Commit | Line | Data |
---|---|---|
d3e2ba59 | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com> |
3 | * Copyright (C) 2013 David Goulet <dgoulet@efficios.com> | |
4 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
d3e2ba59 | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
d3e2ba59 | 7 | * |
d3e2ba59 JD |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
8bb66c3c | 11 | #include <fcntl.h> |
d3e2ba59 JD |
12 | #include <getopt.h> |
13 | #include <grp.h> | |
8bb66c3c | 14 | #include <inttypes.h> |
d3e2ba59 JD |
15 | #include <limits.h> |
16 | #include <pthread.h> | |
17 | #include <signal.h> | |
18 | #include <stdio.h> | |
19 | #include <stdlib.h> | |
20 | #include <string.h> | |
21 | #include <sys/mman.h> | |
22 | #include <sys/mount.h> | |
23 | #include <sys/resource.h> | |
24 | #include <sys/socket.h> | |
25 | #include <sys/stat.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/wait.h> | |
8bb66c3c | 28 | #include <unistd.h> |
d3e2ba59 | 29 | #include <urcu/futex.h> |
7591bab1 | 30 | #include <urcu/rculist.h> |
8bb66c3c | 31 | #include <urcu/uatomic.h> |
d3e2ba59 | 32 | |
d3e2ba59 | 33 | #include <common/common.h> |
8bb66c3c | 34 | #include <common/compat/endian.h> |
d3e2ba59 JD |
35 | #include <common/compat/poll.h> |
36 | #include <common/compat/socket.h> | |
37 | #include <common/defaults.h> | |
8bb66c3c JG |
38 | #include <common/fd-tracker/utils.h> |
39 | #include <common/fs-handle.h> | |
d3e2ba59 | 40 | #include <common/futex.h> |
2f8f53af | 41 | #include <common/index/index.h> |
d3e2ba59 JD |
42 | #include <common/sessiond-comm/inet.h> |
43 | #include <common/sessiond-comm/relayd.h> | |
8bb66c3c | 44 | #include <common/sessiond-comm/sessiond-comm.h> |
d3e2ba59 JD |
45 | #include <common/uri.h> |
46 | #include <common/utils.h> | |
8bb66c3c | 47 | #include <lttng/lttng.h> |
d3e2ba59 JD |
48 | |
49 | #include "cmd.h" | |
8bb66c3c JG |
50 | #include "connection.h" |
51 | #include "ctf-trace.h" | |
52 | #include "health-relayd.h" | |
d3e2ba59 JD |
53 | #include "live.h" |
54 | #include "lttng-relayd.h" | |
2a174661 | 55 | #include "session.h" |
8bb66c3c JG |
56 | #include "stream.h" |
57 | #include "testpoint.h" | |
58 | #include "utils.h" | |
7591bab1 | 59 | #include "viewer-session.h" |
8bb66c3c | 60 | #include "viewer-stream.h" |
7591bab1 MD |
61 | |
62 | #define SESSION_BUF_DEFAULT_COUNT 16 | |
d3e2ba59 JD |
63 | |
64 | static struct lttng_uri *live_uri; | |
65 | ||
d3e2ba59 JD |
66 | /* |
67 | * This pipe is used to inform the worker thread that a command is queued and | |
68 | * ready to be processed. | |
69 | */ | |
58eb9381 | 70 | static int live_conn_pipe[2] = { -1, -1 }; |
d3e2ba59 JD |
71 | |
72 | /* Shared between threads */ | |
73 | static int live_dispatch_thread_exit; | |
74 | ||
75 | static pthread_t live_listener_thread; | |
76 | static pthread_t live_dispatcher_thread; | |
77 | static pthread_t live_worker_thread; | |
78 | ||
79 | /* | |
80 | * Relay command queue. | |
81 | * | |
82 | * The live_thread_listener and live_thread_dispatcher communicate with this | |
83 | * queue. | |
84 | */ | |
58eb9381 | 85 | static struct relay_conn_queue viewer_conn_queue; |
d3e2ba59 JD |
86 | |
87 | static uint64_t last_relay_viewer_session_id; | |
7591bab1 MD |
88 | static pthread_mutex_t last_relay_viewer_session_id_lock = |
89 | PTHREAD_MUTEX_INITIALIZER; | |
d3e2ba59 JD |
90 | |
91 | /* | |
92 | * Cleanup the daemon | |
93 | */ | |
94 | static | |
178a0557 | 95 | void cleanup_relayd_live(void) |
d3e2ba59 JD |
96 | { |
97 | DBG("Cleaning up"); | |
98 | ||
d3e2ba59 JD |
99 | free(live_uri); |
100 | } | |
101 | ||
2f8f53af DG |
102 | /* |
103 | * Receive a request buffer using a given socket, destination allocated buffer | |
104 | * of length size. | |
105 | * | |
106 | * Return the size of the received message or else a negative value on error | |
107 | * with errno being set by recvmsg() syscall. | |
108 | */ | |
109 | static | |
110 | ssize_t recv_request(struct lttcomm_sock *sock, void *buf, size_t size) | |
111 | { | |
112 | ssize_t ret; | |
113 | ||
2f8f53af DG |
114 | ret = sock->ops->recvmsg(sock, buf, size, 0); |
115 | if (ret < 0 || ret != size) { | |
116 | if (ret == 0) { | |
117 | /* Orderly shutdown. Not necessary to print an error. */ | |
118 | DBG("Socket %d did an orderly shutdown", sock->fd); | |
119 | } else { | |
120 | ERR("Relay failed to receive request."); | |
121 | } | |
122 | ret = -1; | |
123 | } | |
124 | ||
125 | return ret; | |
126 | } | |
127 | ||
128 | /* | |
129 | * Send a response buffer using a given socket, source allocated buffer of | |
130 | * length size. | |
131 | * | |
132 | * Return the size of the sent message or else a negative value on error with | |
133 | * errno being set by sendmsg() syscall. | |
134 | */ | |
135 | static | |
136 | ssize_t send_response(struct lttcomm_sock *sock, void *buf, size_t size) | |
137 | { | |
138 | ssize_t ret; | |
139 | ||
2f8f53af DG |
140 | ret = sock->ops->sendmsg(sock, buf, size, 0); |
141 | if (ret < 0) { | |
142 | ERR("Relayd failed to send response."); | |
143 | } | |
144 | ||
145 | return ret; | |
146 | } | |
147 | ||
148 | /* | |
f04a971b JD |
149 | * Atomically check if new streams got added in one of the sessions attached |
150 | * and reset the flag to 0. | |
2f8f53af DG |
151 | * |
152 | * Returns 1 if new streams got added, 0 if nothing changed, a negative value | |
153 | * on error. | |
154 | */ | |
155 | static | |
f04a971b | 156 | int check_new_streams(struct relay_connection *conn) |
2f8f53af | 157 | { |
2f8f53af | 158 | struct relay_session *session; |
f04a971b JD |
159 | unsigned long current_val; |
160 | int ret = 0; | |
2f8f53af | 161 | |
f04a971b JD |
162 | if (!conn->viewer_session) { |
163 | goto end; | |
164 | } | |
7591bab1 MD |
165 | rcu_read_lock(); |
166 | cds_list_for_each_entry_rcu(session, | |
167 | &conn->viewer_session->session_list, | |
168 | viewer_session_node) { | |
169 | if (!session_get(session)) { | |
170 | continue; | |
171 | } | |
f04a971b JD |
172 | current_val = uatomic_cmpxchg(&session->new_streams, 1, 0); |
173 | ret = current_val; | |
7591bab1 | 174 | session_put(session); |
f04a971b JD |
175 | if (ret == 1) { |
176 | goto end; | |
177 | } | |
2f8f53af | 178 | } |
f04a971b | 179 | end: |
7591bab1 | 180 | rcu_read_unlock(); |
2f8f53af DG |
181 | return ret; |
182 | } | |
183 | ||
184 | /* | |
185 | * Send viewer streams to the given socket. The ignore_sent_flag indicates if | |
186 | * this function should ignore the sent flag or not. | |
187 | * | |
188 | * Return 0 on success or else a negative value. | |
189 | */ | |
190 | static | |
191 | ssize_t send_viewer_streams(struct lttcomm_sock *sock, | |
c06fdd95 | 192 | uint64_t session_id, unsigned int ignore_sent_flag) |
2f8f53af DG |
193 | { |
194 | ssize_t ret; | |
195 | struct lttng_viewer_stream send_stream; | |
196 | struct lttng_ht_iter iter; | |
197 | struct relay_viewer_stream *vstream; | |
198 | ||
2f8f53af DG |
199 | rcu_read_lock(); |
200 | ||
201 | cds_lfht_for_each_entry(viewer_streams_ht->ht, &iter.iter, vstream, | |
202 | stream_n.node) { | |
2a174661 DG |
203 | struct ctf_trace *ctf_trace; |
204 | ||
2f8f53af DG |
205 | health_code_update(); |
206 | ||
7591bab1 MD |
207 | if (!viewer_stream_get(vstream)) { |
208 | continue; | |
209 | } | |
210 | ||
211 | pthread_mutex_lock(&vstream->stream->lock); | |
2f8f53af | 212 | /* Ignore if not the same session. */ |
c06fdd95 | 213 | if (vstream->stream->trace->session->id != session_id || |
2f8f53af | 214 | (!ignore_sent_flag && vstream->sent_flag)) { |
7591bab1 MD |
215 | pthread_mutex_unlock(&vstream->stream->lock); |
216 | viewer_stream_put(vstream); | |
2f8f53af DG |
217 | continue; |
218 | } | |
219 | ||
7591bab1 MD |
220 | ctf_trace = vstream->stream->trace; |
221 | send_stream.id = htobe64(vstream->stream->stream_handle); | |
2a174661 | 222 | send_stream.ctf_trace_id = htobe64(ctf_trace->id); |
7591bab1 MD |
223 | send_stream.metadata_flag = htobe32( |
224 | vstream->stream->is_metadata); | |
f8f011fb MD |
225 | if (lttng_strncpy(send_stream.path_name, vstream->path_name, |
226 | sizeof(send_stream.path_name))) { | |
227 | pthread_mutex_unlock(&vstream->stream->lock); | |
228 | viewer_stream_put(vstream); | |
229 | ret = -1; /* Error. */ | |
230 | goto end_unlock; | |
231 | } | |
232 | if (lttng_strncpy(send_stream.channel_name, | |
233 | vstream->channel_name, | |
234 | sizeof(send_stream.channel_name))) { | |
235 | pthread_mutex_unlock(&vstream->stream->lock); | |
236 | viewer_stream_put(vstream); | |
237 | ret = -1; /* Error. */ | |
238 | goto end_unlock; | |
239 | } | |
2f8f53af | 240 | |
7591bab1 MD |
241 | DBG("Sending stream %" PRIu64 " to viewer", |
242 | vstream->stream->stream_handle); | |
243 | vstream->sent_flag = 1; | |
244 | pthread_mutex_unlock(&vstream->stream->lock); | |
245 | ||
2f8f53af | 246 | ret = send_response(sock, &send_stream, sizeof(send_stream)); |
7591bab1 | 247 | viewer_stream_put(vstream); |
2f8f53af DG |
248 | if (ret < 0) { |
249 | goto end_unlock; | |
250 | } | |
2f8f53af DG |
251 | } |
252 | ||
253 | ret = 0; | |
254 | ||
255 | end_unlock: | |
256 | rcu_read_unlock(); | |
257 | return ret; | |
258 | } | |
259 | ||
260 | /* | |
261 | * Create every viewer stream possible for the given session with the seek | |
262 | * type. Three counters *can* be return which are in order the total amount of | |
263 | * viewer stream of the session, the number of unsent stream and the number of | |
264 | * stream created. Those counters can be NULL and thus will be ignored. | |
265 | * | |
c06fdd95 JG |
266 | * session must be locked to ensure that we see either none or all initial |
267 | * streams for a session, but no intermediate state.. | |
268 | * | |
2f8f53af DG |
269 | * Return 0 on success or else a negative value. |
270 | */ | |
b66a15d1 JG |
271 | static int make_viewer_streams(struct relay_session *session, |
272 | struct lttng_trace_chunk *viewer_trace_chunk, | |
273 | enum lttng_viewer_seek seek_t, | |
274 | uint32_t *nb_total, | |
275 | uint32_t *nb_unsent, | |
276 | uint32_t *nb_created, | |
277 | bool *closed) | |
2f8f53af DG |
278 | { |
279 | int ret; | |
2f8f53af | 280 | struct lttng_ht_iter iter; |
2a174661 | 281 | struct ctf_trace *ctf_trace; |
2f8f53af DG |
282 | |
283 | assert(session); | |
c06fdd95 | 284 | ASSERT_LOCKED(session->lock); |
2f8f53af | 285 | |
dbd6665b JG |
286 | if (!viewer_trace_chunk) { |
287 | ERR("Internal error: viewer session associated with session \"%s\" has a NULL trace chunk", | |
288 | session->session_name); | |
289 | ret = -1; | |
290 | goto error; | |
291 | } | |
292 | ||
bddf80e4 MD |
293 | if (session->connection_closed) { |
294 | *closed = true; | |
295 | } | |
296 | ||
2f8f53af | 297 | /* |
7591bab1 MD |
298 | * Create viewer streams for relay streams that are ready to be |
299 | * used for a the given session id only. | |
2f8f53af | 300 | */ |
2a174661 DG |
301 | rcu_read_lock(); |
302 | cds_lfht_for_each_entry(session->ctf_traces_ht->ht, &iter.iter, ctf_trace, | |
303 | node.node) { | |
123ed7c2 | 304 | bool trace_has_metadata_stream = false; |
2a174661 | 305 | struct relay_stream *stream; |
2f8f53af DG |
306 | |
307 | health_code_update(); | |
308 | ||
7591bab1 | 309 | if (!ctf_trace_get(ctf_trace)) { |
2f8f53af DG |
310 | continue; |
311 | } | |
312 | ||
123ed7c2 FD |
313 | /* |
314 | * Iterate over all the streams of the trace to see if we have a | |
315 | * metadata stream. | |
316 | */ | |
317 | cds_list_for_each_entry_rcu( | |
318 | stream, &ctf_trace->stream_list, stream_node) | |
319 | { | |
320 | if (stream->is_metadata) { | |
321 | trace_has_metadata_stream = true; | |
322 | break; | |
323 | } | |
324 | } | |
325 | ||
326 | /* | |
327 | * If there is no metadata stream in this trace at the moment | |
328 | * and we never sent one to the viewer, skip the trace. We | |
329 | * accept that the viewer will not see this trace at all. | |
330 | */ | |
331 | if (!trace_has_metadata_stream && | |
332 | !ctf_trace->metadata_stream_sent_to_viewer) { | |
3d7708ff JG |
333 | ctf_trace_put(ctf_trace); |
334 | continue; | |
123ed7c2 FD |
