238 | case LTTNG_CONSUMER_CREATE_TRACE_CHUNK: |
d88744a4 | 1239 | { |
d2956687 | 1240 | const struct lttng_credentials credentials = { |
28ab034a JG |
1241 | .uid = LTTNG_OPTIONAL_INIT_VALUE( |
1242 | msg.u.create_trace_chunk.credentials.value.uid), | |
1243 | .gid = LTTNG_OPTIONAL_INIT_VALUE( | |
1244 | msg.u.create_trace_chunk.credentials.value.gid), | |
d2956687 | 1245 | }; |
28ab034a JG |
1246 | const bool is_local_trace = !msg.u.create_trace_chunk.relayd_id.is_set; |
1247 | const uint64_t relayd_id = msg.u.create_trace_chunk.relayd_id.value; | |
1248 | const char *chunk_override_name = *msg.u.create_trace_chunk.override_name ? | |
1249 | msg.u.create_trace_chunk.override_name : | |
cd9adb8b JG |
1250 | nullptr; |
1251 | struct lttng_directory_handle *chunk_directory_handle = nullptr; | |
d88744a4 | 1252 | |
d2956687 JG |
1253 | /* |
1254 | * The session daemon will only provide a chunk directory file | |
1255 | * descriptor for local traces. | |
1256 | */ | |
1257 | if (is_local_trace) { | |
1258 | int chunk_dirfd; | |
0c5b3718 SM |
1259 | int ret_send_status; |
1260 | ssize_t ret_recv; | |
19990ed5 | 1261 | |
d2956687 | 1262 | /* Acnowledge the reception of the command. */ |
28ab034a | 1263 | ret_send_status = consumer_send_status_msg(sock, LTTCOMM_CONSUMERD_SUCCESS); |
0c5b3718 | 1264 | if (ret_send_status < 0) { |
d2956687 JG |
1265 | /* Somehow, the session daemon is not responding anymore. */ |
1266 | goto end_nosignal; | |
1267 | } | |
92816cc3 | 1268 | |
28ab034a | 1269 | ret_recv = lttcomm_recv_fds_unix_sock(sock, &chunk_dirfd, 1); |
0c5b3718 | 1270 | if (ret_recv != sizeof(chunk_dirfd)) { |
d2956687 JG |
1271 | ERR("Failed to receive trace chunk directory file descriptor"); |
1272 | goto error_fatal; | |
1273 | } | |
92816cc3 | 1274 | |
28ab034a JG |
1275 | DBG("Received trace chunk directory fd (%d)", chunk_dirfd); |
1276 | chunk_directory_handle = | |
1277 | lttng_directory_handle_create_from_dirfd(chunk_dirfd); | |
cbf53d23 | 1278 | if (!chunk_directory_handle) { |
d2956687 JG |
1279 | ERR("Failed to initialize chunk directory handle from directory file descriptor"); |
1280 | if (close(chunk_dirfd)) { | |
1281 | PERROR("Failed to close chunk directory file descriptor"); | |
1282 | } | |
1283 | goto error_fatal; | |
1284 | } | |
92816cc3 JG |
1285 | } |
1286 | ||
d2956687 | 1287 | ret_code = lttng_consumer_create_trace_chunk( |
cd9adb8b | 1288 | !is_local_trace ? &relayd_id : nullptr, |
28ab034a JG |
1289 | msg.u.create_trace_chunk.session_id, |
1290 | msg.u.create_trace_chunk.chunk_id, | |
1291 | (time_t) msg.u.create_trace_chunk.creation_timestamp, | |
1292 | chunk_override_name, | |
cd9adb8b | 1293 | msg.u.create_trace_chunk.credentials.is_set ? &credentials : nullptr, |
28ab034a | 1294 | chunk_directory_handle); |
cbf53d23 | 1295 | lttng_directory_handle_put(chunk_directory_handle); |
d2956687 | 1296 | goto end_msg_sessiond; |
d88744a4 | 1297 | } |
d2956687 | 1298 | case LTTNG_CONSUMER_CLOSE_TRACE_CHUNK: |
a1ae2ea5 | 1299 | { |
bbc4768c | 1300 | enum lttng_trace_chunk_command_type close_command = |
28ab034a JG |
1301 | (lttng_trace_chunk_command_type) msg.u.close_trace_chunk.close_command.value; |