335 | } |
336 | ||
7591bab1 | 337 | cds_list_for_each_entry_rcu(stream, &ctf_trace->stream_list, stream_node) { |
2a174661 DG |
338 | struct relay_viewer_stream *vstream; |
339 | ||
7591bab1 | 340 | if (!stream_get(stream)) { |
2a174661 DG |
341 | continue; |
342 | } | |
7591bab1 | 343 | /* |
d812ecb9 | 344 | * stream published is protected by the session lock. |
7591bab1 MD |
345 | */ |
346 | if (!stream->published) { | |
347 | goto next; | |
348 | } | |
349 | vstream = viewer_stream_get_by_id(stream->stream_handle); | |
2f8f53af | 350 | if (!vstream) { |
123ed7c2 FD |
351 | /* |
352 | * Save that we sent the metadata stream to the | |
353 | * viewer. So that we know what trace the viewer | |
354 | * is aware of. | |
355 | */ | |
356 | if (stream->is_metadata) { | |
357 | ctf_trace->metadata_stream_sent_to_viewer = | |
358 | true; | |
359 | } | |
b66a15d1 JG |
360 | vstream = viewer_stream_create(stream, |
361 | viewer_trace_chunk, seek_t); | |
2a174661 DG |
362 | if (!vstream) { |
363 | ret = -1; | |
7591bab1 MD |
364 | ctf_trace_put(ctf_trace); |
365 | stream_put(stream); | |
2a174661 DG |
366 | goto error_unlock; |
367 | } | |
2a174661 DG |
368 | |
369 | if (nb_created) { | |
370 | /* Update number of created stream counter. */ | |
371 | (*nb_created)++; | |
372 | } | |
2229a09c MD |
373 | /* |
374 | * Ensure a self-reference is preserved even | |
375 | * after we have put our local reference. | |
376 | */ | |
862d3a3b MD |
377 | if (!viewer_stream_get(vstream)) { |
378 | ERR("Unable to get self-reference on viewer stream, logic error."); | |
379 | abort(); | |
380 | } | |
7591bab1 MD |
381 | } else { |
382 | if (!vstream->sent_flag && nb_unsent) { | |
383 | /* Update number of unsent stream counter. */ | |
384 | (*nb_unsent)++; | |
385 | } | |
2f8f53af | 386 | } |
2a174661 DG |
387 | /* Update number of total stream counter. */ |
388 | if (nb_total) { | |
2229a09c MD |
389 | if (stream->is_metadata) { |
390 | if (!stream->closed || | |
391 | stream->metadata_received > vstream->metadata_sent) { | |
392 | (*nb_total)++; | |
393 | } | |
394 | } else { | |
395 | if (!stream->closed || | |
a8f9f353 | 396 | !(((int64_t) (stream->prev_data_seq - stream->last_net_seq_num)) >= 0)) { |
2229a09c MD |
397 | |
398 | (*nb_total)++; | |
399 | } | |
400 | } | |
2f8f53af | 401 | } |
2229a09c MD |
402 | /* Put local reference. */ |
403 | viewer_stream_put(vstream); | |
7591bab1 MD |
404 | next: |
405 | stream_put(stream); | |
2f8f53af | 406 | } |
7591bab1 | 407 | ctf_trace_put(ctf_trace); |
2f8f53af DG |
408 | } |
409 | ||
410 | ret = 0; | |
411 | ||
412 | error_unlock: | |
2a174661 | 413 | rcu_read_unlock(); |
dbd6665b | 414 | error: |
2f8f53af DG |
415 | return ret; |
416 | } | |
417 | ||
b4aacfdc | 418 | int relayd_live_stop(void) |
d3e2ba59 | 419 | { |
b4aacfdc | 420 | /* Stop dispatch thread */ |
d3e2ba59 | 421 | CMM_STORE_SHARED(live_dispatch_thread_exit, 1); |
58eb9381 | 422 | futex_nto1_wake(&viewer_conn_queue.futex); |
b4aacfdc | 423 | return 0; |
d3e2ba59 JD |
424 | } |
425 | ||
d3e2ba59 JD |
426 | /* |
427 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
428 | */ | |
429 | static | |
23f940ff JG |
430 | int create_named_thread_poll_set(struct lttng_poll_event *events, |
431 | int size, const char *name) | |
d3e2ba59 JD |
432 | { |
433 | int ret; | |
434 | ||
435 | if (events == NULL || size == 0) { | |
436 | ret = -1; | |
437 | goto error; | |
438 | } | |
439 | ||
23f940ff JG |
440 | ret = fd_tracker_util_poll_create(the_fd_tracker, |
441 | name, events, 1, LTTNG_CLOEXEC); | |
d3e2ba59 JD |
442 | |
443 | /* Add quit pipe */ | |
bcf4a440 | 444 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
d3e2ba59 JD |
445 | if (ret < 0) { |
446 | goto error; | |
447 | } | |
448 | ||
449 | return 0; | |
450 | ||
451 | error: | |
452 | return ret; | |
453 | } | |
454 | ||
455 | /* | |
456 | * Check if the thread quit pipe was triggered. | |
457 | * | |
458 | * Return 1 if it was triggered else 0; | |
459 | */ | |
460 | static | |
bcf4a440 | 461 | int check_thread_quit_pipe(int fd, uint32_t events) |
d3e2ba59 | 462 | { |
bcf4a440 | 463 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { |
d3e2ba59 JD |
464 | return 1; |
465 | } | |
466 | ||
467 | return 0; | |
468 | } | |
469 | ||
8855795d JG |
470 | static |
471 | int create_sock(void *data, int *out_fd) | |
472 | { | |
473 | int ret; | |
474 | struct lttcomm_sock *sock = data; | |
475 | ||
476 | ret = lttcomm_create_sock(sock); | |
477 | if (ret < 0) { | |
478 | goto end; | |
479 | } | |
480 | ||
481 | *out_fd = sock->fd; | |
482 | end: | |
483 | return ret; | |
484 | } | |
485 | ||
486 | static | |
487 | int close_sock(void *data, int *in_fd) | |
488 | { | |
489 | struct lttcomm_sock *sock = data; | |
490 | ||
491 | return sock->ops->close(sock); | |
492 | } | |
493 | ||
29555a78 JG |
494 | static int accept_sock(void *data, int *out_fd) |
495 | { | |
496 | int ret = 0; | |
497 | /* Socks is an array of in_sock, out_sock. */ | |
498 | struct lttcomm_sock **socks = data; | |
499 | struct lttcomm_sock *in_sock = socks[0]; | |
500 | ||
501 | socks[1] = in_sock->ops->accept(in_sock); | |
502 | if (!socks[1]) { | |
503 | ret = -1; | |
504 | goto end; | |
505 | } | |
506 | *out_fd = socks[1]->fd; | |
507 | end: | |
508 | return ret; | |
509 | } | |
510 | ||
511 | static | |
512 | struct lttcomm_sock *accept_live_sock(struct lttcomm_sock *listening_sock, | |
513 | const char *name) | |
514 | { | |
515 | int out_fd, ret; | |
516 | struct lttcomm_sock *socks[2] = { listening_sock, NULL }; | |
517 | struct lttcomm_sock *new_sock = NULL; | |
518 | ||
519 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &out_fd, | |
520 | (const char **) &name, 1, accept_sock, &socks); | |
521 | if (ret) { | |
522 | goto end; | |
523 | } | |
524 | new_sock = socks[1]; | |
525 | DBG("%s accepted, socket %d", name, new_sock->fd); | |
526 | end: | |
527 | return new_sock; | |
528 | } | |
529 | ||
d3e2ba59 JD |
530 | /* |
531 | * Create and init socket from uri. | |
532 | */ | |
533 | static | |
8855795d | 534 | struct lttcomm_sock *init_socket(struct lttng_uri *uri, const char *name) |
d3e2ba59 | 535 | { |
8855795d | 536 | int ret, sock_fd; |
d3e2ba59 | 537 | struct lttcomm_sock *sock = NULL; |
8855795d JG |
538 | char uri_str[LTTNG_PATH_MAX]; |
539 | char *formated_name = NULL; | |
d3e2ba59 JD |
540 | |
541 | sock = lttcomm_alloc_sock_from_uri(uri); | |
542 | if (sock == NULL) { | |
543 | ERR("Allocating socket"); | |
544 | goto error; | |
545 | } | |
546 | ||
8855795d JG |
547 | /* |
548 | * Don't fail to create the socket if the name can't be built as it is | |
549 | * only used for debugging purposes. | |
550 | */ | |
551 | ret = uri_to_str_url(uri, uri_str, sizeof(uri_str)); | |
552 | uri_str[sizeof(uri_str) - 1] = '\0'; | |
553 | if (ret >= 0) { | |
554 | ret = asprintf(&formated_name, "%s socket @ %s", name, | |
555 | uri_str); | |
556 | if (ret < 0) { | |
557 | formated_name = NULL; | |
558 | } | |
d3e2ba59 | 559 | } |
8855795d JG |
560 | |
561 | ret = fd_tracker_open_unsuspendable_fd(the_fd_tracker, &sock_fd, | |
562 | (const char **) (formated_name ? &formated_name : NULL), | |
563 | 1, create_sock, sock); | |
564 | free(formated_name); | |
565 | DBG("Listening on %s socket %d", name, sock->fd); | |
d3e2ba59 JD |
566 | |
567 | ret = sock->ops->bind(sock); | |
568 | if (ret < 0) { | |
2288467f | 569 | PERROR("Failed to bind lttng-live socket"); |
d3e2ba59 JD |
570 | goto error; |
571 | } | |
572 | ||
573 | ret = sock->ops->listen(sock, -1); | |
574 | if (ret < 0) { | |
575 | goto error; | |
576 | ||
577 | } | |
578 | ||
579 | return sock; | |
580 | ||
581 | error: | |
582 | if (sock) { | |
583 | lttcomm_destroy_sock(sock); | |
584 | } | |
585 | return NULL; | |
586 | } | |
587 | ||
588 | /* | |
589 | * This thread manages the listening for new connections on the network | |
590 | */ | |
591 | static | |
592 | void *thread_listener(void *data) | |
593 | { | |
594 | int i, ret, pollfd, err = -1; | |
d3e2ba59 JD |
595 | uint32_t revents, nb_fd; |
596 | struct lttng_poll_event events; | |
597 | struct lttcomm_sock *live_control_sock; | |
598 | ||
599 | DBG("[thread] Relay live listener started"); | |
600 | ||
8fba2b8d | 601 | rcu_register_thread(); |
eea7556c MD |
602 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_LISTENER); |
603 | ||
604 | health_code_update(); | |
605 | ||
8855795d | 606 | live_control_sock = init_socket(live_uri, "Live listener"); |
d3e2ba59 JD |
607 | if (!live_control_sock) { |
608 | goto error_sock_control; | |
609 | } | |
610 | ||
fb4d42ab | 611 | /* Pass 2 as size here for the thread quit pipe and control sockets. */ |
23f940ff JG |
612 | ret = create_named_thread_poll_set(&events, 2, |
613 | "Live listener thread epoll"); | |
d3e2ba59 JD |
614 | if (ret < 0) { |
615 | goto error_create_poll; | |
616 | } | |
617 | ||
618 | /* Add the control socket */ | |
619 | ret = lttng_poll_add(&events, live_control_sock->fd, LPOLLIN | LPOLLRDHUP); | |
620 | if (ret < 0) { | |
621 | goto error_poll_add; | |
622 | } | |
623 | ||
3fd27398 MD |
624 | lttng_relay_notify_ready(); |
625 | ||
9b5e0863 MD |
626 | if (testpoint(relayd_thread_live_listener)) { |
627 | goto error_testpoint; | |
628 | } | |
629 | ||
d3e2ba59 | 630 | while (1) { |
eea7556c MD |
631 | health_code_update(); |
632 | ||
d3e2ba59 JD |
633 | DBG("Listener accepting live viewers connections"); |
634 | ||
635 | restart: | |
eea7556c | 636 | health_poll_entry(); |
d3e2ba59 | 637 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 638 | health_poll_exit(); |
d3e2ba59 JD |
639 | if (ret < 0) { |
640 | /* | |
641 | * Restart interrupted system call. | |
642 | */ | |
643 | if (errno == EINTR) { | |
644 | goto restart; | |
645 | } | |
646 | goto error; | |
647 | } | |
648 | nb_fd = ret; | |
649 | ||
650 | DBG("Relay new viewer connection received"); | |
651 | for (i = 0; i < nb_fd; i++) { | |
eea7556c MD |
652 | health_code_update(); |
653 | ||
d3e2ba59 JD |
654 | /* Fetch once the poll data */ |
655 | revents = LTTNG_POLL_GETEV(&events, i); | |
656 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
657 | ||
658 | /* Thread quit pipe has been closed. Killing thread. */ | |
bcf4a440 | 659 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
660 | if (ret) { |
661 | err = 0; | |
662 | goto exit; | |
663 | } | |
664 | ||
03e43155 | 665 | if (revents & LPOLLIN) { |
d3e2ba59 | 666 | /* |
7591bab1 MD |
667 | * A new connection is requested, therefore a |
668 | * viewer connection is allocated in this | |
669 | * thread, enqueued to a global queue and | |
670 | * dequeued (and freed) in the worker thread. | |
d3e2ba59 | 671 | */ |
58eb9381 DG |
672 | int val = 1; |
673 | struct relay_connection *new_conn; | |
d3e2ba59 JD |
674 | struct lttcomm_sock *newsock; |
675 | ||
29555a78 JG |
676 | newsock = accept_live_sock(live_control_sock, |
677 | "Live socket to client"); | |
d3e2ba59 JD |
678 | if (!newsock) { |
679 | PERROR("accepting control sock"); | |
d3e2ba59 JD |
680 | goto error; |
681 | } | |
682 | DBG("Relay viewer connection accepted socket %d", newsock->fd); | |
58eb9381 | 683 | |
d3e2ba59 | 684 | ret = setsockopt(newsock->fd, SOL_SOCKET, SO_REUSEADDR, &val, |
58eb9381 | 685 | sizeof(val)); |
d3e2ba59 JD |
686 | if (ret < 0) { |
687 | PERROR("setsockopt inet"); | |
688 | lttcomm_destroy_sock(newsock); | |
d3e2ba59 JD |
689 | goto error; |
690 | } | |
7591bab1 MD |
691 | new_conn = connection_create(newsock, RELAY_CONNECTION_UNKNOWN); |
692 | if (!new_conn) { | |
693 | lttcomm_destroy_sock(newsock); | |
694 | goto error; | |
695 | } | |
696 | /* Ownership assumed by the connection. */ | |
697 | newsock = NULL; | |
d3e2ba59 | 698 | |
58eb9381 | 699 | /* Enqueue request for the dispatcher thread. */ |
8bdee6e2 SM |
700 | cds_wfcq_enqueue(&viewer_conn_queue.head, &viewer_conn_queue.tail, |
701 | &new_conn->qnode); | |
d3e2ba59 JD |
702 | |
703 | /* | |
7591bab1 MD |
704 | * Wake the dispatch queue futex. |
705 | * Implicit memory barrier with the | |
706 | * exchange in cds_wfcq_enqueue. | |
d3e2ba59 | 707 | */ |
58eb9381 | 708 | futex_nto1_wake(&viewer_conn_queue.futex); |