1302 | const uint64_t relayd_id = msg.u.close_trace_chunk.relayd_id.value; | |
ecd1a12f MD |
1303 | struct lttcomm_consumer_close_trace_chunk_reply reply; |
1304 | char path[LTTNG_PATH_MAX]; | |
0c5b3718 | 1305 | ssize_t ret_send; |
d2956687 JG |
1306 | |
1307 | ret_code = lttng_consumer_close_trace_chunk( | |
cd9adb8b | 1308 | msg.u.close_trace_chunk.relayd_id.is_set ? &relayd_id : nullptr, |
28ab034a JG |
1309 | msg.u.close_trace_chunk.session_id, |
1310 | msg.u.close_trace_chunk.chunk_id, | |
1311 | (time_t) msg.u.close_trace_chunk.close_timestamp, | |
cd9adb8b | 1312 | msg.u.close_trace_chunk.close_command.is_set ? &close_command : nullptr, |
28ab034a | 1313 | path); |
ecd1a12f MD |
1314 | reply.ret_code = ret_code; |
1315 | reply.path_length = strlen(path) + 1; | |
0c5b3718 SM |
1316 | ret_send = lttcomm_send_unix_sock(sock, &reply, sizeof(reply)); |
1317 | if (ret_send != sizeof(reply)) { | |
ecd1a12f MD |
1318 | goto error_fatal; |
1319 | } | |
28ab034a | 1320 | ret_send = lttcomm_send_unix_sock(sock, path, reply.path_length); |
0c5b3718 | 1321 | if (ret_send != reply.path_length) { |
ecd1a12f MD |
1322 | goto error_fatal; |
1323 | } | |
1324 | goto end_nosignal; | |
3654ed19 | 1325 | } |
d2956687 | 1326 | case LTTNG_CONSUMER_TRACE_CHUNK_EXISTS: |
3654ed19 | 1327 | { |
28ab034a | 1328 | const uint64_t relayd_id = msg.u.trace_chunk_exists.relayd_id.value; |
d2956687 JG |
1329 | |
1330 | ret_code = lttng_consumer_trace_chunk_exists( | |
cd9adb8b | 1331 | msg.u.trace_chunk_exists.relayd_id.is_set ? &relayd_id : nullptr, |
28ab034a JG |
1332 | msg.u.trace_chunk_exists.session_id, |
1333 | msg.u.trace_chunk_exists.chunk_id); | |
d2956687 | 1334 | goto end_msg_sessiond; |
a1ae2ea5 | 1335 | } |
04ed9e10 JG |
1336 | case LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS: |
1337 | { | |
1338 | const uint64_t key = msg.u.open_channel_packets.key; | |
28ab034a | 1339 | struct lttng_consumer_channel *channel = consumer_find_channel(key); |
04ed9e10 JG |
1340 | |
1341 | if (channel) { | |
1342 | pthread_mutex_lock(&channel->lock); | |
1343 | ret_code = lttng_consumer_open_channel_packets(channel); | |
1344 | pthread_mutex_unlock(&channel->lock); | |
1345 | } else { | |
1346 | WARN("Channel %" PRIu64 " not found", key); | |
1347 | ret_code = LTTCOMM_CONSUMERD_CHAN_NOT_FOUND; | |
1348 | } | |
1349 | ||
1350 | health_code_update(); | |
1351 | goto end_msg_sessiond; | |
1352 | } | |
3bd1e081 | 1353 | default: |
3f8e211f | 1354 | goto end_nosignal; |
3bd1e081 | 1355 | } |
3f8e211f | 1356 | |
3bd1e081 | 1357 | end_nosignal: |
4cbc1a04 DG |
1358 | /* |
1359 | * Return 1 to indicate success since the 0 value can be a socket | |
1360 | * shutdown during the recv() or send() call. | |
1361 | */ | |
0c5b3718 | 1362 | ret_func = 1; |
c5c7998f JG |
1363 | goto end; |
1364 | error_fatal: | |
1365 | /* This will issue a consumer stop. */ | |
0c5b3718 | 1366 | ret_func = -1; |
c5c7998f | 1367 | goto end; |
d2956687 JG |
1368 | end_msg_sessiond: |
1369 | /* | |
1370 | * The returned value here is not useful since either way we'll return 1 to | |
1371 | * the caller because the session daemon socket management is done | |
1372 | * elsewhere. Returning a negative code or 0 will shutdown the consumer. | |
1373 | */ | |
0c5b3718 SM |
1374 | { |
1375 | int ret_send_status; | |
1376 | ||
1377 | ret_send_status = consumer_send_status_msg(sock, ret_code); | |
1378 | if (ret_send_status < 0) { | |
1379 | goto error_fatal; | |
1380 | } | |
d2956687 | 1381 | } |
0c5b3718 SM |
1382 | |
1383 | ret_func = 1; | |
1384 | ||
c5c7998f | 1385 | end: |
d2956687 | 1386 | health_code_update(); |
0c5b3718 | 1387 | return ret_func; |
3bd1e081 | 1388 | } |
d41f73b7 | 1389 | |
94d49140 JD |
1390 | /* |
1391 | * Sync metadata meaning request them to the session daemon and snapshot to the | |
1392 | * metadata thread can consumer them. | |
1393 | * | |
1394 | * Metadata stream lock MUST be acquired. | |
94d49140 | 1395 | */ |
28ab034a | 1396 | enum sync_metadata_status lttng_kconsumer_sync_metadata(struct lttng_consumer_stream *metadata) |
94d49140 JD |
1397 | { |
1398 | int ret; | |
577eea73 | 1399 | enum sync_metadata_status status; |
94d49140 | 1400 | |
a0377dfe | 1401 | LTTNG_ASSERT(metadata); |
94d49140 JD |
1402 | |
1403 | ret = kernctl_buffer_flush(metadata->wait_fd); | |
1404 | if (ret < 0) { | |
1405 | ERR("Failed to flush kernel stream"); | |
577eea73 | 1406 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 JD |
1407 | goto end; |
1408 | } | |
1409 | ||
1410 | ret = kernctl_snapshot(metadata->wait_fd); | |
1411 | if (ret < 0) { | |
577eea73 JG |
1412 | if (errno == EAGAIN) { |
1413 | /* No new metadata, exit. */ | |
1414 | DBG("Sync metadata, no new kernel metadata"); | |
1415 | status = SYNC_METADATA_STATUS_NO_DATA; | |
1416 | } else { | |
94d49140 | 1417 | ERR("Sync metadata, taking kernel snapshot failed."); |
577eea73 | 1418 | status = SYNC_METADATA_STATUS_ERROR; |
94d49140 | 1419 | } |
577eea73 JG |
1420 | } else { |
1421 | status = SYNC_METADATA_STATUS_NEW_DATA; | |
94d49140 JD |
1422 | } |
1423 | ||
1424 | end: | |
577eea73 | 1425 | return status; |
94d49140 | 1426 | } |
309167d2 | 1427 | |
28ab034a JG |
1428 | static int extract_common_subbuffer_info(struct lttng_consumer_stream *stream, |
1429 | struct stream_subbuffer *subbuf) | |
fb83fe64 JD |
1430 | { |
1431 | int ret; | |
fb83fe64 | 1432 | |
28ab034a | 1433 | ret = kernctl_get_subbuf_size(stream->wait_fd, &subbuf->info.data.subbuf_size); |
6f9449c2 | 1434 | if (ret) { |
fb83fe64 JD |
1435 | goto end; |
1436 | } | |
fb83fe64 | 1437 | |
28ab034a JG |
1438 | ret = kernctl_get_padded_subbuf_size(stream->wait_fd, |
1439 | &subbuf->info.data.padded_subbuf_size); | |
6f9449c2 | 1440 | if (ret) { |
fb83fe64 JD |
1441 | goto end; |
1442 | } | |
fb83fe64 JD |
1443 | |
1444 | end: | |
1445 | return ret; | |
1446 | } | |
1447 | ||
28ab034a JG |
1448 | static int extract_metadata_subbuffer_info(struct lttng_consumer_stream *stream, |
1449 | struct stream_subbuffer *subbuf) | |
93ec662e JD |
1450 | { |
1451 | int ret; | |
93ec662e | 1452 | |
6f9449c2 JG |
1453 | ret = extract_common_subbuffer_info(stream, subbuf); |
1454 | if (ret) { | |
93ec662e JD |
1455 | goto end; |
1456 | } | |
1457 | ||
28ab034a | 1458 | ret = kernctl_get_metadata_version(stream->wait_fd, &subbuf->info.metadata.version); |
6f9449c2 | 1459 | if (ret) { |
93ec662e JD |
1460 | goto end; |
1461 | } | |
1462 | ||
93ec662e JD |
1463 | end: |