03e43155 MD |
709 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
710 | ERR("socket poll error"); | |
711 | goto error; | |
712 | } else { | |
713 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
714 | goto error; | |
d3e2ba59 JD |
715 | } |
716 | } | |
717 | } | |
718 | ||
719 | exit: | |
720 | error: | |
721 | error_poll_add: | |
9b5e0863 | 722 | error_testpoint: |
23f940ff | 723 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 JD |
724 | error_create_poll: |
725 | if (live_control_sock->fd >= 0) { | |
8855795d JG |
726 | int sock_fd = live_control_sock->fd; |
727 | ||
728 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, | |
729 | &sock_fd, 1, close_sock, | |
730 | live_control_sock); | |
d3e2ba59 JD |
731 | if (ret) { |
732 | PERROR("close"); | |
733 | } | |
8855795d | 734 | live_control_sock->fd = -1; |
d3e2ba59 JD |
735 | } |
736 | lttcomm_destroy_sock(live_control_sock); | |
737 | error_sock_control: | |
738 | if (err) { | |
eea7556c | 739 | health_error(); |
d3e2ba59 JD |
740 | DBG("Live viewer listener thread exited with error"); |
741 | } | |
eea7556c | 742 | health_unregister(health_relayd); |
8fba2b8d | 743 | rcu_unregister_thread(); |
d3e2ba59 | 744 | DBG("Live viewer listener thread cleanup complete"); |
b4aacfdc MD |
745 | if (lttng_relay_stop_threads()) { |
746 | ERR("Error stopping threads"); | |
178a0557 | 747 | } |
d3e2ba59 JD |
748 | return NULL; |
749 | } | |
750 | ||
751 | /* | |
752 | * This thread manages the dispatching of the requests to worker threads | |
753 | */ | |
754 | static | |
755 | void *thread_dispatcher(void *data) | |
756 | { | |
6cd525e8 MD |
757 | int err = -1; |
758 | ssize_t ret; | |
8bdee6e2 | 759 | struct cds_wfcq_node *node; |
58eb9381 | 760 | struct relay_connection *conn = NULL; |
d3e2ba59 JD |
761 | |
762 | DBG("[thread] Live viewer relay dispatcher started"); | |
763 | ||
eea7556c MD |
764 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_DISPATCHER); |
765 | ||
9b5e0863 MD |
766 | if (testpoint(relayd_thread_live_dispatcher)) { |
767 | goto error_testpoint; | |
768 | } | |
769 | ||
eea7556c MD |
770 | health_code_update(); |
771 | ||
0ed3b1a8 | 772 | for (;;) { |
eea7556c MD |
773 | health_code_update(); |
774 | ||
d3e2ba59 | 775 | /* Atomically prepare the queue futex */ |
58eb9381 | 776 | futex_nto1_prepare(&viewer_conn_queue.futex); |
d3e2ba59 | 777 | |
0ed3b1a8 MD |
778 | if (CMM_LOAD_SHARED(live_dispatch_thread_exit)) { |
779 | break; | |
780 | } | |
781 | ||
d3e2ba59 | 782 | do { |
eea7556c MD |
783 | health_code_update(); |
784 | ||
d3e2ba59 | 785 | /* Dequeue commands */ |
8bdee6e2 SM |
786 | node = cds_wfcq_dequeue_blocking(&viewer_conn_queue.head, |
787 | &viewer_conn_queue.tail); | |
d3e2ba59 JD |
788 | if (node == NULL) { |
789 | DBG("Woken up but nothing in the live-viewer " | |
790 | "relay command queue"); | |
791 | /* Continue thread execution */ | |
792 | break; | |
793 | } | |
58eb9381 | 794 | conn = caa_container_of(node, struct relay_connection, qnode); |
d3e2ba59 | 795 | DBG("Dispatching viewer request waiting on sock %d", |
58eb9381 | 796 | conn->sock->fd); |
d3e2ba59 JD |
797 | |
798 | /* | |
7591bab1 MD |
799 | * Inform worker thread of the new request. This |
800 | * call is blocking so we can be assured that | |
801 | * the data will be read at some point in time | |
802 | * or wait to the end of the world :) | |
d3e2ba59 | 803 | */ |
58eb9381 DG |
804 | ret = lttng_write(live_conn_pipe[1], &conn, sizeof(conn)); |
805 | if (ret < 0) { | |
806 | PERROR("write conn pipe"); | |
7591bab1 | 807 | connection_put(conn); |
d3e2ba59 JD |
808 | goto error; |
809 | } | |
810 | } while (node != NULL); | |
811 | ||
812 | /* Futex wait on queue. Blocking call on futex() */ | |
eea7556c | 813 | health_poll_entry(); |
58eb9381 | 814 | futex_nto1_wait(&viewer_conn_queue.futex); |
eea7556c | 815 | health_poll_exit(); |
d3e2ba59 JD |
816 | } |
817 | ||
eea7556c MD |
818 | /* Normal exit, no error */ |
819 | err = 0; | |
820 | ||
d3e2ba59 | 821 | error: |
9b5e0863 | 822 | error_testpoint: |
eea7556c MD |
823 | if (err) { |
824 | health_error(); | |
825 | ERR("Health error occurred in %s", __func__); | |
826 | } | |
827 | health_unregister(health_relayd); | |
d3e2ba59 | 828 | DBG("Live viewer dispatch thread dying"); |
b4aacfdc MD |
829 | if (lttng_relay_stop_threads()) { |
830 | ERR("Error stopping threads"); | |
178a0557 | 831 | } |
d3e2ba59 JD |
832 | return NULL; |
833 | } | |
834 | ||
835 | /* | |
836 | * Establish connection with the viewer and check the versions. | |
837 | * | |
838 | * Return 0 on success or else negative value. | |
839 | */ | |
840 | static | |
58eb9381 | 841 | int viewer_connect(struct relay_connection *conn) |
d3e2ba59 JD |
842 | { |
843 | int ret; | |
844 | struct lttng_viewer_connect reply, msg; | |
845 | ||
58eb9381 | 846 | conn->version_check_done = 1; |
d3e2ba59 | 847 | |
eea7556c MD |
848 | health_code_update(); |
849 | ||
2f8f53af DG |
850 | DBG("Viewer is establishing a connection to the relayd."); |
851 | ||
58eb9381 | 852 | ret = recv_request(conn->sock, &msg, sizeof(msg)); |
2f8f53af | 853 | if (ret < 0) { |
d3e2ba59 JD |
854 | goto end; |
855 | } | |
856 | ||
eea7556c MD |
857 | health_code_update(); |
858 | ||
f46b2ce6 | 859 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 JD |
860 | reply.major = RELAYD_VERSION_COMM_MAJOR; |
861 | reply.minor = RELAYD_VERSION_COMM_MINOR; | |
862 | ||
863 | /* Major versions must be the same */ | |
864 | if (reply.major != be32toh(msg.major)) { | |
2f8f53af DG |
865 | DBG("Incompatible major versions ([relayd] %u vs [client] %u)", |
866 | reply.major, be32toh(msg.major)); | |
72180669 | 867 | ret = -1; |
d3e2ba59 JD |
868 | goto end; |
869 | } | |
870 | ||
58eb9381 | 871 | conn->major = reply.major; |
d3e2ba59 JD |
872 | /* We adapt to the lowest compatible version */ |
873 | if (reply.minor <= be32toh(msg.minor)) { | |
58eb9381 | 874 | conn->minor = reply.minor; |
d3e2ba59 | 875 | } else { |
58eb9381 | 876 | conn->minor = be32toh(msg.minor); |
d3e2ba59 JD |
877 | } |
878 | ||
c4e361a4 | 879 | if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_COMMAND) { |
58eb9381 | 880 | conn->type = RELAY_VIEWER_COMMAND; |
c4e361a4 | 881 | } else if (be32toh(msg.type) == LTTNG_VIEWER_CLIENT_NOTIFICATION) { |
58eb9381 | 882 | conn->type = RELAY_VIEWER_NOTIFICATION; |
d3e2ba59 JD |
883 | } else { |
884 | ERR("Unknown connection type : %u", be32toh(msg.type)); | |
885 | ret = -1; | |
886 | goto end; | |
887 | } | |
888 | ||
889 | reply.major = htobe32(reply.major); | |
890 | reply.minor = htobe32(reply.minor); | |
58eb9381 | 891 | if (conn->type == RELAY_VIEWER_COMMAND) { |
93b4787b | 892 | /* |
7591bab1 MD |
893 | * Increment outside of htobe64 macro, because the argument can |
894 | * be used more than once within the macro, and thus the | |
895 | * operation may be undefined. | |
93b4787b | 896 | */ |
7591bab1 | 897 | pthread_mutex_lock(&last_relay_viewer_session_id_lock); |
93b4787b | 898 | last_relay_viewer_session_id++; |
7591bab1 | 899 | pthread_mutex_unlock(&last_relay_viewer_session_id_lock); |
93b4787b | 900 | reply.viewer_session_id = htobe64(last_relay_viewer_session_id); |
d3e2ba59 | 901 | } |
eea7556c MD |
902 | |
903 | health_code_update(); | |
904 | ||
58eb9381 | 905 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 906 | if (ret < 0) { |
2f8f53af | 907 | goto end; |
d3e2ba59 JD |
908 | } |
909 | ||
eea7556c MD |
910 | health_code_update(); |
911 | ||
58eb9381 | 912 | DBG("Version check done using protocol %u.%u", conn->major, conn->minor); |
d3e2ba59 JD |
913 | ret = 0; |
914 | ||
915 | end: | |
916 | return ret; | |
917 | } | |
918 | ||
919 | /* | |
920 | * Send the viewer the list of current sessions. | |
7591bab1 MD |
921 | * We need to create a copy of the hash table content because otherwise |
922 | * we cannot assume the number of entries stays the same between getting | |
923 | * the number of HT elements and iteration over the HT. | |
d3e2ba59 JD |
924 | * |
925 | * Return 0 on success or else a negative value. | |
926 | */ | |
927 | static | |
58eb9381 | 928 | int viewer_list_sessions(struct relay_connection *conn) |
d3e2ba59 | 929 | { |
5f10c6b1 | 930 | int ret = 0; |
d3e2ba59 | 931 | struct lttng_viewer_list_sessions session_list; |
d3e2ba59 | 932 | struct lttng_ht_iter iter; |
d3e2ba59 | 933 | struct relay_session *session; |
7591bab1 MD |
934 | struct lttng_viewer_session *send_session_buf = NULL; |
935 | uint32_t buf_count = SESSION_BUF_DEFAULT_COUNT; | |
936 | uint32_t count = 0; | |
d3e2ba59 JD |
937 | |
938 | DBG("List sessions received"); | |
939 | ||
7591bab1 MD |
940 | send_session_buf = zmalloc(SESSION_BUF_DEFAULT_COUNT * sizeof(*send_session_buf)); |
941 | if (!send_session_buf) { | |
942 | return -1; | |
d3e2ba59 JD |
943 | } |
944 | ||
7591bab1 MD |
945 | rcu_read_lock(); |
946 | cds_lfht_for_each_entry(sessions_ht->ht, &iter.iter, session, | |
2f8f53af | 947 | session_n.node) { |
7591bab1 | 948 | struct lttng_viewer_session *send_session; |
d3e2ba59 | 949 | |
eea7556c MD |
950 | health_code_update(); |
951 | ||
d995f382 | 952 | pthread_mutex_lock(&session->lock); |
7e0a4379 JR |
953 | if (session->connection_closed) { |
954 | /* Skip closed session */ | |
d995f382 JG |
955 | goto next_session; |
956 | } | |
957 | if (!session->current_trace_chunk) { | |
958 | /* | |
959 | * Skip un-attachable session. It is either | |
960 | * being destroyed or has not had a trace | |
961 | * chunk created against it yet. | |
962 | */ | |
963 | goto next_session; | |
7e0a4379 JR |
964 | } |
965 | ||
7591bab1 MD |
966 | if (count >= buf_count) { |
967 | struct lttng_viewer_session *newbuf; | |
968 | uint32_t new_buf_count = buf_count << 1; | |
eea7556c | 969 | |
7591bab1 MD |
970 | newbuf = realloc(send_session_buf, |
971 | new_buf_count * sizeof(*send_session_buf)); | |
972 | if (!newbuf) { | |
973 | ret = -1; | |
d995f382 | 974 | goto break_loop; |
7591bab1 MD |
975 | } |
976 | send_session_buf = newbuf; | |
977 | buf_count = new_buf_count; | |
6763619c | 978 | } |
7591bab1 | 979 | send_session = &send_session_buf[count]; |
bfc3fb17 MD |
980 | if (lttng_strncpy(send_session->session_name, |
981 | session->session_name, | |
982 | sizeof(send_session->session_name))) { | |
983 | ret = -1; | |
d995f382 | 984 | goto break_loop; |
bfc3fb17 MD |
985 | } |
986 | if (lttng_strncpy(send_session->hostname, session->hostname, | |
987 | sizeof(send_session->hostname))) { | |
988 | ret = -1; | |
d995f382 | 989 | goto break_loop; |
bfc3fb17 | 990 | } |
7591bab1 MD |
991 | send_session->id = htobe64(session->id); |
992 | send_session->live_timer = htobe32(session->live_timer); | |
993 | if (session->viewer_attached) { | |
994 | send_session->clients = htobe32(1); | |
995 | } else { | |
996 | send_session->clients = htobe32(0); | |
d227d5bd | 997 | } |
7591bab1 MD |
998 | send_session->streams = htobe32(session->stream_count); |
999 | count++; | |
d995f382 JG |
1000 | next_session: |
1001 | pthread_mutex_unlock(&session->lock); | |
1002 | continue; | |
1003 | break_loop: | |
1004 | pthread_mutex_unlock(&session->lock); | |
1005 | break; | |
7591bab1 MD |
1006 | } |
1007 | rcu_read_unlock(); | |
5f10c6b1 JG |
1008 | if (ret < 0) { |
1009 | goto end_free; | |
1010 | } | |
d227d5bd | 1011 | |
7591bab1 | 1012 | session_list.sessions_count = htobe32(count); |
d227d5bd | 1013 | |
7591bab1 | 1014 | health_code_update(); |
d227d5bd | 1015 | |
7591bab1 MD |
1016 | ret = send_response(conn->sock, &session_list, sizeof(session_list)); |
1017 | if (ret < 0) { | |
1018 | goto end_free; | |
d227d5bd | 1019 | } |
d227d5bd | 1020 | |
7591bab1 | 1021 | health_code_update(); |
d227d5bd | 1022 | |
7591bab1 MD |
1023 | ret = send_response(conn->sock, send_session_buf, |
1024 | count * sizeof(*send_session_buf)); | |
1025 | if (ret < 0) { | |
1026 | goto end_free; | |
d227d5bd | 1027 | } |
7591bab1 | 1028 | health_code_update(); |
d227d5bd | 1029 | |
7591bab1 MD |
1030 | ret = 0; |
1031 | end_free: | |
1032 | free(send_session_buf); | |
1033 | return ret; | |
d227d5bd JD |
1034 | } |
1035 | ||
80e8027a | 1036 | /* |
7591bab1 | 1037 | * Send the viewer the list of current streams. |
80e8027a JD |
1038 | */ |
1039 | static | |
58eb9381 | 1040 | int viewer_get_new_streams(struct relay_connection *conn) |
80e8027a JD |
1041 | { |
1042 | int ret, send_streams = 0; | |
7591bab1 | 1043 | uint32_t nb_created = 0, nb_unsent = 0, nb_streams = 0, nb_total = 0; |
80e8027a JD |
1044 | struct lttng_viewer_new_streams_request request; |
1045 | struct lttng_viewer_new_streams_response response; | |
b66a15d1 | 1046 | struct relay_session *session = NULL; |
6763619c | 1047 | uint64_t session_id; |
bddf80e4 | 1048 | bool closed = false; |
80e8027a | 1049 | |
58eb9381 | 1050 | assert(conn); |
80e8027a JD |
1051 | |
1052 | DBG("Get new streams received"); | |
1053 | ||
80e8027a JD |
1054 | health_code_update(); |
1055 | ||
2f8f53af | 1056 | /* Receive the request from the connected client. */ |
58eb9381 | 1057 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1058 | if (ret < 0) { |
80e8027a JD |
1059 | goto error; |
1060 | } | |
6763619c | 1061 | session_id = be64toh(request.session_id); |
80e8027a JD |
1062 | |
1063 | health_code_update(); | |
1064 | ||
53efb85a MD |
1065 | memset(&response, 0, sizeof(response)); |
1066 | ||
7591bab1 | 1067 | session = session_get_by_id(session_id); |
2f8f53af | 1068 | if (!session) { |
6763619c | 1069 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1070 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1071 | goto send_reply; |
1072 | } | |
1073 | ||
7591bab1 | 1074 | if (!viewer_session_is_attached(conn->viewer_session, session)) { |
c4e361a4 | 1075 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_ERR); |
80e8027a JD |
1076 | goto send_reply; |
1077 | } | |
1078 | ||
c06fdd95 | 1079 | pthread_mutex_lock(&session->lock); |
b66a15d1 JG |
1080 | ret = make_viewer_streams(session, |
1081 | conn->viewer_session->current_trace_chunk, | |
1082 | LTTNG_VIEWER_SEEK_LAST, &nb_total, &nb_unsent, | |
bddf80e4 | 1083 | &nb_created, &closed); |
2f8f53af | 1084 | if (ret < 0) { |
b66a15d1 | 1085 | goto error_unlock_session; |
2f8f53af | 1086 | } |
3d0bbd40 JG |
1087 | send_streams = 1; |
1088 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_OK); | |
b66a15d1 | 1089 | |
2f8f53af DG |
1090 | /* Only send back the newly created streams with the unsent ones. */ |
1091 | nb_streams = nb_created + nb_unsent; | |
80e8027a JD |
1092 | response.streams_count = htobe32(nb_streams); |
1093 | ||
4479f682 | 1094 | /* |
2229a09c MD |
1095 | * If the session is closed, HUP when there are no more streams |
1096 | * with data. | |
4479f682 | 1097 | */ |
bddf80e4 | 1098 | if (closed && nb_total == 0) { |
4479f682 | 1099 | send_streams = 0; |
bddf80e4 | 1100 | response.streams_count = 0; |
4479f682 | 1101 | response.status = htobe32(LTTNG_VIEWER_NEW_STREAMS_HUP); |
3d0bbd40 | 1102 | goto send_reply_unlock; |
4479f682 | 1103 | } |
3d0bbd40 JG |
1104 | send_reply_unlock: |
1105 | pthread_mutex_unlock(&session->lock); | |
4479f682 | 1106 | |
80e8027a JD |
1107 | send_reply: |
1108 | health_code_update(); | |
58eb9381 | 1109 | ret = send_response(conn->sock, &response, sizeof(response)); |
80e8027a | 1110 | if (ret < 0) { |
7591bab1 | 1111 | goto end_put_session; |
80e8027a JD |
1112 | } |
1113 | health_code_update(); | |
1114 | ||
1115 | /* | |
7591bab1 MD |
1116 | * Unknown or empty session, just return gracefully, the viewer |
1117 | * knows what is happening. | |
80e8027a JD |
1118 | */ |
1119 | if (!send_streams || !nb_streams) { | |
1120 | ret = 0; | |
7591bab1 | 1121 | goto end_put_session; |
80e8027a JD |
1122 | } |
1123 | ||
2f8f53af | 1124 | /* |
7591bab1 MD |
1125 | * Send stream and *DON'T* ignore the sent flag so every viewer |
1126 | * streams that were not sent from that point will be sent to | |
1127 | * the viewer. | |
2f8f53af | 1128 | */ |
c06fdd95 | 1129 | ret = send_viewer_streams(conn->sock, session_id, 0); |
2f8f53af | 1130 | if (ret < 0) { |
7591bab1 | 1131 | goto end_put_session; |
80e8027a JD |
1132 | } |
1133 | ||
7591bab1 MD |
1134 | end_put_session: |
1135 | if (session) { | |
1136 | session_put(session); | |
1137 | } | |
80e8027a JD |
1138 | error: |
1139 | return ret; | |
b66a15d1 JG |
1140 | error_unlock_session: |
1141 | pthread_mutex_unlock(&session->lock); | |
1142 | session_put(session); | |
1143 | return ret; | |
80e8027a JD |
1144 | } |
1145 | ||
d3e2ba59 JD |
1146 | /* |
1147 | * Send the viewer the list of current sessions. | |
1148 | */ | |
1149 | static | |
58eb9381 | 1150 | int viewer_attach_session(struct relay_connection *conn) |
d3e2ba59 | 1151 | { |
2f8f53af DG |
1152 | int send_streams = 0; |
1153 | ssize_t ret; | |
80e8027a | 1154 | uint32_t nb_streams = 0; |
2f8f53af | 1155 | enum lttng_viewer_seek seek_type; |
d3e2ba59 JD |
1156 | struct lttng_viewer_attach_session_request request; |
1157 | struct lttng_viewer_attach_session_response response; | |
7591bab1 | 1158 | struct relay_session *session = NULL; |
dbd6665b | 1159 | enum lttng_viewer_attach_return_code viewer_attach_status; |
bddf80e4 | 1160 | bool closed = false; |
c06fdd95 | 1161 | uint64_t session_id; |
d3e2ba59 | 1162 | |
58eb9381 | 1163 | assert(conn); |
d3e2ba59 | 1164 | |
eea7556c MD |
1165 | health_code_update(); |
1166 | ||
2f8f53af | 1167 | /* Receive the request from the connected client. */ |
58eb9381 | 1168 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1169 | if (ret < 0) { |
d3e2ba59 JD |
1170 | goto error; |
1171 | } | |
1172 | ||
c06fdd95 | 1173 | session_id = be64toh(request.session_id); |
eea7556c MD |
1174 | health_code_update(); |
1175 | ||
53efb85a MD |
1176 | memset(&response, 0, sizeof(response)); |
1177 | ||
c3b7390b JD |
1178 | if (!conn->viewer_session) { |
1179 | DBG("Client trying to attach before creating a live viewer session"); | |
1180 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NO_SESSION); | |
1181 | goto send_reply; | |
1182 | } | |
1183 | ||
c06fdd95 | 1184 | session = session_get_by_id(session_id); |
2f8f53af | 1185 | if (!session) { |
c06fdd95 | 1186 | DBG("Relay session %" PRIu64 " not found", session_id); |
c4e361a4 | 1187 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
d3e2ba59 JD |
1188 | goto send_reply; |
1189 | } | |
c06fdd95 | 1190 | DBG("Attach session ID %" PRIu64 " received", session_id); |
d3e2ba59 | 1191 | |
c06fdd95 | 1192 | pthread_mutex_lock(&session->lock); |
79a42980 JG |
1193 | if (!session->current_trace_chunk) { |
1194 | /* | |
1195 | * Session is either being destroyed or it never had a trace | |
1196 | * chunk created against it. | |
1197 | */ | |
1198 | DBG("Session requested by live client has no current trace chunk, returning unknown session"); | |
1199 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); | |
1200 | goto send_reply; | |
1201 | } | |
7591bab1 | 1202 | if (session->live_timer == 0) { |
d3e2ba59 | 1203 | DBG("Not live session"); |
c4e361a4 | 1204 | response.status = htobe32(LTTNG_VIEWER_ATTACH_NOT_LIVE); |
d3e2ba59 | 1205 | goto send_reply; |
7591bab1 MD |
1206 | } |
1207 | ||
1208 | send_streams = 1; | |
dbd6665b JG |
1209 | viewer_attach_status = viewer_session_attach(conn->viewer_session, |
1210 | session); | |
1211 | if (viewer_attach_status != LTTNG_VIEWER_ATTACH_OK) { | |
1212 | response.status = htobe32(viewer_attach_status); | |
7591bab1 | 1213 | goto send_reply; |
d3e2ba59 JD |
1214 | } |
1215 | ||
1216 | switch (be32toh(request.seek)) { | |
c4e361a4 JD |
1217 | case LTTNG_VIEWER_SEEK_BEGINNING: |
1218 | case LTTNG_VIEWER_SEEK_LAST: | |
7591bab1 | 1219 | response.status = htobe32(LTTNG_VIEWER_ATTACH_OK); |
2f8f53af | 1220 | seek_type = be32toh(request.seek); |
d3e2ba59 JD |
1221 | break; |
1222 | default: | |
1223 | ERR("Wrong seek parameter"); | |
c4e361a4 | 1224 | response.status = htobe32(LTTNG_VIEWER_ATTACH_SEEK_ERR); |
d3e2ba59 JD |
1225 | send_streams = 0; |
1226 | goto send_reply; | |
1227 | } | |
1228 | ||
b66a15d1 JG |
1229 | ret = make_viewer_streams(session, |
1230 | conn->viewer_session->current_trace_chunk, seek_type, | |
1231 | &nb_streams, NULL, NULL, &closed); | |
2f8f53af | 1232 | if (ret < 0) { |
7591bab1 | 1233 | goto end_put_session; |
d3e2ba59 | 1234 | } |
c06fdd95 JG |
1235 | pthread_mutex_unlock(&session->lock); |
1236 | session_put(session); | |
1237 | session = NULL; | |
1238 | ||
1239 | response.streams_count = htobe32(nb_streams); | |
bddf80e4 MD |
1240 | /* |
1241 | * If the session is closed when the viewer is attaching, it | |
1242 | * means some of the streams may have been concurrently removed, | |
1243 | * so we don't allow the viewer to attach, even if there are | |
1244 | * streams available. | |
1245 | */ | |
1246 | if (closed) { | |
1247 | send_streams = 0; | |
1248 | response.streams_count = 0; | |
06079f15 | 1249 | response.status = htobe32(LTTNG_VIEWER_ATTACH_UNK); |
bddf80e4 MD |
1250 | goto send_reply; |
1251 | } | |
1252 | ||
d3e2ba59 | 1253 | send_reply: |
eea7556c | 1254 | health_code_update(); |
58eb9381 | 1255 | ret = send_response(conn->sock, &response, sizeof(response)); |
d3e2ba59 | 1256 | if (ret < 0) { |
7591bab1 | 1257 | goto end_put_session; |
d3e2ba59 | 1258 | } |
eea7556c | 1259 | health_code_update(); |
d3e2ba59 JD |
1260 | |
1261 | /* | |
7591bab1 MD |
1262 | * Unknown or empty session, just return gracefully, the viewer |
1263 | * knows what is happening. | |
d3e2ba59 | 1264 | */ |
157df586 | 1265 | if (!send_streams || !nb_streams) { |
d3e2ba59 | 1266 | ret = 0; |
7591bab1 | 1267 | goto end_put_session; |
d3e2ba59 JD |
1268 | } |
1269 | ||
2f8f53af | 1270 | /* Send stream and ignore the sent flag. */ |
c06fdd95 | 1271 | ret = send_viewer_streams(conn->sock, session_id, 1); |
2f8f53af | 1272 | if (ret < 0) { |
7591bab1 | 1273 | goto end_put_session; |
d3e2ba59 | 1274 | } |
d3e2ba59 | 1275 | |
7591bab1 MD |
1276 | end_put_session: |
1277 | if (session) { | |
c06fdd95 | 1278 | pthread_mutex_unlock(&session->lock); |
7591bab1 MD |
1279 | session_put(session); |
1280 | } | |
4a9daf17 JD |
1281 | error: |
1282 | return ret; | |
1283 | } | |
1284 | ||
878c34cf DG |
1285 | /* |
1286 | * Open the index file if needed for the given vstream. | |
1287 | * | |
f8f3885c MD |
1288 | * If an index file is successfully opened, the vstream will set it as its |
1289 | * current index file. | |
878c34cf DG |
1290 | * |
1291 | * Return 0 on success, a negative value on error (-ENOENT if not ready yet). | |
7591bab1 MD |
1292 | * |
1293 | * Called with rstream lock held. | |
878c34cf DG |
1294 | */ |
1295 | static int try_open_index(struct relay_viewer_stream *vstream, | |
1296 | struct relay_stream *rstream) | |
1297 | { | |
1298 | int ret = 0; | |
ebb29c10 JG |
1299 | const uint32_t connection_major = rstream->trace->session->major; |
1300 | const uint32_t connection_minor = rstream->trace->session->minor; | |
3ff5c5db | 1301 | enum lttng_trace_chunk_status chunk_status; |
878c34cf | 1302 | |
f8f3885c | 1303 | if (vstream->index_file) { |
878c34cf DG |
1304 | goto end; |
1305 | } | |
1306 | ||
1307 | /* | |
7591bab1 | 1308 | * First time, we open the index file and at least one index is ready. |
878c34cf | 1309 | */ |
a44ca2ca | 1310 | if (rstream->index_received_seqcount == 0) { |
878c34cf DG |
1311 | ret = -ENOENT; |
1312 | goto end; | |
1313 | } | |
3ff5c5db | 1314 | chunk_status = lttng_index_file_create_from_trace_chunk_read_only( |
b66a15d1 | 1315 | vstream->stream_file.trace_chunk, rstream->path_name, |
ebb29c10 JG |
1316 | rstream->channel_name, rstream->tracefile_size, |
1317 | vstream->current_tracefile_id, | |
1318 | lttng_to_index_major(connection_major, connection_minor), | |
3ff5c5db MD |
1319 | lttng_to_index_minor(connection_major, connection_minor), |
1320 | true, &vstream->index_file); | |
1321 | if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1322 | if (chunk_status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { | |
1323 | ret = -ENOENT; | |
1324 | } else { | |
1325 | ret = -1; | |
1326 | } | |
878c34cf DG |
1327 | } |
1328 | ||
1329 | end: | |
1330 | return ret; | |
1331 | } | |
1332 | ||
1333 | /* | |
7591bab1 MD |
1334 | * Check the status of the index for the given stream. This function |