1464 | return ret; | |
1465 | } | |
1466 | ||
28ab034a JG |
1467 | static int extract_data_subbuffer_info(struct lttng_consumer_stream *stream, |
1468 | struct stream_subbuffer *subbuf) | |
d41f73b7 | 1469 | { |
6f9449c2 | 1470 | int ret; |
d41f73b7 | 1471 | |
6f9449c2 JG |
1472 | ret = extract_common_subbuffer_info(stream, subbuf); |
1473 | if (ret) { | |
1474 | goto end; | |
1475 | } | |
309167d2 | 1476 | |
28ab034a | 1477 | ret = kernctl_get_packet_size(stream->wait_fd, &subbuf->info.data.packet_size); |
6f9449c2 JG |
1478 | if (ret < 0) { |
1479 | PERROR("Failed to get sub-buffer packet size"); | |
1480 | goto end; | |
1481 | } | |
02d02e31 | 1482 | |
28ab034a | 1483 | ret = kernctl_get_content_size(stream->wait_fd, &subbuf->info.data.content_size); |
6f9449c2 JG |
1484 | if (ret < 0) { |
1485 | PERROR("Failed to get sub-buffer content size"); | |
1486 | goto end; | |
d41f73b7 MD |
1487 | } |
1488 | ||
28ab034a | 1489 | ret = kernctl_get_timestamp_begin(stream->wait_fd, &subbuf->info.data.timestamp_begin); |
6f9449c2 JG |
1490 | if (ret < 0) { |
1491 | PERROR("Failed to get sub-buffer begin timestamp"); | |
1492 | goto end; | |
1d4dfdef DG |
1493 | } |
1494 | ||
28ab034a | 1495 | ret = kernctl_get_timestamp_end(stream->wait_fd, &subbuf->info.data.timestamp_end); |
6f9449c2 JG |
1496 | if (ret < 0) { |
1497 | PERROR("Failed to get sub-buffer end timestamp"); | |
1498 | goto end; | |
1499 | } | |
1500 | ||
28ab034a | 1501 | ret = kernctl_get_events_discarded(stream->wait_fd, &subbuf->info.data.events_discarded); |
6f9449c2 JG |
1502 | if (ret) { |
1503 | PERROR("Failed to get sub-buffer events discarded count"); | |
1504 | goto end; | |
1505 | } | |
1506 | ||
1507 | ret = kernctl_get_sequence_number(stream->wait_fd, | |
28ab034a | 1508 | &subbuf->info.data.sequence_number.value); |
6f9449c2 JG |
1509 | if (ret) { |
1510 | /* May not be supported by older LTTng-modules. */ | |
1511 | if (ret != -ENOTTY) { | |
1512 | PERROR("Failed to get sub-buffer sequence number"); | |
1513 | goto end; | |
fb83fe64 | 1514 | } |
1c20f0e2 | 1515 | } else { |
6f9449c2 | 1516 | subbuf->info.data.sequence_number.is_set = true; |
309167d2 JD |
1517 | } |
1518 | ||
28ab034a | 1519 | ret = kernctl_get_stream_id(stream->wait_fd, &subbuf->info.data.stream_id); |
6f9449c2 JG |
1520 | if (ret < 0) { |
1521 | PERROR("Failed to get stream id"); | |
1522 | goto end; | |
1523 | } | |
1d4dfdef | 1524 | |
28ab034a | 1525 | ret = kernctl_get_instance_id(stream->wait_fd, &subbuf->info.data.stream_instance_id.value); |
6f9449c2 JG |
1526 | if (ret) { |
1527 | /* May not be supported by older LTTng-modules. */ | |
1528 | if (ret != -ENOTTY) { | |
1529 | PERROR("Failed to get stream instance id"); | |
1530 | goto end; | |
1d4dfdef | 1531 | } |
6f9449c2 JG |
1532 | } else { |
1533 | subbuf->info.data.stream_instance_id.is_set = true; | |
1534 | } | |
1535 | end: | |
1536 | return ret; | |
1537 | } | |
47e81c02 | 1538 | |
28ab034a JG |
1539 | static enum get_next_subbuffer_status get_subbuffer_common(struct lttng_consumer_stream *stream, |
1540 | struct stream_subbuffer *subbuffer) | |
6f9449c2 JG |
1541 | { |
1542 | int ret; | |
b6797c8e | 1543 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1544 | |
1545 | ret = kernctl_get_next_subbuf(stream->wait_fd); | |
b6797c8e JG |
1546 | switch (ret) { |
1547 | case 0: | |
1548 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1549 | break; | |
1550 | case -ENODATA: | |
28ab034a | 1551 | case -EAGAIN: |
6e5e3c51 MD |
1552 | /* |
1553 | * The caller only expects -ENODATA when there is no data to | |
1554 | * read, but the kernel tracer returns -EAGAIN when there is | |
1555 | * currently no data for a non-finalized stream, and -ENODATA | |
1556 | * when there is no data for a finalized stream. Those can be | |
1557 | * combined into a -ENODATA return value. | |
1558 | */ | |
b6797c8e JG |
1559 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; |
1560 | goto end; | |
1561 | default: | |
1562 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
6f9449c2 JG |
1563 | goto end; |
1564 | } | |
1565 | ||
28ab034a | 1566 | ret = stream->read_subbuffer_ops.extract_subbuffer_info(stream, subbuffer); |
b6797c8e JG |
1567 | if (ret) { |
1568 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1569 | } | |
6f9449c2 | 1570 | end: |
b6797c8e | 1571 | return status; |
6f9449c2 | 1572 | } |
128708c3 | 1573 | |
28ab034a JG |
1574 | static enum get_next_subbuffer_status |
1575 | get_next_subbuffer_splice(struct lttng_consumer_stream *stream, struct stream_subbuffer *subbuffer) | |
6f9449c2 | 1576 | { |
28ab034a | 1577 | const enum get_next_subbuffer_status status = get_subbuffer_common(stream, subbuffer); |
1d4dfdef | 1578 | |
b6797c8e | 1579 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { |
6f9449c2 JG |
1580 | goto end; |
1581 | } | |
1d4dfdef | 1582 | |
6f9449c2 JG |
1583 | subbuffer->buffer.fd = stream->wait_fd; |
1584 | end: | |
b6797c8e | 1585 | return status; |
6f9449c2 | 1586 | } |
fd424d99 | 1587 | |
28ab034a JG |
1588 | static enum get_next_subbuffer_status get_next_subbuffer_mmap(struct lttng_consumer_stream *stream, |
1589 | struct stream_subbuffer *subbuffer) | |
6f9449c2 JG |
1590 | { |
1591 | int ret; | |
b6797c8e | 1592 | enum get_next_subbuffer_status status; |
6f9449c2 JG |
1593 | const char *addr; |
1594 | ||
b6797c8e JG |
1595 | status = get_subbuffer_common(stream, subbuffer); |
1596 | if (status != GET_NEXT_SUBBUFFER_STATUS_OK) { | |
6f9449c2 | 1597 | goto end; |
128708c3 | 1598 | } |
6f9449c2 JG |
1599 | |
1600 | ret = get_current_subbuf_addr(stream, &addr); | |
1601 | if (ret) { | |
b6797c8e | 1602 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; |
6f9449c2 | 1603 | goto end; |
d41f73b7 | 1604 | } |
6f9449c2 | 1605 | |
28ab034a JG |
1606 | subbuffer->buffer.buffer = |
1607 | lttng_buffer_view_init(addr, 0, subbuffer->info.data.padded_subbuf_size); | |
6f9449c2 | 1608 | end: |
b6797c8e | 1609 | return status; |
6f9449c2 JG |
1610 | } |
1611 | ||
28ab034a JG |
1612 | static enum get_next_subbuffer_status |
1613 | get_next_subbuffer_metadata_check(struct lttng_consumer_stream *stream, | |
1614 | struct stream_subbuffer *subbuffer) | |
f5ba75b4 JG |
1615 | { |
1616 | int ret; | |
1617 | const char *addr; | |
1618 | bool coherent; | |
b6797c8e | 1619 | enum get_next_subbuffer_status status; |
f5ba75b4 | 1620 | |