1335 | * updates the index structure if needed and can put (close) the vstream | |
1336 | * in the HUP situation. | |
1337 | * | |
1338 | * Return 0 means that we can proceed with the index. A value of 1 means | |
1339 | * that the index has been updated and is ready to be sent to the | |
1340 | * client. A negative value indicates an error that can't be handled. | |
878c34cf | 1341 | * |
7591bab1 | 1342 | * Called with rstream lock held. |
878c34cf DG |
1343 | */ |
1344 | static int check_index_status(struct relay_viewer_stream *vstream, | |
1345 | struct relay_stream *rstream, struct ctf_trace *trace, | |
1346 | struct lttng_viewer_index *index) | |
1347 | { | |
1348 | int ret; | |
1349 | ||
68c40154 MD |
1350 | DBG("Check index status: index_received_seqcount %" PRIu64 " " |
1351 | "index_sent_seqcount %" PRIu64 " " | |
1352 | "for stream %" PRIu64, | |
1353 | rstream->index_received_seqcount, | |
1354 | vstream->index_sent_seqcount, | |
1355 | vstream->stream->stream_handle); | |
797bc362 | 1356 | if ((trace->session->connection_closed || rstream->closed) |
a44ca2ca MD |
1357 | && rstream->index_received_seqcount |
1358 | == vstream->index_sent_seqcount) { | |
797bc362 MD |
1359 | /* |
1360 | * Last index sent and session connection or relay | |
1361 | * stream are closed. | |
1362 | */ | |
7591bab1 MD |
1363 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
1364 | goto hup; | |
1365 | } else if (rstream->beacon_ts_end != -1ULL && | |
b0d240a2 MD |
1366 | (rstream->index_received_seqcount == 0 || |
1367 | (vstream->index_sent_seqcount != 0 && | |
a44ca2ca | 1368 | rstream->index_received_seqcount |
b0d240a2 | 1369 | <= vstream->index_sent_seqcount))) { |
7591bab1 MD |
1370 | /* |
1371 | * We've received a synchronization beacon and the last index | |
1372 | * available has been sent, the index for now is inactive. | |
1373 | * | |
1374 | * In this case, we have received a beacon which allows us to | |
1375 | * inform the client of a time interval during which we can | |
1376 | * guarantee that there are no events to read (and never will | |
1377 | * be). | |
b0d240a2 MD |
1378 | * |
1379 | * The sent seqcount can grow higher than receive seqcount on | |
1380 | * clear because the rotation performed by clear will push | |
1381 | * the index_sent_seqcount ahead (see | |
1382 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1383 | * packet sequence numbers. | |
7591bab1 MD |
1384 | */ |
1385 | index->status = htobe32(LTTNG_VIEWER_INDEX_INACTIVE); | |
1386 | index->timestamp_end = htobe64(rstream->beacon_ts_end); | |
1387 | index->stream_id = htobe64(rstream->ctf_stream_id); | |
68c40154 MD |
1388 | DBG("Check index status: inactive with beacon, for stream %" PRIu64, |
1389 | vstream->stream->stream_handle); | |
7591bab1 | 1390 | goto index_ready; |
b0d240a2 MD |
1391 | } else if (rstream->index_received_seqcount == 0 || |
1392 | (vstream->index_sent_seqcount != 0 && | |
1393 | rstream->index_received_seqcount | |
1394 | <= vstream->index_sent_seqcount)) { | |
7591bab1 | 1395 | /* |
b0d240a2 | 1396 | * This checks whether received <= sent seqcount. In |
a44ca2ca MD |
1397 | * this case, we have not received a beacon. Therefore, |
1398 | * we can only ask the client to retry later. | |
b0d240a2 MD |
1399 | * |
1400 | * The sent seqcount can grow higher than receive seqcount on | |
1401 | * clear because the rotation performed by clear will push | |
1402 | * the index_sent_seqcount ahead (see | |
1403 | * viewer_stream_sync_tracefile_array_tail) and skip over | |
1404 | * packet sequence numbers. | |
7591bab1 MD |
1405 | */ |
1406 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
68c40154 MD |
1407 | DBG("Check index status: retry for stream %" PRIu64, |
1408 | vstream->stream->stream_handle); | |
7591bab1 | 1409 | goto index_ready; |
a44ca2ca MD |
1410 | } else if (!tracefile_array_seq_in_file(rstream->tfa, |
1411 | vstream->current_tracefile_id, | |
1412 | vstream->index_sent_seqcount)) { | |
7591bab1 | 1413 | /* |
a44ca2ca MD |
1414 | * The next index we want to send cannot be read either |
1415 | * because we need to perform a rotation, or due to | |
1416 | * the producer having overwritten its trace file. | |
7591bab1 | 1417 | */ |
a44ca2ca | 1418 | DBG("Viewer stream %" PRIu64 " rotation", |
7591bab1 MD |
1419 | vstream->stream->stream_handle); |
1420 | ret = viewer_stream_rotate(vstream); | |
b0d240a2 | 1421 | if (ret == 1) { |
7591bab1 MD |
1422 | /* EOF across entire stream. */ |
1423 | index->status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1424 | goto hup; | |
1425 | } | |
7591bab1 | 1426 | /* |
a44ca2ca MD |
1427 | * If we have been pushed due to overwrite, it |
1428 | * necessarily means there is data that can be read in | |
1429 | * the stream. If we rotated because we reached the end | |
1430 | * of a tracefile, it means the following tracefile | |
1431 | * needs to contain at least one index, else we would | |
1432 | * have already returned LTTNG_VIEWER_INDEX_RETRY to the | |
1433 | * viewer. The updated index_sent_seqcount needs to | |
1434 | * point to a readable index entry now. | |
1435 | * | |
1436 | * In the case where we "rotate" on a single file, we | |
1437 | * can end up in a case where the requested index is | |
1438 | * still unavailable. | |
7591bab1 | 1439 | */ |
a44ca2ca MD |
1440 | if (rstream->tracefile_count == 1 && |
1441 | !tracefile_array_seq_in_file( | |
1442 | rstream->tfa, | |
1443 | vstream->current_tracefile_id, | |
1444 | vstream->index_sent_seqcount)) { | |
1445 | index->status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
68c40154 MD |
1446 | DBG("Check index status: retry: " |
1447 | "tracefile array sequence number %" PRIu64 | |
1448 | " not in file for stream %" PRIu64, | |
1449 | vstream->index_sent_seqcount, | |
1450 | vstream->stream->stream_handle); | |
a44ca2ca | 1451 | goto index_ready; |
878c34cf | 1452 | } |
a44ca2ca MD |
1453 | assert(tracefile_array_seq_in_file(rstream->tfa, |
1454 | vstream->current_tracefile_id, | |
1455 | vstream->index_sent_seqcount)); | |
878c34cf | 1456 | } |
a44ca2ca MD |
1457 | /* ret == 0 means successful so we continue. */ |
1458 | ret = 0; | |
878c34cf DG |
1459 | return ret; |
1460 | ||
1461 | hup: | |
7591bab1 | 1462 | viewer_stream_put(vstream); |
878c34cf DG |
1463 | index_ready: |
1464 | return 1; | |
1465 | } | |
1466 | ||
d3e2ba59 JD |
1467 | /* |
1468 | * Send the next index for a stream. | |
1469 | * | |
1470 | * Return 0 on success or else a negative value. | |
1471 | */ | |
1472 | static | |
58eb9381 | 1473 | int viewer_get_next_index(struct relay_connection *conn) |
d3e2ba59 JD |
1474 | { |
1475 | int ret; | |
1476 | struct lttng_viewer_get_next_index request_index; | |
1477 | struct lttng_viewer_index viewer_index; | |
50adc264 | 1478 | struct ctf_packet_index packet_index; |
7591bab1 MD |
1479 | struct relay_viewer_stream *vstream = NULL; |
1480 | struct relay_stream *rstream = NULL; | |
1481 | struct ctf_trace *ctf_trace = NULL; | |
1482 | struct relay_viewer_stream *metadata_viewer_stream = NULL; | |
d3e2ba59 | 1483 | |
58eb9381 | 1484 | assert(conn); |
d3e2ba59 JD |
1485 | |
1486 | DBG("Viewer get next index"); | |
1487 | ||
7591bab1 | 1488 | memset(&viewer_index, 0, sizeof(viewer_index)); |
eea7556c | 1489 | health_code_update(); |
2f8f53af | 1490 | |
58eb9381 | 1491 | ret = recv_request(conn->sock, &request_index, sizeof(request_index)); |
2f8f53af | 1492 | if (ret < 0) { |
d3e2ba59 JD |
1493 | goto end; |
1494 | } | |
eea7556c | 1495 | health_code_update(); |
d3e2ba59 | 1496 | |
7591bab1 | 1497 | vstream = viewer_stream_get_by_id(be64toh(request_index.stream_id)); |
6763619c | 1498 | if (!vstream) { |
a44ca2ca | 1499 | DBG("Client requested index of unknown stream id %" PRIu64, |
9b9f9f94 | 1500 | (uint64_t) be64toh(request_index.stream_id)); |
f1883937 MD |
1501 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1502 | goto send_reply; | |
2a174661 DG |
1503 | } |
1504 | ||
7591bab1 MD |
1505 | /* Use back. ref. Protected by refcounts. */ |
1506 | rstream = vstream->stream; | |
1507 | ctf_trace = rstream->trace; | |
d3e2ba59 | 1508 | |
7591bab1 MD |
1509 | /* metadata_viewer_stream may be NULL. */ |
1510 | metadata_viewer_stream = | |
1511 | ctf_trace_get_viewer_metadata_stream(ctf_trace); | |
2a174661 | 1512 | |
7591bab1 | 1513 | pthread_mutex_lock(&rstream->lock); |
d3e2ba59 JD |
1514 | |
1515 | /* | |
1516 | * The viewer should not ask for index on metadata stream. | |
1517 | */ | |
7591bab1 | 1518 | if (rstream->is_metadata) { |
c4e361a4 | 1519 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); |
d3e2ba59 JD |
1520 | goto send_reply; |
1521 | } | |
1522 | ||
b0d240a2 MD |
1523 | if (rstream->ongoing_rotation.is_set) { |
1524 | /* Rotation is ongoing, try again later. */ | |
1525 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1526 | goto send_reply; | |
1527 | } | |
1528 | ||
1529 | if (rstream->trace->session->ongoing_rotation) { | |
1530 | /* Rotation is ongoing, try again later. */ | |
1531 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1532 | goto send_reply; | |
1533 | } | |
1534 | ||
1535 | if (rstream->trace_chunk) { | |
1536 | uint64_t rchunk_id, vchunk_id; | |
1537 | ||
1538 | /* | |
1539 | * If the relay stream is not yet closed, ensure the viewer | |
1540 | * chunk matches the relay chunk after clear. | |
1541 | */ | |
1542 | if (lttng_trace_chunk_get_id(rstream->trace_chunk, | |
1543 | &rchunk_id) != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
c4e361a4 | 1544 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
b0d240a2 MD |
1545 | goto send_reply; |
1546 | } | |
1547 | if (lttng_trace_chunk_get_id( | |
1548 | conn->viewer_session->current_trace_chunk, | |
1549 | &vchunk_id) != LTTNG_TRACE_CHUNK_STATUS_OK) { | |
1550 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1551 | goto send_reply; | |
1552 | } | |
1553 | ||
1554 | if (rchunk_id != vchunk_id) { | |
1555 | DBG("Relay and viewer chunk ids differ: " | |
1556 | "rchunk_id %" PRIu64 " vchunk_id %" PRIu64, | |
1557 | rchunk_id, vchunk_id); | |
1558 | ||
1559 | lttng_trace_chunk_put( | |
1560 | conn->viewer_session->current_trace_chunk); | |
1561 | conn->viewer_session->current_trace_chunk = NULL; | |
1562 | ret = viewer_session_set_trace_chunk_copy( | |
1563 | conn->viewer_session, | |
1564 | rstream->trace_chunk); | |
1565 | if (ret) { | |
1566 | viewer_index.status = | |
1567 | htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1568 | goto send_reply; | |
1569 | } | |
d3e2ba59 | 1570 | } |
b0d240a2 MD |
1571 | } |
1572 | if (conn->viewer_session->current_trace_chunk != | |
1573 | vstream->stream_file.trace_chunk) { | |
1574 | bool acquired_reference; | |
1575 | ||
1576 | DBG("Viewer session and viewer stream chunk differ: " | |
1577 | "vsession chunk %p vstream chunk %p", | |
1578 | conn->viewer_session->current_trace_chunk, | |
1579 | vstream->stream_file.trace_chunk); | |
1580 | lttng_trace_chunk_put(vstream->stream_file.trace_chunk); | |
1581 | acquired_reference = lttng_trace_chunk_get(conn->viewer_session->current_trace_chunk); | |
1582 | assert(acquired_reference); | |
1583 | vstream->stream_file.trace_chunk = | |
1584 | conn->viewer_session->current_trace_chunk; | |
1585 | viewer_stream_sync_tracefile_array_tail(vstream); | |
1586 | viewer_stream_close_files(vstream); | |
d3e2ba59 JD |
1587 | } |
1588 | ||
878c34cf | 1589 | ret = check_index_status(vstream, rstream, ctf_trace, &viewer_index); |
878c34cf | 1590 | if (ret < 0) { |
7591bab1 | 1591 | goto error_put; |
878c34cf DG |
1592 | } else if (ret == 1) { |
1593 | /* | |
7591bab1 MD |
1594 | * We have no index to send and check_index_status has populated |
1595 | * viewer_index's status. | |
878c34cf | 1596 | */ |
d3e2ba59 JD |
1597 | goto send_reply; |
1598 | } | |
7591bab1 | 1599 | /* At this point, ret is 0 thus we will be able to read the index. */ |
878c34cf | 1600 | assert(!ret); |
d3e2ba59 | 1601 | |
b0d240a2 MD |
1602 | /* Try to open an index if one is needed for that stream. */ |
1603 | ret = try_open_index(vstream, rstream); | |
1604 | if (ret == -ENOENT) { | |
1605 | if (rstream->closed) { | |