28ab034a | 1621 | ret = kernctl_get_next_subbuf_metadata_check(stream->wait_fd, &coherent); |
f5ba75b4 JG |
1622 | if (ret) { |
1623 | goto end; | |
1624 | } | |
1625 | ||
28ab034a | 1626 | ret = stream->read_subbuffer_ops.extract_subbuffer_info(stream, subbuffer); |
f5ba75b4 JG |
1627 | if (ret) { |
1628 | goto end; | |
1629 | } | |
1630 | ||
1631 | LTTNG_OPTIONAL_SET(&subbuffer->info.metadata.coherent, coherent); | |
1632 | ||
1633 | ret = get_current_subbuf_addr(stream, &addr); | |
1634 | if (ret) { | |
1635 | goto end; | |
1636 | } | |
1637 | ||
28ab034a JG |
1638 | subbuffer->buffer.buffer = |
1639 | lttng_buffer_view_init(addr, 0, subbuffer->info.data.padded_subbuf_size); | |
f5ba75b4 | 1640 | DBG("Got metadata packet with padded_subbuf_size = %lu, coherent = %s", |
28ab034a JG |
1641 | subbuffer->info.metadata.padded_subbuf_size, |
1642 | coherent ? "true" : "false"); | |
f5ba75b4 | 1643 | end: |
6e5e3c51 MD |
1644 | /* |
1645 | * The caller only expects -ENODATA when there is no data to read, but | |
1646 | * the kernel tracer returns -EAGAIN when there is currently no data | |
1647 | * for a non-finalized stream, and -ENODATA when there is no data for a | |
1648 | * finalized stream. Those can be combined into a -ENODATA return value. | |
1649 | */ | |
b6797c8e JG |
1650 | switch (ret) { |
1651 | case 0: | |
1652 | status = GET_NEXT_SUBBUFFER_STATUS_OK; | |
1653 | break; | |
1654 | case -ENODATA: | |
1655 | case -EAGAIN: | |
1656 | /* | |
1657 | * The caller only expects -ENODATA when there is no data to | |
1658 | * read, but the kernel tracer returns -EAGAIN when there is | |
1659 | * currently no data for a non-finalized stream, and -ENODATA | |
1660 | * when there is no data for a finalized stream. Those can be | |
1661 | * combined into a -ENODATA return value. | |
1662 | */ | |
1663 | status = GET_NEXT_SUBBUFFER_STATUS_NO_DATA; | |
1664 | break; | |
1665 | default: | |
1666 | status = GET_NEXT_SUBBUFFER_STATUS_ERROR; | |
1667 | break; | |
6e5e3c51 MD |
1668 | } |
1669 | ||
b6797c8e | 1670 | return status; |
f5ba75b4 JG |
1671 | } |
1672 | ||
28ab034a JG |
1673 | static int put_next_subbuffer(struct lttng_consumer_stream *stream, |
1674 | struct stream_subbuffer *subbuffer __attribute__((unused))) | |
6f9449c2 JG |
1675 | { |
1676 | const int ret = kernctl_put_next_subbuf(stream->wait_fd); | |
1677 | ||
1678 | if (ret) { | |
1679 | if (ret == -EFAULT) { | |
1680 | PERROR("Error in unreserving sub buffer"); | |
1681 | } else if (ret == -EIO) { | |
d41f73b7 | 1682 | /* Should never happen with newer LTTng versions */ |
6f9449c2 | 1683 | PERROR("Reader has been pushed by the writer, last sub-buffer corrupted"); |
d41f73b7 | 1684 | } |
d41f73b7 MD |
1685 | } |
1686 | ||
6f9449c2 JG |
1687 | return ret; |
1688 | } | |
1c20f0e2 | 1689 | |
28ab034a | 1690 | static bool is_get_next_check_metadata_available(int tracer_fd) |
f5ba75b4 | 1691 | { |
cd9adb8b | 1692 | const int ret = kernctl_get_next_subbuf_metadata_check(tracer_fd, nullptr); |
741e787b JG |
1693 | const bool available = ret != -ENOTTY; |
1694 | ||
1695 | if (ret == 0) { | |
1696 | /* get succeeded, make sure to put the subbuffer. */ | |
1697 | kernctl_put_subbuf(tracer_fd); | |
1698 | } | |
1699 | ||
1700 | return available; | |
f5ba75b4 JG |
1701 | } |
1702 | ||
28ab034a JG |
1703 | static int signal_metadata(struct lttng_consumer_stream *stream, |
1704 | struct lttng_consumer_local_data *ctx __attribute__((unused))) | |
091441eb MD |
1705 | { |
1706 | ASSERT_LOCKED(stream->metadata_rdv_lock); | |
1707 | return pthread_cond_broadcast(&stream->metadata_rdv) ? -errno : 0; | |
1708 | } | |
1709 | ||
28ab034a | 1710 | static int lttng_kconsumer_set_stream_ops(struct lttng_consumer_stream *stream) |
6f9449c2 | 1711 | { |
f5ba75b4 JG |
1712 | int ret = 0; |
1713 | ||
1714 | if (stream->metadata_flag && stream->chan->is_live) { | |
1715 | DBG("Attempting to enable metadata bucketization for live consumers"); | |
1716 | if (is_get_next_check_metadata_available(stream->wait_fd)) { | |
1717 | DBG("Kernel tracer supports get_next_subbuffer_metadata_check, metadata will be accumulated until a coherent state is reached"); | |
1718 | stream->read_subbuffer_ops.get_next_subbuffer = | |
28ab034a JG |
1719 | get_next_subbuffer_metadata_check; |
1720 | ret = consumer_stream_enable_metadata_bucketization(stream); | |
f5ba75b4 JG |
1721 | if (ret) { |
1722 | goto end; | |
1723 | } | |
1724 | } else { | |
1725 | /* | |
1726 | * The kernel tracer version is too old to indicate | |
1727 | * when the metadata stream has reached a "coherent" | |
1728 | * (parseable) point. | |
1729 | * | |
1730 | * This means that a live viewer may see an incoherent | |
1731 | * sequence of metadata and fail to parse it. | |
1732 | */ | |
1733 | WARN("Kernel tracer does not support get_next_subbuffer_metadata_check which may cause live clients to fail to parse the metadata stream"); | |
1734 | metadata_bucket_destroy(stream->metadata_bucket); | |
cd9adb8b | 1735 | stream->metadata_bucket = nullptr; |
f5ba75b4 | 1736 | } |
091441eb MD |
1737 | |
1738 | stream->read_subbuffer_ops.on_sleep = signal_metadata; | |
f5ba75b4 JG |
1739 | } |
1740 | ||
1741 | if (!stream->read_subbuffer_ops.get_next_subbuffer) { | |
1742 | if (stream->chan->output == CONSUMER_CHANNEL_MMAP) { | |
28ab034a | 1743 | stream->read_subbuffer_ops.get_next_subbuffer = get_next_subbuffer_mmap; |
f5ba75b4 | 1744 | } else { |
28ab034a | 1745 | stream->read_subbuffer_ops.get_next_subbuffer = get_next_subbuffer_splice; |
f5ba75b4 | 1746 | } |
94d49140 JD |
1747 | } |
1748 | ||
6f9449c2 | 1749 | if (stream->metadata_flag) { |
28ab034a | 1750 | stream->read_subbuffer_ops.extract_subbuffer_info = extract_metadata_subbuffer_info; |
6f9449c2 | 1751 | } else { |
28ab034a | 1752 | stream->read_subbuffer_ops.extract_subbuffer_info = extract_data_subbuffer_info; |
6f9449c2 | 1753 | if (stream->chan->is_live) { |
28ab034a | 1754 | stream->read_subbuffer_ops.send_live_beacon = consumer_flush_kernel_index; |
6f9449c2 | 1755 | } |
309167d2 JD |
1756 | } |
1757 | ||
6f9449c2 | 1758 | stream->read_subbuffer_ops.put_next_subbuffer = put_next_subbuffer; |
f5ba75b4 JG |
1759 | end: |
1760 | return ret; | |
d41f73b7 MD |
1761 | } |
1762 | ||
1763 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream) | |
1764 | { | |
1765 | int ret; | |
ffe60014 | 1766 | |
a0377dfe | 1767 | LTTNG_ASSERT(stream); |
ffe60014 | 1768 | |
2bba9e53 | 1769 | /* |
d2956687 JG |