1606 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1607 | goto send_reply; | |
1608 | } else { | |
1609 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_RETRY); | |
1610 | goto send_reply; | |
1611 | } | |
1612 | } | |
1613 | if (ret < 0) { | |
1614 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); | |
1615 | goto send_reply; | |
1616 | } | |
1617 | ||
7591bab1 MD |
1618 | /* |
1619 | * vstream->stream_fd may be NULL if it has been closed by | |
1620 | * tracefile rotation, or if we are at the beginning of the | |
1621 | * stream. We open the data stream file here to protect against | |
1622 | * overwrite caused by tracefile rotation (in association with | |
1623 | * unlink performed before overwrite). | |
1624 | */ | |
8bb66c3c | 1625 | if (!vstream->stream_file.handle) { |
ebb29c10 JG |
1626 | char file_path[LTTNG_PATH_MAX]; |
1627 | enum lttng_trace_chunk_status status; | |
8bb66c3c | 1628 | struct fs_handle *fs_handle; |
ebb29c10 JG |
1629 | |
1630 | ret = utils_stream_file_path(rstream->path_name, | |
1631 | rstream->channel_name, rstream->tracefile_size, | |
1632 | vstream->current_tracefile_id, NULL, file_path, | |
1633 | sizeof(file_path)); | |
7591bab1 MD |
1634 | if (ret < 0) { |
1635 | goto error_put; | |
1636 | } | |
ebb29c10 | 1637 | |
3ff5c5db MD |
1638 | /* |
1639 | * It is possible the the file we are trying to open is | |
1640 | * missing if the stream has been closed (application exits with | |
1641 | * per-pid buffers) and a clear command has been performed. | |
1642 | */ | |
8bb66c3c | 1643 | status = lttng_trace_chunk_open_fs_handle( |
ebb29c10 | 1644 | vstream->stream_file.trace_chunk, |
8bb66c3c | 1645 | file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 1646 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
1647 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE && |
1648 | rstream->closed) { | |
1649 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_HUP); | |
1650 | goto send_reply; | |
1651 | } | |
ebb29c10 | 1652 | PERROR("Failed to open trace file for viewer stream"); |
7591bab1 MD |
1653 | goto error_put; |
1654 | } | |
8bb66c3c | 1655 | vstream->stream_file.handle = fs_handle; |
d3e2ba59 JD |
1656 | } |
1657 | ||
f04a971b | 1658 | ret = check_new_streams(conn); |
4a9daf17 | 1659 | if (ret < 0) { |
7591bab1 MD |
1660 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
1661 | goto send_reply; | |
4a9daf17 JD |
1662 | } else if (ret == 1) { |
1663 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_STREAM; | |
1664 | } | |
1665 | ||
f8f3885c MD |
1666 | ret = lttng_index_file_read(vstream->index_file, &packet_index); |
1667 | if (ret) { | |
8bb66c3c | 1668 | ERR("Relay error reading index file"); |
7591bab1 | 1669 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_ERR); |
6b6b9a5a | 1670 | goto send_reply; |
d3e2ba59 | 1671 | } else { |
c4e361a4 | 1672 | viewer_index.status = htobe32(LTTNG_VIEWER_INDEX_OK); |
a44ca2ca | 1673 | vstream->index_sent_seqcount++; |
d3e2ba59 JD |
1674 | } |
1675 | ||
1676 | /* | |
1677 | * Indexes are stored in big endian, no need to switch before sending. | |
1678 | */ | |
7591bab1 MD |
1679 | DBG("Sending viewer index for stream %" PRIu64 " offset %" PRIu64, |
1680 | rstream->stream_handle, | |
9b9f9f94 | 1681 | (uint64_t) be64toh(packet_index.offset)); |
d3e2ba59 JD |
1682 | viewer_index.offset = packet_index.offset; |
1683 | viewer_index.packet_size = packet_index.packet_size; | |
1684 | viewer_index.content_size = packet_index.content_size; | |
1685 | viewer_index.timestamp_begin = packet_index.timestamp_begin; | |
1686 | viewer_index.timestamp_end = packet_index.timestamp_end; | |
1687 | viewer_index.events_discarded = packet_index.events_discarded; | |
1688 | viewer_index.stream_id = packet_index.stream_id; | |
1689 | ||
1690 | send_reply: | |
f1883937 MD |
1691 | if (rstream) { |
1692 | pthread_mutex_unlock(&rstream->lock); | |
1693 | } | |
7591bab1 MD |
1694 | |
1695 | if (metadata_viewer_stream) { | |
1696 | pthread_mutex_lock(&metadata_viewer_stream->stream->lock); | |
1697 | DBG("get next index metadata check: recv %" PRIu64 | |
1698 | " sent %" PRIu64, | |
1699 | metadata_viewer_stream->stream->metadata_received, | |
1700 | metadata_viewer_stream->metadata_sent); | |
1701 | if (!metadata_viewer_stream->stream->metadata_received || | |
1702 | metadata_viewer_stream->stream->metadata_received > | |
1703 | metadata_viewer_stream->metadata_sent) { | |
1704 | viewer_index.flags |= LTTNG_VIEWER_FLAG_NEW_METADATA; | |
1705 | } | |
1706 | pthread_mutex_unlock(&metadata_viewer_stream->stream->lock); | |
1707 | } | |
1708 | ||
d3e2ba59 | 1709 | viewer_index.flags = htobe32(viewer_index.flags); |
eea7556c | 1710 | health_code_update(); |
2f8f53af | 1711 | |
58eb9381 | 1712 | ret = send_response(conn->sock, &viewer_index, sizeof(viewer_index)); |
d3e2ba59 | 1713 | if (ret < 0) { |
7591bab1 | 1714 | goto end; |
d3e2ba59 | 1715 | } |
eea7556c | 1716 | health_code_update(); |
d3e2ba59 | 1717 | |
9237e6a1 MD |
1718 | if (vstream) { |
1719 | DBG("Index %" PRIu64 " for stream %" PRIu64 " sent", | |
a44ca2ca | 1720 | vstream->index_sent_seqcount, |
9237e6a1 MD |
1721 | vstream->stream->stream_handle); |
1722 | } | |
d3e2ba59 | 1723 | end: |
7591bab1 MD |
1724 | if (metadata_viewer_stream) { |
1725 | viewer_stream_put(metadata_viewer_stream); | |
1726 | } | |
1727 | if (vstream) { | |
1728 | viewer_stream_put(vstream); | |
1729 | } | |
1730 | return ret; | |
1731 | ||
1732 | error_put: | |
1733 | pthread_mutex_unlock(&rstream->lock); | |
1734 | if (metadata_viewer_stream) { | |
1735 | viewer_stream_put(metadata_viewer_stream); | |
1736 | } | |
1737 | viewer_stream_put(vstream); | |
d3e2ba59 JD |
1738 | return ret; |
1739 | } | |
1740 | ||
1741 | /* | |
1742 | * Send the next index for a stream | |
1743 | * | |
1744 | * Return 0 on success or else a negative value. | |
1745 | */ | |
1746 | static | |
58eb9381 | 1747 | int viewer_get_packet(struct relay_connection *conn) |
d3e2ba59 | 1748 | { |
b6025e94 | 1749 | int ret; |
a5df8828 | 1750 | off_t lseek_ret; |
553b2adb | 1751 | char *reply = NULL; |
d3e2ba59 | 1752 | struct lttng_viewer_get_packet get_packet_info; |
553b2adb | 1753 | struct lttng_viewer_trace_packet reply_header; |
7591bab1 | 1754 | struct relay_viewer_stream *vstream = NULL; |
553b2adb | 1755 | uint32_t reply_size = sizeof(reply_header); |
b6025e94 JR |
1756 | uint32_t packet_data_len = 0; |
1757 | ssize_t read_len; | |
8bb66c3c | 1758 | uint64_t stream_id; |
d3e2ba59 JD |
1759 | |
1760 | DBG2("Relay get data packet"); | |
1761 | ||
eea7556c | 1762 | health_code_update(); |
2f8f53af | 1763 | |
7591bab1 MD |
1764 | ret = recv_request(conn->sock, &get_packet_info, |
1765 | sizeof(get_packet_info)); | |
2f8f53af | 1766 | if (ret < 0) { |
d3e2ba59 JD |
1767 | goto end; |
1768 | } | |
eea7556c | 1769 | health_code_update(); |
d3e2ba59 | 1770 | |
0233a6a5 | 1771 | /* From this point on, the error label can be reached. */ |
553b2adb | 1772 | memset(&reply_header, 0, sizeof(reply_header)); |
8bb66c3c | 1773 | stream_id = (uint64_t) be64toh(get_packet_info.stream_id); |
0233a6a5 | 1774 | |
8bb66c3c | 1775 | vstream = viewer_stream_get_by_id(stream_id); |
7591bab1 | 1776 | if (!vstream) { |
a44ca2ca | 1777 | DBG("Client requested packet of unknown stream id %" PRIu64, |
8bb66c3c | 1778 | stream_id); |
553b2adb JG |
1779 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
1780 | goto send_reply_nolock; | |
b6025e94 JR |
1781 | } else { |
1782 | packet_data_len = be32toh(get_packet_info.len); | |
553b2adb | 1783 | reply_size += packet_data_len; |
d3e2ba59 | 1784 | } |
2a174661 | 1785 | |
553b2adb JG |
1786 | reply = zmalloc(reply_size); |
1787 | if (!reply) { | |
1788 | PERROR("packet reply zmalloc"); | |
1789 | reply_size = sizeof(reply_header); | |
d3e2ba59 JD |
1790 | goto error; |
1791 | } | |
1792 | ||
b6025e94 | 1793 | pthread_mutex_lock(&vstream->stream->lock); |
8bb66c3c | 1794 | lseek_ret = fs_handle_seek(vstream->stream_file.handle, |
ebb29c10 | 1795 | be64toh(get_packet_info.offset), SEEK_SET); |
a5df8828 | 1796 | if (lseek_ret < 0) { |
8bb66c3c JG |
1797 | PERROR("Failed to seek file system handle of viewer stream %" PRIu64 |
1798 | " to offset %" PRIu64, | |
1799 | stream_id, | |
ebb29c10 | 1800 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1801 | goto error; |
d3e2ba59 | 1802 | } |
8bb66c3c | 1803 | read_len = fs_handle_read(vstream->stream_file.handle, |
ebb29c10 | 1804 | reply + sizeof(reply_header), packet_data_len); |
b6025e94 | 1805 | if (read_len < packet_data_len) { |
8bb66c3c JG |
1806 | PERROR("Failed to read from file system handle of viewer stream id %" PRIu64 |
1807 | ", offset: %" PRIu64, | |
1808 | stream_id, | |
9b9f9f94 | 1809 | (uint64_t) be64toh(get_packet_info.offset)); |
7591bab1 | 1810 | goto error; |
d3e2ba59 | 1811 | } |
553b2adb JG |
1812 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_OK); |
1813 | reply_header.len = htobe32(packet_data_len); | |
d3e2ba59 JD |
1814 | goto send_reply; |
1815 | ||
1816 | error: | |
553b2adb | 1817 | reply_header.status = htobe32(LTTNG_VIEWER_GET_PACKET_ERR); |
d3e2ba59 JD |
1818 | |
1819 | send_reply: | |
7591bab1 MD |
1820 | if (vstream) { |
1821 | pthread_mutex_unlock(&vstream->stream->lock); | |
1822 | } | |
1823 | send_reply_nolock: | |
eea7556c MD |
1824 | |
1825 | health_code_update(); | |
2f8f53af | 1826 | |
553b2adb JG |
1827 | if (reply) { |
1828 | memcpy(reply, &reply_header, sizeof(reply_header)); | |
1829 | ret = send_response(conn->sock, reply, reply_size); | |
1830 | } else { | |
1831 | /* No reply to send. */ | |
1832 | ret = send_response(conn->sock, &reply_header, | |
1833 | reply_size); | |
1834 | } | |
1835 | ||
b6025e94 | 1836 | health_code_update(); |
d3e2ba59 | 1837 | if (ret < 0) { |
b6025e94 | 1838 | PERROR("sendmsg of packet data failed"); |
7591bab1 | 1839 | goto end_free; |
d3e2ba59 | 1840 | } |
d3e2ba59 | 1841 | |
8bb66c3c | 1842 | DBG("Sent %u bytes for stream %" PRIu64, reply_size, stream_id); |
d3e2ba59 | 1843 | |
7591bab1 | 1844 | end_free: |
553b2adb | 1845 | free(reply); |
d3e2ba59 | 1846 | end: |
7591bab1 MD |
1847 | if (vstream) { |
1848 | viewer_stream_put(vstream); | |
1849 | } | |
d3e2ba59 JD |
1850 | return ret; |
1851 | } | |
1852 | ||
1853 | /* | |
1854 | * Send the session's metadata | |
1855 | * | |
1856 | * Return 0 on success else a negative value. | |
1857 | */ | |
1858 | static | |
58eb9381 | 1859 | int viewer_get_metadata(struct relay_connection *conn) |
d3e2ba59 JD |
1860 | { |
1861 | int ret = 0; | |
8bb66c3c | 1862 | int fd = -1; |
d3e2ba59 JD |
1863 | ssize_t read_len; |
1864 | uint64_t len = 0; | |
1865 | char *data = NULL; | |
1866 | struct lttng_viewer_get_metadata request; | |
1867 | struct lttng_viewer_metadata_packet reply; | |
7591bab1 | 1868 | struct relay_viewer_stream *vstream = NULL; |
d3e2ba59 | 1869 | |
58eb9381 | 1870 | assert(conn); |
d3e2ba59 JD |
1871 | |
1872 | DBG("Relay get metadata"); | |
1873 | ||
eea7556c | 1874 | health_code_update(); |
2f8f53af | 1875 | |
58eb9381 | 1876 | ret = recv_request(conn->sock, &request, sizeof(request)); |
2f8f53af | 1877 | if (ret < 0) { |
d3e2ba59 JD |
1878 | goto end; |
1879 | } | |
eea7556c | 1880 | health_code_update(); |
d3e2ba59 | 1881 | |
53efb85a MD |
1882 | memset(&reply, 0, sizeof(reply)); |
1883 | ||
7591bab1 MD |
1884 | vstream = viewer_stream_get_by_id(be64toh(request.stream_id)); |
1885 | if (!vstream) { | |
3b463131 MD |
1886 | /* |
1887 | * The metadata stream can be closed by a CLOSE command | |
1888 | * just before we attach. It can also be closed by | |
1889 | * per-pid tracing during tracing. Therefore, it is | |
1890 | * possible that we cannot find this viewer stream. | |
1891 | * Reply back to the client with an error if we cannot | |
1892 | * find it. | |
1893 | */ | |
a44ca2ca | 1894 | DBG("Client requested metadata of unknown stream id %" PRIu64, |
9b9f9f94 | 1895 | (uint64_t) be64toh(request.stream_id)); |
3b463131 | 1896 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
7591bab1 | 1897 | goto send_reply; |
d3e2ba59 | 1898 | } |
7591bab1 MD |