1770 | * Don't create anything if this is set for streaming or if there is |
1771 | * no current trace chunk on the parent channel. | |
2bba9e53 | 1772 | */ |
d2956687 | 1773 | if (stream->net_seq_idx == (uint64_t) -1ULL && stream->chan->monitor && |
28ab034a | 1774 | stream->chan->trace_chunk) { |
d2956687 JG |
1775 | ret = consumer_stream_create_output_files(stream, true); |
1776 | if (ret) { | |
fe4477ee JD |
1777 | goto error; |
1778 | } | |
ffe60014 | 1779 | } |
d41f73b7 | 1780 | |
d41f73b7 MD |
1781 | if (stream->output == LTTNG_EVENT_MMAP) { |
1782 | /* get the len of the mmap region */ | |
1783 | unsigned long mmap_len; | |
1784 | ||
1785 | ret = kernctl_get_mmap_len(stream->wait_fd, &mmap_len); | |
1786 | if (ret != 0) { | |
ffe60014 | 1787 | PERROR("kernctl_get_mmap_len"); |
d41f73b7 MD |
1788 | goto error_close_fd; |
1789 | } | |
1790 | stream->mmap_len = (size_t) mmap_len; | |
1791 | ||
28ab034a | 1792 | stream->mmap_base = |
cd9adb8b | 1793 | mmap(nullptr, stream->mmap_len, PROT_READ, MAP_PRIVATE, stream->wait_fd, 0); |
d41f73b7 | 1794 | if (stream->mmap_base == MAP_FAILED) { |
ffe60014 | 1795 | PERROR("Error mmaping"); |
d41f73b7 MD |
1796 | ret = -1; |
1797 | goto error_close_fd; | |
1798 | } | |
1799 | } | |
1800 | ||
f5ba75b4 JG |
1801 | ret = lttng_kconsumer_set_stream_ops(stream); |
1802 | if (ret) { | |
1803 | goto error_close_fd; | |
1804 | } | |
6f9449c2 | 1805 | |
d41f73b7 MD |
1806 | /* we return 0 to let the library handle the FD internally */ |
1807 | return 0; | |
1808 | ||
1809 | error_close_fd: | |
2f225ce2 | 1810 | if (stream->out_fd >= 0) { |
d41f73b7 MD |
1811 | int err; |
1812 | ||
1813 | err = close(stream->out_fd); | |
a0377dfe | 1814 | LTTNG_ASSERT(!err); |
2f225ce2 | 1815 | stream->out_fd = -1; |
d41f73b7 MD |
1816 | } |
1817 | error: | |
1818 | return ret; | |
1819 | } | |
1820 | ||
ca22feea DG |
1821 | /* |
1822 | * Check if data is still being extracted from the buffers for a specific | |
4e9a4686 DG |
1823 | * stream. Consumer data lock MUST be acquired before calling this function |
1824 | * and the stream lock. | |
ca22feea | 1825 | * |
6d805429 | 1826 | * Return 1 if the traced data are still getting read else 0 meaning that the |
ca22feea DG |
1827 | * data is available for trace viewer reading. |
1828 | */ | |
6d805429 | 1829 | int lttng_kconsumer_data_pending(struct lttng_consumer_stream *stream) |
ca22feea DG |
1830 | { |
1831 | int ret; | |
1832 | ||
a0377dfe | 1833 | LTTNG_ASSERT(stream); |
ca22feea | 1834 | |
873b9e9a MD |
1835 | if (stream->endpoint_status != CONSUMER_ENDPOINT_ACTIVE) { |
1836 | ret = 0; | |
1837 | goto end; | |
1838 | } | |
1839 | ||
ca22feea DG |
1840 | ret = kernctl_get_next_subbuf(stream->wait_fd); |
1841 | if (ret == 0) { | |
1842 | /* There is still data so let's put back this subbuffer. */ | |
1843 | ret = kernctl_put_subbuf(stream->wait_fd); | |
a0377dfe | 1844 | LTTNG_ASSERT(ret == 0); |
28ab034a | 1845 | ret = 1; /* Data is pending */ |
4e9a4686 | 1846 | goto end; |
ca22feea DG |
1847 | } |
1848 | ||
6d805429 DG |
1849 | /* Data is NOT pending and ready to be read. */ |
1850 | ret = 0; | |
ca22feea | 1851 | |
6efae65e DG |
1852 | end: |
1853 | return ret; | |
ca22feea | 1854 | } |