1899 | pthread_mutex_lock(&vstream->stream->lock); |
1900 | if (!vstream->stream->is_metadata) { | |
1901 | ERR("Invalid metadata stream"); | |
6763619c JD |
1902 | goto error; |
1903 | } | |
1904 | ||
b0d240a2 | 1905 | if (vstream->metadata_sent >= vstream->stream->metadata_received) { |
94f73d08 MD |
1906 | /* |
1907 | * The live viewers expect to receive a NO_NEW_METADATA | |
1908 | * status before a stream disappears, otherwise they abort the | |
1909 | * entire live connection when receiving an error status. | |
b0d240a2 MD |
1910 | * |
1911 | * Clear feature resets the metadata_sent to 0 until the | |
1912 | * same metadata is received again. | |
94f73d08 | 1913 | */ |
c4e361a4 | 1914 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); |
94f73d08 MD |
1915 | /* |
1916 | * The live viewer considers a closed 0 byte metadata stream as | |
1917 | * an error. | |
1918 | */ | |
1919 | if (vstream->metadata_sent > 0) { | |
1920 | vstream->stream->no_new_metadata_notified = true; | |
1921 | if (vstream->stream->closed) { | |
1922 | /* Release ownership for the viewer metadata stream. */ | |
1923 | viewer_stream_put(vstream); | |
1924 | } | |
1925 | } | |
d3e2ba59 JD |
1926 | goto send_reply; |
1927 | } | |
1928 | ||
b0d240a2 MD |
1929 | len = vstream->stream->metadata_received - vstream->metadata_sent; |
1930 | ||
d3e2ba59 | 1931 | /* first time, we open the metadata file */ |
8bb66c3c JG |
1932 | if (!vstream->stream_file.handle) { |
1933 | struct fs_handle *fs_handle; | |
ebb29c10 JG |
1934 | char file_path[LTTNG_PATH_MAX]; |
1935 | enum lttng_trace_chunk_status status; | |
1936 | struct relay_stream *rstream = vstream->stream; | |
1937 | ||
1938 | ret = utils_stream_file_path(rstream->path_name, | |
1939 | rstream->channel_name, rstream->tracefile_size, | |
1940 | vstream->current_tracefile_id, NULL, file_path, | |
1941 | sizeof(file_path)); | |
d3e2ba59 JD |
1942 | if (ret < 0) { |
1943 | goto error; | |
1944 | } | |
ebb29c10 | 1945 | |
3ff5c5db MD |
1946 | /* |
1947 | * It is possible the the metadata file we are trying to open is | |
1948 | * missing if the stream has been closed (application exits with | |
1949 | * per-pid buffers) and a clear command has been performed. | |
1950 | */ | |
8bb66c3c | 1951 | status = lttng_trace_chunk_open_fs_handle( |
ebb29c10 | 1952 | vstream->stream_file.trace_chunk, |
8bb66c3c | 1953 | file_path, O_RDONLY, 0, &fs_handle, true); |
ebb29c10 | 1954 | if (status != LTTNG_TRACE_CHUNK_STATUS_OK) { |
b0d240a2 MD |
1955 | if (status == LTTNG_TRACE_CHUNK_STATUS_NO_FILE) { |
1956 | reply.status = htobe32(LTTNG_VIEWER_NO_NEW_METADATA); | |
1957 | len = 0; | |
1958 | if (vstream->stream->closed) { | |
1959 | viewer_stream_put(vstream); | |
1960 | } | |
1961 | goto send_reply; | |
1962 | } | |
ebb29c10 | 1963 | PERROR("Failed to open metadata file for viewer stream"); |
d3e2ba59 JD |
1964 | goto error; |
1965 | } | |
8bb66c3c | 1966 | vstream->stream_file.handle = fs_handle; |
d3e2ba59 JD |
1967 | } |
1968 | ||
1969 | reply.len = htobe64(len); | |
1970 | data = zmalloc(len); | |
1971 | if (!data) { | |
1972 | PERROR("viewer metadata zmalloc"); | |
1973 | goto error; | |
1974 | } | |
1975 | ||
8bb66c3c JG |
1976 | fd = fs_handle_get_fd(vstream->stream_file.handle); |
1977 | if (fd < 0) { | |
1978 | ERR("Failed to restore viewer stream file system handle"); | |
1979 | goto error; | |
1980 | } | |
1981 | read_len = lttng_read(fd, data, len); | |
1982 | fs_handle_put_fd(vstream->stream_file.handle); | |
1983 | fd = -1; | |
6cd525e8 | 1984 | if (read_len < len) { |
d3e2ba59 JD |
1985 | PERROR("Relay reading metadata file"); |
1986 | goto error; | |
1987 | } | |
7591bab1 | 1988 | vstream->metadata_sent += read_len; |
c4e361a4 | 1989 | reply.status = htobe32(LTTNG_VIEWER_METADATA_OK); |
7591bab1 | 1990 | |
d3e2ba59 JD |
1991 | goto send_reply; |
1992 | ||
1993 | error: | |
c4e361a4 | 1994 | reply.status = htobe32(LTTNG_VIEWER_METADATA_ERR); |
d3e2ba59 JD |
1995 | |
1996 | send_reply: | |
eea7556c | 1997 | health_code_update(); |
7591bab1 MD |
1998 | if (vstream) { |
1999 | pthread_mutex_unlock(&vstream->stream->lock); | |
2000 | } | |
58eb9381 | 2001 | ret = send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 | 2002 | if (ret < 0) { |
7591bab1 | 2003 | goto end_free; |
d3e2ba59 | 2004 | } |
eea7556c | 2005 | health_code_update(); |
d3e2ba59 JD |
2006 | |
2007 | if (len > 0) { | |
58eb9381 | 2008 | ret = send_response(conn->sock, data, len); |
d3e2ba59 | 2009 | if (ret < 0) { |
7591bab1 | 2010 | goto end_free; |
d3e2ba59 JD |
2011 | } |
2012 | } | |
2013 | ||
2014 | DBG("Sent %" PRIu64 " bytes of metadata for stream %" PRIu64, len, | |
9b9f9f94 | 2015 | (uint64_t) be64toh(request.stream_id)); |
d3e2ba59 JD |
2016 | |
2017 | DBG("Metadata sent"); | |
2018 | ||
7591bab1 | 2019 | end_free: |
d3e2ba59 | 2020 | free(data); |
d3e2ba59 | 2021 | end: |
7591bab1 MD |
2022 | if (vstream) { |
2023 | viewer_stream_put(vstream); | |
2024 | } | |
d3e2ba59 JD |
2025 | return ret; |
2026 | } | |
2027 | ||
c3b7390b JD |
2028 | /* |
2029 | * Create a viewer session. | |
2030 | * | |
2031 | * Return 0 on success or else a negative value. | |
2032 | */ | |
2033 | static | |
2034 | int viewer_create_session(struct relay_connection *conn) | |
2035 | { | |
2036 | int ret; | |
2037 | struct lttng_viewer_create_session_response resp; | |
2038 | ||
2039 | DBG("Viewer create session received"); | |
2040 | ||
53efb85a | 2041 | memset(&resp, 0, sizeof(resp)); |
c3b7390b | 2042 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_OK); |
7591bab1 | 2043 | conn->viewer_session = viewer_session_create(); |
c3b7390b JD |
2044 | if (!conn->viewer_session) { |
2045 | ERR("Allocation viewer session"); | |
2046 | resp.status = htobe32(LTTNG_VIEWER_CREATE_SESSION_ERR); | |
2047 | goto send_reply; | |
2048 | } | |
c3b7390b JD |
2049 | |
2050 | send_reply: | |
2051 | health_code_update(); | |
2052 | ret = send_response(conn->sock, &resp, sizeof(resp)); | |
2053 | if (ret < 0) { | |
2054 | goto end; | |
2055 | } | |
2056 | health_code_update(); | |
2057 | ret = 0; | |
2058 | ||
2059 | end: | |
2060 | return ret; | |
2061 | } | |
2062 | ||
d62023be JD |
2063 | /* |
2064 | * Detach a viewer session. | |
2065 | * | |
2066 | * Return 0 on success or else a negative value. | |
2067 | */ | |
2068 | static | |
2069 | int viewer_detach_session(struct relay_connection *conn) | |
2070 | { | |
2071 | int ret; | |
2072 | struct lttng_viewer_detach_session_response response; | |
2073 | struct lttng_viewer_detach_session_request request; | |
2074 | struct relay_session *session = NULL; | |
2075 | uint64_t viewer_session_to_close; | |
2076 | ||
2077 | DBG("Viewer detach session received"); | |
2078 | ||
2079 | assert(conn); | |
2080 | ||
2081 | health_code_update(); | |
2082 | ||
2083 | /* Receive the request from the connected client. */ | |
2084 | ret = recv_request(conn->sock, &request, sizeof(request)); | |
2085 | if (ret < 0) { | |
2086 | goto end; | |
2087 | } | |
2088 | viewer_session_to_close = be64toh(request.session_id); | |
2089 | ||
2090 | if (!conn->viewer_session) { | |
2091 | DBG("Client trying to detach before creating a live viewer session"); | |
2092 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2093 | goto send_reply; | |
2094 | } | |
2095 | ||
2096 | health_code_update(); | |
2097 | ||
2098 | memset(&response, 0, sizeof(response)); | |
2099 | DBG("Detaching from session ID %" PRIu64, viewer_session_to_close); | |
2100 | ||
2101 | session = session_get_by_id(be64toh(request.session_id)); | |
2102 | if (!session) { | |
2103 | DBG("Relay session %" PRIu64 " not found", | |
9b9f9f94 | 2104 | (uint64_t) be64toh(request.session_id)); |
d62023be JD |
2105 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_UNK); |
2106 | goto send_reply; | |
2107 | } | |
2108 | ||
2109 | ret = viewer_session_is_attached(conn->viewer_session, session); | |
2110 | if (ret != 1) { | |
2111 | DBG("Not attached to this session"); | |
2112 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_ERR); | |
2113 | goto send_reply_put; | |
2114 | } | |
2115 | ||
2116 | viewer_session_close_one_session(conn->viewer_session, session); | |
2117 | response.status = htobe32(LTTNG_VIEWER_DETACH_SESSION_OK); | |
2118 | DBG("Session %" PRIu64 " detached.", viewer_session_to_close); | |
2119 | ||
2120 | send_reply_put: | |
2121 | session_put(session); | |
2122 | ||
2123 | send_reply: | |
2124 | health_code_update(); | |
2125 | ret = send_response(conn->sock, &response, sizeof(response)); | |
2126 | if (ret < 0) { | |
2127 | goto end; | |
2128 | } | |
2129 | health_code_update(); | |
2130 | ret = 0; | |
2131 | ||
2132 | end: | |
2133 | return ret; | |
2134 | } | |
c3b7390b | 2135 | |
d3e2ba59 JD |
2136 | /* |
2137 | * live_relay_unknown_command: send -1 if received unknown command | |
2138 | */ | |
2139 | static | |
58eb9381 | 2140 | void live_relay_unknown_command(struct relay_connection *conn) |
d3e2ba59 JD |
2141 | { |
2142 | struct lttcomm_relayd_generic_reply reply; | |
d3e2ba59 | 2143 | |
53efb85a | 2144 | memset(&reply, 0, sizeof(reply)); |
d3e2ba59 | 2145 | reply.ret_code = htobe32(LTTNG_ERR_UNK); |
58eb9381 | 2146 | (void) send_response(conn->sock, &reply, sizeof(reply)); |
d3e2ba59 JD |
2147 | } |
2148 | ||
2149 | /* | |
2150 | * Process the commands received on the control socket | |
2151 | */ | |
2152 | static | |
2153 | int process_control(struct lttng_viewer_cmd *recv_hdr, | |
58eb9381 | 2154 | struct relay_connection *conn) |
d3e2ba59 JD |
2155 | { |
2156 | int ret = 0; | |
2f8f53af DG |
2157 | uint32_t msg_value; |
2158 | ||
2f8f53af DG |
2159 | msg_value = be32toh(recv_hdr->cmd); |
2160 | ||
2161 | /* | |
2162 | * Make sure we've done the version check before any command other then a | |
2163 | * new client connection. | |
2164 | */ | |
c4e361a4 | 2165 | if (msg_value != LTTNG_VIEWER_CONNECT && !conn->version_check_done) { |
58eb9381 | 2166 | ERR("Viewer conn value %" PRIu32 " before version check", msg_value); |
2f8f53af DG |
2167 | ret = -1; |
2168 | goto end; | |
2169 | } | |
d3e2ba59 | 2170 | |
2f8f53af | 2171 | switch (msg_value) { |
c4e361a4 | 2172 | case LTTNG_VIEWER_CONNECT: |
58eb9381 | 2173 | ret = viewer_connect(conn); |
d3e2ba59 | 2174 | break; |
c4e361a4 | 2175 | case LTTNG_VIEWER_LIST_SESSIONS: |
58eb9381 | 2176 | ret = viewer_list_sessions(conn); |
d3e2ba59 | 2177 | break; |
c4e361a4 | 2178 | case LTTNG_VIEWER_ATTACH_SESSION: |
58eb9381 | 2179 | ret = viewer_attach_session(conn); |
d3e2ba59 | 2180 | break; |
c4e361a4 | 2181 | case LTTNG_VIEWER_GET_NEXT_INDEX: |
58eb9381 | 2182 | ret = viewer_get_next_index(conn); |
d3e2ba59 | 2183 | break; |
c4e361a4 | 2184 | case LTTNG_VIEWER_GET_PACKET: |
58eb9381 | 2185 | ret = viewer_get_packet(conn); |
d3e2ba59 | 2186 | break; |
c4e361a4 | 2187 | case LTTNG_VIEWER_GET_METADATA: |
58eb9381 | 2188 | ret = viewer_get_metadata(conn); |
d3e2ba59 | 2189 | break; |
c4e361a4 | 2190 | case LTTNG_VIEWER_GET_NEW_STREAMS: |
58eb9381 | 2191 | ret = viewer_get_new_streams(conn); |
80e8027a | 2192 | break; |
c3b7390b JD |
2193 | case LTTNG_VIEWER_CREATE_SESSION: |
2194 | ret = viewer_create_session(conn); | |
2195 | break; | |
d62023be JD |
2196 | case LTTNG_VIEWER_DETACH_SESSION: |
2197 | ret = viewer_detach_session(conn); | |
2198 | break; | |
d3e2ba59 | 2199 | default: |
7591bab1 MD |
2200 | ERR("Received unknown viewer command (%u)", |
2201 | be32toh(recv_hdr->cmd)); | |
58eb9381 | 2202 | live_relay_unknown_command(conn); |
d3e2ba59 JD |
2203 | ret = -1; |
2204 | goto end; | |
2205 | } | |
2206 | ||
2207 | end: | |
2208 | return ret; | |
2209 | } | |
2210 | ||
2211 | static | |
58eb9381 | 2212 | void cleanup_connection_pollfd(struct lttng_poll_event *events, int pollfd) |
d3e2ba59 JD |
2213 | { |
2214 | int ret; | |
2215 | ||
58eb9381 | 2216 | (void) lttng_poll_del(events, pollfd); |
d3e2ba59 | 2217 | |
29555a78 JG |
2218 | ret = fd_tracker_close_unsuspendable_fd(the_fd_tracker, &pollfd, 1, |
2219 | fd_tracker_util_close_fd, NULL); | |
d3e2ba59 JD |
2220 | if (ret < 0) { |
2221 | ERR("Closing pollfd %d", pollfd); | |
2222 | } | |
2223 | } | |
2224 | ||
d3e2ba59 JD |
2225 | /* |
2226 | * This thread does the actual work | |
2227 | */ | |
2228 | static | |
2229 | void *thread_worker(void *data) | |
2230 | { | |
2231 | int ret, err = -1; | |
2232 | uint32_t nb_fd; | |
d3e2ba59 | 2233 | struct lttng_poll_event events; |
7591bab1 | 2234 | struct lttng_ht *viewer_connections_ht; |
d3e2ba59 JD |
2235 | struct lttng_ht_iter iter; |
2236 | struct lttng_viewer_cmd recv_hdr; | |
302d8906 | 2237 | struct relay_connection *destroy_conn; |
d3e2ba59 JD |
2238 | |
2239 | DBG("[thread] Live viewer relay worker started"); | |
2240 | ||
2241 | rcu_register_thread(); | |
2242 | ||
eea7556c MD |
2243 | health_register(health_relayd, HEALTH_RELAYD_TYPE_LIVE_WORKER); |
2244 | ||
9b5e0863 MD |
2245 | if (testpoint(relayd_thread_live_worker)) { |
2246 | goto error_testpoint; | |
2247 | } | |
2248 | ||
d3e2ba59 | 2249 | /* table of connections indexed on socket */ |
7591bab1 MD |
2250 | viewer_connections_ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
2251 | if (!viewer_connections_ht) { | |
2252 | goto viewer_connections_ht_error; | |
d3e2ba59 JD |
2253 | } |
2254 | ||
35bc1f58 JG |
2255 | ret = create_named_thread_poll_set(&events, 2, |
2256 | "Live viewer worker thread epoll"); | |
d3e2ba59 JD |
2257 | if (ret < 0) { |
2258 | goto error_poll_create; | |
2259 | } | |
2260 | ||
58eb9381 | 2261 | ret = lttng_poll_add(&events, live_conn_pipe[0], LPOLLIN | LPOLLRDHUP); |
d3e2ba59 JD |
2262 | if (ret < 0) { |
2263 | goto error; | |
2264 | } | |
2265 | ||
2266 | restart: | |
2267 | while (1) { | |
2268 | int i; | |
2269 | ||
eea7556c MD |
2270 | health_code_update(); |
2271 | ||
d3e2ba59 JD |
2272 | /* Infinite blocking call, waiting for transmission */ |
2273 | DBG3("Relayd live viewer worker thread polling..."); | |
eea7556c | 2274 | health_poll_entry(); |
d3e2ba59 | 2275 | ret = lttng_poll_wait(&events, -1); |
eea7556c | 2276 | health_poll_exit(); |
d3e2ba59 JD |
2277 | if (ret < 0) { |
2278 | /* | |
2279 | * Restart interrupted system call. | |
2280 | */ | |
2281 | if (errno == EINTR) { | |
2282 | goto restart; | |
2283 | } | |
2284 | goto error; | |
2285 | } | |
2286 | ||
2287 | nb_fd = ret; | |
2288 | ||
2289 | /* | |
2290 | * Process control. The control connection is prioritised so we don't | |
2291 | * starve it with high throughput tracing data on the data | |
2292 | * connection. | |
2293 | */ | |
2294 | for (i = 0; i < nb_fd; i++) { | |
2295 | /* Fetch once the poll data */ | |
2296 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
2297 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
2298 | ||
eea7556c MD |
2299 | health_code_update(); |
2300 | ||
d3e2ba59 | 2301 | /* Thread quit pipe has been closed. Killing thread. */ |
bcf4a440 | 2302 | ret = check_thread_quit_pipe(pollfd, revents); |
d3e2ba59 JD |
2303 | if (ret) { |
2304 | err = 0; | |
2305 | goto exit; | |
2306 | } | |
2307 | ||
7591bab1 | 2308 | /* Inspect the relay conn pipe for new connection. */ |
58eb9381 | 2309 | if (pollfd == live_conn_pipe[0]) { |
03e43155 | 2310 | if (revents & LPOLLIN) { |
302d8906 JG |
2311 | struct relay_connection *conn; |
2312 | ||
7591bab1 MD |
2313 | ret = lttng_read(live_conn_pipe[0], |
2314 | &conn, sizeof(conn)); | |
d3e2ba59 JD |
2315 | if (ret < 0) { |
2316 | goto error; | |
2317 | } | |
73039936 FD |
2318 | ret = lttng_poll_add(&events, |
2319 | conn->sock->fd, | |
58eb9381 | 2320 | LPOLLIN | LPOLLRDHUP); |
73039936 FD |
2321 | if (ret) { |
2322 | ERR("Failed to add new live connection file descriptor to poll set"); | |
2323 | goto error; | |
2324 | } | |
7591bab1 MD |
2325 | connection_ht_add(viewer_connections_ht, conn); |
2326 | DBG("Connection socket %d added to poll", conn->sock->fd); | |
03e43155 MD |
2327 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2328 | ERR("Relay live pipe error"); | |
2329 | goto error; | |
2330 | } else { | |
2331 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2332 | goto error; | |
d3e2ba59 | 2333 | } |
58eb9381 | 2334 | } else { |
7591bab1 | 2335 | /* Connection activity. */ |
302d8906 JG |
2336 | struct relay_connection *conn; |
2337 | ||
7591bab1 MD |
2338 | conn = connection_get_by_sock(viewer_connections_ht, pollfd); |
2339 | if (!conn) { | |
2340 | continue; | |
2341 | } | |
58eb9381 | 2342 | |
03e43155 | 2343 | if (revents & LPOLLIN) { |
58eb9381 DG |
2344 | ret = conn->sock->ops->recvmsg(conn->sock, &recv_hdr, |
2345 | sizeof(recv_hdr), 0); | |
d3e2ba59 | 2346 | if (ret <= 0) { |
7591bab1 | 2347 | /* Connection closed. */ |
58eb9381 | 2348 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2349 | /* Put "create" ownership reference. */ |
2350 | connection_put(conn); | |
58eb9381 | 2351 | DBG("Viewer control conn closed with %d", pollfd); |
d3e2ba59 | 2352 | } else { |
58eb9381 | 2353 | ret = process_control(&recv_hdr, conn); |
d3e2ba59 JD |
2354 | if (ret < 0) { |
2355 | /* Clear the session on error. */ | |
58eb9381 | 2356 | cleanup_connection_pollfd(&events, pollfd); |
7591bab1 MD |
2357 | /* Put "create" ownership reference. */ |
2358 | connection_put(conn); | |
d3e2ba59 JD |
2359 | DBG("Viewer connection closed with %d", pollfd); |
2360 | } | |
2361 | } | |
03e43155 MD |
2362 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2363 | cleanup_connection_pollfd(&events, pollfd); | |
2364 | /* Put "create" ownership reference. */ | |
2365 | connection_put(conn); | |
2366 | } else { | |
2367 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2368 | connection_put(conn); | |
2369 | goto error; | |
d3e2ba59 | 2370 | } |
7591bab1 MD |
2371 | /* Put local "get_by_sock" reference. */ |
2372 | connection_put(conn); | |
d3e2ba59 JD |
2373 | } |
2374 | } | |
2375 | } | |
2376 | ||
2377 | exit: | |
2378 | error: | |
35bc1f58 | 2379 | (void) fd_tracker_util_poll_clean(the_fd_tracker, &events); |
d3e2ba59 | 2380 | |
71efa8ef | 2381 | /* Cleanup remaining connection object. */ |
d3e2ba59 | 2382 | rcu_read_lock(); |
7591bab1 | 2383 | cds_lfht_for_each_entry(viewer_connections_ht->ht, &iter.iter, |
302d8906 | 2384 | destroy_conn, |
58eb9381 | 2385 | sock_n.node) { |
eea7556c | 2386 | health_code_update(); |
7591bab1 | 2387 | connection_put(destroy_conn); |
d3e2ba59 JD |
2388 | } |
2389 | rcu_read_unlock(); | |
2390 | error_poll_create: | |
7591bab1 MD |
2391 | lttng_ht_destroy(viewer_connections_ht); |
2392 | viewer_connections_ht_error: | |
58eb9381 | 2393 | /* Close relay conn pipes */ |
87bcbe91 | 2394 | (void) fd_tracker_util_pipe_close(the_fd_tracker, live_conn_pipe); |
d3e2ba59 JD |
2395 | if (err) { |
2396 | DBG("Viewer worker thread exited with error"); | |
2397 | } | |
2398 | DBG("Viewer worker thread cleanup complete"); | |
9b5e0863 | 2399 | error_testpoint: |
eea7556c MD |
2400 | if (err) { |
2401 | health_error(); | |
2402 | ERR("Health error occurred in %s", __func__); | |
2403 | } | |
2404 | health_unregister(health_relayd); | |
b4aacfdc MD |
2405 | if (lttng_relay_stop_threads()) { |
2406 | ERR("Error stopping threads"); | |
178a0557 | 2407 | } |
d3e2ba59 JD |
2408 | rcu_unregister_thread(); |
2409 | return NULL; | |
2410 | } | |
2411 | ||
2412 | /* | |
2413 | * Create the relay command pipe to wake thread_manage_apps. | |
2414 | * Closed in cleanup(). | |
2415 | */ | |
58eb9381 | 2416 | static int create_conn_pipe(void) |
d3e2ba59 | 2417 | { |
87bcbe91 JG |
2418 | return fd_tracker_util_pipe_open_cloexec(the_fd_tracker, |
2419 | "Live connection pipe", live_conn_pipe); | |
178a0557 | 2420 | } |
d3e2ba59 | 2421 | |
178a0557 | 2422 | int relayd_live_join(void) |
d3e2ba59 | 2423 | { |
178a0557 | 2424 | int ret, retval = 0; |
d3e2ba59 JD |
2425 | void *status; |
2426 | ||
d3e2ba59 | 2427 | ret = pthread_join(live_listener_thread, &status); |
178a0557 MD |
2428 | if (ret) { |
2429 | errno = ret; | |
d3e2ba59 | 2430 | PERROR("pthread_join live listener"); |
178a0557 | 2431 | retval = -1; |
d3e2ba59 JD |
2432 | } |
2433 | ||
2434 | ret = pthread_join(live_worker_thread, &status); | |
178a0557 MD |
2435 | if (ret) { |
2436 | errno = ret; | |
d3e2ba59 | 2437 | PERROR("pthread_join live worker"); |
178a0557 | 2438 | retval = -1; |
d3e2ba59 JD |
2439 | } |
2440 | ||
2441 | ret = pthread_join(live_dispatcher_thread, &status); | |
178a0557 MD |
2442 | if (ret) { |
2443 | errno = ret; | |
d3e2ba59 | 2444 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2445 | retval = -1; |
d3e2ba59 JD |
2446 | } |
2447 | ||
178a0557 | 2448 | cleanup_relayd_live(); |
d3e2ba59 | 2449 | |
178a0557 | 2450 | return retval; |
d3e2ba59 JD |
2451 | } |
2452 | ||
2453 | /* | |
2454 | * main | |
2455 | */ | |
7591bab1 | 2456 | int relayd_live_create(struct lttng_uri *uri) |
d3e2ba59 | 2457 | { |
178a0557 | 2458 | int ret = 0, retval = 0; |
d3e2ba59 JD |
2459 | void *status; |
2460 | int is_root; | |
2461 | ||
178a0557 MD |
2462 | if (!uri) { |
2463 | retval = -1; | |
2464 | goto exit_init_data; | |
2465 | } | |
d3e2ba59 JD |
2466 | live_uri = uri; |
2467 | ||
d3e2ba59 JD |
2468 | /* Check if daemon is UID = 0 */ |
2469 | is_root = !getuid(); | |
2470 | ||
2471 | if (!is_root) { | |
2472 | if (live_uri->port < 1024) { | |
2473 | ERR("Need to be root to use ports < 1024"); | |
178a0557 MD |
2474 | retval = -1; |
2475 | goto exit_init_data; | |
d3e2ba59 JD |
2476 | } |
2477 | } | |
2478 | ||
2479 | /* Setup the thread apps communication pipe. */ | |
178a0557 MD |
2480 | if (create_conn_pipe()) { |
2481 | retval = -1; | |
2482 | goto exit_init_data; | |
d3e2ba59 JD |
2483 | } |
2484 | ||
2485 | /* Init relay command queue. */ | |
8bdee6e2 | 2486 | cds_wfcq_init(&viewer_conn_queue.head, &viewer_conn_queue.tail); |
d3e2ba59 JD |
2487 | |
2488 | /* Set up max poll set size */ | |
25b397f9 MD |
2489 | if (lttng_poll_set_max_size()) { |
2490 | retval = -1; | |
2491 | goto exit_init_data; | |
2492 | } | |
d3e2ba59 JD |
2493 | |
2494 | /* Setup the dispatcher thread */ | |
1a1a34b4 | 2495 | ret = pthread_create(&live_dispatcher_thread, default_pthread_attr(), |
d3e2ba59 | 2496 | thread_dispatcher, (void *) NULL); |
178a0557 MD |
2497 | if (ret) { |
2498 | errno = ret; | |
d3e2ba59 | 2499 | PERROR("pthread_create viewer dispatcher"); |
178a0557 MD |
2500 | retval = -1; |
2501 | goto exit_dispatcher_thread; | |
d3e2ba59 JD |
2502 | } |
2503 | ||
2504 | /* Setup the worker thread */ | |
1a1a34b4 | 2505 | ret = pthread_create(&live_worker_thread, default_pthread_attr(), |
7591bab1 | 2506 | thread_worker, NULL); |
178a0557 MD |
2507 | if (ret) { |
2508 | errno = ret; | |
d3e2ba59 | 2509 | PERROR("pthread_create viewer worker"); |
178a0557 MD |
2510 | retval = -1; |
2511 | goto exit_worker_thread; | |
d3e2ba59 JD |
2512 | } |
2513 | ||
2514 | /* Setup the listener thread */ | |
1a1a34b4 | 2515 | ret = pthread_create(&live_listener_thread, default_pthread_attr(), |
d3e2ba59 | 2516 | thread_listener, (void *) NULL); |
178a0557 MD |
2517 | if (ret) { |
2518 | errno = ret; | |
d3e2ba59 | 2519 | PERROR("pthread_create viewer listener"); |
178a0557 MD |
2520 | retval = -1; |
2521 | goto exit_listener_thread; | |
d3e2ba59 JD |
2522 | } |
2523 | ||
178a0557 MD |
2524 | /* |
2525 | * All OK, started all threads. | |
2526 | */ | |
2527 | return retval; | |
2528 | ||
9911d21b JG |
2529 | /* |
2530 | * Join on the live_listener_thread should anything be added after | |
2531 | * the live_listener thread's creation. | |
2532 | */ | |
d3e2ba59 | 2533 | |
178a0557 | 2534 | exit_listener_thread: |
d3e2ba59 | 2535 | |
d3e2ba59 | 2536 | ret = pthread_join(live_worker_thread, &status); |
178a0557 MD |
2537 | if (ret) { |
2538 | errno = ret; | |
d3e2ba59 | 2539 | PERROR("pthread_join live worker"); |
178a0557 | 2540 | retval = -1; |
d3e2ba59 | 2541 | } |
178a0557 | 2542 | exit_worker_thread: |
d3e2ba59 | 2543 | |
d3e2ba59 | 2544 | ret = pthread_join(live_dispatcher_thread, &status); |
178a0557 MD |
2545 | if (ret) { |
2546 | errno = ret; | |
d3e2ba59 | 2547 | PERROR("pthread_join live dispatcher"); |
178a0557 | 2548 | retval = -1; |
d3e2ba59 | 2549 | } |
178a0557 | 2550 | exit_dispatcher_thread: |
d3e2ba59 | 2551 | |
178a0557 MD |
2552 | exit_init_data: |
2553 | cleanup_relayd_live(); | |
d3e2ba59 | 2554 | |
178a0557 | 2555 | return retval; |
d3e2ba59 | 2556 | } |